[PATCH 6/6] usb: dwc3: gadget: Convert epautoconf workaround to match_ep callback

[Marek Vasut]

Use the .match_ep() callback instead of workaround in core code.
Replace descriptor parsing with ch9 macros with the same effect.
Drop the SPL specific behavior, it is unclear why SPL should even
be special.

Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
---
Cc: Alexander Sverdlin <alexander.sverdlin at siemens.com>
Cc: Felipe Balbi <felipe.balbi at linux.intel.com>
Cc: Lukasz Majewski <lukma at denx.de>
Cc: Mattijs Korpershoek <mkorpershoek at baylibre.com>
Cc: Nishanth Menon <nm at ti.com>
Cc: Simon Glass <sjg at chromium.org>
Cc: Thinh Nguyen <Thinh.Nguyen at synopsys.com>
Cc: Tom Rini <trini at konsulko.com>
Cc: u-boot at lists.denx.de
---
 drivers/usb/dwc3/gadget.c       | 33 +++++++++++++++++++++++
 drivers/usb/gadget/epautoconf.c | 46 +--------------------------------
 2 files changed, 34 insertions(+), 45 deletions(-)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index fab32575647..3ef2f016a60 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1606,6 +1606,38 @@ static int dwc3_gadget_stop(struct usb_gadget *g)
 	return 0;
 }
 
+static struct usb_ep *dwc3_find_ep(struct usb_gadget *gadget, const char *name)
+{
+	struct usb_ep *ep;
+
+	list_for_each_entry(ep, &gadget->ep_list, ep_list)
+		if (!strcmp(ep->name, name))
+			return ep;
+
+	return NULL;
+}
+
+static struct
+usb_ep *dwc3_gadget_match_ep(struct usb_gadget *gadget,
+			     struct usb_endpoint_descriptor *desc,
+			     struct usb_ss_ep_comp_descriptor *comp_desc)
+{
+	/*
+	 * First try standard, common configuration: ep1in-bulk,
+	 * ep2out-bulk, ep3in-int to match other udc drivers to avoid
+	 * confusion in already deployed software (endpoint numbers
+	 * hardcoded in userspace software/drivers)
+	 */
+	if (usb_endpoint_is_bulk_in(desc))
+		return dwc3_find_ep(gadget, "ep1in");
+	if (usb_endpoint_is_bulk_out(desc))
+		return dwc3_find_ep(gadget, "ep2out");
+	if (usb_endpoint_is_int_in(desc))
+		return dwc3_find_ep(gadget, "ep3in");
+
+	return NULL;
+}
+
 static const struct usb_gadget_ops dwc3_gadget_ops = {
 	.get_frame		= dwc3_gadget_get_frame,
 	.wakeup			= dwc3_gadget_wakeup,
@@ -1613,6 +1645,7 @@ static const struct usb_gadget_ops dwc3_gadget_ops = {
 	.pullup			= dwc3_gadget_pullup,
 	.udc_start		= dwc3_gadget_start,
 	.udc_stop		= dwc3_gadget_stop,
+	.match_ep		= dwc3_gadget_match_ep,
 };
 
 /* -------------------------------------------------------------------------- */
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index 66599ce8efa..a4da4f72de9 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -166,18 +166,6 @@ static int ep_matches(
 	return 1;
 }
 
-static struct usb_ep *
-find_ep(struct usb_gadget *gadget, const char *name)
-{
-	struct usb_ep	*ep;
-
-	list_for_each_entry(ep, &gadget->ep_list, ep_list) {
-		if (0 == strcmp(ep->name, name))
-			return ep;
-	}
-	return NULL;
-}
-
 /**
  * usb_ep_autoconfig - choose an endpoint matching the descriptor
  * @gadget: The device to which the endpoint must belong.
@@ -213,39 +201,7 @@ struct usb_ep *usb_ep_autoconfig(
 	struct usb_endpoint_descriptor	*desc
 )
 {
-	struct usb_ep	*ep = NULL;
-	u8		type;
-
-	type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
-
-	/* First, apply chip-specific "best usage" knowledge.
-	 * This might make a good usb_gadget_ops hook ...
-	 */
-	if (!IS_ENABLED(CONFIG_SPL_BUILD) &&
-	    IS_ENABLED(CONFIG_USB_DWC3_GADGET) &&
-	    !strcmp("dwc3-gadget", gadget->name)) {
-		const char *name = NULL;
-		/*
-		 * First try standard, common configuration: ep1in-bulk,
-		 * ep2out-bulk, ep3in-int to match other udc drivers to avoid
-		 * confusion in already deployed software (endpoint numbers
-		 * hardcoded in userspace software/drivers)
-		 */
-		if ((desc->bEndpointAddress & USB_DIR_IN) &&
-		    type == USB_ENDPOINT_XFER_BULK)
-			name = "ep1in";
-		else if ((desc->bEndpointAddress & USB_DIR_IN) == 0 &&
-			 type == USB_ENDPOINT_XFER_BULK)
-			name = "ep2out";
-		else if ((desc->bEndpointAddress & USB_DIR_IN) &&
-			 type == USB_ENDPOINT_XFER_INT)
-			name = "ep3in";
-
-		if (name)
-			ep = find_ep(gadget, name);
-		if (ep && ep_matches(gadget, ep, desc))
-			return ep;
-	}
+	struct usb_ep *ep;
 
 	if (gadget->ops->match_ep) {
 		ep = gadget->ops->match_ep(gadget, desc, NULL);
-- 
2.43.0