drivers/platform/x86/acer-wmi.c

   1 /*
   2  *  Acer WMI Laptop Extras
   3  *
   4  *  Copyright (C) 2007-2009     Carlos Corbacho <carlos@strangeworlds.co.uk>
   5  *
   6  *  Based on acer_acpi:
   7  *    Copyright (C) 2005-2007   E.M. Smith
   8  *    Copyright (C) 2007-2008   Carlos Corbacho <cathectic@gmail.com>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/dmi.h>
  30 #include <linux/fb.h>
  31 #include <linux/backlight.h>
  32 #include <linux/leds.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/acpi.h>
  35 #include <linux/i8042.h>
  36 #include <linux/rfkill.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/debugfs.h>
  39 #include <linux/slab.h>
  40
  41 #include <acpi/acpi_drivers.h>
  42
  43 MODULE_AUTHOR("Carlos Corbacho");
  44 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  45 MODULE_LICENSE("GPL");
  46
  47 #define ACER_LOGPREFIX "acer-wmi: "
  48 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
  49 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
  50 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
  51
  52 /*
  53  * Magic Number
  54  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  55  * (it's also used in acerhk when directly accessing the BIOS)
  56  */
  57 #define ACER_AMW0_WRITE 0x9610
  58
  59 /*
  60  * Bit masks for the AMW0 interface
  61  */
  62 #define ACER_AMW0_WIRELESS_MASK  0x35
  63 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  64 #define ACER_AMW0_MAILLED_MASK   0x31
  65
  66 /*
  67  * Method IDs for WMID interface
  68  */
  69 #define ACER_WMID_GET_WIRELESS_METHODID         1
  70 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  71 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  72 #define ACER_WMID_SET_WIRELESS_METHODID         4
  73 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  74 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  75 #define ACER_WMID_GET_THREEG_METHODID           10
  76 #define ACER_WMID_SET_THREEG_METHODID           11
  77
  78 /*
  79  * Acer ACPI method GUIDs
  80  */
  81 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  82 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
  83 #define WMID_GUID1              "6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3"
  84 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
  85
  86 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  87 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
  88
  89 /*
  90  * Interface capability flags
  91  */
  92 #define ACER_CAP_MAILLED                (1<<0)
  93 #define ACER_CAP_WIRELESS               (1<<1)
  94 #define ACER_CAP_BLUETOOTH              (1<<2)
  95 #define ACER_CAP_BRIGHTNESS             (1<<3)
  96 #define ACER_CAP_THREEG                 (1<<4)
  97 #define ACER_CAP_ANY                    (0xFFFFFFFF)
  98
  99 /*
 100  * Interface type flags
 101  */
 102 enum interface_flags {
 103         ACER_AMW0,
 104         ACER_AMW0_V2,
 105         ACER_WMID,
 106 };
 107
 108 #define ACER_DEFAULT_WIRELESS  0
 109 #define ACER_DEFAULT_BLUETOOTH 0
 110 #define ACER_DEFAULT_MAILLED   0
 111 #define ACER_DEFAULT_THREEG    0
 112
 113 static int max_brightness = 0xF;
 114
 115 static int mailled = -1;
 116 static int brightness = -1;
 117 static int threeg = -1;
 118 static int force_series;
 119
 120 module_param(mailled, int, 0444);
 121 module_param(brightness, int, 0444);
 122 module_param(threeg, int, 0444);
 123 module_param(force_series, int, 0444);
 124 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 125 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 126 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 127 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 128
 129 struct acer_data {
 130         int mailled;
 131         int threeg;
 132         int brightness;
 133 };
 134
 135 struct acer_debug {
 136         struct dentry *root;
 137         struct dentry *devices;
 138         u32 wmid_devices;
 139 };
 140
 141 static struct rfkill *wireless_rfkill;
 142 static struct rfkill *bluetooth_rfkill;
 143
 144 /* Each low-level interface must define at least some of the following */
 145 struct wmi_interface {
 146         /* The WMI device type */
 147         u32 type;
 148
 149         /* The capabilities this interface provides */
 150         u32 capability;
 151
 152         /* Private data for the current interface */
 153         struct acer_data data;
 154
 155         /* debugfs entries associated with this interface */
 156         struct acer_debug debug;
 157 };
 158
 159 /* The static interface pointer, points to the currently detected interface */
 160 static struct wmi_interface *interface;
 161
 162 /*
 163  * Embedded Controller quirks
 164  * Some laptops require us to directly access the EC to either enable or query
 165  * features that are not available through WMI.
 166  */
 167
 168 struct quirk_entry {
 169         u8 wireless;
 170         u8 mailled;
 171         s8 brightness;
 172         u8 bluetooth;
 173 };
 174
 175 static struct quirk_entry *quirks;
 176
 177 static void set_quirks(void)
 178 {
 179         if (!interface)
 180                 return;
 181
 182         if (quirks->mailled)
 183                 interface->capability |= ACER_CAP_MAILLED;
 184
 185         if (quirks->brightness)
 186                 interface->capability |= ACER_CAP_BRIGHTNESS;
 187 }
 188
 189 static int dmi_matched(const struct dmi_system_id *dmi)
 190 {
 191         quirks = dmi->driver_data;
 192         return 1;
 193 }
 194
 195 static struct quirk_entry quirk_unknown = {
 196 };
 197
 198 static struct quirk_entry quirk_acer_aspire_1520 = {
 199         .brightness = -1,
 200 };
 201
 202 static struct quirk_entry quirk_acer_travelmate_2490 = {
 203         .mailled = 1,
 204 };
 205
 206 /* This AMW0 laptop has no bluetooth */
 207 static struct quirk_entry quirk_medion_md_98300 = {
 208         .wireless = 1,
 209 };
 210
 211 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 212         .wireless = 2,
 213 };
 214
 215 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 216 static struct dmi_system_id __devinitdata acer_blacklist[] = {
 217         {
 218                 .ident = "Acer Aspire One (SSD)",
 219                 .matches = {
 220                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 221                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
 222                 },
 223         },
 224         {
 225                 .ident = "Acer Aspire One (HDD)",
 226                 .matches = {
 227                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 228                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
 229                 },
 230         },
 231         {}
 232 };
 233
 234 static struct dmi_system_id acer_quirks[] = {
 235         {
 236                 .callback = dmi_matched,
 237                 .ident = "Acer Aspire 1360",
 238                 .matches = {
 239                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 240                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 241                 },
 242                 .driver_data = &quirk_acer_aspire_1520,
 243         },
 244         {
 245                 .callback = dmi_matched,
 246                 .ident = "Acer Aspire 1520",
 247                 .matches = {
 248                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 249                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 250                 },
 251                 .driver_data = &quirk_acer_aspire_1520,
 252         },
 253         {
 254                 .callback = dmi_matched,
 255                 .ident = "Acer Aspire 3100",
 256                 .matches = {
 257                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 258                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 259                 },
 260                 .driver_data = &quirk_acer_travelmate_2490,
 261         },
 262         {
 263                 .callback = dmi_matched,
 264                 .ident = "Acer Aspire 3610",
 265                 .matches = {
 266                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 267                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 268                 },
 269                 .driver_data = &quirk_acer_travelmate_2490,
 270         },
 271         {
 272                 .callback = dmi_matched,
 273                 .ident = "Acer Aspire 5100",
 274                 .matches = {
 275                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 276                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 277                 },
 278                 .driver_data = &quirk_acer_travelmate_2490,
 279         },
 280         {
 281                 .callback = dmi_matched,
 282                 .ident = "Acer Aspire 5610",
 283                 .matches = {
 284                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 285                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 286                 },
 287                 .driver_data = &quirk_acer_travelmate_2490,
 288         },
 289         {
 290                 .callback = dmi_matched,
 291                 .ident = "Acer Aspire 5630",
 292                 .matches = {
 293                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 294                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 295                 },
 296                 .driver_data = &quirk_acer_travelmate_2490,
 297         },
 298         {
 299                 .callback = dmi_matched,
 300                 .ident = "Acer Aspire 5650",
 301                 .matches = {
 302                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 303                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 304                 },
 305                 .driver_data = &quirk_acer_travelmate_2490,
 306         },
 307         {
 308                 .callback = dmi_matched,
 309                 .ident = "Acer Aspire 5680",
 310                 .matches = {
 311                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 312                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 313                 },
 314                 .driver_data = &quirk_acer_travelmate_2490,
 315         },
 316         {
 317                 .callback = dmi_matched,
 318                 .ident = "Acer Aspire 9110",
 319                 .matches = {
 320                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 321                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 322                 },
 323                 .driver_data = &quirk_acer_travelmate_2490,
 324         },
 325         {
 326                 .callback = dmi_matched,
 327                 .ident = "Acer TravelMate 2490",
 328                 .matches = {
 329                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 330                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 331                 },
 332                 .driver_data = &quirk_acer_travelmate_2490,
 333         },
 334         {
 335                 .callback = dmi_matched,
 336                 .ident = "Acer TravelMate 4200",
 337                 .matches = {
 338                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 339                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 340                 },
 341                 .driver_data = &quirk_acer_travelmate_2490,
 342         },
 343         {
 344                 .callback = dmi_matched,
 345                 .ident = "Fujitsu Siemens Amilo Li 1718",
 346                 .matches = {
 347                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 348                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 349                 },
 350                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 351         },
 352         {
 353                 .callback = dmi_matched,
 354                 .ident = "Medion MD 98300",
 355                 .matches = {
 356                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 357                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 358                 },
 359                 .driver_data = &quirk_medion_md_98300,
 360         },
 361         {}
 362 };
 363
 364 /* Find which quirks are needed for a particular vendor/ model pair */
 365 static void find_quirks(void)
 366 {
 367         if (!force_series) {
 368                 dmi_check_system(acer_quirks);
 369         } else if (force_series == 2490) {
 370                 quirks = &quirk_acer_travelmate_2490;
 371         }
 372
 373         if (quirks == NULL)
 374                 quirks = &quirk_unknown;
 375
 376         set_quirks();
 377 }
 378
 379 /*
 380  * General interface convenience methods
 381  */
 382
 383 static bool has_cap(u32 cap)
 384 {
 385         if ((interface->capability & cap) != 0)
 386                 return 1;
 387
 388         return 0;
 389 }
 390
 391 /*
 392  * AMW0 (V1) interface
 393  */
 394 struct wmab_args {
 395         u32 eax;
 396         u32 ebx;
 397         u32 ecx;
 398         u32 edx;
 399 };
 400
 401 struct wmab_ret {
 402         u32 eax;
 403         u32 ebx;
 404         u32 ecx;
 405         u32 edx;
 406         u32 eex;
 407 };
 408
 409 static acpi_status wmab_execute(struct wmab_args *regbuf,
 410 struct acpi_buffer *result)
 411 {
 412         struct acpi_buffer input;
 413         acpi_status status;
 414         input.length = sizeof(struct wmab_args);
 415         input.pointer = (u8 *)regbuf;
 416
 417         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 418
 419         return status;
 420 }
 421
 422 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 423 struct wmi_interface *iface)
 424 {
 425         int err;
 426         u8 result;
 427
 428         switch (cap) {
 429         case ACER_CAP_MAILLED:
 430                 switch (quirks->mailled) {
 431                 default:
 432                         err = ec_read(0xA, &result);
 433                         if (err)
 434                                 return AE_ERROR;
 435                         *value = (result >> 7) & 0x1;
 436                         return AE_OK;
 437                 }
 438                 break;
 439         case ACER_CAP_WIRELESS:
 440                 switch (quirks->wireless) {
 441                 case 1:
 442                         err = ec_read(0x7B, &result);
 443                         if (err)
 444                                 return AE_ERROR;
 445                         *value = result & 0x1;
 446                         return AE_OK;
 447                 case 2:
 448                         err = ec_read(0x71, &result);
 449                         if (err)
 450                                 return AE_ERROR;
 451                         *value = result & 0x1;
 452                         return AE_OK;
 453                 default:
 454                         err = ec_read(0xA, &result);
 455                         if (err)
 456                                 return AE_ERROR;
 457                         *value = (result >> 2) & 0x1;
 458                         return AE_OK;
 459                 }
 460                 break;
 461         case ACER_CAP_BLUETOOTH:
 462                 switch (quirks->bluetooth) {
 463                 default:
 464                         err = ec_read(0xA, &result);
 465                         if (err)
 466                                 return AE_ERROR;
 467                         *value = (result >> 4) & 0x1;
 468                         return AE_OK;
 469                 }
 470                 break;
 471         case ACER_CAP_BRIGHTNESS:
 472                 switch (quirks->brightness) {
 473                 default:
 474                         err = ec_read(0x83, &result);
 475                         if (err)
 476                                 return AE_ERROR;
 477                         *value = result;
 478                         return AE_OK;
 479                 }
 480                 break;
 481         default:
 482                 return AE_ERROR;
 483         }
 484         return AE_OK;
 485 }
 486
 487 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 488 {
 489         struct wmab_args args;
 490
 491         args.eax = ACER_AMW0_WRITE;
 492         args.ebx = value ? (1<<8) : 0;
 493         args.ecx = args.edx = 0;
 494
 495         switch (cap) {
 496         case ACER_CAP_MAILLED:
 497                 if (value > 1)
 498                         return AE_BAD_PARAMETER;
 499                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 500                 break;
 501         case ACER_CAP_WIRELESS:
 502                 if (value > 1)
 503                         return AE_BAD_PARAMETER;
 504                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 505                 break;
 506         case ACER_CAP_BLUETOOTH:
 507                 if (value > 1)
 508                         return AE_BAD_PARAMETER;
 509                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 510                 break;
 511         case ACER_CAP_BRIGHTNESS:
 512                 if (value > max_brightness)
 513                         return AE_BAD_PARAMETER;
 514                 switch (quirks->brightness) {
 515                 default:
 516                         return ec_write(0x83, value);
 517                         break;
 518                 }
 519         default:
 520                 return AE_ERROR;
 521         }
 522
 523         /* Actually do the set */
 524         return wmab_execute(&args, NULL);
 525 }
 526
 527 static acpi_status AMW0_find_mailled(void)
 528 {
 529         struct wmab_args args;
 530         struct wmab_ret ret;
 531         acpi_status status = AE_OK;
 532         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 533         union acpi_object *obj;
 534
 535         args.eax = 0x86;
 536         args.ebx = args.ecx = args.edx = 0;
 537
 538         status = wmab_execute(&args, &out);
 539         if (ACPI_FAILURE(status))
 540                 return status;
 541
 542         obj = (union acpi_object *) out.pointer;
 543         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 544         obj->buffer.length == sizeof(struct wmab_ret)) {
 545                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 546         } else {
 547                 kfree(out.pointer);
 548                 return AE_ERROR;
 549         }
 550
 551         if (ret.eex & 0x1)
 552                 interface->capability |= ACER_CAP_MAILLED;
 553
 554         kfree(out.pointer);
 555
 556         return AE_OK;
 557 }
 558
 559 static acpi_status AMW0_set_capabilities(void)
 560 {
 561         struct wmab_args args;
 562         struct wmab_ret ret;
 563         acpi_status status;
 564         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 565         union acpi_object *obj;
 566
 567         /*
 568          * On laptops with this strange GUID (non Acer), normal probing doesn't
 569          * work.
 570          */
 571         if (wmi_has_guid(AMW0_GUID2)) {
 572                 interface->capability |= ACER_CAP_WIRELESS;
 573                 return AE_OK;
 574         }
 575
 576         args.eax = ACER_AMW0_WRITE;
 577         args.ecx = args.edx = 0;
 578
 579         args.ebx = 0xa2 << 8;
 580         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 581
 582         status = wmab_execute(&args, &out);
 583         if (ACPI_FAILURE(status))
 584                 return status;
 585
 586         obj = out.pointer;
 587         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 588         obj->buffer.length == sizeof(struct wmab_ret)) {
 589                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 590         } else {
 591                 status = AE_ERROR;
 592                 goto out;
 593         }
 594
 595         if (ret.eax & 0x1)
 596                 interface->capability |= ACER_CAP_WIRELESS;
 597
 598         args.ebx = 2 << 8;
 599         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 600
 601         /*
 602          * It's ok to use existing buffer for next wmab_execute call.
 603          * But we need to kfree(out.pointer) if next wmab_execute fail.
 604          */
 605         status = wmab_execute(&args, &out);
 606         if (ACPI_FAILURE(status))
 607                 goto out;
 608
 609         obj = (union acpi_object *) out.pointer;
 610         if (obj && obj->type == ACPI_TYPE_BUFFER
 611         && obj->buffer.length == sizeof(struct wmab_ret)) {
 612                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 613         } else {
 614                 status = AE_ERROR;
 615                 goto out;
 616         }
 617
 618         if (ret.eax & 0x1)
 619                 interface->capability |= ACER_CAP_BLUETOOTH;
 620
 621         /*
 622          * This appears to be safe to enable, since all Wistron based laptops
 623          * appear to use the same EC register for brightness, even if they
 624          * differ for wireless, etc
 625          */
 626         if (quirks->brightness >= 0)
 627                 interface->capability |= ACER_CAP_BRIGHTNESS;
 628
 629         status = AE_OK;
 630 out:
 631         kfree(out.pointer);
 632         return status;
 633 }
 634
 635 static struct wmi_interface AMW0_interface = {
 636         .type = ACER_AMW0,
 637 };
 638
 639 static struct wmi_interface AMW0_V2_interface = {
 640         .type = ACER_AMW0_V2,
 641 };
 642
 643 /*
 644  * New interface (The WMID interface)
 645  */
 646 static acpi_status
 647 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 648 {
 649         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 650         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 651         union acpi_object *obj;
 652         u32 tmp;
 653         acpi_status status;
 654
 655         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 656
 657         if (ACPI_FAILURE(status))
 658                 return status;
 659
 660         obj = (union acpi_object *) result.pointer;
 661         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 662                 obj->buffer.length == sizeof(u32)) {
 663                 tmp = *((u32 *) obj->buffer.pointer);
 664         } else {
 665                 tmp = 0;
 666         }
 667
 668         if (out)
 669                 *out = tmp;
 670
 671         kfree(result.pointer);
 672
 673         return status;
 674 }
 675
 676 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 677 struct wmi_interface *iface)
 678 {
 679         acpi_status status;
 680         u8 tmp;
 681         u32 result, method_id = 0;
 682
 683         switch (cap) {
 684         case ACER_CAP_WIRELESS:
 685                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 686                 break;
 687         case ACER_CAP_BLUETOOTH:
 688                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 689                 break;
 690         case ACER_CAP_BRIGHTNESS:
 691                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 692                 break;
 693         case ACER_CAP_THREEG:
 694                 method_id = ACER_WMID_GET_THREEG_METHODID;
 695                 break;
 696         case ACER_CAP_MAILLED:
 697                 if (quirks->mailled == 1) {
 698                         ec_read(0x9f, &tmp);
 699                         *value = tmp & 0x1;
 700                         return 0;
 701                 }
 702         default:
 703                 return AE_ERROR;
 704         }
 705         status = WMI_execute_u32(method_id, 0, &result);
 706
 707         if (ACPI_SUCCESS(status))
 708                 *value = (u8)result;
 709
 710         return status;
 711 }
 712
 713 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 714 {
 715         u32 method_id = 0;
 716         char param;
 717
 718         switch (cap) {
 719         case ACER_CAP_BRIGHTNESS:
 720                 if (value > max_brightness)
 721                         return AE_BAD_PARAMETER;
 722                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 723                 break;
 724         case ACER_CAP_WIRELESS:
 725                 if (value > 1)
 726                         return AE_BAD_PARAMETER;
 727                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 728                 break;
 729         case ACER_CAP_BLUETOOTH:
 730                 if (value > 1)
 731                         return AE_BAD_PARAMETER;
 732                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 733                 break;
 734         case ACER_CAP_THREEG:
 735                 if (value > 1)
 736                         return AE_BAD_PARAMETER;
 737                 method_id = ACER_WMID_SET_THREEG_METHODID;
 738                 break;
 739         case ACER_CAP_MAILLED:
 740                 if (value > 1)
 741                         return AE_BAD_PARAMETER;
 742                 if (quirks->mailled == 1) {
 743                         param = value ? 0x92 : 0x93;
 744                         i8042_lock_chip();
 745                         i8042_command(&param, 0x1059);
 746                         i8042_unlock_chip();
 747                         return 0;
 748                 }
 749                 break;
 750         default:
 751                 return AE_ERROR;
 752         }
 753         return WMI_execute_u32(method_id, (u32)value, NULL);
 754 }
 755
 756 static acpi_status WMID_set_capabilities(void)
 757 {
 758         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 759         union acpi_object *obj;
 760         acpi_status status;
 761         u32 devices;
 762
 763         status = wmi_query_block(WMID_GUID2, 1, &out);
 764         if (ACPI_FAILURE(status))
 765                 return status;
 766
 767         obj = (union acpi_object *) out.pointer;
 768         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 769                 obj->buffer.length == sizeof(u32)) {
 770                 devices = *((u32 *) obj->buffer.pointer);
 771         } else {
 772                 kfree(out.pointer);
 773                 return AE_ERROR;
 774         }
 775
 776         /* Not sure on the meaning of the relevant bits yet to detect these */
 777         interface->capability |= ACER_CAP_WIRELESS;
 778         interface->capability |= ACER_CAP_THREEG;
 779
 780         /* WMID always provides brightness methods */
 781         interface->capability |= ACER_CAP_BRIGHTNESS;
 782
 783         if (devices & 0x10)
 784                 interface->capability |= ACER_CAP_BLUETOOTH;
 785
 786         if (!(devices & 0x20))
 787                 max_brightness = 0x9;
 788
 789         kfree(out.pointer);
 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_properties props;
 926         struct backlight_device *bd;
 927
 928         memset(&props, 0, sizeof(struct backlight_properties));
 929         props.max_brightness = max_brightness;
 930         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
 931                                        &props);
 932         if (IS_ERR(bd)) {
 933                 printk(ACER_ERR "Could not register Acer backlight device\n");
 934                 acer_backlight_device = NULL;
 935                 return PTR_ERR(bd);
 936         }
 937
 938         acer_backlight_device = bd;
 939
 940         bd->props.power = FB_BLANK_UNBLANK;
 941         bd->props.brightness = read_brightness(bd);
 942         backlight_update_status(bd);
 943         return 0;
 944 }
 945
 946 static void acer_backlight_exit(void)
 947 {
 948         backlight_device_unregister(acer_backlight_device);
 949 }
 950
 951 /*
 952  * Rfkill devices
 953  */
 954 static void acer_rfkill_update(struct work_struct *ignored);
 955 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
 956 static void acer_rfkill_update(struct work_struct *ignored)
 957 {
 958         u32 state;
 959         acpi_status status;
 960
 961         status = get_u32(&state, ACER_CAP_WIRELESS);
 962         if (ACPI_SUCCESS(status))
 963                 rfkill_set_sw_state(wireless_rfkill, !state);
 964
 965         if (has_cap(ACER_CAP_BLUETOOTH)) {
 966                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
 967                 if (ACPI_SUCCESS(status))
 968                         rfkill_set_sw_state(bluetooth_rfkill, !state);
 969         }
 970
 971         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
 972 }
 973
 974 static int acer_rfkill_set(void *data, bool blocked)
 975 {
 976         acpi_status status;
 977         u32 cap = (unsigned long)data;
 978         status = set_u32(!blocked, cap);
 979         if (ACPI_FAILURE(status))
 980                 return -ENODEV;
 981         return 0;
 982 }
 983
 984 static const struct rfkill_ops acer_rfkill_ops = {
 985         .set_block = acer_rfkill_set,
 986 };
 987
 988 static struct rfkill *acer_rfkill_register(struct device *dev,
 989                                            enum rfkill_type type,
 990                                            char *name, u32 cap)
 991 {
 992         int err;
 993         struct rfkill *rfkill_dev;
 994
 995         rfkill_dev = rfkill_alloc(name, dev, type,
 996                                   &acer_rfkill_ops,
 997                                   (void *)(unsigned long)cap);
 998         if (!rfkill_dev)
 999                 return ERR_PTR(-ENOMEM);
1000
1001         err = rfkill_register(rfkill_dev);
1002         if (err) {
1003                 rfkill_destroy(rfkill_dev);
1004                 return ERR_PTR(err);
1005         }
1006         return rfkill_dev;
1007 }
1008
1009 static int acer_rfkill_init(struct device *dev)
1010 {
1011         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1012                 "acer-wireless", ACER_CAP_WIRELESS);
1013         if (IS_ERR(wireless_rfkill))
1014                 return PTR_ERR(wireless_rfkill);
1015
1016         if (has_cap(ACER_CAP_BLUETOOTH)) {
1017                 bluetooth_rfkill = acer_rfkill_register(dev,
1018                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1019                         ACER_CAP_BLUETOOTH);
1020                 if (IS_ERR(bluetooth_rfkill)) {
1021                         rfkill_unregister(wireless_rfkill);
1022                         rfkill_destroy(wireless_rfkill);
1023                         return PTR_ERR(bluetooth_rfkill);
1024                 }
1025         }
1026
1027         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1028
1029         return 0;
1030 }
1031
1032 static void acer_rfkill_exit(void)
1033 {
1034         cancel_delayed_work_sync(&acer_rfkill_work);
1035
1036         rfkill_unregister(wireless_rfkill);
1037         rfkill_destroy(wireless_rfkill);
1038
1039         if (has_cap(ACER_CAP_BLUETOOTH)) {
1040                 rfkill_unregister(bluetooth_rfkill);
1041                 rfkill_destroy(bluetooth_rfkill);
1042         }
1043         return;
1044 }
1045
1046 /*
1047  * sysfs interface
1048  */
1049 static ssize_t show_bool_threeg(struct device *dev,
1050         struct device_attribute *attr, char *buf)
1051 {
1052         u32 result; \
1053         acpi_status status = get_u32(&result, ACER_CAP_THREEG);
1054         if (ACPI_SUCCESS(status))
1055                 return sprintf(buf, "%u\n", result);
1056         return sprintf(buf, "Read error\n");
1057 }
1058
1059 static ssize_t set_bool_threeg(struct device *dev,
1060         struct device_attribute *attr, const char *buf, size_t count)
1061 {
1062         u32 tmp = simple_strtoul(buf, NULL, 10);
1063         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1064                 if (ACPI_FAILURE(status))
1065                         return -EINVAL;
1066         return count;
1067 }
1068 static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
1069         set_bool_threeg);
1070
1071 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1072         char *buf)
1073 {
1074         switch (interface->type) {
1075         case ACER_AMW0:
1076                 return sprintf(buf, "AMW0\n");
1077         case ACER_AMW0_V2:
1078                 return sprintf(buf, "AMW0 v2\n");
1079         case ACER_WMID:
1080                 return sprintf(buf, "WMID\n");
1081         default:
1082                 return sprintf(buf, "Error!\n");
1083         }
1084 }
1085
1086 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1087
1088 /*
1089  * debugfs functions
1090  */
1091 static u32 get_wmid_devices(void)
1092 {
1093         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1094         union acpi_object *obj;
1095         acpi_status status;
1096         u32 devices = 0;
1097
1098         status = wmi_query_block(WMID_GUID2, 1, &out);
1099         if (ACPI_FAILURE(status))
1100                 return 0;
1101
1102         obj = (union acpi_object *) out.pointer;
1103         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1104                 obj->buffer.length == sizeof(u32)) {
1105                 devices = *((u32 *) obj->buffer.pointer);
1106         }
1107
1108         kfree(out.pointer);
1109         return devices;
1110 }
1111
1112 /*
1113  * Platform device
1114  */
1115 static int __devinit acer_platform_probe(struct platform_device *device)
1116 {
1117         int err;
1118
1119         if (has_cap(ACER_CAP_MAILLED)) {
1120                 err = acer_led_init(&device->dev);
1121                 if (err)
1122                         goto error_mailled;
1123         }
1124
1125         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1126                 err = acer_backlight_init(&device->dev);
1127                 if (err)
1128                         goto error_brightness;
1129         }
1130
1131         err = acer_rfkill_init(&device->dev);
1132         if (err)
1133                 goto error_rfkill;
1134
1135         return err;
1136
1137 error_rfkill:
1138         if (has_cap(ACER_CAP_BRIGHTNESS))
1139                 acer_backlight_exit();
1140 error_brightness:
1141         if (has_cap(ACER_CAP_MAILLED))
1142                 acer_led_exit();
1143 error_mailled:
1144         return err;
1145 }
1146
1147 static int acer_platform_remove(struct platform_device *device)
1148 {
1149         if (has_cap(ACER_CAP_MAILLED))
1150                 acer_led_exit();
1151         if (has_cap(ACER_CAP_BRIGHTNESS))
1152                 acer_backlight_exit();
1153
1154         acer_rfkill_exit();
1155         return 0;
1156 }
1157
1158 static int acer_platform_suspend(struct platform_device *dev,
1159 pm_message_t state)
1160 {
1161         u32 value;
1162         struct acer_data *data = &interface->data;
1163
1164         if (!data)
1165                 return -ENOMEM;
1166
1167         if (has_cap(ACER_CAP_MAILLED)) {
1168                 get_u32(&value, ACER_CAP_MAILLED);
1169                 data->mailled = value;
1170         }
1171
1172         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1173                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1174                 data->brightness = value;
1175         }
1176
1177         return 0;
1178 }
1179
1180 static int acer_platform_resume(struct platform_device *device)
1181 {
1182         struct acer_data *data = &interface->data;
1183
1184         if (!data)
1185                 return -ENOMEM;
1186
1187         if (has_cap(ACER_CAP_MAILLED))
1188                 set_u32(data->mailled, ACER_CAP_MAILLED);
1189
1190         if (has_cap(ACER_CAP_BRIGHTNESS))
1191                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1192
1193         return 0;
1194 }
1195
1196 static struct platform_driver acer_platform_driver = {
1197         .driver = {
1198                 .name = "acer-wmi",
1199                 .owner = THIS_MODULE,
1200         },
1201         .probe = acer_platform_probe,
1202         .remove = acer_platform_remove,
1203         .suspend = acer_platform_suspend,
1204         .resume = acer_platform_resume,
1205 };
1206
1207 static struct platform_device *acer_platform_device;
1208
1209 static int remove_sysfs(struct platform_device *device)
1210 {
1211         if (has_cap(ACER_CAP_THREEG))
1212                 device_remove_file(&device->dev, &dev_attr_threeg);
1213
1214         device_remove_file(&device->dev, &dev_attr_interface);
1215
1216         return 0;
1217 }
1218
1219 static int create_sysfs(void)
1220 {
1221         int retval = -ENOMEM;
1222
1223         if (has_cap(ACER_CAP_THREEG)) {
1224                 retval = device_create_file(&acer_platform_device->dev,
1225                         &dev_attr_threeg);
1226                 if (retval)
1227                         goto error_sysfs;
1228         }
1229
1230         retval = device_create_file(&acer_platform_device->dev,
1231                 &dev_attr_interface);
1232         if (retval)
1233                 goto error_sysfs;
1234
1235         return 0;
1236
1237 error_sysfs:
1238                 remove_sysfs(acer_platform_device);
1239         return retval;
1240 }
1241
1242 static void remove_debugfs(void)
1243 {
1244         debugfs_remove(interface->debug.devices);
1245         debugfs_remove(interface->debug.root);
1246 }
1247
1248 static int create_debugfs(void)
1249 {
1250         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1251         if (!interface->debug.root) {
1252                 printk(ACER_ERR "Failed to create debugfs directory");
1253                 return -ENOMEM;
1254         }
1255
1256         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1257                                         interface->debug.root,
1258                                         &interface->debug.wmid_devices);
1259         if (!interface->debug.devices)
1260                 goto error_debugfs;
1261
1262         return 0;
1263
1264 error_debugfs:
1265         remove_debugfs();
1266         return -ENOMEM;
1267 }
1268
1269 static int __init acer_wmi_init(void)
1270 {
1271         int err;
1272
1273         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1274
1275         if (dmi_check_system(acer_blacklist)) {
1276                 printk(ACER_INFO "Blacklisted hardware detected - "
1277                                 "not loading\n");
1278                 return -ENODEV;
1279         }
1280
1281         find_quirks();
1282
1283         /*
1284          * Detect which ACPI-WMI interface we're using.
1285          */
1286         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1287                 interface = &AMW0_V2_interface;
1288
1289         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1290                 interface = &wmid_interface;
1291
1292         if (wmi_has_guid(WMID_GUID2) && interface) {
1293                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1294                         printk(ACER_ERR "Unable to detect available WMID "
1295                                         "devices\n");
1296                         return -ENODEV;
1297                 }
1298         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1299                 printk(ACER_ERR "No WMID device detection method found\n");
1300                 return -ENODEV;
1301         }
1302
1303         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1304                 interface = &AMW0_interface;
1305
1306                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1307                         printk(ACER_ERR "Unable to detect available AMW0 "
1308                                         "devices\n");
1309                         return -ENODEV;
1310                 }
1311         }
1312
1313         if (wmi_has_guid(AMW0_GUID1))
1314                 AMW0_find_mailled();
1315
1316         if (!interface) {
1317                 printk(ACER_INFO "No or unsupported WMI interface, unable to "
1318                                 "load\n");
1319                 return -ENODEV;
1320         }
1321
1322         set_quirks();
1323
1324         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1325                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1326                 printk(ACER_INFO "Brightness must be controlled by "
1327                        "generic video driver\n");
1328         }
1329
1330         err = platform_driver_register(&acer_platform_driver);
1331         if (err) {
1332                 printk(ACER_ERR "Unable to register platform driver.\n");
1333                 goto error_platform_register;
1334         }
1335
1336         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1337         if (!acer_platform_device) {
1338                 err = -ENOMEM;
1339                 goto error_device_alloc;
1340         }
1341
1342         err = platform_device_add(acer_platform_device);
1343         if (err)
1344                 goto error_device_add;
1345
1346         err = create_sysfs();
1347         if (err)
1348                 goto error_create_sys;
1349
1350         if (wmi_has_guid(WMID_GUID2)) {
1351                 interface->debug.wmid_devices = get_wmid_devices();
1352                 err = create_debugfs();
1353                 if (err)
1354                         goto error_create_debugfs;
1355         }
1356
1357         /* Override any initial settings with values from the commandline */
1358         acer_commandline_init();
1359
1360         return 0;
1361
1362 error_create_debugfs:
1363         remove_sysfs(acer_platform_device);
1364 error_create_sys:
1365         platform_device_del(acer_platform_device);
1366 error_device_add:
1367         platform_device_put(acer_platform_device);
1368 error_device_alloc:
1369         platform_driver_unregister(&acer_platform_driver);
1370 error_platform_register:
1371         return err;
1372 }
1373
1374 static void __exit acer_wmi_exit(void)
1375 {
1376         remove_sysfs(acer_platform_device);
1377         remove_debugfs();
1378         platform_device_unregister(acer_platform_device);
1379         platform_driver_unregister(&acer_platform_driver);
1380
1381         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1382         return;
1383 }
1384
1385 module_init(acer_wmi_init);
1386 module_exit(acer_wmi_exit);