drivers/misc/acer-wmi.c

   1 /*
   2  *  Acer WMI Laptop Extras
   3  *
   4  *  Copyright (C) 2007-2008     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 ACER_WMI_VERSION        "0.1"
  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/backlight.h>
  33 #include <linux/leds.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/acpi.h>
  36 #include <linux/i8042.h>
  37
  38 #include <acpi/acpi_drivers.h>
  39
  40 MODULE_AUTHOR("Carlos Corbacho");
  41 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  42 MODULE_LICENSE("GPL");
  43
  44 #define ACER_LOGPREFIX "acer-wmi: "
  45 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
  46 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
  47 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
  48
  49 /*
  50  * The following defines quirks to get some specific functions to work
  51  * which are known to not be supported over ACPI-WMI (such as the mail LED
  52  * on WMID based Acer's)
  53  */
  54 struct acer_quirks {
  55         const char *vendor;
  56         const char *model;
  57         u16 quirks;
  58 };
  59
  60 /*
  61  * Magic Number
  62  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  63  * (it's also used in acerhk when directly accessing the BIOS)
  64  */
  65 #define ACER_AMW0_WRITE 0x9610
  66
  67 /*
  68  * Bit masks for the AMW0 interface
  69  */
  70 #define ACER_AMW0_WIRELESS_MASK  0x35
  71 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  72 #define ACER_AMW0_MAILLED_MASK   0x31
  73
  74 /*
  75  * Method IDs for WMID interface
  76  */
  77 #define ACER_WMID_GET_WIRELESS_METHODID         1
  78 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  79 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  80 #define ACER_WMID_SET_WIRELESS_METHODID         4
  81 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  82 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  83 #define ACER_WMID_GET_THREEG_METHODID           10
  84 #define ACER_WMID_SET_THREEG_METHODID           11
  85
  86 /*
  87  * Acer ACPI method GUIDs
  88  */
  89 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  90 #define WMID_GUID1              "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
  91 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
  92
  93 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  94 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
  95
  96 /* Temporary workaround until the WMI sysfs interface goes in */
  97 MODULE_ALIAS("dmi:*:*Acer*:*:");
  98
  99 /*
 100  * Interface capability flags
 101  */
 102 #define ACER_CAP_MAILLED                (1<<0)
 103 #define ACER_CAP_WIRELESS               (1<<1)
 104 #define ACER_CAP_BLUETOOTH              (1<<2)
 105 #define ACER_CAP_BRIGHTNESS             (1<<3)
 106 #define ACER_CAP_THREEG                 (1<<4)
 107 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 108
 109 /*
 110  * Interface type flags
 111  */
 112 enum interface_flags {
 113         ACER_AMW0,
 114         ACER_AMW0_V2,
 115         ACER_WMID,
 116 };
 117
 118 #define ACER_DEFAULT_WIRELESS  0
 119 #define ACER_DEFAULT_BLUETOOTH 0
 120 #define ACER_DEFAULT_MAILLED   0
 121 #define ACER_DEFAULT_THREEG    0
 122
 123 static int max_brightness = 0xF;
 124
 125 static int wireless = -1;
 126 static int bluetooth = -1;
 127 static int mailled = -1;
 128 static int brightness = -1;
 129 static int threeg = -1;
 130 static int force_series;
 131
 132 module_param(mailled, int, 0444);
 133 module_param(wireless, int, 0444);
 134 module_param(bluetooth, int, 0444);
 135 module_param(brightness, int, 0444);
 136 module_param(threeg, int, 0444);
 137 module_param(force_series, int, 0444);
 138 MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
 139 MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
 140 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 141 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 142 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 143 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 144
 145 struct acer_data {
 146         int mailled;
 147         int wireless;
 148         int bluetooth;
 149         int threeg;
 150         int brightness;
 151 };
 152
 153 /* Each low-level interface must define at least some of the following */
 154 struct wmi_interface {
 155         /* The WMI device type */
 156         u32 type;
 157
 158         /* The capabilities this interface provides */
 159         u32 capability;
 160
 161         /* Private data for the current interface */
 162         struct acer_data data;
 163 };
 164
 165 /* The static interface pointer, points to the currently detected interface */
 166 static struct wmi_interface *interface;
 167
 168 /*
 169  * Embedded Controller quirks
 170  * Some laptops require us to directly access the EC to either enable or query
 171  * features that are not available through WMI.
 172  */
 173
 174 struct quirk_entry {
 175         u8 wireless;
 176         u8 mailled;
 177         s8 brightness;
 178         u8 bluetooth;
 179 };
 180
 181 static struct quirk_entry *quirks;
 182
 183 static void set_quirks(void)
 184 {
 185         if (quirks->mailled)
 186                 interface->capability |= ACER_CAP_MAILLED;
 187
 188         if (quirks->brightness)
 189                 interface->capability |= ACER_CAP_BRIGHTNESS;
 190 }
 191
 192 static int dmi_matched(const struct dmi_system_id *dmi)
 193 {
 194         quirks = dmi->driver_data;
 195         return 0;
 196 }
 197
 198 static struct quirk_entry quirk_unknown = {
 199 };
 200
 201 static struct quirk_entry quirk_acer_aspire_1520 = {
 202         .brightness = -1,
 203 };
 204
 205 static struct quirk_entry quirk_acer_travelmate_2490 = {
 206         .mailled = 1,
 207 };
 208
 209 /* This AMW0 laptop has no bluetooth */
 210 static struct quirk_entry quirk_medion_md_98300 = {
 211         .wireless = 1,
 212 };
 213
 214 static struct dmi_system_id acer_quirks[] = {
 215         {
 216                 .callback = dmi_matched,
 217                 .ident = "Acer Aspire 1360",
 218                 .matches = {
 219                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 220                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 221                 },
 222                 .driver_data = &quirk_acer_aspire_1520,
 223         },
 224         {
 225                 .callback = dmi_matched,
 226                 .ident = "Acer Aspire 1520",
 227                 .matches = {
 228                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 229                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 230                 },
 231                 .driver_data = &quirk_acer_aspire_1520,
 232         },
 233         {
 234                 .callback = dmi_matched,
 235                 .ident = "Acer Aspire 3100",
 236                 .matches = {
 237                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 238                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 239                 },
 240                 .driver_data = &quirk_acer_travelmate_2490,
 241         },
 242         {
 243                 .callback = dmi_matched,
 244                 .ident = "Acer Aspire 3610",
 245                 .matches = {
 246                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 247                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 248                 },
 249                 .driver_data = &quirk_acer_travelmate_2490,
 250         },
 251         {
 252                 .callback = dmi_matched,
 253                 .ident = "Acer Aspire 5100",
 254                 .matches = {
 255                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 256                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 257                 },
 258                 .driver_data = &quirk_acer_travelmate_2490,
 259         },
 260         {
 261                 .callback = dmi_matched,
 262                 .ident = "Acer Aspire 5610",
 263                 .matches = {
 264                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 265                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 266                 },
 267                 .driver_data = &quirk_acer_travelmate_2490,
 268         },
 269         {
 270                 .callback = dmi_matched,
 271                 .ident = "Acer Aspire 5630",
 272                 .matches = {
 273                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 274                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 275                 },
 276                 .driver_data = &quirk_acer_travelmate_2490,
 277         },
 278         {
 279                 .callback = dmi_matched,
 280                 .ident = "Acer Aspire 5650",
 281                 .matches = {
 282                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 283                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 284                 },
 285                 .driver_data = &quirk_acer_travelmate_2490,
 286         },
 287         {
 288                 .callback = dmi_matched,
 289                 .ident = "Acer Aspire 5680",
 290                 .matches = {
 291                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 292                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 293                 },
 294                 .driver_data = &quirk_acer_travelmate_2490,
 295         },
 296         {
 297                 .callback = dmi_matched,
 298                 .ident = "Acer Aspire 9110",
 299                 .matches = {
 300                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 301                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 302                 },
 303                 .driver_data = &quirk_acer_travelmate_2490,
 304         },
 305         {
 306                 .callback = dmi_matched,
 307                 .ident = "Acer TravelMate 2490",
 308                 .matches = {
 309                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 310                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 311                 },
 312                 .driver_data = &quirk_acer_travelmate_2490,
 313         },
 314         {
 315                 .callback = dmi_matched,
 316                 .ident = "Acer TravelMate 4200",
 317                 .matches = {
 318                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 319                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 320                 },
 321                 .driver_data = &quirk_acer_travelmate_2490,
 322         },
 323         {
 324                 .callback = dmi_matched,
 325                 .ident = "Medion MD 98300",
 326                 .matches = {
 327                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 328                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 329                 },
 330                 .driver_data = &quirk_medion_md_98300,
 331         },
 332         {}
 333 };
 334
 335 /* Find which quirks are needed for a particular vendor/ model pair */
 336 static void find_quirks(void)
 337 {
 338         if (!force_series) {
 339                 dmi_check_system(acer_quirks);
 340         } else if (force_series == 2490) {
 341                 quirks = &quirk_acer_travelmate_2490;
 342         }
 343
 344         if (quirks == NULL)
 345                 quirks = &quirk_unknown;
 346
 347         set_quirks();
 348 }
 349
 350 /*
 351  * General interface convenience methods
 352  */
 353
 354 static bool has_cap(u32 cap)
 355 {
 356         if ((interface->capability & cap) != 0)
 357                 return 1;
 358
 359         return 0;
 360 }
 361
 362 /*
 363  * AMW0 (V1) interface
 364  */
 365 struct wmab_args {
 366         u32 eax;
 367         u32 ebx;
 368         u32 ecx;
 369         u32 edx;
 370 };
 371
 372 struct wmab_ret {
 373         u32 eax;
 374         u32 ebx;
 375         u32 ecx;
 376         u32 edx;
 377         u32 eex;
 378 };
 379
 380 static acpi_status wmab_execute(struct wmab_args *regbuf,
 381 struct acpi_buffer *result)
 382 {
 383         struct acpi_buffer input;
 384         acpi_status status;
 385         input.length = sizeof(struct wmab_args);
 386         input.pointer = (u8 *)regbuf;
 387
 388         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 389
 390         return status;
 391 }
 392
 393 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 394 struct wmi_interface *iface)
 395 {
 396         int err;
 397         u8 result;
 398
 399         switch (cap) {
 400         case ACER_CAP_MAILLED:
 401                 switch (quirks->mailled) {
 402                 default:
 403                         err = ec_read(0xA, &result);
 404                         if (err)
 405                                 return AE_ERROR;
 406                         *value = (result >> 7) & 0x1;
 407                         return AE_OK;
 408                 }
 409                 break;
 410         case ACER_CAP_WIRELESS:
 411                 switch (quirks->wireless) {
 412                 case 1:
 413                         err = ec_read(0x7B, &result);
 414                         if (err)
 415                                 return AE_ERROR;
 416                         *value = result & 0x1;
 417                         return AE_OK;
 418                 default:
 419                         err = ec_read(0xA, &result);
 420                         if (err)
 421                                 return AE_ERROR;
 422                         *value = (result >> 2) & 0x1;
 423                         return AE_OK;
 424                 }
 425                 break;
 426         case ACER_CAP_BLUETOOTH:
 427                 switch (quirks->bluetooth) {
 428                 default:
 429                         err = ec_read(0xA, &result);
 430                         if (err)
 431                                 return AE_ERROR;
 432                         *value = (result >> 4) & 0x1;
 433                         return AE_OK;
 434                 }
 435                 break;
 436         case ACER_CAP_BRIGHTNESS:
 437                 switch (quirks->brightness) {
 438                 default:
 439                         err = ec_read(0x83, &result);
 440                         if (err)
 441                                 return AE_ERROR;
 442                         *value = result;
 443                         return AE_OK;
 444                 }
 445                 break;
 446         default:
 447                 return AE_BAD_ADDRESS;
 448         }
 449         return AE_OK;
 450 }
 451
 452 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 453 {
 454         struct wmab_args args;
 455
 456         args.eax = ACER_AMW0_WRITE;
 457         args.ebx = value ? (1<<8) : 0;
 458         args.ecx = args.edx = 0;
 459
 460         switch (cap) {
 461         case ACER_CAP_MAILLED:
 462                 if (value > 1)
 463                         return AE_BAD_PARAMETER;
 464                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 465                 break;
 466         case ACER_CAP_WIRELESS:
 467                 if (value > 1)
 468                         return AE_BAD_PARAMETER;
 469                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 470                 break;
 471         case ACER_CAP_BLUETOOTH:
 472                 if (value > 1)
 473                         return AE_BAD_PARAMETER;
 474                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 475                 break;
 476         case ACER_CAP_BRIGHTNESS:
 477                 if (value > max_brightness)
 478                         return AE_BAD_PARAMETER;
 479                 switch (quirks->brightness) {
 480                 default:
 481                         return ec_write(0x83, value);
 482                         break;
 483                 }
 484         default:
 485                 return AE_BAD_ADDRESS;
 486         }
 487
 488         /* Actually do the set */
 489         return wmab_execute(&args, NULL);
 490 }
 491
 492 static acpi_status AMW0_find_mailled(void)
 493 {
 494         struct wmab_args args;
 495         struct wmab_ret ret;
 496         acpi_status status = AE_OK;
 497         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 498         union acpi_object *obj;
 499
 500         args.eax = 0x86;
 501         args.ebx = args.ecx = args.edx = 0;
 502
 503         status = wmab_execute(&args, &out);
 504         if (ACPI_FAILURE(status))
 505                 return status;
 506
 507         obj = (union acpi_object *) out.pointer;
 508         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 509         obj->buffer.length == sizeof(struct wmab_ret)) {
 510                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 511         } else {
 512                 return AE_ERROR;
 513         }
 514
 515         if (ret.eex & 0x1)
 516                 interface->capability |= ACER_CAP_MAILLED;
 517
 518         kfree(out.pointer);
 519
 520         return AE_OK;
 521 }
 522
 523 static acpi_status AMW0_set_capabilities(void)
 524 {
 525         struct wmab_args args;
 526         struct wmab_ret ret;
 527         acpi_status status = AE_OK;
 528         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 529         union acpi_object *obj;
 530
 531         args.eax = ACER_AMW0_WRITE;
 532         args.ecx = args.edx = 0;
 533
 534         args.ebx = 0xa2 << 8;
 535         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 536
 537         status = wmab_execute(&args, &out);
 538         if (ACPI_FAILURE(status))
 539                 return status;
 540
 541         obj = (union acpi_object *) out.pointer;
 542         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 543         obj->buffer.length == sizeof(struct wmab_ret)) {
 544                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 545         } else {
 546                 return AE_ERROR;
 547         }
 548
 549         if (ret.eax & 0x1)
 550                 interface->capability |= ACER_CAP_WIRELESS;
 551
 552         args.ebx = 2 << 8;
 553         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 554
 555         status = wmab_execute(&args, &out);
 556         if (ACPI_FAILURE(status))
 557                 return status;
 558
 559         obj = (union acpi_object *) out.pointer;
 560         if (obj && obj->type == ACPI_TYPE_BUFFER
 561         && obj->buffer.length == sizeof(struct wmab_ret)) {
 562                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 563         } else {
 564                 return AE_ERROR;
 565         }
 566
 567         if (ret.eax & 0x1)
 568                 interface->capability |= ACER_CAP_BLUETOOTH;
 569
 570         kfree(out.pointer);
 571
 572         /*
 573          * This appears to be safe to enable, since all Wistron based laptops
 574          * appear to use the same EC register for brightness, even if they
 575          * differ for wireless, etc
 576          */
 577         if (quirks->brightness >= 0)
 578                 interface->capability |= ACER_CAP_BRIGHTNESS;
 579
 580         return AE_OK;
 581 }
 582
 583 static struct wmi_interface AMW0_interface = {
 584         .type = ACER_AMW0,
 585 };
 586
 587 static struct wmi_interface AMW0_V2_interface = {
 588         .type = ACER_AMW0_V2,
 589 };
 590
 591 /*
 592  * New interface (The WMID interface)
 593  */
 594 static acpi_status
 595 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 596 {
 597         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 598         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 599         union acpi_object *obj;
 600         u32 tmp;
 601         acpi_status status;
 602
 603         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 604
 605         if (ACPI_FAILURE(status))
 606                 return status;
 607
 608         obj = (union acpi_object *) result.pointer;
 609         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 610                 obj->buffer.length == sizeof(u32)) {
 611                 tmp = *((u32 *) obj->buffer.pointer);
 612         } else {
 613                 tmp = 0;
 614         }
 615
 616         if (out)
 617                 *out = tmp;
 618
 619         kfree(result.pointer);
 620
 621         return status;
 622 }
 623
 624 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 625 struct wmi_interface *iface)
 626 {
 627         acpi_status status;
 628         u8 tmp;
 629         u32 result, method_id = 0;
 630
 631         switch (cap) {
 632         case ACER_CAP_WIRELESS:
 633                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 634                 break;
 635         case ACER_CAP_BLUETOOTH:
 636                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 637                 break;
 638         case ACER_CAP_BRIGHTNESS:
 639                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 640                 break;
 641         case ACER_CAP_THREEG:
 642                 method_id = ACER_WMID_GET_THREEG_METHODID;
 643                 break;
 644         case ACER_CAP_MAILLED:
 645                 if (quirks->mailled == 1) {
 646                         ec_read(0x9f, &tmp);
 647                         *value = tmp & 0x1;
 648                         return 0;
 649                 }
 650         default:
 651                 return AE_BAD_ADDRESS;
 652         }
 653         status = WMI_execute_u32(method_id, 0, &result);
 654
 655         if (ACPI_SUCCESS(status))
 656                 *value = (u8)result;
 657
 658         return status;
 659 }
 660
 661 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 662 {
 663         u32 method_id = 0;
 664         char param;
 665
 666         switch (cap) {
 667         case ACER_CAP_BRIGHTNESS:
 668                 if (value > max_brightness)
 669                         return AE_BAD_PARAMETER;
 670                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 671                 break;
 672         case ACER_CAP_WIRELESS:
 673                 if (value > 1)
 674                         return AE_BAD_PARAMETER;
 675                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 676                 break;
 677         case ACER_CAP_BLUETOOTH:
 678                 if (value > 1)
 679                         return AE_BAD_PARAMETER;
 680                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 681                 break;
 682         case ACER_CAP_THREEG:
 683                 if (value > 1)
 684                         return AE_BAD_PARAMETER;
 685                 method_id = ACER_WMID_SET_THREEG_METHODID;
 686                 break;
 687         case ACER_CAP_MAILLED:
 688                 if (value > 1)
 689                         return AE_BAD_PARAMETER;
 690                 if (quirks->mailled == 1) {
 691                         param = value ? 0x92 : 0x93;
 692                         i8042_command(&param, 0x1059);
 693                         return 0;
 694                 }
 695                 break;
 696         default:
 697                 return AE_BAD_ADDRESS;
 698         }
 699         return WMI_execute_u32(method_id, (u32)value, NULL);
 700 }
 701
 702 static acpi_status WMID_set_capabilities(void)
 703 {
 704         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 705         union acpi_object *obj;
 706         acpi_status status;
 707         u32 devices;
 708
 709         status = wmi_query_block(WMID_GUID2, 1, &out);
 710         if (ACPI_FAILURE(status))
 711                 return status;
 712
 713         obj = (union acpi_object *) out.pointer;
 714         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 715                 obj->buffer.length == sizeof(u32)) {
 716                 devices = *((u32 *) obj->buffer.pointer);
 717         } else {
 718                 return AE_ERROR;
 719         }
 720
 721         /* Not sure on the meaning of the relevant bits yet to detect these */
 722         interface->capability |= ACER_CAP_WIRELESS;
 723         interface->capability |= ACER_CAP_THREEG;
 724
 725         /* WMID always provides brightness methods */
 726         interface->capability |= ACER_CAP_BRIGHTNESS;
 727
 728         if (devices & 0x10)
 729                 interface->capability |= ACER_CAP_BLUETOOTH;
 730
 731         if (!(devices & 0x20))
 732                 max_brightness = 0x9;
 733
 734         return status;
 735 }
 736
 737 static struct wmi_interface wmid_interface = {
 738         .type = ACER_WMID,
 739 };
 740
 741 /*
 742  * Generic Device (interface-independent)
 743  */
 744
 745 static acpi_status get_u32(u32 *value, u32 cap)
 746 {
 747         acpi_status status = AE_BAD_ADDRESS;
 748
 749         switch (interface->type) {
 750         case ACER_AMW0:
 751                 status = AMW0_get_u32(value, cap, interface);
 752                 break;
 753         case ACER_AMW0_V2:
 754                 if (cap == ACER_CAP_MAILLED) {
 755                         status = AMW0_get_u32(value, cap, interface);
 756                         break;
 757                 }
 758         case ACER_WMID:
 759                 status = WMID_get_u32(value, cap, interface);
 760                 break;
 761         }
 762
 763         return status;
 764 }
 765
 766 static acpi_status set_u32(u32 value, u32 cap)
 767 {
 768         if (interface->capability & cap) {
 769                 switch (interface->type) {
 770                 case ACER_AMW0:
 771                         return AMW0_set_u32(value, cap, interface);
 772                 case ACER_AMW0_V2:
 773                 case ACER_WMID:
 774                         return WMID_set_u32(value, cap, interface);
 775                 default:
 776                         return AE_BAD_PARAMETER;
 777                 }
 778         }
 779         return AE_BAD_PARAMETER;
 780 }
 781
 782 static void __init acer_commandline_init(void)
 783 {
 784         /*
 785          * These will all fail silently if the value given is invalid, or the
 786          * capability isn't available on the given interface
 787          */
 788         set_u32(mailled, ACER_CAP_MAILLED);
 789         set_u32(wireless, ACER_CAP_WIRELESS);
 790         set_u32(bluetooth, ACER_CAP_BLUETOOTH);
 791         set_u32(threeg, ACER_CAP_THREEG);
 792         set_u32(brightness, ACER_CAP_BRIGHTNESS);
 793 }
 794
 795 /*
 796  * LED device (Mail LED only, no other LEDs known yet)
 797  */
 798 static void mail_led_set(struct led_classdev *led_cdev,
 799 enum led_brightness value)
 800 {
 801         set_u32(value, ACER_CAP_MAILLED);
 802 }
 803
 804 static struct led_classdev mail_led = {
 805         .name = "acer-wmi::mail",
 806         .brightness_set = mail_led_set,
 807 };
 808
 809 static int __devinit acer_led_init(struct device *dev)
 810 {
 811         return led_classdev_register(dev, &mail_led);
 812 }
 813
 814 static void acer_led_exit(void)
 815 {
 816         led_classdev_unregister(&mail_led);
 817 }
 818
 819 /*
 820  * Backlight device
 821  */
 822 static struct backlight_device *acer_backlight_device;
 823
 824 static int read_brightness(struct backlight_device *bd)
 825 {
 826         u32 value;
 827         get_u32(&value, ACER_CAP_BRIGHTNESS);
 828         return value;
 829 }
 830
 831 static int update_bl_status(struct backlight_device *bd)
 832 {
 833         set_u32(bd->props.brightness, ACER_CAP_BRIGHTNESS);
 834         return 0;
 835 }
 836
 837 static struct backlight_ops acer_bl_ops = {
 838         .get_brightness = read_brightness,
 839         .update_status = update_bl_status,
 840 };
 841
 842 static int __devinit acer_backlight_init(struct device *dev)
 843 {
 844         struct backlight_device *bd;
 845
 846         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
 847         if (IS_ERR(bd)) {
 848                 printk(ACER_ERR "Could not register Acer backlight device\n");
 849                 acer_backlight_device = NULL;
 850                 return PTR_ERR(bd);
 851         }
 852
 853         acer_backlight_device = bd;
 854
 855         bd->props.max_brightness = max_brightness;
 856         bd->props.brightness = read_brightness(NULL);
 857         backlight_update_status(bd);
 858         return 0;
 859 }
 860
 861 static void acer_backlight_exit(void)
 862 {
 863         backlight_device_unregister(acer_backlight_device);
 864 }
 865
 866 /*
 867  * Read/ write bool sysfs macro
 868  */
 869 #define show_set_bool(value, cap) \
 870 static ssize_t \
 871 show_bool_##value(struct device *dev, struct device_attribute *attr, \
 872         char *buf) \
 873 { \
 874         u32 result; \
 875         acpi_status status = get_u32(&result, cap); \
 876         if (ACPI_SUCCESS(status)) \
 877                 return sprintf(buf, "%u\n", result); \
 878         return sprintf(buf, "Read error\n"); \
 879 } \
 880 \
 881 static ssize_t \
 882 set_bool_##value(struct device *dev, struct device_attribute *attr, \
 883         const char *buf, size_t count) \
 884 { \
 885         u32 tmp = simple_strtoul(buf, NULL, 10); \
 886         acpi_status status = set_u32(tmp, cap); \
 887                 if (ACPI_FAILURE(status)) \
 888                         return -EINVAL; \
 889         return count; \
 890 } \
 891 static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
 892         show_bool_##value, set_bool_##value);
 893
 894 show_set_bool(wireless, ACER_CAP_WIRELESS);
 895 show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
 896 show_set_bool(threeg, ACER_CAP_THREEG);
 897
 898 /*
 899  * Read interface sysfs macro
 900  */
 901 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
 902         char *buf)
 903 {
 904         switch (interface->type) {
 905         case ACER_AMW0:
 906                 return sprintf(buf, "AMW0\n");
 907         case ACER_AMW0_V2:
 908                 return sprintf(buf, "AMW0 v2\n");
 909         case ACER_WMID:
 910                 return sprintf(buf, "WMID\n");
 911         default:
 912                 return sprintf(buf, "Error!\n");
 913         }
 914 }
 915
 916 static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
 917         show_interface, NULL);
 918
 919 /*
 920  * Platform device
 921  */
 922 static int __devinit acer_platform_probe(struct platform_device *device)
 923 {
 924         int err;
 925
 926         if (has_cap(ACER_CAP_MAILLED)) {
 927                 err = acer_led_init(&device->dev);
 928                 if (err)
 929                         goto error_mailled;
 930         }
 931
 932         if (has_cap(ACER_CAP_BRIGHTNESS)) {
 933                 err = acer_backlight_init(&device->dev);
 934                 if (err)
 935                         goto error_brightness;
 936         }
 937
 938         return 0;
 939
 940 error_brightness:
 941         acer_led_exit();
 942 error_mailled:
 943         return err;
 944 }
 945
 946 static int acer_platform_remove(struct platform_device *device)
 947 {
 948         if (has_cap(ACER_CAP_MAILLED))
 949                 acer_led_exit();
 950         if (has_cap(ACER_CAP_BRIGHTNESS))
 951                 acer_backlight_exit();
 952         return 0;
 953 }
 954
 955 static int acer_platform_suspend(struct platform_device *dev,
 956 pm_message_t state)
 957 {
 958         u32 value;
 959         struct acer_data *data = &interface->data;
 960
 961         if (!data)
 962                 return -ENOMEM;
 963
 964         if (has_cap(ACER_CAP_WIRELESS)) {
 965                 get_u32(&value, ACER_CAP_WIRELESS);
 966                 data->wireless = value;
 967         }
 968
 969         if (has_cap(ACER_CAP_BLUETOOTH)) {
 970                 get_u32(&value, ACER_CAP_BLUETOOTH);
 971                 data->bluetooth = value;
 972         }
 973
 974         if (has_cap(ACER_CAP_MAILLED)) {
 975                 get_u32(&value, ACER_CAP_MAILLED);
 976                 data->mailled = value;
 977         }
 978
 979         if (has_cap(ACER_CAP_BRIGHTNESS)) {
 980                 get_u32(&value, ACER_CAP_BRIGHTNESS);
 981                 data->brightness = value;
 982         }
 983
 984         return 0;
 985 }
 986
 987 static int acer_platform_resume(struct platform_device *device)
 988 {
 989         struct acer_data *data = &interface->data;
 990
 991         if (!data)
 992                 return -ENOMEM;
 993
 994         if (has_cap(ACER_CAP_WIRELESS))
 995                 set_u32(data->wireless, ACER_CAP_WIRELESS);
 996
 997         if (has_cap(ACER_CAP_BLUETOOTH))
 998                 set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
 999
1000         if (has_cap(ACER_CAP_THREEG))
1001                 set_u32(data->threeg, ACER_CAP_THREEG);
1002
1003         if (has_cap(ACER_CAP_MAILLED))
1004                 set_u32(data->mailled, ACER_CAP_MAILLED);
1005
1006         if (has_cap(ACER_CAP_BRIGHTNESS))
1007                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1008
1009         return 0;
1010 }
1011
1012 static struct platform_driver acer_platform_driver = {
1013         .driver = {
1014                 .name = "acer-wmi",
1015                 .owner = THIS_MODULE,
1016         },
1017         .probe = acer_platform_probe,
1018         .remove = acer_platform_remove,
1019         .suspend = acer_platform_suspend,
1020         .resume = acer_platform_resume,
1021 };
1022
1023 static struct platform_device *acer_platform_device;
1024
1025 static int remove_sysfs(struct platform_device *device)
1026 {
1027         if (has_cap(ACER_CAP_WIRELESS))
1028                 device_remove_file(&device->dev, &dev_attr_wireless);
1029
1030         if (has_cap(ACER_CAP_BLUETOOTH))
1031                 device_remove_file(&device->dev, &dev_attr_bluetooth);
1032
1033         if (has_cap(ACER_CAP_THREEG))
1034                 device_remove_file(&device->dev, &dev_attr_threeg);
1035
1036         device_remove_file(&device->dev, &dev_attr_interface);
1037
1038         return 0;
1039 }
1040
1041 static int create_sysfs(void)
1042 {
1043         int retval = -ENOMEM;
1044
1045         if (has_cap(ACER_CAP_WIRELESS)) {
1046                 retval = device_create_file(&acer_platform_device->dev,
1047                         &dev_attr_wireless);
1048                 if (retval)
1049                         goto error_sysfs;
1050         }
1051
1052         if (has_cap(ACER_CAP_BLUETOOTH)) {
1053                 retval = device_create_file(&acer_platform_device->dev,
1054                         &dev_attr_bluetooth);
1055                 if (retval)
1056                         goto error_sysfs;
1057         }
1058
1059         if (has_cap(ACER_CAP_THREEG)) {
1060                 retval = device_create_file(&acer_platform_device->dev,
1061                         &dev_attr_threeg);
1062                 if (retval)
1063                         goto error_sysfs;
1064         }
1065
1066         retval = device_create_file(&acer_platform_device->dev,
1067                 &dev_attr_interface);
1068         if (retval)
1069                 goto error_sysfs;
1070
1071         return 0;
1072
1073 error_sysfs:
1074                 remove_sysfs(acer_platform_device);
1075         return retval;
1076 }
1077
1078 static int __init acer_wmi_init(void)
1079 {
1080         int err;
1081
1082         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
1083                         ACER_WMI_VERSION);
1084
1085         find_quirks();
1086
1087         /*
1088          * Detect which ACPI-WMI interface we're using.
1089          */
1090         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1091                 interface = &AMW0_V2_interface;
1092
1093         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1094                 interface = &wmid_interface;
1095
1096         if (wmi_has_guid(WMID_GUID2) && interface) {
1097                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1098                         printk(ACER_ERR "Unable to detect available WMID "
1099                                         "devices\n");
1100                         return -ENODEV;
1101                 }
1102         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1103                 printk(ACER_ERR "No WMID device detection method found\n");
1104                 return -ENODEV;
1105         }
1106
1107         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1108                 interface = &AMW0_interface;
1109
1110                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1111                         printk(ACER_ERR "Unable to detect available AMW0 "
1112                                         "devices\n");
1113                         return -ENODEV;
1114                 }
1115         }
1116
1117         if (wmi_has_guid(AMW0_GUID1))
1118                 AMW0_find_mailled();
1119
1120         if (!interface) {
1121                 printk(ACER_ERR "No or unsupported WMI interface, unable to "
1122                                 "load\n");
1123                 return -ENODEV;
1124         }
1125
1126         if (platform_driver_register(&acer_platform_driver)) {
1127                 printk(ACER_ERR "Unable to register platform driver.\n");
1128                 goto error_platform_register;
1129         }
1130         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1131         platform_device_add(acer_platform_device);
1132
1133         err = create_sysfs();
1134         if (err)
1135                 return err;
1136
1137         /* Override any initial settings with values from the commandline */
1138         acer_commandline_init();
1139
1140         return 0;
1141
1142 error_platform_register:
1143         return -ENODEV;
1144 }
1145
1146 static void __exit acer_wmi_exit(void)
1147 {
1148         remove_sysfs(acer_platform_device);
1149         platform_device_del(acer_platform_device);
1150         platform_driver_unregister(&acer_platform_driver);
1151
1152         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1153         return;
1154 }
1155
1156 module_init(acer_wmi_init);
1157 module_exit(acer_wmi_exit);