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