linux-imx

/* ir-mce_kbd-decoder.c - A decoder for the RC6-ish keyboard/mouse IR protocol

 * used by the Microsoft Remote Keyboard for Windows Media Center Edition,

 * referred to by Microsoft's Windows Media Center remote specification docs

 * as "an internal protocol called MCIR-2".

 *

 * Copyright (C) 2011 by Jarod Wilson <jarod@redhat.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation version 2 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#include <linux/module.h>

​

#include "rc-core-priv.h"

​

/*

 * This decoder currently supports:

 * - MCIR-2 29-bit IR signals used for mouse movement and buttons

 * - MCIR-2 32-bit IR signals used for standard keyboard keys

 *

 * The media keys on the keyboard send RC-6 signals that are indistinguishable

 * from the keys of the same name on the stock MCE remote, and will be handled

 * by the standard RC-6 decoder, and be made available to the system via the

 * input device for the remote, rather than the keyboard/mouse one.

 */

​

#define MCIR2_UNIT      333333  /* ns */

#define MCIR2_HEADER_NBITS  5

#define MCIR2_MOUSE_NBITS   29

#define MCIR2_KEYBOARD_NBITS    32

#define MCIR2_PREFIX_PULSE  (8 * MCIR2_UNIT)

#define MCIR2_PREFIX_SPACE  (1 * MCIR2_UNIT)

#define MCIR2_MAX_LEN       (3 * MCIR2_UNIT)

#define MCIR2_BIT_START     (1 * MCIR2_UNIT)

#define MCIR2_BIT_END       (1 * MCIR2_UNIT)

#define MCIR2_BIT_0     (1 * MCIR2_UNIT)

#define MCIR2_BIT_SET       (2 * MCIR2_UNIT)

#define MCIR2_MODE_MASK     0xf /* for the header bits */

#define MCIR2_KEYBOARD_HEADER   0x4

#define MCIR2_MOUSE_HEADER  0x1

#define MCIR2_MASK_KEYS_START   0xe0

​

enum mce_kbd_mode {

    MCIR2_MODE_KEYBOARD,

    MCIR2_MODE_MOUSE,

    MCIR2_MODE_UNKNOWN,

};

​

enum mce_kbd_state {

    STATE_INACTIVE,

    STATE_HEADER_BIT_START,

    STATE_HEADER_BIT_END,

    STATE_BODY_BIT_START,

    STATE_BODY_BIT_END,

    STATE_FINISHED,

};

​

static unsigned char kbd_keycodes[256] = {

    KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_A,

    KEY_B,      KEY_C,      KEY_D,      KEY_E,      KEY_F,

    KEY_G,      KEY_H,      KEY_I,      KEY_J,      KEY_K,

    KEY_L,      KEY_M,      KEY_N,      KEY_O,      KEY_P,

    KEY_Q,      KEY_R,      KEY_S,      KEY_T,      KEY_U,

    KEY_V,      KEY_W,      KEY_X,      KEY_Y,      KEY_Z,

    KEY_1,      KEY_2,      KEY_3,      KEY_4,      KEY_5,

    KEY_6,      KEY_7,      KEY_8,      KEY_9,      KEY_0,

    KEY_ENTER,  KEY_ESC,    KEY_BACKSPACE,  KEY_TAB,    KEY_SPACE,

    KEY_MINUS,  KEY_EQUAL,  KEY_LEFTBRACE,  KEY_RIGHTBRACE, KEY_BACKSLASH,

    KEY_BACKSLASH,  KEY_SEMICOLON,  KEY_APOSTROPHE, KEY_GRAVE,  KEY_COMMA,

    KEY_DOT,    KEY_SLASH,  KEY_CAPSLOCK,   KEY_F1,     KEY_F2,

    KEY_F3,     KEY_F4,     KEY_F5,     KEY_F6,     KEY_F7,

    KEY_F8,     KEY_F9,     KEY_F10,    KEY_F11,    KEY_F12,

    KEY_SYSRQ,  KEY_SCROLLLOCK, KEY_PAUSE,  KEY_INSERT, KEY_HOME,

    KEY_PAGEUP, KEY_DELETE, KEY_END,    KEY_PAGEDOWN,   KEY_RIGHT,

    KEY_LEFT,   KEY_DOWN,   KEY_UP,     KEY_NUMLOCK,    KEY_KPSLASH,

    KEY_KPASTERISK, KEY_KPMINUS,    KEY_KPPLUS, KEY_KPENTER,    KEY_KP1,

    KEY_KP2,    KEY_KP3,    KEY_KP4,    KEY_KP5,    KEY_KP6,

    KEY_KP7,    KEY_KP8,    KEY_KP9,    KEY_KP0,    KEY_KPDOT,

    KEY_102ND,  KEY_COMPOSE,    KEY_POWER,  KEY_KPEQUAL,    KEY_F13,

    KEY_F14,    KEY_F15,    KEY_F16,    KEY_F17,    KEY_F18,

    KEY_F19,    KEY_F20,    KEY_F21,    KEY_F22,    KEY_F23,

    KEY_F24,    KEY_OPEN,   KEY_HELP,   KEY_PROPS,  KEY_FRONT,

    KEY_STOP,   KEY_AGAIN,  KEY_UNDO,   KEY_CUT,    KEY_COPY,

    KEY_PASTE,  KEY_FIND,   KEY_MUTE,   KEY_VOLUMEUP,   KEY_VOLUMEDOWN,

    KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_KPCOMMA,    KEY_RESERVED,

    KEY_RO,     KEY_KATAKANAHIRAGANA, KEY_YEN,  KEY_HENKAN, KEY_MUHENKAN,

    KEY_KPJPCOMMA,  KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_HANGUEL,