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