source: mainline/uspace/app/vuhid/items.h

/*
 * Copyright (c) 2010 Vojtech Horky
 * 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 usbvirtkbd
 * @{
 */
/** @file
 * @brief HID Item related functions.
 */
#ifndef VUK_ITEM_H_
#define VUK_ITEM_H_

#include <stdint.h>

typedef uint8_t report_descriptor_data_t[];

/* Item types. */
#define ITEM_MAIN 0
#define ITEM_GLOBAL 1
#define ITEM_LOCAL 2

/* Item tags. */

/* Main item tags. */
#define TAG_INPUT 8
#define TAG_OUTPUT 9
#define TAG_FEATURE 11
#define TAG_COLLECTION 10
#define TAG_END_COLLECTION 12

/* Global item tags. */
#define TAG_USAGE_PAGE 0
#define TAG_LOGICAL_MINIMUM 1
#define TAG_LOGICAL_MAXIMUM 2
#define TAG_REPORT_SIZE 7
#define TAG_REPORT_COUNT 9

/* Local item tags. */
#define TAG_USAGE 0
#define TAG_USAGE_MINIMUM 1
#define TAG_USAGE_MAXIMUM 2

/* Bits for Input, Output and Feature items. */
#define _IOF(value, shift) ((value) << (shift))
#define IOF_DATA _IOF(0, 0)
#define IOF_CONSTANT _IOF(1, 0)
#define IOF_ARRAY _IOF(0, 1)
#define IOF_VARIABLE _IOF(1, 1)
#define IOF_ABSOLUTE _IOF(0, 2)
#define IOF_RELATIVE _IOF(1, 2)
/* ... */

/* Collection types. */
#define COLLECTION_PHYSICAL 0x00
#define COLLECTION_APPLICATION 0x01

/** Creates item prefix.
 * @param size Item size.
 * @param type Item type.
 * @param tag Item tag.
 */
#define BUILD_ITEM_PREFIX(size, type, tag) \
        ((size) | ((type) << 2) | ((tag) << 4))

/** Create no-data item.
 * @param type Item type.
 * @param tag Item tag.
 */
#define ITEM_CREATE0(type, tag) \
        BUILD_ITEM_PREFIX(0, type, tag)

/** Create item with 1-byte data.
 * @param type Item type.
 * @param tag Item tag.
 * @param data Item data (single byte).
 */
#define ITEM_CREATE1(type, tag, data) \
        BUILD_ITEM_PREFIX(1, type, tag), data

#endif
/**
 * @}
 */