On Wed, Sep 02, 2015 at 05:24:24PM +0300, Roger Quadros wrote: > We can't rely just on dr_mode to decide if we're in host or gadget > mode when we're configured as otg/dual-role. So while dr_mode is > OTG, we find out from the otg state machine if we're in host > or gadget mode and take the necessary actions during suspend/resume. > > Also make sure that we disable OTG irq and events during system suspend > so that we don't lockup the system during system suspend/resume. > > Signed-off-by: Roger Quadros <[email protected]> > --- > drivers/usb/dwc3/core.c | 27 +++++++++------------------ > 1 file changed, 9 insertions(+), 18 deletions(-) > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c > index 654aebf..25891e3 100644 > --- a/drivers/usb/dwc3/core.c > +++ b/drivers/usb/dwc3/core.c > @@ -1455,18 +1455,15 @@ static int dwc3_suspend(struct device *dev) > dwc->octl = dwc3_readl(dwc->regs, DWC3_OCTL); > dwc->oevt = dwc3_readl(dwc->regs, DWC3_OEVT); > dwc->oevten = dwc3_readl(dwc->regs, DWC3_OEVTEN); > + dwc3_writel(dwc->regs, DWC3_OEVTEN, 0); > + disable_irq(dwc->otg_irq);
you don't need disable_irq() here. In fact, it causes problems since
you're calling it with IRQs disabled.
> }
>
> - switch (dwc->dr_mode) {
> - case USB_DR_MODE_PERIPHERAL:
> - case USB_DR_MODE_OTG:
> + if (dwc->dr_mode == USB_DR_MODE_PERIPHERAL ||
> + ((dwc->dr_mode == USB_DR_MODE_OTG) && (dwc->fsm->protocol ==
> PROTO_GADGET)))
> dwc3_gadget_suspend(dwc);
> - /* FALLTHROUGH */
> - case USB_DR_MODE_HOST:
> - default:
> - dwc3_event_buffers_cleanup(dwc);
> - break;
> - }
> +
> + dwc3_event_buffers_cleanup(dwc);
>
> dwc->gctl = dwc3_readl(dwc->regs, DWC3_GCTL);
> spin_unlock_irqrestore(&dwc->lock, flags);
> @@ -1506,18 +1503,12 @@ static int dwc3_resume(struct device *dev)
> dwc3_writel(dwc->regs, DWC3_OCTL, dwc->octl);
> dwc3_writel(dwc->regs, DWC3_OEVT, dwc->oevt);
> dwc3_writel(dwc->regs, DWC3_OEVTEN, dwc->oevten);
> + enable_irq(dwc->otg_irq);
> }
>
> - switch (dwc->dr_mode) {
> - case USB_DR_MODE_PERIPHERAL:
> - case USB_DR_MODE_OTG:
> + if (dwc->dr_mode == USB_DR_MODE_PERIPHERAL ||
> + ((dwc->dr_mode == USB_DR_MODE_OTG) && (dwc->fsm->protocol ==
> PROTO_GADGET)))
> dwc3_gadget_resume(dwc);
> - /* FALLTHROUGH */
> - case USB_DR_MODE_HOST:
> - default:
> - /* do nothing */
> - break;
> - }
>
> spin_unlock_irqrestore(&dwc->lock, flags);
>
> --
> 2.1.4
>
--
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