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Automatic merge of rsync://rsync.kernel.org/pub/scm/linux/kernel/git/gregkh/driver...
[linux-2.6/verdex.git] / drivers / acpi / video.c
blob71fa1011715f36e413fa57aa1a1fe9d83528f01d
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
62 ACPI_MODULE_NAME ("acpi_video")
63
64 MODULE_AUTHOR("Bruno Ducrot");
65 MODULE_DESCRIPTION(ACPI_VIDEO_DRIVER_NAME);
66 MODULE_LICENSE("GPL");
67
68 static int acpi_video_bus_add (struct acpi_device *device);
69 static int acpi_video_bus_remove (struct acpi_device *device, int type);
70 static int acpi_video_bus_match (struct acpi_device *device, struct acpi_driver *driver);
71
72 static 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
82 struct 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
89 struct 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
99 struct 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
112 struct 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
120 struct 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
132 struct 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
141 struct 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
152 struct acpi_video_device_brightness {
153 int curr;
154 int count;
155 int *levels;
156 };
157
158 struct 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 */
171 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
172 static 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
179 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
180 static 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
187 static int acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file);
188 static 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
195 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
196 static 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
204 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
205 static 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 */
213 static int acpi_video_device_info_open_fs(struct inode *inode, struct file *file);
214 static 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
221 static int acpi_video_device_state_open_fs(struct inode *inode, struct file *file);
222 static 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
229 static int acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file);
230 static 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
237 static int acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file);
238 static 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
245 static char device_decode[][30] = {
246 "motherboard VGA device",
247 "PCI VGA device",
248 "AGP VGA device",
249 "UNKNOWN",
250 };
251
252 static void acpi_video_device_notify ( acpi_handle handle, u32 event, void *data);
253 static void acpi_video_device_rebind( struct acpi_video_bus *video);
254 static void acpi_video_device_bind( struct acpi_video_bus *video, struct acpi_video_device *device);
255 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
256 static int acpi_video_switch_output( struct acpi_video_bus *video, int event);
257 static int acpi_video_get_next_level( struct acpi_video_device *device, u32 level_current,u32 event);
258 static void acpi_video_switch_brightness ( struct acpi_video_device *device, int event);
259
260
261 /* --------------------------------------------------------------------------
262 Video Management
263 -------------------------------------------------------------------------- */
264
265 /* device */
266
267 static int
268 acpi_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
279 static int
280 acpi_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
293 static int
294 acpi_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
310 static int
311 acpi_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
338 err:
339 if (buffer.pointer)
340 kfree(buffer.pointer);
341
342 return_VALUE(status);
343 }
344
345 static int
346 acpi_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
363 static int
364 acpi_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
376 static int
377 acpi_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
421 static int
422 acpi_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
442 static int
443 acpi_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
456 static int
457 acpi_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
491 static int
492 acpi_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
511 Failed:
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
526 static void
527 acpi_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
567 br = kmalloc(sizeof &br, GFP_KERNEL);
568 if (!br) {
569 printk(KERN_ERR "can't allocate memory\n");
570 } else {
571 memset(br, 0, sizeof &br);
572 br->levels = kmalloc(obj->package.count * sizeof &br->levels, GFP_KERNEL);
573 if (!br->levels)
574 goto out;
575
576 for (i = 0; i < obj->package.count; i++) {
577 o = (union acpi_object *) &obj->package.elements[i];
578 if (o->type != ACPI_TYPE_INTEGER) {
579 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data\n"));
580 continue;
581 }
582 br->levels[count] = (u32) o->integer.value;
583 count++;
584 }
585 out:
586 if (count < 2) {
587 if (br->levels)
588 kfree(br->levels);
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
598 if (obj)
599 kfree(obj);
600
601 return_VOID;
602 }
603
604 /*
605 * Arg:
606 * device : video output device (VGA)
607 *
608 * Return Value:
609 * None
610 *
611 * Find out all required AML method defined under the video bus device.
612 */
613
614 static void
615 acpi_video_bus_find_cap (struct acpi_video_bus *video)
616 {
617 acpi_handle h_dummy1;
618
619 memset(&video->cap ,0, 4);
620 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOS", &h_dummy1))) {
621 video->cap._DOS = 1;
622 }
623 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOD", &h_dummy1))) {
624 video->cap._DOD = 1;
625 }
626 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_ROM", &h_dummy1))) {
627 video->cap._ROM = 1;
628 }
629 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_GPD", &h_dummy1))) {
630 video->cap._GPD = 1;
631 }
632 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_SPD", &h_dummy1))) {
633 video->cap._SPD = 1;
634 }
635 if( ACPI_SUCCESS(acpi_get_handle(video->handle, "_VPO", &h_dummy1))) {
636 video->cap._VPO = 1;
637 }
638 }
639
640 /*
641 * Check whether the video bus device has required AML method to
642 * support the desired features
643 */
644
645 static int
646 acpi_video_bus_check (
647 struct acpi_video_bus *video)
648 {
649 acpi_status status = -ENOENT;
650
651
652 ACPI_FUNCTION_TRACE("acpi_video_bus_check");
653
654 if (!video)
655 return_VALUE(-EINVAL);
656
657 /* Since there is no HID, CID and so on for VGA driver, we have
658 * to check well known required nodes.
659 */
660
661 /* Does this device able to support video switching ? */
662 if(video->cap._DOS){
663 video->flags.multihead = 1;
664 status = 0;
665 }
666
667 /* Does this device able to retrieve a retrieve a video ROM ? */
668 if(video->cap._ROM){
669 video->flags.rom = 1;
670 status = 0;
671 }
672
673 /* Does this device able to configure which video device to POST ? */
674 if(video->cap._GPD && video->cap._SPD && video->cap._VPO){
675 video->flags.post = 1;
676 status = 0;
677 }
678
679 return_VALUE(status);
680 }
681
682 /* --------------------------------------------------------------------------
683 FS Interface (/proc)
684 -------------------------------------------------------------------------- */
685
686 static struct proc_dir_entry *acpi_video_dir;
687
688 /* video devices */
689
690 static int
691 acpi_video_device_info_seq_show (
692 struct seq_file *seq,
693 void *offset)
694 {
695 struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
696
697 ACPI_FUNCTION_TRACE("acpi_video_device_info_seq_show");
698
699 if (!dev)
700 goto end;
701
702 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
703 seq_printf(seq, "type: ");
704 if (dev->flags.crt)
705 seq_printf(seq, "CRT\n");
706 else if (dev->flags.lcd)
707 seq_printf(seq, "LCD\n");
708 else if (dev->flags.tvout)
709 seq_printf(seq, "TVOUT\n");
710 else
711 seq_printf(seq, "UNKNOWN\n");
712
713 seq_printf(seq,"known by bios: %s\n",
714 dev->flags.bios ? "yes":"no");
715
716 end:
717 return_VALUE(0);
718 }
719
720 static int
721 acpi_video_device_info_open_fs (
722 struct inode *inode,
723 struct file *file)
724 {
725 return single_open(file, acpi_video_device_info_seq_show,
726 PDE(inode)->data);
727 }
728
729 static int
730 acpi_video_device_state_seq_show (
731 struct seq_file *seq,
732 void *offset)
733 {
734 int status;
735 struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
736 unsigned long state;
737
738 ACPI_FUNCTION_TRACE("acpi_video_device_state_seq_show");
739
740 if (!dev)
741 goto end;
742
743 status = acpi_video_device_get_state(dev, &state);
744 seq_printf(seq, "state: ");
745 if (ACPI_SUCCESS(status))
746 seq_printf(seq, "0x%02lx\n", state);
747 else
748 seq_printf(seq, "<not supported>\n");
749
750 status = acpi_video_device_query(dev, &state);
751 seq_printf(seq, "query: ");
752 if (ACPI_SUCCESS(status))
753 seq_printf(seq, "0x%02lx\n", state);
754 else
755 seq_printf(seq, "<not supported>\n");
756
757 end:
758 return_VALUE(0);
759 }
760
761 static int
762 acpi_video_device_state_open_fs (
763 struct inode *inode,
764 struct file *file)
765 {
766 return single_open(file, acpi_video_device_state_seq_show,
767 PDE(inode)->data);
768 }
769
770 static ssize_t
771 acpi_video_device_write_state (
772 struct file *file,
773 const char __user *buffer,
774 size_t count,
775 loff_t *data)
776 {
777 int status;
778 struct seq_file *m = (struct seq_file *) file->private_data;
779 struct acpi_video_device *dev = (struct acpi_video_device *) m->private;
780 char str[12] = {0};
781 u32 state = 0;
782
783 ACPI_FUNCTION_TRACE("acpi_video_device_write_state");
784
785 if (!dev || count + 1 > sizeof str)
786 return_VALUE(-EINVAL);
787
788 if (copy_from_user(str, buffer, count))
789 return_VALUE(-EFAULT);
790
791 str[count] = 0;
792 state = simple_strtoul(str, NULL, 0);
793 state &= ((1ul<<31) | (1ul<<30) | (1ul<<0));
794
795 status = acpi_video_device_set_state(dev, state);
796
797 if (status)
798 return_VALUE(-EFAULT);
799
800 return_VALUE(count);
801 }
802
803 static int
804 acpi_video_device_brightness_seq_show (
805 struct seq_file *seq,
806 void *offset)
807 {
808 struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
809 int i;
810
811 ACPI_FUNCTION_TRACE("acpi_video_device_brightness_seq_show");
812
813 if (!dev || !dev->brightness) {
814 seq_printf(seq, "<not supported>\n");
815 return_VALUE(0);
816 }
817
818 seq_printf(seq, "levels: ");
819 for (i = 0; i < dev->brightness->count; i++)
820 seq_printf(seq, " %d", dev->brightness->levels[i]);
821 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
822
823 return_VALUE(0);
824 }
825
826 static int
827 acpi_video_device_brightness_open_fs (
828 struct inode *inode,
829 struct file *file)
830 {
831 return single_open(file, acpi_video_device_brightness_seq_show,
832 PDE(inode)->data);
833 }
834
835 static ssize_t
836 acpi_video_device_write_brightness (
837 struct file *file,
838 const char __user *buffer,
839 size_t count,
840 loff_t *data)
841 {
842 struct seq_file *m = (struct seq_file *) file->private_data;
843 struct acpi_video_device *dev = (struct acpi_video_device *) m->private;
844 char str[4] = {0};
845 unsigned int level = 0;
846 int i;
847
848 ACPI_FUNCTION_TRACE("acpi_video_device_write_brightness");
849
850 if (!dev || count + 1 > sizeof str)
851 return_VALUE(-EINVAL);
852
853 if (copy_from_user(str, buffer, count))
854 return_VALUE(-EFAULT);
855
856 str[count] = 0;
857 level = simple_strtoul(str, NULL, 0);
858
859 if (level > 100)
860 return_VALUE(-EFAULT);
861
862 /* validate though the list of available levels */
863 for (i = 0; i < dev->brightness->count; i++)
864 if (level == dev->brightness->levels[i]) {
865 if (ACPI_SUCCESS(acpi_video_device_lcd_set_level(dev, level)))
866 dev->brightness->curr = level;
867 break;
868 }
869
870 return_VALUE(count);
871 }
872
873 static int
874 acpi_video_device_EDID_seq_show (
875 struct seq_file *seq,
876 void *offset)
877 {
878 struct acpi_video_device *dev = (struct acpi_video_device *) seq->private;
879 int status;
880 int i;
881 union acpi_object *edid = NULL;
882
883 ACPI_FUNCTION_TRACE("acpi_video_device_EDID_seq_show");
884
885 if (!dev)
886 goto out;
887
888 status = acpi_video_device_EDID (dev, &edid, 128);
889 if (ACPI_FAILURE(status)) {
890 status = acpi_video_device_EDID (dev, &edid, 256);
891 }
892
893 if (ACPI_FAILURE(status)) {
894 goto out;
895 }
896
897 if (edid && edid->type == ACPI_TYPE_BUFFER) {
898 for (i = 0; i < edid->buffer.length; i++)
899 seq_putc(seq, edid->buffer.pointer[i]);
900 }
901
902 out:
903 if (!edid)
904 seq_printf(seq, "<not supported>\n");
905 else
906 kfree(edid);
907
908 return_VALUE(0);
909 }
910
911 static int
912 acpi_video_device_EDID_open_fs (
913 struct inode *inode,
914 struct file *file)
915 {
916 return single_open(file, acpi_video_device_EDID_seq_show,
917 PDE(inode)->data);
918 }
919
920
921 static int
922 acpi_video_device_add_fs (
923 struct acpi_device *device)
924 {
925 struct proc_dir_entry *entry = NULL;
926 struct acpi_video_device *vid_dev;
927
928 ACPI_FUNCTION_TRACE("acpi_video_device_add_fs");
929
930 if (!device)
931 return_VALUE(-ENODEV);
932
933 vid_dev = (struct acpi_video_device *) acpi_driver_data(device);
934 if (!vid_dev)
935 return_VALUE(-ENODEV);
936
937 if (!acpi_device_dir(device)) {
938 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
939 vid_dev->video->dir);
940 if (!acpi_device_dir(device))
941 return_VALUE(-ENODEV);
942 acpi_device_dir(device)->owner = THIS_MODULE;
943 }
944
945 /* 'info' [R] */
946 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
947 if (!entry)
948 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
949 "Unable to create 'info' fs entry\n"));
950 else {
951 entry->proc_fops = &acpi_video_device_info_fops;
952 entry->data = acpi_driver_data(device);
953 entry->owner = THIS_MODULE;
954 }
955
956 /* 'state' [R/W] */
957 entry = create_proc_entry("state", S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
958 if (!entry)
959 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
960 "Unable to create 'state' fs entry\n"));
961 else {
962 entry->proc_fops = &acpi_video_device_state_fops;
963 entry->proc_fops->write = acpi_video_device_write_state;
964 entry->data = acpi_driver_data(device);
965 entry->owner = THIS_MODULE;
966 }
967
968 /* 'brightness' [R/W] */
969 entry = create_proc_entry("brightness", S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
970 if (!entry)
971 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
972 "Unable to create 'brightness' fs entry\n"));
973 else {
974 entry->proc_fops = &acpi_video_device_brightness_fops;
975 entry->proc_fops->write = acpi_video_device_write_brightness;
976 entry->data = acpi_driver_data(device);
977 entry->owner = THIS_MODULE;
978 }
979
980 /* 'EDID' [R] */
981 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
982 if (!entry)
983 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
984 "Unable to create 'brightness' fs entry\n"));
985 else {
986 entry->proc_fops = &acpi_video_device_EDID_fops;
987 entry->data = acpi_driver_data(device);
988 entry->owner = THIS_MODULE;
989 }
990
991 return_VALUE(0);
992 }
993
994 static int
995 acpi_video_device_remove_fs (
996 struct acpi_device *device)
997 {
998 struct acpi_video_device *vid_dev;
999 ACPI_FUNCTION_TRACE("acpi_video_device_remove_fs");
1000
1001 vid_dev = (struct acpi_video_device *) acpi_driver_data(device);
1002 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1003 return_VALUE(-ENODEV);
1004
1005 if (acpi_device_dir(device)) {
1006 remove_proc_entry("info", acpi_device_dir(device));
1007 remove_proc_entry("state", acpi_device_dir(device));
1008 remove_proc_entry("brightness", acpi_device_dir(device));
1009 remove_proc_entry("EDID", acpi_device_dir(device));
1010 remove_proc_entry(acpi_device_bid(device),
1011 vid_dev->video->dir);
1012 acpi_device_dir(device) = NULL;
1013 }
1014
1015 return_VALUE(0);
1016 }
1017
1018
1019 /* video bus */
1020 static int
1021 acpi_video_bus_info_seq_show (
1022 struct seq_file *seq,
1023 void *offset)
1024 {
1025 struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
1026
1027 ACPI_FUNCTION_TRACE("acpi_video_bus_info_seq_show");
1028
1029 if (!video)
1030 goto end;
1031
1032 seq_printf(seq, "Switching heads: %s\n",
1033 video->flags.multihead ? "yes":"no");
1034 seq_printf(seq, "Video ROM: %s\n",
1035 video->flags.rom ? "yes":"no");
1036 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1037 video->flags.post ? "yes":"no");
1038
1039 end:
1040 return_VALUE(0);
1041 }
1042
1043 static int
1044 acpi_video_bus_info_open_fs (
1045 struct inode *inode,
1046 struct file *file)
1047 {
1048 return single_open(file, acpi_video_bus_info_seq_show, PDE(inode)->data);
1049 }
1050
1051 static int
1052 acpi_video_bus_ROM_seq_show (
1053 struct seq_file *seq,
1054 void *offset)
1055 {
1056 struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
1057
1058 ACPI_FUNCTION_TRACE("acpi_video_bus_ROM_seq_show");
1059
1060 if (!video)
1061 goto end;
1062
1063 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1064 seq_printf(seq, "<TODO>\n");
1065
1066 end:
1067 return_VALUE(0);
1068 }
1069
1070 static int
1071 acpi_video_bus_ROM_open_fs (
1072 struct inode *inode,
1073 struct file *file)
1074 {
1075 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1076 }
1077
1078 static int
1079 acpi_video_bus_POST_info_seq_show (
1080 struct seq_file *seq,
1081 void *offset)
1082 {
1083 struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
1084 unsigned long options;
1085 int status;
1086
1087 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_info_seq_show");
1088
1089 if (!video)
1090 goto end;
1091
1092 status = acpi_video_bus_POST_options(video, &options);
1093 if (ACPI_SUCCESS(status)) {
1094 if (!(options & 1)) {
1095 printk(KERN_WARNING PREFIX "The motherboard VGA device is not listed as a possible POST device.\n");
1096 printk(KERN_WARNING PREFIX "This indicate a BIOS bug. Please contact the manufacturer.\n");
1097 }
1098 printk("%lx\n", options);
1099 seq_printf(seq, "can POST: <intgrated video>");
1100 if (options & 2)
1101 seq_printf(seq, " <PCI video>");
1102 if (options & 4)
1103 seq_printf(seq, " <AGP video>");
1104 seq_putc(seq, '\n');
1105 } else
1106 seq_printf(seq, "<not supported>\n");
1107 end:
1108 return_VALUE(0);
1109 }
1110
1111 static int
1112 acpi_video_bus_POST_info_open_fs (
1113 struct inode *inode,
1114 struct file *file)
1115 {
1116 return single_open(file, acpi_video_bus_POST_info_seq_show, PDE(inode)->data);
1117 }
1118
1119 static int
1120 acpi_video_bus_POST_seq_show (
1121 struct seq_file *seq,
1122 void *offset)
1123 {
1124 struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
1125 int status;
1126 unsigned long id;
1127
1128 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_seq_show");
1129
1130 if (!video)
1131 goto end;
1132
1133 status = acpi_video_bus_get_POST (video, &id);
1134 if (!ACPI_SUCCESS(status)) {
1135 seq_printf(seq, "<not supported>\n");
1136 goto end;
1137 }
1138 seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
1139
1140 end:
1141 return_VALUE(0);
1142 }
1143
1144 static int
1145 acpi_video_bus_DOS_seq_show (
1146 struct seq_file *seq,
1147 void *offset)
1148 {
1149 struct acpi_video_bus *video = (struct acpi_video_bus *) seq->private;
1150
1151 ACPI_FUNCTION_TRACE("acpi_video_bus_DOS_seq_show");
1152
1153 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting );
1154
1155 return_VALUE(0);
1156 }
1157
1158 static int
1159 acpi_video_bus_POST_open_fs (
1160 struct inode *inode,
1161 struct file *file)
1162 {
1163 return single_open(file, acpi_video_bus_POST_seq_show, PDE(inode)->data);
1164 }
1165
1166 static int
1167 acpi_video_bus_DOS_open_fs (
1168 struct inode *inode,
1169 struct file *file)
1170 {
1171 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1172 }
1173
1174 static ssize_t
1175 acpi_video_bus_write_POST (
1176 struct file *file,
1177 const char __user *buffer,
1178 size_t count,
1179 loff_t *data)
1180 {
1181 int status;
1182 struct seq_file *m = (struct seq_file *) file->private_data;
1183 struct acpi_video_bus *video = (struct acpi_video_bus *) m->private;
1184 char str[12] = {0};
1185 unsigned long opt, options;
1186
1187 ACPI_FUNCTION_TRACE("acpi_video_bus_write_POST");
1188
1189
1190 if (!video || count + 1 > sizeof str)
1191 return_VALUE(-EINVAL);
1192
1193 status = acpi_video_bus_POST_options(video, &options);
1194 if (!ACPI_SUCCESS(status))
1195 return_VALUE(-EINVAL);
1196
1197 if (copy_from_user(str, buffer, count))
1198 return_VALUE(-EFAULT);
1199
1200 str[count] = 0;
1201 opt = strtoul(str, NULL, 0);
1202 if (opt > 3)
1203 return_VALUE(-EFAULT);
1204
1205 /* just in case an OEM 'forget' the motherboard... */
1206 options |= 1;
1207
1208 if (options & (1ul << opt)) {
1209 status = acpi_video_bus_set_POST (video, opt);
1210 if (!ACPI_SUCCESS(status))
1211 return_VALUE(-EFAULT);
1212
1213 }
1214
1215
1216 return_VALUE(count);
1217 }
1218
1219 static ssize_t
1220 acpi_video_bus_write_DOS (
1221 struct file *file,
1222 const char __user *buffer,
1223 size_t count,
1224 loff_t *data)
1225 {
1226 int status;
1227 struct seq_file *m = (struct seq_file *) file->private_data;
1228 struct acpi_video_bus *video = (struct acpi_video_bus *) m->private;
1229 char str[12] = {0};
1230 unsigned long opt;
1231
1232 ACPI_FUNCTION_TRACE("acpi_video_bus_write_DOS");
1233
1234
1235 if (!video || count + 1 > sizeof str)
1236 return_VALUE(-EINVAL);
1237
1238 if (copy_from_user(str, buffer, count))
1239 return_VALUE(-EFAULT);
1240
1241 str[count] = 0;
1242 opt = strtoul(str, NULL, 0);
1243 if (opt > 7)
1244 return_VALUE(-EFAULT);
1245
1246 status = acpi_video_bus_DOS (video, opt & 0x3, (opt & 0x4)>>2);
1247
1248 if (!ACPI_SUCCESS(status))
1249 return_VALUE(-EFAULT);
1250
1251 return_VALUE(count);
1252 }
1253
1254 static int
1255 acpi_video_bus_add_fs (
1256 struct acpi_device *device)
1257 {
1258 struct proc_dir_entry *entry = NULL;
1259 struct acpi_video_bus *video;
1260
1261 ACPI_FUNCTION_TRACE("acpi_video_bus_add_fs");
1262
1263 video = (struct acpi_video_bus *) 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_VALUE(-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 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'info' fs entry\n"));
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 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'ROM' fs entry\n"));
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 = create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1296 if (!entry)
1297 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'POST_info' fs entry\n"));
1298 else {
1299 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1300 entry->data = acpi_driver_data(device);
1301 entry->owner = THIS_MODULE;
1302 }
1303
1304 /* 'POST' [R/W] */
1305 entry = create_proc_entry("POST", S_IFREG|S_IRUGO|S_IRUSR, acpi_device_dir(device));
1306 if (!entry)
1307 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'POST' fs entry\n"));
1308 else {
1309 entry->proc_fops = &acpi_video_bus_POST_fops;
1310 entry->proc_fops->write = acpi_video_bus_write_POST;
1311 entry->data = acpi_driver_data(device);
1312 entry->owner = THIS_MODULE;
1313 }
1314
1315 /* 'DOS' [R/W] */
1316 entry = create_proc_entry("DOS", S_IFREG|S_IRUGO|S_IRUSR, acpi_device_dir(device));
1317 if (!entry)
1318 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to create 'DOS' fs entry\n"));
1319 else {
1320 entry->proc_fops = &acpi_video_bus_DOS_fops;
1321 entry->proc_fops->write = acpi_video_bus_write_DOS;
1322 entry->data = acpi_driver_data(device);
1323 entry->owner = THIS_MODULE;
1324 }
1325
1326 return_VALUE(0);
1327 }
1328
1329 static int
1330 acpi_video_bus_remove_fs (
1331 struct acpi_device *device)
1332 {
1333 struct acpi_video_bus *video;
1334
1335 ACPI_FUNCTION_TRACE("acpi_video_bus_remove_fs");
1336
1337 video = (struct acpi_video_bus *) acpi_driver_data(device);
1338
1339 if (acpi_device_dir(device)) {
1340 remove_proc_entry("info", acpi_device_dir(device));
1341 remove_proc_entry("ROM", acpi_device_dir(device));
1342 remove_proc_entry("POST_info", acpi_device_dir(device));
1343 remove_proc_entry("POST", acpi_device_dir(device));
1344 remove_proc_entry("DOS", acpi_device_dir(device));
1345 remove_proc_entry(acpi_device_bid(device),
1346 acpi_video_dir);
1347 acpi_device_dir(device) = NULL;
1348 }
1349
1350 return_VALUE(0);
1351 }
1352
1353 /* --------------------------------------------------------------------------
1354 Driver Interface
1355 -------------------------------------------------------------------------- */
1356
1357 /* device interface */
1358
1359 static int
1360 acpi_video_bus_get_one_device (
1361 struct acpi_device *device,
1362 struct acpi_video_bus *video)
1363 {
1364 unsigned long device_id;
1365 int status, result;
1366 struct acpi_video_device *data;
1367
1368 ACPI_FUNCTION_TRACE("acpi_video_bus_get_one_device");
1369
1370 if (!device || !video)
1371 return_VALUE(-EINVAL);
1372
1373 status = acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1374 if (ACPI_SUCCESS(status)) {
1375
1376 data = kmalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1377 if (!data)
1378 return_VALUE(-ENOMEM);
1379
1380 memset(data, 0, sizeof(struct acpi_video_device));
1381
1382 data->handle = device->handle;
1383 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1384 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1385 acpi_driver_data(device) = data;
1386
1387 data->device_id = device_id;
1388 data->video = video;
1389 data->dev = device;
1390
1391 switch (device_id & 0xffff) {
1392 case 0x0100:
1393 data->flags.crt = 1;
1394 break;
1395 case 0x0400:
1396 data->flags.lcd = 1;
1397 break;
1398 case 0x0200:
1399 data->flags.tvout = 1;
1400 break;
1401 default:
1402 data->flags.unknown = 1;
1403 break;
1404 }
1405
1406 acpi_video_device_bind(video, data);
1407 acpi_video_device_find_cap(data);
1408
1409 status = acpi_install_notify_handler(data->handle,
1410 ACPI_DEVICE_NOTIFY, acpi_video_device_notify, data);
1411 if (ACPI_FAILURE(status)) {
1412 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1413 "Error installing notify handler\n"));
1414 result = -ENODEV;
1415 goto end;
1416 }
1417
1418 down(&video->sem);
1419 list_add_tail(&data->entry, &video->video_device_list);
1420 up(&video->sem);
1421
1422 acpi_video_device_add_fs(device);
1423
1424 return_VALUE(0);
1425 }
1426
1427 end:
1428 return_VALUE(-ENOENT);
1429 }
1430
1431 /*
1432 * Arg:
1433 * video : video bus device
1434 *
1435 * Return:
1436 * none
1437 *
1438 * Enumerate the video device list of the video bus,
1439 * bind the ids with the corresponding video devices
1440 * under the video bus.
1441 */
1442
1443 static void
1444 acpi_video_device_rebind( struct acpi_video_bus *video)
1445 {
1446 struct list_head * node, * next;
1447 list_for_each_safe(node, next, &video->video_device_list) {
1448 struct acpi_video_device * dev = container_of(node, struct acpi_video_device, entry);
1449 acpi_video_device_bind( video, dev);
1450 }
1451 }
1452
1453 /*
1454 * Arg:
1455 * video : video bus device
1456 * device : video output device under the video
1457 * bus
1458 *
1459 * Return:
1460 * none
1461 *
1462 * Bind the ids with the corresponding video devices
1463 * under the video bus.
1464 */
1465
1466 static void
1467 acpi_video_device_bind( struct acpi_video_bus *video,
1468 struct acpi_video_device *device)
1469 {
1470 int i;
1471 ACPI_FUNCTION_TRACE("acpi_video_device_bind");
1472
1473 #define IDS_VAL(i) video->attached_array[i].value.int_val
1474 #define IDS_BIND(i) video->attached_array[i].bind_info
1475
1476 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1477 i < video->attached_count; i++) {
1478 if (device->device_id == (IDS_VAL(i)& 0xffff)) {
1479 IDS_BIND(i) = device;
1480 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1481 }
1482 }
1483 #undef IDS_VAL
1484 #undef IDS_BIND
1485 }
1486
1487 /*
1488 * Arg:
1489 * video : video bus device
1490 *
1491 * Return:
1492 * < 0 : error
1493 *
1494 * Call _DOD to enumerate all devices attached to display adapter
1495 *
1496 */
1497
1498 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1499 {
1500 int status;
1501 int count;
1502 int i;
1503 struct acpi_video_enumerated_device *active_device_list;
1504 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
1505 union acpi_object *dod = NULL;
1506 union acpi_object *obj;
1507
1508 ACPI_FUNCTION_TRACE("acpi_video_device_enumerate");
1509
1510 status = acpi_evaluate_object(video->handle, "_DOD", NULL, &buffer);
1511 if (!ACPI_SUCCESS(status)) {
1512 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _DOD\n"));
1513 return_VALUE(status);
1514 }
1515
1516 dod = (union acpi_object *) buffer.pointer;
1517 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1518 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DOD data\n"));
1519 status = -EFAULT;
1520 goto out;
1521 }
1522
1523 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1524 dod->package.count));
1525
1526 active_device_list= kmalloc(
1527 (1+dod->package.count)*sizeof(struct acpi_video_enumerated_device),
1528 GFP_KERNEL);
1529
1530 if (!active_device_list) {
1531 status = -ENOMEM;
1532 goto out;
1533 }
1534
1535 count = 0;
1536 for (i = 0; i < dod->package.count; i++) {
1537 obj = (union acpi_object *) &dod->package.elements[i];
1538
1539 if (obj->type != ACPI_TYPE_INTEGER) {
1540 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DOD data\n"));
1541 active_device_list[i].value.int_val = ACPI_VIDEO_HEAD_INVALID;
1542 }
1543 active_device_list[i].value.int_val = obj->integer.value;
1544 active_device_list[i].bind_info = NULL;
1545 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, (int) obj->integer.value));
1546 count++;
1547 }
1548 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1549
1550 if(video->attached_array)
1551 kfree(video->attached_array);
1552
1553 video->attached_array = active_device_list;
1554 video->attached_count = count;
1555 out:
1556 acpi_os_free(buffer.pointer);
1557 return_VALUE(status);
1558 }
1559
1560 /*
1561 * Arg:
1562 * video : video bus device
1563 * event : Nontify Event
1564 *
1565 * Return:
1566 * < 0 : error
1567 *
1568 * 1. Find out the current active output device.
1569 * 2. Identify the next output device to switch
1570 * 3. call _DSS to do actual switch.
1571 */
1572
1573 static int
1574 acpi_video_switch_output(
1575 struct acpi_video_bus *video,
1576 int event)
1577 {
1578 struct list_head * node, * next;
1579 struct acpi_video_device *dev=NULL;
1580 struct acpi_video_device *dev_next=NULL;
1581 struct acpi_video_device *dev_prev=NULL;
1582 unsigned long state;
1583 int status = 0;
1584
1585 ACPI_FUNCTION_TRACE("acpi_video_switch_output");
1586
1587 list_for_each_safe(node, next, &video->video_device_list) {
1588 struct acpi_video_device * dev = container_of(node, struct acpi_video_device, entry);
1589 status = acpi_video_device_get_state(dev, &state);
1590 if (state & 0x2){
1591 dev_next = container_of(node->next, struct acpi_video_device, entry);
1592 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1593 goto out;
1594 }
1595 }
1596 dev_next = container_of(node->next, struct acpi_video_device, entry);
1597 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1598 out:
1599 switch (event) {
1600 case ACPI_VIDEO_NOTIFY_CYCLE:
1601 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1602 acpi_video_device_set_state(dev, 0);
1603 acpi_video_device_set_state(dev_next, 0x80000001);
1604 break;
1605 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1606 acpi_video_device_set_state(dev, 0);
1607 acpi_video_device_set_state(dev_prev, 0x80000001);
1608 default:
1609 break;
1610 }
1611
1612 return_VALUE(status);
1613 }
1614
1615 static int
1616 acpi_video_get_next_level(
1617 struct acpi_video_device *device,
1618 u32 level_current,
1619 u32 event)
1620 {
1621 /*Fix me*/
1622 return level_current;
1623 }
1624
1625
1626 static void
1627 acpi_video_switch_brightness (
1628 struct acpi_video_device *device,
1629 int event)
1630 {
1631 unsigned long level_current, level_next;
1632 acpi_video_device_lcd_get_level_current(device, &level_current);
1633 level_next = acpi_video_get_next_level(device, level_current, event);
1634 acpi_video_device_lcd_set_level(device, level_next);
1635 }
1636
1637 static int
1638 acpi_video_bus_get_devices (
1639 struct acpi_video_bus *video,
1640 struct acpi_device *device)
1641 {
1642 int status = 0;
1643 struct list_head *node, *next;
1644
1645 ACPI_FUNCTION_TRACE("acpi_video_get_devices");
1646
1647 acpi_video_device_enumerate(video);
1648
1649 list_for_each_safe(node, next, &device->children) {
1650 struct acpi_device *dev = list_entry(node, struct acpi_device, node);
1651
1652 if (!dev)
1653 continue;
1654
1655 status = acpi_video_bus_get_one_device(dev, video);
1656 if (ACPI_FAILURE(status)) {
1657 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Cant attach device\n"));
1658 continue;
1659 }
1660
1661 }
1662 return_VALUE(status);
1663 }
1664
1665 static int
1666 acpi_video_bus_put_one_device(
1667 struct acpi_video_device *device)
1668 {
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
1683 return_VALUE(0);
1684 }
1685
1686 static int
1687 acpi_video_bus_put_devices (
1688 struct acpi_video_bus *video)
1689 {
1690 int status;
1691 struct list_head *node, *next;
1692
1693 ACPI_FUNCTION_TRACE("acpi_video_bus_put_devices");
1694
1695 list_for_each_safe(node, next, &video->video_device_list) {
1696 struct acpi_video_device *data = list_entry(node, struct acpi_video_device, entry);
1697 if (!data)
1698 continue;
1699
1700 status = acpi_video_bus_put_one_device(data);
1701 if(ACPI_FAILURE(status))
1702 printk(KERN_WARNING PREFIX "hhuuhhuu bug in acpi video driver.\n");
1703
1704 if (data->brightness)
1705 kfree(data->brightness);
1706
1707 kfree(data);
1708 }
1709
1710 return_VALUE(0);
1711 }
1712
1713 /* acpi_video interface */
1714
1715 static int
1716 acpi_video_bus_start_devices(
1717 struct acpi_video_bus *video)
1718 {
1719 return acpi_video_bus_DOS(video, 1, 0);
1720 }
1721
1722 static int
1723 acpi_video_bus_stop_devices(
1724 struct acpi_video_bus *video)
1725 {
1726 return acpi_video_bus_DOS(video, 0, 1);
1727 }
1728
1729 static void
1730 acpi_video_bus_notify (
1731 acpi_handle handle,
1732 u32 event,
1733 void *data)
1734 {
1735 struct acpi_video_bus *video = (struct acpi_video_bus *) data;
1736 struct acpi_device *device = NULL;
1737
1738 ACPI_FUNCTION_TRACE("acpi_video_bus_notify");
1739 printk("video bus notify\n");
1740
1741 if (!video)
1742 return_VOID;
1743
1744 if (acpi_bus_get_device(handle, &device))
1745 return_VOID;
1746
1747 switch (event) {
1748 case ACPI_VIDEO_NOTIFY_SWITCH: /* User request that a switch occur,
1749 * most likely via hotkey. */
1750 acpi_bus_generate_event(device, event, 0);
1751 break;
1752
1753 case ACPI_VIDEO_NOTIFY_PROBE: /* User plug or remove a video
1754 * connector. */
1755 acpi_video_device_enumerate(video);
1756 acpi_video_device_rebind(video);
1757 acpi_video_switch_output(video, event);
1758 acpi_bus_generate_event(device, event, 0);
1759 break;
1760
1761 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed.*/
1762 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1763 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1764 acpi_video_switch_output(video, event);
1765 acpi_bus_generate_event(device, event, 0);
1766 break;
1767
1768 default:
1769 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1770 "Unsupported event [0x%x]\n", event));
1771 break;
1772 }
1773
1774 return_VOID;
1775 }
1776
1777 static void
1778 acpi_video_device_notify (
1779 acpi_handle handle,
1780 u32 event,
1781 void *data)
1782 {
1783 struct acpi_video_device *video_device = (struct acpi_video_device *) data;
1784 struct acpi_device *device = NULL;
1785
1786 ACPI_FUNCTION_TRACE("acpi_video_device_notify");
1787
1788 printk("video device notify\n");
1789 if (!video_device)
1790 return_VOID;
1791
1792 if (acpi_bus_get_device(handle, &device))
1793 return_VOID;
1794
1795 switch (event) {
1796 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1797 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1798 acpi_bus_generate_event(device, event, 0);
1799 break;
1800 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1801 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1802 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1803 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1804 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1805 acpi_video_switch_brightness (video_device, event);
1806 acpi_bus_generate_event(device, event, 0);
1807 break;
1808 default:
1809 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1810 "Unsupported event [0x%x]\n", event));
1811 break;
1812 }
1813 return_VOID;
1814 }
1815
1816 static int
1817 acpi_video_bus_add (
1818 struct acpi_device *device)
1819 {
1820 int result = 0;
1821 acpi_status status = 0;
1822 struct acpi_video_bus *video = NULL;
1823
1824 ACPI_FUNCTION_TRACE("acpi_video_bus_add");
1825
1826 if (!device)
1827 return_VALUE(-EINVAL);
1828
1829 video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1830 if (!video)
1831 return_VALUE(-ENOMEM);
1832 memset(video, 0, sizeof(struct acpi_video_bus));
1833
1834 video->handle = device->handle;
1835 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1836 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1837 acpi_driver_data(device) = video;
1838
1839 acpi_video_bus_find_cap(video);
1840 result = acpi_video_bus_check(video);
1841 if (result)
1842 goto end;
1843
1844 result = acpi_video_bus_add_fs(device);
1845 if (result)
1846 goto end;
1847
1848 init_MUTEX(&video->sem);
1849 INIT_LIST_HEAD(&video->video_device_list);
1850
1851 acpi_video_bus_get_devices(video, device);
1852 acpi_video_bus_start_devices(video);
1853
1854 status = acpi_install_notify_handler(video->handle,
1855 ACPI_DEVICE_NOTIFY, acpi_video_bus_notify, video);
1856 if (ACPI_FAILURE(status)) {
1857 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1858 "Error installing notify handler\n"));
1859 result = -ENODEV;
1860 goto end;
1861 }
1862
1863 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1864 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1865 video->flags.multihead ? "yes":"no",
1866 video->flags.rom ? "yes":"no",
1867 video->flags.post ? "yes":"no");
1868
1869 end:
1870 if (result) {
1871 acpi_video_bus_remove_fs(device);
1872 kfree(video);
1873 }
1874
1875 return_VALUE(result);
1876 }
1877
1878 static int
1879 acpi_video_bus_remove (
1880 struct acpi_device *device,
1881 int type)
1882 {
1883 acpi_status status = 0;
1884 struct acpi_video_bus *video = NULL;
1885
1886 ACPI_FUNCTION_TRACE("acpi_video_bus_remove");
1887
1888 if (!device || !acpi_driver_data(device))
1889 return_VALUE(-EINVAL);
1890
1891 video = (struct acpi_video_bus *) acpi_driver_data(device);
1892
1893 acpi_video_bus_stop_devices(video);
1894
1895 status = acpi_remove_notify_handler(video->handle,
1896 ACPI_DEVICE_NOTIFY, acpi_video_bus_notify);
1897 if (ACPI_FAILURE(status))
1898 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1899 "Error removing notify handler\n"));
1900
1901 acpi_video_bus_put_devices(video);
1902 acpi_video_bus_remove_fs(device);
1903
1904 if (video->attached_array)
1905 kfree(video->attached_array);
1906 kfree(video);
1907
1908 return_VALUE(0);
1909 }
1910
1911
1912 static int
1913 acpi_video_bus_match (
1914 struct acpi_device *device,
1915 struct acpi_driver *driver)
1916 {
1917 acpi_handle h_dummy1;
1918 acpi_handle h_dummy2;
1919 acpi_handle h_dummy3;
1920
1921 ACPI_FUNCTION_TRACE("acpi_video_bus_match");
1922
1923 if (!device || !driver)
1924 return_VALUE(-EINVAL);
1925
1926 /* Since there is no HID, CID for ACPI Video drivers, we have
1927 * to check well known required nodes for each feature we support.
1928 */
1929
1930 /* Does this device able to support video switching ? */
1931 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
1932 ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
1933 return_VALUE(0);
1934
1935 /* Does this device able to retrieve a video ROM ? */
1936 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
1937 return_VALUE(0);
1938
1939 /* Does this device able to configure which video head to be POSTed ? */
1940 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
1941 ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
1942 ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
1943 return_VALUE(0);
1944
1945
1946 return_VALUE(-ENODEV);
1947 }
1948
1949
1950 static int __init
1951 acpi_video_init (void)
1952 {
1953 int result = 0;
1954
1955 ACPI_FUNCTION_TRACE("acpi_video_init");
1956
1957 /*
1958 acpi_dbg_level = 0xFFFFFFFF;
1959 acpi_dbg_layer = 0x08000000;
1960 */
1961
1962 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1963 if (!acpi_video_dir)
1964 return_VALUE(-ENODEV);
1965 acpi_video_dir->owner = THIS_MODULE;
1966
1967 result = acpi_bus_register_driver(&acpi_video_bus);
1968 if (result < 0) {
1969 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1970 return_VALUE(-ENODEV);
1971 }
1972
1973 return_VALUE(0);
1974 }
1975
1976 static void __exit
1977 acpi_video_exit (void)
1978 {
1979 ACPI_FUNCTION_TRACE("acpi_video_exit");
1980
1981 acpi_bus_unregister_driver(&acpi_video_bus);
1982
1983 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1984
1985 return_VOID;
1986 }
1987
1988 module_init(acpi_video_init);
1989 module_exit(acpi_video_exit);
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