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                 .matches = {
 227                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 228                         DMI_MATCH(DMI_PRODUCT_NAME, "Qosmio X75-A"),
 229                 },
 230         },
 231         {}
 232 };
 233
 234 static const struct key_entry toshiba_acpi_alt_keymap[] = {
 235         { KE_KEY, 0x157, { KEY_MUTE } },
 236         { KE_KEY, 0x102, { KEY_ZOOMOUT } },
 237         { KE_KEY, 0x103, { KEY_ZOOMIN } },
 238         { KE_KEY, 0x12c, { KEY_KBDILLUMTOGGLE } },
 239         { KE_KEY, 0x139, { KEY_ZOOMRESET } },
 240         { KE_KEY, 0x13e, { KEY_SWITCHVIDEOMODE } },
 241         { KE_KEY, 0x13c, { KEY_BRIGHTNESSDOWN } },
 242         { KE_KEY, 0x13d, { KEY_BRIGHTNESSUP } },
 243         { KE_KEY, 0x158, { KEY_WLAN } },
 244         { KE_KEY, 0x13f, { KEY_TOUCHPAD_TOGGLE } },
 245         { KE_END, 0 },
 246 };
 247
 248 /* utility
 249  */
 250
 251 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
 252 {
 253         *word = (*word & ~mask) | (mask * value);
 254 }
 255
 256 /* acpi interface wrappers
 257  */
 258
 259 static int write_acpi_int(const char *methodName, int val)
 260 {
 261         acpi_status status;
 262
 263         status = acpi_execute_simple_method(NULL, (char *)methodName, val);
 264         return (status == AE_OK) ? 0 : -EIO;
 265 }
 266
 267 /* Perform a raw HCI call.  Here we don't care about input or output buffer
 268  * format.
 269  */
 270 static acpi_status hci_raw(struct toshiba_acpi_dev *dev,
 271                            const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
 272 {
 273         struct acpi_object_list params;
 274         union acpi_object in_objs[HCI_WORDS];
 275         struct acpi_buffer results;
 276         union acpi_object out_objs[HCI_WORDS + 1];
 277         acpi_status status;
 278         int i;
 279
 280         params.count = HCI_WORDS;
 281         params.pointer = in_objs;
 282         for (i = 0; i < HCI_WORDS; ++i) {
 283                 in_objs[i].type = ACPI_TYPE_INTEGER;
 284                 in_objs[i].integer.value = in[i];
 285         }
 286
 287         results.length = sizeof(out_objs);
 288         results.pointer = out_objs;
 289
 290         status = acpi_evaluate_object(dev->acpi_dev->handle,
 291                                       (char *)dev->method_hci, &params,
 292                                       &results);
 293         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
 294                 for (i = 0; i < out_objs->package.count; ++i) {
 295                         out[i] = out_objs->package.elements[i].integer.value;
 296                 }
 297         }
 298
 299         return status;
 300 }
 301
 302 /* common hci tasks (get or set one or two value)
 303  *
 304  * In addition to the ACPI status, the HCI system returns a result which
 305  * may be useful (such as "not supported").
 306  */
 307
 308 static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg,
 309                               u32 in1, u32 *result)
 310 {
 311         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
 312         u32 out[HCI_WORDS];
 313         acpi_status status = hci_raw(dev, in, out);
 314         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 315         return status;
 316 }
 317
 318 static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg,
 319                              u32 *out1, u32 *result)
 320 {
 321         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
 322         u32 out[HCI_WORDS];
 323         acpi_status status = hci_raw(dev, in, out);
 324         *out1 = out[2];
 325         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 326         return status;
 327 }
 328
 329 static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg,
 330                               u32 in1, u32 in2, u32 *result)
 331 {
 332         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
 333         u32 out[HCI_WORDS];
 334         acpi_status status = hci_raw(dev, in, out);
 335         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 336         return status;
 337 }
 338
 339 static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg,
 340                              u32 *out1, u32 *out2, u32 *result)
 341 {
 342         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
 343         u32 out[HCI_WORDS];
 344         acpi_status status = hci_raw(dev, in, out);
 345         *out1 = out[2];
 346         *out2 = out[3];
 347         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 348         return status;
 349 }
 350
 351 /* common sci tasks
 352  */
 353
 354 static int sci_open(struct toshiba_acpi_dev *dev)
 355 {
 356         u32 in[HCI_WORDS] = { SCI_OPEN, 0, 0, 0, 0, 0 };
 357         u32 out[HCI_WORDS];
 358         acpi_status status;
 359
 360         status = hci_raw(dev, in, out);
 361         if  (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
 362                 pr_err("ACPI call to open SCI failed\n");
 363                 return 0;
 364         }
 365
 366         if (out[0] == SCI_OPEN_CLOSE_OK) {
 367                 return 1;
 368         } else if (out[0] == SCI_ALREADY_OPEN) {
 369                 pr_info("Toshiba SCI already opened\n");
 370                 return 1;
 371         } else if (out[0] == SCI_NOT_PRESENT) {
 372                 pr_info("Toshiba SCI is not present\n");
 373         }
 374
 375         return 0;
 376 }
 377
 378 static void sci_close(struct toshiba_acpi_dev *dev)
 379 {
 380         u32 in[HCI_WORDS] = { SCI_CLOSE, 0, 0, 0, 0, 0 };
 381         u32 out[HCI_WORDS];
 382         acpi_status status;
 383
 384         status = hci_raw(dev, in, out);
 385         if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
 386                 pr_err("ACPI call to close SCI failed\n");
 387                 return;
 388         }
 389
 390         if (out[0] == SCI_OPEN_CLOSE_OK)
 391                 return;
 392         else if (out[0] == SCI_NOT_OPENED)
 393                 pr_info("Toshiba SCI not opened\n");
 394         else if (out[0] == SCI_NOT_PRESENT)
 395                 pr_info("Toshiba SCI is not present\n");
 396 }
 397
 398 static acpi_status sci_read(struct toshiba_acpi_dev *dev, u32 reg,
 399                             u32 *out1, u32 *result)
 400 {
 401         u32 in[HCI_WORDS] = { SCI_GET, reg, 0, 0, 0, 0 };
 402         u32 out[HCI_WORDS];
 403         acpi_status status = hci_raw(dev, in, out);
 404         *out1 = out[2];
 405         *result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE;
 406         return status;
 407 }
 408
 409 static acpi_status sci_write(struct toshiba_acpi_dev *dev, u32 reg,
 410                              u32 in1, u32 *result)
 411 {
 412         u32 in[HCI_WORDS] = { SCI_SET, reg, in1, 0, 0, 0 };
 413         u32 out[HCI_WORDS];
 414         acpi_status status = hci_raw(dev, in, out);
 415         *result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE;
 416         return status;
 417 }
 418
 419 /* Illumination support */
 420 static int toshiba_illumination_available(struct toshiba_acpi_dev *dev)
 421 {
 422         u32 in[HCI_WORDS] = { SCI_GET, SCI_ILLUMINATION, 0, 0, 0, 0 };
 423         u32 out[HCI_WORDS];
 424         acpi_status status;
 425
 426         if (!sci_open(dev))
 427                 return 0;
 428
 429         status = hci_raw(dev, in, out);
 430         sci_close(dev);
 431         if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
 432                 pr_err("ACPI call to query Illumination support failed\n");
 433                 return 0;
 434         } else if (out[0] == HCI_NOT_SUPPORTED || out[1] != 1) {
 435                 pr_info("Illumination device not available\n");
 436                 return 0;
 437         }
 438
 439         return 1;
 440 }
 441
 442 static void toshiba_illumination_set(struct led_classdev *cdev,
 443                                      enum led_brightness brightness)
 444 {
 445         struct toshiba_acpi_dev *dev = container_of(cdev,
 446                         struct toshiba_acpi_dev, led_dev);
 447         u32 state, result;
 448         acpi_status status;
 449
 450         /* First request : initialize communication. */
 451         if (!sci_open(dev))
 452                 return;
 453
 454         /* Switch the illumination on/off */
 455         state = brightness ? 1 : 0;
 456         status = sci_write(dev, SCI_ILLUMINATION, state, &result);
 457         sci_close(dev);
 458         if (ACPI_FAILURE(status)) {
 459                 pr_err("ACPI call for illumination failed\n");
 460                 return;
 461         } else if (result == HCI_NOT_SUPPORTED) {
 462                 pr_info("Illumination not supported\n");
 463                 return;
 464         }
 465 }
 466
 467 static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
 468 {
 469         struct toshiba_acpi_dev *dev = container_of(cdev,
 470                         struct toshiba_acpi_dev, led_dev);
 471         u32 state, result;
 472         acpi_status status;
 473
 474         /* First request : initialize communication. */
 475         if (!sci_open(dev))
 476                 return LED_OFF;
 477
 478         /* Check the illumination */
 479         status = sci_read(dev, SCI_ILLUMINATION, &state, &result);
 480         sci_close(dev);
 481         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
 482                 pr_err("ACPI call for illumination failed\n");
 483                 return LED_OFF;
 484         } else if (result == HCI_NOT_SUPPORTED) {
 485                 pr_info("Illumination not supported\n");
 486                 return LED_OFF;
 487         }
 488
 489         return state ? LED_FULL : LED_OFF;
 490 }
 491
 492 /* KBD Illumination */
 493 static int toshiba_kbd_illum_status_set(struct toshiba_acpi_dev *dev, u32 time)
 494 {
 495         u32 result;
 496         acpi_status status;
 497
 498         if (!sci_open(dev))
 499                 return -EIO;
 500
 501         status = sci_write(dev, SCI_KBD_ILLUM_STATUS, time, &result);
 502         sci_close(dev);
 503         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
 504                 pr_err("ACPI call to set KBD backlight status failed\n");
 505                 return -EIO;
 506         } else if (result == HCI_NOT_SUPPORTED) {
 507                 pr_info("Keyboard backlight status not supported\n");
 508                 return -ENODEV;
 509         }
 510
 511         return 0;
 512 }
 513
 514 static int toshiba_kbd_illum_status_get(struct toshiba_acpi_dev *dev, u32 *time)
 515 {
 516         u32 result;
 517         acpi_status status;
 518
 519         if (!sci_open(dev))
 520                 return -EIO;
 521
 522         status = sci_read(dev, SCI_KBD_ILLUM_STATUS, time, &result);
 523         sci_close(dev);
 524         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
 525                 pr_err("ACPI call to get KBD backlight status failed\n");
 526                 return -EIO;
 527         } else if (result == HCI_NOT_SUPPORTED) {
 528                 pr_info("Keyboard backlight status not supported\n");
 529                 return -ENODEV;
 530         }
 531
 532         return 0;
 533 }
 534
 535 static enum led_brightness toshiba_kbd_backlight_get(struct led_classdev *cdev)
 536 {
 537         struct toshiba_acpi_dev *dev = container_of(cdev,
 538                         struct toshiba_acpi_dev, kbd_led);
 539         u32 state, result;
 540         acpi_status status;
 541
 542         /* Check the keyboard backlight state */
 543         status = hci_read1(dev, HCI_KBD_ILLUMINATION, &state, &result);
 544         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
 545                 pr_err("ACPI call to get the keyboard backlight failed\n");
 546                 return LED_OFF;
 547         } else if (result == HCI_NOT_SUPPORTED) {
 548                 pr_info("Keyboard backlight not supported\n");
 549                 return LED_OFF;
 550         }
 551
 552         return state ? LED_FULL : LED_OFF;
 553 }
 554
 555 static void toshiba_kbd_backlight_set(struct led_classdev *cdev,
 556                                      enum led_brightness brightness)
 557 {
 558         struct toshiba_acpi_dev *dev = container_of(cdev,
 559                         struct toshiba_acpi_dev, kbd_led);
 560         u32 state, result;
 561         acpi_status status;
 562
 563         /* Set the keyboard backlight state */
 564         state = brightness ? 1 : 0;
 565         status = hci_write1(dev, HCI_KBD_ILLUMINATION, state, &result);
 566         if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
 567                 pr_err("ACPI call to set KBD Illumination mode failed\n");
 568                 return;
 569         } else if (result == HCI_NOT_SUPPORTED) {
 570                 pr_info("Keyboard backlight not supported\n");
 571                 return;
 572         }
 573 }
 574
 575 /* TouchPad support */
 576 static int toshiba_touchpad_set(struct toshiba_acpi_dev *dev, u32 state)
 577 {
 578         u32 result;
 579         acpi_status status;
 580
 581         if (!sci_open(dev))
 582                 return -EIO;
 583
 584         status = sci_write(dev, SCI_TOUCHPAD, state, &result);
 585         sci_close(dev);
 586         if (ACPI_FAILURE(status)) {
 587                 pr_err("ACPI call to set the touchpad failed\n");
 588                 return -EIO;
 589         } else if (result == HCI_NOT_SUPPORTED) {
 590                 return -ENODEV;
 591         }
 592
 593         return 0;
 594 }
 595
 596 static int toshiba_touchpad_get(struct toshiba_acpi_dev *dev, u32 *state)
 597 {
 598         u32 result;
 599         acpi_status status;
 600
 601         if (!sci_open(dev))
 602                 return -EIO;
 603
 604         status = sci_read(dev, SCI_TOUCHPAD, state, &result);
 605         sci_close(dev);
 606         if (ACPI_FAILURE(status)) {
 607                 pr_err("ACPI call to query the touchpad failed\n");
 608                 return -EIO;
 609         } else if (result == HCI_NOT_SUPPORTED) {
 610                 return -ENODEV;
 611         }
 612
 613         return 0;
 614 }
 615
 616 /* Eco Mode support */
 617 static int toshiba_eco_mode_available(struct toshiba_acpi_dev *dev)
 618 {
 619         acpi_status status;
 620         u32 in[HCI_WORDS] = { HCI_GET, HCI_ECO_MODE, 0, 1, 0, 0 };
 621         u32 out[HCI_WORDS];
 622
 623         status = hci_raw(dev, in, out);
 624         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
 625                 pr_info("ACPI call to get ECO led failed\n");
 626                 return 0;
 627         }
 628
 629         return 1;
 630 }
 631
 632 static enum led_brightness toshiba_eco_mode_get_status(struct led_classdev *cdev)
 633 {
 634         struct toshiba_acpi_dev *dev = container_of(cdev,
 635                         struct toshiba_acpi_dev, eco_led);
 636         u32 in[HCI_WORDS] = { HCI_GET, HCI_ECO_MODE, 0, 1, 0, 0 };
 637         u32 out[HCI_WORDS];
 638         acpi_status status;
 639
 640         status = hci_raw(dev, in, out);
 641         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
 642                 pr_err("ACPI call to get ECO led failed\n");
 643                 return LED_OFF;
 644         }
 645
 646         return out[2] ? LED_FULL : LED_OFF;
 647 }
 648
 649 static void toshiba_eco_mode_set_status(struct led_classdev *cdev,
 650                                      enum led_brightness brightness)
 651 {
 652         struct toshiba_acpi_dev *dev = container_of(cdev,
 653                         struct toshiba_acpi_dev, eco_led);
 654         u32 in[HCI_WORDS] = { HCI_SET, HCI_ECO_MODE, 0, 1, 0, 0 };
 655         u32 out[HCI_WORDS];
 656         acpi_status status;
 657
 658         /* Switch the Eco Mode led on/off */
 659         in[2] = (brightness) ? 1 : 0;
 660         status = hci_raw(dev, in, out);
 661         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
 662                 pr_err("ACPI call to set ECO led failed\n");
 663                 return;
 664         }
 665 }
 666
 667 /* Accelerometer support */
 668 static int toshiba_accelerometer_supported(struct toshiba_acpi_dev *dev)
 669 {
 670         u32 in[HCI_WORDS] = { HCI_GET, HCI_ACCELEROMETER2, 0, 0, 0, 0 };
 671         u32 out[HCI_WORDS];
 672         acpi_status status;
 673
 674         /* Check if the accelerometer call exists,
 675          * this call also serves as initialization
 676          */
 677         status = hci_raw(dev, in, out);
 678         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
 679                 pr_err("ACPI call to query the accelerometer failed\n");
 680                 return -EIO;
 681         } else if (out[0] == HCI_DATA_NOT_AVAILABLE ||
 682                    out[0] == HCI_NOT_INITIALIZED) {
 683                 pr_err("Accelerometer not initialized\n");
 684                 return -EIO;
 685         } else if (out[0] == HCI_NOT_SUPPORTED) {
 686                 pr_info("Accelerometer not supported\n");
 687                 return -ENODEV;
 688         }
 689
 690         return 0;
 691 }
 692
 693 static int toshiba_accelerometer_get(struct toshiba_acpi_dev *dev,
 694                                       u32 *xy, u32 *z)
 695 {
 696         u32 in[HCI_WORDS] = { HCI_GET, HCI_ACCELEROMETER, 0, 1, 0, 0 };
 697         u32 out[HCI_WORDS];
 698         acpi_status status;
 699
 700         /* Check the Accelerometer status */
 701         status = hci_raw(dev, in, out);
 702         if (ACPI_FAILURE(status) || out[0] == SCI_INPUT_DATA_ERROR) {
 703                 pr_err("ACPI call to query the accelerometer failed\n");
 704                 return -EIO;
 705         }
 706
 707         *xy = out[2];
 708         *z = out[4];
 709
 710         return 0;
 711 }
 712
 713 /* Bluetooth rfkill handlers */
 714
 715 static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)
 716 {
 717         u32 hci_result;
 718         u32 value, value2;
 719
 720         value = 0;
 721         value2 = 0;
 722         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
 723         if (hci_result == HCI_SUCCESS)
 724                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
 725
 726         return hci_result;
 727 }
 728
 729 static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state)
 730 {
 731         u32 hci_result;
 732         u32 value, value2;
 733
 734         value = 0;
 735         value2 = 0x0001;
 736         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
 737
 738         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
 739         return hci_result;
 740 }
 741
 742 static int bt_rfkill_set_block(void *data, bool blocked)
 743 {
 744         struct toshiba_acpi_dev *dev = data;
 745         u32 result1, result2;
 746         u32 value;
 747         int err;
 748         bool radio_state;
 749
 750         value = (blocked == false);
 751
 752         mutex_lock(&dev->mutex);
 753         if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) {
 754                 err = -EIO;
 755                 goto out;
 756         }
 757
 758         if (!radio_state) {
 759                 err = 0;
 760                 goto out;
 761         }
 762
 763         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
 764         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
 765
 766         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
 767                 err = -EIO;
 768         else
 769                 err = 0;
 770  out:
 771         mutex_unlock(&dev->mutex);
 772         return err;
 773 }
 774
 775 static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
 776 {
 777         bool new_rfk_state;
 778         bool value;
 779         u32 hci_result;
 780         struct toshiba_acpi_dev *dev = data;
 781
 782         mutex_lock(&dev->mutex);
 783
 784         hci_result = hci_get_radio_state(dev, &value);
 785         if (hci_result != HCI_SUCCESS) {
 786                 /* Can't do anything useful */
 787                 mutex_unlock(&dev->mutex);
 788                 return;
 789         }
 790
 791         new_rfk_state = value;
 792
 793         mutex_unlock(&dev->mutex);
 794
 795         if (rfkill_set_hw_state(rfkill, !new_rfk_state))
 796                 bt_rfkill_set_block(data, true);
 797 }
 798
 799 static const struct rfkill_ops toshiba_rfk_ops = {
 800         .set_block = bt_rfkill_set_block,
 801         .poll = bt_rfkill_poll,
 802 };
 803
 804 static int get_tr_backlight_status(struct toshiba_acpi_dev *dev, bool *enabled)
 805 {
 806         u32 hci_result;
 807         u32 status;
 808
 809         hci_read1(dev, HCI_TR_BACKLIGHT, &status, &hci_result);
 810         *enabled = !status;
 811         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 812 }
 813
 814 static int set_tr_backlight_status(struct toshiba_acpi_dev *dev, bool enable)
 815 {
 816         u32 hci_result;
 817         u32 value = !enable;
 818
 819         hci_write1(dev, HCI_TR_BACKLIGHT, value, &hci_result);
 820         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 821 }
 822
 823 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
 824
 825 static int __get_lcd_brightness(struct toshiba_acpi_dev *dev)
 826 {
 827         u32 hci_result;
 828         u32 value;
 829         int brightness = 0;
 830
 831         if (dev->tr_backlight_supported) {
 832                 bool enabled;
 833                 int ret = get_tr_backlight_status(dev, &enabled);
 834                 if (ret)
 835                         return ret;
 836                 if (enabled)
 837                         return 0;
 838                 brightness++;
 839         }
 840
 841         hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result);
 842         if (hci_result == HCI_SUCCESS)
 843                 return brightness + (value >> HCI_LCD_BRIGHTNESS_SHIFT);
 844
 845         return -EIO;
 846 }
 847
 848 static int get_lcd_brightness(struct backlight_device *bd)
 849 {
 850         struct toshiba_acpi_dev *dev = bl_get_data(bd);
 851         return __get_lcd_brightness(dev);
 852 }
 853
 854 static int lcd_proc_show(struct seq_file *m, void *v)
 855 {
 856         struct toshiba_acpi_dev *dev = m->private;
 857         int value;
 858         int levels;
 859
 860         if (!dev->backlight_dev)
 861                 return -ENODEV;
 862
 863         levels = dev->backlight_dev->props.max_brightness + 1;
 864         value = get_lcd_brightness(dev->backlight_dev);
 865         if (value >= 0) {
 866                 seq_printf(m, "brightness:              %d\n", value);
 867                 seq_printf(m, "brightness_levels:       %d\n", levels);
 868                 return 0;
 869         }
 870
 871         pr_err("Error reading LCD brightness\n");
 872         return -EIO;
 873 }
 874
 875 static int lcd_proc_open(struct inode *inode, struct file *file)
 876 {
 877         return single_open(file, lcd_proc_show, PDE_DATA(inode));
 878 }
 879
 880 static int set_lcd_brightness(struct toshiba_acpi_dev *dev, int value)
 881 {
 882         u32 in[HCI_WORDS] = { HCI_SET, HCI_LCD_BRIGHTNESS, 0, 0, 0, 0 };
 883         u32 out[HCI_WORDS];
 884         acpi_status status;
 885
 886         if (dev->tr_backlight_supported) {
 887                 bool enable = !value;
 888                 int ret = set_tr_backlight_status(dev, enable);
 889                 if (ret)
 890                         return ret;
 891                 if (value)
 892                         value--;
 893         }
 894
 895         in[2] = value << HCI_LCD_BRIGHTNESS_SHIFT;
 896         status = hci_raw(dev, in, out);
 897         if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
 898                 pr_err("ACPI call to set brightness failed");
 899                 return -EIO;
 900         }
 901         /* Extra check for "incomplete" backlight method, where the AML code
 902          * doesn't check for HCI_SET or HCI_GET and returns HCI_SUCCESS,
 903          * the actual brightness, and in some cases the max brightness.
 904          */
 905         if (out[2] > 0  || out[3] == 0xE000)
 906                 return -ENODEV;
 907
 908         return out[0] == HCI_SUCCESS ? 0 : -EIO;
 909 }
 910
 911 static int set_lcd_status(struct backlight_device *bd)
 912 {
 913         struct toshiba_acpi_dev *dev = bl_get_data(bd);
 914         return set_lcd_brightness(dev, bd->props.brightness);
 915 }
 916
 917 static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
 918                               size_t count, loff_t *pos)
 919 {
 920         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
 921         char cmd[42];
 922         size_t len;
 923         int value;
 924         int ret;
 925         int levels = dev->backlight_dev->props.max_brightness + 1;
 926
 927         len = min(count, sizeof(cmd) - 1);
 928         if (copy_from_user(cmd, buf, len))
 929                 return -EFAULT;
 930         cmd[len] = '\0';
 931
 932         if (sscanf(cmd, " brightness : %i", &value) == 1 &&
 933             value >= 0 && value < levels) {
 934                 ret = set_lcd_brightness(dev, value);
 935                 if (ret == 0)
 936                         ret = count;
 937         } else {
 938                 ret = -EINVAL;
 939         }
 940         return ret;
 941 }
 942
 943 static const struct file_operations lcd_proc_fops = {
 944         .owner          = THIS_MODULE,
 945         .open           = lcd_proc_open,
 946         .read           = seq_read,
 947         .llseek         = seq_lseek,
 948         .release        = single_release,
 949         .write          = lcd_proc_write,
 950 };
 951
 952 static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status)
 953 {
 954         u32 hci_result;
 955
 956         hci_read1(dev, HCI_VIDEO_OUT, status, &hci_result);
 957         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 958 }
 959
 960 static int video_proc_show(struct seq_file *m, void *v)
 961 {
 962         struct toshiba_acpi_dev *dev = m->private;
 963         u32 value;
 964         int ret;
 965
 966         ret = get_video_status(dev, &value);
 967         if (!ret) {
 968                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
 969                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
 970                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
 971                 seq_printf(m, "lcd_out:                 %d\n", is_lcd);
 972                 seq_printf(m, "crt_out:                 %d\n", is_crt);
 973                 seq_printf(m, "tv_out:                  %d\n", is_tv);
 974         }
 975
 976         return ret;
 977 }
 978
 979 static int video_proc_open(struct inode *inode, struct file *file)
 980 {
 981         return single_open(file, video_proc_show, PDE_DATA(inode));
 982 }
 983
 984 static ssize_t video_proc_write(struct file *file, const char __user *buf,
 985                                 size_t count, loff_t *pos)
 986 {
 987         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
 988         char *cmd, *buffer;
 989         int ret;
 990         int value;
 991         int remain = count;
 992         int lcd_out = -1;
 993         int crt_out = -1;
 994         int tv_out = -1;
 995         u32 video_out;
 996
 997         cmd = kmalloc(count + 1, GFP_KERNEL);
 998         if (!cmd)
 999                 return -ENOMEM;
1000         if (copy_from_user(cmd, buf, count)) {
1001                 kfree(cmd);
1002                 return -EFAULT;
1003         }
1004         cmd[count] = '\0';
1005
1006         buffer = cmd;
1007
1008         /* scan expression.  Multiple expressions may be delimited with ;
1009          *
1010          *  NOTE: to keep scanning simple, invalid fields are ignored
1011          */
1012         while (remain) {
1013                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
1014                         lcd_out = value & 1;
1015                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
1016                         crt_out = value & 1;
1017                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
1018                         tv_out = value & 1;
1019                 /* advance to one character past the next ; */
1020                 do {
1021                         ++buffer;
1022                         --remain;
1023                 }
1024                 while (remain && *(buffer - 1) != ';');
1025         }
1026
1027         kfree(cmd);
1028
1029         ret = get_video_status(dev, &video_out);
1030         if (!ret) {
1031                 unsigned int new_video_out = video_out;
1032                 if (lcd_out != -1)
1033                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
1034                 if (crt_out != -1)
1035                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
1036                 if (tv_out != -1)
1037                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
1038                 /* To avoid unnecessary video disruption, only write the new
1039                  * video setting if something changed. */
1040                 if (new_video_out != video_out)
1041                         ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
1042         }
1043
1044         return ret ? ret : count;
1045 }
1046
1047 static const struct file_operations video_proc_fops = {
1048         .owner          = THIS_MODULE,
1049         .open           = video_proc_open,
1050         .read           = seq_read,
1051         .llseek         = seq_lseek,
1052         .release        = single_release,
1053         .write          = video_proc_write,
1054 };
1055
1056 static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status)
1057 {
1058         u32 hci_result;
1059
1060         hci_read1(dev, HCI_FAN, status, &hci_result);
1061         return hci_result == HCI_SUCCESS ? 0 : -EIO;
1062 }
1063
1064 static int fan_proc_show(struct seq_file *m, void *v)
1065 {
1066         struct toshiba_acpi_dev *dev = m->private;
1067         int ret;
1068         u32 value;
1069
1070         ret = get_fan_status(dev, &value);
1071         if (!ret) {
1072                 seq_printf(m, "running:                 %d\n", (value > 0));
1073                 seq_printf(m, "force_on:                %d\n", dev->force_fan);
1074         }
1075
1076         return ret;
1077 }
1078
1079 static int fan_proc_open(struct inode *inode, struct file *file)
1080 {
1081         return single_open(file, fan_proc_show, PDE_DATA(inode));
1082 }
1083
1084 static ssize_t fan_proc_write(struct file *file, const char __user *buf,
1085                               size_t count, loff_t *pos)
1086 {
1087         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
1088         char cmd[42];
1089         size_t len;
1090         int value;
1091         u32 hci_result;
1092
1093         len = min(count, sizeof(cmd) - 1);
1094         if (copy_from_user(cmd, buf, len))
1095                 return -EFAULT;
1096         cmd[len] = '\0';
1097
1098         if (sscanf(cmd, " force_on : %i", &value) == 1 &&
1099             value >= 0 && value <= 1) {
1100                 hci_write1(dev, HCI_FAN, value, &hci_result);
1101                 if (hci_result != HCI_SUCCESS)
1102                         return -EIO;
1103                 else
1104                         dev->force_fan = value;
1105         } else {
1106                 return -EINVAL;
1107         }
1108
1109         return count;
1110 }
1111
1112 static const struct file_operations fan_proc_fops = {
1113         .owner          = THIS_MODULE,
1114         .open           = fan_proc_open,
1115         .read           = seq_read,
1116         .llseek         = seq_lseek,
1117         .release        = single_release,
1118         .write          = fan_proc_write,
1119 };
1120
1121 static int keys_proc_show(struct seq_file *m, void *v)
1122 {
1123         struct toshiba_acpi_dev *dev = m->private;
1124         u32 hci_result;
1125         u32 value;
1126
1127         if (!dev->key_event_valid && dev->system_event_supported) {
1128                 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
1129                 if (hci_result == HCI_SUCCESS) {
1130                         dev->key_event_valid = 1;
1131                         dev->last_key_event = value;
1132                 } else if (hci_result == HCI_EMPTY) {
1133                         /* better luck next time */
1134                 } else if (hci_result == HCI_NOT_SUPPORTED) {
1135                         /* This is a workaround for an unresolved issue on
1136                          * some machines where system events sporadically
1137                          * become disabled. */
1138                         hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
1139                         pr_notice("Re-enabled hotkeys\n");
1140                 } else {
1141                         pr_err("Error reading hotkey status\n");
1142                         return -EIO;
1143                 }
1144         }
1145
1146         seq_printf(m, "hotkey_ready:            %d\n", dev->key_event_valid);
1147         seq_printf(m, "hotkey:                  0x%04x\n", dev->last_key_event);
1148         return 0;
1149 }
1150
1151 static int keys_proc_open(struct inode *inode, struct file *file)
1152 {
1153         return single_open(file, keys_proc_show, PDE_DATA(inode));
1154 }
1155
1156 static ssize_t keys_proc_write(struct file *file, const char __user *buf,
1157                                size_t count, loff_t *pos)
1158 {
1159         struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
1160         char cmd[42];
1161         size_t len;
1162         int value;
1163
1164         len = min(count, sizeof(cmd) - 1);
1165         if (copy_from_user(cmd, buf, len))
1166                 return -EFAULT;
1167         cmd[len] = '\0';
1168
1169         if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
1170                 dev->key_event_valid = 0;
1171         } else {
1172                 return -EINVAL;
1173         }
1174
1175         return count;
1176 }
1177
1178 static const struct file_operations keys_proc_fops = {
1179         .owner          = THIS_MODULE,
1180         .open           = keys_proc_open,
1181         .read           = seq_read,
1182         .llseek         = seq_lseek,
1183         .release        = single_release,
1184         .write          = keys_proc_write,
1185 };
1186
1187 static int version_proc_show(struct seq_file *m, void *v)
1188 {
1189         seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
1190         seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
1191         return 0;
1192 }
1193
1194 static int version_proc_open(struct inode *inode, struct file *file)
1195 {
1196         return single_open(file, version_proc_show, PDE_DATA(inode));
1197 }
1198
1199 static const struct file_operations version_proc_fops = {
1200         .owner          = THIS_MODULE,
1201         .open           = version_proc_open,
1202         .read           = seq_read,
1203         .llseek         = seq_lseek,
1204         .release        = single_release,
1205 };
1206
1207 /* proc and module init
1208  */
1209
1210 #define PROC_TOSHIBA            "toshiba"
1211
1212 static void create_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
1213 {
1214         if (dev->backlight_dev)
1215                 proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1216                                  &lcd_proc_fops, dev);
1217         if (dev->video_supported)
1218                 proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1219                                  &video_proc_fops, dev);
1220         if (dev->fan_supported)
1221                 proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1222                                  &fan_proc_fops, dev);
1223         if (dev->hotkey_dev)
1224                 proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir,
1225                                  &keys_proc_fops, dev);
1226         proc_create_data("version", S_IRUGO, toshiba_proc_dir,
1227                          &version_proc_fops, dev);
1228 }
1229
1230 static void remove_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
1231 {
1232         if (dev->backlight_dev)
1233                 remove_proc_entry("lcd", toshiba_proc_dir);
1234         if (dev->video_supported)
1235                 remove_proc_entry("video", toshiba_proc_dir);
1236         if (dev->fan_supported)
1237                 remove_proc_entry("fan", toshiba_proc_dir);
1238         if (dev->hotkey_dev)
1239                 remove_proc_entry("keys", toshiba_proc_dir);
1240         remove_proc_entry("version", toshiba_proc_dir);
1241 }
1242
1243 static const struct backlight_ops toshiba_backlight_data = {
1244         .options = BL_CORE_SUSPENDRESUME,
1245         .get_brightness = get_lcd_brightness,
1246         .update_status  = set_lcd_status,
1247 };
1248
1249 /*
1250  * Sysfs files
1251  */
1252
1253 static ssize_t toshiba_kbd_bl_mode_store(struct device *dev,
1254                                          struct device_attribute *attr,
1255                                          const char *buf, size_t count)
1256 {
1257         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1258         int mode = -1;
1259         int time = -1;
1260
1261         if (sscanf(buf, "%i", &mode) != 1 && (mode != 2 || mode != 1))
1262                 return -EINVAL;
1263
1264         /* Set the Keyboard Backlight Mode where:
1265          * Mode - Auto (2) | FN-Z (1)
1266          *      Auto - KBD backlight turns off automatically in given time
1267          *      FN-Z - KBD backlight "toggles" when hotkey pressed
1268          */
1269         if (mode != -1 && toshiba->kbd_mode != mode) {
1270                 time = toshiba->kbd_time << HCI_MISC_SHIFT;
1271                 time = time + toshiba->kbd_mode;
1272                 if (toshiba_kbd_illum_status_set(toshiba, time) < 0)
1273                         return -EIO;
1274                 toshiba->kbd_mode = mode;
1275         }
1276
1277         return count;
1278 }
1279
1280 static ssize_t toshiba_kbd_bl_mode_show(struct device *dev,
1281                                         struct device_attribute *attr,
1282                                         char *buf)
1283 {
1284         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1285         u32 time;
1286
1287         if (toshiba_kbd_illum_status_get(toshiba, &time) < 0)
1288                 return -EIO;
1289
1290         return sprintf(buf, "%i\n", time & 0x07);
1291 }
1292
1293 static ssize_t toshiba_kbd_bl_timeout_store(struct device *dev,
1294                                             struct device_attribute *attr,
1295                                             const char *buf, size_t count)
1296 {
1297         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1298         int time = -1;
1299
1300         if (sscanf(buf, "%i", &time) != 1 && (time < 0 || time > 60))
1301                 return -EINVAL;
1302
1303         /* Set the Keyboard Backlight Timeout: 0-60 seconds */
1304         if (time != -1 && toshiba->kbd_time != time) {
1305                 time = time << HCI_MISC_SHIFT;
1306                 time = (toshiba->kbd_mode == SCI_KBD_MODE_AUTO) ?
1307                                                         time + 1 : time + 2;
1308                 if (toshiba_kbd_illum_status_set(toshiba, time) < 0)
1309                         return -EIO;
1310                 toshiba->kbd_time = time >> HCI_MISC_SHIFT;
1311         }
1312
1313         return count;
1314 }
1315
1316 static ssize_t toshiba_kbd_bl_timeout_show(struct device *dev,
1317                                            struct device_attribute *attr,
1318                                            char *buf)
1319 {
1320         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1321         u32 time;
1322
1323         if (toshiba_kbd_illum_status_get(toshiba, &time) < 0)
1324                 return -EIO;
1325
1326         return sprintf(buf, "%i\n", time >> HCI_MISC_SHIFT);
1327 }
1328
1329 static ssize_t toshiba_touchpad_store(struct device *dev,
1330                                       struct device_attribute *attr,
1331                                       const char *buf, size_t count)
1332 {
1333         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1334         int state;
1335
1336         /* Set the TouchPad on/off, 0 - Disable | 1 - Enable */
1337         if (sscanf(buf, "%i", &state) == 1 && (state == 0 || state == 1)) {
1338                 if (toshiba_touchpad_set(toshiba, state) < 0)
1339                         return -EIO;
1340         }
1341
1342         return count;
1343 }
1344
1345 static ssize_t toshiba_touchpad_show(struct device *dev,
1346                                      struct device_attribute *attr, char *buf)
1347 {
1348         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1349         u32 state;
1350         int ret;
1351
1352         ret = toshiba_touchpad_get(toshiba, &state);
1353         if (ret < 0)
1354                 return ret;
1355
1356         return sprintf(buf, "%i\n", state);
1357 }
1358
1359 static ssize_t toshiba_position_show(struct device *dev,
1360                                      struct device_attribute *attr, char *buf)
1361 {
1362         struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);
1363         u32 xyval, zval, tmp;
1364         u16 x, y, z;
1365         int ret;
1366
1367         xyval = zval = 0;
1368         ret = toshiba_accelerometer_get(toshiba, &xyval, &zval);
1369         if (ret < 0)
1370                 return ret;
1371
1372         x = xyval & HCI_ACCEL_MASK;
1373         tmp = xyval >> HCI_MISC_SHIFT;
1374         y = tmp & HCI_ACCEL_MASK;
1375         z = zval & HCI_ACCEL_MASK;
1376
1377         return sprintf(buf, "%d %d %d\n", x, y, z);
1378 }
1379
1380 static DEVICE_ATTR(kbd_backlight_mode, S_IRUGO | S_IWUSR,
1381                    toshiba_kbd_bl_mode_show, toshiba_kbd_bl_mode_store);
1382 static DEVICE_ATTR(kbd_backlight_timeout, S_IRUGO | S_IWUSR,
1383                    toshiba_kbd_bl_timeout_show, toshiba_kbd_bl_timeout_store);
1384 static DEVICE_ATTR(touchpad, S_IRUGO | S_IWUSR,
1385                    toshiba_touchpad_show, toshiba_touchpad_store);
1386 static DEVICE_ATTR(position, S_IRUGO, toshiba_position_show, NULL);
1387
1388 static struct attribute *toshiba_attributes[] = {
1389         &dev_attr_kbd_backlight_mode.attr,
1390         &dev_attr_kbd_backlight_timeout.attr,
1391         &dev_attr_touchpad.attr,
1392         &dev_attr_position.attr,
1393         NULL,
1394 };
1395
1396 static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,
1397                                         struct attribute *attr, int idx)
1398 {
1399         struct device *dev = container_of(kobj, struct device, kobj);
1400         struct toshiba_acpi_dev *drv = dev_get_drvdata(dev);
1401         bool exists = true;
1402
1403         if (attr == &dev_attr_kbd_backlight_mode.attr)
1404                 exists = (drv->kbd_illum_supported) ? true : false;
1405         else if (attr == &dev_attr_kbd_backlight_timeout.attr)
1406                 exists = (drv->kbd_mode == SCI_KBD_MODE_AUTO) ? true : false;
1407         else if (attr == &dev_attr_touchpad.attr)
1408                 exists = (drv->touchpad_supported) ? true : false;
1409         else if (attr == &dev_attr_position.attr)
1410                 exists = (drv->accelerometer_supported) ? true : false;
1411
1412         return exists ? attr->mode : 0;
1413 }
1414
1415 static struct attribute_group toshiba_attr_group = {
1416         .is_visible = toshiba_sysfs_is_visible,
1417         .attrs = toshiba_attributes,
1418 };
1419
1420 static bool toshiba_acpi_i8042_filter(unsigned char data, unsigned char str,
1421                                       struct serio *port)
1422 {
1423         if (str & 0x20)
1424                 return false;
1425
1426         if (unlikely(data == 0xe0))
1427                 return false;
1428
1429         if ((data & 0x7f) == TOS1900_FN_SCAN) {
1430                 schedule_work(&toshiba_acpi->hotkey_work);
1431                 return true;
1432         }
1433
1434         return false;
1435 }
1436
1437 static void toshiba_acpi_hotkey_work(struct work_struct *work)
1438 {
1439         acpi_handle ec_handle = ec_get_handle();
1440         acpi_status status;
1441
1442         if (!ec_handle)
1443                 return;
1444
1445         status = acpi_evaluate_object(ec_handle, "NTFY", NULL, NULL);
1446         if (ACPI_FAILURE(status))
1447                 pr_err("ACPI NTFY method execution failed\n");
1448 }
1449
1450 /*
1451  * Returns hotkey scancode, or < 0 on failure.
1452  */
1453 static int toshiba_acpi_query_hotkey(struct toshiba_acpi_dev *dev)
1454 {
1455         unsigned long long value;
1456         acpi_status status;
1457
1458         status = acpi_evaluate_integer(dev->acpi_dev->handle, "INFO",
1459                                       NULL, &value);
1460         if (ACPI_FAILURE(status)) {
1461                 pr_err("ACPI INFO method execution failed\n");
1462                 return -EIO;
1463         }
1464
1465         return value;
1466 }
1467
1468 static void toshiba_acpi_report_hotkey(struct toshiba_acpi_dev *dev,
1469                                        int scancode)
1470 {
1471         if (scancode == 0x100)
1472                 return;
1473
1474         /* act on key press; ignore key release */
1475         if (scancode & 0x80)
1476                 return;
1477
1478         if (!sparse_keymap_report_event(dev->hotkey_dev, scancode, 1, true))
1479                 pr_info("Unknown key %x\n", scancode);
1480 }
1481
1482 static int toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
1483 {
1484         acpi_status status;
1485         acpi_handle ec_handle;
1486         int error;
1487         u32 hci_result;
1488         const struct key_entry *keymap = toshiba_acpi_keymap;
1489
1490         dev->hotkey_dev = input_allocate_device();
1491         if (!dev->hotkey_dev)
1492                 return -ENOMEM;
1493
1494         dev->hotkey_dev->name = "Toshiba input device";
1495         dev->hotkey_dev->phys = "toshiba_acpi/input0";
1496         dev->hotkey_dev->id.bustype = BUS_HOST;
1497
1498         if (dmi_check_system(toshiba_alt_keymap_dmi))
1499                 keymap = toshiba_acpi_alt_keymap;
1500         error = sparse_keymap_setup(dev->hotkey_dev, keymap, NULL);
1501         if (error)
1502                 goto err_free_dev;
1503
1504         /*
1505          * For some machines the SCI responsible for providing hotkey
1506          * notification doesn't fire. We can trigger the notification
1507          * whenever the Fn key is pressed using the NTFY method, if
1508          * supported, so if it's present set up an i8042 key filter
1509          * for this purpose.
1510          */
1511         status = AE_ERROR;
1512         ec_handle = ec_get_handle();
1513         if (ec_handle && acpi_has_method(ec_handle, "NTFY")) {
1514                 INIT_WORK(&dev->hotkey_work, toshiba_acpi_hotkey_work);
1515
1516                 error = i8042_install_filter(toshiba_acpi_i8042_filter);
1517                 if (error) {
1518                         pr_err("Error installing key filter\n");
1519                         goto err_free_keymap;
1520                 }
1521
1522                 dev->ntfy_supported = 1;
1523         }
1524
1525         /*
1526          * Determine hotkey query interface. Prefer using the INFO
1527          * method when it is available.
1528          */
1529         if (acpi_has_method(dev->acpi_dev->handle, "INFO"))
1530                 dev->info_supported = 1;
1531         else {
1532                 hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
1533                 if (hci_result == HCI_SUCCESS)
1534                         dev->system_event_supported = 1;
1535         }
1536
1537         if (!dev->info_supported && !dev->system_event_supported) {
1538                 pr_warn("No hotkey query interface found\n");
1539                 goto err_remove_filter;
1540         }
1541
1542         status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL);
1543         if (ACPI_FAILURE(status)) {
1544                 pr_info("Unable to enable hotkeys\n");
1545                 error = -ENODEV;
1546                 goto err_remove_filter;
1547         }
1548
1549         error = input_register_device(dev->hotkey_dev);
1550         if (error) {
1551                 pr_info("Unable to register input device\n");
1552                 goto err_remove_filter;
1553         }
1554
1555         hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &hci_result);
1556         return 0;
1557
1558  err_remove_filter:
1559         if (dev->ntfy_supported)
1560                 i8042_remove_filter(toshiba_acpi_i8042_filter);
1561  err_free_keymap:
1562         sparse_keymap_free(dev->hotkey_dev);
1563  err_free_dev:
1564         input_free_device(dev->hotkey_dev);
1565         dev->hotkey_dev = NULL;
1566         return error;
1567 }
1568
1569 static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev)
1570 {
1571         struct backlight_properties props;
1572         int brightness;
1573         int ret;
1574         bool enabled;
1575
1576         /*
1577          * Some machines don't support the backlight methods at all, and
1578          * others support it read-only. Either of these is pretty useless,
1579          * so only register the backlight device if the backlight method
1580          * supports both reads and writes.
1581          */
1582         brightness = __get_lcd_brightness(dev);
1583         if (brightness < 0)
1584                 return 0;
1585         ret = set_lcd_brightness(dev, brightness);
1586         if (ret) {
1587                 pr_debug("Backlight method is read-only, disabling backlight support\n");
1588                 return 0;
1589         }
1590
1591         /* Determine whether or not BIOS supports transflective backlight */
1592         ret = get_tr_backlight_status(dev, &enabled);
1593         dev->tr_backlight_supported = !ret;
1594
1595         memset(&props, 0, sizeof(props));
1596         props.type = BACKLIGHT_PLATFORM;
1597         props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
1598
1599         /* adding an extra level and having 0 change to transflective mode */
1600         if (dev->tr_backlight_supported)
1601                 props.max_brightness++;
1602
1603         dev->backlight_dev = backlight_device_register("toshiba",
1604                                                        &dev->acpi_dev->dev,
1605                                                        dev,
1606                                                        &toshiba_backlight_data,
1607                                                        &props);
1608         if (IS_ERR(dev->backlight_dev)) {
1609                 ret = PTR_ERR(dev->backlight_dev);
1610                 pr_err("Could not register toshiba backlight device\n");
1611                 dev->backlight_dev = NULL;
1612                 return ret;
1613         }
1614
1615         dev->backlight_dev->props.brightness = brightness;
1616         return 0;
1617 }
1618
1619 static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
1620 {
1621         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1622
1623         remove_toshiba_proc_entries(dev);
1624
1625         if (dev->sysfs_created)
1626                 sysfs_remove_group(&dev->acpi_dev->dev.kobj,
1627                                    &toshiba_attr_group);
1628
1629         if (dev->ntfy_supported) {
1630                 i8042_remove_filter(toshiba_acpi_i8042_filter);
1631                 cancel_work_sync(&dev->hotkey_work);
1632         }
1633
1634         if (dev->hotkey_dev) {
1635                 input_unregister_device(dev->hotkey_dev);
1636                 sparse_keymap_free(dev->hotkey_dev);
1637         }
1638
1639         if (dev->bt_rfk) {
1640                 rfkill_unregister(dev->bt_rfk);
1641                 rfkill_destroy(dev->bt_rfk);
1642         }
1643
1644         if (dev->backlight_dev)
1645                 backlight_device_unregister(dev->backlight_dev);
1646
1647         if (dev->illumination_supported)
1648                 led_classdev_unregister(&dev->led_dev);
1649
1650         if (dev->kbd_led_registered)
1651                 led_classdev_unregister(&dev->kbd_led);
1652
1653         if (dev->eco_supported)
1654                 led_classdev_unregister(&dev->eco_led);
1655
1656         if (toshiba_acpi)
1657                 toshiba_acpi = NULL;
1658
1659         kfree(dev);
1660
1661         return 0;
1662 }
1663
1664 static const char *find_hci_method(acpi_handle handle)
1665 {
1666         if (acpi_has_method(handle, "GHCI"))
1667                 return "GHCI";
1668
1669         if (acpi_has_method(handle, "SPFC"))
1670                 return "SPFC";
1671
1672         return NULL;
1673 }
1674
1675 static int toshiba_acpi_add(struct acpi_device *acpi_dev)
1676 {
1677         struct toshiba_acpi_dev *dev;
1678         const char *hci_method;
1679         u32 dummy;
1680         bool bt_present;
1681         int ret = 0;
1682
1683         if (toshiba_acpi)
1684                 return -EBUSY;
1685
1686         pr_info("Toshiba Laptop ACPI Extras version %s\n",
1687                TOSHIBA_ACPI_VERSION);
1688
1689         hci_method = find_hci_method(acpi_dev->handle);
1690         if (!hci_method) {
1691                 pr_err("HCI interface not found\n");
1692                 return -ENODEV;
1693         }
1694
1695         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1696         if (!dev)
1697                 return -ENOMEM;
1698         dev->acpi_dev = acpi_dev;
1699         dev->method_hci = hci_method;
1700         acpi_dev->driver_data = dev;
1701         dev_set_drvdata(&acpi_dev->dev, dev);
1702
1703         if (toshiba_acpi_setup_keyboard(dev))
1704                 pr_info("Unable to activate hotkeys\n");
1705
1706         mutex_init(&dev->mutex);
1707
1708         ret = toshiba_acpi_setup_backlight(dev);
1709         if (ret)
1710                 goto error;
1711
1712         /* Register rfkill switch for Bluetooth */
1713         if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) {
1714                 dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth",
1715                                            &acpi_dev->dev,
1716                                            RFKILL_TYPE_BLUETOOTH,
1717                                            &toshiba_rfk_ops,
1718                                            dev);
1719                 if (!dev->bt_rfk) {
1720                         pr_err("unable to allocate rfkill device\n");
1721                         ret = -ENOMEM;
1722                         goto error;
1723                 }
1724
1725                 ret = rfkill_register(dev->bt_rfk);
1726                 if (ret) {
1727                         pr_err("unable to register rfkill device\n");
1728                         rfkill_destroy(dev->bt_rfk);
1729                         goto error;
1730                 }
1731         }
1732
1733         if (toshiba_illumination_available(dev)) {
1734                 dev->led_dev.name = "toshiba::illumination";
1735                 dev->led_dev.max_brightness = 1;
1736                 dev->led_dev.brightness_set = toshiba_illumination_set;
1737                 dev->led_dev.brightness_get = toshiba_illumination_get;
1738                 if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
1739                         dev->illumination_supported = 1;
1740         }
1741
1742         if (toshiba_eco_mode_available(dev)) {
1743                 dev->eco_led.name = "toshiba::eco_mode";
1744                 dev->eco_led.max_brightness = 1;
1745                 dev->eco_led.brightness_set = toshiba_eco_mode_set_status;
1746                 dev->eco_led.brightness_get = toshiba_eco_mode_get_status;
1747                 if (!led_classdev_register(&dev->acpi_dev->dev, &dev->eco_led))
1748                         dev->eco_supported = 1;
1749         }
1750
1751         ret = toshiba_kbd_illum_status_get(dev, &dummy);
1752         if (!ret) {
1753                 dev->kbd_time = dummy >> HCI_MISC_SHIFT;
1754                 dev->kbd_mode = dummy & 0x07;
1755         }
1756         dev->kbd_illum_supported = !ret;
1757         /*
1758          * Only register the LED if KBD illumination is supported
1759          * and the keyboard backlight operation mode is set to FN-Z
1760          */
1761         if (dev->kbd_illum_supported && dev->kbd_mode == SCI_KBD_MODE_FNZ) {
1762                 dev->kbd_led.name = "toshiba::kbd_backlight";
1763                 dev->kbd_led.max_brightness = 1;
1764                 dev->kbd_led.brightness_set = toshiba_kbd_backlight_set;
1765                 dev->kbd_led.brightness_get = toshiba_kbd_backlight_get;
1766                 if (!led_classdev_register(&dev->acpi_dev->dev, &dev->kbd_led))
1767                         dev->kbd_led_registered = 1;
1768         }
1769
1770         ret = toshiba_touchpad_get(dev, &dummy);
1771         dev->touchpad_supported = !ret;
1772
1773         ret = toshiba_accelerometer_supported(dev);
1774         dev->accelerometer_supported = !ret;
1775
1776         /* Determine whether or not BIOS supports fan and video interfaces */
1777
1778         ret = get_video_status(dev, &dummy);
1779         dev->video_supported = !ret;
1780
1781         ret = get_fan_status(dev, &dummy);
1782         dev->fan_supported = !ret;
1783
1784         ret = sysfs_create_group(&dev->acpi_dev->dev.kobj,
1785                                  &toshiba_attr_group);
1786         if (ret) {
1787                 dev->sysfs_created = 0;
1788                 goto error;
1789         }
1790         dev->sysfs_created = !ret;
1791
1792         create_toshiba_proc_entries(dev);
1793
1794         toshiba_acpi = dev;
1795
1796         return 0;
1797
1798 error:
1799         toshiba_acpi_remove(acpi_dev);
1800         return ret;
1801 }
1802
1803 static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event)
1804 {
1805         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1806         u32 hci_result, value;
1807         int retries = 3;
1808         int scancode;
1809
1810         if (event != 0x80)
1811                 return;
1812
1813         if (dev->info_supported) {
1814                 scancode = toshiba_acpi_query_hotkey(dev);
1815                 if (scancode < 0)
1816                         pr_err("Failed to query hotkey event\n");
1817                 else if (scancode != 0)
1818                         toshiba_acpi_report_hotkey(dev, scancode);
1819         } else if (dev->system_event_supported) {
1820                 do {
1821                         hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
1822                         switch (hci_result) {
1823                         case HCI_SUCCESS:
1824                                 toshiba_acpi_report_hotkey(dev, (int)value);
1825                                 break;
1826                         case HCI_NOT_SUPPORTED:
1827                                 /*
1828                                  * This is a workaround for an unresolved
1829                                  * issue on some machines where system events
1830                                  * sporadically become disabled.
1831                                  */
1832                                 hci_write1(dev, HCI_SYSTEM_EVENT, 1,
1833                                            &hci_result);
1834                                 pr_notice("Re-enabled hotkeys\n");
1835                                 /* fall through */
1836                         default:
1837                                 retries--;
1838                                 break;
1839                         }
1840                 } while (retries && hci_result != HCI_EMPTY);
1841         }
1842 }
1843
1844 #ifdef CONFIG_PM_SLEEP
1845 static int toshiba_acpi_suspend(struct device *device)
1846 {
1847         struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
1848         u32 result;
1849
1850         if (dev->hotkey_dev)
1851                 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_DISABLE, &result);
1852
1853         return 0;
1854 }
1855
1856 static int toshiba_acpi_resume(struct device *device)
1857 {
1858         struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
1859         u32 result;
1860
1861         if (dev->hotkey_dev)
1862                 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &result);
1863
1864         return 0;
1865 }
1866 #endif
1867
1868 static SIMPLE_DEV_PM_OPS(toshiba_acpi_pm,
1869                          toshiba_acpi_suspend, toshiba_acpi_resume);
1870
1871 static struct acpi_driver toshiba_acpi_driver = {
1872         .name   = "Toshiba ACPI driver",
1873         .owner  = THIS_MODULE,
1874         .ids    = toshiba_device_ids,
1875         .flags  = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1876         .ops    = {
1877                 .add            = toshiba_acpi_add,
1878                 .remove         = toshiba_acpi_remove,
1879                 .notify         = toshiba_acpi_notify,
1880         },
1881         .drv.pm = &toshiba_acpi_pm,
1882 };
1883
1884 static int __init toshiba_acpi_init(void)
1885 {
1886         int ret;
1887
1888         /*
1889          * Machines with this WMI guid aren't supported due to bugs in
1890          * their AML. This check relies on wmi initializing before
1891          * toshiba_acpi to guarantee guids have been identified.
1892          */
1893         if (wmi_has_guid(TOSHIBA_WMI_EVENT_GUID))
1894                 return -ENODEV;
1895
1896         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
1897         if (!toshiba_proc_dir) {
1898                 pr_err("Unable to create proc dir " PROC_TOSHIBA "\n");
1899                 return -ENODEV;
1900         }
1901
1902         ret = acpi_bus_register_driver(&toshiba_acpi_driver);
1903         if (ret) {
1904                 pr_err("Failed to register ACPI driver: %d\n", ret);
1905                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1906         }
1907
1908         return ret;
1909 }
1910
1911 static void __exit toshiba_acpi_exit(void)
1912 {
1913         acpi_bus_unregister_driver(&toshiba_acpi_driver);
1914         if (toshiba_proc_dir)
1915                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1916 }
1917
1918 module_init(toshiba_acpi_init);
1919 module_exit(toshiba_acpi_exit);