?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Char: moxa, remove sleep_on
[linux-2.6/mini2440.git] / drivers / acpi / video.c
blobb8a2095cb5ee44f3ceea40ccdf7d11c9c9c58ca0
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 *)dev_get_drvdata(&od->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 *)dev_get_drvdata(&od->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 return status;
421 }
422
423 static int
424 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
425 unsigned long *level)
426 {
427 int status;
428
429 status = acpi_evaluate_integer(device->dev->handle, "_BQC", NULL, level);
430
431 return status;
432 }
433
434 static int
435 acpi_video_device_EDID(struct acpi_video_device *device,
436 union acpi_object **edid, ssize_t length)
437 {
438 int status;
439 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
440 union acpi_object *obj;
441 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
442 struct acpi_object_list args = { 1, &arg0 };
443
444
445 *edid = NULL;
446
447 if (!device)
448 return -ENODEV;
449 if (length == 128)
450 arg0.integer.value = 1;
451 else if (length == 256)
452 arg0.integer.value = 2;
453 else
454 return -EINVAL;
455
456 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
457 if (ACPI_FAILURE(status))
458 return -ENODEV;
459
460 obj = buffer.pointer;
461
462 if (obj && obj->type == ACPI_TYPE_BUFFER)
463 *edid = obj;
464 else {
465 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
466 status = -EFAULT;
467 kfree(obj);
468 }
469
470 return status;
471 }
472
473 /* bus */
474
475 static int
476 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
477 {
478 int status;
479 unsigned long tmp;
480 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
481 struct acpi_object_list args = { 1, &arg0 };
482
483
484 arg0.integer.value = option;
485
486 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
487 if (ACPI_SUCCESS(status))
488 status = tmp ? (-EINVAL) : (AE_OK);
489
490 return status;
491 }
492
493 static int
494 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
495 {
496 int status;
497
498 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
499
500 return status;
501 }
502
503 static int
504 acpi_video_bus_POST_options(struct acpi_video_bus *video,
505 unsigned long *options)
506 {
507 int status;
508
509 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
510 *options &= 3;
511
512 return status;
513 }
514
515 /*
516 * Arg:
517 * video : video bus device pointer
518 * bios_flag :
519 * 0. The system BIOS should NOT automatically switch(toggle)
520 * the active display output.
521 * 1. The system BIOS should automatically switch (toggle) the
522 * active display output. No switch event.
523 * 2. The _DGS value should be locked.
524 * 3. The system BIOS should not automatically switch (toggle) the
525 * active display output, but instead generate the display switch
526 * event notify code.
527 * lcd_flag :
528 * 0. The system BIOS should automatically control the brightness level
529 * of the LCD when the power changes from AC to DC
530 * 1. The system BIOS should NOT automatically control the brightness
531 * level of the LCD when the power changes from AC to DC.
532 * Return Value:
533 * -1 wrong arg.
534 */
535
536 static int
537 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
538 {
539 acpi_integer status = 0;
540 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
541 struct acpi_object_list args = { 1, &arg0 };
542
543
544 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
545 status = -1;
546 goto Failed;
547 }
548 arg0.integer.value = (lcd_flag << 2) | bios_flag;
549 video->dos_setting = arg0.integer.value;
550 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
551
552 Failed:
553 return status;
554 }
555
556 /*
557 * Arg:
558 * device : video output device (LCD, CRT, ..)
559 *
560 * Return Value:
561 * None
562 *
563 * Find out all required AML methods defined under the output
564 * device.
565 */
566
567 static void acpi_video_device_find_cap(struct acpi_video_device *device)
568 {
569 acpi_handle h_dummy1;
570 int i;
571 u32 max_level = 0;
572 union acpi_object *obj = NULL;
573 struct acpi_video_device_brightness *br = NULL;
574
575
576 memset(&device->cap, 0, 4);
577
578 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
579 device->cap._ADR = 1;
580 }
581 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
582 device->cap._BCL = 1;
583 }
584 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
585 device->cap._BCM = 1;
586 }
587 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
588 device->cap._BQC = 1;
589 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
590 device->cap._DDC = 1;
591 }
592 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
593 device->cap._DCS = 1;
594 }
595 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
596 device->cap._DGS = 1;
597 }
598 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
599 device->cap._DSS = 1;
600 }
601
602 if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
603
604 if (obj->package.count >= 2) {
605 int count = 0;
606 union acpi_object *o;
607
608 br = kzalloc(sizeof(*br), GFP_KERNEL);
609 if (!br) {
610 printk(KERN_ERR "can't allocate memory\n");
611 } else {
612 br->levels = kmalloc(obj->package.count *
613 sizeof *(br->levels), GFP_KERNEL);
614 if (!br->levels)
615 goto out;
616
617 for (i = 0; i < obj->package.count; i++) {
618 o = (union acpi_object *)&obj->package.
619 elements[i];
620 if (o->type != ACPI_TYPE_INTEGER) {
621 printk(KERN_ERR PREFIX "Invalid data\n");
622 continue;
623 }
624 br->levels[count] = (u32) o->integer.value;
625
626 if (br->levels[count] > max_level)
627 max_level = br->levels[count];
628 count++;
629 }
630 out:
631 if (count < 2) {
632 kfree(br->levels);
633 kfree(br);
634 } else {
635 br->count = count;
636 device->brightness = br;
637 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
638 "found %d brightness levels\n",
639 count));
640 }
641 }
642 }
643
644 } else {
645 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
646 }
647
648 kfree(obj);
649
650 if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
651 unsigned long tmp;
652 static int count = 0;
653 char *name;
654 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
655 if (!name)
656 return;
657
658 sprintf(name, "acpi_video%d", count++);
659 acpi_video_device_lcd_get_level_current(device, &tmp);
660 device->backlight = backlight_device_register(name,
661 NULL, device, &acpi_backlight_ops);
662 device->backlight->props.max_brightness = max_level;
663 device->backlight->props.brightness = (int)tmp;
664 backlight_update_status(device->backlight);
665
666 kfree(name);
667 }
668 if (device->cap._DCS && device->cap._DSS){
669 static int count = 0;
670 char *name;
671 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
672 if (!name)
673 return;
674 sprintf(name, "acpi_video%d", count++);
675 device->output_dev = video_output_register(name,
676 NULL, device, &acpi_output_properties);
677 kfree(name);
678 }
679 return;
680 }
681
682 /*
683 * Arg:
684 * device : video output device (VGA)
685 *
686 * Return Value:
687 * None
688 *
689 * Find out all required AML methods defined under the video bus device.
690 */
691
692 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
693 {
694 acpi_handle h_dummy1;
695
696 memset(&video->cap, 0, 4);
697 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
698 video->cap._DOS = 1;
699 }
700 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
701 video->cap._DOD = 1;
702 }
703 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
704 video->cap._ROM = 1;
705 }
706 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
707 video->cap._GPD = 1;
708 }
709 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
710 video->cap._SPD = 1;
711 }
712 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
713 video->cap._VPO = 1;
714 }
715 }
716
717 /*
718 * Check whether the video bus device has required AML method to
719 * support the desired features
720 */
721
722 static int acpi_video_bus_check(struct acpi_video_bus *video)
723 {
724 acpi_status status = -ENOENT;
725
726
727 if (!video)
728 return -EINVAL;
729
730 /* Since there is no HID, CID and so on for VGA driver, we have
731 * to check well known required nodes.
732 */
733
734 /* Does this device support video switching? */
735 if (video->cap._DOS) {
736 video->flags.multihead = 1;
737 status = 0;
738 }
739
740 /* Does this device support retrieving a video ROM? */
741 if (video->cap._ROM) {
742 video->flags.rom = 1;
743 status = 0;
744 }
745
746 /* Does this device support configuring which video device to POST? */
747 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
748 video->flags.post = 1;
749 status = 0;
750 }
751
752 return status;
753 }
754
755 /* --------------------------------------------------------------------------
756 FS Interface (/proc)
757 -------------------------------------------------------------------------- */
758
759 static struct proc_dir_entry *acpi_video_dir;
760
761 /* video devices */
762
763 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
764 {
765 struct acpi_video_device *dev = seq->private;
766
767
768 if (!dev)
769 goto end;
770
771 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
772 seq_printf(seq, "type: ");
773 if (dev->flags.crt)
774 seq_printf(seq, "CRT\n");
775 else if (dev->flags.lcd)
776 seq_printf(seq, "LCD\n");
777 else if (dev->flags.tvout)
778 seq_printf(seq, "TVOUT\n");
779 else if (dev->flags.dvi)
780 seq_printf(seq, "DVI\n");
781 else
782 seq_printf(seq, "UNKNOWN\n");
783
784 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
785
786 end:
787 return 0;
788 }
789
790 static int
791 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
792 {
793 return single_open(file, acpi_video_device_info_seq_show,
794 PDE(inode)->data);
795 }
796
797 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
798 {
799 int status;
800 struct acpi_video_device *dev = seq->private;
801 unsigned long state;
802
803
804 if (!dev)
805 goto end;
806
807 status = acpi_video_device_get_state(dev, &state);
808 seq_printf(seq, "state: ");
809 if (ACPI_SUCCESS(status))
810 seq_printf(seq, "0x%02lx\n", state);
811 else
812 seq_printf(seq, "<not supported>\n");
813
814 status = acpi_video_device_query(dev, &state);
815 seq_printf(seq, "query: ");
816 if (ACPI_SUCCESS(status))
817 seq_printf(seq, "0x%02lx\n", state);
818 else
819 seq_printf(seq, "<not supported>\n");
820
821 end:
822 return 0;
823 }
824
825 static int
826 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
827 {
828 return single_open(file, acpi_video_device_state_seq_show,
829 PDE(inode)->data);
830 }
831
832 static ssize_t
833 acpi_video_device_write_state(struct file *file,
834 const char __user * buffer,
835 size_t count, loff_t * data)
836 {
837 int status;
838 struct seq_file *m = file->private_data;
839 struct acpi_video_device *dev = m->private;
840 char str[12] = { 0 };
841 u32 state = 0;
842
843
844 if (!dev || count + 1 > sizeof str)
845 return -EINVAL;
846
847 if (copy_from_user(str, buffer, count))
848 return -EFAULT;
849
850 str[count] = 0;
851 state = simple_strtoul(str, NULL, 0);
852 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
853
854 status = acpi_video_device_set_state(dev, state);
855
856 if (status)
857 return -EFAULT;
858
859 return count;
860 }
861
862 static int
863 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
864 {
865 struct acpi_video_device *dev = seq->private;
866 int i;
867
868
869 if (!dev || !dev->brightness) {
870 seq_printf(seq, "<not supported>\n");
871 return 0;
872 }
873
874 seq_printf(seq, "levels: ");
875 for (i = 0; i < dev->brightness->count; i++)
876 seq_printf(seq, " %d", dev->brightness->levels[i]);
877 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
878
879 return 0;
880 }
881
882 static int
883 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
884 {
885 return single_open(file, acpi_video_device_brightness_seq_show,
886 PDE(inode)->data);
887 }
888
889 static ssize_t
890 acpi_video_device_write_brightness(struct file *file,
891 const char __user * buffer,
892 size_t count, loff_t * data)
893 {
894 struct seq_file *m = file->private_data;
895 struct acpi_video_device *dev = m->private;
896 char str[4] = { 0 };
897 unsigned int level = 0;
898 int i;
899
900
901 if (!dev || !dev->brightness || count + 1 > sizeof str)
902 return -EINVAL;
903
904 if (copy_from_user(str, buffer, count))
905 return -EFAULT;
906
907 str[count] = 0;
908 level = simple_strtoul(str, NULL, 0);
909
910 if (level > 100)
911 return -EFAULT;
912
913 /* validate through the list of available levels */
914 for (i = 0; i < dev->brightness->count; i++)
915 if (level == dev->brightness->levels[i]) {
916 if (ACPI_SUCCESS
917 (acpi_video_device_lcd_set_level(dev, level)))
918 dev->brightness->curr = level;
919 break;
920 }
921
922 return count;
923 }
924
925 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
926 {
927 struct acpi_video_device *dev = seq->private;
928 int status;
929 int i;
930 union acpi_object *edid = NULL;
931
932
933 if (!dev)
934 goto out;
935
936 status = acpi_video_device_EDID(dev, &edid, 128);
937 if (ACPI_FAILURE(status)) {
938 status = acpi_video_device_EDID(dev, &edid, 256);
939 }
940
941 if (ACPI_FAILURE(status)) {
942 goto out;
943 }
944
945 if (edid && edid->type == ACPI_TYPE_BUFFER) {
946 for (i = 0; i < edid->buffer.length; i++)
947 seq_putc(seq, edid->buffer.pointer[i]);
948 }
949
950 out:
951 if (!edid)
952 seq_printf(seq, "<not supported>\n");
953 else
954 kfree(edid);
955
956 return 0;
957 }
958
959 static int
960 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
961 {
962 return single_open(file, acpi_video_device_EDID_seq_show,
963 PDE(inode)->data);
964 }
965
966 static int acpi_video_device_add_fs(struct acpi_device *device)
967 {
968 struct proc_dir_entry *entry = NULL;
969 struct acpi_video_device *vid_dev;
970
971
972 if (!device)
973 return -ENODEV;
974
975 vid_dev = acpi_driver_data(device);
976 if (!vid_dev)
977 return -ENODEV;
978
979 if (!acpi_device_dir(device)) {
980 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
981 vid_dev->video->dir);
982 if (!acpi_device_dir(device))
983 return -ENODEV;
984 acpi_device_dir(device)->owner = THIS_MODULE;
985 }
986
987 /* 'info' [R] */
988 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
989 if (!entry)
990 return -ENODEV;
991 else {
992 entry->proc_fops = &acpi_video_device_info_fops;
993 entry->data = acpi_driver_data(device);
994 entry->owner = THIS_MODULE;
995 }
996
997 /* 'state' [R/W] */
998 entry =
999 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
1000 acpi_device_dir(device));
1001 if (!entry)
1002 return -ENODEV;
1003 else {
1004 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1005 entry->proc_fops = &acpi_video_device_state_fops;
1006 entry->data = acpi_driver_data(device);
1007 entry->owner = THIS_MODULE;
1008 }
1009
1010 /* 'brightness' [R/W] */
1011 entry =
1012 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1013 acpi_device_dir(device));
1014 if (!entry)
1015 return -ENODEV;
1016 else {
1017 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
1018 entry->proc_fops = &acpi_video_device_brightness_fops;
1019 entry->data = acpi_driver_data(device);
1020 entry->owner = THIS_MODULE;
1021 }
1022
1023 /* 'EDID' [R] */
1024 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
1025 if (!entry)
1026 return -ENODEV;
1027 else {
1028 entry->proc_fops = &acpi_video_device_EDID_fops;
1029 entry->data = acpi_driver_data(device);
1030 entry->owner = THIS_MODULE;
1031 }
1032
1033 return 0;
1034 }
1035
1036 static int acpi_video_device_remove_fs(struct acpi_device *device)
1037 {
1038 struct acpi_video_device *vid_dev;
1039
1040 vid_dev = acpi_driver_data(device);
1041 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1042 return -ENODEV;
1043
1044 if (acpi_device_dir(device)) {
1045 remove_proc_entry("info", acpi_device_dir(device));
1046 remove_proc_entry("state", acpi_device_dir(device));
1047 remove_proc_entry("brightness", acpi_device_dir(device));
1048 remove_proc_entry("EDID", acpi_device_dir(device));
1049 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1050 acpi_device_dir(device) = NULL;
1051 }
1052
1053 return 0;
1054 }
1055
1056 /* video bus */
1057 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1058 {
1059 struct acpi_video_bus *video = seq->private;
1060
1061
1062 if (!video)
1063 goto end;
1064
1065 seq_printf(seq, "Switching heads: %s\n",
1066 video->flags.multihead ? "yes" : "no");
1067 seq_printf(seq, "Video ROM: %s\n",
1068 video->flags.rom ? "yes" : "no");
1069 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1070 video->flags.post ? "yes" : "no");
1071
1072 end:
1073 return 0;
1074 }
1075
1076 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1077 {
1078 return single_open(file, acpi_video_bus_info_seq_show,
1079 PDE(inode)->data);
1080 }
1081
1082 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1083 {
1084 struct acpi_video_bus *video = seq->private;
1085
1086
1087 if (!video)
1088 goto end;
1089
1090 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1091 seq_printf(seq, "<TODO>\n");
1092
1093 end:
1094 return 0;
1095 }
1096
1097 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1098 {
1099 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1100 }
1101
1102 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1103 {
1104 struct acpi_video_bus *video = seq->private;
1105 unsigned long options;
1106 int status;
1107
1108
1109 if (!video)
1110 goto end;
1111
1112 status = acpi_video_bus_POST_options(video, &options);
1113 if (ACPI_SUCCESS(status)) {
1114 if (!(options & 1)) {
1115 printk(KERN_WARNING PREFIX
1116 "The motherboard VGA device is not listed as a possible POST device.\n");
1117 printk(KERN_WARNING PREFIX
1118 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1119 }
1120 printk("%lx\n", options);
1121 seq_printf(seq, "can POST: <integrated video>");
1122 if (options & 2)
1123 seq_printf(seq, " <PCI video>");
1124 if (options & 4)
1125 seq_printf(seq, " <AGP video>");
1126 seq_putc(seq, '\n');
1127 } else
1128 seq_printf(seq, "<not supported>\n");
1129 end:
1130 return 0;
1131 }
1132
1133 static int
1134 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1135 {
1136 return single_open(file, acpi_video_bus_POST_info_seq_show,
1137 PDE(inode)->data);
1138 }
1139
1140 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1141 {
1142 struct acpi_video_bus *video = seq->private;
1143 int status;
1144 unsigned long id;
1145
1146
1147 if (!video)
1148 goto end;
1149
1150 status = acpi_video_bus_get_POST(video, &id);
1151 if (!ACPI_SUCCESS(status)) {
1152 seq_printf(seq, "<not supported>\n");
1153 goto end;
1154 }
1155 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1156
1157 end:
1158 return 0;
1159 }
1160
1161 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1162 {
1163 struct acpi_video_bus *video = seq->private;
1164
1165
1166 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1167
1168 return 0;
1169 }
1170
1171 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1172 {
1173 return single_open(file, acpi_video_bus_POST_seq_show,
1174 PDE(inode)->data);
1175 }
1176
1177 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1178 {
1179 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1180 }
1181
1182 static ssize_t
1183 acpi_video_bus_write_POST(struct file *file,
1184 const char __user * buffer,
1185 size_t count, loff_t * data)
1186 {
1187 int status;
1188 struct seq_file *m = file->private_data;
1189 struct acpi_video_bus *video = m->private;
1190 char str[12] = { 0 };
1191 unsigned long opt, options;
1192
1193
1194 if (!video || count + 1 > sizeof str)
1195 return -EINVAL;
1196
1197 status = acpi_video_bus_POST_options(video, &options);
1198 if (!ACPI_SUCCESS(status))
1199 return -EINVAL;
1200
1201 if (copy_from_user(str, buffer, count))
1202 return -EFAULT;
1203
1204 str[count] = 0;
1205 opt = strtoul(str, NULL, 0);
1206 if (opt > 3)
1207 return -EFAULT;
1208
1209 /* just in case an OEM 'forgot' the motherboard... */
1210 options |= 1;
1211
1212 if (options & (1ul << opt)) {
1213 status = acpi_video_bus_set_POST(video, opt);
1214 if (!ACPI_SUCCESS(status))
1215 return -EFAULT;
1216
1217 }
1218
1219 return count;
1220 }
1221
1222 static ssize_t
1223 acpi_video_bus_write_DOS(struct file *file,
1224 const char __user * buffer,
1225 size_t count, loff_t * data)
1226 {
1227 int status;
1228 struct seq_file *m = file->private_data;
1229 struct acpi_video_bus *video = m->private;
1230 char str[12] = { 0 };
1231 unsigned long opt;
1232
1233
1234 if (!video || count + 1 > sizeof str)
1235 return -EINVAL;
1236
1237 if (copy_from_user(str, buffer, count))
1238 return -EFAULT;
1239
1240 str[count] = 0;
1241 opt = strtoul(str, NULL, 0);
1242 if (opt > 7)
1243 return -EFAULT;
1244
1245 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1246
1247 if (!ACPI_SUCCESS(status))
1248 return -EFAULT;
1249
1250 return count;
1251 }
1252
1253 static int acpi_video_bus_add_fs(struct acpi_device *device)
1254 {
1255 struct proc_dir_entry *entry = NULL;
1256 struct acpi_video_bus *video;
1257
1258
1259 video = acpi_driver_data(device);
1260
1261 if (!acpi_device_dir(device)) {
1262 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1263 acpi_video_dir);
1264 if (!acpi_device_dir(device))
1265 return -ENODEV;
1266 video->dir = acpi_device_dir(device);
1267 acpi_device_dir(device)->owner = THIS_MODULE;
1268 }
1269
1270 /* 'info' [R] */
1271 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1272 if (!entry)
1273 return -ENODEV;
1274 else {
1275 entry->proc_fops = &acpi_video_bus_info_fops;
1276 entry->data = acpi_driver_data(device);
1277 entry->owner = THIS_MODULE;
1278 }
1279
1280 /* 'ROM' [R] */
1281 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1282 if (!entry)
1283 return -ENODEV;
1284 else {
1285 entry->proc_fops = &acpi_video_bus_ROM_fops;
1286 entry->data = acpi_driver_data(device);
1287 entry->owner = THIS_MODULE;
1288 }
1289
1290 /* 'POST_info' [R] */
1291 entry =
1292 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1293 if (!entry)
1294 return -ENODEV;
1295 else {
1296 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1297 entry->data = acpi_driver_data(device);
1298 entry->owner = THIS_MODULE;
1299 }
1300
1301 /* 'POST' [R/W] */
1302 entry =
1303 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1304 acpi_device_dir(device));
1305 if (!entry)
1306 return -ENODEV;
1307 else {
1308 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1309 entry->proc_fops = &acpi_video_bus_POST_fops;
1310 entry->data = acpi_driver_data(device);
1311 entry->owner = THIS_MODULE;
1312 }
1313
1314 /* 'DOS' [R/W] */
1315 entry =
1316 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1317 acpi_device_dir(device));
1318 if (!entry)
1319 return -ENODEV;
1320 else {
1321 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1322 entry->proc_fops = &acpi_video_bus_DOS_fops;
1323 entry->data = acpi_driver_data(device);
1324 entry->owner = THIS_MODULE;
1325 }
1326
1327 return 0;
1328 }
1329
1330 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1331 {
1332 struct acpi_video_bus *video;
1333
1334
1335 video = acpi_driver_data(device);
1336
1337 if (acpi_device_dir(device)) {
1338 remove_proc_entry("info", acpi_device_dir(device));
1339 remove_proc_entry("ROM", acpi_device_dir(device));
1340 remove_proc_entry("POST_info", acpi_device_dir(device));
1341 remove_proc_entry("POST", acpi_device_dir(device));
1342 remove_proc_entry("DOS", acpi_device_dir(device));
1343 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1344 acpi_device_dir(device) = NULL;
1345 }
1346
1347 return 0;
1348 }
1349
1350 /* --------------------------------------------------------------------------
1351 Driver Interface
1352 -------------------------------------------------------------------------- */
1353
1354 /* device interface */
1355 static struct acpi_video_device_attrib*
1356 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1357 {
1358 int count;
1359
1360 for(count = 0; count < video->attached_count; count++)
1361 if((video->attached_array[count].value.int_val & 0xffff) == device_id)
1362 return &(video->attached_array[count].value.attrib);
1363 return NULL;
1364 }
1365
1366 static int
1367 acpi_video_bus_get_one_device(struct acpi_device *device,
1368 struct acpi_video_bus *video)
1369 {
1370 unsigned long device_id;
1371 int status;
1372 struct acpi_video_device *data;
1373 struct acpi_video_device_attrib* attribute;
1374
1375 if (!device || !video)
1376 return -EINVAL;
1377
1378 status =
1379 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1380 if (ACPI_SUCCESS(status)) {
1381
1382 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1383 if (!data)
1384 return -ENOMEM;
1385
1386 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1387 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1388 acpi_driver_data(device) = data;
1389
1390 data->device_id = device_id;
1391 data->video = video;
1392 data->dev = device;
1393
1394 attribute = acpi_video_get_device_attr(video, device_id);
1395
1396 if((attribute != NULL) && attribute->device_id_scheme) {
1397 switch (attribute->display_type) {
1398 case ACPI_VIDEO_DISPLAY_CRT:
1399 data->flags.crt = 1;
1400 break;
1401 case ACPI_VIDEO_DISPLAY_TV:
1402 data->flags.tvout = 1;
1403 break;
1404 case ACPI_VIDEO_DISPLAY_DVI:
1405 data->flags.dvi = 1;
1406 break;
1407 case ACPI_VIDEO_DISPLAY_LCD:
1408 data->flags.lcd = 1;
1409 break;
1410 default:
1411 data->flags.unknown = 1;
1412 break;
1413 }
1414 if(attribute->bios_can_detect)
1415 data->flags.bios = 1;
1416 } else
1417 data->flags.unknown = 1;
1418
1419 acpi_video_device_bind(video, data);
1420 acpi_video_device_find_cap(data);
1421
1422 status = acpi_install_notify_handler(device->handle,
1423 ACPI_DEVICE_NOTIFY,
1424 acpi_video_device_notify,
1425 data);
1426 if (ACPI_FAILURE(status)) {
1427 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1428 "Error installing notify handler\n"));
1429 if(data->brightness)
1430 kfree(data->brightness->levels);
1431 kfree(data->brightness);
1432 kfree(data);
1433 return -ENODEV;
1434 }
1435
1436 down(&video->sem);
1437 list_add_tail(&data->entry, &video->video_device_list);
1438 up(&video->sem);
1439
1440 acpi_video_device_add_fs(device);
1441
1442 return 0;
1443 }
1444
1445 return -ENOENT;
1446 }
1447
1448 /*
1449 * Arg:
1450 * video : video bus device
1451 *
1452 * Return:
1453 * none
1454 *
1455 * Enumerate the video device list of the video bus,
1456 * bind the ids with the corresponding video devices
1457 * under the video bus.
1458 */
1459
1460 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1461 {
1462 struct list_head *node, *next;
1463 list_for_each_safe(node, next, &video->video_device_list) {
1464 struct acpi_video_device *dev =
1465 container_of(node, struct acpi_video_device, entry);
1466 acpi_video_device_bind(video, dev);
1467 }
1468 }
1469
1470 /*
1471 * Arg:
1472 * video : video bus device
1473 * device : video output device under the video
1474 * bus
1475 *
1476 * Return:
1477 * none
1478 *
1479 * Bind the ids with the corresponding video devices
1480 * under the video bus.
1481 */
1482
1483 static void
1484 acpi_video_device_bind(struct acpi_video_bus *video,
1485 struct acpi_video_device *device)
1486 {
1487 int i;
1488
1489 #define IDS_VAL(i) video->attached_array[i].value.int_val
1490 #define IDS_BIND(i) video->attached_array[i].bind_info
1491
1492 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1493 i < video->attached_count; i++) {
1494 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1495 IDS_BIND(i) = device;
1496 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1497 }
1498 }
1499 #undef IDS_VAL
1500 #undef IDS_BIND
1501 }
1502
1503 /*
1504 * Arg:
1505 * video : video bus device
1506 *
1507 * Return:
1508 * < 0 : error
1509 *
1510 * Call _DOD to enumerate all devices attached to display adapter
1511 *
1512 */
1513
1514 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1515 {
1516 int status;
1517 int count;
1518 int i;
1519 struct acpi_video_enumerated_device *active_device_list;
1520 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1521 union acpi_object *dod = NULL;
1522 union acpi_object *obj;
1523
1524 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1525 if (!ACPI_SUCCESS(status)) {
1526 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1527 return status;
1528 }
1529
1530 dod = buffer.pointer;
1531 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1532 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1533 status = -EFAULT;
1534 goto out;
1535 }
1536
1537 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1538 dod->package.count));
1539
1540 active_device_list = kmalloc((1 +
1541 dod->package.count) *
1542 sizeof(struct
1543 acpi_video_enumerated_device),
1544 GFP_KERNEL);
1545
1546 if (!active_device_list) {
1547 status = -ENOMEM;
1548 goto out;
1549 }
1550
1551 count = 0;
1552 for (i = 0; i < dod->package.count; i++) {
1553 obj = &dod->package.elements[i];
1554
1555 if (obj->type != ACPI_TYPE_INTEGER) {
1556 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1557 active_device_list[i].value.int_val =
1558 ACPI_VIDEO_HEAD_INVALID;
1559 }
1560 active_device_list[i].value.int_val = obj->integer.value;
1561 active_device_list[i].bind_info = NULL;
1562 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1563 (int)obj->integer.value));
1564 count++;
1565 }
1566 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1567
1568 kfree(video->attached_array);
1569
1570 video->attached_array = active_device_list;
1571 video->attached_count = count;
1572 out:
1573 kfree(buffer.pointer);
1574 return status;
1575 }
1576
1577 /*
1578 * Arg:
1579 * video : video bus device
1580 * event : notify event
1581 *
1582 * Return:
1583 * < 0 : error
1584 *
1585 * 1. Find out the current active output device.
1586 * 2. Identify the next output device to switch to.
1587 * 3. call _DSS to do actual switch.
1588 */
1589
1590 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1591 {
1592 struct list_head *node, *next;
1593 struct acpi_video_device *dev = NULL;
1594 struct acpi_video_device *dev_next = NULL;
1595 struct acpi_video_device *dev_prev = NULL;
1596 unsigned long state;
1597 int status = 0;
1598
1599
1600 list_for_each_safe(node, next, &video->video_device_list) {
1601 dev = container_of(node, struct acpi_video_device, entry);
1602 status = acpi_video_device_get_state(dev, &state);
1603 if (state & 0x2) {
1604 dev_next =
1605 container_of(node->next, struct acpi_video_device,
1606 entry);
1607 dev_prev =
1608 container_of(node->prev, struct acpi_video_device,
1609 entry);
1610 goto out;
1611 }
1612 }
1613 dev_next = container_of(node->next, struct acpi_video_device, entry);
1614 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1615 out:
1616 switch (event) {
1617 case ACPI_VIDEO_NOTIFY_CYCLE:
1618 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1619 acpi_video_device_set_state(dev, 0);
1620 acpi_video_device_set_state(dev_next, 0x80000001);
1621 break;
1622 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1623 acpi_video_device_set_state(dev, 0);
1624 acpi_video_device_set_state(dev_prev, 0x80000001);
1625 default:
1626 break;
1627 }
1628
1629 return status;
1630 }
1631
1632 static int
1633 acpi_video_get_next_level(struct acpi_video_device *device,
1634 u32 level_current, u32 event)
1635 {
1636 int min, max, min_above, max_below, i, l;
1637 max = max_below = 0;
1638 min = min_above = 255;
1639 for (i = 0; i < device->brightness->count; i++) {
1640 l = device->brightness->levels[i];
1641 if (l < min)
1642 min = l;
1643 if (l > max)
1644 max = l;
1645 if (l < min_above && l > level_current)
1646 min_above = l;
1647 if (l > max_below && l < level_current)
1648 max_below = l;
1649 }
1650
1651 switch (event) {
1652 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1653 return (level_current < max) ? min_above : min;
1654 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1655 return (level_current < max) ? min_above : max;
1656 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1657 return (level_current > min) ? max_below : min;
1658 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1659 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1660 return 0;
1661 default:
1662 return level_current;
1663 }
1664 }
1665
1666 static void
1667 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1668 {
1669 unsigned long level_current, level_next;
1670 acpi_video_device_lcd_get_level_current(device, &level_current);
1671 level_next = acpi_video_get_next_level(device, level_current, event);
1672 acpi_video_device_lcd_set_level(device, level_next);
1673 }
1674
1675 static int
1676 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1677 struct acpi_device *device)
1678 {
1679 int status = 0;
1680 struct list_head *node, *next;
1681
1682
1683 acpi_video_device_enumerate(video);
1684
1685 list_for_each_safe(node, next, &device->children) {
1686 struct acpi_device *dev =
1687 list_entry(node, struct acpi_device, node);
1688
1689 if (!dev)
1690 continue;
1691
1692 status = acpi_video_bus_get_one_device(dev, video);
1693 if (ACPI_FAILURE(status)) {
1694 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1695 continue;
1696 }
1697
1698 }
1699 return status;
1700 }
1701
1702 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1703 {
1704 acpi_status status;
1705 struct acpi_video_bus *video;
1706
1707
1708 if (!device || !device->video)
1709 return -ENOENT;
1710
1711 video = device->video;
1712
1713 down(&video->sem);
1714 list_del(&device->entry);
1715 up(&video->sem);
1716 acpi_video_device_remove_fs(device->dev);
1717
1718 status = acpi_remove_notify_handler(device->dev->handle,
1719 ACPI_DEVICE_NOTIFY,
1720 acpi_video_device_notify);
1721 backlight_device_unregister(device->backlight);
1722 video_output_unregister(device->output_dev);
1723 return 0;
1724 }
1725
1726 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1727 {
1728 int status;
1729 struct list_head *node, *next;
1730
1731
1732 list_for_each_safe(node, next, &video->video_device_list) {
1733 struct acpi_video_device *data =
1734 list_entry(node, struct acpi_video_device, entry);
1735 if (!data)
1736 continue;
1737
1738 status = acpi_video_bus_put_one_device(data);
1739 if (ACPI_FAILURE(status))
1740 printk(KERN_WARNING PREFIX
1741 "hhuuhhuu bug in acpi video driver.\n");
1742
1743 if (data->brightness)
1744 kfree(data->brightness->levels);
1745 kfree(data->brightness);
1746 kfree(data);
1747 }
1748
1749 return 0;
1750 }
1751
1752 /* acpi_video interface */
1753
1754 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1755 {
1756 return acpi_video_bus_DOS(video, 0, 0);
1757 }
1758
1759 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1760 {
1761 return acpi_video_bus_DOS(video, 0, 1);
1762 }
1763
1764 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1765 {
1766 struct acpi_video_bus *video = data;
1767 struct acpi_device *device = NULL;
1768 struct input_dev *input;
1769 int keycode;
1770
1771
1772 printk("video bus notify\n");
1773
1774 if (!video)
1775 return;
1776
1777 device = video->device;
1778 input = video->input;
1779
1780 switch (event) {
1781 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1782 * most likely via hotkey. */
1783 acpi_bus_generate_proc_event(device, event, 0);
1784 keycode = KEY_SWITCHVIDEOMODE;
1785 break;
1786
1787 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1788 * connector. */
1789 acpi_video_device_enumerate(video);
1790 acpi_video_device_rebind(video);
1791 acpi_video_switch_output(video, event);
1792 acpi_bus_generate_proc_event(device, event, 0);
1793 keycode = KEY_SWITCHVIDEOMODE;
1794 break;
1795
1796 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1797 acpi_video_switch_output(video, event);
1798 acpi_bus_generate_proc_event(device, event, 0);
1799 keycode = KEY_SWITCHVIDEOMODE;
1800 break;
1801 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1802 acpi_video_switch_output(video, event);
1803 acpi_bus_generate_proc_event(device, event, 0);
1804 keycode = KEY_VIDEO_NEXT;
1805 break;
1806 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1807 acpi_video_switch_output(video, event);
1808 acpi_bus_generate_proc_event(device, event, 0);
1809 keycode = KEY_VIDEO_PREV;
1810 break;
1811
1812 default:
1813 keycode = KEY_UNKNOWN;
1814 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1815 "Unsupported event [0x%x]\n", event));
1816 break;
1817 }
1818
1819 input_report_key(input, keycode, 1);
1820 input_sync(input);
1821 input_report_key(input, keycode, 0);
1822 input_sync(input);
1823
1824 return;
1825 }
1826
1827 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1828 {
1829 struct acpi_video_device *video_device = data;
1830 struct acpi_device *device = NULL;
1831 struct acpi_video_bus *bus;
1832 struct input_dev *input;
1833 int keycode;
1834
1835 if (!video_device)
1836 return;
1837
1838 device = video_device->dev;
1839 bus = video_device->video;
1840 input = bus->input;
1841
1842 switch (event) {
1843 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1844 acpi_video_switch_brightness(video_device, event);
1845 acpi_bus_generate_proc_event(device, event, 0);
1846 keycode = KEY_BRIGHTNESS_CYCLE;
1847 break;
1848 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1849 acpi_video_switch_brightness(video_device, event);
1850 acpi_bus_generate_proc_event(device, event, 0);
1851 keycode = KEY_BRIGHTNESSUP;
1852 break;
1853 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1854 acpi_video_switch_brightness(video_device, event);
1855 acpi_bus_generate_proc_event(device, event, 0);
1856 keycode = KEY_BRIGHTNESSDOWN;
1857 break;
1858 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1859 acpi_video_switch_brightness(video_device, event);
1860 acpi_bus_generate_proc_event(device, event, 0);
1861 keycode = KEY_BRIGHTNESS_ZERO;
1862 break;
1863 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1864 acpi_video_switch_brightness(video_device, event);
1865 acpi_bus_generate_proc_event(device, event, 0);
1866 keycode = KEY_DISPLAY_OFF;
1867 break;
1868 default:
1869 keycode = KEY_UNKNOWN;
1870 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1871 "Unsupported event [0x%x]\n", event));
1872 break;
1873 }
1874
1875 input_report_key(input, keycode, 1);
1876 input_sync(input);
1877 input_report_key(input, keycode, 0);
1878 input_sync(input);
1879
1880 return;
1881 }
1882
1883 static int instance;
1884 static int acpi_video_bus_add(struct acpi_device *device)
1885 {
1886 int result = 0;
1887 acpi_status status = 0;
1888 struct acpi_video_bus *video = NULL;
1889 struct input_dev *input;
1890
1891
1892 if (!device)
1893 return -EINVAL;
1894
1895 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1896 if (!video)
1897 return -ENOMEM;
1898
1899 /* a hack to fix the duplicate name "VID" problem on T61 */
1900 if (!strcmp(device->pnp.bus_id, "VID")) {
1901 if (instance)
1902 device->pnp.bus_id[3] = '0' + instance;
1903 instance ++;
1904 }
1905
1906 video->device = device;
1907 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1908 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1909 acpi_driver_data(device) = video;
1910
1911 acpi_video_bus_find_cap(video);
1912 result = acpi_video_bus_check(video);
1913 if (result)
1914 goto end;
1915
1916 result = acpi_video_bus_add_fs(device);
1917 if (result)
1918 goto end;
1919
1920 init_MUTEX(&video->sem);
1921 INIT_LIST_HEAD(&video->video_device_list);
1922
1923 acpi_video_bus_get_devices(video, device);
1924 acpi_video_bus_start_devices(video);
1925
1926 status = acpi_install_notify_handler(device->handle,
1927 ACPI_DEVICE_NOTIFY,
1928 acpi_video_bus_notify, video);
1929 if (ACPI_FAILURE(status)) {
1930 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1931 "Error installing notify handler\n"));
1932 acpi_video_bus_stop_devices(video);
1933 acpi_video_bus_put_devices(video);
1934 kfree(video->attached_array);
1935 acpi_video_bus_remove_fs(device);
1936 result = -ENODEV;
1937 goto end;
1938 }
1939
1940
1941 video->input = input = input_allocate_device();
1942
1943 snprintf(video->phys, sizeof(video->phys),
1944 "%s/video/input0", acpi_device_hid(video->device));
1945
1946 input->name = acpi_device_name(video->device);
1947 input->phys = video->phys;
1948 input->id.bustype = BUS_HOST;
1949 input->id.product = 0x06;
1950 input->evbit[0] = BIT(EV_KEY);
1951 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
1952 set_bit(KEY_VIDEO_NEXT, input->keybit);
1953 set_bit(KEY_VIDEO_PREV, input->keybit);
1954 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
1955 set_bit(KEY_BRIGHTNESSUP, input->keybit);
1956 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
1957 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
1958 set_bit(KEY_DISPLAY_OFF, input->keybit);
1959 set_bit(KEY_UNKNOWN, input->keybit);
1960 result = input_register_device(input);
1961 if (result) {
1962 acpi_remove_notify_handler(video->device->handle,
1963 ACPI_DEVICE_NOTIFY,
1964 acpi_video_bus_notify);
1965 acpi_video_bus_stop_devices(video);
1966 acpi_video_bus_put_devices(video);
1967 kfree(video->attached_array);
1968 acpi_video_bus_remove_fs(device);
1969 goto end;
1970 }
1971
1972
1973 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1974 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1975 video->flags.multihead ? "yes" : "no",
1976 video->flags.rom ? "yes" : "no",
1977 video->flags.post ? "yes" : "no");
1978
1979 end:
1980 if (result)
1981 kfree(video);
1982
1983 return result;
1984 }
1985
1986 static int acpi_video_bus_remove(struct acpi_device *device, int type)
1987 {
1988 acpi_status status = 0;
1989 struct acpi_video_bus *video = NULL;
1990
1991
1992 if (!device || !acpi_driver_data(device))
1993 return -EINVAL;
1994
1995 video = acpi_driver_data(device);
1996
1997 acpi_video_bus_stop_devices(video);
1998
1999 status = acpi_remove_notify_handler(video->device->handle,
2000 ACPI_DEVICE_NOTIFY,
2001 acpi_video_bus_notify);
2002
2003 acpi_video_bus_put_devices(video);
2004 acpi_video_bus_remove_fs(device);
2005
2006 input_unregister_device(video->input);
2007 kfree(video->attached_array);
2008 kfree(video);
2009
2010 return 0;
2011 }
2012
2013 static int __init acpi_video_init(void)
2014 {
2015 int result = 0;
2016
2017
2018 /*
2019 acpi_dbg_level = 0xFFFFFFFF;
2020 acpi_dbg_layer = 0x08000000;
2021 */
2022
2023 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2024 if (!acpi_video_dir)
2025 return -ENODEV;
2026 acpi_video_dir->owner = THIS_MODULE;
2027
2028 result = acpi_bus_register_driver(&acpi_video_bus);
2029 if (result < 0) {
2030 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2031 return -ENODEV;
2032 }
2033
2034 return 0;
2035 }
2036
2037 static void __exit acpi_video_exit(void)
2038 {
2039
2040 acpi_bus_unregister_driver(&acpi_video_bus);
2041
2042 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2043
2044 return;
2045 }
2046
2047 module_init(acpi_video_init);
2048 module_exit(acpi_video_exit);
Support for the Chinese Samsung S3C2440 based development boards