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 static int enable_tablet_mode_sw = -1;
  49 module_param(enable_tablet_mode_sw, int, 0444);
  50 MODULE_PARM_DESC(enable_tablet_mode_sw, "Enable SW_TABLET_MODE reporting (-1=auto, 0=no, 1=yes)");
  51
  52 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  53 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
  54
  55 enum hp_wmi_radio {
  56         HPWMI_WIFI      = 0x0,
  57         HPWMI_BLUETOOTH = 0x1,
  58         HPWMI_WWAN      = 0x2,
  59         HPWMI_GPS       = 0x3,
  60 };
  61
  62 enum hp_wmi_event_ids {
  63         HPWMI_DOCK_EVENT                = 0x01,
  64         HPWMI_PARK_HDD                  = 0x02,
  65         HPWMI_SMART_ADAPTER             = 0x03,
  66         HPWMI_BEZEL_BUTTON              = 0x04,
  67         HPWMI_WIRELESS                  = 0x05,
  68         HPWMI_CPU_BATTERY_THROTTLE      = 0x06,
  69         HPWMI_LOCK_SWITCH               = 0x07,
  70         HPWMI_LID_SWITCH                = 0x08,
  71         HPWMI_SCREEN_ROTATION           = 0x09,
  72         HPWMI_COOLSENSE_SYSTEM_MOBILE   = 0x0A,
  73         HPWMI_COOLSENSE_SYSTEM_HOT      = 0x0B,
  74         HPWMI_PROXIMITY_SENSOR          = 0x0C,
  75         HPWMI_BACKLIT_KB_BRIGHTNESS     = 0x0D,
  76         HPWMI_PEAKSHIFT_PERIOD          = 0x0F,
  77         HPWMI_BATTERY_CHARGE_PERIOD     = 0x10,
  78 };
  79
  80 struct bios_args {
  81         u32 signature;
  82         u32 command;
  83         u32 commandtype;
  84         u32 datasize;
  85         u8 data[128];
  86 };
  87
  88 enum hp_wmi_commandtype {
  89         HPWMI_DISPLAY_QUERY             = 0x01,
  90         HPWMI_HDDTEMP_QUERY             = 0x02,
  91         HPWMI_ALS_QUERY                 = 0x03,
  92         HPWMI_HARDWARE_QUERY            = 0x04,
  93         HPWMI_WIRELESS_QUERY            = 0x05,
  94         HPWMI_BATTERY_QUERY             = 0x07,
  95         HPWMI_BIOS_QUERY                = 0x09,
  96         HPWMI_FEATURE_QUERY             = 0x0b,
  97         HPWMI_HOTKEY_QUERY              = 0x0c,
  98         HPWMI_FEATURE2_QUERY            = 0x0d,
  99         HPWMI_WIRELESS2_QUERY           = 0x1b,
 100         HPWMI_POSTCODEERROR_QUERY       = 0x2a,
 101 };
 102
 103 enum hp_wmi_command {
 104         HPWMI_READ      = 0x01,
 105         HPWMI_WRITE     = 0x02,
 106         HPWMI_ODM       = 0x03,
 107 };
 108
 109 enum hp_wmi_hardware_mask {
 110         HPWMI_DOCK_MASK         = 0x01,
 111         HPWMI_TABLET_MASK       = 0x04,
 112 };
 113
 114 struct bios_return {
 115         u32 sigpass;
 116         u32 return_code;
 117 };
 118
 119 enum hp_return_value {
 120         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
 121         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
 122         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
 123         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
 124 };
 125
 126 enum hp_wireless2_bits {
 127         HPWMI_POWER_STATE       = 0x01,
 128         HPWMI_POWER_SOFT        = 0x02,
 129         HPWMI_POWER_BIOS        = 0x04,
 130         HPWMI_POWER_HARD        = 0x08,
 131 };
 132
 133 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
 134                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
 135 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 136
 137 struct bios_rfkill2_device_state {
 138         u8 radio_type;
 139         u8 bus_type;
 140         u16 vendor_id;
 141         u16 product_id;
 142         u16 subsys_vendor_id;
 143         u16 subsys_product_id;
 144         u8 rfkill_id;
 145         u8 power;
 146         u8 unknown[4];
 147 };
 148
 149 /* 7 devices fit into the 128 byte buffer */
 150 #define HPWMI_MAX_RFKILL2_DEVICES       7
 151
 152 struct bios_rfkill2_state {
 153         u8 unknown[7];
 154         u8 count;
 155         u8 pad[8];
 156         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 157 };
 158
 159 static const struct key_entry hp_wmi_keymap[] = {
 160         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 161         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 162         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 163         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 164         { KE_KEY, 0x2142, { KEY_MEDIA } },
 165         { KE_KEY, 0x213b, { KEY_INFO } },
 166         { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
 167         { KE_KEY, 0x216a, { KEY_SETUP } },
 168         { KE_KEY, 0x231b, { KEY_HELP } },
 169         { KE_END, 0 }
 170 };
 171
 172 static struct input_dev *hp_wmi_input_dev;
 173 static struct platform_device *hp_wmi_platform_dev;
 174
 175 static struct rfkill *wifi_rfkill;
 176 static struct rfkill *bluetooth_rfkill;
 177 static struct rfkill *wwan_rfkill;
 178
 179 struct rfkill2_device {
 180         u8 id;
 181         int num;
 182         struct rfkill *rfkill;
 183 };
 184
 185 static int rfkill2_count;
 186 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 187
 188 /* map output size to the corresponding WMI method id */
 189 static inline int encode_outsize_for_pvsz(int outsize)
 190 {
 191         if (outsize > 4096)
 192                 return -EINVAL;
 193         if (outsize > 1024)
 194                 return 5;
 195         if (outsize > 128)
 196                 return 4;
 197         if (outsize > 4)
 198                 return 3;
 199         if (outsize > 0)
 200                 return 2;
 201         return 1;
 202 }
 203
 204 /*
 205  * hp_wmi_perform_query
 206  *
 207  * query:       The commandtype (enum hp_wmi_commandtype)
 208  * write:       The command (enum hp_wmi_command)
 209  * buffer:      Buffer used as input and/or output
 210  * insize:      Size of input buffer
 211  * outsize:     Size of output buffer
 212  *
 213  * returns zero on success
 214  *         an HP WMI query specific error code (which is positive)
 215  *         -EINVAL if the query was not successful at all
 216  *         -EINVAL if the output buffer size exceeds buffersize
 217  *
 218  * Note: The buffersize must at least be the maximum of the input and output
 219  *       size. E.g. Battery info query is defined to have 1 byte input
 220  *       and 128 byte output. The caller would do:
 221  *       buffer = kzalloc(128, GFP_KERNEL);
 222  *       ret = hp_wmi_perform_query(HPWMI_BATTERY_QUERY, HPWMI_READ, buffer, 1, 128)
 223  */
 224 static int hp_wmi_perform_query(int query, enum hp_wmi_command command,
 225                                 void *buffer, int insize, int outsize)
 226 {
 227         int mid;
 228         struct bios_return *bios_return;
 229         int actual_outsize;
 230         union acpi_object *obj;
 231         struct bios_args args = {
 232                 .signature = 0x55434553,
 233                 .command = command,
 234                 .commandtype = query,
 235                 .datasize = insize,
 236                 .data = { 0 },
 237         };
 238         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 239         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 240         int ret = 0;
 241
 242         mid = encode_outsize_for_pvsz(outsize);
 243         if (WARN_ON(mid < 0))
 244                 return mid;
 245
 246         if (WARN_ON(insize > sizeof(args.data)))
 247                 return -EINVAL;
 248         memcpy(&args.data[0], buffer, insize);
 249
 250         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, mid, &input, &output);
 251
 252         obj = output.pointer;
 253
 254         if (!obj)
 255                 return -EINVAL;
 256
 257         if (obj->type != ACPI_TYPE_BUFFER) {
 258                 ret = -EINVAL;
 259                 goto out_free;
 260         }
 261
 262         bios_return = (struct bios_return *)obj->buffer.pointer;
 263         ret = bios_return->return_code;
 264
 265         if (ret) {
 266                 if (ret != HPWMI_RET_UNKNOWN_CMDTYPE)
 267                         pr_warn("query 0x%x returned error 0x%x\n", query, ret);
 268                 goto out_free;
 269         }
 270
 271         /* Ignore output data of zero size */
 272         if (!outsize)
 273                 goto out_free;
 274
 275         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 276         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 277         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 278
 279 out_free:
 280         kfree(obj);
 281         return ret;
 282 }
 283
 284 static int hp_wmi_read_int(int query)
 285 {
 286         int val = 0, ret;
 287
 288         ret = hp_wmi_perform_query(query, HPWMI_READ, &val,
 289                                    sizeof(val), sizeof(val));
 290
 291         if (ret)
 292                 return ret < 0 ? ret : -EINVAL;
 293
 294         return val;
 295 }
 296
 297 static int hp_wmi_hw_state(int mask)
 298 {
 299         int state = hp_wmi_read_int(HPWMI_HARDWARE_QUERY);
 300
 301         if (state < 0)
 302                 return state;
 303
 304         return !!(state & mask);
 305 }
 306
 307 static int __init hp_wmi_bios_2008_later(void)
 308 {
 309         int state = 0;
 310         int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, HPWMI_READ, &state,
 311                                        sizeof(state), sizeof(state));
 312         if (!ret)
 313                 return 1;
 314
 315         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
 316 }
 317
 318 static int __init hp_wmi_bios_2009_later(void)
 319 {
 320         u8 state[128];
 321         int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, HPWMI_READ, &state,
 322                                        sizeof(state), sizeof(state));
 323         if (!ret)
 324                 return 1;
 325
 326         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
 327 }
 328
 329 static int __init hp_wmi_enable_hotkeys(void)
 330 {
 331         int value = 0x6e;
 332         int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, HPWMI_WRITE, &value,
 333                                        sizeof(value), 0);
 334
 335         return ret <= 0 ? ret : -EINVAL;
 336 }
 337
 338 static int hp_wmi_set_block(void *data, bool blocked)
 339 {
 340         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 341         int query = BIT(r + 8) | ((!blocked) << r);
 342         int ret;
 343
 344         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE,
 345                                    &query, sizeof(query), 0);
 346
 347         return ret <= 0 ? ret : -EINVAL;
 348 }
 349
 350 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 351         .set_block = hp_wmi_set_block,
 352 };
 353
 354 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 355 {
 356         int mask = 0x200 << (r * 8);
 357
 358         int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 359
 360         /* TBD: Pass error */
 361         WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
 362
 363         return !(wireless & mask);
 364 }
 365
 366 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 367 {
 368         int mask = 0x800 << (r * 8);
 369
 370         int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 371
 372         /* TBD: Pass error */
 373         WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
 374
 375         return !(wireless & mask);
 376 }
 377
 378 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 379 {
 380         int rfkill_id = (int)(long)data;
 381         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 382         int ret;
 383
 384         ret = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_WRITE,
 385                                    buffer, sizeof(buffer), 0);
 386
 387         return ret <= 0 ? ret : -EINVAL;
 388 }
 389
 390 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 391         .set_block = hp_wmi_rfkill2_set_block,
 392 };
 393
 394 static int hp_wmi_rfkill2_refresh(void)
 395 {
 396         struct bios_rfkill2_state state;
 397         int err, i;
 398
 399         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
 400                                    sizeof(state), sizeof(state));
 401         if (err)
 402                 return err;
 403
 404         for (i = 0; i < rfkill2_count; i++) {
 405                 int num = rfkill2[i].num;
 406                 struct bios_rfkill2_device_state *devstate;
 407                 devstate = &state.device[num];
 408
 409                 if (num >= state.count ||
 410                     devstate->rfkill_id != rfkill2[i].id) {
 411                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
 412                         continue;
 413                 }
 414
 415                 rfkill_set_states(rfkill2[i].rfkill,
 416                                   IS_SWBLOCKED(devstate->power),
 417                                   IS_HWBLOCKED(devstate->power));
 418         }
 419
 420         return 0;
 421 }
 422
 423 static ssize_t display_show(struct device *dev, struct device_attribute *attr,
 424                             char *buf)
 425 {
 426         int value = hp_wmi_read_int(HPWMI_DISPLAY_QUERY);
 427         if (value < 0)
 428                 return value;
 429         return sprintf(buf, "%d\n", value);
 430 }
 431
 432 static ssize_t hddtemp_show(struct device *dev, struct device_attribute *attr,
 433                             char *buf)
 434 {
 435         int value = hp_wmi_read_int(HPWMI_HDDTEMP_QUERY);
 436         if (value < 0)
 437                 return value;
 438         return sprintf(buf, "%d\n", value);
 439 }
 440
 441 static ssize_t als_show(struct device *dev, struct device_attribute *attr,
 442                         char *buf)
 443 {
 444         int value = hp_wmi_read_int(HPWMI_ALS_QUERY);
 445         if (value < 0)
 446                 return value;
 447         return sprintf(buf, "%d\n", value);
 448 }
 449
 450 static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
 451                          char *buf)
 452 {
 453         int value = hp_wmi_hw_state(HPWMI_DOCK_MASK);
 454         if (value < 0)
 455                 return value;
 456         return sprintf(buf, "%d\n", value);
 457 }
 458
 459 static ssize_t tablet_show(struct device *dev, struct device_attribute *attr,
 460                            char *buf)
 461 {
 462         int value = hp_wmi_hw_state(HPWMI_TABLET_MASK);
 463         if (value < 0)
 464                 return value;
 465         return sprintf(buf, "%d\n", value);
 466 }
 467
 468 static ssize_t postcode_show(struct device *dev, struct device_attribute *attr,
 469                              char *buf)
 470 {
 471         /* Get the POST error code of previous boot failure. */
 472         int value = hp_wmi_read_int(HPWMI_POSTCODEERROR_QUERY);
 473         if (value < 0)
 474                 return value;
 475         return sprintf(buf, "0x%x\n", value);
 476 }
 477
 478 static ssize_t als_store(struct device *dev, struct device_attribute *attr,
 479                          const char *buf, size_t count)
 480 {
 481         u32 tmp;
 482         int ret;
 483
 484         ret = kstrtou32(buf, 10, &tmp);
 485         if (ret)
 486                 return ret;
 487
 488         ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp,
 489                                        sizeof(tmp), sizeof(tmp));
 490         if (ret)
 491                 return ret < 0 ? ret : -EINVAL;
 492
 493         return count;
 494 }
 495
 496 static ssize_t postcode_store(struct device *dev, struct device_attribute *attr,
 497                               const char *buf, size_t count)
 498 {
 499         long unsigned int tmp2;
 500         int ret;
 501         u32 tmp;
 502
 503         ret = kstrtoul(buf, 10, &tmp2);
 504         if (!ret && tmp2 != 1)
 505                 ret = -EINVAL;
 506         if (ret)
 507                 goto out;
 508
 509         /* Clear the POST error code. It is kept until until cleared. */
 510         tmp = (u32) tmp2;
 511         ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp,
 512                                        sizeof(tmp), sizeof(tmp));
 513
 514 out:
 515         if (ret)
 516                 return ret < 0 ? ret : -EINVAL;
 517
 518         return count;
 519 }
 520
 521 static DEVICE_ATTR_RO(display);
 522 static DEVICE_ATTR_RO(hddtemp);
 523 static DEVICE_ATTR_RW(als);
 524 static DEVICE_ATTR_RO(dock);
 525 static DEVICE_ATTR_RO(tablet);
 526 static DEVICE_ATTR_RW(postcode);
 527
 528 static void hp_wmi_notify(u32 value, void *context)
 529 {
 530         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 531         u32 event_id, event_data;
 532         union acpi_object *obj;
 533         acpi_status status;
 534         u32 *location;
 535         int key_code;
 536
 537         status = wmi_get_event_data(value, &response);
 538         if (status != AE_OK) {
 539                 pr_info("bad event status 0x%x\n", status);
 540                 return;
 541         }
 542
 543         obj = (union acpi_object *)response.pointer;
 544
 545         if (!obj)
 546                 return;
 547         if (obj->type != ACPI_TYPE_BUFFER) {
 548                 pr_info("Unknown response received %d\n", obj->type);
 549                 kfree(obj);
 550                 return;
 551         }
 552
 553         /*
 554          * Depending on ACPI version the concatenation of id and event data
 555          * inside _WED function will result in a 8 or 16 byte buffer.
 556          */
 557         location = (u32 *)obj->buffer.pointer;
 558         if (obj->buffer.length == 8) {
 559                 event_id = *location;
 560                 event_data = *(location + 1);
 561         } else if (obj->buffer.length == 16) {
 562                 event_id = *location;
 563                 event_data = *(location + 2);
 564         } else {
 565                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
 566                 kfree(obj);
 567                 return;
 568         }
 569         kfree(obj);
 570
 571         switch (event_id) {
 572         case HPWMI_DOCK_EVENT:
 573                 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
 574                         input_report_switch(hp_wmi_input_dev, SW_DOCK,
 575                                             hp_wmi_hw_state(HPWMI_DOCK_MASK));
 576                 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
 577                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 578                                             hp_wmi_hw_state(HPWMI_TABLET_MASK));
 579                 input_sync(hp_wmi_input_dev);
 580                 break;
 581         case HPWMI_PARK_HDD:
 582                 break;
 583         case HPWMI_SMART_ADAPTER:
 584                 break;
 585         case HPWMI_BEZEL_BUTTON:
 586                 key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY);
 587                 if (key_code < 0)
 588                         break;
 589
 590                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 591                                                 key_code, 1, true))
 592                         pr_info("Unknown key code - 0x%x\n", key_code);
 593                 break;
 594         case HPWMI_WIRELESS:
 595                 if (rfkill2_count) {
 596                         hp_wmi_rfkill2_refresh();
 597                         break;
 598                 }
 599
 600                 if (wifi_rfkill)
 601                         rfkill_set_states(wifi_rfkill,
 602                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 603                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 604                 if (bluetooth_rfkill)
 605                         rfkill_set_states(bluetooth_rfkill,
 606                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 607                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 608                 if (wwan_rfkill)
 609                         rfkill_set_states(wwan_rfkill,
 610                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 611                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 612                 break;
 613         case HPWMI_CPU_BATTERY_THROTTLE:
 614                 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
 615                 break;
 616         case HPWMI_LOCK_SWITCH:
 617                 break;
 618         case HPWMI_LID_SWITCH:
 619                 break;
 620         case HPWMI_SCREEN_ROTATION:
 621                 break;
 622         case HPWMI_COOLSENSE_SYSTEM_MOBILE:
 623                 break;
 624         case HPWMI_COOLSENSE_SYSTEM_HOT:
 625                 break;
 626         case HPWMI_PROXIMITY_SENSOR:
 627                 break;
 628         case HPWMI_BACKLIT_KB_BRIGHTNESS:
 629                 break;
 630         case HPWMI_PEAKSHIFT_PERIOD:
 631                 break;
 632         case HPWMI_BATTERY_CHARGE_PERIOD:
 633                 break;
 634         default:
 635                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
 636                 break;
 637         }
 638 }
 639
 640 static int __init hp_wmi_input_setup(void)
 641 {
 642         acpi_status status;
 643         int err, val;
 644
 645         hp_wmi_input_dev = input_allocate_device();
 646         if (!hp_wmi_input_dev)
 647                 return -ENOMEM;
 648
 649         hp_wmi_input_dev->name = "HP WMI hotkeys";
 650         hp_wmi_input_dev->phys = "wmi/input0";
 651         hp_wmi_input_dev->id.bustype = BUS_HOST;
 652
 653         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 654
 655         /* Dock */
 656         val = hp_wmi_hw_state(HPWMI_DOCK_MASK);
 657         if (!(val < 0)) {
 658                 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 659                 input_report_switch(hp_wmi_input_dev, SW_DOCK, val);
 660         }
 661
 662         /* Tablet mode */
 663         if (enable_tablet_mode_sw > 0) {
 664                 val = hp_wmi_hw_state(HPWMI_TABLET_MASK);
 665                 if (val >= 0) {
 666                         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 667                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val);
 668                 }
 669         }
 670
 671         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 672         if (err)
 673                 goto err_free_dev;
 674
 675         /* Set initial hardware state */
 676         input_sync(hp_wmi_input_dev);
 677
 678         if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
 679                 hp_wmi_enable_hotkeys();
 680
 681         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 682         if (ACPI_FAILURE(status)) {
 683                 err = -EIO;
 684                 goto err_free_dev;
 685         }
 686
 687         err = input_register_device(hp_wmi_input_dev);
 688         if (err)
 689                 goto err_uninstall_notifier;
 690
 691         return 0;
 692
 693  err_uninstall_notifier:
 694         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 695  err_free_dev:
 696         input_free_device(hp_wmi_input_dev);
 697         return err;
 698 }
 699
 700 static void hp_wmi_input_destroy(void)
 701 {
 702         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 703         input_unregister_device(hp_wmi_input_dev);
 704 }
 705
 706 static void cleanup_sysfs(struct platform_device *device)
 707 {
 708         device_remove_file(&device->dev, &dev_attr_display);
 709         device_remove_file(&device->dev, &dev_attr_hddtemp);
 710         device_remove_file(&device->dev, &dev_attr_als);
 711         device_remove_file(&device->dev, &dev_attr_dock);
 712         device_remove_file(&device->dev, &dev_attr_tablet);
 713         device_remove_file(&device->dev, &dev_attr_postcode);
 714 }
 715
 716 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
 717 {
 718         int err, wireless;
 719
 720         wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 721         if (wireless < 0)
 722                 return wireless;
 723
 724         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless,
 725                                    sizeof(wireless), 0);
 726         if (err)
 727                 return err;
 728
 729         if (wireless & 0x1) {
 730                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 731                                            RFKILL_TYPE_WLAN,
 732                                            &hp_wmi_rfkill_ops,
 733                                            (void *) HPWMI_WIFI);
 734                 if (!wifi_rfkill)
 735                         return -ENOMEM;
 736                 rfkill_init_sw_state(wifi_rfkill,
 737                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 738                 rfkill_set_hw_state(wifi_rfkill,
 739                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 740                 err = rfkill_register(wifi_rfkill);
 741                 if (err)
 742                         goto register_wifi_error;
 743         }
 744
 745         if (wireless & 0x2) {
 746                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 747                                                 RFKILL_TYPE_BLUETOOTH,
 748                                                 &hp_wmi_rfkill_ops,
 749                                                 (void *) HPWMI_BLUETOOTH);
 750                 if (!bluetooth_rfkill) {
 751                         err = -ENOMEM;
 752                         goto register_bluetooth_error;
 753                 }
 754                 rfkill_init_sw_state(bluetooth_rfkill,
 755                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 756                 rfkill_set_hw_state(bluetooth_rfkill,
 757                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 758                 err = rfkill_register(bluetooth_rfkill);
 759                 if (err)
 760                         goto register_bluetooth_error;
 761         }
 762
 763         if (wireless & 0x4) {
 764                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 765                                            RFKILL_TYPE_WWAN,
 766                                            &hp_wmi_rfkill_ops,
 767                                            (void *) HPWMI_WWAN);
 768                 if (!wwan_rfkill) {
 769                         err = -ENOMEM;
 770                         goto register_wwan_error;
 771                 }
 772                 rfkill_init_sw_state(wwan_rfkill,
 773                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 774                 rfkill_set_hw_state(wwan_rfkill,
 775                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 776                 err = rfkill_register(wwan_rfkill);
 777                 if (err)
 778                         goto register_wwan_error;
 779         }
 780
 781         return 0;
 782
 783 register_wwan_error:
 784         rfkill_destroy(wwan_rfkill);
 785         wwan_rfkill = NULL;
 786         if (bluetooth_rfkill)
 787                 rfkill_unregister(bluetooth_rfkill);
 788 register_bluetooth_error:
 789         rfkill_destroy(bluetooth_rfkill);
 790         bluetooth_rfkill = NULL;
 791         if (wifi_rfkill)
 792                 rfkill_unregister(wifi_rfkill);
 793 register_wifi_error:
 794         rfkill_destroy(wifi_rfkill);
 795         wifi_rfkill = NULL;
 796         return err;
 797 }
 798
 799 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
 800 {
 801         struct bios_rfkill2_state state;
 802         int err, i;
 803
 804         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
 805                                    sizeof(state), sizeof(state));
 806         if (err)
 807                 return err < 0 ? err : -EINVAL;
 808
 809         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 810                 pr_warn("unable to parse 0x1b query output\n");
 811                 return -EINVAL;
 812         }
 813
 814         for (i = 0; i < state.count; i++) {
 815                 struct rfkill *rfkill;
 816                 enum rfkill_type type;
 817                 char *name;
 818                 switch (state.device[i].radio_type) {
 819                 case HPWMI_WIFI:
 820                         type = RFKILL_TYPE_WLAN;
 821                         name = "hp-wifi";
 822                         break;
 823                 case HPWMI_BLUETOOTH:
 824                         type = RFKILL_TYPE_BLUETOOTH;
 825                         name = "hp-bluetooth";
 826                         break;
 827                 case HPWMI_WWAN:
 828                         type = RFKILL_TYPE_WWAN;
 829                         name = "hp-wwan";
 830                         break;
 831                 case HPWMI_GPS:
 832                         type = RFKILL_TYPE_GPS;
 833                         name = "hp-gps";
 834                         break;
 835                 default:
 836                         pr_warn("unknown device type 0x%x\n",
 837                                 state.device[i].radio_type);
 838                         continue;
 839                 }
 840
 841                 if (!state.device[i].vendor_id) {
 842                         pr_warn("zero device %d while %d reported\n",
 843                                 i, state.count);
 844                         continue;
 845                 }
 846
 847                 rfkill = rfkill_alloc(name, &device->dev, type,
 848                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 849                 if (!rfkill) {
 850                         err = -ENOMEM;
 851                         goto fail;
 852                 }
 853
 854                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 855                 rfkill2[rfkill2_count].num = i;
 856                 rfkill2[rfkill2_count].rfkill = rfkill;
 857
 858                 rfkill_init_sw_state(rfkill,
 859                                      IS_SWBLOCKED(state.device[i].power));
 860                 rfkill_set_hw_state(rfkill,
 861                                     IS_HWBLOCKED(state.device[i].power));
 862
 863                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 864                         pr_info("device %s blocked by BIOS\n", name);
 865
 866                 err = rfkill_register(rfkill);
 867                 if (err) {
 868                         rfkill_destroy(rfkill);
 869                         goto fail;
 870                 }
 871
 872                 rfkill2_count++;
 873         }
 874
 875         return 0;
 876 fail:
 877         for (; rfkill2_count > 0; rfkill2_count--) {
 878                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 879                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 880         }
 881         return err;
 882 }
 883
 884 static int __init hp_wmi_bios_setup(struct platform_device *device)
 885 {
 886         int err;
 887
 888         /* clear detected rfkill devices */
 889         wifi_rfkill = NULL;
 890         bluetooth_rfkill = NULL;
 891         wwan_rfkill = NULL;
 892         rfkill2_count = 0;
 893
 894         if (hp_wmi_rfkill_setup(device))
 895                 hp_wmi_rfkill2_setup(device);
 896
 897         err = device_create_file(&device->dev, &dev_attr_display);
 898         if (err)
 899                 goto add_sysfs_error;
 900         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 901         if (err)
 902                 goto add_sysfs_error;
 903         err = device_create_file(&device->dev, &dev_attr_als);
 904         if (err)
 905                 goto add_sysfs_error;
 906         err = device_create_file(&device->dev, &dev_attr_dock);
 907         if (err)
 908                 goto add_sysfs_error;
 909         err = device_create_file(&device->dev, &dev_attr_tablet);
 910         if (err)
 911                 goto add_sysfs_error;
 912         err = device_create_file(&device->dev, &dev_attr_postcode);
 913         if (err)
 914                 goto add_sysfs_error;
 915         return 0;
 916
 917 add_sysfs_error:
 918         cleanup_sysfs(device);
 919         return err;
 920 }
 921
 922 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 923 {
 924         int i;
 925         cleanup_sysfs(device);
 926
 927         for (i = 0; i < rfkill2_count; i++) {
 928                 rfkill_unregister(rfkill2[i].rfkill);
 929                 rfkill_destroy(rfkill2[i].rfkill);
 930         }
 931
 932         if (wifi_rfkill) {
 933                 rfkill_unregister(wifi_rfkill);
 934                 rfkill_destroy(wifi_rfkill);
 935         }
 936         if (bluetooth_rfkill) {
 937                 rfkill_unregister(bluetooth_rfkill);
 938                 rfkill_destroy(bluetooth_rfkill);
 939         }
 940         if (wwan_rfkill) {
 941                 rfkill_unregister(wwan_rfkill);
 942                 rfkill_destroy(wwan_rfkill);
 943         }
 944
 945         return 0;
 946 }
 947
 948 static int hp_wmi_resume_handler(struct device *device)
 949 {
 950         /*
 951          * Hardware state may have changed while suspended, so trigger
 952          * input events for the current state. As this is a switch,
 953          * the input layer will only actually pass it on if the state
 954          * changed.
 955          */
 956         if (hp_wmi_input_dev) {
 957                 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
 958                         input_report_switch(hp_wmi_input_dev, SW_DOCK,
 959                                             hp_wmi_hw_state(HPWMI_DOCK_MASK));
 960                 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
 961                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 962                                             hp_wmi_hw_state(HPWMI_TABLET_MASK));
 963                 input_sync(hp_wmi_input_dev);
 964         }
 965
 966         if (rfkill2_count)
 967                 hp_wmi_rfkill2_refresh();
 968
 969         if (wifi_rfkill)
 970                 rfkill_set_states(wifi_rfkill,
 971                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 972                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 973         if (bluetooth_rfkill)
 974                 rfkill_set_states(bluetooth_rfkill,
 975                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 976                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 977         if (wwan_rfkill)
 978                 rfkill_set_states(wwan_rfkill,
 979                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 980                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 981
 982         return 0;
 983 }
 984
 985 static const struct dev_pm_ops hp_wmi_pm_ops = {
 986         .resume  = hp_wmi_resume_handler,
 987         .restore  = hp_wmi_resume_handler,
 988 };
 989
 990 static struct platform_driver hp_wmi_driver = {
 991         .driver = {
 992                 .name = "hp-wmi",
 993                 .pm = &hp_wmi_pm_ops,
 994         },
 995         .remove = __exit_p(hp_wmi_bios_remove),
 996 };
 997
 998 static int __init hp_wmi_init(void)
 999 {
1000         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
1001         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
1002         int err;
1003
1004         if (!bios_capable && !event_capable)
1005                 return -ENODEV;
1006
1007         if (event_capable) {
1008                 err = hp_wmi_input_setup();
1009                 if (err)
1010                         return err;
1011         }
1012
1013         if (bios_capable) {
1014                 hp_wmi_platform_dev =
1015                         platform_device_register_simple("hp-wmi", -1, NULL, 0);
1016                 if (IS_ERR(hp_wmi_platform_dev)) {
1017                         err = PTR_ERR(hp_wmi_platform_dev);
1018                         goto err_destroy_input;
1019                 }
1020
1021                 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1022                 if (err)
1023                         goto err_unregister_device;
1024         }
1025
1026         return 0;
1027
1028 err_unregister_device:
1029         platform_device_unregister(hp_wmi_platform_dev);
1030 err_destroy_input:
1031         if (event_capable)
1032                 hp_wmi_input_destroy();
1033
1034         return err;
1035 }
1036 module_init(hp_wmi_init);
1037
1038 static void __exit hp_wmi_exit(void)
1039 {
1040         if (wmi_has_guid(HPWMI_EVENT_GUID))
1041                 hp_wmi_input_destroy();
1042
1043         if (hp_wmi_platform_dev) {
1044                 platform_device_unregister(hp_wmi_platform_dev);
1045                 platform_driver_unregister(&hp_wmi_driver);
1046         }
1047 }
1048 module_exit(hp_wmi_exit);