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ACPI: autoload modules - Create __mod_acpi_device_table symbol for all ACPI drivers
[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 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/proc_fs.h>
33 #include <linux/seq_file.h>
34
35 #include <linux/backlight.h>
36 #include <linux/video_output.h>
37 #include <asm/uaccess.h>
38
39 #include <acpi/acpi_bus.h>
40 #include <acpi/acpi_drivers.h>
41
42 #define ACPI_VIDEO_COMPONENT 0x08000000
43 #define ACPI_VIDEO_CLASS "video"
44 #define ACPI_VIDEO_BUS_NAME "Video Bus"
45 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
46 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
47 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
48 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
49 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
50 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
51
52 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
53 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
54 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
55 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
56 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
57
58 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
59 #define ACPI_VIDEO_HEAD_END (~0u)
60 #define MAX_NAME_LEN 20
61
62 #define ACPI_VIDEO_DISPLAY_CRT 1
63 #define ACPI_VIDEO_DISPLAY_TV 2
64 #define ACPI_VIDEO_DISPLAY_DVI 3
65 #define ACPI_VIDEO_DISPLAY_LCD 4
66
67 #define _COMPONENT ACPI_VIDEO_COMPONENT
68 ACPI_MODULE_NAME("video");
69
70 MODULE_AUTHOR("Bruno Ducrot");
71 MODULE_DESCRIPTION("ACPI Video Driver");
72 MODULE_LICENSE("GPL");
73
74 static int acpi_video_bus_add(struct acpi_device *device);
75 static int acpi_video_bus_remove(struct acpi_device *device, int type);
76
77 static const struct acpi_device_id video_device_ids[] = {
78 {ACPI_VIDEO_HID, 0},
79 {"", 0},
80 };
81 MODULE_DEVICE_TABLE(acpi, video_device_ids);
82
83 static struct acpi_driver acpi_video_bus = {
84 .name = "video",
85 .class = ACPI_VIDEO_CLASS,
86 .ids = video_device_ids,
87 .ops = {
88 .add = acpi_video_bus_add,
89 .remove = acpi_video_bus_remove,
90 },
91 };
92
93 struct acpi_video_bus_flags {
94 u8 multihead:1; /* can switch video heads */
95 u8 rom:1; /* can retrieve a video rom */
96 u8 post:1; /* can configure the head to */
97 u8 reserved:5;
98 };
99
100 struct acpi_video_bus_cap {
101 u8 _DOS:1; /*Enable/Disable output switching */
102 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
103 u8 _ROM:1; /*Get ROM Data */
104 u8 _GPD:1; /*Get POST Device */
105 u8 _SPD:1; /*Set POST Device */
106 u8 _VPO:1; /*Video POST Options */
107 u8 reserved:2;
108 };
109
110 struct acpi_video_device_attrib {
111 u32 display_index:4; /* A zero-based instance of the Display */
112 u32 display_port_attachment:4; /*This field differentiates the display type */
113 u32 display_type:4; /*Describe the specific type in use */
114 u32 vendor_specific:4; /*Chipset Vendor Specific */
115 u32 bios_can_detect:1; /*BIOS can detect the device */
116 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
117 the VGA device. */
118 u32 pipe_id:3; /*For VGA multiple-head devices. */
119 u32 reserved:10; /*Must be 0 */
120 u32 device_id_scheme:1; /*Device ID Scheme */
121 };
122
123 struct acpi_video_enumerated_device {
124 union {
125 u32 int_val;
126 struct acpi_video_device_attrib attrib;
127 } value;
128 struct acpi_video_device *bind_info;
129 };
130
131 struct acpi_video_bus {
132 struct acpi_device *device;
133 u8 dos_setting;
134 struct acpi_video_enumerated_device *attached_array;
135 u8 attached_count;
136 struct acpi_video_bus_cap cap;
137 struct acpi_video_bus_flags flags;
138 struct semaphore sem;
139 struct list_head video_device_list;
140 struct proc_dir_entry *dir;
141 };
142
143 struct acpi_video_device_flags {
144 u8 crt:1;
145 u8 lcd:1;
146 u8 tvout:1;
147 u8 dvi:1;
148 u8 bios:1;
149 u8 unknown:1;
150 u8 reserved:2;
151 };
152
153 struct acpi_video_device_cap {
154 u8 _ADR:1; /*Return the unique ID */
155 u8 _BCL:1; /*Query list of brightness control levels supported */
156 u8 _BCM:1; /*Set the brightness level */
157 u8 _BQC:1; /* Get current brightness level */
158 u8 _DDC:1; /*Return the EDID for this device */
159 u8 _DCS:1; /*Return status of output device */
160 u8 _DGS:1; /*Query graphics state */
161 u8 _DSS:1; /*Device state set */
162 };
163
164 struct acpi_video_device_brightness {
165 int curr;
166 int count;
167 int *levels;
168 };
169
170 struct acpi_video_device {
171 unsigned long device_id;
172 struct acpi_video_device_flags flags;
173 struct acpi_video_device_cap cap;
174 struct list_head entry;
175 struct acpi_video_bus *video;
176 struct acpi_device *dev;
177 struct acpi_video_device_brightness *brightness;
178 struct backlight_device *backlight;
179 struct output_device *output_dev;
180 };
181
182 /* bus */
183 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
184 static struct file_operations acpi_video_bus_info_fops = {
185 .open = acpi_video_bus_info_open_fs,
186 .read = seq_read,
187 .llseek = seq_lseek,
188 .release = single_release,
189 };
190
191 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
192 static struct file_operations acpi_video_bus_ROM_fops = {
193 .open = acpi_video_bus_ROM_open_fs,
194 .read = seq_read,
195 .llseek = seq_lseek,
196 .release = single_release,
197 };
198
199 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
200 struct file *file);
201 static struct file_operations acpi_video_bus_POST_info_fops = {
202 .open = acpi_video_bus_POST_info_open_fs,
203 .read = seq_read,
204 .llseek = seq_lseek,
205 .release = single_release,
206 };
207
208 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
209 static struct file_operations acpi_video_bus_POST_fops = {
210 .open = acpi_video_bus_POST_open_fs,
211 .read = seq_read,
212 .llseek = seq_lseek,
213 .release = single_release,
214 };
215
216 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
217 static struct file_operations acpi_video_bus_DOS_fops = {
218 .open = acpi_video_bus_DOS_open_fs,
219 .read = seq_read,
220 .llseek = seq_lseek,
221 .release = single_release,
222 };
223
224 /* device */
225 static int acpi_video_device_info_open_fs(struct inode *inode,
226 struct file *file);
227 static struct file_operations acpi_video_device_info_fops = {
228 .open = acpi_video_device_info_open_fs,
229 .read = seq_read,
230 .llseek = seq_lseek,
231 .release = single_release,
232 };
233
234 static int acpi_video_device_state_open_fs(struct inode *inode,
235 struct file *file);
236 static struct file_operations acpi_video_device_state_fops = {
237 .open = acpi_video_device_state_open_fs,
238 .read = seq_read,
239 .llseek = seq_lseek,
240 .release = single_release,
241 };
242
243 static int acpi_video_device_brightness_open_fs(struct inode *inode,
244 struct file *file);
245 static struct file_operations acpi_video_device_brightness_fops = {
246 .open = acpi_video_device_brightness_open_fs,
247 .read = seq_read,
248 .llseek = seq_lseek,
249 .release = single_release,
250 };
251
252 static int acpi_video_device_EDID_open_fs(struct inode *inode,
253 struct file *file);
254 static struct file_operations acpi_video_device_EDID_fops = {
255 .open = acpi_video_device_EDID_open_fs,
256 .read = seq_read,
257 .llseek = seq_lseek,
258 .release = single_release,
259 };
260
261 static char device_decode[][30] = {
262 "motherboard VGA device",
263 "PCI VGA device",
264 "AGP VGA device",
265 "UNKNOWN",
266 };
267
268 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
269 static void acpi_video_device_rebind(struct acpi_video_bus *video);
270 static void acpi_video_device_bind(struct acpi_video_bus *video,
271 struct acpi_video_device *device);
272 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
273 static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
274 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
275 int level);
276 static int acpi_video_device_lcd_get_level_current(
277 struct acpi_video_device *device,
278 unsigned long *level);
279 static int acpi_video_get_next_level(struct acpi_video_device *device,
280 u32 level_current, u32 event);
281 static void acpi_video_switch_brightness(struct acpi_video_device *device,
282 int event);
283 static int acpi_video_device_get_state(struct acpi_video_device *device,
284 unsigned long *state);
285 static int acpi_video_output_get(struct output_device *od);
286 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
287
288 /*backlight device sysfs support*/
289 static int acpi_video_get_brightness(struct backlight_device *bd)
290 {
291 unsigned long cur_level;
292 struct acpi_video_device *vd =
293 (struct acpi_video_device *)bl_get_data(bd);
294 acpi_video_device_lcd_get_level_current(vd, &cur_level);
295 return (int) cur_level;
296 }
297
298 static int acpi_video_set_brightness(struct backlight_device *bd)
299 {
300 int request_level = bd->props.brightness;
301 struct acpi_video_device *vd =
302 (struct acpi_video_device *)bl_get_data(bd);
303 acpi_video_device_lcd_set_level(vd, request_level);
304 return 0;
305 }
306
307 static struct backlight_ops acpi_backlight_ops = {
308 .get_brightness = acpi_video_get_brightness,
309 .update_status = acpi_video_set_brightness,
310 };
311
312 /*video output device sysfs support*/
313 static int acpi_video_output_get(struct output_device *od)
314 {
315 unsigned long state;
316 struct acpi_video_device *vd =
317 (struct acpi_video_device *)class_get_devdata(&od->class_dev);
318 acpi_video_device_get_state(vd, &state);
319 return (int)state;
320 }
321
322 static int acpi_video_output_set(struct output_device *od)
323 {
324 unsigned long state = od->request_state;
325 struct acpi_video_device *vd=
326 (struct acpi_video_device *)class_get_devdata(&od->class_dev);
327 return acpi_video_device_set_state(vd, state);
328 }
329
330 static struct output_properties acpi_output_properties = {
331 .set_state = acpi_video_output_set,
332 .get_status = acpi_video_output_get,
333 };
334 /* --------------------------------------------------------------------------
335 Video Management
336 -------------------------------------------------------------------------- */
337
338 /* device */
339
340 static int
341 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
342 {
343 int status;
344
345 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
346
347 return status;
348 }
349
350 static int
351 acpi_video_device_get_state(struct acpi_video_device *device,
352 unsigned long *state)
353 {
354 int status;
355
356 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
357
358 return status;
359 }
360
361 static int
362 acpi_video_device_set_state(struct acpi_video_device *device, int state)
363 {
364 int status;
365 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
366 struct acpi_object_list args = { 1, &arg0 };
367 unsigned long ret;
368
369
370 arg0.integer.value = state;
371 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
372
373 return status;
374 }
375
376 static int
377 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
378 union acpi_object **levels)
379 {
380 int status;
381 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
382 union acpi_object *obj;
383
384
385 *levels = NULL;
386
387 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
388 if (!ACPI_SUCCESS(status))
389 return status;
390 obj = (union acpi_object *)buffer.pointer;
391 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
392 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
393 status = -EFAULT;
394 goto err;
395 }
396
397 *levels = obj;
398
399 return 0;
400
401 err:
402 kfree(buffer.pointer);
403
404 return status;
405 }
406
407 static int
408 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
409 {
410 int status;
411 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
412 struct acpi_object_list args = { 1, &arg0 };
413
414
415 arg0.integer.value = level;
416 status = acpi_evaluate_object(device->dev->handle, "_BCM", &args, NULL);
417
418 printk(KERN_DEBUG "set_level status: %x\n", status);
419 return status;
420 }
421
422 static int
423 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
424 unsigned long *level)
425 {
426 int status;
427
428 status = acpi_evaluate_integer(device->dev->handle, "_BQC", NULL, level);
429
430 return status;
431 }
432
433 static int
434 acpi_video_device_EDID(struct acpi_video_device *device,
435 union acpi_object **edid, ssize_t length)
436 {
437 int status;
438 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
439 union acpi_object *obj;
440 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
441 struct acpi_object_list args = { 1, &arg0 };
442
443
444 *edid = NULL;
445
446 if (!device)
447 return -ENODEV;
448 if (length == 128)
449 arg0.integer.value = 1;
450 else if (length == 256)
451 arg0.integer.value = 2;
452 else
453 return -EINVAL;
454
455 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
456 if (ACPI_FAILURE(status))
457 return -ENODEV;
458
459 obj = buffer.pointer;
460
461 if (obj && obj->type == ACPI_TYPE_BUFFER)
462 *edid = obj;
463 else {
464 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
465 status = -EFAULT;
466 kfree(obj);
467 }
468
469 return status;
470 }
471
472 /* bus */
473
474 static int
475 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
476 {
477 int status;
478 unsigned long tmp;
479 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
480 struct acpi_object_list args = { 1, &arg0 };
481
482
483 arg0.integer.value = option;
484
485 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
486 if (ACPI_SUCCESS(status))
487 status = tmp ? (-EINVAL) : (AE_OK);
488
489 return status;
490 }
491
492 static int
493 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
494 {
495 int status;
496
497 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
498
499 return status;
500 }
501
502 static int
503 acpi_video_bus_POST_options(struct acpi_video_bus *video,
504 unsigned long *options)
505 {
506 int status;
507
508 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
509 *options &= 3;
510
511 return status;
512 }
513
514 /*
515 * Arg:
516 * video : video bus device pointer
517 * bios_flag :
518 * 0. The system BIOS should NOT automatically switch(toggle)
519 * the active display output.
520 * 1. The system BIOS should automatically switch (toggle) the
521 * active display output. No switch event.
522 * 2. The _DGS value should be locked.
523 * 3. The system BIOS should not automatically switch (toggle) the
524 * active display output, but instead generate the display switch
525 * event notify code.
526 * lcd_flag :
527 * 0. The system BIOS should automatically control the brightness level
528 * of the LCD when the power changes from AC to DC
529 * 1. The system BIOS should NOT automatically control the brightness
530 * level of the LCD when the power changes from AC to DC.
531 * Return Value:
532 * -1 wrong arg.
533 */
534
535 static int
536 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
537 {
538 acpi_integer status = 0;
539 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
540 struct acpi_object_list args = { 1, &arg0 };
541
542
543 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
544 status = -1;
545 goto Failed;
546 }
547 arg0.integer.value = (lcd_flag << 2) | bios_flag;
548 video->dos_setting = arg0.integer.value;
549 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
550
551 Failed:
552 return status;
553 }
554
555 /*
556 * Arg:
557 * device : video output device (LCD, CRT, ..)
558 *
559 * Return Value:
560 * None
561 *
562 * Find out all required AML methods defined under the output
563 * device.
564 */
565
566 static void acpi_video_device_find_cap(struct acpi_video_device *device)
567 {
568 acpi_handle h_dummy1;
569 int i;
570 u32 max_level = 0;
571 union acpi_object *obj = NULL;
572 struct acpi_video_device_brightness *br = NULL;
573
574
575 memset(&device->cap, 0, 4);
576
577 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
578 device->cap._ADR = 1;
579 }
580 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
581 device->cap._BCL = 1;
582 }
583 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
584 device->cap._BCM = 1;
585 }
586 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
587 device->cap._BQC = 1;
588 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
589 device->cap._DDC = 1;
590 }
591 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
592 device->cap._DCS = 1;
593 }
594 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
595 device->cap._DGS = 1;
596 }
597 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
598 device->cap._DSS = 1;
599 }
600
601 if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
602
603 if (obj->package.count >= 2) {
604 int count = 0;
605 union acpi_object *o;
606
607 br = kzalloc(sizeof(*br), GFP_KERNEL);
608 if (!br) {
609 printk(KERN_ERR "can't allocate memory\n");
610 } else {
611 br->levels = kmalloc(obj->package.count *
612 sizeof *(br->levels), GFP_KERNEL);
613 if (!br->levels)
614 goto out;
615
616 for (i = 0; i < obj->package.count; i++) {
617 o = (union acpi_object *)&obj->package.
618 elements[i];
619 if (o->type != ACPI_TYPE_INTEGER) {
620 printk(KERN_ERR PREFIX "Invalid data\n");
621 continue;
622 }
623 br->levels[count] = (u32) o->integer.value;
624
625 if (br->levels[count] > max_level)
626 max_level = br->levels[count];
627 count++;
628 }
629 out:
630 if (count < 2) {
631 kfree(br->levels);
632 kfree(br);
633 } else {
634 br->count = count;
635 device->brightness = br;
636 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
637 "found %d brightness levels\n",
638 count));
639 }
640 }
641 }
642
643 } else {
644 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
645 }
646
647 kfree(obj);
648
649 if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
650 unsigned long tmp;
651 static int count = 0;
652 char *name;
653 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
654 if (!name)
655 return;
656
657 sprintf(name, "acpi_video%d", count++);
658 acpi_video_device_lcd_get_level_current(device, &tmp);
659 device->backlight = backlight_device_register(name,
660 NULL, device, &acpi_backlight_ops);
661 device->backlight->props.max_brightness = max_level;
662 device->backlight->props.brightness = (int)tmp;
663 backlight_update_status(device->backlight);
664
665 kfree(name);
666 }
667 if (device->cap._DCS && device->cap._DSS){
668 static int count = 0;
669 char *name;
670 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
671 if (!name)
672 return;
673 sprintf(name, "acpi_video%d", count++);
674 device->output_dev = video_output_register(name,
675 NULL, device, &acpi_output_properties);
676 kfree(name);
677 }
678 return;
679 }
680
681 /*
682 * Arg:
683 * device : video output device (VGA)
684 *
685 * Return Value:
686 * None
687 *
688 * Find out all required AML methods defined under the video bus device.
689 */
690
691 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
692 {
693 acpi_handle h_dummy1;
694
695 memset(&video->cap, 0, 4);
696 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
697 video->cap._DOS = 1;
698 }
699 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
700 video->cap._DOD = 1;
701 }
702 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
703 video->cap._ROM = 1;
704 }
705 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
706 video->cap._GPD = 1;
707 }
708 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
709 video->cap._SPD = 1;
710 }
711 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
712 video->cap._VPO = 1;
713 }
714 }
715
716 /*
717 * Check whether the video bus device has required AML method to
718 * support the desired features
719 */
720
721 static int acpi_video_bus_check(struct acpi_video_bus *video)
722 {
723 acpi_status status = -ENOENT;
724
725
726 if (!video)
727 return -EINVAL;
728
729 /* Since there is no HID, CID and so on for VGA driver, we have
730 * to check well known required nodes.
731 */
732
733 /* Does this device support video switching? */
734 if (video->cap._DOS) {
735 video->flags.multihead = 1;
736 status = 0;
737 }
738
739 /* Does this device support retrieving a video ROM? */
740 if (video->cap._ROM) {
741 video->flags.rom = 1;
742 status = 0;
743 }
744
745 /* Does this device support configuring which video device to POST? */
746 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
747 video->flags.post = 1;
748 status = 0;
749 }
750
751 return status;
752 }
753
754 /* --------------------------------------------------------------------------
755 FS Interface (/proc)
756 -------------------------------------------------------------------------- */
757
758 static struct proc_dir_entry *acpi_video_dir;
759
760 /* video devices */
761
762 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
763 {
764 struct acpi_video_device *dev = seq->private;
765
766
767 if (!dev)
768 goto end;
769
770 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
771 seq_printf(seq, "type: ");
772 if (dev->flags.crt)
773 seq_printf(seq, "CRT\n");
774 else if (dev->flags.lcd)
775 seq_printf(seq, "LCD\n");
776 else if (dev->flags.tvout)
777 seq_printf(seq, "TVOUT\n");
778 else if (dev->flags.dvi)
779 seq_printf(seq, "DVI\n");
780 else
781 seq_printf(seq, "UNKNOWN\n");
782
783 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
784
785 end:
786 return 0;
787 }
788
789 static int
790 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
791 {
792 return single_open(file, acpi_video_device_info_seq_show,
793 PDE(inode)->data);
794 }
795
796 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
797 {
798 int status;
799 struct acpi_video_device *dev = seq->private;
800 unsigned long state;
801
802
803 if (!dev)
804 goto end;
805
806 status = acpi_video_device_get_state(dev, &state);
807 seq_printf(seq, "state: ");
808 if (ACPI_SUCCESS(status))
809 seq_printf(seq, "0x%02lx\n", state);
810 else
811 seq_printf(seq, "<not supported>\n");
812
813 status = acpi_video_device_query(dev, &state);
814 seq_printf(seq, "query: ");
815 if (ACPI_SUCCESS(status))
816 seq_printf(seq, "0x%02lx\n", state);
817 else
818 seq_printf(seq, "<not supported>\n");
819
820 end:
821 return 0;
822 }
823
824 static int
825 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
826 {
827 return single_open(file, acpi_video_device_state_seq_show,
828 PDE(inode)->data);
829 }
830
831 static ssize_t
832 acpi_video_device_write_state(struct file *file,
833 const char __user * buffer,
834 size_t count, loff_t * data)
835 {
836 int status;
837 struct seq_file *m = file->private_data;
838 struct acpi_video_device *dev = m->private;
839 char str[12] = { 0 };
840 u32 state = 0;
841
842
843 if (!dev || count + 1 > sizeof str)
844 return -EINVAL;
845
846 if (copy_from_user(str, buffer, count))
847 return -EFAULT;
848
849 str[count] = 0;
850 state = simple_strtoul(str, NULL, 0);
851 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
852
853 status = acpi_video_device_set_state(dev, state);
854
855 if (status)
856 return -EFAULT;
857
858 return count;
859 }
860
861 static int
862 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
863 {
864 struct acpi_video_device *dev = seq->private;
865 int i;
866
867
868 if (!dev || !dev->brightness) {
869 seq_printf(seq, "<not supported>\n");
870 return 0;
871 }
872
873 seq_printf(seq, "levels: ");
874 for (i = 0; i < dev->brightness->count; i++)
875 seq_printf(seq, " %d", dev->brightness->levels[i]);
876 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
877
878 return 0;
879 }
880
881 static int
882 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
883 {
884 return single_open(file, acpi_video_device_brightness_seq_show,
885 PDE(inode)->data);
886 }
887
888 static ssize_t
889 acpi_video_device_write_brightness(struct file *file,
890 const char __user * buffer,
891 size_t count, loff_t * data)
892 {
893 struct seq_file *m = file->private_data;
894 struct acpi_video_device *dev = m->private;
895 char str[4] = { 0 };
896 unsigned int level = 0;
897 int i;
898
899
900 if (!dev || !dev->brightness || count + 1 > sizeof str)
901 return -EINVAL;
902
903 if (copy_from_user(str, buffer, count))
904 return -EFAULT;
905
906 str[count] = 0;
907 level = simple_strtoul(str, NULL, 0);
908
909 if (level > 100)
910 return -EFAULT;
911
912 /* validate through the list of available levels */
913 for (i = 0; i < dev->brightness->count; i++)
914 if (level == dev->brightness->levels[i]) {
915 if (ACPI_SUCCESS
916 (acpi_video_device_lcd_set_level(dev, level)))
917 dev->brightness->curr = level;
918 break;
919 }
920
921 return count;
922 }
923
924 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
925 {
926 struct acpi_video_device *dev = seq->private;
927 int status;
928 int i;
929 union acpi_object *edid = NULL;
930
931
932 if (!dev)
933 goto out;
934
935 status = acpi_video_device_EDID(dev, &edid, 128);
936 if (ACPI_FAILURE(status)) {
937 status = acpi_video_device_EDID(dev, &edid, 256);
938 }
939
940 if (ACPI_FAILURE(status)) {
941 goto out;
942 }
943
944 if (edid && edid->type == ACPI_TYPE_BUFFER) {
945 for (i = 0; i < edid->buffer.length; i++)
946 seq_putc(seq, edid->buffer.pointer[i]);
947 }
948
949 out:
950 if (!edid)
951 seq_printf(seq, "<not supported>\n");
952 else
953 kfree(edid);
954
955 return 0;
956 }
957
958 static int
959 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
960 {
961 return single_open(file, acpi_video_device_EDID_seq_show,
962 PDE(inode)->data);
963 }
964
965 static int acpi_video_device_add_fs(struct acpi_device *device)
966 {
967 struct proc_dir_entry *entry = NULL;
968 struct acpi_video_device *vid_dev;
969
970
971 if (!device)
972 return -ENODEV;
973
974 vid_dev = acpi_driver_data(device);
975 if (!vid_dev)
976 return -ENODEV;
977
978 if (!acpi_device_dir(device)) {
979 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
980 vid_dev->video->dir);
981 if (!acpi_device_dir(device))
982 return -ENODEV;
983 acpi_device_dir(device)->owner = THIS_MODULE;
984 }
985
986 /* 'info' [R] */
987 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
988 if (!entry)
989 return -ENODEV;
990 else {
991 entry->proc_fops = &acpi_video_device_info_fops;
992 entry->data = acpi_driver_data(device);
993 entry->owner = THIS_MODULE;
994 }
995
996 /* 'state' [R/W] */
997 entry =
998 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
999 acpi_device_dir(device));
1000 if (!entry)
1001 return -ENODEV;
1002 else {
1003 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1004 entry->proc_fops = &acpi_video_device_state_fops;
1005 entry->data = acpi_driver_data(device);
1006 entry->owner = THIS_MODULE;
1007 }
1008
1009 /* 'brightness' [R/W] */
1010 entry =
1011 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1012 acpi_device_dir(device));
1013 if (!entry)
1014 return -ENODEV;
1015 else {
1016 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
1017 entry->proc_fops = &acpi_video_device_brightness_fops;
1018 entry->data = acpi_driver_data(device);
1019 entry->owner = THIS_MODULE;
1020 }
1021
1022 /* 'EDID' [R] */
1023 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
1024 if (!entry)
1025 return -ENODEV;
1026 else {
1027 entry->proc_fops = &acpi_video_device_EDID_fops;
1028 entry->data = acpi_driver_data(device);
1029 entry->owner = THIS_MODULE;
1030 }
1031
1032 return 0;
1033 }
1034
1035 static int acpi_video_device_remove_fs(struct acpi_device *device)
1036 {
1037 struct acpi_video_device *vid_dev;
1038
1039 vid_dev = acpi_driver_data(device);
1040 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1041 return -ENODEV;
1042
1043 if (acpi_device_dir(device)) {
1044 remove_proc_entry("info", acpi_device_dir(device));
1045 remove_proc_entry("state", acpi_device_dir(device));
1046 remove_proc_entry("brightness", acpi_device_dir(device));
1047 remove_proc_entry("EDID", acpi_device_dir(device));
1048 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1049 acpi_device_dir(device) = NULL;
1050 }
1051
1052 return 0;
1053 }
1054
1055 /* video bus */
1056 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1057 {
1058 struct acpi_video_bus *video = seq->private;
1059
1060
1061 if (!video)
1062 goto end;
1063
1064 seq_printf(seq, "Switching heads: %s\n",
1065 video->flags.multihead ? "yes" : "no");
1066 seq_printf(seq, "Video ROM: %s\n",
1067 video->flags.rom ? "yes" : "no");
1068 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1069 video->flags.post ? "yes" : "no");
1070
1071 end:
1072 return 0;
1073 }
1074
1075 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1076 {
1077 return single_open(file, acpi_video_bus_info_seq_show,
1078 PDE(inode)->data);
1079 }
1080
1081 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1082 {
1083 struct acpi_video_bus *video = seq->private;
1084
1085
1086 if (!video)
1087 goto end;
1088
1089 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1090 seq_printf(seq, "<TODO>\n");
1091
1092 end:
1093 return 0;
1094 }
1095
1096 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1097 {
1098 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1099 }
1100
1101 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1102 {
1103 struct acpi_video_bus *video = seq->private;
1104 unsigned long options;
1105 int status;
1106
1107
1108 if (!video)
1109 goto end;
1110
1111 status = acpi_video_bus_POST_options(video, &options);
1112 if (ACPI_SUCCESS(status)) {
1113 if (!(options & 1)) {
1114 printk(KERN_WARNING PREFIX
1115 "The motherboard VGA device is not listed as a possible POST device.\n");
1116 printk(KERN_WARNING PREFIX
1117 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1118 }
1119 printk("%lx\n", options);
1120 seq_printf(seq, "can POST: <integrated video>");
1121 if (options & 2)
1122 seq_printf(seq, " <PCI video>");
1123 if (options & 4)
1124 seq_printf(seq, " <AGP video>");
1125 seq_putc(seq, '\n');
1126 } else
1127 seq_printf(seq, "<not supported>\n");
1128 end:
1129 return 0;
1130 }
1131
1132 static int
1133 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1134 {
1135 return single_open(file, acpi_video_bus_POST_info_seq_show,
1136 PDE(inode)->data);
1137 }
1138
1139 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1140 {
1141 struct acpi_video_bus *video = seq->private;
1142 int status;
1143 unsigned long id;
1144
1145
1146 if (!video)
1147 goto end;
1148
1149 status = acpi_video_bus_get_POST(video, &id);
1150 if (!ACPI_SUCCESS(status)) {
1151 seq_printf(seq, "<not supported>\n");
1152 goto end;
1153 }
1154 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1155
1156 end:
1157 return 0;
1158 }
1159
1160 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1161 {
1162 struct acpi_video_bus *video = seq->private;
1163
1164
1165 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1166
1167 return 0;
1168 }
1169
1170 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1171 {
1172 return single_open(file, acpi_video_bus_POST_seq_show,
1173 PDE(inode)->data);
1174 }
1175
1176 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1177 {
1178 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1179 }
1180
1181 static ssize_t
1182 acpi_video_bus_write_POST(struct file *file,
1183 const char __user * buffer,
1184 size_t count, loff_t * data)
1185 {
1186 int status;
1187 struct seq_file *m = file->private_data;
1188 struct acpi_video_bus *video = m->private;
1189 char str[12] = { 0 };
1190 unsigned long opt, options;
1191
1192
1193 if (!video || count + 1 > sizeof str)
1194 return -EINVAL;
1195
1196 status = acpi_video_bus_POST_options(video, &options);
1197 if (!ACPI_SUCCESS(status))
1198 return -EINVAL;
1199
1200 if (copy_from_user(str, buffer, count))
1201 return -EFAULT;
1202
1203 str[count] = 0;
1204 opt = strtoul(str, NULL, 0);
1205 if (opt > 3)
1206 return -EFAULT;
1207
1208 /* just in case an OEM 'forgot' the motherboard... */
1209 options |= 1;
1210
1211 if (options & (1ul << opt)) {
1212 status = acpi_video_bus_set_POST(video, opt);
1213 if (!ACPI_SUCCESS(status))
1214 return -EFAULT;
1215
1216 }
1217
1218 return count;
1219 }
1220
1221 static ssize_t
1222 acpi_video_bus_write_DOS(struct file *file,
1223 const char __user * buffer,
1224 size_t count, loff_t * data)
1225 {
1226 int status;
1227 struct seq_file *m = file->private_data;
1228 struct acpi_video_bus *video = m->private;
1229 char str[12] = { 0 };
1230 unsigned long opt;
1231
1232
1233 if (!video || count + 1 > sizeof str)
1234 return -EINVAL;
1235
1236 if (copy_from_user(str, buffer, count))
1237 return -EFAULT;
1238
1239 str[count] = 0;
1240 opt = strtoul(str, NULL, 0);
1241 if (opt > 7)
1242 return -EFAULT;
1243
1244 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1245
1246 if (!ACPI_SUCCESS(status))
1247 return -EFAULT;
1248
1249 return count;
1250 }
1251
1252 static int acpi_video_bus_add_fs(struct acpi_device *device)
1253 {
1254 struct proc_dir_entry *entry = NULL;
1255 struct acpi_video_bus *video;
1256
1257
1258 video = acpi_driver_data(device);
1259
1260 if (!acpi_device_dir(device)) {
1261 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1262 acpi_video_dir);
1263 if (!acpi_device_dir(device))
1264 return -ENODEV;
1265 video->dir = acpi_device_dir(device);
1266 acpi_device_dir(device)->owner = THIS_MODULE;
1267 }
1268
1269 /* 'info' [R] */
1270 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1271 if (!entry)
1272 return -ENODEV;
1273 else {
1274 entry->proc_fops = &acpi_video_bus_info_fops;
1275 entry->data = acpi_driver_data(device);
1276 entry->owner = THIS_MODULE;
1277 }
1278
1279 /* 'ROM' [R] */
1280 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1281 if (!entry)
1282 return -ENODEV;
1283 else {
1284 entry->proc_fops = &acpi_video_bus_ROM_fops;
1285 entry->data = acpi_driver_data(device);
1286 entry->owner = THIS_MODULE;
1287 }
1288
1289 /* 'POST_info' [R] */
1290 entry =
1291 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1292 if (!entry)
1293 return -ENODEV;
1294 else {
1295 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1296 entry->data = acpi_driver_data(device);
1297 entry->owner = THIS_MODULE;
1298 }
1299
1300 /* 'POST' [R/W] */
1301 entry =
1302 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1303 acpi_device_dir(device));
1304 if (!entry)
1305 return -ENODEV;
1306 else {
1307 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1308 entry->proc_fops = &acpi_video_bus_POST_fops;
1309 entry->data = acpi_driver_data(device);
1310 entry->owner = THIS_MODULE;
1311 }
1312
1313 /* 'DOS' [R/W] */
1314 entry =
1315 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1316 acpi_device_dir(device));
1317 if (!entry)
1318 return -ENODEV;
1319 else {
1320 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1321 entry->proc_fops = &acpi_video_bus_DOS_fops;
1322 entry->data = acpi_driver_data(device);
1323 entry->owner = THIS_MODULE;
1324 }
1325
1326 return 0;
1327 }
1328
1329 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1330 {
1331 struct acpi_video_bus *video;
1332
1333
1334 video = acpi_driver_data(device);
1335
1336 if (acpi_device_dir(device)) {
1337 remove_proc_entry("info", acpi_device_dir(device));
1338 remove_proc_entry("ROM", acpi_device_dir(device));
1339 remove_proc_entry("POST_info", acpi_device_dir(device));
1340 remove_proc_entry("POST", acpi_device_dir(device));
1341 remove_proc_entry("DOS", acpi_device_dir(device));
1342 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1343 acpi_device_dir(device) = NULL;
1344 }
1345
1346 return 0;
1347 }
1348
1349 /* --------------------------------------------------------------------------
1350 Driver Interface
1351 -------------------------------------------------------------------------- */
1352
1353 /* device interface */
1354 static struct acpi_video_device_attrib*
1355 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1356 {
1357 int count;
1358
1359 for(count = 0; count < video->attached_count; count++)
1360 if((video->attached_array[count].value.int_val & 0xffff) == device_id)
1361 return &(video->attached_array[count].value.attrib);
1362 return NULL;
1363 }
1364
1365 static int
1366 acpi_video_bus_get_one_device(struct acpi_device *device,
1367 struct acpi_video_bus *video)
1368 {
1369 unsigned long device_id;
1370 int status;
1371 struct acpi_video_device *data;
1372 struct acpi_video_device_attrib* attribute;
1373
1374 if (!device || !video)
1375 return -EINVAL;
1376
1377 status =
1378 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1379 if (ACPI_SUCCESS(status)) {
1380
1381 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1382 if (!data)
1383 return -ENOMEM;
1384
1385 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1386 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1387 acpi_driver_data(device) = data;
1388
1389 data->device_id = device_id;
1390 data->video = video;
1391 data->dev = device;
1392
1393 attribute = acpi_video_get_device_attr(video, device_id);
1394
1395 if((attribute != NULL) && attribute->device_id_scheme) {
1396 switch (attribute->display_type) {
1397 case ACPI_VIDEO_DISPLAY_CRT:
1398 data->flags.crt = 1;
1399 break;
1400 case ACPI_VIDEO_DISPLAY_TV:
1401 data->flags.tvout = 1;
1402 break;
1403 case ACPI_VIDEO_DISPLAY_DVI:
1404 data->flags.dvi = 1;
1405 break;
1406 case ACPI_VIDEO_DISPLAY_LCD:
1407 data->flags.lcd = 1;
1408 break;
1409 default:
1410 data->flags.unknown = 1;
1411 break;
1412 }
1413 if(attribute->bios_can_detect)
1414 data->flags.bios = 1;
1415 } else
1416 data->flags.unknown = 1;
1417
1418 acpi_video_device_bind(video, data);
1419 acpi_video_device_find_cap(data);
1420
1421 status = acpi_install_notify_handler(device->handle,
1422 ACPI_DEVICE_NOTIFY,
1423 acpi_video_device_notify,
1424 data);
1425 if (ACPI_FAILURE(status)) {
1426 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1427 "Error installing notify handler\n"));
1428 if(data->brightness)
1429 kfree(data->brightness->levels);
1430 kfree(data->brightness);
1431 kfree(data);
1432 return -ENODEV;
1433 }
1434
1435 down(&video->sem);
1436 list_add_tail(&data->entry, &video->video_device_list);
1437 up(&video->sem);
1438
1439 acpi_video_device_add_fs(device);
1440
1441 return 0;
1442 }
1443
1444 return -ENOENT;
1445 }
1446
1447 /*
1448 * Arg:
1449 * video : video bus device
1450 *
1451 * Return:
1452 * none
1453 *
1454 * Enumerate the video device list of the video bus,
1455 * bind the ids with the corresponding video devices
1456 * under the video bus.
1457 */
1458
1459 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1460 {
1461 struct list_head *node, *next;
1462 list_for_each_safe(node, next, &video->video_device_list) {
1463 struct acpi_video_device *dev =
1464 container_of(node, struct acpi_video_device, entry);
1465 acpi_video_device_bind(video, dev);
1466 }
1467 }
1468
1469 /*
1470 * Arg:
1471 * video : video bus device
1472 * device : video output device under the video
1473 * bus
1474 *
1475 * Return:
1476 * none
1477 *
1478 * Bind the ids with the corresponding video devices
1479 * under the video bus.
1480 */
1481
1482 static void
1483 acpi_video_device_bind(struct acpi_video_bus *video,
1484 struct acpi_video_device *device)
1485 {
1486 int i;
1487
1488 #define IDS_VAL(i) video->attached_array[i].value.int_val
1489 #define IDS_BIND(i) video->attached_array[i].bind_info
1490
1491 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1492 i < video->attached_count; i++) {
1493 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1494 IDS_BIND(i) = device;
1495 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1496 }
1497 }
1498 #undef IDS_VAL
1499 #undef IDS_BIND
1500 }
1501
1502 /*
1503 * Arg:
1504 * video : video bus device
1505 *
1506 * Return:
1507 * < 0 : error
1508 *
1509 * Call _DOD to enumerate all devices attached to display adapter
1510 *
1511 */
1512
1513 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1514 {
1515 int status;
1516 int count;
1517 int i;
1518 struct acpi_video_enumerated_device *active_device_list;
1519 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1520 union acpi_object *dod = NULL;
1521 union acpi_object *obj;
1522
1523 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1524 if (!ACPI_SUCCESS(status)) {
1525 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1526 return status;
1527 }
1528
1529 dod = buffer.pointer;
1530 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1531 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1532 status = -EFAULT;
1533 goto out;
1534 }
1535
1536 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1537 dod->package.count));
1538
1539 active_device_list = kmalloc((1 +
1540 dod->package.count) *
1541 sizeof(struct
1542 acpi_video_enumerated_device),
1543 GFP_KERNEL);
1544
1545 if (!active_device_list) {
1546 status = -ENOMEM;
1547 goto out;
1548 }
1549
1550 count = 0;
1551 for (i = 0; i < dod->package.count; i++) {
1552 obj = &dod->package.elements[i];
1553
1554 if (obj->type != ACPI_TYPE_INTEGER) {
1555 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1556 active_device_list[i].value.int_val =
1557 ACPI_VIDEO_HEAD_INVALID;
1558 }
1559 active_device_list[i].value.int_val = obj->integer.value;
1560 active_device_list[i].bind_info = NULL;
1561 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1562 (int)obj->integer.value));
1563 count++;
1564 }
1565 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1566
1567 kfree(video->attached_array);
1568
1569 video->attached_array = active_device_list;
1570 video->attached_count = count;
1571 out:
1572 kfree(buffer.pointer);
1573 return status;
1574 }
1575
1576 /*
1577 * Arg:
1578 * video : video bus device
1579 * event : notify event
1580 *
1581 * Return:
1582 * < 0 : error
1583 *
1584 * 1. Find out the current active output device.
1585 * 2. Identify the next output device to switch to.
1586 * 3. call _DSS to do actual switch.
1587 */
1588
1589 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1590 {
1591 struct list_head *node, *next;
1592 struct acpi_video_device *dev = NULL;
1593 struct acpi_video_device *dev_next = NULL;
1594 struct acpi_video_device *dev_prev = NULL;
1595 unsigned long state;
1596 int status = 0;
1597
1598
1599 list_for_each_safe(node, next, &video->video_device_list) {
1600 dev = container_of(node, struct acpi_video_device, entry);
1601 status = acpi_video_device_get_state(dev, &state);
1602 if (state & 0x2) {
1603 dev_next =
1604 container_of(node->next, struct acpi_video_device,
1605 entry);
1606 dev_prev =
1607 container_of(node->prev, struct acpi_video_device,
1608 entry);
1609 goto out;
1610 }
1611 }
1612 dev_next = container_of(node->next, struct acpi_video_device, entry);
1613 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1614 out:
1615 switch (event) {
1616 case ACPI_VIDEO_NOTIFY_CYCLE:
1617 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1618 acpi_video_device_set_state(dev, 0);
1619 acpi_video_device_set_state(dev_next, 0x80000001);
1620 break;
1621 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1622 acpi_video_device_set_state(dev, 0);
1623 acpi_video_device_set_state(dev_prev, 0x80000001);
1624 default:
1625 break;
1626 }
1627
1628 return status;
1629 }
1630
1631 static int
1632 acpi_video_get_next_level(struct acpi_video_device *device,
1633 u32 level_current, u32 event)
1634 {
1635 int min, max, min_above, max_below, i, l;
1636 max = max_below = 0;
1637 min = min_above = 255;
1638 for (i = 0; i < device->brightness->count; i++) {
1639 l = device->brightness->levels[i];
1640 if (l < min)
1641 min = l;
1642 if (l > max)
1643 max = l;
1644 if (l < min_above && l > level_current)
1645 min_above = l;
1646 if (l > max_below && l < level_current)
1647 max_below = l;
1648 }
1649
1650 switch (event) {
1651 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1652 return (level_current < max) ? min_above : min;
1653 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1654 return (level_current < max) ? min_above : max;
1655 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1656 return (level_current > min) ? max_below : min;
1657 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1658 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1659 return 0;
1660 default:
1661 return level_current;
1662 }
1663 }
1664
1665 static void
1666 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1667 {
1668 unsigned long level_current, level_next;
1669 acpi_video_device_lcd_get_level_current(device, &level_current);
1670 level_next = acpi_video_get_next_level(device, level_current, event);
1671 acpi_video_device_lcd_set_level(device, level_next);
1672 }
1673
1674 static int
1675 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1676 struct acpi_device *device)
1677 {
1678 int status = 0;
1679 struct list_head *node, *next;
1680
1681
1682 acpi_video_device_enumerate(video);
1683
1684 list_for_each_safe(node, next, &device->children) {
1685 struct acpi_device *dev =
1686 list_entry(node, struct acpi_device, node);
1687
1688 if (!dev)
1689 continue;
1690
1691 status = acpi_video_bus_get_one_device(dev, video);
1692 if (ACPI_FAILURE(status)) {
1693 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1694 continue;
1695 }
1696
1697 }
1698 return status;
1699 }
1700
1701 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1702 {
1703 acpi_status status;
1704 struct acpi_video_bus *video;
1705
1706
1707 if (!device || !device->video)
1708 return -ENOENT;
1709
1710 video = device->video;
1711
1712 down(&video->sem);
1713 list_del(&device->entry);
1714 up(&video->sem);
1715 acpi_video_device_remove_fs(device->dev);
1716
1717 status = acpi_remove_notify_handler(device->dev->handle,
1718 ACPI_DEVICE_NOTIFY,
1719 acpi_video_device_notify);
1720 backlight_device_unregister(device->backlight);
1721 video_output_unregister(device->output_dev);
1722 return 0;
1723 }
1724
1725 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1726 {
1727 int status;
1728 struct list_head *node, *next;
1729
1730
1731 list_for_each_safe(node, next, &video->video_device_list) {
1732 struct acpi_video_device *data =
1733 list_entry(node, struct acpi_video_device, entry);
1734 if (!data)
1735 continue;
1736
1737 status = acpi_video_bus_put_one_device(data);
1738 if (ACPI_FAILURE(status))
1739 printk(KERN_WARNING PREFIX
1740 "hhuuhhuu bug in acpi video driver.\n");
1741
1742 if (data->brightness)
1743 kfree(data->brightness->levels);
1744 kfree(data->brightness);
1745 kfree(data);
1746 }
1747
1748 return 0;
1749 }
1750
1751 /* acpi_video interface */
1752
1753 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1754 {
1755 return acpi_video_bus_DOS(video, 1, 0);
1756 }
1757
1758 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1759 {
1760 return acpi_video_bus_DOS(video, 0, 1);
1761 }
1762
1763 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1764 {
1765 struct acpi_video_bus *video = data;
1766 struct acpi_device *device = NULL;
1767
1768 printk("video bus notify\n");
1769
1770 if (!video)
1771 return;
1772
1773 device = video->device;
1774
1775 switch (event) {
1776 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1777 * most likely via hotkey. */
1778 acpi_bus_generate_event(device, event, 0);
1779 break;
1780
1781 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1782 * connector. */
1783 acpi_video_device_enumerate(video);
1784 acpi_video_device_rebind(video);
1785 acpi_video_switch_output(video, event);
1786 acpi_bus_generate_event(device, event, 0);
1787 break;
1788
1789 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1790 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1791 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1792 acpi_video_switch_output(video, event);
1793 acpi_bus_generate_event(device, event, 0);
1794 break;
1795
1796 default:
1797 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1798 "Unsupported event [0x%x]\n", event));
1799 break;
1800 }
1801
1802 return;
1803 }
1804
1805 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1806 {
1807 struct acpi_video_device *video_device = data;
1808 struct acpi_device *device = NULL;
1809
1810 if (!video_device)
1811 return;
1812
1813 device = video_device->dev;
1814
1815 switch (event) {
1816 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1817 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1818 acpi_bus_generate_event(device, event, 0);
1819 break;
1820 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1821 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1822 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1823 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1824 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1825 acpi_video_switch_brightness(video_device, event);
1826 acpi_bus_generate_event(device, event, 0);
1827 break;
1828 default:
1829 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1830 "Unsupported event [0x%x]\n", event));
1831 break;
1832 }
1833 return;
1834 }
1835
1836 static int acpi_video_bus_add(struct acpi_device *device)
1837 {
1838 int result = 0;
1839 acpi_status status = 0;
1840 struct acpi_video_bus *video = NULL;
1841
1842
1843 if (!device)
1844 return -EINVAL;
1845
1846 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1847 if (!video)
1848 return -ENOMEM;
1849
1850 video->device = device;
1851 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1852 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1853 acpi_driver_data(device) = video;
1854
1855 acpi_video_bus_find_cap(video);
1856 result = acpi_video_bus_check(video);
1857 if (result)
1858 goto end;
1859
1860 result = acpi_video_bus_add_fs(device);
1861 if (result)
1862 goto end;
1863
1864 init_MUTEX(&video->sem);
1865 INIT_LIST_HEAD(&video->video_device_list);
1866
1867 acpi_video_bus_get_devices(video, device);
1868 acpi_video_bus_start_devices(video);
1869
1870 status = acpi_install_notify_handler(device->handle,
1871 ACPI_DEVICE_NOTIFY,
1872 acpi_video_bus_notify, video);
1873 if (ACPI_FAILURE(status)) {
1874 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1875 "Error installing notify handler\n"));
1876 acpi_video_bus_stop_devices(video);
1877 acpi_video_bus_put_devices(video);
1878 kfree(video->attached_array);
1879 acpi_video_bus_remove_fs(device);
1880 result = -ENODEV;
1881 goto end;
1882 }
1883
1884 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1885 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1886 video->flags.multihead ? "yes" : "no",
1887 video->flags.rom ? "yes" : "no",
1888 video->flags.post ? "yes" : "no");
1889
1890 end:
1891 if (result)
1892 kfree(video);
1893
1894 return result;
1895 }
1896
1897 static int acpi_video_bus_remove(struct acpi_device *device, int type)
1898 {
1899 acpi_status status = 0;
1900 struct acpi_video_bus *video = NULL;
1901
1902
1903 if (!device || !acpi_driver_data(device))
1904 return -EINVAL;
1905
1906 video = acpi_driver_data(device);
1907
1908 acpi_video_bus_stop_devices(video);
1909
1910 status = acpi_remove_notify_handler(video->device->handle,
1911 ACPI_DEVICE_NOTIFY,
1912 acpi_video_bus_notify);
1913
1914 acpi_video_bus_put_devices(video);
1915 acpi_video_bus_remove_fs(device);
1916
1917 kfree(video->attached_array);
1918 kfree(video);
1919
1920 return 0;
1921 }
1922
1923 static int __init acpi_video_init(void)
1924 {
1925 int result = 0;
1926
1927
1928 /*
1929 acpi_dbg_level = 0xFFFFFFFF;
1930 acpi_dbg_layer = 0x08000000;
1931 */
1932
1933 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1934 if (!acpi_video_dir)
1935 return -ENODEV;
1936 acpi_video_dir->owner = THIS_MODULE;
1937
1938 result = acpi_bus_register_driver(&acpi_video_bus);
1939 if (result < 0) {
1940 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1941 return -ENODEV;
1942 }
1943
1944 return 0;
1945 }
1946
1947 static void __exit acpi_video_exit(void)
1948 {
1949
1950 acpi_bus_unregister_driver(&acpi_video_bus);
1951
1952 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1953
1954 return;
1955 }
1956
1957 module_init(acpi_video_init);
1958 module_exit(acpi_video_exit);
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