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ACPI video: support _BQC/_BCL/_BCM methods that use index values
[deliverable/linux.git] / drivers / acpi / video.c
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/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 <linux/sort.h>
40 #include <asm/uaccess.h>
41
42 #include <acpi/acpi_bus.h>
43 #include <acpi/acpi_drivers.h>
44
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_brightness_flags {
172 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
173 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
174 u8 _BCL_use_index:1; /* levels in _BCL are index values */
175 u8 _BCM_use_index:1; /* input of _BCM is an index value */
176 u8 _BQC_use_index:1; /* _BQC returns an index value */
177 };
178
179 struct acpi_video_device_brightness {
180 int curr;
181 int count;
182 int *levels;
183 struct acpi_video_brightness_flags flags;
184 };
185
186 struct acpi_video_device {
187 unsigned long device_id;
188 struct acpi_video_device_flags flags;
189 struct acpi_video_device_cap cap;
190 struct list_head entry;
191 struct acpi_video_bus *video;
192 struct acpi_device *dev;
193 struct acpi_video_device_brightness *brightness;
194 struct backlight_device *backlight;
195 struct thermal_cooling_device *cdev;
196 struct output_device *output_dev;
197 };
198
199 /* bus */
200 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
201 static struct file_operations acpi_video_bus_info_fops = {
202 .owner = THIS_MODULE,
203 .open = acpi_video_bus_info_open_fs,
204 .read = seq_read,
205 .llseek = seq_lseek,
206 .release = single_release,
207 };
208
209 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
210 static struct file_operations acpi_video_bus_ROM_fops = {
211 .owner = THIS_MODULE,
212 .open = acpi_video_bus_ROM_open_fs,
213 .read = seq_read,
214 .llseek = seq_lseek,
215 .release = single_release,
216 };
217
218 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
219 struct file *file);
220 static struct file_operations acpi_video_bus_POST_info_fops = {
221 .owner = THIS_MODULE,
222 .open = acpi_video_bus_POST_info_open_fs,
223 .read = seq_read,
224 .llseek = seq_lseek,
225 .release = single_release,
226 };
227
228 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
229 static struct file_operations acpi_video_bus_POST_fops = {
230 .owner = THIS_MODULE,
231 .open = acpi_video_bus_POST_open_fs,
232 .read = seq_read,
233 .llseek = seq_lseek,
234 .release = single_release,
235 };
236
237 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
238 static struct file_operations acpi_video_bus_DOS_fops = {
239 .owner = THIS_MODULE,
240 .open = acpi_video_bus_DOS_open_fs,
241 .read = seq_read,
242 .llseek = seq_lseek,
243 .release = single_release,
244 };
245
246 /* device */
247 static int acpi_video_device_info_open_fs(struct inode *inode,
248 struct file *file);
249 static struct file_operations acpi_video_device_info_fops = {
250 .owner = THIS_MODULE,
251 .open = acpi_video_device_info_open_fs,
252 .read = seq_read,
253 .llseek = seq_lseek,
254 .release = single_release,
255 };
256
257 static int acpi_video_device_state_open_fs(struct inode *inode,
258 struct file *file);
259 static struct file_operations acpi_video_device_state_fops = {
260 .owner = THIS_MODULE,
261 .open = acpi_video_device_state_open_fs,
262 .read = seq_read,
263 .llseek = seq_lseek,
264 .release = single_release,
265 };
266
267 static int acpi_video_device_brightness_open_fs(struct inode *inode,
268 struct file *file);
269 static struct file_operations acpi_video_device_brightness_fops = {
270 .owner = THIS_MODULE,
271 .open = acpi_video_device_brightness_open_fs,
272 .read = seq_read,
273 .llseek = seq_lseek,
274 .release = single_release,
275 };
276
277 static int acpi_video_device_EDID_open_fs(struct inode *inode,
278 struct file *file);
279 static struct file_operations acpi_video_device_EDID_fops = {
280 .owner = THIS_MODULE,
281 .open = acpi_video_device_EDID_open_fs,
282 .read = seq_read,
283 .llseek = seq_lseek,
284 .release = single_release,
285 };
286
287 static char device_decode[][30] = {
288 "motherboard VGA device",
289 "PCI VGA device",
290 "AGP VGA device",
291 "UNKNOWN",
292 };
293
294 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
295 static void acpi_video_device_rebind(struct acpi_video_bus *video);
296 static void acpi_video_device_bind(struct acpi_video_bus *video,
297 struct acpi_video_device *device);
298 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
299 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
300 int level);
301 static int acpi_video_device_lcd_get_level_current(
302 struct acpi_video_device *device,
303 unsigned long long *level);
304 static int acpi_video_get_next_level(struct acpi_video_device *device,
305 u32 level_current, u32 event);
306 static int acpi_video_switch_brightness(struct acpi_video_device *device,
307 int event);
308 static int acpi_video_device_get_state(struct acpi_video_device *device,
309 unsigned long long *state);
310 static int acpi_video_output_get(struct output_device *od);
311 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
312
313 /*backlight device sysfs support*/
314 static int acpi_video_get_brightness(struct backlight_device *bd)
315 {
316 unsigned long long cur_level;
317 int i;
318 struct acpi_video_device *vd =
319 (struct acpi_video_device *)bl_get_data(bd);
320
321 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
322 return -EINVAL;
323 for (i = 2; i < vd->brightness->count; i++) {
324 if (vd->brightness->levels[i] == cur_level)
325 /* The first two entries are special - see page 575
326 of the ACPI spec 3.0 */
327 return i-2;
328 }
329 return 0;
330 }
331
332 static int acpi_video_set_brightness(struct backlight_device *bd)
333 {
334 int request_level = bd->props.brightness + 2;
335 struct acpi_video_device *vd =
336 (struct acpi_video_device *)bl_get_data(bd);
337
338 return acpi_video_device_lcd_set_level(vd,
339 vd->brightness->levels[request_level]);
340 }
341
342 static struct backlight_ops acpi_backlight_ops = {
343 .get_brightness = acpi_video_get_brightness,
344 .update_status = acpi_video_set_brightness,
345 };
346
347 /*video output device sysfs support*/
348 static int acpi_video_output_get(struct output_device *od)
349 {
350 unsigned long long state;
351 struct acpi_video_device *vd =
352 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
353 acpi_video_device_get_state(vd, &state);
354 return (int)state;
355 }
356
357 static int acpi_video_output_set(struct output_device *od)
358 {
359 unsigned long state = od->request_state;
360 struct acpi_video_device *vd=
361 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
362 return acpi_video_device_set_state(vd, state);
363 }
364
365 static struct output_properties acpi_output_properties = {
366 .set_state = acpi_video_output_set,
367 .get_status = acpi_video_output_get,
368 };
369
370
371 /* thermal cooling device callbacks */
372 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
373 {
374 struct acpi_device *device = cdev->devdata;
375 struct acpi_video_device *video = acpi_driver_data(device);
376
377 return sprintf(buf, "%d\n", video->brightness->count - 3);
378 }
379
380 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
381 {
382 struct acpi_device *device = cdev->devdata;
383 struct acpi_video_device *video = acpi_driver_data(device);
384 unsigned long long level;
385 int state;
386
387 if (acpi_video_device_lcd_get_level_current(video, &level))
388 return -EINVAL;
389 for (state = 2; state < video->brightness->count; state++)
390 if (level == video->brightness->levels[state])
391 return sprintf(buf, "%d\n",
392 video->brightness->count - state - 1);
393
394 return -EINVAL;
395 }
396
397 static int
398 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
399 {
400 struct acpi_device *device = cdev->devdata;
401 struct acpi_video_device *video = acpi_driver_data(device);
402 int level;
403
404 if ( state >= video->brightness->count - 2)
405 return -EINVAL;
406
407 state = video->brightness->count - state;
408 level = video->brightness->levels[state -1];
409 return acpi_video_device_lcd_set_level(video, level);
410 }
411
412 static struct thermal_cooling_device_ops video_cooling_ops = {
413 .get_max_state = video_get_max_state,
414 .get_cur_state = video_get_cur_state,
415 .set_cur_state = video_set_cur_state,
416 };
417
418 /* --------------------------------------------------------------------------
419 Video Management
420 -------------------------------------------------------------------------- */
421
422 /* device */
423
424 static int
425 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
426 {
427 int status;
428
429 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
430
431 return status;
432 }
433
434 static int
435 acpi_video_device_get_state(struct acpi_video_device *device,
436 unsigned long long *state)
437 {
438 int status;
439
440 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
441
442 return status;
443 }
444
445 static int
446 acpi_video_device_set_state(struct acpi_video_device *device, int state)
447 {
448 int status;
449 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
450 struct acpi_object_list args = { 1, &arg0 };
451 unsigned long long ret;
452
453
454 arg0.integer.value = state;
455 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
456
457 return status;
458 }
459
460 static int
461 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
462 union acpi_object **levels)
463 {
464 int status;
465 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
466 union acpi_object *obj;
467
468
469 *levels = NULL;
470
471 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
472 if (!ACPI_SUCCESS(status))
473 return status;
474 obj = (union acpi_object *)buffer.pointer;
475 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
476 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
477 status = -EFAULT;
478 goto err;
479 }
480
481 *levels = obj;
482
483 return 0;
484
485 err:
486 kfree(buffer.pointer);
487
488 return status;
489 }
490
491 static int
492 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
493 {
494 int status;
495 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
496 struct acpi_object_list args = { 1, &arg0 };
497 int state;
498
499 arg0.integer.value = level;
500
501 status = acpi_evaluate_object(device->dev->handle, "_BCM",
502 &args, NULL);
503 if (ACPI_FAILURE(status)) {
504 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
505 return -EIO;
506 }
507
508 device->brightness->curr = level;
509 for (state = 2; state < device->brightness->count; state++)
510 if (level == device->brightness->levels[state]) {
511 if (device->backlight)
512 device->backlight->props.brightness = state - 2;
513 return 0;
514 }
515
516 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
517 return -EINVAL;
518 }
519
520 static int
521 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
522 unsigned long long *level)
523 {
524 acpi_status status = AE_OK;
525
526 if (device->cap._BQC) {
527 status = acpi_evaluate_integer(device->dev->handle, "_BQC",
528 NULL, level);
529 if (ACPI_SUCCESS(status)) {
530 if (device->brightness->flags._BQC_use_index) {
531 if (device->brightness->flags._BCL_reversed)
532 *level = device->brightness->count
533 - 3 - (*level);
534 *level = device->brightness->levels[*level + 2];
535
536 }
537 device->brightness->curr = *level;
538 return 0;
539 } else {
540 /* Fixme:
541 * should we return an error or ignore this failure?
542 * dev->brightness->curr is a cached value which stores
543 * the correct current backlight level in most cases.
544 * ACPI video backlight still works w/ buggy _BQC.
545 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
546 */
547 ACPI_WARNING((AE_INFO, "Evaluating _BQC failed"));
548 device->cap._BQC = 0;
549 }
550 }
551
552 *level = device->brightness->curr;
553 return 0;
554 }
555
556 static int
557 acpi_video_device_EDID(struct acpi_video_device *device,
558 union acpi_object **edid, ssize_t length)
559 {
560 int status;
561 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
562 union acpi_object *obj;
563 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
564 struct acpi_object_list args = { 1, &arg0 };
565
566
567 *edid = NULL;
568
569 if (!device)
570 return -ENODEV;
571 if (length == 128)
572 arg0.integer.value = 1;
573 else if (length == 256)
574 arg0.integer.value = 2;
575 else
576 return -EINVAL;
577
578 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
579 if (ACPI_FAILURE(status))
580 return -ENODEV;
581
582 obj = buffer.pointer;
583
584 if (obj && obj->type == ACPI_TYPE_BUFFER)
585 *edid = obj;
586 else {
587 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
588 status = -EFAULT;
589 kfree(obj);
590 }
591
592 return status;
593 }
594
595 /* bus */
596
597 static int
598 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
599 {
600 int status;
601 unsigned long long tmp;
602 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
603 struct acpi_object_list args = { 1, &arg0 };
604
605
606 arg0.integer.value = option;
607
608 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
609 if (ACPI_SUCCESS(status))
610 status = tmp ? (-EINVAL) : (AE_OK);
611
612 return status;
613 }
614
615 static int
616 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
617 {
618 int status;
619
620 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
621
622 return status;
623 }
624
625 static int
626 acpi_video_bus_POST_options(struct acpi_video_bus *video,
627 unsigned long long *options)
628 {
629 int status;
630
631 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
632 *options &= 3;
633
634 return status;
635 }
636
637 /*
638 * Arg:
639 * video : video bus device pointer
640 * bios_flag :
641 * 0. The system BIOS should NOT automatically switch(toggle)
642 * the active display output.
643 * 1. The system BIOS should automatically switch (toggle) the
644 * active display output. No switch event.
645 * 2. The _DGS value should be locked.
646 * 3. The system BIOS should not automatically switch (toggle) the
647 * active display output, but instead generate the display switch
648 * event notify code.
649 * lcd_flag :
650 * 0. The system BIOS should automatically control the brightness level
651 * of the LCD when the power changes from AC to DC
652 * 1. The system BIOS should NOT automatically control the brightness
653 * level of the LCD when the power changes from AC to DC.
654 * Return Value:
655 * -1 wrong arg.
656 */
657
658 static int
659 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
660 {
661 acpi_integer status = 0;
662 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
663 struct acpi_object_list args = { 1, &arg0 };
664
665
666 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
667 status = -1;
668 goto Failed;
669 }
670 arg0.integer.value = (lcd_flag << 2) | bios_flag;
671 video->dos_setting = arg0.integer.value;
672 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
673
674 Failed:
675 return status;
676 }
677
678 /*
679 * Simple comparison function used to sort backlight levels.
680 */
681
682 static int
683 acpi_video_cmp_level(const void *a, const void *b)
684 {
685 return *(int *)a - *(int *)b;
686 }
687
688 /*
689 * Arg:
690 * device : video output device (LCD, CRT, ..)
691 *
692 * Return Value:
693 * Maximum brightness level
694 *
695 * Allocate and initialize device->brightness.
696 */
697
698 static int
699 acpi_video_init_brightness(struct acpi_video_device *device)
700 {
701 union acpi_object *obj = NULL;
702 int i, max_level = 0, count = 0, level_ac_battery = 0;
703 unsigned long long level, level_old;
704 union acpi_object *o;
705 struct acpi_video_device_brightness *br = NULL;
706 int result = -EINVAL;
707
708 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
709 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
710 "LCD brightness level\n"));
711 goto out;
712 }
713
714 if (obj->package.count < 2)
715 goto out;
716
717 br = kzalloc(sizeof(*br), GFP_KERNEL);
718 if (!br) {
719 printk(KERN_ERR "can't allocate memory\n");
720 result = -ENOMEM;
721 goto out;
722 }
723
724 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
725 GFP_KERNEL);
726 if (!br->levels) {
727 result = -ENOMEM;
728 goto out_free;
729 }
730
731 for (i = 0; i < obj->package.count; i++) {
732 o = (union acpi_object *)&obj->package.elements[i];
733 if (o->type != ACPI_TYPE_INTEGER) {
734 printk(KERN_ERR PREFIX "Invalid data\n");
735 continue;
736 }
737 br->levels[count] = (u32) o->integer.value;
738
739 if (br->levels[count] > max_level)
740 max_level = br->levels[count];
741 count++;
742 }
743
744 /*
745 * some buggy BIOS don't export the levels
746 * when machine is on AC/Battery in _BCL package.
747 * In this case, the first two elements in _BCL packages
748 * are also supported brightness levels that OS should take care of.
749 */
750 for (i = 2; i < count; i++)
751 if (br->levels[i] == br->levels[0] ||
752 br->levels[i] == br->levels[1])
753 level_ac_battery++;
754
755 if (level_ac_battery < 2) {
756 level_ac_battery = 2 - level_ac_battery;
757 br->flags._BCL_no_ac_battery_levels = 1;
758 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
759 br->levels[i] = br->levels[i - level_ac_battery];
760 count += level_ac_battery;
761 } else if (level_ac_battery > 2)
762 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
763
764 /* Check if the _BCL package is in a reversed order */
765 if (max_level == br->levels[2]) {
766 br->flags._BCL_reversed = 1;
767 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
768 acpi_video_cmp_level, NULL);
769 } else if (max_level != br->levels[count - 1])
770 ACPI_ERROR((AE_INFO,
771 "Found unordered _BCL package\n"));
772
773 br->count = count;
774 device->brightness = br;
775
776 /* Check the input/output of _BQC/_BCL/_BCM */
777 if ((max_level < 100) && (max_level <= (count - 2)))
778 br->flags._BCL_use_index = 1;
779
780 /*
781 * _BCM is always consistent with _BCL,
782 * at least for all the laptops we have ever seen.
783 */
784 br->flags._BCM_use_index = br->flags._BCL_use_index;
785
786 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
787 br->curr = max_level;
788 result = acpi_video_device_lcd_get_level_current(device, &level_old);
789 if (result)
790 goto out_free_levels;
791
792 result = acpi_video_device_lcd_set_level(device, br->curr);
793 if (result)
794 goto out_free_levels;
795
796 result = acpi_video_device_lcd_get_level_current(device, &level);
797 if (result)
798 goto out_free_levels;
799
800 if ((level != level_old) && !br->flags._BCM_use_index) {
801 /* Note:
802 * This piece of code does not work correctly if the current
803 * brightness levels is 0.
804 * But I guess boxes that boot with such a dark screen are rare
805 * and no more code is needed to cover this specifial case.
806 */
807
808 if (level_ac_battery != 2) {
809 /*
810 * For now, we don't support the _BCL like this:
811 * 16, 15, 0, 1, 2, 3, ..., 14, 15, 16
812 * because we may mess up the index returned by _BQC.
813 * Plus: we have not got a box like this.
814 */
815 ACPI_ERROR((AE_INFO, "_BCL not supported\n"));
816 }
817 br->flags._BQC_use_index = 1;
818 }
819
820 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
821 "found %d brightness levels\n", count - 2));
822 kfree(obj);
823 return result;
824
825 out_free_levels:
826 kfree(br->levels);
827 out_free:
828 kfree(br);
829 out:
830 device->brightness = NULL;
831 kfree(obj);
832 return result;
833 }
834
835 /*
836 * Arg:
837 * device : video output device (LCD, CRT, ..)
838 *
839 * Return Value:
840 * None
841 *
842 * Find out all required AML methods defined under the output
843 * device.
844 */
845
846 static void acpi_video_device_find_cap(struct acpi_video_device *device)
847 {
848 acpi_handle h_dummy1;
849
850
851 memset(&device->cap, 0, sizeof(device->cap));
852
853 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
854 device->cap._ADR = 1;
855 }
856 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
857 device->cap._BCL = 1;
858 }
859 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
860 device->cap._BCM = 1;
861 }
862 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
863 device->cap._BQC = 1;
864 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
865 device->cap._DDC = 1;
866 }
867 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
868 device->cap._DCS = 1;
869 }
870 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
871 device->cap._DGS = 1;
872 }
873 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
874 device->cap._DSS = 1;
875 }
876
877 if (acpi_video_backlight_support()) {
878 int result;
879 static int count = 0;
880 char *name;
881
882 result = acpi_video_init_brightness(device);
883 if (result)
884 return;
885 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
886 if (!name)
887 return;
888
889 sprintf(name, "acpi_video%d", count++);
890 device->backlight = backlight_device_register(name,
891 NULL, device, &acpi_backlight_ops);
892 device->backlight->props.max_brightness = device->brightness->count-3;
893 kfree(name);
894
895 device->cdev = thermal_cooling_device_register("LCD",
896 device->dev, &video_cooling_ops);
897 if (IS_ERR(device->cdev))
898 return;
899
900 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
901 device->cdev->id);
902 result = sysfs_create_link(&device->dev->dev.kobj,
903 &device->cdev->device.kobj,
904 "thermal_cooling");
905 if (result)
906 printk(KERN_ERR PREFIX "Create sysfs link\n");
907 result = sysfs_create_link(&device->cdev->device.kobj,
908 &device->dev->dev.kobj, "device");
909 if (result)
910 printk(KERN_ERR PREFIX "Create sysfs link\n");
911
912 }
913
914 if (acpi_video_display_switch_support()) {
915
916 if (device->cap._DCS && device->cap._DSS) {
917 static int count;
918 char *name;
919 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
920 if (!name)
921 return;
922 sprintf(name, "acpi_video%d", count++);
923 device->output_dev = video_output_register(name,
924 NULL, device, &acpi_output_properties);
925 kfree(name);
926 }
927 }
928 }
929
930 /*
931 * Arg:
932 * device : video output device (VGA)
933 *
934 * Return Value:
935 * None
936 *
937 * Find out all required AML methods defined under the video bus device.
938 */
939
940 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
941 {
942 acpi_handle h_dummy1;
943
944 memset(&video->cap, 0, sizeof(video->cap));
945 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
946 video->cap._DOS = 1;
947 }
948 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
949 video->cap._DOD = 1;
950 }
951 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
952 video->cap._ROM = 1;
953 }
954 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
955 video->cap._GPD = 1;
956 }
957 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
958 video->cap._SPD = 1;
959 }
960 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
961 video->cap._VPO = 1;
962 }
963 }
964
965 /*
966 * Check whether the video bus device has required AML method to
967 * support the desired features
968 */
969
970 static int acpi_video_bus_check(struct acpi_video_bus *video)
971 {
972 acpi_status status = -ENOENT;
973 struct device *dev;
974
975 if (!video)
976 return -EINVAL;
977
978 dev = acpi_get_physical_pci_device(video->device->handle);
979 if (!dev)
980 return -ENODEV;
981 put_device(dev);
982
983 /* Since there is no HID, CID and so on for VGA driver, we have
984 * to check well known required nodes.
985 */
986
987 /* Does this device support video switching? */
988 if (video->cap._DOS) {
989 video->flags.multihead = 1;
990 status = 0;
991 }
992
993 /* Does this device support retrieving a video ROM? */
994 if (video->cap._ROM) {
995 video->flags.rom = 1;
996 status = 0;
997 }
998
999 /* Does this device support configuring which video device to POST? */
1000 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1001 video->flags.post = 1;
1002 status = 0;
1003 }
1004
1005 return status;
1006 }
1007
1008 /* --------------------------------------------------------------------------
1009 FS Interface (/proc)
1010 -------------------------------------------------------------------------- */
1011
1012 static struct proc_dir_entry *acpi_video_dir;
1013
1014 /* video devices */
1015
1016 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1017 {
1018 struct acpi_video_device *dev = seq->private;
1019
1020
1021 if (!dev)
1022 goto end;
1023
1024 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1025 seq_printf(seq, "type: ");
1026 if (dev->flags.crt)
1027 seq_printf(seq, "CRT\n");
1028 else if (dev->flags.lcd)
1029 seq_printf(seq, "LCD\n");
1030 else if (dev->flags.tvout)
1031 seq_printf(seq, "TVOUT\n");
1032 else if (dev->flags.dvi)
1033 seq_printf(seq, "DVI\n");
1034 else
1035 seq_printf(seq, "UNKNOWN\n");
1036
1037 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1038
1039 end:
1040 return 0;
1041 }
1042
1043 static int
1044 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1045 {
1046 return single_open(file, acpi_video_device_info_seq_show,
1047 PDE(inode)->data);
1048 }
1049
1050 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1051 {
1052 int status;
1053 struct acpi_video_device *dev = seq->private;
1054 unsigned long long state;
1055
1056
1057 if (!dev)
1058 goto end;
1059
1060 status = acpi_video_device_get_state(dev, &state);
1061 seq_printf(seq, "state: ");
1062 if (ACPI_SUCCESS(status))
1063 seq_printf(seq, "0x%02llx\n", state);
1064 else
1065 seq_printf(seq, "<not supported>\n");
1066
1067 status = acpi_video_device_query(dev, &state);
1068 seq_printf(seq, "query: ");
1069 if (ACPI_SUCCESS(status))
1070 seq_printf(seq, "0x%02llx\n", state);
1071 else
1072 seq_printf(seq, "<not supported>\n");
1073
1074 end:
1075 return 0;
1076 }
1077
1078 static int
1079 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1080 {
1081 return single_open(file, acpi_video_device_state_seq_show,
1082 PDE(inode)->data);
1083 }
1084
1085 static ssize_t
1086 acpi_video_device_write_state(struct file *file,
1087 const char __user * buffer,
1088 size_t count, loff_t * data)
1089 {
1090 int status;
1091 struct seq_file *m = file->private_data;
1092 struct acpi_video_device *dev = m->private;
1093 char str[12] = { 0 };
1094 u32 state = 0;
1095
1096
1097 if (!dev || count + 1 > sizeof str)
1098 return -EINVAL;
1099
1100 if (copy_from_user(str, buffer, count))
1101 return -EFAULT;
1102
1103 str[count] = 0;
1104 state = simple_strtoul(str, NULL, 0);
1105 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1106
1107 status = acpi_video_device_set_state(dev, state);
1108
1109 if (status)
1110 return -EFAULT;
1111
1112 return count;
1113 }
1114
1115 static int
1116 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1117 {
1118 struct acpi_video_device *dev = seq->private;
1119 int i;
1120
1121
1122 if (!dev || !dev->brightness) {
1123 seq_printf(seq, "<not supported>\n");
1124 return 0;
1125 }
1126
1127 seq_printf(seq, "levels: ");
1128 for (i = 2; i < dev->brightness->count; i++)
1129 seq_printf(seq, " %d", dev->brightness->levels[i]);
1130 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1131
1132 return 0;
1133 }
1134
1135 static int
1136 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1137 {
1138 return single_open(file, acpi_video_device_brightness_seq_show,
1139 PDE(inode)->data);
1140 }
1141
1142 static ssize_t
1143 acpi_video_device_write_brightness(struct file *file,
1144 const char __user * buffer,
1145 size_t count, loff_t * data)
1146 {
1147 struct seq_file *m = file->private_data;
1148 struct acpi_video_device *dev = m->private;
1149 char str[5] = { 0 };
1150 unsigned int level = 0;
1151 int i;
1152
1153
1154 if (!dev || !dev->brightness || count + 1 > sizeof str)
1155 return -EINVAL;
1156
1157 if (copy_from_user(str, buffer, count))
1158 return -EFAULT;
1159
1160 str[count] = 0;
1161 level = simple_strtoul(str, NULL, 0);
1162
1163 if (level > 100)
1164 return -EFAULT;
1165
1166 /* validate through the list of available levels */
1167 for (i = 2; i < dev->brightness->count; i++)
1168 if (level == dev->brightness->levels[i]) {
1169 if (!acpi_video_device_lcd_set_level(dev, level))
1170 return count;
1171 break;
1172 }
1173
1174 return -EINVAL;
1175 }
1176
1177 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1178 {
1179 struct acpi_video_device *dev = seq->private;
1180 int status;
1181 int i;
1182 union acpi_object *edid = NULL;
1183
1184
1185 if (!dev)
1186 goto out;
1187
1188 status = acpi_video_device_EDID(dev, &edid, 128);
1189 if (ACPI_FAILURE(status)) {
1190 status = acpi_video_device_EDID(dev, &edid, 256);
1191 }
1192
1193 if (ACPI_FAILURE(status)) {
1194 goto out;
1195 }
1196
1197 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1198 for (i = 0; i < edid->buffer.length; i++)
1199 seq_putc(seq, edid->buffer.pointer[i]);
1200 }
1201
1202 out:
1203 if (!edid)
1204 seq_printf(seq, "<not supported>\n");
1205 else
1206 kfree(edid);
1207
1208 return 0;
1209 }
1210
1211 static int
1212 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1213 {
1214 return single_open(file, acpi_video_device_EDID_seq_show,
1215 PDE(inode)->data);
1216 }
1217
1218 static int acpi_video_device_add_fs(struct acpi_device *device)
1219 {
1220 struct proc_dir_entry *entry, *device_dir;
1221 struct acpi_video_device *vid_dev;
1222
1223 vid_dev = acpi_driver_data(device);
1224 if (!vid_dev)
1225 return -ENODEV;
1226
1227 device_dir = proc_mkdir(acpi_device_bid(device),
1228 vid_dev->video->dir);
1229 if (!device_dir)
1230 return -ENOMEM;
1231
1232 device_dir->owner = THIS_MODULE;
1233
1234 /* 'info' [R] */
1235 entry = proc_create_data("info", S_IRUGO, device_dir,
1236 &acpi_video_device_info_fops, acpi_driver_data(device));
1237 if (!entry)
1238 goto err_remove_dir;
1239
1240 /* 'state' [R/W] */
1241 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1242 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1243 device_dir,
1244 &acpi_video_device_state_fops,
1245 acpi_driver_data(device));
1246 if (!entry)
1247 goto err_remove_info;
1248
1249 /* 'brightness' [R/W] */
1250 acpi_video_device_brightness_fops.write =
1251 acpi_video_device_write_brightness;
1252 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1253 device_dir,
1254 &acpi_video_device_brightness_fops,
1255 acpi_driver_data(device));
1256 if (!entry)
1257 goto err_remove_state;
1258
1259 /* 'EDID' [R] */
1260 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1261 &acpi_video_device_EDID_fops,
1262 acpi_driver_data(device));
1263 if (!entry)
1264 goto err_remove_brightness;
1265
1266 acpi_device_dir(device) = device_dir;
1267
1268 return 0;
1269
1270 err_remove_brightness:
1271 remove_proc_entry("brightness", device_dir);
1272 err_remove_state:
1273 remove_proc_entry("state", device_dir);
1274 err_remove_info:
1275 remove_proc_entry("info", device_dir);
1276 err_remove_dir:
1277 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1278 return -ENOMEM;
1279 }
1280
1281 static int acpi_video_device_remove_fs(struct acpi_device *device)
1282 {
1283 struct acpi_video_device *vid_dev;
1284 struct proc_dir_entry *device_dir;
1285
1286 vid_dev = acpi_driver_data(device);
1287 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1288 return -ENODEV;
1289
1290 device_dir = acpi_device_dir(device);
1291 if (device_dir) {
1292 remove_proc_entry("info", device_dir);
1293 remove_proc_entry("state", device_dir);
1294 remove_proc_entry("brightness", device_dir);
1295 remove_proc_entry("EDID", device_dir);
1296 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1297 acpi_device_dir(device) = NULL;
1298 }
1299
1300 return 0;
1301 }
1302
1303 /* video bus */
1304 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1305 {
1306 struct acpi_video_bus *video = seq->private;
1307
1308
1309 if (!video)
1310 goto end;
1311
1312 seq_printf(seq, "Switching heads: %s\n",
1313 video->flags.multihead ? "yes" : "no");
1314 seq_printf(seq, "Video ROM: %s\n",
1315 video->flags.rom ? "yes" : "no");
1316 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1317 video->flags.post ? "yes" : "no");
1318
1319 end:
1320 return 0;
1321 }
1322
1323 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1324 {
1325 return single_open(file, acpi_video_bus_info_seq_show,
1326 PDE(inode)->data);
1327 }
1328
1329 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1330 {
1331 struct acpi_video_bus *video = seq->private;
1332
1333
1334 if (!video)
1335 goto end;
1336
1337 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1338 seq_printf(seq, "<TODO>\n");
1339
1340 end:
1341 return 0;
1342 }
1343
1344 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1345 {
1346 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1347 }
1348
1349 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1350 {
1351 struct acpi_video_bus *video = seq->private;
1352 unsigned long long options;
1353 int status;
1354
1355
1356 if (!video)
1357 goto end;
1358
1359 status = acpi_video_bus_POST_options(video, &options);
1360 if (ACPI_SUCCESS(status)) {
1361 if (!(options & 1)) {
1362 printk(KERN_WARNING PREFIX
1363 "The motherboard VGA device is not listed as a possible POST device.\n");
1364 printk(KERN_WARNING PREFIX
1365 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1366 }
1367 printk(KERN_WARNING "%llx\n", options);
1368 seq_printf(seq, "can POST: <integrated video>");
1369 if (options & 2)
1370 seq_printf(seq, " <PCI video>");
1371 if (options & 4)
1372 seq_printf(seq, " <AGP video>");
1373 seq_putc(seq, '\n');
1374 } else
1375 seq_printf(seq, "<not supported>\n");
1376 end:
1377 return 0;
1378 }
1379
1380 static int
1381 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1382 {
1383 return single_open(file, acpi_video_bus_POST_info_seq_show,
1384 PDE(inode)->data);
1385 }
1386
1387 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1388 {
1389 struct acpi_video_bus *video = seq->private;
1390 int status;
1391 unsigned long long id;
1392
1393
1394 if (!video)
1395 goto end;
1396
1397 status = acpi_video_bus_get_POST(video, &id);
1398 if (!ACPI_SUCCESS(status)) {
1399 seq_printf(seq, "<not supported>\n");
1400 goto end;
1401 }
1402 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1403
1404 end:
1405 return 0;
1406 }
1407
1408 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1409 {
1410 struct acpi_video_bus *video = seq->private;
1411
1412
1413 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1414
1415 return 0;
1416 }
1417
1418 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1419 {
1420 return single_open(file, acpi_video_bus_POST_seq_show,
1421 PDE(inode)->data);
1422 }
1423
1424 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1425 {
1426 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1427 }
1428
1429 static ssize_t
1430 acpi_video_bus_write_POST(struct file *file,
1431 const char __user * buffer,
1432 size_t count, loff_t * data)
1433 {
1434 int status;
1435 struct seq_file *m = file->private_data;
1436 struct acpi_video_bus *video = m->private;
1437 char str[12] = { 0 };
1438 unsigned long long opt, options;
1439
1440
1441 if (!video || count + 1 > sizeof str)
1442 return -EINVAL;
1443
1444 status = acpi_video_bus_POST_options(video, &options);
1445 if (!ACPI_SUCCESS(status))
1446 return -EINVAL;
1447
1448 if (copy_from_user(str, buffer, count))
1449 return -EFAULT;
1450
1451 str[count] = 0;
1452 opt = strtoul(str, NULL, 0);
1453 if (opt > 3)
1454 return -EFAULT;
1455
1456 /* just in case an OEM 'forgot' the motherboard... */
1457 options |= 1;
1458
1459 if (options & (1ul << opt)) {
1460 status = acpi_video_bus_set_POST(video, opt);
1461 if (!ACPI_SUCCESS(status))
1462 return -EFAULT;
1463
1464 }
1465
1466 return count;
1467 }
1468
1469 static ssize_t
1470 acpi_video_bus_write_DOS(struct file *file,
1471 const char __user * buffer,
1472 size_t count, loff_t * data)
1473 {
1474 int status;
1475 struct seq_file *m = file->private_data;
1476 struct acpi_video_bus *video = m->private;
1477 char str[12] = { 0 };
1478 unsigned long opt;
1479
1480
1481 if (!video || count + 1 > sizeof str)
1482 return -EINVAL;
1483
1484 if (copy_from_user(str, buffer, count))
1485 return -EFAULT;
1486
1487 str[count] = 0;
1488 opt = strtoul(str, NULL, 0);
1489 if (opt > 7)
1490 return -EFAULT;
1491
1492 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1493
1494 if (!ACPI_SUCCESS(status))
1495 return -EFAULT;
1496
1497 return count;
1498 }
1499
1500 static int acpi_video_bus_add_fs(struct acpi_device *device)
1501 {
1502 struct acpi_video_bus *video = acpi_driver_data(device);
1503 struct proc_dir_entry *device_dir;
1504 struct proc_dir_entry *entry;
1505
1506 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1507 if (!device_dir)
1508 return -ENOMEM;
1509
1510 device_dir->owner = THIS_MODULE;
1511
1512 /* 'info' [R] */
1513 entry = proc_create_data("info", S_IRUGO, device_dir,
1514 &acpi_video_bus_info_fops,
1515 acpi_driver_data(device));
1516 if (!entry)
1517 goto err_remove_dir;
1518
1519 /* 'ROM' [R] */
1520 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1521 &acpi_video_bus_ROM_fops,
1522 acpi_driver_data(device));
1523 if (!entry)
1524 goto err_remove_info;
1525
1526 /* 'POST_info' [R] */
1527 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1528 &acpi_video_bus_POST_info_fops,
1529 acpi_driver_data(device));
1530 if (!entry)
1531 goto err_remove_rom;
1532
1533 /* 'POST' [R/W] */
1534 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1535 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1536 device_dir,
1537 &acpi_video_bus_POST_fops,
1538 acpi_driver_data(device));
1539 if (!entry)
1540 goto err_remove_post_info;
1541
1542 /* 'DOS' [R/W] */
1543 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1544 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1545 device_dir,
1546 &acpi_video_bus_DOS_fops,
1547 acpi_driver_data(device));
1548 if (!entry)
1549 goto err_remove_post;
1550
1551 video->dir = acpi_device_dir(device) = device_dir;
1552 return 0;
1553
1554 err_remove_post:
1555 remove_proc_entry("POST", device_dir);
1556 err_remove_post_info:
1557 remove_proc_entry("POST_info", device_dir);
1558 err_remove_rom:
1559 remove_proc_entry("ROM", device_dir);
1560 err_remove_info:
1561 remove_proc_entry("info", device_dir);
1562 err_remove_dir:
1563 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1564 return -ENOMEM;
1565 }
1566
1567 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1568 {
1569 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1570
1571 if (device_dir) {
1572 remove_proc_entry("info", device_dir);
1573 remove_proc_entry("ROM", device_dir);
1574 remove_proc_entry("POST_info", device_dir);
1575 remove_proc_entry("POST", device_dir);
1576 remove_proc_entry("DOS", device_dir);
1577 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1578 acpi_device_dir(device) = NULL;
1579 }
1580
1581 return 0;
1582 }
1583
1584 /* --------------------------------------------------------------------------
1585 Driver Interface
1586 -------------------------------------------------------------------------- */
1587
1588 /* device interface */
1589 static struct acpi_video_device_attrib*
1590 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1591 {
1592 struct acpi_video_enumerated_device *ids;
1593 int i;
1594
1595 for (i = 0; i < video->attached_count; i++) {
1596 ids = &video->attached_array[i];
1597 if ((ids->value.int_val & 0xffff) == device_id)
1598 return &ids->value.attrib;
1599 }
1600
1601 return NULL;
1602 }
1603
1604 static int
1605 acpi_video_bus_get_one_device(struct acpi_device *device,
1606 struct acpi_video_bus *video)
1607 {
1608 unsigned long long device_id;
1609 int status;
1610 struct acpi_video_device *data;
1611 struct acpi_video_device_attrib* attribute;
1612
1613 if (!device || !video)
1614 return -EINVAL;
1615
1616 status =
1617 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1618 if (ACPI_SUCCESS(status)) {
1619
1620 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1621 if (!data)
1622 return -ENOMEM;
1623
1624 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1625 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1626 device->driver_data = data;
1627
1628 data->device_id = device_id;
1629 data->video = video;
1630 data->dev = device;
1631
1632 attribute = acpi_video_get_device_attr(video, device_id);
1633
1634 if((attribute != NULL) && attribute->device_id_scheme) {
1635 switch (attribute->display_type) {
1636 case ACPI_VIDEO_DISPLAY_CRT:
1637 data->flags.crt = 1;
1638 break;
1639 case ACPI_VIDEO_DISPLAY_TV:
1640 data->flags.tvout = 1;
1641 break;
1642 case ACPI_VIDEO_DISPLAY_DVI:
1643 data->flags.dvi = 1;
1644 break;
1645 case ACPI_VIDEO_DISPLAY_LCD:
1646 data->flags.lcd = 1;
1647 break;
1648 default:
1649 data->flags.unknown = 1;
1650 break;
1651 }
1652 if(attribute->bios_can_detect)
1653 data->flags.bios = 1;
1654 } else
1655 data->flags.unknown = 1;
1656
1657 acpi_video_device_bind(video, data);
1658 acpi_video_device_find_cap(data);
1659
1660 status = acpi_install_notify_handler(device->handle,
1661 ACPI_DEVICE_NOTIFY,
1662 acpi_video_device_notify,
1663 data);
1664 if (ACPI_FAILURE(status)) {
1665 printk(KERN_ERR PREFIX
1666 "Error installing notify handler\n");
1667 if(data->brightness)
1668 kfree(data->brightness->levels);
1669 kfree(data->brightness);
1670 kfree(data);
1671 return -ENODEV;
1672 }
1673
1674 mutex_lock(&video->device_list_lock);
1675 list_add_tail(&data->entry, &video->video_device_list);
1676 mutex_unlock(&video->device_list_lock);
1677
1678 acpi_video_device_add_fs(device);
1679
1680 return 0;
1681 }
1682
1683 return -ENOENT;
1684 }
1685
1686 /*
1687 * Arg:
1688 * video : video bus device
1689 *
1690 * Return:
1691 * none
1692 *
1693 * Enumerate the video device list of the video bus,
1694 * bind the ids with the corresponding video devices
1695 * under the video bus.
1696 */
1697
1698 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1699 {
1700 struct acpi_video_device *dev;
1701
1702 mutex_lock(&video->device_list_lock);
1703
1704 list_for_each_entry(dev, &video->video_device_list, entry)
1705 acpi_video_device_bind(video, dev);
1706
1707 mutex_unlock(&video->device_list_lock);
1708 }
1709
1710 /*
1711 * Arg:
1712 * video : video bus device
1713 * device : video output device under the video
1714 * bus
1715 *
1716 * Return:
1717 * none
1718 *
1719 * Bind the ids with the corresponding video devices
1720 * under the video bus.
1721 */
1722
1723 static void
1724 acpi_video_device_bind(struct acpi_video_bus *video,
1725 struct acpi_video_device *device)
1726 {
1727 struct acpi_video_enumerated_device *ids;
1728 int i;
1729
1730 for (i = 0; i < video->attached_count; i++) {
1731 ids = &video->attached_array[i];
1732 if (device->device_id == (ids->value.int_val & 0xffff)) {
1733 ids->bind_info = device;
1734 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1735 }
1736 }
1737 }
1738
1739 /*
1740 * Arg:
1741 * video : video bus device
1742 *
1743 * Return:
1744 * < 0 : error
1745 *
1746 * Call _DOD to enumerate all devices attached to display adapter
1747 *
1748 */
1749
1750 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1751 {
1752 int status;
1753 int count;
1754 int i;
1755 struct acpi_video_enumerated_device *active_list;
1756 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1757 union acpi_object *dod = NULL;
1758 union acpi_object *obj;
1759
1760 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1761 if (!ACPI_SUCCESS(status)) {
1762 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1763 return status;
1764 }
1765
1766 dod = buffer.pointer;
1767 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1768 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1769 status = -EFAULT;
1770 goto out;
1771 }
1772
1773 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1774 dod->package.count));
1775
1776 active_list = kcalloc(1 + dod->package.count,
1777 sizeof(struct acpi_video_enumerated_device),
1778 GFP_KERNEL);
1779 if (!active_list) {
1780 status = -ENOMEM;
1781 goto out;
1782 }
1783
1784 count = 0;
1785 for (i = 0; i < dod->package.count; i++) {
1786 obj = &dod->package.elements[i];
1787
1788 if (obj->type != ACPI_TYPE_INTEGER) {
1789 printk(KERN_ERR PREFIX
1790 "Invalid _DOD data in element %d\n", i);
1791 continue;
1792 }
1793
1794 active_list[count].value.int_val = obj->integer.value;
1795 active_list[count].bind_info = NULL;
1796 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1797 (int)obj->integer.value));
1798 count++;
1799 }
1800
1801 kfree(video->attached_array);
1802
1803 video->attached_array = active_list;
1804 video->attached_count = count;
1805
1806 out:
1807 kfree(buffer.pointer);
1808 return status;
1809 }
1810
1811 static int
1812 acpi_video_get_next_level(struct acpi_video_device *device,
1813 u32 level_current, u32 event)
1814 {
1815 int min, max, min_above, max_below, i, l, delta = 255;
1816 max = max_below = 0;
1817 min = min_above = 255;
1818 /* Find closest level to level_current */
1819 for (i = 2; i < device->brightness->count; i++) {
1820 l = device->brightness->levels[i];
1821 if (abs(l - level_current) < abs(delta)) {
1822 delta = l - level_current;
1823 if (!delta)
1824 break;
1825 }
1826 }
1827 /* Ajust level_current to closest available level */
1828 level_current += delta;
1829 for (i = 2; i < device->brightness->count; i++) {
1830 l = device->brightness->levels[i];
1831 if (l < min)
1832 min = l;
1833 if (l > max)
1834 max = l;
1835 if (l < min_above && l > level_current)
1836 min_above = l;
1837 if (l > max_below && l < level_current)
1838 max_below = l;
1839 }
1840
1841 switch (event) {
1842 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1843 return (level_current < max) ? min_above : min;
1844 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1845 return (level_current < max) ? min_above : max;
1846 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1847 return (level_current > min) ? max_below : min;
1848 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1849 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1850 return 0;
1851 default:
1852 return level_current;
1853 }
1854 }
1855
1856 static int
1857 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1858 {
1859 unsigned long long level_current, level_next;
1860 int result = -EINVAL;
1861
1862 if (!device->brightness)
1863 goto out;
1864
1865 result = acpi_video_device_lcd_get_level_current(device,
1866 &level_current);
1867 if (result)
1868 goto out;
1869
1870 level_next = acpi_video_get_next_level(device, level_current, event);
1871
1872 result = acpi_video_device_lcd_set_level(device, level_next);
1873
1874 out:
1875 if (result)
1876 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1877
1878 return result;
1879 }
1880
1881 static int
1882 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1883 struct acpi_device *device)
1884 {
1885 int status = 0;
1886 struct acpi_device *dev;
1887
1888 acpi_video_device_enumerate(video);
1889
1890 list_for_each_entry(dev, &device->children, node) {
1891
1892 status = acpi_video_bus_get_one_device(dev, video);
1893 if (ACPI_FAILURE(status)) {
1894 printk(KERN_WARNING PREFIX
1895 "Cant attach device");
1896 continue;
1897 }
1898 }
1899 return status;
1900 }
1901
1902 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1903 {
1904 acpi_status status;
1905 struct acpi_video_bus *video;
1906
1907
1908 if (!device || !device->video)
1909 return -ENOENT;
1910
1911 video = device->video;
1912
1913 acpi_video_device_remove_fs(device->dev);
1914
1915 status = acpi_remove_notify_handler(device->dev->handle,
1916 ACPI_DEVICE_NOTIFY,
1917 acpi_video_device_notify);
1918 backlight_device_unregister(device->backlight);
1919 if (device->cdev) {
1920 sysfs_remove_link(&device->dev->dev.kobj,
1921 "thermal_cooling");
1922 sysfs_remove_link(&device->cdev->device.kobj,
1923 "device");
1924 thermal_cooling_device_unregister(device->cdev);
1925 device->cdev = NULL;
1926 }
1927 video_output_unregister(device->output_dev);
1928
1929 return 0;
1930 }
1931
1932 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1933 {
1934 int status;
1935 struct acpi_video_device *dev, *next;
1936
1937 mutex_lock(&video->device_list_lock);
1938
1939 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1940
1941 status = acpi_video_bus_put_one_device(dev);
1942 if (ACPI_FAILURE(status))
1943 printk(KERN_WARNING PREFIX
1944 "hhuuhhuu bug in acpi video driver.\n");
1945
1946 if (dev->brightness) {
1947 kfree(dev->brightness->levels);
1948 kfree(dev->brightness);
1949 }
1950 list_del(&dev->entry);
1951 kfree(dev);
1952 }
1953
1954 mutex_unlock(&video->device_list_lock);
1955
1956 return 0;
1957 }
1958
1959 /* acpi_video interface */
1960
1961 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1962 {
1963 return acpi_video_bus_DOS(video, 0, 0);
1964 }
1965
1966 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1967 {
1968 return acpi_video_bus_DOS(video, 0, 1);
1969 }
1970
1971 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1972 {
1973 struct acpi_video_bus *video = data;
1974 struct acpi_device *device = NULL;
1975 struct input_dev *input;
1976 int keycode;
1977
1978 if (!video)
1979 return;
1980
1981 device = video->device;
1982 input = video->input;
1983
1984 switch (event) {
1985 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1986 * most likely via hotkey. */
1987 acpi_bus_generate_proc_event(device, event, 0);
1988 keycode = KEY_SWITCHVIDEOMODE;
1989 break;
1990
1991 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1992 * connector. */
1993 acpi_video_device_enumerate(video);
1994 acpi_video_device_rebind(video);
1995 acpi_bus_generate_proc_event(device, event, 0);
1996 keycode = KEY_SWITCHVIDEOMODE;
1997 break;
1998
1999 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2000 acpi_bus_generate_proc_event(device, event, 0);
2001 keycode = KEY_SWITCHVIDEOMODE;
2002 break;
2003 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2004 acpi_bus_generate_proc_event(device, event, 0);
2005 keycode = KEY_VIDEO_NEXT;
2006 break;
2007 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2008 acpi_bus_generate_proc_event(device, event, 0);
2009 keycode = KEY_VIDEO_PREV;
2010 break;
2011
2012 default:
2013 keycode = KEY_UNKNOWN;
2014 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2015 "Unsupported event [0x%x]\n", event));
2016 break;
2017 }
2018
2019 acpi_notifier_call_chain(device, event, 0);
2020 input_report_key(input, keycode, 1);
2021 input_sync(input);
2022 input_report_key(input, keycode, 0);
2023 input_sync(input);
2024
2025 return;
2026 }
2027
2028 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2029 {
2030 struct acpi_video_device *video_device = data;
2031 struct acpi_device *device = NULL;
2032 struct acpi_video_bus *bus;
2033 struct input_dev *input;
2034 int keycode;
2035
2036 if (!video_device)
2037 return;
2038
2039 device = video_device->dev;
2040 bus = video_device->video;
2041 input = bus->input;
2042
2043 switch (event) {
2044 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
2045 if (brightness_switch_enabled)
2046 acpi_video_switch_brightness(video_device, event);
2047 acpi_bus_generate_proc_event(device, event, 0);
2048 keycode = KEY_BRIGHTNESS_CYCLE;
2049 break;
2050 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
2051 if (brightness_switch_enabled)
2052 acpi_video_switch_brightness(video_device, event);
2053 acpi_bus_generate_proc_event(device, event, 0);
2054 keycode = KEY_BRIGHTNESSUP;
2055 break;
2056 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2057 if (brightness_switch_enabled)
2058 acpi_video_switch_brightness(video_device, event);
2059 acpi_bus_generate_proc_event(device, event, 0);
2060 keycode = KEY_BRIGHTNESSDOWN;
2061 break;
2062 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2063 if (brightness_switch_enabled)
2064 acpi_video_switch_brightness(video_device, event);
2065 acpi_bus_generate_proc_event(device, event, 0);
2066 keycode = KEY_BRIGHTNESS_ZERO;
2067 break;
2068 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2069 if (brightness_switch_enabled)
2070 acpi_video_switch_brightness(video_device, event);
2071 acpi_bus_generate_proc_event(device, event, 0);
2072 keycode = KEY_DISPLAY_OFF;
2073 break;
2074 default:
2075 keycode = KEY_UNKNOWN;
2076 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2077 "Unsupported event [0x%x]\n", event));
2078 break;
2079 }
2080
2081 acpi_notifier_call_chain(device, event, 0);
2082 input_report_key(input, keycode, 1);
2083 input_sync(input);
2084 input_report_key(input, keycode, 0);
2085 input_sync(input);
2086
2087 return;
2088 }
2089
2090 static int instance;
2091 static int acpi_video_resume(struct acpi_device *device)
2092 {
2093 struct acpi_video_bus *video;
2094 struct acpi_video_device *video_device;
2095 int i;
2096
2097 if (!device || !acpi_driver_data(device))
2098 return -EINVAL;
2099
2100 video = acpi_driver_data(device);
2101
2102 for (i = 0; i < video->attached_count; i++) {
2103 video_device = video->attached_array[i].bind_info;
2104 if (video_device && video_device->backlight)
2105 acpi_video_set_brightness(video_device->backlight);
2106 }
2107 return AE_OK;
2108 }
2109
2110 static int acpi_video_bus_add(struct acpi_device *device)
2111 {
2112 acpi_status status;
2113 struct acpi_video_bus *video;
2114 struct input_dev *input;
2115 int error;
2116
2117 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2118 if (!video)
2119 return -ENOMEM;
2120
2121 /* a hack to fix the duplicate name "VID" problem on T61 */
2122 if (!strcmp(device->pnp.bus_id, "VID")) {
2123 if (instance)
2124 device->pnp.bus_id[3] = '0' + instance;
2125 instance ++;
2126 }
2127 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2128 if (!strcmp(device->pnp.bus_id, "VGA")) {
2129 if (instance)
2130 device->pnp.bus_id[3] = '0' + instance;
2131 instance++;
2132 }
2133
2134 video->device = device;
2135 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2136 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2137 device->driver_data = video;
2138
2139 acpi_video_bus_find_cap(video);
2140 error = acpi_video_bus_check(video);
2141 if (error)
2142 goto err_free_video;
2143
2144 error = acpi_video_bus_add_fs(device);
2145 if (error)
2146 goto err_free_video;
2147
2148 mutex_init(&video->device_list_lock);
2149 INIT_LIST_HEAD(&video->video_device_list);
2150
2151 acpi_video_bus_get_devices(video, device);
2152 acpi_video_bus_start_devices(video);
2153
2154 status = acpi_install_notify_handler(device->handle,
2155 ACPI_DEVICE_NOTIFY,
2156 acpi_video_bus_notify, video);
2157 if (ACPI_FAILURE(status)) {
2158 printk(KERN_ERR PREFIX
2159 "Error installing notify handler\n");
2160 error = -ENODEV;
2161 goto err_stop_video;
2162 }
2163
2164 video->input = input = input_allocate_device();
2165 if (!input) {
2166 error = -ENOMEM;
2167 goto err_uninstall_notify;
2168 }
2169
2170 snprintf(video->phys, sizeof(video->phys),
2171 "%s/video/input0", acpi_device_hid(video->device));
2172
2173 input->name = acpi_device_name(video->device);
2174 input->phys = video->phys;
2175 input->id.bustype = BUS_HOST;
2176 input->id.product = 0x06;
2177 input->dev.parent = &device->dev;
2178 input->evbit[0] = BIT(EV_KEY);
2179 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2180 set_bit(KEY_VIDEO_NEXT, input->keybit);
2181 set_bit(KEY_VIDEO_PREV, input->keybit);
2182 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2183 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2184 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2185 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2186 set_bit(KEY_DISPLAY_OFF, input->keybit);
2187 set_bit(KEY_UNKNOWN, input->keybit);
2188
2189 error = input_register_device(input);
2190 if (error)
2191 goto err_free_input_dev;
2192
2193 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2194 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2195 video->flags.multihead ? "yes" : "no",
2196 video->flags.rom ? "yes" : "no",
2197 video->flags.post ? "yes" : "no");
2198
2199 return 0;
2200
2201 err_free_input_dev:
2202 input_free_device(input);
2203 err_uninstall_notify:
2204 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2205 acpi_video_bus_notify);
2206 err_stop_video:
2207 acpi_video_bus_stop_devices(video);
2208 acpi_video_bus_put_devices(video);
2209 kfree(video->attached_array);
2210 acpi_video_bus_remove_fs(device);
2211 err_free_video:
2212 kfree(video);
2213 device->driver_data = NULL;
2214
2215 return error;
2216 }
2217
2218 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2219 {
2220 acpi_status status = 0;
2221 struct acpi_video_bus *video = NULL;
2222
2223
2224 if (!device || !acpi_driver_data(device))
2225 return -EINVAL;
2226
2227 video = acpi_driver_data(device);
2228
2229 acpi_video_bus_stop_devices(video);
2230
2231 status = acpi_remove_notify_handler(video->device->handle,
2232 ACPI_DEVICE_NOTIFY,
2233 acpi_video_bus_notify);
2234
2235 acpi_video_bus_put_devices(video);
2236 acpi_video_bus_remove_fs(device);
2237
2238 input_unregister_device(video->input);
2239 kfree(video->attached_array);
2240 kfree(video);
2241
2242 return 0;
2243 }
2244
2245 static int __init acpi_video_init(void)
2246 {
2247 int result = 0;
2248
2249 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2250 if (!acpi_video_dir)
2251 return -ENODEV;
2252 acpi_video_dir->owner = THIS_MODULE;
2253
2254 result = acpi_bus_register_driver(&acpi_video_bus);
2255 if (result < 0) {
2256 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2257 return -ENODEV;
2258 }
2259
2260 return 0;
2261 }
2262
2263 static void __exit acpi_video_exit(void)
2264 {
2265
2266 acpi_bus_unregister_driver(&acpi_video_bus);
2267
2268 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2269
2270 return;
2271 }
2272
2273 module_init(acpi_video_init);
2274 module_exit(acpi_video_exit);
Linux kernel - Deliverables
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