drivers/platform/x86/hp-wmi.c

   1 /*
   2  * HP WMI hotkeys
   3  *
   4  * Copyright (C) 2008 Red Hat <[email protected]>
   5  * Copyright (C) 2010, 2011 Anssi Hannula <[email protected]>
   6  *
   7  * Portions based on wistron_btns.c:
   8  * Copyright (C) 2005 Miloslav Trmac <[email protected]>
   9  * Copyright (C) 2005 Bernhard Rosenkraenzer <[email protected]>
  10  * Copyright (C) 2005 Dmitry Torokhov <[email protected]>
  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 <[email protected]>");
  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_FEATURE_QUERY 0xd
  58 #define HPWMI_WIRELESS2_QUERY 0x1b
  59 #define HPWMI_POSTCODEERROR_QUERY 0x2a
  60
  61 enum hp_wmi_radio {
  62         HPWMI_WIFI = 0,
  63         HPWMI_BLUETOOTH = 1,
  64         HPWMI_WWAN = 2,
  65         HPWMI_GPS = 3,
  66 };
  67
  68 enum hp_wmi_event_ids {
  69         HPWMI_DOCK_EVENT = 1,
  70         HPWMI_PARK_HDD = 2,
  71         HPWMI_SMART_ADAPTER = 3,
  72         HPWMI_BEZEL_BUTTON = 4,
  73         HPWMI_WIRELESS = 5,
  74         HPWMI_CPU_BATTERY_THROTTLE = 6,
  75         HPWMI_LOCK_SWITCH = 7,
  76         HPWMI_LID_SWITCH = 8,
  77         HPWMI_SCREEN_ROTATION = 9,
  78         HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
  79         HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
  80         HPWMI_PROXIMITY_SENSOR = 0x0C,
  81         HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
  82         HPWMI_PEAKSHIFT_PERIOD = 0x0F,
  83         HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
  84 };
  85
  86 struct bios_args {
  87         u32 signature;
  88         u32 command;
  89         u32 commandtype;
  90         u32 datasize;
  91         u32 data;
  92 };
  93
  94 struct bios_return {
  95         u32 sigpass;
  96         u32 return_code;
  97 };
  98
  99 enum hp_return_value {
 100         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
 101         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
 102         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
 103         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
 104 };
 105
 106 enum hp_wireless2_bits {
 107         HPWMI_POWER_STATE       = 0x01,
 108         HPWMI_POWER_SOFT        = 0x02,
 109         HPWMI_POWER_BIOS        = 0x04,
 110         HPWMI_POWER_HARD        = 0x08,
 111 };
 112
 113 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
 114                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
 115 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 116
 117 struct bios_rfkill2_device_state {
 118         u8 radio_type;
 119         u8 bus_type;
 120         u16 vendor_id;
 121         u16 product_id;
 122         u16 subsys_vendor_id;
 123         u16 subsys_product_id;
 124         u8 rfkill_id;
 125         u8 power;
 126         u8 unknown[4];
 127 };
 128
 129 /* 7 devices fit into the 128 byte buffer */
 130 #define HPWMI_MAX_RFKILL2_DEVICES       7
 131
 132 struct bios_rfkill2_state {
 133         u8 unknown[7];
 134         u8 count;
 135         u8 pad[8];
 136         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 137 };
 138
 139 static const struct key_entry hp_wmi_keymap[] = {
 140         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 141         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 142         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 143         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 144         { KE_KEY, 0x2142, { KEY_MEDIA } },
 145         { KE_KEY, 0x213b, { KEY_INFO } },
 146         { KE_KEY, 0x2169, { KEY_DIRECTION } },
 147         { KE_KEY, 0x231b, { KEY_HELP } },
 148         { KE_END, 0 }
 149 };
 150
 151 static struct input_dev *hp_wmi_input_dev;
 152 static struct platform_device *hp_wmi_platform_dev;
 153
 154 static struct rfkill *wifi_rfkill;
 155 static struct rfkill *bluetooth_rfkill;
 156 static struct rfkill *wwan_rfkill;
 157 static struct rfkill *gps_rfkill;
 158
 159 struct rfkill2_device {
 160         u8 id;
 161         int num;
 162         struct rfkill *rfkill;
 163 };
 164
 165 static int rfkill2_count;
 166 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 167
 168 /*
 169  * hp_wmi_perform_query
 170  *
 171  * query:       The commandtype -> What should be queried
 172  * write:       The command -> 0 read, 1 write, 3 ODM specific
 173  * buffer:      Buffer used as input and/or output
 174  * insize:      Size of input buffer
 175  * outsize:     Size of output buffer
 176  *
 177  * returns zero on success
 178  *         an HP WMI query specific error code (which is positive)
 179  *         -EINVAL if the query was not successful at all
 180  *         -EINVAL if the output buffer size exceeds buffersize
 181  *
 182  * Note: The buffersize must at least be the maximum of the input and output
 183  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
 184  *       and 128 byte output. The caller would do:
 185  *       buffer = kzalloc(128, GFP_KERNEL);
 186  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
 187  */
 188 static int hp_wmi_perform_query(int query, int write, void *buffer,
 189                                 int insize, int outsize)
 190 {
 191         struct bios_return *bios_return;
 192         int actual_outsize;
 193         union acpi_object *obj;
 194         struct bios_args args = {
 195                 .signature = 0x55434553,
 196                 .command = write ? 0x2 : 0x1,
 197                 .commandtype = query,
 198                 .datasize = insize,
 199                 .data = 0,
 200         };
 201         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 202         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 203         u32 rc;
 204
 205         if (WARN_ON(insize > sizeof(args.data)))
 206                 return -EINVAL;
 207         memcpy(&args.data, buffer, insize);
 208
 209         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
 210
 211         obj = output.pointer;
 212
 213         if (!obj)
 214                 return -EINVAL;
 215         else if (obj->type != ACPI_TYPE_BUFFER) {
 216                 kfree(obj);
 217                 return -EINVAL;
 218         }
 219
 220         bios_return = (struct bios_return *)obj->buffer.pointer;
 221         rc = bios_return->return_code;
 222
 223         if (rc) {
 224                 if (rc != HPWMI_RET_UNKNOWN_CMDTYPE)
 225                         pr_warn("query 0x%x returned error 0x%x\n", query, rc);
 226                 kfree(obj);
 227                 return rc;
 228         }
 229
 230         if (!outsize) {
 231                 /* ignore output data */
 232                 kfree(obj);
 233                 return 0;
 234         }
 235
 236         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 237         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 238         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 239         kfree(obj);
 240         return 0;
 241 }
 242
 243 static int hp_wmi_display_state(void)
 244 {
 245         int state = 0;
 246         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
 247                                        sizeof(state), sizeof(state));
 248         if (ret)
 249                 return -EINVAL;
 250         return state;
 251 }
 252
 253 static int hp_wmi_hddtemp_state(void)
 254 {
 255         int state = 0;
 256         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
 257                                        sizeof(state), sizeof(state));
 258         if (ret)
 259                 return -EINVAL;
 260         return state;
 261 }
 262
 263 static int hp_wmi_als_state(void)
 264 {
 265         int state = 0;
 266         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
 267                                        sizeof(state), sizeof(state));
 268         if (ret)
 269                 return -EINVAL;
 270         return state;
 271 }
 272
 273 static int hp_wmi_dock_state(void)
 274 {
 275         int state = 0;
 276         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 277                                        sizeof(state), sizeof(state));
 278
 279         if (ret)
 280                 return -EINVAL;
 281
 282         return state & 0x1;
 283 }
 284
 285 static int hp_wmi_tablet_state(void)
 286 {
 287         int state = 0;
 288         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 289                                        sizeof(state), sizeof(state));
 290         if (ret)
 291                 return ret;
 292
 293         return (state & 0x4) ? 1 : 0;
 294 }
 295
 296 static int hp_wmi_bios_2009_later(void)
 297 {
 298         int state = 0;
 299         int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, 0, &state,
 300                                        sizeof(state), sizeof(state));
 301         if (ret)
 302                 return ret;
 303
 304         return (state & 0x10) ? 1 : 0;
 305 }
 306
 307 static int hp_wmi_set_block(void *data, bool blocked)
 308 {
 309         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 310         int query = BIT(r + 8) | ((!blocked) << r);
 311         int ret;
 312
 313         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 314                                    &query, sizeof(query), 0);
 315         if (ret)
 316                 return -EINVAL;
 317         return 0;
 318 }
 319
 320 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 321         .set_block = hp_wmi_set_block,
 322 };
 323
 324 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 325 {
 326         int wireless = 0;
 327         int mask;
 328         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 329                              &wireless, sizeof(wireless),
 330                              sizeof(wireless));
 331         /* TBD: Pass error */
 332
 333         mask = 0x200 << (r * 8);
 334
 335         if (wireless & mask)
 336                 return false;
 337         else
 338                 return true;
 339 }
 340
 341 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 342 {
 343         int wireless = 0;
 344         int mask;
 345         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 346                              &wireless, sizeof(wireless),
 347                              sizeof(wireless));
 348         /* TBD: Pass error */
 349
 350         mask = 0x800 << (r * 8);
 351
 352         if (wireless & mask)
 353                 return false;
 354         else
 355                 return true;
 356 }
 357
 358 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 359 {
 360         int rfkill_id = (int)(long)data;
 361         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 362
 363         if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
 364                                    buffer, sizeof(buffer), 0))
 365                 return -EINVAL;
 366         return 0;
 367 }
 368
 369 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 370         .set_block = hp_wmi_rfkill2_set_block,
 371 };
 372
 373 static int hp_wmi_rfkill2_refresh(void)
 374 {
 375         int err, i;
 376         struct bios_rfkill2_state state;
 377
 378         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 379                                    0, sizeof(state));
 380         if (err)
 381                 return err;
 382
 383         for (i = 0; i < rfkill2_count; i++) {
 384                 int num = rfkill2[i].num;
 385                 struct bios_rfkill2_device_state *devstate;
 386                 devstate = &state.device[num];
 387
 388                 if (num >= state.count ||
 389                     devstate->rfkill_id != rfkill2[i].id) {
 390                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
 391                         continue;
 392                 }
 393
 394                 rfkill_set_states(rfkill2[i].rfkill,
 395                                   IS_SWBLOCKED(devstate->power),
 396                                   IS_HWBLOCKED(devstate->power));
 397         }
 398
 399         return 0;
 400 }
 401
 402 static int hp_wmi_post_code_state(void)
 403 {
 404         int state = 0;
 405         int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 0, &state,
 406                                        sizeof(state), sizeof(state));
 407         if (ret)
 408                 return -EINVAL;
 409         return state;
 410 }
 411
 412 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 413                             char *buf)
 414 {
 415         int value = hp_wmi_display_state();
 416         if (value < 0)
 417                 return -EINVAL;
 418         return sprintf(buf, "%d\n", value);
 419 }
 420
 421 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 422                             char *buf)
 423 {
 424         int value = hp_wmi_hddtemp_state();
 425         if (value < 0)
 426                 return -EINVAL;
 427         return sprintf(buf, "%d\n", value);
 428 }
 429
 430 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 431                         char *buf)
 432 {
 433         int value = hp_wmi_als_state();
 434         if (value < 0)
 435                 return -EINVAL;
 436         return sprintf(buf, "%d\n", value);
 437 }
 438
 439 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 440                          char *buf)
 441 {
 442         int value = hp_wmi_dock_state();
 443         if (value < 0)
 444                 return -EINVAL;
 445         return sprintf(buf, "%d\n", value);
 446 }
 447
 448 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 449                          char *buf)
 450 {
 451         int value = hp_wmi_tablet_state();
 452         if (value < 0)
 453                 return -EINVAL;
 454         return sprintf(buf, "%d\n", value);
 455 }
 456
 457 static ssize_t show_postcode(struct device *dev, struct device_attribute *attr,
 458                          char *buf)
 459 {
 460         /* Get the POST error code of previous boot failure. */
 461         int value = hp_wmi_post_code_state();
 462         if (value < 0)
 463                 return -EINVAL;
 464         return sprintf(buf, "0x%x\n", value);
 465 }
 466
 467 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 468                        const char *buf, size_t count)
 469 {
 470         u32 tmp = simple_strtoul(buf, NULL, 10);
 471         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
 472                                        sizeof(tmp), sizeof(tmp));
 473         if (ret)
 474                 return -EINVAL;
 475
 476         return count;
 477 }
 478
 479 static ssize_t set_postcode(struct device *dev, struct device_attribute *attr,
 480                        const char *buf, size_t count)
 481 {
 482         int ret;
 483         u32 tmp;
 484         long unsigned int tmp2;
 485
 486         ret = kstrtoul(buf, 10, &tmp2);
 487         if (ret || tmp2 != 1)
 488                 return -EINVAL;
 489
 490         /* Clear the POST error code. It is kept until until cleared. */
 491         tmp = (u32) tmp2;
 492         ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 1, &tmp,
 493                                        sizeof(tmp), sizeof(tmp));
 494         if (ret)
 495                 return -EINVAL;
 496
 497         return count;
 498 }
 499
 500 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 501 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 502 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 503 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 504 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 505 static DEVICE_ATTR(postcode, S_IRUGO | S_IWUSR, show_postcode, set_postcode);
 506
 507 static void hp_wmi_notify(u32 value, void *context)
 508 {
 509         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 510         union acpi_object *obj;
 511         u32 event_id, event_data;
 512         int key_code = 0, ret;
 513         u32 *location;
 514         acpi_status status;
 515
 516         status = wmi_get_event_data(value, &response);
 517         if (status != AE_OK) {
 518                 pr_info("bad event status 0x%x\n", status);
 519                 return;
 520         }
 521
 522         obj = (union acpi_object *)response.pointer;
 523
 524         if (!obj)
 525                 return;
 526         if (obj->type != ACPI_TYPE_BUFFER) {
 527                 pr_info("Unknown response received %d\n", obj->type);
 528                 kfree(obj);
 529                 return;
 530         }
 531
 532         /*
 533          * Depending on ACPI version the concatenation of id and event data
 534          * inside _WED function will result in a 8 or 16 byte buffer.
 535          */
 536         location = (u32 *)obj->buffer.pointer;
 537         if (obj->buffer.length == 8) {
 538                 event_id = *location;
 539                 event_data = *(location + 1);
 540         } else if (obj->buffer.length == 16) {
 541                 event_id = *location;
 542                 event_data = *(location + 2);
 543         } else {
 544                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
 545                 kfree(obj);
 546                 return;
 547         }
 548         kfree(obj);
 549
 550         switch (event_id) {
 551         case HPWMI_DOCK_EVENT:
 552                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 553                                     hp_wmi_dock_state());
 554                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 555                                     hp_wmi_tablet_state());
 556                 input_sync(hp_wmi_input_dev);
 557                 break;
 558         case HPWMI_PARK_HDD:
 559                 break;
 560         case HPWMI_SMART_ADAPTER:
 561                 break;
 562         case HPWMI_BEZEL_BUTTON:
 563                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 564                                            &key_code,
 565                                            sizeof(key_code),
 566                                            sizeof(key_code));
 567                 if (ret)
 568                         break;
 569
 570                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 571                                                 key_code, 1, true))
 572                         pr_info("Unknown key code - 0x%x\n", key_code);
 573                 break;
 574         case HPWMI_WIRELESS:
 575                 if (rfkill2_count) {
 576                         hp_wmi_rfkill2_refresh();
 577                         break;
 578                 }
 579
 580                 if (wifi_rfkill)
 581                         rfkill_set_states(wifi_rfkill,
 582                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 583                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 584                 if (bluetooth_rfkill)
 585                         rfkill_set_states(bluetooth_rfkill,
 586                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 587                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 588                 if (wwan_rfkill)
 589                         rfkill_set_states(wwan_rfkill,
 590                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 591                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 592                 if (gps_rfkill)
 593                         rfkill_set_states(gps_rfkill,
 594                                           hp_wmi_get_sw_state(HPWMI_GPS),
 595                                           hp_wmi_get_hw_state(HPWMI_GPS));
 596                 break;
 597         case HPWMI_CPU_BATTERY_THROTTLE:
 598                 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
 599                 break;
 600         case HPWMI_LOCK_SWITCH:
 601                 break;
 602         case HPWMI_LID_SWITCH:
 603                 break;
 604         case HPWMI_SCREEN_ROTATION:
 605                 break;
 606         case HPWMI_COOLSENSE_SYSTEM_MOBILE:
 607                 break;
 608         case HPWMI_COOLSENSE_SYSTEM_HOT:
 609                 break;
 610         case HPWMI_PROXIMITY_SENSOR:
 611                 break;
 612         case HPWMI_BACKLIT_KB_BRIGHTNESS:
 613                 break;
 614         case HPWMI_PEAKSHIFT_PERIOD:
 615                 break;
 616         case HPWMI_BATTERY_CHARGE_PERIOD:
 617                 break;
 618         default:
 619                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
 620                 break;
 621         }
 622 }
 623
 624 static int __init hp_wmi_input_setup(void)
 625 {
 626         acpi_status status;
 627         int err;
 628
 629         hp_wmi_input_dev = input_allocate_device();
 630         if (!hp_wmi_input_dev)
 631                 return -ENOMEM;
 632
 633         hp_wmi_input_dev->name = "HP WMI hotkeys";
 634         hp_wmi_input_dev->phys = "wmi/input0";
 635         hp_wmi_input_dev->id.bustype = BUS_HOST;
 636
 637         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 638         __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 639         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 640
 641         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 642         if (err)
 643                 goto err_free_dev;
 644
 645         /* Set initial hardware state */
 646         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
 647         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 648                             hp_wmi_tablet_state());
 649         input_sync(hp_wmi_input_dev);
 650
 651         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 652         if (ACPI_FAILURE(status)) {
 653                 err = -EIO;
 654                 goto err_free_keymap;
 655         }
 656
 657         err = input_register_device(hp_wmi_input_dev);
 658         if (err)
 659                 goto err_uninstall_notifier;
 660
 661         return 0;
 662
 663  err_uninstall_notifier:
 664         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 665  err_free_keymap:
 666         sparse_keymap_free(hp_wmi_input_dev);
 667  err_free_dev:
 668         input_free_device(hp_wmi_input_dev);
 669         return err;
 670 }
 671
 672 static void hp_wmi_input_destroy(void)
 673 {
 674         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 675         sparse_keymap_free(hp_wmi_input_dev);
 676         input_unregister_device(hp_wmi_input_dev);
 677 }
 678
 679 static void cleanup_sysfs(struct platform_device *device)
 680 {
 681         device_remove_file(&device->dev, &dev_attr_display);
 682         device_remove_file(&device->dev, &dev_attr_hddtemp);
 683         device_remove_file(&device->dev, &dev_attr_als);
 684         device_remove_file(&device->dev, &dev_attr_dock);
 685         device_remove_file(&device->dev, &dev_attr_tablet);
 686         device_remove_file(&device->dev, &dev_attr_postcode);
 687 }
 688
 689 static int hp_wmi_rfkill_setup(struct platform_device *device)
 690 {
 691         int err;
 692         int wireless = 0;
 693
 694         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
 695                                    sizeof(wireless), sizeof(wireless));
 696         if (err)
 697                 return err;
 698
 699         if (wireless & 0x1) {
 700                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 701                                            RFKILL_TYPE_WLAN,
 702                                            &hp_wmi_rfkill_ops,
 703                                            (void *) HPWMI_WIFI);
 704                 if (!wifi_rfkill)
 705                         return -ENOMEM;
 706                 rfkill_init_sw_state(wifi_rfkill,
 707                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 708                 rfkill_set_hw_state(wifi_rfkill,
 709                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 710                 err = rfkill_register(wifi_rfkill);
 711                 if (err)
 712                         goto register_wifi_error;
 713         }
 714
 715         if (wireless & 0x2) {
 716                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 717                                                 RFKILL_TYPE_BLUETOOTH,
 718                                                 &hp_wmi_rfkill_ops,
 719                                                 (void *) HPWMI_BLUETOOTH);
 720                 if (!bluetooth_rfkill) {
 721                         err = -ENOMEM;
 722                         goto register_wifi_error;
 723                 }
 724                 rfkill_init_sw_state(bluetooth_rfkill,
 725                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 726                 rfkill_set_hw_state(bluetooth_rfkill,
 727                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 728                 err = rfkill_register(bluetooth_rfkill);
 729                 if (err)
 730                         goto register_bluetooth_error;
 731         }
 732
 733         if (wireless & 0x4) {
 734                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 735                                            RFKILL_TYPE_WWAN,
 736                                            &hp_wmi_rfkill_ops,
 737                                            (void *) HPWMI_WWAN);
 738                 if (!wwan_rfkill) {
 739                         err = -ENOMEM;
 740                         goto register_bluetooth_error;
 741                 }
 742                 rfkill_init_sw_state(wwan_rfkill,
 743                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 744                 rfkill_set_hw_state(wwan_rfkill,
 745                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 746                 err = rfkill_register(wwan_rfkill);
 747                 if (err)
 748                         goto register_wwan_error;
 749         }
 750
 751         if (wireless & 0x8) {
 752                 gps_rfkill = rfkill_alloc("hp-gps", &device->dev,
 753                                                 RFKILL_TYPE_GPS,
 754                                                 &hp_wmi_rfkill_ops,
 755                                                 (void *) HPWMI_GPS);
 756                 if (!gps_rfkill) {
 757                         err = -ENOMEM;
 758                         goto register_wwan_error;
 759                 }
 760                 rfkill_init_sw_state(gps_rfkill,
 761                                      hp_wmi_get_sw_state(HPWMI_GPS));
 762                 rfkill_set_hw_state(gps_rfkill,
 763                                     hp_wmi_get_hw_state(HPWMI_GPS));
 764                 err = rfkill_register(gps_rfkill);
 765                 if (err)
 766                         goto register_gps_error;
 767         }
 768
 769         return 0;
 770 register_gps_error:
 771         rfkill_destroy(gps_rfkill);
 772         gps_rfkill = NULL;
 773         if (bluetooth_rfkill)
 774                 rfkill_unregister(bluetooth_rfkill);
 775 register_wwan_error:
 776         rfkill_destroy(wwan_rfkill);
 777         wwan_rfkill = NULL;
 778         if (gps_rfkill)
 779                 rfkill_unregister(gps_rfkill);
 780 register_bluetooth_error:
 781         rfkill_destroy(bluetooth_rfkill);
 782         bluetooth_rfkill = NULL;
 783         if (wifi_rfkill)
 784                 rfkill_unregister(wifi_rfkill);
 785 register_wifi_error:
 786         rfkill_destroy(wifi_rfkill);
 787         wifi_rfkill = NULL;
 788         return err;
 789 }
 790
 791 static int hp_wmi_rfkill2_setup(struct platform_device *device)
 792 {
 793         int err, i;
 794         struct bios_rfkill2_state state;
 795         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 796                                    0, sizeof(state));
 797         if (err)
 798                 return err;
 799
 800         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 801                 pr_warn("unable to parse 0x1b query output\n");
 802                 return -EINVAL;
 803         }
 804
 805         for (i = 0; i < state.count; i++) {
 806                 struct rfkill *rfkill;
 807                 enum rfkill_type type;
 808                 char *name;
 809                 switch (state.device[i].radio_type) {
 810                 case HPWMI_WIFI:
 811                         type = RFKILL_TYPE_WLAN;
 812                         name = "hp-wifi";
 813                         break;
 814                 case HPWMI_BLUETOOTH:
 815                         type = RFKILL_TYPE_BLUETOOTH;
 816                         name = "hp-bluetooth";
 817                         break;
 818                 case HPWMI_WWAN:
 819                         type = RFKILL_TYPE_WWAN;
 820                         name = "hp-wwan";
 821                         break;
 822                 case HPWMI_GPS:
 823                         type = RFKILL_TYPE_GPS;
 824                         name = "hp-gps";
 825                         break;
 826                 default:
 827                         pr_warn("unknown device type 0x%x\n",
 828                                 state.device[i].radio_type);
 829                         continue;
 830                 }
 831
 832                 if (!state.device[i].vendor_id) {
 833                         pr_warn("zero device %d while %d reported\n",
 834                                 i, state.count);
 835                         continue;
 836                 }
 837
 838                 rfkill = rfkill_alloc(name, &device->dev, type,
 839                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 840                 if (!rfkill) {
 841                         err = -ENOMEM;
 842                         goto fail;
 843                 }
 844
 845                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 846                 rfkill2[rfkill2_count].num = i;
 847                 rfkill2[rfkill2_count].rfkill = rfkill;
 848
 849                 rfkill_init_sw_state(rfkill,
 850                                      IS_SWBLOCKED(state.device[i].power));
 851                 rfkill_set_hw_state(rfkill,
 852                                     IS_HWBLOCKED(state.device[i].power));
 853
 854                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 855                         pr_info("device %s blocked by BIOS\n", name);
 856
 857                 err = rfkill_register(rfkill);
 858                 if (err) {
 859                         rfkill_destroy(rfkill);
 860                         goto fail;
 861                 }
 862
 863                 rfkill2_count++;
 864         }
 865
 866         return 0;
 867 fail:
 868         for (; rfkill2_count > 0; rfkill2_count--) {
 869                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 870                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 871         }
 872         return err;
 873 }
 874
 875 static int __init hp_wmi_bios_setup(struct platform_device *device)
 876 {
 877         int err;
 878
 879         /* clear detected rfkill devices */
 880         wifi_rfkill = NULL;
 881         bluetooth_rfkill = NULL;
 882         wwan_rfkill = NULL;
 883         gps_rfkill = NULL;
 884         rfkill2_count = 0;
 885
 886         if (hp_wmi_bios_2009_later() || hp_wmi_rfkill_setup(device))
 887                 hp_wmi_rfkill2_setup(device);
 888
 889         err = device_create_file(&device->dev, &dev_attr_display);
 890         if (err)
 891                 goto add_sysfs_error;
 892         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 893         if (err)
 894                 goto add_sysfs_error;
 895         err = device_create_file(&device->dev, &dev_attr_als);
 896         if (err)
 897                 goto add_sysfs_error;
 898         err = device_create_file(&device->dev, &dev_attr_dock);
 899         if (err)
 900                 goto add_sysfs_error;
 901         err = device_create_file(&device->dev, &dev_attr_tablet);
 902         if (err)
 903                 goto add_sysfs_error;
 904         err = device_create_file(&device->dev, &dev_attr_postcode);
 905         if (err)
 906                 goto add_sysfs_error;
 907         return 0;
 908
 909 add_sysfs_error:
 910         cleanup_sysfs(device);
 911         return err;
 912 }
 913
 914 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 915 {
 916         int i;
 917         cleanup_sysfs(device);
 918
 919         for (i = 0; i < rfkill2_count; i++) {
 920                 rfkill_unregister(rfkill2[i].rfkill);
 921                 rfkill_destroy(rfkill2[i].rfkill);
 922         }
 923
 924         if (wifi_rfkill) {
 925                 rfkill_unregister(wifi_rfkill);
 926                 rfkill_destroy(wifi_rfkill);
 927         }
 928         if (bluetooth_rfkill) {
 929                 rfkill_unregister(bluetooth_rfkill);
 930                 rfkill_destroy(bluetooth_rfkill);
 931         }
 932         if (wwan_rfkill) {
 933                 rfkill_unregister(wwan_rfkill);
 934                 rfkill_destroy(wwan_rfkill);
 935         }
 936         if (gps_rfkill) {
 937                 rfkill_unregister(gps_rfkill);
 938                 rfkill_destroy(gps_rfkill);
 939         }
 940
 941         return 0;
 942 }
 943
 944 static int hp_wmi_resume_handler(struct device *device)
 945 {
 946         /*
 947          * Hardware state may have changed while suspended, so trigger
 948          * input events for the current state. As this is a switch,
 949          * the input layer will only actually pass it on if the state
 950          * changed.
 951          */
 952         if (hp_wmi_input_dev) {
 953                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 954                                     hp_wmi_dock_state());
 955                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 956                                     hp_wmi_tablet_state());
 957                 input_sync(hp_wmi_input_dev);
 958         }
 959
 960         if (rfkill2_count)
 961                 hp_wmi_rfkill2_refresh();
 962
 963         if (wifi_rfkill)
 964                 rfkill_set_states(wifi_rfkill,
 965                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 966                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 967         if (bluetooth_rfkill)
 968                 rfkill_set_states(bluetooth_rfkill,
 969                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 970                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 971         if (wwan_rfkill)
 972                 rfkill_set_states(wwan_rfkill,
 973                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 974                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 975         if (gps_rfkill)
 976                 rfkill_set_states(gps_rfkill,
 977                                   hp_wmi_get_sw_state(HPWMI_GPS),
 978                                   hp_wmi_get_hw_state(HPWMI_GPS));
 979
 980         return 0;
 981 }
 982
 983 static const struct dev_pm_ops hp_wmi_pm_ops = {
 984         .resume  = hp_wmi_resume_handler,
 985         .restore  = hp_wmi_resume_handler,
 986 };
 987
 988 static struct platform_driver hp_wmi_driver = {
 989         .driver = {
 990                 .name = "hp-wmi",
 991                 .owner = THIS_MODULE,
 992                 .pm = &hp_wmi_pm_ops,
 993         },
 994         .remove = __exit_p(hp_wmi_bios_remove),
 995 };
 996
 997 static int __init hp_wmi_init(void)
 998 {
 999         int err;
1000         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
1001         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
1002
1003         if (!bios_capable && !event_capable)
1004                 return -ENODEV;
1005
1006         if (event_capable) {
1007                 err = hp_wmi_input_setup();
1008                 if (err)
1009                         return err;
1010         }
1011
1012         if (bios_capable) {
1013                 hp_wmi_platform_dev =
1014                         platform_device_register_simple("hp-wmi", -1, NULL, 0);
1015                 if (IS_ERR(hp_wmi_platform_dev)) {
1016                         err = PTR_ERR(hp_wmi_platform_dev);
1017                         goto err_destroy_input;
1018                 }
1019
1020                 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1021                 if (err)
1022                         goto err_unregister_device;
1023         }
1024
1025         return 0;
1026
1027 err_unregister_device:
1028         platform_device_unregister(hp_wmi_platform_dev);
1029 err_destroy_input:
1030         if (event_capable)
1031                 hp_wmi_input_destroy();
1032
1033         return err;
1034 }
1035 module_init(hp_wmi_init);
1036
1037 static void __exit hp_wmi_exit(void)
1038 {
1039         if (wmi_has_guid(HPWMI_EVENT_GUID))
1040                 hp_wmi_input_destroy();
1041
1042         if (hp_wmi_platform_dev) {
1043                 platform_device_unregister(hp_wmi_platform_dev);
1044                 platform_driver_unregister(&hp_wmi_driver);
1045         }
1046 }
1047 module_exit(hp_wmi_exit);