git.oblomov.eu Git - linux-2.6/blob - 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         u8 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_travelmate_2490 = {
 202         .mailled = 1,
 203 };
 204
 205 /* This AMW0 laptop has no bluetooth */
 206 static struct quirk_entry quirk_medion_md_98300 = {
 207         .wireless = 1,
 208 };
 209
 210 static struct dmi_system_id acer_quirks[] = {
 211         {
 212                 .callback = dmi_matched,
 213                 .ident = "Acer Aspire 3100",
 214                 .matches = {
 215                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 216                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 217                 },
 218                 .driver_data = &quirk_acer_travelmate_2490,
 219         },
 220         {
 221                 .callback = dmi_matched,
 222                 .ident = "Acer Aspire 5100",
 223                 .matches = {
 224                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 225                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 226                 },
 227                 .driver_data = &quirk_acer_travelmate_2490,
 228         },
 229         {
 230                 .callback = dmi_matched,
 231                 .ident = "Acer Aspire 5630",
 232                 .matches = {
 233                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 234                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 235                 },
 236                 .driver_data = &quirk_acer_travelmate_2490,
 237         },
 238         {
 239                 .callback = dmi_matched,
 240                 .ident = "Acer Aspire 5650",
 241                 .matches = {
 242                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 243                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 244                 },
 245                 .driver_data = &quirk_acer_travelmate_2490,
 246         },
 247         {
 248                 .callback = dmi_matched,
 249                 .ident = "Acer Aspire 5680",
 250                 .matches = {
 251                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 252                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 253                 },
 254                 .driver_data = &quirk_acer_travelmate_2490,
 255         },
 256         {
 257                 .callback = dmi_matched,
 258                 .ident = "Acer Aspire 9110",
 259                 .matches = {
 260                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 261                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 262                 },
 263                 .driver_data = &quirk_acer_travelmate_2490,
 264         },
 265         {
 266                 .callback = dmi_matched,
 267                 .ident = "Acer TravelMate 2490",
 268                 .matches = {
 269                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 270                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 271                 },
 272                 .driver_data = &quirk_acer_travelmate_2490,
 273         },
 274         {
 275                 .callback = dmi_matched,
 276                 .ident = "Acer TravelMate 4200",
 277                 .matches = {
 278                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 279                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 280                 },
 281                 .driver_data = &quirk_acer_travelmate_2490,
 282         },
 283         {
 284                 .callback = dmi_matched,
 285                 .ident = "Medion MD 98300",
 286                 .matches = {
 287                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 288                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 289                 },
 290                 .driver_data = &quirk_medion_md_98300,
 291         },
 292         {}
 293 };
 294
 295 /* Find which quirks are needed for a particular vendor/ model pair */
 296 static void find_quirks(void)
 297 {
 298         if (!force_series) {
 299                 dmi_check_system(acer_quirks);
 300         } else if (force_series == 2490) {
 301                 quirks = &quirk_acer_travelmate_2490;
 302         }
 303
 304         if (quirks == NULL)
 305                 quirks = &quirk_unknown;
 306
 307         set_quirks();
 308 }
 309
 310 /*
 311  * General interface convenience methods
 312  */
 313
 314 static bool has_cap(u32 cap)
 315 {
 316         if ((interface->capability & cap) != 0)
 317                 return 1;
 318
 319         return 0;
 320 }
 321
 322 /*
 323  * AMW0 (V1) interface
 324  */
 325 struct wmab_args {
 326         u32 eax;
 327         u32 ebx;
 328         u32 ecx;
 329         u32 edx;
 330 };
 331
 332 struct wmab_ret {
 333         u32 eax;
 334         u32 ebx;
 335         u32 ecx;
 336         u32 edx;
 337         u32 eex;
 338 };
 339
 340 static acpi_status wmab_execute(struct wmab_args *regbuf,
 341 struct acpi_buffer *result)
 342 {
 343         struct acpi_buffer input;
 344         acpi_status status;
 345         input.length = sizeof(struct wmab_args);
 346         input.pointer = (u8 *)regbuf;
 347
 348         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 349
 350         return status;
 351 }
 352
 353 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 354 struct wmi_interface *iface)
 355 {
 356         int err;
 357         u8 result;
 358
 359         switch (cap) {
 360         case ACER_CAP_MAILLED:
 361                 switch (quirks->mailled) {
 362                 default:
 363                         err = ec_read(0xA, &result);
 364                         if (err)
 365                                 return AE_ERROR;
 366                         *value = (result >> 7) & 0x1;
 367                         return AE_OK;
 368                 }
 369                 break;
 370         case ACER_CAP_WIRELESS:
 371                 switch (quirks->wireless) {
 372                 case 1:
 373                         err = ec_read(0x7B, &result);
 374                         if (err)
 375                                 return AE_ERROR;
 376                         *value = result & 0x1;
 377                         return AE_OK;
 378                 default:
 379                         err = ec_read(0xA, &result);
 380                         if (err)
 381                                 return AE_ERROR;
 382                         *value = (result >> 2) & 0x1;
 383                         return AE_OK;
 384                 }
 385                 break;
 386         case ACER_CAP_BLUETOOTH:
 387                 switch (quirks->bluetooth) {
 388                 default:
 389                         err = ec_read(0xA, &result);
 390                         if (err)
 391                                 return AE_ERROR;
 392                         *value = (result >> 4) & 0x1;
 393                         return AE_OK;
 394                 }
 395                 break;
 396         case ACER_CAP_BRIGHTNESS:
 397                 switch (quirks->brightness) {
 398                 default:
 399                         err = ec_read(0x83, &result);
 400                         if (err)
 401                                 return AE_ERROR;
 402                         *value = result;
 403                         return AE_OK;
 404                 }
 405                 break;
 406         default:
 407                 return AE_BAD_ADDRESS;
 408         }
 409         return AE_OK;
 410 }
 411
 412 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 413 {
 414         struct wmab_args args;
 415
 416         args.eax = ACER_AMW0_WRITE;
 417         args.ebx = value ? (1<<8) : 0;
 418         args.ecx = args.edx = 0;
 419
 420         switch (cap) {
 421         case ACER_CAP_MAILLED:
 422                 if (value > 1)
 423                         return AE_BAD_PARAMETER;
 424                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 425                 break;
 426         case ACER_CAP_WIRELESS:
 427                 if (value > 1)
 428                         return AE_BAD_PARAMETER;
 429                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 430                 break;
 431         case ACER_CAP_BLUETOOTH:
 432                 if (value > 1)
 433                         return AE_BAD_PARAMETER;
 434                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 435                 break;
 436         case ACER_CAP_BRIGHTNESS:
 437                 if (value > max_brightness)
 438                         return AE_BAD_PARAMETER;
 439                 switch (quirks->brightness) {
 440                 default:
 441                         return ec_write(0x83, value);
 442                         break;
 443                 }
 444         default:
 445                 return AE_BAD_ADDRESS;
 446         }
 447
 448         /* Actually do the set */
 449         return wmab_execute(&args, NULL);
 450 }
 451
 452 static acpi_status AMW0_find_mailled(void)
 453 {
 454         struct wmab_args args;
 455         struct wmab_ret ret;
 456         acpi_status status = AE_OK;
 457         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 458         union acpi_object *obj;
 459
 460         args.eax = 0x86;
 461         args.ebx = args.ecx = args.edx = 0;
 462
 463         status = wmab_execute(&args, &out);
 464         if (ACPI_FAILURE(status))
 465                 return status;
 466
 467         obj = (union acpi_object *) out.pointer;
 468         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 469         obj->buffer.length == sizeof(struct wmab_ret)) {
 470                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 471         } else {
 472                 return AE_ERROR;
 473         }
 474
 475         if (ret.eex & 0x1)
 476                 interface->capability |= ACER_CAP_MAILLED;
 477
 478         kfree(out.pointer);
 479
 480         return AE_OK;
 481 }
 482
 483 static acpi_status AMW0_set_capabilities(void)
 484 {
 485         struct wmab_args args;
 486         struct wmab_ret ret;
 487         acpi_status status = AE_OK;
 488         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 489         union acpi_object *obj;
 490
 491         args.eax = ACER_AMW0_WRITE;
 492         args.ecx = args.edx = 0;
 493
 494         args.ebx = 0xa2 << 8;
 495         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 496
 497         status = wmab_execute(&args, &out);
 498         if (ACPI_FAILURE(status))
 499                 return status;
 500
 501         obj = (union acpi_object *) out.pointer;
 502         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 503         obj->buffer.length == sizeof(struct wmab_ret)) {
 504                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 505         } else {
 506                 return AE_ERROR;
 507         }
 508
 509         if (ret.eax & 0x1)
 510                 interface->capability |= ACER_CAP_WIRELESS;
 511
 512         args.ebx = 2 << 8;
 513         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 514
 515         status = wmab_execute(&args, &out);
 516         if (ACPI_FAILURE(status))
 517                 return status;
 518
 519         obj = (union acpi_object *) out.pointer;
 520         if (obj && obj->type == ACPI_TYPE_BUFFER
 521         && obj->buffer.length == sizeof(struct wmab_ret)) {
 522                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 523         } else {
 524                 return AE_ERROR;
 525         }
 526
 527         if (ret.eax & 0x1)
 528                 interface->capability |= ACER_CAP_BLUETOOTH;
 529
 530         kfree(out.pointer);
 531
 532         /*
 533          * This appears to be safe to enable, since all Wistron based laptops
 534          * appear to use the same EC register for brightness, even if they
 535          * differ for wireless, etc
 536          */
 537         interface->capability |= ACER_CAP_BRIGHTNESS;
 538
 539         return AE_OK;
 540 }
 541
 542 static struct wmi_interface AMW0_interface = {
 543         .type = ACER_AMW0,
 544 };
 545
 546 static struct wmi_interface AMW0_V2_interface = {
 547         .type = ACER_AMW0_V2,
 548 };
 549
 550 /*
 551  * New interface (The WMID interface)
 552  */
 553 static acpi_status
 554 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 555 {
 556         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 557         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 558         union acpi_object *obj;
 559         u32 tmp;
 560         acpi_status status;
 561
 562         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 563
 564         if (ACPI_FAILURE(status))
 565                 return status;
 566
 567         obj = (union acpi_object *) result.pointer;
 568         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 569                 obj->buffer.length == sizeof(u32)) {
 570                 tmp = *((u32 *) obj->buffer.pointer);
 571         } else {
 572                 tmp = 0;
 573         }
 574
 575         if (out)
 576                 *out = tmp;
 577
 578         kfree(result.pointer);
 579
 580         return status;
 581 }
 582
 583 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 584 struct wmi_interface *iface)
 585 {
 586         acpi_status status;
 587         u8 tmp;
 588         u32 result, method_id = 0;
 589
 590         switch (cap) {
 591         case ACER_CAP_WIRELESS:
 592                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 593                 break;
 594         case ACER_CAP_BLUETOOTH:
 595                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 596                 break;
 597         case ACER_CAP_BRIGHTNESS:
 598                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 599                 break;
 600         case ACER_CAP_THREEG:
 601                 method_id = ACER_WMID_GET_THREEG_METHODID;
 602                 break;
 603         case ACER_CAP_MAILLED:
 604                 if (quirks->mailled == 1) {
 605                         ec_read(0x9f, &tmp);
 606                         *value = tmp & 0x1;
 607                         return 0;
 608                 }
 609         default:
 610                 return AE_BAD_ADDRESS;
 611         }
 612         status = WMI_execute_u32(method_id, 0, &result);
 613
 614         if (ACPI_SUCCESS(status))
 615                 *value = (u8)result;
 616
 617         return status;
 618 }
 619
 620 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 621 {
 622         u32 method_id = 0;
 623         char param;
 624
 625         switch (cap) {
 626         case ACER_CAP_BRIGHTNESS:
 627                 if (value > max_brightness)
 628                         return AE_BAD_PARAMETER;
 629                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 630                 break;
 631         case ACER_CAP_WIRELESS:
 632                 if (value > 1)
 633                         return AE_BAD_PARAMETER;
 634                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 635                 break;
 636         case ACER_CAP_BLUETOOTH:
 637                 if (value > 1)
 638                         return AE_BAD_PARAMETER;
 639                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 640                 break;
 641         case ACER_CAP_THREEG:
 642                 if (value > 1)
 643                         return AE_BAD_PARAMETER;
 644                 method_id = ACER_WMID_SET_THREEG_METHODID;
 645                 break;
 646         case ACER_CAP_MAILLED:
 647                 if (value > 1)
 648                         return AE_BAD_PARAMETER;
 649                 if (quirks->mailled == 1) {
 650                         param = value ? 0x92 : 0x93;
 651                         i8042_command(&param, 0x1059);
 652                         return 0;
 653                 }
 654                 break;
 655         default:
 656                 return AE_BAD_ADDRESS;
 657         }
 658         return WMI_execute_u32(method_id, (u32)value, NULL);
 659 }
 660
 661 static acpi_status WMID_set_capabilities(void)
 662 {
 663         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 664         union acpi_object *obj;
 665         acpi_status status;
 666         u32 devices;
 667
 668         status = wmi_query_block(WMID_GUID2, 1, &out);
 669         if (ACPI_FAILURE(status))
 670                 return status;
 671
 672         obj = (union acpi_object *) out.pointer;
 673         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 674                 obj->buffer.length == sizeof(u32)) {
 675                 devices = *((u32 *) obj->buffer.pointer);
 676         } else {
 677                 return AE_ERROR;
 678         }
 679
 680         /* Not sure on the meaning of the relevant bits yet to detect these */
 681         interface->capability |= ACER_CAP_WIRELESS;
 682         interface->capability |= ACER_CAP_THREEG;
 683
 684         /* WMID always provides brightness methods */
 685         interface->capability |= ACER_CAP_BRIGHTNESS;
 686
 687         if (devices & 0x10)
 688                 interface->capability |= ACER_CAP_BLUETOOTH;
 689
 690         if (!(devices & 0x20))
 691                 max_brightness = 0x9;
 692
 693         return status;
 694 }
 695
 696 static struct wmi_interface wmid_interface = {
 697         .type = ACER_WMID,
 698 };
 699
 700 /*
 701  * Generic Device (interface-independent)
 702  */
 703
 704 static acpi_status get_u32(u32 *value, u32 cap)
 705 {
 706         acpi_status status = AE_BAD_ADDRESS;
 707
 708         switch (interface->type) {
 709         case ACER_AMW0:
 710                 status = AMW0_get_u32(value, cap, interface);
 711                 break;
 712         case ACER_AMW0_V2:
 713                 if (cap == ACER_CAP_MAILLED) {
 714                         status = AMW0_get_u32(value, cap, interface);
 715                         break;
 716                 }
 717         case ACER_WMID:
 718                 status = WMID_get_u32(value, cap, interface);
 719                 break;
 720         }
 721
 722         return status;
 723 }
 724
 725 static acpi_status set_u32(u32 value, u32 cap)
 726 {
 727         if (interface->capability & cap) {
 728                 switch (interface->type) {
 729                 case ACER_AMW0:
 730                         return AMW0_set_u32(value, cap, interface);
 731                 case ACER_AMW0_V2:
 732                 case ACER_WMID:
 733                         return WMID_set_u32(value, cap, interface);
 734                 default:
 735                         return AE_BAD_PARAMETER;
 736                 }
 737         }
 738         return AE_BAD_PARAMETER;
 739 }
 740
 741 static void __init acer_commandline_init(void)
 742 {
 743         /*
 744          * These will all fail silently if the value given is invalid, or the
 745          * capability isn't available on the given interface
 746          */
 747         set_u32(mailled, ACER_CAP_MAILLED);
 748         set_u32(wireless, ACER_CAP_WIRELESS);
 749         set_u32(bluetooth, ACER_CAP_BLUETOOTH);
 750         set_u32(threeg, ACER_CAP_THREEG);
 751         set_u32(brightness, ACER_CAP_BRIGHTNESS);
 752 }
 753
 754 /*
 755  * LED device (Mail LED only, no other LEDs known yet)
 756  */
 757 static void mail_led_set(struct led_classdev *led_cdev,
 758 enum led_brightness value)
 759 {
 760         set_u32(value, ACER_CAP_MAILLED);
 761 }
 762
 763 static struct led_classdev mail_led = {
 764         .name = "acer-mail:green",
 765         .brightness_set = mail_led_set,
 766 };
 767
 768 static int __init acer_led_init(struct device *dev)
 769 {
 770         return led_classdev_register(dev, &mail_led);
 771 }
 772
 773 static void acer_led_exit(void)
 774 {
 775         led_classdev_unregister(&mail_led);
 776 }
 777
 778 /*
 779  * Backlight device
 780  */
 781 static struct backlight_device *acer_backlight_device;
 782
 783 static int read_brightness(struct backlight_device *bd)
 784 {
 785         u32 value;
 786         get_u32(&value, ACER_CAP_BRIGHTNESS);
 787         return value;
 788 }
 789
 790 static int update_bl_status(struct backlight_device *bd)
 791 {
 792         set_u32(bd->props.brightness, ACER_CAP_BRIGHTNESS);
 793         return 0;
 794 }
 795
 796 static struct backlight_ops acer_bl_ops = {
 797         .get_brightness = read_brightness,
 798         .update_status = update_bl_status,
 799 };
 800
 801 static int __init acer_backlight_init(struct device *dev)
 802 {
 803         struct backlight_device *bd;
 804
 805         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
 806         if (IS_ERR(bd)) {
 807                 printk(ACER_ERR "Could not register Acer backlight device\n");
 808                 acer_backlight_device = NULL;
 809                 return PTR_ERR(bd);
 810         }
 811
 812         acer_backlight_device = bd;
 813
 814         bd->props.max_brightness = max_brightness;
 815         bd->props.brightness = read_brightness(NULL);
 816         backlight_update_status(bd);
 817         return 0;
 818 }
 819
 820 static void __exit acer_backlight_exit(void)
 821 {
 822         backlight_device_unregister(acer_backlight_device);
 823 }
 824
 825 /*
 826  * Read/ write bool sysfs macro
 827  */
 828 #define show_set_bool(value, cap) \
 829 static ssize_t \
 830 show_bool_##value(struct device *dev, struct device_attribute *attr, \
 831         char *buf) \
 832 { \
 833         u32 result; \
 834         acpi_status status = get_u32(&result, cap); \
 835         if (ACPI_SUCCESS(status)) \
 836                 return sprintf(buf, "%u\n", result); \
 837         return sprintf(buf, "Read error\n"); \
 838 } \
 839 \
 840 static ssize_t \
 841 set_bool_##value(struct device *dev, struct device_attribute *attr, \
 842         const char *buf, size_t count) \
 843 { \
 844         u32 tmp = simple_strtoul(buf, NULL, 10); \
 845         acpi_status status = set_u32(tmp, cap); \
 846                 if (ACPI_FAILURE(status)) \
 847                         return -EINVAL; \
 848         return count; \
 849 } \
 850 static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
 851         show_bool_##value, set_bool_##value);
 852
 853 show_set_bool(wireless, ACER_CAP_WIRELESS);
 854 show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
 855 show_set_bool(threeg, ACER_CAP_THREEG);
 856
 857 /*
 858  * Read interface sysfs macro
 859  */
 860 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
 861         char *buf)
 862 {
 863         switch (interface->type) {
 864         case ACER_AMW0:
 865                 return sprintf(buf, "AMW0\n");
 866         case ACER_AMW0_V2:
 867                 return sprintf(buf, "AMW0 v2\n");
 868         case ACER_WMID:
 869                 return sprintf(buf, "WMID\n");
 870         default:
 871                 return sprintf(buf, "Error!\n");
 872         }
 873 }
 874
 875 static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
 876         show_interface, NULL);
 877
 878 /*
 879  * Platform device
 880  */
 881 static int __devinit acer_platform_probe(struct platform_device *device)
 882 {
 883         int err;
 884
 885         if (has_cap(ACER_CAP_MAILLED)) {
 886                 err = acer_led_init(&device->dev);
 887                 if (err)
 888                         goto error_mailled;
 889         }
 890
 891         if (has_cap(ACER_CAP_BRIGHTNESS)) {
 892                 err = acer_backlight_init(&device->dev);
 893                 if (err)
 894                         goto error_brightness;
 895         }
 896
 897         return 0;
 898
 899 error_brightness:
 900         acer_led_exit();
 901 error_mailled:
 902         return err;
 903 }
 904
 905 static int acer_platform_remove(struct platform_device *device)
 906 {
 907         if (has_cap(ACER_CAP_MAILLED))
 908                 acer_led_exit();
 909         if (has_cap(ACER_CAP_BRIGHTNESS))
 910                 acer_backlight_exit();
 911         return 0;
 912 }
 913
 914 static int acer_platform_suspend(struct platform_device *dev,
 915 pm_message_t state)
 916 {
 917         u32 value;
 918         struct acer_data *data = &interface->data;
 919
 920         if (!data)
 921                 return -ENOMEM;
 922
 923         if (has_cap(ACER_CAP_WIRELESS)) {
 924                 get_u32(&value, ACER_CAP_WIRELESS);
 925                 data->wireless = value;
 926         }
 927
 928         if (has_cap(ACER_CAP_BLUETOOTH)) {
 929                 get_u32(&value, ACER_CAP_BLUETOOTH);
 930                 data->bluetooth = value;
 931         }
 932
 933         if (has_cap(ACER_CAP_MAILLED)) {
 934                 get_u32(&value, ACER_CAP_MAILLED);
 935                 data->mailled = value;
 936         }
 937
 938         if (has_cap(ACER_CAP_BRIGHTNESS)) {
 939                 get_u32(&value, ACER_CAP_BRIGHTNESS);
 940                 data->brightness = value;
 941         }
 942
 943         return 0;
 944 }
 945
 946 static int acer_platform_resume(struct platform_device *device)
 947 {
 948         struct acer_data *data = &interface->data;
 949
 950         if (!data)
 951                 return -ENOMEM;
 952
 953         if (has_cap(ACER_CAP_WIRELESS))
 954                 set_u32(data->wireless, ACER_CAP_WIRELESS);
 955
 956         if (has_cap(ACER_CAP_BLUETOOTH))
 957                 set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
 958
 959         if (has_cap(ACER_CAP_THREEG))
 960                 set_u32(data->threeg, ACER_CAP_THREEG);
 961
 962         if (has_cap(ACER_CAP_MAILLED))
 963                 set_u32(data->mailled, ACER_CAP_MAILLED);
 964
 965         if (has_cap(ACER_CAP_BRIGHTNESS))
 966                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
 967
 968         return 0;
 969 }
 970
 971 static struct platform_driver acer_platform_driver = {
 972         .driver = {
 973                 .name = "acer-wmi",
 974                 .owner = THIS_MODULE,
 975         },
 976         .probe = acer_platform_probe,
 977         .remove = acer_platform_remove,
 978         .suspend = acer_platform_suspend,
 979         .resume = acer_platform_resume,
 980 };
 981
 982 static struct platform_device *acer_platform_device;
 983
 984 static int remove_sysfs(struct platform_device *device)
 985 {
 986         if (has_cap(ACER_CAP_WIRELESS))
 987                 device_remove_file(&device->dev, &dev_attr_wireless);
 988
 989         if (has_cap(ACER_CAP_BLUETOOTH))
 990                 device_remove_file(&device->dev, &dev_attr_bluetooth);
 991
 992         if (has_cap(ACER_CAP_THREEG))
 993                 device_remove_file(&device->dev, &dev_attr_threeg);
 994
 995         device_remove_file(&device->dev, &dev_attr_interface);
 996
 997         return 0;
 998 }
 999
1000 static int create_sysfs(void)
1001 {
1002         int retval = -ENOMEM;
1003
1004         if (has_cap(ACER_CAP_WIRELESS)) {
1005                 retval = device_create_file(&acer_platform_device->dev,
1006                         &dev_attr_wireless);
1007                 if (retval)
1008                         goto error_sysfs;
1009         }
1010
1011         if (has_cap(ACER_CAP_BLUETOOTH)) {
1012                 retval = device_create_file(&acer_platform_device->dev,
1013                         &dev_attr_bluetooth);
1014                 if (retval)
1015                         goto error_sysfs;
1016         }
1017
1018         if (has_cap(ACER_CAP_THREEG)) {
1019                 retval = device_create_file(&acer_platform_device->dev,
1020                         &dev_attr_threeg);
1021                 if (retval)
1022                         goto error_sysfs;
1023         }
1024
1025         retval = device_create_file(&acer_platform_device->dev,
1026                 &dev_attr_interface);
1027         if (retval)
1028                 goto error_sysfs;
1029
1030         return 0;
1031
1032 error_sysfs:
1033                 remove_sysfs(acer_platform_device);
1034         return retval;
1035 }
1036
1037 static int __init acer_wmi_init(void)
1038 {
1039         int err;
1040
1041         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
1042                         ACER_WMI_VERSION);
1043
1044         /*
1045          * Detect which ACPI-WMI interface we're using.
1046          */
1047         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1048                 interface = &AMW0_V2_interface;
1049
1050         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1051                 interface = &wmid_interface;
1052
1053         if (wmi_has_guid(WMID_GUID2) && interface) {
1054                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1055                         printk(ACER_ERR "Unable to detect available devices\n");
1056                         return -ENODEV;
1057                 }
1058         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1059                 printk(ACER_ERR "Unable to detect available devices\n");
1060                 return -ENODEV;
1061         }
1062
1063         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1064                 interface = &AMW0_interface;
1065
1066                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1067                         printk(ACER_ERR "Unable to detect available devices\n");
1068                         return -ENODEV;
1069                 }
1070         }
1071
1072         if (wmi_has_guid(AMW0_GUID1)) {
1073                 if (ACPI_FAILURE(AMW0_find_mailled()))
1074                         printk(ACER_ERR "Unable to detect mail LED\n");
1075         }
1076
1077         find_quirks();
1078
1079         if (!interface) {
1080                 printk(ACER_ERR "No or unsupported WMI interface, unable to ");
1081                 printk(KERN_CONT "load.\n");
1082                 return -ENODEV;
1083         }
1084
1085         if (platform_driver_register(&acer_platform_driver)) {
1086                 printk(ACER_ERR "Unable to register platform driver.\n");
1087                 goto error_platform_register;
1088         }
1089         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1090         platform_device_add(acer_platform_device);
1091
1092         err = create_sysfs();
1093         if (err)
1094                 return err;
1095
1096         /* Override any initial settings with values from the commandline */
1097         acer_commandline_init();
1098
1099         return 0;
1100
1101 error_platform_register:
1102         return -ENODEV;
1103 }
1104
1105 static void __exit acer_wmi_exit(void)
1106 {
1107         remove_sysfs(acer_platform_device);
1108         platform_device_del(acer_platform_device);
1109         platform_driver_unregister(&acer_platform_driver);
1110
1111         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1112         return;
1113 }
1114
1115 module_init(acer_wmi_init);
1116 module_exit(acer_wmi_exit);