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 };
  90
  91 enum hp_return_value {
  92         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
  93         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
  94         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
  95         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
  96 };
  97
  98 static const 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  * insize:      Size of input buffer
 139  * outsize:     Size of output 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, 1, 128)
 151  */
 152 static int hp_wmi_perform_query(int query, int write, void *buffer,
 153                                 int insize, int outsize)
 154 {
 155         struct bios_return *bios_return;
 156         int actual_outsize;
 157         union acpi_object *obj;
 158         struct bios_args args = {
 159                 .signature = 0x55434553,
 160                 .command = write ? 0x2 : 0x1,
 161                 .commandtype = query,
 162                 .datasize = insize,
 163                 .data = 0,
 164         };
 165         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 166         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 167
 168         if (WARN_ON(insize > sizeof(args.data)))
 169                 return -EINVAL;
 170         memcpy(&args.data, buffer, insize);
 171
 172         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
 173
 174         obj = output.pointer;
 175
 176         if (!obj)
 177                 return -EINVAL;
 178         else if (obj->type != ACPI_TYPE_BUFFER) {
 179                 kfree(obj);
 180                 return -EINVAL;
 181         }
 182
 183         bios_return = (struct bios_return *)obj->buffer.pointer;
 184
 185         if (bios_return->return_code) {
 186                 if (bios_return->return_code != HPWMI_RET_UNKNOWN_CMDTYPE)
 187                         printk(KERN_WARNING PREFIX "query 0x%x returned "
 188                                                    "error 0x%x\n",
 189                                query, bios_return->return_code);
 190                 kfree(obj);
 191                 return bios_return->return_code;
 192         }
 193
 194         if (!outsize) {
 195                 /* ignore output data */
 196                 kfree(obj);
 197                 return 0;
 198         }
 199
 200         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 201         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 202         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 203         kfree(obj);
 204         return 0;
 205 }
 206
 207 static int hp_wmi_display_state(void)
 208 {
 209         int state = 0;
 210         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
 211                                        sizeof(state), sizeof(state));
 212         if (ret)
 213                 return -EINVAL;
 214         return state;
 215 }
 216
 217 static int hp_wmi_hddtemp_state(void)
 218 {
 219         int state = 0;
 220         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
 221                                        sizeof(state), sizeof(state));
 222         if (ret)
 223                 return -EINVAL;
 224         return state;
 225 }
 226
 227 static int hp_wmi_als_state(void)
 228 {
 229         int state = 0;
 230         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
 231                                        sizeof(state), sizeof(state));
 232         if (ret)
 233                 return -EINVAL;
 234         return state;
 235 }
 236
 237 static int hp_wmi_dock_state(void)
 238 {
 239         int state = 0;
 240         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 241                                        sizeof(state), sizeof(state));
 242
 243         if (ret)
 244                 return -EINVAL;
 245
 246         return state & 0x1;
 247 }
 248
 249 static int hp_wmi_tablet_state(void)
 250 {
 251         int state = 0;
 252         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 253                                        sizeof(state), sizeof(state));
 254         if (ret)
 255                 return ret;
 256
 257         return (state & 0x4) ? 1 : 0;
 258 }
 259
 260 static int hp_wmi_set_block(void *data, bool blocked)
 261 {
 262         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 263         int query = BIT(r + 8) | ((!blocked) << r);
 264         int ret;
 265
 266         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 267                                    &query, sizeof(query), 0);
 268         if (ret)
 269                 return -EINVAL;
 270         return 0;
 271 }
 272
 273 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 274         .set_block = hp_wmi_set_block,
 275 };
 276
 277 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 278 {
 279         int wireless = 0;
 280         int mask;
 281         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 282                              &wireless, sizeof(wireless),
 283                              sizeof(wireless));
 284         /* TBD: Pass error */
 285
 286         mask = 0x200 << (r * 8);
 287
 288         if (wireless & mask)
 289                 return false;
 290         else
 291                 return true;
 292 }
 293
 294 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 295 {
 296         int wireless = 0;
 297         int mask;
 298         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 299                              &wireless, sizeof(wireless),
 300                              sizeof(wireless));
 301         /* TBD: Pass error */
 302
 303         mask = 0x800 << (r * 8);
 304
 305         if (wireless & mask)
 306                 return false;
 307         else
 308                 return true;
 309 }
 310
 311 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 312                             char *buf)
 313 {
 314         int value = hp_wmi_display_state();
 315         if (value < 0)
 316                 return -EINVAL;
 317         return sprintf(buf, "%d\n", value);
 318 }
 319
 320 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 321                             char *buf)
 322 {
 323         int value = hp_wmi_hddtemp_state();
 324         if (value < 0)
 325                 return -EINVAL;
 326         return sprintf(buf, "%d\n", value);
 327 }
 328
 329 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 330                         char *buf)
 331 {
 332         int value = hp_wmi_als_state();
 333         if (value < 0)
 334                 return -EINVAL;
 335         return sprintf(buf, "%d\n", value);
 336 }
 337
 338 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 339                          char *buf)
 340 {
 341         int value = hp_wmi_dock_state();
 342         if (value < 0)
 343                 return -EINVAL;
 344         return sprintf(buf, "%d\n", value);
 345 }
 346
 347 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 348                          char *buf)
 349 {
 350         int value = hp_wmi_tablet_state();
 351         if (value < 0)
 352                 return -EINVAL;
 353         return sprintf(buf, "%d\n", value);
 354 }
 355
 356 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 357                        const char *buf, size_t count)
 358 {
 359         u32 tmp = simple_strtoul(buf, NULL, 10);
 360         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
 361                                        sizeof(tmp), sizeof(tmp));
 362         if (ret)
 363                 return -EINVAL;
 364
 365         return count;
 366 }
 367
 368 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 369 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 370 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 371 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 372 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 373
 374 static void hp_wmi_notify(u32 value, void *context)
 375 {
 376         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 377         union acpi_object *obj;
 378         u32 event_id, event_data;
 379         int key_code = 0, ret;
 380         u32 *location;
 381         acpi_status status;
 382
 383         status = wmi_get_event_data(value, &response);
 384         if (status != AE_OK) {
 385                 printk(KERN_INFO PREFIX "bad event status 0x%x\n", status);
 386                 return;
 387         }
 388
 389         obj = (union acpi_object *)response.pointer;
 390
 391         if (!obj)
 392                 return;
 393         if (obj->type != ACPI_TYPE_BUFFER) {
 394                 printk(KERN_INFO "hp-wmi: Unknown response received %d\n",
 395                        obj->type);
 396                 kfree(obj);
 397                 return;
 398         }
 399
 400         /*
 401          * Depending on ACPI version the concatenation of id and event data
 402          * inside _WED function will result in a 8 or 16 byte buffer.
 403          */
 404         location = (u32 *)obj->buffer.pointer;
 405         if (obj->buffer.length == 8) {
 406                 event_id = *location;
 407                 event_data = *(location + 1);
 408         } else if (obj->buffer.length == 16) {
 409                 event_id = *location;
 410                 event_data = *(location + 2);
 411         } else {
 412                 printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n",
 413                        obj->buffer.length);
 414                 kfree(obj);
 415                 return;
 416         }
 417         kfree(obj);
 418
 419         switch (event_id) {
 420         case HPWMI_DOCK_EVENT:
 421                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 422                                     hp_wmi_dock_state());
 423                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 424                                     hp_wmi_tablet_state());
 425                 input_sync(hp_wmi_input_dev);
 426                 break;
 427         case HPWMI_PARK_HDD:
 428                 break;
 429         case HPWMI_SMART_ADAPTER:
 430                 break;
 431         case HPWMI_BEZEL_BUTTON:
 432                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 433                                            &key_code,
 434                                            sizeof(key_code),
 435                                            sizeof(key_code));
 436                 if (ret)
 437                         break;
 438
 439                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 440                                                 key_code, 1, true))
 441                         printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n",
 442                                key_code);
 443                 break;
 444         case HPWMI_WIRELESS:
 445                 if (wifi_rfkill)
 446                         rfkill_set_states(wifi_rfkill,
 447                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 448                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 449                 if (bluetooth_rfkill)
 450                         rfkill_set_states(bluetooth_rfkill,
 451                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 452                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 453                 if (wwan_rfkill)
 454                         rfkill_set_states(wwan_rfkill,
 455                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 456                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 457                 break;
 458         case HPWMI_CPU_BATTERY_THROTTLE:
 459                 printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell"
 460                        " battery event detected\n");
 461                 break;
 462         case HPWMI_LOCK_SWITCH:
 463                 break;
 464         default:
 465                 printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n",
 466                        event_id, event_data);
 467                 break;
 468         }
 469 }
 470
 471 static int __init hp_wmi_input_setup(void)
 472 {
 473         acpi_status status;
 474         int err;
 475
 476         hp_wmi_input_dev = input_allocate_device();
 477         if (!hp_wmi_input_dev)
 478                 return -ENOMEM;
 479
 480         hp_wmi_input_dev->name = "HP WMI hotkeys";
 481         hp_wmi_input_dev->phys = "wmi/input0";
 482         hp_wmi_input_dev->id.bustype = BUS_HOST;
 483
 484         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 485         __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 486         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 487
 488         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 489         if (err)
 490                 goto err_free_dev;
 491
 492         /* Set initial hardware state */
 493         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
 494         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 495                             hp_wmi_tablet_state());
 496         input_sync(hp_wmi_input_dev);
 497
 498         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 499         if (ACPI_FAILURE(status)) {
 500                 err = -EIO;
 501                 goto err_free_keymap;
 502         }
 503
 504         err = input_register_device(hp_wmi_input_dev);
 505         if (err)
 506                 goto err_uninstall_notifier;
 507
 508         return 0;
 509
 510  err_uninstall_notifier:
 511         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 512  err_free_keymap:
 513         sparse_keymap_free(hp_wmi_input_dev);
 514  err_free_dev:
 515         input_free_device(hp_wmi_input_dev);
 516         return err;
 517 }
 518
 519 static void hp_wmi_input_destroy(void)
 520 {
 521         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 522         sparse_keymap_free(hp_wmi_input_dev);
 523         input_unregister_device(hp_wmi_input_dev);
 524 }
 525
 526 static void cleanup_sysfs(struct platform_device *device)
 527 {
 528         device_remove_file(&device->dev, &dev_attr_display);
 529         device_remove_file(&device->dev, &dev_attr_hddtemp);
 530         device_remove_file(&device->dev, &dev_attr_als);
 531         device_remove_file(&device->dev, &dev_attr_dock);
 532         device_remove_file(&device->dev, &dev_attr_tablet);
 533 }
 534
 535 static int __devinit hp_wmi_rfkill_setup(struct platform_device *device)
 536 {
 537         int err;
 538         int wireless = 0;
 539
 540         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
 541                                    sizeof(wireless), sizeof(wireless));
 542         if (err)
 543                 return err;
 544
 545         if (wireless & 0x1) {
 546                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 547                                            RFKILL_TYPE_WLAN,
 548                                            &hp_wmi_rfkill_ops,
 549                                            (void *) HPWMI_WIFI);
 550                 rfkill_init_sw_state(wifi_rfkill,
 551                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 552                 rfkill_set_hw_state(wifi_rfkill,
 553                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 554                 err = rfkill_register(wifi_rfkill);
 555                 if (err)
 556                         goto register_wifi_error;
 557         }
 558
 559         if (wireless & 0x2) {
 560                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 561                                                 RFKILL_TYPE_BLUETOOTH,
 562                                                 &hp_wmi_rfkill_ops,
 563                                                 (void *) HPWMI_BLUETOOTH);
 564                 rfkill_init_sw_state(bluetooth_rfkill,
 565                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 566                 rfkill_set_hw_state(bluetooth_rfkill,
 567                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 568                 err = rfkill_register(bluetooth_rfkill);
 569                 if (err)
 570                         goto register_bluetooth_error;
 571         }
 572
 573         if (wireless & 0x4) {
 574                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 575                                            RFKILL_TYPE_WWAN,
 576                                            &hp_wmi_rfkill_ops,
 577                                            (void *) HPWMI_WWAN);
 578                 rfkill_init_sw_state(wwan_rfkill,
 579                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 580                 rfkill_set_hw_state(wwan_rfkill,
 581                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 582                 err = rfkill_register(wwan_rfkill);
 583                 if (err)
 584                         goto register_wwan_err;
 585         }
 586
 587         return 0;
 588 register_wwan_err:
 589         rfkill_destroy(wwan_rfkill);
 590         wwan_rfkill = NULL;
 591         if (bluetooth_rfkill)
 592                 rfkill_unregister(bluetooth_rfkill);
 593 register_bluetooth_error:
 594         rfkill_destroy(bluetooth_rfkill);
 595         bluetooth_rfkill = NULL;
 596         if (wifi_rfkill)
 597                 rfkill_unregister(wifi_rfkill);
 598 register_wifi_error:
 599         rfkill_destroy(wifi_rfkill);
 600         wifi_rfkill = NULL;
 601         return err;
 602 }
 603
 604 static int __devinit hp_wmi_bios_setup(struct platform_device *device)
 605 {
 606         int err;
 607
 608         /* clear detected rfkill devices */
 609         wifi_rfkill = NULL;
 610         bluetooth_rfkill = NULL;
 611         wwan_rfkill = NULL;
 612
 613         hp_wmi_rfkill_setup(device);
 614
 615         err = device_create_file(&device->dev, &dev_attr_display);
 616         if (err)
 617                 goto add_sysfs_error;
 618         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 619         if (err)
 620                 goto add_sysfs_error;
 621         err = device_create_file(&device->dev, &dev_attr_als);
 622         if (err)
 623                 goto add_sysfs_error;
 624         err = device_create_file(&device->dev, &dev_attr_dock);
 625         if (err)
 626                 goto add_sysfs_error;
 627         err = device_create_file(&device->dev, &dev_attr_tablet);
 628         if (err)
 629                 goto add_sysfs_error;
 630         return 0;
 631
 632 add_sysfs_error:
 633         cleanup_sysfs(device);
 634         return err;
 635 }
 636
 637 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 638 {
 639         cleanup_sysfs(device);
 640
 641         if (wifi_rfkill) {
 642                 rfkill_unregister(wifi_rfkill);
 643                 rfkill_destroy(wifi_rfkill);
 644         }
 645         if (bluetooth_rfkill) {
 646                 rfkill_unregister(bluetooth_rfkill);
 647                 rfkill_destroy(bluetooth_rfkill);
 648         }
 649         if (wwan_rfkill) {
 650                 rfkill_unregister(wwan_rfkill);
 651                 rfkill_destroy(wwan_rfkill);
 652         }
 653
 654         return 0;
 655 }
 656
 657 static int hp_wmi_resume_handler(struct device *device)
 658 {
 659         /*
 660          * Hardware state may have changed while suspended, so trigger
 661          * input events for the current state. As this is a switch,
 662          * the input layer will only actually pass it on if the state
 663          * changed.
 664          */
 665         if (hp_wmi_input_dev) {
 666                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 667                                     hp_wmi_dock_state());
 668                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 669                                     hp_wmi_tablet_state());
 670                 input_sync(hp_wmi_input_dev);
 671         }
 672
 673         if (wifi_rfkill)
 674                 rfkill_set_states(wifi_rfkill,
 675                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 676                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 677         if (bluetooth_rfkill)
 678                 rfkill_set_states(bluetooth_rfkill,
 679                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 680                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 681         if (wwan_rfkill)
 682                 rfkill_set_states(wwan_rfkill,
 683                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 684                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 685
 686         return 0;
 687 }
 688
 689 static int __init hp_wmi_init(void)
 690 {
 691         int err;
 692         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
 693         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
 694
 695         if (event_capable) {
 696                 err = hp_wmi_input_setup();
 697                 if (err)
 698                         return err;
 699         }
 700
 701         if (bios_capable) {
 702                 err = platform_driver_register(&hp_wmi_driver);
 703                 if (err)
 704                         goto err_driver_reg;
 705                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
 706                 if (!hp_wmi_platform_dev) {
 707                         err = -ENOMEM;
 708                         goto err_device_alloc;
 709                 }
 710                 err = platform_device_add(hp_wmi_platform_dev);
 711                 if (err)
 712                         goto err_device_add;
 713         }
 714
 715         if (!bios_capable && !event_capable)
 716                 return -ENODEV;
 717
 718         return 0;
 719
 720 err_device_add:
 721         platform_device_put(hp_wmi_platform_dev);
 722 err_device_alloc:
 723         platform_driver_unregister(&hp_wmi_driver);
 724 err_driver_reg:
 725         if (event_capable)
 726                 hp_wmi_input_destroy();
 727
 728         return err;
 729 }
 730
 731 static void __exit hp_wmi_exit(void)
 732 {
 733         if (wmi_has_guid(HPWMI_EVENT_GUID))
 734                 hp_wmi_input_destroy();
 735
 736         if (hp_wmi_platform_dev) {
 737                 platform_device_unregister(hp_wmi_platform_dev);
 738                 platform_driver_unregister(&hp_wmi_driver);
 739         }
 740 }
 741
 742 module_init(hp_wmi_init);
 743 module_exit(hp_wmi_exit);