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USB GADGET/PERIPHERAL: g_file_storage Bulk-Only Transport compliance

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Gadget can tell controller driver to ignore Clear-Feature(HALT_ENDPOINT)
This API change enables future support for Bulk-Only Transport compliance

Signed-off-by: David Lopo <lopo.david@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Lopo 2008-04-29 10:12:37 +01:00 committed by Greg Kroah-Hartman
parent c4d0f8cbca
commit a5e54b0dbb
1 changed files with 21 additions and 0 deletions
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21
include/linux/usb/gadget.h
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@ -114,6 +114,8 @@ struct usb_ep_ops {
int (*dequeue) (struct usb_ep *ep, struct usb_request *req);
int (*set_halt) (struct usb_ep *ep, int value);
int (*set_wedge) (struct usb_ep *ep);
int (*fifo_status) (struct usb_ep *ep);
void (*fifo_flush) (struct usb_ep *ep);
};
@ -348,6 +350,25 @@ static inline int usb_ep_clear_halt(struct usb_ep *ep)
return ep->ops->set_halt(ep, 0);
}
/**
* usb_ep_set_wedge - sets the halt feature and ignores clear requests
* @ep: the endpoint being wedged
*
* Use this to stall an endpoint and ignore CLEAR_FEATURE(HALT_ENDPOINT)
* requests. If the gadget driver clears the halt status, it will
* automatically unwedge the endpoint.
*
* Returns zero on success, else negative errno.
*/
static inline int
usb_ep_set_wedge(struct usb_ep *ep)
{
if (ep->ops->set_wedge)
return ep->ops->set_wedge(ep);
else
return ep->ops->set_halt(ep, 1);
}
/**
* usb_ep_fifo_status - returns number of bytes in fifo, or error
* @ep: the endpoint whose fifo status is being checked.