drivers/platform/x86/hp-wmi.c

   1 /*
   2  * HP WMI hotkeys
   3  *
   4  * Copyright (C) 2008 Red Hat <mjg@redhat.com>
   5  * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
   6  *
   7  * Portions based on wistron_btns.c:
   8  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
   9  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  10  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/types.h>
  34 #include <linux/input.h>
  35 #include <linux/input/sparse-keymap.h>
  36 #include <linux/platform_device.h>
  37 #include <linux/acpi.h>
  38 #include <linux/rfkill.h>
  39 #include <linux/string.h>
  40
  41 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
  42 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
  43 MODULE_LICENSE("GPL");
  44
  45 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
  46 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
  47
  48 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  49 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
  50
  51 #define HPWMI_DISPLAY_QUERY 0x1
  52 #define HPWMI_HDDTEMP_QUERY 0x2
  53 #define HPWMI_ALS_QUERY 0x3
  54 #define HPWMI_HARDWARE_QUERY 0x4
  55 #define HPWMI_WIRELESS_QUERY 0x5
  56 #define HPWMI_BIOS_QUERY 0x9
  57 #define HPWMI_HOTKEY_QUERY 0xc
  58 #define HPWMI_FEATURE_QUERY 0xd
  59 #define HPWMI_WIRELESS2_QUERY 0x1b
  60 #define HPWMI_POSTCODEERROR_QUERY 0x2a
  61
  62 enum hp_wmi_radio {
  63         HPWMI_WIFI = 0,
  64         HPWMI_BLUETOOTH = 1,
  65         HPWMI_WWAN = 2,
  66         HPWMI_GPS = 3,
  67 };
  68
  69 enum hp_wmi_event_ids {
  70         HPWMI_DOCK_EVENT = 1,
  71         HPWMI_PARK_HDD = 2,
  72         HPWMI_SMART_ADAPTER = 3,
  73         HPWMI_BEZEL_BUTTON = 4,
  74         HPWMI_WIRELESS = 5,
  75         HPWMI_CPU_BATTERY_THROTTLE = 6,
  76         HPWMI_LOCK_SWITCH = 7,
  77         HPWMI_LID_SWITCH = 8,
  78         HPWMI_SCREEN_ROTATION = 9,
  79         HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
  80         HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
  81         HPWMI_PROXIMITY_SENSOR = 0x0C,
  82         HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
  83         HPWMI_PEAKSHIFT_PERIOD = 0x0F,
  84         HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
  85 };
  86
  87 struct bios_args {
  88         u32 signature;
  89         u32 command;
  90         u32 commandtype;
  91         u32 datasize;
  92         u32 data;
  93 };
  94
  95 struct bios_return {
  96         u32 sigpass;
  97         u32 return_code;
  98 };
  99
 100 enum hp_return_value {
 101         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
 102         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
 103         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
 104         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
 105 };
 106
 107 enum hp_wireless2_bits {
 108         HPWMI_POWER_STATE       = 0x01,
 109         HPWMI_POWER_SOFT        = 0x02,
 110         HPWMI_POWER_BIOS        = 0x04,
 111         HPWMI_POWER_HARD        = 0x08,
 112 };
 113
 114 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
 115                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
 116 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 117
 118 struct bios_rfkill2_device_state {
 119         u8 radio_type;
 120         u8 bus_type;
 121         u16 vendor_id;
 122         u16 product_id;
 123         u16 subsys_vendor_id;
 124         u16 subsys_product_id;
 125         u8 rfkill_id;
 126         u8 power;
 127         u8 unknown[4];
 128 };
 129
 130 /* 7 devices fit into the 128 byte buffer */
 131 #define HPWMI_MAX_RFKILL2_DEVICES       7
 132
 133 struct bios_rfkill2_state {
 134         u8 unknown[7];
 135         u8 count;
 136         u8 pad[8];
 137         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 138 };
 139
 140 static const struct key_entry hp_wmi_keymap[] = {
 141         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 142         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 143         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 144         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 145         { KE_KEY, 0x2142, { KEY_MEDIA } },
 146         { KE_KEY, 0x213b, { KEY_INFO } },
 147         { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
 148         { KE_KEY, 0x216a, { KEY_SETUP } },
 149         { KE_KEY, 0x231b, { KEY_HELP } },
 150         { KE_END, 0 }
 151 };
 152
 153 static struct input_dev *hp_wmi_input_dev;
 154 static struct platform_device *hp_wmi_platform_dev;
 155
 156 static struct rfkill *wifi_rfkill;
 157 static struct rfkill *bluetooth_rfkill;
 158 static struct rfkill *wwan_rfkill;
 159 static struct rfkill *gps_rfkill;
 160
 161 struct rfkill2_device {
 162         u8 id;
 163         int num;
 164         struct rfkill *rfkill;
 165 };
 166
 167 static int rfkill2_count;
 168 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 169
 170 /*
 171  * hp_wmi_perform_query
 172  *
 173  * query:       The commandtype -> What should be queried
 174  * write:       The command -> 0 read, 1 write, 3 ODM specific
 175  * buffer:      Buffer used as input and/or output
 176  * insize:      Size of input buffer
 177  * outsize:     Size of output buffer
 178  *
 179  * returns zero on success
 180  *         an HP WMI query specific error code (which is positive)
 181  *         -EINVAL if the query was not successful at all
 182  *         -EINVAL if the output buffer size exceeds buffersize
 183  *
 184  * Note: The buffersize must at least be the maximum of the input and output
 185  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
 186  *       and 128 byte output. The caller would do:
 187  *       buffer = kzalloc(128, GFP_KERNEL);
 188  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
 189  */
 190 static int hp_wmi_perform_query(int query, int write, void *buffer,
 191                                 int insize, int outsize)
 192 {
 193         struct bios_return *bios_return;
 194         int actual_outsize;
 195         union acpi_object *obj;
 196         struct bios_args args = {
 197                 .signature = 0x55434553,
 198                 .command = write ? 0x2 : 0x1,
 199                 .commandtype = query,
 200                 .datasize = insize,
 201                 .data = 0,
 202         };
 203         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 204         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 205         u32 rc;
 206
 207         if (WARN_ON(insize > sizeof(args.data)))
 208                 return -EINVAL;
 209         memcpy(&args.data, buffer, insize);
 210
 211         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
 212
 213         obj = output.pointer;
 214
 215         if (!obj)
 216                 return -EINVAL;
 217         else if (obj->type != ACPI_TYPE_BUFFER) {
 218                 kfree(obj);
 219                 return -EINVAL;
 220         }
 221
 222         bios_return = (struct bios_return *)obj->buffer.pointer;
 223         rc = bios_return->return_code;
 224
 225         if (rc) {
 226                 if (rc != HPWMI_RET_UNKNOWN_CMDTYPE)
 227                         pr_warn("query 0x%x returned error 0x%x\n", query, rc);
 228                 kfree(obj);
 229                 return rc;
 230         }
 231
 232         if (!outsize) {
 233                 /* ignore output data */
 234                 kfree(obj);
 235                 return 0;
 236         }
 237
 238         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 239         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 240         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 241         kfree(obj);
 242         return 0;
 243 }
 244
 245 static int hp_wmi_display_state(void)
 246 {
 247         int state = 0;
 248         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
 249                                        sizeof(state), sizeof(state));
 250         if (ret)
 251                 return -EINVAL;
 252         return state;
 253 }
 254
 255 static int hp_wmi_hddtemp_state(void)
 256 {
 257         int state = 0;
 258         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
 259                                        sizeof(state), sizeof(state));
 260         if (ret)
 261                 return -EINVAL;
 262         return state;
 263 }
 264
 265 static int hp_wmi_als_state(void)
 266 {
 267         int state = 0;
 268         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
 269                                        sizeof(state), sizeof(state));
 270         if (ret)
 271                 return -EINVAL;
 272         return state;
 273 }
 274
 275 static int hp_wmi_dock_state(void)
 276 {
 277         int state = 0;
 278         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 279                                        sizeof(state), sizeof(state));
 280
 281         if (ret)
 282                 return -EINVAL;
 283
 284         return state & 0x1;
 285 }
 286
 287 static int hp_wmi_tablet_state(void)
 288 {
 289         int state = 0;
 290         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 291                                        sizeof(state), sizeof(state));
 292         if (ret)
 293                 return ret;
 294
 295         return (state & 0x4) ? 1 : 0;
 296 }
 297
 298 static int __init hp_wmi_bios_2009_later(void)
 299 {
 300         int state = 0;
 301         int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, 0, &state,
 302                                        sizeof(state), sizeof(state));
 303         if (ret)
 304                 return ret;
 305
 306         return (state & 0x10) ? 1 : 0;
 307 }
 308
 309 static int hp_wmi_enable_hotkeys(void)
 310 {
 311         int ret;
 312         int query = 0x6e;
 313
 314         ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &query, sizeof(query),
 315                                    0);
 316
 317         if (ret)
 318                 return -EINVAL;
 319         return 0;
 320 }
 321
 322 static int hp_wmi_set_block(void *data, bool blocked)
 323 {
 324         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 325         int query = BIT(r + 8) | ((!blocked) << r);
 326         int ret;
 327
 328         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 329                                    &query, sizeof(query), 0);
 330         if (ret)
 331                 return -EINVAL;
 332         return 0;
 333 }
 334
 335 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 336         .set_block = hp_wmi_set_block,
 337 };
 338
 339 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 340 {
 341         int wireless = 0;
 342         int mask;
 343         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 344                              &wireless, sizeof(wireless),
 345                              sizeof(wireless));
 346         /* TBD: Pass error */
 347
 348         mask = 0x200 << (r * 8);
 349
 350         if (wireless & mask)
 351                 return false;
 352         else
 353                 return true;
 354 }
 355
 356 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 357 {
 358         int wireless = 0;
 359         int mask;
 360         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 361                              &wireless, sizeof(wireless),
 362                              sizeof(wireless));
 363         /* TBD: Pass error */
 364
 365         mask = 0x800 << (r * 8);
 366
 367         if (wireless & mask)
 368                 return false;
 369         else
 370                 return true;
 371 }
 372
 373 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 374 {
 375         int rfkill_id = (int)(long)data;
 376         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 377
 378         if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
 379                                    buffer, sizeof(buffer), 0))
 380                 return -EINVAL;
 381         return 0;
 382 }
 383
 384 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 385         .set_block = hp_wmi_rfkill2_set_block,
 386 };
 387
 388 static int hp_wmi_rfkill2_refresh(void)
 389 {
 390         int err, i;
 391         struct bios_rfkill2_state state;
 392
 393         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 394                                    0, sizeof(state));
 395         if (err)
 396                 return err;
 397
 398         for (i = 0; i < rfkill2_count; i++) {
 399                 int num = rfkill2[i].num;
 400                 struct bios_rfkill2_device_state *devstate;
 401                 devstate = &state.device[num];
 402
 403                 if (num >= state.count ||
 404                     devstate->rfkill_id != rfkill2[i].id) {
 405                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
 406                         continue;
 407                 }
 408
 409                 rfkill_set_states(rfkill2[i].rfkill,
 410                                   IS_SWBLOCKED(devstate->power),
 411                                   IS_HWBLOCKED(devstate->power));
 412         }
 413
 414         return 0;
 415 }
 416
 417 static int hp_wmi_post_code_state(void)
 418 {
 419         int state = 0;
 420         int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 0, &state,
 421                                        sizeof(state), sizeof(state));
 422         if (ret)
 423                 return -EINVAL;
 424         return state;
 425 }
 426
 427 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 428                             char *buf)
 429 {
 430         int value = hp_wmi_display_state();
 431         if (value < 0)
 432                 return -EINVAL;
 433         return sprintf(buf, "%d\n", value);
 434 }
 435
 436 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 437                             char *buf)
 438 {
 439         int value = hp_wmi_hddtemp_state();
 440         if (value < 0)
 441                 return -EINVAL;
 442         return sprintf(buf, "%d\n", value);
 443 }
 444
 445 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 446                         char *buf)
 447 {
 448         int value = hp_wmi_als_state();
 449         if (value < 0)
 450                 return -EINVAL;
 451         return sprintf(buf, "%d\n", value);
 452 }
 453
 454 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 455                          char *buf)
 456 {
 457         int value = hp_wmi_dock_state();
 458         if (value < 0)
 459                 return -EINVAL;
 460         return sprintf(buf, "%d\n", value);
 461 }
 462
 463 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 464                          char *buf)
 465 {
 466         int value = hp_wmi_tablet_state();
 467         if (value < 0)
 468                 return -EINVAL;
 469         return sprintf(buf, "%d\n", value);
 470 }
 471
 472 static ssize_t show_postcode(struct device *dev, struct device_attribute *attr,
 473                          char *buf)
 474 {
 475         /* Get the POST error code of previous boot failure. */
 476         int value = hp_wmi_post_code_state();
 477         if (value < 0)
 478                 return -EINVAL;
 479         return sprintf(buf, "0x%x\n", value);
 480 }
 481
 482 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 483                        const char *buf, size_t count)
 484 {
 485         u32 tmp = simple_strtoul(buf, NULL, 10);
 486         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
 487                                        sizeof(tmp), sizeof(tmp));
 488         if (ret)
 489                 return -EINVAL;
 490
 491         return count;
 492 }
 493
 494 static ssize_t set_postcode(struct device *dev, struct device_attribute *attr,
 495                        const char *buf, size_t count)
 496 {
 497         int ret;
 498         u32 tmp;
 499         long unsigned int tmp2;
 500
 501         ret = kstrtoul(buf, 10, &tmp2);
 502         if (ret || tmp2 != 1)
 503                 return -EINVAL;
 504
 505         /* Clear the POST error code. It is kept until until cleared. */
 506         tmp = (u32) tmp2;
 507         ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 1, &tmp,
 508                                        sizeof(tmp), sizeof(tmp));
 509         if (ret)
 510                 return -EINVAL;
 511
 512         return count;
 513 }
 514
 515 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 516 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 517 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 518 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 519 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 520 static DEVICE_ATTR(postcode, S_IRUGO | S_IWUSR, show_postcode, set_postcode);
 521
 522 static void hp_wmi_notify(u32 value, void *context)
 523 {
 524         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 525         union acpi_object *obj;
 526         u32 event_id, event_data;
 527         int key_code = 0, ret;
 528         u32 *location;
 529         acpi_status status;
 530
 531         status = wmi_get_event_data(value, &response);
 532         if (status != AE_OK) {
 533                 pr_info("bad event status 0x%x\n", status);
 534                 return;
 535         }
 536
 537         obj = (union acpi_object *)response.pointer;
 538
 539         if (!obj)
 540                 return;
 541         if (obj->type != ACPI_TYPE_BUFFER) {
 542                 pr_info("Unknown response received %d\n", obj->type);
 543                 kfree(obj);
 544                 return;
 545         }
 546
 547         /*
 548          * Depending on ACPI version the concatenation of id and event data
 549          * inside _WED function will result in a 8 or 16 byte buffer.
 550          */
 551         location = (u32 *)obj->buffer.pointer;
 552         if (obj->buffer.length == 8) {
 553                 event_id = *location;
 554                 event_data = *(location + 1);
 555         } else if (obj->buffer.length == 16) {
 556                 event_id = *location;
 557                 event_data = *(location + 2);
 558         } else {
 559                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
 560                 kfree(obj);
 561                 return;
 562         }
 563         kfree(obj);
 564
 565         switch (event_id) {
 566         case HPWMI_DOCK_EVENT:
 567                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 568                                     hp_wmi_dock_state());
 569                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 570                                     hp_wmi_tablet_state());
 571                 input_sync(hp_wmi_input_dev);
 572                 break;
 573         case HPWMI_PARK_HDD:
 574                 break;
 575         case HPWMI_SMART_ADAPTER:
 576                 break;
 577         case HPWMI_BEZEL_BUTTON:
 578                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 579                                            &key_code,
 580                                            sizeof(key_code),
 581                                            sizeof(key_code));
 582                 if (ret)
 583                         break;
 584
 585                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 586                                                 key_code, 1, true))
 587                         pr_info("Unknown key code - 0x%x\n", key_code);
 588                 break;
 589         case HPWMI_WIRELESS:
 590                 if (rfkill2_count) {
 591                         hp_wmi_rfkill2_refresh();
 592                         break;
 593                 }
 594
 595                 if (wifi_rfkill)
 596                         rfkill_set_states(wifi_rfkill,
 597                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 598                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 599                 if (bluetooth_rfkill)
 600                         rfkill_set_states(bluetooth_rfkill,
 601                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 602                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 603                 if (wwan_rfkill)
 604                         rfkill_set_states(wwan_rfkill,
 605                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 606                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 607                 if (gps_rfkill)
 608                         rfkill_set_states(gps_rfkill,
 609                                           hp_wmi_get_sw_state(HPWMI_GPS),
 610                                           hp_wmi_get_hw_state(HPWMI_GPS));
 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         default:
 634                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
 635                 break;
 636         }
 637 }
 638
 639 static int __init hp_wmi_input_setup(void)
 640 {
 641         acpi_status status;
 642         int err;
 643
 644         hp_wmi_input_dev = input_allocate_device();
 645         if (!hp_wmi_input_dev)
 646                 return -ENOMEM;
 647
 648         hp_wmi_input_dev->name = "HP WMI hotkeys";
 649         hp_wmi_input_dev->phys = "wmi/input0";
 650         hp_wmi_input_dev->id.bustype = BUS_HOST;
 651
 652         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 653         __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 654         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 655
 656         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 657         if (err)
 658                 goto err_free_dev;
 659
 660         /* Set initial hardware state */
 661         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
 662         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 663                             hp_wmi_tablet_state());
 664         input_sync(hp_wmi_input_dev);
 665
 666         if (hp_wmi_bios_2009_later() == 4)
 667                 hp_wmi_enable_hotkeys();
 668
 669         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 670         if (ACPI_FAILURE(status)) {
 671                 err = -EIO;
 672                 goto err_free_keymap;
 673         }
 674
 675         err = input_register_device(hp_wmi_input_dev);
 676         if (err)
 677                 goto err_uninstall_notifier;
 678
 679         return 0;
 680
 681  err_uninstall_notifier:
 682         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 683  err_free_keymap:
 684         sparse_keymap_free(hp_wmi_input_dev);
 685  err_free_dev:
 686         input_free_device(hp_wmi_input_dev);
 687         return err;
 688 }
 689
 690 static void hp_wmi_input_destroy(void)
 691 {
 692         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 693         sparse_keymap_free(hp_wmi_input_dev);
 694         input_unregister_device(hp_wmi_input_dev);
 695 }
 696
 697 static void cleanup_sysfs(struct platform_device *device)
 698 {
 699         device_remove_file(&device->dev, &dev_attr_display);
 700         device_remove_file(&device->dev, &dev_attr_hddtemp);
 701         device_remove_file(&device->dev, &dev_attr_als);
 702         device_remove_file(&device->dev, &dev_attr_dock);
 703         device_remove_file(&device->dev, &dev_attr_tablet);
 704         device_remove_file(&device->dev, &dev_attr_postcode);
 705 }
 706
 707 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
 708 {
 709         int err;
 710         int wireless = 0;
 711
 712         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
 713                                    sizeof(wireless), sizeof(wireless));
 714         if (err)
 715                 return err;
 716
 717         if (wireless & 0x1) {
 718                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 719                                            RFKILL_TYPE_WLAN,
 720                                            &hp_wmi_rfkill_ops,
 721                                            (void *) HPWMI_WIFI);
 722                 if (!wifi_rfkill)
 723                         return -ENOMEM;
 724                 rfkill_init_sw_state(wifi_rfkill,
 725                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 726                 rfkill_set_hw_state(wifi_rfkill,
 727                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 728                 err = rfkill_register(wifi_rfkill);
 729                 if (err)
 730                         goto register_wifi_error;
 731         }
 732
 733         if (wireless & 0x2) {
 734                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 735                                                 RFKILL_TYPE_BLUETOOTH,
 736                                                 &hp_wmi_rfkill_ops,
 737                                                 (void *) HPWMI_BLUETOOTH);
 738                 if (!bluetooth_rfkill) {
 739                         err = -ENOMEM;
 740                         goto register_wifi_error;
 741                 }
 742                 rfkill_init_sw_state(bluetooth_rfkill,
 743                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 744                 rfkill_set_hw_state(bluetooth_rfkill,
 745                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 746                 err = rfkill_register(bluetooth_rfkill);
 747                 if (err)
 748                         goto register_bluetooth_error;
 749         }
 750
 751         if (wireless & 0x4) {
 752                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 753                                            RFKILL_TYPE_WWAN,
 754                                            &hp_wmi_rfkill_ops,
 755                                            (void *) HPWMI_WWAN);
 756                 if (!wwan_rfkill) {
 757                         err = -ENOMEM;
 758                         goto register_bluetooth_error;
 759                 }
 760                 rfkill_init_sw_state(wwan_rfkill,
 761                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 762                 rfkill_set_hw_state(wwan_rfkill,
 763                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 764                 err = rfkill_register(wwan_rfkill);
 765                 if (err)
 766                         goto register_wwan_error;
 767         }
 768
 769         if (wireless & 0x8) {
 770                 gps_rfkill = rfkill_alloc("hp-gps", &device->dev,
 771                                                 RFKILL_TYPE_GPS,
 772                                                 &hp_wmi_rfkill_ops,
 773                                                 (void *) HPWMI_GPS);
 774                 if (!gps_rfkill) {
 775                         err = -ENOMEM;
 776                         goto register_wwan_error;
 777                 }
 778                 rfkill_init_sw_state(gps_rfkill,
 779                                      hp_wmi_get_sw_state(HPWMI_GPS));
 780                 rfkill_set_hw_state(gps_rfkill,
 781                                     hp_wmi_get_hw_state(HPWMI_GPS));
 782                 err = rfkill_register(gps_rfkill);
 783                 if (err)
 784                         goto register_gps_error;
 785         }
 786
 787         return 0;
 788 register_gps_error:
 789         rfkill_destroy(gps_rfkill);
 790         gps_rfkill = NULL;
 791         if (bluetooth_rfkill)
 792                 rfkill_unregister(bluetooth_rfkill);
 793 register_wwan_error:
 794         rfkill_destroy(wwan_rfkill);
 795         wwan_rfkill = NULL;
 796         if (gps_rfkill)
 797                 rfkill_unregister(gps_rfkill);
 798 register_bluetooth_error:
 799         rfkill_destroy(bluetooth_rfkill);
 800         bluetooth_rfkill = NULL;
 801         if (wifi_rfkill)
 802                 rfkill_unregister(wifi_rfkill);
 803 register_wifi_error:
 804         rfkill_destroy(wifi_rfkill);
 805         wifi_rfkill = NULL;
 806         return err;
 807 }
 808
 809 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
 810 {
 811         int err, i;
 812         struct bios_rfkill2_state state;
 813         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 814                                    0, sizeof(state));
 815         if (err)
 816                 return err;
 817
 818         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 819                 pr_warn("unable to parse 0x1b query output\n");
 820                 return -EINVAL;
 821         }
 822
 823         for (i = 0; i < state.count; i++) {
 824                 struct rfkill *rfkill;
 825                 enum rfkill_type type;
 826                 char *name;
 827                 switch (state.device[i].radio_type) {
 828                 case HPWMI_WIFI:
 829                         type = RFKILL_TYPE_WLAN;
 830                         name = "hp-wifi";
 831                         break;
 832                 case HPWMI_BLUETOOTH:
 833                         type = RFKILL_TYPE_BLUETOOTH;
 834                         name = "hp-bluetooth";
 835                         break;
 836                 case HPWMI_WWAN:
 837                         type = RFKILL_TYPE_WWAN;
 838                         name = "hp-wwan";
 839                         break;
 840                 case HPWMI_GPS:
 841                         type = RFKILL_TYPE_GPS;
 842                         name = "hp-gps";
 843                         break;
 844                 default:
 845                         pr_warn("unknown device type 0x%x\n",
 846                                 state.device[i].radio_type);
 847                         continue;
 848                 }
 849
 850                 if (!state.device[i].vendor_id) {
 851                         pr_warn("zero device %d while %d reported\n",
 852                                 i, state.count);
 853                         continue;
 854                 }
 855
 856                 rfkill = rfkill_alloc(name, &device->dev, type,
 857                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 858                 if (!rfkill) {
 859                         err = -ENOMEM;
 860                         goto fail;
 861                 }
 862
 863                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 864                 rfkill2[rfkill2_count].num = i;
 865                 rfkill2[rfkill2_count].rfkill = rfkill;
 866
 867                 rfkill_init_sw_state(rfkill,
 868                                      IS_SWBLOCKED(state.device[i].power));
 869                 rfkill_set_hw_state(rfkill,
 870                                     IS_HWBLOCKED(state.device[i].power));
 871
 872                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 873                         pr_info("device %s blocked by BIOS\n", name);
 874
 875                 err = rfkill_register(rfkill);
 876                 if (err) {
 877                         rfkill_destroy(rfkill);
 878                         goto fail;
 879                 }
 880
 881                 rfkill2_count++;
 882         }
 883
 884         return 0;
 885 fail:
 886         for (; rfkill2_count > 0; rfkill2_count--) {
 887                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 888                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 889         }
 890         return err;
 891 }
 892
 893 static int __init hp_wmi_bios_setup(struct platform_device *device)
 894 {
 895         int err;
 896
 897         /* clear detected rfkill devices */
 898         wifi_rfkill = NULL;
 899         bluetooth_rfkill = NULL;
 900         wwan_rfkill = NULL;
 901         gps_rfkill = NULL;
 902         rfkill2_count = 0;
 903
 904         if (hp_wmi_bios_2009_later() || hp_wmi_rfkill_setup(device))
 905                 hp_wmi_rfkill2_setup(device);
 906
 907         err = device_create_file(&device->dev, &dev_attr_display);
 908         if (err)
 909                 goto add_sysfs_error;
 910         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 911         if (err)
 912                 goto add_sysfs_error;
 913         err = device_create_file(&device->dev, &dev_attr_als);
 914         if (err)
 915                 goto add_sysfs_error;
 916         err = device_create_file(&device->dev, &dev_attr_dock);
 917         if (err)
 918                 goto add_sysfs_error;
 919         err = device_create_file(&device->dev, &dev_attr_tablet);
 920         if (err)
 921                 goto add_sysfs_error;
 922         err = device_create_file(&device->dev, &dev_attr_postcode);
 923         if (err)
 924                 goto add_sysfs_error;
 925         return 0;
 926
 927 add_sysfs_error:
 928         cleanup_sysfs(device);
 929         return err;
 930 }
 931
 932 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 933 {
 934         int i;
 935         cleanup_sysfs(device);
 936
 937         for (i = 0; i < rfkill2_count; i++) {
 938                 rfkill_unregister(rfkill2[i].rfkill);
 939                 rfkill_destroy(rfkill2[i].rfkill);
 940         }
 941
 942         if (wifi_rfkill) {
 943                 rfkill_unregister(wifi_rfkill);
 944                 rfkill_destroy(wifi_rfkill);
 945         }
 946         if (bluetooth_rfkill) {
 947                 rfkill_unregister(bluetooth_rfkill);
 948                 rfkill_destroy(bluetooth_rfkill);
 949         }
 950         if (wwan_rfkill) {
 951                 rfkill_unregister(wwan_rfkill);
 952                 rfkill_destroy(wwan_rfkill);
 953         }
 954         if (gps_rfkill) {
 955                 rfkill_unregister(gps_rfkill);
 956                 rfkill_destroy(gps_rfkill);
 957         }
 958
 959         return 0;
 960 }
 961
 962 static int hp_wmi_resume_handler(struct device *device)
 963 {
 964         /*
 965          * Hardware state may have changed while suspended, so trigger
 966          * input events for the current state. As this is a switch,
 967          * the input layer will only actually pass it on if the state
 968          * changed.
 969          */
 970         if (hp_wmi_input_dev) {
 971                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 972                                     hp_wmi_dock_state());
 973                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 974                                     hp_wmi_tablet_state());
 975                 input_sync(hp_wmi_input_dev);
 976         }
 977
 978         if (rfkill2_count)
 979                 hp_wmi_rfkill2_refresh();
 980
 981         if (wifi_rfkill)
 982                 rfkill_set_states(wifi_rfkill,
 983                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 984                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 985         if (bluetooth_rfkill)
 986                 rfkill_set_states(bluetooth_rfkill,
 987                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 988                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 989         if (wwan_rfkill)
 990                 rfkill_set_states(wwan_rfkill,
 991                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 992                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 993         if (gps_rfkill)
 994                 rfkill_set_states(gps_rfkill,
 995                                   hp_wmi_get_sw_state(HPWMI_GPS),
 996                                   hp_wmi_get_hw_state(HPWMI_GPS));
 997
 998         return 0;
 999 }
1000
1001 static const struct dev_pm_ops hp_wmi_pm_ops = {
1002         .resume  = hp_wmi_resume_handler,
1003         .restore  = hp_wmi_resume_handler,
1004 };
1005
1006 static struct platform_driver hp_wmi_driver = {
1007         .driver = {
1008                 .name = "hp-wmi",
1009                 .pm = &hp_wmi_pm_ops,
1010         },
1011         .remove = __exit_p(hp_wmi_bios_remove),
1012 };
1013
1014 static int __init hp_wmi_init(void)
1015 {
1016         int err;
1017         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
1018         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
1019
1020         if (!bios_capable && !event_capable)
1021                 return -ENODEV;
1022
1023         if (event_capable) {
1024                 err = hp_wmi_input_setup();
1025                 if (err)
1026                         return err;
1027         }
1028
1029         if (bios_capable) {
1030                 hp_wmi_platform_dev =
1031                         platform_device_register_simple("hp-wmi", -1, NULL, 0);
1032                 if (IS_ERR(hp_wmi_platform_dev)) {
1033                         err = PTR_ERR(hp_wmi_platform_dev);
1034                         goto err_destroy_input;
1035                 }
1036
1037                 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1038                 if (err)
1039                         goto err_unregister_device;
1040         }
1041
1042         return 0;
1043
1044 err_unregister_device:
1045         platform_device_unregister(hp_wmi_platform_dev);
1046 err_destroy_input:
1047         if (event_capable)
1048                 hp_wmi_input_destroy();
1049
1050         return err;
1051 }
1052 module_init(hp_wmi_init);
1053
1054 static void __exit hp_wmi_exit(void)
1055 {
1056         if (wmi_has_guid(HPWMI_EVENT_GUID))
1057                 hp_wmi_input_destroy();
1058
1059         if (hp_wmi_platform_dev) {
1060                 platform_device_unregister(hp_wmi_platform_dev);
1061                 platform_driver_unregister(&hp_wmi_driver);
1062         }
1063 }
1064 module_exit(hp_wmi_exit);