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authorVahram Aharonyan <vahrama@synopsys.com>2016-11-14 19:16:31 -0800
committerFelipe Balbi <felipe.balbi@linux.intel.com>2016-11-18 13:54:46 +0200
commitef750c7142a738d3759f7a644e33fd830b2d6351 (patch)
tree22d797947e64c6f695633ca9e414e832b2b67b38 /drivers/usb/dwc2
parent9d9a6b07ebf5e5f0d72f54e310be881be7ae0803 (diff)
downloadlinux-ef750c7142a738d3759f7a644e33fd830b2d6351.tar.bz2
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 <vahrama@synopsys.com> Signed-off-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2')
-rw-r--r--drivers/usb/dwc2/gadget.c11
1 files 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__);