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ACPI: Ignore _BQC object when registering backlight device
[linux-2.6/mini2440.git] / drivers / acpi / video.c
blobe32b6c14d9280b72328d43928ed0b6d7a08ad7a3
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <asm/uaccess.h>
40
41 #include <acpi/acpi_bus.h>
42 #include <acpi/acpi_drivers.h>
43
44 #define ACPI_VIDEO_COMPONENT 0x08000000
45 #define ACPI_VIDEO_CLASS "video"
46 #define ACPI_VIDEO_BUS_NAME "Video Bus"
47 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
48 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
49 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
50 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
51 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
52 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
53
54 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
55 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
56 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
57 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
58 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
59
60 #define MAX_NAME_LEN 20
61
62 #define ACPI_VIDEO_DISPLAY_CRT 1
63 #define ACPI_VIDEO_DISPLAY_TV 2
64 #define ACPI_VIDEO_DISPLAY_DVI 3
65 #define ACPI_VIDEO_DISPLAY_LCD 4
66
67 #define _COMPONENT ACPI_VIDEO_COMPONENT
68 ACPI_MODULE_NAME("video");
69
70 MODULE_AUTHOR("Bruno Ducrot");
71 MODULE_DESCRIPTION("ACPI Video Driver");
72 MODULE_LICENSE("GPL");
73
74 static int brightness_switch_enabled = 1;
75 module_param(brightness_switch_enabled, bool, 0644);
76
77 static int acpi_video_bus_add(struct acpi_device *device);
78 static int acpi_video_bus_remove(struct acpi_device *device, int type);
79 static int acpi_video_resume(struct acpi_device *device);
80
81 static const struct acpi_device_id video_device_ids[] = {
82 {ACPI_VIDEO_HID, 0},
83 {"", 0},
84 };
85 MODULE_DEVICE_TABLE(acpi, video_device_ids);
86
87 static struct acpi_driver acpi_video_bus = {
88 .name = "video",
89 .class = ACPI_VIDEO_CLASS,
90 .ids = video_device_ids,
91 .ops = {
92 .add = acpi_video_bus_add,
93 .remove = acpi_video_bus_remove,
94 .resume = acpi_video_resume,
95 },
96 };
97
98 struct acpi_video_bus_flags {
99 u8 multihead:1; /* can switch video heads */
100 u8 rom:1; /* can retrieve a video rom */
101 u8 post:1; /* can configure the head to */
102 u8 reserved:5;
103 };
104
105 struct acpi_video_bus_cap {
106 u8 _DOS:1; /*Enable/Disable output switching */
107 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
108 u8 _ROM:1; /*Get ROM Data */
109 u8 _GPD:1; /*Get POST Device */
110 u8 _SPD:1; /*Set POST Device */
111 u8 _VPO:1; /*Video POST Options */
112 u8 reserved:2;
113 };
114
115 struct acpi_video_device_attrib {
116 u32 display_index:4; /* A zero-based instance of the Display */
117 u32 display_port_attachment:4; /*This field differentiates the display type */
118 u32 display_type:4; /*Describe the specific type in use */
119 u32 vendor_specific:4; /*Chipset Vendor Specific */
120 u32 bios_can_detect:1; /*BIOS can detect the device */
121 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
122 the VGA device. */
123 u32 pipe_id:3; /*For VGA multiple-head devices. */
124 u32 reserved:10; /*Must be 0 */
125 u32 device_id_scheme:1; /*Device ID Scheme */
126 };
127
128 struct acpi_video_enumerated_device {
129 union {
130 u32 int_val;
131 struct acpi_video_device_attrib attrib;
132 } value;
133 struct acpi_video_device *bind_info;
134 };
135
136 struct acpi_video_bus {
137 struct acpi_device *device;
138 u8 dos_setting;
139 struct acpi_video_enumerated_device *attached_array;
140 u8 attached_count;
141 struct acpi_video_bus_cap cap;
142 struct acpi_video_bus_flags flags;
143 struct list_head video_device_list;
144 struct mutex device_list_lock; /* protects video_device_list */
145 struct proc_dir_entry *dir;
146 struct input_dev *input;
147 char phys[32]; /* for input device */
148 };
149
150 struct acpi_video_device_flags {
151 u8 crt:1;
152 u8 lcd:1;
153 u8 tvout:1;
154 u8 dvi:1;
155 u8 bios:1;
156 u8 unknown:1;
157 u8 reserved:2;
158 };
159
160 struct acpi_video_device_cap {
161 u8 _ADR:1; /*Return the unique ID */
162 u8 _BCL:1; /*Query list of brightness control levels supported */
163 u8 _BCM:1; /*Set the brightness level */
164 u8 _BQC:1; /* Get current brightness level */
165 u8 _DDC:1; /*Return the EDID for this device */
166 u8 _DCS:1; /*Return status of output device */
167 u8 _DGS:1; /*Query graphics state */
168 u8 _DSS:1; /*Device state set */
169 };
170
171 struct acpi_video_device_brightness {
172 int curr;
173 int count;
174 int *levels;
175 };
176
177 struct acpi_video_device {
178 unsigned long device_id;
179 struct acpi_video_device_flags flags;
180 struct acpi_video_device_cap cap;
181 struct list_head entry;
182 struct acpi_video_bus *video;
183 struct acpi_device *dev;
184 struct acpi_video_device_brightness *brightness;
185 struct backlight_device *backlight;
186 struct thermal_cooling_device *cdev;
187 struct output_device *output_dev;
188 };
189
190 /* bus */
191 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
192 static struct file_operations acpi_video_bus_info_fops = {
193 .owner = THIS_MODULE,
194 .open = acpi_video_bus_info_open_fs,
195 .read = seq_read,
196 .llseek = seq_lseek,
197 .release = single_release,
198 };
199
200 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
201 static struct file_operations acpi_video_bus_ROM_fops = {
202 .owner = THIS_MODULE,
203 .open = acpi_video_bus_ROM_open_fs,
204 .read = seq_read,
205 .llseek = seq_lseek,
206 .release = single_release,
207 };
208
209 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
210 struct file *file);
211 static struct file_operations acpi_video_bus_POST_info_fops = {
212 .owner = THIS_MODULE,
213 .open = acpi_video_bus_POST_info_open_fs,
214 .read = seq_read,
215 .llseek = seq_lseek,
216 .release = single_release,
217 };
218
219 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
220 static struct file_operations acpi_video_bus_POST_fops = {
221 .owner = THIS_MODULE,
222 .open = acpi_video_bus_POST_open_fs,
223 .read = seq_read,
224 .llseek = seq_lseek,
225 .release = single_release,
226 };
227
228 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
229 static struct file_operations acpi_video_bus_DOS_fops = {
230 .owner = THIS_MODULE,
231 .open = acpi_video_bus_DOS_open_fs,
232 .read = seq_read,
233 .llseek = seq_lseek,
234 .release = single_release,
235 };
236
237 /* device */
238 static int acpi_video_device_info_open_fs(struct inode *inode,
239 struct file *file);
240 static struct file_operations acpi_video_device_info_fops = {
241 .owner = THIS_MODULE,
242 .open = acpi_video_device_info_open_fs,
243 .read = seq_read,
244 .llseek = seq_lseek,
245 .release = single_release,
246 };
247
248 static int acpi_video_device_state_open_fs(struct inode *inode,
249 struct file *file);
250 static struct file_operations acpi_video_device_state_fops = {
251 .owner = THIS_MODULE,
252 .open = acpi_video_device_state_open_fs,
253 .read = seq_read,
254 .llseek = seq_lseek,
255 .release = single_release,
256 };
257
258 static int acpi_video_device_brightness_open_fs(struct inode *inode,
259 struct file *file);
260 static struct file_operations acpi_video_device_brightness_fops = {
261 .owner = THIS_MODULE,
262 .open = acpi_video_device_brightness_open_fs,
263 .read = seq_read,
264 .llseek = seq_lseek,
265 .release = single_release,
266 };
267
268 static int acpi_video_device_EDID_open_fs(struct inode *inode,
269 struct file *file);
270 static struct file_operations acpi_video_device_EDID_fops = {
271 .owner = THIS_MODULE,
272 .open = acpi_video_device_EDID_open_fs,
273 .read = seq_read,
274 .llseek = seq_lseek,
275 .release = single_release,
276 };
277
278 static char device_decode[][30] = {
279 "motherboard VGA device",
280 "PCI VGA device",
281 "AGP VGA device",
282 "UNKNOWN",
283 };
284
285 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
286 static void acpi_video_device_rebind(struct acpi_video_bus *video);
287 static void acpi_video_device_bind(struct acpi_video_bus *video,
288 struct acpi_video_device *device);
289 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
290 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
291 int level);
292 static int acpi_video_device_lcd_get_level_current(
293 struct acpi_video_device *device,
294 unsigned long *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 *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 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 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 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 *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 *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 ret;
440
441
442 arg0.integer.value = state;
443 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
444
445 return status;
446 }
447
448 static int
449 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
450 union acpi_object **levels)
451 {
452 int status;
453 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
454 union acpi_object *obj;
455
456
457 *levels = NULL;
458
459 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
460 if (!ACPI_SUCCESS(status))
461 return status;
462 obj = (union acpi_object *)buffer.pointer;
463 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
464 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
465 status = -EFAULT;
466 goto err;
467 }
468
469 *levels = obj;
470
471 return 0;
472
473 err:
474 kfree(buffer.pointer);
475
476 return status;
477 }
478
479 static int
480 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
481 {
482 int status = AE_OK;
483 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
484 struct acpi_object_list args = { 1, &arg0 };
485
486
487 arg0.integer.value = level;
488
489 if (device->cap._BCM)
490 status = acpi_evaluate_object(device->dev->handle, "_BCM",
491 &args, NULL);
492 device->brightness->curr = level;
493 return status;
494 }
495
496 static int
497 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
498 unsigned long *level)
499 {
500 if (device->cap._BQC)
501 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
502 level);
503 *level = device->brightness->curr;
504 return AE_OK;
505 }
506
507 static int
508 acpi_video_device_EDID(struct acpi_video_device *device,
509 union acpi_object **edid, ssize_t length)
510 {
511 int status;
512 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
513 union acpi_object *obj;
514 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
515 struct acpi_object_list args = { 1, &arg0 };
516
517
518 *edid = NULL;
519
520 if (!device)
521 return -ENODEV;
522 if (length == 128)
523 arg0.integer.value = 1;
524 else if (length == 256)
525 arg0.integer.value = 2;
526 else
527 return -EINVAL;
528
529 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
530 if (ACPI_FAILURE(status))
531 return -ENODEV;
532
533 obj = buffer.pointer;
534
535 if (obj && obj->type == ACPI_TYPE_BUFFER)
536 *edid = obj;
537 else {
538 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
539 status = -EFAULT;
540 kfree(obj);
541 }
542
543 return status;
544 }
545
546 /* bus */
547
548 static int
549 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
550 {
551 int status;
552 unsigned long tmp;
553 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
554 struct acpi_object_list args = { 1, &arg0 };
555
556
557 arg0.integer.value = option;
558
559 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
560 if (ACPI_SUCCESS(status))
561 status = tmp ? (-EINVAL) : (AE_OK);
562
563 return status;
564 }
565
566 static int
567 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
568 {
569 int status;
570
571 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
572
573 return status;
574 }
575
576 static int
577 acpi_video_bus_POST_options(struct acpi_video_bus *video,
578 unsigned long *options)
579 {
580 int status;
581
582 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
583 *options &= 3;
584
585 return status;
586 }
587
588 /*
589 * Arg:
590 * video : video bus device pointer
591 * bios_flag :
592 * 0. The system BIOS should NOT automatically switch(toggle)
593 * the active display output.
594 * 1. The system BIOS should automatically switch (toggle) the
595 * active display output. No switch event.
596 * 2. The _DGS value should be locked.
597 * 3. The system BIOS should not automatically switch (toggle) the
598 * active display output, but instead generate the display switch
599 * event notify code.
600 * lcd_flag :
601 * 0. The system BIOS should automatically control the brightness level
602 * of the LCD when the power changes from AC to DC
603 * 1. The system BIOS should NOT automatically control the brightness
604 * level of the LCD when the power changes from AC to DC.
605 * Return Value:
606 * -1 wrong arg.
607 */
608
609 static int
610 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
611 {
612 acpi_integer status = 0;
613 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
614 struct acpi_object_list args = { 1, &arg0 };
615
616
617 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
618 status = -1;
619 goto Failed;
620 }
621 arg0.integer.value = (lcd_flag << 2) | bios_flag;
622 video->dos_setting = arg0.integer.value;
623 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
624
625 Failed:
626 return status;
627 }
628
629 /*
630 * Arg:
631 * device : video output device (LCD, CRT, ..)
632 *
633 * Return Value:
634 * Maximum brightness level
635 *
636 * Allocate and initialize device->brightness.
637 */
638
639 static int
640 acpi_video_init_brightness(struct acpi_video_device *device)
641 {
642 union acpi_object *obj = NULL;
643 int i, max_level = 0, count = 0;
644 union acpi_object *o;
645 struct acpi_video_device_brightness *br = NULL;
646
647 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
648 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
649 "LCD brightness level\n"));
650 goto out;
651 }
652
653 if (obj->package.count < 2)
654 goto out;
655
656 br = kzalloc(sizeof(*br), GFP_KERNEL);
657 if (!br) {
658 printk(KERN_ERR "can't allocate memory\n");
659 goto out;
660 }
661
662 br->levels = kmalloc(obj->package.count * sizeof *(br->levels),
663 GFP_KERNEL);
664 if (!br->levels)
665 goto out_free;
666
667 for (i = 0; i < obj->package.count; i++) {
668 o = (union acpi_object *)&obj->package.elements[i];
669 if (o->type != ACPI_TYPE_INTEGER) {
670 printk(KERN_ERR PREFIX "Invalid data\n");
671 continue;
672 }
673 br->levels[count] = (u32) o->integer.value;
674
675 if (br->levels[count] > max_level)
676 max_level = br->levels[count];
677 count++;
678 }
679
680 if (count < 2)
681 goto out_free_levels;
682
683 br->count = count;
684 device->brightness = br;
685 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "found %d brightness levels\n", count));
686 kfree(obj);
687 return max_level;
688
689 out_free_levels:
690 kfree(br->levels);
691 out_free:
692 kfree(br);
693 out:
694 device->brightness = NULL;
695 kfree(obj);
696 return 0;
697 }
698
699 /*
700 * Arg:
701 * device : video output device (LCD, CRT, ..)
702 *
703 * Return Value:
704 * None
705 *
706 * Find out all required AML methods defined under the output
707 * device.
708 */
709
710 static void acpi_video_device_find_cap(struct acpi_video_device *device)
711 {
712 acpi_handle h_dummy1;
713 u32 max_level = 0;
714
715
716 memset(&device->cap, 0, sizeof(device->cap));
717
718 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
719 device->cap._ADR = 1;
720 }
721 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
722 device->cap._BCL = 1;
723 }
724 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
725 device->cap._BCM = 1;
726 }
727 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
728 device->cap._BQC = 1;
729 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
730 device->cap._DDC = 1;
731 }
732 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
733 device->cap._DCS = 1;
734 }
735 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
736 device->cap._DGS = 1;
737 }
738 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
739 device->cap._DSS = 1;
740 }
741
742 max_level = acpi_video_init_brightness(device);
743
744 if (device->cap._BCL && device->cap._BCM && max_level > 0) {
745 int result;
746 static int count = 0;
747 char *name;
748 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
749 if (!name)
750 return;
751
752 sprintf(name, "acpi_video%d", count++);
753 device->backlight = backlight_device_register(name,
754 NULL, device, &acpi_backlight_ops);
755 device->backlight->props.max_brightness = device->brightness->count-3;
756 /*
757 * If there exists the _BQC object, the _BQC object will be
758 * called to get the current backlight brightness. Otherwise
759 * the brightness will be set to the maximum.
760 */
761 if (device->cap._BQC)
762 device->backlight->props.brightness =
763 acpi_video_get_brightness(device->backlight);
764 else
765 device->backlight->props.brightness =
766 device->backlight->props.max_brightness;
767 backlight_update_status(device->backlight);
768 kfree(name);
769
770 device->cdev = thermal_cooling_device_register("LCD",
771 device->dev, &video_cooling_ops);
772 if (IS_ERR(device->cdev))
773 return;
774
775 printk(KERN_INFO PREFIX
776 "%s is registered as cooling_device%d\n",
777 device->dev->dev.bus_id, device->cdev->id);
778 result = sysfs_create_link(&device->dev->dev.kobj,
779 &device->cdev->device.kobj,
780 "thermal_cooling");
781 if (result)
782 printk(KERN_ERR PREFIX "Create sysfs link\n");
783 result = sysfs_create_link(&device->cdev->device.kobj,
784 &device->dev->dev.kobj, "device");
785 if (result)
786 printk(KERN_ERR PREFIX "Create sysfs link\n");
787
788 }
789 if (device->cap._DCS && device->cap._DSS){
790 static int count = 0;
791 char *name;
792 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
793 if (!name)
794 return;
795 sprintf(name, "acpi_video%d", count++);
796 device->output_dev = video_output_register(name,
797 NULL, device, &acpi_output_properties);
798 kfree(name);
799 }
800 return;
801 }
802
803 /*
804 * Arg:
805 * device : video output device (VGA)
806 *
807 * Return Value:
808 * None
809 *
810 * Find out all required AML methods defined under the video bus device.
811 */
812
813 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
814 {
815 acpi_handle h_dummy1;
816
817 memset(&video->cap, 0, sizeof(video->cap));
818 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
819 video->cap._DOS = 1;
820 }
821 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
822 video->cap._DOD = 1;
823 }
824 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
825 video->cap._ROM = 1;
826 }
827 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
828 video->cap._GPD = 1;
829 }
830 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
831 video->cap._SPD = 1;
832 }
833 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
834 video->cap._VPO = 1;
835 }
836 }
837
838 /*
839 * Check whether the video bus device has required AML method to
840 * support the desired features
841 */
842
843 static int acpi_video_bus_check(struct acpi_video_bus *video)
844 {
845 acpi_status status = -ENOENT;
846
847
848 if (!video)
849 return -EINVAL;
850
851 /* Since there is no HID, CID and so on for VGA driver, we have
852 * to check well known required nodes.
853 */
854
855 /* Does this device support video switching? */
856 if (video->cap._DOS) {
857 video->flags.multihead = 1;
858 status = 0;
859 }
860
861 /* Does this device support retrieving a video ROM? */
862 if (video->cap._ROM) {
863 video->flags.rom = 1;
864 status = 0;
865 }
866
867 /* Does this device support configuring which video device to POST? */
868 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
869 video->flags.post = 1;
870 status = 0;
871 }
872
873 return status;
874 }
875
876 /* --------------------------------------------------------------------------
877 FS Interface (/proc)
878 -------------------------------------------------------------------------- */
879
880 static struct proc_dir_entry *acpi_video_dir;
881
882 /* video devices */
883
884 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
885 {
886 struct acpi_video_device *dev = seq->private;
887
888
889 if (!dev)
890 goto end;
891
892 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
893 seq_printf(seq, "type: ");
894 if (dev->flags.crt)
895 seq_printf(seq, "CRT\n");
896 else if (dev->flags.lcd)
897 seq_printf(seq, "LCD\n");
898 else if (dev->flags.tvout)
899 seq_printf(seq, "TVOUT\n");
900 else if (dev->flags.dvi)
901 seq_printf(seq, "DVI\n");
902 else
903 seq_printf(seq, "UNKNOWN\n");
904
905 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
906
907 end:
908 return 0;
909 }
910
911 static int
912 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
913 {
914 return single_open(file, acpi_video_device_info_seq_show,
915 PDE(inode)->data);
916 }
917
918 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
919 {
920 int status;
921 struct acpi_video_device *dev = seq->private;
922 unsigned long state;
923
924
925 if (!dev)
926 goto end;
927
928 status = acpi_video_device_get_state(dev, &state);
929 seq_printf(seq, "state: ");
930 if (ACPI_SUCCESS(status))
931 seq_printf(seq, "0x%02lx\n", state);
932 else
933 seq_printf(seq, "<not supported>\n");
934
935 status = acpi_video_device_query(dev, &state);
936 seq_printf(seq, "query: ");
937 if (ACPI_SUCCESS(status))
938 seq_printf(seq, "0x%02lx\n", state);
939 else
940 seq_printf(seq, "<not supported>\n");
941
942 end:
943 return 0;
944 }
945
946 static int
947 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
948 {
949 return single_open(file, acpi_video_device_state_seq_show,
950 PDE(inode)->data);
951 }
952
953 static ssize_t
954 acpi_video_device_write_state(struct file *file,
955 const char __user * buffer,
956 size_t count, loff_t * data)
957 {
958 int status;
959 struct seq_file *m = file->private_data;
960 struct acpi_video_device *dev = m->private;
961 char str[12] = { 0 };
962 u32 state = 0;
963
964
965 if (!dev || count + 1 > sizeof str)
966 return -EINVAL;
967
968 if (copy_from_user(str, buffer, count))
969 return -EFAULT;
970
971 str[count] = 0;
972 state = simple_strtoul(str, NULL, 0);
973 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
974
975 status = acpi_video_device_set_state(dev, state);
976
977 if (status)
978 return -EFAULT;
979
980 return count;
981 }
982
983 static int
984 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
985 {
986 struct acpi_video_device *dev = seq->private;
987 int i;
988
989
990 if (!dev || !dev->brightness) {
991 seq_printf(seq, "<not supported>\n");
992 return 0;
993 }
994
995 seq_printf(seq, "levels: ");
996 for (i = 0; i < dev->brightness->count; i++)
997 seq_printf(seq, " %d", dev->brightness->levels[i]);
998 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
999
1000 return 0;
1001 }
1002
1003 static int
1004 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1005 {
1006 return single_open(file, acpi_video_device_brightness_seq_show,
1007 PDE(inode)->data);
1008 }
1009
1010 static ssize_t
1011 acpi_video_device_write_brightness(struct file *file,
1012 const char __user * buffer,
1013 size_t count, loff_t * data)
1014 {
1015 struct seq_file *m = file->private_data;
1016 struct acpi_video_device *dev = m->private;
1017 char str[5] = { 0 };
1018 unsigned int level = 0;
1019 int i;
1020
1021
1022 if (!dev || !dev->brightness || count + 1 > sizeof str)
1023 return -EINVAL;
1024
1025 if (copy_from_user(str, buffer, count))
1026 return -EFAULT;
1027
1028 str[count] = 0;
1029 level = simple_strtoul(str, NULL, 0);
1030
1031 if (level > 100)
1032 return -EFAULT;
1033
1034 /* validate through the list of available levels */
1035 for (i = 0; i < dev->brightness->count; i++)
1036 if (level == dev->brightness->levels[i]) {
1037 if (ACPI_SUCCESS
1038 (acpi_video_device_lcd_set_level(dev, level)))
1039 dev->brightness->curr = level;
1040 break;
1041 }
1042
1043 return count;
1044 }
1045
1046 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1047 {
1048 struct acpi_video_device *dev = seq->private;
1049 int status;
1050 int i;
1051 union acpi_object *edid = NULL;
1052
1053
1054 if (!dev)
1055 goto out;
1056
1057 status = acpi_video_device_EDID(dev, &edid, 128);
1058 if (ACPI_FAILURE(status)) {
1059 status = acpi_video_device_EDID(dev, &edid, 256);
1060 }
1061
1062 if (ACPI_FAILURE(status)) {
1063 goto out;
1064 }
1065
1066 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1067 for (i = 0; i < edid->buffer.length; i++)
1068 seq_putc(seq, edid->buffer.pointer[i]);
1069 }
1070
1071 out:
1072 if (!edid)
1073 seq_printf(seq, "<not supported>\n");
1074 else
1075 kfree(edid);
1076
1077 return 0;
1078 }
1079
1080 static int
1081 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1082 {
1083 return single_open(file, acpi_video_device_EDID_seq_show,
1084 PDE(inode)->data);
1085 }
1086
1087 static int acpi_video_device_add_fs(struct acpi_device *device)
1088 {
1089 struct proc_dir_entry *entry, *device_dir;
1090 struct acpi_video_device *vid_dev;
1091
1092 vid_dev = acpi_driver_data(device);
1093 if (!vid_dev)
1094 return -ENODEV;
1095
1096 device_dir = proc_mkdir(acpi_device_bid(device),
1097 vid_dev->video->dir);
1098 if (!device_dir)
1099 return -ENOMEM;
1100
1101 device_dir->owner = THIS_MODULE;
1102
1103 /* 'info' [R] */
1104 entry = proc_create_data("info", S_IRUGO, device_dir,
1105 &acpi_video_device_info_fops, acpi_driver_data(device));
1106 if (!entry)
1107 goto err_remove_dir;
1108
1109 /* 'state' [R/W] */
1110 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1111 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1112 device_dir,
1113 &acpi_video_device_state_fops,
1114 acpi_driver_data(device));
1115 if (!entry)
1116 goto err_remove_info;
1117
1118 /* 'brightness' [R/W] */
1119 acpi_video_device_brightness_fops.write =
1120 acpi_video_device_write_brightness;
1121 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1122 device_dir,
1123 &acpi_video_device_brightness_fops,
1124 acpi_driver_data(device));
1125 if (!entry)
1126 goto err_remove_state;
1127
1128 /* 'EDID' [R] */
1129 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1130 &acpi_video_device_EDID_fops,
1131 acpi_driver_data(device));
1132 if (!entry)
1133 goto err_remove_brightness;
1134
1135 acpi_device_dir(device) = device_dir;
1136
1137 return 0;
1138
1139 err_remove_brightness:
1140 remove_proc_entry("brightness", device_dir);
1141 err_remove_state:
1142 remove_proc_entry("state", device_dir);
1143 err_remove_info:
1144 remove_proc_entry("info", device_dir);
1145 err_remove_dir:
1146 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1147 return -ENOMEM;
1148 }
1149
1150 static int acpi_video_device_remove_fs(struct acpi_device *device)
1151 {
1152 struct acpi_video_device *vid_dev;
1153 struct proc_dir_entry *device_dir;
1154
1155 vid_dev = acpi_driver_data(device);
1156 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1157 return -ENODEV;
1158
1159 device_dir = acpi_device_dir(device);
1160 if (device_dir) {
1161 remove_proc_entry("info", device_dir);
1162 remove_proc_entry("state", device_dir);
1163 remove_proc_entry("brightness", device_dir);
1164 remove_proc_entry("EDID", device_dir);
1165 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1166 acpi_device_dir(device) = NULL;
1167 }
1168
1169 return 0;
1170 }
1171
1172 /* video bus */
1173 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1174 {
1175 struct acpi_video_bus *video = seq->private;
1176
1177
1178 if (!video)
1179 goto end;
1180
1181 seq_printf(seq, "Switching heads: %s\n",
1182 video->flags.multihead ? "yes" : "no");
1183 seq_printf(seq, "Video ROM: %s\n",
1184 video->flags.rom ? "yes" : "no");
1185 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1186 video->flags.post ? "yes" : "no");
1187
1188 end:
1189 return 0;
1190 }
1191
1192 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1193 {
1194 return single_open(file, acpi_video_bus_info_seq_show,
1195 PDE(inode)->data);
1196 }
1197
1198 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1199 {
1200 struct acpi_video_bus *video = seq->private;
1201
1202
1203 if (!video)
1204 goto end;
1205
1206 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1207 seq_printf(seq, "<TODO>\n");
1208
1209 end:
1210 return 0;
1211 }
1212
1213 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1214 {
1215 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1216 }
1217
1218 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1219 {
1220 struct acpi_video_bus *video = seq->private;
1221 unsigned long options;
1222 int status;
1223
1224
1225 if (!video)
1226 goto end;
1227
1228 status = acpi_video_bus_POST_options(video, &options);
1229 if (ACPI_SUCCESS(status)) {
1230 if (!(options & 1)) {
1231 printk(KERN_WARNING PREFIX
1232 "The motherboard VGA device is not listed as a possible POST device.\n");
1233 printk(KERN_WARNING PREFIX
1234 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1235 }
1236 printk("%lx\n", options);
1237 seq_printf(seq, "can POST: <integrated video>");
1238 if (options & 2)
1239 seq_printf(seq, " <PCI video>");
1240 if (options & 4)
1241 seq_printf(seq, " <AGP video>");
1242 seq_putc(seq, '\n');
1243 } else
1244 seq_printf(seq, "<not supported>\n");
1245 end:
1246 return 0;
1247 }
1248
1249 static int
1250 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1251 {
1252 return single_open(file, acpi_video_bus_POST_info_seq_show,
1253 PDE(inode)->data);
1254 }
1255
1256 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1257 {
1258 struct acpi_video_bus *video = seq->private;
1259 int status;
1260 unsigned long id;
1261
1262
1263 if (!video)
1264 goto end;
1265
1266 status = acpi_video_bus_get_POST(video, &id);
1267 if (!ACPI_SUCCESS(status)) {
1268 seq_printf(seq, "<not supported>\n");
1269 goto end;
1270 }
1271 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1272
1273 end:
1274 return 0;
1275 }
1276
1277 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1278 {
1279 struct acpi_video_bus *video = seq->private;
1280
1281
1282 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1283
1284 return 0;
1285 }
1286
1287 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1288 {
1289 return single_open(file, acpi_video_bus_POST_seq_show,
1290 PDE(inode)->data);
1291 }
1292
1293 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1294 {
1295 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1296 }
1297
1298 static ssize_t
1299 acpi_video_bus_write_POST(struct file *file,
1300 const char __user * buffer,
1301 size_t count, loff_t * data)
1302 {
1303 int status;
1304 struct seq_file *m = file->private_data;
1305 struct acpi_video_bus *video = m->private;
1306 char str[12] = { 0 };
1307 unsigned long opt, options;
1308
1309
1310 if (!video || count + 1 > sizeof str)
1311 return -EINVAL;
1312
1313 status = acpi_video_bus_POST_options(video, &options);
1314 if (!ACPI_SUCCESS(status))
1315 return -EINVAL;
1316
1317 if (copy_from_user(str, buffer, count))
1318 return -EFAULT;
1319
1320 str[count] = 0;
1321 opt = strtoul(str, NULL, 0);
1322 if (opt > 3)
1323 return -EFAULT;
1324
1325 /* just in case an OEM 'forgot' the motherboard... */
1326 options |= 1;
1327
1328 if (options & (1ul << opt)) {
1329 status = acpi_video_bus_set_POST(video, opt);
1330 if (!ACPI_SUCCESS(status))
1331 return -EFAULT;
1332
1333 }
1334
1335 return count;
1336 }
1337
1338 static ssize_t
1339 acpi_video_bus_write_DOS(struct file *file,
1340 const char __user * buffer,
1341 size_t count, loff_t * data)
1342 {
1343 int status;
1344 struct seq_file *m = file->private_data;
1345 struct acpi_video_bus *video = m->private;
1346 char str[12] = { 0 };
1347 unsigned long opt;
1348
1349
1350 if (!video || count + 1 > sizeof str)
1351 return -EINVAL;
1352
1353 if (copy_from_user(str, buffer, count))
1354 return -EFAULT;
1355
1356 str[count] = 0;
1357 opt = strtoul(str, NULL, 0);
1358 if (opt > 7)
1359 return -EFAULT;
1360
1361 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1362
1363 if (!ACPI_SUCCESS(status))
1364 return -EFAULT;
1365
1366 return count;
1367 }
1368
1369 static int acpi_video_bus_add_fs(struct acpi_device *device)
1370 {
1371 struct acpi_video_bus *video = acpi_driver_data(device);
1372 struct proc_dir_entry *device_dir;
1373 struct proc_dir_entry *entry;
1374
1375 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1376 if (!device_dir)
1377 return -ENOMEM;
1378
1379 device_dir->owner = THIS_MODULE;
1380
1381 /* 'info' [R] */
1382 entry = proc_create_data("info", S_IRUGO, device_dir,
1383 &acpi_video_bus_info_fops,
1384 acpi_driver_data(device));
1385 if (!entry)
1386 goto err_remove_dir;
1387
1388 /* 'ROM' [R] */
1389 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1390 &acpi_video_bus_ROM_fops,
1391 acpi_driver_data(device));
1392 if (!entry)
1393 goto err_remove_info;
1394
1395 /* 'POST_info' [R] */
1396 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1397 &acpi_video_bus_POST_info_fops,
1398 acpi_driver_data(device));
1399 if (!entry)
1400 goto err_remove_rom;
1401
1402 /* 'POST' [R/W] */
1403 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1404 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1405 device_dir,
1406 &acpi_video_bus_POST_fops,
1407 acpi_driver_data(device));
1408 if (!entry)
1409 goto err_remove_post_info;
1410
1411 /* 'DOS' [R/W] */
1412 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1413 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1414 device_dir,
1415 &acpi_video_bus_DOS_fops,
1416 acpi_driver_data(device));
1417 if (!entry)
1418 goto err_remove_post;
1419
1420 video->dir = acpi_device_dir(device) = device_dir;
1421 return 0;
1422
1423 err_remove_post:
1424 remove_proc_entry("POST", device_dir);
1425 err_remove_post_info:
1426 remove_proc_entry("POST_info", device_dir);
1427 err_remove_rom:
1428 remove_proc_entry("ROM", device_dir);
1429 err_remove_info:
1430 remove_proc_entry("info", device_dir);
1431 err_remove_dir:
1432 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1433 return -ENOMEM;
1434 }
1435
1436 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1437 {
1438 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1439
1440 if (device_dir) {
1441 remove_proc_entry("info", device_dir);
1442 remove_proc_entry("ROM", device_dir);
1443 remove_proc_entry("POST_info", device_dir);
1444 remove_proc_entry("POST", device_dir);
1445 remove_proc_entry("DOS", device_dir);
1446 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1447 acpi_device_dir(device) = NULL;
1448 }
1449
1450 return 0;
1451 }
1452
1453 /* --------------------------------------------------------------------------
1454 Driver Interface
1455 -------------------------------------------------------------------------- */
1456
1457 /* device interface */
1458 static struct acpi_video_device_attrib*
1459 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1460 {
1461 struct acpi_video_enumerated_device *ids;
1462 int i;
1463
1464 for (i = 0; i < video->attached_count; i++) {
1465 ids = &video->attached_array[i];
1466 if ((ids->value.int_val & 0xffff) == device_id)
1467 return &ids->value.attrib;
1468 }
1469
1470 return NULL;
1471 }
1472
1473 static int
1474 acpi_video_bus_get_one_device(struct acpi_device *device,
1475 struct acpi_video_bus *video)
1476 {
1477 unsigned long device_id;
1478 int status;
1479 struct acpi_video_device *data;
1480 struct acpi_video_device_attrib* attribute;
1481
1482 if (!device || !video)
1483 return -EINVAL;
1484
1485 status =
1486 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1487 if (ACPI_SUCCESS(status)) {
1488
1489 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1490 if (!data)
1491 return -ENOMEM;
1492
1493 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1494 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1495 acpi_driver_data(device) = data;
1496
1497 data->device_id = device_id;
1498 data->video = video;
1499 data->dev = device;
1500
1501 attribute = acpi_video_get_device_attr(video, device_id);
1502
1503 if((attribute != NULL) && attribute->device_id_scheme) {
1504 switch (attribute->display_type) {
1505 case ACPI_VIDEO_DISPLAY_CRT:
1506 data->flags.crt = 1;
1507 break;
1508 case ACPI_VIDEO_DISPLAY_TV:
1509 data->flags.tvout = 1;
1510 break;
1511 case ACPI_VIDEO_DISPLAY_DVI:
1512 data->flags.dvi = 1;
1513 break;
1514 case ACPI_VIDEO_DISPLAY_LCD:
1515 data->flags.lcd = 1;
1516 break;
1517 default:
1518 data->flags.unknown = 1;
1519 break;
1520 }
1521 if(attribute->bios_can_detect)
1522 data->flags.bios = 1;
1523 } else
1524 data->flags.unknown = 1;
1525
1526 acpi_video_device_bind(video, data);
1527 acpi_video_device_find_cap(data);
1528
1529 status = acpi_install_notify_handler(device->handle,
1530 ACPI_DEVICE_NOTIFY,
1531 acpi_video_device_notify,
1532 data);
1533 if (ACPI_FAILURE(status)) {
1534 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1535 "Error installing notify handler\n"));
1536 if(data->brightness)
1537 kfree(data->brightness->levels);
1538 kfree(data->brightness);
1539 kfree(data);
1540 return -ENODEV;
1541 }
1542
1543 mutex_lock(&video->device_list_lock);
1544 list_add_tail(&data->entry, &video->video_device_list);
1545 mutex_unlock(&video->device_list_lock);
1546
1547 acpi_video_device_add_fs(device);
1548
1549 return 0;
1550 }
1551
1552 return -ENOENT;
1553 }
1554
1555 /*
1556 * Arg:
1557 * video : video bus device
1558 *
1559 * Return:
1560 * none
1561 *
1562 * Enumerate the video device list of the video bus,
1563 * bind the ids with the corresponding video devices
1564 * under the video bus.
1565 */
1566
1567 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1568 {
1569 struct acpi_video_device *dev;
1570
1571 mutex_lock(&video->device_list_lock);
1572
1573 list_for_each_entry(dev, &video->video_device_list, entry)
1574 acpi_video_device_bind(video, dev);
1575
1576 mutex_unlock(&video->device_list_lock);
1577 }
1578
1579 /*
1580 * Arg:
1581 * video : video bus device
1582 * device : video output device under the video
1583 * bus
1584 *
1585 * Return:
1586 * none
1587 *
1588 * Bind the ids with the corresponding video devices
1589 * under the video bus.
1590 */
1591
1592 static void
1593 acpi_video_device_bind(struct acpi_video_bus *video,
1594 struct acpi_video_device *device)
1595 {
1596 struct acpi_video_enumerated_device *ids;
1597 int i;
1598
1599 for (i = 0; i < video->attached_count; i++) {
1600 ids = &video->attached_array[i];
1601 if (device->device_id == (ids->value.int_val & 0xffff)) {
1602 ids->bind_info = device;
1603 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1604 }
1605 }
1606 }
1607
1608 /*
1609 * Arg:
1610 * video : video bus device
1611 *
1612 * Return:
1613 * < 0 : error
1614 *
1615 * Call _DOD to enumerate all devices attached to display adapter
1616 *
1617 */
1618
1619 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1620 {
1621 int status;
1622 int count;
1623 int i;
1624 struct acpi_video_enumerated_device *active_list;
1625 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1626 union acpi_object *dod = NULL;
1627 union acpi_object *obj;
1628
1629 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1630 if (!ACPI_SUCCESS(status)) {
1631 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1632 return status;
1633 }
1634
1635 dod = buffer.pointer;
1636 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1637 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1638 status = -EFAULT;
1639 goto out;
1640 }
1641
1642 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1643 dod->package.count));
1644
1645 active_list = kcalloc(1 + dod->package.count,
1646 sizeof(struct acpi_video_enumerated_device),
1647 GFP_KERNEL);
1648 if (!active_list) {
1649 status = -ENOMEM;
1650 goto out;
1651 }
1652
1653 count = 0;
1654 for (i = 0; i < dod->package.count; i++) {
1655 obj = &dod->package.elements[i];
1656
1657 if (obj->type != ACPI_TYPE_INTEGER) {
1658 printk(KERN_ERR PREFIX
1659 "Invalid _DOD data in element %d\n", i);
1660 continue;
1661 }
1662
1663 active_list[count].value.int_val = obj->integer.value;
1664 active_list[count].bind_info = NULL;
1665 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1666 (int)obj->integer.value));
1667 count++;
1668 }
1669
1670 kfree(video->attached_array);
1671
1672 video->attached_array = active_list;
1673 video->attached_count = count;
1674
1675 out:
1676 kfree(buffer.pointer);
1677 return status;
1678 }
1679
1680 static int
1681 acpi_video_get_next_level(struct acpi_video_device *device,
1682 u32 level_current, u32 event)
1683 {
1684 int min, max, min_above, max_below, i, l, delta = 255;
1685 max = max_below = 0;
1686 min = min_above = 255;
1687 /* Find closest level to level_current */
1688 for (i = 0; i < device->brightness->count; i++) {
1689 l = device->brightness->levels[i];
1690 if (abs(l - level_current) < abs(delta)) {
1691 delta = l - level_current;
1692 if (!delta)
1693 break;
1694 }
1695 }
1696 /* Ajust level_current to closest available level */
1697 level_current += delta;
1698 for (i = 0; i < device->brightness->count; i++) {
1699 l = device->brightness->levels[i];
1700 if (l < min)
1701 min = l;
1702 if (l > max)
1703 max = l;
1704 if (l < min_above && l > level_current)
1705 min_above = l;
1706 if (l > max_below && l < level_current)
1707 max_below = l;
1708 }
1709
1710 switch (event) {
1711 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1712 return (level_current < max) ? min_above : min;
1713 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1714 return (level_current < max) ? min_above : max;
1715 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1716 return (level_current > min) ? max_below : min;
1717 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1718 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1719 return 0;
1720 default:
1721 return level_current;
1722 }
1723 }
1724
1725 static void
1726 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1727 {
1728 unsigned long level_current, level_next;
1729 if (!device->brightness)
1730 return;
1731 acpi_video_device_lcd_get_level_current(device, &level_current);
1732 level_next = acpi_video_get_next_level(device, level_current, event);
1733 acpi_video_device_lcd_set_level(device, level_next);
1734 }
1735
1736 static int
1737 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1738 struct acpi_device *device)
1739 {
1740 int status = 0;
1741 struct acpi_device *dev;
1742
1743 acpi_video_device_enumerate(video);
1744
1745 list_for_each_entry(dev, &device->children, node) {
1746
1747 status = acpi_video_bus_get_one_device(dev, video);
1748 if (ACPI_FAILURE(status)) {
1749 ACPI_DEBUG_PRINT((ACPI_DB_WARN,
1750 "Cant attach device"));
1751 continue;
1752 }
1753 }
1754 return status;
1755 }
1756
1757 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1758 {
1759 acpi_status status;
1760 struct acpi_video_bus *video;
1761
1762
1763 if (!device || !device->video)
1764 return -ENOENT;
1765
1766 video = device->video;
1767
1768 acpi_video_device_remove_fs(device->dev);
1769
1770 status = acpi_remove_notify_handler(device->dev->handle,
1771 ACPI_DEVICE_NOTIFY,
1772 acpi_video_device_notify);
1773 backlight_device_unregister(device->backlight);
1774 if (device->cdev) {
1775 sysfs_remove_link(&device->dev->dev.kobj,
1776 "thermal_cooling");
1777 sysfs_remove_link(&device->cdev->device.kobj,
1778 "device");
1779 thermal_cooling_device_unregister(device->cdev);
1780 device->cdev = NULL;
1781 }
1782 video_output_unregister(device->output_dev);
1783
1784 return 0;
1785 }
1786
1787 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1788 {
1789 int status;
1790 struct acpi_video_device *dev, *next;
1791
1792 mutex_lock(&video->device_list_lock);
1793
1794 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1795
1796 status = acpi_video_bus_put_one_device(dev);
1797 if (ACPI_FAILURE(status))
1798 printk(KERN_WARNING PREFIX
1799 "hhuuhhuu bug in acpi video driver.\n");
1800
1801 if (dev->brightness) {
1802 kfree(dev->brightness->levels);
1803 kfree(dev->brightness);
1804 }
1805 list_del(&dev->entry);
1806 kfree(dev);
1807 }
1808
1809 mutex_unlock(&video->device_list_lock);
1810
1811 return 0;
1812 }
1813
1814 /* acpi_video interface */
1815
1816 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1817 {
1818 return acpi_video_bus_DOS(video, 0, 0);
1819 }
1820
1821 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1822 {
1823 return acpi_video_bus_DOS(video, 0, 1);
1824 }
1825
1826 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1827 {
1828 struct acpi_video_bus *video = data;
1829 struct acpi_device *device = NULL;
1830 struct input_dev *input;
1831 int keycode;
1832
1833 if (!video)
1834 return;
1835
1836 device = video->device;
1837 input = video->input;
1838
1839 switch (event) {
1840 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1841 * most likely via hotkey. */
1842 acpi_bus_generate_proc_event(device, event, 0);
1843 keycode = KEY_SWITCHVIDEOMODE;
1844 break;
1845
1846 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1847 * connector. */
1848 acpi_video_device_enumerate(video);
1849 acpi_video_device_rebind(video);
1850 acpi_bus_generate_proc_event(device, event, 0);
1851 keycode = KEY_SWITCHVIDEOMODE;
1852 break;
1853
1854 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1855 acpi_bus_generate_proc_event(device, event, 0);
1856 keycode = KEY_SWITCHVIDEOMODE;
1857 break;
1858 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1859 acpi_bus_generate_proc_event(device, event, 0);
1860 keycode = KEY_VIDEO_NEXT;
1861 break;
1862 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1863 acpi_bus_generate_proc_event(device, event, 0);
1864 keycode = KEY_VIDEO_PREV;
1865 break;
1866
1867 default:
1868 keycode = KEY_UNKNOWN;
1869 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1870 "Unsupported event [0x%x]\n", event));
1871 break;
1872 }
1873
1874 acpi_notifier_call_chain(device, event, 0);
1875 input_report_key(input, keycode, 1);
1876 input_sync(input);
1877 input_report_key(input, keycode, 0);
1878 input_sync(input);
1879
1880 return;
1881 }
1882
1883 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1884 {
1885 struct acpi_video_device *video_device = data;
1886 struct acpi_device *device = NULL;
1887 struct acpi_video_bus *bus;
1888 struct input_dev *input;
1889 int keycode;
1890
1891 if (!video_device)
1892 return;
1893
1894 device = video_device->dev;
1895 bus = video_device->video;
1896 input = bus->input;
1897
1898 switch (event) {
1899 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1900 if (brightness_switch_enabled)
1901 acpi_video_switch_brightness(video_device, event);
1902 acpi_bus_generate_proc_event(device, event, 0);
1903 keycode = KEY_BRIGHTNESS_CYCLE;
1904 break;
1905 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1906 if (brightness_switch_enabled)
1907 acpi_video_switch_brightness(video_device, event);
1908 acpi_bus_generate_proc_event(device, event, 0);
1909 keycode = KEY_BRIGHTNESSUP;
1910 break;
1911 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1912 if (brightness_switch_enabled)
1913 acpi_video_switch_brightness(video_device, event);
1914 acpi_bus_generate_proc_event(device, event, 0);
1915 keycode = KEY_BRIGHTNESSDOWN;
1916 break;
1917 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1918 if (brightness_switch_enabled)
1919 acpi_video_switch_brightness(video_device, event);
1920 acpi_bus_generate_proc_event(device, event, 0);
1921 keycode = KEY_BRIGHTNESS_ZERO;
1922 break;
1923 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1924 if (brightness_switch_enabled)
1925 acpi_video_switch_brightness(video_device, event);
1926 acpi_bus_generate_proc_event(device, event, 0);
1927 keycode = KEY_DISPLAY_OFF;
1928 break;
1929 default:
1930 keycode = KEY_UNKNOWN;
1931 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1932 "Unsupported event [0x%x]\n", event));
1933 break;
1934 }
1935
1936 acpi_notifier_call_chain(device, event, 0);
1937 input_report_key(input, keycode, 1);
1938 input_sync(input);
1939 input_report_key(input, keycode, 0);
1940 input_sync(input);
1941
1942 return;
1943 }
1944
1945 static int instance;
1946 static int acpi_video_resume(struct acpi_device *device)
1947 {
1948 struct acpi_video_bus *video;
1949 struct acpi_video_device *video_device;
1950 int i;
1951
1952 if (!device || !acpi_driver_data(device))
1953 return -EINVAL;
1954
1955 video = acpi_driver_data(device);
1956
1957 for (i = 0; i < video->attached_count; i++) {
1958 video_device = video->attached_array[i].bind_info;
1959 if (video_device && video_device->backlight)
1960 acpi_video_set_brightness(video_device->backlight);
1961 }
1962 return AE_OK;
1963 }
1964
1965 static int acpi_video_bus_add(struct acpi_device *device)
1966 {
1967 acpi_status status;
1968 struct acpi_video_bus *video;
1969 struct input_dev *input;
1970 int error;
1971
1972 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1973 if (!video)
1974 return -ENOMEM;
1975
1976 /* a hack to fix the duplicate name "VID" problem on T61 */
1977 if (!strcmp(device->pnp.bus_id, "VID")) {
1978 if (instance)
1979 device->pnp.bus_id[3] = '0' + instance;
1980 instance ++;
1981 }
1982
1983 video->device = device;
1984 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1985 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1986 acpi_driver_data(device) = video;
1987
1988 acpi_video_bus_find_cap(video);
1989 error = acpi_video_bus_check(video);
1990 if (error)
1991 goto err_free_video;
1992
1993 error = acpi_video_bus_add_fs(device);
1994 if (error)
1995 goto err_free_video;
1996
1997 mutex_init(&video->device_list_lock);
1998 INIT_LIST_HEAD(&video->video_device_list);
1999
2000 acpi_video_bus_get_devices(video, device);
2001 acpi_video_bus_start_devices(video);
2002
2003 status = acpi_install_notify_handler(device->handle,
2004 ACPI_DEVICE_NOTIFY,
2005 acpi_video_bus_notify, video);
2006 if (ACPI_FAILURE(status)) {
2007 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
2008 "Error installing notify handler\n"));
2009 error = -ENODEV;
2010 goto err_stop_video;
2011 }
2012
2013 video->input = input = input_allocate_device();
2014 if (!input) {
2015 error = -ENOMEM;
2016 goto err_uninstall_notify;
2017 }
2018
2019 snprintf(video->phys, sizeof(video->phys),
2020 "%s/video/input0", acpi_device_hid(video->device));
2021
2022 input->name = acpi_device_name(video->device);
2023 input->phys = video->phys;
2024 input->id.bustype = BUS_HOST;
2025 input->id.product = 0x06;
2026 input->dev.parent = &device->dev;
2027 input->evbit[0] = BIT(EV_KEY);
2028 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2029 set_bit(KEY_VIDEO_NEXT, input->keybit);
2030 set_bit(KEY_VIDEO_PREV, input->keybit);
2031 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2032 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2033 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2034 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2035 set_bit(KEY_DISPLAY_OFF, input->keybit);
2036 set_bit(KEY_UNKNOWN, input->keybit);
2037
2038 error = input_register_device(input);
2039 if (error)
2040 goto err_free_input_dev;
2041
2042 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2043 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2044 video->flags.multihead ? "yes" : "no",
2045 video->flags.rom ? "yes" : "no",
2046 video->flags.post ? "yes" : "no");
2047
2048 return 0;
2049
2050 err_free_input_dev:
2051 input_free_device(input);
2052 err_uninstall_notify:
2053 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2054 acpi_video_bus_notify);
2055 err_stop_video:
2056 acpi_video_bus_stop_devices(video);
2057 acpi_video_bus_put_devices(video);
2058 kfree(video->attached_array);
2059 acpi_video_bus_remove_fs(device);
2060 err_free_video:
2061 kfree(video);
2062 acpi_driver_data(device) = NULL;
2063
2064 return error;
2065 }
2066
2067 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2068 {
2069 acpi_status status = 0;
2070 struct acpi_video_bus *video = NULL;
2071
2072
2073 if (!device || !acpi_driver_data(device))
2074 return -EINVAL;
2075
2076 video = acpi_driver_data(device);
2077
2078 acpi_video_bus_stop_devices(video);
2079
2080 status = acpi_remove_notify_handler(video->device->handle,
2081 ACPI_DEVICE_NOTIFY,
2082 acpi_video_bus_notify);
2083
2084 acpi_video_bus_put_devices(video);
2085 acpi_video_bus_remove_fs(device);
2086
2087 input_unregister_device(video->input);
2088 kfree(video->attached_array);
2089 kfree(video);
2090
2091 return 0;
2092 }
2093
2094 static int __init acpi_video_init(void)
2095 {
2096 int result = 0;
2097
2098
2099 /*
2100 acpi_dbg_level = 0xFFFFFFFF;
2101 acpi_dbg_layer = 0x08000000;
2102 */
2103
2104 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2105 if (!acpi_video_dir)
2106 return -ENODEV;
2107 acpi_video_dir->owner = THIS_MODULE;
2108
2109 result = acpi_bus_register_driver(&acpi_video_bus);
2110 if (result < 0) {
2111 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2112 return -ENODEV;
2113 }
2114
2115 return 0;
2116 }
2117
2118 static void __exit acpi_video_exit(void)
2119 {
2120
2121 acpi_bus_unregister_driver(&acpi_video_bus);
2122
2123 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2124
2125 return;
2126 }
2127
2128 module_init(acpi_video_init);
2129 module_exit(acpi_video_exit);
Support for the Chinese Samsung S3C2440 based development boards