diff options
| author | Gregory Herrero <gregory.herrero@intel.com> | 2015-04-29 22:09:06 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-04-29 15:19:08 -0500 |
| commit | 4876886fb95f93c8b09381ffbdac969d1a1fee0d (patch) | |
| tree | a6e44520258f75226e91d44679426369ab22c756 /drivers | |
| parent | ecb176c63ac49ddcea83b0171ead1372bb78c165 (diff) | |
usb: dwc2: gadget: use reset detect interrupt
ResetDet interrupt is used to detect a reset of the bus
while the controller is suspended.
This may happens for example when using Command Verifier.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index bed56dc27fdc..f867e954764f 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -2308,8 +2308,9 @@ void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg, writel(GINTSTS_ERLYSUSP | GINTSTS_SESSREQINT | GINTSTS_GOUTNAKEFF | GINTSTS_GINNAKEFF | GINTSTS_CONIDSTSCHNG | GINTSTS_USBRST | - GINTSTS_ENUMDONE | GINTSTS_OTGINT | - GINTSTS_USBSUSP | GINTSTS_WKUPINT, + GINTSTS_RESETDET | GINTSTS_ENUMDONE | + GINTSTS_OTGINT | GINTSTS_USBSUSP | + GINTSTS_WKUPINT, hsotg->regs + GINTMSK); if (using_dma(hsotg)) @@ -2475,7 +2476,19 @@ irq_retry: } } - if (gintsts & GINTSTS_USBRST) { + if (gintsts & GINTSTS_RESETDET) { + dev_dbg(hsotg->dev, "%s: USBRstDet\n", __func__); + + writel(GINTSTS_RESETDET, hsotg->regs + GINTSTS); + + /* This event must be used only if controller is suspended */ + if (hsotg->lx_state == DWC2_L2) { + dwc2_exit_hibernation(hsotg, true); + hsotg->lx_state = DWC2_L0; + } + } + + if (gintsts & (GINTSTS_USBRST | GINTSTS_RESETDET)) { u32 usb_status = readl(hsotg->regs + GOTGCTL); |