[usb] Add clear_tt() hub method to clear transaction translator buffer

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 22 insertions, 2 deletions

diff --git a/src/drivers/usb/ehci.c b/src/drivers/usb/ehci.c
index 4436c982..83635f45 100644
--- a/src/drivers/usb/ehci.c
+++ b/src/drivers/usb/ehci.c
@@ -1022,7 +1022,7 @@ static void ehci_endpoint_close ( struct usb_endpoint *ep ) {
 		/* No way to prevent hardware from continuing to
 		 * access the memory, so leak it.
 		 */
-		DBGC ( ehci, "EHCI %p %s endpoint %d could not unschedule: "
+		DBGC ( ehci, "EHCI %p %s endpoint %02x could not unschedule: "
 		       "%s\n", ehci, usb->name, ep->address, strerror ( rc ) );
 		return;
 	}
@@ -1217,7 +1217,7 @@ static void ehci_endpoint_poll ( struct ehci_endpoint *endpoint ) {
 		 */
 		if ( status & EHCI_STATUS_HALTED ) {
 			rc = -EIO_STATUS ( status );
-			DBGC ( ehci, "EHCI %p %s endpoint %d completion %d "
+			DBGC ( ehci, "EHCI %p %s endpoint %02x completion %d "
 			       "failed (status %02x): %s\n", ehci, usb->name,
 			       ep->address, index, status, strerror ( rc ) );
 			while ( ! iobuf )
@@ -1497,6 +1497,25 @@ static int ehci_hub_speed ( struct usb_hub *hub, struct usb_port *port ) {
 }
 
 /**
+ * Clear transaction translator buffer
+ *
+ * @v hub		USB hub
+ * @v port		USB port
+ * @v ep		USB endpoint
+ * @ret rc		Return status code
+ */
+static int ehci_hub_clear_tt ( struct usb_hub *hub, struct usb_port *port,
+			       struct usb_endpoint *ep ) {
+	struct ehci_device *ehci = usb_hub_get_drvdata ( hub );
+
+	/* Should never be called; this is a root hub */
+	DBGC ( ehci, "EHCI %p port %d nonsensical CLEAR_TT for %s endpoint "
+	       "%02x\n", ehci, port->address, ep->usb->name, ep->address );
+
+	return -ENOTSUP;
+}
+
+/**
  * Poll for port status changes
  *
  * @v hub		USB hub
@@ -1706,6 +1725,7 @@ static struct usb_host_operations ehci_operations = {
 		.enable = ehci_hub_enable,
 		.disable = ehci_hub_disable,
 		.speed = ehci_hub_speed,
+		.clear_tt = ehci_hub_clear_tt,
 	},
 };