drivers/acpi/video.c

   1 /*
   2  *  video.c - ACPI Video Driver ($Revision:$)
   3  *
   4  *  Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
   5  *  Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
   6  *  Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
   7  *
   8  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or (at
  13  *  your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful, but
  16  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  *  General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along
  21  *  with this program; if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  23  *
  24  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/list.h>
  32 #include <linux/mutex.h>
  33 #include <linux/proc_fs.h>
  34 #include <linux/seq_file.h>
  35 #include <linux/input.h>
  36 #include <linux/backlight.h>
  37 #include <linux/thermal.h>
  38 #include <linux/video_output.h>
  39 #include <asm/uaccess.h>
  40
  41 #include <acpi/acpi_bus.h>
  42 #include <acpi/acpi_drivers.h>
  43
  44 #define ACPI_VIDEO_COMPONENT            0x08000000
  45 #define ACPI_VIDEO_CLASS                "video"
  46 #define ACPI_VIDEO_BUS_NAME             "Video Bus"
  47 #define ACPI_VIDEO_DEVICE_NAME          "Video Device"
  48 #define ACPI_VIDEO_NOTIFY_SWITCH        0x80
  49 #define ACPI_VIDEO_NOTIFY_PROBE         0x81
  50 #define ACPI_VIDEO_NOTIFY_CYCLE         0x82
  51 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT   0x83
  52 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT   0x84
  53
  54 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS      0x85
  55 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS        0x86
  56 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS        0x87
  57 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS       0x88
  58 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF           0x89
  59
  60 #define MAX_NAME_LEN    20
  61
  62 #define ACPI_VIDEO_DISPLAY_CRT  1
  63 #define ACPI_VIDEO_DISPLAY_TV   2
  64 #define ACPI_VIDEO_DISPLAY_DVI  3
  65 #define ACPI_VIDEO_DISPLAY_LCD  4
  66
  67 #define _COMPONENT              ACPI_VIDEO_COMPONENT
  68 ACPI_MODULE_NAME("video");
  69
  70 MODULE_AUTHOR("Bruno Ducrot");
  71 MODULE_DESCRIPTION("ACPI Video Driver");
  72 MODULE_LICENSE("GPL");
  73
  74 static int brightness_switch_enabled = 1;
  75 module_param(brightness_switch_enabled, bool, 0644);
  76
  77 static int acpi_video_bus_add(struct acpi_device *device);
  78 static int acpi_video_bus_remove(struct acpi_device *device, int type);
  79 static int acpi_video_resume(struct acpi_device *device);
  80
  81 static const struct acpi_device_id video_device_ids[] = {
  82         {ACPI_VIDEO_HID, 0},
  83         {"", 0},
  84 };
  85 MODULE_DEVICE_TABLE(acpi, video_device_ids);
  86
  87 static struct acpi_driver acpi_video_bus = {
  88         .name = "video",
  89         .class = ACPI_VIDEO_CLASS,
  90         .ids = video_device_ids,
  91         .ops = {
  92                 .add = acpi_video_bus_add,
  93                 .remove = acpi_video_bus_remove,
  94                 .resume = acpi_video_resume,
  95                 },
  96 };
  97
  98 struct acpi_video_bus_flags {
  99         u8 multihead:1;         /* can switch video heads */
 100         u8 rom:1;               /* can retrieve a video rom */
 101         u8 post:1;              /* can configure the head to */
 102         u8 reserved:5;
 103 };
 104
 105 struct acpi_video_bus_cap {
 106         u8 _DOS:1;              /*Enable/Disable output switching */
 107         u8 _DOD:1;              /*Enumerate all devices attached to display adapter */
 108         u8 _ROM:1;              /*Get ROM Data */
 109         u8 _GPD:1;              /*Get POST Device */
 110         u8 _SPD:1;              /*Set POST Device */
 111         u8 _VPO:1;              /*Video POST Options */
 112         u8 reserved:2;
 113 };
 114
 115 struct acpi_video_device_attrib {
 116         u32 display_index:4;    /* A zero-based instance of the Display */
 117         u32 display_port_attachment:4;  /*This field differentiates the display type */
 118         u32 display_type:4;     /*Describe the specific type in use */
 119         u32 vendor_specific:4;  /*Chipset Vendor Specific */
 120         u32 bios_can_detect:1;  /*BIOS can detect the device */
 121         u32 depend_on_vga:1;    /*Non-VGA output device whose power is related to
 122                                    the VGA device. */
 123         u32 pipe_id:3;          /*For VGA multiple-head devices. */
 124         u32 reserved:10;        /*Must be 0 */
 125         u32 device_id_scheme:1; /*Device ID Scheme */
 126 };
 127
 128 struct acpi_video_enumerated_device {
 129         union {
 130                 u32 int_val;
 131                 struct acpi_video_device_attrib attrib;
 132         } value;
 133         struct acpi_video_device *bind_info;
 134 };
 135
 136 struct acpi_video_bus {
 137         struct acpi_device *device;
 138         u8 dos_setting;
 139         struct acpi_video_enumerated_device *attached_array;
 140         u8 attached_count;
 141         struct acpi_video_bus_cap cap;
 142         struct acpi_video_bus_flags flags;
 143         struct list_head video_device_list;
 144         struct mutex device_list_lock;  /* protects video_device_list */
 145         struct proc_dir_entry *dir;
 146         struct input_dev *input;
 147         char phys[32];  /* for input device */
 148 };
 149
 150 struct acpi_video_device_flags {
 151         u8 crt:1;
 152         u8 lcd:1;
 153         u8 tvout:1;
 154         u8 dvi:1;
 155         u8 bios:1;
 156         u8 unknown:1;
 157         u8 reserved:2;
 158 };
 159
 160 struct acpi_video_device_cap {
 161         u8 _ADR:1;              /*Return the unique ID */
 162         u8 _BCL:1;              /*Query list of brightness control levels supported */
 163         u8 _BCM:1;              /*Set the brightness level */
 164         u8 _BQC:1;              /* Get current brightness level */
 165         u8 _DDC:1;              /*Return the EDID for this device */
 166         u8 _DCS:1;              /*Return status of output device */
 167         u8 _DGS:1;              /*Query graphics state */
 168         u8 _DSS:1;              /*Device state set */
 169 };
 170
 171 struct acpi_video_device_brightness {
 172         int curr;
 173         int count;
 174         int *levels;
 175 };
 176
 177 struct acpi_video_device {
 178         unsigned long device_id;
 179         struct acpi_video_device_flags flags;
 180         struct acpi_video_device_cap cap;
 181         struct list_head entry;
 182         struct acpi_video_bus *video;
 183         struct acpi_device *dev;
 184         struct acpi_video_device_brightness *brightness;
 185         struct backlight_device *backlight;
 186         struct thermal_cooling_device *cdev;
 187         struct output_device *output_dev;
 188 };
 189
 190 /* bus */
 191 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
 192 static struct file_operations acpi_video_bus_info_fops = {
 193         .open = acpi_video_bus_info_open_fs,
 194         .read = seq_read,
 195         .llseek = seq_lseek,
 196         .release = single_release,
 197 };
 198
 199 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
 200 static struct file_operations acpi_video_bus_ROM_fops = {
 201         .open = acpi_video_bus_ROM_open_fs,
 202         .read = seq_read,
 203         .llseek = seq_lseek,
 204         .release = single_release,
 205 };
 206
 207 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
 208                                             struct file *file);
 209 static struct file_operations acpi_video_bus_POST_info_fops = {
 210         .open = acpi_video_bus_POST_info_open_fs,
 211         .read = seq_read,
 212         .llseek = seq_lseek,
 213         .release = single_release,
 214 };
 215
 216 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
 217 static struct file_operations acpi_video_bus_POST_fops = {
 218         .open = acpi_video_bus_POST_open_fs,
 219         .read = seq_read,
 220         .llseek = seq_lseek,
 221         .release = single_release,
 222 };
 223
 224 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
 225 static struct file_operations acpi_video_bus_DOS_fops = {
 226         .open = acpi_video_bus_DOS_open_fs,
 227         .read = seq_read,
 228         .llseek = seq_lseek,
 229         .release = single_release,
 230 };
 231
 232 /* device */
 233 static int acpi_video_device_info_open_fs(struct inode *inode,
 234                                           struct file *file);
 235 static struct file_operations acpi_video_device_info_fops = {
 236         .open = acpi_video_device_info_open_fs,
 237         .read = seq_read,
 238         .llseek = seq_lseek,
 239         .release = single_release,
 240 };
 241
 242 static int acpi_video_device_state_open_fs(struct inode *inode,
 243                                            struct file *file);
 244 static struct file_operations acpi_video_device_state_fops = {
 245         .open = acpi_video_device_state_open_fs,
 246         .read = seq_read,
 247         .llseek = seq_lseek,
 248         .release = single_release,
 249 };
 250
 251 static int acpi_video_device_brightness_open_fs(struct inode *inode,
 252                                                 struct file *file);
 253 static struct file_operations acpi_video_device_brightness_fops = {
 254         .open = acpi_video_device_brightness_open_fs,
 255         .read = seq_read,
 256         .llseek = seq_lseek,
 257         .release = single_release,
 258 };
 259
 260 static int acpi_video_device_EDID_open_fs(struct inode *inode,
 261                                           struct file *file);
 262 static struct file_operations acpi_video_device_EDID_fops = {
 263         .open = acpi_video_device_EDID_open_fs,
 264         .read = seq_read,
 265         .llseek = seq_lseek,
 266         .release = single_release,
 267 };
 268
 269 static char device_decode[][30] = {
 270         "motherboard VGA device",
 271         "PCI VGA device",
 272         "AGP VGA device",
 273         "UNKNOWN",
 274 };
 275
 276 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
 277 static void acpi_video_device_rebind(struct acpi_video_bus *video);
 278 static void acpi_video_device_bind(struct acpi_video_bus *video,
 279                                    struct acpi_video_device *device);
 280 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
 281 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
 282                         int level);
 283 static int acpi_video_device_lcd_get_level_current(
 284                         struct acpi_video_device *device,
 285                         unsigned long *level);
 286 static int acpi_video_get_next_level(struct acpi_video_device *device,
 287                                      u32 level_current, u32 event);
 288 static void acpi_video_switch_brightness(struct acpi_video_device *device,
 289                                          int event);
 290 static int acpi_video_device_get_state(struct acpi_video_device *device,
 291                             unsigned long *state);
 292 static int acpi_video_output_get(struct output_device *od);
 293 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
 294
 295 /*backlight device sysfs support*/
 296 static int acpi_video_get_brightness(struct backlight_device *bd)
 297 {
 298         unsigned long cur_level;
 299         int i;
 300         struct acpi_video_device *vd =
 301                 (struct acpi_video_device *)bl_get_data(bd);
 302         acpi_video_device_lcd_get_level_current(vd, &cur_level);
 303         for (i = 2; i < vd->brightness->count; i++) {
 304                 if (vd->brightness->levels[i] == cur_level)
 305                         /* The first two entries are special - see page 575
 306                            of the ACPI spec 3.0 */
 307                         return i-2;
 308         }
 309         return 0;
 310 }
 311
 312 static int acpi_video_set_brightness(struct backlight_device *bd)
 313 {
 314         int request_level = bd->props.brightness+2;
 315         struct acpi_video_device *vd =
 316                 (struct acpi_video_device *)bl_get_data(bd);
 317         acpi_video_device_lcd_set_level(vd,
 318                                         vd->brightness->levels[request_level]);
 319         return 0;
 320 }
 321
 322 static struct backlight_ops acpi_backlight_ops = {
 323         .get_brightness = acpi_video_get_brightness,
 324         .update_status  = acpi_video_set_brightness,
 325 };
 326
 327 /*video output device sysfs support*/
 328 static int acpi_video_output_get(struct output_device *od)
 329 {
 330         unsigned long state;
 331         struct acpi_video_device *vd =
 332                 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
 333         acpi_video_device_get_state(vd, &state);
 334         return (int)state;
 335 }
 336
 337 static int acpi_video_output_set(struct output_device *od)
 338 {
 339         unsigned long state = od->request_state;
 340         struct acpi_video_device *vd=
 341                 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
 342         return acpi_video_device_set_state(vd, state);
 343 }
 344
 345 static struct output_properties acpi_output_properties = {
 346         .set_state = acpi_video_output_set,
 347         .get_status = acpi_video_output_get,
 348 };
 349
 350
 351 /* thermal cooling device callbacks */
 352 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
 353 {
 354         struct acpi_device *device = cdev->devdata;
 355         struct acpi_video_device *video = acpi_driver_data(device);
 356
 357         return sprintf(buf, "%d\n", video->brightness->count - 3);
 358 }
 359
 360 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
 361 {
 362         struct acpi_device *device = cdev->devdata;
 363         struct acpi_video_device *video = acpi_driver_data(device);
 364         unsigned long level;
 365         int state;
 366
 367         acpi_video_device_lcd_get_level_current(video, &level);
 368         for (state = 2; state < video->brightness->count; state++)
 369                 if (level == video->brightness->levels[state])
 370                         return sprintf(buf, "%d\n",
 371                                        video->brightness->count - state - 1);
 372
 373         return -EINVAL;
 374 }
 375
 376 static int
 377 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
 378 {
 379         struct acpi_device *device = cdev->devdata;
 380         struct acpi_video_device *video = acpi_driver_data(device);
 381         int level;
 382
 383         if ( state >= video->brightness->count - 2)
 384                 return -EINVAL;
 385
 386         state = video->brightness->count - state;
 387         level = video->brightness->levels[state -1];
 388         return acpi_video_device_lcd_set_level(video, level);
 389 }
 390
 391 static struct thermal_cooling_device_ops video_cooling_ops = {
 392         .get_max_state = video_get_max_state,
 393         .get_cur_state = video_get_cur_state,
 394         .set_cur_state = video_set_cur_state,
 395 };
 396
 397 /* --------------------------------------------------------------------------
 398                                Video Management
 399    -------------------------------------------------------------------------- */
 400
 401 /* device */
 402
 403 static int
 404 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
 405 {
 406         int status;
 407
 408         status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
 409
 410         return status;
 411 }
 412
 413 static int
 414 acpi_video_device_get_state(struct acpi_video_device *device,
 415                             unsigned long *state)
 416 {
 417         int status;
 418
 419         status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
 420
 421         return status;
 422 }
 423
 424 static int
 425 acpi_video_device_set_state(struct acpi_video_device *device, int state)
 426 {
 427         int status;
 428         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 429         struct acpi_object_list args = { 1, &arg0 };
 430         unsigned long ret;
 431
 432
 433         arg0.integer.value = state;
 434         status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
 435
 436         return status;
 437 }
 438
 439 static int
 440 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
 441                                    union acpi_object **levels)
 442 {
 443         int status;
 444         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 445         union acpi_object *obj;
 446
 447
 448         *levels = NULL;
 449
 450         status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
 451         if (!ACPI_SUCCESS(status))
 452                 return status;
 453         obj = (union acpi_object *)buffer.pointer;
 454         if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 455                 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
 456                 status = -EFAULT;
 457                 goto err;
 458         }
 459
 460         *levels = obj;
 461
 462         return 0;
 463
 464       err:
 465         kfree(buffer.pointer);
 466
 467         return status;
 468 }
 469
 470 static int
 471 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
 472 {
 473         int status = AE_OK;
 474         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 475         struct acpi_object_list args = { 1, &arg0 };
 476
 477
 478         arg0.integer.value = level;
 479
 480         if (device->cap._BCM)
 481                 status = acpi_evaluate_object(device->dev->handle, "_BCM",
 482                                               &args, NULL);
 483         device->brightness->curr = level;
 484         return status;
 485 }
 486
 487 static int
 488 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
 489                                         unsigned long *level)
 490 {
 491         if (device->cap._BQC)
 492                 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
 493                                              level);
 494         *level = device->brightness->curr;
 495         return AE_OK;
 496 }
 497
 498 static int
 499 acpi_video_device_EDID(struct acpi_video_device *device,
 500                        union acpi_object **edid, ssize_t length)
 501 {
 502         int status;
 503         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 504         union acpi_object *obj;
 505         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 506         struct acpi_object_list args = { 1, &arg0 };
 507
 508
 509         *edid = NULL;
 510
 511         if (!device)
 512                 return -ENODEV;
 513         if (length == 128)
 514                 arg0.integer.value = 1;
 515         else if (length == 256)
 516                 arg0.integer.value = 2;
 517         else
 518                 return -EINVAL;
 519
 520         status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
 521         if (ACPI_FAILURE(status))
 522                 return -ENODEV;
 523
 524         obj = buffer.pointer;
 525
 526         if (obj && obj->type == ACPI_TYPE_BUFFER)
 527                 *edid = obj;
 528         else {
 529                 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
 530                 status = -EFAULT;
 531                 kfree(obj);
 532         }
 533
 534         return status;
 535 }
 536
 537 /* bus */
 538
 539 static int
 540 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
 541 {
 542         int status;
 543         unsigned long tmp;
 544         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 545         struct acpi_object_list args = { 1, &arg0 };
 546
 547
 548         arg0.integer.value = option;
 549
 550         status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
 551         if (ACPI_SUCCESS(status))
 552                 status = tmp ? (-EINVAL) : (AE_OK);
 553
 554         return status;
 555 }
 556
 557 static int
 558 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
 559 {
 560         int status;
 561
 562         status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
 563
 564         return status;
 565 }
 566
 567 static int
 568 acpi_video_bus_POST_options(struct acpi_video_bus *video,
 569                             unsigned long *options)
 570 {
 571         int status;
 572
 573         status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
 574         *options &= 3;
 575
 576         return status;
 577 }
 578
 579 /*
 580  *  Arg:
 581  *      video           : video bus device pointer
 582  *      bios_flag       :
 583  *              0.      The system BIOS should NOT automatically switch(toggle)
 584  *                      the active display output.
 585  *              1.      The system BIOS should automatically switch (toggle) the
 586  *                      active display output. No switch event.
 587  *              2.      The _DGS value should be locked.
 588  *              3.      The system BIOS should not automatically switch (toggle) the
 589  *                      active display output, but instead generate the display switch
 590  *                      event notify code.
 591  *      lcd_flag        :
 592  *              0.      The system BIOS should automatically control the brightness level
 593  *                      of the LCD when the power changes from AC to DC
 594  *              1.      The system BIOS should NOT automatically control the brightness
 595  *                      level of the LCD when the power changes from AC to DC.
 596  * Return Value:
 597  *              -1      wrong arg.
 598  */
 599
 600 static int
 601 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
 602 {
 603         acpi_integer status = 0;
 604         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 605         struct acpi_object_list args = { 1, &arg0 };
 606
 607
 608         if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
 609                 status = -1;
 610                 goto Failed;
 611         }
 612         arg0.integer.value = (lcd_flag << 2) | bios_flag;
 613         video->dos_setting = arg0.integer.value;
 614         acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
 615
 616       Failed:
 617         return status;
 618 }
 619
 620 /*
 621  *  Arg:
 622  *      device  : video output device (LCD, CRT, ..)
 623  *
 624  *  Return Value:
 625  *      None
 626  *
 627  *  Find out all required AML methods defined under the output
 628  *  device.
 629  */
 630
 631 static void acpi_video_device_find_cap(struct acpi_video_device *device)
 632 {
 633         acpi_handle h_dummy1;
 634         int i;
 635         u32 max_level = 0;
 636         union acpi_object *obj = NULL;
 637         struct acpi_video_device_brightness *br = NULL;
 638
 639
 640         memset(&device->cap, 0, sizeof(device->cap));
 641
 642         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
 643                 device->cap._ADR = 1;
 644         }
 645         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
 646                 device->cap._BCL = 1;
 647         }
 648         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
 649                 device->cap._BCM = 1;
 650         }
 651         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
 652                 device->cap._BQC = 1;
 653         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
 654                 device->cap._DDC = 1;
 655         }
 656         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
 657                 device->cap._DCS = 1;
 658         }
 659         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
 660                 device->cap._DGS = 1;
 661         }
 662         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
 663                 device->cap._DSS = 1;
 664         }
 665
 666         if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
 667
 668                 if (obj->package.count >= 2) {
 669                         int count = 0;
 670                         union acpi_object *o;
 671
 672                         br = kzalloc(sizeof(*br), GFP_KERNEL);
 673                         if (!br) {
 674                                 printk(KERN_ERR "can't allocate memory\n");
 675                         } else {
 676                                 br->levels = kmalloc(obj->package.count *
 677                                                      sizeof *(br->levels), GFP_KERNEL);
 678                                 if (!br->levels)
 679                                         goto out;
 680
 681                                 for (i = 0; i < obj->package.count; i++) {
 682                                         o = (union acpi_object *)&obj->package.
 683                                             elements[i];
 684                                         if (o->type != ACPI_TYPE_INTEGER) {
 685                                                 printk(KERN_ERR PREFIX "Invalid data\n");
 686                                                 continue;
 687                                         }
 688                                         br->levels[count] = (u32) o->integer.value;
 689
 690                                         if (br->levels[count] > max_level)
 691                                                 max_level = br->levels[count];
 692                                         count++;
 693                                 }
 694                               out:
 695                                 if (count < 2) {
 696                                         kfree(br->levels);
 697                                         kfree(br);
 698                                 } else {
 699                                         br->count = count;
 700                                         device->brightness = br;
 701                                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 702                                                           "found %d brightness levels\n",
 703                                                           count));
 704                                 }
 705                         }
 706                 }
 707
 708         } else {
 709                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
 710         }
 711
 712         kfree(obj);
 713
 714         if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
 715                 int result;
 716                 static int count = 0;
 717                 char *name;
 718                 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
 719                 if (!name)
 720                         return;
 721
 722                 sprintf(name, "acpi_video%d", count++);
 723                 device->backlight = backlight_device_register(name,
 724                         NULL, device, &acpi_backlight_ops);
 725                 device->backlight->props.max_brightness = device->brightness->count-3;
 726                 device->backlight->props.brightness = acpi_video_get_brightness(device->backlight);
 727                 backlight_update_status(device->backlight);
 728                 kfree(name);
 729
 730                 device->cdev = thermal_cooling_device_register("LCD",
 731                                         device->dev, &video_cooling_ops);
 732                 if (IS_ERR(device->cdev))
 733                         return;
 734
 735                 printk(KERN_INFO PREFIX
 736                         "%s is registered as cooling_device%d\n",
 737                         device->dev->dev.bus_id, device->cdev->id);
 738                 result = sysfs_create_link(&device->dev->dev.kobj,
 739                                 &device->cdev->device.kobj,
 740                                 "thermal_cooling");
 741                 if (result)
 742                         printk(KERN_ERR PREFIX "Create sysfs link\n");
 743                 result = sysfs_create_link(&device->cdev->device.kobj,
 744                                 &device->dev->dev.kobj, "device");
 745                 if (result)
 746                         printk(KERN_ERR PREFIX "Create sysfs link\n");
 747
 748         }
 749         if (device->cap._DCS && device->cap._DSS){
 750                 static int count = 0;
 751                 char *name;
 752                 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
 753                 if (!name)
 754                         return;
 755                 sprintf(name, "acpi_video%d", count++);
 756                 device->output_dev = video_output_register(name,
 757                                 NULL, device, &acpi_output_properties);
 758                 kfree(name);
 759         }
 760         return;
 761 }
 762
 763 /*
 764  *  Arg:
 765  *      device  : video output device (VGA)
 766  *
 767  *  Return Value:
 768  *      None
 769  *
 770  *  Find out all required AML methods defined under the video bus device.
 771  */
 772
 773 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
 774 {
 775         acpi_handle h_dummy1;
 776
 777         memset(&video->cap, 0, sizeof(video->cap));
 778         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
 779                 video->cap._DOS = 1;
 780         }
 781         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
 782                 video->cap._DOD = 1;
 783         }
 784         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
 785                 video->cap._ROM = 1;
 786         }
 787         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
 788                 video->cap._GPD = 1;
 789         }
 790         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
 791                 video->cap._SPD = 1;
 792         }
 793         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
 794                 video->cap._VPO = 1;
 795         }
 796 }
 797
 798 /*
 799  * Check whether the video bus device has required AML method to
 800  * support the desired features
 801  */
 802
 803 static int acpi_video_bus_check(struct acpi_video_bus *video)
 804 {
 805         acpi_status status = -ENOENT;
 806
 807
 808         if (!video)
 809                 return -EINVAL;
 810
 811         /* Since there is no HID, CID and so on for VGA driver, we have
 812          * to check well known required nodes.
 813          */
 814
 815         /* Does this device support video switching? */
 816         if (video->cap._DOS) {
 817                 video->flags.multihead = 1;
 818                 status = 0;
 819         }
 820
 821         /* Does this device support retrieving a video ROM? */
 822         if (video->cap._ROM) {
 823                 video->flags.rom = 1;
 824                 status = 0;
 825         }
 826
 827         /* Does this device support configuring which video device to POST? */
 828         if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
 829                 video->flags.post = 1;
 830                 status = 0;
 831         }
 832
 833         return status;
 834 }
 835
 836 /* --------------------------------------------------------------------------
 837                               FS Interface (/proc)
 838    -------------------------------------------------------------------------- */
 839
 840 static struct proc_dir_entry *acpi_video_dir;
 841
 842 /* video devices */
 843
 844 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
 845 {
 846         struct acpi_video_device *dev = seq->private;
 847
 848
 849         if (!dev)
 850                 goto end;
 851
 852         seq_printf(seq, "device_id:    0x%04x\n", (u32) dev->device_id);
 853         seq_printf(seq, "type:         ");
 854         if (dev->flags.crt)
 855                 seq_printf(seq, "CRT\n");
 856         else if (dev->flags.lcd)
 857                 seq_printf(seq, "LCD\n");
 858         else if (dev->flags.tvout)
 859                 seq_printf(seq, "TVOUT\n");
 860         else if (dev->flags.dvi)
 861                 seq_printf(seq, "DVI\n");
 862         else
 863                 seq_printf(seq, "UNKNOWN\n");
 864
 865         seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
 866
 867       end:
 868         return 0;
 869 }
 870
 871 static int
 872 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
 873 {
 874         return single_open(file, acpi_video_device_info_seq_show,
 875                            PDE(inode)->data);
 876 }
 877
 878 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
 879 {
 880         int status;
 881         struct acpi_video_device *dev = seq->private;
 882         unsigned long state;
 883
 884
 885         if (!dev)
 886                 goto end;
 887
 888         status = acpi_video_device_get_state(dev, &state);
 889         seq_printf(seq, "state:     ");
 890         if (ACPI_SUCCESS(status))
 891                 seq_printf(seq, "0x%02lx\n", state);
 892         else
 893                 seq_printf(seq, "<not supported>\n");
 894
 895         status = acpi_video_device_query(dev, &state);
 896         seq_printf(seq, "query:     ");
 897         if (ACPI_SUCCESS(status))
 898                 seq_printf(seq, "0x%02lx\n", state);
 899         else
 900                 seq_printf(seq, "<not supported>\n");
 901
 902       end:
 903         return 0;
 904 }
 905
 906 static int
 907 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
 908 {
 909         return single_open(file, acpi_video_device_state_seq_show,
 910                            PDE(inode)->data);
 911 }
 912
 913 static ssize_t
 914 acpi_video_device_write_state(struct file *file,
 915                               const char __user * buffer,
 916                               size_t count, loff_t * data)
 917 {
 918         int status;
 919         struct seq_file *m = file->private_data;
 920         struct acpi_video_device *dev = m->private;
 921         char str[12] = { 0 };
 922         u32 state = 0;
 923
 924
 925         if (!dev || count + 1 > sizeof str)
 926                 return -EINVAL;
 927
 928         if (copy_from_user(str, buffer, count))
 929                 return -EFAULT;
 930
 931         str[count] = 0;
 932         state = simple_strtoul(str, NULL, 0);
 933         state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
 934
 935         status = acpi_video_device_set_state(dev, state);
 936
 937         if (status)
 938                 return -EFAULT;
 939
 940         return count;
 941 }
 942
 943 static int
 944 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
 945 {
 946         struct acpi_video_device *dev = seq->private;
 947         int i;
 948
 949
 950         if (!dev || !dev->brightness) {
 951                 seq_printf(seq, "<not supported>\n");
 952                 return 0;
 953         }
 954
 955         seq_printf(seq, "levels: ");
 956         for (i = 0; i < dev->brightness->count; i++)
 957                 seq_printf(seq, " %d", dev->brightness->levels[i]);
 958         seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
 959
 960         return 0;
 961 }
 962
 963 static int
 964 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
 965 {
 966         return single_open(file, acpi_video_device_brightness_seq_show,
 967                            PDE(inode)->data);
 968 }
 969
 970 static ssize_t
 971 acpi_video_device_write_brightness(struct file *file,
 972                                    const char __user * buffer,
 973                                    size_t count, loff_t * data)
 974 {
 975         struct seq_file *m = file->private_data;
 976         struct acpi_video_device *dev = m->private;
 977         char str[5] = { 0 };
 978         unsigned int level = 0;
 979         int i;
 980
 981
 982         if (!dev || !dev->brightness || count + 1 > sizeof str)
 983                 return -EINVAL;
 984
 985         if (copy_from_user(str, buffer, count))
 986                 return -EFAULT;
 987
 988         str[count] = 0;
 989         level = simple_strtoul(str, NULL, 0);
 990
 991         if (level > 100)
 992                 return -EFAULT;
 993
 994         /* validate through the list of available levels */
 995         for (i = 0; i < dev->brightness->count; i++)
 996                 if (level == dev->brightness->levels[i]) {
 997                         if (ACPI_SUCCESS
 998                             (acpi_video_device_lcd_set_level(dev, level)))
 999                                 dev->brightness->curr = level;
1000                         break;
1001                 }
1002
1003         return count;
1004 }
1005
1006 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1007 {
1008         struct acpi_video_device *dev = seq->private;
1009         int status;
1010         int i;
1011         union acpi_object *edid = NULL;
1012
1013
1014         if (!dev)
1015                 goto out;
1016
1017         status = acpi_video_device_EDID(dev, &edid, 128);
1018         if (ACPI_FAILURE(status)) {
1019                 status = acpi_video_device_EDID(dev, &edid, 256);
1020         }
1021
1022         if (ACPI_FAILURE(status)) {
1023                 goto out;
1024         }
1025
1026         if (edid && edid->type == ACPI_TYPE_BUFFER) {
1027                 for (i = 0; i < edid->buffer.length; i++)
1028                         seq_putc(seq, edid->buffer.pointer[i]);
1029         }
1030
1031       out:
1032         if (!edid)
1033                 seq_printf(seq, "<not supported>\n");
1034         else
1035                 kfree(edid);
1036
1037         return 0;
1038 }
1039
1040 static int
1041 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1042 {
1043         return single_open(file, acpi_video_device_EDID_seq_show,
1044                            PDE(inode)->data);
1045 }
1046
1047 static int acpi_video_device_add_fs(struct acpi_device *device)
1048 {
1049         struct proc_dir_entry *entry, *device_dir;
1050         struct acpi_video_device *vid_dev;
1051
1052         vid_dev = acpi_driver_data(device);
1053         if (!vid_dev)
1054                 return -ENODEV;
1055
1056         device_dir = proc_mkdir(acpi_device_bid(device),
1057                                 vid_dev->video->dir);
1058         if (!device_dir)
1059                 return -ENOMEM;
1060
1061         device_dir->owner = THIS_MODULE;
1062
1063         /* 'info' [R] */
1064         entry = create_proc_entry("info", S_IRUGO, device_dir);
1065         if (!entry)
1066                 goto err_remove_dir;
1067
1068         entry->proc_fops = &acpi_video_device_info_fops;
1069         entry->data = acpi_driver_data(device);
1070         entry->owner = THIS_MODULE;
1071
1072         /* 'state' [R/W] */
1073         entry = create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
1074                                   device_dir);
1075         if (!entry)
1076                 goto err_remove_info;
1077
1078         acpi_video_device_state_fops.write = acpi_video_device_write_state;
1079         entry->proc_fops = &acpi_video_device_state_fops;
1080         entry->data = acpi_driver_data(device);
1081         entry->owner = THIS_MODULE;
1082
1083         /* 'brightness' [R/W] */
1084         entry = create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1085                                   device_dir);
1086         if (!entry)
1087                 goto err_remove_state;
1088
1089         acpi_video_device_brightness_fops.write =
1090                         acpi_video_device_write_brightness;
1091         entry->proc_fops = &acpi_video_device_brightness_fops;
1092         entry->data = acpi_driver_data(device);
1093         entry->owner = THIS_MODULE;
1094
1095         /* 'EDID' [R] */
1096         entry = create_proc_entry("EDID", S_IRUGO, device_dir);
1097         if (!entry)
1098                 goto err_remove_brightness;
1099
1100         entry->proc_fops = &acpi_video_device_EDID_fops;
1101         entry->data = acpi_driver_data(device);
1102         entry->owner = THIS_MODULE;
1103
1104         acpi_device_dir(device) = device_dir;
1105         return 0;
1106
1107  err_remove_brightness:
1108         remove_proc_entry("brightness", device_dir);
1109  err_remove_state:
1110         remove_proc_entry("state", device_dir);
1111  err_remove_info:
1112         remove_proc_entry("info", device_dir);
1113  err_remove_dir:
1114         remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1115         return -ENOMEM;
1116 }
1117
1118 static int acpi_video_device_remove_fs(struct acpi_device *device)
1119 {
1120         struct acpi_video_device *vid_dev;
1121         struct proc_dir_entry *device_dir;
1122
1123         vid_dev = acpi_driver_data(device);
1124         if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1125                 return -ENODEV;
1126
1127         device_dir = acpi_device_dir(device);
1128         if (device_dir) {
1129                 remove_proc_entry("info", device_dir);
1130                 remove_proc_entry("state", device_dir);
1131                 remove_proc_entry("brightness", device_dir);
1132                 remove_proc_entry("EDID", device_dir);
1133                 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1134                 acpi_device_dir(device) = NULL;
1135         }
1136
1137         return 0;
1138 }
1139
1140 /* video bus */
1141 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1142 {
1143         struct acpi_video_bus *video = seq->private;
1144
1145
1146         if (!video)
1147                 goto end;
1148
1149         seq_printf(seq, "Switching heads:              %s\n",
1150                    video->flags.multihead ? "yes" : "no");
1151         seq_printf(seq, "Video ROM:                    %s\n",
1152                    video->flags.rom ? "yes" : "no");
1153         seq_printf(seq, "Device to be POSTed on boot:  %s\n",
1154                    video->flags.post ? "yes" : "no");
1155
1156       end:
1157         return 0;
1158 }
1159
1160 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1161 {
1162         return single_open(file, acpi_video_bus_info_seq_show,
1163                            PDE(inode)->data);
1164 }
1165
1166 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1167 {
1168         struct acpi_video_bus *video = seq->private;
1169
1170
1171         if (!video)
1172                 goto end;
1173
1174         printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1175         seq_printf(seq, "<TODO>\n");
1176
1177       end:
1178         return 0;
1179 }
1180
1181 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1182 {
1183         return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1184 }
1185
1186 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1187 {
1188         struct acpi_video_bus *video = seq->private;
1189         unsigned long options;
1190         int status;
1191
1192
1193         if (!video)
1194                 goto end;
1195
1196         status = acpi_video_bus_POST_options(video, &options);
1197         if (ACPI_SUCCESS(status)) {
1198                 if (!(options & 1)) {
1199                         printk(KERN_WARNING PREFIX
1200                                "The motherboard VGA device is not listed as a possible POST device.\n");
1201                         printk(KERN_WARNING PREFIX
1202                                "This indicates a BIOS bug. Please contact the manufacturer.\n");
1203                 }
1204                 printk("%lx\n", options);
1205                 seq_printf(seq, "can POST: <integrated video>");
1206                 if (options & 2)
1207                         seq_printf(seq, " <PCI video>");
1208                 if (options & 4)
1209                         seq_printf(seq, " <AGP video>");
1210                 seq_putc(seq, '\n');
1211         } else
1212                 seq_printf(seq, "<not supported>\n");
1213       end:
1214         return 0;
1215 }
1216
1217 static int
1218 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1219 {
1220         return single_open(file, acpi_video_bus_POST_info_seq_show,
1221                            PDE(inode)->data);
1222 }
1223
1224 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1225 {
1226         struct acpi_video_bus *video = seq->private;
1227         int status;
1228         unsigned long id;
1229
1230
1231         if (!video)
1232                 goto end;
1233
1234         status = acpi_video_bus_get_POST(video, &id);
1235         if (!ACPI_SUCCESS(status)) {
1236                 seq_printf(seq, "<not supported>\n");
1237                 goto end;
1238         }
1239         seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1240
1241       end:
1242         return 0;
1243 }
1244
1245 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1246 {
1247         struct acpi_video_bus *video = seq->private;
1248
1249
1250         seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1251
1252         return 0;
1253 }
1254
1255 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1256 {
1257         return single_open(file, acpi_video_bus_POST_seq_show,
1258                            PDE(inode)->data);
1259 }
1260
1261 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1262 {
1263         return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1264 }
1265
1266 static ssize_t
1267 acpi_video_bus_write_POST(struct file *file,
1268                           const char __user * buffer,
1269                           size_t count, loff_t * data)
1270 {
1271         int status;
1272         struct seq_file *m = file->private_data;
1273         struct acpi_video_bus *video = m->private;
1274         char str[12] = { 0 };
1275         unsigned long opt, options;
1276
1277
1278         if (!video || count + 1 > sizeof str)
1279                 return -EINVAL;
1280
1281         status = acpi_video_bus_POST_options(video, &options);
1282         if (!ACPI_SUCCESS(status))
1283                 return -EINVAL;
1284
1285         if (copy_from_user(str, buffer, count))
1286                 return -EFAULT;
1287
1288         str[count] = 0;
1289         opt = strtoul(str, NULL, 0);
1290         if (opt > 3)
1291                 return -EFAULT;
1292
1293         /* just in case an OEM 'forgot' the motherboard... */
1294         options |= 1;
1295
1296         if (options & (1ul << opt)) {
1297                 status = acpi_video_bus_set_POST(video, opt);
1298                 if (!ACPI_SUCCESS(status))
1299                         return -EFAULT;
1300
1301         }
1302
1303         return count;
1304 }
1305
1306 static ssize_t
1307 acpi_video_bus_write_DOS(struct file *file,
1308                          const char __user * buffer,
1309                          size_t count, loff_t * data)
1310 {
1311         int status;
1312         struct seq_file *m = file->private_data;
1313         struct acpi_video_bus *video = m->private;
1314         char str[12] = { 0 };
1315         unsigned long opt;
1316
1317
1318         if (!video || count + 1 > sizeof str)
1319                 return -EINVAL;
1320
1321         if (copy_from_user(str, buffer, count))
1322                 return -EFAULT;
1323
1324         str[count] = 0;
1325         opt = strtoul(str, NULL, 0);
1326         if (opt > 7)
1327                 return -EFAULT;
1328
1329         status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1330
1331         if (!ACPI_SUCCESS(status))
1332                 return -EFAULT;
1333
1334         return count;
1335 }
1336
1337 static int acpi_video_bus_add_fs(struct acpi_device *device)
1338 {
1339         struct acpi_video_bus *video = acpi_driver_data(device);
1340         struct proc_dir_entry *device_dir;
1341         struct proc_dir_entry *entry;
1342
1343         device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1344         if (!device_dir)
1345                 return -ENOMEM;
1346
1347         device_dir->owner = THIS_MODULE;
1348
1349         /* 'info' [R] */
1350         entry = create_proc_entry("info", S_IRUGO, device_dir);
1351         if (!entry)
1352                 goto err_remove_dir;
1353
1354         entry->proc_fops = &acpi_video_bus_info_fops;
1355         entry->data = acpi_driver_data(device);
1356         entry->owner = THIS_MODULE;
1357
1358         /* 'ROM' [R] */
1359         entry = create_proc_entry("ROM", S_IRUGO, device_dir);
1360         if (!entry)
1361                 goto err_remove_info;
1362
1363         entry->proc_fops = &acpi_video_bus_ROM_fops;
1364         entry->data = acpi_driver_data(device);
1365         entry->owner = THIS_MODULE;
1366
1367         /* 'POST_info' [R] */
1368         entry = create_proc_entry("POST_info", S_IRUGO, device_dir);
1369         if (!entry)
1370                 goto err_remove_rom;
1371
1372         entry->proc_fops = &acpi_video_bus_POST_info_fops;
1373         entry->data = acpi_driver_data(device);
1374         entry->owner = THIS_MODULE;
1375
1376         /* 'POST' [R/W] */
1377         entry = create_proc_entry("POST", S_IFREG | S_IRUGO | S_IWUSR,
1378                                   device_dir);
1379         if (!entry)
1380                 goto err_remove_post_info;
1381
1382         acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1383         entry->proc_fops = &acpi_video_bus_POST_fops;
1384         entry->data = acpi_driver_data(device);
1385         entry->owner = THIS_MODULE;
1386
1387         /* 'DOS' [R/W] */
1388         entry = create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1389                               device_dir);
1390         if (!entry)
1391                 goto err_remove_post;
1392
1393         acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1394         entry->proc_fops = &acpi_video_bus_DOS_fops;
1395         entry->data = acpi_driver_data(device);
1396         entry->owner = THIS_MODULE;
1397
1398         video->dir = acpi_device_dir(device) = device_dir;
1399         return 0;
1400
1401  err_remove_post:
1402         remove_proc_entry("POST", device_dir);
1403  err_remove_post_info:
1404         remove_proc_entry("POST_info", device_dir);
1405  err_remove_rom:
1406         remove_proc_entry("ROM", device_dir);
1407  err_remove_info:
1408         remove_proc_entry("info", device_dir);
1409  err_remove_dir:
1410         remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1411         return -ENOMEM;
1412 }
1413
1414 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1415 {
1416         struct proc_dir_entry *device_dir = acpi_device_dir(device);
1417
1418         if (device_dir) {
1419                 remove_proc_entry("info", device_dir);
1420                 remove_proc_entry("ROM", device_dir);
1421                 remove_proc_entry("POST_info", device_dir);
1422                 remove_proc_entry("POST", device_dir);
1423                 remove_proc_entry("DOS", device_dir);
1424                 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1425                 acpi_device_dir(device) = NULL;
1426         }
1427
1428         return 0;
1429 }
1430
1431 /* --------------------------------------------------------------------------
1432                                  Driver Interface
1433    -------------------------------------------------------------------------- */
1434
1435 /* device interface */
1436 static struct acpi_video_device_attrib*
1437 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1438 {
1439         struct acpi_video_enumerated_device *ids;
1440         int i;
1441
1442         for (i = 0; i < video->attached_count; i++) {
1443                 ids = &video->attached_array[i];
1444                 if ((ids->value.int_val & 0xffff) == device_id)
1445                         return &ids->value.attrib;
1446         }
1447
1448         return NULL;
1449 }
1450
1451 static int
1452 acpi_video_bus_get_one_device(struct acpi_device *device,
1453                               struct acpi_video_bus *video)
1454 {
1455         unsigned long device_id;
1456         int status;
1457         struct acpi_video_device *data;
1458         struct acpi_video_device_attrib* attribute;
1459
1460         if (!device || !video)
1461                 return -EINVAL;
1462
1463         status =
1464             acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1465         if (ACPI_SUCCESS(status)) {
1466
1467                 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1468                 if (!data)
1469                         return -ENOMEM;
1470
1471                 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1472                 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1473                 acpi_driver_data(device) = data;
1474
1475                 data->device_id = device_id;
1476                 data->video = video;
1477                 data->dev = device;
1478
1479                 attribute = acpi_video_get_device_attr(video, device_id);
1480
1481                 if((attribute != NULL) && attribute->device_id_scheme) {
1482                         switch (attribute->display_type) {
1483                         case ACPI_VIDEO_DISPLAY_CRT:
1484                                 data->flags.crt = 1;
1485                                 break;
1486                         case ACPI_VIDEO_DISPLAY_TV:
1487                                 data->flags.tvout = 1;
1488                                 break;
1489                         case ACPI_VIDEO_DISPLAY_DVI:
1490                                 data->flags.dvi = 1;
1491                                 break;
1492                         case ACPI_VIDEO_DISPLAY_LCD:
1493                                 data->flags.lcd = 1;
1494                                 break;
1495                         default:
1496                                 data->flags.unknown = 1;
1497                                 break;
1498                         }
1499                         if(attribute->bios_can_detect)
1500                                 data->flags.bios = 1;
1501                 } else
1502                         data->flags.unknown = 1;
1503
1504                 acpi_video_device_bind(video, data);
1505                 acpi_video_device_find_cap(data);
1506
1507                 status = acpi_install_notify_handler(device->handle,
1508                                                      ACPI_DEVICE_NOTIFY,
1509                                                      acpi_video_device_notify,
1510                                                      data);
1511                 if (ACPI_FAILURE(status)) {
1512                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1513                                           "Error installing notify handler\n"));
1514                         if(data->brightness)
1515                                 kfree(data->brightness->levels);
1516                         kfree(data->brightness);
1517                         kfree(data);
1518                         return -ENODEV;
1519                 }
1520
1521                 mutex_lock(&video->device_list_lock);
1522                 list_add_tail(&data->entry, &video->video_device_list);
1523                 mutex_unlock(&video->device_list_lock);
1524
1525                 acpi_video_device_add_fs(device);
1526
1527                 return 0;
1528         }
1529
1530         return -ENOENT;
1531 }
1532
1533 /*
1534  *  Arg:
1535  *      video   : video bus device
1536  *
1537  *  Return:
1538  *      none
1539  *
1540  *  Enumerate the video device list of the video bus,
1541  *  bind the ids with the corresponding video devices
1542  *  under the video bus.
1543  */
1544
1545 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1546 {
1547         struct acpi_video_device *dev;
1548
1549         mutex_lock(&video->device_list_lock);
1550
1551         list_for_each_entry(dev, &video->video_device_list, entry)
1552                 acpi_video_device_bind(video, dev);
1553
1554         mutex_unlock(&video->device_list_lock);
1555 }
1556
1557 /*
1558  *  Arg:
1559  *      video   : video bus device
1560  *      device  : video output device under the video
1561  *              bus
1562  *
1563  *  Return:
1564  *      none
1565  *
1566  *  Bind the ids with the corresponding video devices
1567  *  under the video bus.
1568  */
1569
1570 static void
1571 acpi_video_device_bind(struct acpi_video_bus *video,
1572                        struct acpi_video_device *device)
1573 {
1574         struct acpi_video_enumerated_device *ids;
1575         int i;
1576
1577         for (i = 0; i < video->attached_count; i++) {
1578                 ids = &video->attached_array[i];
1579                 if (device->device_id == (ids->value.int_val & 0xffff)) {
1580                         ids->bind_info = device;
1581                         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1582                 }
1583         }
1584 }
1585
1586 /*
1587  *  Arg:
1588  *      video   : video bus device
1589  *
1590  *  Return:
1591  *      < 0     : error
1592  *
1593  *  Call _DOD to enumerate all devices attached to display adapter
1594  *
1595  */
1596
1597 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1598 {
1599         int status;
1600         int count;
1601         int i;
1602         struct acpi_video_enumerated_device *active_list;
1603         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1604         union acpi_object *dod = NULL;
1605         union acpi_object *obj;
1606
1607         status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1608         if (!ACPI_SUCCESS(status)) {
1609                 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1610                 return status;
1611         }
1612
1613         dod = buffer.pointer;
1614         if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1615                 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1616                 status = -EFAULT;
1617                 goto out;
1618         }
1619
1620         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1621                           dod->package.count));
1622
1623         active_list = kcalloc(1 + dod->package.count,
1624                               sizeof(struct acpi_video_enumerated_device),
1625                               GFP_KERNEL);
1626         if (!active_list) {
1627                 status = -ENOMEM;
1628                 goto out;
1629         }
1630
1631         count = 0;
1632         for (i = 0; i < dod->package.count; i++) {
1633                 obj = &dod->package.elements[i];
1634
1635                 if (obj->type != ACPI_TYPE_INTEGER) {
1636                         printk(KERN_ERR PREFIX
1637                                 "Invalid _DOD data in element %d\n", i);
1638                         continue;
1639                 }
1640
1641                 active_list[count].value.int_val = obj->integer.value;
1642                 active_list[count].bind_info = NULL;
1643                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1644                                   (int)obj->integer.value));
1645                 count++;
1646         }
1647
1648         kfree(video->attached_array);
1649
1650         video->attached_array = active_list;
1651         video->attached_count = count;
1652
1653  out:
1654         kfree(buffer.pointer);
1655         return status;
1656 }
1657
1658 static int
1659 acpi_video_get_next_level(struct acpi_video_device *device,
1660                           u32 level_current, u32 event)
1661 {
1662         int min, max, min_above, max_below, i, l, delta = 255;
1663         max = max_below = 0;
1664         min = min_above = 255;
1665         /* Find closest level to level_current */
1666         for (i = 0; i < device->brightness->count; i++) {
1667                 l = device->brightness->levels[i];
1668                 if (abs(l - level_current) < abs(delta)) {
1669                         delta = l - level_current;
1670                         if (!delta)
1671                                 break;
1672                 }
1673         }
1674         /* Ajust level_current to closest available level */
1675         level_current += delta;
1676         for (i = 0; i < device->brightness->count; i++) {
1677                 l = device->brightness->levels[i];
1678                 if (l < min)
1679                         min = l;
1680                 if (l > max)
1681                         max = l;
1682                 if (l < min_above && l > level_current)
1683                         min_above = l;
1684                 if (l > max_below && l < level_current)
1685                         max_below = l;
1686         }
1687
1688         switch (event) {
1689         case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1690                 return (level_current < max) ? min_above : min;
1691         case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1692                 return (level_current < max) ? min_above : max;
1693         case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1694                 return (level_current > min) ? max_below : min;
1695         case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1696         case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1697                 return 0;
1698         default:
1699                 return level_current;
1700         }
1701 }
1702
1703 static void
1704 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1705 {
1706         unsigned long level_current, level_next;
1707         acpi_video_device_lcd_get_level_current(device, &level_current);
1708         level_next = acpi_video_get_next_level(device, level_current, event);
1709         acpi_video_device_lcd_set_level(device, level_next);
1710 }
1711
1712 static int
1713 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1714                            struct acpi_device *device)
1715 {
1716         int status = 0;
1717         struct acpi_device *dev;
1718
1719         acpi_video_device_enumerate(video);
1720
1721         list_for_each_entry(dev, &device->children, node) {
1722
1723                 status = acpi_video_bus_get_one_device(dev, video);
1724                 if (ACPI_FAILURE(status)) {
1725                         ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1726                         continue;
1727                 }
1728         }
1729         return status;
1730 }
1731
1732 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1733 {
1734         acpi_status status;
1735         struct acpi_video_bus *video;
1736
1737
1738         if (!device || !device->video)
1739                 return -ENOENT;
1740
1741         video = device->video;
1742
1743         acpi_video_device_remove_fs(device->dev);
1744
1745         status = acpi_remove_notify_handler(device->dev->handle,
1746                                             ACPI_DEVICE_NOTIFY,
1747                                             acpi_video_device_notify);
1748         backlight_device_unregister(device->backlight);
1749         if (device->cdev) {
1750                 sysfs_remove_link(&device->dev->dev.kobj,
1751                                   "thermal_cooling");
1752                 sysfs_remove_link(&device->cdev->device.kobj,
1753                                   "device");
1754                 thermal_cooling_device_unregister(device->cdev);
1755                 device->cdev = NULL;
1756         }
1757         video_output_unregister(device->output_dev);
1758
1759         return 0;
1760 }
1761
1762 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1763 {
1764         int status;
1765         struct acpi_video_device *dev, *next;
1766
1767         mutex_lock(&video->device_list_lock);
1768
1769         list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1770
1771                 status = acpi_video_bus_put_one_device(dev);
1772                 if (ACPI_FAILURE(status))
1773                         printk(KERN_WARNING PREFIX
1774                                "hhuuhhuu bug in acpi video driver.\n");
1775
1776                 if (dev->brightness) {
1777                         kfree(dev->brightness->levels);
1778                         kfree(dev->brightness);
1779                 }
1780                 list_del(&dev->entry);
1781                 kfree(dev);
1782         }
1783
1784         mutex_unlock(&video->device_list_lock);
1785
1786         return 0;
1787 }
1788
1789 /* acpi_video interface */
1790
1791 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1792 {
1793         return acpi_video_bus_DOS(video, 0, 0);
1794 }
1795
1796 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1797 {
1798         return acpi_video_bus_DOS(video, 0, 1);
1799 }
1800
1801 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1802 {
1803         struct acpi_video_bus *video = data;
1804         struct acpi_device *device = NULL;
1805         struct input_dev *input;
1806         int keycode;
1807
1808         if (!video)
1809                 return;
1810
1811         device = video->device;
1812         input = video->input;
1813
1814         switch (event) {
1815         case ACPI_VIDEO_NOTIFY_SWITCH:  /* User requested a switch,
1816                                          * most likely via hotkey. */
1817                 acpi_bus_generate_proc_event(device, event, 0);
1818                 keycode = KEY_SWITCHVIDEOMODE;
1819                 break;
1820
1821         case ACPI_VIDEO_NOTIFY_PROBE:   /* User plugged in or removed a video
1822                                          * connector. */
1823                 acpi_video_device_enumerate(video);
1824                 acpi_video_device_rebind(video);
1825                 acpi_bus_generate_proc_event(device, event, 0);
1826                 keycode = KEY_SWITCHVIDEOMODE;
1827                 break;
1828
1829         case ACPI_VIDEO_NOTIFY_CYCLE:   /* Cycle Display output hotkey pressed. */
1830                 acpi_bus_generate_proc_event(device, event, 0);
1831                 keycode = KEY_SWITCHVIDEOMODE;
1832                 break;
1833         case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:     /* Next Display output hotkey pressed. */
1834                 acpi_bus_generate_proc_event(device, event, 0);
1835                 keycode = KEY_VIDEO_NEXT;
1836                 break;
1837         case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:     /* previous Display output hotkey pressed. */
1838                 acpi_bus_generate_proc_event(device, event, 0);
1839                 keycode = KEY_VIDEO_PREV;
1840                 break;
1841
1842         default:
1843                 keycode = KEY_UNKNOWN;
1844                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1845                                   "Unsupported event [0x%x]\n", event));
1846                 break;
1847         }
1848
1849         acpi_notifier_call_chain(device, event, 0);
1850         input_report_key(input, keycode, 1);
1851         input_sync(input);
1852         input_report_key(input, keycode, 0);
1853         input_sync(input);
1854
1855         return;
1856 }
1857
1858 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1859 {
1860         struct acpi_video_device *video_device = data;
1861         struct acpi_device *device = NULL;
1862         struct acpi_video_bus *bus;
1863         struct input_dev *input;
1864         int keycode;
1865
1866         if (!video_device)
1867                 return;
1868
1869         device = video_device->dev;
1870         bus = video_device->video;
1871         input = bus->input;
1872
1873         switch (event) {
1874         case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:        /* Cycle brightness */
1875                 if (brightness_switch_enabled)
1876                         acpi_video_switch_brightness(video_device, event);
1877                 acpi_bus_generate_proc_event(device, event, 0);
1878                 keycode = KEY_BRIGHTNESS_CYCLE;
1879                 break;
1880         case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:  /* Increase brightness */
1881                 if (brightness_switch_enabled)
1882                         acpi_video_switch_brightness(video_device, event);
1883                 acpi_bus_generate_proc_event(device, event, 0);
1884                 keycode = KEY_BRIGHTNESSUP;
1885                 break;
1886         case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:  /* Decrease brightness */
1887                 if (brightness_switch_enabled)
1888                         acpi_video_switch_brightness(video_device, event);
1889                 acpi_bus_generate_proc_event(device, event, 0);
1890                 keycode = KEY_BRIGHTNESSDOWN;
1891                 break;
1892         case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1893                 if (brightness_switch_enabled)
1894                         acpi_video_switch_brightness(video_device, event);
1895                 acpi_bus_generate_proc_event(device, event, 0);
1896                 keycode = KEY_BRIGHTNESS_ZERO;
1897                 break;
1898         case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:     /* display device off */
1899                 if (brightness_switch_enabled)
1900                         acpi_video_switch_brightness(video_device, event);
1901                 acpi_bus_generate_proc_event(device, event, 0);
1902                 keycode = KEY_DISPLAY_OFF;
1903                 break;
1904         default:
1905                 keycode = KEY_UNKNOWN;
1906                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1907                                   "Unsupported event [0x%x]\n", event));
1908                 break;
1909         }
1910
1911         acpi_notifier_call_chain(device, event, 0);
1912         input_report_key(input, keycode, 1);
1913         input_sync(input);
1914         input_report_key(input, keycode, 0);
1915         input_sync(input);
1916
1917         return;
1918 }
1919
1920 static int instance;
1921 static int acpi_video_resume(struct acpi_device *device)
1922 {
1923         struct acpi_video_bus *video;
1924         struct acpi_video_device *video_device;
1925         int i;
1926
1927         if (!device || !acpi_driver_data(device))
1928                 return -EINVAL;
1929
1930         video = acpi_driver_data(device);
1931
1932         for (i = 0; i < video->attached_count; i++) {
1933                 video_device = video->attached_array[i].bind_info;
1934                 if (video_device && video_device->backlight)
1935                         acpi_video_set_brightness(video_device->backlight);
1936         }
1937         return AE_OK;
1938 }
1939
1940 static int acpi_video_bus_add(struct acpi_device *device)
1941 {
1942         acpi_status status;
1943         struct acpi_video_bus *video;
1944         struct input_dev *input;
1945         int error;
1946
1947         video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1948         if (!video)
1949                 return -ENOMEM;
1950
1951         /* a hack to fix the duplicate name "VID" problem on T61 */
1952         if (!strcmp(device->pnp.bus_id, "VID")) {
1953                 if (instance)
1954                         device->pnp.bus_id[3] = '0' + instance;
1955                 instance ++;
1956         }
1957
1958         video->device = device;
1959         strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1960         strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1961         acpi_driver_data(device) = video;
1962
1963         acpi_video_bus_find_cap(video);
1964         error = acpi_video_bus_check(video);
1965         if (error)
1966                 goto err_free_video;
1967
1968         error = acpi_video_bus_add_fs(device);
1969         if (error)
1970                 goto err_free_video;
1971
1972         mutex_init(&video->device_list_lock);
1973         INIT_LIST_HEAD(&video->video_device_list);
1974
1975         acpi_video_bus_get_devices(video, device);
1976         acpi_video_bus_start_devices(video);
1977
1978         status = acpi_install_notify_handler(device->handle,
1979                                              ACPI_DEVICE_NOTIFY,
1980                                              acpi_video_bus_notify, video);
1981         if (ACPI_FAILURE(status)) {
1982                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1983                                   "Error installing notify handler\n"));
1984                 error = -ENODEV;
1985                 goto err_stop_video;
1986         }
1987
1988         video->input = input = input_allocate_device();
1989         if (!input) {
1990                 error = -ENOMEM;
1991                 goto err_uninstall_notify;
1992         }
1993
1994         snprintf(video->phys, sizeof(video->phys),
1995                 "%s/video/input0", acpi_device_hid(video->device));
1996
1997         input->name = acpi_device_name(video->device);
1998         input->phys = video->phys;
1999         input->id.bustype = BUS_HOST;
2000         input->id.product = 0x06;
2001         input->dev.parent = &device->dev;
2002         input->evbit[0] = BIT(EV_KEY);
2003         set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2004         set_bit(KEY_VIDEO_NEXT, input->keybit);
2005         set_bit(KEY_VIDEO_PREV, input->keybit);
2006         set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2007         set_bit(KEY_BRIGHTNESSUP, input->keybit);
2008         set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2009         set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2010         set_bit(KEY_DISPLAY_OFF, input->keybit);
2011         set_bit(KEY_UNKNOWN, input->keybit);
2012
2013         error = input_register_device(input);
2014         if (error)
2015                 goto err_free_input_dev;
2016
2017         printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s  rom: %s  post: %s)\n",
2018                ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2019                video->flags.multihead ? "yes" : "no",
2020                video->flags.rom ? "yes" : "no",
2021                video->flags.post ? "yes" : "no");
2022
2023         return 0;
2024
2025  err_free_input_dev:
2026         input_free_device(input);
2027  err_uninstall_notify:
2028         acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2029                                    acpi_video_bus_notify);
2030  err_stop_video:
2031         acpi_video_bus_stop_devices(video);
2032         acpi_video_bus_put_devices(video);
2033         kfree(video->attached_array);
2034         acpi_video_bus_remove_fs(device);
2035  err_free_video:
2036         kfree(video);
2037         acpi_driver_data(device) = NULL;
2038
2039         return error;
2040 }
2041
2042 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2043 {
2044         acpi_status status = 0;
2045         struct acpi_video_bus *video = NULL;
2046
2047
2048         if (!device || !acpi_driver_data(device))
2049                 return -EINVAL;
2050
2051         video = acpi_driver_data(device);
2052
2053         acpi_video_bus_stop_devices(video);
2054
2055         status = acpi_remove_notify_handler(video->device->handle,
2056                                             ACPI_DEVICE_NOTIFY,
2057                                             acpi_video_bus_notify);
2058
2059         acpi_video_bus_put_devices(video);
2060         acpi_video_bus_remove_fs(device);
2061
2062         input_unregister_device(video->input);
2063         kfree(video->attached_array);
2064         kfree(video);
2065
2066         return 0;
2067 }
2068
2069 static int __init acpi_video_init(void)
2070 {
2071         int result = 0;
2072
2073
2074         /*
2075            acpi_dbg_level = 0xFFFFFFFF;
2076            acpi_dbg_layer = 0x08000000;
2077          */
2078
2079         acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2080         if (!acpi_video_dir)
2081                 return -ENODEV;
2082         acpi_video_dir->owner = THIS_MODULE;
2083
2084         result = acpi_bus_register_driver(&acpi_video_bus);
2085         if (result < 0) {
2086                 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2087                 return -ENODEV;
2088         }
2089
2090         return 0;
2091 }
2092
2093 static void __exit acpi_video_exit(void)
2094 {
2095
2096         acpi_bus_unregister_driver(&acpi_video_bus);
2097
2098         remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2099
2100         return;
2101 }
2102
2103 module_init(acpi_video_init);
2104 module_exit(acpi_video_exit);