This patch (as1236) converts the USB PCI power management routines
over to the new PM framework.
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
CC: "Rafael J. Wysocki" <rjw@xxxxxxx>
---
Index: usb-2.6/drivers/usb/core/hcd.h
===================================================================
--- usb-2.6.orig/drivers/usb/core/hcd.h
+++ usb-2.6/drivers/usb/core/hcd.h
@@ -261,14 +261,11 @@ struct pci_device_id;
extern int usb_hcd_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id);
extern void usb_hcd_pci_remove(struct pci_dev *dev);
-
-#ifdef CONFIG_PM
-extern int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t msg);
-extern int usb_hcd_pci_resume(struct pci_dev *dev);
-#endif /* CONFIG_PM */
-
extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
+#ifdef CONFIG_PM_SLEEP
+extern struct dev_pm_ops usb_hcd_pci_pm_ops;
+#endif
#endif /* CONFIG_PCI */
/* pci-ish (pdev null is ok) buffer alloc/mapping support */
Index: usb-2.6/drivers/usb/core/hcd-pci.c
===================================================================
--- usb-2.6.orig/drivers/usb/core/hcd-pci.c
+++ usb-2.6/drivers/usb/core/hcd-pci.c
@@ -185,194 +185,198 @@ void usb_hcd_pci_remove(struct pci_dev *
}
EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
-
-#ifdef CONFIG_PM
-
/**
- * usb_hcd_pci_suspend - power management suspend of a PCI-based HCD
- * @dev: USB Host Controller being suspended
- * @message: Power Management message describing this state transition
- *
- * Store this function in the HCD's struct pci_driver as .suspend.
+ * usb_hcd_pci_shutdown - shutdown host controller
+ * @dev: USB Host Controller being shutdown
*/
-int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
+void usb_hcd_pci_shutdown(struct pci_dev *dev)
+{
+ struct usb_hcd *hcd;
+
+ hcd = pci_get_drvdata(dev);
+ if (!hcd)
+ return;
+
+ if (hcd->driver->shutdown)
+ hcd->driver->shutdown(hcd);
+}
+EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
+
+#ifdef CONFIG_PM_SLEEP
+
+static int check_root_hub_suspended(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
+
+ if (!(hcd->state == HC_STATE_SUSPENDED ||
+ hcd->state == HC_STATE_HALT)) {
+ dev_warn(dev, "Root hub is not suspended\n");
+ return -EBUSY;
+ }
+ return 0;
+}
+
+static int hcd_pci_suspend(struct device *dev)
{
- struct usb_hcd *hcd = pci_get_drvdata(dev);
- int retval = 0;
- int wake, w;
- int has_pci_pm;
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
+ int retval;
/* Root hub suspend should have stopped all downstream traffic,
* and all bus master traffic. And done so for both the interface
* and the stub usb_device (which we check here). But maybe it
* didn't; writing sysfs power/state files ignores such rules...
- *
- * We must ignore the FREEZE vs SUSPEND distinction here, because
- * otherwise the swsusp will save (and restore) garbage state.
*/
- if (!(hcd->state == HC_STATE_SUSPENDED ||
- hcd->state == HC_STATE_HALT)) {
- dev_warn(&dev->dev, "Root hub is not suspended\n");
- retval = -EBUSY;
- goto done;
- }
+ retval = check_root_hub_suspended(dev);
+ if (retval)
+ return retval;
/* We might already be suspended (runtime PM -- not yet written) */
- if (dev->current_state != PCI_D0)
- goto done;
+ if (pci_dev->current_state != PCI_D0)
+ return retval;
if (hcd->driver->pci_suspend) {
- retval = hcd->driver->pci_suspend(hcd, message);
+ retval = hcd->driver->pci_suspend(hcd, PMSG_SUSPEND);
suspend_report_result(hcd->driver->pci_suspend, retval);
if (retval)
- goto done;
+ return retval;
}
- synchronize_irq(dev->irq);
+ synchronize_irq(pci_dev->irq);
/* Downstream ports from this root hub should already be quiesced, so
* there will be no DMA activity. Now we can shut down the upstream
- * link (except maybe for PME# resume signaling) and enter some PCI
- * low power state, if the hardware allows.
+ * link (except maybe for PME# resume signaling). We'll enter a
+ * low power state during suspend_noirq, if the hardware allows.
*/
- pci_disable_device(dev);
+ pci_disable_device(pci_dev);
+ return retval;
+}
+
+static int hcd_pci_suspend_noirq(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
+ int retval;
+
+ retval = check_root_hub_suspended(dev);
+ if (retval)
+ return retval;
- pci_save_state(dev);
+ pci_save_state(pci_dev);
- /* Don't fail on error to enable wakeup. We rely on pci code
- * to reject requests the hardware can't implement, rather
- * than coding the same thing.
+ /* If the root hub is HALTed rather than SUSPENDed,
+ * disallow remote wakeup.
*/
- wake = (hcd->state == HC_STATE_SUSPENDED &&
- device_may_wakeup(&dev->dev));
- w = pci_wake_from_d3(dev, wake);
- if (w < 0)
- wake = w;
- dev_dbg(&dev->dev, "wakeup: %d\n", wake);
-
- /* Don't change state if we don't need to */
- if (message.event == PM_EVENT_FREEZE ||
- message.event == PM_EVENT_PRETHAW) {
- dev_dbg(&dev->dev, "--> no state change\n");
- goto done;
- }
-
- has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
- if (!has_pci_pm) {
- dev_dbg(&dev->dev, "--> PCI D0 legacy\n");
- } else {
+ if (hcd->state == HC_STATE_HALT)
+ device_set_wakeup_enable(dev, 0);
+ dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
- /* NOTE: dev->current_state becomes nonzero only here, and
- * only for devices that support PCI PM. Also, exiting
- * PCI_D3 (but not PCI_D1 or PCI_D2) is allowed to reset
- * some device state (e.g. as part of clock reinit).
- */
- retval = pci_set_power_state(dev, PCI_D3hot);
- suspend_report_result(pci_set_power_state, retval);
- if (retval == 0) {
- dev_dbg(&dev->dev, "--> PCI D3\n");
- } else {
- dev_dbg(&dev->dev, "PCI D3 suspend fail, %d\n",
- retval);
- pci_restore_state(dev);
- }
+ /* Possibly enable remote wakeup,
+ * choose the appropriate low-power state, and go to that state.
+ */
+ retval = pci_prepare_to_sleep(pci_dev);
+ if (retval == -EIO) { /* Low-power not supported */
+ dev_dbg(dev, "--> PCI D0 legacy\n");
+ retval = 0;
+ } else if (retval == 0) {
+ dev_dbg(dev, "--> PCI %s\n",
+ pci_power_name(pci_dev->current_state));
+ } else {
+ suspend_report_result(pci_prepare_to_sleep, retval);
+ return retval;
}
#ifdef CONFIG_PPC_PMAC
- if (retval == 0) {
- /* Disable ASIC clocks for USB */
- if (machine_is(powermac)) {
- struct device_node *of_node;
-
- of_node = pci_device_to_OF_node(dev);
- if (of_node)
- pmac_call_feature(PMAC_FTR_USB_ENABLE,
- of_node, 0, 0);
- }
+ /* Disable ASIC clocks for USB */
+ if (machine_is(powermac)) {
+ struct device_node *of_node;
+
+ of_node = pci_device_to_OF_node(pci_dev);
+ if (of_node)
+ pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
}
#endif
-
- done:
return retval;
}
-EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend);
-/**
- * usb_hcd_pci_resume - power management resume of a PCI-based HCD
- * @dev: USB Host Controller being resumed
- *
- * Store this function in the HCD's struct pci_driver as .resume.
- */
-int usb_hcd_pci_resume(struct pci_dev *dev)
+static int hcd_pci_resume_noirq(struct device *dev)
{
- struct usb_hcd *hcd;
- int retval;
+ struct pci_dev *pci_dev = to_pci_dev(dev);
#ifdef CONFIG_PPC_PMAC
/* Reenable ASIC clocks for USB */
if (machine_is(powermac)) {
struct device_node *of_node;
- of_node = pci_device_to_OF_node(dev);
+ of_node = pci_device_to_OF_node(pci_dev);
if (of_node)
pmac_call_feature(PMAC_FTR_USB_ENABLE,
of_node, 0, 1);
}
#endif
- pci_restore_state(dev);
+ /* Go back to D0 and disable remote wakeup */
+ pci_back_from_sleep(pci_dev);
+ return 0;
+}
+
+static int resume_common(struct device *dev, bool hibernated)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
+ int retval;
- hcd = pci_get_drvdata(dev);
if (hcd->state != HC_STATE_SUSPENDED) {
- dev_dbg(hcd->self.controller,
- "can't resume, not suspended!\n");
+ dev_dbg(dev, "can't resume, not suspended!\n");
return 0;
}
- pci_enable_wake(dev, PCI_D0, false);
-
- retval = pci_enable_device(dev);
+ retval = pci_enable_device(pci_dev);
if (retval < 0) {
- dev_err(&dev->dev, "can't re-enable after resume, %d!\n",
- retval);
+ dev_err(dev, "can't re-enable after resume, %d!\n", retval);
return retval;
}
- pci_set_master(dev);
-
- /* yes, ignore this result too... */
- (void) pci_wake_from_d3(dev, 0);
+ pci_set_master(pci_dev);
clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
if (hcd->driver->pci_resume) {
retval = hcd->driver->pci_resume(hcd);
if (retval) {
- dev_err(hcd->self.controller,
- "PCI post-resume error %d!\n", retval);
+ dev_err(dev, "PCI post-resume error %d!\n", retval);
usb_hc_died(hcd);
}
}
return retval;
}
-EXPORT_SYMBOL_GPL(usb_hcd_pci_resume);
-
-#endif /* CONFIG_PM */
-/**
- * usb_hcd_pci_shutdown - shutdown host controller
- * @dev: USB Host Controller being shutdown
- */
-void usb_hcd_pci_shutdown(struct pci_dev *dev)
+static int hcd_pci_resume(struct device *dev)
{
- struct usb_hcd *hcd;
-
- hcd = pci_get_drvdata(dev);
- if (!hcd)
- return;
+ return resume_common(dev, false);
+}
- if (hcd->driver->shutdown)
- hcd->driver->shutdown(hcd);
+static int hcd_pci_restore(struct device *dev)
+{
+ return resume_common(dev, true);
}
-EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
+struct dev_pm_ops usb_hcd_pci_pm_ops = {
+ .suspend = hcd_pci_suspend,
+ .suspend_noirq = hcd_pci_suspend_noirq,
+ .resume_noirq = hcd_pci_resume_noirq,
+ .resume = hcd_pci_resume,
+ .freeze = check_root_hub_suspended,
+ .freeze_noirq = check_root_hub_suspended,
+ .thaw_noirq = NULL,
+ .thaw = NULL,
+ .poweroff = hcd_pci_suspend,
+ .poweroff_noirq = hcd_pci_suspend_noirq,
+ .restore_noirq = hcd_pci_resume_noirq,
+ .restore = hcd_pci_restore,
+};
+EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
+
+#endif /* CONFIG_PM_SLEEP */
Index: usb-2.6/drivers/usb/host/ehci-pci.c
===================================================================
--- usb-2.6.orig/drivers/usb/host/ehci-pci.c
+++ usb-2.6/drivers/usb/host/ehci-pci.c
@@ -429,10 +429,11 @@ static struct pci_driver ehci_pci_driver
.probe = usb_hcd_pci_probe,
.remove = usb_hcd_pci_remove,
+ .shutdown = usb_hcd_pci_shutdown,
-#ifdef CONFIG_PM
- .suspend = usb_hcd_pci_suspend,
- .resume = usb_hcd_pci_resume,
+#ifdef CONFIG_PM_SLEEP
+ .driver = {
+ .pm = &usb_hcd_pci_pm_ops
+ },
#endif
- .shutdown = usb_hcd_pci_shutdown,
};
Index: usb-2.6/drivers/usb/host/ohci-pci.c
===================================================================
--- usb-2.6.orig/drivers/usb/host/ohci-pci.c
+++ usb-2.6/drivers/usb/host/ohci-pci.c
@@ -484,12 +484,11 @@ static struct pci_driver ohci_pci_driver
.probe = usb_hcd_pci_probe,
.remove = usb_hcd_pci_remove,
+ .shutdown = usb_hcd_pci_shutdown,
-#ifdef CONFIG_PM
- .suspend = usb_hcd_pci_suspend,
- .resume = usb_hcd_pci_resume,
+#ifdef CONFIG_PM_SLEEP
+ .driver = {
+ .pm = &usb_hcd_pci_pm_ops
+ },
#endif
-
- .shutdown = usb_hcd_pci_shutdown,
};
-
Index: usb-2.6/drivers/usb/host/uhci-hcd.c
===================================================================
--- usb-2.6.orig/drivers/usb/host/uhci-hcd.c
+++ usb-2.6/drivers/usb/host/uhci-hcd.c
@@ -940,10 +940,11 @@ static struct pci_driver uhci_pci_driver
.remove = usb_hcd_pci_remove,
.shutdown = uhci_shutdown,
-#ifdef CONFIG_PM
- .suspend = usb_hcd_pci_suspend,
- .resume = usb_hcd_pci_resume,
-#endif /* PM */
+#ifdef CONFIG_PM_SLEEP
+ .driver = {
+ .pm = &usb_hcd_pci_pm_ops
+ },
+#endif
};
static int __init uhci_hcd_init(void)
--
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