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