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 acpi_status AMW0_set_capabilities(void)
 683 {
 684         struct wmab_args args;
 685         struct wmab_ret ret;
 686         acpi_status status;
 687         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 688         union acpi_object *obj;
 689
 690         /*
 691          * On laptops with this strange GUID (non Acer), normal probing doesn't
 692          * work.
 693          */
 694         if (wmi_has_guid(AMW0_GUID2)) {
 695                 interface->capability |= ACER_CAP_WIRELESS;
 696                 return AE_OK;
 697         }
 698
 699         args.eax = ACER_AMW0_WRITE;
 700         args.ecx = args.edx = 0;
 701
 702         args.ebx = 0xa2 << 8;
 703         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 704
 705         status = wmab_execute(&args, &out);
 706         if (ACPI_FAILURE(status))
 707                 return status;
 708
 709         obj = out.pointer;
 710         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 711         obj->buffer.length == sizeof(struct wmab_ret)) {
 712                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 713         } else {
 714                 status = AE_ERROR;
 715                 goto out;
 716         }
 717
 718         if (ret.eax & 0x1)
 719                 interface->capability |= ACER_CAP_WIRELESS;
 720
 721         args.ebx = 2 << 8;
 722         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 723
 724         /*
 725          * It's ok to use existing buffer for next wmab_execute call.
 726          * But we need to kfree(out.pointer) if next wmab_execute fail.
 727          */
 728         status = wmab_execute(&args, &out);
 729         if (ACPI_FAILURE(status))
 730                 goto out;
 731
 732         obj = (union acpi_object *) out.pointer;
 733         if (obj && obj->type == ACPI_TYPE_BUFFER
 734         && obj->buffer.length == sizeof(struct wmab_ret)) {
 735                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 736         } else {
 737                 status = AE_ERROR;
 738                 goto out;
 739         }
 740
 741         if (ret.eax & 0x1)
 742                 interface->capability |= ACER_CAP_BLUETOOTH;
 743
 744         /*
 745          * This appears to be safe to enable, since all Wistron based laptops
 746          * appear to use the same EC register for brightness, even if they
 747          * differ for wireless, etc
 748          */
 749         if (quirks->brightness >= 0)
 750                 interface->capability |= ACER_CAP_BRIGHTNESS;
 751
 752         status = AE_OK;
 753 out:
 754         kfree(out.pointer);
 755         return status;
 756 }
 757
 758 static struct wmi_interface AMW0_interface = {
 759         .type = ACER_AMW0,
 760 };
 761
 762 static struct wmi_interface AMW0_V2_interface = {
 763         .type = ACER_AMW0_V2,
 764 };
 765
 766 /*
 767  * New interface (The WMID interface)
 768  */
 769 static acpi_status
 770 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 771 {
 772         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 773         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 774         union acpi_object *obj;
 775         u32 tmp;
 776         acpi_status status;
 777
 778         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 779
 780         if (ACPI_FAILURE(status))
 781                 return status;
 782
 783         obj = (union acpi_object *) result.pointer;
 784         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 785                 (obj->buffer.length == sizeof(u32) ||
 786                 obj->buffer.length == sizeof(u64))) {
 787                 tmp = *((u32 *) obj->buffer.pointer);
 788         } else if (obj->type == ACPI_TYPE_INTEGER) {
 789                 tmp = (u32) obj->integer.value;
 790         } else {
 791                 tmp = 0;
 792         }
 793
 794         if (out)
 795                 *out = tmp;
 796
 797         kfree(result.pointer);
 798
 799         return status;
 800 }
 801
 802 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 803 struct wmi_interface *iface)
 804 {
 805         acpi_status status;
 806         u8 tmp;
 807         u32 result, method_id = 0;
 808
 809         switch (cap) {
 810         case ACER_CAP_WIRELESS:
 811                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 812                 break;
 813         case ACER_CAP_BLUETOOTH:
 814                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 815                 break;
 816         case ACER_CAP_BRIGHTNESS:
 817                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 818                 break;
 819         case ACER_CAP_THREEG:
 820                 method_id = ACER_WMID_GET_THREEG_METHODID;
 821                 break;
 822         case ACER_CAP_MAILLED:
 823                 if (quirks->mailled == 1) {
 824                         ec_read(0x9f, &tmp);
 825                         *value = tmp & 0x1;
 826                         return 0;
 827                 }
 828         default:
 829                 return AE_ERROR;
 830         }
 831         status = WMI_execute_u32(method_id, 0, &result);
 832
 833         if (ACPI_SUCCESS(status))
 834                 *value = (u8)result;
 835
 836         return status;
 837 }
 838
 839 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 840 {
 841         u32 method_id = 0;
 842         char param;
 843
 844         switch (cap) {
 845         case ACER_CAP_BRIGHTNESS:
 846                 if (value > max_brightness)
 847                         return AE_BAD_PARAMETER;
 848                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 849                 break;
 850         case ACER_CAP_WIRELESS:
 851                 if (value > 1)
 852                         return AE_BAD_PARAMETER;
 853                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 854                 break;
 855         case ACER_CAP_BLUETOOTH:
 856                 if (value > 1)
 857                         return AE_BAD_PARAMETER;
 858                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 859                 break;
 860         case ACER_CAP_THREEG:
 861                 if (value > 1)
 862                         return AE_BAD_PARAMETER;
 863                 method_id = ACER_WMID_SET_THREEG_METHODID;
 864                 break;
 865         case ACER_CAP_MAILLED:
 866                 if (value > 1)
 867                         return AE_BAD_PARAMETER;
 868                 if (quirks->mailled == 1) {
 869                         param = value ? 0x92 : 0x93;
 870                         i8042_lock_chip();
 871                         i8042_command(&param, 0x1059);
 872                         i8042_unlock_chip();
 873                         return 0;
 874                 }
 875                 break;
 876         default:
 877                 return AE_ERROR;
 878         }
 879         return WMI_execute_u32(method_id, (u32)value, NULL);
 880 }
 881
 882 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
 883 {
 884         struct wmid3_gds_return_value return_value;
 885         acpi_status status;
 886         union acpi_object *obj;
 887         struct wmid3_gds_input_param params = {
 888                 .function_num = 0x1,
 889                 .hotkey_number = 0x01,
 890                 .devices = device,
 891         };
 892         struct acpi_buffer input = {
 893                 sizeof(struct wmid3_gds_input_param),
 894                 &params
 895         };
 896         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 897
 898         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
 899         if (ACPI_FAILURE(status))
 900                 return status;
 901
 902         obj = output.pointer;
 903
 904         if (!obj)
 905                 return AE_ERROR;
 906         else if (obj->type != ACPI_TYPE_BUFFER) {
 907                 kfree(obj);
 908                 return AE_ERROR;
 909         }
 910         if (obj->buffer.length != 8) {
 911                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
 912                 kfree(obj);
 913                 return AE_ERROR;
 914         }
 915
 916         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
 917         kfree(obj);
 918
 919         if (return_value.error_code || return_value.ec_return_value)
 920                 pr_warn("Get 0x%x Device Status failed: 0x%x - 0x%x\n",
 921                         device,
 922                         return_value.error_code,
 923                         return_value.ec_return_value);
 924         else
 925                 *value = !!(return_value.devices & device);
 926
 927         return status;
 928 }
 929
 930 static acpi_status wmid_v2_get_u32(u32 *value, u32 cap)
 931 {
 932         u16 device;
 933
 934         switch (cap) {
 935         case ACER_CAP_WIRELESS:
 936                 device = ACER_WMID3_GDS_WIRELESS;
 937                 break;
 938         case ACER_CAP_BLUETOOTH:
 939                 device = ACER_WMID3_GDS_BLUETOOTH;
 940                 break;
 941         case ACER_CAP_THREEG:
 942                 device = ACER_WMID3_GDS_THREEG;
 943                 break;
 944         default:
 945                 return AE_ERROR;
 946         }
 947         return wmid3_get_device_status(value, device);
 948 }
 949
 950 static acpi_status wmid3_set_device_status(u32 value, u16 device)
 951 {
 952         struct wmid3_gds_return_value return_value;
 953         acpi_status status;
 954         union acpi_object *obj;
 955         u16 devices;
 956         struct wmid3_gds_input_param params = {
 957                 .function_num = 0x1,
 958                 .hotkey_number = 0x01,
 959                 .devices = commun_func_bitmap,
 960         };
 961         struct acpi_buffer input = {
 962                 sizeof(struct wmid3_gds_input_param),
 963                 &params
 964         };
 965         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 966         struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
 967
 968         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
 969         if (ACPI_FAILURE(status))
 970                 return status;
 971
 972         obj = output.pointer;
 973
 974         if (!obj)
 975                 return AE_ERROR;
 976         else if (obj->type != ACPI_TYPE_BUFFER) {
 977                 kfree(obj);
 978                 return AE_ERROR;
 979         }
 980         if (obj->buffer.length != 8) {
 981                 pr_warning("Unknown buffer length %d\n", obj->buffer.length);
 982                 kfree(obj);
 983                 return AE_ERROR;
 984         }
 985
 986         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
 987         kfree(obj);
 988
 989         if (return_value.error_code || return_value.ec_return_value) {
 990                 pr_warning("Get Current Device Status failed: "
 991                         "0x%x - 0x%x\n", return_value.error_code,
 992                         return_value.ec_return_value);
 993                 return status;
 994         }
 995
 996         devices = return_value.devices;
 997         params.function_num = 0x2;
 998         params.hotkey_number = 0x01;
 999         params.devices = (value) ? (devices | device) : (devices & ~device);
1000
1001         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output2);
1002         if (ACPI_FAILURE(status))
1003                 return status;
1004
1005         obj = output2.pointer;
1006
1007         if (!obj)
1008                 return AE_ERROR;
1009         else if (obj->type != ACPI_TYPE_BUFFER) {
1010                 kfree(obj);
1011                 return AE_ERROR;
1012         }
1013         if (obj->buffer.length != 4) {
1014                 pr_warning("Unknown buffer length %d\n", obj->buffer.length);
1015                 kfree(obj);
1016                 return AE_ERROR;
1017         }
1018
1019         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1020         kfree(obj);
1021
1022         if (return_value.error_code || return_value.ec_return_value)
1023                 pr_warning("Set Device Status failed: "
1024                         "0x%x - 0x%x\n", return_value.error_code,
1025                         return_value.ec_return_value);
1026
1027         return status;
1028 }
1029
1030 static acpi_status wmid_v2_set_u32(u32 value, u32 cap)
1031 {
1032         u16 device;
1033
1034         switch (cap) {
1035         case ACER_CAP_WIRELESS:
1036                 device = ACER_WMID3_GDS_WIRELESS;
1037                 break;
1038         case ACER_CAP_BLUETOOTH:
1039                 device = ACER_WMID3_GDS_BLUETOOTH;
1040                 break;
1041         case ACER_CAP_THREEG:
1042                 device = ACER_WMID3_GDS_THREEG;
1043                 break;
1044         default:
1045                 return AE_ERROR;
1046         }
1047         return wmid3_set_device_status(value, device);
1048 }
1049
1050 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
1051 {
1052         struct hotkey_function_type_aa *type_aa;
1053
1054         /* We are looking for OEM-specific Type AAh */
1055         if (header->type != 0xAA)
1056                 return;
1057
1058         has_type_aa = true;
1059         type_aa = (struct hotkey_function_type_aa *) header;
1060
1061         pr_info("Function bitmap for Communication Button: 0x%x\n",
1062                 type_aa->commun_func_bitmap);
1063         commun_func_bitmap = type_aa->commun_func_bitmap;
1064
1065         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
1066                 interface->capability |= ACER_CAP_WIRELESS;
1067         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
1068                 interface->capability |= ACER_CAP_THREEG;
1069         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
1070                 interface->capability |= ACER_CAP_BLUETOOTH;
1071 }
1072
1073 static acpi_status WMID_set_capabilities(void)
1074 {
1075         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1076         union acpi_object *obj;
1077         acpi_status status;
1078         u32 devices;
1079
1080         status = wmi_query_block(WMID_GUID2, 1, &out);
1081         if (ACPI_FAILURE(status))
1082                 return status;
1083
1084         obj = (union acpi_object *) out.pointer;
1085         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1086                 (obj->buffer.length == sizeof(u32) ||
1087                 obj->buffer.length == sizeof(u64))) {
1088                 devices = *((u32 *) obj->buffer.pointer);
1089         } else if (obj->type == ACPI_TYPE_INTEGER) {
1090                 devices = (u32) obj->integer.value;
1091         } else {
1092                 kfree(out.pointer);
1093                 return AE_ERROR;
1094         }
1095
1096         pr_info("Function bitmap for Communication Device: 0x%x\n", devices);
1097         if (devices & 0x07)
1098                 interface->capability |= ACER_CAP_WIRELESS;
1099         if (devices & 0x40)
1100                 interface->capability |= ACER_CAP_THREEG;
1101         if (devices & 0x10)
1102                 interface->capability |= ACER_CAP_BLUETOOTH;
1103
1104         if (!(devices & 0x20))
1105                 max_brightness = 0x9;
1106
1107         kfree(out.pointer);
1108         return status;
1109 }
1110
1111 static struct wmi_interface wmid_interface = {
1112         .type = ACER_WMID,
1113 };
1114
1115 static struct wmi_interface wmid_v2_interface = {
1116         .type = ACER_WMID_v2,
1117 };
1118
1119 /*
1120  * Generic Device (interface-independent)
1121  */
1122
1123 static acpi_status get_u32(u32 *value, u32 cap)
1124 {
1125         acpi_status status = AE_ERROR;
1126
1127         switch (interface->type) {
1128         case ACER_AMW0:
1129                 status = AMW0_get_u32(value, cap, interface);
1130                 break;
1131         case ACER_AMW0_V2:
1132                 if (cap == ACER_CAP_MAILLED) {
1133                         status = AMW0_get_u32(value, cap, interface);
1134                         break;
1135                 }
1136         case ACER_WMID:
1137                 status = WMID_get_u32(value, cap, interface);
1138                 break;
1139         case ACER_WMID_v2:
1140                 if (cap & (ACER_CAP_WIRELESS |
1141                            ACER_CAP_BLUETOOTH |
1142                            ACER_CAP_THREEG))
1143                         status = wmid_v2_get_u32(value, cap);
1144                 else if (wmi_has_guid(WMID_GUID2))
1145                         status = WMID_get_u32(value, cap, interface);
1146                 break;
1147         }
1148
1149         return status;
1150 }
1151
1152 static acpi_status set_u32(u32 value, u32 cap)
1153 {
1154         acpi_status status;
1155
1156         if (interface->capability & cap) {
1157                 switch (interface->type) {
1158                 case ACER_AMW0:
1159                         return AMW0_set_u32(value, cap, interface);
1160                 case ACER_AMW0_V2:
1161                         if (cap == ACER_CAP_MAILLED)
1162                                 return AMW0_set_u32(value, cap, interface);
1163
1164                         /*
1165                          * On some models, some WMID methods don't toggle
1166                          * properly. For those cases, we want to run the AMW0
1167                          * method afterwards to be certain we've really toggled
1168                          * the device state.
1169                          */
1170                         if (cap == ACER_CAP_WIRELESS ||
1171                                 cap == ACER_CAP_BLUETOOTH) {
1172                                 status = WMID_set_u32(value, cap, interface);
1173                                 if (ACPI_FAILURE(status))
1174                                         return status;
1175
1176                                 return AMW0_set_u32(value, cap, interface);
1177                         }
1178                 case ACER_WMID:
1179                         return WMID_set_u32(value, cap, interface);
1180                 case ACER_WMID_v2:
1181                         if (cap & (ACER_CAP_WIRELESS |
1182                                    ACER_CAP_BLUETOOTH |
1183                                    ACER_CAP_THREEG))
1184                                 return wmid_v2_set_u32(value, cap);
1185                         else if (wmi_has_guid(WMID_GUID2))
1186                                 return WMID_set_u32(value, cap, interface);
1187                 default:
1188                         return AE_BAD_PARAMETER;
1189                 }
1190         }
1191         return AE_BAD_PARAMETER;
1192 }
1193
1194 static void __init acer_commandline_init(void)
1195 {
1196         /*
1197          * These will all fail silently if the value given is invalid, or the
1198          * capability isn't available on the given interface
1199          */
1200         if (mailled >= 0)
1201                 set_u32(mailled, ACER_CAP_MAILLED);
1202         if (!has_type_aa && threeg >= 0)
1203                 set_u32(threeg, ACER_CAP_THREEG);
1204         if (brightness >= 0)
1205                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
1206 }
1207
1208 /*
1209  * LED device (Mail LED only, no other LEDs known yet)
1210  */
1211 static void mail_led_set(struct led_classdev *led_cdev,
1212 enum led_brightness value)
1213 {
1214         set_u32(value, ACER_CAP_MAILLED);
1215 }
1216
1217 static struct led_classdev mail_led = {
1218         .name = "acer-wmi::mail",
1219         .brightness_set = mail_led_set,
1220 };
1221
1222 static int __devinit acer_led_init(struct device *dev)
1223 {
1224         return led_classdev_register(dev, &mail_led);
1225 }
1226
1227 static void acer_led_exit(void)
1228 {
1229         set_u32(LED_OFF, ACER_CAP_MAILLED);
1230         led_classdev_unregister(&mail_led);
1231 }
1232
1233 /*
1234  * Backlight device
1235  */
1236 static struct backlight_device *acer_backlight_device;
1237
1238 static int read_brightness(struct backlight_device *bd)
1239 {
1240         u32 value;
1241         get_u32(&value, ACER_CAP_BRIGHTNESS);
1242         return value;
1243 }
1244
1245 static int update_bl_status(struct backlight_device *bd)
1246 {
1247         int intensity = bd->props.brightness;
1248
1249         if (bd->props.power != FB_BLANK_UNBLANK)
1250                 intensity = 0;
1251         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1252                 intensity = 0;
1253
1254         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1255
1256         return 0;
1257 }
1258
1259 static const struct backlight_ops acer_bl_ops = {
1260         .get_brightness = read_brightness,
1261         .update_status = update_bl_status,
1262 };
1263
1264 static int __devinit acer_backlight_init(struct device *dev)
1265 {
1266         struct backlight_properties props;
1267         struct backlight_device *bd;
1268
1269         memset(&props, 0, sizeof(struct backlight_properties));
1270         props.type = BACKLIGHT_PLATFORM;
1271         props.max_brightness = max_brightness;
1272         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1273                                        &props);
1274         if (IS_ERR(bd)) {
1275                 pr_err("Could not register Acer backlight device\n");
1276                 acer_backlight_device = NULL;
1277                 return PTR_ERR(bd);
1278         }
1279
1280         acer_backlight_device = bd;
1281
1282         bd->props.power = FB_BLANK_UNBLANK;
1283         bd->props.brightness = read_brightness(bd);
1284         backlight_update_status(bd);
1285         return 0;
1286 }
1287
1288 static void acer_backlight_exit(void)
1289 {
1290         backlight_device_unregister(acer_backlight_device);
1291 }
1292
1293 /*
1294  * Rfkill devices
1295  */
1296 static void acer_rfkill_update(struct work_struct *ignored);
1297 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1298 static void acer_rfkill_update(struct work_struct *ignored)
1299 {
1300         u32 state;
1301         acpi_status status;
1302
1303         if (has_cap(ACER_CAP_WIRELESS)) {
1304                 status = get_u32(&state, ACER_CAP_WIRELESS);
1305                 if (ACPI_SUCCESS(status)) {
1306                         if (quirks->wireless == 3)
1307                                 rfkill_set_hw_state(wireless_rfkill, !state);
1308                         else
1309                                 rfkill_set_sw_state(wireless_rfkill, !state);
1310                 }
1311         }
1312
1313         if (has_cap(ACER_CAP_BLUETOOTH)) {
1314                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1315                 if (ACPI_SUCCESS(status))
1316                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1317         }
1318
1319         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1320                 status = get_u32(&state, ACER_WMID3_GDS_THREEG);
1321                 if (ACPI_SUCCESS(status))
1322                         rfkill_set_sw_state(threeg_rfkill, !state);
1323         }
1324
1325         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1326 }
1327
1328 static int acer_rfkill_set(void *data, bool blocked)
1329 {
1330         acpi_status status;
1331         u32 cap = (unsigned long)data;
1332
1333         if (rfkill_inited) {
1334                 status = set_u32(!blocked, cap);
1335                 if (ACPI_FAILURE(status))
1336                         return -ENODEV;
1337         }
1338
1339         return 0;
1340 }
1341
1342 static const struct rfkill_ops acer_rfkill_ops = {
1343         .set_block = acer_rfkill_set,
1344 };
1345
1346 static struct rfkill *acer_rfkill_register(struct device *dev,
1347                                            enum rfkill_type type,
1348                                            char *name, u32 cap)
1349 {
1350         int err;
1351         struct rfkill *rfkill_dev;
1352         u32 state;
1353         acpi_status status;
1354
1355         rfkill_dev = rfkill_alloc(name, dev, type,
1356                                   &acer_rfkill_ops,
1357                                   (void *)(unsigned long)cap);
1358         if (!rfkill_dev)
1359                 return ERR_PTR(-ENOMEM);
1360
1361         status = get_u32(&state, cap);
1362
1363         err = rfkill_register(rfkill_dev);
1364         if (err) {
1365                 rfkill_destroy(rfkill_dev);
1366                 return ERR_PTR(err);
1367         }
1368
1369         if (ACPI_SUCCESS(status))
1370                 rfkill_set_sw_state(rfkill_dev, !state);
1371
1372         return rfkill_dev;
1373 }
1374
1375 static int acer_rfkill_init(struct device *dev)
1376 {
1377         int err;
1378
1379         if (has_cap(ACER_CAP_WIRELESS)) {
1380                 wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1381                         "acer-wireless", ACER_CAP_WIRELESS);
1382                 if (IS_ERR(wireless_rfkill)) {
1383                         err = PTR_ERR(wireless_rfkill);
1384                         goto error_wireless;
1385                 }
1386         }
1387
1388         if (has_cap(ACER_CAP_BLUETOOTH)) {
1389                 bluetooth_rfkill = acer_rfkill_register(dev,
1390                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1391                         ACER_CAP_BLUETOOTH);
1392                 if (IS_ERR(bluetooth_rfkill)) {
1393                         err = PTR_ERR(bluetooth_rfkill);
1394                         goto error_bluetooth;
1395                 }
1396         }
1397
1398         if (has_cap(ACER_CAP_THREEG)) {
1399                 threeg_rfkill = acer_rfkill_register(dev,
1400                         RFKILL_TYPE_WWAN, "acer-threeg",
1401                         ACER_CAP_THREEG);
1402                 if (IS_ERR(threeg_rfkill)) {
1403                         err = PTR_ERR(threeg_rfkill);
1404                         goto error_threeg;
1405                 }
1406         }
1407
1408         rfkill_inited = true;
1409
1410         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1411             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1412                 schedule_delayed_work(&acer_rfkill_work,
1413                         round_jiffies_relative(HZ));
1414
1415         return 0;
1416
1417 error_threeg:
1418         if (has_cap(ACER_CAP_BLUETOOTH)) {
1419                 rfkill_unregister(bluetooth_rfkill);
1420                 rfkill_destroy(bluetooth_rfkill);
1421         }
1422 error_bluetooth:
1423         if (has_cap(ACER_CAP_WIRELESS)) {
1424                 rfkill_unregister(wireless_rfkill);
1425                 rfkill_destroy(wireless_rfkill);
1426         }
1427 error_wireless:
1428         return err;
1429 }
1430
1431 static void acer_rfkill_exit(void)
1432 {
1433         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1434             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1435                 cancel_delayed_work_sync(&acer_rfkill_work);
1436
1437         if (has_cap(ACER_CAP_WIRELESS)) {
1438                 rfkill_unregister(wireless_rfkill);
1439                 rfkill_destroy(wireless_rfkill);
1440         }
1441
1442         if (has_cap(ACER_CAP_BLUETOOTH)) {
1443                 rfkill_unregister(bluetooth_rfkill);
1444                 rfkill_destroy(bluetooth_rfkill);
1445         }
1446
1447         if (has_cap(ACER_CAP_THREEG)) {
1448                 rfkill_unregister(threeg_rfkill);
1449                 rfkill_destroy(threeg_rfkill);
1450         }
1451         return;
1452 }
1453
1454 /*
1455  * sysfs interface
1456  */
1457 static ssize_t show_bool_threeg(struct device *dev,
1458         struct device_attribute *attr, char *buf)
1459 {
1460         u32 result; \
1461         acpi_status status;
1462
1463         pr_info("This threeg sysfs will be removed in 2012"
1464                 " - used by: %s\n", current->comm);
1465         status = get_u32(&result, ACER_CAP_THREEG);
1466         if (ACPI_SUCCESS(status))
1467                 return sprintf(buf, "%u\n", result);
1468         return sprintf(buf, "Read error\n");
1469 }
1470
1471 static ssize_t set_bool_threeg(struct device *dev,
1472         struct device_attribute *attr, const char *buf, size_t count)
1473 {
1474         u32 tmp = simple_strtoul(buf, NULL, 10);
1475         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1476         pr_info("This threeg sysfs will be removed in 2012"
1477                 " - used by: %s\n", current->comm);
1478         if (ACPI_FAILURE(status))
1479                 return -EINVAL;
1480         return count;
1481 }
1482 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1483         set_bool_threeg);
1484
1485 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1486         char *buf)
1487 {
1488         pr_info("This interface sysfs will be removed in 2012"
1489                 " - used by: %s\n", current->comm);
1490         switch (interface->type) {
1491         case ACER_AMW0:
1492                 return sprintf(buf, "AMW0\n");
1493         case ACER_AMW0_V2:
1494                 return sprintf(buf, "AMW0 v2\n");
1495         case ACER_WMID:
1496                 return sprintf(buf, "WMID\n");
1497         case ACER_WMID_v2:
1498                 return sprintf(buf, "WMID v2\n");
1499         default:
1500                 return sprintf(buf, "Error!\n");
1501         }
1502 }
1503
1504 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1505
1506 static void acer_wmi_notify(u32 value, void *context)
1507 {
1508         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1509         union acpi_object *obj;
1510         struct event_return_value return_value;
1511         acpi_status status;
1512         u16 device_state;
1513         const struct key_entry *key;
1514
1515         status = wmi_get_event_data(value, &response);
1516         if (status != AE_OK) {
1517                 pr_warn("bad event status 0x%x\n", status);
1518                 return;
1519         }
1520
1521         obj = (union acpi_object *)response.pointer;
1522
1523         if (!obj)
1524                 return;
1525         if (obj->type != ACPI_TYPE_BUFFER) {
1526                 pr_warn("Unknown response received %d\n", obj->type);
1527                 kfree(obj);
1528                 return;
1529         }
1530         if (obj->buffer.length != 8) {
1531                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1532                 kfree(obj);
1533                 return;
1534         }
1535
1536         return_value = *((struct event_return_value *)obj->buffer.pointer);
1537         kfree(obj);
1538
1539         switch (return_value.function) {
1540         case WMID_HOTKEY_EVENT:
1541                 device_state = return_value.device_state;
1542                 pr_debug("device state: 0x%x\n", device_state);
1543
1544                 key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1545                                                         return_value.key_num);
1546                 if (!key) {
1547                         pr_warn("Unknown key number - 0x%x\n",
1548                                 return_value.key_num);
1549                 } else {
1550                         switch (key->keycode) {
1551                         case KEY_WLAN:
1552                         case KEY_BLUETOOTH:
1553                                 if (has_cap(ACER_CAP_WIRELESS))
1554                                         rfkill_set_sw_state(wireless_rfkill,
1555                                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1556                                 if (has_cap(ACER_CAP_THREEG))
1557                                         rfkill_set_sw_state(threeg_rfkill,
1558                                                 !(device_state & ACER_WMID3_GDS_THREEG));
1559                                 if (has_cap(ACER_CAP_BLUETOOTH))
1560                                         rfkill_set_sw_state(bluetooth_rfkill,
1561                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1562                                 break;
1563                         }
1564                         sparse_keymap_report_entry(acer_wmi_input_dev, key,
1565                                                    1, true);
1566                 }
1567                 break;
1568         default:
1569                 pr_warn("Unknown function number - %d - %d\n",
1570                         return_value.function, return_value.key_num);
1571                 break;
1572         }
1573 }
1574
1575 static acpi_status
1576 wmid3_set_lm_mode(struct lm_input_params *params,
1577                   struct lm_return_value *return_value)
1578 {
1579         acpi_status status;
1580         union acpi_object *obj;
1581
1582         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1583         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1584
1585         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1586         if (ACPI_FAILURE(status))
1587                 return status;
1588
1589         obj = output.pointer;
1590
1591         if (!obj)
1592                 return AE_ERROR;
1593         else if (obj->type != ACPI_TYPE_BUFFER) {
1594                 kfree(obj);
1595                 return AE_ERROR;
1596         }
1597         if (obj->buffer.length != 4) {
1598                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1599                 kfree(obj);
1600                 return AE_ERROR;
1601         }
1602
1603         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1604         kfree(obj);
1605
1606         return status;
1607 }
1608
1609 static int acer_wmi_enable_ec_raw(void)
1610 {
1611         struct lm_return_value return_value;
1612         acpi_status status;
1613         struct lm_input_params params = {
1614                 .function_num = 0x1,
1615                 .commun_devices = 0xFFFF,
1616                 .devices = 0xFFFF,
1617                 .lm_status = 0x00,            /* Launch Manager Deactive */
1618         };
1619
1620         status = wmid3_set_lm_mode(&params, &return_value);
1621
1622         if (return_value.error_code || return_value.ec_return_value)
1623                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1624                         return_value.error_code,
1625                         return_value.ec_return_value);
1626         else
1627                 pr_info("Enabled EC raw mode\n");
1628
1629         return status;
1630 }
1631
1632 static int acer_wmi_enable_lm(void)
1633 {
1634         struct lm_return_value return_value;
1635         acpi_status status;
1636         struct lm_input_params params = {
1637                 .function_num = 0x1,
1638                 .commun_devices = 0xFFFF,
1639                 .devices = 0xFFFF,
1640                 .lm_status = 0x01,            /* Launch Manager Active */
1641         };
1642
1643         status = wmid3_set_lm_mode(&params, &return_value);
1644
1645         if (return_value.error_code || return_value.ec_return_value)
1646                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1647                         return_value.error_code,
1648                         return_value.ec_return_value);
1649
1650         return status;
1651 }
1652
1653 static int __init acer_wmi_input_setup(void)
1654 {
1655         acpi_status status;
1656         int err;
1657
1658         acer_wmi_input_dev = input_allocate_device();
1659         if (!acer_wmi_input_dev)
1660                 return -ENOMEM;
1661
1662         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1663         acer_wmi_input_dev->phys = "wmi/input0";
1664         acer_wmi_input_dev->id.bustype = BUS_HOST;
1665
1666         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1667         if (err)
1668                 goto err_free_dev;
1669
1670         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1671                                                 acer_wmi_notify, NULL);
1672         if (ACPI_FAILURE(status)) {
1673                 err = -EIO;
1674                 goto err_free_keymap;
1675         }
1676
1677         err = input_register_device(acer_wmi_input_dev);
1678         if (err)
1679                 goto err_uninstall_notifier;
1680
1681         return 0;
1682
1683 err_uninstall_notifier:
1684         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1685 err_free_keymap:
1686         sparse_keymap_free(acer_wmi_input_dev);
1687 err_free_dev:
1688         input_free_device(acer_wmi_input_dev);
1689         return err;
1690 }
1691
1692 static void acer_wmi_input_destroy(void)
1693 {
1694         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1695         sparse_keymap_free(acer_wmi_input_dev);
1696         input_unregister_device(acer_wmi_input_dev);
1697 }
1698
1699 /*
1700  * debugfs functions
1701  */
1702 static u32 get_wmid_devices(void)
1703 {
1704         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1705         union acpi_object *obj;
1706         acpi_status status;
1707         u32 devices = 0;
1708
1709         status = wmi_query_block(WMID_GUID2, 1, &out);
1710         if (ACPI_FAILURE(status))
1711                 return 0;
1712
1713         obj = (union acpi_object *) out.pointer;
1714         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1715                 (obj->buffer.length == sizeof(u32) ||
1716                 obj->buffer.length == sizeof(u64))) {
1717                 devices = *((u32 *) obj->buffer.pointer);
1718         } else if (obj->type == ACPI_TYPE_INTEGER) {
1719                 devices = (u32) obj->integer.value;
1720         }
1721
1722         kfree(out.pointer);
1723         return devices;
1724 }
1725
1726 /*
1727  * Platform device
1728  */
1729 static int __devinit acer_platform_probe(struct platform_device *device)
1730 {
1731         int err;
1732
1733         if (has_cap(ACER_CAP_MAILLED)) {
1734                 err = acer_led_init(&device->dev);
1735                 if (err)
1736                         goto error_mailled;
1737         }
1738
1739         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1740                 err = acer_backlight_init(&device->dev);
1741                 if (err)
1742                         goto error_brightness;
1743         }
1744
1745         err = acer_rfkill_init(&device->dev);
1746         if (err)
1747                 goto error_rfkill;
1748
1749         return err;
1750
1751 error_rfkill:
1752         if (has_cap(ACER_CAP_BRIGHTNESS))
1753                 acer_backlight_exit();
1754 error_brightness:
1755         if (has_cap(ACER_CAP_MAILLED))
1756                 acer_led_exit();
1757 error_mailled:
1758         return err;
1759 }
1760
1761 static int acer_platform_remove(struct platform_device *device)
1762 {
1763         if (has_cap(ACER_CAP_MAILLED))
1764                 acer_led_exit();
1765         if (has_cap(ACER_CAP_BRIGHTNESS))
1766                 acer_backlight_exit();
1767
1768         acer_rfkill_exit();
1769         return 0;
1770 }
1771
1772 static int acer_platform_suspend(struct platform_device *dev,
1773 pm_message_t state)
1774 {
1775         u32 value;
1776         struct acer_data *data = &interface->data;
1777
1778         if (!data)
1779                 return -ENOMEM;
1780
1781         if (has_cap(ACER_CAP_MAILLED)) {
1782                 get_u32(&value, ACER_CAP_MAILLED);
1783                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1784                 data->mailled = value;
1785         }
1786
1787         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1788                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1789                 data->brightness = value;
1790         }
1791
1792         return 0;
1793 }
1794
1795 static int acer_platform_resume(struct platform_device *device)
1796 {
1797         struct acer_data *data = &interface->data;
1798
1799         if (!data)
1800                 return -ENOMEM;
1801
1802         if (has_cap(ACER_CAP_MAILLED))
1803                 set_u32(data->mailled, ACER_CAP_MAILLED);
1804
1805         if (has_cap(ACER_CAP_BRIGHTNESS))
1806                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1807
1808         return 0;
1809 }
1810
1811 static void acer_platform_shutdown(struct platform_device *device)
1812 {
1813         struct acer_data *data = &interface->data;
1814
1815         if (!data)
1816                 return;
1817
1818         if (has_cap(ACER_CAP_MAILLED))
1819                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1820 }
1821
1822 static struct platform_driver acer_platform_driver = {
1823         .driver = {
1824                 .name = "acer-wmi",
1825                 .owner = THIS_MODULE,
1826         },
1827         .probe = acer_platform_probe,
1828         .remove = acer_platform_remove,
1829         .suspend = acer_platform_suspend,
1830         .resume = acer_platform_resume,
1831         .shutdown = acer_platform_shutdown,
1832 };
1833
1834 static struct platform_device *acer_platform_device;
1835
1836 static int remove_sysfs(struct platform_device *device)
1837 {
1838         if (has_cap(ACER_CAP_THREEG))
1839                 device_remove_file(&device->dev, &dev_attr_threeg);
1840
1841         device_remove_file(&device->dev, &dev_attr_interface);
1842
1843         return 0;
1844 }
1845
1846 static int create_sysfs(void)
1847 {
1848         int retval = -ENOMEM;
1849
1850         if (has_cap(ACER_CAP_THREEG)) {
1851                 retval = device_create_file(&acer_platform_device->dev,
1852                         &dev_attr_threeg);
1853                 if (retval)
1854                         goto error_sysfs;
1855         }
1856
1857         retval = device_create_file(&acer_platform_device->dev,
1858                 &dev_attr_interface);
1859         if (retval)
1860                 goto error_sysfs;
1861
1862         return 0;
1863
1864 error_sysfs:
1865                 remove_sysfs(acer_platform_device);
1866         return retval;
1867 }
1868
1869 static void remove_debugfs(void)
1870 {
1871         debugfs_remove(interface->debug.devices);
1872         debugfs_remove(interface->debug.root);
1873 }
1874
1875 static int create_debugfs(void)
1876 {
1877         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1878         if (!interface->debug.root) {
1879                 pr_err("Failed to create debugfs directory");
1880                 return -ENOMEM;
1881         }
1882
1883         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1884                                         interface->debug.root,
1885                                         &interface->debug.wmid_devices);
1886         if (!interface->debug.devices)
1887                 goto error_debugfs;
1888
1889         return 0;
1890
1891 error_debugfs:
1892         remove_debugfs();
1893         return -ENOMEM;
1894 }
1895
1896 static int __init acer_wmi_init(void)
1897 {
1898         int err;
1899
1900         pr_info("Acer Laptop ACPI-WMI Extras\n");
1901
1902         if (dmi_check_system(acer_blacklist)) {
1903                 pr_info("Blacklisted hardware detected - not loading\n");
1904                 return -ENODEV;
1905         }
1906
1907         find_quirks();
1908
1909         /*
1910          * Detect which ACPI-WMI interface we're using.
1911          */
1912         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1913                 interface = &AMW0_V2_interface;
1914
1915         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1916                 interface = &wmid_interface;
1917
1918         if (wmi_has_guid(WMID_GUID3))
1919                 interface = &wmid_v2_interface;
1920
1921         if (interface)
1922                 dmi_walk(type_aa_dmi_decode, NULL);
1923
1924         if (wmi_has_guid(WMID_GUID2) && interface) {
1925                 if (!has_type_aa && ACPI_FAILURE(WMID_set_capabilities())) {
1926                         pr_err("Unable to detect available WMID devices\n");
1927                         return -ENODEV;
1928                 }
1929                 /* WMID always provides brightness methods */
1930                 interface->capability |= ACER_CAP_BRIGHTNESS;
1931         } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
1932                 pr_err("No WMID device detection method found\n");
1933                 return -ENODEV;
1934         }
1935
1936         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1937                 interface = &AMW0_interface;
1938
1939                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1940                         pr_err("Unable to detect available AMW0 devices\n");
1941                         return -ENODEV;
1942                 }
1943         }
1944
1945         if (wmi_has_guid(AMW0_GUID1))
1946                 AMW0_find_mailled();
1947
1948         if (!interface) {
1949                 pr_err("No or unsupported WMI interface, unable to load\n");
1950                 return -ENODEV;
1951         }
1952
1953         set_quirks();
1954
1955         if (acpi_video_backlight_support()) {
1956                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1957                 pr_info("Brightness must be controlled by "
1958                        "generic video driver\n");
1959         }
1960
1961         if (wmi_has_guid(WMID_GUID3)) {
1962                 if (ec_raw_mode) {
1963                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
1964                                 pr_err("Cannot enable EC raw mode\n");
1965                                 return -ENODEV;
1966                         }
1967                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
1968                         pr_err("Cannot enable Launch Manager mode\n");
1969                         return -ENODEV;
1970                 }
1971         } else if (ec_raw_mode) {
1972                 pr_info("No WMID EC raw mode enable method\n");
1973         }
1974
1975         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
1976                 err = acer_wmi_input_setup();
1977                 if (err)
1978                         return err;
1979         }
1980
1981         err = platform_driver_register(&acer_platform_driver);
1982         if (err) {
1983                 pr_err("Unable to register platform driver.\n");
1984                 goto error_platform_register;
1985         }
1986
1987         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1988         if (!acer_platform_device) {
1989                 err = -ENOMEM;
1990                 goto error_device_alloc;
1991         }
1992
1993         err = platform_device_add(acer_platform_device);
1994         if (err)
1995                 goto error_device_add;
1996
1997         err = create_sysfs();
1998         if (err)
1999                 goto error_create_sys;
2000
2001         if (wmi_has_guid(WMID_GUID2)) {
2002                 interface->debug.wmid_devices = get_wmid_devices();
2003                 err = create_debugfs();
2004                 if (err)
2005                         goto error_create_debugfs;
2006         }
2007
2008         /* Override any initial settings with values from the commandline */
2009         acer_commandline_init();
2010
2011         return 0;
2012
2013 error_create_debugfs:
2014         remove_sysfs(acer_platform_device);
2015 error_create_sys:
2016         platform_device_del(acer_platform_device);
2017 error_device_add:
2018         platform_device_put(acer_platform_device);
2019 error_device_alloc:
2020         platform_driver_unregister(&acer_platform_driver);
2021 error_platform_register:
2022         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2023                 acer_wmi_input_destroy();
2024
2025         return err;
2026 }
2027
2028 static void __exit acer_wmi_exit(void)
2029 {
2030         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2031                 acer_wmi_input_destroy();
2032
2033         remove_sysfs(acer_platform_device);
2034         remove_debugfs();
2035         platform_device_unregister(acer_platform_device);
2036         platform_driver_unregister(&acer_platform_driver);
2037
2038         pr_info("Acer Laptop WMI Extras unloaded\n");
2039         return;
2040 }
2041
2042 module_init(acer_wmi_init);
2043 module_exit(acer_wmi_exit);