usb: dwc3: ep0: use immediate SETUP on TRB
If we pass TRB's own address on bpl/bph fields, we can get our SETUP
packet as immediate data on the TRB itself, without having to allocate
extra memory for it.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index e689ced..da5e085 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -283,7 +283,7 @@ void dwc3_ep0_out_start(struct dwc3 *dwc)
complete(&dwc->ep0_in_setup);
- dwc3_ep0_prepare_one_trb(dwc, 0, dwc->ctrl_req_addr, 8,
+ dwc3_ep0_prepare_one_trb(dwc, 0, dwc->ep0_trb_addr, 8,
DWC3_TRBCTL_CONTROL_SETUP, false);
ret = dwc3_ep0_start_trans(dwc, 0);
WARN_ON(ret < 0);
@@ -794,7 +794,7 @@ static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
const struct dwc3_event_depevt *event)
{
- struct usb_ctrlrequest *ctrl = dwc->ctrl_req;
+ struct usb_ctrlrequest *ctrl = (void *) dwc->ep0_trb;
int ret = -EINVAL;
u32 len;
@@ -916,7 +916,7 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
dwc->ep0_next_event = DWC3_EP0_COMPLETE;
- dwc3_ep0_prepare_one_trb(dwc, epnum, dwc->ctrl_req_addr,
+ dwc3_ep0_prepare_one_trb(dwc, epnum, dwc->ep0_trb_addr,
0, DWC3_TRBCTL_CONTROL_DATA, false);
ret = dwc3_ep0_start_trans(dwc, epnum);
WARN_ON(ret < 0);
@@ -997,8 +997,9 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
req->direction = !!dep->number;
if (req->request.length == 0) {
+
dwc3_ep0_prepare_one_trb(dwc, dep->number,
- dwc->ctrl_req_addr, 0,
+ dwc->ep0_trb_addr, 0,
DWC3_TRBCTL_CONTROL_DATA, false);
ret = dwc3_ep0_start_trans(dwc, dep->number);
} else if (!IS_ALIGNED(req->request.length, dep->endpoint.maxpacket)
@@ -1056,7 +1057,7 @@ static int dwc3_ep0_start_control_status(struct dwc3_ep *dep)
: DWC3_TRBCTL_CONTROL_STATUS2;
dwc3_ep0_prepare_one_trb(dwc, dep->number,
- dwc->ctrl_req_addr, 0, type, false);
+ dwc->ep0_trb_addr, 0, type, false);
return dwc3_ep0_start_trans(dwc, dep->number);
}
