diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-30 10:21:14 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-30 10:21:14 +0200 |
commit | 45dd7af410b71da511085b806c22caf8ecca87e4 (patch) | |
tree | c04c335512353c6aa0f35d6420a6de22ae0f6c39 /drivers/usb/gadget | |
parent | 8a7b5d0f75f757fa88b0d17c19523161b27b8e80 (diff) | |
parent | 4ea438da76f4277627347147f6f7004affae07b9 (diff) | |
download | linux-45dd7af410b71da511085b806c22caf8ecca87e4.tar.bz2 |
Merge tag 'usb-for-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
Felipe writes:
usb: changes for v4.19
Not a big pull request with only 37 non-merge commits, most of which
are touching dwc2 (74% of the changes).
The most important changes are dwc2's support for uframe scheduling
and its endian-agnostic readl/writel wrappers.
From dwc3 side we have a special new glue layer for Synopsys HAPS
which will help Synopsys running FPGA validation using our upstream
driver. We also have the beginnings of dual-role support for Intel
Merrifield platform.
Apart from these, just a series of non-critical changes.
Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r-- | drivers/usb/gadget/configfs.c | 4 | ||||
-rw-r--r-- | drivers/usb/gadget/function/f_mass_storage.c | 31 | ||||
-rw-r--r-- | drivers/usb/gadget/function/f_mass_storage.h | 4 | ||||
-rw-r--r-- | drivers/usb/gadget/function/f_uvc.c | 31 | ||||
-rw-r--r-- | drivers/usb/gadget/function/f_uvc.h | 6 | ||||
-rw-r--r-- | drivers/usb/gadget/function/u_uvc.h | 5 | ||||
-rw-r--r-- | drivers/usb/gadget/function/uvc.h | 53 | ||||
-rw-r--r-- | drivers/usb/gadget/function/uvc_configfs.c | 12 | ||||
-rw-r--r-- | drivers/usb/gadget/function/uvc_queue.h | 12 | ||||
-rw-r--r-- | drivers/usb/gadget/function/uvc_v4l2.c | 3 | ||||
-rw-r--r-- | drivers/usb/gadget/function/uvc_video.h | 2 | ||||
-rw-r--r-- | drivers/usb/gadget/legacy/tcm_usb_gadget.c | 2 | ||||
-rw-r--r-- | drivers/usb/gadget/legacy/webcam.c | 4 | ||||
-rw-r--r-- | drivers/usb/gadget/udc/Kconfig | 1 | ||||
-rw-r--r-- | drivers/usb/gadget/udc/core.c | 18 | ||||
-rw-r--r-- | drivers/usb/gadget/udc/renesas_usb3.c | 84 |
16 files changed, 170 insertions, 102 deletions
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index efba66ca0719..025129942894 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -1217,8 +1217,8 @@ static void purge_configs_funcs(struct gadget_info *gi) list_move_tail(&f->list, &cfg->func_list); if (f->unbind) { dev_dbg(&gi->cdev.gadget->dev, - "unbind function '%s'/%p\n", - f->name, f); + "unbind function '%s'/%p\n", + f->name, f); f->unbind(c, f); } } diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c index acecd13dcbd9..ca8a4b53c59f 100644 --- a/drivers/usb/gadget/function/f_mass_storage.c +++ b/drivers/usb/gadget/function/f_mass_storage.c @@ -206,7 +206,6 @@ #include <linux/fcntl.h> #include <linux/file.h> #include <linux/fs.h> -#include <linux/kref.h> #include <linux/kthread.h> #include <linux/sched/signal.h> #include <linux/limits.h> @@ -312,8 +311,6 @@ struct fsg_common { void *private_data; char inquiry_string[INQUIRY_STRING_LEN]; - - struct kref ref; }; struct fsg_dev { @@ -2551,25 +2548,11 @@ static DEVICE_ATTR(file, 0, file_show, file_store); /****************************** FSG COMMON ******************************/ -static void fsg_common_release(struct kref *ref); - static void fsg_lun_release(struct device *dev) { /* Nothing needs to be done */ } -void fsg_common_get(struct fsg_common *common) -{ - kref_get(&common->ref); -} -EXPORT_SYMBOL_GPL(fsg_common_get); - -void fsg_common_put(struct fsg_common *common) -{ - kref_put(&common->ref, fsg_common_release); -} -EXPORT_SYMBOL_GPL(fsg_common_put); - static struct fsg_common *fsg_common_setup(struct fsg_common *common) { if (!common) { @@ -2582,7 +2565,6 @@ static struct fsg_common *fsg_common_setup(struct fsg_common *common) } init_rwsem(&common->filesem); spin_lock_init(&common->lock); - kref_init(&common->ref); init_completion(&common->thread_notifier); init_waitqueue_head(&common->io_wait); init_waitqueue_head(&common->fsg_wait); @@ -2870,9 +2852,8 @@ void fsg_common_set_inquiry_string(struct fsg_common *common, const char *vn, } EXPORT_SYMBOL_GPL(fsg_common_set_inquiry_string); -static void fsg_common_release(struct kref *ref) +static void fsg_common_release(struct fsg_common *common) { - struct fsg_common *common = container_of(ref, struct fsg_common, ref); int i; /* If the thread isn't already dead, tell it to exit now */ @@ -3308,7 +3289,9 @@ static ssize_t fsg_opts_num_buffers_store(struct config_item *item, if (ret) goto end; - fsg_common_set_num_buffers(opts->common, num); + ret = fsg_common_set_num_buffers(opts->common, num); + if (ret) + goto end; ret = len; end: @@ -3344,7 +3327,7 @@ static void fsg_free_inst(struct usb_function_instance *fi) struct fsg_opts *opts; opts = fsg_opts_from_func_inst(fi); - fsg_common_put(opts->common); + fsg_common_release(opts->common); kfree(opts); } @@ -3368,7 +3351,7 @@ static struct usb_function_instance *fsg_alloc_inst(void) rc = fsg_common_set_num_buffers(opts->common, CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS); if (rc) - goto release_opts; + goto release_common; pr_info(FSG_DRIVER_DESC ", version: " FSG_DRIVER_VERSION "\n"); @@ -3391,6 +3374,8 @@ static struct usb_function_instance *fsg_alloc_inst(void) release_buffers: fsg_common_free_buffers(opts->common); +release_common: + kfree(opts->common); release_opts: kfree(opts); return ERR_PTR(rc); diff --git a/drivers/usb/gadget/function/f_mass_storage.h b/drivers/usb/gadget/function/f_mass_storage.h index 58857fcf199f..3b8c4ce2a40a 100644 --- a/drivers/usb/gadget/function/f_mass_storage.h +++ b/drivers/usb/gadget/function/f_mass_storage.h @@ -115,10 +115,6 @@ fsg_opts_from_func_inst(const struct usb_function_instance *fi) return container_of(fi, struct fsg_opts, func_inst); } -void fsg_common_get(struct fsg_common *common); - -void fsg_common_put(struct fsg_common *common); - void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs); int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n); diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c index 439eba660e95..d8ce7868fe22 100644 --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -6,16 +6,17 @@ * Laurent Pinchart (laurent.pinchart@ideasonboard.com) */ -#include <linux/kernel.h> -#include <linux/module.h> #include <linux/device.h> #include <linux/errno.h> #include <linux/fs.h> +#include <linux/kernel.h> #include <linux/list.h> +#include <linux/module.h> #include <linux/mutex.h> #include <linux/string.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> +#include <linux/usb/g_uvc.h> #include <linux/usb/video.h> #include <linux/vmalloc.h> #include <linux/wait.h> @@ -30,6 +31,8 @@ #include "uvc_video.h" unsigned int uvc_gadget_trace_param; +module_param_named(trace, uvc_gadget_trace_param, uint, 0644); +MODULE_PARM_DESC(trace, "Trace level bitmask"); /* -------------------------------------------------------------------------- * Function descriptors @@ -410,10 +413,21 @@ uvc_function_disconnect(struct uvc_device *uvc) * USB probe and disconnect */ +static ssize_t function_name_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct uvc_device *uvc = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", uvc->func.fi->group.cg_item.ci_name); +} + +static DEVICE_ATTR_RO(function_name); + static int uvc_register_video(struct uvc_device *uvc) { struct usb_composite_dev *cdev = uvc->func.config->cdev; + int ret; /* TODO reference counting. */ uvc->vdev.v4l2_dev = &uvc->v4l2_dev; @@ -426,7 +440,17 @@ uvc_register_video(struct uvc_device *uvc) video_set_drvdata(&uvc->vdev, uvc); - return video_register_device(&uvc->vdev, VFL_TYPE_GRABBER, -1); + ret = video_register_device(&uvc->vdev, VFL_TYPE_GRABBER, -1); + if (ret < 0) + return ret; + + ret = device_create_file(&uvc->vdev.dev, &dev_attr_function_name); + if (ret < 0) { + video_unregister_device(&uvc->vdev); + return ret; + } + + return 0; } #define UVC_COPY_DESCRIPTOR(mem, dst, desc) \ @@ -864,6 +888,7 @@ static void uvc_unbind(struct usb_configuration *c, struct usb_function *f) INFO(cdev, "%s\n", __func__); + device_remove_file(&uvc->vdev.dev, &dev_attr_function_name); video_unregister_device(&uvc->vdev); v4l2_device_unregister(&uvc->v4l2_dev); diff --git a/drivers/usb/gadget/function/f_uvc.h b/drivers/usb/gadget/function/f_uvc.h index 81defe4557fe..a81a17765558 100644 --- a/drivers/usb/gadget/function/f_uvc.h +++ b/drivers/usb/gadget/function/f_uvc.h @@ -9,10 +9,7 @@ #ifndef _F_UVC_H_ #define _F_UVC_H_ -#include <linux/usb/composite.h> -#include <linux/usb/video.h> - -#include "uvc.h" +struct uvc_device; void uvc_function_setup_continue(struct uvc_device *uvc); @@ -21,4 +18,3 @@ void uvc_function_connect(struct uvc_device *uvc); void uvc_function_disconnect(struct uvc_device *uvc); #endif /* _F_UVC_H_ */ - diff --git a/drivers/usb/gadget/function/u_uvc.h b/drivers/usb/gadget/function/u_uvc.h index d00d3ded71c0..2ed292e94fbc 100644 --- a/drivers/usb/gadget/function/u_uvc.h +++ b/drivers/usb/gadget/function/u_uvc.h @@ -13,6 +13,7 @@ #ifndef U_UVC_H #define U_UVC_H +#include <linux/mutex.h> #include <linux/usb/composite.h> #include <linux/usb/video.h> @@ -20,7 +21,6 @@ struct f_uvc_opts { struct usb_function_instance func_inst; - unsigned int uvc_gadget_trace_param; unsigned int streaming_interval; unsigned int streaming_maxpacket; unsigned int streaming_maxburst; @@ -80,7 +80,4 @@ struct f_uvc_opts { int refcnt; }; -void uvc_set_trace_param(unsigned int trace); - #endif /* U_UVC_H */ - diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h index a64e07e61f8c..93cf78b420fe 100644 --- a/drivers/usb/gadget/function/uvc.h +++ b/drivers/usb/gadget/function/uvc.h @@ -9,52 +9,26 @@ #ifndef _UVC_GADGET_H_ #define _UVC_GADGET_H_ -#include <linux/ioctl.h> -#include <linux/types.h> -#include <linux/usb/ch9.h> - -#define UVC_EVENT_FIRST (V4L2_EVENT_PRIVATE_START + 0) -#define UVC_EVENT_CONNECT (V4L2_EVENT_PRIVATE_START + 0) -#define UVC_EVENT_DISCONNECT (V4L2_EVENT_PRIVATE_START + 1) -#define UVC_EVENT_STREAMON (V4L2_EVENT_PRIVATE_START + 2) -#define UVC_EVENT_STREAMOFF (V4L2_EVENT_PRIVATE_START + 3) -#define UVC_EVENT_SETUP (V4L2_EVENT_PRIVATE_START + 4) -#define UVC_EVENT_DATA (V4L2_EVENT_PRIVATE_START + 5) -#define UVC_EVENT_LAST (V4L2_EVENT_PRIVATE_START + 5) - -struct uvc_request_data { - __s32 length; - __u8 data[60]; -}; +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/spinlock.h> +#include <linux/usb/composite.h> +#include <linux/videodev2.h> -struct uvc_event { - union { - enum usb_device_speed speed; - struct usb_ctrlrequest req; - struct uvc_request_data data; - }; -}; +#include <media/v4l2-device.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-fh.h> -#define UVCIOC_SEND_RESPONSE _IOW('U', 1, struct uvc_request_data) +#include "uvc_queue.h" -#define UVC_INTF_CONTROL 0 -#define UVC_INTF_STREAMING 1 +struct usb_ep; +struct usb_request; +struct uvc_descriptor_header; /* ------------------------------------------------------------------------ * Debugging, printing and logging */ -#ifdef __KERNEL__ - -#include <linux/usb.h> /* For usb_endpoint_* */ -#include <linux/usb/composite.h> -#include <linux/usb/gadget.h> -#include <linux/videodev2.h> -#include <media/v4l2-fh.h> -#include <media/v4l2-device.h> - -#include "uvc_queue.h" - #define UVC_TRACE_PROBE (1 << 0) #define UVC_TRACE_DESCR (1 << 1) #define UVC_TRACE_CONTROL (1 << 2) @@ -184,7 +158,4 @@ extern void uvc_endpoint_stream(struct uvc_device *dev); extern void uvc_function_connect(struct uvc_device *uvc); extern void uvc_function_disconnect(struct uvc_device *uvc); -#endif /* __KERNEL__ */ - #endif /* _UVC_GADGET_H_ */ - diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c index c9b8cc4aae5a..b51f0d278826 100644 --- a/drivers/usb/gadget/function/uvc_configfs.c +++ b/drivers/usb/gadget/function/uvc_configfs.c @@ -31,7 +31,11 @@ static struct configfs_attribute prefix##attr_##cname = { \ .show = prefix##cname##_show, \ } -static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item); +static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item) +{ + return container_of(to_config_group(item), struct f_uvc_opts, + func_inst.group); +} /* control/header/<NAME> */ DECLARE_UVC_HEADER_DESCRIPTOR(1); @@ -2105,12 +2109,6 @@ static const struct config_item_type uvcg_streaming_grp_type = { .ct_owner = THIS_MODULE, }; -static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item) -{ - return container_of(to_config_group(item), struct f_uvc_opts, - func_inst.group); -} - static void uvc_attr_release(struct config_item *item) { struct f_uvc_opts *opts = to_f_uvc_opts(item); diff --git a/drivers/usb/gadget/function/uvc_queue.h b/drivers/usb/gadget/function/uvc_queue.h index f9f65b5c1062..2f0fff769843 100644 --- a/drivers/usb/gadget/function/uvc_queue.h +++ b/drivers/usb/gadget/function/uvc_queue.h @@ -2,13 +2,15 @@ #ifndef _UVC_QUEUE_H_ #define _UVC_QUEUE_H_ -#ifdef __KERNEL__ - -#include <linux/kernel.h> +#include <linux/list.h> #include <linux/poll.h> -#include <linux/videodev2.h> +#include <linux/spinlock.h> + #include <media/videobuf2-v4l2.h> +struct file; +struct mutex; + /* Maximum frame size in bytes, for sanity checking. */ #define UVC_MAX_FRAME_SIZE (16*1024*1024) /* Maximum number of video buffers. */ @@ -91,7 +93,5 @@ struct uvc_buffer *uvcg_queue_next_buffer(struct uvc_video_queue *queue, struct uvc_buffer *uvcg_queue_head(struct uvc_video_queue *queue); -#endif /* __KERNEL__ */ - #endif /* _UVC_QUEUE_H_ */ diff --git a/drivers/usb/gadget/function/uvc_v4l2.c b/drivers/usb/gadget/function/uvc_v4l2.c index 9a9019625496..7f1ca3b57823 100644 --- a/drivers/usb/gadget/function/uvc_v4l2.c +++ b/drivers/usb/gadget/function/uvc_v4l2.c @@ -6,10 +6,11 @@ * Laurent Pinchart (laurent.pinchart@ideasonboard.com) */ -#include <linux/kernel.h> #include <linux/device.h> #include <linux/errno.h> +#include <linux/kernel.h> #include <linux/list.h> +#include <linux/usb/g_uvc.h> #include <linux/videodev2.h> #include <linux/vmalloc.h> #include <linux/wait.h> diff --git a/drivers/usb/gadget/function/uvc_video.h b/drivers/usb/gadget/function/uvc_video.h index 6c20aa75f966..7d77122b0ff9 100644 --- a/drivers/usb/gadget/function/uvc_video.h +++ b/drivers/usb/gadget/function/uvc_video.h @@ -12,6 +12,8 @@ #ifndef __UVC_VIDEO_H__ #define __UVC_VIDEO_H__ +struct uvc_video; + int uvcg_video_pump(struct uvc_video *video); int uvcg_video_enable(struct uvc_video *video, int enable); diff --git a/drivers/usb/gadget/legacy/tcm_usb_gadget.c b/drivers/usb/gadget/legacy/tcm_usb_gadget.c index 682bf99dcf76..40870227999a 100644 --- a/drivers/usb/gadget/legacy/tcm_usb_gadget.c +++ b/drivers/usb/gadget/legacy/tcm_usb_gadget.c @@ -41,7 +41,7 @@ static struct usb_device_descriptor usbg_device_desc = { #define USB_G_STR_CONFIG USB_GADGET_FIRST_AVAIL_IDX static struct usb_string usbg_us_strings[] = { - [USB_GADGET_MANUFACTURER_IDX].s = "Target Manufactor", + [USB_GADGET_MANUFACTURER_IDX].s = "Target Manufacturer", [USB_GADGET_PRODUCT_IDX].s = "Target Product", [USB_GADGET_SERIAL_IDX].s = "000000000001", [USB_G_STR_CONFIG].s = "default config", diff --git a/drivers/usb/gadget/legacy/webcam.c b/drivers/usb/gadget/legacy/webcam.c index 6b86568c9157..a9f8eb8e1c76 100644 --- a/drivers/usb/gadget/legacy/webcam.c +++ b/drivers/usb/gadget/legacy/webcam.c @@ -30,9 +30,6 @@ static unsigned int streaming_maxburst; module_param(streaming_maxburst, uint, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(streaming_maxburst, "0 - 15 (ss only)"); -static unsigned int trace; -module_param(trace, uint, S_IRUGO|S_IWUSR); -MODULE_PARM_DESC(trace, "Trace level bitmask"); /* -------------------------------------------------------------------------- * Device descriptor */ @@ -379,7 +376,6 @@ webcam_bind(struct usb_composite_dev *cdev) uvc_opts->streaming_interval = streaming_interval; uvc_opts->streaming_maxpacket = streaming_maxpacket; uvc_opts->streaming_maxburst = streaming_maxburst; - uvc_set_trace_param(trace); uvc_opts->fs_control = uvc_fs_control_cls; uvc_opts->ss_control = uvc_ss_control_cls; diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig index 1df4dedffe86..0a16cbd4e528 100644 --- a/drivers/usb/gadget/udc/Kconfig +++ b/drivers/usb/gadget/udc/Kconfig @@ -193,6 +193,7 @@ config USB_RENESAS_USB3 tristate 'Renesas USB3.0 Peripheral controller' depends on ARCH_RENESAS || COMPILE_TEST depends on EXTCON + select USB_ROLE_SWITCH help Renesas USB3.0 Peripheral controller is a USB peripheral controller that supports super, high, and full speed USB 3.0 data transfers. diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index cab5e4f09924..af88b48c1cea 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -87,6 +87,8 @@ EXPORT_SYMBOL_GPL(usb_ep_set_maxpacket_limit); * configurable, with more generic names like "ep-a". (remember that for * USB, "in" means "towards the USB master".) * + * This routine must be called in process context. + * * returns zero, or a negative error code. */ int usb_ep_enable(struct usb_ep *ep) @@ -119,6 +121,8 @@ EXPORT_SYMBOL_GPL(usb_ep_enable); * gadget drivers must call usb_ep_enable() again before queueing * requests to the endpoint. * + * This routine must be called in process context. + * * returns zero, or a negative error code. */ int usb_ep_disable(struct usb_ep *ep) @@ -241,6 +245,8 @@ EXPORT_SYMBOL_GPL(usb_ep_free_request); * Note that @req's ->complete() callback must never be called from * within usb_ep_queue() as that can create deadlock situations. * + * This routine may be called in interrupt context. + * * Returns zero, or a negative error code. Endpoints that are not enabled * report errors; errors will also be * reported when the usb peripheral is disconnected. @@ -284,6 +290,8 @@ EXPORT_SYMBOL_GPL(usb_ep_queue); * at the head of the queue) except as part of disconnecting from usb. Such * restrictions prevent drivers from supporting configuration changes, * even to configuration zero (a "chapter 9" requirement). + * + * This routine may be called in interrupt context. */ int usb_ep_dequeue(struct usb_ep *ep, struct usb_request *req) { @@ -311,6 +319,8 @@ EXPORT_SYMBOL_GPL(usb_ep_dequeue); * current altsetting, see usb_ep_clear_halt(). When switching altsettings, * it's simplest to use usb_ep_enable() or usb_ep_disable() for the endpoints. * + * This routine may be called in interrupt context. + * * Returns zero, or a negative error code. On success, this call sets * underlying hardware state that blocks data transfers. * Attempts to halt IN endpoints will fail (returning -EAGAIN) if any @@ -336,6 +346,8 @@ EXPORT_SYMBOL_GPL(usb_ep_set_halt); * for endpoints that aren't reconfigured, after clearing any other state * in the endpoint's i/o queue. * + * This routine may be called in interrupt context. + * * Returns zero, or a negative error code. On success, this call clears * the underlying hardware state reflecting endpoint halt and data toggle. * Note that some hardware can't support this request (like pxa2xx_udc), @@ -360,6 +372,8 @@ EXPORT_SYMBOL_GPL(usb_ep_clear_halt); * requests. If the gadget driver clears the halt status, it will * automatically unwedge the endpoint. * + * This routine may be called in interrupt context. + * * Returns zero on success, else negative errno. */ int usb_ep_set_wedge(struct usb_ep *ep) @@ -388,6 +402,8 @@ EXPORT_SYMBOL_GPL(usb_ep_set_wedge); * written OUT to it by the host. Drivers that need precise handling for * fault reporting or recovery may need to use this call. * + * This routine may be called in interrupt context. + * * This returns the number of such bytes in the fifo, or a negative * errno if the endpoint doesn't use a FIFO or doesn't support such * precise handling. @@ -415,6 +431,8 @@ EXPORT_SYMBOL_GPL(usb_ep_fifo_status); * an endpoint fifo after abnormal transaction terminations. The call * must never be used except when endpoint is not being used for any * protocol translation. + * + * This routine may be called in interrupt context. */ void usb_ep_fifo_flush(struct usb_ep *ep) { diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 7cf98c793e04..1f879b3f2c96 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -23,6 +23,8 @@ #include <linux/uaccess.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> +#include <linux/usb/of.h> +#include <linux/usb/role.h> /* register definitions */ #define USB3_AXI_INT_STA 0x008 @@ -335,6 +337,11 @@ struct renesas_usb3 { struct phy *phy; struct dentry *dentry; + struct usb_role_switch *role_sw; + struct device *host_dev; + struct work_struct role_work; + enum usb_role role; + struct renesas_usb3_ep *usb3_ep; int num_usb3_eps; @@ -651,6 +658,14 @@ static void usb3_check_vbus(struct renesas_usb3 *usb3) } } +static void renesas_usb3_role_work(struct work_struct *work) +{ + struct renesas_usb3 *usb3 = + container_of(work, struct renesas_usb3, role_work); + + usb_role_switch_set_role(usb3->role_sw, usb3->role); +} + static void usb3_set_mode(struct renesas_usb3 *usb3, bool host) { if (host) @@ -659,6 +674,16 @@ static void usb3_set_mode(struct renesas_usb3 *usb3, bool host) usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON); } +static void usb3_set_mode_by_role_sw(struct renesas_usb3 *usb3, bool host) +{ + if (usb3->role_sw) { + usb3->role = host ? USB_ROLE_HOST : USB_ROLE_DEVICE; + schedule_work(&usb3->role_work); + } else { + usb3_set_mode(usb3, host); + } +} + static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable) { if (enable) @@ -672,7 +697,7 @@ static void usb3_mode_config(struct renesas_usb3 *usb3, bool host, bool a_dev) unsigned long flags; spin_lock_irqsave(&usb3->lock, flags); - usb3_set_mode(usb3, host); + usb3_set_mode_by_role_sw(usb3, host); usb3_vbus_out(usb3, a_dev); /* for A-Peripheral or forced B-device mode */ if ((!host && a_dev) || @@ -2302,6 +2327,41 @@ static const struct usb_gadget_ops renesas_usb3_gadget_ops = { .set_selfpowered = renesas_usb3_set_selfpowered, }; +static enum usb_role renesas_usb3_role_switch_get(struct device *dev) +{ + struct renesas_usb3 *usb3 = dev_get_drvdata(dev); + enum usb_role cur_role; + + pm_runtime_get_sync(dev); + cur_role = usb3_is_host(usb3) ? USB_ROLE_HOST : USB_ROLE_DEVICE; + pm_runtime_put(dev); + + return cur_role; +} + +static int renesas_usb3_role_switch_set(struct device *dev, + enum usb_role role) +{ + struct renesas_usb3 *usb3 = dev_get_drvdata(dev); + struct device *host = usb3->host_dev; + enum usb_role cur_role = renesas_usb3_role_switch_get(dev); + + pm_runtime_get_sync(dev); + if (cur_role == USB_ROLE_HOST && role == USB_ROLE_DEVICE) { + device_release_driver(host); + usb3_set_mode(usb3, false); + } else if (cur_role == USB_ROLE_DEVICE && role == USB_ROLE_HOST) { + /* Must set the mode before device_attach of the host */ + usb3_set_mode(usb3, true); + /* This device_attach() might sleep */ + if (device_attach(host) < 0) + dev_err(dev, "device_attach(host) failed\n"); + } + pm_runtime_put(dev); + + return 0; +} + static ssize_t role_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { @@ -2405,6 +2465,8 @@ static int renesas_usb3_remove(struct platform_device *pdev) debugfs_remove_recursive(usb3->dentry); device_remove_file(&pdev->dev, &dev_attr_role); + usb_role_switch_unregister(usb3->role_sw); + usb_del_gadget_udc(&usb3->gadget); renesas_usb3_dma_free_prd(usb3, &pdev->dev); @@ -2562,6 +2624,12 @@ static const unsigned int renesas_usb3_cable[] = { EXTCON_NONE, }; +static const struct usb_role_switch_desc renesas_usb3_role_switch_desc = { + .set = renesas_usb3_role_switch_set, + .get = renesas_usb3_role_switch_get, + .allow_userspace_control = true, +}; + static int renesas_usb3_probe(struct platform_device *pdev) { struct renesas_usb3 *usb3; @@ -2647,6 +2715,20 @@ static int renesas_usb3_probe(struct platform_device *pdev) if (ret < 0) goto err_dev_create; + INIT_WORK(&usb3->role_work, renesas_usb3_role_work); + usb3->role_sw = usb_role_switch_register(&pdev->dev, + &renesas_usb3_role_switch_desc); + if (!IS_ERR(usb3->role_sw)) { + usb3->host_dev = usb_of_get_companion_dev(&pdev->dev); + if (!usb3->host_dev) { + /* If not found, this driver will not use a role sw */ + usb_role_switch_unregister(usb3->role_sw); + usb3->role_sw = NULL; + } + } else { + usb3->role_sw = NULL; + } + usb3->workaround_for_vbus = priv->workaround_for_vbus; renesas_usb3_debugfs_init(usb3, &pdev->dev); |