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usb: dwc2: gadget: use reset detect interrupt

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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>
This commit is contained in:
Gregory Herrero 2015-04-29 22:09:06 +02:00 • committed by Felipe Balbi
parent ecb176c63a
commit 4876886fb9
1 changed files with 16 additions and 3 deletions
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19
drivers/usb/dwc2/gadget.c
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@ -2308,8 +2308,9 @@ void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
writel(GINTSTS_ERLYSUSP | GINTSTS_SESSREQINT | writel(GINTSTS_ERLYSUSP | GINTSTS_SESSREQINT |
GINTSTS_GOUTNAKEFF | GINTSTS_GINNAKEFF | GINTSTS_GOUTNAKEFF | GINTSTS_GINNAKEFF |
GINTSTS_CONIDSTSCHNG | GINTSTS_USBRST | GINTSTS_CONIDSTSCHNG | GINTSTS_USBRST |
GINTSTS_ENUMDONE | GINTSTS_OTGINT | GINTSTS_RESETDET | GINTSTS_ENUMDONE |
GINTSTS_USBSUSP | GINTSTS_WKUPINT, GINTSTS_OTGINT | GINTSTS_USBSUSP |
GINTSTS_WKUPINT,
hsotg->regs + GINTMSK); hsotg->regs + GINTMSK);
if (using_dma(hsotg)) 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); u32 usb_status = readl(hsotg->regs + GOTGCTL);