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Merge branch 'audit.b39' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit...
[mirror_ubuntu-bionic-kernel.git] / drivers / acpi / video.c
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/proc_fs.h>
33 #include <linux/seq_file.h>
34
35 #include <linux/backlight.h>
36 #include <linux/video_output.h>
37 #include <asm/uaccess.h>
38
39 #include <acpi/acpi_bus.h>
40 #include <acpi/acpi_drivers.h>
41
42 #define ACPI_VIDEO_COMPONENT 0x08000000
43 #define ACPI_VIDEO_CLASS "video"
44 #define ACPI_VIDEO_BUS_NAME "Video Bus"
45 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
46 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
47 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
48 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
49 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
50 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
51
52 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
53 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
54 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
55 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
56 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
57
58 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
59 #define ACPI_VIDEO_HEAD_END (~0u)
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 acpi_video_bus_add(struct acpi_device *device);
75 static int acpi_video_bus_remove(struct acpi_device *device, int type);
76
77 static struct acpi_driver acpi_video_bus = {
78 .name = "video",
79 .class = ACPI_VIDEO_CLASS,
80 .ids = ACPI_VIDEO_HID,
81 .ops = {
82 .add = acpi_video_bus_add,
83 .remove = acpi_video_bus_remove,
84 },
85 };
86
87 struct acpi_video_bus_flags {
88 u8 multihead:1; /* can switch video heads */
89 u8 rom:1; /* can retrieve a video rom */
90 u8 post:1; /* can configure the head to */
91 u8 reserved:5;
92 };
93
94 struct acpi_video_bus_cap {
95 u8 _DOS:1; /*Enable/Disable output switching */
96 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
97 u8 _ROM:1; /*Get ROM Data */
98 u8 _GPD:1; /*Get POST Device */
99 u8 _SPD:1; /*Set POST Device */
100 u8 _VPO:1; /*Video POST Options */
101 u8 reserved:2;
102 };
103
104 struct acpi_video_device_attrib {
105 u32 display_index:4; /* A zero-based instance of the Display */
106 u32 display_port_attachment:4; /*This field differentiates the display type */
107 u32 display_type:4; /*Describe the specific type in use */
108 u32 vendor_specific:4; /*Chipset Vendor Specific */
109 u32 bios_can_detect:1; /*BIOS can detect the device */
110 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
111 the VGA device. */
112 u32 pipe_id:3; /*For VGA multiple-head devices. */
113 u32 reserved:10; /*Must be 0 */
114 u32 device_id_scheme:1; /*Device ID Scheme */
115 };
116
117 struct acpi_video_enumerated_device {
118 union {
119 u32 int_val;
120 struct acpi_video_device_attrib attrib;
121 } value;
122 struct acpi_video_device *bind_info;
123 };
124
125 struct acpi_video_bus {
126 struct acpi_device *device;
127 u8 dos_setting;
128 struct acpi_video_enumerated_device *attached_array;
129 u8 attached_count;
130 struct acpi_video_bus_cap cap;
131 struct acpi_video_bus_flags flags;
132 struct semaphore sem;
133 struct list_head video_device_list;
134 struct proc_dir_entry *dir;
135 };
136
137 struct acpi_video_device_flags {
138 u8 crt:1;
139 u8 lcd:1;
140 u8 tvout:1;
141 u8 dvi:1;
142 u8 bios:1;
143 u8 unknown:1;
144 u8 reserved:2;
145 };
146
147 struct acpi_video_device_cap {
148 u8 _ADR:1; /*Return the unique ID */
149 u8 _BCL:1; /*Query list of brightness control levels supported */
150 u8 _BCM:1; /*Set the brightness level */
151 u8 _BQC:1; /* Get current brightness level */
152 u8 _DDC:1; /*Return the EDID for this device */
153 u8 _DCS:1; /*Return status of output device */
154 u8 _DGS:1; /*Query graphics state */
155 u8 _DSS:1; /*Device state set */
156 };
157
158 struct acpi_video_device_brightness {
159 int curr;
160 int count;
161 int *levels;
162 };
163
164 struct acpi_video_device {
165 unsigned long device_id;
166 struct acpi_video_device_flags flags;
167 struct acpi_video_device_cap cap;
168 struct list_head entry;
169 struct acpi_video_bus *video;
170 struct acpi_device *dev;
171 struct acpi_video_device_brightness *brightness;
172 struct backlight_device *backlight;
173 struct output_device *output_dev;
174 };
175
176 /* bus */
177 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
178 static struct file_operations acpi_video_bus_info_fops = {
179 .open = acpi_video_bus_info_open_fs,
180 .read = seq_read,
181 .llseek = seq_lseek,
182 .release = single_release,
183 };
184
185 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
186 static struct file_operations acpi_video_bus_ROM_fops = {
187 .open = acpi_video_bus_ROM_open_fs,
188 .read = seq_read,
189 .llseek = seq_lseek,
190 .release = single_release,
191 };
192
193 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
194 struct file *file);
195 static struct file_operations acpi_video_bus_POST_info_fops = {
196 .open = acpi_video_bus_POST_info_open_fs,
197 .read = seq_read,
198 .llseek = seq_lseek,
199 .release = single_release,
200 };
201
202 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
203 static struct file_operations acpi_video_bus_POST_fops = {
204 .open = acpi_video_bus_POST_open_fs,
205 .read = seq_read,
206 .llseek = seq_lseek,
207 .release = single_release,
208 };
209
210 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
211 static struct file_operations acpi_video_bus_DOS_fops = {
212 .open = acpi_video_bus_DOS_open_fs,
213 .read = seq_read,
214 .llseek = seq_lseek,
215 .release = single_release,
216 };
217
218 /* device */
219 static int acpi_video_device_info_open_fs(struct inode *inode,
220 struct file *file);
221 static struct file_operations acpi_video_device_info_fops = {
222 .open = acpi_video_device_info_open_fs,
223 .read = seq_read,
224 .llseek = seq_lseek,
225 .release = single_release,
226 };
227
228 static int acpi_video_device_state_open_fs(struct inode *inode,
229 struct file *file);
230 static struct file_operations acpi_video_device_state_fops = {
231 .open = acpi_video_device_state_open_fs,
232 .read = seq_read,
233 .llseek = seq_lseek,
234 .release = single_release,
235 };
236
237 static int acpi_video_device_brightness_open_fs(struct inode *inode,
238 struct file *file);
239 static struct file_operations acpi_video_device_brightness_fops = {
240 .open = acpi_video_device_brightness_open_fs,
241 .read = seq_read,
242 .llseek = seq_lseek,
243 .release = single_release,
244 };
245
246 static int acpi_video_device_EDID_open_fs(struct inode *inode,
247 struct file *file);
248 static struct file_operations acpi_video_device_EDID_fops = {
249 .open = acpi_video_device_EDID_open_fs,
250 .read = seq_read,
251 .llseek = seq_lseek,
252 .release = single_release,
253 };
254
255 static char device_decode[][30] = {
256 "motherboard VGA device",
257 "PCI VGA device",
258 "AGP VGA device",
259 "UNKNOWN",
260 };
261
262 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
263 static void acpi_video_device_rebind(struct acpi_video_bus *video);
264 static void acpi_video_device_bind(struct acpi_video_bus *video,
265 struct acpi_video_device *device);
266 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
267 static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
268 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
269 int level);
270 static int acpi_video_device_lcd_get_level_current(
271 struct acpi_video_device *device,
272 unsigned long *level);
273 static int acpi_video_get_next_level(struct acpi_video_device *device,
274 u32 level_current, u32 event);
275 static void acpi_video_switch_brightness(struct acpi_video_device *device,
276 int event);
277 static int acpi_video_device_get_state(struct acpi_video_device *device,
278 unsigned long *state);
279 static int acpi_video_output_get(struct output_device *od);
280 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
281
282 /*backlight device sysfs support*/
283 static int acpi_video_get_brightness(struct backlight_device *bd)
284 {
285 unsigned long cur_level;
286 struct acpi_video_device *vd =
287 (struct acpi_video_device *)class_get_devdata(&bd->class_dev);
288 acpi_video_device_lcd_get_level_current(vd, &cur_level);
289 return (int) cur_level;
290 }
291
292 static int acpi_video_set_brightness(struct backlight_device *bd)
293 {
294 int request_level = bd->props.brightness;
295 struct acpi_video_device *vd =
296 (struct acpi_video_device *)class_get_devdata(&bd->class_dev);
297 acpi_video_device_lcd_set_level(vd, request_level);
298 return 0;
299 }
300
301 static struct backlight_ops acpi_backlight_ops = {
302 .get_brightness = acpi_video_get_brightness,
303 .update_status = acpi_video_set_brightness,
304 };
305
306 /*video output device sysfs support*/
307 static int acpi_video_output_get(struct output_device *od)
308 {
309 unsigned long state;
310 struct acpi_video_device *vd =
311 (struct acpi_video_device *)class_get_devdata(&od->class_dev);
312 acpi_video_device_get_state(vd, &state);
313 return (int)state;
314 }
315
316 static int acpi_video_output_set(struct output_device *od)
317 {
318 unsigned long state = od->request_state;
319 struct acpi_video_device *vd=
320 (struct acpi_video_device *)class_get_devdata(&od->class_dev);
321 return acpi_video_device_set_state(vd, state);
322 }
323
324 static struct output_properties acpi_output_properties = {
325 .set_state = acpi_video_output_set,
326 .get_status = acpi_video_output_get,
327 };
328 /* --------------------------------------------------------------------------
329 Video Management
330 -------------------------------------------------------------------------- */
331
332 /* device */
333
334 static int
335 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
336 {
337 int status;
338
339 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
340
341 return status;
342 }
343
344 static int
345 acpi_video_device_get_state(struct acpi_video_device *device,
346 unsigned long *state)
347 {
348 int status;
349
350 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
351
352 return status;
353 }
354
355 static int
356 acpi_video_device_set_state(struct acpi_video_device *device, int state)
357 {
358 int status;
359 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
360 struct acpi_object_list args = { 1, &arg0 };
361 unsigned long ret;
362
363
364 arg0.integer.value = state;
365 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
366
367 return status;
368 }
369
370 static int
371 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
372 union acpi_object **levels)
373 {
374 int status;
375 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
376 union acpi_object *obj;
377
378
379 *levels = NULL;
380
381 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
382 if (!ACPI_SUCCESS(status))
383 return status;
384 obj = (union acpi_object *)buffer.pointer;
385 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
386 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
387 status = -EFAULT;
388 goto err;
389 }
390
391 *levels = obj;
392
393 return 0;
394
395 err:
396 kfree(buffer.pointer);
397
398 return status;
399 }
400
401 static int
402 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
403 {
404 int status;
405 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
406 struct acpi_object_list args = { 1, &arg0 };
407
408
409 arg0.integer.value = level;
410 status = acpi_evaluate_object(device->dev->handle, "_BCM", &args, NULL);
411
412 printk(KERN_DEBUG "set_level status: %x\n", status);
413 return status;
414 }
415
416 static int
417 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
418 unsigned long *level)
419 {
420 int status;
421
422 status = acpi_evaluate_integer(device->dev->handle, "_BQC", NULL, level);
423
424 return status;
425 }
426
427 static int
428 acpi_video_device_EDID(struct acpi_video_device *device,
429 union acpi_object **edid, ssize_t length)
430 {
431 int status;
432 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
433 union acpi_object *obj;
434 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
435 struct acpi_object_list args = { 1, &arg0 };
436
437
438 *edid = NULL;
439
440 if (!device)
441 return -ENODEV;
442 if (length == 128)
443 arg0.integer.value = 1;
444 else if (length == 256)
445 arg0.integer.value = 2;
446 else
447 return -EINVAL;
448
449 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
450 if (ACPI_FAILURE(status))
451 return -ENODEV;
452
453 obj = buffer.pointer;
454
455 if (obj && obj->type == ACPI_TYPE_BUFFER)
456 *edid = obj;
457 else {
458 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
459 status = -EFAULT;
460 kfree(obj);
461 }
462
463 return status;
464 }
465
466 /* bus */
467
468 static int
469 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
470 {
471 int status;
472 unsigned long tmp;
473 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
474 struct acpi_object_list args = { 1, &arg0 };
475
476
477 arg0.integer.value = option;
478
479 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
480 if (ACPI_SUCCESS(status))
481 status = tmp ? (-EINVAL) : (AE_OK);
482
483 return status;
484 }
485
486 static int
487 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
488 {
489 int status;
490
491 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
492
493 return status;
494 }
495
496 static int
497 acpi_video_bus_POST_options(struct acpi_video_bus *video,
498 unsigned long *options)
499 {
500 int status;
501
502 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
503 *options &= 3;
504
505 return status;
506 }
507
508 /*
509 * Arg:
510 * video : video bus device pointer
511 * bios_flag :
512 * 0. The system BIOS should NOT automatically switch(toggle)
513 * the active display output.
514 * 1. The system BIOS should automatically switch (toggle) the
515 * active display output. No switch event.
516 * 2. The _DGS value should be locked.
517 * 3. The system BIOS should not automatically switch (toggle) the
518 * active display output, but instead generate the display switch
519 * event notify code.
520 * lcd_flag :
521 * 0. The system BIOS should automatically control the brightness level
522 * of the LCD when the power changes from AC to DC
523 * 1. The system BIOS should NOT automatically control the brightness
524 * level of the LCD when the power changes from AC to DC.
525 * Return Value:
526 * -1 wrong arg.
527 */
528
529 static int
530 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
531 {
532 acpi_integer status = 0;
533 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
534 struct acpi_object_list args = { 1, &arg0 };
535
536
537 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
538 status = -1;
539 goto Failed;
540 }
541 arg0.integer.value = (lcd_flag << 2) | bios_flag;
542 video->dos_setting = arg0.integer.value;
543 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
544
545 Failed:
546 return status;
547 }
548
549 /*
550 * Arg:
551 * device : video output device (LCD, CRT, ..)
552 *
553 * Return Value:
554 * None
555 *
556 * Find out all required AML methods defined under the output
557 * device.
558 */
559
560 static void acpi_video_device_find_cap(struct acpi_video_device *device)
561 {
562 acpi_handle h_dummy1;
563 int i;
564 u32 max_level = 0;
565 union acpi_object *obj = NULL;
566 struct acpi_video_device_brightness *br = NULL;
567
568
569 memset(&device->cap, 0, 4);
570
571 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
572 device->cap._ADR = 1;
573 }
574 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
575 device->cap._BCL = 1;
576 }
577 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
578 device->cap._BCM = 1;
579 }
580 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
581 device->cap._BQC = 1;
582 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
583 device->cap._DDC = 1;
584 }
585 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
586 device->cap._DCS = 1;
587 }
588 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
589 device->cap._DGS = 1;
590 }
591 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
592 device->cap._DSS = 1;
593 }
594
595 if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
596
597 if (obj->package.count >= 2) {
598 int count = 0;
599 union acpi_object *o;
600
601 br = kzalloc(sizeof(*br), GFP_KERNEL);
602 if (!br) {
603 printk(KERN_ERR "can't allocate memory\n");
604 } else {
605 br->levels = kmalloc(obj->package.count *
606 sizeof *(br->levels), GFP_KERNEL);
607 if (!br->levels)
608 goto out;
609
610 for (i = 0; i < obj->package.count; i++) {
611 o = (union acpi_object *)&obj->package.
612 elements[i];
613 if (o->type != ACPI_TYPE_INTEGER) {
614 printk(KERN_ERR PREFIX "Invalid data\n");
615 continue;
616 }
617 br->levels[count] = (u32) o->integer.value;
618
619 if (br->levels[count] > max_level)
620 max_level = br->levels[count];
621 count++;
622 }
623 out:
624 if (count < 2) {
625 kfree(br->levels);
626 kfree(br);
627 } else {
628 br->count = count;
629 device->brightness = br;
630 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
631 "found %d brightness levels\n",
632 count));
633 }
634 }
635 }
636
637 } else {
638 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
639 }
640
641 kfree(obj);
642
643 if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
644 unsigned long tmp;
645 static int count = 0;
646 char *name;
647 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
648 if (!name)
649 return;
650
651 sprintf(name, "acpi_video%d", count++);
652 acpi_video_device_lcd_get_level_current(device, &tmp);
653 device->backlight = backlight_device_register(name,
654 NULL, device, &acpi_backlight_ops);
655 device->backlight->props.max_brightness = max_level;
656 device->backlight->props.brightness = (int)tmp;
657 backlight_update_status(device->backlight);
658
659 kfree(name);
660 }
661 if (device->cap._DCS && device->cap._DSS){
662 static int count = 0;
663 char *name;
664 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
665 if (!name)
666 return;
667 sprintf(name, "acpi_video%d", count++);
668 device->output_dev = video_output_register(name,
669 NULL, device, &acpi_output_properties);
670 kfree(name);
671 }
672 return;
673 }
674
675 /*
676 * Arg:
677 * device : video output device (VGA)
678 *
679 * Return Value:
680 * None
681 *
682 * Find out all required AML methods defined under the video bus device.
683 */
684
685 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
686 {
687 acpi_handle h_dummy1;
688
689 memset(&video->cap, 0, 4);
690 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
691 video->cap._DOS = 1;
692 }
693 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
694 video->cap._DOD = 1;
695 }
696 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
697 video->cap._ROM = 1;
698 }
699 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
700 video->cap._GPD = 1;
701 }
702 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
703 video->cap._SPD = 1;
704 }
705 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
706 video->cap._VPO = 1;
707 }
708 }
709
710 /*
711 * Check whether the video bus device has required AML method to
712 * support the desired features
713 */
714
715 static int acpi_video_bus_check(struct acpi_video_bus *video)
716 {
717 acpi_status status = -ENOENT;
718
719
720 if (!video)
721 return -EINVAL;
722
723 /* Since there is no HID, CID and so on for VGA driver, we have
724 * to check well known required nodes.
725 */
726
727 /* Does this device support video switching? */
728 if (video->cap._DOS) {
729 video->flags.multihead = 1;
730 status = 0;
731 }
732
733 /* Does this device support retrieving a video ROM? */
734 if (video->cap._ROM) {
735 video->flags.rom = 1;
736 status = 0;
737 }
738
739 /* Does this device support configuring which video device to POST? */
740 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
741 video->flags.post = 1;
742 status = 0;
743 }
744
745 return status;
746 }
747
748 /* --------------------------------------------------------------------------
749 FS Interface (/proc)
750 -------------------------------------------------------------------------- */
751
752 static struct proc_dir_entry *acpi_video_dir;
753
754 /* video devices */
755
756 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
757 {
758 struct acpi_video_device *dev = seq->private;
759
760
761 if (!dev)
762 goto end;
763
764 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
765 seq_printf(seq, "type: ");
766 if (dev->flags.crt)
767 seq_printf(seq, "CRT\n");
768 else if (dev->flags.lcd)
769 seq_printf(seq, "LCD\n");
770 else if (dev->flags.tvout)
771 seq_printf(seq, "TVOUT\n");
772 else if (dev->flags.dvi)
773 seq_printf(seq, "DVI\n");
774 else
775 seq_printf(seq, "UNKNOWN\n");
776
777 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
778
779 end:
780 return 0;
781 }
782
783 static int
784 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
785 {
786 return single_open(file, acpi_video_device_info_seq_show,
787 PDE(inode)->data);
788 }
789
790 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
791 {
792 int status;
793 struct acpi_video_device *dev = seq->private;
794 unsigned long state;
795
796
797 if (!dev)
798 goto end;
799
800 status = acpi_video_device_get_state(dev, &state);
801 seq_printf(seq, "state: ");
802 if (ACPI_SUCCESS(status))
803 seq_printf(seq, "0x%02lx\n", state);
804 else
805 seq_printf(seq, "<not supported>\n");
806
807 status = acpi_video_device_query(dev, &state);
808 seq_printf(seq, "query: ");
809 if (ACPI_SUCCESS(status))
810 seq_printf(seq, "0x%02lx\n", state);
811 else
812 seq_printf(seq, "<not supported>\n");
813
814 end:
815 return 0;
816 }
817
818 static int
819 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
820 {
821 return single_open(file, acpi_video_device_state_seq_show,
822 PDE(inode)->data);
823 }
824
825 static ssize_t
826 acpi_video_device_write_state(struct file *file,
827 const char __user * buffer,
828 size_t count, loff_t * data)
829 {
830 int status;
831 struct seq_file *m = file->private_data;
832 struct acpi_video_device *dev = m->private;
833 char str[12] = { 0 };
834 u32 state = 0;
835
836
837 if (!dev || count + 1 > sizeof str)
838 return -EINVAL;
839
840 if (copy_from_user(str, buffer, count))
841 return -EFAULT;
842
843 str[count] = 0;
844 state = simple_strtoul(str, NULL, 0);
845 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
846
847 status = acpi_video_device_set_state(dev, state);
848
849 if (status)
850 return -EFAULT;
851
852 return count;
853 }
854
855 static int
856 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
857 {
858 struct acpi_video_device *dev = seq->private;
859 int i;
860
861
862 if (!dev || !dev->brightness) {
863 seq_printf(seq, "<not supported>\n");
864 return 0;
865 }
866
867 seq_printf(seq, "levels: ");
868 for (i = 0; i < dev->brightness->count; i++)
869 seq_printf(seq, " %d", dev->brightness->levels[i]);
870 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
871
872 return 0;
873 }
874
875 static int
876 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
877 {
878 return single_open(file, acpi_video_device_brightness_seq_show,
879 PDE(inode)->data);
880 }
881
882 static ssize_t
883 acpi_video_device_write_brightness(struct file *file,
884 const char __user * buffer,
885 size_t count, loff_t * data)
886 {
887 struct seq_file *m = file->private_data;
888 struct acpi_video_device *dev = m->private;
889 char str[4] = { 0 };
890 unsigned int level = 0;
891 int i;
892
893
894 if (!dev || !dev->brightness || count + 1 > sizeof str)
895 return -EINVAL;
896
897 if (copy_from_user(str, buffer, count))
898 return -EFAULT;
899
900 str[count] = 0;
901 level = simple_strtoul(str, NULL, 0);
902
903 if (level > 100)
904 return -EFAULT;
905
906 /* validate through the list of available levels */
907 for (i = 0; i < dev->brightness->count; i++)
908 if (level == dev->brightness->levels[i]) {
909 if (ACPI_SUCCESS
910 (acpi_video_device_lcd_set_level(dev, level)))
911 dev->brightness->curr = level;
912 break;
913 }
914
915 return count;
916 }
917
918 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
919 {
920 struct acpi_video_device *dev = seq->private;
921 int status;
922 int i;
923 union acpi_object *edid = NULL;
924
925
926 if (!dev)
927 goto out;
928
929 status = acpi_video_device_EDID(dev, &edid, 128);
930 if (ACPI_FAILURE(status)) {
931 status = acpi_video_device_EDID(dev, &edid, 256);
932 }
933
934 if (ACPI_FAILURE(status)) {
935 goto out;
936 }
937
938 if (edid && edid->type == ACPI_TYPE_BUFFER) {
939 for (i = 0; i < edid->buffer.length; i++)
940 seq_putc(seq, edid->buffer.pointer[i]);
941 }
942
943 out:
944 if (!edid)
945 seq_printf(seq, "<not supported>\n");
946 else
947 kfree(edid);
948
949 return 0;
950 }
951
952 static int
953 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
954 {
955 return single_open(file, acpi_video_device_EDID_seq_show,
956 PDE(inode)->data);
957 }
958
959 static int acpi_video_device_add_fs(struct acpi_device *device)
960 {
961 struct proc_dir_entry *entry = NULL;
962 struct acpi_video_device *vid_dev;
963
964
965 if (!device)
966 return -ENODEV;
967
968 vid_dev = acpi_driver_data(device);
969 if (!vid_dev)
970 return -ENODEV;
971
972 if (!acpi_device_dir(device)) {
973 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
974 vid_dev->video->dir);
975 if (!acpi_device_dir(device))
976 return -ENODEV;
977 acpi_device_dir(device)->owner = THIS_MODULE;
978 }
979
980 /* 'info' [R] */
981 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
982 if (!entry)
983 return -ENODEV;
984 else {
985 entry->proc_fops = &acpi_video_device_info_fops;
986 entry->data = acpi_driver_data(device);
987 entry->owner = THIS_MODULE;
988 }
989
990 /* 'state' [R/W] */
991 entry =
992 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
993 acpi_device_dir(device));
994 if (!entry)
995 return -ENODEV;
996 else {
997 acpi_video_device_state_fops.write = acpi_video_device_write_state;
998 entry->proc_fops = &acpi_video_device_state_fops;
999 entry->data = acpi_driver_data(device);
1000 entry->owner = THIS_MODULE;
1001 }
1002
1003 /* 'brightness' [R/W] */
1004 entry =
1005 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1006 acpi_device_dir(device));
1007 if (!entry)
1008 return -ENODEV;
1009 else {
1010 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
1011 entry->proc_fops = &acpi_video_device_brightness_fops;
1012 entry->data = acpi_driver_data(device);
1013 entry->owner = THIS_MODULE;
1014 }
1015
1016 /* 'EDID' [R] */
1017 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
1018 if (!entry)
1019 return -ENODEV;
1020 else {
1021 entry->proc_fops = &acpi_video_device_EDID_fops;
1022 entry->data = acpi_driver_data(device);
1023 entry->owner = THIS_MODULE;
1024 }
1025
1026 return 0;
1027 }
1028
1029 static int acpi_video_device_remove_fs(struct acpi_device *device)
1030 {
1031 struct acpi_video_device *vid_dev;
1032
1033 vid_dev = acpi_driver_data(device);
1034 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1035 return -ENODEV;
1036
1037 if (acpi_device_dir(device)) {
1038 remove_proc_entry("info", acpi_device_dir(device));
1039 remove_proc_entry("state", acpi_device_dir(device));
1040 remove_proc_entry("brightness", acpi_device_dir(device));
1041 remove_proc_entry("EDID", acpi_device_dir(device));
1042 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1043 acpi_device_dir(device) = NULL;
1044 }
1045
1046 return 0;
1047 }
1048
1049 /* video bus */
1050 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1051 {
1052 struct acpi_video_bus *video = seq->private;
1053
1054
1055 if (!video)
1056 goto end;
1057
1058 seq_printf(seq, "Switching heads: %s\n",
1059 video->flags.multihead ? "yes" : "no");
1060 seq_printf(seq, "Video ROM: %s\n",
1061 video->flags.rom ? "yes" : "no");
1062 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1063 video->flags.post ? "yes" : "no");
1064
1065 end:
1066 return 0;
1067 }
1068
1069 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1070 {
1071 return single_open(file, acpi_video_bus_info_seq_show,
1072 PDE(inode)->data);
1073 }
1074
1075 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1076 {
1077 struct acpi_video_bus *video = seq->private;
1078
1079
1080 if (!video)
1081 goto end;
1082
1083 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1084 seq_printf(seq, "<TODO>\n");
1085
1086 end:
1087 return 0;
1088 }
1089
1090 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1091 {
1092 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1093 }
1094
1095 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1096 {
1097 struct acpi_video_bus *video = seq->private;
1098 unsigned long options;
1099 int status;
1100
1101
1102 if (!video)
1103 goto end;
1104
1105 status = acpi_video_bus_POST_options(video, &options);
1106 if (ACPI_SUCCESS(status)) {
1107 if (!(options & 1)) {
1108 printk(KERN_WARNING PREFIX
1109 "The motherboard VGA device is not listed as a possible POST device.\n");
1110 printk(KERN_WARNING PREFIX
1111 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1112 }
1113 printk("%lx\n", options);
1114 seq_printf(seq, "can POST: <integrated video>");
1115 if (options & 2)
1116 seq_printf(seq, " <PCI video>");
1117 if (options & 4)
1118 seq_printf(seq, " <AGP video>");
1119 seq_putc(seq, '\n');
1120 } else
1121 seq_printf(seq, "<not supported>\n");
1122 end:
1123 return 0;
1124 }
1125
1126 static int
1127 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1128 {
1129 return single_open(file, acpi_video_bus_POST_info_seq_show,
1130 PDE(inode)->data);
1131 }
1132
1133 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1134 {
1135 struct acpi_video_bus *video = seq->private;
1136 int status;
1137 unsigned long id;
1138
1139
1140 if (!video)
1141 goto end;
1142
1143 status = acpi_video_bus_get_POST(video, &id);
1144 if (!ACPI_SUCCESS(status)) {
1145 seq_printf(seq, "<not supported>\n");
1146 goto end;
1147 }
1148 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1149
1150 end:
1151 return 0;
1152 }
1153
1154 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1155 {
1156 struct acpi_video_bus *video = seq->private;
1157
1158
1159 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1160
1161 return 0;
1162 }
1163
1164 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1165 {
1166 return single_open(file, acpi_video_bus_POST_seq_show,
1167 PDE(inode)->data);
1168 }
1169
1170 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1171 {
1172 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1173 }
1174
1175 static ssize_t
1176 acpi_video_bus_write_POST(struct file *file,
1177 const char __user * buffer,
1178 size_t count, loff_t * data)
1179 {
1180 int status;
1181 struct seq_file *m = file->private_data;
1182 struct acpi_video_bus *video = m->private;
1183 char str[12] = { 0 };
1184 unsigned long opt, options;
1185
1186
1187 if (!video || count + 1 > sizeof str)
1188 return -EINVAL;
1189
1190 status = acpi_video_bus_POST_options(video, &options);
1191 if (!ACPI_SUCCESS(status))
1192 return -EINVAL;
1193
1194 if (copy_from_user(str, buffer, count))
1195 return -EFAULT;
1196
1197 str[count] = 0;
1198 opt = strtoul(str, NULL, 0);
1199 if (opt > 3)
1200 return -EFAULT;
1201
1202 /* just in case an OEM 'forgot' the motherboard... */
1203 options |= 1;
1204
1205 if (options & (1ul << opt)) {
1206 status = acpi_video_bus_set_POST(video, opt);
1207 if (!ACPI_SUCCESS(status))
1208 return -EFAULT;
1209
1210 }
1211
1212 return count;
1213 }
1214
1215 static ssize_t
1216 acpi_video_bus_write_DOS(struct file *file,
1217 const char __user * buffer,
1218 size_t count, loff_t * data)
1219 {
1220 int status;
1221 struct seq_file *m = file->private_data;
1222 struct acpi_video_bus *video = m->private;
1223 char str[12] = { 0 };
1224 unsigned long opt;
1225
1226
1227 if (!video || count + 1 > sizeof str)
1228 return -EINVAL;
1229
1230 if (copy_from_user(str, buffer, count))
1231 return -EFAULT;
1232
1233 str[count] = 0;
1234 opt = strtoul(str, NULL, 0);
1235 if (opt > 7)
1236 return -EFAULT;
1237
1238 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1239
1240 if (!ACPI_SUCCESS(status))
1241 return -EFAULT;
1242
1243 return count;
1244 }
1245
1246 static int acpi_video_bus_add_fs(struct acpi_device *device)
1247 {
1248 struct proc_dir_entry *entry = NULL;
1249 struct acpi_video_bus *video;
1250
1251
1252 video = acpi_driver_data(device);
1253
1254 if (!acpi_device_dir(device)) {
1255 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1256 acpi_video_dir);
1257 if (!acpi_device_dir(device))
1258 return -ENODEV;
1259 video->dir = acpi_device_dir(device);
1260 acpi_device_dir(device)->owner = THIS_MODULE;
1261 }
1262
1263 /* 'info' [R] */
1264 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1265 if (!entry)
1266 return -ENODEV;
1267 else {
1268 entry->proc_fops = &acpi_video_bus_info_fops;
1269 entry->data = acpi_driver_data(device);
1270 entry->owner = THIS_MODULE;
1271 }
1272
1273 /* 'ROM' [R] */
1274 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1275 if (!entry)
1276 return -ENODEV;
1277 else {
1278 entry->proc_fops = &acpi_video_bus_ROM_fops;
1279 entry->data = acpi_driver_data(device);
1280 entry->owner = THIS_MODULE;
1281 }
1282
1283 /* 'POST_info' [R] */
1284 entry =
1285 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1286 if (!entry)
1287 return -ENODEV;
1288 else {
1289 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1290 entry->data = acpi_driver_data(device);
1291 entry->owner = THIS_MODULE;
1292 }
1293
1294 /* 'POST' [R/W] */
1295 entry =
1296 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1297 acpi_device_dir(device));
1298 if (!entry)
1299 return -ENODEV;
1300 else {
1301 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1302 entry->proc_fops = &acpi_video_bus_POST_fops;
1303 entry->data = acpi_driver_data(device);
1304 entry->owner = THIS_MODULE;
1305 }
1306
1307 /* 'DOS' [R/W] */
1308 entry =
1309 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1310 acpi_device_dir(device));
1311 if (!entry)
1312 return -ENODEV;
1313 else {
1314 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1315 entry->proc_fops = &acpi_video_bus_DOS_fops;
1316 entry->data = acpi_driver_data(device);
1317 entry->owner = THIS_MODULE;
1318 }
1319
1320 return 0;
1321 }
1322
1323 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1324 {
1325 struct acpi_video_bus *video;
1326
1327
1328 video = acpi_driver_data(device);
1329
1330 if (acpi_device_dir(device)) {
1331 remove_proc_entry("info", acpi_device_dir(device));
1332 remove_proc_entry("ROM", acpi_device_dir(device));
1333 remove_proc_entry("POST_info", acpi_device_dir(device));
1334 remove_proc_entry("POST", acpi_device_dir(device));
1335 remove_proc_entry("DOS", acpi_device_dir(device));
1336 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1337 acpi_device_dir(device) = NULL;
1338 }
1339
1340 return 0;
1341 }
1342
1343 /* --------------------------------------------------------------------------
1344 Driver Interface
1345 -------------------------------------------------------------------------- */
1346
1347 /* device interface */
1348 static struct acpi_video_device_attrib*
1349 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1350 {
1351 int count;
1352
1353 for(count = 0; count < video->attached_count; count++)
1354 if((video->attached_array[count].value.int_val & 0xffff) == device_id)
1355 return &(video->attached_array[count].value.attrib);
1356 return NULL;
1357 }
1358
1359 static int
1360 acpi_video_bus_get_one_device(struct acpi_device *device,
1361 struct acpi_video_bus *video)
1362 {
1363 unsigned long device_id;
1364 int status;
1365 struct acpi_video_device *data;
1366 struct acpi_video_device_attrib* attribute;
1367
1368 if (!device || !video)
1369 return -EINVAL;
1370
1371 status =
1372 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1373 if (ACPI_SUCCESS(status)) {
1374
1375 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1376 if (!data)
1377 return -ENOMEM;
1378
1379 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1380 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1381 acpi_driver_data(device) = data;
1382
1383 data->device_id = device_id;
1384 data->video = video;
1385 data->dev = device;
1386
1387 attribute = acpi_video_get_device_attr(video, device_id);
1388
1389 if((attribute != NULL) && attribute->device_id_scheme) {
1390 switch (attribute->display_type) {
1391 case ACPI_VIDEO_DISPLAY_CRT:
1392 data->flags.crt = 1;
1393 break;
1394 case ACPI_VIDEO_DISPLAY_TV:
1395 data->flags.tvout = 1;
1396 break;
1397 case ACPI_VIDEO_DISPLAY_DVI:
1398 data->flags.dvi = 1;
1399 break;
1400 case ACPI_VIDEO_DISPLAY_LCD:
1401 data->flags.lcd = 1;
1402 break;
1403 default:
1404 data->flags.unknown = 1;
1405 break;
1406 }
1407 if(attribute->bios_can_detect)
1408 data->flags.bios = 1;
1409 } else
1410 data->flags.unknown = 1;
1411
1412 acpi_video_device_bind(video, data);
1413 acpi_video_device_find_cap(data);
1414
1415 status = acpi_install_notify_handler(device->handle,
1416 ACPI_DEVICE_NOTIFY,
1417 acpi_video_device_notify,
1418 data);
1419 if (ACPI_FAILURE(status)) {
1420 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1421 "Error installing notify handler\n"));
1422 if(data->brightness)
1423 kfree(data->brightness->levels);
1424 kfree(data->brightness);
1425 kfree(data);
1426 return -ENODEV;
1427 }
1428
1429 down(&video->sem);
1430 list_add_tail(&data->entry, &video->video_device_list);
1431 up(&video->sem);
1432
1433 acpi_video_device_add_fs(device);
1434
1435 return 0;
1436 }
1437
1438 return -ENOENT;
1439 }
1440
1441 /*
1442 * Arg:
1443 * video : video bus device
1444 *
1445 * Return:
1446 * none
1447 *
1448 * Enumerate the video device list of the video bus,
1449 * bind the ids with the corresponding video devices
1450 * under the video bus.
1451 */
1452
1453 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1454 {
1455 struct list_head *node, *next;
1456 list_for_each_safe(node, next, &video->video_device_list) {
1457 struct acpi_video_device *dev =
1458 container_of(node, struct acpi_video_device, entry);
1459 acpi_video_device_bind(video, dev);
1460 }
1461 }
1462
1463 /*
1464 * Arg:
1465 * video : video bus device
1466 * device : video output device under the video
1467 * bus
1468 *
1469 * Return:
1470 * none
1471 *
1472 * Bind the ids with the corresponding video devices
1473 * under the video bus.
1474 */
1475
1476 static void
1477 acpi_video_device_bind(struct acpi_video_bus *video,
1478 struct acpi_video_device *device)
1479 {
1480 int i;
1481
1482 #define IDS_VAL(i) video->attached_array[i].value.int_val
1483 #define IDS_BIND(i) video->attached_array[i].bind_info
1484
1485 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1486 i < video->attached_count; i++) {
1487 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1488 IDS_BIND(i) = device;
1489 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1490 }
1491 }
1492 #undef IDS_VAL
1493 #undef IDS_BIND
1494 }
1495
1496 /*
1497 * Arg:
1498 * video : video bus device
1499 *
1500 * Return:
1501 * < 0 : error
1502 *
1503 * Call _DOD to enumerate all devices attached to display adapter
1504 *
1505 */
1506
1507 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1508 {
1509 int status;
1510 int count;
1511 int i;
1512 struct acpi_video_enumerated_device *active_device_list;
1513 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1514 union acpi_object *dod = NULL;
1515 union acpi_object *obj;
1516
1517 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1518 if (!ACPI_SUCCESS(status)) {
1519 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1520 return status;
1521 }
1522
1523 dod = buffer.pointer;
1524 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1525 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1526 status = -EFAULT;
1527 goto out;
1528 }
1529
1530 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1531 dod->package.count));
1532
1533 active_device_list = kmalloc((1 +
1534 dod->package.count) *
1535 sizeof(struct
1536 acpi_video_enumerated_device),
1537 GFP_KERNEL);
1538
1539 if (!active_device_list) {
1540 status = -ENOMEM;
1541 goto out;
1542 }
1543
1544 count = 0;
1545 for (i = 0; i < dod->package.count; i++) {
1546 obj = &dod->package.elements[i];
1547
1548 if (obj->type != ACPI_TYPE_INTEGER) {
1549 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1550 active_device_list[i].value.int_val =
1551 ACPI_VIDEO_HEAD_INVALID;
1552 }
1553 active_device_list[i].value.int_val = obj->integer.value;
1554 active_device_list[i].bind_info = NULL;
1555 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1556 (int)obj->integer.value));
1557 count++;
1558 }
1559 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1560
1561 kfree(video->attached_array);
1562
1563 video->attached_array = active_device_list;
1564 video->attached_count = count;
1565 out:
1566 kfree(buffer.pointer);
1567 return status;
1568 }
1569
1570 /*
1571 * Arg:
1572 * video : video bus device
1573 * event : notify event
1574 *
1575 * Return:
1576 * < 0 : error
1577 *
1578 * 1. Find out the current active output device.
1579 * 2. Identify the next output device to switch to.
1580 * 3. call _DSS to do actual switch.
1581 */
1582
1583 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1584 {
1585 struct list_head *node, *next;
1586 struct acpi_video_device *dev = NULL;
1587 struct acpi_video_device *dev_next = NULL;
1588 struct acpi_video_device *dev_prev = NULL;
1589 unsigned long state;
1590 int status = 0;
1591
1592
1593 list_for_each_safe(node, next, &video->video_device_list) {
1594 dev = container_of(node, struct acpi_video_device, entry);
1595 status = acpi_video_device_get_state(dev, &state);
1596 if (state & 0x2) {
1597 dev_next =
1598 container_of(node->next, struct acpi_video_device,
1599 entry);
1600 dev_prev =
1601 container_of(node->prev, struct acpi_video_device,
1602 entry);
1603 goto out;
1604 }
1605 }
1606 dev_next = container_of(node->next, struct acpi_video_device, entry);
1607 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1608 out:
1609 switch (event) {
1610 case ACPI_VIDEO_NOTIFY_CYCLE:
1611 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1612 acpi_video_device_set_state(dev, 0);
1613 acpi_video_device_set_state(dev_next, 0x80000001);
1614 break;
1615 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1616 acpi_video_device_set_state(dev, 0);
1617 acpi_video_device_set_state(dev_prev, 0x80000001);
1618 default:
1619 break;
1620 }
1621
1622 return status;
1623 }
1624
1625 static int
1626 acpi_video_get_next_level(struct acpi_video_device *device,
1627 u32 level_current, u32 event)
1628 {
1629 int min, max, min_above, max_below, i, l;
1630 max = max_below = 0;
1631 min = min_above = 255;
1632 for (i = 0; i < device->brightness->count; i++) {
1633 l = device->brightness->levels[i];
1634 if (l < min)
1635 min = l;
1636 if (l > max)
1637 max = l;
1638 if (l < min_above && l > level_current)
1639 min_above = l;
1640 if (l > max_below && l < level_current)
1641 max_below = l;
1642 }
1643
1644 switch (event) {
1645 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1646 return (level_current < max) ? min_above : min;
1647 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1648 return (level_current < max) ? min_above : max;
1649 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1650 return (level_current > min) ? max_below : min;
1651 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1652 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1653 return 0;
1654 default:
1655 return level_current;
1656 }
1657 }
1658
1659 static void
1660 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1661 {
1662 unsigned long level_current, level_next;
1663 acpi_video_device_lcd_get_level_current(device, &level_current);
1664 level_next = acpi_video_get_next_level(device, level_current, event);
1665 acpi_video_device_lcd_set_level(device, level_next);
1666 }
1667
1668 static int
1669 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1670 struct acpi_device *device)
1671 {
1672 int status = 0;
1673 struct list_head *node, *next;
1674
1675
1676 acpi_video_device_enumerate(video);
1677
1678 list_for_each_safe(node, next, &device->children) {
1679 struct acpi_device *dev =
1680 list_entry(node, struct acpi_device, node);
1681
1682 if (!dev)
1683 continue;
1684
1685 status = acpi_video_bus_get_one_device(dev, video);
1686 if (ACPI_FAILURE(status)) {
1687 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1688 continue;
1689 }
1690
1691 }
1692 return status;
1693 }
1694
1695 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1696 {
1697 acpi_status status;
1698 struct acpi_video_bus *video;
1699
1700
1701 if (!device || !device->video)
1702 return -ENOENT;
1703
1704 video = device->video;
1705
1706 down(&video->sem);
1707 list_del(&device->entry);
1708 up(&video->sem);
1709 acpi_video_device_remove_fs(device->dev);
1710
1711 status = acpi_remove_notify_handler(device->dev->handle,
1712 ACPI_DEVICE_NOTIFY,
1713 acpi_video_device_notify);
1714 backlight_device_unregister(device->backlight);
1715 video_output_unregister(device->output_dev);
1716 return 0;
1717 }
1718
1719 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1720 {
1721 int status;
1722 struct list_head *node, *next;
1723
1724
1725 list_for_each_safe(node, next, &video->video_device_list) {
1726 struct acpi_video_device *data =
1727 list_entry(node, struct acpi_video_device, entry);
1728 if (!data)
1729 continue;
1730
1731 status = acpi_video_bus_put_one_device(data);
1732 if (ACPI_FAILURE(status))
1733 printk(KERN_WARNING PREFIX
1734 "hhuuhhuu bug in acpi video driver.\n");
1735
1736 if (data->brightness)
1737 kfree(data->brightness->levels);
1738 kfree(data->brightness);
1739 kfree(data);
1740 }
1741
1742 return 0;
1743 }
1744
1745 /* acpi_video interface */
1746
1747 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1748 {
1749 return acpi_video_bus_DOS(video, 1, 0);
1750 }
1751
1752 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1753 {
1754 return acpi_video_bus_DOS(video, 0, 1);
1755 }
1756
1757 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1758 {
1759 struct acpi_video_bus *video = data;
1760 struct acpi_device *device = NULL;
1761
1762 printk("video bus notify\n");
1763
1764 if (!video)
1765 return;
1766
1767 device = video->device;
1768
1769 switch (event) {
1770 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1771 * most likely via hotkey. */
1772 acpi_bus_generate_event(device, event, 0);
1773 break;
1774
1775 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1776 * connector. */
1777 acpi_video_device_enumerate(video);
1778 acpi_video_device_rebind(video);
1779 acpi_video_switch_output(video, event);
1780 acpi_bus_generate_event(device, event, 0);
1781 break;
1782
1783 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1784 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1785 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1786 acpi_video_switch_output(video, event);
1787 acpi_bus_generate_event(device, event, 0);
1788 break;
1789
1790 default:
1791 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1792 "Unsupported event [0x%x]\n", event));
1793 break;
1794 }
1795
1796 return;
1797 }
1798
1799 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1800 {
1801 struct acpi_video_device *video_device = data;
1802 struct acpi_device *device = NULL;
1803
1804 if (!video_device)
1805 return;
1806
1807 device = video_device->dev;
1808
1809 switch (event) {
1810 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1811 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1812 acpi_bus_generate_event(device, event, 0);
1813 break;
1814 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1815 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1816 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1817 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1818 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1819 acpi_video_switch_brightness(video_device, event);
1820 acpi_bus_generate_event(device, event, 0);
1821 break;
1822 default:
1823 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1824 "Unsupported event [0x%x]\n", event));
1825 break;
1826 }
1827 return;
1828 }
1829
1830 static int acpi_video_bus_add(struct acpi_device *device)
1831 {
1832 int result = 0;
1833 acpi_status status = 0;
1834 struct acpi_video_bus *video = NULL;
1835
1836
1837 if (!device)
1838 return -EINVAL;
1839
1840 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1841 if (!video)
1842 return -ENOMEM;
1843
1844 video->device = device;
1845 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1846 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1847 acpi_driver_data(device) = video;
1848
1849 acpi_video_bus_find_cap(video);
1850 result = acpi_video_bus_check(video);
1851 if (result)
1852 goto end;
1853
1854 result = acpi_video_bus_add_fs(device);
1855 if (result)
1856 goto end;
1857
1858 init_MUTEX(&video->sem);
1859 INIT_LIST_HEAD(&video->video_device_list);
1860
1861 acpi_video_bus_get_devices(video, device);
1862 acpi_video_bus_start_devices(video);
1863
1864 status = acpi_install_notify_handler(device->handle,
1865 ACPI_DEVICE_NOTIFY,
1866 acpi_video_bus_notify, video);
1867 if (ACPI_FAILURE(status)) {
1868 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1869 "Error installing notify handler\n"));
1870 acpi_video_bus_stop_devices(video);
1871 acpi_video_bus_put_devices(video);
1872 kfree(video->attached_array);
1873 acpi_video_bus_remove_fs(device);
1874 result = -ENODEV;
1875 goto end;
1876 }
1877
1878 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1879 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1880 video->flags.multihead ? "yes" : "no",
1881 video->flags.rom ? "yes" : "no",
1882 video->flags.post ? "yes" : "no");
1883
1884 end:
1885 if (result)
1886 kfree(video);
1887
1888 return result;
1889 }
1890
1891 static int acpi_video_bus_remove(struct acpi_device *device, int type)
1892 {
1893 acpi_status status = 0;
1894 struct acpi_video_bus *video = NULL;
1895
1896
1897 if (!device || !acpi_driver_data(device))
1898 return -EINVAL;
1899
1900 video = acpi_driver_data(device);
1901
1902 acpi_video_bus_stop_devices(video);
1903
1904 status = acpi_remove_notify_handler(video->device->handle,
1905 ACPI_DEVICE_NOTIFY,
1906 acpi_video_bus_notify);
1907
1908 acpi_video_bus_put_devices(video);
1909 acpi_video_bus_remove_fs(device);
1910
1911 kfree(video->attached_array);
1912 kfree(video);
1913
1914 return 0;
1915 }
1916
1917 static int __init acpi_video_init(void)
1918 {
1919 int result = 0;
1920
1921
1922 /*
1923 acpi_dbg_level = 0xFFFFFFFF;
1924 acpi_dbg_layer = 0x08000000;
1925 */
1926
1927 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1928 if (!acpi_video_dir)
1929 return -ENODEV;
1930 acpi_video_dir->owner = THIS_MODULE;
1931
1932 result = acpi_bus_register_driver(&acpi_video_bus);
1933 if (result < 0) {
1934 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1935 return -ENODEV;
1936 }
1937
1938 return 0;
1939 }
1940
1941 static void __exit acpi_video_exit(void)
1942 {
1943
1944 acpi_bus_unregister_driver(&acpi_video_bus);
1945
1946 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1947
1948 return;
1949 }
1950
1951 module_init(acpi_video_init);
1952 module_exit(acpi_video_exit);
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