USB: add reset endpoint operations

Wireless USB endpoint state has a sequence number and a current
window and not just a single toggle bit.  So allow HCDs to provide a
endpoint_reset method and call this or clear the software toggles as
required (after a clear halt, set configuration etc.).

usb_settoggle() and friends are then HCD internal and are moved into
core/hcd.h and all device drivers call usb_reset_endpoint() instead.

If the device endpoint state has been reset (with a clear halt) but
the host endpoint state has not then subsequent data transfers will
not complete. The device will only work again after it is reset or
disconnected.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 8 deletions

diff --git a/include/linux/usb.h b/include/linux/usb.h
index c6b2ab41b908..3aa2cd1f8d08 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1387,6 +1387,7 @@ extern int usb_string(struct usb_device *dev, int index,
 extern int usb_clear_halt(struct usb_device *dev, int pipe);
 extern int usb_reset_configuration(struct usb_device *dev);
 extern int usb_set_interface(struct usb_device *dev, int ifnum, int alternate);
+extern void usb_reset_endpoint(struct usb_device *dev, unsigned int epaddr);
 
 /* this request isn't really synchronous, but it belongs with the others */
 extern int usb_driver_set_configuration(struct usb_device *udev, int config);
@@ -1491,14 +1492,6 @@ void usb_sg_wait(struct usb_sg_request *io);
 #define usb_pipecontrol(pipe)   (usb_pipetype((pipe)) == PIPE_CONTROL)
 #define usb_pipebulk(pipe)      (usb_pipetype((pipe)) == PIPE_BULK)
 
-/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
-#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
-#define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << (ep)))
-#define usb_settoggle(dev, ep, out, bit) \
-                ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
-                 ((bit) << (ep)))
-
-
 static inline unsigned int __create_pipe(struct usb_device *dev,
                 unsigned int endpoint)
 {