Pileus Git - ~andy/linux/blob - 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         .owner = THIS_MODULE,
 194         .open = acpi_video_bus_info_open_fs,
 195         .read = seq_read,
 196         .llseek = seq_lseek,
 197         .release = single_release,
 198 };
 199
 200 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
 201 static struct file_operations acpi_video_bus_ROM_fops = {
 202         .owner = THIS_MODULE,
 203         .open = acpi_video_bus_ROM_open_fs,
 204         .read = seq_read,
 205         .llseek = seq_lseek,
 206         .release = single_release,
 207 };
 208
 209 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
 210                                             struct file *file);
 211 static struct file_operations acpi_video_bus_POST_info_fops = {
 212         .owner = THIS_MODULE,
 213         .open = acpi_video_bus_POST_info_open_fs,
 214         .read = seq_read,
 215         .llseek = seq_lseek,
 216         .release = single_release,
 217 };
 218
 219 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
 220 static struct file_operations acpi_video_bus_POST_fops = {
 221         .owner = THIS_MODULE,
 222         .open = acpi_video_bus_POST_open_fs,
 223         .read = seq_read,
 224         .llseek = seq_lseek,
 225         .release = single_release,
 226 };
 227
 228 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
 229 static struct file_operations acpi_video_bus_DOS_fops = {
 230         .owner = THIS_MODULE,
 231         .open = acpi_video_bus_DOS_open_fs,
 232         .read = seq_read,
 233         .llseek = seq_lseek,
 234         .release = single_release,
 235 };
 236
 237 /* device */
 238 static int acpi_video_device_info_open_fs(struct inode *inode,
 239                                           struct file *file);
 240 static struct file_operations acpi_video_device_info_fops = {
 241         .owner = THIS_MODULE,
 242         .open = acpi_video_device_info_open_fs,
 243         .read = seq_read,
 244         .llseek = seq_lseek,
 245         .release = single_release,
 246 };
 247
 248 static int acpi_video_device_state_open_fs(struct inode *inode,
 249                                            struct file *file);
 250 static struct file_operations acpi_video_device_state_fops = {
 251         .owner = THIS_MODULE,
 252         .open = acpi_video_device_state_open_fs,
 253         .read = seq_read,
 254         .llseek = seq_lseek,
 255         .release = single_release,
 256 };
 257
 258 static int acpi_video_device_brightness_open_fs(struct inode *inode,
 259                                                 struct file *file);
 260 static struct file_operations acpi_video_device_brightness_fops = {
 261         .owner = THIS_MODULE,
 262         .open = acpi_video_device_brightness_open_fs,
 263         .read = seq_read,
 264         .llseek = seq_lseek,
 265         .release = single_release,
 266 };
 267
 268 static int acpi_video_device_EDID_open_fs(struct inode *inode,
 269                                           struct file *file);
 270 static struct file_operations acpi_video_device_EDID_fops = {
 271         .owner = THIS_MODULE,
 272         .open = acpi_video_device_EDID_open_fs,
 273         .read = seq_read,
 274         .llseek = seq_lseek,
 275         .release = single_release,
 276 };
 277
 278 static char device_decode[][30] = {
 279         "motherboard VGA device",
 280         "PCI VGA device",
 281         "AGP VGA device",
 282         "UNKNOWN",
 283 };
 284
 285 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
 286 static void acpi_video_device_rebind(struct acpi_video_bus *video);
 287 static void acpi_video_device_bind(struct acpi_video_bus *video,
 288                                    struct acpi_video_device *device);
 289 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
 290 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
 291                         int level);
 292 static int acpi_video_device_lcd_get_level_current(
 293                         struct acpi_video_device *device,
 294                         unsigned long long *level);
 295 static int acpi_video_get_next_level(struct acpi_video_device *device,
 296                                      u32 level_current, u32 event);
 297 static void acpi_video_switch_brightness(struct acpi_video_device *device,
 298                                          int event);
 299 static int acpi_video_device_get_state(struct acpi_video_device *device,
 300                             unsigned long long *state);
 301 static int acpi_video_output_get(struct output_device *od);
 302 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
 303
 304 /*backlight device sysfs support*/
 305 static int acpi_video_get_brightness(struct backlight_device *bd)
 306 {
 307         unsigned long long cur_level;
 308         int i;
 309         struct acpi_video_device *vd =
 310                 (struct acpi_video_device *)bl_get_data(bd);
 311         acpi_video_device_lcd_get_level_current(vd, &cur_level);
 312         for (i = 2; i < vd->brightness->count; i++) {
 313                 if (vd->brightness->levels[i] == cur_level)
 314                         /* The first two entries are special - see page 575
 315                            of the ACPI spec 3.0 */
 316                         return i-2;
 317         }
 318         return 0;
 319 }
 320
 321 static int acpi_video_set_brightness(struct backlight_device *bd)
 322 {
 323         int request_level = bd->props.brightness+2;
 324         struct acpi_video_device *vd =
 325                 (struct acpi_video_device *)bl_get_data(bd);
 326         acpi_video_device_lcd_set_level(vd,
 327                                         vd->brightness->levels[request_level]);
 328         return 0;
 329 }
 330
 331 static struct backlight_ops acpi_backlight_ops = {
 332         .get_brightness = acpi_video_get_brightness,
 333         .update_status  = acpi_video_set_brightness,
 334 };
 335
 336 /*video output device sysfs support*/
 337 static int acpi_video_output_get(struct output_device *od)
 338 {
 339         unsigned long long state;
 340         struct acpi_video_device *vd =
 341                 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
 342         acpi_video_device_get_state(vd, &state);
 343         return (int)state;
 344 }
 345
 346 static int acpi_video_output_set(struct output_device *od)
 347 {
 348         unsigned long state = od->request_state;
 349         struct acpi_video_device *vd=
 350                 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
 351         return acpi_video_device_set_state(vd, state);
 352 }
 353
 354 static struct output_properties acpi_output_properties = {
 355         .set_state = acpi_video_output_set,
 356         .get_status = acpi_video_output_get,
 357 };
 358
 359
 360 /* thermal cooling device callbacks */
 361 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
 362 {
 363         struct acpi_device *device = cdev->devdata;
 364         struct acpi_video_device *video = acpi_driver_data(device);
 365
 366         return sprintf(buf, "%d\n", video->brightness->count - 3);
 367 }
 368
 369 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
 370 {
 371         struct acpi_device *device = cdev->devdata;
 372         struct acpi_video_device *video = acpi_driver_data(device);
 373         unsigned long long level;
 374         int state;
 375
 376         acpi_video_device_lcd_get_level_current(video, &level);
 377         for (state = 2; state < video->brightness->count; state++)
 378                 if (level == video->brightness->levels[state])
 379                         return sprintf(buf, "%d\n",
 380                                        video->brightness->count - state - 1);
 381
 382         return -EINVAL;
 383 }
 384
 385 static int
 386 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
 387 {
 388         struct acpi_device *device = cdev->devdata;
 389         struct acpi_video_device *video = acpi_driver_data(device);
 390         int level;
 391
 392         if ( state >= video->brightness->count - 2)
 393                 return -EINVAL;
 394
 395         state = video->brightness->count - state;
 396         level = video->brightness->levels[state -1];
 397         return acpi_video_device_lcd_set_level(video, level);
 398 }
 399
 400 static struct thermal_cooling_device_ops video_cooling_ops = {
 401         .get_max_state = video_get_max_state,
 402         .get_cur_state = video_get_cur_state,
 403         .set_cur_state = video_set_cur_state,
 404 };
 405
 406 /* --------------------------------------------------------------------------
 407                                Video Management
 408    -------------------------------------------------------------------------- */
 409
 410 /* device */
 411
 412 static int
 413 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
 414 {
 415         int status;
 416
 417         status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
 418
 419         return status;
 420 }
 421
 422 static int
 423 acpi_video_device_get_state(struct acpi_video_device *device,
 424                             unsigned long long *state)
 425 {
 426         int status;
 427
 428         status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
 429
 430         return status;
 431 }
 432
 433 static int
 434 acpi_video_device_set_state(struct acpi_video_device *device, int state)
 435 {
 436         int status;
 437         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 438         struct acpi_object_list args = { 1, &arg0 };
 439         unsigned long long ret;
 440
 441
 442         arg0.integer.value = state;
 443         status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
 444
 445         return status;
 446 }
 447
 448 static int
 449 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
 450                                    union acpi_object **levels)
 451 {
 452         int status;
 453         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 454         union acpi_object *obj;
 455
 456
 457         *levels = NULL;
 458
 459         status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
 460         if (!ACPI_SUCCESS(status))
 461                 return status;
 462         obj = (union acpi_object *)buffer.pointer;
 463         if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 464                 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
 465                 status = -EFAULT;
 466                 goto err;
 467         }
 468
 469         *levels = obj;
 470
 471         return 0;
 472
 473       err:
 474         kfree(buffer.pointer);
 475
 476         return status;
 477 }
 478
 479 static int
 480 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
 481 {
 482         int status = AE_OK;
 483         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 484         struct acpi_object_list args = { 1, &arg0 };
 485
 486
 487         arg0.integer.value = level;
 488
 489         if (device->cap._BCM)
 490                 status = acpi_evaluate_object(device->dev->handle, "_BCM",
 491                                               &args, NULL);
 492         device->brightness->curr = level;
 493         return status;
 494 }
 495
 496 static int
 497 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
 498                                         unsigned long long *level)
 499 {
 500         if (device->cap._BQC)
 501                 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
 502                                              level);
 503         *level = device->brightness->curr;
 504         return AE_OK;
 505 }
 506
 507 static int
 508 acpi_video_device_EDID(struct acpi_video_device *device,
 509                        union acpi_object **edid, ssize_t length)
 510 {
 511         int status;
 512         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 513         union acpi_object *obj;
 514         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 515         struct acpi_object_list args = { 1, &arg0 };
 516
 517
 518         *edid = NULL;
 519
 520         if (!device)
 521                 return -ENODEV;
 522         if (length == 128)
 523                 arg0.integer.value = 1;
 524         else if (length == 256)
 525                 arg0.integer.value = 2;
 526         else
 527                 return -EINVAL;
 528
 529         status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
 530         if (ACPI_FAILURE(status))
 531                 return -ENODEV;
 532
 533         obj = buffer.pointer;
 534
 535         if (obj && obj->type == ACPI_TYPE_BUFFER)
 536                 *edid = obj;
 537         else {
 538                 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
 539                 status = -EFAULT;
 540                 kfree(obj);
 541         }
 542
 543         return status;
 544 }
 545
 546 /* bus */
 547
 548 static int
 549 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
 550 {
 551         int status;
 552         unsigned long long tmp;
 553         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 554         struct acpi_object_list args = { 1, &arg0 };
 555
 556
 557         arg0.integer.value = option;
 558
 559         status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
 560         if (ACPI_SUCCESS(status))
 561                 status = tmp ? (-EINVAL) : (AE_OK);
 562
 563         return status;
 564 }
 565
 566 static int
 567 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
 568 {
 569         int status;
 570
 571         status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
 572
 573         return status;
 574 }
 575
 576 static int
 577 acpi_video_bus_POST_options(struct acpi_video_bus *video,
 578                             unsigned long long *options)
 579 {
 580         int status;
 581
 582         status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
 583         *options &= 3;
 584
 585         return status;
 586 }
 587
 588 /*
 589  *  Arg:
 590  *      video           : video bus device pointer
 591  *      bios_flag       :
 592  *              0.      The system BIOS should NOT automatically switch(toggle)
 593  *                      the active display output.
 594  *              1.      The system BIOS should automatically switch (toggle) the
 595  *                      active display output. No switch event.
 596  *              2.      The _DGS value should be locked.
 597  *              3.      The system BIOS should not automatically switch (toggle) the
 598  *                      active display output, but instead generate the display switch
 599  *                      event notify code.
 600  *      lcd_flag        :
 601  *              0.      The system BIOS should automatically control the brightness level
 602  *                      of the LCD when the power changes from AC to DC
 603  *              1.      The system BIOS should NOT automatically control the brightness
 604  *                      level of the LCD when the power changes from AC to DC.
 605  * Return Value:
 606  *              -1      wrong arg.
 607  */
 608
 609 static int
 610 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
 611 {
 612         acpi_integer status = 0;
 613         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 614         struct acpi_object_list args = { 1, &arg0 };
 615
 616
 617         if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
 618                 status = -1;
 619                 goto Failed;
 620         }
 621         arg0.integer.value = (lcd_flag << 2) | bios_flag;
 622         video->dos_setting = arg0.integer.value;
 623         acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
 624
 625       Failed:
 626         return status;
 627 }
 628
 629 /*
 630  *  Arg:
 631  *      device  : video output device (LCD, CRT, ..)
 632  *
 633  *  Return Value:
 634  *      Maximum brightness level
 635  *
 636  *  Allocate and initialize device->brightness.
 637  */
 638
 639 static int
 640 acpi_video_init_brightness(struct acpi_video_device *device)
 641 {
 642         union acpi_object *obj = NULL;
 643         int i, max_level = 0, count = 0;
 644         union acpi_object *o;
 645         struct acpi_video_device_brightness *br = NULL;
 646
 647         if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
 648                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
 649                                                 "LCD brightness level\n"));
 650                 goto out;
 651         }
 652
 653         if (obj->package.count < 2)
 654                 goto out;
 655
 656         br = kzalloc(sizeof(*br), GFP_KERNEL);
 657         if (!br) {
 658                 printk(KERN_ERR "can't allocate memory\n");
 659                 goto out;
 660         }
 661
 662         br->levels = kmalloc(obj->package.count * sizeof *(br->levels),
 663                                 GFP_KERNEL);
 664         if (!br->levels)
 665                 goto out_free;
 666
 667         for (i = 0; i < obj->package.count; i++) {
 668                 o = (union acpi_object *)&obj->package.elements[i];
 669                 if (o->type != ACPI_TYPE_INTEGER) {
 670                         printk(KERN_ERR PREFIX "Invalid data\n");
 671                         continue;
 672                 }
 673                 br->levels[count] = (u32) o->integer.value;
 674
 675                 if (br->levels[count] > max_level)
 676                         max_level = br->levels[count];
 677                 count++;
 678         }
 679
 680         if (count < 2)
 681                 goto out_free_levels;
 682
 683         br->count = count;
 684         device->brightness = br;
 685         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "found %d brightness levels\n", count));
 686         kfree(obj);
 687         return max_level;
 688
 689 out_free_levels:
 690         kfree(br->levels);
 691 out_free:
 692         kfree(br);
 693 out:
 694         device->brightness = NULL;
 695         kfree(obj);
 696         return 0;
 697 }
 698
 699 /*
 700  *  Arg:
 701  *      device  : video output device (LCD, CRT, ..)
 702  *
 703  *  Return Value:
 704  *      None
 705  *
 706  *  Find out all required AML methods defined under the output
 707  *  device.
 708  */
 709
 710 static void acpi_video_device_find_cap(struct acpi_video_device *device)
 711 {
 712         acpi_handle h_dummy1;
 713         u32 max_level = 0;
 714
 715
 716         memset(&device->cap, 0, sizeof(device->cap));
 717
 718         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
 719                 device->cap._ADR = 1;
 720         }
 721         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
 722                 device->cap._BCL = 1;
 723         }
 724         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
 725                 device->cap._BCM = 1;
 726         }
 727         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
 728                 device->cap._BQC = 1;
 729         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
 730                 device->cap._DDC = 1;
 731         }
 732         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
 733                 device->cap._DCS = 1;
 734         }
 735         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
 736                 device->cap._DGS = 1;
 737         }
 738         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
 739                 device->cap._DSS = 1;
 740         }
 741
 742         max_level = acpi_video_init_brightness(device);
 743
 744         if (device->cap._BCL && device->cap._BCM && max_level > 0) {
 745                 int result;
 746                 static int count = 0;
 747                 char *name;
 748                 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
 749                 if (!name)
 750                         return;
 751
 752                 sprintf(name, "acpi_video%d", count++);
 753                 device->backlight = backlight_device_register(name,
 754                         NULL, device, &acpi_backlight_ops);
 755                 device->backlight->props.max_brightness = device->brightness->count-3;
 756                 /*
 757                  * If there exists the _BQC object, the _BQC object will be
 758                  * called to get the current backlight brightness. Otherwise
 759                  * the brightness will be set to the maximum.
 760                  */
 761                 if (device->cap._BQC)
 762                         device->backlight->props.brightness =
 763                                 acpi_video_get_brightness(device->backlight);
 764                 else
 765                         device->backlight->props.brightness =
 766                                 device->backlight->props.max_brightness;
 767                 backlight_update_status(device->backlight);
 768                 kfree(name);
 769
 770                 device->cdev = thermal_cooling_device_register("LCD",
 771                                         device->dev, &video_cooling_ops);
 772                 if (IS_ERR(device->cdev))
 773                         return;
 774
 775                 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
 776                          device->cdev->id);
 777                 result = sysfs_create_link(&device->dev->dev.kobj,
 778                                 &device->cdev->device.kobj,
 779                                 "thermal_cooling");
 780                 if (result)
 781                         printk(KERN_ERR PREFIX "Create sysfs link\n");
 782                 result = sysfs_create_link(&device->cdev->device.kobj,
 783                                 &device->dev->dev.kobj, "device");
 784                 if (result)
 785                         printk(KERN_ERR PREFIX "Create sysfs link\n");
 786
 787         }
 788         if (device->cap._DCS && device->cap._DSS){
 789                 static int count = 0;
 790                 char *name;
 791                 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
 792                 if (!name)
 793                         return;
 794                 sprintf(name, "acpi_video%d", count++);
 795                 device->output_dev = video_output_register(name,
 796                                 NULL, device, &acpi_output_properties);
 797                 kfree(name);
 798         }
 799         return;
 800 }
 801
 802 /*
 803  *  Arg:
 804  *      device  : video output device (VGA)
 805  *
 806  *  Return Value:
 807  *      None
 808  *
 809  *  Find out all required AML methods defined under the video bus device.
 810  */
 811
 812 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
 813 {
 814         acpi_handle h_dummy1;
 815
 816         memset(&video->cap, 0, sizeof(video->cap));
 817         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
 818                 video->cap._DOS = 1;
 819         }
 820         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
 821                 video->cap._DOD = 1;
 822         }
 823         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
 824                 video->cap._ROM = 1;
 825         }
 826         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
 827                 video->cap._GPD = 1;
 828         }
 829         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
 830                 video->cap._SPD = 1;
 831         }
 832         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
 833                 video->cap._VPO = 1;
 834         }
 835 }
 836
 837 /*
 838  * Check whether the video bus device has required AML method to
 839  * support the desired features
 840  */
 841
 842 static int acpi_video_bus_check(struct acpi_video_bus *video)
 843 {
 844         acpi_status status = -ENOENT;
 845         struct device *dev;
 846
 847         if (!video)
 848                 return -EINVAL;
 849
 850         dev = acpi_get_physical_pci_device(video->device->handle);
 851         if (!dev)
 852                 return -ENODEV;
 853         put_device(dev);
 854
 855         /* Since there is no HID, CID and so on for VGA driver, we have
 856          * to check well known required nodes.
 857          */
 858
 859         /* Does this device support video switching? */
 860         if (video->cap._DOS) {
 861                 video->flags.multihead = 1;
 862                 status = 0;
 863         }
 864
 865         /* Does this device support retrieving a video ROM? */
 866         if (video->cap._ROM) {
 867                 video->flags.rom = 1;
 868                 status = 0;
 869         }
 870
 871         /* Does this device support configuring which video device to POST? */
 872         if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
 873                 video->flags.post = 1;
 874                 status = 0;
 875         }
 876
 877         return status;
 878 }
 879
 880 /* --------------------------------------------------------------------------
 881                               FS Interface (/proc)
 882    -------------------------------------------------------------------------- */
 883
 884 static struct proc_dir_entry *acpi_video_dir;
 885
 886 /* video devices */
 887
 888 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
 889 {
 890         struct acpi_video_device *dev = seq->private;
 891
 892
 893         if (!dev)
 894                 goto end;
 895
 896         seq_printf(seq, "device_id:    0x%04x\n", (u32) dev->device_id);
 897         seq_printf(seq, "type:         ");
 898         if (dev->flags.crt)
 899                 seq_printf(seq, "CRT\n");
 900         else if (dev->flags.lcd)
 901                 seq_printf(seq, "LCD\n");
 902         else if (dev->flags.tvout)
 903                 seq_printf(seq, "TVOUT\n");
 904         else if (dev->flags.dvi)
 905                 seq_printf(seq, "DVI\n");
 906         else
 907                 seq_printf(seq, "UNKNOWN\n");
 908
 909         seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
 910
 911       end:
 912         return 0;
 913 }
 914
 915 static int
 916 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
 917 {
 918         return single_open(file, acpi_video_device_info_seq_show,
 919                            PDE(inode)->data);
 920 }
 921
 922 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
 923 {
 924         int status;
 925         struct acpi_video_device *dev = seq->private;
 926         unsigned long long state;
 927
 928
 929         if (!dev)
 930                 goto end;
 931
 932         status = acpi_video_device_get_state(dev, &state);
 933         seq_printf(seq, "state:     ");
 934         if (ACPI_SUCCESS(status))
 935                 seq_printf(seq, "0x%02llx\n", state);
 936         else
 937                 seq_printf(seq, "<not supported>\n");
 938
 939         status = acpi_video_device_query(dev, &state);
 940         seq_printf(seq, "query:     ");
 941         if (ACPI_SUCCESS(status))
 942                 seq_printf(seq, "0x%02llx\n", state);
 943         else
 944                 seq_printf(seq, "<not supported>\n");
 945
 946       end:
 947         return 0;
 948 }
 949
 950 static int
 951 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
 952 {
 953         return single_open(file, acpi_video_device_state_seq_show,
 954                            PDE(inode)->data);
 955 }
 956
 957 static ssize_t
 958 acpi_video_device_write_state(struct file *file,
 959                               const char __user * buffer,
 960                               size_t count, loff_t * data)
 961 {
 962         int status;
 963         struct seq_file *m = file->private_data;
 964         struct acpi_video_device *dev = m->private;
 965         char str[12] = { 0 };
 966         u32 state = 0;
 967
 968
 969         if (!dev || count + 1 > sizeof str)
 970                 return -EINVAL;
 971
 972         if (copy_from_user(str, buffer, count))
 973                 return -EFAULT;
 974
 975         str[count] = 0;
 976         state = simple_strtoul(str, NULL, 0);
 977         state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
 978
 979         status = acpi_video_device_set_state(dev, state);
 980
 981         if (status)
 982                 return -EFAULT;
 983
 984         return count;
 985 }
 986
 987 static int
 988 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
 989 {
 990         struct acpi_video_device *dev = seq->private;
 991         int i;
 992
 993
 994         if (!dev || !dev->brightness) {
 995                 seq_printf(seq, "<not supported>\n");
 996                 return 0;
 997         }
 998
 999         seq_printf(seq, "levels: ");
1000         for (i = 0; i < dev->brightness->count; i++)
1001                 seq_printf(seq, " %d", dev->brightness->levels[i]);
1002         seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1003
1004         return 0;
1005 }
1006
1007 static int
1008 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1009 {
1010         return single_open(file, acpi_video_device_brightness_seq_show,
1011                            PDE(inode)->data);
1012 }
1013
1014 static ssize_t
1015 acpi_video_device_write_brightness(struct file *file,
1016                                    const char __user * buffer,
1017                                    size_t count, loff_t * data)
1018 {
1019         struct seq_file *m = file->private_data;
1020         struct acpi_video_device *dev = m->private;
1021         char str[5] = { 0 };
1022         unsigned int level = 0;
1023         int i;
1024
1025
1026         if (!dev || !dev->brightness || count + 1 > sizeof str)
1027                 return -EINVAL;
1028
1029         if (copy_from_user(str, buffer, count))
1030                 return -EFAULT;
1031
1032         str[count] = 0;
1033         level = simple_strtoul(str, NULL, 0);
1034
1035         if (level > 100)
1036                 return -EFAULT;
1037
1038         /* validate through the list of available levels */
1039         for (i = 0; i < dev->brightness->count; i++)
1040                 if (level == dev->brightness->levels[i]) {
1041                         if (ACPI_SUCCESS
1042                             (acpi_video_device_lcd_set_level(dev, level)))
1043                                 dev->brightness->curr = level;
1044                         break;
1045                 }
1046
1047         return count;
1048 }
1049
1050 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1051 {
1052         struct acpi_video_device *dev = seq->private;
1053         int status;
1054         int i;
1055         union acpi_object *edid = NULL;
1056
1057
1058         if (!dev)
1059                 goto out;
1060
1061         status = acpi_video_device_EDID(dev, &edid, 128);
1062         if (ACPI_FAILURE(status)) {
1063                 status = acpi_video_device_EDID(dev, &edid, 256);
1064         }
1065
1066         if (ACPI_FAILURE(status)) {
1067                 goto out;
1068         }
1069
1070         if (edid && edid->type == ACPI_TYPE_BUFFER) {
1071                 for (i = 0; i < edid->buffer.length; i++)
1072                         seq_putc(seq, edid->buffer.pointer[i]);
1073         }
1074
1075       out:
1076         if (!edid)
1077                 seq_printf(seq, "<not supported>\n");
1078         else
1079                 kfree(edid);
1080
1081         return 0;
1082 }
1083
1084 static int
1085 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1086 {
1087         return single_open(file, acpi_video_device_EDID_seq_show,
1088                            PDE(inode)->data);
1089 }
1090
1091 static int acpi_video_device_add_fs(struct acpi_device *device)
1092 {
1093         struct proc_dir_entry *entry, *device_dir;
1094         struct acpi_video_device *vid_dev;
1095
1096         vid_dev = acpi_driver_data(device);
1097         if (!vid_dev)
1098                 return -ENODEV;
1099
1100         device_dir = proc_mkdir(acpi_device_bid(device),
1101                                 vid_dev->video->dir);
1102         if (!device_dir)
1103                 return -ENOMEM;
1104
1105         device_dir->owner = THIS_MODULE;
1106
1107         /* 'info' [R] */
1108         entry = proc_create_data("info", S_IRUGO, device_dir,
1109                         &acpi_video_device_info_fops, acpi_driver_data(device));
1110         if (!entry)
1111                 goto err_remove_dir;
1112
1113         /* 'state' [R/W] */
1114         acpi_video_device_state_fops.write = acpi_video_device_write_state;
1115         entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1116                                  device_dir,
1117                                  &acpi_video_device_state_fops,
1118                                  acpi_driver_data(device));
1119         if (!entry)
1120                 goto err_remove_info;
1121
1122         /* 'brightness' [R/W] */
1123         acpi_video_device_brightness_fops.write =
1124                 acpi_video_device_write_brightness;
1125         entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1126                                  device_dir,
1127                                  &acpi_video_device_brightness_fops,
1128                                  acpi_driver_data(device));
1129         if (!entry)
1130                 goto err_remove_state;
1131
1132         /* 'EDID' [R] */
1133         entry = proc_create_data("EDID", S_IRUGO, device_dir,
1134                                  &acpi_video_device_EDID_fops,
1135                                  acpi_driver_data(device));
1136         if (!entry)
1137                 goto err_remove_brightness;
1138
1139         acpi_device_dir(device) = device_dir;
1140
1141         return 0;
1142
1143  err_remove_brightness:
1144         remove_proc_entry("brightness", device_dir);
1145  err_remove_state:
1146         remove_proc_entry("state", device_dir);
1147  err_remove_info:
1148         remove_proc_entry("info", device_dir);
1149  err_remove_dir:
1150         remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1151         return -ENOMEM;
1152 }
1153
1154 static int acpi_video_device_remove_fs(struct acpi_device *device)
1155 {
1156         struct acpi_video_device *vid_dev;
1157         struct proc_dir_entry *device_dir;
1158
1159         vid_dev = acpi_driver_data(device);
1160         if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1161                 return -ENODEV;
1162
1163         device_dir = acpi_device_dir(device);
1164         if (device_dir) {
1165                 remove_proc_entry("info", device_dir);
1166                 remove_proc_entry("state", device_dir);
1167                 remove_proc_entry("brightness", device_dir);
1168                 remove_proc_entry("EDID", device_dir);
1169                 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1170                 acpi_device_dir(device) = NULL;
1171         }
1172
1173         return 0;
1174 }
1175
1176 /* video bus */
1177 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1178 {
1179         struct acpi_video_bus *video = seq->private;
1180
1181
1182         if (!video)
1183                 goto end;
1184
1185         seq_printf(seq, "Switching heads:              %s\n",
1186                    video->flags.multihead ? "yes" : "no");
1187         seq_printf(seq, "Video ROM:                    %s\n",
1188                    video->flags.rom ? "yes" : "no");
1189         seq_printf(seq, "Device to be POSTed on boot:  %s\n",
1190                    video->flags.post ? "yes" : "no");
1191
1192       end:
1193         return 0;
1194 }
1195
1196 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1197 {
1198         return single_open(file, acpi_video_bus_info_seq_show,
1199                            PDE(inode)->data);
1200 }
1201
1202 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1203 {
1204         struct acpi_video_bus *video = seq->private;
1205
1206
1207         if (!video)
1208                 goto end;
1209
1210         printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1211         seq_printf(seq, "<TODO>\n");
1212
1213       end:
1214         return 0;
1215 }
1216
1217 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1218 {
1219         return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1220 }
1221
1222 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1223 {
1224         struct acpi_video_bus *video = seq->private;
1225         unsigned long long options;
1226         int status;
1227
1228
1229         if (!video)
1230                 goto end;
1231
1232         status = acpi_video_bus_POST_options(video, &options);
1233         if (ACPI_SUCCESS(status)) {
1234                 if (!(options & 1)) {
1235                         printk(KERN_WARNING PREFIX
1236                                "The motherboard VGA device is not listed as a possible POST device.\n");
1237                         printk(KERN_WARNING PREFIX
1238                                "This indicates a BIOS bug. Please contact the manufacturer.\n");
1239                 }
1240                 printk("%llx\n", options);
1241                 seq_printf(seq, "can POST: <integrated video>");
1242                 if (options & 2)
1243                         seq_printf(seq, " <PCI video>");
1244                 if (options & 4)
1245                         seq_printf(seq, " <AGP video>");
1246                 seq_putc(seq, '\n');
1247         } else
1248                 seq_printf(seq, "<not supported>\n");
1249       end:
1250         return 0;
1251 }
1252
1253 static int
1254 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1255 {
1256         return single_open(file, acpi_video_bus_POST_info_seq_show,
1257                            PDE(inode)->data);
1258 }
1259
1260 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1261 {
1262         struct acpi_video_bus *video = seq->private;
1263         int status;
1264         unsigned long long id;
1265
1266
1267         if (!video)
1268                 goto end;
1269
1270         status = acpi_video_bus_get_POST(video, &id);
1271         if (!ACPI_SUCCESS(status)) {
1272                 seq_printf(seq, "<not supported>\n");
1273                 goto end;
1274         }
1275         seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1276
1277       end:
1278         return 0;
1279 }
1280
1281 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1282 {
1283         struct acpi_video_bus *video = seq->private;
1284
1285
1286         seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1287
1288         return 0;
1289 }
1290
1291 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1292 {
1293         return single_open(file, acpi_video_bus_POST_seq_show,
1294                            PDE(inode)->data);
1295 }
1296
1297 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1298 {
1299         return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1300 }
1301
1302 static ssize_t
1303 acpi_video_bus_write_POST(struct file *file,
1304                           const char __user * buffer,
1305                           size_t count, loff_t * data)
1306 {
1307         int status;
1308         struct seq_file *m = file->private_data;
1309         struct acpi_video_bus *video = m->private;
1310         char str[12] = { 0 };
1311         unsigned long long opt, options;
1312
1313
1314         if (!video || count + 1 > sizeof str)
1315                 return -EINVAL;
1316
1317         status = acpi_video_bus_POST_options(video, &options);
1318         if (!ACPI_SUCCESS(status))
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 > 3)
1327                 return -EFAULT;
1328
1329         /* just in case an OEM 'forgot' the motherboard... */
1330         options |= 1;
1331
1332         if (options & (1ul << opt)) {
1333                 status = acpi_video_bus_set_POST(video, opt);
1334                 if (!ACPI_SUCCESS(status))
1335                         return -EFAULT;
1336
1337         }
1338
1339         return count;
1340 }
1341
1342 static ssize_t
1343 acpi_video_bus_write_DOS(struct file *file,
1344                          const char __user * buffer,
1345                          size_t count, loff_t * data)
1346 {
1347         int status;
1348         struct seq_file *m = file->private_data;
1349         struct acpi_video_bus *video = m->private;
1350         char str[12] = { 0 };
1351         unsigned long opt;
1352
1353
1354         if (!video || count + 1 > sizeof str)
1355                 return -EINVAL;
1356
1357         if (copy_from_user(str, buffer, count))
1358                 return -EFAULT;
1359
1360         str[count] = 0;
1361         opt = strtoul(str, NULL, 0);
1362         if (opt > 7)
1363                 return -EFAULT;
1364
1365         status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1366
1367         if (!ACPI_SUCCESS(status))
1368                 return -EFAULT;
1369
1370         return count;
1371 }
1372
1373 static int acpi_video_bus_add_fs(struct acpi_device *device)
1374 {
1375         struct acpi_video_bus *video = acpi_driver_data(device);
1376         struct proc_dir_entry *device_dir;
1377         struct proc_dir_entry *entry;
1378
1379         device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1380         if (!device_dir)
1381                 return -ENOMEM;
1382
1383         device_dir->owner = THIS_MODULE;
1384
1385         /* 'info' [R] */
1386         entry = proc_create_data("info", S_IRUGO, device_dir,
1387                                  &acpi_video_bus_info_fops,
1388                                  acpi_driver_data(device));
1389         if (!entry)
1390                 goto err_remove_dir;
1391
1392         /* 'ROM' [R] */
1393         entry = proc_create_data("ROM", S_IRUGO, device_dir,
1394                                  &acpi_video_bus_ROM_fops,
1395                                  acpi_driver_data(device));
1396         if (!entry)
1397                 goto err_remove_info;
1398
1399         /* 'POST_info' [R] */
1400         entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1401                                  &acpi_video_bus_POST_info_fops,
1402                                  acpi_driver_data(device));
1403         if (!entry)
1404                 goto err_remove_rom;
1405
1406         /* 'POST' [R/W] */
1407         acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1408         entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1409                                  device_dir,
1410                                  &acpi_video_bus_POST_fops,
1411                                  acpi_driver_data(device));
1412         if (!entry)
1413                 goto err_remove_post_info;
1414
1415         /* 'DOS' [R/W] */
1416         acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1417         entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1418                                  device_dir,
1419                                  &acpi_video_bus_DOS_fops,
1420                                  acpi_driver_data(device));
1421         if (!entry)
1422                 goto err_remove_post;
1423
1424         video->dir = acpi_device_dir(device) = device_dir;
1425         return 0;
1426
1427  err_remove_post:
1428         remove_proc_entry("POST", device_dir);
1429  err_remove_post_info:
1430         remove_proc_entry("POST_info", device_dir);
1431  err_remove_rom:
1432         remove_proc_entry("ROM", device_dir);
1433  err_remove_info:
1434         remove_proc_entry("info", device_dir);
1435  err_remove_dir:
1436         remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1437         return -ENOMEM;
1438 }
1439
1440 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1441 {
1442         struct proc_dir_entry *device_dir = acpi_device_dir(device);
1443
1444         if (device_dir) {
1445                 remove_proc_entry("info", device_dir);
1446                 remove_proc_entry("ROM", device_dir);
1447                 remove_proc_entry("POST_info", device_dir);
1448                 remove_proc_entry("POST", device_dir);
1449                 remove_proc_entry("DOS", device_dir);
1450                 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1451                 acpi_device_dir(device) = NULL;
1452         }
1453
1454         return 0;
1455 }
1456
1457 /* --------------------------------------------------------------------------
1458                                  Driver Interface
1459    -------------------------------------------------------------------------- */
1460
1461 /* device interface */
1462 static struct acpi_video_device_attrib*
1463 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1464 {
1465         struct acpi_video_enumerated_device *ids;
1466         int i;
1467
1468         for (i = 0; i < video->attached_count; i++) {
1469                 ids = &video->attached_array[i];
1470                 if ((ids->value.int_val & 0xffff) == device_id)
1471                         return &ids->value.attrib;
1472         }
1473
1474         return NULL;
1475 }
1476
1477 static int
1478 acpi_video_bus_get_one_device(struct acpi_device *device,
1479                               struct acpi_video_bus *video)
1480 {
1481         unsigned long long device_id;
1482         int status;
1483         struct acpi_video_device *data;
1484         struct acpi_video_device_attrib* attribute;
1485
1486         if (!device || !video)
1487                 return -EINVAL;
1488
1489         status =
1490             acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1491         if (ACPI_SUCCESS(status)) {
1492
1493                 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1494                 if (!data)
1495                         return -ENOMEM;
1496
1497                 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1498                 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1499                 device->driver_data = data;
1500
1501                 data->device_id = device_id;
1502                 data->video = video;
1503                 data->dev = device;
1504
1505                 attribute = acpi_video_get_device_attr(video, device_id);
1506
1507                 if((attribute != NULL) && attribute->device_id_scheme) {
1508                         switch (attribute->display_type) {
1509                         case ACPI_VIDEO_DISPLAY_CRT:
1510                                 data->flags.crt = 1;
1511                                 break;
1512                         case ACPI_VIDEO_DISPLAY_TV:
1513                                 data->flags.tvout = 1;
1514                                 break;
1515                         case ACPI_VIDEO_DISPLAY_DVI:
1516                                 data->flags.dvi = 1;
1517                                 break;
1518                         case ACPI_VIDEO_DISPLAY_LCD:
1519                                 data->flags.lcd = 1;
1520                                 break;
1521                         default:
1522                                 data->flags.unknown = 1;
1523                                 break;
1524                         }
1525                         if(attribute->bios_can_detect)
1526                                 data->flags.bios = 1;
1527                 } else
1528                         data->flags.unknown = 1;
1529
1530                 acpi_video_device_bind(video, data);
1531                 acpi_video_device_find_cap(data);
1532
1533                 status = acpi_install_notify_handler(device->handle,
1534                                                      ACPI_DEVICE_NOTIFY,
1535                                                      acpi_video_device_notify,
1536                                                      data);
1537                 if (ACPI_FAILURE(status)) {
1538                         printk(KERN_ERR PREFIX
1539                                           "Error installing notify handler\n");
1540                         if(data->brightness)
1541                                 kfree(data->brightness->levels);
1542                         kfree(data->brightness);
1543                         kfree(data);
1544                         return -ENODEV;
1545                 }
1546
1547                 mutex_lock(&video->device_list_lock);
1548                 list_add_tail(&data->entry, &video->video_device_list);
1549                 mutex_unlock(&video->device_list_lock);
1550
1551                 acpi_video_device_add_fs(device);
1552
1553                 return 0;
1554         }
1555
1556         return -ENOENT;
1557 }
1558
1559 /*
1560  *  Arg:
1561  *      video   : video bus device
1562  *
1563  *  Return:
1564  *      none
1565  *
1566  *  Enumerate the video device list of the video bus,
1567  *  bind the ids with the corresponding video devices
1568  *  under the video bus.
1569  */
1570
1571 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1572 {
1573         struct acpi_video_device *dev;
1574
1575         mutex_lock(&video->device_list_lock);
1576
1577         list_for_each_entry(dev, &video->video_device_list, entry)
1578                 acpi_video_device_bind(video, dev);
1579
1580         mutex_unlock(&video->device_list_lock);
1581 }
1582
1583 /*
1584  *  Arg:
1585  *      video   : video bus device
1586  *      device  : video output device under the video
1587  *              bus
1588  *
1589  *  Return:
1590  *      none
1591  *
1592  *  Bind the ids with the corresponding video devices
1593  *  under the video bus.
1594  */
1595
1596 static void
1597 acpi_video_device_bind(struct acpi_video_bus *video,
1598                        struct acpi_video_device *device)
1599 {
1600         struct acpi_video_enumerated_device *ids;
1601         int i;
1602
1603         for (i = 0; i < video->attached_count; i++) {
1604                 ids = &video->attached_array[i];
1605                 if (device->device_id == (ids->value.int_val & 0xffff)) {
1606                         ids->bind_info = device;
1607                         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1608                 }
1609         }
1610 }
1611
1612 /*
1613  *  Arg:
1614  *      video   : video bus device
1615  *
1616  *  Return:
1617  *      < 0     : error
1618  *
1619  *  Call _DOD to enumerate all devices attached to display adapter
1620  *
1621  */
1622
1623 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1624 {
1625         int status;
1626         int count;
1627         int i;
1628         struct acpi_video_enumerated_device *active_list;
1629         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1630         union acpi_object *dod = NULL;
1631         union acpi_object *obj;
1632
1633         status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1634         if (!ACPI_SUCCESS(status)) {
1635                 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1636                 return status;
1637         }
1638
1639         dod = buffer.pointer;
1640         if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1641                 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1642                 status = -EFAULT;
1643                 goto out;
1644         }
1645
1646         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1647                           dod->package.count));
1648
1649         active_list = kcalloc(1 + dod->package.count,
1650                               sizeof(struct acpi_video_enumerated_device),
1651                               GFP_KERNEL);
1652         if (!active_list) {
1653                 status = -ENOMEM;
1654                 goto out;
1655         }
1656
1657         count = 0;
1658         for (i = 0; i < dod->package.count; i++) {
1659                 obj = &dod->package.elements[i];
1660
1661                 if (obj->type != ACPI_TYPE_INTEGER) {
1662                         printk(KERN_ERR PREFIX
1663                                 "Invalid _DOD data in element %d\n", i);
1664                         continue;
1665                 }
1666
1667                 active_list[count].value.int_val = obj->integer.value;
1668                 active_list[count].bind_info = NULL;
1669                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1670                                   (int)obj->integer.value));
1671                 count++;
1672         }
1673
1674         kfree(video->attached_array);
1675
1676         video->attached_array = active_list;
1677         video->attached_count = count;
1678
1679  out:
1680         kfree(buffer.pointer);
1681         return status;
1682 }
1683
1684 static int
1685 acpi_video_get_next_level(struct acpi_video_device *device,
1686                           u32 level_current, u32 event)
1687 {
1688         int min, max, min_above, max_below, i, l, delta = 255;
1689         max = max_below = 0;
1690         min = min_above = 255;
1691         /* Find closest level to level_current */
1692         for (i = 0; i < device->brightness->count; i++) {
1693                 l = device->brightness->levels[i];
1694                 if (abs(l - level_current) < abs(delta)) {
1695                         delta = l - level_current;
1696                         if (!delta)
1697                                 break;
1698                 }
1699         }
1700         /* Ajust level_current to closest available level */
1701         level_current += delta;
1702         for (i = 0; i < device->brightness->count; i++) {
1703                 l = device->brightness->levels[i];
1704                 if (l < min)
1705                         min = l;
1706                 if (l > max)
1707                         max = l;
1708                 if (l < min_above && l > level_current)
1709                         min_above = l;
1710                 if (l > max_below && l < level_current)
1711                         max_below = l;
1712         }
1713
1714         switch (event) {
1715         case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1716                 return (level_current < max) ? min_above : min;
1717         case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1718                 return (level_current < max) ? min_above : max;
1719         case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1720                 return (level_current > min) ? max_below : min;
1721         case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1722         case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1723                 return 0;
1724         default:
1725                 return level_current;
1726         }
1727 }
1728
1729 static void
1730 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1731 {
1732         unsigned long long level_current, level_next;
1733         if (!device->brightness)
1734                 return;
1735         acpi_video_device_lcd_get_level_current(device, &level_current);
1736         level_next = acpi_video_get_next_level(device, level_current, event);
1737         acpi_video_device_lcd_set_level(device, level_next);
1738 }
1739
1740 static int
1741 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1742                            struct acpi_device *device)
1743 {
1744         int status = 0;
1745         struct acpi_device *dev;
1746
1747         acpi_video_device_enumerate(video);
1748
1749         list_for_each_entry(dev, &device->children, node) {
1750
1751                 status = acpi_video_bus_get_one_device(dev, video);
1752                 if (ACPI_FAILURE(status)) {
1753                         printk(KERN_WARNING PREFIX
1754                                         "Cant attach device");
1755                         continue;
1756                 }
1757         }
1758         return status;
1759 }
1760
1761 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1762 {
1763         acpi_status status;
1764         struct acpi_video_bus *video;
1765
1766
1767         if (!device || !device->video)
1768                 return -ENOENT;
1769
1770         video = device->video;
1771
1772         acpi_video_device_remove_fs(device->dev);
1773
1774         status = acpi_remove_notify_handler(device->dev->handle,
1775                                             ACPI_DEVICE_NOTIFY,
1776                                             acpi_video_device_notify);
1777         backlight_device_unregister(device->backlight);
1778         if (device->cdev) {
1779                 sysfs_remove_link(&device->dev->dev.kobj,
1780                                   "thermal_cooling");
1781                 sysfs_remove_link(&device->cdev->device.kobj,
1782                                   "device");
1783                 thermal_cooling_device_unregister(device->cdev);
1784                 device->cdev = NULL;
1785         }
1786         video_output_unregister(device->output_dev);
1787
1788         return 0;
1789 }
1790
1791 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1792 {
1793         int status;
1794         struct acpi_video_device *dev, *next;
1795
1796         mutex_lock(&video->device_list_lock);
1797
1798         list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1799
1800                 status = acpi_video_bus_put_one_device(dev);
1801                 if (ACPI_FAILURE(status))
1802                         printk(KERN_WARNING PREFIX
1803                                "hhuuhhuu bug in acpi video driver.\n");
1804
1805                 if (dev->brightness) {
1806                         kfree(dev->brightness->levels);
1807                         kfree(dev->brightness);
1808                 }
1809                 list_del(&dev->entry);
1810                 kfree(dev);
1811         }
1812
1813         mutex_unlock(&video->device_list_lock);
1814
1815         return 0;
1816 }
1817
1818 /* acpi_video interface */
1819
1820 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1821 {
1822         return acpi_video_bus_DOS(video, 0, 0);
1823 }
1824
1825 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1826 {
1827         return acpi_video_bus_DOS(video, 0, 1);
1828 }
1829
1830 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1831 {
1832         struct acpi_video_bus *video = data;
1833         struct acpi_device *device = NULL;
1834         struct input_dev *input;
1835         int keycode;
1836
1837         if (!video)
1838                 return;
1839
1840         device = video->device;
1841         input = video->input;
1842
1843         switch (event) {
1844         case ACPI_VIDEO_NOTIFY_SWITCH:  /* User requested a switch,
1845                                          * most likely via hotkey. */
1846                 acpi_bus_generate_proc_event(device, event, 0);
1847                 keycode = KEY_SWITCHVIDEOMODE;
1848                 break;
1849
1850         case ACPI_VIDEO_NOTIFY_PROBE:   /* User plugged in or removed a video
1851                                          * connector. */
1852                 acpi_video_device_enumerate(video);
1853                 acpi_video_device_rebind(video);
1854                 acpi_bus_generate_proc_event(device, event, 0);
1855                 keycode = KEY_SWITCHVIDEOMODE;
1856                 break;
1857
1858         case ACPI_VIDEO_NOTIFY_CYCLE:   /* Cycle Display output hotkey pressed. */
1859                 acpi_bus_generate_proc_event(device, event, 0);
1860                 keycode = KEY_SWITCHVIDEOMODE;
1861                 break;
1862         case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:     /* Next Display output hotkey pressed. */
1863                 acpi_bus_generate_proc_event(device, event, 0);
1864                 keycode = KEY_VIDEO_NEXT;
1865                 break;
1866         case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:     /* previous Display output hotkey pressed. */
1867                 acpi_bus_generate_proc_event(device, event, 0);
1868                 keycode = KEY_VIDEO_PREV;
1869                 break;
1870
1871         default:
1872                 keycode = KEY_UNKNOWN;
1873                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1874                                   "Unsupported event [0x%x]\n", event));
1875                 break;
1876         }
1877
1878         acpi_notifier_call_chain(device, event, 0);
1879         input_report_key(input, keycode, 1);
1880         input_sync(input);
1881         input_report_key(input, keycode, 0);
1882         input_sync(input);
1883
1884         return;
1885 }
1886
1887 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1888 {
1889         struct acpi_video_device *video_device = data;
1890         struct acpi_device *device = NULL;
1891         struct acpi_video_bus *bus;
1892         struct input_dev *input;
1893         int keycode;
1894
1895         if (!video_device)
1896                 return;
1897
1898         device = video_device->dev;
1899         bus = video_device->video;
1900         input = bus->input;
1901
1902         switch (event) {
1903         case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:        /* Cycle brightness */
1904                 if (brightness_switch_enabled)
1905                         acpi_video_switch_brightness(video_device, event);
1906                 acpi_bus_generate_proc_event(device, event, 0);
1907                 keycode = KEY_BRIGHTNESS_CYCLE;
1908                 break;
1909         case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:  /* Increase brightness */
1910                 if (brightness_switch_enabled)
1911                         acpi_video_switch_brightness(video_device, event);
1912                 acpi_bus_generate_proc_event(device, event, 0);
1913                 keycode = KEY_BRIGHTNESSUP;
1914                 break;
1915         case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:  /* Decrease brightness */
1916                 if (brightness_switch_enabled)
1917                         acpi_video_switch_brightness(video_device, event);
1918                 acpi_bus_generate_proc_event(device, event, 0);
1919                 keycode = KEY_BRIGHTNESSDOWN;
1920                 break;
1921         case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1922                 if (brightness_switch_enabled)
1923                         acpi_video_switch_brightness(video_device, event);
1924                 acpi_bus_generate_proc_event(device, event, 0);
1925                 keycode = KEY_BRIGHTNESS_ZERO;
1926                 break;
1927         case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:     /* display device off */
1928                 if (brightness_switch_enabled)
1929                         acpi_video_switch_brightness(video_device, event);
1930                 acpi_bus_generate_proc_event(device, event, 0);
1931                 keycode = KEY_DISPLAY_OFF;
1932                 break;
1933         default:
1934                 keycode = KEY_UNKNOWN;
1935                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1936                                   "Unsupported event [0x%x]\n", event));
1937                 break;
1938         }
1939
1940         acpi_notifier_call_chain(device, event, 0);
1941         input_report_key(input, keycode, 1);
1942         input_sync(input);
1943         input_report_key(input, keycode, 0);
1944         input_sync(input);
1945
1946         return;
1947 }
1948
1949 static int instance;
1950 static int acpi_video_resume(struct acpi_device *device)
1951 {
1952         struct acpi_video_bus *video;
1953         struct acpi_video_device *video_device;
1954         int i;
1955
1956         if (!device || !acpi_driver_data(device))
1957                 return -EINVAL;
1958
1959         video = acpi_driver_data(device);
1960
1961         for (i = 0; i < video->attached_count; i++) {
1962                 video_device = video->attached_array[i].bind_info;
1963                 if (video_device && video_device->backlight)
1964                         acpi_video_set_brightness(video_device->backlight);
1965         }
1966         return AE_OK;
1967 }
1968
1969 static int acpi_video_bus_add(struct acpi_device *device)
1970 {
1971         acpi_status status;
1972         struct acpi_video_bus *video;
1973         struct input_dev *input;
1974         int error;
1975
1976         video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1977         if (!video)
1978                 return -ENOMEM;
1979
1980         /* a hack to fix the duplicate name "VID" problem on T61 */
1981         if (!strcmp(device->pnp.bus_id, "VID")) {
1982                 if (instance)
1983                         device->pnp.bus_id[3] = '0' + instance;
1984                 instance ++;
1985         }
1986
1987         video->device = device;
1988         strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1989         strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1990         device->driver_data = video;
1991
1992         acpi_video_bus_find_cap(video);
1993         error = acpi_video_bus_check(video);
1994         if (error)
1995                 goto err_free_video;
1996
1997         error = acpi_video_bus_add_fs(device);
1998         if (error)
1999                 goto err_free_video;
2000
2001         mutex_init(&video->device_list_lock);
2002         INIT_LIST_HEAD(&video->video_device_list);
2003
2004         acpi_video_bus_get_devices(video, device);
2005         acpi_video_bus_start_devices(video);
2006
2007         status = acpi_install_notify_handler(device->handle,
2008                                              ACPI_DEVICE_NOTIFY,
2009                                              acpi_video_bus_notify, video);
2010         if (ACPI_FAILURE(status)) {
2011                 printk(KERN_ERR PREFIX
2012                                   "Error installing notify handler\n");
2013                 error = -ENODEV;
2014                 goto err_stop_video;
2015         }
2016
2017         video->input = input = input_allocate_device();
2018         if (!input) {
2019                 error = -ENOMEM;
2020                 goto err_uninstall_notify;
2021         }
2022
2023         snprintf(video->phys, sizeof(video->phys),
2024                 "%s/video/input0", acpi_device_hid(video->device));
2025
2026         input->name = acpi_device_name(video->device);
2027         input->phys = video->phys;
2028         input->id.bustype = BUS_HOST;
2029         input->id.product = 0x06;
2030         input->dev.parent = &device->dev;
2031         input->evbit[0] = BIT(EV_KEY);
2032         set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2033         set_bit(KEY_VIDEO_NEXT, input->keybit);
2034         set_bit(KEY_VIDEO_PREV, input->keybit);
2035         set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2036         set_bit(KEY_BRIGHTNESSUP, input->keybit);
2037         set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2038         set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2039         set_bit(KEY_DISPLAY_OFF, input->keybit);
2040         set_bit(KEY_UNKNOWN, input->keybit);
2041
2042         error = input_register_device(input);
2043         if (error)
2044                 goto err_free_input_dev;
2045
2046         printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s  rom: %s  post: %s)\n",
2047                ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2048                video->flags.multihead ? "yes" : "no",
2049                video->flags.rom ? "yes" : "no",
2050                video->flags.post ? "yes" : "no");
2051
2052         return 0;
2053
2054  err_free_input_dev:
2055         input_free_device(input);
2056  err_uninstall_notify:
2057         acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2058                                    acpi_video_bus_notify);
2059  err_stop_video:
2060         acpi_video_bus_stop_devices(video);
2061         acpi_video_bus_put_devices(video);
2062         kfree(video->attached_array);
2063         acpi_video_bus_remove_fs(device);
2064  err_free_video:
2065         kfree(video);
2066         device->driver_data = NULL;
2067
2068         return error;
2069 }
2070
2071 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2072 {
2073         acpi_status status = 0;
2074         struct acpi_video_bus *video = NULL;
2075
2076
2077         if (!device || !acpi_driver_data(device))
2078                 return -EINVAL;
2079
2080         video = acpi_driver_data(device);
2081
2082         acpi_video_bus_stop_devices(video);
2083
2084         status = acpi_remove_notify_handler(video->device->handle,
2085                                             ACPI_DEVICE_NOTIFY,
2086                                             acpi_video_bus_notify);
2087
2088         acpi_video_bus_put_devices(video);
2089         acpi_video_bus_remove_fs(device);
2090
2091         input_unregister_device(video->input);
2092         kfree(video->attached_array);
2093         kfree(video);
2094
2095         return 0;
2096 }
2097
2098 static int __init acpi_video_init(void)
2099 {
2100         int result = 0;
2101
2102
2103         /*
2104            acpi_dbg_level = 0xFFFFFFFF;
2105            acpi_dbg_layer = 0x08000000;
2106          */
2107
2108         acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2109         if (!acpi_video_dir)
2110                 return -ENODEV;
2111         acpi_video_dir->owner = THIS_MODULE;
2112
2113         result = acpi_bus_register_driver(&acpi_video_bus);
2114         if (result < 0) {
2115                 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2116                 return -ENODEV;
2117         }
2118
2119         return 0;
2120 }
2121
2122 static void __exit acpi_video_exit(void)
2123 {
2124
2125         acpi_bus_unregister_driver(&acpi_video_bus);
2126
2127         remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2128
2129         return;
2130 }
2131
2132 module_init(acpi_video_init);
2133 module_exit(acpi_video_exit);