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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[deliverable/linux.git] / 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 <linux/sort.h>
40 #include <asm/uaccess.h>
41
42 #include <acpi/acpi_bus.h>
43 #include <acpi/acpi_drivers.h>
44
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 int state;
486
487
488 arg0.integer.value = level;
489
490 if (device->cap._BCM)
491 status = acpi_evaluate_object(device->dev->handle, "_BCM",
492 &args, NULL);
493 device->brightness->curr = level;
494 for (state = 2; state < device->brightness->count; state++)
495 if (level == device->brightness->levels[state])
496 device->backlight->props.brightness = state - 2;
497
498 return status;
499 }
500
501 static int
502 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
503 unsigned long long *level)
504 {
505 if (device->cap._BQC)
506 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
507 level);
508 *level = device->brightness->curr;
509 return AE_OK;
510 }
511
512 static int
513 acpi_video_device_EDID(struct acpi_video_device *device,
514 union acpi_object **edid, ssize_t length)
515 {
516 int status;
517 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
518 union acpi_object *obj;
519 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
520 struct acpi_object_list args = { 1, &arg0 };
521
522
523 *edid = NULL;
524
525 if (!device)
526 return -ENODEV;
527 if (length == 128)
528 arg0.integer.value = 1;
529 else if (length == 256)
530 arg0.integer.value = 2;
531 else
532 return -EINVAL;
533
534 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
535 if (ACPI_FAILURE(status))
536 return -ENODEV;
537
538 obj = buffer.pointer;
539
540 if (obj && obj->type == ACPI_TYPE_BUFFER)
541 *edid = obj;
542 else {
543 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
544 status = -EFAULT;
545 kfree(obj);
546 }
547
548 return status;
549 }
550
551 /* bus */
552
553 static int
554 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
555 {
556 int status;
557 unsigned long long tmp;
558 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
559 struct acpi_object_list args = { 1, &arg0 };
560
561
562 arg0.integer.value = option;
563
564 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
565 if (ACPI_SUCCESS(status))
566 status = tmp ? (-EINVAL) : (AE_OK);
567
568 return status;
569 }
570
571 static int
572 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
573 {
574 int status;
575
576 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
577
578 return status;
579 }
580
581 static int
582 acpi_video_bus_POST_options(struct acpi_video_bus *video,
583 unsigned long long *options)
584 {
585 int status;
586
587 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
588 *options &= 3;
589
590 return status;
591 }
592
593 /*
594 * Arg:
595 * video : video bus device pointer
596 * bios_flag :
597 * 0. The system BIOS should NOT automatically switch(toggle)
598 * the active display output.
599 * 1. The system BIOS should automatically switch (toggle) the
600 * active display output. No switch event.
601 * 2. The _DGS value should be locked.
602 * 3. The system BIOS should not automatically switch (toggle) the
603 * active display output, but instead generate the display switch
604 * event notify code.
605 * lcd_flag :
606 * 0. The system BIOS should automatically control the brightness level
607 * of the LCD when the power changes from AC to DC
608 * 1. The system BIOS should NOT automatically control the brightness
609 * level of the LCD when the power changes from AC to DC.
610 * Return Value:
611 * -1 wrong arg.
612 */
613
614 static int
615 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
616 {
617 acpi_integer status = 0;
618 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
619 struct acpi_object_list args = { 1, &arg0 };
620
621
622 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
623 status = -1;
624 goto Failed;
625 }
626 arg0.integer.value = (lcd_flag << 2) | bios_flag;
627 video->dos_setting = arg0.integer.value;
628 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
629
630 Failed:
631 return status;
632 }
633
634 /*
635 * Simple comparison function used to sort backlight levels.
636 */
637
638 static int
639 acpi_video_cmp_level(const void *a, const void *b)
640 {
641 return *(int *)a - *(int *)b;
642 }
643
644 /*
645 * Arg:
646 * device : video output device (LCD, CRT, ..)
647 *
648 * Return Value:
649 * Maximum brightness level
650 *
651 * Allocate and initialize device->brightness.
652 */
653
654 static int
655 acpi_video_init_brightness(struct acpi_video_device *device)
656 {
657 union acpi_object *obj = NULL;
658 int i, max_level = 0, count = 0;
659 union acpi_object *o;
660 struct acpi_video_device_brightness *br = NULL;
661
662 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
663 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
664 "LCD brightness level\n"));
665 goto out;
666 }
667
668 if (obj->package.count < 2)
669 goto out;
670
671 br = kzalloc(sizeof(*br), GFP_KERNEL);
672 if (!br) {
673 printk(KERN_ERR "can't allocate memory\n");
674 goto out;
675 }
676
677 br->levels = kmalloc(obj->package.count * sizeof *(br->levels),
678 GFP_KERNEL);
679 if (!br->levels)
680 goto out_free;
681
682 for (i = 0; i < obj->package.count; i++) {
683 o = (union acpi_object *)&obj->package.elements[i];
684 if (o->type != ACPI_TYPE_INTEGER) {
685 printk(KERN_ERR PREFIX "Invalid data\n");
686 continue;
687 }
688 br->levels[count] = (u32) o->integer.value;
689
690 if (br->levels[count] > max_level)
691 max_level = br->levels[count];
692 count++;
693 }
694
695 /* don't sort the first two brightness levels */
696 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
697 acpi_video_cmp_level, NULL);
698
699 if (count < 2)
700 goto out_free_levels;
701
702 br->count = count;
703 device->brightness = br;
704 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "found %d brightness levels\n", count));
705 kfree(obj);
706 return max_level;
707
708 out_free_levels:
709 kfree(br->levels);
710 out_free:
711 kfree(br);
712 out:
713 device->brightness = NULL;
714 kfree(obj);
715 return 0;
716 }
717
718 /*
719 * Arg:
720 * device : video output device (LCD, CRT, ..)
721 *
722 * Return Value:
723 * None
724 *
725 * Find out all required AML methods defined under the output
726 * device.
727 */
728
729 static void acpi_video_device_find_cap(struct acpi_video_device *device)
730 {
731 acpi_handle h_dummy1;
732 u32 max_level = 0;
733
734
735 memset(&device->cap, 0, sizeof(device->cap));
736
737 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
738 device->cap._ADR = 1;
739 }
740 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
741 device->cap._BCL = 1;
742 }
743 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
744 device->cap._BCM = 1;
745 }
746 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
747 device->cap._BQC = 1;
748 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
749 device->cap._DDC = 1;
750 }
751 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
752 device->cap._DCS = 1;
753 }
754 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
755 device->cap._DGS = 1;
756 }
757 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
758 device->cap._DSS = 1;
759 }
760
761 if (acpi_video_backlight_support())
762 max_level = acpi_video_init_brightness(device);
763
764 if (device->cap._BCL && device->cap._BCM && max_level > 0) {
765 int result;
766 static int count = 0;
767 char *name;
768 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
769 if (!name)
770 return;
771
772 sprintf(name, "acpi_video%d", count++);
773 device->backlight = backlight_device_register(name,
774 NULL, device, &acpi_backlight_ops);
775 device->backlight->props.max_brightness = device->brightness->count-3;
776 /*
777 * If there exists the _BQC object, the _BQC object will be
778 * called to get the current backlight brightness. Otherwise
779 * the brightness will be set to the maximum.
780 */
781 if (device->cap._BQC)
782 device->backlight->props.brightness =
783 acpi_video_get_brightness(device->backlight);
784 else
785 device->backlight->props.brightness =
786 device->backlight->props.max_brightness;
787 backlight_update_status(device->backlight);
788 kfree(name);
789
790 device->cdev = thermal_cooling_device_register("LCD",
791 device->dev, &video_cooling_ops);
792 if (IS_ERR(device->cdev))
793 return;
794
795 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
796 device->cdev->id);
797 result = sysfs_create_link(&device->dev->dev.kobj,
798 &device->cdev->device.kobj,
799 "thermal_cooling");
800 if (result)
801 printk(KERN_ERR PREFIX "Create sysfs link\n");
802 result = sysfs_create_link(&device->cdev->device.kobj,
803 &device->dev->dev.kobj, "device");
804 if (result)
805 printk(KERN_ERR PREFIX "Create sysfs link\n");
806
807 }
808
809 if (acpi_video_display_switch_support()) {
810
811 if (device->cap._DCS && device->cap._DSS) {
812 static int count;
813 char *name;
814 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
815 if (!name)
816 return;
817 sprintf(name, "acpi_video%d", count++);
818 device->output_dev = video_output_register(name,
819 NULL, device, &acpi_output_properties);
820 kfree(name);
821 }
822 }
823 }
824
825 /*
826 * Arg:
827 * device : video output device (VGA)
828 *
829 * Return Value:
830 * None
831 *
832 * Find out all required AML methods defined under the video bus device.
833 */
834
835 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
836 {
837 acpi_handle h_dummy1;
838
839 memset(&video->cap, 0, sizeof(video->cap));
840 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
841 video->cap._DOS = 1;
842 }
843 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
844 video->cap._DOD = 1;
845 }
846 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
847 video->cap._ROM = 1;
848 }
849 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
850 video->cap._GPD = 1;
851 }
852 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
853 video->cap._SPD = 1;
854 }
855 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
856 video->cap._VPO = 1;
857 }
858 }
859
860 /*
861 * Check whether the video bus device has required AML method to
862 * support the desired features
863 */
864
865 static int acpi_video_bus_check(struct acpi_video_bus *video)
866 {
867 acpi_status status = -ENOENT;
868 struct device *dev;
869
870 if (!video)
871 return -EINVAL;
872
873 dev = acpi_get_physical_pci_device(video->device->handle);
874 if (!dev)
875 return -ENODEV;
876 put_device(dev);
877
878 /* Since there is no HID, CID and so on for VGA driver, we have
879 * to check well known required nodes.
880 */
881
882 /* Does this device support video switching? */
883 if (video->cap._DOS) {
884 video->flags.multihead = 1;
885 status = 0;
886 }
887
888 /* Does this device support retrieving a video ROM? */
889 if (video->cap._ROM) {
890 video->flags.rom = 1;
891 status = 0;
892 }
893
894 /* Does this device support configuring which video device to POST? */
895 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
896 video->flags.post = 1;
897 status = 0;
898 }
899
900 return status;
901 }
902
903 /* --------------------------------------------------------------------------
904 FS Interface (/proc)
905 -------------------------------------------------------------------------- */
906
907 static struct proc_dir_entry *acpi_video_dir;
908
909 /* video devices */
910
911 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
912 {
913 struct acpi_video_device *dev = seq->private;
914
915
916 if (!dev)
917 goto end;
918
919 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
920 seq_printf(seq, "type: ");
921 if (dev->flags.crt)
922 seq_printf(seq, "CRT\n");
923 else if (dev->flags.lcd)
924 seq_printf(seq, "LCD\n");
925 else if (dev->flags.tvout)
926 seq_printf(seq, "TVOUT\n");
927 else if (dev->flags.dvi)
928 seq_printf(seq, "DVI\n");
929 else
930 seq_printf(seq, "UNKNOWN\n");
931
932 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
933
934 end:
935 return 0;
936 }
937
938 static int
939 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
940 {
941 return single_open(file, acpi_video_device_info_seq_show,
942 PDE(inode)->data);
943 }
944
945 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
946 {
947 int status;
948 struct acpi_video_device *dev = seq->private;
949 unsigned long long state;
950
951
952 if (!dev)
953 goto end;
954
955 status = acpi_video_device_get_state(dev, &state);
956 seq_printf(seq, "state: ");
957 if (ACPI_SUCCESS(status))
958 seq_printf(seq, "0x%02llx\n", state);
959 else
960 seq_printf(seq, "<not supported>\n");
961
962 status = acpi_video_device_query(dev, &state);
963 seq_printf(seq, "query: ");
964 if (ACPI_SUCCESS(status))
965 seq_printf(seq, "0x%02llx\n", state);
966 else
967 seq_printf(seq, "<not supported>\n");
968
969 end:
970 return 0;
971 }
972
973 static int
974 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
975 {
976 return single_open(file, acpi_video_device_state_seq_show,
977 PDE(inode)->data);
978 }
979
980 static ssize_t
981 acpi_video_device_write_state(struct file *file,
982 const char __user * buffer,
983 size_t count, loff_t * data)
984 {
985 int status;
986 struct seq_file *m = file->private_data;
987 struct acpi_video_device *dev = m->private;
988 char str[12] = { 0 };
989 u32 state = 0;
990
991
992 if (!dev || count + 1 > sizeof str)
993 return -EINVAL;
994
995 if (copy_from_user(str, buffer, count))
996 return -EFAULT;
997
998 str[count] = 0;
999 state = simple_strtoul(str, NULL, 0);
1000 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1001
1002 status = acpi_video_device_set_state(dev, state);
1003
1004 if (status)
1005 return -EFAULT;
1006
1007 return count;
1008 }
1009
1010 static int
1011 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1012 {
1013 struct acpi_video_device *dev = seq->private;
1014 int i;
1015
1016
1017 if (!dev || !dev->brightness) {
1018 seq_printf(seq, "<not supported>\n");
1019 return 0;
1020 }
1021
1022 seq_printf(seq, "levels: ");
1023 for (i = 0; i < dev->brightness->count; i++)
1024 seq_printf(seq, " %d", dev->brightness->levels[i]);
1025 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1026
1027 return 0;
1028 }
1029
1030 static int
1031 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1032 {
1033 return single_open(file, acpi_video_device_brightness_seq_show,
1034 PDE(inode)->data);
1035 }
1036
1037 static ssize_t
1038 acpi_video_device_write_brightness(struct file *file,
1039 const char __user * buffer,
1040 size_t count, loff_t * data)
1041 {
1042 struct seq_file *m = file->private_data;
1043 struct acpi_video_device *dev = m->private;
1044 char str[5] = { 0 };
1045 unsigned int level = 0;
1046 int i;
1047
1048
1049 if (!dev || !dev->brightness || count + 1 > sizeof str)
1050 return -EINVAL;
1051
1052 if (copy_from_user(str, buffer, count))
1053 return -EFAULT;
1054
1055 str[count] = 0;
1056 level = simple_strtoul(str, NULL, 0);
1057
1058 if (level > 100)
1059 return -EFAULT;
1060
1061 /* validate through the list of available levels */
1062 for (i = 0; i < dev->brightness->count; i++)
1063 if (level == dev->brightness->levels[i]) {
1064 if (ACPI_SUCCESS
1065 (acpi_video_device_lcd_set_level(dev, level)))
1066 dev->brightness->curr = level;
1067 break;
1068 }
1069
1070 return count;
1071 }
1072
1073 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1074 {
1075 struct acpi_video_device *dev = seq->private;
1076 int status;
1077 int i;
1078 union acpi_object *edid = NULL;
1079
1080
1081 if (!dev)
1082 goto out;
1083
1084 status = acpi_video_device_EDID(dev, &edid, 128);
1085 if (ACPI_FAILURE(status)) {
1086 status = acpi_video_device_EDID(dev, &edid, 256);
1087 }
1088
1089 if (ACPI_FAILURE(status)) {
1090 goto out;
1091 }
1092
1093 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1094 for (i = 0; i < edid->buffer.length; i++)
1095 seq_putc(seq, edid->buffer.pointer[i]);
1096 }
1097
1098 out:
1099 if (!edid)
1100 seq_printf(seq, "<not supported>\n");
1101 else
1102 kfree(edid);
1103
1104 return 0;
1105 }
1106
1107 static int
1108 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1109 {
1110 return single_open(file, acpi_video_device_EDID_seq_show,
1111 PDE(inode)->data);
1112 }
1113
1114 static int acpi_video_device_add_fs(struct acpi_device *device)
1115 {
1116 struct proc_dir_entry *entry, *device_dir;
1117 struct acpi_video_device *vid_dev;
1118
1119 vid_dev = acpi_driver_data(device);
1120 if (!vid_dev)
1121 return -ENODEV;
1122
1123 device_dir = proc_mkdir(acpi_device_bid(device),
1124 vid_dev->video->dir);
1125 if (!device_dir)
1126 return -ENOMEM;
1127
1128 device_dir->owner = THIS_MODULE;
1129
1130 /* 'info' [R] */
1131 entry = proc_create_data("info", S_IRUGO, device_dir,
1132 &acpi_video_device_info_fops, acpi_driver_data(device));
1133 if (!entry)
1134 goto err_remove_dir;
1135
1136 /* 'state' [R/W] */
1137 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1138 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1139 device_dir,
1140 &acpi_video_device_state_fops,
1141 acpi_driver_data(device));
1142 if (!entry)
1143 goto err_remove_info;
1144
1145 /* 'brightness' [R/W] */
1146 acpi_video_device_brightness_fops.write =
1147 acpi_video_device_write_brightness;
1148 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1149 device_dir,
1150 &acpi_video_device_brightness_fops,
1151 acpi_driver_data(device));
1152 if (!entry)
1153 goto err_remove_state;
1154
1155 /* 'EDID' [R] */
1156 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1157 &acpi_video_device_EDID_fops,
1158 acpi_driver_data(device));
1159 if (!entry)
1160 goto err_remove_brightness;
1161
1162 acpi_device_dir(device) = device_dir;
1163
1164 return 0;
1165
1166 err_remove_brightness:
1167 remove_proc_entry("brightness", device_dir);
1168 err_remove_state:
1169 remove_proc_entry("state", device_dir);
1170 err_remove_info:
1171 remove_proc_entry("info", device_dir);
1172 err_remove_dir:
1173 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1174 return -ENOMEM;
1175 }
1176
1177 static int acpi_video_device_remove_fs(struct acpi_device *device)
1178 {
1179 struct acpi_video_device *vid_dev;
1180 struct proc_dir_entry *device_dir;
1181
1182 vid_dev = acpi_driver_data(device);
1183 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1184 return -ENODEV;
1185
1186 device_dir = acpi_device_dir(device);
1187 if (device_dir) {
1188 remove_proc_entry("info", device_dir);
1189 remove_proc_entry("state", device_dir);
1190 remove_proc_entry("brightness", device_dir);
1191 remove_proc_entry("EDID", device_dir);
1192 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1193 acpi_device_dir(device) = NULL;
1194 }
1195
1196 return 0;
1197 }
1198
1199 /* video bus */
1200 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1201 {
1202 struct acpi_video_bus *video = seq->private;
1203
1204
1205 if (!video)
1206 goto end;
1207
1208 seq_printf(seq, "Switching heads: %s\n",
1209 video->flags.multihead ? "yes" : "no");
1210 seq_printf(seq, "Video ROM: %s\n",
1211 video->flags.rom ? "yes" : "no");
1212 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1213 video->flags.post ? "yes" : "no");
1214
1215 end:
1216 return 0;
1217 }
1218
1219 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1220 {
1221 return single_open(file, acpi_video_bus_info_seq_show,
1222 PDE(inode)->data);
1223 }
1224
1225 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1226 {
1227 struct acpi_video_bus *video = seq->private;
1228
1229
1230 if (!video)
1231 goto end;
1232
1233 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1234 seq_printf(seq, "<TODO>\n");
1235
1236 end:
1237 return 0;
1238 }
1239
1240 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1241 {
1242 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1243 }
1244
1245 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1246 {
1247 struct acpi_video_bus *video = seq->private;
1248 unsigned long long options;
1249 int status;
1250
1251
1252 if (!video)
1253 goto end;
1254
1255 status = acpi_video_bus_POST_options(video, &options);
1256 if (ACPI_SUCCESS(status)) {
1257 if (!(options & 1)) {
1258 printk(KERN_WARNING PREFIX
1259 "The motherboard VGA device is not listed as a possible POST device.\n");
1260 printk(KERN_WARNING PREFIX
1261 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1262 }
1263 printk("%llx\n", options);
1264 seq_printf(seq, "can POST: <integrated video>");
1265 if (options & 2)
1266 seq_printf(seq, " <PCI video>");
1267 if (options & 4)
1268 seq_printf(seq, " <AGP video>");
1269 seq_putc(seq, '\n');
1270 } else
1271 seq_printf(seq, "<not supported>\n");
1272 end:
1273 return 0;
1274 }
1275
1276 static int
1277 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1278 {
1279 return single_open(file, acpi_video_bus_POST_info_seq_show,
1280 PDE(inode)->data);
1281 }
1282
1283 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1284 {
1285 struct acpi_video_bus *video = seq->private;
1286 int status;
1287 unsigned long long id;
1288
1289
1290 if (!video)
1291 goto end;
1292
1293 status = acpi_video_bus_get_POST(video, &id);
1294 if (!ACPI_SUCCESS(status)) {
1295 seq_printf(seq, "<not supported>\n");
1296 goto end;
1297 }
1298 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1299
1300 end:
1301 return 0;
1302 }
1303
1304 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1305 {
1306 struct acpi_video_bus *video = seq->private;
1307
1308
1309 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1310
1311 return 0;
1312 }
1313
1314 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1315 {
1316 return single_open(file, acpi_video_bus_POST_seq_show,
1317 PDE(inode)->data);
1318 }
1319
1320 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1321 {
1322 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1323 }
1324
1325 static ssize_t
1326 acpi_video_bus_write_POST(struct file *file,
1327 const char __user * buffer,
1328 size_t count, loff_t * data)
1329 {
1330 int status;
1331 struct seq_file *m = file->private_data;
1332 struct acpi_video_bus *video = m->private;
1333 char str[12] = { 0 };
1334 unsigned long long opt, options;
1335
1336
1337 if (!video || count + 1 > sizeof str)
1338 return -EINVAL;
1339
1340 status = acpi_video_bus_POST_options(video, &options);
1341 if (!ACPI_SUCCESS(status))
1342 return -EINVAL;
1343
1344 if (copy_from_user(str, buffer, count))
1345 return -EFAULT;
1346
1347 str[count] = 0;
1348 opt = strtoul(str, NULL, 0);
1349 if (opt > 3)
1350 return -EFAULT;
1351
1352 /* just in case an OEM 'forgot' the motherboard... */
1353 options |= 1;
1354
1355 if (options & (1ul << opt)) {
1356 status = acpi_video_bus_set_POST(video, opt);
1357 if (!ACPI_SUCCESS(status))
1358 return -EFAULT;
1359
1360 }
1361
1362 return count;
1363 }
1364
1365 static ssize_t
1366 acpi_video_bus_write_DOS(struct file *file,
1367 const char __user * buffer,
1368 size_t count, loff_t * data)
1369 {
1370 int status;
1371 struct seq_file *m = file->private_data;
1372 struct acpi_video_bus *video = m->private;
1373 char str[12] = { 0 };
1374 unsigned long opt;
1375
1376
1377 if (!video || count + 1 > sizeof str)
1378 return -EINVAL;
1379
1380 if (copy_from_user(str, buffer, count))
1381 return -EFAULT;
1382
1383 str[count] = 0;
1384 opt = strtoul(str, NULL, 0);
1385 if (opt > 7)
1386 return -EFAULT;
1387
1388 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1389
1390 if (!ACPI_SUCCESS(status))
1391 return -EFAULT;
1392
1393 return count;
1394 }
1395
1396 static int acpi_video_bus_add_fs(struct acpi_device *device)
1397 {
1398 struct acpi_video_bus *video = acpi_driver_data(device);
1399 struct proc_dir_entry *device_dir;
1400 struct proc_dir_entry *entry;
1401
1402 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1403 if (!device_dir)
1404 return -ENOMEM;
1405
1406 device_dir->owner = THIS_MODULE;
1407
1408 /* 'info' [R] */
1409 entry = proc_create_data("info", S_IRUGO, device_dir,
1410 &acpi_video_bus_info_fops,
1411 acpi_driver_data(device));
1412 if (!entry)
1413 goto err_remove_dir;
1414
1415 /* 'ROM' [R] */
1416 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1417 &acpi_video_bus_ROM_fops,
1418 acpi_driver_data(device));
1419 if (!entry)
1420 goto err_remove_info;
1421
1422 /* 'POST_info' [R] */
1423 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1424 &acpi_video_bus_POST_info_fops,
1425 acpi_driver_data(device));
1426 if (!entry)
1427 goto err_remove_rom;
1428
1429 /* 'POST' [R/W] */
1430 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1431 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1432 device_dir,
1433 &acpi_video_bus_POST_fops,
1434 acpi_driver_data(device));
1435 if (!entry)
1436 goto err_remove_post_info;
1437
1438 /* 'DOS' [R/W] */
1439 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1440 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1441 device_dir,
1442 &acpi_video_bus_DOS_fops,
1443 acpi_driver_data(device));
1444 if (!entry)
1445 goto err_remove_post;
1446
1447 video->dir = acpi_device_dir(device) = device_dir;
1448 return 0;
1449
1450 err_remove_post:
1451 remove_proc_entry("POST", device_dir);
1452 err_remove_post_info:
1453 remove_proc_entry("POST_info", device_dir);
1454 err_remove_rom:
1455 remove_proc_entry("ROM", device_dir);
1456 err_remove_info:
1457 remove_proc_entry("info", device_dir);
1458 err_remove_dir:
1459 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1460 return -ENOMEM;
1461 }
1462
1463 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1464 {
1465 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1466
1467 if (device_dir) {
1468 remove_proc_entry("info", device_dir);
1469 remove_proc_entry("ROM", device_dir);
1470 remove_proc_entry("POST_info", device_dir);
1471 remove_proc_entry("POST", device_dir);
1472 remove_proc_entry("DOS", device_dir);
1473 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1474 acpi_device_dir(device) = NULL;
1475 }
1476
1477 return 0;
1478 }
1479
1480 /* --------------------------------------------------------------------------
1481 Driver Interface
1482 -------------------------------------------------------------------------- */
1483
1484 /* device interface */
1485 static struct acpi_video_device_attrib*
1486 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1487 {
1488 struct acpi_video_enumerated_device *ids;
1489 int i;
1490
1491 for (i = 0; i < video->attached_count; i++) {
1492 ids = &video->attached_array[i];
1493 if ((ids->value.int_val & 0xffff) == device_id)
1494 return &ids->value.attrib;
1495 }
1496
1497 return NULL;
1498 }
1499
1500 static int
1501 acpi_video_bus_get_one_device(struct acpi_device *device,
1502 struct acpi_video_bus *video)
1503 {
1504 unsigned long long device_id;
1505 int status;
1506 struct acpi_video_device *data;
1507 struct acpi_video_device_attrib* attribute;
1508
1509 if (!device || !video)
1510 return -EINVAL;
1511
1512 status =
1513 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1514 if (ACPI_SUCCESS(status)) {
1515
1516 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1517 if (!data)
1518 return -ENOMEM;
1519
1520 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1521 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1522 device->driver_data = data;
1523
1524 data->device_id = device_id;
1525 data->video = video;
1526 data->dev = device;
1527
1528 attribute = acpi_video_get_device_attr(video, device_id);
1529
1530 if((attribute != NULL) && attribute->device_id_scheme) {
1531 switch (attribute->display_type) {
1532 case ACPI_VIDEO_DISPLAY_CRT:
1533 data->flags.crt = 1;
1534 break;
1535 case ACPI_VIDEO_DISPLAY_TV:
1536 data->flags.tvout = 1;
1537 break;
1538 case ACPI_VIDEO_DISPLAY_DVI:
1539 data->flags.dvi = 1;
1540 break;
1541 case ACPI_VIDEO_DISPLAY_LCD:
1542 data->flags.lcd = 1;
1543 break;
1544 default:
1545 data->flags.unknown = 1;
1546 break;
1547 }
1548 if(attribute->bios_can_detect)
1549 data->flags.bios = 1;
1550 } else
1551 data->flags.unknown = 1;
1552
1553 acpi_video_device_bind(video, data);
1554 acpi_video_device_find_cap(data);
1555
1556 status = acpi_install_notify_handler(device->handle,
1557 ACPI_DEVICE_NOTIFY,
1558 acpi_video_device_notify,
1559 data);
1560 if (ACPI_FAILURE(status)) {
1561 printk(KERN_ERR PREFIX
1562 "Error installing notify handler\n");
1563 if(data->brightness)
1564 kfree(data->brightness->levels);
1565 kfree(data->brightness);
1566 kfree(data);
1567 return -ENODEV;
1568 }
1569
1570 mutex_lock(&video->device_list_lock);
1571 list_add_tail(&data->entry, &video->video_device_list);
1572 mutex_unlock(&video->device_list_lock);
1573
1574 acpi_video_device_add_fs(device);
1575
1576 return 0;
1577 }
1578
1579 return -ENOENT;
1580 }
1581
1582 /*
1583 * Arg:
1584 * video : video bus device
1585 *
1586 * Return:
1587 * none
1588 *
1589 * Enumerate the video device list of the video bus,
1590 * bind the ids with the corresponding video devices
1591 * under the video bus.
1592 */
1593
1594 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1595 {
1596 struct acpi_video_device *dev;
1597
1598 mutex_lock(&video->device_list_lock);
1599
1600 list_for_each_entry(dev, &video->video_device_list, entry)
1601 acpi_video_device_bind(video, dev);
1602
1603 mutex_unlock(&video->device_list_lock);
1604 }
1605
1606 /*
1607 * Arg:
1608 * video : video bus device
1609 * device : video output device under the video
1610 * bus
1611 *
1612 * Return:
1613 * none
1614 *
1615 * Bind the ids with the corresponding video devices
1616 * under the video bus.
1617 */
1618
1619 static void
1620 acpi_video_device_bind(struct acpi_video_bus *video,
1621 struct acpi_video_device *device)
1622 {
1623 struct acpi_video_enumerated_device *ids;
1624 int i;
1625
1626 for (i = 0; i < video->attached_count; i++) {
1627 ids = &video->attached_array[i];
1628 if (device->device_id == (ids->value.int_val & 0xffff)) {
1629 ids->bind_info = device;
1630 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1631 }
1632 }
1633 }
1634
1635 /*
1636 * Arg:
1637 * video : video bus device
1638 *
1639 * Return:
1640 * < 0 : error
1641 *
1642 * Call _DOD to enumerate all devices attached to display adapter
1643 *
1644 */
1645
1646 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1647 {
1648 int status;
1649 int count;
1650 int i;
1651 struct acpi_video_enumerated_device *active_list;
1652 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1653 union acpi_object *dod = NULL;
1654 union acpi_object *obj;
1655
1656 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1657 if (!ACPI_SUCCESS(status)) {
1658 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1659 return status;
1660 }
1661
1662 dod = buffer.pointer;
1663 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1664 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1665 status = -EFAULT;
1666 goto out;
1667 }
1668
1669 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1670 dod->package.count));
1671
1672 active_list = kcalloc(1 + dod->package.count,
1673 sizeof(struct acpi_video_enumerated_device),
1674 GFP_KERNEL);
1675 if (!active_list) {
1676 status = -ENOMEM;
1677 goto out;
1678 }
1679
1680 count = 0;
1681 for (i = 0; i < dod->package.count; i++) {
1682 obj = &dod->package.elements[i];
1683
1684 if (obj->type != ACPI_TYPE_INTEGER) {
1685 printk(KERN_ERR PREFIX
1686 "Invalid _DOD data in element %d\n", i);
1687 continue;
1688 }
1689
1690 active_list[count].value.int_val = obj->integer.value;
1691 active_list[count].bind_info = NULL;
1692 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1693 (int)obj->integer.value));
1694 count++;
1695 }
1696
1697 kfree(video->attached_array);
1698
1699 video->attached_array = active_list;
1700 video->attached_count = count;
1701
1702 out:
1703 kfree(buffer.pointer);
1704 return status;
1705 }
1706
1707 static int
1708 acpi_video_get_next_level(struct acpi_video_device *device,
1709 u32 level_current, u32 event)
1710 {
1711 int min, max, min_above, max_below, i, l, delta = 255;
1712 max = max_below = 0;
1713 min = min_above = 255;
1714 /* Find closest level to level_current */
1715 for (i = 0; i < device->brightness->count; i++) {
1716 l = device->brightness->levels[i];
1717 if (abs(l - level_current) < abs(delta)) {
1718 delta = l - level_current;
1719 if (!delta)
1720 break;
1721 }
1722 }
1723 /* Ajust level_current to closest available level */
1724 level_current += delta;
1725 for (i = 0; i < device->brightness->count; i++) {
1726 l = device->brightness->levels[i];
1727 if (l < min)
1728 min = l;
1729 if (l > max)
1730 max = l;
1731 if (l < min_above && l > level_current)
1732 min_above = l;
1733 if (l > max_below && l < level_current)
1734 max_below = l;
1735 }
1736
1737 switch (event) {
1738 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1739 return (level_current < max) ? min_above : min;
1740 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1741 return (level_current < max) ? min_above : max;
1742 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1743 return (level_current > min) ? max_below : min;
1744 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1745 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1746 return 0;
1747 default:
1748 return level_current;
1749 }
1750 }
1751
1752 static void
1753 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1754 {
1755 unsigned long long level_current, level_next;
1756 if (!device->brightness)
1757 return;
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 printk(KERN_WARNING PREFIX
1777 "Cant attach device");
1778 continue;
1779 }
1780 }
1781 return status;
1782 }
1783
1784 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1785 {
1786 acpi_status status;
1787 struct acpi_video_bus *video;
1788
1789
1790 if (!device || !device->video)
1791 return -ENOENT;
1792
1793 video = device->video;
1794
1795 acpi_video_device_remove_fs(device->dev);
1796
1797 status = acpi_remove_notify_handler(device->dev->handle,
1798 ACPI_DEVICE_NOTIFY,
1799 acpi_video_device_notify);
1800 backlight_device_unregister(device->backlight);
1801 if (device->cdev) {
1802 sysfs_remove_link(&device->dev->dev.kobj,
1803 "thermal_cooling");
1804 sysfs_remove_link(&device->cdev->device.kobj,
1805 "device");
1806 thermal_cooling_device_unregister(device->cdev);
1807 device->cdev = NULL;
1808 }
1809 video_output_unregister(device->output_dev);
1810
1811 return 0;
1812 }
1813
1814 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1815 {
1816 int status;
1817 struct acpi_video_device *dev, *next;
1818
1819 mutex_lock(&video->device_list_lock);
1820
1821 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1822
1823 status = acpi_video_bus_put_one_device(dev);
1824 if (ACPI_FAILURE(status))
1825 printk(KERN_WARNING PREFIX
1826 "hhuuhhuu bug in acpi video driver.\n");
1827
1828 if (dev->brightness) {
1829 kfree(dev->brightness->levels);
1830 kfree(dev->brightness);
1831 }
1832 list_del(&dev->entry);
1833 kfree(dev);
1834 }
1835
1836 mutex_unlock(&video->device_list_lock);
1837
1838 return 0;
1839 }
1840
1841 /* acpi_video interface */
1842
1843 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1844 {
1845 return acpi_video_bus_DOS(video, 0, 0);
1846 }
1847
1848 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1849 {
1850 return acpi_video_bus_DOS(video, 0, 1);
1851 }
1852
1853 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1854 {
1855 struct acpi_video_bus *video = data;
1856 struct acpi_device *device = NULL;
1857 struct input_dev *input;
1858 int keycode;
1859
1860 if (!video)
1861 return;
1862
1863 device = video->device;
1864 input = video->input;
1865
1866 switch (event) {
1867 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1868 * most likely via hotkey. */
1869 acpi_bus_generate_proc_event(device, event, 0);
1870 keycode = KEY_SWITCHVIDEOMODE;
1871 break;
1872
1873 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1874 * connector. */
1875 acpi_video_device_enumerate(video);
1876 acpi_video_device_rebind(video);
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_bus_generate_proc_event(device, event, 0);
1883 keycode = KEY_SWITCHVIDEOMODE;
1884 break;
1885 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1886 acpi_bus_generate_proc_event(device, event, 0);
1887 keycode = KEY_VIDEO_NEXT;
1888 break;
1889 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1890 acpi_bus_generate_proc_event(device, event, 0);
1891 keycode = KEY_VIDEO_PREV;
1892 break;
1893
1894 default:
1895 keycode = KEY_UNKNOWN;
1896 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1897 "Unsupported event [0x%x]\n", event));
1898 break;
1899 }
1900
1901 acpi_notifier_call_chain(device, event, 0);
1902 input_report_key(input, keycode, 1);
1903 input_sync(input);
1904 input_report_key(input, keycode, 0);
1905 input_sync(input);
1906
1907 return;
1908 }
1909
1910 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1911 {
1912 struct acpi_video_device *video_device = data;
1913 struct acpi_device *device = NULL;
1914 struct acpi_video_bus *bus;
1915 struct input_dev *input;
1916 int keycode;
1917
1918 if (!video_device)
1919 return;
1920
1921 device = video_device->dev;
1922 bus = video_device->video;
1923 input = bus->input;
1924
1925 switch (event) {
1926 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1927 if (brightness_switch_enabled)
1928 acpi_video_switch_brightness(video_device, event);
1929 acpi_bus_generate_proc_event(device, event, 0);
1930 keycode = KEY_BRIGHTNESS_CYCLE;
1931 break;
1932 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1933 if (brightness_switch_enabled)
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 if (brightness_switch_enabled)
1940 acpi_video_switch_brightness(video_device, event);
1941 acpi_bus_generate_proc_event(device, event, 0);
1942 keycode = KEY_BRIGHTNESSDOWN;
1943 break;
1944 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1945 if (brightness_switch_enabled)
1946 acpi_video_switch_brightness(video_device, event);
1947 acpi_bus_generate_proc_event(device, event, 0);
1948 keycode = KEY_BRIGHTNESS_ZERO;
1949 break;
1950 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1951 if (brightness_switch_enabled)
1952 acpi_video_switch_brightness(video_device, event);
1953 acpi_bus_generate_proc_event(device, event, 0);
1954 keycode = KEY_DISPLAY_OFF;
1955 break;
1956 default:
1957 keycode = KEY_UNKNOWN;
1958 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1959 "Unsupported event [0x%x]\n", event));
1960 break;
1961 }
1962
1963 acpi_notifier_call_chain(device, event, 0);
1964 input_report_key(input, keycode, 1);
1965 input_sync(input);
1966 input_report_key(input, keycode, 0);
1967 input_sync(input);
1968
1969 return;
1970 }
1971
1972 static int instance;
1973 static int acpi_video_resume(struct acpi_device *device)
1974 {
1975 struct acpi_video_bus *video;
1976 struct acpi_video_device *video_device;
1977 int i;
1978
1979 if (!device || !acpi_driver_data(device))
1980 return -EINVAL;
1981
1982 video = acpi_driver_data(device);
1983
1984 for (i = 0; i < video->attached_count; i++) {
1985 video_device = video->attached_array[i].bind_info;
1986 if (video_device && video_device->backlight)
1987 acpi_video_set_brightness(video_device->backlight);
1988 }
1989 return AE_OK;
1990 }
1991
1992 static int acpi_video_bus_add(struct acpi_device *device)
1993 {
1994 acpi_status status;
1995 struct acpi_video_bus *video;
1996 struct input_dev *input;
1997 int error;
1998
1999 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2000 if (!video)
2001 return -ENOMEM;
2002
2003 /* a hack to fix the duplicate name "VID" problem on T61 */
2004 if (!strcmp(device->pnp.bus_id, "VID")) {
2005 if (instance)
2006 device->pnp.bus_id[3] = '0' + instance;
2007 instance ++;
2008 }
2009
2010 video->device = device;
2011 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2012 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2013 device->driver_data = video;
2014
2015 acpi_video_bus_find_cap(video);
2016 error = acpi_video_bus_check(video);
2017 if (error)
2018 goto err_free_video;
2019
2020 error = acpi_video_bus_add_fs(device);
2021 if (error)
2022 goto err_free_video;
2023
2024 mutex_init(&video->device_list_lock);
2025 INIT_LIST_HEAD(&video->video_device_list);
2026
2027 acpi_video_bus_get_devices(video, device);
2028 acpi_video_bus_start_devices(video);
2029
2030 status = acpi_install_notify_handler(device->handle,
2031 ACPI_DEVICE_NOTIFY,
2032 acpi_video_bus_notify, video);
2033 if (ACPI_FAILURE(status)) {
2034 printk(KERN_ERR PREFIX
2035 "Error installing notify handler\n");
2036 error = -ENODEV;
2037 goto err_stop_video;
2038 }
2039
2040 video->input = input = input_allocate_device();
2041 if (!input) {
2042 error = -ENOMEM;
2043 goto err_uninstall_notify;
2044 }
2045
2046 snprintf(video->phys, sizeof(video->phys),
2047 "%s/video/input0", acpi_device_hid(video->device));
2048
2049 input->name = acpi_device_name(video->device);
2050 input->phys = video->phys;
2051 input->id.bustype = BUS_HOST;
2052 input->id.product = 0x06;
2053 input->dev.parent = &device->dev;
2054 input->evbit[0] = BIT(EV_KEY);
2055 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2056 set_bit(KEY_VIDEO_NEXT, input->keybit);
2057 set_bit(KEY_VIDEO_PREV, input->keybit);
2058 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2059 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2060 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2061 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2062 set_bit(KEY_DISPLAY_OFF, input->keybit);
2063 set_bit(KEY_UNKNOWN, input->keybit);
2064
2065 error = input_register_device(input);
2066 if (error)
2067 goto err_free_input_dev;
2068
2069 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2070 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2071 video->flags.multihead ? "yes" : "no",
2072 video->flags.rom ? "yes" : "no",
2073 video->flags.post ? "yes" : "no");
2074
2075 return 0;
2076
2077 err_free_input_dev:
2078 input_free_device(input);
2079 err_uninstall_notify:
2080 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2081 acpi_video_bus_notify);
2082 err_stop_video:
2083 acpi_video_bus_stop_devices(video);
2084 acpi_video_bus_put_devices(video);
2085 kfree(video->attached_array);
2086 acpi_video_bus_remove_fs(device);
2087 err_free_video:
2088 kfree(video);
2089 device->driver_data = NULL;
2090
2091 return error;
2092 }
2093
2094 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2095 {
2096 acpi_status status = 0;
2097 struct acpi_video_bus *video = NULL;
2098
2099
2100 if (!device || !acpi_driver_data(device))
2101 return -EINVAL;
2102
2103 video = acpi_driver_data(device);
2104
2105 acpi_video_bus_stop_devices(video);
2106
2107 status = acpi_remove_notify_handler(video->device->handle,
2108 ACPI_DEVICE_NOTIFY,
2109 acpi_video_bus_notify);
2110
2111 acpi_video_bus_put_devices(video);
2112 acpi_video_bus_remove_fs(device);
2113
2114 input_unregister_device(video->input);
2115 kfree(video->attached_array);
2116 kfree(video);
2117
2118 return 0;
2119 }
2120
2121 static int __init acpi_video_init(void)
2122 {
2123 int result = 0;
2124
2125 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2126 if (!acpi_video_dir)
2127 return -ENODEV;
2128 acpi_video_dir->owner = THIS_MODULE;
2129
2130 result = acpi_bus_register_driver(&acpi_video_bus);
2131 if (result < 0) {
2132 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2133 return -ENODEV;
2134 }
2135
2136 return 0;
2137 }
2138
2139 static void __exit acpi_video_exit(void)
2140 {
2141
2142 acpi_bus_unregister_driver(&acpi_video_bus);
2143
2144 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2145
2146 return;
2147 }
2148
2149 module_init(acpi_video_init);
2150 module_exit(acpi_video_exit);
Linux kernel - Deliverables
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