drivers/platform/x86/acer-wmi.c

   1 /*
   2  *  Acer WMI Laptop Extras
   3  *
   4  *  Copyright (C) 2007-2009     Carlos Corbacho <carlos@strangeworlds.co.uk>
   5  *
   6  *  Based on acer_acpi:
   7  *    Copyright (C) 2005-2007   E.M. Smith
   8  *    Copyright (C) 2007-2008   Carlos Corbacho <cathectic@gmail.com>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/dmi.h>
  32 #include <linux/fb.h>
  33 #include <linux/backlight.h>
  34 #include <linux/leds.h>
  35 #include <linux/platform_device.h>
  36 #include <linux/acpi.h>
  37 #include <linux/i8042.h>
  38 #include <linux/rfkill.h>
  39 #include <linux/workqueue.h>
  40 #include <linux/debugfs.h>
  41 #include <linux/slab.h>
  42 #include <linux/input.h>
  43 #include <linux/input/sparse-keymap.h>
  44
  45 #include <acpi/acpi_drivers.h>
  46
  47 MODULE_AUTHOR("Carlos Corbacho");
  48 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  49 MODULE_LICENSE("GPL");
  50
  51 /*
  52  * Magic Number
  53  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  54  * (it's also used in acerhk when directly accessing the BIOS)
  55  */
  56 #define ACER_AMW0_WRITE 0x9610
  57
  58 /*
  59  * Bit masks for the AMW0 interface
  60  */
  61 #define ACER_AMW0_WIRELESS_MASK  0x35
  62 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  63 #define ACER_AMW0_MAILLED_MASK   0x31
  64
  65 /*
  66  * Method IDs for WMID interface
  67  */
  68 #define ACER_WMID_GET_WIRELESS_METHODID         1
  69 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  70 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  71 #define ACER_WMID_SET_WIRELESS_METHODID         4
  72 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  73 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  74 #define ACER_WMID_GET_THREEG_METHODID           10
  75 #define ACER_WMID_SET_THREEG_METHODID           11
  76
  77 /*
  78  * Acer ACPI method GUIDs
  79  */
  80 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  81 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
  82 #define WMID_GUID1              "6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3"
  83 #define WMID_GUID2              "95764E09-FB56-4E83-B31A-37761F60994A"
  84 #define WMID_GUID3              "61EF69EA-865C-4BC3-A502-A0DEBA0CB531"
  85
  86 /*
  87  * Acer ACPI event GUIDs
  88  */
  89 #define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"
  90
  91 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  92 MODULE_ALIAS("wmi:6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3");
  93 MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
  94
  95 enum acer_wmi_event_ids {
  96         WMID_HOTKEY_EVENT = 0x1,
  97 };
  98
  99 static const struct key_entry acer_wmi_keymap[] = {
 100         {KE_KEY, 0x01, {KEY_WLAN} },     /* WiFi */
 101         {KE_KEY, 0x03, {KEY_WLAN} },     /* WiFi */
 102         {KE_KEY, 0x04, {KEY_WLAN} },     /* WiFi */
 103         {KE_KEY, 0x12, {KEY_BLUETOOTH} },       /* BT */
 104         {KE_KEY, 0x21, {KEY_PROG1} },    /* Backup */
 105         {KE_KEY, 0x22, {KEY_PROG2} },    /* Arcade */
 106         {KE_KEY, 0x23, {KEY_PROG3} },    /* P_Key */
 107         {KE_KEY, 0x24, {KEY_PROG4} },    /* Social networking_Key */
 108         {KE_IGNORE, 0x41, {KEY_MUTE} },
 109         {KE_IGNORE, 0x42, {KEY_PREVIOUSSONG} },
 110         {KE_IGNORE, 0x43, {KEY_NEXTSONG} },
 111         {KE_IGNORE, 0x44, {KEY_PLAYPAUSE} },
 112         {KE_IGNORE, 0x45, {KEY_STOP} },
 113         {KE_IGNORE, 0x48, {KEY_VOLUMEUP} },
 114         {KE_IGNORE, 0x49, {KEY_VOLUMEDOWN} },
 115         {KE_IGNORE, 0x61, {KEY_SWITCHVIDEOMODE} },
 116         {KE_IGNORE, 0x62, {KEY_BRIGHTNESSUP} },
 117         {KE_IGNORE, 0x63, {KEY_BRIGHTNESSDOWN} },
 118         {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
 119         {KE_IGNORE, 0x81, {KEY_SLEEP} },
 120         {KE_KEY, 0x82, {KEY_TOUCHPAD_TOGGLE} }, /* Touch Pad On/Off */
 121         {KE_IGNORE, 0x83, {KEY_TOUCHPAD_TOGGLE} },
 122         {KE_END, 0}
 123 };
 124
 125 static struct input_dev *acer_wmi_input_dev;
 126
 127 struct event_return_value {
 128         u8 function;
 129         u8 key_num;
 130         u16 device_state;
 131         u32 reserved;
 132 } __attribute__((packed));
 133
 134 /*
 135  * GUID3 Get Device Status device flags
 136  */
 137 #define ACER_WMID3_GDS_WIRELESS         (1<<0)  /* WiFi */
 138 #define ACER_WMID3_GDS_THREEG           (1<<6)  /* 3G */
 139 #define ACER_WMID3_GDS_WIMAX            (1<<7)  /* WiMAX */
 140 #define ACER_WMID3_GDS_BLUETOOTH        (1<<11) /* BT */
 141
 142 struct lm_input_params {
 143         u8 function_num;        /* Function Number */
 144         u16 commun_devices;     /* Communication type devices default status */
 145         u16 devices;            /* Other type devices default status */
 146         u8 lm_status;           /* Launch Manager Status */
 147         u16 reserved;
 148 } __attribute__((packed));
 149
 150 struct lm_return_value {
 151         u8 error_code;          /* Error Code */
 152         u8 ec_return_value;     /* EC Return Value */
 153         u16 reserved;
 154 } __attribute__((packed));
 155
 156 struct wmid3_gds_input_param {  /* Get Device Status input parameter */
 157         u8 function_num;        /* Function Number */
 158         u8 hotkey_number;       /* Hotkey Number */
 159         u16 devices;            /* Get Device */
 160 } __attribute__((packed));
 161
 162 struct wmid3_gds_return_value { /* Get Device Status return value*/
 163         u8 error_code;          /* Error Code */
 164         u8 ec_return_value;     /* EC Return Value */
 165         u16 devices;            /* Current Device Status */
 166         u32 reserved;
 167 } __attribute__((packed));
 168
 169 struct hotkey_function_type_aa {
 170         u8 type;
 171         u8 length;
 172         u16 handle;
 173         u16 commun_func_bitmap;
 174 } __attribute__((packed));
 175
 176 /*
 177  * Interface capability flags
 178  */
 179 #define ACER_CAP_MAILLED                (1<<0)
 180 #define ACER_CAP_WIRELESS               (1<<1)
 181 #define ACER_CAP_BLUETOOTH              (1<<2)
 182 #define ACER_CAP_BRIGHTNESS             (1<<3)
 183 #define ACER_CAP_THREEG                 (1<<4)
 184 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 185
 186 /*
 187  * Interface type flags
 188  */
 189 enum interface_flags {
 190         ACER_AMW0,
 191         ACER_AMW0_V2,
 192         ACER_WMID,
 193         ACER_WMID_v2,
 194 };
 195
 196 #define ACER_DEFAULT_WIRELESS  0
 197 #define ACER_DEFAULT_BLUETOOTH 0
 198 #define ACER_DEFAULT_MAILLED   0
 199 #define ACER_DEFAULT_THREEG    0
 200
 201 static int max_brightness = 0xF;
 202
 203 static int mailled = -1;
 204 static int brightness = -1;
 205 static int threeg = -1;
 206 static int force_series;
 207 static bool ec_raw_mode;
 208 static bool has_type_aa;
 209 static u16 commun_func_bitmap;
 210
 211 module_param(mailled, int, 0444);
 212 module_param(brightness, int, 0444);
 213 module_param(threeg, int, 0444);
 214 module_param(force_series, int, 0444);
 215 module_param(ec_raw_mode, bool, 0444);
 216 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 217 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 218 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 219 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 220 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
 221
 222 struct acer_data {
 223         int mailled;
 224         int threeg;
 225         int brightness;
 226 };
 227
 228 struct acer_debug {
 229         struct dentry *root;
 230         struct dentry *devices;
 231         u32 wmid_devices;
 232 };
 233
 234 static struct rfkill *wireless_rfkill;
 235 static struct rfkill *bluetooth_rfkill;
 236 static struct rfkill *threeg_rfkill;
 237 static bool rfkill_inited;
 238
 239 /* Each low-level interface must define at least some of the following */
 240 struct wmi_interface {
 241         /* The WMI device type */
 242         u32 type;
 243
 244         /* The capabilities this interface provides */
 245         u32 capability;
 246
 247         /* Private data for the current interface */
 248         struct acer_data data;
 249
 250         /* debugfs entries associated with this interface */
 251         struct acer_debug debug;
 252 };
 253
 254 /* The static interface pointer, points to the currently detected interface */
 255 static struct wmi_interface *interface;
 256
 257 /*
 258  * Embedded Controller quirks
 259  * Some laptops require us to directly access the EC to either enable or query
 260  * features that are not available through WMI.
 261  */
 262
 263 struct quirk_entry {
 264         u8 wireless;
 265         u8 mailled;
 266         s8 brightness;
 267         u8 bluetooth;
 268 };
 269
 270 static struct quirk_entry *quirks;
 271
 272 static void set_quirks(void)
 273 {
 274         if (!interface)
 275                 return;
 276
 277         if (quirks->mailled)
 278                 interface->capability |= ACER_CAP_MAILLED;
 279
 280         if (quirks->brightness)
 281                 interface->capability |= ACER_CAP_BRIGHTNESS;
 282 }
 283
 284 static int dmi_matched(const struct dmi_system_id *dmi)
 285 {
 286         quirks = dmi->driver_data;
 287         return 1;
 288 }
 289
 290 static struct quirk_entry quirk_unknown = {
 291 };
 292
 293 static struct quirk_entry quirk_acer_aspire_1520 = {
 294         .brightness = -1,
 295 };
 296
 297 static struct quirk_entry quirk_acer_travelmate_2490 = {
 298         .mailled = 1,
 299 };
 300
 301 /* This AMW0 laptop has no bluetooth */
 302 static struct quirk_entry quirk_medion_md_98300 = {
 303         .wireless = 1,
 304 };
 305
 306 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 307         .wireless = 2,
 308 };
 309
 310 static struct quirk_entry quirk_lenovo_ideapad_s205 = {
 311         .wireless = 3,
 312 };
 313
 314 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 315 static struct dmi_system_id __devinitdata acer_blacklist[] = {
 316         {
 317                 .ident = "Acer Aspire One (SSD)",
 318                 .matches = {
 319                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 320                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
 321                 },
 322         },
 323         {
 324                 .ident = "Acer Aspire One (HDD)",
 325                 .matches = {
 326                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 327                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
 328                 },
 329         },
 330         {}
 331 };
 332
 333 static struct dmi_system_id acer_quirks[] = {
 334         {
 335                 .callback = dmi_matched,
 336                 .ident = "Acer Aspire 1360",
 337                 .matches = {
 338                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 339                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 340                 },
 341                 .driver_data = &quirk_acer_aspire_1520,
 342         },
 343         {
 344                 .callback = dmi_matched,
 345                 .ident = "Acer Aspire 1520",
 346                 .matches = {
 347                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 348                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 349                 },
 350                 .driver_data = &quirk_acer_aspire_1520,
 351         },
 352         {
 353                 .callback = dmi_matched,
 354                 .ident = "Acer Aspire 3100",
 355                 .matches = {
 356                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 357                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 358                 },
 359                 .driver_data = &quirk_acer_travelmate_2490,
 360         },
 361         {
 362                 .callback = dmi_matched,
 363                 .ident = "Acer Aspire 3610",
 364                 .matches = {
 365                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 366                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 367                 },
 368                 .driver_data = &quirk_acer_travelmate_2490,
 369         },
 370         {
 371                 .callback = dmi_matched,
 372                 .ident = "Acer Aspire 5100",
 373                 .matches = {
 374                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 375                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 376                 },
 377                 .driver_data = &quirk_acer_travelmate_2490,
 378         },
 379         {
 380                 .callback = dmi_matched,
 381                 .ident = "Acer Aspire 5610",
 382                 .matches = {
 383                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 384                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 385                 },
 386                 .driver_data = &quirk_acer_travelmate_2490,
 387         },
 388         {
 389                 .callback = dmi_matched,
 390                 .ident = "Acer Aspire 5630",
 391                 .matches = {
 392                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 393                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 394                 },
 395                 .driver_data = &quirk_acer_travelmate_2490,
 396         },
 397         {
 398                 .callback = dmi_matched,
 399                 .ident = "Acer Aspire 5650",
 400                 .matches = {
 401                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 402                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 403                 },
 404                 .driver_data = &quirk_acer_travelmate_2490,
 405         },
 406         {
 407                 .callback = dmi_matched,
 408                 .ident = "Acer Aspire 5680",
 409                 .matches = {
 410                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 411                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 412                 },
 413                 .driver_data = &quirk_acer_travelmate_2490,
 414         },
 415         {
 416                 .callback = dmi_matched,
 417                 .ident = "Acer Aspire 9110",
 418                 .matches = {
 419                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 420                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 421                 },
 422                 .driver_data = &quirk_acer_travelmate_2490,
 423         },
 424         {
 425                 .callback = dmi_matched,
 426                 .ident = "Acer TravelMate 2490",
 427                 .matches = {
 428                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 429                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 430                 },
 431                 .driver_data = &quirk_acer_travelmate_2490,
 432         },
 433         {
 434                 .callback = dmi_matched,
 435                 .ident = "Acer TravelMate 4200",
 436                 .matches = {
 437                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 438                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 439                 },
 440                 .driver_data = &quirk_acer_travelmate_2490,
 441         },
 442         {
 443                 .callback = dmi_matched,
 444                 .ident = "Fujitsu Siemens Amilo Li 1718",
 445                 .matches = {
 446                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 447                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 448                 },
 449                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 450         },
 451         {
 452                 .callback = dmi_matched,
 453                 .ident = "Medion MD 98300",
 454                 .matches = {
 455                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 456                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 457                 },
 458                 .driver_data = &quirk_medion_md_98300,
 459         },
 460         {
 461                 .callback = dmi_matched,
 462                 .ident = "Lenovo Ideapad S205",
 463                 .matches = {
 464                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 465                         DMI_MATCH(DMI_PRODUCT_NAME, "10382LG"),
 466                 },
 467                 .driver_data = &quirk_lenovo_ideapad_s205,
 468         },
 469         {
 470                 .callback = dmi_matched,
 471                 .ident = "Lenovo 3000 N200",
 472                 .matches = {
 473                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 474                         DMI_MATCH(DMI_PRODUCT_NAME, "0687A31"),
 475                 },
 476                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 477         },
 478         {}
 479 };
 480
 481 /* Find which quirks are needed for a particular vendor/ model pair */
 482 static void find_quirks(void)
 483 {
 484         if (!force_series) {
 485                 dmi_check_system(acer_quirks);
 486         } else if (force_series == 2490) {
 487                 quirks = &quirk_acer_travelmate_2490;
 488         }
 489
 490         if (quirks == NULL)
 491                 quirks = &quirk_unknown;
 492
 493         set_quirks();
 494 }
 495
 496 /*
 497  * General interface convenience methods
 498  */
 499
 500 static bool has_cap(u32 cap)
 501 {
 502         if ((interface->capability & cap) != 0)
 503                 return 1;
 504
 505         return 0;
 506 }
 507
 508 /*
 509  * AMW0 (V1) interface
 510  */
 511 struct wmab_args {
 512         u32 eax;
 513         u32 ebx;
 514         u32 ecx;
 515         u32 edx;
 516 };
 517
 518 struct wmab_ret {
 519         u32 eax;
 520         u32 ebx;
 521         u32 ecx;
 522         u32 edx;
 523         u32 eex;
 524 };
 525
 526 static acpi_status wmab_execute(struct wmab_args *regbuf,
 527 struct acpi_buffer *result)
 528 {
 529         struct acpi_buffer input;
 530         acpi_status status;
 531         input.length = sizeof(struct wmab_args);
 532         input.pointer = (u8 *)regbuf;
 533
 534         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 535
 536         return status;
 537 }
 538
 539 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 540 struct wmi_interface *iface)
 541 {
 542         int err;
 543         u8 result;
 544
 545         switch (cap) {
 546         case ACER_CAP_MAILLED:
 547                 switch (quirks->mailled) {
 548                 default:
 549                         err = ec_read(0xA, &result);
 550                         if (err)
 551                                 return AE_ERROR;
 552                         *value = (result >> 7) & 0x1;
 553                         return AE_OK;
 554                 }
 555                 break;
 556         case ACER_CAP_WIRELESS:
 557                 switch (quirks->wireless) {
 558                 case 1:
 559                         err = ec_read(0x7B, &result);
 560                         if (err)
 561                                 return AE_ERROR;
 562                         *value = result & 0x1;
 563                         return AE_OK;
 564                 case 2:
 565                         err = ec_read(0x71, &result);
 566                         if (err)
 567                                 return AE_ERROR;
 568                         *value = result & 0x1;
 569                         return AE_OK;
 570                 case 3:
 571                         err = ec_read(0x78, &result);
 572                         if (err)
 573                                 return AE_ERROR;
 574                         *value = result & 0x1;
 575                         return AE_OK;
 576                 default:
 577                         err = ec_read(0xA, &result);
 578                         if (err)
 579                                 return AE_ERROR;
 580                         *value = (result >> 2) & 0x1;
 581                         return AE_OK;
 582                 }
 583                 break;
 584         case ACER_CAP_BLUETOOTH:
 585                 switch (quirks->bluetooth) {
 586                 default:
 587                         err = ec_read(0xA, &result);
 588                         if (err)
 589                                 return AE_ERROR;
 590                         *value = (result >> 4) & 0x1;
 591                         return AE_OK;
 592                 }
 593                 break;
 594         case ACER_CAP_BRIGHTNESS:
 595                 switch (quirks->brightness) {
 596                 default:
 597                         err = ec_read(0x83, &result);
 598                         if (err)
 599                                 return AE_ERROR;
 600                         *value = result;
 601                         return AE_OK;
 602                 }
 603                 break;
 604         default:
 605                 return AE_ERROR;
 606         }
 607         return AE_OK;
 608 }
 609
 610 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 611 {
 612         struct wmab_args args;
 613
 614         args.eax = ACER_AMW0_WRITE;
 615         args.ebx = value ? (1<<8) : 0;
 616         args.ecx = args.edx = 0;
 617
 618         switch (cap) {
 619         case ACER_CAP_MAILLED:
 620                 if (value > 1)
 621                         return AE_BAD_PARAMETER;
 622                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 623                 break;
 624         case ACER_CAP_WIRELESS:
 625                 if (value > 1)
 626                         return AE_BAD_PARAMETER;
 627                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 628                 break;
 629         case ACER_CAP_BLUETOOTH:
 630                 if (value > 1)
 631                         return AE_BAD_PARAMETER;
 632                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 633                 break;
 634         case ACER_CAP_BRIGHTNESS:
 635                 if (value > max_brightness)
 636                         return AE_BAD_PARAMETER;
 637                 switch (quirks->brightness) {
 638                 default:
 639                         return ec_write(0x83, value);
 640                         break;
 641                 }
 642         default:
 643                 return AE_ERROR;
 644         }
 645
 646         /* Actually do the set */
 647         return wmab_execute(&args, NULL);
 648 }
 649
 650 static acpi_status AMW0_find_mailled(void)
 651 {
 652         struct wmab_args args;
 653         struct wmab_ret ret;
 654         acpi_status status = AE_OK;
 655         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 656         union acpi_object *obj;
 657
 658         args.eax = 0x86;
 659         args.ebx = args.ecx = args.edx = 0;
 660
 661         status = wmab_execute(&args, &out);
 662         if (ACPI_FAILURE(status))
 663                 return status;
 664
 665         obj = (union acpi_object *) out.pointer;
 666         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 667         obj->buffer.length == sizeof(struct wmab_ret)) {
 668                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 669         } else {
 670                 kfree(out.pointer);
 671                 return AE_ERROR;
 672         }
 673
 674         if (ret.eex & 0x1)
 675                 interface->capability |= ACER_CAP_MAILLED;
 676
 677         kfree(out.pointer);
 678
 679         return AE_OK;
 680 }
 681
 682 static int AMW0_set_cap_acpi_check_device_found;
 683
 684 static acpi_status AMW0_set_cap_acpi_check_device_cb(acpi_handle handle,
 685         u32 level, void *context, void **retval)
 686 {
 687         AMW0_set_cap_acpi_check_device_found = 1;
 688         return AE_OK;
 689 }
 690
 691 static const struct acpi_device_id norfkill_ids[] = {
 692         { "VPC2004", 0},
 693         { "IBM0068", 0},
 694         { "LEN0068", 0},
 695         { "", 0},
 696 };
 697
 698 static int AMW0_set_cap_acpi_check_device(void)
 699 {
 700         const struct acpi_device_id *id;
 701
 702         for (id = norfkill_ids; id->id[0]; id++)
 703                 acpi_get_devices(id->id, AMW0_set_cap_acpi_check_device_cb,
 704                                 NULL, NULL);
 705         return AMW0_set_cap_acpi_check_device_found;
 706 }
 707
 708 static acpi_status AMW0_set_capabilities(void)
 709 {
 710         struct wmab_args args;
 711         struct wmab_ret ret;
 712         acpi_status status;
 713         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 714         union acpi_object *obj;
 715
 716         /*
 717          * On laptops with this strange GUID (non Acer), normal probing doesn't
 718          * work.
 719          */
 720         if (wmi_has_guid(AMW0_GUID2)) {
 721                 if ((quirks != &quirk_unknown) ||
 722                     !AMW0_set_cap_acpi_check_device())
 723                         interface->capability |= ACER_CAP_WIRELESS;
 724                 return AE_OK;
 725         }
 726
 727         args.eax = ACER_AMW0_WRITE;
 728         args.ecx = args.edx = 0;
 729
 730         args.ebx = 0xa2 << 8;
 731         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 732
 733         status = wmab_execute(&args, &out);
 734         if (ACPI_FAILURE(status))
 735                 return status;
 736
 737         obj = out.pointer;
 738         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 739         obj->buffer.length == sizeof(struct wmab_ret)) {
 740                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 741         } else {
 742                 status = AE_ERROR;
 743                 goto out;
 744         }
 745
 746         if (ret.eax & 0x1)
 747                 interface->capability |= ACER_CAP_WIRELESS;
 748
 749         args.ebx = 2 << 8;
 750         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 751
 752         /*
 753          * It's ok to use existing buffer for next wmab_execute call.
 754          * But we need to kfree(out.pointer) if next wmab_execute fail.
 755          */
 756         status = wmab_execute(&args, &out);
 757         if (ACPI_FAILURE(status))
 758                 goto out;
 759
 760         obj = (union acpi_object *) out.pointer;
 761         if (obj && obj->type == ACPI_TYPE_BUFFER
 762         && obj->buffer.length == sizeof(struct wmab_ret)) {
 763                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 764         } else {
 765                 status = AE_ERROR;
 766                 goto out;
 767         }
 768
 769         if (ret.eax & 0x1)
 770                 interface->capability |= ACER_CAP_BLUETOOTH;
 771
 772         /*
 773          * This appears to be safe to enable, since all Wistron based laptops
 774          * appear to use the same EC register for brightness, even if they
 775          * differ for wireless, etc
 776          */
 777         if (quirks->brightness >= 0)
 778                 interface->capability |= ACER_CAP_BRIGHTNESS;
 779
 780         status = AE_OK;
 781 out:
 782         kfree(out.pointer);
 783         return status;
 784 }
 785
 786 static struct wmi_interface AMW0_interface = {
 787         .type = ACER_AMW0,
 788 };
 789
 790 static struct wmi_interface AMW0_V2_interface = {
 791         .type = ACER_AMW0_V2,
 792 };
 793
 794 /*
 795  * New interface (The WMID interface)
 796  */
 797 static acpi_status
 798 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 799 {
 800         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 801         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 802         union acpi_object *obj;
 803         u32 tmp;
 804         acpi_status status;
 805
 806         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 807
 808         if (ACPI_FAILURE(status))
 809                 return status;
 810
 811         obj = (union acpi_object *) result.pointer;
 812         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 813                 (obj->buffer.length == sizeof(u32) ||
 814                 obj->buffer.length == sizeof(u64))) {
 815                 tmp = *((u32 *) obj->buffer.pointer);
 816         } else if (obj->type == ACPI_TYPE_INTEGER) {
 817                 tmp = (u32) obj->integer.value;
 818         } else {
 819                 tmp = 0;
 820         }
 821
 822         if (out)
 823                 *out = tmp;
 824
 825         kfree(result.pointer);
 826
 827         return status;
 828 }
 829
 830 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 831 struct wmi_interface *iface)
 832 {
 833         acpi_status status;
 834         u8 tmp;
 835         u32 result, method_id = 0;
 836
 837         switch (cap) {
 838         case ACER_CAP_WIRELESS:
 839                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 840                 break;
 841         case ACER_CAP_BLUETOOTH:
 842                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 843                 break;
 844         case ACER_CAP_BRIGHTNESS:
 845                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 846                 break;
 847         case ACER_CAP_THREEG:
 848                 method_id = ACER_WMID_GET_THREEG_METHODID;
 849                 break;
 850         case ACER_CAP_MAILLED:
 851                 if (quirks->mailled == 1) {
 852                         ec_read(0x9f, &tmp);
 853                         *value = tmp & 0x1;
 854                         return 0;
 855                 }
 856         default:
 857                 return AE_ERROR;
 858         }
 859         status = WMI_execute_u32(method_id, 0, &result);
 860
 861         if (ACPI_SUCCESS(status))
 862                 *value = (u8)result;
 863
 864         return status;
 865 }
 866
 867 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 868 {
 869         u32 method_id = 0;
 870         char param;
 871
 872         switch (cap) {
 873         case ACER_CAP_BRIGHTNESS:
 874                 if (value > max_brightness)
 875                         return AE_BAD_PARAMETER;
 876                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 877                 break;
 878         case ACER_CAP_WIRELESS:
 879                 if (value > 1)
 880                         return AE_BAD_PARAMETER;
 881                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 882                 break;
 883         case ACER_CAP_BLUETOOTH:
 884                 if (value > 1)
 885                         return AE_BAD_PARAMETER;
 886                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 887                 break;
 888         case ACER_CAP_THREEG:
 889                 if (value > 1)
 890                         return AE_BAD_PARAMETER;
 891                 method_id = ACER_WMID_SET_THREEG_METHODID;
 892                 break;
 893         case ACER_CAP_MAILLED:
 894                 if (value > 1)
 895                         return AE_BAD_PARAMETER;
 896                 if (quirks->mailled == 1) {
 897                         param = value ? 0x92 : 0x93;
 898                         i8042_lock_chip();
 899                         i8042_command(&param, 0x1059);
 900                         i8042_unlock_chip();
 901                         return 0;
 902                 }
 903                 break;
 904         default:
 905                 return AE_ERROR;
 906         }
 907         return WMI_execute_u32(method_id, (u32)value, NULL);
 908 }
 909
 910 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
 911 {
 912         struct wmid3_gds_return_value return_value;
 913         acpi_status status;
 914         union acpi_object *obj;
 915         struct wmid3_gds_input_param params = {
 916                 .function_num = 0x1,
 917                 .hotkey_number = 0x01,
 918                 .devices = device,
 919         };
 920         struct acpi_buffer input = {
 921                 sizeof(struct wmid3_gds_input_param),
 922                 &params
 923         };
 924         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 925
 926         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
 927         if (ACPI_FAILURE(status))
 928                 return status;
 929
 930         obj = output.pointer;
 931
 932         if (!obj)
 933                 return AE_ERROR;
 934         else if (obj->type != ACPI_TYPE_BUFFER) {
 935                 kfree(obj);
 936                 return AE_ERROR;
 937         }
 938         if (obj->buffer.length != 8) {
 939                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
 940                 kfree(obj);
 941                 return AE_ERROR;
 942         }
 943
 944         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
 945         kfree(obj);
 946
 947         if (return_value.error_code || return_value.ec_return_value)
 948                 pr_warn("Get 0x%x Device Status failed: 0x%x - 0x%x\n",
 949                         device,
 950                         return_value.error_code,
 951                         return_value.ec_return_value);
 952         else
 953                 *value = !!(return_value.devices & device);
 954
 955         return status;
 956 }
 957
 958 static acpi_status wmid_v2_get_u32(u32 *value, u32 cap)
 959 {
 960         u16 device;
 961
 962         switch (cap) {
 963         case ACER_CAP_WIRELESS:
 964                 device = ACER_WMID3_GDS_WIRELESS;
 965                 break;
 966         case ACER_CAP_BLUETOOTH:
 967                 device = ACER_WMID3_GDS_BLUETOOTH;
 968                 break;
 969         case ACER_CAP_THREEG:
 970                 device = ACER_WMID3_GDS_THREEG;
 971                 break;
 972         default:
 973                 return AE_ERROR;
 974         }
 975         return wmid3_get_device_status(value, device);
 976 }
 977
 978 static acpi_status wmid3_set_device_status(u32 value, u16 device)
 979 {
 980         struct wmid3_gds_return_value return_value;
 981         acpi_status status;
 982         union acpi_object *obj;
 983         u16 devices;
 984         struct wmid3_gds_input_param params = {
 985                 .function_num = 0x1,
 986                 .hotkey_number = 0x01,
 987                 .devices = commun_func_bitmap,
 988         };
 989         struct acpi_buffer input = {
 990                 sizeof(struct wmid3_gds_input_param),
 991                 &params
 992         };
 993         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 994         struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
 995
 996         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
 997         if (ACPI_FAILURE(status))
 998                 return status;
 999
1000         obj = output.pointer;
1001
1002         if (!obj)
1003                 return AE_ERROR;
1004         else if (obj->type != ACPI_TYPE_BUFFER) {
1005                 kfree(obj);
1006                 return AE_ERROR;
1007         }
1008         if (obj->buffer.length != 8) {
1009                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1010                 kfree(obj);
1011                 return AE_ERROR;
1012         }
1013
1014         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1015         kfree(obj);
1016
1017         if (return_value.error_code || return_value.ec_return_value) {
1018                 pr_warn("Get Current Device Status failed: 0x%x - 0x%x\n",
1019                         return_value.error_code,
1020                         return_value.ec_return_value);
1021                 return status;
1022         }
1023
1024         devices = return_value.devices;
1025         params.function_num = 0x2;
1026         params.hotkey_number = 0x01;
1027         params.devices = (value) ? (devices | device) : (devices & ~device);
1028
1029         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output2);
1030         if (ACPI_FAILURE(status))
1031                 return status;
1032
1033         obj = output2.pointer;
1034
1035         if (!obj)
1036                 return AE_ERROR;
1037         else if (obj->type != ACPI_TYPE_BUFFER) {
1038                 kfree(obj);
1039                 return AE_ERROR;
1040         }
1041         if (obj->buffer.length != 4) {
1042                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1043                 kfree(obj);
1044                 return AE_ERROR;
1045         }
1046
1047         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1048         kfree(obj);
1049
1050         if (return_value.error_code || return_value.ec_return_value)
1051                 pr_warn("Set Device Status failed: 0x%x - 0x%x\n",
1052                         return_value.error_code,
1053                         return_value.ec_return_value);
1054
1055         return status;
1056 }
1057
1058 static acpi_status wmid_v2_set_u32(u32 value, u32 cap)
1059 {
1060         u16 device;
1061
1062         switch (cap) {
1063         case ACER_CAP_WIRELESS:
1064                 device = ACER_WMID3_GDS_WIRELESS;
1065                 break;
1066         case ACER_CAP_BLUETOOTH:
1067                 device = ACER_WMID3_GDS_BLUETOOTH;
1068                 break;
1069         case ACER_CAP_THREEG:
1070                 device = ACER_WMID3_GDS_THREEG;
1071                 break;
1072         default:
1073                 return AE_ERROR;
1074         }
1075         return wmid3_set_device_status(value, device);
1076 }
1077
1078 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
1079 {
1080         struct hotkey_function_type_aa *type_aa;
1081
1082         /* We are looking for OEM-specific Type AAh */
1083         if (header->type != 0xAA)
1084                 return;
1085
1086         has_type_aa = true;
1087         type_aa = (struct hotkey_function_type_aa *) header;
1088
1089         pr_info("Function bitmap for Communication Button: 0x%x\n",
1090                 type_aa->commun_func_bitmap);
1091         commun_func_bitmap = type_aa->commun_func_bitmap;
1092
1093         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
1094                 interface->capability |= ACER_CAP_WIRELESS;
1095         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
1096                 interface->capability |= ACER_CAP_THREEG;
1097         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
1098                 interface->capability |= ACER_CAP_BLUETOOTH;
1099 }
1100
1101 static acpi_status WMID_set_capabilities(void)
1102 {
1103         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1104         union acpi_object *obj;
1105         acpi_status status;
1106         u32 devices;
1107
1108         status = wmi_query_block(WMID_GUID2, 1, &out);
1109         if (ACPI_FAILURE(status))
1110                 return status;
1111
1112         obj = (union acpi_object *) out.pointer;
1113         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1114                 (obj->buffer.length == sizeof(u32) ||
1115                 obj->buffer.length == sizeof(u64))) {
1116                 devices = *((u32 *) obj->buffer.pointer);
1117         } else if (obj->type == ACPI_TYPE_INTEGER) {
1118                 devices = (u32) obj->integer.value;
1119         } else {
1120                 kfree(out.pointer);
1121                 return AE_ERROR;
1122         }
1123
1124         pr_info("Function bitmap for Communication Device: 0x%x\n", devices);
1125         if (devices & 0x07)
1126                 interface->capability |= ACER_CAP_WIRELESS;
1127         if (devices & 0x40)
1128                 interface->capability |= ACER_CAP_THREEG;
1129         if (devices & 0x10)
1130                 interface->capability |= ACER_CAP_BLUETOOTH;
1131
1132         if (!(devices & 0x20))
1133                 max_brightness = 0x9;
1134
1135         kfree(out.pointer);
1136         return status;
1137 }
1138
1139 static struct wmi_interface wmid_interface = {
1140         .type = ACER_WMID,
1141 };
1142
1143 static struct wmi_interface wmid_v2_interface = {
1144         .type = ACER_WMID_v2,
1145 };
1146
1147 /*
1148  * Generic Device (interface-independent)
1149  */
1150
1151 static acpi_status get_u32(u32 *value, u32 cap)
1152 {
1153         acpi_status status = AE_ERROR;
1154
1155         switch (interface->type) {
1156         case ACER_AMW0:
1157                 status = AMW0_get_u32(value, cap, interface);
1158                 break;
1159         case ACER_AMW0_V2:
1160                 if (cap == ACER_CAP_MAILLED) {
1161                         status = AMW0_get_u32(value, cap, interface);
1162                         break;
1163                 }
1164         case ACER_WMID:
1165                 status = WMID_get_u32(value, cap, interface);
1166                 break;
1167         case ACER_WMID_v2:
1168                 if (cap & (ACER_CAP_WIRELESS |
1169                            ACER_CAP_BLUETOOTH |
1170                            ACER_CAP_THREEG))
1171                         status = wmid_v2_get_u32(value, cap);
1172                 else if (wmi_has_guid(WMID_GUID2))
1173                         status = WMID_get_u32(value, cap, interface);
1174                 break;
1175         }
1176
1177         return status;
1178 }
1179
1180 static acpi_status set_u32(u32 value, u32 cap)
1181 {
1182         acpi_status status;
1183
1184         if (interface->capability & cap) {
1185                 switch (interface->type) {
1186                 case ACER_AMW0:
1187                         return AMW0_set_u32(value, cap, interface);
1188                 case ACER_AMW0_V2:
1189                         if (cap == ACER_CAP_MAILLED)
1190                                 return AMW0_set_u32(value, cap, interface);
1191
1192                         /*
1193                          * On some models, some WMID methods don't toggle
1194                          * properly. For those cases, we want to run the AMW0
1195                          * method afterwards to be certain we've really toggled
1196                          * the device state.
1197                          */
1198                         if (cap == ACER_CAP_WIRELESS ||
1199                                 cap == ACER_CAP_BLUETOOTH) {
1200                                 status = WMID_set_u32(value, cap, interface);
1201                                 if (ACPI_FAILURE(status))
1202                                         return status;
1203
1204                                 return AMW0_set_u32(value, cap, interface);
1205                         }
1206                 case ACER_WMID:
1207                         return WMID_set_u32(value, cap, interface);
1208                 case ACER_WMID_v2:
1209                         if (cap & (ACER_CAP_WIRELESS |
1210                                    ACER_CAP_BLUETOOTH |
1211                                    ACER_CAP_THREEG))
1212                                 return wmid_v2_set_u32(value, cap);
1213                         else if (wmi_has_guid(WMID_GUID2))
1214                                 return WMID_set_u32(value, cap, interface);
1215                 default:
1216                         return AE_BAD_PARAMETER;
1217                 }
1218         }
1219         return AE_BAD_PARAMETER;
1220 }
1221
1222 static void __init acer_commandline_init(void)
1223 {
1224         /*
1225          * These will all fail silently if the value given is invalid, or the
1226          * capability isn't available on the given interface
1227          */
1228         if (mailled >= 0)
1229                 set_u32(mailled, ACER_CAP_MAILLED);
1230         if (!has_type_aa && threeg >= 0)
1231                 set_u32(threeg, ACER_CAP_THREEG);
1232         if (brightness >= 0)
1233                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
1234 }
1235
1236 /*
1237  * LED device (Mail LED only, no other LEDs known yet)
1238  */
1239 static void mail_led_set(struct led_classdev *led_cdev,
1240 enum led_brightness value)
1241 {
1242         set_u32(value, ACER_CAP_MAILLED);
1243 }
1244
1245 static struct led_classdev mail_led = {
1246         .name = "acer-wmi::mail",
1247         .brightness_set = mail_led_set,
1248 };
1249
1250 static int __devinit acer_led_init(struct device *dev)
1251 {
1252         return led_classdev_register(dev, &mail_led);
1253 }
1254
1255 static void acer_led_exit(void)
1256 {
1257         set_u32(LED_OFF, ACER_CAP_MAILLED);
1258         led_classdev_unregister(&mail_led);
1259 }
1260
1261 /*
1262  * Backlight device
1263  */
1264 static struct backlight_device *acer_backlight_device;
1265
1266 static int read_brightness(struct backlight_device *bd)
1267 {
1268         u32 value;
1269         get_u32(&value, ACER_CAP_BRIGHTNESS);
1270         return value;
1271 }
1272
1273 static int update_bl_status(struct backlight_device *bd)
1274 {
1275         int intensity = bd->props.brightness;
1276
1277         if (bd->props.power != FB_BLANK_UNBLANK)
1278                 intensity = 0;
1279         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1280                 intensity = 0;
1281
1282         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1283
1284         return 0;
1285 }
1286
1287 static const struct backlight_ops acer_bl_ops = {
1288         .get_brightness = read_brightness,
1289         .update_status = update_bl_status,
1290 };
1291
1292 static int __devinit acer_backlight_init(struct device *dev)
1293 {
1294         struct backlight_properties props;
1295         struct backlight_device *bd;
1296
1297         memset(&props, 0, sizeof(struct backlight_properties));
1298         props.type = BACKLIGHT_PLATFORM;
1299         props.max_brightness = max_brightness;
1300         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1301                                        &props);
1302         if (IS_ERR(bd)) {
1303                 pr_err("Could not register Acer backlight device\n");
1304                 acer_backlight_device = NULL;
1305                 return PTR_ERR(bd);
1306         }
1307
1308         acer_backlight_device = bd;
1309
1310         bd->props.power = FB_BLANK_UNBLANK;
1311         bd->props.brightness = read_brightness(bd);
1312         backlight_update_status(bd);
1313         return 0;
1314 }
1315
1316 static void acer_backlight_exit(void)
1317 {
1318         backlight_device_unregister(acer_backlight_device);
1319 }
1320
1321 /*
1322  * Rfkill devices
1323  */
1324 static void acer_rfkill_update(struct work_struct *ignored);
1325 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1326 static void acer_rfkill_update(struct work_struct *ignored)
1327 {
1328         u32 state;
1329         acpi_status status;
1330
1331         if (has_cap(ACER_CAP_WIRELESS)) {
1332                 status = get_u32(&state, ACER_CAP_WIRELESS);
1333                 if (ACPI_SUCCESS(status)) {
1334                         if (quirks->wireless == 3)
1335                                 rfkill_set_hw_state(wireless_rfkill, !state);
1336                         else
1337                                 rfkill_set_sw_state(wireless_rfkill, !state);
1338                 }
1339         }
1340
1341         if (has_cap(ACER_CAP_BLUETOOTH)) {
1342                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1343                 if (ACPI_SUCCESS(status))
1344                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1345         }
1346
1347         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1348                 status = get_u32(&state, ACER_WMID3_GDS_THREEG);
1349                 if (ACPI_SUCCESS(status))
1350                         rfkill_set_sw_state(threeg_rfkill, !state);
1351         }
1352
1353         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1354 }
1355
1356 static int acer_rfkill_set(void *data, bool blocked)
1357 {
1358         acpi_status status;
1359         u32 cap = (unsigned long)data;
1360
1361         if (rfkill_inited) {
1362                 status = set_u32(!blocked, cap);
1363                 if (ACPI_FAILURE(status))
1364                         return -ENODEV;
1365         }
1366
1367         return 0;
1368 }
1369
1370 static const struct rfkill_ops acer_rfkill_ops = {
1371         .set_block = acer_rfkill_set,
1372 };
1373
1374 static struct rfkill *acer_rfkill_register(struct device *dev,
1375                                            enum rfkill_type type,
1376                                            char *name, u32 cap)
1377 {
1378         int err;
1379         struct rfkill *rfkill_dev;
1380         u32 state;
1381         acpi_status status;
1382
1383         rfkill_dev = rfkill_alloc(name, dev, type,
1384                                   &acer_rfkill_ops,
1385                                   (void *)(unsigned long)cap);
1386         if (!rfkill_dev)
1387                 return ERR_PTR(-ENOMEM);
1388
1389         status = get_u32(&state, cap);
1390
1391         err = rfkill_register(rfkill_dev);
1392         if (err) {
1393                 rfkill_destroy(rfkill_dev);
1394                 return ERR_PTR(err);
1395         }
1396
1397         if (ACPI_SUCCESS(status))
1398                 rfkill_set_sw_state(rfkill_dev, !state);
1399
1400         return rfkill_dev;
1401 }
1402
1403 static int acer_rfkill_init(struct device *dev)
1404 {
1405         int err;
1406
1407         if (has_cap(ACER_CAP_WIRELESS)) {
1408                 wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1409                         "acer-wireless", ACER_CAP_WIRELESS);
1410                 if (IS_ERR(wireless_rfkill)) {
1411                         err = PTR_ERR(wireless_rfkill);
1412                         goto error_wireless;
1413                 }
1414         }
1415
1416         if (has_cap(ACER_CAP_BLUETOOTH)) {
1417                 bluetooth_rfkill = acer_rfkill_register(dev,
1418                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1419                         ACER_CAP_BLUETOOTH);
1420                 if (IS_ERR(bluetooth_rfkill)) {
1421                         err = PTR_ERR(bluetooth_rfkill);
1422                         goto error_bluetooth;
1423                 }
1424         }
1425
1426         if (has_cap(ACER_CAP_THREEG)) {
1427                 threeg_rfkill = acer_rfkill_register(dev,
1428                         RFKILL_TYPE_WWAN, "acer-threeg",
1429                         ACER_CAP_THREEG);
1430                 if (IS_ERR(threeg_rfkill)) {
1431                         err = PTR_ERR(threeg_rfkill);
1432                         goto error_threeg;
1433                 }
1434         }
1435
1436         rfkill_inited = true;
1437
1438         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1439             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1440                 schedule_delayed_work(&acer_rfkill_work,
1441                         round_jiffies_relative(HZ));
1442
1443         return 0;
1444
1445 error_threeg:
1446         if (has_cap(ACER_CAP_BLUETOOTH)) {
1447                 rfkill_unregister(bluetooth_rfkill);
1448                 rfkill_destroy(bluetooth_rfkill);
1449         }
1450 error_bluetooth:
1451         if (has_cap(ACER_CAP_WIRELESS)) {
1452                 rfkill_unregister(wireless_rfkill);
1453                 rfkill_destroy(wireless_rfkill);
1454         }
1455 error_wireless:
1456         return err;
1457 }
1458
1459 static void acer_rfkill_exit(void)
1460 {
1461         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1462             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1463                 cancel_delayed_work_sync(&acer_rfkill_work);
1464
1465         if (has_cap(ACER_CAP_WIRELESS)) {
1466                 rfkill_unregister(wireless_rfkill);
1467                 rfkill_destroy(wireless_rfkill);
1468         }
1469
1470         if (has_cap(ACER_CAP_BLUETOOTH)) {
1471                 rfkill_unregister(bluetooth_rfkill);
1472                 rfkill_destroy(bluetooth_rfkill);
1473         }
1474
1475         if (has_cap(ACER_CAP_THREEG)) {
1476                 rfkill_unregister(threeg_rfkill);
1477                 rfkill_destroy(threeg_rfkill);
1478         }
1479         return;
1480 }
1481
1482 /*
1483  * sysfs interface
1484  */
1485 static ssize_t show_bool_threeg(struct device *dev,
1486         struct device_attribute *attr, char *buf)
1487 {
1488         u32 result; \
1489         acpi_status status;
1490
1491         pr_info("This threeg sysfs will be removed in 2012 - used by: %s\n",
1492                 current->comm);
1493         status = get_u32(&result, ACER_CAP_THREEG);
1494         if (ACPI_SUCCESS(status))
1495                 return sprintf(buf, "%u\n", result);
1496         return sprintf(buf, "Read error\n");
1497 }
1498
1499 static ssize_t set_bool_threeg(struct device *dev,
1500         struct device_attribute *attr, const char *buf, size_t count)
1501 {
1502         u32 tmp = simple_strtoul(buf, NULL, 10);
1503         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1504         pr_info("This threeg sysfs will be removed in 2012 - used by: %s\n",
1505                 current->comm);
1506         if (ACPI_FAILURE(status))
1507                 return -EINVAL;
1508         return count;
1509 }
1510 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1511         set_bool_threeg);
1512
1513 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1514         char *buf)
1515 {
1516         pr_info("This interface sysfs will be removed in 2012 - used by: %s\n",
1517                 current->comm);
1518         switch (interface->type) {
1519         case ACER_AMW0:
1520                 return sprintf(buf, "AMW0\n");
1521         case ACER_AMW0_V2:
1522                 return sprintf(buf, "AMW0 v2\n");
1523         case ACER_WMID:
1524                 return sprintf(buf, "WMID\n");
1525         case ACER_WMID_v2:
1526                 return sprintf(buf, "WMID v2\n");
1527         default:
1528                 return sprintf(buf, "Error!\n");
1529         }
1530 }
1531
1532 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1533
1534 static void acer_wmi_notify(u32 value, void *context)
1535 {
1536         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1537         union acpi_object *obj;
1538         struct event_return_value return_value;
1539         acpi_status status;
1540         u16 device_state;
1541         const struct key_entry *key;
1542
1543         status = wmi_get_event_data(value, &response);
1544         if (status != AE_OK) {
1545                 pr_warn("bad event status 0x%x\n", status);
1546                 return;
1547         }
1548
1549         obj = (union acpi_object *)response.pointer;
1550
1551         if (!obj)
1552                 return;
1553         if (obj->type != ACPI_TYPE_BUFFER) {
1554                 pr_warn("Unknown response received %d\n", obj->type);
1555                 kfree(obj);
1556                 return;
1557         }
1558         if (obj->buffer.length != 8) {
1559                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1560                 kfree(obj);
1561                 return;
1562         }
1563
1564         return_value = *((struct event_return_value *)obj->buffer.pointer);
1565         kfree(obj);
1566
1567         switch (return_value.function) {
1568         case WMID_HOTKEY_EVENT:
1569                 device_state = return_value.device_state;
1570                 pr_debug("device state: 0x%x\n", device_state);
1571
1572                 key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1573                                                         return_value.key_num);
1574                 if (!key) {
1575                         pr_warn("Unknown key number - 0x%x\n",
1576                                 return_value.key_num);
1577                 } else {
1578                         switch (key->keycode) {
1579                         case KEY_WLAN:
1580                         case KEY_BLUETOOTH:
1581                                 if (has_cap(ACER_CAP_WIRELESS))
1582                                         rfkill_set_sw_state(wireless_rfkill,
1583                                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1584                                 if (has_cap(ACER_CAP_THREEG))
1585                                         rfkill_set_sw_state(threeg_rfkill,
1586                                                 !(device_state & ACER_WMID3_GDS_THREEG));
1587                                 if (has_cap(ACER_CAP_BLUETOOTH))
1588                                         rfkill_set_sw_state(bluetooth_rfkill,
1589                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1590                                 break;
1591                         }
1592                         sparse_keymap_report_entry(acer_wmi_input_dev, key,
1593                                                    1, true);
1594                 }
1595                 break;
1596         default:
1597                 pr_warn("Unknown function number - %d - %d\n",
1598                         return_value.function, return_value.key_num);
1599                 break;
1600         }
1601 }
1602
1603 static acpi_status
1604 wmid3_set_lm_mode(struct lm_input_params *params,
1605                   struct lm_return_value *return_value)
1606 {
1607         acpi_status status;
1608         union acpi_object *obj;
1609
1610         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1611         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1612
1613         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1614         if (ACPI_FAILURE(status))
1615                 return status;
1616
1617         obj = output.pointer;
1618
1619         if (!obj)
1620                 return AE_ERROR;
1621         else if (obj->type != ACPI_TYPE_BUFFER) {
1622                 kfree(obj);
1623                 return AE_ERROR;
1624         }
1625         if (obj->buffer.length != 4) {
1626                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1627                 kfree(obj);
1628                 return AE_ERROR;
1629         }
1630
1631         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1632         kfree(obj);
1633
1634         return status;
1635 }
1636
1637 static int acer_wmi_enable_ec_raw(void)
1638 {
1639         struct lm_return_value return_value;
1640         acpi_status status;
1641         struct lm_input_params params = {
1642                 .function_num = 0x1,
1643                 .commun_devices = 0xFFFF,
1644                 .devices = 0xFFFF,
1645                 .lm_status = 0x00,            /* Launch Manager Deactive */
1646         };
1647
1648         status = wmid3_set_lm_mode(&params, &return_value);
1649
1650         if (return_value.error_code || return_value.ec_return_value)
1651                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1652                         return_value.error_code,
1653                         return_value.ec_return_value);
1654         else
1655                 pr_info("Enabled EC raw mode\n");
1656
1657         return status;
1658 }
1659
1660 static int acer_wmi_enable_lm(void)
1661 {
1662         struct lm_return_value return_value;
1663         acpi_status status;
1664         struct lm_input_params params = {
1665                 .function_num = 0x1,
1666                 .commun_devices = 0xFFFF,
1667                 .devices = 0xFFFF,
1668                 .lm_status = 0x01,            /* Launch Manager Active */
1669         };
1670
1671         status = wmid3_set_lm_mode(&params, &return_value);
1672
1673         if (return_value.error_code || return_value.ec_return_value)
1674                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1675                         return_value.error_code,
1676                         return_value.ec_return_value);
1677
1678         return status;
1679 }
1680
1681 static int __init acer_wmi_input_setup(void)
1682 {
1683         acpi_status status;
1684         int err;
1685
1686         acer_wmi_input_dev = input_allocate_device();
1687         if (!acer_wmi_input_dev)
1688                 return -ENOMEM;
1689
1690         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1691         acer_wmi_input_dev->phys = "wmi/input0";
1692         acer_wmi_input_dev->id.bustype = BUS_HOST;
1693
1694         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1695         if (err)
1696                 goto err_free_dev;
1697
1698         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1699                                                 acer_wmi_notify, NULL);
1700         if (ACPI_FAILURE(status)) {
1701                 err = -EIO;
1702                 goto err_free_keymap;
1703         }
1704
1705         err = input_register_device(acer_wmi_input_dev);
1706         if (err)
1707                 goto err_uninstall_notifier;
1708
1709         return 0;
1710
1711 err_uninstall_notifier:
1712         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1713 err_free_keymap:
1714         sparse_keymap_free(acer_wmi_input_dev);
1715 err_free_dev:
1716         input_free_device(acer_wmi_input_dev);
1717         return err;
1718 }
1719
1720 static void acer_wmi_input_destroy(void)
1721 {
1722         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1723         sparse_keymap_free(acer_wmi_input_dev);
1724         input_unregister_device(acer_wmi_input_dev);
1725 }
1726
1727 /*
1728  * debugfs functions
1729  */
1730 static u32 get_wmid_devices(void)
1731 {
1732         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1733         union acpi_object *obj;
1734         acpi_status status;
1735         u32 devices = 0;
1736
1737         status = wmi_query_block(WMID_GUID2, 1, &out);
1738         if (ACPI_FAILURE(status))
1739                 return 0;
1740
1741         obj = (union acpi_object *) out.pointer;
1742         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1743                 (obj->buffer.length == sizeof(u32) ||
1744                 obj->buffer.length == sizeof(u64))) {
1745                 devices = *((u32 *) obj->buffer.pointer);
1746         } else if (obj->type == ACPI_TYPE_INTEGER) {
1747                 devices = (u32) obj->integer.value;
1748         }
1749
1750         kfree(out.pointer);
1751         return devices;
1752 }
1753
1754 /*
1755  * Platform device
1756  */
1757 static int __devinit acer_platform_probe(struct platform_device *device)
1758 {
1759         int err;
1760
1761         if (has_cap(ACER_CAP_MAILLED)) {
1762                 err = acer_led_init(&device->dev);
1763                 if (err)
1764                         goto error_mailled;
1765         }
1766
1767         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1768                 err = acer_backlight_init(&device->dev);
1769                 if (err)
1770                         goto error_brightness;
1771         }
1772
1773         err = acer_rfkill_init(&device->dev);
1774         if (err)
1775                 goto error_rfkill;
1776
1777         return err;
1778
1779 error_rfkill:
1780         if (has_cap(ACER_CAP_BRIGHTNESS))
1781                 acer_backlight_exit();
1782 error_brightness:
1783         if (has_cap(ACER_CAP_MAILLED))
1784                 acer_led_exit();
1785 error_mailled:
1786         return err;
1787 }
1788
1789 static int acer_platform_remove(struct platform_device *device)
1790 {
1791         if (has_cap(ACER_CAP_MAILLED))
1792                 acer_led_exit();
1793         if (has_cap(ACER_CAP_BRIGHTNESS))
1794                 acer_backlight_exit();
1795
1796         acer_rfkill_exit();
1797         return 0;
1798 }
1799
1800 static int acer_platform_suspend(struct platform_device *dev,
1801 pm_message_t state)
1802 {
1803         u32 value;
1804         struct acer_data *data = &interface->data;
1805
1806         if (!data)
1807                 return -ENOMEM;
1808
1809         if (has_cap(ACER_CAP_MAILLED)) {
1810                 get_u32(&value, ACER_CAP_MAILLED);
1811                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1812                 data->mailled = value;
1813         }
1814
1815         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1816                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1817                 data->brightness = value;
1818         }
1819
1820         return 0;
1821 }
1822
1823 static int acer_platform_resume(struct platform_device *device)
1824 {
1825         struct acer_data *data = &interface->data;
1826
1827         if (!data)
1828                 return -ENOMEM;
1829
1830         if (has_cap(ACER_CAP_MAILLED))
1831                 set_u32(data->mailled, ACER_CAP_MAILLED);
1832
1833         if (has_cap(ACER_CAP_BRIGHTNESS))
1834                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1835
1836         return 0;
1837 }
1838
1839 static void acer_platform_shutdown(struct platform_device *device)
1840 {
1841         struct acer_data *data = &interface->data;
1842
1843         if (!data)
1844                 return;
1845
1846         if (has_cap(ACER_CAP_MAILLED))
1847                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1848 }
1849
1850 static struct platform_driver acer_platform_driver = {
1851         .driver = {
1852                 .name = "acer-wmi",
1853                 .owner = THIS_MODULE,
1854         },
1855         .probe = acer_platform_probe,
1856         .remove = acer_platform_remove,
1857         .suspend = acer_platform_suspend,
1858         .resume = acer_platform_resume,
1859         .shutdown = acer_platform_shutdown,
1860 };
1861
1862 static struct platform_device *acer_platform_device;
1863
1864 static int remove_sysfs(struct platform_device *device)
1865 {
1866         if (has_cap(ACER_CAP_THREEG))
1867                 device_remove_file(&device->dev, &dev_attr_threeg);
1868
1869         device_remove_file(&device->dev, &dev_attr_interface);
1870
1871         return 0;
1872 }
1873
1874 static int create_sysfs(void)
1875 {
1876         int retval = -ENOMEM;
1877
1878         if (has_cap(ACER_CAP_THREEG)) {
1879                 retval = device_create_file(&acer_platform_device->dev,
1880                         &dev_attr_threeg);
1881                 if (retval)
1882                         goto error_sysfs;
1883         }
1884
1885         retval = device_create_file(&acer_platform_device->dev,
1886                 &dev_attr_interface);
1887         if (retval)
1888                 goto error_sysfs;
1889
1890         return 0;
1891
1892 error_sysfs:
1893                 remove_sysfs(acer_platform_device);
1894         return retval;
1895 }
1896
1897 static void remove_debugfs(void)
1898 {
1899         debugfs_remove(interface->debug.devices);
1900         debugfs_remove(interface->debug.root);
1901 }
1902
1903 static int create_debugfs(void)
1904 {
1905         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1906         if (!interface->debug.root) {
1907                 pr_err("Failed to create debugfs directory");
1908                 return -ENOMEM;
1909         }
1910
1911         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1912                                         interface->debug.root,
1913                                         &interface->debug.wmid_devices);
1914         if (!interface->debug.devices)
1915                 goto error_debugfs;
1916
1917         return 0;
1918
1919 error_debugfs:
1920         remove_debugfs();
1921         return -ENOMEM;
1922 }
1923
1924 static int __init acer_wmi_init(void)
1925 {
1926         int err;
1927
1928         pr_info("Acer Laptop ACPI-WMI Extras\n");
1929
1930         if (dmi_check_system(acer_blacklist)) {
1931                 pr_info("Blacklisted hardware detected - not loading\n");
1932                 return -ENODEV;
1933         }
1934
1935         find_quirks();
1936
1937         /*
1938          * Detect which ACPI-WMI interface we're using.
1939          */
1940         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1941                 interface = &AMW0_V2_interface;
1942
1943         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1944                 interface = &wmid_interface;
1945
1946         if (wmi_has_guid(WMID_GUID3))
1947                 interface = &wmid_v2_interface;
1948
1949         if (interface)
1950                 dmi_walk(type_aa_dmi_decode, NULL);
1951
1952         if (wmi_has_guid(WMID_GUID2) && interface) {
1953                 if (!has_type_aa && ACPI_FAILURE(WMID_set_capabilities())) {
1954                         pr_err("Unable to detect available WMID devices\n");
1955                         return -ENODEV;
1956                 }
1957                 /* WMID always provides brightness methods */
1958                 interface->capability |= ACER_CAP_BRIGHTNESS;
1959         } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
1960                 pr_err("No WMID device detection method found\n");
1961                 return -ENODEV;
1962         }
1963
1964         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1965                 interface = &AMW0_interface;
1966
1967                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1968                         pr_err("Unable to detect available AMW0 devices\n");
1969                         return -ENODEV;
1970                 }
1971         }
1972
1973         if (wmi_has_guid(AMW0_GUID1))
1974                 AMW0_find_mailled();
1975
1976         if (!interface) {
1977                 pr_err("No or unsupported WMI interface, unable to load\n");
1978                 return -ENODEV;
1979         }
1980
1981         set_quirks();
1982
1983         if (acpi_video_backlight_support()) {
1984                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1985                 pr_info("Brightness must be controlled by generic video driver\n");
1986         }
1987
1988         if (wmi_has_guid(WMID_GUID3)) {
1989                 if (ec_raw_mode) {
1990                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
1991                                 pr_err("Cannot enable EC raw mode\n");
1992                                 return -ENODEV;
1993                         }
1994                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
1995                         pr_err("Cannot enable Launch Manager mode\n");
1996                         return -ENODEV;
1997                 }
1998         } else if (ec_raw_mode) {
1999                 pr_info("No WMID EC raw mode enable method\n");
2000         }
2001
2002         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
2003                 err = acer_wmi_input_setup();
2004                 if (err)
2005                         return err;
2006         }
2007
2008         err = platform_driver_register(&acer_platform_driver);
2009         if (err) {
2010                 pr_err("Unable to register platform driver\n");
2011                 goto error_platform_register;
2012         }
2013
2014         acer_platform_device = platform_device_alloc("acer-wmi", -1);
2015         if (!acer_platform_device) {
2016                 err = -ENOMEM;
2017                 goto error_device_alloc;
2018         }
2019
2020         err = platform_device_add(acer_platform_device);
2021         if (err)
2022                 goto error_device_add;
2023
2024         err = create_sysfs();
2025         if (err)
2026                 goto error_create_sys;
2027
2028         if (wmi_has_guid(WMID_GUID2)) {
2029                 interface->debug.wmid_devices = get_wmid_devices();
2030                 err = create_debugfs();
2031                 if (err)
2032                         goto error_create_debugfs;
2033         }
2034
2035         /* Override any initial settings with values from the commandline */
2036         acer_commandline_init();
2037
2038         return 0;
2039
2040 error_create_debugfs:
2041         remove_sysfs(acer_platform_device);
2042 error_create_sys:
2043         platform_device_del(acer_platform_device);
2044 error_device_add:
2045         platform_device_put(acer_platform_device);
2046 error_device_alloc:
2047         platform_driver_unregister(&acer_platform_driver);
2048 error_platform_register:
2049         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2050                 acer_wmi_input_destroy();
2051
2052         return err;
2053 }
2054
2055 static void __exit acer_wmi_exit(void)
2056 {
2057         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2058                 acer_wmi_input_destroy();
2059
2060         remove_sysfs(acer_platform_device);
2061         remove_debugfs();
2062         platform_device_unregister(acer_platform_device);
2063         platform_driver_unregister(&acer_platform_driver);
2064
2065         pr_info("Acer Laptop WMI Extras unloaded\n");
2066         return;
2067 }
2068
2069 module_init(acer_wmi_init);
2070 module_exit(acer_wmi_exit);