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ACPI: asus_acpi: support A3G
[deliverable/linux.git] / drivers / acpi / video.c
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 *
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 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
57 #define ACPI_VIDEO_HEAD_END (~0u)
58
59 #define _COMPONENT ACPI_VIDEO_COMPONENT
60 ACPI_MODULE_NAME("acpi_video")
61
62 MODULE_AUTHOR("Bruno Ducrot");
63 MODULE_DESCRIPTION(ACPI_VIDEO_DRIVER_NAME);
64 MODULE_LICENSE("GPL");
65
66 static int acpi_video_bus_add(struct acpi_device *device);
67 static int acpi_video_bus_remove(struct acpi_device *device, int type);
68 static int acpi_video_bus_match(struct acpi_device *device,
69 struct acpi_driver *driver);
70
71 static struct acpi_driver acpi_video_bus = {
72 .name = ACPI_VIDEO_DRIVER_NAME,
73 .class = ACPI_VIDEO_CLASS,
74 .ops = {
75 .add = acpi_video_bus_add,
76 .remove = acpi_video_bus_remove,
77 .match = acpi_video_bus_match,
78 },
79 };
80
81 struct acpi_video_bus_flags {
82 u8 multihead:1; /* can switch video heads */
83 u8 rom:1; /* can retrieve a video rom */
84 u8 post:1; /* can configure the head to */
85 u8 reserved:5;
86 };
87
88 struct acpi_video_bus_cap {
89 u8 _DOS:1; /*Enable/Disable output switching */
90 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
91 u8 _ROM:1; /*Get ROM Data */
92 u8 _GPD:1; /*Get POST Device */
93 u8 _SPD:1; /*Set POST Device */
94 u8 _VPO:1; /*Video POST Options */
95 u8 reserved:2;
96 };
97
98 struct acpi_video_device_attrib {
99 u32 display_index:4; /* A zero-based instance of the Display */
100 u32 display_port_attachment:4; /*This field differenates displays type */
101 u32 display_type:4; /*Describe the specific type in use */
102 u32 vendor_specific:4; /*Chipset Vendor Specifi */
103 u32 bios_can_detect:1; /*BIOS can detect the device */
104 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
105 the VGA device. */
106 u32 pipe_id:3; /*For VGA multiple-head devices. */
107 u32 reserved:10; /*Must be 0 */
108 u32 device_id_scheme:1; /*Device ID Scheme */
109 };
110
111 struct acpi_video_enumerated_device {
112 union {
113 u32 int_val;
114 struct acpi_video_device_attrib attrib;
115 } value;
116 struct acpi_video_device *bind_info;
117 };
118
119 struct acpi_video_bus {
120 acpi_handle handle;
121 u8 dos_setting;
122 struct acpi_video_enumerated_device *attached_array;
123 u8 attached_count;
124 struct acpi_video_bus_cap cap;
125 struct acpi_video_bus_flags flags;
126 struct semaphore sem;
127 struct list_head video_device_list;
128 struct proc_dir_entry *dir;
129 };
130
131 struct acpi_video_device_flags {
132 u8 crt:1;
133 u8 lcd:1;
134 u8 tvout:1;
135 u8 bios:1;
136 u8 unknown:1;
137 u8 reserved:3;
138 };
139
140 struct acpi_video_device_cap {
141 u8 _ADR:1; /*Return the unique ID */
142 u8 _BCL:1; /*Query list of brightness control levels supported */
143 u8 _BCM:1; /*Set the brightness level */
144 u8 _DDC:1; /*Return the EDID for this device */
145 u8 _DCS:1; /*Return status of output device */
146 u8 _DGS:1; /*Query graphics state */
147 u8 _DSS:1; /*Device state set */
148 u8 _reserved:1;
149 };
150
151 struct acpi_video_device_brightness {
152 int curr;
153 int count;
154 int *levels;
155 };
156
157 struct acpi_video_device {
158 acpi_handle handle;
159 unsigned long device_id;
160 struct acpi_video_device_flags flags;
161 struct acpi_video_device_cap cap;
162 struct list_head entry;
163 struct acpi_video_bus *video;
164 struct acpi_device *dev;
165 struct acpi_video_device_brightness *brightness;
166 };
167
168 /* bus */
169 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
170 static struct file_operations acpi_video_bus_info_fops = {
171 .open = acpi_video_bus_info_open_fs,
172 .read = seq_read,
173 .llseek = seq_lseek,
174 .release = single_release,
175 };
176
177 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
178 static struct file_operations acpi_video_bus_ROM_fops = {
179 .open = acpi_video_bus_ROM_open_fs,
180 .read = seq_read,
181 .llseek = seq_lseek,
182 .release = single_release,
183 };
184
185 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
186 struct file *file);
187 static struct file_operations acpi_video_bus_POST_info_fops = {
188 .open = acpi_video_bus_POST_info_open_fs,
189 .read = seq_read,
190 .llseek = seq_lseek,
191 .release = single_release,
192 };
193
194 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
195 static struct file_operations acpi_video_bus_POST_fops = {
196 .open = acpi_video_bus_POST_open_fs,
197 .read = seq_read,
198 .llseek = seq_lseek,
199 .release = single_release,
200 };
201
202 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
203 static struct file_operations acpi_video_bus_DOS_fops = {
204 .open = acpi_video_bus_DOS_open_fs,
205 .read = seq_read,
206 .llseek = seq_lseek,
207 .release = single_release,
208 };
209
210 /* device */
211 static int acpi_video_device_info_open_fs(struct inode *inode,
212 struct file *file);
213 static struct file_operations acpi_video_device_info_fops = {
214 .open = acpi_video_device_info_open_fs,
215 .read = seq_read,
216 .llseek = seq_lseek,
217 .release = single_release,
218 };
219
220 static int acpi_video_device_state_open_fs(struct inode *inode,
221 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,
230 struct file *file);
231 static struct file_operations acpi_video_device_brightness_fops = {
232 .open = acpi_video_device_brightness_open_fs,
233 .read = seq_read,
234 .llseek = seq_lseek,
235 .release = single_release,
236 };
237
238 static int acpi_video_device_EDID_open_fs(struct inode *inode,
239 struct file *file);
240 static struct file_operations acpi_video_device_EDID_fops = {
241 .open = acpi_video_device_EDID_open_fs,
242 .read = seq_read,
243 .llseek = seq_lseek,
244 .release = single_release,
245 };
246
247 static char device_decode[][30] = {
248 "motherboard VGA device",
249 "PCI VGA device",
250 "AGP VGA device",
251 "UNKNOWN",
252 };
253
254 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
255 static void acpi_video_device_rebind(struct acpi_video_bus *video);
256 static void acpi_video_device_bind(struct acpi_video_bus *video,
257 struct acpi_video_device *device);
258 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
259 static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
260 static int acpi_video_get_next_level(struct acpi_video_device *device,
261 u32 level_current, u32 event);
262 static void acpi_video_switch_brightness(struct acpi_video_device *device,
263 int event);
264
265 /* --------------------------------------------------------------------------
266 Video Management
267 -------------------------------------------------------------------------- */
268
269 /* device */
270
271 static int
272 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
273 {
274 int status;
275 status = acpi_evaluate_integer(device->handle, "_DGS", NULL, state);
276
277 return status;
278 }
279
280 static int
281 acpi_video_device_get_state(struct acpi_video_device *device,
282 unsigned long *state)
283 {
284 int status;
285
286
287 status = acpi_evaluate_integer(device->handle, "_DCS", NULL, state);
288
289 return status;
290 }
291
292 static int
293 acpi_video_device_set_state(struct acpi_video_device *device, int state)
294 {
295 int status;
296 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
297 struct acpi_object_list args = { 1, &arg0 };
298 unsigned long ret;
299
300
301 arg0.integer.value = state;
302 status = acpi_evaluate_integer(device->handle, "_DSS", &args, &ret);
303
304 return status;
305 }
306
307 static int
308 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
309 union acpi_object **levels)
310 {
311 int status;
312 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
313 union acpi_object *obj;
314
315
316 *levels = NULL;
317
318 status = acpi_evaluate_object(device->handle, "_BCL", NULL, &buffer);
319 if (!ACPI_SUCCESS(status))
320 return status;
321 obj = (union acpi_object *)buffer.pointer;
322 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
323 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
324 status = -EFAULT;
325 goto err;
326 }
327
328 *levels = obj;
329
330 return 0;
331
332 err:
333 kfree(buffer.pointer);
334
335 return status;
336 }
337
338 static int
339 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
340 {
341 int status;
342 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
343 struct acpi_object_list args = { 1, &arg0 };
344
345
346 arg0.integer.value = level;
347 status = acpi_evaluate_object(device->handle, "_BCM", &args, NULL);
348
349 printk(KERN_DEBUG "set_level status: %x\n", status);
350 return status;
351 }
352
353 static int
354 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
355 unsigned long *level)
356 {
357 int status;
358
359 status = acpi_evaluate_integer(device->handle, "_BQC", NULL, level);
360
361 return status;
362 }
363
364 static int
365 acpi_video_device_EDID(struct acpi_video_device *device,
366 union acpi_object **edid, ssize_t length)
367 {
368 int status;
369 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
370 union acpi_object *obj;
371 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
372 struct acpi_object_list args = { 1, &arg0 };
373
374
375 *edid = NULL;
376
377 if (!device)
378 return -ENODEV;
379 if (length == 128)
380 arg0.integer.value = 1;
381 else if (length == 256)
382 arg0.integer.value = 2;
383 else
384 return -EINVAL;
385
386 status = acpi_evaluate_object(device->handle, "_DDC", &args, &buffer);
387 if (ACPI_FAILURE(status))
388 return -ENODEV;
389
390 obj = (union acpi_object *)buffer.pointer;
391
392 if (obj && obj->type == ACPI_TYPE_BUFFER)
393 *edid = obj;
394 else {
395 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
396 status = -EFAULT;
397 kfree(obj);
398 }
399
400 return status;
401 }
402
403 /* bus */
404
405 static int
406 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
407 {
408 int status;
409 unsigned long tmp;
410 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
411 struct acpi_object_list args = { 1, &arg0 };
412
413
414 arg0.integer.value = option;
415
416 status = acpi_evaluate_integer(video->handle, "_SPD", &args, &tmp);
417 if (ACPI_SUCCESS(status))
418 status = tmp ? (-EINVAL) : (AE_OK);
419
420 return status;
421 }
422
423 static int
424 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
425 {
426 int status;
427
428
429 status = acpi_evaluate_integer(video->handle, "_GPD", NULL, id);
430
431 return status;
432 }
433
434 static int
435 acpi_video_bus_POST_options(struct acpi_video_bus *video,
436 unsigned long *options)
437 {
438 int status;
439
440 status = acpi_evaluate_integer(video->handle, "_VPO", NULL, options);
441 *options &= 3;
442
443 return status;
444 }
445
446 /*
447 * Arg:
448 * video : video bus device pointer
449 * bios_flag :
450 * 0. The system BIOS should NOT automatically switch(toggle)
451 * the active display output.
452 * 1. The system BIOS should automatically switch (toggle) the
453 * active display output. No swich event.
454 * 2. The _DGS value should be locked.
455 * 3. The system BIOS should not automatically switch (toggle) the
456 * active display output, but instead generate the display switch
457 * event notify code.
458 * lcd_flag :
459 * 0. The system BIOS should automatically control the brightness level
460 * of the LCD, when the power changes from AC to DC
461 * 1. The system BIOS should NOT automatically control the brightness
462 * level of the LCD, when the power changes from AC to DC.
463 * Return Value:
464 * -1 wrong arg.
465 */
466
467 static int
468 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
469 {
470 acpi_integer status = 0;
471 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
472 struct acpi_object_list args = { 1, &arg0 };
473
474
475 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
476 status = -1;
477 goto Failed;
478 }
479 arg0.integer.value = (lcd_flag << 2) | bios_flag;
480 video->dos_setting = arg0.integer.value;
481 acpi_evaluate_object(video->handle, "_DOS", &args, NULL);
482
483 Failed:
484 return status;
485 }
486
487 /*
488 * Arg:
489 * device : video output device (LCD, CRT, ..)
490 *
491 * Return Value:
492 * None
493 *
494 * Find out all required AML method defined under the output
495 * device.
496 */
497
498 static void acpi_video_device_find_cap(struct acpi_video_device *device)
499 {
500 acpi_integer status;
501 acpi_handle h_dummy1;
502 int i;
503 union acpi_object *obj = NULL;
504 struct acpi_video_device_brightness *br = NULL;
505
506
507 memset(&device->cap, 0, 4);
508
509 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ADR", &h_dummy1))) {
510 device->cap._ADR = 1;
511 }
512 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCL", &h_dummy1))) {
513 device->cap._BCL = 1;
514 }
515 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCM", &h_dummy1))) {
516 device->cap._BCM = 1;
517 }
518 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DDC", &h_dummy1))) {
519 device->cap._DDC = 1;
520 }
521 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DCS", &h_dummy1))) {
522 device->cap._DCS = 1;
523 }
524 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DGS", &h_dummy1))) {
525 device->cap._DGS = 1;
526 }
527 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DSS", &h_dummy1))) {
528 device->cap._DSS = 1;
529 }
530
531 status = acpi_video_device_lcd_query_levels(device, &obj);
532
533 if (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
534 int count = 0;
535 union acpi_object *o;
536
537 br = kmalloc(sizeof(*br), GFP_KERNEL);
538 if (!br) {
539 printk(KERN_ERR "can't allocate memory\n");
540 } else {
541 memset(br, 0, sizeof(*br));
542 br->levels = kmalloc(obj->package.count *
543 sizeof *(br->levels), GFP_KERNEL);
544 if (!br->levels)
545 goto out;
546
547 for (i = 0; i < obj->package.count; i++) {
548 o = (union acpi_object *)&obj->package.
549 elements[i];
550 if (o->type != ACPI_TYPE_INTEGER) {
551 printk(KERN_ERR PREFIX "Invalid data\n");
552 continue;
553 }
554 br->levels[count] = (u32) o->integer.value;
555 count++;
556 }
557 out:
558 if (count < 2) {
559 kfree(br->levels);
560 kfree(br);
561 } else {
562 br->count = count;
563 device->brightness = br;
564 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
565 "found %d brightness levels\n",
566 count));
567 }
568 }
569 }
570
571 kfree(obj);
572
573 return;
574 }
575
576 /*
577 * Arg:
578 * device : video output device (VGA)
579 *
580 * Return Value:
581 * None
582 *
583 * Find out all required AML method defined under the video bus device.
584 */
585
586 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
587 {
588 acpi_handle h_dummy1;
589
590 memset(&video->cap, 0, 4);
591 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOS", &h_dummy1))) {
592 video->cap._DOS = 1;
593 }
594 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOD", &h_dummy1))) {
595 video->cap._DOD = 1;
596 }
597 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_ROM", &h_dummy1))) {
598 video->cap._ROM = 1;
599 }
600 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_GPD", &h_dummy1))) {
601 video->cap._GPD = 1;
602 }
603 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_SPD", &h_dummy1))) {
604 video->cap._SPD = 1;
605 }
606 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_VPO", &h_dummy1))) {
607 video->cap._VPO = 1;
608 }
609 }
610
611 /*
612 * Check whether the video bus device has required AML method to
613 * support the desired features
614 */
615
616 static int acpi_video_bus_check(struct acpi_video_bus *video)
617 {
618 acpi_status status = -ENOENT;
619
620
621 if (!video)
622 return -EINVAL;
623
624 /* Since there is no HID, CID and so on for VGA driver, we have
625 * to check well known required nodes.
626 */
627
628 /* Does this device able to support video switching ? */
629 if (video->cap._DOS) {
630 video->flags.multihead = 1;
631 status = 0;
632 }
633
634 /* Does this device able to retrieve a retrieve a video ROM ? */
635 if (video->cap._ROM) {
636 video->flags.rom = 1;
637 status = 0;
638 }
639
640 /* Does this device able to configure which video device to POST ? */
641 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
642 video->flags.post = 1;
643 status = 0;
644 }
645
646 return status;
647 }
648
649 /* --------------------------------------------------------------------------
650 FS Interface (/proc)
651 -------------------------------------------------------------------------- */
652
653 static struct proc_dir_entry *acpi_video_dir;
654
655 /* video devices */
656
657 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
658 {
659 struct acpi_video_device *dev =
660 (struct acpi_video_device *)seq->private;
661
662
663 if (!dev)
664 goto end;
665
666 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
667 seq_printf(seq, "type: ");
668 if (dev->flags.crt)
669 seq_printf(seq, "CRT\n");
670 else if (dev->flags.lcd)
671 seq_printf(seq, "LCD\n");
672 else if (dev->flags.tvout)
673 seq_printf(seq, "TVOUT\n");
674 else
675 seq_printf(seq, "UNKNOWN\n");
676
677 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
678
679 end:
680 return 0;
681 }
682
683 static int
684 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
685 {
686 return single_open(file, acpi_video_device_info_seq_show,
687 PDE(inode)->data);
688 }
689
690 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
691 {
692 int status;
693 struct acpi_video_device *dev =
694 (struct acpi_video_device *)seq->private;
695 unsigned long state;
696
697
698 if (!dev)
699 goto end;
700
701 status = acpi_video_device_get_state(dev, &state);
702 seq_printf(seq, "state: ");
703 if (ACPI_SUCCESS(status))
704 seq_printf(seq, "0x%02lx\n", state);
705 else
706 seq_printf(seq, "<not supported>\n");
707
708 status = acpi_video_device_query(dev, &state);
709 seq_printf(seq, "query: ");
710 if (ACPI_SUCCESS(status))
711 seq_printf(seq, "0x%02lx\n", state);
712 else
713 seq_printf(seq, "<not supported>\n");
714
715 end:
716 return 0;
717 }
718
719 static int
720 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
721 {
722 return single_open(file, acpi_video_device_state_seq_show,
723 PDE(inode)->data);
724 }
725
726 static ssize_t
727 acpi_video_device_write_state(struct file *file,
728 const char __user * buffer,
729 size_t count, loff_t * data)
730 {
731 int status;
732 struct seq_file *m = (struct seq_file *)file->private_data;
733 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
734 char str[12] = { 0 };
735 u32 state = 0;
736
737
738 if (!dev || count + 1 > sizeof str)
739 return -EINVAL;
740
741 if (copy_from_user(str, buffer, count))
742 return -EFAULT;
743
744 str[count] = 0;
745 state = simple_strtoul(str, NULL, 0);
746 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
747
748 status = acpi_video_device_set_state(dev, state);
749
750 if (status)
751 return -EFAULT;
752
753 return count;
754 }
755
756 static int
757 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
758 {
759 struct acpi_video_device *dev =
760 (struct acpi_video_device *)seq->private;
761 int i;
762
763
764 if (!dev || !dev->brightness) {
765 seq_printf(seq, "<not supported>\n");
766 return 0;
767 }
768
769 seq_printf(seq, "levels: ");
770 for (i = 0; i < dev->brightness->count; i++)
771 seq_printf(seq, " %d", dev->brightness->levels[i]);
772 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
773
774 return 0;
775 }
776
777 static int
778 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
779 {
780 return single_open(file, acpi_video_device_brightness_seq_show,
781 PDE(inode)->data);
782 }
783
784 static ssize_t
785 acpi_video_device_write_brightness(struct file *file,
786 const char __user * buffer,
787 size_t count, loff_t * data)
788 {
789 struct seq_file *m = (struct seq_file *)file->private_data;
790 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
791 char str[4] = { 0 };
792 unsigned int level = 0;
793 int i;
794
795
796 if (!dev || !dev->brightness || count + 1 > sizeof str)
797 return -EINVAL;
798
799 if (copy_from_user(str, buffer, count))
800 return -EFAULT;
801
802 str[count] = 0;
803 level = simple_strtoul(str, NULL, 0);
804
805 if (level > 100)
806 return -EFAULT;
807
808 /* validate though the list of available levels */
809 for (i = 0; i < dev->brightness->count; i++)
810 if (level == dev->brightness->levels[i]) {
811 if (ACPI_SUCCESS
812 (acpi_video_device_lcd_set_level(dev, level)))
813 dev->brightness->curr = level;
814 break;
815 }
816
817 return count;
818 }
819
820 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
821 {
822 struct acpi_video_device *dev =
823 (struct acpi_video_device *)seq->private;
824 int status;
825 int i;
826 union acpi_object *edid = NULL;
827
828
829 if (!dev)
830 goto out;
831
832 status = acpi_video_device_EDID(dev, &edid, 128);
833 if (ACPI_FAILURE(status)) {
834 status = acpi_video_device_EDID(dev, &edid, 256);
835 }
836
837 if (ACPI_FAILURE(status)) {
838 goto out;
839 }
840
841 if (edid && edid->type == ACPI_TYPE_BUFFER) {
842 for (i = 0; i < edid->buffer.length; i++)
843 seq_putc(seq, edid->buffer.pointer[i]);
844 }
845
846 out:
847 if (!edid)
848 seq_printf(seq, "<not supported>\n");
849 else
850 kfree(edid);
851
852 return 0;
853 }
854
855 static int
856 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
857 {
858 return single_open(file, acpi_video_device_EDID_seq_show,
859 PDE(inode)->data);
860 }
861
862 static int acpi_video_device_add_fs(struct acpi_device *device)
863 {
864 struct proc_dir_entry *entry = NULL;
865 struct acpi_video_device *vid_dev;
866
867
868 if (!device)
869 return -ENODEV;
870
871 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
872 if (!vid_dev)
873 return -ENODEV;
874
875 if (!acpi_device_dir(device)) {
876 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
877 vid_dev->video->dir);
878 if (!acpi_device_dir(device))
879 return -ENODEV;
880 acpi_device_dir(device)->owner = THIS_MODULE;
881 }
882
883 /* 'info' [R] */
884 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
885 if (!entry)
886 return -ENODEV;
887 else {
888 entry->proc_fops = &acpi_video_device_info_fops;
889 entry->data = acpi_driver_data(device);
890 entry->owner = THIS_MODULE;
891 }
892
893 /* 'state' [R/W] */
894 entry =
895 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
896 acpi_device_dir(device));
897 if (!entry)
898 return -ENODEV;
899 else {
900 acpi_video_device_state_fops.write = acpi_video_device_write_state;
901 entry->proc_fops = &acpi_video_device_state_fops;
902 entry->data = acpi_driver_data(device);
903 entry->owner = THIS_MODULE;
904 }
905
906 /* 'brightness' [R/W] */
907 entry =
908 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
909 acpi_device_dir(device));
910 if (!entry)
911 return -ENODEV;
912 else {
913 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
914 entry->proc_fops = &acpi_video_device_brightness_fops;
915 entry->data = acpi_driver_data(device);
916 entry->owner = THIS_MODULE;
917 }
918
919 /* 'EDID' [R] */
920 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
921 if (!entry)
922 return -ENODEV;
923 else {
924 entry->proc_fops = &acpi_video_device_EDID_fops;
925 entry->data = acpi_driver_data(device);
926 entry->owner = THIS_MODULE;
927 }
928
929 return 0;
930 }
931
932 static int acpi_video_device_remove_fs(struct acpi_device *device)
933 {
934 struct acpi_video_device *vid_dev;
935
936 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
937 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
938 return -ENODEV;
939
940 if (acpi_device_dir(device)) {
941 remove_proc_entry("info", acpi_device_dir(device));
942 remove_proc_entry("state", acpi_device_dir(device));
943 remove_proc_entry("brightness", acpi_device_dir(device));
944 remove_proc_entry("EDID", acpi_device_dir(device));
945 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
946 acpi_device_dir(device) = NULL;
947 }
948
949 return 0;
950 }
951
952 /* video bus */
953 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
954 {
955 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
956
957
958 if (!video)
959 goto end;
960
961 seq_printf(seq, "Switching heads: %s\n",
962 video->flags.multihead ? "yes" : "no");
963 seq_printf(seq, "Video ROM: %s\n",
964 video->flags.rom ? "yes" : "no");
965 seq_printf(seq, "Device to be POSTed on boot: %s\n",
966 video->flags.post ? "yes" : "no");
967
968 end:
969 return 0;
970 }
971
972 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
973 {
974 return single_open(file, acpi_video_bus_info_seq_show,
975 PDE(inode)->data);
976 }
977
978 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
979 {
980 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
981
982
983 if (!video)
984 goto end;
985
986 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
987 seq_printf(seq, "<TODO>\n");
988
989 end:
990 return 0;
991 }
992
993 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
994 {
995 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
996 }
997
998 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
999 {
1000 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1001 unsigned long options;
1002 int status;
1003
1004
1005 if (!video)
1006 goto end;
1007
1008 status = acpi_video_bus_POST_options(video, &options);
1009 if (ACPI_SUCCESS(status)) {
1010 if (!(options & 1)) {
1011 printk(KERN_WARNING PREFIX
1012 "The motherboard VGA device is not listed as a possible POST device.\n");
1013 printk(KERN_WARNING PREFIX
1014 "This indicate a BIOS bug. Please contact the manufacturer.\n");
1015 }
1016 printk("%lx\n", options);
1017 seq_printf(seq, "can POST: <intgrated video>");
1018 if (options & 2)
1019 seq_printf(seq, " <PCI video>");
1020 if (options & 4)
1021 seq_printf(seq, " <AGP video>");
1022 seq_putc(seq, '\n');
1023 } else
1024 seq_printf(seq, "<not supported>\n");
1025 end:
1026 return 0;
1027 }
1028
1029 static int
1030 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1031 {
1032 return single_open(file, acpi_video_bus_POST_info_seq_show,
1033 PDE(inode)->data);
1034 }
1035
1036 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1037 {
1038 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1039 int status;
1040 unsigned long id;
1041
1042
1043 if (!video)
1044 goto end;
1045
1046 status = acpi_video_bus_get_POST(video, &id);
1047 if (!ACPI_SUCCESS(status)) {
1048 seq_printf(seq, "<not supported>\n");
1049 goto end;
1050 }
1051 seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
1052
1053 end:
1054 return 0;
1055 }
1056
1057 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1058 {
1059 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1060
1061
1062 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1063
1064 return 0;
1065 }
1066
1067 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1068 {
1069 return single_open(file, acpi_video_bus_POST_seq_show,
1070 PDE(inode)->data);
1071 }
1072
1073 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1074 {
1075 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1076 }
1077
1078 static ssize_t
1079 acpi_video_bus_write_POST(struct file *file,
1080 const char __user * buffer,
1081 size_t count, loff_t * data)
1082 {
1083 int status;
1084 struct seq_file *m = (struct seq_file *)file->private_data;
1085 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1086 char str[12] = { 0 };
1087 unsigned long opt, options;
1088
1089
1090 if (!video || count + 1 > sizeof str)
1091 return -EINVAL;
1092
1093 status = acpi_video_bus_POST_options(video, &options);
1094 if (!ACPI_SUCCESS(status))
1095 return -EINVAL;
1096
1097 if (copy_from_user(str, buffer, count))
1098 return -EFAULT;
1099
1100 str[count] = 0;
1101 opt = strtoul(str, NULL, 0);
1102 if (opt > 3)
1103 return -EFAULT;
1104
1105 /* just in case an OEM 'forget' the motherboard... */
1106 options |= 1;
1107
1108 if (options & (1ul << opt)) {
1109 status = acpi_video_bus_set_POST(video, opt);
1110 if (!ACPI_SUCCESS(status))
1111 return -EFAULT;
1112
1113 }
1114
1115 return count;
1116 }
1117
1118 static ssize_t
1119 acpi_video_bus_write_DOS(struct file *file,
1120 const char __user * buffer,
1121 size_t count, loff_t * data)
1122 {
1123 int status;
1124 struct seq_file *m = (struct seq_file *)file->private_data;
1125 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1126 char str[12] = { 0 };
1127 unsigned long opt;
1128
1129
1130 if (!video || count + 1 > sizeof str)
1131 return -EINVAL;
1132
1133 if (copy_from_user(str, buffer, count))
1134 return -EFAULT;
1135
1136 str[count] = 0;
1137 opt = strtoul(str, NULL, 0);
1138 if (opt > 7)
1139 return -EFAULT;
1140
1141 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1142
1143 if (!ACPI_SUCCESS(status))
1144 return -EFAULT;
1145
1146 return count;
1147 }
1148
1149 static int acpi_video_bus_add_fs(struct acpi_device *device)
1150 {
1151 struct proc_dir_entry *entry = NULL;
1152 struct acpi_video_bus *video;
1153
1154
1155 video = (struct acpi_video_bus *)acpi_driver_data(device);
1156
1157 if (!acpi_device_dir(device)) {
1158 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1159 acpi_video_dir);
1160 if (!acpi_device_dir(device))
1161 return -ENODEV;
1162 video->dir = acpi_device_dir(device);
1163 acpi_device_dir(device)->owner = THIS_MODULE;
1164 }
1165
1166 /* 'info' [R] */
1167 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1168 if (!entry)
1169 return -ENODEV;
1170 else {
1171 entry->proc_fops = &acpi_video_bus_info_fops;
1172 entry->data = acpi_driver_data(device);
1173 entry->owner = THIS_MODULE;
1174 }
1175
1176 /* 'ROM' [R] */
1177 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1178 if (!entry)
1179 return -ENODEV;
1180 else {
1181 entry->proc_fops = &acpi_video_bus_ROM_fops;
1182 entry->data = acpi_driver_data(device);
1183 entry->owner = THIS_MODULE;
1184 }
1185
1186 /* 'POST_info' [R] */
1187 entry =
1188 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1189 if (!entry)
1190 return -ENODEV;
1191 else {
1192 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1193 entry->data = acpi_driver_data(device);
1194 entry->owner = THIS_MODULE;
1195 }
1196
1197 /* 'POST' [R/W] */
1198 entry =
1199 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1200 acpi_device_dir(device));
1201 if (!entry)
1202 return -ENODEV;
1203 else {
1204 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1205 entry->proc_fops = &acpi_video_bus_POST_fops;
1206 entry->data = acpi_driver_data(device);
1207 entry->owner = THIS_MODULE;
1208 }
1209
1210 /* 'DOS' [R/W] */
1211 entry =
1212 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1213 acpi_device_dir(device));
1214 if (!entry)
1215 return -ENODEV;
1216 else {
1217 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1218 entry->proc_fops = &acpi_video_bus_DOS_fops;
1219 entry->data = acpi_driver_data(device);
1220 entry->owner = THIS_MODULE;
1221 }
1222
1223 return 0;
1224 }
1225
1226 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1227 {
1228 struct acpi_video_bus *video;
1229
1230
1231 video = (struct acpi_video_bus *)acpi_driver_data(device);
1232
1233 if (acpi_device_dir(device)) {
1234 remove_proc_entry("info", acpi_device_dir(device));
1235 remove_proc_entry("ROM", acpi_device_dir(device));
1236 remove_proc_entry("POST_info", acpi_device_dir(device));
1237 remove_proc_entry("POST", acpi_device_dir(device));
1238 remove_proc_entry("DOS", acpi_device_dir(device));
1239 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1240 acpi_device_dir(device) = NULL;
1241 }
1242
1243 return 0;
1244 }
1245
1246 /* --------------------------------------------------------------------------
1247 Driver Interface
1248 -------------------------------------------------------------------------- */
1249
1250 /* device interface */
1251
1252 static int
1253 acpi_video_bus_get_one_device(struct acpi_device *device,
1254 struct acpi_video_bus *video)
1255 {
1256 unsigned long device_id;
1257 int status;
1258 struct acpi_video_device *data;
1259
1260
1261 if (!device || !video)
1262 return -EINVAL;
1263
1264 status =
1265 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1266 if (ACPI_SUCCESS(status)) {
1267
1268 data = kmalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1269 if (!data)
1270 return -ENOMEM;
1271
1272 memset(data, 0, sizeof(struct acpi_video_device));
1273
1274 data->handle = device->handle;
1275 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1276 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1277 acpi_driver_data(device) = data;
1278
1279 data->device_id = device_id;
1280 data->video = video;
1281 data->dev = device;
1282
1283 switch (device_id & 0xffff) {
1284 case 0x0100:
1285 data->flags.crt = 1;
1286 break;
1287 case 0x0400:
1288 data->flags.lcd = 1;
1289 break;
1290 case 0x0200:
1291 data->flags.tvout = 1;
1292 break;
1293 default:
1294 data->flags.unknown = 1;
1295 break;
1296 }
1297
1298 acpi_video_device_bind(video, data);
1299 acpi_video_device_find_cap(data);
1300
1301 status = acpi_install_notify_handler(data->handle,
1302 ACPI_DEVICE_NOTIFY,
1303 acpi_video_device_notify,
1304 data);
1305 if (ACPI_FAILURE(status)) {
1306 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1307 "Error installing notify handler\n"));
1308 if(data->brightness)
1309 kfree(data->brightness->levels);
1310 kfree(data->brightness);
1311 kfree(data);
1312 return -ENODEV;
1313 }
1314
1315 down(&video->sem);
1316 list_add_tail(&data->entry, &video->video_device_list);
1317 up(&video->sem);
1318
1319 acpi_video_device_add_fs(device);
1320
1321 return 0;
1322 }
1323
1324 return -ENOENT;
1325 }
1326
1327 /*
1328 * Arg:
1329 * video : video bus device
1330 *
1331 * Return:
1332 * none
1333 *
1334 * Enumerate the video device list of the video bus,
1335 * bind the ids with the corresponding video devices
1336 * under the video bus.
1337 */
1338
1339 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1340 {
1341 struct list_head *node, *next;
1342 list_for_each_safe(node, next, &video->video_device_list) {
1343 struct acpi_video_device *dev =
1344 container_of(node, struct acpi_video_device, entry);
1345 acpi_video_device_bind(video, dev);
1346 }
1347 }
1348
1349 /*
1350 * Arg:
1351 * video : video bus device
1352 * device : video output device under the video
1353 * bus
1354 *
1355 * Return:
1356 * none
1357 *
1358 * Bind the ids with the corresponding video devices
1359 * under the video bus.
1360 */
1361
1362 static void
1363 acpi_video_device_bind(struct acpi_video_bus *video,
1364 struct acpi_video_device *device)
1365 {
1366 int i;
1367
1368 #define IDS_VAL(i) video->attached_array[i].value.int_val
1369 #define IDS_BIND(i) video->attached_array[i].bind_info
1370
1371 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1372 i < video->attached_count; i++) {
1373 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1374 IDS_BIND(i) = device;
1375 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1376 }
1377 }
1378 #undef IDS_VAL
1379 #undef IDS_BIND
1380 }
1381
1382 /*
1383 * Arg:
1384 * video : video bus device
1385 *
1386 * Return:
1387 * < 0 : error
1388 *
1389 * Call _DOD to enumerate all devices attached to display adapter
1390 *
1391 */
1392
1393 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1394 {
1395 int status;
1396 int count;
1397 int i;
1398 struct acpi_video_enumerated_device *active_device_list;
1399 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1400 union acpi_object *dod = NULL;
1401 union acpi_object *obj;
1402
1403
1404 status = acpi_evaluate_object(video->handle, "_DOD", NULL, &buffer);
1405 if (!ACPI_SUCCESS(status)) {
1406 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1407 return status;
1408 }
1409
1410 dod = (union acpi_object *)buffer.pointer;
1411 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1412 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1413 status = -EFAULT;
1414 goto out;
1415 }
1416
1417 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1418 dod->package.count));
1419
1420 active_device_list = kmalloc((1 +
1421 dod->package.count) *
1422 sizeof(struct
1423 acpi_video_enumerated_device),
1424 GFP_KERNEL);
1425
1426 if (!active_device_list) {
1427 status = -ENOMEM;
1428 goto out;
1429 }
1430
1431 count = 0;
1432 for (i = 0; i < dod->package.count; i++) {
1433 obj = (union acpi_object *)&dod->package.elements[i];
1434
1435 if (obj->type != ACPI_TYPE_INTEGER) {
1436 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1437 active_device_list[i].value.int_val =
1438 ACPI_VIDEO_HEAD_INVALID;
1439 }
1440 active_device_list[i].value.int_val = obj->integer.value;
1441 active_device_list[i].bind_info = NULL;
1442 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1443 (int)obj->integer.value));
1444 count++;
1445 }
1446 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1447
1448 kfree(video->attached_array);
1449
1450 video->attached_array = active_device_list;
1451 video->attached_count = count;
1452 out:
1453 kfree(buffer.pointer);
1454 return status;
1455 }
1456
1457 /*
1458 * Arg:
1459 * video : video bus device
1460 * event : Nontify Event
1461 *
1462 * Return:
1463 * < 0 : error
1464 *
1465 * 1. Find out the current active output device.
1466 * 2. Identify the next output device to switch
1467 * 3. call _DSS to do actual switch.
1468 */
1469
1470 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1471 {
1472 struct list_head *node, *next;
1473 struct acpi_video_device *dev = NULL;
1474 struct acpi_video_device *dev_next = NULL;
1475 struct acpi_video_device *dev_prev = NULL;
1476 unsigned long state;
1477 int status = 0;
1478
1479
1480 list_for_each_safe(node, next, &video->video_device_list) {
1481 dev = container_of(node, struct acpi_video_device, entry);
1482 status = acpi_video_device_get_state(dev, &state);
1483 if (state & 0x2) {
1484 dev_next =
1485 container_of(node->next, struct acpi_video_device,
1486 entry);
1487 dev_prev =
1488 container_of(node->prev, struct acpi_video_device,
1489 entry);
1490 goto out;
1491 }
1492 }
1493 dev_next = container_of(node->next, struct acpi_video_device, entry);
1494 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1495 out:
1496 switch (event) {
1497 case ACPI_VIDEO_NOTIFY_CYCLE:
1498 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1499 acpi_video_device_set_state(dev, 0);
1500 acpi_video_device_set_state(dev_next, 0x80000001);
1501 break;
1502 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1503 acpi_video_device_set_state(dev, 0);
1504 acpi_video_device_set_state(dev_prev, 0x80000001);
1505 default:
1506 break;
1507 }
1508
1509 return status;
1510 }
1511
1512 static int
1513 acpi_video_get_next_level(struct acpi_video_device *device,
1514 u32 level_current, u32 event)
1515 {
1516 /*Fix me */
1517 return level_current;
1518 }
1519
1520 static void
1521 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1522 {
1523 unsigned long level_current, level_next;
1524 acpi_video_device_lcd_get_level_current(device, &level_current);
1525 level_next = acpi_video_get_next_level(device, level_current, event);
1526 acpi_video_device_lcd_set_level(device, level_next);
1527 }
1528
1529 static int
1530 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1531 struct acpi_device *device)
1532 {
1533 int status = 0;
1534 struct list_head *node, *next;
1535
1536
1537 acpi_video_device_enumerate(video);
1538
1539 list_for_each_safe(node, next, &device->children) {
1540 struct acpi_device *dev =
1541 list_entry(node, struct acpi_device, node);
1542
1543 if (!dev)
1544 continue;
1545
1546 status = acpi_video_bus_get_one_device(dev, video);
1547 if (ACPI_FAILURE(status)) {
1548 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1549 continue;
1550 }
1551
1552 }
1553 return status;
1554 }
1555
1556 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1557 {
1558 acpi_status status;
1559 struct acpi_video_bus *video;
1560
1561
1562 if (!device || !device->video)
1563 return -ENOENT;
1564
1565 video = device->video;
1566
1567 down(&video->sem);
1568 list_del(&device->entry);
1569 up(&video->sem);
1570 acpi_video_device_remove_fs(device->dev);
1571
1572 status = acpi_remove_notify_handler(device->handle,
1573 ACPI_DEVICE_NOTIFY,
1574 acpi_video_device_notify);
1575
1576 return 0;
1577 }
1578
1579 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1580 {
1581 int status;
1582 struct list_head *node, *next;
1583
1584
1585 list_for_each_safe(node, next, &video->video_device_list) {
1586 struct acpi_video_device *data =
1587 list_entry(node, struct acpi_video_device, entry);
1588 if (!data)
1589 continue;
1590
1591 status = acpi_video_bus_put_one_device(data);
1592 if (ACPI_FAILURE(status))
1593 printk(KERN_WARNING PREFIX
1594 "hhuuhhuu bug in acpi video driver.\n");
1595
1596 if (data->brightness)
1597 kfree(data->brightness->levels);
1598 kfree(data->brightness);
1599 kfree(data);
1600 }
1601
1602 return 0;
1603 }
1604
1605 /* acpi_video interface */
1606
1607 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1608 {
1609 return acpi_video_bus_DOS(video, 1, 0);
1610 }
1611
1612 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1613 {
1614 return acpi_video_bus_DOS(video, 0, 1);
1615 }
1616
1617 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1618 {
1619 struct acpi_video_bus *video = (struct acpi_video_bus *)data;
1620 struct acpi_device *device = NULL;
1621
1622 printk("video bus notify\n");
1623
1624 if (!video)
1625 return;
1626
1627 if (acpi_bus_get_device(handle, &device))
1628 return;
1629
1630 switch (event) {
1631 case ACPI_VIDEO_NOTIFY_SWITCH: /* User request that a switch occur,
1632 * most likely via hotkey. */
1633 acpi_bus_generate_event(device, event, 0);
1634 break;
1635
1636 case ACPI_VIDEO_NOTIFY_PROBE: /* User plug or remove a video
1637 * connector. */
1638 acpi_video_device_enumerate(video);
1639 acpi_video_device_rebind(video);
1640 acpi_video_switch_output(video, event);
1641 acpi_bus_generate_event(device, event, 0);
1642 break;
1643
1644 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1645 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1646 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1647 acpi_video_switch_output(video, event);
1648 acpi_bus_generate_event(device, event, 0);
1649 break;
1650
1651 default:
1652 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1653 "Unsupported event [0x%x]\n", event));
1654 break;
1655 }
1656
1657 return;
1658 }
1659
1660 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1661 {
1662 struct acpi_video_device *video_device =
1663 (struct acpi_video_device *)data;
1664 struct acpi_device *device = NULL;
1665
1666
1667 printk("video device notify\n");
1668 if (!video_device)
1669 return;
1670
1671 if (acpi_bus_get_device(handle, &device))
1672 return;
1673
1674 switch (event) {
1675 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1676 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1677 acpi_bus_generate_event(device, event, 0);
1678 break;
1679 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1680 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1681 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1682 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1683 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1684 acpi_video_switch_brightness(video_device, event);
1685 acpi_bus_generate_event(device, event, 0);
1686 break;
1687 default:
1688 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1689 "Unsupported event [0x%x]\n", event));
1690 break;
1691 }
1692 return;
1693 }
1694
1695 static int acpi_video_bus_add(struct acpi_device *device)
1696 {
1697 int result = 0;
1698 acpi_status status = 0;
1699 struct acpi_video_bus *video = NULL;
1700
1701
1702 if (!device)
1703 return -EINVAL;
1704
1705 video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1706 if (!video)
1707 return -ENOMEM;
1708 memset(video, 0, sizeof(struct acpi_video_bus));
1709
1710 video->handle = device->handle;
1711 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1712 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1713 acpi_driver_data(device) = video;
1714
1715 acpi_video_bus_find_cap(video);
1716 result = acpi_video_bus_check(video);
1717 if (result)
1718 goto end;
1719
1720 result = acpi_video_bus_add_fs(device);
1721 if (result)
1722 goto end;
1723
1724 init_MUTEX(&video->sem);
1725 INIT_LIST_HEAD(&video->video_device_list);
1726
1727 acpi_video_bus_get_devices(video, device);
1728 acpi_video_bus_start_devices(video);
1729
1730 status = acpi_install_notify_handler(video->handle,
1731 ACPI_DEVICE_NOTIFY,
1732 acpi_video_bus_notify, video);
1733 if (ACPI_FAILURE(status)) {
1734 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1735 "Error installing notify handler\n"));
1736 acpi_video_bus_stop_devices(video);
1737 acpi_video_bus_put_devices(video);
1738 kfree(video->attached_array);
1739 acpi_video_bus_remove_fs(device);
1740 result = -ENODEV;
1741 goto end;
1742 }
1743
1744 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1745 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1746 video->flags.multihead ? "yes" : "no",
1747 video->flags.rom ? "yes" : "no",
1748 video->flags.post ? "yes" : "no");
1749
1750 end:
1751 if (result)
1752 kfree(video);
1753
1754 return result;
1755 }
1756
1757 static int acpi_video_bus_remove(struct acpi_device *device, int type)
1758 {
1759 acpi_status status = 0;
1760 struct acpi_video_bus *video = NULL;
1761
1762
1763 if (!device || !acpi_driver_data(device))
1764 return -EINVAL;
1765
1766 video = (struct acpi_video_bus *)acpi_driver_data(device);
1767
1768 acpi_video_bus_stop_devices(video);
1769
1770 status = acpi_remove_notify_handler(video->handle,
1771 ACPI_DEVICE_NOTIFY,
1772 acpi_video_bus_notify);
1773
1774 acpi_video_bus_put_devices(video);
1775 acpi_video_bus_remove_fs(device);
1776
1777 kfree(video->attached_array);
1778 kfree(video);
1779
1780 return 0;
1781 }
1782
1783 static int
1784 acpi_video_bus_match(struct acpi_device *device, struct acpi_driver *driver)
1785 {
1786 acpi_handle h_dummy1;
1787 acpi_handle h_dummy2;
1788 acpi_handle h_dummy3;
1789
1790
1791 if (!device || !driver)
1792 return -EINVAL;
1793
1794 /* Since there is no HID, CID for ACPI Video drivers, we have
1795 * to check well known required nodes for each feature we support.
1796 */
1797
1798 /* Does this device able to support video switching ? */
1799 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
1800 ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
1801 return 0;
1802
1803 /* Does this device able to retrieve a video ROM ? */
1804 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
1805 return 0;
1806
1807 /* Does this device able to configure which video head to be POSTed ? */
1808 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
1809 ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
1810 ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
1811 return 0;
1812
1813 return -ENODEV;
1814 }
1815
1816 static int __init acpi_video_init(void)
1817 {
1818 int result = 0;
1819
1820
1821 /*
1822 acpi_dbg_level = 0xFFFFFFFF;
1823 acpi_dbg_layer = 0x08000000;
1824 */
1825
1826 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1827 if (!acpi_video_dir)
1828 return -ENODEV;
1829 acpi_video_dir->owner = THIS_MODULE;
1830
1831 result = acpi_bus_register_driver(&acpi_video_bus);
1832 if (result < 0) {
1833 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1834 return -ENODEV;
1835 }
1836
1837 return 0;
1838 }
1839
1840 static void __exit acpi_video_exit(void)
1841 {
1842
1843 acpi_bus_unregister_driver(&acpi_video_bus);
1844
1845 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1846
1847 return;
1848 }
1849
1850 module_init(acpi_video_init);
1851 module_exit(acpi_video_exit);
Linux kernel - Deliverables
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