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