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