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