usb: gadget: autoconf: net2280: match hardware and usb ep address

USB3380 GPEP can be used in IN and OUT directions however, both
directions should use same endpoint address. Fulfil this requirement
by mapping usb endpoint to hardware endpoint with the same address.
Tested-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/epautoconf.c

@@ -258,15 +258,25 @@ struct usb_ep *usb_ep_autoconfig_ss(
 	/* First, apply chip-specific "best usage" knowledge.
 	 * This might make a good usb_gadget_ops hook ...
 	 */
-	if (gadget_is_net2280 (gadget) && type == USB_ENDPOINT_XFER_INT) {
+	if (gadget_is_net2280(gadget)) {
+		char name[8];
+
+		if (type == USB_ENDPOINT_XFER_INT) {
 			/* ep-e, ep-f are PIO with only 64 byte fifos */
-		ep = find_ep (gadget, "ep-e");
+			ep = find_ep(gadget, "ep-e");
 			if (ep && ep_matches(gadget, ep, desc, ep_comp))
 				goto found_ep;
-		ep = find_ep (gadget, "ep-f");
+			ep = find_ep(gadget, "ep-f");
 			if (ep && ep_matches(gadget, ep, desc, ep_comp))
 				goto found_ep;
+		}
 
+		/* USB3380: use same address for usb and hardware endpoints */
+		snprintf(name, sizeof(name), "ep%d%s", usb_endpoint_num(desc),
+				usb_endpoint_dir_in(desc) ? "in" : "out");
+		ep = find_ep(gadget, name);
+		if (ep && ep_matches(gadget, ep, desc, ep_comp))
+			goto found_ep;
 	} else if (gadget_is_goku (gadget)) {
 		if (USB_ENDPOINT_XFER_INT == type) {
 			/* single buffering is enough */