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 <acpi/acpi_drivers.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/acpi.h>
  35 #include <linux/rfkill.h>
  36 #include <linux/string.h>
  37
  38 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
  39 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
  40 MODULE_LICENSE("GPL");
  41
  42 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
  43 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
  44
  45 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  46 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
  47
  48 #define HPWMI_DISPLAY_QUERY 0x1
  49 #define HPWMI_HDDTEMP_QUERY 0x2
  50 #define HPWMI_ALS_QUERY 0x3
  51 #define HPWMI_HARDWARE_QUERY 0x4
  52 #define HPWMI_WIRELESS_QUERY 0x5
  53 #define HPWMI_HOTKEY_QUERY 0xc
  54
  55 #define PREFIX "HP WMI: "
  56 #define UNIMP "Unimplemented "
  57
  58 enum hp_wmi_radio {
  59         HPWMI_WIFI = 0,
  60         HPWMI_BLUETOOTH = 1,
  61         HPWMI_WWAN = 2,
  62 };
  63
  64 enum hp_wmi_event_ids {
  65         HPWMI_DOCK_EVENT = 1,
  66         HPWMI_PARK_HDD = 2,
  67         HPWMI_SMART_ADAPTER = 3,
  68         HPWMI_BEZEL_BUTTON = 4,
  69         HPWMI_WIRELESS = 5,
  70         HPWMI_CPU_BATTERY_THROTTLE = 6,
  71         HPWMI_LOCK_SWITCH = 7,
  72 };
  73
  74 static int __devinit hp_wmi_bios_setup(struct platform_device *device);
  75 static int __exit hp_wmi_bios_remove(struct platform_device *device);
  76 static int hp_wmi_resume_handler(struct device *device);
  77
  78 struct bios_args {
  79         u32 signature;
  80         u32 command;
  81         u32 commandtype;
  82         u32 datasize;
  83         char *data;
  84 };
  85
  86 struct bios_return {
  87         u32 sigpass;
  88         u32 return_code;
  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, char *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         if (bios_return.return_code) {
 182                 printk(KERN_WARNING PREFIX "Query %d returned %d\n", query,
 183                        bios_return.return_code);
 184                 kfree(obj);
 185                 return bios_return.return_code;
 186         }
 187         if (obj->buffer.length - sizeof(bios_return) > buffersize) {
 188                 kfree(obj);
 189                 return -EINVAL;
 190         }
 191
 192         memset(buffer, 0, buffersize);
 193         memcpy(buffer,
 194                ((char *)obj->buffer.pointer) + sizeof(struct bios_return),
 195                obj->buffer.length - sizeof(bios_return));
 196         kfree(obj);
 197         return 0;
 198 }
 199
 200 static int hp_wmi_display_state(void)
 201 {
 202         int state;
 203         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, (char *)&state,
 204                                        sizeof(state));
 205         if (ret)
 206                 return -EINVAL;
 207         return state;
 208 }
 209
 210 static int hp_wmi_hddtemp_state(void)
 211 {
 212         int state;
 213         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, (char *)&state,
 214                                        sizeof(state));
 215         if (ret)
 216                 return -EINVAL;
 217         return state;
 218 }
 219
 220 static int hp_wmi_als_state(void)
 221 {
 222         int state;
 223         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, (char *)&state,
 224                                        sizeof(state));
 225         if (ret)
 226                 return -EINVAL;
 227         return state;
 228 }
 229
 230 static int hp_wmi_dock_state(void)
 231 {
 232         int state;
 233         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, (char *)&state,
 234                                        sizeof(state));
 235
 236         if (ret)
 237                 return -EINVAL;
 238
 239         return state & 0x1;
 240 }
 241
 242 static int hp_wmi_tablet_state(void)
 243 {
 244         int state;
 245         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, (char *)&state,
 246                                        sizeof(state));
 247         if (ret)
 248                 return ret;
 249
 250         return (state & 0x4) ? 1 : 0;
 251 }
 252
 253 static int hp_wmi_set_block(void *data, bool blocked)
 254 {
 255         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 256         int query = BIT(r + 8) | ((!blocked) << r);
 257         int ret;
 258
 259         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 260                                    (char *)&query, sizeof(query));
 261         if (ret)
 262                 return -EINVAL;
 263         return 0;
 264 }
 265
 266 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 267         .set_block = hp_wmi_set_block,
 268 };
 269
 270 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 271 {
 272         int wireless;
 273         int mask;
 274         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 275                              (char *)&wireless, sizeof(wireless));
 276         /* TBD: Pass error */
 277
 278         mask = 0x200 << (r * 8);
 279
 280         if (wireless & mask)
 281                 return false;
 282         else
 283                 return true;
 284 }
 285
 286 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 287 {
 288         int wireless;
 289         int mask;
 290         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 291                              (char *)&wireless, sizeof(wireless));
 292         /* TBD: Pass error */
 293
 294         mask = 0x800 << (r * 8);
 295
 296         if (wireless & mask)
 297                 return false;
 298         else
 299                 return true;
 300 }
 301
 302 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 303                             char *buf)
 304 {
 305         int value = hp_wmi_display_state();
 306         if (value < 0)
 307                 return -EINVAL;
 308         return sprintf(buf, "%d\n", value);
 309 }
 310
 311 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 312                             char *buf)
 313 {
 314         int value = hp_wmi_hddtemp_state();
 315         if (value < 0)
 316                 return -EINVAL;
 317         return sprintf(buf, "%d\n", value);
 318 }
 319
 320 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 321                         char *buf)
 322 {
 323         int value = hp_wmi_als_state();
 324         if (value < 0)
 325                 return -EINVAL;
 326         return sprintf(buf, "%d\n", value);
 327 }
 328
 329 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 330                          char *buf)
 331 {
 332         int value = hp_wmi_dock_state();
 333         if (value < 0)
 334                 return -EINVAL;
 335         return sprintf(buf, "%d\n", value);
 336 }
 337
 338 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 339                          char *buf)
 340 {
 341         int value = hp_wmi_tablet_state();
 342         if (value < 0)
 343                 return -EINVAL;
 344         return sprintf(buf, "%d\n", value);
 345 }
 346
 347 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 348                        const char *buf, size_t count)
 349 {
 350         u32 tmp = simple_strtoul(buf, NULL, 10);
 351         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, (char *)&tmp,
 352                                        sizeof(tmp));
 353         if (ret)
 354                 return -EINVAL;
 355
 356         return count;
 357 }
 358
 359 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 360 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 361 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 362 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 363 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 364
 365 static struct key_entry *hp_wmi_get_entry_by_scancode(unsigned int code)
 366 {
 367         struct key_entry *key;
 368
 369         for (key = hp_wmi_keymap; key->type != KE_END; key++)
 370                 if (code == key->code)
 371                         return key;
 372
 373         return NULL;
 374 }
 375
 376 static struct key_entry *hp_wmi_get_entry_by_keycode(unsigned int keycode)
 377 {
 378         struct key_entry *key;
 379
 380         for (key = hp_wmi_keymap; key->type != KE_END; key++)
 381                 if (key->type == KE_KEY && keycode == key->keycode)
 382                         return key;
 383
 384         return NULL;
 385 }
 386
 387 static int hp_wmi_getkeycode(struct input_dev *dev,
 388                              unsigned int scancode, unsigned int *keycode)
 389 {
 390         struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
 391
 392         if (key && key->type == KE_KEY) {
 393                 *keycode = key->keycode;
 394                 return 0;
 395         }
 396
 397         return -EINVAL;
 398 }
 399
 400 static int hp_wmi_setkeycode(struct input_dev *dev,
 401                              unsigned int scancode, unsigned int keycode)
 402 {
 403         struct key_entry *key;
 404         unsigned int old_keycode;
 405
 406         key = hp_wmi_get_entry_by_scancode(scancode);
 407         if (key && key->type == KE_KEY) {
 408                 old_keycode = key->keycode;
 409                 key->keycode = keycode;
 410                 set_bit(keycode, dev->keybit);
 411                 if (!hp_wmi_get_entry_by_keycode(old_keycode))
 412                         clear_bit(old_keycode, dev->keybit);
 413                 return 0;
 414         }
 415
 416         return -EINVAL;
 417 }
 418
 419 static void hp_wmi_notify(u32 value, void *context)
 420 {
 421         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 422         static struct key_entry *key;
 423         union acpi_object *obj;
 424         u32 event_id, event_data;
 425         int key_code, ret;
 426         u32 *location;
 427         acpi_status status;
 428
 429         status = wmi_get_event_data(value, &response);
 430         if (status != AE_OK) {
 431                 printk(KERN_INFO PREFIX "bad event status 0x%x\n", status);
 432                 return;
 433         }
 434
 435         obj = (union acpi_object *)response.pointer;
 436
 437         if (obj || obj->type != ACPI_TYPE_BUFFER) {
 438                 printk(KERN_INFO "hp-wmi: Unknown response received %d\n",
 439                        obj->type);
 440                 kfree(obj);
 441                 return;
 442         }
 443
 444         /*
 445          * Depending on ACPI version the concatenation of id and event data
 446          * inside _WED function will result in a 8 or 16 byte buffer.
 447          */
 448         location = (u32 *)obj->buffer.pointer;
 449         if (obj->buffer.length == 8) {
 450                 event_id = *location;
 451                 event_data = *(location + 1);
 452         } else if (obj->buffer.length == 16) {
 453                 event_id = *location;
 454                 event_data = *(location + 2);
 455         } else {
 456                 printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n",
 457                        obj->buffer.length);
 458                 kfree(obj);
 459                 return;
 460         }
 461         kfree(obj);
 462
 463         switch (event_id) {
 464         case HPWMI_DOCK_EVENT:
 465                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 466                                     hp_wmi_dock_state());
 467                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 468                                     hp_wmi_tablet_state());
 469                 input_sync(hp_wmi_input_dev);
 470                 break;
 471         case HPWMI_PARK_HDD:
 472                 break;
 473         case HPWMI_SMART_ADAPTER:
 474                 break;
 475         case HPWMI_BEZEL_BUTTON:
 476                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 477                                            (char *)&key_code,
 478                                            sizeof(key_code));
 479                 if (ret)
 480                         break;
 481                 key = hp_wmi_get_entry_by_scancode(key_code);
 482                 if (key) {
 483                         switch (key->type) {
 484                         case KE_KEY:
 485                                 input_report_key(hp_wmi_input_dev,
 486                                                  key->keycode, 1);
 487                                 input_sync(hp_wmi_input_dev);
 488                                 input_report_key(hp_wmi_input_dev,
 489                                                  key->keycode, 0);
 490                                 input_sync(hp_wmi_input_dev);
 491                                 break;
 492                         }
 493                 } else
 494                         printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n",
 495                                key_code);
 496                 break;
 497         case HPWMI_WIRELESS:
 498                 if (wifi_rfkill)
 499                         rfkill_set_states(wifi_rfkill,
 500                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 501                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 502                 if (bluetooth_rfkill)
 503                         rfkill_set_states(bluetooth_rfkill,
 504                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 505                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 506                 if (wwan_rfkill)
 507                         rfkill_set_states(wwan_rfkill,
 508                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 509                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 510                 break;
 511         case HPWMI_CPU_BATTERY_THROTTLE:
 512                 printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell"
 513                        " battery event detected\n");
 514                 break;
 515         case HPWMI_LOCK_SWITCH:
 516                 break;
 517         default:
 518                 printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n",
 519                        event_id, event_data);
 520                 break;
 521         }
 522 }
 523
 524 static int __init hp_wmi_input_setup(void)
 525 {
 526         struct key_entry *key;
 527         int err;
 528
 529         hp_wmi_input_dev = input_allocate_device();
 530
 531         hp_wmi_input_dev->name = "HP WMI hotkeys";
 532         hp_wmi_input_dev->phys = "wmi/input0";
 533         hp_wmi_input_dev->id.bustype = BUS_HOST;
 534         hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
 535         hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
 536
 537         for (key = hp_wmi_keymap; key->type != KE_END; key++) {
 538                 switch (key->type) {
 539                 case KE_KEY:
 540                         set_bit(EV_KEY, hp_wmi_input_dev->evbit);
 541                         set_bit(key->keycode, hp_wmi_input_dev->keybit);
 542                         break;
 543                 }
 544         }
 545
 546         set_bit(EV_SW, hp_wmi_input_dev->evbit);
 547         set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 548         set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 549
 550         /* Set initial hardware state */
 551         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
 552         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 553                             hp_wmi_tablet_state());
 554         input_sync(hp_wmi_input_dev);
 555
 556         err = input_register_device(hp_wmi_input_dev);
 557
 558         if (err) {
 559                 input_free_device(hp_wmi_input_dev);
 560                 return err;
 561         }
 562
 563         return 0;
 564 }
 565
 566 static void cleanup_sysfs(struct platform_device *device)
 567 {
 568         device_remove_file(&device->dev, &dev_attr_display);
 569         device_remove_file(&device->dev, &dev_attr_hddtemp);
 570         device_remove_file(&device->dev, &dev_attr_als);
 571         device_remove_file(&device->dev, &dev_attr_dock);
 572         device_remove_file(&device->dev, &dev_attr_tablet);
 573 }
 574
 575 static int __devinit hp_wmi_bios_setup(struct platform_device *device)
 576 {
 577         int err;
 578         int wireless;
 579
 580         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, (char *)&wireless,
 581                                    sizeof(wireless));
 582         if (err)
 583                 return err;
 584
 585         err = device_create_file(&device->dev, &dev_attr_display);
 586         if (err)
 587                 goto add_sysfs_error;
 588         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 589         if (err)
 590                 goto add_sysfs_error;
 591         err = device_create_file(&device->dev, &dev_attr_als);
 592         if (err)
 593                 goto add_sysfs_error;
 594         err = device_create_file(&device->dev, &dev_attr_dock);
 595         if (err)
 596                 goto add_sysfs_error;
 597         err = device_create_file(&device->dev, &dev_attr_tablet);
 598         if (err)
 599                 goto add_sysfs_error;
 600
 601         if (wireless & 0x1) {
 602                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 603                                            RFKILL_TYPE_WLAN,
 604                                            &hp_wmi_rfkill_ops,
 605                                            (void *) HPWMI_WIFI);
 606                 rfkill_init_sw_state(wifi_rfkill,
 607                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 608                 rfkill_set_hw_state(wifi_rfkill,
 609                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 610                 err = rfkill_register(wifi_rfkill);
 611                 if (err)
 612                         goto register_wifi_error;
 613         }
 614
 615         if (wireless & 0x2) {
 616                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 617                                                 RFKILL_TYPE_BLUETOOTH,
 618                                                 &hp_wmi_rfkill_ops,
 619                                                 (void *) HPWMI_BLUETOOTH);
 620                 rfkill_init_sw_state(bluetooth_rfkill,
 621                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 622                 rfkill_set_hw_state(bluetooth_rfkill,
 623                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 624                 err = rfkill_register(bluetooth_rfkill);
 625                 if (err)
 626                         goto register_bluetooth_error;
 627         }
 628
 629         if (wireless & 0x4) {
 630                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 631                                            RFKILL_TYPE_WWAN,
 632                                            &hp_wmi_rfkill_ops,
 633                                            (void *) HPWMI_WWAN);
 634                 rfkill_init_sw_state(wwan_rfkill,
 635                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 636                 rfkill_set_hw_state(wwan_rfkill,
 637                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 638                 err = rfkill_register(wwan_rfkill);
 639                 if (err)
 640                         goto register_wwan_err;
 641         }
 642
 643         return 0;
 644 register_wwan_err:
 645         rfkill_destroy(wwan_rfkill);
 646         if (bluetooth_rfkill)
 647                 rfkill_unregister(bluetooth_rfkill);
 648 register_bluetooth_error:
 649         rfkill_destroy(bluetooth_rfkill);
 650         if (wifi_rfkill)
 651                 rfkill_unregister(wifi_rfkill);
 652 register_wifi_error:
 653         rfkill_destroy(wifi_rfkill);
 654 add_sysfs_error:
 655         cleanup_sysfs(device);
 656         return err;
 657 }
 658
 659 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 660 {
 661         cleanup_sysfs(device);
 662
 663         if (wifi_rfkill) {
 664                 rfkill_unregister(wifi_rfkill);
 665                 rfkill_destroy(wifi_rfkill);
 666         }
 667         if (bluetooth_rfkill) {
 668                 rfkill_unregister(bluetooth_rfkill);
 669                 rfkill_destroy(bluetooth_rfkill);
 670         }
 671         if (wwan_rfkill) {
 672                 rfkill_unregister(wwan_rfkill);
 673                 rfkill_destroy(wwan_rfkill);
 674         }
 675
 676         return 0;
 677 }
 678
 679 static int hp_wmi_resume_handler(struct device *device)
 680 {
 681         /*
 682          * Hardware state may have changed while suspended, so trigger
 683          * input events for the current state. As this is a switch,
 684          * the input layer will only actually pass it on if the state
 685          * changed.
 686          */
 687         if (hp_wmi_input_dev) {
 688                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 689                                     hp_wmi_dock_state());
 690                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 691                                     hp_wmi_tablet_state());
 692                 input_sync(hp_wmi_input_dev);
 693         }
 694
 695         if (wifi_rfkill)
 696                 rfkill_set_states(wifi_rfkill,
 697                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 698                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 699         if (bluetooth_rfkill)
 700                 rfkill_set_states(bluetooth_rfkill,
 701                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 702                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 703         if (wwan_rfkill)
 704                 rfkill_set_states(wwan_rfkill,
 705                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 706                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 707
 708         return 0;
 709 }
 710
 711 static int __init hp_wmi_init(void)
 712 {
 713         int err;
 714
 715         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
 716                 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
 717                                                  hp_wmi_notify, NULL);
 718                 if (ACPI_SUCCESS(err))
 719                         hp_wmi_input_setup();
 720         }
 721
 722         if (wmi_has_guid(HPWMI_BIOS_GUID)) {
 723                 err = platform_driver_register(&hp_wmi_driver);
 724                 if (err)
 725                         return 0;
 726                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
 727                 if (!hp_wmi_platform_dev) {
 728                         platform_driver_unregister(&hp_wmi_driver);
 729                         return 0;
 730                 }
 731                 platform_device_add(hp_wmi_platform_dev);
 732         }
 733
 734         return 0;
 735 }
 736
 737 static void __exit hp_wmi_exit(void)
 738 {
 739         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
 740                 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 741                 input_unregister_device(hp_wmi_input_dev);
 742         }
 743         if (hp_wmi_platform_dev) {
 744                 platform_device_del(hp_wmi_platform_dev);
 745                 platform_driver_unregister(&hp_wmi_driver);
 746         }
 747 }
 748
 749 module_init(hp_wmi_init);
 750 module_exit(hp_wmi_exit);