Pileus Git - ~andy/linux/blob - drivers/platform/x86/hp-wmi.c

   1 /*
   2  * HP WMI hotkeys
   3  *
   4  * Copyright (C) 2008 Red Hat <mjg@redhat.com>
   5  * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
   6  *
   7  * Portions based on wistron_btns.c:
   8  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
   9  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  10  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/types.h>
  34 #include <linux/input.h>
  35 #include <linux/input/sparse-keymap.h>
  36 #include <linux/platform_device.h>
  37 #include <linux/acpi.h>
  38 #include <linux/rfkill.h>
  39 #include <linux/string.h>
  40
  41 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
  42 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
  43 MODULE_LICENSE("GPL");
  44
  45 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
  46 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
  47
  48 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  49 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
  50
  51 #define HPWMI_DISPLAY_QUERY 0x1
  52 #define HPWMI_HDDTEMP_QUERY 0x2
  53 #define HPWMI_ALS_QUERY 0x3
  54 #define HPWMI_HARDWARE_QUERY 0x4
  55 #define HPWMI_WIRELESS_QUERY 0x5
  56 #define HPWMI_HOTKEY_QUERY 0xc
  57 #define HPWMI_WIRELESS2_QUERY 0x1b
  58
  59 enum hp_wmi_radio {
  60         HPWMI_WIFI = 0,
  61         HPWMI_BLUETOOTH = 1,
  62         HPWMI_WWAN = 2,
  63         HPWMI_GPS = 3,
  64 };
  65
  66 enum hp_wmi_event_ids {
  67         HPWMI_DOCK_EVENT = 1,
  68         HPWMI_PARK_HDD = 2,
  69         HPWMI_SMART_ADAPTER = 3,
  70         HPWMI_BEZEL_BUTTON = 4,
  71         HPWMI_WIRELESS = 5,
  72         HPWMI_CPU_BATTERY_THROTTLE = 6,
  73         HPWMI_LOCK_SWITCH = 7,
  74 };
  75
  76 struct bios_args {
  77         u32 signature;
  78         u32 command;
  79         u32 commandtype;
  80         u32 datasize;
  81         u32 data;
  82 };
  83
  84 struct bios_return {
  85         u32 sigpass;
  86         u32 return_code;
  87 };
  88
  89 enum hp_return_value {
  90         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
  91         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
  92         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
  93         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
  94 };
  95
  96 enum hp_wireless2_bits {
  97         HPWMI_POWER_STATE       = 0x01,
  98         HPWMI_POWER_SOFT        = 0x02,
  99         HPWMI_POWER_BIOS        = 0x04,
 100         HPWMI_POWER_HARD        = 0x08,
 101 };
 102
 103 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
 104                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
 105 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 106
 107 struct bios_rfkill2_device_state {
 108         u8 radio_type;
 109         u8 bus_type;
 110         u16 vendor_id;
 111         u16 product_id;
 112         u16 subsys_vendor_id;
 113         u16 subsys_product_id;
 114         u8 rfkill_id;
 115         u8 power;
 116         u8 unknown[4];
 117 };
 118
 119 /* 7 devices fit into the 128 byte buffer */
 120 #define HPWMI_MAX_RFKILL2_DEVICES       7
 121
 122 struct bios_rfkill2_state {
 123         u8 unknown[7];
 124         u8 count;
 125         u8 pad[8];
 126         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 127 };
 128
 129 static const struct key_entry hp_wmi_keymap[] = {
 130         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 131         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 132         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 133         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 134         { KE_KEY, 0x2142, { KEY_MEDIA } },
 135         { KE_KEY, 0x213b, { KEY_INFO } },
 136         { KE_KEY, 0x2169, { KEY_DIRECTION } },
 137         { KE_KEY, 0x216a, { KEY_SETUP } },
 138         { KE_KEY, 0x231b, { KEY_HELP } },
 139         { KE_END, 0 }
 140 };
 141
 142 static struct input_dev *hp_wmi_input_dev;
 143 static struct platform_device *hp_wmi_platform_dev;
 144
 145 static struct rfkill *wifi_rfkill;
 146 static struct rfkill *bluetooth_rfkill;
 147 static struct rfkill *wwan_rfkill;
 148 static struct rfkill *gps_rfkill;
 149
 150 struct rfkill2_device {
 151         u8 id;
 152         int num;
 153         struct rfkill *rfkill;
 154 };
 155
 156 static int rfkill2_count;
 157 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 158
 159 /*
 160  * hp_wmi_perform_query
 161  *
 162  * query:       The commandtype -> What should be queried
 163  * write:       The command -> 0 read, 1 write, 3 ODM specific
 164  * buffer:      Buffer used as input and/or output
 165  * insize:      Size of input buffer
 166  * outsize:     Size of output buffer
 167  *
 168  * returns zero on success
 169  *         an HP WMI query specific error code (which is positive)
 170  *         -EINVAL if the query was not successful at all
 171  *         -EINVAL if the output buffer size exceeds buffersize
 172  *
 173  * Note: The buffersize must at least be the maximum of the input and output
 174  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
 175  *       and 128 byte output. The caller would do:
 176  *       buffer = kzalloc(128, GFP_KERNEL);
 177  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
 178  */
 179 static int hp_wmi_perform_query(int query, int write, void *buffer,
 180                                 int insize, int outsize)
 181 {
 182         struct bios_return *bios_return;
 183         int actual_outsize;
 184         union acpi_object *obj;
 185         struct bios_args args = {
 186                 .signature = 0x55434553,
 187                 .command = write ? 0x2 : 0x1,
 188                 .commandtype = query,
 189                 .datasize = insize,
 190                 .data = 0,
 191         };
 192         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 193         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 194         u32 rc;
 195
 196         if (WARN_ON(insize > sizeof(args.data)))
 197                 return -EINVAL;
 198         memcpy(&args.data, buffer, insize);
 199
 200         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
 201
 202         obj = output.pointer;
 203
 204         if (!obj)
 205                 return -EINVAL;
 206         else if (obj->type != ACPI_TYPE_BUFFER) {
 207                 kfree(obj);
 208                 return -EINVAL;
 209         }
 210
 211         bios_return = (struct bios_return *)obj->buffer.pointer;
 212         rc = bios_return->return_code;
 213
 214         if (rc) {
 215                 if (rc != HPWMI_RET_UNKNOWN_CMDTYPE)
 216                         pr_warn("query 0x%x returned error 0x%x\n", query, rc);
 217                 kfree(obj);
 218                 return rc;
 219         }
 220
 221         if (!outsize) {
 222                 /* ignore output data */
 223                 kfree(obj);
 224                 return 0;
 225         }
 226
 227         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 228         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 229         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 230         kfree(obj);
 231         return 0;
 232 }
 233
 234 static int hp_wmi_display_state(void)
 235 {
 236         int state = 0;
 237         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
 238                                        sizeof(state), sizeof(state));
 239         if (ret)
 240                 return -EINVAL;
 241         return state;
 242 }
 243
 244 static int hp_wmi_hddtemp_state(void)
 245 {
 246         int state = 0;
 247         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
 248                                        sizeof(state), sizeof(state));
 249         if (ret)
 250                 return -EINVAL;
 251         return state;
 252 }
 253
 254 static int hp_wmi_als_state(void)
 255 {
 256         int state = 0;
 257         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
 258                                        sizeof(state), sizeof(state));
 259         if (ret)
 260                 return -EINVAL;
 261         return state;
 262 }
 263
 264 static int hp_wmi_dock_state(void)
 265 {
 266         int state = 0;
 267         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 268                                        sizeof(state), sizeof(state));
 269
 270         if (ret)
 271                 return -EINVAL;
 272
 273         return state & 0x1;
 274 }
 275
 276 static int hp_wmi_tablet_state(void)
 277 {
 278         int state = 0;
 279         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 280                                        sizeof(state), sizeof(state));
 281         if (ret)
 282                 return ret;
 283
 284         return (state & 0x4) ? 1 : 0;
 285 }
 286
 287 static int hp_wmi_set_block(void *data, bool blocked)
 288 {
 289         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 290         int query = BIT(r + 8) | ((!blocked) << r);
 291         int ret;
 292
 293         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 294                                    &query, sizeof(query), 0);
 295         if (ret)
 296                 return -EINVAL;
 297         return 0;
 298 }
 299
 300 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 301         .set_block = hp_wmi_set_block,
 302 };
 303
 304 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 305 {
 306         int wireless = 0;
 307         int mask;
 308         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 309                              &wireless, sizeof(wireless),
 310                              sizeof(wireless));
 311         /* TBD: Pass error */
 312
 313         mask = 0x200 << (r * 8);
 314
 315         if (wireless & mask)
 316                 return false;
 317         else
 318                 return true;
 319 }
 320
 321 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 322 {
 323         int wireless = 0;
 324         int mask;
 325         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 326                              &wireless, sizeof(wireless),
 327                              sizeof(wireless));
 328         /* TBD: Pass error */
 329
 330         mask = 0x800 << (r * 8);
 331
 332         if (wireless & mask)
 333                 return false;
 334         else
 335                 return true;
 336 }
 337
 338 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 339 {
 340         int rfkill_id = (int)(long)data;
 341         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 342
 343         if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
 344                                    buffer, sizeof(buffer), 0))
 345                 return -EINVAL;
 346         return 0;
 347 }
 348
 349 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 350         .set_block = hp_wmi_rfkill2_set_block,
 351 };
 352
 353 static int hp_wmi_rfkill2_refresh(void)
 354 {
 355         int err, i;
 356         struct bios_rfkill2_state state;
 357
 358         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 359                                    0, sizeof(state));
 360         if (err)
 361                 return err;
 362
 363         for (i = 0; i < rfkill2_count; i++) {
 364                 int num = rfkill2[i].num;
 365                 struct bios_rfkill2_device_state *devstate;
 366                 devstate = &state.device[num];
 367
 368                 if (num >= state.count ||
 369                     devstate->rfkill_id != rfkill2[i].id) {
 370                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
 371                         continue;
 372                 }
 373
 374                 rfkill_set_states(rfkill2[i].rfkill,
 375                                   IS_SWBLOCKED(devstate->power),
 376                                   IS_HWBLOCKED(devstate->power));
 377         }
 378
 379         return 0;
 380 }
 381
 382 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 383                             char *buf)
 384 {
 385         int value = hp_wmi_display_state();
 386         if (value < 0)
 387                 return -EINVAL;
 388         return sprintf(buf, "%d\n", value);
 389 }
 390
 391 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 392                             char *buf)
 393 {
 394         int value = hp_wmi_hddtemp_state();
 395         if (value < 0)
 396                 return -EINVAL;
 397         return sprintf(buf, "%d\n", value);
 398 }
 399
 400 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 401                         char *buf)
 402 {
 403         int value = hp_wmi_als_state();
 404         if (value < 0)
 405                 return -EINVAL;
 406         return sprintf(buf, "%d\n", value);
 407 }
 408
 409 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 410                          char *buf)
 411 {
 412         int value = hp_wmi_dock_state();
 413         if (value < 0)
 414                 return -EINVAL;
 415         return sprintf(buf, "%d\n", value);
 416 }
 417
 418 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 419                          char *buf)
 420 {
 421         int value = hp_wmi_tablet_state();
 422         if (value < 0)
 423                 return -EINVAL;
 424         return sprintf(buf, "%d\n", value);
 425 }
 426
 427 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 428                        const char *buf, size_t count)
 429 {
 430         u32 tmp = simple_strtoul(buf, NULL, 10);
 431         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
 432                                        sizeof(tmp), sizeof(tmp));
 433         if (ret)
 434                 return -EINVAL;
 435
 436         return count;
 437 }
 438
 439 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 440 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 441 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 442 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 443 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 444
 445 static void hp_wmi_notify(u32 value, void *context)
 446 {
 447         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 448         union acpi_object *obj;
 449         u32 event_id, event_data;
 450         int key_code = 0, ret;
 451         u32 *location;
 452         acpi_status status;
 453
 454         status = wmi_get_event_data(value, &response);
 455         if (status != AE_OK) {
 456                 pr_info("bad event status 0x%x\n", status);
 457                 return;
 458         }
 459
 460         obj = (union acpi_object *)response.pointer;
 461
 462         if (!obj)
 463                 return;
 464         if (obj->type != ACPI_TYPE_BUFFER) {
 465                 pr_info("Unknown response received %d\n", obj->type);
 466                 kfree(obj);
 467                 return;
 468         }
 469
 470         /*
 471          * Depending on ACPI version the concatenation of id and event data
 472          * inside _WED function will result in a 8 or 16 byte buffer.
 473          */
 474         location = (u32 *)obj->buffer.pointer;
 475         if (obj->buffer.length == 8) {
 476                 event_id = *location;
 477                 event_data = *(location + 1);
 478         } else if (obj->buffer.length == 16) {
 479                 event_id = *location;
 480                 event_data = *(location + 2);
 481         } else {
 482                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
 483                 kfree(obj);
 484                 return;
 485         }
 486         kfree(obj);
 487
 488         switch (event_id) {
 489         case HPWMI_DOCK_EVENT:
 490                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 491                                     hp_wmi_dock_state());
 492                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 493                                     hp_wmi_tablet_state());
 494                 input_sync(hp_wmi_input_dev);
 495                 break;
 496         case HPWMI_PARK_HDD:
 497                 break;
 498         case HPWMI_SMART_ADAPTER:
 499                 break;
 500         case HPWMI_BEZEL_BUTTON:
 501                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 502                                            &key_code,
 503                                            sizeof(key_code),
 504                                            sizeof(key_code));
 505                 if (ret)
 506                         break;
 507
 508                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 509                                                 key_code, 1, true))
 510                         pr_info("Unknown key code - 0x%x\n", key_code);
 511                 break;
 512         case HPWMI_WIRELESS:
 513                 if (rfkill2_count) {
 514                         hp_wmi_rfkill2_refresh();
 515                         break;
 516                 }
 517
 518                 if (wifi_rfkill)
 519                         rfkill_set_states(wifi_rfkill,
 520                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 521                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 522                 if (bluetooth_rfkill)
 523                         rfkill_set_states(bluetooth_rfkill,
 524                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 525                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 526                 if (wwan_rfkill)
 527                         rfkill_set_states(wwan_rfkill,
 528                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 529                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 530                 if (gps_rfkill)
 531                         rfkill_set_states(gps_rfkill,
 532                                           hp_wmi_get_sw_state(HPWMI_GPS),
 533                                           hp_wmi_get_hw_state(HPWMI_GPS));
 534                 break;
 535         case HPWMI_CPU_BATTERY_THROTTLE:
 536                 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
 537                 break;
 538         case HPWMI_LOCK_SWITCH:
 539                 break;
 540         default:
 541                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
 542                 break;
 543         }
 544 }
 545
 546 static int __init hp_wmi_input_setup(void)
 547 {
 548         acpi_status status;
 549         int err;
 550
 551         hp_wmi_input_dev = input_allocate_device();
 552         if (!hp_wmi_input_dev)
 553                 return -ENOMEM;
 554
 555         hp_wmi_input_dev->name = "HP WMI hotkeys";
 556         hp_wmi_input_dev->phys = "wmi/input0";
 557         hp_wmi_input_dev->id.bustype = BUS_HOST;
 558
 559         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 560         __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 561         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 562
 563         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 564         if (err)
 565                 goto err_free_dev;
 566
 567         /* Set initial hardware state */
 568         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
 569         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 570                             hp_wmi_tablet_state());
 571         input_sync(hp_wmi_input_dev);
 572
 573         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 574         if (ACPI_FAILURE(status)) {
 575                 err = -EIO;
 576                 goto err_free_keymap;
 577         }
 578
 579         err = input_register_device(hp_wmi_input_dev);
 580         if (err)
 581                 goto err_uninstall_notifier;
 582
 583         return 0;
 584
 585  err_uninstall_notifier:
 586         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 587  err_free_keymap:
 588         sparse_keymap_free(hp_wmi_input_dev);
 589  err_free_dev:
 590         input_free_device(hp_wmi_input_dev);
 591         return err;
 592 }
 593
 594 static void hp_wmi_input_destroy(void)
 595 {
 596         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 597         sparse_keymap_free(hp_wmi_input_dev);
 598         input_unregister_device(hp_wmi_input_dev);
 599 }
 600
 601 static void cleanup_sysfs(struct platform_device *device)
 602 {
 603         device_remove_file(&device->dev, &dev_attr_display);
 604         device_remove_file(&device->dev, &dev_attr_hddtemp);
 605         device_remove_file(&device->dev, &dev_attr_als);
 606         device_remove_file(&device->dev, &dev_attr_dock);
 607         device_remove_file(&device->dev, &dev_attr_tablet);
 608 }
 609
 610 static int hp_wmi_rfkill_setup(struct platform_device *device)
 611 {
 612         int err;
 613         int wireless = 0;
 614
 615         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
 616                                    sizeof(wireless), sizeof(wireless));
 617         if (err)
 618                 return err;
 619
 620         if (wireless & 0x1) {
 621                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 622                                            RFKILL_TYPE_WLAN,
 623                                            &hp_wmi_rfkill_ops,
 624                                            (void *) HPWMI_WIFI);
 625                 if (!wifi_rfkill)
 626                         return -ENOMEM;
 627                 rfkill_init_sw_state(wifi_rfkill,
 628                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 629                 rfkill_set_hw_state(wifi_rfkill,
 630                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 631                 err = rfkill_register(wifi_rfkill);
 632                 if (err)
 633                         goto register_wifi_error;
 634         }
 635
 636         if (wireless & 0x2) {
 637                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 638                                                 RFKILL_TYPE_BLUETOOTH,
 639                                                 &hp_wmi_rfkill_ops,
 640                                                 (void *) HPWMI_BLUETOOTH);
 641                 if (!bluetooth_rfkill) {
 642                         err = -ENOMEM;
 643                         goto register_wifi_error;
 644                 }
 645                 rfkill_init_sw_state(bluetooth_rfkill,
 646                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 647                 rfkill_set_hw_state(bluetooth_rfkill,
 648                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 649                 err = rfkill_register(bluetooth_rfkill);
 650                 if (err)
 651                         goto register_bluetooth_error;
 652         }
 653
 654         if (wireless & 0x4) {
 655                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 656                                            RFKILL_TYPE_WWAN,
 657                                            &hp_wmi_rfkill_ops,
 658                                            (void *) HPWMI_WWAN);
 659                 if (!wwan_rfkill) {
 660                         err = -ENOMEM;
 661                         goto register_gps_error;
 662                 }
 663                 rfkill_init_sw_state(wwan_rfkill,
 664                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 665                 rfkill_set_hw_state(wwan_rfkill,
 666                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 667                 err = rfkill_register(wwan_rfkill);
 668                 if (err)
 669                         goto register_wwan_err;
 670         }
 671
 672         if (wireless & 0x8) {
 673                 gps_rfkill = rfkill_alloc("hp-gps", &device->dev,
 674                                                 RFKILL_TYPE_GPS,
 675                                                 &hp_wmi_rfkill_ops,
 676                                                 (void *) HPWMI_GPS);
 677                 if (!gps_rfkill) {
 678                         err = -ENOMEM;
 679                         goto register_bluetooth_error;
 680                 }
 681                 rfkill_init_sw_state(gps_rfkill,
 682                                      hp_wmi_get_sw_state(HPWMI_GPS));
 683                 rfkill_set_hw_state(bluetooth_rfkill,
 684                                     hp_wmi_get_hw_state(HPWMI_GPS));
 685                 err = rfkill_register(gps_rfkill);
 686                 if (err)
 687                         goto register_gps_error;
 688         }
 689
 690         return 0;
 691 register_wwan_err:
 692         rfkill_destroy(wwan_rfkill);
 693         wwan_rfkill = NULL;
 694         if (gps_rfkill)
 695                 rfkill_unregister(gps_rfkill);
 696 register_gps_error:
 697         rfkill_destroy(gps_rfkill);
 698         gps_rfkill = NULL;
 699         if (bluetooth_rfkill)
 700                 rfkill_unregister(bluetooth_rfkill);
 701 register_bluetooth_error:
 702         rfkill_destroy(bluetooth_rfkill);
 703         bluetooth_rfkill = NULL;
 704         if (wifi_rfkill)
 705                 rfkill_unregister(wifi_rfkill);
 706 register_wifi_error:
 707         rfkill_destroy(wifi_rfkill);
 708         wifi_rfkill = NULL;
 709         return err;
 710 }
 711
 712 static int hp_wmi_rfkill2_setup(struct platform_device *device)
 713 {
 714         int err, i;
 715         struct bios_rfkill2_state state;
 716         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 717                                    0, sizeof(state));
 718         if (err)
 719                 return err;
 720
 721         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 722                 pr_warn("unable to parse 0x1b query output\n");
 723                 return -EINVAL;
 724         }
 725
 726         for (i = 0; i < state.count; i++) {
 727                 struct rfkill *rfkill;
 728                 enum rfkill_type type;
 729                 char *name;
 730                 switch (state.device[i].radio_type) {
 731                 case HPWMI_WIFI:
 732                         type = RFKILL_TYPE_WLAN;
 733                         name = "hp-wifi";
 734                         break;
 735                 case HPWMI_BLUETOOTH:
 736                         type = RFKILL_TYPE_BLUETOOTH;
 737                         name = "hp-bluetooth";
 738                         break;
 739                 case HPWMI_WWAN:
 740                         type = RFKILL_TYPE_WWAN;
 741                         name = "hp-wwan";
 742                         break;
 743                 case HPWMI_GPS:
 744                         type = RFKILL_TYPE_GPS;
 745                         name = "hp-gps";
 746                         break;
 747                 default:
 748                         pr_warn("unknown device type 0x%x\n",
 749                                 state.device[i].radio_type);
 750                         continue;
 751                 }
 752
 753                 if (!state.device[i].vendor_id) {
 754                         pr_warn("zero device %d while %d reported\n",
 755                                 i, state.count);
 756                         continue;
 757                 }
 758
 759                 rfkill = rfkill_alloc(name, &device->dev, type,
 760                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 761                 if (!rfkill) {
 762                         err = -ENOMEM;
 763                         goto fail;
 764                 }
 765
 766                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 767                 rfkill2[rfkill2_count].num = i;
 768                 rfkill2[rfkill2_count].rfkill = rfkill;
 769
 770                 rfkill_init_sw_state(rfkill,
 771                                      IS_SWBLOCKED(state.device[i].power));
 772                 rfkill_set_hw_state(rfkill,
 773                                     IS_HWBLOCKED(state.device[i].power));
 774
 775                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 776                         pr_info("device %s blocked by BIOS\n", name);
 777
 778                 err = rfkill_register(rfkill);
 779                 if (err) {
 780                         rfkill_destroy(rfkill);
 781                         goto fail;
 782                 }
 783
 784                 rfkill2_count++;
 785         }
 786
 787         return 0;
 788 fail:
 789         for (; rfkill2_count > 0; rfkill2_count--) {
 790                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 791                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 792         }
 793         return err;
 794 }
 795
 796 static int __init hp_wmi_bios_setup(struct platform_device *device)
 797 {
 798         int err;
 799
 800         /* clear detected rfkill devices */
 801         wifi_rfkill = NULL;
 802         bluetooth_rfkill = NULL;
 803         wwan_rfkill = NULL;
 804         gps_rfkill = NULL;
 805         rfkill2_count = 0;
 806
 807         if (hp_wmi_rfkill_setup(device))
 808                 hp_wmi_rfkill2_setup(device);
 809
 810         err = device_create_file(&device->dev, &dev_attr_display);
 811         if (err)
 812                 goto add_sysfs_error;
 813         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 814         if (err)
 815                 goto add_sysfs_error;
 816         err = device_create_file(&device->dev, &dev_attr_als);
 817         if (err)
 818                 goto add_sysfs_error;
 819         err = device_create_file(&device->dev, &dev_attr_dock);
 820         if (err)
 821                 goto add_sysfs_error;
 822         err = device_create_file(&device->dev, &dev_attr_tablet);
 823         if (err)
 824                 goto add_sysfs_error;
 825         return 0;
 826
 827 add_sysfs_error:
 828         cleanup_sysfs(device);
 829         return err;
 830 }
 831
 832 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 833 {
 834         int i;
 835         cleanup_sysfs(device);
 836
 837         for (i = 0; i < rfkill2_count; i++) {
 838                 rfkill_unregister(rfkill2[i].rfkill);
 839                 rfkill_destroy(rfkill2[i].rfkill);
 840         }
 841
 842         if (wifi_rfkill) {
 843                 rfkill_unregister(wifi_rfkill);
 844                 rfkill_destroy(wifi_rfkill);
 845         }
 846         if (bluetooth_rfkill) {
 847                 rfkill_unregister(bluetooth_rfkill);
 848                 rfkill_destroy(bluetooth_rfkill);
 849         }
 850         if (wwan_rfkill) {
 851                 rfkill_unregister(wwan_rfkill);
 852                 rfkill_destroy(wwan_rfkill);
 853         }
 854         if (gps_rfkill) {
 855                 rfkill_unregister(gps_rfkill);
 856                 rfkill_destroy(gps_rfkill);
 857         }
 858
 859         return 0;
 860 }
 861
 862 static int hp_wmi_resume_handler(struct device *device)
 863 {
 864         /*
 865          * Hardware state may have changed while suspended, so trigger
 866          * input events for the current state. As this is a switch,
 867          * the input layer will only actually pass it on if the state
 868          * changed.
 869          */
 870         if (hp_wmi_input_dev) {
 871                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 872                                     hp_wmi_dock_state());
 873                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 874                                     hp_wmi_tablet_state());
 875                 input_sync(hp_wmi_input_dev);
 876         }
 877
 878         if (rfkill2_count)
 879                 hp_wmi_rfkill2_refresh();
 880
 881         if (wifi_rfkill)
 882                 rfkill_set_states(wifi_rfkill,
 883                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 884                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 885         if (bluetooth_rfkill)
 886                 rfkill_set_states(bluetooth_rfkill,
 887                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 888                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 889         if (wwan_rfkill)
 890                 rfkill_set_states(wwan_rfkill,
 891                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 892                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 893         if (gps_rfkill)
 894                 rfkill_set_states(gps_rfkill,
 895                                   hp_wmi_get_sw_state(HPWMI_GPS),
 896                                   hp_wmi_get_hw_state(HPWMI_GPS));
 897
 898         return 0;
 899 }
 900
 901 static const struct dev_pm_ops hp_wmi_pm_ops = {
 902         .resume  = hp_wmi_resume_handler,
 903         .restore  = hp_wmi_resume_handler,
 904 };
 905
 906 static struct platform_driver hp_wmi_driver = {
 907         .driver = {
 908                 .name = "hp-wmi",
 909                 .owner = THIS_MODULE,
 910                 .pm = &hp_wmi_pm_ops,
 911         },
 912         .remove = __exit_p(hp_wmi_bios_remove),
 913 };
 914
 915 static int __init hp_wmi_init(void)
 916 {
 917         int err;
 918         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
 919         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
 920
 921         if (!bios_capable && !event_capable)
 922                 return -ENODEV;
 923
 924         if (event_capable) {
 925                 err = hp_wmi_input_setup();
 926                 if (err)
 927                         return err;
 928
 929                 //Enable magic for hotkeys that run on the SMBus
 930                 ec_write(0xe6,0x6e);
 931         }
 932
 933         if (bios_capable) {
 934                 hp_wmi_platform_dev =
 935                         platform_device_register_simple("hp-wmi", -1, NULL, 0);
 936                 if (IS_ERR(hp_wmi_platform_dev)) {
 937                         err = PTR_ERR(hp_wmi_platform_dev);
 938                         goto err_destroy_input;
 939                 }
 940
 941                 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
 942                 if (err)
 943                         goto err_unregister_device;
 944         }
 945
 946         return 0;
 947
 948 err_unregister_device:
 949         platform_device_unregister(hp_wmi_platform_dev);
 950 err_destroy_input:
 951         if (event_capable)
 952                 hp_wmi_input_destroy();
 953
 954         return err;
 955 }
 956 module_init(hp_wmi_init);
 957
 958 static void __exit hp_wmi_exit(void)
 959 {
 960         if (wmi_has_guid(HPWMI_EVENT_GUID))
 961                 hp_wmi_input_destroy();
 962
 963         if (hp_wmi_platform_dev) {
 964                 platform_device_unregister(hp_wmi_platform_dev);
 965                 platform_driver_unregister(&hp_wmi_driver);
 966         }
 967 }
 968 module_exit(hp_wmi_exit);