On 08/07/15 16:11, Sergei Shtylyov wrote:
> Hello.
>
> On 7/8/2015 1:37 PM, 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 <rogerq@xxxxxx>
>> ---
>> 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 e3c094d..3784287 100644
>> --- a/drivers/usb/dwc3/core.c
>> +++ b/drivers/usb/dwc3/core.c
>> @@ -1444,18 +1444,15 @@ 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);
>> }
>>
>> - 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))
>
> Hum, enclosing the first == op into parens and not doing it to the second == op doesn't look very consistent... :-)
Agreed :). Will fix it. Thanks.
>
> [...]
>> @@ -1495,18 +1492,12 @@ 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))
>
> Same here...
OK.
>
> [...]
>
cheers,
-roger
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