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