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 static int enable_tablet_mode_sw = -1;
  49 module_param(enable_tablet_mode_sw, int, 0444);
  50 MODULE_PARM_DESC(enable_tablet_mode_sw, "Enable SW_TABLET_MODE reporting (-1=auto, 0=no, 1=yes)");
  51
  52 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  53 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
  54
  55 enum hp_wmi_radio {
  56         HPWMI_WIFI      = 0x0,
  57         HPWMI_BLUETOOTH = 0x1,
  58         HPWMI_WWAN      = 0x2,
  59         HPWMI_GPS       = 0x3,
  60 };
  61
  62 enum hp_wmi_event_ids {
  63         HPWMI_DOCK_EVENT                = 0x01,
  64         HPWMI_PARK_HDD                  = 0x02,
  65         HPWMI_SMART_ADAPTER             = 0x03,
  66         HPWMI_BEZEL_BUTTON              = 0x04,
  67         HPWMI_WIRELESS                  = 0x05,
  68         HPWMI_CPU_BATTERY_THROTTLE      = 0x06,
  69         HPWMI_LOCK_SWITCH               = 0x07,
  70         HPWMI_LID_SWITCH                = 0x08,
  71         HPWMI_SCREEN_ROTATION           = 0x09,
  72         HPWMI_COOLSENSE_SYSTEM_MOBILE   = 0x0A,
  73         HPWMI_COOLSENSE_SYSTEM_HOT      = 0x0B,
  74         HPWMI_PROXIMITY_SENSOR          = 0x0C,
  75         HPWMI_BACKLIT_KB_BRIGHTNESS     = 0x0D,
  76         HPWMI_PEAKSHIFT_PERIOD          = 0x0F,
  77         HPWMI_BATTERY_CHARGE_PERIOD     = 0x10,
  78         HPWMI_SANITIZATION_MODE         = 0x17,
  79 };
  80
  81 struct bios_args {
  82         u32 signature;
  83         u32 command;
  84         u32 commandtype;
  85         u32 datasize;
  86         u8 data[128];
  87 };
  88
  89 enum hp_wmi_commandtype {
  90         HPWMI_DISPLAY_QUERY             = 0x01,
  91         HPWMI_HDDTEMP_QUERY             = 0x02,
  92         HPWMI_ALS_QUERY                 = 0x03,
  93         HPWMI_HARDWARE_QUERY            = 0x04,
  94         HPWMI_WIRELESS_QUERY            = 0x05,
  95         HPWMI_BATTERY_QUERY             = 0x07,
  96         HPWMI_BIOS_QUERY                = 0x09,
  97         HPWMI_FEATURE_QUERY             = 0x0b,
  98         HPWMI_HOTKEY_QUERY              = 0x0c,
  99         HPWMI_FEATURE2_QUERY            = 0x0d,
 100         HPWMI_WIRELESS2_QUERY           = 0x1b,
 101         HPWMI_POSTCODEERROR_QUERY       = 0x2a,
 102 };
 103
 104 enum hp_wmi_command {
 105         HPWMI_READ      = 0x01,
 106         HPWMI_WRITE     = 0x02,
 107         HPWMI_ODM       = 0x03,
 108 };
 109
 110 enum hp_wmi_hardware_mask {
 111         HPWMI_DOCK_MASK         = 0x01,
 112         HPWMI_TABLET_MASK       = 0x04,
 113 };
 114
 115 struct bios_return {
 116         u32 sigpass;
 117         u32 return_code;
 118 };
 119
 120 enum hp_return_value {
 121         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
 122         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
 123         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
 124         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
 125 };
 126
 127 enum hp_wireless2_bits {
 128         HPWMI_POWER_STATE       = 0x01,
 129         HPWMI_POWER_SOFT        = 0x02,
 130         HPWMI_POWER_BIOS        = 0x04,
 131         HPWMI_POWER_HARD        = 0x08,
 132 };
 133
 134 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
 135                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
 136 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 137
 138 struct bios_rfkill2_device_state {
 139         u8 radio_type;
 140         u8 bus_type;
 141         u16 vendor_id;
 142         u16 product_id;
 143         u16 subsys_vendor_id;
 144         u16 subsys_product_id;
 145         u8 rfkill_id;
 146         u8 power;
 147         u8 unknown[4];
 148 };
 149
 150 /* 7 devices fit into the 128 byte buffer */
 151 #define HPWMI_MAX_RFKILL2_DEVICES       7
 152
 153 struct bios_rfkill2_state {
 154         u8 unknown[7];
 155         u8 count;
 156         u8 pad[8];
 157         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 158 };
 159
 160 static const struct key_entry hp_wmi_keymap[] = {
 161         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 162         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 163         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 164         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 165         { KE_KEY, 0x2142, { KEY_MEDIA } },
 166         { KE_KEY, 0x213b, { KEY_INFO } },
 167         { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
 168         { KE_KEY, 0x216a, { KEY_SETUP } },
 169         { KE_KEY, 0x231b, { KEY_HELP } },
 170         { KE_END, 0 }
 171 };
 172
 173 static struct input_dev *hp_wmi_input_dev;
 174 static struct platform_device *hp_wmi_platform_dev;
 175
 176 static struct rfkill *wifi_rfkill;
 177 static struct rfkill *bluetooth_rfkill;
 178 static struct rfkill *wwan_rfkill;
 179
 180 struct rfkill2_device {
 181         u8 id;
 182         int num;
 183         struct rfkill *rfkill;
 184 };
 185
 186 static int rfkill2_count;
 187 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 188
 189 /* map output size to the corresponding WMI method id */
 190 static inline int encode_outsize_for_pvsz(int outsize)
 191 {
 192         if (outsize > 4096)
 193                 return -EINVAL;
 194         if (outsize > 1024)
 195                 return 5;
 196         if (outsize > 128)
 197                 return 4;
 198         if (outsize > 4)
 199                 return 3;
 200         if (outsize > 0)
 201                 return 2;
 202         return 1;
 203 }
 204
 205 /*
 206  * hp_wmi_perform_query
 207  *
 208  * query:       The commandtype (enum hp_wmi_commandtype)
 209  * write:       The command (enum hp_wmi_command)
 210  * buffer:      Buffer used as input and/or output
 211  * insize:      Size of input buffer
 212  * outsize:     Size of output buffer
 213  *
 214  * returns zero on success
 215  *         an HP WMI query specific error code (which is positive)
 216  *         -EINVAL if the query was not successful at all
 217  *         -EINVAL if the output buffer size exceeds buffersize
 218  *
 219  * Note: The buffersize must at least be the maximum of the input and output
 220  *       size. E.g. Battery info query is defined to have 1 byte input
 221  *       and 128 byte output. The caller would do:
 222  *       buffer = kzalloc(128, GFP_KERNEL);
 223  *       ret = hp_wmi_perform_query(HPWMI_BATTERY_QUERY, HPWMI_READ, buffer, 1, 128)
 224  */
 225 static int hp_wmi_perform_query(int query, enum hp_wmi_command command,
 226                                 void *buffer, int insize, int outsize)
 227 {
 228         int mid;
 229         struct bios_return *bios_return;
 230         int actual_outsize;
 231         union acpi_object *obj;
 232         struct bios_args args = {
 233                 .signature = 0x55434553,
 234                 .command = command,
 235                 .commandtype = query,
 236                 .datasize = insize,
 237                 .data = { 0 },
 238         };
 239         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 240         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 241         int ret = 0;
 242
 243         mid = encode_outsize_for_pvsz(outsize);
 244         if (WARN_ON(mid < 0))
 245                 return mid;
 246
 247         if (WARN_ON(insize > sizeof(args.data)))
 248                 return -EINVAL;
 249         memcpy(&args.data[0], buffer, insize);
 250
 251         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, mid, &input, &output);
 252
 253         obj = output.pointer;
 254
 255         if (!obj)
 256                 return -EINVAL;
 257
 258         if (obj->type != ACPI_TYPE_BUFFER) {
 259                 ret = -EINVAL;
 260                 goto out_free;
 261         }
 262
 263         bios_return = (struct bios_return *)obj->buffer.pointer;
 264         ret = bios_return->return_code;
 265
 266         if (ret) {
 267                 if (ret != HPWMI_RET_UNKNOWN_CMDTYPE)
 268                         pr_warn("query 0x%x returned error 0x%x\n", query, ret);
 269                 goto out_free;
 270         }
 271
 272         /* Ignore output data of zero size */
 273         if (!outsize)
 274                 goto out_free;
 275
 276         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 277         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 278         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 279
 280 out_free:
 281         kfree(obj);
 282         return ret;
 283 }
 284
 285 static int hp_wmi_read_int(int query)
 286 {
 287         int val = 0, ret;
 288
 289         ret = hp_wmi_perform_query(query, HPWMI_READ, &val,
 290                                    sizeof(val), sizeof(val));
 291
 292         if (ret)
 293                 return ret < 0 ? ret : -EINVAL;
 294
 295         return val;
 296 }
 297
 298 static int hp_wmi_hw_state(int mask)
 299 {
 300         int state = hp_wmi_read_int(HPWMI_HARDWARE_QUERY);
 301
 302         if (state < 0)
 303                 return state;
 304
 305         return !!(state & mask);
 306 }
 307
 308 static int __init hp_wmi_bios_2008_later(void)
 309 {
 310         int state = 0;
 311         int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, HPWMI_READ, &state,
 312                                        sizeof(state), sizeof(state));
 313         if (!ret)
 314                 return 1;
 315
 316         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
 317 }
 318
 319 static int __init hp_wmi_bios_2009_later(void)
 320 {
 321         u8 state[128];
 322         int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, HPWMI_READ, &state,
 323                                        sizeof(state), sizeof(state));
 324         if (!ret)
 325                 return 1;
 326
 327         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
 328 }
 329
 330 static int __init hp_wmi_enable_hotkeys(void)
 331 {
 332         int value = 0x6e;
 333         int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, HPWMI_WRITE, &value,
 334                                        sizeof(value), 0);
 335
 336         return ret <= 0 ? ret : -EINVAL;
 337 }
 338
 339 static int hp_wmi_set_block(void *data, bool blocked)
 340 {
 341         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 342         int query = BIT(r + 8) | ((!blocked) << r);
 343         int ret;
 344
 345         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE,
 346                                    &query, sizeof(query), 0);
 347
 348         return ret <= 0 ? ret : -EINVAL;
 349 }
 350
 351 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 352         .set_block = hp_wmi_set_block,
 353 };
 354
 355 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 356 {
 357         int mask = 0x200 << (r * 8);
 358
 359         int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 360
 361         /* TBD: Pass error */
 362         WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
 363
 364         return !(wireless & mask);
 365 }
 366
 367 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 368 {
 369         int mask = 0x800 << (r * 8);
 370
 371         int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 372
 373         /* TBD: Pass error */
 374         WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
 375
 376         return !(wireless & mask);
 377 }
 378
 379 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 380 {
 381         int rfkill_id = (int)(long)data;
 382         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 383         int ret;
 384
 385         ret = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_WRITE,
 386                                    buffer, sizeof(buffer), 0);
 387
 388         return ret <= 0 ? ret : -EINVAL;
 389 }
 390
 391 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 392         .set_block = hp_wmi_rfkill2_set_block,
 393 };
 394
 395 static int hp_wmi_rfkill2_refresh(void)
 396 {
 397         struct bios_rfkill2_state state;
 398         int err, i;
 399
 400         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
 401                                    sizeof(state), sizeof(state));
 402         if (err)
 403                 return err;
 404
 405         for (i = 0; i < rfkill2_count; i++) {
 406                 int num = rfkill2[i].num;
 407                 struct bios_rfkill2_device_state *devstate;
 408                 devstate = &state.device[num];
 409
 410                 if (num >= state.count ||
 411                     devstate->rfkill_id != rfkill2[i].id) {
 412                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
 413                         continue;
 414                 }
 415
 416                 rfkill_set_states(rfkill2[i].rfkill,
 417                                   IS_SWBLOCKED(devstate->power),
 418                                   IS_HWBLOCKED(devstate->power));
 419         }
 420
 421         return 0;
 422 }
 423
 424 static ssize_t display_show(struct device *dev, struct device_attribute *attr,
 425                             char *buf)
 426 {
 427         int value = hp_wmi_read_int(HPWMI_DISPLAY_QUERY);
 428         if (value < 0)
 429                 return value;
 430         return sprintf(buf, "%d\n", value);
 431 }
 432
 433 static ssize_t hddtemp_show(struct device *dev, struct device_attribute *attr,
 434                             char *buf)
 435 {
 436         int value = hp_wmi_read_int(HPWMI_HDDTEMP_QUERY);
 437         if (value < 0)
 438                 return value;
 439         return sprintf(buf, "%d\n", value);
 440 }
 441
 442 static ssize_t als_show(struct device *dev, struct device_attribute *attr,
 443                         char *buf)
 444 {
 445         int value = hp_wmi_read_int(HPWMI_ALS_QUERY);
 446         if (value < 0)
 447                 return value;
 448         return sprintf(buf, "%d\n", value);
 449 }
 450
 451 static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
 452                          char *buf)
 453 {
 454         int value = hp_wmi_hw_state(HPWMI_DOCK_MASK);
 455         if (value < 0)
 456                 return value;
 457         return sprintf(buf, "%d\n", value);
 458 }
 459
 460 static ssize_t tablet_show(struct device *dev, struct device_attribute *attr,
 461                            char *buf)
 462 {
 463         int value = hp_wmi_hw_state(HPWMI_TABLET_MASK);
 464         if (value < 0)
 465                 return value;
 466         return sprintf(buf, "%d\n", value);
 467 }
 468
 469 static ssize_t postcode_show(struct device *dev, struct device_attribute *attr,
 470                              char *buf)
 471 {
 472         /* Get the POST error code of previous boot failure. */
 473         int value = hp_wmi_read_int(HPWMI_POSTCODEERROR_QUERY);
 474         if (value < 0)
 475                 return value;
 476         return sprintf(buf, "0x%x\n", value);
 477 }
 478
 479 static ssize_t als_store(struct device *dev, struct device_attribute *attr,
 480                          const char *buf, size_t count)
 481 {
 482         u32 tmp;
 483         int ret;
 484
 485         ret = kstrtou32(buf, 10, &tmp);
 486         if (ret)
 487                 return ret;
 488
 489         ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp,
 490                                        sizeof(tmp), sizeof(tmp));
 491         if (ret)
 492                 return ret < 0 ? ret : -EINVAL;
 493
 494         return count;
 495 }
 496
 497 static ssize_t postcode_store(struct device *dev, struct device_attribute *attr,
 498                               const char *buf, size_t count)
 499 {
 500         long unsigned int tmp2;
 501         int ret;
 502         u32 tmp;
 503
 504         ret = kstrtoul(buf, 10, &tmp2);
 505         if (!ret && tmp2 != 1)
 506                 ret = -EINVAL;
 507         if (ret)
 508                 goto out;
 509
 510         /* Clear the POST error code. It is kept until until cleared. */
 511         tmp = (u32) tmp2;
 512         ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp,
 513                                        sizeof(tmp), sizeof(tmp));
 514
 515 out:
 516         if (ret)
 517                 return ret < 0 ? ret : -EINVAL;
 518
 519         return count;
 520 }
 521
 522 static DEVICE_ATTR_RO(display);
 523 static DEVICE_ATTR_RO(hddtemp);
 524 static DEVICE_ATTR_RW(als);
 525 static DEVICE_ATTR_RO(dock);
 526 static DEVICE_ATTR_RO(tablet);
 527 static DEVICE_ATTR_RW(postcode);
 528
 529 static void hp_wmi_notify(u32 value, void *context)
 530 {
 531         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 532         u32 event_id, event_data;
 533         union acpi_object *obj;
 534         acpi_status status;
 535         u32 *location;
 536         int key_code;
 537
 538         status = wmi_get_event_data(value, &response);
 539         if (status != AE_OK) {
 540                 pr_info("bad event status 0x%x\n", status);
 541                 return;
 542         }
 543
 544         obj = (union acpi_object *)response.pointer;
 545
 546         if (!obj)
 547                 return;
 548         if (obj->type != ACPI_TYPE_BUFFER) {
 549                 pr_info("Unknown response received %d\n", obj->type);
 550                 kfree(obj);
 551                 return;
 552         }
 553
 554         /*
 555          * Depending on ACPI version the concatenation of id and event data
 556          * inside _WED function will result in a 8 or 16 byte buffer.
 557          */
 558         location = (u32 *)obj->buffer.pointer;
 559         if (obj->buffer.length == 8) {
 560                 event_id = *location;
 561                 event_data = *(location + 1);
 562         } else if (obj->buffer.length == 16) {
 563                 event_id = *location;
 564                 event_data = *(location + 2);
 565         } else {
 566                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
 567                 kfree(obj);
 568                 return;
 569         }
 570         kfree(obj);
 571
 572         switch (event_id) {
 573         case HPWMI_DOCK_EVENT:
 574                 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
 575                         input_report_switch(hp_wmi_input_dev, SW_DOCK,
 576                                             hp_wmi_hw_state(HPWMI_DOCK_MASK));
 577                 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
 578                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 579                                             hp_wmi_hw_state(HPWMI_TABLET_MASK));
 580                 input_sync(hp_wmi_input_dev);
 581                 break;
 582         case HPWMI_PARK_HDD:
 583                 break;
 584         case HPWMI_SMART_ADAPTER:
 585                 break;
 586         case HPWMI_BEZEL_BUTTON:
 587                 key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY);
 588                 if (key_code < 0)
 589                         break;
 590
 591                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 592                                                 key_code, 1, true))
 593                         pr_info("Unknown key code - 0x%x\n", key_code);
 594                 break;
 595         case HPWMI_WIRELESS:
 596                 if (rfkill2_count) {
 597                         hp_wmi_rfkill2_refresh();
 598                         break;
 599                 }
 600
 601                 if (wifi_rfkill)
 602                         rfkill_set_states(wifi_rfkill,
 603                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 604                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 605                 if (bluetooth_rfkill)
 606                         rfkill_set_states(bluetooth_rfkill,
 607                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 608                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 609                 if (wwan_rfkill)
 610                         rfkill_set_states(wwan_rfkill,
 611                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 612                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 613                 break;
 614         case HPWMI_CPU_BATTERY_THROTTLE:
 615                 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
 616                 break;
 617         case HPWMI_LOCK_SWITCH:
 618                 break;
 619         case HPWMI_LID_SWITCH:
 620                 break;
 621         case HPWMI_SCREEN_ROTATION:
 622                 break;
 623         case HPWMI_COOLSENSE_SYSTEM_MOBILE:
 624                 break;
 625         case HPWMI_COOLSENSE_SYSTEM_HOT:
 626                 break;
 627         case HPWMI_PROXIMITY_SENSOR:
 628                 break;
 629         case HPWMI_BACKLIT_KB_BRIGHTNESS:
 630                 break;
 631         case HPWMI_PEAKSHIFT_PERIOD:
 632                 break;
 633         case HPWMI_BATTERY_CHARGE_PERIOD:
 634                 break;
 635         case HPWMI_SANITIZATION_MODE:
 636                 break;
 637         default:
 638                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
 639                 break;
 640         }
 641 }
 642
 643 static int __init hp_wmi_input_setup(void)
 644 {
 645         acpi_status status;
 646         int err, val;
 647
 648         hp_wmi_input_dev = input_allocate_device();
 649         if (!hp_wmi_input_dev)
 650                 return -ENOMEM;
 651
 652         hp_wmi_input_dev->name = "HP WMI hotkeys";
 653         hp_wmi_input_dev->phys = "wmi/input0";
 654         hp_wmi_input_dev->id.bustype = BUS_HOST;
 655
 656         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 657
 658         /* Dock */
 659         val = hp_wmi_hw_state(HPWMI_DOCK_MASK);
 660         if (!(val < 0)) {
 661                 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 662                 input_report_switch(hp_wmi_input_dev, SW_DOCK, val);
 663         }
 664
 665         /* Tablet mode */
 666         if (enable_tablet_mode_sw > 0) {
 667                 val = hp_wmi_hw_state(HPWMI_TABLET_MASK);
 668                 if (val >= 0) {
 669                         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 670                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val);
 671                 }
 672         }
 673
 674         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 675         if (err)
 676                 goto err_free_dev;
 677
 678         /* Set initial hardware state */
 679         input_sync(hp_wmi_input_dev);
 680
 681         if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
 682                 hp_wmi_enable_hotkeys();
 683
 684         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 685         if (ACPI_FAILURE(status)) {
 686                 err = -EIO;
 687                 goto err_free_dev;
 688         }
 689
 690         err = input_register_device(hp_wmi_input_dev);
 691         if (err)
 692                 goto err_uninstall_notifier;
 693
 694         return 0;
 695
 696  err_uninstall_notifier:
 697         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 698  err_free_dev:
 699         input_free_device(hp_wmi_input_dev);
 700         return err;
 701 }
 702
 703 static void hp_wmi_input_destroy(void)
 704 {
 705         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 706         input_unregister_device(hp_wmi_input_dev);
 707 }
 708
 709 static void cleanup_sysfs(struct platform_device *device)
 710 {
 711         device_remove_file(&device->dev, &dev_attr_display);
 712         device_remove_file(&device->dev, &dev_attr_hddtemp);
 713         device_remove_file(&device->dev, &dev_attr_als);
 714         device_remove_file(&device->dev, &dev_attr_dock);
 715         device_remove_file(&device->dev, &dev_attr_tablet);
 716         device_remove_file(&device->dev, &dev_attr_postcode);
 717 }
 718
 719 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
 720 {
 721         int err, wireless;
 722
 723         wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
 724         if (wireless < 0)
 725                 return wireless;
 726
 727         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless,
 728                                    sizeof(wireless), 0);
 729         if (err)
 730                 return err;
 731
 732         if (wireless & 0x1) {
 733                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 734                                            RFKILL_TYPE_WLAN,
 735                                            &hp_wmi_rfkill_ops,
 736                                            (void *) HPWMI_WIFI);
 737                 if (!wifi_rfkill)
 738                         return -ENOMEM;
 739                 rfkill_init_sw_state(wifi_rfkill,
 740                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 741                 rfkill_set_hw_state(wifi_rfkill,
 742                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 743                 err = rfkill_register(wifi_rfkill);
 744                 if (err)
 745                         goto register_wifi_error;
 746         }
 747
 748         if (wireless & 0x2) {
 749                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 750                                                 RFKILL_TYPE_BLUETOOTH,
 751                                                 &hp_wmi_rfkill_ops,
 752                                                 (void *) HPWMI_BLUETOOTH);
 753                 if (!bluetooth_rfkill) {
 754                         err = -ENOMEM;
 755                         goto register_bluetooth_error;
 756                 }
 757                 rfkill_init_sw_state(bluetooth_rfkill,
 758                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 759                 rfkill_set_hw_state(bluetooth_rfkill,
 760                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 761                 err = rfkill_register(bluetooth_rfkill);
 762                 if (err)
 763                         goto register_bluetooth_error;
 764         }
 765
 766         if (wireless & 0x4) {
 767                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 768                                            RFKILL_TYPE_WWAN,
 769                                            &hp_wmi_rfkill_ops,
 770                                            (void *) HPWMI_WWAN);
 771                 if (!wwan_rfkill) {
 772                         err = -ENOMEM;
 773                         goto register_wwan_error;
 774                 }
 775                 rfkill_init_sw_state(wwan_rfkill,
 776                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 777                 rfkill_set_hw_state(wwan_rfkill,
 778                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 779                 err = rfkill_register(wwan_rfkill);
 780                 if (err)
 781                         goto register_wwan_error;
 782         }
 783
 784         return 0;
 785
 786 register_wwan_error:
 787         rfkill_destroy(wwan_rfkill);
 788         wwan_rfkill = NULL;
 789         if (bluetooth_rfkill)
 790                 rfkill_unregister(bluetooth_rfkill);
 791 register_bluetooth_error:
 792         rfkill_destroy(bluetooth_rfkill);
 793         bluetooth_rfkill = NULL;
 794         if (wifi_rfkill)
 795                 rfkill_unregister(wifi_rfkill);
 796 register_wifi_error:
 797         rfkill_destroy(wifi_rfkill);
 798         wifi_rfkill = NULL;
 799         return err;
 800 }
 801
 802 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
 803 {
 804         struct bios_rfkill2_state state;
 805         int err, i;
 806
 807         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
 808                                    sizeof(state), sizeof(state));
 809         if (err)
 810                 return err < 0 ? err : -EINVAL;
 811
 812         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 813                 pr_warn("unable to parse 0x1b query output\n");
 814                 return -EINVAL;
 815         }
 816
 817         for (i = 0; i < state.count; i++) {
 818                 struct rfkill *rfkill;
 819                 enum rfkill_type type;
 820                 char *name;
 821                 switch (state.device[i].radio_type) {
 822                 case HPWMI_WIFI:
 823                         type = RFKILL_TYPE_WLAN;
 824                         name = "hp-wifi";
 825                         break;
 826                 case HPWMI_BLUETOOTH:
 827                         type = RFKILL_TYPE_BLUETOOTH;
 828                         name = "hp-bluetooth";
 829                         break;
 830                 case HPWMI_WWAN:
 831                         type = RFKILL_TYPE_WWAN;
 832                         name = "hp-wwan";
 833                         break;
 834                 case HPWMI_GPS:
 835                         type = RFKILL_TYPE_GPS;
 836                         name = "hp-gps";
 837                         break;
 838                 default:
 839                         pr_warn("unknown device type 0x%x\n",
 840                                 state.device[i].radio_type);
 841                         continue;
 842                 }
 843
 844                 if (!state.device[i].vendor_id) {
 845                         pr_warn("zero device %d while %d reported\n",
 846                                 i, state.count);
 847                         continue;
 848                 }
 849
 850                 rfkill = rfkill_alloc(name, &device->dev, type,
 851                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 852                 if (!rfkill) {
 853                         err = -ENOMEM;
 854                         goto fail;
 855                 }
 856
 857                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 858                 rfkill2[rfkill2_count].num = i;
 859                 rfkill2[rfkill2_count].rfkill = rfkill;
 860
 861                 rfkill_init_sw_state(rfkill,
 862                                      IS_SWBLOCKED(state.device[i].power));
 863                 rfkill_set_hw_state(rfkill,
 864                                     IS_HWBLOCKED(state.device[i].power));
 865
 866                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 867                         pr_info("device %s blocked by BIOS\n", name);
 868
 869                 err = rfkill_register(rfkill);
 870                 if (err) {
 871                         rfkill_destroy(rfkill);
 872                         goto fail;
 873                 }
 874
 875                 rfkill2_count++;
 876         }
 877
 878         return 0;
 879 fail:
 880         for (; rfkill2_count > 0; rfkill2_count--) {
 881                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 882                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 883         }
 884         return err;
 885 }
 886
 887 static int __init hp_wmi_bios_setup(struct platform_device *device)
 888 {
 889         int err;
 890
 891         /* clear detected rfkill devices */
 892         wifi_rfkill = NULL;
 893         bluetooth_rfkill = NULL;
 894         wwan_rfkill = NULL;
 895         rfkill2_count = 0;
 896
 897         if (hp_wmi_rfkill_setup(device))
 898                 hp_wmi_rfkill2_setup(device);
 899
 900         err = device_create_file(&device->dev, &dev_attr_display);
 901         if (err)
 902                 goto add_sysfs_error;
 903         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 904         if (err)
 905                 goto add_sysfs_error;
 906         err = device_create_file(&device->dev, &dev_attr_als);
 907         if (err)
 908                 goto add_sysfs_error;
 909         err = device_create_file(&device->dev, &dev_attr_dock);
 910         if (err)
 911                 goto add_sysfs_error;
 912         err = device_create_file(&device->dev, &dev_attr_tablet);
 913         if (err)
 914                 goto add_sysfs_error;
 915         err = device_create_file(&device->dev, &dev_attr_postcode);
 916         if (err)
 917                 goto add_sysfs_error;
 918         return 0;
 919
 920 add_sysfs_error:
 921         cleanup_sysfs(device);
 922         return err;
 923 }
 924
 925 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 926 {
 927         int i;
 928         cleanup_sysfs(device);
 929
 930         for (i = 0; i < rfkill2_count; i++) {
 931                 rfkill_unregister(rfkill2[i].rfkill);
 932                 rfkill_destroy(rfkill2[i].rfkill);
 933         }
 934
 935         if (wifi_rfkill) {
 936                 rfkill_unregister(wifi_rfkill);
 937                 rfkill_destroy(wifi_rfkill);
 938         }
 939         if (bluetooth_rfkill) {
 940                 rfkill_unregister(bluetooth_rfkill);
 941                 rfkill_destroy(bluetooth_rfkill);
 942         }
 943         if (wwan_rfkill) {
 944                 rfkill_unregister(wwan_rfkill);
 945                 rfkill_destroy(wwan_rfkill);
 946         }
 947
 948         return 0;
 949 }
 950
 951 static int hp_wmi_resume_handler(struct device *device)
 952 {
 953         /*
 954          * Hardware state may have changed while suspended, so trigger
 955          * input events for the current state. As this is a switch,
 956          * the input layer will only actually pass it on if the state
 957          * changed.
 958          */
 959         if (hp_wmi_input_dev) {
 960                 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
 961                         input_report_switch(hp_wmi_input_dev, SW_DOCK,
 962                                             hp_wmi_hw_state(HPWMI_DOCK_MASK));
 963                 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
 964                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 965                                             hp_wmi_hw_state(HPWMI_TABLET_MASK));
 966                 input_sync(hp_wmi_input_dev);
 967         }
 968
 969         if (rfkill2_count)
 970                 hp_wmi_rfkill2_refresh();
 971
 972         if (wifi_rfkill)
 973                 rfkill_set_states(wifi_rfkill,
 974                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 975                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 976         if (bluetooth_rfkill)
 977                 rfkill_set_states(bluetooth_rfkill,
 978                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 979                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 980         if (wwan_rfkill)
 981                 rfkill_set_states(wwan_rfkill,
 982                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 983                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 984
 985         return 0;
 986 }
 987
 988 static const struct dev_pm_ops hp_wmi_pm_ops = {
 989         .resume  = hp_wmi_resume_handler,
 990         .restore  = hp_wmi_resume_handler,
 991 };
 992
 993 static struct platform_driver hp_wmi_driver = {
 994         .driver = {
 995                 .name = "hp-wmi",
 996                 .pm = &hp_wmi_pm_ops,
 997         },
 998         .remove = __exit_p(hp_wmi_bios_remove),
 999 };
1000
1001 static int __init hp_wmi_init(void)
1002 {
1003         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
1004         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
1005         int err;
1006
1007         if (!bios_capable && !event_capable)
1008                 return -ENODEV;
1009
1010         if (event_capable) {
1011                 err = hp_wmi_input_setup();
1012                 if (err)
1013                         return err;
1014         }
1015
1016         if (bios_capable) {
1017                 hp_wmi_platform_dev =
1018                         platform_device_register_simple("hp-wmi", -1, NULL, 0);
1019                 if (IS_ERR(hp_wmi_platform_dev)) {
1020                         err = PTR_ERR(hp_wmi_platform_dev);
1021                         goto err_destroy_input;
1022                 }
1023
1024                 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1025                 if (err)
1026                         goto err_unregister_device;
1027         }
1028
1029         return 0;
1030
1031 err_unregister_device:
1032         platform_device_unregister(hp_wmi_platform_dev);
1033 err_destroy_input:
1034         if (event_capable)
1035                 hp_wmi_input_destroy();
1036
1037         return err;
1038 }
1039 module_init(hp_wmi_init);
1040
1041 static void __exit hp_wmi_exit(void)
1042 {
1043         if (wmi_has_guid(HPWMI_EVENT_GUID))
1044                 hp_wmi_input_destroy();
1045
1046         if (hp_wmi_platform_dev) {
1047                 platform_device_unregister(hp_wmi_platform_dev);
1048                 platform_driver_unregister(&hp_wmi_driver);
1049         }
1050 }
1051 module_exit(hp_wmi_exit);