drivers/platform/x86/acer-wmi.c

   1 /*
   2  *  Acer WMI Laptop Extras
   3  *
   4  *  Copyright (C) 2007-2009     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 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/dmi.h>
  30 #include <linux/fb.h>
  31 #include <linux/backlight.h>
  32 #include <linux/leds.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/acpi.h>
  35 #include <linux/i8042.h>
  36 #include <linux/rfkill.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/debugfs.h>
  39 #include <linux/slab.h>
  40
  41 #include <acpi/acpi_drivers.h>
  42
  43 MODULE_AUTHOR("Carlos Corbacho");
  44 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  45 MODULE_LICENSE("GPL");
  46
  47 #define ACER_LOGPREFIX "acer-wmi: "
  48 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
  49 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
  50 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
  51
  52 /*
  53  * The following defines quirks to get some specific functions to work
  54  * which are known to not be supported over ACPI-WMI (such as the mail LED
  55  * on WMID based Acer's)
  56  */
  57 struct acer_quirks {
  58         const char *vendor;
  59         const char *model;
  60         u16 quirks;
  61 };
  62
  63 /*
  64  * Magic Number
  65  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  66  * (it's also used in acerhk when directly accessing the BIOS)
  67  */
  68 #define ACER_AMW0_WRITE 0x9610
  69
  70 /*
  71  * Bit masks for the AMW0 interface
  72  */
  73 #define ACER_AMW0_WIRELESS_MASK  0x35
  74 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  75 #define ACER_AMW0_MAILLED_MASK   0x31
  76
  77 /*
  78  * Method IDs for WMID interface
  79  */
  80 #define ACER_WMID_GET_WIRELESS_METHODID         1
  81 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  82 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  83 #define ACER_WMID_SET_WIRELESS_METHODID         4
  84 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  85 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  86 #define ACER_WMID_GET_THREEG_METHODID           10
  87 #define ACER_WMID_SET_THREEG_METHODID           11
  88
  89 /*
  90  * Acer ACPI method GUIDs
  91  */
  92 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  93 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
  94 #define WMID_GUID1              "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
  95 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
  96
  97 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  98 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
  99
 100 /*
 101  * Interface capability flags
 102  */
 103 #define ACER_CAP_MAILLED                (1<<0)
 104 #define ACER_CAP_WIRELESS               (1<<1)
 105 #define ACER_CAP_BLUETOOTH              (1<<2)
 106 #define ACER_CAP_BRIGHTNESS             (1<<3)
 107 #define ACER_CAP_THREEG                 (1<<4)
 108 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 109
 110 /*
 111  * Interface type flags
 112  */
 113 enum interface_flags {
 114         ACER_AMW0,
 115         ACER_AMW0_V2,
 116         ACER_WMID,
 117 };
 118
 119 #define ACER_DEFAULT_WIRELESS  0
 120 #define ACER_DEFAULT_BLUETOOTH 0
 121 #define ACER_DEFAULT_MAILLED   0
 122 #define ACER_DEFAULT_THREEG    0
 123
 124 static int max_brightness = 0xF;
 125
 126 static int mailled = -1;
 127 static int brightness = -1;
 128 static int threeg = -1;
 129 static int force_series;
 130
 131 module_param(mailled, int, 0444);
 132 module_param(brightness, int, 0444);
 133 module_param(threeg, int, 0444);
 134 module_param(force_series, int, 0444);
 135 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 136 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 137 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 138 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 139
 140 struct acer_data {
 141         int mailled;
 142         int threeg;
 143         int brightness;
 144 };
 145
 146 struct acer_debug {
 147         struct dentry *root;
 148         struct dentry *devices;
 149         u32 wmid_devices;
 150 };
 151
 152 static struct rfkill *wireless_rfkill;
 153 static struct rfkill *bluetooth_rfkill;
 154
 155 /* Each low-level interface must define at least some of the following */
 156 struct wmi_interface {
 157         /* The WMI device type */
 158         u32 type;
 159
 160         /* The capabilities this interface provides */
 161         u32 capability;
 162
 163         /* Private data for the current interface */
 164         struct acer_data data;
 165
 166         /* debugfs entries associated with this interface */
 167         struct acer_debug debug;
 168 };
 169
 170 /* The static interface pointer, points to the currently detected interface */
 171 static struct wmi_interface *interface;
 172
 173 /*
 174  * Embedded Controller quirks
 175  * Some laptops require us to directly access the EC to either enable or query
 176  * features that are not available through WMI.
 177  */
 178
 179 struct quirk_entry {
 180         u8 wireless;
 181         u8 mailled;
 182         s8 brightness;
 183         u8 bluetooth;
 184 };
 185
 186 static struct quirk_entry *quirks;
 187
 188 static void set_quirks(void)
 189 {
 190         if (!interface)
 191                 return;
 192
 193         if (quirks->mailled)
 194                 interface->capability |= ACER_CAP_MAILLED;
 195
 196         if (quirks->brightness)
 197                 interface->capability |= ACER_CAP_BRIGHTNESS;
 198 }
 199
 200 static int dmi_matched(const struct dmi_system_id *dmi)
 201 {
 202         quirks = dmi->driver_data;
 203         return 1;
 204 }
 205
 206 static struct quirk_entry quirk_unknown = {
 207 };
 208
 209 static struct quirk_entry quirk_acer_aspire_1520 = {
 210         .brightness = -1,
 211 };
 212
 213 static struct quirk_entry quirk_acer_travelmate_2490 = {
 214         .mailled = 1,
 215 };
 216
 217 /* This AMW0 laptop has no bluetooth */
 218 static struct quirk_entry quirk_medion_md_98300 = {
 219         .wireless = 1,
 220 };
 221
 222 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 223         .wireless = 2,
 224 };
 225
 226 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 227 static struct dmi_system_id __devinitdata acer_blacklist[] = {
 228         {
 229                 .ident = "Acer Aspire One (SSD)",
 230                 .matches = {
 231                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 232                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
 233                 },
 234         },
 235         {
 236                 .ident = "Acer Aspire One (HDD)",
 237                 .matches = {
 238                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 239                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
 240                 },
 241         },
 242         {}
 243 };
 244
 245 static struct dmi_system_id acer_quirks[] = {
 246         {
 247                 .callback = dmi_matched,
 248                 .ident = "Acer Aspire 1360",
 249                 .matches = {
 250                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 251                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 252                 },
 253                 .driver_data = &quirk_acer_aspire_1520,
 254         },
 255         {
 256                 .callback = dmi_matched,
 257                 .ident = "Acer Aspire 1520",
 258                 .matches = {
 259                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 260                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 261                 },
 262                 .driver_data = &quirk_acer_aspire_1520,
 263         },
 264         {
 265                 .callback = dmi_matched,
 266                 .ident = "Acer Aspire 3100",
 267                 .matches = {
 268                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 269                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 270                 },
 271                 .driver_data = &quirk_acer_travelmate_2490,
 272         },
 273         {
 274                 .callback = dmi_matched,
 275                 .ident = "Acer Aspire 3610",
 276                 .matches = {
 277                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 278                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 279                 },
 280                 .driver_data = &quirk_acer_travelmate_2490,
 281         },
 282         {
 283                 .callback = dmi_matched,
 284                 .ident = "Acer Aspire 5100",
 285                 .matches = {
 286                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 287                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 288                 },
 289                 .driver_data = &quirk_acer_travelmate_2490,
 290         },
 291         {
 292                 .callback = dmi_matched,
 293                 .ident = "Acer Aspire 5610",
 294                 .matches = {
 295                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 296                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 297                 },
 298                 .driver_data = &quirk_acer_travelmate_2490,
 299         },
 300         {
 301                 .callback = dmi_matched,
 302                 .ident = "Acer Aspire 5630",
 303                 .matches = {
 304                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 305                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 306                 },
 307                 .driver_data = &quirk_acer_travelmate_2490,
 308         },
 309         {
 310                 .callback = dmi_matched,
 311                 .ident = "Acer Aspire 5650",
 312                 .matches = {
 313                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 314                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 315                 },
 316                 .driver_data = &quirk_acer_travelmate_2490,
 317         },
 318         {
 319                 .callback = dmi_matched,
 320                 .ident = "Acer Aspire 5680",
 321                 .matches = {
 322                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 323                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 324                 },
 325                 .driver_data = &quirk_acer_travelmate_2490,
 326         },
 327         {
 328                 .callback = dmi_matched,
 329                 .ident = "Acer Aspire 9110",
 330                 .matches = {
 331                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 332                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 333                 },
 334                 .driver_data = &quirk_acer_travelmate_2490,
 335         },
 336         {
 337                 .callback = dmi_matched,
 338                 .ident = "Acer TravelMate 2490",
 339                 .matches = {
 340                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 341                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 342                 },
 343                 .driver_data = &quirk_acer_travelmate_2490,
 344         },
 345         {
 346                 .callback = dmi_matched,
 347                 .ident = "Acer TravelMate 4200",
 348                 .matches = {
 349                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 350                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 351                 },
 352                 .driver_data = &quirk_acer_travelmate_2490,
 353         },
 354         {
 355                 .callback = dmi_matched,
 356                 .ident = "Fujitsu Siemens Amilo Li 1718",
 357                 .matches = {
 358                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 359                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 360                 },
 361                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 362         },
 363         {
 364                 .callback = dmi_matched,
 365                 .ident = "Medion MD 98300",
 366                 .matches = {
 367                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 368                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 369                 },
 370                 .driver_data = &quirk_medion_md_98300,
 371         },
 372         {}
 373 };
 374
 375 /* Find which quirks are needed for a particular vendor/ model pair */
 376 static void find_quirks(void)
 377 {
 378         if (!force_series) {
 379                 dmi_check_system(acer_quirks);
 380         } else if (force_series == 2490) {
 381                 quirks = &quirk_acer_travelmate_2490;
 382         }
 383
 384         if (quirks == NULL)
 385                 quirks = &quirk_unknown;
 386
 387         set_quirks();
 388 }
 389
 390 /*
 391  * General interface convenience methods
 392  */
 393
 394 static bool has_cap(u32 cap)
 395 {
 396         if ((interface->capability & cap) != 0)
 397                 return 1;
 398
 399         return 0;
 400 }
 401
 402 /*
 403  * AMW0 (V1) interface
 404  */
 405 struct wmab_args {
 406         u32 eax;
 407         u32 ebx;
 408         u32 ecx;
 409         u32 edx;
 410 };
 411
 412 struct wmab_ret {
 413         u32 eax;
 414         u32 ebx;
 415         u32 ecx;
 416         u32 edx;
 417         u32 eex;
 418 };
 419
 420 static acpi_status wmab_execute(struct wmab_args *regbuf,
 421 struct acpi_buffer *result)
 422 {
 423         struct acpi_buffer input;
 424         acpi_status status;
 425         input.length = sizeof(struct wmab_args);
 426         input.pointer = (u8 *)regbuf;
 427
 428         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 429
 430         return status;
 431 }
 432
 433 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 434 struct wmi_interface *iface)
 435 {
 436         int err;
 437         u8 result;
 438
 439         switch (cap) {
 440         case ACER_CAP_MAILLED:
 441                 switch (quirks->mailled) {
 442                 default:
 443                         err = ec_read(0xA, &result);
 444                         if (err)
 445                                 return AE_ERROR;
 446                         *value = (result >> 7) & 0x1;
 447                         return AE_OK;
 448                 }
 449                 break;
 450         case ACER_CAP_WIRELESS:
 451                 switch (quirks->wireless) {
 452                 case 1:
 453                         err = ec_read(0x7B, &result);
 454                         if (err)
 455                                 return AE_ERROR;
 456                         *value = result & 0x1;
 457                         return AE_OK;
 458                 case 2:
 459                         err = ec_read(0x71, &result);
 460                         if (err)
 461                                 return AE_ERROR;
 462                         *value = result & 0x1;
 463                         return AE_OK;
 464                 default:
 465                         err = ec_read(0xA, &result);
 466                         if (err)
 467                                 return AE_ERROR;
 468                         *value = (result >> 2) & 0x1;
 469                         return AE_OK;
 470                 }
 471                 break;
 472         case ACER_CAP_BLUETOOTH:
 473                 switch (quirks->bluetooth) {
 474                 default:
 475                         err = ec_read(0xA, &result);
 476                         if (err)
 477                                 return AE_ERROR;
 478                         *value = (result >> 4) & 0x1;
 479                         return AE_OK;
 480                 }
 481                 break;
 482         case ACER_CAP_BRIGHTNESS:
 483                 switch (quirks->brightness) {
 484                 default:
 485                         err = ec_read(0x83, &result);
 486                         if (err)
 487                                 return AE_ERROR;
 488                         *value = result;
 489                         return AE_OK;
 490                 }
 491                 break;
 492         default:
 493                 return AE_ERROR;
 494         }
 495         return AE_OK;
 496 }
 497
 498 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 499 {
 500         struct wmab_args args;
 501
 502         args.eax = ACER_AMW0_WRITE;
 503         args.ebx = value ? (1<<8) : 0;
 504         args.ecx = args.edx = 0;
 505
 506         switch (cap) {
 507         case ACER_CAP_MAILLED:
 508                 if (value > 1)
 509                         return AE_BAD_PARAMETER;
 510                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 511                 break;
 512         case ACER_CAP_WIRELESS:
 513                 if (value > 1)
 514                         return AE_BAD_PARAMETER;
 515                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 516                 break;
 517         case ACER_CAP_BLUETOOTH:
 518                 if (value > 1)
 519                         return AE_BAD_PARAMETER;
 520                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 521                 break;
 522         case ACER_CAP_BRIGHTNESS:
 523                 if (value > max_brightness)
 524                         return AE_BAD_PARAMETER;
 525                 switch (quirks->brightness) {
 526                 default:
 527                         return ec_write(0x83, value);
 528                         break;
 529                 }
 530         default:
 531                 return AE_ERROR;
 532         }
 533
 534         /* Actually do the set */
 535         return wmab_execute(&args, NULL);
 536 }
 537
 538 static acpi_status AMW0_find_mailled(void)
 539 {
 540         struct wmab_args args;
 541         struct wmab_ret ret;
 542         acpi_status status = AE_OK;
 543         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 544         union acpi_object *obj;
 545
 546         args.eax = 0x86;
 547         args.ebx = args.ecx = args.edx = 0;
 548
 549         status = wmab_execute(&args, &out);
 550         if (ACPI_FAILURE(status))
 551                 return status;
 552
 553         obj = (union acpi_object *) out.pointer;
 554         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 555         obj->buffer.length == sizeof(struct wmab_ret)) {
 556                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 557         } else {
 558                 kfree(out.pointer);
 559                 return AE_ERROR;
 560         }
 561
 562         if (ret.eex & 0x1)
 563                 interface->capability |= ACER_CAP_MAILLED;
 564
 565         kfree(out.pointer);
 566
 567         return AE_OK;
 568 }
 569
 570 static acpi_status AMW0_set_capabilities(void)
 571 {
 572         struct wmab_args args;
 573         struct wmab_ret ret;
 574         acpi_status status;
 575         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 576         union acpi_object *obj;
 577
 578         /*
 579          * On laptops with this strange GUID (non Acer), normal probing doesn't
 580          * work.
 581          */
 582         if (wmi_has_guid(AMW0_GUID2)) {
 583                 interface->capability |= ACER_CAP_WIRELESS;
 584                 return AE_OK;
 585         }
 586
 587         args.eax = ACER_AMW0_WRITE;
 588         args.ecx = args.edx = 0;
 589
 590         args.ebx = 0xa2 << 8;
 591         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 592
 593         status = wmab_execute(&args, &out);
 594         if (ACPI_FAILURE(status))
 595                 return status;
 596
 597         obj = out.pointer;
 598         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 599         obj->buffer.length == sizeof(struct wmab_ret)) {
 600                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 601         } else {
 602                 status = AE_ERROR;
 603                 goto out;
 604         }
 605
 606         if (ret.eax & 0x1)
 607                 interface->capability |= ACER_CAP_WIRELESS;
 608
 609         args.ebx = 2 << 8;
 610         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 611
 612         /*
 613          * It's ok to use existing buffer for next wmab_execute call.
 614          * But we need to kfree(out.pointer) if next wmab_execute fail.
 615          */
 616         status = wmab_execute(&args, &out);
 617         if (ACPI_FAILURE(status))
 618                 goto out;
 619
 620         obj = (union acpi_object *) out.pointer;
 621         if (obj && obj->type == ACPI_TYPE_BUFFER
 622         && obj->buffer.length == sizeof(struct wmab_ret)) {
 623                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 624         } else {
 625                 status = AE_ERROR;
 626                 goto out;
 627         }
 628
 629         if (ret.eax & 0x1)
 630                 interface->capability |= ACER_CAP_BLUETOOTH;
 631
 632         /*
 633          * This appears to be safe to enable, since all Wistron based laptops
 634          * appear to use the same EC register for brightness, even if they
 635          * differ for wireless, etc
 636          */
 637         if (quirks->brightness >= 0)
 638                 interface->capability |= ACER_CAP_BRIGHTNESS;
 639
 640         status = AE_OK;
 641 out:
 642         kfree(out.pointer);
 643         return status;
 644 }
 645
 646 static struct wmi_interface AMW0_interface = {
 647         .type = ACER_AMW0,
 648 };
 649
 650 static struct wmi_interface AMW0_V2_interface = {
 651         .type = ACER_AMW0_V2,
 652 };
 653
 654 /*
 655  * New interface (The WMID interface)
 656  */
 657 static acpi_status
 658 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 659 {
 660         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 661         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 662         union acpi_object *obj;
 663         u32 tmp;
 664         acpi_status status;
 665
 666         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 667
 668         if (ACPI_FAILURE(status))
 669                 return status;
 670
 671         obj = (union acpi_object *) result.pointer;
 672         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 673                 obj->buffer.length == sizeof(u32)) {
 674                 tmp = *((u32 *) obj->buffer.pointer);
 675         } else {
 676                 tmp = 0;
 677         }
 678
 679         if (out)
 680                 *out = tmp;
 681
 682         kfree(result.pointer);
 683
 684         return status;
 685 }
 686
 687 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 688 struct wmi_interface *iface)
 689 {
 690         acpi_status status;
 691         u8 tmp;
 692         u32 result, method_id = 0;
 693
 694         switch (cap) {
 695         case ACER_CAP_WIRELESS:
 696                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 697                 break;
 698         case ACER_CAP_BLUETOOTH:
 699                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 700                 break;
 701         case ACER_CAP_BRIGHTNESS:
 702                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 703                 break;
 704         case ACER_CAP_THREEG:
 705                 method_id = ACER_WMID_GET_THREEG_METHODID;
 706                 break;
 707         case ACER_CAP_MAILLED:
 708                 if (quirks->mailled == 1) {
 709                         ec_read(0x9f, &tmp);
 710                         *value = tmp & 0x1;
 711                         return 0;
 712                 }
 713         default:
 714                 return AE_ERROR;
 715         }
 716         status = WMI_execute_u32(method_id, 0, &result);
 717
 718         if (ACPI_SUCCESS(status))
 719                 *value = (u8)result;
 720
 721         return status;
 722 }
 723
 724 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 725 {
 726         u32 method_id = 0;
 727         char param;
 728
 729         switch (cap) {
 730         case ACER_CAP_BRIGHTNESS:
 731                 if (value > max_brightness)
 732                         return AE_BAD_PARAMETER;
 733                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 734                 break;
 735         case ACER_CAP_WIRELESS:
 736                 if (value > 1)
 737                         return AE_BAD_PARAMETER;
 738                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 739                 break;
 740         case ACER_CAP_BLUETOOTH:
 741                 if (value > 1)
 742                         return AE_BAD_PARAMETER;
 743                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 744                 break;
 745         case ACER_CAP_THREEG:
 746                 if (value > 1)
 747                         return AE_BAD_PARAMETER;
 748                 method_id = ACER_WMID_SET_THREEG_METHODID;
 749                 break;
 750         case ACER_CAP_MAILLED:
 751                 if (value > 1)
 752                         return AE_BAD_PARAMETER;
 753                 if (quirks->mailled == 1) {
 754                         param = value ? 0x92 : 0x93;
 755                         i8042_lock_chip();
 756                         i8042_command(&param, 0x1059);
 757                         i8042_unlock_chip();
 758                         return 0;
 759                 }
 760                 break;
 761         default:
 762                 return AE_ERROR;
 763         }
 764         return WMI_execute_u32(method_id, (u32)value, NULL);
 765 }
 766
 767 static acpi_status WMID_set_capabilities(void)
 768 {
 769         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 770         union acpi_object *obj;
 771         acpi_status status;
 772         u32 devices;
 773
 774         status = wmi_query_block(WMID_GUID2, 1, &out);
 775         if (ACPI_FAILURE(status))
 776                 return status;
 777
 778         obj = (union acpi_object *) out.pointer;
 779         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 780                 obj->buffer.length == sizeof(u32)) {
 781                 devices = *((u32 *) obj->buffer.pointer);
 782         } else {
 783                 kfree(out.pointer);
 784                 return AE_ERROR;
 785         }
 786
 787         /* Not sure on the meaning of the relevant bits yet to detect these */
 788         interface->capability |= ACER_CAP_WIRELESS;
 789         interface->capability |= ACER_CAP_THREEG;
 790
 791         /* WMID always provides brightness methods */
 792         interface->capability |= ACER_CAP_BRIGHTNESS;
 793
 794         if (devices & 0x10)
 795                 interface->capability |= ACER_CAP_BLUETOOTH;
 796
 797         if (!(devices & 0x20))
 798                 max_brightness = 0x9;
 799
 800         kfree(out.pointer);
 801         return status;
 802 }
 803
 804 static struct wmi_interface wmid_interface = {
 805         .type = ACER_WMID,
 806 };
 807
 808 /*
 809  * Generic Device (interface-independent)
 810  */
 811
 812 static acpi_status get_u32(u32 *value, u32 cap)
 813 {
 814         acpi_status status = AE_ERROR;
 815
 816         switch (interface->type) {
 817         case ACER_AMW0:
 818                 status = AMW0_get_u32(value, cap, interface);
 819                 break;
 820         case ACER_AMW0_V2:
 821                 if (cap == ACER_CAP_MAILLED) {
 822                         status = AMW0_get_u32(value, cap, interface);
 823                         break;
 824                 }
 825         case ACER_WMID:
 826                 status = WMID_get_u32(value, cap, interface);
 827                 break;
 828         }
 829
 830         return status;
 831 }
 832
 833 static acpi_status set_u32(u32 value, u32 cap)
 834 {
 835         acpi_status status;
 836
 837         if (interface->capability & cap) {
 838                 switch (interface->type) {
 839                 case ACER_AMW0:
 840                         return AMW0_set_u32(value, cap, interface);
 841                 case ACER_AMW0_V2:
 842                         if (cap == ACER_CAP_MAILLED)
 843                                 return AMW0_set_u32(value, cap, interface);
 844
 845                         /*
 846                          * On some models, some WMID methods don't toggle
 847                          * properly. For those cases, we want to run the AMW0
 848                          * method afterwards to be certain we've really toggled
 849                          * the device state.
 850                          */
 851                         if (cap == ACER_CAP_WIRELESS ||
 852                                 cap == ACER_CAP_BLUETOOTH) {
 853                                 status = WMID_set_u32(value, cap, interface);
 854                                 if (ACPI_FAILURE(status))
 855                                         return status;
 856
 857                                 return AMW0_set_u32(value, cap, interface);
 858                         }
 859                 case ACER_WMID:
 860                         return WMID_set_u32(value, cap, interface);
 861                 default:
 862                         return AE_BAD_PARAMETER;
 863                 }
 864         }
 865         return AE_BAD_PARAMETER;
 866 }
 867
 868 static void __init acer_commandline_init(void)
 869 {
 870         /*
 871          * These will all fail silently if the value given is invalid, or the
 872          * capability isn't available on the given interface
 873          */
 874         set_u32(mailled, ACER_CAP_MAILLED);
 875         set_u32(threeg, ACER_CAP_THREEG);
 876         set_u32(brightness, ACER_CAP_BRIGHTNESS);
 877 }
 878
 879 /*
 880  * LED device (Mail LED only, no other LEDs known yet)
 881  */
 882 static void mail_led_set(struct led_classdev *led_cdev,
 883 enum led_brightness value)
 884 {
 885         set_u32(value, ACER_CAP_MAILLED);
 886 }
 887
 888 static struct led_classdev mail_led = {
 889         .name = "acer-wmi::mail",
 890         .brightness_set = mail_led_set,
 891 };
 892
 893 static int __devinit acer_led_init(struct device *dev)
 894 {
 895         return led_classdev_register(dev, &mail_led);
 896 }
 897
 898 static void acer_led_exit(void)
 899 {
 900         led_classdev_unregister(&mail_led);
 901 }
 902
 903 /*
 904  * Backlight device
 905  */
 906 static struct backlight_device *acer_backlight_device;
 907
 908 static int read_brightness(struct backlight_device *bd)
 909 {
 910         u32 value;
 911         get_u32(&value, ACER_CAP_BRIGHTNESS);
 912         return value;
 913 }
 914
 915 static int update_bl_status(struct backlight_device *bd)
 916 {
 917         int intensity = bd->props.brightness;
 918
 919         if (bd->props.power != FB_BLANK_UNBLANK)
 920                 intensity = 0;
 921         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
 922                 intensity = 0;
 923
 924         set_u32(intensity, ACER_CAP_BRIGHTNESS);
 925
 926         return 0;
 927 }
 928
 929 static struct backlight_ops acer_bl_ops = {
 930         .get_brightness = read_brightness,
 931         .update_status = update_bl_status,
 932 };
 933
 934 static int __devinit acer_backlight_init(struct device *dev)
 935 {
 936         struct backlight_properties props;
 937         struct backlight_device *bd;
 938
 939         memset(&props, 0, sizeof(struct backlight_properties));
 940         props.max_brightness = max_brightness;
 941         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
 942                                        &props);
 943         if (IS_ERR(bd)) {
 944                 printk(ACER_ERR "Could not register Acer backlight device\n");
 945                 acer_backlight_device = NULL;
 946                 return PTR_ERR(bd);
 947         }
 948
 949         acer_backlight_device = bd;
 950
 951         bd->props.power = FB_BLANK_UNBLANK;
 952         bd->props.brightness = read_brightness(bd);
 953         backlight_update_status(bd);
 954         return 0;
 955 }
 956
 957 static void acer_backlight_exit(void)
 958 {
 959         backlight_device_unregister(acer_backlight_device);
 960 }
 961
 962 /*
 963  * Rfkill devices
 964  */
 965 static void acer_rfkill_update(struct work_struct *ignored);
 966 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
 967 static void acer_rfkill_update(struct work_struct *ignored)
 968 {
 969         u32 state;
 970         acpi_status status;
 971
 972         status = get_u32(&state, ACER_CAP_WIRELESS);
 973         if (ACPI_SUCCESS(status))
 974                 rfkill_set_sw_state(wireless_rfkill, !state);
 975
 976         if (has_cap(ACER_CAP_BLUETOOTH)) {
 977                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
 978                 if (ACPI_SUCCESS(status))
 979                         rfkill_set_sw_state(bluetooth_rfkill, !state);
 980         }
 981
 982         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
 983 }
 984
 985 static int acer_rfkill_set(void *data, bool blocked)
 986 {
 987         acpi_status status;
 988         u32 cap = (unsigned long)data;
 989         status = set_u32(!blocked, cap);
 990         if (ACPI_FAILURE(status))
 991                 return -ENODEV;
 992         return 0;
 993 }
 994
 995 static const struct rfkill_ops acer_rfkill_ops = {
 996         .set_block = acer_rfkill_set,
 997 };
 998
 999 static struct rfkill *acer_rfkill_register(struct device *dev,
1000                                            enum rfkill_type type,
1001                                            char *name, u32 cap)
1002 {
1003         int err;
1004         struct rfkill *rfkill_dev;
1005
1006         rfkill_dev = rfkill_alloc(name, dev, type,
1007                                   &acer_rfkill_ops,
1008                                   (void *)(unsigned long)cap);
1009         if (!rfkill_dev)
1010                 return ERR_PTR(-ENOMEM);
1011
1012         err = rfkill_register(rfkill_dev);
1013         if (err) {
1014                 rfkill_destroy(rfkill_dev);
1015                 return ERR_PTR(err);
1016         }
1017         return rfkill_dev;
1018 }
1019
1020 static int acer_rfkill_init(struct device *dev)
1021 {
1022         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1023                 "acer-wireless", ACER_CAP_WIRELESS);
1024         if (IS_ERR(wireless_rfkill))
1025                 return PTR_ERR(wireless_rfkill);
1026
1027         if (has_cap(ACER_CAP_BLUETOOTH)) {
1028                 bluetooth_rfkill = acer_rfkill_register(dev,
1029                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1030                         ACER_CAP_BLUETOOTH);
1031                 if (IS_ERR(bluetooth_rfkill)) {
1032                         rfkill_unregister(wireless_rfkill);
1033                         rfkill_destroy(wireless_rfkill);
1034                         return PTR_ERR(bluetooth_rfkill);
1035                 }
1036         }
1037
1038         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1039
1040         return 0;
1041 }
1042
1043 static void acer_rfkill_exit(void)
1044 {
1045         cancel_delayed_work_sync(&acer_rfkill_work);
1046
1047         rfkill_unregister(wireless_rfkill);
1048         rfkill_destroy(wireless_rfkill);
1049
1050         if (has_cap(ACER_CAP_BLUETOOTH)) {
1051                 rfkill_unregister(bluetooth_rfkill);
1052                 rfkill_destroy(bluetooth_rfkill);
1053         }
1054         return;
1055 }
1056
1057 /*
1058  * sysfs interface
1059  */
1060 static ssize_t show_bool_threeg(struct device *dev,
1061         struct device_attribute *attr, char *buf)
1062 {
1063         u32 result; \
1064         acpi_status status = get_u32(&result, ACER_CAP_THREEG);
1065         if (ACPI_SUCCESS(status))
1066                 return sprintf(buf, "%u\n", result);
1067         return sprintf(buf, "Read error\n");
1068 }
1069
1070 static ssize_t set_bool_threeg(struct device *dev,
1071         struct device_attribute *attr, const char *buf, size_t count)
1072 {
1073         u32 tmp = simple_strtoul(buf, NULL, 10);
1074         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1075                 if (ACPI_FAILURE(status))
1076                         return -EINVAL;
1077         return count;
1078 }
1079 static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
1080         set_bool_threeg);
1081
1082 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1083         char *buf)
1084 {
1085         switch (interface->type) {
1086         case ACER_AMW0:
1087                 return sprintf(buf, "AMW0\n");
1088         case ACER_AMW0_V2:
1089                 return sprintf(buf, "AMW0 v2\n");
1090         case ACER_WMID:
1091                 return sprintf(buf, "WMID\n");
1092         default:
1093                 return sprintf(buf, "Error!\n");
1094         }
1095 }
1096
1097 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1098
1099 /*
1100  * debugfs functions
1101  */
1102 static u32 get_wmid_devices(void)
1103 {
1104         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1105         union acpi_object *obj;
1106         acpi_status status;
1107         u32 devices = 0;
1108
1109         status = wmi_query_block(WMID_GUID2, 1, &out);
1110         if (ACPI_FAILURE(status))
1111                 return 0;
1112
1113         obj = (union acpi_object *) out.pointer;
1114         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1115                 obj->buffer.length == sizeof(u32)) {
1116                 devices = *((u32 *) obj->buffer.pointer);
1117         }
1118
1119         kfree(out.pointer);
1120         return devices;
1121 }
1122
1123 /*
1124  * Platform device
1125  */
1126 static int __devinit acer_platform_probe(struct platform_device *device)
1127 {
1128         int err;
1129
1130         if (has_cap(ACER_CAP_MAILLED)) {
1131                 err = acer_led_init(&device->dev);
1132                 if (err)
1133                         goto error_mailled;
1134         }
1135
1136         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1137                 err = acer_backlight_init(&device->dev);
1138                 if (err)
1139                         goto error_brightness;
1140         }
1141
1142         err = acer_rfkill_init(&device->dev);
1143         if (err)
1144                 goto error_rfkill;
1145
1146         return err;
1147
1148 error_rfkill:
1149         if (has_cap(ACER_CAP_BRIGHTNESS))
1150                 acer_backlight_exit();
1151 error_brightness:
1152         if (has_cap(ACER_CAP_MAILLED))
1153                 acer_led_exit();
1154 error_mailled:
1155         return err;
1156 }
1157
1158 static int acer_platform_remove(struct platform_device *device)
1159 {
1160         if (has_cap(ACER_CAP_MAILLED))
1161                 acer_led_exit();
1162         if (has_cap(ACER_CAP_BRIGHTNESS))
1163                 acer_backlight_exit();
1164
1165         acer_rfkill_exit();
1166         return 0;
1167 }
1168
1169 static int acer_platform_suspend(struct platform_device *dev,
1170 pm_message_t state)
1171 {
1172         u32 value;
1173         struct acer_data *data = &interface->data;
1174
1175         if (!data)
1176                 return -ENOMEM;
1177
1178         if (has_cap(ACER_CAP_MAILLED)) {
1179                 get_u32(&value, ACER_CAP_MAILLED);
1180                 data->mailled = value;
1181         }
1182
1183         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1184                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1185                 data->brightness = value;
1186         }
1187
1188         return 0;
1189 }
1190
1191 static int acer_platform_resume(struct platform_device *device)
1192 {
1193         struct acer_data *data = &interface->data;
1194
1195         if (!data)
1196                 return -ENOMEM;
1197
1198         if (has_cap(ACER_CAP_MAILLED))
1199                 set_u32(data->mailled, ACER_CAP_MAILLED);
1200
1201         if (has_cap(ACER_CAP_BRIGHTNESS))
1202                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1203
1204         return 0;
1205 }
1206
1207 static struct platform_driver acer_platform_driver = {
1208         .driver = {
1209                 .name = "acer-wmi",
1210                 .owner = THIS_MODULE,
1211         },
1212         .probe = acer_platform_probe,
1213         .remove = acer_platform_remove,
1214         .suspend = acer_platform_suspend,
1215         .resume = acer_platform_resume,
1216 };
1217
1218 static struct platform_device *acer_platform_device;
1219
1220 static int remove_sysfs(struct platform_device *device)
1221 {
1222         if (has_cap(ACER_CAP_THREEG))
1223                 device_remove_file(&device->dev, &dev_attr_threeg);
1224
1225         device_remove_file(&device->dev, &dev_attr_interface);
1226
1227         return 0;
1228 }
1229
1230 static int create_sysfs(void)
1231 {
1232         int retval = -ENOMEM;
1233
1234         if (has_cap(ACER_CAP_THREEG)) {
1235                 retval = device_create_file(&acer_platform_device->dev,
1236                         &dev_attr_threeg);
1237                 if (retval)
1238                         goto error_sysfs;
1239         }
1240
1241         retval = device_create_file(&acer_platform_device->dev,
1242                 &dev_attr_interface);
1243         if (retval)
1244                 goto error_sysfs;
1245
1246         return 0;
1247
1248 error_sysfs:
1249                 remove_sysfs(acer_platform_device);
1250         return retval;
1251 }
1252
1253 static void remove_debugfs(void)
1254 {
1255         debugfs_remove(interface->debug.devices);
1256         debugfs_remove(interface->debug.root);
1257 }
1258
1259 static int create_debugfs(void)
1260 {
1261         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1262         if (!interface->debug.root) {
1263                 printk(ACER_ERR "Failed to create debugfs directory");
1264                 return -ENOMEM;
1265         }
1266
1267         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1268                                         interface->debug.root,
1269                                         &interface->debug.wmid_devices);
1270         if (!interface->debug.devices)
1271                 goto error_debugfs;
1272
1273         return 0;
1274
1275 error_debugfs:
1276         remove_debugfs();
1277         return -ENOMEM;
1278 }
1279
1280 static int __init acer_wmi_init(void)
1281 {
1282         int err;
1283
1284         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1285
1286         if (dmi_check_system(acer_blacklist)) {
1287                 printk(ACER_INFO "Blacklisted hardware detected - "
1288                                 "not loading\n");
1289                 return -ENODEV;
1290         }
1291
1292         find_quirks();
1293
1294         /*
1295          * Detect which ACPI-WMI interface we're using.
1296          */
1297         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1298                 interface = &AMW0_V2_interface;
1299
1300         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1301                 interface = &wmid_interface;
1302
1303         if (wmi_has_guid(WMID_GUID2) && interface) {
1304                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1305                         printk(ACER_ERR "Unable to detect available WMID "
1306                                         "devices\n");
1307                         return -ENODEV;
1308                 }
1309         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1310                 printk(ACER_ERR "No WMID device detection method found\n");
1311                 return -ENODEV;
1312         }
1313
1314         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1315                 interface = &AMW0_interface;
1316
1317                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1318                         printk(ACER_ERR "Unable to detect available AMW0 "
1319                                         "devices\n");
1320                         return -ENODEV;
1321                 }
1322         }
1323
1324         if (wmi_has_guid(AMW0_GUID1))
1325                 AMW0_find_mailled();
1326
1327         if (!interface) {
1328                 printk(ACER_ERR "No or unsupported WMI interface, unable to "
1329                                 "load\n");
1330                 return -ENODEV;
1331         }
1332
1333         set_quirks();
1334
1335         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1336                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1337                 printk(ACER_INFO "Brightness must be controlled by "
1338                        "generic video driver\n");
1339         }
1340
1341         err = platform_driver_register(&acer_platform_driver);
1342         if (err) {
1343                 printk(ACER_ERR "Unable to register platform driver.\n");
1344                 goto error_platform_register;
1345         }
1346
1347         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1348         if (!acer_platform_device) {
1349                 err = -ENOMEM;
1350                 goto error_device_alloc;
1351         }
1352
1353         err = platform_device_add(acer_platform_device);
1354         if (err)
1355                 goto error_device_add;
1356
1357         err = create_sysfs();
1358         if (err)
1359                 goto error_create_sys;
1360
1361         if (wmi_has_guid(WMID_GUID2)) {
1362                 interface->debug.wmid_devices = get_wmid_devices();
1363                 err = create_debugfs();
1364                 if (err)
1365                         goto error_create_debugfs;
1366         }
1367
1368         /* Override any initial settings with values from the commandline */
1369         acer_commandline_init();
1370
1371         return 0;
1372
1373 error_create_debugfs:
1374         remove_sysfs(acer_platform_device);
1375 error_create_sys:
1376         platform_device_del(acer_platform_device);
1377 error_device_add:
1378         platform_device_put(acer_platform_device);
1379 error_device_alloc:
1380         platform_driver_unregister(&acer_platform_driver);
1381 error_platform_register:
1382         return err;
1383 }
1384
1385 static void __exit acer_wmi_exit(void)
1386 {
1387         remove_sysfs(acer_platform_device);
1388         remove_debugfs();
1389         platform_device_unregister(acer_platform_device);
1390         platform_driver_unregister(&acer_platform_driver);
1391
1392         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1393         return;
1394 }
1395
1396 module_init(acer_wmi_init);
1397 module_exit(acer_wmi_exit);