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USB: musb: sysfs mode updates
[linux-2.6/mini2440.git] / drivers / acpi / video.c
blobbaa4419297209efd6d79aaedb2dae13c2d1a6f92
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_CLASS "video"
45 #define ACPI_VIDEO_BUS_NAME "Video Bus"
46 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
47 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
48 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
49 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
50 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
51 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
52
53 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
54 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
55 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
56 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
57 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
58
59 #define MAX_NAME_LEN 20
60
61 #define ACPI_VIDEO_DISPLAY_CRT 1
62 #define ACPI_VIDEO_DISPLAY_TV 2
63 #define ACPI_VIDEO_DISPLAY_DVI 3
64 #define ACPI_VIDEO_DISPLAY_LCD 4
65
66 #define _COMPONENT ACPI_VIDEO_COMPONENT
67 ACPI_MODULE_NAME("video");
68
69 MODULE_AUTHOR("Bruno Ducrot");
70 MODULE_DESCRIPTION("ACPI Video Driver");
71 MODULE_LICENSE("GPL");
72
73 static int brightness_switch_enabled = 1;
74 module_param(brightness_switch_enabled, bool, 0644);
75
76 static int acpi_video_bus_add(struct acpi_device *device);
77 static int acpi_video_bus_remove(struct acpi_device *device, int type);
78 static int acpi_video_resume(struct acpi_device *device);
79
80 static const struct acpi_device_id video_device_ids[] = {
81 {ACPI_VIDEO_HID, 0},
82 {"", 0},
83 };
84 MODULE_DEVICE_TABLE(acpi, video_device_ids);
85
86 static struct acpi_driver acpi_video_bus = {
87 .name = "video",
88 .class = ACPI_VIDEO_CLASS,
89 .ids = video_device_ids,
90 .ops = {
91 .add = acpi_video_bus_add,
92 .remove = acpi_video_bus_remove,
93 .resume = acpi_video_resume,
94 },
95 };
96
97 struct acpi_video_bus_flags {
98 u8 multihead:1; /* can switch video heads */
99 u8 rom:1; /* can retrieve a video rom */
100 u8 post:1; /* can configure the head to */
101 u8 reserved:5;
102 };
103
104 struct acpi_video_bus_cap {
105 u8 _DOS:1; /*Enable/Disable output switching */
106 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
107 u8 _ROM:1; /*Get ROM Data */
108 u8 _GPD:1; /*Get POST Device */
109 u8 _SPD:1; /*Set POST Device */
110 u8 _VPO:1; /*Video POST Options */
111 u8 reserved:2;
112 };
113
114 struct acpi_video_device_attrib {
115 u32 display_index:4; /* A zero-based instance of the Display */
116 u32 display_port_attachment:4; /*This field differentiates the display type */
117 u32 display_type:4; /*Describe the specific type in use */
118 u32 vendor_specific:4; /*Chipset Vendor Specific */
119 u32 bios_can_detect:1; /*BIOS can detect the device */
120 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
121 the VGA device. */
122 u32 pipe_id:3; /*For VGA multiple-head devices. */
123 u32 reserved:10; /*Must be 0 */
124 u32 device_id_scheme:1; /*Device ID Scheme */
125 };
126
127 struct acpi_video_enumerated_device {
128 union {
129 u32 int_val;
130 struct acpi_video_device_attrib attrib;
131 } value;
132 struct acpi_video_device *bind_info;
133 };
134
135 struct acpi_video_bus {
136 struct acpi_device *device;
137 u8 dos_setting;
138 struct acpi_video_enumerated_device *attached_array;
139 u8 attached_count;
140 struct acpi_video_bus_cap cap;
141 struct acpi_video_bus_flags flags;
142 struct list_head video_device_list;
143 struct mutex device_list_lock; /* protects video_device_list */
144 struct proc_dir_entry *dir;
145 struct input_dev *input;
146 char phys[32]; /* for input device */
147 };
148
149 struct acpi_video_device_flags {
150 u8 crt:1;
151 u8 lcd:1;
152 u8 tvout:1;
153 u8 dvi:1;
154 u8 bios:1;
155 u8 unknown:1;
156 u8 reserved:2;
157 };
158
159 struct acpi_video_device_cap {
160 u8 _ADR:1; /*Return the unique ID */
161 u8 _BCL:1; /*Query list of brightness control levels supported */
162 u8 _BCM:1; /*Set the brightness level */
163 u8 _BQC:1; /* Get current brightness level */
164 u8 _DDC:1; /*Return the EDID for this device */
165 u8 _DCS:1; /*Return status of output device */
166 u8 _DGS:1; /*Query graphics state */
167 u8 _DSS:1; /*Device state set */
168 };
169
170 struct acpi_video_device_brightness {
171 int curr;
172 int count;
173 int *levels;
174 };
175
176 struct acpi_video_device {
177 unsigned long device_id;
178 struct acpi_video_device_flags flags;
179 struct acpi_video_device_cap cap;
180 struct list_head entry;
181 struct acpi_video_bus *video;
182 struct acpi_device *dev;
183 struct acpi_video_device_brightness *brightness;
184 struct backlight_device *backlight;
185 struct thermal_cooling_device *cdev;
186 struct output_device *output_dev;
187 };
188
189 /* bus */
190 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
191 static struct file_operations acpi_video_bus_info_fops = {
192 .owner = THIS_MODULE,
193 .open = acpi_video_bus_info_open_fs,
194 .read = seq_read,
195 .llseek = seq_lseek,
196 .release = single_release,
197 };
198
199 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
200 static struct file_operations acpi_video_bus_ROM_fops = {
201 .owner = THIS_MODULE,
202 .open = acpi_video_bus_ROM_open_fs,
203 .read = seq_read,
204 .llseek = seq_lseek,
205 .release = single_release,
206 };
207
208 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
209 struct file *file);
210 static struct file_operations acpi_video_bus_POST_info_fops = {
211 .owner = THIS_MODULE,
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 .owner = THIS_MODULE,
221 .open = acpi_video_bus_POST_open_fs,
222 .read = seq_read,
223 .llseek = seq_lseek,
224 .release = single_release,
225 };
226
227 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
228 static struct file_operations acpi_video_bus_DOS_fops = {
229 .owner = THIS_MODULE,
230 .open = acpi_video_bus_DOS_open_fs,
231 .read = seq_read,
232 .llseek = seq_lseek,
233 .release = single_release,
234 };
235
236 /* device */
237 static int acpi_video_device_info_open_fs(struct inode *inode,
238 struct file *file);
239 static struct file_operations acpi_video_device_info_fops = {
240 .owner = THIS_MODULE,
241 .open = acpi_video_device_info_open_fs,
242 .read = seq_read,
243 .llseek = seq_lseek,
244 .release = single_release,
245 };
246
247 static int acpi_video_device_state_open_fs(struct inode *inode,
248 struct file *file);
249 static struct file_operations acpi_video_device_state_fops = {
250 .owner = THIS_MODULE,
251 .open = acpi_video_device_state_open_fs,
252 .read = seq_read,
253 .llseek = seq_lseek,
254 .release = single_release,
255 };
256
257 static int acpi_video_device_brightness_open_fs(struct inode *inode,
258 struct file *file);
259 static struct file_operations acpi_video_device_brightness_fops = {
260 .owner = THIS_MODULE,
261 .open = acpi_video_device_brightness_open_fs,
262 .read = seq_read,
263 .llseek = seq_lseek,
264 .release = single_release,
265 };
266
267 static int acpi_video_device_EDID_open_fs(struct inode *inode,
268 struct file *file);
269 static struct file_operations acpi_video_device_EDID_fops = {
270 .owner = THIS_MODULE,
271 .open = acpi_video_device_EDID_open_fs,
272 .read = seq_read,
273 .llseek = seq_lseek,
274 .release = single_release,
275 };
276
277 static char device_decode[][30] = {
278 "motherboard VGA device",
279 "PCI VGA device",
280 "AGP VGA device",
281 "UNKNOWN",
282 };
283
284 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
285 static void acpi_video_device_rebind(struct acpi_video_bus *video);
286 static void acpi_video_device_bind(struct acpi_video_bus *video,
287 struct acpi_video_device *device);
288 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
289 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
290 int level);
291 static int acpi_video_device_lcd_get_level_current(
292 struct acpi_video_device *device,
293 unsigned long long *level);
294 static int acpi_video_get_next_level(struct acpi_video_device *device,
295 u32 level_current, u32 event);
296 static void acpi_video_switch_brightness(struct acpi_video_device *device,
297 int event);
298 static int acpi_video_device_get_state(struct acpi_video_device *device,
299 unsigned long long *state);
300 static int acpi_video_output_get(struct output_device *od);
301 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
302
303 /*backlight device sysfs support*/
304 static int acpi_video_get_brightness(struct backlight_device *bd)
305 {
306 unsigned long long cur_level;
307 int i;
308 struct acpi_video_device *vd =
309 (struct acpi_video_device *)bl_get_data(bd);
310 acpi_video_device_lcd_get_level_current(vd, &cur_level);
311 for (i = 2; i < vd->brightness->count; i++) {
312 if (vd->brightness->levels[i] == cur_level)
313 /* The first two entries are special - see page 575
314 of the ACPI spec 3.0 */
315 return i-2;
316 }
317 return 0;
318 }
319
320 static int acpi_video_set_brightness(struct backlight_device *bd)
321 {
322 int request_level = bd->props.brightness+2;
323 struct acpi_video_device *vd =
324 (struct acpi_video_device *)bl_get_data(bd);
325 acpi_video_device_lcd_set_level(vd,
326 vd->brightness->levels[request_level]);
327 return 0;
328 }
329
330 static struct backlight_ops acpi_backlight_ops = {
331 .get_brightness = acpi_video_get_brightness,
332 .update_status = acpi_video_set_brightness,
333 };
334
335 /*video output device sysfs support*/
336 static int acpi_video_output_get(struct output_device *od)
337 {
338 unsigned long long state;
339 struct acpi_video_device *vd =
340 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
341 acpi_video_device_get_state(vd, &state);
342 return (int)state;
343 }
344
345 static int acpi_video_output_set(struct output_device *od)
346 {
347 unsigned long state = od->request_state;
348 struct acpi_video_device *vd=
349 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
350 return acpi_video_device_set_state(vd, state);
351 }
352
353 static struct output_properties acpi_output_properties = {
354 .set_state = acpi_video_output_set,
355 .get_status = acpi_video_output_get,
356 };
357
358
359 /* thermal cooling device callbacks */
360 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
361 {
362 struct acpi_device *device = cdev->devdata;
363 struct acpi_video_device *video = acpi_driver_data(device);
364
365 return sprintf(buf, "%d\n", video->brightness->count - 3);
366 }
367
368 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
369 {
370 struct acpi_device *device = cdev->devdata;
371 struct acpi_video_device *video = acpi_driver_data(device);
372 unsigned long long level;
373 int state;
374
375 acpi_video_device_lcd_get_level_current(video, &level);
376 for (state = 2; state < video->brightness->count; state++)
377 if (level == video->brightness->levels[state])
378 return sprintf(buf, "%d\n",
379 video->brightness->count - state - 1);
380
381 return -EINVAL;
382 }
383
384 static int
385 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
386 {
387 struct acpi_device *device = cdev->devdata;
388 struct acpi_video_device *video = acpi_driver_data(device);
389 int level;
390
391 if ( state >= video->brightness->count - 2)
392 return -EINVAL;
393
394 state = video->brightness->count - state;
395 level = video->brightness->levels[state -1];
396 return acpi_video_device_lcd_set_level(video, level);
397 }
398
399 static struct thermal_cooling_device_ops video_cooling_ops = {
400 .get_max_state = video_get_max_state,
401 .get_cur_state = video_get_cur_state,
402 .set_cur_state = video_set_cur_state,
403 };
404
405 /* --------------------------------------------------------------------------
406 Video Management
407 -------------------------------------------------------------------------- */
408
409 /* device */
410
411 static int
412 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
413 {
414 int status;
415
416 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
417
418 return status;
419 }
420
421 static int
422 acpi_video_device_get_state(struct acpi_video_device *device,
423 unsigned long long *state)
424 {
425 int status;
426
427 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
428
429 return status;
430 }
431
432 static int
433 acpi_video_device_set_state(struct acpi_video_device *device, int state)
434 {
435 int status;
436 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
437 struct acpi_object_list args = { 1, &arg0 };
438 unsigned long long ret;
439
440
441 arg0.integer.value = state;
442 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
443
444 return status;
445 }
446
447 static int
448 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
449 union acpi_object **levels)
450 {
451 int status;
452 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
453 union acpi_object *obj;
454
455
456 *levels = NULL;
457
458 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
459 if (!ACPI_SUCCESS(status))
460 return status;
461 obj = (union acpi_object *)buffer.pointer;
462 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
463 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
464 status = -EFAULT;
465 goto err;
466 }
467
468 *levels = obj;
469
470 return 0;
471
472 err:
473 kfree(buffer.pointer);
474
475 return status;
476 }
477
478 static int
479 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
480 {
481 int status = AE_OK;
482 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
483 struct acpi_object_list args = { 1, &arg0 };
484
485
486 arg0.integer.value = level;
487
488 if (device->cap._BCM)
489 status = acpi_evaluate_object(device->dev->handle, "_BCM",
490 &args, NULL);
491 device->brightness->curr = level;
492 return status;
493 }
494
495 static int
496 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
497 unsigned long long *level)
498 {
499 if (device->cap._BQC)
500 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
501 level);
502 *level = device->brightness->curr;
503 return AE_OK;
504 }
505
506 static int
507 acpi_video_device_EDID(struct acpi_video_device *device,
508 union acpi_object **edid, ssize_t length)
509 {
510 int status;
511 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
512 union acpi_object *obj;
513 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
514 struct acpi_object_list args = { 1, &arg0 };
515
516
517 *edid = NULL;
518
519 if (!device)
520 return -ENODEV;
521 if (length == 128)
522 arg0.integer.value = 1;
523 else if (length == 256)
524 arg0.integer.value = 2;
525 else
526 return -EINVAL;
527
528 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
529 if (ACPI_FAILURE(status))
530 return -ENODEV;
531
532 obj = buffer.pointer;
533
534 if (obj && obj->type == ACPI_TYPE_BUFFER)
535 *edid = obj;
536 else {
537 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
538 status = -EFAULT;
539 kfree(obj);
540 }
541
542 return status;
543 }
544
545 /* bus */
546
547 static int
548 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
549 {
550 int status;
551 unsigned long long tmp;
552 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
553 struct acpi_object_list args = { 1, &arg0 };
554
555
556 arg0.integer.value = option;
557
558 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
559 if (ACPI_SUCCESS(status))
560 status = tmp ? (-EINVAL) : (AE_OK);
561
562 return status;
563 }
564
565 static int
566 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
567 {
568 int status;
569
570 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
571
572 return status;
573 }
574
575 static int
576 acpi_video_bus_POST_options(struct acpi_video_bus *video,
577 unsigned long long *options)
578 {
579 int status;
580
581 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
582 *options &= 3;
583
584 return status;
585 }
586
587 /*
588 * Arg:
589 * video : video bus device pointer
590 * bios_flag :
591 * 0. The system BIOS should NOT automatically switch(toggle)
592 * the active display output.
593 * 1. The system BIOS should automatically switch (toggle) the
594 * active display output. No switch event.
595 * 2. The _DGS value should be locked.
596 * 3. The system BIOS should not automatically switch (toggle) the
597 * active display output, but instead generate the display switch
598 * event notify code.
599 * lcd_flag :
600 * 0. The system BIOS should automatically control the brightness level
601 * of the LCD when the power changes from AC to DC
602 * 1. The system BIOS should NOT automatically control the brightness
603 * level of the LCD when the power changes from AC to DC.
604 * Return Value:
605 * -1 wrong arg.
606 */
607
608 static int
609 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
610 {
611 acpi_integer status = 0;
612 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
613 struct acpi_object_list args = { 1, &arg0 };
614
615
616 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
617 status = -1;
618 goto Failed;
619 }
620 arg0.integer.value = (lcd_flag << 2) | bios_flag;
621 video->dos_setting = arg0.integer.value;
622 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
623
624 Failed:
625 return status;
626 }
627
628 /*
629 * Arg:
630 * device : video output device (LCD, CRT, ..)
631 *
632 * Return Value:
633 * Maximum brightness level
634 *
635 * Allocate and initialize device->brightness.
636 */
637
638 static int
639 acpi_video_init_brightness(struct acpi_video_device *device)
640 {
641 union acpi_object *obj = NULL;
642 int i, max_level = 0, count = 0;
643 union acpi_object *o;
644 struct acpi_video_device_brightness *br = NULL;
645
646 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
647 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
648 "LCD brightness level\n"));
649 goto out;
650 }
651
652 if (obj->package.count < 2)
653 goto out;
654
655 br = kzalloc(sizeof(*br), GFP_KERNEL);
656 if (!br) {
657 printk(KERN_ERR "can't allocate memory\n");
658 goto out;
659 }
660
661 br->levels = kmalloc(obj->package.count * sizeof *(br->levels),
662 GFP_KERNEL);
663 if (!br->levels)
664 goto out_free;
665
666 for (i = 0; i < obj->package.count; i++) {
667 o = (union acpi_object *)&obj->package.elements[i];
668 if (o->type != ACPI_TYPE_INTEGER) {
669 printk(KERN_ERR PREFIX "Invalid data\n");
670 continue;
671 }
672 br->levels[count] = (u32) o->integer.value;
673
674 if (br->levels[count] > max_level)
675 max_level = br->levels[count];
676 count++;
677 }
678
679 if (count < 2)
680 goto out_free_levels;
681
682 br->count = count;
683 device->brightness = br;
684 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "found %d brightness levels\n", count));
685 kfree(obj);
686 return max_level;
687
688 out_free_levels:
689 kfree(br->levels);
690 out_free:
691 kfree(br);
692 out:
693 device->brightness = NULL;
694 kfree(obj);
695 return 0;
696 }
697
698 /*
699 * Arg:
700 * device : video output device (LCD, CRT, ..)
701 *
702 * Return Value:
703 * None
704 *
705 * Find out all required AML methods defined under the output
706 * device.
707 */
708
709 static void acpi_video_device_find_cap(struct acpi_video_device *device)
710 {
711 acpi_handle h_dummy1;
712 u32 max_level = 0;
713
714
715 memset(&device->cap, 0, sizeof(device->cap));
716
717 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
718 device->cap._ADR = 1;
719 }
720 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
721 device->cap._BCL = 1;
722 }
723 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
724 device->cap._BCM = 1;
725 }
726 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
727 device->cap._BQC = 1;
728 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
729 device->cap._DDC = 1;
730 }
731 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
732 device->cap._DCS = 1;
733 }
734 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
735 device->cap._DGS = 1;
736 }
737 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
738 device->cap._DSS = 1;
739 }
740
741 if (acpi_video_backlight_support())
742 max_level = acpi_video_init_brightness(device);
743
744 if (device->cap._BCL && device->cap._BCM && max_level > 0) {
745 int result;
746 static int count = 0;
747 char *name;
748 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
749 if (!name)
750 return;
751
752 sprintf(name, "acpi_video%d", count++);
753 device->backlight = backlight_device_register(name,
754 NULL, device, &acpi_backlight_ops);
755 device->backlight->props.max_brightness = device->brightness->count-3;
756 /*
757 * If there exists the _BQC object, the _BQC object will be
758 * called to get the current backlight brightness. Otherwise
759 * the brightness will be set to the maximum.
760 */
761 if (device->cap._BQC)
762 device->backlight->props.brightness =
763 acpi_video_get_brightness(device->backlight);
764 else
765 device->backlight->props.brightness =
766 device->backlight->props.max_brightness;
767 backlight_update_status(device->backlight);
768 kfree(name);
769
770 device->cdev = thermal_cooling_device_register("LCD",
771 device->dev, &video_cooling_ops);
772 if (IS_ERR(device->cdev))
773 return;
774
775 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
776 device->cdev->id);
777 result = sysfs_create_link(&device->dev->dev.kobj,
778 &device->cdev->device.kobj,
779 "thermal_cooling");
780 if (result)
781 printk(KERN_ERR PREFIX "Create sysfs link\n");
782 result = sysfs_create_link(&device->cdev->device.kobj,
783 &device->dev->dev.kobj, "device");
784 if (result)
785 printk(KERN_ERR PREFIX "Create sysfs link\n");
786
787 }
788
789 if (acpi_video_display_switch_support()) {
790
791 if (device->cap._DCS && device->cap._DSS) {
792 static int count;
793 char *name;
794 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
795 if (!name)
796 return;
797 sprintf(name, "acpi_video%d", count++);
798 device->output_dev = video_output_register(name,
799 NULL, device, &acpi_output_properties);
800 kfree(name);
801 }
802 }
803 }
804
805 /*
806 * Arg:
807 * device : video output device (VGA)
808 *
809 * Return Value:
810 * None
811 *
812 * Find out all required AML methods defined under the video bus device.
813 */
814
815 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
816 {
817 acpi_handle h_dummy1;
818
819 memset(&video->cap, 0, sizeof(video->cap));
820 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
821 video->cap._DOS = 1;
822 }
823 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
824 video->cap._DOD = 1;
825 }
826 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
827 video->cap._ROM = 1;
828 }
829 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
830 video->cap._GPD = 1;
831 }
832 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
833 video->cap._SPD = 1;
834 }
835 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
836 video->cap._VPO = 1;
837 }
838 }
839
840 /*
841 * Check whether the video bus device has required AML method to
842 * support the desired features
843 */
844
845 static int acpi_video_bus_check(struct acpi_video_bus *video)
846 {
847 acpi_status status = -ENOENT;
848 struct device *dev;
849
850 if (!video)
851 return -EINVAL;
852
853 dev = acpi_get_physical_pci_device(video->device->handle);
854 if (!dev)
855 return -ENODEV;
856 put_device(dev);
857
858 /* Since there is no HID, CID and so on for VGA driver, we have
859 * to check well known required nodes.
860 */
861
862 /* Does this device support video switching? */
863 if (video->cap._DOS) {
864 video->flags.multihead = 1;
865 status = 0;
866 }
867
868 /* Does this device support retrieving a video ROM? */
869 if (video->cap._ROM) {
870 video->flags.rom = 1;
871 status = 0;
872 }
873
874 /* Does this device support configuring which video device to POST? */
875 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
876 video->flags.post = 1;
877 status = 0;
878 }
879
880 return status;
881 }
882
883 /* --------------------------------------------------------------------------
884 FS Interface (/proc)
885 -------------------------------------------------------------------------- */
886
887 static struct proc_dir_entry *acpi_video_dir;
888
889 /* video devices */
890
891 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
892 {
893 struct acpi_video_device *dev = seq->private;
894
895
896 if (!dev)
897 goto end;
898
899 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
900 seq_printf(seq, "type: ");
901 if (dev->flags.crt)
902 seq_printf(seq, "CRT\n");
903 else if (dev->flags.lcd)
904 seq_printf(seq, "LCD\n");
905 else if (dev->flags.tvout)
906 seq_printf(seq, "TVOUT\n");
907 else if (dev->flags.dvi)
908 seq_printf(seq, "DVI\n");
909 else
910 seq_printf(seq, "UNKNOWN\n");
911
912 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
913
914 end:
915 return 0;
916 }
917
918 static int
919 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
920 {
921 return single_open(file, acpi_video_device_info_seq_show,
922 PDE(inode)->data);
923 }
924
925 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
926 {
927 int status;
928 struct acpi_video_device *dev = seq->private;
929 unsigned long long state;
930
931
932 if (!dev)
933 goto end;
934
935 status = acpi_video_device_get_state(dev, &state);
936 seq_printf(seq, "state: ");
937 if (ACPI_SUCCESS(status))
938 seq_printf(seq, "0x%02llx\n", state);
939 else
940 seq_printf(seq, "<not supported>\n");
941
942 status = acpi_video_device_query(dev, &state);
943 seq_printf(seq, "query: ");
944 if (ACPI_SUCCESS(status))
945 seq_printf(seq, "0x%02llx\n", state);
946 else
947 seq_printf(seq, "<not supported>\n");
948
949 end:
950 return 0;
951 }
952
953 static int
954 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
955 {
956 return single_open(file, acpi_video_device_state_seq_show,
957 PDE(inode)->data);
958 }
959
960 static ssize_t
961 acpi_video_device_write_state(struct file *file,
962 const char __user * buffer,
963 size_t count, loff_t * data)
964 {
965 int status;
966 struct seq_file *m = file->private_data;
967 struct acpi_video_device *dev = m->private;
968 char str[12] = { 0 };
969 u32 state = 0;
970
971
972 if (!dev || count + 1 > sizeof str)
973 return -EINVAL;
974
975 if (copy_from_user(str, buffer, count))
976 return -EFAULT;
977
978 str[count] = 0;
979 state = simple_strtoul(str, NULL, 0);
980 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
981
982 status = acpi_video_device_set_state(dev, state);
983
984 if (status)
985 return -EFAULT;
986
987 return count;
988 }
989
990 static int
991 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
992 {
993 struct acpi_video_device *dev = seq->private;
994 int i;
995
996
997 if (!dev || !dev->brightness) {
998 seq_printf(seq, "<not supported>\n");
999 return 0;
1000 }
1001
1002 seq_printf(seq, "levels: ");
1003 for (i = 0; i < dev->brightness->count; i++)
1004 seq_printf(seq, " %d", dev->brightness->levels[i]);
1005 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1006
1007 return 0;
1008 }
1009
1010 static int
1011 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1012 {
1013 return single_open(file, acpi_video_device_brightness_seq_show,
1014 PDE(inode)->data);
1015 }
1016
1017 static ssize_t
1018 acpi_video_device_write_brightness(struct file *file,
1019 const char __user * buffer,
1020 size_t count, loff_t * data)
1021 {
1022 struct seq_file *m = file->private_data;
1023 struct acpi_video_device *dev = m->private;
1024 char str[5] = { 0 };
1025 unsigned int level = 0;
1026 int i;
1027
1028
1029 if (!dev || !dev->brightness || count + 1 > sizeof str)
1030 return -EINVAL;
1031
1032 if (copy_from_user(str, buffer, count))
1033 return -EFAULT;
1034
1035 str[count] = 0;
1036 level = simple_strtoul(str, NULL, 0);
1037
1038 if (level > 100)
1039 return -EFAULT;
1040
1041 /* validate through the list of available levels */
1042 for (i = 0; i < dev->brightness->count; i++)
1043 if (level == dev->brightness->levels[i]) {
1044 if (ACPI_SUCCESS
1045 (acpi_video_device_lcd_set_level(dev, level)))
1046 dev->brightness->curr = level;
1047 break;
1048 }
1049
1050 return count;
1051 }
1052
1053 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1054 {
1055 struct acpi_video_device *dev = seq->private;
1056 int status;
1057 int i;
1058 union acpi_object *edid = NULL;
1059
1060
1061 if (!dev)
1062 goto out;
1063
1064 status = acpi_video_device_EDID(dev, &edid, 128);
1065 if (ACPI_FAILURE(status)) {
1066 status = acpi_video_device_EDID(dev, &edid, 256);
1067 }
1068
1069 if (ACPI_FAILURE(status)) {
1070 goto out;
1071 }
1072
1073 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1074 for (i = 0; i < edid->buffer.length; i++)
1075 seq_putc(seq, edid->buffer.pointer[i]);
1076 }
1077
1078 out:
1079 if (!edid)
1080 seq_printf(seq, "<not supported>\n");
1081 else
1082 kfree(edid);
1083
1084 return 0;
1085 }
1086
1087 static int
1088 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1089 {
1090 return single_open(file, acpi_video_device_EDID_seq_show,
1091 PDE(inode)->data);
1092 }
1093
1094 static int acpi_video_device_add_fs(struct acpi_device *device)
1095 {
1096 struct proc_dir_entry *entry, *device_dir;
1097 struct acpi_video_device *vid_dev;
1098
1099 vid_dev = acpi_driver_data(device);
1100 if (!vid_dev)
1101 return -ENODEV;
1102
1103 device_dir = proc_mkdir(acpi_device_bid(device),
1104 vid_dev->video->dir);
1105 if (!device_dir)
1106 return -ENOMEM;
1107
1108 device_dir->owner = THIS_MODULE;
1109
1110 /* 'info' [R] */
1111 entry = proc_create_data("info", S_IRUGO, device_dir,
1112 &acpi_video_device_info_fops, acpi_driver_data(device));
1113 if (!entry)
1114 goto err_remove_dir;
1115
1116 /* 'state' [R/W] */
1117 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1118 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1119 device_dir,
1120 &acpi_video_device_state_fops,
1121 acpi_driver_data(device));
1122 if (!entry)
1123 goto err_remove_info;
1124
1125 /* 'brightness' [R/W] */
1126 acpi_video_device_brightness_fops.write =
1127 acpi_video_device_write_brightness;
1128 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1129 device_dir,
1130 &acpi_video_device_brightness_fops,
1131 acpi_driver_data(device));
1132 if (!entry)
1133 goto err_remove_state;
1134
1135 /* 'EDID' [R] */
1136 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1137 &acpi_video_device_EDID_fops,
1138 acpi_driver_data(device));
1139 if (!entry)
1140 goto err_remove_brightness;
1141
1142 acpi_device_dir(device) = device_dir;
1143
1144 return 0;
1145
1146 err_remove_brightness:
1147 remove_proc_entry("brightness", device_dir);
1148 err_remove_state:
1149 remove_proc_entry("state", device_dir);
1150 err_remove_info:
1151 remove_proc_entry("info", device_dir);
1152 err_remove_dir:
1153 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1154 return -ENOMEM;
1155 }
1156
1157 static int acpi_video_device_remove_fs(struct acpi_device *device)
1158 {
1159 struct acpi_video_device *vid_dev;
1160 struct proc_dir_entry *device_dir;
1161
1162 vid_dev = acpi_driver_data(device);
1163 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1164 return -ENODEV;
1165
1166 device_dir = acpi_device_dir(device);
1167 if (device_dir) {
1168 remove_proc_entry("info", device_dir);
1169 remove_proc_entry("state", device_dir);
1170 remove_proc_entry("brightness", device_dir);
1171 remove_proc_entry("EDID", device_dir);
1172 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1173 acpi_device_dir(device) = NULL;
1174 }
1175
1176 return 0;
1177 }
1178
1179 /* video bus */
1180 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1181 {
1182 struct acpi_video_bus *video = seq->private;
1183
1184
1185 if (!video)
1186 goto end;
1187
1188 seq_printf(seq, "Switching heads: %s\n",
1189 video->flags.multihead ? "yes" : "no");
1190 seq_printf(seq, "Video ROM: %s\n",
1191 video->flags.rom ? "yes" : "no");
1192 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1193 video->flags.post ? "yes" : "no");
1194
1195 end:
1196 return 0;
1197 }
1198
1199 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1200 {
1201 return single_open(file, acpi_video_bus_info_seq_show,
1202 PDE(inode)->data);
1203 }
1204
1205 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1206 {
1207 struct acpi_video_bus *video = seq->private;
1208
1209
1210 if (!video)
1211 goto end;
1212
1213 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1214 seq_printf(seq, "<TODO>\n");
1215
1216 end:
1217 return 0;
1218 }
1219
1220 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1221 {
1222 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1223 }
1224
1225 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1226 {
1227 struct acpi_video_bus *video = seq->private;
1228 unsigned long long options;
1229 int status;
1230
1231
1232 if (!video)
1233 goto end;
1234
1235 status = acpi_video_bus_POST_options(video, &options);
1236 if (ACPI_SUCCESS(status)) {
1237 if (!(options & 1)) {
1238 printk(KERN_WARNING PREFIX
1239 "The motherboard VGA device is not listed as a possible POST device.\n");
1240 printk(KERN_WARNING PREFIX
1241 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1242 }
1243 printk("%llx\n", options);
1244 seq_printf(seq, "can POST: <integrated video>");
1245 if (options & 2)
1246 seq_printf(seq, " <PCI video>");
1247 if (options & 4)
1248 seq_printf(seq, " <AGP video>");
1249 seq_putc(seq, '\n');
1250 } else
1251 seq_printf(seq, "<not supported>\n");
1252 end:
1253 return 0;
1254 }
1255
1256 static int
1257 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1258 {
1259 return single_open(file, acpi_video_bus_POST_info_seq_show,
1260 PDE(inode)->data);
1261 }
1262
1263 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1264 {
1265 struct acpi_video_bus *video = seq->private;
1266 int status;
1267 unsigned long long id;
1268
1269
1270 if (!video)
1271 goto end;
1272
1273 status = acpi_video_bus_get_POST(video, &id);
1274 if (!ACPI_SUCCESS(status)) {
1275 seq_printf(seq, "<not supported>\n");
1276 goto end;
1277 }
1278 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1279
1280 end:
1281 return 0;
1282 }
1283
1284 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1285 {
1286 struct acpi_video_bus *video = seq->private;
1287
1288
1289 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1290
1291 return 0;
1292 }
1293
1294 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1295 {
1296 return single_open(file, acpi_video_bus_POST_seq_show,
1297 PDE(inode)->data);
1298 }
1299
1300 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1301 {
1302 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1303 }
1304
1305 static ssize_t
1306 acpi_video_bus_write_POST(struct file *file,
1307 const char __user * buffer,
1308 size_t count, loff_t * data)
1309 {
1310 int status;
1311 struct seq_file *m = file->private_data;
1312 struct acpi_video_bus *video = m->private;
1313 char str[12] = { 0 };
1314 unsigned long long opt, options;
1315
1316
1317 if (!video || count + 1 > sizeof str)
1318 return -EINVAL;
1319
1320 status = acpi_video_bus_POST_options(video, &options);
1321 if (!ACPI_SUCCESS(status))
1322 return -EINVAL;
1323
1324 if (copy_from_user(str, buffer, count))
1325 return -EFAULT;
1326
1327 str[count] = 0;
1328 opt = strtoul(str, NULL, 0);
1329 if (opt > 3)
1330 return -EFAULT;
1331
1332 /* just in case an OEM 'forgot' the motherboard... */
1333 options |= 1;
1334
1335 if (options & (1ul << opt)) {
1336 status = acpi_video_bus_set_POST(video, opt);
1337 if (!ACPI_SUCCESS(status))
1338 return -EFAULT;
1339
1340 }
1341
1342 return count;
1343 }
1344
1345 static ssize_t
1346 acpi_video_bus_write_DOS(struct file *file,
1347 const char __user * buffer,
1348 size_t count, loff_t * data)
1349 {
1350 int status;
1351 struct seq_file *m = file->private_data;
1352 struct acpi_video_bus *video = m->private;
1353 char str[12] = { 0 };
1354 unsigned long opt;
1355
1356
1357 if (!video || count + 1 > sizeof str)
1358 return -EINVAL;
1359
1360 if (copy_from_user(str, buffer, count))
1361 return -EFAULT;
1362
1363 str[count] = 0;
1364 opt = strtoul(str, NULL, 0);
1365 if (opt > 7)
1366 return -EFAULT;
1367
1368 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1369
1370 if (!ACPI_SUCCESS(status))
1371 return -EFAULT;
1372
1373 return count;
1374 }
1375
1376 static int acpi_video_bus_add_fs(struct acpi_device *device)
1377 {
1378 struct acpi_video_bus *video = acpi_driver_data(device);
1379 struct proc_dir_entry *device_dir;
1380 struct proc_dir_entry *entry;
1381
1382 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1383 if (!device_dir)
1384 return -ENOMEM;
1385
1386 device_dir->owner = THIS_MODULE;
1387
1388 /* 'info' [R] */
1389 entry = proc_create_data("info", S_IRUGO, device_dir,
1390 &acpi_video_bus_info_fops,
1391 acpi_driver_data(device));
1392 if (!entry)
1393 goto err_remove_dir;
1394
1395 /* 'ROM' [R] */
1396 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1397 &acpi_video_bus_ROM_fops,
1398 acpi_driver_data(device));
1399 if (!entry)
1400 goto err_remove_info;
1401
1402 /* 'POST_info' [R] */
1403 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1404 &acpi_video_bus_POST_info_fops,
1405 acpi_driver_data(device));
1406 if (!entry)
1407 goto err_remove_rom;
1408
1409 /* 'POST' [R/W] */
1410 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1411 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1412 device_dir,
1413 &acpi_video_bus_POST_fops,
1414 acpi_driver_data(device));
1415 if (!entry)
1416 goto err_remove_post_info;
1417
1418 /* 'DOS' [R/W] */
1419 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1420 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1421 device_dir,
1422 &acpi_video_bus_DOS_fops,
1423 acpi_driver_data(device));
1424 if (!entry)
1425 goto err_remove_post;
1426
1427 video->dir = acpi_device_dir(device) = device_dir;
1428 return 0;
1429
1430 err_remove_post:
1431 remove_proc_entry("POST", device_dir);
1432 err_remove_post_info:
1433 remove_proc_entry("POST_info", device_dir);
1434 err_remove_rom:
1435 remove_proc_entry("ROM", device_dir);
1436 err_remove_info:
1437 remove_proc_entry("info", device_dir);
1438 err_remove_dir:
1439 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1440 return -ENOMEM;
1441 }
1442
1443 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1444 {
1445 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1446
1447 if (device_dir) {
1448 remove_proc_entry("info", device_dir);
1449 remove_proc_entry("ROM", device_dir);
1450 remove_proc_entry("POST_info", device_dir);
1451 remove_proc_entry("POST", device_dir);
1452 remove_proc_entry("DOS", device_dir);
1453 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1454 acpi_device_dir(device) = NULL;
1455 }
1456
1457 return 0;
1458 }
1459
1460 /* --------------------------------------------------------------------------
1461 Driver Interface
1462 -------------------------------------------------------------------------- */
1463
1464 /* device interface */
1465 static struct acpi_video_device_attrib*
1466 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1467 {
1468 struct acpi_video_enumerated_device *ids;
1469 int i;
1470
1471 for (i = 0; i < video->attached_count; i++) {
1472 ids = &video->attached_array[i];
1473 if ((ids->value.int_val & 0xffff) == device_id)
1474 return &ids->value.attrib;
1475 }
1476
1477 return NULL;
1478 }
1479
1480 static int
1481 acpi_video_bus_get_one_device(struct acpi_device *device,
1482 struct acpi_video_bus *video)
1483 {
1484 unsigned long long device_id;
1485 int status;
1486 struct acpi_video_device *data;
1487 struct acpi_video_device_attrib* attribute;
1488
1489 if (!device || !video)
1490 return -EINVAL;
1491
1492 status =
1493 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1494 if (ACPI_SUCCESS(status)) {
1495
1496 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1497 if (!data)
1498 return -ENOMEM;
1499
1500 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1501 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1502 device->driver_data = data;
1503
1504 data->device_id = device_id;
1505 data->video = video;
1506 data->dev = device;
1507
1508 attribute = acpi_video_get_device_attr(video, device_id);
1509
1510 if((attribute != NULL) && attribute->device_id_scheme) {
1511 switch (attribute->display_type) {
1512 case ACPI_VIDEO_DISPLAY_CRT:
1513 data->flags.crt = 1;
1514 break;
1515 case ACPI_VIDEO_DISPLAY_TV:
1516 data->flags.tvout = 1;
1517 break;
1518 case ACPI_VIDEO_DISPLAY_DVI:
1519 data->flags.dvi = 1;
1520 break;
1521 case ACPI_VIDEO_DISPLAY_LCD:
1522 data->flags.lcd = 1;
1523 break;
1524 default:
1525 data->flags.unknown = 1;
1526 break;
1527 }
1528 if(attribute->bios_can_detect)
1529 data->flags.bios = 1;
1530 } else
1531 data->flags.unknown = 1;
1532
1533 acpi_video_device_bind(video, data);
1534 acpi_video_device_find_cap(data);
1535
1536 status = acpi_install_notify_handler(device->handle,
1537 ACPI_DEVICE_NOTIFY,
1538 acpi_video_device_notify,
1539 data);
1540 if (ACPI_FAILURE(status)) {
1541 printk(KERN_ERR PREFIX
1542 "Error installing notify handler\n");
1543 if(data->brightness)
1544 kfree(data->brightness->levels);
1545 kfree(data->brightness);
1546 kfree(data);
1547 return -ENODEV;
1548 }
1549
1550 mutex_lock(&video->device_list_lock);
1551 list_add_tail(&data->entry, &video->video_device_list);
1552 mutex_unlock(&video->device_list_lock);
1553
1554 acpi_video_device_add_fs(device);
1555
1556 return 0;
1557 }
1558
1559 return -ENOENT;
1560 }
1561
1562 /*
1563 * Arg:
1564 * video : video bus device
1565 *
1566 * Return:
1567 * none
1568 *
1569 * Enumerate the video device list of the video bus,
1570 * bind the ids with the corresponding video devices
1571 * under the video bus.
1572 */
1573
1574 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1575 {
1576 struct acpi_video_device *dev;
1577
1578 mutex_lock(&video->device_list_lock);
1579
1580 list_for_each_entry(dev, &video->video_device_list, entry)
1581 acpi_video_device_bind(video, dev);
1582
1583 mutex_unlock(&video->device_list_lock);
1584 }
1585
1586 /*
1587 * Arg:
1588 * video : video bus device
1589 * device : video output device under the video
1590 * bus
1591 *
1592 * Return:
1593 * none
1594 *
1595 * Bind the ids with the corresponding video devices
1596 * under the video bus.
1597 */
1598
1599 static void
1600 acpi_video_device_bind(struct acpi_video_bus *video,
1601 struct acpi_video_device *device)
1602 {
1603 struct acpi_video_enumerated_device *ids;
1604 int i;
1605
1606 for (i = 0; i < video->attached_count; i++) {
1607 ids = &video->attached_array[i];
1608 if (device->device_id == (ids->value.int_val & 0xffff)) {
1609 ids->bind_info = device;
1610 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1611 }
1612 }
1613 }
1614
1615 /*
1616 * Arg:
1617 * video : video bus device
1618 *
1619 * Return:
1620 * < 0 : error
1621 *
1622 * Call _DOD to enumerate all devices attached to display adapter
1623 *
1624 */
1625
1626 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1627 {
1628 int status;
1629 int count;
1630 int i;
1631 struct acpi_video_enumerated_device *active_list;
1632 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1633 union acpi_object *dod = NULL;
1634 union acpi_object *obj;
1635
1636 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1637 if (!ACPI_SUCCESS(status)) {
1638 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1639 return status;
1640 }
1641
1642 dod = buffer.pointer;
1643 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1644 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1645 status = -EFAULT;
1646 goto out;
1647 }
1648
1649 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1650 dod->package.count));
1651
1652 active_list = kcalloc(1 + dod->package.count,
1653 sizeof(struct acpi_video_enumerated_device),
1654 GFP_KERNEL);
1655 if (!active_list) {
1656 status = -ENOMEM;
1657 goto out;
1658 }
1659
1660 count = 0;
1661 for (i = 0; i < dod->package.count; i++) {
1662 obj = &dod->package.elements[i];
1663
1664 if (obj->type != ACPI_TYPE_INTEGER) {
1665 printk(KERN_ERR PREFIX
1666 "Invalid _DOD data in element %d\n", i);
1667 continue;
1668 }
1669
1670 active_list[count].value.int_val = obj->integer.value;
1671 active_list[count].bind_info = NULL;
1672 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1673 (int)obj->integer.value));
1674 count++;
1675 }
1676
1677 kfree(video->attached_array);
1678
1679 video->attached_array = active_list;
1680 video->attached_count = count;
1681
1682 out:
1683 kfree(buffer.pointer);
1684 return status;
1685 }
1686
1687 static int
1688 acpi_video_get_next_level(struct acpi_video_device *device,
1689 u32 level_current, u32 event)
1690 {
1691 int min, max, min_above, max_below, i, l, delta = 255;
1692 max = max_below = 0;
1693 min = min_above = 255;
1694 /* Find closest level to level_current */
1695 for (i = 0; i < device->brightness->count; i++) {
1696 l = device->brightness->levels[i];
1697 if (abs(l - level_current) < abs(delta)) {
1698 delta = l - level_current;
1699 if (!delta)
1700 break;
1701 }
1702 }
1703 /* Ajust level_current to closest available level */
1704 level_current += delta;
1705 for (i = 0; i < device->brightness->count; i++) {
1706 l = device->brightness->levels[i];
1707 if (l < min)
1708 min = l;
1709 if (l > max)
1710 max = l;
1711 if (l < min_above && l > level_current)
1712 min_above = l;
1713 if (l > max_below && l < level_current)
1714 max_below = l;
1715 }
1716
1717 switch (event) {
1718 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1719 return (level_current < max) ? min_above : min;
1720 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1721 return (level_current < max) ? min_above : max;
1722 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1723 return (level_current > min) ? max_below : min;
1724 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1725 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1726 return 0;
1727 default:
1728 return level_current;
1729 }
1730 }
1731
1732 static void
1733 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1734 {
1735 unsigned long long level_current, level_next;
1736 if (!device->brightness)
1737 return;
1738 acpi_video_device_lcd_get_level_current(device, &level_current);
1739 level_next = acpi_video_get_next_level(device, level_current, event);
1740 acpi_video_device_lcd_set_level(device, level_next);
1741 }
1742
1743 static int
1744 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1745 struct acpi_device *device)
1746 {
1747 int status = 0;
1748 struct acpi_device *dev;
1749
1750 acpi_video_device_enumerate(video);
1751
1752 list_for_each_entry(dev, &device->children, node) {
1753
1754 status = acpi_video_bus_get_one_device(dev, video);
1755 if (ACPI_FAILURE(status)) {
1756 printk(KERN_WARNING PREFIX
1757 "Cant attach device");
1758 continue;
1759 }
1760 }
1761 return status;
1762 }
1763
1764 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1765 {
1766 acpi_status status;
1767 struct acpi_video_bus *video;
1768
1769
1770 if (!device || !device->video)
1771 return -ENOENT;
1772
1773 video = device->video;
1774
1775 acpi_video_device_remove_fs(device->dev);
1776
1777 status = acpi_remove_notify_handler(device->dev->handle,
1778 ACPI_DEVICE_NOTIFY,
1779 acpi_video_device_notify);
1780 backlight_device_unregister(device->backlight);
1781 if (device->cdev) {
1782 sysfs_remove_link(&device->dev->dev.kobj,
1783 "thermal_cooling");
1784 sysfs_remove_link(&device->cdev->device.kobj,
1785 "device");
1786 thermal_cooling_device_unregister(device->cdev);
1787 device->cdev = NULL;
1788 }
1789 video_output_unregister(device->output_dev);
1790
1791 return 0;
1792 }
1793
1794 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1795 {
1796 int status;
1797 struct acpi_video_device *dev, *next;
1798
1799 mutex_lock(&video->device_list_lock);
1800
1801 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1802
1803 status = acpi_video_bus_put_one_device(dev);
1804 if (ACPI_FAILURE(status))
1805 printk(KERN_WARNING PREFIX
1806 "hhuuhhuu bug in acpi video driver.\n");
1807
1808 if (dev->brightness) {
1809 kfree(dev->brightness->levels);
1810 kfree(dev->brightness);
1811 }
1812 list_del(&dev->entry);
1813 kfree(dev);
1814 }
1815
1816 mutex_unlock(&video->device_list_lock);
1817
1818 return 0;
1819 }
1820
1821 /* acpi_video interface */
1822
1823 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1824 {
1825 return acpi_video_bus_DOS(video, 0, 0);
1826 }
1827
1828 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1829 {
1830 return acpi_video_bus_DOS(video, 0, 1);
1831 }
1832
1833 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1834 {
1835 struct acpi_video_bus *video = data;
1836 struct acpi_device *device = NULL;
1837 struct input_dev *input;
1838 int keycode;
1839
1840 if (!video)
1841 return;
1842
1843 device = video->device;
1844 input = video->input;
1845
1846 switch (event) {
1847 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1848 * most likely via hotkey. */
1849 acpi_bus_generate_proc_event(device, event, 0);
1850 keycode = KEY_SWITCHVIDEOMODE;
1851 break;
1852
1853 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1854 * connector. */
1855 acpi_video_device_enumerate(video);
1856 acpi_video_device_rebind(video);
1857 acpi_bus_generate_proc_event(device, event, 0);
1858 keycode = KEY_SWITCHVIDEOMODE;
1859 break;
1860
1861 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1862 acpi_bus_generate_proc_event(device, event, 0);
1863 keycode = KEY_SWITCHVIDEOMODE;
1864 break;
1865 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1866 acpi_bus_generate_proc_event(device, event, 0);
1867 keycode = KEY_VIDEO_NEXT;
1868 break;
1869 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1870 acpi_bus_generate_proc_event(device, event, 0);
1871 keycode = KEY_VIDEO_PREV;
1872 break;
1873
1874 default:
1875 keycode = KEY_UNKNOWN;
1876 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1877 "Unsupported event [0x%x]\n", event));
1878 break;
1879 }
1880
1881 acpi_notifier_call_chain(device, event, 0);
1882 input_report_key(input, keycode, 1);
1883 input_sync(input);
1884 input_report_key(input, keycode, 0);
1885 input_sync(input);
1886
1887 return;
1888 }
1889
1890 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1891 {
1892 struct acpi_video_device *video_device = data;
1893 struct acpi_device *device = NULL;
1894 struct acpi_video_bus *bus;
1895 struct input_dev *input;
1896 int keycode;
1897
1898 if (!video_device)
1899 return;
1900
1901 device = video_device->dev;
1902 bus = video_device->video;
1903 input = bus->input;
1904
1905 switch (event) {
1906 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1907 if (brightness_switch_enabled)
1908 acpi_video_switch_brightness(video_device, event);
1909 acpi_bus_generate_proc_event(device, event, 0);
1910 keycode = KEY_BRIGHTNESS_CYCLE;
1911 break;
1912 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1913 if (brightness_switch_enabled)
1914 acpi_video_switch_brightness(video_device, event);
1915 acpi_bus_generate_proc_event(device, event, 0);
1916 keycode = KEY_BRIGHTNESSUP;
1917 break;
1918 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1919 if (brightness_switch_enabled)
1920 acpi_video_switch_brightness(video_device, event);
1921 acpi_bus_generate_proc_event(device, event, 0);
1922 keycode = KEY_BRIGHTNESSDOWN;
1923 break;
1924 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1925 if (brightness_switch_enabled)
1926 acpi_video_switch_brightness(video_device, event);
1927 acpi_bus_generate_proc_event(device, event, 0);
1928 keycode = KEY_BRIGHTNESS_ZERO;
1929 break;
1930 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1931 if (brightness_switch_enabled)
1932 acpi_video_switch_brightness(video_device, event);
1933 acpi_bus_generate_proc_event(device, event, 0);
1934 keycode = KEY_DISPLAY_OFF;
1935 break;
1936 default:
1937 keycode = KEY_UNKNOWN;
1938 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1939 "Unsupported event [0x%x]\n", event));
1940 break;
1941 }
1942
1943 acpi_notifier_call_chain(device, event, 0);
1944 input_report_key(input, keycode, 1);
1945 input_sync(input);
1946 input_report_key(input, keycode, 0);
1947 input_sync(input);
1948
1949 return;
1950 }
1951
1952 static int instance;
1953 static int acpi_video_resume(struct acpi_device *device)
1954 {
1955 struct acpi_video_bus *video;
1956 struct acpi_video_device *video_device;
1957 int i;
1958
1959 if (!device || !acpi_driver_data(device))
1960 return -EINVAL;
1961
1962 video = acpi_driver_data(device);
1963
1964 for (i = 0; i < video->attached_count; i++) {
1965 video_device = video->attached_array[i].bind_info;
1966 if (video_device && video_device->backlight)
1967 acpi_video_set_brightness(video_device->backlight);
1968 }
1969 return AE_OK;
1970 }
1971
1972 static int acpi_video_bus_add(struct acpi_device *device)
1973 {
1974 acpi_status status;
1975 struct acpi_video_bus *video;
1976 struct input_dev *input;
1977 int error;
1978
1979 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1980 if (!video)
1981 return -ENOMEM;
1982
1983 /* a hack to fix the duplicate name "VID" problem on T61 */
1984 if (!strcmp(device->pnp.bus_id, "VID")) {
1985 if (instance)
1986 device->pnp.bus_id[3] = '0' + instance;
1987 instance ++;
1988 }
1989
1990 video->device = device;
1991 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1992 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1993 device->driver_data = video;
1994
1995 acpi_video_bus_find_cap(video);
1996 error = acpi_video_bus_check(video);
1997 if (error)
1998 goto err_free_video;
1999
2000 error = acpi_video_bus_add_fs(device);
2001 if (error)
2002 goto err_free_video;
2003
2004 mutex_init(&video->device_list_lock);
2005 INIT_LIST_HEAD(&video->video_device_list);
2006
2007 acpi_video_bus_get_devices(video, device);
2008 acpi_video_bus_start_devices(video);
2009
2010 status = acpi_install_notify_handler(device->handle,
2011 ACPI_DEVICE_NOTIFY,
2012 acpi_video_bus_notify, video);
2013 if (ACPI_FAILURE(status)) {
2014 printk(KERN_ERR PREFIX
2015 "Error installing notify handler\n");
2016 error = -ENODEV;
2017 goto err_stop_video;
2018 }
2019
2020 video->input = input = input_allocate_device();
2021 if (!input) {
2022 error = -ENOMEM;
2023 goto err_uninstall_notify;
2024 }
2025
2026 snprintf(video->phys, sizeof(video->phys),
2027 "%s/video/input0", acpi_device_hid(video->device));
2028
2029 input->name = acpi_device_name(video->device);
2030 input->phys = video->phys;
2031 input->id.bustype = BUS_HOST;
2032 input->id.product = 0x06;
2033 input->dev.parent = &device->dev;
2034 input->evbit[0] = BIT(EV_KEY);
2035 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2036 set_bit(KEY_VIDEO_NEXT, input->keybit);
2037 set_bit(KEY_VIDEO_PREV, input->keybit);
2038 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2039 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2040 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2041 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2042 set_bit(KEY_DISPLAY_OFF, input->keybit);
2043 set_bit(KEY_UNKNOWN, input->keybit);
2044
2045 error = input_register_device(input);
2046 if (error)
2047 goto err_free_input_dev;
2048
2049 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2050 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2051 video->flags.multihead ? "yes" : "no",
2052 video->flags.rom ? "yes" : "no",
2053 video->flags.post ? "yes" : "no");
2054
2055 return 0;
2056
2057 err_free_input_dev:
2058 input_free_device(input);
2059 err_uninstall_notify:
2060 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2061 acpi_video_bus_notify);
2062 err_stop_video:
2063 acpi_video_bus_stop_devices(video);
2064 acpi_video_bus_put_devices(video);
2065 kfree(video->attached_array);
2066 acpi_video_bus_remove_fs(device);
2067 err_free_video:
2068 kfree(video);
2069 device->driver_data = NULL;
2070
2071 return error;
2072 }
2073
2074 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2075 {
2076 acpi_status status = 0;
2077 struct acpi_video_bus *video = NULL;
2078
2079
2080 if (!device || !acpi_driver_data(device))
2081 return -EINVAL;
2082
2083 video = acpi_driver_data(device);
2084
2085 acpi_video_bus_stop_devices(video);
2086
2087 status = acpi_remove_notify_handler(video->device->handle,
2088 ACPI_DEVICE_NOTIFY,
2089 acpi_video_bus_notify);
2090
2091 acpi_video_bus_put_devices(video);
2092 acpi_video_bus_remove_fs(device);
2093
2094 input_unregister_device(video->input);
2095 kfree(video->attached_array);
2096 kfree(video);
2097
2098 return 0;
2099 }
2100
2101 static int __init acpi_video_init(void)
2102 {
2103 int result = 0;
2104
2105 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2106 if (!acpi_video_dir)
2107 return -ENODEV;
2108 acpi_video_dir->owner = THIS_MODULE;
2109
2110 result = acpi_bus_register_driver(&acpi_video_bus);
2111 if (result < 0) {
2112 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2113 return -ENODEV;
2114 }
2115
2116 return 0;
2117 }
2118
2119 static void __exit acpi_video_exit(void)
2120 {
2121
2122 acpi_bus_unregister_driver(&acpi_video_bus);
2123
2124 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2125
2126 return;
2127 }
2128
2129 module_init(acpi_video_init);
2130 module_exit(acpi_video_exit);
Support for the Chinese Samsung S3C2440 based development boards