USB: Au1xxx-usb: suspend/resume support.
Copy the OHCI/EHCI PM callbacks of the PCI implementation since they work equally well on Au1xxx hardware. Tested on Au1200. Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Manuel Lauss
Greg Kroah-Hartman
parent
53c81a348f
commit
42bfc7b44f
2 changed files with 161 additions and 25 deletions
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@ -195,29 +195,124 @@ static int ehci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
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return 0;
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}
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/*TBD*/
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/*static int ehci_hcd_au1xxx_drv_suspend(struct device *dev)
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#ifdef CONFIG_PM
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static int ehci_hcd_au1xxx_drv_suspend(struct platform_device *pdev,
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pm_message_t message)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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unsigned long flags;
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int rc;
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return 0;
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rc = 0;
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if (time_before(jiffies, ehci->next_statechange))
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msleep(10);
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/* Root hub was already suspended. Disable irq emission and
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* mark HW unaccessible, bail out if RH has been resumed. Use
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* the spinlock to properly synchronize with possible pending
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* RH suspend or resume activity.
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*
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* This is still racy as hcd->state is manipulated outside of
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* any locks =P But that will be a different fix.
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*/
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spin_lock_irqsave(&ehci->lock, flags);
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if (hcd->state != HC_STATE_SUSPENDED) {
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rc = -EINVAL;
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goto bail;
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}
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ehci_writel(ehci, 0, &ehci->regs->intr_enable);
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(void)ehci_readl(ehci, &ehci->regs->intr_enable);
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/* make sure snapshot being resumed re-enumerates everything */
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if (message.event == PM_EVENT_PRETHAW) {
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ehci_halt(ehci);
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ehci_reset(ehci);
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}
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clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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au1xxx_stop_ehc();
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bail:
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spin_unlock_irqrestore(&ehci->lock, flags);
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// could save FLADJ in case of Vaux power loss
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// ... we'd only use it to handle clock skew
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return rc;
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}
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static int ehci_hcd_au1xxx_drv_resume(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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au1xxx_start_ehc();
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// maybe restore FLADJ
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if (time_before(jiffies, ehci->next_statechange))
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msleep(100);
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/* Mark hardware accessible again as we are out of D3 state by now */
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set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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/* If CF is still set, we maintained PCI Vaux power.
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* Just undo the effect of ehci_pci_suspend().
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*/
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if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) {
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int mask = INTR_MASK;
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if (!hcd->self.root_hub->do_remote_wakeup)
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mask &= ~STS_PCD;
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ehci_writel(ehci, mask, &ehci->regs->intr_enable);
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ehci_readl(ehci, &ehci->regs->intr_enable);
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return 0;
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}
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ehci_dbg(ehci, "lost power, restarting\n");
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usb_root_hub_lost_power(hcd->self.root_hub);
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/* Else reset, to cope with power loss or flush-to-storage
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* style "resume" having let BIOS kick in during reboot.
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*/
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(void) ehci_halt(ehci);
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(void) ehci_reset(ehci);
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/* emptying the schedule aborts any urbs */
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spin_lock_irq(&ehci->lock);
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if (ehci->reclaim)
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end_unlink_async(ehci);
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ehci_work(ehci);
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spin_unlock_irq(&ehci->lock);
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ehci_writel(ehci, ehci->command, &ehci->regs->command);
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ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
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ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
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/* here we "know" root ports should always stay powered */
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ehci_port_power(ehci, 1);
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hcd->state = HC_STATE_SUSPENDED;
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return 0;
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}
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static int ehci_hcd_au1xxx_drv_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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return 0;
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}
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*/
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#else
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#define ehci_hcd_au1xxx_drv_suspend NULL
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#define ehci_hcd_au1xxx_drv_resume NULL
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#endif
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static struct platform_driver ehci_hcd_au1xxx_driver = {
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.probe = ehci_hcd_au1xxx_drv_probe,
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.remove = ehci_hcd_au1xxx_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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/*.suspend = ehci_hcd_au1xxx_drv_suspend, */
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/*.resume = ehci_hcd_au1xxx_drv_resume, */
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.suspend = ehci_hcd_au1xxx_drv_suspend,
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.resume = ehci_hcd_au1xxx_drv_resume,
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.driver = {
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.name = "au1xxx-ehci",
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.owner = THIS_MODULE,
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@ -248,27 +248,68 @@ static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
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return 0;
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}
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/*TBD*/
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/*static int ohci_hcd_au1xxx_drv_suspend(struct platform_device *dev)
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#ifdef CONFIG_PM
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static int ohci_hcd_au1xxx_drv_suspend(struct platform_device *pdev,
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pm_message_t message)
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{
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struct usb_hcd *hcd = platform_get_drvdata(dev);
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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unsigned long flags;
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int rc;
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rc = 0;
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/* Root hub was already suspended. Disable irq emission and
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* mark HW unaccessible, bail out if RH has been resumed. Use
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* the spinlock to properly synchronize with possible pending
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* RH suspend or resume activity.
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*
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* This is still racy as hcd->state is manipulated outside of
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* any locks =P But that will be a different fix.
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*/
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spin_lock_irqsave(&ohci->lock, flags);
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if (hcd->state != HC_STATE_SUSPENDED) {
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rc = -EINVAL;
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goto bail;
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}
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ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
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(void)ohci_readl(ohci, &ohci->regs->intrdisable);
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/* make sure snapshot being resumed re-enumerates everything */
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if (message.event == PM_EVENT_PRETHAW)
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ohci_usb_reset(ohci);
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clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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au1xxx_stop_ohc();
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bail:
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spin_unlock_irqrestore(&ohci->lock, flags);
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return rc;
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}
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static int ohci_hcd_au1xxx_drv_resume(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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au1xxx_start_ohc();
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set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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ohci_finish_controller_resume(hcd);
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return 0;
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}
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static int ohci_hcd_au1xxx_drv_resume(struct platform_device *dev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(dev);
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return 0;
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}
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*/
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#else
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#define ohci_hcd_au1xxx_drv_suspend NULL
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#define ohci_hcd_au1xxx_drv_resume NULL
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#endif
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static struct platform_driver ohci_hcd_au1xxx_driver = {
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.probe = ohci_hcd_au1xxx_drv_probe,
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.remove = ohci_hcd_au1xxx_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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/*.suspend = ohci_hcd_au1xxx_drv_suspend, */
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/*.resume = ohci_hcd_au1xxx_drv_resume, */
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.suspend = ohci_hcd_au1xxx_drv_suspend,
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.resume = ohci_hcd_au1xxx_drv_resume,
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.driver = {
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.name = "au1xxx-ohci",
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.owner = THIS_MODULE,
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