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Merge branch 'work-fixes'
[mirror_ubuntu-bionic-kernel.git] / drivers / acpi / video.c
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 *
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 ACPI_FUNCTION_TRACE("acpi_video_device_query");
276 status = acpi_evaluate_integer(device->handle, "_DGS", NULL, state);
277
278 return_VALUE(status);
279 }
280
281 static int
282 acpi_video_device_get_state(struct acpi_video_device *device,
283 unsigned long *state)
284 {
285 int status;
286
287 ACPI_FUNCTION_TRACE("acpi_video_device_get_state");
288
289 status = acpi_evaluate_integer(device->handle, "_DCS", NULL, state);
290
291 return_VALUE(status);
292 }
293
294 static int
295 acpi_video_device_set_state(struct acpi_video_device *device, int state)
296 {
297 int status;
298 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
299 struct acpi_object_list args = { 1, &arg0 };
300 unsigned long ret;
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, &ret);
306
307 return_VALUE(status);
308 }
309
310 static int
311 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
312 union acpi_object **levels)
313 {
314 int status;
315 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
316 union acpi_object *obj;
317
318 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_query_levels");
319
320 *levels = NULL;
321
322 status = acpi_evaluate_object(device->handle, "_BCL", NULL, &buffer);
323 if (!ACPI_SUCCESS(status))
324 return_VALUE(status);
325 obj = (union acpi_object *)buffer.pointer;
326 if (!obj && (obj->type != ACPI_TYPE_PACKAGE)) {
327 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _BCL data\n"));
328 status = -EFAULT;
329 goto err;
330 }
331
332 *levels = obj;
333
334 return_VALUE(0);
335
336 err:
337 kfree(buffer.pointer);
338
339 return_VALUE(status);
340 }
341
342 static int
343 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
344 {
345 int status;
346 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
347 struct acpi_object_list args = { 1, &arg0 };
348
349 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_set_level");
350
351 arg0.integer.value = level;
352 status = acpi_evaluate_object(device->handle, "_BCM", &args, NULL);
353
354 printk(KERN_DEBUG "set_level status: %x\n", status);
355 return_VALUE(status);
356 }
357
358 static int
359 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
360 unsigned long *level)
361 {
362 int status;
363 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_get_level_current");
364
365 status = acpi_evaluate_integer(device->handle, "_BQC", NULL, level);
366
367 return_VALUE(status);
368 }
369
370 static int
371 acpi_video_device_EDID(struct acpi_video_device *device,
372 union acpi_object **edid, ssize_t length)
373 {
374 int status;
375 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
376 union acpi_object *obj;
377 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
378 struct acpi_object_list args = { 1, &arg0 };
379
380 ACPI_FUNCTION_TRACE("acpi_video_device_get_EDID");
381
382 *edid = NULL;
383
384 if (!device)
385 return_VALUE(-ENODEV);
386 if (length == 128)
387 arg0.integer.value = 1;
388 else if (length == 256)
389 arg0.integer.value = 2;
390 else
391 return_VALUE(-EINVAL);
392
393 status = acpi_evaluate_object(device->handle, "_DDC", &args, &buffer);
394 if (ACPI_FAILURE(status))
395 return_VALUE(-ENODEV);
396
397 obj = (union acpi_object *)buffer.pointer;
398
399 if (obj && obj->type == ACPI_TYPE_BUFFER)
400 *edid = obj;
401 else {
402 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DDC data\n"));
403 status = -EFAULT;
404 kfree(obj);
405 }
406
407 return_VALUE(status);
408 }
409
410 /* bus */
411
412 static int
413 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
414 {
415 int status;
416 unsigned long tmp;
417 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
418 struct acpi_object_list args = { 1, &arg0 };
419
420 ACPI_FUNCTION_TRACE("acpi_video_bus_set_POST");
421
422 arg0.integer.value = option;
423
424 status = acpi_evaluate_integer(video->handle, "_SPD", &args, &tmp);
425 if (ACPI_SUCCESS(status))
426 status = tmp ? (-EINVAL) : (AE_OK);
427
428 return_VALUE(status);
429 }
430
431 static int
432 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
433 {
434 int status;
435
436 ACPI_FUNCTION_TRACE("acpi_video_bus_get_POST");
437
438 status = acpi_evaluate_integer(video->handle, "_GPD", NULL, id);
439
440 return_VALUE(status);
441 }
442
443 static int
444 acpi_video_bus_POST_options(struct acpi_video_bus *video,
445 unsigned long *options)
446 {
447 int status;
448 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_options");
449
450 status = acpi_evaluate_integer(video->handle, "_VPO", NULL, options);
451 *options &= 3;
452
453 return_VALUE(status);
454 }
455
456 /*
457 * Arg:
458 * video : video bus device pointer
459 * bios_flag :
460 * 0. The system BIOS should NOT automatically switch(toggle)
461 * the active display output.
462 * 1. The system BIOS should automatically switch (toggle) the
463 * active display output. No swich event.
464 * 2. The _DGS value should be locked.
465 * 3. The system BIOS should not automatically switch (toggle) the
466 * active display output, but instead generate the display switch
467 * event notify code.
468 * lcd_flag :
469 * 0. The system BIOS should automatically control the brightness level
470 * of the LCD, when the power changes from AC to DC
471 * 1. The system BIOS should NOT automatically control the brightness
472 * level of the LCD, when the power changes from AC to DC.
473 * Return Value:
474 * -1 wrong arg.
475 */
476
477 static int
478 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
479 {
480 acpi_integer status = 0;
481 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
482 struct acpi_object_list args = { 1, &arg0 };
483
484 ACPI_FUNCTION_TRACE("acpi_video_bus_DOS");
485
486 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
487 status = -1;
488 goto Failed;
489 }
490 arg0.integer.value = (lcd_flag << 2) | bios_flag;
491 video->dos_setting = arg0.integer.value;
492 acpi_evaluate_object(video->handle, "_DOS", &args, NULL);
493
494 Failed:
495 return_VALUE(status);
496 }
497
498 /*
499 * Arg:
500 * device : video output device (LCD, CRT, ..)
501 *
502 * Return Value:
503 * None
504 *
505 * Find out all required AML method defined under the output
506 * device.
507 */
508
509 static void acpi_video_device_find_cap(struct acpi_video_device *device)
510 {
511 acpi_integer status;
512 acpi_handle h_dummy1;
513 int i;
514 union acpi_object *obj = NULL;
515 struct acpi_video_device_brightness *br = NULL;
516
517 ACPI_FUNCTION_TRACE("acpi_video_device_find_cap");
518
519 memset(&device->cap, 0, 4);
520
521 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ADR", &h_dummy1))) {
522 device->cap._ADR = 1;
523 }
524 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCL", &h_dummy1))) {
525 device->cap._BCL = 1;
526 }
527 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCM", &h_dummy1))) {
528 device->cap._BCM = 1;
529 }
530 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DDC", &h_dummy1))) {
531 device->cap._DDC = 1;
532 }
533 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DCS", &h_dummy1))) {
534 device->cap._DCS = 1;
535 }
536 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DGS", &h_dummy1))) {
537 device->cap._DGS = 1;
538 }
539 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DSS", &h_dummy1))) {
540 device->cap._DSS = 1;
541 }
542
543 status = acpi_video_device_lcd_query_levels(device, &obj);
544
545 if (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
546 int count = 0;
547 union acpi_object *o;
548
549 br = kmalloc(sizeof(*br), GFP_KERNEL);
550 if (!br) {
551 printk(KERN_ERR "can't allocate memory\n");
552 } else {
553 memset(br, 0, sizeof(*br));
554 br->levels = kmalloc(obj->package.count *
555 sizeof *(br->levels), GFP_KERNEL);
556 if (!br->levels)
557 goto out;
558
559 for (i = 0; i < obj->package.count; i++) {
560 o = (union acpi_object *)&obj->package.
561 elements[i];
562 if (o->type != ACPI_TYPE_INTEGER) {
563 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
564 "Invalid data\n"));
565 continue;
566 }
567 br->levels[count] = (u32) o->integer.value;
568 count++;
569 }
570 out:
571 if (count < 2) {
572 kfree(br->levels);
573 kfree(br);
574 } else {
575 br->count = count;
576 device->brightness = br;
577 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
578 "found %d brightness levels\n",
579 count));
580 }
581 }
582 }
583
584 kfree(obj);
585
586 return_VOID;
587 }
588
589 /*
590 * Arg:
591 * device : video output device (VGA)
592 *
593 * Return Value:
594 * None
595 *
596 * Find out all required AML method defined under the video bus device.
597 */
598
599 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
600 {
601 acpi_handle h_dummy1;
602
603 memset(&video->cap, 0, 4);
604 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOS", &h_dummy1))) {
605 video->cap._DOS = 1;
606 }
607 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOD", &h_dummy1))) {
608 video->cap._DOD = 1;
609 }
610 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_ROM", &h_dummy1))) {
611 video->cap._ROM = 1;
612 }
613 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_GPD", &h_dummy1))) {
614 video->cap._GPD = 1;
615 }
616 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_SPD", &h_dummy1))) {
617 video->cap._SPD = 1;
618 }
619 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_VPO", &h_dummy1))) {
620 video->cap._VPO = 1;
621 }
622 }
623
624 /*
625 * Check whether the video bus device has required AML method to
626 * support the desired features
627 */
628
629 static int acpi_video_bus_check(struct acpi_video_bus *video)
630 {
631 acpi_status status = -ENOENT;
632
633 ACPI_FUNCTION_TRACE("acpi_video_bus_check");
634
635 if (!video)
636 return_VALUE(-EINVAL);
637
638 /* Since there is no HID, CID and so on for VGA driver, we have
639 * to check well known required nodes.
640 */
641
642 /* Does this device able to support video switching ? */
643 if (video->cap._DOS) {
644 video->flags.multihead = 1;
645 status = 0;
646 }
647
648 /* Does this device able to retrieve a retrieve a video ROM ? */
649 if (video->cap._ROM) {
650 video->flags.rom = 1;
651 status = 0;
652 }
653
654 /* Does this device able to configure which video device to POST ? */
655 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
656 video->flags.post = 1;
657 status = 0;
658 }
659
660 return_VALUE(status);
661 }
662
663 /* --------------------------------------------------------------------------
664 FS Interface (/proc)
665 -------------------------------------------------------------------------- */
666
667 static struct proc_dir_entry *acpi_video_dir;
668
669 /* video devices */
670
671 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
672 {
673 struct acpi_video_device *dev =
674 (struct acpi_video_device *)seq->private;
675
676 ACPI_FUNCTION_TRACE("acpi_video_device_info_seq_show");
677
678 if (!dev)
679 goto end;
680
681 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
682 seq_printf(seq, "type: ");
683 if (dev->flags.crt)
684 seq_printf(seq, "CRT\n");
685 else if (dev->flags.lcd)
686 seq_printf(seq, "LCD\n");
687 else if (dev->flags.tvout)
688 seq_printf(seq, "TVOUT\n");
689 else
690 seq_printf(seq, "UNKNOWN\n");
691
692 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
693
694 end:
695 return_VALUE(0);
696 }
697
698 static int
699 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
700 {
701 return single_open(file, acpi_video_device_info_seq_show,
702 PDE(inode)->data);
703 }
704
705 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
706 {
707 int status;
708 struct acpi_video_device *dev =
709 (struct acpi_video_device *)seq->private;
710 unsigned long state;
711
712 ACPI_FUNCTION_TRACE("acpi_video_device_state_seq_show");
713
714 if (!dev)
715 goto end;
716
717 status = acpi_video_device_get_state(dev, &state);
718 seq_printf(seq, "state: ");
719 if (ACPI_SUCCESS(status))
720 seq_printf(seq, "0x%02lx\n", state);
721 else
722 seq_printf(seq, "<not supported>\n");
723
724 status = acpi_video_device_query(dev, &state);
725 seq_printf(seq, "query: ");
726 if (ACPI_SUCCESS(status))
727 seq_printf(seq, "0x%02lx\n", state);
728 else
729 seq_printf(seq, "<not supported>\n");
730
731 end:
732 return_VALUE(0);
733 }
734
735 static int
736 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
737 {
738 return single_open(file, acpi_video_device_state_seq_show,
739 PDE(inode)->data);
740 }
741
742 static ssize_t
743 acpi_video_device_write_state(struct file *file,
744 const char __user * buffer,
745 size_t count, loff_t * data)
746 {
747 int status;
748 struct seq_file *m = (struct seq_file *)file->private_data;
749 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
750 char str[12] = { 0 };
751 u32 state = 0;
752
753 ACPI_FUNCTION_TRACE("acpi_video_device_write_state");
754
755 if (!dev || count + 1 > sizeof str)
756 return_VALUE(-EINVAL);
757
758 if (copy_from_user(str, buffer, count))
759 return_VALUE(-EFAULT);
760
761 str[count] = 0;
762 state = simple_strtoul(str, NULL, 0);
763 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
764
765 status = acpi_video_device_set_state(dev, state);
766
767 if (status)
768 return_VALUE(-EFAULT);
769
770 return_VALUE(count);
771 }
772
773 static int
774 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
775 {
776 struct acpi_video_device *dev =
777 (struct acpi_video_device *)seq->private;
778 int i;
779
780 ACPI_FUNCTION_TRACE("acpi_video_device_brightness_seq_show");
781
782 if (!dev || !dev->brightness) {
783 seq_printf(seq, "<not supported>\n");
784 return_VALUE(0);
785 }
786
787 seq_printf(seq, "levels: ");
788 for (i = 0; i < dev->brightness->count; i++)
789 seq_printf(seq, " %d", dev->brightness->levels[i]);
790 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
791
792 return_VALUE(0);
793 }
794
795 static int
796 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
797 {
798 return single_open(file, acpi_video_device_brightness_seq_show,
799 PDE(inode)->data);
800 }
801
802 static ssize_t
803 acpi_video_device_write_brightness(struct file *file,
804 const char __user * buffer,
805 size_t count, loff_t * data)
806 {
807 struct seq_file *m = (struct seq_file *)file->private_data;
808 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
809 char str[4] = { 0 };
810 unsigned int level = 0;
811 int i;
812
813 ACPI_FUNCTION_TRACE("acpi_video_device_write_brightness");
814
815 if (!dev || !dev->brightness || count + 1 > sizeof str)
816 return_VALUE(-EINVAL);
817
818 if (copy_from_user(str, buffer, count))
819 return_VALUE(-EFAULT);
820
821 str[count] = 0;
822 level = simple_strtoul(str, NULL, 0);
823
824 if (level > 100)
825 return_VALUE(-EFAULT);
826
827 /* validate though the list of available levels */
828 for (i = 0; i < dev->brightness->count; i++)
829 if (level == dev->brightness->levels[i]) {
830 if (ACPI_SUCCESS
831 (acpi_video_device_lcd_set_level(dev, level)))
832 dev->brightness->curr = level;
833 break;
834 }
835
836 return_VALUE(count);
837 }
838
839 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
840 {
841 struct acpi_video_device *dev =
842 (struct acpi_video_device *)seq->private;
843 int status;
844 int i;
845 union acpi_object *edid = NULL;
846
847 ACPI_FUNCTION_TRACE("acpi_video_device_EDID_seq_show");
848
849 if (!dev)
850 goto out;
851
852 status = acpi_video_device_EDID(dev, &edid, 128);
853 if (ACPI_FAILURE(status)) {
854 status = acpi_video_device_EDID(dev, &edid, 256);
855 }
856
857 if (ACPI_FAILURE(status)) {
858 goto out;
859 }
860
861 if (edid && edid->type == ACPI_TYPE_BUFFER) {
862 for (i = 0; i < edid->buffer.length; i++)
863 seq_putc(seq, edid->buffer.pointer[i]);
864 }
865
866 out:
867 if (!edid)
868 seq_printf(seq, "<not supported>\n");
869 else
870 kfree(edid);
871
872 return_VALUE(0);
873 }
874
875 static int
876 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
877 {
878 return single_open(file, acpi_video_device_EDID_seq_show,
879 PDE(inode)->data);
880 }
881
882 static int acpi_video_device_add_fs(struct acpi_device *device)
883 {
884 struct proc_dir_entry *entry = NULL;
885 struct acpi_video_device *vid_dev;
886
887 ACPI_FUNCTION_TRACE("acpi_video_device_add_fs");
888
889 if (!device)
890 return_VALUE(-ENODEV);
891
892 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
893 if (!vid_dev)
894 return_VALUE(-ENODEV);
895
896 if (!acpi_device_dir(device)) {
897 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
898 vid_dev->video->dir);
899 if (!acpi_device_dir(device))
900 return_VALUE(-ENODEV);
901 acpi_device_dir(device)->owner = THIS_MODULE;
902 }
903
904 /* 'info' [R] */
905 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
906 if (!entry)
907 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
908 "Unable to create 'info' fs entry\n"));
909 else {
910 entry->proc_fops = &acpi_video_device_info_fops;
911 entry->data = acpi_driver_data(device);
912 entry->owner = THIS_MODULE;
913 }
914
915 /* 'state' [R/W] */
916 entry =
917 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
918 acpi_device_dir(device));
919 if (!entry)
920 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
921 "Unable to create 'state' fs entry\n"));
922 else {
923 acpi_video_device_state_fops.write = acpi_video_device_write_state;
924 entry->proc_fops = &acpi_video_device_state_fops;
925 entry->data = acpi_driver_data(device);
926 entry->owner = THIS_MODULE;
927 }
928
929 /* 'brightness' [R/W] */
930 entry =
931 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
932 acpi_device_dir(device));
933 if (!entry)
934 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
935 "Unable to create 'brightness' fs entry\n"));
936 else {
937 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
938 entry->proc_fops = &acpi_video_device_brightness_fops;
939 entry->data = acpi_driver_data(device);
940 entry->owner = THIS_MODULE;
941 }
942
943 /* 'EDID' [R] */
944 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
945 if (!entry)
946 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
947 "Unable to create 'brightness' fs entry\n"));
948 else {
949 entry->proc_fops = &acpi_video_device_EDID_fops;
950 entry->data = acpi_driver_data(device);
951 entry->owner = THIS_MODULE;
952 }
953
954 return_VALUE(0);
955 }
956
957 static int acpi_video_device_remove_fs(struct acpi_device *device)
958 {
959 struct acpi_video_device *vid_dev;
960 ACPI_FUNCTION_TRACE("acpi_video_device_remove_fs");
961
962 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
963 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
964 return_VALUE(-ENODEV);
965
966 if (acpi_device_dir(device)) {
967 remove_proc_entry("info", acpi_device_dir(device));
968 remove_proc_entry("state", acpi_device_dir(device));
969 remove_proc_entry("brightness", acpi_device_dir(device));
970 remove_proc_entry("EDID", acpi_device_dir(device));
971 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
972 acpi_device_dir(device) = NULL;
973 }
974
975 return_VALUE(0);
976 }
977
978 /* video bus */
979 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
980 {
981 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
982
983 ACPI_FUNCTION_TRACE("acpi_video_bus_info_seq_show");
984
985 if (!video)
986 goto end;
987
988 seq_printf(seq, "Switching heads: %s\n",
989 video->flags.multihead ? "yes" : "no");
990 seq_printf(seq, "Video ROM: %s\n",
991 video->flags.rom ? "yes" : "no");
992 seq_printf(seq, "Device to be POSTed on boot: %s\n",
993 video->flags.post ? "yes" : "no");
994
995 end:
996 return_VALUE(0);
997 }
998
999 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1000 {
1001 return single_open(file, acpi_video_bus_info_seq_show,
1002 PDE(inode)->data);
1003 }
1004
1005 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1006 {
1007 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1008
1009 ACPI_FUNCTION_TRACE("acpi_video_bus_ROM_seq_show");
1010
1011 if (!video)
1012 goto end;
1013
1014 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1015 seq_printf(seq, "<TODO>\n");
1016
1017 end:
1018 return_VALUE(0);
1019 }
1020
1021 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1022 {
1023 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1024 }
1025
1026 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1027 {
1028 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1029 unsigned long options;
1030 int status;
1031
1032 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_info_seq_show");
1033
1034 if (!video)
1035 goto end;
1036
1037 status = acpi_video_bus_POST_options(video, &options);
1038 if (ACPI_SUCCESS(status)) {
1039 if (!(options & 1)) {
1040 printk(KERN_WARNING PREFIX
1041 "The motherboard VGA device is not listed as a possible POST device.\n");
1042 printk(KERN_WARNING PREFIX
1043 "This indicate a BIOS bug. Please contact the manufacturer.\n");
1044 }
1045 printk("%lx\n", options);
1046 seq_printf(seq, "can POST: <intgrated video>");
1047 if (options & 2)
1048 seq_printf(seq, " <PCI video>");
1049 if (options & 4)
1050 seq_printf(seq, " <AGP video>");
1051 seq_putc(seq, '\n');
1052 } else
1053 seq_printf(seq, "<not supported>\n");
1054 end:
1055 return_VALUE(0);
1056 }
1057
1058 static int
1059 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1060 {
1061 return single_open(file, acpi_video_bus_POST_info_seq_show,
1062 PDE(inode)->data);
1063 }
1064
1065 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1066 {
1067 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1068 int status;
1069 unsigned long id;
1070
1071 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_seq_show");
1072
1073 if (!video)
1074 goto end;
1075
1076 status = acpi_video_bus_get_POST(video, &id);
1077 if (!ACPI_SUCCESS(status)) {
1078 seq_printf(seq, "<not supported>\n");
1079 goto end;
1080 }
1081 seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
1082
1083 end:
1084 return_VALUE(0);
1085 }
1086
1087 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1088 {
1089 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1090
1091 ACPI_FUNCTION_TRACE("acpi_video_bus_DOS_seq_show");
1092
1093 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1094
1095 return_VALUE(0);
1096 }
1097
1098 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1099 {
1100 return single_open(file, acpi_video_bus_POST_seq_show,
1101 PDE(inode)->data);
1102 }
1103
1104 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1105 {
1106 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1107 }
1108
1109 static ssize_t
1110 acpi_video_bus_write_POST(struct file *file,
1111 const char __user * buffer,
1112 size_t count, loff_t * data)
1113 {
1114 int status;
1115 struct seq_file *m = (struct seq_file *)file->private_data;
1116 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1117 char str[12] = { 0 };
1118 unsigned long opt, options;
1119
1120 ACPI_FUNCTION_TRACE("acpi_video_bus_write_POST");
1121
1122 if (!video || count + 1 > sizeof str)
1123 return_VALUE(-EINVAL);
1124
1125 status = acpi_video_bus_POST_options(video, &options);
1126 if (!ACPI_SUCCESS(status))
1127 return_VALUE(-EINVAL);
1128
1129 if (copy_from_user(str, buffer, count))
1130 return_VALUE(-EFAULT);
1131
1132 str[count] = 0;
1133 opt = strtoul(str, NULL, 0);
1134 if (opt > 3)
1135 return_VALUE(-EFAULT);
1136
1137 /* just in case an OEM 'forget' the motherboard... */
1138 options |= 1;
1139
1140 if (options & (1ul << opt)) {
1141 status = acpi_video_bus_set_POST(video, opt);
1142 if (!ACPI_SUCCESS(status))
1143 return_VALUE(-EFAULT);
1144
1145 }
1146
1147 return_VALUE(count);
1148 }
1149
1150 static ssize_t
1151 acpi_video_bus_write_DOS(struct file *file,
1152 const char __user * buffer,
1153 size_t count, loff_t * data)
1154 {
1155 int status;
1156 struct seq_file *m = (struct seq_file *)file->private_data;
1157 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1158 char str[12] = { 0 };
1159 unsigned long opt;
1160
1161 ACPI_FUNCTION_TRACE("acpi_video_bus_write_DOS");
1162
1163 if (!video || count + 1 > sizeof str)
1164 return_VALUE(-EINVAL);
1165
1166 if (copy_from_user(str, buffer, count))
1167 return_VALUE(-EFAULT);
1168
1169 str[count] = 0;
1170 opt = strtoul(str, NULL, 0);
1171 if (opt > 7)
1172 return_VALUE(-EFAULT);
1173
1174 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1175
1176 if (!ACPI_SUCCESS(status))
1177 return_VALUE(-EFAULT);
1178
1179 return_VALUE(count);
1180 }
1181
1182 static int acpi_video_bus_add_fs(struct acpi_device *device)
1183 {
1184 struct proc_dir_entry *entry = NULL;
1185 struct acpi_video_bus *video;
1186
1187 ACPI_FUNCTION_TRACE("acpi_video_bus_add_fs");
1188
1189 video = (struct acpi_video_bus *)acpi_driver_data(device);
1190
1191 if (!acpi_device_dir(device)) {
1192 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1193 acpi_video_dir);
1194 if (!acpi_device_dir(device))
1195 return_VALUE(-ENODEV);
1196 video->dir = acpi_device_dir(device);
1197 acpi_device_dir(device)->owner = THIS_MODULE;
1198 }
1199
1200 /* 'info' [R] */
1201 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1202 if (!entry)
1203 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1204 "Unable to create 'info' fs entry\n"));
1205 else {
1206 entry->proc_fops = &acpi_video_bus_info_fops;
1207 entry->data = acpi_driver_data(device);
1208 entry->owner = THIS_MODULE;
1209 }
1210
1211 /* 'ROM' [R] */
1212 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1213 if (!entry)
1214 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1215 "Unable to create 'ROM' fs entry\n"));
1216 else {
1217 entry->proc_fops = &acpi_video_bus_ROM_fops;
1218 entry->data = acpi_driver_data(device);
1219 entry->owner = THIS_MODULE;
1220 }
1221
1222 /* 'POST_info' [R] */
1223 entry =
1224 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1225 if (!entry)
1226 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1227 "Unable to create 'POST_info' fs entry\n"));
1228 else {
1229 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1230 entry->data = acpi_driver_data(device);
1231 entry->owner = THIS_MODULE;
1232 }
1233
1234 /* 'POST' [R/W] */
1235 entry =
1236 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1237 acpi_device_dir(device));
1238 if (!entry)
1239 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1240 "Unable to create 'POST' fs entry\n"));
1241 else {
1242 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1243 entry->proc_fops = &acpi_video_bus_POST_fops;
1244 entry->data = acpi_driver_data(device);
1245 entry->owner = THIS_MODULE;
1246 }
1247
1248 /* 'DOS' [R/W] */
1249 entry =
1250 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1251 acpi_device_dir(device));
1252 if (!entry)
1253 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1254 "Unable to create 'DOS' fs entry\n"));
1255 else {
1256 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1257 entry->proc_fops = &acpi_video_bus_DOS_fops;
1258 entry->data = acpi_driver_data(device);
1259 entry->owner = THIS_MODULE;
1260 }
1261
1262 return_VALUE(0);
1263 }
1264
1265 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1266 {
1267 struct acpi_video_bus *video;
1268
1269 ACPI_FUNCTION_TRACE("acpi_video_bus_remove_fs");
1270
1271 video = (struct acpi_video_bus *)acpi_driver_data(device);
1272
1273 if (acpi_device_dir(device)) {
1274 remove_proc_entry("info", acpi_device_dir(device));
1275 remove_proc_entry("ROM", acpi_device_dir(device));
1276 remove_proc_entry("POST_info", acpi_device_dir(device));
1277 remove_proc_entry("POST", acpi_device_dir(device));
1278 remove_proc_entry("DOS", acpi_device_dir(device));
1279 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1280 acpi_device_dir(device) = NULL;
1281 }
1282
1283 return_VALUE(0);
1284 }
1285
1286 /* --------------------------------------------------------------------------
1287 Driver Interface
1288 -------------------------------------------------------------------------- */
1289
1290 /* device interface */
1291
1292 static int
1293 acpi_video_bus_get_one_device(struct acpi_device *device,
1294 struct acpi_video_bus *video)
1295 {
1296 unsigned long device_id;
1297 int status, result;
1298 struct acpi_video_device *data;
1299
1300 ACPI_FUNCTION_TRACE("acpi_video_bus_get_one_device");
1301
1302 if (!device || !video)
1303 return_VALUE(-EINVAL);
1304
1305 status =
1306 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1307 if (ACPI_SUCCESS(status)) {
1308
1309 data = kmalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1310 if (!data)
1311 return_VALUE(-ENOMEM);
1312
1313 memset(data, 0, sizeof(struct acpi_video_device));
1314
1315 data->handle = device->handle;
1316 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1317 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1318 acpi_driver_data(device) = data;
1319
1320 data->device_id = device_id;
1321 data->video = video;
1322 data->dev = device;
1323
1324 switch (device_id & 0xffff) {
1325 case 0x0100:
1326 data->flags.crt = 1;
1327 break;
1328 case 0x0400:
1329 data->flags.lcd = 1;
1330 break;
1331 case 0x0200:
1332 data->flags.tvout = 1;
1333 break;
1334 default:
1335 data->flags.unknown = 1;
1336 break;
1337 }
1338
1339 acpi_video_device_bind(video, data);
1340 acpi_video_device_find_cap(data);
1341
1342 status = acpi_install_notify_handler(data->handle,
1343 ACPI_DEVICE_NOTIFY,
1344 acpi_video_device_notify,
1345 data);
1346 if (ACPI_FAILURE(status)) {
1347 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1348 "Error installing notify handler\n"));
1349 result = -ENODEV;
1350 goto end;
1351 }
1352
1353 down(&video->sem);
1354 list_add_tail(&data->entry, &video->video_device_list);
1355 up(&video->sem);
1356
1357 acpi_video_device_add_fs(device);
1358
1359 return_VALUE(0);
1360 }
1361
1362 end:
1363 return_VALUE(-ENOENT);
1364 }
1365
1366 /*
1367 * Arg:
1368 * video : video bus device
1369 *
1370 * Return:
1371 * none
1372 *
1373 * Enumerate the video device list of the video bus,
1374 * bind the ids with the corresponding video devices
1375 * under the video bus.
1376 */
1377
1378 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1379 {
1380 struct list_head *node, *next;
1381 list_for_each_safe(node, next, &video->video_device_list) {
1382 struct acpi_video_device *dev =
1383 container_of(node, struct acpi_video_device, entry);
1384 acpi_video_device_bind(video, dev);
1385 }
1386 }
1387
1388 /*
1389 * Arg:
1390 * video : video bus device
1391 * device : video output device under the video
1392 * bus
1393 *
1394 * Return:
1395 * none
1396 *
1397 * Bind the ids with the corresponding video devices
1398 * under the video bus.
1399 */
1400
1401 static void
1402 acpi_video_device_bind(struct acpi_video_bus *video,
1403 struct acpi_video_device *device)
1404 {
1405 int i;
1406 ACPI_FUNCTION_TRACE("acpi_video_device_bind");
1407
1408 #define IDS_VAL(i) video->attached_array[i].value.int_val
1409 #define IDS_BIND(i) video->attached_array[i].bind_info
1410
1411 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1412 i < video->attached_count; i++) {
1413 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1414 IDS_BIND(i) = device;
1415 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1416 }
1417 }
1418 #undef IDS_VAL
1419 #undef IDS_BIND
1420 }
1421
1422 /*
1423 * Arg:
1424 * video : video bus device
1425 *
1426 * Return:
1427 * < 0 : error
1428 *
1429 * Call _DOD to enumerate all devices attached to display adapter
1430 *
1431 */
1432
1433 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1434 {
1435 int status;
1436 int count;
1437 int i;
1438 struct acpi_video_enumerated_device *active_device_list;
1439 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1440 union acpi_object *dod = NULL;
1441 union acpi_object *obj;
1442
1443 ACPI_FUNCTION_TRACE("acpi_video_device_enumerate");
1444
1445 status = acpi_evaluate_object(video->handle, "_DOD", NULL, &buffer);
1446 if (!ACPI_SUCCESS(status)) {
1447 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _DOD\n"));
1448 return_VALUE(status);
1449 }
1450
1451 dod = (union acpi_object *)buffer.pointer;
1452 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1453 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DOD data\n"));
1454 status = -EFAULT;
1455 goto out;
1456 }
1457
1458 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1459 dod->package.count));
1460
1461 active_device_list = kmalloc((1 +
1462 dod->package.count) *
1463 sizeof(struct
1464 acpi_video_enumerated_device),
1465 GFP_KERNEL);
1466
1467 if (!active_device_list) {
1468 status = -ENOMEM;
1469 goto out;
1470 }
1471
1472 count = 0;
1473 for (i = 0; i < dod->package.count; i++) {
1474 obj = (union acpi_object *)&dod->package.elements[i];
1475
1476 if (obj->type != ACPI_TYPE_INTEGER) {
1477 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1478 "Invalid _DOD data\n"));
1479 active_device_list[i].value.int_val =
1480 ACPI_VIDEO_HEAD_INVALID;
1481 }
1482 active_device_list[i].value.int_val = obj->integer.value;
1483 active_device_list[i].bind_info = NULL;
1484 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1485 (int)obj->integer.value));
1486 count++;
1487 }
1488 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1489
1490 kfree(video->attached_array);
1491
1492 video->attached_array = active_device_list;
1493 video->attached_count = count;
1494 out:
1495 acpi_os_free(buffer.pointer);
1496 return_VALUE(status);
1497 }
1498
1499 /*
1500 * Arg:
1501 * video : video bus device
1502 * event : Nontify Event
1503 *
1504 * Return:
1505 * < 0 : error
1506 *
1507 * 1. Find out the current active output device.
1508 * 2. Identify the next output device to switch
1509 * 3. call _DSS to do actual switch.
1510 */
1511
1512 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1513 {
1514 struct list_head *node, *next;
1515 struct acpi_video_device *dev = NULL;
1516 struct acpi_video_device *dev_next = NULL;
1517 struct acpi_video_device *dev_prev = NULL;
1518 unsigned long state;
1519 int status = 0;
1520
1521 ACPI_FUNCTION_TRACE("acpi_video_switch_output");
1522
1523 list_for_each_safe(node, next, &video->video_device_list) {
1524 dev = container_of(node, struct acpi_video_device, entry);
1525 status = acpi_video_device_get_state(dev, &state);
1526 if (state & 0x2) {
1527 dev_next =
1528 container_of(node->next, struct acpi_video_device,
1529 entry);
1530 dev_prev =
1531 container_of(node->prev, struct acpi_video_device,
1532 entry);
1533 goto out;
1534 }
1535 }
1536 dev_next = container_of(node->next, struct acpi_video_device, entry);
1537 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1538 out:
1539 switch (event) {
1540 case ACPI_VIDEO_NOTIFY_CYCLE:
1541 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1542 acpi_video_device_set_state(dev, 0);
1543 acpi_video_device_set_state(dev_next, 0x80000001);
1544 break;
1545 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1546 acpi_video_device_set_state(dev, 0);
1547 acpi_video_device_set_state(dev_prev, 0x80000001);
1548 default:
1549 break;
1550 }
1551
1552 return_VALUE(status);
1553 }
1554
1555 static int
1556 acpi_video_get_next_level(struct acpi_video_device *device,
1557 u32 level_current, u32 event)
1558 {
1559 /*Fix me */
1560 return level_current;
1561 }
1562
1563 static void
1564 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1565 {
1566 unsigned long level_current, level_next;
1567 acpi_video_device_lcd_get_level_current(device, &level_current);
1568 level_next = acpi_video_get_next_level(device, level_current, event);
1569 acpi_video_device_lcd_set_level(device, level_next);
1570 }
1571
1572 static int
1573 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1574 struct acpi_device *device)
1575 {
1576 int status = 0;
1577 struct list_head *node, *next;
1578
1579 ACPI_FUNCTION_TRACE("acpi_video_get_devices");
1580
1581 acpi_video_device_enumerate(video);
1582
1583 list_for_each_safe(node, next, &device->children) {
1584 struct acpi_device *dev =
1585 list_entry(node, struct acpi_device, node);
1586
1587 if (!dev)
1588 continue;
1589
1590 status = acpi_video_bus_get_one_device(dev, video);
1591 if (ACPI_FAILURE(status)) {
1592 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1593 "Cant attach device\n"));
1594 continue;
1595 }
1596
1597 }
1598 return_VALUE(status);
1599 }
1600
1601 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1602 {
1603 acpi_status status;
1604 struct acpi_video_bus *video;
1605
1606 ACPI_FUNCTION_TRACE("acpi_video_bus_put_one_device");
1607
1608 if (!device || !device->video)
1609 return_VALUE(-ENOENT);
1610
1611 video = device->video;
1612
1613 down(&video->sem);
1614 list_del(&device->entry);
1615 up(&video->sem);
1616 acpi_video_device_remove_fs(device->dev);
1617
1618 status = acpi_remove_notify_handler(device->handle,
1619 ACPI_DEVICE_NOTIFY,
1620 acpi_video_device_notify);
1621 if (ACPI_FAILURE(status))
1622 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1623 "Error removing notify handler\n"));
1624
1625 return_VALUE(0);
1626 }
1627
1628 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1629 {
1630 int status;
1631 struct list_head *node, *next;
1632
1633 ACPI_FUNCTION_TRACE("acpi_video_bus_put_devices");
1634
1635 list_for_each_safe(node, next, &video->video_device_list) {
1636 struct acpi_video_device *data =
1637 list_entry(node, struct acpi_video_device, entry);
1638 if (!data)
1639 continue;
1640
1641 status = acpi_video_bus_put_one_device(data);
1642 if (ACPI_FAILURE(status))
1643 printk(KERN_WARNING PREFIX
1644 "hhuuhhuu bug in acpi video driver.\n");
1645
1646 kfree(data->brightness);
1647
1648 kfree(data);
1649 }
1650
1651 return_VALUE(0);
1652 }
1653
1654 /* acpi_video interface */
1655
1656 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1657 {
1658 return acpi_video_bus_DOS(video, 1, 0);
1659 }
1660
1661 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1662 {
1663 return acpi_video_bus_DOS(video, 0, 1);
1664 }
1665
1666 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1667 {
1668 struct acpi_video_bus *video = (struct acpi_video_bus *)data;
1669 struct acpi_device *device = NULL;
1670
1671 ACPI_FUNCTION_TRACE("acpi_video_bus_notify");
1672 printk("video bus notify\n");
1673
1674 if (!video)
1675 return_VOID;
1676
1677 if (acpi_bus_get_device(handle, &device))
1678 return_VOID;
1679
1680 switch (event) {
1681 case ACPI_VIDEO_NOTIFY_SWITCH: /* User request that a switch occur,
1682 * most likely via hotkey. */
1683 acpi_bus_generate_event(device, event, 0);
1684 break;
1685
1686 case ACPI_VIDEO_NOTIFY_PROBE: /* User plug or remove a video
1687 * connector. */
1688 acpi_video_device_enumerate(video);
1689 acpi_video_device_rebind(video);
1690 acpi_video_switch_output(video, event);
1691 acpi_bus_generate_event(device, event, 0);
1692 break;
1693
1694 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1695 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1696 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1697 acpi_video_switch_output(video, event);
1698 acpi_bus_generate_event(device, event, 0);
1699 break;
1700
1701 default:
1702 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1703 "Unsupported event [0x%x]\n", event));
1704 break;
1705 }
1706
1707 return_VOID;
1708 }
1709
1710 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1711 {
1712 struct acpi_video_device *video_device =
1713 (struct acpi_video_device *)data;
1714 struct acpi_device *device = NULL;
1715
1716 ACPI_FUNCTION_TRACE("acpi_video_device_notify");
1717
1718 printk("video device notify\n");
1719 if (!video_device)
1720 return_VOID;
1721
1722 if (acpi_bus_get_device(handle, &device))
1723 return_VOID;
1724
1725 switch (event) {
1726 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1727 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1728 acpi_bus_generate_event(device, event, 0);
1729 break;
1730 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1731 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1732 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1733 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1734 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1735 acpi_video_switch_brightness(video_device, event);
1736 acpi_bus_generate_event(device, event, 0);
1737 break;
1738 default:
1739 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1740 "Unsupported event [0x%x]\n", event));
1741 break;
1742 }
1743 return_VOID;
1744 }
1745
1746 static int acpi_video_bus_add(struct acpi_device *device)
1747 {
1748 int result = 0;
1749 acpi_status status = 0;
1750 struct acpi_video_bus *video = NULL;
1751
1752 ACPI_FUNCTION_TRACE("acpi_video_bus_add");
1753
1754 if (!device)
1755 return_VALUE(-EINVAL);
1756
1757 video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1758 if (!video)
1759 return_VALUE(-ENOMEM);
1760 memset(video, 0, sizeof(struct acpi_video_bus));
1761
1762 video->handle = device->handle;
1763 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1764 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1765 acpi_driver_data(device) = video;
1766
1767 acpi_video_bus_find_cap(video);
1768 result = acpi_video_bus_check(video);
1769 if (result)
1770 goto end;
1771
1772 result = acpi_video_bus_add_fs(device);
1773 if (result)
1774 goto end;
1775
1776 init_MUTEX(&video->sem);
1777 INIT_LIST_HEAD(&video->video_device_list);
1778
1779 acpi_video_bus_get_devices(video, device);
1780 acpi_video_bus_start_devices(video);
1781
1782 status = acpi_install_notify_handler(video->handle,
1783 ACPI_DEVICE_NOTIFY,
1784 acpi_video_bus_notify, video);
1785 if (ACPI_FAILURE(status)) {
1786 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1787 "Error installing notify handler\n"));
1788 result = -ENODEV;
1789 goto end;
1790 }
1791
1792 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1793 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1794 video->flags.multihead ? "yes" : "no",
1795 video->flags.rom ? "yes" : "no",
1796 video->flags.post ? "yes" : "no");
1797
1798 end:
1799 if (result) {
1800 acpi_video_bus_remove_fs(device);
1801 kfree(video);
1802 }
1803
1804 return_VALUE(result);
1805 }
1806
1807 static int acpi_video_bus_remove(struct acpi_device *device, int type)
1808 {
1809 acpi_status status = 0;
1810 struct acpi_video_bus *video = NULL;
1811
1812 ACPI_FUNCTION_TRACE("acpi_video_bus_remove");
1813
1814 if (!device || !acpi_driver_data(device))
1815 return_VALUE(-EINVAL);
1816
1817 video = (struct acpi_video_bus *)acpi_driver_data(device);
1818
1819 acpi_video_bus_stop_devices(video);
1820
1821 status = acpi_remove_notify_handler(video->handle,
1822 ACPI_DEVICE_NOTIFY,
1823 acpi_video_bus_notify);
1824 if (ACPI_FAILURE(status))
1825 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1826 "Error removing notify handler\n"));
1827
1828 acpi_video_bus_put_devices(video);
1829 acpi_video_bus_remove_fs(device);
1830
1831 kfree(video->attached_array);
1832 kfree(video);
1833
1834 return_VALUE(0);
1835 }
1836
1837 static int
1838 acpi_video_bus_match(struct acpi_device *device, struct acpi_driver *driver)
1839 {
1840 acpi_handle h_dummy1;
1841 acpi_handle h_dummy2;
1842 acpi_handle h_dummy3;
1843
1844 ACPI_FUNCTION_TRACE("acpi_video_bus_match");
1845
1846 if (!device || !driver)
1847 return_VALUE(-EINVAL);
1848
1849 /* Since there is no HID, CID for ACPI Video drivers, we have
1850 * to check well known required nodes for each feature we support.
1851 */
1852
1853 /* Does this device able to support video switching ? */
1854 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
1855 ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
1856 return_VALUE(0);
1857
1858 /* Does this device able to retrieve a video ROM ? */
1859 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
1860 return_VALUE(0);
1861
1862 /* Does this device able to configure which video head to be POSTed ? */
1863 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
1864 ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
1865 ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
1866 return_VALUE(0);
1867
1868 return_VALUE(-ENODEV);
1869 }
1870
1871 static int __init acpi_video_init(void)
1872 {
1873 int result = 0;
1874
1875 ACPI_FUNCTION_TRACE("acpi_video_init");
1876
1877 /*
1878 acpi_dbg_level = 0xFFFFFFFF;
1879 acpi_dbg_layer = 0x08000000;
1880 */
1881
1882 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1883 if (!acpi_video_dir)
1884 return_VALUE(-ENODEV);
1885 acpi_video_dir->owner = THIS_MODULE;
1886
1887 result = acpi_bus_register_driver(&acpi_video_bus);
1888 if (result < 0) {
1889 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1890 return_VALUE(-ENODEV);
1891 }
1892
1893 return_VALUE(0);
1894 }
1895
1896 static void __exit acpi_video_exit(void)
1897 {
1898 ACPI_FUNCTION_TRACE("acpi_video_exit");
1899
1900 acpi_bus_unregister_driver(&acpi_video_bus);
1901
1902 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1903
1904 return_VOID;
1905 }
1906
1907 module_init(acpi_video_init);
1908 module_exit(acpi_video_exit);
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