| 1 | /*
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| 2 | * Copyright (c) 2011 Vojtech Horky
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| 3 | * Copyright (c) 2013 Jan Vesely
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * - Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * - Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * - The name of the author may not be used to endorse or promote products
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| 16 | * derived from this software without specific prior written permission.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | */
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| 29 |
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| 30 | /** @addtogroup libusbdev
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| 31 | * @{
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| 32 | */
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| 33 | /** @file
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| 34 | * USB device driver framework.
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| 35 | */
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| 36 |
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| 37 | #ifndef LIBUSBDEV_ALTERNATE_IFACES_H_
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| 38 | #define LIBUSBDEV_ALTERNATE_IFACES_H_
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| 39 |
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| 40 | #include <errno.h>
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| 41 | #include <usb/descriptor.h>
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| 42 | #include <stddef.h>
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| 43 | #include <stdint.h>
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| 44 |
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| 45 | /** Wrapper for data related to alternate interface setting.
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| 46 | * The pointers will typically point inside configuration descriptor and
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| 47 | * thus you shall not deallocate them.
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| 48 | */
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| 49 | typedef struct {
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| 50 | /** Interface descriptor. */
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| 51 | const usb_standard_interface_descriptor_t *interface;
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| 52 | /** Pointer to start of descriptor tree bound with this interface. */
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| 53 | const uint8_t *nested_descriptors;
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| 54 | /** Size of data pointed by nested_descriptors in bytes. */
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| 55 | size_t nested_descriptors_size;
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| 56 | } usb_alternate_interface_descriptors_t;
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| 57 |
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| 58 | /** Alternate interface settings. */
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| 59 | typedef struct {
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| 60 | /** Array of alternate interfaces descriptions. */
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| 61 | usb_alternate_interface_descriptors_t *alternatives;
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| 62 | /** Size of @c alternatives array. */
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| 63 | size_t alternative_count;
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| 64 | /** Index of currently selected one. */
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| 65 | size_t current;
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| 66 | } usb_alternate_interfaces_t;
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| 67 |
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| 68 | size_t usb_interface_count_alternates(const uint8_t *, size_t, uint8_t);
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| 69 | errno_t usb_alternate_interfaces_init(usb_alternate_interfaces_t *,
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| 70 | const uint8_t *, size_t, int);
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| 71 | void usb_alternate_interfaces_deinit(usb_alternate_interfaces_t *);
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| 72 |
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| 73 | #endif
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| 74 | /**
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| 75 | * @}
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| 76 | */
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