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 ACPI_VIDEO_HEAD_INVALID         (~0u - 1)
  61 #define ACPI_VIDEO_HEAD_END             (~0u)
  62 #define MAX_NAME_LEN    20
  63
  64 #define ACPI_VIDEO_DISPLAY_CRT  1
  65 #define ACPI_VIDEO_DISPLAY_TV   2
  66 #define ACPI_VIDEO_DISPLAY_DVI  3
  67 #define ACPI_VIDEO_DISPLAY_LCD  4
  68
  69 #define _COMPONENT              ACPI_VIDEO_COMPONENT
  70 ACPI_MODULE_NAME("video");
  71
  72 MODULE_AUTHOR("Bruno Ducrot");
  73 MODULE_DESCRIPTION("ACPI Video Driver");
  74 MODULE_LICENSE("GPL");
  75
  76 static int acpi_video_bus_add(struct acpi_device *device);
  77 static int acpi_video_bus_remove(struct acpi_device *device, int type);
  78
  79 static const struct acpi_device_id video_device_ids[] = {
  80         {ACPI_VIDEO_HID, 0},
  81         {"", 0},
  82 };
  83 MODULE_DEVICE_TABLE(acpi, video_device_ids);
  84
  85 static struct acpi_driver acpi_video_bus = {
  86         .name = "video",
  87         .class = ACPI_VIDEO_CLASS,
  88         .ids = video_device_ids,
  89         .ops = {
  90                 .add = acpi_video_bus_add,
  91                 .remove = acpi_video_bus_remove,
  92                 },
  93 };
  94
  95 struct acpi_video_bus_flags {
  96         u8 multihead:1;         /* can switch video heads */
  97         u8 rom:1;               /* can retrieve a video rom */
  98         u8 post:1;              /* can configure the head to */
  99         u8 reserved:5;
 100 };
 101
 102 struct acpi_video_bus_cap {
 103         u8 _DOS:1;              /*Enable/Disable output switching */
 104         u8 _DOD:1;              /*Enumerate all devices attached to display adapter */
 105         u8 _ROM:1;              /*Get ROM Data */
 106         u8 _GPD:1;              /*Get POST Device */
 107         u8 _SPD:1;              /*Set POST Device */
 108         u8 _VPO:1;              /*Video POST Options */
 109         u8 reserved:2;
 110 };
 111
 112 struct acpi_video_device_attrib {
 113         u32 display_index:4;    /* A zero-based instance of the Display */
 114         u32 display_port_attachment:4;  /*This field differentiates the display type */
 115         u32 display_type:4;     /*Describe the specific type in use */
 116         u32 vendor_specific:4;  /*Chipset Vendor Specific */
 117         u32 bios_can_detect:1;  /*BIOS can detect the device */
 118         u32 depend_on_vga:1;    /*Non-VGA output device whose power is related to
 119                                    the VGA device. */
 120         u32 pipe_id:3;          /*For VGA multiple-head devices. */
 121         u32 reserved:10;        /*Must be 0 */
 122         u32 device_id_scheme:1; /*Device ID Scheme */
 123 };
 124
 125 struct acpi_video_enumerated_device {
 126         union {
 127                 u32 int_val;
 128                 struct acpi_video_device_attrib attrib;
 129         } value;
 130         struct acpi_video_device *bind_info;
 131 };
 132
 133 struct acpi_video_bus {
 134         struct acpi_device *device;
 135         u8 dos_setting;
 136         struct acpi_video_enumerated_device *attached_array;
 137         u8 attached_count;
 138         struct acpi_video_bus_cap cap;
 139         struct acpi_video_bus_flags flags;
 140         struct list_head video_device_list;
 141         struct mutex device_list_lock;  /* protects video_device_list */
 142         struct proc_dir_entry *dir;
 143         struct input_dev *input;
 144         char phys[32];  /* for input device */
 145 };
 146
 147 struct acpi_video_device_flags {
 148         u8 crt:1;
 149         u8 lcd:1;
 150         u8 tvout:1;
 151         u8 dvi:1;
 152         u8 bios:1;
 153         u8 unknown:1;
 154         u8 reserved:2;
 155 };
 156
 157 struct acpi_video_device_cap {
 158         u8 _ADR:1;              /*Return the unique ID */
 159         u8 _BCL:1;              /*Query list of brightness control levels supported */
 160         u8 _BCM:1;              /*Set the brightness level */
 161         u8 _BQC:1;              /* Get current brightness level */
 162         u8 _DDC:1;              /*Return the EDID for this device */
 163         u8 _DCS:1;              /*Return status of output device */
 164         u8 _DGS:1;              /*Query graphics state */
 165         u8 _DSS:1;              /*Device state set */
 166 };
 167
 168 struct acpi_video_device_brightness {
 169         int curr;
 170         int count;
 171         int *levels;
 172 };
 173
 174 struct acpi_video_device {
 175         unsigned long device_id;
 176         struct acpi_video_device_flags flags;
 177         struct acpi_video_device_cap cap;
 178         struct list_head entry;
 179         struct acpi_video_bus *video;
 180         struct acpi_device *dev;
 181         struct acpi_video_device_brightness *brightness;
 182         struct backlight_device *backlight;
 183         struct thermal_cooling_device *cdev;
 184         struct output_device *output_dev;
 185 };
 186
 187 /* bus */
 188 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
 189 static struct file_operations acpi_video_bus_info_fops = {
 190         .open = acpi_video_bus_info_open_fs,
 191         .read = seq_read,
 192         .llseek = seq_lseek,
 193         .release = single_release,
 194 };
 195
 196 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
 197 static struct file_operations acpi_video_bus_ROM_fops = {
 198         .open = acpi_video_bus_ROM_open_fs,
 199         .read = seq_read,
 200         .llseek = seq_lseek,
 201         .release = single_release,
 202 };
 203
 204 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
 205                                             struct file *file);
 206 static struct file_operations acpi_video_bus_POST_info_fops = {
 207         .open = acpi_video_bus_POST_info_open_fs,
 208         .read = seq_read,
 209         .llseek = seq_lseek,
 210         .release = single_release,
 211 };
 212
 213 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
 214 static struct file_operations acpi_video_bus_POST_fops = {
 215         .open = acpi_video_bus_POST_open_fs,
 216         .read = seq_read,
 217         .llseek = seq_lseek,
 218         .release = single_release,
 219 };
 220
 221 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
 222 static struct file_operations acpi_video_bus_DOS_fops = {
 223         .open = acpi_video_bus_DOS_open_fs,
 224         .read = seq_read,
 225         .llseek = seq_lseek,
 226         .release = single_release,
 227 };
 228
 229 /* device */
 230 static int acpi_video_device_info_open_fs(struct inode *inode,
 231                                           struct file *file);
 232 static struct file_operations acpi_video_device_info_fops = {
 233         .open = acpi_video_device_info_open_fs,
 234         .read = seq_read,
 235         .llseek = seq_lseek,
 236         .release = single_release,
 237 };
 238
 239 static int acpi_video_device_state_open_fs(struct inode *inode,
 240                                            struct file *file);
 241 static struct file_operations acpi_video_device_state_fops = {
 242         .open = acpi_video_device_state_open_fs,
 243         .read = seq_read,
 244         .llseek = seq_lseek,
 245         .release = single_release,
 246 };
 247
 248 static int acpi_video_device_brightness_open_fs(struct inode *inode,
 249                                                 struct file *file);
 250 static struct file_operations acpi_video_device_brightness_fops = {
 251         .open = acpi_video_device_brightness_open_fs,
 252         .read = seq_read,
 253         .llseek = seq_lseek,
 254         .release = single_release,
 255 };
 256
 257 static int acpi_video_device_EDID_open_fs(struct inode *inode,
 258                                           struct file *file);
 259 static struct file_operations acpi_video_device_EDID_fops = {
 260         .open = acpi_video_device_EDID_open_fs,
 261         .read = seq_read,
 262         .llseek = seq_lseek,
 263         .release = single_release,
 264 };
 265
 266 static char device_decode[][30] = {
 267         "motherboard VGA device",
 268         "PCI VGA device",
 269         "AGP VGA device",
 270         "UNKNOWN",
 271 };
 272
 273 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
 274 static void acpi_video_device_rebind(struct acpi_video_bus *video);
 275 static void acpi_video_device_bind(struct acpi_video_bus *video,
 276                                    struct acpi_video_device *device);
 277 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
 278 static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
 279 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
 280                         int level);
 281 static int acpi_video_device_lcd_get_level_current(
 282                         struct acpi_video_device *device,
 283                         unsigned long *level);
 284 static int acpi_video_get_next_level(struct acpi_video_device *device,
 285                                      u32 level_current, u32 event);
 286 static void acpi_video_switch_brightness(struct acpi_video_device *device,
 287                                          int event);
 288 static int acpi_video_device_get_state(struct acpi_video_device *device,
 289                             unsigned long *state);
 290 static int acpi_video_output_get(struct output_device *od);
 291 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
 292
 293 /*backlight device sysfs support*/
 294 static int acpi_video_get_brightness(struct backlight_device *bd)
 295 {
 296         unsigned long cur_level;
 297         struct acpi_video_device *vd =
 298                 (struct acpi_video_device *)bl_get_data(bd);
 299         acpi_video_device_lcd_get_level_current(vd, &cur_level);
 300         return (int) cur_level;
 301 }
 302
 303 static int acpi_video_set_brightness(struct backlight_device *bd)
 304 {
 305         int request_level = bd->props.brightness;
 306         struct acpi_video_device *vd =
 307                 (struct acpi_video_device *)bl_get_data(bd);
 308         acpi_video_device_lcd_set_level(vd, request_level);
 309         return 0;
 310 }
 311
 312 static struct backlight_ops acpi_backlight_ops = {
 313         .get_brightness = acpi_video_get_brightness,
 314         .update_status  = acpi_video_set_brightness,
 315 };
 316
 317 /*video output device sysfs support*/
 318 static int acpi_video_output_get(struct output_device *od)
 319 {
 320         unsigned long state;
 321         struct acpi_video_device *vd =
 322                 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
 323         acpi_video_device_get_state(vd, &state);
 324         return (int)state;
 325 }
 326
 327 static int acpi_video_output_set(struct output_device *od)
 328 {
 329         unsigned long state = od->request_state;
 330         struct acpi_video_device *vd=
 331                 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
 332         return acpi_video_device_set_state(vd, state);
 333 }
 334
 335 static struct output_properties acpi_output_properties = {
 336         .set_state = acpi_video_output_set,
 337         .get_status = acpi_video_output_get,
 338 };
 339
 340
 341 /* thermal cooling device callbacks */
 342 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
 343 {
 344         struct acpi_device *device = cdev->devdata;
 345         struct acpi_video_device *video = acpi_driver_data(device);
 346
 347         return sprintf(buf, "%d\n", video->brightness->count - 3);
 348 }
 349
 350 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
 351 {
 352         struct acpi_device *device = cdev->devdata;
 353         struct acpi_video_device *video = acpi_driver_data(device);
 354         unsigned long level;
 355         int state;
 356
 357         acpi_video_device_lcd_get_level_current(video, &level);
 358         for (state = 2; state < video->brightness->count; state++)
 359                 if (level == video->brightness->levels[state])
 360                         return sprintf(buf, "%d\n",
 361                                        video->brightness->count - state - 1);
 362
 363         return -EINVAL;
 364 }
 365
 366 static int
 367 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
 368 {
 369         struct acpi_device *device = cdev->devdata;
 370         struct acpi_video_device *video = acpi_driver_data(device);
 371         int level;
 372
 373         if ( state >= video->brightness->count - 2)
 374                 return -EINVAL;
 375
 376         state = video->brightness->count - state;
 377         level = video->brightness->levels[state -1];
 378         return acpi_video_device_lcd_set_level(video, level);
 379 }
 380
 381 static struct thermal_cooling_device_ops video_cooling_ops = {
 382         .get_max_state = video_get_max_state,
 383         .get_cur_state = video_get_cur_state,
 384         .set_cur_state = video_set_cur_state,
 385 };
 386
 387 /* --------------------------------------------------------------------------
 388                                Video Management
 389    -------------------------------------------------------------------------- */
 390
 391 /* device */
 392
 393 static int
 394 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
 395 {
 396         int status;
 397
 398         status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
 399
 400         return status;
 401 }
 402
 403 static int
 404 acpi_video_device_get_state(struct acpi_video_device *device,
 405                             unsigned long *state)
 406 {
 407         int status;
 408
 409         status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
 410
 411         return status;
 412 }
 413
 414 static int
 415 acpi_video_device_set_state(struct acpi_video_device *device, int state)
 416 {
 417         int status;
 418         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 419         struct acpi_object_list args = { 1, &arg0 };
 420         unsigned long ret;
 421
 422
 423         arg0.integer.value = state;
 424         status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
 425
 426         return status;
 427 }
 428
 429 static int
 430 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
 431                                    union acpi_object **levels)
 432 {
 433         int status;
 434         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 435         union acpi_object *obj;
 436
 437
 438         *levels = NULL;
 439
 440         status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
 441         if (!ACPI_SUCCESS(status))
 442                 return status;
 443         obj = (union acpi_object *)buffer.pointer;
 444         if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 445                 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
 446                 status = -EFAULT;
 447                 goto err;
 448         }
 449
 450         *levels = obj;
 451
 452         return 0;
 453
 454       err:
 455         kfree(buffer.pointer);
 456
 457         return status;
 458 }
 459
 460 static int
 461 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
 462 {
 463         int status = AE_OK;
 464         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 465         struct acpi_object_list args = { 1, &arg0 };
 466
 467
 468         arg0.integer.value = level;
 469
 470         if (device->cap._BCM)
 471                 status = acpi_evaluate_object(device->dev->handle, "_BCM",
 472                                               &args, NULL);
 473         device->brightness->curr = level;
 474         return status;
 475 }
 476
 477 static int
 478 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
 479                                         unsigned long *level)
 480 {
 481         if (device->cap._BQC)
 482                 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
 483                                              level);
 484         *level = device->brightness->curr;
 485         return AE_OK;
 486 }
 487
 488 static int
 489 acpi_video_device_EDID(struct acpi_video_device *device,
 490                        union acpi_object **edid, ssize_t length)
 491 {
 492         int status;
 493         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 494         union acpi_object *obj;
 495         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 496         struct acpi_object_list args = { 1, &arg0 };
 497
 498
 499         *edid = NULL;
 500
 501         if (!device)
 502                 return -ENODEV;
 503         if (length == 128)
 504                 arg0.integer.value = 1;
 505         else if (length == 256)
 506                 arg0.integer.value = 2;
 507         else
 508                 return -EINVAL;
 509
 510         status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
 511         if (ACPI_FAILURE(status))
 512                 return -ENODEV;
 513
 514         obj = buffer.pointer;
 515
 516         if (obj && obj->type == ACPI_TYPE_BUFFER)
 517                 *edid = obj;
 518         else {
 519                 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
 520                 status = -EFAULT;
 521                 kfree(obj);
 522         }
 523
 524         return status;
 525 }
 526
 527 /* bus */
 528
 529 static int
 530 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
 531 {
 532         int status;
 533         unsigned long tmp;
 534         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 535         struct acpi_object_list args = { 1, &arg0 };
 536
 537
 538         arg0.integer.value = option;
 539
 540         status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
 541         if (ACPI_SUCCESS(status))
 542                 status = tmp ? (-EINVAL) : (AE_OK);
 543
 544         return status;
 545 }
 546
 547 static int
 548 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
 549 {
 550         int status;
 551
 552         status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
 553
 554         return status;
 555 }
 556
 557 static int
 558 acpi_video_bus_POST_options(struct acpi_video_bus *video,
 559                             unsigned long *options)
 560 {
 561         int status;
 562
 563         status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
 564         *options &= 3;
 565
 566         return status;
 567 }
 568
 569 /*
 570  *  Arg:
 571  *      video           : video bus device pointer
 572  *      bios_flag       :
 573  *              0.      The system BIOS should NOT automatically switch(toggle)
 574  *                      the active display output.
 575  *              1.      The system BIOS should automatically switch (toggle) the
 576  *                      active display output. No switch event.
 577  *              2.      The _DGS value should be locked.
 578  *              3.      The system BIOS should not automatically switch (toggle) the
 579  *                      active display output, but instead generate the display switch
 580  *                      event notify code.
 581  *      lcd_flag        :
 582  *              0.      The system BIOS should automatically control the brightness level
 583  *                      of the LCD when the power changes from AC to DC
 584  *              1.      The system BIOS should NOT automatically control the brightness
 585  *                      level of the LCD when the power changes from AC to DC.
 586  * Return Value:
 587  *              -1      wrong arg.
 588  */
 589
 590 static int
 591 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
 592 {
 593         acpi_integer status = 0;
 594         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 595         struct acpi_object_list args = { 1, &arg0 };
 596
 597
 598         if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
 599                 status = -1;
 600                 goto Failed;
 601         }
 602         arg0.integer.value = (lcd_flag << 2) | bios_flag;
 603         video->dos_setting = arg0.integer.value;
 604         acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
 605
 606       Failed:
 607         return status;
 608 }
 609
 610 /*
 611  *  Arg:
 612  *      device  : video output device (LCD, CRT, ..)
 613  *
 614  *  Return Value:
 615  *      None
 616  *
 617  *  Find out all required AML methods defined under the output
 618  *  device.
 619  */
 620
 621 static void acpi_video_device_find_cap(struct acpi_video_device *device)
 622 {
 623         acpi_handle h_dummy1;
 624         int i;
 625         u32 max_level = 0;
 626         union acpi_object *obj = NULL;
 627         struct acpi_video_device_brightness *br = NULL;
 628
 629
 630         memset(&device->cap, 0, sizeof(device->cap));
 631
 632         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
 633                 device->cap._ADR = 1;
 634         }
 635         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
 636                 device->cap._BCL = 1;
 637         }
 638         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
 639                 device->cap._BCM = 1;
 640         }
 641         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
 642                 device->cap._BQC = 1;
 643         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
 644                 device->cap._DDC = 1;
 645         }
 646         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
 647                 device->cap._DCS = 1;
 648         }
 649         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
 650                 device->cap._DGS = 1;
 651         }
 652         if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
 653                 device->cap._DSS = 1;
 654         }
 655
 656         if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
 657
 658                 if (obj->package.count >= 2) {
 659                         int count = 0;
 660                         union acpi_object *o;
 661
 662                         br = kzalloc(sizeof(*br), GFP_KERNEL);
 663                         if (!br) {
 664                                 printk(KERN_ERR "can't allocate memory\n");
 665                         } else {
 666                                 br->levels = kmalloc(obj->package.count *
 667                                                      sizeof *(br->levels), GFP_KERNEL);
 668                                 if (!br->levels)
 669                                         goto out;
 670
 671                                 for (i = 0; i < obj->package.count; i++) {
 672                                         o = (union acpi_object *)&obj->package.
 673                                             elements[i];
 674                                         if (o->type != ACPI_TYPE_INTEGER) {
 675                                                 printk(KERN_ERR PREFIX "Invalid data\n");
 676                                                 continue;
 677                                         }
 678                                         br->levels[count] = (u32) o->integer.value;
 679
 680                                         if (br->levels[count] > max_level)
 681                                                 max_level = br->levels[count];
 682                                         count++;
 683                                 }
 684                               out:
 685                                 if (count < 2) {
 686                                         kfree(br->levels);
 687                                         kfree(br);
 688                                 } else {
 689                                         br->count = count;
 690                                         device->brightness = br;
 691                                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 692                                                           "found %d brightness levels\n",
 693                                                           count));
 694                                 }
 695                         }
 696                 }
 697
 698         } else {
 699                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
 700         }
 701
 702         kfree(obj);
 703
 704         if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
 705                 unsigned long tmp;
 706                 int result;
 707                 static int count = 0;
 708                 char *name;
 709                 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
 710                 if (!name)
 711                         return;
 712
 713                 sprintf(name, "acpi_video%d", count++);
 714                 acpi_video_device_lcd_get_level_current(device, &tmp);
 715                 device->backlight = backlight_device_register(name,
 716                         NULL, device, &acpi_backlight_ops);
 717                 device->backlight->props.max_brightness = max_level;
 718                 device->backlight->props.brightness = (int)tmp;
 719                 backlight_update_status(device->backlight);
 720                 kfree(name);
 721
 722                 device->cdev = thermal_cooling_device_register("LCD",
 723                                         device->dev, &video_cooling_ops);
 724                 if (device->cdev) {
 725                         printk(KERN_INFO PREFIX
 726                                 "%s is registered as cooling_device%d\n",
 727                                 device->dev->dev.bus_id, device->cdev->id);
 728                         result = sysfs_create_link(&device->dev->dev.kobj,
 729                                           &device->cdev->device.kobj,
 730                                           "thermal_cooling");
 731                         if (result)
 732                                 printk(KERN_ERR PREFIX "Create sysfs link\n");
 733                         result = sysfs_create_link(&device->cdev->device.kobj,
 734                                           &device->dev->dev.kobj,
 735                                           "device");
 736                         if (result)
 737                                 printk(KERN_ERR PREFIX "Create sysfs link\n");
 738                 }
 739         }
 740         if (device->cap._DCS && device->cap._DSS){
 741                 static int count = 0;
 742                 char *name;
 743                 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
 744                 if (!name)
 745                         return;
 746                 sprintf(name, "acpi_video%d", count++);
 747                 device->output_dev = video_output_register(name,
 748                                 NULL, device, &acpi_output_properties);
 749                 kfree(name);
 750         }
 751         return;
 752 }
 753
 754 /*
 755  *  Arg:
 756  *      device  : video output device (VGA)
 757  *
 758  *  Return Value:
 759  *      None
 760  *
 761  *  Find out all required AML methods defined under the video bus device.
 762  */
 763
 764 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
 765 {
 766         acpi_handle h_dummy1;
 767
 768         memset(&video->cap, 0, sizeof(video->cap));
 769         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
 770                 video->cap._DOS = 1;
 771         }
 772         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
 773                 video->cap._DOD = 1;
 774         }
 775         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
 776                 video->cap._ROM = 1;
 777         }
 778         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
 779                 video->cap._GPD = 1;
 780         }
 781         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
 782                 video->cap._SPD = 1;
 783         }
 784         if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
 785                 video->cap._VPO = 1;
 786         }
 787 }
 788
 789 /*
 790  * Check whether the video bus device has required AML method to
 791  * support the desired features
 792  */
 793
 794 static int acpi_video_bus_check(struct acpi_video_bus *video)
 795 {
 796         acpi_status status = -ENOENT;
 797
 798
 799         if (!video)
 800                 return -EINVAL;
 801
 802         /* Since there is no HID, CID and so on for VGA driver, we have
 803          * to check well known required nodes.
 804          */
 805
 806         /* Does this device support video switching? */
 807         if (video->cap._DOS) {
 808                 video->flags.multihead = 1;
 809                 status = 0;
 810         }
 811
 812         /* Does this device support retrieving a video ROM? */
 813         if (video->cap._ROM) {
 814                 video->flags.rom = 1;
 815                 status = 0;
 816         }
 817
 818         /* Does this device support configuring which video device to POST? */
 819         if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
 820                 video->flags.post = 1;
 821                 status = 0;
 822         }
 823
 824         return status;
 825 }
 826
 827 /* --------------------------------------------------------------------------
 828                               FS Interface (/proc)
 829    -------------------------------------------------------------------------- */
 830
 831 static struct proc_dir_entry *acpi_video_dir;
 832
 833 /* video devices */
 834
 835 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
 836 {
 837         struct acpi_video_device *dev = seq->private;
 838
 839
 840         if (!dev)
 841                 goto end;
 842
 843         seq_printf(seq, "device_id:    0x%04x\n", (u32) dev->device_id);
 844         seq_printf(seq, "type:         ");
 845         if (dev->flags.crt)
 846                 seq_printf(seq, "CRT\n");
 847         else if (dev->flags.lcd)
 848                 seq_printf(seq, "LCD\n");
 849         else if (dev->flags.tvout)
 850                 seq_printf(seq, "TVOUT\n");
 851         else if (dev->flags.dvi)
 852                 seq_printf(seq, "DVI\n");
 853         else
 854                 seq_printf(seq, "UNKNOWN\n");
 855
 856         seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
 857
 858       end:
 859         return 0;
 860 }
 861
 862 static int
 863 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
 864 {
 865         return single_open(file, acpi_video_device_info_seq_show,
 866                            PDE(inode)->data);
 867 }
 868
 869 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
 870 {
 871         int status;
 872         struct acpi_video_device *dev = seq->private;
 873         unsigned long state;
 874
 875
 876         if (!dev)
 877                 goto end;
 878
 879         status = acpi_video_device_get_state(dev, &state);
 880         seq_printf(seq, "state:     ");
 881         if (ACPI_SUCCESS(status))
 882                 seq_printf(seq, "0x%02lx\n", state);
 883         else
 884                 seq_printf(seq, "<not supported>\n");
 885
 886         status = acpi_video_device_query(dev, &state);
 887         seq_printf(seq, "query:     ");
 888         if (ACPI_SUCCESS(status))
 889                 seq_printf(seq, "0x%02lx\n", state);
 890         else
 891                 seq_printf(seq, "<not supported>\n");
 892
 893       end:
 894         return 0;
 895 }
 896
 897 static int
 898 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
 899 {
 900         return single_open(file, acpi_video_device_state_seq_show,
 901                            PDE(inode)->data);
 902 }
 903
 904 static ssize_t
 905 acpi_video_device_write_state(struct file *file,
 906                               const char __user * buffer,
 907                               size_t count, loff_t * data)
 908 {
 909         int status;
 910         struct seq_file *m = file->private_data;
 911         struct acpi_video_device *dev = m->private;
 912         char str[12] = { 0 };
 913         u32 state = 0;
 914
 915
 916         if (!dev || count + 1 > sizeof str)
 917                 return -EINVAL;
 918
 919         if (copy_from_user(str, buffer, count))
 920                 return -EFAULT;
 921
 922         str[count] = 0;
 923         state = simple_strtoul(str, NULL, 0);
 924         state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
 925
 926         status = acpi_video_device_set_state(dev, state);
 927
 928         if (status)
 929                 return -EFAULT;
 930
 931         return count;
 932 }
 933
 934 static int
 935 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
 936 {
 937         struct acpi_video_device *dev = seq->private;
 938         int i;
 939
 940
 941         if (!dev || !dev->brightness) {
 942                 seq_printf(seq, "<not supported>\n");
 943                 return 0;
 944         }
 945
 946         seq_printf(seq, "levels: ");
 947         for (i = 0; i < dev->brightness->count; i++)
 948                 seq_printf(seq, " %d", dev->brightness->levels[i]);
 949         seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
 950
 951         return 0;
 952 }
 953
 954 static int
 955 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
 956 {
 957         return single_open(file, acpi_video_device_brightness_seq_show,
 958                            PDE(inode)->data);
 959 }
 960
 961 static ssize_t
 962 acpi_video_device_write_brightness(struct file *file,
 963                                    const char __user * buffer,
 964                                    size_t count, loff_t * data)
 965 {
 966         struct seq_file *m = file->private_data;
 967         struct acpi_video_device *dev = m->private;
 968         char str[5] = { 0 };
 969         unsigned int level = 0;
 970         int i;
 971
 972
 973         if (!dev || !dev->brightness || count + 1 > sizeof str)
 974                 return -EINVAL;
 975
 976         if (copy_from_user(str, buffer, count))
 977                 return -EFAULT;
 978
 979         str[count] = 0;
 980         level = simple_strtoul(str, NULL, 0);
 981
 982         if (level > 100)
 983                 return -EFAULT;
 984
 985         /* validate through the list of available levels */
 986         for (i = 0; i < dev->brightness->count; i++)
 987                 if (level == dev->brightness->levels[i]) {
 988                         if (ACPI_SUCCESS
 989                             (acpi_video_device_lcd_set_level(dev, level)))
 990                                 dev->brightness->curr = level;
 991                         break;
 992                 }
 993
 994         return count;
 995 }
 996
 997 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
 998 {
 999         struct acpi_video_device *dev = seq->private;
1000         int status;
1001         int i;
1002         union acpi_object *edid = NULL;
1003
1004
1005         if (!dev)
1006                 goto out;
1007
1008         status = acpi_video_device_EDID(dev, &edid, 128);
1009         if (ACPI_FAILURE(status)) {
1010                 status = acpi_video_device_EDID(dev, &edid, 256);
1011         }
1012
1013         if (ACPI_FAILURE(status)) {
1014                 goto out;
1015         }
1016
1017         if (edid && edid->type == ACPI_TYPE_BUFFER) {
1018                 for (i = 0; i < edid->buffer.length; i++)
1019                         seq_putc(seq, edid->buffer.pointer[i]);
1020         }
1021
1022       out:
1023         if (!edid)
1024                 seq_printf(seq, "<not supported>\n");
1025         else
1026                 kfree(edid);
1027
1028         return 0;
1029 }
1030
1031 static int
1032 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1033 {
1034         return single_open(file, acpi_video_device_EDID_seq_show,
1035                            PDE(inode)->data);
1036 }
1037
1038 static int acpi_video_device_add_fs(struct acpi_device *device)
1039 {
1040         struct proc_dir_entry *entry = NULL;
1041         struct acpi_video_device *vid_dev;
1042
1043
1044         if (!device)
1045                 return -ENODEV;
1046
1047         vid_dev = acpi_driver_data(device);
1048         if (!vid_dev)
1049                 return -ENODEV;
1050
1051         if (!acpi_device_dir(device)) {
1052                 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1053                                                      vid_dev->video->dir);
1054                 if (!acpi_device_dir(device))
1055                         return -ENODEV;
1056                 acpi_device_dir(device)->owner = THIS_MODULE;
1057         }
1058
1059         /* 'info' [R] */
1060         entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1061         if (!entry)
1062                 return -ENODEV;
1063         else {
1064                 entry->proc_fops = &acpi_video_device_info_fops;
1065                 entry->data = acpi_driver_data(device);
1066                 entry->owner = THIS_MODULE;
1067         }
1068
1069         /* 'state' [R/W] */
1070         entry =
1071             create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
1072                               acpi_device_dir(device));
1073         if (!entry)
1074                 return -ENODEV;
1075         else {
1076                 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1077                 entry->proc_fops = &acpi_video_device_state_fops;
1078                 entry->data = acpi_driver_data(device);
1079                 entry->owner = THIS_MODULE;
1080         }
1081
1082         /* 'brightness' [R/W] */
1083         entry =
1084             create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1085                               acpi_device_dir(device));
1086         if (!entry)
1087                 return -ENODEV;
1088         else {
1089                 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
1090                 entry->proc_fops = &acpi_video_device_brightness_fops;
1091                 entry->data = acpi_driver_data(device);
1092                 entry->owner = THIS_MODULE;
1093         }
1094
1095         /* 'EDID' [R] */
1096         entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
1097         if (!entry)
1098                 return -ENODEV;
1099         else {
1100                 entry->proc_fops = &acpi_video_device_EDID_fops;
1101                 entry->data = acpi_driver_data(device);
1102                 entry->owner = THIS_MODULE;
1103         }
1104
1105         return 0;
1106 }
1107
1108 static int acpi_video_device_remove_fs(struct acpi_device *device)
1109 {
1110         struct acpi_video_device *vid_dev;
1111
1112         vid_dev = acpi_driver_data(device);
1113         if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1114                 return -ENODEV;
1115
1116         if (acpi_device_dir(device)) {
1117                 remove_proc_entry("info", acpi_device_dir(device));
1118                 remove_proc_entry("state", acpi_device_dir(device));
1119                 remove_proc_entry("brightness", acpi_device_dir(device));
1120                 remove_proc_entry("EDID", acpi_device_dir(device));
1121                 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1122                 acpi_device_dir(device) = NULL;
1123         }
1124
1125         return 0;
1126 }
1127
1128 /* video bus */
1129 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1130 {
1131         struct acpi_video_bus *video = seq->private;
1132
1133
1134         if (!video)
1135                 goto end;
1136
1137         seq_printf(seq, "Switching heads:              %s\n",
1138                    video->flags.multihead ? "yes" : "no");
1139         seq_printf(seq, "Video ROM:                    %s\n",
1140                    video->flags.rom ? "yes" : "no");
1141         seq_printf(seq, "Device to be POSTed on boot:  %s\n",
1142                    video->flags.post ? "yes" : "no");
1143
1144       end:
1145         return 0;
1146 }
1147
1148 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1149 {
1150         return single_open(file, acpi_video_bus_info_seq_show,
1151                            PDE(inode)->data);
1152 }
1153
1154 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1155 {
1156         struct acpi_video_bus *video = seq->private;
1157
1158
1159         if (!video)
1160                 goto end;
1161
1162         printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1163         seq_printf(seq, "<TODO>\n");
1164
1165       end:
1166         return 0;
1167 }
1168
1169 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1170 {
1171         return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1172 }
1173
1174 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1175 {
1176         struct acpi_video_bus *video = seq->private;
1177         unsigned long options;
1178         int status;
1179
1180
1181         if (!video)
1182                 goto end;
1183
1184         status = acpi_video_bus_POST_options(video, &options);
1185         if (ACPI_SUCCESS(status)) {
1186                 if (!(options & 1)) {
1187                         printk(KERN_WARNING PREFIX
1188                                "The motherboard VGA device is not listed as a possible POST device.\n");
1189                         printk(KERN_WARNING PREFIX
1190                                "This indicates a BIOS bug. Please contact the manufacturer.\n");
1191                 }
1192                 printk("%lx\n", options);
1193                 seq_printf(seq, "can POST: <integrated video>");
1194                 if (options & 2)
1195                         seq_printf(seq, " <PCI video>");
1196                 if (options & 4)
1197                         seq_printf(seq, " <AGP video>");
1198                 seq_putc(seq, '\n');
1199         } else
1200                 seq_printf(seq, "<not supported>\n");
1201       end:
1202         return 0;
1203 }
1204
1205 static int
1206 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1207 {
1208         return single_open(file, acpi_video_bus_POST_info_seq_show,
1209                            PDE(inode)->data);
1210 }
1211
1212 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1213 {
1214         struct acpi_video_bus *video = seq->private;
1215         int status;
1216         unsigned long id;
1217
1218
1219         if (!video)
1220                 goto end;
1221
1222         status = acpi_video_bus_get_POST(video, &id);
1223         if (!ACPI_SUCCESS(status)) {
1224                 seq_printf(seq, "<not supported>\n");
1225                 goto end;
1226         }
1227         seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1228
1229       end:
1230         return 0;
1231 }
1232
1233 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1234 {
1235         struct acpi_video_bus *video = seq->private;
1236
1237
1238         seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1239
1240         return 0;
1241 }
1242
1243 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1244 {
1245         return single_open(file, acpi_video_bus_POST_seq_show,
1246                            PDE(inode)->data);
1247 }
1248
1249 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1250 {
1251         return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1252 }
1253
1254 static ssize_t
1255 acpi_video_bus_write_POST(struct file *file,
1256                           const char __user * buffer,
1257                           size_t count, loff_t * data)
1258 {
1259         int status;
1260         struct seq_file *m = file->private_data;
1261         struct acpi_video_bus *video = m->private;
1262         char str[12] = { 0 };
1263         unsigned long opt, options;
1264
1265
1266         if (!video || count + 1 > sizeof str)
1267                 return -EINVAL;
1268
1269         status = acpi_video_bus_POST_options(video, &options);
1270         if (!ACPI_SUCCESS(status))
1271                 return -EINVAL;
1272
1273         if (copy_from_user(str, buffer, count))
1274                 return -EFAULT;
1275
1276         str[count] = 0;
1277         opt = strtoul(str, NULL, 0);
1278         if (opt > 3)
1279                 return -EFAULT;
1280
1281         /* just in case an OEM 'forgot' the motherboard... */
1282         options |= 1;
1283
1284         if (options & (1ul << opt)) {
1285                 status = acpi_video_bus_set_POST(video, opt);
1286                 if (!ACPI_SUCCESS(status))
1287                         return -EFAULT;
1288
1289         }
1290
1291         return count;
1292 }
1293
1294 static ssize_t
1295 acpi_video_bus_write_DOS(struct file *file,
1296                          const char __user * buffer,
1297                          size_t count, loff_t * data)
1298 {
1299         int status;
1300         struct seq_file *m = file->private_data;
1301         struct acpi_video_bus *video = m->private;
1302         char str[12] = { 0 };
1303         unsigned long opt;
1304
1305
1306         if (!video || count + 1 > sizeof str)
1307                 return -EINVAL;
1308
1309         if (copy_from_user(str, buffer, count))
1310                 return -EFAULT;
1311
1312         str[count] = 0;
1313         opt = strtoul(str, NULL, 0);
1314         if (opt > 7)
1315                 return -EFAULT;
1316
1317         status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1318
1319         if (!ACPI_SUCCESS(status))
1320                 return -EFAULT;
1321
1322         return count;
1323 }
1324
1325 static int acpi_video_bus_add_fs(struct acpi_device *device)
1326 {
1327         struct proc_dir_entry *entry = NULL;
1328         struct acpi_video_bus *video;
1329
1330
1331         video = acpi_driver_data(device);
1332
1333         if (!acpi_device_dir(device)) {
1334                 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1335                                                      acpi_video_dir);
1336                 if (!acpi_device_dir(device))
1337                         return -ENODEV;
1338                 video->dir = acpi_device_dir(device);
1339                 acpi_device_dir(device)->owner = THIS_MODULE;
1340         }
1341
1342         /* 'info' [R] */
1343         entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1344         if (!entry)
1345                 return -ENODEV;
1346         else {
1347                 entry->proc_fops = &acpi_video_bus_info_fops;
1348                 entry->data = acpi_driver_data(device);
1349                 entry->owner = THIS_MODULE;
1350         }
1351
1352         /* 'ROM' [R] */
1353         entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1354         if (!entry)
1355                 return -ENODEV;
1356         else {
1357                 entry->proc_fops = &acpi_video_bus_ROM_fops;
1358                 entry->data = acpi_driver_data(device);
1359                 entry->owner = THIS_MODULE;
1360         }
1361
1362         /* 'POST_info' [R] */
1363         entry =
1364             create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1365         if (!entry)
1366                 return -ENODEV;
1367         else {
1368                 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1369                 entry->data = acpi_driver_data(device);
1370                 entry->owner = THIS_MODULE;
1371         }
1372
1373         /* 'POST' [R/W] */
1374         entry =
1375             create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1376                               acpi_device_dir(device));
1377         if (!entry)
1378                 return -ENODEV;
1379         else {
1380                 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1381                 entry->proc_fops = &acpi_video_bus_POST_fops;
1382                 entry->data = acpi_driver_data(device);
1383                 entry->owner = THIS_MODULE;
1384         }
1385
1386         /* 'DOS' [R/W] */
1387         entry =
1388             create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1389                               acpi_device_dir(device));
1390         if (!entry)
1391                 return -ENODEV;
1392         else {
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
1399         return 0;
1400 }
1401
1402 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1403 {
1404         struct acpi_video_bus *video;
1405
1406
1407         video = acpi_driver_data(device);
1408
1409         if (acpi_device_dir(device)) {
1410                 remove_proc_entry("info", acpi_device_dir(device));
1411                 remove_proc_entry("ROM", acpi_device_dir(device));
1412                 remove_proc_entry("POST_info", acpi_device_dir(device));
1413                 remove_proc_entry("POST", acpi_device_dir(device));
1414                 remove_proc_entry("DOS", acpi_device_dir(device));
1415                 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1416                 acpi_device_dir(device) = NULL;
1417         }
1418
1419         return 0;
1420 }
1421
1422 /* --------------------------------------------------------------------------
1423                                  Driver Interface
1424    -------------------------------------------------------------------------- */
1425
1426 /* device interface */
1427 static struct acpi_video_device_attrib*
1428 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1429 {
1430         int count;
1431
1432         for(count = 0; count < video->attached_count; count++)
1433                 if((video->attached_array[count].value.int_val & 0xffff) == device_id)
1434                         return &(video->attached_array[count].value.attrib);
1435         return NULL;
1436 }
1437
1438 static int
1439 acpi_video_bus_get_one_device(struct acpi_device *device,
1440                               struct acpi_video_bus *video)
1441 {
1442         unsigned long device_id;
1443         int status;
1444         struct acpi_video_device *data;
1445         struct acpi_video_device_attrib* attribute;
1446
1447         if (!device || !video)
1448                 return -EINVAL;
1449
1450         status =
1451             acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1452         if (ACPI_SUCCESS(status)) {
1453
1454                 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1455                 if (!data)
1456                         return -ENOMEM;
1457
1458                 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1459                 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1460                 acpi_driver_data(device) = data;
1461
1462                 data->device_id = device_id;
1463                 data->video = video;
1464                 data->dev = device;
1465
1466                 attribute = acpi_video_get_device_attr(video, device_id);
1467
1468                 if((attribute != NULL) && attribute->device_id_scheme) {
1469                         switch (attribute->display_type) {
1470                         case ACPI_VIDEO_DISPLAY_CRT:
1471                                 data->flags.crt = 1;
1472                                 break;
1473                         case ACPI_VIDEO_DISPLAY_TV:
1474                                 data->flags.tvout = 1;
1475                                 break;
1476                         case ACPI_VIDEO_DISPLAY_DVI:
1477                                 data->flags.dvi = 1;
1478                                 break;
1479                         case ACPI_VIDEO_DISPLAY_LCD:
1480                                 data->flags.lcd = 1;
1481                                 break;
1482                         default:
1483                                 data->flags.unknown = 1;
1484                                 break;
1485                         }
1486                         if(attribute->bios_can_detect)
1487                                 data->flags.bios = 1;
1488                 } else
1489                         data->flags.unknown = 1;
1490
1491                 acpi_video_device_bind(video, data);
1492                 acpi_video_device_find_cap(data);
1493
1494                 status = acpi_install_notify_handler(device->handle,
1495                                                      ACPI_DEVICE_NOTIFY,
1496                                                      acpi_video_device_notify,
1497                                                      data);
1498                 if (ACPI_FAILURE(status)) {
1499                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1500                                           "Error installing notify handler\n"));
1501                         if(data->brightness)
1502                                 kfree(data->brightness->levels);
1503                         kfree(data->brightness);
1504                         kfree(data);
1505                         return -ENODEV;
1506                 }
1507
1508                 mutex_lock(&video->device_list_lock);
1509                 list_add_tail(&data->entry, &video->video_device_list);
1510                 mutex_unlock(&video->device_list_lock);
1511
1512                 acpi_video_device_add_fs(device);
1513
1514                 return 0;
1515         }
1516
1517         return -ENOENT;
1518 }
1519
1520 /*
1521  *  Arg:
1522  *      video   : video bus device
1523  *
1524  *  Return:
1525  *      none
1526  *
1527  *  Enumerate the video device list of the video bus,
1528  *  bind the ids with the corresponding video devices
1529  *  under the video bus.
1530  */
1531
1532 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1533 {
1534         struct acpi_video_device *dev;
1535
1536         mutex_lock(&video->device_list_lock);
1537
1538         list_for_each_entry(dev, &video->video_device_list, entry)
1539                 acpi_video_device_bind(video, dev);
1540
1541         mutex_unlock(&video->device_list_lock);
1542 }
1543
1544 /*
1545  *  Arg:
1546  *      video   : video bus device
1547  *      device  : video output device under the video
1548  *              bus
1549  *
1550  *  Return:
1551  *      none
1552  *
1553  *  Bind the ids with the corresponding video devices
1554  *  under the video bus.
1555  */
1556
1557 static void
1558 acpi_video_device_bind(struct acpi_video_bus *video,
1559                        struct acpi_video_device *device)
1560 {
1561         int i;
1562
1563 #define IDS_VAL(i) video->attached_array[i].value.int_val
1564 #define IDS_BIND(i) video->attached_array[i].bind_info
1565
1566         for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1567              i < video->attached_count; i++) {
1568                 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1569                         IDS_BIND(i) = device;
1570                         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1571                 }
1572         }
1573 #undef IDS_VAL
1574 #undef IDS_BIND
1575 }
1576
1577 /*
1578  *  Arg:
1579  *      video   : video bus device
1580  *
1581  *  Return:
1582  *      < 0     : error
1583  *
1584  *  Call _DOD to enumerate all devices attached to display adapter
1585  *
1586  */
1587
1588 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1589 {
1590         int status;
1591         int count;
1592         int i;
1593         struct acpi_video_enumerated_device *active_device_list;
1594         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1595         union acpi_object *dod = NULL;
1596         union acpi_object *obj;
1597
1598         status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1599         if (!ACPI_SUCCESS(status)) {
1600                 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1601                 return status;
1602         }
1603
1604         dod = buffer.pointer;
1605         if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1606                 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1607                 status = -EFAULT;
1608                 goto out;
1609         }
1610
1611         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1612                           dod->package.count));
1613
1614         active_device_list = kmalloc((1 +
1615                                       dod->package.count) *
1616                                      sizeof(struct
1617                                             acpi_video_enumerated_device),
1618                                      GFP_KERNEL);
1619
1620         if (!active_device_list) {
1621                 status = -ENOMEM;
1622                 goto out;
1623         }
1624
1625         count = 0;
1626         for (i = 0; i < dod->package.count; i++) {
1627                 obj = &dod->package.elements[i];
1628
1629                 if (obj->type != ACPI_TYPE_INTEGER) {
1630                         printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1631                         active_device_list[i].value.int_val =
1632                             ACPI_VIDEO_HEAD_INVALID;
1633                 }
1634                 active_device_list[i].value.int_val = obj->integer.value;
1635                 active_device_list[i].bind_info = NULL;
1636                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1637                                   (int)obj->integer.value));
1638                 count++;
1639         }
1640         active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1641
1642         kfree(video->attached_array);
1643
1644         video->attached_array = active_device_list;
1645         video->attached_count = count;
1646       out:
1647         kfree(buffer.pointer);
1648         return status;
1649 }
1650
1651 /*
1652  *  Arg:
1653  *      video   : video bus device
1654  *      event   : notify event
1655  *
1656  *  Return:
1657  *      < 0     : error
1658  *
1659  *      1. Find out the current active output device.
1660  *      2. Identify the next output device to switch to.
1661  *      3. call _DSS to do actual switch.
1662  */
1663
1664 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1665 {
1666         struct list_head *node;
1667         struct acpi_video_device *dev = NULL;
1668         struct acpi_video_device *dev_next = NULL;
1669         struct acpi_video_device *dev_prev = NULL;
1670         unsigned long state;
1671         int status = 0;
1672
1673         mutex_lock(&video->device_list_lock);
1674
1675         list_for_each(node, &video->video_device_list) {
1676                 dev = container_of(node, struct acpi_video_device, entry);
1677                 status = acpi_video_device_get_state(dev, &state);
1678                 if (state & 0x2) {
1679                         dev_next = container_of(node->next,
1680                                         struct acpi_video_device, entry);
1681                         dev_prev = container_of(node->prev,
1682                                         struct acpi_video_device, entry);
1683                         goto out;
1684                 }
1685         }
1686
1687         dev_next = container_of(node->next, struct acpi_video_device, entry);
1688         dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1689
1690  out:
1691         mutex_unlock(&video->device_list_lock);
1692
1693         switch (event) {
1694         case ACPI_VIDEO_NOTIFY_CYCLE:
1695         case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1696                 acpi_video_device_set_state(dev, 0);
1697                 acpi_video_device_set_state(dev_next, 0x80000001);
1698                 break;
1699         case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1700                 acpi_video_device_set_state(dev, 0);
1701                 acpi_video_device_set_state(dev_prev, 0x80000001);
1702         default:
1703                 break;
1704         }
1705
1706         return status;
1707 }
1708
1709 static int
1710 acpi_video_get_next_level(struct acpi_video_device *device,
1711                           u32 level_current, u32 event)
1712 {
1713         int min, max, min_above, max_below, i, l, delta = 255;
1714         max = max_below = 0;
1715         min = min_above = 255;
1716         /* Find closest level to level_current */
1717         for (i = 0; i < device->brightness->count; i++) {
1718                 l = device->brightness->levels[i];
1719                 if (abs(l - level_current) < abs(delta)) {
1720                         delta = l - level_current;
1721                         if (!delta)
1722                                 break;
1723                 }
1724         }
1725         /* Ajust level_current to closest available level */
1726         level_current += delta;
1727         for (i = 0; i < device->brightness->count; i++) {
1728                 l = device->brightness->levels[i];
1729                 if (l < min)
1730                         min = l;
1731                 if (l > max)
1732                         max = l;
1733                 if (l < min_above && l > level_current)
1734                         min_above = l;
1735                 if (l > max_below && l < level_current)
1736                         max_below = l;
1737         }
1738
1739         switch (event) {
1740         case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1741                 return (level_current < max) ? min_above : min;
1742         case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1743                 return (level_current < max) ? min_above : max;
1744         case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1745                 return (level_current > min) ? max_below : min;
1746         case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1747         case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1748                 return 0;
1749         default:
1750                 return level_current;
1751         }
1752 }
1753
1754 static void
1755 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1756 {
1757         unsigned long level_current, level_next;
1758         acpi_video_device_lcd_get_level_current(device, &level_current);
1759         level_next = acpi_video_get_next_level(device, level_current, event);
1760         acpi_video_device_lcd_set_level(device, level_next);
1761 }
1762
1763 static int
1764 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1765                            struct acpi_device *device)
1766 {
1767         int status = 0;
1768         struct acpi_device *dev;
1769
1770         acpi_video_device_enumerate(video);
1771
1772         list_for_each_entry(dev, &device->children, node) {
1773
1774                 status = acpi_video_bus_get_one_device(dev, video);
1775                 if (ACPI_FAILURE(status)) {
1776                         ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1777                         continue;
1778                 }
1779         }
1780         return status;
1781 }
1782
1783 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1784 {
1785         acpi_status status;
1786         struct acpi_video_bus *video;
1787
1788
1789         if (!device || !device->video)
1790                 return -ENOENT;
1791
1792         video = device->video;
1793
1794         acpi_video_device_remove_fs(device->dev);
1795
1796         status = acpi_remove_notify_handler(device->dev->handle,
1797                                             ACPI_DEVICE_NOTIFY,
1798                                             acpi_video_device_notify);
1799         backlight_device_unregister(device->backlight);
1800         if (device->cdev) {
1801                 sysfs_remove_link(&device->dev->dev.kobj,
1802                                   "thermal_cooling");
1803                 sysfs_remove_link(&device->cdev->device.kobj,
1804                                   "device");
1805                 thermal_cooling_device_unregister(device->cdev);
1806                 device->cdev = NULL;
1807         }
1808         video_output_unregister(device->output_dev);
1809
1810         return 0;
1811 }
1812
1813 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1814 {
1815         int status;
1816         struct acpi_video_device *dev, *next;
1817
1818         mutex_lock(&video->device_list_lock);
1819
1820         list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1821
1822                 status = acpi_video_bus_put_one_device(dev);
1823                 if (ACPI_FAILURE(status))
1824                         printk(KERN_WARNING PREFIX
1825                                "hhuuhhuu bug in acpi video driver.\n");
1826
1827                 if (dev->brightness) {
1828                         kfree(dev->brightness->levels);
1829                         kfree(dev->brightness);
1830                 }
1831                 list_del(&dev->entry);
1832                 kfree(dev);
1833         }
1834
1835         mutex_unlock(&video->device_list_lock);
1836
1837         return 0;
1838 }
1839
1840 /* acpi_video interface */
1841
1842 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1843 {
1844         return acpi_video_bus_DOS(video, 0, 0);
1845 }
1846
1847 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1848 {
1849         return acpi_video_bus_DOS(video, 0, 1);
1850 }
1851
1852 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1853 {
1854         struct acpi_video_bus *video = data;
1855         struct acpi_device *device = NULL;
1856         struct input_dev *input;
1857         int keycode;
1858
1859         if (!video)
1860                 return;
1861
1862         device = video->device;
1863         input = video->input;
1864
1865         switch (event) {
1866         case ACPI_VIDEO_NOTIFY_SWITCH:  /* User requested a switch,
1867                                          * most likely via hotkey. */
1868                 acpi_bus_generate_proc_event(device, event, 0);
1869                 keycode = KEY_SWITCHVIDEOMODE;
1870                 break;
1871
1872         case ACPI_VIDEO_NOTIFY_PROBE:   /* User plugged in or removed a video
1873                                          * connector. */
1874                 acpi_video_device_enumerate(video);
1875                 acpi_video_device_rebind(video);
1876                 acpi_video_switch_output(video, event);
1877                 acpi_bus_generate_proc_event(device, event, 0);
1878                 keycode = KEY_SWITCHVIDEOMODE;
1879                 break;
1880
1881         case ACPI_VIDEO_NOTIFY_CYCLE:   /* Cycle Display output hotkey pressed. */
1882                 acpi_video_switch_output(video, event);
1883                 acpi_bus_generate_proc_event(device, event, 0);
1884                 keycode = KEY_SWITCHVIDEOMODE;
1885                 break;
1886         case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:     /* Next Display output hotkey pressed. */
1887                 acpi_video_switch_output(video, event);
1888                 acpi_bus_generate_proc_event(device, event, 0);
1889                 keycode = KEY_VIDEO_NEXT;
1890                 break;
1891         case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:     /* previous Display output hotkey pressed. */
1892                 acpi_video_switch_output(video, event);
1893                 acpi_bus_generate_proc_event(device, event, 0);
1894                 keycode = KEY_VIDEO_PREV;
1895                 break;
1896
1897         default:
1898                 keycode = KEY_UNKNOWN;
1899                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1900                                   "Unsupported event [0x%x]\n", event));
1901                 break;
1902         }
1903
1904         input_report_key(input, keycode, 1);
1905         input_sync(input);
1906         input_report_key(input, keycode, 0);
1907         input_sync(input);
1908
1909         return;
1910 }
1911
1912 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1913 {
1914         struct acpi_video_device *video_device = data;
1915         struct acpi_device *device = NULL;
1916         struct acpi_video_bus *bus;
1917         struct input_dev *input;
1918         int keycode;
1919
1920         if (!video_device)
1921                 return;
1922
1923         device = video_device->dev;
1924         bus = video_device->video;
1925         input = bus->input;
1926
1927         switch (event) {
1928         case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:        /* Cycle brightness */
1929                 acpi_video_switch_brightness(video_device, event);
1930                 acpi_bus_generate_proc_event(device, event, 0);
1931                 keycode = KEY_BRIGHTNESS_CYCLE;
1932                 break;
1933         case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:  /* Increase brightness */
1934                 acpi_video_switch_brightness(video_device, event);
1935                 acpi_bus_generate_proc_event(device, event, 0);
1936                 keycode = KEY_BRIGHTNESSUP;
1937                 break;
1938         case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:  /* Decrease brightness */
1939                 acpi_video_switch_brightness(video_device, event);
1940                 acpi_bus_generate_proc_event(device, event, 0);
1941                 keycode = KEY_BRIGHTNESSDOWN;
1942                 break;
1943         case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1944                 acpi_video_switch_brightness(video_device, event);
1945                 acpi_bus_generate_proc_event(device, event, 0);
1946                 keycode = KEY_BRIGHTNESS_ZERO;
1947                 break;
1948         case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:     /* display device off */
1949                 acpi_video_switch_brightness(video_device, event);
1950                 acpi_bus_generate_proc_event(device, event, 0);
1951                 keycode = KEY_DISPLAY_OFF;
1952                 break;
1953         default:
1954                 keycode = KEY_UNKNOWN;
1955                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1956                                   "Unsupported event [0x%x]\n", event));
1957                 break;
1958         }
1959
1960         input_report_key(input, keycode, 1);
1961         input_sync(input);
1962         input_report_key(input, keycode, 0);
1963         input_sync(input);
1964
1965         return;
1966 }
1967
1968 static int instance;
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         acpi_driver_data(device) = 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                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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         acpi_driver_data(device) = 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);