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