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 };
  67
  68 struct bios_args {
  69         u32 signature;
  70         u32 command;
  71         u32 commandtype;
  72         u32 datasize;
  73         u8 data[128];
  74 };
  75
  76 enum hp_wmi_commandtype {
  77         HPWMI_DISPLAY_QUERY             = 0x01,
  78         HPWMI_HDDTEMP_QUERY             = 0x02,
  79         HPWMI_ALS_QUERY                 = 0x03,
  80         HPWMI_HARDWARE_QUERY            = 0x04,
  81         HPWMI_WIRELESS_QUERY            = 0x05,
  82         HPWMI_BATTERY_QUERY             = 0x07,
  83         HPWMI_BIOS_QUERY                = 0x09,
  84         HPWMI_FEATURE_QUERY             = 0x0b,
  85         HPWMI_HOTKEY_QUERY              = 0x0c,
  86         HPWMI_FEATURE2_QUERY            = 0x0d,
  87         HPWMI_WIRELESS2_QUERY           = 0x1b,
  88         HPWMI_POSTCODEERROR_QUERY       = 0x2a,
  89         HPWMI_THERMAL_POLICY_QUERY      = 0x4c,
  90 };
  91
  92 enum hp_wmi_command {
  93         HPWMI_READ      = 0x01,
  94         HPWMI_WRITE     = 0x02,
  95         HPWMI_ODM       = 0x03,
  96 };
  97
  98 enum hp_wmi_hardware_mask {
  99         HPWMI_DOCK_MASK         = 0x01,
 100         HPWMI_TABLET_MASK       = 0x04,
 101 };
 102
 103 struct bios_return {
 104         u32 sigpass;
 105         u32 return_code;
 106 };
 107
 108 enum hp_return_value {
 109         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
 110         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
 111         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
 112         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
 113 };
 114
 115 enum hp_wireless2_bits {
 116         HPWMI_POWER_STATE       = 0x01,
 117         HPWMI_POWER_SOFT        = 0x02,
 118         HPWMI_POWER_BIOS        = 0x04,
 119         HPWMI_POWER_HARD        = 0x08,
 120         HPWMI_POWER_FW_OR_HW    = HPWMI_POWER_BIOS | HPWMI_POWER_HARD,
 121 };
 122
 123 #define IS_HWBLOCKED(x) ((x & HPWMI_POWER_FW_OR_HW) != HPWMI_POWER_FW_OR_HW)
 124 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 125
 126 struct bios_rfkill2_device_state {
 127         u8 radio_type;
 128         u8 bus_type;
 129         u16 vendor_id;
 130         u16 product_id;
 131         u16 subsys_vendor_id;
 132         u16 subsys_product_id;
 133         u8 rfkill_id;
 134         u8 power;
 135         u8 unknown[4];
 136 };
 137
 138 /* 7 devices fit into the 128 byte buffer */
 139 #define HPWMI_MAX_RFKILL2_DEVICES       7
 140
 141 struct bios_rfkill2_state {
 142         u8 unknown[7];
 143         u8 count;
 144         u8 pad[8];
 145         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 146 };
 147
 148 static const struct key_entry hp_wmi_keymap[] = {
 149         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 150         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 151         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 152         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 153         { KE_KEY, 0x2142, { KEY_MEDIA } },
 154         { KE_KEY, 0x213b, { KEY_INFO } },
 155         { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
 156         { KE_KEY, 0x216a, { KEY_SETUP } },
 157         { KE_KEY, 0x231b, { KEY_HELP } },
 158         { KE_END, 0 }
 159 };
 160
 161 static struct input_dev *hp_wmi_input_dev;
 162 static struct platform_device *hp_wmi_platform_dev;
 163
 164 static struct rfkill *wifi_rfkill;
 165 static struct rfkill *bluetooth_rfkill;
 166 static struct rfkill *wwan_rfkill;
 167
 168 struct rfkill2_device {
 169         u8 id;
 170         int num;
 171         struct rfkill *rfkill;
 172 };
 173
 174 static int rfkill2_count;
 175 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 176
 177 /* map output size to the corresponding WMI method id */
 178 static inline int encode_outsize_for_pvsz(int outsize)
 179 {
 180         if (outsize > 4096)
 181                 return -EINVAL;
 182         if (outsize > 1024)
 183                 return 5;
 184         if (outsize > 128)
 185                 return 4;
 186         if (outsize > 4)
 187                 return 3;
 188         if (outsize > 0)
 189                 return 2;
 190         return 1;
 191 }
 192
 193 /*
 194  * hp_wmi_perform_query
 195  *
 196  * query:       The commandtype (enum hp_wmi_commandtype)
 197  * write:       The command (enum hp_wmi_command)
 198  * buffer:      Buffer used as input and/or output
 199  * insize:      Size of input buffer
 200  * outsize:     Size of output buffer
 201  *
 202  * returns zero on success
 203  *         an HP WMI query specific error code (which is positive)
 204  *         -EINVAL if the query was not successful at all
 205  *         -EINVAL if the output buffer size exceeds buffersize
 206  *
 207  * Note: The buffersize must at least be the maximum of the input and output
 208  *       size. E.g. Battery info query is defined to have 1 byte input
 209  *       and 128 byte output. The caller would do:
 210  *       buffer = kzalloc(128, GFP_KERNEL);
 211  *       ret = hp_wmi_perform_query(HPWMI_BATTERY_QUERY, HPWMI_READ, buffer, 1, 128)
 212  */
 213 static int hp_wmi_perform_query(int query, enum hp_wmi_command command,
 214                                 void *buffer, int insize, int outsize)
 215 {
 216         int mid;
 217         struct bios_return *bios_return;
 218         int actual_outsize;
 219         union acpi_object *obj;
 220         struct bios_args args = {
 221                 .signature = 0x55434553,
 222                 .command = command,
 223                 .commandtype = query,
 224                 .datasize = insize,
 225                 .data = { 0 },
 226         };
 227         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 228         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 229         int ret = 0;
 230
 231         mid = encode_outsize_for_pvsz(outsize);
 232         if (WARN_ON(mid < 0))
 233                 return mid;
 234
 235         if (WARN_ON(insize > sizeof(args.data)))
 236                 return -EINVAL;
 237         memcpy(&args.data[0], buffer, insize);
 238
 239         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, mid, &input, &output);
 240
 241         obj = output.pointer;
 242
 243         if (!obj)
 244                 return -EINVAL;
 245
 246         if (obj->type != ACPI_TYPE_BUFFER) {
 247                 ret = -EINVAL;
 248                 goto out_free;
 249         }
 250
 251         bios_return = (struct bios_return *)obj->buffer.pointer;
 252         ret = bios_return->return_code;
 253
 254         if (ret) {
 255                 if (ret != HPWMI_RET_UNKNOWN_COMMAND &&
 256                     ret != HPWMI_RET_UNKNOWN_CMDTYPE)
 257                         pr_warn("query 0x%x returned error 0x%x\n", query, ret);
 258                 goto out_free;
 259         }
 260
 261         /* Ignore output data of zero size */
 262         if (!outsize)
 263                 goto out_free;
 264
 265         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 266         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 267         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 268
 269 out_free:
 270         kfree(obj);
 271         return ret;
 272 }
 273
 274 static int hp_wmi_read_int(int query)
 275 {
 276         int val = 0, ret;
 277
 278         ret = hp_wmi_perform_query(query, HPWMI_READ, &val,
 279                                    sizeof(val), sizeof(val));
 280
 281         if (ret)
 282                 return ret < 0 ? ret : -EINVAL;
 283
 284         return val;
 285 }
 286
 287 static int hp_wmi_hw_state(int mask)
 288 {
 289         int state = hp_wmi_read_int(HPWMI_HARDWARE_QUERY);
 290
 291         if (state < 0)
 292                 return state;
 293
 294         return !!(state & mask);
 295 }
 296
 297 static int __init hp_wmi_bios_2008_later(void)
 298 {
 299         int state = 0;
 300         int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, HPWMI_READ, &state,
 301                                        sizeof(state), sizeof(state));
 302         if (!ret)
 303                 return 1;
 304
 305         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
 306 }
 307
 308 static int __init hp_wmi_bios_2009_later(void)
 309 {
 310         u8 state[128];
 311         int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, HPWMI_READ, &state,
 312                                        sizeof(state), sizeof(state));
 313         if (!ret)
 314                 return 1;
 315
 316         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
 317 }
 318
 319 static int __init hp_wmi_enable_hotkeys(void)
 320 {
 321         int value = 0x6e;
 322         int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, HPWMI_WRITE, &value,
 323                                        sizeof(value), 0);
 324
 325         return ret <= 0 ? ret : -EINVAL;
 326 }
 327
 328 static int hp_wmi_set_block(void *data, bool blocked)
 329 {
 330         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 331         int query = BIT(r + 8) | ((!blocked) << r);
 332         int ret;
 333
 334         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE,
 335                                    &query, sizeof(query), 0);
 336
 337         return ret <= 0 ? ret : -EINVAL;
 338 }
 339
 340 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 341         .set_block = hp_wmi_set_block,
 342 };
 343
 344 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 345 {
 346         int mask = 0x200 << (r * 8);
 347
 348         int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 349
 350         /* TBD: Pass error */
 351         WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
 352
 353         return !(wireless & mask);
 354 }
 355
 356 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 357 {
 358         int mask = 0x800 << (r * 8);
 359
 360         int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 361
 362         /* TBD: Pass error */
 363         WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
 364
 365         return !(wireless & mask);
 366 }
 367
 368 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 369 {
 370         int rfkill_id = (int)(long)data;
 371         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 372         int ret;
 373
 374         ret = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_WRITE,
 375                                    buffer, sizeof(buffer), 0);
 376
 377         return ret <= 0 ? ret : -EINVAL;
 378 }
 379
 380 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 381         .set_block = hp_wmi_rfkill2_set_block,
 382 };
 383
 384 static int hp_wmi_rfkill2_refresh(void)
 385 {
 386         struct bios_rfkill2_state state;
 387         int err, i;
 388
 389         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
 390                                    sizeof(state), sizeof(state));
 391         if (err)
 392                 return err;
 393
 394         for (i = 0; i < rfkill2_count; i++) {
 395                 int num = rfkill2[i].num;
 396                 struct bios_rfkill2_device_state *devstate;
 397                 devstate = &state.device[num];
 398
 399                 if (num >= state.count ||
 400                     devstate->rfkill_id != rfkill2[i].id) {
 401                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
 402                         continue;
 403                 }
 404
 405                 rfkill_set_states(rfkill2[i].rfkill,
 406                                   IS_SWBLOCKED(devstate->power),
 407                                   IS_HWBLOCKED(devstate->power));
 408         }
 409
 410         return 0;
 411 }
 412
 413 static ssize_t display_show(struct device *dev, struct device_attribute *attr,
 414                             char *buf)
 415 {
 416         int value = hp_wmi_read_int(HPWMI_DISPLAY_QUERY);
 417         if (value < 0)
 418                 return value;
 419         return sprintf(buf, "%d\n", value);
 420 }
 421
 422 static ssize_t hddtemp_show(struct device *dev, struct device_attribute *attr,
 423                             char *buf)
 424 {
 425         int value = hp_wmi_read_int(HPWMI_HDDTEMP_QUERY);
 426         if (value < 0)
 427                 return value;
 428         return sprintf(buf, "%d\n", value);
 429 }
 430
 431 static ssize_t als_show(struct device *dev, struct device_attribute *attr,
 432                         char *buf)
 433 {
 434         int value = hp_wmi_read_int(HPWMI_ALS_QUERY);
 435         if (value < 0)
 436                 return value;
 437         return sprintf(buf, "%d\n", value);
 438 }
 439
 440 static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
 441                          char *buf)
 442 {
 443         int value = hp_wmi_hw_state(HPWMI_DOCK_MASK);
 444         if (value < 0)
 445                 return value;
 446         return sprintf(buf, "%d\n", value);
 447 }
 448
 449 static ssize_t tablet_show(struct device *dev, struct device_attribute *attr,
 450                            char *buf)
 451 {
 452         int value = hp_wmi_hw_state(HPWMI_TABLET_MASK);
 453         if (value < 0)
 454                 return value;
 455         return sprintf(buf, "%d\n", value);
 456 }
 457
 458 static ssize_t postcode_show(struct device *dev, struct device_attribute *attr,
 459                              char *buf)
 460 {
 461         /* Get the POST error code of previous boot failure. */
 462         int value = hp_wmi_read_int(HPWMI_POSTCODEERROR_QUERY);
 463         if (value < 0)
 464                 return value;
 465         return sprintf(buf, "0x%x\n", value);
 466 }
 467
 468 static ssize_t als_store(struct device *dev, struct device_attribute *attr,
 469                          const char *buf, size_t count)
 470 {
 471         u32 tmp;
 472         int ret;
 473
 474         ret = kstrtou32(buf, 10, &tmp);
 475         if (ret)
 476                 return ret;
 477
 478         ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp,
 479                                        sizeof(tmp), sizeof(tmp));
 480         if (ret)
 481                 return ret < 0 ? ret : -EINVAL;
 482
 483         return count;
 484 }
 485
 486 static ssize_t postcode_store(struct device *dev, struct device_attribute *attr,
 487                               const char *buf, size_t count)
 488 {
 489         u32 tmp = 1;
 490         bool clear;
 491         int ret;
 492
 493         ret = kstrtobool(buf, &clear);
 494         if (ret)
 495                 return ret;
 496
 497         if (clear == false)
 498                 return -EINVAL;
 499
 500         /* Clear the POST error code. It is kept until until cleared. */
 501         ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp,
 502                                        sizeof(tmp), sizeof(tmp));
 503         if (ret)
 504                 return ret < 0 ? ret : -EINVAL;
 505
 506         return count;
 507 }
 508
 509 static DEVICE_ATTR_RO(display);
 510 static DEVICE_ATTR_RO(hddtemp);
 511 static DEVICE_ATTR_RW(als);
 512 static DEVICE_ATTR_RO(dock);
 513 static DEVICE_ATTR_RO(tablet);
 514 static DEVICE_ATTR_RW(postcode);
 515
 516 static struct attribute *hp_wmi_attrs[] = {
 517         &dev_attr_display.attr,
 518         &dev_attr_hddtemp.attr,
 519         &dev_attr_als.attr,
 520         &dev_attr_dock.attr,
 521         &dev_attr_tablet.attr,
 522         &dev_attr_postcode.attr,
 523         NULL,
 524 };
 525 ATTRIBUTE_GROUPS(hp_wmi);
 526
 527 static void hp_wmi_notify(u32 value, void *context)
 528 {
 529         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 530         u32 event_id, event_data;
 531         union acpi_object *obj;
 532         acpi_status status;
 533         u32 *location;
 534         int key_code;
 535
 536         status = wmi_get_event_data(value, &response);
 537         if (status != AE_OK) {
 538                 pr_info("bad event status 0x%x\n", status);
 539                 return;
 540         }
 541
 542         obj = (union acpi_object *)response.pointer;
 543
 544         if (!obj)
 545                 return;
 546         if (obj->type != ACPI_TYPE_BUFFER) {
 547                 pr_info("Unknown response received %d\n", obj->type);
 548                 kfree(obj);
 549                 return;
 550         }
 551
 552         /*
 553          * Depending on ACPI version the concatenation of id and event data
 554          * inside _WED function will result in a 8 or 16 byte buffer.
 555          */
 556         location = (u32 *)obj->buffer.pointer;
 557         if (obj->buffer.length == 8) {
 558                 event_id = *location;
 559                 event_data = *(location + 1);
 560         } else if (obj->buffer.length == 16) {
 561                 event_id = *location;
 562                 event_data = *(location + 2);
 563         } else {
 564                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
 565                 kfree(obj);
 566                 return;
 567         }
 568         kfree(obj);
 569
 570         switch (event_id) {
 571         case HPWMI_DOCK_EVENT:
 572                 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
 573                         input_report_switch(hp_wmi_input_dev, SW_DOCK,
 574                                             hp_wmi_hw_state(HPWMI_DOCK_MASK));
 575                 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
 576                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 577                                             hp_wmi_hw_state(HPWMI_TABLET_MASK));
 578                 input_sync(hp_wmi_input_dev);
 579                 break;
 580         case HPWMI_PARK_HDD:
 581                 break;
 582         case HPWMI_SMART_ADAPTER:
 583                 break;
 584         case HPWMI_BEZEL_BUTTON:
 585                 key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY);
 586                 if (key_code < 0)
 587                         break;
 588
 589                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 590                                                 key_code, 1, true))
 591                         pr_info("Unknown key code - 0x%x\n", key_code);
 592                 break;
 593         case HPWMI_WIRELESS:
 594                 if (rfkill2_count) {
 595                         hp_wmi_rfkill2_refresh();
 596                         break;
 597                 }
 598
 599                 if (wifi_rfkill)
 600                         rfkill_set_states(wifi_rfkill,
 601                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 602                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 603                 if (bluetooth_rfkill)
 604                         rfkill_set_states(bluetooth_rfkill,
 605                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 606                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 607                 if (wwan_rfkill)
 608                         rfkill_set_states(wwan_rfkill,
 609                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 610                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 611                 break;
 612         case HPWMI_CPU_BATTERY_THROTTLE:
 613                 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
 614                 break;
 615         case HPWMI_LOCK_SWITCH:
 616                 break;
 617         case HPWMI_LID_SWITCH:
 618                 break;
 619         case HPWMI_SCREEN_ROTATION:
 620                 break;
 621         case HPWMI_COOLSENSE_SYSTEM_MOBILE:
 622                 break;
 623         case HPWMI_COOLSENSE_SYSTEM_HOT:
 624                 break;
 625         case HPWMI_PROXIMITY_SENSOR:
 626                 break;
 627         case HPWMI_BACKLIT_KB_BRIGHTNESS:
 628                 break;
 629         case HPWMI_PEAKSHIFT_PERIOD:
 630                 break;
 631         case HPWMI_BATTERY_CHARGE_PERIOD:
 632                 break;
 633         case HPWMI_SANITIZATION_MODE:
 634                 break;
 635         default:
 636                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
 637                 break;
 638         }
 639 }
 640
 641 static int __init hp_wmi_input_setup(void)
 642 {
 643         acpi_status status;
 644         int err, val;
 645
 646         hp_wmi_input_dev = input_allocate_device();
 647         if (!hp_wmi_input_dev)
 648                 return -ENOMEM;
 649
 650         hp_wmi_input_dev->name = "HP WMI hotkeys";
 651         hp_wmi_input_dev->phys = "wmi/input0";
 652         hp_wmi_input_dev->id.bustype = BUS_HOST;
 653
 654         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 655
 656         /* Dock */
 657         val = hp_wmi_hw_state(HPWMI_DOCK_MASK);
 658         if (!(val < 0)) {
 659                 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 660                 input_report_switch(hp_wmi_input_dev, SW_DOCK, val);
 661         }
 662
 663         /* Tablet mode */
 664         if (enable_tablet_mode_sw > 0) {
 665                 val = hp_wmi_hw_state(HPWMI_TABLET_MASK);
 666                 if (val >= 0) {
 667                         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 668                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val);
 669                 }
 670         }
 671
 672         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 673         if (err)
 674                 goto err_free_dev;
 675
 676         /* Set initial hardware state */
 677         input_sync(hp_wmi_input_dev);
 678
 679         if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
 680                 hp_wmi_enable_hotkeys();
 681
 682         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 683         if (ACPI_FAILURE(status)) {
 684                 err = -EIO;
 685                 goto err_free_dev;
 686         }
 687
 688         err = input_register_device(hp_wmi_input_dev);
 689         if (err)
 690                 goto err_uninstall_notifier;
 691
 692         return 0;
 693
 694  err_uninstall_notifier:
 695         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 696  err_free_dev:
 697         input_free_device(hp_wmi_input_dev);
 698         return err;
 699 }
 700
 701 static void hp_wmi_input_destroy(void)
 702 {
 703         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 704         input_unregister_device(hp_wmi_input_dev);
 705 }
 706
 707 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
 708 {
 709         int err, wireless;
 710
 711         wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 712         if (wireless < 0)
 713                 return wireless;
 714
 715         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless,
 716                                    sizeof(wireless), 0);
 717         if (err)
 718                 return err;
 719
 720         if (wireless & 0x1) {
 721                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 722                                            RFKILL_TYPE_WLAN,
 723                                            &hp_wmi_rfkill_ops,
 724                                            (void *) HPWMI_WIFI);
 725                 if (!wifi_rfkill)
 726                         return -ENOMEM;
 727                 rfkill_init_sw_state(wifi_rfkill,
 728                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 729                 rfkill_set_hw_state(wifi_rfkill,
 730                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 731                 err = rfkill_register(wifi_rfkill);
 732                 if (err)
 733                         goto register_wifi_error;
 734         }
 735
 736         if (wireless & 0x2) {
 737                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 738                                                 RFKILL_TYPE_BLUETOOTH,
 739                                                 &hp_wmi_rfkill_ops,
 740                                                 (void *) HPWMI_BLUETOOTH);
 741                 if (!bluetooth_rfkill) {
 742                         err = -ENOMEM;
 743                         goto register_bluetooth_error;
 744                 }
 745                 rfkill_init_sw_state(bluetooth_rfkill,
 746                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 747                 rfkill_set_hw_state(bluetooth_rfkill,
 748                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 749                 err = rfkill_register(bluetooth_rfkill);
 750                 if (err)
 751                         goto register_bluetooth_error;
 752         }
 753
 754         if (wireless & 0x4) {
 755                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 756                                            RFKILL_TYPE_WWAN,
 757                                            &hp_wmi_rfkill_ops,
 758                                            (void *) HPWMI_WWAN);
 759                 if (!wwan_rfkill) {
 760                         err = -ENOMEM;
 761                         goto register_wwan_error;
 762                 }
 763                 rfkill_init_sw_state(wwan_rfkill,
 764                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 765                 rfkill_set_hw_state(wwan_rfkill,
 766                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 767                 err = rfkill_register(wwan_rfkill);
 768                 if (err)
 769                         goto register_wwan_error;
 770         }
 771
 772         return 0;
 773
 774 register_wwan_error:
 775         rfkill_destroy(wwan_rfkill);
 776         wwan_rfkill = NULL;
 777         if (bluetooth_rfkill)
 778                 rfkill_unregister(bluetooth_rfkill);
 779 register_bluetooth_error:
 780         rfkill_destroy(bluetooth_rfkill);
 781         bluetooth_rfkill = NULL;
 782         if (wifi_rfkill)
 783                 rfkill_unregister(wifi_rfkill);
 784 register_wifi_error:
 785         rfkill_destroy(wifi_rfkill);
 786         wifi_rfkill = NULL;
 787         return err;
 788 }
 789
 790 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
 791 {
 792         struct bios_rfkill2_state state;
 793         int err, i;
 794
 795         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
 796                                    sizeof(state), sizeof(state));
 797         if (err)
 798                 return err < 0 ? err : -EINVAL;
 799
 800         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 801                 pr_warn("unable to parse 0x1b query output\n");
 802                 return -EINVAL;
 803         }
 804
 805         for (i = 0; i < state.count; i++) {
 806                 struct rfkill *rfkill;
 807                 enum rfkill_type type;
 808                 char *name;
 809                 switch (state.device[i].radio_type) {
 810                 case HPWMI_WIFI:
 811                         type = RFKILL_TYPE_WLAN;
 812                         name = "hp-wifi";
 813                         break;
 814                 case HPWMI_BLUETOOTH:
 815                         type = RFKILL_TYPE_BLUETOOTH;
 816                         name = "hp-bluetooth";
 817                         break;
 818                 case HPWMI_WWAN:
 819                         type = RFKILL_TYPE_WWAN;
 820                         name = "hp-wwan";
 821                         break;
 822                 case HPWMI_GPS:
 823                         type = RFKILL_TYPE_GPS;
 824                         name = "hp-gps";
 825                         break;
 826                 default:
 827                         pr_warn("unknown device type 0x%x\n",
 828                                 state.device[i].radio_type);
 829                         continue;
 830                 }
 831
 832                 if (!state.device[i].vendor_id) {
 833                         pr_warn("zero device %d while %d reported\n",
 834                                 i, state.count);
 835                         continue;
 836                 }
 837
 838                 rfkill = rfkill_alloc(name, &device->dev, type,
 839                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 840                 if (!rfkill) {
 841                         err = -ENOMEM;
 842                         goto fail;
 843                 }
 844
 845                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 846                 rfkill2[rfkill2_count].num = i;
 847                 rfkill2[rfkill2_count].rfkill = rfkill;
 848
 849                 rfkill_init_sw_state(rfkill,
 850                                      IS_SWBLOCKED(state.device[i].power));
 851                 rfkill_set_hw_state(rfkill,
 852                                     IS_HWBLOCKED(state.device[i].power));
 853
 854                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 855                         pr_info("device %s blocked by BIOS\n", name);
 856
 857                 err = rfkill_register(rfkill);
 858                 if (err) {
 859                         rfkill_destroy(rfkill);
 860                         goto fail;
 861                 }
 862
 863                 rfkill2_count++;
 864         }
 865
 866         return 0;
 867 fail:
 868         for (; rfkill2_count > 0; rfkill2_count--) {
 869                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 870                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 871         }
 872         return err;
 873 }
 874
 875 static int thermal_policy_setup(struct platform_device *device)
 876 {
 877         int err, tp;
 878
 879         tp = hp_wmi_read_int(HPWMI_THERMAL_POLICY_QUERY);
 880         if (tp < 0)
 881                 return tp;
 882
 883         /*
 884          * call thermal policy write command to ensure that the firmware correctly
 885          * sets the OEM variables for the DPTF
 886          */
 887         err = hp_wmi_perform_query(HPWMI_THERMAL_POLICY_QUERY, HPWMI_WRITE, &tp,
 888                                                            sizeof(tp), 0);
 889         if (err)
 890                 return err;
 891
 892         return 0;
 893 }
 894
 895 static int __init hp_wmi_bios_setup(struct platform_device *device)
 896 {
 897         /* clear detected rfkill devices */
 898         wifi_rfkill = NULL;
 899         bluetooth_rfkill = NULL;
 900         wwan_rfkill = NULL;
 901         rfkill2_count = 0;
 902
 903         if (hp_wmi_rfkill_setup(device))
 904                 hp_wmi_rfkill2_setup(device);
 905
 906         thermal_policy_setup(device);
 907
 908         return 0;
 909 }
 910
 911 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 912 {
 913         int i;
 914
 915         for (i = 0; i < rfkill2_count; i++) {
 916                 rfkill_unregister(rfkill2[i].rfkill);
 917                 rfkill_destroy(rfkill2[i].rfkill);
 918         }
 919
 920         if (wifi_rfkill) {
 921                 rfkill_unregister(wifi_rfkill);
 922                 rfkill_destroy(wifi_rfkill);
 923         }
 924         if (bluetooth_rfkill) {
 925                 rfkill_unregister(bluetooth_rfkill);
 926                 rfkill_destroy(bluetooth_rfkill);
 927         }
 928         if (wwan_rfkill) {
 929                 rfkill_unregister(wwan_rfkill);
 930                 rfkill_destroy(wwan_rfkill);
 931         }
 932
 933         return 0;
 934 }
 935
 936 static int hp_wmi_resume_handler(struct device *device)
 937 {
 938         /*
 939          * Hardware state may have changed while suspended, so trigger
 940          * input events for the current state. As this is a switch,
 941          * the input layer will only actually pass it on if the state
 942          * changed.
 943          */
 944         if (hp_wmi_input_dev) {
 945                 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
 946                         input_report_switch(hp_wmi_input_dev, SW_DOCK,
 947                                             hp_wmi_hw_state(HPWMI_DOCK_MASK));
 948                 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
 949                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 950                                             hp_wmi_hw_state(HPWMI_TABLET_MASK));
 951                 input_sync(hp_wmi_input_dev);
 952         }
 953
 954         if (rfkill2_count)
 955                 hp_wmi_rfkill2_refresh();
 956
 957         if (wifi_rfkill)
 958                 rfkill_set_states(wifi_rfkill,
 959                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 960                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 961         if (bluetooth_rfkill)
 962                 rfkill_set_states(bluetooth_rfkill,
 963                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 964                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 965         if (wwan_rfkill)
 966                 rfkill_set_states(wwan_rfkill,
 967                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 968                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 969
 970         return 0;
 971 }
 972
 973 static const struct dev_pm_ops hp_wmi_pm_ops = {
 974         .resume  = hp_wmi_resume_handler,
 975         .restore  = hp_wmi_resume_handler,
 976 };
 977
 978 static struct platform_driver hp_wmi_driver = {
 979         .driver = {
 980                 .name = "hp-wmi",
 981                 .pm = &hp_wmi_pm_ops,
 982                 .dev_groups = hp_wmi_groups,
 983         },
 984         .remove = __exit_p(hp_wmi_bios_remove),
 985 };
 986
 987 static int __init hp_wmi_init(void)
 988 {
 989         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
 990         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
 991         int err;
 992
 993         if (!bios_capable && !event_capable)
 994                 return -ENODEV;
 995
 996         if (event_capable) {
 997                 err = hp_wmi_input_setup();
 998                 if (err)
 999                         return err;
1000         }
1001
1002         if (bios_capable) {
1003                 hp_wmi_platform_dev =
1004                         platform_device_register_simple("hp-wmi", -1, NULL, 0);
1005                 if (IS_ERR(hp_wmi_platform_dev)) {
1006                         err = PTR_ERR(hp_wmi_platform_dev);
1007                         goto err_destroy_input;
1008                 }
1009
1010                 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1011                 if (err)
1012                         goto err_unregister_device;
1013         }
1014
1015         return 0;
1016
1017 err_unregister_device:
1018         platform_device_unregister(hp_wmi_platform_dev);
1019 err_destroy_input:
1020         if (event_capable)
1021                 hp_wmi_input_destroy();
1022
1023         return err;
1024 }
1025 module_init(hp_wmi_init);
1026
1027 static void __exit hp_wmi_exit(void)
1028 {
1029         if (wmi_has_guid(HPWMI_EVENT_GUID))
1030                 hp_wmi_input_destroy();
1031
1032         if (hp_wmi_platform_dev) {
1033                 platform_device_unregister(hp_wmi_platform_dev);
1034                 platform_driver_unregister(&hp_wmi_driver);
1035         }
1036 }
1037 module_exit(hp_wmi_exit);