drivers/platform/x86/alienware-wmi.c

   1 /*
   2  * Alienware AlienFX control
   3  *
   4  * Copyright (C) 2014 Dell Inc <mario_limonciello@dell.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  */
  17
  18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  19
  20 #include <linux/acpi.h>
  21 #include <linux/module.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/dmi.h>
  24 #include <linux/leds.h>
  25
  26 #define LEGACY_CONTROL_GUID             "A90597CE-A997-11DA-B012-B622A1EF5492"
  27 #define LEGACY_POWER_CONTROL_GUID       "A80593CE-A997-11DA-B012-B622A1EF5492"
  28 #define WMAX_CONTROL_GUID               "A70591CE-A997-11DA-B012-B622A1EF5492"
  29
  30 #define WMAX_METHOD_HDMI_SOURCE         0x1
  31 #define WMAX_METHOD_HDMI_STATUS         0x2
  32 #define WMAX_METHOD_BRIGHTNESS          0x3
  33 #define WMAX_METHOD_ZONE_CONTROL        0x4
  34 #define WMAX_METHOD_HDMI_CABLE          0x5
  35 #define WMAX_METHOD_AMPLIFIER_CABLE     0x6
  36 #define WMAX_METHOD_DEEP_SLEEP_CONTROL  0x0B
  37 #define WMAX_METHOD_DEEP_SLEEP_STATUS   0x0C
  38
  39 MODULE_AUTHOR("Mario Limonciello <mario_limonciello@dell.com>");
  40 MODULE_DESCRIPTION("Alienware special feature control");
  41 MODULE_LICENSE("GPL");
  42 MODULE_ALIAS("wmi:" LEGACY_CONTROL_GUID);
  43 MODULE_ALIAS("wmi:" WMAX_CONTROL_GUID);
  44
  45 enum INTERFACE_FLAGS {
  46         LEGACY,
  47         WMAX,
  48 };
  49
  50 enum LEGACY_CONTROL_STATES {
  51         LEGACY_RUNNING = 1,
  52         LEGACY_BOOTING = 0,
  53         LEGACY_SUSPEND = 3,
  54 };
  55
  56 enum WMAX_CONTROL_STATES {
  57         WMAX_RUNNING = 0xFF,
  58         WMAX_BOOTING = 0,
  59         WMAX_SUSPEND = 3,
  60 };
  61
  62 struct quirk_entry {
  63         u8 num_zones;
  64         u8 hdmi_mux;
  65         u8 amplifier;
  66         u8 deepslp;
  67 };
  68
  69 static struct quirk_entry *quirks;
  70
  71 static struct quirk_entry quirk_unknown = {
  72         .num_zones = 2,
  73         .hdmi_mux = 0,
  74         .amplifier = 0,
  75         .deepslp = 0,
  76 };
  77
  78 static struct quirk_entry quirk_x51_r1_r2 = {
  79         .num_zones = 3,
  80         .hdmi_mux = 0,
  81         .amplifier = 0,
  82         .deepslp = 0,
  83 };
  84
  85 static struct quirk_entry quirk_x51_r3 = {
  86         .num_zones = 4,
  87         .hdmi_mux = 0,
  88         .amplifier = 1,
  89         .deepslp = 0,
  90 };
  91
  92 static struct quirk_entry quirk_asm100 = {
  93         .num_zones = 2,
  94         .hdmi_mux = 1,
  95         .amplifier = 0,
  96         .deepslp = 0,
  97 };
  98
  99 static struct quirk_entry quirk_asm200 = {
 100         .num_zones = 2,
 101         .hdmi_mux = 1,
 102         .amplifier = 0,
 103         .deepslp = 1,
 104 };
 105
 106 static struct quirk_entry quirk_asm201 = {
 107         .num_zones = 2,
 108         .hdmi_mux = 1,
 109         .amplifier = 1,
 110         .deepslp = 1,
 111 };
 112
 113 static int __init dmi_matched(const struct dmi_system_id *dmi)
 114 {
 115         quirks = dmi->driver_data;
 116         return 1;
 117 }
 118
 119 static const struct dmi_system_id alienware_quirks[] __initconst = {
 120         {
 121          .callback = dmi_matched,
 122          .ident = "Alienware X51 R3",
 123          .matches = {
 124                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 125                      DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R3"),
 126                      },
 127          .driver_data = &quirk_x51_r3,
 128          },
 129         {
 130          .callback = dmi_matched,
 131          .ident = "Alienware X51 R2",
 132          .matches = {
 133                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 134                      DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R2"),
 135                      },
 136          .driver_data = &quirk_x51_r1_r2,
 137          },
 138         {
 139          .callback = dmi_matched,
 140          .ident = "Alienware X51 R1",
 141          .matches = {
 142                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 143                      DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51"),
 144                      },
 145          .driver_data = &quirk_x51_r1_r2,
 146          },
 147         {
 148          .callback = dmi_matched,
 149          .ident = "Alienware ASM100",
 150          .matches = {
 151                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 152                      DMI_MATCH(DMI_PRODUCT_NAME, "ASM100"),
 153                      },
 154          .driver_data = &quirk_asm100,
 155          },
 156         {
 157          .callback = dmi_matched,
 158          .ident = "Alienware ASM200",
 159          .matches = {
 160                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 161                      DMI_MATCH(DMI_PRODUCT_NAME, "ASM200"),
 162                      },
 163          .driver_data = &quirk_asm200,
 164          },
 165         {
 166          .callback = dmi_matched,
 167          .ident = "Alienware ASM201",
 168          .matches = {
 169                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 170                      DMI_MATCH(DMI_PRODUCT_NAME, "ASM201"),
 171                      },
 172          .driver_data = &quirk_asm201,
 173          },
 174         {}
 175 };
 176
 177 struct color_platform {
 178         u8 blue;
 179         u8 green;
 180         u8 red;
 181 } __packed;
 182
 183 struct platform_zone {
 184         u8 location;
 185         struct device_attribute *attr;
 186         struct color_platform colors;
 187 };
 188
 189 struct wmax_brightness_args {
 190         u32 led_mask;
 191         u32 percentage;
 192 };
 193
 194 struct wmax_basic_args {
 195         u8 arg;
 196 };
 197
 198 struct legacy_led_args {
 199         struct color_platform colors;
 200         u8 brightness;
 201         u8 state;
 202 } __packed;
 203
 204 struct wmax_led_args {
 205         u32 led_mask;
 206         struct color_platform colors;
 207         u8 state;
 208 } __packed;
 209
 210 static struct platform_device *platform_device;
 211 static struct device_attribute *zone_dev_attrs;
 212 static struct attribute **zone_attrs;
 213 static struct platform_zone *zone_data;
 214
 215 static struct platform_driver platform_driver = {
 216         .driver = {
 217                    .name = "alienware-wmi",
 218                    }
 219 };
 220
 221 static struct attribute_group zone_attribute_group = {
 222         .name = "rgb_zones",
 223 };
 224
 225 static u8 interface;
 226 static u8 lighting_control_state;
 227 static u8 global_brightness;
 228
 229 /*
 230  * Helpers used for zone control
 231  */
 232 static int parse_rgb(const char *buf, struct platform_zone *zone)
 233 {
 234         long unsigned int rgb;
 235         int ret;
 236         union color_union {
 237                 struct color_platform cp;
 238                 int package;
 239         } repackager;
 240
 241         ret = kstrtoul(buf, 16, &rgb);
 242         if (ret)
 243                 return ret;
 244
 245         /* RGB triplet notation is 24-bit hexadecimal */
 246         if (rgb > 0xFFFFFF)
 247                 return -EINVAL;
 248
 249         repackager.package = rgb & 0x0f0f0f0f;
 250         pr_debug("alienware-wmi: r: %d g:%d b: %d\n",
 251                  repackager.cp.red, repackager.cp.green, repackager.cp.blue);
 252         zone->colors = repackager.cp;
 253         return 0;
 254 }
 255
 256 static struct platform_zone *match_zone(struct device_attribute *attr)
 257 {
 258         u8 zone;
 259
 260         for (zone = 0; zone < quirks->num_zones; zone++) {
 261                 if ((struct device_attribute *)zone_data[zone].attr == attr) {
 262                         pr_debug("alienware-wmi: matched zone location: %d\n",
 263                                  zone_data[zone].location);
 264                         return &zone_data[zone];
 265                 }
 266         }
 267         return NULL;
 268 }
 269
 270 /*
 271  * Individual RGB zone control
 272  */
 273 static int alienware_update_led(struct platform_zone *zone)
 274 {
 275         int method_id;
 276         acpi_status status;
 277         char *guid;
 278         struct acpi_buffer input;
 279         struct legacy_led_args legacy_args;
 280         struct wmax_led_args wmax_basic_args;
 281         if (interface == WMAX) {
 282                 wmax_basic_args.led_mask = 1 << zone->location;
 283                 wmax_basic_args.colors = zone->colors;
 284                 wmax_basic_args.state = lighting_control_state;
 285                 guid = WMAX_CONTROL_GUID;
 286                 method_id = WMAX_METHOD_ZONE_CONTROL;
 287
 288                 input.length = (acpi_size) sizeof(wmax_basic_args);
 289                 input.pointer = &wmax_basic_args;
 290         } else {
 291                 legacy_args.colors = zone->colors;
 292                 legacy_args.brightness = global_brightness;
 293                 legacy_args.state = 0;
 294                 if (lighting_control_state == LEGACY_BOOTING ||
 295                     lighting_control_state == LEGACY_SUSPEND) {
 296                         guid = LEGACY_POWER_CONTROL_GUID;
 297                         legacy_args.state = lighting_control_state;
 298                 } else
 299                         guid = LEGACY_CONTROL_GUID;
 300                 method_id = zone->location + 1;
 301
 302                 input.length = (acpi_size) sizeof(legacy_args);
 303                 input.pointer = &legacy_args;
 304         }
 305         pr_debug("alienware-wmi: guid %s method %d\n", guid, method_id);
 306
 307         status = wmi_evaluate_method(guid, 0, method_id, &input, NULL);
 308         if (ACPI_FAILURE(status))
 309                 pr_err("alienware-wmi: zone set failure: %u\n", status);
 310         return ACPI_FAILURE(status);
 311 }
 312
 313 static ssize_t zone_show(struct device *dev, struct device_attribute *attr,
 314                          char *buf)
 315 {
 316         struct platform_zone *target_zone;
 317         target_zone = match_zone(attr);
 318         if (target_zone == NULL)
 319                 return sprintf(buf, "red: -1, green: -1, blue: -1\n");
 320         return sprintf(buf, "red: %d, green: %d, blue: %d\n",
 321                        target_zone->colors.red,
 322                        target_zone->colors.green, target_zone->colors.blue);
 323
 324 }
 325
 326 static ssize_t zone_set(struct device *dev, struct device_attribute *attr,
 327                         const char *buf, size_t count)
 328 {
 329         struct platform_zone *target_zone;
 330         int ret;
 331         target_zone = match_zone(attr);
 332         if (target_zone == NULL) {
 333                 pr_err("alienware-wmi: invalid target zone\n");
 334                 return 1;
 335         }
 336         ret = parse_rgb(buf, target_zone);
 337         if (ret)
 338                 return ret;
 339         ret = alienware_update_led(target_zone);
 340         return ret ? ret : count;
 341 }
 342
 343 /*
 344  * LED Brightness (Global)
 345  */
 346 static int wmax_brightness(int brightness)
 347 {
 348         acpi_status status;
 349         struct acpi_buffer input;
 350         struct wmax_brightness_args args = {
 351                 .led_mask = 0xFF,
 352                 .percentage = brightness,
 353         };
 354         input.length = (acpi_size) sizeof(args);
 355         input.pointer = &args;
 356         status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
 357                                      WMAX_METHOD_BRIGHTNESS, &input, NULL);
 358         if (ACPI_FAILURE(status))
 359                 pr_err("alienware-wmi: brightness set failure: %u\n", status);
 360         return ACPI_FAILURE(status);
 361 }
 362
 363 static void global_led_set(struct led_classdev *led_cdev,
 364                            enum led_brightness brightness)
 365 {
 366         int ret;
 367         global_brightness = brightness;
 368         if (interface == WMAX)
 369                 ret = wmax_brightness(brightness);
 370         else
 371                 ret = alienware_update_led(&zone_data[0]);
 372         if (ret)
 373                 pr_err("LED brightness update failed\n");
 374 }
 375
 376 static enum led_brightness global_led_get(struct led_classdev *led_cdev)
 377 {
 378         return global_brightness;
 379 }
 380
 381 static struct led_classdev global_led = {
 382         .brightness_set = global_led_set,
 383         .brightness_get = global_led_get,
 384         .name = "alienware::global_brightness",
 385 };
 386
 387 /*
 388  * Lighting control state device attribute (Global)
 389  */
 390 static ssize_t show_control_state(struct device *dev,
 391                                   struct device_attribute *attr, char *buf)
 392 {
 393         if (lighting_control_state == LEGACY_BOOTING)
 394                 return scnprintf(buf, PAGE_SIZE, "[booting] running suspend\n");
 395         else if (lighting_control_state == LEGACY_SUSPEND)
 396                 return scnprintf(buf, PAGE_SIZE, "booting running [suspend]\n");
 397         return scnprintf(buf, PAGE_SIZE, "booting [running] suspend\n");
 398 }
 399
 400 static ssize_t store_control_state(struct device *dev,
 401                                    struct device_attribute *attr,
 402                                    const char *buf, size_t count)
 403 {
 404         long unsigned int val;
 405         if (strcmp(buf, "booting\n") == 0)
 406                 val = LEGACY_BOOTING;
 407         else if (strcmp(buf, "suspend\n") == 0)
 408                 val = LEGACY_SUSPEND;
 409         else if (interface == LEGACY)
 410                 val = LEGACY_RUNNING;
 411         else
 412                 val = WMAX_RUNNING;
 413         lighting_control_state = val;
 414         pr_debug("alienware-wmi: updated control state to %d\n",
 415                  lighting_control_state);
 416         return count;
 417 }
 418
 419 static DEVICE_ATTR(lighting_control_state, 0644, show_control_state,
 420                    store_control_state);
 421
 422 static int alienware_zone_init(struct platform_device *dev)
 423 {
 424         u8 zone;
 425         char buffer[10];
 426         char *name;
 427
 428         if (interface == WMAX) {
 429                 lighting_control_state = WMAX_RUNNING;
 430         } else if (interface == LEGACY) {
 431                 lighting_control_state = LEGACY_RUNNING;
 432         }
 433         global_led.max_brightness = 0x0F;
 434         global_brightness = global_led.max_brightness;
 435
 436         /*
 437          *      - zone_dev_attrs num_zones + 1 is for individual zones and then
 438          *        null terminated
 439          *      - zone_attrs num_zones + 2 is for all attrs in zone_dev_attrs +
 440          *        the lighting control + null terminated
 441          *      - zone_data num_zones is for the distinct zones
 442          */
 443         zone_dev_attrs =
 444             kzalloc(sizeof(struct device_attribute) * (quirks->num_zones + 1),
 445                     GFP_KERNEL);
 446         if (!zone_dev_attrs)
 447                 return -ENOMEM;
 448
 449         zone_attrs =
 450             kzalloc(sizeof(struct attribute *) * (quirks->num_zones + 2),
 451                     GFP_KERNEL);
 452         if (!zone_attrs)
 453                 return -ENOMEM;
 454
 455         zone_data =
 456             kzalloc(sizeof(struct platform_zone) * (quirks->num_zones),
 457                     GFP_KERNEL);
 458         if (!zone_data)
 459                 return -ENOMEM;
 460
 461         for (zone = 0; zone < quirks->num_zones; zone++) {
 462                 sprintf(buffer, "zone%02hhX", zone);
 463                 name = kstrdup(buffer, GFP_KERNEL);
 464                 if (name == NULL)
 465                         return 1;
 466                 sysfs_attr_init(&zone_dev_attrs[zone].attr);
 467                 zone_dev_attrs[zone].attr.name = name;
 468                 zone_dev_attrs[zone].attr.mode = 0644;
 469                 zone_dev_attrs[zone].show = zone_show;
 470                 zone_dev_attrs[zone].store = zone_set;
 471                 zone_data[zone].location = zone;
 472                 zone_attrs[zone] = &zone_dev_attrs[zone].attr;
 473                 zone_data[zone].attr = &zone_dev_attrs[zone];
 474         }
 475         zone_attrs[quirks->num_zones] = &dev_attr_lighting_control_state.attr;
 476         zone_attribute_group.attrs = zone_attrs;
 477
 478         led_classdev_register(&dev->dev, &global_led);
 479
 480         return sysfs_create_group(&dev->dev.kobj, &zone_attribute_group);
 481 }
 482
 483 static void alienware_zone_exit(struct platform_device *dev)
 484 {
 485         u8 zone;
 486
 487         sysfs_remove_group(&dev->dev.kobj, &zone_attribute_group);
 488         led_classdev_unregister(&global_led);
 489         if (zone_dev_attrs) {
 490                 for (zone = 0; zone < quirks->num_zones; zone++)
 491                         kfree(zone_dev_attrs[zone].attr.name);
 492         }
 493         kfree(zone_dev_attrs);
 494         kfree(zone_data);
 495         kfree(zone_attrs);
 496 }
 497
 498 static acpi_status alienware_wmax_command(struct wmax_basic_args *in_args,
 499                                           u32 command, int *out_data)
 500 {
 501         acpi_status status;
 502         union acpi_object *obj;
 503         struct acpi_buffer input;
 504         struct acpi_buffer output;
 505
 506         input.length = (acpi_size) sizeof(*in_args);
 507         input.pointer = in_args;
 508         if (out_data != NULL) {
 509                 output.length = ACPI_ALLOCATE_BUFFER;
 510                 output.pointer = NULL;
 511                 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
 512                                              command, &input, &output);
 513         } else
 514                 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
 515                                              command, &input, NULL);
 516
 517         if (ACPI_SUCCESS(status) && out_data != NULL) {
 518                 obj = (union acpi_object *)output.pointer;
 519                 if (obj && obj->type == ACPI_TYPE_INTEGER)
 520                         *out_data = (u32) obj->integer.value;
 521         }
 522         return status;
 523
 524 }
 525
 526 /*
 527  *      The HDMI mux sysfs node indicates the status of the HDMI input mux.
 528  *      It can toggle between standard system GPU output and HDMI input.
 529  */
 530 static ssize_t show_hdmi_cable(struct device *dev,
 531                                struct device_attribute *attr, char *buf)
 532 {
 533         acpi_status status;
 534         u32 out_data;
 535         struct wmax_basic_args in_args = {
 536                 .arg = 0,
 537         };
 538         status =
 539             alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_CABLE,
 540                                    (u32 *) &out_data);
 541         if (ACPI_SUCCESS(status)) {
 542                 if (out_data == 0)
 543                         return scnprintf(buf, PAGE_SIZE,
 544                                          "[unconnected] connected unknown\n");
 545                 else if (out_data == 1)
 546                         return scnprintf(buf, PAGE_SIZE,
 547                                          "unconnected [connected] unknown\n");
 548         }
 549         pr_err("alienware-wmi: unknown HDMI cable status: %d\n", status);
 550         return scnprintf(buf, PAGE_SIZE, "unconnected connected [unknown]\n");
 551 }
 552
 553 static ssize_t show_hdmi_source(struct device *dev,
 554                                 struct device_attribute *attr, char *buf)
 555 {
 556         acpi_status status;
 557         u32 out_data;
 558         struct wmax_basic_args in_args = {
 559                 .arg = 0,
 560         };
 561         status =
 562             alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_STATUS,
 563                                    (u32 *) &out_data);
 564
 565         if (ACPI_SUCCESS(status)) {
 566                 if (out_data == 1)
 567                         return scnprintf(buf, PAGE_SIZE,
 568                                          "[input] gpu unknown\n");
 569                 else if (out_data == 2)
 570                         return scnprintf(buf, PAGE_SIZE,
 571                                          "input [gpu] unknown\n");
 572         }
 573         pr_err("alienware-wmi: unknown HDMI source status: %d\n", out_data);
 574         return scnprintf(buf, PAGE_SIZE, "input gpu [unknown]\n");
 575 }
 576
 577 static ssize_t toggle_hdmi_source(struct device *dev,
 578                                   struct device_attribute *attr,
 579                                   const char *buf, size_t count)
 580 {
 581         acpi_status status;
 582         struct wmax_basic_args args;
 583         if (strcmp(buf, "gpu\n") == 0)
 584                 args.arg = 1;
 585         else if (strcmp(buf, "input\n") == 0)
 586                 args.arg = 2;
 587         else
 588                 args.arg = 3;
 589         pr_debug("alienware-wmi: setting hdmi to %d : %s", args.arg, buf);
 590
 591         status = alienware_wmax_command(&args, WMAX_METHOD_HDMI_SOURCE, NULL);
 592
 593         if (ACPI_FAILURE(status))
 594                 pr_err("alienware-wmi: HDMI toggle failed: results: %u\n",
 595                        status);
 596         return count;
 597 }
 598
 599 static DEVICE_ATTR(cable, S_IRUGO, show_hdmi_cable, NULL);
 600 static DEVICE_ATTR(source, S_IRUGO | S_IWUSR, show_hdmi_source,
 601                    toggle_hdmi_source);
 602
 603 static struct attribute *hdmi_attrs[] = {
 604         &dev_attr_cable.attr,
 605         &dev_attr_source.attr,
 606         NULL,
 607 };
 608
 609 static const struct attribute_group hdmi_attribute_group = {
 610         .name = "hdmi",
 611         .attrs = hdmi_attrs,
 612 };
 613
 614 static void remove_hdmi(struct platform_device *dev)
 615 {
 616         if (quirks->hdmi_mux > 0)
 617                 sysfs_remove_group(&dev->dev.kobj, &hdmi_attribute_group);
 618 }
 619
 620 static int create_hdmi(struct platform_device *dev)
 621 {
 622         int ret;
 623
 624         ret = sysfs_create_group(&dev->dev.kobj, &hdmi_attribute_group);
 625         if (ret)
 626                 remove_hdmi(dev);
 627         return ret;
 628 }
 629
 630 /*
 631  * Alienware GFX amplifier support
 632  * - Currently supports reading cable status
 633  * - Leaving expansion room to possibly support dock/undock events later
 634  */
 635 static ssize_t show_amplifier_status(struct device *dev,
 636                                      struct device_attribute *attr, char *buf)
 637 {
 638         acpi_status status;
 639         u32 out_data;
 640         struct wmax_basic_args in_args = {
 641                 .arg = 0,
 642         };
 643         status =
 644             alienware_wmax_command(&in_args, WMAX_METHOD_AMPLIFIER_CABLE,
 645                                    (u32 *) &out_data);
 646         if (ACPI_SUCCESS(status)) {
 647                 if (out_data == 0)
 648                         return scnprintf(buf, PAGE_SIZE,
 649                                          "[unconnected] connected unknown\n");
 650                 else if (out_data == 1)
 651                         return scnprintf(buf, PAGE_SIZE,
 652                                          "unconnected [connected] unknown\n");
 653         }
 654         pr_err("alienware-wmi: unknown amplifier cable status: %d\n", status);
 655         return scnprintf(buf, PAGE_SIZE, "unconnected connected [unknown]\n");
 656 }
 657
 658 static DEVICE_ATTR(status, S_IRUGO, show_amplifier_status, NULL);
 659
 660 static struct attribute *amplifier_attrs[] = {
 661         &dev_attr_status.attr,
 662         NULL,
 663 };
 664
 665 static const struct attribute_group amplifier_attribute_group = {
 666         .name = "amplifier",
 667         .attrs = amplifier_attrs,
 668 };
 669
 670 static void remove_amplifier(struct platform_device *dev)
 671 {
 672         if (quirks->amplifier > 0)
 673                 sysfs_remove_group(&dev->dev.kobj, &amplifier_attribute_group);
 674 }
 675
 676 static int create_amplifier(struct platform_device *dev)
 677 {
 678         int ret;
 679
 680         ret = sysfs_create_group(&dev->dev.kobj, &amplifier_attribute_group);
 681         if (ret)
 682                 remove_amplifier(dev);
 683         return ret;
 684 }
 685
 686 /*
 687  * Deep Sleep Control support
 688  * - Modifies BIOS setting for deep sleep control allowing extra wakeup events
 689  */
 690 static ssize_t show_deepsleep_status(struct device *dev,
 691                                      struct device_attribute *attr, char *buf)
 692 {
 693         acpi_status status;
 694         u32 out_data;
 695         struct wmax_basic_args in_args = {
 696                 .arg = 0,
 697         };
 698         status = alienware_wmax_command(&in_args, WMAX_METHOD_DEEP_SLEEP_STATUS,
 699                                         (u32 *) &out_data);
 700         if (ACPI_SUCCESS(status)) {
 701                 if (out_data == 0)
 702                         return scnprintf(buf, PAGE_SIZE,
 703                                          "[disabled] s5 s5_s4\n");
 704                 else if (out_data == 1)
 705                         return scnprintf(buf, PAGE_SIZE,
 706                                          "disabled [s5] s5_s4\n");
 707                 else if (out_data == 2)
 708                         return scnprintf(buf, PAGE_SIZE,
 709                                          "disabled s5 [s5_s4]\n");
 710         }
 711         pr_err("alienware-wmi: unknown deep sleep status: %d\n", status);
 712         return scnprintf(buf, PAGE_SIZE, "disabled s5 s5_s4 [unknown]\n");
 713 }
 714
 715 static ssize_t toggle_deepsleep(struct device *dev,
 716                                 struct device_attribute *attr,
 717                                 const char *buf, size_t count)
 718 {
 719         acpi_status status;
 720         struct wmax_basic_args args;
 721
 722         if (strcmp(buf, "disabled\n") == 0)
 723                 args.arg = 0;
 724         else if (strcmp(buf, "s5\n") == 0)
 725                 args.arg = 1;
 726         else
 727                 args.arg = 2;
 728         pr_debug("alienware-wmi: setting deep sleep to %d : %s", args.arg, buf);
 729
 730         status = alienware_wmax_command(&args, WMAX_METHOD_DEEP_SLEEP_CONTROL,
 731                                         NULL);
 732
 733         if (ACPI_FAILURE(status))
 734                 pr_err("alienware-wmi: deep sleep control failed: results: %u\n",
 735                         status);
 736         return count;
 737 }
 738
 739 static DEVICE_ATTR(deepsleep, S_IRUGO | S_IWUSR, show_deepsleep_status, toggle_deepsleep);
 740
 741 static struct attribute *deepsleep_attrs[] = {
 742         &dev_attr_deepsleep.attr,
 743         NULL,
 744 };
 745
 746 static const struct attribute_group deepsleep_attribute_group = {
 747         .name = "deepsleep",
 748         .attrs = deepsleep_attrs,
 749 };
 750
 751 static void remove_deepsleep(struct platform_device *dev)
 752 {
 753         if (quirks->deepslp > 0)
 754                 sysfs_remove_group(&dev->dev.kobj, &deepsleep_attribute_group);
 755 }
 756
 757 static int create_deepsleep(struct platform_device *dev)
 758 {
 759         int ret;
 760
 761         ret = sysfs_create_group(&dev->dev.kobj, &deepsleep_attribute_group);
 762         if (ret)
 763                 remove_deepsleep(dev);
 764         return ret;
 765 }
 766
 767 static int __init alienware_wmi_init(void)
 768 {
 769         int ret;
 770
 771         if (wmi_has_guid(LEGACY_CONTROL_GUID))
 772                 interface = LEGACY;
 773         else if (wmi_has_guid(WMAX_CONTROL_GUID))
 774                 interface = WMAX;
 775         else {
 776                 pr_warn("alienware-wmi: No known WMI GUID found\n");
 777                 return -ENODEV;
 778         }
 779
 780         dmi_check_system(alienware_quirks);
 781         if (quirks == NULL)
 782                 quirks = &quirk_unknown;
 783
 784         ret = platform_driver_register(&platform_driver);
 785         if (ret)
 786                 goto fail_platform_driver;
 787         platform_device = platform_device_alloc("alienware-wmi", -1);
 788         if (!platform_device) {
 789                 ret = -ENOMEM;
 790                 goto fail_platform_device1;
 791         }
 792         ret = platform_device_add(platform_device);
 793         if (ret)
 794                 goto fail_platform_device2;
 795
 796         if (quirks->hdmi_mux > 0) {
 797                 ret = create_hdmi(platform_device);
 798                 if (ret)
 799                         goto fail_prep_hdmi;
 800         }
 801
 802         if (quirks->amplifier > 0) {
 803                 ret = create_amplifier(platform_device);
 804                 if (ret)
 805                         goto fail_prep_amplifier;
 806         }
 807
 808         if (quirks->deepslp > 0) {
 809                 ret = create_deepsleep(platform_device);
 810                 if (ret)
 811                         goto fail_prep_deepsleep;
 812         }
 813
 814         ret = alienware_zone_init(platform_device);
 815         if (ret)
 816                 goto fail_prep_zones;
 817
 818         return 0;
 819
 820 fail_prep_zones:
 821         alienware_zone_exit(platform_device);
 822 fail_prep_deepsleep:
 823 fail_prep_amplifier:
 824 fail_prep_hdmi:
 825         platform_device_del(platform_device);
 826 fail_platform_device2:
 827         platform_device_put(platform_device);
 828 fail_platform_device1:
 829         platform_driver_unregister(&platform_driver);
 830 fail_platform_driver:
 831         return ret;
 832 }
 833
 834 module_init(alienware_wmi_init);
 835
 836 static void __exit alienware_wmi_exit(void)
 837 {
 838         if (platform_device) {
 839                 alienware_zone_exit(platform_device);
 840                 remove_hdmi(platform_device);
 841                 platform_device_unregister(platform_device);
 842                 platform_driver_unregister(&platform_driver);
 843         }
 844 }
 845
 846 module_exit(alienware_wmi_exit);