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
  56 #include <asm/uaccess.h>
  57
  58 #include <acpi/acpi_drivers.h>
  59
  60 MODULE_AUTHOR("John Belmonte");
  61 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
  62 MODULE_LICENSE("GPL");
  63
  64 /* Toshiba ACPI method paths */
  65 #define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
  66
  67 /* Toshiba HCI interface definitions
  68  *
  69  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
  70  * be uniform across all their models.  Ideally we would just call
  71  * dedicated ACPI methods instead of using this primitive interface.
  72  * However the ACPI methods seem to be incomplete in some areas (for
  73  * example they allow setting, but not reading, the LCD brightness value),
  74  * so this is still useful.
  75  */
  76
  77 #define HCI_WORDS                       6
  78
  79 /* operations */
  80 #define HCI_SET                         0xff00
  81 #define HCI_GET                         0xfe00
  82
  83 /* return codes */
  84 #define HCI_SUCCESS                     0x0000
  85 #define HCI_FAILURE                     0x1000
  86 #define HCI_NOT_SUPPORTED               0x8000
  87 #define HCI_EMPTY                       0x8c00
  88
  89 /* registers */
  90 #define HCI_FAN                         0x0004
  91 #define HCI_SYSTEM_EVENT                0x0016
  92 #define HCI_VIDEO_OUT                   0x001c
  93 #define HCI_HOTKEY_EVENT                0x001e
  94 #define HCI_LCD_BRIGHTNESS              0x002a
  95 #define HCI_WIRELESS                    0x0056
  96
  97 /* field definitions */
  98 #define HCI_LCD_BRIGHTNESS_BITS         3
  99 #define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
 100 #define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
 101 #define HCI_VIDEO_OUT_LCD               0x1
 102 #define HCI_VIDEO_OUT_CRT               0x2
 103 #define HCI_VIDEO_OUT_TV                0x4
 104 #define HCI_WIRELESS_KILL_SWITCH        0x01
 105 #define HCI_WIRELESS_BT_PRESENT         0x0f
 106 #define HCI_WIRELESS_BT_ATTACH          0x40
 107 #define HCI_WIRELESS_BT_POWER           0x80
 108
 109 struct toshiba_acpi_dev {
 110         struct acpi_device *acpi_dev;
 111         const char *method_hci;
 112         struct rfkill *bt_rfk;
 113         struct input_dev *hotkey_dev;
 114         struct backlight_device *backlight_dev;
 115         struct led_classdev led_dev;
 116         int illumination_installed;
 117         int force_fan;
 118         int last_key_event;
 119         int key_event_valid;
 120
 121         struct mutex mutex;
 122 };
 123
 124 static const struct acpi_device_id toshiba_device_ids[] = {
 125         {"TOS6200", 0},
 126         {"TOS6208", 0},
 127         {"TOS1900", 0},
 128         {"", 0},
 129 };
 130 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
 131
 132 static const struct key_entry toshiba_acpi_keymap[] __devinitconst = {
 133         { KE_KEY, 0x101, { KEY_MUTE } },
 134         { KE_KEY, 0x102, { KEY_ZOOMOUT } },
 135         { KE_KEY, 0x103, { KEY_ZOOMIN } },
 136         { KE_KEY, 0x13b, { KEY_COFFEE } },
 137         { KE_KEY, 0x13c, { KEY_BATTERY } },
 138         { KE_KEY, 0x13d, { KEY_SLEEP } },
 139         { KE_KEY, 0x13e, { KEY_SUSPEND } },
 140         { KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } },
 141         { KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } },
 142         { KE_KEY, 0x141, { KEY_BRIGHTNESSUP } },
 143         { KE_KEY, 0x142, { KEY_WLAN } },
 144         { KE_KEY, 0x143, { KEY_PROG1 } },
 145         { KE_KEY, 0x17f, { KEY_FN } },
 146         { KE_KEY, 0xb05, { KEY_PROG2 } },
 147         { KE_KEY, 0xb06, { KEY_WWW } },
 148         { KE_KEY, 0xb07, { KEY_MAIL } },
 149         { KE_KEY, 0xb30, { KEY_STOP } },
 150         { KE_KEY, 0xb31, { KEY_PREVIOUSSONG } },
 151         { KE_KEY, 0xb32, { KEY_NEXTSONG } },
 152         { KE_KEY, 0xb33, { KEY_PLAYPAUSE } },
 153         { KE_KEY, 0xb5a, { KEY_MEDIA } },
 154         { KE_END, 0 },
 155 };
 156
 157 /* utility
 158  */
 159
 160 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
 161 {
 162         *word = (*word & ~mask) | (mask * value);
 163 }
 164
 165 /* acpi interface wrappers
 166  */
 167
 168 static int write_acpi_int(const char *methodName, int val)
 169 {
 170         struct acpi_object_list params;
 171         union acpi_object in_objs[1];
 172         acpi_status status;
 173
 174         params.count = ARRAY_SIZE(in_objs);
 175         params.pointer = in_objs;
 176         in_objs[0].type = ACPI_TYPE_INTEGER;
 177         in_objs[0].integer.value = val;
 178
 179         status = acpi_evaluate_object(NULL, (char *)methodName, &params, NULL);
 180         return (status == AE_OK) ? 0 : -EIO;
 181 }
 182
 183 /* Perform a raw HCI call.  Here we don't care about input or output buffer
 184  * format.
 185  */
 186 static acpi_status hci_raw(struct toshiba_acpi_dev *dev,
 187                            const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
 188 {
 189         struct acpi_object_list params;
 190         union acpi_object in_objs[HCI_WORDS];
 191         struct acpi_buffer results;
 192         union acpi_object out_objs[HCI_WORDS + 1];
 193         acpi_status status;
 194         int i;
 195
 196         params.count = HCI_WORDS;
 197         params.pointer = in_objs;
 198         for (i = 0; i < HCI_WORDS; ++i) {
 199                 in_objs[i].type = ACPI_TYPE_INTEGER;
 200                 in_objs[i].integer.value = in[i];
 201         }
 202
 203         results.length = sizeof(out_objs);
 204         results.pointer = out_objs;
 205
 206         status = acpi_evaluate_object(dev->acpi_dev->handle,
 207                                       (char *)dev->method_hci, &params,
 208                                       &results);
 209         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
 210                 for (i = 0; i < out_objs->package.count; ++i) {
 211                         out[i] = out_objs->package.elements[i].integer.value;
 212                 }
 213         }
 214
 215         return status;
 216 }
 217
 218 /* common hci tasks (get or set one or two value)
 219  *
 220  * In addition to the ACPI status, the HCI system returns a result which
 221  * may be useful (such as "not supported").
 222  */
 223
 224 static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg,
 225                               u32 in1, u32 *result)
 226 {
 227         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
 228         u32 out[HCI_WORDS];
 229         acpi_status status = hci_raw(dev, in, out);
 230         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 231         return status;
 232 }
 233
 234 static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg,
 235                              u32 *out1, u32 *result)
 236 {
 237         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
 238         u32 out[HCI_WORDS];
 239         acpi_status status = hci_raw(dev, in, out);
 240         *out1 = out[2];
 241         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 242         return status;
 243 }
 244
 245 static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg,
 246                               u32 in1, u32 in2, u32 *result)
 247 {
 248         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
 249         u32 out[HCI_WORDS];
 250         acpi_status status = hci_raw(dev, in, out);
 251         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 252         return status;
 253 }
 254
 255 static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg,
 256                              u32 *out1, u32 *out2, u32 *result)
 257 {
 258         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
 259         u32 out[HCI_WORDS];
 260         acpi_status status = hci_raw(dev, in, out);
 261         *out1 = out[2];
 262         *out2 = out[3];
 263         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 264         return status;
 265 }
 266
 267 /* Illumination support */
 268 static int toshiba_illumination_available(struct toshiba_acpi_dev *dev)
 269 {
 270         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 271         u32 out[HCI_WORDS];
 272         acpi_status status;
 273
 274         in[0] = 0xf100;
 275         status = hci_raw(dev, in, out);
 276         if (ACPI_FAILURE(status)) {
 277                 pr_info("Illumination device not available\n");
 278                 return 0;
 279         }
 280         in[0] = 0xf400;
 281         status = hci_raw(dev, in, out);
 282         return 1;
 283 }
 284
 285 static void toshiba_illumination_set(struct led_classdev *cdev,
 286                                      enum led_brightness brightness)
 287 {
 288         struct toshiba_acpi_dev *dev = container_of(cdev,
 289                         struct toshiba_acpi_dev, led_dev);
 290         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 291         u32 out[HCI_WORDS];
 292         acpi_status status;
 293
 294         /* First request : initialize communication. */
 295         in[0] = 0xf100;
 296         status = hci_raw(dev, in, out);
 297         if (ACPI_FAILURE(status)) {
 298                 pr_info("Illumination device not available\n");
 299                 return;
 300         }
 301
 302         if (brightness) {
 303                 /* Switch the illumination on */
 304                 in[0] = 0xf400;
 305                 in[1] = 0x14e;
 306                 in[2] = 1;
 307                 status = hci_raw(dev, in, out);
 308                 if (ACPI_FAILURE(status)) {
 309                         pr_info("ACPI call for illumination failed\n");
 310                         return;
 311                 }
 312         } else {
 313                 /* Switch the illumination off */
 314                 in[0] = 0xf400;
 315                 in[1] = 0x14e;
 316                 in[2] = 0;
 317                 status = hci_raw(dev, in, out);
 318                 if (ACPI_FAILURE(status)) {
 319                         pr_info("ACPI call for illumination failed.\n");
 320                         return;
 321                 }
 322         }
 323
 324         /* Last request : close communication. */
 325         in[0] = 0xf200;
 326         in[1] = 0;
 327         in[2] = 0;
 328         hci_raw(dev, in, out);
 329 }
 330
 331 static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
 332 {
 333         struct toshiba_acpi_dev *dev = container_of(cdev,
 334                         struct toshiba_acpi_dev, led_dev);
 335         u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 };
 336         u32 out[HCI_WORDS];
 337         acpi_status status;
 338         enum led_brightness result;
 339
 340         /* First request : initialize communication. */
 341         in[0] = 0xf100;
 342         status = hci_raw(dev, in, out);
 343         if (ACPI_FAILURE(status)) {
 344                 pr_info("Illumination device not available\n");
 345                 return LED_OFF;
 346         }
 347
 348         /* Check the illumination */
 349         in[0] = 0xf300;
 350         in[1] = 0x14e;
 351         status = hci_raw(dev, in, out);
 352         if (ACPI_FAILURE(status)) {
 353                 pr_info("ACPI call for illumination failed.\n");
 354                 return LED_OFF;
 355         }
 356
 357         result = out[2] ? LED_FULL : LED_OFF;
 358
 359         /* Last request : close communication. */
 360         in[0] = 0xf200;
 361         in[1] = 0;
 362         in[2] = 0;
 363         hci_raw(dev, in, out);
 364
 365         return result;
 366 }
 367
 368 /* Bluetooth rfkill handlers */
 369
 370 static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)
 371 {
 372         u32 hci_result;
 373         u32 value, value2;
 374
 375         value = 0;
 376         value2 = 0;
 377         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
 378         if (hci_result == HCI_SUCCESS)
 379                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
 380
 381         return hci_result;
 382 }
 383
 384 static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state)
 385 {
 386         u32 hci_result;
 387         u32 value, value2;
 388
 389         value = 0;
 390         value2 = 0x0001;
 391         hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
 392
 393         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
 394         return hci_result;
 395 }
 396
 397 static int bt_rfkill_set_block(void *data, bool blocked)
 398 {
 399         struct toshiba_acpi_dev *dev = data;
 400         u32 result1, result2;
 401         u32 value;
 402         int err;
 403         bool radio_state;
 404
 405         value = (blocked == false);
 406
 407         mutex_lock(&dev->mutex);
 408         if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) {
 409                 err = -EIO;
 410                 goto out;
 411         }
 412
 413         if (!radio_state) {
 414                 err = 0;
 415                 goto out;
 416         }
 417
 418         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
 419         hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
 420
 421         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
 422                 err = -EIO;
 423         else
 424                 err = 0;
 425  out:
 426         mutex_unlock(&dev->mutex);
 427         return err;
 428 }
 429
 430 static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
 431 {
 432         bool new_rfk_state;
 433         bool value;
 434         u32 hci_result;
 435         struct toshiba_acpi_dev *dev = data;
 436
 437         mutex_lock(&dev->mutex);
 438
 439         hci_result = hci_get_radio_state(dev, &value);
 440         if (hci_result != HCI_SUCCESS) {
 441                 /* Can't do anything useful */
 442                 mutex_unlock(&dev->mutex);
 443                 return;
 444         }
 445
 446         new_rfk_state = value;
 447
 448         mutex_unlock(&dev->mutex);
 449
 450         if (rfkill_set_hw_state(rfkill, !new_rfk_state))
 451                 bt_rfkill_set_block(data, true);
 452 }
 453
 454 static const struct rfkill_ops toshiba_rfk_ops = {
 455         .set_block = bt_rfkill_set_block,
 456         .poll = bt_rfkill_poll,
 457 };
 458
 459 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
 460
 461 static int get_lcd(struct backlight_device *bd)
 462 {
 463         struct toshiba_acpi_dev *dev = bl_get_data(bd);
 464         u32 hci_result;
 465         u32 value;
 466
 467         hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result);
 468         if (hci_result == HCI_SUCCESS)
 469                 return (value >> HCI_LCD_BRIGHTNESS_SHIFT);
 470
 471         return -EIO;
 472 }
 473
 474 static int lcd_proc_show(struct seq_file *m, void *v)
 475 {
 476         struct toshiba_acpi_dev *dev = m->private;
 477         int value;
 478
 479         if (!dev->backlight_dev)
 480                 return -ENODEV;
 481
 482         value = get_lcd(dev->backlight_dev);
 483         if (value >= 0) {
 484                 seq_printf(m, "brightness:              %d\n", value);
 485                 seq_printf(m, "brightness_levels:       %d\n",
 486                              HCI_LCD_BRIGHTNESS_LEVELS);
 487                 return 0;
 488         }
 489
 490         pr_err("Error reading LCD brightness\n");
 491         return -EIO;
 492 }
 493
 494 static int lcd_proc_open(struct inode *inode, struct file *file)
 495 {
 496         return single_open(file, lcd_proc_show, PDE(inode)->data);
 497 }
 498
 499 static int set_lcd(struct toshiba_acpi_dev *dev, int value)
 500 {
 501         u32 hci_result;
 502
 503         value = value << HCI_LCD_BRIGHTNESS_SHIFT;
 504         hci_write1(dev, HCI_LCD_BRIGHTNESS, value, &hci_result);
 505         return hci_result == HCI_SUCCESS ? 0 : -EIO;
 506 }
 507
 508 static int set_lcd_status(struct backlight_device *bd)
 509 {
 510         struct toshiba_acpi_dev *dev = bl_get_data(bd);
 511         return set_lcd(dev, bd->props.brightness);
 512 }
 513
 514 static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
 515                               size_t count, loff_t *pos)
 516 {
 517         struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
 518         char cmd[42];
 519         size_t len;
 520         int value;
 521         int ret;
 522
 523         len = min(count, sizeof(cmd) - 1);
 524         if (copy_from_user(cmd, buf, len))
 525                 return -EFAULT;
 526         cmd[len] = '\0';
 527
 528         if (sscanf(cmd, " brightness : %i", &value) == 1 &&
 529             value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) {
 530                 ret = set_lcd(dev, value);
 531                 if (ret == 0)
 532                         ret = count;
 533         } else {
 534                 ret = -EINVAL;
 535         }
 536         return ret;
 537 }
 538
 539 static const struct file_operations lcd_proc_fops = {
 540         .owner          = THIS_MODULE,
 541         .open           = lcd_proc_open,
 542         .read           = seq_read,
 543         .llseek         = seq_lseek,
 544         .release        = single_release,
 545         .write          = lcd_proc_write,
 546 };
 547
 548 static int video_proc_show(struct seq_file *m, void *v)
 549 {
 550         struct toshiba_acpi_dev *dev = m->private;
 551         u32 hci_result;
 552         u32 value;
 553
 554         hci_read1(dev, HCI_VIDEO_OUT, &value, &hci_result);
 555         if (hci_result == HCI_SUCCESS) {
 556                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
 557                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
 558                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
 559                 seq_printf(m, "lcd_out:                 %d\n", is_lcd);
 560                 seq_printf(m, "crt_out:                 %d\n", is_crt);
 561                 seq_printf(m, "tv_out:                  %d\n", is_tv);
 562                 return 0;
 563         }
 564
 565         return -EIO;
 566 }
 567
 568 static int video_proc_open(struct inode *inode, struct file *file)
 569 {
 570         return single_open(file, video_proc_show, PDE(inode)->data);
 571 }
 572
 573 static ssize_t video_proc_write(struct file *file, const char __user *buf,
 574                                 size_t count, loff_t *pos)
 575 {
 576         struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
 577         char *cmd, *buffer;
 578         int ret = 0;
 579         int value;
 580         int remain = count;
 581         int lcd_out = -1;
 582         int crt_out = -1;
 583         int tv_out = -1;
 584         u32 hci_result;
 585         u32 video_out;
 586
 587         cmd = kmalloc(count + 1, GFP_KERNEL);
 588         if (!cmd)
 589                 return -ENOMEM;
 590         if (copy_from_user(cmd, buf, count)) {
 591                 kfree(cmd);
 592                 return -EFAULT;
 593         }
 594         cmd[count] = '\0';
 595
 596         buffer = cmd;
 597
 598         /* scan expression.  Multiple expressions may be delimited with ;
 599          *
 600          *  NOTE: to keep scanning simple, invalid fields are ignored
 601          */
 602         while (remain) {
 603                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
 604                         lcd_out = value & 1;
 605                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
 606                         crt_out = value & 1;
 607                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
 608                         tv_out = value & 1;
 609                 /* advance to one character past the next ; */
 610                 do {
 611                         ++buffer;
 612                         --remain;
 613                 }
 614                 while (remain && *(buffer - 1) != ';');
 615         }
 616
 617         kfree(cmd);
 618
 619         hci_read1(dev, HCI_VIDEO_OUT, &video_out, &hci_result);
 620         if (hci_result == HCI_SUCCESS) {
 621                 unsigned int new_video_out = video_out;
 622                 if (lcd_out != -1)
 623                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
 624                 if (crt_out != -1)
 625                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
 626                 if (tv_out != -1)
 627                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
 628                 /* To avoid unnecessary video disruption, only write the new
 629                  * video setting if something changed. */
 630                 if (new_video_out != video_out)
 631                         ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
 632         } else {
 633                 ret = -EIO;
 634         }
 635
 636         return ret ? ret : count;
 637 }
 638
 639 static const struct file_operations video_proc_fops = {
 640         .owner          = THIS_MODULE,
 641         .open           = video_proc_open,
 642         .read           = seq_read,
 643         .llseek         = seq_lseek,
 644         .release        = single_release,
 645         .write          = video_proc_write,
 646 };
 647
 648 static int fan_proc_show(struct seq_file *m, void *v)
 649 {
 650         struct toshiba_acpi_dev *dev = m->private;
 651         u32 hci_result;
 652         u32 value;
 653
 654         hci_read1(dev, HCI_FAN, &value, &hci_result);
 655         if (hci_result == HCI_SUCCESS) {
 656                 seq_printf(m, "running:                 %d\n", (value > 0));
 657                 seq_printf(m, "force_on:                %d\n", dev->force_fan);
 658                 return 0;
 659         }
 660
 661         return -EIO;
 662 }
 663
 664 static int fan_proc_open(struct inode *inode, struct file *file)
 665 {
 666         return single_open(file, fan_proc_show, PDE(inode)->data);
 667 }
 668
 669 static ssize_t fan_proc_write(struct file *file, const char __user *buf,
 670                               size_t count, loff_t *pos)
 671 {
 672         struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
 673         char cmd[42];
 674         size_t len;
 675         int value;
 676         u32 hci_result;
 677
 678         len = min(count, sizeof(cmd) - 1);
 679         if (copy_from_user(cmd, buf, len))
 680                 return -EFAULT;
 681         cmd[len] = '\0';
 682
 683         if (sscanf(cmd, " force_on : %i", &value) == 1 &&
 684             value >= 0 && value <= 1) {
 685                 hci_write1(dev, HCI_FAN, value, &hci_result);
 686                 if (hci_result != HCI_SUCCESS)
 687                         return -EIO;
 688                 else
 689                         dev->force_fan = value;
 690         } else {
 691                 return -EINVAL;
 692         }
 693
 694         return count;
 695 }
 696
 697 static const struct file_operations fan_proc_fops = {
 698         .owner          = THIS_MODULE,
 699         .open           = fan_proc_open,
 700         .read           = seq_read,
 701         .llseek         = seq_lseek,
 702         .release        = single_release,
 703         .write          = fan_proc_write,
 704 };
 705
 706 static int keys_proc_show(struct seq_file *m, void *v)
 707 {
 708         struct toshiba_acpi_dev *dev = m->private;
 709         u32 hci_result;
 710         u32 value;
 711
 712         if (!dev->key_event_valid) {
 713                 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
 714                 if (hci_result == HCI_SUCCESS) {
 715                         dev->key_event_valid = 1;
 716                         dev->last_key_event = value;
 717                 } else if (hci_result == HCI_EMPTY) {
 718                         /* better luck next time */
 719                 } else if (hci_result == HCI_NOT_SUPPORTED) {
 720                         /* This is a workaround for an unresolved issue on
 721                          * some machines where system events sporadically
 722                          * become disabled. */
 723                         hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
 724                         pr_notice("Re-enabled hotkeys\n");
 725                 } else {
 726                         pr_err("Error reading hotkey status\n");
 727                         return -EIO;
 728                 }
 729         }
 730
 731         seq_printf(m, "hotkey_ready:            %d\n", dev->key_event_valid);
 732         seq_printf(m, "hotkey:                  0x%04x\n", dev->last_key_event);
 733         return 0;
 734 }
 735
 736 static int keys_proc_open(struct inode *inode, struct file *file)
 737 {
 738         return single_open(file, keys_proc_show, PDE(inode)->data);
 739 }
 740
 741 static ssize_t keys_proc_write(struct file *file, const char __user *buf,
 742                                size_t count, loff_t *pos)
 743 {
 744         struct toshiba_acpi_dev *dev = PDE(file->f_path.dentry->d_inode)->data;
 745         char cmd[42];
 746         size_t len;
 747         int value;
 748
 749         len = min(count, sizeof(cmd) - 1);
 750         if (copy_from_user(cmd, buf, len))
 751                 return -EFAULT;
 752         cmd[len] = '\0';
 753
 754         if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
 755                 dev->key_event_valid = 0;
 756         } else {
 757                 return -EINVAL;
 758         }
 759
 760         return count;
 761 }
 762
 763 static const struct file_operations keys_proc_fops = {
 764         .owner          = THIS_MODULE,
 765         .open           = keys_proc_open,
 766         .read           = seq_read,
 767         .llseek         = seq_lseek,
 768         .release        = single_release,
 769         .write          = keys_proc_write,
 770 };
 771
 772 static int version_proc_show(struct seq_file *m, void *v)
 773 {
 774         seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
 775         seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
 776         return 0;
 777 }
 778
 779 static int version_proc_open(struct inode *inode, struct file *file)
 780 {
 781         return single_open(file, version_proc_show, PDE(inode)->data);
 782 }
 783
 784 static const struct file_operations version_proc_fops = {
 785         .owner          = THIS_MODULE,
 786         .open           = version_proc_open,
 787         .read           = seq_read,
 788         .llseek         = seq_lseek,
 789         .release        = single_release,
 790 };
 791
 792 /* proc and module init
 793  */
 794
 795 #define PROC_TOSHIBA            "toshiba"
 796
 797 static void __devinit
 798 create_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
 799 {
 800         proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 801                          &lcd_proc_fops, dev);
 802         proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 803                          &video_proc_fops, dev);
 804         proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 805                          &fan_proc_fops, dev);
 806         proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir,
 807                          &keys_proc_fops, dev);
 808         proc_create_data("version", S_IRUGO, toshiba_proc_dir,
 809                          &version_proc_fops, dev);
 810 }
 811
 812 static void remove_toshiba_proc_entries(void)
 813 {
 814         remove_proc_entry("lcd", toshiba_proc_dir);
 815         remove_proc_entry("video", toshiba_proc_dir);
 816         remove_proc_entry("fan", toshiba_proc_dir);
 817         remove_proc_entry("keys", toshiba_proc_dir);
 818         remove_proc_entry("version", toshiba_proc_dir);
 819 }
 820
 821 static const struct backlight_ops toshiba_backlight_data = {
 822         .get_brightness = get_lcd,
 823         .update_status  = set_lcd_status,
 824 };
 825
 826 static int __devinit toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
 827 {
 828         acpi_status status;
 829         int error;
 830
 831         dev->hotkey_dev = input_allocate_device();
 832         if (!dev->hotkey_dev) {
 833                 pr_info("Unable to register input device\n");
 834                 return -ENOMEM;
 835         }
 836
 837         dev->hotkey_dev->name = "Toshiba input device";
 838         dev->hotkey_dev->phys = "toshiba_acpi/input0";
 839         dev->hotkey_dev->id.bustype = BUS_HOST;
 840
 841         error = sparse_keymap_setup(dev->hotkey_dev, toshiba_acpi_keymap, NULL);
 842         if (error)
 843                 goto err_free_dev;
 844
 845         status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL);
 846         if (ACPI_FAILURE(status)) {
 847                 pr_info("Unable to enable hotkeys\n");
 848                 error = -ENODEV;
 849                 goto err_free_keymap;
 850         }
 851
 852         error = input_register_device(dev->hotkey_dev);
 853         if (error) {
 854                 pr_info("Unable to register input device\n");
 855                 goto err_free_keymap;
 856         }
 857
 858         return 0;
 859
 860  err_free_keymap:
 861         sparse_keymap_free(dev->hotkey_dev);
 862  err_free_dev:
 863         input_free_device(dev->hotkey_dev);
 864         dev->hotkey_dev = NULL;
 865         return error;
 866 }
 867
 868 static int toshiba_acpi_remove(struct acpi_device *acpi_dev, int type)
 869 {
 870         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
 871
 872         remove_toshiba_proc_entries();
 873
 874         if (dev->hotkey_dev) {
 875                 input_unregister_device(dev->hotkey_dev);
 876                 sparse_keymap_free(dev->hotkey_dev);
 877         }
 878
 879         if (dev->bt_rfk) {
 880                 rfkill_unregister(dev->bt_rfk);
 881                 rfkill_destroy(dev->bt_rfk);
 882         }
 883
 884         if (dev->backlight_dev)
 885                 backlight_device_unregister(dev->backlight_dev);
 886
 887         if (dev->illumination_installed)
 888                 led_classdev_unregister(&dev->led_dev);
 889
 890         kfree(dev);
 891
 892         return 0;
 893 }
 894
 895 static int __devinit toshiba_acpi_add(struct acpi_device *acpi_dev)
 896 {
 897         struct toshiba_acpi_dev *dev;
 898         acpi_status status;
 899         acpi_handle handle;
 900         u32 hci_result;
 901         bool bt_present;
 902         int ret = 0;
 903         struct backlight_properties props;
 904
 905         pr_info("Toshiba Laptop ACPI Extras version %s\n",
 906                TOSHIBA_ACPI_VERSION);
 907
 908         /* simple device detection: look for HCI method */
 909         status = acpi_get_handle(acpi_dev->handle, "GHCI", &handle);
 910         if (ACPI_FAILURE(status))
 911                 return -ENODEV;
 912
 913         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 914         if (!dev)
 915                 return -ENOMEM;
 916         dev->acpi_dev = acpi_dev;
 917         dev->method_hci = "GHCI";
 918         acpi_dev->driver_data = dev;
 919
 920         if (toshiba_acpi_setup_keyboard(dev))
 921                 pr_info("Unable to activate hotkeys\n");
 922
 923         mutex_init(&dev->mutex);
 924
 925         /* enable event fifo */
 926         hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
 927
 928         create_toshiba_proc_entries(dev);
 929
 930         props.type = BACKLIGHT_PLATFORM;
 931         props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
 932         dev->backlight_dev = backlight_device_register("toshiba",
 933                                                        &acpi_dev->dev,
 934                                                        dev,
 935                                                        &toshiba_backlight_data,
 936                                                        &props);
 937         if (IS_ERR(dev->backlight_dev)) {
 938                 ret = PTR_ERR(dev->backlight_dev);
 939
 940                 pr_err("Could not register toshiba backlight device\n");
 941                 dev->backlight_dev = NULL;
 942                 goto error;
 943         }
 944
 945         /* Register rfkill switch for Bluetooth */
 946         if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) {
 947                 dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth",
 948                                            &acpi_dev->dev,
 949                                            RFKILL_TYPE_BLUETOOTH,
 950                                            &toshiba_rfk_ops,
 951                                            dev);
 952                 if (!dev->bt_rfk) {
 953                         pr_err("unable to allocate rfkill device\n");
 954                         ret = -ENOMEM;
 955                         goto error;
 956                 }
 957
 958                 ret = rfkill_register(dev->bt_rfk);
 959                 if (ret) {
 960                         pr_err("unable to register rfkill device\n");
 961                         rfkill_destroy(dev->bt_rfk);
 962                         goto error;
 963                 }
 964         }
 965
 966         if (toshiba_illumination_available(dev)) {
 967                 dev->led_dev.name = "toshiba::illumination";
 968                 dev->led_dev.max_brightness = 1;
 969                 dev->led_dev.brightness_set = toshiba_illumination_set;
 970                 dev->led_dev.brightness_get = toshiba_illumination_get;
 971                 if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
 972                         dev->illumination_installed = 1;
 973         }
 974
 975         return 0;
 976
 977 error:
 978         toshiba_acpi_remove(acpi_dev, 0);
 979         return ret;
 980 }
 981
 982 static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event)
 983 {
 984         struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
 985         u32 hci_result, value;
 986
 987         if (event != 0x80)
 988                 return;
 989         do {
 990                 hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
 991                 if (hci_result == HCI_SUCCESS) {
 992                         if (value == 0x100)
 993                                 continue;
 994                         /* act on key press; ignore key release */
 995                         if (value & 0x80)
 996                                 continue;
 997
 998                         if (!sparse_keymap_report_event(dev->hotkey_dev,
 999                                                         value, 1, true)) {
1000                                 pr_info("Unknown key %x\n",
1001                                        value);
1002                         }
1003                 } else if (hci_result == HCI_NOT_SUPPORTED) {
1004                         /* This is a workaround for an unresolved issue on
1005                          * some machines where system events sporadically
1006                          * become disabled. */
1007                         hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
1008                         pr_notice("Re-enabled hotkeys\n");
1009                 }
1010         } while (hci_result != HCI_EMPTY);
1011 }
1012
1013
1014 static struct acpi_driver toshiba_acpi_driver = {
1015         .name   = "Toshiba ACPI driver",
1016         .owner  = THIS_MODULE,
1017         .ids    = toshiba_device_ids,
1018         .flags  = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1019         .ops    = {
1020                 .add            = toshiba_acpi_add,
1021                 .remove         = toshiba_acpi_remove,
1022                 .notify         = toshiba_acpi_notify,
1023         },
1024 };
1025
1026 static int __init toshiba_acpi_init(void)
1027 {
1028         int ret;
1029
1030         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
1031         if (!toshiba_proc_dir) {
1032                 pr_err("Unable to create proc dir " PROC_TOSHIBA "\n");
1033                 return -ENODEV;
1034         }
1035
1036         ret = acpi_bus_register_driver(&toshiba_acpi_driver);
1037         if (ret) {
1038                 pr_err("Failed to register ACPI driver: %d\n", ret);
1039                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1040         }
1041
1042         return ret;
1043 }
1044
1045 static void __exit toshiba_acpi_exit(void)
1046 {
1047         acpi_bus_unregister_driver(&toshiba_acpi_driver);
1048         if (toshiba_proc_dir)
1049                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
1050 }
1051
1052 module_init(toshiba_acpi_init);
1053 module_exit(toshiba_acpi_exit);