/*
* (C) Copyright David Brownell 2000-2002
- *
+ *
* 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
*
* Store this function in the HCD's struct pci_driver as probe().
*/
-int usb_hcd_pci_probe (struct pci_dev *dev, const struct pci_device_id *id)
+int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
struct hc_driver *driver;
struct usb_hcd *hcd;
if (usb_disabled())
return -ENODEV;
- if (!id || !(driver = (struct hc_driver *) id->driver_data))
+ if (!id)
+ return -EINVAL;
+ driver = (struct hc_driver *)id->driver_data;
+ if (!driver)
return -EINVAL;
- if (pci_enable_device (dev) < 0)
+ if (pci_enable_device(dev) < 0)
return -ENODEV;
dev->current_state = PCI_D0;
- dev->dev.power.power_state = PMSG_ON;
-
- if (!dev->irq) {
- dev_err (&dev->dev,
+
+ if (!dev->irq) {
+ dev_err(&dev->dev,
"Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
pci_name(dev));
- retval = -ENODEV;
+ retval = -ENODEV;
goto err1;
- }
+ }
- hcd = usb_create_hcd (driver, &dev->dev, pci_name(dev));
+ hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
if (!hcd) {
retval = -ENOMEM;
goto err1;
}
- if (driver->flags & HCD_MEMORY) { // EHCI, OHCI
- hcd->rsrc_start = pci_resource_start (dev, 0);
- hcd->rsrc_len = pci_resource_len (dev, 0);
- if (!request_mem_region (hcd->rsrc_start, hcd->rsrc_len,
+ if (driver->flags & HCD_MEMORY) {
+ /* EHCI, OHCI */
+ hcd->rsrc_start = pci_resource_start(dev, 0);
+ hcd->rsrc_len = pci_resource_len(dev, 0);
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
driver->description)) {
- dev_dbg (&dev->dev, "controller already in use\n");
+ dev_dbg(&dev->dev, "controller already in use\n");
retval = -EBUSY;
goto err2;
}
- hcd->regs = ioremap_nocache (hcd->rsrc_start, hcd->rsrc_len);
+ hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
if (hcd->regs == NULL) {
- dev_dbg (&dev->dev, "error mapping memory\n");
+ dev_dbg(&dev->dev, "error mapping memory\n");
retval = -EFAULT;
goto err3;
}
- } else { // UHCI
+ } else {
+ /* UHCI */
int region;
for (region = 0; region < PCI_ROM_RESOURCE; region++) {
- if (!(pci_resource_flags (dev, region) &
+ if (!(pci_resource_flags(dev, region) &
IORESOURCE_IO))
continue;
- hcd->rsrc_start = pci_resource_start (dev, region);
- hcd->rsrc_len = pci_resource_len (dev, region);
- if (request_region (hcd->rsrc_start, hcd->rsrc_len,
+ hcd->rsrc_start = pci_resource_start(dev, region);
+ hcd->rsrc_len = pci_resource_len(dev, region);
+ if (request_region(hcd->rsrc_start, hcd->rsrc_len,
driver->description))
break;
}
if (region == PCI_ROM_RESOURCE) {
- dev_dbg (&dev->dev, "no i/o regions available\n");
+ dev_dbg(&dev->dev, "no i/o regions available\n");
retval = -EBUSY;
goto err1;
}
}
- pci_set_master (dev);
+ pci_set_master(dev);
retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
if (retval != 0)
err4:
if (driver->flags & HCD_MEMORY) {
- iounmap (hcd->regs);
+ iounmap(hcd->regs);
err3:
- release_mem_region (hcd->rsrc_start, hcd->rsrc_len);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
} else
- release_region (hcd->rsrc_start, hcd->rsrc_len);
+ release_region(hcd->rsrc_start, hcd->rsrc_len);
err2:
- usb_put_hcd (hcd);
+ usb_put_hcd(hcd);
err1:
- pci_disable_device (dev);
- dev_err (&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
+ pci_disable_device(dev);
+ dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
return retval;
-}
-EXPORT_SYMBOL (usb_hcd_pci_probe);
+}
+EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);
/* may be called without controller electrically present */
*
* Store this function in the HCD's struct pci_driver as remove().
*/
-void usb_hcd_pci_remove (struct pci_dev *dev)
+void usb_hcd_pci_remove(struct pci_dev *dev)
{
struct usb_hcd *hcd;
if (!hcd)
return;
- usb_remove_hcd (hcd);
+ usb_remove_hcd(hcd);
if (hcd->driver->flags & HCD_MEMORY) {
- iounmap (hcd->regs);
- release_mem_region (hcd->rsrc_start, hcd->rsrc_len);
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
} else {
- release_region (hcd->rsrc_start, hcd->rsrc_len);
+ release_region(hcd->rsrc_start, hcd->rsrc_len);
}
- usb_put_hcd (hcd);
+ usb_put_hcd(hcd);
pci_disable_device(dev);
}
-EXPORT_SYMBOL (usb_hcd_pci_remove);
+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: semantics in flux
+ * @message: Power Management message describing this state transition
*
- * Store this function in the HCD's struct pci_driver as suspend().
+ * Store this function in the HCD's struct pci_driver as .suspend.
*/
-int usb_hcd_pci_suspend (struct pci_dev *dev, pm_message_t message)
+int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
{
- struct usb_hcd *hcd;
+ struct usb_hcd *hcd = pci_get_drvdata(dev);
int retval = 0;
+ int wake, w;
int has_pci_pm;
- hcd = pci_get_drvdata(dev);
-
/* 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
* otherwise the swsusp will save (and restore) garbage state.
*/
if (!(hcd->state == HC_STATE_SUSPENDED ||
- hcd->state == HC_STATE_HALT))
- return -EBUSY;
+ hcd->state == HC_STATE_HALT)) {
+ dev_warn(&dev->dev, "Root hub is not suspended\n");
+ retval = -EBUSY;
+ goto done;
+ }
+
+ /* We might already be suspended (runtime PM -- not yet written) */
+ if (dev->current_state != PCI_D0)
+ goto done;
- if (hcd->driver->suspend) {
- retval = hcd->driver->suspend(hcd, message);
- suspend_report_result(hcd->driver->suspend, retval);
+ if (hcd->driver->pci_suspend) {
+ retval = hcd->driver->pci_suspend(hcd, message);
+ suspend_report_result(hcd->driver->pci_suspend, retval);
if (retval)
goto done;
}
- synchronize_irq(dev->irq);
-
- /* FIXME until the generic PM interfaces change a lot more, this
- * can't use PCI D1 and D2 states. For example, the confusion
- * between messages and states will need to vanish, and messages
- * will need to provide a target system state again.
- *
- * It'll be important to learn characteristics of the target state,
- * especially on embedded hardware where the HCD will often be in
- * charge of an external VBUS power supply and one or more clocks.
- * Some target system states will leave them active; others won't.
- * (With PCI, that's often handled by platform BIOS code.)
- */
- /* even when the PCI layer rejects some of the PCI calls
- * below, HCs can try global suspend and reduce DMA traffic.
- * PM-sensitive HCDs may already have done this.
- */
- has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
+ synchronize_irq(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.
*/
- if (hcd->state == HC_STATE_SUSPENDED) {
+ pci_disable_device(dev);
- /* no DMA or IRQs except when HC is active */
- if (dev->current_state == PCI_D0) {
- pci_save_state (dev);
- pci_disable_device (dev);
- }
+ pci_save_state(dev);
- if (message.event == PM_EVENT_FREEZE ||
- message.event == PM_EVENT_PRETHAW) {
- dev_dbg(hcd->self.controller, "--> no state change\n");
- goto done;
- }
+ /* 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.
+ */
+ 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;
+ }
- if (!has_pci_pm) {
- dev_dbg (hcd->self.controller, "--> PCI D0/legacy\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 {
/* 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);
+ retval = pci_set_power_state(dev, PCI_D3hot);
suspend_report_result(pci_set_power_state, retval);
if (retval == 0) {
- int wake = device_can_wakeup(&hcd->self.root_hub->dev);
-
- wake = wake && device_may_wakeup(hcd->self.controller);
-
- dev_dbg (hcd->self.controller, "--> PCI D3%s\n",
- wake ? "/wakeup" : "");
-
- /* Ignore these return values. We rely on pci code to
- * reject requests the hardware can't implement, rather
- * than coding the same thing.
- */
- (void) pci_enable_wake (dev, PCI_D3hot, wake);
- (void) pci_enable_wake (dev, PCI_D3cold, wake);
+ dev_dbg(&dev->dev, "--> PCI D3\n");
} else {
- dev_dbg (&dev->dev, "PCI D3 suspend fail, %d\n",
+ dev_dbg(&dev->dev, "PCI D3 suspend fail, %d\n",
retval);
- (void) usb_hcd_pci_resume (dev);
+ pci_restore_state(dev);
}
-
- } else if (hcd->state != HC_STATE_HALT) {
- dev_dbg (hcd->self.controller, "hcd state %d; not suspended\n",
- hcd->state);
- WARN_ON(1);
- retval = -EINVAL;
}
-done:
- if (retval == 0) {
- dev->dev.power.power_state = PMSG_SUSPEND;
-
#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);
+ of_node = pci_device_to_OF_node(dev);
if (of_node)
pmac_call_feature(PMAC_FTR_USB_ENABLE,
of_node, 0, 0);
}
-#endif
}
+#endif
+ done:
return retval;
}
-EXPORT_SYMBOL (usb_hcd_pci_suspend);
+EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend);
+
+/**
+ * usb_hcd_pci_resume_early - resume a PCI-based HCD before IRQs are enabled
+ * @dev: USB Host Controller being resumed
+ *
+ * Store this function in the HCD's struct pci_driver as .resume_early.
+ */
+int usb_hcd_pci_resume_early(struct pci_dev *dev)
+{
+ pci_restore_state(dev);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usb_hcd_pci_resume_early);
/**
* 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().
+ * Store this function in the HCD's struct pci_driver as .resume.
*/
-int usb_hcd_pci_resume (struct pci_dev *dev)
+int usb_hcd_pci_resume(struct pci_dev *dev)
{
struct usb_hcd *hcd;
int retval;
- hcd = pci_get_drvdata(dev);
- if (hcd->state != HC_STATE_SUSPENDED) {
- dev_dbg (hcd->self.controller,
- "can't resume, not suspended!\n");
- return 0;
- }
-
#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(dev);
if (of_node)
- pmac_call_feature (PMAC_FTR_USB_ENABLE,
+ pmac_call_feature(PMAC_FTR_USB_ENABLE,
of_node, 0, 1);
}
#endif
- /* NOTE: chip docs cover clean "real suspend" cases (what Linux
- * calls "standby", "suspend to RAM", and so on). There are also
- * dirty cases when swsusp fakes a suspend in "shutdown" mode.
- */
- if (dev->current_state != PCI_D0) {
-#ifdef DEBUG
- int pci_pm;
- u16 pmcr;
-
- pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
- pci_read_config_word(dev, pci_pm + PCI_PM_CTRL, &pmcr);
- pmcr &= PCI_PM_CTRL_STATE_MASK;
- if (pmcr) {
- /* Clean case: power to USB and to HC registers was
- * maintained; remote wakeup is easy.
- */
- dev_dbg(hcd->self.controller, "resume from PCI D%d\n",
- pmcr);
- } else {
- /* Clean: HC lost Vcc power, D0 uninitialized
- * + Vaux may have preserved port and transceiver
- * state ... for remote wakeup from D3cold
- * + or not; HCD must reinit + re-enumerate
- *
- * Dirty: D0 semi-initialized cases with swsusp
- * + after BIOS init
- * + after Linux init (HCD statically linked)
- */
- dev_dbg(hcd->self.controller,
- "PCI D0, from previous PCI D%d\n",
- dev->current_state);
- }
-#endif
- /* yes, ignore these results too... */
- (void) pci_enable_wake (dev, dev->current_state, 0);
- (void) pci_enable_wake (dev, PCI_D3cold, 0);
- } else {
- /* Same basic cases: clean (powered/not), dirty */
- dev_dbg(hcd->self.controller, "PCI legacy resume\n");
+ hcd = pci_get_drvdata(dev);
+ if (hcd->state != HC_STATE_SUSPENDED) {
+ dev_dbg(hcd->self.controller,
+ "can't resume, not suspended!\n");
+ return 0;
}
- /* NOTE: the PCI API itself is asymmetric here. We don't need to
- * pci_set_power_state(PCI_D0) since that's part of re-enabling;
- * but that won't re-enable bus mastering. Yet pci_disable_device()
- * explicitly disables bus mastering...
- */
- retval = pci_enable_device (dev);
+ pci_enable_wake(dev, PCI_D0, false);
+
+ retval = pci_enable_device(dev);
if (retval < 0) {
- dev_err (hcd->self.controller,
- "can't re-enable after resume, %d!\n", retval);
+ dev_err(&dev->dev, "can't re-enable after resume, %d!\n",
+ retval);
return retval;
}
- pci_set_master (dev);
- pci_restore_state (dev);
- dev->dev.power.power_state = PMSG_ON;
+ pci_set_master(dev);
+
+ /* yes, ignore this result too... */
+ (void) pci_wake_from_d3(dev, 0);
clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
- if (hcd->driver->resume) {
- retval = hcd->driver->resume(hcd);
+ if (hcd->driver->pci_resume) {
+ retval = hcd->driver->pci_resume(hcd);
if (retval) {
- dev_err (hcd->self.controller,
+ dev_err(hcd->self.controller,
"PCI post-resume error %d!\n", retval);
- usb_hc_died (hcd);
+ usb_hc_died(hcd);
}
}
-
return retval;
}
-EXPORT_SYMBOL (usb_hcd_pci_resume);
+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)
+void usb_hcd_pci_shutdown(struct pci_dev *dev)
{
struct usb_hcd *hcd;
if (hcd->driver->shutdown)
hcd->driver->shutdown(hcd);
}
-EXPORT_SYMBOL (usb_hcd_pci_shutdown);
+EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
projects / linux-2.6-omap-h63xx.git / blobdiff