/*
* Copyright (c) 2011 Vojtech Horky
* Copyright (c) 2013 Jan Vesely
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup libusbdev
* @{
*/
/** @file
* USB device driver framework.
*/
#ifndef LIBUSBDEV_ALTERNATE_IFACES_H_
#define LIBUSBDEV_ALTERNATE_IFACES_H_
#include <errno.h>
#include <usb/descriptor.h>
#include <stddef.h>
#include <stdint.h>
/** Wrapper for data related to alternate interface setting.
* The pointers will typically point inside configuration descriptor and
* thus you shall not deallocate them.
*/
typedef struct {
/** Interface descriptor. */
const usb_standard_interface_descriptor_t *interface;
/** Pointer to start of descriptor tree bound with this interface. */
const uint8_t *nested_descriptors;
/** Size of data pointed by nested_descriptors in bytes. */
size_t nested_descriptors_size;
} usb_alternate_interface_descriptors_t;
/** Alternate interface settings. */
typedef struct {
/** Array of alternate interfaces descriptions. */
usb_alternate_interface_descriptors_t *alternatives;
/** Size of @c alternatives array. */
size_t alternative_count;
/** Index of currently selected one. */
size_t current;
} usb_alternate_interfaces_t;
size_t usb_interface_count_alternates(const uint8_t *, size_t, uint8_t);
errno_t usb_alternate_interfaces_init(usb_alternate_interfaces_t *,
const uint8_t *, size_t, int);
void usb_alternate_interfaces_deinit(usb_alternate_interfaces_t *);
#endif
/**
* @}
*/