LXR linux/drivers/media/rc/ir-mce

   1/* ir-mce_kbd-decoder.c - A decoder for the RC6-ish keyboard/mouse IR protocol
   2 * used by the Microsoft Remote Keyboard for Windows Media Center Edition,
   3 * referred to by Microsoft's Windows Media Center remote specification docs
   4 * as "an internal protocol called MCIR-2".
   5 *
   6 * Copyright (C) 2011 by Jarod Wilson <jarod@redhat.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation version 2 of the License.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 */
  17#include <linux/module.h>
  18
  19#include "rc-core-priv.h"
  20
  21/*
  22 * This decoder currently supports:
  23 * - MCIR-2 29-bit IR signals used for mouse movement and buttons
  24 * - MCIR-2 32-bit IR signals used for standard keyboard keys
  25 *
  26 * The media keys on the keyboard send RC-6 signals that are indistinguishable
  27 * from the keys of the same name on the stock MCE remote, and will be handled
  28 * by the standard RC-6 decoder, and be made available to the system via the
  29 * input device for the remote, rather than the keyboard/mouse one.
  30 */
  31
  32#define MCIR2_UNIT              333333  /* ns */
  33#define MCIR2_HEADER_NBITS      5
  34#define MCIR2_MOUSE_NBITS       29
  35#define MCIR2_KEYBOARD_NBITS    32
  36#define MCIR2_PREFIX_PULSE      (8 * MCIR2_UNIT)
  37#define MCIR2_PREFIX_SPACE      (1 * MCIR2_UNIT)
  38#define MCIR2_MAX_LEN           (3 * MCIR2_UNIT)
  39#define MCIR2_BIT_START         (1 * MCIR2_UNIT)
  40#define MCIR2_BIT_END           (1 * MCIR2_UNIT)
  41#define MCIR2_BIT_0             (1 * MCIR2_UNIT)
  42#define MCIR2_BIT_SET           (2 * MCIR2_UNIT)
  43#define MCIR2_MODE_MASK         0xf     /* for the header bits */
  44#define MCIR2_KEYBOARD_HEADER   0x4
  45#define MCIR2_MOUSE_HEADER      0x1
  46#define MCIR2_MASK_KEYS_START   0xe0
  47
  48enum mce_kbd_mode {
  49        MCIR2_MODE_KEYBOARD,
  50        MCIR2_MODE_MOUSE,
  51        MCIR2_MODE_UNKNOWN,
  52};
  53
  54enum mce_kbd_state {
  55        STATE_INACTIVE,
  56        STATE_HEADER_BIT_START,
  57        STATE_HEADER_BIT_END,
  58        STATE_BODY_BIT_START,
  59        STATE_BODY_BIT_END,
  60        STATE_FINISHED,
  61};
  62
  63static unsigned char kbd_keycodes[256] = {
  64        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_A,
  65        KEY_B,          KEY_C,          KEY_D,          KEY_E,          KEY_F,
  66        KEY_G,          KEY_H,          KEY_I,          KEY_J,          KEY_K,
  67        KEY_L,          KEY_M,          KEY_N,          KEY_O,          KEY_P,
  68        KEY_Q,          KEY_R,          KEY_S,          KEY_T,          KEY_U,
  69        KEY_V,          KEY_W,          KEY_X,          KEY_Y,          KEY_Z,
  70        KEY_1,          KEY_2,          KEY_3,          KEY_4,          KEY_5,
  71        KEY_6,          KEY_7,          KEY_8,          KEY_9,          KEY_0,
  72        KEY_ENTER,      KEY_ESC,        KEY_BACKSPACE,  KEY_TAB,        KEY_SPACE,
  73        KEY_MINUS,      KEY_EQUAL,      KEY_LEFTBRACE,  KEY_RIGHTBRACE, KEY_BACKSLASH,
  74        KEY_BACKSLASH,  KEY_SEMICOLON,  KEY_APOSTROPHE, KEY_GRAVE,      KEY_COMMA,
  75        KEY_DOT,        KEY_SLASH,      KEY_CAPSLOCK,   KEY_F1,         KEY_F2,
  76        KEY_F3,         KEY_F4,         KEY_F5,         KEY_F6,         KEY_F7,
  77        KEY_F8,         KEY_F9,         KEY_F10,        KEY_F11,        KEY_F12,
  78        KEY_SYSRQ,      KEY_SCROLLLOCK, KEY_PAUSE,      KEY_INSERT,     KEY_HOME,
  79        KEY_PAGEUP,     KEY_DELETE,     KEY_END,        KEY_PAGEDOWN,   KEY_RIGHT,
  80        KEY_LEFT,       KEY_DOWN,       KEY_UP,         KEY_NUMLOCK,    KEY_KPSLASH,
  81        KEY_KPASTERISK, KEY_KPMINUS,    KEY_KPPLUS,     KEY_KPENTER,    KEY_KP1,
  82        KEY_KP2,        KEY_KP3,        KEY_KP4,        KEY_KP5,        KEY_KP6,
  83        KEY_KP7,        KEY_KP8,        KEY_KP9,        KEY_KP0,        KEY_KPDOT,
  84        KEY_102ND,      KEY_COMPOSE,    KEY_POWER,      KEY_KPEQUAL,    KEY_F13,
  85        KEY_F14,        KEY_F15,        KEY_F16,        KEY_F17,        KEY_F18,
  86        KEY_F19,        KEY_F20,        KEY_F21,        KEY_F22,        KEY_F23,
  87        KEY_F24,        KEY_OPEN,       KEY_HELP,       KEY_PROPS,      KEY_FRONT,
  88        KEY_STOP,       KEY_AGAIN,      KEY_UNDO,       KEY_CUT,        KEY_COPY,
  89        KEY_PASTE,      KEY_FIND,       KEY_MUTE,       KEY_VOLUMEUP,   KEY_VOLUMEDOWN,
  90        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_KPCOMMA,    KEY_RESERVED,
  91        KEY_RO,         KEY_KATAKANAHIRAGANA, KEY_YEN,  KEY_HENKAN,     KEY_MUHENKAN,
  92        KEY_KPJPCOMMA,  KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_HANGUEL,
  93        KEY_HANJA,      KEY_KATAKANA,   KEY_HIRAGANA,   KEY_ZENKAKUHANKAKU, KEY_RESERVED,
  94        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
  95        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
  96        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
  97        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
  98        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
  99        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
 100        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
 101        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
 102        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
 103        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
 104        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
 105        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
 106        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
 107        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
 108        KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,   KEY_LEFTCTRL,
 109        KEY_LEFTSHIFT,  KEY_LEFTALT,    KEY_LEFTMETA,   KEY_RIGHTCTRL,  KEY_RIGHTSHIFT,
 110        KEY_RIGHTALT,   KEY_RIGHTMETA,  KEY_PLAYPAUSE,  KEY_STOPCD,     KEY_PREVIOUSSONG,
 111        KEY_NEXTSONG,   KEY_EJECTCD,    KEY_VOLUMEUP,   KEY_VOLUMEDOWN, KEY_MUTE,
 112        KEY_WWW,        KEY_BACK,       KEY_FORWARD,    KEY_STOP,       KEY_FIND,
 113        KEY_SCROLLUP,   KEY_SCROLLDOWN, KEY_EDIT,       KEY_SLEEP,      KEY_COFFEE,
 114        KEY_REFRESH,    KEY_CALC,       KEY_RESERVED,   KEY_RESERVED,   KEY_RESERVED,
 115        KEY_RESERVED
 116};
 117
 118static void mce_kbd_rx_timeout(struct timer_list *t)
 119{
 120        struct ir_raw_event_ctrl *raw = from_timer(raw, t, mce_kbd.rx_timeout);
 121        unsigned char maskcode;
 122        unsigned long flags;
 123        int i;
 124
 125        dev_dbg(&raw->dev->dev, "timer callback clearing all keys\n");
 126
 127        spin_lock_irqsave(&raw->mce_kbd.keylock, flags);
 128
 129        if (time_is_before_eq_jiffies(raw->mce_kbd.rx_timeout.expires)) {
 130                for (i = 0; i < 7; i++) {
 131                        maskcode = kbd_keycodes[MCIR2_MASK_KEYS_START + i];
 132                        input_report_key(raw->mce_kbd.idev, maskcode, 0);
 133                }
 134
 135                for (i = 0; i < MCIR2_MASK_KEYS_START; i++)
 136                        input_report_key(raw->mce_kbd.idev, kbd_keycodes[i], 0);
 137
 138                input_sync(raw->mce_kbd.idev);
 139        }
 140        spin_unlock_irqrestore(&raw->mce_kbd.keylock, flags);
 141}
 142
 143static enum mce_kbd_mode mce_kbd_mode(struct mce_kbd_dec *data)
 144{
 145        switch (data->header & MCIR2_MODE_MASK) {
 146        case MCIR2_KEYBOARD_HEADER:
 147                return MCIR2_MODE_KEYBOARD;
 148        case MCIR2_MOUSE_HEADER:
 149                return MCIR2_MODE_MOUSE;
 150        default:
 151                return MCIR2_MODE_UNKNOWN;
 152        }
 153}
 154
 155static void ir_mce_kbd_process_keyboard_data(struct rc_dev *dev, u32 scancode)
 156{
 157        struct mce_kbd_dec *data = &dev->raw->mce_kbd;
 158        u8 keydata1  = (scancode >> 8) & 0xff;
 159        u8 keydata2  = (scancode >> 16) & 0xff;
 160        u8 shiftmask = scancode & 0xff;
 161        unsigned char maskcode;
 162        int i, keystate;
 163
 164        dev_dbg(&dev->dev, "keyboard: keydata2 = 0x%02x, keydata1 = 0x%02x, shiftmask = 0x%02x\n",
 165                keydata2, keydata1, shiftmask);
 166
 167        for (i = 0; i < 7; i++) {
 168                maskcode = kbd_keycodes[MCIR2_MASK_KEYS_START + i];
 169                if (shiftmask & (1 << i))
 170                        keystate = 1;
 171                else
 172                        keystate = 0;
 173                input_report_key(data->idev, maskcode, keystate);
 174        }
 175
 176        if (keydata1)
 177                input_report_key(data->idev, kbd_keycodes[keydata1], 1);
 178        if (keydata2)
 179                input_report_key(data->idev, kbd_keycodes[keydata2], 1);
 180
 181        if (!keydata1 && !keydata2) {
 182                for (i = 0; i < MCIR2_MASK_KEYS_START; i++)
 183                        input_report_key(data->idev, kbd_keycodes[i], 0);
 184        }
 185}
 186
 187static void ir_mce_kbd_process_mouse_data(struct rc_dev *dev, u32 scancode)
 188{
 189        struct mce_kbd_dec *data = &dev->raw->mce_kbd;
 190        /* raw mouse coordinates */
 191        u8 xdata = (scancode >> 7) & 0x7f;
 192        u8 ydata = (scancode >> 14) & 0x7f;
 193        int x, y;
 194        /* mouse buttons */
 195        bool right = scancode & 0x40;
 196        bool left  = scancode & 0x20;
 197
 198        if (xdata & 0x40)
 199                x = -((~xdata & 0x7f) + 1);
 200        else
 201                x = xdata;
 202
 203        if (ydata & 0x40)
 204                y = -((~ydata & 0x7f) + 1);
 205        else
 206                y = ydata;
 207
 208        dev_dbg(&dev->dev, "mouse: x = %d, y = %d, btns = %s%s\n",
 209                x, y, left ? "L" : "", right ? "R" : "");
 210
 211        input_report_rel(data->idev, REL_X, x);
 212        input_report_rel(data->idev, REL_Y, y);
 213
 214        input_report_key(data->idev, BTN_LEFT, left);
 215        input_report_key(data->idev, BTN_RIGHT, right);
 216}
 217
 218/**
 219 * ir_mce_kbd_decode() - Decode one mce_kbd pulse or space
 220 * @dev:        the struct rc_dev descriptor of the device
 221 * @ev:         the struct ir_raw_event descriptor of the pulse/space
 222 *
 223 * This function returns -EINVAL if the pulse violates the state machine
 224 */
 225static int ir_mce_kbd_decode(struct rc_dev *dev, struct ir_raw_event ev)
 226{
 227        struct mce_kbd_dec *data = &dev->raw->mce_kbd;
 228        u32 scancode;
 229        unsigned long delay;
 230        struct lirc_scancode lsc = {};
 231
 232        if (!is_timing_event(ev)) {
 233                if (ev.reset)
 234                        data->state = STATE_INACTIVE;
 235                return 0;
 236        }
 237
 238        if (!geq_margin(ev.duration, MCIR2_UNIT, MCIR2_UNIT / 2))
 239                goto out;
 240
 241again:
 242        dev_dbg(&dev->dev, "started at state %i (%uus %s)\n",
 243                data->state, TO_US(ev.duration), TO_STR(ev.pulse));
 244
 245        if (!geq_margin(ev.duration, MCIR2_UNIT, MCIR2_UNIT / 2))
 246                return 0;
 247
 248        switch (data->state) {
 249
 250        case STATE_INACTIVE:
 251                if (!ev.pulse)
 252                        break;
 253
 254                /* Note: larger margin on first pulse since each MCIR2_UNIT
 255                   is quite short and some hardware takes some time to
 256                   adjust to the signal */
 257                if (!eq_margin(ev.duration, MCIR2_PREFIX_PULSE, MCIR2_UNIT))
 258                        break;
 259
 260                data->state = STATE_HEADER_BIT_START;
 261                data->count = 0;
 262                data->header = 0;
 263                return 0;
 264
 265        case STATE_HEADER_BIT_START:
 266                if (geq_margin(ev.duration, MCIR2_MAX_LEN, MCIR2_UNIT / 2))
 267                        break;
 268
 269                data->header <<= 1;
 270                if (ev.pulse)
 271                        data->header |= 1;
 272                data->count++;
 273                data->state = STATE_HEADER_BIT_END;
 274                return 0;
 275
 276        case STATE_HEADER_BIT_END:
 277                decrease_duration(&ev, MCIR2_BIT_END);
 278
 279                if (data->count != MCIR2_HEADER_NBITS) {
 280                        data->state = STATE_HEADER_BIT_START;
 281                        goto again;
 282                }
 283
 284                switch (mce_kbd_mode(data)) {
 285                case MCIR2_MODE_KEYBOARD:
 286                        data->wanted_bits = MCIR2_KEYBOARD_NBITS;
 287                        break;
 288                case MCIR2_MODE_MOUSE:
 289                        data->wanted_bits = MCIR2_MOUSE_NBITS;
 290                        break;
 291                default:
 292                        dev_dbg(&dev->dev, "not keyboard or mouse data\n");
 293                        goto out;
 294                }
 295
 296                data->count = 0;
 297                data->body = 0;
 298                data->state = STATE_BODY_BIT_START;
 299                goto again;
 300
 301        case STATE_BODY_BIT_START:
 302                if (geq_margin(ev.duration, MCIR2_MAX_LEN, MCIR2_UNIT / 2))
 303                        break;
 304
 305                data->body <<= 1;
 306                if (ev.pulse)
 307                        data->body |= 1;
 308                data->count++;
 309                data->state = STATE_BODY_BIT_END;
 310                return 0;
 311
 312        case STATE_BODY_BIT_END:
 313                if (data->count == data->wanted_bits)
 314                        data->state = STATE_FINISHED;
 315                else
 316                        data->state = STATE_BODY_BIT_START;
 317
 318                decrease_duration(&ev, MCIR2_BIT_END);
 319                goto again;
 320
 321        case STATE_FINISHED:
 322                if (ev.pulse)
 323                        break;
 324
 325                switch (data->wanted_bits) {
 326                case MCIR2_KEYBOARD_NBITS:
 327                        scancode = data->body & 0xffffff;
 328                        dev_dbg(&dev->dev, "keyboard data 0x%08x\n",
 329                                data->body);
 330                        spin_lock(&data->keylock);
 331                        if (scancode) {
 332                                delay = nsecs_to_jiffies(dev->timeout) +
 333                                        msecs_to_jiffies(100);
 334                                mod_timer(&data->rx_timeout, jiffies + delay);
 335                        } else {
 336                                del_timer(&data->rx_timeout);
 337                        }
 338                        /* Pass data to keyboard buffer parser */
 339                        ir_mce_kbd_process_keyboard_data(dev, scancode);
 340                        spin_unlock(&data->keylock);
 341                        lsc.rc_proto = RC_PROTO_MCIR2_KBD;
 342                        break;
 343                case MCIR2_MOUSE_NBITS:
 344                        scancode = data->body & 0x1fffff;
 345                        dev_dbg(&dev->dev, "mouse data 0x%06x\n", scancode);
 346                        /* Pass data to mouse buffer parser */
 347                        ir_mce_kbd_process_mouse_data(dev, scancode);
 348                        lsc.rc_proto = RC_PROTO_MCIR2_MSE;
 349                        break;
 350                default:
 351                        dev_dbg(&dev->dev, "not keyboard or mouse data\n");
 352                        goto out;
 353                }
 354
 355                lsc.scancode = scancode;
 356                ir_lirc_scancode_event(dev, &lsc);
 357                data->state = STATE_INACTIVE;
 358                input_event(data->idev, EV_MSC, MSC_SCAN, scancode);
 359                input_sync(data->idev);
 360                return 0;
 361        }
 362
 363out:
 364        dev_dbg(&dev->dev, "failed at state %i (%uus %s)\n",
 365                data->state, TO_US(ev.duration), TO_STR(ev.pulse));
 366        data->state = STATE_INACTIVE;
 367        return -EINVAL;
 368}
 369
 370static int ir_mce_kbd_register(struct rc_dev *dev)
 371{
 372        struct mce_kbd_dec *mce_kbd = &dev->raw->mce_kbd;
 373        struct input_dev *idev;
 374        int i, ret;
 375
 376        idev = input_allocate_device();
 377        if (!idev)
 378                return -ENOMEM;
 379
 380        snprintf(mce_kbd->name, sizeof(mce_kbd->name),
 381                 "MCE IR Keyboard/Mouse (%s)", dev->driver_name);
 382        strlcat(mce_kbd->phys, "/input0", sizeof(mce_kbd->phys));
 383
 384        idev->name = mce_kbd->name;
 385        idev->phys = mce_kbd->phys;
 386
 387        /* Keyboard bits */
 388        set_bit(EV_KEY, idev->evbit);
 389        set_bit(EV_REP, idev->evbit);
 390        for (i = 0; i < sizeof(kbd_keycodes); i++)
 391                set_bit(kbd_keycodes[i], idev->keybit);
 392
 393        /* Mouse bits */
 394        set_bit(EV_REL, idev->evbit);
 395        set_bit(REL_X, idev->relbit);
 396        set_bit(REL_Y, idev->relbit);
 397        set_bit(BTN_LEFT, idev->keybit);
 398        set_bit(BTN_RIGHT, idev->keybit);
 399
 400        /* Report scancodes too */
 401        set_bit(EV_MSC, idev->evbit);
 402        set_bit(MSC_SCAN, idev->mscbit);
 403
 404        timer_setup(&mce_kbd->rx_timeout, mce_kbd_rx_timeout, 0);
 405        spin_lock_init(&mce_kbd->keylock);
 406
 407        input_set_drvdata(idev, mce_kbd);
 408
 409#if 0
 410        /* Adding this reference means two input devices are associated with
 411         * this rc-core device, which ir-keytable doesn't cope with yet */
 412        idev->dev.parent = &dev->dev;
 413#endif
 414
 415        ret = input_register_device(idev);
 416        if (ret < 0) {
 417                input_free_device(idev);
 418                return -EIO;
 419        }
 420
 421        mce_kbd->idev = idev;
 422
 423        return 0;
 424}
 425
 426static int ir_mce_kbd_unregister(struct rc_dev *dev)
 427{
 428        struct mce_kbd_dec *mce_kbd = &dev->raw->mce_kbd;
 429        struct input_dev *idev = mce_kbd->idev;
 430
 431        del_timer_sync(&mce_kbd->rx_timeout);
 432        input_unregister_device(idev);
 433
 434        return 0;
 435}
 436
 437static const struct ir_raw_timings_manchester ir_mce_kbd_timings = {
 438        .leader_pulse   = MCIR2_PREFIX_PULSE,
 439        .invert         = 1,
 440        .clock          = MCIR2_UNIT,
 441        .trailer_space  = MCIR2_UNIT * 10,
 442};
 443
 444/**
 445 * ir_mce_kbd_encode() - Encode a scancode as a stream of raw events
 446 *
 447 * @protocol:   protocol to encode
 448 * @scancode:   scancode to encode
 449 * @events:     array of raw ir events to write into
 450 * @max:        maximum size of @events
 451 *
 452 * Returns:     The number of events written.
 453 *              -ENOBUFS if there isn't enough space in the array to fit the
 454 *              encoding. In this case all @max events will have been written.
 455 */
 456static int ir_mce_kbd_encode(enum rc_proto protocol, u32 scancode,
 457                             struct ir_raw_event *events, unsigned int max)
 458{
 459        struct ir_raw_event *e = events;
 460        int len, ret;
 461        u64 raw;
 462
 463        if (protocol == RC_PROTO_MCIR2_KBD) {
 464                raw = scancode |
 465                      ((u64)MCIR2_KEYBOARD_HEADER << MCIR2_KEYBOARD_NBITS);
 466                len = MCIR2_KEYBOARD_NBITS + MCIR2_HEADER_NBITS;
 467        } else {
 468                raw = scancode |
 469                      ((u64)MCIR2_MOUSE_HEADER << MCIR2_MOUSE_NBITS);
 470                len = MCIR2_MOUSE_NBITS + MCIR2_HEADER_NBITS;
 471        }
 472
 473        ret = ir_raw_gen_manchester(&e, max, &ir_mce_kbd_timings, len, raw);
 474        if (ret < 0)
 475                return ret;
 476
 477        return e - events;
 478}
 479
 480static struct ir_raw_handler mce_kbd_handler = {
 481        .protocols      = RC_PROTO_BIT_MCIR2_KBD | RC_PROTO_BIT_MCIR2_MSE,
 482        .decode         = ir_mce_kbd_decode,
 483        .encode         = ir_mce_kbd_encode,
 484        .raw_register   = ir_mce_kbd_register,
 485        .raw_unregister = ir_mce_kbd_unregister,
 486        .carrier        = 36000,
 487        .min_timeout    = MCIR2_MAX_LEN + MCIR2_UNIT / 2,
 488};
 489
 490static int __init ir_mce_kbd_decode_init(void)
 491{
 492        ir_raw_handler_register(&mce_kbd_handler);
 493
 494        printk(KERN_INFO "IR MCE Keyboard/mouse protocol handler initialized\n");
 495        return 0;
 496}
 497
 498static void __exit ir_mce_kbd_decode_exit(void)
 499{
 500        ir_raw_handler_unregister(&mce_kbd_handler);
 501}
 502
 503module_init(ir_mce_kbd_decode_init);
 504module_exit(ir_mce_kbd_decode_exit);
 505
 506MODULE_LICENSE("GPL");
 507MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
 508MODULE_DESCRIPTION("MCE Keyboard/mouse IR protocol decoder");
 509