From ef750c7142a738d3759f7a644e33fd830b2d6351 Mon Sep 17 00:00:00 2001 From: Vahram Aharonyan Date: Mon, 14 Nov 2016 19:16:31 -0800 Subject: [PATCH] usb: dwc2: gadget: Start DDMA IN status phase in StsPhseRcvd handler In DDMA mode of operation IN status phase of control write transfer should start after getting StsPhseRcvd interrupt. This interrupt is issued by HW once host starts to send IN tokens after data stage. Signed-off-by: Vahram Aharonyan Signed-off-by: John Youn Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/gadget.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index bcae58d72ea0..e5d095924fb4 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -1991,7 +1991,9 @@ static void dwc2_hsotg_handle_outdone(struct dwc2_hsotg *hsotg, int epnum) */ } - if (epnum == 0 && hsotg->ep0_state == DWC2_EP0_DATA_OUT) { + /* DDMA IN status phase will start from StsPhseRcvd interrupt */ + if (!using_desc_dma(hsotg) && epnum == 0 && + hsotg->ep0_state == DWC2_EP0_DATA_OUT) { /* Move to STATUS IN */ dwc2_hsotg_ep0_zlp(hsotg, true); return; @@ -2614,9 +2616,14 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx, } } - if (ints & DXEPINT_STSPHSERCVD) + if (ints & DXEPINT_STSPHSERCVD) { dev_dbg(hsotg->dev, "%s: StsPhseRcvd\n", __func__); + /* Move to STATUS IN for DDMA */ + if (using_desc_dma(hsotg)) + dwc2_hsotg_ep0_zlp(hsotg, true); + } + if (ints & DXEPINT_BACK2BACKSETUP) dev_dbg(hsotg->dev, "%s: B2BSetup/INEPNakEff\n", __func__);