drivers/platform/x86/hp-wmi.c

   1 /*
   2  * HP WMI hotkeys
   3  *
   4  * Copyright (C) 2008 Red Hat <mjg@redhat.com>
   5  *
   6  * Portions based on wistron_btns.c:
   7  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
   8  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
   9  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28 #include <linux/init.h>
  29 #include <linux/slab.h>
  30 #include <linux/types.h>
  31 #include <linux/input.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/acpi.h>
  34 #include <linux/rfkill.h>
  35 #include <linux/string.h>
  36
  37 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
  38 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
  39 MODULE_LICENSE("GPL");
  40
  41 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
  42 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
  43
  44 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  45 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
  46
  47 #define HPWMI_DISPLAY_QUERY 0x1
  48 #define HPWMI_HDDTEMP_QUERY 0x2
  49 #define HPWMI_ALS_QUERY 0x3
  50 #define HPWMI_HARDWARE_QUERY 0x4
  51 #define HPWMI_WIRELESS_QUERY 0x5
  52 #define HPWMI_HOTKEY_QUERY 0xc
  53
  54 #define PREFIX "HP WMI: "
  55 #define UNIMP "Unimplemented "
  56
  57 enum hp_wmi_radio {
  58         HPWMI_WIFI = 0,
  59         HPWMI_BLUETOOTH = 1,
  60         HPWMI_WWAN = 2,
  61 };
  62
  63 enum hp_wmi_event_ids {
  64         HPWMI_DOCK_EVENT = 1,
  65         HPWMI_PARK_HDD = 2,
  66         HPWMI_SMART_ADAPTER = 3,
  67         HPWMI_BEZEL_BUTTON = 4,
  68         HPWMI_WIRELESS = 5,
  69         HPWMI_CPU_BATTERY_THROTTLE = 6,
  70         HPWMI_LOCK_SWITCH = 7,
  71 };
  72
  73 static int __devinit hp_wmi_bios_setup(struct platform_device *device);
  74 static int __exit hp_wmi_bios_remove(struct platform_device *device);
  75 static int hp_wmi_resume_handler(struct device *device);
  76
  77 struct bios_args {
  78         u32 signature;
  79         u32 command;
  80         u32 commandtype;
  81         u32 datasize;
  82         u32 data;
  83 };
  84
  85 struct bios_return {
  86         u32 sigpass;
  87         u32 return_code;
  88         u32 value;
  89 };
  90
  91 struct key_entry {
  92         char type;              /* See KE_* below */
  93         u16 code;
  94         u16 keycode;
  95 };
  96
  97 enum { KE_KEY, KE_END };
  98
  99 static struct key_entry hp_wmi_keymap[] = {
 100         {KE_KEY, 0x02, KEY_BRIGHTNESSUP},
 101         {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
 102         {KE_KEY, 0x20e6, KEY_PROG1},
 103         {KE_KEY, 0x20e8, KEY_MEDIA},
 104         {KE_KEY, 0x2142, KEY_MEDIA},
 105         {KE_KEY, 0x213b, KEY_INFO},
 106         {KE_KEY, 0x2169, KEY_DIRECTION},
 107         {KE_KEY, 0x231b, KEY_HELP},
 108         {KE_END, 0}
 109 };
 110
 111 static struct input_dev *hp_wmi_input_dev;
 112 static struct platform_device *hp_wmi_platform_dev;
 113
 114 static struct rfkill *wifi_rfkill;
 115 static struct rfkill *bluetooth_rfkill;
 116 static struct rfkill *wwan_rfkill;
 117
 118 static const struct dev_pm_ops hp_wmi_pm_ops = {
 119         .resume  = hp_wmi_resume_handler,
 120         .restore  = hp_wmi_resume_handler,
 121 };
 122
 123 static struct platform_driver hp_wmi_driver = {
 124         .driver = {
 125                 .name = "hp-wmi",
 126                 .owner = THIS_MODULE,
 127                 .pm = &hp_wmi_pm_ops,
 128         },
 129         .probe = hp_wmi_bios_setup,
 130         .remove = hp_wmi_bios_remove,
 131 };
 132
 133 /*
 134  * hp_wmi_perform_query
 135  *
 136  * query:       The commandtype -> What should be queried
 137  * write:       The command -> 0 read, 1 write, 3 ODM specific
 138  * buffer:      Buffer used as input and/or output
 139  * buffersize:  Size of buffer
 140  *
 141  * returns zero on success
 142  *         an HP WMI query specific error code (which is positive)
 143  *         -EINVAL if the query was not successful at all
 144  *         -EINVAL if the output buffer size exceeds buffersize
 145  *
 146  * Note: The buffersize must at least be the maximum of the input and output
 147  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
 148  *       and 128 byte output. The caller would do:
 149  *       buffer = kzalloc(128, GFP_KERNEL);
 150  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 128)
 151  */
 152 static int hp_wmi_perform_query(int query, int write, u32 *buffer,
 153                                 int buffersize)
 154 {
 155         struct bios_return bios_return;
 156         acpi_status status;
 157         union acpi_object *obj;
 158         struct bios_args args = {
 159                 .signature = 0x55434553,
 160                 .command = write ? 0x2 : 0x1,
 161                 .commandtype = query,
 162                 .datasize = buffersize,
 163                 .data = *buffer,
 164         };
 165         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 166         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 167
 168         status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
 169
 170         obj = output.pointer;
 171
 172         if (!obj)
 173                 return -EINVAL;
 174         else if (obj->type != ACPI_TYPE_BUFFER) {
 175                 kfree(obj);
 176                 return -EINVAL;
 177         }
 178
 179         bios_return = *((struct bios_return *)obj->buffer.pointer);
 180
 181         memcpy(buffer, &bios_return.value, sizeof(bios_return.value));
 182         return 0;
 183 }
 184
 185 static int hp_wmi_display_state(void)
 186 {
 187         int state = 0;
 188         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
 189                                        sizeof(state));
 190         if (ret)
 191                 return -EINVAL;
 192         return state;
 193 }
 194
 195 static int hp_wmi_hddtemp_state(void)
 196 {
 197         int state = 0;
 198         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
 199                                        sizeof(state));
 200         if (ret)
 201                 return -EINVAL;
 202         return state;
 203 }
 204
 205 static int hp_wmi_als_state(void)
 206 {
 207         int state = 0;
 208         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
 209                                        sizeof(state));
 210         if (ret)
 211                 return -EINVAL;
 212         return state;
 213 }
 214
 215 static int hp_wmi_dock_state(void)
 216 {
 217         int state = 0;
 218         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 219                                        sizeof(state));
 220
 221         if (ret)
 222                 return -EINVAL;
 223
 224         return state & 0x1;
 225 }
 226
 227 static int hp_wmi_tablet_state(void)
 228 {
 229         int state = 0;
 230         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 231                                        sizeof(state));
 232         if (ret)
 233                 return ret;
 234
 235         return (state & 0x4) ? 1 : 0;
 236 }
 237
 238 static int hp_wmi_set_block(void *data, bool blocked)
 239 {
 240         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 241         int query = BIT(r + 8) | ((!blocked) << r);
 242         int ret;
 243
 244         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 245                                    &query, sizeof(query));
 246         if (ret)
 247                 return -EINVAL;
 248         return 0;
 249 }
 250
 251 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 252         .set_block = hp_wmi_set_block,
 253 };
 254
 255 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 256 {
 257         int wireless = 0;
 258         int mask;
 259         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 260                              &wireless, sizeof(wireless));
 261         /* TBD: Pass error */
 262
 263         mask = 0x200 << (r * 8);
 264
 265         if (wireless & mask)
 266                 return false;
 267         else
 268                 return true;
 269 }
 270
 271 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 272 {
 273         int wireless = 0;
 274         int mask;
 275         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 276                              &wireless, sizeof(wireless));
 277         /* TBD: Pass error */
 278
 279         mask = 0x800 << (r * 8);
 280
 281         if (wireless & mask)
 282                 return false;
 283         else
 284                 return true;
 285 }
 286
 287 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 288                             char *buf)
 289 {
 290         int value = hp_wmi_display_state();
 291         if (value < 0)
 292                 return -EINVAL;
 293         return sprintf(buf, "%d\n", value);
 294 }
 295
 296 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 297                             char *buf)
 298 {
 299         int value = hp_wmi_hddtemp_state();
 300         if (value < 0)
 301                 return -EINVAL;
 302         return sprintf(buf, "%d\n", value);
 303 }
 304
 305 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 306                         char *buf)
 307 {
 308         int value = hp_wmi_als_state();
 309         if (value < 0)
 310                 return -EINVAL;
 311         return sprintf(buf, "%d\n", value);
 312 }
 313
 314 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 315                          char *buf)
 316 {
 317         int value = hp_wmi_dock_state();
 318         if (value < 0)
 319                 return -EINVAL;
 320         return sprintf(buf, "%d\n", value);
 321 }
 322
 323 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 324                          char *buf)
 325 {
 326         int value = hp_wmi_tablet_state();
 327         if (value < 0)
 328                 return -EINVAL;
 329         return sprintf(buf, "%d\n", value);
 330 }
 331
 332 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 333                        const char *buf, size_t count)
 334 {
 335         u32 tmp = simple_strtoul(buf, NULL, 10);
 336         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
 337                                        sizeof(tmp));
 338         if (ret)
 339                 return -EINVAL;
 340
 341         return count;
 342 }
 343
 344 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 345 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 346 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 347 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 348 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 349
 350 static struct key_entry *hp_wmi_get_entry_by_scancode(unsigned int code)
 351 {
 352         struct key_entry *key;
 353
 354         for (key = hp_wmi_keymap; key->type != KE_END; key++)
 355                 if (code == key->code)
 356                         return key;
 357
 358         return NULL;
 359 }
 360
 361 static struct key_entry *hp_wmi_get_entry_by_keycode(unsigned int keycode)
 362 {
 363         struct key_entry *key;
 364
 365         for (key = hp_wmi_keymap; key->type != KE_END; key++)
 366                 if (key->type == KE_KEY && keycode == key->keycode)
 367                         return key;
 368
 369         return NULL;
 370 }
 371
 372 static int hp_wmi_getkeycode(struct input_dev *dev,
 373                              unsigned int scancode, unsigned int *keycode)
 374 {
 375         struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
 376
 377         if (key && key->type == KE_KEY) {
 378                 *keycode = key->keycode;
 379                 return 0;
 380         }
 381
 382         return -EINVAL;
 383 }
 384
 385 static int hp_wmi_setkeycode(struct input_dev *dev,
 386                              unsigned int scancode, unsigned int keycode)
 387 {
 388         struct key_entry *key;
 389         unsigned int old_keycode;
 390
 391         key = hp_wmi_get_entry_by_scancode(scancode);
 392         if (key && key->type == KE_KEY) {
 393                 old_keycode = key->keycode;
 394                 key->keycode = keycode;
 395                 set_bit(keycode, dev->keybit);
 396                 if (!hp_wmi_get_entry_by_keycode(old_keycode))
 397                         clear_bit(old_keycode, dev->keybit);
 398                 return 0;
 399         }
 400
 401         return -EINVAL;
 402 }
 403
 404 static void hp_wmi_notify(u32 value, void *context)
 405 {
 406         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 407         static struct key_entry *key;
 408         union acpi_object *obj;
 409         u32 event_id, event_data;
 410         int key_code = 0, ret;
 411         u32 *location;
 412         acpi_status status;
 413
 414         status = wmi_get_event_data(value, &response);
 415         if (status != AE_OK) {
 416                 printk(KERN_INFO PREFIX "bad event status 0x%x\n", status);
 417                 return;
 418         }
 419
 420         obj = (union acpi_object *)response.pointer;
 421
 422         if (!obj)
 423                 return;
 424         if (obj->type != ACPI_TYPE_BUFFER) {
 425                 printk(KERN_INFO "hp-wmi: Unknown response received %d\n",
 426                        obj->type);
 427                 kfree(obj);
 428                 return;
 429         }
 430
 431         /*
 432          * Depending on ACPI version the concatenation of id and event data
 433          * inside _WED function will result in a 8 or 16 byte buffer.
 434          */
 435         location = (u32 *)obj->buffer.pointer;
 436         if (obj->buffer.length == 8) {
 437                 event_id = *location;
 438                 event_data = *(location + 1);
 439         } else if (obj->buffer.length == 16) {
 440                 event_id = *location;
 441                 event_data = *(location + 2);
 442         } else {
 443                 printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n",
 444                        obj->buffer.length);
 445                 kfree(obj);
 446                 return;
 447         }
 448         kfree(obj);
 449
 450         switch (event_id) {
 451         case HPWMI_DOCK_EVENT:
 452                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 453                                     hp_wmi_dock_state());
 454                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 455                                     hp_wmi_tablet_state());
 456                 input_sync(hp_wmi_input_dev);
 457                 break;
 458         case HPWMI_PARK_HDD:
 459                 break;
 460         case HPWMI_SMART_ADAPTER:
 461                 break;
 462         case HPWMI_BEZEL_BUTTON:
 463                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 464                                            &key_code,
 465                                            sizeof(key_code));
 466                 if (ret)
 467                         break;
 468                 key = hp_wmi_get_entry_by_scancode(key_code);
 469                 if (key) {
 470                         switch (key->type) {
 471                         case KE_KEY:
 472                                 input_report_key(hp_wmi_input_dev,
 473                                                  key->keycode, 1);
 474                                 input_sync(hp_wmi_input_dev);
 475                                 input_report_key(hp_wmi_input_dev,
 476                                                  key->keycode, 0);
 477                                 input_sync(hp_wmi_input_dev);
 478                                 break;
 479                         }
 480                 } else
 481                         printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n",
 482                                key_code);
 483                 break;
 484         case HPWMI_WIRELESS:
 485                 if (wifi_rfkill)
 486                         rfkill_set_states(wifi_rfkill,
 487                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 488                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 489                 if (bluetooth_rfkill)
 490                         rfkill_set_states(bluetooth_rfkill,
 491                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 492                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 493                 if (wwan_rfkill)
 494                         rfkill_set_states(wwan_rfkill,
 495                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 496                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 497                 break;
 498         case HPWMI_CPU_BATTERY_THROTTLE:
 499                 printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell"
 500                        " battery event detected\n");
 501                 break;
 502         case HPWMI_LOCK_SWITCH:
 503                 break;
 504         default:
 505                 printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n",
 506                        event_id, event_data);
 507                 break;
 508         }
 509 }
 510
 511 static int __init hp_wmi_input_setup(void)
 512 {
 513         struct key_entry *key;
 514         int err;
 515
 516         hp_wmi_input_dev = input_allocate_device();
 517         if (!hp_wmi_input_dev)
 518                 return -ENOMEM;
 519
 520         hp_wmi_input_dev->name = "HP WMI hotkeys";
 521         hp_wmi_input_dev->phys = "wmi/input0";
 522         hp_wmi_input_dev->id.bustype = BUS_HOST;
 523         hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
 524         hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
 525
 526         for (key = hp_wmi_keymap; key->type != KE_END; key++) {
 527                 switch (key->type) {
 528                 case KE_KEY:
 529                         set_bit(EV_KEY, hp_wmi_input_dev->evbit);
 530                         set_bit(key->keycode, hp_wmi_input_dev->keybit);
 531                         break;
 532                 }
 533         }
 534
 535         set_bit(EV_SW, hp_wmi_input_dev->evbit);
 536         set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 537         set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 538
 539         /* Set initial hardware state */
 540         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
 541         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 542                             hp_wmi_tablet_state());
 543         input_sync(hp_wmi_input_dev);
 544
 545         err = input_register_device(hp_wmi_input_dev);
 546
 547         if (err) {
 548                 input_free_device(hp_wmi_input_dev);
 549                 return err;
 550         }
 551
 552         return 0;
 553 }
 554
 555 static void cleanup_sysfs(struct platform_device *device)
 556 {
 557         device_remove_file(&device->dev, &dev_attr_display);
 558         device_remove_file(&device->dev, &dev_attr_hddtemp);
 559         device_remove_file(&device->dev, &dev_attr_als);
 560         device_remove_file(&device->dev, &dev_attr_dock);
 561         device_remove_file(&device->dev, &dev_attr_tablet);
 562 }
 563
 564 static int __devinit hp_wmi_bios_setup(struct platform_device *device)
 565 {
 566         int err;
 567         int wireless = 0;
 568
 569         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
 570                                    sizeof(wireless));
 571         if (err)
 572                 return err;
 573
 574         err = device_create_file(&device->dev, &dev_attr_display);
 575         if (err)
 576                 goto add_sysfs_error;
 577         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 578         if (err)
 579                 goto add_sysfs_error;
 580         err = device_create_file(&device->dev, &dev_attr_als);
 581         if (err)
 582                 goto add_sysfs_error;
 583         err = device_create_file(&device->dev, &dev_attr_dock);
 584         if (err)
 585                 goto add_sysfs_error;
 586         err = device_create_file(&device->dev, &dev_attr_tablet);
 587         if (err)
 588                 goto add_sysfs_error;
 589
 590         if (wireless & 0x1) {
 591                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 592                                            RFKILL_TYPE_WLAN,
 593                                            &hp_wmi_rfkill_ops,
 594                                            (void *) HPWMI_WIFI);
 595                 rfkill_init_sw_state(wifi_rfkill,
 596                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 597                 rfkill_set_hw_state(wifi_rfkill,
 598                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 599                 err = rfkill_register(wifi_rfkill);
 600                 if (err)
 601                         goto register_wifi_error;
 602         }
 603
 604         if (wireless & 0x2) {
 605                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 606                                                 RFKILL_TYPE_BLUETOOTH,
 607                                                 &hp_wmi_rfkill_ops,
 608                                                 (void *) HPWMI_BLUETOOTH);
 609                 rfkill_init_sw_state(bluetooth_rfkill,
 610                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 611                 rfkill_set_hw_state(bluetooth_rfkill,
 612                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 613                 err = rfkill_register(bluetooth_rfkill);
 614                 if (err)
 615                         goto register_bluetooth_error;
 616         }
 617
 618         if (wireless & 0x4) {
 619                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 620                                            RFKILL_TYPE_WWAN,
 621                                            &hp_wmi_rfkill_ops,
 622                                            (void *) HPWMI_WWAN);
 623                 rfkill_init_sw_state(wwan_rfkill,
 624                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 625                 rfkill_set_hw_state(wwan_rfkill,
 626                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 627                 err = rfkill_register(wwan_rfkill);
 628                 if (err)
 629                         goto register_wwan_err;
 630         }
 631
 632         return 0;
 633 register_wwan_err:
 634         rfkill_destroy(wwan_rfkill);
 635         if (bluetooth_rfkill)
 636                 rfkill_unregister(bluetooth_rfkill);
 637 register_bluetooth_error:
 638         rfkill_destroy(bluetooth_rfkill);
 639         if (wifi_rfkill)
 640                 rfkill_unregister(wifi_rfkill);
 641 register_wifi_error:
 642         rfkill_destroy(wifi_rfkill);
 643 add_sysfs_error:
 644         cleanup_sysfs(device);
 645         return err;
 646 }
 647
 648 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 649 {
 650         cleanup_sysfs(device);
 651
 652         if (wifi_rfkill) {
 653                 rfkill_unregister(wifi_rfkill);
 654                 rfkill_destroy(wifi_rfkill);
 655         }
 656         if (bluetooth_rfkill) {
 657                 rfkill_unregister(bluetooth_rfkill);
 658                 rfkill_destroy(bluetooth_rfkill);
 659         }
 660         if (wwan_rfkill) {
 661                 rfkill_unregister(wwan_rfkill);
 662                 rfkill_destroy(wwan_rfkill);
 663         }
 664
 665         return 0;
 666 }
 667
 668 static int hp_wmi_resume_handler(struct device *device)
 669 {
 670         /*
 671          * Hardware state may have changed while suspended, so trigger
 672          * input events for the current state. As this is a switch,
 673          * the input layer will only actually pass it on if the state
 674          * changed.
 675          */
 676         if (hp_wmi_input_dev) {
 677                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 678                                     hp_wmi_dock_state());
 679                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 680                                     hp_wmi_tablet_state());
 681                 input_sync(hp_wmi_input_dev);
 682         }
 683
 684         if (wifi_rfkill)
 685                 rfkill_set_states(wifi_rfkill,
 686                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 687                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 688         if (bluetooth_rfkill)
 689                 rfkill_set_states(bluetooth_rfkill,
 690                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 691                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 692         if (wwan_rfkill)
 693                 rfkill_set_states(wwan_rfkill,
 694                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 695                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 696
 697         return 0;
 698 }
 699
 700 static int __init hp_wmi_init(void)
 701 {
 702         int err;
 703         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
 704         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
 705
 706         if (event_capable) {
 707                 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
 708                                                  hp_wmi_notify, NULL);
 709                 if (ACPI_FAILURE(err))
 710                         return -EINVAL;
 711                 err = hp_wmi_input_setup();
 712                 if (err) {
 713                         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 714                         return err;
 715                 }
 716         }
 717
 718         if (bios_capable) {
 719                 err = platform_driver_register(&hp_wmi_driver);
 720                 if (err)
 721                         goto err_driver_reg;
 722                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
 723                 if (!hp_wmi_platform_dev) {
 724                         err = -ENOMEM;
 725                         goto err_device_alloc;
 726                 }
 727                 err = platform_device_add(hp_wmi_platform_dev);
 728                 if (err)
 729                         goto err_device_add;
 730         }
 731
 732         if (!bios_capable && !event_capable)
 733                 return -ENODEV;
 734
 735         return 0;
 736
 737 err_device_add:
 738         platform_device_put(hp_wmi_platform_dev);
 739 err_device_alloc:
 740         platform_driver_unregister(&hp_wmi_driver);
 741 err_driver_reg:
 742         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
 743                 input_unregister_device(hp_wmi_input_dev);
 744                 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 745         }
 746
 747         return err;
 748 }
 749
 750 static void __exit hp_wmi_exit(void)
 751 {
 752         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
 753                 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 754                 input_unregister_device(hp_wmi_input_dev);
 755         }
 756         if (hp_wmi_platform_dev) {
 757                 platform_device_unregister(hp_wmi_platform_dev);
 758                 platform_driver_unregister(&hp_wmi_driver);
 759         }
 760 }
 761
 762 module_init(hp_wmi_init);
 763 module_exit(hp_wmi_exit);