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Commit 4876886f authored by Gregory Herrero's avatar Gregory Herrero Committed by Felipe Balbi
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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: default avatarJohn Youn <johnyoun@synopsys.com>
Signed-off-by: default avatarGregory Herrero <gregory.herrero@intel.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent ecb176c6

drivers/usb/dwc2/gadget.c

+16 −3
Original line number Diff line number Diff line
@@ -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 @@ static irqreturn_t s3c_hsotg_irq(int irq, void *pw) 
		}

	}



	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);