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Merge branch 'linus' into release
[linux-2.6/verdex.git] / drivers / acpi / video.c
blobab06143672bc456ea9ed8c39349647caa8f8e888
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 <linux/pci.h>
41 #include <linux/pci_ids.h>
42 #include <asm/uaccess.h>
43
44 #include <acpi/acpi_bus.h>
45 #include <acpi/acpi_drivers.h>
46
47 #define ACPI_VIDEO_CLASS "video"
48 #define ACPI_VIDEO_BUS_NAME "Video Bus"
49 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
50 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
51 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
52 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
53 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
54 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
55
56 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
57 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
58 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
59 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
60 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
61
62 #define MAX_NAME_LEN 20
63
64 #define ACPI_VIDEO_DISPLAY_CRT 1
65 #define ACPI_VIDEO_DISPLAY_TV 2
66 #define ACPI_VIDEO_DISPLAY_DVI 3
67 #define ACPI_VIDEO_DISPLAY_LCD 4
68
69 #define _COMPONENT ACPI_VIDEO_COMPONENT
70 ACPI_MODULE_NAME("video");
71
72 MODULE_AUTHOR("Bruno Ducrot");
73 MODULE_DESCRIPTION("ACPI Video Driver");
74 MODULE_LICENSE("GPL");
75
76 static int brightness_switch_enabled = 1;
77 module_param(brightness_switch_enabled, bool, 0644);
78
79 static int acpi_video_bus_add(struct acpi_device *device);
80 static int acpi_video_bus_remove(struct acpi_device *device, int type);
81 static int acpi_video_resume(struct acpi_device *device);
82
83 static const struct acpi_device_id video_device_ids[] = {
84 {ACPI_VIDEO_HID, 0},
85 {"", 0},
86 };
87 MODULE_DEVICE_TABLE(acpi, video_device_ids);
88
89 static struct acpi_driver acpi_video_bus = {
90 .name = "video",
91 .class = ACPI_VIDEO_CLASS,
92 .ids = video_device_ids,
93 .ops = {
94 .add = acpi_video_bus_add,
95 .remove = acpi_video_bus_remove,
96 .resume = acpi_video_resume,
97 },
98 };
99
100 struct acpi_video_bus_flags {
101 u8 multihead:1; /* can switch video heads */
102 u8 rom:1; /* can retrieve a video rom */
103 u8 post:1; /* can configure the head to */
104 u8 reserved:5;
105 };
106
107 struct acpi_video_bus_cap {
108 u8 _DOS:1; /*Enable/Disable output switching */
109 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
110 u8 _ROM:1; /*Get ROM Data */
111 u8 _GPD:1; /*Get POST Device */
112 u8 _SPD:1; /*Set POST Device */
113 u8 _VPO:1; /*Video POST Options */
114 u8 reserved:2;
115 };
116
117 struct acpi_video_device_attrib {
118 u32 display_index:4; /* A zero-based instance of the Display */
119 u32 display_port_attachment:4; /*This field differentiates the display type */
120 u32 display_type:4; /*Describe the specific type in use */
121 u32 vendor_specific:4; /*Chipset Vendor Specific */
122 u32 bios_can_detect:1; /*BIOS can detect the device */
123 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
124 the VGA device. */
125 u32 pipe_id:3; /*For VGA multiple-head devices. */
126 u32 reserved:10; /*Must be 0 */
127 u32 device_id_scheme:1; /*Device ID Scheme */
128 };
129
130 struct acpi_video_enumerated_device {
131 union {
132 u32 int_val;
133 struct acpi_video_device_attrib attrib;
134 } value;
135 struct acpi_video_device *bind_info;
136 };
137
138 struct acpi_video_bus {
139 struct acpi_device *device;
140 u8 dos_setting;
141 struct acpi_video_enumerated_device *attached_array;
142 u8 attached_count;
143 struct acpi_video_bus_cap cap;
144 struct acpi_video_bus_flags flags;
145 struct list_head video_device_list;
146 struct mutex device_list_lock; /* protects video_device_list */
147 struct proc_dir_entry *dir;
148 struct input_dev *input;
149 char phys[32]; /* for input device */
150 };
151
152 struct acpi_video_device_flags {
153 u8 crt:1;
154 u8 lcd:1;
155 u8 tvout:1;
156 u8 dvi:1;
157 u8 bios:1;
158 u8 unknown:1;
159 u8 reserved:2;
160 };
161
162 struct acpi_video_device_cap {
163 u8 _ADR:1; /*Return the unique ID */
164 u8 _BCL:1; /*Query list of brightness control levels supported */
165 u8 _BCM:1; /*Set the brightness level */
166 u8 _BQC:1; /* Get current brightness level */
167 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
168 u8 _DDC:1; /*Return the EDID for this device */
169 u8 _DCS:1; /*Return status of output device */
170 u8 _DGS:1; /*Query graphics state */
171 u8 _DSS:1; /*Device state set */
172 };
173
174 struct acpi_video_brightness_flags {
175 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
176 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
177 u8 _BCL_use_index:1; /* levels in _BCL are index values */
178 u8 _BCM_use_index:1; /* input of _BCM is an index value */
179 u8 _BQC_use_index:1; /* _BQC returns an index value */
180 };
181
182 struct acpi_video_device_brightness {
183 int curr;
184 int count;
185 int *levels;
186 struct acpi_video_brightness_flags flags;
187 };
188
189 struct acpi_video_device {
190 unsigned long device_id;
191 struct acpi_video_device_flags flags;
192 struct acpi_video_device_cap cap;
193 struct list_head entry;
194 struct acpi_video_bus *video;
195 struct acpi_device *dev;
196 struct acpi_video_device_brightness *brightness;
197 struct backlight_device *backlight;
198 struct thermal_cooling_device *cdev;
199 struct output_device *output_dev;
200 };
201
202 /* bus */
203 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
204 static const struct file_operations acpi_video_bus_info_fops = {
205 .owner = THIS_MODULE,
206 .open = acpi_video_bus_info_open_fs,
207 .read = seq_read,
208 .llseek = seq_lseek,
209 .release = single_release,
210 };
211
212 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
213 static const struct file_operations acpi_video_bus_ROM_fops = {
214 .owner = THIS_MODULE,
215 .open = acpi_video_bus_ROM_open_fs,
216 .read = seq_read,
217 .llseek = seq_lseek,
218 .release = single_release,
219 };
220
221 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
222 struct file *file);
223 static const struct file_operations acpi_video_bus_POST_info_fops = {
224 .owner = THIS_MODULE,
225 .open = acpi_video_bus_POST_info_open_fs,
226 .read = seq_read,
227 .llseek = seq_lseek,
228 .release = single_release,
229 };
230
231 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
232 static ssize_t acpi_video_bus_write_POST(struct file *file,
233 const char __user *buffer, size_t count, loff_t *data);
234 static const struct file_operations acpi_video_bus_POST_fops = {
235 .owner = THIS_MODULE,
236 .open = acpi_video_bus_POST_open_fs,
237 .read = seq_read,
238 .write = acpi_video_bus_write_POST,
239 .llseek = seq_lseek,
240 .release = single_release,
241 };
242
243 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
244 static ssize_t acpi_video_bus_write_DOS(struct file *file,
245 const char __user *buffer, size_t count, loff_t *data);
246 static const struct file_operations acpi_video_bus_DOS_fops = {
247 .owner = THIS_MODULE,
248 .open = acpi_video_bus_DOS_open_fs,
249 .read = seq_read,
250 .write = acpi_video_bus_write_DOS,
251 .llseek = seq_lseek,
252 .release = single_release,
253 };
254
255 /* device */
256 static int acpi_video_device_info_open_fs(struct inode *inode,
257 struct file *file);
258 static const struct file_operations acpi_video_device_info_fops = {
259 .owner = THIS_MODULE,
260 .open = acpi_video_device_info_open_fs,
261 .read = seq_read,
262 .llseek = seq_lseek,
263 .release = single_release,
264 };
265
266 static int acpi_video_device_state_open_fs(struct inode *inode,
267 struct file *file);
268 static ssize_t acpi_video_device_write_state(struct file *file,
269 const char __user *buffer, size_t count, loff_t *data);
270 static const struct file_operations acpi_video_device_state_fops = {
271 .owner = THIS_MODULE,
272 .open = acpi_video_device_state_open_fs,
273 .read = seq_read,
274 .write = acpi_video_device_write_state,
275 .llseek = seq_lseek,
276 .release = single_release,
277 };
278
279 static int acpi_video_device_brightness_open_fs(struct inode *inode,
280 struct file *file);
281 static ssize_t acpi_video_device_write_brightness(struct file *file,
282 const char __user *buffer, size_t count, loff_t *data);
283 static struct file_operations acpi_video_device_brightness_fops = {
284 .owner = THIS_MODULE,
285 .open = acpi_video_device_brightness_open_fs,
286 .read = seq_read,
287 .write = acpi_video_device_write_brightness,
288 .llseek = seq_lseek,
289 .release = single_release,
290 };
291
292 static int acpi_video_device_EDID_open_fs(struct inode *inode,
293 struct file *file);
294 static const struct file_operations acpi_video_device_EDID_fops = {
295 .owner = THIS_MODULE,
296 .open = acpi_video_device_EDID_open_fs,
297 .read = seq_read,
298 .llseek = seq_lseek,
299 .release = single_release,
300 };
301
302 static const char device_decode[][30] = {
303 "motherboard VGA device",
304 "PCI VGA device",
305 "AGP VGA device",
306 "UNKNOWN",
307 };
308
309 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
310 static void acpi_video_device_rebind(struct acpi_video_bus *video);
311 static void acpi_video_device_bind(struct acpi_video_bus *video,
312 struct acpi_video_device *device);
313 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
314 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
315 int level);
316 static int acpi_video_device_lcd_get_level_current(
317 struct acpi_video_device *device,
318 unsigned long long *level);
319 static int acpi_video_get_next_level(struct acpi_video_device *device,
320 u32 level_current, u32 event);
321 static int acpi_video_switch_brightness(struct acpi_video_device *device,
322 int event);
323 static int acpi_video_device_get_state(struct acpi_video_device *device,
324 unsigned long long *state);
325 static int acpi_video_output_get(struct output_device *od);
326 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
327
328 /*backlight device sysfs support*/
329 static int acpi_video_get_brightness(struct backlight_device *bd)
330 {
331 unsigned long long cur_level;
332 int i;
333 struct acpi_video_device *vd =
334 (struct acpi_video_device *)bl_get_data(bd);
335
336 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
337 return -EINVAL;
338 for (i = 2; i < vd->brightness->count; i++) {
339 if (vd->brightness->levels[i] == cur_level)
340 /* The first two entries are special - see page 575
341 of the ACPI spec 3.0 */
342 return i-2;
343 }
344 return 0;
345 }
346
347 static int acpi_video_set_brightness(struct backlight_device *bd)
348 {
349 int request_level = bd->props.brightness + 2;
350 struct acpi_video_device *vd =
351 (struct acpi_video_device *)bl_get_data(bd);
352
353 return acpi_video_device_lcd_set_level(vd,
354 vd->brightness->levels[request_level]);
355 }
356
357 static struct backlight_ops acpi_backlight_ops = {
358 .get_brightness = acpi_video_get_brightness,
359 .update_status = acpi_video_set_brightness,
360 };
361
362 /*video output device sysfs support*/
363 static int acpi_video_output_get(struct output_device *od)
364 {
365 unsigned long long state;
366 struct acpi_video_device *vd =
367 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
368 acpi_video_device_get_state(vd, &state);
369 return (int)state;
370 }
371
372 static int acpi_video_output_set(struct output_device *od)
373 {
374 unsigned long state = od->request_state;
375 struct acpi_video_device *vd=
376 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
377 return acpi_video_device_set_state(vd, state);
378 }
379
380 static struct output_properties acpi_output_properties = {
381 .set_state = acpi_video_output_set,
382 .get_status = acpi_video_output_get,
383 };
384
385
386 /* thermal cooling device callbacks */
387 static int video_get_max_state(struct thermal_cooling_device *cdev, unsigned
388 long *state)
389 {
390 struct acpi_device *device = cdev->devdata;
391 struct acpi_video_device *video = acpi_driver_data(device);
392
393 *state = video->brightness->count - 3;
394 return 0;
395 }
396
397 static int video_get_cur_state(struct thermal_cooling_device *cdev, unsigned
398 long *state)
399 {
400 struct acpi_device *device = cdev->devdata;
401 struct acpi_video_device *video = acpi_driver_data(device);
402 unsigned long long level;
403 int offset;
404
405 if (acpi_video_device_lcd_get_level_current(video, &level))
406 return -EINVAL;
407 for (offset = 2; offset < video->brightness->count; offset++)
408 if (level == video->brightness->levels[offset]) {
409 *state = video->brightness->count - offset - 1;
410 return 0;
411 }
412
413 return -EINVAL;
414 }
415
416 static int
417 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
418 {
419 struct acpi_device *device = cdev->devdata;
420 struct acpi_video_device *video = acpi_driver_data(device);
421 int level;
422
423 if ( state >= video->brightness->count - 2)
424 return -EINVAL;
425
426 state = video->brightness->count - state;
427 level = video->brightness->levels[state -1];
428 return acpi_video_device_lcd_set_level(video, level);
429 }
430
431 static struct thermal_cooling_device_ops video_cooling_ops = {
432 .get_max_state = video_get_max_state,
433 .get_cur_state = video_get_cur_state,
434 .set_cur_state = video_set_cur_state,
435 };
436
437 /* --------------------------------------------------------------------------
438 Video Management
439 -------------------------------------------------------------------------- */
440
441 /* device */
442
443 static int
444 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
445 {
446 int status;
447
448 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
449
450 return status;
451 }
452
453 static int
454 acpi_video_device_get_state(struct acpi_video_device *device,
455 unsigned long long *state)
456 {
457 int status;
458
459 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
460
461 return status;
462 }
463
464 static int
465 acpi_video_device_set_state(struct acpi_video_device *device, int state)
466 {
467 int status;
468 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
469 struct acpi_object_list args = { 1, &arg0 };
470 unsigned long long ret;
471
472
473 arg0.integer.value = state;
474 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
475
476 return status;
477 }
478
479 static int
480 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
481 union acpi_object **levels)
482 {
483 int status;
484 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
485 union acpi_object *obj;
486
487
488 *levels = NULL;
489
490 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
491 if (!ACPI_SUCCESS(status))
492 return status;
493 obj = (union acpi_object *)buffer.pointer;
494 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
495 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
496 status = -EFAULT;
497 goto err;
498 }
499
500 *levels = obj;
501
502 return 0;
503
504 err:
505 kfree(buffer.pointer);
506
507 return status;
508 }
509
510 static int
511 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
512 {
513 int status;
514 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
515 struct acpi_object_list args = { 1, &arg0 };
516 int state;
517
518 arg0.integer.value = level;
519
520 status = acpi_evaluate_object(device->dev->handle, "_BCM",
521 &args, NULL);
522 if (ACPI_FAILURE(status)) {
523 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
524 return -EIO;
525 }
526
527 device->brightness->curr = level;
528 for (state = 2; state < device->brightness->count; state++)
529 if (level == device->brightness->levels[state]) {
530 if (device->backlight)
531 device->backlight->props.brightness = state - 2;
532 return 0;
533 }
534
535 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
536 return -EINVAL;
537 }
538
539 static int
540 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
541 unsigned long long *level)
542 {
543 acpi_status status = AE_OK;
544
545 if (device->cap._BQC || device->cap._BCQ) {
546 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
547
548 status = acpi_evaluate_integer(device->dev->handle, buf,
549 NULL, level);
550 if (ACPI_SUCCESS(status)) {
551 if (device->brightness->flags._BQC_use_index) {
552 if (device->brightness->flags._BCL_reversed)
553 *level = device->brightness->count
554 - 3 - (*level);
555 *level = device->brightness->levels[*level + 2];
556
557 }
558 device->brightness->curr = *level;
559 return 0;
560 } else {
561 /* Fixme:
562 * should we return an error or ignore this failure?
563 * dev->brightness->curr is a cached value which stores
564 * the correct current backlight level in most cases.
565 * ACPI video backlight still works w/ buggy _BQC.
566 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
567 */
568 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
569 device->cap._BQC = device->cap._BCQ = 0;
570 }
571 }
572
573 *level = device->brightness->curr;
574 return 0;
575 }
576
577 static int
578 acpi_video_device_EDID(struct acpi_video_device *device,
579 union acpi_object **edid, ssize_t length)
580 {
581 int status;
582 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
583 union acpi_object *obj;
584 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
585 struct acpi_object_list args = { 1, &arg0 };
586
587
588 *edid = NULL;
589
590 if (!device)
591 return -ENODEV;
592 if (length == 128)
593 arg0.integer.value = 1;
594 else if (length == 256)
595 arg0.integer.value = 2;
596 else
597 return -EINVAL;
598
599 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
600 if (ACPI_FAILURE(status))
601 return -ENODEV;
602
603 obj = buffer.pointer;
604
605 if (obj && obj->type == ACPI_TYPE_BUFFER)
606 *edid = obj;
607 else {
608 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
609 status = -EFAULT;
610 kfree(obj);
611 }
612
613 return status;
614 }
615
616 /* bus */
617
618 static int
619 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
620 {
621 int status;
622 unsigned long long tmp;
623 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
624 struct acpi_object_list args = { 1, &arg0 };
625
626
627 arg0.integer.value = option;
628
629 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
630 if (ACPI_SUCCESS(status))
631 status = tmp ? (-EINVAL) : (AE_OK);
632
633 return status;
634 }
635
636 static int
637 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
638 {
639 int status;
640
641 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
642
643 return status;
644 }
645
646 static int
647 acpi_video_bus_POST_options(struct acpi_video_bus *video,
648 unsigned long long *options)
649 {
650 int status;
651
652 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
653 *options &= 3;
654
655 return status;
656 }
657
658 /*
659 * Arg:
660 * video : video bus device pointer
661 * bios_flag :
662 * 0. The system BIOS should NOT automatically switch(toggle)
663 * the active display output.
664 * 1. The system BIOS should automatically switch (toggle) the
665 * active display output. No switch event.
666 * 2. The _DGS value should be locked.
667 * 3. The system BIOS should not automatically switch (toggle) the
668 * active display output, but instead generate the display switch
669 * event notify code.
670 * lcd_flag :
671 * 0. The system BIOS should automatically control the brightness level
672 * of the LCD when the power changes from AC to DC
673 * 1. The system BIOS should NOT automatically control the brightness
674 * level of the LCD when the power changes from AC to DC.
675 * Return Value:
676 * -1 wrong arg.
677 */
678
679 static int
680 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
681 {
682 acpi_integer status = 0;
683 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
684 struct acpi_object_list args = { 1, &arg0 };
685
686
687 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
688 status = -1;
689 goto Failed;
690 }
691 arg0.integer.value = (lcd_flag << 2) | bios_flag;
692 video->dos_setting = arg0.integer.value;
693 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
694
695 Failed:
696 return status;
697 }
698
699 /*
700 * Simple comparison function used to sort backlight levels.
701 */
702
703 static int
704 acpi_video_cmp_level(const void *a, const void *b)
705 {
706 return *(int *)a - *(int *)b;
707 }
708
709 /*
710 * Arg:
711 * device : video output device (LCD, CRT, ..)
712 *
713 * Return Value:
714 * Maximum brightness level
715 *
716 * Allocate and initialize device->brightness.
717 */
718
719 static int
720 acpi_video_init_brightness(struct acpi_video_device *device)
721 {
722 union acpi_object *obj = NULL;
723 int i, max_level = 0, count = 0, level_ac_battery = 0;
724 unsigned long long level, level_old;
725 union acpi_object *o;
726 struct acpi_video_device_brightness *br = NULL;
727 int result = -EINVAL;
728
729 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
730 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
731 "LCD brightness level\n"));
732 goto out;
733 }
734
735 if (obj->package.count < 2)
736 goto out;
737
738 br = kzalloc(sizeof(*br), GFP_KERNEL);
739 if (!br) {
740 printk(KERN_ERR "can't allocate memory\n");
741 result = -ENOMEM;
742 goto out;
743 }
744
745 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
746 GFP_KERNEL);
747 if (!br->levels) {
748 result = -ENOMEM;
749 goto out_free;
750 }
751
752 for (i = 0; i < obj->package.count; i++) {
753 o = (union acpi_object *)&obj->package.elements[i];
754 if (o->type != ACPI_TYPE_INTEGER) {
755 printk(KERN_ERR PREFIX "Invalid data\n");
756 continue;
757 }
758 br->levels[count] = (u32) o->integer.value;
759
760 if (br->levels[count] > max_level)
761 max_level = br->levels[count];
762 count++;
763 }
764
765 /*
766 * some buggy BIOS don't export the levels
767 * when machine is on AC/Battery in _BCL package.
768 * In this case, the first two elements in _BCL packages
769 * are also supported brightness levels that OS should take care of.
770 */
771 for (i = 2; i < count; i++)
772 if (br->levels[i] == br->levels[0] ||
773 br->levels[i] == br->levels[1])
774 level_ac_battery++;
775
776 if (level_ac_battery < 2) {
777 level_ac_battery = 2 - level_ac_battery;
778 br->flags._BCL_no_ac_battery_levels = 1;
779 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
780 br->levels[i] = br->levels[i - level_ac_battery];
781 count += level_ac_battery;
782 } else if (level_ac_battery > 2)
783 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
784
785 /* Check if the _BCL package is in a reversed order */
786 if (max_level == br->levels[2]) {
787 br->flags._BCL_reversed = 1;
788 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
789 acpi_video_cmp_level, NULL);
790 } else if (max_level != br->levels[count - 1])
791 ACPI_ERROR((AE_INFO,
792 "Found unordered _BCL package\n"));
793
794 br->count = count;
795 device->brightness = br;
796
797 /* Check the input/output of _BQC/_BCL/_BCM */
798 if ((max_level < 100) && (max_level <= (count - 2)))
799 br->flags._BCL_use_index = 1;
800
801 /*
802 * _BCM is always consistent with _BCL,
803 * at least for all the laptops we have ever seen.
804 */
805 br->flags._BCM_use_index = br->flags._BCL_use_index;
806
807 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
808 br->curr = max_level;
809 result = acpi_video_device_lcd_get_level_current(device, &level_old);
810 if (result)
811 goto out_free_levels;
812
813 result = acpi_video_device_lcd_set_level(device, br->curr);
814 if (result)
815 goto out_free_levels;
816
817 result = acpi_video_device_lcd_get_level_current(device, &level);
818 if (result)
819 goto out_free_levels;
820
821 if ((level != level_old) && !br->flags._BCM_use_index) {
822 /* Note:
823 * This piece of code does not work correctly if the current
824 * brightness levels is 0.
825 * But I guess boxes that boot with such a dark screen are rare
826 * and no more code is needed to cover this specifial case.
827 */
828
829 if (level_ac_battery != 2) {
830 /*
831 * For now, we don't support the _BCL like this:
832 * 16, 15, 0, 1, 2, 3, ..., 14, 15, 16
833 * because we may mess up the index returned by _BQC.
834 * Plus: we have not got a box like this.
835 */
836 ACPI_ERROR((AE_INFO, "_BCL not supported\n"));
837 }
838 br->flags._BQC_use_index = 1;
839 }
840
841 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
842 "found %d brightness levels\n", count - 2));
843 kfree(obj);
844 return result;
845
846 out_free_levels:
847 kfree(br->levels);
848 out_free:
849 kfree(br);
850 out:
851 device->brightness = NULL;
852 kfree(obj);
853 return result;
854 }
855
856 /*
857 * Arg:
858 * device : video output device (LCD, CRT, ..)
859 *
860 * Return Value:
861 * None
862 *
863 * Find out all required AML methods defined under the output
864 * device.
865 */
866
867 static void acpi_video_device_find_cap(struct acpi_video_device *device)
868 {
869 acpi_handle h_dummy1;
870
871
872 memset(&device->cap, 0, sizeof(device->cap));
873
874 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
875 device->cap._ADR = 1;
876 }
877 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
878 device->cap._BCL = 1;
879 }
880 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
881 device->cap._BCM = 1;
882 }
883 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
884 device->cap._BQC = 1;
885 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
886 &h_dummy1))) {
887 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
888 device->cap._BCQ = 1;
889 }
890
891 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
892 device->cap._DDC = 1;
893 }
894 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
895 device->cap._DCS = 1;
896 }
897 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
898 device->cap._DGS = 1;
899 }
900 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
901 device->cap._DSS = 1;
902 }
903
904 if (acpi_video_backlight_support()) {
905 int result;
906 static int count = 0;
907 char *name;
908
909 result = acpi_video_init_brightness(device);
910 if (result)
911 return;
912 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
913 if (!name)
914 return;
915
916 sprintf(name, "acpi_video%d", count++);
917 device->backlight = backlight_device_register(name,
918 NULL, device, &acpi_backlight_ops);
919 device->backlight->props.max_brightness = device->brightness->count-3;
920 kfree(name);
921
922 device->cdev = thermal_cooling_device_register("LCD",
923 device->dev, &video_cooling_ops);
924 if (IS_ERR(device->cdev))
925 return;
926
927 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
928 device->cdev->id);
929 result = sysfs_create_link(&device->dev->dev.kobj,
930 &device->cdev->device.kobj,
931 "thermal_cooling");
932 if (result)
933 printk(KERN_ERR PREFIX "Create sysfs link\n");
934 result = sysfs_create_link(&device->cdev->device.kobj,
935 &device->dev->dev.kobj, "device");
936 if (result)
937 printk(KERN_ERR PREFIX "Create sysfs link\n");
938
939 }
940
941 if (acpi_video_display_switch_support()) {
942
943 if (device->cap._DCS && device->cap._DSS) {
944 static int count;
945 char *name;
946 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
947 if (!name)
948 return;
949 sprintf(name, "acpi_video%d", count++);
950 device->output_dev = video_output_register(name,
951 NULL, device, &acpi_output_properties);
952 kfree(name);
953 }
954 }
955 }
956
957 /*
958 * Arg:
959 * device : video output device (VGA)
960 *
961 * Return Value:
962 * None
963 *
964 * Find out all required AML methods defined under the video bus device.
965 */
966
967 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
968 {
969 acpi_handle h_dummy1;
970
971 memset(&video->cap, 0, sizeof(video->cap));
972 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
973 video->cap._DOS = 1;
974 }
975 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
976 video->cap._DOD = 1;
977 }
978 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
979 video->cap._ROM = 1;
980 }
981 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
982 video->cap._GPD = 1;
983 }
984 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
985 video->cap._SPD = 1;
986 }
987 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
988 video->cap._VPO = 1;
989 }
990 }
991
992 /*
993 * Check whether the video bus device has required AML method to
994 * support the desired features
995 */
996
997 static int acpi_video_bus_check(struct acpi_video_bus *video)
998 {
999 acpi_status status = -ENOENT;
1000 struct device *dev;
1001
1002 if (!video)
1003 return -EINVAL;
1004
1005 dev = acpi_get_physical_pci_device(video->device->handle);
1006 if (!dev)
1007 return -ENODEV;
1008 put_device(dev);
1009
1010 /* Since there is no HID, CID and so on for VGA driver, we have
1011 * to check well known required nodes.
1012 */
1013
1014 /* Does this device support video switching? */
1015 if (video->cap._DOS) {
1016 video->flags.multihead = 1;
1017 status = 0;
1018 }
1019
1020 /* Does this device support retrieving a video ROM? */
1021 if (video->cap._ROM) {
1022 video->flags.rom = 1;
1023 status = 0;
1024 }
1025
1026 /* Does this device support configuring which video device to POST? */
1027 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1028 video->flags.post = 1;
1029 status = 0;
1030 }
1031
1032 return status;
1033 }
1034
1035 /* --------------------------------------------------------------------------
1036 FS Interface (/proc)
1037 -------------------------------------------------------------------------- */
1038
1039 static struct proc_dir_entry *acpi_video_dir;
1040
1041 /* video devices */
1042
1043 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1044 {
1045 struct acpi_video_device *dev = seq->private;
1046
1047
1048 if (!dev)
1049 goto end;
1050
1051 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1052 seq_printf(seq, "type: ");
1053 if (dev->flags.crt)
1054 seq_printf(seq, "CRT\n");
1055 else if (dev->flags.lcd)
1056 seq_printf(seq, "LCD\n");
1057 else if (dev->flags.tvout)
1058 seq_printf(seq, "TVOUT\n");
1059 else if (dev->flags.dvi)
1060 seq_printf(seq, "DVI\n");
1061 else
1062 seq_printf(seq, "UNKNOWN\n");
1063
1064 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1065
1066 end:
1067 return 0;
1068 }
1069
1070 static int
1071 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1072 {
1073 return single_open(file, acpi_video_device_info_seq_show,
1074 PDE(inode)->data);
1075 }
1076
1077 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1078 {
1079 int status;
1080 struct acpi_video_device *dev = seq->private;
1081 unsigned long long state;
1082
1083
1084 if (!dev)
1085 goto end;
1086
1087 status = acpi_video_device_get_state(dev, &state);
1088 seq_printf(seq, "state: ");
1089 if (ACPI_SUCCESS(status))
1090 seq_printf(seq, "0x%02llx\n", state);
1091 else
1092 seq_printf(seq, "<not supported>\n");
1093
1094 status = acpi_video_device_query(dev, &state);
1095 seq_printf(seq, "query: ");
1096 if (ACPI_SUCCESS(status))
1097 seq_printf(seq, "0x%02llx\n", state);
1098 else
1099 seq_printf(seq, "<not supported>\n");
1100
1101 end:
1102 return 0;
1103 }
1104
1105 static int
1106 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1107 {
1108 return single_open(file, acpi_video_device_state_seq_show,
1109 PDE(inode)->data);
1110 }
1111
1112 static ssize_t
1113 acpi_video_device_write_state(struct file *file,
1114 const char __user * buffer,
1115 size_t count, loff_t * data)
1116 {
1117 int status;
1118 struct seq_file *m = file->private_data;
1119 struct acpi_video_device *dev = m->private;
1120 char str[12] = { 0 };
1121 u32 state = 0;
1122
1123
1124 if (!dev || count + 1 > sizeof str)
1125 return -EINVAL;
1126
1127 if (copy_from_user(str, buffer, count))
1128 return -EFAULT;
1129
1130 str[count] = 0;
1131 state = simple_strtoul(str, NULL, 0);
1132 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1133
1134 status = acpi_video_device_set_state(dev, state);
1135
1136 if (status)
1137 return -EFAULT;
1138
1139 return count;
1140 }
1141
1142 static int
1143 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1144 {
1145 struct acpi_video_device *dev = seq->private;
1146 int i;
1147
1148
1149 if (!dev || !dev->brightness) {
1150 seq_printf(seq, "<not supported>\n");
1151 return 0;
1152 }
1153
1154 seq_printf(seq, "levels: ");
1155 for (i = 2; i < dev->brightness->count; i++)
1156 seq_printf(seq, " %d", dev->brightness->levels[i]);
1157 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1158
1159 return 0;
1160 }
1161
1162 static int
1163 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1164 {
1165 return single_open(file, acpi_video_device_brightness_seq_show,
1166 PDE(inode)->data);
1167 }
1168
1169 static ssize_t
1170 acpi_video_device_write_brightness(struct file *file,
1171 const char __user * buffer,
1172 size_t count, loff_t * data)
1173 {
1174 struct seq_file *m = file->private_data;
1175 struct acpi_video_device *dev = m->private;
1176 char str[5] = { 0 };
1177 unsigned int level = 0;
1178 int i;
1179
1180
1181 if (!dev || !dev->brightness || count + 1 > sizeof str)
1182 return -EINVAL;
1183
1184 if (copy_from_user(str, buffer, count))
1185 return -EFAULT;
1186
1187 str[count] = 0;
1188 level = simple_strtoul(str, NULL, 0);
1189
1190 if (level > 100)
1191 return -EFAULT;
1192
1193 /* validate through the list of available levels */
1194 for (i = 2; i < dev->brightness->count; i++)
1195 if (level == dev->brightness->levels[i]) {
1196 if (!acpi_video_device_lcd_set_level(dev, level))
1197 return count;
1198 break;
1199 }
1200
1201 return -EINVAL;
1202 }
1203
1204 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1205 {
1206 struct acpi_video_device *dev = seq->private;
1207 int status;
1208 int i;
1209 union acpi_object *edid = NULL;
1210
1211
1212 if (!dev)
1213 goto out;
1214
1215 status = acpi_video_device_EDID(dev, &edid, 128);
1216 if (ACPI_FAILURE(status)) {
1217 status = acpi_video_device_EDID(dev, &edid, 256);
1218 }
1219
1220 if (ACPI_FAILURE(status)) {
1221 goto out;
1222 }
1223
1224 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1225 for (i = 0; i < edid->buffer.length; i++)
1226 seq_putc(seq, edid->buffer.pointer[i]);
1227 }
1228
1229 out:
1230 if (!edid)
1231 seq_printf(seq, "<not supported>\n");
1232 else
1233 kfree(edid);
1234
1235 return 0;
1236 }
1237
1238 static int
1239 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1240 {
1241 return single_open(file, acpi_video_device_EDID_seq_show,
1242 PDE(inode)->data);
1243 }
1244
1245 static int acpi_video_device_add_fs(struct acpi_device *device)
1246 {
1247 struct proc_dir_entry *entry, *device_dir;
1248 struct acpi_video_device *vid_dev;
1249
1250 vid_dev = acpi_driver_data(device);
1251 if (!vid_dev)
1252 return -ENODEV;
1253
1254 device_dir = proc_mkdir(acpi_device_bid(device),
1255 vid_dev->video->dir);
1256 if (!device_dir)
1257 return -ENOMEM;
1258
1259 /* 'info' [R] */
1260 entry = proc_create_data("info", S_IRUGO, device_dir,
1261 &acpi_video_device_info_fops, acpi_driver_data(device));
1262 if (!entry)
1263 goto err_remove_dir;
1264
1265 /* 'state' [R/W] */
1266 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1267 device_dir,
1268 &acpi_video_device_state_fops,
1269 acpi_driver_data(device));
1270 if (!entry)
1271 goto err_remove_info;
1272
1273 /* 'brightness' [R/W] */
1274 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1275 device_dir,
1276 &acpi_video_device_brightness_fops,
1277 acpi_driver_data(device));
1278 if (!entry)
1279 goto err_remove_state;
1280
1281 /* 'EDID' [R] */
1282 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1283 &acpi_video_device_EDID_fops,
1284 acpi_driver_data(device));
1285 if (!entry)
1286 goto err_remove_brightness;
1287
1288 acpi_device_dir(device) = device_dir;
1289
1290 return 0;
1291
1292 err_remove_brightness:
1293 remove_proc_entry("brightness", device_dir);
1294 err_remove_state:
1295 remove_proc_entry("state", device_dir);
1296 err_remove_info:
1297 remove_proc_entry("info", device_dir);
1298 err_remove_dir:
1299 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1300 return -ENOMEM;
1301 }
1302
1303 static int acpi_video_device_remove_fs(struct acpi_device *device)
1304 {
1305 struct acpi_video_device *vid_dev;
1306 struct proc_dir_entry *device_dir;
1307
1308 vid_dev = acpi_driver_data(device);
1309 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1310 return -ENODEV;
1311
1312 device_dir = acpi_device_dir(device);
1313 if (device_dir) {
1314 remove_proc_entry("info", device_dir);
1315 remove_proc_entry("state", device_dir);
1316 remove_proc_entry("brightness", device_dir);
1317 remove_proc_entry("EDID", device_dir);
1318 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1319 acpi_device_dir(device) = NULL;
1320 }
1321
1322 return 0;
1323 }
1324
1325 /* video bus */
1326 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1327 {
1328 struct acpi_video_bus *video = seq->private;
1329
1330
1331 if (!video)
1332 goto end;
1333
1334 seq_printf(seq, "Switching heads: %s\n",
1335 video->flags.multihead ? "yes" : "no");
1336 seq_printf(seq, "Video ROM: %s\n",
1337 video->flags.rom ? "yes" : "no");
1338 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1339 video->flags.post ? "yes" : "no");
1340
1341 end:
1342 return 0;
1343 }
1344
1345 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1346 {
1347 return single_open(file, acpi_video_bus_info_seq_show,
1348 PDE(inode)->data);
1349 }
1350
1351 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1352 {
1353 struct acpi_video_bus *video = seq->private;
1354
1355
1356 if (!video)
1357 goto end;
1358
1359 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1360 seq_printf(seq, "<TODO>\n");
1361
1362 end:
1363 return 0;
1364 }
1365
1366 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1367 {
1368 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1369 }
1370
1371 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1372 {
1373 struct acpi_video_bus *video = seq->private;
1374 unsigned long long options;
1375 int status;
1376
1377
1378 if (!video)
1379 goto end;
1380
1381 status = acpi_video_bus_POST_options(video, &options);
1382 if (ACPI_SUCCESS(status)) {
1383 if (!(options & 1)) {
1384 printk(KERN_WARNING PREFIX
1385 "The motherboard VGA device is not listed as a possible POST device.\n");
1386 printk(KERN_WARNING PREFIX
1387 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1388 }
1389 printk(KERN_WARNING "%llx\n", options);
1390 seq_printf(seq, "can POST: <integrated video>");
1391 if (options & 2)
1392 seq_printf(seq, " <PCI video>");
1393 if (options & 4)
1394 seq_printf(seq, " <AGP video>");
1395 seq_putc(seq, '\n');
1396 } else
1397 seq_printf(seq, "<not supported>\n");
1398 end:
1399 return 0;
1400 }
1401
1402 static int
1403 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1404 {
1405 return single_open(file, acpi_video_bus_POST_info_seq_show,
1406 PDE(inode)->data);
1407 }
1408
1409 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1410 {
1411 struct acpi_video_bus *video = seq->private;
1412 int status;
1413 unsigned long long id;
1414
1415
1416 if (!video)
1417 goto end;
1418
1419 status = acpi_video_bus_get_POST(video, &id);
1420 if (!ACPI_SUCCESS(status)) {
1421 seq_printf(seq, "<not supported>\n");
1422 goto end;
1423 }
1424 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1425
1426 end:
1427 return 0;
1428 }
1429
1430 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1431 {
1432 struct acpi_video_bus *video = seq->private;
1433
1434
1435 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1436
1437 return 0;
1438 }
1439
1440 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1441 {
1442 return single_open(file, acpi_video_bus_POST_seq_show,
1443 PDE(inode)->data);
1444 }
1445
1446 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1447 {
1448 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1449 }
1450
1451 static ssize_t
1452 acpi_video_bus_write_POST(struct file *file,
1453 const char __user * buffer,
1454 size_t count, loff_t * data)
1455 {
1456 int status;
1457 struct seq_file *m = file->private_data;
1458 struct acpi_video_bus *video = m->private;
1459 char str[12] = { 0 };
1460 unsigned long long opt, options;
1461
1462
1463 if (!video || count + 1 > sizeof str)
1464 return -EINVAL;
1465
1466 status = acpi_video_bus_POST_options(video, &options);
1467 if (!ACPI_SUCCESS(status))
1468 return -EINVAL;
1469
1470 if (copy_from_user(str, buffer, count))
1471 return -EFAULT;
1472
1473 str[count] = 0;
1474 opt = strtoul(str, NULL, 0);
1475 if (opt > 3)
1476 return -EFAULT;
1477
1478 /* just in case an OEM 'forgot' the motherboard... */
1479 options |= 1;
1480
1481 if (options & (1ul << opt)) {
1482 status = acpi_video_bus_set_POST(video, opt);
1483 if (!ACPI_SUCCESS(status))
1484 return -EFAULT;
1485
1486 }
1487
1488 return count;
1489 }
1490
1491 static ssize_t
1492 acpi_video_bus_write_DOS(struct file *file,
1493 const char __user * buffer,
1494 size_t count, loff_t * data)
1495 {
1496 int status;
1497 struct seq_file *m = file->private_data;
1498 struct acpi_video_bus *video = m->private;
1499 char str[12] = { 0 };
1500 unsigned long opt;
1501
1502
1503 if (!video || count + 1 > sizeof str)
1504 return -EINVAL;
1505
1506 if (copy_from_user(str, buffer, count))
1507 return -EFAULT;
1508
1509 str[count] = 0;
1510 opt = strtoul(str, NULL, 0);
1511 if (opt > 7)
1512 return -EFAULT;
1513
1514 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1515
1516 if (!ACPI_SUCCESS(status))
1517 return -EFAULT;
1518
1519 return count;
1520 }
1521
1522 static int acpi_video_bus_add_fs(struct acpi_device *device)
1523 {
1524 struct acpi_video_bus *video = acpi_driver_data(device);
1525 struct proc_dir_entry *device_dir;
1526 struct proc_dir_entry *entry;
1527
1528 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1529 if (!device_dir)
1530 return -ENOMEM;
1531
1532 /* 'info' [R] */
1533 entry = proc_create_data("info", S_IRUGO, device_dir,
1534 &acpi_video_bus_info_fops,
1535 acpi_driver_data(device));
1536 if (!entry)
1537 goto err_remove_dir;
1538
1539 /* 'ROM' [R] */
1540 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1541 &acpi_video_bus_ROM_fops,
1542 acpi_driver_data(device));
1543 if (!entry)
1544 goto err_remove_info;
1545
1546 /* 'POST_info' [R] */
1547 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1548 &acpi_video_bus_POST_info_fops,
1549 acpi_driver_data(device));
1550 if (!entry)
1551 goto err_remove_rom;
1552
1553 /* 'POST' [R/W] */
1554 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1555 device_dir,
1556 &acpi_video_bus_POST_fops,
1557 acpi_driver_data(device));
1558 if (!entry)
1559 goto err_remove_post_info;
1560
1561 /* 'DOS' [R/W] */
1562 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1563 device_dir,
1564 &acpi_video_bus_DOS_fops,
1565 acpi_driver_data(device));
1566 if (!entry)
1567 goto err_remove_post;
1568
1569 video->dir = acpi_device_dir(device) = device_dir;
1570 return 0;
1571
1572 err_remove_post:
1573 remove_proc_entry("POST", device_dir);
1574 err_remove_post_info:
1575 remove_proc_entry("POST_info", device_dir);
1576 err_remove_rom:
1577 remove_proc_entry("ROM", device_dir);
1578 err_remove_info:
1579 remove_proc_entry("info", device_dir);
1580 err_remove_dir:
1581 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1582 return -ENOMEM;
1583 }
1584
1585 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1586 {
1587 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1588
1589 if (device_dir) {
1590 remove_proc_entry("info", device_dir);
1591 remove_proc_entry("ROM", device_dir);
1592 remove_proc_entry("POST_info", device_dir);
1593 remove_proc_entry("POST", device_dir);
1594 remove_proc_entry("DOS", device_dir);
1595 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1596 acpi_device_dir(device) = NULL;
1597 }
1598
1599 return 0;
1600 }
1601
1602 /* --------------------------------------------------------------------------
1603 Driver Interface
1604 -------------------------------------------------------------------------- */
1605
1606 /* device interface */
1607 static struct acpi_video_device_attrib*
1608 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1609 {
1610 struct acpi_video_enumerated_device *ids;
1611 int i;
1612
1613 for (i = 0; i < video->attached_count; i++) {
1614 ids = &video->attached_array[i];
1615 if ((ids->value.int_val & 0xffff) == device_id)
1616 return &ids->value.attrib;
1617 }
1618
1619 return NULL;
1620 }
1621
1622 static int
1623 acpi_video_bus_get_one_device(struct acpi_device *device,
1624 struct acpi_video_bus *video)
1625 {
1626 unsigned long long device_id;
1627 int status;
1628 struct acpi_video_device *data;
1629 struct acpi_video_device_attrib* attribute;
1630
1631 if (!device || !video)
1632 return -EINVAL;
1633
1634 status =
1635 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1636 if (ACPI_SUCCESS(status)) {
1637
1638 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1639 if (!data)
1640 return -ENOMEM;
1641
1642 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1643 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1644 device->driver_data = data;
1645
1646 data->device_id = device_id;
1647 data->video = video;
1648 data->dev = device;
1649
1650 attribute = acpi_video_get_device_attr(video, device_id);
1651
1652 if((attribute != NULL) && attribute->device_id_scheme) {
1653 switch (attribute->display_type) {
1654 case ACPI_VIDEO_DISPLAY_CRT:
1655 data->flags.crt = 1;
1656 break;
1657 case ACPI_VIDEO_DISPLAY_TV:
1658 data->flags.tvout = 1;
1659 break;
1660 case ACPI_VIDEO_DISPLAY_DVI:
1661 data->flags.dvi = 1;
1662 break;
1663 case ACPI_VIDEO_DISPLAY_LCD:
1664 data->flags.lcd = 1;
1665 break;
1666 default:
1667 data->flags.unknown = 1;
1668 break;
1669 }
1670 if(attribute->bios_can_detect)
1671 data->flags.bios = 1;
1672 } else
1673 data->flags.unknown = 1;
1674
1675 acpi_video_device_bind(video, data);
1676 acpi_video_device_find_cap(data);
1677
1678 status = acpi_install_notify_handler(device->handle,
1679 ACPI_DEVICE_NOTIFY,
1680 acpi_video_device_notify,
1681 data);
1682 if (ACPI_FAILURE(status)) {
1683 printk(KERN_ERR PREFIX
1684 "Error installing notify handler\n");
1685 if(data->brightness)
1686 kfree(data->brightness->levels);
1687 kfree(data->brightness);
1688 kfree(data);
1689 return -ENODEV;
1690 }
1691
1692 mutex_lock(&video->device_list_lock);
1693 list_add_tail(&data->entry, &video->video_device_list);
1694 mutex_unlock(&video->device_list_lock);
1695
1696 acpi_video_device_add_fs(device);
1697
1698 return 0;
1699 }
1700
1701 return -ENOENT;
1702 }
1703
1704 /*
1705 * Arg:
1706 * video : video bus device
1707 *
1708 * Return:
1709 * none
1710 *
1711 * Enumerate the video device list of the video bus,
1712 * bind the ids with the corresponding video devices
1713 * under the video bus.
1714 */
1715
1716 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1717 {
1718 struct acpi_video_device *dev;
1719
1720 mutex_lock(&video->device_list_lock);
1721
1722 list_for_each_entry(dev, &video->video_device_list, entry)
1723 acpi_video_device_bind(video, dev);
1724
1725 mutex_unlock(&video->device_list_lock);
1726 }
1727
1728 /*
1729 * Arg:
1730 * video : video bus device
1731 * device : video output device under the video
1732 * bus
1733 *
1734 * Return:
1735 * none
1736 *
1737 * Bind the ids with the corresponding video devices
1738 * under the video bus.
1739 */
1740
1741 static void
1742 acpi_video_device_bind(struct acpi_video_bus *video,
1743 struct acpi_video_device *device)
1744 {
1745 struct acpi_video_enumerated_device *ids;
1746 int i;
1747
1748 for (i = 0; i < video->attached_count; i++) {
1749 ids = &video->attached_array[i];
1750 if (device->device_id == (ids->value.int_val & 0xffff)) {
1751 ids->bind_info = device;
1752 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1753 }
1754 }
1755 }
1756
1757 /*
1758 * Arg:
1759 * video : video bus device
1760 *
1761 * Return:
1762 * < 0 : error
1763 *
1764 * Call _DOD to enumerate all devices attached to display adapter
1765 *
1766 */
1767
1768 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1769 {
1770 int status;
1771 int count;
1772 int i;
1773 struct acpi_video_enumerated_device *active_list;
1774 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1775 union acpi_object *dod = NULL;
1776 union acpi_object *obj;
1777
1778 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1779 if (!ACPI_SUCCESS(status)) {
1780 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1781 return status;
1782 }
1783
1784 dod = buffer.pointer;
1785 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1786 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1787 status = -EFAULT;
1788 goto out;
1789 }
1790
1791 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1792 dod->package.count));
1793
1794 active_list = kcalloc(1 + dod->package.count,
1795 sizeof(struct acpi_video_enumerated_device),
1796 GFP_KERNEL);
1797 if (!active_list) {
1798 status = -ENOMEM;
1799 goto out;
1800 }
1801
1802 count = 0;
1803 for (i = 0; i < dod->package.count; i++) {
1804 obj = &dod->package.elements[i];
1805
1806 if (obj->type != ACPI_TYPE_INTEGER) {
1807 printk(KERN_ERR PREFIX
1808 "Invalid _DOD data in element %d\n", i);
1809 continue;
1810 }
1811
1812 active_list[count].value.int_val = obj->integer.value;
1813 active_list[count].bind_info = NULL;
1814 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1815 (int)obj->integer.value));
1816 count++;
1817 }
1818
1819 kfree(video->attached_array);
1820
1821 video->attached_array = active_list;
1822 video->attached_count = count;
1823
1824 out:
1825 kfree(buffer.pointer);
1826 return status;
1827 }
1828
1829 static int
1830 acpi_video_get_next_level(struct acpi_video_device *device,
1831 u32 level_current, u32 event)
1832 {
1833 int min, max, min_above, max_below, i, l, delta = 255;
1834 max = max_below = 0;
1835 min = min_above = 255;
1836 /* Find closest level to level_current */
1837 for (i = 2; i < device->brightness->count; i++) {
1838 l = device->brightness->levels[i];
1839 if (abs(l - level_current) < abs(delta)) {
1840 delta = l - level_current;
1841 if (!delta)
1842 break;
1843 }
1844 }
1845 /* Ajust level_current to closest available level */
1846 level_current += delta;
1847 for (i = 2; i < device->brightness->count; i++) {
1848 l = device->brightness->levels[i];
1849 if (l < min)
1850 min = l;
1851 if (l > max)
1852 max = l;
1853 if (l < min_above && l > level_current)
1854 min_above = l;
1855 if (l > max_below && l < level_current)
1856 max_below = l;
1857 }
1858
1859 switch (event) {
1860 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1861 return (level_current < max) ? min_above : min;
1862 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1863 return (level_current < max) ? min_above : max;
1864 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1865 return (level_current > min) ? max_below : min;
1866 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1867 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1868 return 0;
1869 default:
1870 return level_current;
1871 }
1872 }
1873
1874 static int
1875 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1876 {
1877 unsigned long long level_current, level_next;
1878 int result = -EINVAL;
1879
1880 if (!device->brightness)
1881 goto out;
1882
1883 result = acpi_video_device_lcd_get_level_current(device,
1884 &level_current);
1885 if (result)
1886 goto out;
1887
1888 level_next = acpi_video_get_next_level(device, level_current, event);
1889
1890 result = acpi_video_device_lcd_set_level(device, level_next);
1891
1892 out:
1893 if (result)
1894 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1895
1896 return result;
1897 }
1898
1899 static int
1900 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1901 struct acpi_device *device)
1902 {
1903 int status = 0;
1904 struct acpi_device *dev;
1905
1906 acpi_video_device_enumerate(video);
1907
1908 list_for_each_entry(dev, &device->children, node) {
1909
1910 status = acpi_video_bus_get_one_device(dev, video);
1911 if (ACPI_FAILURE(status)) {
1912 printk(KERN_WARNING PREFIX
1913 "Cant attach device");
1914 continue;
1915 }
1916 }
1917 return status;
1918 }
1919
1920 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1921 {
1922 acpi_status status;
1923 struct acpi_video_bus *video;
1924
1925
1926 if (!device || !device->video)
1927 return -ENOENT;
1928
1929 video = device->video;
1930
1931 acpi_video_device_remove_fs(device->dev);
1932
1933 status = acpi_remove_notify_handler(device->dev->handle,
1934 ACPI_DEVICE_NOTIFY,
1935 acpi_video_device_notify);
1936 backlight_device_unregister(device->backlight);
1937 if (device->cdev) {
1938 sysfs_remove_link(&device->dev->dev.kobj,
1939 "thermal_cooling");
1940 sysfs_remove_link(&device->cdev->device.kobj,
1941 "device");
1942 thermal_cooling_device_unregister(device->cdev);
1943 device->cdev = NULL;
1944 }
1945 video_output_unregister(device->output_dev);
1946
1947 return 0;
1948 }
1949
1950 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1951 {
1952 int status;
1953 struct acpi_video_device *dev, *next;
1954
1955 mutex_lock(&video->device_list_lock);
1956
1957 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1958
1959 status = acpi_video_bus_put_one_device(dev);
1960 if (ACPI_FAILURE(status))
1961 printk(KERN_WARNING PREFIX
1962 "hhuuhhuu bug in acpi video driver.\n");
1963
1964 if (dev->brightness) {
1965 kfree(dev->brightness->levels);
1966 kfree(dev->brightness);
1967 }
1968 list_del(&dev->entry);
1969 kfree(dev);
1970 }
1971
1972 mutex_unlock(&video->device_list_lock);
1973
1974 return 0;
1975 }
1976
1977 /* acpi_video interface */
1978
1979 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1980 {
1981 return acpi_video_bus_DOS(video, 0, 0);
1982 }
1983
1984 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1985 {
1986 return acpi_video_bus_DOS(video, 0, 1);
1987 }
1988
1989 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1990 {
1991 struct acpi_video_bus *video = data;
1992 struct acpi_device *device = NULL;
1993 struct input_dev *input;
1994 int keycode;
1995
1996 if (!video)
1997 return;
1998
1999 device = video->device;
2000 input = video->input;
2001
2002 switch (event) {
2003 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
2004 * most likely via hotkey. */
2005 acpi_bus_generate_proc_event(device, event, 0);
2006 keycode = KEY_SWITCHVIDEOMODE;
2007 break;
2008
2009 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
2010 * connector. */
2011 acpi_video_device_enumerate(video);
2012 acpi_video_device_rebind(video);
2013 acpi_bus_generate_proc_event(device, event, 0);
2014 keycode = KEY_SWITCHVIDEOMODE;
2015 break;
2016
2017 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2018 acpi_bus_generate_proc_event(device, event, 0);
2019 keycode = KEY_SWITCHVIDEOMODE;
2020 break;
2021 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2022 acpi_bus_generate_proc_event(device, event, 0);
2023 keycode = KEY_VIDEO_NEXT;
2024 break;
2025 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2026 acpi_bus_generate_proc_event(device, event, 0);
2027 keycode = KEY_VIDEO_PREV;
2028 break;
2029
2030 default:
2031 keycode = KEY_UNKNOWN;
2032 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2033 "Unsupported event [0x%x]\n", event));
2034 break;
2035 }
2036
2037 acpi_notifier_call_chain(device, event, 0);
2038 input_report_key(input, keycode, 1);
2039 input_sync(input);
2040 input_report_key(input, keycode, 0);
2041 input_sync(input);
2042
2043 return;
2044 }
2045
2046 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2047 {
2048 struct acpi_video_device *video_device = data;
2049 struct acpi_device *device = NULL;
2050 struct acpi_video_bus *bus;
2051 struct input_dev *input;
2052 int keycode;
2053
2054 if (!video_device)
2055 return;
2056
2057 device = video_device->dev;
2058 bus = video_device->video;
2059 input = bus->input;
2060
2061 switch (event) {
2062 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
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_CYCLE;
2067 break;
2068 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
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_BRIGHTNESSUP;
2073 break;
2074 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2075 if (brightness_switch_enabled)
2076 acpi_video_switch_brightness(video_device, event);
2077 acpi_bus_generate_proc_event(device, event, 0);
2078 keycode = KEY_BRIGHTNESSDOWN;
2079 break;
2080 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2081 if (brightness_switch_enabled)
2082 acpi_video_switch_brightness(video_device, event);
2083 acpi_bus_generate_proc_event(device, event, 0);
2084 keycode = KEY_BRIGHTNESS_ZERO;
2085 break;
2086 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2087 if (brightness_switch_enabled)
2088 acpi_video_switch_brightness(video_device, event);
2089 acpi_bus_generate_proc_event(device, event, 0);
2090 keycode = KEY_DISPLAY_OFF;
2091 break;
2092 default:
2093 keycode = KEY_UNKNOWN;
2094 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2095 "Unsupported event [0x%x]\n", event));
2096 break;
2097 }
2098
2099 acpi_notifier_call_chain(device, event, 0);
2100 input_report_key(input, keycode, 1);
2101 input_sync(input);
2102 input_report_key(input, keycode, 0);
2103 input_sync(input);
2104
2105 return;
2106 }
2107
2108 static int instance;
2109 static int acpi_video_resume(struct acpi_device *device)
2110 {
2111 struct acpi_video_bus *video;
2112 struct acpi_video_device *video_device;
2113 int i;
2114
2115 if (!device || !acpi_driver_data(device))
2116 return -EINVAL;
2117
2118 video = acpi_driver_data(device);
2119
2120 for (i = 0; i < video->attached_count; i++) {
2121 video_device = video->attached_array[i].bind_info;
2122 if (video_device && video_device->backlight)
2123 acpi_video_set_brightness(video_device->backlight);
2124 }
2125 return AE_OK;
2126 }
2127
2128 static int acpi_video_bus_add(struct acpi_device *device)
2129 {
2130 acpi_status status;
2131 struct acpi_video_bus *video;
2132 struct input_dev *input;
2133 int error;
2134
2135 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2136 if (!video)
2137 return -ENOMEM;
2138
2139 /* a hack to fix the duplicate name "VID" problem on T61 */
2140 if (!strcmp(device->pnp.bus_id, "VID")) {
2141 if (instance)
2142 device->pnp.bus_id[3] = '0' + instance;
2143 instance ++;
2144 }
2145 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2146 if (!strcmp(device->pnp.bus_id, "VGA")) {
2147 if (instance)
2148 device->pnp.bus_id[3] = '0' + instance;
2149 instance++;
2150 }
2151
2152 video->device = device;
2153 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2154 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2155 device->driver_data = video;
2156
2157 acpi_video_bus_find_cap(video);
2158 error = acpi_video_bus_check(video);
2159 if (error)
2160 goto err_free_video;
2161
2162 error = acpi_video_bus_add_fs(device);
2163 if (error)
2164 goto err_free_video;
2165
2166 mutex_init(&video->device_list_lock);
2167 INIT_LIST_HEAD(&video->video_device_list);
2168
2169 acpi_video_bus_get_devices(video, device);
2170 acpi_video_bus_start_devices(video);
2171
2172 status = acpi_install_notify_handler(device->handle,
2173 ACPI_DEVICE_NOTIFY,
2174 acpi_video_bus_notify, video);
2175 if (ACPI_FAILURE(status)) {
2176 printk(KERN_ERR PREFIX
2177 "Error installing notify handler\n");
2178 error = -ENODEV;
2179 goto err_stop_video;
2180 }
2181
2182 video->input = input = input_allocate_device();
2183 if (!input) {
2184 error = -ENOMEM;
2185 goto err_uninstall_notify;
2186 }
2187
2188 snprintf(video->phys, sizeof(video->phys),
2189 "%s/video/input0", acpi_device_hid(video->device));
2190
2191 input->name = acpi_device_name(video->device);
2192 input->phys = video->phys;
2193 input->id.bustype = BUS_HOST;
2194 input->id.product = 0x06;
2195 input->dev.parent = &device->dev;
2196 input->evbit[0] = BIT(EV_KEY);
2197 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2198 set_bit(KEY_VIDEO_NEXT, input->keybit);
2199 set_bit(KEY_VIDEO_PREV, input->keybit);
2200 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2201 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2202 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2203 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2204 set_bit(KEY_DISPLAY_OFF, input->keybit);
2205 set_bit(KEY_UNKNOWN, input->keybit);
2206
2207 error = input_register_device(input);
2208 if (error)
2209 goto err_free_input_dev;
2210
2211 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2212 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2213 video->flags.multihead ? "yes" : "no",
2214 video->flags.rom ? "yes" : "no",
2215 video->flags.post ? "yes" : "no");
2216
2217 return 0;
2218
2219 err_free_input_dev:
2220 input_free_device(input);
2221 err_uninstall_notify:
2222 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2223 acpi_video_bus_notify);
2224 err_stop_video:
2225 acpi_video_bus_stop_devices(video);
2226 acpi_video_bus_put_devices(video);
2227 kfree(video->attached_array);
2228 acpi_video_bus_remove_fs(device);
2229 err_free_video:
2230 kfree(video);
2231 device->driver_data = NULL;
2232
2233 return error;
2234 }
2235
2236 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2237 {
2238 acpi_status status = 0;
2239 struct acpi_video_bus *video = NULL;
2240
2241
2242 if (!device || !acpi_driver_data(device))
2243 return -EINVAL;
2244
2245 video = acpi_driver_data(device);
2246
2247 acpi_video_bus_stop_devices(video);
2248
2249 status = acpi_remove_notify_handler(video->device->handle,
2250 ACPI_DEVICE_NOTIFY,
2251 acpi_video_bus_notify);
2252
2253 acpi_video_bus_put_devices(video);
2254 acpi_video_bus_remove_fs(device);
2255
2256 input_unregister_device(video->input);
2257 kfree(video->attached_array);
2258 kfree(video);
2259
2260 return 0;
2261 }
2262
2263 static int __init intel_opregion_present(void)
2264 {
2265 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2266 struct pci_dev *dev = NULL;
2267 u32 address;
2268
2269 for_each_pci_dev(dev) {
2270 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2271 continue;
2272 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2273 continue;
2274 pci_read_config_dword(dev, 0xfc, &address);
2275 if (!address)
2276 continue;
2277 return 1;
2278 }
2279 #endif
2280 return 0;
2281 }
2282
2283 int acpi_video_register(void)
2284 {
2285 int result = 0;
2286
2287 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2288 if (!acpi_video_dir)
2289 return -ENODEV;
2290
2291 result = acpi_bus_register_driver(&acpi_video_bus);
2292 if (result < 0) {
2293 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2294 return -ENODEV;
2295 }
2296
2297 return 0;
2298 }
2299 EXPORT_SYMBOL(acpi_video_register);
2300
2301 /*
2302 * This is kind of nasty. Hardware using Intel chipsets may require
2303 * the video opregion code to be run first in order to initialise
2304 * state before any ACPI video calls are made. To handle this we defer
2305 * registration of the video class until the opregion code has run.
2306 */
2307
2308 static int __init acpi_video_init(void)
2309 {
2310 if (intel_opregion_present())
2311 return 0;
2312
2313 return acpi_video_register();
2314 }
2315
2316 static void __exit acpi_video_exit(void)
2317 {
2318
2319 acpi_bus_unregister_driver(&acpi_video_bus);
2320
2321 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2322
2323 return;
2324 }
2325
2326 module_init(acpi_video_init);
2327 module_exit(acpi_video_exit);
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