hidtypes.h

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/*
 * Copyright (c) 2011 Matej Klonfar
 * 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.
 */

#ifndef LIBUSB_HIDTYPES_H_
#define LIBUSB_HIDTYPES_H_

#include <stdint.h>
#include <adt/list.h>

/*---------------------------------------------------------------------------*/

#define USB_HID_MAX_USAGES      0xffff

#define USB_HID_UINT32_TO_INT32(x, size)        \
        ((((x) & (1 << ((size) - 1))) != 0) ?   \
         -(~((x) - 1) & ((1 << size) - 1)) : (x))

#define USB_HID_INT32_TO_UINT32(x, size)        \
        (((x) < 0 ) ? ((1 << (size)) + (x)) : (x))

/*---------------------------------------------------------------------------*/

typedef enum {
        USB_HID_REPORT_TYPE_INPUT = 1,

        USB_HID_REPORT_TYPE_OUTPUT = 2,

        USB_HID_REPORT_TYPE_FEATURE = 3
} usb_hid_report_type_t;

/*---------------------------------------------------------------------------*/

typedef struct {
        int report_count;

        link_t reports;

        link_t collection_paths;

        int collection_paths_count;

        int use_report_ids;

        uint8_t last_report_id;
        
} usb_hid_report_t;
/*---------------------------------------------------------------------------*/

typedef struct {
        uint8_t report_id;

        usb_hid_report_type_t type;

        size_t bit_length;

        size_t item_length;
        
        link_t report_items;

        link_t link;
} usb_hid_report_description_t;
/*---------------------------------------------------------------------------*/

typedef struct {
        int offset;

        size_t size;

        uint16_t usage_page;

        uint16_t usage;

        uint8_t item_flags;

        usb_hid_report_path_t *collection_path;

        int32_t logical_minimum;

        int32_t logical_maximum;

        int32_t physical_minimum;

        int32_t physical_maximum;

        int32_t usage_minimum;

        int32_t usage_maximum;
        
        uint32_t unit;

        uint32_t unit_exponent;

        uint32_t *usages;

        size_t usages_count;

        int32_t value;

        link_t link;
} usb_hid_report_field_t;

/*---------------------------------------------------------------------------*/

typedef struct {
        int32_t id;
        
        uint16_t extended_usage_page;

        uint32_t usages[USB_HID_MAX_USAGES];
        
        int usages_count;

        uint32_t usage_page;

        int32_t usage_minimum;
        
        int32_t usage_maximum;
        
        int32_t logical_minimum;
        
        int32_t logical_maximum;

        int32_t size;

        int32_t count;

        size_t offset;

        int32_t unit_exponent;
        int32_t unit;

        uint32_t string_index;

        uint32_t string_minimum;

        uint32_t string_maximum;

        uint32_t designator_index;

        uint32_t designator_minimum;

        uint32_t designator_maximum;

        int32_t physical_minimum;

        int32_t physical_maximum;

        uint8_t item_flags;

        usb_hid_report_type_t type;

        usb_hid_report_path_t *usage_path;

        link_t link;

        int in_delimiter;
} usb_hid_report_item_t;
/*---------------------------------------------------------------------------*/
typedef enum {
        USB_HID_MOD_LCTRL = 0x01,
        USB_HID_MOD_LSHIFT = 0x02,
        USB_HID_MOD_LALT = 0x04,
        USB_HID_MOD_LGUI = 0x08,
        USB_HID_MOD_RCTRL = 0x10,
        USB_HID_MOD_RSHIFT = 0x20,
        USB_HID_MOD_RALT = 0x40,
        USB_HID_MOD_RGUI = 0x80,
        USB_HID_MOD_COUNT = 8
} usb_hid_modifiers_t;

static const usb_hid_modifiers_t 
    usb_hid_modifiers_consts[USB_HID_MOD_COUNT] = {
        USB_HID_MOD_LCTRL,
        USB_HID_MOD_LSHIFT,
        USB_HID_MOD_LALT,
        USB_HID_MOD_LGUI,
        USB_HID_MOD_RCTRL,
        USB_HID_MOD_RSHIFT,
        USB_HID_MOD_RALT,
        USB_HID_MOD_RGUI
};
/*---------------------------------------------------------------------------*/


#endif

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