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 #define ACER_WMI_VERSION        "0.1"
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/dmi.h>
  32 #include <linux/fb.h>
  33 #include <linux/backlight.h>
  34 #include <linux/leds.h>
  35 #include <linux/platform_device.h>
  36 #include <linux/acpi.h>
  37 #include <linux/i8042.h>
  38
  39 #include <acpi/acpi_drivers.h>
  40
  41 MODULE_AUTHOR("Carlos Corbacho");
  42 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  43 MODULE_LICENSE("GPL");
  44
  45 #define ACER_LOGPREFIX "acer-wmi: "
  46 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
  47 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
  48 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
  49
  50 /*
  51  * The following defines quirks to get some specific functions to work
  52  * which are known to not be supported over ACPI-WMI (such as the mail LED
  53  * on WMID based Acer's)
  54  */
  55 struct acer_quirks {
  56         const char *vendor;
  57         const char *model;
  58         u16 quirks;
  59 };
  60
  61 /*
  62  * Magic Number
  63  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  64  * (it's also used in acerhk when directly accessing the BIOS)
  65  */
  66 #define ACER_AMW0_WRITE 0x9610
  67
  68 /*
  69  * Bit masks for the AMW0 interface
  70  */
  71 #define ACER_AMW0_WIRELESS_MASK  0x35
  72 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  73 #define ACER_AMW0_MAILLED_MASK   0x31
  74
  75 /*
  76  * Method IDs for WMID interface
  77  */
  78 #define ACER_WMID_GET_WIRELESS_METHODID         1
  79 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  80 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  81 #define ACER_WMID_SET_WIRELESS_METHODID         4
  82 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  83 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  84 #define ACER_WMID_GET_THREEG_METHODID           10
  85 #define ACER_WMID_SET_THREEG_METHODID           11
  86
  87 /*
  88  * Acer ACPI method GUIDs
  89  */
  90 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  91 #define WMID_GUID1              "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
  92 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
  93
  94 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  95 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
  96
  97 /* Temporary workaround until the WMI sysfs interface goes in */
  98 MODULE_ALIAS("dmi:*:*Acer*:*:");
  99
 100 /*
 101  * Interface capability flags
 102  */
 103 #define ACER_CAP_MAILLED                (1<<0)
 104 #define ACER_CAP_WIRELESS               (1<<1)
 105 #define ACER_CAP_BLUETOOTH              (1<<2)
 106 #define ACER_CAP_BRIGHTNESS             (1<<3)
 107 #define ACER_CAP_THREEG                 (1<<4)
 108 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 109
 110 /*
 111  * Interface type flags
 112  */
 113 enum interface_flags {
 114         ACER_AMW0,
 115         ACER_AMW0_V2,
 116         ACER_WMID,
 117 };
 118
 119 #define ACER_DEFAULT_WIRELESS  0
 120 #define ACER_DEFAULT_BLUETOOTH 0
 121 #define ACER_DEFAULT_MAILLED   0
 122 #define ACER_DEFAULT_THREEG    0
 123
 124 static int max_brightness = 0xF;
 125
 126 static int wireless = -1;
 127 static int bluetooth = -1;
 128 static int mailled = -1;
 129 static int brightness = -1;
 130 static int threeg = -1;
 131 static int force_series;
 132
 133 module_param(mailled, int, 0444);
 134 module_param(wireless, int, 0444);
 135 module_param(bluetooth, int, 0444);
 136 module_param(brightness, int, 0444);
 137 module_param(threeg, int, 0444);
 138 module_param(force_series, int, 0444);
 139 MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
 140 MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
 141 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 142 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 143 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 144 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 145
 146 struct acer_data {
 147         int mailled;
 148         int wireless;
 149         int bluetooth;
 150         int threeg;
 151         int brightness;
 152 };
 153
 154 /* Each low-level interface must define at least some of the following */
 155 struct wmi_interface {
 156         /* The WMI device type */
 157         u32 type;
 158
 159         /* The capabilities this interface provides */
 160         u32 capability;
 161
 162         /* Private data for the current interface */
 163         struct acer_data data;
 164 };
 165
 166 /* The static interface pointer, points to the currently detected interface */
 167 static struct wmi_interface *interface;
 168
 169 /*
 170  * Embedded Controller quirks
 171  * Some laptops require us to directly access the EC to either enable or query
 172  * features that are not available through WMI.
 173  */
 174
 175 struct quirk_entry {
 176         u8 wireless;
 177         u8 mailled;
 178         s8 brightness;
 179         u8 bluetooth;
 180 };
 181
 182 static struct quirk_entry *quirks;
 183
 184 static void set_quirks(void)
 185 {
 186         if (quirks->mailled)
 187                 interface->capability |= ACER_CAP_MAILLED;
 188
 189         if (quirks->brightness)
 190                 interface->capability |= ACER_CAP_BRIGHTNESS;
 191 }
 192
 193 static int dmi_matched(const struct dmi_system_id *dmi)
 194 {
 195         quirks = dmi->driver_data;
 196         return 0;
 197 }
 198
 199 static struct quirk_entry quirk_unknown = {
 200 };
 201
 202 static struct quirk_entry quirk_acer_aspire_1520 = {
 203         .brightness = -1,
 204 };
 205
 206 static struct quirk_entry quirk_acer_travelmate_2490 = {
 207         .mailled = 1,
 208 };
 209
 210 /* This AMW0 laptop has no bluetooth */
 211 static struct quirk_entry quirk_medion_md_98300 = {
 212         .wireless = 1,
 213 };
 214
 215 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 216         .wireless = 2,
 217 };
 218
 219 static struct dmi_system_id acer_quirks[] = {
 220         {
 221                 .callback = dmi_matched,
 222                 .ident = "Acer Aspire 1360",
 223                 .matches = {
 224                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 225                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 226                 },
 227                 .driver_data = &quirk_acer_aspire_1520,
 228         },
 229         {
 230                 .callback = dmi_matched,
 231                 .ident = "Acer Aspire 1520",
 232                 .matches = {
 233                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 234                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 235                 },
 236                 .driver_data = &quirk_acer_aspire_1520,
 237         },
 238         {
 239                 .callback = dmi_matched,
 240                 .ident = "Acer Aspire 3100",
 241                 .matches = {
 242                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 243                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 244                 },
 245                 .driver_data = &quirk_acer_travelmate_2490,
 246         },
 247         {
 248                 .callback = dmi_matched,
 249                 .ident = "Acer Aspire 3610",
 250                 .matches = {
 251                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 252                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 253                 },
 254                 .driver_data = &quirk_acer_travelmate_2490,
 255         },
 256         {
 257                 .callback = dmi_matched,
 258                 .ident = "Acer Aspire 5100",
 259                 .matches = {
 260                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 261                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 262                 },
 263                 .driver_data = &quirk_acer_travelmate_2490,
 264         },
 265         {
 266                 .callback = dmi_matched,
 267                 .ident = "Acer Aspire 5610",
 268                 .matches = {
 269                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 270                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 271                 },
 272                 .driver_data = &quirk_acer_travelmate_2490,
 273         },
 274         {
 275                 .callback = dmi_matched,
 276                 .ident = "Acer Aspire 5630",
 277                 .matches = {
 278                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 279                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 280                 },
 281                 .driver_data = &quirk_acer_travelmate_2490,
 282         },
 283         {
 284                 .callback = dmi_matched,
 285                 .ident = "Acer Aspire 5650",
 286                 .matches = {
 287                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 288                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 289                 },
 290                 .driver_data = &quirk_acer_travelmate_2490,
 291         },
 292         {
 293                 .callback = dmi_matched,
 294                 .ident = "Acer Aspire 5680",
 295                 .matches = {
 296                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 297                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 298                 },
 299                 .driver_data = &quirk_acer_travelmate_2490,
 300         },
 301         {
 302                 .callback = dmi_matched,
 303                 .ident = "Acer Aspire 9110",
 304                 .matches = {
 305                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 306                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 307                 },
 308                 .driver_data = &quirk_acer_travelmate_2490,
 309         },
 310         {
 311                 .callback = dmi_matched,
 312                 .ident = "Acer TravelMate 2490",
 313                 .matches = {
 314                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 315                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 316                 },
 317                 .driver_data = &quirk_acer_travelmate_2490,
 318         },
 319         {
 320                 .callback = dmi_matched,
 321                 .ident = "Acer TravelMate 4200",
 322                 .matches = {
 323                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 324                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 325                 },
 326                 .driver_data = &quirk_acer_travelmate_2490,
 327         },
 328         {
 329                 .callback = dmi_matched,
 330                 .ident = "Fujitsu Siemens Amilo Li 1718",
 331                 .matches = {
 332                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 333                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 334                 },
 335                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 336         },
 337         {
 338                 .callback = dmi_matched,
 339                 .ident = "Medion MD 98300",
 340                 .matches = {
 341                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 342                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 343                 },
 344                 .driver_data = &quirk_medion_md_98300,
 345         },
 346         {}
 347 };
 348
 349 /* Find which quirks are needed for a particular vendor/ model pair */
 350 static void find_quirks(void)
 351 {
 352         if (!force_series) {
 353                 dmi_check_system(acer_quirks);
 354         } else if (force_series == 2490) {
 355                 quirks = &quirk_acer_travelmate_2490;
 356         }
 357
 358         if (quirks == NULL)
 359                 quirks = &quirk_unknown;
 360
 361         set_quirks();
 362 }
 363
 364 /*
 365  * General interface convenience methods
 366  */
 367
 368 static bool has_cap(u32 cap)
 369 {
 370         if ((interface->capability & cap) != 0)
 371                 return 1;
 372
 373         return 0;
 374 }
 375
 376 /*
 377  * AMW0 (V1) interface
 378  */
 379 struct wmab_args {
 380         u32 eax;
 381         u32 ebx;
 382         u32 ecx;
 383         u32 edx;
 384 };
 385
 386 struct wmab_ret {
 387         u32 eax;
 388         u32 ebx;
 389         u32 ecx;
 390         u32 edx;
 391         u32 eex;
 392 };
 393
 394 static acpi_status wmab_execute(struct wmab_args *regbuf,
 395 struct acpi_buffer *result)
 396 {
 397         struct acpi_buffer input;
 398         acpi_status status;
 399         input.length = sizeof(struct wmab_args);
 400         input.pointer = (u8 *)regbuf;
 401
 402         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 403
 404         return status;
 405 }
 406
 407 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 408 struct wmi_interface *iface)
 409 {
 410         int err;
 411         u8 result;
 412
 413         switch (cap) {
 414         case ACER_CAP_MAILLED:
 415                 switch (quirks->mailled) {
 416                 default:
 417                         err = ec_read(0xA, &result);
 418                         if (err)
 419                                 return AE_ERROR;
 420                         *value = (result >> 7) & 0x1;
 421                         return AE_OK;
 422                 }
 423                 break;
 424         case ACER_CAP_WIRELESS:
 425                 switch (quirks->wireless) {
 426                 case 1:
 427                         err = ec_read(0x7B, &result);
 428                         if (err)
 429                                 return AE_ERROR;
 430                         *value = result & 0x1;
 431                         return AE_OK;
 432                 case 2:
 433                         err = ec_read(0x71, &result);
 434                         if (err)
 435                                 return AE_ERROR;
 436                         *value = result & 0x1;
 437                         return AE_OK;
 438                 default:
 439                         err = ec_read(0xA, &result);
 440                         if (err)
 441                                 return AE_ERROR;
 442                         *value = (result >> 2) & 0x1;
 443                         return AE_OK;
 444                 }
 445                 break;
 446         case ACER_CAP_BLUETOOTH:
 447                 switch (quirks->bluetooth) {
 448                 default:
 449                         err = ec_read(0xA, &result);
 450                         if (err)
 451                                 return AE_ERROR;
 452                         *value = (result >> 4) & 0x1;
 453                         return AE_OK;
 454                 }
 455                 break;
 456         case ACER_CAP_BRIGHTNESS:
 457                 switch (quirks->brightness) {
 458                 default:
 459                         err = ec_read(0x83, &result);
 460                         if (err)
 461                                 return AE_ERROR;
 462                         *value = result;
 463                         return AE_OK;
 464                 }
 465                 break;
 466         default:
 467                 return AE_BAD_ADDRESS;
 468         }
 469         return AE_OK;
 470 }
 471
 472 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 473 {
 474         struct wmab_args args;
 475
 476         args.eax = ACER_AMW0_WRITE;
 477         args.ebx = value ? (1<<8) : 0;
 478         args.ecx = args.edx = 0;
 479
 480         switch (cap) {
 481         case ACER_CAP_MAILLED:
 482                 if (value > 1)
 483                         return AE_BAD_PARAMETER;
 484                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 485                 break;
 486         case ACER_CAP_WIRELESS:
 487                 if (value > 1)
 488                         return AE_BAD_PARAMETER;
 489                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 490                 break;
 491         case ACER_CAP_BLUETOOTH:
 492                 if (value > 1)
 493                         return AE_BAD_PARAMETER;
 494                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 495                 break;
 496         case ACER_CAP_BRIGHTNESS:
 497                 if (value > max_brightness)
 498                         return AE_BAD_PARAMETER;
 499                 switch (quirks->brightness) {
 500                 default:
 501                         return ec_write(0x83, value);
 502                         break;
 503                 }
 504         default:
 505                 return AE_BAD_ADDRESS;
 506         }
 507
 508         /* Actually do the set */
 509         return wmab_execute(&args, NULL);
 510 }
 511
 512 static acpi_status AMW0_find_mailled(void)
 513 {
 514         struct wmab_args args;
 515         struct wmab_ret ret;
 516         acpi_status status = AE_OK;
 517         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 518         union acpi_object *obj;
 519
 520         args.eax = 0x86;
 521         args.ebx = args.ecx = args.edx = 0;
 522
 523         status = wmab_execute(&args, &out);
 524         if (ACPI_FAILURE(status))
 525                 return status;
 526
 527         obj = (union acpi_object *) out.pointer;
 528         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 529         obj->buffer.length == sizeof(struct wmab_ret)) {
 530                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 531         } else {
 532                 return AE_ERROR;
 533         }
 534
 535         if (ret.eex & 0x1)
 536                 interface->capability |= ACER_CAP_MAILLED;
 537
 538         kfree(out.pointer);
 539
 540         return AE_OK;
 541 }
 542
 543 static acpi_status AMW0_set_capabilities(void)
 544 {
 545         struct wmab_args args;
 546         struct wmab_ret ret;
 547         acpi_status status = AE_OK;
 548         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 549         union acpi_object *obj;
 550
 551         args.eax = ACER_AMW0_WRITE;
 552         args.ecx = args.edx = 0;
 553
 554         args.ebx = 0xa2 << 8;
 555         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 556
 557         status = wmab_execute(&args, &out);
 558         if (ACPI_FAILURE(status))
 559                 return status;
 560
 561         obj = (union acpi_object *) out.pointer;
 562         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 563         obj->buffer.length == sizeof(struct wmab_ret)) {
 564                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 565         } else {
 566                 return AE_ERROR;
 567         }
 568
 569         if (ret.eax & 0x1)
 570                 interface->capability |= ACER_CAP_WIRELESS;
 571
 572         args.ebx = 2 << 8;
 573         args.ebx |= ACER_AMW0_BLUETOOTH_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_BLUETOOTH;
 589
 590         kfree(out.pointer);
 591
 592         /*
 593          * This appears to be safe to enable, since all Wistron based laptops
 594          * appear to use the same EC register for brightness, even if they
 595          * differ for wireless, etc
 596          */
 597         if (quirks->brightness >= 0)
 598                 interface->capability |= ACER_CAP_BRIGHTNESS;
 599
 600         return AE_OK;
 601 }
 602
 603 static struct wmi_interface AMW0_interface = {
 604         .type = ACER_AMW0,
 605 };
 606
 607 static struct wmi_interface AMW0_V2_interface = {
 608         .type = ACER_AMW0_V2,
 609 };
 610
 611 /*
 612  * New interface (The WMID interface)
 613  */
 614 static acpi_status
 615 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 616 {
 617         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 618         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 619         union acpi_object *obj;
 620         u32 tmp;
 621         acpi_status status;
 622
 623         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 624
 625         if (ACPI_FAILURE(status))
 626                 return status;
 627
 628         obj = (union acpi_object *) result.pointer;
 629         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 630                 obj->buffer.length == sizeof(u32)) {
 631                 tmp = *((u32 *) obj->buffer.pointer);
 632         } else {
 633                 tmp = 0;
 634         }
 635
 636         if (out)
 637                 *out = tmp;
 638
 639         kfree(result.pointer);
 640
 641         return status;
 642 }
 643
 644 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 645 struct wmi_interface *iface)
 646 {
 647         acpi_status status;
 648         u8 tmp;
 649         u32 result, method_id = 0;
 650
 651         switch (cap) {
 652         case ACER_CAP_WIRELESS:
 653                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 654                 break;
 655         case ACER_CAP_BLUETOOTH:
 656                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 657                 break;
 658         case ACER_CAP_BRIGHTNESS:
 659                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 660                 break;
 661         case ACER_CAP_THREEG:
 662                 method_id = ACER_WMID_GET_THREEG_METHODID;
 663                 break;
 664         case ACER_CAP_MAILLED:
 665                 if (quirks->mailled == 1) {
 666                         ec_read(0x9f, &tmp);
 667                         *value = tmp & 0x1;
 668                         return 0;
 669                 }
 670         default:
 671                 return AE_BAD_ADDRESS;
 672         }
 673         status = WMI_execute_u32(method_id, 0, &result);
 674
 675         if (ACPI_SUCCESS(status))
 676                 *value = (u8)result;
 677
 678         return status;
 679 }
 680
 681 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 682 {
 683         u32 method_id = 0;
 684         char param;
 685
 686         switch (cap) {
 687         case ACER_CAP_BRIGHTNESS:
 688                 if (value > max_brightness)
 689                         return AE_BAD_PARAMETER;
 690                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 691                 break;
 692         case ACER_CAP_WIRELESS:
 693                 if (value > 1)
 694                         return AE_BAD_PARAMETER;
 695                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 696                 break;
 697         case ACER_CAP_BLUETOOTH:
 698                 if (value > 1)
 699                         return AE_BAD_PARAMETER;
 700                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 701                 break;
 702         case ACER_CAP_THREEG:
 703                 if (value > 1)
 704                         return AE_BAD_PARAMETER;
 705                 method_id = ACER_WMID_SET_THREEG_METHODID;
 706                 break;
 707         case ACER_CAP_MAILLED:
 708                 if (value > 1)
 709                         return AE_BAD_PARAMETER;
 710                 if (quirks->mailled == 1) {
 711                         param = value ? 0x92 : 0x93;
 712                         i8042_command(&param, 0x1059);
 713                         return 0;
 714                 }
 715                 break;
 716         default:
 717                 return AE_BAD_ADDRESS;
 718         }
 719         return WMI_execute_u32(method_id, (u32)value, NULL);
 720 }
 721
 722 static acpi_status WMID_set_capabilities(void)
 723 {
 724         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 725         union acpi_object *obj;
 726         acpi_status status;
 727         u32 devices;
 728
 729         status = wmi_query_block(WMID_GUID2, 1, &out);
 730         if (ACPI_FAILURE(status))
 731                 return status;
 732
 733         obj = (union acpi_object *) out.pointer;
 734         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 735                 obj->buffer.length == sizeof(u32)) {
 736                 devices = *((u32 *) obj->buffer.pointer);
 737         } else {
 738                 return AE_ERROR;
 739         }
 740
 741         /* Not sure on the meaning of the relevant bits yet to detect these */
 742         interface->capability |= ACER_CAP_WIRELESS;
 743         interface->capability |= ACER_CAP_THREEG;
 744
 745         /* WMID always provides brightness methods */
 746         interface->capability |= ACER_CAP_BRIGHTNESS;
 747
 748         if (devices & 0x10)
 749                 interface->capability |= ACER_CAP_BLUETOOTH;
 750
 751         if (!(devices & 0x20))
 752                 max_brightness = 0x9;
 753
 754         return status;
 755 }
 756
 757 static struct wmi_interface wmid_interface = {
 758         .type = ACER_WMID,
 759 };
 760
 761 /*
 762  * Generic Device (interface-independent)
 763  */
 764
 765 static acpi_status get_u32(u32 *value, u32 cap)
 766 {
 767         acpi_status status = AE_BAD_ADDRESS;
 768
 769         switch (interface->type) {
 770         case ACER_AMW0:
 771                 status = AMW0_get_u32(value, cap, interface);
 772                 break;
 773         case ACER_AMW0_V2:
 774                 if (cap == ACER_CAP_MAILLED) {
 775                         status = AMW0_get_u32(value, cap, interface);
 776                         break;
 777                 }
 778         case ACER_WMID:
 779                 status = WMID_get_u32(value, cap, interface);
 780                 break;
 781         }
 782
 783         return status;
 784 }
 785
 786 static acpi_status set_u32(u32 value, u32 cap)
 787 {
 788         if (interface->capability & cap) {
 789                 switch (interface->type) {
 790                 case ACER_AMW0:
 791                         return AMW0_set_u32(value, cap, interface);
 792                 case ACER_AMW0_V2:
 793                 case ACER_WMID:
 794                         return WMID_set_u32(value, cap, interface);
 795                 default:
 796                         return AE_BAD_PARAMETER;
 797                 }
 798         }
 799         return AE_BAD_PARAMETER;
 800 }
 801
 802 static void __init acer_commandline_init(void)
 803 {
 804         /*
 805          * These will all fail silently if the value given is invalid, or the
 806          * capability isn't available on the given interface
 807          */
 808         set_u32(mailled, ACER_CAP_MAILLED);
 809         set_u32(wireless, ACER_CAP_WIRELESS);
 810         set_u32(bluetooth, ACER_CAP_BLUETOOTH);
 811         set_u32(threeg, ACER_CAP_THREEG);
 812         set_u32(brightness, ACER_CAP_BRIGHTNESS);
 813 }
 814
 815 /*
 816  * LED device (Mail LED only, no other LEDs known yet)
 817  */
 818 static void mail_led_set(struct led_classdev *led_cdev,
 819 enum led_brightness value)
 820 {
 821         set_u32(value, ACER_CAP_MAILLED);
 822 }
 823
 824 static struct led_classdev mail_led = {
 825         .name = "acer-wmi::mail",
 826         .brightness_set = mail_led_set,
 827 };
 828
 829 static int __devinit acer_led_init(struct device *dev)
 830 {
 831         return led_classdev_register(dev, &mail_led);
 832 }
 833
 834 static void acer_led_exit(void)
 835 {
 836         led_classdev_unregister(&mail_led);
 837 }
 838
 839 /*
 840  * Backlight device
 841  */
 842 static struct backlight_device *acer_backlight_device;
 843
 844 static int read_brightness(struct backlight_device *bd)
 845 {
 846         u32 value;
 847         get_u32(&value, ACER_CAP_BRIGHTNESS);
 848         return value;
 849 }
 850
 851 static int update_bl_status(struct backlight_device *bd)
 852 {
 853         int intensity = bd->props.brightness;
 854
 855         if (bd->props.power != FB_BLANK_UNBLANK)
 856                 intensity = 0;
 857         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
 858                 intensity = 0;
 859
 860         set_u32(intensity, ACER_CAP_BRIGHTNESS);
 861
 862         return 0;
 863 }
 864
 865 static struct backlight_ops acer_bl_ops = {
 866         .get_brightness = read_brightness,
 867         .update_status = update_bl_status,
 868 };
 869
 870 static int __devinit acer_backlight_init(struct device *dev)
 871 {
 872         struct backlight_device *bd;
 873
 874         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
 875         if (IS_ERR(bd)) {
 876                 printk(ACER_ERR "Could not register Acer backlight device\n");
 877                 acer_backlight_device = NULL;
 878                 return PTR_ERR(bd);
 879         }
 880
 881         acer_backlight_device = bd;
 882
 883         bd->props.power = FB_BLANK_UNBLANK;
 884         bd->props.brightness = max_brightness;
 885         bd->props.max_brightness = max_brightness;
 886         backlight_update_status(bd);
 887         return 0;
 888 }
 889
 890 static void acer_backlight_exit(void)
 891 {
 892         backlight_device_unregister(acer_backlight_device);
 893 }
 894
 895 /*
 896  * Read/ write bool sysfs macro
 897  */
 898 #define show_set_bool(value, cap) \
 899 static ssize_t \
 900 show_bool_##value(struct device *dev, struct device_attribute *attr, \
 901         char *buf) \
 902 { \
 903         u32 result; \
 904         acpi_status status = get_u32(&result, cap); \
 905         if (ACPI_SUCCESS(status)) \
 906                 return sprintf(buf, "%u\n", result); \
 907         return sprintf(buf, "Read error\n"); \
 908 } \
 909 \
 910 static ssize_t \
 911 set_bool_##value(struct device *dev, struct device_attribute *attr, \
 912         const char *buf, size_t count) \
 913 { \
 914         u32 tmp = simple_strtoul(buf, NULL, 10); \
 915         acpi_status status = set_u32(tmp, cap); \
 916                 if (ACPI_FAILURE(status)) \
 917                         return -EINVAL; \
 918         return count; \
 919 } \
 920 static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
 921         show_bool_##value, set_bool_##value);
 922
 923 show_set_bool(wireless, ACER_CAP_WIRELESS);
 924 show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
 925 show_set_bool(threeg, ACER_CAP_THREEG);
 926
 927 /*
 928  * Read interface sysfs macro
 929  */
 930 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
 931         char *buf)
 932 {
 933         switch (interface->type) {
 934         case ACER_AMW0:
 935                 return sprintf(buf, "AMW0\n");
 936         case ACER_AMW0_V2:
 937                 return sprintf(buf, "AMW0 v2\n");
 938         case ACER_WMID:
 939                 return sprintf(buf, "WMID\n");
 940         default:
 941                 return sprintf(buf, "Error!\n");
 942         }
 943 }
 944
 945 static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
 946         show_interface, NULL);
 947
 948 /*
 949  * Platform device
 950  */
 951 static int __devinit acer_platform_probe(struct platform_device *device)
 952 {
 953         int err;
 954
 955         if (has_cap(ACER_CAP_MAILLED)) {
 956                 err = acer_led_init(&device->dev);
 957                 if (err)
 958                         goto error_mailled;
 959         }
 960
 961         if (has_cap(ACER_CAP_BRIGHTNESS)) {
 962                 err = acer_backlight_init(&device->dev);
 963                 if (err)
 964                         goto error_brightness;
 965         }
 966
 967         return 0;
 968
 969 error_brightness:
 970         acer_led_exit();
 971 error_mailled:
 972         return err;
 973 }
 974
 975 static int acer_platform_remove(struct platform_device *device)
 976 {
 977         if (has_cap(ACER_CAP_MAILLED))
 978                 acer_led_exit();
 979         if (has_cap(ACER_CAP_BRIGHTNESS))
 980                 acer_backlight_exit();
 981         return 0;
 982 }
 983
 984 static int acer_platform_suspend(struct platform_device *dev,
 985 pm_message_t state)
 986 {
 987         u32 value;
 988         struct acer_data *data = &interface->data;
 989
 990         if (!data)
 991                 return -ENOMEM;
 992
 993         if (has_cap(ACER_CAP_WIRELESS)) {
 994                 get_u32(&value, ACER_CAP_WIRELESS);
 995                 data->wireless = value;
 996         }
 997
 998         if (has_cap(ACER_CAP_BLUETOOTH)) {
 999                 get_u32(&value, ACER_CAP_BLUETOOTH);
1000                 data->bluetooth = value;
1001         }
1002
1003         if (has_cap(ACER_CAP_MAILLED)) {
1004                 get_u32(&value, ACER_CAP_MAILLED);
1005                 data->mailled = value;
1006         }
1007
1008         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1009                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1010                 data->brightness = value;
1011         }
1012
1013         return 0;
1014 }
1015
1016 static int acer_platform_resume(struct platform_device *device)
1017 {
1018         struct acer_data *data = &interface->data;
1019
1020         if (!data)
1021                 return -ENOMEM;
1022
1023         if (has_cap(ACER_CAP_WIRELESS))
1024                 set_u32(data->wireless, ACER_CAP_WIRELESS);
1025
1026         if (has_cap(ACER_CAP_BLUETOOTH))
1027                 set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
1028
1029         if (has_cap(ACER_CAP_THREEG))
1030                 set_u32(data->threeg, ACER_CAP_THREEG);
1031
1032         if (has_cap(ACER_CAP_MAILLED))
1033                 set_u32(data->mailled, ACER_CAP_MAILLED);
1034
1035         if (has_cap(ACER_CAP_BRIGHTNESS))
1036                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1037
1038         return 0;
1039 }
1040
1041 static struct platform_driver acer_platform_driver = {
1042         .driver = {
1043                 .name = "acer-wmi",
1044                 .owner = THIS_MODULE,
1045         },
1046         .probe = acer_platform_probe,
1047         .remove = acer_platform_remove,
1048         .suspend = acer_platform_suspend,
1049         .resume = acer_platform_resume,
1050 };
1051
1052 static struct platform_device *acer_platform_device;
1053
1054 static int remove_sysfs(struct platform_device *device)
1055 {
1056         if (has_cap(ACER_CAP_WIRELESS))
1057                 device_remove_file(&device->dev, &dev_attr_wireless);
1058
1059         if (has_cap(ACER_CAP_BLUETOOTH))
1060                 device_remove_file(&device->dev, &dev_attr_bluetooth);
1061
1062         if (has_cap(ACER_CAP_THREEG))
1063                 device_remove_file(&device->dev, &dev_attr_threeg);
1064
1065         device_remove_file(&device->dev, &dev_attr_interface);
1066
1067         return 0;
1068 }
1069
1070 static int create_sysfs(void)
1071 {
1072         int retval = -ENOMEM;
1073
1074         if (has_cap(ACER_CAP_WIRELESS)) {
1075                 retval = device_create_file(&acer_platform_device->dev,
1076                         &dev_attr_wireless);
1077                 if (retval)
1078                         goto error_sysfs;
1079         }
1080
1081         if (has_cap(ACER_CAP_BLUETOOTH)) {
1082                 retval = device_create_file(&acer_platform_device->dev,
1083                         &dev_attr_bluetooth);
1084                 if (retval)
1085                         goto error_sysfs;
1086         }
1087
1088         if (has_cap(ACER_CAP_THREEG)) {
1089                 retval = device_create_file(&acer_platform_device->dev,
1090                         &dev_attr_threeg);
1091                 if (retval)
1092                         goto error_sysfs;
1093         }
1094
1095         retval = device_create_file(&acer_platform_device->dev,
1096                 &dev_attr_interface);
1097         if (retval)
1098                 goto error_sysfs;
1099
1100         return 0;
1101
1102 error_sysfs:
1103                 remove_sysfs(acer_platform_device);
1104         return retval;
1105 }
1106
1107 static int __init acer_wmi_init(void)
1108 {
1109         int err;
1110
1111         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
1112                         ACER_WMI_VERSION);
1113
1114         find_quirks();
1115
1116         /*
1117          * Detect which ACPI-WMI interface we're using.
1118          */
1119         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1120                 interface = &AMW0_V2_interface;
1121
1122         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1123                 interface = &wmid_interface;
1124
1125         if (wmi_has_guid(WMID_GUID2) && interface) {
1126                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1127                         printk(ACER_ERR "Unable to detect available WMID "
1128                                         "devices\n");
1129                         return -ENODEV;
1130                 }
1131         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1132                 printk(ACER_ERR "No WMID device detection method found\n");
1133                 return -ENODEV;
1134         }
1135
1136         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1137                 interface = &AMW0_interface;
1138
1139                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1140                         printk(ACER_ERR "Unable to detect available AMW0 "
1141                                         "devices\n");
1142                         return -ENODEV;
1143                 }
1144         }
1145
1146         if (wmi_has_guid(AMW0_GUID1))
1147                 AMW0_find_mailled();
1148
1149         if (!interface) {
1150                 printk(ACER_ERR "No or unsupported WMI interface, unable to "
1151                                 "load\n");
1152                 return -ENODEV;
1153         }
1154
1155         if (platform_driver_register(&acer_platform_driver)) {
1156                 printk(ACER_ERR "Unable to register platform driver.\n");
1157                 goto error_platform_register;
1158         }
1159         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1160         platform_device_add(acer_platform_device);
1161
1162         err = create_sysfs();
1163         if (err)
1164                 return err;
1165
1166         /* Override any initial settings with values from the commandline */
1167         acer_commandline_init();
1168
1169         return 0;
1170
1171 error_platform_register:
1172         return -ENODEV;
1173 }
1174
1175 static void __exit acer_wmi_exit(void)
1176 {
1177         remove_sysfs(acer_platform_device);
1178         platform_device_del(acer_platform_device);
1179         platform_driver_unregister(&acer_platform_driver);
1180
1181         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1182         return;
1183 }
1184
1185 module_init(acer_wmi_init);
1186 module_exit(acer_wmi_exit);