drivers/platform/x86/toshiba_acpi.c

   1 /*
   2  *  toshiba_acpi.c - Toshiba Laptop ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2002-2004 John Belmonte
   6  *  Copyright (C) 2008 Philip Langdale
   7  *  Copyright (C) 2010 Pierre Ducroquet
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  *
  24  *  The devolpment page for this driver is located at
  25  *  http://memebeam.org/toys/ToshibaAcpiDriver.
  26  *
  27  *  Credits:
  28  *      Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse
  29  *              engineering the Windows drivers
  30  *      Yasushi Nagato - changes for linux kernel 2.4 -> 2.5
  31  *      Rob Miller - TV out and hotkeys help
  32  *
  33  *
  34  *  TODO
  35  *
  36  */
  37
  38 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  39
  40 #define TOSHIBA_ACPI_VERSION    "0.19"
  41 #define PROC_INTERFACE_VERSION  1
  42
  43 #include <linux/kernel.h>
  44 #include <linux/module.h>
  45 #include <linux/init.h>
  46 #include <linux/types.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/seq_file.h>
  49 #include <linux/backlight.h>
  50 #include <linux/rfkill.h>
  51 #include <linux/input.h>
  52 #include <linux/input/sparse-keymap.h>
  53 #include <linux/leds.h>
  54 #include <linux/slab.h>
  55 #include <linux/workqueue.h>
  56 #include <linux/i8042.h>
  57 #include <linux/acpi.h>
  58 #include <asm/uaccess.h>
  59
  60 MODULE_AUTHOR("John Belmonte");
  61 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
  62 MODULE_LICENSE("GPL");
  63
  64 #define TOSHIBA_WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"
  65
  66 /* Scan code for Fn key on TOS1900 models */
  67 #define TOS1900_FN_SCAN         0x6e
  68
  69 /* Toshiba ACPI method paths */
  70 #define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
  71
  72 /* Toshiba HCI interface definitions
  73  *
  74  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
  75  * be uniform across all their models.  Ideally we would just call
  76  * dedicated ACPI methods instead of using this primitive interface.
  77  * However the ACPI methods seem to be incomplete in some areas (for
  78  * example they allow setting, but not reading, the LCD brightness value),
  79  * so this is still useful.
  80  *
  81  * SCI stands for "System Configuration Interface" which aim is to
  82  * conceal differences in hardware between different models.
  83  */
  84
  85 #define HCI_WORDS                       6
  86
  87 /* operations */
  88 #define HCI_SET                         0xff00
  89 #define HCI_GET                         0xfe00
  90 #define SCI_OPEN                        0xf100
  91 #define SCI_CLOSE                       0xf200
  92 #define SCI_GET                         0xf300
  93 #define SCI_SET                         0xf400
  94
  95 /* return codes */
  96 #define HCI_SUCCESS                     0x0000
  97 #define HCI_FAILURE                     0x1000
  98 #define HCI_NOT_SUPPORTED               0x8000
  99 #define HCI_EMPTY                       0x8c00
 100 #define SCI_OPEN_CLOSE_OK               0x0044
 101 #define SCI_ALREADY_OPEN                0x8100
 102 #define SCI_NOT_OPENED                  0x8200
 103 #define SCI_NOT_PRESENT                 0x8600
 104
 105 /* registers */
 106 #define HCI_FAN                         0x0004
 107 #define HCI_TR_BACKLIGHT                0x0005
 108 #define HCI_SYSTEM_EVENT                0x0016
 109 #define HCI_VIDEO_OUT                   0x001c
 110 #define HCI_HOTKEY_EVENT                0x001e
 111 #define HCI_LCD_BRIGHTNESS              0x002a
 112 #define HCI_WIRELESS                    0x0056
 113
 114 /* field definitions */
 115 #define HCI_HOTKEY_DISABLE              0x0b
 116 #define HCI_HOTKEY_ENABLE               0x09
 117 #define HCI_LCD_BRIGHTNESS_BITS         3
 118 #define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
 119 #define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
 120 #define HCI_VIDEO_OUT_LCD               0x1
 121 #define HCI_VIDEO_OUT_CRT               0x2
 122 #define HCI_VIDEO_OUT_TV                0x4
 123 #define HCI_WIRELESS_KILL_SWITCH        0x01
 124 #define HCI_WIRELESS_BT_PRESENT         0x0f
 125 #define HCI_WIRELESS_BT_ATTACH          0x40
 126 #define HCI_WIRELESS_BT_POWER           0x80
 127
 128 struct toshiba_acpi_dev {
 129         struct acpi_device *acpi_dev;
 130         const char *method_hci;
 131         struct rfkill *bt_rfk;
 132         struct input_dev *hotkey_dev;
 133         struct work_struct hotkey_work;
 134         struct backlight_device *backlight_dev;
 135         struct led_classdev led_dev;
 136
 137         int force_fan;
 138         int last_key_event;
 139         int key_event_valid;
 140
 141         unsigned int illumination_supported:1;
 142         unsigned int video_supported:1;
 143         unsigned int fan_supported:1;
 144         unsigned int system_event_supported:1;
 145         unsigned int ntfy_supported:1;
 146         unsigned int info_supported:1;
 147         unsigned int tr_backlight_supported:1;
 148
 149         struct mutex mutex;
 150 };
 151
 152 static struct toshiba_acpi_dev *toshiba_acpi;
 153
 154 static const struct acpi_device_id toshiba_device_ids[] = {
 155         {"TOS6200", 0},
 156         {"TOS6208", 0},
 157         {"TOS1900", 0},
 158         {"", 0},
 159 };
 160 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
 161
 162 static const struct key_entry toshiba_acpi_keymap[] = {
 163         { KE_KEY, 0x9e, { KEY_RFKILL } },
 164         { KE_KEY, 0x101, { KEY_MUTE } },
 165         { KE_KEY, 0x102, { KEY_ZOOMOUT } },
 166         { KE_KEY, 0x103, { KEY_ZOOMIN } },
 167         { KE_KEY, 0x12c, { KEY_KBDILLUMTOGGLE } },
 168         { KE_KEY, 0x139, { KEY_ZOOMRESET } },
 169         { KE_KEY, 0x13b, { KEY_COFFEE } },
 170         { KE_KEY, 0x13c, { KEY_BATTERY } },
 171         { KE_KEY, 0x13d, { KEY_SLEEP } },
 172         { KE_KEY, 0x13e, { KEY_SUSPEND } },
 173         { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } },
 174         { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } },
 175         { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } },
 176         { KE_KEY, 0x142, { KEY_WLAN } },
 177         { KE_KEY, 0x143, { KEY_TOUCHPAD_TOGGLE } },
 178         { KE_KEY, 0x17f, { KEY_FN } },
 179         { KE_KEY, 0xb05, { KEY_PROG2 } },
 180         { KE_KEY, 0xb06, { KEY_WWW } },
 181         { KE_KEY, 0xb07, { KEY_MAIL } },
 182         { KE_KEY, 0xb30, { KEY_STOP } },
 183         { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } },
 184         { KE_KEY, 0xb32, { KEY_NEXTSONG } },
 185         { KE_KEY, 0xb33, { KEY_PLAYPAUSE } },
 186         { KE_KEY, 0xb5a, { KEY_MEDIA } },
 187         { KE_IGNORE, 0x1430, { KEY_RESERVED } },
 188         { KE_END, 0 },
 189 };
 190
 191 /* utility
 192  */
 193
 194 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
 195 {
 196         *word = (*word & ~mask) | (mask * value);
 197 }
 198
 199 /* acpi interface wrappers
 200  */
 201
 202 static int write_acpi_int(const char *methodName, int val)
 203 {
 204         acpi_status status;
 205
 206         status = acpi_execute_simple_method(NULL, (char *)methodName, val);
 207         return (status == AE_OK) ? 0 : -EIO;
 208 }
 209
 210 /* Perform a raw HCI call.  Here we don't care about input or output buffer
 211  * format.
 212  */
 213 static acpi_status hci_raw(struct toshiba_acpi_dev *dev,
 214                            const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
 215 {
 216         struct acpi_object_list params;
 217         union acpi_object in_objs[HCI_WORDS];
 218         struct acpi_buffer results;
 219         union acpi_object out_objs[HCI_WORDS + 1];
 220         acpi_status status;
 221         int i;
 222
 223         params.count = HCI_WORDS;
 224         params.pointer = in_objs;
 225         for (i = 0; i < HCI_WORDS; ++i) {
 226                 in_objs[i].type = ACPI_TYPE_INTEGER;
 227                 in_objs[i].integer.value = in[i];
 228         }
 229
 230         results.length = sizeof(out_objs);
 231         results.pointer = out_objs;
 232
 233         status = acpi_evaluate_object(dev->acpi_dev->handle,
 234                                       (char *)dev->method_hci, &params,
 235                                       &results);
 236         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
 237                 for (i = 0; i < out_objs->package.count; ++i) {
 238                         out[i] = out_objs->package.elements[i].integer.value;
 239                 }
 240         }
 241
 242         return status;
 243 }
 244
 245 /* common hci tasks (get or set one or two value)
 246  *
 247  * In addition to the ACPI status, the HCI system returns a result which
 248  * may be useful (such as "not supported").
 249  */
 250
 251 static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg,
 252                               u32 in1, u32 *result)
 253 {
 254         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
 255         u32 out[HCI_WORDS];
 256         acpi_status status = hci_raw(dev, in, out);
 257         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 258         return status;
 259 }
 260
 261 static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg,
 262                              u32 *out1, u32 *result)
 263 {
 264         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
 265         u32 out[HCI_WORDS];
 266         acpi_status status = hci_raw(dev, in, out);
 267         *out1 = out[2];
 268         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 269         return status;
 270 }
 271
 272 static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg,
 273                               u32 in1, u32 in2, u32 *result)
 274 {
 275         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
 276         u32 out[HCI_WORDS];
 277         acpi_status status = hci_raw(dev, in, out);
 278         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 279         return status;
 280 }
 281
 282 static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg,
 283                              u32 *out1, u32 *out2, u32 *result)
 284 {
 285         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
 286         u32 out[HCI_WORDS];
 287         acpi_status status = hci_raw(dev, in, out);
 288         *out1 = out[2];
 289         *out2 = out[3];
 290         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 291         return status;
 292 }
 293
 294 /* common sci tasks
 295  */
 296
 297 static int sci_open(struct toshiba_acpi_dev *dev)
 298 {
 299         u32 in[HCI_WORDS] = { SCI_OPEN, 0, 0, 0, 0, 0 };
 300         u32 out[HCI_WORDS];
 301         acpi_status status;
 302
 303         status = hci_raw(dev, in, out);
 304         if  (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
 305                 pr_err("ACPI call to open SCI failed\n");
 306                 return 0;
 307         }
 308
 309         if (out[0] == SCI_OPEN_CLOSE_OK) {
 310                 return 1;
 311         } else if (out[0] == SCI_ALREADY_OPEN) {
 312                 pr_info("Toshiba SCI already opened\n");
 313                 return 1;
 314         } else if (out[0] == SCI_NOT_PRESENT) {
 315                 pr_info("Toshiba SCI is not present\n");
 316         }
 317
 318         return 0;
 319 }
 320
 321 static void sci_close(struct toshiba_acpi_dev *dev)
 322 {
 323         u32 in[HCI_WORDS] = { SCI_CLOSE, 0, 0, 0, 0, 0 };
 324         u32 out[HCI_WORDS];
 325         acpi_status status;
 326
 327         status = hci_raw(dev, in, out);
 328         if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
 329                 pr_err("ACPI call to close SCI failed\n");
 330                 return;
 331         }
 332
 333         if (out[0] == SCI_OPEN_CLOSE_OK)
 334                 return;
 335         else if (out[0] == SCI_NOT_OPENED)
 336                 pr_info("Toshiba SCI not opened\n");
 337         else if (out[0] == SCI_NOT_PRESENT)
 338                 pr_info("Toshiba SCI is not present\n");
 339 }
 340
 341 static acpi_status sci_read(struct toshiba_acpi_dev *dev, u32 reg,
 342                             u32 *out1, u32 *result)
 343 {
 344         u32 in[HCI_WORDS] = { SCI_GET, reg, 0, 0, 0, 0 };
 345         u32 out[HCI_WORDS];
 346         acpi_status status = hci_raw(dev, in, out);
 347         *out1 = out[2];
 348         *result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE;
 349         return status;
 350 }
 351
 352 static acpi_status sci_write(struct toshiba_acpi_dev *dev, u32 reg,
 353                              u32 in1, u32 *result)
 354 {
 355         u32 in[HCI_WORDS] = { SCI_SET, reg, in1, 0, 0, 0 };
 356         u32 out[HCI_WORDS];
 357         acpi_status status = hci_raw(dev, in, out);
 358         *result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE;
 359         return status;
 360 }
 361
 362 /* Illumination support */
 363 static int toshiba_illumination_available(struct toshiba_acpi_dev *dev)
 364 {
 365         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 366         u32 out[HCI_WORDS];
 367         acpi_status status;
 368
 369         in[0] = 0xf100;
 370         status = hci_raw(dev, in, out);
 371         if (ACPI_FAILURE(status)) {
 372                 pr_info("Illumination device not available\n");
 373                 return 0;
 374         }
 375         in[0] = 0xf400;
 376         status = hci_raw(dev, in, out);
 377         return 1;
 378 }
 379
 380 static void toshiba_illumination_set(struct led_classdev *cdev,
 381                                      enum led_brightness brightness)
 382 {
 383         struct toshiba_acpi_dev *dev = container_of(cdev,
 384                         struct toshiba_acpi_dev, led_dev);
 385         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 386         u32 out[HCI_WORDS];
 387         acpi_status status;
 388
 389         /* First request : initialize communication. */
 390         in[0] = 0xf100;
 391         status = hci_raw(dev, in, out);
 392         if (ACPI_FAILURE(status)) {
 393                 pr_info("Illumination device not available\n");
 394                 return;
 395         }
 396
 397         if (brightness) {
 398                 /* Switch the illumination on */
 399                 in[0] = 0xf400;
 400                 in[1] = 0x14e;
 401                 in[2] = 1;
 402                 status = hci_raw(dev, in, out);
 403                 if (ACPI_FAILURE(status)) {
 404                         pr_info("ACPI call for illumination failed\n");
 405                         return;
 406                 }
 407         } else {
 408                 /* Switch the illumination off */
 409                 in[0] = 0xf400;
 410                 in[1] = 0x14e;
 411                 in[2] = 0;
 412                 status = hci_raw(dev, in, out);
 413                 if (ACPI_FAILURE(status)) {
 414                         pr_info("ACPI call for illumination failed.\n");
 415                         return;
 416                 }
 417         }
 418
 419         /* Last request : close communication. */
 420         in[0] = 0xf200;
 421         in[1] = 0;
 422         in[2] = 0;
 423         hci_raw(dev, in, out);
 424 }
 425
 426 static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
 427 {
 428         struct toshiba_acpi_dev *dev = container_of(cdev,
 429                         struct toshiba_acpi_dev, led_dev);
 430         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 431         u32 out[HCI_WORDS];
 432         acpi_status status;
 433         enum led_brightness result;
 434
 435         /* First request : initialize communication. */
 436         in[0] = 0xf100;
 437         status = hci_raw(dev, in, out);
 438         if (ACPI_FAILURE(status)) {
 439                 pr_info("Illumination device not available\n");
 440                 return LED_OFF;
 441         }
 442
 443         /* Check the illumination */
 444         in[0] = 0xf300;
 445         in[1] = 0x14e;
 446         status = hci_raw(dev, in, out);
 447         if (ACPI_FAILURE(status)) {
 448                 pr_info("ACPI call for illumination failed.\n");
 449                 return LED_OFF;
 450         }
 451
 452         result = out[2] ? LED_FULL : LED_OFF;
 453
 454         /* Last request : close communication. */
 455         in[0] = 0xf200;
 456         in[1] = 0;
 457         in[2] = 0;
 458         hci_raw(dev, in, out);
 459
 460         return result;
 461 }
 462
 463 /* Bluetooth rfkill handlers */
 464
 465 static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)
 466 {
 467         u32 hci_result;
 468         u32 value, value2;
 469
 470         value = 0;
 471         value2 = 0;
 472         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
 473         if (hci_result == HCI_SUCCESS)
 474                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
 475
 476         return hci_result;
 477 }
 478
 479 static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state)
 480 {
 481         u32 hci_result;
 482         u32 value, value2;
 483
 484         value = 0;
 485         value2 = 0x0001;
 486         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
 487
 488         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
 489         return hci_result;
 490 }
 491
 492 static int bt_rfkill_set_block(void *data, bool blocked)
 493 {
 494         struct toshiba_acpi_dev *dev = data;
 495         u32 result1, result2;
 496         u32 value;
 497         int err;
 498         bool radio_state;
 499
 500         value = (blocked == false);
 501
 502         mutex_lock(&dev->mutex);
 503         if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) {
 504                 err = -EIO;
 505                 goto out;
 506         }
 507
 508         if (!radio_state) {
 509                 err = 0;
 510                 goto out;
 511         }
 512
 513         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
 514         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
 515
 516         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
 517                 err = -EIO;
 518         else
 519                 err = 0;
 520  out:
 521         mutex_unlock(&dev->mutex);
 522         return err;
 523 }
 524
 525 static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
 526 {
 527         bool new_rfk_state;
 528         bool value;
 529         u32 hci_result;
 530         struct toshiba_acpi_dev *dev = data;
 531
 532         mutex_lock(&dev->mutex);
 533
 534         hci_result = hci_get_radio_state(dev, &value);
 535         if (hci_result != HCI_SUCCESS) {
 536                 /* Can't do anything useful */
 537                 mutex_unlock(&dev->mutex);
 538                 return;
 539         }
 540
 541         new_rfk_state = value;
 542
 543         mutex_unlock(&dev->mutex);
 544
 545         if (rfkill_set_hw_state(rfkill, !new_rfk_state))
 546                 bt_rfkill_set_block(data, true);
 547 }
 548
 549 static const struct rfkill_ops toshiba_rfk_ops = {
 550         .set_block = bt_rfkill_set_block,
 551         .poll = bt_rfkill_poll,
 552 };
 553
 554 static int get_tr_backlight_status(struct toshiba_acpi_dev *dev, bool *enabled)
 555 {
 556         u32 hci_result;
 557         u32 status;
 558
 559         hci_read1(dev, HCI_TR_BACKLIGHT, &status, &hci_result);
 560         *enabled = !status;
 561         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 562 }
 563
 564 static int set_tr_backlight_status(struct toshiba_acpi_dev *dev, bool enable)
 565 {
 566         u32 hci_result;
 567         u32 value = !enable;
 568
 569         hci_write1(dev, HCI_TR_BACKLIGHT, value, &hci_result);
 570         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 571 }
 572
 573 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
 574
 575 static int __get_lcd_brightness(struct toshiba_acpi_dev *dev)
 576 {
 577         u32 hci_result;
 578         u32 value;
 579         int brightness = 0;
 580
 581         if (dev->tr_backlight_supported) {
 582                 bool enabled;
 583                 int ret = get_tr_backlight_status(dev, &enabled);
 584                 if (ret)
 585                         return ret;
 586                 if (enabled)
 587                         return 0;
 588                 brightness++;
 589         }
 590
 591         hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result);
 592         if (hci_result == HCI_SUCCESS)
 593                 return brightness + (value >> HCI_LCD_BRIGHTNESS_SHIFT);
 594
 595         return -EIO;
 596 }
 597
 598 static int get_lcd_brightness(struct backlight_device *bd)
 599 {
 600         struct toshiba_acpi_dev *dev = bl_get_data(bd);
 601         return __get_lcd_brightness(dev);
 602 }
 603
 604 static int lcd_proc_show(struct seq_file *m, void *v)
 605 {
 606         struct toshiba_acpi_dev *dev = m->private;
 607         int value;
 608         int levels;
 609
 610         if (!dev->backlight_dev)
 611                 return -ENODEV;
 612
 613         levels = dev->backlight_dev->props.max_brightness + 1;
 614         value = get_lcd_brightness(dev->backlight_dev);
 615         if (value >= 0) {
 616                 seq_printf(m, "brightness:              %d\n", value);
 617                 seq_printf(m, "brightness_levels:       %d\n", levels);
 618                 return 0;
 619         }
 620
 621         pr_err("Error reading LCD brightness\n");
 622         return -EIO;
 623 }
 624
 625 static int lcd_proc_open(struct inode *inode, struct file *file)
 626 {
 627         return single_open(file, lcd_proc_show, PDE_DATA(inode));
 628 }
 629
 630 static int set_lcd_brightness(struct toshiba_acpi_dev *dev, int value)
 631 {
 632         u32 hci_result;
 633
 634         if (dev->tr_backlight_supported) {
 635                 bool enable = !value;
 636                 int ret = set_tr_backlight_status(dev, enable);
 637                 if (ret)
 638                         return ret;
 639                 if (value)
 640                         value--;
 641         }
 642
 643         value = value << HCI_LCD_BRIGHTNESS_SHIFT;
 644         hci_write1(dev, HCI_LCD_BRIGHTNESS, value, &hci_result);
 645         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 646 }
 647
 648 static int set_lcd_status(struct backlight_device *bd)
 649 {
 650         struct toshiba_acpi_dev *dev = bl_get_data(bd);
 651         return set_lcd_brightness(dev, bd->props.brightness);
 652 }
 653
 654 static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
 655                               size_t count, loff_t *pos)
 656 {
 657         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
 658         char cmd[42];
 659         size_t len;
 660         int value;
 661         int ret;
 662         int levels = dev->backlight_dev->props.max_brightness + 1;
 663
 664         len = min(count, sizeof(cmd) - 1);
 665         if (copy_from_user(cmd, buf, len))
 666                 return -EFAULT;
 667         cmd[len] = '\0';
 668
 669         if (sscanf(cmd, " brightness : %i", &value) == 1 &&
 670             value >= 0 && value < levels) {
 671                 ret = set_lcd_brightness(dev, value);
 672                 if (ret == 0)
 673                         ret = count;
 674         } else {
 675                 ret = -EINVAL;
 676         }
 677         return ret;
 678 }
 679
 680 static const struct file_operations lcd_proc_fops = {
 681         .owner          = THIS_MODULE,
 682         .open           = lcd_proc_open,
 683         .read           = seq_read,
 684         .llseek         = seq_lseek,
 685         .release        = single_release,
 686         .write          = lcd_proc_write,
 687 };
 688
 689 static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status)
 690 {
 691         u32 hci_result;
 692
 693         hci_read1(dev, HCI_VIDEO_OUT, status, &hci_result);
 694         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 695 }
 696
 697 static int video_proc_show(struct seq_file *m, void *v)
 698 {
 699         struct toshiba_acpi_dev *dev = m->private;
 700         u32 value;
 701         int ret;
 702
 703         ret = get_video_status(dev, &value);
 704         if (!ret) {
 705                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
 706                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
 707                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
 708                 seq_printf(m, "lcd_out:                 %d\n", is_lcd);
 709                 seq_printf(m, "crt_out:                 %d\n", is_crt);
 710                 seq_printf(m, "tv_out:                  %d\n", is_tv);
 711         }
 712
 713         return ret;
 714 }
 715
 716 static int video_proc_open(struct inode *inode, struct file *file)
 717 {
 718         return single_open(file, video_proc_show, PDE_DATA(inode));
 719 }
 720
 721 static ssize_t video_proc_write(struct file *file, const char __user *buf,
 722                                 size_t count, loff_t *pos)
 723 {
 724         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
 725         char *cmd, *buffer;
 726         int ret;
 727         int value;
 728         int remain = count;
 729         int lcd_out = -1;
 730         int crt_out = -1;
 731         int tv_out = -1;
 732         u32 video_out;
 733
 734         cmd = kmalloc(count + 1, GFP_KERNEL);
 735         if (!cmd)
 736                 return -ENOMEM;
 737         if (copy_from_user(cmd, buf, count)) {
 738                 kfree(cmd);
 739                 return -EFAULT;
 740         }
 741         cmd[count] = '\0';
 742
 743         buffer = cmd;
 744
 745         /* scan expression.  Multiple expressions may be delimited with ;
 746          *
 747          *  NOTE: to keep scanning simple, invalid fields are ignored
 748          */
 749         while (remain) {
 750                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
 751                         lcd_out = value & 1;
 752                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
 753                         crt_out = value & 1;
 754                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
 755                         tv_out = value & 1;
 756                 /* advance to one character past the next ; */
 757                 do {
 758                         ++buffer;
 759                         --remain;
 760                 }
 761                 while (remain && *(buffer - 1) != ';');
 762         }
 763
 764         kfree(cmd);
 765
 766         ret = get_video_status(dev, &video_out);
 767         if (!ret) {
 768                 unsigned int new_video_out = video_out;
 769                 if (lcd_out != -1)
 770                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
 771                 if (crt_out != -1)
 772                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
 773                 if (tv_out != -1)
 774                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
 775                 /* To avoid unnecessary video disruption, only write the new
 776                  * video setting if something changed. */
 777                 if (new_video_out != video_out)
 778                         ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
 779         }
 780
 781         return ret ? ret : count;
 782 }
 783
 784 static const struct file_operations video_proc_fops = {
 785         .owner          = THIS_MODULE,
 786         .open           = video_proc_open,
 787         .read           = seq_read,
 788         .llseek         = seq_lseek,
 789         .release        = single_release,
 790         .write          = video_proc_write,
 791 };
 792
 793 static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status)
 794 {
 795         u32 hci_result;
 796
 797         hci_read1(dev, HCI_FAN, status, &hci_result);
 798         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 799 }
 800
 801 static int fan_proc_show(struct seq_file *m, void *v)
 802 {
 803         struct toshiba_acpi_dev *dev = m->private;
 804         int ret;
 805         u32 value;
 806
 807         ret = get_fan_status(dev, &value);
 808         if (!ret) {
 809                 seq_printf(m, "running:                 %d\n", (value > 0));
 810                 seq_printf(m, "force_on:                %d\n", dev->force_fan);
 811         }
 812
 813         return ret;
 814 }
 815
 816 static int fan_proc_open(struct inode *inode, struct file *file)
 817 {
 818         return single_open(file, fan_proc_show, PDE_DATA(inode));
 819 }
 820
 821 static ssize_t fan_proc_write(struct file *file, const char __user *buf,
 822                               size_t count, loff_t *pos)
 823 {
 824         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
 825         char cmd[42];
 826         size_t len;
 827         int value;
 828         u32 hci_result;
 829
 830         len = min(count, sizeof(cmd) - 1);
 831         if (copy_from_user(cmd, buf, len))
 832                 return -EFAULT;
 833         cmd[len] = '\0';
 834
 835         if (sscanf(cmd, " force_on : %i", &value) == 1 &&
 836             value >= 0 && value <= 1) {
 837                 hci_write1(dev, HCI_FAN, value, &hci_result);
 838                 if (hci_result != HCI_SUCCESS)
 839                         return -EIO;
 840                 else
 841                         dev->force_fan = value;
 842         } else {
 843                 return -EINVAL;
 844         }
 845
 846         return count;
 847 }
 848
 849 static const struct file_operations fan_proc_fops = {
 850         .owner          = THIS_MODULE,
 851         .open           = fan_proc_open,
 852         .read           = seq_read,
 853         .llseek         = seq_lseek,
 854         .release        = single_release,
 855         .write          = fan_proc_write,
 856 };
 857
 858 static int keys_proc_show(struct seq_file *m, void *v)
 859 {
 860         struct toshiba_acpi_dev *dev = m->private;
 861         u32 hci_result;
 862         u32 value;
 863
 864         if (!dev->key_event_valid && dev->system_event_supported) {
 865                 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
 866                 if (hci_result == HCI_SUCCESS) {
 867                         dev->key_event_valid = 1;
 868                         dev->last_key_event = value;
 869                 } else if (hci_result == HCI_EMPTY) {
 870                         /* better luck next time */
 871                 } else if (hci_result == HCI_NOT_SUPPORTED) {
 872                         /* This is a workaround for an unresolved issue on
 873                          * some machines where system events sporadically
 874                          * become disabled. */
 875                         hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
 876                         pr_notice("Re-enabled hotkeys\n");
 877                 } else {
 878                         pr_err("Error reading hotkey status\n");
 879                         return -EIO;
 880                 }
 881         }
 882
 883         seq_printf(m, "hotkey_ready:            %d\n", dev->key_event_valid);
 884         seq_printf(m, "hotkey:                  0x%04x\n", dev->last_key_event);
 885         return 0;
 886 }
 887
 888 static int keys_proc_open(struct inode *inode, struct file *file)
 889 {
 890         return single_open(file, keys_proc_show, PDE_DATA(inode));
 891 }
 892
 893 static ssize_t keys_proc_write(struct file *file, const char __user *buf,
 894                                size_t count, loff_t *pos)
 895 {
 896         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
 897         char cmd[42];
 898         size_t len;
 899         int value;
 900
 901         len = min(count, sizeof(cmd) - 1);
 902         if (copy_from_user(cmd, buf, len))
 903                 return -EFAULT;
 904         cmd[len] = '\0';
 905
 906         if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
 907                 dev->key_event_valid = 0;
 908         } else {
 909                 return -EINVAL;
 910         }
 911
 912         return count;
 913 }
 914
 915 static const struct file_operations keys_proc_fops = {
 916         .owner          = THIS_MODULE,
 917         .open           = keys_proc_open,
 918         .read           = seq_read,
 919         .llseek         = seq_lseek,
 920         .release        = single_release,
 921         .write          = keys_proc_write,
 922 };
 923
 924 static int version_proc_show(struct seq_file *m, void *v)
 925 {
 926         seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
 927         seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
 928         return 0;
 929 }
 930
 931 static int version_proc_open(struct inode *inode, struct file *file)
 932 {
 933         return single_open(file, version_proc_show, PDE_DATA(inode));
 934 }
 935
 936 static const struct file_operations version_proc_fops = {
 937         .owner          = THIS_MODULE,
 938         .open           = version_proc_open,
 939         .read           = seq_read,
 940         .llseek         = seq_lseek,
 941         .release        = single_release,
 942 };
 943
 944 /* proc and module init
 945  */
 946
 947 #define PROC_TOSHIBA            "toshiba"
 948
 949 static void create_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
 950 {
 951         if (dev->backlight_dev)
 952                 proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 953                                  &lcd_proc_fops, dev);
 954         if (dev->video_supported)
 955                 proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 956                                  &video_proc_fops, dev);
 957         if (dev->fan_supported)
 958                 proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 959                                  &fan_proc_fops, dev);
 960         if (dev->hotkey_dev)
 961                 proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 962                                  &keys_proc_fops, dev);
 963         proc_create_data("version", S_IRUGO, toshiba_proc_dir,
 964                          &version_proc_fops, dev);
 965 }
 966
 967 static void remove_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
 968 {
 969         if (dev->backlight_dev)
 970                 remove_proc_entry("lcd", toshiba_proc_dir);
 971         if (dev->video_supported)
 972                 remove_proc_entry("video", toshiba_proc_dir);
 973         if (dev->fan_supported)
 974                 remove_proc_entry("fan", toshiba_proc_dir);
 975         if (dev->hotkey_dev)
 976                 remove_proc_entry("keys", toshiba_proc_dir);
 977         remove_proc_entry("version", toshiba_proc_dir);
 978 }
 979
 980 static const struct backlight_ops toshiba_backlight_data = {
 981         .options = BL_CORE_SUSPENDRESUME,
 982         .get_brightness = get_lcd_brightness,
 983         .update_status  = set_lcd_status,
 984 };
 985
 986 static bool toshiba_acpi_i8042_filter(unsigned char data, unsigned char str,
 987                                       struct serio *port)
 988 {
 989         if (str & 0x20)
 990                 return false;
 991
 992         if (unlikely(data == 0xe0))
 993                 return false;
 994
 995         if ((data & 0x7f) == TOS1900_FN_SCAN) {
 996                 schedule_work(&toshiba_acpi->hotkey_work);
 997                 return true;
 998         }
 999
1000         return false;
1001 }
1002
1003 static void toshiba_acpi_hotkey_work(struct work_struct *work)
1004 {
1005         acpi_handle ec_handle = ec_get_handle();
1006         acpi_status status;
1007
1008         if (!ec_handle)
1009                 return;
1010
1011         status = acpi_evaluate_object(ec_handle, "NTFY", NULL, NULL);
1012         if (ACPI_FAILURE(status))
1013                 pr_err("ACPI NTFY method execution failed\n");
1014 }
1015
1016 /*
1017  * Returns hotkey scancode, or < 0 on failure.
1018  */
1019 static int toshiba_acpi_query_hotkey(struct toshiba_acpi_dev *dev)
1020 {
1021         unsigned long long value;
1022         acpi_status status;
1023
1024         status = acpi_evaluate_integer(dev->acpi_dev->handle, "INFO",
1025                                       NULL, &value);
1026         if (ACPI_FAILURE(status)) {
1027                 pr_err("ACPI INFO method execution failed\n");
1028                 return -EIO;
1029         }
1030
1031         return value;
1032 }
1033
1034 static void toshiba_acpi_report_hotkey(struct toshiba_acpi_dev *dev,
1035                                        int scancode)
1036 {
1037         if (scancode == 0x100)
1038                 return;
1039
1040         /* act on key press; ignore key release */
1041         if (scancode & 0x80)
1042                 return;
1043
1044         if (!sparse_keymap_report_event(dev->hotkey_dev, scancode, 1, true))
1045                 pr_info("Unknown key %x\n", scancode);
1046 }
1047
1048 static int toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
1049 {
1050         acpi_status status;
1051         acpi_handle ec_handle;
1052         int error;
1053         u32 hci_result;
1054
1055         dev->hotkey_dev = input_allocate_device();
1056         if (!dev->hotkey_dev)
1057                 return -ENOMEM;
1058
1059         dev->hotkey_dev->name = "Toshiba input device";
1060         dev->hotkey_dev->phys = "toshiba_acpi/input0";
1061         dev->hotkey_dev->id.bustype = BUS_HOST;
1062
1063         error = sparse_keymap_setup(dev->hotkey_dev, toshiba_acpi_keymap, NULL);
1064         if (error)
1065                 goto err_free_dev;
1066
1067         /*
1068          * For some machines the SCI responsible for providing hotkey
1069          * notification doesn't fire. We can trigger the notification
1070          * whenever the Fn key is pressed using the NTFY method, if
1071          * supported, so if it's present set up an i8042 key filter
1072          * for this purpose.
1073          */
1074         status = AE_ERROR;
1075         ec_handle = ec_get_handle();
1076         if (ec_handle && acpi_has_method(ec_handle, "NTFY")) {
1077                 INIT_WORK(&dev->hotkey_work, toshiba_acpi_hotkey_work);
1078
1079                 error = i8042_install_filter(toshiba_acpi_i8042_filter);
1080                 if (error) {
1081                         pr_err("Error installing key filter\n");
1082                         goto err_free_keymap;
1083                 }
1084
1085                 dev->ntfy_supported = 1;
1086         }
1087
1088         /*
1089          * Determine hotkey query interface. Prefer using the INFO
1090          * method when it is available.
1091          */
1092         if (acpi_has_method(dev->acpi_dev->handle, "INFO"))
1093                 dev->info_supported = 1;
1094         else {
1095                 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
1096                 if (hci_result == HCI_SUCCESS)
1097                         dev->system_event_supported = 1;
1098         }
1099
1100         if (!dev->info_supported && !dev->system_event_supported) {
1101                 pr_warn("No hotkey query interface found\n");
1102                 goto err_remove_filter;
1103         }
1104
1105         status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL);
1106         if (ACPI_FAILURE(status)) {
1107                 pr_info("Unable to enable hotkeys\n");
1108                 error = -ENODEV;
1109                 goto err_remove_filter;
1110         }
1111
1112         error = input_register_device(dev->hotkey_dev);
1113         if (error) {
1114                 pr_info("Unable to register input device\n");
1115                 goto err_remove_filter;
1116         }
1117
1118         hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &hci_result);
1119         return 0;
1120
1121  err_remove_filter:
1122         if (dev->ntfy_supported)
1123                 i8042_remove_filter(toshiba_acpi_i8042_filter);
1124  err_free_keymap:
1125         sparse_keymap_free(dev->hotkey_dev);
1126  err_free_dev:
1127         input_free_device(dev->hotkey_dev);
1128         dev->hotkey_dev = NULL;
1129         return error;
1130 }
1131
1132 static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev)
1133 {
1134         struct backlight_properties props;
1135         int brightness;
1136         int ret;
1137         bool enabled;
1138
1139         /*
1140          * Some machines don't support the backlight methods at all, and
1141          * others support it read-only. Either of these is pretty useless,
1142          * so only register the backlight device if the backlight method
1143          * supports both reads and writes.
1144          */
1145         brightness = __get_lcd_brightness(dev);
1146         if (brightness < 0)
1147                 return 0;
1148         ret = set_lcd_brightness(dev, brightness);
1149         if (ret) {
1150                 pr_debug("Backlight method is read-only, disabling backlight support\n");
1151                 return 0;
1152         }
1153
1154         /* Determine whether or not BIOS supports transflective backlight */
1155         ret = get_tr_backlight_status(dev, &enabled);
1156         dev->tr_backlight_supported = !ret;
1157
1158         memset(&props, 0, sizeof(props));
1159         props.type = BACKLIGHT_PLATFORM;
1160         props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
1161
1162         /* adding an extra level and having 0 change to transflective mode */
1163         if (dev->tr_backlight_supported)
1164                 props.max_brightness++;
1165
1166         dev->backlight_dev = backlight_device_register("toshiba",
1167                                                        &dev->acpi_dev->dev,
1168                                                        dev,
1169                                                        &toshiba_backlight_data,
1170                                                        &props);
1171         if (IS_ERR(dev->backlight_dev)) {
1172                 ret = PTR_ERR(dev->backlight_dev);
1173                 pr_err("Could not register toshiba backlight device\n");
1174                 dev->backlight_dev = NULL;
1175                 return ret;
1176         }
1177
1178         dev->backlight_dev->props.brightness = brightness;
1179         return 0;
1180 }
1181
1182 static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
1183 {
1184         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1185
1186         remove_toshiba_proc_entries(dev);
1187
1188         if (dev->ntfy_supported) {
1189                 i8042_remove_filter(toshiba_acpi_i8042_filter);
1190                 cancel_work_sync(&dev->hotkey_work);
1191         }
1192
1193         if (dev->hotkey_dev) {
1194                 input_unregister_device(dev->hotkey_dev);
1195                 sparse_keymap_free(dev->hotkey_dev);
1196         }
1197
1198         if (dev->bt_rfk) {
1199                 rfkill_unregister(dev->bt_rfk);
1200                 rfkill_destroy(dev->bt_rfk);
1201         }
1202
1203         if (dev->backlight_dev)
1204                 backlight_device_unregister(dev->backlight_dev);
1205
1206         if (dev->illumination_supported)
1207                 led_classdev_unregister(&dev->led_dev);
1208
1209         if (toshiba_acpi)
1210                 toshiba_acpi = NULL;
1211
1212         kfree(dev);
1213
1214         return 0;
1215 }
1216
1217 static const char *find_hci_method(acpi_handle handle)
1218 {
1219         if (acpi_has_method(handle, "GHCI"))
1220                 return "GHCI";
1221
1222         if (acpi_has_method(handle, "SPFC"))
1223                 return "SPFC";
1224
1225         return NULL;
1226 }
1227
1228 static int toshiba_acpi_add(struct acpi_device *acpi_dev)
1229 {
1230         struct toshiba_acpi_dev *dev;
1231         const char *hci_method;
1232         u32 dummy;
1233         bool bt_present;
1234         int ret = 0;
1235
1236         if (toshiba_acpi)
1237                 return -EBUSY;
1238
1239         pr_info("Toshiba Laptop ACPI Extras version %s\n",
1240                TOSHIBA_ACPI_VERSION);
1241
1242         hci_method = find_hci_method(acpi_dev->handle);
1243         if (!hci_method) {
1244                 pr_err("HCI interface not found\n");
1245                 return -ENODEV;
1246         }
1247
1248         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1249         if (!dev)
1250                 return -ENOMEM;
1251         dev->acpi_dev = acpi_dev;
1252         dev->method_hci = hci_method;
1253         acpi_dev->driver_data = dev;
1254
1255         if (toshiba_acpi_setup_keyboard(dev))
1256                 pr_info("Unable to activate hotkeys\n");
1257
1258         mutex_init(&dev->mutex);
1259
1260         ret = toshiba_acpi_setup_backlight(dev);
1261         if (ret)
1262                 goto error;
1263
1264         /* Register rfkill switch for Bluetooth */
1265         if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) {
1266                 dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth",
1267                                            &acpi_dev->dev,
1268                                            RFKILL_TYPE_BLUETOOTH,
1269                                            &toshiba_rfk_ops,
1270                                            dev);
1271                 if (!dev->bt_rfk) {
1272                         pr_err("unable to allocate rfkill device\n");
1273                         ret = -ENOMEM;
1274                         goto error;
1275                 }
1276
1277                 ret = rfkill_register(dev->bt_rfk);
1278                 if (ret) {
1279                         pr_err("unable to register rfkill device\n");
1280                         rfkill_destroy(dev->bt_rfk);
1281                         goto error;
1282                 }
1283         }
1284
1285         if (toshiba_illumination_available(dev)) {
1286                 dev->led_dev.name = "toshiba::illumination";
1287                 dev->led_dev.max_brightness = 1;
1288                 dev->led_dev.brightness_set = toshiba_illumination_set;
1289                 dev->led_dev.brightness_get = toshiba_illumination_get;
1290                 if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
1291                         dev->illumination_supported = 1;
1292         }
1293
1294         /* Determine whether or not BIOS supports fan and video interfaces */
1295
1296         ret = get_video_status(dev, &dummy);
1297         dev->video_supported = !ret;
1298
1299         ret = get_fan_status(dev, &dummy);
1300         dev->fan_supported = !ret;
1301
1302         create_toshiba_proc_entries(dev);
1303
1304         toshiba_acpi = dev;
1305
1306         return 0;
1307
1308 error:
1309         toshiba_acpi_remove(acpi_dev);
1310         return ret;
1311 }
1312
1313 static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event)
1314 {
1315         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1316         u32 hci_result, value;
1317         int retries = 3;
1318         int scancode;
1319
1320         if (event != 0x80)
1321                 return;
1322
1323         if (dev->info_supported) {
1324                 scancode = toshiba_acpi_query_hotkey(dev);
1325                 if (scancode < 0)
1326                         pr_err("Failed to query hotkey event\n");
1327                 else if (scancode != 0)
1328                         toshiba_acpi_report_hotkey(dev, scancode);
1329         } else if (dev->system_event_supported) {
1330                 do {
1331                         hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
1332                         switch (hci_result) {
1333                         case HCI_SUCCESS:
1334                                 toshiba_acpi_report_hotkey(dev, (int)value);
1335                                 break;
1336                         case HCI_NOT_SUPPORTED:
1337                                 /*
1338                                  * This is a workaround for an unresolved
1339                                  * issue on some machines where system events
1340                                  * sporadically become disabled.
1341                                  */
1342                                 hci_write1(dev, HCI_SYSTEM_EVENT, 1,
1343                                            &hci_result);
1344                                 pr_notice("Re-enabled hotkeys\n");
1345                                 /* fall through */
1346                         default:
1347                                 retries--;
1348                                 break;
1349                         }
1350                 } while (retries && hci_result != HCI_EMPTY);
1351         }
1352 }
1353
1354 #ifdef CONFIG_PM_SLEEP
1355 static int toshiba_acpi_suspend(struct device *device)
1356 {
1357         struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
1358         u32 result;
1359
1360         if (dev->hotkey_dev)
1361                 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_DISABLE, &result);
1362
1363         return 0;
1364 }
1365
1366 static int toshiba_acpi_resume(struct device *device)
1367 {
1368         struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
1369         u32 result;
1370
1371         if (dev->hotkey_dev)
1372                 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &result);
1373
1374         return 0;
1375 }
1376 #endif
1377
1378 static SIMPLE_DEV_PM_OPS(toshiba_acpi_pm,
1379                          toshiba_acpi_suspend, toshiba_acpi_resume);
1380
1381 static struct acpi_driver toshiba_acpi_driver = {
1382         .name   = "Toshiba ACPI driver",
1383         .owner  = THIS_MODULE,
1384         .ids    = toshiba_device_ids,
1385         .flags  = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1386         .ops    = {
1387                 .add            = toshiba_acpi_add,
1388                 .remove         = toshiba_acpi_remove,
1389                 .notify         = toshiba_acpi_notify,
1390         },
1391         .drv.pm = &toshiba_acpi_pm,
1392 };
1393
1394 static int __init toshiba_acpi_init(void)
1395 {
1396         int ret;
1397
1398         /*
1399          * Machines with this WMI guid aren't supported due to bugs in
1400          * their AML. This check relies on wmi initializing before
1401          * toshiba_acpi to guarantee guids have been identified.
1402          */
1403         if (wmi_has_guid(TOSHIBA_WMI_EVENT_GUID))
1404                 return -ENODEV;
1405
1406         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
1407         if (!toshiba_proc_dir) {
1408                 pr_err("Unable to create proc dir " PROC_TOSHIBA "\n");
1409                 return -ENODEV;
1410         }
1411
1412         ret = acpi_bus_register_driver(&toshiba_acpi_driver);
1413         if (ret) {
1414                 pr_err("Failed to register ACPI driver: %d\n", ret);
1415                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1416         }
1417
1418         return ret;
1419 }
1420
1421 static void __exit toshiba_acpi_exit(void)
1422 {
1423         acpi_bus_unregister_driver(&toshiba_acpi_driver);
1424         if (toshiba_proc_dir)
1425                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1426 }
1427
1428 module_init(toshiba_acpi_init);
1429 module_exit(toshiba_acpi_exit);