linux/drivers/platform/x86/toshiba_acpi.c
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   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
  58#include <asm/uaccess.h>
  59
  60#include <acpi/acpi_drivers.h>
  61
  62MODULE_AUTHOR("John Belmonte");
  63MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
  64MODULE_LICENSE("GPL");
  65
  66#define TOSHIBA_WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"
  67
  68/* Scan code for Fn key on TOS1900 models */
  69#define TOS1900_FN_SCAN         0x6e
  70
  71/* Toshiba ACPI method paths */
  72#define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
  73
  74/* Toshiba HCI interface definitions
  75 *
  76 * HCI is Toshiba's "Hardware Control Interface" which is supposed to
  77 * be uniform across all their models.  Ideally we would just call
  78 * dedicated ACPI methods instead of using this primitive interface.
  79 * However the ACPI methods seem to be incomplete in some areas (for
  80 * example they allow setting, but not reading, the LCD brightness value),
  81 * so this is still useful.
  82 */
  83
  84#define HCI_WORDS                       6
  85
  86/* operations */
  87#define HCI_SET                         0xff00
  88#define HCI_GET                         0xfe00
  89
  90/* return codes */
  91#define HCI_SUCCESS                     0x0000
  92#define HCI_FAILURE                     0x1000
  93#define HCI_NOT_SUPPORTED               0x8000
  94#define HCI_EMPTY                       0x8c00
  95
  96/* registers */
  97#define HCI_FAN                         0x0004
  98#define HCI_TR_BACKLIGHT                0x0005
  99#define HCI_SYSTEM_EVENT                0x0016
 100#define HCI_VIDEO_OUT                   0x001c
 101#define HCI_HOTKEY_EVENT                0x001e
 102#define HCI_LCD_BRIGHTNESS              0x002a
 103#define HCI_WIRELESS                    0x0056
 104
 105/* field definitions */
 106#define HCI_HOTKEY_DISABLE              0x0b
 107#define HCI_HOTKEY_ENABLE               0x09
 108#define HCI_LCD_BRIGHTNESS_BITS         3
 109#define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
 110#define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
 111#define HCI_VIDEO_OUT_LCD               0x1
 112#define HCI_VIDEO_OUT_CRT               0x2
 113#define HCI_VIDEO_OUT_TV                0x4
 114#define HCI_WIRELESS_KILL_SWITCH        0x01
 115#define HCI_WIRELESS_BT_PRESENT         0x0f
 116#define HCI_WIRELESS_BT_ATTACH          0x40
 117#define HCI_WIRELESS_BT_POWER           0x80
 118
 119struct toshiba_acpi_dev {
 120        struct acpi_device *acpi_dev;
 121        const char *method_hci;
 122        struct rfkill *bt_rfk;
 123        struct input_dev *hotkey_dev;
 124        struct work_struct hotkey_work;
 125        struct backlight_device *backlight_dev;
 126        struct led_classdev led_dev;
 127
 128        int force_fan;
 129        int last_key_event;
 130        int key_event_valid;
 131
 132        unsigned int illumination_supported:1;
 133        unsigned int video_supported:1;
 134        unsigned int fan_supported:1;
 135        unsigned int system_event_supported:1;
 136        unsigned int ntfy_supported:1;
 137        unsigned int info_supported:1;
 138        unsigned int tr_backlight_supported:1;
 139
 140        struct mutex mutex;
 141};
 142
 143static struct toshiba_acpi_dev *toshiba_acpi;
 144
 145static const struct acpi_device_id toshiba_device_ids[] = {
 146        {"TOS6200", 0},
 147        {"TOS6208", 0},
 148        {"TOS1900", 0},
 149        {"", 0},
 150};
 151MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
 152
 153static const struct key_entry toshiba_acpi_keymap[] = {
 154        { KE_KEY, 0x101, { KEY_MUTE } },
 155        { KE_KEY, 0x102, { KEY_ZOOMOUT } },
 156        { KE_KEY, 0x103, { KEY_ZOOMIN } },
 157        { KE_KEY, 0x12c, { KEY_KBDILLUMTOGGLE } },
 158        { KE_KEY, 0x139, { KEY_ZOOMRESET } },
 159        { KE_KEY, 0x13b, { KEY_COFFEE } },
 160        { KE_KEY, 0x13c, { KEY_BATTERY } },
 161        { KE_KEY, 0x13d, { KEY_SLEEP } },
 162        { KE_KEY, 0x13e, { KEY_SUSPEND } },
 163        { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } },
 164        { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } },
 165        { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } },
 166        { KE_KEY, 0x142, { KEY_WLAN } },
 167        { KE_KEY, 0x143, { KEY_TOUCHPAD_TOGGLE } },
 168        { KE_KEY, 0x17f, { KEY_FN } },
 169        { KE_KEY, 0xb05, { KEY_PROG2 } },
 170        { KE_KEY, 0xb06, { KEY_WWW } },
 171        { KE_KEY, 0xb07, { KEY_MAIL } },
 172        { KE_KEY, 0xb30, { KEY_STOP } },
 173        { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } },
 174        { KE_KEY, 0xb32, { KEY_NEXTSONG } },
 175        { KE_KEY, 0xb33, { KEY_PLAYPAUSE } },
 176        { KE_KEY, 0xb5a, { KEY_MEDIA } },
 177        { KE_IGNORE, 0x1430, { KEY_RESERVED } },
 178        { KE_END, 0 },
 179};
 180
 181/* utility
 182 */
 183
 184static __inline__ void _set_bit(u32 * word, u32 mask, int value)
 185{
 186        *word = (*word & ~mask) | (mask * value);
 187}
 188
 189/* acpi interface wrappers
 190 */
 191
 192static int write_acpi_int(const char *methodName, int val)
 193{
 194        struct acpi_object_list params;
 195        union acpi_object in_objs[1];
 196        acpi_status status;
 197
 198        params.count = ARRAY_SIZE(in_objs);
 199        params.pointer = in_objs;
 200        in_objs[0].type = ACPI_TYPE_INTEGER;
 201        in_objs[0].integer.value = val;
 202
 203        status = acpi_evaluate_object(NULL, (char *)methodName, &params, NULL);
 204        return (status == AE_OK) ? 0 : -EIO;
 205}
 206
 207/* Perform a raw HCI call.  Here we don't care about input or output buffer
 208 * format.
 209 */
 210static acpi_status hci_raw(struct toshiba_acpi_dev *dev,
 211                           const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
 212{
 213        struct acpi_object_list params;
 214        union acpi_object in_objs[HCI_WORDS];
 215        struct acpi_buffer results;
 216        union acpi_object out_objs[HCI_WORDS + 1];
 217        acpi_status status;
 218        int i;
 219
 220        params.count = HCI_WORDS;
 221        params.pointer = in_objs;
 222        for (i = 0; i < HCI_WORDS; ++i) {
 223                in_objs[i].type = ACPI_TYPE_INTEGER;
 224                in_objs[i].integer.value = in[i];
 225        }
 226
 227        results.length = sizeof(out_objs);
 228        results.pointer = out_objs;
 229
 230        status = acpi_evaluate_object(dev->acpi_dev->handle,
 231                                      (char *)dev->method_hci, &params,
 232                                      &results);
 233        if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
 234                for (i = 0; i < out_objs->package.count; ++i) {
 235                        out[i] = out_objs->package.elements[i].integer.value;
 236                }
 237        }
 238
 239        return status;
 240}
 241
 242/* common hci tasks (get or set one or two value)
 243 *
 244 * In addition to the ACPI status, the HCI system returns a result which
 245 * may be useful (such as "not supported").
 246 */
 247
 248static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg,
 249                              u32 in1, u32 *result)
 250{
 251        u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
 252        u32 out[HCI_WORDS];
 253        acpi_status status = hci_raw(dev, in, out);
 254        *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 255        return status;
 256}
 257
 258static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg,
 259                             u32 *out1, u32 *result)
 260{
 261        u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
 262        u32 out[HCI_WORDS];
 263        acpi_status status = hci_raw(dev, in, out);
 264        *out1 = out[2];
 265        *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 266        return status;
 267}
 268
 269static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg,
 270                              u32 in1, u32 in2, u32 *result)
 271{
 272        u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
 273        u32 out[HCI_WORDS];
 274        acpi_status status = hci_raw(dev, in, out);
 275        *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 276        return status;
 277}
 278
 279static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg,
 280                             u32 *out1, u32 *out2, u32 *result)
 281{
 282        u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
 283        u32 out[HCI_WORDS];
 284        acpi_status status = hci_raw(dev, in, out);
 285        *out1 = out[2];
 286        *out2 = out[3];
 287        *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 288        return status;
 289}
 290
 291/* Illumination support */
 292static int toshiba_illumination_available(struct toshiba_acpi_dev *dev)
 293{
 294        u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 295        u32 out[HCI_WORDS];
 296        acpi_status status;
 297
 298        in[0] = 0xf100;
 299        status = hci_raw(dev, in, out);
 300        if (ACPI_FAILURE(status)) {
 301                pr_info("Illumination device not available\n");
 302                return 0;
 303        }
 304        in[0] = 0xf400;
 305        status = hci_raw(dev, in, out);
 306        return 1;
 307}
 308
 309static void toshiba_illumination_set(struct led_classdev *cdev,
 310                                     enum led_brightness brightness)
 311{
 312        struct toshiba_acpi_dev *dev = container_of(cdev,
 313                        struct toshiba_acpi_dev, led_dev);
 314        u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 315        u32 out[HCI_WORDS];
 316        acpi_status status;
 317
 318        /* First request : initialize communication. */
 319        in[0] = 0xf100;
 320        status = hci_raw(dev, in, out);
 321        if (ACPI_FAILURE(status)) {
 322                pr_info("Illumination device not available\n");
 323                return;
 324        }
 325
 326        if (brightness) {
 327                /* Switch the illumination on */
 328                in[0] = 0xf400;
 329                in[1] = 0x14e;
 330                in[2] = 1;
 331                status = hci_raw(dev, in, out);
 332                if (ACPI_FAILURE(status)) {
 333                        pr_info("ACPI call for illumination failed\n");
 334                        return;
 335                }
 336        } else {
 337                /* Switch the illumination off */
 338                in[0] = 0xf400;
 339                in[1] = 0x14e;
 340                in[2] = 0;
 341                status = hci_raw(dev, in, out);
 342                if (ACPI_FAILURE(status)) {
 343                        pr_info("ACPI call for illumination failed.\n");
 344                        return;
 345                }
 346        }
 347
 348        /* Last request : close communication. */
 349        in[0] = 0xf200;
 350        in[1] = 0;
 351        in[2] = 0;
 352        hci_raw(dev, in, out);
 353}
 354
 355static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
 356{
 357        struct toshiba_acpi_dev *dev = container_of(cdev,
 358                        struct toshiba_acpi_dev, led_dev);
 359        u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 360        u32 out[HCI_WORDS];
 361        acpi_status status;
 362        enum led_brightness result;
 363
 364        /* First request : initialize communication. */
 365        in[0] = 0xf100;
 366        status = hci_raw(dev, in, out);
 367        if (ACPI_FAILURE(status)) {
 368                pr_info("Illumination device not available\n");
 369                return LED_OFF;
 370        }
 371
 372        /* Check the illumination */
 373        in[0] = 0xf300;
 374        in[1] = 0x14e;
 375        status = hci_raw(dev, in, out);
 376        if (ACPI_FAILURE(status)) {
 377                pr_info("ACPI call for illumination failed.\n");
 378                return LED_OFF;
 379        }
 380
 381        result = out[2] ? LED_FULL : LED_OFF;
 382
 383        /* Last request : close communication. */
 384        in[0] = 0xf200;
 385        in[1] = 0;
 386        in[2] = 0;
 387        hci_raw(dev, in, out);
 388
 389        return result;
 390}
 391
 392/* Bluetooth rfkill handlers */
 393
 394static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)
 395{
 396        u32 hci_result;
 397        u32 value, value2;
 398
 399        value = 0;
 400        value2 = 0;
 401        hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
 402        if (hci_result == HCI_SUCCESS)
 403                *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
 404
 405        return hci_result;
 406}
 407
 408static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state)
 409{
 410        u32 hci_result;
 411        u32 value, value2;
 412
 413        value = 0;
 414        value2 = 0x0001;
 415        hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
 416
 417        *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
 418        return hci_result;
 419}
 420
 421static int bt_rfkill_set_block(void *data, bool blocked)
 422{
 423        struct toshiba_acpi_dev *dev = data;
 424        u32 result1, result2;
 425        u32 value;
 426        int err;
 427        bool radio_state;
 428
 429        value = (blocked == false);
 430
 431        mutex_lock(&dev->mutex);
 432        if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) {
 433                err = -EIO;
 434                goto out;
 435        }
 436
 437        if (!radio_state) {
 438                err = 0;
 439                goto out;
 440        }
 441
 442        hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
 443        hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
 444
 445        if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
 446                err = -EIO;
 447        else
 448                err = 0;
 449 out:
 450        mutex_unlock(&dev->mutex);
 451        return err;
 452}
 453
 454static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
 455{
 456        bool new_rfk_state;
 457        bool value;
 458        u32 hci_result;
 459        struct toshiba_acpi_dev *dev = data;
 460
 461        mutex_lock(&dev->mutex);
 462
 463        hci_result = hci_get_radio_state(dev, &value);
 464        if (hci_result != HCI_SUCCESS) {
 465                /* Can't do anything useful */
 466                mutex_unlock(&dev->mutex);
 467                return;
 468        }
 469
 470        new_rfk_state = value;
 471
 472        mutex_unlock(&dev->mutex);
 473
 474        if (rfkill_set_hw_state(rfkill, !new_rfk_state))
 475                bt_rfkill_set_block(data, true);
 476}
 477
 478static const struct rfkill_ops toshiba_rfk_ops = {
 479        .set_block = bt_rfkill_set_block,
 480        .poll = bt_rfkill_poll,
 481};
 482
 483static int get_tr_backlight_status(struct toshiba_acpi_dev *dev, bool *enabled)
 484{
 485        u32 hci_result;
 486        u32 status;
 487
 488        hci_read1(dev, HCI_TR_BACKLIGHT, &status, &hci_result);
 489        *enabled = !status;
 490        return hci_result == HCI_SUCCESS ? 0 : -EIO;
 491}
 492
 493static int set_tr_backlight_status(struct toshiba_acpi_dev *dev, bool enable)
 494{
 495        u32 hci_result;
 496        u32 value = !enable;
 497
 498        hci_write1(dev, HCI_TR_BACKLIGHT, value, &hci_result);
 499        return hci_result == HCI_SUCCESS ? 0 : -EIO;
 500}
 501
 502static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
 503
 504static int __get_lcd_brightness(struct toshiba_acpi_dev *dev)
 505{
 506        u32 hci_result;
 507        u32 value;
 508        int brightness = 0;
 509
 510        if (dev->tr_backlight_supported) {
 511                bool enabled;
 512                int ret = get_tr_backlight_status(dev, &enabled);
 513                if (ret)
 514                        return ret;
 515                if (enabled)
 516                        return 0;
 517                brightness++;
 518        }
 519
 520        hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result);
 521        if (hci_result == HCI_SUCCESS)
 522                return brightness + (value >> HCI_LCD_BRIGHTNESS_SHIFT);
 523
 524        return -EIO;
 525}
 526
 527static int get_lcd_brightness(struct backlight_device *bd)
 528{
 529        struct toshiba_acpi_dev *dev = bl_get_data(bd);
 530        return __get_lcd_brightness(dev);
 531}
 532
 533static int lcd_proc_show(struct seq_file *m, void *v)
 534{
 535        struct toshiba_acpi_dev *dev = m->private;
 536        int value;
 537        int levels;
 538
 539        if (!dev->backlight_dev)
 540                return -ENODEV;
 541
 542        levels = dev->backlight_dev->props.max_brightness + 1;
 543        value = get_lcd_brightness(dev->backlight_dev);
 544        if (value >= 0) {
 545                seq_printf(m, "brightness:              %d\n", value);
 546                seq_printf(m, "brightness_levels:       %d\n", levels);
 547                return 0;
 548        }
 549
 550        pr_err("Error reading LCD brightness\n");
 551        return -EIO;
 552}
 553
 554static int lcd_proc_open(struct inode *inode, struct file *file)
 555{
 556        return single_open(file, lcd_proc_show, PDE(inode)->data);
 557}
 558
 559static int set_lcd_brightness(struct toshiba_acpi_dev *dev, int value)
 560{
 561        u32 hci_result;
 562
 563        if (dev->tr_backlight_supported) {
 564                bool enable = !value;
 565                int ret = set_tr_backlight_status(dev, enable);
 566                if (ret)
 567                        return ret;
 568                if (value)
 569                        value--;
 570        }
 571
 572        value = value << HCI_LCD_BRIGHTNESS_SHIFT;
 573        hci_write1(dev, HCI_LCD_BRIGHTNESS, value, &hci_result);
 574        return hci_result == HCI_SUCCESS ? 0 : -EIO;
 575}
 576
 577static int set_lcd_status(struct backlight_device *bd)
 578{
 579        struct toshiba_acpi_dev *dev = bl_get_data(bd);
 580        return set_lcd_brightness(dev, bd->props.brightness);
 581}
 582
 583static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
 584                              size_t count, loff_t *pos)
 585{
 586        struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
 587        char cmd[42];
 588        size_t len;
 589        int value;
 590        int ret;
 591        int levels = dev->backlight_dev->props.max_brightness + 1;
 592
 593        len = min(count, sizeof(cmd) - 1);
 594        if (copy_from_user(cmd, buf, len))
 595                return -EFAULT;
 596        cmd[len] = '\0';
 597
 598        if (sscanf(cmd, " brightness : %i", &value) == 1 &&
 599            value >= 0 && value < levels) {
 600                ret = set_lcd_brightness(dev, value);
 601                if (ret == 0)
 602                        ret = count;
 603        } else {
 604                ret = -EINVAL;
 605        }
 606        return ret;
 607}
 608
 609static const struct file_operations lcd_proc_fops = {
 610        .owner          = THIS_MODULE,
 611        .open           = lcd_proc_open,
 612        .read           = seq_read,
 613        .llseek         = seq_lseek,
 614        .release        = single_release,
 615        .write          = lcd_proc_write,
 616};
 617
 618static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status)
 619{
 620        u32 hci_result;
 621
 622        hci_read1(dev, HCI_VIDEO_OUT, status, &hci_result);
 623        return hci_result == HCI_SUCCESS ? 0 : -EIO;
 624}
 625
 626static int video_proc_show(struct seq_file *m, void *v)
 627{
 628        struct toshiba_acpi_dev *dev = m->private;
 629        u32 value;
 630        int ret;
 631
 632        ret = get_video_status(dev, &value);
 633        if (!ret) {
 634                int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
 635                int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
 636                int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
 637                seq_printf(m, "lcd_out:                 %d\n", is_lcd);
 638                seq_printf(m, "crt_out:                 %d\n", is_crt);
 639                seq_printf(m, "tv_out:                  %d\n", is_tv);
 640        }
 641
 642        return ret;
 643}
 644
 645static int video_proc_open(struct inode *inode, struct file *file)
 646{
 647        return single_open(file, video_proc_show, PDE(inode)->data);
 648}
 649
 650static ssize_t video_proc_write(struct file *file, const char __user *buf,
 651                                size_t count, loff_t *pos)
 652{
 653        struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
 654        char *cmd, *buffer;
 655        int ret;
 656        int value;
 657        int remain = count;
 658        int lcd_out = -1;
 659        int crt_out = -1;
 660        int tv_out = -1;
 661        u32 video_out;
 662
 663        cmd = kmalloc(count + 1, GFP_KERNEL);
 664        if (!cmd)
 665                return -ENOMEM;
 666        if (copy_from_user(cmd, buf, count)) {
 667                kfree(cmd);
 668                return -EFAULT;
 669        }
 670        cmd[count] = '\0';
 671
 672        buffer = cmd;
 673
 674        /* scan expression.  Multiple expressions may be delimited with ;
 675         *
 676         *  NOTE: to keep scanning simple, invalid fields are ignored
 677         */
 678        while (remain) {
 679                if (sscanf(buffer, " lcd_out : %i", &value) == 1)
 680                        lcd_out = value & 1;
 681                else if (sscanf(buffer, " crt_out : %i", &value) == 1)
 682                        crt_out = value & 1;
 683                else if (sscanf(buffer, " tv_out : %i", &value) == 1)
 684                        tv_out = value & 1;
 685                /* advance to one character past the next ; */
 686                do {
 687                        ++buffer;
 688                        --remain;
 689                }
 690                while (remain && *(buffer - 1) != ';');
 691        }
 692
 693        kfree(cmd);
 694
 695        ret = get_video_status(dev, &video_out);
 696        if (!ret) {
 697                unsigned int new_video_out = video_out;
 698                if (lcd_out != -1)
 699                        _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
 700                if (crt_out != -1)
 701                        _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
 702                if (tv_out != -1)
 703                        _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
 704                /* To avoid unnecessary video disruption, only write the new
 705                 * video setting if something changed. */
 706                if (new_video_out != video_out)
 707                        ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
 708        }
 709
 710        return ret ? ret : count;
 711}
 712
 713static const struct file_operations video_proc_fops = {
 714        .owner          = THIS_MODULE,
 715        .open           = video_proc_open,
 716        .read           = seq_read,
 717        .llseek         = seq_lseek,
 718        .release        = single_release,
 719        .write          = video_proc_write,
 720};
 721
 722static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status)
 723{
 724        u32 hci_result;
 725
 726        hci_read1(dev, HCI_FAN, status, &hci_result);
 727        return hci_result == HCI_SUCCESS ? 0 : -EIO;
 728}
 729
 730static int fan_proc_show(struct seq_file *m, void *v)
 731{
 732        struct toshiba_acpi_dev *dev = m->private;
 733        int ret;
 734        u32 value;
 735
 736        ret = get_fan_status(dev, &value);
 737        if (!ret) {
 738                seq_printf(m, "running:                 %d\n", (value > 0));
 739                seq_printf(m, "force_on:                %d\n", dev->force_fan);
 740        }
 741
 742        return ret;
 743}
 744
 745static int fan_proc_open(struct inode *inode, struct file *file)
 746{
 747        return single_open(file, fan_proc_show, PDE(inode)->data);
 748}
 749
 750static ssize_t fan_proc_write(struct file *file, const char __user *buf,
 751                              size_t count, loff_t *pos)
 752{
 753        struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
 754        char cmd[42];
 755        size_t len;
 756        int value;
 757        u32 hci_result;
 758
 759        len = min(count, sizeof(cmd) - 1);
 760        if (copy_from_user(cmd, buf, len))
 761                return -EFAULT;
 762        cmd[len] = '\0';
 763
 764        if (sscanf(cmd, " force_on : %i", &value) == 1 &&
 765            value >= 0 && value <= 1) {
 766                hci_write1(dev, HCI_FAN, value, &hci_result);
 767                if (hci_result != HCI_SUCCESS)
 768                        return -EIO;
 769                else
 770                        dev->force_fan = value;
 771        } else {
 772                return -EINVAL;
 773        }
 774
 775        return count;
 776}
 777
 778static const struct file_operations fan_proc_fops = {
 779        .owner          = THIS_MODULE,
 780        .open           = fan_proc_open,
 781        .read           = seq_read,
 782        .llseek         = seq_lseek,
 783        .release        = single_release,
 784        .write          = fan_proc_write,
 785};
 786
 787static int keys_proc_show(struct seq_file *m, void *v)
 788{
 789        struct toshiba_acpi_dev *dev = m->private;
 790        u32 hci_result;
 791        u32 value;
 792
 793        if (!dev->key_event_valid && dev->system_event_supported) {
 794                hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
 795                if (hci_result == HCI_SUCCESS) {
 796                        dev->key_event_valid = 1;
 797                        dev->last_key_event = value;
 798                } else if (hci_result == HCI_EMPTY) {
 799                        /* better luck next time */
 800                } else if (hci_result == HCI_NOT_SUPPORTED) {
 801                        /* This is a workaround for an unresolved issue on
 802                         * some machines where system events sporadically
 803                         * become disabled. */
 804                        hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
 805                        pr_notice("Re-enabled hotkeys\n");
 806                } else {
 807                        pr_err("Error reading hotkey status\n");
 808                        return -EIO;
 809                }
 810        }
 811
 812        seq_printf(m, "hotkey_ready:            %d\n", dev->key_event_valid);
 813        seq_printf(m, "hotkey:                  0x%04x\n", dev->last_key_event);
 814        return 0;
 815}
 816
 817static int keys_proc_open(struct inode *inode, struct file *file)
 818{
 819        return single_open(file, keys_proc_show, PDE(inode)->data);
 820}
 821
 822static ssize_t keys_proc_write(struct file *file, const char __user *buf,
 823                               size_t count, loff_t *pos)
 824{
 825        struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
 826        char cmd[42];
 827        size_t len;
 828        int value;
 829
 830        len = min(count, sizeof(cmd) - 1);
 831        if (copy_from_user(cmd, buf, len))
 832                return -EFAULT;
 833        cmd[len] = '\0';
 834
 835        if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
 836                dev->key_event_valid = 0;
 837        } else {
 838                return -EINVAL;
 839        }
 840
 841        return count;
 842}
 843
 844static const struct file_operations keys_proc_fops = {
 845        .owner          = THIS_MODULE,
 846        .open           = keys_proc_open,
 847        .read           = seq_read,
 848        .llseek         = seq_lseek,
 849        .release        = single_release,
 850        .write          = keys_proc_write,
 851};
 852
 853static int version_proc_show(struct seq_file *m, void *v)
 854{
 855        seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
 856        seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
 857        return 0;
 858}
 859
 860static int version_proc_open(struct inode *inode, struct file *file)
 861{
 862        return single_open(file, version_proc_show, PDE(inode)->data);
 863}
 864
 865static const struct file_operations version_proc_fops = {
 866        .owner          = THIS_MODULE,
 867        .open           = version_proc_open,
 868        .read           = seq_read,
 869        .llseek         = seq_lseek,
 870        .release        = single_release,
 871};
 872
 873/* proc and module init
 874 */
 875
 876#define PROC_TOSHIBA            "toshiba"
 877
 878static void create_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
 879{
 880        if (dev->backlight_dev)
 881                proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 882                                 &lcd_proc_fops, dev);
 883        if (dev->video_supported)
 884                proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 885                                 &video_proc_fops, dev);
 886        if (dev->fan_supported)
 887                proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 888                                 &fan_proc_fops, dev);
 889        if (dev->hotkey_dev)
 890                proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 891                                 &keys_proc_fops, dev);
 892        proc_create_data("version", S_IRUGO, toshiba_proc_dir,
 893                         &version_proc_fops, dev);
 894}
 895
 896static void remove_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
 897{
 898        if (dev->backlight_dev)
 899                remove_proc_entry("lcd", toshiba_proc_dir);
 900        if (dev->video_supported)
 901                remove_proc_entry("video", toshiba_proc_dir);
 902        if (dev->fan_supported)
 903                remove_proc_entry("fan", toshiba_proc_dir);
 904        if (dev->hotkey_dev)
 905                remove_proc_entry("keys", toshiba_proc_dir);
 906        remove_proc_entry("version", toshiba_proc_dir);
 907}
 908
 909static const struct backlight_ops toshiba_backlight_data = {
 910        .options = BL_CORE_SUSPENDRESUME,
 911        .get_brightness = get_lcd_brightness,
 912        .update_status  = set_lcd_status,
 913};
 914
 915static bool toshiba_acpi_i8042_filter(unsigned char data, unsigned char str,
 916                                      struct serio *port)
 917{
 918        if (str & 0x20)
 919                return false;
 920
 921        if (unlikely(data == 0xe0))
 922                return false;
 923
 924        if ((data & 0x7f) == TOS1900_FN_SCAN) {
 925                schedule_work(&toshiba_acpi->hotkey_work);
 926                return true;
 927        }
 928
 929        return false;
 930}
 931
 932static void toshiba_acpi_hotkey_work(struct work_struct *work)
 933{
 934        acpi_handle ec_handle = ec_get_handle();
 935        acpi_status status;
 936
 937        if (!ec_handle)
 938                return;
 939
 940        status = acpi_evaluate_object(ec_handle, "NTFY", NULL, NULL);
 941        if (ACPI_FAILURE(status))
 942                pr_err("ACPI NTFY method execution failed\n");
 943}
 944
 945/*
 946 * Returns hotkey scancode, or < 0 on failure.
 947 */
 948static int toshiba_acpi_query_hotkey(struct toshiba_acpi_dev *dev)
 949{
 950        struct acpi_buffer buf;
 951        union acpi_object out_obj;
 952        acpi_status status;
 953
 954        buf.pointer = &out_obj;
 955        buf.length = sizeof(out_obj);
 956
 957        status = acpi_evaluate_object(dev->acpi_dev->handle, "INFO",
 958                                      NULL, &buf);
 959        if (ACPI_FAILURE(status) || out_obj.type != ACPI_TYPE_INTEGER) {
 960                pr_err("ACPI INFO method execution failed\n");
 961                return -EIO;
 962        }
 963
 964        return out_obj.integer.value;
 965}
 966
 967static void toshiba_acpi_report_hotkey(struct toshiba_acpi_dev *dev,
 968                                       int scancode)
 969{
 970        if (scancode == 0x100)
 971                return;
 972
 973        /* act on key press; ignore key release */
 974        if (scancode & 0x80)
 975                return;
 976
 977        if (!sparse_keymap_report_event(dev->hotkey_dev, scancode, 1, true))
 978                pr_info("Unknown key %x\n", scancode);
 979}
 980
 981static int toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
 982{
 983        acpi_status status;
 984        acpi_handle ec_handle, handle;
 985        int error;
 986        u32 hci_result;
 987
 988        dev->hotkey_dev = input_allocate_device();
 989        if (!dev->hotkey_dev) {
 990                pr_info("Unable to register input device\n");
 991                return -ENOMEM;
 992        }
 993
 994        dev->hotkey_dev->name = "Toshiba input device";
 995        dev->hotkey_dev->phys = "toshiba_acpi/input0";
 996        dev->hotkey_dev->id.bustype = BUS_HOST;
 997
 998        error = sparse_keymap_setup(dev->hotkey_dev, toshiba_acpi_keymap, NULL);
 999        if (error)
1000                goto err_free_dev;
1001
1002        /*
1003         * For some machines the SCI responsible for providing hotkey
1004         * notification doesn't fire. We can trigger the notification
1005         * whenever the Fn key is pressed using the NTFY method, if
1006         * supported, so if it's present set up an i8042 key filter
1007         * for this purpose.
1008         */
1009        status = AE_ERROR;
1010        ec_handle = ec_get_handle();
1011        if (ec_handle)
1012                status = acpi_get_handle(ec_handle, "NTFY", &handle);
1013
1014        if (ACPI_SUCCESS(status)) {
1015                INIT_WORK(&dev->hotkey_work, toshiba_acpi_hotkey_work);
1016
1017                error = i8042_install_filter(toshiba_acpi_i8042_filter);
1018                if (error) {
1019                        pr_err("Error installing key filter\n");
1020                        goto err_free_keymap;
1021                }
1022
1023                dev->ntfy_supported = 1;
1024        }
1025
1026        /*
1027         * Determine hotkey query interface. Prefer using the INFO
1028         * method when it is available.
1029         */
1030        status = acpi_get_handle(dev->acpi_dev->handle, "INFO", &handle);
1031        if (ACPI_SUCCESS(status)) {
1032                dev->info_supported = 1;
1033        } else {
1034                hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
1035                if (hci_result == HCI_SUCCESS)
1036                        dev->system_event_supported = 1;
1037        }
1038
1039        if (!dev->info_supported && !dev->system_event_supported) {
1040                pr_warn("No hotkey query interface found\n");
1041                goto err_remove_filter;
1042        }
1043
1044        status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL);
1045        if (ACPI_FAILURE(status)) {
1046                pr_info("Unable to enable hotkeys\n");
1047                error = -ENODEV;
1048                goto err_remove_filter;
1049        }
1050
1051        error = input_register_device(dev->hotkey_dev);
1052        if (error) {
1053                pr_info("Unable to register input device\n");
1054                goto err_remove_filter;
1055        }
1056
1057        hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &hci_result);
1058        return 0;
1059
1060 err_remove_filter:
1061        if (dev->ntfy_supported)
1062                i8042_remove_filter(toshiba_acpi_i8042_filter);
1063 err_free_keymap:
1064        sparse_keymap_free(dev->hotkey_dev);
1065 err_free_dev:
1066        input_free_device(dev->hotkey_dev);
1067        dev->hotkey_dev = NULL;
1068        return error;
1069}
1070
1071static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev)
1072{
1073        struct backlight_properties props;
1074        int brightness;
1075        int ret;
1076        bool enabled;
1077
1078        /*
1079         * Some machines don't support the backlight methods at all, and
1080         * others support it read-only. Either of these is pretty useless,
1081         * so only register the backlight device if the backlight method
1082         * supports both reads and writes.
1083         */
1084        brightness = __get_lcd_brightness(dev);
1085        if (brightness < 0)
1086                return 0;
1087        ret = set_lcd_brightness(dev, brightness);
1088        if (ret) {
1089                pr_debug("Backlight method is read-only, disabling backlight support\n");
1090                return 0;
1091        }
1092
1093        /* Determine whether or not BIOS supports transflective backlight */
1094        ret = get_tr_backlight_status(dev, &enabled);
1095        dev->tr_backlight_supported = !ret;
1096
1097        memset(&props, 0, sizeof(props));
1098        props.type = BACKLIGHT_PLATFORM;
1099        props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
1100
1101        /* adding an extra level and having 0 change to transflective mode */
1102        if (dev->tr_backlight_supported)
1103                props.max_brightness++;
1104
1105        dev->backlight_dev = backlight_device_register("toshiba",
1106                                                       &dev->acpi_dev->dev,
1107                                                       dev,
1108                                                       &toshiba_backlight_data,
1109                                                       &props);
1110        if (IS_ERR(dev->backlight_dev)) {
1111                ret = PTR_ERR(dev->backlight_dev);
1112                pr_err("Could not register toshiba backlight device\n");
1113                dev->backlight_dev = NULL;
1114                return ret;
1115        }
1116
1117        dev->backlight_dev->props.brightness = brightness;
1118        return 0;
1119}
1120
1121static int toshiba_acpi_remove(struct acpi_device *acpi_dev, int type)
1122{
1123        struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1124
1125        remove_toshiba_proc_entries(dev);
1126
1127        if (dev->ntfy_supported) {
1128                i8042_remove_filter(toshiba_acpi_i8042_filter);
1129                cancel_work_sync(&dev->hotkey_work);
1130        }
1131
1132        if (dev->hotkey_dev) {
1133                input_unregister_device(dev->hotkey_dev);
1134                sparse_keymap_free(dev->hotkey_dev);
1135        }
1136
1137        if (dev->bt_rfk) {
1138                rfkill_unregister(dev->bt_rfk);
1139                rfkill_destroy(dev->bt_rfk);
1140        }
1141
1142        if (dev->backlight_dev)
1143                backlight_device_unregister(dev->backlight_dev);
1144
1145        if (dev->illumination_supported)
1146                led_classdev_unregister(&dev->led_dev);
1147
1148        if (toshiba_acpi)
1149                toshiba_acpi = NULL;
1150
1151        kfree(dev);
1152
1153        return 0;
1154}
1155
1156static const char *find_hci_method(acpi_handle handle)
1157{
1158        acpi_status status;
1159        acpi_handle hci_handle;
1160
1161        status = acpi_get_handle(handle, "GHCI", &hci_handle);
1162        if (ACPI_SUCCESS(status))
1163                return "GHCI";
1164
1165        status = acpi_get_handle(handle, "SPFC", &hci_handle);
1166        if (ACPI_SUCCESS(status))
1167                return "SPFC";
1168
1169        return NULL;
1170}
1171
1172static int toshiba_acpi_add(struct acpi_device *acpi_dev)
1173{
1174        struct toshiba_acpi_dev *dev;
1175        const char *hci_method;
1176        u32 dummy;
1177        bool bt_present;
1178        int ret = 0;
1179
1180        if (toshiba_acpi)
1181                return -EBUSY;
1182
1183        pr_info("Toshiba Laptop ACPI Extras version %s\n",
1184               TOSHIBA_ACPI_VERSION);
1185
1186        hci_method = find_hci_method(acpi_dev->handle);
1187        if (!hci_method) {
1188                pr_err("HCI interface not found\n");
1189                return -ENODEV;
1190        }
1191
1192        dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1193        if (!dev)
1194                return -ENOMEM;
1195        dev->acpi_dev = acpi_dev;
1196        dev->method_hci = hci_method;
1197        acpi_dev->driver_data = dev;
1198
1199        if (toshiba_acpi_setup_keyboard(dev))
1200                pr_info("Unable to activate hotkeys\n");
1201
1202        mutex_init(&dev->mutex);
1203
1204        ret = toshiba_acpi_setup_backlight(dev);
1205        if (ret)
1206                goto error;
1207
1208        /* Register rfkill switch for Bluetooth */
1209        if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) {
1210                dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth",
1211                                           &acpi_dev->dev,
1212                                           RFKILL_TYPE_BLUETOOTH,
1213                                           &toshiba_rfk_ops,
1214                                           dev);
1215                if (!dev->bt_rfk) {
1216                        pr_err("unable to allocate rfkill device\n");
1217                        ret = -ENOMEM;
1218                        goto error;
1219                }
1220
1221                ret = rfkill_register(dev->bt_rfk);
1222                if (ret) {
1223                        pr_err("unable to register rfkill device\n");
1224                        rfkill_destroy(dev->bt_rfk);
1225                        goto error;
1226                }
1227        }
1228
1229        if (toshiba_illumination_available(dev)) {
1230                dev->led_dev.name = "toshiba::illumination";
1231                dev->led_dev.max_brightness = 1;
1232                dev->led_dev.brightness_set = toshiba_illumination_set;
1233                dev->led_dev.brightness_get = toshiba_illumination_get;
1234                if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
1235                        dev->illumination_supported = 1;
1236        }
1237
1238        /* Determine whether or not BIOS supports fan and video interfaces */
1239
1240        ret = get_video_status(dev, &dummy);
1241        dev->video_supported = !ret;
1242
1243        ret = get_fan_status(dev, &dummy);
1244        dev->fan_supported = !ret;
1245
1246        create_toshiba_proc_entries(dev);
1247
1248        toshiba_acpi = dev;
1249
1250        return 0;
1251
1252error:
1253        toshiba_acpi_remove(acpi_dev, 0);
1254        return ret;
1255}
1256
1257static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event)
1258{
1259        struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
1260        u32 hci_result, value;
1261        int retries = 3;
1262        int scancode;
1263
1264        if (event != 0x80)
1265                return;
1266
1267        if (dev->info_supported) {
1268                scancode = toshiba_acpi_query_hotkey(dev);
1269                if (scancode < 0)
1270                        pr_err("Failed to query hotkey event\n");
1271                else if (scancode != 0)
1272                        toshiba_acpi_report_hotkey(dev, scancode);
1273        } else if (dev->system_event_supported) {
1274                do {
1275                        hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
1276                        switch (hci_result) {
1277                        case HCI_SUCCESS:
1278                                toshiba_acpi_report_hotkey(dev, (int)value);
1279                                break;
1280                        case HCI_NOT_SUPPORTED:
1281                                /*
1282                                 * This is a workaround for an unresolved
1283                                 * issue on some machines where system events
1284                                 * sporadically become disabled.
1285                                 */
1286                                hci_write1(dev, HCI_SYSTEM_EVENT, 1,
1287                                           &hci_result);
1288                                pr_notice("Re-enabled hotkeys\n");
1289                                /* fall through */
1290                        default:
1291                                retries--;
1292                                break;
1293                        }
1294                } while (retries && hci_result != HCI_EMPTY);
1295        }
1296}
1297
1298#ifdef CONFIG_PM_SLEEP
1299static int toshiba_acpi_suspend(struct device *device)
1300{
1301        struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
1302        u32 result;
1303
1304        if (dev->hotkey_dev)
1305                hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_DISABLE, &result);
1306
1307        return 0;
1308}
1309
1310static int toshiba_acpi_resume(struct device *device)
1311{
1312        struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
1313        u32 result;
1314
1315        if (dev->hotkey_dev)
1316                hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &result);
1317
1318        return 0;
1319}
1320#endif
1321
1322static SIMPLE_DEV_PM_OPS(toshiba_acpi_pm,
1323                         toshiba_acpi_suspend, toshiba_acpi_resume);
1324
1325static struct acpi_driver toshiba_acpi_driver = {
1326        .name   = "Toshiba ACPI driver",
1327        .owner  = THIS_MODULE,
1328        .ids    = toshiba_device_ids,
1329        .flags  = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1330        .ops    = {
1331                .add            = toshiba_acpi_add,
1332                .remove         = toshiba_acpi_remove,
1333                .notify         = toshiba_acpi_notify,
1334        },
1335        .drv.pm = &toshiba_acpi_pm,
1336};
1337
1338static int __init toshiba_acpi_init(void)
1339{
1340        int ret;
1341
1342        /*
1343         * Machines with this WMI guid aren't supported due to bugs in
1344         * their AML. This check relies on wmi initializing before
1345         * toshiba_acpi to guarantee guids have been identified.
1346         */
1347        if (wmi_has_guid(TOSHIBA_WMI_EVENT_GUID))
1348                return -ENODEV;
1349
1350        toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
1351        if (!toshiba_proc_dir) {
1352                pr_err("Unable to create proc dir " PROC_TOSHIBA "\n");
1353                return -ENODEV;
1354        }
1355
1356        ret = acpi_bus_register_driver(&toshiba_acpi_driver);
1357        if (ret) {
1358                pr_err("Failed to register ACPI driver: %d\n", ret);
1359                remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1360        }
1361
1362        return ret;
1363}
1364
1365static void __exit toshiba_acpi_exit(void)
1366{
1367        acpi_bus_unregister_driver(&toshiba_acpi_driver);
1368        if (toshiba_proc_dir)
1369                remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1370}
1371
1372module_init(toshiba_acpi_init);
1373module_exit(toshiba_acpi_exit);
1374