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