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         char *data;
  83 };
  84
  85 struct bios_return {
  86         u32 sigpass;
  87         u32 return_code;
  88 };
  89
  90 struct key_entry {
  91         char type;              /* See KE_* below */
  92         u16 code;
  93         u16 keycode;
  94 };
  95
  96 enum { KE_KEY, KE_END };
  97
  98 static struct key_entry hp_wmi_keymap[] = {
  99         {KE_KEY, 0x02, KEY_BRIGHTNESSUP},
 100         {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
 101         {KE_KEY, 0x20e6, KEY_PROG1},
 102         {KE_KEY, 0x20e8, KEY_MEDIA},
 103         {KE_KEY, 0x2142, KEY_MEDIA},
 104         {KE_KEY, 0x213b, KEY_INFO},
 105         {KE_KEY, 0x2169, KEY_DIRECTION},
 106         {KE_KEY, 0x231b, KEY_HELP},
 107         {KE_END, 0}
 108 };
 109
 110 static struct input_dev *hp_wmi_input_dev;
 111 static struct platform_device *hp_wmi_platform_dev;
 112
 113 static struct rfkill *wifi_rfkill;
 114 static struct rfkill *bluetooth_rfkill;
 115 static struct rfkill *wwan_rfkill;
 116
 117 static const struct dev_pm_ops hp_wmi_pm_ops = {
 118         .resume  = hp_wmi_resume_handler,
 119         .restore  = hp_wmi_resume_handler,
 120 };
 121
 122 static struct platform_driver hp_wmi_driver = {
 123         .driver = {
 124                 .name = "hp-wmi",
 125                 .owner = THIS_MODULE,
 126                 .pm = &hp_wmi_pm_ops,
 127         },
 128         .probe = hp_wmi_bios_setup,
 129         .remove = hp_wmi_bios_remove,
 130 };
 131
 132 /*
 133  * hp_wmi_perform_query
 134  *
 135  * query:       The commandtype -> What should be queried
 136  * write:       The command -> 0 read, 1 write, 3 ODM specific
 137  * buffer:      Buffer used as input and/or output
 138  * buffersize:  Size of buffer
 139  *
 140  * returns zero on success
 141  *         an HP WMI query specific error code (which is positive)
 142  *         -EINVAL if the query was not successful at all
 143  *         -EINVAL if the output buffer size exceeds buffersize
 144  *
 145  * Note: The buffersize must at least be the maximum of the input and output
 146  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
 147  *       and 128 byte output. The caller would do:
 148  *       buffer = kzalloc(128, GFP_KERNEL);
 149  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 128)
 150  */
 151 static int hp_wmi_perform_query(int query, int write, char *buffer,
 152                                 int buffersize)
 153 {
 154         struct bios_return bios_return;
 155         acpi_status status;
 156         union acpi_object *obj;
 157         struct bios_args args = {
 158                 .signature = 0x55434553,
 159                 .command = write ? 0x2 : 0x1,
 160                 .commandtype = query,
 161                 .datasize = buffersize,
 162                 .data = buffer,
 163         };
 164         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 165         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 166
 167         status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
 168
 169         obj = output.pointer;
 170
 171         if (!obj)
 172                 return -EINVAL;
 173         else if (obj->type != ACPI_TYPE_BUFFER) {
 174                 kfree(obj);
 175                 return -EINVAL;
 176         }
 177
 178         bios_return = *((struct bios_return *)obj->buffer.pointer);
 179
 180         if (bios_return.return_code) {
 181                 printk(KERN_WARNING PREFIX "Query %d returned %d\n", query,
 182                        bios_return.return_code);
 183                 kfree(obj);
 184                 return bios_return.return_code;
 185         }
 186         if (obj->buffer.length - sizeof(bios_return) > buffersize) {
 187                 kfree(obj);
 188                 return -EINVAL;
 189         }
 190
 191         memset(buffer, 0, buffersize);
 192         memcpy(buffer,
 193                ((char *)obj->buffer.pointer) + sizeof(struct bios_return),
 194                obj->buffer.length - sizeof(bios_return));
 195         kfree(obj);
 196         return 0;
 197 }
 198
 199 static int hp_wmi_display_state(void)
 200 {
 201         int state;
 202         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, (char *)&state,
 203                                        sizeof(state));
 204         if (ret)
 205                 return -EINVAL;
 206         return state;
 207 }
 208
 209 static int hp_wmi_hddtemp_state(void)
 210 {
 211         int state;
 212         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, (char *)&state,
 213                                        sizeof(state));
 214         if (ret)
 215                 return -EINVAL;
 216         return state;
 217 }
 218
 219 static int hp_wmi_als_state(void)
 220 {
 221         int state;
 222         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, (char *)&state,
 223                                        sizeof(state));
 224         if (ret)
 225                 return -EINVAL;
 226         return state;
 227 }
 228
 229 static int hp_wmi_dock_state(void)
 230 {
 231         int state;
 232         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, (char *)&state,
 233                                        sizeof(state));
 234
 235         if (ret)
 236                 return -EINVAL;
 237
 238         return state & 0x1;
 239 }
 240
 241 static int hp_wmi_tablet_state(void)
 242 {
 243         int state;
 244         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, (char *)&state,
 245                                        sizeof(state));
 246         if (ret)
 247                 return ret;
 248
 249         return (state & 0x4) ? 1 : 0;
 250 }
 251
 252 static int hp_wmi_set_block(void *data, bool blocked)
 253 {
 254         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 255         int query = BIT(r + 8) | ((!blocked) << r);
 256         int ret;
 257
 258         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 259                                    (char *)&query, sizeof(query));
 260         if (ret)
 261                 return -EINVAL;
 262         return 0;
 263 }
 264
 265 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 266         .set_block = hp_wmi_set_block,
 267 };
 268
 269 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 270 {
 271         int wireless;
 272         int mask;
 273         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 274                              (char *)&wireless, sizeof(wireless));
 275         /* TBD: Pass error */
 276
 277         mask = 0x200 << (r * 8);
 278
 279         if (wireless & mask)
 280                 return false;
 281         else
 282                 return true;
 283 }
 284
 285 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 286 {
 287         int wireless;
 288         int mask;
 289         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 290                              (char *)&wireless, sizeof(wireless));
 291         /* TBD: Pass error */
 292
 293         mask = 0x800 << (r * 8);
 294
 295         if (wireless & mask)
 296                 return false;
 297         else
 298                 return true;
 299 }
 300
 301 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 302                             char *buf)
 303 {
 304         int value = hp_wmi_display_state();
 305         if (value < 0)
 306                 return -EINVAL;
 307         return sprintf(buf, "%d\n", value);
 308 }
 309
 310 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 311                             char *buf)
 312 {
 313         int value = hp_wmi_hddtemp_state();
 314         if (value < 0)
 315                 return -EINVAL;
 316         return sprintf(buf, "%d\n", value);
 317 }
 318
 319 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 320                         char *buf)
 321 {
 322         int value = hp_wmi_als_state();
 323         if (value < 0)
 324                 return -EINVAL;
 325         return sprintf(buf, "%d\n", value);
 326 }
 327
 328 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 329                          char *buf)
 330 {
 331         int value = hp_wmi_dock_state();
 332         if (value < 0)
 333                 return -EINVAL;
 334         return sprintf(buf, "%d\n", value);
 335 }
 336
 337 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 338                          char *buf)
 339 {
 340         int value = hp_wmi_tablet_state();
 341         if (value < 0)
 342                 return -EINVAL;
 343         return sprintf(buf, "%d\n", value);
 344 }
 345
 346 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 347                        const char *buf, size_t count)
 348 {
 349         u32 tmp = simple_strtoul(buf, NULL, 10);
 350         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, (char *)&tmp,
 351                                        sizeof(tmp));
 352         if (ret)
 353                 return -EINVAL;
 354
 355         return count;
 356 }
 357
 358 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 359 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 360 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 361 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 362 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 363
 364 static struct key_entry *hp_wmi_get_entry_by_scancode(unsigned int code)
 365 {
 366         struct key_entry *key;
 367
 368         for (key = hp_wmi_keymap; key->type != KE_END; key++)
 369                 if (code == key->code)
 370                         return key;
 371
 372         return NULL;
 373 }
 374
 375 static struct key_entry *hp_wmi_get_entry_by_keycode(unsigned int keycode)
 376 {
 377         struct key_entry *key;
 378
 379         for (key = hp_wmi_keymap; key->type != KE_END; key++)
 380                 if (key->type == KE_KEY && keycode == key->keycode)
 381                         return key;
 382
 383         return NULL;
 384 }
 385
 386 static int hp_wmi_getkeycode(struct input_dev *dev,
 387                              unsigned int scancode, unsigned int *keycode)
 388 {
 389         struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
 390
 391         if (key && key->type == KE_KEY) {
 392                 *keycode = key->keycode;
 393                 return 0;
 394         }
 395
 396         return -EINVAL;
 397 }
 398
 399 static int hp_wmi_setkeycode(struct input_dev *dev,
 400                              unsigned int scancode, unsigned int keycode)
 401 {
 402         struct key_entry *key;
 403         unsigned int old_keycode;
 404
 405         key = hp_wmi_get_entry_by_scancode(scancode);
 406         if (key && key->type == KE_KEY) {
 407                 old_keycode = key->keycode;
 408                 key->keycode = keycode;
 409                 set_bit(keycode, dev->keybit);
 410                 if (!hp_wmi_get_entry_by_keycode(old_keycode))
 411                         clear_bit(old_keycode, dev->keybit);
 412                 return 0;
 413         }
 414
 415         return -EINVAL;
 416 }
 417
 418 static void hp_wmi_notify(u32 value, void *context)
 419 {
 420         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 421         static struct key_entry *key;
 422         union acpi_object *obj;
 423         u32 event_id, event_data;
 424         int key_code, ret;
 425         u32 *location;
 426         acpi_status status;
 427
 428         status = wmi_get_event_data(value, &response);
 429         if (status != AE_OK) {
 430                 printk(KERN_INFO PREFIX "bad event status 0x%x\n", status);
 431                 return;
 432         }
 433
 434         obj = (union acpi_object *)response.pointer;
 435
 436         if (!obj)
 437                 return;
 438         if (obj->type != ACPI_TYPE_BUFFER) {
 439                 printk(KERN_INFO "hp-wmi: Unknown response received %d\n",
 440                        obj->type);
 441                 kfree(obj);
 442                 return;
 443         }
 444
 445         /*
 446          * Depending on ACPI version the concatenation of id and event data
 447          * inside _WED function will result in a 8 or 16 byte buffer.
 448          */
 449         location = (u32 *)obj->buffer.pointer;
 450         if (obj->buffer.length == 8) {
 451                 event_id = *location;
 452                 event_data = *(location + 1);
 453         } else if (obj->buffer.length == 16) {
 454                 event_id = *location;
 455                 event_data = *(location + 2);
 456         } else {
 457                 printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n",
 458                        obj->buffer.length);
 459                 kfree(obj);
 460                 return;
 461         }
 462         kfree(obj);
 463
 464         switch (event_id) {
 465         case HPWMI_DOCK_EVENT:
 466                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 467                                     hp_wmi_dock_state());
 468                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 469                                     hp_wmi_tablet_state());
 470                 input_sync(hp_wmi_input_dev);
 471                 break;
 472         case HPWMI_PARK_HDD:
 473                 break;
 474         case HPWMI_SMART_ADAPTER:
 475                 break;
 476         case HPWMI_BEZEL_BUTTON:
 477                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 478                                            (char *)&key_code,
 479                                            sizeof(key_code));
 480                 if (ret)
 481                         break;
 482                 key = hp_wmi_get_entry_by_scancode(key_code);
 483                 if (key) {
 484                         switch (key->type) {
 485                         case KE_KEY:
 486                                 input_report_key(hp_wmi_input_dev,
 487                                                  key->keycode, 1);
 488                                 input_sync(hp_wmi_input_dev);
 489                                 input_report_key(hp_wmi_input_dev,
 490                                                  key->keycode, 0);
 491                                 input_sync(hp_wmi_input_dev);
 492                                 break;
 493                         }
 494                 } else
 495                         printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n",
 496                                key_code);
 497                 break;
 498         case HPWMI_WIRELESS:
 499                 if (wifi_rfkill)
 500                         rfkill_set_states(wifi_rfkill,
 501                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 502                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 503                 if (bluetooth_rfkill)
 504                         rfkill_set_states(bluetooth_rfkill,
 505                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 506                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 507                 if (wwan_rfkill)
 508                         rfkill_set_states(wwan_rfkill,
 509                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 510                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 511                 break;
 512         case HPWMI_CPU_BATTERY_THROTTLE:
 513                 printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell"
 514                        " battery event detected\n");
 515                 break;
 516         case HPWMI_LOCK_SWITCH:
 517                 break;
 518         default:
 519                 printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n",
 520                        event_id, event_data);
 521                 break;
 522         }
 523 }
 524
 525 static int __init hp_wmi_input_setup(void)
 526 {
 527         struct key_entry *key;
 528         int err;
 529
 530         hp_wmi_input_dev = input_allocate_device();
 531         if (!hp_wmi_input_dev)
 532                 return -ENOMEM;
 533
 534         hp_wmi_input_dev->name = "HP WMI hotkeys";
 535         hp_wmi_input_dev->phys = "wmi/input0";
 536         hp_wmi_input_dev->id.bustype = BUS_HOST;
 537         hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
 538         hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
 539
 540         for (key = hp_wmi_keymap; key->type != KE_END; key++) {
 541                 switch (key->type) {
 542                 case KE_KEY:
 543                         set_bit(EV_KEY, hp_wmi_input_dev->evbit);
 544                         set_bit(key->keycode, hp_wmi_input_dev->keybit);
 545                         break;
 546                 }
 547         }
 548
 549         set_bit(EV_SW, hp_wmi_input_dev->evbit);
 550         set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 551         set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 552
 553         /* Set initial hardware state */
 554         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
 555         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 556                             hp_wmi_tablet_state());
 557         input_sync(hp_wmi_input_dev);
 558
 559         err = input_register_device(hp_wmi_input_dev);
 560
 561         if (err) {
 562                 input_free_device(hp_wmi_input_dev);
 563                 return err;
 564         }
 565
 566         return 0;
 567 }
 568
 569 static void cleanup_sysfs(struct platform_device *device)
 570 {
 571         device_remove_file(&device->dev, &dev_attr_display);
 572         device_remove_file(&device->dev, &dev_attr_hddtemp);
 573         device_remove_file(&device->dev, &dev_attr_als);
 574         device_remove_file(&device->dev, &dev_attr_dock);
 575         device_remove_file(&device->dev, &dev_attr_tablet);
 576 }
 577
 578 static int __devinit hp_wmi_bios_setup(struct platform_device *device)
 579 {
 580         int err;
 581         int wireless;
 582
 583         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, (char *)&wireless,
 584                                    sizeof(wireless));
 585         if (err)
 586                 return err;
 587
 588         err = device_create_file(&device->dev, &dev_attr_display);
 589         if (err)
 590                 goto add_sysfs_error;
 591         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 592         if (err)
 593                 goto add_sysfs_error;
 594         err = device_create_file(&device->dev, &dev_attr_als);
 595         if (err)
 596                 goto add_sysfs_error;
 597         err = device_create_file(&device->dev, &dev_attr_dock);
 598         if (err)
 599                 goto add_sysfs_error;
 600         err = device_create_file(&device->dev, &dev_attr_tablet);
 601         if (err)
 602                 goto add_sysfs_error;
 603
 604         if (wireless & 0x1) {
 605                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 606                                            RFKILL_TYPE_WLAN,
 607                                            &hp_wmi_rfkill_ops,
 608                                            (void *) HPWMI_WIFI);
 609                 rfkill_init_sw_state(wifi_rfkill,
 610                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 611                 rfkill_set_hw_state(wifi_rfkill,
 612                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 613                 err = rfkill_register(wifi_rfkill);
 614                 if (err)
 615                         goto register_wifi_error;
 616         }
 617
 618         if (wireless & 0x2) {
 619                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 620                                                 RFKILL_TYPE_BLUETOOTH,
 621                                                 &hp_wmi_rfkill_ops,
 622                                                 (void *) HPWMI_BLUETOOTH);
 623                 rfkill_init_sw_state(bluetooth_rfkill,
 624                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 625                 rfkill_set_hw_state(bluetooth_rfkill,
 626                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 627                 err = rfkill_register(bluetooth_rfkill);
 628                 if (err)
 629                         goto register_bluetooth_error;
 630         }
 631
 632         if (wireless & 0x4) {
 633                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 634                                            RFKILL_TYPE_WWAN,
 635                                            &hp_wmi_rfkill_ops,
 636                                            (void *) HPWMI_WWAN);
 637                 rfkill_init_sw_state(wwan_rfkill,
 638                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 639                 rfkill_set_hw_state(wwan_rfkill,
 640                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 641                 err = rfkill_register(wwan_rfkill);
 642                 if (err)
 643                         goto register_wwan_err;
 644         }
 645
 646         return 0;
 647 register_wwan_err:
 648         rfkill_destroy(wwan_rfkill);
 649         if (bluetooth_rfkill)
 650                 rfkill_unregister(bluetooth_rfkill);
 651 register_bluetooth_error:
 652         rfkill_destroy(bluetooth_rfkill);
 653         if (wifi_rfkill)
 654                 rfkill_unregister(wifi_rfkill);
 655 register_wifi_error:
 656         rfkill_destroy(wifi_rfkill);
 657 add_sysfs_error:
 658         cleanup_sysfs(device);
 659         return err;
 660 }
 661
 662 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 663 {
 664         cleanup_sysfs(device);
 665
 666         if (wifi_rfkill) {
 667                 rfkill_unregister(wifi_rfkill);
 668                 rfkill_destroy(wifi_rfkill);
 669         }
 670         if (bluetooth_rfkill) {
 671                 rfkill_unregister(bluetooth_rfkill);
 672                 rfkill_destroy(bluetooth_rfkill);
 673         }
 674         if (wwan_rfkill) {
 675                 rfkill_unregister(wwan_rfkill);
 676                 rfkill_destroy(wwan_rfkill);
 677         }
 678
 679         return 0;
 680 }
 681
 682 static int hp_wmi_resume_handler(struct device *device)
 683 {
 684         /*
 685          * Hardware state may have changed while suspended, so trigger
 686          * input events for the current state. As this is a switch,
 687          * the input layer will only actually pass it on if the state
 688          * changed.
 689          */
 690         if (hp_wmi_input_dev) {
 691                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 692                                     hp_wmi_dock_state());
 693                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 694                                     hp_wmi_tablet_state());
 695                 input_sync(hp_wmi_input_dev);
 696         }
 697
 698         if (wifi_rfkill)
 699                 rfkill_set_states(wifi_rfkill,
 700                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 701                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 702         if (bluetooth_rfkill)
 703                 rfkill_set_states(bluetooth_rfkill,
 704                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 705                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 706         if (wwan_rfkill)
 707                 rfkill_set_states(wwan_rfkill,
 708                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 709                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 710
 711         return 0;
 712 }
 713
 714 static int __init hp_wmi_init(void)
 715 {
 716         int err;
 717         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
 718         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
 719
 720         if (event_capable) {
 721                 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
 722                                                  hp_wmi_notify, NULL);
 723                 if (ACPI_FAILURE(err))
 724                         return -EINVAL;
 725                 err = hp_wmi_input_setup();
 726                 if (err) {
 727                         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 728                         return err;
 729                 }
 730         }
 731
 732         if (bios_capable) {
 733                 err = platform_driver_register(&hp_wmi_driver);
 734                 if (err)
 735                         goto err_driver_reg;
 736                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
 737                 if (!hp_wmi_platform_dev) {
 738                         err = -ENOMEM;
 739                         goto err_device_alloc;
 740                 }
 741                 err = platform_device_add(hp_wmi_platform_dev);
 742                 if (err)
 743                         goto err_device_add;
 744         }
 745
 746         if (!bios_capable && !event_capable)
 747                 return -ENODEV;
 748
 749         return 0;
 750
 751 err_device_add:
 752         platform_device_put(hp_wmi_platform_dev);
 753 err_device_alloc:
 754         platform_driver_unregister(&hp_wmi_driver);
 755 err_driver_reg:
 756         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
 757                 input_unregister_device(hp_wmi_input_dev);
 758                 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 759         }
 760
 761         return err;
 762 }
 763
 764 static void __exit hp_wmi_exit(void)
 765 {
 766         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
 767                 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 768                 input_unregister_device(hp_wmi_input_dev);
 769         }
 770         if (hp_wmi_platform_dev) {
 771                 platform_device_unregister(hp_wmi_platform_dev);
 772                 platform_driver_unregister(&hp_wmi_driver);
 773         }
 774 }
 775
 776 module_init(hp_wmi_init);
 777 module_exit(hp_wmi_exit);