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usb: dwc2: Fix control OUT transfer issue

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In buffer DMA mode, gadget should re-configure EP 0 to received SETUP
packets when doeptsiz.xfersize is equal to a setup packet size(8 bytes)
and EP 0 is in WAIT_FOR_SETUP state.

Since EP 0 is not enabled in WAIT_FOR_SETUP state, SETUP packets is NOT
received from RxFifo and wriiten to the external memory.

Signed-off-by: Chance.Yang <chance.yang@vatics.com>
This commit is contained in:
Chance.Yang 2020-10-06 10:55:49 +08:00 committed by Marek Vasut
parent 3fade88686
commit 3065680235
1 changed files with 13 additions and 3 deletions
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16
drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
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@ -421,6 +421,9 @@ static void process_ep_out_intr(struct dwc2_udc *dev)
{ {
u32 ep_intr, ep_intr_status; u32 ep_intr, ep_intr_status;
u8 ep_num = 0; u8 ep_num = 0;
u32 ep_tsr = 0, xfer_size = 0;
u32 epsiz_reg = reg->out_endp[ep_num].doeptsiz;
u32 req_size = sizeof(struct usb_ctrlrequest);
ep_intr = readl(&reg->daint); ep_intr = readl(&reg->daint);
debug_cond(DEBUG_OUT_EP != 0, debug_cond(DEBUG_OUT_EP != 0,
@ -441,10 +444,17 @@ static void process_ep_out_intr(struct dwc2_udc *dev)
if (ep_num == 0) { if (ep_num == 0) {
if (ep_intr_status & TRANSFER_DONE) { if (ep_intr_status & TRANSFER_DONE) {
if (dev->ep0state != ep_tsr = readl(&epsiz_reg);
WAIT_FOR_OUT_COMPLETE) xfer_size = ep_tsr &
DOEPT_SIZ_XFER_SIZE_MAX_EP0;
if (xfer_size == req_size &&
dev->ep0state == WAIT_FOR_SETUP) {
dwc2_udc_pre_setup();
} else if (dev->ep0state !=
WAIT_FOR_OUT_COMPLETE) {
complete_rx(dev, ep_num); complete_rx(dev, ep_num);
else { } else {
dev->ep0state = WAIT_FOR_SETUP; dev->ep0state = WAIT_FOR_SETUP;
dwc2_udc_pre_setup(); dwc2_udc_pre_setup();
} }