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Linux 2.6.26-rc5
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / acpi / video.c
blob5e5dda3a3027abfa1554a9b44c5ae636cd1e7133
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 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 brightness_switch_enabled = 1;
75 module_param(brightness_switch_enabled, bool, 0644);
76
77 static int acpi_video_bus_add(struct acpi_device *device);
78 static int acpi_video_bus_remove(struct acpi_device *device, int type);
79 static int acpi_video_resume(struct acpi_device *device);
80
81 static const struct acpi_device_id video_device_ids[] = {
82 {ACPI_VIDEO_HID, 0},
83 {"", 0},
84 };
85 MODULE_DEVICE_TABLE(acpi, video_device_ids);
86
87 static struct acpi_driver acpi_video_bus = {
88 .name = "video",
89 .class = ACPI_VIDEO_CLASS,
90 .ids = video_device_ids,
91 .ops = {
92 .add = acpi_video_bus_add,
93 .remove = acpi_video_bus_remove,
94 .resume = acpi_video_resume,
95 },
96 };
97
98 struct acpi_video_bus_flags {
99 u8 multihead:1; /* can switch video heads */
100 u8 rom:1; /* can retrieve a video rom */
101 u8 post:1; /* can configure the head to */
102 u8 reserved:5;
103 };
104
105 struct acpi_video_bus_cap {
106 u8 _DOS:1; /*Enable/Disable output switching */
107 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
108 u8 _ROM:1; /*Get ROM Data */
109 u8 _GPD:1; /*Get POST Device */
110 u8 _SPD:1; /*Set POST Device */
111 u8 _VPO:1; /*Video POST Options */
112 u8 reserved:2;
113 };
114
115 struct acpi_video_device_attrib {
116 u32 display_index:4; /* A zero-based instance of the Display */
117 u32 display_port_attachment:4; /*This field differentiates the display type */
118 u32 display_type:4; /*Describe the specific type in use */
119 u32 vendor_specific:4; /*Chipset Vendor Specific */
120 u32 bios_can_detect:1; /*BIOS can detect the device */
121 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
122 the VGA device. */
123 u32 pipe_id:3; /*For VGA multiple-head devices. */
124 u32 reserved:10; /*Must be 0 */
125 u32 device_id_scheme:1; /*Device ID Scheme */
126 };
127
128 struct acpi_video_enumerated_device {
129 union {
130 u32 int_val;
131 struct acpi_video_device_attrib attrib;
132 } value;
133 struct acpi_video_device *bind_info;
134 };
135
136 struct acpi_video_bus {
137 struct acpi_device *device;
138 u8 dos_setting;
139 struct acpi_video_enumerated_device *attached_array;
140 u8 attached_count;
141 struct acpi_video_bus_cap cap;
142 struct acpi_video_bus_flags flags;
143 struct list_head video_device_list;
144 struct mutex device_list_lock; /* protects video_device_list */
145 struct proc_dir_entry *dir;
146 struct input_dev *input;
147 char phys[32]; /* for input device */
148 };
149
150 struct acpi_video_device_flags {
151 u8 crt:1;
152 u8 lcd:1;
153 u8 tvout:1;
154 u8 dvi:1;
155 u8 bios:1;
156 u8 unknown:1;
157 u8 reserved:2;
158 };
159
160 struct acpi_video_device_cap {
161 u8 _ADR:1; /*Return the unique ID */
162 u8 _BCL:1; /*Query list of brightness control levels supported */
163 u8 _BCM:1; /*Set the brightness level */
164 u8 _BQC:1; /* Get current brightness level */
165 u8 _DDC:1; /*Return the EDID for this device */
166 u8 _DCS:1; /*Return status of output device */
167 u8 _DGS:1; /*Query graphics state */
168 u8 _DSS:1; /*Device state set */
169 };
170
171 struct acpi_video_device_brightness {
172 int curr;
173 int count;
174 int *levels;
175 };
176
177 struct acpi_video_device {
178 unsigned long device_id;
179 struct acpi_video_device_flags flags;
180 struct acpi_video_device_cap cap;
181 struct list_head entry;
182 struct acpi_video_bus *video;
183 struct acpi_device *dev;
184 struct acpi_video_device_brightness *brightness;
185 struct backlight_device *backlight;
186 struct thermal_cooling_device *cdev;
187 struct output_device *output_dev;
188 };
189
190 /* bus */
191 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
192 static struct file_operations acpi_video_bus_info_fops = {
193 .owner = THIS_MODULE,
194 .open = acpi_video_bus_info_open_fs,
195 .read = seq_read,
196 .llseek = seq_lseek,
197 .release = single_release,
198 };
199
200 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
201 static struct file_operations acpi_video_bus_ROM_fops = {
202 .owner = THIS_MODULE,
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 .owner = THIS_MODULE,
213 .open = acpi_video_bus_POST_info_open_fs,
214 .read = seq_read,
215 .llseek = seq_lseek,
216 .release = single_release,
217 };
218
219 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
220 static struct file_operations acpi_video_bus_POST_fops = {
221 .owner = THIS_MODULE,
222 .open = acpi_video_bus_POST_open_fs,
223 .read = seq_read,
224 .llseek = seq_lseek,
225 .release = single_release,
226 };
227
228 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
229 static struct file_operations acpi_video_bus_DOS_fops = {
230 .owner = THIS_MODULE,
231 .open = acpi_video_bus_DOS_open_fs,
232 .read = seq_read,
233 .llseek = seq_lseek,
234 .release = single_release,
235 };
236
237 /* device */
238 static int acpi_video_device_info_open_fs(struct inode *inode,
239 struct file *file);
240 static struct file_operations acpi_video_device_info_fops = {
241 .owner = THIS_MODULE,
242 .open = acpi_video_device_info_open_fs,
243 .read = seq_read,
244 .llseek = seq_lseek,
245 .release = single_release,
246 };
247
248 static int acpi_video_device_state_open_fs(struct inode *inode,
249 struct file *file);
250 static struct file_operations acpi_video_device_state_fops = {
251 .owner = THIS_MODULE,
252 .open = acpi_video_device_state_open_fs,
253 .read = seq_read,
254 .llseek = seq_lseek,
255 .release = single_release,
256 };
257
258 static int acpi_video_device_brightness_open_fs(struct inode *inode,
259 struct file *file);
260 static struct file_operations acpi_video_device_brightness_fops = {
261 .owner = THIS_MODULE,
262 .open = acpi_video_device_brightness_open_fs,
263 .read = seq_read,
264 .llseek = seq_lseek,
265 .release = single_release,
266 };
267
268 static int acpi_video_device_EDID_open_fs(struct inode *inode,
269 struct file *file);
270 static struct file_operations acpi_video_device_EDID_fops = {
271 .owner = THIS_MODULE,
272 .open = acpi_video_device_EDID_open_fs,
273 .read = seq_read,
274 .llseek = seq_lseek,
275 .release = single_release,
276 };
277
278 static char device_decode[][30] = {
279 "motherboard VGA device",
280 "PCI VGA device",
281 "AGP VGA device",
282 "UNKNOWN",
283 };
284
285 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
286 static void acpi_video_device_rebind(struct acpi_video_bus *video);
287 static void acpi_video_device_bind(struct acpi_video_bus *video,
288 struct acpi_video_device *device);
289 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
290 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
291 int level);
292 static int acpi_video_device_lcd_get_level_current(
293 struct acpi_video_device *device,
294 unsigned long *level);
295 static int acpi_video_get_next_level(struct acpi_video_device *device,
296 u32 level_current, u32 event);
297 static void acpi_video_switch_brightness(struct acpi_video_device *device,
298 int event);
299 static int acpi_video_device_get_state(struct acpi_video_device *device,
300 unsigned long *state);
301 static int acpi_video_output_get(struct output_device *od);
302 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
303
304 /*backlight device sysfs support*/
305 static int acpi_video_get_brightness(struct backlight_device *bd)
306 {
307 unsigned long cur_level;
308 int i;
309 struct acpi_video_device *vd =
310 (struct acpi_video_device *)bl_get_data(bd);
311 acpi_video_device_lcd_get_level_current(vd, &cur_level);
312 for (i = 2; i < vd->brightness->count; i++) {
313 if (vd->brightness->levels[i] == cur_level)
314 /* The first two entries are special - see page 575
315 of the ACPI spec 3.0 */
316 return i-2;
317 }
318 return 0;
319 }
320
321 static int acpi_video_set_brightness(struct backlight_device *bd)
322 {
323 int request_level = bd->props.brightness+2;
324 struct acpi_video_device *vd =
325 (struct acpi_video_device *)bl_get_data(bd);
326 acpi_video_device_lcd_set_level(vd,
327 vd->brightness->levels[request_level]);
328 return 0;
329 }
330
331 static struct backlight_ops acpi_backlight_ops = {
332 .get_brightness = acpi_video_get_brightness,
333 .update_status = acpi_video_set_brightness,
334 };
335
336 /*video output device sysfs support*/
337 static int acpi_video_output_get(struct output_device *od)
338 {
339 unsigned long state;
340 struct acpi_video_device *vd =
341 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
342 acpi_video_device_get_state(vd, &state);
343 return (int)state;
344 }
345
346 static int acpi_video_output_set(struct output_device *od)
347 {
348 unsigned long state = od->request_state;
349 struct acpi_video_device *vd=
350 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
351 return acpi_video_device_set_state(vd, state);
352 }
353
354 static struct output_properties acpi_output_properties = {
355 .set_state = acpi_video_output_set,
356 .get_status = acpi_video_output_get,
357 };
358
359
360 /* thermal cooling device callbacks */
361 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
362 {
363 struct acpi_device *device = cdev->devdata;
364 struct acpi_video_device *video = acpi_driver_data(device);
365
366 return sprintf(buf, "%d\n", video->brightness->count - 3);
367 }
368
369 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
370 {
371 struct acpi_device *device = cdev->devdata;
372 struct acpi_video_device *video = acpi_driver_data(device);
373 unsigned long level;
374 int state;
375
376 acpi_video_device_lcd_get_level_current(video, &level);
377 for (state = 2; state < video->brightness->count; state++)
378 if (level == video->brightness->levels[state])
379 return sprintf(buf, "%d\n",
380 video->brightness->count - state - 1);
381
382 return -EINVAL;
383 }
384
385 static int
386 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
387 {
388 struct acpi_device *device = cdev->devdata;
389 struct acpi_video_device *video = acpi_driver_data(device);
390 int level;
391
392 if ( state >= video->brightness->count - 2)
393 return -EINVAL;
394
395 state = video->brightness->count - state;
396 level = video->brightness->levels[state -1];
397 return acpi_video_device_lcd_set_level(video, level);
398 }
399
400 static struct thermal_cooling_device_ops video_cooling_ops = {
401 .get_max_state = video_get_max_state,
402 .get_cur_state = video_get_cur_state,
403 .set_cur_state = video_set_cur_state,
404 };
405
406 /* --------------------------------------------------------------------------
407 Video Management
408 -------------------------------------------------------------------------- */
409
410 /* device */
411
412 static int
413 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
414 {
415 int status;
416
417 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
418
419 return status;
420 }
421
422 static int
423 acpi_video_device_get_state(struct acpi_video_device *device,
424 unsigned long *state)
425 {
426 int status;
427
428 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
429
430 return status;
431 }
432
433 static int
434 acpi_video_device_set_state(struct acpi_video_device *device, int state)
435 {
436 int status;
437 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
438 struct acpi_object_list args = { 1, &arg0 };
439 unsigned long ret;
440
441
442 arg0.integer.value = state;
443 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
444
445 return status;
446 }
447
448 static int
449 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
450 union acpi_object **levels)
451 {
452 int status;
453 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
454 union acpi_object *obj;
455
456
457 *levels = NULL;
458
459 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
460 if (!ACPI_SUCCESS(status))
461 return status;
462 obj = (union acpi_object *)buffer.pointer;
463 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
464 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
465 status = -EFAULT;
466 goto err;
467 }
468
469 *levels = obj;
470
471 return 0;
472
473 err:
474 kfree(buffer.pointer);
475
476 return status;
477 }
478
479 static int
480 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
481 {
482 int status = AE_OK;
483 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
484 struct acpi_object_list args = { 1, &arg0 };
485
486
487 arg0.integer.value = level;
488
489 if (device->cap._BCM)
490 status = acpi_evaluate_object(device->dev->handle, "_BCM",
491 &args, NULL);
492 device->brightness->curr = level;
493 return status;
494 }
495
496 static int
497 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
498 unsigned long *level)
499 {
500 if (device->cap._BQC)
501 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
502 level);
503 *level = device->brightness->curr;
504 return AE_OK;
505 }
506
507 static int
508 acpi_video_device_EDID(struct acpi_video_device *device,
509 union acpi_object **edid, ssize_t length)
510 {
511 int status;
512 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
513 union acpi_object *obj;
514 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
515 struct acpi_object_list args = { 1, &arg0 };
516
517
518 *edid = NULL;
519
520 if (!device)
521 return -ENODEV;
522 if (length == 128)
523 arg0.integer.value = 1;
524 else if (length == 256)
525 arg0.integer.value = 2;
526 else
527 return -EINVAL;
528
529 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
530 if (ACPI_FAILURE(status))
531 return -ENODEV;
532
533 obj = buffer.pointer;
534
535 if (obj && obj->type == ACPI_TYPE_BUFFER)
536 *edid = obj;
537 else {
538 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
539 status = -EFAULT;
540 kfree(obj);
541 }
542
543 return status;
544 }
545
546 /* bus */
547
548 static int
549 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
550 {
551 int status;
552 unsigned long tmp;
553 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
554 struct acpi_object_list args = { 1, &arg0 };
555
556
557 arg0.integer.value = option;
558
559 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
560 if (ACPI_SUCCESS(status))
561 status = tmp ? (-EINVAL) : (AE_OK);
562
563 return status;
564 }
565
566 static int
567 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
568 {
569 int status;
570
571 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
572
573 return status;
574 }
575
576 static int
577 acpi_video_bus_POST_options(struct acpi_video_bus *video,
578 unsigned long *options)
579 {
580 int status;
581
582 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
583 *options &= 3;
584
585 return status;
586 }
587
588 /*
589 * Arg:
590 * video : video bus device pointer
591 * bios_flag :
592 * 0. The system BIOS should NOT automatically switch(toggle)
593 * the active display output.
594 * 1. The system BIOS should automatically switch (toggle) the
595 * active display output. No switch event.
596 * 2. The _DGS value should be locked.
597 * 3. The system BIOS should not automatically switch (toggle) the
598 * active display output, but instead generate the display switch
599 * event notify code.
600 * lcd_flag :
601 * 0. The system BIOS should automatically control the brightness level
602 * of the LCD when the power changes from AC to DC
603 * 1. The system BIOS should NOT automatically control the brightness
604 * level of the LCD when the power changes from AC to DC.
605 * Return Value:
606 * -1 wrong arg.
607 */
608
609 static int
610 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
611 {
612 acpi_integer status = 0;
613 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
614 struct acpi_object_list args = { 1, &arg0 };
615
616
617 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
618 status = -1;
619 goto Failed;
620 }
621 arg0.integer.value = (lcd_flag << 2) | bios_flag;
622 video->dos_setting = arg0.integer.value;
623 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
624
625 Failed:
626 return status;
627 }
628
629 /*
630 * Arg:
631 * device : video output device (LCD, CRT, ..)
632 *
633 * Return Value:
634 * None
635 *
636 * Find out all required AML methods defined under the output
637 * device.
638 */
639
640 static void acpi_video_device_find_cap(struct acpi_video_device *device)
641 {
642 acpi_handle h_dummy1;
643 int i;
644 u32 max_level = 0;
645 union acpi_object *obj = NULL;
646 struct acpi_video_device_brightness *br = NULL;
647
648
649 memset(&device->cap, 0, sizeof(device->cap));
650
651 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
652 device->cap._ADR = 1;
653 }
654 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
655 device->cap._BCL = 1;
656 }
657 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
658 device->cap._BCM = 1;
659 }
660 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
661 device->cap._BQC = 1;
662 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
663 device->cap._DDC = 1;
664 }
665 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
666 device->cap._DCS = 1;
667 }
668 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
669 device->cap._DGS = 1;
670 }
671 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
672 device->cap._DSS = 1;
673 }
674
675 if (ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
676
677 if (obj->package.count >= 2) {
678 int count = 0;
679 union acpi_object *o;
680
681 br = kzalloc(sizeof(*br), GFP_KERNEL);
682 if (!br) {
683 printk(KERN_ERR "can't allocate memory\n");
684 } else {
685 br->levels = kmalloc(obj->package.count *
686 sizeof *(br->levels), GFP_KERNEL);
687 if (!br->levels)
688 goto out;
689
690 for (i = 0; i < obj->package.count; i++) {
691 o = (union acpi_object *)&obj->package.
692 elements[i];
693 if (o->type != ACPI_TYPE_INTEGER) {
694 printk(KERN_ERR PREFIX "Invalid data\n");
695 continue;
696 }
697 br->levels[count] = (u32) o->integer.value;
698
699 if (br->levels[count] > max_level)
700 max_level = br->levels[count];
701 count++;
702 }
703 out:
704 if (count < 2) {
705 kfree(br->levels);
706 kfree(br);
707 } else {
708 br->count = count;
709 device->brightness = br;
710 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
711 "found %d brightness levels\n",
712 count));
713 }
714 }
715 }
716
717 } else {
718 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available LCD brightness level\n"));
719 }
720
721 kfree(obj);
722
723 if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
724 int result;
725 static int count = 0;
726 char *name;
727 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
728 if (!name)
729 return;
730
731 sprintf(name, "acpi_video%d", count++);
732 device->backlight = backlight_device_register(name,
733 NULL, device, &acpi_backlight_ops);
734 device->backlight->props.max_brightness = device->brightness->count-3;
735 device->backlight->props.brightness = acpi_video_get_brightness(device->backlight);
736 backlight_update_status(device->backlight);
737 kfree(name);
738
739 device->cdev = thermal_cooling_device_register("LCD",
740 device->dev, &video_cooling_ops);
741 if (IS_ERR(device->cdev))
742 return;
743
744 printk(KERN_INFO PREFIX
745 "%s is registered as cooling_device%d\n",
746 device->dev->dev.bus_id, device->cdev->id);
747 result = sysfs_create_link(&device->dev->dev.kobj,
748 &device->cdev->device.kobj,
749 "thermal_cooling");
750 if (result)
751 printk(KERN_ERR PREFIX "Create sysfs link\n");
752 result = sysfs_create_link(&device->cdev->device.kobj,
753 &device->dev->dev.kobj, "device");
754 if (result)
755 printk(KERN_ERR PREFIX "Create sysfs link\n");
756
757 }
758 if (device->cap._DCS && device->cap._DSS){
759 static int count = 0;
760 char *name;
761 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
762 if (!name)
763 return;
764 sprintf(name, "acpi_video%d", count++);
765 device->output_dev = video_output_register(name,
766 NULL, device, &acpi_output_properties);
767 kfree(name);
768 }
769 return;
770 }
771
772 /*
773 * Arg:
774 * device : video output device (VGA)
775 *
776 * Return Value:
777 * None
778 *
779 * Find out all required AML methods defined under the video bus device.
780 */
781
782 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
783 {
784 acpi_handle h_dummy1;
785
786 memset(&video->cap, 0, sizeof(video->cap));
787 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
788 video->cap._DOS = 1;
789 }
790 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
791 video->cap._DOD = 1;
792 }
793 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
794 video->cap._ROM = 1;
795 }
796 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
797 video->cap._GPD = 1;
798 }
799 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
800 video->cap._SPD = 1;
801 }
802 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
803 video->cap._VPO = 1;
804 }
805 }
806
807 /*
808 * Check whether the video bus device has required AML method to
809 * support the desired features
810 */
811
812 static int acpi_video_bus_check(struct acpi_video_bus *video)
813 {
814 acpi_status status = -ENOENT;
815
816
817 if (!video)
818 return -EINVAL;
819
820 /* Since there is no HID, CID and so on for VGA driver, we have
821 * to check well known required nodes.
822 */
823
824 /* Does this device support video switching? */
825 if (video->cap._DOS) {
826 video->flags.multihead = 1;
827 status = 0;
828 }
829
830 /* Does this device support retrieving a video ROM? */
831 if (video->cap._ROM) {
832 video->flags.rom = 1;
833 status = 0;
834 }
835
836 /* Does this device support configuring which video device to POST? */
837 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
838 video->flags.post = 1;
839 status = 0;
840 }
841
842 return status;
843 }
844
845 /* --------------------------------------------------------------------------
846 FS Interface (/proc)
847 -------------------------------------------------------------------------- */
848
849 static struct proc_dir_entry *acpi_video_dir;
850
851 /* video devices */
852
853 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
854 {
855 struct acpi_video_device *dev = seq->private;
856
857
858 if (!dev)
859 goto end;
860
861 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
862 seq_printf(seq, "type: ");
863 if (dev->flags.crt)
864 seq_printf(seq, "CRT\n");
865 else if (dev->flags.lcd)
866 seq_printf(seq, "LCD\n");
867 else if (dev->flags.tvout)
868 seq_printf(seq, "TVOUT\n");
869 else if (dev->flags.dvi)
870 seq_printf(seq, "DVI\n");
871 else
872 seq_printf(seq, "UNKNOWN\n");
873
874 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
875
876 end:
877 return 0;
878 }
879
880 static int
881 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
882 {
883 return single_open(file, acpi_video_device_info_seq_show,
884 PDE(inode)->data);
885 }
886
887 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
888 {
889 int status;
890 struct acpi_video_device *dev = seq->private;
891 unsigned long state;
892
893
894 if (!dev)
895 goto end;
896
897 status = acpi_video_device_get_state(dev, &state);
898 seq_printf(seq, "state: ");
899 if (ACPI_SUCCESS(status))
900 seq_printf(seq, "0x%02lx\n", state);
901 else
902 seq_printf(seq, "<not supported>\n");
903
904 status = acpi_video_device_query(dev, &state);
905 seq_printf(seq, "query: ");
906 if (ACPI_SUCCESS(status))
907 seq_printf(seq, "0x%02lx\n", state);
908 else
909 seq_printf(seq, "<not supported>\n");
910
911 end:
912 return 0;
913 }
914
915 static int
916 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
917 {
918 return single_open(file, acpi_video_device_state_seq_show,
919 PDE(inode)->data);
920 }
921
922 static ssize_t
923 acpi_video_device_write_state(struct file *file,
924 const char __user * buffer,
925 size_t count, loff_t * data)
926 {
927 int status;
928 struct seq_file *m = file->private_data;
929 struct acpi_video_device *dev = m->private;
930 char str[12] = { 0 };
931 u32 state = 0;
932
933
934 if (!dev || count + 1 > sizeof str)
935 return -EINVAL;
936
937 if (copy_from_user(str, buffer, count))
938 return -EFAULT;
939
940 str[count] = 0;
941 state = simple_strtoul(str, NULL, 0);
942 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
943
944 status = acpi_video_device_set_state(dev, state);
945
946 if (status)
947 return -EFAULT;
948
949 return count;
950 }
951
952 static int
953 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
954 {
955 struct acpi_video_device *dev = seq->private;
956 int i;
957
958
959 if (!dev || !dev->brightness) {
960 seq_printf(seq, "<not supported>\n");
961 return 0;
962 }
963
964 seq_printf(seq, "levels: ");
965 for (i = 0; i < dev->brightness->count; i++)
966 seq_printf(seq, " %d", dev->brightness->levels[i]);
967 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
968
969 return 0;
970 }
971
972 static int
973 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
974 {
975 return single_open(file, acpi_video_device_brightness_seq_show,
976 PDE(inode)->data);
977 }
978
979 static ssize_t
980 acpi_video_device_write_brightness(struct file *file,
981 const char __user * buffer,
982 size_t count, loff_t * data)
983 {
984 struct seq_file *m = file->private_data;
985 struct acpi_video_device *dev = m->private;
986 char str[5] = { 0 };
987 unsigned int level = 0;
988 int i;
989
990
991 if (!dev || !dev->brightness || count + 1 > sizeof str)
992 return -EINVAL;
993
994 if (copy_from_user(str, buffer, count))
995 return -EFAULT;
996
997 str[count] = 0;
998 level = simple_strtoul(str, NULL, 0);
999
1000 if (level > 100)
1001 return -EFAULT;
1002
1003 /* validate through the list of available levels */
1004 for (i = 0; i < dev->brightness->count; i++)
1005 if (level == dev->brightness->levels[i]) {
1006 if (ACPI_SUCCESS
1007 (acpi_video_device_lcd_set_level(dev, level)))
1008 dev->brightness->curr = level;
1009 break;
1010 }
1011
1012 return count;
1013 }
1014
1015 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1016 {
1017 struct acpi_video_device *dev = seq->private;
1018 int status;
1019 int i;
1020 union acpi_object *edid = NULL;
1021
1022
1023 if (!dev)
1024 goto out;
1025
1026 status = acpi_video_device_EDID(dev, &edid, 128);
1027 if (ACPI_FAILURE(status)) {
1028 status = acpi_video_device_EDID(dev, &edid, 256);
1029 }
1030
1031 if (ACPI_FAILURE(status)) {
1032 goto out;
1033 }
1034
1035 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1036 for (i = 0; i < edid->buffer.length; i++)
1037 seq_putc(seq, edid->buffer.pointer[i]);
1038 }
1039
1040 out:
1041 if (!edid)
1042 seq_printf(seq, "<not supported>\n");
1043 else
1044 kfree(edid);
1045
1046 return 0;
1047 }
1048
1049 static int
1050 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1051 {
1052 return single_open(file, acpi_video_device_EDID_seq_show,
1053 PDE(inode)->data);
1054 }
1055
1056 static int acpi_video_device_add_fs(struct acpi_device *device)
1057 {
1058 struct proc_dir_entry *entry, *device_dir;
1059 struct acpi_video_device *vid_dev;
1060
1061 vid_dev = acpi_driver_data(device);
1062 if (!vid_dev)
1063 return -ENODEV;
1064
1065 device_dir = proc_mkdir(acpi_device_bid(device),
1066 vid_dev->video->dir);
1067 if (!device_dir)
1068 return -ENOMEM;
1069
1070 device_dir->owner = THIS_MODULE;
1071
1072 /* 'info' [R] */
1073 entry = proc_create_data("info", S_IRUGO, device_dir,
1074 &acpi_video_device_info_fops, acpi_driver_data(device));
1075 if (!entry)
1076 goto err_remove_dir;
1077
1078 /* 'state' [R/W] */
1079 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1080 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1081 device_dir,
1082 &acpi_video_device_state_fops,
1083 acpi_driver_data(device));
1084 if (!entry)
1085 goto err_remove_info;
1086
1087 /* 'brightness' [R/W] */
1088 acpi_video_device_brightness_fops.write =
1089 acpi_video_device_write_brightness;
1090 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1091 device_dir,
1092 &acpi_video_device_brightness_fops,
1093 acpi_driver_data(device));
1094 if (!entry)
1095 goto err_remove_state;
1096
1097 /* 'EDID' [R] */
1098 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1099 &acpi_video_device_EDID_fops,
1100 acpi_driver_data(device));
1101 if (!entry)
1102 goto err_remove_brightness;
1103
1104 acpi_device_dir(device) = device_dir;
1105
1106 return 0;
1107
1108 err_remove_brightness:
1109 remove_proc_entry("brightness", device_dir);
1110 err_remove_state:
1111 remove_proc_entry("state", device_dir);
1112 err_remove_info:
1113 remove_proc_entry("info", device_dir);
1114 err_remove_dir:
1115 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1116 return -ENOMEM;
1117 }
1118
1119 static int acpi_video_device_remove_fs(struct acpi_device *device)
1120 {
1121 struct acpi_video_device *vid_dev;
1122 struct proc_dir_entry *device_dir;
1123
1124 vid_dev = acpi_driver_data(device);
1125 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1126 return -ENODEV;
1127
1128 device_dir = acpi_device_dir(device);
1129 if (device_dir) {
1130 remove_proc_entry("info", device_dir);
1131 remove_proc_entry("state", device_dir);
1132 remove_proc_entry("brightness", device_dir);
1133 remove_proc_entry("EDID", device_dir);
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 acpi_video_bus *video = acpi_driver_data(device);
1341 struct proc_dir_entry *device_dir;
1342 struct proc_dir_entry *entry;
1343
1344 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1345 if (!device_dir)
1346 return -ENOMEM;
1347
1348 device_dir->owner = THIS_MODULE;
1349
1350 /* 'info' [R] */
1351 entry = proc_create_data("info", S_IRUGO, device_dir,
1352 &acpi_video_bus_info_fops,
1353 acpi_driver_data(device));
1354 if (!entry)
1355 goto err_remove_dir;
1356
1357 /* 'ROM' [R] */
1358 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1359 &acpi_video_bus_ROM_fops,
1360 acpi_driver_data(device));
1361 if (!entry)
1362 goto err_remove_info;
1363
1364 /* 'POST_info' [R] */
1365 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1366 &acpi_video_bus_POST_info_fops,
1367 acpi_driver_data(device));
1368 if (!entry)
1369 goto err_remove_rom;
1370
1371 /* 'POST' [R/W] */
1372 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1373 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1374 device_dir,
1375 &acpi_video_bus_POST_fops,
1376 acpi_driver_data(device));
1377 if (!entry)
1378 goto err_remove_post_info;
1379
1380 /* 'DOS' [R/W] */
1381 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1382 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1383 device_dir,
1384 &acpi_video_bus_DOS_fops,
1385 acpi_driver_data(device));
1386 if (!entry)
1387 goto err_remove_post;
1388
1389 video->dir = acpi_device_dir(device) = device_dir;
1390 return 0;
1391
1392 err_remove_post:
1393 remove_proc_entry("POST", device_dir);
1394 err_remove_post_info:
1395 remove_proc_entry("POST_info", device_dir);
1396 err_remove_rom:
1397 remove_proc_entry("ROM", device_dir);
1398 err_remove_info:
1399 remove_proc_entry("info", device_dir);
1400 err_remove_dir:
1401 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1402 return -ENOMEM;
1403 }
1404
1405 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1406 {
1407 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1408
1409 if (device_dir) {
1410 remove_proc_entry("info", device_dir);
1411 remove_proc_entry("ROM", device_dir);
1412 remove_proc_entry("POST_info", device_dir);
1413 remove_proc_entry("POST", device_dir);
1414 remove_proc_entry("DOS", device_dir);
1415 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1416 acpi_device_dir(device) = NULL;
1417 }
1418
1419 return 0;
1420 }
1421
1422 /* --------------------------------------------------------------------------
1423 Driver Interface
1424 -------------------------------------------------------------------------- */
1425
1426 /* device interface */
1427 static struct acpi_video_device_attrib*
1428 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1429 {
1430 struct acpi_video_enumerated_device *ids;
1431 int i;
1432
1433 for (i = 0; i < video->attached_count; i++) {
1434 ids = &video->attached_array[i];
1435 if ((ids->value.int_val & 0xffff) == device_id)
1436 return &ids->value.attrib;
1437 }
1438
1439 return NULL;
1440 }
1441
1442 static int
1443 acpi_video_bus_get_one_device(struct acpi_device *device,
1444 struct acpi_video_bus *video)
1445 {
1446 unsigned long device_id;
1447 int status;
1448 struct acpi_video_device *data;
1449 struct acpi_video_device_attrib* attribute;
1450
1451 if (!device || !video)
1452 return -EINVAL;
1453
1454 status =
1455 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1456 if (ACPI_SUCCESS(status)) {
1457
1458 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1459 if (!data)
1460 return -ENOMEM;
1461
1462 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1463 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1464 acpi_driver_data(device) = data;
1465
1466 data->device_id = device_id;
1467 data->video = video;
1468 data->dev = device;
1469
1470 attribute = acpi_video_get_device_attr(video, device_id);
1471
1472 if((attribute != NULL) && attribute->device_id_scheme) {
1473 switch (attribute->display_type) {
1474 case ACPI_VIDEO_DISPLAY_CRT:
1475 data->flags.crt = 1;
1476 break;
1477 case ACPI_VIDEO_DISPLAY_TV:
1478 data->flags.tvout = 1;
1479 break;
1480 case ACPI_VIDEO_DISPLAY_DVI:
1481 data->flags.dvi = 1;
1482 break;
1483 case ACPI_VIDEO_DISPLAY_LCD:
1484 data->flags.lcd = 1;
1485 break;
1486 default:
1487 data->flags.unknown = 1;
1488 break;
1489 }
1490 if(attribute->bios_can_detect)
1491 data->flags.bios = 1;
1492 } else
1493 data->flags.unknown = 1;
1494
1495 acpi_video_device_bind(video, data);
1496 acpi_video_device_find_cap(data);
1497
1498 status = acpi_install_notify_handler(device->handle,
1499 ACPI_DEVICE_NOTIFY,
1500 acpi_video_device_notify,
1501 data);
1502 if (ACPI_FAILURE(status)) {
1503 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1504 "Error installing notify handler\n"));
1505 if(data->brightness)
1506 kfree(data->brightness->levels);
1507 kfree(data->brightness);
1508 kfree(data);
1509 return -ENODEV;
1510 }
1511
1512 mutex_lock(&video->device_list_lock);
1513 list_add_tail(&data->entry, &video->video_device_list);
1514 mutex_unlock(&video->device_list_lock);
1515
1516 acpi_video_device_add_fs(device);
1517
1518 return 0;
1519 }
1520
1521 return -ENOENT;
1522 }
1523
1524 /*
1525 * Arg:
1526 * video : video bus device
1527 *
1528 * Return:
1529 * none
1530 *
1531 * Enumerate the video device list of the video bus,
1532 * bind the ids with the corresponding video devices
1533 * under the video bus.
1534 */
1535
1536 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1537 {
1538 struct acpi_video_device *dev;
1539
1540 mutex_lock(&video->device_list_lock);
1541
1542 list_for_each_entry(dev, &video->video_device_list, entry)
1543 acpi_video_device_bind(video, dev);
1544
1545 mutex_unlock(&video->device_list_lock);
1546 }
1547
1548 /*
1549 * Arg:
1550 * video : video bus device
1551 * device : video output device under the video
1552 * bus
1553 *
1554 * Return:
1555 * none
1556 *
1557 * Bind the ids with the corresponding video devices
1558 * under the video bus.
1559 */
1560
1561 static void
1562 acpi_video_device_bind(struct acpi_video_bus *video,
1563 struct acpi_video_device *device)
1564 {
1565 struct acpi_video_enumerated_device *ids;
1566 int i;
1567
1568 for (i = 0; i < video->attached_count; i++) {
1569 ids = &video->attached_array[i];
1570 if (device->device_id == (ids->value.int_val & 0xffff)) {
1571 ids->bind_info = device;
1572 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1573 }
1574 }
1575 }
1576
1577 /*
1578 * Arg:
1579 * video : video bus device
1580 *
1581 * Return:
1582 * < 0 : error
1583 *
1584 * Call _DOD to enumerate all devices attached to display adapter
1585 *
1586 */
1587
1588 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1589 {
1590 int status;
1591 int count;
1592 int i;
1593 struct acpi_video_enumerated_device *active_list;
1594 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1595 union acpi_object *dod = NULL;
1596 union acpi_object *obj;
1597
1598 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1599 if (!ACPI_SUCCESS(status)) {
1600 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1601 return status;
1602 }
1603
1604 dod = buffer.pointer;
1605 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1606 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1607 status = -EFAULT;
1608 goto out;
1609 }
1610
1611 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1612 dod->package.count));
1613
1614 active_list = kcalloc(1 + dod->package.count,
1615 sizeof(struct acpi_video_enumerated_device),
1616 GFP_KERNEL);
1617 if (!active_list) {
1618 status = -ENOMEM;
1619 goto out;
1620 }
1621
1622 count = 0;
1623 for (i = 0; i < dod->package.count; i++) {
1624 obj = &dod->package.elements[i];
1625
1626 if (obj->type != ACPI_TYPE_INTEGER) {
1627 printk(KERN_ERR PREFIX
1628 "Invalid _DOD data in element %d\n", i);
1629 continue;
1630 }
1631
1632 active_list[count].value.int_val = obj->integer.value;
1633 active_list[count].bind_info = NULL;
1634 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1635 (int)obj->integer.value));
1636 count++;
1637 }
1638
1639 kfree(video->attached_array);
1640
1641 video->attached_array = active_list;
1642 video->attached_count = count;
1643
1644 out:
1645 kfree(buffer.pointer);
1646 return status;
1647 }
1648
1649 static int
1650 acpi_video_get_next_level(struct acpi_video_device *device,
1651 u32 level_current, u32 event)
1652 {
1653 int min, max, min_above, max_below, i, l, delta = 255;
1654 max = max_below = 0;
1655 min = min_above = 255;
1656 /* Find closest level to level_current */
1657 for (i = 0; i < device->brightness->count; i++) {
1658 l = device->brightness->levels[i];
1659 if (abs(l - level_current) < abs(delta)) {
1660 delta = l - level_current;
1661 if (!delta)
1662 break;
1663 }
1664 }
1665 /* Ajust level_current to closest available level */
1666 level_current += delta;
1667 for (i = 0; i < device->brightness->count; i++) {
1668 l = device->brightness->levels[i];
1669 if (l < min)
1670 min = l;
1671 if (l > max)
1672 max = l;
1673 if (l < min_above && l > level_current)
1674 min_above = l;
1675 if (l > max_below && l < level_current)
1676 max_below = l;
1677 }
1678
1679 switch (event) {
1680 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1681 return (level_current < max) ? min_above : min;
1682 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1683 return (level_current < max) ? min_above : max;
1684 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1685 return (level_current > min) ? max_below : min;
1686 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1687 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1688 return 0;
1689 default:
1690 return level_current;
1691 }
1692 }
1693
1694 static void
1695 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1696 {
1697 unsigned long level_current, level_next;
1698 acpi_video_device_lcd_get_level_current(device, &level_current);
1699 level_next = acpi_video_get_next_level(device, level_current, event);
1700 acpi_video_device_lcd_set_level(device, level_next);
1701 }
1702
1703 static int
1704 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1705 struct acpi_device *device)
1706 {
1707 int status = 0;
1708 struct acpi_device *dev;
1709
1710 acpi_video_device_enumerate(video);
1711
1712 list_for_each_entry(dev, &device->children, node) {
1713
1714 status = acpi_video_bus_get_one_device(dev, video);
1715 if (ACPI_FAILURE(status)) {
1716 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1717 continue;
1718 }
1719 }
1720 return status;
1721 }
1722
1723 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1724 {
1725 acpi_status status;
1726 struct acpi_video_bus *video;
1727
1728
1729 if (!device || !device->video)
1730 return -ENOENT;
1731
1732 video = device->video;
1733
1734 acpi_video_device_remove_fs(device->dev);
1735
1736 status = acpi_remove_notify_handler(device->dev->handle,
1737 ACPI_DEVICE_NOTIFY,
1738 acpi_video_device_notify);
1739 backlight_device_unregister(device->backlight);
1740 if (device->cdev) {
1741 sysfs_remove_link(&device->dev->dev.kobj,
1742 "thermal_cooling");
1743 sysfs_remove_link(&device->cdev->device.kobj,
1744 "device");
1745 thermal_cooling_device_unregister(device->cdev);
1746 device->cdev = NULL;
1747 }
1748 video_output_unregister(device->output_dev);
1749
1750 return 0;
1751 }
1752
1753 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1754 {
1755 int status;
1756 struct acpi_video_device *dev, *next;
1757
1758 mutex_lock(&video->device_list_lock);
1759
1760 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1761
1762 status = acpi_video_bus_put_one_device(dev);
1763 if (ACPI_FAILURE(status))
1764 printk(KERN_WARNING PREFIX
1765 "hhuuhhuu bug in acpi video driver.\n");
1766
1767 if (dev->brightness) {
1768 kfree(dev->brightness->levels);
1769 kfree(dev->brightness);
1770 }
1771 list_del(&dev->entry);
1772 kfree(dev);
1773 }
1774
1775 mutex_unlock(&video->device_list_lock);
1776
1777 return 0;
1778 }
1779
1780 /* acpi_video interface */
1781
1782 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1783 {
1784 return acpi_video_bus_DOS(video, 0, 0);
1785 }
1786
1787 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1788 {
1789 return acpi_video_bus_DOS(video, 0, 1);
1790 }
1791
1792 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1793 {
1794 struct acpi_video_bus *video = data;
1795 struct acpi_device *device = NULL;
1796 struct input_dev *input;
1797 int keycode;
1798
1799 if (!video)
1800 return;
1801
1802 device = video->device;
1803 input = video->input;
1804
1805 switch (event) {
1806 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1807 * most likely via hotkey. */
1808 acpi_bus_generate_proc_event(device, event, 0);
1809 keycode = KEY_SWITCHVIDEOMODE;
1810 break;
1811
1812 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1813 * connector. */
1814 acpi_video_device_enumerate(video);
1815 acpi_video_device_rebind(video);
1816 acpi_bus_generate_proc_event(device, event, 0);
1817 keycode = KEY_SWITCHVIDEOMODE;
1818 break;
1819
1820 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1821 acpi_bus_generate_proc_event(device, event, 0);
1822 keycode = KEY_SWITCHVIDEOMODE;
1823 break;
1824 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1825 acpi_bus_generate_proc_event(device, event, 0);
1826 keycode = KEY_VIDEO_NEXT;
1827 break;
1828 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1829 acpi_bus_generate_proc_event(device, event, 0);
1830 keycode = KEY_VIDEO_PREV;
1831 break;
1832
1833 default:
1834 keycode = KEY_UNKNOWN;
1835 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1836 "Unsupported event [0x%x]\n", event));
1837 break;
1838 }
1839
1840 acpi_notifier_call_chain(device, event, 0);
1841 input_report_key(input, keycode, 1);
1842 input_sync(input);
1843 input_report_key(input, keycode, 0);
1844 input_sync(input);
1845
1846 return;
1847 }
1848
1849 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1850 {
1851 struct acpi_video_device *video_device = data;
1852 struct acpi_device *device = NULL;
1853 struct acpi_video_bus *bus;
1854 struct input_dev *input;
1855 int keycode;
1856
1857 if (!video_device)
1858 return;
1859
1860 device = video_device->dev;
1861 bus = video_device->video;
1862 input = bus->input;
1863
1864 switch (event) {
1865 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1866 if (brightness_switch_enabled)
1867 acpi_video_switch_brightness(video_device, event);
1868 acpi_bus_generate_proc_event(device, event, 0);
1869 keycode = KEY_BRIGHTNESS_CYCLE;
1870 break;
1871 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1872 if (brightness_switch_enabled)
1873 acpi_video_switch_brightness(video_device, event);
1874 acpi_bus_generate_proc_event(device, event, 0);
1875 keycode = KEY_BRIGHTNESSUP;
1876 break;
1877 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1878 if (brightness_switch_enabled)
1879 acpi_video_switch_brightness(video_device, event);
1880 acpi_bus_generate_proc_event(device, event, 0);
1881 keycode = KEY_BRIGHTNESSDOWN;
1882 break;
1883 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1884 if (brightness_switch_enabled)
1885 acpi_video_switch_brightness(video_device, event);
1886 acpi_bus_generate_proc_event(device, event, 0);
1887 keycode = KEY_BRIGHTNESS_ZERO;
1888 break;
1889 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1890 if (brightness_switch_enabled)
1891 acpi_video_switch_brightness(video_device, event);
1892 acpi_bus_generate_proc_event(device, event, 0);
1893 keycode = KEY_DISPLAY_OFF;
1894 break;
1895 default:
1896 keycode = KEY_UNKNOWN;
1897 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1898 "Unsupported event [0x%x]\n", event));
1899 break;
1900 }
1901
1902 acpi_notifier_call_chain(device, event, 0);
1903 input_report_key(input, keycode, 1);
1904 input_sync(input);
1905 input_report_key(input, keycode, 0);
1906 input_sync(input);
1907
1908 return;
1909 }
1910
1911 static int instance;
1912 static int acpi_video_resume(struct acpi_device *device)
1913 {
1914 struct acpi_video_bus *video;
1915 struct acpi_video_device *video_device;
1916 int i;
1917
1918 if (!device || !acpi_driver_data(device))
1919 return -EINVAL;
1920
1921 video = acpi_driver_data(device);
1922
1923 for (i = 0; i < video->attached_count; i++) {
1924 video_device = video->attached_array[i].bind_info;
1925 if (video_device && video_device->backlight)
1926 acpi_video_set_brightness(video_device->backlight);
1927 }
1928 return AE_OK;
1929 }
1930
1931 static int acpi_video_bus_add(struct acpi_device *device)
1932 {
1933 acpi_status status;
1934 struct acpi_video_bus *video;
1935 struct input_dev *input;
1936 int error;
1937
1938 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1939 if (!video)
1940 return -ENOMEM;
1941
1942 /* a hack to fix the duplicate name "VID" problem on T61 */
1943 if (!strcmp(device->pnp.bus_id, "VID")) {
1944 if (instance)
1945 device->pnp.bus_id[3] = '0' + instance;
1946 instance ++;
1947 }
1948
1949 video->device = device;
1950 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1951 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1952 acpi_driver_data(device) = video;
1953
1954 acpi_video_bus_find_cap(video);
1955 error = acpi_video_bus_check(video);
1956 if (error)
1957 goto err_free_video;
1958
1959 error = acpi_video_bus_add_fs(device);
1960 if (error)
1961 goto err_free_video;
1962
1963 mutex_init(&video->device_list_lock);
1964 INIT_LIST_HEAD(&video->video_device_list);
1965
1966 acpi_video_bus_get_devices(video, device);
1967 acpi_video_bus_start_devices(video);
1968
1969 status = acpi_install_notify_handler(device->handle,
1970 ACPI_DEVICE_NOTIFY,
1971 acpi_video_bus_notify, video);
1972 if (ACPI_FAILURE(status)) {
1973 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1974 "Error installing notify handler\n"));
1975 error = -ENODEV;
1976 goto err_stop_video;
1977 }
1978
1979 video->input = input = input_allocate_device();
1980 if (!input) {
1981 error = -ENOMEM;
1982 goto err_uninstall_notify;
1983 }
1984
1985 snprintf(video->phys, sizeof(video->phys),
1986 "%s/video/input0", acpi_device_hid(video->device));
1987
1988 input->name = acpi_device_name(video->device);
1989 input->phys = video->phys;
1990 input->id.bustype = BUS_HOST;
1991 input->id.product = 0x06;
1992 input->dev.parent = &device->dev;
1993 input->evbit[0] = BIT(EV_KEY);
1994 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
1995 set_bit(KEY_VIDEO_NEXT, input->keybit);
1996 set_bit(KEY_VIDEO_PREV, input->keybit);
1997 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
1998 set_bit(KEY_BRIGHTNESSUP, input->keybit);
1999 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2000 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2001 set_bit(KEY_DISPLAY_OFF, input->keybit);
2002 set_bit(KEY_UNKNOWN, input->keybit);
2003
2004 error = input_register_device(input);
2005 if (error)
2006 goto err_free_input_dev;
2007
2008 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2009 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2010 video->flags.multihead ? "yes" : "no",
2011 video->flags.rom ? "yes" : "no",
2012 video->flags.post ? "yes" : "no");
2013
2014 return 0;
2015
2016 err_free_input_dev:
2017 input_free_device(input);
2018 err_uninstall_notify:
2019 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2020 acpi_video_bus_notify);
2021 err_stop_video:
2022 acpi_video_bus_stop_devices(video);
2023 acpi_video_bus_put_devices(video);
2024 kfree(video->attached_array);
2025 acpi_video_bus_remove_fs(device);
2026 err_free_video:
2027 kfree(video);
2028 acpi_driver_data(device) = NULL;
2029
2030 return error;
2031 }
2032
2033 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2034 {
2035 acpi_status status = 0;
2036 struct acpi_video_bus *video = NULL;
2037
2038
2039 if (!device || !acpi_driver_data(device))
2040 return -EINVAL;
2041
2042 video = acpi_driver_data(device);
2043
2044 acpi_video_bus_stop_devices(video);
2045
2046 status = acpi_remove_notify_handler(video->device->handle,
2047 ACPI_DEVICE_NOTIFY,
2048 acpi_video_bus_notify);
2049
2050 acpi_video_bus_put_devices(video);
2051 acpi_video_bus_remove_fs(device);
2052
2053 input_unregister_device(video->input);
2054 kfree(video->attached_array);
2055 kfree(video);
2056
2057 return 0;
2058 }
2059
2060 static int __init acpi_video_init(void)
2061 {
2062 int result = 0;
2063
2064
2065 /*
2066 acpi_dbg_level = 0xFFFFFFFF;
2067 acpi_dbg_layer = 0x08000000;
2068 */
2069
2070 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2071 if (!acpi_video_dir)
2072 return -ENODEV;
2073 acpi_video_dir->owner = THIS_MODULE;
2074
2075 result = acpi_bus_register_driver(&acpi_video_bus);
2076 if (result < 0) {
2077 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2078 return -ENODEV;
2079 }
2080
2081 return 0;
2082 }
2083
2084 static void __exit acpi_video_exit(void)
2085 {
2086
2087 acpi_bus_unregister_driver(&acpi_video_bus);
2088
2089 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2090
2091 return;
2092 }
2093
2094 module_init(acpi_video_init);
2095 module_exit(acpi_video_exit);
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