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ACPI: register ACPI Video LCD as generic thermal cooling device
[linux-2.6/mini2440.git] / drivers / acpi / video.c
blobeab9c4213b49625a800c42b581b0e6931cb9c39a
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <asm/uaccess.h>
40
41 #include <acpi/acpi_bus.h>
42 #include <acpi/acpi_drivers.h>
43
44 #define ACPI_VIDEO_COMPONENT 0x08000000
45 #define ACPI_VIDEO_CLASS "video"
46 #define ACPI_VIDEO_BUS_NAME "Video Bus"
47 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
48 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
49 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
50 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
51 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
52 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
53
54 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
55 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
56 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
57 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
58 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
59
60 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
61 #define ACPI_VIDEO_HEAD_END (~0u)
62 #define MAX_NAME_LEN 20
63
64 #define ACPI_VIDEO_DISPLAY_CRT 1
65 #define ACPI_VIDEO_DISPLAY_TV 2
66 #define ACPI_VIDEO_DISPLAY_DVI 3
67 #define ACPI_VIDEO_DISPLAY_LCD 4
68
69 #define _COMPONENT ACPI_VIDEO_COMPONENT
70 ACPI_MODULE_NAME("video");
71
72 MODULE_AUTHOR("Bruno Ducrot");
73 MODULE_DESCRIPTION("ACPI Video Driver");
74 MODULE_LICENSE("GPL");
75
76 static int acpi_video_bus_add(struct acpi_device *device);
77 static int acpi_video_bus_remove(struct acpi_device *device, int type);
78
79 static const struct acpi_device_id video_device_ids[] = {
80 {ACPI_VIDEO_HID, 0},
81 {"", 0},
82 };
83 MODULE_DEVICE_TABLE(acpi, video_device_ids);
84
85 static struct acpi_driver acpi_video_bus = {
86 .name = "video",
87 .class = ACPI_VIDEO_CLASS,
88 .ids = video_device_ids,
89 .ops = {
90 .add = acpi_video_bus_add,
91 .remove = acpi_video_bus_remove,
92 },
93 };
94
95 struct acpi_video_bus_flags {
96 u8 multihead:1; /* can switch video heads */
97 u8 rom:1; /* can retrieve a video rom */
98 u8 post:1; /* can configure the head to */
99 u8 reserved:5;
100 };
101
102 struct acpi_video_bus_cap {
103 u8 _DOS:1; /*Enable/Disable output switching */
104 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
105 u8 _ROM:1; /*Get ROM Data */
106 u8 _GPD:1; /*Get POST Device */
107 u8 _SPD:1; /*Set POST Device */
108 u8 _VPO:1; /*Video POST Options */
109 u8 reserved:2;
110 };
111
112 struct acpi_video_device_attrib {
113 u32 display_index:4; /* A zero-based instance of the Display */
114 u32 display_port_attachment:4; /*This field differentiates the display type */
115 u32 display_type:4; /*Describe the specific type in use */
116 u32 vendor_specific:4; /*Chipset Vendor Specific */
117 u32 bios_can_detect:1; /*BIOS can detect the device */
118 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
119 the VGA device. */
120 u32 pipe_id:3; /*For VGA multiple-head devices. */
121 u32 reserved:10; /*Must be 0 */
122 u32 device_id_scheme:1; /*Device ID Scheme */
123 };
124
125 struct acpi_video_enumerated_device {
126 union {
127 u32 int_val;
128 struct acpi_video_device_attrib attrib;
129 } value;
130 struct acpi_video_device *bind_info;
131 };
132
133 struct acpi_video_bus {
134 struct acpi_device *device;
135 u8 dos_setting;
136 struct acpi_video_enumerated_device *attached_array;
137 u8 attached_count;
138 struct acpi_video_bus_cap cap;
139 struct acpi_video_bus_flags flags;
140 struct list_head video_device_list;
141 struct mutex device_list_lock; /* protects video_device_list */
142 struct proc_dir_entry *dir;
143 struct input_dev *input;
144 char phys[32]; /* for input device */
145 };
146
147 struct acpi_video_device_flags {
148 u8 crt:1;
149 u8 lcd:1;
150 u8 tvout:1;
151 u8 dvi:1;
152 u8 bios:1;
153 u8 unknown:1;
154 u8 reserved:2;
155 };
156
157 struct acpi_video_device_cap {
158 u8 _ADR:1; /*Return the unique ID */
159 u8 _BCL:1; /*Query list of brightness control levels supported */
160 u8 _BCM:1; /*Set the brightness level */
161 u8 _BQC:1; /* Get current brightness level */
162 u8 _DDC:1; /*Return the EDID for this device */
163 u8 _DCS:1; /*Return status of output device */
164 u8 _DGS:1; /*Query graphics state */
165 u8 _DSS:1; /*Device state set */
166 };
167
168 struct acpi_video_device_brightness {
169 int curr;
170 int count;
171 int *levels;
172 };
173
174 struct acpi_video_device {
175 unsigned long device_id;
176 struct acpi_video_device_flags flags;
177 struct acpi_video_device_cap cap;
178 struct list_head entry;
179 struct acpi_video_bus *video;
180 struct acpi_device *dev;
181 struct acpi_video_device_brightness *brightness;
182 struct backlight_device *backlight;
183 struct thermal_cooling_device *cdev;
184 struct output_device *output_dev;
185 };
186
187 /* bus */
188 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
189 static struct file_operations acpi_video_bus_info_fops = {
190 .open = acpi_video_bus_info_open_fs,
191 .read = seq_read,
192 .llseek = seq_lseek,
193 .release = single_release,
194 };
195
196 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
197 static struct file_operations acpi_video_bus_ROM_fops = {
198 .open = acpi_video_bus_ROM_open_fs,
199 .read = seq_read,
200 .llseek = seq_lseek,
201 .release = single_release,
202 };
203
204 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
205 struct file *file);
206 static struct file_operations acpi_video_bus_POST_info_fops = {
207 .open = acpi_video_bus_POST_info_open_fs,
208 .read = seq_read,
209 .llseek = seq_lseek,
210 .release = single_release,
211 };
212
213 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
214 static struct file_operations acpi_video_bus_POST_fops = {
215 .open = acpi_video_bus_POST_open_fs,
216 .read = seq_read,
217 .llseek = seq_lseek,
218 .release = single_release,
219 };
220
221 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
222 static struct file_operations acpi_video_bus_DOS_fops = {
223 .open = acpi_video_bus_DOS_open_fs,
224 .read = seq_read,
225 .llseek = seq_lseek,
226 .release = single_release,
227 };
228
229 /* device */
230 static int acpi_video_device_info_open_fs(struct inode *inode,
231 struct file *file);
232 static struct file_operations acpi_video_device_info_fops = {
233 .open = acpi_video_device_info_open_fs,
234 .read = seq_read,
235 .llseek = seq_lseek,
236 .release = single_release,
237 };
238
239 static int acpi_video_device_state_open_fs(struct inode *inode,
240 struct file *file);
241 static struct file_operations acpi_video_device_state_fops = {
242 .open = acpi_video_device_state_open_fs,
243 .read = seq_read,
244 .llseek = seq_lseek,
245 .release = single_release,
246 };
247
248 static int acpi_video_device_brightness_open_fs(struct inode *inode,
249 struct file *file);
250 static struct file_operations acpi_video_device_brightness_fops = {
251 .open = acpi_video_device_brightness_open_fs,
252 .read = seq_read,
253 .llseek = seq_lseek,
254 .release = single_release,
255 };
256
257 static int acpi_video_device_EDID_open_fs(struct inode *inode,
258 struct file *file);
259 static struct file_operations acpi_video_device_EDID_fops = {
260 .open = acpi_video_device_EDID_open_fs,
261 .read = seq_read,
262 .llseek = seq_lseek,
263 .release = single_release,
264 };
265
266 static char device_decode[][30] = {
267 "motherboard VGA device",
268 "PCI VGA device",
269 "AGP VGA device",
270 "UNKNOWN",
271 };
272
273 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
274 static void acpi_video_device_rebind(struct acpi_video_bus *video);
275 static void acpi_video_device_bind(struct acpi_video_bus *video,
276 struct acpi_video_device *device);
277 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
278 static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
279 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
280 int level);
281 static int acpi_video_device_lcd_get_level_current(
282 struct acpi_video_device *device,
283 unsigned long *level);
284 static int acpi_video_get_next_level(struct acpi_video_device *device,
285 u32 level_current, u32 event);
286 static void acpi_video_switch_brightness(struct acpi_video_device *device,
287 int event);
288 static int acpi_video_device_get_state(struct acpi_video_device *device,
289 unsigned long *state);
290 static int acpi_video_output_get(struct output_device *od);
291 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
292
293 /*backlight device sysfs support*/
294 static int acpi_video_get_brightness(struct backlight_device *bd)
295 {
296 unsigned long cur_level;
297 struct acpi_video_device *vd =
298 (struct acpi_video_device *)bl_get_data(bd);
299 acpi_video_device_lcd_get_level_current(vd, &cur_level);
300 return (int) cur_level;
301 }
302
303 static int acpi_video_set_brightness(struct backlight_device *bd)
304 {
305 int request_level = bd->props.brightness;
306 struct acpi_video_device *vd =
307 (struct acpi_video_device *)bl_get_data(bd);
308 acpi_video_device_lcd_set_level(vd, request_level);
309 return 0;
310 }
311
312 static struct backlight_ops acpi_backlight_ops = {
313 .get_brightness = acpi_video_get_brightness,
314 .update_status = acpi_video_set_brightness,
315 };
316
317 /*video output device sysfs support*/
318 static int acpi_video_output_get(struct output_device *od)
319 {
320 unsigned long state;
321 struct acpi_video_device *vd =
322 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
323 acpi_video_device_get_state(vd, &state);
324 return (int)state;
325 }
326
327 static int acpi_video_output_set(struct output_device *od)
328 {
329 unsigned long state = od->request_state;
330 struct acpi_video_device *vd=
331 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
332 return acpi_video_device_set_state(vd, state);
333 }
334
335 static struct output_properties acpi_output_properties = {
336 .set_state = acpi_video_output_set,
337 .get_status = acpi_video_output_get,
338 };
339
340
341 /* thermal cooling device callbacks */
342 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
343 {
344 struct acpi_device *device = cdev->devdata;
345 struct acpi_video_device *video = acpi_driver_data(device);
346
347 return sprintf(buf, "%d\n", video->brightness->count - 3);
348 }
349
350 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
351 {
352 struct acpi_device *device = cdev->devdata;
353 struct acpi_video_device *video = acpi_driver_data(device);
354 unsigned long level;
355 int state;
356
357 acpi_video_device_lcd_get_level_current(video, &level);
358 for (state = 2; state < video->brightness->count; state++)
359 if (level == video->brightness->levels[state])
360 return sprintf(buf, "%d\n",
361 video->brightness->count - state - 1);
362
363 return -EINVAL;
364 }
365
366 static int
367 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
368 {
369 struct acpi_device *device = cdev->devdata;
370 struct acpi_video_device *video = acpi_driver_data(device);
371 int level;
372
373 if ( state >= video->brightness->count - 2)
374 return -EINVAL;
375
376 state = video->brightness->count - state;
377 level = video->brightness->levels[state -1];
378 return acpi_video_device_lcd_set_level(video, level);
379 }
380
381 static struct thermal_cooling_device_ops video_cooling_ops = {
382 .get_max_state = video_get_max_state,
383 .get_cur_state = video_get_cur_state,
384 .set_cur_state = video_set_cur_state,
385 };
386
387 /* --------------------------------------------------------------------------
388 Video Management
389 -------------------------------------------------------------------------- */
390
391 /* device */
392
393 static int
394 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
395 {
396 int status;
397
398 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
399
400 return status;
401 }
402
403 static int
404 acpi_video_device_get_state(struct acpi_video_device *device,
405 unsigned long *state)
406 {
407 int status;
408
409 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
410
411 return status;
412 }
413
414 static int
415 acpi_video_device_set_state(struct acpi_video_device *device, int state)
416 {
417 int status;
418 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
419 struct acpi_object_list args = { 1, &arg0 };
420 unsigned long ret;
421
422
423 arg0.integer.value = state;
424 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
425
426 return status;
427 }
428
429 static int
430 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
431 union acpi_object **levels)
432 {
433 int status;
434 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
435 union acpi_object *obj;
436
437
438 *levels = NULL;
439
440 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
441 if (!ACPI_SUCCESS(status))
442 return status;
443 obj = (union acpi_object *)buffer.pointer;
444 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
445 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
446 status = -EFAULT;
447 goto err;
448 }
449
450 *levels = obj;
451
452 return 0;
453
454 err:
455 kfree(buffer.pointer);
456
457 return status;
458 }
459
460 static int
461 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
462 {
463 int status = AE_OK;
464 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
465 struct acpi_object_list args = { 1, &arg0 };
466
467
468 arg0.integer.value = level;
469
470 if (device->cap._BCM)
471 status = acpi_evaluate_object(device->dev->handle, "_BCM",
472 &args, NULL);
473 device->brightness->curr = level;
474 return status;
475 }
476
477 static int
478 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
479 unsigned long *level)
480 {
481 if (device->cap._BQC)
482 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
483 level);
484 *level = device->brightness->curr;
485 return AE_OK;
486 }
487
488 static int
489 acpi_video_device_EDID(struct acpi_video_device *device,
490 union acpi_object **edid, ssize_t length)
491 {
492 int status;
493 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
494 union acpi_object *obj;
495 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
496 struct acpi_object_list args = { 1, &arg0 };
497
498
499 *edid = NULL;
500
501 if (!device)
502 return -ENODEV;
503 if (length == 128)
504 arg0.integer.value = 1;
505 else if (length == 256)
506 arg0.integer.value = 2;
507 else
508 return -EINVAL;
509
510 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
511 if (ACPI_FAILURE(status))
512 return -ENODEV;
513
514 obj = buffer.pointer;
515
516 if (obj && obj->type == ACPI_TYPE_BUFFER)
517 *edid = obj;
518 else {
519 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
520 status = -EFAULT;
521 kfree(obj);
522 }
523
524 return status;
525 }
526
527 /* bus */
528
529 static int
530 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
531 {
532 int status;
533 unsigned long tmp;
534 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
535 struct acpi_object_list args = { 1, &arg0 };
536
537
538 arg0.integer.value = option;
539
540 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
541 if (ACPI_SUCCESS(status))
542 status = tmp ? (-EINVAL) : (AE_OK);
543
544 return status;
545 }
546
547 static int
548 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
549 {
550 int status;
551
552 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
553
554 return status;
555 }
556
557 static int
558 acpi_video_bus_POST_options(struct acpi_video_bus *video,
559 unsigned long *options)
560 {
561 int status;
562
563 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
564 *options &= 3;
565
566 return status;
567 }
568
569 /*
570 * Arg:
571 * video : video bus device pointer
572 * bios_flag :
573 * 0. The system BIOS should NOT automatically switch(toggle)
574 * the active display output.
575 * 1. The system BIOS should automatically switch (toggle) the
576 * active display output. No switch event.
577 * 2. The _DGS value should be locked.
578 * 3. The system BIOS should not automatically switch (toggle) the
579 * active display output, but instead generate the display switch
580 * event notify code.
581 * lcd_flag :
582 * 0. The system BIOS should automatically control the brightness level
583 * of the LCD when the power changes from AC to DC
584 * 1. The system BIOS should NOT automatically control the brightness
585 * level of the LCD when the power changes from AC to DC.
586 * Return Value:
587 * -1 wrong arg.
588 */
589
590 static int
591 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
592 {
593 acpi_integer status = 0;
594 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
595 struct acpi_object_list args = { 1, &arg0 };
596
597
598 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
599 status = -1;
600 goto Failed;
601 }
602 arg0.integer.value = (lcd_flag << 2) | bios_flag;
603 video->dos_setting = arg0.integer.value;
604 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
605
606 Failed:
607 return status;
608 }
609
610 /*
611 * Arg:
612 * device : video output device (LCD, CRT, ..)
613 *
614 * Return Value:
615 * None
616 *
617 * Find out all required AML methods defined under the output
618 * device.
619 */
620
621 static void acpi_video_device_find_cap(struct acpi_video_device *device)
622 {
623 acpi_handle h_dummy1;
624 int i;
625 u32 max_level = 0;
626 union acpi_object *obj = NULL;
627 struct acpi_video_device_brightness *br = NULL;
628
629
630 memset(&device->cap, 0, sizeof(device->cap));
631
632 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
633 device->cap._ADR = 1;
634 }
635 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
636 device->cap._BCL = 1;
637 }
638 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
639 device->cap._BCM = 1;
640 }
641 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
642 device->cap._BQC = 1;
643 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
644 device->cap._DDC = 1;
645 }
646 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
647 device->cap._DCS = 1;
648 }
649 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
650 device->cap._DGS = 1;
651 }
652 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
653 device->cap._DSS = 1;
654 }
655
656 if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
657
658 if (obj->package.count >= 2) {
659 int count = 0;
660 union acpi_object *o;
661
662 br = kzalloc(sizeof(*br), GFP_KERNEL);
663 if (!br) {
664 printk(KERN_ERR "can't allocate memory\n");
665 } else {
666 br->levels = kmalloc(obj->package.count *
667 sizeof *(br->levels), GFP_KERNEL);
668 if (!br->levels)
669 goto out;
670
671 for (i = 0; i < obj->package.count; i++) {
672 o = (union acpi_object *)&obj->package.
673 elements[i];
674 if (o->type != ACPI_TYPE_INTEGER) {
675 printk(KERN_ERR PREFIX "Invalid data\n");
676 continue;
677 }
678 br->levels[count] = (u32) o->integer.value;
679
680 if (br->levels[count] > max_level)
681 max_level = br->levels[count];
682 count++;
683 }
684 out:
685 if (count < 2) {
686 kfree(br->levels);
687 kfree(br);
688 } else {
689 br->count = count;
690 device->brightness = br;
691 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
692 "found %d brightness levels\n",
693 count));
694 }
695 }
696 }
697
698 } else {
699 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
700 }
701
702 kfree(obj);
703
704 if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
705 unsigned long tmp;
706 int result;
707 static int count = 0;
708 char *name;
709 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
710 if (!name)
711 return;
712
713 sprintf(name, "acpi_video%d", count++);
714 acpi_video_device_lcd_get_level_current(device, &tmp);
715 device->backlight = backlight_device_register(name,
716 NULL, device, &acpi_backlight_ops);
717 device->backlight->props.max_brightness = max_level;
718 device->backlight->props.brightness = (int)tmp;
719 backlight_update_status(device->backlight);
720 kfree(name);
721
722 device->cdev = thermal_cooling_device_register("LCD",
723 device->dev, &video_cooling_ops);
724 if (device->cdev) {
725 printk(KERN_INFO PREFIX
726 "%s is registered as cooling_device%d\n",
727 device->dev->dev.bus_id, device->cdev->id);
728 result = sysfs_create_link(&device->dev->dev.kobj,
729 &device->cdev->device.kobj,
730 "thermal_cooling");
731 if (result)
732 printk(KERN_ERR PREFIX "Create sysfs link\n");
733 result = sysfs_create_link(&device->cdev->device.kobj,
734 &device->dev->dev.kobj,
735 "device");
736 if (result)
737 printk(KERN_ERR PREFIX "Create sysfs link\n");
738 }
739 }
740 if (device->cap._DCS && device->cap._DSS){
741 static int count = 0;
742 char *name;
743 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
744 if (!name)
745 return;
746 sprintf(name, "acpi_video%d", count++);
747 device->output_dev = video_output_register(name,
748 NULL, device, &acpi_output_properties);
749 kfree(name);
750 }
751 return;
752 }
753
754 /*
755 * Arg:
756 * device : video output device (VGA)
757 *
758 * Return Value:
759 * None
760 *
761 * Find out all required AML methods defined under the video bus device.
762 */
763
764 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
765 {
766 acpi_handle h_dummy1;
767
768 memset(&video->cap, 0, sizeof(video->cap));
769 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
770 video->cap._DOS = 1;
771 }
772 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
773 video->cap._DOD = 1;
774 }
775 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
776 video->cap._ROM = 1;
777 }
778 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
779 video->cap._GPD = 1;
780 }
781 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
782 video->cap._SPD = 1;
783 }
784 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
785 video->cap._VPO = 1;
786 }
787 }
788
789 /*
790 * Check whether the video bus device has required AML method to
791 * support the desired features
792 */
793
794 static int acpi_video_bus_check(struct acpi_video_bus *video)
795 {
796 acpi_status status = -ENOENT;
797
798
799 if (!video)
800 return -EINVAL;
801
802 /* Since there is no HID, CID and so on for VGA driver, we have
803 * to check well known required nodes.
804 */
805
806 /* Does this device support video switching? */
807 if (video->cap._DOS) {
808 video->flags.multihead = 1;
809 status = 0;
810 }
811
812 /* Does this device support retrieving a video ROM? */
813 if (video->cap._ROM) {
814 video->flags.rom = 1;
815 status = 0;
816 }
817
818 /* Does this device support configuring which video device to POST? */
819 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
820 video->flags.post = 1;
821 status = 0;
822 }
823
824 return status;
825 }
826
827 /* --------------------------------------------------------------------------
828 FS Interface (/proc)
829 -------------------------------------------------------------------------- */
830
831 static struct proc_dir_entry *acpi_video_dir;
832
833 /* video devices */
834
835 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
836 {
837 struct acpi_video_device *dev = seq->private;
838
839
840 if (!dev)
841 goto end;
842
843 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
844 seq_printf(seq, "type: ");
845 if (dev->flags.crt)
846 seq_printf(seq, "CRT\n");
847 else if (dev->flags.lcd)
848 seq_printf(seq, "LCD\n");
849 else if (dev->flags.tvout)
850 seq_printf(seq, "TVOUT\n");
851 else if (dev->flags.dvi)
852 seq_printf(seq, "DVI\n");
853 else
854 seq_printf(seq, "UNKNOWN\n");
855
856 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
857
858 end:
859 return 0;
860 }
861
862 static int
863 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
864 {
865 return single_open(file, acpi_video_device_info_seq_show,
866 PDE(inode)->data);
867 }
868
869 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
870 {
871 int status;
872 struct acpi_video_device *dev = seq->private;
873 unsigned long state;
874
875
876 if (!dev)
877 goto end;
878
879 status = acpi_video_device_get_state(dev, &state);
880 seq_printf(seq, "state: ");
881 if (ACPI_SUCCESS(status))
882 seq_printf(seq, "0x%02lx\n", state);
883 else
884 seq_printf(seq, "<not supported>\n");
885
886 status = acpi_video_device_query(dev, &state);
887 seq_printf(seq, "query: ");
888 if (ACPI_SUCCESS(status))
889 seq_printf(seq, "0x%02lx\n", state);
890 else
891 seq_printf(seq, "<not supported>\n");
892
893 end:
894 return 0;
895 }
896
897 static int
898 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
899 {
900 return single_open(file, acpi_video_device_state_seq_show,
901 PDE(inode)->data);
902 }
903
904 static ssize_t
905 acpi_video_device_write_state(struct file *file,
906 const char __user * buffer,
907 size_t count, loff_t * data)
908 {
909 int status;
910 struct seq_file *m = file->private_data;
911 struct acpi_video_device *dev = m->private;
912 char str[12] = { 0 };
913 u32 state = 0;
914
915
916 if (!dev || count + 1 > sizeof str)
917 return -EINVAL;
918
919 if (copy_from_user(str, buffer, count))
920 return -EFAULT;
921
922 str[count] = 0;
923 state = simple_strtoul(str, NULL, 0);
924 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
925
926 status = acpi_video_device_set_state(dev, state);
927
928 if (status)
929 return -EFAULT;
930
931 return count;
932 }
933
934 static int
935 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
936 {
937 struct acpi_video_device *dev = seq->private;
938 int i;
939
940
941 if (!dev || !dev->brightness) {
942 seq_printf(seq, "<not supported>\n");
943 return 0;
944 }
945
946 seq_printf(seq, "levels: ");
947 for (i = 0; i < dev->brightness->count; i++)
948 seq_printf(seq, " %d", dev->brightness->levels[i]);
949 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
950
951 return 0;
952 }
953
954 static int
955 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
956 {
957 return single_open(file, acpi_video_device_brightness_seq_show,
958 PDE(inode)->data);
959 }
960
961 static ssize_t
962 acpi_video_device_write_brightness(struct file *file,
963 const char __user * buffer,
964 size_t count, loff_t * data)
965 {
966 struct seq_file *m = file->private_data;
967 struct acpi_video_device *dev = m->private;
968 char str[5] = { 0 };
969 unsigned int level = 0;
970 int i;
971
972
973 if (!dev || !dev->brightness || count + 1 > sizeof str)
974 return -EINVAL;
975
976 if (copy_from_user(str, buffer, count))
977 return -EFAULT;
978
979 str[count] = 0;
980 level = simple_strtoul(str, NULL, 0);
981
982 if (level > 100)
983 return -EFAULT;
984
985 /* validate through the list of available levels */
986 for (i = 0; i < dev->brightness->count; i++)
987 if (level == dev->brightness->levels[i]) {
988 if (ACPI_SUCCESS
989 (acpi_video_device_lcd_set_level(dev, level)))
990 dev->brightness->curr = level;
991 break;
992 }
993
994 return count;
995 }
996
997 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
998 {
999 struct acpi_video_device *dev = seq->private;
1000 int status;
1001 int i;
1002 union acpi_object *edid = NULL;
1003
1004
1005 if (!dev)
1006 goto out;
1007
1008 status = acpi_video_device_EDID(dev, &edid, 128);
1009 if (ACPI_FAILURE(status)) {
1010 status = acpi_video_device_EDID(dev, &edid, 256);
1011 }
1012
1013 if (ACPI_FAILURE(status)) {
1014 goto out;
1015 }
1016
1017 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1018 for (i = 0; i < edid->buffer.length; i++)
1019 seq_putc(seq, edid->buffer.pointer[i]);
1020 }
1021
1022 out:
1023 if (!edid)
1024 seq_printf(seq, "<not supported>\n");
1025 else
1026 kfree(edid);
1027
1028 return 0;
1029 }
1030
1031 static int
1032 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1033 {
1034 return single_open(file, acpi_video_device_EDID_seq_show,
1035 PDE(inode)->data);
1036 }
1037
1038 static int acpi_video_device_add_fs(struct acpi_device *device)
1039 {
1040 struct proc_dir_entry *entry = NULL;
1041 struct acpi_video_device *vid_dev;
1042
1043
1044 if (!device)
1045 return -ENODEV;
1046
1047 vid_dev = acpi_driver_data(device);
1048 if (!vid_dev)
1049 return -ENODEV;
1050
1051 if (!acpi_device_dir(device)) {
1052 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1053 vid_dev->video->dir);
1054 if (!acpi_device_dir(device))
1055 return -ENODEV;
1056 acpi_device_dir(device)->owner = THIS_MODULE;
1057 }
1058
1059 /* 'info' [R] */
1060 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1061 if (!entry)
1062 return -ENODEV;
1063 else {
1064 entry->proc_fops = &acpi_video_device_info_fops;
1065 entry->data = acpi_driver_data(device);
1066 entry->owner = THIS_MODULE;
1067 }
1068
1069 /* 'state' [R/W] */
1070 entry =
1071 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
1072 acpi_device_dir(device));
1073 if (!entry)
1074 return -ENODEV;
1075 else {
1076 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1077 entry->proc_fops = &acpi_video_device_state_fops;
1078 entry->data = acpi_driver_data(device);
1079 entry->owner = THIS_MODULE;
1080 }
1081
1082 /* 'brightness' [R/W] */
1083 entry =
1084 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1085 acpi_device_dir(device));
1086 if (!entry)
1087 return -ENODEV;
1088 else {
1089 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
1090 entry->proc_fops = &acpi_video_device_brightness_fops;
1091 entry->data = acpi_driver_data(device);
1092 entry->owner = THIS_MODULE;
1093 }
1094
1095 /* 'EDID' [R] */
1096 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
1097 if (!entry)
1098 return -ENODEV;
1099 else {
1100 entry->proc_fops = &acpi_video_device_EDID_fops;
1101 entry->data = acpi_driver_data(device);
1102 entry->owner = THIS_MODULE;
1103 }
1104
1105 return 0;
1106 }
1107
1108 static int acpi_video_device_remove_fs(struct acpi_device *device)
1109 {
1110 struct acpi_video_device *vid_dev;
1111
1112 vid_dev = acpi_driver_data(device);
1113 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1114 return -ENODEV;
1115
1116 if (acpi_device_dir(device)) {
1117 remove_proc_entry("info", acpi_device_dir(device));
1118 remove_proc_entry("state", acpi_device_dir(device));
1119 remove_proc_entry("brightness", acpi_device_dir(device));
1120 remove_proc_entry("EDID", acpi_device_dir(device));
1121 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1122 acpi_device_dir(device) = NULL;
1123 }
1124
1125 return 0;
1126 }
1127
1128 /* video bus */
1129 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1130 {
1131 struct acpi_video_bus *video = seq->private;
1132
1133
1134 if (!video)
1135 goto end;
1136
1137 seq_printf(seq, "Switching heads: %s\n",
1138 video->flags.multihead ? "yes" : "no");
1139 seq_printf(seq, "Video ROM: %s\n",
1140 video->flags.rom ? "yes" : "no");
1141 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1142 video->flags.post ? "yes" : "no");
1143
1144 end:
1145 return 0;
1146 }
1147
1148 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1149 {
1150 return single_open(file, acpi_video_bus_info_seq_show,
1151 PDE(inode)->data);
1152 }
1153
1154 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1155 {
1156 struct acpi_video_bus *video = seq->private;
1157
1158
1159 if (!video)
1160 goto end;
1161
1162 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1163 seq_printf(seq, "<TODO>\n");
1164
1165 end:
1166 return 0;
1167 }
1168
1169 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1170 {
1171 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1172 }
1173
1174 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1175 {
1176 struct acpi_video_bus *video = seq->private;
1177 unsigned long options;
1178 int status;
1179
1180
1181 if (!video)
1182 goto end;
1183
1184 status = acpi_video_bus_POST_options(video, &options);
1185 if (ACPI_SUCCESS(status)) {
1186 if (!(options & 1)) {
1187 printk(KERN_WARNING PREFIX
1188 "The motherboard VGA device is not listed as a possible POST device.\n");
1189 printk(KERN_WARNING PREFIX
1190 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1191 }
1192 printk("%lx\n", options);
1193 seq_printf(seq, "can POST: <integrated video>");
1194 if (options & 2)
1195 seq_printf(seq, " <PCI video>");
1196 if (options & 4)
1197 seq_printf(seq, " <AGP video>");
1198 seq_putc(seq, '\n');
1199 } else
1200 seq_printf(seq, "<not supported>\n");
1201 end:
1202 return 0;
1203 }
1204
1205 static int
1206 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1207 {
1208 return single_open(file, acpi_video_bus_POST_info_seq_show,
1209 PDE(inode)->data);
1210 }
1211
1212 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1213 {
1214 struct acpi_video_bus *video = seq->private;
1215 int status;
1216 unsigned long id;
1217
1218
1219 if (!video)
1220 goto end;
1221
1222 status = acpi_video_bus_get_POST(video, &id);
1223 if (!ACPI_SUCCESS(status)) {
1224 seq_printf(seq, "<not supported>\n");
1225 goto end;
1226 }
1227 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1228
1229 end:
1230 return 0;
1231 }
1232
1233 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1234 {
1235 struct acpi_video_bus *video = seq->private;
1236
1237
1238 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1239
1240 return 0;
1241 }
1242
1243 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1244 {
1245 return single_open(file, acpi_video_bus_POST_seq_show,
1246 PDE(inode)->data);
1247 }
1248
1249 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1250 {
1251 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1252 }
1253
1254 static ssize_t
1255 acpi_video_bus_write_POST(struct file *file,
1256 const char __user * buffer,
1257 size_t count, loff_t * data)
1258 {
1259 int status;
1260 struct seq_file *m = file->private_data;
1261 struct acpi_video_bus *video = m->private;
1262 char str[12] = { 0 };
1263 unsigned long opt, options;
1264
1265
1266 if (!video || count + 1 > sizeof str)
1267 return -EINVAL;
1268
1269 status = acpi_video_bus_POST_options(video, &options);
1270 if (!ACPI_SUCCESS(status))
1271 return -EINVAL;
1272
1273 if (copy_from_user(str, buffer, count))
1274 return -EFAULT;
1275
1276 str[count] = 0;
1277 opt = strtoul(str, NULL, 0);
1278 if (opt > 3)
1279 return -EFAULT;
1280
1281 /* just in case an OEM 'forgot' the motherboard... */
1282 options |= 1;
1283
1284 if (options & (1ul << opt)) {
1285 status = acpi_video_bus_set_POST(video, opt);
1286 if (!ACPI_SUCCESS(status))
1287 return -EFAULT;
1288
1289 }
1290
1291 return count;
1292 }
1293
1294 static ssize_t
1295 acpi_video_bus_write_DOS(struct file *file,
1296 const char __user * buffer,
1297 size_t count, loff_t * data)
1298 {
1299 int status;
1300 struct seq_file *m = file->private_data;
1301 struct acpi_video_bus *video = m->private;
1302 char str[12] = { 0 };
1303 unsigned long opt;
1304
1305
1306 if (!video || count + 1 > sizeof str)
1307 return -EINVAL;
1308
1309 if (copy_from_user(str, buffer, count))
1310 return -EFAULT;
1311
1312 str[count] = 0;
1313 opt = strtoul(str, NULL, 0);
1314 if (opt > 7)
1315 return -EFAULT;
1316
1317 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1318
1319 if (!ACPI_SUCCESS(status))
1320 return -EFAULT;
1321
1322 return count;
1323 }
1324
1325 static int acpi_video_bus_add_fs(struct acpi_device *device)
1326 {
1327 struct proc_dir_entry *entry = NULL;
1328 struct acpi_video_bus *video;
1329
1330
1331 video = acpi_driver_data(device);
1332
1333 if (!acpi_device_dir(device)) {
1334 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1335 acpi_video_dir);
1336 if (!acpi_device_dir(device))
1337 return -ENODEV;
1338 video->dir = acpi_device_dir(device);
1339 acpi_device_dir(device)->owner = THIS_MODULE;
1340 }
1341
1342 /* 'info' [R] */
1343 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1344 if (!entry)
1345 return -ENODEV;
1346 else {
1347 entry->proc_fops = &acpi_video_bus_info_fops;
1348 entry->data = acpi_driver_data(device);
1349 entry->owner = THIS_MODULE;
1350 }
1351
1352 /* 'ROM' [R] */
1353 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1354 if (!entry)
1355 return -ENODEV;
1356 else {
1357 entry->proc_fops = &acpi_video_bus_ROM_fops;
1358 entry->data = acpi_driver_data(device);
1359 entry->owner = THIS_MODULE;
1360 }
1361
1362 /* 'POST_info' [R] */
1363 entry =
1364 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1365 if (!entry)
1366 return -ENODEV;
1367 else {
1368 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1369 entry->data = acpi_driver_data(device);
1370 entry->owner = THIS_MODULE;
1371 }
1372
1373 /* 'POST' [R/W] */
1374 entry =
1375 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1376 acpi_device_dir(device));
1377 if (!entry)
1378 return -ENODEV;
1379 else {
1380 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1381 entry->proc_fops = &acpi_video_bus_POST_fops;
1382 entry->data = acpi_driver_data(device);
1383 entry->owner = THIS_MODULE;
1384 }
1385
1386 /* 'DOS' [R/W] */
1387 entry =
1388 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1389 acpi_device_dir(device));
1390 if (!entry)
1391 return -ENODEV;
1392 else {
1393 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1394 entry->proc_fops = &acpi_video_bus_DOS_fops;
1395 entry->data = acpi_driver_data(device);
1396 entry->owner = THIS_MODULE;
1397 }
1398
1399 return 0;
1400 }
1401
1402 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1403 {
1404 struct acpi_video_bus *video;
1405
1406
1407 video = acpi_driver_data(device);
1408
1409 if (acpi_device_dir(device)) {
1410 remove_proc_entry("info", acpi_device_dir(device));
1411 remove_proc_entry("ROM", acpi_device_dir(device));
1412 remove_proc_entry("POST_info", acpi_device_dir(device));
1413 remove_proc_entry("POST", acpi_device_dir(device));
1414 remove_proc_entry("DOS", acpi_device_dir(device));
1415 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1416 acpi_device_dir(device) = NULL;
1417 }
1418
1419 return 0;
1420 }
1421
1422 /* --------------------------------------------------------------------------
1423 Driver Interface
1424 -------------------------------------------------------------------------- */
1425
1426 /* device interface */
1427 static struct acpi_video_device_attrib*
1428 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1429 {
1430 int count;
1431
1432 for(count = 0; count < video->attached_count; count++)
1433 if((video->attached_array[count].value.int_val & 0xffff) == device_id)
1434 return &(video->attached_array[count].value.attrib);
1435 return NULL;
1436 }
1437
1438 static int
1439 acpi_video_bus_get_one_device(struct acpi_device *device,
1440 struct acpi_video_bus *video)
1441 {
1442 unsigned long device_id;
1443 int status;
1444 struct acpi_video_device *data;
1445 struct acpi_video_device_attrib* attribute;
1446
1447 if (!device || !video)
1448 return -EINVAL;
1449
1450 status =
1451 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1452 if (ACPI_SUCCESS(status)) {
1453
1454 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1455 if (!data)
1456 return -ENOMEM;
1457
1458 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1459 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1460 acpi_driver_data(device) = data;
1461
1462 data->device_id = device_id;
1463 data->video = video;
1464 data->dev = device;
1465
1466 attribute = acpi_video_get_device_attr(video, device_id);
1467
1468 if((attribute != NULL) && attribute->device_id_scheme) {
1469 switch (attribute->display_type) {
1470 case ACPI_VIDEO_DISPLAY_CRT:
1471 data->flags.crt = 1;
1472 break;
1473 case ACPI_VIDEO_DISPLAY_TV:
1474 data->flags.tvout = 1;
1475 break;
1476 case ACPI_VIDEO_DISPLAY_DVI:
1477 data->flags.dvi = 1;
1478 break;
1479 case ACPI_VIDEO_DISPLAY_LCD:
1480 data->flags.lcd = 1;
1481 break;
1482 default:
1483 data->flags.unknown = 1;
1484 break;
1485 }
1486 if(attribute->bios_can_detect)
1487 data->flags.bios = 1;
1488 } else
1489 data->flags.unknown = 1;
1490
1491 acpi_video_device_bind(video, data);
1492 acpi_video_device_find_cap(data);
1493
1494 status = acpi_install_notify_handler(device->handle,
1495 ACPI_DEVICE_NOTIFY,
1496 acpi_video_device_notify,
1497 data);
1498 if (ACPI_FAILURE(status)) {
1499 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1500 "Error installing notify handler\n"));
1501 if(data->brightness)
1502 kfree(data->brightness->levels);
1503 kfree(data->brightness);
1504 kfree(data);
1505 return -ENODEV;
1506 }
1507
1508 mutex_lock(&video->device_list_lock);
1509 list_add_tail(&data->entry, &video->video_device_list);
1510 mutex_unlock(&video->device_list_lock);
1511
1512 acpi_video_device_add_fs(device);
1513
1514 return 0;
1515 }
1516
1517 return -ENOENT;
1518 }
1519
1520 /*
1521 * Arg:
1522 * video : video bus device
1523 *
1524 * Return:
1525 * none
1526 *
1527 * Enumerate the video device list of the video bus,
1528 * bind the ids with the corresponding video devices
1529 * under the video bus.
1530 */
1531
1532 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1533 {
1534 struct acpi_video_device *dev;
1535
1536 mutex_lock(&video->device_list_lock);
1537
1538 list_for_each_entry(dev, &video->video_device_list, entry)
1539 acpi_video_device_bind(video, dev);
1540
1541 mutex_unlock(&video->device_list_lock);
1542 }
1543
1544 /*
1545 * Arg:
1546 * video : video bus device
1547 * device : video output device under the video
1548 * bus
1549 *
1550 * Return:
1551 * none
1552 *
1553 * Bind the ids with the corresponding video devices
1554 * under the video bus.
1555 */
1556
1557 static void
1558 acpi_video_device_bind(struct acpi_video_bus *video,
1559 struct acpi_video_device *device)
1560 {
1561 int i;
1562
1563 #define IDS_VAL(i) video->attached_array[i].value.int_val
1564 #define IDS_BIND(i) video->attached_array[i].bind_info
1565
1566 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1567 i < video->attached_count; i++) {
1568 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1569 IDS_BIND(i) = device;
1570 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1571 }
1572 }
1573 #undef IDS_VAL
1574 #undef IDS_BIND
1575 }
1576
1577 /*
1578 * Arg:
1579 * video : video bus device
1580 *
1581 * Return:
1582 * < 0 : error
1583 *
1584 * Call _DOD to enumerate all devices attached to display adapter
1585 *
1586 */
1587
1588 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1589 {
1590 int status;
1591 int count;
1592 int i;
1593 struct acpi_video_enumerated_device *active_device_list;
1594 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1595 union acpi_object *dod = NULL;
1596 union acpi_object *obj;
1597
1598 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1599 if (!ACPI_SUCCESS(status)) {
1600 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1601 return status;
1602 }
1603
1604 dod = buffer.pointer;
1605 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1606 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1607 status = -EFAULT;
1608 goto out;
1609 }
1610
1611 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1612 dod->package.count));
1613
1614 active_device_list = kmalloc((1 +
1615 dod->package.count) *
1616 sizeof(struct
1617 acpi_video_enumerated_device),
1618 GFP_KERNEL);
1619
1620 if (!active_device_list) {
1621 status = -ENOMEM;
1622 goto out;
1623 }
1624
1625 count = 0;
1626 for (i = 0; i < dod->package.count; i++) {
1627 obj = &dod->package.elements[i];
1628
1629 if (obj->type != ACPI_TYPE_INTEGER) {
1630 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1631 active_device_list[i].value.int_val =
1632 ACPI_VIDEO_HEAD_INVALID;
1633 }
1634 active_device_list[i].value.int_val = obj->integer.value;
1635 active_device_list[i].bind_info = NULL;
1636 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1637 (int)obj->integer.value));
1638 count++;
1639 }
1640 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1641
1642 kfree(video->attached_array);
1643
1644 video->attached_array = active_device_list;
1645 video->attached_count = count;
1646 out:
1647 kfree(buffer.pointer);
1648 return status;
1649 }
1650
1651 /*
1652 * Arg:
1653 * video : video bus device
1654 * event : notify event
1655 *
1656 * Return:
1657 * < 0 : error
1658 *
1659 * 1. Find out the current active output device.
1660 * 2. Identify the next output device to switch to.
1661 * 3. call _DSS to do actual switch.
1662 */
1663
1664 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1665 {
1666 struct list_head *node;
1667 struct acpi_video_device *dev = NULL;
1668 struct acpi_video_device *dev_next = NULL;
1669 struct acpi_video_device *dev_prev = NULL;
1670 unsigned long state;
1671 int status = 0;
1672
1673 mutex_lock(&video->device_list_lock);
1674
1675 list_for_each(node, &video->video_device_list) {
1676 dev = container_of(node, struct acpi_video_device, entry);
1677 status = acpi_video_device_get_state(dev, &state);
1678 if (state & 0x2) {
1679 dev_next = container_of(node->next,
1680 struct acpi_video_device, entry);
1681 dev_prev = container_of(node->prev,
1682 struct acpi_video_device, entry);
1683 goto out;
1684 }
1685 }
1686
1687 dev_next = container_of(node->next, struct acpi_video_device, entry);
1688 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1689
1690 out:
1691 mutex_unlock(&video->device_list_lock);
1692
1693 switch (event) {
1694 case ACPI_VIDEO_NOTIFY_CYCLE:
1695 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1696 acpi_video_device_set_state(dev, 0);
1697 acpi_video_device_set_state(dev_next, 0x80000001);
1698 break;
1699 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1700 acpi_video_device_set_state(dev, 0);
1701 acpi_video_device_set_state(dev_prev, 0x80000001);
1702 default:
1703 break;
1704 }
1705
1706 return status;
1707 }
1708
1709 static int
1710 acpi_video_get_next_level(struct acpi_video_device *device,
1711 u32 level_current, u32 event)
1712 {
1713 int min, max, min_above, max_below, i, l, delta = 255;
1714 max = max_below = 0;
1715 min = min_above = 255;
1716 /* Find closest level to level_current */
1717 for (i = 0; i < device->brightness->count; i++) {
1718 l = device->brightness->levels[i];
1719 if (abs(l - level_current) < abs(delta)) {
1720 delta = l - level_current;
1721 if (!delta)
1722 break;
1723 }
1724 }
1725 /* Ajust level_current to closest available level */
1726 level_current += delta;
1727 for (i = 0; i < device->brightness->count; i++) {
1728 l = device->brightness->levels[i];
1729 if (l < min)
1730 min = l;
1731 if (l > max)
1732 max = l;
1733 if (l < min_above && l > level_current)
1734 min_above = l;
1735 if (l > max_below && l < level_current)
1736 max_below = l;
1737 }
1738
1739 switch (event) {
1740 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1741 return (level_current < max) ? min_above : min;
1742 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1743 return (level_current < max) ? min_above : max;
1744 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1745 return (level_current > min) ? max_below : min;
1746 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1747 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1748 return 0;
1749 default:
1750 return level_current;
1751 }
1752 }
1753
1754 static void
1755 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1756 {
1757 unsigned long level_current, level_next;
1758 acpi_video_device_lcd_get_level_current(device, &level_current);
1759 level_next = acpi_video_get_next_level(device, level_current, event);
1760 acpi_video_device_lcd_set_level(device, level_next);
1761 }
1762
1763 static int
1764 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1765 struct acpi_device *device)
1766 {
1767 int status = 0;
1768 struct acpi_device *dev;
1769
1770 acpi_video_device_enumerate(video);
1771
1772 list_for_each_entry(dev, &device->children, node) {
1773
1774 status = acpi_video_bus_get_one_device(dev, video);
1775 if (ACPI_FAILURE(status)) {
1776 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1777 continue;
1778 }
1779 }
1780 return status;
1781 }
1782
1783 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1784 {
1785 acpi_status status;
1786 struct acpi_video_bus *video;
1787
1788
1789 if (!device || !device->video)
1790 return -ENOENT;
1791
1792 video = device->video;
1793
1794 acpi_video_device_remove_fs(device->dev);
1795
1796 status = acpi_remove_notify_handler(device->dev->handle,
1797 ACPI_DEVICE_NOTIFY,
1798 acpi_video_device_notify);
1799 backlight_device_unregister(device->backlight);
1800 if (device->cdev) {
1801 sysfs_remove_link(&device->dev->dev.kobj,
1802 "thermal_cooling");
1803 sysfs_remove_link(&device->cdev->device.kobj,
1804 "device");
1805 thermal_cooling_device_unregister(device->cdev);
1806 device->cdev = NULL;
1807 }
1808 video_output_unregister(device->output_dev);
1809
1810 return 0;
1811 }
1812
1813 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1814 {
1815 int status;
1816 struct acpi_video_device *dev, *next;
1817
1818 mutex_lock(&video->device_list_lock);
1819
1820 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1821
1822 status = acpi_video_bus_put_one_device(dev);
1823 if (ACPI_FAILURE(status))
1824 printk(KERN_WARNING PREFIX
1825 "hhuuhhuu bug in acpi video driver.\n");
1826
1827 if (dev->brightness) {
1828 kfree(dev->brightness->levels);
1829 kfree(dev->brightness);
1830 }
1831 list_del(&dev->entry);
1832 kfree(dev);
1833 }
1834
1835 mutex_unlock(&video->device_list_lock);
1836
1837 return 0;
1838 }
1839
1840 /* acpi_video interface */
1841
1842 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1843 {
1844 return acpi_video_bus_DOS(video, 0, 0);
1845 }
1846
1847 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1848 {
1849 return acpi_video_bus_DOS(video, 0, 1);
1850 }
1851
1852 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1853 {
1854 struct acpi_video_bus *video = data;
1855 struct acpi_device *device = NULL;
1856 struct input_dev *input;
1857 int keycode;
1858
1859 if (!video)
1860 return;
1861
1862 device = video->device;
1863 input = video->input;
1864
1865 switch (event) {
1866 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1867 * most likely via hotkey. */
1868 acpi_bus_generate_proc_event(device, event, 0);
1869 keycode = KEY_SWITCHVIDEOMODE;
1870 break;
1871
1872 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1873 * connector. */
1874 acpi_video_device_enumerate(video);
1875 acpi_video_device_rebind(video);
1876 acpi_video_switch_output(video, event);
1877 acpi_bus_generate_proc_event(device, event, 0);
1878 keycode = KEY_SWITCHVIDEOMODE;
1879 break;
1880
1881 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1882 acpi_video_switch_output(video, event);
1883 acpi_bus_generate_proc_event(device, event, 0);
1884 keycode = KEY_SWITCHVIDEOMODE;
1885 break;
1886 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1887 acpi_video_switch_output(video, event);
1888 acpi_bus_generate_proc_event(device, event, 0);
1889 keycode = KEY_VIDEO_NEXT;
1890 break;
1891 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1892 acpi_video_switch_output(video, event);
1893 acpi_bus_generate_proc_event(device, event, 0);
1894 keycode = KEY_VIDEO_PREV;
1895 break;
1896
1897 default:
1898 keycode = KEY_UNKNOWN;
1899 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1900 "Unsupported event [0x%x]\n", event));
1901 break;
1902 }
1903
1904 input_report_key(input, keycode, 1);
1905 input_sync(input);
1906 input_report_key(input, keycode, 0);
1907 input_sync(input);
1908
1909 return;
1910 }
1911
1912 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1913 {
1914 struct acpi_video_device *video_device = data;
1915 struct acpi_device *device = NULL;
1916 struct acpi_video_bus *bus;
1917 struct input_dev *input;
1918 int keycode;
1919
1920 if (!video_device)
1921 return;
1922
1923 device = video_device->dev;
1924 bus = video_device->video;
1925 input = bus->input;
1926
1927 switch (event) {
1928 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1929 acpi_video_switch_brightness(video_device, event);
1930 acpi_bus_generate_proc_event(device, event, 0);
1931 keycode = KEY_BRIGHTNESS_CYCLE;
1932 break;
1933 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1934 acpi_video_switch_brightness(video_device, event);
1935 acpi_bus_generate_proc_event(device, event, 0);
1936 keycode = KEY_BRIGHTNESSUP;
1937 break;
1938 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1939 acpi_video_switch_brightness(video_device, event);
1940 acpi_bus_generate_proc_event(device, event, 0);
1941 keycode = KEY_BRIGHTNESSDOWN;
1942 break;
1943 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1944 acpi_video_switch_brightness(video_device, event);
1945 acpi_bus_generate_proc_event(device, event, 0);
1946 keycode = KEY_BRIGHTNESS_ZERO;
1947 break;
1948 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1949 acpi_video_switch_brightness(video_device, event);
1950 acpi_bus_generate_proc_event(device, event, 0);
1951 keycode = KEY_DISPLAY_OFF;
1952 break;
1953 default:
1954 keycode = KEY_UNKNOWN;
1955 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1956 "Unsupported event [0x%x]\n", event));
1957 break;
1958 }
1959
1960 input_report_key(input, keycode, 1);
1961 input_sync(input);
1962 input_report_key(input, keycode, 0);
1963 input_sync(input);
1964
1965 return;
1966 }
1967
1968 static int instance;
1969 static int acpi_video_bus_add(struct acpi_device *device)
1970 {
1971 acpi_status status;
1972 struct acpi_video_bus *video;
1973 struct input_dev *input;
1974 int error;
1975
1976 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1977 if (!video)
1978 return -ENOMEM;
1979
1980 /* a hack to fix the duplicate name "VID" problem on T61 */
1981 if (!strcmp(device->pnp.bus_id, "VID")) {
1982 if (instance)
1983 device->pnp.bus_id[3] = '0' + instance;
1984 instance ++;
1985 }
1986
1987 video->device = device;
1988 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1989 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1990 acpi_driver_data(device) = video;
1991
1992 acpi_video_bus_find_cap(video);
1993 error = acpi_video_bus_check(video);
1994 if (error)
1995 goto err_free_video;
1996
1997 error = acpi_video_bus_add_fs(device);
1998 if (error)
1999 goto err_free_video;
2000
2001 mutex_init(&video->device_list_lock);
2002 INIT_LIST_HEAD(&video->video_device_list);
2003
2004 acpi_video_bus_get_devices(video, device);
2005 acpi_video_bus_start_devices(video);
2006
2007 status = acpi_install_notify_handler(device->handle,
2008 ACPI_DEVICE_NOTIFY,
2009 acpi_video_bus_notify, video);
2010 if (ACPI_FAILURE(status)) {
2011 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
2012 "Error installing notify handler\n"));
2013 error = -ENODEV;
2014 goto err_stop_video;
2015 }
2016
2017 video->input = input = input_allocate_device();
2018 if (!input) {
2019 error = -ENOMEM;
2020 goto err_uninstall_notify;
2021 }
2022
2023 snprintf(video->phys, sizeof(video->phys),
2024 "%s/video/input0", acpi_device_hid(video->device));
2025
2026 input->name = acpi_device_name(video->device);
2027 input->phys = video->phys;
2028 input->id.bustype = BUS_HOST;
2029 input->id.product = 0x06;
2030 input->dev.parent = &device->dev;
2031 input->evbit[0] = BIT(EV_KEY);
2032 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2033 set_bit(KEY_VIDEO_NEXT, input->keybit);
2034 set_bit(KEY_VIDEO_PREV, input->keybit);
2035 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2036 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2037 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2038 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2039 set_bit(KEY_DISPLAY_OFF, input->keybit);
2040 set_bit(KEY_UNKNOWN, input->keybit);
2041
2042 error = input_register_device(input);
2043 if (error)
2044 goto err_free_input_dev;
2045
2046 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2047 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2048 video->flags.multihead ? "yes" : "no",
2049 video->flags.rom ? "yes" : "no",
2050 video->flags.post ? "yes" : "no");
2051
2052 return 0;
2053
2054 err_free_input_dev:
2055 input_free_device(input);
2056 err_uninstall_notify:
2057 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2058 acpi_video_bus_notify);
2059 err_stop_video:
2060 acpi_video_bus_stop_devices(video);
2061 acpi_video_bus_put_devices(video);
2062 kfree(video->attached_array);
2063 acpi_video_bus_remove_fs(device);
2064 err_free_video:
2065 kfree(video);
2066 acpi_driver_data(device) = NULL;
2067
2068 return error;
2069 }
2070
2071 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2072 {
2073 acpi_status status = 0;
2074 struct acpi_video_bus *video = NULL;
2075
2076
2077 if (!device || !acpi_driver_data(device))
2078 return -EINVAL;
2079
2080 video = acpi_driver_data(device);
2081
2082 acpi_video_bus_stop_devices(video);
2083
2084 status = acpi_remove_notify_handler(video->device->handle,
2085 ACPI_DEVICE_NOTIFY,
2086 acpi_video_bus_notify);
2087
2088 acpi_video_bus_put_devices(video);
2089 acpi_video_bus_remove_fs(device);
2090
2091 input_unregister_device(video->input);
2092 kfree(video->attached_array);
2093 kfree(video);
2094
2095 return 0;
2096 }
2097
2098 static int __init acpi_video_init(void)
2099 {
2100 int result = 0;
2101
2102
2103 /*
2104 acpi_dbg_level = 0xFFFFFFFF;
2105 acpi_dbg_layer = 0x08000000;
2106 */
2107
2108 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2109 if (!acpi_video_dir)
2110 return -ENODEV;
2111 acpi_video_dir->owner = THIS_MODULE;
2112
2113 result = acpi_bus_register_driver(&acpi_video_bus);
2114 if (result < 0) {
2115 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2116 return -ENODEV;
2117 }
2118
2119 return 0;
2120 }
2121
2122 static void __exit acpi_video_exit(void)
2123 {
2124
2125 acpi_bus_unregister_driver(&acpi_video_bus);
2126
2127 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2128
2129 return;
2130 }
2131
2132 module_init(acpi_video_init);
2133 module_exit(acpi_video_exit);
Support for the Chinese Samsung S3C2440 based development boards