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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/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <asm/uaccess.h>
40
41 #include <acpi/acpi_bus.h>
42 #include <acpi/acpi_drivers.h>
43
44 #define ACPI_VIDEO_COMPONENT 0x08000000
45 #define ACPI_VIDEO_CLASS "video"
46 #define ACPI_VIDEO_BUS_NAME "Video Bus"
47 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
48 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
49 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
50 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
51 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
52 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
53
54 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
55 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
56 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
57 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
58 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
59
60 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
61 #define ACPI_VIDEO_HEAD_END (~0u)
62 #define MAX_NAME_LEN 20
63
64 #define ACPI_VIDEO_DISPLAY_CRT 1
65 #define ACPI_VIDEO_DISPLAY_TV 2
66 #define ACPI_VIDEO_DISPLAY_DVI 3
67 #define ACPI_VIDEO_DISPLAY_LCD 4
68
69 #define _COMPONENT ACPI_VIDEO_COMPONENT
70 ACPI_MODULE_NAME("video");
71
72 MODULE_AUTHOR("Bruno Ducrot");
73 MODULE_DESCRIPTION("ACPI Video Driver");
74 MODULE_LICENSE("GPL");
75
76 static int brightness_switch_enabled = 1;
77 module_param(brightness_switch_enabled, bool, 0644);
78
79 static int acpi_video_bus_add(struct acpi_device *device);
80 static int acpi_video_bus_remove(struct acpi_device *device, int type);
81 static int acpi_video_resume(struct acpi_device *device);
82
83 static const struct acpi_device_id video_device_ids[] = {
84 {ACPI_VIDEO_HID, 0},
85 {"", 0},
86 };
87 MODULE_DEVICE_TABLE(acpi, video_device_ids);
88
89 static struct acpi_driver acpi_video_bus = {
90 .name = "video",
91 .class = ACPI_VIDEO_CLASS,
92 .ids = video_device_ids,
93 .ops = {
94 .add = acpi_video_bus_add,
95 .remove = acpi_video_bus_remove,
96 .resume = acpi_video_resume,
97 },
98 };
99
100 struct acpi_video_bus_flags {
101 u8 multihead:1; /* can switch video heads */
102 u8 rom:1; /* can retrieve a video rom */
103 u8 post:1; /* can configure the head to */
104 u8 reserved:5;
105 };
106
107 struct acpi_video_bus_cap {
108 u8 _DOS:1; /*Enable/Disable output switching */
109 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
110 u8 _ROM:1; /*Get ROM Data */
111 u8 _GPD:1; /*Get POST Device */
112 u8 _SPD:1; /*Set POST Device */
113 u8 _VPO:1; /*Video POST Options */
114 u8 reserved:2;
115 };
116
117 struct acpi_video_device_attrib {
118 u32 display_index:4; /* A zero-based instance of the Display */
119 u32 display_port_attachment:4; /*This field differentiates the display type */
120 u32 display_type:4; /*Describe the specific type in use */
121 u32 vendor_specific:4; /*Chipset Vendor Specific */
122 u32 bios_can_detect:1; /*BIOS can detect the device */
123 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
124 the VGA device. */
125 u32 pipe_id:3; /*For VGA multiple-head devices. */
126 u32 reserved:10; /*Must be 0 */
127 u32 device_id_scheme:1; /*Device ID Scheme */
128 };
129
130 struct acpi_video_enumerated_device {
131 union {
132 u32 int_val;
133 struct acpi_video_device_attrib attrib;
134 } value;
135 struct acpi_video_device *bind_info;
136 };
137
138 struct acpi_video_bus {
139 struct acpi_device *device;
140 u8 dos_setting;
141 struct acpi_video_enumerated_device *attached_array;
142 u8 attached_count;
143 struct acpi_video_bus_cap cap;
144 struct acpi_video_bus_flags flags;
145 struct list_head video_device_list;
146 struct mutex device_list_lock; /* protects video_device_list */
147 struct proc_dir_entry *dir;
148 struct input_dev *input;
149 char phys[32]; /* for input device */
150 };
151
152 struct acpi_video_device_flags {
153 u8 crt:1;
154 u8 lcd:1;
155 u8 tvout:1;
156 u8 dvi:1;
157 u8 bios:1;
158 u8 unknown:1;
159 u8 reserved:2;
160 };
161
162 struct acpi_video_device_cap {
163 u8 _ADR:1; /*Return the unique ID */
164 u8 _BCL:1; /*Query list of brightness control levels supported */
165 u8 _BCM:1; /*Set the brightness level */
166 u8 _BQC:1; /* Get current brightness level */
167 u8 _DDC:1; /*Return the EDID for this device */
168 u8 _DCS:1; /*Return status of output device */
169 u8 _DGS:1; /*Query graphics state */
170 u8 _DSS:1; /*Device state set */
171 };
172
173 struct acpi_video_device_brightness {
174 int curr;
175 int count;
176 int *levels;
177 };
178
179 struct acpi_video_device {
180 unsigned long device_id;
181 struct acpi_video_device_flags flags;
182 struct acpi_video_device_cap cap;
183 struct list_head entry;
184 struct acpi_video_bus *video;
185 struct acpi_device *dev;
186 struct acpi_video_device_brightness *brightness;
187 struct backlight_device *backlight;
188 struct thermal_cooling_device *cdev;
189 struct output_device *output_dev;
190 };
191
192 /* bus */
193 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
194 static struct file_operations acpi_video_bus_info_fops = {
195 .open = acpi_video_bus_info_open_fs,
196 .read = seq_read,
197 .llseek = seq_lseek,
198 .release = single_release,
199 };
200
201 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
202 static struct file_operations acpi_video_bus_ROM_fops = {
203 .open = acpi_video_bus_ROM_open_fs,
204 .read = seq_read,
205 .llseek = seq_lseek,
206 .release = single_release,
207 };
208
209 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
210 struct file *file);
211 static struct file_operations acpi_video_bus_POST_info_fops = {
212 .open = acpi_video_bus_POST_info_open_fs,
213 .read = seq_read,
214 .llseek = seq_lseek,
215 .release = single_release,
216 };
217
218 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
219 static struct file_operations acpi_video_bus_POST_fops = {
220 .open = acpi_video_bus_POST_open_fs,
221 .read = seq_read,
222 .llseek = seq_lseek,
223 .release = single_release,
224 };
225
226 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
227 static struct file_operations acpi_video_bus_DOS_fops = {
228 .open = acpi_video_bus_DOS_open_fs,
229 .read = seq_read,
230 .llseek = seq_lseek,
231 .release = single_release,
232 };
233
234 /* device */
235 static int acpi_video_device_info_open_fs(struct inode *inode,
236 struct file *file);
237 static struct file_operations acpi_video_device_info_fops = {
238 .open = acpi_video_device_info_open_fs,
239 .read = seq_read,
240 .llseek = seq_lseek,
241 .release = single_release,
242 };
243
244 static int acpi_video_device_state_open_fs(struct inode *inode,
245 struct file *file);
246 static struct file_operations acpi_video_device_state_fops = {
247 .open = acpi_video_device_state_open_fs,
248 .read = seq_read,
249 .llseek = seq_lseek,
250 .release = single_release,
251 };
252
253 static int acpi_video_device_brightness_open_fs(struct inode *inode,
254 struct file *file);
255 static struct file_operations acpi_video_device_brightness_fops = {
256 .open = acpi_video_device_brightness_open_fs,
257 .read = seq_read,
258 .llseek = seq_lseek,
259 .release = single_release,
260 };
261
262 static int acpi_video_device_EDID_open_fs(struct inode *inode,
263 struct file *file);
264 static struct file_operations acpi_video_device_EDID_fops = {
265 .open = acpi_video_device_EDID_open_fs,
266 .read = seq_read,
267 .llseek = seq_lseek,
268 .release = single_release,
269 };
270
271 static char device_decode[][30] = {
272 "motherboard VGA device",
273 "PCI VGA device",
274 "AGP VGA device",
275 "UNKNOWN",
276 };
277
278 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
279 static void acpi_video_device_rebind(struct acpi_video_bus *video);
280 static void acpi_video_device_bind(struct acpi_video_bus *video,
281 struct acpi_video_device *device);
282 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
283 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
284 int level);
285 static int acpi_video_device_lcd_get_level_current(
286 struct acpi_video_device *device,
287 unsigned long *level);
288 static int acpi_video_get_next_level(struct acpi_video_device *device,
289 u32 level_current, u32 event);
290 static void acpi_video_switch_brightness(struct acpi_video_device *device,
291 int event);
292 static int acpi_video_device_get_state(struct acpi_video_device *device,
293 unsigned long *state);
294 static int acpi_video_output_get(struct output_device *od);
295 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
296
297 /*backlight device sysfs support*/
298 static int acpi_video_get_brightness(struct backlight_device *bd)
299 {
300 unsigned long cur_level;
301 int i;
302 struct acpi_video_device *vd =
303 (struct acpi_video_device *)bl_get_data(bd);
304 acpi_video_device_lcd_get_level_current(vd, &cur_level);
305 for (i = 2; i < vd->brightness->count; i++) {
306 if (vd->brightness->levels[i] == cur_level)
307 /* The first two entries are special - see page 575
308 of the ACPI spec 3.0 */
309 return i-2;
310 }
311 return 0;
312 }
313
314 static int acpi_video_set_brightness(struct backlight_device *bd)
315 {
316 int request_level = bd->props.brightness+2;
317 struct acpi_video_device *vd =
318 (struct acpi_video_device *)bl_get_data(bd);
319 acpi_video_device_lcd_set_level(vd,
320 vd->brightness->levels[request_level]);
321 return 0;
322 }
323
324 static struct backlight_ops acpi_backlight_ops = {
325 .get_brightness = acpi_video_get_brightness,
326 .update_status = acpi_video_set_brightness,
327 };
328
329 /*video output device sysfs support*/
330 static int acpi_video_output_get(struct output_device *od)
331 {
332 unsigned long state;
333 struct acpi_video_device *vd =
334 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
335 acpi_video_device_get_state(vd, &state);
336 return (int)state;
337 }
338
339 static int acpi_video_output_set(struct output_device *od)
340 {
341 unsigned long state = od->request_state;
342 struct acpi_video_device *vd=
343 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
344 return acpi_video_device_set_state(vd, state);
345 }
346
347 static struct output_properties acpi_output_properties = {
348 .set_state = acpi_video_output_set,
349 .get_status = acpi_video_output_get,
350 };
351
352
353 /* thermal cooling device callbacks */
354 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
355 {
356 struct acpi_device *device = cdev->devdata;
357 struct acpi_video_device *video = acpi_driver_data(device);
358
359 return sprintf(buf, "%d\n", video->brightness->count - 3);
360 }
361
362 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
363 {
364 struct acpi_device *device = cdev->devdata;
365 struct acpi_video_device *video = acpi_driver_data(device);
366 unsigned long level;
367 int state;
368
369 acpi_video_device_lcd_get_level_current(video, &level);
370 for (state = 2; state < video->brightness->count; state++)
371 if (level == video->brightness->levels[state])
372 return sprintf(buf, "%d\n",
373 video->brightness->count - state - 1);
374
375 return -EINVAL;
376 }
377
378 static int
379 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
380 {
381 struct acpi_device *device = cdev->devdata;
382 struct acpi_video_device *video = acpi_driver_data(device);
383 int level;
384
385 if ( state >= video->brightness->count - 2)
386 return -EINVAL;
387
388 state = video->brightness->count - state;
389 level = video->brightness->levels[state -1];
390 return acpi_video_device_lcd_set_level(video, level);
391 }
392
393 static struct thermal_cooling_device_ops video_cooling_ops = {
394 .get_max_state = video_get_max_state,
395 .get_cur_state = video_get_cur_state,
396 .set_cur_state = video_set_cur_state,
397 };
398
399 /* --------------------------------------------------------------------------
400 Video Management
401 -------------------------------------------------------------------------- */
402
403 /* device */
404
405 static int
406 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
407 {
408 int status;
409
410 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
411
412 return status;
413 }
414
415 static int
416 acpi_video_device_get_state(struct acpi_video_device *device,
417 unsigned long *state)
418 {
419 int status;
420
421 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
422
423 return status;
424 }
425
426 static int
427 acpi_video_device_set_state(struct acpi_video_device *device, int state)
428 {
429 int status;
430 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
431 struct acpi_object_list args = { 1, &arg0 };
432 unsigned long ret;
433
434
435 arg0.integer.value = state;
436 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
437
438 return status;
439 }
440
441 static int
442 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
443 union acpi_object **levels)
444 {
445 int status;
446 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
447 union acpi_object *obj;
448
449
450 *levels = NULL;
451
452 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
453 if (!ACPI_SUCCESS(status))
454 return status;
455 obj = (union acpi_object *)buffer.pointer;
456 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
457 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
458 status = -EFAULT;
459 goto err;
460 }
461
462 *levels = obj;
463
464 return 0;
465
466 err:
467 kfree(buffer.pointer);
468
469 return status;
470 }
471
472 static int
473 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
474 {
475 int status = AE_OK;
476 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
477 struct acpi_object_list args = { 1, &arg0 };
478
479
480 arg0.integer.value = level;
481
482 if (device->cap._BCM)
483 status = acpi_evaluate_object(device->dev->handle, "_BCM",
484 &args, NULL);
485 device->brightness->curr = level;
486 return status;
487 }
488
489 static int
490 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
491 unsigned long *level)
492 {
493 if (device->cap._BQC)
494 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
495 level);
496 *level = device->brightness->curr;
497 return AE_OK;
498 }
499
500 static int
501 acpi_video_device_EDID(struct acpi_video_device *device,
502 union acpi_object **edid, ssize_t length)
503 {
504 int status;
505 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
506 union acpi_object *obj;
507 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
508 struct acpi_object_list args = { 1, &arg0 };
509
510
511 *edid = NULL;
512
513 if (!device)
514 return -ENODEV;
515 if (length == 128)
516 arg0.integer.value = 1;
517 else if (length == 256)
518 arg0.integer.value = 2;
519 else
520 return -EINVAL;
521
522 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
523 if (ACPI_FAILURE(status))
524 return -ENODEV;
525
526 obj = buffer.pointer;
527
528 if (obj && obj->type == ACPI_TYPE_BUFFER)
529 *edid = obj;
530 else {
531 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
532 status = -EFAULT;
533 kfree(obj);
534 }
535
536 return status;
537 }
538
539 /* bus */
540
541 static int
542 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
543 {
544 int status;
545 unsigned long tmp;
546 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
547 struct acpi_object_list args = { 1, &arg0 };
548
549
550 arg0.integer.value = option;
551
552 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
553 if (ACPI_SUCCESS(status))
554 status = tmp ? (-EINVAL) : (AE_OK);
555
556 return status;
557 }
558
559 static int
560 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
561 {
562 int status;
563
564 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
565
566 return status;
567 }
568
569 static int
570 acpi_video_bus_POST_options(struct acpi_video_bus *video,
571 unsigned long *options)
572 {
573 int status;
574
575 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
576 *options &= 3;
577
578 return status;
579 }
580
581 /*
582 * Arg:
583 * video : video bus device pointer
584 * bios_flag :
585 * 0. The system BIOS should NOT automatically switch(toggle)
586 * the active display output.
587 * 1. The system BIOS should automatically switch (toggle) the
588 * active display output. No switch event.
589 * 2. The _DGS value should be locked.
590 * 3. The system BIOS should not automatically switch (toggle) the
591 * active display output, but instead generate the display switch
592 * event notify code.
593 * lcd_flag :
594 * 0. The system BIOS should automatically control the brightness level
595 * of the LCD when the power changes from AC to DC
596 * 1. The system BIOS should NOT automatically control the brightness
597 * level of the LCD when the power changes from AC to DC.
598 * Return Value:
599 * -1 wrong arg.
600 */
601
602 static int
603 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
604 {
605 acpi_integer status = 0;
606 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
607 struct acpi_object_list args = { 1, &arg0 };
608
609
610 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
611 status = -1;
612 goto Failed;
613 }
614 arg0.integer.value = (lcd_flag << 2) | bios_flag;
615 video->dos_setting = arg0.integer.value;
616 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
617
618 Failed:
619 return status;
620 }
621
622 /*
623 * Arg:
624 * device : video output device (LCD, CRT, ..)
625 *
626 * Return Value:
627 * None
628 *
629 * Find out all required AML methods defined under the output
630 * device.
631 */
632
633 static void acpi_video_device_find_cap(struct acpi_video_device *device)
634 {
635 acpi_handle h_dummy1;
636 int i;
637 u32 max_level = 0;
638 union acpi_object *obj = NULL;
639 struct acpi_video_device_brightness *br = NULL;
640
641
642 memset(&device->cap, 0, sizeof(device->cap));
643
644 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
645 device->cap._ADR = 1;
646 }
647 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
648 device->cap._BCL = 1;
649 }
650 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
651 device->cap._BCM = 1;
652 }
653 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
654 device->cap._BQC = 1;
655 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
656 device->cap._DDC = 1;
657 }
658 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
659 device->cap._DCS = 1;
660 }
661 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
662 device->cap._DGS = 1;
663 }
664 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
665 device->cap._DSS = 1;
666 }
667
668 if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
669
670 if (obj->package.count >= 2) {
671 int count = 0;
672 union acpi_object *o;
673
674 br = kzalloc(sizeof(*br), GFP_KERNEL);
675 if (!br) {
676 printk(KERN_ERR "can't allocate memory\n");
677 } else {
678 br->levels = kmalloc(obj->package.count *
679 sizeof *(br->levels), GFP_KERNEL);
680 if (!br->levels)
681 goto out;
682
683 for (i = 0; i < obj->package.count; i++) {
684 o = (union acpi_object *)&obj->package.
685 elements[i];
686 if (o->type != ACPI_TYPE_INTEGER) {
687 printk(KERN_ERR PREFIX "Invalid data\n");
688 continue;
689 }
690 br->levels[count] = (u32) o->integer.value;
691
692 if (br->levels[count] > max_level)
693 max_level = br->levels[count];
694 count++;
695 }
696 out:
697 if (count < 2) {
698 kfree(br->levels);
699 kfree(br);
700 } else {
701 br->count = count;
702 device->brightness = br;
703 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
704 "found %d brightness levels\n",
705 count));
706 }
707 }
708 }
709
710 } else {
711 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
712 }
713
714 kfree(obj);
715
716 if (device->cap._BCL && device->cap._BCM && max_level > 0) {
717 int result;
718 static int count = 0;
719 char *name;
720 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
721 if (!name)
722 return;
723
724 sprintf(name, "acpi_video%d", count++);
725 device->backlight = backlight_device_register(name,
726 NULL, device, &acpi_backlight_ops);
727 device->backlight->props.max_brightness = device->brightness->count-3;
728 device->backlight->props.brightness = acpi_video_get_brightness(device->backlight);
729 backlight_update_status(device->backlight);
730 kfree(name);
731
732 device->cdev = thermal_cooling_device_register("LCD",
733 device->dev, &video_cooling_ops);
734 if (IS_ERR(device->cdev))
735 return;
736
737 if (device->cdev) {
738 printk(KERN_INFO PREFIX
739 "%s is registered as cooling_device%d\n",
740 device->dev->dev.bus_id, device->cdev->id);
741 result = sysfs_create_link(&device->dev->dev.kobj,
742 &device->cdev->device.kobj,
743 "thermal_cooling");
744 if (result)
745 printk(KERN_ERR PREFIX "Create sysfs link\n");
746 result = sysfs_create_link(&device->cdev->device.kobj,
747 &device->dev->dev.kobj,
748 "device");
749 if (result)
750 printk(KERN_ERR PREFIX "Create sysfs link\n");
751 }
752 }
753 if (device->cap._DCS && device->cap._DSS){
754 static int count = 0;
755 char *name;
756 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
757 if (!name)
758 return;
759 sprintf(name, "acpi_video%d", count++);
760 device->output_dev = video_output_register(name,
761 NULL, device, &acpi_output_properties);
762 kfree(name);
763 }
764 return;
765 }
766
767 /*
768 * Arg:
769 * device : video output device (VGA)
770 *
771 * Return Value:
772 * None
773 *
774 * Find out all required AML methods defined under the video bus device.
775 */
776
777 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
778 {
779 acpi_handle h_dummy1;
780
781 memset(&video->cap, 0, sizeof(video->cap));
782 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
783 video->cap._DOS = 1;
784 }
785 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
786 video->cap._DOD = 1;
787 }
788 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
789 video->cap._ROM = 1;
790 }
791 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
792 video->cap._GPD = 1;
793 }
794 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
795 video->cap._SPD = 1;
796 }
797 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
798 video->cap._VPO = 1;
799 }
800 }
801
802 /*
803 * Check whether the video bus device has required AML method to
804 * support the desired features
805 */
806
807 static int acpi_video_bus_check(struct acpi_video_bus *video)
808 {
809 acpi_status status = -ENOENT;
810
811
812 if (!video)
813 return -EINVAL;
814
815 /* Since there is no HID, CID and so on for VGA driver, we have
816 * to check well known required nodes.
817 */
818
819 /* Does this device support video switching? */
820 if (video->cap._DOS) {
821 video->flags.multihead = 1;
822 status = 0;
823 }
824
825 /* Does this device support retrieving a video ROM? */
826 if (video->cap._ROM) {
827 video->flags.rom = 1;
828 status = 0;
829 }
830
831 /* Does this device support configuring which video device to POST? */
832 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
833 video->flags.post = 1;
834 status = 0;
835 }
836
837 return status;
838 }
839
840 /* --------------------------------------------------------------------------
841 FS Interface (/proc)
842 -------------------------------------------------------------------------- */
843
844 static struct proc_dir_entry *acpi_video_dir;
845
846 /* video devices */
847
848 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
849 {
850 struct acpi_video_device *dev = seq->private;
851
852
853 if (!dev)
854 goto end;
855
856 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
857 seq_printf(seq, "type: ");
858 if (dev->flags.crt)
859 seq_printf(seq, "CRT\n");
860 else if (dev->flags.lcd)
861 seq_printf(seq, "LCD\n");
862 else if (dev->flags.tvout)
863 seq_printf(seq, "TVOUT\n");
864 else if (dev->flags.dvi)
865 seq_printf(seq, "DVI\n");
866 else
867 seq_printf(seq, "UNKNOWN\n");
868
869 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
870
871 end:
872 return 0;
873 }
874
875 static int
876 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
877 {
878 return single_open(file, acpi_video_device_info_seq_show,
879 PDE(inode)->data);
880 }
881
882 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
883 {
884 int status;
885 struct acpi_video_device *dev = seq->private;
886 unsigned long state;
887
888
889 if (!dev)
890 goto end;
891
892 status = acpi_video_device_get_state(dev, &state);
893 seq_printf(seq, "state: ");
894 if (ACPI_SUCCESS(status))
895 seq_printf(seq, "0x%02lx\n", state);
896 else
897 seq_printf(seq, "<not supported>\n");
898
899 status = acpi_video_device_query(dev, &state);
900 seq_printf(seq, "query: ");
901 if (ACPI_SUCCESS(status))
902 seq_printf(seq, "0x%02lx\n", state);
903 else
904 seq_printf(seq, "<not supported>\n");
905
906 end:
907 return 0;
908 }
909
910 static int
911 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
912 {
913 return single_open(file, acpi_video_device_state_seq_show,
914 PDE(inode)->data);
915 }
916
917 static ssize_t
918 acpi_video_device_write_state(struct file *file,
919 const char __user * buffer,
920 size_t count, loff_t * data)
921 {
922 int status;
923 struct seq_file *m = file->private_data;
924 struct acpi_video_device *dev = m->private;
925 char str[12] = { 0 };
926 u32 state = 0;
927
928
929 if (!dev || count + 1 > sizeof str)
930 return -EINVAL;
931
932 if (copy_from_user(str, buffer, count))
933 return -EFAULT;
934
935 str[count] = 0;
936 state = simple_strtoul(str, NULL, 0);
937 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
938
939 status = acpi_video_device_set_state(dev, state);
940
941 if (status)
942 return -EFAULT;
943
944 return count;
945 }
946
947 static int
948 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
949 {
950 struct acpi_video_device *dev = seq->private;
951 int i;
952
953
954 if (!dev || !dev->brightness) {
955 seq_printf(seq, "<not supported>\n");
956 return 0;
957 }
958
959 seq_printf(seq, "levels: ");
960 for (i = 0; i < dev->brightness->count; i++)
961 seq_printf(seq, " %d", dev->brightness->levels[i]);
962 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
963
964 return 0;
965 }
966
967 static int
968 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
969 {
970 return single_open(file, acpi_video_device_brightness_seq_show,
971 PDE(inode)->data);
972 }
973
974 static ssize_t
975 acpi_video_device_write_brightness(struct file *file,
976 const char __user * buffer,
977 size_t count, loff_t * data)
978 {
979 struct seq_file *m = file->private_data;
980 struct acpi_video_device *dev = m->private;
981 char str[5] = { 0 };
982 unsigned int level = 0;
983 int i;
984
985
986 if (!dev || !dev->brightness || count + 1 > sizeof str)
987 return -EINVAL;
988
989 if (copy_from_user(str, buffer, count))
990 return -EFAULT;
991
992 str[count] = 0;
993 level = simple_strtoul(str, NULL, 0);
994
995 if (level > 100)
996 return -EFAULT;
997
998 /* validate through the list of available levels */
999 for (i = 0; i < dev->brightness->count; i++)
1000 if (level == dev->brightness->levels[i]) {
1001 if (ACPI_SUCCESS
1002 (acpi_video_device_lcd_set_level(dev, level)))
1003 dev->brightness->curr = level;
1004 break;
1005 }
1006
1007 return count;
1008 }
1009
1010 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1011 {
1012 struct acpi_video_device *dev = seq->private;
1013 int status;
1014 int i;
1015 union acpi_object *edid = NULL;
1016
1017
1018 if (!dev)
1019 goto out;
1020
1021 status = acpi_video_device_EDID(dev, &edid, 128);
1022 if (ACPI_FAILURE(status)) {
1023 status = acpi_video_device_EDID(dev, &edid, 256);
1024 }
1025
1026 if (ACPI_FAILURE(status)) {
1027 goto out;
1028 }
1029
1030 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1031 for (i = 0; i < edid->buffer.length; i++)
1032 seq_putc(seq, edid->buffer.pointer[i]);
1033 }
1034
1035 out:
1036 if (!edid)
1037 seq_printf(seq, "<not supported>\n");
1038 else
1039 kfree(edid);
1040
1041 return 0;
1042 }
1043
1044 static int
1045 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1046 {
1047 return single_open(file, acpi_video_device_EDID_seq_show,
1048 PDE(inode)->data);
1049 }
1050
1051 static int acpi_video_device_add_fs(struct acpi_device *device)
1052 {
1053 struct proc_dir_entry *entry = NULL;
1054 struct acpi_video_device *vid_dev;
1055
1056
1057 if (!device)
1058 return -ENODEV;
1059
1060 vid_dev = acpi_driver_data(device);
1061 if (!vid_dev)
1062 return -ENODEV;
1063
1064 if (!acpi_device_dir(device)) {
1065 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1066 vid_dev->video->dir);
1067 if (!acpi_device_dir(device))
1068 return -ENODEV;
1069 acpi_device_dir(device)->owner = THIS_MODULE;
1070 }
1071
1072 /* 'info' [R] */
1073 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1074 if (!entry)
1075 return -ENODEV;
1076 else {
1077 entry->proc_fops = &acpi_video_device_info_fops;
1078 entry->data = acpi_driver_data(device);
1079 entry->owner = THIS_MODULE;
1080 }
1081
1082 /* 'state' [R/W] */
1083 entry =
1084 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
1085 acpi_device_dir(device));
1086 if (!entry)
1087 return -ENODEV;
1088 else {
1089 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1090 entry->proc_fops = &acpi_video_device_state_fops;
1091 entry->data = acpi_driver_data(device);
1092 entry->owner = THIS_MODULE;
1093 }
1094
1095 /* 'brightness' [R/W] */
1096 entry =
1097 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1098 acpi_device_dir(device));
1099 if (!entry)
1100 return -ENODEV;
1101 else {
1102 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
1103 entry->proc_fops = &acpi_video_device_brightness_fops;
1104 entry->data = acpi_driver_data(device);
1105 entry->owner = THIS_MODULE;
1106 }
1107
1108 /* 'EDID' [R] */
1109 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
1110 if (!entry)
1111 return -ENODEV;
1112 else {
1113 entry->proc_fops = &acpi_video_device_EDID_fops;
1114 entry->data = acpi_driver_data(device);
1115 entry->owner = THIS_MODULE;
1116 }
1117
1118 return 0;
1119 }
1120
1121 static int acpi_video_device_remove_fs(struct acpi_device *device)
1122 {
1123 struct acpi_video_device *vid_dev;
1124
1125 vid_dev = acpi_driver_data(device);
1126 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1127 return -ENODEV;
1128
1129 if (acpi_device_dir(device)) {
1130 remove_proc_entry("info", acpi_device_dir(device));
1131 remove_proc_entry("state", acpi_device_dir(device));
1132 remove_proc_entry("brightness", acpi_device_dir(device));
1133 remove_proc_entry("EDID", acpi_device_dir(device));
1134 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1135 acpi_device_dir(device) = NULL;
1136 }
1137
1138 return 0;
1139 }
1140
1141 /* video bus */
1142 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1143 {
1144 struct acpi_video_bus *video = seq->private;
1145
1146
1147 if (!video)
1148 goto end;
1149
1150 seq_printf(seq, "Switching heads: %s\n",
1151 video->flags.multihead ? "yes" : "no");
1152 seq_printf(seq, "Video ROM: %s\n",
1153 video->flags.rom ? "yes" : "no");
1154 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1155 video->flags.post ? "yes" : "no");
1156
1157 end:
1158 return 0;
1159 }
1160
1161 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1162 {
1163 return single_open(file, acpi_video_bus_info_seq_show,
1164 PDE(inode)->data);
1165 }
1166
1167 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1168 {
1169 struct acpi_video_bus *video = seq->private;
1170
1171
1172 if (!video)
1173 goto end;
1174
1175 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1176 seq_printf(seq, "<TODO>\n");
1177
1178 end:
1179 return 0;
1180 }
1181
1182 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1183 {
1184 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1185 }
1186
1187 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1188 {
1189 struct acpi_video_bus *video = seq->private;
1190 unsigned long options;
1191 int status;
1192
1193
1194 if (!video)
1195 goto end;
1196
1197 status = acpi_video_bus_POST_options(video, &options);
1198 if (ACPI_SUCCESS(status)) {
1199 if (!(options & 1)) {
1200 printk(KERN_WARNING PREFIX
1201 "The motherboard VGA device is not listed as a possible POST device.\n");
1202 printk(KERN_WARNING PREFIX
1203 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1204 }
1205 printk("%lx\n", options);
1206 seq_printf(seq, "can POST: <integrated video>");
1207 if (options & 2)
1208 seq_printf(seq, " <PCI video>");
1209 if (options & 4)
1210 seq_printf(seq, " <AGP video>");
1211 seq_putc(seq, '\n');
1212 } else
1213 seq_printf(seq, "<not supported>\n");
1214 end:
1215 return 0;
1216 }
1217
1218 static int
1219 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1220 {
1221 return single_open(file, acpi_video_bus_POST_info_seq_show,
1222 PDE(inode)->data);
1223 }
1224
1225 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1226 {
1227 struct acpi_video_bus *video = seq->private;
1228 int status;
1229 unsigned long id;
1230
1231
1232 if (!video)
1233 goto end;
1234
1235 status = acpi_video_bus_get_POST(video, &id);
1236 if (!ACPI_SUCCESS(status)) {
1237 seq_printf(seq, "<not supported>\n");
1238 goto end;
1239 }
1240 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1241
1242 end:
1243 return 0;
1244 }
1245
1246 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1247 {
1248 struct acpi_video_bus *video = seq->private;
1249
1250
1251 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1252
1253 return 0;
1254 }
1255
1256 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1257 {
1258 return single_open(file, acpi_video_bus_POST_seq_show,
1259 PDE(inode)->data);
1260 }
1261
1262 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1263 {
1264 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1265 }
1266
1267 static ssize_t
1268 acpi_video_bus_write_POST(struct file *file,
1269 const char __user * buffer,
1270 size_t count, loff_t * data)
1271 {
1272 int status;
1273 struct seq_file *m = file->private_data;
1274 struct acpi_video_bus *video = m->private;
1275 char str[12] = { 0 };
1276 unsigned long opt, options;
1277
1278
1279 if (!video || count + 1 > sizeof str)
1280 return -EINVAL;
1281
1282 status = acpi_video_bus_POST_options(video, &options);
1283 if (!ACPI_SUCCESS(status))
1284 return -EINVAL;
1285
1286 if (copy_from_user(str, buffer, count))
1287 return -EFAULT;
1288
1289 str[count] = 0;
1290 opt = strtoul(str, NULL, 0);
1291 if (opt > 3)
1292 return -EFAULT;
1293
1294 /* just in case an OEM 'forgot' the motherboard... */
1295 options |= 1;
1296
1297 if (options & (1ul << opt)) {
1298 status = acpi_video_bus_set_POST(video, opt);
1299 if (!ACPI_SUCCESS(status))
1300 return -EFAULT;
1301
1302 }
1303
1304 return count;
1305 }
1306
1307 static ssize_t
1308 acpi_video_bus_write_DOS(struct file *file,
1309 const char __user * buffer,
1310 size_t count, loff_t * data)
1311 {
1312 int status;
1313 struct seq_file *m = file->private_data;
1314 struct acpi_video_bus *video = m->private;
1315 char str[12] = { 0 };
1316 unsigned long opt;
1317
1318
1319 if (!video || count + 1 > sizeof str)
1320 return -EINVAL;
1321
1322 if (copy_from_user(str, buffer, count))
1323 return -EFAULT;
1324
1325 str[count] = 0;
1326 opt = strtoul(str, NULL, 0);
1327 if (opt > 7)
1328 return -EFAULT;
1329
1330 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1331
1332 if (!ACPI_SUCCESS(status))
1333 return -EFAULT;
1334
1335 return count;
1336 }
1337
1338 static int acpi_video_bus_add_fs(struct acpi_device *device)
1339 {
1340 struct proc_dir_entry *entry = NULL;
1341 struct acpi_video_bus *video;
1342
1343
1344 video = acpi_driver_data(device);
1345
1346 if (!acpi_device_dir(device)) {
1347 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1348 acpi_video_dir);
1349 if (!acpi_device_dir(device))
1350 return -ENODEV;
1351 video->dir = acpi_device_dir(device);
1352 acpi_device_dir(device)->owner = THIS_MODULE;
1353 }
1354
1355 /* 'info' [R] */
1356 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1357 if (!entry)
1358 return -ENODEV;
1359 else {
1360 entry->proc_fops = &acpi_video_bus_info_fops;
1361 entry->data = acpi_driver_data(device);
1362 entry->owner = THIS_MODULE;
1363 }
1364
1365 /* 'ROM' [R] */
1366 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1367 if (!entry)
1368 return -ENODEV;
1369 else {
1370 entry->proc_fops = &acpi_video_bus_ROM_fops;
1371 entry->data = acpi_driver_data(device);
1372 entry->owner = THIS_MODULE;
1373 }
1374
1375 /* 'POST_info' [R] */
1376 entry =
1377 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1378 if (!entry)
1379 return -ENODEV;
1380 else {
1381 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1382 entry->data = acpi_driver_data(device);
1383 entry->owner = THIS_MODULE;
1384 }
1385
1386 /* 'POST' [R/W] */
1387 entry =
1388 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1389 acpi_device_dir(device));
1390 if (!entry)
1391 return -ENODEV;
1392 else {
1393 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1394 entry->proc_fops = &acpi_video_bus_POST_fops;
1395 entry->data = acpi_driver_data(device);
1396 entry->owner = THIS_MODULE;
1397 }
1398
1399 /* 'DOS' [R/W] */
1400 entry =
1401 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1402 acpi_device_dir(device));
1403 if (!entry)
1404 return -ENODEV;
1405 else {
1406 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1407 entry->proc_fops = &acpi_video_bus_DOS_fops;
1408 entry->data = acpi_driver_data(device);
1409 entry->owner = THIS_MODULE;
1410 }
1411
1412 return 0;
1413 }
1414
1415 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1416 {
1417 struct acpi_video_bus *video;
1418
1419
1420 video = acpi_driver_data(device);
1421
1422 if (acpi_device_dir(device)) {
1423 remove_proc_entry("info", acpi_device_dir(device));
1424 remove_proc_entry("ROM", acpi_device_dir(device));
1425 remove_proc_entry("POST_info", acpi_device_dir(device));
1426 remove_proc_entry("POST", acpi_device_dir(device));
1427 remove_proc_entry("DOS", acpi_device_dir(device));
1428 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1429 acpi_device_dir(device) = NULL;
1430 }
1431
1432 return 0;
1433 }
1434
1435 /* --------------------------------------------------------------------------
1436 Driver Interface
1437 -------------------------------------------------------------------------- */
1438
1439 /* device interface */
1440 static struct acpi_video_device_attrib*
1441 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1442 {
1443 int count;
1444
1445 for(count = 0; count < video->attached_count; count++)
1446 if((video->attached_array[count].value.int_val & 0xffff) == device_id)
1447 return &(video->attached_array[count].value.attrib);
1448 return NULL;
1449 }
1450
1451 static int
1452 acpi_video_bus_get_one_device(struct acpi_device *device,
1453 struct acpi_video_bus *video)
1454 {
1455 unsigned long device_id;
1456 int status;
1457 struct acpi_video_device *data;
1458 struct acpi_video_device_attrib* attribute;
1459
1460 if (!device || !video)
1461 return -EINVAL;
1462
1463 status =
1464 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1465 if (ACPI_SUCCESS(status)) {
1466
1467 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1468 if (!data)
1469 return -ENOMEM;
1470
1471 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1472 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1473 acpi_driver_data(device) = data;
1474
1475 data->device_id = device_id;
1476 data->video = video;
1477 data->dev = device;
1478
1479 attribute = acpi_video_get_device_attr(video, device_id);
1480
1481 if((attribute != NULL) && attribute->device_id_scheme) {
1482 switch (attribute->display_type) {
1483 case ACPI_VIDEO_DISPLAY_CRT:
1484 data->flags.crt = 1;
1485 break;
1486 case ACPI_VIDEO_DISPLAY_TV:
1487 data->flags.tvout = 1;
1488 break;
1489 case ACPI_VIDEO_DISPLAY_DVI:
1490 data->flags.dvi = 1;
1491 break;
1492 case ACPI_VIDEO_DISPLAY_LCD:
1493 data->flags.lcd = 1;
1494 break;
1495 default:
1496 data->flags.unknown = 1;
1497 break;
1498 }
1499 if(attribute->bios_can_detect)
1500 data->flags.bios = 1;
1501 } else
1502 data->flags.unknown = 1;
1503
1504 acpi_video_device_bind(video, data);
1505 acpi_video_device_find_cap(data);
1506
1507 status = acpi_install_notify_handler(device->handle,
1508 ACPI_DEVICE_NOTIFY,
1509 acpi_video_device_notify,
1510 data);
1511 if (ACPI_FAILURE(status)) {
1512 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1513 "Error installing notify handler\n"));
1514 if(data->brightness)
1515 kfree(data->brightness->levels);
1516 kfree(data->brightness);
1517 kfree(data);
1518 return -ENODEV;
1519 }
1520
1521 mutex_lock(&video->device_list_lock);
1522 list_add_tail(&data->entry, &video->video_device_list);
1523 mutex_unlock(&video->device_list_lock);
1524
1525 acpi_video_device_add_fs(device);
1526
1527 return 0;
1528 }
1529
1530 return -ENOENT;
1531 }
1532
1533 /*
1534 * Arg:
1535 * video : video bus device
1536 *
1537 * Return:
1538 * none
1539 *
1540 * Enumerate the video device list of the video bus,
1541 * bind the ids with the corresponding video devices
1542 * under the video bus.
1543 */
1544
1545 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1546 {
1547 struct acpi_video_device *dev;
1548
1549 mutex_lock(&video->device_list_lock);
1550
1551 list_for_each_entry(dev, &video->video_device_list, entry)
1552 acpi_video_device_bind(video, dev);
1553
1554 mutex_unlock(&video->device_list_lock);
1555 }
1556
1557 /*
1558 * Arg:
1559 * video : video bus device
1560 * device : video output device under the video
1561 * bus
1562 *
1563 * Return:
1564 * none
1565 *
1566 * Bind the ids with the corresponding video devices
1567 * under the video bus.
1568 */
1569
1570 static void
1571 acpi_video_device_bind(struct acpi_video_bus *video,
1572 struct acpi_video_device *device)
1573 {
1574 int i;
1575
1576 #define IDS_VAL(i) video->attached_array[i].value.int_val
1577 #define IDS_BIND(i) video->attached_array[i].bind_info
1578
1579 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1580 i < video->attached_count; i++) {
1581 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1582 IDS_BIND(i) = device;
1583 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1584 }
1585 }
1586 #undef IDS_VAL
1587 #undef IDS_BIND
1588 }
1589
1590 /*
1591 * Arg:
1592 * video : video bus device
1593 *
1594 * Return:
1595 * < 0 : error
1596 *
1597 * Call _DOD to enumerate all devices attached to display adapter
1598 *
1599 */
1600
1601 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1602 {
1603 int status;
1604 int count;
1605 int i;
1606 struct acpi_video_enumerated_device *active_device_list;
1607 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1608 union acpi_object *dod = NULL;
1609 union acpi_object *obj;
1610
1611 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1612 if (!ACPI_SUCCESS(status)) {
1613 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1614 return status;
1615 }
1616
1617 dod = buffer.pointer;
1618 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1619 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1620 status = -EFAULT;
1621 goto out;
1622 }
1623
1624 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1625 dod->package.count));
1626
1627 active_device_list = kmalloc((1 +
1628 dod->package.count) *
1629 sizeof(struct
1630 acpi_video_enumerated_device),
1631 GFP_KERNEL);
1632
1633 if (!active_device_list) {
1634 status = -ENOMEM;
1635 goto out;
1636 }
1637
1638 count = 0;
1639 for (i = 0; i < dod->package.count; i++) {
1640 obj = &dod->package.elements[i];
1641
1642 if (obj->type != ACPI_TYPE_INTEGER) {
1643 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1644 active_device_list[i].value.int_val =
1645 ACPI_VIDEO_HEAD_INVALID;
1646 }
1647 active_device_list[i].value.int_val = obj->integer.value;
1648 active_device_list[i].bind_info = NULL;
1649 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1650 (int)obj->integer.value));
1651 count++;
1652 }
1653 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1654
1655 kfree(video->attached_array);
1656
1657 video->attached_array = active_device_list;
1658 video->attached_count = count;
1659 out:
1660 kfree(buffer.pointer);
1661 return status;
1662 }
1663
1664 static int
1665 acpi_video_get_next_level(struct acpi_video_device *device,
1666 u32 level_current, u32 event)
1667 {
1668 int min, max, min_above, max_below, i, l, delta = 255;
1669 max = max_below = 0;
1670 min = min_above = 255;
1671 /* Find closest level to level_current */
1672 for (i = 0; i < device->brightness->count; i++) {
1673 l = device->brightness->levels[i];
1674 if (abs(l - level_current) < abs(delta)) {
1675 delta = l - level_current;
1676 if (!delta)
1677 break;
1678 }
1679 }
1680 /* Ajust level_current to closest available level */
1681 level_current += delta;
1682 for (i = 0; i < device->brightness->count; i++) {
1683 l = device->brightness->levels[i];
1684 if (l < min)
1685 min = l;
1686 if (l > max)
1687 max = l;
1688 if (l < min_above && l > level_current)
1689 min_above = l;
1690 if (l > max_below && l < level_current)
1691 max_below = l;
1692 }
1693
1694 switch (event) {
1695 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1696 return (level_current < max) ? min_above : min;
1697 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1698 return (level_current < max) ? min_above : max;
1699 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1700 return (level_current > min) ? max_below : min;
1701 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1702 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1703 return 0;
1704 default:
1705 return level_current;
1706 }
1707 }
1708
1709 static void
1710 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1711 {
1712 unsigned long level_current, level_next;
1713 acpi_video_device_lcd_get_level_current(device, &level_current);
1714 level_next = acpi_video_get_next_level(device, level_current, event);
1715 acpi_video_device_lcd_set_level(device, level_next);
1716 }
1717
1718 static int
1719 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1720 struct acpi_device *device)
1721 {
1722 int status = 0;
1723 struct acpi_device *dev;
1724
1725 acpi_video_device_enumerate(video);
1726
1727 list_for_each_entry(dev, &device->children, node) {
1728
1729 status = acpi_video_bus_get_one_device(dev, video);
1730 if (ACPI_FAILURE(status)) {
1731 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1732 continue;
1733 }
1734 }
1735 return status;
1736 }
1737
1738 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1739 {
1740 acpi_status status;
1741 struct acpi_video_bus *video;
1742
1743
1744 if (!device || !device->video)
1745 return -ENOENT;
1746
1747 video = device->video;
1748
1749 acpi_video_device_remove_fs(device->dev);
1750
1751 status = acpi_remove_notify_handler(device->dev->handle,
1752 ACPI_DEVICE_NOTIFY,
1753 acpi_video_device_notify);
1754 backlight_device_unregister(device->backlight);
1755 if (device->cdev) {
1756 sysfs_remove_link(&device->dev->dev.kobj,
1757 "thermal_cooling");
1758 sysfs_remove_link(&device->cdev->device.kobj,
1759 "device");
1760 thermal_cooling_device_unregister(device->cdev);
1761 device->cdev = NULL;
1762 }
1763 video_output_unregister(device->output_dev);
1764
1765 return 0;
1766 }
1767
1768 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1769 {
1770 int status;
1771 struct acpi_video_device *dev, *next;
1772
1773 mutex_lock(&video->device_list_lock);
1774
1775 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1776
1777 status = acpi_video_bus_put_one_device(dev);
1778 if (ACPI_FAILURE(status))
1779 printk(KERN_WARNING PREFIX
1780 "hhuuhhuu bug in acpi video driver.\n");
1781
1782 if (dev->brightness) {
1783 kfree(dev->brightness->levels);
1784 kfree(dev->brightness);
1785 }
1786 list_del(&dev->entry);
1787 kfree(dev);
1788 }
1789
1790 mutex_unlock(&video->device_list_lock);
1791
1792 return 0;
1793 }
1794
1795 /* acpi_video interface */
1796
1797 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1798 {
1799 return acpi_video_bus_DOS(video, 0, 0);
1800 }
1801
1802 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1803 {
1804 return acpi_video_bus_DOS(video, 0, 1);
1805 }
1806
1807 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1808 {
1809 struct acpi_video_bus *video = data;
1810 struct acpi_device *device = NULL;
1811 struct input_dev *input;
1812 int keycode;
1813
1814 if (!video)
1815 return;
1816
1817 device = video->device;
1818 input = video->input;
1819
1820 switch (event) {
1821 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1822 * most likely via hotkey. */
1823 acpi_bus_generate_proc_event(device, event, 0);
1824 keycode = KEY_SWITCHVIDEOMODE;
1825 break;
1826
1827 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1828 * connector. */
1829 acpi_video_device_enumerate(video);
1830 acpi_video_device_rebind(video);
1831 acpi_bus_generate_proc_event(device, event, 0);
1832 keycode = KEY_SWITCHVIDEOMODE;
1833 break;
1834
1835 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1836 acpi_bus_generate_proc_event(device, event, 0);
1837 keycode = KEY_SWITCHVIDEOMODE;
1838 break;
1839 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1840 acpi_bus_generate_proc_event(device, event, 0);
1841 keycode = KEY_VIDEO_NEXT;
1842 break;
1843 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1844 acpi_bus_generate_proc_event(device, event, 0);
1845 keycode = KEY_VIDEO_PREV;
1846 break;
1847
1848 default:
1849 keycode = KEY_UNKNOWN;
1850 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1851 "Unsupported event [0x%x]\n", event));
1852 break;
1853 }
1854
1855 acpi_notifier_call_chain(device, event, 0);
1856 input_report_key(input, keycode, 1);
1857 input_sync(input);
1858 input_report_key(input, keycode, 0);
1859 input_sync(input);
1860
1861 return;
1862 }
1863
1864 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1865 {
1866 struct acpi_video_device *video_device = data;
1867 struct acpi_device *device = NULL;
1868 struct acpi_video_bus *bus;
1869 struct input_dev *input;
1870 int keycode;
1871
1872 if (!video_device)
1873 return;
1874
1875 device = video_device->dev;
1876 bus = video_device->video;
1877 input = bus->input;
1878
1879 switch (event) {
1880 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1881 if (brightness_switch_enabled)
1882 acpi_video_switch_brightness(video_device, event);
1883 acpi_bus_generate_proc_event(device, event, 0);
1884 keycode = KEY_BRIGHTNESS_CYCLE;
1885 break;
1886 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1887 if (brightness_switch_enabled)
1888 acpi_video_switch_brightness(video_device, event);
1889 acpi_bus_generate_proc_event(device, event, 0);
1890 keycode = KEY_BRIGHTNESSUP;
1891 break;
1892 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1893 if (brightness_switch_enabled)
1894 acpi_video_switch_brightness(video_device, event);
1895 acpi_bus_generate_proc_event(device, event, 0);
1896 keycode = KEY_BRIGHTNESSDOWN;
1897 break;
1898 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1899 if (brightness_switch_enabled)
1900 acpi_video_switch_brightness(video_device, event);
1901 acpi_bus_generate_proc_event(device, event, 0);
1902 keycode = KEY_BRIGHTNESS_ZERO;
1903 break;
1904 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1905 if (brightness_switch_enabled)
1906 acpi_video_switch_brightness(video_device, event);
1907 acpi_bus_generate_proc_event(device, event, 0);
1908 keycode = KEY_DISPLAY_OFF;
1909 break;
1910 default:
1911 keycode = KEY_UNKNOWN;
1912 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1913 "Unsupported event [0x%x]\n", event));
1914 break;
1915 }
1916
1917 acpi_notifier_call_chain(device, event, 0);
1918 input_report_key(input, keycode, 1);
1919 input_sync(input);
1920 input_report_key(input, keycode, 0);
1921 input_sync(input);
1922
1923 return;
1924 }
1925
1926 static int instance;
1927 static int acpi_video_resume(struct acpi_device *device)
1928 {
1929 struct acpi_video_bus *video;
1930 struct acpi_video_device *video_device;
1931 int i;
1932
1933 if (!device || !acpi_driver_data(device))
1934 return -EINVAL;
1935
1936 video = acpi_driver_data(device);
1937
1938 for (i = 0; i < video->attached_count; i++) {
1939 video_device = video->attached_array[i].bind_info;
1940 if (video_device && video_device->backlight)
1941 acpi_video_set_brightness(video_device->backlight);
1942 }
1943 return AE_OK;
1944 }
1945
1946 static int acpi_video_bus_add(struct acpi_device *device)
1947 {
1948 acpi_status status;
1949 struct acpi_video_bus *video;
1950 struct input_dev *input;
1951 int error;
1952
1953 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1954 if (!video)
1955 return -ENOMEM;
1956
1957 /* a hack to fix the duplicate name "VID" problem on T61 */
1958 if (!strcmp(device->pnp.bus_id, "VID")) {
1959 if (instance)
1960 device->pnp.bus_id[3] = '0' + instance;
1961 instance ++;
1962 }
1963
1964 video->device = device;
1965 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1966 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1967 acpi_driver_data(device) = video;
1968
1969 acpi_video_bus_find_cap(video);
1970 error = acpi_video_bus_check(video);
1971 if (error)
1972 goto err_free_video;
1973
1974 error = acpi_video_bus_add_fs(device);
1975 if (error)
1976 goto err_free_video;
1977
1978 mutex_init(&video->device_list_lock);
1979 INIT_LIST_HEAD(&video->video_device_list);
1980
1981 acpi_video_bus_get_devices(video, device);
1982 acpi_video_bus_start_devices(video);
1983
1984 status = acpi_install_notify_handler(device->handle,
1985 ACPI_DEVICE_NOTIFY,
1986 acpi_video_bus_notify, video);
1987 if (ACPI_FAILURE(status)) {
1988 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1989 "Error installing notify handler\n"));
1990 error = -ENODEV;
1991 goto err_stop_video;
1992 }
1993
1994 video->input = input = input_allocate_device();
1995 if (!input) {
1996 error = -ENOMEM;
1997 goto err_uninstall_notify;
1998 }
1999
2000 snprintf(video->phys, sizeof(video->phys),
2001 "%s/video/input0", acpi_device_hid(video->device));
2002
2003 input->name = acpi_device_name(video->device);
2004 input->phys = video->phys;
2005 input->id.bustype = BUS_HOST;
2006 input->id.product = 0x06;
2007 input->dev.parent = &device->dev;
2008 input->evbit[0] = BIT(EV_KEY);
2009 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2010 set_bit(KEY_VIDEO_NEXT, input->keybit);
2011 set_bit(KEY_VIDEO_PREV, input->keybit);
2012 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2013 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2014 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2015 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2016 set_bit(KEY_DISPLAY_OFF, input->keybit);
2017 set_bit(KEY_UNKNOWN, input->keybit);
2018
2019 error = input_register_device(input);
2020 if (error)
2021 goto err_free_input_dev;
2022
2023 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2024 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2025 video->flags.multihead ? "yes" : "no",
2026 video->flags.rom ? "yes" : "no",
2027 video->flags.post ? "yes" : "no");
2028
2029 return 0;
2030
2031 err_free_input_dev:
2032 input_free_device(input);
2033 err_uninstall_notify:
2034 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2035 acpi_video_bus_notify);
2036 err_stop_video:
2037 acpi_video_bus_stop_devices(video);
2038 acpi_video_bus_put_devices(video);
2039 kfree(video->attached_array);
2040 acpi_video_bus_remove_fs(device);
2041 err_free_video:
2042 kfree(video);
2043 acpi_driver_data(device) = NULL;
2044
2045 return error;
2046 }
2047
2048 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2049 {
2050 acpi_status status = 0;
2051 struct acpi_video_bus *video = NULL;
2052
2053
2054 if (!device || !acpi_driver_data(device))
2055 return -EINVAL;
2056
2057 video = acpi_driver_data(device);
2058
2059 acpi_video_bus_stop_devices(video);
2060
2061 status = acpi_remove_notify_handler(video->device->handle,
2062 ACPI_DEVICE_NOTIFY,
2063 acpi_video_bus_notify);
2064
2065 acpi_video_bus_put_devices(video);
2066 acpi_video_bus_remove_fs(device);
2067
2068 input_unregister_device(video->input);
2069 kfree(video->attached_array);
2070 kfree(video);
2071
2072 return 0;
2073 }
2074
2075 static int __init acpi_video_init(void)
2076 {
2077 int result = 0;
2078
2079
2080 /*
2081 acpi_dbg_level = 0xFFFFFFFF;
2082 acpi_dbg_layer = 0x08000000;
2083 */
2084
2085 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2086 if (!acpi_video_dir)
2087 return -ENODEV;
2088 acpi_video_dir->owner = THIS_MODULE;
2089
2090 result = acpi_bus_register_driver(&acpi_video_bus);
2091 if (result < 0) {
2092 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2093 return -ENODEV;
2094 }
2095
2096 return 0;
2097 }
2098
2099 static void __exit acpi_video_exit(void)
2100 {
2101
2102 acpi_bus_unregister_driver(&acpi_video_bus);
2103
2104 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2105
2106 return;
2107 }
2108
2109 module_init(acpi_video_init);
2110 module_exit(acpi_video_exit);
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