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_BIOS_QUERY 0x9
  57 #define HPWMI_FEATURE_QUERY 0xb
  58 #define HPWMI_HOTKEY_QUERY 0xc
  59 #define HPWMI_FEATURE2_QUERY 0xd
  60 #define HPWMI_WIRELESS2_QUERY 0x1b
  61 #define HPWMI_POSTCODEERROR_QUERY 0x2a
  62
  63 enum hp_wmi_radio {
  64         HPWMI_WIFI = 0,
  65         HPWMI_BLUETOOTH = 1,
  66         HPWMI_WWAN = 2,
  67         HPWMI_GPS = 3,
  68 };
  69
  70 enum hp_wmi_event_ids {
  71         HPWMI_DOCK_EVENT = 1,
  72         HPWMI_PARK_HDD = 2,
  73         HPWMI_SMART_ADAPTER = 3,
  74         HPWMI_BEZEL_BUTTON = 4,
  75         HPWMI_WIRELESS = 5,
  76         HPWMI_CPU_BATTERY_THROTTLE = 6,
  77         HPWMI_LOCK_SWITCH = 7,
  78         HPWMI_LID_SWITCH = 8,
  79         HPWMI_SCREEN_ROTATION = 9,
  80         HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
  81         HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
  82         HPWMI_PROXIMITY_SENSOR = 0x0C,
  83         HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
  84         HPWMI_PEAKSHIFT_PERIOD = 0x0F,
  85         HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
  86 };
  87
  88 struct bios_args {
  89         u32 signature;
  90         u32 command;
  91         u32 commandtype;
  92         u32 datasize;
  93         u8 data[128];
  94 };
  95
  96 struct bios_return {
  97         u32 sigpass;
  98         u32 return_code;
  99 };
 100
 101 enum hp_return_value {
 102         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
 103         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
 104         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
 105         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
 106 };
 107
 108 enum hp_wireless2_bits {
 109         HPWMI_POWER_STATE       = 0x01,
 110         HPWMI_POWER_SOFT        = 0x02,
 111         HPWMI_POWER_BIOS        = 0x04,
 112         HPWMI_POWER_HARD        = 0x08,
 113 };
 114
 115 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
 116                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
 117 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 118
 119 struct bios_rfkill2_device_state {
 120         u8 radio_type;
 121         u8 bus_type;
 122         u16 vendor_id;
 123         u16 product_id;
 124         u16 subsys_vendor_id;
 125         u16 subsys_product_id;
 126         u8 rfkill_id;
 127         u8 power;
 128         u8 unknown[4];
 129 };
 130
 131 /* 7 devices fit into the 128 byte buffer */
 132 #define HPWMI_MAX_RFKILL2_DEVICES       7
 133
 134 struct bios_rfkill2_state {
 135         u8 unknown[7];
 136         u8 count;
 137         u8 pad[8];
 138         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 139 };
 140
 141 static const struct key_entry hp_wmi_keymap[] = {
 142         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 143         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 144         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 145         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 146         { KE_KEY, 0x2142, { KEY_MEDIA } },
 147         { KE_KEY, 0x213b, { KEY_INFO } },
 148         { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
 149         { KE_KEY, 0x216a, { KEY_SETUP } },
 150         { KE_KEY, 0x231b, { KEY_HELP } },
 151         { KE_END, 0 }
 152 };
 153
 154 static struct input_dev *hp_wmi_input_dev;
 155 static struct platform_device *hp_wmi_platform_dev;
 156
 157 static struct rfkill *wifi_rfkill;
 158 static struct rfkill *bluetooth_rfkill;
 159 static struct rfkill *wwan_rfkill;
 160
 161 struct rfkill2_device {
 162         u8 id;
 163         int num;
 164         struct rfkill *rfkill;
 165 };
 166
 167 static int rfkill2_count;
 168 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 169
 170 /*
 171  * hp_wmi_perform_query
 172  *
 173  * query:       The commandtype -> What should be queried
 174  * write:       The command -> 0 read, 1 write, 3 ODM specific
 175  * buffer:      Buffer used as input and/or output
 176  * insize:      Size of input buffer
 177  * outsize:     Size of output buffer
 178  *
 179  * returns zero on success
 180  *         an HP WMI query specific error code (which is positive)
 181  *         -EINVAL if the query was not successful at all
 182  *         -EINVAL if the output buffer size exceeds buffersize
 183  *
 184  * Note: The buffersize must at least be the maximum of the input and output
 185  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
 186  *       and 128 byte output. The caller would do:
 187  *       buffer = kzalloc(128, GFP_KERNEL);
 188  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
 189  */
 190 static int hp_wmi_perform_query(int query, int write, void *buffer,
 191                                 int insize, int outsize)
 192 {
 193         struct bios_return *bios_return;
 194         int actual_outsize;
 195         union acpi_object *obj;
 196         struct bios_args args = {
 197                 .signature = 0x55434553,
 198                 .command = write ? 0x2 : 0x1,
 199                 .commandtype = query,
 200                 .datasize = insize,
 201                 .data = { 0 },
 202         };
 203         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 204         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 205         u32 rc;
 206
 207         if (WARN_ON(insize > sizeof(args.data)))
 208                 return -EINVAL;
 209         memcpy(&args.data[0], buffer, insize);
 210
 211         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
 212
 213         obj = output.pointer;
 214
 215         if (!obj)
 216                 return -EINVAL;
 217         else if (obj->type != ACPI_TYPE_BUFFER) {
 218                 kfree(obj);
 219                 return -EINVAL;
 220         }
 221
 222         bios_return = (struct bios_return *)obj->buffer.pointer;
 223         rc = bios_return->return_code;
 224
 225         if (rc) {
 226                 if (rc != HPWMI_RET_UNKNOWN_CMDTYPE)
 227                         pr_warn("query 0x%x returned error 0x%x\n", query, rc);
 228                 kfree(obj);
 229                 return rc;
 230         }
 231
 232         if (!outsize) {
 233                 /* ignore output data */
 234                 kfree(obj);
 235                 return 0;
 236         }
 237
 238         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 239         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 240         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 241         kfree(obj);
 242         return 0;
 243 }
 244
 245 static int hp_wmi_display_state(void)
 246 {
 247         int state = 0;
 248         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
 249                                        sizeof(state), sizeof(state));
 250         if (ret)
 251                 return ret < 0 ? ret : -EINVAL;
 252         return state;
 253 }
 254
 255 static int hp_wmi_hddtemp_state(void)
 256 {
 257         int state = 0;
 258         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
 259                                        sizeof(state), sizeof(state));
 260         if (ret)
 261                 return ret < 0 ? ret : -EINVAL;
 262         return state;
 263 }
 264
 265 static int hp_wmi_als_state(void)
 266 {
 267         int state = 0;
 268         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
 269                                        sizeof(state), sizeof(state));
 270         if (ret)
 271                 return ret < 0 ? ret : -EINVAL;
 272         return state;
 273 }
 274
 275 static int hp_wmi_dock_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
 281         if (ret)
 282                 return ret < 0 ? ret : -EINVAL;
 283
 284         return state & 0x1;
 285 }
 286
 287 static int hp_wmi_tablet_state(void)
 288 {
 289         int state = 0;
 290         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 291                                        sizeof(state), sizeof(state));
 292         if (ret)
 293                 return ret < 0 ? ret : -EINVAL;
 294
 295         return (state & 0x4) ? 1 : 0;
 296 }
 297
 298 static int __init hp_wmi_bios_2008_later(void)
 299 {
 300         int state = 0;
 301         int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, 0, &state,
 302                                        sizeof(state), sizeof(state));
 303         if (!ret)
 304                 return 1;
 305
 306         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
 307 }
 308
 309 static int __init hp_wmi_bios_2009_later(void)
 310 {
 311         u8 state[128];
 312         int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, 0, &state,
 313                                        sizeof(state), sizeof(state));
 314         if (!ret)
 315                 return 1;
 316
 317         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
 318 }
 319
 320 static int __init hp_wmi_enable_hotkeys(void)
 321 {
 322         int value = 0x6e;
 323         int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &value,
 324                                        sizeof(value), 0);
 325         if (ret)
 326                 return ret < 0 ? ret : -EINVAL;
 327         return 0;
 328 }
 329
 330 static int hp_wmi_set_block(void *data, bool blocked)
 331 {
 332         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 333         int query = BIT(r + 8) | ((!blocked) << r);
 334         int ret;
 335
 336         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 337                                    &query, sizeof(query), 0);
 338         if (ret)
 339                 return ret < 0 ? ret : -EINVAL;
 340         return 0;
 341 }
 342
 343 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 344         .set_block = hp_wmi_set_block,
 345 };
 346
 347 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 348 {
 349         int wireless = 0;
 350         int mask;
 351         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 352                              &wireless, sizeof(wireless),
 353                              sizeof(wireless));
 354         /* TBD: Pass error */
 355
 356         mask = 0x200 << (r * 8);
 357
 358         if (wireless & mask)
 359                 return false;
 360         else
 361                 return true;
 362 }
 363
 364 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 365 {
 366         int wireless = 0;
 367         int mask;
 368         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 369                              &wireless, sizeof(wireless),
 370                              sizeof(wireless));
 371         /* TBD: Pass error */
 372
 373         mask = 0x800 << (r * 8);
 374
 375         if (wireless & mask)
 376                 return false;
 377         else
 378                 return true;
 379 }
 380
 381 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 382 {
 383         int rfkill_id = (int)(long)data;
 384         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 385
 386         if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
 387                                    buffer, sizeof(buffer), 0))
 388                 return -EINVAL;
 389         return 0;
 390 }
 391
 392 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 393         .set_block = hp_wmi_rfkill2_set_block,
 394 };
 395
 396 static int hp_wmi_rfkill2_refresh(void)
 397 {
 398         int err, i;
 399         struct bios_rfkill2_state state;
 400
 401         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 402                                    0, sizeof(state));
 403         if (err)
 404                 return err;
 405
 406         for (i = 0; i < rfkill2_count; i++) {
 407                 int num = rfkill2[i].num;
 408                 struct bios_rfkill2_device_state *devstate;
 409                 devstate = &state.device[num];
 410
 411                 if (num >= state.count ||
 412                     devstate->rfkill_id != rfkill2[i].id) {
 413                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
 414                         continue;
 415                 }
 416
 417                 rfkill_set_states(rfkill2[i].rfkill,
 418                                   IS_SWBLOCKED(devstate->power),
 419                                   IS_HWBLOCKED(devstate->power));
 420         }
 421
 422         return 0;
 423 }
 424
 425 static int hp_wmi_post_code_state(void)
 426 {
 427         int state = 0;
 428         int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 0, &state,
 429                                        sizeof(state), sizeof(state));
 430         if (ret)
 431                 return ret < 0 ? ret : -EINVAL;
 432         return state;
 433 }
 434
 435 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 436                             char *buf)
 437 {
 438         int value = hp_wmi_display_state();
 439         if (value < 0)
 440                 return -EINVAL;
 441         return sprintf(buf, "%d\n", value);
 442 }
 443
 444 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 445                             char *buf)
 446 {
 447         int value = hp_wmi_hddtemp_state();
 448         if (value < 0)
 449                 return -EINVAL;
 450         return sprintf(buf, "%d\n", value);
 451 }
 452
 453 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 454                         char *buf)
 455 {
 456         int value = hp_wmi_als_state();
 457         if (value < 0)
 458                 return -EINVAL;
 459         return sprintf(buf, "%d\n", value);
 460 }
 461
 462 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 463                          char *buf)
 464 {
 465         int value = hp_wmi_dock_state();
 466         if (value < 0)
 467                 return -EINVAL;
 468         return sprintf(buf, "%d\n", value);
 469 }
 470
 471 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 472                          char *buf)
 473 {
 474         int value = hp_wmi_tablet_state();
 475         if (value < 0)
 476                 return -EINVAL;
 477         return sprintf(buf, "%d\n", value);
 478 }
 479
 480 static ssize_t show_postcode(struct device *dev, struct device_attribute *attr,
 481                          char *buf)
 482 {
 483         /* Get the POST error code of previous boot failure. */
 484         int value = hp_wmi_post_code_state();
 485         if (value < 0)
 486                 return -EINVAL;
 487         return sprintf(buf, "0x%x\n", value);
 488 }
 489
 490 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 491                        const char *buf, size_t count)
 492 {
 493         u32 tmp = simple_strtoul(buf, NULL, 10);
 494         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
 495                                        sizeof(tmp), sizeof(tmp));
 496         if (ret)
 497                 return ret < 0 ? ret : -EINVAL;
 498
 499         return count;
 500 }
 501
 502 static ssize_t set_postcode(struct device *dev, struct device_attribute *attr,
 503                        const char *buf, size_t count)
 504 {
 505         int ret;
 506         u32 tmp;
 507         long unsigned int tmp2;
 508
 509         ret = kstrtoul(buf, 10, &tmp2);
 510         if (ret || tmp2 != 1)
 511                 return -EINVAL;
 512
 513         /* Clear the POST error code. It is kept until until cleared. */
 514         tmp = (u32) tmp2;
 515         ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 1, &tmp,
 516                                        sizeof(tmp), sizeof(tmp));
 517         if (ret)
 518                 return ret < 0 ? ret : -EINVAL;
 519
 520         return count;
 521 }
 522
 523 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 524 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 525 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 526 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 527 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 528 static DEVICE_ATTR(postcode, S_IRUGO | S_IWUSR, show_postcode, set_postcode);
 529
 530 static void hp_wmi_notify(u32 value, void *context)
 531 {
 532         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 533         union acpi_object *obj;
 534         u32 event_id, event_data;
 535         int key_code = 0, ret;
 536         u32 *location;
 537         acpi_status status;
 538
 539         status = wmi_get_event_data(value, &response);
 540         if (status != AE_OK) {
 541                 pr_info("bad event status 0x%x\n", status);
 542                 return;
 543         }
 544
 545         obj = (union acpi_object *)response.pointer;
 546
 547         if (!obj)
 548                 return;
 549         if (obj->type != ACPI_TYPE_BUFFER) {
 550                 pr_info("Unknown response received %d\n", obj->type);
 551                 kfree(obj);
 552                 return;
 553         }
 554
 555         /*
 556          * Depending on ACPI version the concatenation of id and event data
 557          * inside _WED function will result in a 8 or 16 byte buffer.
 558          */
 559         location = (u32 *)obj->buffer.pointer;
 560         if (obj->buffer.length == 8) {
 561                 event_id = *location;
 562                 event_data = *(location + 1);
 563         } else if (obj->buffer.length == 16) {
 564                 event_id = *location;
 565                 event_data = *(location + 2);
 566         } else {
 567                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
 568                 kfree(obj);
 569                 return;
 570         }
 571         kfree(obj);
 572
 573         switch (event_id) {
 574         case HPWMI_DOCK_EVENT:
 575                 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
 576                         input_report_switch(hp_wmi_input_dev, SW_DOCK,
 577                                             hp_wmi_dock_state());
 578                 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
 579                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 580                                             hp_wmi_tablet_state());
 581                 input_sync(hp_wmi_input_dev);
 582                 break;
 583         case HPWMI_PARK_HDD:
 584                 break;
 585         case HPWMI_SMART_ADAPTER:
 586                 break;
 587         case HPWMI_BEZEL_BUTTON:
 588                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 589                                            &key_code,
 590                                            sizeof(key_code),
 591                                            sizeof(key_code));
 592                 if (ret)
 593                         break;
 594
 595                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 596                                                 key_code, 1, true))
 597                         pr_info("Unknown key code - 0x%x\n", key_code);
 598                 break;
 599         case HPWMI_WIRELESS:
 600                 if (rfkill2_count) {
 601                         hp_wmi_rfkill2_refresh();
 602                         break;
 603                 }
 604
 605                 if (wifi_rfkill)
 606                         rfkill_set_states(wifi_rfkill,
 607                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 608                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 609                 if (bluetooth_rfkill)
 610                         rfkill_set_states(bluetooth_rfkill,
 611                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 612                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 613                 if (wwan_rfkill)
 614                         rfkill_set_states(wwan_rfkill,
 615                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 616                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 617                 break;
 618         case HPWMI_CPU_BATTERY_THROTTLE:
 619                 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
 620                 break;
 621         case HPWMI_LOCK_SWITCH:
 622                 break;
 623         case HPWMI_LID_SWITCH:
 624                 break;
 625         case HPWMI_SCREEN_ROTATION:
 626                 break;
 627         case HPWMI_COOLSENSE_SYSTEM_MOBILE:
 628                 break;
 629         case HPWMI_COOLSENSE_SYSTEM_HOT:
 630                 break;
 631         case HPWMI_PROXIMITY_SENSOR:
 632                 break;
 633         case HPWMI_BACKLIT_KB_BRIGHTNESS:
 634                 break;
 635         case HPWMI_PEAKSHIFT_PERIOD:
 636                 break;
 637         case HPWMI_BATTERY_CHARGE_PERIOD:
 638                 break;
 639         default:
 640                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
 641                 break;
 642         }
 643 }
 644
 645 static int __init hp_wmi_input_setup(void)
 646 {
 647         acpi_status status;
 648         int err;
 649         int val;
 650
 651         hp_wmi_input_dev = input_allocate_device();
 652         if (!hp_wmi_input_dev)
 653                 return -ENOMEM;
 654
 655         hp_wmi_input_dev->name = "HP WMI hotkeys";
 656         hp_wmi_input_dev->phys = "wmi/input0";
 657         hp_wmi_input_dev->id.bustype = BUS_HOST;
 658
 659         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 660
 661         /* Dock */
 662         val = hp_wmi_dock_state();
 663         if (!(val < 0)) {
 664                 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 665                 input_report_switch(hp_wmi_input_dev, SW_DOCK, val);
 666         }
 667
 668         /* Tablet mode */
 669         val = hp_wmi_tablet_state();
 670         if (!(val < 0)) {
 671                 __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 672                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val);
 673         }
 674
 675         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 676         if (err)
 677                 goto err_free_dev;
 678
 679         /* Set initial hardware state */
 680         input_sync(hp_wmi_input_dev);
 681
 682         if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
 683                 hp_wmi_enable_hotkeys();
 684
 685         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 686         if (ACPI_FAILURE(status)) {
 687                 err = -EIO;
 688                 goto err_free_keymap;
 689         }
 690
 691         err = input_register_device(hp_wmi_input_dev);
 692         if (err)
 693                 goto err_uninstall_notifier;
 694
 695         return 0;
 696
 697  err_uninstall_notifier:
 698         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 699  err_free_keymap:
 700         sparse_keymap_free(hp_wmi_input_dev);
 701  err_free_dev:
 702         input_free_device(hp_wmi_input_dev);
 703         return err;
 704 }
 705
 706 static void hp_wmi_input_destroy(void)
 707 {
 708         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 709         sparse_keymap_free(hp_wmi_input_dev);
 710         input_unregister_device(hp_wmi_input_dev);
 711 }
 712
 713 static void cleanup_sysfs(struct platform_device *device)
 714 {
 715         device_remove_file(&device->dev, &dev_attr_display);
 716         device_remove_file(&device->dev, &dev_attr_hddtemp);
 717         device_remove_file(&device->dev, &dev_attr_als);
 718         device_remove_file(&device->dev, &dev_attr_dock);
 719         device_remove_file(&device->dev, &dev_attr_tablet);
 720         device_remove_file(&device->dev, &dev_attr_postcode);
 721 }
 722
 723 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
 724 {
 725         int err;
 726         int wireless = 0;
 727
 728         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
 729                                    sizeof(wireless), sizeof(wireless));
 730         if (err)
 731                 return err;
 732
 733         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, &wireless,
 734                                    sizeof(wireless), 0);
 735         if (err)
 736                 return err;
 737
 738         if (wireless & 0x1) {
 739                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 740                                            RFKILL_TYPE_WLAN,
 741                                            &hp_wmi_rfkill_ops,
 742                                            (void *) HPWMI_WIFI);
 743                 if (!wifi_rfkill)
 744                         return -ENOMEM;
 745                 rfkill_init_sw_state(wifi_rfkill,
 746                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 747                 rfkill_set_hw_state(wifi_rfkill,
 748                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 749                 err = rfkill_register(wifi_rfkill);
 750                 if (err)
 751                         goto register_wifi_error;
 752         }
 753
 754         if (wireless & 0x2) {
 755                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 756                                                 RFKILL_TYPE_BLUETOOTH,
 757                                                 &hp_wmi_rfkill_ops,
 758                                                 (void *) HPWMI_BLUETOOTH);
 759                 if (!bluetooth_rfkill) {
 760                         err = -ENOMEM;
 761                         goto register_bluetooth_error;
 762                 }
 763                 rfkill_init_sw_state(bluetooth_rfkill,
 764                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 765                 rfkill_set_hw_state(bluetooth_rfkill,
 766                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 767                 err = rfkill_register(bluetooth_rfkill);
 768                 if (err)
 769                         goto register_bluetooth_error;
 770         }
 771
 772         if (wireless & 0x4) {
 773                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 774                                            RFKILL_TYPE_WWAN,
 775                                            &hp_wmi_rfkill_ops,
 776                                            (void *) HPWMI_WWAN);
 777                 if (!wwan_rfkill) {
 778                         err = -ENOMEM;
 779                         goto register_wwan_error;
 780                 }
 781                 rfkill_init_sw_state(wwan_rfkill,
 782                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 783                 rfkill_set_hw_state(wwan_rfkill,
 784                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 785                 err = rfkill_register(wwan_rfkill);
 786                 if (err)
 787                         goto register_wwan_error;
 788         }
 789
 790         return 0;
 791
 792 register_wwan_error:
 793         rfkill_destroy(wwan_rfkill);
 794         wwan_rfkill = NULL;
 795         if (bluetooth_rfkill)
 796                 rfkill_unregister(bluetooth_rfkill);
 797 register_bluetooth_error:
 798         rfkill_destroy(bluetooth_rfkill);
 799         bluetooth_rfkill = NULL;
 800         if (wifi_rfkill)
 801                 rfkill_unregister(wifi_rfkill);
 802 register_wifi_error:
 803         rfkill_destroy(wifi_rfkill);
 804         wifi_rfkill = NULL;
 805         return err;
 806 }
 807
 808 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
 809 {
 810         int err, i;
 811         struct bios_rfkill2_state state;
 812         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 813                                    0, sizeof(state));
 814         if (err)
 815                 return err;
 816
 817         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 818                 pr_warn("unable to parse 0x1b query output\n");
 819                 return -EINVAL;
 820         }
 821
 822         for (i = 0; i < state.count; i++) {
 823                 struct rfkill *rfkill;
 824                 enum rfkill_type type;
 825                 char *name;
 826                 switch (state.device[i].radio_type) {
 827                 case HPWMI_WIFI:
 828                         type = RFKILL_TYPE_WLAN;
 829                         name = "hp-wifi";
 830                         break;
 831                 case HPWMI_BLUETOOTH:
 832                         type = RFKILL_TYPE_BLUETOOTH;
 833                         name = "hp-bluetooth";
 834                         break;
 835                 case HPWMI_WWAN:
 836                         type = RFKILL_TYPE_WWAN;
 837                         name = "hp-wwan";
 838                         break;
 839                 case HPWMI_GPS:
 840                         type = RFKILL_TYPE_GPS;
 841                         name = "hp-gps";
 842                         break;
 843                 default:
 844                         pr_warn("unknown device type 0x%x\n",
 845                                 state.device[i].radio_type);
 846                         continue;
 847                 }
 848
 849                 if (!state.device[i].vendor_id) {
 850                         pr_warn("zero device %d while %d reported\n",
 851                                 i, state.count);
 852                         continue;
 853                 }
 854
 855                 rfkill = rfkill_alloc(name, &device->dev, type,
 856                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 857                 if (!rfkill) {
 858                         err = -ENOMEM;
 859                         goto fail;
 860                 }
 861
 862                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 863                 rfkill2[rfkill2_count].num = i;
 864                 rfkill2[rfkill2_count].rfkill = rfkill;
 865
 866                 rfkill_init_sw_state(rfkill,
 867                                      IS_SWBLOCKED(state.device[i].power));
 868                 rfkill_set_hw_state(rfkill,
 869                                     IS_HWBLOCKED(state.device[i].power));
 870
 871                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 872                         pr_info("device %s blocked by BIOS\n", name);
 873
 874                 err = rfkill_register(rfkill);
 875                 if (err) {
 876                         rfkill_destroy(rfkill);
 877                         goto fail;
 878                 }
 879
 880                 rfkill2_count++;
 881         }
 882
 883         return 0;
 884 fail:
 885         for (; rfkill2_count > 0; rfkill2_count--) {
 886                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 887                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 888         }
 889         return err;
 890 }
 891
 892 static int __init hp_wmi_bios_setup(struct platform_device *device)
 893 {
 894         int err;
 895
 896         /* clear detected rfkill devices */
 897         wifi_rfkill = NULL;
 898         bluetooth_rfkill = NULL;
 899         wwan_rfkill = NULL;
 900         rfkill2_count = 0;
 901
 902         /*
 903          * In pre-2009 BIOS, command 1Bh return 0x4 to indicate that
 904          * BIOS no longer controls the power for the wireless
 905          * devices. All features supported by this command will no
 906          * longer be supported.
 907          */
 908         if (!hp_wmi_bios_2009_later()) {
 909                 if (hp_wmi_rfkill_setup(device))
 910                         hp_wmi_rfkill2_setup(device);
 911         }
 912
 913         err = device_create_file(&device->dev, &dev_attr_display);
 914         if (err)
 915                 goto add_sysfs_error;
 916         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 917         if (err)
 918                 goto add_sysfs_error;
 919         err = device_create_file(&device->dev, &dev_attr_als);
 920         if (err)
 921                 goto add_sysfs_error;
 922         err = device_create_file(&device->dev, &dev_attr_dock);
 923         if (err)
 924                 goto add_sysfs_error;
 925         err = device_create_file(&device->dev, &dev_attr_tablet);
 926         if (err)
 927                 goto add_sysfs_error;
 928         err = device_create_file(&device->dev, &dev_attr_postcode);
 929         if (err)
 930                 goto add_sysfs_error;
 931         return 0;
 932
 933 add_sysfs_error:
 934         cleanup_sysfs(device);
 935         return err;
 936 }
 937
 938 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 939 {
 940         int i;
 941         cleanup_sysfs(device);
 942
 943         for (i = 0; i < rfkill2_count; i++) {
 944                 rfkill_unregister(rfkill2[i].rfkill);
 945                 rfkill_destroy(rfkill2[i].rfkill);
 946         }
 947
 948         if (wifi_rfkill) {
 949                 rfkill_unregister(wifi_rfkill);
 950                 rfkill_destroy(wifi_rfkill);
 951         }
 952         if (bluetooth_rfkill) {
 953                 rfkill_unregister(bluetooth_rfkill);
 954                 rfkill_destroy(bluetooth_rfkill);
 955         }
 956         if (wwan_rfkill) {
 957                 rfkill_unregister(wwan_rfkill);
 958                 rfkill_destroy(wwan_rfkill);
 959         }
 960
 961         return 0;
 962 }
 963
 964 static int hp_wmi_resume_handler(struct device *device)
 965 {
 966         /*
 967          * Hardware state may have changed while suspended, so trigger
 968          * input events for the current state. As this is a switch,
 969          * the input layer will only actually pass it on if the state
 970          * changed.
 971          */
 972         if (hp_wmi_input_dev) {
 973                 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
 974                         input_report_switch(hp_wmi_input_dev, SW_DOCK,
 975                                             hp_wmi_dock_state());
 976                 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
 977                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 978                                             hp_wmi_tablet_state());
 979                 input_sync(hp_wmi_input_dev);
 980         }
 981
 982         if (rfkill2_count)
 983                 hp_wmi_rfkill2_refresh();
 984
 985         if (wifi_rfkill)
 986                 rfkill_set_states(wifi_rfkill,
 987                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 988                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 989         if (bluetooth_rfkill)
 990                 rfkill_set_states(bluetooth_rfkill,
 991                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 992                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 993         if (wwan_rfkill)
 994                 rfkill_set_states(wwan_rfkill,
 995                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 996                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 997
 998         return 0;
 999 }
1000
1001 static const struct dev_pm_ops hp_wmi_pm_ops = {
1002         .resume  = hp_wmi_resume_handler,
1003         .restore  = hp_wmi_resume_handler,
1004 };
1005
1006 static struct platform_driver hp_wmi_driver = {
1007         .driver = {
1008                 .name = "hp-wmi",
1009                 .pm = &hp_wmi_pm_ops,
1010         },
1011         .remove = __exit_p(hp_wmi_bios_remove),
1012 };
1013
1014 static int __init hp_wmi_init(void)
1015 {
1016         int err;
1017         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
1018         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
1019
1020         if (!bios_capable && !event_capable)
1021                 return -ENODEV;
1022
1023         if (event_capable) {
1024                 err = hp_wmi_input_setup();
1025                 if (err)
1026                         return err;
1027         }
1028
1029         if (bios_capable) {
1030                 hp_wmi_platform_dev =
1031                         platform_device_register_simple("hp-wmi", -1, NULL, 0);
1032                 if (IS_ERR(hp_wmi_platform_dev)) {
1033                         err = PTR_ERR(hp_wmi_platform_dev);
1034                         goto err_destroy_input;
1035                 }
1036
1037                 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1038                 if (err)
1039                         goto err_unregister_device;
1040         }
1041
1042         return 0;
1043
1044 err_unregister_device:
1045         platform_device_unregister(hp_wmi_platform_dev);
1046 err_destroy_input:
1047         if (event_capable)
1048                 hp_wmi_input_destroy();
1049
1050         return err;
1051 }
1052 module_init(hp_wmi_init);
1053
1054 static void __exit hp_wmi_exit(void)
1055 {
1056         if (wmi_has_guid(HPWMI_EVENT_GUID))
1057                 hp_wmi_input_destroy();
1058
1059         if (hp_wmi_platform_dev) {
1060                 platform_device_unregister(hp_wmi_platform_dev);
1061                 platform_driver_unregister(&hp_wmi_driver);
1062         }
1063 }
1064 module_exit(hp_wmi_exit);