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Merge by hand (conflicts in sd.c)
[linux-2.6.22.y-op.git] / drivers / acpi / video.c
blob2cf264fd52e072e42fcff07b9cc6c948c9cbbede
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 *
573 sizeof *(br->levels), GFP_KERNEL);
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 }
586 out:
587 if (count < 2) {
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 kfree(obj);
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
613 static void
614 acpi_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
644 static int
645 acpi_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
685 static struct proc_dir_entry *acpi_video_dir;
686
687 /* video devices */
688
689 static int
690 acpi_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
715 end:
716 return_VALUE(0);
717 }
718
719 static int
720 acpi_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
728 static int
729 acpi_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
756 end:
757 return_VALUE(0);
758 }
759
760 static int
761 acpi_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
769 static ssize_t
770 acpi_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
802 static int
803 acpi_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
825 static int
826 acpi_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
834 static ssize_t
835 acpi_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
872 static int
873 acpi_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
901 out:
902 if (!edid)
903 seq_printf(seq, "<not supported>\n");
904 else
905 kfree(edid);
906
907 return_VALUE(0);
908 }
909
910 static int
911 acpi_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
920 static int
921 acpi_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
993 static int
994 acpi_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 */
1019 static int
1020 acpi_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
1038 end:
1039 return_VALUE(0);
1040 }
1041
1042 static int
1043 acpi_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
1050 static int
1051 acpi_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
1065 end:
1066 return_VALUE(0);
1067 }
1068
1069 static int
1070 acpi_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
1077 static int
1078 acpi_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");
1106 end:
1107 return_VALUE(0);
1108 }
1109
1110 static int
1111 acpi_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
1118 static int
1119 acpi_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
1139 end:
1140 return_VALUE(0);
1141 }
1142
1143 static int
1144 acpi_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
1157 static int
1158 acpi_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
1165 static int
1166 acpi_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
1173 static ssize_t
1174 acpi_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
1218 static ssize_t
1219 acpi_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
1253 static int
1254 acpi_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
1328 static int
1329 acpi_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
1358 static int
1359 acpi_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
1426 end:
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
1442 static void
1443 acpi_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
1465 static void
1466 acpi_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
1497 static 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;
1554 out:
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
1572 static int
1573 acpi_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) {
1587 dev = container_of(node, struct acpi_video_device, entry);
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);
1597 out:
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
1614 static int
1615 acpi_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
1625 static void
1626 acpi_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
1636 static int
1637 acpi_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
1664 static int
1665 acpi_video_bus_put_one_device(
1666 struct acpi_video_device *device)
1667 {
1668 struct acpi_video_bus *video;
1669
1670 ACPI_FUNCTION_TRACE("acpi_video_bus_put_one_device");
1671
1672 if (!device || !device->video)
1673 return_VALUE(-ENOENT);
1674
1675 video = device->video;
1676
1677 down(&video->sem);
1678 list_del(&device->entry);
1679 up(&video->sem);
1680 acpi_video_device_remove_fs(device->dev);
1681
1682 return_VALUE(0);
1683 }
1684
1685 static int
1686 acpi_video_bus_put_devices (
1687 struct acpi_video_bus *video)
1688 {
1689 int status;
1690 struct list_head *node, *next;
1691
1692 ACPI_FUNCTION_TRACE("acpi_video_bus_put_devices");
1693
1694 list_for_each_safe(node, next, &video->video_device_list) {
1695 struct acpi_video_device *data = list_entry(node, struct acpi_video_device, entry);
1696 if (!data)
1697 continue;
1698
1699 status = acpi_video_bus_put_one_device(data);
1700 if(ACPI_FAILURE(status))
1701 printk(KERN_WARNING PREFIX "hhuuhhuu bug in acpi video driver.\n");
1702
1703 if (data->brightness)
1704 kfree(data->brightness);
1705
1706 kfree(data);
1707 }
1708
1709 return_VALUE(0);
1710 }
1711
1712 /* acpi_video interface */
1713
1714 static int
1715 acpi_video_bus_start_devices(
1716 struct acpi_video_bus *video)
1717 {
1718 return acpi_video_bus_DOS(video, 1, 0);
1719 }
1720
1721 static int
1722 acpi_video_bus_stop_devices(
1723 struct acpi_video_bus *video)
1724 {
1725 return acpi_video_bus_DOS(video, 0, 1);
1726 }
1727
1728 static void
1729 acpi_video_bus_notify (
1730 acpi_handle handle,
1731 u32 event,
1732 void *data)
1733 {
1734 struct acpi_video_bus *video = (struct acpi_video_bus *) data;
1735 struct acpi_device *device = NULL;
1736
1737 ACPI_FUNCTION_TRACE("acpi_video_bus_notify");
1738 printk("video bus notify\n");
1739
1740 if (!video)
1741 return_VOID;
1742
1743 if (acpi_bus_get_device(handle, &device))
1744 return_VOID;
1745
1746 switch (event) {
1747 case ACPI_VIDEO_NOTIFY_SWITCH: /* User request that a switch occur,
1748 * most likely via hotkey. */
1749 acpi_bus_generate_event(device, event, 0);
1750 break;
1751
1752 case ACPI_VIDEO_NOTIFY_PROBE: /* User plug or remove a video
1753 * connector. */
1754 acpi_video_device_enumerate(video);
1755 acpi_video_device_rebind(video);
1756 acpi_video_switch_output(video, event);
1757 acpi_bus_generate_event(device, event, 0);
1758 break;
1759
1760 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed.*/
1761 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1762 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1763 acpi_video_switch_output(video, event);
1764 acpi_bus_generate_event(device, event, 0);
1765 break;
1766
1767 default:
1768 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1769 "Unsupported event [0x%x]\n", event));
1770 break;
1771 }
1772
1773 return_VOID;
1774 }
1775
1776 static void
1777 acpi_video_device_notify (
1778 acpi_handle handle,
1779 u32 event,
1780 void *data)
1781 {
1782 struct acpi_video_device *video_device = (struct acpi_video_device *) data;
1783 struct acpi_device *device = NULL;
1784
1785 ACPI_FUNCTION_TRACE("acpi_video_device_notify");
1786
1787 printk("video device notify\n");
1788 if (!video_device)
1789 return_VOID;
1790
1791 if (acpi_bus_get_device(handle, &device))
1792 return_VOID;
1793
1794 switch (event) {
1795 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1796 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1797 acpi_bus_generate_event(device, event, 0);
1798 break;
1799 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1800 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1801 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1802 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1803 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1804 acpi_video_switch_brightness (video_device, event);
1805 acpi_bus_generate_event(device, event, 0);
1806 break;
1807 default:
1808 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1809 "Unsupported event [0x%x]\n", event));
1810 break;
1811 }
1812 return_VOID;
1813 }
1814
1815 static int
1816 acpi_video_bus_add (
1817 struct acpi_device *device)
1818 {
1819 int result = 0;
1820 acpi_status status = 0;
1821 struct acpi_video_bus *video = NULL;
1822
1823 ACPI_FUNCTION_TRACE("acpi_video_bus_add");
1824
1825 if (!device)
1826 return_VALUE(-EINVAL);
1827
1828 video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1829 if (!video)
1830 return_VALUE(-ENOMEM);
1831 memset(video, 0, sizeof(struct acpi_video_bus));
1832
1833 video->handle = device->handle;
1834 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1835 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1836 acpi_driver_data(device) = video;
1837
1838 acpi_video_bus_find_cap(video);
1839 result = acpi_video_bus_check(video);
1840 if (result)
1841 goto end;
1842
1843 result = acpi_video_bus_add_fs(device);
1844 if (result)
1845 goto end;
1846
1847 init_MUTEX(&video->sem);
1848 INIT_LIST_HEAD(&video->video_device_list);
1849
1850 acpi_video_bus_get_devices(video, device);
1851 acpi_video_bus_start_devices(video);
1852
1853 status = acpi_install_notify_handler(video->handle,
1854 ACPI_DEVICE_NOTIFY, acpi_video_bus_notify, video);
1855 if (ACPI_FAILURE(status)) {
1856 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1857 "Error installing notify handler\n"));
1858 result = -ENODEV;
1859 goto end;
1860 }
1861
1862 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1863 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1864 video->flags.multihead ? "yes":"no",
1865 video->flags.rom ? "yes":"no",
1866 video->flags.post ? "yes":"no");
1867
1868 end:
1869 if (result) {
1870 acpi_video_bus_remove_fs(device);
1871 kfree(video);
1872 }
1873
1874 return_VALUE(result);
1875 }
1876
1877 static int
1878 acpi_video_bus_remove (
1879 struct acpi_device *device,
1880 int type)
1881 {
1882 acpi_status status = 0;
1883 struct acpi_video_bus *video = NULL;
1884
1885 ACPI_FUNCTION_TRACE("acpi_video_bus_remove");
1886
1887 if (!device || !acpi_driver_data(device))
1888 return_VALUE(-EINVAL);
1889
1890 video = (struct acpi_video_bus *) acpi_driver_data(device);
1891
1892 acpi_video_bus_stop_devices(video);
1893
1894 status = acpi_remove_notify_handler(video->handle,
1895 ACPI_DEVICE_NOTIFY, acpi_video_bus_notify);
1896 if (ACPI_FAILURE(status))
1897 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1898 "Error removing notify handler\n"));
1899
1900 acpi_video_bus_put_devices(video);
1901 acpi_video_bus_remove_fs(device);
1902
1903 if (video->attached_array)
1904 kfree(video->attached_array);
1905 kfree(video);
1906
1907 return_VALUE(0);
1908 }
1909
1910
1911 static int
1912 acpi_video_bus_match (
1913 struct acpi_device *device,
1914 struct acpi_driver *driver)
1915 {
1916 acpi_handle h_dummy1;
1917 acpi_handle h_dummy2;
1918 acpi_handle h_dummy3;
1919
1920 ACPI_FUNCTION_TRACE("acpi_video_bus_match");
1921
1922 if (!device || !driver)
1923 return_VALUE(-EINVAL);
1924
1925 /* Since there is no HID, CID for ACPI Video drivers, we have
1926 * to check well known required nodes for each feature we support.
1927 */
1928
1929 /* Does this device able to support video switching ? */
1930 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
1931 ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
1932 return_VALUE(0);
1933
1934 /* Does this device able to retrieve a video ROM ? */
1935 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
1936 return_VALUE(0);
1937
1938 /* Does this device able to configure which video head to be POSTed ? */
1939 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
1940 ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
1941 ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
1942 return_VALUE(0);
1943
1944
1945 return_VALUE(-ENODEV);
1946 }
1947
1948
1949 static int __init
1950 acpi_video_init (void)
1951 {
1952 int result = 0;
1953
1954 ACPI_FUNCTION_TRACE("acpi_video_init");
1955
1956 /*
1957 acpi_dbg_level = 0xFFFFFFFF;
1958 acpi_dbg_layer = 0x08000000;
1959 */
1960
1961 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1962 if (!acpi_video_dir)
1963 return_VALUE(-ENODEV);
1964 acpi_video_dir->owner = THIS_MODULE;
1965
1966 result = acpi_bus_register_driver(&acpi_video_bus);
1967 if (result < 0) {
1968 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1969 return_VALUE(-ENODEV);
1970 }
1971
1972 return_VALUE(0);
1973 }
1974
1975 static void __exit
1976 acpi_video_exit (void)
1977 {
1978 ACPI_FUNCTION_TRACE("acpi_video_exit");
1979
1980 acpi_bus_unregister_driver(&acpi_video_bus);
1981
1982 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1983
1984 return_VOID;
1985 }
1986
1987 module_init(acpi_video_init);
1988 module_exit(acpi_video_exit);
linux v2.6.22.y-op