drivers/platform/x86/hp-wmi.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * HP WMI hotkeys
   4  *
   5  * Copyright (C) 2008 Red Hat <mjg@redhat.com>
   6  * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
   7  *
   8  * Portions based on wistron_btns.c:
   9  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
  10  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  11  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  12  */
  13
  14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/slab.h>
  20 #include <linux/types.h>
  21 #include <linux/input.h>
  22 #include <linux/input/sparse-keymap.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/acpi.h>
  25 #include <linux/rfkill.h>
  26 #include <linux/string.h>
  27
  28 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
  29 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
  30 MODULE_LICENSE("GPL");
  31
  32 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
  33 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
  34
  35 static int enable_tablet_mode_sw = -1;
  36 module_param(enable_tablet_mode_sw, int, 0444);
  37 MODULE_PARM_DESC(enable_tablet_mode_sw, "Enable SW_TABLET_MODE reporting (-1=auto, 0=no, 1=yes)");
  38
  39 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  40 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
  41
  42 enum hp_wmi_radio {
  43         HPWMI_WIFI      = 0x0,
  44         HPWMI_BLUETOOTH = 0x1,
  45         HPWMI_WWAN      = 0x2,
  46         HPWMI_GPS       = 0x3,
  47 };
  48
  49 enum hp_wmi_event_ids {
  50         HPWMI_DOCK_EVENT                = 0x01,
  51         HPWMI_PARK_HDD                  = 0x02,
  52         HPWMI_SMART_ADAPTER             = 0x03,
  53         HPWMI_BEZEL_BUTTON              = 0x04,
  54         HPWMI_WIRELESS                  = 0x05,
  55         HPWMI_CPU_BATTERY_THROTTLE      = 0x06,
  56         HPWMI_LOCK_SWITCH               = 0x07,
  57         HPWMI_LID_SWITCH                = 0x08,
  58         HPWMI_SCREEN_ROTATION           = 0x09,
  59         HPWMI_COOLSENSE_SYSTEM_MOBILE   = 0x0A,
  60         HPWMI_COOLSENSE_SYSTEM_HOT      = 0x0B,
  61         HPWMI_PROXIMITY_SENSOR          = 0x0C,
  62         HPWMI_BACKLIT_KB_BRIGHTNESS     = 0x0D,
  63         HPWMI_PEAKSHIFT_PERIOD          = 0x0F,
  64         HPWMI_BATTERY_CHARGE_PERIOD     = 0x10,
  65         HPWMI_SANITIZATION_MODE         = 0x17,
  66         HPWMI_SMART_EXPERIENCE_APP      = 0x21,
  67 };
  68
  69 struct bios_args {
  70         u32 signature;
  71         u32 command;
  72         u32 commandtype;
  73         u32 datasize;
  74         u8 data[128];
  75 };
  76
  77 enum hp_wmi_commandtype {
  78         HPWMI_DISPLAY_QUERY             = 0x01,
  79         HPWMI_HDDTEMP_QUERY             = 0x02,
  80         HPWMI_ALS_QUERY                 = 0x03,
  81         HPWMI_HARDWARE_QUERY            = 0x04,
  82         HPWMI_WIRELESS_QUERY            = 0x05,
  83         HPWMI_BATTERY_QUERY             = 0x07,
  84         HPWMI_BIOS_QUERY                = 0x09,
  85         HPWMI_FEATURE_QUERY             = 0x0b,
  86         HPWMI_HOTKEY_QUERY              = 0x0c,
  87         HPWMI_FEATURE2_QUERY            = 0x0d,
  88         HPWMI_WIRELESS2_QUERY           = 0x1b,
  89         HPWMI_POSTCODEERROR_QUERY       = 0x2a,
  90         HPWMI_THERMAL_POLICY_QUERY      = 0x4c,
  91 };
  92
  93 enum hp_wmi_command {
  94         HPWMI_READ      = 0x01,
  95         HPWMI_WRITE     = 0x02,
  96         HPWMI_ODM       = 0x03,
  97 };
  98
  99 enum hp_wmi_hardware_mask {
 100         HPWMI_DOCK_MASK         = 0x01,
 101         HPWMI_TABLET_MASK       = 0x04,
 102 };
 103
 104 struct bios_return {
 105         u32 sigpass;
 106         u32 return_code;
 107 };
 108
 109 enum hp_return_value {
 110         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
 111         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
 112         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
 113         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
 114 };
 115
 116 enum hp_wireless2_bits {
 117         HPWMI_POWER_STATE       = 0x01,
 118         HPWMI_POWER_SOFT        = 0x02,
 119         HPWMI_POWER_BIOS        = 0x04,
 120         HPWMI_POWER_HARD        = 0x08,
 121         HPWMI_POWER_FW_OR_HW    = HPWMI_POWER_BIOS | HPWMI_POWER_HARD,
 122 };
 123
 124 #define IS_HWBLOCKED(x) ((x & HPWMI_POWER_FW_OR_HW) != HPWMI_POWER_FW_OR_HW)
 125 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 126
 127 struct bios_rfkill2_device_state {
 128         u8 radio_type;
 129         u8 bus_type;
 130         u16 vendor_id;
 131         u16 product_id;
 132         u16 subsys_vendor_id;
 133         u16 subsys_product_id;
 134         u8 rfkill_id;
 135         u8 power;
 136         u8 unknown[4];
 137 };
 138
 139 /* 7 devices fit into the 128 byte buffer */
 140 #define HPWMI_MAX_RFKILL2_DEVICES       7
 141
 142 struct bios_rfkill2_state {
 143         u8 unknown[7];
 144         u8 count;
 145         u8 pad[8];
 146         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 147 };
 148
 149 static const struct key_entry hp_wmi_keymap[] = {
 150         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 151         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 152         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 153         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 154         { KE_KEY, 0x2142, { KEY_MEDIA } },
 155         { KE_KEY, 0x213b, { KEY_INFO } },
 156         { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
 157         { KE_KEY, 0x216a, { KEY_SETUP } },
 158         { KE_KEY, 0x231b, { KEY_HELP } },
 159         { KE_END, 0 }
 160 };
 161
 162 static struct input_dev *hp_wmi_input_dev;
 163 static struct platform_device *hp_wmi_platform_dev;
 164
 165 static struct rfkill *wifi_rfkill;
 166 static struct rfkill *bluetooth_rfkill;
 167 static struct rfkill *wwan_rfkill;
 168
 169 struct rfkill2_device {
 170         u8 id;
 171         int num;
 172         struct rfkill *rfkill;
 173 };
 174
 175 static int rfkill2_count;
 176 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 177
 178 /* map output size to the corresponding WMI method id */
 179 static inline int encode_outsize_for_pvsz(int outsize)
 180 {
 181         if (outsize > 4096)
 182                 return -EINVAL;
 183         if (outsize > 1024)
 184                 return 5;
 185         if (outsize > 128)
 186                 return 4;
 187         if (outsize > 4)
 188                 return 3;
 189         if (outsize > 0)
 190                 return 2;
 191         return 1;
 192 }
 193
 194 /*
 195  * hp_wmi_perform_query
 196  *
 197  * query:       The commandtype (enum hp_wmi_commandtype)
 198  * write:       The command (enum hp_wmi_command)
 199  * buffer:      Buffer used as input and/or output
 200  * insize:      Size of input buffer
 201  * outsize:     Size of output buffer
 202  *
 203  * returns zero on success
 204  *         an HP WMI query specific error code (which is positive)
 205  *         -EINVAL if the query was not successful at all
 206  *         -EINVAL if the output buffer size exceeds buffersize
 207  *
 208  * Note: The buffersize must at least be the maximum of the input and output
 209  *       size. E.g. Battery info query is defined to have 1 byte input
 210  *       and 128 byte output. The caller would do:
 211  *       buffer = kzalloc(128, GFP_KERNEL);
 212  *       ret = hp_wmi_perform_query(HPWMI_BATTERY_QUERY, HPWMI_READ, buffer, 1, 128)
 213  */
 214 static int hp_wmi_perform_query(int query, enum hp_wmi_command command,
 215                                 void *buffer, int insize, int outsize)
 216 {
 217         int mid;
 218         struct bios_return *bios_return;
 219         int actual_outsize;
 220         union acpi_object *obj;
 221         struct bios_args args = {
 222                 .signature = 0x55434553,
 223                 .command = command,
 224                 .commandtype = query,
 225                 .datasize = insize,
 226                 .data = { 0 },
 227         };
 228         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 229         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 230         int ret = 0;
 231
 232         mid = encode_outsize_for_pvsz(outsize);
 233         if (WARN_ON(mid < 0))
 234                 return mid;
 235
 236         if (WARN_ON(insize > sizeof(args.data)))
 237                 return -EINVAL;
 238         memcpy(&args.data[0], buffer, insize);
 239
 240         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, mid, &input, &output);
 241
 242         obj = output.pointer;
 243
 244         if (!obj)
 245                 return -EINVAL;
 246
 247         if (obj->type != ACPI_TYPE_BUFFER) {
 248                 ret = -EINVAL;
 249                 goto out_free;
 250         }
 251
 252         bios_return = (struct bios_return *)obj->buffer.pointer;
 253         ret = bios_return->return_code;
 254
 255         if (ret) {
 256                 if (ret != HPWMI_RET_UNKNOWN_COMMAND &&
 257                     ret != HPWMI_RET_UNKNOWN_CMDTYPE)
 258                         pr_warn("query 0x%x returned error 0x%x\n", query, ret);
 259                 goto out_free;
 260         }
 261
 262         /* Ignore output data of zero size */
 263         if (!outsize)
 264                 goto out_free;
 265
 266         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 267         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 268         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 269
 270 out_free:
 271         kfree(obj);
 272         return ret;
 273 }
 274
 275 static int hp_wmi_read_int(int query)
 276 {
 277         int val = 0, ret;
 278
 279         ret = hp_wmi_perform_query(query, HPWMI_READ, &val,
 280                                    sizeof(val), sizeof(val));
 281
 282         if (ret)
 283                 return ret < 0 ? ret : -EINVAL;
 284
 285         return val;
 286 }
 287
 288 static int hp_wmi_hw_state(int mask)
 289 {
 290         int state = hp_wmi_read_int(HPWMI_HARDWARE_QUERY);
 291
 292         if (state < 0)
 293                 return state;
 294
 295         return !!(state & mask);
 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, HPWMI_READ, &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, HPWMI_READ, &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, HPWMI_WRITE, &value,
 324                                        sizeof(value), 0);
 325
 326         return ret <= 0 ? ret : -EINVAL;
 327 }
 328
 329 static int hp_wmi_set_block(void *data, bool blocked)
 330 {
 331         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 332         int query = BIT(r + 8) | ((!blocked) << r);
 333         int ret;
 334
 335         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE,
 336                                    &query, sizeof(query), 0);
 337
 338         return ret <= 0 ? ret : -EINVAL;
 339 }
 340
 341 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 342         .set_block = hp_wmi_set_block,
 343 };
 344
 345 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 346 {
 347         int mask = 0x200 << (r * 8);
 348
 349         int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 350
 351         /* TBD: Pass error */
 352         WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
 353
 354         return !(wireless & mask);
 355 }
 356
 357 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 358 {
 359         int mask = 0x800 << (r * 8);
 360
 361         int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 362
 363         /* TBD: Pass error */
 364         WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
 365
 366         return !(wireless & mask);
 367 }
 368
 369 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 370 {
 371         int rfkill_id = (int)(long)data;
 372         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 373         int ret;
 374
 375         ret = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_WRITE,
 376                                    buffer, sizeof(buffer), 0);
 377
 378         return ret <= 0 ? ret : -EINVAL;
 379 }
 380
 381 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 382         .set_block = hp_wmi_rfkill2_set_block,
 383 };
 384
 385 static int hp_wmi_rfkill2_refresh(void)
 386 {
 387         struct bios_rfkill2_state state;
 388         int err, i;
 389
 390         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
 391                                    sizeof(state), sizeof(state));
 392         if (err)
 393                 return err;
 394
 395         for (i = 0; i < rfkill2_count; i++) {
 396                 int num = rfkill2[i].num;
 397                 struct bios_rfkill2_device_state *devstate;
 398                 devstate = &state.device[num];
 399
 400                 if (num >= state.count ||
 401                     devstate->rfkill_id != rfkill2[i].id) {
 402                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
 403                         continue;
 404                 }
 405
 406                 rfkill_set_states(rfkill2[i].rfkill,
 407                                   IS_SWBLOCKED(devstate->power),
 408                                   IS_HWBLOCKED(devstate->power));
 409         }
 410
 411         return 0;
 412 }
 413
 414 static ssize_t display_show(struct device *dev, struct device_attribute *attr,
 415                             char *buf)
 416 {
 417         int value = hp_wmi_read_int(HPWMI_DISPLAY_QUERY);
 418         if (value < 0)
 419                 return value;
 420         return sprintf(buf, "%d\n", value);
 421 }
 422
 423 static ssize_t hddtemp_show(struct device *dev, struct device_attribute *attr,
 424                             char *buf)
 425 {
 426         int value = hp_wmi_read_int(HPWMI_HDDTEMP_QUERY);
 427         if (value < 0)
 428                 return value;
 429         return sprintf(buf, "%d\n", value);
 430 }
 431
 432 static ssize_t als_show(struct device *dev, struct device_attribute *attr,
 433                         char *buf)
 434 {
 435         int value = hp_wmi_read_int(HPWMI_ALS_QUERY);
 436         if (value < 0)
 437                 return value;
 438         return sprintf(buf, "%d\n", value);
 439 }
 440
 441 static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
 442                          char *buf)
 443 {
 444         int value = hp_wmi_hw_state(HPWMI_DOCK_MASK);
 445         if (value < 0)
 446                 return value;
 447         return sprintf(buf, "%d\n", value);
 448 }
 449
 450 static ssize_t tablet_show(struct device *dev, struct device_attribute *attr,
 451                            char *buf)
 452 {
 453         int value = hp_wmi_hw_state(HPWMI_TABLET_MASK);
 454         if (value < 0)
 455                 return value;
 456         return sprintf(buf, "%d\n", value);
 457 }
 458
 459 static ssize_t postcode_show(struct device *dev, struct device_attribute *attr,
 460                              char *buf)
 461 {
 462         /* Get the POST error code of previous boot failure. */
 463         int value = hp_wmi_read_int(HPWMI_POSTCODEERROR_QUERY);
 464         if (value < 0)
 465                 return value;
 466         return sprintf(buf, "0x%x\n", value);
 467 }
 468
 469 static ssize_t als_store(struct device *dev, struct device_attribute *attr,
 470                          const char *buf, size_t count)
 471 {
 472         u32 tmp;
 473         int ret;
 474
 475         ret = kstrtou32(buf, 10, &tmp);
 476         if (ret)
 477                 return ret;
 478
 479         ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp,
 480                                        sizeof(tmp), sizeof(tmp));
 481         if (ret)
 482                 return ret < 0 ? ret : -EINVAL;
 483
 484         return count;
 485 }
 486
 487 static ssize_t postcode_store(struct device *dev, struct device_attribute *attr,
 488                               const char *buf, size_t count)
 489 {
 490         u32 tmp = 1;
 491         bool clear;
 492         int ret;
 493
 494         ret = kstrtobool(buf, &clear);
 495         if (ret)
 496                 return ret;
 497
 498         if (clear == false)
 499                 return -EINVAL;
 500
 501         /* Clear the POST error code. It is kept until until cleared. */
 502         ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp,
 503                                        sizeof(tmp), sizeof(tmp));
 504         if (ret)
 505                 return ret < 0 ? ret : -EINVAL;
 506
 507         return count;
 508 }
 509
 510 static DEVICE_ATTR_RO(display);
 511 static DEVICE_ATTR_RO(hddtemp);
 512 static DEVICE_ATTR_RW(als);
 513 static DEVICE_ATTR_RO(dock);
 514 static DEVICE_ATTR_RO(tablet);
 515 static DEVICE_ATTR_RW(postcode);
 516
 517 static struct attribute *hp_wmi_attrs[] = {
 518         &dev_attr_display.attr,
 519         &dev_attr_hddtemp.attr,
 520         &dev_attr_als.attr,
 521         &dev_attr_dock.attr,
 522         &dev_attr_tablet.attr,
 523         &dev_attr_postcode.attr,
 524         NULL,
 525 };
 526 ATTRIBUTE_GROUPS(hp_wmi);
 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         case HPWMI_SANITIZATION_MODE:
 635                 break;
 636         case HPWMI_SMART_EXPERIENCE_APP:
 637                 break;
 638         default:
 639                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
 640                 break;
 641         }
 642 }
 643
 644 static int __init hp_wmi_input_setup(void)
 645 {
 646         acpi_status status;
 647         int err, val;
 648
 649         hp_wmi_input_dev = input_allocate_device();
 650         if (!hp_wmi_input_dev)
 651                 return -ENOMEM;
 652
 653         hp_wmi_input_dev->name = "HP WMI hotkeys";
 654         hp_wmi_input_dev->phys = "wmi/input0";
 655         hp_wmi_input_dev->id.bustype = BUS_HOST;
 656
 657         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 658
 659         /* Dock */
 660         val = hp_wmi_hw_state(HPWMI_DOCK_MASK);
 661         if (!(val < 0)) {
 662                 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 663                 input_report_switch(hp_wmi_input_dev, SW_DOCK, val);
 664         }
 665
 666         /* Tablet mode */
 667         if (enable_tablet_mode_sw > 0) {
 668                 val = hp_wmi_hw_state(HPWMI_TABLET_MASK);
 669                 if (val >= 0) {
 670                         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 671                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val);
 672                 }
 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_dev;
 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_dev:
 700         input_free_device(hp_wmi_input_dev);
 701         return err;
 702 }
 703
 704 static void hp_wmi_input_destroy(void)
 705 {
 706         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 707         input_unregister_device(hp_wmi_input_dev);
 708 }
 709
 710 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
 711 {
 712         int err, wireless;
 713
 714         wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 715         if (wireless < 0)
 716                 return wireless;
 717
 718         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless,
 719                                    sizeof(wireless), 0);
 720         if (err)
 721                 return err;
 722
 723         if (wireless & 0x1) {
 724                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 725                                            RFKILL_TYPE_WLAN,
 726                                            &hp_wmi_rfkill_ops,
 727                                            (void *) HPWMI_WIFI);
 728                 if (!wifi_rfkill)
 729                         return -ENOMEM;
 730                 rfkill_init_sw_state(wifi_rfkill,
 731                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 732                 rfkill_set_hw_state(wifi_rfkill,
 733                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 734                 err = rfkill_register(wifi_rfkill);
 735                 if (err)
 736                         goto register_wifi_error;
 737         }
 738
 739         if (wireless & 0x2) {
 740                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 741                                                 RFKILL_TYPE_BLUETOOTH,
 742                                                 &hp_wmi_rfkill_ops,
 743                                                 (void *) HPWMI_BLUETOOTH);
 744                 if (!bluetooth_rfkill) {
 745                         err = -ENOMEM;
 746                         goto register_bluetooth_error;
 747                 }
 748                 rfkill_init_sw_state(bluetooth_rfkill,
 749                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 750                 rfkill_set_hw_state(bluetooth_rfkill,
 751                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 752                 err = rfkill_register(bluetooth_rfkill);
 753                 if (err)
 754                         goto register_bluetooth_error;
 755         }
 756
 757         if (wireless & 0x4) {
 758                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 759                                            RFKILL_TYPE_WWAN,
 760                                            &hp_wmi_rfkill_ops,
 761                                            (void *) HPWMI_WWAN);
 762                 if (!wwan_rfkill) {
 763                         err = -ENOMEM;
 764                         goto register_wwan_error;
 765                 }
 766                 rfkill_init_sw_state(wwan_rfkill,
 767                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 768                 rfkill_set_hw_state(wwan_rfkill,
 769                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 770                 err = rfkill_register(wwan_rfkill);
 771                 if (err)
 772                         goto register_wwan_error;
 773         }
 774
 775         return 0;
 776
 777 register_wwan_error:
 778         rfkill_destroy(wwan_rfkill);
 779         wwan_rfkill = NULL;
 780         if (bluetooth_rfkill)
 781                 rfkill_unregister(bluetooth_rfkill);
 782 register_bluetooth_error:
 783         rfkill_destroy(bluetooth_rfkill);
 784         bluetooth_rfkill = NULL;
 785         if (wifi_rfkill)
 786                 rfkill_unregister(wifi_rfkill);
 787 register_wifi_error:
 788         rfkill_destroy(wifi_rfkill);
 789         wifi_rfkill = NULL;
 790         return err;
 791 }
 792
 793 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
 794 {
 795         struct bios_rfkill2_state state;
 796         int err, i;
 797
 798         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
 799                                    sizeof(state), sizeof(state));
 800         if (err)
 801                 return err < 0 ? err : -EINVAL;
 802
 803         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 804                 pr_warn("unable to parse 0x1b query output\n");
 805                 return -EINVAL;
 806         }
 807
 808         for (i = 0; i < state.count; i++) {
 809                 struct rfkill *rfkill;
 810                 enum rfkill_type type;
 811                 char *name;
 812                 switch (state.device[i].radio_type) {
 813                 case HPWMI_WIFI:
 814                         type = RFKILL_TYPE_WLAN;
 815                         name = "hp-wifi";
 816                         break;
 817                 case HPWMI_BLUETOOTH:
 818                         type = RFKILL_TYPE_BLUETOOTH;
 819                         name = "hp-bluetooth";
 820                         break;
 821                 case HPWMI_WWAN:
 822                         type = RFKILL_TYPE_WWAN;
 823                         name = "hp-wwan";
 824                         break;
 825                 case HPWMI_GPS:
 826                         type = RFKILL_TYPE_GPS;
 827                         name = "hp-gps";
 828                         break;
 829                 default:
 830                         pr_warn("unknown device type 0x%x\n",
 831                                 state.device[i].radio_type);
 832                         continue;
 833                 }
 834
 835                 if (!state.device[i].vendor_id) {
 836                         pr_warn("zero device %d while %d reported\n",
 837                                 i, state.count);
 838                         continue;
 839                 }
 840
 841                 rfkill = rfkill_alloc(name, &device->dev, type,
 842                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 843                 if (!rfkill) {
 844                         err = -ENOMEM;
 845                         goto fail;
 846                 }
 847
 848                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 849                 rfkill2[rfkill2_count].num = i;
 850                 rfkill2[rfkill2_count].rfkill = rfkill;
 851
 852                 rfkill_init_sw_state(rfkill,
 853                                      IS_SWBLOCKED(state.device[i].power));
 854                 rfkill_set_hw_state(rfkill,
 855                                     IS_HWBLOCKED(state.device[i].power));
 856
 857                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 858                         pr_info("device %s blocked by BIOS\n", name);
 859
 860                 err = rfkill_register(rfkill);
 861                 if (err) {
 862                         rfkill_destroy(rfkill);
 863                         goto fail;
 864                 }
 865
 866                 rfkill2_count++;
 867         }
 868
 869         return 0;
 870 fail:
 871         for (; rfkill2_count > 0; rfkill2_count--) {
 872                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 873                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 874         }
 875         return err;
 876 }
 877
 878 static int thermal_policy_setup(struct platform_device *device)
 879 {
 880         int err, tp;
 881
 882         tp = hp_wmi_read_int(HPWMI_THERMAL_POLICY_QUERY);
 883         if (tp < 0)
 884                 return tp;
 885
 886         /*
 887          * call thermal policy write command to ensure that the firmware correctly
 888          * sets the OEM variables for the DPTF
 889          */
 890         err = hp_wmi_perform_query(HPWMI_THERMAL_POLICY_QUERY, HPWMI_WRITE, &tp,
 891                                                            sizeof(tp), 0);
 892         if (err)
 893                 return err;
 894
 895         return 0;
 896 }
 897
 898 static int __init hp_wmi_bios_setup(struct platform_device *device)
 899 {
 900         /* clear detected rfkill devices */
 901         wifi_rfkill = NULL;
 902         bluetooth_rfkill = NULL;
 903         wwan_rfkill = NULL;
 904         rfkill2_count = 0;
 905
 906         /*
 907          * In pre-2009 BIOS, command 1Bh return 0x4 to indicate that
 908          * BIOS no longer controls the power for the wireless
 909          * devices. All features supported by this command will no
 910          * longer be supported.
 911          */
 912         if (!hp_wmi_bios_2009_later()) {
 913                 if (hp_wmi_rfkill_setup(device))
 914                         hp_wmi_rfkill2_setup(device);
 915         }
 916
 917         thermal_policy_setup(device);
 918
 919         return 0;
 920 }
 921
 922 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 923 {
 924         int i;
 925
 926         for (i = 0; i < rfkill2_count; i++) {
 927                 rfkill_unregister(rfkill2[i].rfkill);
 928                 rfkill_destroy(rfkill2[i].rfkill);
 929         }
 930
 931         if (wifi_rfkill) {
 932                 rfkill_unregister(wifi_rfkill);
 933                 rfkill_destroy(wifi_rfkill);
 934         }
 935         if (bluetooth_rfkill) {
 936                 rfkill_unregister(bluetooth_rfkill);
 937                 rfkill_destroy(bluetooth_rfkill);
 938         }
 939         if (wwan_rfkill) {
 940                 rfkill_unregister(wwan_rfkill);
 941                 rfkill_destroy(wwan_rfkill);
 942         }
 943
 944         return 0;
 945 }
 946
 947 static int hp_wmi_resume_handler(struct device *device)
 948 {
 949         /*
 950          * Hardware state may have changed while suspended, so trigger
 951          * input events for the current state. As this is a switch,
 952          * the input layer will only actually pass it on if the state
 953          * changed.
 954          */
 955         if (hp_wmi_input_dev) {
 956                 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
 957                         input_report_switch(hp_wmi_input_dev, SW_DOCK,
 958                                             hp_wmi_hw_state(HPWMI_DOCK_MASK));
 959                 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
 960                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 961                                             hp_wmi_hw_state(HPWMI_TABLET_MASK));
 962                 input_sync(hp_wmi_input_dev);
 963         }
 964
 965         if (rfkill2_count)
 966                 hp_wmi_rfkill2_refresh();
 967
 968         if (wifi_rfkill)
 969                 rfkill_set_states(wifi_rfkill,
 970                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 971                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 972         if (bluetooth_rfkill)
 973                 rfkill_set_states(bluetooth_rfkill,
 974                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 975                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 976         if (wwan_rfkill)
 977                 rfkill_set_states(wwan_rfkill,
 978                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 979                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 980
 981         return 0;
 982 }
 983
 984 static const struct dev_pm_ops hp_wmi_pm_ops = {
 985         .resume  = hp_wmi_resume_handler,
 986         .restore  = hp_wmi_resume_handler,
 987 };
 988
 989 static struct platform_driver hp_wmi_driver = {
 990         .driver = {
 991                 .name = "hp-wmi",
 992                 .pm = &hp_wmi_pm_ops,
 993                 .dev_groups = hp_wmi_groups,
 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);