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