drivers/platform/x86/hp-wmi.c

   1 /*
   2  * HP WMI hotkeys
   3  *
   4  * Copyright (C) 2008 Red Hat <mjg@redhat.com>
   5  * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
   6  *
   7  * Portions based on wistron_btns.c:
   8  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
   9  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  10  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/types.h>
  32 #include <linux/input.h>
  33 #include <linux/input/sparse-keymap.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/acpi.h>
  36 #include <linux/rfkill.h>
  37 #include <linux/string.h>
  38
  39 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
  40 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
  41 MODULE_LICENSE("GPL");
  42
  43 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
  44 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
  45
  46 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  47 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
  48
  49 #define HPWMI_DISPLAY_QUERY 0x1
  50 #define HPWMI_HDDTEMP_QUERY 0x2
  51 #define HPWMI_ALS_QUERY 0x3
  52 #define HPWMI_HARDWARE_QUERY 0x4
  53 #define HPWMI_WIRELESS_QUERY 0x5
  54 #define HPWMI_HOTKEY_QUERY 0xc
  55 #define HPWMI_WIRELESS2_QUERY 0x1b
  56
  57 #define PREFIX "HP WMI: "
  58 #define UNIMP "Unimplemented "
  59
  60 enum hp_wmi_radio {
  61         HPWMI_WIFI = 0,
  62         HPWMI_BLUETOOTH = 1,
  63         HPWMI_WWAN = 2,
  64 };
  65
  66 enum hp_wmi_event_ids {
  67         HPWMI_DOCK_EVENT = 1,
  68         HPWMI_PARK_HDD = 2,
  69         HPWMI_SMART_ADAPTER = 3,
  70         HPWMI_BEZEL_BUTTON = 4,
  71         HPWMI_WIRELESS = 5,
  72         HPWMI_CPU_BATTERY_THROTTLE = 6,
  73         HPWMI_LOCK_SWITCH = 7,
  74 };
  75
  76 static int __devinit hp_wmi_bios_setup(struct platform_device *device);
  77 static int __exit hp_wmi_bios_remove(struct platform_device *device);
  78 static int hp_wmi_resume_handler(struct device *device);
  79
  80 struct bios_args {
  81         u32 signature;
  82         u32 command;
  83         u32 commandtype;
  84         u32 datasize;
  85         u32 data;
  86 };
  87
  88 struct bios_return {
  89         u32 sigpass;
  90         u32 return_code;
  91 };
  92
  93 enum hp_return_value {
  94         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
  95         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
  96         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
  97         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
  98 };
  99
 100 enum hp_wireless2_bits {
 101         HPWMI_POWER_STATE       = 0x01,
 102         HPWMI_POWER_SOFT        = 0x02,
 103         HPWMI_POWER_BIOS        = 0x04,
 104         HPWMI_POWER_HARD        = 0x08,
 105 };
 106
 107 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
 108                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
 109 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 110
 111 struct bios_rfkill2_device_state {
 112         u8 radio_type;
 113         u8 bus_type;
 114         u16 vendor_id;
 115         u16 product_id;
 116         u16 subsys_vendor_id;
 117         u16 subsys_product_id;
 118         u8 rfkill_id;
 119         u8 power;
 120         u8 unknown[4];
 121 };
 122
 123 /* 7 devices fit into the 128 byte buffer */
 124 #define HPWMI_MAX_RFKILL2_DEVICES       7
 125
 126 struct bios_rfkill2_state {
 127         u8 unknown[7];
 128         u8 count;
 129         u8 pad[8];
 130         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 131 };
 132
 133 static const struct key_entry hp_wmi_keymap[] = {
 134         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 135         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 136         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 137         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 138         { KE_KEY, 0x2142, { KEY_MEDIA } },
 139         { KE_KEY, 0x213b, { KEY_INFO } },
 140         { KE_KEY, 0x2169, { KEY_DIRECTION } },
 141         { KE_KEY, 0x231b, { KEY_HELP } },
 142         { KE_END, 0 }
 143 };
 144
 145 static struct input_dev *hp_wmi_input_dev;
 146 static struct platform_device *hp_wmi_platform_dev;
 147
 148 static struct rfkill *wifi_rfkill;
 149 static struct rfkill *bluetooth_rfkill;
 150 static struct rfkill *wwan_rfkill;
 151
 152 struct rfkill2_device {
 153         u8 id;
 154         int num;
 155         struct rfkill *rfkill;
 156 };
 157
 158 static int rfkill2_count;
 159 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 160
 161 static const struct dev_pm_ops hp_wmi_pm_ops = {
 162         .resume  = hp_wmi_resume_handler,
 163         .restore  = hp_wmi_resume_handler,
 164 };
 165
 166 static struct platform_driver hp_wmi_driver = {
 167         .driver = {
 168                 .name = "hp-wmi",
 169                 .owner = THIS_MODULE,
 170                 .pm = &hp_wmi_pm_ops,
 171         },
 172         .probe = hp_wmi_bios_setup,
 173         .remove = hp_wmi_bios_remove,
 174 };
 175
 176 /*
 177  * hp_wmi_perform_query
 178  *
 179  * query:       The commandtype -> What should be queried
 180  * write:       The command -> 0 read, 1 write, 3 ODM specific
 181  * buffer:      Buffer used as input and/or output
 182  * insize:      Size of input buffer
 183  * outsize:     Size of output buffer
 184  *
 185  * returns zero on success
 186  *         an HP WMI query specific error code (which is positive)
 187  *         -EINVAL if the query was not successful at all
 188  *         -EINVAL if the output buffer size exceeds buffersize
 189  *
 190  * Note: The buffersize must at least be the maximum of the input and output
 191  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
 192  *       and 128 byte output. The caller would do:
 193  *       buffer = kzalloc(128, GFP_KERNEL);
 194  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
 195  */
 196 static int hp_wmi_perform_query(int query, int write, void *buffer,
 197                                 int insize, int outsize)
 198 {
 199         struct bios_return *bios_return;
 200         int actual_outsize;
 201         union acpi_object *obj;
 202         struct bios_args args = {
 203                 .signature = 0x55434553,
 204                 .command = write ? 0x2 : 0x1,
 205                 .commandtype = query,
 206                 .datasize = insize,
 207                 .data = 0,
 208         };
 209         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 210         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 211
 212         if (WARN_ON(insize > sizeof(args.data)))
 213                 return -EINVAL;
 214         memcpy(&args.data, buffer, insize);
 215
 216         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
 217
 218         obj = output.pointer;
 219
 220         if (!obj)
 221                 return -EINVAL;
 222         else if (obj->type != ACPI_TYPE_BUFFER) {
 223                 kfree(obj);
 224                 return -EINVAL;
 225         }
 226
 227         bios_return = (struct bios_return *)obj->buffer.pointer;
 228
 229         if (bios_return->return_code) {
 230                 if (bios_return->return_code != HPWMI_RET_UNKNOWN_CMDTYPE)
 231                         printk(KERN_WARNING PREFIX "query 0x%x returned "
 232                                                    "error 0x%x\n",
 233                                query, bios_return->return_code);
 234                 kfree(obj);
 235                 return bios_return->return_code;
 236         }
 237
 238         if (!outsize) {
 239                 /* ignore output data */
 240                 kfree(obj);
 241                 return 0;
 242         }
 243
 244         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 245         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 246         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 247         kfree(obj);
 248         return 0;
 249 }
 250
 251 static int hp_wmi_display_state(void)
 252 {
 253         int state = 0;
 254         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
 255                                        sizeof(state), sizeof(state));
 256         if (ret)
 257                 return -EINVAL;
 258         return state;
 259 }
 260
 261 static int hp_wmi_hddtemp_state(void)
 262 {
 263         int state = 0;
 264         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
 265                                        sizeof(state), sizeof(state));
 266         if (ret)
 267                 return -EINVAL;
 268         return state;
 269 }
 270
 271 static int hp_wmi_als_state(void)
 272 {
 273         int state = 0;
 274         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
 275                                        sizeof(state), sizeof(state));
 276         if (ret)
 277                 return -EINVAL;
 278         return state;
 279 }
 280
 281 static int hp_wmi_dock_state(void)
 282 {
 283         int state = 0;
 284         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 285                                        sizeof(state), sizeof(state));
 286
 287         if (ret)
 288                 return -EINVAL;
 289
 290         return state & 0x1;
 291 }
 292
 293 static int hp_wmi_tablet_state(void)
 294 {
 295         int state = 0;
 296         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 297                                        sizeof(state), sizeof(state));
 298         if (ret)
 299                 return ret;
 300
 301         return (state & 0x4) ? 1 : 0;
 302 }
 303
 304 static int hp_wmi_set_block(void *data, bool blocked)
 305 {
 306         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 307         int query = BIT(r + 8) | ((!blocked) << r);
 308         int ret;
 309
 310         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 311                                    &query, sizeof(query), 0);
 312         if (ret)
 313                 return -EINVAL;
 314         return 0;
 315 }
 316
 317 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 318         .set_block = hp_wmi_set_block,
 319 };
 320
 321 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 322 {
 323         int wireless = 0;
 324         int mask;
 325         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 326                              &wireless, sizeof(wireless),
 327                              sizeof(wireless));
 328         /* TBD: Pass error */
 329
 330         mask = 0x200 << (r * 8);
 331
 332         if (wireless & mask)
 333                 return false;
 334         else
 335                 return true;
 336 }
 337
 338 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 339 {
 340         int wireless = 0;
 341         int mask;
 342         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 343                              &wireless, sizeof(wireless),
 344                              sizeof(wireless));
 345         /* TBD: Pass error */
 346
 347         mask = 0x800 << (r * 8);
 348
 349         if (wireless & mask)
 350                 return false;
 351         else
 352                 return true;
 353 }
 354
 355 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 356 {
 357         int rfkill_id = (int)(long)data;
 358         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 359
 360         if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
 361                                    buffer, sizeof(buffer), 0))
 362                 return -EINVAL;
 363         return 0;
 364 }
 365
 366 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 367         .set_block = hp_wmi_rfkill2_set_block,
 368 };
 369
 370 static int hp_wmi_rfkill2_refresh(void)
 371 {
 372         int err, i;
 373         struct bios_rfkill2_state state;
 374
 375         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 376                                    0, sizeof(state));
 377         if (err)
 378                 return err;
 379
 380         for (i = 0; i < rfkill2_count; i++) {
 381                 int num = rfkill2[i].num;
 382                 struct bios_rfkill2_device_state *devstate;
 383                 devstate = &state.device[num];
 384
 385                 if (num >= state.count ||
 386                     devstate->rfkill_id != rfkill2[i].id) {
 387                         printk(KERN_WARNING PREFIX "power configuration of "
 388                                "the wireless devices unexpectedly changed\n");
 389                         continue;
 390                 }
 391
 392                 rfkill_set_states(rfkill2[i].rfkill,
 393                                   IS_SWBLOCKED(devstate->power),
 394                                   IS_HWBLOCKED(devstate->power));
 395         }
 396
 397         return 0;
 398 }
 399
 400 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 401                             char *buf)
 402 {
 403         int value = hp_wmi_display_state();
 404         if (value < 0)
 405                 return -EINVAL;
 406         return sprintf(buf, "%d\n", value);
 407 }
 408
 409 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 410                             char *buf)
 411 {
 412         int value = hp_wmi_hddtemp_state();
 413         if (value < 0)
 414                 return -EINVAL;
 415         return sprintf(buf, "%d\n", value);
 416 }
 417
 418 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 419                         char *buf)
 420 {
 421         int value = hp_wmi_als_state();
 422         if (value < 0)
 423                 return -EINVAL;
 424         return sprintf(buf, "%d\n", value);
 425 }
 426
 427 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 428                          char *buf)
 429 {
 430         int value = hp_wmi_dock_state();
 431         if (value < 0)
 432                 return -EINVAL;
 433         return sprintf(buf, "%d\n", value);
 434 }
 435
 436 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 437                          char *buf)
 438 {
 439         int value = hp_wmi_tablet_state();
 440         if (value < 0)
 441                 return -EINVAL;
 442         return sprintf(buf, "%d\n", value);
 443 }
 444
 445 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 446                        const char *buf, size_t count)
 447 {
 448         u32 tmp = simple_strtoul(buf, NULL, 10);
 449         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
 450                                        sizeof(tmp), sizeof(tmp));
 451         if (ret)
 452                 return -EINVAL;
 453
 454         return count;
 455 }
 456
 457 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 458 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 459 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 460 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 461 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 462
 463 static void hp_wmi_notify(u32 value, void *context)
 464 {
 465         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 466         union acpi_object *obj;
 467         u32 event_id, event_data;
 468         int key_code = 0, ret;
 469         u32 *location;
 470         acpi_status status;
 471
 472         status = wmi_get_event_data(value, &response);
 473         if (status != AE_OK) {
 474                 printk(KERN_INFO PREFIX "bad event status 0x%x\n", status);
 475                 return;
 476         }
 477
 478         obj = (union acpi_object *)response.pointer;
 479
 480         if (!obj)
 481                 return;
 482         if (obj->type != ACPI_TYPE_BUFFER) {
 483                 printk(KERN_INFO "hp-wmi: Unknown response received %d\n",
 484                        obj->type);
 485                 kfree(obj);
 486                 return;
 487         }
 488
 489         /*
 490          * Depending on ACPI version the concatenation of id and event data
 491          * inside _WED function will result in a 8 or 16 byte buffer.
 492          */
 493         location = (u32 *)obj->buffer.pointer;
 494         if (obj->buffer.length == 8) {
 495                 event_id = *location;
 496                 event_data = *(location + 1);
 497         } else if (obj->buffer.length == 16) {
 498                 event_id = *location;
 499                 event_data = *(location + 2);
 500         } else {
 501                 printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n",
 502                        obj->buffer.length);
 503                 kfree(obj);
 504                 return;
 505         }
 506         kfree(obj);
 507
 508         switch (event_id) {
 509         case HPWMI_DOCK_EVENT:
 510                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 511                                     hp_wmi_dock_state());
 512                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 513                                     hp_wmi_tablet_state());
 514                 input_sync(hp_wmi_input_dev);
 515                 break;
 516         case HPWMI_PARK_HDD:
 517                 break;
 518         case HPWMI_SMART_ADAPTER:
 519                 break;
 520         case HPWMI_BEZEL_BUTTON:
 521                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 522                                            &key_code,
 523                                            sizeof(key_code),
 524                                            sizeof(key_code));
 525                 if (ret)
 526                         break;
 527
 528                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 529                                                 key_code, 1, true))
 530                         printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n",
 531                                key_code);
 532                 break;
 533         case HPWMI_WIRELESS:
 534                 if (rfkill2_count) {
 535                         hp_wmi_rfkill2_refresh();
 536                         break;
 537                 }
 538
 539                 if (wifi_rfkill)
 540                         rfkill_set_states(wifi_rfkill,
 541                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 542                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 543                 if (bluetooth_rfkill)
 544                         rfkill_set_states(bluetooth_rfkill,
 545                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 546                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 547                 if (wwan_rfkill)
 548                         rfkill_set_states(wwan_rfkill,
 549                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 550                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 551                 break;
 552         case HPWMI_CPU_BATTERY_THROTTLE:
 553                 printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell"
 554                        " battery event detected\n");
 555                 break;
 556         case HPWMI_LOCK_SWITCH:
 557                 break;
 558         default:
 559                 printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n",
 560                        event_id, event_data);
 561                 break;
 562         }
 563 }
 564
 565 static int __init hp_wmi_input_setup(void)
 566 {
 567         acpi_status status;
 568         int err;
 569
 570         hp_wmi_input_dev = input_allocate_device();
 571         if (!hp_wmi_input_dev)
 572                 return -ENOMEM;
 573
 574         hp_wmi_input_dev->name = "HP WMI hotkeys";
 575         hp_wmi_input_dev->phys = "wmi/input0";
 576         hp_wmi_input_dev->id.bustype = BUS_HOST;
 577
 578         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 579         __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 580         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 581
 582         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 583         if (err)
 584                 goto err_free_dev;
 585
 586         /* Set initial hardware state */
 587         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
 588         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 589                             hp_wmi_tablet_state());
 590         input_sync(hp_wmi_input_dev);
 591
 592         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 593         if (ACPI_FAILURE(status)) {
 594                 err = -EIO;
 595                 goto err_free_keymap;
 596         }
 597
 598         err = input_register_device(hp_wmi_input_dev);
 599         if (err)
 600                 goto err_uninstall_notifier;
 601
 602         return 0;
 603
 604  err_uninstall_notifier:
 605         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 606  err_free_keymap:
 607         sparse_keymap_free(hp_wmi_input_dev);
 608  err_free_dev:
 609         input_free_device(hp_wmi_input_dev);
 610         return err;
 611 }
 612
 613 static void hp_wmi_input_destroy(void)
 614 {
 615         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 616         sparse_keymap_free(hp_wmi_input_dev);
 617         input_unregister_device(hp_wmi_input_dev);
 618 }
 619
 620 static void cleanup_sysfs(struct platform_device *device)
 621 {
 622         device_remove_file(&device->dev, &dev_attr_display);
 623         device_remove_file(&device->dev, &dev_attr_hddtemp);
 624         device_remove_file(&device->dev, &dev_attr_als);
 625         device_remove_file(&device->dev, &dev_attr_dock);
 626         device_remove_file(&device->dev, &dev_attr_tablet);
 627 }
 628
 629 static int __devinit hp_wmi_rfkill_setup(struct platform_device *device)
 630 {
 631         int err;
 632         int wireless = 0;
 633
 634         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
 635                                    sizeof(wireless), sizeof(wireless));
 636         if (err)
 637                 return err;
 638
 639         if (wireless & 0x1) {
 640                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 641                                            RFKILL_TYPE_WLAN,
 642                                            &hp_wmi_rfkill_ops,
 643                                            (void *) HPWMI_WIFI);
 644                 rfkill_init_sw_state(wifi_rfkill,
 645                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 646                 rfkill_set_hw_state(wifi_rfkill,
 647                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 648                 err = rfkill_register(wifi_rfkill);
 649                 if (err)
 650                         goto register_wifi_error;
 651         }
 652
 653         if (wireless & 0x2) {
 654                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 655                                                 RFKILL_TYPE_BLUETOOTH,
 656                                                 &hp_wmi_rfkill_ops,
 657                                                 (void *) HPWMI_BLUETOOTH);
 658                 rfkill_init_sw_state(bluetooth_rfkill,
 659                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 660                 rfkill_set_hw_state(bluetooth_rfkill,
 661                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 662                 err = rfkill_register(bluetooth_rfkill);
 663                 if (err)
 664                         goto register_bluetooth_error;
 665         }
 666
 667         if (wireless & 0x4) {
 668                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 669                                            RFKILL_TYPE_WWAN,
 670                                            &hp_wmi_rfkill_ops,
 671                                            (void *) HPWMI_WWAN);
 672                 rfkill_init_sw_state(wwan_rfkill,
 673                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 674                 rfkill_set_hw_state(wwan_rfkill,
 675                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 676                 err = rfkill_register(wwan_rfkill);
 677                 if (err)
 678                         goto register_wwan_err;
 679         }
 680
 681         return 0;
 682 register_wwan_err:
 683         rfkill_destroy(wwan_rfkill);
 684         wwan_rfkill = NULL;
 685         if (bluetooth_rfkill)
 686                 rfkill_unregister(bluetooth_rfkill);
 687 register_bluetooth_error:
 688         rfkill_destroy(bluetooth_rfkill);
 689         bluetooth_rfkill = NULL;
 690         if (wifi_rfkill)
 691                 rfkill_unregister(wifi_rfkill);
 692 register_wifi_error:
 693         rfkill_destroy(wifi_rfkill);
 694         wifi_rfkill = NULL;
 695         return err;
 696 }
 697
 698 static int __devinit hp_wmi_rfkill2_setup(struct platform_device *device)
 699 {
 700         int err, i;
 701         struct bios_rfkill2_state state;
 702         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 703                                    0, sizeof(state));
 704         if (err)
 705                 return err;
 706
 707         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 708                 printk(KERN_WARNING PREFIX "unable to parse 0x1b query output\n");
 709                 return -EINVAL;
 710         }
 711
 712         for (i = 0; i < state.count; i++) {
 713                 struct rfkill *rfkill;
 714                 enum rfkill_type type;
 715                 char *name;
 716                 switch (state.device[i].radio_type) {
 717                 case HPWMI_WIFI:
 718                         type = RFKILL_TYPE_WLAN;
 719                         name = "hp-wifi";
 720                         break;
 721                 case HPWMI_BLUETOOTH:
 722                         type = RFKILL_TYPE_BLUETOOTH;
 723                         name = "hp-bluetooth";
 724                         break;
 725                 case HPWMI_WWAN:
 726                         type = RFKILL_TYPE_WWAN;
 727                         name = "hp-wwan";
 728                         break;
 729                 default:
 730                         printk(KERN_WARNING PREFIX "unknown device type 0x%x\n",
 731                                  state.device[i].radio_type);
 732                         continue;
 733                 }
 734
 735                 if (!state.device[i].vendor_id) {
 736                         printk(KERN_WARNING PREFIX "zero device %d while %d "
 737                                "reported\n", i, state.count);
 738                         continue;
 739                 }
 740
 741                 rfkill = rfkill_alloc(name, &device->dev, type,
 742                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 743                 if (!rfkill) {
 744                         err = -ENOMEM;
 745                         goto fail;
 746                 }
 747
 748                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 749                 rfkill2[rfkill2_count].num = i;
 750                 rfkill2[rfkill2_count].rfkill = rfkill;
 751
 752                 rfkill_init_sw_state(rfkill,
 753                                      IS_SWBLOCKED(state.device[i].power));
 754                 rfkill_set_hw_state(rfkill,
 755                                     IS_HWBLOCKED(state.device[i].power));
 756
 757                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 758                         printk(KERN_INFO PREFIX "device %s blocked by BIOS\n",
 759                                name);
 760
 761                 err = rfkill_register(rfkill);
 762                 if (err) {
 763                         rfkill_destroy(rfkill);
 764                         goto fail;
 765                 }
 766
 767                 rfkill2_count++;
 768         }
 769
 770         return 0;
 771 fail:
 772         for (; rfkill2_count > 0; rfkill2_count--) {
 773                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 774                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 775         }
 776         return err;
 777 }
 778
 779 static int __devinit hp_wmi_bios_setup(struct platform_device *device)
 780 {
 781         int err;
 782
 783         /* clear detected rfkill devices */
 784         wifi_rfkill = NULL;
 785         bluetooth_rfkill = NULL;
 786         wwan_rfkill = NULL;
 787         rfkill2_count = 0;
 788
 789         if (hp_wmi_rfkill_setup(device))
 790                 hp_wmi_rfkill2_setup(device);
 791
 792         err = device_create_file(&device->dev, &dev_attr_display);
 793         if (err)
 794                 goto add_sysfs_error;
 795         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 796         if (err)
 797                 goto add_sysfs_error;
 798         err = device_create_file(&device->dev, &dev_attr_als);
 799         if (err)
 800                 goto add_sysfs_error;
 801         err = device_create_file(&device->dev, &dev_attr_dock);
 802         if (err)
 803                 goto add_sysfs_error;
 804         err = device_create_file(&device->dev, &dev_attr_tablet);
 805         if (err)
 806                 goto add_sysfs_error;
 807         return 0;
 808
 809 add_sysfs_error:
 810         cleanup_sysfs(device);
 811         return err;
 812 }
 813
 814 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 815 {
 816         int i;
 817         cleanup_sysfs(device);
 818
 819         for (i = 0; i < rfkill2_count; i++) {
 820                 rfkill_unregister(rfkill2[i].rfkill);
 821                 rfkill_destroy(rfkill2[i].rfkill);
 822         }
 823
 824         if (wifi_rfkill) {
 825                 rfkill_unregister(wifi_rfkill);
 826                 rfkill_destroy(wifi_rfkill);
 827         }
 828         if (bluetooth_rfkill) {
 829                 rfkill_unregister(bluetooth_rfkill);
 830                 rfkill_destroy(bluetooth_rfkill);
 831         }
 832         if (wwan_rfkill) {
 833                 rfkill_unregister(wwan_rfkill);
 834                 rfkill_destroy(wwan_rfkill);
 835         }
 836
 837         return 0;
 838 }
 839
 840 static int hp_wmi_resume_handler(struct device *device)
 841 {
 842         /*
 843          * Hardware state may have changed while suspended, so trigger
 844          * input events for the current state. As this is a switch,
 845          * the input layer will only actually pass it on if the state
 846          * changed.
 847          */
 848         if (hp_wmi_input_dev) {
 849                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 850                                     hp_wmi_dock_state());
 851                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 852                                     hp_wmi_tablet_state());
 853                 input_sync(hp_wmi_input_dev);
 854         }
 855
 856         if (rfkill2_count)
 857                 hp_wmi_rfkill2_refresh();
 858
 859         if (wifi_rfkill)
 860                 rfkill_set_states(wifi_rfkill,
 861                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 862                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 863         if (bluetooth_rfkill)
 864                 rfkill_set_states(bluetooth_rfkill,
 865                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 866                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 867         if (wwan_rfkill)
 868                 rfkill_set_states(wwan_rfkill,
 869                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 870                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 871
 872         return 0;
 873 }
 874
 875 static int __init hp_wmi_init(void)
 876 {
 877         int err;
 878         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
 879         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
 880
 881         if (event_capable) {
 882                 err = hp_wmi_input_setup();
 883                 if (err)
 884                         return err;
 885         }
 886
 887         if (bios_capable) {
 888                 err = platform_driver_register(&hp_wmi_driver);
 889                 if (err)
 890                         goto err_driver_reg;
 891                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
 892                 if (!hp_wmi_platform_dev) {
 893                         err = -ENOMEM;
 894                         goto err_device_alloc;
 895                 }
 896                 err = platform_device_add(hp_wmi_platform_dev);
 897                 if (err)
 898                         goto err_device_add;
 899         }
 900
 901         if (!bios_capable && !event_capable)
 902                 return -ENODEV;
 903
 904         return 0;
 905
 906 err_device_add:
 907         platform_device_put(hp_wmi_platform_dev);
 908 err_device_alloc:
 909         platform_driver_unregister(&hp_wmi_driver);
 910 err_driver_reg:
 911         if (event_capable)
 912                 hp_wmi_input_destroy();
 913
 914         return err;
 915 }
 916
 917 static void __exit hp_wmi_exit(void)
 918 {
 919         if (wmi_has_guid(HPWMI_EVENT_GUID))
 920                 hp_wmi_input_destroy();
 921
 922         if (hp_wmi_platform_dev) {
 923                 platform_device_unregister(hp_wmi_platform_dev);
 924                 platform_driver_unregister(&hp_wmi_driver);
 925         }
 926 }
 927
 928 module_init(hp_wmi_init);
 929 module_exit(hp_wmi_exit);