usb: dwc3: ep0: implement support for Set Isoch Delay request
This is basically a noop for DWC3. We don't have
to do anything. Basically we test if the request
parameters are correct, cache the Isochronous
Delay and return success.
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 9683d98..8d41b6a 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -569,6 +569,28 @@
return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req);
}
+static int dwc3_ep0_set_isoch_delay(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
+{
+ u16 wLength;
+ u16 wValue;
+ u16 wIndex;
+
+ wValue = le16_to_cpu(ctrl->wValue);
+ wLength = le16_to_cpu(ctrl->wLength);
+ wIndex = le16_to_cpu(ctrl->wIndex);
+
+ if (wIndex || wLength)
+ return -EINVAL;
+
+ /*
+ * REVISIT It's unclear from Databook what to do with this
+ * value. For now, just cache it.
+ */
+ dwc->isoch_delay = wValue;
+
+ return 0;
+}
+
static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
{
int ret;
@@ -598,6 +620,10 @@
dev_vdbg(dwc->dev, "USB_REQ_SET_SEL\n");
ret = dwc3_ep0_set_sel(dwc, ctrl);
break;
+ case USB_REQ_SET_ISOCH_DELAY:
+ dev_vdbg(dwc->dev, "USB_REQ_SET_ISOCH_DELAY\n");
+ ret = dwc3_ep0_set_isoch_delay(dwc, ctrl);
+ break;
default:
dev_vdbg(dwc->dev, "Forwarding to gadget driver\n");
ret = dwc3_ep0_delegate_req(dwc, ctrl);