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  *  Copyright (C) 2014 Azael Avalos
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  *
  24  *
  25  *  The devolpment page for this driver is located at
  26  *  http://memebeam.org/toys/ToshibaAcpiDriver.
  27  *
  28  *  Credits:
  29  *      Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse
  30  *              engineering the Windows drivers
  31  *      Yasushi Nagato - changes for linux kernel 2.4 -> 2.5
  32  *      Rob Miller - TV out and hotkeys help
  33  *
  34  *
  35  *  TODO
  36  *
  37  */
  38
  39 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  40
  41 #define TOSHIBA_ACPI_VERSION    "0.20"
  42 #define PROC_INTERFACE_VERSION  1
  43
  44 #include <linux/kernel.h>
  45 #include <linux/module.h>
  46 #include <linux/init.h>
  47 #include <linux/types.h>
  48 #include <linux/proc_fs.h>
  49 #include <linux/seq_file.h>
  50 #include <linux/backlight.h>
  51 #include <linux/rfkill.h>
  52 #include <linux/input.h>
  53 #include <linux/input/sparse-keymap.h>
  54 #include <linux/leds.h>
  55 #include <linux/slab.h>
  56 #include <linux/workqueue.h>
  57 #include <linux/i8042.h>
  58 #include <linux/acpi.h>
  59 #include <linux/dmi.h>
  60 #include <asm/uaccess.h>
  61
  62 MODULE_AUTHOR("John Belmonte");
  63 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
  64 MODULE_LICENSE("GPL");
  65
  66 #define TOSHIBA_WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"
  67
  68 /* Scan code for Fn key on TOS1900 models */
  69 #define TOS1900_FN_SCAN         0x6e
  70
  71 /* Toshiba ACPI method paths */
  72 #define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
  73
  74 /* Toshiba HCI interface definitions
  75  *
  76  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
  77  * be uniform across all their models.  Ideally we would just call
  78  * dedicated ACPI methods instead of using this primitive interface.
  79  * However the ACPI methods seem to be incomplete in some areas (for
  80  * example they allow setting, but not reading, the LCD brightness value),
  81  * so this is still useful.
  82  *
  83  * SCI stands for "System Configuration Interface" which aim is to
  84  * conceal differences in hardware between different models.
  85  */
  86
  87 #define HCI_WORDS                       6
  88
  89 /* operations */
  90 #define HCI_SET                         0xff00
  91 #define HCI_GET                         0xfe00
  92 #define SCI_OPEN                        0xf100
  93 #define SCI_CLOSE                       0xf200
  94 #define SCI_GET                         0xf300
  95 #define SCI_SET                         0xf400
  96
  97 /* return codes */
  98 #define HCI_SUCCESS                     0x0000
  99 #define HCI_FAILURE                     0x1000
 100 #define HCI_NOT_SUPPORTED               0x8000
 101 #define HCI_EMPTY                       0x8c00
 102 #define HCI_DATA_NOT_AVAILABLE          0x8d20
 103 #define HCI_NOT_INITIALIZED             0x8d50
 104 #define SCI_OPEN_CLOSE_OK               0x0044
 105 #define SCI_ALREADY_OPEN                0x8100
 106 #define SCI_NOT_OPENED                  0x8200
 107 #define SCI_INPUT_DATA_ERROR            0x8300
 108 #define SCI_NOT_PRESENT                 0x8600
 109
 110 /* registers */
 111 #define HCI_FAN                         0x0004
 112 #define HCI_TR_BACKLIGHT                0x0005
 113 #define HCI_SYSTEM_EVENT                0x0016
 114 #define HCI_VIDEO_OUT                   0x001c
 115 #define HCI_HOTKEY_EVENT                0x001e
 116 #define HCI_LCD_BRIGHTNESS              0x002a
 117 #define HCI_WIRELESS                    0x0056
 118 #define HCI_ACCELEROMETER               0x006d
 119 #define HCI_KBD_ILLUMINATION            0x0095
 120 #define HCI_ECO_MODE                    0x0097
 121 #define HCI_ACCELEROMETER2              0x00a6
 122 #define SCI_ILLUMINATION                0x014e
 123 #define SCI_KBD_ILLUM_STATUS            0x015c
 124 #define SCI_TOUCHPAD                    0x050e
 125
 126 /* field definitions */
 127 #define HCI_ACCEL_MASK                  0x7fff
 128 #define HCI_HOTKEY_DISABLE              0x0b
 129 #define HCI_HOTKEY_ENABLE               0x09
 130 #define HCI_LCD_BRIGHTNESS_BITS         3
 131 #define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
 132 #define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
 133 #define HCI_MISC_SHIFT                  0x10
 134 #define HCI_VIDEO_OUT_LCD               0x1
 135 #define HCI_VIDEO_OUT_CRT               0x2
 136 #define HCI_VIDEO_OUT_TV                0x4
 137 #define HCI_WIRELESS_KILL_SWITCH        0x01
 138 #define HCI_WIRELESS_BT_PRESENT         0x0f
 139 #define HCI_WIRELESS_BT_ATTACH          0x40
 140 #define HCI_WIRELESS_BT_POWER           0x80
 141 #define SCI_KBD_MODE_FNZ                0x1
 142 #define SCI_KBD_MODE_AUTO               0x2
 143
 144 struct toshiba_acpi_dev {
 145         struct acpi_device *acpi_dev;
 146         const char *method_hci;
 147         struct rfkill *bt_rfk;
 148         struct input_dev *hotkey_dev;
 149         struct work_struct hotkey_work;
 150         struct backlight_device *backlight_dev;
 151         struct led_classdev led_dev;
 152         struct led_classdev kbd_led;
 153         struct led_classdev eco_led;
 154
 155         int force_fan;
 156         int last_key_event;
 157         int key_event_valid;
 158         int kbd_mode;
 159         int kbd_time;
 160
 161         unsigned int illumination_supported:1;
 162         unsigned int video_supported:1;
 163         unsigned int fan_supported:1;
 164         unsigned int system_event_supported:1;
 165         unsigned int ntfy_supported:1;
 166         unsigned int info_supported:1;
 167         unsigned int tr_backlight_supported:1;
 168         unsigned int kbd_illum_supported:1;
 169         unsigned int kbd_led_registered:1;
 170         unsigned int touchpad_supported:1;
 171         unsigned int eco_supported:1;
 172         unsigned int accelerometer_supported:1;
 173         unsigned int sysfs_created:1;
 174
 175         struct mutex mutex;
 176 };
 177
 178 static struct toshiba_acpi_dev *toshiba_acpi;
 179
 180 static const struct acpi_device_id toshiba_device_ids[] = {
 181         {"TOS6200", 0},
 182         {"TOS6208", 0},
 183         {"TOS1900", 0},
 184         {"", 0},
 185 };
 186 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
 187
 188 static const struct key_entry toshiba_acpi_keymap[] = {
 189         { KE_KEY, 0x9e, { KEY_RFKILL } },
 190         { KE_KEY, 0x101, { KEY_MUTE } },
 191         { KE_KEY, 0x102, { KEY_ZOOMOUT } },
 192         { KE_KEY, 0x103, { KEY_ZOOMIN } },
 193         { KE_KEY, 0x12c, { KEY_KBDILLUMTOGGLE } },
 194         { KE_KEY, 0x139, { KEY_ZOOMRESET } },
 195         { KE_KEY, 0x13b, { KEY_COFFEE } },
 196         { KE_KEY, 0x13c, { KEY_BATTERY } },
 197         { KE_KEY, 0x13d, { KEY_SLEEP } },
 198         { KE_KEY, 0x13e, { KEY_SUSPEND } },
 199         { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } },
 200         { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } },
 201         { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } },
 202         { KE_KEY, 0x142, { KEY_WLAN } },
 203         { KE_KEY, 0x143, { KEY_TOUCHPAD_TOGGLE } },
 204         { KE_KEY, 0x17f, { KEY_FN } },
 205         { KE_KEY, 0xb05, { KEY_PROG2 } },
 206         { KE_KEY, 0xb06, { KEY_WWW } },
 207         { KE_KEY, 0xb07, { KEY_MAIL } },
 208         { KE_KEY, 0xb30, { KEY_STOP } },
 209         { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } },
 210         { KE_KEY, 0xb32, { KEY_NEXTSONG } },
 211         { KE_KEY, 0xb33, { KEY_PLAYPAUSE } },
 212         { KE_KEY, 0xb5a, { KEY_MEDIA } },
 213         { KE_IGNORE, 0x1430, { KEY_RESERVED } },
 214         { KE_END, 0 },
 215 };
 216
 217 /* alternative keymap */
 218 static const struct dmi_system_id toshiba_alt_keymap_dmi[] = {
 219         {
 220                 .matches = {
 221                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 222                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite M840"),
 223                 },
 224         },
 225         {}
 226 };
 227
 228 static const struct key_entry toshiba_acpi_alt_keymap[] = {
 229         { KE_KEY, 0x157, { KEY_MUTE } },
 230         { KE_KEY, 0x102, { KEY_ZOOMOUT } },
 231         { KE_KEY, 0x103, { KEY_ZOOMIN } },
 232         { KE_KEY, 0x139, { KEY_ZOOMRESET } },
 233         { KE_KEY, 0x13e, { KEY_SWITCHVIDEOMODE } },
 234         { KE_KEY, 0x13c, { KEY_BRIGHTNESSDOWN } },
 235         { KE_KEY, 0x13d, { KEY_BRIGHTNESSUP } },
 236         { KE_KEY, 0x158, { KEY_WLAN } },
 237         { KE_KEY, 0x13f, { KEY_TOUCHPAD_TOGGLE } },
 238         { KE_END, 0 },
 239 };
 240
 241 /* utility
 242  */
 243
 244 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
 245 {
 246         *word = (*word & ~mask) | (mask * value);
 247 }
 248
 249 /* acpi interface wrappers
 250  */
 251
 252 static int write_acpi_int(const char *methodName, int val)
 253 {
 254         acpi_status status;
 255
 256         status = acpi_execute_simple_method(NULL, (char *)methodName, val);
 257         return (status == AE_OK) ? 0 : -EIO;
 258 }
 259
 260 /* Perform a raw HCI call.  Here we don't care about input or output buffer
 261  * format.
 262  */
 263 static acpi_status hci_raw(struct toshiba_acpi_dev *dev,
 264                            const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
 265 {
 266         struct acpi_object_list params;
 267         union acpi_object in_objs[HCI_WORDS];
 268         struct acpi_buffer results;
 269         union acpi_object out_objs[HCI_WORDS + 1];
 270         acpi_status status;
 271         int i;
 272
 273         params.count = HCI_WORDS;
 274         params.pointer = in_objs;
 275         for (i = 0; i < HCI_WORDS; ++i) {
 276                 in_objs[i].type = ACPI_TYPE_INTEGER;
 277                 in_objs[i].integer.value = in[i];
 278         }
 279
 280         results.length = sizeof(out_objs);
 281         results.pointer = out_objs;
 282
 283         status = acpi_evaluate_object(dev->acpi_dev->handle,
 284                                       (char *)dev->method_hci, &params,
 285                                       &results);
 286         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
 287                 for (i = 0; i < out_objs->package.count; ++i) {
 288                         out[i] = out_objs->package.elements[i].integer.value;
 289                 }
 290         }
 291
 292         return status;
 293 }
 294
 295 /* common hci tasks (get or set one or two value)
 296  *
 297  * In addition to the ACPI status, the HCI system returns a result which
 298  * may be useful (such as "not supported").
 299  */
 300
 301 static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg,
 302                               u32 in1, u32 *result)
 303 {
 304         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
 305         u32 out[HCI_WORDS];
 306         acpi_status status = hci_raw(dev, in, out);
 307         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 308         return status;
 309 }
 310
 311 static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg,
 312                              u32 *out1, u32 *result)
 313 {
 314         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
 315         u32 out[HCI_WORDS];
 316         acpi_status status = hci_raw(dev, in, out);
 317         *out1 = out[2];
 318         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 319         return status;
 320 }
 321
 322 static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg,
 323                               u32 in1, u32 in2, u32 *result)
 324 {
 325         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
 326         u32 out[HCI_WORDS];
 327         acpi_status status = hci_raw(dev, in, out);
 328         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 329         return status;
 330 }
 331
 332 static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg,
 333                              u32 *out1, u32 *out2, u32 *result)
 334 {
 335         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
 336         u32 out[HCI_WORDS];
 337         acpi_status status = hci_raw(dev, in, out);
 338         *out1 = out[2];
 339         *out2 = out[3];
 340         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 341         return status;
 342 }
 343
 344 /* common sci tasks
 345  */
 346
 347 static int sci_open(struct toshiba_acpi_dev *dev)
 348 {
 349         u32 in[HCI_WORDS] = { SCI_OPEN, 0, 0, 0, 0, 0 };
 350         u32 out[HCI_WORDS];
 351         acpi_status status;
 352
 353         status = hci_raw(dev, in, out);
 354         if  (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
 355                 pr_err("ACPI call to open SCI failed\n");
 356                 return 0;
 357         }
 358
 359         if (out[0] == SCI_OPEN_CLOSE_OK) {
 360                 return 1;
 361         } else if (out[0] == SCI_ALREADY_OPEN) {
 362                 pr_info("Toshiba SCI already opened\n");
 363                 return 1;
 364         } else if (out[0] == SCI_NOT_PRESENT) {
 365                 pr_info("Toshiba SCI is not present\n");
 366         }
 367
 368         return 0;
 369 }
 370
 371 static void sci_close(struct toshiba_acpi_dev *dev)
 372 {
 373         u32 in[HCI_WORDS] = { SCI_CLOSE, 0, 0, 0, 0, 0 };
 374         u32 out[HCI_WORDS];
 375         acpi_status status;
 376
 377         status = hci_raw(dev, in, out);
 378         if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
 379                 pr_err("ACPI call to close SCI failed\n");
 380                 return;
 381         }
 382
 383         if (out[0] == SCI_OPEN_CLOSE_OK)
 384                 return;
 385         else if (out[0] == SCI_NOT_OPENED)
 386                 pr_info("Toshiba SCI not opened\n");
 387         else if (out[0] == SCI_NOT_PRESENT)
 388                 pr_info("Toshiba SCI is not present\n");
 389 }
 390
 391 static acpi_status sci_read(struct toshiba_acpi_dev *dev, u32 reg,
 392                             u32 *out1, u32 *result)
 393 {
 394         u32 in[HCI_WORDS] = { SCI_GET, reg, 0, 0, 0, 0 };
 395         u32 out[HCI_WORDS];
 396         acpi_status status = hci_raw(dev, in, out);
 397         *out1 = out[2];
 398         *result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE;
 399         return status;
 400 }
 401
 402 static acpi_status sci_write(struct toshiba_acpi_dev *dev, u32 reg,
 403                              u32 in1, u32 *result)
 404 {
 405         u32 in[HCI_WORDS] = { SCI_SET, reg, in1, 0, 0, 0 };
 406         u32 out[HCI_WORDS];
 407         acpi_status status = hci_raw(dev, in, out);
 408         *result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE;
 409         return status;
 410 }
 411
 412 /* Illumination support */
 413 static int toshiba_illumination_available(struct toshiba_acpi_dev *dev)
 414 {
 415         u32 in[HCI_WORDS] = { SCI_GET, SCI_ILLUMINATION, 0, 0, 0, 0 };
 416         u32 out[HCI_WORDS];
 417         acpi_status status;
 418
 419         if (!sci_open(dev))
 420                 return 0;
 421
 422         status = hci_raw(dev, in, out);
 423         sci_close(dev);
 424         if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
 425                 pr_err("ACPI call to query Illumination support failed\n");
 426                 return 0;
 427         } else if (out[0] == HCI_NOT_SUPPORTED || out[1] != 1) {
 428                 pr_info("Illumination device not available\n");
 429                 return 0;
 430         }
 431
 432         return 1;
 433 }
 434
 435 static void toshiba_illumination_set(struct led_classdev *cdev,
 436                                      enum led_brightness brightness)
 437 {
 438         struct toshiba_acpi_dev *dev = container_of(cdev,
 439                         struct toshiba_acpi_dev, led_dev);
 440         u32 state, result;
 441         acpi_status status;
 442
 443         /* First request : initialize communication. */
 444         if (!sci_open(dev))
 445                 return;
 446
 447         /* Switch the illumination on/off */
 448         state = brightness ? 1 : 0;
 449         status = sci_write(dev, SCI_ILLUMINATION, state, &result);
 450         sci_close(dev);
 451         if (ACPI_FAILURE(status)) {
 452                 pr_err("ACPI call for illumination failed\n");
 453                 return;
 454         } else if (result == HCI_NOT_SUPPORTED) {
 455                 pr_info("Illumination not supported\n");
 456                 return;
 457         }
 458 }
 459
 460 static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
 461 {
 462         struct toshiba_acpi_dev *dev = container_of(cdev,
 463                         struct toshiba_acpi_dev, led_dev);
 464         u32 state, result;
 465         acpi_status status;
 466
 467         /* First request : initialize communication. */
 468         if (!sci_open(dev))
 469                 return LED_OFF;
 470
 471         /* Check the illumination */
 472         status = sci_read(dev, SCI_ILLUMINATION, &state, &result);
 473         sci_close(dev);
 474         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
 475                 pr_err("ACPI call for illumination failed\n");
 476                 return LED_OFF;
 477         } else if (result == HCI_NOT_SUPPORTED) {
 478                 pr_info("Illumination not supported\n");
 479                 return LED_OFF;
 480         }
 481
 482         return state ? LED_FULL : LED_OFF;
 483 }
 484
 485 /* KBD Illumination */
 486 static int toshiba_kbd_illum_status_set(struct toshiba_acpi_dev *dev, u32 time)
 487 {
 488         u32 result;
 489         acpi_status status;
 490
 491         if (!sci_open(dev))
 492                 return -EIO;
 493
 494         status = sci_write(dev, SCI_KBD_ILLUM_STATUS, time, &result);
 495         sci_close(dev);
 496         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
 497                 pr_err("ACPI call to set KBD backlight status failed\n");
 498                 return -EIO;
 499         } else if (result == HCI_NOT_SUPPORTED) {
 500                 pr_info("Keyboard backlight status not supported\n");
 501                 return -ENODEV;
 502         }
 503
 504         return 0;
 505 }
 506
 507 static int toshiba_kbd_illum_status_get(struct toshiba_acpi_dev *dev, u32 *time)
 508 {
 509         u32 result;
 510         acpi_status status;
 511
 512         if (!sci_open(dev))
 513                 return -EIO;
 514
 515         status = sci_read(dev, SCI_KBD_ILLUM_STATUS, time, &result);
 516         sci_close(dev);
 517         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
 518                 pr_err("ACPI call to get KBD backlight status failed\n");
 519                 return -EIO;
 520         } else if (result == HCI_NOT_SUPPORTED) {
 521                 pr_info("Keyboard backlight status not supported\n");
 522                 return -ENODEV;
 523         }
 524
 525         return 0;
 526 }
 527
 528 static enum led_brightness toshiba_kbd_backlight_get(struct led_classdev *cdev)
 529 {
 530         struct toshiba_acpi_dev *dev = container_of(cdev,
 531                         struct toshiba_acpi_dev, kbd_led);
 532         u32 state, result;
 533         acpi_status status;
 534
 535         /* Check the keyboard backlight state */
 536         status = hci_read1(dev, HCI_KBD_ILLUMINATION, &state, &result);
 537         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
 538                 pr_err("ACPI call to get the keyboard backlight failed\n");
 539                 return LED_OFF;
 540         } else if (result == HCI_NOT_SUPPORTED) {
 541                 pr_info("Keyboard backlight not supported\n");
 542                 return LED_OFF;
 543         }
 544
 545         return state ? LED_FULL : LED_OFF;
 546 }
 547
 548 static void toshiba_kbd_backlight_set(struct led_classdev *cdev,
 549                                      enum led_brightness brightness)
 550 {
 551         struct toshiba_acpi_dev *dev = container_of(cdev,
 552                         struct toshiba_acpi_dev, kbd_led);
 553         u32 state, result;
 554         acpi_status status;
 555
 556         /* Set the keyboard backlight state */
 557         state = brightness ? 1 : 0;
 558         status = hci_write1(dev, HCI_KBD_ILLUMINATION, state, &result);
 559         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
 560                 pr_err("ACPI call to set KBD Illumination mode failed\n");
 561                 return;
 562         } else if (result == HCI_NOT_SUPPORTED) {
 563                 pr_info("Keyboard backlight not supported\n");
 564                 return;
 565         }
 566 }
 567
 568 /* TouchPad support */
 569 static int toshiba_touchpad_set(struct toshiba_acpi_dev *dev, u32 state)
 570 {
 571         u32 result;
 572         acpi_status status;
 573
 574         if (!sci_open(dev))
 575                 return -EIO;
 576
 577         status = sci_write(dev, SCI_TOUCHPAD, state, &result);
 578         sci_close(dev);
 579         if (ACPI_FAILURE(status)) {
 580                 pr_err("ACPI call to set the touchpad failed\n");
 581                 return -EIO;
 582         } else if (result == HCI_NOT_SUPPORTED) {
 583                 return -ENODEV;
 584         }
 585
 586         return 0;
 587 }
 588
 589 static int toshiba_touchpad_get(struct toshiba_acpi_dev *dev, u32 *state)
 590 {
 591         u32 result;
 592         acpi_status status;
 593
 594         if (!sci_open(dev))
 595                 return -EIO;
 596
 597         status = sci_read(dev, SCI_TOUCHPAD, state, &result);
 598         sci_close(dev);
 599         if (ACPI_FAILURE(status)) {
 600                 pr_err("ACPI call to query the touchpad failed\n");
 601                 return -EIO;
 602         } else if (result == HCI_NOT_SUPPORTED) {
 603                 return -ENODEV;
 604         }
 605
 606         return 0;
 607 }
 608
 609 /* Eco Mode support */
 610 static int toshiba_eco_mode_available(struct toshiba_acpi_dev *dev)
 611 {
 612         acpi_status status;
 613         u32 in[HCI_WORDS] = { HCI_GET, HCI_ECO_MODE, 0, 1, 0, 0 };
 614         u32 out[HCI_WORDS];
 615
 616         status = hci_raw(dev, in, out);
 617         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
 618                 pr_info("ACPI call to get ECO led failed\n");
 619                 return 0;
 620         }
 621
 622         return 1;
 623 }
 624
 625 static enum led_brightness toshiba_eco_mode_get_status(struct led_classdev *cdev)
 626 {
 627         struct toshiba_acpi_dev *dev = container_of(cdev,
 628                         struct toshiba_acpi_dev, eco_led);
 629         u32 in[HCI_WORDS] = { HCI_GET, HCI_ECO_MODE, 0, 1, 0, 0 };
 630         u32 out[HCI_WORDS];
 631         acpi_status status;
 632
 633         status = hci_raw(dev, in, out);
 634         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
 635                 pr_err("ACPI call to get ECO led failed\n");
 636                 return LED_OFF;
 637         }
 638
 639         return out[2] ? LED_FULL : LED_OFF;
 640 }
 641
 642 static void toshiba_eco_mode_set_status(struct led_classdev *cdev,
 643                                      enum led_brightness brightness)
 644 {
 645         struct toshiba_acpi_dev *dev = container_of(cdev,
 646                         struct toshiba_acpi_dev, eco_led);
 647         u32 in[HCI_WORDS] = { HCI_SET, HCI_ECO_MODE, 0, 1, 0, 0 };
 648         u32 out[HCI_WORDS];
 649         acpi_status status;
 650
 651         /* Switch the Eco Mode led on/off */
 652         in[2] = (brightness) ? 1 : 0;
 653         status = hci_raw(dev, in, out);
 654         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
 655                 pr_err("ACPI call to set ECO led failed\n");
 656                 return;
 657         }
 658 }
 659
 660 /* Accelerometer support */
 661 static int toshiba_accelerometer_supported(struct toshiba_acpi_dev *dev)
 662 {
 663         u32 in[HCI_WORDS] = { HCI_GET, HCI_ACCELEROMETER2, 0, 0, 0, 0 };
 664         u32 out[HCI_WORDS];
 665         acpi_status status;
 666
 667         /* Check if the accelerometer call exists,
 668          * this call also serves as initialization
 669          */
 670         status = hci_raw(dev, in, out);
 671         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
 672                 pr_err("ACPI call to query the accelerometer failed\n");
 673                 return -EIO;
 674         } else if (out[0] == HCI_DATA_NOT_AVAILABLE ||
 675                    out[0] == HCI_NOT_INITIALIZED) {
 676                 pr_err("Accelerometer not initialized\n");
 677                 return -EIO;
 678         } else if (out[0] == HCI_NOT_SUPPORTED) {
 679                 pr_info("Accelerometer not supported\n");
 680                 return -ENODEV;
 681         }
 682
 683         return 0;
 684 }
 685
 686 static int toshiba_accelerometer_get(struct toshiba_acpi_dev *dev,
 687                                       u32 *xy, u32 *z)
 688 {
 689         u32 in[HCI_WORDS] = { HCI_GET, HCI_ACCELEROMETER, 0, 1, 0, 0 };
 690         u32 out[HCI_WORDS];
 691         acpi_status status;
 692
 693         /* Check the Accelerometer status */
 694         status = hci_raw(dev, in, out);
 695         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
 696                 pr_err("ACPI call to query the accelerometer failed\n");
 697                 return -EIO;
 698         }
 699
 700         *xy = out[2];
 701         *z = out[4];
 702
 703         return 0;
 704 }
 705
 706 /* Bluetooth rfkill handlers */
 707
 708 static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)
 709 {
 710         u32 hci_result;
 711         u32 value, value2;
 712
 713         value = 0;
 714         value2 = 0;
 715         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
 716         if (hci_result == HCI_SUCCESS)
 717                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
 718
 719         return hci_result;
 720 }
 721
 722 static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state)
 723 {
 724         u32 hci_result;
 725         u32 value, value2;
 726
 727         value = 0;
 728         value2 = 0x0001;
 729         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
 730
 731         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
 732         return hci_result;
 733 }
 734
 735 static int bt_rfkill_set_block(void *data, bool blocked)
 736 {
 737         struct toshiba_acpi_dev *dev = data;
 738         u32 result1, result2;
 739         u32 value;
 740         int err;
 741         bool radio_state;
 742
 743         value = (blocked == false);
 744
 745         mutex_lock(&dev->mutex);
 746         if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) {
 747                 err = -EIO;
 748                 goto out;
 749         }
 750
 751         if (!radio_state) {
 752                 err = 0;
 753                 goto out;
 754         }
 755
 756         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
 757         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
 758
 759         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
 760                 err = -EIO;
 761         else
 762                 err = 0;
 763  out:
 764         mutex_unlock(&dev->mutex);
 765         return err;
 766 }
 767
 768 static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
 769 {
 770         bool new_rfk_state;
 771         bool value;
 772         u32 hci_result;
 773         struct toshiba_acpi_dev *dev = data;
 774
 775         mutex_lock(&dev->mutex);
 776
 777         hci_result = hci_get_radio_state(dev, &value);
 778         if (hci_result != HCI_SUCCESS) {
 779                 /* Can't do anything useful */
 780                 mutex_unlock(&dev->mutex);
 781                 return;
 782         }
 783
 784         new_rfk_state = value;
 785
 786         mutex_unlock(&dev->mutex);
 787
 788         if (rfkill_set_hw_state(rfkill, !new_rfk_state))
 789                 bt_rfkill_set_block(data, true);
 790 }
 791
 792 static const struct rfkill_ops toshiba_rfk_ops = {
 793         .set_block = bt_rfkill_set_block,
 794         .poll = bt_rfkill_poll,
 795 };
 796
 797 static int get_tr_backlight_status(struct toshiba_acpi_dev *dev, bool *enabled)
 798 {
 799         u32 hci_result;
 800         u32 status;
 801
 802         hci_read1(dev, HCI_TR_BACKLIGHT, &status, &hci_result);
 803         *enabled = !status;
 804         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 805 }
 806
 807 static int set_tr_backlight_status(struct toshiba_acpi_dev *dev, bool enable)
 808 {
 809         u32 hci_result;
 810         u32 value = !enable;
 811
 812         hci_write1(dev, HCI_TR_BACKLIGHT, value, &hci_result);
 813         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 814 }
 815
 816 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
 817
 818 static int __get_lcd_brightness(struct toshiba_acpi_dev *dev)
 819 {
 820         u32 hci_result;
 821         u32 value;
 822         int brightness = 0;
 823
 824         if (dev->tr_backlight_supported) {
 825                 bool enabled;
 826                 int ret = get_tr_backlight_status(dev, &enabled);
 827                 if (ret)
 828                         return ret;
 829                 if (enabled)
 830                         return 0;
 831                 brightness++;
 832         }
 833
 834         hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result);
 835         if (hci_result == HCI_SUCCESS)
 836                 return brightness + (value >> HCI_LCD_BRIGHTNESS_SHIFT);
 837
 838         return -EIO;
 839 }
 840
 841 static int get_lcd_brightness(struct backlight_device *bd)
 842 {
 843         struct toshiba_acpi_dev *dev = bl_get_data(bd);
 844         return __get_lcd_brightness(dev);
 845 }
 846
 847 static int lcd_proc_show(struct seq_file *m, void *v)
 848 {
 849         struct toshiba_acpi_dev *dev = m->private;
 850         int value;
 851         int levels;
 852
 853         if (!dev->backlight_dev)
 854                 return -ENODEV;
 855
 856         levels = dev->backlight_dev->props.max_brightness + 1;
 857         value = get_lcd_brightness(dev->backlight_dev);
 858         if (value >= 0) {
 859                 seq_printf(m, "brightness:              %d\n", value);
 860                 seq_printf(m, "brightness_levels:       %d\n", levels);
 861                 return 0;
 862         }
 863
 864         pr_err("Error reading LCD brightness\n");
 865         return -EIO;
 866 }
 867
 868 static int lcd_proc_open(struct inode *inode, struct file *file)
 869 {
 870         return single_open(file, lcd_proc_show, PDE_DATA(inode));
 871 }
 872
 873 static int set_lcd_brightness(struct toshiba_acpi_dev *dev, int value)
 874 {
 875         u32 in[HCI_WORDS] = { HCI_SET, HCI_LCD_BRIGHTNESS, 0, 0, 0, 0 };
 876         u32 out[HCI_WORDS];
 877         acpi_status status;
 878
 879         if (dev->tr_backlight_supported) {
 880                 bool enable = !value;
 881                 int ret = set_tr_backlight_status(dev, enable);
 882                 if (ret)
 883                         return ret;
 884                 if (value)
 885                         value--;
 886         }
 887
 888         in[2] = value << HCI_LCD_BRIGHTNESS_SHIFT;
 889         status = hci_raw(dev, in, out);
 890         if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
 891                 pr_err("ACPI call to set brightness failed");
 892                 return -EIO;
 893         }
 894         /* Extra check for "incomplete" backlight method, where the AML code
 895          * doesn't check for HCI_SET or HCI_GET and returns HCI_SUCCESS,
 896          * the actual brightness, and in some cases the max brightness.
 897          */
 898         if (out[2] > 0  || out[3] == 0xE000)
 899                 return -ENODEV;
 900
 901         return out[0] == HCI_SUCCESS ? 0 : -EIO;
 902 }
 903
 904 static int set_lcd_status(struct backlight_device *bd)
 905 {
 906         struct toshiba_acpi_dev *dev = bl_get_data(bd);
 907         return set_lcd_brightness(dev, bd->props.brightness);
 908 }
 909
 910 static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
 911                               size_t count, loff_t *pos)
 912 {
 913         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
 914         char cmd[42];
 915         size_t len;
 916         int value;
 917         int ret;
 918         int levels = dev->backlight_dev->props.max_brightness + 1;
 919
 920         len = min(count, sizeof(cmd) - 1);
 921         if (copy_from_user(cmd, buf, len))
 922                 return -EFAULT;
 923         cmd[len] = '\0';
 924
 925         if (sscanf(cmd, " brightness : %i", &value) == 1 &&
 926             value >= 0 && value < levels) {
 927                 ret = set_lcd_brightness(dev, value);
 928                 if (ret == 0)
 929                         ret = count;
 930         } else {
 931                 ret = -EINVAL;
 932         }
 933         return ret;
 934 }
 935
 936 static const struct file_operations lcd_proc_fops = {
 937         .owner          = THIS_MODULE,
 938         .open           = lcd_proc_open,
 939         .read           = seq_read,
 940         .llseek         = seq_lseek,
 941         .release        = single_release,
 942         .write          = lcd_proc_write,
 943 };
 944
 945 static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status)
 946 {
 947         u32 hci_result;
 948
 949         hci_read1(dev, HCI_VIDEO_OUT, status, &hci_result);
 950         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 951 }
 952
 953 static int video_proc_show(struct seq_file *m, void *v)
 954 {
 955         struct toshiba_acpi_dev *dev = m->private;
 956         u32 value;
 957         int ret;
 958
 959         ret = get_video_status(dev, &value);
 960         if (!ret) {
 961                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
 962                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
 963                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
 964                 seq_printf(m, "lcd_out:                 %d\n", is_lcd);
 965                 seq_printf(m, "crt_out:                 %d\n", is_crt);
 966                 seq_printf(m, "tv_out:                  %d\n", is_tv);
 967         }
 968
 969         return ret;
 970 }
 971
 972 static int video_proc_open(struct inode *inode, struct file *file)
 973 {
 974         return single_open(file, video_proc_show, PDE_DATA(inode));
 975 }
 976
 977 static ssize_t video_proc_write(struct file *file, const char __user *buf,
 978                                 size_t count, loff_t *pos)
 979 {
 980         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
 981         char *cmd, *buffer;
 982         int ret;
 983         int value;
 984         int remain = count;
 985         int lcd_out = -1;
 986         int crt_out = -1;
 987         int tv_out = -1;
 988         u32 video_out;
 989
 990         cmd = kmalloc(count + 1, GFP_KERNEL);
 991         if (!cmd)
 992                 return -ENOMEM;
 993         if (copy_from_user(cmd, buf, count)) {
 994                 kfree(cmd);
 995                 return -EFAULT;
 996         }
 997         cmd[count] = '\0';
 998
 999         buffer = cmd;
1000
1001         /* scan expression.  Multiple expressions may be delimited with ;
1002          *
1003          *  NOTE: to keep scanning simple, invalid fields are ignored
1004          */
1005         while (remain) {
1006                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
1007                         lcd_out = value & 1;
1008                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
1009                         crt_out = value & 1;
1010                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
1011                         tv_out = value & 1;
1012                 /* advance to one character past the next ; */
1013                 do {
1014                         ++buffer;
1015                         --remain;
1016                 }
1017                 while (remain && *(buffer - 1) != ';');
1018         }
1019
1020         kfree(cmd);
1021
1022         ret = get_video_status(dev, &video_out);
1023         if (!ret) {
1024                 unsigned int new_video_out = video_out;
1025                 if (lcd_out != -1)
1026                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
1027                 if (crt_out != -1)
1028                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
1029                 if (tv_out != -1)
1030                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
1031                 /* To avoid unnecessary video disruption, only write the new
1032                  * video setting if something changed. */
1033                 if (new_video_out != video_out)
1034                         ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
1035         }
1036
1037         return ret ? ret : count;
1038 }
1039
1040 static const struct file_operations video_proc_fops = {
1041         .owner          = THIS_MODULE,
1042         .open           = video_proc_open,
1043         .read           = seq_read,
1044         .llseek         = seq_lseek,
1045         .release        = single_release,
1046         .write          = video_proc_write,
1047 };
1048
1049 static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status)
1050 {
1051         u32 hci_result;
1052
1053         hci_read1(dev, HCI_FAN, status, &hci_result);
1054         return hci_result == HCI_SUCCESS ? 0 : -EIO;
1055 }
1056
1057 static int fan_proc_show(struct seq_file *m, void *v)
1058 {
1059         struct toshiba_acpi_dev *dev = m->private;
1060         int ret;
1061         u32 value;
1062
1063         ret = get_fan_status(dev, &value);
1064         if (!ret) {
1065                 seq_printf(m, "running:                 %d\n", (value > 0));
1066                 seq_printf(m, "force_on:                %d\n", dev->force_fan);
1067         }
1068
1069         return ret;
1070 }
1071
1072 static int fan_proc_open(struct inode *inode, struct file *file)
1073 {
1074         return single_open(file, fan_proc_show, PDE_DATA(inode));
1075 }
1076
1077 static ssize_t fan_proc_write(struct file *file, const char __user *buf,
1078                               size_t count, loff_t *pos)
1079 {
1080         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
1081         char cmd[42];
1082         size_t len;
1083         int value;
1084         u32 hci_result;
1085
1086         len = min(count, sizeof(cmd) - 1);
1087         if (copy_from_user(cmd, buf, len))
1088                 return -EFAULT;
1089         cmd[len] = '\0';
1090
1091         if (sscanf(cmd, " force_on : %i", &value) == 1 &&
1092             value >= 0 && value <= 1) {
1093                 hci_write1(dev, HCI_FAN, value, &hci_result);
1094                 if (hci_result != HCI_SUCCESS)
1095                         return -EIO;
1096                 else
1097                         dev->force_fan = value;
1098         } else {
1099                 return -EINVAL;
1100         }
1101
1102         return count;
1103 }
1104
1105 static const struct file_operations fan_proc_fops = {
1106         .owner          = THIS_MODULE,
1107         .open           = fan_proc_open,
1108         .read           = seq_read,
1109         .llseek         = seq_lseek,
1110         .release        = single_release,
1111         .write          = fan_proc_write,
1112 };
1113
1114 static int keys_proc_show(struct seq_file *m, void *v)
1115 {
1116         struct toshiba_acpi_dev *dev = m->private;
1117         u32 hci_result;
1118         u32 value;
1119
1120         if (!dev->key_event_valid && dev->system_event_supported) {
1121                 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
1122                 if (hci_result == HCI_SUCCESS) {
1123                         dev->key_event_valid = 1;
1124                         dev->last_key_event = value;
1125                 } else if (hci_result == HCI_EMPTY) {
1126                         /* better luck next time */
1127                 } else if (hci_result == HCI_NOT_SUPPORTED) {
1128                         /* This is a workaround for an unresolved issue on
1129                          * some machines where system events sporadically
1130                          * become disabled. */
1131                         hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
1132                         pr_notice("Re-enabled hotkeys\n");
1133                 } else {
1134                         pr_err("Error reading hotkey status\n");
1135                         return -EIO;
1136                 }
1137         }
1138
1139         seq_printf(m, "hotkey_ready:            %d\n", dev->key_event_valid);
1140         seq_printf(m, "hotkey:                  0x%04x\n", dev->last_key_event);
1141         return 0;
1142 }
1143
1144 static int keys_proc_open(struct inode *inode, struct file *file)
1145 {
1146         return single_open(file, keys_proc_show, PDE_DATA(inode));
1147 }
1148
1149 static ssize_t keys_proc_write(struct file *file, const char __user *buf,
1150                                size_t count, loff_t *pos)
1151 {
1152         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
1153         char cmd[42];
1154         size_t len;
1155         int value;
1156
1157         len = min(count, sizeof(cmd) - 1);
1158         if (copy_from_user(cmd, buf, len))
1159                 return -EFAULT;
1160         cmd[len] = '\0';
1161
1162         if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
1163                 dev->key_event_valid = 0;
1164         } else {
1165                 return -EINVAL;
1166         }
1167
1168         return count;
1169 }
1170
1171 static const struct file_operations keys_proc_fops = {
1172         .owner          = THIS_MODULE,
1173         .open           = keys_proc_open,
1174         .read           = seq_read,
1175         .llseek         = seq_lseek,
1176         .release        = single_release,
1177         .write          = keys_proc_write,
1178 };
1179
1180 static int version_proc_show(struct seq_file *m, void *v)
1181 {
1182         seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
1183         seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
1184         return 0;
1185 }
1186
1187 static int version_proc_open(struct inode *inode, struct file *file)
1188 {
1189         return single_open(file, version_proc_show, PDE_DATA(inode));
1190 }
1191
1192 static const struct file_operations version_proc_fops = {
1193         .owner          = THIS_MODULE,
1194         .open           = version_proc_open,
1195         .read           = seq_read,
1196         .llseek         = seq_lseek,
1197         .release        = single_release,
1198 };
1199
1200 /* proc and module init
1201  */
1202
1203 #define PROC_TOSHIBA            "toshiba"
1204
1205 static void create_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
1206 {
1207         if (dev->backlight_dev)
1208                 proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1209                                  &lcd_proc_fops, dev);
1210         if (dev->video_supported)
1211                 proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1212                                  &video_proc_fops, dev);
1213         if (dev->fan_supported)
1214                 proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1215                                  &fan_proc_fops, dev);
1216         if (dev->hotkey_dev)
1217                 proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1218                                  &keys_proc_fops, dev);
1219         proc_create_data("version", S_IRUGO, toshiba_proc_dir,
1220                          &version_proc_fops, dev);
1221 }
1222
1223 static void remove_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
1224 {
1225         if (dev->backlight_dev)
1226                 remove_proc_entry("lcd", toshiba_proc_dir);
1227         if (dev->video_supported)
1228                 remove_proc_entry("video", toshiba_proc_dir);
1229         if (dev->fan_supported)
1230                 remove_proc_entry("fan", toshiba_proc_dir);
1231         if (dev->hotkey_dev)
1232                 remove_proc_entry("keys", toshiba_proc_dir);
1233         remove_proc_entry("version", toshiba_proc_dir);
1234 }
1235
1236 static const struct backlight_ops toshiba_backlight_data = {
1237         .options = BL_CORE_SUSPENDRESUME,
1238         .get_brightness = get_lcd_brightness,
1239         .update_status  = set_lcd_status,
1240 };
1241
1242 /*
1243  * Sysfs files
1244  */
1245
1246 static ssize_t toshiba_kbd_bl_mode_store(struct device *dev,
1247                                          struct device_attribute *attr,
1248                                          const char *buf, size_t count)
1249 {
1250         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1251         int mode = -1;
1252         int time = -1;
1253
1254         if (sscanf(buf, "%i", &mode) != 1  || (mode != 2 || mode != 1))
1255                 return -EINVAL;
1256
1257         /* Set the Keyboard Backlight Mode where:
1258          * Mode - Auto (2) | FN-Z (1)
1259          *      Auto - KBD backlight turns off automatically in given time
1260          *      FN-Z - KBD backlight "toggles" when hotkey pressed
1261          */
1262         if (mode != -1 && toshiba->kbd_mode != mode) {
1263                 time = toshiba->kbd_time << HCI_MISC_SHIFT;
1264                 time = time + toshiba->kbd_mode;
1265                 if (toshiba_kbd_illum_status_set(toshiba, time) < 0)
1266                         return -EIO;
1267                 toshiba->kbd_mode = mode;
1268         }
1269
1270         return count;
1271 }
1272
1273 static ssize_t toshiba_kbd_bl_mode_show(struct device *dev,
1274                                         struct device_attribute *attr,
1275                                         char *buf)
1276 {
1277         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1278         u32 time;
1279
1280         if (toshiba_kbd_illum_status_get(toshiba, &time) < 0)
1281                 return -EIO;
1282
1283         return sprintf(buf, "%i\n", time & 0x07);
1284 }
1285
1286 static ssize_t toshiba_kbd_bl_timeout_store(struct device *dev,
1287                                             struct device_attribute *attr,
1288                                             const char *buf, size_t count)
1289 {
1290         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1291         int time = -1;
1292
1293         if (sscanf(buf, "%i", &time) != 1 && (time < 0 || time > 60))
1294                 return -EINVAL;
1295
1296         /* Set the Keyboard Backlight Timeout: 0-60 seconds */
1297         if (time != -1 && toshiba->kbd_time != time) {
1298                 time = time << HCI_MISC_SHIFT;
1299                 time = (toshiba->kbd_mode == SCI_KBD_MODE_AUTO) ?
1300                                                         time + 1 : time + 2;
1301                 if (toshiba_kbd_illum_status_set(toshiba, time) < 0)
1302                         return -EIO;
1303                 toshiba->kbd_time = time >> HCI_MISC_SHIFT;
1304         }
1305
1306         return count;
1307 }
1308
1309 static ssize_t toshiba_kbd_bl_timeout_show(struct device *dev,
1310                                            struct device_attribute *attr,
1311                                            char *buf)
1312 {
1313         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1314         u32 time;
1315
1316         if (toshiba_kbd_illum_status_get(toshiba, &time) < 0)
1317                 return -EIO;
1318
1319         return sprintf(buf, "%i\n", time >> HCI_MISC_SHIFT);
1320 }
1321
1322 static ssize_t toshiba_touchpad_store(struct device *dev,
1323                                       struct device_attribute *attr,
1324                                       const char *buf, size_t count)
1325 {
1326         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1327         int state;
1328
1329         /* Set the TouchPad on/off, 0 - Disable | 1 - Enable */
1330         if (sscanf(buf, "%i", &state) == 1 && (state == 0 || state == 1)) {
1331                 if (toshiba_touchpad_set(toshiba, state) < 0)
1332                         return -EIO;
1333         }
1334
1335         return count;
1336 }
1337
1338 static ssize_t toshiba_touchpad_show(struct device *dev,
1339                                      struct device_attribute *attr, char *buf)
1340 {
1341         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1342         u32 state;
1343         int ret;
1344
1345         ret = toshiba_touchpad_get(toshiba, &state);
1346         if (ret < 0)
1347                 return ret;
1348
1349         return sprintf(buf, "%i\n", state);
1350 }
1351
1352 static ssize_t toshiba_position_show(struct device *dev,
1353                                      struct device_attribute *attr, char *buf)
1354 {
1355         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1356         u32 xyval, zval, tmp;
1357         u16 x, y, z;
1358         int ret;
1359
1360         xyval = zval = 0;
1361         ret = toshiba_accelerometer_get(toshiba, &xyval, &zval);
1362         if (ret < 0)
1363                 return ret;
1364
1365         x = xyval & HCI_ACCEL_MASK;
1366         tmp = xyval >> HCI_MISC_SHIFT;
1367         y = tmp & HCI_ACCEL_MASK;
1368         z = zval & HCI_ACCEL_MASK;
1369
1370         return sprintf(buf, "%d %d %d\n", x, y, z);
1371 }
1372
1373 static DEVICE_ATTR(kbd_backlight_mode, S_IRUGO | S_IWUSR,
1374                    toshiba_kbd_bl_mode_show, toshiba_kbd_bl_mode_store);
1375 static DEVICE_ATTR(kbd_backlight_timeout, S_IRUGO | S_IWUSR,
1376                    toshiba_kbd_bl_timeout_show, toshiba_kbd_bl_timeout_store);
1377 static DEVICE_ATTR(touchpad, S_IRUGO | S_IWUSR,
1378                    toshiba_touchpad_show, toshiba_touchpad_store);
1379 static DEVICE_ATTR(position, S_IRUGO, toshiba_position_show, NULL);
1380
1381 static struct attribute *toshiba_attributes[] = {
1382         &dev_attr_kbd_backlight_mode.attr,
1383         &dev_attr_kbd_backlight_timeout.attr,
1384         &dev_attr_touchpad.attr,
1385         &dev_attr_position.attr,
1386         NULL,
1387 };
1388
1389 static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,
1390                                         struct attribute *attr, int idx)
1391 {
1392         struct device *dev = container_of(kobj, struct device, kobj);
1393         struct toshiba_acpi_dev *drv = dev_get_drvdata(dev);
1394         bool exists = true;
1395
1396         if (attr == &dev_attr_kbd_backlight_mode.attr)
1397                 exists = (drv->kbd_illum_supported) ? true : false;
1398         else if (attr == &dev_attr_kbd_backlight_timeout.attr)
1399                 exists = (drv->kbd_mode == SCI_KBD_MODE_AUTO) ? true : false;
1400         else if (attr == &dev_attr_touchpad.attr)
1401                 exists = (drv->touchpad_supported) ? true : false;
1402         else if (attr == &dev_attr_position.attr)
1403                 exists = (drv->accelerometer_supported) ? true : false;
1404
1405         return exists ? attr->mode : 0;
1406 }
1407
1408 static struct attribute_group toshiba_attr_group = {
1409         .is_visible = toshiba_sysfs_is_visible,
1410         .attrs = toshiba_attributes,
1411 };
1412
1413 static bool toshiba_acpi_i8042_filter(unsigned char data, unsigned char str,
1414                                       struct serio *port)
1415 {
1416         if (str & 0x20)
1417                 return false;
1418
1419         if (unlikely(data == 0xe0))
1420                 return false;
1421
1422         if ((data & 0x7f) == TOS1900_FN_SCAN) {
1423                 schedule_work(&toshiba_acpi->hotkey_work);
1424                 return true;
1425         }
1426
1427         return false;
1428 }
1429
1430 static void toshiba_acpi_hotkey_work(struct work_struct *work)
1431 {
1432         acpi_handle ec_handle = ec_get_handle();
1433         acpi_status status;
1434
1435         if (!ec_handle)
1436                 return;
1437
1438         status = acpi_evaluate_object(ec_handle, "NTFY", NULL, NULL);
1439         if (ACPI_FAILURE(status))
1440                 pr_err("ACPI NTFY method execution failed\n");
1441 }
1442
1443 /*
1444  * Returns hotkey scancode, or < 0 on failure.
1445  */
1446 static int toshiba_acpi_query_hotkey(struct toshiba_acpi_dev *dev)
1447 {
1448         unsigned long long value;
1449         acpi_status status;
1450
1451         status = acpi_evaluate_integer(dev->acpi_dev->handle, "INFO",
1452                                       NULL, &value);
1453         if (ACPI_FAILURE(status)) {
1454                 pr_err("ACPI INFO method execution failed\n");
1455                 return -EIO;
1456         }
1457
1458         return value;
1459 }
1460
1461 static void toshiba_acpi_report_hotkey(struct toshiba_acpi_dev *dev,
1462                                        int scancode)
1463 {
1464         if (scancode == 0x100)
1465                 return;
1466
1467         /* act on key press; ignore key release */
1468         if (scancode & 0x80)
1469                 return;
1470
1471         if (!sparse_keymap_report_event(dev->hotkey_dev, scancode, 1, true))
1472                 pr_info("Unknown key %x\n", scancode);
1473 }
1474
1475 static int toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
1476 {
1477         acpi_status status;
1478         acpi_handle ec_handle;
1479         int error;
1480         u32 hci_result;
1481         const struct key_entry *keymap = toshiba_acpi_keymap;
1482
1483         dev->hotkey_dev = input_allocate_device();
1484         if (!dev->hotkey_dev)
1485                 return -ENOMEM;
1486
1487         dev->hotkey_dev->name = "Toshiba input device";
1488         dev->hotkey_dev->phys = "toshiba_acpi/input0";
1489         dev->hotkey_dev->id.bustype = BUS_HOST;
1490
1491         if (dmi_check_system(toshiba_alt_keymap_dmi))
1492                 keymap = toshiba_acpi_alt_keymap;
1493         error = sparse_keymap_setup(dev->hotkey_dev, keymap, NULL);
1494         if (error)
1495                 goto err_free_dev;
1496
1497         /*
1498          * For some machines the SCI responsible for providing hotkey
1499          * notification doesn't fire. We can trigger the notification
1500          * whenever the Fn key is pressed using the NTFY method, if
1501          * supported, so if it's present set up an i8042 key filter
1502          * for this purpose.
1503          */
1504         status = AE_ERROR;
1505         ec_handle = ec_get_handle();
1506         if (ec_handle && acpi_has_method(ec_handle, "NTFY")) {
1507                 INIT_WORK(&dev->hotkey_work, toshiba_acpi_hotkey_work);
1508
1509                 error = i8042_install_filter(toshiba_acpi_i8042_filter);
1510                 if (error) {
1511                         pr_err("Error installing key filter\n");
1512                         goto err_free_keymap;
1513                 }
1514
1515                 dev->ntfy_supported = 1;
1516         }
1517
1518         /*
1519          * Determine hotkey query interface. Prefer using the INFO
1520          * method when it is available.
1521          */
1522         if (acpi_has_method(dev->acpi_dev->handle, "INFO"))
1523                 dev->info_supported = 1;
1524         else {
1525                 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
1526                 if (hci_result == HCI_SUCCESS)
1527                         dev->system_event_supported = 1;
1528         }
1529
1530         if (!dev->info_supported && !dev->system_event_supported) {
1531                 pr_warn("No hotkey query interface found\n");
1532                 goto err_remove_filter;
1533         }
1534
1535         status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL);
1536         if (ACPI_FAILURE(status)) {
1537                 pr_info("Unable to enable hotkeys\n");
1538                 error = -ENODEV;
1539                 goto err_remove_filter;
1540         }
1541
1542         error = input_register_device(dev->hotkey_dev);
1543         if (error) {
1544                 pr_info("Unable to register input device\n");
1545                 goto err_remove_filter;
1546         }
1547
1548         hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &hci_result);
1549         return 0;
1550
1551  err_remove_filter:
1552         if (dev->ntfy_supported)
1553                 i8042_remove_filter(toshiba_acpi_i8042_filter);
1554  err_free_keymap:
1555         sparse_keymap_free(dev->hotkey_dev);
1556  err_free_dev:
1557         input_free_device(dev->hotkey_dev);
1558         dev->hotkey_dev = NULL;
1559         return error;
1560 }
1561
1562 static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev)
1563 {
1564         struct backlight_properties props;
1565         int brightness;
1566         int ret;
1567         bool enabled;
1568
1569         /*
1570          * Some machines don't support the backlight methods at all, and
1571          * others support it read-only. Either of these is pretty useless,
1572          * so only register the backlight device if the backlight method
1573          * supports both reads and writes.
1574          */
1575         brightness = __get_lcd_brightness(dev);
1576         if (brightness < 0)
1577                 return 0;
1578         ret = set_lcd_brightness(dev, brightness);
1579         if (ret) {
1580                 pr_debug("Backlight method is read-only, disabling backlight support\n");
1581                 return 0;
1582         }
1583
1584         /* Determine whether or not BIOS supports transflective backlight */
1585         ret = get_tr_backlight_status(dev, &enabled);
1586         dev->tr_backlight_supported = !ret;
1587
1588         memset(&props, 0, sizeof(props));
1589         props.type = BACKLIGHT_PLATFORM;
1590         props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
1591
1592         /* adding an extra level and having 0 change to transflective mode */
1593         if (dev->tr_backlight_supported)
1594                 props.max_brightness++;
1595
1596         dev->backlight_dev = backlight_device_register("toshiba",
1597                                                        &dev->acpi_dev->dev,
1598                                                        dev,
1599                                                        &toshiba_backlight_data,
1600                                                        &props);
1601         if (IS_ERR(dev->backlight_dev)) {
1602                 ret = PTR_ERR(dev->backlight_dev);
1603                 pr_err("Could not register toshiba backlight device\n");
1604                 dev->backlight_dev = NULL;
1605                 return ret;
1606         }
1607
1608         dev->backlight_dev->props.brightness = brightness;
1609         return 0;
1610 }
1611
1612 static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
1613 {
1614         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1615
1616         remove_toshiba_proc_entries(dev);
1617
1618         if (dev->sysfs_created)
1619                 sysfs_remove_group(&dev->acpi_dev->dev.kobj,
1620                                    &toshiba_attr_group);
1621
1622         if (dev->ntfy_supported) {
1623                 i8042_remove_filter(toshiba_acpi_i8042_filter);
1624                 cancel_work_sync(&dev->hotkey_work);
1625         }
1626
1627         if (dev->hotkey_dev) {
1628                 input_unregister_device(dev->hotkey_dev);
1629                 sparse_keymap_free(dev->hotkey_dev);
1630         }
1631
1632         if (dev->bt_rfk) {
1633                 rfkill_unregister(dev->bt_rfk);
1634                 rfkill_destroy(dev->bt_rfk);
1635         }
1636
1637         if (dev->backlight_dev)
1638                 backlight_device_unregister(dev->backlight_dev);
1639
1640         if (dev->illumination_supported)
1641                 led_classdev_unregister(&dev->led_dev);
1642
1643         if (dev->kbd_led_registered)
1644                 led_classdev_unregister(&dev->kbd_led);
1645
1646         if (dev->eco_supported)
1647                 led_classdev_unregister(&dev->eco_led);
1648
1649         if (toshiba_acpi)
1650                 toshiba_acpi = NULL;
1651
1652         kfree(dev);
1653
1654         return 0;
1655 }
1656
1657 static const char *find_hci_method(acpi_handle handle)
1658 {
1659         if (acpi_has_method(handle, "GHCI"))
1660                 return "GHCI";
1661
1662         if (acpi_has_method(handle, "SPFC"))
1663                 return "SPFC";
1664
1665         return NULL;
1666 }
1667
1668 static int toshiba_acpi_add(struct acpi_device *acpi_dev)
1669 {
1670         struct toshiba_acpi_dev *dev;
1671         const char *hci_method;
1672         u32 dummy;
1673         bool bt_present;
1674         int ret = 0;
1675
1676         if (toshiba_acpi)
1677                 return -EBUSY;
1678
1679         pr_info("Toshiba Laptop ACPI Extras version %s\n",
1680                TOSHIBA_ACPI_VERSION);
1681
1682         hci_method = find_hci_method(acpi_dev->handle);
1683         if (!hci_method) {
1684                 pr_err("HCI interface not found\n");
1685                 return -ENODEV;
1686         }
1687
1688         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1689         if (!dev)
1690                 return -ENOMEM;
1691         dev->acpi_dev = acpi_dev;
1692         dev->method_hci = hci_method;
1693         acpi_dev->driver_data = dev;
1694         dev_set_drvdata(&acpi_dev->dev, dev);
1695
1696         if (toshiba_acpi_setup_keyboard(dev))
1697                 pr_info("Unable to activate hotkeys\n");
1698
1699         mutex_init(&dev->mutex);
1700
1701         ret = toshiba_acpi_setup_backlight(dev);
1702         if (ret)
1703                 goto error;
1704
1705         /* Register rfkill switch for Bluetooth */
1706         if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) {
1707                 dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth",
1708                                            &acpi_dev->dev,
1709                                            RFKILL_TYPE_BLUETOOTH,
1710                                            &toshiba_rfk_ops,
1711                                            dev);
1712                 if (!dev->bt_rfk) {
1713                         pr_err("unable to allocate rfkill device\n");
1714                         ret = -ENOMEM;
1715                         goto error;
1716                 }
1717
1718                 ret = rfkill_register(dev->bt_rfk);
1719                 if (ret) {
1720                         pr_err("unable to register rfkill device\n");
1721                         rfkill_destroy(dev->bt_rfk);
1722                         goto error;
1723                 }
1724         }
1725
1726         if (toshiba_illumination_available(dev)) {
1727                 dev->led_dev.name = "toshiba::illumination";
1728                 dev->led_dev.max_brightness = 1;
1729                 dev->led_dev.brightness_set = toshiba_illumination_set;
1730                 dev->led_dev.brightness_get = toshiba_illumination_get;
1731                 if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
1732                         dev->illumination_supported = 1;
1733         }
1734
1735         if (toshiba_eco_mode_available(dev)) {
1736                 dev->eco_led.name = "toshiba::eco_mode";
1737                 dev->eco_led.max_brightness = 1;
1738                 dev->eco_led.brightness_set = toshiba_eco_mode_set_status;
1739                 dev->eco_led.brightness_get = toshiba_eco_mode_get_status;
1740                 if (!led_classdev_register(&dev->acpi_dev->dev, &dev->eco_led))
1741                         dev->eco_supported = 1;
1742         }
1743
1744         ret = toshiba_kbd_illum_status_get(dev, &dummy);
1745         if (!ret) {
1746                 dev->kbd_time = dummy >> HCI_MISC_SHIFT;
1747                 dev->kbd_mode = dummy & 0x07;
1748         }
1749         dev->kbd_illum_supported = !ret;
1750         /*
1751          * Only register the LED if KBD illumination is supported
1752          * and the keyboard backlight operation mode is set to FN-Z
1753          */
1754         if (dev->kbd_illum_supported && dev->kbd_mode == SCI_KBD_MODE_FNZ) {
1755                 dev->kbd_led.name = "toshiba::kbd_backlight";
1756                 dev->kbd_led.max_brightness = 1;
1757                 dev->kbd_led.brightness_set = toshiba_kbd_backlight_set;
1758                 dev->kbd_led.brightness_get = toshiba_kbd_backlight_get;
1759                 if (!led_classdev_register(&dev->acpi_dev->dev, &dev->kbd_led))
1760                         dev->kbd_led_registered = 1;
1761         }
1762
1763         ret = toshiba_touchpad_get(dev, &dummy);
1764         dev->touchpad_supported = !ret;
1765
1766         ret = toshiba_accelerometer_supported(dev);
1767         dev->accelerometer_supported = !ret;
1768
1769         /* Determine whether or not BIOS supports fan and video interfaces */
1770
1771         ret = get_video_status(dev, &dummy);
1772         dev->video_supported = !ret;
1773
1774         ret = get_fan_status(dev, &dummy);
1775         dev->fan_supported = !ret;
1776
1777         ret = sysfs_create_group(&dev->acpi_dev->dev.kobj,
1778                                  &toshiba_attr_group);
1779         if (ret) {
1780                 dev->sysfs_created = 0;
1781                 goto error;
1782         }
1783         dev->sysfs_created = !ret;
1784
1785         create_toshiba_proc_entries(dev);
1786
1787         toshiba_acpi = dev;
1788
1789         return 0;
1790
1791 error:
1792         toshiba_acpi_remove(acpi_dev);
1793         return ret;
1794 }
1795
1796 static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event)
1797 {
1798         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1799         u32 hci_result, value;
1800         int retries = 3;
1801         int scancode;
1802
1803         if (event != 0x80)
1804                 return;
1805
1806         if (dev->info_supported) {
1807                 scancode = toshiba_acpi_query_hotkey(dev);
1808                 if (scancode < 0)
1809                         pr_err("Failed to query hotkey event\n");
1810                 else if (scancode != 0)
1811                         toshiba_acpi_report_hotkey(dev, scancode);
1812         } else if (dev->system_event_supported) {
1813                 do {
1814                         hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
1815                         switch (hci_result) {
1816                         case HCI_SUCCESS:
1817                                 toshiba_acpi_report_hotkey(dev, (int)value);
1818                                 break;
1819                         case HCI_NOT_SUPPORTED:
1820                                 /*
1821                                  * This is a workaround for an unresolved
1822                                  * issue on some machines where system events
1823                                  * sporadically become disabled.
1824                                  */
1825                                 hci_write1(dev, HCI_SYSTEM_EVENT, 1,
1826                                            &hci_result);
1827                                 pr_notice("Re-enabled hotkeys\n");
1828                                 /* fall through */
1829                         default:
1830                                 retries--;
1831                                 break;
1832                         }
1833                 } while (retries && hci_result != HCI_EMPTY);
1834         }
1835 }
1836
1837 #ifdef CONFIG_PM_SLEEP
1838 static int toshiba_acpi_suspend(struct device *device)
1839 {
1840         struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
1841         u32 result;
1842
1843         if (dev->hotkey_dev)
1844                 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_DISABLE, &result);
1845
1846         return 0;
1847 }
1848
1849 static int toshiba_acpi_resume(struct device *device)
1850 {
1851         struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
1852         u32 result;
1853
1854         if (dev->hotkey_dev)
1855                 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &result);
1856
1857         return 0;
1858 }
1859 #endif
1860
1861 static SIMPLE_DEV_PM_OPS(toshiba_acpi_pm,
1862                          toshiba_acpi_suspend, toshiba_acpi_resume);
1863
1864 static struct acpi_driver toshiba_acpi_driver = {
1865         .name   = "Toshiba ACPI driver",
1866         .owner  = THIS_MODULE,
1867         .ids    = toshiba_device_ids,
1868         .flags  = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1869         .ops    = {
1870                 .add            = toshiba_acpi_add,
1871                 .remove         = toshiba_acpi_remove,
1872                 .notify         = toshiba_acpi_notify,
1873         },
1874         .drv.pm = &toshiba_acpi_pm,
1875 };
1876
1877 static int __init toshiba_acpi_init(void)
1878 {
1879         int ret;
1880
1881         /*
1882          * Machines with this WMI guid aren't supported due to bugs in
1883          * their AML. This check relies on wmi initializing before
1884          * toshiba_acpi to guarantee guids have been identified.
1885          */
1886         if (wmi_has_guid(TOSHIBA_WMI_EVENT_GUID))
1887                 return -ENODEV;
1888
1889         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
1890         if (!toshiba_proc_dir) {
1891                 pr_err("Unable to create proc dir " PROC_TOSHIBA "\n");
1892                 return -ENODEV;
1893         }
1894
1895         ret = acpi_bus_register_driver(&toshiba_acpi_driver);
1896         if (ret) {
1897                 pr_err("Failed to register ACPI driver: %d\n", ret);
1898                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1899         }
1900
1901         return ret;
1902 }
1903
1904 static void __exit toshiba_acpi_exit(void)
1905 {
1906         acpi_bus_unregister_driver(&toshiba_acpi_driver);
1907         if (toshiba_proc_dir)
1908                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1909 }
1910
1911 module_init(toshiba_acpi_init);
1912 module_exit(toshiba_acpi_exit);