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usb: dwc3: gadget: call gadget driver's ->suspend/->resume

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When going into bus suspend/resume we _must_
call gadget driver's ->suspend/->resume callbacks
accordingly. This patch implements that very feature
which has been missing forever.

Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2014-02-26 10:17:07 -06:00
parent b992e6813e
commit bc5ba2e0b8
1 changed files with 35 additions and 0 deletions
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35
drivers/usb/dwc3/gadget.c
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@ -2028,6 +2028,24 @@ static void dwc3_disconnect_gadget(struct dwc3 *dwc)
}
}
static void dwc3_suspend_gadget(struct dwc3 *dwc)
{
if (dwc->gadget_driver && dwc->gadget_driver->disconnect) {
spin_unlock(&dwc->lock);
dwc->gadget_driver->suspend(&dwc->gadget);
spin_lock(&dwc->lock);
}
}
static void dwc3_resume_gadget(struct dwc3 *dwc)
{
if (dwc->gadget_driver && dwc->gadget_driver->disconnect) {
spin_unlock(&dwc->lock);
dwc->gadget_driver->resume(&dwc->gadget);
spin_lock(&dwc->lock);
}
}
static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force)
{
struct dwc3_ep *dep;
@ -2414,6 +2432,23 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
dwc->link_state = next;
switch (next) {
case DWC3_LINK_STATE_U1:
if (dwc->speed == USB_SPEED_SUPER)
dwc3_suspend_gadget(dwc);
break;
case DWC3_LINK_STATE_U2:
case DWC3_LINK_STATE_U3:
dwc3_suspend_gadget(dwc);
break;
case DWC3_LINK_STATE_RESUME:
dwc3_resume_gadget(dwc);
break;
default:
/* do nothing */
break;
}
dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state);
}