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