From 388f7bd24d2ffc945ad08be3a592672c1e32156e Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Mon, 11 Mar 2013 20:18:15 -0300 Subject: w1: mxc_w1: Convert to devm_ioremap_resource() According to Documentation/driver-model/devres.txt: devm_request_and_ioremap() : obsoleted by devm_ioremap_resource() Signed-off-by: Fabio Estevam Signed-off-by: Greg Kroah-Hartman --- drivers/w1/masters/mxc_w1.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/w1/masters/mxc_w1.c b/drivers/w1/masters/mxc_w1.c index 950d354d50e2..47e12cfc2a57 100644 --- a/drivers/w1/masters/mxc_w1.c +++ b/drivers/w1/masters/mxc_w1.c @@ -121,9 +121,9 @@ static int mxc_w1_probe(struct platform_device *pdev) mdev->clkdiv = (clk_get_rate(mdev->clk) / 1000000) - 1; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - mdev->regs = devm_request_and_ioremap(&pdev->dev, res); - if (!mdev->regs) - return -EBUSY; + mdev->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(mdev->regs)) + return PTR_ERR(mdev->regs); clk_prepare_enable(mdev->clk); __raw_writeb(mdev->clkdiv, mdev->regs + MXC_W1_TIME_DIVIDER); -- cgit v1.2.3 From c8c8d080ed94cea6757f2d781b6e360a74b256fd Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Mon, 11 Mar 2013 18:27:02 +0200 Subject: mei: revamp mei_data2slots 1. Move the mei_data2slots to mei_dev.h as it will be used by the all supported HW. 2. Change return value from u8 to u32 to catch possible overflows 3. Eliminate computing the slots number twice in the same function Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/amthif.c | 11 +++++----- drivers/misc/mei/hw-me.c | 3 ++- drivers/misc/mei/hw-me.h | 6 ------ drivers/misc/mei/interrupt.c | 50 +++++++++++++++++++++++++------------------- drivers/misc/mei/mei_dev.h | 11 ++++++++++ 5 files changed, 47 insertions(+), 34 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index c86d7e3839a4..9a5e8c72628b 100644 --- a/drivers/misc/mei/amthif.c +++ b/drivers/misc/mei/amthif.c @@ -449,7 +449,7 @@ int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots, struct mei_msg_hdr mei_hdr; struct mei_cl *cl = cb->cl; size_t len = dev->iamthif_msg_buf_size - dev->iamthif_msg_buf_index; - size_t msg_slots = mei_data2slots(len); + u32 msg_slots = mei_data2slots(len); mei_hdr.host_addr = cl->host_client_id; mei_hdr.me_addr = cl->me_client_id; @@ -566,12 +566,13 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list, */ int mei_amthif_irq_read(struct mei_device *dev, s32 *slots) { + u32 msg_slots = mei_data2slots(sizeof(struct hbm_flow_control)); - if (((*slots) * sizeof(u32)) < (sizeof(struct mei_msg_hdr) - + sizeof(struct hbm_flow_control))) { + if (*slots < msg_slots) return -EMSGSIZE; - } - *slots -= mei_data2slots(sizeof(struct hbm_flow_control)); + + *slots -= msg_slots; + if (mei_hbm_cl_flow_control_req(dev, &dev->iamthif_cl)) { dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n"); return -EIO; diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 45ea7185c003..d21e5a761f2c 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -295,10 +295,11 @@ static int mei_me_write_message(struct mei_device *dev, unsigned char *buf) { struct mei_me_hw *hw = to_me_hw(dev); - unsigned long rem, dw_cnt; + unsigned long rem; unsigned long length = header->length; u32 *reg_buf = (u32 *)buf; u32 hcsr; + u32 dw_cnt; int i; int empty_slots; diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h index 8518d3eeb838..80bd829fbd9a 100644 --- a/drivers/misc/mei/hw-me.h +++ b/drivers/misc/mei/hw-me.h @@ -36,12 +36,6 @@ struct mei_me_hw { struct mei_device *mei_me_dev_init(struct pci_dev *pdev); -/* get slots (dwords) from a message length + header (bytes) */ -static inline unsigned char mei_data2slots(size_t length) -{ - return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4); -} - irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id); irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id); diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 3535b2676c97..14c70b8815d8 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -153,25 +153,27 @@ static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots, struct mei_cl *cl, struct mei_cl_cb *cmpl_list) { - if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) + - sizeof(struct hbm_client_connect_request))) - return -EBADMSG; + u32 msg_slots = + mei_data2slots(sizeof(struct hbm_client_connect_request)); - *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request)); + if (*slots < msg_slots) + return -EMSGSIZE; + + *slots -= msg_slots; if (mei_hbm_cl_disconnect_req(dev, cl)) { cl->status = 0; cb_pos->buf_idx = 0; list_move_tail(&cb_pos->list, &cmpl_list->list); - return -EMSGSIZE; - } else { - cl->state = MEI_FILE_DISCONNECTING; - cl->status = 0; - cb_pos->buf_idx = 0; - list_move_tail(&cb_pos->list, &dev->ctrl_rd_list.list); - cl->timer_count = MEI_CONNECT_TIMEOUT; + return -EIO; } + cl->state = MEI_FILE_DISCONNECTING; + cl->status = 0; + cb_pos->buf_idx = 0; + list_move_tail(&cb_pos->list, &dev->ctrl_rd_list.list); + cl->timer_count = MEI_CONNECT_TIMEOUT; + return 0; } @@ -192,14 +194,15 @@ static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots, struct mei_cl *cl, struct mei_cl_cb *cmpl_list) { - if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) + - sizeof(struct hbm_flow_control))) { + u32 msg_slots = mei_data2slots(sizeof(struct hbm_flow_control)); + + if (*slots < msg_slots) { /* return the cancel routine */ list_del(&cb_pos->list); - return -EBADMSG; + return -EMSGSIZE; } - *slots -= mei_data2slots(sizeof(struct hbm_flow_control)); + *slots -= msg_slots; if (mei_hbm_cl_flow_control_req(dev, cl)) { cl->status = -ENODEV; @@ -229,15 +232,19 @@ static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots, struct mei_cl *cl, struct mei_cl_cb *cmpl_list) { - if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) + - sizeof(struct hbm_client_connect_request))) { + u32 msg_slots = + mei_data2slots(sizeof(struct hbm_client_connect_request)); + + if (*slots < msg_slots) { /* return the cancel routine */ list_del(&cb_pos->list); - return -EBADMSG; + return -EMSGSIZE; } + *slots -= msg_slots; + cl->state = MEI_FILE_CONNECTING; - *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request)); + if (mei_hbm_cl_connect_req(dev, cl)) { cl->status = -ENODEV; cb_pos->buf_idx = 0; @@ -266,7 +273,7 @@ static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots, struct mei_msg_hdr mei_hdr; struct mei_cl *cl = cb->cl; size_t len = cb->request_buffer.size - cb->buf_idx; - size_t msg_slots = mei_data2slots(len); + u32 msg_slots = mei_data2slots(len); mei_hdr.host_addr = cl->host_client_id; mei_hdr.me_addr = cl->me_client_id; @@ -419,8 +426,7 @@ end: * * returns 0 on success, <0 on failure. */ -int mei_irq_write_handler(struct mei_device *dev, - struct mei_cl_cb *cmpl_list) +int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) { struct mei_cl *cl; diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index cb80166161f0..09a2af4294a6 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -374,6 +374,17 @@ static inline unsigned long mei_secs_to_jiffies(unsigned long sec) return msecs_to_jiffies(sec * MSEC_PER_SEC); } +/** + * mei_data2slots - get slots - number of (dwords) from a message length + * + size of the mei header + * @length - size of the messages in bytes + * returns - number of slots + */ +static inline u32 mei_data2slots(size_t length) +{ + return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4); +} + /* * mei init function prototypes -- cgit v1.2.3 From aafae7ecd80181983403de13db0b4895acdc233d Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Mon, 11 Mar 2013 18:27:03 +0200 Subject: mei: add hw start callback This callback wraps up hardware dependent details of the hardware initialization. This callback also contains host ready setting so we can remove host_set_ready callback In ME we switch to waiting on event so we can streamline the initialization flow. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hw-me.c | 45 ++++++++++++++++++++++++++++++++++++--------- drivers/misc/mei/init.c | 16 ++++++++++++++++ drivers/misc/mei/mei_dev.h | 16 ++++++++++------ 3 files changed, 62 insertions(+), 15 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index d21e5a761f2c..df9b43d81eea 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -222,6 +222,38 @@ static bool mei_me_hw_is_ready(struct mei_device *dev) return (hw->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA; } +static int mei_me_hw_ready_wait(struct mei_device *dev) +{ + int err; + if (mei_me_hw_is_ready(dev)) + return 0; + + mutex_unlock(&dev->device_lock); + err = wait_event_interruptible_timeout(dev->wait_hw_ready, + dev->recvd_hw_ready, MEI_INTEROP_TIMEOUT); + mutex_lock(&dev->device_lock); + if (!err && !dev->recvd_hw_ready) { + dev_err(&dev->pdev->dev, + "wait hw ready failed. status = 0x%x\n", err); + return -ETIMEDOUT; + } + + dev->recvd_hw_ready = false; + return 0; +} + +static int mei_me_hw_start(struct mei_device *dev) +{ + int ret = mei_me_hw_ready_wait(dev); + if (ret) + return ret; + dev_dbg(&dev->pdev->dev, "hw is ready\n"); + + mei_me_host_set_ready(dev); + return ret; +} + + /** * mei_hbuf_filled_slots - gets number of device filled buffer slots * @@ -456,14 +488,9 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) if (mei_hw_is_ready(dev)) { dev_dbg(&dev->pdev->dev, "we need to start the dev.\n"); - mei_host_set_ready(dev); - - dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n"); - /* link is established * start sending messages. */ - - dev->dev_state = MEI_DEV_INIT_CLIENTS; + dev->recvd_hw_ready = true; + wake_up_interruptible(&dev->wait_hw_ready); - mei_hbm_start_req(dev); mutex_unlock(&dev->device_lock); return IRQ_HANDLED; } else { @@ -521,12 +548,12 @@ end: } static const struct mei_hw_ops mei_me_hw_ops = { - .host_set_ready = mei_me_host_set_ready, .host_is_ready = mei_me_host_is_ready, .hw_is_ready = mei_me_hw_is_ready, .hw_reset = mei_me_hw_reset, - .hw_config = mei_me_hw_config, + .hw_config = mei_me_hw_config, + .hw_start = mei_me_hw_start, .intr_clear = mei_me_intr_clear, .intr_enable = mei_me_intr_enable, diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 6ec530168afb..fc3d97ce8300 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -22,6 +22,7 @@ #include #include "mei_dev.h" +#include "hbm.h" #include "client.h" const char *mei_dev_state_str(int state) @@ -47,6 +48,7 @@ void mei_device_init(struct mei_device *dev) /* setup our list array */ INIT_LIST_HEAD(&dev->file_list); mutex_init(&dev->device_lock); + init_waitqueue_head(&dev->wait_hw_ready); init_waitqueue_head(&dev->wait_recvd_msg); init_waitqueue_head(&dev->wait_stop_wd); dev->dev_state = MEI_DEV_INITIALIZING; @@ -176,6 +178,20 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) dev_warn(&dev->pdev->dev, "unexpected reset: dev_state = %s\n", mei_dev_state_str(dev->dev_state)); + if (!interrupts_enabled) { + dev_dbg(&dev->pdev->dev, "intr not enabled end of reset\n"); + return; + } + + mei_hw_start(dev); + + dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n"); + /* link is established * start sending messages. */ + + dev->dev_state = MEI_DEV_INIT_CLIENTS; + + mei_hbm_start_req(dev); + /* wake up all readings so they can be interrupted */ mei_cl_all_read_wakeup(dev); diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 09a2af4294a6..5c30857e91d5 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -213,11 +213,11 @@ struct mei_cl { /** struct mei_hw_ops * - * @host_set_ready - notify FW that host side is ready * @host_is_ready - query for host readiness * @hw_is_ready - query if hw is ready * @hw_reset - reset hw + * @hw_start - start hw after reset * @hw_config - configure hw * @intr_clear - clear pending interrupts @@ -237,11 +237,11 @@ struct mei_cl { */ struct mei_hw_ops { - void (*host_set_ready) (struct mei_device *dev); bool (*host_is_ready) (struct mei_device *dev); bool (*hw_is_ready) (struct mei_device *dev); void (*hw_reset) (struct mei_device *dev, bool enable); + int (*hw_start) (struct mei_device *dev); void (*hw_config) (struct mei_device *dev); void (*intr_clear) (struct mei_device *dev); @@ -296,11 +296,14 @@ struct mei_device { */ struct mutex device_lock; /* device lock */ struct delayed_work timer_work; /* MEI timer delayed work (timeouts) */ + + bool recvd_hw_ready; bool recvd_msg; /* * waiting queue for receive message from FW */ + wait_queue_head_t wait_hw_ready; wait_queue_head_t wait_recvd_msg; wait_queue_head_t wait_stop_wd; @@ -465,6 +468,11 @@ static inline void mei_hw_reset(struct mei_device *dev, bool enable) dev->ops->hw_reset(dev, enable); } +static inline void mei_hw_start(struct mei_device *dev) +{ + dev->ops->hw_start(dev); +} + static inline void mei_clear_interrupts(struct mei_device *dev) { dev->ops->intr_clear(dev); @@ -480,10 +488,6 @@ static inline void mei_disable_interrupts(struct mei_device *dev) dev->ops->intr_disable(dev); } -static inline void mei_host_set_ready(struct mei_device *dev) -{ - dev->ops->host_set_ready(dev); -} static inline bool mei_host_is_ready(struct mei_device *dev) { return dev->ops->host_is_ready(dev); -- cgit v1.2.3 From 9f7345b7a7cbf4c78a8161cba21de1772d5ad56e Mon Sep 17 00:00:00 2001 From: Hiroshi Doyu Date: Thu, 14 Mar 2013 11:12:10 +0200 Subject: memory: tegra30: Fix build error w/o PM Make this depend on CONFIG_PM. Signed-off-by: Hiroshi Doyu Reviewed-by: Thierry Reding Signed-off-by: Greg Kroah-Hartman --- drivers/memory/tegra30-mc.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers') diff --git a/drivers/memory/tegra30-mc.c b/drivers/memory/tegra30-mc.c index 0b975986777d..f4ae074badc3 100644 --- a/drivers/memory/tegra30-mc.c +++ b/drivers/memory/tegra30-mc.c @@ -268,6 +268,7 @@ static const u32 tegra30_mc_ctx[] = { MC_INTMASK, }; +#ifdef CONFIG_PM static int tegra30_mc_suspend(struct device *dev) { int i; @@ -291,6 +292,7 @@ static int tegra30_mc_resume(struct device *dev) mc_readl(mc, MC_TIMING_CONTROL); return 0; } +#endif static UNIVERSAL_DEV_PM_OPS(tegra30_mc_pm, tegra30_mc_suspend, -- cgit v1.2.3 From 0c75948249a05ebfa3214aaf5b8247ec919c30ac Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Tue, 5 Mar 2013 11:02:21 +0900 Subject: misc: arm-charlcd: use module_platform_driver_probe() This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han Acked-by: Linus Walleij Acked-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/misc/arm-charlcd.c | 13 +------------ 1 file changed, 1 insertion(+), 12 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/arm-charlcd.c b/drivers/misc/arm-charlcd.c index fe8616a8d287..48651ef0028c 100644 --- a/drivers/misc/arm-charlcd.c +++ b/drivers/misc/arm-charlcd.c @@ -378,18 +378,7 @@ static struct platform_driver charlcd_driver = { .remove = __exit_p(charlcd_remove), }; -static int __init charlcd_init(void) -{ - return platform_driver_probe(&charlcd_driver, charlcd_probe); -} - -static void __exit charlcd_exit(void) -{ - platform_driver_unregister(&charlcd_driver); -} - -module_init(charlcd_init); -module_exit(charlcd_exit); +module_platform_driver_probe(charlcd_driver, charlcd_probe); MODULE_AUTHOR("Linus Walleij "); MODULE_DESCRIPTION("ARM Character LCD Driver"); -- cgit v1.2.3 From 4022ed5a7222a400f813cfecfa5ecca40c708f69 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Tue, 5 Mar 2013 11:03:18 +0900 Subject: misc: atmel_pwm: use module_platform_driver_probe() This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han Acked-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/misc/atmel_pwm.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/atmel_pwm.c b/drivers/misc/atmel_pwm.c index 28f5aaa19d4a..494d0500bda6 100644 --- a/drivers/misc/atmel_pwm.c +++ b/drivers/misc/atmel_pwm.c @@ -393,17 +393,7 @@ static struct platform_driver atmel_pwm_driver = { */ }; -static int __init pwm_init(void) -{ - return platform_driver_probe(&atmel_pwm_driver, pwm_probe); -} -module_init(pwm_init); - -static void __exit pwm_exit(void) -{ - platform_driver_unregister(&atmel_pwm_driver); -} -module_exit(pwm_exit); +module_platform_driver_probe(atmel_pwm_driver, pwm_probe); MODULE_DESCRIPTION("Driver for AT32/AT91 PWM module"); MODULE_LICENSE("GPL"); -- cgit v1.2.3 From ead050dec6b0765357e45287f02ef8e51f69c3ed Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Tue, 5 Mar 2013 11:04:07 +0900 Subject: misc: ep93xx_pwm: use module_platform_driver_probe() This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han Acked-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/misc/ep93xx_pwm.c | 13 +------------ 1 file changed, 1 insertion(+), 12 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/ep93xx_pwm.c b/drivers/misc/ep93xx_pwm.c index 16d7179e2f9b..96787ec15cad 100644 --- a/drivers/misc/ep93xx_pwm.c +++ b/drivers/misc/ep93xx_pwm.c @@ -365,18 +365,7 @@ static struct platform_driver ep93xx_pwm_driver = { .remove = __exit_p(ep93xx_pwm_remove), }; -static int __init ep93xx_pwm_init(void) -{ - return platform_driver_probe(&ep93xx_pwm_driver, ep93xx_pwm_probe); -} - -static void __exit ep93xx_pwm_exit(void) -{ - platform_driver_unregister(&ep93xx_pwm_driver); -} - -module_init(ep93xx_pwm_init); -module_exit(ep93xx_pwm_exit); +module_platform_driver_probe(ep93xx_pwm_driver, ep93xx_pwm_probe); MODULE_AUTHOR("Matthieu Crapet , " "H Hartley Sweeten "); -- cgit v1.2.3 From d87c3f057922e616c0449aac518da200355c84e9 Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Wed, 27 Feb 2013 11:41:41 -0800 Subject: misc/vmw_vmci: Add dependency on CONFIG_NET Building the vmw_vmci driver with CONFIG_NET undefined results in: drivers/built-in.o: In function `__qp_memcpy_from_queue.isra.13': vmci_queue_pair.c:(.text+0x1671a8): undefined reference to `memcpy_toiovec' drivers/built-in.o: In function `__qp_memcpy_to_queue.isra.14': vmci_queue_pair.c:(.text+0x167341): undefined reference to `memcpy_fromiovec' make[1]: [vmlinux] Error 1 (ignored) since memcpy_toiovec and memcpy_fromiovec are defined in the networking code. Add the missing dependency. Signed-off-by: Guenter Roeck Acked-by: Randy Dunlap Signed-off-by: Greg Kroah-Hartman --- drivers/misc/vmw_vmci/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/misc/vmw_vmci/Kconfig b/drivers/misc/vmw_vmci/Kconfig index 39c2ecadb273..ea98f7e9ccd1 100644 --- a/drivers/misc/vmw_vmci/Kconfig +++ b/drivers/misc/vmw_vmci/Kconfig @@ -4,7 +4,7 @@ config VMWARE_VMCI tristate "VMware VMCI Driver" - depends on X86 && PCI + depends on X86 && PCI && NET help This is VMware's Virtual Machine Communication Interface. It enables high-speed communication between host and guest in a virtual -- cgit v1.2.3 From ff9c351f96168a90d5a8239c350b565059e68be1 Mon Sep 17 00:00:00 2001 From: Chen Gang Date: Wed, 27 Feb 2013 13:56:16 +0800 Subject: drivers/misc: beautify code: chip->lux_calib is u16 which will never more than APDS_RANGE APDS_RANGE is 65535, chip->lux_calib is u16 (never more than APDS_RANGE). Signed-off-by: Chen Gang Signed-off-by: Greg Kroah-Hartman --- drivers/misc/apds990x.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/apds990x.c b/drivers/misc/apds990x.c index 0e67f8263cd8..1efb6a4ea397 100644 --- a/drivers/misc/apds990x.c +++ b/drivers/misc/apds990x.c @@ -700,9 +700,6 @@ static ssize_t apds990x_lux_calib_store(struct device *dev, if (strict_strtoul(buf, 0, &value)) return -EINVAL; - if (chip->lux_calib > APDS_RANGE) - return -EINVAL; - chip->lux_calib = value; return len; -- cgit v1.2.3 From 61084d992733e8f87f7278c71cdb93869fad9c17 Mon Sep 17 00:00:00 2001 From: Paul Bolle Date: Fri, 15 Mar 2013 16:24:10 +0100 Subject: misc: Remove max8997-muic.o Makefile line again Commit 20259849bb1ac1ffb0156eb359810e8b99cb644d ("VMCI: Some header and config files.") readded this Makefile line. Remove it again. Signed-off-by: Paul Bolle Signed-off-by: Greg Kroah-Hartman --- drivers/misc/Makefile | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers') diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 35a1463c72d9..3e2faa0939b2 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -49,6 +49,5 @@ obj-y += carma/ obj-$(CONFIG_USB_SWITCH_FSA9480) += fsa9480.o obj-$(CONFIG_ALTERA_STAPL) +=altera-stapl/ obj-$(CONFIG_INTEL_MEI) += mei/ -obj-$(CONFIG_MAX8997_MUIC) += max8997-muic.o obj-$(CONFIG_VMWARE_VMCI) += vmw_vmci/ obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lattice-ecp3-config.o -- cgit v1.2.3 From 7a4541a6591d8b0f6d095ffd94c8ebae75ea57d7 Mon Sep 17 00:00:00 2001 From: Fabio Porcedda Date: Thu, 14 Mar 2013 18:09:35 +0100 Subject: drivers: memory: use module_platform_driver_probe() This patch converts the drivers to use the module_platform_driver_probe() macro which makes the code smaller and a bit simpler. Signed-off-by: Fabio Porcedda Cc: Benoit Cousson Cc: Aneesh V Signed-off-by: Greg Kroah-Hartman --- drivers/memory/emif.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) (limited to 'drivers') diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index df0873694858..ecbc1a996eb6 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -1841,18 +1841,8 @@ static struct platform_driver emif_driver = { }, }; -static int __init_or_module emif_register(void) -{ - return platform_driver_probe(&emif_driver, emif_probe); -} - -static void __exit emif_unregister(void) -{ - platform_driver_unregister(&emif_driver); -} +module_platform_driver_probe(emif_driver, emif_probe); -module_init(emif_register); -module_exit(emif_unregister); MODULE_DESCRIPTION("TI EMIF SDRAM Controller Driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:emif"); -- cgit v1.2.3 From 3334948428c6370d664099cdcdfd4b487191293d Mon Sep 17 00:00:00 2001 From: Zhang Yanfei Date: Tue, 12 Mar 2013 13:10:40 +0800 Subject: driver: hv: remove cast for kmalloc return value remove cast for kmalloc return value. Signed-off-by: Zhang Yanfei Cc: "K. Y. Srinivasan" Cc: Haiyang Zhang Cc: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 731158910c1e..ae4923756d98 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -289,9 +289,8 @@ void hv_synic_init(void *arg) /* Check the version */ rdmsrl(HV_X64_MSR_SVERSION, version); - hv_context.event_dpc[cpu] = (struct tasklet_struct *) - kmalloc(sizeof(struct tasklet_struct), - GFP_ATOMIC); + hv_context.event_dpc[cpu] = kmalloc(sizeof(struct tasklet_struct), + GFP_ATOMIC); if (hv_context.event_dpc[cpu] == NULL) { pr_err("Unable to allocate event dpc\n"); goto cleanup; -- cgit v1.2.3 From 7a64b864a0989302b5f6869f8b65b630b10bd9db Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 15 Mar 2013 12:25:39 -0700 Subject: Drivers: hv: balloon: Do not request completion notification There is no need to request completion notification; get rid of it. Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_balloon.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 37873213e24f..7fb72dd05ba2 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -962,8 +962,7 @@ static int balloon_probe(struct hv_device *dev, ret = vmbus_sendpacket(dev->channel, &version_req, sizeof(struct dm_version_request), (unsigned long)NULL, - VM_PKT_DATA_INBAND, - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); + VM_PKT_DATA_INBAND, 0); if (ret) goto probe_error2; @@ -1009,8 +1008,7 @@ static int balloon_probe(struct hv_device *dev, ret = vmbus_sendpacket(dev->channel, &cap_msg, sizeof(struct dm_capabilities), (unsigned long)NULL, - VM_PKT_DATA_INBAND, - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); + VM_PKT_DATA_INBAND, 0); if (ret) goto probe_error2; -- cgit v1.2.3 From 6571b2dab4eb6c7061160490db984dbc01e5626d Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 15 Mar 2013 12:25:40 -0700 Subject: Drivers: hv: balloon: Execute balloon inflation in a separate context Execute the balloon inflation operation in a separate work context. This allows us to decouple the pressure reporting activity from the ballooning activity. Testing has shown that this decoupling makes the guest more reponsive. Signed-off-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_balloon.c | 34 ++++++++++++++++++++++++---------- 1 file changed, 24 insertions(+), 10 deletions(-) (limited to 'drivers') diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 7fb72dd05ba2..8dc406ccf10f 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -412,6 +412,11 @@ struct dm_info_msg { * End protocol definitions. */ +struct balloon_state { + __u32 num_pages; + struct work_struct wrk; +}; + static bool hot_add; static bool do_hot_add; /* @@ -459,7 +464,12 @@ struct hv_dynmem_device { unsigned int num_pages_ballooned; /* - * This thread handles both balloon/hot-add + * State to manage the ballooning (up) operation. + */ + struct balloon_state balloon_wrk; + + /* + * This thread handles hot-add * requests from the host as well as notifying * the host with regards to memory pressure in * the guest. @@ -657,9 +667,9 @@ static int alloc_balloon_pages(struct hv_dynmem_device *dm, int num_pages, -static void balloon_up(struct hv_dynmem_device *dm, struct dm_balloon *req) +static void balloon_up(struct work_struct *dummy) { - int num_pages = req->num_pages; + int num_pages = dm_device.balloon_wrk.num_pages; int num_ballooned = 0; struct dm_balloon_response *bl_resp; int alloc_unit; @@ -684,14 +694,14 @@ static void balloon_up(struct hv_dynmem_device *dm, struct dm_balloon *req) num_pages -= num_ballooned; - num_ballooned = alloc_balloon_pages(dm, num_pages, + num_ballooned = alloc_balloon_pages(&dm_device, num_pages, bl_resp, alloc_unit, &alloc_error); if ((alloc_error) || (num_ballooned == num_pages)) { bl_resp->more_pages = 0; done = true; - dm->state = DM_INITIALIZED; + dm_device.state = DM_INITIALIZED; } /* @@ -719,7 +729,7 @@ static void balloon_up(struct hv_dynmem_device *dm, struct dm_balloon *req) pr_info("Balloon response failed\n"); for (i = 0; i < bl_resp->range_count; i++) - free_balloon_pages(dm, + free_balloon_pages(&dm_device, &bl_resp->range_array[i]); done = true; @@ -775,9 +785,6 @@ static int dm_thread_func(void *dm_dev) scan_start = jiffies; switch (dm->state) { - case DM_BALLOON_UP: - balloon_up(dm, (struct dm_balloon *)recv_buffer); - break; case DM_HOT_ADD: hot_add_req(dm, (struct dm_hot_add *)recv_buffer); @@ -861,6 +868,7 @@ static void balloon_onchannelcallback(void *context) struct dm_message *dm_msg; struct dm_header *dm_hdr; struct hv_dynmem_device *dm = hv_get_drvdata(dev); + struct dm_balloon *bal_msg; memset(recv_buffer, 0, sizeof(recv_buffer)); vmbus_recvpacket(dev->channel, recv_buffer, @@ -882,8 +890,12 @@ static void balloon_onchannelcallback(void *context) break; case DM_BALLOON_REQUEST: + if (dm->state == DM_BALLOON_UP) + pr_warn("Currently ballooning\n"); + bal_msg = (struct dm_balloon *)recv_buffer; dm->state = DM_BALLOON_UP; - complete(&dm->config_event); + dm_device.balloon_wrk.num_pages = bal_msg->num_pages; + schedule_work(&dm_device.balloon_wrk.wrk); break; case DM_UNBALLOON_REQUEST: @@ -937,6 +949,7 @@ static int balloon_probe(struct hv_device *dev, dm_device.next_version = DYNMEM_PROTOCOL_VERSION_WIN7; init_completion(&dm_device.host_event); init_completion(&dm_device.config_event); + INIT_WORK(&dm_device.balloon_wrk.wrk, balloon_up); dm_device.thread = kthread_run(dm_thread_func, &dm_device, "hv_balloon"); @@ -1048,6 +1061,7 @@ static int balloon_remove(struct hv_device *dev) if (dm->num_pages_ballooned != 0) pr_warn("Ballooned pages: %d\n", dm->num_pages_ballooned); + cancel_work_sync(&dm->balloon_wrk.wrk); vmbus_close(dev->channel); kthread_stop(dm->thread); kfree(send_buffer); -- cgit v1.2.3 From c51af826cf062af3c49a99a05a33236d93c57e72 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 15 Mar 2013 12:25:41 -0700 Subject: Drivers: hv: balloon: Execute hot-add code in a separate context Execute the hot-add operation in a separate work context. This allows us to decouple the pressure reporting activity from the "hot-add" activity. Testing has shown that this makes the guest more responsive to hot add requests. Signed-off-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_balloon.c | 41 +++++++++++++++++++++++------------------ 1 file changed, 23 insertions(+), 18 deletions(-) (limited to 'drivers') diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 8dc406ccf10f..13fda3807bfb 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -417,6 +417,11 @@ struct balloon_state { struct work_struct wrk; }; +struct hot_add_wrk { + union dm_mem_page_range ha_page_range; + struct work_struct wrk; +}; + static bool hot_add; static bool do_hot_add; /* @@ -468,6 +473,11 @@ struct hv_dynmem_device { */ struct balloon_state balloon_wrk; + /* + * State to execute the "hot-add" operation. + */ + struct hot_add_wrk ha_wrk; + /* * This thread handles hot-add * requests from the host as well as notifying @@ -486,7 +496,7 @@ struct hv_dynmem_device { static struct hv_dynmem_device dm_device; -static void hot_add_req(struct hv_dynmem_device *dm, struct dm_hot_add *msg) +static void hot_add_req(struct work_struct *dummy) { struct dm_hot_add_response resp; @@ -509,8 +519,8 @@ static void hot_add_req(struct hv_dynmem_device *dm, struct dm_hot_add *msg) resp.page_count = 0; resp.result = 0; - dm->state = DM_INITIALIZED; - vmbus_sendpacket(dm->dev->channel, &resp, + dm_device.state = DM_INITIALIZED; + vmbus_sendpacket(dm_device.dev->channel, &resp, sizeof(struct dm_hot_add_response), (unsigned long)NULL, VM_PKT_DATA_INBAND, 0); @@ -771,7 +781,6 @@ static int dm_thread_func(void *dm_dev) { struct hv_dynmem_device *dm = dm_dev; int t; - unsigned long scan_start; while (!kthread_should_stop()) { t = wait_for_completion_timeout(&dm_device.config_event, 1*HZ); @@ -783,19 +792,6 @@ static int dm_thread_func(void *dm_dev) if (t == 0) post_status(dm); - scan_start = jiffies; - switch (dm->state) { - - case DM_HOT_ADD: - hot_add_req(dm, (struct dm_hot_add *)recv_buffer); - break; - default: - break; - } - - if (!time_in_range(jiffies, scan_start, scan_start + HZ)) - post_status(dm); - } return 0; @@ -869,6 +865,8 @@ static void balloon_onchannelcallback(void *context) struct dm_header *dm_hdr; struct hv_dynmem_device *dm = hv_get_drvdata(dev); struct dm_balloon *bal_msg; + struct dm_hot_add *ha_msg; + union dm_mem_page_range *ha_pg_range; memset(recv_buffer, 0, sizeof(recv_buffer)); vmbus_recvpacket(dev->channel, recv_buffer, @@ -905,8 +903,13 @@ static void balloon_onchannelcallback(void *context) break; case DM_MEM_HOT_ADD_REQUEST: + if (dm->state == DM_HOT_ADD) + pr_warn("Currently hot-adding\n"); dm->state = DM_HOT_ADD; - complete(&dm->config_event); + ha_msg = (struct dm_hot_add *)recv_buffer; + ha_pg_range = &ha_msg->range; + dm_device.ha_wrk.ha_page_range = *ha_pg_range; + schedule_work(&dm_device.ha_wrk.wrk); break; case DM_INFO_MESSAGE: @@ -950,6 +953,7 @@ static int balloon_probe(struct hv_device *dev, init_completion(&dm_device.host_event); init_completion(&dm_device.config_event); INIT_WORK(&dm_device.balloon_wrk.wrk, balloon_up); + INIT_WORK(&dm_device.ha_wrk.wrk, hot_add_req); dm_device.thread = kthread_run(dm_thread_func, &dm_device, "hv_balloon"); @@ -1062,6 +1066,7 @@ static int balloon_remove(struct hv_device *dev) pr_warn("Ballooned pages: %d\n", dm->num_pages_ballooned); cancel_work_sync(&dm->balloon_wrk.wrk); + cancel_work_sync(&dm->ha_wrk.wrk); vmbus_close(dev->channel); kthread_stop(dm->thread); kfree(send_buffer); -- cgit v1.2.3 From 0cf40a3e661b09c0dda795a77ccc0402c3153859 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 15 Mar 2013 12:25:42 -0700 Subject: Drivers: hv: balloon: Make the balloon driver not unloadable The balloon driver is stateful. For instance, it needs to keep track of pages that have been ballooned out to properly post pressure reports. This state cannot be re-constructed if the driver were to be unloaded and subsequently loaded. Furthermore, as we support memory hot-add as part of this driver, this driver becomes even more stateful and this state cannot be re-created. Make the balloon driver unloadable to deal with this issue. Signed-off-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_balloon.c | 7 ------- 1 file changed, 7 deletions(-) (limited to 'drivers') diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 13fda3807bfb..4743db9e5f34 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1096,14 +1096,7 @@ static int __init init_balloon_drv(void) return vmbus_driver_register(&balloon_drv); } -static void exit_balloon_drv(void) -{ - - vmbus_driver_unregister(&balloon_drv); -} - module_init(init_balloon_drv); -module_exit(exit_balloon_drv); MODULE_DESCRIPTION("Hyper-V Balloon"); MODULE_VERSION(HV_DRV_VERSION); -- cgit v1.2.3 From 1cac8cd4d146b60a7c70d778b5be928281b3b551 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 15 Mar 2013 12:25:43 -0700 Subject: Drivers: hv: balloon: Implement hot-add functionality Implement the memory hot-add functionality. With this, Linux guests can fully participate in the Dynamic Memory protocol implemented in the Windows hosts. In this version of the patch, based Olaf Herring's feedback, I have gotten rid of the module level dependency on MEMORY_HOTPLUG. Instead the code within the driver that depends on MEMORY_HOTPLUG has the appropriate compilation switches. This would allow this driver to support pure ballooning in cases where the kernel does not support memory hotplug. Signed-off-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_balloon.c | 408 +++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 387 insertions(+), 21 deletions(-) (limited to 'drivers') diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 4743db9e5f34..2cf7d4e964bd 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -412,6 +412,27 @@ struct dm_info_msg { * End protocol definitions. */ +/* + * State to manage hot adding memory into the guest. + * The range start_pfn : end_pfn specifies the range + * that the host has asked us to hot add. The range + * start_pfn : ha_end_pfn specifies the range that we have + * currently hot added. We hot add in multiples of 128M + * chunks; it is possible that we may not be able to bring + * online all the pages in the region. The range + * covered_start_pfn : covered_end_pfn defines the pages that can + * be brough online. + */ + +struct hv_hotadd_state { + struct list_head list; + unsigned long start_pfn; + unsigned long covered_start_pfn; + unsigned long covered_end_pfn; + unsigned long ha_end_pfn; + unsigned long end_pfn; +}; + struct balloon_state { __u32 num_pages; struct work_struct wrk; @@ -419,16 +440,17 @@ struct balloon_state { struct hot_add_wrk { union dm_mem_page_range ha_page_range; + union dm_mem_page_range ha_region_range; struct work_struct wrk; }; -static bool hot_add; +static bool hot_add = true; static bool do_hot_add; /* * Delay reporting memory pressure by * the specified number of seconds. */ -static uint pressure_report_delay = 30; +static uint pressure_report_delay = 45; module_param(hot_add, bool, (S_IRUGO | S_IWUSR)); MODULE_PARM_DESC(hot_add, "If set attempt memory hot_add"); @@ -456,6 +478,7 @@ enum hv_dm_state { static __u8 recv_buffer[PAGE_SIZE]; static __u8 *send_buffer; #define PAGES_IN_2M 512 +#define HA_CHUNK (32 * 1024) struct hv_dynmem_device { struct hv_device *dev; @@ -478,6 +501,17 @@ struct hv_dynmem_device { */ struct hot_add_wrk ha_wrk; + /* + * This state tracks if the host has specified a hot-add + * region. + */ + bool host_specified_ha_region; + + /* + * State to synchronize hot-add. + */ + struct completion ol_waitevent; + bool ha_waiting; /* * This thread handles hot-add * requests from the host as well as notifying @@ -486,6 +520,11 @@ struct hv_dynmem_device { */ struct task_struct *thread; + /* + * A list of hot-add regions. + */ + struct list_head ha_region_list; + /* * We start with the highest version we can support * and downgrade based on the host; we save here the @@ -496,35 +535,329 @@ struct hv_dynmem_device { static struct hv_dynmem_device dm_device; -static void hot_add_req(struct work_struct *dummy) +#ifdef CONFIG_MEMORY_HOTPLUG + +void hv_bring_pgs_online(unsigned long start_pfn, unsigned long size) { + int i; - struct dm_hot_add_response resp; + for (i = 0; i < size; i++) { + struct page *pg; + pg = pfn_to_page(start_pfn + i); + __online_page_set_limits(pg); + __online_page_increment_counters(pg); + __online_page_free(pg); + } +} + +static void hv_mem_hot_add(unsigned long start, unsigned long size, + unsigned long pfn_count, + struct hv_hotadd_state *has) +{ + int ret = 0; + int i, nid, t; + unsigned long start_pfn; + unsigned long processed_pfn; + unsigned long total_pfn = pfn_count; + + for (i = 0; i < (size/HA_CHUNK); i++) { + start_pfn = start + (i * HA_CHUNK); + has->ha_end_pfn += HA_CHUNK; + + if (total_pfn > HA_CHUNK) { + processed_pfn = HA_CHUNK; + total_pfn -= HA_CHUNK; + } else { + processed_pfn = total_pfn; + total_pfn = 0; + } + + has->covered_end_pfn += processed_pfn; - if (do_hot_add) { + init_completion(&dm_device.ol_waitevent); + dm_device.ha_waiting = true; - pr_info("Memory hot add not supported\n"); + nid = memory_add_physaddr_to_nid(PFN_PHYS(start_pfn)); + ret = add_memory(nid, PFN_PHYS((start_pfn)), + (HA_CHUNK << PAGE_SHIFT)); + + if (ret) { + pr_info("hot_add memory failed error is %d\n", ret); + has->ha_end_pfn -= HA_CHUNK; + has->covered_end_pfn -= processed_pfn; + break; + } /* - * Currently we do not support hot add. - * Just fail the request. + * Wait for the memory block to be onlined. */ + t = wait_for_completion_timeout(&dm_device.ol_waitevent, 5*HZ); + if (t == 0) { + pr_info("hot_add memory timedout\n"); + has->ha_end_pfn -= HA_CHUNK; + has->covered_end_pfn -= processed_pfn; + break; + } + } + return; +} + +static void hv_online_page(struct page *pg) +{ + struct list_head *cur; + struct hv_hotadd_state *has; + unsigned long cur_start_pgp; + unsigned long cur_end_pgp; + + if (dm_device.ha_waiting) { + dm_device.ha_waiting = false; + complete(&dm_device.ol_waitevent); + } + + list_for_each(cur, &dm_device.ha_region_list) { + has = list_entry(cur, struct hv_hotadd_state, list); + cur_start_pgp = (unsigned long) + pfn_to_page(has->covered_start_pfn); + cur_end_pgp = (unsigned long)pfn_to_page(has->covered_end_pfn); + + if (((unsigned long)pg >= cur_start_pgp) && + ((unsigned long)pg < cur_end_pgp)) { + /* + * This frame is currently backed; online the + * page. + */ + __online_page_set_limits(pg); + __online_page_increment_counters(pg); + __online_page_free(pg); + has->covered_start_pfn++; + } + } +} + +static bool pfn_covered(unsigned long start_pfn, unsigned long pfn_cnt) +{ + struct list_head *cur; + struct hv_hotadd_state *has; + unsigned long residual, new_inc; + + if (list_empty(&dm_device.ha_region_list)) + return false; + + list_for_each(cur, &dm_device.ha_region_list) { + has = list_entry(cur, struct hv_hotadd_state, list); + + /* + * If the pfn range we are dealing with is not in the current + * "hot add block", move on. + */ + if ((start_pfn >= has->end_pfn)) + continue; + /* + * If the current hot add-request extends beyond + * our current limit; extend it. + */ + if ((start_pfn + pfn_cnt) > has->end_pfn) { + residual = (start_pfn + pfn_cnt - has->end_pfn); + /* + * Extend the region by multiples of HA_CHUNK. + */ + new_inc = (residual / HA_CHUNK) * HA_CHUNK; + if (residual % HA_CHUNK) + new_inc += HA_CHUNK; + + has->end_pfn += new_inc; + } + + /* + * If the current start pfn is not where the covered_end + * is, update it. + */ + + if (has->covered_end_pfn != start_pfn) { + has->covered_end_pfn = start_pfn; + has->covered_start_pfn = start_pfn; + } + return true; + + } + + return false; +} + +static unsigned long handle_pg_range(unsigned long pg_start, + unsigned long pg_count) +{ + unsigned long start_pfn = pg_start; + unsigned long pfn_cnt = pg_count; + unsigned long size; + struct list_head *cur; + struct hv_hotadd_state *has; + unsigned long pgs_ol = 0; + unsigned long old_covered_state; + + if (list_empty(&dm_device.ha_region_list)) + return 0; + + list_for_each(cur, &dm_device.ha_region_list) { + has = list_entry(cur, struct hv_hotadd_state, list); + + /* + * If the pfn range we are dealing with is not in the current + * "hot add block", move on. + */ + if ((start_pfn >= has->end_pfn)) + continue; + + old_covered_state = has->covered_end_pfn; + + if (start_pfn < has->ha_end_pfn) { + /* + * This is the case where we are backing pages + * in an already hot added region. Bring + * these pages online first. + */ + pgs_ol = has->ha_end_pfn - start_pfn; + if (pgs_ol > pfn_cnt) + pgs_ol = pfn_cnt; + hv_bring_pgs_online(start_pfn, pgs_ol); + has->covered_end_pfn += pgs_ol; + has->covered_start_pfn += pgs_ol; + pfn_cnt -= pgs_ol; + } + + if ((has->ha_end_pfn < has->end_pfn) && (pfn_cnt > 0)) { + /* + * We have some residual hot add range + * that needs to be hot added; hot add + * it now. Hot add a multiple of + * of HA_CHUNK that fully covers the pages + * we have. + */ + size = (has->end_pfn - has->ha_end_pfn); + if (pfn_cnt <= size) { + size = ((pfn_cnt / HA_CHUNK) * HA_CHUNK); + if (pfn_cnt % HA_CHUNK) + size += HA_CHUNK; + } else { + pfn_cnt = size; + } + hv_mem_hot_add(has->ha_end_pfn, size, pfn_cnt, has); + } + /* + * If we managed to online any pages that were given to us, + * we declare success. + */ + return has->covered_end_pfn - old_covered_state; + + } + + return 0; +} + +static unsigned long process_hot_add(unsigned long pg_start, + unsigned long pfn_cnt, + unsigned long rg_start, + unsigned long rg_size) +{ + struct hv_hotadd_state *ha_region = NULL; + + if (pfn_cnt == 0) + return 0; + + if (!dm_device.host_specified_ha_region) + if (pfn_covered(pg_start, pfn_cnt)) + goto do_pg_range; + + /* + * If the host has specified a hot-add range; deal with it first. + */ + + if ((rg_size != 0) && (!dm_device.host_specified_ha_region)) { + ha_region = kzalloc(sizeof(struct hv_hotadd_state), GFP_KERNEL); + if (!ha_region) + return 0; + + INIT_LIST_HEAD(&ha_region->list); + + list_add_tail(&ha_region->list, &dm_device.ha_region_list); + ha_region->start_pfn = rg_start; + ha_region->ha_end_pfn = rg_start; + ha_region->covered_start_pfn = pg_start; + ha_region->covered_end_pfn = pg_start; + ha_region->end_pfn = rg_start + rg_size; + } + +do_pg_range: + /* + * Process the page range specified; bringing them + * online if possible. + */ + return handle_pg_range(pg_start, pfn_cnt); +} + +#endif + +static void hot_add_req(struct work_struct *dummy) +{ + struct dm_hot_add_response resp; +#ifdef CONFIG_MEMORY_HOTPLUG + unsigned long pg_start, pfn_cnt; + unsigned long rg_start, rg_sz; +#endif + struct hv_dynmem_device *dm = &dm_device; + memset(&resp, 0, sizeof(struct dm_hot_add_response)); resp.hdr.type = DM_MEM_HOT_ADD_RESPONSE; resp.hdr.size = sizeof(struct dm_hot_add_response); resp.hdr.trans_id = atomic_inc_return(&trans_id); - resp.page_count = 0; - resp.result = 0; +#ifdef CONFIG_MEMORY_HOTPLUG + pg_start = dm->ha_wrk.ha_page_range.finfo.start_page; + pfn_cnt = dm->ha_wrk.ha_page_range.finfo.page_cnt; - dm_device.state = DM_INITIALIZED; - vmbus_sendpacket(dm_device.dev->channel, &resp, + rg_start = dm->ha_wrk.ha_region_range.finfo.start_page; + rg_sz = dm->ha_wrk.ha_region_range.finfo.page_cnt; + + if ((rg_start == 0) && (!dm->host_specified_ha_region)) { + unsigned long region_size; + unsigned long region_start; + + /* + * The host has not specified the hot-add region. + * Based on the hot-add page range being specified, + * compute a hot-add region that can cover the pages + * that need to be hot-added while ensuring the alignment + * and size requirements of Linux as it relates to hot-add. + */ + region_start = pg_start; + region_size = (pfn_cnt / HA_CHUNK) * HA_CHUNK; + if (pfn_cnt % HA_CHUNK) + region_size += HA_CHUNK; + + region_start = (pg_start / HA_CHUNK) * HA_CHUNK; + + rg_start = region_start; + rg_sz = region_size; + } + + resp.page_count = process_hot_add(pg_start, pfn_cnt, + rg_start, rg_sz); +#endif + if (resp.page_count > 0) + resp.result = 1; + else + resp.result = 0; + + if (!do_hot_add || (resp.page_count == 0)) + pr_info("Memory hot add failed\n"); + + dm->state = DM_INITIALIZED; + vmbus_sendpacket(dm->dev->channel, &resp, sizeof(struct dm_hot_add_response), (unsigned long)NULL, VM_PKT_DATA_INBAND, 0); - } static void process_info(struct hv_dynmem_device *dm, struct dm_info_msg *msg) @@ -867,6 +1200,7 @@ static void balloon_onchannelcallback(void *context) struct dm_balloon *bal_msg; struct dm_hot_add *ha_msg; union dm_mem_page_range *ha_pg_range; + union dm_mem_page_range *ha_region; memset(recv_buffer, 0, sizeof(recv_buffer)); vmbus_recvpacket(dev->channel, recv_buffer, @@ -907,8 +1241,26 @@ static void balloon_onchannelcallback(void *context) pr_warn("Currently hot-adding\n"); dm->state = DM_HOT_ADD; ha_msg = (struct dm_hot_add *)recv_buffer; - ha_pg_range = &ha_msg->range; - dm_device.ha_wrk.ha_page_range = *ha_pg_range; + if (ha_msg->hdr.size == sizeof(struct dm_hot_add)) { + /* + * This is a normal hot-add request specifying + * hot-add memory. + */ + ha_pg_range = &ha_msg->range; + dm->ha_wrk.ha_page_range = *ha_pg_range; + dm->ha_wrk.ha_region_range.page_range = 0; + } else { + /* + * Host is specifying that we first hot-add + * a region and then partially populate this + * region. + */ + dm->host_specified_ha_region = true; + ha_pg_range = &ha_msg->range; + ha_region = &ha_pg_range[1]; + dm->ha_wrk.ha_page_range = *ha_pg_range; + dm->ha_wrk.ha_region_range = *ha_region; + } schedule_work(&dm_device.ha_wrk.wrk); break; @@ -952,8 +1304,10 @@ static int balloon_probe(struct hv_device *dev, dm_device.next_version = DYNMEM_PROTOCOL_VERSION_WIN7; init_completion(&dm_device.host_event); init_completion(&dm_device.config_event); + INIT_LIST_HEAD(&dm_device.ha_region_list); INIT_WORK(&dm_device.balloon_wrk.wrk, balloon_up); INIT_WORK(&dm_device.ha_wrk.wrk, hot_add_req); + dm_device.host_specified_ha_region = false; dm_device.thread = kthread_run(dm_thread_func, &dm_device, "hv_balloon"); @@ -962,6 +1316,10 @@ static int balloon_probe(struct hv_device *dev, goto probe_error1; } +#ifdef CONFIG_MEMORY_HOTPLUG + set_online_page_callback(&hv_online_page); +#endif + hv_set_drvdata(dev, &dm_device); /* * Initiate the hand shake with the host and negotiate @@ -1006,12 +1364,6 @@ static int balloon_probe(struct hv_device *dev, cap_msg.hdr.trans_id = atomic_inc_return(&trans_id); cap_msg.caps.cap_bits.balloon = 1; - /* - * While we currently don't support hot-add, - * we still advertise this capability since the - * host requires that guests partcipating in the - * dynamic memory protocol support hot add. - */ cap_msg.caps.cap_bits.hot_add = 1; /* @@ -1049,6 +1401,9 @@ static int balloon_probe(struct hv_device *dev, return 0; probe_error2: +#ifdef CONFIG_MEMORY_HOTPLUG + restore_online_page_callback(&hv_online_page); +#endif kthread_stop(dm_device.thread); probe_error1: @@ -1061,15 +1416,26 @@ probe_error0: static int balloon_remove(struct hv_device *dev) { struct hv_dynmem_device *dm = hv_get_drvdata(dev); + struct list_head *cur, *tmp; + struct hv_hotadd_state *has; if (dm->num_pages_ballooned != 0) pr_warn("Ballooned pages: %d\n", dm->num_pages_ballooned); cancel_work_sync(&dm->balloon_wrk.wrk); cancel_work_sync(&dm->ha_wrk.wrk); + vmbus_close(dev->channel); kthread_stop(dm->thread); kfree(send_buffer); +#ifdef CONFIG_MEMORY_HOTPLUG + restore_online_page_callback(&hv_online_page); +#endif + list_for_each_safe(cur, tmp, &dm->ha_region_list) { + has = list_entry(cur, struct hv_hotadd_state, list); + list_del(&has->list); + kfree(has); + } return 0; } -- cgit v1.2.3 From c87059793dd02390b504b0292bdb024ffd68b822 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 15 Mar 2013 12:25:44 -0700 Subject: Drivers: hv: vmbus: Handle channel rescind message correctly Properly cleanup the channel state on receipt of the "offer rescind" message. Starting with ws2012, the host requires that the channel "relid" be properly cleaned up when the offer is rescinded. Signed-off-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang Signed-off-by: Greg Kroah-Hartman --- drivers/hv/channel_mgmt.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers') diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index ff1be167eb04..bad8128b283a 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -165,8 +165,19 @@ static void vmbus_process_rescind_offer(struct work_struct *work) struct vmbus_channel *channel = container_of(work, struct vmbus_channel, work); + unsigned long flags; + struct vmbus_channel_relid_released msg; vmbus_device_unregister(channel->device_obj); + memset(&msg, 0, sizeof(struct vmbus_channel_relid_released)); + msg.child_relid = channel->offermsg.child_relid; + msg.header.msgtype = CHANNELMSG_RELID_RELEASED; + vmbus_post_msg(&msg, sizeof(struct vmbus_channel_relid_released)); + + spin_lock_irqsave(&vmbus_connection.channel_lock, flags); + list_del(&channel->listentry); + spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); + free_channel(channel); } void vmbus_free_channels(void) -- cgit v1.2.3 From 96dd86fa588169b745a71aedf2070e80f4943623 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 15 Mar 2013 12:30:06 -0700 Subject: Drivers: hv: Add a new driver to support host initiated backup This driver supports host initiated backup of the guest. On Windows guests, the host can generate application consistent backups using the Windows VSS framework. On Linux, we ensure that the backup will be file system consistent. This driver allows the host to initiate a "Freeze" operation on all the mounted file systems in the guest. Once the mounted file systems in the guest are frozen, the host snapshots the guest's file systems. Once this is done, the guest's file systems are "thawed". This driver has a user-level component (daemon) that invokes the appropriate operation on all the mounted file systems in response to the requests from the host. The duration for which the guest is frozen is very short - a few seconds. During this interval, the diff disk is comitted. In this version of the patch I have addressed the feedback from Olaf Herring. Also, some of the connector related issues have been fixed. Signed-off-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang Cc: Evgeniy Polyakov Signed-off-by: Greg Kroah-Hartman --- drivers/hv/Makefile | 2 +- drivers/hv/hv_snapshot.c | 287 +++++++++++++++++++++++++++++++++++++++++ drivers/hv/hv_util.c | 10 ++ include/linux/hyperv.h | 69 ++++++++++ include/uapi/linux/connector.h | 5 +- tools/hv/hv_vss_daemon.c | 220 +++++++++++++++++++++++++++++++ 6 files changed, 591 insertions(+), 2 deletions(-) create mode 100644 drivers/hv/hv_snapshot.c create mode 100644 tools/hv/hv_vss_daemon.c (limited to 'drivers') diff --git a/drivers/hv/Makefile b/drivers/hv/Makefile index e6abfa02d8b7..0a74b5661186 100644 --- a/drivers/hv/Makefile +++ b/drivers/hv/Makefile @@ -5,4 +5,4 @@ obj-$(CONFIG_HYPERV_BALLOON) += hv_balloon.o hv_vmbus-y := vmbus_drv.o \ hv.o connection.o channel.o \ channel_mgmt.o ring_buffer.o -hv_utils-y := hv_util.o hv_kvp.o +hv_utils-y := hv_util.o hv_kvp.o hv_snapshot.o diff --git a/drivers/hv/hv_snapshot.c b/drivers/hv/hv_snapshot.c new file mode 100644 index 000000000000..8ad5653ce447 --- /dev/null +++ b/drivers/hv/hv_snapshot.c @@ -0,0 +1,287 @@ +/* + * An implementation of host initiated guest snapshot. + * + * + * Copyright (C) 2013, Microsoft, Inc. + * Author : K. Y. Srinivasan + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + * + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include + + + +/* + * Global state maintained for transaction that is being processed. + * Note that only one transaction can be active at any point in time. + * + * This state is set when we receive a request from the host; we + * cleanup this state when the transaction is completed - when we respond + * to the host with the key value. + */ + +static struct { + bool active; /* transaction status - active or not */ + int recv_len; /* number of bytes received. */ + struct vmbus_channel *recv_channel; /* chn we got the request */ + u64 recv_req_id; /* request ID. */ + struct hv_vss_msg *msg; /* current message */ +} vss_transaction; + + +static void vss_respond_to_host(int error); + +static struct cb_id vss_id = { CN_VSS_IDX, CN_VSS_VAL }; +static const char vss_name[] = "vss_kernel_module"; +static __u8 *recv_buffer; + +static void vss_send_op(struct work_struct *dummy); +static DECLARE_WORK(vss_send_op_work, vss_send_op); + +/* + * Callback when data is received from user mode. + */ + +static void +vss_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) +{ + struct hv_vss_msg *vss_msg; + + vss_msg = (struct hv_vss_msg *)msg->data; + + if (vss_msg->vss_hdr.operation == VSS_OP_REGISTER) { + pr_info("VSS daemon registered\n"); + vss_transaction.active = false; + if (vss_transaction.recv_channel != NULL) + hv_vss_onchannelcallback(vss_transaction.recv_channel); + return; + + } + vss_respond_to_host(vss_msg->error); +} + + +static void vss_send_op(struct work_struct *dummy) +{ + int op = vss_transaction.msg->vss_hdr.operation; + struct cn_msg *msg; + struct hv_vss_msg *vss_msg; + + msg = kzalloc(sizeof(*msg) + sizeof(*vss_msg), GFP_ATOMIC); + if (!msg) + return; + + vss_msg = (struct hv_vss_msg *)msg->data; + + msg->id.idx = CN_VSS_IDX; + msg->id.val = CN_VSS_VAL; + + vss_msg->vss_hdr.operation = op; + msg->len = sizeof(struct hv_vss_msg); + + cn_netlink_send(msg, 0, GFP_ATOMIC); + kfree(msg); + + return; +} + +/* + * Send a response back to the host. + */ + +static void +vss_respond_to_host(int error) +{ + struct icmsg_hdr *icmsghdrp; + u32 buf_len; + struct vmbus_channel *channel; + u64 req_id; + + /* + * If a transaction is not active; log and return. + */ + + if (!vss_transaction.active) { + /* + * This is a spurious call! + */ + pr_warn("VSS: Transaction not active\n"); + return; + } + /* + * Copy the global state for completing the transaction. Note that + * only one transaction can be active at a time. + */ + + buf_len = vss_transaction.recv_len; + channel = vss_transaction.recv_channel; + req_id = vss_transaction.recv_req_id; + vss_transaction.active = false; + + icmsghdrp = (struct icmsg_hdr *) + &recv_buffer[sizeof(struct vmbuspipe_hdr)]; + + if (channel->onchannel_callback == NULL) + /* + * We have raced with util driver being unloaded; + * silently return. + */ + return; + + icmsghdrp->status = error; + + icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; + + vmbus_sendpacket(channel, recv_buffer, buf_len, req_id, + VM_PKT_DATA_INBAND, 0); + +} + +/* + * This callback is invoked when we get a VSS message from the host. + * The host ensures that only one VSS transaction can be active at a time. + */ + +void hv_vss_onchannelcallback(void *context) +{ + struct vmbus_channel *channel = context; + u32 recvlen; + u64 requestid; + struct hv_vss_msg *vss_msg; + + + struct icmsg_hdr *icmsghdrp; + struct icmsg_negotiate *negop = NULL; + + if (vss_transaction.active) { + /* + * We will defer processing this callback once + * the current transaction is complete. + */ + vss_transaction.recv_channel = channel; + return; + } + + vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE * 2, &recvlen, + &requestid); + + if (recvlen > 0) { + icmsghdrp = (struct icmsg_hdr *)&recv_buffer[ + sizeof(struct vmbuspipe_hdr)]; + + if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { + vmbus_prep_negotiate_resp(icmsghdrp, negop, + recv_buffer, MAX_SRV_VER, MAX_SRV_VER); + /* + * We currently negotiate the highest number the + * host has presented. If this version is not + * atleast 5.0, reject. + */ + negop = (struct icmsg_negotiate *)&recv_buffer[ + sizeof(struct vmbuspipe_hdr) + + sizeof(struct icmsg_hdr)]; + + if (negop->icversion_data[1].major < 5) + negop->icframe_vercnt = 0; + } else { + vss_msg = (struct hv_vss_msg *)&recv_buffer[ + sizeof(struct vmbuspipe_hdr) + + sizeof(struct icmsg_hdr)]; + + /* + * Stash away this global state for completing the + * transaction; note transactions are serialized. + */ + + vss_transaction.recv_len = recvlen; + vss_transaction.recv_channel = channel; + vss_transaction.recv_req_id = requestid; + vss_transaction.active = true; + vss_transaction.msg = (struct hv_vss_msg *)vss_msg; + + switch (vss_msg->vss_hdr.operation) { + /* + * Initiate a "freeze/thaw" + * operation in the guest. + * We respond to the host once + * the operation is complete. + * + * We send the message to the + * user space daemon and the + * operation is performed in + * the daemon. + */ + case VSS_OP_FREEZE: + case VSS_OP_THAW: + schedule_work(&vss_send_op_work); + return; + + case VSS_OP_HOT_BACKUP: + vss_msg->vss_cf.flags = + VSS_HBU_NO_AUTO_RECOVERY; + vss_respond_to_host(0); + return; + + case VSS_OP_GET_DM_INFO: + vss_msg->dm_info.flags = 0; + vss_respond_to_host(0); + return; + + default: + vss_respond_to_host(0); + return; + + } + + } + + icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION + | ICMSGHDRFLAG_RESPONSE; + + vmbus_sendpacket(channel, recv_buffer, + recvlen, requestid, + VM_PKT_DATA_INBAND, 0); + } + +} + +int +hv_vss_init(struct hv_util_service *srv) +{ + int err; + + err = cn_add_callback(&vss_id, vss_name, vss_cn_callback); + if (err) + return err; + recv_buffer = srv->recv_buffer; + + /* + * When this driver loads, the user level daemon that + * processes the host requests may not yet be running. + * Defer processing channel callbacks until the daemon + * has registered. + */ + vss_transaction.active = true; + return 0; +} + +void hv_vss_deinit(void) +{ + cn_del_callback(&vss_id); + cancel_work_sync(&vss_send_op_work); +} diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c index 1d4cbd8e8261..2f561c5dfe24 100644 --- a/drivers/hv/hv_util.c +++ b/drivers/hv/hv_util.c @@ -49,6 +49,12 @@ static struct hv_util_service util_kvp = { .util_deinit = hv_kvp_deinit, }; +static struct hv_util_service util_vss = { + .util_cb = hv_vss_onchannelcallback, + .util_init = hv_vss_init, + .util_deinit = hv_vss_deinit, +}; + static void perform_shutdown(struct work_struct *dummy) { orderly_poweroff(true); @@ -339,6 +345,10 @@ static const struct hv_vmbus_device_id id_table[] = { { HV_KVP_GUID, .driver_data = (unsigned long)&util_kvp }, + /* VSS GUID */ + { HV_VSS_GUID, + .driver_data = (unsigned long)&util_vss + }, { }, }; diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index df77ba9a8166..95d0850584da 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -27,6 +27,63 @@ #include + +/* + * Implementation of host controlled snapshot of the guest. + */ + +#define VSS_OP_REGISTER 128 + +enum hv_vss_op { + VSS_OP_CREATE = 0, + VSS_OP_DELETE, + VSS_OP_HOT_BACKUP, + VSS_OP_GET_DM_INFO, + VSS_OP_BU_COMPLETE, + /* + * Following operations are only supported with IC version >= 5.0 + */ + VSS_OP_FREEZE, /* Freeze the file systems in the VM */ + VSS_OP_THAW, /* Unfreeze the file systems */ + VSS_OP_AUTO_RECOVER, + VSS_OP_COUNT /* Number of operations, must be last */ +}; + + +/* + * Header for all VSS messages. + */ +struct hv_vss_hdr { + __u8 operation; + __u8 reserved[7]; +} __attribute__((packed)); + + +/* + * Flag values for the hv_vss_check_feature. Linux supports only + * one value. + */ +#define VSS_HBU_NO_AUTO_RECOVERY 0x00000005 + +struct hv_vss_check_feature { + __u32 flags; +} __attribute__((packed)); + +struct hv_vss_check_dm_info { + __u32 flags; +} __attribute__((packed)); + +struct hv_vss_msg { + union { + struct hv_vss_hdr vss_hdr; + int error; + }; + union { + struct hv_vss_check_feature vss_cf; + struct hv_vss_check_dm_info dm_info; + }; +} __attribute__((packed)); + /* * An implementation of HyperV key value pair (KVP) functionality for Linux. * @@ -1252,6 +1309,14 @@ void vmbus_driver_unregister(struct hv_driver *hv_driver); 0xb9, 0x8b, 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a \ } +/* + * VSS (Backup/Restore) GUID + */ +#define HV_VSS_GUID \ + .guid = { \ + 0x29, 0x2e, 0xfa, 0x35, 0x23, 0xea, 0x36, 0x42, \ + 0x96, 0xae, 0x3a, 0x6e, 0xba, 0xcb, 0xa4, 0x40 \ + } /* * Common header for Hyper-V ICs */ @@ -1356,6 +1421,10 @@ int hv_kvp_init(struct hv_util_service *); void hv_kvp_deinit(void); void hv_kvp_onchannelcallback(void *); +int hv_vss_init(struct hv_util_service *); +void hv_vss_deinit(void); +void hv_vss_onchannelcallback(void *); + /* * Negotiated version with the Host. */ diff --git a/include/uapi/linux/connector.h b/include/uapi/linux/connector.h index 8761a0349c74..4cb283505e45 100644 --- a/include/uapi/linux/connector.h +++ b/include/uapi/linux/connector.h @@ -44,8 +44,11 @@ #define CN_VAL_DRBD 0x1 #define CN_KVP_IDX 0x9 /* HyperV KVP */ #define CN_KVP_VAL 0x1 /* queries from the kernel */ +#define CN_VSS_IDX 0xA /* HyperV VSS */ +#define CN_VSS_VAL 0x1 /* queries from the kernel */ -#define CN_NETLINK_USERS 10 /* Highest index + 1 */ + +#define CN_NETLINK_USERS 11 /* Highest index + 1 */ /* * Maximum connector's message size. diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c new file mode 100644 index 000000000000..95269952aa92 --- /dev/null +++ b/tools/hv/hv_vss_daemon.c @@ -0,0 +1,220 @@ +/* + * An implementation of the host initiated guest snapshot for Hyper-V. + * + * + * Copyright (C) 2013, Microsoft, Inc. + * Author : K. Y. Srinivasan + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + * + */ + + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static char vss_recv_buffer[4096]; +static char vss_send_buffer[4096]; +static struct sockaddr_nl addr; + +#ifndef SOL_NETLINK +#define SOL_NETLINK 270 +#endif + + +static int vss_operate(int operation) +{ + char *fs_op; + char cmd[512]; + char buf[512]; + FILE *file; + char *p; + char *x; + int error; + + switch (operation) { + case VSS_OP_FREEZE: + fs_op = "-f "; + break; + case VSS_OP_THAW: + fs_op = "-u "; + break; + } + + file = popen("mount | awk '/^\/dev\// { print $3}'", "r"); + if (file == NULL) + return; + + while ((p = fgets(buf, sizeof(buf), file)) != NULL) { + x = strchr(p, '\n'); + *x = '\0'; + if (!strncmp(p, "/", sizeof("/"))) + continue; + + sprintf(cmd, "%s %s %s", "fsfreeze ", fs_op, p); + syslog(LOG_INFO, "VSS cmd is %s\n", cmd); + error = system(cmd); + } + pclose(file); + + sprintf(cmd, "%s %s %s", "fsfreeze ", fs_op, "/"); + syslog(LOG_INFO, "VSS cmd is %s\n", cmd); + error = system(cmd); + + return error; +} + +static int netlink_send(int fd, struct cn_msg *msg) +{ + struct nlmsghdr *nlh; + unsigned int size; + struct msghdr message; + char buffer[64]; + struct iovec iov[2]; + + size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len); + + nlh = (struct nlmsghdr *)buffer; + nlh->nlmsg_seq = 0; + nlh->nlmsg_pid = getpid(); + nlh->nlmsg_type = NLMSG_DONE; + nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh)); + nlh->nlmsg_flags = 0; + + iov[0].iov_base = nlh; + iov[0].iov_len = sizeof(*nlh); + + iov[1].iov_base = msg; + iov[1].iov_len = size; + + memset(&message, 0, sizeof(message)); + message.msg_name = &addr; + message.msg_namelen = sizeof(addr); + message.msg_iov = iov; + message.msg_iovlen = 2; + + return sendmsg(fd, &message, 0); +} + +int main(void) +{ + int fd, len, nl_group; + int error; + struct cn_msg *message; + struct pollfd pfd; + struct nlmsghdr *incoming_msg; + struct cn_msg *incoming_cn_msg; + int op; + struct hv_vss_msg *vss_msg; + + daemon(1, 0); + openlog("Hyper-V VSS", 0, LOG_USER); + syslog(LOG_INFO, "VSS starting; pid is:%d", getpid()); + + fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR); + if (fd < 0) { + syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd); + exit(EXIT_FAILURE); + } + addr.nl_family = AF_NETLINK; + addr.nl_pad = 0; + addr.nl_pid = 0; + addr.nl_groups = 0; + + + error = bind(fd, (struct sockaddr *)&addr, sizeof(addr)); + if (error < 0) { + syslog(LOG_ERR, "bind failed; error:%d", error); + close(fd); + exit(EXIT_FAILURE); + } + nl_group = CN_VSS_IDX; + setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group)); + /* + * Register ourselves with the kernel. + */ + message = (struct cn_msg *)vss_send_buffer; + message->id.idx = CN_VSS_IDX; + message->id.val = CN_VSS_VAL; + message->ack = 0; + vss_msg = (struct hv_vss_msg *)message->data; + vss_msg->vss_hdr.operation = VSS_OP_REGISTER; + + message->len = sizeof(struct hv_vss_msg); + + len = netlink_send(fd, message); + if (len < 0) { + syslog(LOG_ERR, "netlink_send failed; error:%d", len); + close(fd); + exit(EXIT_FAILURE); + } + + pfd.fd = fd; + + while (1) { + struct sockaddr *addr_p = (struct sockaddr *) &addr; + socklen_t addr_l = sizeof(addr); + pfd.events = POLLIN; + pfd.revents = 0; + poll(&pfd, 1, -1); + + len = recvfrom(fd, vss_recv_buffer, sizeof(vss_recv_buffer), 0, + addr_p, &addr_l); + + if (len < 0 || addr.nl_pid) { + syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s", + addr.nl_pid, errno, strerror(errno)); + close(fd); + return -1; + } + + incoming_msg = (struct nlmsghdr *)vss_recv_buffer; + + if (incoming_msg->nlmsg_type != NLMSG_DONE) + continue; + + incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg); + vss_msg = (struct hv_vss_msg *)incoming_cn_msg->data; + op = vss_msg->vss_hdr.operation; + error = HV_S_OK; + + switch (op) { + case VSS_OP_FREEZE: + case VSS_OP_THAW: + error = vss_operate(op); + if (error) + error = HV_E_FAIL; + break; + default: + syslog(LOG_ERR, "Illegal op:%d\n", op); + } + vss_msg->error = error; + len = netlink_send(fd, incoming_cn_msg); + if (len < 0) { + syslog(LOG_ERR, "net_link send failed; error:%d", len); + exit(EXIT_FAILURE); + } + } + +} -- cgit v1.2.3 From aceca2854498de7384ee7b44d8eb7820fd4c7f16 Mon Sep 17 00:00:00 2001 From: Jean-Francois Dagenais Date: Fri, 15 Mar 2013 14:20:25 -0400 Subject: w1: ds2408: make value read-back check a Kconfig option De-activating this reading back will effectively half the time required for a write to the output register. Acked-by: Evgeniy Polyakov Signed-off-by: Jean-Francois Dagenais Signed-off-by: Greg Kroah-Hartman --- drivers/w1/slaves/Kconfig | 10 ++++++++++ drivers/w1/slaves/w1_ds2408.c | 18 ++++++++++++------ 2 files changed, 22 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig index 762561fbabbf..5e6a3c9e510b 100644 --- a/drivers/w1/slaves/Kconfig +++ b/drivers/w1/slaves/Kconfig @@ -22,6 +22,16 @@ config W1_SLAVE_DS2408 Say Y here if you want to use a 1-wire DS2408 8-Channel Addressable Switch device support +config W1_SLAVE_DS2408_READBACK + bool "Read-back values written to DS2408's output register" + depends on W1_SLAVE_DS2408 + default y + help + Enabling this will cause the driver to read back the values written + to the chip's output register in order to detect errors. + + This is slower but useful when debugging chips and/or busses. + config W1_SLAVE_DS2413 tristate "Dual Channel Addressable Switch 0x3a family support (DS2413)" help diff --git a/drivers/w1/slaves/w1_ds2408.c b/drivers/w1/slaves/w1_ds2408.c index 441ad3a3b586..25a5168ab522 100644 --- a/drivers/w1/slaves/w1_ds2408.c +++ b/drivers/w1/slaves/w1_ds2408.c @@ -178,6 +178,15 @@ static ssize_t w1_f29_write_output( w1_write_block(sl->master, w1_buf, 3); readBack = w1_read_8(sl->master); + + if (readBack != W1_F29_SUCCESS_CONFIRM_BYTE) { + if (w1_reset_resume_command(sl->master)) + goto error; + /* try again, the slave is ready for a command */ + continue; + } + +#ifdef CONFIG_W1_SLAVE_DS2408_READBACK /* here the master could read another byte which would be the PIO reg (the actual pin logic state) since in this driver we don't know which pins are @@ -186,11 +195,6 @@ static ssize_t w1_f29_write_output( if (w1_reset_resume_command(sl->master)) goto error; - if (readBack != 0xAA) { - /* try again, the slave is ready for a command */ - continue; - } - /* go read back the output latches */ /* (the direct effect of the write above) */ w1_buf[0] = W1_F29_FUNC_READ_PIO_REGS; @@ -198,7 +202,9 @@ static ssize_t w1_f29_write_output( w1_buf[2] = 0; w1_write_block(sl->master, w1_buf, 3); /* read the result of the READ_PIO_REGS command */ - if (w1_read_8(sl->master) == *buf) { + if (w1_read_8(sl->master) == *buf) +#endif + { /* success! */ mutex_unlock(&sl->master->bus_mutex); dev_dbg(&sl->dev, -- cgit v1.2.3 From 1116575d918a7d5fe6d1adf46c5bbdf11dcec51b Mon Sep 17 00:00:00 2001 From: Jean-Francois Dagenais Date: Fri, 15 Mar 2013 14:20:26 -0400 Subject: w1: ds2408: use ARRAY_SIZE instead of hard-coded number Acked-by: Evgeniy Polyakov Signed-off-by: Jean-Francois Dagenais Signed-off-by: Greg Kroah-Hartman --- drivers/w1/slaves/w1_ds2408.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/w1/slaves/w1_ds2408.c b/drivers/w1/slaves/w1_ds2408.c index 25a5168ab522..e45eca1044bd 100644 --- a/drivers/w1/slaves/w1_ds2408.c +++ b/drivers/w1/slaves/w1_ds2408.c @@ -303,8 +303,7 @@ error: -#define NB_SYSFS_BIN_FILES 6 -static struct bin_attribute w1_f29_sysfs_bin_files[NB_SYSFS_BIN_FILES] = { +static struct bin_attribute w1_f29_sysfs_bin_files[] = { { .attr = { .name = "state", @@ -363,7 +362,7 @@ static int w1_f29_add_slave(struct w1_slave *sl) int err = 0; int i; - for (i = 0; i < NB_SYSFS_BIN_FILES && !err; ++i) + for (i = 0; i < ARRAY_SIZE(w1_f29_sysfs_bin_files) && !err; ++i) err = sysfs_create_bin_file( &sl->dev.kobj, &(w1_f29_sysfs_bin_files[i])); @@ -377,7 +376,7 @@ static int w1_f29_add_slave(struct w1_slave *sl) static void w1_f29_remove_slave(struct w1_slave *sl) { int i; - for (i = NB_SYSFS_BIN_FILES - 1; i >= 0; --i) + for (i = ARRAY_SIZE(w1_f29_sysfs_bin_files) - 1; i >= 0; --i) sysfs_remove_bin_file(&sl->dev.kobj, &(w1_f29_sysfs_bin_files[i])); } -- cgit v1.2.3 From fa882867ae5f8543eb304a1667563f1c99514475 Mon Sep 17 00:00:00 2001 From: Samuel Iglesias Gonsalvez Date: Fri, 8 Mar 2013 09:21:46 +0100 Subject: ipack: add ipack_get_device() ipack_put_device() Prepare everything for later use. Signed-off-by: Samuel Iglesias Gonsalvez Signed-off-by: Greg Kroah-Hartman --- drivers/ipack/ipack.c | 12 ++++++++++++ include/linux/ipack.h | 3 +++ 2 files changed, 15 insertions(+) (limited to 'drivers') diff --git a/drivers/ipack/ipack.c b/drivers/ipack/ipack.c index 7ec6b208b1cb..4f913aa88971 100644 --- a/drivers/ipack/ipack.c +++ b/drivers/ipack/ipack.c @@ -461,6 +461,18 @@ void ipack_device_unregister(struct ipack_device *dev) } EXPORT_SYMBOL_GPL(ipack_device_unregister); +void ipack_get_device(struct ipack_device *dev) +{ + get_device(&dev->dev); +} +EXPORT_SYMBOL_GPL(ipack_get_device); + +void ipack_put_device(struct ipack_device *dev) +{ + put_device(&dev->dev); +} +EXPORT_SYMBOL_GPL(ipack_put_device); + static int __init ipack_init(void) { ida_init(&ipack_ida); diff --git a/include/linux/ipack.h b/include/linux/ipack.h index fea12cbb2aeb..def91fd996f4 100644 --- a/include/linux/ipack.h +++ b/include/linux/ipack.h @@ -221,6 +221,9 @@ void ipack_driver_unregister(struct ipack_driver *edrv); int ipack_device_register(struct ipack_device *dev); void ipack_device_unregister(struct ipack_device *dev); +void ipack_get_device(struct ipack_device *dev); +void ipack_put_device(struct ipack_device *dev); + /** * DEFINE_IPACK_DEVICE_TABLE - macro used to describe a IndustryPack table * @_table: device table name -- cgit v1.2.3 From e926301b39a07f587ff8c66354a2e2ee4c29162c Mon Sep 17 00:00:00 2001 From: Samuel Iglesias Gonsalvez Date: Fri, 8 Mar 2013 09:21:47 +0100 Subject: ipack: split ipack_device_register() in several functions One function is ipack_device_init(). If it fails, the caller should execute ipack_put_device(). The second function is ipack_device_add that only adds the device. If it fails, the caller should execute ipack_put_device(). Then the device is removed with refcount = 0, as device_register() kernel documentation says. ipack_device_del() is added to remove the device. Signed-off-by: Samuel Iglesias Gonsalvez Signed-off-by: Greg Kroah-Hartman --- drivers/ipack/carriers/tpci200.c | 14 +++++++++++++- drivers/ipack/ipack.c | 24 ++++++++++++++---------- include/linux/ipack.h | 39 +++++++++++++++++++++++++++++---------- 3 files changed, 56 insertions(+), 21 deletions(-) (limited to 'drivers') diff --git a/drivers/ipack/carriers/tpci200.c b/drivers/ipack/carriers/tpci200.c index 0246b1fddffe..c276fde318e5 100644 --- a/drivers/ipack/carriers/tpci200.c +++ b/drivers/ipack/carriers/tpci200.c @@ -480,6 +480,7 @@ static void tpci200_release_device(struct ipack_device *dev) static int tpci200_create_device(struct tpci200_board *tpci200, int i) { + int ret; enum ipack_space space; struct ipack_device *dev = kzalloc(sizeof(struct ipack_device), GFP_KERNEL); @@ -495,7 +496,18 @@ static int tpci200_create_device(struct tpci200_board *tpci200, int i) + tpci200_space_interval[space] * i; dev->region[space].size = tpci200_space_size[space]; } - return ipack_device_register(dev); + + ret = ipack_device_init(dev); + if (ret < 0) { + ipack_put_device(dev); + return ret; + } + + ret = ipack_device_add(dev); + if (ret < 0) + ipack_put_device(dev); + + return ret; } static int tpci200_pci_probe(struct pci_dev *pdev, diff --git a/drivers/ipack/ipack.c b/drivers/ipack/ipack.c index 4f913aa88971..6e066c53acce 100644 --- a/drivers/ipack/ipack.c +++ b/drivers/ipack/ipack.c @@ -227,7 +227,7 @@ static int ipack_unregister_bus_member(struct device *dev, void *data) struct ipack_bus_device *bus = data; if (idev->bus == bus) - ipack_device_unregister(idev); + ipack_device_del(idev); return 1; } @@ -419,7 +419,7 @@ out: return ret; } -int ipack_device_register(struct ipack_device *dev) +int ipack_device_init(struct ipack_device *dev) { int ret; @@ -428,6 +428,7 @@ int ipack_device_register(struct ipack_device *dev) dev->dev.parent = dev->bus->parent; dev_set_name(&dev->dev, "ipack-dev.%u.%u", dev->bus->bus_nr, dev->slot); + device_initialize(&dev->dev); if (dev->bus->ops->set_clockrate(dev, 8)) dev_warn(&dev->dev, "failed to switch to 8 MHz operation for reading of device ID.\n"); @@ -447,19 +448,22 @@ int ipack_device_register(struct ipack_device *dev) dev_err(&dev->dev, "failed to switch to 32 MHz operation.\n"); } - ret = device_register(&dev->dev); - if (ret < 0) - kfree(dev->id); + return 0; +} +EXPORT_SYMBOL_GPL(ipack_device_init); - return ret; +int ipack_device_add(struct ipack_device *dev) +{ + return device_add(&dev->dev); } -EXPORT_SYMBOL_GPL(ipack_device_register); +EXPORT_SYMBOL_GPL(ipack_device_add); -void ipack_device_unregister(struct ipack_device *dev) +void ipack_device_del(struct ipack_device *dev) { - device_unregister(&dev->dev); + device_del(&dev->dev); + ipack_put_device(dev); } -EXPORT_SYMBOL_GPL(ipack_device_unregister); +EXPORT_SYMBOL_GPL(ipack_device_del); void ipack_get_device(struct ipack_device *dev) { diff --git a/include/linux/ipack.h b/include/linux/ipack.h index def91fd996f4..1888e06ddf64 100644 --- a/include/linux/ipack.h +++ b/include/linux/ipack.h @@ -207,19 +207,38 @@ int ipack_driver_register(struct ipack_driver *edrv, struct module *owner, void ipack_driver_unregister(struct ipack_driver *edrv); /** - * ipack_device_register -- register an IPack device with the kernel - * @dev: the new device to register. + * ipack_device_init -- initialize an IPack device + * @dev: the new device to initialize. * - * Register a new IPack device ("module" in IndustryPack jargon). The call - * is done by the carrier driver. The carrier should populate the fields - * bus and slot as well as the region array of @dev prior to calling this - * function. The rest of the fields will be allocated and populated - * during registration. + * Initialize a new IPack device ("module" in IndustryPack jargon). The call + * is done by the carrier driver. The carrier should populate the fields + * bus and slot as well as the region array of @dev prior to calling this + * function. The rest of the fields will be allocated and populated + * during initalization. * - * Return zero on success or error code on failure. + * Return zero on success or error code on failure. + * + * NOTE: _Never_ directly free @dev after calling this function, even + * if it returned an error! Always use ipack_put_device() to give up the + * reference initialized in this function instead. + */ +int ipack_device_init(struct ipack_device *dev); + +/** + * ipack_device_add -- Add an IPack device + * @dev: the new device to add. + * + * Add a new IPack device. The call is done by the carrier driver + * after calling ipack_device_init(). + * + * Return zero on success or error code on failure. + * + * NOTE: _Never_ directly free @dev after calling this function, even + * if it returned an error! Always use ipack_put_device() to give up the + * reference initialized in this function instead. */ -int ipack_device_register(struct ipack_device *dev); -void ipack_device_unregister(struct ipack_device *dev); +int ipack_device_add(struct ipack_device *dev); +void ipack_device_del(struct ipack_device *dev); void ipack_get_device(struct ipack_device *dev); void ipack_put_device(struct ipack_device *dev); -- cgit v1.2.3 From 2154e0a4f43e0c811737e391e7981d331e450d42 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 1 Mar 2013 23:31:46 +0300 Subject: applicom: use correct array offset We're iterating through abps[] printing information, but here we use the wrong array index. IndexCard comes from the user and in this case it was specifically not range checked because we didn't expect to use it. Signed-off-by: Dan Carpenter Acked-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/char/applicom.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c index 25373df1dcf8..974321a2508d 100644 --- a/drivers/char/applicom.c +++ b/drivers/char/applicom.c @@ -804,8 +804,8 @@ static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", i+1, - (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4), - (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF), + (int)(readb(apbs[i].RamIO + VERS) >> 4), + (int)(readb(apbs[i].RamIO + VERS) & 0xF), boardname); -- cgit v1.2.3 From e7c2199ff300fcf88673a1cf6d7229e6c3da09de Mon Sep 17 00:00:00 2001 From: Fabio Porcedda Date: Thu, 14 Mar 2013 18:09:33 +0100 Subject: drivers: char: use module_platform_driver_probe() This patch converts the drivers to use the module_platform_driver_probe() macro which makes the code smaller and a bit simpler. Signed-off-by: Fabio Porcedda Cc: Matt Mackall Cc: Herbert Xu Cc: Fabio Estevam Cc: Sascha Hauer Signed-off-by: Greg Kroah-Hartman --- drivers/char/hw_random/mxc-rnga.c | 13 +------------ drivers/char/hw_random/tx4939-rng.c | 13 +------------ 2 files changed, 2 insertions(+), 24 deletions(-) (limited to 'drivers') diff --git a/drivers/char/hw_random/mxc-rnga.c b/drivers/char/hw_random/mxc-rnga.c index f05d85713fd3..895d0b8fb9ab 100644 --- a/drivers/char/hw_random/mxc-rnga.c +++ b/drivers/char/hw_random/mxc-rnga.c @@ -228,18 +228,7 @@ static struct platform_driver mxc_rnga_driver = { .remove = __exit_p(mxc_rnga_remove), }; -static int __init mod_init(void) -{ - return platform_driver_probe(&mxc_rnga_driver, mxc_rnga_probe); -} - -static void __exit mod_exit(void) -{ - platform_driver_unregister(&mxc_rnga_driver); -} - -module_init(mod_init); -module_exit(mod_exit); +module_platform_driver_probe(mxc_rnga_driver, mxc_rnga_probe); MODULE_AUTHOR("Freescale Semiconductor, Inc."); MODULE_DESCRIPTION("H/W RNGA driver for i.MX"); diff --git a/drivers/char/hw_random/tx4939-rng.c b/drivers/char/hw_random/tx4939-rng.c index 30991989d65b..d34a24a0d484 100644 --- a/drivers/char/hw_random/tx4939-rng.c +++ b/drivers/char/hw_random/tx4939-rng.c @@ -166,18 +166,7 @@ static struct platform_driver tx4939_rng_driver = { .remove = tx4939_rng_remove, }; -static int __init tx4939rng_init(void) -{ - return platform_driver_probe(&tx4939_rng_driver, tx4939_rng_probe); -} - -static void __exit tx4939rng_exit(void) -{ - platform_driver_unregister(&tx4939_rng_driver); -} - -module_init(tx4939rng_init); -module_exit(tx4939rng_exit); +module_platform_driver_probe(tx4939_rng_driver, tx4939_rng_probe); MODULE_DESCRIPTION("H/W Random Number Generator (RNG) driver for TX4939"); MODULE_LICENSE("GPL"); -- cgit v1.2.3 From 460604850a0cfcdb124fa627f56ca91529fb6c59 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 6 Mar 2013 11:25:44 -0700 Subject: drivers/ata: use module_pcmcia_driver() in pcmcia drivers Use the new module_pcmcia_driver() macro to remove the boilerplate module init/exit code in the pcmcia drivers. Signed-off-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- drivers/ata/pata_pcmcia.c | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) (limited to 'drivers') diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c index 958238dda8fc..40254f4df584 100644 --- a/drivers/ata/pata_pcmcia.c +++ b/drivers/ata/pata_pcmcia.c @@ -387,21 +387,9 @@ static struct pcmcia_driver pcmcia_driver = { .probe = pcmcia_init_one, .remove = pcmcia_remove_one, }; - -static int __init pcmcia_init(void) -{ - return pcmcia_register_driver(&pcmcia_driver); -} - -static void __exit pcmcia_exit(void) -{ - pcmcia_unregister_driver(&pcmcia_driver); -} +module_pcmcia_driver(pcmcia_driver); MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("low-level driver for PCMCIA ATA"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); - -module_init(pcmcia_init); -module_exit(pcmcia_exit); -- cgit v1.2.3 From e0c005f4b9fe8bb2bceb5ce9f69eaa61383f41db Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 6 Mar 2013 11:26:24 -0700 Subject: drivers/bluetooth: use module_pcmcia_driver() in pcmcia drivers Use the new module_pcmcia_driver() macro to remove the boilerplate module init/exit code in the pcmcia drivers. Signed-off-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- drivers/bluetooth/bluecard_cs.c | 15 +-------------- drivers/bluetooth/bt3c_cs.c | 15 +-------------- drivers/bluetooth/btuart_cs.c | 15 +-------------- drivers/bluetooth/dtl1_cs.c | 15 +-------------- 4 files changed, 4 insertions(+), 56 deletions(-) (limited to 'drivers') diff --git a/drivers/bluetooth/bluecard_cs.c b/drivers/bluetooth/bluecard_cs.c index 0d26851d6e49..6c3e3d43c718 100644 --- a/drivers/bluetooth/bluecard_cs.c +++ b/drivers/bluetooth/bluecard_cs.c @@ -934,17 +934,4 @@ static struct pcmcia_driver bluecard_driver = { .remove = bluecard_detach, .id_table = bluecard_ids, }; - -static int __init init_bluecard_cs(void) -{ - return pcmcia_register_driver(&bluecard_driver); -} - - -static void __exit exit_bluecard_cs(void) -{ - pcmcia_unregister_driver(&bluecard_driver); -} - -module_init(init_bluecard_cs); -module_exit(exit_bluecard_cs); +module_pcmcia_driver(bluecard_driver); diff --git a/drivers/bluetooth/bt3c_cs.c b/drivers/bluetooth/bt3c_cs.c index 7ffd3f407144..a1aaa3ba2a4b 100644 --- a/drivers/bluetooth/bt3c_cs.c +++ b/drivers/bluetooth/bt3c_cs.c @@ -760,17 +760,4 @@ static struct pcmcia_driver bt3c_driver = { .remove = bt3c_detach, .id_table = bt3c_ids, }; - -static int __init init_bt3c_cs(void) -{ - return pcmcia_register_driver(&bt3c_driver); -} - - -static void __exit exit_bt3c_cs(void) -{ - pcmcia_unregister_driver(&bt3c_driver); -} - -module_init(init_bt3c_cs); -module_exit(exit_bt3c_cs); +module_pcmcia_driver(bt3c_driver); diff --git a/drivers/bluetooth/btuart_cs.c b/drivers/bluetooth/btuart_cs.c index 35a553a90616..beb262f2dc4d 100644 --- a/drivers/bluetooth/btuart_cs.c +++ b/drivers/bluetooth/btuart_cs.c @@ -688,17 +688,4 @@ static struct pcmcia_driver btuart_driver = { .remove = btuart_detach, .id_table = btuart_ids, }; - -static int __init init_btuart_cs(void) -{ - return pcmcia_register_driver(&btuart_driver); -} - - -static void __exit exit_btuart_cs(void) -{ - pcmcia_unregister_driver(&btuart_driver); -} - -module_init(init_btuart_cs); -module_exit(exit_btuart_cs); +module_pcmcia_driver(btuart_driver); diff --git a/drivers/bluetooth/dtl1_cs.c b/drivers/bluetooth/dtl1_cs.c index 036cb366fe6e..33f3a6950c0e 100644 --- a/drivers/bluetooth/dtl1_cs.c +++ b/drivers/bluetooth/dtl1_cs.c @@ -628,17 +628,4 @@ static struct pcmcia_driver dtl1_driver = { .remove = dtl1_detach, .id_table = dtl1_ids, }; - -static int __init init_dtl1_cs(void) -{ - return pcmcia_register_driver(&dtl1_driver); -} - - -static void __exit exit_dtl1_cs(void) -{ - pcmcia_unregister_driver(&dtl1_driver); -} - -module_init(init_dtl1_cs); -module_exit(exit_dtl1_cs); +module_pcmcia_driver(dtl1_driver); -- cgit v1.2.3 From 0aae9c6a913483b69b5cb703329cbf1ed3efbfcb Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 6 Mar 2013 11:26:50 -0700 Subject: drivers/isdn: use module_pcmcia_driver() in pcmcia drivers Use the new module_pcmcia_driver() macro to remove the boilerplate module init/exit code in the pcmcia drivers. Signed-off-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- drivers/isdn/hardware/avm/avm_cs.c | 14 +------------- drivers/isdn/hisax/avma1_cs.c | 14 +------------- drivers/isdn/hisax/elsa_cs.c | 14 +------------- drivers/isdn/hisax/sedlbauer_cs.c | 14 +------------- drivers/isdn/hisax/teles_cs.c | 14 +------------- 5 files changed, 5 insertions(+), 65 deletions(-) (limited to 'drivers') diff --git a/drivers/isdn/hardware/avm/avm_cs.c b/drivers/isdn/hardware/avm/avm_cs.c index c21353d8e915..62b8030ee331 100644 --- a/drivers/isdn/hardware/avm/avm_cs.c +++ b/drivers/isdn/hardware/avm/avm_cs.c @@ -163,16 +163,4 @@ static struct pcmcia_driver avmcs_driver = { .remove = avmcs_detach, .id_table = avmcs_ids, }; - -static int __init avmcs_init(void) -{ - return pcmcia_register_driver(&avmcs_driver); -} - -static void __exit avmcs_exit(void) -{ - pcmcia_unregister_driver(&avmcs_driver); -} - -module_init(avmcs_init); -module_exit(avmcs_exit); +module_pcmcia_driver(avmcs_driver); diff --git a/drivers/isdn/hisax/avma1_cs.c b/drivers/isdn/hisax/avma1_cs.c index 4e676bcf8506..baad94ec1f4a 100644 --- a/drivers/isdn/hisax/avma1_cs.c +++ b/drivers/isdn/hisax/avma1_cs.c @@ -159,16 +159,4 @@ static struct pcmcia_driver avma1cs_driver = { .remove = avma1cs_detach, .id_table = avma1cs_ids, }; - -static int __init init_avma1_cs(void) -{ - return pcmcia_register_driver(&avma1cs_driver); -} - -static void __exit exit_avma1_cs(void) -{ - pcmcia_unregister_driver(&avma1cs_driver); -} - -module_init(init_avma1_cs); -module_exit(exit_avma1_cs); +module_pcmcia_driver(avma1cs_driver); diff --git a/drivers/isdn/hisax/elsa_cs.c b/drivers/isdn/hisax/elsa_cs.c index ebe56918f6fc..40f6fad79de3 100644 --- a/drivers/isdn/hisax/elsa_cs.c +++ b/drivers/isdn/hisax/elsa_cs.c @@ -215,16 +215,4 @@ static struct pcmcia_driver elsa_cs_driver = { .suspend = elsa_suspend, .resume = elsa_resume, }; - -static int __init init_elsa_cs(void) -{ - return pcmcia_register_driver(&elsa_cs_driver); -} - -static void __exit exit_elsa_cs(void) -{ - pcmcia_unregister_driver(&elsa_cs_driver); -} - -module_init(init_elsa_cs); -module_exit(exit_elsa_cs); +module_pcmcia_driver(elsa_cs_driver); diff --git a/drivers/isdn/hisax/sedlbauer_cs.c b/drivers/isdn/hisax/sedlbauer_cs.c index 90f81291641b..92ef62d4caf4 100644 --- a/drivers/isdn/hisax/sedlbauer_cs.c +++ b/drivers/isdn/hisax/sedlbauer_cs.c @@ -206,16 +206,4 @@ static struct pcmcia_driver sedlbauer_driver = { .suspend = sedlbauer_suspend, .resume = sedlbauer_resume, }; - -static int __init init_sedlbauer_cs(void) -{ - return pcmcia_register_driver(&sedlbauer_driver); -} - -static void __exit exit_sedlbauer_cs(void) -{ - pcmcia_unregister_driver(&sedlbauer_driver); -} - -module_init(init_sedlbauer_cs); -module_exit(exit_sedlbauer_cs); +module_pcmcia_driver(sedlbauer_driver); diff --git a/drivers/isdn/hisax/teles_cs.c b/drivers/isdn/hisax/teles_cs.c index f2476ffb04fd..b8dd14958757 100644 --- a/drivers/isdn/hisax/teles_cs.c +++ b/drivers/isdn/hisax/teles_cs.c @@ -197,16 +197,4 @@ static struct pcmcia_driver teles_cs_driver = { .suspend = teles_suspend, .resume = teles_resume, }; - -static int __init init_teles_cs(void) -{ - return pcmcia_register_driver(&teles_cs_driver); -} - -static void __exit exit_teles_cs(void) -{ - pcmcia_unregister_driver(&teles_cs_driver); -} - -module_init(init_teles_cs); -module_exit(exit_teles_cs); +module_pcmcia_driver(teles_cs_driver); -- cgit v1.2.3 From fe141149bffeaaaae214b6fbb98b592d3c516fb5 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 6 Mar 2013 11:27:15 -0700 Subject: drivers/mmc: use module_pcmcia_driver() in pcmcia drivers Use the new module_pcmcia_driver() macro to remove the boilerplate module init/exit code in the pcmcia drivers. Signed-off-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/sdricoh_cs.c | 20 +------------------- 1 file changed, 1 insertion(+), 19 deletions(-) (limited to 'drivers') diff --git a/drivers/mmc/host/sdricoh_cs.c b/drivers/mmc/host/sdricoh_cs.c index 7009f17ad6cd..50adbd155f35 100644 --- a/drivers/mmc/host/sdricoh_cs.c +++ b/drivers/mmc/host/sdricoh_cs.c @@ -543,25 +543,7 @@ static struct pcmcia_driver sdricoh_driver = { .suspend = sdricoh_pcmcia_suspend, .resume = sdricoh_pcmcia_resume, }; - -/*****************************************************************************\ - * * - * Driver init/exit * - * * -\*****************************************************************************/ - -static int __init sdricoh_drv_init(void) -{ - return pcmcia_register_driver(&sdricoh_driver); -} - -static void __exit sdricoh_drv_exit(void) -{ - pcmcia_unregister_driver(&sdricoh_driver); -} - -module_init(sdricoh_drv_init); -module_exit(sdricoh_drv_exit); +module_pcmcia_driver(sdricoh_driver); module_param(switchlocked, uint, 0444); -- cgit v1.2.3 From f23e79688c1469b13ac33420efbc974b6772564f Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 6 Mar 2013 11:28:04 -0700 Subject: drivers/parport: use module_pcmcia_driver() in pcmcia drivers Use the new module_pcmcia_driver() macro to remove the boilerplate module init/exit code in the pcmcia drivers. Signed-off-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- drivers/parport/parport_cs.c | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) (limited to 'drivers') diff --git a/drivers/parport/parport_cs.c b/drivers/parport/parport_cs.c index 067ad517c1f5..e9b52e4a4648 100644 --- a/drivers/parport/parport_cs.c +++ b/drivers/parport/parport_cs.c @@ -193,16 +193,4 @@ static struct pcmcia_driver parport_cs_driver = { .remove = parport_detach, .id_table = parport_ids, }; - -static int __init init_parport_cs(void) -{ - return pcmcia_register_driver(&parport_cs_driver); -} - -static void __exit exit_parport_cs(void) -{ - pcmcia_unregister_driver(&parport_cs_driver); -} - -module_init(init_parport_cs); -module_exit(exit_parport_cs); +module_pcmcia_driver(parport_cs_driver); -- cgit v1.2.3 From 3e13ea450b6a4714ee05ba4d61e5b32821cde550 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 6 Mar 2013 11:28:29 -0700 Subject: drivers/scsi: use module_pcmcia_driver() in pcmcia drivers Use the new module_pcmcia_driver() macro to remove the boilerplate module init/exit code in the pcmcia drivers. Signed-off-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/pcmcia/aha152x_stub.c | 14 +------------- drivers/scsi/pcmcia/fdomain_stub.c | 14 +------------- drivers/scsi/pcmcia/nsp_cs.c | 17 +---------------- drivers/scsi/pcmcia/qlogic_stub.c | 13 +------------ drivers/scsi/pcmcia/sym53c500_cs.c | 16 +--------------- 5 files changed, 5 insertions(+), 69 deletions(-) (limited to 'drivers') diff --git a/drivers/scsi/pcmcia/aha152x_stub.c b/drivers/scsi/pcmcia/aha152x_stub.c index 7d1609fa233c..df82a349e969 100644 --- a/drivers/scsi/pcmcia/aha152x_stub.c +++ b/drivers/scsi/pcmcia/aha152x_stub.c @@ -220,16 +220,4 @@ static struct pcmcia_driver aha152x_cs_driver = { .id_table = aha152x_ids, .resume = aha152x_resume, }; - -static int __init init_aha152x_cs(void) -{ - return pcmcia_register_driver(&aha152x_cs_driver); -} - -static void __exit exit_aha152x_cs(void) -{ - pcmcia_unregister_driver(&aha152x_cs_driver); -} - -module_init(init_aha152x_cs); -module_exit(exit_aha152x_cs); +module_pcmcia_driver(aha152x_cs_driver); diff --git a/drivers/scsi/pcmcia/fdomain_stub.c b/drivers/scsi/pcmcia/fdomain_stub.c index 714b248f5d5e..ba84769e849f 100644 --- a/drivers/scsi/pcmcia/fdomain_stub.c +++ b/drivers/scsi/pcmcia/fdomain_stub.c @@ -194,16 +194,4 @@ static struct pcmcia_driver fdomain_cs_driver = { .id_table = fdomain_ids, .resume = fdomain_resume, }; - -static int __init init_fdomain_cs(void) -{ - return pcmcia_register_driver(&fdomain_cs_driver); -} - -static void __exit exit_fdomain_cs(void) -{ - pcmcia_unregister_driver(&fdomain_cs_driver); -} - -module_init(init_fdomain_cs); -module_exit(exit_fdomain_cs); +module_pcmcia_driver(fdomain_cs_driver); diff --git a/drivers/scsi/pcmcia/nsp_cs.c b/drivers/scsi/pcmcia/nsp_cs.c index b61a753eb896..76ca00cbc11e 100644 --- a/drivers/scsi/pcmcia/nsp_cs.c +++ b/drivers/scsi/pcmcia/nsp_cs.c @@ -1773,19 +1773,4 @@ static struct pcmcia_driver nsp_driver = { .suspend = nsp_cs_suspend, .resume = nsp_cs_resume, }; - -static int __init nsp_cs_init(void) -{ - return pcmcia_register_driver(&nsp_driver); -} - -static void __exit nsp_cs_exit(void) -{ - pcmcia_unregister_driver(&nsp_driver); -} - - -module_init(nsp_cs_init) -module_exit(nsp_cs_exit) - -/* end */ +module_pcmcia_driver(nsp_driver); diff --git a/drivers/scsi/pcmcia/qlogic_stub.c b/drivers/scsi/pcmcia/qlogic_stub.c index bcaf89fe0c9e..8d4fdc292242 100644 --- a/drivers/scsi/pcmcia/qlogic_stub.c +++ b/drivers/scsi/pcmcia/qlogic_stub.c @@ -300,19 +300,8 @@ static struct pcmcia_driver qlogic_cs_driver = { .id_table = qlogic_ids, .resume = qlogic_resume, }; - -static int __init init_qlogic_cs(void) -{ - return pcmcia_register_driver(&qlogic_cs_driver); -} - -static void __exit exit_qlogic_cs(void) -{ - pcmcia_unregister_driver(&qlogic_cs_driver); -} +module_pcmcia_driver(qlogic_cs_driver); MODULE_AUTHOR("Tom Zerucha, Michael Griffith"); MODULE_DESCRIPTION("Driver for the PCMCIA Qlogic FAS SCSI controllers"); MODULE_LICENSE("GPL"); -module_init(init_qlogic_cs); -module_exit(exit_qlogic_cs); diff --git a/drivers/scsi/pcmcia/sym53c500_cs.c b/drivers/scsi/pcmcia/sym53c500_cs.c index f5b52731abd9..55b0b2b38a65 100644 --- a/drivers/scsi/pcmcia/sym53c500_cs.c +++ b/drivers/scsi/pcmcia/sym53c500_cs.c @@ -881,18 +881,4 @@ static struct pcmcia_driver sym53c500_cs_driver = { .id_table = sym53c500_ids, .resume = sym53c500_resume, }; - -static int __init -init_sym53c500_cs(void) -{ - return pcmcia_register_driver(&sym53c500_cs_driver); -} - -static void __exit -exit_sym53c500_cs(void) -{ - pcmcia_unregister_driver(&sym53c500_cs_driver); -} - -module_init(init_sym53c500_cs); -module_exit(exit_sym53c500_cs); +module_pcmcia_driver(sym53c500_cs_driver); -- cgit v1.2.3 From 5339102c778bab379b4ec6348a184481dc7ad614 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 6 Mar 2013 11:28:53 -0700 Subject: drivers/tty: use module_pcmcia_driver() in pcmcia drivers Use the new module_pcmcia_driver() macro to remove the boilerplate module init/exit code in the pcmcia drivers. Signed-off-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/serial_cs.c | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) (limited to 'drivers') diff --git a/drivers/tty/serial/8250/serial_cs.c b/drivers/tty/serial/8250/serial_cs.c index b7d48b346393..1b74b88e1e1e 100644 --- a/drivers/tty/serial/8250/serial_cs.c +++ b/drivers/tty/serial/8250/serial_cs.c @@ -852,18 +852,6 @@ static struct pcmcia_driver serial_cs_driver = { .suspend = serial_suspend, .resume = serial_resume, }; - -static int __init init_serial_cs(void) -{ - return pcmcia_register_driver(&serial_cs_driver); -} - -static void __exit exit_serial_cs(void) -{ - pcmcia_unregister_driver(&serial_cs_driver); -} - -module_init(init_serial_cs); -module_exit(exit_serial_cs); +module_pcmcia_driver(serial_cs_driver); MODULE_LICENSE("GPL"); -- cgit v1.2.3 From 4c7a45fb1bf683357e5222e664aaee80390051f4 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 6 Mar 2013 11:29:17 -0700 Subject: drivers/usb: use module_pcmcia_driver() in pcmcia drivers Use the new module_pcmcia_driver() macro to remove the boilerplate module init/exit code in the pcmcia drivers. Signed-off-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/sl811_cs.c | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-) (limited to 'drivers') diff --git a/drivers/usb/host/sl811_cs.c b/drivers/usb/host/sl811_cs.c index 3b6f50eaec91..469564e57a52 100644 --- a/drivers/usb/host/sl811_cs.c +++ b/drivers/usb/host/sl811_cs.c @@ -200,17 +200,4 @@ static struct pcmcia_driver sl811_cs_driver = { .remove = sl811_cs_detach, .id_table = sl811_ids, }; - -/*====================================================================*/ - -static int __init init_sl811_cs(void) -{ - return pcmcia_register_driver(&sl811_cs_driver); -} -module_init(init_sl811_cs); - -static void __exit exit_sl811_cs(void) -{ - pcmcia_unregister_driver(&sl811_cs_driver); -} -module_exit(exit_sl811_cs); +module_pcmcia_driver(sl811_cs_driver); -- cgit v1.2.3 From fdd3f29eddd1b7c26b3b42e3633afcb22a28fcb3 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 6 Mar 2013 11:27:43 -0700 Subject: drivers/net: use module_pcmcia_driver() in pcmcia drivers Use the new module_pcmcia_driver() macro to remove the boilerplate module init/exit code in the pcmcia drivers. Signed-off-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- drivers/net/arcnet/com20020_cs.c | 14 +------------- drivers/net/can/sja1000/ems_pcmcia.c | 13 +------------ drivers/net/can/sja1000/peak_pcmcia.c | 13 +------------ drivers/net/ethernet/3com/3c574_cs.c | 14 +------------- drivers/net/ethernet/3com/3c589_cs.c | 14 +------------- drivers/net/ethernet/8390/axnet_cs.c | 14 +------------- drivers/net/ethernet/8390/pcnet_cs.c | 14 +------------- drivers/net/ethernet/amd/nmclan_cs.c | 14 +------------- drivers/net/ethernet/fujitsu/fmvj18x_cs.c | 14 +------------- drivers/net/ethernet/smsc/smc91c92_cs.c | 14 +------------- drivers/net/ethernet/xircom/xirc2ps_cs.c | 16 +--------------- drivers/net/wireless/airo_cs.c | 14 +------------- drivers/net/wireless/atmel_cs.c | 14 +------------- drivers/net/wireless/b43/pcmcia.c | 4 ++++ drivers/net/wireless/hostap/hostap_cs.c | 15 +-------------- drivers/net/wireless/libertas/if_cs.c | 25 +------------------------ drivers/net/wireless/orinoco/orinoco_cs.c | 16 +--------------- drivers/net/wireless/orinoco/spectrum_cs.c | 16 +--------------- drivers/net/wireless/wl3501_cs.c | 14 +------------- 19 files changed, 22 insertions(+), 250 deletions(-) (limited to 'drivers') diff --git a/drivers/net/arcnet/com20020_cs.c b/drivers/net/arcnet/com20020_cs.c index 5bed4c4e2508..74dc1875f9cd 100644 --- a/drivers/net/arcnet/com20020_cs.c +++ b/drivers/net/arcnet/com20020_cs.c @@ -333,16 +333,4 @@ static struct pcmcia_driver com20020_cs_driver = { .suspend = com20020_suspend, .resume = com20020_resume, }; - -static int __init init_com20020_cs(void) -{ - return pcmcia_register_driver(&com20020_cs_driver); -} - -static void __exit exit_com20020_cs(void) -{ - pcmcia_unregister_driver(&com20020_cs_driver); -} - -module_init(init_com20020_cs); -module_exit(exit_com20020_cs); +module_pcmcia_driver(com20020_cs_driver); diff --git a/drivers/net/can/sja1000/ems_pcmcia.c b/drivers/net/can/sja1000/ems_pcmcia.c index 5c2f3fbbf5ae..321c27e1c7fc 100644 --- a/drivers/net/can/sja1000/ems_pcmcia.c +++ b/drivers/net/can/sja1000/ems_pcmcia.c @@ -316,15 +316,4 @@ static struct pcmcia_driver ems_pcmcia_driver = { .remove = ems_pcmcia_remove, .id_table = ems_pcmcia_tbl, }; - -static int __init ems_pcmcia_init(void) -{ - return pcmcia_register_driver(&ems_pcmcia_driver); -} -module_init(ems_pcmcia_init); - -static void __exit ems_pcmcia_exit(void) -{ - pcmcia_unregister_driver(&ems_pcmcia_driver); -} -module_exit(ems_pcmcia_exit); +module_pcmcia_driver(ems_pcmcia_driver); diff --git a/drivers/net/can/sja1000/peak_pcmcia.c b/drivers/net/can/sja1000/peak_pcmcia.c index 1a7020ba37f5..0a707f70661c 100644 --- a/drivers/net/can/sja1000/peak_pcmcia.c +++ b/drivers/net/can/sja1000/peak_pcmcia.c @@ -740,15 +740,4 @@ static struct pcmcia_driver pcan_driver = { .remove = pcan_remove, .id_table = pcan_table, }; - -static int __init pcan_init(void) -{ - return pcmcia_register_driver(&pcan_driver); -} -module_init(pcan_init); - -static void __exit pcan_exit(void) -{ - pcmcia_unregister_driver(&pcan_driver); -} -module_exit(pcan_exit); +module_pcmcia_driver(pcan_driver); diff --git a/drivers/net/ethernet/3com/3c574_cs.c b/drivers/net/ethernet/3com/3c574_cs.c index ffd8de28a76a..6fc994fa4abe 100644 --- a/drivers/net/ethernet/3com/3c574_cs.c +++ b/drivers/net/ethernet/3com/3c574_cs.c @@ -1165,16 +1165,4 @@ static struct pcmcia_driver tc574_driver = { .suspend = tc574_suspend, .resume = tc574_resume, }; - -static int __init init_tc574(void) -{ - return pcmcia_register_driver(&tc574_driver); -} - -static void __exit exit_tc574(void) -{ - pcmcia_unregister_driver(&tc574_driver); -} - -module_init(init_tc574); -module_exit(exit_tc574); +module_pcmcia_driver(tc574_driver); diff --git a/drivers/net/ethernet/3com/3c589_cs.c b/drivers/net/ethernet/3com/3c589_cs.c index a556c01e011b..078480aaa168 100644 --- a/drivers/net/ethernet/3com/3c589_cs.c +++ b/drivers/net/ethernet/3com/3c589_cs.c @@ -928,16 +928,4 @@ static struct pcmcia_driver tc589_driver = { .suspend = tc589_suspend, .resume = tc589_resume, }; - -static int __init init_tc589(void) -{ - return pcmcia_register_driver(&tc589_driver); -} - -static void __exit exit_tc589(void) -{ - pcmcia_unregister_driver(&tc589_driver); -} - -module_init(init_tc589); -module_exit(exit_tc589); +module_pcmcia_driver(tc589_driver); diff --git a/drivers/net/ethernet/8390/axnet_cs.c b/drivers/net/ethernet/8390/axnet_cs.c index e1b3941bd149..d801c1410fb0 100644 --- a/drivers/net/ethernet/8390/axnet_cs.c +++ b/drivers/net/ethernet/8390/axnet_cs.c @@ -728,19 +728,7 @@ static struct pcmcia_driver axnet_cs_driver = { .suspend = axnet_suspend, .resume = axnet_resume, }; - -static int __init init_axnet_cs(void) -{ - return pcmcia_register_driver(&axnet_cs_driver); -} - -static void __exit exit_axnet_cs(void) -{ - pcmcia_unregister_driver(&axnet_cs_driver); -} - -module_init(init_axnet_cs); -module_exit(exit_axnet_cs); +module_pcmcia_driver(axnet_cs_driver); /*====================================================================*/ diff --git a/drivers/net/ethernet/8390/pcnet_cs.c b/drivers/net/ethernet/8390/pcnet_cs.c index de1af0bfed4c..46c5aadaca8e 100644 --- a/drivers/net/ethernet/8390/pcnet_cs.c +++ b/drivers/net/ethernet/8390/pcnet_cs.c @@ -1694,16 +1694,4 @@ static struct pcmcia_driver pcnet_driver = { .suspend = pcnet_suspend, .resume = pcnet_resume, }; - -static int __init init_pcnet_cs(void) -{ - return pcmcia_register_driver(&pcnet_driver); -} - -static void __exit exit_pcnet_cs(void) -{ - pcmcia_unregister_driver(&pcnet_driver); -} - -module_init(init_pcnet_cs); -module_exit(exit_pcnet_cs); +module_pcmcia_driver(pcnet_driver); diff --git a/drivers/net/ethernet/amd/nmclan_cs.c b/drivers/net/ethernet/amd/nmclan_cs.c index 9f59bf63514b..d4ed89130c52 100644 --- a/drivers/net/ethernet/amd/nmclan_cs.c +++ b/drivers/net/ethernet/amd/nmclan_cs.c @@ -1508,16 +1508,4 @@ static struct pcmcia_driver nmclan_cs_driver = { .suspend = nmclan_suspend, .resume = nmclan_resume, }; - -static int __init init_nmclan_cs(void) -{ - return pcmcia_register_driver(&nmclan_cs_driver); -} - -static void __exit exit_nmclan_cs(void) -{ - pcmcia_unregister_driver(&nmclan_cs_driver); -} - -module_init(init_nmclan_cs); -module_exit(exit_nmclan_cs); +module_pcmcia_driver(nmclan_cs_driver); diff --git a/drivers/net/ethernet/fujitsu/fmvj18x_cs.c b/drivers/net/ethernet/fujitsu/fmvj18x_cs.c index 2418faf2251a..ab98b77df309 100644 --- a/drivers/net/ethernet/fujitsu/fmvj18x_cs.c +++ b/drivers/net/ethernet/fujitsu/fmvj18x_cs.c @@ -705,19 +705,7 @@ static struct pcmcia_driver fmvj18x_cs_driver = { .suspend = fmvj18x_suspend, .resume = fmvj18x_resume, }; - -static int __init init_fmvj18x_cs(void) -{ - return pcmcia_register_driver(&fmvj18x_cs_driver); -} - -static void __exit exit_fmvj18x_cs(void) -{ - pcmcia_unregister_driver(&fmvj18x_cs_driver); -} - -module_init(init_fmvj18x_cs); -module_exit(exit_fmvj18x_cs); +module_pcmcia_driver(fmvj18x_cs_driver); /*====================================================================*/ diff --git a/drivers/net/ethernet/smsc/smc91c92_cs.c b/drivers/net/ethernet/smsc/smc91c92_cs.c index 04393b5fef71..656d2e2ebfc9 100644 --- a/drivers/net/ethernet/smsc/smc91c92_cs.c +++ b/drivers/net/ethernet/smsc/smc91c92_cs.c @@ -2054,16 +2054,4 @@ static struct pcmcia_driver smc91c92_cs_driver = { .suspend = smc91c92_suspend, .resume = smc91c92_resume, }; - -static int __init init_smc91c92_cs(void) -{ - return pcmcia_register_driver(&smc91c92_cs_driver); -} - -static void __exit exit_smc91c92_cs(void) -{ - pcmcia_unregister_driver(&smc91c92_cs_driver); -} - -module_init(init_smc91c92_cs); -module_exit(exit_smc91c92_cs); +module_pcmcia_driver(smc91c92_cs_driver); diff --git a/drivers/net/ethernet/xircom/xirc2ps_cs.c b/drivers/net/ethernet/xircom/xirc2ps_cs.c index 98e09d0d3ce2..1025b4e937d2 100644 --- a/drivers/net/ethernet/xircom/xirc2ps_cs.c +++ b/drivers/net/ethernet/xircom/xirc2ps_cs.c @@ -1775,21 +1775,7 @@ static struct pcmcia_driver xirc2ps_cs_driver = { .suspend = xirc2ps_suspend, .resume = xirc2ps_resume, }; - -static int __init -init_xirc2ps_cs(void) -{ - return pcmcia_register_driver(&xirc2ps_cs_driver); -} - -static void __exit -exit_xirc2ps_cs(void) -{ - pcmcia_unregister_driver(&xirc2ps_cs_driver); -} - -module_init(init_xirc2ps_cs); -module_exit(exit_xirc2ps_cs); +module_pcmcia_driver(xirc2ps_cs_driver); #ifndef MODULE static int __init setup_xirc2ps_cs(char *str) diff --git a/drivers/net/wireless/airo_cs.c b/drivers/net/wireless/airo_cs.c index 956024a636e6..14128fd265ac 100644 --- a/drivers/net/wireless/airo_cs.c +++ b/drivers/net/wireless/airo_cs.c @@ -180,16 +180,7 @@ static struct pcmcia_driver airo_driver = { .suspend = airo_suspend, .resume = airo_resume, }; - -static int __init airo_cs_init(void) -{ - return pcmcia_register_driver(&airo_driver); -} - -static void __exit airo_cs_cleanup(void) -{ - pcmcia_unregister_driver(&airo_driver); -} +module_pcmcia_driver(airo_driver); /* This program is free software; you can redistribute it and/or @@ -229,6 +220,3 @@ static void __exit airo_cs_cleanup(void) IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ - -module_init(airo_cs_init); -module_exit(airo_cs_cleanup); diff --git a/drivers/net/wireless/atmel_cs.c b/drivers/net/wireless/atmel_cs.c index b42930f457c2..522572219217 100644 --- a/drivers/net/wireless/atmel_cs.c +++ b/drivers/net/wireless/atmel_cs.c @@ -245,16 +245,7 @@ static struct pcmcia_driver atmel_driver = { .suspend = atmel_suspend, .resume = atmel_resume, }; - -static int __init atmel_cs_init(void) -{ - return pcmcia_register_driver(&atmel_driver); -} - -static void __exit atmel_cs_cleanup(void) -{ - pcmcia_unregister_driver(&atmel_driver); -} +module_pcmcia_driver(atmel_driver); /* This program is free software; you can redistribute it and/or @@ -294,6 +285,3 @@ static void __exit atmel_cs_cleanup(void) IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ - -module_init(atmel_cs_init); -module_exit(atmel_cs_cleanup); diff --git a/drivers/net/wireless/b43/pcmcia.c b/drivers/net/wireless/b43/pcmcia.c index f2ea2ceec8a9..55f2bd7f8f74 100644 --- a/drivers/net/wireless/b43/pcmcia.c +++ b/drivers/net/wireless/b43/pcmcia.c @@ -130,6 +130,10 @@ static struct pcmcia_driver b43_pcmcia_driver = { .resume = b43_pcmcia_resume, }; +/* + * These are not module init/exit functions! + * The module_pcmcia_driver() helper cannot be used here. + */ int b43_pcmcia_init(void) { return pcmcia_register_driver(&b43_pcmcia_driver); diff --git a/drivers/net/wireless/hostap/hostap_cs.c b/drivers/net/wireless/hostap/hostap_cs.c index 89e9d3a78c3c..56cd01ca8ad0 100644 --- a/drivers/net/wireless/hostap/hostap_cs.c +++ b/drivers/net/wireless/hostap/hostap_cs.c @@ -709,17 +709,4 @@ static struct pcmcia_driver hostap_driver = { .suspend = hostap_cs_suspend, .resume = hostap_cs_resume, }; - -static int __init init_prism2_pccard(void) -{ - return pcmcia_register_driver(&hostap_driver); -} - -static void __exit exit_prism2_pccard(void) -{ - pcmcia_unregister_driver(&hostap_driver); -} - - -module_init(init_prism2_pccard); -module_exit(exit_prism2_pccard); +module_pcmcia_driver(hostap_driver); diff --git a/drivers/net/wireless/libertas/if_cs.c b/drivers/net/wireless/libertas/if_cs.c index 16beaf39dc53..c94dd6802672 100644 --- a/drivers/net/wireless/libertas/if_cs.c +++ b/drivers/net/wireless/libertas/if_cs.c @@ -999,7 +999,6 @@ static const struct pcmcia_device_id if_cs_ids[] = { }; MODULE_DEVICE_TABLE(pcmcia, if_cs_ids); - static struct pcmcia_driver lbs_driver = { .owner = THIS_MODULE, .name = DRV_NAME, @@ -1007,26 +1006,4 @@ static struct pcmcia_driver lbs_driver = { .remove = if_cs_detach, .id_table = if_cs_ids, }; - - -static int __init if_cs_init(void) -{ - int ret; - - lbs_deb_enter(LBS_DEB_CS); - ret = pcmcia_register_driver(&lbs_driver); - lbs_deb_leave(LBS_DEB_CS); - return ret; -} - - -static void __exit if_cs_exit(void) -{ - lbs_deb_enter(LBS_DEB_CS); - pcmcia_unregister_driver(&lbs_driver); - lbs_deb_leave(LBS_DEB_CS); -} - - -module_init(if_cs_init); -module_exit(if_cs_exit); +module_pcmcia_driver(lbs_driver); diff --git a/drivers/net/wireless/orinoco/orinoco_cs.c b/drivers/net/wireless/orinoco/orinoco_cs.c index d7dbc00bcfbe..d21d95939316 100644 --- a/drivers/net/wireless/orinoco/orinoco_cs.c +++ b/drivers/net/wireless/orinoco/orinoco_cs.c @@ -338,18 +338,4 @@ static struct pcmcia_driver orinoco_driver = { .suspend = orinoco_cs_suspend, .resume = orinoco_cs_resume, }; - -static int __init -init_orinoco_cs(void) -{ - return pcmcia_register_driver(&orinoco_driver); -} - -static void __exit -exit_orinoco_cs(void) -{ - pcmcia_unregister_driver(&orinoco_driver); -} - -module_init(init_orinoco_cs); -module_exit(exit_orinoco_cs); +module_pcmcia_driver(orinoco_driver); diff --git a/drivers/net/wireless/orinoco/spectrum_cs.c b/drivers/net/wireless/orinoco/spectrum_cs.c index 6e28ee4e9c52..e2264bc12ebf 100644 --- a/drivers/net/wireless/orinoco/spectrum_cs.c +++ b/drivers/net/wireless/orinoco/spectrum_cs.c @@ -318,18 +318,4 @@ static struct pcmcia_driver orinoco_driver = { .resume = spectrum_cs_resume, .id_table = spectrum_cs_ids, }; - -static int __init -init_spectrum_cs(void) -{ - return pcmcia_register_driver(&orinoco_driver); -} - -static void __exit -exit_spectrum_cs(void) -{ - pcmcia_unregister_driver(&orinoco_driver); -} - -module_init(init_spectrum_cs); -module_exit(exit_spectrum_cs); +module_pcmcia_driver(orinoco_driver); diff --git a/drivers/net/wireless/wl3501_cs.c b/drivers/net/wireless/wl3501_cs.c index 730186d0449b..38d2089f338a 100644 --- a/drivers/net/wireless/wl3501_cs.c +++ b/drivers/net/wireless/wl3501_cs.c @@ -2013,19 +2013,7 @@ static struct pcmcia_driver wl3501_driver = { .suspend = wl3501_suspend, .resume = wl3501_resume, }; - -static int __init wl3501_init_module(void) -{ - return pcmcia_register_driver(&wl3501_driver); -} - -static void __exit wl3501_exit_module(void) -{ - pcmcia_unregister_driver(&wl3501_driver); -} - -module_init(wl3501_init_module); -module_exit(wl3501_exit_module); +module_pcmcia_driver(wl3501_driver); MODULE_AUTHOR("Fox Chen , " "Arnaldo Carvalho de Melo ," -- cgit v1.2.3 From 7fced565e55be83a18a3b7bb64995515c61edd53 Mon Sep 17 00:00:00 2001 From: Kurt Van Dijck Date: Thu, 7 Mar 2013 13:25:53 +0100 Subject: softingcs: initialize spinlock with macro Signed-off-by: Kurt Van Dijck Signed-off-by: Greg Kroah-Hartman --- drivers/net/can/softing/softing_cs.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/net/can/softing/softing_cs.c b/drivers/net/can/softing/softing_cs.c index c2c0a5bb0b21..77620543cd91 100644 --- a/drivers/net/can/softing/softing_cs.c +++ b/drivers/net/can/softing/softing_cs.c @@ -27,7 +27,7 @@ #include "softing_platform.h" static int softingcs_index; -static spinlock_t softingcs_index_lock; +static DEFINE_SPINLOCK(softingcs_index_lock); static int softingcs_reset(struct platform_device *pdev, int v); static int softingcs_enable_irq(struct platform_device *pdev, int v); @@ -342,7 +342,6 @@ static struct pcmcia_driver softingcs_driver = { static int __init softingcs_start(void) { - spin_lock_init(&softingcs_index_lock); return pcmcia_register_driver(&softingcs_driver); } -- cgit v1.2.3 From a750fa4edd9e5d840a1ada4a272601c82e56a83a Mon Sep 17 00:00:00 2001 From: Kurt Van Dijck Date: Thu, 7 Mar 2013 13:28:18 +0100 Subject: softingcs: use module_pcmcia_driver Signed-off-by: Kurt Van Dijck Signed-off-by: Greg Kroah-Hartman --- drivers/net/can/softing/softing_cs.c | 13 +------------ 1 file changed, 1 insertion(+), 12 deletions(-) (limited to 'drivers') diff --git a/drivers/net/can/softing/softing_cs.c b/drivers/net/can/softing/softing_cs.c index 77620543cd91..738355c12744 100644 --- a/drivers/net/can/softing/softing_cs.c +++ b/drivers/net/can/softing/softing_cs.c @@ -340,18 +340,7 @@ static struct pcmcia_driver softingcs_driver = { .remove = softingcs_remove, }; -static int __init softingcs_start(void) -{ - return pcmcia_register_driver(&softingcs_driver); -} - -static void __exit softingcs_stop(void) -{ - pcmcia_unregister_driver(&softingcs_driver); -} - -module_init(softingcs_start); -module_exit(softingcs_stop); +module_pcmcia_driver(&softingcs_driver); MODULE_DESCRIPTION("softing CANcard driver" ", links PCMCIA card to softing driver"); -- cgit v1.2.3 From 501ad1c49b3d8c7b7495ef044c698c22710fc27d Mon Sep 17 00:00:00 2001 From: Kurt Van Dijck Date: Mon, 18 Mar 2013 09:58:03 +0100 Subject: FIX: softingcs conversion to module_pcmcia_driver macro Reported-by: Stephen Rothwell Signed-off-by: Kurt Van Dijck Signed-off-by: Greg Kroah-Hartman --- drivers/net/can/softing/softing_cs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/can/softing/softing_cs.c b/drivers/net/can/softing/softing_cs.c index 738355c12744..498605f833dd 100644 --- a/drivers/net/can/softing/softing_cs.c +++ b/drivers/net/can/softing/softing_cs.c @@ -340,7 +340,7 @@ static struct pcmcia_driver softingcs_driver = { .remove = softingcs_remove, }; -module_pcmcia_driver(&softingcs_driver); +module_pcmcia_driver(softingcs_driver); MODULE_DESCRIPTION("softing CANcard driver" ", links PCMCIA card to softing driver"); -- cgit v1.2.3 From e44b0ceee4cc2a926225e73ac1e20b9a5bb22c2d Mon Sep 17 00:00:00 2001 From: Kenneth Heitke Date: Tue, 12 Mar 2013 11:41:46 -0700 Subject: add single-wire serial bus interface (SSBI) driver SSBI is the Qualcomm single-wire serial bus interface used to connect the MSM devices to the PMIC and other devices. Since SSBI only supports a single slave, the driver gets the name of the slave device passed in from the board file through the master device's platform data. SSBI registers pretty early (postcore), so that the PMIC can come up before the board init. This is useful if the board init requires the use of gpios that are connected through the PMIC. Based on a patch by Dima Zavin that can be found at: http://android.git.kernel.org/?p=kernel/msm.git;a=commitdiff;h=eb060bac4 This patch adds PMIC Arbiter support for the MSM8660. The PMIC Arbiter is a hardware wrapper around the SSBI 2.0 controller that is designed to overcome concurrency issues and security limitations. A controller_type field is added to the platform data to specify the type of the SSBI controller (1.0, 2.0, or PMIC Arbiter). [davidb@codeaurora.org: I've moved this driver into drivers/ssbi/ and added an include for linux/module.h so that it will compile] Signed-off-by: Kenneth Heitke Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/ssbi/Kconfig | 16 ++ drivers/ssbi/Makefile | 1 + drivers/ssbi/ssbi.c | 397 +++++++++++++++++++++++++++++++++++++++++++++++ include/linux/msm_ssbi.h | 49 ++++++ 6 files changed, 466 insertions(+) create mode 100644 drivers/ssbi/Kconfig create mode 100644 drivers/ssbi/Makefile create mode 100644 drivers/ssbi/ssbi.c create mode 100644 include/linux/msm_ssbi.h (limited to 'drivers') diff --git a/drivers/Kconfig b/drivers/Kconfig index 202fa6d051b9..78a956e286e6 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -52,6 +52,8 @@ source "drivers/i2c/Kconfig" source "drivers/spi/Kconfig" +source "drivers/ssbi/Kconfig" + source "drivers/hsi/Kconfig" source "drivers/pps/Kconfig" diff --git a/drivers/Makefile b/drivers/Makefile index dce39a95fa71..778821ba3f68 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -114,6 +114,7 @@ obj-y += firmware/ obj-$(CONFIG_CRYPTO) += crypto/ obj-$(CONFIG_SUPERH) += sh/ obj-$(CONFIG_ARCH_SHMOBILE) += sh/ +obj-$(CONFIG_MSM_SSBI) += ssbi/ ifndef CONFIG_ARCH_USES_GETTIMEOFFSET obj-y += clocksource/ endif diff --git a/drivers/ssbi/Kconfig b/drivers/ssbi/Kconfig new file mode 100644 index 000000000000..b57c41bd0119 --- /dev/null +++ b/drivers/ssbi/Kconfig @@ -0,0 +1,16 @@ +# +# MSM SSBI bus support +# + +menu "Qualcomm MSM SSBI bus support" + +config MSM_SSBI + bool "Qualcomm Single-wire Serial Bus Interface (SSBI)" + help + If you say yes to this option, support will be included for the + built-in SSBI interface on Qualcomm MSM family processors. + + This is required for communicating with Qualcomm PMICs and + other devices that have the SSBI interface. + +endmenu diff --git a/drivers/ssbi/Makefile b/drivers/ssbi/Makefile new file mode 100644 index 000000000000..22e408f45d61 --- /dev/null +++ b/drivers/ssbi/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_MSM_SSBI) += ssbi.o diff --git a/drivers/ssbi/ssbi.c b/drivers/ssbi/ssbi.c new file mode 100644 index 000000000000..8b0b10d6e1de --- /dev/null +++ b/drivers/ssbi/ssbi.c @@ -0,0 +1,397 @@ +/* Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved. + * Copyright (c) 2010, Google Inc. + * + * Original authors: Code Aurora Forum + * + * Author: Dima Zavin + * - Largely rewritten from original to not be an i2c driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#define pr_fmt(fmt) "%s: " fmt, __func__ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* SSBI 2.0 controller registers */ +#define SSBI2_CMD 0x0008 +#define SSBI2_RD 0x0010 +#define SSBI2_STATUS 0x0014 +#define SSBI2_MODE2 0x001C + +/* SSBI_CMD fields */ +#define SSBI_CMD_RDWRN (1 << 24) + +/* SSBI_STATUS fields */ +#define SSBI_STATUS_RD_READY (1 << 2) +#define SSBI_STATUS_READY (1 << 1) +#define SSBI_STATUS_MCHN_BUSY (1 << 0) + +/* SSBI_MODE2 fields */ +#define SSBI_MODE2_REG_ADDR_15_8_SHFT 0x04 +#define SSBI_MODE2_REG_ADDR_15_8_MASK (0x7f << SSBI_MODE2_REG_ADDR_15_8_SHFT) + +#define SET_SSBI_MODE2_REG_ADDR_15_8(MD, AD) \ + (((MD) & 0x0F) | ((((AD) >> 8) << SSBI_MODE2_REG_ADDR_15_8_SHFT) & \ + SSBI_MODE2_REG_ADDR_15_8_MASK)) + +/* SSBI PMIC Arbiter command registers */ +#define SSBI_PA_CMD 0x0000 +#define SSBI_PA_RD_STATUS 0x0004 + +/* SSBI_PA_CMD fields */ +#define SSBI_PA_CMD_RDWRN (1 << 24) +#define SSBI_PA_CMD_ADDR_MASK 0x7fff /* REG_ADDR_7_0, REG_ADDR_8_14*/ + +/* SSBI_PA_RD_STATUS fields */ +#define SSBI_PA_RD_STATUS_TRANS_DONE (1 << 27) +#define SSBI_PA_RD_STATUS_TRANS_DENIED (1 << 26) + +#define SSBI_TIMEOUT_US 100 + +struct msm_ssbi { + struct device *dev; + struct device *slave; + void __iomem *base; + spinlock_t lock; + enum msm_ssbi_controller_type controller_type; + int (*read)(struct msm_ssbi *, u16 addr, u8 *buf, int len); + int (*write)(struct msm_ssbi *, u16 addr, u8 *buf, int len); +}; + +#define to_msm_ssbi(dev) platform_get_drvdata(to_platform_device(dev)) + +static inline u32 ssbi_readl(struct msm_ssbi *ssbi, u32 reg) +{ + return readl(ssbi->base + reg); +} + +static inline void ssbi_writel(struct msm_ssbi *ssbi, u32 val, u32 reg) +{ + writel(val, ssbi->base + reg); +} + +static int ssbi_wait_mask(struct msm_ssbi *ssbi, u32 set_mask, u32 clr_mask) +{ + u32 timeout = SSBI_TIMEOUT_US; + u32 val; + + while (timeout--) { + val = ssbi_readl(ssbi, SSBI2_STATUS); + if (((val & set_mask) == set_mask) && ((val & clr_mask) == 0)) + return 0; + udelay(1); + } + + dev_err(ssbi->dev, "%s: timeout (status %x set_mask %x clr_mask %x)\n", + __func__, ssbi_readl(ssbi, SSBI2_STATUS), set_mask, clr_mask); + return -ETIMEDOUT; +} + +static int +msm_ssbi_read_bytes(struct msm_ssbi *ssbi, u16 addr, u8 *buf, int len) +{ + u32 cmd = SSBI_CMD_RDWRN | ((addr & 0xff) << 16); + int ret = 0; + + if (ssbi->controller_type == MSM_SBI_CTRL_SSBI2) { + u32 mode2 = ssbi_readl(ssbi, SSBI2_MODE2); + mode2 = SET_SSBI_MODE2_REG_ADDR_15_8(mode2, addr); + ssbi_writel(ssbi, mode2, SSBI2_MODE2); + } + + while (len) { + ret = ssbi_wait_mask(ssbi, SSBI_STATUS_READY, 0); + if (ret) + goto err; + + ssbi_writel(ssbi, cmd, SSBI2_CMD); + ret = ssbi_wait_mask(ssbi, SSBI_STATUS_RD_READY, 0); + if (ret) + goto err; + *buf++ = ssbi_readl(ssbi, SSBI2_RD) & 0xff; + len--; + } + +err: + return ret; +} + +static int +msm_ssbi_write_bytes(struct msm_ssbi *ssbi, u16 addr, u8 *buf, int len) +{ + int ret = 0; + + if (ssbi->controller_type == MSM_SBI_CTRL_SSBI2) { + u32 mode2 = ssbi_readl(ssbi, SSBI2_MODE2); + mode2 = SET_SSBI_MODE2_REG_ADDR_15_8(mode2, addr); + ssbi_writel(ssbi, mode2, SSBI2_MODE2); + } + + while (len) { + ret = ssbi_wait_mask(ssbi, SSBI_STATUS_READY, 0); + if (ret) + goto err; + + ssbi_writel(ssbi, ((addr & 0xff) << 16) | *buf, SSBI2_CMD); + ret = ssbi_wait_mask(ssbi, 0, SSBI_STATUS_MCHN_BUSY); + if (ret) + goto err; + buf++; + len--; + } + +err: + return ret; +} + +static inline int +msm_ssbi_pa_transfer(struct msm_ssbi *ssbi, u32 cmd, u8 *data) +{ + u32 timeout = SSBI_TIMEOUT_US; + u32 rd_status = 0; + + ssbi_writel(ssbi, cmd, SSBI_PA_CMD); + + while (timeout--) { + rd_status = ssbi_readl(ssbi, SSBI_PA_RD_STATUS); + + if (rd_status & SSBI_PA_RD_STATUS_TRANS_DENIED) { + dev_err(ssbi->dev, "%s: transaction denied (0x%x)\n", + __func__, rd_status); + return -EPERM; + } + + if (rd_status & SSBI_PA_RD_STATUS_TRANS_DONE) { + if (data) + *data = rd_status & 0xff; + return 0; + } + udelay(1); + } + + dev_err(ssbi->dev, "%s: timeout, status 0x%x\n", __func__, rd_status); + return -ETIMEDOUT; +} + +static int +msm_ssbi_pa_read_bytes(struct msm_ssbi *ssbi, u16 addr, u8 *buf, int len) +{ + u32 cmd; + int ret = 0; + + cmd = SSBI_PA_CMD_RDWRN | (addr & SSBI_PA_CMD_ADDR_MASK) << 8; + + while (len) { + ret = msm_ssbi_pa_transfer(ssbi, cmd, buf); + if (ret) + goto err; + buf++; + len--; + } + +err: + return ret; +} + +static int +msm_ssbi_pa_write_bytes(struct msm_ssbi *ssbi, u16 addr, u8 *buf, int len) +{ + u32 cmd; + int ret = 0; + + while (len) { + cmd = (addr & SSBI_PA_CMD_ADDR_MASK) << 8 | *buf; + ret = msm_ssbi_pa_transfer(ssbi, cmd, NULL); + if (ret) + goto err; + buf++; + len--; + } + +err: + return ret; +} + +int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len) +{ + struct msm_ssbi *ssbi = to_msm_ssbi(dev); + unsigned long flags; + int ret; + + if (ssbi->dev != dev) + return -ENXIO; + + spin_lock_irqsave(&ssbi->lock, flags); + ret = ssbi->read(ssbi, addr, buf, len); + spin_unlock_irqrestore(&ssbi->lock, flags); + + return ret; +} +EXPORT_SYMBOL(msm_ssbi_read); + +int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len) +{ + struct msm_ssbi *ssbi = to_msm_ssbi(dev); + unsigned long flags; + int ret; + + if (ssbi->dev != dev) + return -ENXIO; + + spin_lock_irqsave(&ssbi->lock, flags); + ret = ssbi->write(ssbi, addr, buf, len); + spin_unlock_irqrestore(&ssbi->lock, flags); + + return ret; +} +EXPORT_SYMBOL(msm_ssbi_write); + +static int msm_ssbi_add_slave(struct msm_ssbi *ssbi, + const struct msm_ssbi_slave_info *slave) +{ + struct platform_device *slave_pdev; + int ret; + + if (ssbi->slave) { + pr_err("slave already attached??\n"); + return -EBUSY; + } + + slave_pdev = platform_device_alloc(slave->name, -1); + if (!slave_pdev) { + pr_err("cannot allocate pdev for slave '%s'", slave->name); + ret = -ENOMEM; + goto err; + } + + slave_pdev->dev.parent = ssbi->dev; + slave_pdev->dev.platform_data = slave->platform_data; + + ret = platform_device_add(slave_pdev); + if (ret) { + pr_err("cannot add slave platform device for '%s'\n", + slave->name); + goto err; + } + + ssbi->slave = &slave_pdev->dev; + return 0; + +err: + if (slave_pdev) + platform_device_put(slave_pdev); + return ret; +} + +static int msm_ssbi_probe(struct platform_device *pdev) +{ + const struct msm_ssbi_platform_data *pdata = pdev->dev.platform_data; + struct resource *mem_res; + struct msm_ssbi *ssbi; + int ret = 0; + + if (!pdata) { + pr_err("missing platform data\n"); + return -EINVAL; + } + + pr_debug("%s\n", pdata->slave.name); + + ssbi = kzalloc(sizeof(struct msm_ssbi), GFP_KERNEL); + if (!ssbi) { + pr_err("can not allocate ssbi_data\n"); + return -ENOMEM; + } + + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem_res) { + pr_err("missing mem resource\n"); + ret = -EINVAL; + goto err_get_mem_res; + } + + ssbi->base = ioremap(mem_res->start, resource_size(mem_res)); + if (!ssbi->base) { + pr_err("ioremap of 0x%p failed\n", (void *)mem_res->start); + ret = -EINVAL; + goto err_ioremap; + } + ssbi->dev = &pdev->dev; + platform_set_drvdata(pdev, ssbi); + + ssbi->controller_type = pdata->controller_type; + if (ssbi->controller_type == MSM_SBI_CTRL_PMIC_ARBITER) { + ssbi->read = msm_ssbi_pa_read_bytes; + ssbi->write = msm_ssbi_pa_write_bytes; + } else { + ssbi->read = msm_ssbi_read_bytes; + ssbi->write = msm_ssbi_write_bytes; + } + + spin_lock_init(&ssbi->lock); + + ret = msm_ssbi_add_slave(ssbi, &pdata->slave); + if (ret) + goto err_ssbi_add_slave; + + return 0; + +err_ssbi_add_slave: + platform_set_drvdata(pdev, NULL); + iounmap(ssbi->base); +err_ioremap: +err_get_mem_res: + kfree(ssbi); + return ret; +} + +static int msm_ssbi_remove(struct platform_device *pdev) +{ + struct msm_ssbi *ssbi = platform_get_drvdata(pdev); + + platform_set_drvdata(pdev, NULL); + iounmap(ssbi->base); + kfree(ssbi); + return 0; +} + +static struct platform_driver msm_ssbi_driver = { + .probe = msm_ssbi_probe, + .remove = __exit_p(msm_ssbi_remove), + .driver = { + .name = "msm_ssbi", + .owner = THIS_MODULE, + }, +}; + +static int __init msm_ssbi_init(void) +{ + return platform_driver_register(&msm_ssbi_driver); +} +postcore_initcall(msm_ssbi_init); + +static void __exit msm_ssbi_exit(void) +{ + platform_driver_unregister(&msm_ssbi_driver); +} +module_exit(msm_ssbi_exit) + +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("1.0"); +MODULE_ALIAS("platform:msm_ssbi"); +MODULE_AUTHOR("Dima Zavin "); diff --git a/include/linux/msm_ssbi.h b/include/linux/msm_ssbi.h new file mode 100644 index 000000000000..cfa47df6d003 --- /dev/null +++ b/include/linux/msm_ssbi.h @@ -0,0 +1,49 @@ +/* Copyright (C) 2010 Google, Inc. + * Copyright (c) 2011, Code Aurora Forum. All rights reserved. + * Author: Dima Zavin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _LINUX_MSM_SSBI_H +#define _LINUX_MSM_SSBI_H + +#include + +struct msm_ssbi_slave_info { + const char *name; + void *platform_data; +}; + +enum msm_ssbi_controller_type { + MSM_SBI_CTRL_SSBI = 0, + MSM_SBI_CTRL_SSBI2, + MSM_SBI_CTRL_PMIC_ARBITER, +}; + +struct msm_ssbi_platform_data { + struct msm_ssbi_slave_info slave; + enum msm_ssbi_controller_type controller_type; +}; + +#ifdef CONFIG_MSM_SSBI +int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len); +int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len); +#else +static inline int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len) +{ + return -ENXIO; +} +static inline int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len) +{ + return -ENXIO; +} +#endif +#endif -- cgit v1.2.3 From a1a906c5721f05252e0dbd4b11ef25539d7bd9d0 Mon Sep 17 00:00:00 2001 From: David Brown Date: Tue, 12 Mar 2013 11:41:47 -0700 Subject: fix: Use EXPORT_SYMBOL_GPL Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- drivers/ssbi/ssbi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/ssbi/ssbi.c b/drivers/ssbi/ssbi.c index 8b0b10d6e1de..c08a7b859d74 100644 --- a/drivers/ssbi/ssbi.c +++ b/drivers/ssbi/ssbi.c @@ -242,7 +242,7 @@ int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len) return ret; } -EXPORT_SYMBOL(msm_ssbi_read); +EXPORT_SYMBOL_GPL(msm_ssbi_read); int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len) { @@ -259,7 +259,7 @@ int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len) return ret; } -EXPORT_SYMBOL(msm_ssbi_write); +EXPORT_SYMBOL_GPL(msm_ssbi_write); static int msm_ssbi_add_slave(struct msm_ssbi *ssbi, const struct msm_ssbi_slave_info *slave) -- cgit v1.2.3 From 7b67d5610879c8f1851a47fd5adfe7e924f3fe53 Mon Sep 17 00:00:00 2001 From: David Brown Date: Tue, 12 Mar 2013 11:41:48 -0700 Subject: ssbi: Fix exit mismatch in remove function msm_ssbi_remove is referenced with __exit_p, but not declared with __exit. This causes a warning when the driver is not built as a module: drivers/ssbi/ssbi.c:341:23: warning: 'msm_ssbi_remove' defined but not used [-Wunused-function] The remove is needed for unbinding to work, even if not compiled as a module, so just remove it. Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- drivers/ssbi/ssbi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/ssbi/ssbi.c b/drivers/ssbi/ssbi.c index c08a7b859d74..da086d49d35c 100644 --- a/drivers/ssbi/ssbi.c +++ b/drivers/ssbi/ssbi.c @@ -372,7 +372,7 @@ static int msm_ssbi_remove(struct platform_device *pdev) static struct platform_driver msm_ssbi_driver = { .probe = msm_ssbi_probe, - .remove = __exit_p(msm_ssbi_remove), + .remove = msm_ssbi_remove, .driver = { .name = "msm_ssbi", .owner = THIS_MODULE, -- cgit v1.2.3 From 4a6692e2ac4c6b09235a9568468dd83a380c271d Mon Sep 17 00:00:00 2001 From: David Brown Date: Tue, 12 Mar 2013 11:41:49 -0700 Subject: ssbi: Allow compilation as a module The ssbi driver's read/write entry points are protected with wrappers in the case when the driver isn't enabled. These wrappers don't make any sense, since a client of the SSBI bus won't work without it. Make these just regular functions, so that the SSBI driver can be built as a module. Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- drivers/ssbi/Kconfig | 2 +- include/linux/msm_ssbi.h | 11 ----------- 2 files changed, 1 insertion(+), 12 deletions(-) (limited to 'drivers') diff --git a/drivers/ssbi/Kconfig b/drivers/ssbi/Kconfig index b57c41bd0119..c7bc534ddf50 100644 --- a/drivers/ssbi/Kconfig +++ b/drivers/ssbi/Kconfig @@ -5,7 +5,7 @@ menu "Qualcomm MSM SSBI bus support" config MSM_SSBI - bool "Qualcomm Single-wire Serial Bus Interface (SSBI)" + tristate "Qualcomm Single-wire Serial Bus Interface (SSBI)" help If you say yes to this option, support will be included for the built-in SSBI interface on Qualcomm MSM family processors. diff --git a/include/linux/msm_ssbi.h b/include/linux/msm_ssbi.h index cfa47df6d003..0fe245bb2940 100644 --- a/include/linux/msm_ssbi.h +++ b/include/linux/msm_ssbi.h @@ -33,17 +33,6 @@ struct msm_ssbi_platform_data { enum msm_ssbi_controller_type controller_type; }; -#ifdef CONFIG_MSM_SSBI int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len); int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len); -#else -static inline int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len) -{ - return -ENXIO; -} -static inline int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len) -{ - return -ENXIO; -} -#endif #endif -- cgit v1.2.3 From 97f00f7120fe3396302693cdc4b1d11bbacad963 Mon Sep 17 00:00:00 2001 From: David Brown Date: Tue, 12 Mar 2013 11:41:50 -0700 Subject: SSBI: Convert SSBI to device tree The SSBI bus is exclusive to the Qualcomm MSM targets, and all SoCs using it will be using device tree. Convert this driver to indentify with device tree. This makes the bus probing a good bit simpler, since the attaching of child nodes can be represented directly in the devicetree, rather than having to be inferred by name. Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- Documentation/devicetree/bindings/arm/msm/ssbi.txt | 18 +++++ arch/arm/boot/dts/msm8660-surf.dts | 6 ++ arch/arm/boot/dts/msm8960-cdp.dts | 6 ++ drivers/ssbi/ssbi.c | 81 +++++++++------------- 4 files changed, 62 insertions(+), 49 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/msm/ssbi.txt (limited to 'drivers') diff --git a/Documentation/devicetree/bindings/arm/msm/ssbi.txt b/Documentation/devicetree/bindings/arm/msm/ssbi.txt new file mode 100644 index 000000000000..54fd5ced3401 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/msm/ssbi.txt @@ -0,0 +1,18 @@ +* Qualcomm SSBI + +Some Qualcomm MSM devices contain a point-to-point serial bus used to +communicate with a limited range of devices (mostly power management +chips). + +These require the following properties: + +- compatible: "qcom,ssbi" + +- qcom,controller-type + indicates the SSBI bus variant the controller should use to talk + with the slave device. This should be one of "ssbi", "ssbi2", or + "pmic-arbiter". The type chosen is determined by the attached + slave. + +The slave device should be the single child node of the ssbi device +with a compatible field. diff --git a/arch/arm/boot/dts/msm8660-surf.dts b/arch/arm/boot/dts/msm8660-surf.dts index 31f2157cd7d7..67f8670c4d6a 100644 --- a/arch/arm/boot/dts/msm8660-surf.dts +++ b/arch/arm/boot/dts/msm8660-surf.dts @@ -38,4 +38,10 @@ <0x19c00000 0x1000>; interrupts = <0 195 0x0>; }; + + qcom,ssbi@500000 { + compatible = "qcom,ssbi"; + reg = <0x500000 0x1000>; + qcom,controller-type = "pmic-arbiter"; + }; }; diff --git a/arch/arm/boot/dts/msm8960-cdp.dts b/arch/arm/boot/dts/msm8960-cdp.dts index 9e621b5ad3dd..c9b09a813a4b 100644 --- a/arch/arm/boot/dts/msm8960-cdp.dts +++ b/arch/arm/boot/dts/msm8960-cdp.dts @@ -38,4 +38,10 @@ <0x16400000 0x1000>; interrupts = <0 154 0x0>; }; + + qcom,ssbi@500000 { + compatible = "qcom,ssbi"; + reg = <0x500000 0x1000>; + qcom,controller-type = "pmic-arbiter"; + }; }; diff --git a/drivers/ssbi/ssbi.c b/drivers/ssbi/ssbi.c index da086d49d35c..6fbcb25907ff 100644 --- a/drivers/ssbi/ssbi.c +++ b/drivers/ssbi/ssbi.c @@ -26,6 +26,8 @@ #include #include #include +#include +#include /* SSBI 2.0 controller registers */ #define SSBI2_CMD 0x0008 @@ -261,56 +263,13 @@ int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len) } EXPORT_SYMBOL_GPL(msm_ssbi_write); -static int msm_ssbi_add_slave(struct msm_ssbi *ssbi, - const struct msm_ssbi_slave_info *slave) -{ - struct platform_device *slave_pdev; - int ret; - - if (ssbi->slave) { - pr_err("slave already attached??\n"); - return -EBUSY; - } - - slave_pdev = platform_device_alloc(slave->name, -1); - if (!slave_pdev) { - pr_err("cannot allocate pdev for slave '%s'", slave->name); - ret = -ENOMEM; - goto err; - } - - slave_pdev->dev.parent = ssbi->dev; - slave_pdev->dev.platform_data = slave->platform_data; - - ret = platform_device_add(slave_pdev); - if (ret) { - pr_err("cannot add slave platform device for '%s'\n", - slave->name); - goto err; - } - - ssbi->slave = &slave_pdev->dev; - return 0; - -err: - if (slave_pdev) - platform_device_put(slave_pdev); - return ret; -} - static int msm_ssbi_probe(struct platform_device *pdev) { - const struct msm_ssbi_platform_data *pdata = pdev->dev.platform_data; + struct device_node *np = pdev->dev.of_node; struct resource *mem_res; struct msm_ssbi *ssbi; int ret = 0; - - if (!pdata) { - pr_err("missing platform data\n"); - return -EINVAL; - } - - pr_debug("%s\n", pdata->slave.name); + const char *type; ssbi = kzalloc(sizeof(struct msm_ssbi), GFP_KERNEL); if (!ssbi) { @@ -334,7 +293,25 @@ static int msm_ssbi_probe(struct platform_device *pdev) ssbi->dev = &pdev->dev; platform_set_drvdata(pdev, ssbi); - ssbi->controller_type = pdata->controller_type; + type = of_get_property(np, "qcom,controller-type", NULL); + if (type == NULL) { + pr_err("Missing qcom,controller-type property\n"); + ret = -EINVAL; + goto err_ssbi_controller; + } + dev_info(&pdev->dev, "SSBI controller type: '%s'\n", type); + if (strcmp(type, "ssbi") == 0) + ssbi->controller_type = MSM_SBI_CTRL_SSBI; + else if (strcmp(type, "ssbi2") == 0) + ssbi->controller_type = MSM_SBI_CTRL_SSBI2; + else if (strcmp(type, "pmic-arbiter") == 0) + ssbi->controller_type = MSM_SBI_CTRL_PMIC_ARBITER; + else { + pr_err("Unknown qcom,controller-type\n"); + ret = -EINVAL; + goto err_ssbi_controller; + } + if (ssbi->controller_type == MSM_SBI_CTRL_PMIC_ARBITER) { ssbi->read = msm_ssbi_pa_read_bytes; ssbi->write = msm_ssbi_pa_write_bytes; @@ -345,13 +322,13 @@ static int msm_ssbi_probe(struct platform_device *pdev) spin_lock_init(&ssbi->lock); - ret = msm_ssbi_add_slave(ssbi, &pdata->slave); + ret = of_platform_populate(np, NULL, NULL, &pdev->dev); if (ret) - goto err_ssbi_add_slave; + goto err_ssbi_controller; return 0; -err_ssbi_add_slave: +err_ssbi_controller: platform_set_drvdata(pdev, NULL); iounmap(ssbi->base); err_ioremap: @@ -370,12 +347,18 @@ static int msm_ssbi_remove(struct platform_device *pdev) return 0; } +static struct of_device_id ssbi_match_table[] = { + { .compatible = "qcom,ssbi" }, + {} +}; + static struct platform_driver msm_ssbi_driver = { .probe = msm_ssbi_probe, .remove = msm_ssbi_remove, .driver = { .name = "msm_ssbi", .owner = THIS_MODULE, + .of_match_table = ssbi_match_table, }, }; -- cgit v1.2.3 From 3f7a73b57c2f57aa25342ebdb7312f78c68502eb Mon Sep 17 00:00:00 2001 From: David Brown Date: Tue, 12 Mar 2013 11:41:51 -0700 Subject: ssbi: Comment the use of udelay() The ssbi driver uses a busywait loop to read its status register. Add a comment explaining the timing of the device itself so that future developers can better understand this delay, and possibly diagnose any problems. Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- drivers/ssbi/ssbi.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers') diff --git a/drivers/ssbi/ssbi.c b/drivers/ssbi/ssbi.c index 6fbcb25907ff..7ae892590c75 100644 --- a/drivers/ssbi/ssbi.c +++ b/drivers/ssbi/ssbi.c @@ -87,6 +87,15 @@ static inline void ssbi_writel(struct msm_ssbi *ssbi, u32 val, u32 reg) writel(val, ssbi->base + reg); } +/* + * Via private exchange with one of the original authors, the hardware + * should generally finish a transaction in about 5us. The worst + * case, is when using the arbiter and both other CPUs have just + * started trying to use the SSBI bus will result in a time of about + * 20us. It should never take longer than this. + * + * As such, this wait merely spins, with a udelay. + */ static int ssbi_wait_mask(struct msm_ssbi *ssbi, u32 set_mask, u32 clr_mask) { u32 timeout = SSBI_TIMEOUT_US; @@ -161,6 +170,10 @@ err: return ret; } +/* + * See ssbi_wait_mask for an explanation of the time and the + * busywait. + */ static inline int msm_ssbi_pa_transfer(struct msm_ssbi *ssbi, u32 cmd, u8 *data) { -- cgit v1.2.3 From 90f2d32ca5ca4a7f6d4eb509b81a9a802eb62905 Mon Sep 17 00:00:00 2001 From: David Brown Date: Tue, 12 Mar 2013 11:41:52 -0700 Subject: ssbi: Use regular init level With device tree, and deferred probe, it is no longer necessary to make sure that the ssbi bus driver is initialized very early. Restore to a regular module_init(). Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- drivers/ssbi/ssbi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/ssbi/ssbi.c b/drivers/ssbi/ssbi.c index 7ae892590c75..6878e550fde6 100644 --- a/drivers/ssbi/ssbi.c +++ b/drivers/ssbi/ssbi.c @@ -379,7 +379,7 @@ static int __init msm_ssbi_init(void) { return platform_driver_register(&msm_ssbi_driver); } -postcore_initcall(msm_ssbi_init); +module_init(msm_ssbi_init); static void __exit msm_ssbi_exit(void) { -- cgit v1.2.3 From 37799ef4fa95ceec09b5c214fb281c6e6acddf5b Mon Sep 17 00:00:00 2001 From: David Brown Date: Tue, 12 Mar 2013 11:41:53 -0700 Subject: ssbi: Remove extraneous logging Remove some unhelpful error logs. This also removes the necessity of having a pointer back to the struct device within the ssbi-specific structure Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- drivers/ssbi/ssbi.c | 16 +--------------- 1 file changed, 1 insertion(+), 15 deletions(-) (limited to 'drivers') diff --git a/drivers/ssbi/ssbi.c b/drivers/ssbi/ssbi.c index 6878e550fde6..b056a072c3b3 100644 --- a/drivers/ssbi/ssbi.c +++ b/drivers/ssbi/ssbi.c @@ -66,7 +66,6 @@ #define SSBI_TIMEOUT_US 100 struct msm_ssbi { - struct device *dev; struct device *slave; void __iomem *base; spinlock_t lock; @@ -108,8 +107,6 @@ static int ssbi_wait_mask(struct msm_ssbi *ssbi, u32 set_mask, u32 clr_mask) udelay(1); } - dev_err(ssbi->dev, "%s: timeout (status %x set_mask %x clr_mask %x)\n", - __func__, ssbi_readl(ssbi, SSBI2_STATUS), set_mask, clr_mask); return -ETIMEDOUT; } @@ -185,11 +182,8 @@ msm_ssbi_pa_transfer(struct msm_ssbi *ssbi, u32 cmd, u8 *data) while (timeout--) { rd_status = ssbi_readl(ssbi, SSBI_PA_RD_STATUS); - if (rd_status & SSBI_PA_RD_STATUS_TRANS_DENIED) { - dev_err(ssbi->dev, "%s: transaction denied (0x%x)\n", - __func__, rd_status); + if (rd_status & SSBI_PA_RD_STATUS_TRANS_DENIED) return -EPERM; - } if (rd_status & SSBI_PA_RD_STATUS_TRANS_DONE) { if (data) @@ -199,7 +193,6 @@ msm_ssbi_pa_transfer(struct msm_ssbi *ssbi, u32 cmd, u8 *data) udelay(1); } - dev_err(ssbi->dev, "%s: timeout, status 0x%x\n", __func__, rd_status); return -ETIMEDOUT; } @@ -248,9 +241,6 @@ int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len) unsigned long flags; int ret; - if (ssbi->dev != dev) - return -ENXIO; - spin_lock_irqsave(&ssbi->lock, flags); ret = ssbi->read(ssbi, addr, buf, len); spin_unlock_irqrestore(&ssbi->lock, flags); @@ -265,9 +255,6 @@ int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len) unsigned long flags; int ret; - if (ssbi->dev != dev) - return -ENXIO; - spin_lock_irqsave(&ssbi->lock, flags); ret = ssbi->write(ssbi, addr, buf, len); spin_unlock_irqrestore(&ssbi->lock, flags); @@ -303,7 +290,6 @@ static int msm_ssbi_probe(struct platform_device *pdev) ret = -EINVAL; goto err_ioremap; } - ssbi->dev = &pdev->dev; platform_set_drvdata(pdev, ssbi); type = of_get_property(np, "qcom,controller-type", NULL); -- cgit v1.2.3 From ce44bf5b5544cbe6358abb01f039361a99b80901 Mon Sep 17 00:00:00 2001 From: David Brown Date: Tue, 12 Mar 2013 11:41:54 -0700 Subject: SSBI: Remove MSM_ prefix from SSBI drivers Although the SSBI sub is currently only used on MSM SoCs, it is still a bus in its own right. Remove this msm_ prefix from the driver and it's symbols. Clients can now refer directly to ssbi_write() and ssbi_read(). Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- drivers/Makefile | 2 +- drivers/mfd/Kconfig | 2 +- drivers/mfd/pm8921-core.c | 14 ++++---- drivers/ssbi/Kconfig | 4 +-- drivers/ssbi/Makefile | 2 +- drivers/ssbi/ssbi.c | 86 +++++++++++++++++++++++------------------------ include/linux/msm_ssbi.h | 38 --------------------- include/linux/ssbi.h | 38 +++++++++++++++++++++ 8 files changed, 93 insertions(+), 93 deletions(-) delete mode 100644 include/linux/msm_ssbi.h create mode 100644 include/linux/ssbi.h (limited to 'drivers') diff --git a/drivers/Makefile b/drivers/Makefile index 778821ba3f68..4865ed24708a 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -114,7 +114,7 @@ obj-y += firmware/ obj-$(CONFIG_CRYPTO) += crypto/ obj-$(CONFIG_SUPERH) += sh/ obj-$(CONFIG_ARCH_SHMOBILE) += sh/ -obj-$(CONFIG_MSM_SSBI) += ssbi/ +obj-$(CONFIG_SSBI) += ssbi/ ifndef CONFIG_ARCH_USES_GETTIMEOFFSET obj-y += clocksource/ endif diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 671f5b171c73..5bfa7bb555b7 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -990,7 +990,7 @@ config MFD_PM8XXX config MFD_PM8921_CORE tristate "Qualcomm PM8921 PMIC chip" - depends on MSM_SSBI + depends on SSBI select MFD_CORE select MFD_PM8XXX help diff --git a/drivers/mfd/pm8921-core.c b/drivers/mfd/pm8921-core.c index d4b297cbd801..ecc137ffa8c3 100644 --- a/drivers/mfd/pm8921-core.c +++ b/drivers/mfd/pm8921-core.c @@ -17,7 +17,7 @@ #include #include #include -#include +#include #include #include #include @@ -35,7 +35,7 @@ static int pm8921_readb(const struct device *dev, u16 addr, u8 *val) const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; - return msm_ssbi_read(pmic->dev->parent, addr, val, 1); + return ssbi_read(pmic->dev->parent, addr, val, 1); } static int pm8921_writeb(const struct device *dev, u16 addr, u8 val) @@ -43,7 +43,7 @@ static int pm8921_writeb(const struct device *dev, u16 addr, u8 val) const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; - return msm_ssbi_write(pmic->dev->parent, addr, &val, 1); + return ssbi_write(pmic->dev->parent, addr, &val, 1); } static int pm8921_read_buf(const struct device *dev, u16 addr, u8 *buf, @@ -52,7 +52,7 @@ static int pm8921_read_buf(const struct device *dev, u16 addr, u8 *buf, const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; - return msm_ssbi_read(pmic->dev->parent, addr, buf, cnt); + return ssbi_read(pmic->dev->parent, addr, buf, cnt); } static int pm8921_write_buf(const struct device *dev, u16 addr, u8 *buf, @@ -61,7 +61,7 @@ static int pm8921_write_buf(const struct device *dev, u16 addr, u8 *buf, const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data; - return msm_ssbi_write(pmic->dev->parent, addr, buf, cnt); + return ssbi_write(pmic->dev->parent, addr, buf, cnt); } static int pm8921_read_irq_stat(const struct device *dev, int irq) @@ -124,7 +124,7 @@ static int pm8921_probe(struct platform_device *pdev) } /* Read PMIC chip revision */ - rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV, &val, sizeof(val)); + rc = ssbi_read(pdev->dev.parent, REG_HWREV, &val, sizeof(val)); if (rc) { pr_err("Failed to read hw rev reg %d:rc=%d\n", REG_HWREV, rc); goto err_read_rev; @@ -133,7 +133,7 @@ static int pm8921_probe(struct platform_device *pdev) rev = val; /* Read PMIC chip revision 2 */ - rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV_2, &val, sizeof(val)); + rc = ssbi_read(pdev->dev.parent, REG_HWREV_2, &val, sizeof(val)); if (rc) { pr_err("Failed to read hw rev 2 reg %d:rc=%d\n", REG_HWREV_2, rc); diff --git a/drivers/ssbi/Kconfig b/drivers/ssbi/Kconfig index c7bc534ddf50..1ae4040afedd 100644 --- a/drivers/ssbi/Kconfig +++ b/drivers/ssbi/Kconfig @@ -1,10 +1,10 @@ # -# MSM SSBI bus support +# SSBI bus support # menu "Qualcomm MSM SSBI bus support" -config MSM_SSBI +config SSBI tristate "Qualcomm Single-wire Serial Bus Interface (SSBI)" help If you say yes to this option, support will be included for the diff --git a/drivers/ssbi/Makefile b/drivers/ssbi/Makefile index 22e408f45d61..38fb70c31caf 100644 --- a/drivers/ssbi/Makefile +++ b/drivers/ssbi/Makefile @@ -1 +1 @@ -obj-$(CONFIG_MSM_SSBI) += ssbi.o +obj-$(CONFIG_SSBI) += ssbi.o diff --git a/drivers/ssbi/ssbi.c b/drivers/ssbi/ssbi.c index b056a072c3b3..f32da0258a8e 100644 --- a/drivers/ssbi/ssbi.c +++ b/drivers/ssbi/ssbi.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved. +/* Copyright (c) 2009-2013, The Linux Foundation. All rights reserved. * Copyright (c) 2010, Google Inc. * * Original authors: Code Aurora Forum @@ -24,7 +24,7 @@ #include #include #include -#include +#include #include #include #include @@ -65,23 +65,23 @@ #define SSBI_TIMEOUT_US 100 -struct msm_ssbi { +struct ssbi { struct device *slave; void __iomem *base; spinlock_t lock; - enum msm_ssbi_controller_type controller_type; - int (*read)(struct msm_ssbi *, u16 addr, u8 *buf, int len); - int (*write)(struct msm_ssbi *, u16 addr, u8 *buf, int len); + enum ssbi_controller_type controller_type; + int (*read)(struct ssbi *, u16 addr, u8 *buf, int len); + int (*write)(struct ssbi *, u16 addr, u8 *buf, int len); }; -#define to_msm_ssbi(dev) platform_get_drvdata(to_platform_device(dev)) +#define to_ssbi(dev) platform_get_drvdata(to_platform_device(dev)) -static inline u32 ssbi_readl(struct msm_ssbi *ssbi, u32 reg) +static inline u32 ssbi_readl(struct ssbi *ssbi, u32 reg) { return readl(ssbi->base + reg); } -static inline void ssbi_writel(struct msm_ssbi *ssbi, u32 val, u32 reg) +static inline void ssbi_writel(struct ssbi *ssbi, u32 val, u32 reg) { writel(val, ssbi->base + reg); } @@ -95,7 +95,7 @@ static inline void ssbi_writel(struct msm_ssbi *ssbi, u32 val, u32 reg) * * As such, this wait merely spins, with a udelay. */ -static int ssbi_wait_mask(struct msm_ssbi *ssbi, u32 set_mask, u32 clr_mask) +static int ssbi_wait_mask(struct ssbi *ssbi, u32 set_mask, u32 clr_mask) { u32 timeout = SSBI_TIMEOUT_US; u32 val; @@ -111,7 +111,7 @@ static int ssbi_wait_mask(struct msm_ssbi *ssbi, u32 set_mask, u32 clr_mask) } static int -msm_ssbi_read_bytes(struct msm_ssbi *ssbi, u16 addr, u8 *buf, int len) +ssbi_read_bytes(struct ssbi *ssbi, u16 addr, u8 *buf, int len) { u32 cmd = SSBI_CMD_RDWRN | ((addr & 0xff) << 16); int ret = 0; @@ -140,7 +140,7 @@ err: } static int -msm_ssbi_write_bytes(struct msm_ssbi *ssbi, u16 addr, u8 *buf, int len) +ssbi_write_bytes(struct ssbi *ssbi, u16 addr, u8 *buf, int len) { int ret = 0; @@ -172,7 +172,7 @@ err: * busywait. */ static inline int -msm_ssbi_pa_transfer(struct msm_ssbi *ssbi, u32 cmd, u8 *data) +ssbi_pa_transfer(struct ssbi *ssbi, u32 cmd, u8 *data) { u32 timeout = SSBI_TIMEOUT_US; u32 rd_status = 0; @@ -197,7 +197,7 @@ msm_ssbi_pa_transfer(struct msm_ssbi *ssbi, u32 cmd, u8 *data) } static int -msm_ssbi_pa_read_bytes(struct msm_ssbi *ssbi, u16 addr, u8 *buf, int len) +ssbi_pa_read_bytes(struct ssbi *ssbi, u16 addr, u8 *buf, int len) { u32 cmd; int ret = 0; @@ -205,7 +205,7 @@ msm_ssbi_pa_read_bytes(struct msm_ssbi *ssbi, u16 addr, u8 *buf, int len) cmd = SSBI_PA_CMD_RDWRN | (addr & SSBI_PA_CMD_ADDR_MASK) << 8; while (len) { - ret = msm_ssbi_pa_transfer(ssbi, cmd, buf); + ret = ssbi_pa_transfer(ssbi, cmd, buf); if (ret) goto err; buf++; @@ -217,14 +217,14 @@ err: } static int -msm_ssbi_pa_write_bytes(struct msm_ssbi *ssbi, u16 addr, u8 *buf, int len) +ssbi_pa_write_bytes(struct ssbi *ssbi, u16 addr, u8 *buf, int len) { u32 cmd; int ret = 0; while (len) { cmd = (addr & SSBI_PA_CMD_ADDR_MASK) << 8 | *buf; - ret = msm_ssbi_pa_transfer(ssbi, cmd, NULL); + ret = ssbi_pa_transfer(ssbi, cmd, NULL); if (ret) goto err; buf++; @@ -235,9 +235,9 @@ err: return ret; } -int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len) +int ssbi_read(struct device *dev, u16 addr, u8 *buf, int len) { - struct msm_ssbi *ssbi = to_msm_ssbi(dev); + struct ssbi *ssbi = to_ssbi(dev); unsigned long flags; int ret; @@ -247,11 +247,11 @@ int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len) return ret; } -EXPORT_SYMBOL_GPL(msm_ssbi_read); +EXPORT_SYMBOL_GPL(ssbi_read); -int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len) +int ssbi_write(struct device *dev, u16 addr, u8 *buf, int len) { - struct msm_ssbi *ssbi = to_msm_ssbi(dev); + struct ssbi *ssbi = to_ssbi(dev); unsigned long flags; int ret; @@ -261,17 +261,17 @@ int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len) return ret; } -EXPORT_SYMBOL_GPL(msm_ssbi_write); +EXPORT_SYMBOL_GPL(ssbi_write); -static int msm_ssbi_probe(struct platform_device *pdev) +static int ssbi_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct resource *mem_res; - struct msm_ssbi *ssbi; + struct ssbi *ssbi; int ret = 0; const char *type; - ssbi = kzalloc(sizeof(struct msm_ssbi), GFP_KERNEL); + ssbi = kzalloc(sizeof(struct ssbi), GFP_KERNEL); if (!ssbi) { pr_err("can not allocate ssbi_data\n"); return -ENOMEM; @@ -312,11 +312,11 @@ static int msm_ssbi_probe(struct platform_device *pdev) } if (ssbi->controller_type == MSM_SBI_CTRL_PMIC_ARBITER) { - ssbi->read = msm_ssbi_pa_read_bytes; - ssbi->write = msm_ssbi_pa_write_bytes; + ssbi->read = ssbi_pa_read_bytes; + ssbi->write = ssbi_pa_write_bytes; } else { - ssbi->read = msm_ssbi_read_bytes; - ssbi->write = msm_ssbi_write_bytes; + ssbi->read = ssbi_read_bytes; + ssbi->write = ssbi_write_bytes; } spin_lock_init(&ssbi->lock); @@ -336,9 +336,9 @@ err_get_mem_res: return ret; } -static int msm_ssbi_remove(struct platform_device *pdev) +static int ssbi_remove(struct platform_device *pdev) { - struct msm_ssbi *ssbi = platform_get_drvdata(pdev); + struct ssbi *ssbi = platform_get_drvdata(pdev); platform_set_drvdata(pdev, NULL); iounmap(ssbi->base); @@ -351,29 +351,29 @@ static struct of_device_id ssbi_match_table[] = { {} }; -static struct platform_driver msm_ssbi_driver = { - .probe = msm_ssbi_probe, - .remove = msm_ssbi_remove, +static struct platform_driver ssbi_driver = { + .probe = ssbi_probe, + .remove = ssbi_remove, .driver = { - .name = "msm_ssbi", + .name = "ssbi", .owner = THIS_MODULE, .of_match_table = ssbi_match_table, }, }; -static int __init msm_ssbi_init(void) +static int __init ssbi_init(void) { - return platform_driver_register(&msm_ssbi_driver); + return platform_driver_register(&ssbi_driver); } -module_init(msm_ssbi_init); +module_init(ssbi_init); -static void __exit msm_ssbi_exit(void) +static void __exit ssbi_exit(void) { - platform_driver_unregister(&msm_ssbi_driver); + platform_driver_unregister(&ssbi_driver); } -module_exit(msm_ssbi_exit) +module_exit(ssbi_exit) MODULE_LICENSE("GPL v2"); MODULE_VERSION("1.0"); -MODULE_ALIAS("platform:msm_ssbi"); +MODULE_ALIAS("platform:ssbi"); MODULE_AUTHOR("Dima Zavin "); diff --git a/include/linux/msm_ssbi.h b/include/linux/msm_ssbi.h deleted file mode 100644 index 0fe245bb2940..000000000000 --- a/include/linux/msm_ssbi.h +++ /dev/null @@ -1,38 +0,0 @@ -/* Copyright (C) 2010 Google, Inc. - * Copyright (c) 2011, Code Aurora Forum. All rights reserved. - * Author: Dima Zavin - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#ifndef _LINUX_MSM_SSBI_H -#define _LINUX_MSM_SSBI_H - -#include - -struct msm_ssbi_slave_info { - const char *name; - void *platform_data; -}; - -enum msm_ssbi_controller_type { - MSM_SBI_CTRL_SSBI = 0, - MSM_SBI_CTRL_SSBI2, - MSM_SBI_CTRL_PMIC_ARBITER, -}; - -struct msm_ssbi_platform_data { - struct msm_ssbi_slave_info slave; - enum msm_ssbi_controller_type controller_type; -}; - -int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len); -int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len); -#endif diff --git a/include/linux/ssbi.h b/include/linux/ssbi.h new file mode 100644 index 000000000000..44ef5da21470 --- /dev/null +++ b/include/linux/ssbi.h @@ -0,0 +1,38 @@ +/* Copyright (C) 2010 Google, Inc. + * Copyright (c) 2011, Code Aurora Forum. All rights reserved. + * Author: Dima Zavin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _LINUX_SSBI_H +#define _LINUX_SSBI_H + +#include + +struct ssbi_slave_info { + const char *name; + void *platform_data; +}; + +enum ssbi_controller_type { + MSM_SBI_CTRL_SSBI = 0, + MSM_SBI_CTRL_SSBI2, + MSM_SBI_CTRL_PMIC_ARBITER, +}; + +struct ssbi_platform_data { + struct ssbi_slave_info slave; + enum ssbi_controller_type controller_type; +}; + +int ssbi_write(struct device *dev, u16 addr, u8 *buf, int len); +int ssbi_read(struct device *dev, u16 addr, u8 *buf, int len); +#endif -- cgit v1.2.3 From 5bcdf0ce2bf31b09b8707f972c193c6118385526 Mon Sep 17 00:00:00 2001 From: Fabio Porcedda Date: Fri, 15 Mar 2013 11:49:27 +0100 Subject: parport: amiga: use module_platform_driver_probe() Use module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Fabio Porcedda Cc: Matt Porter Cc: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman --- drivers/parport/parport_amiga.c | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-) (limited to 'drivers') diff --git a/drivers/parport/parport_amiga.c b/drivers/parport/parport_amiga.c index ee78e0ee6e05..09503b8d12e6 100644 --- a/drivers/parport/parport_amiga.c +++ b/drivers/parport/parport_amiga.c @@ -244,20 +244,7 @@ static struct platform_driver amiga_parallel_driver = { }, }; -static int __init amiga_parallel_init(void) -{ - return platform_driver_probe(&amiga_parallel_driver, - amiga_parallel_probe); -} - -module_init(amiga_parallel_init); - -static void __exit amiga_parallel_exit(void) -{ - platform_driver_unregister(&amiga_parallel_driver); -} - -module_exit(amiga_parallel_exit); +module_platform_driver_probe(amiga_parallel_driver, amiga_parallel_probe); MODULE_AUTHOR("Joerg Dorchain "); MODULE_DESCRIPTION("Parport Driver for Amiga builtin Port"); -- cgit v1.2.3 From 2451a84839187cd9d150ff1bfac4f5febbcce7a6 Mon Sep 17 00:00:00 2001 From: Silviu-Mihai Popescu Date: Mon, 11 Mar 2013 18:39:22 +0200 Subject: parport: use kmemdup instead of kmalloc + memcpy This replaces calls to kmalloc followed by memcpy with a single call to kmemdup. This was found via make coccicheck. Signed-off-by: Silviu-Mihai Popescu Signed-off-by: Greg Kroah-Hartman --- drivers/parport/parport_gsc.c | 4 ++-- drivers/parport/parport_sunbpp.c | 5 ++--- drivers/parport/procfs.c | 6 ++---- 3 files changed, 6 insertions(+), 9 deletions(-) (limited to 'drivers') diff --git a/drivers/parport/parport_gsc.c b/drivers/parport/parport_gsc.c index 050773c36823..a5251cb5fb0c 100644 --- a/drivers/parport/parport_gsc.c +++ b/drivers/parport/parport_gsc.c @@ -246,14 +246,14 @@ struct parport *parport_gsc_probe_port(unsigned long base, printk (KERN_DEBUG "parport (0x%lx): no memory!\n", base); return NULL; } - ops = kmalloc (sizeof (struct parport_operations), GFP_KERNEL); + ops = kmemdup(&parport_gsc_ops, sizeof(struct parport_operations), + GFP_KERNEL); if (!ops) { printk (KERN_DEBUG "parport (0x%lx): no memory for ops!\n", base); kfree (priv); return NULL; } - memcpy (ops, &parport_gsc_ops, sizeof (struct parport_operations)); priv->ctr = 0xc; priv->ctr_writable = 0xff; priv->dma_buf = 0; diff --git a/drivers/parport/parport_sunbpp.c b/drivers/parport/parport_sunbpp.c index 5c4b6a1db6ca..dffd6d0bd15b 100644 --- a/drivers/parport/parport_sunbpp.c +++ b/drivers/parport/parport_sunbpp.c @@ -284,12 +284,11 @@ static int bpp_probe(struct platform_device *op) size = resource_size(&op->resource[0]); dma = PARPORT_DMA_NONE; - ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL); + ops = kmemdup(&parport_sunbpp_ops, sizeof(struct parport_operations), + GFP_KERNEL); if (!ops) goto out_unmap; - memcpy (ops, &parport_sunbpp_ops, sizeof(struct parport_operations)); - dprintk(("register_port\n")); if (!(p = parport_register_port((unsigned long)base, irq, dma, ops))) goto out_free_ops; diff --git a/drivers/parport/procfs.c b/drivers/parport/procfs.c index 3f56bc086cb5..92ed045a5f93 100644 --- a/drivers/parport/procfs.c +++ b/drivers/parport/procfs.c @@ -476,10 +476,9 @@ int parport_proc_register(struct parport *port) struct parport_sysctl_table *t; int i; - t = kmalloc(sizeof(*t), GFP_KERNEL); + t = kmemdup(&parport_sysctl_template, sizeof(*t), GFP_KERNEL); if (t == NULL) return -ENOMEM; - memcpy(t, &parport_sysctl_template, sizeof(*t)); t->device_dir[0].extra1 = port; @@ -523,10 +522,9 @@ int parport_device_proc_register(struct pardevice *device) struct parport_device_sysctl_table *t; struct parport * port = device->port; - t = kmalloc(sizeof(*t), GFP_KERNEL); + t = kmemdup(&parport_device_sysctl_template, sizeof(*t), GFP_KERNEL); if (t == NULL) return -ENOMEM; - memcpy(t, &parport_device_sysctl_template, sizeof(*t)); t->dev_dir[0].child = t->parport_dir; t->parport_dir[0].child = t->port_dir; -- cgit v1.2.3 From 275b5d2061c20749582060be68b6ec4692736d28 Mon Sep 17 00:00:00 2001 From: Alexandru Gheorghiu Date: Sat, 16 Mar 2013 16:19:51 +0200 Subject: drivers: char: Use PTR_RET function Used PTR_RET function instead of IS_ERR and PTR_ERR. Patch found using coccinelle. Signed-off-by: Alexandru Gheorghiu Signed-off-by: Greg Kroah-Hartman --- drivers/char/tile-srom.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/char/tile-srom.c b/drivers/char/tile-srom.c index 3b22a606f79d..2e2036e940fc 100644 --- a/drivers/char/tile-srom.c +++ b/drivers/char/tile-srom.c @@ -371,7 +371,7 @@ static int srom_setup_minor(struct srom_dev *srom, int index) dev = device_create(srom_class, &platform_bus, MKDEV(srom_major, index), srom, "%d", index); - return IS_ERR(dev) ? PTR_ERR(dev) : 0; + return PTR_RET(dev); } /** srom_init() - Initialize the driver's module. */ -- cgit v1.2.3 From 0a5f19cf303ea9cc9bf89a42960a69db4ea3c35b Mon Sep 17 00:00:00 2001 From: Lokesh Vutla Date: Sat, 16 Mar 2013 11:46:41 +0530 Subject: memory: emif: Fix the lpmode timeout calculation The driver tries to round up the specified timeout cycles to the next power of 2 value. This should be done defore updating timeout variable. Correcting this here. Reported-by: Nishanth Menon Signed-off-by: Lokesh Vutla Acked-by: Santosh Shilimkar Signed-off-by: Greg Kroah-Hartman --- drivers/memory/emif.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index ecbc1a996eb6..897c39a8db86 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -728,13 +728,17 @@ static u32 get_pwr_mgmt_ctrl(u32 freq, struct emif_data *emif, u32 ip_rev) /* Timeout based on DDR frequency */ timeout = freq >= freq_threshold ? timeout_perf : timeout_pwr; - /* The value to be set in register is "log2(timeout) - 3" */ + /* + * The value to be set in register is "log2(timeout) - 3" + * if timeout < 16 load 0 in register + * if timeout is not a power of 2, round to next highest power of 2 + */ if (timeout < 16) { timeout = 0; } else { - timeout = __fls(timeout) - 3; if (timeout & (timeout - 1)) - timeout++; + timeout <<= 1; + timeout = __fls(timeout) - 3; } switch (lpmode) { -- cgit v1.2.3 From 9ea03dec380208bfee015b25f253c2f58aba0071 Mon Sep 17 00:00:00 2001 From: Ambresh K Date: Sat, 16 Mar 2013 11:46:42 +0530 Subject: memory: emif: setup LP settings on freq update Program the power management shadow register on freq update Else the concept of threshold frequencies dont really matter as the system always uses the performance mode timing for LP which is programmed in at init time. Signed-off-by: Nishanth Menon Signed-off-by: Ambresh K Signed-off-by: Lokesh Vutla Acked-by: Santosh Shilimkar Signed-off-by: Greg Kroah-Hartman --- drivers/memory/emif.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers') diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index 897c39a8db86..bda11ebb25cd 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -819,6 +819,8 @@ static void setup_registers(struct emif_data *emif, struct emif_regs *regs) writel(regs->sdram_tim2_shdw, base + EMIF_SDRAM_TIMING_2_SHDW); writel(regs->phy_ctrl_1_shdw, base + EMIF_DDR_PHY_CTRL_1_SHDW); + writel(regs->pwr_mgmt_ctrl_shdw, + base + EMIF_POWER_MANAGEMENT_CTRL_SHDW); /* Settings specific for EMIF4D5 */ if (emif->plat_data->ip_rev != EMIF_4D5) -- cgit v1.2.3 From 25aaacd2834233bbfa2b7ec697bfce42707e35b7 Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Sat, 16 Mar 2013 11:46:43 +0530 Subject: memory: emif: handle overflow for timing for LP mode In case the custom timings provide values which overflow the maximum possible field value, warn and use maximum permissible value. Signed-off-by: Nishanth Menon Signed-off-by: Lokesh Vutla Acked-by: Santosh Shilimkar Signed-off-by: Greg Kroah-Hartman --- drivers/memory/emif.c | 36 ++++++++++++++++++++++++++++-------- 1 file changed, 28 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index bda11ebb25cd..249222905c94 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -715,6 +715,8 @@ static u32 get_pwr_mgmt_ctrl(u32 freq, struct emif_data *emif, u32 ip_rev) u32 timeout_perf = EMIF_LP_MODE_TIMEOUT_PERFORMANCE; u32 timeout_pwr = EMIF_LP_MODE_TIMEOUT_POWER; u32 freq_threshold = EMIF_LP_MODE_FREQ_THRESHOLD; + u32 mask; + u8 shift; struct emif_custom_configs *cust_cfgs = emif->plat_data->custom_configs; @@ -743,27 +745,45 @@ static u32 get_pwr_mgmt_ctrl(u32 freq, struct emif_data *emif, u32 ip_rev) switch (lpmode) { case EMIF_LP_MODE_CLOCK_STOP: - pwr_mgmt_ctrl = (timeout << CS_TIM_SHIFT) | - SR_TIM_MASK | PD_TIM_MASK; + shift = CS_TIM_SHIFT; + mask = CS_TIM_MASK; break; case EMIF_LP_MODE_SELF_REFRESH: /* Workaround for errata i735 */ if (timeout < 6) timeout = 6; - pwr_mgmt_ctrl = (timeout << SR_TIM_SHIFT) | - CS_TIM_MASK | PD_TIM_MASK; + shift = SR_TIM_SHIFT; + mask = SR_TIM_MASK; break; case EMIF_LP_MODE_PWR_DN: - pwr_mgmt_ctrl = (timeout << PD_TIM_SHIFT) | - CS_TIM_MASK | SR_TIM_MASK; + shift = PD_TIM_SHIFT; + mask = PD_TIM_MASK; break; case EMIF_LP_MODE_DISABLE: default: - pwr_mgmt_ctrl = CS_TIM_MASK | - PD_TIM_MASK | SR_TIM_MASK; + mask = 0; + shift = 0; + break; + } + /* Round to maximum in case of overflow, BUT warn! */ + if (lpmode != EMIF_LP_MODE_DISABLE && timeout > mask >> shift) { + pr_err("TIMEOUT Overflow - lpmode=%d perf=%d pwr=%d freq=%d\n", + lpmode, + timeout_perf, + timeout_pwr, + freq_threshold); + WARN(1, "timeout=0x%02x greater than 0x%02x. Using max\n", + timeout, mask >> shift); + timeout = mask >> shift; } + /* Setup required timing */ + pwr_mgmt_ctrl = (timeout << shift) & mask; + /* setup a default mask for rest of the modes */ + pwr_mgmt_ctrl |= (SR_TIM_MASK | CS_TIM_MASK | PD_TIM_MASK) & + ~mask; + /* No CS_TIM in EMIF_4D5 */ if (ip_rev == EMIF_4D5) pwr_mgmt_ctrl &= ~CS_TIM_MASK; -- cgit v1.2.3 From f91a595d0b813c3a2f3b848c165e865ca4c5b8cc Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Sat, 16 Mar 2013 11:46:44 +0530 Subject: memory: emif: Handle devices which are not rated for >85C As per JESD209-2E specification for LPDDR2, http://www.jedec.org/standards-documents/results/jesd209-2E Table 73, LPDDR2 memories come in two flavors - Standard and Extended. The Standard types can operate from -25C to +85C However, beyond that and upto +105C can only be supported by Extended types. Unfortunately, it seems there is no info in MR0(device info) or MR[1,2](device feature) for run time detection of this capability as far as seen on the spec. Hence, we provide a custom_config flag to be populated by platforms which have these "extended" type memories. For the "Standard" memories, we need to consider MR4 notifications of temperature triggers >85C as equivalent to thermal shutdown events (equivalent to Spec specified thermal shutdown events for "extended" parts). Reported-by: Richard Woodruff Signed-off-by: Nishanth Menon Signed-off-by: Lokesh Vutla Acked-by: Santosh Shilimkar Signed-off-by: Greg Kroah-Hartman --- drivers/memory/emif.c | 27 +++++++++++++++++++++++++++ include/linux/platform_data/emif_plat.h | 1 + 2 files changed, 28 insertions(+) (limited to 'drivers') diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index 249222905c94..96add5b9ce5d 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -918,6 +918,7 @@ static irqreturn_t handle_temp_alert(void __iomem *base, struct emif_data *emif) { u32 old_temp_level; irqreturn_t ret = IRQ_HANDLED; + struct emif_custom_configs *custom_configs; spin_lock_irqsave(&emif_lock, irq_state); old_temp_level = emif->temperature_level; @@ -930,6 +931,29 @@ static irqreturn_t handle_temp_alert(void __iomem *base, struct emif_data *emif) goto out; } + custom_configs = emif->plat_data->custom_configs; + + /* + * IF we detect higher than "nominal rating" from DDR sensor + * on an unsupported DDR part, shutdown system + */ + if (custom_configs && !(custom_configs->mask & + EMIF_CUSTOM_CONFIG_EXTENDED_TEMP_PART)) { + if (emif->temperature_level >= SDRAM_TEMP_HIGH_DERATE_REFRESH) { + dev_err(emif->dev, + "%s:NOT Extended temperature capable memory." + "Converting MR4=0x%02x as shutdown event\n", + __func__, emif->temperature_level); + /* + * Temperature far too high - do kernel_power_off() + * from thread context + */ + emif->temperature_level = SDRAM_TEMP_VERY_HIGH_SHUTDOWN; + ret = IRQ_WAKE_THREAD; + goto out; + } + } + if (emif->temperature_level < old_temp_level || emif->temperature_level == SDRAM_TEMP_VERY_HIGH_SHUTDOWN) { /* @@ -1228,6 +1252,9 @@ static void __init_or_module of_get_custom_configs(struct device_node *np_emif, cust_cfgs->temp_alert_poll_interval_ms = *poll_intvl; } + if (of_find_property(np_emif, "extended-temp-part", &len)) + cust_cfgs->mask |= EMIF_CUSTOM_CONFIG_EXTENDED_TEMP_PART; + if (!is_custom_config_valid(cust_cfgs, emif->dev)) { devm_kfree(emif->dev, cust_cfgs); return; diff --git a/include/linux/platform_data/emif_plat.h b/include/linux/platform_data/emif_plat.h index 03378ca84061..5c19a2a647c4 100644 --- a/include/linux/platform_data/emif_plat.h +++ b/include/linux/platform_data/emif_plat.h @@ -40,6 +40,7 @@ /* Custom config requests */ #define EMIF_CUSTOM_CONFIG_LPMODE 0x00000001 #define EMIF_CUSTOM_CONFIG_TEMP_ALERT_POLL_INTERVAL 0x00000002 +#define EMIF_CUSTOM_CONFIG_EXTENDED_TEMP_PART 0x00000004 #ifndef __ASSEMBLY__ /** -- cgit v1.2.3 From 2553e32ae200210801dd3e3f58dd23169356c9d6 Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Sat, 16 Mar 2013 11:46:45 +0530 Subject: memory: emif: use restart if power_off not present when out of spec Some machine or kernel variants might have missed implementation of power off handlers. We DONOT want to let the system be in "out of spec" state in this condition. So, WARN and attempt a machine restart in the hopes of clearing the out-of-spec temperature condition. NOTE: This is not the safest option, but safer than leaving the system in unstable conditions. Signed-off-by: Nishanth Menon Signed-off-by: Lokesh Vutla Acked-by: Santosh Shilimkar Signed-off-by: Greg Kroah-Hartman --- drivers/memory/emif.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index 96add5b9ce5d..b2bb27261c73 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include "emif.h" #include "of_memory.h" @@ -1015,7 +1016,14 @@ static irqreturn_t emif_threaded_isr(int irq, void *dev_id) if (emif->temperature_level == SDRAM_TEMP_VERY_HIGH_SHUTDOWN) { dev_emerg(emif->dev, "SDRAM temperature exceeds operating limit.. Needs shut down!!!\n"); - kernel_power_off(); + + /* If we have Power OFF ability, use it, else try restarting */ + if (pm_power_off) { + kernel_power_off(); + } else { + WARN(1, "FIXME: NO pm_power_off!!! trying restart\n"); + kernel_restart("SDRAM Over-temp Emergency restart"); + } return IRQ_HANDLED; } -- cgit v1.2.3 From 36caf3e525b24556f649aecd097cad73bde6f035 Mon Sep 17 00:00:00 2001 From: Oleksandr Dmytryshyn Date: Sat, 16 Mar 2013 11:46:46 +0530 Subject: memory: emif: Fix the incorrect 'size' parameter in memcpy The issue was that only the first timings table was added to the emif platform data at the emif driver registration. All other timings tables was filled with zeros. Now all emif timings table are added to the platform data. Signed-off-by: Oleksandr Dmytryshyn Signed-off-by: Lokesh Vutla Acked-by: Santosh Shilimkar Signed-off-by: Greg Kroah-Hartman --- drivers/memory/emif.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index b2bb27261c73..9335339ebfdf 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -1468,7 +1468,7 @@ static struct emif_data *__init_or_module get_device_details( if (pd->timings) { temp = devm_kzalloc(dev, size, GFP_KERNEL); if (temp) { - memcpy(temp, pd->timings, sizeof(*pd->timings)); + memcpy(temp, pd->timings, size); pd->timings = temp; } else { dev_warn(dev, "%s:%d: allocation error\n", __func__, -- cgit v1.2.3 From f02503b2ff73d3b09ca27335304611a206d2b54a Mon Sep 17 00:00:00 2001 From: Grygorii Strashko Date: Sat, 16 Mar 2013 11:46:47 +0530 Subject: memory: emif: errata i743: Prohibit usage of Power-Down mode ERRATA DESCRIPTION : The EMIF supports power-down state for low power. The EMIF automatically puts the SDRAM into power-down after the memory is not accessed for a defined number of cycles and the EMIF_PWR_MGMT_CTRL[10:8] REG_LP_MODE bit field is set to 0x4. As the EMIF supports automatic output impedance calibration, a ZQ calibration long command is issued every time it exits active power-down and precharge power-down modes. The EMIF waits and blocks any other command during this calibration. The EMIF does not allow selective disabling of ZQ calibration upon exit of power-down mode. Due to very short periods of power-down cycles, ZQ calibration overhead creates bandwidth issues and increases overall system power consumption. On the other hand, issuing ZQ calibration long commands when exiting self-refresh is still required. WORKAROUND : Because there is no power consumption benefit of the power-down due to the calibration and there is a performance risk, the guideline is to not allow power-down state and, therefore, to not have set the EMIF_PWR_MGMT_CTRL[10:8] REG_LP_MODE bit field to 0x4. This is applicable only for EMIF4D IP used in OMAP4 Soc's. Signed-off-by: Grygorii Strashko Signed-off-by: Vitaly Chernooky Signed-off-by: Oleksandr Dmytryshyn Signed-off-by: Lokesh Vutla Acked-by: Santosh Shilimkar Signed-off-by: Greg Kroah-Hartman --- drivers/memory/emif.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) (limited to 'drivers') diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index 9335339ebfdf..bd223c7c3e72 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -257,6 +257,41 @@ static void set_lpmode(struct emif_data *emif, u8 lpmode) u32 temp; void __iomem *base = emif->base; + /* + * Workaround for errata i743 - LPDDR2 Power-Down State is Not + * Efficient + * + * i743 DESCRIPTION: + * The EMIF supports power-down state for low power. The EMIF + * automatically puts the SDRAM into power-down after the memory is + * not accessed for a defined number of cycles and the + * EMIF_PWR_MGMT_CTRL[10:8] REG_LP_MODE bit field is set to 0x4. + * As the EMIF supports automatic output impedance calibration, a ZQ + * calibration long command is issued every time it exits active + * power-down and precharge power-down modes. The EMIF waits and + * blocks any other command during this calibration. + * The EMIF does not allow selective disabling of ZQ calibration upon + * exit of power-down mode. Due to very short periods of power-down + * cycles, ZQ calibration overhead creates bandwidth issues and + * increases overall system power consumption. On the other hand, + * issuing ZQ calibration long commands when exiting self-refresh is + * still required. + * + * WORKAROUND + * Because there is no power consumption benefit of the power-down due + * to the calibration and there is a performance risk, the guideline + * is to not allow power-down state and, therefore, to not have set + * the EMIF_PWR_MGMT_CTRL[10:8] REG_LP_MODE bit field to 0x4. + */ + if ((emif->plat_data->ip_rev == EMIF_4D) && + (EMIF_LP_MODE_PWR_DN == lpmode)) { + WARN_ONCE(1, + "REG_LP_MODE = LP_MODE_PWR_DN(4) is prohibited by" + "erratum i743 switch to LP_MODE_SELF_REFRESH(2)\n"); + /* rollback LP_MODE to Self-refresh mode */ + lpmode = EMIF_LP_MODE_SELF_REFRESH; + } + temp = readl(base + EMIF_POWER_MANAGEMENT_CONTROL); temp &= ~LP_MODE_MASK; temp |= (lpmode << LP_MODE_SHIFT); -- cgit v1.2.3 From f57f27bc6ed7106276004dd224aaeeb160a5b4b8 Mon Sep 17 00:00:00 2001 From: Lokesh Vutla Date: Sat, 16 Mar 2013 11:46:48 +0530 Subject: memory: emif: Load the correct custom config values from dt of_get_property returns value in Big Endian format. Before using this value it should be converted to little endian using be32_to_cpup(). Custom configs of emif are read from dt using of_get_property, but these are not converted to litte endian format. Correcting the same here. Signed-off-by: Lokesh Vutla Acked-by: Santosh Shilimkar Signed-off-by: Greg Kroah-Hartman --- drivers/memory/emif.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c index bd223c7c3e72..cadf1cc19aaf 100644 --- a/drivers/memory/emif.c +++ b/drivers/memory/emif.c @@ -1263,7 +1263,7 @@ static void __init_or_module of_get_custom_configs(struct device_node *np_emif, { struct emif_custom_configs *cust_cfgs = NULL; int len; - const int *lpmode, *poll_intvl; + const __be32 *lpmode, *poll_intvl; lpmode = of_get_property(np_emif, "low-power-mode", &len); poll_intvl = of_get_property(np_emif, "temp-alert-poll-interval", &len); @@ -1277,7 +1277,7 @@ static void __init_or_module of_get_custom_configs(struct device_node *np_emif, if (lpmode) { cust_cfgs->mask |= EMIF_CUSTOM_CONFIG_LPMODE; - cust_cfgs->lpmode = *lpmode; + cust_cfgs->lpmode = be32_to_cpup(lpmode); of_property_read_u32(np_emif, "low-power-mode-timeout-performance", &cust_cfgs->lpmode_timeout_performance); @@ -1292,7 +1292,8 @@ static void __init_or_module of_get_custom_configs(struct device_node *np_emif, if (poll_intvl) { cust_cfgs->mask |= EMIF_CUSTOM_CONFIG_TEMP_ALERT_POLL_INTERVAL; - cust_cfgs->temp_alert_poll_interval_ms = *poll_intvl; + cust_cfgs->temp_alert_poll_interval_ms = + be32_to_cpup(poll_intvl); } if (of_find_property(np_emif, "extended-temp-part", &len)) -- cgit v1.2.3 From 4c6e22b8a93ef038b70661e590de250a09417af7 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Sun, 17 Mar 2013 11:41:20 +0200 Subject: mei: add mei_irq_compl_handler function similar to read/write add also irq completion handler that is called for the irq thread rename missnamed mei_irq_complete_handler to mei_cl_complete_handler as it operates on a single client Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hw-me.c | 18 +----------------- drivers/misc/mei/interrupt.c | 39 ++++++++++++++++++++++++++++++++------- drivers/misc/mei/mei_dev.h | 3 +-- 3 files changed, 34 insertions(+), 26 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index df9b43d81eea..11a2a6538c0b 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -456,8 +456,6 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) { struct mei_device *dev = (struct mei_device *) dev_id; struct mei_cl_cb complete_list; - struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; - struct mei_cl *cl; s32 slots; int rets; bool bus_message_received; @@ -527,23 +525,9 @@ end: wake_up_interruptible(&dev->wait_recvd_msg); bus_message_received = false; } - if (list_empty(&complete_list.list)) - return IRQ_HANDLED; + mei_irq_compl_handler(dev, &complete_list); - list_for_each_entry_safe(cb_pos, cb_next, &complete_list.list, list) { - cl = cb_pos->cl; - list_del(&cb_pos->list); - if (cl) { - if (cl != &dev->iamthif_cl) { - dev_dbg(&dev->pdev->dev, "completing call back.\n"); - mei_irq_complete_handler(cl, cb_pos); - cb_pos = NULL; - } else if (cl == &dev->iamthif_cl) { - mei_amthif_complete(dev, cb_pos); - } - } - } return IRQ_HANDLED; } static const struct mei_hw_ops mei_me_hw_ops = { diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 14c70b8815d8..73fbce3e7746 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -30,21 +30,21 @@ /** - * mei_complete_handler - processes completed operation. + * mei_cl_complete_handler - processes completed operation for a client * * @cl: private data of the file object. - * @cb_pos: callback block. + * @cb: callback block. */ -void mei_irq_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb_pos) +static void mei_cl_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb) { - if (cb_pos->fop_type == MEI_FOP_WRITE) { - mei_io_cb_free(cb_pos); - cb_pos = NULL; + if (cb->fop_type == MEI_FOP_WRITE) { + mei_io_cb_free(cb); + cb = NULL; cl->writing_state = MEI_WRITE_COMPLETE; if (waitqueue_active(&cl->tx_wait)) wake_up_interruptible(&cl->tx_wait); - } else if (cb_pos->fop_type == MEI_FOP_READ && + } else if (cb->fop_type == MEI_FOP_READ && MEI_READING == cl->reading_state) { cl->reading_state = MEI_READ_COMPLETE; if (waitqueue_active(&cl->rx_wait)) @@ -53,6 +53,31 @@ void mei_irq_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb_pos) } } +/** + * mei_irq_compl_handler - dispatch complete handelers + * for the completed callbacks + * + * @dev - mei device + * @compl_list - list of completed cbs + */ +void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *compl_list) +{ + struct mei_cl_cb *cb, *next; + struct mei_cl *cl; + + list_for_each_entry_safe(cb, next, &compl_list->list, list) { + cl = cb->cl; + list_del(&cb->list); + if (!cl) + continue; + + dev_dbg(&dev->pdev->dev, "completing call back.\n"); + if (cl == &dev->iamthif_cl) + mei_amthif_complete(dev, cb); + else + mei_cl_complete_handler(cl, cb); + } +} /** * _mei_irq_thread_state_ok - checks if mei header matches file private data * diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 5c30857e91d5..1a4b50ca4b3b 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -405,8 +405,7 @@ int mei_irq_read_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list, s32 *slots); int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); - -void mei_irq_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb_pos); +void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); /* * AMTHIF - AMT Host Interface Functions -- cgit v1.2.3 From 54f69b92f037f4ff5779e5645ab714dee5b59095 Mon Sep 17 00:00:00 2001 From: Jiri Kosina Date: Thu, 21 Mar 2013 00:21:21 +0100 Subject: dummy-irq: introduce a dummy IRQ handler driver This module accepts a single 'irq' parameter, which it should register for. Its sole purpose is to help with debugging of IRQ sharing problems, by force-enabling IRQ that would otherwise be disabled. Suggested-by: Alan Stern Signed-off-by: Jiri Kosina Acked-by: Daniel Vetter Signed-off-by: Greg Kroah-Hartman --- drivers/misc/Kconfig | 8 +++++++ drivers/misc/Makefile | 1 + drivers/misc/dummy-irq.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 68 insertions(+) create mode 100644 drivers/misc/dummy-irq.c (limited to 'drivers') diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index e83fdfe0c8ca..69bb79d6dd54 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -93,6 +93,14 @@ config ATMEL_TCB_CLKSRC_BLOCK TC can be used for other purposes, such as PWM generation and interval timing. +config DUMMY_IRQ + tristate "Dummy IRQ handler" + default n + ---help--- + This module accepts a single 'irq' parameter, which it should register for. + The sole purpose of this module is to help with debugging of systems on + which spurious IRQs would happen on disabled IRQ vector. + config IBM_ASM tristate "Device driver for IBM RSA service processor" depends on X86 && PCI && INPUT diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 3e2faa0939b2..865cbc6a7ae1 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o obj-$(CONFIG_BMP085) += bmp085.o obj-$(CONFIG_BMP085_I2C) += bmp085-i2c.o obj-$(CONFIG_BMP085_SPI) += bmp085-spi.o +obj-$(CONFIG_DUMMY_IRQ) += dummy-irq.o obj-$(CONFIG_ICS932S401) += ics932s401.o obj-$(CONFIG_LKDTM) += lkdtm.o obj-$(CONFIG_TIFM_CORE) += tifm_core.o diff --git a/drivers/misc/dummy-irq.c b/drivers/misc/dummy-irq.c new file mode 100644 index 000000000000..7014167e2c61 --- /dev/null +++ b/drivers/misc/dummy-irq.c @@ -0,0 +1,59 @@ +/* + * Dummy IRQ handler driver. + * + * This module only registers itself as a handler that is specified to it + * by the 'irq' parameter. + * + * The sole purpose of this module is to help with debugging of systems on + * which spurious IRQs would happen on disabled IRQ vector. + * + * Copyright (C) 2013 Jiri Kosina + */ + +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ +#include +#include +#include + +static int irq; + +static irqreturn_t dummy_interrupt(int irq, void *dev_id) +{ + static int count = 0; + + if (count == 0) { + printk(KERN_INFO "dummy-irq: interrupt occured on IRQ %d\n", + irq); + count++; + } + + return IRQ_NONE; +} + +static int __init dummy_irq_init(void) +{ + if (request_irq(irq, &dummy_interrupt, IRQF_SHARED, "dummy_irq", &irq)) { + printk(KERN_ERR "dummy-irq: cannot register IRQ %d\n", irq); + return -EIO; + } + printk(KERN_INFO "dummy-irq: registered for IRQ %d\n", irq); + return 0; +} + +static void __exit dummy_irq_exit(void) +{ + printk(KERN_INFO "dummy-irq unloaded\n"); + free_irq(irq, &irq); +} + +module_init(dummy_irq_init); +module_exit(dummy_irq_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jiri Kosina"); +module_param(irq, uint, 0444); +MODULE_PARM_DESC(irq, "The IRQ to register for"); -- cgit v1.2.3 From a6025a2a861845447adeb7a11c3043039959d3a1 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Wed, 20 Mar 2013 23:25:59 +0800 Subject: Drivers: hv: balloon: make local functions static local functions that could be static. Signed-off-by: Wei Yongjun Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_balloon.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 2cf7d4e964bd..d5225261ee54 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -537,7 +537,7 @@ static struct hv_dynmem_device dm_device; #ifdef CONFIG_MEMORY_HOTPLUG -void hv_bring_pgs_online(unsigned long start_pfn, unsigned long size) +static void hv_bring_pgs_online(unsigned long start_pfn, unsigned long size) { int i; @@ -876,7 +876,7 @@ static void process_info(struct hv_dynmem_device *dm, struct dm_info_msg *msg) } } -unsigned long compute_balloon_floor(void) +static unsigned long compute_balloon_floor(void) { unsigned long min_pages; #define MB2PAGES(mb) ((mb) << (20 - PAGE_SHIFT)) -- cgit v1.2.3 From 03409071ce2751ca124f35edebe4bcad52de22c2 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 12 Feb 2013 13:00:31 +0000 Subject: extcon: arizona: Factor out magic application We have a very similar sequence doing magic writes in several places (one of which missed an update to interlock with the CODEC driver) so factor it out into a function. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 91 ++++++++++++++++------------------------- 1 file changed, 36 insertions(+), 55 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index dc357a4051f6..896a923546e0 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -100,6 +100,39 @@ static const char *arizona_cable[] = { NULL, }; +static void arizona_extcon_do_magic(struct arizona_extcon_info *info, + unsigned int magic) +{ + struct arizona *arizona = info->arizona; + unsigned int val; + int ret; + + mutex_lock(&arizona->dapm->card->dapm_mutex); + + ret = regmap_read(arizona->regmap, ARIZONA_OUTPUT_ENABLES_1, &val); + if (ret != 0) { + dev_err(arizona->dev, "Failed to read output enables: %d\n", + ret); + val = 0; + } + + if (!(val & (ARIZONA_OUT1L_ENA | ARIZONA_OUT1R_ENA))) { + ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, + magic); + if (ret != 0) + dev_warn(arizona->dev, "Failed to do magic: %d\n", + ret); + + ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000, + magic); + if (ret != 0) + dev_warn(arizona->dev, "Failed to do magic: %d\n", + ret); + } + + mutex_unlock(&arizona->dapm->card->dapm_mutex); +} + static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode) { struct arizona *arizona = info->arizona; @@ -484,7 +517,6 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data) struct arizona *arizona = info->arizona; int id_gpio = arizona->pdata.hpdet_id_gpio; int report = ARIZONA_CABLE_HEADPHONE; - unsigned int val; int ret, reading; mutex_lock(&info->lock); @@ -539,28 +571,7 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data) dev_err(arizona->dev, "Failed to report HP/line: %d\n", ret); - mutex_lock(&arizona->dapm->card->dapm_mutex); - - ret = regmap_read(arizona->regmap, ARIZONA_OUTPUT_ENABLES_1, &val); - if (ret != 0) { - dev_err(arizona->dev, "Failed to read output enables: %d\n", - ret); - val = 0; - } - - if (!(val & (ARIZONA_OUT1L_ENA | ARIZONA_OUT1R_ENA))) { - ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, 0); - if (ret != 0) - dev_warn(arizona->dev, "Failed to undo magic: %d\n", - ret); - - ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000, 0); - if (ret != 0) - dev_warn(arizona->dev, "Failed to undo magic: %d\n", - ret); - } - - mutex_unlock(&arizona->dapm->card->dapm_mutex); + arizona_extcon_do_magic(info, 0); done: if (id_gpio) @@ -606,13 +617,7 @@ static void arizona_identify_headphone(struct arizona_extcon_info *info) if (info->mic) arizona_stop_mic(info); - ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, 0x4000); - if (ret != 0) - dev_warn(arizona->dev, "Failed to do magic: %d\n", ret); - - ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000, 0x4000); - if (ret != 0) - dev_warn(arizona->dev, "Failed to do magic: %d\n", ret); + arizona_extcon_do_magic(info, 0x4000); ret = regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1, @@ -653,7 +658,6 @@ err: static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info) { struct arizona *arizona = info->arizona; - unsigned int val; int ret; dev_dbg(arizona->dev, "Starting identification via HPDET\n"); @@ -665,30 +669,7 @@ static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info) arizona_extcon_pulse_micbias(info); - mutex_lock(&arizona->dapm->card->dapm_mutex); - - ret = regmap_read(arizona->regmap, ARIZONA_OUTPUT_ENABLES_1, &val); - if (ret != 0) { - dev_err(arizona->dev, "Failed to read output enables: %d\n", - ret); - val = 0; - } - - if (!(val & (ARIZONA_OUT1L_ENA | ARIZONA_OUT1R_ENA))) { - ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, - 0x4000); - if (ret != 0) - dev_warn(arizona->dev, "Failed to do magic: %d\n", - ret); - - ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000, - 0x4000); - if (ret != 0) - dev_warn(arizona->dev, "Failed to do magic: %d\n", - ret); - } - - mutex_unlock(&arizona->dapm->card->dapm_mutex); + arizona_extcon_do_magic(info, 0x4000); ret = regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1, -- cgit v1.2.3 From df8c3dbee9e6f19ddb0ae8e05cdf76eb2d3b7f00 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 22 Feb 2013 18:38:03 +0000 Subject: extcon: arizona: Fix interaction between headphone outputs and identification Running HPDET while the headphone outputs are enabled can disrupt the operation of HPDET. In order to avoid this HPDET needs to disable the headphone outputs and ASoC needs to not enable them while HPDET is running. For extcon instead of checking if the headphone output is enabled when doing magic application unconditionally disable the output and restore the state which ASoC wants set when undoing the magic. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 44 ++++++++++++++++++++++++++++------------- 1 file changed, 30 insertions(+), 14 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index 896a923546e0..b28927972128 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -104,29 +104,45 @@ static void arizona_extcon_do_magic(struct arizona_extcon_info *info, unsigned int magic) { struct arizona *arizona = info->arizona; - unsigned int val; int ret; mutex_lock(&arizona->dapm->card->dapm_mutex); - ret = regmap_read(arizona->regmap, ARIZONA_OUTPUT_ENABLES_1, &val); - if (ret != 0) { - dev_err(arizona->dev, "Failed to read output enables: %d\n", - ret); - val = 0; - } + arizona->hpdet_magic = magic; - if (!(val & (ARIZONA_OUT1L_ENA | ARIZONA_OUT1R_ENA))) { - ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, - magic); + /* Keep the HP output stages disabled while doing the magic */ + if (magic) { + ret = regmap_update_bits(arizona->regmap, + ARIZONA_OUTPUT_ENABLES_1, + ARIZONA_OUT1L_ENA | + ARIZONA_OUT1R_ENA, 0); if (ret != 0) - dev_warn(arizona->dev, "Failed to do magic: %d\n", + dev_warn(arizona->dev, + "Failed to disable headphone outputs: %d\n", + ret); + } + + ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, + magic); + if (ret != 0) + dev_warn(arizona->dev, "Failed to do magic: %d\n", ret); - ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000, - magic); + ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000, + magic); + if (ret != 0) + dev_warn(arizona->dev, "Failed to do magic: %d\n", + ret); + + /* Restore the desired state while not doing the magic */ + if (!magic) { + ret = regmap_update_bits(arizona->regmap, + ARIZONA_OUTPUT_ENABLES_1, + ARIZONA_OUT1L_ENA | + ARIZONA_OUT1R_ENA, arizona->hp_ena); if (ret != 0) - dev_warn(arizona->dev, "Failed to do magic: %d\n", + dev_warn(arizona->dev, + "Failed to restore headphone outputs: %d\n", ret); } -- cgit v1.2.3 From 02dbd0ff5448d4da0c6e9d59c897f3e31a16d51a Mon Sep 17 00:00:00 2001 From: David Brown Date: Tue, 26 Mar 2013 11:20:17 -0700 Subject: mfd: pm8921: Disable driver until it gets fixed The pm8921 driver has been broken for a while now, but was prevented from compiling because the SSBI bus driver was missing. Now that SSBI is present, pm8921 causes compile fails. Until the pm8921 driver is fixed, mark it as BROKEN to prevent compiles from failing. Reported-by: Stephen Rothwell Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- drivers/mfd/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 72933c756c8e..ca86581d02ce 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -991,7 +991,7 @@ config MFD_PM8XXX config MFD_PM8921_CORE tristate "Qualcomm PM8921 PMIC chip" - depends on SSBI + depends on SSBI && BROKEN select MFD_CORE select MFD_PM8XXX help -- cgit v1.2.3 From cea6aec451586afef2bace28d08145a869131b5b Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Wed, 27 Mar 2013 13:42:15 +0200 Subject: mei: drop RECOVERING_FROM_RESET device state ECOVERING_FROM_RESET device state is never set we can remove it Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/init.c | 4 ---- drivers/misc/mei/mei_dev.h | 1 - 2 files changed, 5 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 1ab1fb1db07b..09a9980303b4 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -34,7 +34,6 @@ const char *mei_dev_state_str(int state) MEI_DEV_STATE(ENABLED); MEI_DEV_STATE(RESETING); MEI_DEV_STATE(DISABLED); - MEI_DEV_STATE(RECOVERING_FROM_RESET); MEI_DEV_STATE(POWER_DOWN); MEI_DEV_STATE(POWER_UP); default: @@ -139,9 +138,6 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) { bool unexpected; - if (dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) - return; - unexpected = (dev->dev_state != MEI_DEV_INITIALIZING && dev->dev_state != MEI_DEV_DISABLED && dev->dev_state != MEI_DEV_POWER_DOWN && diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index d6fd3d6410d6..091f50af18a4 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -97,7 +97,6 @@ enum mei_dev_state { MEI_DEV_ENABLED, MEI_DEV_RESETING, MEI_DEV_DISABLED, - MEI_DEV_RECOVERING_FROM_RESET, MEI_DEV_POWER_DOWN, MEI_DEV_POWER_UP }; -- cgit v1.2.3 From 2e64712450e30a445b5650d1205e1aaca811f084 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Wed, 27 Mar 2013 16:58:26 +0200 Subject: mei: unregister watchdog from mei_stop function we need to unregister watchdog device both in suspend and remove as the registration is recreated on reset Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/init.c | 3 +++ drivers/misc/mei/pci-me.c | 2 -- 2 files changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 09a9980303b4..aced38c9f6a8 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -211,6 +211,9 @@ void mei_stop(struct mei_device *dev) mutex_unlock(&dev->device_lock); flush_scheduled_work(); + + mei_watchdog_unregister(dev); + } diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index b8b5c9c3ad03..252b1fd315a8 100644 --- a/drivers/misc/mei/pci-me.c +++ b/drivers/misc/mei/pci-me.c @@ -253,8 +253,6 @@ static void mei_remove(struct pci_dev *pdev) mei_pdev = NULL; - mei_watchdog_unregister(dev); - /* disable interrupts */ mei_disable_interrupts(dev); -- cgit v1.2.3 From d0265f1202e82a27a015cb24635d85f3ab9ae4d5 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Wed, 27 Mar 2013 16:58:27 +0200 Subject: mei: ME structures should be initialized in mei_device_init mei_timer and mei_host_client_init belongs to mei framework and are not ME hw specific. AMTHIF and WD are available only for ME but are above the hardware layer so move the initialization back from mei_me_dev_init to mei_device_init. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hw-me.c | 8 -------- drivers/misc/mei/init.c | 9 +++++++++ 2 files changed, 9 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 7c2b14d714b9..12c2fa195e56 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -583,14 +583,6 @@ struct mei_device *mei_me_dev_init(struct pci_dev *pdev) mei_device_init(dev); - INIT_LIST_HEAD(&dev->wd_cl.link); - INIT_LIST_HEAD(&dev->iamthif_cl.link); - mei_io_list_init(&dev->amthif_cmd_list); - mei_io_list_init(&dev->amthif_rd_complete_list); - - INIT_DELAYED_WORK(&dev->timer_work, mei_timer); - INIT_WORK(&dev->init_work, mei_host_client_init); - dev->ops = &mei_me_hw_ops; dev->pdev = pdev; diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index aced38c9f6a8..33f56308ba3c 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -57,6 +57,15 @@ void mei_device_init(struct mei_device *dev) mei_io_list_init(&dev->write_waiting_list); mei_io_list_init(&dev->ctrl_wr_list); mei_io_list_init(&dev->ctrl_rd_list); + + INIT_DELAYED_WORK(&dev->timer_work, mei_timer); + INIT_WORK(&dev->init_work, mei_host_client_init); + + INIT_LIST_HEAD(&dev->wd_cl.link); + INIT_LIST_HEAD(&dev->iamthif_cl.link); + mei_io_list_init(&dev->amthif_cmd_list); + mei_io_list_init(&dev->amthif_rd_complete_list); + } /** -- cgit v1.2.3 From c4d589be4405d475f7b529134debdf37f1ada957 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Wed, 27 Mar 2013 16:58:28 +0200 Subject: mei: rename function mei_hw_init to mei_start The hw initialization is now done as part of hw specific code this makes the name mei_hw_init little misleading. We rename it to mei_start in spirit of already existing functions mei_stop and mei_reset. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/init.c | 4 ++-- drivers/misc/mei/mei_dev.h | 2 +- drivers/misc/mei/pci-me.c | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 33f56308ba3c..b3f7c3e761a0 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -69,13 +69,13 @@ void mei_device_init(struct mei_device *dev) } /** - * mei_hw_init - initializes host and fw to start work. + * mei_start - initializes host and fw to start work. * * @dev: the device structure * * returns 0 on success, <0 on failure. */ -int mei_hw_init(struct mei_device *dev) +int mei_start(struct mei_device *dev) { int ret = 0; diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 091f50af18a4..b5d66076de3d 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -393,7 +393,7 @@ static inline u32 mei_data2slots(size_t length) */ void mei_device_init(struct mei_device *dev); void mei_reset(struct mei_device *dev, int interrupts); -int mei_hw_init(struct mei_device *dev); +int mei_start(struct mei_device *dev); void mei_stop(struct mei_device *dev); /* diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index 252b1fd315a8..985afd062adb 100644 --- a/drivers/misc/mei/pci-me.c +++ b/drivers/misc/mei/pci-me.c @@ -184,7 +184,7 @@ static int mei_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto disable_msi; } - if (mei_hw_init(dev)) { + if (mei_start(dev)) { dev_err(&pdev->dev, "init hw failure.\n"); err = -ENODEV; goto release_irq; -- cgit v1.2.3 From b68301e9acd30f7fd63533a145f5e003e25ac9bd Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Wed, 27 Mar 2013 16:58:29 +0200 Subject: mei: prefix me hardware specific functions with mei_me_ Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hw-me.c | 36 ++++++++++++++++++------------------ drivers/misc/mei/pci-me.c | 36 ++++++++++++++++++------------------ 2 files changed, 36 insertions(+), 36 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 12c2fa195e56..5ad53ebf57b9 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -26,14 +26,14 @@ /** - * mei_reg_read - Reads 32bit data from the mei device + * mei_me_reg_read - Reads 32bit data from the mei device * * @dev: the device structure * @offset: offset from which to read the data * * returns register value (u32) */ -static inline u32 mei_reg_read(const struct mei_me_hw *hw, +static inline u32 mei_me_reg_read(const struct mei_me_hw *hw, unsigned long offset) { return ioread32(hw->mem_addr + offset); @@ -41,20 +41,20 @@ static inline u32 mei_reg_read(const struct mei_me_hw *hw, /** - * mei_reg_write - Writes 32bit data to the mei device + * mei_me_reg_write - Writes 32bit data to the mei device * * @dev: the device structure * @offset: offset from which to write the data * @value: register value to write (u32) */ -static inline void mei_reg_write(const struct mei_me_hw *hw, +static inline void mei_me_reg_write(const struct mei_me_hw *hw, unsigned long offset, u32 value) { iowrite32(value, hw->mem_addr + offset); } /** - * mei_mecbrw_read - Reads 32bit data from ME circular buffer + * mei_me_mecbrw_read - Reads 32bit data from ME circular buffer * read window register * * @dev: the device structure @@ -63,18 +63,18 @@ static inline void mei_reg_write(const struct mei_me_hw *hw, */ static u32 mei_me_mecbrw_read(const struct mei_device *dev) { - return mei_reg_read(to_me_hw(dev), ME_CB_RW); + return mei_me_reg_read(to_me_hw(dev), ME_CB_RW); } /** - * mei_mecsr_read - Reads 32bit data from the ME CSR + * mei_me_mecsr_read - Reads 32bit data from the ME CSR * * @dev: the device structure * * returns ME_CSR_HA register value (u32) */ -static inline u32 mei_mecsr_read(const struct mei_me_hw *hw) +static inline u32 mei_me_mecsr_read(const struct mei_me_hw *hw) { - return mei_reg_read(hw, ME_CSR_HA); + return mei_me_reg_read(hw, ME_CSR_HA); } /** @@ -86,7 +86,7 @@ static inline u32 mei_mecsr_read(const struct mei_me_hw *hw) */ static inline u32 mei_hcsr_read(const struct mei_me_hw *hw) { - return mei_reg_read(hw, H_CSR); + return mei_me_reg_read(hw, H_CSR); } /** @@ -98,7 +98,7 @@ static inline u32 mei_hcsr_read(const struct mei_me_hw *hw) static inline void mei_hcsr_set(struct mei_me_hw *hw, u32 hcsr) { hcsr &= ~H_IS; - mei_reg_write(hw, H_CSR, hcsr); + mei_me_reg_write(hw, H_CSR, hcsr); } @@ -123,7 +123,7 @@ static void mei_me_intr_clear(struct mei_device *dev) struct mei_me_hw *hw = to_me_hw(dev); u32 hcsr = mei_hcsr_read(hw); if ((hcsr & H_IS) == H_IS) - mei_reg_write(hw, H_CSR, hcsr); + mei_me_reg_write(hw, H_CSR, hcsr); } /** * mei_me_intr_enable - enables mei device interrupts @@ -228,7 +228,7 @@ static bool mei_me_host_is_ready(struct mei_device *dev) static bool mei_me_hw_is_ready(struct mei_device *dev) { struct mei_me_hw *hw = to_me_hw(dev); - hw->me_hw_state = mei_mecsr_read(hw); + hw->me_hw_state = mei_me_mecsr_read(hw); return (hw->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA; } @@ -354,16 +354,16 @@ static int mei_me_write_message(struct mei_device *dev, if (empty_slots < 0 || dw_cnt > empty_slots) return -EIO; - mei_reg_write(hw, H_CB_WW, *((u32 *) header)); + mei_me_reg_write(hw, H_CB_WW, *((u32 *) header)); for (i = 0; i < length / 4; i++) - mei_reg_write(hw, H_CB_WW, reg_buf[i]); + mei_me_reg_write(hw, H_CB_WW, reg_buf[i]); rem = length & 0x3; if (rem > 0) { u32 reg = 0; memcpy(®, &buf[length - rem], rem); - mei_reg_write(hw, H_CB_WW, reg); + mei_me_reg_write(hw, H_CB_WW, reg); } hcsr = mei_hcsr_read(hw) | H_IG; @@ -387,7 +387,7 @@ static int mei_me_count_full_read_slots(struct mei_device *dev) char read_ptr, write_ptr; unsigned char buffer_depth, filled_slots; - hw->me_hw_state = mei_mecsr_read(hw); + hw->me_hw_state = mei_me_mecsr_read(hw); buffer_depth = (unsigned char)((hw->me_hw_state & ME_CBD_HRA) >> 24); read_ptr = (char) ((hw->me_hw_state & ME_CBRP_HRA) >> 8); write_ptr = (char) ((hw->me_hw_state & ME_CBWP_HRA) >> 16); @@ -447,7 +447,7 @@ irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id) return IRQ_NONE; /* clear H_IS bit in H_CSR */ - mei_reg_write(hw, H_CSR, csr_reg); + mei_me_reg_write(hw, H_CSR, csr_reg); return IRQ_WAKE_THREAD; } diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index 985afd062adb..178928eaf6cf 100644 --- a/drivers/misc/mei/pci-me.c +++ b/drivers/misc/mei/pci-me.c @@ -47,7 +47,7 @@ static struct pci_dev *mei_pdev; /* mei_pci_tbl - PCI Device ID Table */ -static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = { +static DEFINE_PCI_DEVICE_TABLE(mei_me_pci_tbl) = { {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)}, {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)}, {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)}, @@ -86,7 +86,7 @@ static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = { {0, } }; -MODULE_DEVICE_TABLE(pci, mei_pci_tbl); +MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl); static DEFINE_MUTEX(mei_mutex); @@ -97,7 +97,7 @@ static DEFINE_MUTEX(mei_mutex); * * returns true if ME Interface is valid, false otherwise */ -static bool mei_quirk_probe(struct pci_dev *pdev, +static bool mei_me_quirk_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { u32 reg; @@ -119,7 +119,7 @@ static bool mei_quirk_probe(struct pci_dev *pdev, * * returns 0 on success, <0 on failure. */ -static int mei_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct mei_device *dev; struct mei_me_hw *hw; @@ -127,7 +127,7 @@ static int mei_probe(struct pci_dev *pdev, const struct pci_device_id *ent) mutex_lock(&mei_mutex); - if (!mei_quirk_probe(pdev, ent)) { + if (!mei_me_quirk_probe(pdev, ent)) { err = -ENODEV; goto end; } @@ -233,7 +233,7 @@ end: * mei_remove is called by the PCI subsystem to alert the driver * that it should release a PCI device. */ -static void mei_remove(struct pci_dev *pdev) +static void mei_me_remove(struct pci_dev *pdev) { struct mei_device *dev; struct mei_me_hw *hw; @@ -272,7 +272,7 @@ static void mei_remove(struct pci_dev *pdev) } #ifdef CONFIG_PM -static int mei_pci_suspend(struct device *device) +static int mei_me_pci_suspend(struct device *device) { struct pci_dev *pdev = to_pci_dev(device); struct mei_device *dev = pci_get_drvdata(pdev); @@ -292,7 +292,7 @@ static int mei_pci_suspend(struct device *device) return 0; } -static int mei_pci_resume(struct device *device) +static int mei_me_pci_resume(struct device *device) { struct pci_dev *pdev = to_pci_dev(device); struct mei_device *dev; @@ -332,24 +332,24 @@ static int mei_pci_resume(struct device *device) return err; } -static SIMPLE_DEV_PM_OPS(mei_pm_ops, mei_pci_suspend, mei_pci_resume); -#define MEI_PM_OPS (&mei_pm_ops) +static SIMPLE_DEV_PM_OPS(mei_me_pm_ops, mei_me_pci_suspend, mei_me_pci_resume); +#define MEI_ME_PM_OPS (&mei_me_pm_ops) #else -#define MEI_PM_OPS NULL +#define MEI_ME_PM_OPS NULL #endif /* CONFIG_PM */ /* * PCI driver structure */ -static struct pci_driver mei_driver = { +static struct pci_driver mei_me_driver = { .name = KBUILD_MODNAME, - .id_table = mei_pci_tbl, - .probe = mei_probe, - .remove = mei_remove, - .shutdown = mei_remove, - .driver.pm = MEI_PM_OPS, + .id_table = mei_me_pci_tbl, + .probe = mei_me_probe, + .remove = mei_me_remove, + .shutdown = mei_me_remove, + .driver.pm = MEI_ME_PM_OPS, }; -module_pci_driver(mei_driver); +module_pci_driver(mei_me_driver); MODULE_AUTHOR("Intel Corporation"); MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); -- cgit v1.2.3 From 40e0b67be099175d069b0cf46f1102f352d46c61 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Wed, 27 Mar 2013 16:58:30 +0200 Subject: mei: move mei-me to separate module mei layer provides host bus message layer, client management, and os interface mei-me - provides access to ME hardware through the pci bus Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/Kconfig | 5 ++--- drivers/misc/mei/Makefile | 6 ++++-- drivers/misc/mei/init.c | 7 +++++-- drivers/misc/mei/interrupt.c | 4 ++++ drivers/misc/mei/main.c | 4 ++++ 5 files changed, 19 insertions(+), 7 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig index d21b4d006a55..c76fa31e9bf6 100644 --- a/drivers/misc/mei/Kconfig +++ b/drivers/misc/mei/Kconfig @@ -10,10 +10,9 @@ config INTEL_MEI config INTEL_MEI_ME - bool "ME Enabled Intel Chipsets" - depends on INTEL_MEI + tristate "ME Enabled Intel Chipsets" + select INTEL_MEI depends on X86 && PCI && WATCHDOG_CORE - default y help MEI support for ME Enabled Intel chipsets. diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile index 040af6c7b147..2c336d087749 100644 --- a/drivers/misc/mei/Makefile +++ b/drivers/misc/mei/Makefile @@ -10,5 +10,7 @@ mei-objs += client.o mei-objs += main.o mei-objs += amthif.o mei-objs += wd.o -mei-$(CONFIG_INTEL_MEI_ME) += pci-me.o -mei-$(CONFIG_INTEL_MEI_ME) += hw-me.o + +obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o +mei-me-objs := pci-me.o +mei-me-objs += hw-me.o diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index b3f7c3e761a0..c1c8d760bc34 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -14,6 +14,7 @@ * */ +#include #include #include #include @@ -67,6 +68,7 @@ void mei_device_init(struct mei_device *dev) mei_io_list_init(&dev->amthif_rd_complete_list); } +EXPORT_SYMBOL_GPL(mei_device_init); /** * mei_start - initializes host and fw to start work. @@ -136,6 +138,7 @@ err: mutex_unlock(&dev->device_lock); return -ENODEV; } +EXPORT_SYMBOL_GPL(mei_start); /** * mei_reset - resets host and fw. @@ -203,6 +206,7 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) /* remove all waiting requests */ mei_cl_all_write_clear(dev); } +EXPORT_SYMBOL_GPL(mei_reset); void mei_stop(struct mei_device *dev) { @@ -222,9 +226,8 @@ void mei_stop(struct mei_device *dev) flush_scheduled_work(); mei_watchdog_unregister(dev); - } - +EXPORT_SYMBOL_GPL(mei_stop); diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 73fbce3e7746..6ce45ef2cd6c 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -15,6 +15,7 @@ */ +#include #include #include #include @@ -78,6 +79,7 @@ void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *compl_list) mei_cl_complete_handler(cl, cb); } } +EXPORT_SYMBOL_GPL(mei_irq_compl_handler); /** * _mei_irq_thread_state_ok - checks if mei header matches file private data * @@ -440,6 +442,7 @@ int mei_irq_read_handler(struct mei_device *dev, end: return ret; } +EXPORT_SYMBOL_GPL(mei_irq_read_handler); /** @@ -590,6 +593,7 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) } return 0; } +EXPORT_SYMBOL_GPL(mei_irq_write_handler); diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 903f809b21f7..27b3df2ba070 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -758,12 +758,16 @@ int mei_register(struct device *dev) mei_misc_device.parent = dev; return misc_register(&mei_misc_device); } +EXPORT_SYMBOL_GPL(mei_register); void mei_deregister(void) { misc_deregister(&mei_misc_device); mei_misc_device.parent = NULL; } +EXPORT_SYMBOL_GPL(mei_deregister); +MODULE_AUTHOR("Intel Corporation"); +MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); MODULE_LICENSE("GPL v2"); -- cgit v1.2.3 From e5354107e14755991da82e0d2a4791db92908d9d Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Wed, 27 Mar 2013 17:29:53 +0200 Subject: mei: bus: Initial MEI Client bus type implementation mei client bus will present some of the mei clients as devices for other standard subsystems Implement the probe, remove, match, device addtion routines, along with the sysfs and uevent ones. mei_cl_device_id is also added to mod_devicetable.h A mei-cleint-bus.txt document describing the rationale and the API usage is also added while ABI/testing/sysfs-bus-mei describeis the modalias ABI. Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- Documentation/ABI/testing/sysfs-bus-mei | 7 + Documentation/misc-devices/mei/mei-client-bus.txt | 135 +++++++++++++++++ drivers/misc/mei/Makefile | 1 + drivers/misc/mei/bus.c | 172 ++++++++++++++++++++++ drivers/misc/mei/mei_dev.h | 26 ++++ include/linux/mei_cl_bus.h | 20 +++ include/linux/mod_devicetable.h | 9 ++ scripts/mod/devicetable-offsets.c | 3 + scripts/mod/file2alias.c | 12 ++ 9 files changed, 385 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-mei create mode 100644 Documentation/misc-devices/mei/mei-client-bus.txt create mode 100644 drivers/misc/mei/bus.c create mode 100644 include/linux/mei_cl_bus.h (limited to 'drivers') diff --git a/Documentation/ABI/testing/sysfs-bus-mei b/Documentation/ABI/testing/sysfs-bus-mei new file mode 100644 index 000000000000..2066f0bbd453 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-mei @@ -0,0 +1,7 @@ +What: /sys/bus/mei/devices/.../modalias +Date: March 2013 +KernelVersion: 3.10 +Contact: Samuel Ortiz + linux-mei@linux.intel.com +Description: Stores the same MODALIAS value emitted by uevent + Format: mei: diff --git a/Documentation/misc-devices/mei/mei-client-bus.txt b/Documentation/misc-devices/mei/mei-client-bus.txt new file mode 100644 index 000000000000..9dc5ebf94eb1 --- /dev/null +++ b/Documentation/misc-devices/mei/mei-client-bus.txt @@ -0,0 +1,135 @@ +Intel(R) Management Engine (ME) Client bus API +=============================================== + + +Rationale +========= +MEI misc character device is useful for dedicated applications to send and receive +data to the many FW appliance found in Intel's ME from the user space. +However for some of the ME functionalities it make sense to leverage existing software +stack and expose them through existing kernel subsystems. + +In order to plug seamlessly into the kernel device driver model we add kernel virtual +bus abstraction on top of the MEI driver. This allows implementing linux kernel drivers +for the various MEI features as a stand alone entities found in their respective subsystem. +Existing device drivers can even potentially be re-used by adding an MEI CL bus layer to +the existing code. + + +MEI CL bus API +=========== +A driver implementation for an MEI Client is very similar to existing bus +based device drivers. The driver registers itself as an MEI CL bus driver through +the mei_cl_driver structure: + +struct mei_cl_driver { + struct device_driver driver; + const char *name; + + const struct mei_cl_device_id *id_table; + + int (*probe)(struct mei_cl_device *dev, const struct mei_cl_id *id); + int (*remove)(struct mei_cl_device *dev); +}; + +struct mei_cl_id { + char name[MEI_NAME_SIZE]; + kernel_ulong_t driver_info; +}; + +The mei_cl_id structure allows the driver to bind itself against a device name. + +To actually register a driver on the ME Client bus one must call the mei_cl_add_driver() +API. This is typically called at module init time. + +Once registered on the ME Client bus, a driver will typically try to do some I/O on +this bus and this should be done through the mei_cl_send() and mei_cl_recv() +routines. The latter is synchronous (blocks and sleeps until data shows up). +In order for drivers to be notified of pending events waiting for them (e.g. +an Rx event) they can register an event handler through the +mei_cl_register_event_cb() routine. Currently only the MEI_EVENT_RX event +will trigger an event handler call and the driver implementation is supposed +to call mei_recv() from the event handler in order to fetch the pending +received buffers. + + +Example +======= +As a theoretical example let's pretend the ME comes with a "contact" NFC IP. +The driver init and exit routines for this device would look like: + +#define CONTACT_DRIVER_NAME "contact" + +static struct mei_cl_device_id contact_mei_cl_tbl[] = { + { CONTACT_DRIVER_NAME, }, + + /* required last entry */ + { } +}; +MODULE_DEVICE_TABLE(mei_cl, contact_mei_cl_tbl); + +static struct mei_cl_driver contact_driver = { + .id_table = contact_mei_tbl, + .name = CONTACT_DRIVER_NAME, + + .probe = contact_probe, + .remove = contact_remove, +}; + +static int contact_init(void) +{ + int r; + + r = mei_cl_driver_register(&contact_driver); + if (r) { + pr_err(CONTACT_DRIVER_NAME ": driver registration failed\n"); + return r; + } + + return 0; +} + +static void __exit contact_exit(void) +{ + mei_cl_driver_unregister(&contact_driver); +} + +module_init(contact_init); +module_exit(contact_exit); + +And the driver's simplified probe routine would look like that: + +int contact_probe(struct mei_cl_device *dev, struct mei_cl_device_id *id) +{ + struct contact_driver *contact; + + [...] + mei_cl_register_event_cb(dev, contact_event_cb, contact); + + return 0; + } + +In the probe routine the driver basically registers an ME bus event handler +which is as close as it can get to registering a threaded IRQ handler. +The handler implementation will typically call some I/O routine depending on +the pending events: + +#define MAX_NFC_PAYLOAD 128 + +static void contact_event_cb(struct mei_cl_device *dev, u32 events, + void *context) +{ + struct contact_driver *contact = context; + + if (events & BIT(MEI_EVENT_RX)) { + u8 payload[MAX_NFC_PAYLOAD]; + int payload_size; + + payload_size = mei_recv(dev, payload, MAX_NFC_PAYLOAD); + if (payload_size <= 0) + return; + + /* Hook to the NFC subsystem */ + nfc_hci_recv_frame(contact->hdev, payload, payload_size); + } +} diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile index 2c336d087749..1b29f7ccac49 100644 --- a/drivers/misc/mei/Makefile +++ b/drivers/misc/mei/Makefile @@ -10,6 +10,7 @@ mei-objs += client.o mei-objs += main.o mei-objs += amthif.o mei-objs += wd.o +mei-objs += bus.o obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o mei-me-objs := pci-me.o diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c new file mode 100644 index 000000000000..78c876af2676 --- /dev/null +++ b/drivers/misc/mei/bus.c @@ -0,0 +1,172 @@ +/* + * Intel Management Engine Interface (Intel MEI) Linux driver + * Copyright (c) 2012-2013, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "mei_dev.h" + +#define to_mei_cl_driver(d) container_of(d, struct mei_cl_driver, driver) +#define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev) + +static int mei_cl_device_match(struct device *dev, struct device_driver *drv) +{ + struct mei_cl_device *device = to_mei_cl_device(dev); + struct mei_cl_driver *driver = to_mei_cl_driver(drv); + const struct mei_cl_device_id *id; + + if (!device) + return 0; + + if (!driver || !driver->id_table) + return 0; + + id = driver->id_table; + + while (id->name[0]) { + if (!strcmp(dev_name(dev), id->name)) + return 1; + + id++; + } + + return 0; +} + +static int mei_cl_device_probe(struct device *dev) +{ + struct mei_cl_device *device = to_mei_cl_device(dev); + struct mei_cl_driver *driver; + struct mei_cl_device_id id; + + if (!device) + return 0; + + driver = to_mei_cl_driver(dev->driver); + if (!driver || !driver->probe) + return -ENODEV; + + dev_dbg(dev, "Device probe\n"); + + strncpy(id.name, dev_name(dev), MEI_CL_NAME_SIZE); + + return driver->probe(device, &id); +} + +static int mei_cl_device_remove(struct device *dev) +{ + struct mei_cl_device *device = to_mei_cl_device(dev); + struct mei_cl_driver *driver; + + if (!device || !dev->driver) + return 0; + + driver = to_mei_cl_driver(dev->driver); + if (!driver->remove) { + dev->driver = NULL; + + return 0; + } + + return driver->remove(device); +} + +static ssize_t modalias_show(struct device *dev, struct device_attribute *a, + char *buf) +{ + int len; + + len = snprintf(buf, PAGE_SIZE, "mei:%s\n", dev_name(dev)); + + return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; +} + +static struct device_attribute mei_cl_dev_attrs[] = { + __ATTR_RO(modalias), + __ATTR_NULL, +}; + +static int mei_cl_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + if (add_uevent_var(env, "MODALIAS=mei:%s", dev_name(dev))) + return -ENOMEM; + + return 0; +} + +static struct bus_type mei_cl_bus_type = { + .name = "mei", + .dev_attrs = mei_cl_dev_attrs, + .match = mei_cl_device_match, + .probe = mei_cl_device_probe, + .remove = mei_cl_device_remove, + .uevent = mei_cl_uevent, +}; + +static void mei_cl_dev_release(struct device *dev) +{ + kfree(to_mei_cl_device(dev)); +} + +static struct device_type mei_cl_device_type = { + .release = mei_cl_dev_release, +}; + +struct mei_cl_device *mei_cl_add_device(struct mei_device *mei_device, + uuid_le uuid, char *name) +{ + struct mei_cl_device *device; + int status; + + device = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL); + if (!device) + return NULL; + + device->dev.parent = &mei_device->pdev->dev; + device->dev.bus = &mei_cl_bus_type; + device->dev.type = &mei_cl_device_type; + + dev_set_name(&device->dev, "%s", name); + + status = device_register(&device->dev); + if (status) + goto out_err; + + dev_dbg(&device->dev, "client %s registered\n", name); + + return device; + +out_err: + dev_err(device->dev.parent, "Failed to register MEI client\n"); + + kfree(device); + + return NULL; +} +EXPORT_SYMBOL_GPL(mei_cl_add_device); + +void mei_cl_remove_device(struct mei_cl_device *device) +{ + device_unregister(&device->dev); +} +EXPORT_SYMBOL_GPL(mei_cl_remove_device); diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index b5d66076de3d..7abb705ddf3f 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -21,6 +21,7 @@ #include #include #include +#include #include "hw.h" #include "hw-me-regs.h" @@ -262,6 +263,31 @@ struct mei_hw_ops { unsigned char *buf, unsigned long len); }; +/* MEI bus API*/ +struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, + uuid_le uuid, char *name); +void mei_cl_remove_device(struct mei_cl_device *device); + +/** + * struct mei_cl_device - MEI device handle + * An mei_cl_device pointer is returned from mei_add_device() + * and links MEI bus clients to their actual ME host client pointer. + * Drivers for MEI devices will get an mei_cl_device pointer + * when being probed and shall use it for doing ME bus I/O. + * + * @dev: linux driver model device pointer + * @uuid: me client uuid + * @cl: mei client + * @priv_data: client private data + */ +struct mei_cl_device { + struct device dev; + + struct mei_cl *cl; + + void *priv_data; +}; + /** * struct mei_device - MEI private device struct diff --git a/include/linux/mei_cl_bus.h b/include/linux/mei_cl_bus.h new file mode 100644 index 000000000000..4e7351de7eca --- /dev/null +++ b/include/linux/mei_cl_bus.h @@ -0,0 +1,20 @@ +#ifndef _LINUX_MEI_CL_BUS_H +#define _LINUX_MEI_CL_BUS_H + +#include +#include + +struct mei_cl_device; + +struct mei_cl_driver { + struct device_driver driver; + const char *name; + + const struct mei_cl_device_id *id_table; + + int (*probe)(struct mei_cl_device *dev, + const struct mei_cl_device_id *id); + int (*remove)(struct mei_cl_device *dev); +}; + +#endif /* _LINUX_MEI_CL_BUS_H */ diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index 779cf7c4a3d1..b508016fb76d 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -9,6 +9,7 @@ #ifdef __KERNEL__ #include +#include typedef unsigned long kernel_ulong_t; #endif @@ -568,4 +569,12 @@ struct ipack_device_id { __u32 device; /* Device ID or IPACK_ANY_ID */ }; +#define MEI_CL_MODULE_PREFIX "mei:" +#define MEI_CL_NAME_SIZE 32 + +struct mei_cl_device_id { + char name[MEI_CL_NAME_SIZE]; + kernel_ulong_t driver_info; +}; + #endif /* LINUX_MOD_DEVICETABLE_H */ diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c index b45260bfeaa0..e66d4d258e1a 100644 --- a/scripts/mod/devicetable-offsets.c +++ b/scripts/mod/devicetable-offsets.c @@ -174,5 +174,8 @@ int main(void) DEVID_FIELD(x86_cpu_id, model); DEVID_FIELD(x86_cpu_id, vendor); + DEVID(mei_cl_device_id); + DEVID_FIELD(mei_cl_device_id, name); + return 0; } diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 771ac17f635d..45f9a3377dcd 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -1133,6 +1133,18 @@ static int do_x86cpu_entry(const char *filename, void *symval, } ADD_TO_DEVTABLE("x86cpu", x86_cpu_id, do_x86cpu_entry); +/* Looks like: mei:S */ +static int do_mei_entry(const char *filename, void *symval, + char *alias) +{ + DEF_FIELD_ADDR(symval, mei_cl_device_id, name); + + sprintf(alias, MEI_CL_MODULE_PREFIX "%s", *name); + + return 1; +} +ADD_TO_DEVTABLE("mei", mei_cl_device_id, do_mei_entry); + /* Does namelen bytes of name exactly match the symbol? */ static bool sym_is(const char *name, unsigned namelen, const char *symbol) { -- cgit v1.2.3 From 333e4ee0781bd0b5938da263c4bb7ab66a0d1b57 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Wed, 27 Mar 2013 17:29:54 +0200 Subject: mei: bus: Implement driver registration Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/bus.c | 26 ++++++++++++++++++++++++++ include/linux/mei_cl_bus.h | 7 +++++++ 2 files changed, 33 insertions(+) (limited to 'drivers') diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 78c876af2676..d16b3c3e1b38 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -170,3 +170,29 @@ void mei_cl_remove_device(struct mei_cl_device *device) device_unregister(&device->dev); } EXPORT_SYMBOL_GPL(mei_cl_remove_device); + +int __mei_cl_driver_register(struct mei_cl_driver *driver, struct module *owner) +{ + int err; + + driver->driver.name = driver->name; + driver->driver.owner = owner; + driver->driver.bus = &mei_cl_bus_type; + + err = driver_register(&driver->driver); + if (err) + return err; + + pr_debug("mei: driver [%s] registered\n", driver->driver.name); + + return 0; +} +EXPORT_SYMBOL_GPL(__mei_cl_driver_register); + +void mei_cl_driver_unregister(struct mei_cl_driver *driver) +{ + driver_unregister(&driver->driver); + + pr_debug("mei: driver [%s] unregistered\n", driver->driver.name); +} +EXPORT_SYMBOL_GPL(mei_cl_driver_unregister); diff --git a/include/linux/mei_cl_bus.h b/include/linux/mei_cl_bus.h index 4e7351de7eca..ba2aa3b66f30 100644 --- a/include/linux/mei_cl_bus.h +++ b/include/linux/mei_cl_bus.h @@ -17,4 +17,11 @@ struct mei_cl_driver { int (*remove)(struct mei_cl_device *dev); }; +int __mei_cl_driver_register(struct mei_cl_driver *driver, + struct module *owner); +#define mei_cl_driver_register(driver) \ + __mei_cl_driver_register(driver, THIS_MODULE) + +void mei_cl_driver_unregister(struct mei_cl_driver *driver); + #endif /* _LINUX_MEI_CL_BUS_H */ -- cgit v1.2.3 From 3e8332952dedd2c17bb497e3909e3b6fbac10ce7 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Wed, 27 Mar 2013 17:29:55 +0200 Subject: mei: bus: Initial implementation for I/O routines Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/bus.c | 226 +++++++++++++++++++++++++++++++++++++++++++++ drivers/misc/mei/mei_dev.h | 30 ++++++ include/linux/mei_cl_bus.h | 11 +++ 3 files changed, 267 insertions(+) (limited to 'drivers') diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index d16b3c3e1b38..16c7fff50549 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -25,6 +26,8 @@ #include #include "mei_dev.h" +#include "hw-me.h" +#include "client.h" #define to_mei_cl_driver(d) container_of(d, struct mei_cl_driver, driver) #define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev) @@ -81,6 +84,11 @@ static int mei_cl_device_remove(struct device *dev) if (!device || !dev->driver) return 0; + if (device->event_cb) { + device->event_cb = NULL; + cancel_work_sync(&device->event_work); + } + driver = to_mei_cl_driver(dev->driver); if (!driver->remove) { dev->driver = NULL; @@ -196,3 +204,221 @@ void mei_cl_driver_unregister(struct mei_cl_driver *driver) pr_debug("mei: driver [%s] unregistered\n", driver->driver.name); } EXPORT_SYMBOL_GPL(mei_cl_driver_unregister); + +int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length) +{ + struct mei_device *dev; + struct mei_msg_hdr mei_hdr; + struct mei_cl_cb *cb; + int me_cl_id, err; + + if (WARN_ON(!cl || !cl->dev)) + return -ENODEV; + + if (cl->state != MEI_FILE_CONNECTED) + return -ENODEV; + + cb = mei_io_cb_init(cl, NULL); + if (!cb) + return -ENOMEM; + + err = mei_io_cb_alloc_req_buf(cb, length); + if (err < 0) { + mei_io_cb_free(cb); + return err; + } + + memcpy(cb->request_buffer.data, buf, length); + cb->fop_type = MEI_FOP_WRITE; + + dev = cl->dev; + + mutex_lock(&dev->device_lock); + + /* Check if we have an ME client device */ + me_cl_id = mei_me_cl_by_id(dev, cl->me_client_id); + if (me_cl_id == dev->me_clients_num) { + err = -ENODEV; + goto out_err; + } + + if (length > dev->me_clients[me_cl_id].props.max_msg_length) { + err = -EINVAL; + goto out_err; + } + + err = mei_cl_flow_ctrl_creds(cl); + if (err < 0) + goto out_err; + + /* Host buffer is not ready, we queue the request */ + if (err == 0 || !dev->hbuf_is_ready) { + cb->buf_idx = 0; + mei_hdr.msg_complete = 0; + cl->writing_state = MEI_WRITING; + list_add_tail(&cb->list, &dev->write_list.list); + + mutex_unlock(&dev->device_lock); + + return length; + } + + dev->hbuf_is_ready = false; + + /* Check for a maximum length */ + if (length > mei_hbuf_max_len(dev)) { + mei_hdr.length = mei_hbuf_max_len(dev); + mei_hdr.msg_complete = 0; + } else { + mei_hdr.length = length; + mei_hdr.msg_complete = 1; + } + + mei_hdr.host_addr = cl->host_client_id; + mei_hdr.me_addr = cl->me_client_id; + mei_hdr.reserved = 0; + + if (mei_write_message(dev, &mei_hdr, buf)) { + err = -EIO; + goto out_err; + } + + cl->writing_state = MEI_WRITING; + cb->buf_idx = mei_hdr.length; + + if (!mei_hdr.msg_complete) { + list_add_tail(&cb->list, &dev->write_list.list); + } else { + if (mei_cl_flow_ctrl_reduce(cl)) { + err = -EIO; + goto out_err; + } + + list_add_tail(&cb->list, &dev->write_waiting_list.list); + } + + mutex_unlock(&dev->device_lock); + + return mei_hdr.length; + +out_err: + mutex_unlock(&dev->device_lock); + mei_io_cb_free(cb); + + return err; +} + +int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length) +{ + struct mei_device *dev; + struct mei_cl_cb *cb; + size_t r_length; + int err; + + if (WARN_ON(!cl || !cl->dev)) + return -ENODEV; + + dev = cl->dev; + + mutex_lock(&dev->device_lock); + + if (!cl->read_cb) { + err = mei_cl_read_start(cl); + if (err < 0) { + mutex_unlock(&dev->device_lock); + return err; + } + } + + if (cl->reading_state != MEI_READ_COMPLETE && + !waitqueue_active(&cl->rx_wait)) { + mutex_unlock(&dev->device_lock); + + if (wait_event_interruptible(cl->rx_wait, + (MEI_READ_COMPLETE == cl->reading_state))) { + if (signal_pending(current)) + return -EINTR; + return -ERESTARTSYS; + } + + mutex_lock(&dev->device_lock); + } + + cb = cl->read_cb; + + if (cl->reading_state != MEI_READ_COMPLETE) { + r_length = 0; + goto out; + } + + r_length = min_t(size_t, length, cb->buf_idx); + + memcpy(buf, cb->response_buffer.data, r_length); + + mei_io_cb_free(cb); + cl->reading_state = MEI_IDLE; + cl->read_cb = NULL; + +out: + mutex_unlock(&dev->device_lock); + + return r_length; +} + +int mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length) +{ + struct mei_cl *cl = NULL; + + /* TODO: hook between mei_bus_client and mei_cl */ + + if (device->ops && device->ops->send) + return device->ops->send(device, buf, length); + + return __mei_cl_send(cl, buf, length); +} +EXPORT_SYMBOL_GPL(mei_cl_send); + +int mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length) +{ + struct mei_cl *cl = NULL; + + /* TODO: hook between mei_bus_client and mei_cl */ + + if (device->ops && device->ops->recv) + return device->ops->recv(device, buf, length); + + return __mei_cl_recv(cl, buf, length); +} +EXPORT_SYMBOL_GPL(mei_cl_recv); + +static void mei_bus_event_work(struct work_struct *work) +{ + struct mei_cl_device *device; + + device = container_of(work, struct mei_cl_device, event_work); + + if (device->event_cb) + device->event_cb(device, device->events, device->event_context); + + device->events = 0; + + /* Prepare for the next read */ + mei_cl_read_start(device->cl); +} + +int mei_cl_register_event_cb(struct mei_cl_device *device, + mei_cl_event_cb_t event_cb, void *context) +{ + if (device->event_cb) + return -EALREADY; + + device->events = 0; + device->event_cb = event_cb; + device->event_context = context; + INIT_WORK(&device->event_work, mei_bus_event_work); + + mei_cl_read_start(device->cl); + + return 0; +} +EXPORT_SYMBOL_GPL(mei_cl_register_event_cb); diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 7abb705ddf3f..cde5687039f3 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -268,6 +268,25 @@ struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, uuid_le uuid, char *name); void mei_cl_remove_device(struct mei_cl_device *device); +int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length); +int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length); + +/** + * struct mei_cl_transport_ops - MEI CL device transport ops + * This structure allows ME host clients to implement technology + * specific transport layers. + * + * @send: Tx hook for the device. This allows ME host clients to trap + * the device driver buffers before actually physically + * pushing it to the ME. + * @recv: Rx hook for the device. This allows ME host clients to trap the + * ME buffers before forwarding them to the device driver. + */ +struct mei_cl_transport_ops { + int (*send)(struct mei_cl_device *device, u8 *buf, size_t length); + int (*recv)(struct mei_cl_device *device, u8 *buf, size_t length); +}; + /** * struct mei_cl_device - MEI device handle * An mei_cl_device pointer is returned from mei_add_device() @@ -278,6 +297,10 @@ void mei_cl_remove_device(struct mei_cl_device *device); * @dev: linux driver model device pointer * @uuid: me client uuid * @cl: mei client + * @ops: ME transport ops + * @event_cb: Drivers register this callback to get asynchronous ME + * events (e.g. Rx buffer pending) notifications. + * @events: Events bitmask sent to the driver. * @priv_data: client private data */ struct mei_cl_device { @@ -285,6 +308,13 @@ struct mei_cl_device { struct mei_cl *cl; + const struct mei_cl_transport_ops *ops; + + struct work_struct event_work; + mei_cl_event_cb_t event_cb; + void *event_context; + unsigned long events; + void *priv_data; }; diff --git a/include/linux/mei_cl_bus.h b/include/linux/mei_cl_bus.h index ba2aa3b66f30..d9958c3960a2 100644 --- a/include/linux/mei_cl_bus.h +++ b/include/linux/mei_cl_bus.h @@ -24,4 +24,15 @@ int __mei_cl_driver_register(struct mei_cl_driver *driver, void mei_cl_driver_unregister(struct mei_cl_driver *driver); +int mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length); +int mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length); + +typedef void (*mei_cl_event_cb_t)(struct mei_cl_device *device, + u32 events, void *context); +int mei_cl_register_event_cb(struct mei_cl_device *device, + mei_cl_event_cb_t read_cb, void *context); + +#define MEI_CL_EVENT_RX 0 +#define MEI_CL_EVENT_TX 1 + #endif /* _LINUX_MEI_CL_BUS_H */ -- cgit v1.2.3 From a7b71bc043aded9da4cf51f85271e0779161fe22 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Wed, 27 Mar 2013 17:29:56 +0200 Subject: mei: bus: Add bus related structures to mei_cl We keep track of all MEI devices on the bus through a specific linked list. We also have a mei_device instance in the mei_cl structure. Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/bus.c | 49 ++++++++++++++++++++++++++++++++-------------- drivers/misc/mei/client.c | 1 + drivers/misc/mei/init.c | 1 + drivers/misc/mei/mei_dev.h | 8 ++++++++ 4 files changed, 44 insertions(+), 15 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 16c7fff50549..162cd542cac9 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -140,36 +140,53 @@ static struct device_type mei_cl_device_type = { .release = mei_cl_dev_release, }; -struct mei_cl_device *mei_cl_add_device(struct mei_device *mei_device, +static struct mei_cl *mei_bus_find_mei_cl_by_uuid(struct mei_device *dev, + uuid_le uuid) +{ + struct mei_cl *cl, *next; + + list_for_each_entry_safe(cl, next, &dev->device_list, device_link) { + if (!uuid_le_cmp(uuid, cl->device_uuid)) + return cl; + } + + return NULL; +} +struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, uuid_le uuid, char *name) { struct mei_cl_device *device; + struct mei_cl *cl; int status; + cl = mei_bus_find_mei_cl_by_uuid(dev, uuid); + if (cl == NULL) + return NULL; + device = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL); if (!device) return NULL; - device->dev.parent = &mei_device->pdev->dev; + device->cl = cl; + + device->dev.parent = &dev->pdev->dev; device->dev.bus = &mei_cl_bus_type; device->dev.type = &mei_cl_device_type; dev_set_name(&device->dev, "%s", name); status = device_register(&device->dev); - if (status) - goto out_err; + if (status) { + dev_err(&dev->pdev->dev, "Failed to register MEI device\n"); + kfree(device); + return NULL; + } + + cl->device = device; dev_dbg(&device->dev, "client %s registered\n", name); return device; - -out_err: - dev_err(device->dev.parent, "Failed to register MEI client\n"); - - kfree(device); - - return NULL; } EXPORT_SYMBOL_GPL(mei_cl_add_device); @@ -367,9 +384,10 @@ out: int mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length) { - struct mei_cl *cl = NULL; + struct mei_cl *cl = device->cl; - /* TODO: hook between mei_bus_client and mei_cl */ + if (cl == NULL) + return -ENODEV; if (device->ops && device->ops->send) return device->ops->send(device, buf, length); @@ -380,9 +398,10 @@ EXPORT_SYMBOL_GPL(mei_cl_send); int mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length) { - struct mei_cl *cl = NULL; + struct mei_cl *cl = device->cl; - /* TODO: hook between mei_bus_client and mei_cl */ + if (cl == NULL) + return -ENODEV; if (device->ops && device->ops->recv) return device->ops->recv(device, buf, length); diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index 1569afe935de..e14397b09187 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -216,6 +216,7 @@ void mei_cl_init(struct mei_cl *cl, struct mei_device *dev) init_waitqueue_head(&cl->rx_wait); init_waitqueue_head(&cl->tx_wait); INIT_LIST_HEAD(&cl->link); + INIT_LIST_HEAD(&cl->device_link); cl->reading_state = MEI_IDLE; cl->writing_state = MEI_IDLE; cl->dev = dev; diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index c1c8d760bc34..54b51c05fa41 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -47,6 +47,7 @@ void mei_device_init(struct mei_device *dev) { /* setup our list array */ INIT_LIST_HEAD(&dev->file_list); + INIT_LIST_HEAD(&dev->device_list); mutex_init(&dev->device_lock); init_waitqueue_head(&dev->wait_hw_ready); init_waitqueue_head(&dev->wait_recvd_msg); diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index cde5687039f3..0313c24a1a49 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -209,6 +209,11 @@ struct mei_cl { enum mei_file_transaction_states writing_state; int sm_state; struct mei_cl_cb *read_cb; + + /* MEI CL bus data */ + struct mei_cl_device *device; + struct list_head device_link; + uuid_le device_uuid; }; /** struct mei_hw_ops @@ -423,6 +428,9 @@ struct mei_device { struct work_struct init_work; + /* List of bus devices */ + struct list_head device_list; + const struct mei_hw_ops *ops; char hw[0] __aligned(sizeof(void *)); }; -- cgit v1.2.3 From cf3baefba04073237decb1b8a8c114b0b45bfc80 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Wed, 27 Mar 2013 17:29:57 +0200 Subject: mei: bus: Call bus routines from the core code Register the MEI bus type against the kernel core bus APIs and call the bus Rx handler from interrupt.c Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/bus.c | 22 ++++++++++++++++++++++ drivers/misc/mei/interrupt.c | 2 ++ drivers/misc/mei/main.c | 13 +++++++++++++ drivers/misc/mei/mei_dev.h | 6 +++++- drivers/misc/mei/pci-me.c | 1 - 5 files changed, 42 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 162cd542cac9..c626dc9937eb 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -441,3 +441,25 @@ int mei_cl_register_event_cb(struct mei_cl_device *device, return 0; } EXPORT_SYMBOL_GPL(mei_cl_register_event_cb); + +void mei_cl_bus_rx_event(struct mei_cl *cl) +{ + struct mei_cl_device *device = cl->device; + + if (!device || !device->event_cb) + return; + + set_bit(MEI_CL_EVENT_RX, &device->events); + + schedule_work(&device->event_work); +} + +int __init mei_cl_bus_init(void) +{ + return bus_register(&mei_cl_bus_type); +} + +void __exit mei_cl_bus_exit(void) +{ + bus_unregister(&mei_cl_bus_type); +} diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 6ce45ef2cd6c..255e0853479c 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -50,6 +50,8 @@ static void mei_cl_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb) cl->reading_state = MEI_READ_COMPLETE; if (waitqueue_active(&cl->rx_wait)) wake_up_interruptible(&cl->rx_wait); + else + mei_cl_bus_rx_event(cl); } } diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 27b3df2ba070..872de9d1494b 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -767,6 +767,19 @@ void mei_deregister(void) } EXPORT_SYMBOL_GPL(mei_deregister); +static int __init mei_init(void) +{ + return mei_cl_bus_init(); +} + +static void __exit mei_exit(void) +{ + mei_cl_bus_exit(); +} + +module_init(mei_init); +module_exit(mei_exit); + MODULE_AUTHOR("Intel Corporation"); MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 0313c24a1a49..7d594bedc685 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -292,6 +292,11 @@ struct mei_cl_transport_ops { int (*recv)(struct mei_cl_device *device, u8 *buf, size_t length); }; +void mei_cl_bus_rx_event(struct mei_cl *cl); +int mei_cl_bus_init(void); +void mei_cl_bus_exit(void); + + /** * struct mei_cl_device - MEI device handle * An mei_cl_device pointer is returned from mei_add_device() @@ -451,7 +456,6 @@ static inline u32 mei_data2slots(size_t length) return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4); } - /* * mei init function prototypes */ diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index 178928eaf6cf..a1a582b66f0d 100644 --- a/drivers/misc/mei/pci-me.c +++ b/drivers/misc/mei/pci-me.c @@ -197,7 +197,6 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) mei_pdev = pdev; pci_set_drvdata(pdev, dev); - schedule_delayed_work(&dev->timer_work, HZ); mutex_unlock(&mei_mutex); -- cgit v1.2.3 From 44d88d919261256e3bd999cde05572c8c4afb642 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Wed, 27 Mar 2013 17:29:58 +0200 Subject: mei: bus: Synchronous API for the data transmission Define a truly synchronous API for the bus Tx path by putting all pending request to the write list and wait for the interrupt tx handler to wake us up. The ___mei_cl_send() out path is also slightly reworked to make it look more like main.c:mei_write(). Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/bus.c | 39 +++++++++++++++++++++++++++++---------- drivers/misc/mei/mei_dev.h | 1 + 2 files changed, 30 insertions(+), 10 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index c626dc9937eb..2b4b5b3f639f 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -222,7 +222,8 @@ void mei_cl_driver_unregister(struct mei_cl_driver *driver) } EXPORT_SYMBOL_GPL(mei_cl_driver_unregister); -int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length) +static int ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, + bool blocking) { struct mei_device *dev; struct mei_msg_hdr mei_hdr; @@ -273,11 +274,8 @@ int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length) cb->buf_idx = 0; mei_hdr.msg_complete = 0; cl->writing_state = MEI_WRITING; - list_add_tail(&cb->list, &dev->write_list.list); - - mutex_unlock(&dev->device_lock); - return length; + goto out; } dev->hbuf_is_ready = false; @@ -303,19 +301,30 @@ int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length) cl->writing_state = MEI_WRITING; cb->buf_idx = mei_hdr.length; - if (!mei_hdr.msg_complete) { - list_add_tail(&cb->list, &dev->write_list.list); - } else { +out: + if (mei_hdr.msg_complete) { if (mei_cl_flow_ctrl_reduce(cl)) { - err = -EIO; + err = -ENODEV; goto out_err; } - list_add_tail(&cb->list, &dev->write_waiting_list.list); + } else { + list_add_tail(&cb->list, &dev->write_list.list); } mutex_unlock(&dev->device_lock); + if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) { + if (wait_event_interruptible(cl->tx_wait, + cl->writing_state == MEI_WRITE_COMPLETE)) { + if (signal_pending(current)) + err = -EINTR; + err = -ERESTARTSYS; + mutex_lock(&dev->device_lock); + goto out_err; + } + } + return mei_hdr.length; out_err: @@ -382,6 +391,16 @@ out: return r_length; } +inline int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length) +{ + return ___mei_cl_send(cl, buf, length, 0); +} + +inline int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length) +{ + return ___mei_cl_send(cl, buf, length, 1); +} + int mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length) { struct mei_cl *cl = device->cl; diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 7d594bedc685..325f71abeb7a 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -273,6 +273,7 @@ struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, uuid_le uuid, char *name); void mei_cl_remove_device(struct mei_cl_device *device); +int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length); int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length); int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length); -- cgit v1.2.3 From aa6aef216f8aea1a00b56aafc29b8745237a9b62 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Wed, 27 Mar 2013 17:29:59 +0200 Subject: mei: bus: Implement bus driver data setter/getter MEI drivers should be able to carry their private data around. Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/bus.c | 12 ++++++++++++ include/linux/mei_cl_bus.h | 3 +++ 2 files changed, 15 insertions(+) (limited to 'drivers') diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 2b4b5b3f639f..8dbcb1516dc6 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -461,6 +461,18 @@ int mei_cl_register_event_cb(struct mei_cl_device *device, } EXPORT_SYMBOL_GPL(mei_cl_register_event_cb); +void *mei_cl_get_drvdata(const struct mei_cl_device *device) +{ + return dev_get_drvdata(&device->dev); +} +EXPORT_SYMBOL_GPL(mei_cl_get_drvdata); + +void mei_cl_set_drvdata(struct mei_cl_device *device, void *data) +{ + dev_set_drvdata(&device->dev, data); +} +EXPORT_SYMBOL_GPL(mei_cl_set_drvdata); + void mei_cl_bus_rx_event(struct mei_cl *cl) { struct mei_cl_device *device = cl->device; diff --git a/include/linux/mei_cl_bus.h b/include/linux/mei_cl_bus.h index d9958c3960a2..1bece18825ba 100644 --- a/include/linux/mei_cl_bus.h +++ b/include/linux/mei_cl_bus.h @@ -35,4 +35,7 @@ int mei_cl_register_event_cb(struct mei_cl_device *device, #define MEI_CL_EVENT_RX 0 #define MEI_CL_EVENT_TX 1 +void *mei_cl_get_drvdata(const struct mei_cl_device *device); +void mei_cl_set_drvdata(struct mei_cl_device *device, void *data); + #endif /* _LINUX_MEI_CL_BUS_H */ -- cgit v1.2.3 From 688ef20250c472e183f34709c4be12af6341f927 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Tue, 26 Mar 2013 16:05:06 +0900 Subject: misc: bh1780gli: add CONFIG_PM_SLEEP to suspend/resume functions Add CONFIG_PM_SLEEP to suspend/resume functions to fix the following build warning when CONFIG_PM_SLEEP is not selected. This is because sleep PM callbacks defined by SIMPLE_DEV_PM_OPS are only used when the CONFIG_PM_SLEEP is enabled. drivers/misc/bh1780gli.c:200:12: warning: 'bh1780_suspend' defined but not used [-Wunused-function] drivers/misc/bh1780gli.c:222:12: warning: 'bh1780_resume' defined but not used [-Wunused-function] Signed-off-by: Jingoo Han Signed-off-by: Greg Kroah-Hartman --- drivers/misc/bh1780gli.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/bh1780gli.c b/drivers/misc/bh1780gli.c index cf03d0abf33e..818f3a0e62bf 100644 --- a/drivers/misc/bh1780gli.c +++ b/drivers/misc/bh1780gli.c @@ -196,7 +196,7 @@ static int bh1780_remove(struct i2c_client *client) return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int bh1780_suspend(struct device *dev) { struct bh1780_data *ddata; @@ -235,11 +235,9 @@ static int bh1780_resume(struct device *dev) return 0; } +#endif /* CONFIG_PM_SLEEP */ + static SIMPLE_DEV_PM_OPS(bh1780_pm, bh1780_suspend, bh1780_resume); -#define BH1780_PMOPS (&bh1780_pm) -#else -#define BH1780_PMOPS NULL -#endif /* CONFIG_PM */ static const struct i2c_device_id bh1780_id[] = { { "bh1780", 0 }, @@ -252,7 +250,7 @@ static struct i2c_driver bh1780_driver = { .id_table = bh1780_id, .driver = { .name = "bh1780", - .pm = BH1780_PMOPS, + .pm = &bh1780_pm, }, }; -- cgit v1.2.3 From 0ca19d6f5feb57dcd5645c0761282e1b9fc3afcb Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Tue, 26 Mar 2013 16:05:36 +0900 Subject: misc: bh1770glc: add CONFIG_PM_SLEEP to suspend/resume functions Add CONFIG_PM_SLEEP to suspend/resume functions to fix the following build warning when CONFIG_PM_SLEEP is not selected. This is because sleep PM callbacks defined by SET_SYSTEM_SLEEP_PM_OPS are only used when the CONFIG_PM_SLEEP is enabled. drivers/misc/bh1770glc.c:1314:12: warning: 'bh1770_suspend' defined but not used [-Wunused-function] drivers/misc/bh1770glc.c:1324:12: warning: 'bh1770_resume' defined but not used [-Wunused-function] Signed-off-by: Jingoo Han Signed-off-by: Greg Kroah-Hartman --- drivers/misc/bh1770glc.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/bh1770glc.c b/drivers/misc/bh1770glc.c index 2ed8fc3be7e6..f4975f7d0d5b 100644 --- a/drivers/misc/bh1770glc.c +++ b/drivers/misc/bh1770glc.c @@ -1310,7 +1310,7 @@ static int bh1770_remove(struct i2c_client *client) return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int bh1770_suspend(struct device *dev) { struct i2c_client *client = container_of(dev, struct i2c_client, dev); @@ -1346,11 +1346,6 @@ static int bh1770_resume(struct device *dev) } return ret; } - -#else -#define bh1770_suspend NULL -#define bh1770_shutdown NULL -#define bh1770_resume NULL #endif #ifdef CONFIG_PM_RUNTIME -- cgit v1.2.3 From 39d791649781f6bb6937a217764a928b660375e2 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Tue, 26 Mar 2013 16:05:58 +0900 Subject: misc: apds990x: add CONFIG_PM_SLEEP to suspend/resume functions Add CONFIG_PM_SLEEP to suspend/resume functions to fix the following build warning when CONFIG_PM_SLEEP is not selected. This is because sleep PM callbacks defined by SET_SYSTEM_SLEEP_PM_OPS are only used when the CONFIG_PM_SLEEP is enabled. drivers/misc/apds990x.c:1205:12: warning: 'apds990x_suspend' defined but not used [-Wunused-function] drivers/misc/apds990x.c:1214:12: warning: 'apds990x_resume' defined but not used [-Wunused-function] Signed-off-by: Jingoo Han Signed-off-by: Greg Kroah-Hartman --- drivers/misc/apds990x.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/apds990x.c b/drivers/misc/apds990x.c index 1efb6a4ea397..98f9bb26492a 100644 --- a/drivers/misc/apds990x.c +++ b/drivers/misc/apds990x.c @@ -1201,7 +1201,7 @@ static int apds990x_remove(struct i2c_client *client) return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int apds990x_suspend(struct device *dev) { struct i2c_client *client = container_of(dev, struct i2c_client, dev); @@ -1224,10 +1224,6 @@ static int apds990x_resume(struct device *dev) return 0; } -#else -#define apds990x_suspend NULL -#define apds990x_resume NULL -#define apds990x_shutdown NULL #endif #ifdef CONFIG_PM_RUNTIME -- cgit v1.2.3 From 647965a268fd876781dd9899185482682bf42f6a Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 29 Mar 2013 07:36:11 -0700 Subject: Drivers: hv: balloon: Permit Linux to specify hot-add alignment requirements Some Windows hosts permit the guest to specify memory hot-add alignment requirements (if any). Linux currently requires a 128MB alignment on memory segments that can be hot-added. Specify this alignment requirement to the host. Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_balloon.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index d5225261ee54..2250bf532bb0 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -117,7 +117,14 @@ union dm_caps { struct { __u64 balloon:1; __u64 hot_add:1; - __u64 reservedz:62; + /* + * To support guests that may have alignment + * limitations on hot-add, the guest can specify + * its alignment requirements; a value of n + * represents an alignment of 2^n in mega bytes. + */ + __u64 hot_add_alignment:4; + __u64 reservedz:58; } cap_bits; __u64 caps; } __packed; @@ -774,7 +781,7 @@ static unsigned long process_hot_add(unsigned long pg_start, * If the host has specified a hot-add range; deal with it first. */ - if ((rg_size != 0) && (!dm_device.host_specified_ha_region)) { + if (rg_size != 0) { ha_region = kzalloc(sizeof(struct hv_hotadd_state), GFP_KERNEL); if (!ha_region) return 0; @@ -1366,6 +1373,12 @@ static int balloon_probe(struct hv_device *dev, cap_msg.caps.cap_bits.balloon = 1; cap_msg.caps.cap_bits.hot_add = 1; + /* + * Specify our alignment requirements as it relates + * memory hot-add. Specify 128MB alignment. + */ + cap_msg.caps.cap_bits.hot_add_alignment = 7; + /* * Currently the host does not use these * values and we set them to what is done in the -- cgit v1.2.3 From f766dc1ea576fcdfbf2bc5638757ddbdacfb5a69 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Mon, 18 Mar 2013 13:51:37 -0700 Subject: Drivers: hv: balloon: Support 2M page allocations for ballooning On Hyper-V it will be very efficient to use 2M allocations in the guest as this makes the ballooning protocol with the host that much more efficient. Hyper-V uses page ranges (start pfn : number of pages) to specify memory being moved around and with 2M pages this encoding can be very efficient. However, when memory is returned to the guest, the host does not guarantee any granularity. To deal with this issue, split the page soon after a successful 2M allocation so that this memory can potentially be freed as 4K pages. If 2M allocations fail, we revert to 4K allocations. In this version of the patch, based on the feedback from Michal Hocko , I have added some additional commentary to the patch description. Cc: Michal Hocko Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_balloon.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 2250bf532bb0..d1b4a4624d81 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1004,6 +1004,14 @@ static int alloc_balloon_pages(struct hv_dynmem_device *dm, int num_pages, dm->num_pages_ballooned += alloc_unit; + /* + * If we allocatted 2M pages; split them so we + * can free them in any order we get. + */ + + if (alloc_unit != 1) + split_page(pg, get_order(alloc_unit << PAGE_SHIFT)); + bl_resp->range_count++; bl_resp->range_array[i].finfo.start_page = page_to_pfn(pg); @@ -1030,9 +1038,10 @@ static void balloon_up(struct work_struct *dummy) /* - * Currently, we only support 4k allocations. + * We will attempt 2M allocations. However, if we fail to + * allocate 2M chunks, we will go back to 4k allocations. */ - alloc_unit = 1; + alloc_unit = 512; while (!done) { bl_resp = (struct dm_balloon_response *)send_buffer; @@ -1048,6 +1057,11 @@ static void balloon_up(struct work_struct *dummy) bl_resp, alloc_unit, &alloc_error); + if ((alloc_error) && (alloc_unit != 1)) { + alloc_unit = 1; + continue; + } + if ((alloc_error) || (num_ballooned == num_pages)) { bl_resp->more_pages = 0; done = true; -- cgit v1.2.3 From 7f4f2302a11173d0ef84bbab4b887b9b50c31dc6 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Mon, 18 Mar 2013 13:51:38 -0700 Subject: Drivers: hv: Notify the host of permanent hot-add failures If memory hot-add fails with the error -EEXIST, then this is a permanent failure. Notify the host of this information, so the host will not attempt hot-add again. If the failure were a transient failure, host will attempt a hot-add after some delay. In this version of the patch, I have added some additional comments to clarify how the host treats different failure conditions. Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_balloon.c | 33 +++++++++++++++++++++++++++++++-- 1 file changed, 31 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index d1b4a4624d81..4c605c70ebf9 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -590,6 +590,16 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size, if (ret) { pr_info("hot_add memory failed error is %d\n", ret); + if (ret == -EEXIST) { + /* + * This error indicates that the error + * is not a transient failure. This is the + * case where the guest's physical address map + * precludes hot adding memory. Stop all further + * memory hot-add. + */ + do_hot_add = false; + } has->ha_end_pfn -= HA_CHUNK; has->covered_end_pfn -= processed_pfn; break; @@ -849,11 +859,30 @@ static void hot_add_req(struct work_struct *dummy) rg_sz = region_size; } - resp.page_count = process_hot_add(pg_start, pfn_cnt, - rg_start, rg_sz); + if (do_hot_add) + resp.page_count = process_hot_add(pg_start, pfn_cnt, + rg_start, rg_sz); #endif + /* + * The result field of the response structure has the + * following semantics: + * + * 1. If all or some pages hot-added: Guest should return success. + * + * 2. If no pages could be hot-added: + * + * If the guest returns success, then the host + * will not attempt any further hot-add operations. This + * signifies a permanent failure. + * + * If the guest returns failure, then this failure will be + * treated as a transient failure and the host may retry the + * hot-add operation after some delay. + */ if (resp.page_count > 0) resp.result = 1; + else if (!do_hot_add) + resp.result = 1; else resp.result = 0; -- cgit v1.2.3 From 5ed0505c713805f89473cdc0bbfb5110dfd840cb Mon Sep 17 00:00:00 2001 From: Damian Hobson-Garcia Date: Tue, 26 Mar 2013 10:31:22 +0900 Subject: drivers: uio: Fix UIO device registration failure Until recently uio_get_minor() returned 0 for success and a negative value on failure. This became non-negative for suceess and negative for failure. Restore the original return value spec so that we can successfully initialize UIO devices with a non-zero minor device number. Cc: "Hans J. Koch" Signed-off-by: Damian Hobson-Garcia Signed-off-by: Greg Kroah-Hartman --- drivers/uio/uio.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers') diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index c8b926291e28..b645c47501b4 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -374,6 +374,7 @@ static int uio_get_minor(struct uio_device *idev) retval = idr_alloc(&uio_idr, idev, 0, UIO_MAX_DEVICES, GFP_KERNEL); if (retval >= 0) { idev->minor = retval; + retval = 0; } else if (retval == -ENOSPC) { dev_err(idev->dev, "too many uio devices\n"); retval = -EINVAL; -- cgit v1.2.3 From 945480b159aa0869bf5dadc07fdbae964882820b Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Sat, 30 Mar 2013 20:48:16 +0100 Subject: cs5535-mfgpt: Add another reset method The CS5535/CS5536 MFGPT has no support to reset the device. The current method uses an undocumented bit but does not work on all devices. At least on my ALIX board it completely freezes the board. This new method tries to soft reset all timers by unconfiguring them. But this does not clear the RO setup register and therefore it has to be ignored while probing. Resetting the timers is not only needed on broken BIOSes also when kexec is used. Otherwise the new kernel will find preconfigured timers and odd things will happen. Signed-off-by: Richard Weinberger Signed-off-by: Greg Kroah-Hartman --- drivers/misc/cs5535-mfgpt.c | 41 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 37 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/cs5535-mfgpt.c b/drivers/misc/cs5535-mfgpt.c index 9858f36dad8b..6bdb3baf7bcf 100644 --- a/drivers/misc/cs5535-mfgpt.c +++ b/drivers/misc/cs5535-mfgpt.c @@ -24,8 +24,11 @@ static int mfgpt_reset_timers; module_param_named(mfgptfix, mfgpt_reset_timers, int, 0644); -MODULE_PARM_DESC(mfgptfix, "Reset the MFGPT timers during init; " - "required by some broken BIOSes (ie, TinyBIOS < 0.99)."); +MODULE_PARM_DESC(mfgptfix, "Try to reset the MFGPT timers during init; " + "required by some broken BIOSes (ie, TinyBIOS < 0.99) or kexec " + "(1 = reset the MFGPT using an undocumented bit, " + "2 = perform a soft reset by unconfiguring all timers); + use what works best for you."); struct cs5535_mfgpt_timer { struct cs5535_mfgpt_chip *chip; @@ -255,6 +258,28 @@ static void reset_all_timers(void) wrmsr(MSR_MFGPT_SETUP, val, dummy); } +/* + * This is another sledgehammer to reset all MFGPT timers. + * Instead of using the undocumented bit method it clears + * IRQ, NMI and RESET settings. + */ +static void soft_reset(void) +{ + int i; + struct cs5535_mfgpt_timer t; + + for (i = 0; i < MFGPT_MAX_TIMERS; i++) { + t.nr = i; + + cs5535_mfgpt_toggle_event(&t, MFGPT_CMP1, MFGPT_EVENT_RESET, 0); + cs5535_mfgpt_toggle_event(&t, MFGPT_CMP2, MFGPT_EVENT_RESET, 0); + cs5535_mfgpt_toggle_event(&t, MFGPT_CMP1, MFGPT_EVENT_NMI, 0); + cs5535_mfgpt_toggle_event(&t, MFGPT_CMP2, MFGPT_EVENT_NMI, 0); + cs5535_mfgpt_toggle_event(&t, MFGPT_CMP1, MFGPT_EVENT_IRQ, 0); + cs5535_mfgpt_toggle_event(&t, MFGPT_CMP2, MFGPT_EVENT_IRQ, 0); + } +} + /* * Check whether any MFGPTs are available for the kernel to use. In most * cases, firmware that uses AMD's VSA code will claim all timers during @@ -271,15 +296,17 @@ static int scan_timers(struct cs5535_mfgpt_chip *mfgpt) int i; /* bios workaround */ - if (mfgpt_reset_timers) + if (mfgpt_reset_timers == 1) reset_all_timers(); + else if (mfgpt_reset_timers == 2) + soft_reset(); /* just to be safe, protect this section w/ lock */ spin_lock_irqsave(&mfgpt->lock, flags); for (i = 0; i < MFGPT_MAX_TIMERS; i++) { timer.nr = i; val = cs5535_mfgpt_read(&timer, MFGPT_REG_SETUP); - if (!(val & MFGPT_SETUP_SETUP)) { + if (!(val & MFGPT_SETUP_SETUP) || mfgpt_reset_timers == 2) { __set_bit(i, mfgpt->avail); timers++; } @@ -294,6 +321,12 @@ static int cs5535_mfgpt_probe(struct platform_device *pdev) struct resource *res; int err = -EIO, t; + if (mfgpt_reset_timers < 0 || mfgpt_reset_timers > 2) { + dev_err(&pdev->dev, "Bad mfgpt_reset_timers value: %i\n", + mfgpt_reset_timers); + goto done; + } + /* There are two ways to get the MFGPT base address; one is by * fetching it from MSR_LBAR_MFGPT, the other is by reading the * PCI BAR info. The latter method is easier (especially across -- cgit v1.2.3 From 288fa3e022eb85fa151e0f9bcd15caeb81679af6 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 29 Mar 2013 14:30:38 -0700 Subject: Drivers: hv: vmbus: Fix a bug in hv_need_to_signal() As part of updating the vmbus protocol, the function hv_need_to_signal() was introduced. This functions helps optimize signalling from guest to host. The newly added memory barrier is needed to ensure that we correctly decide when to signal the host. Signed-off-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang Reported-by: Olaf Hering Cc: Stable (V3.8+) Signed-off-by: Greg Kroah-Hartman --- drivers/hv/ring_buffer.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers') diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c index cafa72ffdc30..d6fbb5772b8d 100644 --- a/drivers/hv/ring_buffer.c +++ b/drivers/hv/ring_buffer.c @@ -71,6 +71,7 @@ u32 hv_end_read(struct hv_ring_buffer_info *rbi) static bool hv_need_to_signal(u32 old_write, struct hv_ring_buffer_info *rbi) { + smp_mb(); if (rbi->ring_buffer->interrupt_mask) return false; -- cgit v1.2.3 From 253b5374f08f3908cc380c5665470a5b7609be1c Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 11 Dec 2012 13:14:09 +0900 Subject: mfd: wm5102: Add registers for microphone detection level configuration Signed-off-by: Mark Brown --- drivers/mfd/wm5102-tables.c | 8 ++++++++ include/linux/mfd/arizona/registers.h | 4 ++++ 2 files changed, 12 insertions(+) (limited to 'drivers') diff --git a/drivers/mfd/wm5102-tables.c b/drivers/mfd/wm5102-tables.c index a433f580aa4c..ca2aed6bc830 100644 --- a/drivers/mfd/wm5102-tables.c +++ b/drivers/mfd/wm5102-tables.c @@ -331,6 +331,10 @@ static const struct reg_default wm5102_reg_default[] = { { 0x000002A3, 0x1102 }, /* R675 - Mic Detect 1 */ { 0x000002A4, 0x009F }, /* R676 - Mic Detect 2 */ { 0x000002A5, 0x0000 }, /* R677 - Mic Detect 3 */ + { 0x000002A6, 0x3737 }, /* R678 - Mic Detect Level 1 */ + { 0x000002A7, 0x372C }, /* R679 - Mic Detect Level 2 */ + { 0x000002A8, 0x1422 }, /* R680 - Mic Detect Level 3 */ + { 0x000002A9, 0x030A }, /* R681 - Mic Detect Level 4 */ { 0x000002C3, 0x0000 }, /* R707 - Mic noise mix control 1 */ { 0x000002CB, 0x0000 }, /* R715 - Isolation control */ { 0x000002D3, 0x0000 }, /* R723 - Jack detect analogue */ @@ -1090,6 +1094,10 @@ static bool wm5102_readable_register(struct device *dev, unsigned int reg) case ARIZONA_MIC_DETECT_1: case ARIZONA_MIC_DETECT_2: case ARIZONA_MIC_DETECT_3: + case ARIZONA_MIC_DETECT_LEVEL_1: + case ARIZONA_MIC_DETECT_LEVEL_2: + case ARIZONA_MIC_DETECT_LEVEL_3: + case ARIZONA_MIC_DETECT_LEVEL_4: case ARIZONA_MIC_NOISE_MIX_CONTROL_1: case ARIZONA_ISOLATION_CONTROL: case ARIZONA_JACK_DETECT_ANALOGUE: diff --git a/include/linux/mfd/arizona/registers.h b/include/linux/mfd/arizona/registers.h index 340355136069..f43aa7c8d040 100644 --- a/include/linux/mfd/arizona/registers.h +++ b/include/linux/mfd/arizona/registers.h @@ -124,6 +124,10 @@ #define ARIZONA_MIC_DETECT_1 0x2A3 #define ARIZONA_MIC_DETECT_2 0x2A4 #define ARIZONA_MIC_DETECT_3 0x2A5 +#define ARIZONA_MIC_DETECT_LEVEL_1 0x2A6 +#define ARIZONA_MIC_DETECT_LEVEL_2 0x2A7 +#define ARIZONA_MIC_DETECT_LEVEL_3 0x2A8 +#define ARIZONA_MIC_DETECT_LEVEL_4 0x2A9 #define ARIZONA_MIC_NOISE_MIX_CONTROL_1 0x2C3 #define ARIZONA_ISOLATION_CONTROL 0x2CB #define ARIZONA_JACK_DETECT_ANALOGUE 0x2D3 -- cgit v1.2.3 From 84eaa13616b6e7d001b7f7b909228087779b677b Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 25 Jan 2013 20:14:44 +0800 Subject: extcon: arizona: Attempt more microphone measurements In some pathological use cases users may insert an accessory very slowly causing multiple indeterminate measurements. Handle this by retrying many measurements before we give up and declare a headphone. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index b28927972128..4bb0e9ae405d 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -153,6 +153,8 @@ static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode) { struct arizona *arizona = info->arizona; + mode %= info->num_micd_modes; + if (arizona->pdata.micd_pol_gpio > 0) gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio, info->micd_modes[mode].gpio); @@ -783,7 +785,7 @@ static irqreturn_t arizona_micdet(int irq, void *data) * impedence then give up and report headphones. */ if (info->detecting && (val & 0x3f8)) { - if (info->jack_flips >= info->micd_num_modes) { + if (info->jack_flips >= info->micd_num_modes * 10) { dev_dbg(arizona->dev, "Detected HP/line\n"); arizona_identify_headphone(info); -- cgit v1.2.3 From 6fed4d869a11fdbb4c6a5e444dfb2c22f92c3e46 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 22:03:06 +0100 Subject: extcon: arizona: Allow configuration of button detection The Arizona button detection circuit is configurable, allowing the system integrator to program a range of thresholds for the buttons supported on the accessory but currently the driver uses the default button ranges and does not provide any flexibility in how this is exposed to the application layer. Provide platform data allowing the user to control this and to map the buttons to keys in the input subsystem. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 164 +++++++++++++++++++++++++++++--------- include/linux/mfd/arizona/pdata.h | 9 +++ 2 files changed, 134 insertions(+), 39 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index 4bb0e9ae405d..e2339629126a 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -33,7 +33,7 @@ #include #include -#define ARIZONA_NUM_BUTTONS 6 +#define ARIZONA_MAX_MICD_RANGE 8 #define ARIZONA_ACCDET_MODE_MIC 0 #define ARIZONA_ACCDET_MODE_HPL 1 @@ -50,6 +50,9 @@ struct arizona_extcon_info { const struct arizona_micd_config *micd_modes; int micd_num_modes; + const struct arizona_micd_range *micd_ranges; + int num_micd_ranges; + bool micd_reva; bool micd_clamp; @@ -71,20 +74,25 @@ struct arizona_extcon_info { }; static const struct arizona_micd_config micd_default_modes[] = { - { 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 }, { ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 }, + { 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 }, }; -static struct { - u16 status; - int report; -} arizona_lvl_to_key[ARIZONA_NUM_BUTTONS] = { - { 0x1, BTN_0 }, - { 0x2, BTN_1 }, - { 0x4, BTN_2 }, - { 0x8, BTN_3 }, - { 0x10, BTN_4 }, - { 0x20, BTN_5 }, +static const struct arizona_micd_range micd_default_ranges[] = { + { .max = 11, .key = BTN_0 }, + { .max = 28, .key = BTN_1 }, + { .max = 54, .key = BTN_2 }, + { .max = 100, .key = BTN_3 }, + { .max = 186, .key = BTN_4 }, + { .max = 430, .key = BTN_5 }, +}; + +static const int arizona_micd_levels[] = { + 3, 6, 8, 11, 13, 16, 18, 21, 23, 26, 28, 31, 34, 36, 39, 41, 44, 46, + 49, 52, 54, 57, 60, 62, 65, 67, 70, 73, 75, 78, 81, 83, 89, 94, 100, + 105, 111, 116, 122, 127, 139, 150, 161, 173, 186, 196, 209, 220, 245, + 270, 295, 321, 348, 375, 402, 430, 489, 550, 614, 681, 752, 903, 1071, + 1257, }; #define ARIZONA_CABLE_MECHANICAL 0 @@ -153,7 +161,7 @@ static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode) { struct arizona *arizona = info->arizona; - mode %= info->num_micd_modes; + mode %= info->micd_num_modes; if (arizona->pdata.micd_pol_gpio > 0) gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio, @@ -728,7 +736,7 @@ static irqreturn_t arizona_micdet(int irq, void *data) struct arizona_extcon_info *info = data; struct arizona *arizona = info->arizona; unsigned int val, lvl; - int ret, i; + int ret, i, key; mutex_lock(&info->lock); @@ -815,12 +823,13 @@ static irqreturn_t arizona_micdet(int irq, void *data) lvl = val & ARIZONA_MICD_LVL_MASK; lvl >>= ARIZONA_MICD_LVL_SHIFT; - for (i = 0; i < ARIZONA_NUM_BUTTONS; i++) - if (lvl & arizona_lvl_to_key[i].status) - input_report_key(info->input, - arizona_lvl_to_key[i].report, - 1); - input_sync(info->input); + WARN_ON(!lvl); + WARN_ON(ffs(lvl) - 1 >= info->num_micd_ranges); + if (lvl && ffs(lvl) - 1 < info->num_micd_ranges) { + key = info->micd_ranges[ffs(lvl) - 1].key; + input_report_key(info->input, key, 1); + input_sync(info->input); + } } else if (info->detecting) { dev_dbg(arizona->dev, "Headphone detected\n"); @@ -834,9 +843,9 @@ static irqreturn_t arizona_micdet(int irq, void *data) } } else { dev_dbg(arizona->dev, "Mic button released\n"); - for (i = 0; i < ARIZONA_NUM_BUTTONS; i++) + for (i = 0; i < info->num_micd_ranges; i++) input_report_key(info->input, - arizona_lvl_to_key[i].report, 0); + info->micd_ranges[i].key, 0); input_sync(info->input); arizona_extcon_pulse_micbias(info); } @@ -923,9 +932,9 @@ static irqreturn_t arizona_jackdet(int irq, void *data) info->mic = false; info->hpdet_done = false; - for (i = 0; i < ARIZONA_NUM_BUTTONS; i++) + for (i = 0; i < info->num_micd_ranges; i++) input_report_key(info->input, - arizona_lvl_to_key[i].report, 0); + info->micd_ranges[i].key, 0); input_sync(info->input); ret = extcon_update_state(&info->edev, 0xffffffff, 0); @@ -954,13 +963,33 @@ static irqreturn_t arizona_jackdet(int irq, void *data) return IRQ_HANDLED; } +/* Map a level onto a slot in the register bank */ +static void arizona_micd_set_level(struct arizona *arizona, int index, + unsigned int level) +{ + int reg; + unsigned int mask; + + reg = ARIZONA_MIC_DETECT_LEVEL_4 - (index / 2); + + if (!(index % 2)) { + mask = 0x3f00; + level <<= 8; + } else { + mask = 0x3f; + } + + /* Program the level itself */ + regmap_update_bits(arizona->regmap, reg, mask, level); +} + static int arizona_extcon_probe(struct platform_device *pdev) { struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); struct arizona_pdata *pdata; struct arizona_extcon_info *info; int jack_irq_fall, jack_irq_rise; - int ret, mode, i; + int ret, mode, i, j; if (!arizona->dapm || !arizona->dapm->card) return -EPROBE_DEFER; @@ -1013,6 +1042,17 @@ static int arizona_extcon_probe(struct platform_device *pdev) goto err; } + info->input = devm_input_allocate_device(&pdev->dev); + if (!info->input) { + dev_err(arizona->dev, "Can't allocate input dev\n"); + ret = -ENOMEM; + goto err_register; + } + + info->input->name = "Headset"; + info->input->phys = "arizona/extcon"; + info->input->dev.parent = &pdev->dev; + if (pdata->num_micd_configs) { info->micd_modes = pdata->micd_configs; info->micd_num_modes = pdata->num_micd_configs; @@ -1068,6 +1108,66 @@ static int arizona_extcon_probe(struct platform_device *pdev) arizona->pdata.micd_dbtime << ARIZONA_MICD_DBTIME_SHIFT); + BUILD_BUG_ON(ARRAY_SIZE(arizona_micd_levels) != 0x40); + + if (arizona->pdata.num_micd_ranges) { + info->micd_ranges = pdata->micd_ranges; + info->num_micd_ranges = pdata->num_micd_ranges; + } else { + info->micd_ranges = micd_default_ranges; + info->num_micd_ranges = ARRAY_SIZE(micd_default_ranges); + } + + if (arizona->pdata.num_micd_ranges > ARIZONA_MAX_MICD_RANGE) { + dev_err(arizona->dev, "Too many MICD ranges: %d\n", + arizona->pdata.num_micd_ranges); + } + + if (info->num_micd_ranges > 1) { + for (i = 1; i < info->num_micd_ranges; i++) { + if (info->micd_ranges[i - 1].max > + info->micd_ranges[i].max) { + dev_err(arizona->dev, + "MICD ranges must be sorted\n"); + ret = -EINVAL; + goto err_input; + } + } + } + + /* Disable all buttons by default */ + regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_2, + ARIZONA_MICD_LVL_SEL_MASK, 0x81); + + /* Set up all the buttons the user specified */ + for (i = 0; i < info->num_micd_ranges; i++) { + for (j = 0; j < ARRAY_SIZE(arizona_micd_levels); j++) + if (arizona_micd_levels[j] >= info->micd_ranges[i].max) + break; + + if (j == ARRAY_SIZE(arizona_micd_levels)) { + dev_err(arizona->dev, "Unsupported MICD level %d\n", + info->micd_ranges[i].max); + ret = -EINVAL; + goto err_input; + } + + dev_dbg(arizona->dev, "%d ohms for MICD threshold %d\n", + arizona_micd_levels[j], i); + + arizona_micd_set_level(arizona, i, j); + input_set_capability(info->input, EV_KEY, + info->micd_ranges[i].key); + + /* Enable reporting of that range */ + regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_2, + 1 << i, 1 << i); + } + + /* Set all the remaining keys to a maximum */ + for (; i < ARIZONA_MAX_MICD_RANGE; i++) + arizona_micd_set_level(arizona, i, 0x3f); + /* * If we have a clamp use it, activating in conjunction with * GPIO5 if that is connected for jack detect operation. @@ -1095,20 +1195,6 @@ static int arizona_extcon_probe(struct platform_device *pdev) arizona_extcon_set_mode(info, 0); - info->input = devm_input_allocate_device(&pdev->dev); - if (!info->input) { - dev_err(arizona->dev, "Can't allocate input dev\n"); - ret = -ENOMEM; - goto err_register; - } - - for (i = 0; i < ARIZONA_NUM_BUTTONS; i++) - input_set_capability(info->input, EV_KEY, - arizona_lvl_to_key[i].report); - info->input->name = "Headset"; - info->input->phys = "arizona/extcon"; - info->input->dev.parent = &pdev->dev; - pm_runtime_enable(&pdev->dev); pm_runtime_idle(&pdev->dev); pm_runtime_get_sync(&pdev->dev); diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h index 455c51d22d6b..eb11a8ac6db2 100644 --- a/include/linux/mfd/arizona/pdata.h +++ b/include/linux/mfd/arizona/pdata.h @@ -86,6 +86,11 @@ struct arizona_micd_config { bool gpio; }; +struct arizona_micd_range { + int max; /** Ohms */ + int key; /** Key to report to input layer */ +}; + struct arizona_pdata { int reset; /** GPIO controlling /RESET, if any */ int ldoena; /** GPIO controlling LODENA, if any */ @@ -138,6 +143,10 @@ struct arizona_pdata { /** Force MICBIAS on for mic detect */ bool micd_force_micbias; + /** Mic detect level parameters */ + const struct arizona_micd_range *micd_ranges; + int num_micd_ranges; + /** Headset polarity configurations */ struct arizona_micd_config *micd_configs; int num_micd_configs; -- cgit v1.2.3 From 77ff4f95d77ddb14fe827e70d8b4be4a692790e9 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:02:37 +0100 Subject: extcon: arizona: Don't pulse MICBIAS for HPDET identification There is no need to do this as HPDET identification will cause MICBIAS to be powered down again. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index e2339629126a..95748d3cbc4e 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -693,8 +693,6 @@ static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info) info->hpdet_active = true; - arizona_extcon_pulse_micbias(info); - arizona_extcon_do_magic(info, 0x4000); ret = regmap_update_bits(arizona->regmap, -- cgit v1.2.3 From e56a0a572be150c79cdbf62ff98f4a63419e1c0b Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:03:52 +0100 Subject: extcon: arizona: Allow pull to be disabled on GPIO5 when used for JACKET In some designs an external pull won't be needed. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 9 +++++++-- include/linux/mfd/arizona/pdata.h | 3 +++ 2 files changed, 10 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index 95748d3cbc4e..132bc99fdc06 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -986,6 +986,7 @@ static int arizona_extcon_probe(struct platform_device *pdev) struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); struct arizona_pdata *pdata; struct arizona_extcon_info *info; + unsigned int val; int jack_irq_fall, jack_irq_rise; int ret, mode, i, j; @@ -1172,9 +1173,13 @@ static int arizona_extcon_probe(struct platform_device *pdev) */ if (info->micd_clamp) { if (arizona->pdata.jd_gpio5) { - /* Put the GPIO into input mode */ + /* Put the GPIO into input mode with optional pull */ + val = 0xc101; + if (arizona->pdata.jd_gpio5_nopull) + val &= ~ARIZONA_GPN_PU; + regmap_write(arizona->regmap, ARIZONA_GPIO5_CTRL, - 0xc101); + val); regmap_update_bits(arizona->regmap, ARIZONA_MICD_CLAMP_CONTROL, diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h index eb11a8ac6db2..008b8c40549f 100644 --- a/include/linux/mfd/arizona/pdata.h +++ b/include/linux/mfd/arizona/pdata.h @@ -122,6 +122,9 @@ struct arizona_pdata { /** GPIO5 is used for jack detection */ bool jd_gpio5; + /** Internal pull on GPIO5 is disabled when used for jack detection */ + bool jd_gpio5_nopull; + /** Use the headphone detect circuit to identify the accessory */ bool hpdet_acc_id; -- cgit v1.2.3 From 82e2e0fd3fcf2aec9d5796e31d7f29c738331f6b Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:04:43 +0100 Subject: extcon: arizona: Raise minimum microphone impedance for HPDET method Ensure greater reliability by increasing the minimum threashold for identifying a microphone. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index 132bc99fdc06..2f0bd4938fcc 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -519,7 +519,7 @@ static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading) * measure the mic as high impedance. */ if ((info->hpdet_res[0] > info->hpdet_res[1] * 2) || - (id_gpio && info->hpdet_res[2] > 10)) { + (id_gpio && info->hpdet_res[2] > 1257)) { dev_dbg(arizona->dev, "Detected mic\n"); info->mic = true; info->detecting = true; -- cgit v1.2.3 From a3e2078d6a14bc67e733f7dbd32d1bc4051c9d90 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:05:27 +0100 Subject: extcon: arizona: Suppress duplicate JACKDET reports In cases where we see a brief (dis)connection of the jack detection signals we may see a noop jack insertion or removal where the jack has returned to the original state by the time the interrupt is serviced. Suppress these events in order to save work and avoid confusing the rest of the code. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index 2f0bd4938fcc..9e4bffe610b6 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -39,6 +39,8 @@ #define ARIZONA_ACCDET_MODE_HPL 1 #define ARIZONA_ACCDET_MODE_HPR 2 +#define HPDET_DEBOUNCE 250 + struct arizona_extcon_info { struct device *dev; struct arizona *arizona; @@ -46,6 +48,8 @@ struct arizona_extcon_info { struct regulator *micvdd; struct input_dev *input; + u16 last_jackdet; + int micd_mode; const struct arizona_micd_config *micd_modes; int micd_num_modes; @@ -871,11 +875,12 @@ static irqreturn_t arizona_jackdet(int irq, void *data) struct arizona_extcon_info *info = data; struct arizona *arizona = info->arizona; unsigned int val, present, mask; + bool cancelled; int ret, i; - pm_runtime_get_sync(info->dev); + cancelled = cancel_delayed_work_sync(&info->hpdet_work); - cancel_delayed_work_sync(&info->hpdet_work); + pm_runtime_get_sync(info->dev); mutex_lock(&info->lock); @@ -896,7 +901,18 @@ static irqreturn_t arizona_jackdet(int irq, void *data) return IRQ_NONE; } - if ((val & mask) == present) { + val &= mask; + if (val == info->last_jackdet) { + dev_dbg(arizona->dev, "Suppressing duplicate JACKDET\n"); + if (cancelled) + schedule_delayed_work(&info->hpdet_work, + msecs_to_jiffies(HPDET_DEBOUNCE)); + + goto out; + } + info->last_jackdet = val; + + if (info->last_jackdet == present) { dev_dbg(arizona->dev, "Detected jack\n"); ret = extcon_set_cable_state_(&info->edev, ARIZONA_CABLE_MECHANICAL, true); @@ -913,7 +929,7 @@ static irqreturn_t arizona_jackdet(int irq, void *data) arizona_start_mic(info); } else { schedule_delayed_work(&info->hpdet_work, - msecs_to_jiffies(250)); + msecs_to_jiffies(HPDET_DEBOUNCE)); } regmap_update_bits(arizona->regmap, @@ -953,6 +969,7 @@ static irqreturn_t arizona_jackdet(int irq, void *data) ARIZONA_JD1_FALL_TRIG_STS | ARIZONA_JD1_RISE_TRIG_STS); +out: mutex_unlock(&info->lock); pm_runtime_mark_last_busy(info->dev); @@ -1012,6 +1029,7 @@ static int arizona_extcon_probe(struct platform_device *pdev) mutex_init(&info->lock); info->arizona = arizona; info->dev = &pdev->dev; + info->last_jackdet = ~(ARIZONA_MICD_CLAMP_STS | ARIZONA_JD1_STS); INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work); platform_set_drvdata(pdev, info); -- cgit v1.2.3 From e2c0f476ec90dbb020b1da7e399072e062ad6c9e Mon Sep 17 00:00:00 2001 From: Charles Keepax Date: Mon, 1 Apr 2013 19:06:29 +0100 Subject: extcon: arizona: Check we report a valid impedance Occasionally we can trigger an interrupt before we have completed impedance measurement, although the valid bit will still be set. This patch spins reading the impedance value until a valid value is seen. Signed-off-by: Charles Keepax Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index 9e4bffe610b6..4022fe207926 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -737,22 +737,30 @@ static irqreturn_t arizona_micdet(int irq, void *data) { struct arizona_extcon_info *info = data; struct arizona *arizona = info->arizona; - unsigned int val, lvl; + unsigned int val = 0, lvl; int ret, i, key; mutex_lock(&info->lock); - ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val); - if (ret != 0) { - dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret); - mutex_unlock(&info->lock); - return IRQ_NONE; - } + for (i = 0; i < 10 && !(val & 0x7fc); i++) { + ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val); + if (ret != 0) { + dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret); + mutex_unlock(&info->lock); + return IRQ_NONE; + } + + dev_dbg(arizona->dev, "MICDET: %x\n", val); - dev_dbg(arizona->dev, "MICDET: %x\n", val); + if (!(val & ARIZONA_MICD_VALID)) { + dev_warn(arizona->dev, "Microphone detection state invalid\n"); + mutex_unlock(&info->lock); + return IRQ_NONE; + } + } - if (!(val & ARIZONA_MICD_VALID)) { - dev_warn(arizona->dev, "Microphone detection state invalid\n"); + if (i == 10 && !(val & 0x7fc)) { + dev_err(arizona->dev, "Failed to get valid MICDET value\n"); mutex_unlock(&info->lock); return IRQ_NONE; } -- cgit v1.2.3 From 2643fd641af28603ccd42244011a5ebc66016f8f Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:07:28 +0100 Subject: extcon: arizona: Tune up HPDET debounce Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index 4022fe207926..5344f435f689 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -39,7 +39,7 @@ #define ARIZONA_ACCDET_MODE_HPL 1 #define ARIZONA_ACCDET_MODE_HPR 2 -#define HPDET_DEBOUNCE 250 +#define HPDET_DEBOUNCE 500 struct arizona_extcon_info { struct device *dev; -- cgit v1.2.3 From 9dd5e53d9d2f933039eb2d5e4052afa249f638ba Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:09:45 +0100 Subject: extcon: arizona: Retry HPDET identification for high impedance Sometimes we can trigger measurements early if contacts are shorted during a slow insertion. As well as debouncing add further robustness by retrying if we get a high impedance measurement for headphones as this can indicate that the headphones were not yet connected. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index 5344f435f689..c18cf14067c6 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -39,6 +39,8 @@ #define ARIZONA_ACCDET_MODE_HPL 1 #define ARIZONA_ACCDET_MODE_HPR 2 +#define ARIZONA_HPDET_MAX 10000 + #define HPDET_DEBOUNCE 500 struct arizona_extcon_info { @@ -64,6 +66,7 @@ struct arizona_extcon_info { bool hpdet_active; bool hpdet_done; + bool hpdet_retried; int num_hpdet_res; unsigned int hpdet_res[3]; @@ -112,6 +115,8 @@ static const char *arizona_cable[] = { NULL, }; +static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info); + static void arizona_extcon_do_magic(struct arizona_extcon_info *info, unsigned int magic) { @@ -393,7 +398,7 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info) /* If we go out of range report top of range */ if (val < 100 || val > 0x3fb) { dev_dbg(arizona->dev, "Measurement out of range\n"); - return 10000; + return ARIZONA_HPDET_MAX; } dev_dbg(arizona->dev, "HPDET read %d in range %d\n", @@ -518,6 +523,16 @@ static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading) /* Take the headphone impedance for the main report */ *reading = info->hpdet_res[0]; + /* Sometimes we get false readings due to slow insert */ + if (*reading >= ARIZONA_HPDET_MAX && !info->hpdet_retried) { + dev_dbg(arizona->dev, "Retrying high impedance\n"); + info->num_hpdet_res = 0; + info->hpdet_retried = true; + arizona_start_hpdet_acc_id(info); + pm_runtime_put(info->dev); + return -EAGAIN; + } + /* * Either the two grounds measure differently or we * measure the mic as high impedance. @@ -953,6 +968,7 @@ static irqreturn_t arizona_jackdet(int irq, void *data) info->hpdet_res[i] = 0; info->mic = false; info->hpdet_done = false; + info->hpdet_retried = false; for (i = 0; i < info->num_micd_ranges; i++) input_report_key(info->input, -- cgit v1.2.3 From db924ff5c7297cca85eb0faa79ea29e988f96420 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:10:28 +0100 Subject: extcon: arizona: Don't ground flip when using HPDET identification This extra check makes the procedure take longer and is of marginal use in identification so do not execute it. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 24 +----------------------- 1 file changed, 1 insertion(+), 23 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index c18cf14067c6..7c4ce812d735 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -470,29 +470,7 @@ static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading) */ if (arizona->pdata.hpdet_acc_id) { info->hpdet_res[info->num_hpdet_res++] = *reading; - - /* - * If the impedence is too high don't measure the - * second ground. - */ - if (info->num_hpdet_res == 1 && *reading >= 45) { - dev_dbg(arizona->dev, "Skipping ground flip\n"); - info->hpdet_res[info->num_hpdet_res++] = *reading; - } - - if (info->num_hpdet_res == 1) { - dev_dbg(arizona->dev, "Flipping ground\n"); - - regmap_update_bits(arizona->regmap, - ARIZONA_ACCESSORY_DETECT_MODE_1, - ARIZONA_ACCDET_SRC, - ~info->micd_modes[0].src); - - regmap_update_bits(arizona->regmap, - ARIZONA_HEADPHONE_DETECT_1, - ARIZONA_HP_POLL, ARIZONA_HP_POLL); - return -EAGAIN; - } + info->hpdet_res[info->num_hpdet_res++] = *reading; /* Only check the mic directly if we didn't already ID it */ if (id_gpio && info->num_hpdet_res == 2 && -- cgit v1.2.3 From 9c2ba270eaa227c999af451e1c2c9bf0d24aa8e5 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 25 Feb 2013 23:42:31 +0000 Subject: extcon: arizona: Simplify HPDET based identification Rather than measuring both HP channels we can simply directly measure the microphone impedance and then rely on MICDET for final confirmation of the presence of a suitable microphone. This improves the overall performance of the identification process. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 46 +++++++++++++++++++++------------------ include/linux/mfd/arizona/pdata.h | 3 +++ 2 files changed, 28 insertions(+), 21 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index 7c4ce812d735..a83ca27aa99f 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -459,7 +459,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info) return val; } -static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading) +static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading, + bool *mic) { struct arizona *arizona = info->arizona; int id_gpio = arizona->pdata.hpdet_id_gpio; @@ -470,11 +471,9 @@ static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading) */ if (arizona->pdata.hpdet_acc_id) { info->hpdet_res[info->num_hpdet_res++] = *reading; - info->hpdet_res[info->num_hpdet_res++] = *reading; /* Only check the mic directly if we didn't already ID it */ - if (id_gpio && info->num_hpdet_res == 2 && - !((info->hpdet_res[0] > info->hpdet_res[1] * 2))) { + if (id_gpio && info->num_hpdet_res == 1) { dev_dbg(arizona->dev, "Measuring mic\n"); regmap_update_bits(arizona->regmap, @@ -493,10 +492,8 @@ static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading) } /* OK, got both. Now, compare... */ - dev_dbg(arizona->dev, "HPDET measured %d %d %d\n", - info->hpdet_res[0], info->hpdet_res[1], - info->hpdet_res[2]); - + dev_dbg(arizona->dev, "HPDET measured %d %d\n", + info->hpdet_res[0], info->hpdet_res[1]); /* Take the headphone impedance for the main report */ *reading = info->hpdet_res[0]; @@ -512,13 +509,11 @@ static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading) } /* - * Either the two grounds measure differently or we - * measure the mic as high impedance. + * If we measure the mic as */ - if ((info->hpdet_res[0] > info->hpdet_res[1] * 2) || - (id_gpio && info->hpdet_res[2] > 1257)) { + if (!id_gpio || info->hpdet_res[1] > 50) { dev_dbg(arizona->dev, "Detected mic\n"); - info->mic = true; + *mic = true; info->detecting = true; } else { dev_dbg(arizona->dev, "Detected headphone\n"); @@ -541,6 +536,7 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data) int id_gpio = arizona->pdata.hpdet_id_gpio; int report = ARIZONA_CABLE_HEADPHONE; int ret, reading; + bool mic = false; mutex_lock(&info->lock); @@ -576,7 +572,7 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data) ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL, 0); - ret = arizona_hpdet_do_id(info, &reading); + ret = arizona_hpdet_do_id(info, &reading, &mic); if (ret == -EAGAIN) { goto out; } else if (ret < 0) { @@ -606,7 +602,7 @@ done: ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC); /* If we have a mic then reenable MICDET */ - if (info->mic) + if (mic || info->mic) arizona_start_mic(info); if (info->hpdet_active) { @@ -681,6 +677,8 @@ err: static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info) { struct arizona *arizona = info->arizona; + int hp_reading = 32; + bool mic; int ret; dev_dbg(arizona->dev, "Starting identification via HPDET\n"); @@ -702,12 +700,18 @@ static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info) goto err; } - ret = regmap_update_bits(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1, - ARIZONA_HP_POLL, ARIZONA_HP_POLL); - if (ret != 0) { - dev_err(arizona->dev, "Can't start HPDETL measurement: %d\n", - ret); - goto err; + if (arizona->pdata.hpdet_acc_id_line) { + ret = regmap_update_bits(arizona->regmap, + ARIZONA_HEADPHONE_DETECT_1, + ARIZONA_HP_POLL, ARIZONA_HP_POLL); + if (ret != 0) { + dev_err(arizona->dev, + "Can't start HPDETL measurement: %d\n", + ret); + goto err; + } + } else { + arizona_hpdet_do_id(info, &hp_reading, &mic); } return; diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h index 008b8c40549f..45c84777c624 100644 --- a/include/linux/mfd/arizona/pdata.h +++ b/include/linux/mfd/arizona/pdata.h @@ -128,6 +128,9 @@ struct arizona_pdata { /** Use the headphone detect circuit to identify the accessory */ bool hpdet_acc_id; + /** Check for line output with HPDET method */ + bool hpdet_acc_id_line; + /** GPIO used for mic isolation with HPDET */ int hpdet_id_gpio; -- cgit v1.2.3 From 939c5671d11d86ae783f416b703c705647ac563b Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:17:34 +0100 Subject: extcon: arizona: Time out if MICDET fails to report In pathological cases the microphone detection may fail to report, for example due to a failure to get a stable measurement. Provide a timeout to cover such cases. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 38 +++++++++++++++++++++++++++++++++++--- 1 file changed, 35 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index a83ca27aa99f..e2d881a58ca6 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -42,6 +42,7 @@ #define ARIZONA_HPDET_MAX 10000 #define HPDET_DEBOUNCE 500 +#define MICD_TIMEOUT 2000 struct arizona_extcon_info { struct device *dev; @@ -63,6 +64,7 @@ struct arizona_extcon_info { bool micd_clamp; struct delayed_work hpdet_work; + struct delayed_work micd_timeout_work; bool hpdet_active; bool hpdet_done; @@ -730,6 +732,24 @@ err: info->hpdet_active = false; } +static void arizona_micd_timeout_work(struct work_struct *work) +{ + struct arizona_extcon_info *info = container_of(work, + struct arizona_extcon_info, + micd_timeout_work.work); + + mutex_lock(&info->lock); + + dev_dbg(info->arizona->dev, "MICD timed out, reporting HP\n"); + arizona_identify_headphone(info); + + info->detecting = false; + + arizona_stop_mic(info); + + mutex_unlock(&info->lock); +} + static irqreturn_t arizona_micdet(int irq, void *data) { struct arizona_extcon_info *info = data; @@ -737,6 +757,8 @@ static irqreturn_t arizona_micdet(int irq, void *data) unsigned int val = 0, lvl; int ret, i, key; + cancel_delayed_work_sync(&info->micd_timeout_work); + mutex_lock(&info->lock); for (i = 0; i < 10 && !(val & 0x7fc); i++) { @@ -858,6 +880,10 @@ static irqreturn_t arizona_micdet(int irq, void *data) } handled: + if (info->detecting) + schedule_delayed_work(&info->micd_timeout_work, + msecs_to_jiffies(MICD_TIMEOUT)); + pm_runtime_mark_last_busy(info->dev); mutex_unlock(&info->lock); @@ -880,10 +906,11 @@ static irqreturn_t arizona_jackdet(int irq, void *data) struct arizona_extcon_info *info = data; struct arizona *arizona = info->arizona; unsigned int val, present, mask; - bool cancelled; + bool cancelled_hp, cancelled_mic; int ret, i; - cancelled = cancel_delayed_work_sync(&info->hpdet_work); + cancelled_hp = cancel_delayed_work_sync(&info->hpdet_work); + cancelled_mic = cancel_delayed_work_sync(&info->micd_timeout_work); pm_runtime_get_sync(info->dev); @@ -909,10 +936,14 @@ static irqreturn_t arizona_jackdet(int irq, void *data) val &= mask; if (val == info->last_jackdet) { dev_dbg(arizona->dev, "Suppressing duplicate JACKDET\n"); - if (cancelled) + if (cancelled_hp) schedule_delayed_work(&info->hpdet_work, msecs_to_jiffies(HPDET_DEBOUNCE)); + if (cancelled_mic) + schedule_delayed_work(&info->micd_timeout_work, + msecs_to_jiffies(MICD_TIMEOUT)); + goto out; } info->last_jackdet = val; @@ -1037,6 +1068,7 @@ static int arizona_extcon_probe(struct platform_device *pdev) info->dev = &pdev->dev; info->last_jackdet = ~(ARIZONA_MICD_CLAMP_STS | ARIZONA_JD1_STS); INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work); + INIT_DELAYED_WORK(&info->micd_timeout_work, arizona_micd_timeout_work); platform_set_drvdata(pdev, info); switch (arizona->type) { -- cgit v1.2.3 From 41a57850b5e5c450da351465efcc41383def7f8a Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:18:18 +0100 Subject: extcon: arizona: Clear existing button reports before reporting new one If the user moves directly from one button to another then we won't get a no buttons pressed event and will therefore end up reporting that two buttons are simultaneously pressed which isn't supported by the hardware. Make sure we clear any existing button reports before reporting any new ones. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index e2d881a58ca6..26f9a1ae15c4 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -852,6 +852,10 @@ static irqreturn_t arizona_micdet(int irq, void *data) lvl = val & ARIZONA_MICD_LVL_MASK; lvl >>= ARIZONA_MICD_LVL_SHIFT; + for (i = 0; i < info->num_micd_ranges; i++) + input_report_key(info->input, + info->micd_ranges[i].key, 0); + WARN_ON(!lvl); WARN_ON(ffs(lvl) - 1 >= info->num_micd_ranges); if (lvl && ffs(lvl) - 1 < info->num_micd_ranges) { -- cgit v1.2.3 From cd59e79656f4e7137909166248a935d422b1245a Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:21:48 +0100 Subject: extcon: arizona: Allow additional debounce during microphone detection Help mitigate against mechanical bounce during the initial detection by allowing the configuration of an additional debounce on top of that the hardware does during the initial phase of microphone detection operation. Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 35 ++++++++++++++++++++++++++++++----- include/linux/mfd/arizona/pdata.h | 3 +++ 2 files changed, 33 insertions(+), 5 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index 26f9a1ae15c4..c7f8eb4299d2 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -64,6 +64,7 @@ struct arizona_extcon_info { bool micd_clamp; struct delayed_work hpdet_work; + struct delayed_work micd_detect_work; struct delayed_work micd_timeout_work; bool hpdet_active; @@ -750,9 +751,11 @@ static void arizona_micd_timeout_work(struct work_struct *work) mutex_unlock(&info->lock); } -static irqreturn_t arizona_micdet(int irq, void *data) +static void arizona_micd_detect(struct work_struct *work) { - struct arizona_extcon_info *info = data; + struct arizona_extcon_info *info = container_of(work, + struct arizona_extcon_info, + micd_detect_work.work); struct arizona *arizona = info->arizona; unsigned int val = 0, lvl; int ret, i, key; @@ -766,7 +769,7 @@ static irqreturn_t arizona_micdet(int irq, void *data) if (ret != 0) { dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret); mutex_unlock(&info->lock); - return IRQ_NONE; + return; } dev_dbg(arizona->dev, "MICDET: %x\n", val); @@ -774,14 +777,14 @@ static irqreturn_t arizona_micdet(int irq, void *data) if (!(val & ARIZONA_MICD_VALID)) { dev_warn(arizona->dev, "Microphone detection state invalid\n"); mutex_unlock(&info->lock); - return IRQ_NONE; + return; } } if (i == 10 && !(val & 0x7fc)) { dev_err(arizona->dev, "Failed to get valid MICDET value\n"); mutex_unlock(&info->lock); - return IRQ_NONE; + return; } /* Due to jack detect this should never happen */ @@ -890,6 +893,27 @@ handled: pm_runtime_mark_last_busy(info->dev); mutex_unlock(&info->lock); +} + +static irqreturn_t arizona_micdet(int irq, void *data) +{ + struct arizona_extcon_info *info = data; + struct arizona *arizona = info->arizona; + int debounce = arizona->pdata.micd_detect_debounce; + + cancel_delayed_work_sync(&info->micd_detect_work); + cancel_delayed_work_sync(&info->micd_timeout_work); + + mutex_lock(&info->lock); + if (!info->detecting) + debounce = 0; + mutex_unlock(&info->lock); + + if (debounce) + schedule_delayed_work(&info->micd_detect_work, + msecs_to_jiffies(debounce)); + else + arizona_micd_detect(&info->micd_detect_work.work); return IRQ_HANDLED; } @@ -1072,6 +1096,7 @@ static int arizona_extcon_probe(struct platform_device *pdev) info->dev = &pdev->dev; info->last_jackdet = ~(ARIZONA_MICD_CLAMP_STS | ARIZONA_JD1_STS); INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work); + INIT_DELAYED_WORK(&info->micd_detect_work, arizona_micd_detect); INIT_DELAYED_WORK(&info->micd_timeout_work, arizona_micd_timeout_work); platform_set_drvdata(pdev, info); diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h index 45c84777c624..3ef300baa2e6 100644 --- a/include/linux/mfd/arizona/pdata.h +++ b/include/linux/mfd/arizona/pdata.h @@ -134,6 +134,9 @@ struct arizona_pdata { /** GPIO used for mic isolation with HPDET */ int hpdet_id_gpio; + /** Extra debounce timeout used during initial mic detection (ms) */ + int micd_detect_debounce; + /** GPIO for mic detection polarity */ int micd_pol_gpio; -- cgit v1.2.3 From 7abd4e2a8f1c3e534da44c35e2d3d6353573e51f Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 1 Apr 2013 19:25:55 +0100 Subject: extcon: arizona: Make mic detection timeout configurable Signed-off-by: Mark Brown --- drivers/extcon/extcon-arizona.c | 13 ++++++++++--- include/linux/mfd/arizona/pdata.h | 3 +++ 2 files changed, 13 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index c7f8eb4299d2..7a1b4a7791ba 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -42,7 +42,7 @@ #define ARIZONA_HPDET_MAX 10000 #define HPDET_DEBOUNCE 500 -#define MICD_TIMEOUT 2000 +#define DEFAULT_MICD_TIMEOUT 2000 struct arizona_extcon_info { struct device *dev; @@ -60,6 +60,8 @@ struct arizona_extcon_info { const struct arizona_micd_range *micd_ranges; int num_micd_ranges; + int micd_timeout; + bool micd_reva; bool micd_clamp; @@ -889,7 +891,7 @@ static void arizona_micd_detect(struct work_struct *work) handled: if (info->detecting) schedule_delayed_work(&info->micd_timeout_work, - msecs_to_jiffies(MICD_TIMEOUT)); + msecs_to_jiffies(info->micd_timeout)); pm_runtime_mark_last_busy(info->dev); mutex_unlock(&info->lock); @@ -970,7 +972,7 @@ static irqreturn_t arizona_jackdet(int irq, void *data) if (cancelled_mic) schedule_delayed_work(&info->micd_timeout_work, - msecs_to_jiffies(MICD_TIMEOUT)); + msecs_to_jiffies(info->micd_timeout)); goto out; } @@ -1027,6 +1029,11 @@ static irqreturn_t arizona_jackdet(int irq, void *data) ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB); } + if (arizona->pdata.micd_timeout) + info->micd_timeout = arizona->pdata.micd_timeout; + else + info->micd_timeout = DEFAULT_MICD_TIMEOUT; + /* Clear trig_sts to make sure DCVDD is not forced up */ regmap_write(arizona->regmap, ARIZONA_AOD_WKUP_AND_TRIG, ARIZONA_MICD_CLAMP_FALL_TRIG_STS | diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h index 3ef300baa2e6..a0f940987a3e 100644 --- a/include/linux/mfd/arizona/pdata.h +++ b/include/linux/mfd/arizona/pdata.h @@ -149,6 +149,9 @@ struct arizona_pdata { /** Mic detect debounce level */ int micd_dbtime; + /** Mic detect timeout (ms) */ + int micd_timeout; + /** Force MICBIAS on for mic detect */ bool micd_force_micbias; -- cgit v1.2.3 From 33facb4d69cd60895073ed0a018a524a8e2a01ba Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Tue, 2 Apr 2013 09:37:09 +0200 Subject: cs5535-mfgpt: Fix quotation marks Commit "cs5535-mfgpt: Add another reset method" introduced an unterminated string and broke the build. Reported-by: Stephen Rothwell Reported-by: kbuild test robot Signed-off-by: Richard Weinberger Signed-off-by: Greg Kroah-Hartman --- drivers/misc/cs5535-mfgpt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/cs5535-mfgpt.c b/drivers/misc/cs5535-mfgpt.c index 6bdb3baf7bcf..effd8c6b2b94 100644 --- a/drivers/misc/cs5535-mfgpt.c +++ b/drivers/misc/cs5535-mfgpt.c @@ -27,8 +27,8 @@ module_param_named(mfgptfix, mfgpt_reset_timers, int, 0644); MODULE_PARM_DESC(mfgptfix, "Try to reset the MFGPT timers during init; " "required by some broken BIOSes (ie, TinyBIOS < 0.99) or kexec " "(1 = reset the MFGPT using an undocumented bit, " - "2 = perform a soft reset by unconfiguring all timers); - use what works best for you."); + "2 = perform a soft reset by unconfiguring all timers); " + "use what works best for you."); struct cs5535_mfgpt_timer { struct cs5535_mfgpt_chip *chip; -- cgit v1.2.3 From 41ddcf67b864343690bffd8029a882377c3ff50b Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Fri, 5 Apr 2013 10:55:35 +0900 Subject: misc: at25: use spi_get_drvdata() and spi_set_drvdata() Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han Signed-off-by: Greg Kroah-Hartman --- drivers/misc/eeprom/at25.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/eeprom/at25.c b/drivers/misc/eeprom/at25.c index b08cf8a08789..ad8fd8e64937 100644 --- a/drivers/misc/eeprom/at25.c +++ b/drivers/misc/eeprom/at25.c @@ -412,7 +412,7 @@ static int at25_probe(struct spi_device *spi) mutex_init(&at25->lock); at25->chip = chip; at25->spi = spi_dev_get(spi); - dev_set_drvdata(&spi->dev, at25); + spi_set_drvdata(spi, at25); at25->addrlen = addrlen; /* Export the EEPROM bytes through sysfs, since that's convenient. @@ -463,7 +463,7 @@ static int at25_remove(struct spi_device *spi) { struct at25_data *at25; - at25 = dev_get_drvdata(&spi->dev); + at25 = spi_get_drvdata(spi); sysfs_remove_bin_file(&spi->dev.kobj, &at25->bin); kfree(at25); return 0; -- cgit v1.2.3 From 5ba75b559a5cb84b2429aa827a8a95fa50cab99a Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Fri, 5 Apr 2013 10:56:04 +0900 Subject: misc: eeprom_93xx46: use spi_get_drvdata() and spi_set_drvdata() Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han Signed-off-by: Greg Kroah-Hartman --- drivers/misc/eeprom/eeprom_93xx46.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c index a6b5d5e73485..94cfc1212577 100644 --- a/drivers/misc/eeprom/eeprom_93xx46.c +++ b/drivers/misc/eeprom/eeprom_93xx46.c @@ -363,7 +363,7 @@ static int eeprom_93xx46_probe(struct spi_device *spi) dev_err(&spi->dev, "can't create erase interface\n"); } - dev_set_drvdata(&spi->dev, edev); + spi_set_drvdata(spi, edev); return 0; fail: kfree(edev); @@ -372,13 +372,13 @@ fail: static int eeprom_93xx46_remove(struct spi_device *spi) { - struct eeprom_93xx46_dev *edev = dev_get_drvdata(&spi->dev); + struct eeprom_93xx46_dev *edev = spi_get_drvdata(spi); if (!(edev->pdata->flags & EE_READONLY)) device_remove_file(&spi->dev, &dev_attr_erase); sysfs_remove_bin_file(&spi->dev.kobj, &edev->bin); - dev_set_drvdata(&spi->dev, NULL); + spi_set_drvdata(spi, NULL); kfree(edev); return 0; } -- cgit v1.2.3 From a864ec76db575b158427ec7fa624cd30ede5e038 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Fri, 5 Apr 2013 10:56:22 +0900 Subject: misc: lattice-ecp3-config: use spi_get_drvdata() Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han Signed-off-by: Greg Kroah-Hartman --- drivers/misc/lattice-ecp3-config.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/misc/lattice-ecp3-config.c b/drivers/misc/lattice-ecp3-config.c index 155700bfd2b6..bb26f086bd8b 100644 --- a/drivers/misc/lattice-ecp3-config.c +++ b/drivers/misc/lattice-ecp3-config.c @@ -69,7 +69,7 @@ static const struct ecp3_dev ecp3_dev[] = { static void firmware_load(const struct firmware *fw, void *context) { struct spi_device *spi = (struct spi_device *)context; - struct fpga_data *data = dev_get_drvdata(&spi->dev); + struct fpga_data *data = spi_get_drvdata(spi); u8 *buffer; int ret; u8 txbuf[8]; -- cgit v1.2.3 From 30e53bb8ffb1f3270ad89196d9799057008d9537 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Fri, 5 Apr 2013 22:10:34 +0300 Subject: mei: add debugfs hooks debugfs exposes device state and list of me clients and their properties Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/Makefile | 1 + drivers/misc/mei/debugfs.c | 149 +++++++++++++++++++++++++++++++++++++++++++++ drivers/misc/mei/main.c | 18 ++++-- drivers/misc/mei/mei_dev.h | 20 +++++- drivers/misc/mei/pci-me.c | 5 +- 5 files changed, 185 insertions(+), 8 deletions(-) create mode 100644 drivers/misc/mei/debugfs.c (limited to 'drivers') diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile index 1b29f7ccac49..3612d576a677 100644 --- a/drivers/misc/mei/Makefile +++ b/drivers/misc/mei/Makefile @@ -11,6 +11,7 @@ mei-objs += main.o mei-objs += amthif.o mei-objs += wd.o mei-objs += bus.o +mei-$(CONFIG_DEBUG_FS) += debugfs.o obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o mei-me-objs := pci-me.o diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c new file mode 100644 index 000000000000..7135a7186940 --- /dev/null +++ b/drivers/misc/mei/debugfs.c @@ -0,0 +1,149 @@ +/* + * + * Intel Management Engine Interface (Intel MEI) Linux driver + * Copyright (c) 2012-2013, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ +#include +#include +#include +#include +#include + +#include + +#include "mei_dev.h" +#include "hw.h" + +static int mei_dbgfs_open(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct mei_device *dev = fp->private_data; + struct mei_me_client *cl; + const size_t bufsz = 1024; + char *buf = kzalloc(bufsz, GFP_KERNEL); + int i; + int pos = 0; + int ret; + + if (!buf) + return -ENOMEM; + + pos += scnprintf(buf + pos, bufsz - pos, + " |id|addr| UUID |con|msg len|\n"); + + mutex_lock(&dev->device_lock); + + /* if the driver is not enabled the list won't b consitent */ + if (dev->dev_state != MEI_DEV_ENABLED) + goto out; + + for (i = 0; i < dev->me_clients_num; i++) { + cl = &dev->me_clients[i]; + + /* skip me clients that cannot be connected */ + if (cl->props.max_number_of_connections == 0) + continue; + + pos += scnprintf(buf + pos, bufsz - pos, + "%2d|%2d|%4d|%pUl|%3d|%7d|\n", + i, cl->client_id, + cl->props.fixed_address, + &cl->props.protocol_name, + cl->props.max_number_of_connections, + cl->props.max_msg_length); + } +out: + mutex_unlock(&dev->device_lock); + ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); + kfree(buf); + return ret; +} + +static const struct file_operations mei_dbgfs_fops_meclients = { + .open = mei_dbgfs_open, + .read = mei_dbgfs_read_meclients, + .llseek = generic_file_llseek, +}; + +static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct mei_device *dev = fp->private_data; + const size_t bufsz = 1024; + char *buf = kzalloc(bufsz, GFP_KERNEL); + int pos = 0; + int ret; + + if (!buf) + return -ENOMEM; + + pos += scnprintf(buf + pos, bufsz - pos, "%s\n", + mei_dev_state_str(dev->dev_state)); + ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); + kfree(buf); + return ret; +} +static const struct file_operations mei_dbgfs_fops_devstate = { + .open = mei_dbgfs_open, + .read = mei_dbgfs_read_devstate, + .llseek = generic_file_llseek, +}; + +/** + * mei_dbgfs_deregister - Remove the debugfs files and directories + * @mei - pointer to mei device private dat + */ +void mei_dbgfs_deregister(struct mei_device *dev) +{ + if (!dev->dbgfs_dir) + return; + debugfs_remove_recursive(dev->dbgfs_dir); + dev->dbgfs_dir = NULL; +} + +/** + * Add the debugfs files + * + */ +int mei_dbgfs_register(struct mei_device *dev, const char *name) +{ + struct dentry *dir, *f; + dir = debugfs_create_dir(name, NULL); + if (!dir) + return -ENOMEM; + + f = debugfs_create_file("meclients", S_IRUSR, dir, + dev, &mei_dbgfs_fops_meclients); + if (!f) { + dev_err(&dev->pdev->dev, "meclients: registration failed\n"); + goto err; + } + f = debugfs_create_file("devstate", S_IRUSR, dir, + dev, &mei_dbgfs_fops_devstate); + if (!f) { + dev_err(&dev->pdev->dev, "devstate: registration failed\n"); + goto err; + } + dev->dbgfs_dir = dir; + return 0; +err: + mei_dbgfs_deregister(dev); + return -ENODEV; +} + diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 872de9d1494b..329fb865cfd0 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -753,15 +753,25 @@ static struct miscdevice mei_misc_device = { .minor = MISC_DYNAMIC_MINOR, }; -int mei_register(struct device *dev) + +int mei_register(struct mei_device *dev) { - mei_misc_device.parent = dev; - return misc_register(&mei_misc_device); + int ret; + mei_misc_device.parent = &dev->pdev->dev; + ret = misc_register(&mei_misc_device); + if (ret) + return ret; + + if (mei_dbgfs_register(dev, mei_misc_device.name)) + dev_err(&dev->pdev->dev, "cannot register debugfs\n"); + + return 0; } EXPORT_SYMBOL_GPL(mei_register); -void mei_deregister(void) +void mei_deregister(struct mei_device *dev) { + mei_dbgfs_deregister(dev); misc_deregister(&mei_misc_device); mei_misc_device.parent = NULL; } diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 325f71abeb7a..8806be420f6b 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -437,6 +437,11 @@ struct mei_device { /* List of bus devices */ struct list_head device_list; +#if IS_ENABLED(CONFIG_DEBUG_FS) + struct dentry *dbgfs_dir; +#endif /* CONFIG_DEBUG_FS */ + + const struct mei_hw_ops *ops; char hw[0] __aligned(sizeof(void *)); }; @@ -603,8 +608,19 @@ static inline int mei_count_full_read_slots(struct mei_device *dev) return dev->ops->rdbuf_full_slots(dev); } -int mei_register(struct device *dev); -void mei_deregister(void); +#if IS_ENABLED(CONFIG_DEBUG_FS) +int mei_dbgfs_register(struct mei_device *dev, const char *name); +void mei_dbgfs_deregister(struct mei_device *dev); +#else +static inline int mei_dbgfs_register(struct mei_device *dev, const char *name) +{ + return 0; +} +static inline void mei_dbgfs_deregister(struct mei_device *dev) {} +#endif /* CONFIG_DEBUG_FS */ + +int mei_register(struct mei_device *dev); +void mei_deregister(struct mei_device *dev); #define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d comp=%1d" #define MEI_HDR_PRM(hdr) \ diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index a1a582b66f0d..88aec6a90ff4 100644 --- a/drivers/misc/mei/pci-me.c +++ b/drivers/misc/mei/pci-me.c @@ -190,7 +190,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto release_irq; } - err = mei_register(&pdev->dev); + err = mei_register(dev); if (err) goto release_irq; @@ -262,12 +262,13 @@ static void mei_me_remove(struct pci_dev *pdev) if (hw->mem_addr) pci_iounmap(pdev, hw->mem_addr); + mei_deregister(dev); + kfree(dev); pci_release_regions(pdev); pci_disable_device(pdev); - mei_deregister(); } #ifdef CONFIG_PM -- cgit v1.2.3 From 813b451644686fb7e26a54005e2f7bd495a06121 Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Mon, 8 Apr 2013 09:09:41 +0900 Subject: extcon: max77693: Staticize default_init_data Commit 0ec83bd246 ("extcon: max77693: Initialize register of MUIC device to bring up it without platform data") added this structure but forgot to make it static. Without this patch we get the following warning: drivers/extcon/extcon-max77693.c:41:26: warning: symbol 'default_init_data' was not declared. Should it be static? Signed-off-by: Sachin Kamat Signed-off-by: Chanwoo Choi Signed-off-by: Myungjoo Ham --- drivers/extcon/extcon-max77693.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c index 8f3c947b0029..7b2e93d4f60c 100644 --- a/drivers/extcon/extcon-max77693.c +++ b/drivers/extcon/extcon-max77693.c @@ -38,7 +38,7 @@ * extcon-max77693 driver use 'default_init_data' to bring up base operation * of MAX77693 MUIC device. */ -struct max77693_reg_data default_init_data[] = { +static struct max77693_reg_data default_init_data[] = { { /* STATUS2 - [3]ChgDetRun */ .addr = MAX77693_MUIC_REG_STATUS2, -- cgit v1.2.3 From 6ed28105c07e0e03bf5f5a99380b726fc4de6e93 Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Mon, 8 Apr 2013 09:11:06 +0900 Subject: extcon: max8997: use dev_err() instead of pr_err() dev_err() is more preferred than pr_err(). Signed-off-by: Jingoo Han Signed-off-by: Chanwoo Choi Signed-off-by: Myungjoo Ham --- drivers/extcon/extcon-max8997.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c index 69641bcae325..20772ad4adc0 100644 --- a/drivers/extcon/extcon-max8997.c +++ b/drivers/extcon/extcon-max8997.c @@ -646,7 +646,7 @@ static void max8997_muic_detect_cable_wq(struct work_struct *work) ret = max8997_muic_detect_dev(info); if (ret < 0) - pr_err("failed to detect cable type\n"); + dev_err(info->dev, "failed to detect cable type\n"); } static int max8997_muic_probe(struct platform_device *pdev) -- cgit v1.2.3 From c2536543d53be247786b8beb7c505c629fd55813 Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Mon, 8 Apr 2013 09:12:32 +0900 Subject: extcon: max77693: Fix return value Return the value obtained from the function instead of hardcoding. Silences the following warnings: drivers/extcon/extcon-max77693.c:297 max77693_muic_set_path() info: why not propagate 'ret' from max77693_update_reg() instead of (-11)? drivers/extcon/extcon-max77693.c:310 max77693_muic_set_path() info: why not propagate 'ret' from max77693_update_reg() instead of (-11)? Signed-off-by: Sachin Kamat Signed-off-by: Chanwoo Choi Signed-off-by: Myungjoo Ham --- drivers/extcon/extcon-max77693.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c index 7b2e93d4f60c..b56bdaa27d4b 100644 --- a/drivers/extcon/extcon-max77693.c +++ b/drivers/extcon/extcon-max77693.c @@ -258,7 +258,7 @@ static int max77693_muic_set_debounce_time(struct max77693_muic_info *info, CONTROL3_ADCDBSET_MASK); if (ret) { dev_err(info->dev, "failed to set ADC debounce time\n"); - return -EAGAIN; + return ret; } break; default: @@ -294,7 +294,7 @@ static int max77693_muic_set_path(struct max77693_muic_info *info, MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); - return -EAGAIN; + return ret; } if (attached) @@ -307,7 +307,7 @@ static int max77693_muic_set_path(struct max77693_muic_info *info, CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); - return -EAGAIN; + return ret; } dev_info(info->dev, @@ -1035,7 +1035,7 @@ static int max77693_muic_detect_accessory(struct max77693_muic_info *info) if (ret) { dev_err(info->dev, "failed to read MUIC register\n"); mutex_unlock(&info->mutex); - return -EINVAL; + return ret; } adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC, -- cgit v1.2.3 From 3ad9e86d54ed2770aa693a90a0872cbe7ffc6831 Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Mon, 8 Apr 2013 09:13:18 +0900 Subject: extcon: max8997: Fix return value Return the value obtained from the function instead of hardcoding. Fixes the following warnings: drivers/extcon/extcon-max8997.c:235 max8997_muic_set_path() info: why not propagate 'ret' from max8997_update_reg() instead of (-11)? drivers/extcon/extcon-max8997.c:248 max8997_muic_set_path() info: why not propagate 'ret' from max8997_update_reg() instead of (-11)? Signed-off-by: Sachin Kamat Signed-off-by: Chanwoo Choi Signed-off-by: Myungjoo Ham --- drivers/extcon/extcon-max8997.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers') diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c index 20772ad4adc0..67d6738d85a0 100644 --- a/drivers/extcon/extcon-max8997.c +++ b/drivers/extcon/extcon-max8997.c @@ -196,7 +196,7 @@ static int max8997_muic_set_debounce_time(struct max8997_muic_info *info, CONTROL3_ADCDBSET_MASK); if (ret) { dev_err(info->dev, "failed to set ADC debounce time\n"); - return -EAGAIN; + return ret; } break; default: @@ -232,7 +232,7 @@ static int max8997_muic_set_path(struct max8997_muic_info *info, MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); - return -EAGAIN; + return ret; } if (attached) @@ -245,7 +245,7 @@ static int max8997_muic_set_path(struct max8997_muic_info *info, CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); - return -EAGAIN; + return ret; } dev_info(info->dev, @@ -397,7 +397,7 @@ static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info, ret = max8997_muic_set_path(info, info->path_uart, attached); if (ret) { dev_err(info->dev, "failed to update muic register\n"); - return -EINVAL; + return ret; } extcon_set_cable_state(info->edev, "JIG", attached); @@ -608,7 +608,7 @@ static int max8997_muic_detect_dev(struct max8997_muic_info *info) if (ret) { dev_err(info->dev, "failed to read MUIC register\n"); mutex_unlock(&info->mutex); - return -EINVAL; + return ret; } adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC, -- cgit v1.2.3 From 4234a6deb5ab04e50cfd6d72761345727bd2de21 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Mon, 8 Apr 2013 21:56:37 +0300 Subject: mei: add mei_cl_write function consolidate write code to a specific me client in mei_cl_write function the function is called from mei device write handler and from mei_cl bus send function Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/bus.c | 103 ++++++++------------------------------------ drivers/misc/mei/client.c | 105 +++++++++++++++++++++++++++++++++++++++++++++ drivers/misc/mei/client.h | 7 ++- drivers/misc/mei/main.c | 83 +++++++---------------------------- drivers/misc/mei/mei_dev.h | 6 +-- 5 files changed, 146 insertions(+), 158 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 8dbcb1516dc6..6badfa1110e9 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -226,112 +226,47 @@ static int ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, bool blocking) { struct mei_device *dev; - struct mei_msg_hdr mei_hdr; struct mei_cl_cb *cb; - int me_cl_id, err; + int id; + int rets; if (WARN_ON(!cl || !cl->dev)) return -ENODEV; + dev = cl->dev; + if (cl->state != MEI_FILE_CONNECTED) return -ENODEV; + /* Check if we have an ME client device */ + id = mei_me_cl_by_id(dev, cl->me_client_id); + if (id < 0) + return -ENODEV; + + if (length > dev->me_clients[id].props.max_msg_length) + return -EINVAL; + cb = mei_io_cb_init(cl, NULL); if (!cb) return -ENOMEM; - err = mei_io_cb_alloc_req_buf(cb, length); - if (err < 0) { + rets = mei_io_cb_alloc_req_buf(cb, length); + if (rets < 0) { mei_io_cb_free(cb); - return err; + return rets; } memcpy(cb->request_buffer.data, buf, length); - cb->fop_type = MEI_FOP_WRITE; - - dev = cl->dev; mutex_lock(&dev->device_lock); - /* Check if we have an ME client device */ - me_cl_id = mei_me_cl_by_id(dev, cl->me_client_id); - if (me_cl_id == dev->me_clients_num) { - err = -ENODEV; - goto out_err; - } - - if (length > dev->me_clients[me_cl_id].props.max_msg_length) { - err = -EINVAL; - goto out_err; - } - - err = mei_cl_flow_ctrl_creds(cl); - if (err < 0) - goto out_err; - - /* Host buffer is not ready, we queue the request */ - if (err == 0 || !dev->hbuf_is_ready) { - cb->buf_idx = 0; - mei_hdr.msg_complete = 0; - cl->writing_state = MEI_WRITING; - - goto out; - } - - dev->hbuf_is_ready = false; - - /* Check for a maximum length */ - if (length > mei_hbuf_max_len(dev)) { - mei_hdr.length = mei_hbuf_max_len(dev); - mei_hdr.msg_complete = 0; - } else { - mei_hdr.length = length; - mei_hdr.msg_complete = 1; - } - - mei_hdr.host_addr = cl->host_client_id; - mei_hdr.me_addr = cl->me_client_id; - mei_hdr.reserved = 0; - - if (mei_write_message(dev, &mei_hdr, buf)) { - err = -EIO; - goto out_err; - } - - cl->writing_state = MEI_WRITING; - cb->buf_idx = mei_hdr.length; - -out: - if (mei_hdr.msg_complete) { - if (mei_cl_flow_ctrl_reduce(cl)) { - err = -ENODEV; - goto out_err; - } - list_add_tail(&cb->list, &dev->write_waiting_list.list); - } else { - list_add_tail(&cb->list, &dev->write_list.list); - } + rets = mei_cl_write(cl, cb, blocking); mutex_unlock(&dev->device_lock); + if (rets < 0) + mei_io_cb_free(cb); - if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) { - if (wait_event_interruptible(cl->tx_wait, - cl->writing_state == MEI_WRITE_COMPLETE)) { - if (signal_pending(current)) - err = -EINTR; - err = -ERESTARTSYS; - mutex_lock(&dev->device_lock); - goto out_err; - } - } - - return mei_hdr.length; - -out_err: - mutex_unlock(&dev->device_lock); - mei_io_cb_free(cb); - - return err; + return rets; } int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length) diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index e14397b09187..ecadd0053ba9 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -677,6 +677,111 @@ err: return rets; } +/** + * mei_cl_write - submit a write cb to mei device + assumes device_lock is locked + * + * @cl: host client + * @cl: write callback with filled data + * + * returns numbe of bytes sent on success, <0 on failure. + */ +int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) +{ + struct mei_device *dev; + struct mei_msg_data *buf; + struct mei_msg_hdr mei_hdr; + int rets; + + + if (WARN_ON(!cl || !cl->dev)) + return -ENODEV; + + if (WARN_ON(!cb)) + return -EINVAL; + + dev = cl->dev; + + + buf = &cb->request_buffer; + + dev_dbg(&dev->pdev->dev, "mei_cl_write %d\n", buf->size); + + + cb->fop_type = MEI_FOP_WRITE; + + rets = mei_cl_flow_ctrl_creds(cl); + if (rets < 0) + goto err; + + /* Host buffer is not ready, we queue the request */ + if (rets == 0 || !dev->hbuf_is_ready) { + cb->buf_idx = 0; + /* unseting complete will enqueue the cb for write */ + mei_hdr.msg_complete = 0; + cl->writing_state = MEI_WRITING; + rets = buf->size; + goto out; + } + + dev->hbuf_is_ready = false; + + /* Check for a maximum length */ + if (buf->size > mei_hbuf_max_len(dev)) { + mei_hdr.length = mei_hbuf_max_len(dev); + mei_hdr.msg_complete = 0; + } else { + mei_hdr.length = buf->size; + mei_hdr.msg_complete = 1; + } + + mei_hdr.host_addr = cl->host_client_id; + mei_hdr.me_addr = cl->me_client_id; + mei_hdr.reserved = 0; + + dev_dbg(&dev->pdev->dev, "write " MEI_HDR_FMT "\n", + MEI_HDR_PRM(&mei_hdr)); + + + if (mei_write_message(dev, &mei_hdr, buf->data)) { + rets = -EIO; + goto err; + } + + cl->writing_state = MEI_WRITING; + cb->buf_idx = mei_hdr.length; + + rets = buf->size; +out: + if (mei_hdr.msg_complete) { + if (mei_cl_flow_ctrl_reduce(cl)) { + rets = -ENODEV; + goto err; + } + list_add_tail(&cb->list, &dev->write_waiting_list.list); + } else { + list_add_tail(&cb->list, &dev->write_list.list); + } + + + if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) { + + mutex_unlock(&dev->device_lock); + if (wait_event_interruptible(cl->tx_wait, + cl->writing_state == MEI_WRITE_COMPLETE)) { + if (signal_pending(current)) + rets = -EINTR; + else + rets = -ERESTARTSYS; + } + mutex_lock(&dev->device_lock); + } +err: + return rets; +} + + + /** * mei_cl_all_disconnect - disconnect forcefully all connected clients * diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h index 214b2397ec3e..e890c8bf89d0 100644 --- a/drivers/misc/mei/client.h +++ b/drivers/misc/mei/client.h @@ -86,17 +86,16 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl); */ bool mei_cl_is_other_connecting(struct mei_cl *cl); int mei_cl_disconnect(struct mei_cl *cl); - -int mei_cl_read_start(struct mei_cl *cl); - int mei_cl_connect(struct mei_cl *cl, struct file *file); +int mei_cl_read_start(struct mei_cl *cl); +int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking); void mei_host_client_init(struct work_struct *work); + void mei_cl_all_disconnect(struct mei_device *dev); void mei_cl_all_read_wakeup(struct mei_device *dev); void mei_cl_all_write_clear(struct mei_device *dev); - #endif /* _MEI_CLIENT_H_ */ diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 329fb865cfd0..cb11b36512b5 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -342,11 +342,10 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, { struct mei_cl *cl = file->private_data; struct mei_cl_cb *write_cb = NULL; - struct mei_msg_hdr mei_hdr; struct mei_device *dev; unsigned long timeout = 0; int rets; - int i; + int id; if (WARN_ON(!cl || !cl->dev)) return -ENODEV; @@ -357,24 +356,24 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, if (dev->dev_state != MEI_DEV_ENABLED) { rets = -ENODEV; - goto err; + goto out; } - i = mei_me_cl_by_id(dev, cl->me_client_id); - if (i < 0) { + id = mei_me_cl_by_id(dev, cl->me_client_id); + if (id < 0) { rets = -ENODEV; - goto err; + goto out; } - if (length > dev->me_clients[i].props.max_msg_length || length <= 0) { + if (length > dev->me_clients[id].props.max_msg_length || length <= 0) { rets = -EMSGSIZE; - goto err; + goto out; } if (cl->state != MEI_FILE_CONNECTED) { - rets = -ENODEV; dev_err(&dev->pdev->dev, "host client = %d, is not connected to ME client = %d", cl->host_client_id, cl->me_client_id); - goto err; + rets = -ENODEV; + goto out; } if (cl == &dev->iamthif_cl) { write_cb = mei_amthif_find_read_list_entry(dev, file); @@ -412,17 +411,15 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, if (!write_cb) { dev_err(&dev->pdev->dev, "write cb allocation failed\n"); rets = -ENOMEM; - goto err; + goto out; } rets = mei_io_cb_alloc_req_buf(write_cb, length); if (rets) - goto err; - - dev_dbg(&dev->pdev->dev, "cb request size = %zd\n", length); + goto out; rets = copy_from_user(write_cb->request_buffer.data, ubuf, length); if (rets) - goto err; + goto out; cl->sm_state = 0; if (length == 4 && @@ -440,65 +437,17 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, if (rets) { dev_err(&dev->pdev->dev, "amthif write failed with status = %d\n", rets); - goto err; + goto out; } mutex_unlock(&dev->device_lock); return length; } - write_cb->fop_type = MEI_FOP_WRITE; - - dev_dbg(&dev->pdev->dev, "host client = %d, ME client = %d\n", - cl->host_client_id, cl->me_client_id); - rets = mei_cl_flow_ctrl_creds(cl); - if (rets < 0) - goto err; - - if (rets == 0 || !dev->hbuf_is_ready) { - write_cb->buf_idx = 0; - mei_hdr.msg_complete = 0; - cl->writing_state = MEI_WRITING; - goto out; - } - - dev->hbuf_is_ready = false; - if (length > mei_hbuf_max_len(dev)) { - mei_hdr.length = mei_hbuf_max_len(dev); - mei_hdr.msg_complete = 0; - } else { - mei_hdr.length = length; - mei_hdr.msg_complete = 1; - } - mei_hdr.host_addr = cl->host_client_id; - mei_hdr.me_addr = cl->me_client_id; - mei_hdr.reserved = 0; - - dev_dbg(&dev->pdev->dev, "write " MEI_HDR_FMT "\n", - MEI_HDR_PRM(&mei_hdr)); - if (mei_write_message(dev, &mei_hdr, write_cb->request_buffer.data)) { - rets = -ENODEV; - goto err; - } - cl->writing_state = MEI_WRITING; - write_cb->buf_idx = mei_hdr.length; - + rets = mei_cl_write(cl, write_cb, false); out: - if (mei_hdr.msg_complete) { - if (mei_cl_flow_ctrl_reduce(cl)) { - rets = -ENODEV; - goto err; - } - list_add_tail(&write_cb->list, &dev->write_waiting_list.list); - } else { - list_add_tail(&write_cb->list, &dev->write_list.list); - } - - mutex_unlock(&dev->device_lock); - return length; - -err: mutex_unlock(&dev->device_lock); - mei_io_cb_free(write_cb); + if (rets < 0) + mei_io_cb_free(write_cb); return rets; } diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 8806be420f6b..d786da6aa25b 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -153,7 +153,7 @@ enum mei_cb_file_ops { /* * Intel MEI message data struct */ -struct mei_message_data { +struct mei_msg_data { u32 size; unsigned char *data; }; @@ -184,8 +184,8 @@ struct mei_cl_cb { struct list_head list; struct mei_cl *cl; enum mei_cb_file_ops fop_type; - struct mei_message_data request_buffer; - struct mei_message_data response_buffer; + struct mei_msg_data request_buffer; + struct mei_msg_data response_buffer; unsigned long buf_idx; unsigned long read_time; struct file *file_object; -- cgit v1.2.3 From d6c36a475fccfca05fd05362c98e49f6dd07721c Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Mon, 8 Apr 2013 21:56:38 +0300 Subject: mei: notify about the reset in error level Display errors causing device reset using dev_err and not dev_dbg also change messages text to something more concise Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hbm.c | 21 +++++++++------------ drivers/misc/mei/interrupt.c | 6 +++--- 2 files changed, 12 insertions(+), 15 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index fb9e63ba3bb1..de7f5ba3194f 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -145,7 +145,7 @@ void mei_hbm_start_req(struct mei_device *dev) dev->recvd_msg = false; if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { - dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n"); + dev_err(&dev->pdev->dev, "version message writet failed\n"); dev->dev_state = MEI_DEV_RESETING; mei_reset(dev, 1); } @@ -175,7 +175,7 @@ static void mei_hbm_enum_clients_req(struct mei_device *dev) if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { dev->dev_state = MEI_DEV_RESETING; - dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n"); + dev_err(&dev->pdev->dev, "enumeration request write failed.\n"); mei_reset(dev, 1); } dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE; @@ -227,7 +227,7 @@ static int mei_hbm_prop_req(struct mei_device *dev) if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { dev->dev_state = MEI_DEV_RESETING; - dev_err(&dev->pdev->dev, "Properties request command failed\n"); + dev_err(&dev->pdev->dev, "properties request write failed\n"); mei_reset(dev, 1); return -EIO; @@ -557,7 +557,7 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) mei_hbm_enum_clients_req(dev); } else { dev->recvd_msg = false; - dev_dbg(&dev->pdev->dev, "reset due to received hbm: host start\n"); + dev_err(&dev->pdev->dev, "reset: wrong host start response\n"); mei_reset(dev, 1); return; } @@ -591,23 +591,20 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) me_client = &dev->me_clients[dev->me_client_presentation_num]; if (props_res->status || !dev->me_clients) { - dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n"); + dev_err(&dev->pdev->dev, "reset: properties response hbm wrong status.\n"); mei_reset(dev, 1); return; } if (me_client->client_id != props_res->address) { - dev_err(&dev->pdev->dev, - "Host client properties reply mismatch\n"); + dev_err(&dev->pdev->dev, "reset: host properties response address mismatch\n"); mei_reset(dev, 1); - return; } if (dev->dev_state != MEI_DEV_INIT_CLIENTS || dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) { - dev_err(&dev->pdev->dev, - "Unexpected client properties reply\n"); + dev_err(&dev->pdev->dev, "reset: unexpected properties response\n"); mei_reset(dev, 1); return; @@ -637,7 +634,7 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) /* first property reqeust */ mei_hbm_prop_req(dev); } else { - dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n"); + dev_err(&dev->pdev->dev, "reset: unexpected enumeration response hbm.\n"); mei_reset(dev, 1); return; } @@ -645,7 +642,7 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) case HOST_STOP_RES_CMD: dev->dev_state = MEI_DEV_DISABLED; - dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n"); + dev_info(&dev->pdev->dev, "reset: FW stop response.\n"); mei_reset(dev, 1); break; diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 255e0853479c..9ff8c61fe457 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -623,7 +623,7 @@ void mei_timer(struct work_struct *work) if (dev->dev_state == MEI_DEV_INIT_CLIENTS) { if (dev->init_clients_timer) { if (--dev->init_clients_timer == 0) { - dev_dbg(&dev->pdev->dev, "IMEI reset due to init clients timeout ,init clients state = %d.\n", + dev_err(&dev->pdev->dev, "reset: init clients timeout ,init clients state = %d.\n", dev->init_clients_state); mei_reset(dev, 1); } @@ -635,7 +635,7 @@ void mei_timer(struct work_struct *work) list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { if (cl_pos->timer_count) { if (--cl_pos->timer_count == 0) { - dev_dbg(&dev->pdev->dev, "HECI reset due to connect/disconnect timeout.\n"); + dev_err(&dev->pdev->dev, "reset: connect/disconnect timeout.\n"); mei_reset(dev, 1); goto out; } @@ -644,7 +644,7 @@ void mei_timer(struct work_struct *work) if (dev->iamthif_stall_timer) { if (--dev->iamthif_stall_timer == 0) { - dev_dbg(&dev->pdev->dev, "resetting because of hang to amthi.\n"); + dev_err(&dev->pdev->dev, "reset: amthif hanged.\n"); mei_reset(dev, 1); dev->iamthif_msg_buf_size = 0; dev->iamthif_msg_buf_index = 0; -- cgit v1.2.3 From e46980a10a76ec3282dd6832c1974b880acd23d3 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Tue, 9 Apr 2013 01:51:38 +0300 Subject: mei: bus: Add device enabling and disabling API It should be left to the drivers to enable and disable the device on the MEI bus when e.g getting probed. For drivers to be able to safely call the enable and disable hooks, the mei_cl_ops must be set before it's probed and thus this should happen before registering the device on the MEI bus. Hence the mei_cl_add_device() prototype change. Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- Documentation/misc-devices/mei/mei-client-bus.txt | 7 +- drivers/misc/mei/bus.c | 99 ++++++++++++++++++++++- drivers/misc/mei/mei_dev.h | 28 ++++--- include/linux/mei_cl_bus.h | 3 + 4 files changed, 123 insertions(+), 14 deletions(-) (limited to 'drivers') diff --git a/Documentation/misc-devices/mei/mei-client-bus.txt b/Documentation/misc-devices/mei/mei-client-bus.txt index 9dc5ebf94eb1..f83910a8ce76 100644 --- a/Documentation/misc-devices/mei/mei-client-bus.txt +++ b/Documentation/misc-devices/mei/mei-client-bus.txt @@ -104,13 +104,16 @@ int contact_probe(struct mei_cl_device *dev, struct mei_cl_device_id *id) struct contact_driver *contact; [...] + mei_cl_enable_device(dev); + mei_cl_register_event_cb(dev, contact_event_cb, contact); return 0; } -In the probe routine the driver basically registers an ME bus event handler -which is as close as it can get to registering a threaded IRQ handler. +In the probe routine the driver first enable the MEI device and then registers +an ME bus event handler which is as close as it can get to registering a +threaded IRQ handler. The handler implementation will typically call some I/O routine depending on the pending events: diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 6badfa1110e9..834ceeb69cbf 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -153,7 +153,8 @@ static struct mei_cl *mei_bus_find_mei_cl_by_uuid(struct mei_device *dev, return NULL; } struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, - uuid_le uuid, char *name) + uuid_le uuid, char *name, + struct mei_cl_ops *ops) { struct mei_cl_device *device; struct mei_cl *cl; @@ -168,6 +169,7 @@ struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, return NULL; device->cl = cl; + device->ops = ops; device->dev.parent = &dev->pdev->dev; device->dev.bus = &mei_cl_bus_type; @@ -408,6 +410,101 @@ void mei_cl_set_drvdata(struct mei_cl_device *device, void *data) } EXPORT_SYMBOL_GPL(mei_cl_set_drvdata); +int mei_cl_enable_device(struct mei_cl_device *device) +{ + int err; + struct mei_device *dev; + struct mei_cl *cl = device->cl; + + if (cl == NULL) + return -ENODEV; + + dev = cl->dev; + + mutex_lock(&dev->device_lock); + + cl->state = MEI_FILE_CONNECTING; + + err = mei_cl_connect(cl, NULL); + if (err < 0) { + mutex_unlock(&dev->device_lock); + dev_err(&dev->pdev->dev, "Could not connect to the ME client"); + + return err; + } + + mutex_unlock(&dev->device_lock); + + if (device->event_cb && !cl->read_cb) + mei_cl_read_start(device->cl); + + if (!device->ops || !device->ops->enable) + return 0; + + return device->ops->enable(device); +} +EXPORT_SYMBOL_GPL(mei_cl_enable_device); + +int mei_cl_disable_device(struct mei_cl_device *device) +{ + int err; + struct mei_device *dev; + struct mei_cl *cl = device->cl; + + if (cl == NULL) + return -ENODEV; + + dev = cl->dev; + + mutex_lock(&dev->device_lock); + + if (cl->state != MEI_FILE_CONNECTED) { + mutex_unlock(&dev->device_lock); + dev_err(&dev->pdev->dev, "Already disconnected"); + + return 0; + } + + cl->state = MEI_FILE_DISCONNECTING; + + err = mei_cl_disconnect(cl); + if (err < 0) { + mutex_unlock(&dev->device_lock); + dev_err(&dev->pdev->dev, + "Could not disconnect from the ME client"); + + return err; + } + + /* Flush queues and remove any pending read */ + mei_cl_flush_queues(cl); + + if (cl->read_cb) { + struct mei_cl_cb *cb = NULL; + + cb = mei_cl_find_read_cb(cl); + /* Remove entry from read list */ + if (cb) + list_del(&cb->list); + + cb = cl->read_cb; + cl->read_cb = NULL; + + if (cb) { + mei_io_cb_free(cb); + cb = NULL; + } + } + + mutex_unlock(&dev->device_lock); + + if (!device->ops || !device->ops->disable) + return 0; + + return device->ops->disable(device); +} +EXPORT_SYMBOL_GPL(mei_cl_disable_device); + void mei_cl_bus_rx_event(struct mei_cl *cl) { struct mei_cl_device *device = cl->device; diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index d786da6aa25b..c02967d01527 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -269,30 +269,36 @@ struct mei_hw_ops { }; /* MEI bus API*/ -struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, - uuid_le uuid, char *name); -void mei_cl_remove_device(struct mei_cl_device *device); - -int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length); -int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length); -int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length); /** - * struct mei_cl_transport_ops - MEI CL device transport ops + * struct mei_cl_ops - MEI CL device ops * This structure allows ME host clients to implement technology - * specific transport layers. + * specific operations. * + * @enable: Enable an MEI CL device. Some devices require specific + * HECI commands to initialize completely. + * @disable: Disable an MEI CL device. * @send: Tx hook for the device. This allows ME host clients to trap * the device driver buffers before actually physically * pushing it to the ME. * @recv: Rx hook for the device. This allows ME host clients to trap the * ME buffers before forwarding them to the device driver. */ -struct mei_cl_transport_ops { +struct mei_cl_ops { + int (*enable)(struct mei_cl_device *device); + int (*disable)(struct mei_cl_device *device); int (*send)(struct mei_cl_device *device, u8 *buf, size_t length); int (*recv)(struct mei_cl_device *device, u8 *buf, size_t length); }; +struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, + uuid_le uuid, char *name, + struct mei_cl_ops *ops); +void mei_cl_remove_device(struct mei_cl_device *device); + +int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length); +int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length); +int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length); void mei_cl_bus_rx_event(struct mei_cl *cl); int mei_cl_bus_init(void); void mei_cl_bus_exit(void); @@ -319,7 +325,7 @@ struct mei_cl_device { struct mei_cl *cl; - const struct mei_cl_transport_ops *ops; + const struct mei_cl_ops *ops; struct work_struct event_work; mei_cl_event_cb_t event_cb; diff --git a/include/linux/mei_cl_bus.h b/include/linux/mei_cl_bus.h index 1bece18825ba..d14af7b722ef 100644 --- a/include/linux/mei_cl_bus.h +++ b/include/linux/mei_cl_bus.h @@ -38,4 +38,7 @@ int mei_cl_register_event_cb(struct mei_cl_device *device, void *mei_cl_get_drvdata(const struct mei_cl_device *device); void mei_cl_set_drvdata(struct mei_cl_device *device, void *data); +int mei_cl_enable_device(struct mei_cl_device *device); +int mei_cl_disable_device(struct mei_cl_device *device); + #endif /* _LINUX_MEI_CL_BUS_H */ -- cgit v1.2.3 From 59fcd7c63abf0340f551f487264b67ff5f7a0b86 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Thu, 11 Apr 2013 03:03:29 +0200 Subject: mei: nfc: Initial nfc implementation NFC ME device is exported through the MEI bus to be consumed by the NFC subsystem. NFC is represented by two mei clients: An info one and the actual NFC one. In order to properly build the ME id we first need to retrieve the firmware information from the info client and then disconnect from it. Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/Makefile | 1 + drivers/misc/mei/client.c | 3 + drivers/misc/mei/init.c | 2 + drivers/misc/mei/mei_dev.h | 10 ++ drivers/misc/mei/nfc.c | 311 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 327 insertions(+) create mode 100644 drivers/misc/mei/nfc.c (limited to 'drivers') diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile index 3612d576a677..08698a466268 100644 --- a/drivers/misc/mei/Makefile +++ b/drivers/misc/mei/Makefile @@ -11,6 +11,7 @@ mei-objs += main.o mei-objs += amthif.o mei-objs += wd.o mei-objs += bus.o +mei-objs += nfc.o mei-$(CONFIG_DEBUG_FS) += debugfs.o obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index ecadd0053ba9..9541aa90d8f7 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -358,6 +358,9 @@ void mei_host_client_init(struct work_struct *work) mei_amthif_host_init(dev); else if (!uuid_le_cmp(client_props->protocol_name, mei_wd_guid)) mei_wd_host_init(dev); + else if (!uuid_le_cmp(client_props->protocol_name, mei_nfc_guid)) + mei_nfc_host_init(dev); + } dev->dev_state = MEI_DEV_ENABLED; diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 54b51c05fa41..4e102ad7ebc0 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -219,6 +219,8 @@ void mei_stop(struct mei_device *dev) mei_wd_stop(dev); + mei_nfc_host_exit(); + dev->dev_state = MEI_DEV_POWER_DOWN; mei_reset(dev, 0); diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index c02967d01527..cd5b6d4bbbd4 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -509,6 +509,16 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev, void mei_amthif_run_next_cmd(struct mei_device *dev); +/* + * NFC functions + */ +int mei_nfc_host_init(struct mei_device *dev); +void mei_nfc_host_exit(void); + +/* + * NFC Client UUID + */ +extern const uuid_le mei_nfc_guid; int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots, struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list); diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c new file mode 100644 index 000000000000..37d4b09bc795 --- /dev/null +++ b/drivers/misc/mei/nfc.c @@ -0,0 +1,311 @@ +/* + * + * Intel Management Engine Interface (Intel MEI) Linux driver + * Copyright (c) 2003-2013, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#include +#include +#include +#include +#include +#include + +#include "mei_dev.h" +#include "client.h" + +struct mei_nfc_cmd { + u8 command; + u8 status; + u16 req_id; + u32 reserved; + u16 data_size; + u8 sub_command; + u8 data[]; +} __packed; + +struct mei_nfc_reply { + u8 command; + u8 status; + u16 req_id; + u32 reserved; + u16 data_size; + u8 sub_command; + u8 reply_status; + u8 data[]; +} __packed; + +struct mei_nfc_if_version { + u8 radio_version_sw[3]; + u8 reserved[3]; + u8 radio_version_hw[3]; + u8 i2c_addr; + u8 fw_ivn; + u8 vendor_id; + u8 radio_type; +} __packed; + +struct mei_nfc_connect { + u8 fw_ivn; + u8 vendor_id; +} __packed; + +struct mei_nfc_connect_resp { + u8 fw_ivn; + u8 vendor_id; + u16 me_major; + u16 me_minor; + u16 me_hotfix; + u16 me_build; +} __packed; + +struct mei_nfc_hci_hdr { + u8 cmd; + u8 status; + u16 req_id; + u32 reserved; + u16 data_size; +} __packed; + +#define MEI_NFC_CMD_MAINTENANCE 0x00 +#define MEI_NFC_CMD_HCI_SEND 0x01 +#define MEI_NFC_CMD_HCI_RECV 0x02 + +#define MEI_NFC_SUBCMD_CONNECT 0x00 +#define MEI_NFC_SUBCMD_IF_VERSION 0x01 + +#define MEI_NFC_HEADER_SIZE 10 + +/** mei_nfc_dev - NFC mei device + * + * @cl: NFC host client + * @cl_info: NFC info host client + * @init_work: perform connection to the info client + * @fw_ivn: NFC Intervace Version Number + * @vendor_id: NFC manufacturer ID + * @radio_type: NFC radio type + */ +struct mei_nfc_dev { + struct mei_cl *cl; + struct mei_cl *cl_info; + struct work_struct init_work; + u8 fw_ivn; + u8 vendor_id; + u8 radio_type; +}; + +static struct mei_nfc_dev nfc_dev; + +/* UUIDs for NFC F/W clients */ +const uuid_le mei_nfc_guid = UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, + 0x94, 0xd4, 0x50, 0x26, + 0x67, 0x23, 0x77, 0x5c); + +static const uuid_le mei_nfc_info_guid = UUID_LE(0xd2de1625, 0x382d, 0x417d, + 0x48, 0xa4, 0xef, 0xab, + 0xba, 0x8a, 0x12, 0x06); + +static void mei_nfc_free(struct mei_nfc_dev *ndev) +{ + if (ndev->cl) { + list_del(&ndev->cl->device_link); + mei_cl_unlink(ndev->cl); + kfree(ndev->cl); + } + + if (ndev->cl_info) { + list_del(&ndev->cl_info->device_link); + mei_cl_unlink(ndev->cl_info); + kfree(ndev->cl_info); + } +} + +static int mei_nfc_if_version(struct mei_nfc_dev *ndev) +{ + struct mei_device *dev; + struct mei_cl *cl; + + struct mei_nfc_cmd cmd; + struct mei_nfc_reply *reply = NULL; + struct mei_nfc_if_version *version; + size_t if_version_length; + int bytes_recv, ret; + + cl = ndev->cl_info; + dev = cl->dev; + + memset(&cmd, 0, sizeof(struct mei_nfc_cmd)); + cmd.command = MEI_NFC_CMD_MAINTENANCE; + cmd.data_size = 1; + cmd.sub_command = MEI_NFC_SUBCMD_IF_VERSION; + + ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd)); + if (ret < 0) { + dev_err(&dev->pdev->dev, "Could not send IF version cmd\n"); + return ret; + } + + /* to be sure on the stack we alloc memory */ + if_version_length = sizeof(struct mei_nfc_reply) + + sizeof(struct mei_nfc_if_version); + + reply = kzalloc(if_version_length, GFP_KERNEL); + if (!reply) + return -ENOMEM; + + bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length); + if (bytes_recv < 0 || bytes_recv < sizeof(struct mei_nfc_reply)) { + dev_err(&dev->pdev->dev, "Could not read IF version\n"); + ret = -EIO; + goto err; + } + + version = (struct mei_nfc_if_version *)reply->data; + + ndev->fw_ivn = version->fw_ivn; + ndev->vendor_id = version->vendor_id; + ndev->radio_type = version->radio_type; + +err: + kfree(reply); + return ret; +} + +static void mei_nfc_init(struct work_struct *work) +{ + struct mei_device *dev; + struct mei_nfc_dev *ndev; + struct mei_cl *cl_info; + + ndev = container_of(work, struct mei_nfc_dev, init_work); + + cl_info = ndev->cl_info; + dev = cl_info->dev; + + mutex_lock(&dev->device_lock); + + if (mei_cl_connect(cl_info, NULL) < 0) { + mutex_unlock(&dev->device_lock); + dev_err(&dev->pdev->dev, + "Could not connect to the NFC INFO ME client"); + + goto err; + } + + mutex_unlock(&dev->device_lock); + + if (mei_nfc_if_version(ndev) < 0) { + dev_err(&dev->pdev->dev, "Could not get the NFC interfave version"); + + goto err; + } + + dev_info(&dev->pdev->dev, + "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n", + ndev->fw_ivn, ndev->vendor_id, ndev->radio_type); + + mutex_lock(&dev->device_lock); + + if (mei_cl_disconnect(cl_info) < 0) { + mutex_unlock(&dev->device_lock); + dev_err(&dev->pdev->dev, + "Could not disconnect the NFC INFO ME client"); + + goto err; + } + + mutex_unlock(&dev->device_lock); + + return; + +err: + mei_nfc_free(ndev); + + return; +} + + +int mei_nfc_host_init(struct mei_device *dev) +{ + struct mei_nfc_dev *ndev = &nfc_dev; + struct mei_cl *cl_info, *cl = NULL; + int i, ret; + + /* already initialzed */ + if (ndev->cl_info) + return 0; + + cl_info = mei_cl_allocate(dev); + cl = mei_cl_allocate(dev); + + if (!cl || !cl_info) { + ret = -ENOMEM; + goto err; + } + + /* check for valid client id */ + i = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid); + if (i < 0) { + dev_info(&dev->pdev->dev, "nfc: failed to find the client\n"); + ret = -ENOENT; + goto err; + } + + cl_info->me_client_id = dev->me_clients[i].client_id; + + ret = mei_cl_link(cl_info, MEI_HOST_CLIENT_ID_ANY); + if (ret) + goto err; + + cl_info->device_uuid = mei_nfc_info_guid; + + list_add_tail(&cl_info->device_link, &dev->device_list); + + /* check for valid client id */ + i = mei_me_cl_by_uuid(dev, &mei_nfc_guid); + if (i < 0) { + dev_info(&dev->pdev->dev, "nfc: failed to find the client\n"); + ret = -ENOENT; + goto err; + } + + cl->me_client_id = dev->me_clients[i].client_id; + + ret = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY); + if (ret) + goto err; + + cl->device_uuid = mei_nfc_guid; + + list_add_tail(&cl->device_link, &dev->device_list); + + ndev->cl_info = cl_info; + ndev->cl = cl; + + INIT_WORK(&ndev->init_work, mei_nfc_init); + schedule_work(&ndev->init_work); + + return 0; + +err: + mei_nfc_free(ndev); + + return ret; +} + +void mei_nfc_host_exit(void) +{ + struct mei_nfc_dev *ndev = &nfc_dev; + + mei_nfc_free(ndev); +} -- cgit v1.2.3 From 91a6b95f20e338ef63e55422b1f037665fc6440a Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Thu, 11 Apr 2013 03:03:30 +0200 Subject: mei: nfc: Add NFC device to the MEI bus After building its bus name as a string based on its vendor id and radio type, we can add it to the bus. Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/nfc.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) (limited to 'drivers') diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c index 37d4b09bc795..33354d94c0c2 100644 --- a/drivers/misc/mei/nfc.c +++ b/drivers/misc/mei/nfc.c @@ -102,6 +102,7 @@ struct mei_nfc_dev { u8 fw_ivn; u8 vendor_id; u8 radio_type; + char *bus_name; }; static struct mei_nfc_dev nfc_dev; @@ -115,6 +116,14 @@ static const uuid_le mei_nfc_info_guid = UUID_LE(0xd2de1625, 0x382d, 0x417d, 0x48, 0xa4, 0xef, 0xab, 0xba, 0x8a, 0x12, 0x06); +/* Vendors */ +#define MEI_NFC_VENDOR_INSIDE 0x00 +#define MEI_NFC_VENDOR_NXP 0x01 + +/* Radio types */ +#define MEI_NFC_VENDOR_INSIDE_UREAD 0x00 +#define MEI_NFC_VENDOR_NXP_PN544 0x01 + static void mei_nfc_free(struct mei_nfc_dev *ndev) { if (ndev->cl) { @@ -130,6 +139,51 @@ static void mei_nfc_free(struct mei_nfc_dev *ndev) } } +static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev) +{ + struct mei_device *dev; + + if (!ndev->cl) + return -ENODEV; + + dev = ndev->cl->dev; + + switch (ndev->vendor_id) { + case MEI_NFC_VENDOR_INSIDE: + switch (ndev->radio_type) { + case MEI_NFC_VENDOR_INSIDE_UREAD: + ndev->bus_name = "microread"; + return 0; + + default: + dev_err(&dev->pdev->dev, "Unknow radio type 0x%x\n", + ndev->radio_type); + + return -EINVAL; + } + + case MEI_NFC_VENDOR_NXP: + switch (ndev->radio_type) { + case MEI_NFC_VENDOR_NXP_PN544: + ndev->bus_name = "pn544"; + return 0; + default: + dev_err(&dev->pdev->dev, "Unknow radio type 0x%x\n", + ndev->radio_type); + + return -EINVAL; + } + + default: + dev_err(&dev->pdev->dev, "Unknow vendor ID 0x%x\n", + ndev->vendor_id); + + return -EINVAL; + } + + return 0; +} + static int mei_nfc_if_version(struct mei_nfc_dev *ndev) { struct mei_device *dev; @@ -184,6 +238,7 @@ err: static void mei_nfc_init(struct work_struct *work) { struct mei_device *dev; + struct mei_cl_device *cldev; struct mei_nfc_dev *ndev; struct mei_cl *cl_info; @@ -226,6 +281,23 @@ static void mei_nfc_init(struct work_struct *work) mutex_unlock(&dev->device_lock); + if (mei_nfc_build_bus_name(ndev) < 0) { + dev_err(&dev->pdev->dev, + "Could not build the bus ID name\n"); + return; + } + + cldev = mei_cl_add_device(dev, mei_nfc_guid, ndev->bus_name, NULL); + if (!cldev) { + dev_err(&dev->pdev->dev, + "Could not add the NFC device to the MEI bus\n"); + + goto err; + } + + cldev->priv_data = ndev; + + return; err: @@ -307,5 +379,8 @@ void mei_nfc_host_exit(void) { struct mei_nfc_dev *ndev = &nfc_dev; + if (ndev->cl && ndev->cl->device) + mei_cl_remove_device(ndev->cl->device); + mei_nfc_free(ndev); } -- cgit v1.2.3 From 36eda94fcf936ccee5a8693af7738174a56be898 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Thu, 11 Apr 2013 03:03:31 +0200 Subject: mei: nfc: Implement MEI bus ops The send ops for NFC builds the command header, updates the request id and then waits for an ACK. The recv ops check if it receives data or an ACK and in the latter case wakes the send ops up. The enable ops sends the NFC HECI connect command. Signed-off-by: Samuel Ortiz Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/nfc.c | 170 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 169 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c index 33354d94c0c2..3adf8a70f26e 100644 --- a/drivers/misc/mei/nfc.c +++ b/drivers/misc/mei/nfc.c @@ -15,6 +15,7 @@ */ #include +#include #include #include #include @@ -99,10 +100,14 @@ struct mei_nfc_dev { struct mei_cl *cl; struct mei_cl *cl_info; struct work_struct init_work; + wait_queue_head_t send_wq; u8 fw_ivn; u8 vendor_id; u8 radio_type; char *bus_name; + + u16 req_id; + u16 recv_req_id; }; static struct mei_nfc_dev nfc_dev; @@ -184,6 +189,73 @@ static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev) return 0; } +static int mei_nfc_connect(struct mei_nfc_dev *ndev) +{ + struct mei_device *dev; + struct mei_cl *cl; + struct mei_nfc_cmd *cmd, *reply; + struct mei_nfc_connect *connect; + struct mei_nfc_connect_resp *connect_resp; + size_t connect_length, connect_resp_length; + int bytes_recv, ret; + + cl = ndev->cl; + dev = cl->dev; + + connect_length = sizeof(struct mei_nfc_cmd) + + sizeof(struct mei_nfc_connect); + + connect_resp_length = sizeof(struct mei_nfc_cmd) + + sizeof(struct mei_nfc_connect_resp); + + cmd = kzalloc(connect_length, GFP_KERNEL); + if (!cmd) + return -ENOMEM; + connect = (struct mei_nfc_connect *)cmd->data; + + reply = kzalloc(connect_resp_length, GFP_KERNEL); + if (!reply) { + kfree(cmd); + return -ENOMEM; + } + + connect_resp = (struct mei_nfc_connect_resp *)reply->data; + + cmd->command = MEI_NFC_CMD_MAINTENANCE; + cmd->data_size = 3; + cmd->sub_command = MEI_NFC_SUBCMD_CONNECT; + connect->fw_ivn = ndev->fw_ivn; + connect->vendor_id = ndev->vendor_id; + + ret = __mei_cl_send(cl, (u8 *)cmd, connect_length); + if (ret < 0) { + dev_err(&dev->pdev->dev, "Could not send connect cmd\n"); + goto err; + } + + bytes_recv = __mei_cl_recv(cl, (u8 *)reply, connect_resp_length); + if (bytes_recv < 0) { + dev_err(&dev->pdev->dev, "Could not read connect response\n"); + ret = bytes_recv; + goto err; + } + + dev_info(&dev->pdev->dev, "IVN 0x%x Vendor ID 0x%x\n", + connect_resp->fw_ivn, connect_resp->vendor_id); + + dev_info(&dev->pdev->dev, "ME FW %d.%d.%d.%d\n", + connect_resp->me_major, connect_resp->me_minor, + connect_resp->me_hotfix, connect_resp->me_build); + + ret = 0; + +err: + kfree(reply); + kfree(cmd); + + return ret; +} + static int mei_nfc_if_version(struct mei_nfc_dev *ndev) { struct mei_device *dev; @@ -235,6 +307,100 @@ err: return ret; } +static int mei_nfc_enable(struct mei_cl_device *cldev) +{ + struct mei_device *dev; + struct mei_nfc_dev *ndev = &nfc_dev; + int ret; + + dev = ndev->cl->dev; + + ret = mei_nfc_connect(ndev); + if (ret < 0) { + dev_err(&dev->pdev->dev, "Could not connect to NFC"); + return ret; + } + + return 0; +} + +static int mei_nfc_disable(struct mei_cl_device *cldev) +{ + return 0; +} + +static int mei_nfc_send(struct mei_cl_device *cldev, u8 *buf, size_t length) +{ + struct mei_device *dev; + struct mei_nfc_dev *ndev; + struct mei_nfc_hci_hdr *hdr; + u8 *mei_buf; + int err; + + ndev = (struct mei_nfc_dev *) cldev->priv_data; + dev = ndev->cl->dev; + + mei_buf = kzalloc(length + MEI_NFC_HEADER_SIZE, GFP_KERNEL); + if (!mei_buf) + return -ENOMEM; + + hdr = (struct mei_nfc_hci_hdr *) mei_buf; + hdr->cmd = MEI_NFC_CMD_HCI_SEND; + hdr->status = 0; + hdr->req_id = ndev->req_id; + hdr->reserved = 0; + hdr->data_size = length; + + memcpy(mei_buf + MEI_NFC_HEADER_SIZE, buf, length); + + err = __mei_cl_send(ndev->cl, mei_buf, length + MEI_NFC_HEADER_SIZE); + if (err < 0) + return err; + + kfree(mei_buf); + + if (!wait_event_interruptible_timeout(ndev->send_wq, + ndev->recv_req_id == ndev->req_id, HZ)) { + dev_err(&dev->pdev->dev, "NFC MEI command timeout\n"); + err = -ETIMEDOUT; + } else { + ndev->req_id++; + } + + return err; +} + +static int mei_nfc_recv(struct mei_cl_device *cldev, u8 *buf, size_t length) +{ + struct mei_nfc_dev *ndev; + struct mei_nfc_hci_hdr *hci_hdr; + int received_length; + + ndev = (struct mei_nfc_dev *)cldev->priv_data; + + received_length = __mei_cl_recv(ndev->cl, buf, length); + if (received_length < 0) + return received_length; + + hci_hdr = (struct mei_nfc_hci_hdr *) buf; + + if (hci_hdr->cmd == MEI_NFC_CMD_HCI_SEND) { + ndev->recv_req_id = hci_hdr->req_id; + wake_up(&ndev->send_wq); + + return 0; + } + + return received_length; +} + +static struct mei_cl_ops nfc_ops = { + .enable = mei_nfc_enable, + .disable = mei_nfc_disable, + .send = mei_nfc_send, + .recv = mei_nfc_recv, +}; + static void mei_nfc_init(struct work_struct *work) { struct mei_device *dev; @@ -287,7 +453,7 @@ static void mei_nfc_init(struct work_struct *work) return; } - cldev = mei_cl_add_device(dev, mei_nfc_guid, ndev->bus_name, NULL); + cldev = mei_cl_add_device(dev, mei_nfc_guid, ndev->bus_name, &nfc_ops); if (!cldev) { dev_err(&dev->pdev->dev, "Could not add the NFC device to the MEI bus\n"); @@ -363,8 +529,10 @@ int mei_nfc_host_init(struct mei_device *dev) ndev->cl_info = cl_info; ndev->cl = cl; + ndev->req_id = 1; INIT_WORK(&ndev->init_work, mei_nfc_init); + init_waitqueue_head(&ndev->send_wq); schedule_work(&ndev->init_work); return 0; -- cgit v1.2.3 From a42f82f57a6411c89538a8c0a44150f67e449a4a Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Tue, 9 Apr 2013 14:30:19 +0800 Subject: mei: convert to use simple_open() This removes an open coded simple_open() function and replaces file operations references to the function with simple_open() instead. Signed-off-by: Wei Yongjun Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/debugfs.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c index 7135a7186940..e3870f22d238 100644 --- a/drivers/misc/mei/debugfs.c +++ b/drivers/misc/mei/debugfs.c @@ -24,12 +24,6 @@ #include "mei_dev.h" #include "hw.h" -static int mei_dbgfs_open(struct inode *inode, struct file *file) -{ - file->private_data = inode->i_private; - return 0; -} - static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf, size_t cnt, loff_t *ppos) { @@ -76,7 +70,7 @@ out: } static const struct file_operations mei_dbgfs_fops_meclients = { - .open = mei_dbgfs_open, + .open = simple_open, .read = mei_dbgfs_read_meclients, .llseek = generic_file_llseek, }; @@ -100,7 +94,7 @@ static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf, return ret; } static const struct file_operations mei_dbgfs_fops_devstate = { - .open = mei_dbgfs_open, + .open = simple_open, .read = mei_dbgfs_read_devstate, .llseek = generic_file_llseek, }; -- cgit v1.2.3 From 1c9354b0973a59a0292ec64e0b4dde7b9462931a Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Thu, 11 Apr 2013 11:24:39 +0200 Subject: misc: apds9802als: Fix suspend/resume The apds9802als driver implements runtime pm and at the same time uses the legacy pm callbacks for suspend and resume. This does not work since the i2c core wont look at the legacy pm callbacks if a driver has the 'pm' field set. This patch fixes it by moving over to dev_pm_ops for suspend/resume as well. Since both runtime pm and suspend/resume behave the same way this can easily be done using the UNIVERSAL_DEV_PM_OPS macro. Signed-off-by: Lars-Peter Clausen Cc: Hong Liu Signed-off-by: Greg Kroah-Hartman --- drivers/misc/apds9802als.c | 25 ++++--------------------- 1 file changed, 4 insertions(+), 21 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/apds9802als.c b/drivers/misc/apds9802als.c index d648b0893027..5b5fd8416b3e 100644 --- a/drivers/misc/apds9802als.c +++ b/drivers/misc/apds9802als.c @@ -272,19 +272,8 @@ static int apds9802als_remove(struct i2c_client *client) } #ifdef CONFIG_PM -static int apds9802als_suspend(struct i2c_client *client, pm_message_t mesg) -{ - als_set_power_state(client, false); - return 0; -} - -static int apds9802als_resume(struct i2c_client *client) -{ - als_set_default_config(client); - return 0; -} -static int apds9802als_runtime_suspend(struct device *dev) +static int apds9802als_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); @@ -292,7 +281,7 @@ static int apds9802als_runtime_suspend(struct device *dev) return 0; } -static int apds9802als_runtime_resume(struct device *dev) +static int apds9802als_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); @@ -300,16 +289,12 @@ static int apds9802als_runtime_resume(struct device *dev) return 0; } -static const struct dev_pm_ops apds9802als_pm_ops = { - .runtime_suspend = apds9802als_runtime_suspend, - .runtime_resume = apds9802als_runtime_resume, -}; +static UNIVERSAL_DEV_PM_OPS(apds9802als_pm_ops, apds9802als_suspend, + apds9802als_resume, NULL); #define APDS9802ALS_PM_OPS (&apds9802als_pm_ops) #else /* CONFIG_PM */ -#define apds9802als_suspend NULL -#define apds9802als_resume NULL #define APDS9802ALS_PM_OPS NULL #endif /* CONFIG_PM */ @@ -327,8 +312,6 @@ static struct i2c_driver apds9802als_driver = { }, .probe = apds9802als_probe, .remove = apds9802als_remove, - .suspend = apds9802als_suspend, - .resume = apds9802als_resume, .id_table = apds9802als_id, }; -- cgit v1.2.3 From 5d4717d76f06d56586addcda59572113167e07da Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Thu, 11 Apr 2013 11:24:40 +0200 Subject: misc: fsa8480: Use dev_pm_ops Use dev_pm_ops instead of the deprecated legacy suspend/resume callbacks. Signed-off-by: Lars-Peter Clausen Cc: Donggeun Kim Signed-off-by: Greg Kroah-Hartman --- drivers/misc/fsa9480.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/fsa9480.c b/drivers/misc/fsa9480.c index e8cbb1c59f4c..a725c79c35f5 100644 --- a/drivers/misc/fsa9480.c +++ b/drivers/misc/fsa9480.c @@ -474,10 +474,11 @@ static int fsa9480_remove(struct i2c_client *client) return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP -static int fsa9480_suspend(struct i2c_client *client, pm_message_t state) +static int fsa9480_suspend(struct device *dev) { + struct i2c_client *client = to_i2c_client(dev); struct fsa9480_usbsw *usbsw = i2c_get_clientdata(client); struct fsa9480_platform_data *pdata = usbsw->pdata; @@ -490,8 +491,9 @@ static int fsa9480_suspend(struct i2c_client *client, pm_message_t state) return 0; } -static int fsa9480_resume(struct i2c_client *client) +static int fsa9480_resume(struct device *dev) { + struct i2c_client *client = to_i2c_client(dev); struct fsa9480_usbsw *usbsw = i2c_get_clientdata(client); int dev1, dev2; @@ -515,12 +517,14 @@ static int fsa9480_resume(struct i2c_client *client) return 0; } +static SIMPLE_DEV_PM_OPS(fsa9480_pm_ops, fsa9480_suspend, fsa9480_resume); +#define FSA9480_PM_OPS (&fsa9480_pm_ops) + #else -#define fsa9480_suspend NULL -#define fsa9480_resume NULL +#define FSA9480_PM_OPS NULL -#endif /* CONFIG_PM */ +#endif /* CONFIG_PM_SLEEP */ static const struct i2c_device_id fsa9480_id[] = { {"fsa9480", 0}, @@ -531,11 +535,10 @@ MODULE_DEVICE_TABLE(i2c, fsa9480_id); static struct i2c_driver fsa9480_i2c_driver = { .driver = { .name = "fsa9480", + .pm = FSA9480_PM_OPS, }, .probe = fsa9480_probe, .remove = fsa9480_remove, - .resume = fsa9480_resume, - .suspend = fsa9480_suspend, .id_table = fsa9480_id, }; -- cgit v1.2.3 From 873bf4f46c7ab9b97da7458029e5e7b645578dfe Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Thu, 11 Apr 2013 11:24:41 +0200 Subject: misc: isl29003: Use dev_pm_ops Use dev_pm_ops instead of the deprecated legacy suspend/resume callbacks. Signed-off-by: Lars-Peter Clausen Cc: Daniel Mack Signed-off-by: Greg Kroah-Hartman --- drivers/misc/isl29003.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/isl29003.c b/drivers/misc/isl29003.c index 29b306c6bdb3..c5145b3fcce8 100644 --- a/drivers/misc/isl29003.c +++ b/drivers/misc/isl29003.c @@ -409,18 +409,20 @@ static int isl29003_remove(struct i2c_client *client) return 0; } -#ifdef CONFIG_PM -static int isl29003_suspend(struct i2c_client *client, pm_message_t mesg) +#ifdef CONFIG_PM_SLEEP +static int isl29003_suspend(struct device *dev) { + struct i2c_client *client = to_i2c_client(dev); struct isl29003_data *data = i2c_get_clientdata(client); data->power_state_before_suspend = isl29003_get_power_state(client); return isl29003_set_power_state(client, 0); } -static int isl29003_resume(struct i2c_client *client) +static int isl29003_resume(struct device *dev) { int i; + struct i2c_client *client = to_i2c_client(dev); struct isl29003_data *data = i2c_get_clientdata(client); /* restore registers from cache */ @@ -432,10 +434,12 @@ static int isl29003_resume(struct i2c_client *client) data->power_state_before_suspend); } +static SIMPLE_DEV_PM_OPS(isl29003_pm_ops, isl29003_suspend, isl29003_resume); +#define ISL29003_PM_OPS (&isl29003_pm_ops) + #else -#define isl29003_suspend NULL -#define isl29003_resume NULL -#endif /* CONFIG_PM */ +#define ISL29003_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ static const struct i2c_device_id isl29003_id[] = { { "isl29003", 0 }, @@ -447,9 +451,8 @@ static struct i2c_driver isl29003_driver = { .driver = { .name = ISL29003_DRV_NAME, .owner = THIS_MODULE, + .pm = ISL29003_PM_OPS, }, - .suspend = isl29003_suspend, - .resume = isl29003_resume, .probe = isl29003_probe, .remove = isl29003_remove, .id_table = isl29003_id, -- cgit v1.2.3 From a7761027656dc192b59617a6eb961e38097419ce Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Thu, 11 Apr 2013 11:24:42 +0200 Subject: misc: tsl2550: Use dev_pm_ops Use dev_pm_ops instead of the deprecated legacy suspend/resume callbacks. Signed-off-by: Lars-Peter Clausen Cc: Rodolfo Giometti Signed-off-by: Greg Kroah-Hartman --- drivers/misc/tsl2550.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/tsl2550.c b/drivers/misc/tsl2550.c index 1e7bc0eb081e..1dfde4d543db 100644 --- a/drivers/misc/tsl2550.c +++ b/drivers/misc/tsl2550.c @@ -417,24 +417,26 @@ static int tsl2550_remove(struct i2c_client *client) return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP -static int tsl2550_suspend(struct i2c_client *client, pm_message_t mesg) +static int tsl2550_suspend(struct device *dev) { - return tsl2550_set_power_state(client, 0); + return tsl2550_set_power_state(to_i2c_client(dev), 0); } -static int tsl2550_resume(struct i2c_client *client) +static int tsl2550_resume(struct device *dev) { - return tsl2550_set_power_state(client, 1); + return tsl2550_set_power_state(to_i2c_client(dev), 1); } +static SIMPLE_DEV_PM_OPS(tsl2550_pm_ops, tsl2550_suspend, tsl2550_resume); +#define TSL2550_PM_OPS (&tsl2550_pm_ops) + #else -#define tsl2550_suspend NULL -#define tsl2550_resume NULL +#define TSL2550_PM_OPS NULL -#endif /* CONFIG_PM */ +#endif /* CONFIG_PM_SLEEP */ static const struct i2c_device_id tsl2550_id[] = { { "tsl2550", 0 }, @@ -446,9 +448,8 @@ static struct i2c_driver tsl2550_driver = { .driver = { .name = TSL2550_DRV_NAME, .owner = THIS_MODULE, + .pm = TSL2550_PM_OPS, }, - .suspend = tsl2550_suspend, - .resume = tsl2550_resume, .probe = tsl2550_probe, .remove = tsl2550_remove, .id_table = tsl2550_id, -- cgit v1.2.3 From 5f1e54e8c12219aa49a8fb3eb1503eefb5294ea3 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Sat, 13 Apr 2013 23:41:25 +0300 Subject: mei: wd: fix line over 80 characters Fix checkpatch warning: WARNING: line over 80 characters Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/wd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/misc/mei/wd.c b/drivers/misc/mei/wd.c index 2413247fc392..eb3f05c8d7d0 100644 --- a/drivers/misc/mei/wd.c +++ b/drivers/misc/mei/wd.c @@ -317,7 +317,8 @@ end: * * returns 0 if success, negative errno code for failure */ -static int mei_wd_ops_set_timeout(struct watchdog_device *wd_dev, unsigned int timeout) +static int mei_wd_ops_set_timeout(struct watchdog_device *wd_dev, + unsigned int timeout) { struct mei_device *dev; -- cgit v1.2.3 From af0f3a56fa680fd6e2d88d4d02e3676f0607cebd Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Mon, 15 Apr 2013 09:42:37 -0700 Subject: scsi: pcmcia: nsp_cs: remove module init/exit function prototypes This driver now uses the module_pcmcia_driver() macro to supply the init/exit code. The nsp_cs_{init,exit} prototypes should be removed. Reported-by: kbuild test robot Signed-off-by: H Hartley Sweeten Cc: YOKOTA Hiroshi Cc: "James E.J. Bottomley" Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/pcmcia/nsp_cs.h | 4 ---- 1 file changed, 4 deletions(-) (limited to 'drivers') diff --git a/drivers/scsi/pcmcia/nsp_cs.h b/drivers/scsi/pcmcia/nsp_cs.h index 7fc9a9d0a448..4d4b4f53f3ab 100644 --- a/drivers/scsi/pcmcia/nsp_cs.h +++ b/drivers/scsi/pcmcia/nsp_cs.h @@ -331,10 +331,6 @@ static struct Scsi_Host *nsp_detect(struct scsi_host_template *sht); /* Interrupt handler */ //static irqreturn_t nspintr(int irq, void *dev_id); -/* Module entry point*/ -static int __init nsp_cs_init(void); -static void __exit nsp_cs_exit(void); - /* Debug */ #ifdef NSP_DEBUG static void show_command (struct scsi_cmnd *SCpnt); -- cgit v1.2.3 From 4dfc4b2167beb449587c432517518ebd1c2bf1dc Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Wed, 17 Apr 2013 10:07:52 -0700 Subject: Revert "scsi: pcmcia: nsp_cs: remove module init/exit function prototypes" This reverts commit af0f3a56fa680fd6e2d88d4d02e3676f0607cebd. It should go through the scsi tree instead. Cc: kbuild test robot Cc: H Hartley Sweeten Cc: YOKOTA Hiroshi Cc: "James E.J. Bottomley" Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/pcmcia/nsp_cs.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers') diff --git a/drivers/scsi/pcmcia/nsp_cs.h b/drivers/scsi/pcmcia/nsp_cs.h index 4d4b4f53f3ab..7fc9a9d0a448 100644 --- a/drivers/scsi/pcmcia/nsp_cs.h +++ b/drivers/scsi/pcmcia/nsp_cs.h @@ -331,6 +331,10 @@ static struct Scsi_Host *nsp_detect(struct scsi_host_template *sht); /* Interrupt handler */ //static irqreturn_t nspintr(int irq, void *dev_id); +/* Module entry point*/ +static int __init nsp_cs_init(void); +static void __exit nsp_cs_exit(void); + /* Debug */ #ifdef NSP_DEBUG static void show_command (struct scsi_cmnd *SCpnt); -- cgit v1.2.3 From 3a189b3ba027d4fe79100f728e19e935377f2e60 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Wed, 17 Apr 2013 10:08:51 -0700 Subject: Revert "drivers/scsi: use module_pcmcia_driver() in pcmcia drivers" This reverts commit 3e13ea450b6a4714ee05ba4d61e5b32821cde550. It should go through the scsi tree instead. Cc: kbuild test robot Cc: H Hartley Sweeten Cc: YOKOTA Hiroshi Cc: "James E.J. Bottomley" Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/pcmcia/aha152x_stub.c | 14 +++++++++++++- drivers/scsi/pcmcia/fdomain_stub.c | 14 +++++++++++++- drivers/scsi/pcmcia/nsp_cs.c | 17 ++++++++++++++++- drivers/scsi/pcmcia/qlogic_stub.c | 13 ++++++++++++- drivers/scsi/pcmcia/sym53c500_cs.c | 16 +++++++++++++++- 5 files changed, 69 insertions(+), 5 deletions(-) (limited to 'drivers') diff --git a/drivers/scsi/pcmcia/aha152x_stub.c b/drivers/scsi/pcmcia/aha152x_stub.c index df82a349e969..7d1609fa233c 100644 --- a/drivers/scsi/pcmcia/aha152x_stub.c +++ b/drivers/scsi/pcmcia/aha152x_stub.c @@ -220,4 +220,16 @@ static struct pcmcia_driver aha152x_cs_driver = { .id_table = aha152x_ids, .resume = aha152x_resume, }; -module_pcmcia_driver(aha152x_cs_driver); + +static int __init init_aha152x_cs(void) +{ + return pcmcia_register_driver(&aha152x_cs_driver); +} + +static void __exit exit_aha152x_cs(void) +{ + pcmcia_unregister_driver(&aha152x_cs_driver); +} + +module_init(init_aha152x_cs); +module_exit(exit_aha152x_cs); diff --git a/drivers/scsi/pcmcia/fdomain_stub.c b/drivers/scsi/pcmcia/fdomain_stub.c index ba84769e849f..714b248f5d5e 100644 --- a/drivers/scsi/pcmcia/fdomain_stub.c +++ b/drivers/scsi/pcmcia/fdomain_stub.c @@ -194,4 +194,16 @@ static struct pcmcia_driver fdomain_cs_driver = { .id_table = fdomain_ids, .resume = fdomain_resume, }; -module_pcmcia_driver(fdomain_cs_driver); + +static int __init init_fdomain_cs(void) +{ + return pcmcia_register_driver(&fdomain_cs_driver); +} + +static void __exit exit_fdomain_cs(void) +{ + pcmcia_unregister_driver(&fdomain_cs_driver); +} + +module_init(init_fdomain_cs); +module_exit(exit_fdomain_cs); diff --git a/drivers/scsi/pcmcia/nsp_cs.c b/drivers/scsi/pcmcia/nsp_cs.c index 76ca00cbc11e..b61a753eb896 100644 --- a/drivers/scsi/pcmcia/nsp_cs.c +++ b/drivers/scsi/pcmcia/nsp_cs.c @@ -1773,4 +1773,19 @@ static struct pcmcia_driver nsp_driver = { .suspend = nsp_cs_suspend, .resume = nsp_cs_resume, }; -module_pcmcia_driver(nsp_driver); + +static int __init nsp_cs_init(void) +{ + return pcmcia_register_driver(&nsp_driver); +} + +static void __exit nsp_cs_exit(void) +{ + pcmcia_unregister_driver(&nsp_driver); +} + + +module_init(nsp_cs_init) +module_exit(nsp_cs_exit) + +/* end */ diff --git a/drivers/scsi/pcmcia/qlogic_stub.c b/drivers/scsi/pcmcia/qlogic_stub.c index 8d4fdc292242..bcaf89fe0c9e 100644 --- a/drivers/scsi/pcmcia/qlogic_stub.c +++ b/drivers/scsi/pcmcia/qlogic_stub.c @@ -300,8 +300,19 @@ static struct pcmcia_driver qlogic_cs_driver = { .id_table = qlogic_ids, .resume = qlogic_resume, }; -module_pcmcia_driver(qlogic_cs_driver); + +static int __init init_qlogic_cs(void) +{ + return pcmcia_register_driver(&qlogic_cs_driver); +} + +static void __exit exit_qlogic_cs(void) +{ + pcmcia_unregister_driver(&qlogic_cs_driver); +} MODULE_AUTHOR("Tom Zerucha, Michael Griffith"); MODULE_DESCRIPTION("Driver for the PCMCIA Qlogic FAS SCSI controllers"); MODULE_LICENSE("GPL"); +module_init(init_qlogic_cs); +module_exit(exit_qlogic_cs); diff --git a/drivers/scsi/pcmcia/sym53c500_cs.c b/drivers/scsi/pcmcia/sym53c500_cs.c index 55b0b2b38a65..f5b52731abd9 100644 --- a/drivers/scsi/pcmcia/sym53c500_cs.c +++ b/drivers/scsi/pcmcia/sym53c500_cs.c @@ -881,4 +881,18 @@ static struct pcmcia_driver sym53c500_cs_driver = { .id_table = sym53c500_ids, .resume = sym53c500_resume, }; -module_pcmcia_driver(sym53c500_cs_driver); + +static int __init +init_sym53c500_cs(void) +{ + return pcmcia_register_driver(&sym53c500_cs_driver); +} + +static void __exit +exit_sym53c500_cs(void) +{ + pcmcia_unregister_driver(&sym53c500_cs_driver); +} + +module_init(init_sym53c500_cs); +module_exit(exit_sym53c500_cs); -- cgit v1.2.3 From 9b0d5efc421ac79d9a6d97c681eff93288093784 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Thu, 18 Apr 2013 23:03:48 +0300 Subject: mei: revamp hbm state machine 1. Rename init_clients_state to hbm_state and use MEI_HBM_ prefix for HBM states 2. Remove recvd_msg and use hbm state for synchronizing hbm protocol has successful start. We can wake up the hbm event from start response handler and remove the hack from the interrupt thread 3. mei_hbm_start_wait function encapsulate start completion waiting Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hbm.c | 53 +++++++++++++++++++++++++++++++++----------- drivers/misc/mei/hbm.h | 25 +++++++++++++++++++-- drivers/misc/mei/hw-me.c | 12 ---------- drivers/misc/mei/init.c | 22 +++--------------- drivers/misc/mei/interrupt.c | 4 ++-- drivers/misc/mei/main.c | 2 +- drivers/misc/mei/mei_dev.h | 13 +++-------- 7 files changed, 72 insertions(+), 59 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index de7f5ba3194f..4de80d9b7c45 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -123,12 +123,33 @@ static bool is_treat_specially_client(struct mei_cl *cl, return false; } +int mei_hbm_start_wait(struct mei_device *dev) +{ + int ret; + if (dev->hbm_state > MEI_HBM_START) + return 0; + + mutex_unlock(&dev->device_lock); + ret = wait_event_interruptible_timeout(dev->wait_recvd_msg, + dev->hbm_state == MEI_HBM_IDLE || + dev->hbm_state > MEI_HBM_START, + mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT)); + mutex_lock(&dev->device_lock); + + if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) { + dev->hbm_state = MEI_HBM_IDLE; + dev_err(&dev->pdev->dev, "wating for mei start failed\n"); + return -ETIMEDOUT; + } + return 0; +} + /** * mei_hbm_start_req - sends start request message. * * @dev: the device structure */ -void mei_hbm_start_req(struct mei_device *dev) +int mei_hbm_start_req(struct mei_device *dev) { struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; struct hbm_host_version_request *start_req; @@ -143,18 +164,19 @@ void mei_hbm_start_req(struct mei_device *dev) start_req->host_version.major_version = HBM_MAJOR_VERSION; start_req->host_version.minor_version = HBM_MINOR_VERSION; - dev->recvd_msg = false; + dev->hbm_state = MEI_HBM_IDLE; if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { dev_err(&dev->pdev->dev, "version message writet failed\n"); dev->dev_state = MEI_DEV_RESETING; mei_reset(dev, 1); + return -ENODEV; } - dev->init_clients_state = MEI_START_MESSAGE; + dev->hbm_state = MEI_HBM_START; dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; - return ; + return 0; } -/** +/* * mei_hbm_enum_clients_req - sends enumeration client request message. * * @dev: the device structure @@ -178,7 +200,7 @@ static void mei_hbm_enum_clients_req(struct mei_device *dev) dev_err(&dev->pdev->dev, "enumeration request write failed.\n"); mei_reset(dev, 1); } - dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE; + dev->hbm_state = MEI_HBM_ENUM_CLIENTS; dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; return; } @@ -208,6 +230,7 @@ static int mei_hbm_prop_req(struct mei_device *dev) /* We got all client properties */ if (next_client_index == MEI_CLIENTS_MAX) { + dev->hbm_state = MEI_HBM_STARTED; schedule_work(&dev->init_work); return 0; @@ -542,27 +565,28 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) dev->version = version_res->me_max_version; dev_dbg(&dev->pdev->dev, "version mismatch.\n"); + dev->hbm_state = MEI_HBM_STOP; mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr, dev->wr_msg.data); mei_write_message(dev, &dev->wr_msg.hdr, dev->wr_msg.data); + return; } dev->version.major_version = HBM_MAJOR_VERSION; dev->version.minor_version = HBM_MINOR_VERSION; if (dev->dev_state == MEI_DEV_INIT_CLIENTS && - dev->init_clients_state == MEI_START_MESSAGE) { + dev->hbm_state == MEI_HBM_START) { dev->init_clients_timer = 0; mei_hbm_enum_clients_req(dev); } else { - dev->recvd_msg = false; dev_err(&dev->pdev->dev, "reset: wrong host start response\n"); mei_reset(dev, 1); return; } - dev->recvd_msg = true; + wake_up_interruptible(&dev->wait_recvd_msg); dev_dbg(&dev->pdev->dev, "host start response message received.\n"); break; @@ -603,7 +627,7 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) } if (dev->dev_state != MEI_DEV_INIT_CLIENTS || - dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) { + dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { dev_err(&dev->pdev->dev, "reset: unexpected properties response\n"); mei_reset(dev, 1); @@ -623,13 +647,12 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) enum_res = (struct hbm_host_enum_response *) mei_msg; memcpy(dev->me_clients_map, enum_res->valid_addresses, 32); if (dev->dev_state == MEI_DEV_INIT_CLIENTS && - dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) { + dev->hbm_state == MEI_HBM_ENUM_CLIENTS) { dev->init_clients_timer = 0; dev->me_client_presentation_num = 0; dev->me_client_index = 0; mei_hbm_me_cl_allocate(dev); - dev->init_clients_state = - MEI_CLIENT_PROPERTIES_MESSAGE; + dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; /* first property reqeust */ mei_hbm_prop_req(dev); @@ -641,6 +664,9 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) break; case HOST_STOP_RES_CMD: + + if (dev->hbm_state != MEI_HBM_STOP) + dev_err(&dev->pdev->dev, "unexpected stop response hbm.\n"); dev->dev_state = MEI_DEV_DISABLED; dev_info(&dev->pdev->dev, "reset: FW stop response.\n"); mei_reset(dev, 1); @@ -654,6 +680,7 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) case ME_STOP_REQ_CMD: + dev->hbm_state = MEI_HBM_STOP; mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr, dev->wr_ext_msg.data); break; diff --git a/drivers/misc/mei/hbm.h b/drivers/misc/mei/hbm.h index b552afbaf85c..e80dc24ef3e2 100644 --- a/drivers/misc/mei/hbm.h +++ b/drivers/misc/mei/hbm.h @@ -17,6 +17,27 @@ #ifndef _MEI_HBM_H_ #define _MEI_HBM_H_ +struct mei_device; +struct mei_msg_hdr; +struct mei_cl; + +/** + * enum mei_hbm_state - host bus message protocol state + * + * @MEI_HBM_IDLE : protocol not started + * @MEI_HBM_START : start request message was sent + * @MEI_HBM_ENUM_CLIENTS : enumeration request was sent + * @MEI_HBM_CLIENT_PROPERTIES : acquiring clients properties + */ +enum mei_hbm_state { + MEI_HBM_IDLE = 0, + MEI_HBM_START, + MEI_HBM_ENUM_CLIENTS, + MEI_HBM_CLIENT_PROPERTIES, + MEI_HBM_STARTED, + MEI_HBM_STOP, +}; + void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr); static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length) @@ -28,8 +49,8 @@ static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length) hdr->reserved = 0; } -void mei_hbm_start_req(struct mei_device *dev); - +int mei_hbm_start_req(struct mei_device *dev); +int mei_hbm_start_wait(struct mei_device *dev); int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl); int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl); int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl); diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 5ad53ebf57b9..3d6dfa35b1d7 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -468,8 +468,6 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) struct mei_cl_cb complete_list; s32 slots; int rets; - bool bus_message_received; - dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n"); /* initialize our complete list */ @@ -525,17 +523,7 @@ end: dev_dbg(&dev->pdev->dev, "end of bottom half function.\n"); dev->hbuf_is_ready = mei_hbuf_is_ready(dev); - bus_message_received = false; - if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) { - dev_dbg(&dev->pdev->dev, "received waiting bus message\n"); - bus_message_received = true; - } mutex_unlock(&dev->device_lock); - if (bus_message_received) { - dev_dbg(&dev->pdev->dev, "wake up dev->wait_recvd_msg\n"); - wake_up_interruptible(&dev->wait_recvd_msg); - bus_message_received = false; - } mei_irq_compl_handler(dev, &complete_list); diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 4e102ad7ebc0..59159e05446c 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -80,8 +80,6 @@ EXPORT_SYMBOL_GPL(mei_device_init); */ int mei_start(struct mei_device *dev) { - int ret = 0; - mutex_lock(&dev->device_lock); /* acknowledge interrupt and stop interupts */ @@ -89,29 +87,15 @@ int mei_start(struct mei_device *dev) mei_hw_config(dev); - dev->recvd_msg = false; dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n"); mei_reset(dev, 1); - /* wait for ME to turn on ME_RDY */ - if (!dev->recvd_msg) { - mutex_unlock(&dev->device_lock); - ret = wait_event_interruptible_timeout(dev->wait_recvd_msg, - dev->recvd_msg, - mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT)); - mutex_lock(&dev->device_lock); - } - - if (ret <= 0 && !dev->recvd_msg) { - dev->dev_state = MEI_DEV_DISABLED; - dev_dbg(&dev->pdev->dev, - "wait_event_interruptible_timeout failed" - "on wait for ME to turn on ME_RDY.\n"); + if (mei_hbm_start_wait(dev)) { + dev_err(&dev->pdev->dev, "HBM haven't started"); goto err; } - if (!mei_host_is_ready(dev)) { dev_err(&dev->pdev->dev, "host is not ready.\n"); goto err; @@ -128,7 +112,6 @@ int mei_start(struct mei_device *dev) goto err; } - dev->recvd_msg = false; dev_dbg(&dev->pdev->dev, "link layer has been established.\n"); mutex_unlock(&dev->device_lock); @@ -158,6 +141,7 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) mei_hw_reset(dev, interrupts_enabled); + dev->hbm_state = MEI_HBM_IDLE; if (dev->dev_state != MEI_DEV_INITIALIZING) { if (dev->dev_state != MEI_DEV_DISABLED && diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 9ff8c61fe457..c1cc462cce0e 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -623,8 +623,8 @@ void mei_timer(struct work_struct *work) if (dev->dev_state == MEI_DEV_INIT_CLIENTS) { if (dev->init_clients_timer) { if (--dev->init_clients_timer == 0) { - dev_err(&dev->pdev->dev, "reset: init clients timeout ,init clients state = %d.\n", - dev->init_clients_state); + dev_err(&dev->pdev->dev, "reset: init clients timeout hbm_state = %d.\n", + dev->hbm_state); mei_reset(dev, 1); } } diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index cb11b36512b5..78b4da5ed96c 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -48,7 +48,7 @@ * * @inode: pointer to inode structure * @file: pointer to file structure - * + e * returns 0 on success, <0 on error */ static int mei_open(struct inode *inode, struct file *file) diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index cd5b6d4bbbd4..56dee56ab9cc 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -25,6 +25,7 @@ #include "hw.h" #include "hw-me-regs.h" +#include "hbm.h" /* * watch dog definition @@ -104,13 +105,6 @@ enum mei_dev_state { const char *mei_dev_state_str(int state); -/* init clients states*/ -enum mei_init_clients_states { - MEI_START_MESSAGE = 0, - MEI_ENUM_CLIENTS_MESSAGE, - MEI_CLIENT_PROPERTIES_MESSAGE -}; - enum iamthif_states { MEI_IAMTHIF_IDLE, MEI_IAMTHIF_WRITING, @@ -338,6 +332,7 @@ struct mei_cl_device { /** * struct mei_device - MEI private device struct + * @hbm_state - state of host bus message protocol * @mem_addr - mem mapped base register address * @hbuf_depth - depth of hardware host/write buffer is slots @@ -370,8 +365,6 @@ struct mei_device { struct delayed_work timer_work; /* MEI timer delayed work (timeouts) */ bool recvd_hw_ready; - bool recvd_msg; - /* * waiting queue for receive message from FW */ @@ -383,7 +376,7 @@ struct mei_device { * mei device states */ enum mei_dev_state dev_state; - enum mei_init_clients_states init_clients_state; + enum mei_hbm_state hbm_state; u16 init_clients_timer; unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; /* control messages */ -- cgit v1.2.3 From 5ceb46e25d727f198c1efe281d19653962a51931 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Fri, 19 Apr 2013 21:16:53 +0300 Subject: mei: revamp mei_amthif_irq_read_message Rename the function to mei_amthif_irq_read_msg and change parameters order Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/amthif.c | 10 +++++----- drivers/misc/mei/interrupt.c | 2 +- drivers/misc/mei/mei_dev.h | 9 +++++++++ 3 files changed, 15 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index 9a5e8c72628b..31a6212cb8b1 100644 --- a/drivers/misc/mei/amthif.c +++ b/drivers/misc/mei/amthif.c @@ -505,14 +505,15 @@ int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots, * mei_amthif_irq_read_message - read routine after ISR to * handle the read amthif message * - * @complete_list: An instance of our list structure * @dev: the device structure * @mei_hdr: header of amthif message + * @complete_list: An instance of our list structure * * returns 0 on success, <0 on failure. */ -int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list, - struct mei_device *dev, struct mei_msg_hdr *mei_hdr) +int mei_amthif_irq_read_msg(struct mei_device *dev, + struct mei_msg_hdr *mei_hdr, + struct mei_cl_cb *complete_list) { struct mei_cl_cb *cb; unsigned char *buffer; @@ -530,8 +531,7 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list, if (!mei_hdr->msg_complete) return 0; - dev_dbg(&dev->pdev->dev, - "amthif_message_buffer_index =%d\n", + dev_dbg(&dev->pdev->dev, "amthif_message_buffer_index =%d\n", mei_hdr->length); dev_dbg(&dev->pdev->dev, "completed amthif read.\n "); diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index c1cc462cce0e..8e4db3d77e07 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -418,7 +418,7 @@ int mei_irq_read_handler(struct mei_device *dev, dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr)); - ret = mei_amthif_irq_read_message(cmpl_list, dev, mei_hdr); + ret = mei_amthif_irq_read_msg(dev, mei_hdr, cmpl_list); if (ret) goto end; } else { diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 56dee56ab9cc..c91c492063aa 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -502,6 +502,15 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev, void mei_amthif_run_next_cmd(struct mei_device *dev); +int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots, + struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list); + +void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb); +int mei_amthif_irq_read_msg(struct mei_device *dev, + struct mei_msg_hdr *mei_hdr, + struct mei_cl_cb *complete_list); +int mei_amthif_irq_read(struct mei_device *dev, s32 *slots); + /* * NFC functions */ -- cgit v1.2.3 From 6e0f180fd8b47fa0884177a142e41a86117edc23 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Fri, 19 Apr 2013 22:01:34 +0300 Subject: mei: revamp mei_irq_read_client_message function 1. Rename the function and change parameters order, so that first parameter is mei_device 2. Simplify the function code flow 3. Rename helper functions to more self descriptive names 4. Use helpers common functions where possible Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/interrupt.c | 124 +++++++++++++++++++++++-------------------- 1 file changed, 66 insertions(+), 58 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 8e4db3d77e07..9bf64c06fa39 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -82,80 +82,90 @@ void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *compl_list) } } EXPORT_SYMBOL_GPL(mei_irq_compl_handler); + /** - * _mei_irq_thread_state_ok - checks if mei header matches file private data + * mei_cl_hbm_equal - check if hbm is addressed to the client * - * @cl: private data of the file object + * @cl: host client * @mei_hdr: header of mei client message * - * returns !=0 if matches, 0 if no match. + * returns true if matches, false otherwise + */ +static inline int mei_cl_hbm_equal(struct mei_cl *cl, + struct mei_msg_hdr *mei_hdr) +{ + return cl->host_client_id == mei_hdr->host_addr && + cl->me_client_id == mei_hdr->me_addr; +} +/** + * mei_cl_is_reading - checks if the client + is the one to read this message + * + * @cl: mei client + * @mei_hdr: header of mei message + * + * returns true on match and false otherwise */ -static int _mei_irq_thread_state_ok(struct mei_cl *cl, - struct mei_msg_hdr *mei_hdr) +static bool mei_cl_is_reading(struct mei_cl *cl, struct mei_msg_hdr *mei_hdr) { - return (cl->host_client_id == mei_hdr->host_addr && - cl->me_client_id == mei_hdr->me_addr && + return mei_cl_hbm_equal(cl, mei_hdr) && cl->state == MEI_FILE_CONNECTED && - MEI_READ_COMPLETE != cl->reading_state); + cl->reading_state != MEI_READ_COMPLETE; } /** - * mei_irq_thread_read_client_message - bottom half read routine after ISR to - * handle the read mei client message data processing. + * mei_irq_read_client_message - process client message * - * @complete_list: An instance of our list structure * @dev: the device structure * @mei_hdr: header of mei client message + * @complete_list: An instance of our list structure * * returns 0 on success, <0 on failure. */ -static int mei_irq_thread_read_client_message(struct mei_cl_cb *complete_list, - struct mei_device *dev, - struct mei_msg_hdr *mei_hdr) +static int mei_cl_irq_read_msg(struct mei_device *dev, + struct mei_msg_hdr *mei_hdr, + struct mei_cl_cb *complete_list) { struct mei_cl *cl; - struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; + struct mei_cl_cb *cb, *next; unsigned char *buffer = NULL; - dev_dbg(&dev->pdev->dev, "start client msg\n"); - if (list_empty(&dev->read_list.list)) - goto quit; - - list_for_each_entry_safe(cb_pos, cb_next, &dev->read_list.list, list) { - cl = cb_pos->cl; - if (cl && _mei_irq_thread_state_ok(cl, mei_hdr)) { - cl->reading_state = MEI_READING; - buffer = cb_pos->response_buffer.data + cb_pos->buf_idx; - - if (cb_pos->response_buffer.size < - mei_hdr->length + cb_pos->buf_idx) { - dev_dbg(&dev->pdev->dev, "message overflow.\n"); - list_del(&cb_pos->list); - return -ENOMEM; - } - if (buffer) - mei_read_slots(dev, buffer, mei_hdr->length); - - cb_pos->buf_idx += mei_hdr->length; - if (mei_hdr->msg_complete) { - cl->status = 0; - list_del(&cb_pos->list); - dev_dbg(&dev->pdev->dev, - "completed read H cl = %d, ME cl = %d, length = %lu\n", - cl->host_client_id, - cl->me_client_id, - cb_pos->buf_idx); - - list_add_tail(&cb_pos->list, - &complete_list->list); - } + list_for_each_entry_safe(cb, next, &dev->read_list.list, list) { + cl = cb->cl; + if (!cl || !mei_cl_is_reading(cl, mei_hdr)) + continue; - break; + cl->reading_state = MEI_READING; + + if (cb->response_buffer.size == 0 || + cb->response_buffer.data == NULL) { + dev_err(&dev->pdev->dev, "response buffer is not allocated.\n"); + list_del(&cb->list); + return -ENOMEM; + } + + if (cb->response_buffer.size < mei_hdr->length + cb->buf_idx) { + dev_warn(&dev->pdev->dev, "message overflow.\n"); + list_del(&cb->list); + return -ENOMEM; } + buffer = cb->response_buffer.data + cb->buf_idx; + mei_read_slots(dev, buffer, mei_hdr->length); + + cb->buf_idx += mei_hdr->length; + if (mei_hdr->msg_complete) { + cl->status = 0; + list_del(&cb->list); + dev_dbg(&dev->pdev->dev, "completed read H cl = %d, ME cl = %d, length = %lu\n", + cl->host_client_id, + cl->me_client_id, + cb->buf_idx); + list_add_tail(&cb->list, &complete_list->list); + } + break; } -quit: dev_dbg(&dev->pdev->dev, "message read\n"); if (!buffer) { mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length); @@ -386,8 +396,7 @@ int mei_irq_read_handler(struct mei_device *dev, " client = %d, ME client = %d\n", cl_pos->host_client_id, cl_pos->me_client_id); - if (cl_pos->host_client_id == mei_hdr->host_addr && - cl_pos->me_client_id == mei_hdr->me_addr) + if (mei_cl_hbm_equal(cl_pos, mei_hdr)) break; } @@ -398,7 +407,7 @@ int mei_irq_read_handler(struct mei_device *dev, } } if (((*slots) * sizeof(u32)) < mei_hdr->length) { - dev_dbg(&dev->pdev->dev, + dev_err(&dev->pdev->dev, "we can't read the message slots =%08x.\n", *slots); /* we can't read the message */ @@ -414,20 +423,19 @@ int mei_irq_read_handler(struct mei_device *dev, } else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id && (MEI_FILE_CONNECTED == dev->iamthif_cl.state) && (dev->iamthif_state == MEI_IAMTHIF_READING)) { - dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n"); + dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n"); dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr)); ret = mei_amthif_irq_read_msg(dev, mei_hdr, cmpl_list); if (ret) goto end; } else { - dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_client_message.\n"); - ret = mei_irq_thread_read_client_message(cmpl_list, - dev, mei_hdr); + dev_dbg(&dev->pdev->dev, "call mei_cl_irq_read_msg.\n"); + dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr)); + ret = mei_cl_irq_read_msg(dev, mei_hdr, cmpl_list); if (ret) goto end; - } /* reset the number of slots and header */ @@ -436,7 +444,7 @@ int mei_irq_read_handler(struct mei_device *dev, if (*slots == -EOVERFLOW) { /* overflow - reset */ - dev_dbg(&dev->pdev->dev, "resetting due to slots overflow.\n"); + dev_err(&dev->pdev->dev, "resetting due to slots overflow.\n"); /* set the event since message has been read */ ret = -ERANGE; goto end; -- cgit v1.2.3 From fcb136e1ac5774909e0d85189f721b8dfa800e0f Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Fri, 19 Apr 2013 22:01:35 +0300 Subject: mei: fix reading large reposnes While writting to device is limitted to max_msg_length advertized in client properites the read can be much longer delivered consequiting chunks. We use krealloc to enlarge the buffer when needed. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/bus.c | 8 ++++---- drivers/misc/mei/client.c | 7 ++++--- drivers/misc/mei/client.h | 2 +- drivers/misc/mei/interrupt.c | 18 +++++++++++++++--- drivers/misc/mei/main.c | 7 +++---- 5 files changed, 27 insertions(+), 15 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 834ceeb69cbf..1e935eacaa7f 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -286,7 +286,7 @@ int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length) mutex_lock(&dev->device_lock); if (!cl->read_cb) { - err = mei_cl_read_start(cl); + err = mei_cl_read_start(cl, length); if (err < 0) { mutex_unlock(&dev->device_lock); return err; @@ -378,7 +378,7 @@ static void mei_bus_event_work(struct work_struct *work) device->events = 0; /* Prepare for the next read */ - mei_cl_read_start(device->cl); + mei_cl_read_start(device->cl, 0); } int mei_cl_register_event_cb(struct mei_cl_device *device, @@ -392,7 +392,7 @@ int mei_cl_register_event_cb(struct mei_cl_device *device, device->event_context = context; INIT_WORK(&device->event_work, mei_bus_event_work); - mei_cl_read_start(device->cl); + mei_cl_read_start(device->cl, 0); return 0; } @@ -436,7 +436,7 @@ int mei_cl_enable_device(struct mei_cl_device *device) mutex_unlock(&dev->device_lock); if (device->event_cb && !cl->read_cb) - mei_cl_read_start(device->cl); + mei_cl_read_start(device->cl, 0); if (!device->ops || !device->ops->enable) return 0; diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index 9541aa90d8f7..71892745e2e8 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -624,7 +624,7 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl) * * returns 0 on success, <0 on failure. */ -int mei_cl_read_start(struct mei_cl *cl) +int mei_cl_read_start(struct mei_cl *cl, size_t length) { struct mei_device *dev; struct mei_cl_cb *cb; @@ -657,8 +657,9 @@ int mei_cl_read_start(struct mei_cl *cl) if (!cb) return -ENOMEM; - rets = mei_io_cb_alloc_resp_buf(cb, - dev->me_clients[i].props.max_msg_length); + /* always allocate at least client max message */ + length = max_t(size_t, length, dev->me_clients[i].props.max_msg_length); + rets = mei_io_cb_alloc_resp_buf(cb, length); if (rets) goto err; diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h index e890c8bf89d0..cfdb144526aa 100644 --- a/drivers/misc/mei/client.h +++ b/drivers/misc/mei/client.h @@ -87,7 +87,7 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl); bool mei_cl_is_other_connecting(struct mei_cl *cl); int mei_cl_disconnect(struct mei_cl *cl); int mei_cl_connect(struct mei_cl *cl, struct file *file); -int mei_cl_read_start(struct mei_cl *cl); +int mei_cl_read_start(struct mei_cl *cl, size_t length); int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking); void mei_host_client_init(struct work_struct *work); diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 9bf64c06fa39..74730713a8d3 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -145,9 +145,21 @@ static int mei_cl_irq_read_msg(struct mei_device *dev, } if (cb->response_buffer.size < mei_hdr->length + cb->buf_idx) { - dev_warn(&dev->pdev->dev, "message overflow.\n"); - list_del(&cb->list); - return -ENOMEM; + dev_dbg(&dev->pdev->dev, "message overflow. size %d len %d idx %ld\n", + cb->response_buffer.size, + mei_hdr->length, cb->buf_idx); + cb->response_buffer.data = + krealloc(cb->response_buffer.data, + mei_hdr->length + cb->buf_idx, + GFP_KERNEL); + + if (!cb->response_buffer.data) { + dev_err(&dev->pdev->dev, "allocation failed.\n"); + list_del(&cb->list); + return -ENOMEM; + } + cb->response_buffer.size = + mei_hdr->length + cb->buf_idx; } buffer = cb->response_buffer.data + cb->buf_idx; diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 78b4da5ed96c..7c44c8dbae42 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -244,7 +244,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf, goto out; } - err = mei_cl_read_start(cl); + err = mei_cl_read_start(cl, length); if (err && err != -EBUSY) { dev_dbg(&dev->pdev->dev, "mei start read failure with status = %d\n", err); @@ -292,9 +292,8 @@ static ssize_t mei_read(struct file *file, char __user *ubuf, } /* now copy the data to user space */ copy_buffer: - dev_dbg(&dev->pdev->dev, "cb->response_buffer size - %d\n", - cb->response_buffer.size); - dev_dbg(&dev->pdev->dev, "cb->buf_idx - %lu\n", cb->buf_idx); + dev_dbg(&dev->pdev->dev, "buf.size = %d buf.idx= %ld\n", + cb->response_buffer.size, cb->buf_idx); if (length == 0 || ubuf == NULL || *offset > cb->buf_idx) { rets = -EMSGSIZE; goto free; -- cgit v1.2.3 From 0cfee51c7c1fa47d81b3d116df3b53c586aac422 Mon Sep 17 00:00:00 2001 From: Bill Nottingham Date: Fri, 19 Apr 2013 22:01:36 +0300 Subject: mei: reseting -> resetting This enum leaks out to userspace via error messages, so fix the spelling. Signed-off-by: Bill Nottingham Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hbm.c | 8 ++++---- drivers/misc/mei/hw-me.c | 2 +- drivers/misc/mei/init.c | 4 ++-- drivers/misc/mei/mei_dev.h | 2 +- 4 files changed, 8 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index 4de80d9b7c45..db605f5cf187 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -52,7 +52,7 @@ static void mei_hbm_me_cl_allocate(struct mei_device *dev) sizeof(struct mei_me_client), GFP_KERNEL); if (!clients) { dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n"); - dev->dev_state = MEI_DEV_RESETING; + dev->dev_state = MEI_DEV_RESETTING; mei_reset(dev, 1); return; } @@ -167,7 +167,7 @@ int mei_hbm_start_req(struct mei_device *dev) dev->hbm_state = MEI_HBM_IDLE; if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { dev_err(&dev->pdev->dev, "version message writet failed\n"); - dev->dev_state = MEI_DEV_RESETING; + dev->dev_state = MEI_DEV_RESETTING; mei_reset(dev, 1); return -ENODEV; } @@ -196,7 +196,7 @@ static void mei_hbm_enum_clients_req(struct mei_device *dev) enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { - dev->dev_state = MEI_DEV_RESETING; + dev->dev_state = MEI_DEV_RESETTING; dev_err(&dev->pdev->dev, "enumeration request write failed.\n"); mei_reset(dev, 1); } @@ -249,7 +249,7 @@ static int mei_hbm_prop_req(struct mei_device *dev) prop_req->address = next_client_index; if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) { - dev->dev_state = MEI_DEV_RESETING; + dev->dev_state = MEI_DEV_RESETTING; dev_err(&dev->pdev->dev, "properties request write failed\n"); mei_reset(dev, 1); diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 3d6dfa35b1d7..fc032270916a 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -481,7 +481,7 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) /* check if ME wants a reset */ if (!mei_hw_is_ready(dev) && - dev->dev_state != MEI_DEV_RESETING && + dev->dev_state != MEI_DEV_RESETTING && dev->dev_state != MEI_DEV_INITIALIZING) { dev_dbg(&dev->pdev->dev, "FW not ready.\n"); mei_reset(dev, 1); diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 59159e05446c..713d89fedc46 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -33,7 +33,7 @@ const char *mei_dev_state_str(int state) MEI_DEV_STATE(INITIALIZING); MEI_DEV_STATE(INIT_CLIENTS); MEI_DEV_STATE(ENABLED); - MEI_DEV_STATE(RESETING); + MEI_DEV_STATE(RESETTING); MEI_DEV_STATE(DISABLED); MEI_DEV_STATE(POWER_DOWN); MEI_DEV_STATE(POWER_UP); @@ -146,7 +146,7 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) if (dev->dev_state != MEI_DEV_INITIALIZING) { if (dev->dev_state != MEI_DEV_DISABLED && dev->dev_state != MEI_DEV_POWER_DOWN) - dev->dev_state = MEI_DEV_RESETING; + dev->dev_state = MEI_DEV_RESETTING; mei_cl_all_disconnect(dev); diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index c91c492063aa..4de5140e7379 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -97,7 +97,7 @@ enum mei_dev_state { MEI_DEV_INITIALIZING = 0, MEI_DEV_INIT_CLIENTS, MEI_DEV_ENABLED, - MEI_DEV_RESETING, + MEI_DEV_RESETTING, MEI_DEV_DISABLED, MEI_DEV_POWER_DOWN, MEI_DEV_POWER_UP -- cgit v1.2.3 From 70135393812f4aa10aa891725786a7657064c2fc Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Tue, 23 Apr 2013 07:38:12 +0300 Subject: mei: reduce flow control only for completed messages This fixes bug when only first chunk of a large message split by hbuf_max_len is written to the hardware. All the consequent chunks will not get a new credit. A regression introduced by the commit 0ef319c93cebff9f82bdd0cdbb298f2dd00acda8 mei: streamline write complete flow function Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/interrupt.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 74730713a8d3..5ee2f07c929d 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -356,13 +356,14 @@ static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots, return -ENODEV; } - if (mei_cl_flow_ctrl_reduce(cl)) - return -ENODEV; cl->status = 0; cb->buf_idx += mei_hdr.length; - if (mei_hdr.msg_complete) + if (mei_hdr.msg_complete) { + if (mei_cl_flow_ctrl_reduce(cl)) + return -ENODEV; list_move_tail(&cb->list, &dev->write_waiting_list.list); + } return 0; } -- cgit v1.2.3 From 46e407dd349c5ffbb869f5999fa596d1e08f2810 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Tue, 23 Apr 2013 10:44:35 +0800 Subject: mei: fix krealloc() misuse in in mei_cl_irq_read_msg() If krealloc() returns NULL, it doesn't free the original. So any code of the form 'foo = krealloc(foo, ...);' is almost certainly a bug. Introduced by commit fcb136e1ac5774909e0d85189f721b8dfa800e0f(mei: fix reading large reposnes) Signed-off-by: Wei Yongjun Acked-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/interrupt.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 5ee2f07c929d..1473cfdbc426 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -148,16 +148,16 @@ static int mei_cl_irq_read_msg(struct mei_device *dev, dev_dbg(&dev->pdev->dev, "message overflow. size %d len %d idx %ld\n", cb->response_buffer.size, mei_hdr->length, cb->buf_idx); - cb->response_buffer.data = - krealloc(cb->response_buffer.data, - mei_hdr->length + cb->buf_idx, - GFP_KERNEL); + buffer = krealloc(cb->response_buffer.data, + mei_hdr->length + cb->buf_idx, + GFP_KERNEL); - if (!cb->response_buffer.data) { + if (!buffer) { dev_err(&dev->pdev->dev, "allocation failed.\n"); list_del(&cb->list); return -ENOMEM; } + cb->response_buffer.data = buffer; cb->response_buffer.size = mei_hdr->length + cb->buf_idx; } -- cgit v1.2.3 From 98097858ccf34367905067ce0af2e6d1fab27241 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 23 Apr 2013 18:30:45 +0200 Subject: misc: mark spear13xx-pcie-gadget as broken This driver was merged in 2.6.38 but never actually compiled because it depends on the header that has not made it into the kernel. Starting with Linux-3.10, this results in "allyesconfig" build errors, since spear13xx can now be enabled with the default "multiplatform" platform on ARM. Let's mark it as broken for now. If it doesn't get fixed, we can drop it completely. Cc: Pratyush Anand Cc: Randy Dunlap Cc: Jesse Barnes Cc: Viresh Kumar Cc: Shiraz Hashim Signed-off-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/misc/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 69bb79d6dd54..e29e7980a359 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -406,7 +406,7 @@ config DS1682 config SPEAR13XX_PCIE_GADGET bool "PCIe gadget support for SPEAr13XX platform" - depends on ARCH_SPEAR13XX + depends on ARCH_SPEAR13XX && BROKEN default n help This option enables gadget support for PCIe controller. If -- cgit v1.2.3