summaryrefslogtreecommitdiffstats
path: root/drivers/usb/core
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-07 13:16:28 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-07 13:16:28 -0800
commit3e5b08cbbf78bedd316904ab0cf3b27119433ee5 (patch)
tree0365745c1b7441c1868551c024410c829c3accc6 /drivers/usb/core
parentda40d036fd716f0efb2917076220814b1e927ae1 (diff)
parent2af10844eb6ed104f9505bf3a7ba3ceb02264f31 (diff)
downloadop-kernel-dev-3e5b08cbbf78bedd316904ab0cf3b27119433ee5.zip
op-kernel-dev-3e5b08cbbf78bedd316904ab0cf3b27119433ee5.tar.gz
Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (144 commits) USB: add support for Dream Cheeky DL100B Webmail Notifier (1d34:0004) USB: serial: ftdi_sio: add support for TIOCSERGETLSR USB: ehci-mxc: Setup portsc register prior to accessing OTG viewport USB: atmel_usba_udc: fix freeing irq in usba_udc_remove() usb: ehci-omap: fix tll channel enable mask usb: ohci-omap3: fix trivial typo USB: gadget: ci13xxx: don't assume that PAGE_SIZE is 4096 USB: gadget: ci13xxx: fix complete() callback for no_interrupt rq's USB: gadget: update ci13xxx to work with g_ether USB: gadgets: ci13xxx: fix probing of compiled-in gadget drivers Revert "USB: musb: pm: don't rely fully on clock support" Revert "USB: musb: blackfin: pm: make it work" USB: uas: Use GFP_NOIO instead of GFP_KERNEL in I/O submission path USB: uas: Ensure we only bind to a UAS interface USB: uas: Rename sense pipe and sense urb to status pipe and status urb USB: uas: Use kzalloc instead of kmalloc USB: uas: Fix up the Sense IU usb: musb: core: kill unneeded #include's DA8xx: assign name to MUSB IRQ resource usb: gadget: g_ncm added ... Manually fix up trivial conflicts in USB Kconfig changes in: arch/arm/mach-omap2/Kconfig arch/sh/Kconfig drivers/usb/Kconfig drivers/usb/host/ehci-hcd.c and annoying chip clock data conflicts in: arch/arm/mach-omap2/clock3xxx_data.c arch/arm/mach-omap2/clock44xx_data.c
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/driver.c150
-rw-r--r--drivers/usb/core/hcd-pci.c1
-rw-r--r--drivers/usb/core/hcd.c1
-rw-r--r--drivers/usb/core/hub.c11
-rw-r--r--drivers/usb/core/message.c1
-rw-r--r--drivers/usb/core/quirks.c15
-rw-r--r--drivers/usb/core/sysfs.c84
-rw-r--r--drivers/usb/core/usb.c3
-rw-r--r--drivers/usb/core/usb.h2
9 files changed, 61 insertions, 207 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index c0e60fb..b9278a1 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -27,7 +27,6 @@
#include <linux/usb.h>
#include <linux/usb/quirks.h>
#include <linux/usb/hcd.h>
-#include <linux/pm_runtime.h>
#include "usb.h"
@@ -1262,6 +1261,7 @@ static int usb_resume_both(struct usb_device *udev, pm_message_t msg)
udev->reset_resume);
}
}
+ usb_mark_last_busy(udev);
done:
dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status);
@@ -1329,7 +1329,6 @@ int usb_resume(struct device *dev, pm_message_t msg)
pm_runtime_disable(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
- udev->last_busy = jiffies;
do_unbind_rebind(udev, DO_REBIND);
}
}
@@ -1397,33 +1396,8 @@ void usb_autosuspend_device(struct usb_device *udev)
{
int status;
- udev->last_busy = jiffies;
- status = pm_runtime_put_sync(&udev->dev);
- dev_vdbg(&udev->dev, "%s: cnt %d -> %d\n",
- __func__, atomic_read(&udev->dev.power.usage_count),
- status);
-}
-
-/**
- * usb_try_autosuspend_device - attempt an autosuspend of a USB device and its interfaces
- * @udev: the usb_device to autosuspend
- *
- * This routine should be called when a core subsystem thinks @udev may
- * be ready to autosuspend.
- *
- * @udev's usage counter left unchanged. If it is 0 and all the interfaces
- * are inactive then an autosuspend will be attempted. The attempt may
- * fail or be delayed.
- *
- * The caller must hold @udev's device lock.
- *
- * This routine can run only in process context.
- */
-void usb_try_autosuspend_device(struct usb_device *udev)
-{
- int status;
-
- status = pm_runtime_idle(&udev->dev);
+ usb_mark_last_busy(udev);
+ status = pm_runtime_put_sync_autosuspend(&udev->dev);
dev_vdbg(&udev->dev, "%s: cnt %d -> %d\n",
__func__, atomic_read(&udev->dev.power.usage_count),
status);
@@ -1482,7 +1456,7 @@ void usb_autopm_put_interface(struct usb_interface *intf)
struct usb_device *udev = interface_to_usbdev(intf);
int status;
- udev->last_busy = jiffies;
+ usb_mark_last_busy(udev);
atomic_dec(&intf->pm_usage_cnt);
status = pm_runtime_put_sync(&intf->dev);
dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n",
@@ -1509,32 +1483,11 @@ EXPORT_SYMBOL_GPL(usb_autopm_put_interface);
void usb_autopm_put_interface_async(struct usb_interface *intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
- unsigned long last_busy;
- int status = 0;
+ int status;
- last_busy = udev->last_busy;
- udev->last_busy = jiffies;
+ usb_mark_last_busy(udev);
atomic_dec(&intf->pm_usage_cnt);
- pm_runtime_put_noidle(&intf->dev);
-
- if (udev->dev.power.runtime_auto) {
- /* Optimization: Don't schedule a delayed autosuspend if
- * the timer is already running and the expiration time
- * wouldn't change.
- *
- * We have to use the interface's timer. Attempts to
- * schedule a suspend for the device would fail because
- * the interface is still active.
- */
- if (intf->dev.power.timer_expires == 0 ||
- round_jiffies_up(last_busy) !=
- round_jiffies_up(jiffies)) {
- status = pm_schedule_suspend(&intf->dev,
- jiffies_to_msecs(
- round_jiffies_up_relative(
- udev->autosuspend_delay)));
- }
- }
+ status = pm_runtime_put(&intf->dev);
dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n",
__func__, atomic_read(&intf->dev.power.usage_count),
status);
@@ -1554,7 +1507,7 @@ void usb_autopm_put_interface_no_suspend(struct usb_interface *intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
- udev->last_busy = jiffies;
+ usb_mark_last_busy(udev);
atomic_dec(&intf->pm_usage_cnt);
pm_runtime_put_noidle(&intf->dev);
}
@@ -1612,18 +1565,9 @@ EXPORT_SYMBOL_GPL(usb_autopm_get_interface);
*/
int usb_autopm_get_interface_async(struct usb_interface *intf)
{
- int status = 0;
- enum rpm_status s;
-
- /* Don't request a resume unless the interface is already suspending
- * or suspended. Doing so would force a running suspend timer to be
- * cancelled.
- */
- pm_runtime_get_noresume(&intf->dev);
- s = ACCESS_ONCE(intf->dev.power.runtime_status);
- if (s == RPM_SUSPENDING || s == RPM_SUSPENDED)
- status = pm_request_resume(&intf->dev);
+ int status;
+ status = pm_runtime_get(&intf->dev);
if (status < 0 && status != -EINPROGRESS)
pm_runtime_put_noidle(&intf->dev);
else
@@ -1650,7 +1594,7 @@ void usb_autopm_get_interface_no_resume(struct usb_interface *intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
- udev->last_busy = jiffies;
+ usb_mark_last_busy(udev);
atomic_inc(&intf->pm_usage_cnt);
pm_runtime_get_noresume(&intf->dev);
}
@@ -1661,7 +1605,6 @@ static int autosuspend_check(struct usb_device *udev)
{
int w, i;
struct usb_interface *intf;
- unsigned long suspend_time, j;
/* Fail if autosuspend is disabled, or any interfaces are in use, or
* any interface drivers require remote wakeup but it isn't available.
@@ -1701,87 +1644,46 @@ static int autosuspend_check(struct usb_device *udev)
return -EOPNOTSUPP;
}
udev->do_remote_wakeup = w;
-
- /* If everything is okay but the device hasn't been idle for long
- * enough, queue a delayed autosuspend request.
- */
- j = ACCESS_ONCE(jiffies);
- suspend_time = udev->last_busy + udev->autosuspend_delay;
- if (time_before(j, suspend_time)) {
- pm_schedule_suspend(&udev->dev, jiffies_to_msecs(
- round_jiffies_up_relative(suspend_time - j)));
- return -EAGAIN;
- }
return 0;
}
static int usb_runtime_suspend(struct device *dev)
{
- int status = 0;
+ struct usb_device *udev = to_usb_device(dev);
+ int status;
/* A USB device can be suspended if it passes the various autosuspend
* checks. Runtime suspend for a USB device means suspending all the
* interfaces and then the device itself.
*/
- if (is_usb_device(dev)) {
- struct usb_device *udev = to_usb_device(dev);
-
- if (autosuspend_check(udev) != 0)
- return -EAGAIN;
-
- status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND);
-
- /* If an interface fails the suspend, adjust the last_busy
- * time so that we don't get another suspend attempt right
- * away.
- */
- if (status) {
- udev->last_busy = jiffies +
- (udev->autosuspend_delay == 0 ?
- HZ/2 : 0);
- }
-
- /* Prevent the parent from suspending immediately after */
- else if (udev->parent)
- udev->parent->last_busy = jiffies;
- }
+ if (autosuspend_check(udev) != 0)
+ return -EAGAIN;
- /* Runtime suspend for a USB interface doesn't mean anything. */
+ status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND);
return status;
}
static int usb_runtime_resume(struct device *dev)
{
+ struct usb_device *udev = to_usb_device(dev);
+ int status;
+
/* Runtime resume for a USB device means resuming both the device
* and all its interfaces.
*/
- if (is_usb_device(dev)) {
- struct usb_device *udev = to_usb_device(dev);
- int status;
-
- status = usb_resume_both(udev, PMSG_AUTO_RESUME);
- udev->last_busy = jiffies;
- return status;
- }
-
- /* Runtime resume for a USB interface doesn't mean anything. */
- return 0;
+ status = usb_resume_both(udev, PMSG_AUTO_RESUME);
+ return status;
}
static int usb_runtime_idle(struct device *dev)
{
+ struct usb_device *udev = to_usb_device(dev);
+
/* An idle USB device can be suspended if it passes the various
- * autosuspend checks. An idle interface can be suspended at
- * any time.
+ * autosuspend checks.
*/
- if (is_usb_device(dev)) {
- struct usb_device *udev = to_usb_device(dev);
-
- if (autosuspend_check(udev) != 0)
- return 0;
- }
-
- pm_runtime_suspend(dev);
+ if (autosuspend_check(udev) == 0)
+ pm_runtime_autosuspend(dev);
return 0;
}
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 3799573..b55d460 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -19,7 +19,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
-#include <linux/pm_runtime.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index ced846a..6a95017 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -38,7 +38,6 @@
#include <asm/unaligned.h>
#include <linux/platform_device.h>
#include <linux/workqueue.h>
-#include <linux/pm_runtime.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 27115b4..b98efae 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -24,7 +24,6 @@
#include <linux/kthread.h>
#include <linux/mutex.h>
#include <linux/freezer.h>
-#include <linux/pm_runtime.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
@@ -1804,8 +1803,15 @@ int usb_new_device(struct usb_device *udev)
/* Tell the runtime-PM framework the device is active */
pm_runtime_set_active(&udev->dev);
+ pm_runtime_get_noresume(&udev->dev);
+ pm_runtime_use_autosuspend(&udev->dev);
pm_runtime_enable(&udev->dev);
+ /* By default, forbid autosuspend for all devices. It will be
+ * allowed for hubs during binding.
+ */
+ usb_disable_autosuspend(udev);
+
err = usb_enumerate_device(udev); /* Read descriptors */
if (err < 0)
goto fail;
@@ -1831,6 +1837,8 @@ int usb_new_device(struct usb_device *udev)
}
(void) usb_create_ep_devs(&udev->dev, &udev->ep0, udev);
+ usb_mark_last_busy(udev);
+ pm_runtime_put_sync_autosuspend(&udev->dev);
return err;
fail:
@@ -2221,6 +2229,7 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
usb_set_device_state(udev, USB_STATE_SUSPENDED);
msleep(10);
}
+ usb_mark_last_busy(hub->hdev);
return status;
}
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index d6e3e41..8324874 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1804,6 +1804,7 @@ free_interfaces:
INIT_WORK(&intf->reset_ws, __usb_queue_reset_device);
intf->minor = -1;
device_initialize(&intf->dev);
+ pm_runtime_no_callbacks(&intf->dev);
dev_set_name(&intf->dev, "%d-%s:%d.%d",
dev->bus->busnum, dev->devpath,
configuration, alt->desc.bInterfaceNumber);
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 25719da..44c5954 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -117,21 +117,6 @@ void usb_detect_quirks(struct usb_device *udev)
dev_dbg(&udev->dev, "USB quirks for this device: %x\n",
udev->quirks);
-#ifdef CONFIG_USB_SUSPEND
-
- /* By default, disable autosuspend for all devices. The hub driver
- * will enable it for hubs.
- */
- usb_disable_autosuspend(udev);
-
- /* Autosuspend can also be disabled if the initial autosuspend_delay
- * is negative.
- */
- if (udev->autosuspend_delay < 0)
- usb_autoresume_device(udev);
-
-#endif
-
/* For the present, all devices default to USB-PERSIST enabled */
#if 0 /* was: #ifdef CONFIG_PM */
/* Hubs are automatically enabled for USB-PERSIST */
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 448f5b4..6781c36 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -233,8 +233,6 @@ static DEVICE_ATTR(urbnum, S_IRUGO, show_urbnum, NULL);
#ifdef CONFIG_PM
-static const char power_group[] = "power";
-
static ssize_t
show_persist(struct device *dev, struct device_attribute *attr, char *buf)
{
@@ -278,7 +276,7 @@ static int add_persist_attributes(struct device *dev)
if (udev->descriptor.bDeviceClass != USB_CLASS_HUB)
rc = sysfs_add_file_to_group(&dev->kobj,
&dev_attr_persist.attr,
- power_group);
+ power_group_name);
}
return rc;
}
@@ -287,7 +285,7 @@ static void remove_persist_attributes(struct device *dev)
{
sysfs_remove_file_from_group(&dev->kobj,
&dev_attr_persist.attr,
- power_group);
+ power_group_name);
}
#else
@@ -336,44 +334,20 @@ static DEVICE_ATTR(active_duration, S_IRUGO, show_active_duration, NULL);
static ssize_t
show_autosuspend(struct device *dev, struct device_attribute *attr, char *buf)
{
- struct usb_device *udev = to_usb_device(dev);
-
- return sprintf(buf, "%d\n", udev->autosuspend_delay / HZ);
+ return sprintf(buf, "%d\n", dev->power.autosuspend_delay / 1000);
}
static ssize_t
set_autosuspend(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct usb_device *udev = to_usb_device(dev);
- int value, old_delay;
- int rc;
+ int value;
- if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/HZ ||
- value <= - INT_MAX/HZ)
+ if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/1000 ||
+ value <= -INT_MAX/1000)
return -EINVAL;
- value *= HZ;
-
- usb_lock_device(udev);
- old_delay = udev->autosuspend_delay;
- udev->autosuspend_delay = value;
-
- if (old_delay < 0) { /* Autosuspend wasn't allowed */
- if (value >= 0)
- usb_autosuspend_device(udev);
- } else { /* Autosuspend was allowed */
- if (value < 0) {
- rc = usb_autoresume_device(udev);
- if (rc < 0) {
- count = rc;
- udev->autosuspend_delay = old_delay;
- }
- } else {
- usb_try_autosuspend_device(udev);
- }
- }
- usb_unlock_device(udev);
+ pm_runtime_set_autosuspend_delay(dev, value * 1000);
return count;
}
@@ -438,44 +412,30 @@ set_level(struct device *dev, struct device_attribute *attr,
static DEVICE_ATTR(level, S_IRUGO | S_IWUSR, show_level, set_level);
+static struct attribute *power_attrs[] = {
+ &dev_attr_autosuspend.attr,
+ &dev_attr_level.attr,
+ &dev_attr_connected_duration.attr,
+ &dev_attr_active_duration.attr,
+ NULL,
+};
+static struct attribute_group power_attr_group = {
+ .name = power_group_name,
+ .attrs = power_attrs,
+};
+
static int add_power_attributes(struct device *dev)
{
int rc = 0;
- if (is_usb_device(dev)) {
- rc = sysfs_add_file_to_group(&dev->kobj,
- &dev_attr_autosuspend.attr,
- power_group);
- if (rc == 0)
- rc = sysfs_add_file_to_group(&dev->kobj,
- &dev_attr_level.attr,
- power_group);
- if (rc == 0)
- rc = sysfs_add_file_to_group(&dev->kobj,
- &dev_attr_connected_duration.attr,
- power_group);
- if (rc == 0)
- rc = sysfs_add_file_to_group(&dev->kobj,
- &dev_attr_active_duration.attr,
- power_group);
- }
+ if (is_usb_device(dev))
+ rc = sysfs_merge_group(&dev->kobj, &power_attr_group);
return rc;
}
static void remove_power_attributes(struct device *dev)
{
- sysfs_remove_file_from_group(&dev->kobj,
- &dev_attr_active_duration.attr,
- power_group);
- sysfs_remove_file_from_group(&dev->kobj,
- &dev_attr_connected_duration.attr,
- power_group);
- sysfs_remove_file_from_group(&dev->kobj,
- &dev_attr_level.attr,
- power_group);
- sysfs_remove_file_from_group(&dev->kobj,
- &dev_attr_autosuspend.attr,
- power_group);
+ sysfs_unmerge_group(&dev->kobj, &power_attr_group);
}
#else
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index fdd4130..079cb57 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -445,7 +445,8 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
INIT_LIST_HEAD(&dev->filelist);
#ifdef CONFIG_PM
- dev->autosuspend_delay = usb_autosuspend_delay * HZ;
+ pm_runtime_set_autosuspend_delay(&dev->dev,
+ usb_autosuspend_delay * 1000);
dev->connect_time = jiffies;
dev->active_duration = -jiffies;
#endif
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index cd88220..b975450 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -75,14 +75,12 @@ static inline int usb_port_resume(struct usb_device *udev, pm_message_t msg)
#ifdef CONFIG_USB_SUSPEND
extern void usb_autosuspend_device(struct usb_device *udev);
-extern void usb_try_autosuspend_device(struct usb_device *udev);
extern int usb_autoresume_device(struct usb_device *udev);
extern int usb_remote_wakeup(struct usb_device *dev);
#else
#define usb_autosuspend_device(udev) do {} while (0)
-#define usb_try_autosuspend_device(udev) do {} while (0)
static inline int usb_autoresume_device(struct usb_device *udev)
{
return 0;
OpenPOWER on IntegriCloud