Add the new function usbd_clear_endpoint_feature() which allows to issue

an UR_CLEAR_FEATURE request on a specific endpoint address without the
need to have a pipe open to that endpoint.

From NetBSD, ok mpi@

1 files changed, 14 insertions, 1 deletions

diff --git a/sys/dev/usb/usbdi_util.c b/sys/dev/usb/usbdi_util.c
index 5c067c1f4a1..4b2cdc5f8b6 100644
--- a/sys/dev/usb/usbdi_util.c
+++ b/sys/dev/usb/usbdi_util.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: usbdi_util.c,v 1.44 2019/10/06 17:11:51 mpi Exp $ */
+/*	$OpenBSD: usbdi_util.c,v 1.45 2021/01/25 14:05:57 mglocker Exp $ */
 /*	$NetBSD: usbdi_util.c,v 1.40 2002/07/11 21:14:36 augustss Exp $	*/
 /*	$FreeBSD: src/sys/dev/usb/usbdi_util.c,v 1.14 1999/11/17 22:33:50 n_hibma Exp $	*/
 
@@ -192,6 +192,19 @@ usbd_clear_port_feature(struct usbd_device *dev, int port, int sel)
 }
 
 usbd_status
+usbd_clear_endpoint_feature(struct usbd_device *dev, int epaddr, int sel)
+{
+	usb_device_request_t req;
+
+	req.bmRequestType = UT_WRITE_ENDPOINT;
+	req.bRequest = UR_CLEAR_FEATURE;
+	USETW(req.wValue, sel);
+	USETW(req.wIndex, epaddr);
+	USETW(req.wLength, 0);
+	return (usbd_do_request(dev, &req, 0));
+}
+
+usbd_status
 usbd_set_port_feature(struct usbd_device *dev, int port, int sel)
 {
 	usb_device_request_t req;