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 3610",
 223                 .matches = {
 224                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 225                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 226                 },
 227                 .driver_data = &quirk_acer_travelmate_2490,
 228         },
 229         {
 230                 .callback = dmi_matched,
 231                 .ident = "Acer Aspire 5100",
 232                 .matches = {
 233                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 234                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 235                 },
 236                 .driver_data = &quirk_acer_travelmate_2490,
 237         },
 238         {
 239                 .callback = dmi_matched,
 240                 .ident = "Acer Aspire 5610",
 241                 .matches = {
 242                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 243                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 244                 },
 245                 .driver_data = &quirk_acer_travelmate_2490,
 246         },
 247         {
 248                 .callback = dmi_matched,
 249                 .ident = "Acer Aspire 5630",
 250                 .matches = {
 251                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 252                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 253                 },
 254                 .driver_data = &quirk_acer_travelmate_2490,
 255         },
 256         {
 257                 .callback = dmi_matched,
 258                 .ident = "Acer Aspire 5650",
 259                 .matches = {
 260                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 261                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 262                 },
 263                 .driver_data = &quirk_acer_travelmate_2490,
 264         },
 265         {
 266                 .callback = dmi_matched,
 267                 .ident = "Acer Aspire 5680",
 268                 .matches = {
 269                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 270                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 271                 },
 272                 .driver_data = &quirk_acer_travelmate_2490,
 273         },
 274         {
 275                 .callback = dmi_matched,
 276                 .ident = "Acer Aspire 9110",
 277                 .matches = {
 278                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 279                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 280                 },
 281                 .driver_data = &quirk_acer_travelmate_2490,
 282         },
 283         {
 284                 .callback = dmi_matched,
 285                 .ident = "Acer TravelMate 2490",
 286                 .matches = {
 287                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 288                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 289                 },
 290                 .driver_data = &quirk_acer_travelmate_2490,
 291         },
 292         {
 293                 .callback = dmi_matched,
 294                 .ident = "Acer TravelMate 4200",
 295                 .matches = {
 296                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 297                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 298                 },
 299                 .driver_data = &quirk_acer_travelmate_2490,
 300         },
 301         {
 302                 .callback = dmi_matched,
 303                 .ident = "Medion MD 98300",
 304                 .matches = {
 305                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 306                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 307                 },
 308                 .driver_data = &quirk_medion_md_98300,
 309         },
 310         {}
 311 };
 312
 313 /* Find which quirks are needed for a particular vendor/ model pair */
 314 static void find_quirks(void)
 315 {
 316         if (!force_series) {
 317                 dmi_check_system(acer_quirks);
 318         } else if (force_series == 2490) {
 319                 quirks = &quirk_acer_travelmate_2490;
 320         }
 321
 322         if (quirks == NULL)
 323                 quirks = &quirk_unknown;
 324
 325         set_quirks();
 326 }
 327
 328 /*
 329  * General interface convenience methods
 330  */
 331
 332 static bool has_cap(u32 cap)
 333 {
 334         if ((interface->capability & cap) != 0)
 335                 return 1;
 336
 337         return 0;
 338 }
 339
 340 /*
 341  * AMW0 (V1) interface
 342  */
 343 struct wmab_args {
 344         u32 eax;
 345         u32 ebx;
 346         u32 ecx;
 347         u32 edx;
 348 };
 349
 350 struct wmab_ret {
 351         u32 eax;
 352         u32 ebx;
 353         u32 ecx;
 354         u32 edx;
 355         u32 eex;
 356 };
 357
 358 static acpi_status wmab_execute(struct wmab_args *regbuf,
 359 struct acpi_buffer *result)
 360 {
 361         struct acpi_buffer input;
 362         acpi_status status;
 363         input.length = sizeof(struct wmab_args);
 364         input.pointer = (u8 *)regbuf;
 365
 366         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 367
 368         return status;
 369 }
 370
 371 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 372 struct wmi_interface *iface)
 373 {
 374         int err;
 375         u8 result;
 376
 377         switch (cap) {
 378         case ACER_CAP_MAILLED:
 379                 switch (quirks->mailled) {
 380                 default:
 381                         err = ec_read(0xA, &result);
 382                         if (err)
 383                                 return AE_ERROR;
 384                         *value = (result >> 7) & 0x1;
 385                         return AE_OK;
 386                 }
 387                 break;
 388         case ACER_CAP_WIRELESS:
 389                 switch (quirks->wireless) {
 390                 case 1:
 391                         err = ec_read(0x7B, &result);
 392                         if (err)
 393                                 return AE_ERROR;
 394                         *value = result & 0x1;
 395                         return AE_OK;
 396                 default:
 397                         err = ec_read(0xA, &result);
 398                         if (err)
 399                                 return AE_ERROR;
 400                         *value = (result >> 2) & 0x1;
 401                         return AE_OK;
 402                 }
 403                 break;
 404         case ACER_CAP_BLUETOOTH:
 405                 switch (quirks->bluetooth) {
 406                 default:
 407                         err = ec_read(0xA, &result);
 408                         if (err)
 409                                 return AE_ERROR;
 410                         *value = (result >> 4) & 0x1;
 411                         return AE_OK;
 412                 }
 413                 break;
 414         case ACER_CAP_BRIGHTNESS:
 415                 switch (quirks->brightness) {
 416                 default:
 417                         err = ec_read(0x83, &result);
 418                         if (err)
 419                                 return AE_ERROR;
 420                         *value = result;
 421                         return AE_OK;
 422                 }
 423                 break;
 424         default:
 425                 return AE_BAD_ADDRESS;
 426         }
 427         return AE_OK;
 428 }
 429
 430 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 431 {
 432         struct wmab_args args;
 433
 434         args.eax = ACER_AMW0_WRITE;
 435         args.ebx = value ? (1<<8) : 0;
 436         args.ecx = args.edx = 0;
 437
 438         switch (cap) {
 439         case ACER_CAP_MAILLED:
 440                 if (value > 1)
 441                         return AE_BAD_PARAMETER;
 442                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 443                 break;
 444         case ACER_CAP_WIRELESS:
 445                 if (value > 1)
 446                         return AE_BAD_PARAMETER;
 447                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 448                 break;
 449         case ACER_CAP_BLUETOOTH:
 450                 if (value > 1)
 451                         return AE_BAD_PARAMETER;
 452                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 453                 break;
 454         case ACER_CAP_BRIGHTNESS:
 455                 if (value > max_brightness)
 456                         return AE_BAD_PARAMETER;
 457                 switch (quirks->brightness) {
 458                 default:
 459                         return ec_write(0x83, value);
 460                         break;
 461                 }
 462         default:
 463                 return AE_BAD_ADDRESS;
 464         }
 465
 466         /* Actually do the set */
 467         return wmab_execute(&args, NULL);
 468 }
 469
 470 static acpi_status AMW0_find_mailled(void)
 471 {
 472         struct wmab_args args;
 473         struct wmab_ret ret;
 474         acpi_status status = AE_OK;
 475         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 476         union acpi_object *obj;
 477
 478         args.eax = 0x86;
 479         args.ebx = args.ecx = args.edx = 0;
 480
 481         status = wmab_execute(&args, &out);
 482         if (ACPI_FAILURE(status))
 483                 return status;
 484
 485         obj = (union acpi_object *) out.pointer;
 486         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 487         obj->buffer.length == sizeof(struct wmab_ret)) {
 488                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 489         } else {
 490                 return AE_ERROR;
 491         }
 492
 493         if (ret.eex & 0x1)
 494                 interface->capability |= ACER_CAP_MAILLED;
 495
 496         kfree(out.pointer);
 497
 498         return AE_OK;
 499 }
 500
 501 static acpi_status AMW0_set_capabilities(void)
 502 {
 503         struct wmab_args args;
 504         struct wmab_ret ret;
 505         acpi_status status = AE_OK;
 506         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 507         union acpi_object *obj;
 508
 509         args.eax = ACER_AMW0_WRITE;
 510         args.ecx = args.edx = 0;
 511
 512         args.ebx = 0xa2 << 8;
 513         args.ebx |= ACER_AMW0_WIRELESS_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_WIRELESS;
 529
 530         args.ebx = 2 << 8;
 531         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 532
 533         status = wmab_execute(&args, &out);
 534         if (ACPI_FAILURE(status))
 535                 return status;
 536
 537         obj = (union acpi_object *) out.pointer;
 538         if (obj && obj->type == ACPI_TYPE_BUFFER
 539         && obj->buffer.length == sizeof(struct wmab_ret)) {
 540                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 541         } else {
 542                 return AE_ERROR;
 543         }
 544
 545         if (ret.eax & 0x1)
 546                 interface->capability |= ACER_CAP_BLUETOOTH;
 547
 548         kfree(out.pointer);
 549
 550         /*
 551          * This appears to be safe to enable, since all Wistron based laptops
 552          * appear to use the same EC register for brightness, even if they
 553          * differ for wireless, etc
 554          */
 555         interface->capability |= ACER_CAP_BRIGHTNESS;
 556
 557         return AE_OK;
 558 }
 559
 560 static struct wmi_interface AMW0_interface = {
 561         .type = ACER_AMW0,
 562 };
 563
 564 static struct wmi_interface AMW0_V2_interface = {
 565         .type = ACER_AMW0_V2,
 566 };
 567
 568 /*
 569  * New interface (The WMID interface)
 570  */
 571 static acpi_status
 572 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 573 {
 574         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 575         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 576         union acpi_object *obj;
 577         u32 tmp;
 578         acpi_status status;
 579
 580         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 581
 582         if (ACPI_FAILURE(status))
 583                 return status;
 584
 585         obj = (union acpi_object *) result.pointer;
 586         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 587                 obj->buffer.length == sizeof(u32)) {
 588                 tmp = *((u32 *) obj->buffer.pointer);
 589         } else {
 590                 tmp = 0;
 591         }
 592
 593         if (out)
 594                 *out = tmp;
 595
 596         kfree(result.pointer);
 597
 598         return status;
 599 }
 600
 601 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 602 struct wmi_interface *iface)
 603 {
 604         acpi_status status;
 605         u8 tmp;
 606         u32 result, method_id = 0;
 607
 608         switch (cap) {
 609         case ACER_CAP_WIRELESS:
 610                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 611                 break;
 612         case ACER_CAP_BLUETOOTH:
 613                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 614                 break;
 615         case ACER_CAP_BRIGHTNESS:
 616                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 617                 break;
 618         case ACER_CAP_THREEG:
 619                 method_id = ACER_WMID_GET_THREEG_METHODID;
 620                 break;
 621         case ACER_CAP_MAILLED:
 622                 if (quirks->mailled == 1) {
 623                         ec_read(0x9f, &tmp);
 624                         *value = tmp & 0x1;
 625                         return 0;
 626                 }
 627         default:
 628                 return AE_BAD_ADDRESS;
 629         }
 630         status = WMI_execute_u32(method_id, 0, &result);
 631
 632         if (ACPI_SUCCESS(status))
 633                 *value = (u8)result;
 634
 635         return status;
 636 }
 637
 638 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 639 {
 640         u32 method_id = 0;
 641         char param;
 642
 643         switch (cap) {
 644         case ACER_CAP_BRIGHTNESS:
 645                 if (value > max_brightness)
 646                         return AE_BAD_PARAMETER;
 647                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 648                 break;
 649         case ACER_CAP_WIRELESS:
 650                 if (value > 1)
 651                         return AE_BAD_PARAMETER;
 652                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 653                 break;
 654         case ACER_CAP_BLUETOOTH:
 655                 if (value > 1)
 656                         return AE_BAD_PARAMETER;
 657                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 658                 break;
 659         case ACER_CAP_THREEG:
 660                 if (value > 1)
 661                         return AE_BAD_PARAMETER;
 662                 method_id = ACER_WMID_SET_THREEG_METHODID;
 663                 break;
 664         case ACER_CAP_MAILLED:
 665                 if (value > 1)
 666                         return AE_BAD_PARAMETER;
 667                 if (quirks->mailled == 1) {
 668                         param = value ? 0x92 : 0x93;
 669                         i8042_command(&param, 0x1059);
 670                         return 0;
 671                 }
 672                 break;
 673         default:
 674                 return AE_BAD_ADDRESS;
 675         }
 676         return WMI_execute_u32(method_id, (u32)value, NULL);
 677 }
 678
 679 static acpi_status WMID_set_capabilities(void)
 680 {
 681         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 682         union acpi_object *obj;
 683         acpi_status status;
 684         u32 devices;
 685
 686         status = wmi_query_block(WMID_GUID2, 1, &out);
 687         if (ACPI_FAILURE(status))
 688                 return status;
 689
 690         obj = (union acpi_object *) out.pointer;
 691         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 692                 obj->buffer.length == sizeof(u32)) {
 693                 devices = *((u32 *) obj->buffer.pointer);
 694         } else {
 695                 return AE_ERROR;
 696         }
 697
 698         /* Not sure on the meaning of the relevant bits yet to detect these */
 699         interface->capability |= ACER_CAP_WIRELESS;
 700         interface->capability |= ACER_CAP_THREEG;
 701
 702         /* WMID always provides brightness methods */
 703         interface->capability |= ACER_CAP_BRIGHTNESS;
 704
 705         if (devices & 0x10)
 706                 interface->capability |= ACER_CAP_BLUETOOTH;
 707
 708         if (!(devices & 0x20))
 709                 max_brightness = 0x9;
 710
 711         return status;
 712 }
 713
 714 static struct wmi_interface wmid_interface = {
 715         .type = ACER_WMID,
 716 };
 717
 718 /*
 719  * Generic Device (interface-independent)
 720  */
 721
 722 static acpi_status get_u32(u32 *value, u32 cap)
 723 {
 724         acpi_status status = AE_BAD_ADDRESS;
 725
 726         switch (interface->type) {
 727         case ACER_AMW0:
 728                 status = AMW0_get_u32(value, cap, interface);
 729                 break;
 730         case ACER_AMW0_V2:
 731                 if (cap == ACER_CAP_MAILLED) {
 732                         status = AMW0_get_u32(value, cap, interface);
 733                         break;
 734                 }
 735         case ACER_WMID:
 736                 status = WMID_get_u32(value, cap, interface);
 737                 break;
 738         }
 739
 740         return status;
 741 }
 742
 743 static acpi_status set_u32(u32 value, u32 cap)
 744 {
 745         if (interface->capability & cap) {
 746                 switch (interface->type) {
 747                 case ACER_AMW0:
 748                         return AMW0_set_u32(value, cap, interface);
 749                 case ACER_AMW0_V2:
 750                 case ACER_WMID:
 751                         return WMID_set_u32(value, cap, interface);
 752                 default:
 753                         return AE_BAD_PARAMETER;
 754                 }
 755         }
 756         return AE_BAD_PARAMETER;
 757 }
 758
 759 static void __init acer_commandline_init(void)
 760 {
 761         /*
 762          * These will all fail silently if the value given is invalid, or the
 763          * capability isn't available on the given interface
 764          */
 765         set_u32(mailled, ACER_CAP_MAILLED);
 766         set_u32(wireless, ACER_CAP_WIRELESS);
 767         set_u32(bluetooth, ACER_CAP_BLUETOOTH);
 768         set_u32(threeg, ACER_CAP_THREEG);
 769         set_u32(brightness, ACER_CAP_BRIGHTNESS);
 770 }
 771
 772 /*
 773  * LED device (Mail LED only, no other LEDs known yet)
 774  */
 775 static void mail_led_set(struct led_classdev *led_cdev,
 776 enum led_brightness value)
 777 {
 778         set_u32(value, ACER_CAP_MAILLED);
 779 }
 780
 781 static struct led_classdev mail_led = {
 782         .name = "acer-wmi::mail",
 783         .brightness_set = mail_led_set,
 784 };
 785
 786 static int __devinit acer_led_init(struct device *dev)
 787 {
 788         return led_classdev_register(dev, &mail_led);
 789 }
 790
 791 static void acer_led_exit(void)
 792 {
 793         led_classdev_unregister(&mail_led);
 794 }
 795
 796 /*
 797  * Backlight device
 798  */
 799 static struct backlight_device *acer_backlight_device;
 800
 801 static int read_brightness(struct backlight_device *bd)
 802 {
 803         u32 value;
 804         get_u32(&value, ACER_CAP_BRIGHTNESS);
 805         return value;
 806 }
 807
 808 static int update_bl_status(struct backlight_device *bd)
 809 {
 810         set_u32(bd->props.brightness, ACER_CAP_BRIGHTNESS);
 811         return 0;
 812 }
 813
 814 static struct backlight_ops acer_bl_ops = {
 815         .get_brightness = read_brightness,
 816         .update_status = update_bl_status,
 817 };
 818
 819 static int __devinit acer_backlight_init(struct device *dev)
 820 {
 821         struct backlight_device *bd;
 822
 823         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
 824         if (IS_ERR(bd)) {
 825                 printk(ACER_ERR "Could not register Acer backlight device\n");
 826                 acer_backlight_device = NULL;
 827                 return PTR_ERR(bd);
 828         }
 829
 830         acer_backlight_device = bd;
 831
 832         bd->props.max_brightness = max_brightness;
 833         bd->props.brightness = read_brightness(NULL);
 834         backlight_update_status(bd);
 835         return 0;
 836 }
 837
 838 static void acer_backlight_exit(void)
 839 {
 840         backlight_device_unregister(acer_backlight_device);
 841 }
 842
 843 /*
 844  * Read/ write bool sysfs macro
 845  */
 846 #define show_set_bool(value, cap) \
 847 static ssize_t \
 848 show_bool_##value(struct device *dev, struct device_attribute *attr, \
 849         char *buf) \
 850 { \
 851         u32 result; \
 852         acpi_status status = get_u32(&result, cap); \
 853         if (ACPI_SUCCESS(status)) \
 854                 return sprintf(buf, "%u\n", result); \
 855         return sprintf(buf, "Read error\n"); \
 856 } \
 857 \
 858 static ssize_t \
 859 set_bool_##value(struct device *dev, struct device_attribute *attr, \
 860         const char *buf, size_t count) \
 861 { \
 862         u32 tmp = simple_strtoul(buf, NULL, 10); \
 863         acpi_status status = set_u32(tmp, cap); \
 864                 if (ACPI_FAILURE(status)) \
 865                         return -EINVAL; \
 866         return count; \
 867 } \
 868 static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
 869         show_bool_##value, set_bool_##value);
 870
 871 show_set_bool(wireless, ACER_CAP_WIRELESS);
 872 show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
 873 show_set_bool(threeg, ACER_CAP_THREEG);
 874
 875 /*
 876  * Read interface sysfs macro
 877  */
 878 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
 879         char *buf)
 880 {
 881         switch (interface->type) {
 882         case ACER_AMW0:
 883                 return sprintf(buf, "AMW0\n");
 884         case ACER_AMW0_V2:
 885                 return sprintf(buf, "AMW0 v2\n");
 886         case ACER_WMID:
 887                 return sprintf(buf, "WMID\n");
 888         default:
 889                 return sprintf(buf, "Error!\n");
 890         }
 891 }
 892
 893 static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
 894         show_interface, NULL);
 895
 896 /*
 897  * Platform device
 898  */
 899 static int __devinit acer_platform_probe(struct platform_device *device)
 900 {
 901         int err;
 902
 903         if (has_cap(ACER_CAP_MAILLED)) {
 904                 err = acer_led_init(&device->dev);
 905                 if (err)
 906                         goto error_mailled;
 907         }
 908
 909         if (has_cap(ACER_CAP_BRIGHTNESS)) {
 910                 err = acer_backlight_init(&device->dev);
 911                 if (err)
 912                         goto error_brightness;
 913         }
 914
 915         return 0;
 916
 917 error_brightness:
 918         acer_led_exit();
 919 error_mailled:
 920         return err;
 921 }
 922
 923 static int acer_platform_remove(struct platform_device *device)
 924 {
 925         if (has_cap(ACER_CAP_MAILLED))
 926                 acer_led_exit();
 927         if (has_cap(ACER_CAP_BRIGHTNESS))
 928                 acer_backlight_exit();
 929         return 0;
 930 }
 931
 932 static int acer_platform_suspend(struct platform_device *dev,
 933 pm_message_t state)
 934 {
 935         u32 value;
 936         struct acer_data *data = &interface->data;
 937
 938         if (!data)
 939                 return -ENOMEM;
 940
 941         if (has_cap(ACER_CAP_WIRELESS)) {
 942                 get_u32(&value, ACER_CAP_WIRELESS);
 943                 data->wireless = value;
 944         }
 945
 946         if (has_cap(ACER_CAP_BLUETOOTH)) {
 947                 get_u32(&value, ACER_CAP_BLUETOOTH);
 948                 data->bluetooth = value;
 949         }
 950
 951         if (has_cap(ACER_CAP_MAILLED)) {
 952                 get_u32(&value, ACER_CAP_MAILLED);
 953                 data->mailled = value;
 954         }
 955
 956         if (has_cap(ACER_CAP_BRIGHTNESS)) {
 957                 get_u32(&value, ACER_CAP_BRIGHTNESS);
 958                 data->brightness = value;
 959         }
 960
 961         return 0;
 962 }
 963
 964 static int acer_platform_resume(struct platform_device *device)
 965 {
 966         struct acer_data *data = &interface->data;
 967
 968         if (!data)
 969                 return -ENOMEM;
 970
 971         if (has_cap(ACER_CAP_WIRELESS))
 972                 set_u32(data->wireless, ACER_CAP_WIRELESS);
 973
 974         if (has_cap(ACER_CAP_BLUETOOTH))
 975                 set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
 976
 977         if (has_cap(ACER_CAP_THREEG))
 978                 set_u32(data->threeg, ACER_CAP_THREEG);
 979
 980         if (has_cap(ACER_CAP_MAILLED))
 981                 set_u32(data->mailled, ACER_CAP_MAILLED);
 982
 983         if (has_cap(ACER_CAP_BRIGHTNESS))
 984                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
 985
 986         return 0;
 987 }
 988
 989 static struct platform_driver acer_platform_driver = {
 990         .driver = {
 991                 .name = "acer-wmi",
 992                 .owner = THIS_MODULE,
 993         },
 994         .probe = acer_platform_probe,
 995         .remove = acer_platform_remove,
 996         .suspend = acer_platform_suspend,
 997         .resume = acer_platform_resume,
 998 };
 999
1000 static struct platform_device *acer_platform_device;
1001
1002 static int remove_sysfs(struct platform_device *device)
1003 {
1004         if (has_cap(ACER_CAP_WIRELESS))
1005                 device_remove_file(&device->dev, &dev_attr_wireless);
1006
1007         if (has_cap(ACER_CAP_BLUETOOTH))
1008                 device_remove_file(&device->dev, &dev_attr_bluetooth);
1009
1010         if (has_cap(ACER_CAP_THREEG))
1011                 device_remove_file(&device->dev, &dev_attr_threeg);
1012
1013         device_remove_file(&device->dev, &dev_attr_interface);
1014
1015         return 0;
1016 }
1017
1018 static int create_sysfs(void)
1019 {
1020         int retval = -ENOMEM;
1021
1022         if (has_cap(ACER_CAP_WIRELESS)) {
1023                 retval = device_create_file(&acer_platform_device->dev,
1024                         &dev_attr_wireless);
1025                 if (retval)
1026                         goto error_sysfs;
1027         }
1028
1029         if (has_cap(ACER_CAP_BLUETOOTH)) {
1030                 retval = device_create_file(&acer_platform_device->dev,
1031                         &dev_attr_bluetooth);
1032                 if (retval)
1033                         goto error_sysfs;
1034         }
1035
1036         if (has_cap(ACER_CAP_THREEG)) {
1037                 retval = device_create_file(&acer_platform_device->dev,
1038                         &dev_attr_threeg);
1039                 if (retval)
1040                         goto error_sysfs;
1041         }
1042
1043         retval = device_create_file(&acer_platform_device->dev,
1044                 &dev_attr_interface);
1045         if (retval)
1046                 goto error_sysfs;
1047
1048         return 0;
1049
1050 error_sysfs:
1051                 remove_sysfs(acer_platform_device);
1052         return retval;
1053 }
1054
1055 static int __init acer_wmi_init(void)
1056 {
1057         int err;
1058
1059         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
1060                         ACER_WMI_VERSION);
1061
1062         /*
1063          * Detect which ACPI-WMI interface we're using.
1064          */
1065         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1066                 interface = &AMW0_V2_interface;
1067
1068         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1069                 interface = &wmid_interface;
1070
1071         if (wmi_has_guid(WMID_GUID2) && interface) {
1072                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1073                         printk(ACER_ERR "Unable to detect available WMID "
1074                                         "devices\n");
1075                         return -ENODEV;
1076                 }
1077         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1078                 printk(ACER_ERR "No WMID device detection method found\n");
1079                 return -ENODEV;
1080         }
1081
1082         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1083                 interface = &AMW0_interface;
1084
1085                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1086                         printk(ACER_ERR "Unable to detect available AMW0 "
1087                                         "devices\n");
1088                         return -ENODEV;
1089                 }
1090         }
1091
1092         if (wmi_has_guid(AMW0_GUID1))
1093                 AMW0_find_mailled();
1094
1095         find_quirks();
1096
1097         if (!interface) {
1098                 printk(ACER_ERR "No or unsupported WMI interface, unable to "
1099                                 "load\n");
1100                 return -ENODEV;
1101         }
1102
1103         if (platform_driver_register(&acer_platform_driver)) {
1104                 printk(ACER_ERR "Unable to register platform driver.\n");
1105                 goto error_platform_register;
1106         }
1107         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1108         platform_device_add(acer_platform_device);
1109
1110         err = create_sysfs();
1111         if (err)
1112                 return err;
1113
1114         /* Override any initial settings with values from the commandline */
1115         acer_commandline_init();
1116
1117         return 0;
1118
1119 error_platform_register:
1120         return -ENODEV;
1121 }
1122
1123 static void __exit acer_wmi_exit(void)
1124 {
1125         remove_sysfs(acer_platform_device);
1126         platform_device_del(acer_platform_device);
1127         platform_driver_unregister(&acer_platform_driver);
1128
1129         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1130         return;
1131 }
1132
1133 module_init(acer_wmi_init);
1134 module_exit(acer_wmi_exit);