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1da177e4
LT		 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 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/types.h>
30#include <linux/list.h>
31#include <linux/proc_fs.h>
32#include <linux/seq_file.h>
33
34#include <asm/uaccess.h>
35
36#include <acpi/acpi_bus.h>
37#include <acpi/acpi_drivers.h>
38
39#define ACPI_VIDEO_COMPONENT 0x08000000
40#define ACPI_VIDEO_CLASS "video"
41#define ACPI_VIDEO_DRIVER_NAME "ACPI Video Driver"
42#define ACPI_VIDEO_BUS_NAME "Video Bus"
43#define ACPI_VIDEO_DEVICE_NAME "Video Device"
44#define ACPI_VIDEO_NOTIFY_SWITCH 0x80
45#define ACPI_VIDEO_NOTIFY_PROBE 0x81
46#define ACPI_VIDEO_NOTIFY_CYCLE 0x82
47#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
48#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
49
50#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x82
51#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x83
52#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x84
53#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x85
54#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x86
55
56
57#define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
58#define ACPI_VIDEO_HEAD_END (~0u)
59
60
61#define _COMPONENT ACPI_VIDEO_COMPONENT
62ACPI_MODULE_NAME ("acpi_video")
63
64MODULE_AUTHOR("Bruno Ducrot");
65MODULE_DESCRIPTION(ACPI_VIDEO_DRIVER_NAME);
66MODULE_LICENSE("GPL");
67
68static int acpi_video_bus_add (struct acpi_device *device);
69static int acpi_video_bus_remove (struct acpi_device *device, int type);
70static int acpi_video_bus_match (struct acpi_device *device, struct acpi_driver *driver);
71
72static struct acpi_driver acpi_video_bus = {
73 .name = ACPI_VIDEO_DRIVER_NAME,
74 .class = ACPI_VIDEO_CLASS,
75 .ops = {
76 .add = acpi_video_bus_add,
77 .remove = acpi_video_bus_remove,
78 .match = acpi_video_bus_match,
79 },
80};
81
82struct acpi_video_bus_flags {
83 u8 multihead:1; /* can switch video heads */
84 u8 rom:1; /* can retrieve a video rom */
85 u8 post:1; /* can configure the head to */
86 u8 reserved:5;
87};
88
89struct acpi_video_bus_cap {
90 u8 _DOS:1; /*Enable/Disable output switching*/
91 u8 _DOD:1; /*Enumerate all devices attached to display adapter*/
92 u8 _ROM:1; /*Get ROM Data*/
93 u8 _GPD:1; /*Get POST Device*/
94 u8 _SPD:1; /*Set POST Device*/
95 u8 _VPO:1; /*Video POST Options*/
96 u8 reserved:2;
97};
98
99struct acpi_video_device_attrib{
100 u32 display_index:4; /* A zero-based instance of the Display*/
101 u32 display_port_attachment:4; /*This field differenates displays type*/
102 u32 display_type:4; /*Describe the specific type in use*/
103 u32 vendor_specific:4; /*Chipset Vendor Specifi*/
104 u32 bios_can_detect:1; /*BIOS can detect the device*/
105 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
106 the VGA device.*/
107 u32 pipe_id:3; /*For VGA multiple-head devices.*/
108 u32 reserved:10; /*Must be 0*/
109 u32 device_id_scheme:1; /*Device ID Scheme*/
110};
111
112struct acpi_video_enumerated_device {
113 union {
114 u32 int_val;
115 struct acpi_video_device_attrib attrib;
116 } value;
117 struct acpi_video_device *bind_info;
118};
119
120struct acpi_video_bus {
121 acpi_handle handle;
122 u8 dos_setting;
123 struct acpi_video_enumerated_device *attached_array;
124 u8 attached_count;
125 struct acpi_video_bus_cap cap;
126 struct acpi_video_bus_flags flags;
127 struct semaphore sem;
128 struct list_head video_device_list;
129 struct proc_dir_entry *dir;
130};
131
132struct acpi_video_device_flags {
133 u8 crt:1;
134 u8 lcd:1;
135 u8 tvout:1;
136 u8 bios:1;
137 u8 unknown:1;
138 u8 reserved:3;
139};
140
141struct acpi_video_device_cap {
142 u8 _ADR:1; /*Return the unique ID */
143 u8 _BCL:1; /*Query list of brightness control levels supported*/
144 u8 _BCM:1; /*Set the brightness level*/
145 u8 _DDC:1; /*Return the EDID for this device*/
146 u8 _DCS:1; /*Return status of output device*/
147 u8 _DGS:1; /*Query graphics state*/
148 u8 _DSS:1; /*Device state set*/
149 u8 _reserved:1;
150};
151
152struct acpi_video_device_brightness {
153 int curr;
154 int count;
155 int *levels;
156};
157
158struct acpi_video_device {
159 acpi_handle handle;
160 unsigned long device_id;
161 struct acpi_video_device_flags flags;
162 struct acpi_video_device_cap cap;
163 struct list_head entry;
164 struct acpi_video_bus *video;
165 struct acpi_device *dev;
166 struct acpi_video_device_brightness *brightness;
167};
168
169
170/* bus */
171static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
172static struct file_operations acpi_video_bus_info_fops = {
173 .open = acpi_video_bus_info_open_fs,
174 .read = seq_read,
175 .llseek = seq_lseek,
176 .release = single_release,
177};
178
179static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
180static struct file_operations acpi_video_bus_ROM_fops = {
181 .open = acpi_video_bus_ROM_open_fs,
182 .read = seq_read,
183 .llseek = seq_lseek,
184 .release = single_release,
185};
186
187static int acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file);
188static struct file_operations acpi_video_bus_POST_info_fops = {
189 .open = acpi_video_bus_POST_info_open_fs,
190 .read = seq_read,
191 .llseek = seq_lseek,
192 .release = single_release,
193};
194
195static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
196static struct file_operations acpi_video_bus_POST_fops = {
197 .open = acpi_video_bus_POST_open_fs,
198 .read = seq_read,
199 .llseek = seq_lseek,
200 .release = single_release,
201};
202
203
204static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
205static struct file_operations acpi_video_bus_DOS_fops = {
206 .open = acpi_video_bus_DOS_open_fs,
207 .read = seq_read,
208 .llseek = seq_lseek,
209 .release = single_release,
210};
211
212/* device */
213static int acpi_video_device_info_open_fs(struct inode *inode, struct file *file);
214static struct file_operations acpi_video_device_info_fops = {
215 .open = acpi_video_device_info_open_fs,
216 .read = seq_read,
217 .llseek = seq_lseek,
218 .release = single_release,
219};
220
221static int acpi_video_device_state_open_fs(struct inode *inode, struct file *file);
222static struct file_operations acpi_video_device_state_fops = {
223 .open = acpi_video_device_state_open_fs,
224 .read = seq_read,
225 .llseek = seq_lseek,
226 .release = single_release,
227};
228
229static int acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file);
230static struct file_operations acpi_video_device_brightness_fops = {
231 .open = acpi_video_device_brightness_open_fs,
232 .read = seq_read,
233 .llseek = seq_lseek,
234 .release = single_release,
235};
236
237static int acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file);
238static struct file_operations acpi_video_device_EDID_fops = {
239 .open = acpi_video_device_EDID_open_fs,
240 .read = seq_read,
241 .llseek = seq_lseek,
242 .release = single_release,
243};
244
245static char device_decode[][30] = {
246 "motherboard VGA device",
247 "PCI VGA device",
248 "AGP VGA device",
249 "UNKNOWN",
250};
251
252static void acpi_video_device_notify ( acpi_handle handle, u32 event, void *data);
253static void acpi_video_device_rebind( struct acpi_video_bus *video);
254static void acpi_video_device_bind( struct acpi_video_bus *video, struct acpi_video_device *device);
255static int acpi_video_device_enumerate(struct acpi_video_bus *video);
256static int acpi_video_switch_output( struct acpi_video_bus *video, int event);
257static int acpi_video_get_next_level( struct acpi_video_device *device, u32 level_current,u32 event);
258static void acpi_video_switch_brightness ( struct acpi_video_device *device, int event);
259
260
261/* --------------------------------------------------------------------------
262 Video Management
263 -------------------------------------------------------------------------- */
264
265/* device */
266
267static int
268acpi_video_device_query (
269 struct acpi_video_device *device,
270 unsigned long *state)
271{
272 int status;
273 ACPI_FUNCTION_TRACE("acpi_video_device_query");
274 status = acpi_evaluate_integer(device->handle, "_DGS", NULL, state);
275
276 return_VALUE(status);
277}
278
279static int
280acpi_video_device_get_state (
281 struct acpi_video_device *device,
282 unsigned long *state)
283{
284 int status;
285
286 ACPI_FUNCTION_TRACE("acpi_video_device_get_state");
287
288 status = acpi_evaluate_integer(device->handle, "_DCS", NULL, state);
289
290 return_VALUE(status);
291}
292
293static int
294acpi_video_device_set_state (
295 struct acpi_video_device *device,
296 int state)
297{
298 int status;
299 union acpi_object arg0 = {ACPI_TYPE_INTEGER};
300 struct acpi_object_list args = {1, &arg0};
301
302 ACPI_FUNCTION_TRACE("acpi_video_device_set_state");
303
304 arg0.integer.value = state;
305 status = acpi_evaluate_integer(device->handle, "_DSS", &args, NULL);
306
307 return_VALUE(status);
308}
309
310static int
311acpi_video_device_lcd_query_levels (
312 struct acpi_video_device *device,
313 union acpi_object **levels)
314{
315 int status;
316 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
317 union acpi_object *obj;
318
319
320 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_query_levels");
321
322 *levels = NULL;
323
324 status = acpi_evaluate_object(device->handle, "_BCL", NULL, &buffer);
325 if (!ACPI_SUCCESS(status))
326 return_VALUE(status);
327 obj = (union acpi_object *) buffer.pointer;
328 if (!obj && (obj->type != ACPI_TYPE_PACKAGE)) {
329 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _BCL data\n"));
330 status = -EFAULT;
331 goto err;
332 }
333
334 *levels = obj;
335
336 return_VALUE(0);
337
338err:
339 if (buffer.pointer)
340 kfree(buffer.pointer);
341
342 return_VALUE(status);
343}
344
345static int
346acpi_video_device_lcd_set_level (
347 struct acpi_video_device *device,
348 int level)
349{
350 int status;
351 union acpi_object arg0 = {ACPI_TYPE_INTEGER};
352 struct acpi_object_list args = {1, &arg0};
353
354 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_set_level");
355
356 arg0.integer.value = level;
357 status = acpi_evaluate_object(device->handle, "_BCM", &args, NULL);
358
359 printk(KERN_DEBUG "set_level status: %x\n", status);
360 return_VALUE(status);
361}
362
363static int
364acpi_video_device_lcd_get_level_current (
365 struct acpi_video_device *device,
366 unsigned long *level)
367{
368 int status;
369 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_get_level_current");
370
371 status = acpi_evaluate_integer(device->handle, "_BQC", NULL, level);
372
373 return_VALUE(status);
374}
375
376static int
377acpi_video_device_EDID (
378 struct acpi_video_device *device,
379 union acpi_object **edid,
380 ssize_t length)
381{
382 int status;
383 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
384 union acpi_object *obj;
385 union acpi_object arg0 = {ACPI_TYPE_INTEGER};
386 struct acpi_object_list args = {1, &arg0};
387
388 ACPI_FUNCTION_TRACE("acpi_video_device_get_EDID");
389
390 *edid = NULL;
391
392 if (!device)
393 return_VALUE(-ENODEV);
394 if (length == 128)
395 arg0.integer.value = 1;
396 else if (length == 256)
397 arg0.integer.value = 2;
398 else
399 return_VALUE(-EINVAL);
400
401 status = acpi_evaluate_object(device->handle, "_DDC", &args, &buffer);
402 if (ACPI_FAILURE(status))
403 return_VALUE(-ENODEV);
404
405 obj = (union acpi_object *) buffer.pointer;
406
407 if (obj && obj->type == ACPI_TYPE_BUFFER)
408 *edid = obj;
409 else {
410 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DDC data\n"));
411 status = -EFAULT;
412 kfree(obj);
413 }
414
415 return_VALUE(status);
416}
417
418
419/* bus */
420
421static int
422acpi_video_bus_set_POST (
423 struct acpi_video_bus *video,
424 unsigned long option)
425{
426 int status;
427 unsigned long tmp;
428 union acpi_object arg0 = {ACPI_TYPE_INTEGER};
429 struct acpi_object_list args = {1, &arg0};
430
431 ACPI_FUNCTION_TRACE("acpi_video_bus_set_POST");
432
433 arg0.integer.value = option;
434
435 status = acpi_evaluate_integer(video->handle, "_SPD", &args, &tmp);
436 if (ACPI_SUCCESS(status))
437 status = tmp ? (-EINVAL):(AE_OK);
438
439 return_VALUE(status);
440}
441
442static int
443acpi_video_bus_get_POST (
444 struct acpi_video_bus *video,
445 unsigned long *id)
446{
447 int status;
448
449 ACPI_FUNCTION_TRACE("acpi_video_bus_get_POST");
450
451 status = acpi_evaluate_integer(video->handle, "_GPD", NULL, id);
452
453 return_VALUE(status);
454}
455
456static int
457acpi_video_bus_POST_options (
458 struct acpi_video_bus *video,
459 unsigned long *options)
460{
461 int status;
462 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_options");
463
464 status = acpi_evaluate_integer(video->handle, "_VPO", NULL, options);
465 *options &= 3;
466
467 return_VALUE(status);
468}
469
470/*
471 * Arg:
472 * video : video bus device pointer
473 * bios_flag :
474 * 0. The system BIOS should NOT automatically switch(toggle)
475 * the active display output.
476 * 1. The system BIOS should automatically switch (toggle) the
477 * active display output. No swich event.
478 * 2. The _DGS value should be locked.
479 * 3. The system BIOS should not automatically switch (toggle) the
480 * active display output, but instead generate the display switch
481 * event notify code.
482 * lcd_flag :
483 * 0. The system BIOS should automatically control the brightness level
484 * of the LCD, when the power changes from AC to DC
485 * 1. The system BIOS should NOT automatically control the brightness
486 * level of the LCD, when the power changes from AC to DC.
487 * Return Value:
488 * -1 wrong arg.
489 */
490
491static int
492acpi_video_bus_DOS(
493 struct acpi_video_bus *video,
494 int bios_flag,
495 int lcd_flag)
496{
497 acpi_integer status = 0;
498 union acpi_object arg0 = {ACPI_TYPE_INTEGER};
499 struct acpi_object_list args = {1, &arg0};
500
501 ACPI_FUNCTION_TRACE("acpi_video_bus_DOS");
502
503 if (bios_flag < 0 || bios_flag >3 || lcd_flag < 0 || lcd_flag > 1){
504 status = -1;
505 goto Failed;
506 }
507 arg0.integer.value = (lcd_flag << 2) | bios_flag;
508 video->dos_setting = arg0.integer.value;
509 acpi_evaluate_object(video->handle, "_DOS", &args, NULL);
510
511Failed:
512 return_VALUE(status);
513}
514
515/*
516 * Arg:
517 * device : video output device (LCD, CRT, ..)
518 *
519 * Return Value:
520 * None
521 *
522 * Find out all required AML method defined under the output
523 * device.
524 */
525
526static void
527acpi_video_device_find_cap (struct acpi_video_device *device)
528{
529 acpi_integer status;
530 acpi_handle h_dummy1;
531 int i;
532 union acpi_object *obj = NULL;
533 struct acpi_video_device_brightness *br = NULL;
534
535 ACPI_FUNCTION_TRACE("acpi_video_device_find_cap");
536
537 memset( &device->cap, 0, 4);
538
539 if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_ADR", &h_dummy1))) {
540 device->cap._ADR = 1;
541 }
542 if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCL", &h_dummy1))) {
543 device->cap._BCL= 1;
544 }
545 if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCM", &h_dummy1))) {
546 device->cap._BCM= 1;
547 }
548 if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_DDC", &h_dummy1))) {
549 device->cap._DDC= 1;
550 }
551 if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_DCS", &h_dummy1))) {
552 device->cap._DCS = 1;
553 }
554 if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_DGS", &h_dummy1))) {
555 device->cap._DGS = 1;
556 }
557 if( ACPI_SUCCESS(acpi_get_handle(device->handle, "_DSS", &h_dummy1))) {
558 device->cap._DSS = 1;
559 }
560
561 status = acpi_video_device_lcd_query_levels(device, &obj);
562
563 if (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
564 int count = 0;
565 union acpi_object *o;
566
d1dd0c23 567 br = kmalloc(sizeof(*br), GFP_KERNEL);
1da177e4
LT		 568 if (!br) {
569 printk(KERN_ERR "can't allocate memory\n");
570 } else {
d1dd0c23
PM		 571 memset(br, 0, sizeof(*br));
572 br->levels = kmalloc(obj->package.count *
573 sizeof *(br->levels), GFP_KERNEL);
1da177e4
LT		 574 if (!br->levels)
575 goto out;
576
577 for (i = 0; i < obj->package.count; i++) {
578 o = (union acpi_object *) &obj->package.elements[i];
579 if (o->type != ACPI_TYPE_INTEGER) {
580 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data\n"));
581 continue;
582 }
583 br->levels[count] = (u32) o->integer.value;
584 count++;
585 }
586out:
587 if (count < 2) {
d1dd0c23 588 kfree(br->levels);
1da177e4
LT		 589 kfree(br);
590 } else {
591 br->count = count;
592 device->brightness = br;
593 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "found %d brightness levels\n", count));
594 }
595 }
596 }
597
d1dd0c23 598 kfree(obj);
1da177e4
LT		 599
600 return_VOID;
601}
602
603/*
604 * Arg:
605 * device : video output device (VGA)
606 *
607 * Return Value:
608 * None
609 *
610 * Find out all required AML method defined under the video bus device.
611 */
612
613static void
614acpi_video_bus_find_cap (struct acpi_video_bus *video)
615{
616 acpi_handle h_dummy1;
617
618 memset(&video->cap ,0, 4);
619 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOS", &h_dummy1))) {
620 video->cap._DOS = 1;
621 }
622 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOD", &h_dummy1))) {
623 video->cap._DOD = 1;
624 }
625 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_ROM", &h_dummy1))) {
626 video->cap._ROM = 1;
627 }
628 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_GPD", &h_dummy1))) {
629 video->cap._GPD = 1;
630 }
631 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_SPD", &h_dummy1))) {
632 video->cap._SPD = 1;
633 }
634 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_VPO", &h_dummy1))) {
635 video->cap._VPO = 1;
636 }
637}
638
639/*
640 * Check whether the video bus device has required AML method to
641 * support the desired features
642 */
643
644static int
645acpi_video_bus_check (
646 struct acpi_video_bus *video)
647{
648 acpi_status status = -ENOENT;
649
650
651 ACPI_FUNCTION_TRACE("acpi_video_bus_check");
652
653 if (!video)
654 return_VALUE(-EINVAL);
655
656 /* Since there is no HID, CID and so on for VGA driver, we have
657 * to check well known required nodes.
658 */
659
660 /* Does this device able to support video switching ? */
661 if(video->cap._DOS){
662 video->flags.multihead = 1;
663 status = 0;
664 }
665
666 /* Does this device able to retrieve a retrieve a video ROM ? */
667 if(video->cap._ROM){
668 video->flags.rom = 1;
669 status = 0;
670 }
671
672 /* Does this device able to configure which video device to POST ? */
673 if(video->cap._GPD && video->cap._SPD && video->cap._VPO){
674 video->flags.post = 1;
675 status = 0;
676 }
677
678 return_VALUE(status);
679}
680
681/* --------------------------------------------------------------------------
682 FS Interface (/proc)
683 -------------------------------------------------------------------------- */
684
685static struct proc_dir_entry *acpi_video_dir;
686
687/* video devices */
688
689static int
690acpi_video_device_info_seq_show (
691 struct seq_file *seq,
692 void *offset)
693{
694 struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
695
696 ACPI_FUNCTION_TRACE("acpi_video_device_info_seq_show");
697
698 if (!dev)
699 goto end;
700
701 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
702 seq_printf(seq, "type: ");
703 if (dev->flags.crt)
704 seq_printf(seq, "CRT\n");
705 else if (dev->flags.lcd)
706 seq_printf(seq, "LCD\n");
707 else if (dev->flags.tvout)
708 seq_printf(seq, "TVOUT\n");
709 else
710 seq_printf(seq, "UNKNOWN\n");
711
712 seq_printf(seq,"known by bios: %s\n",
713 dev->flags.bios ? "yes":"no");
714
715end:
716 return_VALUE(0);
717}
718
719static int
720acpi_video_device_info_open_fs (
721 struct inode *inode,
722 struct file *file)
723{
724 return single_open(file, acpi_video_device_info_seq_show,
725 PDE(inode)->data);
726}
727
728static int
729acpi_video_device_state_seq_show (
730 struct seq_file *seq,
731 void *offset)
732{
733 int status;
734 struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
735 unsigned long state;
736
737 ACPI_FUNCTION_TRACE("acpi_video_device_state_seq_show");
738
739 if (!dev)
740 goto end;
741
742 status = acpi_video_device_get_state(dev, &state);
743 seq_printf(seq, "state: ");
744 if (ACPI_SUCCESS(status))
745 seq_printf(seq, "0x%02lx\n", state);
746 else
747 seq_printf(seq, "<not supported>\n");
748
749 status = acpi_video_device_query(dev, &state);
750 seq_printf(seq, "query: ");
751 if (ACPI_SUCCESS(status))
752 seq_printf(seq, "0x%02lx\n", state);
753 else
754 seq_printf(seq, "<not supported>\n");
755
756end:
757 return_VALUE(0);
758}
759
760static int
761acpi_video_device_state_open_fs (
762 struct inode *inode,
763 struct file *file)
764{
765 return single_open(file, acpi_video_device_state_seq_show,
766 PDE(inode)->data);
767}
768
769static ssize_t
770acpi_video_device_write_state (
771 struct file *file,
772 const char __user *buffer,
773 size_t count,
774 loff_t *data)
775{
776 int status;
777 struct seq_file *m = (struct seq_file *) file->private_data;
778 struct acpi_video_device *dev = (struct acpi_video_device *) m->private;
779 char str[12] = {0};
780 u32 state = 0;
781
782 ACPI_FUNCTION_TRACE("acpi_video_device_write_state");
783
784 if (!dev || count + 1 > sizeof str)
785 return_VALUE(-EINVAL);
786
787 if (copy_from_user(str, buffer, count))
788 return_VALUE(-EFAULT);
789
790 str[count] = 0;
791 state = simple_strtoul(str, NULL, 0);
792 state &= ((1ul<<31) | (1ul<<30) | (1ul<<0));
793
794 status = acpi_video_device_set_state(dev, state);
795
796 if (status)
797 return_VALUE(-EFAULT);
798
799 return_VALUE(count);
800}
801
802static int
803acpi_video_device_brightness_seq_show (
804 struct seq_file *seq,
805 void *offset)
806{
807 struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
808 int i;
809
810 ACPI_FUNCTION_TRACE("acpi_video_device_brightness_seq_show");
811
812 if (!dev || !dev->brightness) {
813 seq_printf(seq, "<not supported>\n");
814 return_VALUE(0);
815 }
816
817 seq_printf(seq, "levels: ");
818 for (i = 0; i < dev->brightness->count; i++)
819 seq_printf(seq, " %d", dev->brightness->levels[i]);
820 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
821
822 return_VALUE(0);
823}
824
825static int
826acpi_video_device_brightness_open_fs (
827 struct inode *inode,
828 struct file *file)
829{
830 return single_open(file, acpi_video_device_brightness_seq_show,
831 PDE(inode)->data);
832}
833
834static ssize_t
835acpi_video_device_write_brightness (
836 struct file *file,
837 const char __user *buffer,
838 size_t count,
839 loff_t *data)
840{
841 struct seq_file *m = (struct seq_file *) file->private_data;
842 struct acpi_video_device *dev = (struct acpi_video_device *) m->private;
843 char str[4] = {0};
844 unsigned int level = 0;
845 int i;
846
847 ACPI_FUNCTION_TRACE("acpi_video_device_write_brightness");
848
849 if (!dev || count + 1 > sizeof str)
850 return_VALUE(-EINVAL);
851
852 if (copy_from_user(str, buffer, count))
853 return_VALUE(-EFAULT);
854
855 str[count] = 0;
856 level = simple_strtoul(str, NULL, 0);
857
858 if (level > 100)
859 return_VALUE(-EFAULT);
860
861 /* validate though the list of available levels */
862 for (i = 0; i < dev->brightness->count; i++)
863 if (level == dev->brightness->levels[i]) {
864 if (ACPI_SUCCESS(acpi_video_device_lcd_set_level(dev, level)))
865 dev->brightness->curr = level;
866 break;
867 }
868
869 return_VALUE(count);
870}
871
872static int
873acpi_video_device_EDID_seq_show (
874 struct seq_file *seq,
875 void *offset)
876{
877 struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
878 int status;
879 int i;
880 union acpi_object *edid = NULL;
881
882 ACPI_FUNCTION_TRACE("acpi_video_device_EDID_seq_show");
883
884 if (!dev)
885 goto out;
886
887 status = acpi_video_device_EDID (dev, &edid, 128);
888 if (ACPI_FAILURE(status)) {
889 status = acpi_video_device_EDID (dev, &edid, 256);
890 }
891
892 if (ACPI_FAILURE(status)) {
893 goto out;
894 }
895
896 if (edid && edid->type == ACPI_TYPE_BUFFER) {
897 for (i = 0; i < edid->buffer.length; i++)
898 seq_putc(seq, edid->buffer.pointer[i]);
899 }
900
901out:
902 if (!edid)
903 seq_printf(seq, "<not supported>\n");
904 else
905 kfree(edid);
906
907 return_VALUE(0);
908}
909
910static int
911acpi_video_device_EDID_open_fs (
912 struct inode *inode,
913 struct file *file)
914{
915 return single_open(file, acpi_video_device_EDID_seq_show,
916 PDE(inode)->data);
917}
918
919
920static int
921acpi_video_device_add_fs (
922 struct acpi_device *device)
923{
924 struct proc_dir_entry *entry = NULL;
925 struct acpi_video_device *vid_dev;
926
927 ACPI_FUNCTION_TRACE("acpi_video_device_add_fs");
928
929 if (!device)
930 return_VALUE(-ENODEV);
931
932 vid_dev = (struct acpi_video_device *) acpi_driver_data(device);
933 if (!vid_dev)
934 return_VALUE(-ENODEV);
935
936 if (!acpi_device_dir(device)) {
937 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
938 vid_dev->video->dir);
939 if (!acpi_device_dir(device))
940 return_VALUE(-ENODEV);
941 acpi_device_dir(device)->owner = THIS_MODULE;
942 }
943
944 /* 'info' [R] */
945 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
946 if (!entry)
947 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
948 "Unable to create 'info' fs entry\n"));
949 else {
950 entry->proc_fops = &acpi_video_device_info_fops;
951 entry->data = acpi_driver_data(device);
952 entry->owner = THIS_MODULE;
953 }
954
955 /* 'state' [R/W] */
956 entry = create_proc_entry("state", S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
957 if (!entry)
958 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
959 "Unable to create 'state' fs entry\n"));
960 else {
961 entry->proc_fops = &acpi_video_device_state_fops;
962 entry->proc_fops->write = acpi_video_device_write_state;
963 entry->data = acpi_driver_data(device);
964 entry->owner = THIS_MODULE;
965 }
966
967 /* 'brightness' [R/W] */
968 entry = create_proc_entry("brightness", S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
969 if (!entry)
970 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
971 "Unable to create 'brightness' fs entry\n"));
972 else {
973 entry->proc_fops = &acpi_video_device_brightness_fops;
974 entry->proc_fops->write = acpi_video_device_write_brightness;
975 entry->data = acpi_driver_data(device);
976 entry->owner = THIS_MODULE;
977 }
978
979 /* 'EDID' [R] */
980 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
981 if (!entry)
982 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
983 "Unable to create 'brightness' fs entry\n"));
984 else {
985 entry->proc_fops = &acpi_video_device_EDID_fops;
986 entry->data = acpi_driver_data(device);
987 entry->owner = THIS_MODULE;
988 }
989
990 return_VALUE(0);
991}
992
993static int
994acpi_video_device_remove_fs (
995 struct acpi_device *device)
996{
997 struct acpi_video_device *vid_dev;
998 ACPI_FUNCTION_TRACE("acpi_video_device_remove_fs");
999
1000 vid_dev = (struct acpi_video_device *) acpi_driver_data(device);
1001 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1002 return_VALUE(-ENODEV);
1003
1004 if (acpi_device_dir(device)) {
1005 remove_proc_entry("info", acpi_device_dir(device));
1006 remove_proc_entry("state", acpi_device_dir(device));
1007 remove_proc_entry("brightness", acpi_device_dir(device));
1008 remove_proc_entry("EDID", acpi_device_dir(device));
1009 remove_proc_entry(acpi_device_bid(device),
1010 vid_dev->video->dir);
1011 acpi_device_dir(device) = NULL;
1012 }
1013
1014 return_VALUE(0);
1015}
1016
1017
1018/* video bus */
1019static int
1020acpi_video_bus_info_seq_show (
1021 struct seq_file *seq,
1022 void *offset)
1023{
1024 struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
1025
1026 ACPI_FUNCTION_TRACE("acpi_video_bus_info_seq_show");
1027
1028 if (!video)
1029 goto end;
1030
1031 seq_printf(seq, "Switching heads: %s\n",
1032 video->flags.multihead ? "yes":"no");
1033 seq_printf(seq, "Video ROM: %s\n",
1034 video->flags.rom ? "yes":"no");
1035 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1036 video->flags.post ? "yes":"no");
1037
1038end:
1039 return_VALUE(0);
1040}
1041
1042static int
1043acpi_video_bus_info_open_fs (
1044 struct inode *inode,
1045 struct file *file)
1046{
1047 return single_open(file, acpi_video_bus_info_seq_show, PDE(inode)->data);
1048}
1049
1050static int
1051acpi_video_bus_ROM_seq_show (
1052 struct seq_file *seq,
1053 void *offset)
1054{
1055 struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
1056
1057 ACPI_FUNCTION_TRACE("acpi_video_bus_ROM_seq_show");
1058
1059 if (!video)
1060 goto end;
1061
1062 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1063 seq_printf(seq, "<TODO>\n");
1064
1065end:
1066 return_VALUE(0);
1067}
1068
1069static int
1070acpi_video_bus_ROM_open_fs (
1071 struct inode *inode,
1072 struct file *file)
1073{
1074 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1075}
1076
1077static int
1078acpi_video_bus_POST_info_seq_show (
1079 struct seq_file *seq,
1080 void *offset)
1081{
1082 struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
1083 unsigned long options;
1084 int status;
1085
1086 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_info_seq_show");
1087
1088 if (!video)
1089 goto end;
1090
1091 status = acpi_video_bus_POST_options(video, &options);
1092 if (ACPI_SUCCESS(status)) {
1093 if (!(options & 1)) {
1094 printk(KERN_WARNING PREFIX "The motherboard VGA device is not listed as a possible POST device.\n");
1095 printk(KERN_WARNING PREFIX "This indicate a BIOS bug. Please contact the manufacturer.\n");
1096 }
1097 printk("%lx\n", options);
1098 seq_printf(seq, "can POST: <intgrated video>");
1099 if (options & 2)
1100 seq_printf(seq, " <PCI video>");
1101 if (options & 4)
1102 seq_printf(seq, " <AGP video>");
1103 seq_putc(seq, '\n');
1104 } else
1105 seq_printf(seq, "<not supported>\n");
1106end:
1107 return_VALUE(0);
1108}
1109
1110static int
1111acpi_video_bus_POST_info_open_fs (
1112 struct inode *inode,
1113 struct file *file)
1114{
1115 return single_open(file, acpi_video_bus_POST_info_seq_show, PDE(inode)->data);
1116}
1117
1118static int
1119acpi_video_bus_POST_seq_show (
1120 struct seq_file *seq,
1121 void *offset)
1122{
1123 struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
1124 int status;
1125 unsigned long id;
1126
1127 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_seq_show");
1128
1129 if (!video)
1130 goto end;
1131
1132 status = acpi_video_bus_get_POST (video, &id);
1133 if (!ACPI_SUCCESS(status)) {
1134 seq_printf(seq, "<not supported>\n");
1135 goto end;
1136 }
1137 seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
1138
1139end:
1140 return_VALUE(0);
1141}
1142
1143static int
1144acpi_video_bus_DOS_seq_show (
1145 struct seq_file *seq,
1146 void *offset)
1147{
1148 struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
1149
1150 ACPI_FUNCTION_TRACE("acpi_video_bus_DOS_seq_show");
1151
1152 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting );
1153
1154 return_VALUE(0);
1155}
1156
1157static int
1158acpi_video_bus_POST_open_fs (
1159 struct inode *inode,
1160 struct file *file)
1161{
1162 return single_open(file, acpi_video_bus_POST_seq_show, PDE(inode)->data);
1163}
1164
1165static int
1166acpi_video_bus_DOS_open_fs (
1167 struct inode *inode,
1168 struct file *file)
1169{
1170 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1171}
1172
1173static ssize_t
1174acpi_video_bus_write_POST (
1175 struct file *file,
1176 const char __user *buffer,
1177 size_t count,
1178 loff_t *data)
1179{
1180 int status;
1181 struct seq_file *m = (struct seq_file *) file->private_data;
1182 struct acpi_video_bus *video = (struct acpi_video_bus *) m->private;
1183 char str[12] = {0};
1184 unsigned long opt, options;
1185
1186 ACPI_FUNCTION_TRACE("acpi_video_bus_write_POST");
1187
1188
1189 if (!video || count + 1 > sizeof str)
1190 return_VALUE(-EINVAL);
1191
1192 status = acpi_video_bus_POST_options(video, &options);
1193 if (!ACPI_SUCCESS(status))
1194 return_VALUE(-EINVAL);
1195
1196 if (copy_from_user(str, buffer, count))
1197 return_VALUE(-EFAULT);
1198
1199 str[count] = 0;
1200 opt = strtoul(str, NULL, 0);
1201 if (opt > 3)
1202 return_VALUE(-EFAULT);
1203
1204 /* just in case an OEM 'forget' the motherboard... */
1205 options |= 1;
1206
1207 if (options & (1ul << opt)) {
1208 status = acpi_video_bus_set_POST (video, opt);
1209 if (!ACPI_SUCCESS(status))
1210 return_VALUE(-EFAULT);
1211
1212 }
1213
1214
1215 return_VALUE(count);
1216}
1217
1218static ssize_t
1219acpi_video_bus_write_DOS (
1220 struct file *file,
1221 const char __user *buffer,
1222 size_t count,
1223 loff_t *data)
1224{
1225 int status;
1226 struct seq_file *m = (struct seq_file *) file->private_data;
1227 struct acpi_video_bus *video = (struct acpi_video_bus *) m->private;
1228 char str[12] = {0};
1229 unsigned long opt;
1230
1231 ACPI_FUNCTION_TRACE("acpi_video_bus_write_DOS");
1232
1233
1234 if (!video || count + 1 > sizeof str)
1235 return_VALUE(-EINVAL);
1236
1237 if (copy_from_user(str, buffer, count))
1238 return_VALUE(-EFAULT);
1239
1240 str[count] = 0;
1241 opt = strtoul(str, NULL, 0);
1242 if (opt > 7)
1243 return_VALUE(-EFAULT);
1244
1245 status = acpi_video_bus_DOS (video, opt & 0x3, (opt & 0x4)>>2);
1246
1247 if (!ACPI_SUCCESS(status))
1248 return_VALUE(-EFAULT);
1249
1250 return_VALUE(count);
1251}
1252
1253static int
1254acpi_video_bus_add_fs (
1255 struct acpi_device *device)
1256{
1257 struct proc_dir_entry *entry = NULL;
1258 struct acpi_video_bus *video;
1259
1260 ACPI_FUNCTION_TRACE("acpi_video_bus_add_fs");
1261
1262 video = (struct acpi_video_bus *) acpi_driver_data(device);
1263
1264 if (!acpi_device_dir(device)) {
1265 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1266 acpi_video_dir);
1267 if (!acpi_device_dir(device))
1268 return_VALUE(-ENODEV);
1269 video->dir = acpi_device_dir(device);
1270 acpi_device_dir(device)->owner = THIS_MODULE;
1271 }
1272
1273 /* 'info' [R] */
1274 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1275 if (!entry)
1276 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'info' fs entry\n"));
1277 else {
1278 entry->proc_fops = &acpi_video_bus_info_fops;
1279 entry->data = acpi_driver_data(device);
1280 entry->owner = THIS_MODULE;
1281 }
1282
1283 /* 'ROM' [R] */
1284 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1285 if (!entry)
1286 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'ROM' fs entry\n"));
1287 else {
1288 entry->proc_fops = &acpi_video_bus_ROM_fops;
1289 entry->data = acpi_driver_data(device);
1290 entry->owner = THIS_MODULE;
1291 }
1292
1293 /* 'POST_info' [R] */
1294 entry = create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1295 if (!entry)
1296 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'POST_info' fs entry\n"));
1297 else {
1298 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1299 entry->data = acpi_driver_data(device);
1300 entry->owner = THIS_MODULE;
1301 }
1302
1303 /* 'POST' [R/W] */
1304 entry = create_proc_entry("POST", S_IFREG|S_IRUGO|S_IRUSR, acpi_device_dir(device));
1305 if (!entry)
1306 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'POST' fs entry\n"));
1307 else {
1308 entry->proc_fops = &acpi_video_bus_POST_fops;
1309 entry->proc_fops->write = acpi_video_bus_write_POST;
1310 entry->data = acpi_driver_data(device);
1311 entry->owner = THIS_MODULE;
1312 }
1313
1314 /* 'DOS' [R/W] */
1315 entry = create_proc_entry("DOS", S_IFREG|S_IRUGO|S_IRUSR, acpi_device_dir(device));
1316 if (!entry)
1317 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'DOS' fs entry\n"));
1318 else {
1319 entry->proc_fops = &acpi_video_bus_DOS_fops;
1320 entry->proc_fops->write = acpi_video_bus_write_DOS;
1321 entry->data = acpi_driver_data(device);
1322 entry->owner = THIS_MODULE;
1323 }
1324
1325 return_VALUE(0);
1326}
1327
1328static int
1329acpi_video_bus_remove_fs (
1330 struct acpi_device *device)
1331{
1332 struct acpi_video_bus *video;
1333
1334 ACPI_FUNCTION_TRACE("acpi_video_bus_remove_fs");
1335
1336 video = (struct acpi_video_bus *) acpi_driver_data(device);
1337
1338 if (acpi_device_dir(device)) {
1339 remove_proc_entry("info", acpi_device_dir(device));
1340 remove_proc_entry("ROM", acpi_device_dir(device));
1341 remove_proc_entry("POST_info", acpi_device_dir(device));
1342 remove_proc_entry("POST", acpi_device_dir(device));
1343 remove_proc_entry("DOS", acpi_device_dir(device));
1344 remove_proc_entry(acpi_device_bid(device),
1345 acpi_video_dir);
1346 acpi_device_dir(device) = NULL;
1347 }
1348
1349 return_VALUE(0);
1350}
1351
1352/* --------------------------------------------------------------------------
1353 Driver Interface
1354 -------------------------------------------------------------------------- */
1355
1356/* device interface */
1357
1358static int
1359acpi_video_bus_get_one_device (
1360 struct acpi_device *device,
1361 struct acpi_video_bus *video)
1362{
1363 unsigned long device_id;
1364 int status, result;
1365 struct acpi_video_device *data;
1366
1367 ACPI_FUNCTION_TRACE("acpi_video_bus_get_one_device");
1368
1369 if (!device || !video)
1370 return_VALUE(-EINVAL);
1371
1372 status = acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1373 if (ACPI_SUCCESS(status)) {
1374
1375 data = kmalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1376 if (!data)
1377 return_VALUE(-ENOMEM);
1378
1379 memset(data, 0, sizeof(struct acpi_video_device));
1380
1381 data->handle = device->handle;
1382 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1383 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1384 acpi_driver_data(device) = data;
1385
1386 data->device_id = device_id;
1387 data->video = video;
1388 data->dev = device;
1389
1390 switch (device_id & 0xffff) {
1391 case 0x0100:
1392 data->flags.crt = 1;
1393 break;
1394 case 0x0400:
1395 data->flags.lcd = 1;
1396 break;
1397 case 0x0200:
1398 data->flags.tvout = 1;
1399 break;
1400 default:
1401 data->flags.unknown = 1;
1402 break;
1403 }
1404
1405 acpi_video_device_bind(video, data);
1406 acpi_video_device_find_cap(data);
1407
1408 status = acpi_install_notify_handler(data->handle,
1409 ACPI_DEVICE_NOTIFY, acpi_video_device_notify, data);
1410 if (ACPI_FAILURE(status)) {
1411 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1412 "Error installing notify handler\n"));
1413 result = -ENODEV;
1414 goto end;
1415 }
1416
1417 down(&video->sem);
1418 list_add_tail(&data->entry, &video->video_device_list);
1419 up(&video->sem);
1420
1421 acpi_video_device_add_fs(device);
1422
1423 return_VALUE(0);
1424 }
1425
1426end:
1427 return_VALUE(-ENOENT);
1428}
1429
1430/*
1431 * Arg:
1432 * video : video bus device
1433 *
1434 * Return:
1435 * none
1436 *
1437 * Enumerate the video device list of the video bus,
1438 * bind the ids with the corresponding video devices
1439 * under the video bus.
1440 */
1441
1442static void
1443acpi_video_device_rebind( struct acpi_video_bus *video)
1444{
1445 struct list_head * node, * next;
1446 list_for_each_safe(node, next, &video->video_device_list) {
1447 struct acpi_video_device * dev = container_of(node, struct acpi_video_device, entry);
1448 acpi_video_device_bind( video, dev);
1449 }
1450}
1451
1452/*
1453 * Arg:
1454 * video : video bus device
1455 * device : video output device under the video
1456 * bus
1457 *
1458 * Return:
1459 * none
1460 *
1461 * Bind the ids with the corresponding video devices
1462 * under the video bus.
1463 */
1464
1465static void
1466acpi_video_device_bind( struct acpi_video_bus *video,
1467 struct acpi_video_device *device)
1468{
1469 int i;
1470 ACPI_FUNCTION_TRACE("acpi_video_device_bind");
1471
1472#define IDS_VAL(i) video->attached_array[i].value.int_val
1473#define IDS_BIND(i) video->attached_array[i].bind_info
1474
1475 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1476 i < video->attached_count; i++) {
1477 if (device->device_id == (IDS_VAL(i)& 0xffff)) {
1478 IDS_BIND(i) = device;
1479 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1480 }
1481 }
1482#undef IDS_VAL
1483#undef IDS_BIND
1484}
1485
1486/*
1487 * Arg:
1488 * video : video bus device
1489 *
1490 * Return:
1491 * < 0 : error
1492 *
1493 * Call _DOD to enumerate all devices attached to display adapter
1494 *
1495 */
1496
1497static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1498{
1499 int status;
1500 int count;
1501 int i;
1502 struct acpi_video_enumerated_device *active_device_list;
1503 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
1504 union acpi_object *dod = NULL;
1505 union acpi_object *obj;
1506
1507 ACPI_FUNCTION_TRACE("acpi_video_device_enumerate");
1508
1509 status = acpi_evaluate_object(video->handle, "_DOD", NULL, &buffer);
1510 if (!ACPI_SUCCESS(status)) {
1511 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _DOD\n"));
1512 return_VALUE(status);
1513 }
1514
1515 dod = (union acpi_object *) buffer.pointer;
1516 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1517 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DOD data\n"));
1518 status = -EFAULT;
1519 goto out;
1520 }
1521
1522 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1523 dod->package.count));
1524
1525 active_device_list= kmalloc(
1526 (1+dod->package.count)*sizeof(struct acpi_video_enumerated_device),
1527 GFP_KERNEL);
1528
1529 if (!active_device_list) {
1530 status = -ENOMEM;
1531 goto out;
1532 }
1533
1534 count = 0;
1535 for (i = 0; i < dod->package.count; i++) {
1536 obj = (union acpi_object *) &dod->package.elements[i];
1537
1538 if (obj->type != ACPI_TYPE_INTEGER) {
1539 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DOD data\n"));
1540 active_device_list[i].value.int_val = ACPI_VIDEO_HEAD_INVALID;
1541 }
1542 active_device_list[i].value.int_val = obj->integer.value;
1543 active_device_list[i].bind_info = NULL;
1544 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, (int) obj->integer.value));
1545 count++;
1546 }
1547 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1548
1549 if(video->attached_array)
1550 kfree(video->attached_array);
1551
1552 video->attached_array = active_device_list;
1553 video->attached_count = count;
1554out:
1555 acpi_os_free(buffer.pointer);
1556 return_VALUE(status);
1557}
1558
1559/*
1560 * Arg:
1561 * video : video bus device
1562 * event : Nontify Event
1563 *
1564 * Return:
1565 * < 0 : error
1566 *
1567 * 1. Find out the current active output device.
1568 * 2. Identify the next output device to switch
1569 * 3. call _DSS to do actual switch.
1570 */
1571
1572static int
1573acpi_video_switch_output(
1574 struct acpi_video_bus *video,
1575 int event)
1576{
1577 struct list_head * node, * next;
1578 struct acpi_video_device *dev=NULL;
1579 struct acpi_video_device *dev_next=NULL;
1580 struct acpi_video_device *dev_prev=NULL;
1581 unsigned long state;
1582 int status = 0;
1583
1584 ACPI_FUNCTION_TRACE("acpi_video_switch_output");
1585
1586 list_for_each_safe(node, next, &video->video_device_list) {
7334571f 1587 dev = container_of(node, struct acpi_video_device, entry);
1da177e4
LT		 1588 status = acpi_video_device_get_state(dev, &state);
1589 if (state & 0x2){
1590 dev_next = container_of(node->next, struct acpi_video_device, entry);
1591 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1592 goto out;
1593 }
1594 }
1595 dev_next = container_of(node->next, struct acpi_video_device, entry);
1596 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1597out:
1598 switch (event) {
1599 case ACPI_VIDEO_NOTIFY_CYCLE:
1600 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1601 acpi_video_device_set_state(dev, 0);
1602 acpi_video_device_set_state(dev_next, 0x80000001);
1603 break;
1604 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1605 acpi_video_device_set_state(dev, 0);
1606 acpi_video_device_set_state(dev_prev, 0x80000001);
1607 default:
1608 break;
1609 }
1610
1611 return_VALUE(status);
1612}
1613
1614static int
1615acpi_video_get_next_level(
1616 struct acpi_video_device *device,
1617 u32 level_current,
1618 u32 event)
1619{
1620 /*Fix me*/
1621 return level_current;
1622}
1623
1624
1625static void
1626acpi_video_switch_brightness (
1627 struct acpi_video_device *device,
1628 int event)
1629{
1630 unsigned long level_current, level_next;
1631 acpi_video_device_lcd_get_level_current(device, &level_current);
1632 level_next = acpi_video_get_next_level(device, level_current, event);
1633 acpi_video_device_lcd_set_level(device, level_next);
1634}
1635
1636static int
1637acpi_video_bus_get_devices (
1638 struct acpi_video_bus *video,
1639 struct acpi_device *device)
1640{
1641 int status = 0;
1642 struct list_head *node, *next;
1643
1644 ACPI_FUNCTION_TRACE("acpi_video_get_devices");
1645
1646 acpi_video_device_enumerate(video);
1647
1648 list_for_each_safe(node, next, &device->children) {
1649 struct acpi_device *dev = list_entry(node, struct acpi_device, node);
1650
1651 if (!dev)
1652 continue;
1653
1654 status = acpi_video_bus_get_one_device(dev, video);
1655 if (ACPI_FAILURE(status)) {
1656 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Cant attach device\n"));
1657 continue;
1658 }
1659
1660 }
1661 return_VALUE(status);
1662}
1663
1664static int
1665acpi_video_bus_put_one_device(
1666 struct acpi_video_device *device)
1667{
031ec77b 1668 acpi_status status;
1da177e4
LT		 1669 struct acpi_video_bus *video;
1670
1671 ACPI_FUNCTION_TRACE("acpi_video_bus_put_one_device");
1672
1673 if (!device || !device->video)
1674 return_VALUE(-ENOENT);
1675
1676 video = device->video;
1677
1678 down(&video->sem);
1679 list_del(&device->entry);
1680 up(&video->sem);
1681 acpi_video_device_remove_fs(device->dev);
1682
031ec77b
KK		 1683 status = acpi_remove_notify_handler(device->handle,
1684 ACPI_DEVICE_NOTIFY, acpi_video_device_notify);
1685 if (ACPI_FAILURE(status))
1686 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1687 "Error removing notify handler\n"));
1688
1da177e4
LT		 1689 return_VALUE(0);
1690}
1691
1692static int
1693acpi_video_bus_put_devices (
1694 struct acpi_video_bus *video)
1695{
1696 int status;
1697 struct list_head *node, *next;
1698
1699 ACPI_FUNCTION_TRACE("acpi_video_bus_put_devices");
1700
1701 list_for_each_safe(node, next, &video->video_device_list) {
1702 struct acpi_video_device *data = list_entry(node, struct acpi_video_device, entry);
1703 if (!data)
1704 continue;
1705
1706 status = acpi_video_bus_put_one_device(data);
1707 if(ACPI_FAILURE(status))
1708 printk(KERN_WARNING PREFIX "hhuuhhuu bug in acpi video driver.\n");
1709
1710 if (data->brightness)
1711 kfree(data->brightness);
1712
1713 kfree(data);
1714 }
1715
1716 return_VALUE(0);
1717}
1718
1719/* acpi_video interface */
1720
1721static int
1722acpi_video_bus_start_devices(
1723 struct acpi_video_bus *video)
1724{
1725 return acpi_video_bus_DOS(video, 1, 0);
1726}
1727
1728static int
1729acpi_video_bus_stop_devices(
1730 struct acpi_video_bus *video)
1731{
1732 return acpi_video_bus_DOS(video, 0, 1);
1733}
1734
1735static void
1736acpi_video_bus_notify (
1737 acpi_handle handle,
1738 u32 event,
1739 void *data)
1740{
1741 struct acpi_video_bus *video = (struct acpi_video_bus *) data;
1742 struct acpi_device *device = NULL;
1743
1744 ACPI_FUNCTION_TRACE("acpi_video_bus_notify");
1745 printk("video bus notify\n");
1746
1747 if (!video)
1748 return_VOID;
1749
1750 if (acpi_bus_get_device(handle, &device))
1751 return_VOID;
1752
1753 switch (event) {
1754 case ACPI_VIDEO_NOTIFY_SWITCH: /* User request that a switch occur,
1755 * most likely via hotkey. */
1756 acpi_bus_generate_event(device, event, 0);
1757 break;
1758
1759 case ACPI_VIDEO_NOTIFY_PROBE: /* User plug or remove a video
1760 * connector. */
1761 acpi_video_device_enumerate(video);
1762 acpi_video_device_rebind(video);
1763 acpi_video_switch_output(video, event);
1764 acpi_bus_generate_event(device, event, 0);
1765 break;
1766
1767 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed.*/
1768 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1769 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1770 acpi_video_switch_output(video, event);
1771 acpi_bus_generate_event(device, event, 0);
1772 break;
1773
1774 default:
1775 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1776 "Unsupported event [0x%x]\n", event));
1777 break;
1778 }
1779
1780 return_VOID;
1781}
1782
1783static void
1784acpi_video_device_notify (
1785 acpi_handle handle,
1786 u32 event,
1787 void *data)
1788{
1789 struct acpi_video_device *video_device = (struct acpi_video_device *) data;
1790 struct acpi_device *device = NULL;
1791
1792 ACPI_FUNCTION_TRACE("acpi_video_device_notify");
1793
1794 printk("video device notify\n");
1795 if (!video_device)
1796 return_VOID;
1797
1798 if (acpi_bus_get_device(handle, &device))
1799 return_VOID;
1800
1801 switch (event) {
1802 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1803 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1804 acpi_bus_generate_event(device, event, 0);
1805 break;
1806 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1807 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1808 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1809 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1810 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1811 acpi_video_switch_brightness (video_device, event);
1812 acpi_bus_generate_event(device, event, 0);
1813 break;
1814 default:
1815 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1816 "Unsupported event [0x%x]\n", event));
1817 break;
1818 }
1819 return_VOID;
1820}
1821
1822static int
1823acpi_video_bus_add (
1824 struct acpi_device *device)
1825{
1826 int result = 0;
1827 acpi_status status = 0;
1828 struct acpi_video_bus *video = NULL;
1829
1830 ACPI_FUNCTION_TRACE("acpi_video_bus_add");
1831
1832 if (!device)
1833 return_VALUE(-EINVAL);
1834
1835 video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1836 if (!video)
1837 return_VALUE(-ENOMEM);
1838 memset(video, 0, sizeof(struct acpi_video_bus));
1839
1840 video->handle = device->handle;
1841 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1842 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1843 acpi_driver_data(device) = video;
1844
1845 acpi_video_bus_find_cap(video);
1846 result = acpi_video_bus_check(video);
1847 if (result)
1848 goto end;
1849
1850 result = acpi_video_bus_add_fs(device);
1851 if (result)
1852 goto end;
1853
1854 init_MUTEX(&video->sem);
1855 INIT_LIST_HEAD(&video->video_device_list);
1856
1857 acpi_video_bus_get_devices(video, device);
1858 acpi_video_bus_start_devices(video);
1859
1860 status = acpi_install_notify_handler(video->handle,
1861 ACPI_DEVICE_NOTIFY, acpi_video_bus_notify, video);
1862 if (ACPI_FAILURE(status)) {
1863 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1864 "Error installing notify handler\n"));
1865 result = -ENODEV;
1866 goto end;
1867 }
1868
1869 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1870 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1871 video->flags.multihead ? "yes":"no",
1872 video->flags.rom ? "yes":"no",
1873 video->flags.post ? "yes":"no");
1874
1875end:
1876 if (result) {
1877 acpi_video_bus_remove_fs(device);
1878 kfree(video);
1879 }
1880
1881 return_VALUE(result);
1882}
1883
1884static int
1885acpi_video_bus_remove (
1886 struct acpi_device *device,
1887 int type)
1888{
1889 acpi_status status = 0;
1890 struct acpi_video_bus *video = NULL;
1891
1892 ACPI_FUNCTION_TRACE("acpi_video_bus_remove");
1893
1894 if (!device || !acpi_driver_data(device))
1895 return_VALUE(-EINVAL);
1896
1897 video = (struct acpi_video_bus *) acpi_driver_data(device);
1898
1899 acpi_video_bus_stop_devices(video);
1900
1901 status = acpi_remove_notify_handler(video->handle,
1902 ACPI_DEVICE_NOTIFY, acpi_video_bus_notify);
1903 if (ACPI_FAILURE(status))
1904 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1905 "Error removing notify handler\n"));
1906
1907 acpi_video_bus_put_devices(video);
1908 acpi_video_bus_remove_fs(device);
1909
1910 if (video->attached_array)
1911 kfree(video->attached_array);
1912 kfree(video);
1913
1914 return_VALUE(0);
1915}
1916
1917
1918static int
1919acpi_video_bus_match (
1920 struct acpi_device *device,
1921 struct acpi_driver *driver)
1922{
1923 acpi_handle h_dummy1;
1924 acpi_handle h_dummy2;
1925 acpi_handle h_dummy3;
1926
1927 ACPI_FUNCTION_TRACE("acpi_video_bus_match");
1928
1929 if (!device || !driver)
1930 return_VALUE(-EINVAL);
1931
1932 /* Since there is no HID, CID for ACPI Video drivers, we have
1933 * to check well known required nodes for each feature we support.
1934 */
1935
1936 /* Does this device able to support video switching ? */
1937 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
1938 ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
1939 return_VALUE(0);
1940
1941 /* Does this device able to retrieve a video ROM ? */
1942 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
1943 return_VALUE(0);
1944
1945 /* Does this device able to configure which video head to be POSTed ? */
1946 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
1947 ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
1948 ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
1949 return_VALUE(0);
1950
1951
1952 return_VALUE(-ENODEV);
1953}
1954
1955
1956static int __init
1957acpi_video_init (void)
1958{
1959 int result = 0;
1960
1961 ACPI_FUNCTION_TRACE("acpi_video_init");
1962
1963 /*
1964 acpi_dbg_level = 0xFFFFFFFF;
1965 acpi_dbg_layer = 0x08000000;
1966 */
1967
1968 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1969 if (!acpi_video_dir)
1970 return_VALUE(-ENODEV);
1971 acpi_video_dir->owner = THIS_MODULE;
1972
1973 result = acpi_bus_register_driver(&acpi_video_bus);
1974 if (result < 0) {
1975 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1976 return_VALUE(-ENODEV);
1977 }
1978
1979 return_VALUE(0);
1980}
1981
1982static void __exit
1983acpi_video_exit (void)
1984{
1985 ACPI_FUNCTION_TRACE("acpi_video_exit");
1986
1987 acpi_bus_unregister_driver(&acpi_video_bus);
1988
1989 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1990
1991 return_VOID;
1992}
1993
1994module_init(acpi_video_init);
1995module_exit(acpi_video_exit);
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