drivers/platform/x86/asus-nb-wmi.c

   1 /*
   2  * Asus Notebooks WMI hotkey driver
   3  *
   4  * Copyright(C) 2010 Corentin Chary <corentin.chary@gmail.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  22
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/input.h>
  27 #include <linux/input/sparse-keymap.h>
  28 #include <linux/fb.h>
  29 #include <linux/dmi.h>
  30 #include <linux/i8042.h>
  31
  32 #include "asus-wmi.h"
  33
  34 #define ASUS_NB_WMI_FILE        "asus-nb-wmi"
  35
  36 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>");
  37 MODULE_DESCRIPTION("Asus Notebooks WMI Hotkey Driver");
  38 MODULE_LICENSE("GPL");
  39
  40 #define ASUS_NB_WMI_EVENT_GUID  "0B3CBB35-E3C2-45ED-91C2-4C5A6D195D1C"
  41
  42 MODULE_ALIAS("wmi:"ASUS_NB_WMI_EVENT_GUID);
  43
  44 /*
  45  * WAPF defines the behavior of the Fn+Fx wlan key
  46  * The significance of values is yet to be found, but
  47  * most of the time:
  48  * Bit | Bluetooth | WLAN
  49  *  0  | Hardware  | Hardware
  50  *  1  | Hardware  | Software
  51  *  4  | Software  | Software
  52  */
  53 static int wapf = -1;
  54 module_param(wapf, uint, 0444);
  55 MODULE_PARM_DESC(wapf, "WAPF value");
  56
  57 static struct quirk_entry *quirks;
  58
  59 static bool asus_q500a_i8042_filter(unsigned char data, unsigned char str,
  60                               struct serio *port)
  61 {
  62         static bool extended;
  63         bool ret = false;
  64
  65         if (str & I8042_STR_AUXDATA)
  66                 return false;
  67
  68         if (unlikely(data == 0xe1)) {
  69                 extended = true;
  70                 ret = true;
  71         } else if (unlikely(extended)) {
  72                 extended = false;
  73                 ret = true;
  74         }
  75
  76         return ret;
  77 }
  78
  79 static struct quirk_entry quirk_asus_unknown = {
  80         .wapf = 0,
  81 };
  82
  83 static struct quirk_entry quirk_asus_q500a = {
  84         .i8042_filter = asus_q500a_i8042_filter,
  85 };
  86
  87 /*
  88  * For those machines that need software to control bt/wifi status
  89  * and can't adjust brightness through ACPI interface
  90  * and have duplicate events(ACPI and WMI) for display toggle
  91  */
  92 static struct quirk_entry quirk_asus_x55u = {
  93         .wapf = 4,
  94         .wmi_backlight_power = true,
  95         .no_display_toggle = true,
  96 };
  97
  98 static struct quirk_entry quirk_asus_wapf4 = {
  99         .wapf = 4,
 100 };
 101
 102 static struct quirk_entry quirk_asus_x200ca = {
 103         .wapf = 2,
 104 };
 105
 106 static struct quirk_entry quirk_asus_ux303ub = {
 107         .wmi_backlight_native = true,
 108 };
 109
 110 static struct quirk_entry quirk_asus_x550lb = {
 111         .xusb2pr = 0x01D9,
 112 };
 113
 114 static int dmi_matched(const struct dmi_system_id *dmi)
 115 {
 116         pr_info("Identified laptop model '%s'\n", dmi->ident);
 117         quirks = dmi->driver_data;
 118         return 1;
 119 }
 120
 121 static const struct dmi_system_id asus_quirks[] = {
 122         {
 123                 .callback = dmi_matched,
 124                 .ident = "ASUSTeK COMPUTER INC. Q500A",
 125                 .matches = {
 126                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 127                         DMI_MATCH(DMI_PRODUCT_NAME, "Q500A"),
 128                 },
 129                 .driver_data = &quirk_asus_q500a,
 130         },
 131         {
 132                 .callback = dmi_matched,
 133                 .ident = "ASUSTeK COMPUTER INC. U32U",
 134                 .matches = {
 135                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 136                         DMI_MATCH(DMI_PRODUCT_NAME, "U32U"),
 137                 },
 138                 /*
 139                  * Note this machine has a Brazos APU, and most Brazos Asus
 140                  * machines need quirk_asus_x55u / wmi_backlight_power but
 141                  * here acpi-video seems to work fine for backlight control.
 142                  */
 143                 .driver_data = &quirk_asus_wapf4,
 144         },
 145         {
 146                 .callback = dmi_matched,
 147                 .ident = "ASUSTeK COMPUTER INC. X401U",
 148                 .matches = {
 149                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 150                         DMI_MATCH(DMI_PRODUCT_NAME, "X401U"),
 151                 },
 152                 .driver_data = &quirk_asus_x55u,
 153         },
 154         {
 155                 .callback = dmi_matched,
 156                 .ident = "ASUSTeK COMPUTER INC. X401A",
 157                 .matches = {
 158                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 159                         DMI_MATCH(DMI_PRODUCT_NAME, "X401A"),
 160                 },
 161                 .driver_data = &quirk_asus_wapf4,
 162         },
 163         {
 164                 .callback = dmi_matched,
 165                 .ident = "ASUSTeK COMPUTER INC. X401A1",
 166                 .matches = {
 167                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 168                         DMI_MATCH(DMI_PRODUCT_NAME, "X401A1"),
 169                 },
 170                 .driver_data = &quirk_asus_wapf4,
 171         },
 172         {
 173                 .callback = dmi_matched,
 174                 .ident = "ASUSTeK COMPUTER INC. X45U",
 175                 .matches = {
 176                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 177                         DMI_MATCH(DMI_PRODUCT_NAME, "X45U"),
 178                 },
 179                 .driver_data = &quirk_asus_wapf4,
 180         },
 181         {
 182                 .callback = dmi_matched,
 183                 .ident = "ASUSTeK COMPUTER INC. X456UA",
 184                 .matches = {
 185                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 186                         DMI_MATCH(DMI_PRODUCT_NAME, "X456UA"),
 187                 },
 188                 .driver_data = &quirk_asus_wapf4,
 189         },
 190         {
 191                 .callback = dmi_matched,
 192                 .ident = "ASUSTeK COMPUTER INC. X456UF",
 193                 .matches = {
 194                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 195                         DMI_MATCH(DMI_PRODUCT_NAME, "X456UF"),
 196                 },
 197                 .driver_data = &quirk_asus_wapf4,
 198         },
 199         {
 200                 .callback = dmi_matched,
 201                 .ident = "ASUSTeK COMPUTER INC. X501U",
 202                 .matches = {
 203                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 204                         DMI_MATCH(DMI_PRODUCT_NAME, "X501U"),
 205                 },
 206                 .driver_data = &quirk_asus_x55u,
 207         },
 208         {
 209                 .callback = dmi_matched,
 210                 .ident = "ASUSTeK COMPUTER INC. X501A",
 211                 .matches = {
 212                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 213                         DMI_MATCH(DMI_PRODUCT_NAME, "X501A"),
 214                 },
 215                 .driver_data = &quirk_asus_wapf4,
 216         },
 217         {
 218                 .callback = dmi_matched,
 219                 .ident = "ASUSTeK COMPUTER INC. X501A1",
 220                 .matches = {
 221                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 222                         DMI_MATCH(DMI_PRODUCT_NAME, "X501A1"),
 223                 },
 224                 .driver_data = &quirk_asus_wapf4,
 225         },
 226         {
 227                 .callback = dmi_matched,
 228                 .ident = "ASUSTeK COMPUTER INC. X550CA",
 229                 .matches = {
 230                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 231                         DMI_MATCH(DMI_PRODUCT_NAME, "X550CA"),
 232                 },
 233                 .driver_data = &quirk_asus_wapf4,
 234         },
 235         {
 236                 .callback = dmi_matched,
 237                 .ident = "ASUSTeK COMPUTER INC. X550CC",
 238                 .matches = {
 239                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 240                         DMI_MATCH(DMI_PRODUCT_NAME, "X550CC"),
 241                 },
 242                 .driver_data = &quirk_asus_wapf4,
 243         },
 244         {
 245                 .callback = dmi_matched,
 246                 .ident = "ASUSTeK COMPUTER INC. X550CL",
 247                 .matches = {
 248                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 249                         DMI_MATCH(DMI_PRODUCT_NAME, "X550CL"),
 250                 },
 251                 .driver_data = &quirk_asus_wapf4,
 252         },
 253         {
 254                 .callback = dmi_matched,
 255                 .ident = "ASUSTeK COMPUTER INC. X550VB",
 256                 .matches = {
 257                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 258                         DMI_MATCH(DMI_PRODUCT_NAME, "X550VB"),
 259                 },
 260                 .driver_data = &quirk_asus_wapf4,
 261         },
 262         {
 263                 .callback = dmi_matched,
 264                 .ident = "ASUSTeK COMPUTER INC. X551CA",
 265                 .matches = {
 266                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 267                         DMI_MATCH(DMI_PRODUCT_NAME, "X551CA"),
 268                 },
 269                 .driver_data = &quirk_asus_wapf4,
 270         },
 271         {
 272                 .callback = dmi_matched,
 273                 .ident = "ASUSTeK COMPUTER INC. X55A",
 274                 .matches = {
 275                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 276                         DMI_MATCH(DMI_PRODUCT_NAME, "X55A"),
 277                 },
 278                 .driver_data = &quirk_asus_wapf4,
 279         },
 280         {
 281                 .callback = dmi_matched,
 282                 .ident = "ASUSTeK COMPUTER INC. X55C",
 283                 .matches = {
 284                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 285                         DMI_MATCH(DMI_PRODUCT_NAME, "X55C"),
 286                 },
 287                 .driver_data = &quirk_asus_wapf4,
 288         },
 289         {
 290                 .callback = dmi_matched,
 291                 .ident = "ASUSTeK COMPUTER INC. X55U",
 292                 .matches = {
 293                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 294                         DMI_MATCH(DMI_PRODUCT_NAME, "X55U"),
 295                 },
 296                 .driver_data = &quirk_asus_x55u,
 297         },
 298         {
 299                 .callback = dmi_matched,
 300                 .ident = "ASUSTeK COMPUTER INC. X55VD",
 301                 .matches = {
 302                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 303                         DMI_MATCH(DMI_PRODUCT_NAME, "X55VD"),
 304                 },
 305                 .driver_data = &quirk_asus_wapf4,
 306         },
 307         {
 308                 .callback = dmi_matched,
 309                 .ident = "ASUSTeK COMPUTER INC. X75A",
 310                 .matches = {
 311                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 312                         DMI_MATCH(DMI_PRODUCT_NAME, "X75A"),
 313                 },
 314                 .driver_data = &quirk_asus_wapf4,
 315         },
 316         {
 317                 .callback = dmi_matched,
 318                 .ident = "ASUSTeK COMPUTER INC. X75VBP",
 319                 .matches = {
 320                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 321                         DMI_MATCH(DMI_PRODUCT_NAME, "X75VBP"),
 322                 },
 323                 .driver_data = &quirk_asus_wapf4,
 324         },
 325         {
 326                 .callback = dmi_matched,
 327                 .ident = "ASUSTeK COMPUTER INC. X75VD",
 328                 .matches = {
 329                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 330                         DMI_MATCH(DMI_PRODUCT_NAME, "X75VD"),
 331                 },
 332                 .driver_data = &quirk_asus_wapf4,
 333         },
 334         {
 335                 .callback = dmi_matched,
 336                 .ident = "ASUSTeK COMPUTER INC. 1015E",
 337                 .matches = {
 338                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 339                         DMI_MATCH(DMI_PRODUCT_NAME, "1015E"),
 340                 },
 341                 .driver_data = &quirk_asus_wapf4,
 342         },
 343         {
 344                 .callback = dmi_matched,
 345                 .ident = "ASUSTeK COMPUTER INC. 1015U",
 346                 .matches = {
 347                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 348                         DMI_MATCH(DMI_PRODUCT_NAME, "1015U"),
 349                 },
 350                 .driver_data = &quirk_asus_wapf4,
 351         },
 352         {
 353                 .callback = dmi_matched,
 354                 .ident = "ASUSTeK COMPUTER INC. X200CA",
 355                 .matches = {
 356                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 357                         DMI_MATCH(DMI_PRODUCT_NAME, "X200CA"),
 358                 },
 359                 .driver_data = &quirk_asus_x200ca,
 360         },
 361         {
 362                 .callback = dmi_matched,
 363                 .ident = "ASUSTeK COMPUTER INC. UX303UB",
 364                 .matches = {
 365                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 366                         DMI_MATCH(DMI_PRODUCT_NAME, "UX303UB"),
 367                 },
 368                 .driver_data = &quirk_asus_ux303ub,
 369         },
 370         {
 371                 .callback = dmi_matched,
 372                 .ident = "ASUSTeK COMPUTER INC. X550LB",
 373                 .matches = {
 374                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 375                         DMI_MATCH(DMI_PRODUCT_NAME, "X550LB"),
 376                 },
 377                 .driver_data = &quirk_asus_x550lb,
 378         },
 379         {},
 380 };
 381
 382 static void asus_nb_wmi_quirks(struct asus_wmi_driver *driver)
 383 {
 384         int ret;
 385
 386         quirks = &quirk_asus_unknown;
 387         dmi_check_system(asus_quirks);
 388
 389         driver->quirks = quirks;
 390         driver->panel_power = FB_BLANK_UNBLANK;
 391
 392         /* overwrite the wapf setting if the wapf paramater is specified */
 393         if (wapf != -1)
 394                 quirks->wapf = wapf;
 395         else
 396                 wapf = quirks->wapf;
 397
 398         if (quirks->i8042_filter) {
 399                 ret = i8042_install_filter(quirks->i8042_filter);
 400                 if (ret) {
 401                         pr_warn("Unable to install key filter\n");
 402                         return;
 403                 }
 404                 pr_info("Using i8042 filter function for receiving events\n");
 405         }
 406 }
 407
 408 static const struct key_entry asus_nb_wmi_keymap[] = {
 409         { KE_KEY, ASUS_WMI_BRN_DOWN, { KEY_BRIGHTNESSDOWN } },
 410         { KE_KEY, ASUS_WMI_BRN_UP, { KEY_BRIGHTNESSUP } },
 411         { KE_KEY, 0x30, { KEY_VOLUMEUP } },
 412         { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
 413         { KE_KEY, 0x32, { KEY_MUTE } },
 414         { KE_KEY, 0x33, { KEY_DISPLAYTOGGLE } }, /* LCD on */
 415         { KE_KEY, 0x34, { KEY_DISPLAY_OFF } }, /* LCD off */
 416         { KE_KEY, 0x40, { KEY_PREVIOUSSONG } },
 417         { KE_KEY, 0x41, { KEY_NEXTSONG } },
 418         { KE_KEY, 0x43, { KEY_STOPCD } }, /* Stop/Eject */
 419         { KE_KEY, 0x45, { KEY_PLAYPAUSE } },
 420         { KE_KEY, 0x4c, { KEY_MEDIA } }, /* WMP Key */
 421         { KE_KEY, 0x50, { KEY_EMAIL } },
 422         { KE_KEY, 0x51, { KEY_WWW } },
 423         { KE_KEY, 0x55, { KEY_CALC } },
 424         { KE_IGNORE, 0x57, },  /* Battery mode */
 425         { KE_IGNORE, 0x58, },  /* AC mode */
 426         { KE_KEY, 0x5C, { KEY_F15 } },  /* Power Gear key */
 427         { KE_KEY, 0x5D, { KEY_WLAN } }, /* Wireless console Toggle */
 428         { KE_KEY, 0x5E, { KEY_WLAN } }, /* Wireless console Enable */
 429         { KE_KEY, 0x5F, { KEY_WLAN } }, /* Wireless console Disable */
 430         { KE_KEY, 0x60, { KEY_TOUCHPAD_ON } },
 431         { KE_KEY, 0x61, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD only */
 432         { KE_KEY, 0x62, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT only */
 433         { KE_KEY, 0x63, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT */
 434         { KE_KEY, 0x64, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV */
 435         { KE_KEY, 0x65, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV */
 436         { KE_KEY, 0x66, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV */
 437         { KE_KEY, 0x67, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV */
 438         { KE_KEY, 0x6B, { KEY_TOUCHPAD_TOGGLE } },
 439         { KE_IGNORE, 0x6E, },  /* Low Battery notification */
 440         { KE_KEY, 0x7a, { KEY_ALS_TOGGLE } }, /* Ambient Light Sensor Toggle */
 441         { KE_KEY, 0x7D, { KEY_BLUETOOTH } }, /* Bluetooth Enable */
 442         { KE_KEY, 0x7E, { KEY_BLUETOOTH } }, /* Bluetooth Disable */
 443         { KE_KEY, 0x82, { KEY_CAMERA } },
 444         { KE_KEY, 0x88, { KEY_RFKILL  } }, /* Radio Toggle Key */
 445         { KE_KEY, 0x8A, { KEY_PROG1 } }, /* Color enhancement mode */
 446         { KE_KEY, 0x8C, { KEY_SWITCHVIDEOMODE } }, /* SDSP DVI only */
 447         { KE_KEY, 0x8D, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + DVI */
 448         { KE_KEY, 0x8E, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + DVI */
 449         { KE_KEY, 0x8F, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + DVI */
 450         { KE_KEY, 0x90, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + DVI */
 451         { KE_KEY, 0x91, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV + DVI */
 452         { KE_KEY, 0x92, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV + DVI */
 453         { KE_KEY, 0x93, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV + DVI */
 454         { KE_KEY, 0x95, { KEY_MEDIA } },
 455         { KE_KEY, 0x99, { KEY_PHONE } },
 456         { KE_KEY, 0xA0, { KEY_SWITCHVIDEOMODE } }, /* SDSP HDMI only */
 457         { KE_KEY, 0xA1, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + HDMI */
 458         { KE_KEY, 0xA2, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + HDMI */
 459         { KE_KEY, 0xA3, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + HDMI */
 460         { KE_KEY, 0xA4, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + HDMI */
 461         { KE_KEY, 0xA5, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV + HDMI */
 462         { KE_KEY, 0xA6, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV + HDMI */
 463         { KE_KEY, 0xA7, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV + HDMI */
 464         { KE_KEY, 0xB5, { KEY_CALC } },
 465         { KE_KEY, 0xC4, { KEY_KBDILLUMUP } },
 466         { KE_KEY, 0xC5, { KEY_KBDILLUMDOWN } },
 467         { KE_IGNORE, 0xC6, },  /* Ambient Light Sensor notification */
 468         { KE_END, 0},
 469 };
 470
 471 static struct asus_wmi_driver asus_nb_wmi_driver = {
 472         .name = ASUS_NB_WMI_FILE,
 473         .owner = THIS_MODULE,
 474         .event_guid = ASUS_NB_WMI_EVENT_GUID,
 475         .keymap = asus_nb_wmi_keymap,
 476         .input_name = "Asus WMI hotkeys",
 477         .input_phys = ASUS_NB_WMI_FILE "/input0",
 478         .detect_quirks = asus_nb_wmi_quirks,
 479 };
 480
 481
 482 static int __init asus_nb_wmi_init(void)
 483 {
 484         return asus_wmi_register_driver(&asus_nb_wmi_driver);
 485 }
 486
 487 static void __exit asus_nb_wmi_exit(void)
 488 {
 489         asus_wmi_unregister_driver(&asus_nb_wmi_driver);
 490 }
 491
 492 module_init(asus_nb_wmi_init);
 493 module_exit(asus_nb_wmi_exit);