kernel/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_FEATURE_QUERY 0xb
  58 #define HPWMI_HOTKEY_QUERY 0xc
  59 #define HPWMI_FEATURE2_QUERY 0xd
  60 #define HPWMI_WIRELESS2_QUERY 0x1b
  61 #define HPWMI_POSTCODEERROR_QUERY 0x2a
  62
  63 enum hp_wmi_radio {
  64         HPWMI_WIFI = 0,
  65         HPWMI_BLUETOOTH = 1,
  66         HPWMI_WWAN = 2,
  67         HPWMI_GPS = 3,
  68 };
  69
  70 enum hp_wmi_event_ids {
  71         HPWMI_DOCK_EVENT = 1,
  72         HPWMI_PARK_HDD = 2,
  73         HPWMI_SMART_ADAPTER = 3,
  74         HPWMI_BEZEL_BUTTON = 4,
  75         HPWMI_WIRELESS = 5,
  76         HPWMI_CPU_BATTERY_THROTTLE = 6,
  77         HPWMI_LOCK_SWITCH = 7,
  78         HPWMI_LID_SWITCH = 8,
  79         HPWMI_SCREEN_ROTATION = 9,
  80         HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
  81         HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
  82         HPWMI_PROXIMITY_SENSOR = 0x0C,
  83         HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
  84         HPWMI_PEAKSHIFT_PERIOD = 0x0F,
  85         HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
  86 };
  87
  88 struct bios_args {
  89         u32 signature;
  90         u32 command;
  91         u32 commandtype;
  92         u32 datasize;
  93         u32 data;
  94 };
  95
  96 struct bios_return {
  97         u32 sigpass;
  98         u32 return_code;
  99 };
 100
 101 enum hp_return_value {
 102         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
 103         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
 104         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
 105         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
 106 };
 107
 108 enum hp_wireless2_bits {
 109         HPWMI_POWER_STATE       = 0x01,
 110         HPWMI_POWER_SOFT        = 0x02,
 111         HPWMI_POWER_BIOS        = 0x04,
 112         HPWMI_POWER_HARD        = 0x08,
 113 };
 114
 115 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
 116                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
 117 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 118
 119 struct bios_rfkill2_device_state {
 120         u8 radio_type;
 121         u8 bus_type;
 122         u16 vendor_id;
 123         u16 product_id;
 124         u16 subsys_vendor_id;
 125         u16 subsys_product_id;
 126         u8 rfkill_id;
 127         u8 power;
 128         u8 unknown[4];
 129 };
 130
 131 /* 7 devices fit into the 128 byte buffer */
 132 #define HPWMI_MAX_RFKILL2_DEVICES       7
 133
 134 struct bios_rfkill2_state {
 135         u8 unknown[7];
 136         u8 count;
 137         u8 pad[8];
 138         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 139 };
 140
 141 static const struct key_entry hp_wmi_keymap[] = {
 142         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 143         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 144         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 145         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 146         { KE_KEY, 0x2142, { KEY_MEDIA } },
 147         { KE_KEY, 0x213b, { KEY_INFO } },
 148         { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
 149         { KE_KEY, 0x216a, { KEY_SETUP } },
 150         { KE_KEY, 0x231b, { KEY_HELP } },
 151         { KE_END, 0 }
 152 };
 153
 154 static struct input_dev *hp_wmi_input_dev;
 155 static struct platform_device *hp_wmi_platform_dev;
 156
 157 static struct rfkill *wifi_rfkill;
 158 static struct rfkill *bluetooth_rfkill;
 159 static struct rfkill *wwan_rfkill;
 160 static struct rfkill *gps_rfkill;
 161
 162 struct rfkill2_device {
 163         u8 id;
 164         int num;
 165         struct rfkill *rfkill;
 166 };
 167
 168 static int rfkill2_count;
 169 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 170
 171 /*
 172  * hp_wmi_perform_query
 173  *
 174  * query:       The commandtype -> What should be queried
 175  * write:       The command -> 0 read, 1 write, 3 ODM specific
 176  * buffer:      Buffer used as input and/or output
 177  * insize:      Size of input buffer
 178  * outsize:     Size of output buffer
 179  *
 180  * returns zero on success
 181  *         an HP WMI query specific error code (which is positive)
 182  *         -EINVAL if the query was not successful at all
 183  *         -EINVAL if the output buffer size exceeds buffersize
 184  *
 185  * Note: The buffersize must at least be the maximum of the input and output
 186  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
 187  *       and 128 byte output. The caller would do:
 188  *       buffer = kzalloc(128, GFP_KERNEL);
 189  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
 190  */
 191 static int hp_wmi_perform_query(int query, int write, void *buffer,
 192                                 int insize, int outsize)
 193 {
 194         struct bios_return *bios_return;
 195         int actual_outsize;
 196         union acpi_object *obj;
 197         struct bios_args args = {
 198                 .signature = 0x55434553,
 199                 .command = write ? 0x2 : 0x1,
 200                 .commandtype = query,
 201                 .datasize = insize,
 202                 .data = 0,
 203         };
 204         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 205         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 206         u32 rc;
 207
 208         if (WARN_ON(insize > sizeof(args.data)))
 209                 return -EINVAL;
 210         memcpy(&args.data, buffer, insize);
 211
 212         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
 213
 214         obj = output.pointer;
 215
 216         if (!obj)
 217                 return -EINVAL;
 218         else if (obj->type != ACPI_TYPE_BUFFER) {
 219                 kfree(obj);
 220                 return -EINVAL;
 221         }
 222
 223         bios_return = (struct bios_return *)obj->buffer.pointer;
 224         rc = bios_return->return_code;
 225
 226         if (rc) {
 227                 if (rc != HPWMI_RET_UNKNOWN_CMDTYPE)
 228                         pr_warn("query 0x%x returned error 0x%x\n", query, rc);
 229                 kfree(obj);
 230                 return rc;
 231         }
 232
 233         if (!outsize) {
 234                 /* ignore output data */
 235                 kfree(obj);
 236                 return 0;
 237         }
 238
 239         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 240         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 241         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 242         kfree(obj);
 243         return 0;
 244 }
 245
 246 static int hp_wmi_display_state(void)
 247 {
 248         int state = 0;
 249         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
 250                                        sizeof(state), sizeof(state));
 251         if (ret)
 252                 return -EINVAL;
 253         return state;
 254 }
 255
 256 static int hp_wmi_hddtemp_state(void)
 257 {
 258         int state = 0;
 259         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
 260                                        sizeof(state), sizeof(state));
 261         if (ret)
 262                 return -EINVAL;
 263         return state;
 264 }
 265
 266 static int hp_wmi_als_state(void)
 267 {
 268         int state = 0;
 269         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
 270                                        sizeof(state), sizeof(state));
 271         if (ret)
 272                 return -EINVAL;
 273         return state;
 274 }
 275
 276 static int hp_wmi_dock_state(void)
 277 {
 278         int state = 0;
 279         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 280                                        sizeof(state), sizeof(state));
 281
 282         if (ret)
 283                 return -EINVAL;
 284
 285         return state & 0x1;
 286 }
 287
 288 static int hp_wmi_tablet_state(void)
 289 {
 290         int state = 0;
 291         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 292                                        sizeof(state), sizeof(state));
 293         if (ret)
 294                 return ret;
 295
 296         return (state & 0x4) ? 1 : 0;
 297 }
 298
 299 static int __init hp_wmi_bios_2008_later(void)
 300 {
 301         int state = 0;
 302         int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, 0, &state,
 303                                        sizeof(state), sizeof(state));
 304         if (!ret)
 305                 return 1;
 306
 307         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
 308 }
 309
 310 static int __init hp_wmi_bios_2009_later(void)
 311 {
 312         int state = 0;
 313         int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, 0, &state,
 314                                        sizeof(state), sizeof(state));
 315         if (!ret)
 316                 return 1;
 317
 318         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
 319 }
 320
 321 static int __init hp_wmi_enable_hotkeys(void)
 322 {
 323         int value = 0x6e;
 324         int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &value,
 325                                        sizeof(value), 0);
 326         if (ret)
 327                 return -EINVAL;
 328         return 0;
 329 }
 330
 331 static int hp_wmi_set_block(void *data, bool blocked)
 332 {
 333         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 334         int query = BIT(r + 8) | ((!blocked) << r);
 335         int ret;
 336
 337         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 338                                    &query, sizeof(query), 0);
 339         if (ret)
 340                 return -EINVAL;
 341         return 0;
 342 }
 343
 344 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 345         .set_block = hp_wmi_set_block,
 346 };
 347
 348 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 349 {
 350         int wireless = 0;
 351         int mask;
 352         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 353                              &wireless, sizeof(wireless),
 354                              sizeof(wireless));
 355         /* TBD: Pass error */
 356
 357         mask = 0x200 << (r * 8);
 358
 359         if (wireless & mask)
 360                 return false;
 361         else
 362                 return true;
 363 }
 364
 365 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 366 {
 367         int wireless = 0;
 368         int mask;
 369         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 370                              &wireless, sizeof(wireless),
 371                              sizeof(wireless));
 372         /* TBD: Pass error */
 373
 374         mask = 0x800 << (r * 8);
 375
 376         if (wireless & mask)
 377                 return false;
 378         else
 379                 return true;
 380 }
 381
 382 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 383 {
 384         int rfkill_id = (int)(long)data;
 385         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 386
 387         if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
 388                                    buffer, sizeof(buffer), 0))
 389                 return -EINVAL;
 390         return 0;
 391 }
 392
 393 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 394         .set_block = hp_wmi_rfkill2_set_block,
 395 };
 396
 397 static int hp_wmi_rfkill2_refresh(void)
 398 {
 399         int err, i;
 400         struct bios_rfkill2_state state;
 401
 402         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 403                                    0, sizeof(state));
 404         if (err)
 405                 return err;
 406
 407         for (i = 0; i < rfkill2_count; i++) {
 408                 int num = rfkill2[i].num;
 409                 struct bios_rfkill2_device_state *devstate;
 410                 devstate = &state.device[num];
 411
 412                 if (num >= state.count ||
 413                     devstate->rfkill_id != rfkill2[i].id) {
 414                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
 415                         continue;
 416                 }
 417
 418                 rfkill_set_states(rfkill2[i].rfkill,
 419                                   IS_SWBLOCKED(devstate->power),
 420                                   IS_HWBLOCKED(devstate->power));
 421         }
 422
 423         return 0;
 424 }
 425
 426 static int hp_wmi_post_code_state(void)
 427 {
 428         int state = 0;
 429         int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 0, &state,
 430                                        sizeof(state), sizeof(state));
 431         if (ret)
 432                 return -EINVAL;
 433         return state;
 434 }
 435
 436 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 437                             char *buf)
 438 {
 439         int value = hp_wmi_display_state();
 440         if (value < 0)
 441                 return -EINVAL;
 442         return sprintf(buf, "%d\n", value);
 443 }
 444
 445 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 446                             char *buf)
 447 {
 448         int value = hp_wmi_hddtemp_state();
 449         if (value < 0)
 450                 return -EINVAL;
 451         return sprintf(buf, "%d\n", value);
 452 }
 453
 454 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 455                         char *buf)
 456 {
 457         int value = hp_wmi_als_state();
 458         if (value < 0)
 459                 return -EINVAL;
 460         return sprintf(buf, "%d\n", value);
 461 }
 462
 463 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 464                          char *buf)
 465 {
 466         int value = hp_wmi_dock_state();
 467         if (value < 0)
 468                 return -EINVAL;
 469         return sprintf(buf, "%d\n", value);
 470 }
 471
 472 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 473                          char *buf)
 474 {
 475         int value = hp_wmi_tablet_state();
 476         if (value < 0)
 477                 return -EINVAL;
 478         return sprintf(buf, "%d\n", value);
 479 }
 480
 481 static ssize_t show_postcode(struct device *dev, struct device_attribute *attr,
 482                          char *buf)
 483 {
 484         /* Get the POST error code of previous boot failure. */
 485         int value = hp_wmi_post_code_state();
 486         if (value < 0)
 487                 return -EINVAL;
 488         return sprintf(buf, "0x%x\n", value);
 489 }
 490
 491 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 492                        const char *buf, size_t count)
 493 {
 494         u32 tmp = simple_strtoul(buf, NULL, 10);
 495         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
 496                                        sizeof(tmp), sizeof(tmp));
 497         if (ret)
 498                 return -EINVAL;
 499
 500         return count;
 501 }
 502
 503 static ssize_t set_postcode(struct device *dev, struct device_attribute *attr,
 504                        const char *buf, size_t count)
 505 {
 506         int ret;
 507         u32 tmp;
 508         long unsigned int tmp2;
 509
 510         ret = kstrtoul(buf, 10, &tmp2);
 511         if (ret || tmp2 != 1)
 512                 return -EINVAL;
 513
 514         /* Clear the POST error code. It is kept until until cleared. */
 515         tmp = (u32) tmp2;
 516         ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 1, &tmp,
 517                                        sizeof(tmp), sizeof(tmp));
 518         if (ret)
 519                 return -EINVAL;
 520
 521         return count;
 522 }
 523
 524 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 525 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 526 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 527 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 528 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 529 static DEVICE_ATTR(postcode, S_IRUGO | S_IWUSR, show_postcode, set_postcode);
 530
 531 static void hp_wmi_notify(u32 value, void *context)
 532 {
 533         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 534         union acpi_object *obj;
 535         u32 event_id, event_data;
 536         int key_code = 0, ret;
 537         u32 *location;
 538         acpi_status status;
 539
 540         status = wmi_get_event_data(value, &response);
 541         if (status != AE_OK) {
 542                 pr_info("bad event status 0x%x\n", status);
 543                 return;
 544         }
 545
 546         obj = (union acpi_object *)response.pointer;
 547
 548         if (!obj)
 549                 return;
 550         if (obj->type != ACPI_TYPE_BUFFER) {
 551                 pr_info("Unknown response received %d\n", obj->type);
 552                 kfree(obj);
 553                 return;
 554         }
 555
 556         /*
 557          * Depending on ACPI version the concatenation of id and event data
 558          * inside _WED function will result in a 8 or 16 byte buffer.
 559          */
 560         location = (u32 *)obj->buffer.pointer;
 561         if (obj->buffer.length == 8) {
 562                 event_id = *location;
 563                 event_data = *(location + 1);
 564         } else if (obj->buffer.length == 16) {
 565                 event_id = *location;
 566                 event_data = *(location + 2);
 567         } else {
 568                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
 569                 kfree(obj);
 570                 return;
 571         }
 572         kfree(obj);
 573
 574         switch (event_id) {
 575         case HPWMI_DOCK_EVENT:
 576                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 577                                     hp_wmi_dock_state());
 578                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 579                                     hp_wmi_tablet_state());
 580                 input_sync(hp_wmi_input_dev);
 581                 break;
 582         case HPWMI_PARK_HDD:
 583                 break;
 584         case HPWMI_SMART_ADAPTER:
 585                 break;
 586         case HPWMI_BEZEL_BUTTON:
 587                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 588                                            &key_code,
 589                                            sizeof(key_code),
 590                                            sizeof(key_code));
 591                 if (ret)
 592                         break;
 593
 594                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 595                                                 key_code, 1, true))
 596                         pr_info("Unknown key code - 0x%x\n", key_code);
 597                 break;
 598         case HPWMI_WIRELESS:
 599                 if (rfkill2_count) {
 600                         hp_wmi_rfkill2_refresh();
 601                         break;
 602                 }
 603
 604                 if (wifi_rfkill)
 605                         rfkill_set_states(wifi_rfkill,
 606                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 607                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 608                 if (bluetooth_rfkill)
 609                         rfkill_set_states(bluetooth_rfkill,
 610                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 611                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 612                 if (wwan_rfkill)
 613                         rfkill_set_states(wwan_rfkill,
 614                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 615                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 616                 if (gps_rfkill)
 617                         rfkill_set_states(gps_rfkill,
 618                                           hp_wmi_get_sw_state(HPWMI_GPS),
 619                                           hp_wmi_get_hw_state(HPWMI_GPS));
 620                 break;
 621         case HPWMI_CPU_BATTERY_THROTTLE:
 622                 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
 623                 break;
 624         case HPWMI_LOCK_SWITCH:
 625                 break;
 626         case HPWMI_LID_SWITCH:
 627                 break;
 628         case HPWMI_SCREEN_ROTATION:
 629                 break;
 630         case HPWMI_COOLSENSE_SYSTEM_MOBILE:
 631                 break;
 632         case HPWMI_COOLSENSE_SYSTEM_HOT:
 633                 break;
 634         case HPWMI_PROXIMITY_SENSOR:
 635                 break;
 636         case HPWMI_BACKLIT_KB_BRIGHTNESS:
 637                 break;
 638         case HPWMI_PEAKSHIFT_PERIOD:
 639                 break;
 640         case HPWMI_BATTERY_CHARGE_PERIOD:
 641                 break;
 642         default:
 643                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
 644                 break;
 645         }
 646 }
 647
 648 static int __init hp_wmi_input_setup(void)
 649 {
 650         acpi_status status;
 651         int err;
 652
 653         hp_wmi_input_dev = input_allocate_device();
 654         if (!hp_wmi_input_dev)
 655                 return -ENOMEM;
 656
 657         hp_wmi_input_dev->name = "HP WMI hotkeys";
 658         hp_wmi_input_dev->phys = "wmi/input0";
 659         hp_wmi_input_dev->id.bustype = BUS_HOST;
 660
 661         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 662         __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 663         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 664
 665         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 666         if (err)
 667                 goto err_free_dev;
 668
 669         /* Set initial hardware state */
 670         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
 671         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 672                             hp_wmi_tablet_state());
 673         input_sync(hp_wmi_input_dev);
 674
 675         if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
 676                 hp_wmi_enable_hotkeys();
 677
 678         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 679         if (ACPI_FAILURE(status)) {
 680                 err = -EIO;
 681                 goto err_free_keymap;
 682         }
 683
 684         err = input_register_device(hp_wmi_input_dev);
 685         if (err)
 686                 goto err_uninstall_notifier;
 687
 688         return 0;
 689
 690  err_uninstall_notifier:
 691         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 692  err_free_keymap:
 693         sparse_keymap_free(hp_wmi_input_dev);
 694  err_free_dev:
 695         input_free_device(hp_wmi_input_dev);
 696         return err;
 697 }
 698
 699 static void hp_wmi_input_destroy(void)
 700 {
 701         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 702         sparse_keymap_free(hp_wmi_input_dev);
 703         input_unregister_device(hp_wmi_input_dev);
 704 }
 705
 706 static void cleanup_sysfs(struct platform_device *device)
 707 {
 708         device_remove_file(&device->dev, &dev_attr_display);
 709         device_remove_file(&device->dev, &dev_attr_hddtemp);
 710         device_remove_file(&device->dev, &dev_attr_als);
 711         device_remove_file(&device->dev, &dev_attr_dock);
 712         device_remove_file(&device->dev, &dev_attr_tablet);
 713         device_remove_file(&device->dev, &dev_attr_postcode);
 714 }
 715
 716 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
 717 {
 718         int err;
 719         int wireless = 0;
 720
 721         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
 722                                    sizeof(wireless), sizeof(wireless));
 723         if (err)
 724                 return err;
 725
 726         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, &wireless,
 727                                    sizeof(wireless), 0);
 728         if (err)
 729                 return err;
 730
 731         if (wireless & 0x1) {
 732                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 733                                            RFKILL_TYPE_WLAN,
 734                                            &hp_wmi_rfkill_ops,
 735                                            (void *) HPWMI_WIFI);
 736                 if (!wifi_rfkill)
 737                         return -ENOMEM;
 738                 rfkill_init_sw_state(wifi_rfkill,
 739                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 740                 rfkill_set_hw_state(wifi_rfkill,
 741                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 742                 err = rfkill_register(wifi_rfkill);
 743                 if (err)
 744                         goto register_wifi_error;
 745         }
 746
 747         if (wireless & 0x2) {
 748                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 749                                                 RFKILL_TYPE_BLUETOOTH,
 750                                                 &hp_wmi_rfkill_ops,
 751                                                 (void *) HPWMI_BLUETOOTH);
 752                 if (!bluetooth_rfkill) {
 753                         err = -ENOMEM;
 754                         goto register_wifi_error;
 755                 }
 756                 rfkill_init_sw_state(bluetooth_rfkill,
 757                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 758                 rfkill_set_hw_state(bluetooth_rfkill,
 759                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 760                 err = rfkill_register(bluetooth_rfkill);
 761                 if (err)
 762                         goto register_bluetooth_error;
 763         }
 764
 765         if (wireless & 0x4) {
 766                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 767                                            RFKILL_TYPE_WWAN,
 768                                            &hp_wmi_rfkill_ops,
 769                                            (void *) HPWMI_WWAN);
 770                 if (!wwan_rfkill) {
 771                         err = -ENOMEM;
 772                         goto register_bluetooth_error;
 773                 }
 774                 rfkill_init_sw_state(wwan_rfkill,
 775                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 776                 rfkill_set_hw_state(wwan_rfkill,
 777                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 778                 err = rfkill_register(wwan_rfkill);
 779                 if (err)
 780                         goto register_wwan_error;
 781         }
 782
 783         if (wireless & 0x8) {
 784                 gps_rfkill = rfkill_alloc("hp-gps", &device->dev,
 785                                                 RFKILL_TYPE_GPS,
 786                                                 &hp_wmi_rfkill_ops,
 787                                                 (void *) HPWMI_GPS);
 788                 if (!gps_rfkill) {
 789                         err = -ENOMEM;
 790                         goto register_wwan_error;
 791                 }
 792                 rfkill_init_sw_state(gps_rfkill,
 793                                      hp_wmi_get_sw_state(HPWMI_GPS));
 794                 rfkill_set_hw_state(gps_rfkill,
 795                                     hp_wmi_get_hw_state(HPWMI_GPS));
 796                 err = rfkill_register(gps_rfkill);
 797                 if (err)
 798                         goto register_gps_error;
 799         }
 800
 801         return 0;
 802 register_gps_error:
 803         rfkill_destroy(gps_rfkill);
 804         gps_rfkill = NULL;
 805         if (bluetooth_rfkill)
 806                 rfkill_unregister(bluetooth_rfkill);
 807 register_wwan_error:
 808         rfkill_destroy(wwan_rfkill);
 809         wwan_rfkill = NULL;
 810         if (gps_rfkill)
 811                 rfkill_unregister(gps_rfkill);
 812 register_bluetooth_error:
 813         rfkill_destroy(bluetooth_rfkill);
 814         bluetooth_rfkill = NULL;
 815         if (wifi_rfkill)
 816                 rfkill_unregister(wifi_rfkill);
 817 register_wifi_error:
 818         rfkill_destroy(wifi_rfkill);
 819         wifi_rfkill = NULL;
 820         return err;
 821 }
 822
 823 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
 824 {
 825         int err, i;
 826         struct bios_rfkill2_state state;
 827         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 828                                    0, sizeof(state));
 829         if (err)
 830                 return err;
 831
 832         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 833                 pr_warn("unable to parse 0x1b query output\n");
 834                 return -EINVAL;
 835         }
 836
 837         for (i = 0; i < state.count; i++) {
 838                 struct rfkill *rfkill;
 839                 enum rfkill_type type;
 840                 char *name;
 841                 switch (state.device[i].radio_type) {
 842                 case HPWMI_WIFI:
 843                         type = RFKILL_TYPE_WLAN;
 844                         name = "hp-wifi";
 845                         break;
 846                 case HPWMI_BLUETOOTH:
 847                         type = RFKILL_TYPE_BLUETOOTH;
 848                         name = "hp-bluetooth";
 849                         break;
 850                 case HPWMI_WWAN:
 851                         type = RFKILL_TYPE_WWAN;
 852                         name = "hp-wwan";
 853                         break;
 854                 case HPWMI_GPS:
 855                         type = RFKILL_TYPE_GPS;
 856                         name = "hp-gps";
 857                         break;
 858                 default:
 859                         pr_warn("unknown device type 0x%x\n",
 860                                 state.device[i].radio_type);
 861                         continue;
 862                 }
 863
 864                 if (!state.device[i].vendor_id) {
 865                         pr_warn("zero device %d while %d reported\n",
 866                                 i, state.count);
 867                         continue;
 868                 }
 869
 870                 rfkill = rfkill_alloc(name, &device->dev, type,
 871                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 872                 if (!rfkill) {
 873                         err = -ENOMEM;
 874                         goto fail;
 875                 }
 876
 877                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 878                 rfkill2[rfkill2_count].num = i;
 879                 rfkill2[rfkill2_count].rfkill = rfkill;
 880
 881                 rfkill_init_sw_state(rfkill,
 882                                      IS_SWBLOCKED(state.device[i].power));
 883                 rfkill_set_hw_state(rfkill,
 884                                     IS_HWBLOCKED(state.device[i].power));
 885
 886                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 887                         pr_info("device %s blocked by BIOS\n", name);
 888
 889                 err = rfkill_register(rfkill);
 890                 if (err) {
 891                         rfkill_destroy(rfkill);
 892                         goto fail;
 893                 }
 894
 895                 rfkill2_count++;
 896         }
 897
 898         return 0;
 899 fail:
 900         for (; rfkill2_count > 0; rfkill2_count--) {
 901                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 902                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 903         }
 904         return err;
 905 }
 906
 907 static int __init hp_wmi_bios_setup(struct platform_device *device)
 908 {
 909         int err;
 910
 911         /* clear detected rfkill devices */
 912         wifi_rfkill = NULL;
 913         bluetooth_rfkill = NULL;
 914         wwan_rfkill = NULL;
 915         gps_rfkill = NULL;
 916         rfkill2_count = 0;
 917
 918         if (hp_wmi_rfkill_setup(device))
 919                 hp_wmi_rfkill2_setup(device);
 920
 921         err = device_create_file(&device->dev, &dev_attr_display);
 922         if (err)
 923                 goto add_sysfs_error;
 924         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 925         if (err)
 926                 goto add_sysfs_error;
 927         err = device_create_file(&device->dev, &dev_attr_als);
 928         if (err)
 929                 goto add_sysfs_error;
 930         err = device_create_file(&device->dev, &dev_attr_dock);
 931         if (err)
 932                 goto add_sysfs_error;
 933         err = device_create_file(&device->dev, &dev_attr_tablet);
 934         if (err)
 935                 goto add_sysfs_error;
 936         err = device_create_file(&device->dev, &dev_attr_postcode);
 937         if (err)
 938                 goto add_sysfs_error;
 939         return 0;
 940
 941 add_sysfs_error:
 942         cleanup_sysfs(device);
 943         return err;
 944 }
 945
 946 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 947 {
 948         int i;
 949         cleanup_sysfs(device);
 950
 951         for (i = 0; i < rfkill2_count; i++) {
 952                 rfkill_unregister(rfkill2[i].rfkill);
 953                 rfkill_destroy(rfkill2[i].rfkill);
 954         }
 955
 956         if (wifi_rfkill) {
 957                 rfkill_unregister(wifi_rfkill);
 958                 rfkill_destroy(wifi_rfkill);
 959         }
 960         if (bluetooth_rfkill) {
 961                 rfkill_unregister(bluetooth_rfkill);
 962                 rfkill_destroy(bluetooth_rfkill);
 963         }
 964         if (wwan_rfkill) {
 965                 rfkill_unregister(wwan_rfkill);
 966                 rfkill_destroy(wwan_rfkill);
 967         }
 968         if (gps_rfkill) {
 969                 rfkill_unregister(gps_rfkill);
 970                 rfkill_destroy(gps_rfkill);
 971         }
 972
 973         return 0;
 974 }
 975
 976 static int hp_wmi_resume_handler(struct device *device)
 977 {
 978         /*
 979          * Hardware state may have changed while suspended, so trigger
 980          * input events for the current state. As this is a switch,
 981          * the input layer will only actually pass it on if the state
 982          * changed.
 983          */
 984         if (hp_wmi_input_dev) {
 985                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 986                                     hp_wmi_dock_state());
 987                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 988                                     hp_wmi_tablet_state());
 989                 input_sync(hp_wmi_input_dev);
 990         }
 991
 992         if (rfkill2_count)
 993                 hp_wmi_rfkill2_refresh();
 994
 995         if (wifi_rfkill)
 996                 rfkill_set_states(wifi_rfkill,
 997                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 998                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 999         if (bluetooth_rfkill)
1000                 rfkill_set_states(bluetooth_rfkill,
1001                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
1002                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
1003         if (wwan_rfkill)
1004                 rfkill_set_states(wwan_rfkill,
1005                                   hp_wmi_get_sw_state(HPWMI_WWAN),
1006                                   hp_wmi_get_hw_state(HPWMI_WWAN));
1007         if (gps_rfkill)
1008                 rfkill_set_states(gps_rfkill,
1009                                   hp_wmi_get_sw_state(HPWMI_GPS),
1010                                   hp_wmi_get_hw_state(HPWMI_GPS));
1011
1012         return 0;
1013 }
1014
1015 static const struct dev_pm_ops hp_wmi_pm_ops = {
1016         .resume  = hp_wmi_resume_handler,
1017         .restore  = hp_wmi_resume_handler,
1018 };
1019
1020 static struct platform_driver hp_wmi_driver = {
1021         .driver = {
1022                 .name = "hp-wmi",
1023                 .pm = &hp_wmi_pm_ops,
1024         },
1025         .remove = __exit_p(hp_wmi_bios_remove),
1026 };
1027
1028 static int __init hp_wmi_init(void)
1029 {
1030         int err;
1031         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
1032         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
1033
1034         if (!bios_capable && !event_capable)
1035                 return -ENODEV;
1036
1037         if (event_capable) {
1038                 err = hp_wmi_input_setup();
1039                 if (err)
1040                         return err;
1041         }
1042
1043         if (bios_capable) {
1044                 hp_wmi_platform_dev =
1045                         platform_device_register_simple("hp-wmi", -1, NULL, 0);
1046                 if (IS_ERR(hp_wmi_platform_dev)) {
1047                         err = PTR_ERR(hp_wmi_platform_dev);
1048                         goto err_destroy_input;
1049                 }
1050
1051                 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1052                 if (err)
1053                         goto err_unregister_device;
1054         }
1055
1056         return 0;
1057
1058 err_unregister_device:
1059         platform_device_unregister(hp_wmi_platform_dev);
1060 err_destroy_input:
1061         if (event_capable)
1062                 hp_wmi_input_destroy();
1063
1064         return err;
1065 }
1066 module_init(hp_wmi_init);
1067
1068 static void __exit hp_wmi_exit(void)
1069 {
1070         if (wmi_has_guid(HPWMI_EVENT_GUID))
1071                 hp_wmi_input_destroy();
1072
1073         if (hp_wmi_platform_dev) {
1074                 platform_device_unregister(hp_wmi_platform_dev);
1075                 platform_driver_unregister(&hp_wmi_driver);
1076         }
1077 }
1078 module_exit(hp_wmi_exit);