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