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