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