diff options
Diffstat (limited to 'drivers/usb/core/generic.c')
| -rw-r--r-- | drivers/usb/core/generic.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c index 539a2c0dde00..66e8a424c9f4 100644 --- a/drivers/usb/core/generic.c +++ b/drivers/usb/core/generic.c @@ -196,6 +196,7 @@ extern void usb_host_set_wakeup(struct device *wkup_dev, bool para); static int generic_suspend(struct usb_device *udev, pm_message_t msg) { int rc; + u32 temp; /* Normal USB devices suspend through their upstream port. * Root hubs don't have upstream ports to suspend, @@ -203,7 +204,25 @@ static int generic_suspend(struct usb_device *udev, pm_message_t msg) * interfaces manually by doing a bus (or "global") suspend. */ if (!udev->parent) { + struct usb_hcd *hcd = + container_of(udev->bus, struct usb_hcd, self); + struct fsl_usb2_platform_data *pdata; + pdata = hcd->self.controller->platform_data; + rc = hcd_bus_suspend(udev, msg); + + if (device_may_wakeup(hcd->self.controller)) { + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + /* enable remote wake up irq */ + usb_host_set_wakeup(hcd->self.controller, true); + + /* Put PHY into low power mode */ + temp = readl(hcd->regs + 0x184); + writel(temp | (1 << 23), (hcd->regs + 0x184)); + + if (pdata->usb_clock_for_pm) + pdata->usb_clock_for_pm(false); + } /* Non-root devices don't need to do anything for FREEZE or PRETHAW */ } else if (msg.event == PM_EVENT_FREEZE || msg.event == PM_EVENT_PRETHAW) @@ -217,6 +236,7 @@ static int generic_suspend(struct usb_device *udev, pm_message_t msg) static int generic_resume(struct usb_device *udev, pm_message_t msg) { int rc; + u32 temp; /* Normal USB devices resume/reset through their upstream port. * Root hubs don't have upstream ports to resume or reset, @@ -224,6 +244,13 @@ static int generic_resume(struct usb_device *udev, pm_message_t msg) * interfaces manually by doing a bus (or "global") resume. */ if (!udev->parent) { + struct usb_hcd *hcd = + container_of(udev->bus, struct usb_hcd, self); + + if (device_may_wakeup(hcd->self.controller)) { + temp = readl(hcd->regs + 0x184); + writel(temp & (~(1 << 23)), (hcd->regs + 0x184)); + } rc = hcd_bus_resume(udev, msg); } else rc = usb_port_resume(udev, msg); |