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 2008-06-23 09:09:37 +02:00 committed by Greg Kroah-Hartman
parent 53c81a348f
commit 42bfc7b44f
2 changed files with 161 additions and 25 deletions

View File

@ -195,29 +195,124 @@ static int ehci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
return 0;
}
/*TBD*/
/*static int ehci_hcd_au1xxx_drv_suspend(struct device *dev)
#ifdef CONFIG_PM
static int ehci_hcd_au1xxx_drv_suspend(struct platform_device *pdev,
pm_message_t message)
{
struct platform_device *pdev = to_platform_device(dev);
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
unsigned long flags;
int rc;
return 0;
rc = 0;
if (time_before(jiffies, ehci->next_statechange))
msleep(10);
/* Root hub was already suspended. Disable irq emission and
* mark HW unaccessible, bail out if RH has been resumed. Use
* the spinlock to properly synchronize with possible pending
* RH suspend or resume activity.
*
* This is still racy as hcd->state is manipulated outside of
* any locks =P But that will be a different fix.
*/
spin_lock_irqsave(&ehci->lock, flags);
if (hcd->state != HC_STATE_SUSPENDED) {
rc = -EINVAL;
goto bail;
}
ehci_writel(ehci, 0, &ehci->regs->intr_enable);
(void)ehci_readl(ehci, &ehci->regs->intr_enable);
/* make sure snapshot being resumed re-enumerates everything */
if (message.event == PM_EVENT_PRETHAW) {
ehci_halt(ehci);
ehci_reset(ehci);
}
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
au1xxx_stop_ehc();
bail:
spin_unlock_irqrestore(&ehci->lock, flags);
// could save FLADJ in case of Vaux power loss
// ... we'd only use it to handle clock skew
return rc;
}
static int ehci_hcd_au1xxx_drv_resume(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
au1xxx_start_ehc();
// maybe restore FLADJ
if (time_before(jiffies, ehci->next_statechange))
msleep(100);
/* Mark hardware accessible again as we are out of D3 state by now */
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
/* If CF is still set, we maintained PCI Vaux power.
* Just undo the effect of ehci_pci_suspend().
*/
if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) {
int mask = INTR_MASK;
if (!hcd->self.root_hub->do_remote_wakeup)
mask &= ~STS_PCD;
ehci_writel(ehci, mask, &ehci->regs->intr_enable);
ehci_readl(ehci, &ehci->regs->intr_enable);
return 0;
}
ehci_dbg(ehci, "lost power, restarting\n");
usb_root_hub_lost_power(hcd->self.root_hub);
/* Else reset, to cope with power loss or flush-to-storage
* style "resume" having let BIOS kick in during reboot.
*/
(void) ehci_halt(ehci);
(void) ehci_reset(ehci);
/* emptying the schedule aborts any urbs */
spin_lock_irq(&ehci->lock);
if (ehci->reclaim)
end_unlink_async(ehci);
ehci_work(ehci);
spin_unlock_irq(&ehci->lock);
ehci_writel(ehci, ehci->command, &ehci->regs->command);
ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
/* here we "know" root ports should always stay powered */
ehci_port_power(ehci, 1);
hcd->state = HC_STATE_SUSPENDED;
return 0;
}
static int ehci_hcd_au1xxx_drv_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct usb_hcd *hcd = dev_get_drvdata(dev);
return 0;
}
*/
#else
#define ehci_hcd_au1xxx_drv_suspend NULL
#define ehci_hcd_au1xxx_drv_resume NULL
#endif
static struct platform_driver ehci_hcd_au1xxx_driver = {
.probe = ehci_hcd_au1xxx_drv_probe,
.remove = ehci_hcd_au1xxx_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
/*.suspend = ehci_hcd_au1xxx_drv_suspend, */
/*.resume = ehci_hcd_au1xxx_drv_resume, */
.suspend = ehci_hcd_au1xxx_drv_suspend,
.resume = ehci_hcd_au1xxx_drv_resume,
.driver = {
.name = "au1xxx-ehci",
.owner = THIS_MODULE,

View File

@ -248,27 +248,68 @@ static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
return 0;
}
/*TBD*/
/*static int ohci_hcd_au1xxx_drv_suspend(struct platform_device *dev)
#ifdef CONFIG_PM
static int ohci_hcd_au1xxx_drv_suspend(struct platform_device *pdev,
pm_message_t message)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
unsigned long flags;
int rc;
rc = 0;
/* Root hub was already suspended. Disable irq emission and
* mark HW unaccessible, bail out if RH has been resumed. Use
* the spinlock to properly synchronize with possible pending
* RH suspend or resume activity.
*
* This is still racy as hcd->state is manipulated outside of
* any locks =P But that will be a different fix.
*/
spin_lock_irqsave(&ohci->lock, flags);
if (hcd->state != HC_STATE_SUSPENDED) {
rc = -EINVAL;
goto bail;
}
ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
(void)ohci_readl(ohci, &ohci->regs->intrdisable);
/* make sure snapshot being resumed re-enumerates everything */
if (message.event == PM_EVENT_PRETHAW)
ohci_usb_reset(ohci);
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
au1xxx_stop_ohc();
bail:
spin_unlock_irqrestore(&ohci->lock, flags);
return rc;
}
static int ohci_hcd_au1xxx_drv_resume(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
au1xxx_start_ohc();
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
ohci_finish_controller_resume(hcd);
return 0;
}
static int ohci_hcd_au1xxx_drv_resume(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
return 0;
}
*/
#else
#define ohci_hcd_au1xxx_drv_suspend NULL
#define ohci_hcd_au1xxx_drv_resume NULL
#endif
static struct platform_driver ohci_hcd_au1xxx_driver = {
.probe = ohci_hcd_au1xxx_drv_probe,
.remove = ohci_hcd_au1xxx_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
/*.suspend = ohci_hcd_au1xxx_drv_suspend, */
/*.resume = ohci_hcd_au1xxx_drv_resume, */
.suspend = ohci_hcd_au1xxx_drv_suspend,
.resume = ohci_hcd_au1xxx_drv_resume,
.driver = {
.name = "au1xxx-ohci",
.owner = THIS_MODULE,