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USB: Add usb_endpoint_xfer_control to usb.h

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Added a function to check if an endpoint is a control endpoint.
There were similar functions for bulk, interrupt, and isoc,
but not for control endpoints.

Signed-off-by: Sarah Bailey <saharabeara@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sarah Bailey 2006-12-23 23:14:58 -08:00 • committed by Greg Kroah-Hartman
parent 7ca46b862f
commit a8ef36bc0a
1 changed files with 12 additions and 0 deletions
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12
include/linux/usb.h
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@ -556,6 +556,18 @@ static inline int usb_endpoint_xfer_bulk(const struct usb_endpoint_descriptor *e
USB_ENDPOINT_XFER_BULK); USB_ENDPOINT_XFER_BULK);
} }
/**
* usb_endpoint_xfer_control - check if the endpoint has control transfer type
* @epd: endpoint to be checked
*
* Returns true if the endpoint is of type control, otherwise it returns false.
*/
static inline int usb_endpoint_xfer_control(const struct usb_endpoint_descriptor *epd)
{
return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
USB_ENDPOINT_XFER_CONTROL);
}
/** /**
* usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type * usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type
* @epd: endpoint to be checked * @epd: endpoint to be checked