drivers/platform/x86/toshiba_acpi.c

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