summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/Kconfig21
-rw-r--r--drivers/ata/Makefile2
-rw-r--r--drivers/ata/ahci.c24
-rw-r--r--drivers/ata/ata_piix.c17
-rw-r--r--drivers/ata/libata-acpi.c177
-rw-r--r--drivers/ata/libata-core.c66
-rw-r--r--drivers/ata/libata-eh.c27
-rw-r--r--drivers/ata/libata-scsi.c20
-rw-r--r--drivers/ata/libata-zpodd.c299
-rw-r--r--drivers/ata/libata.h27
-rw-r--r--drivers/ata/pata_samsung_cf.c4
-rw-r--r--drivers/ata/sata_rcar.c910
-rw-r--r--drivers/scsi/scsi_lib.c14
-rw-r--r--drivers/scsi/sr.c46
14 files changed, 1517 insertions, 137 deletions
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 4cfb7200260d..3e751b74615e 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -58,6 +58,19 @@ config ATA_ACPI
You can disable this at kernel boot time by using the
option libata.noacpi=1
+config SATA_ZPODD
+ bool "SATA Zero Power ODD Support"
+ depends on ATA_ACPI
+ default n
+ help
+ This option adds support for SATA ZPODD. It requires both
+ ODD and the platform support, and if enabled, will automatically
+ power on/off the ODD when certain condition is satisfied. This
+ does not impact user's experience of the ODD, only power is saved
+ when ODD is not in use(i.e. no disc inside).
+
+ If unsure, say N.
+
config SATA_PMP
bool "SATA Port Multiplier support"
default y
@@ -247,6 +260,14 @@ config SATA_PROMISE
If unsure, say N.
+config SATA_RCAR
+ tristate "Renesas R-Car SATA support"
+ depends on ARCH_SHMOBILE && ARCH_R8A7779
+ help
+ This option enables support for Renesas R-Car Serial ATA.
+
+ If unsure, say N.
+
config SATA_SIL
tristate "Silicon Image SATA support"
depends on PCI
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 9329dafba91b..c04d0fd038a3 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_ATA_PIIX) += ata_piix.o
obj-$(CONFIG_SATA_MV) += sata_mv.o
obj-$(CONFIG_SATA_NV) += sata_nv.o
obj-$(CONFIG_SATA_PROMISE) += sata_promise.o
+obj-$(CONFIG_SATA_RCAR) += sata_rcar.o
obj-$(CONFIG_SATA_SIL) += sata_sil.o
obj-$(CONFIG_SATA_SIS) += sata_sis.o
obj-$(CONFIG_SATA_SVW) += sata_svw.o
@@ -107,3 +108,4 @@ libata-y := libata-core.o libata-scsi.o libata-eh.o libata-transport.o
libata-$(CONFIG_ATA_SFF) += libata-sff.o
libata-$(CONFIG_SATA_PMP) += libata-pmp.o
libata-$(CONFIG_ATA_ACPI) += libata-acpi.o
+libata-$(CONFIG_SATA_ZPODD) += libata-zpodd.o
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 495aeed26779..a99112cfd8b1 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -265,6 +265,30 @@ static const struct pci_device_id ahci_pci_tbl[] = {
{ PCI_VDEVICE(INTEL, 0x9c07), board_ahci }, /* Lynx Point-LP RAID */
{ PCI_VDEVICE(INTEL, 0x9c0e), board_ahci }, /* Lynx Point-LP RAID */
{ PCI_VDEVICE(INTEL, 0x9c0f), board_ahci }, /* Lynx Point-LP RAID */
+ { PCI_VDEVICE(INTEL, 0x1f22), board_ahci }, /* Avoton AHCI */
+ { PCI_VDEVICE(INTEL, 0x1f23), board_ahci }, /* Avoton AHCI */
+ { PCI_VDEVICE(INTEL, 0x1f24), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f25), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f26), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f27), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f2e), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f2f), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f32), board_ahci }, /* Avoton AHCI */
+ { PCI_VDEVICE(INTEL, 0x1f33), board_ahci }, /* Avoton AHCI */
+ { PCI_VDEVICE(INTEL, 0x1f34), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f35), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f36), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f37), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f3e), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x1f3f), board_ahci }, /* Avoton RAID */
+ { PCI_VDEVICE(INTEL, 0x8d02), board_ahci }, /* Wellsburg AHCI */
+ { PCI_VDEVICE(INTEL, 0x8d04), board_ahci }, /* Wellsburg RAID */
+ { PCI_VDEVICE(INTEL, 0x8d06), board_ahci }, /* Wellsburg RAID */
+ { PCI_VDEVICE(INTEL, 0x8d0e), board_ahci }, /* Wellsburg RAID */
+ { PCI_VDEVICE(INTEL, 0x8d62), board_ahci }, /* Wellsburg AHCI */
+ { PCI_VDEVICE(INTEL, 0x8d64), board_ahci }, /* Wellsburg RAID */
+ { PCI_VDEVICE(INTEL, 0x8d66), board_ahci }, /* Wellsburg RAID */
+ { PCI_VDEVICE(INTEL, 0x8d6e), board_ahci }, /* Wellsburg RAID */
/* JMicron 360/1/3/5/6, match class to avoid IDE function */
{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 174eca609b42..d2ba439cfe54 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -317,6 +317,23 @@ static const struct pci_device_id piix_pci_tbl[] = {
{ 0x8086, 0x9c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
/* SATA Controller IDE (DH89xxCC) */
{ 0x8086, 0x2326, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Avoton) */
+ { 0x8086, 0x1f20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Avoton) */
+ { 0x8086, 0x1f21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Avoton) */
+ { 0x8086, 0x1f30, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Avoton) */
+ { 0x8086, 0x1f31, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Wellsburg) */
+ { 0x8086, 0x8d00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Wellsburg) */
+ { 0x8086, 0x8d08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Wellsburg) */
+ { 0x8086, 0x8d60, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Wellsburg) */
+ { 0x8086, 0x8d68, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+
{ } /* terminate list */
};
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 6fc67f7efb22..0ea1018280bd 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -17,6 +17,7 @@
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
+#include <linux/pm_qos.h>
#include <scsi/scsi_device.h>
#include "libata.h"
@@ -835,50 +836,95 @@ void ata_acpi_on_resume(struct ata_port *ap)
}
}
-/**
- * ata_acpi_set_state - set the port power state
- * @ap: target ATA port
- * @state: state, on/off
- *
- * This function executes the _PS0/_PS3 ACPI method to set the power state.
- * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
- */
-void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
+static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime)
+{
+ int d_max_in = ACPI_STATE_D3_COLD;
+ if (!runtime)
+ goto out;
+
+ /*
+ * For ATAPI, runtime D3 cold is only allowed
+ * for ZPODD in zero power ready state
+ */
+ if (dev->class == ATA_DEV_ATAPI &&
+ !(zpodd_dev_enabled(dev) && zpodd_zpready(dev)))
+ d_max_in = ACPI_STATE_D3_HOT;
+
+out:
+ return acpi_pm_device_sleep_state(&dev->sdev->sdev_gendev,
+ NULL, d_max_in);
+}
+
+static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state)
{
+ bool runtime = PMSG_IS_AUTO(state);
struct ata_device *dev;
acpi_handle handle;
int acpi_state;
- /* channel first and then drives for power on and vica versa
- for power off */
- handle = ata_ap_acpi_handle(ap);
- if (handle && state.event == PM_EVENT_ON)
- acpi_bus_set_power(handle, ACPI_STATE_D0);
-
ata_for_each_dev(dev, &ap->link, ENABLED) {
handle = ata_dev_acpi_handle(dev);
if (!handle)
continue;
- if (state.event != PM_EVENT_ON) {
- acpi_state = acpi_pm_device_sleep_state(
- &dev->sdev->sdev_gendev, NULL, ACPI_STATE_D3);
- if (acpi_state > 0)
- acpi_bus_set_power(handle, acpi_state);
- /* TBD: need to check if it's runtime pm request */
- acpi_pm_device_run_wake(
- &dev->sdev->sdev_gendev, true);
+ if (!(state.event & PM_EVENT_RESUME)) {
+ acpi_state = ata_acpi_choose_suspend_state(dev, runtime);
+ if (acpi_state == ACPI_STATE_D0)
+ continue;
+ if (runtime && zpodd_dev_enabled(dev) &&
+ acpi_state == ACPI_STATE_D3_COLD)
+ zpodd_enable_run_wake(dev);
+ acpi_bus_set_power(handle, acpi_state);
} else {
- /* Ditto */
- acpi_pm_device_run_wake(
- &dev->sdev->sdev_gendev, false);
+ if (runtime && zpodd_dev_enabled(dev))
+ zpodd_disable_run_wake(dev);
acpi_bus_set_power(handle, ACPI_STATE_D0);
}
}
+}
- handle = ata_ap_acpi_handle(ap);
- if (handle && state.event != PM_EVENT_ON)
- acpi_bus_set_power(handle, ACPI_STATE_D3);
+/* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */
+static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state)
+{
+ struct ata_device *dev;
+ acpi_handle port_handle;
+
+ port_handle = ata_ap_acpi_handle(ap);
+ if (!port_handle)
+ return;
+
+ /* channel first and then drives for power on and vica versa
+ for power off */
+ if (state.event & PM_EVENT_RESUME)
+ acpi_bus_set_power(port_handle, ACPI_STATE_D0);
+
+ ata_for_each_dev(dev, &ap->link, ENABLED) {
+ acpi_handle dev_handle = ata_dev_acpi_handle(dev);
+ if (!dev_handle)
+ continue;
+
+ acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ?
+ ACPI_STATE_D0 : ACPI_STATE_D3);
+ }
+
+ if (!(state.event & PM_EVENT_RESUME))
+ acpi_bus_set_power(port_handle, ACPI_STATE_D3);
+}
+
+/**
+ * ata_acpi_set_state - set the port power state
+ * @ap: target ATA port
+ * @state: state, on/off
+ *
+ * This function sets a proper ACPI D state for the device on
+ * system and runtime PM operations.
+ */
+void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
+{
+ if (ap->flags & ATA_FLAG_ACPI_SATA)
+ sata_acpi_set_state(ap, state);
+ else
+ pata_acpi_set_state(ap, state);
}
/**
@@ -974,57 +1020,6 @@ void ata_acpi_on_disable(struct ata_device *dev)
ata_acpi_clear_gtf(dev);
}
-static void ata_acpi_wake_dev(acpi_handle handle, u32 event, void *context)
-{
- struct ata_device *ata_dev = context;
-
- if (event == ACPI_NOTIFY_DEVICE_WAKE && ata_dev &&
- pm_runtime_suspended(&ata_dev->sdev->sdev_gendev))
- scsi_autopm_get_device(ata_dev->sdev);
-}
-
-static void ata_acpi_add_pm_notifier(struct ata_device *dev)
-{
- struct acpi_device *acpi_dev;
- acpi_handle handle;
- acpi_status status;
-
- handle = ata_dev_acpi_handle(dev);
- if (!handle)
- return;
-
- status = acpi_bus_get_device(handle, &acpi_dev);
- if (ACPI_FAILURE(status))
- return;
-
- if (dev->sdev->can_power_off) {
- acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
- ata_acpi_wake_dev, dev);
- device_set_run_wake(&dev->sdev->sdev_gendev, true);
- }
-}
-
-static void ata_acpi_remove_pm_notifier(struct ata_device *dev)
-{
- struct acpi_device *acpi_dev;
- acpi_handle handle;
- acpi_status status;
-
- handle = ata_dev_acpi_handle(dev);
- if (!handle)
- return;
-
- status = acpi_bus_get_device(handle, &acpi_dev);
- if (ACPI_FAILURE(status))
- return;
-
- if (dev->sdev->can_power_off) {
- device_set_run_wake(&dev->sdev->sdev_gendev, false);
- acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
- ata_acpi_wake_dev);
- }
-}
-
static void ata_acpi_register_power_resource(struct ata_device *dev)
{
struct scsi_device *sdev = dev->sdev;
@@ -1047,13 +1042,13 @@ static void ata_acpi_unregister_power_resource(struct ata_device *dev)
void ata_acpi_bind(struct ata_device *dev)
{
- ata_acpi_add_pm_notifier(dev);
ata_acpi_register_power_resource(dev);
+ if (zpodd_dev_enabled(dev))
+ dev_pm_qos_expose_flags(&dev->sdev->sdev_gendev, 0);
}
void ata_acpi_unbind(struct ata_device *dev)
{
- ata_acpi_remove_pm_notifier(dev);
ata_acpi_unregister_power_resource(dev);
}
@@ -1095,9 +1090,6 @@ static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev,
acpi_handle *handle)
{
struct ata_device *ata_dev;
- acpi_status status;
- struct acpi_device *acpi_dev;
- struct acpi_device_power_state *states;
if (ap->flags & ATA_FLAG_ACPI_SATA) {
if (!sata_pmp_attached(ap))
@@ -1114,21 +1106,6 @@ static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev,
if (!*handle)
return -ENODEV;
- status = acpi_bus_get_device(*handle, &acpi_dev);
- if (ACPI_FAILURE(status))
- return 0;
-
- /*
- * If firmware has _PS3 or _PR3 for this device,
- * and this ata ODD device support device attention,
- * it means this device can be powered off
- */
- states = acpi_dev->power.states;
- if ((states[ACPI_STATE_D3_HOT].flags.valid ||
- states[ACPI_STATE_D3_COLD].flags.explicit_set) &&
- ata_dev->flags & ATA_DFLAG_DA)
- sdev->can_power_off = 1;
-
return 0;
}
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 46cd3f4c6aaa..497adea1f0d6 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2400,8 +2400,10 @@ int ata_dev_configure(struct ata_device *dev)
dma_dir_string = ", DMADIR";
}
- if (ata_id_has_da(dev->id))
+ if (ata_id_has_da(dev->id)) {
dev->flags |= ATA_DFLAG_DA;
+ zpodd_init(dev);
+ }
/* print device info to dmesg */
if (ata_msg_drv(ap) && print_info)
@@ -5331,9 +5333,6 @@ static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
static int __ata_port_suspend_common(struct ata_port *ap, pm_message_t mesg, int *async)
{
- unsigned int ehi_flags = ATA_EHI_QUIET;
- int rc;
-
/*
* On some hardware, device fails to respond after spun down
* for suspend. As the device won't be used before being
@@ -5342,11 +5341,9 @@ static int __ata_port_suspend_common(struct ata_port *ap, pm_message_t mesg, int
*
* http://thread.gmane.org/gmane.linux.ide/46764
*/
- if (mesg.event == PM_EVENT_SUSPEND)
- ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
-
- rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, async);
- return rc;
+ unsigned int ehi_flags = ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY |
+ ATA_EHI_NO_RECOVERY;
+ return ata_port_request_pm(ap, mesg, 0, ehi_flags, async);
}
static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
@@ -5367,40 +5364,38 @@ static int ata_port_suspend(struct device *dev)
static int ata_port_do_freeze(struct device *dev)
{
if (pm_runtime_suspended(dev))
- pm_runtime_resume(dev);
+ return 0;
return ata_port_suspend_common(dev, PMSG_FREEZE);
}
static int ata_port_poweroff(struct device *dev)
{
- if (pm_runtime_suspended(dev))
- return 0;
-
return ata_port_suspend_common(dev, PMSG_HIBERNATE);
}
-static int __ata_port_resume_common(struct ata_port *ap, int *async)
+static int __ata_port_resume_common(struct ata_port *ap, pm_message_t mesg,
+ int *async)
{
int rc;
- rc = ata_port_request_pm(ap, PMSG_ON, ATA_EH_RESET,
+ rc = ata_port_request_pm(ap, mesg, ATA_EH_RESET,
ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, async);
return rc;
}
-static int ata_port_resume_common(struct device *dev)
+static int ata_port_resume_common(struct device *dev, pm_message_t mesg)
{
struct ata_port *ap = to_ata_port(dev);
- return __ata_port_resume_common(ap, NULL);
+ return __ata_port_resume_common(ap, mesg, NULL);
}
static int ata_port_resume(struct device *dev)
{
int rc;
- rc = ata_port_resume_common(dev);
+ rc = ata_port_resume_common(dev, PMSG_RESUME);
if (!rc) {
pm_runtime_disable(dev);
pm_runtime_set_active(dev);
@@ -5410,11 +5405,40 @@ static int ata_port_resume(struct device *dev)
return rc;
}
+/*
+ * For ODDs, the upper layer will poll for media change every few seconds,
+ * which will make it enter and leave suspend state every few seconds. And
+ * as each suspend will cause a hard/soft reset, the gain of runtime suspend
+ * is very little and the ODD may malfunction after constantly being reset.
+ * So the idle callback here will not proceed to suspend if a non-ZPODD capable
+ * ODD is attached to the port.
+ */
static int ata_port_runtime_idle(struct device *dev)
{
+ struct ata_port *ap = to_ata_port(dev);
+ struct ata_link *link;
+ struct ata_device *adev;
+
+ ata_for_each_link(link, ap, HOST_FIRST) {
+ ata_for_each_dev(adev, link, ENABLED)
+ if (adev->class == ATA_DEV_ATAPI &&
+ !zpodd_dev_enabled(adev))
+ return -EBUSY;
+ }
+
return pm_runtime_suspend(dev);
}
+static int ata_port_runtime_suspend(struct device *dev)
+{
+ return ata_port_suspend_common(dev, PMSG_AUTO_SUSPEND);
+}
+
+static int ata_port_runtime_resume(struct device *dev)
+{
+ return ata_port_resume_common(dev, PMSG_AUTO_RESUME);
+}
+
static const struct dev_pm_ops ata_port_pm_ops = {
.suspend = ata_port_suspend,
.resume = ata_port_resume,
@@ -5423,8 +5447,8 @@ static const struct dev_pm_ops ata_port_pm_ops = {
.poweroff = ata_port_poweroff,
.restore = ata_port_resume,
- .runtime_suspend = ata_port_suspend,
- .runtime_resume = ata_port_resume_common,
+ .runtime_suspend = ata_port_runtime_suspend,
+ .runtime_resume = ata_port_runtime_resume,
.runtime_idle = ata_port_runtime_idle,
};
@@ -5441,7 +5465,7 @@ EXPORT_SYMBOL_GPL(ata_sas_port_async_suspend);
int ata_sas_port_async_resume(struct ata_port *ap, int *async)
{
- return __ata_port_resume_common(ap, async);
+ return __ata_port_resume_common(ap, PMSG_RESUME, async);
}
EXPORT_SYMBOL_GPL(ata_sas_port_async_resume);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index bcf4437214f5..f9476fb3ac43 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1591,7 +1591,7 @@ static int ata_eh_read_log_10h(struct ata_device *dev,
* RETURNS:
* 0 on success, AC_ERR_* mask on failure.
*/
-static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key)
+unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key)
{
u8 cdb[ATAPI_CDB_LEN] = { TEST_UNIT_READY, 0, 0, 0, 0, 0 };
struct ata_taskfile tf;
@@ -1624,7 +1624,7 @@ static unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key)
* RETURNS:
* 0 on success, AC_ERR_* mask on failure
*/
-static unsigned int atapi_eh_request_sense(struct ata_device *dev,
+unsigned int atapi_eh_request_sense(struct ata_device *dev,
u8 *sense_buf, u8 dfl_sense_key)
{
u8 cdb[ATAPI_CDB_LEN] =
@@ -3857,6 +3857,8 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
rc = atapi_eh_clear_ua(dev);
if (rc)
goto rest_fail;
+ if (zpodd_dev_enabled(dev))
+ zpodd_post_poweron(dev);
}
}
@@ -4022,11 +4024,12 @@ static void ata_eh_handle_port_suspend(struct ata_port *ap)
{
unsigned long flags;
int rc = 0;
+ struct ata_device *dev;
/* are we suspending? */
spin_lock_irqsave(ap->lock, flags);
if (!(ap->pflags & ATA_PFLAG_PM_PENDING) ||
- ap->pm_mesg.event == PM_EVENT_ON) {
+ ap->pm_mesg.event & PM_EVENT_RESUME) {
spin_unlock_irqrestore(ap->lock, flags);
return;
}
@@ -4034,6 +4037,18 @@ static void ata_eh_handle_port_suspend(struct ata_port *ap)
WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED);
+ /*
+ * If we have a ZPODD attached, check its zero
+ * power ready status before the port is frozen.
+ * Only needed for runtime suspend.
+ */
+ if (PMSG_IS_AUTO(ap->pm_mesg)) {
+ ata_for_each_dev(dev, &ap->link, ENABLED) {
+ if (zpodd_dev_enabled(dev))
+ zpodd_on_suspend(dev);
+ }
+ }
+
/* tell ACPI we're suspending */
rc = ata_acpi_on_suspend(ap);
if (rc)
@@ -4045,7 +4060,7 @@ static void ata_eh_handle_port_suspend(struct ata_port *ap)
if (ap->ops->port_suspend)
rc = ap->ops->port_suspend(ap, ap->pm_mesg);
- ata_acpi_set_state(ap, PMSG_SUSPEND);
+ ata_acpi_set_state(ap, ap->pm_mesg);
out:
/* report result */
spin_lock_irqsave(ap->lock, flags);
@@ -4085,7 +4100,7 @@ static void ata_eh_handle_port_resume(struct ata_port *ap)
/* are we resuming? */
spin_lock_irqsave(ap->lock, flags);
if (!(ap->pflags & ATA_PFLAG_PM_PENDING) ||
- ap->pm_mesg.event != PM_EVENT_ON) {
+ !(ap->pm_mesg.event & PM_EVENT_RESUME)) {
spin_unlock_irqrestore(ap->lock, flags);
return;
}
@@ -4104,7 +4119,7 @@ static void ata_eh_handle_port_resume(struct ata_port *ap)
ata_for_each_dev(dev, link, ALL)
ata_ering_clear(&dev->ering);
- ata_acpi_set_state(ap, PMSG_ON);
+ ata_acpi_set_state(ap, ap->pm_mesg);
if (ap->ops->port_resume)
rc = ap->ops->port_resume(ap);
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 7c337e754dab..318b41358187 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -933,7 +933,11 @@ static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
* block specified for the ATA pass through commands. Regardless
* of whether the command errored or not, return a sense
* block. Copy all controller registers into the sense
- * block. Clear sense key, ASC & ASCQ if there is no error.
+ * block. If there was no error, we get the request from an ATA
+ * passthrough command, so we use the following sense data:
+ * sk = RECOVERED ERROR
+ * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
+ *
*
* LOCKING:
* None.
@@ -959,6 +963,10 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
&sb[1], &sb[2], &sb[3], verbose);
sb[1] &= 0x0f;
+ } else {
+ sb[1] = RECOVERED_ERROR;
+ sb[2] = 0;
+ sb[3] = 0x1D;
}
/*
@@ -1733,10 +1741,12 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
/* For ATA pass thru (SAT) commands, generate a sense block if
* user mandated it or if there's an error. Note that if we
- * generate because the user forced us to, a check condition
- * is generated and the ATA register values are returned
+ * generate because the user forced us to [CK_COND =1], a check
+ * condition is generated and the ATA register values are returned
* whether the command completed successfully or not. If there
- * was no error, SK, ASC and ASCQ will all be zero.
+ * was no error, we use the following sense data:
+ * sk = RECOVERED ERROR
+ * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
*/
if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
((cdb[2] & 0x20) || need_sense)) {
@@ -3755,6 +3765,8 @@ static void ata_scsi_remove_dev(struct ata_device *dev)
mutex_lock(&ap->scsi_host->scan_mutex);
spin_lock_irqsave(ap->lock, flags);
+ if (zpodd_dev_enabled(dev))
+ zpodd_exit(dev);
ata_acpi_unbind(dev);
/* clearing dev->sdev is protected by host lock */
diff --git a/drivers/ata/libata-zpodd.c b/drivers/ata/libata-zpodd.c
new file mode 100644
index 000000000000..90b159b740b3
--- /dev/null
+++ b/drivers/ata/libata-zpodd.c
@@ -0,0 +1,299 @@
+#include <linux/libata.h>
+#include <linux/cdrom.h>
+#include <linux/pm_runtime.h>
+#include <linux/module.h>
+#include <scsi/scsi_device.h>
+
+#include "libata.h"
+
+static int zpodd_poweroff_delay = 30; /* 30 seconds for power off delay */
+module_param(zpodd_poweroff_delay, int, 0644);
+MODULE_PARM_DESC(zpodd_poweroff_delay, "Poweroff delay for ZPODD in seconds");
+
+enum odd_mech_type {
+ ODD_MECH_TYPE_SLOT,
+ ODD_MECH_TYPE_DRAWER,
+ ODD_MECH_TYPE_UNSUPPORTED,
+};
+
+struct zpodd {
+ enum odd_mech_type mech_type; /* init during probe, RO afterwards */
+ struct ata_device *dev;
+
+ /* The following fields are synchronized by PM core. */
+ bool from_notify; /* resumed as a result of
+ * acpi wake notification */
+ bool zp_ready; /* ZP ready state */
+ unsigned long last_ready; /* last ZP ready timestamp */
+ bool zp_sampled; /* ZP ready state sampled */
+ bool powered_off; /* ODD is powered off
+ * during suspend */
+};
+
+static int eject_tray(struct ata_device *dev)
+{
+ struct ata_taskfile tf = {};
+ const char cdb[] = { GPCMD_START_STOP_UNIT,
+ 0, 0, 0,
+ 0x02, /* LoEj */
+ 0, 0, 0, 0, 0, 0, 0,
+ };
+
+ tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+ tf.command = ATA_CMD_PACKET;
+ tf.protocol = ATAPI_PROT_NODATA;
+
+ return ata_exec_internal(dev, &tf, cdb, DMA_NONE, NULL, 0, 0);
+}
+
+/* Per the spec, only slot type and drawer type ODD can be supported */
+static enum odd_mech_type zpodd_get_mech_type(struct ata_device *dev)
+{
+ char buf[16];
+ unsigned int ret;
+ struct rm_feature_desc *desc = (void *)(buf + 8);
+ struct ata_taskfile tf = {};
+
+ char cdb[] = { GPCMD_GET_CONFIGURATION,
+ 2, /* only 1 feature descriptor requested */
+ 0, 3, /* 3, removable medium feature */
+ 0, 0, 0,/* reserved */
+ 0, sizeof(buf),
+ 0, 0, 0,
+ };
+
+ tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+ tf.command = ATA_CMD_PACKET;
+ tf.protocol = ATAPI_PROT_PIO;
+ tf.lbam = sizeof(buf);
+
+ ret = ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE,
+ buf, sizeof(buf), 0);
+ if (ret)
+ return ODD_MECH_TYPE_UNSUPPORTED;
+
+ if (be16_to_cpu(desc->feature_code) != 3)
+ return ODD_MECH_TYPE_UNSUPPORTED;
+
+ if (desc->mech_type == 0 && desc->load == 0 && desc->eject == 1)
+ return ODD_MECH_TYPE_SLOT;
+ else if (desc->mech_type == 1 && desc->load == 0 && desc->eject == 1)
+ return ODD_MECH_TYPE_DRAWER;
+ else
+ return ODD_MECH_TYPE_UNSUPPORTED;
+}
+
+static bool odd_can_poweroff(struct ata_device *ata_dev)
+{
+ acpi_handle handle;
+ acpi_status status;
+ struct acpi_device *acpi_dev;
+
+ handle = ata_dev_acpi_handle(ata_dev);
+ if (!handle)
+ return false;
+
+ status = acpi_bus_get_device(handle, &acpi_dev);
+ if (ACPI_FAILURE(status))
+ return false;
+
+ return acpi_device_can_poweroff(acpi_dev);
+}
+
+/* Test if ODD is zero power ready by sense code */
+static bool zpready(struct ata_device *dev)
+{
+ u8 sense_key, *sense_buf;
+ unsigned int ret, asc, ascq, add_len;
+ struct zpodd *zpodd = dev->zpodd;
+
+ ret = atapi_eh_tur(dev, &sense_key);
+
+ if (!ret || sense_key != NOT_READY)
+ return false;
+
+ sense_buf = dev->link->ap->sector_buf;
+ ret = atapi_eh_request_sense(dev, sense_buf, sense_key);
+ if (ret)
+ return false;
+
+ /* sense valid */
+ if ((sense_buf[0] & 0x7f) != 0x70)
+ return false;
+
+ add_len = sense_buf[7];
+ /* has asc and ascq */
+ if (add_len < 6)
+ return false;
+
+ asc = sense_buf[12];
+ ascq = sense_buf[13];
+
+ if (zpodd->mech_type == ODD_MECH_TYPE_SLOT)
+ /* no media inside */
+ return asc == 0x3a;
+ else
+ /* no media inside and door closed */
+ return asc == 0x3a && ascq == 0x01;
+}
+
+/*
+ * Update the zpodd->zp_ready field. This field will only be set
+ * if the ODD has stayed in ZP ready state for zpodd_poweroff_delay
+ * time, and will be used to decide if power off is allowed. If it
+ * is set, it will be cleared during resume from powered off state.
+ */
+void zpodd_on_suspend(struct ata_device *dev)
+{
+ struct zpodd *zpodd = dev->zpodd;
+ unsigned long expires;
+
+ if (!zpready(dev)) {
+ zpodd->zp_sampled = false;
+ zpodd->zp_ready = false;
+ return;
+ }
+
+ if (!zpodd->zp_sampled) {
+ zpodd->zp_sampled = true;
+ zpodd->last_ready = jiffies;
+ return;
+ }
+
+ expires = zpodd->last_ready +
+ msecs_to_jiffies(zpodd_poweroff_delay * 1000);
+ if (time_before(jiffies, expires))
+ return;
+
+ zpodd->zp_ready = true;
+}
+
+bool zpodd_zpready(struct ata_device *dev)
+{
+ struct zpodd *zpodd = dev->zpodd;
+ return zpodd->zp_ready;
+}
+
+/*
+ * Enable runtime wake capability through ACPI and set the powered_off flag,
+ * this flag will be used during resume to decide what operations are needed
+ * to take.
+ *
+ * Also, media poll needs to be silenced, so that it doesn't bring the ODD
+ * back to full power state every few seconds.
+ */
+void zpodd_enable_run_wake(struct ata_device *dev)
+{
+ struct zpodd *zpodd = dev->zpodd;
+
+ sdev_disable_disk_events(dev->sdev);
+
+ zpodd->powered_off = true;
+ device_set_run_wake(&dev->sdev->sdev_gendev, true);
+ acpi_pm_device_run_wake(&dev->sdev->sdev_gendev, true);
+}
+
+/* Disable runtime wake capability if it is enabled */
+void zpodd_disable_run_wake(struct ata_device *dev)
+{
+ struct zpodd *zpodd = dev->zpodd;
+
+ if (zpodd->powered_off) {
+ acpi_pm_device_run_wake(&dev->sdev->sdev_gendev, false);
+ device_set_run_wake(&dev->sdev->sdev_gendev, false);
+ }
+}
+
+/*
+ * Post power on processing after the ODD has been recovered. If the
+ * ODD wasn't powered off during suspend, it doesn't do anything.
+ *
+ * For drawer type ODD, if it is powered on due to user pressed the
+ * eject button, the tray needs to be ejected. This can only be done
+ * after the ODD has been recovered, i.e. link is initialized and
+ * device is able to process NON_DATA PIO command, as eject needs to
+ * send command for the ODD to process.
+ *
+ * The from_notify flag set in wake notification handler function
+ * zpodd_wake_dev represents if power on is due to user's action.
+ *
+ * For both types of ODD, several fields need to be reset.
+ */
+void zpodd_post_poweron(struct ata_device *dev)
+{
+ struct zpodd *zpodd = dev->zpodd;
+
+ if (!zpodd->powered_off)
+ return;
+
+ zpodd->powered_off = false;
+
+ if (zpodd->from_notify) {
+ zpodd->from_notify = false;
+ if (zpodd->mech_type == ODD_MECH_TYPE_DRAWER)
+ eject_tray(dev);
+ }
+
+ zpodd->zp_sampled = false;
+ zpodd->zp_ready = false;
+
+ sdev_enable_disk_events(dev->sdev);
+}
+
+static void zpodd_wake_dev(acpi_handle handle, u32 event, void *context)
+{
+ struct ata_device *ata_dev = context;
+ struct zpodd *zpodd = ata_dev->zpodd;
+ struct device *dev = &ata_dev->sdev->sdev_gendev;
+
+ if (event == ACPI_NOTIFY_DEVICE_WAKE && pm_runtime_suspended(dev)) {
+ zpodd->from_notify = true;
+ pm_runtime_resume(dev);
+ }
+}
+
+static void ata_acpi_add_pm_notifier(struct ata_device *dev)
+{
+ acpi_handle handle = ata_dev_acpi_handle(dev);
+ acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
+ zpodd_wake_dev, dev);
+}
+
+static void ata_acpi_remove_pm_notifier(struct ata_device *dev)
+{
+ acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->sdev->sdev_gendev);
+ acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, zpodd_wake_dev);
+}
+
+void zpodd_init(struct ata_device *dev)
+{
+ enum odd_mech_type mech_type;
+ struct zpodd *zpodd;
+
+ if (dev->zpodd)
+ return;
+
+ if (!odd_can_poweroff(dev))
+ return;
+
+ mech_type = zpodd_get_mech_type(dev);
+ if (mech_type == ODD_MECH_TYPE_UNSUPPORTED)
+ return;
+
+ zpodd = kzalloc(sizeof(struct zpodd), GFP_KERNEL);
+ if (!zpodd)
+ return;
+
+ zpodd->mech_type = mech_type;
+
+ ata_acpi_add_pm_notifier(dev);
+ zpodd->dev = dev;
+ dev->zpodd = zpodd;
+}
+
+void zpodd_exit(struct ata_device *dev)
+{
+ ata_acpi_remove_pm_notifier(dev);
+ kfree(dev->zpodd);
+ dev->zpodd = NULL;
+}
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 7148a58020b9..c949dd311b2e 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -182,6 +182,9 @@ extern void ata_eh_finish(struct ata_port *ap);
extern int ata_ering_map(struct ata_ering *ering,
int (*map_fn)(struct ata_ering_entry *, void *),
void *arg);
+extern unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key);
+extern unsigned int atapi_eh_request_sense(struct ata_device *dev,
+ u8 *sense_buf, u8 dfl_sense_key);
/* libata-pmp.c */
#ifdef CONFIG_SATA_PMP
@@ -230,4 +233,28 @@ static inline void ata_sff_exit(void)
{ }
#endif /* CONFIG_ATA_SFF */
+/* libata-zpodd.c */
+#ifdef CONFIG_SATA_ZPODD
+void zpodd_init(struct ata_device *dev);
+void zpodd_exit(struct ata_device *dev);
+static inline bool zpodd_dev_enabled(struct ata_device *dev)
+{
+ return dev->zpodd != NULL;
+}
+void zpodd_on_suspend(struct ata_device *dev);
+bool zpodd_zpready(struct ata_device *dev);
+void zpodd_enable_run_wake(struct ata_device *dev);
+void zpodd_disable_run_wake(struct ata_device *dev);
+void zpodd_post_poweron(struct ata_device *dev);
+#else /* CONFIG_SATA_ZPODD */
+static inline void zpodd_init(struct ata_device *dev) {}
+static inline void zpodd_exit(struct ata_device *dev) {}
+static inline bool zpodd_dev_enabled(struct ata_device *dev) { return false; }
+static inline void zpodd_on_suspend(struct ata_device *dev) {}
+static inline bool zpodd_zpready(struct ata_device *dev) { return false; }
+static inline void zpodd_enable_run_wake(struct ata_device *dev) {}
+static inline void zpodd_disable_run_wake(struct ata_device *dev) {}
+static inline void zpodd_post_poweron(struct ata_device *dev) {}
+#endif /* CONFIG_SATA_ZPODD */
+
#endif /* __LIBATA_H__ */
diff --git a/drivers/ata/pata_samsung_cf.c b/drivers/ata/pata_samsung_cf.c
index 63ffb002ec67..70b0e01372b3 100644
--- a/drivers/ata/pata_samsung_cf.c
+++ b/drivers/ata/pata_samsung_cf.c
@@ -512,7 +512,7 @@ static int __init pata_s3c_probe(struct platform_device *pdev)
return -ENOMEM;
}
- info->clk = clk_get(&pdev->dev, "cfcon");
+ info->clk = devm_clk_get(&pdev->dev, "cfcon");
if (IS_ERR(info->clk)) {
dev_err(dev, "failed to get access to cf controller clock\n");
ret = PTR_ERR(info->clk);
@@ -589,7 +589,6 @@ static int __init pata_s3c_probe(struct platform_device *pdev)
stop_clk:
clk_disable(info->clk);
- clk_put(info->clk);
return ret;
}
@@ -601,7 +600,6 @@ static int __exit pata_s3c_remove(struct platform_device *pdev)
ata_host_detach(host);
clk_disable(info->clk);
- clk_put(info->clk);
return 0;
}
diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c
new file mode 100644
index 000000000000..caf33f620c35
--- /dev/null
+++ b/drivers/ata/sata_rcar.c
@@ -0,0 +1,910 @@
+/*
+ * Renesas R-Car SATA driver
+ *
+ * Author: Vladimir Barinov <source@cogentembedded.com>
+ * Copyright (C) 2013 Cogent Embedded, Inc.
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/ata.h>
+#include <linux/libata.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+#define DRV_NAME "sata_rcar"
+
+/* SH-Navi2G/ATAPI-ATA compatible task registers */
+#define DATA_REG 0x100
+#define SDEVCON_REG 0x138
+
+/* SH-Navi2G/ATAPI module compatible control registers */
+#define ATAPI_CONTROL1_REG 0x180
+#define ATAPI_STATUS_REG 0x184
+#define ATAPI_INT_ENABLE_REG 0x188
+#define ATAPI_DTB_ADR_REG 0x198
+#define ATAPI_DMA_START_ADR_REG 0x19C
+#define ATAPI_DMA_TRANS_CNT_REG 0x1A0
+#define ATAPI_CONTROL2_REG 0x1A4
+#define ATAPI_SIG_ST_REG 0x1B0
+#define ATAPI_BYTE_SWAP_REG 0x1BC
+
+/* ATAPI control 1 register (ATAPI_CONTROL1) bits */
+#define ATAPI_CONTROL1_ISM BIT(16)
+#define ATAPI_CONTROL1_DTA32M BIT(11)
+#define ATAPI_CONTROL1_RESET BIT(7)
+#define ATAPI_CONTROL1_DESE BIT(3)
+#define ATAPI_CONTROL1_RW BIT(2)
+#define ATAPI_CONTROL1_STOP BIT(1)
+#define ATAPI_CONTROL1_START BIT(0)
+
+/* ATAPI status register (ATAPI_STATUS) bits */
+#define ATAPI_STATUS_SATAINT BIT(11)
+#define ATAPI_STATUS_DNEND BIT(6)
+#define ATAPI_STATUS_DEVTRM BIT(5)
+#define ATAPI_STATUS_DEVINT BIT(4)
+#define ATAPI_STATUS_ERR BIT(2)
+#define ATAPI_STATUS_NEND BIT(1)
+#define ATAPI_STATUS_ACT BIT(0)
+
+/* Interrupt enable register (ATAPI_INT_ENABLE) bits */
+#define ATAPI_INT_ENABLE_SATAINT BIT(11)
+#define ATAPI_INT_ENABLE_DNEND BIT(6)
+#define ATAPI_INT_ENABLE_DEVTRM BIT(5)
+#define ATAPI_INT_ENABLE_DEVINT BIT(4)
+#define ATAPI_INT_ENABLE_ERR BIT(2)
+#define ATAPI_INT_ENABLE_NEND BIT(1)
+#define ATAPI_INT_ENABLE_ACT BIT(0)
+
+/* Access control registers for physical layer control register */
+#define SATAPHYADDR_REG 0x200
+#define SATAPHYWDATA_REG 0x204
+#define SATAPHYACCEN_REG 0x208
+#define SATAPHYRESET_REG 0x20C
+#define SATAPHYRDATA_REG 0x210
+#define SATAPHYACK_REG 0x214
+
+/* Physical layer control address command register (SATAPHYADDR) bits */
+#define SATAPHYADDR_PHYRATEMODE BIT(10)
+#define SATAPHYADDR_PHYCMD_READ BIT(9)
+#define SATAPHYADDR_PHYCMD_WRITE BIT(8)
+
+/* Physical layer control enable register (SATAPHYACCEN) bits */
+#define SATAPHYACCEN_PHYLANE BIT(0)
+
+/* Physical layer control reset register (SATAPHYRESET) bits */
+#define SATAPHYRESET_PHYRST BIT(1)
+#define SATAPHYRESET_PHYSRES BIT(0)
+
+/* Physical layer control acknowledge register (SATAPHYACK) bits */
+#define SATAPHYACK_PHYACK BIT(0)
+
+/* Serial-ATA HOST control registers */
+#define BISTCONF_REG 0x102C
+#define SDATA_REG 0x1100
+#define SSDEVCON_REG 0x1204
+
+#define SCRSSTS_REG 0x1400
+#define SCRSERR_REG 0x1404
+#define SCRSCON_REG 0x1408
+#define SCRSACT_REG 0x140C
+
+#define SATAINTSTAT_REG 0x1508
+#define SATAINTMASK_REG 0x150C
+
+/* SATA INT status register (SATAINTSTAT) bits */
+#define SATAINTSTAT_SERR BIT(3)
+#define SATAINTSTAT_ATA BIT(0)
+
+/* SATA INT mask register (SATAINTSTAT) bits */
+#define SATAINTMASK_SERRMSK BIT(3)
+#define SATAINTMASK_ERRMSK BIT(2)
+#define SATAINTMASK_ERRCRTMSK BIT(1)
+#define SATAINTMASK_ATAMSK BIT(0)
+
+#define SATA_RCAR_INT_MASK (SATAINTMASK_SERRMSK | \
+ SATAINTMASK_ATAMSK)
+
+/* Physical Layer Control Registers */
+#define SATAPCTLR1_REG 0x43
+#define SATAPCTLR2_REG 0x52
+#define SATAPCTLR3_REG 0x5A
+#define SATAPCTLR4_REG 0x60
+
+/* Descriptor table word 0 bit (when DTA32M = 1) */
+#define SATA_RCAR_DTEND BIT(0)
+
+struct sata_rcar_priv {
+ void __iomem *base;
+ struct clk *clk;
+};
+
+static void sata_rcar_phy_initialize(struct sata_rcar_priv *priv)
+{
+ /* idle state */
+ iowrite32(0, priv->base + SATAPHYADDR_REG);
+ /* reset */
+ iowrite32(SATAPHYRESET_PHYRST, priv->base + SATAPHYRESET_REG);
+ udelay(10);
+ /* deassert reset */
+ iowrite32(0, priv->base + SATAPHYRESET_REG);
+}
+
+static void sata_rcar_phy_write(struct sata_rcar_priv *priv, u16 reg, u32 val,
+ int group)
+{
+ int timeout;
+
+ /* deassert reset */
+ iowrite32(0, priv->base + SATAPHYRESET_REG);
+ /* lane 1 */
+ iowrite32(SATAPHYACCEN_PHYLANE, priv->base + SATAPHYACCEN_REG);
+ /* write phy register value */
+ iowrite32(val, priv->base + SATAPHYWDATA_REG);
+ /* set register group */
+ if (group)
+ reg |= SATAPHYADDR_PHYRATEMODE;
+ /* write command */
+ iowrite32(SATAPHYADDR_PHYCMD_WRITE | reg, priv->base + SATAPHYADDR_REG);
+ /* wait for ack */
+ for (timeout = 0; timeout < 100; timeout++) {
+ val = ioread32(priv->base + SATAPHYACK_REG);
+ if (val & SATAPHYACK_PHYACK)
+ break;
+ }
+ if (timeout >= 100)
+ pr_err("%s timeout\n", __func__);
+ /* idle state */
+ iowrite32(0, priv->base + SATAPHYADDR_REG);
+}
+
+static void sata_rcar_freeze(struct ata_port *ap)
+{
+ struct sata_rcar_priv *priv = ap->host->private_data;
+
+ /* mask */
+ iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
+
+ ata_sff_freeze(ap);
+}
+
+static void sata_rcar_thaw(struct ata_port *ap)
+{
+ struct sata_rcar_priv *priv = ap->host->private_data;
+
+ /* ack */
+ iowrite32(~SATA_RCAR_INT_MASK, priv->base + SATAINTSTAT_REG);
+
+ ata_sff_thaw(ap);
+
+ /* unmask */
+ iowrite32(0x7ff & ~SATA_RCAR_INT_MASK, priv->base + SATAINTMASK_REG);
+}
+
+static void sata_rcar_ioread16_rep(void __iomem *reg, void *buffer, int count)
+{
+ u16 *ptr = buffer;
+
+ while (count--) {
+ u16 data = ioread32(reg);
+
+ *ptr++ = data;
+ }
+}
+
+static void sata_rcar_iowrite16_rep(void __iomem *reg, void *buffer, int count)
+{
+ const u16 *ptr = buffer;
+
+ while (count--)
+ iowrite32(*ptr++, reg);
+}
+
+static u8 sata_rcar_check_status(struct ata_port *ap)
+{
+ return ioread32(ap->ioaddr.status_addr);
+}
+
+static u8 sata_rcar_check_altstatus(struct ata_port *ap)
+{
+ return ioread32(ap->ioaddr.altstatus_addr);
+}
+
+static void sata_rcar_set_devctl(struct ata_port *ap, u8 ctl)
+{
+ iowrite32(ctl, ap->ioaddr.ctl_addr);
+}
+
+static void sata_rcar_dev_select(struct ata_port *ap, unsigned int device)
+{
+ iowrite32(ATA_DEVICE_OBS, ap->ioaddr.device_addr);
+ ata_sff_pause(ap); /* needed; also flushes, for mmio */
+}
+
+static unsigned int sata_rcar_ata_devchk(struct ata_port *ap,
+ unsigned int device)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+ u8 nsect, lbal;
+
+ sata_rcar_dev_select(ap, device);
+
+ iowrite32(0x55, ioaddr->nsect_addr);
+ iowrite32(0xaa, ioaddr->lbal_addr);
+
+ iowrite32(0xaa, ioaddr->nsect_addr);
+ iowrite32(0x55, ioaddr->lbal_addr);
+
+ iowrite32(0x55, ioaddr->nsect_addr);
+ iowrite32(0xaa, ioaddr->lbal_addr);
+
+ nsect = ioread32(ioaddr->nsect_addr);
+ lbal = ioread32(ioaddr->lbal_addr);
+
+ if (nsect == 0x55 && lbal == 0xaa)
+ return 1; /* found a device */
+
+ return 0; /* nothing found */
+}
+
+static int sata_rcar_wait_after_reset(struct ata_link *link,
+ unsigned long deadline)
+{
+ struct ata_port *ap = link->ap;
+
+ ata_msleep(ap, ATA_WAIT_AFTER_RESET);
+
+ return ata_sff_wait_ready(link, deadline);
+}
+
+static int sata_rcar_bus_softreset(struct ata_port *ap, unsigned long deadline)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+
+ DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
+
+ /* software reset. causes dev0 to be selected */
+ iowrite32(ap->ctl, ioaddr->ctl_addr);
+ udelay(20);
+ iowrite32(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
+ udelay(20);
+ iowrite32(ap->ctl, ioaddr->ctl_addr);
+ ap->last_ctl = ap->ctl;
+
+ /* wait the port to become ready */
+ return sata_rcar_wait_after_reset(&ap->link, deadline);
+}
+
+static int sata_rcar_softreset(struct ata_link *link, unsigned int *classes,
+ unsigned long deadline)
+{
+ struct ata_port *ap = link->ap;
+ unsigned int devmask = 0;
+ int rc;
+ u8 err;
+
+ /* determine if device 0 is present */
+ if (sata_rcar_ata_devchk(ap, 0))
+ devmask |= 1 << 0;
+
+ /* issue bus reset */
+ DPRINTK("about to softreset, devmask=%x\n", devmask);
+ rc = sata_rcar_bus_softreset(ap, deadline);
+ /* if link is occupied, -ENODEV too is an error */
+ if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
+ ata_link_err(link, "SRST failed (errno=%d)\n", rc);
+ return rc;
+ }
+
+ /* determine by signature whether we have ATA or ATAPI devices */
+ classes[0] = ata_sff_dev_classify(&link->device[0], devmask, &err);
+
+ DPRINTK("classes[0]=%u\n", classes[0]);
+ return 0;
+}
+
+static void sata_rcar_tf_load(struct ata_port *ap,
+ const struct ata_taskfile *tf)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+ unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
+
+ if (tf->ctl != ap->last_ctl) {
+ iowrite32(tf->ctl, ioaddr->ctl_addr);
+ ap->last_ctl = tf->ctl;
+ ata_wait_idle(ap);
+ }
+
+ if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
+ iowrite32(tf->hob_feature, ioaddr->feature_addr);
+ iowrite32(tf->hob_nsect, ioaddr->nsect_addr);
+ iowrite32(tf->hob_lbal, ioaddr->lbal_addr);
+ iowrite32(tf->hob_lbam, ioaddr->lbam_addr);
+ iowrite32(tf->hob_lbah, ioaddr->lbah_addr);
+ VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
+ tf->hob_feature,
+ tf->hob_nsect,
+ tf->hob_lbal,
+ tf->hob_lbam,
+ tf->hob_lbah);
+ }
+
+ if (is_addr) {
+ iowrite32(tf->feature, ioaddr->feature_addr);
+ iowrite32(tf->nsect, ioaddr->nsect_addr);
+ iowrite32(tf->lbal, ioaddr->lbal_addr);
+ iowrite32(tf->lbam, ioaddr->lbam_addr);
+ iowrite32(tf->lbah, ioaddr->lbah_addr);
+ VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
+ tf->feature,
+ tf->nsect,
+ tf->lbal,
+ tf->lbam,
+ tf->lbah);
+ }
+
+ if (tf->flags & ATA_TFLAG_DEVICE) {
+ iowrite32(tf->device, ioaddr->device_addr);
+ VPRINTK("device 0x%X\n", tf->device);
+ }
+
+ ata_wait_idle(ap);
+}
+
+static void sata_rcar_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+
+ tf->command = sata_rcar_check_status(ap);
+ tf->feature = ioread32(ioaddr->error_addr);
+ tf->nsect = ioread32(ioaddr->nsect_addr);
+ tf->lbal = ioread32(ioaddr->lbal_addr);
+ tf->lbam = ioread32(ioaddr->lbam_addr);
+ tf->lbah = ioread32(ioaddr->lbah_addr);
+ tf->device = ioread32(ioaddr->device_addr);
+
+ if (tf->flags & ATA_TFLAG_LBA48) {
+ iowrite32(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
+ tf->hob_feature = ioread32(ioaddr->error_addr);
+ tf->hob_nsect = ioread32(ioaddr->nsect_addr);
+ tf->hob_lbal = ioread32(ioaddr->lbal_addr);
+ tf->hob_lbam = ioread32(ioaddr->lbam_addr);
+ tf->hob_lbah = ioread32(ioaddr->lbah_addr);
+ iowrite32(tf->ctl, ioaddr->ctl_addr);
+ ap->last_ctl = tf->ctl;
+ }
+}
+
+static void sata_rcar_exec_command(struct ata_port *ap,
+ const struct ata_taskfile *tf)
+{
+ DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
+
+ iowrite32(tf->command, ap->ioaddr.command_addr);
+ ata_sff_pause(ap);
+}
+
+static unsigned int sata_rcar_data_xfer(struct ata_device *dev,
+ unsigned char *buf,
+ unsigned int buflen, int rw)
+{
+ struct ata_port *ap = dev->link->ap;
+ void __iomem *data_addr = ap->ioaddr.data_addr;
+ unsigned int words = buflen >> 1;
+
+ /* Transfer multiple of 2 bytes */
+ if (rw == READ)
+ sata_rcar_ioread16_rep(data_addr, buf, words);
+ else
+ sata_rcar_iowrite16_rep(data_addr, buf, words);
+
+ /* Transfer trailing byte, if any. */
+ if (unlikely(buflen & 0x01)) {
+ unsigned char pad[2] = { };
+
+ /* Point buf to the tail of buffer */
+ buf += buflen - 1;
+
+ /*
+ * Use io*16_rep() accessors here as well to avoid pointlessly
+ * swapping bytes to and from on the big endian machines...
+ */
+ if (rw == READ) {
+ sata_rcar_ioread16_rep(data_addr, pad, 1);
+ *buf = pad[0];
+ } else {
+ pad[0] = *buf;
+ sata_rcar_iowrite16_rep(data_addr, pad, 1);
+ }
+ words++;
+ }
+
+ return words << 1;
+}
+
+static void sata_rcar_drain_fifo(struct ata_queued_cmd *qc)
+{
+ int count;
+ struct ata_port *ap;
+
+ /* We only need to flush incoming data when a command was running */
+ if (qc == NULL || qc->dma_dir == DMA_TO_DEVICE)
+ return;
+
+ ap = qc->ap;
+ /* Drain up to 64K of data before we give up this recovery method */
+ for (count = 0; (ap->ops->sff_check_status(ap) & ATA_DRQ) &&
+ count < 65536; count += 2)
+ ioread32(ap->ioaddr.data_addr);
+
+ /* Can become DEBUG later */
+ if (count)
+ ata_port_dbg(ap, "drained %d bytes to clear DRQ\n", count);
+}
+
+static int sata_rcar_scr_read(struct ata_link *link, unsigned int sc_reg,
+ u32 *val)
+{
+ if (sc_reg > SCR_ACTIVE)
+ return -EINVAL;
+
+ *val = ioread32(link->ap->ioaddr.scr_addr + (sc_reg << 2));
+ return 0;
+}
+
+static int sata_rcar_scr_write(struct ata_link *link, unsigned int sc_reg,
+ u32 val)
+{
+ if (sc_reg > SCR_ACTIVE)
+ return -EINVAL;
+
+ iowrite32(val, link->ap->ioaddr.scr_addr + (sc_reg << 2));
+ return 0;
+}
+
+static void sata_rcar_bmdma_fill_sg(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct ata_bmdma_prd *prd = ap->bmdma_prd;
+ struct scatterlist *sg;
+ unsigned int si, pi;
+
+ pi = 0;
+ for_each_sg(qc->sg, sg, qc->n_elem, si) {
+ u32 addr, sg_len, len;
+
+ /*
+ * Note: h/w doesn't support 64-bit, so we unconditionally
+ * truncate dma_addr_t to u32.
+ */
+ addr = (u32)sg_dma_address(sg);
+ sg_len = sg_dma_len(sg);
+
+ /* H/w transfer count is only 29 bits long, let's be careful */
+ while (sg_len) {
+ len = sg_len;
+ if (len > 0x1ffffffe)
+ len = 0x1ffffffe;
+
+ prd[pi].addr = cpu_to_le32(addr);
+ prd[pi].flags_len = cpu_to_le32(len);
+ VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len);
+
+ pi++;
+ sg_len -= len;
+ addr += len;
+ }
+ }
+
+ /* end-of-table flag */
+ prd[pi - 1].addr |= cpu_to_le32(SATA_RCAR_DTEND);
+}
+
+static void sata_rcar_qc_prep(struct ata_queued_cmd *qc)
+{
+ if (!(qc->flags & ATA_QCFLAG_DMAMAP))
+ return;
+
+ sata_rcar_bmdma_fill_sg(qc);
+}
+
+static void sata_rcar_bmdma_setup(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ unsigned int rw = qc->tf.flags & ATA_TFLAG_WRITE;
+ u32 dmactl;
+ struct sata_rcar_priv *priv = ap->host->private_data;
+
+ /* load PRD table addr. */
+ mb(); /* make sure PRD table writes are visible to controller */
+ iowrite32(ap->bmdma_prd_dma, priv->base + ATAPI_DTB_ADR_REG);
+
+ /* specify data direction, triple-check start bit is clear */
+ dmactl = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ dmactl &= ~(ATAPI_CONTROL1_RW | ATAPI_CONTROL1_STOP);
+ if (dmactl & ATAPI_CONTROL1_START) {
+ dmactl &= ~ATAPI_CONTROL1_START;
+ dmactl |= ATAPI_CONTROL1_STOP;
+ }
+ if (!rw)
+ dmactl |= ATAPI_CONTROL1_RW;
+ iowrite32(dmactl, priv->base + ATAPI_CONTROL1_REG);
+
+ /* issue r/w command */
+ ap->ops->sff_exec_command(ap, &qc->tf);
+}
+
+static void sata_rcar_bmdma_start(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ u32 dmactl;
+ struct sata_rcar_priv *priv = ap->host->private_data;
+
+ /* start host DMA transaction */
+ dmactl = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ dmactl |= ATAPI_CONTROL1_START;
+ iowrite32(dmactl, priv->base + ATAPI_CONTROL1_REG);
+}
+
+static void sata_rcar_bmdma_stop(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct sata_rcar_priv *priv = ap->host->private_data;
+ u32 dmactl;
+
+ /* force termination of DMA transfer if active */
+ dmactl = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ if (dmactl & ATAPI_CONTROL1_START) {
+ dmactl &= ~ATAPI_CONTROL1_START;
+ dmactl |= ATAPI_CONTROL1_STOP;
+ iowrite32(dmactl, priv->base + ATAPI_CONTROL1_REG);
+ }
+
+ /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
+ ata_sff_dma_pause(ap);
+}
+
+static u8 sata_rcar_bmdma_status(struct ata_port *ap)
+{
+ struct sata_rcar_priv *priv = ap->host->private_data;
+ u32 status;
+ u8 host_stat = 0;
+
+ status = ioread32(priv->base + ATAPI_STATUS_REG);
+ if (status & ATAPI_STATUS_DEVINT)
+ host_stat |= ATA_DMA_INTR;
+ if (status & ATAPI_STATUS_ACT)
+ host_stat |= ATA_DMA_ACTIVE;
+
+ return host_stat;
+}
+
+static struct scsi_host_template sata_rcar_sht = {
+ ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations sata_rcar_port_ops = {
+ .inherits = &ata_bmdma_port_ops,
+
+ .freeze = sata_rcar_freeze,
+ .thaw = sata_rcar_thaw,
+ .softreset = sata_rcar_softreset,
+
+ .scr_read = sata_rcar_scr_read,
+ .scr_write = sata_rcar_scr_write,
+
+ .sff_dev_select = sata_rcar_dev_select,
+ .sff_set_devctl = sata_rcar_set_devctl,
+ .sff_check_status = sata_rcar_check_status,
+ .sff_check_altstatus = sata_rcar_check_altstatus,
+ .sff_tf_load = sata_rcar_tf_load,
+ .sff_tf_read = sata_rcar_tf_read,
+ .sff_exec_command = sata_rcar_exec_command,
+ .sff_data_xfer = sata_rcar_data_xfer,
+ .sff_drain_fifo = sata_rcar_drain_fifo,
+
+ .qc_prep = sata_rcar_qc_prep,
+
+ .bmdma_setup = sata_rcar_bmdma_setup,
+ .bmdma_start = sata_rcar_bmdma_start,
+ .bmdma_stop = sata_rcar_bmdma_stop,
+ .bmdma_status = sata_rcar_bmdma_status,
+};
+
+static int sata_rcar_serr_interrupt(struct ata_port *ap)
+{
+ struct sata_rcar_priv *priv = ap->host->private_data;
+ struct ata_eh_info *ehi = &ap->link.eh_info;
+ int freeze = 0;
+ int handled = 0;
+ u32 serror;
+
+ serror = ioread32(priv->base + SCRSERR_REG);
+ if (!serror)
+ return 0;
+
+ DPRINTK("SError @host_intr: 0x%x\n", serror);
+
+ /* first, analyze and record host port events */
+ ata_ehi_clear_desc(ehi);
+
+ if (serror & (SERR_DEV_XCHG | SERR_PHYRDY_CHG)) {
+ /* Setup a soft-reset EH action */
+ ata_ehi_hotplugged(ehi);
+ ata_ehi_push_desc(ehi, "%s", "hotplug");
+
+ freeze = serror & SERR_COMM_WAKE ? 0 : 1;
+ handled = 1;
+ }
+
+ /* freeze or abort */
+ if (freeze)
+ ata_port_freeze(ap);
+ else
+ ata_port_abort(ap);
+
+ return handled;
+}
+
+static int sata_rcar_ata_interrupt(struct ata_port *ap)
+{
+ struct ata_queued_cmd *qc;
+ int handled = 0;
+
+ qc = ata_qc_from_tag(ap, ap->link.active_tag);
+ if (qc)
+ handled |= ata_bmdma_port_intr(ap, qc);
+
+ return handled;
+}
+
+static irqreturn_t sata_rcar_interrupt(int irq, void *dev_instance)
+{
+ struct ata_host *host = dev_instance;
+ struct sata_rcar_priv *priv = host->private_data;
+ struct ata_port *ap;
+ unsigned int handled = 0;
+ u32 sataintstat;
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ sataintstat = ioread32(priv->base + SATAINTSTAT_REG);
+ if (!sataintstat)
+ goto done;
+ /* ack */
+ iowrite32(sataintstat & ~SATA_RCAR_INT_MASK,
+ priv->base + SATAINTSTAT_REG);
+
+ ap = host->ports[0];
+
+ if (sataintstat & SATAINTSTAT_ATA)
+ handled |= sata_rcar_ata_interrupt(ap);
+
+ if (sataintstat & SATAINTSTAT_SERR)
+ handled |= sata_rcar_serr_interrupt(ap);
+
+done:
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ return IRQ_RETVAL(handled);
+}
+
+static void sata_rcar_setup_port(struct ata_host *host)
+{
+ struct ata_port *ap = host->ports[0];
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+ struct sata_rcar_priv *priv = host->private_data;
+
+ ap->ops = &sata_rcar_port_ops;
+ ap->pio_mask = ATA_PIO4;
+ ap->udma_mask = ATA_UDMA6;
+ ap->flags |= ATA_FLAG_SATA;
+
+ ioaddr->cmd_addr = priv->base + SDATA_REG;
+ ioaddr->ctl_addr = priv->base + SSDEVCON_REG;
+ ioaddr->scr_addr = priv->base + SCRSSTS_REG;
+ ioaddr->altstatus_addr = ioaddr->ctl_addr;
+
+ ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << 2);
+ ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << 2);
+ ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << 2);
+ ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << 2);
+ ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << 2);
+ ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << 2);
+ ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << 2);
+ ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << 2);
+ ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << 2);
+ ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << 2);
+}
+
+static void sata_rcar_init_controller(struct ata_host *host)
+{
+ struct sata_rcar_priv *priv = host->private_data;
+ u32 val;
+
+ /* reset and setup phy */
+ sata_rcar_phy_initialize(priv);
+ sata_rcar_phy_write(priv, SATAPCTLR1_REG, 0x00200188, 0);
+ sata_rcar_phy_write(priv, SATAPCTLR1_REG, 0x00200188, 1);
+ sata_rcar_phy_write(priv, SATAPCTLR3_REG, 0x0000A061, 0);
+ sata_rcar_phy_write(priv, SATAPCTLR2_REG, 0x20000000, 0);
+ sata_rcar_phy_write(priv, SATAPCTLR2_REG, 0x20000000, 1);
+ sata_rcar_phy_write(priv, SATAPCTLR4_REG, 0x28E80000, 0);
+
+ /* SATA-IP reset state */
+ val = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ val |= ATAPI_CONTROL1_RESET;
+ iowrite32(val, priv->base + ATAPI_CONTROL1_REG);
+
+ /* ISM mode, PRD mode, DTEND flag at bit 0 */
+ val = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ val |= ATAPI_CONTROL1_ISM;
+ val |= ATAPI_CONTROL1_DESE;
+ val |= ATAPI_CONTROL1_DTA32M;
+ iowrite32(val, priv->base + ATAPI_CONTROL1_REG);
+
+ /* Release the SATA-IP from the reset state */
+ val = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ val &= ~ATAPI_CONTROL1_RESET;
+ iowrite32(val, priv->base + ATAPI_CONTROL1_REG);
+
+ /* ack and mask */
+ iowrite32(0, priv->base + SATAINTSTAT_REG);
+ iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
+ /* enable interrupts */
+ iowrite32(ATAPI_INT_ENABLE_SATAINT, priv->base + ATAPI_INT_ENABLE_REG);
+}
+
+static int sata_rcar_probe(struct platform_device *pdev)
+{
+ struct ata_host *host;
+ struct sata_rcar_priv *priv;
+ struct resource *mem;
+ int irq;
+ int ret = 0;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (mem == NULL)
+ return -EINVAL;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0)
+ return -EINVAL;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(struct sata_rcar_priv),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(priv->clk)) {
+ dev_err(&pdev->dev, "failed to get access to sata clock\n");
+ return PTR_ERR(priv->clk);
+ }
+ clk_enable(priv->clk);
+
+ host = ata_host_alloc(&pdev->dev, 1);
+ if (!host) {
+ dev_err(&pdev->dev, "ata_host_alloc failed\n");
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+
+ host->private_data = priv;
+
+ priv->base = devm_request_and_ioremap(&pdev->dev, mem);
+ if (!priv->base) {
+ ret = -EADDRNOTAVAIL;
+ goto cleanup;
+ }
+
+ /* setup port */
+ sata_rcar_setup_port(host);
+
+ /* initialize host controller */
+ sata_rcar_init_controller(host);
+
+ ret = ata_host_activate(host, irq, sata_rcar_interrupt, 0,
+ &sata_rcar_sht);
+ if (!ret)
+ return 0;
+
+cleanup:
+ clk_disable(priv->clk);
+
+ return ret;
+}
+
+static int sata_rcar_remove(struct platform_device *pdev)
+{
+ struct ata_host *host = dev_get_drvdata(&pdev->dev);
+ struct sata_rcar_priv *priv = host->private_data;
+
+ ata_host_detach(host);
+
+ /* disable interrupts */
+ iowrite32(0, priv->base + ATAPI_INT_ENABLE_REG);
+ /* ack and mask */
+ iowrite32(0, priv->base + SATAINTSTAT_REG);
+ iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
+
+ clk_disable(priv->clk);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int sata_rcar_suspend(struct device *dev)
+{
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct sata_rcar_priv *priv = host->private_data;
+ int ret;
+
+ ret = ata_host_suspend(host, PMSG_SUSPEND);
+ if (!ret) {
+ /* disable interrupts */
+ iowrite32(0, priv->base + ATAPI_INT_ENABLE_REG);
+ /* mask */
+ iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
+
+ clk_disable(priv->clk);
+ }
+
+ return ret;
+}
+
+static int sata_rcar_resume(struct device *dev)
+{
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct sata_rcar_priv *priv = host->private_data;
+
+ clk_enable(priv->clk);
+
+ /* ack and mask */
+ iowrite32(0, priv->base + SATAINTSTAT_REG);
+ iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
+ /* enable interrupts */
+ iowrite32(ATAPI_INT_ENABLE_SATAINT, priv->base + ATAPI_INT_ENABLE_REG);
+
+ ata_host_resume(host);
+
+ return 0;
+}
+
+static const struct dev_pm_ops sata_rcar_pm_ops = {
+ .suspend = sata_rcar_suspend,
+ .resume = sata_rcar_resume,
+};
+#endif
+
+static struct of_device_id sata_rcar_match[] = {
+ { .compatible = "renesas,rcar-sata", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, sata_rcar_match);
+
+static struct platform_driver sata_rcar_driver = {
+ .probe = sata_rcar_probe,
+ .remove = sata_rcar_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = sata_rcar_match,
+#ifdef CONFIG_PM
+ .pm = &sata_rcar_pm_ops,
+#endif
+ },
+};
+
+module_platform_driver(sata_rcar_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Vladimir Barinov");
+MODULE_DESCRIPTION("Renesas R-Car SATA controller low level driver");
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index f1bf5aff68ed..765398c063c7 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2617,3 +2617,17 @@ void scsi_kunmap_atomic_sg(void *virt)
kunmap_atomic(virt);
}
EXPORT_SYMBOL(scsi_kunmap_atomic_sg);
+
+void sdev_disable_disk_events(struct scsi_device *sdev)
+{
+ atomic_inc(&sdev->disk_events_disable_depth);
+}
+EXPORT_SYMBOL(sdev_disable_disk_events);
+
+void sdev_enable_disk_events(struct scsi_device *sdev)
+{
+ if (WARN_ON_ONCE(atomic_read(&sdev->disk_events_disable_depth) <= 0))
+ return;
+ atomic_dec(&sdev->disk_events_disable_depth);
+}
+EXPORT_SYMBOL(sdev_enable_disk_events);
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 5fc97d2ba2fd..f2884ee90710 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -45,6 +45,7 @@
#include <linux/blkdev.h>
#include <linux/mutex.h>
#include <linux/slab.h>
+#include <linux/pm_runtime.h>
#include <asm/uaccess.h>
#include <scsi/scsi.h>
@@ -79,6 +80,11 @@ static DEFINE_MUTEX(sr_mutex);
static int sr_probe(struct device *);
static int sr_remove(struct device *);
static int sr_done(struct scsi_cmnd *);
+static int sr_runtime_suspend(struct device *dev);
+
+static struct dev_pm_ops sr_pm_ops = {
+ .runtime_suspend = sr_runtime_suspend,
+};
static struct scsi_driver sr_template = {
.owner = THIS_MODULE,
@@ -86,6 +92,7 @@ static struct scsi_driver sr_template = {
.name = "sr",
.probe = sr_probe,
.remove = sr_remove,
+ .pm = &sr_pm_ops,
},
.done = sr_done,
};
@@ -131,6 +138,16 @@ static inline struct scsi_cd *scsi_cd(struct gendisk *disk)
return container_of(disk->private_data, struct scsi_cd, driver);
}
+static int sr_runtime_suspend(struct device *dev)
+{
+ struct scsi_cd *cd = dev_get_drvdata(dev);
+
+ if (cd->media_present)
+ return -EBUSY;
+ else
+ return 0;
+}
+
/*
* The get and put routines for the struct scsi_cd. Note this entity
* has a scsi_device pointer and owns a reference to this.
@@ -146,7 +163,8 @@ static inline struct scsi_cd *scsi_cd_get(struct gendisk *disk)
kref_get(&cd->kref);
if (scsi_device_get(cd->device))
goto out_put;
- goto out;
+ if (!scsi_autopm_get_device(cd->device))
+ goto out;
out_put:
kref_put(&cd->kref, sr_kref_release);
@@ -162,6 +180,7 @@ static void scsi_cd_put(struct scsi_cd *cd)
mutex_lock(&sr_ref_mutex);
kref_put(&cd->kref, sr_kref_release);
+ scsi_autopm_put_device(sdev);
scsi_device_put(sdev);
mutex_unlock(&sr_ref_mutex);
}
@@ -540,6 +559,8 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
void __user *argp = (void __user *)arg;
int ret;
+ scsi_autopm_get_device(cd->device);
+
mutex_lock(&sr_mutex);
/*
@@ -571,6 +592,7 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
out:
mutex_unlock(&sr_mutex);
+ scsi_autopm_put_device(cd->device);
return ret;
}
@@ -578,7 +600,17 @@ static unsigned int sr_block_check_events(struct gendisk *disk,
unsigned int clearing)
{
struct scsi_cd *cd = scsi_cd(disk);
- return cdrom_check_events(&cd->cdi, clearing);
+ unsigned int ret;
+
+ if (atomic_read(&cd->device->disk_events_disable_depth) == 0) {
+ scsi_autopm_get_device(cd->device);
+ ret = cdrom_check_events(&cd->cdi, clearing);
+ scsi_autopm_put_device(cd->device);
+ } else {
+ ret = 0;
+ }
+
+ return ret;
}
static int sr_block_revalidate_disk(struct gendisk *disk)
@@ -586,12 +618,16 @@ static int sr_block_revalidate_disk(struct gendisk *disk)
struct scsi_cd *cd = scsi_cd(disk);
struct scsi_sense_hdr sshdr;
+ scsi_autopm_get_device(cd->device);
+
/* if the unit is not ready, nothing more to do */
if (scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr))
- return 0;
+ goto out;
sr_cd_check(&cd->cdi);
get_sectorsize(cd);
+out:
+ scsi_autopm_put_device(cd->device);
return 0;
}
@@ -718,6 +754,8 @@ static int sr_probe(struct device *dev)
sdev_printk(KERN_DEBUG, sdev,
"Attached scsi CD-ROM %s\n", cd->cdi.name);
+ scsi_autopm_put_device(cd->device);
+
return 0;
fail_put:
@@ -965,6 +1003,8 @@ static int sr_remove(struct device *dev)
{
struct scsi_cd *cd = dev_get_drvdata(dev);
+ scsi_autopm_get_device(cd->device);
+
blk_queue_prep_rq(cd->device->request_queue, scsi_prep_fn);
del_gendisk(cd->disk);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-13 16:53:46 +0000