usb_ep_clear_halt — clears endpoint halt, and resets toggle
int usb_ep_clear_halt ( | struct usb_ep * ep); |
Use this when responding to the standard usb “set interface” request, for endpoints that aren't reconfigured, after clearing any other state in the endpoint's i/o queue.
Returns zero, or a negative error code. On success, this call clears the underlying hardware state reflecting endpoint halt and data toggle. Note that some hardware can't support this request (like pxa2xx_udc), and accordingly can't correctly implement interface altsettings.