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/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/debugfs.h>
  39
  40 #include <acpi/acpi_drivers.h>
  41
  42 MODULE_AUTHOR("Carlos Corbacho");
  43 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  44 MODULE_LICENSE("GPL");
  45
  46 #define ACER_LOGPREFIX "acer-wmi: "
  47 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
  48 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
  49 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
  50
  51 /*
  52  * The following defines quirks to get some specific functions to work
  53  * which are known to not be supported over ACPI-WMI (such as the mail LED
  54  * on WMID based Acer's)
  55  */
  56 struct acer_quirks {
  57         const char *vendor;
  58         const char *model;
  59         u16 quirks;
  60 };
  61
  62 /*
  63  * Magic Number
  64  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  65  * (it's also used in acerhk when directly accessing the BIOS)
  66  */
  67 #define ACER_AMW0_WRITE 0x9610
  68
  69 /*
  70  * Bit masks for the AMW0 interface
  71  */
  72 #define ACER_AMW0_WIRELESS_MASK  0x35
  73 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  74 #define ACER_AMW0_MAILLED_MASK   0x31
  75
  76 /*
  77  * Method IDs for WMID interface
  78  */
  79 #define ACER_WMID_GET_WIRELESS_METHODID         1
  80 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  81 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  82 #define ACER_WMID_SET_WIRELESS_METHODID         4
  83 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  84 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  85 #define ACER_WMID_GET_THREEG_METHODID           10
  86 #define ACER_WMID_SET_THREEG_METHODID           11
  87
  88 /*
  89  * Acer ACPI method GUIDs
  90  */
  91 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  92 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
  93 #define WMID_GUID1              "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
  94 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
  95
  96 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  97 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
  98
  99 /* Temporary workaround until the WMI sysfs interface goes in */
 100 MODULE_ALIAS("dmi:*:*Acer*:*:");
 101
 102 /*
 103  * Interface capability flags
 104  */
 105 #define ACER_CAP_MAILLED                (1<<0)
 106 #define ACER_CAP_WIRELESS               (1<<1)
 107 #define ACER_CAP_BLUETOOTH              (1<<2)
 108 #define ACER_CAP_BRIGHTNESS             (1<<3)
 109 #define ACER_CAP_THREEG                 (1<<4)
 110 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 111
 112 /*
 113  * Interface type flags
 114  */
 115 enum interface_flags {
 116         ACER_AMW0,
 117         ACER_AMW0_V2,
 118         ACER_WMID,
 119 };
 120
 121 #define ACER_DEFAULT_WIRELESS  0
 122 #define ACER_DEFAULT_BLUETOOTH 0
 123 #define ACER_DEFAULT_MAILLED   0
 124 #define ACER_DEFAULT_THREEG    0
 125
 126 static int max_brightness = 0xF;
 127
 128 static int wireless = -1;
 129 static int bluetooth = -1;
 130 static int mailled = -1;
 131 static int brightness = -1;
 132 static int threeg = -1;
 133 static int force_series;
 134
 135 module_param(mailled, int, 0444);
 136 module_param(wireless, int, 0444);
 137 module_param(bluetooth, int, 0444);
 138 module_param(brightness, int, 0444);
 139 module_param(threeg, int, 0444);
 140 module_param(force_series, int, 0444);
 141 MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
 142 MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
 143 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 144 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 145 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 146 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 147
 148 struct acer_data {
 149         int mailled;
 150         int wireless;
 151         int bluetooth;
 152         int threeg;
 153         int brightness;
 154 };
 155
 156 struct acer_debug {
 157         struct dentry *root;
 158         struct dentry *devices;
 159         u32 wmid_devices;
 160 };
 161
 162 /* Each low-level interface must define at least some of the following */
 163 struct wmi_interface {
 164         /* The WMI device type */
 165         u32 type;
 166
 167         /* The capabilities this interface provides */
 168         u32 capability;
 169
 170         /* Private data for the current interface */
 171         struct acer_data data;
 172
 173         /* debugfs entries associated with this interface */
 174         struct acer_debug debug;
 175 };
 176
 177 /* The static interface pointer, points to the currently detected interface */
 178 static struct wmi_interface *interface;
 179
 180 /*
 181  * Embedded Controller quirks
 182  * Some laptops require us to directly access the EC to either enable or query
 183  * features that are not available through WMI.
 184  */
 185
 186 struct quirk_entry {
 187         u8 wireless;
 188         u8 mailled;
 189         s8 brightness;
 190         u8 bluetooth;
 191 };
 192
 193 static struct quirk_entry *quirks;
 194
 195 static void set_quirks(void)
 196 {
 197         if (quirks->mailled)
 198                 interface->capability |= ACER_CAP_MAILLED;
 199
 200         if (quirks->brightness)
 201                 interface->capability |= ACER_CAP_BRIGHTNESS;
 202 }
 203
 204 static int dmi_matched(const struct dmi_system_id *dmi)
 205 {
 206         quirks = dmi->driver_data;
 207         return 0;
 208 }
 209
 210 static struct quirk_entry quirk_unknown = {
 211 };
 212
 213 static struct quirk_entry quirk_acer_aspire_1520 = {
 214         .brightness = -1,
 215 };
 216
 217 static struct quirk_entry quirk_acer_travelmate_2490 = {
 218         .mailled = 1,
 219 };
 220
 221 /* This AMW0 laptop has no bluetooth */
 222 static struct quirk_entry quirk_medion_md_98300 = {
 223         .wireless = 1,
 224 };
 225
 226 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 227         .wireless = 2,
 228 };
 229
 230 static struct dmi_system_id acer_quirks[] = {
 231         {
 232                 .callback = dmi_matched,
 233                 .ident = "Acer Aspire 1360",
 234                 .matches = {
 235                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 236                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 237                 },
 238                 .driver_data = &quirk_acer_aspire_1520,
 239         },
 240         {
 241                 .callback = dmi_matched,
 242                 .ident = "Acer Aspire 1520",
 243                 .matches = {
 244                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 245                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 246                 },
 247                 .driver_data = &quirk_acer_aspire_1520,
 248         },
 249         {
 250                 .callback = dmi_matched,
 251                 .ident = "Acer Aspire 3100",
 252                 .matches = {
 253                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 254                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 255                 },
 256                 .driver_data = &quirk_acer_travelmate_2490,
 257         },
 258         {
 259                 .callback = dmi_matched,
 260                 .ident = "Acer Aspire 3610",
 261                 .matches = {
 262                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 263                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 264                 },
 265                 .driver_data = &quirk_acer_travelmate_2490,
 266         },
 267         {
 268                 .callback = dmi_matched,
 269                 .ident = "Acer Aspire 5100",
 270                 .matches = {
 271                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 272                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 273                 },
 274                 .driver_data = &quirk_acer_travelmate_2490,
 275         },
 276         {
 277                 .callback = dmi_matched,
 278                 .ident = "Acer Aspire 5610",
 279                 .matches = {
 280                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 281                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 282                 },
 283                 .driver_data = &quirk_acer_travelmate_2490,
 284         },
 285         {
 286                 .callback = dmi_matched,
 287                 .ident = "Acer Aspire 5630",
 288                 .matches = {
 289                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 290                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 291                 },
 292                 .driver_data = &quirk_acer_travelmate_2490,
 293         },
 294         {
 295                 .callback = dmi_matched,
 296                 .ident = "Acer Aspire 5650",
 297                 .matches = {
 298                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 299                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 300                 },
 301                 .driver_data = &quirk_acer_travelmate_2490,
 302         },
 303         {
 304                 .callback = dmi_matched,
 305                 .ident = "Acer Aspire 5680",
 306                 .matches = {
 307                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 308                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 309                 },
 310                 .driver_data = &quirk_acer_travelmate_2490,
 311         },
 312         {
 313                 .callback = dmi_matched,
 314                 .ident = "Acer Aspire 9110",
 315                 .matches = {
 316                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 317                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 318                 },
 319                 .driver_data = &quirk_acer_travelmate_2490,
 320         },
 321         {
 322                 .callback = dmi_matched,
 323                 .ident = "Acer TravelMate 2490",
 324                 .matches = {
 325                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 326                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 327                 },
 328                 .driver_data = &quirk_acer_travelmate_2490,
 329         },
 330         {
 331                 .callback = dmi_matched,
 332                 .ident = "Acer TravelMate 4200",
 333                 .matches = {
 334                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 335                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 336                 },
 337                 .driver_data = &quirk_acer_travelmate_2490,
 338         },
 339         {
 340                 .callback = dmi_matched,
 341                 .ident = "Fujitsu Siemens Amilo Li 1718",
 342                 .matches = {
 343                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 344                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 345                 },
 346                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 347         },
 348         {
 349                 .callback = dmi_matched,
 350                 .ident = "Medion MD 98300",
 351                 .matches = {
 352                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 353                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 354                 },
 355                 .driver_data = &quirk_medion_md_98300,
 356         },
 357         {}
 358 };
 359
 360 /* Find which quirks are needed for a particular vendor/ model pair */
 361 static void find_quirks(void)
 362 {
 363         if (!force_series) {
 364                 dmi_check_system(acer_quirks);
 365         } else if (force_series == 2490) {
 366                 quirks = &quirk_acer_travelmate_2490;
 367         }
 368
 369         if (quirks == NULL)
 370                 quirks = &quirk_unknown;
 371
 372         set_quirks();
 373 }
 374
 375 /*
 376  * General interface convenience methods
 377  */
 378
 379 static bool has_cap(u32 cap)
 380 {
 381         if ((interface->capability & cap) != 0)
 382                 return 1;
 383
 384         return 0;
 385 }
 386
 387 /*
 388  * AMW0 (V1) interface
 389  */
 390 struct wmab_args {
 391         u32 eax;
 392         u32 ebx;
 393         u32 ecx;
 394         u32 edx;
 395 };
 396
 397 struct wmab_ret {
 398         u32 eax;
 399         u32 ebx;
 400         u32 ecx;
 401         u32 edx;
 402         u32 eex;
 403 };
 404
 405 static acpi_status wmab_execute(struct wmab_args *regbuf,
 406 struct acpi_buffer *result)
 407 {
 408         struct acpi_buffer input;
 409         acpi_status status;
 410         input.length = sizeof(struct wmab_args);
 411         input.pointer = (u8 *)regbuf;
 412
 413         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 414
 415         return status;
 416 }
 417
 418 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 419 struct wmi_interface *iface)
 420 {
 421         int err;
 422         u8 result;
 423
 424         switch (cap) {
 425         case ACER_CAP_MAILLED:
 426                 switch (quirks->mailled) {
 427                 default:
 428                         err = ec_read(0xA, &result);
 429                         if (err)
 430                                 return AE_ERROR;
 431                         *value = (result >> 7) & 0x1;
 432                         return AE_OK;
 433                 }
 434                 break;
 435         case ACER_CAP_WIRELESS:
 436                 switch (quirks->wireless) {
 437                 case 1:
 438                         err = ec_read(0x7B, &result);
 439                         if (err)
 440                                 return AE_ERROR;
 441                         *value = result & 0x1;
 442                         return AE_OK;
 443                 case 2:
 444                         err = ec_read(0x71, &result);
 445                         if (err)
 446                                 return AE_ERROR;
 447                         *value = result & 0x1;
 448                         return AE_OK;
 449                 default:
 450                         err = ec_read(0xA, &result);
 451                         if (err)
 452                                 return AE_ERROR;
 453                         *value = (result >> 2) & 0x1;
 454                         return AE_OK;
 455                 }
 456                 break;
 457         case ACER_CAP_BLUETOOTH:
 458                 switch (quirks->bluetooth) {
 459                 default:
 460                         err = ec_read(0xA, &result);
 461                         if (err)
 462                                 return AE_ERROR;
 463                         *value = (result >> 4) & 0x1;
 464                         return AE_OK;
 465                 }
 466                 break;
 467         case ACER_CAP_BRIGHTNESS:
 468                 switch (quirks->brightness) {
 469                 default:
 470                         err = ec_read(0x83, &result);
 471                         if (err)
 472                                 return AE_ERROR;
 473                         *value = result;
 474                         return AE_OK;
 475                 }
 476                 break;
 477         default:
 478                 return AE_BAD_ADDRESS;
 479         }
 480         return AE_OK;
 481 }
 482
 483 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 484 {
 485         struct wmab_args args;
 486
 487         args.eax = ACER_AMW0_WRITE;
 488         args.ebx = value ? (1<<8) : 0;
 489         args.ecx = args.edx = 0;
 490
 491         switch (cap) {
 492         case ACER_CAP_MAILLED:
 493                 if (value > 1)
 494                         return AE_BAD_PARAMETER;
 495                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 496                 break;
 497         case ACER_CAP_WIRELESS:
 498                 if (value > 1)
 499                         return AE_BAD_PARAMETER;
 500                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 501                 break;
 502         case ACER_CAP_BLUETOOTH:
 503                 if (value > 1)
 504                         return AE_BAD_PARAMETER;
 505                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 506                 break;
 507         case ACER_CAP_BRIGHTNESS:
 508                 if (value > max_brightness)
 509                         return AE_BAD_PARAMETER;
 510                 switch (quirks->brightness) {
 511                 default:
 512                         return ec_write(0x83, value);
 513                         break;
 514                 }
 515         default:
 516                 return AE_BAD_ADDRESS;
 517         }
 518
 519         /* Actually do the set */
 520         return wmab_execute(&args, NULL);
 521 }
 522
 523 static acpi_status AMW0_find_mailled(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 = 0x86;
 532         args.ebx = args.ecx = args.edx = 0;
 533
 534         status = wmab_execute(&args, &out);
 535         if (ACPI_FAILURE(status))
 536                 return status;
 537
 538         obj = (union acpi_object *) out.pointer;
 539         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 540         obj->buffer.length == sizeof(struct wmab_ret)) {
 541                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 542         } else {
 543                 return AE_ERROR;
 544         }
 545
 546         if (ret.eex & 0x1)
 547                 interface->capability |= ACER_CAP_MAILLED;
 548
 549         kfree(out.pointer);
 550
 551         return AE_OK;
 552 }
 553
 554 static acpi_status AMW0_set_capabilities(void)
 555 {
 556         struct wmab_args args;
 557         struct wmab_ret ret;
 558         acpi_status status = AE_OK;
 559         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 560         union acpi_object *obj;
 561
 562         /*
 563          * On laptops with this strange GUID (non Acer), normal probing doesn't
 564          * work.
 565          */
 566         if (wmi_has_guid(AMW0_GUID2)) {
 567                 interface->capability |= ACER_CAP_WIRELESS;
 568                 return AE_OK;
 569         }
 570
 571         args.eax = ACER_AMW0_WRITE;
 572         args.ecx = args.edx = 0;
 573
 574         args.ebx = 0xa2 << 8;
 575         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 576
 577         status = wmab_execute(&args, &out);
 578         if (ACPI_FAILURE(status))
 579                 return status;
 580
 581         obj = (union acpi_object *) out.pointer;
 582         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 583         obj->buffer.length == sizeof(struct wmab_ret)) {
 584                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 585         } else {
 586                 return AE_ERROR;
 587         }
 588
 589         if (ret.eax & 0x1)
 590                 interface->capability |= ACER_CAP_WIRELESS;
 591
 592         args.ebx = 2 << 8;
 593         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 594
 595         status = wmab_execute(&args, &out);
 596         if (ACPI_FAILURE(status))
 597                 return status;
 598
 599         obj = (union acpi_object *) out.pointer;
 600         if (obj && obj->type == ACPI_TYPE_BUFFER
 601         && obj->buffer.length == sizeof(struct wmab_ret)) {
 602                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 603         } else {
 604                 return AE_ERROR;
 605         }
 606
 607         if (ret.eax & 0x1)
 608                 interface->capability |= ACER_CAP_BLUETOOTH;
 609
 610         kfree(out.pointer);
 611
 612         /*
 613          * This appears to be safe to enable, since all Wistron based laptops
 614          * appear to use the same EC register for brightness, even if they
 615          * differ for wireless, etc
 616          */
 617         if (quirks->brightness >= 0)
 618                 interface->capability |= ACER_CAP_BRIGHTNESS;
 619
 620         return AE_OK;
 621 }
 622
 623 static struct wmi_interface AMW0_interface = {
 624         .type = ACER_AMW0,
 625 };
 626
 627 static struct wmi_interface AMW0_V2_interface = {
 628         .type = ACER_AMW0_V2,
 629 };
 630
 631 /*
 632  * New interface (The WMID interface)
 633  */
 634 static acpi_status
 635 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 636 {
 637         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 638         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 639         union acpi_object *obj;
 640         u32 tmp;
 641         acpi_status status;
 642
 643         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 644
 645         if (ACPI_FAILURE(status))
 646                 return status;
 647
 648         obj = (union acpi_object *) result.pointer;
 649         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 650                 obj->buffer.length == sizeof(u32)) {
 651                 tmp = *((u32 *) obj->buffer.pointer);
 652         } else {
 653                 tmp = 0;
 654         }
 655
 656         if (out)
 657                 *out = tmp;
 658
 659         kfree(result.pointer);
 660
 661         return status;
 662 }
 663
 664 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 665 struct wmi_interface *iface)
 666 {
 667         acpi_status status;
 668         u8 tmp;
 669         u32 result, method_id = 0;
 670
 671         switch (cap) {
 672         case ACER_CAP_WIRELESS:
 673                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 674                 break;
 675         case ACER_CAP_BLUETOOTH:
 676                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 677                 break;
 678         case ACER_CAP_BRIGHTNESS:
 679                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 680                 break;
 681         case ACER_CAP_THREEG:
 682                 method_id = ACER_WMID_GET_THREEG_METHODID;
 683                 break;
 684         case ACER_CAP_MAILLED:
 685                 if (quirks->mailled == 1) {
 686                         ec_read(0x9f, &tmp);
 687                         *value = tmp & 0x1;
 688                         return 0;
 689                 }
 690         default:
 691                 return AE_BAD_ADDRESS;
 692         }
 693         status = WMI_execute_u32(method_id, 0, &result);
 694
 695         if (ACPI_SUCCESS(status))
 696                 *value = (u8)result;
 697
 698         return status;
 699 }
 700
 701 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 702 {
 703         u32 method_id = 0;
 704         char param;
 705
 706         switch (cap) {
 707         case ACER_CAP_BRIGHTNESS:
 708                 if (value > max_brightness)
 709                         return AE_BAD_PARAMETER;
 710                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 711                 break;
 712         case ACER_CAP_WIRELESS:
 713                 if (value > 1)
 714                         return AE_BAD_PARAMETER;
 715                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 716                 break;
 717         case ACER_CAP_BLUETOOTH:
 718                 if (value > 1)
 719                         return AE_BAD_PARAMETER;
 720                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 721                 break;
 722         case ACER_CAP_THREEG:
 723                 if (value > 1)
 724                         return AE_BAD_PARAMETER;
 725                 method_id = ACER_WMID_SET_THREEG_METHODID;
 726                 break;
 727         case ACER_CAP_MAILLED:
 728                 if (value > 1)
 729                         return AE_BAD_PARAMETER;
 730                 if (quirks->mailled == 1) {
 731                         param = value ? 0x92 : 0x93;
 732                         i8042_command(&param, 0x1059);
 733                         return 0;
 734                 }
 735                 break;
 736         default:
 737                 return AE_BAD_ADDRESS;
 738         }
 739         return WMI_execute_u32(method_id, (u32)value, NULL);
 740 }
 741
 742 static acpi_status WMID_set_capabilities(void)
 743 {
 744         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 745         union acpi_object *obj;
 746         acpi_status status;
 747         u32 devices;
 748
 749         status = wmi_query_block(WMID_GUID2, 1, &out);
 750         if (ACPI_FAILURE(status))
 751                 return status;
 752
 753         obj = (union acpi_object *) out.pointer;
 754         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 755                 obj->buffer.length == sizeof(u32)) {
 756                 devices = *((u32 *) obj->buffer.pointer);
 757         } else {
 758                 return AE_ERROR;
 759         }
 760
 761         /* Not sure on the meaning of the relevant bits yet to detect these */
 762         interface->capability |= ACER_CAP_WIRELESS;
 763         interface->capability |= ACER_CAP_THREEG;
 764
 765         /* WMID always provides brightness methods */
 766         interface->capability |= ACER_CAP_BRIGHTNESS;
 767
 768         if (devices & 0x10)
 769                 interface->capability |= ACER_CAP_BLUETOOTH;
 770
 771         if (!(devices & 0x20))
 772                 max_brightness = 0x9;
 773
 774         return status;
 775 }
 776
 777 static struct wmi_interface wmid_interface = {
 778         .type = ACER_WMID,
 779 };
 780
 781 /*
 782  * Generic Device (interface-independent)
 783  */
 784
 785 static acpi_status get_u32(u32 *value, u32 cap)
 786 {
 787         acpi_status status = AE_BAD_ADDRESS;
 788
 789         switch (interface->type) {
 790         case ACER_AMW0:
 791                 status = AMW0_get_u32(value, cap, interface);
 792                 break;
 793         case ACER_AMW0_V2:
 794                 if (cap == ACER_CAP_MAILLED) {
 795                         status = AMW0_get_u32(value, cap, interface);
 796                         break;
 797                 }
 798         case ACER_WMID:
 799                 status = WMID_get_u32(value, cap, interface);
 800                 break;
 801         }
 802
 803         return status;
 804 }
 805
 806 static acpi_status set_u32(u32 value, u32 cap)
 807 {
 808         if (interface->capability & cap) {
 809                 switch (interface->type) {
 810                 case ACER_AMW0:
 811                         return AMW0_set_u32(value, cap, interface);
 812                 case ACER_AMW0_V2:
 813                 case ACER_WMID:
 814                         return WMID_set_u32(value, cap, interface);
 815                 default:
 816                         return AE_BAD_PARAMETER;
 817                 }
 818         }
 819         return AE_BAD_PARAMETER;
 820 }
 821
 822 static void __init acer_commandline_init(void)
 823 {
 824         /*
 825          * These will all fail silently if the value given is invalid, or the
 826          * capability isn't available on the given interface
 827          */
 828         set_u32(mailled, ACER_CAP_MAILLED);
 829         set_u32(wireless, ACER_CAP_WIRELESS);
 830         set_u32(bluetooth, ACER_CAP_BLUETOOTH);
 831         set_u32(threeg, ACER_CAP_THREEG);
 832         set_u32(brightness, ACER_CAP_BRIGHTNESS);
 833 }
 834
 835 /*
 836  * LED device (Mail LED only, no other LEDs known yet)
 837  */
 838 static void mail_led_set(struct led_classdev *led_cdev,
 839 enum led_brightness value)
 840 {
 841         set_u32(value, ACER_CAP_MAILLED);
 842 }
 843
 844 static struct led_classdev mail_led = {
 845         .name = "acer-wmi::mail",
 846         .brightness_set = mail_led_set,
 847 };
 848
 849 static int __devinit acer_led_init(struct device *dev)
 850 {
 851         return led_classdev_register(dev, &mail_led);
 852 }
 853
 854 static void acer_led_exit(void)
 855 {
 856         led_classdev_unregister(&mail_led);
 857 }
 858
 859 /*
 860  * Backlight device
 861  */
 862 static struct backlight_device *acer_backlight_device;
 863
 864 static int read_brightness(struct backlight_device *bd)
 865 {
 866         u32 value;
 867         get_u32(&value, ACER_CAP_BRIGHTNESS);
 868         return value;
 869 }
 870
 871 static int update_bl_status(struct backlight_device *bd)
 872 {
 873         int intensity = bd->props.brightness;
 874
 875         if (bd->props.power != FB_BLANK_UNBLANK)
 876                 intensity = 0;
 877         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
 878                 intensity = 0;
 879
 880         set_u32(intensity, ACER_CAP_BRIGHTNESS);
 881
 882         return 0;
 883 }
 884
 885 static struct backlight_ops acer_bl_ops = {
 886         .get_brightness = read_brightness,
 887         .update_status = update_bl_status,
 888 };
 889
 890 static int __devinit acer_backlight_init(struct device *dev)
 891 {
 892         struct backlight_device *bd;
 893
 894         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
 895         if (IS_ERR(bd)) {
 896                 printk(ACER_ERR "Could not register Acer backlight device\n");
 897                 acer_backlight_device = NULL;
 898                 return PTR_ERR(bd);
 899         }
 900
 901         acer_backlight_device = bd;
 902
 903         bd->props.power = FB_BLANK_UNBLANK;
 904         bd->props.brightness = max_brightness;
 905         bd->props.max_brightness = max_brightness;
 906         backlight_update_status(bd);
 907         return 0;
 908 }
 909
 910 static void acer_backlight_exit(void)
 911 {
 912         backlight_device_unregister(acer_backlight_device);
 913 }
 914
 915 /*
 916  * Read/ write bool sysfs macro
 917  */
 918 #define show_set_bool(value, cap) \
 919 static ssize_t \
 920 show_bool_##value(struct device *dev, struct device_attribute *attr, \
 921         char *buf) \
 922 { \
 923         u32 result; \
 924         acpi_status status = get_u32(&result, cap); \
 925         if (ACPI_SUCCESS(status)) \
 926                 return sprintf(buf, "%u\n", result); \
 927         return sprintf(buf, "Read error\n"); \
 928 } \
 929 \
 930 static ssize_t \
 931 set_bool_##value(struct device *dev, struct device_attribute *attr, \
 932         const char *buf, size_t count) \
 933 { \
 934         u32 tmp = simple_strtoul(buf, NULL, 10); \
 935         acpi_status status = set_u32(tmp, cap); \
 936                 if (ACPI_FAILURE(status)) \
 937                         return -EINVAL; \
 938         return count; \
 939 } \
 940 static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
 941         show_bool_##value, set_bool_##value);
 942
 943 show_set_bool(wireless, ACER_CAP_WIRELESS);
 944 show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
 945 show_set_bool(threeg, ACER_CAP_THREEG);
 946
 947 /*
 948  * Read interface sysfs macro
 949  */
 950 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
 951         char *buf)
 952 {
 953         switch (interface->type) {
 954         case ACER_AMW0:
 955                 return sprintf(buf, "AMW0\n");
 956         case ACER_AMW0_V2:
 957                 return sprintf(buf, "AMW0 v2\n");
 958         case ACER_WMID:
 959                 return sprintf(buf, "WMID\n");
 960         default:
 961                 return sprintf(buf, "Error!\n");
 962         }
 963 }
 964
 965 static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
 966         show_interface, NULL);
 967
 968 /*
 969  * debugfs functions
 970  */
 971 static u32 get_wmid_devices(void)
 972 {
 973         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 974         union acpi_object *obj;
 975         acpi_status status;
 976
 977         status = wmi_query_block(WMID_GUID2, 1, &out);
 978         if (ACPI_FAILURE(status))
 979                 return 0;
 980
 981         obj = (union acpi_object *) out.pointer;
 982         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 983                 obj->buffer.length == sizeof(u32)) {
 984                 return *((u32 *) obj->buffer.pointer);
 985         } else {
 986                 return 0;
 987         }
 988 }
 989
 990 /*
 991  * Platform device
 992  */
 993 static int __devinit acer_platform_probe(struct platform_device *device)
 994 {
 995         int err;
 996
 997         if (has_cap(ACER_CAP_MAILLED)) {
 998                 err = acer_led_init(&device->dev);
 999                 if (err)
1000                         goto error_mailled;
1001         }
1002
1003         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1004                 err = acer_backlight_init(&device->dev);
1005                 if (err)
1006                         goto error_brightness;
1007         }
1008
1009         return 0;
1010
1011 error_brightness:
1012         acer_led_exit();
1013 error_mailled:
1014         return err;
1015 }
1016
1017 static int acer_platform_remove(struct platform_device *device)
1018 {
1019         if (has_cap(ACER_CAP_MAILLED))
1020                 acer_led_exit();
1021         if (has_cap(ACER_CAP_BRIGHTNESS))
1022                 acer_backlight_exit();
1023         return 0;
1024 }
1025
1026 static int acer_platform_suspend(struct platform_device *dev,
1027 pm_message_t state)
1028 {
1029         u32 value;
1030         struct acer_data *data = &interface->data;
1031
1032         if (!data)
1033                 return -ENOMEM;
1034
1035         if (has_cap(ACER_CAP_WIRELESS)) {
1036                 get_u32(&value, ACER_CAP_WIRELESS);
1037                 data->wireless = value;
1038         }
1039
1040         if (has_cap(ACER_CAP_BLUETOOTH)) {
1041                 get_u32(&value, ACER_CAP_BLUETOOTH);
1042                 data->bluetooth = value;
1043         }
1044
1045         if (has_cap(ACER_CAP_MAILLED)) {
1046                 get_u32(&value, ACER_CAP_MAILLED);
1047                 data->mailled = value;
1048         }
1049
1050         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1051                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1052                 data->brightness = value;
1053         }
1054
1055         return 0;
1056 }
1057
1058 static int acer_platform_resume(struct platform_device *device)
1059 {
1060         struct acer_data *data = &interface->data;
1061
1062         if (!data)
1063                 return -ENOMEM;
1064
1065         if (has_cap(ACER_CAP_WIRELESS))
1066                 set_u32(data->wireless, ACER_CAP_WIRELESS);
1067
1068         if (has_cap(ACER_CAP_BLUETOOTH))
1069                 set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
1070
1071         if (has_cap(ACER_CAP_THREEG))
1072                 set_u32(data->threeg, ACER_CAP_THREEG);
1073
1074         if (has_cap(ACER_CAP_MAILLED))
1075                 set_u32(data->mailled, ACER_CAP_MAILLED);
1076
1077         if (has_cap(ACER_CAP_BRIGHTNESS))
1078                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1079
1080         return 0;
1081 }
1082
1083 static struct platform_driver acer_platform_driver = {
1084         .driver = {
1085                 .name = "acer-wmi",
1086                 .owner = THIS_MODULE,
1087         },
1088         .probe = acer_platform_probe,
1089         .remove = acer_platform_remove,
1090         .suspend = acer_platform_suspend,
1091         .resume = acer_platform_resume,
1092 };
1093
1094 static struct platform_device *acer_platform_device;
1095
1096 static int remove_sysfs(struct platform_device *device)
1097 {
1098         if (has_cap(ACER_CAP_WIRELESS))
1099                 device_remove_file(&device->dev, &dev_attr_wireless);
1100
1101         if (has_cap(ACER_CAP_BLUETOOTH))
1102                 device_remove_file(&device->dev, &dev_attr_bluetooth);
1103
1104         if (has_cap(ACER_CAP_THREEG))
1105                 device_remove_file(&device->dev, &dev_attr_threeg);
1106
1107         device_remove_file(&device->dev, &dev_attr_interface);
1108
1109         return 0;
1110 }
1111
1112 static int create_sysfs(void)
1113 {
1114         int retval = -ENOMEM;
1115
1116         if (has_cap(ACER_CAP_WIRELESS)) {
1117                 retval = device_create_file(&acer_platform_device->dev,
1118                         &dev_attr_wireless);
1119                 if (retval)
1120                         goto error_sysfs;
1121         }
1122
1123         if (has_cap(ACER_CAP_BLUETOOTH)) {
1124                 retval = device_create_file(&acer_platform_device->dev,
1125                         &dev_attr_bluetooth);
1126                 if (retval)
1127                         goto error_sysfs;
1128         }
1129
1130         if (has_cap(ACER_CAP_THREEG)) {
1131                 retval = device_create_file(&acer_platform_device->dev,
1132                         &dev_attr_threeg);
1133                 if (retval)
1134                         goto error_sysfs;
1135         }
1136
1137         retval = device_create_file(&acer_platform_device->dev,
1138                 &dev_attr_interface);
1139         if (retval)
1140                 goto error_sysfs;
1141
1142         return 0;
1143
1144 error_sysfs:
1145                 remove_sysfs(acer_platform_device);
1146         return retval;
1147 }
1148
1149 static void remove_debugfs(void)
1150 {
1151         debugfs_remove(interface->debug.devices);
1152         debugfs_remove(interface->debug.root);
1153 }
1154
1155 static int create_debugfs(void)
1156 {
1157         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1158         if (!interface->debug.root) {
1159                 printk(ACER_ERR "Failed to create debugfs directory");
1160                 return -ENOMEM;
1161         }
1162
1163         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1164                                         interface->debug.root,
1165                                         &interface->debug.wmid_devices);
1166         if (!interface->debug.devices)
1167                 goto error_debugfs;
1168
1169         return 0;
1170
1171 error_debugfs:
1172                 remove_debugfs();
1173         return -ENOMEM;
1174 }
1175
1176 static int __init acer_wmi_init(void)
1177 {
1178         int err;
1179
1180         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
1181                         ACER_WMI_VERSION);
1182
1183         find_quirks();
1184
1185         /*
1186          * Detect which ACPI-WMI interface we're using.
1187          */
1188         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1189                 interface = &AMW0_V2_interface;
1190
1191         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1192                 interface = &wmid_interface;
1193
1194         if (wmi_has_guid(WMID_GUID2) && interface) {
1195                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1196                         printk(ACER_ERR "Unable to detect available WMID "
1197                                         "devices\n");
1198                         return -ENODEV;
1199                 }
1200         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1201                 printk(ACER_ERR "No WMID device detection method found\n");
1202                 return -ENODEV;
1203         }
1204
1205         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1206                 interface = &AMW0_interface;
1207
1208                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1209                         printk(ACER_ERR "Unable to detect available AMW0 "
1210                                         "devices\n");
1211                         return -ENODEV;
1212                 }
1213         }
1214
1215         if (wmi_has_guid(AMW0_GUID1))
1216                 AMW0_find_mailled();
1217
1218         if (!interface) {
1219                 printk(ACER_ERR "No or unsupported WMI interface, unable to "
1220                                 "load\n");
1221                 return -ENODEV;
1222         }
1223
1224         if (platform_driver_register(&acer_platform_driver)) {
1225                 printk(ACER_ERR "Unable to register platform driver.\n");
1226                 goto error_platform_register;
1227         }
1228         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1229         platform_device_add(acer_platform_device);
1230
1231         err = create_sysfs();
1232         if (err)
1233                 return err;
1234
1235         if (wmi_has_guid(WMID_GUID2)) {
1236                 interface->debug.wmid_devices = get_wmid_devices();
1237                 err = create_debugfs();
1238                 if (err)
1239                         return err;
1240         }
1241
1242         /* Override any initial settings with values from the commandline */
1243         acer_commandline_init();
1244
1245         return 0;
1246
1247 error_platform_register:
1248         return -ENODEV;
1249 }
1250
1251 static void __exit acer_wmi_exit(void)
1252 {
1253         remove_sysfs(acer_platform_device);
1254         platform_device_del(acer_platform_device);
1255         platform_driver_unregister(&acer_platform_driver);
1256
1257         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1258         return;
1259 }
1260
1261 module_init(acer_wmi_init);
1262 module_exit(acer_wmi_exit);