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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[mirror_ubuntu-bionic-kernel.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 <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 static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
83
84 static const struct acpi_device_id video_device_ids[] = {
85 {ACPI_VIDEO_HID, 0},
86 {"", 0},
87 };
88 MODULE_DEVICE_TABLE(acpi, video_device_ids);
89
90 static struct acpi_driver acpi_video_bus = {
91 .name = "video",
92 .class = ACPI_VIDEO_CLASS,
93 .ids = video_device_ids,
94 .ops = {
95 .add = acpi_video_bus_add,
96 .remove = acpi_video_bus_remove,
97 .resume = acpi_video_resume,
98 .notify = acpi_video_bus_notify,
99 },
100 };
101
102 struct acpi_video_bus_flags {
103 u8 multihead:1; /* can switch video heads */
104 u8 rom:1; /* can retrieve a video rom */
105 u8 post:1; /* can configure the head to */
106 u8 reserved:5;
107 };
108
109 struct acpi_video_bus_cap {
110 u8 _DOS:1; /*Enable/Disable output switching */
111 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
112 u8 _ROM:1; /*Get ROM Data */
113 u8 _GPD:1; /*Get POST Device */
114 u8 _SPD:1; /*Set POST Device */
115 u8 _VPO:1; /*Video POST Options */
116 u8 reserved:2;
117 };
118
119 struct acpi_video_device_attrib {
120 u32 display_index:4; /* A zero-based instance of the Display */
121 u32 display_port_attachment:4; /*This field differentiates the display type */
122 u32 display_type:4; /*Describe the specific type in use */
123 u32 vendor_specific:4; /*Chipset Vendor Specific */
124 u32 bios_can_detect:1; /*BIOS can detect the device */
125 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
126 the VGA device. */
127 u32 pipe_id:3; /*For VGA multiple-head devices. */
128 u32 reserved:10; /*Must be 0 */
129 u32 device_id_scheme:1; /*Device ID Scheme */
130 };
131
132 struct acpi_video_enumerated_device {
133 union {
134 u32 int_val;
135 struct acpi_video_device_attrib attrib;
136 } value;
137 struct acpi_video_device *bind_info;
138 };
139
140 struct acpi_video_bus {
141 struct acpi_device *device;
142 u8 dos_setting;
143 struct acpi_video_enumerated_device *attached_array;
144 u8 attached_count;
145 struct acpi_video_bus_cap cap;
146 struct acpi_video_bus_flags flags;
147 struct list_head video_device_list;
148 struct mutex device_list_lock; /* protects video_device_list */
149 struct proc_dir_entry *dir;
150 struct input_dev *input;
151 char phys[32]; /* for input device */
152 };
153
154 struct acpi_video_device_flags {
155 u8 crt:1;
156 u8 lcd:1;
157 u8 tvout:1;
158 u8 dvi:1;
159 u8 bios:1;
160 u8 unknown:1;
161 u8 reserved:2;
162 };
163
164 struct acpi_video_device_cap {
165 u8 _ADR:1; /*Return the unique ID */
166 u8 _BCL:1; /*Query list of brightness control levels supported */
167 u8 _BCM:1; /*Set the brightness level */
168 u8 _BQC:1; /* Get current brightness level */
169 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
170 u8 _DDC:1; /*Return the EDID for this device */
171 u8 _DCS:1; /*Return status of output device */
172 u8 _DGS:1; /*Query graphics state */
173 u8 _DSS:1; /*Device state set */
174 };
175
176 struct acpi_video_brightness_flags {
177 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
178 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
179 u8 _BCL_use_index:1; /* levels in _BCL are index values */
180 u8 _BCM_use_index:1; /* input of _BCM is an index value */
181 u8 _BQC_use_index:1; /* _BQC returns an index value */
182 };
183
184 struct acpi_video_device_brightness {
185 int curr;
186 int count;
187 int *levels;
188 struct acpi_video_brightness_flags flags;
189 };
190
191 struct acpi_video_device {
192 unsigned long device_id;
193 struct acpi_video_device_flags flags;
194 struct acpi_video_device_cap cap;
195 struct list_head entry;
196 struct acpi_video_bus *video;
197 struct acpi_device *dev;
198 struct acpi_video_device_brightness *brightness;
199 struct backlight_device *backlight;
200 struct thermal_cooling_device *cdev;
201 struct output_device *output_dev;
202 };
203
204 /* bus */
205 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
206 static const struct file_operations acpi_video_bus_info_fops = {
207 .owner = THIS_MODULE,
208 .open = acpi_video_bus_info_open_fs,
209 .read = seq_read,
210 .llseek = seq_lseek,
211 .release = single_release,
212 };
213
214 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
215 static const struct file_operations acpi_video_bus_ROM_fops = {
216 .owner = THIS_MODULE,
217 .open = acpi_video_bus_ROM_open_fs,
218 .read = seq_read,
219 .llseek = seq_lseek,
220 .release = single_release,
221 };
222
223 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
224 struct file *file);
225 static const struct file_operations acpi_video_bus_POST_info_fops = {
226 .owner = THIS_MODULE,
227 .open = acpi_video_bus_POST_info_open_fs,
228 .read = seq_read,
229 .llseek = seq_lseek,
230 .release = single_release,
231 };
232
233 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
234 static ssize_t acpi_video_bus_write_POST(struct file *file,
235 const char __user *buffer, size_t count, loff_t *data);
236 static const struct file_operations acpi_video_bus_POST_fops = {
237 .owner = THIS_MODULE,
238 .open = acpi_video_bus_POST_open_fs,
239 .read = seq_read,
240 .write = acpi_video_bus_write_POST,
241 .llseek = seq_lseek,
242 .release = single_release,
243 };
244
245 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
246 static ssize_t acpi_video_bus_write_DOS(struct file *file,
247 const char __user *buffer, size_t count, loff_t *data);
248 static const struct file_operations acpi_video_bus_DOS_fops = {
249 .owner = THIS_MODULE,
250 .open = acpi_video_bus_DOS_open_fs,
251 .read = seq_read,
252 .write = acpi_video_bus_write_DOS,
253 .llseek = seq_lseek,
254 .release = single_release,
255 };
256
257 /* device */
258 static int acpi_video_device_info_open_fs(struct inode *inode,
259 struct file *file);
260 static const struct file_operations acpi_video_device_info_fops = {
261 .owner = THIS_MODULE,
262 .open = acpi_video_device_info_open_fs,
263 .read = seq_read,
264 .llseek = seq_lseek,
265 .release = single_release,
266 };
267
268 static int acpi_video_device_state_open_fs(struct inode *inode,
269 struct file *file);
270 static ssize_t acpi_video_device_write_state(struct file *file,
271 const char __user *buffer, size_t count, loff_t *data);
272 static const struct file_operations acpi_video_device_state_fops = {
273 .owner = THIS_MODULE,
274 .open = acpi_video_device_state_open_fs,
275 .read = seq_read,
276 .write = acpi_video_device_write_state,
277 .llseek = seq_lseek,
278 .release = single_release,
279 };
280
281 static int acpi_video_device_brightness_open_fs(struct inode *inode,
282 struct file *file);
283 static ssize_t acpi_video_device_write_brightness(struct file *file,
284 const char __user *buffer, size_t count, loff_t *data);
285 static struct file_operations acpi_video_device_brightness_fops = {
286 .owner = THIS_MODULE,
287 .open = acpi_video_device_brightness_open_fs,
288 .read = seq_read,
289 .write = acpi_video_device_write_brightness,
290 .llseek = seq_lseek,
291 .release = single_release,
292 };
293
294 static int acpi_video_device_EDID_open_fs(struct inode *inode,
295 struct file *file);
296 static const struct file_operations acpi_video_device_EDID_fops = {
297 .owner = THIS_MODULE,
298 .open = acpi_video_device_EDID_open_fs,
299 .read = seq_read,
300 .llseek = seq_lseek,
301 .release = single_release,
302 };
303
304 static const char device_decode[][30] = {
305 "motherboard VGA device",
306 "PCI VGA device",
307 "AGP VGA device",
308 "UNKNOWN",
309 };
310
311 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
312 static void acpi_video_device_rebind(struct acpi_video_bus *video);
313 static void acpi_video_device_bind(struct acpi_video_bus *video,
314 struct acpi_video_device *device);
315 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
316 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
317 int level);
318 static int acpi_video_device_lcd_get_level_current(
319 struct acpi_video_device *device,
320 unsigned long long *level);
321 static int acpi_video_get_next_level(struct acpi_video_device *device,
322 u32 level_current, u32 event);
323 static int acpi_video_switch_brightness(struct acpi_video_device *device,
324 int event);
325 static int acpi_video_device_get_state(struct acpi_video_device *device,
326 unsigned long long *state);
327 static int acpi_video_output_get(struct output_device *od);
328 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
329
330 /*backlight device sysfs support*/
331 static int acpi_video_get_brightness(struct backlight_device *bd)
332 {
333 unsigned long long cur_level;
334 int i;
335 struct acpi_video_device *vd =
336 (struct acpi_video_device *)bl_get_data(bd);
337
338 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
339 return -EINVAL;
340 for (i = 2; i < vd->brightness->count; i++) {
341 if (vd->brightness->levels[i] == cur_level)
342 /* The first two entries are special - see page 575
343 of the ACPI spec 3.0 */
344 return i-2;
345 }
346 return 0;
347 }
348
349 static int acpi_video_set_brightness(struct backlight_device *bd)
350 {
351 int request_level = bd->props.brightness + 2;
352 struct acpi_video_device *vd =
353 (struct acpi_video_device *)bl_get_data(bd);
354
355 return acpi_video_device_lcd_set_level(vd,
356 vd->brightness->levels[request_level]);
357 }
358
359 static struct backlight_ops acpi_backlight_ops = {
360 .get_brightness = acpi_video_get_brightness,
361 .update_status = acpi_video_set_brightness,
362 };
363
364 /*video output device sysfs support*/
365 static int acpi_video_output_get(struct output_device *od)
366 {
367 unsigned long long state;
368 struct acpi_video_device *vd =
369 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
370 acpi_video_device_get_state(vd, &state);
371 return (int)state;
372 }
373
374 static int acpi_video_output_set(struct output_device *od)
375 {
376 unsigned long state = od->request_state;
377 struct acpi_video_device *vd=
378 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
379 return acpi_video_device_set_state(vd, state);
380 }
381
382 static struct output_properties acpi_output_properties = {
383 .set_state = acpi_video_output_set,
384 .get_status = acpi_video_output_get,
385 };
386
387
388 /* thermal cooling device callbacks */
389 static int video_get_max_state(struct thermal_cooling_device *cdev, unsigned
390 long *state)
391 {
392 struct acpi_device *device = cdev->devdata;
393 struct acpi_video_device *video = acpi_driver_data(device);
394
395 *state = video->brightness->count - 3;
396 return 0;
397 }
398
399 static int video_get_cur_state(struct thermal_cooling_device *cdev, unsigned
400 long *state)
401 {
402 struct acpi_device *device = cdev->devdata;
403 struct acpi_video_device *video = acpi_driver_data(device);
404 unsigned long long level;
405 int offset;
406
407 if (acpi_video_device_lcd_get_level_current(video, &level))
408 return -EINVAL;
409 for (offset = 2; offset < video->brightness->count; offset++)
410 if (level == video->brightness->levels[offset]) {
411 *state = video->brightness->count - offset - 1;
412 return 0;
413 }
414
415 return -EINVAL;
416 }
417
418 static int
419 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
420 {
421 struct acpi_device *device = cdev->devdata;
422 struct acpi_video_device *video = acpi_driver_data(device);
423 int level;
424
425 if ( state >= video->brightness->count - 2)
426 return -EINVAL;
427
428 state = video->brightness->count - state;
429 level = video->brightness->levels[state -1];
430 return acpi_video_device_lcd_set_level(video, level);
431 }
432
433 static struct thermal_cooling_device_ops video_cooling_ops = {
434 .get_max_state = video_get_max_state,
435 .get_cur_state = video_get_cur_state,
436 .set_cur_state = video_set_cur_state,
437 };
438
439 /* --------------------------------------------------------------------------
440 Video Management
441 -------------------------------------------------------------------------- */
442
443 /* device */
444
445 static int
446 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
447 {
448 int status;
449
450 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
451
452 return status;
453 }
454
455 static int
456 acpi_video_device_get_state(struct acpi_video_device *device,
457 unsigned long long *state)
458 {
459 int status;
460
461 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
462
463 return status;
464 }
465
466 static int
467 acpi_video_device_set_state(struct acpi_video_device *device, int state)
468 {
469 int status;
470 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
471 struct acpi_object_list args = { 1, &arg0 };
472 unsigned long long ret;
473
474
475 arg0.integer.value = state;
476 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
477
478 return status;
479 }
480
481 static int
482 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
483 union acpi_object **levels)
484 {
485 int status;
486 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
487 union acpi_object *obj;
488
489
490 *levels = NULL;
491
492 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
493 if (!ACPI_SUCCESS(status))
494 return status;
495 obj = (union acpi_object *)buffer.pointer;
496 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
497 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
498 status = -EFAULT;
499 goto err;
500 }
501
502 *levels = obj;
503
504 return 0;
505
506 err:
507 kfree(buffer.pointer);
508
509 return status;
510 }
511
512 static int
513 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
514 {
515 int status;
516 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
517 struct acpi_object_list args = { 1, &arg0 };
518 int state;
519
520 arg0.integer.value = level;
521
522 status = acpi_evaluate_object(device->dev->handle, "_BCM",
523 &args, NULL);
524 if (ACPI_FAILURE(status)) {
525 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
526 return -EIO;
527 }
528
529 device->brightness->curr = level;
530 for (state = 2; state < device->brightness->count; state++)
531 if (level == device->brightness->levels[state]) {
532 if (device->backlight)
533 device->backlight->props.brightness = state - 2;
534 return 0;
535 }
536
537 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
538 return -EINVAL;
539 }
540
541 static int
542 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
543 unsigned long long *level)
544 {
545 acpi_status status = AE_OK;
546
547 if (device->cap._BQC || device->cap._BCQ) {
548 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
549
550 status = acpi_evaluate_integer(device->dev->handle, buf,
551 NULL, level);
552 if (ACPI_SUCCESS(status)) {
553 if (device->brightness->flags._BQC_use_index) {
554 if (device->brightness->flags._BCL_reversed)
555 *level = device->brightness->count
556 - 3 - (*level);
557 *level = device->brightness->levels[*level + 2];
558
559 }
560 device->brightness->curr = *level;
561 return 0;
562 } else {
563 /* Fixme:
564 * should we return an error or ignore this failure?
565 * dev->brightness->curr is a cached value which stores
566 * the correct current backlight level in most cases.
567 * ACPI video backlight still works w/ buggy _BQC.
568 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
569 */
570 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
571 device->cap._BQC = device->cap._BCQ = 0;
572 }
573 }
574
575 *level = device->brightness->curr;
576 return 0;
577 }
578
579 static int
580 acpi_video_device_EDID(struct acpi_video_device *device,
581 union acpi_object **edid, ssize_t length)
582 {
583 int status;
584 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
585 union acpi_object *obj;
586 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
587 struct acpi_object_list args = { 1, &arg0 };
588
589
590 *edid = NULL;
591
592 if (!device)
593 return -ENODEV;
594 if (length == 128)
595 arg0.integer.value = 1;
596 else if (length == 256)
597 arg0.integer.value = 2;
598 else
599 return -EINVAL;
600
601 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
602 if (ACPI_FAILURE(status))
603 return -ENODEV;
604
605 obj = buffer.pointer;
606
607 if (obj && obj->type == ACPI_TYPE_BUFFER)
608 *edid = obj;
609 else {
610 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
611 status = -EFAULT;
612 kfree(obj);
613 }
614
615 return status;
616 }
617
618 /* bus */
619
620 static int
621 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
622 {
623 int status;
624 unsigned long long tmp;
625 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
626 struct acpi_object_list args = { 1, &arg0 };
627
628
629 arg0.integer.value = option;
630
631 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
632 if (ACPI_SUCCESS(status))
633 status = tmp ? (-EINVAL) : (AE_OK);
634
635 return status;
636 }
637
638 static int
639 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
640 {
641 int status;
642
643 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
644
645 return status;
646 }
647
648 static int
649 acpi_video_bus_POST_options(struct acpi_video_bus *video,
650 unsigned long long *options)
651 {
652 int status;
653
654 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
655 *options &= 3;
656
657 return status;
658 }
659
660 /*
661 * Arg:
662 * video : video bus device pointer
663 * bios_flag :
664 * 0. The system BIOS should NOT automatically switch(toggle)
665 * the active display output.
666 * 1. The system BIOS should automatically switch (toggle) the
667 * active display output. No switch event.
668 * 2. The _DGS value should be locked.
669 * 3. The system BIOS should not automatically switch (toggle) the
670 * active display output, but instead generate the display switch
671 * event notify code.
672 * lcd_flag :
673 * 0. The system BIOS should automatically control the brightness level
674 * of the LCD when the power changes from AC to DC
675 * 1. The system BIOS should NOT automatically control the brightness
676 * level of the LCD when the power changes from AC to DC.
677 * Return Value:
678 * -1 wrong arg.
679 */
680
681 static int
682 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
683 {
684 acpi_integer status = 0;
685 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
686 struct acpi_object_list args = { 1, &arg0 };
687
688
689 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
690 status = -1;
691 goto Failed;
692 }
693 arg0.integer.value = (lcd_flag << 2) | bios_flag;
694 video->dos_setting = arg0.integer.value;
695 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
696
697 Failed:
698 return status;
699 }
700
701 /*
702 * Simple comparison function used to sort backlight levels.
703 */
704
705 static int
706 acpi_video_cmp_level(const void *a, const void *b)
707 {
708 return *(int *)a - *(int *)b;
709 }
710
711 /*
712 * Arg:
713 * device : video output device (LCD, CRT, ..)
714 *
715 * Return Value:
716 * Maximum brightness level
717 *
718 * Allocate and initialize device->brightness.
719 */
720
721 static int
722 acpi_video_init_brightness(struct acpi_video_device *device)
723 {
724 union acpi_object *obj = NULL;
725 int i, max_level = 0, count = 0, level_ac_battery = 0;
726 unsigned long long level, level_old;
727 union acpi_object *o;
728 struct acpi_video_device_brightness *br = NULL;
729 int result = -EINVAL;
730
731 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
732 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
733 "LCD brightness level\n"));
734 goto out;
735 }
736
737 if (obj->package.count < 2)
738 goto out;
739
740 br = kzalloc(sizeof(*br), GFP_KERNEL);
741 if (!br) {
742 printk(KERN_ERR "can't allocate memory\n");
743 result = -ENOMEM;
744 goto out;
745 }
746
747 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
748 GFP_KERNEL);
749 if (!br->levels) {
750 result = -ENOMEM;
751 goto out_free;
752 }
753
754 for (i = 0; i < obj->package.count; i++) {
755 o = (union acpi_object *)&obj->package.elements[i];
756 if (o->type != ACPI_TYPE_INTEGER) {
757 printk(KERN_ERR PREFIX "Invalid data\n");
758 continue;
759 }
760 br->levels[count] = (u32) o->integer.value;
761
762 if (br->levels[count] > max_level)
763 max_level = br->levels[count];
764 count++;
765 }
766
767 /*
768 * some buggy BIOS don't export the levels
769 * when machine is on AC/Battery in _BCL package.
770 * In this case, the first two elements in _BCL packages
771 * are also supported brightness levels that OS should take care of.
772 */
773 for (i = 2; i < count; i++) {
774 if (br->levels[i] == br->levels[0])
775 level_ac_battery++;
776 if (br->levels[i] == br->levels[1])
777 level_ac_battery++;
778 }
779
780 if (level_ac_battery < 2) {
781 level_ac_battery = 2 - level_ac_battery;
782 br->flags._BCL_no_ac_battery_levels = 1;
783 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
784 br->levels[i] = br->levels[i - level_ac_battery];
785 count += level_ac_battery;
786 } else if (level_ac_battery > 2)
787 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
788
789 /* Check if the _BCL package is in a reversed order */
790 if (max_level == br->levels[2]) {
791 br->flags._BCL_reversed = 1;
792 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
793 acpi_video_cmp_level, NULL);
794 } else if (max_level != br->levels[count - 1])
795 ACPI_ERROR((AE_INFO,
796 "Found unordered _BCL package\n"));
797
798 br->count = count;
799 device->brightness = br;
800
801 /* Check the input/output of _BQC/_BCL/_BCM */
802 if ((max_level < 100) && (max_level <= (count - 2)))
803 br->flags._BCL_use_index = 1;
804
805 /*
806 * _BCM is always consistent with _BCL,
807 * at least for all the laptops we have ever seen.
808 */
809 br->flags._BCM_use_index = br->flags._BCL_use_index;
810
811 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
812 br->curr = level_old = max_level;
813
814 if (!device->cap._BQC)
815 goto set_level;
816
817 result = acpi_video_device_lcd_get_level_current(device, &level_old);
818 if (result)
819 goto out_free_levels;
820
821 /*
822 * Set the level to maximum and check if _BQC uses indexed value
823 */
824 result = acpi_video_device_lcd_set_level(device, max_level);
825 if (result)
826 goto out_free_levels;
827
828 result = acpi_video_device_lcd_get_level_current(device, &level);
829 if (result)
830 goto out_free_levels;
831
832 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
833
834 if (!br->flags._BQC_use_index)
835 goto set_level;
836
837 if (br->flags._BCL_reversed)
838 level_old = (br->count - 1) - level_old;
839 level_old = br->levels[level_old];
840
841 set_level:
842 result = acpi_video_device_lcd_set_level(device, level_old);
843 if (result)
844 goto out_free_levels;
845
846 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
847 "found %d brightness levels\n", count - 2));
848 kfree(obj);
849 return result;
850
851 out_free_levels:
852 kfree(br->levels);
853 out_free:
854 kfree(br);
855 out:
856 device->brightness = NULL;
857 kfree(obj);
858 return result;
859 }
860
861 /*
862 * Arg:
863 * device : video output device (LCD, CRT, ..)
864 *
865 * Return Value:
866 * None
867 *
868 * Find out all required AML methods defined under the output
869 * device.
870 */
871
872 static void acpi_video_device_find_cap(struct acpi_video_device *device)
873 {
874 acpi_handle h_dummy1;
875
876
877 memset(&device->cap, 0, sizeof(device->cap));
878
879 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
880 device->cap._ADR = 1;
881 }
882 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
883 device->cap._BCL = 1;
884 }
885 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
886 device->cap._BCM = 1;
887 }
888 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
889 device->cap._BQC = 1;
890 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
891 &h_dummy1))) {
892 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
893 device->cap._BCQ = 1;
894 }
895
896 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
897 device->cap._DDC = 1;
898 }
899 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
900 device->cap._DCS = 1;
901 }
902 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
903 device->cap._DGS = 1;
904 }
905 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
906 device->cap._DSS = 1;
907 }
908
909 if (acpi_video_backlight_support()) {
910 int result;
911 static int count = 0;
912 char *name;
913
914 result = acpi_video_init_brightness(device);
915 if (result)
916 return;
917 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
918 if (!name)
919 return;
920
921 sprintf(name, "acpi_video%d", count++);
922 device->backlight = backlight_device_register(name,
923 NULL, device, &acpi_backlight_ops);
924 device->backlight->props.max_brightness = device->brightness->count-3;
925 kfree(name);
926
927 device->cdev = thermal_cooling_device_register("LCD",
928 device->dev, &video_cooling_ops);
929 if (IS_ERR(device->cdev))
930 return;
931
932 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
933 device->cdev->id);
934 result = sysfs_create_link(&device->dev->dev.kobj,
935 &device->cdev->device.kobj,
936 "thermal_cooling");
937 if (result)
938 printk(KERN_ERR PREFIX "Create sysfs link\n");
939 result = sysfs_create_link(&device->cdev->device.kobj,
940 &device->dev->dev.kobj, "device");
941 if (result)
942 printk(KERN_ERR PREFIX "Create sysfs link\n");
943
944 }
945
946 if (acpi_video_display_switch_support()) {
947
948 if (device->cap._DCS && device->cap._DSS) {
949 static int count;
950 char *name;
951 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
952 if (!name)
953 return;
954 sprintf(name, "acpi_video%d", count++);
955 device->output_dev = video_output_register(name,
956 NULL, device, &acpi_output_properties);
957 kfree(name);
958 }
959 }
960 }
961
962 /*
963 * Arg:
964 * device : video output device (VGA)
965 *
966 * Return Value:
967 * None
968 *
969 * Find out all required AML methods defined under the video bus device.
970 */
971
972 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
973 {
974 acpi_handle h_dummy1;
975
976 memset(&video->cap, 0, sizeof(video->cap));
977 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
978 video->cap._DOS = 1;
979 }
980 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
981 video->cap._DOD = 1;
982 }
983 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
984 video->cap._ROM = 1;
985 }
986 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
987 video->cap._GPD = 1;
988 }
989 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
990 video->cap._SPD = 1;
991 }
992 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
993 video->cap._VPO = 1;
994 }
995 }
996
997 /*
998 * Check whether the video bus device has required AML method to
999 * support the desired features
1000 */
1001
1002 static int acpi_video_bus_check(struct acpi_video_bus *video)
1003 {
1004 acpi_status status = -ENOENT;
1005 struct device *dev;
1006
1007 if (!video)
1008 return -EINVAL;
1009
1010 dev = acpi_get_physical_pci_device(video->device->handle);
1011 if (!dev)
1012 return -ENODEV;
1013 put_device(dev);
1014
1015 /* Since there is no HID, CID and so on for VGA driver, we have
1016 * to check well known required nodes.
1017 */
1018
1019 /* Does this device support video switching? */
1020 if (video->cap._DOS) {
1021 video->flags.multihead = 1;
1022 status = 0;
1023 }
1024
1025 /* Does this device support retrieving a video ROM? */
1026 if (video->cap._ROM) {
1027 video->flags.rom = 1;
1028 status = 0;
1029 }
1030
1031 /* Does this device support configuring which video device to POST? */
1032 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1033 video->flags.post = 1;
1034 status = 0;
1035 }
1036
1037 return status;
1038 }
1039
1040 /* --------------------------------------------------------------------------
1041 FS Interface (/proc)
1042 -------------------------------------------------------------------------- */
1043
1044 static struct proc_dir_entry *acpi_video_dir;
1045
1046 /* video devices */
1047
1048 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1049 {
1050 struct acpi_video_device *dev = seq->private;
1051
1052
1053 if (!dev)
1054 goto end;
1055
1056 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1057 seq_printf(seq, "type: ");
1058 if (dev->flags.crt)
1059 seq_printf(seq, "CRT\n");
1060 else if (dev->flags.lcd)
1061 seq_printf(seq, "LCD\n");
1062 else if (dev->flags.tvout)
1063 seq_printf(seq, "TVOUT\n");
1064 else if (dev->flags.dvi)
1065 seq_printf(seq, "DVI\n");
1066 else
1067 seq_printf(seq, "UNKNOWN\n");
1068
1069 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1070
1071 end:
1072 return 0;
1073 }
1074
1075 static int
1076 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1077 {
1078 return single_open(file, acpi_video_device_info_seq_show,
1079 PDE(inode)->data);
1080 }
1081
1082 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1083 {
1084 int status;
1085 struct acpi_video_device *dev = seq->private;
1086 unsigned long long state;
1087
1088
1089 if (!dev)
1090 goto end;
1091
1092 status = acpi_video_device_get_state(dev, &state);
1093 seq_printf(seq, "state: ");
1094 if (ACPI_SUCCESS(status))
1095 seq_printf(seq, "0x%02llx\n", state);
1096 else
1097 seq_printf(seq, "<not supported>\n");
1098
1099 status = acpi_video_device_query(dev, &state);
1100 seq_printf(seq, "query: ");
1101 if (ACPI_SUCCESS(status))
1102 seq_printf(seq, "0x%02llx\n", state);
1103 else
1104 seq_printf(seq, "<not supported>\n");
1105
1106 end:
1107 return 0;
1108 }
1109
1110 static int
1111 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1112 {
1113 return single_open(file, acpi_video_device_state_seq_show,
1114 PDE(inode)->data);
1115 }
1116
1117 static ssize_t
1118 acpi_video_device_write_state(struct file *file,
1119 const char __user * buffer,
1120 size_t count, loff_t * data)
1121 {
1122 int status;
1123 struct seq_file *m = file->private_data;
1124 struct acpi_video_device *dev = m->private;
1125 char str[12] = { 0 };
1126 u32 state = 0;
1127
1128
1129 if (!dev || count + 1 > sizeof str)
1130 return -EINVAL;
1131
1132 if (copy_from_user(str, buffer, count))
1133 return -EFAULT;
1134
1135 str[count] = 0;
1136 state = simple_strtoul(str, NULL, 0);
1137 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1138
1139 status = acpi_video_device_set_state(dev, state);
1140
1141 if (status)
1142 return -EFAULT;
1143
1144 return count;
1145 }
1146
1147 static int
1148 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1149 {
1150 struct acpi_video_device *dev = seq->private;
1151 int i;
1152
1153
1154 if (!dev || !dev->brightness) {
1155 seq_printf(seq, "<not supported>\n");
1156 return 0;
1157 }
1158
1159 seq_printf(seq, "levels: ");
1160 for (i = 2; i < dev->brightness->count; i++)
1161 seq_printf(seq, " %d", dev->brightness->levels[i]);
1162 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1163
1164 return 0;
1165 }
1166
1167 static int
1168 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1169 {
1170 return single_open(file, acpi_video_device_brightness_seq_show,
1171 PDE(inode)->data);
1172 }
1173
1174 static ssize_t
1175 acpi_video_device_write_brightness(struct file *file,
1176 const char __user * buffer,
1177 size_t count, loff_t * data)
1178 {
1179 struct seq_file *m = file->private_data;
1180 struct acpi_video_device *dev = m->private;
1181 char str[5] = { 0 };
1182 unsigned int level = 0;
1183 int i;
1184
1185
1186 if (!dev || !dev->brightness || count + 1 > sizeof str)
1187 return -EINVAL;
1188
1189 if (copy_from_user(str, buffer, count))
1190 return -EFAULT;
1191
1192 str[count] = 0;
1193 level = simple_strtoul(str, NULL, 0);
1194
1195 if (level > 100)
1196 return -EFAULT;
1197
1198 /* validate through the list of available levels */
1199 for (i = 2; i < dev->brightness->count; i++)
1200 if (level == dev->brightness->levels[i]) {
1201 if (!acpi_video_device_lcd_set_level(dev, level))
1202 return count;
1203 break;
1204 }
1205
1206 return -EINVAL;
1207 }
1208
1209 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1210 {
1211 struct acpi_video_device *dev = seq->private;
1212 int status;
1213 int i;
1214 union acpi_object *edid = NULL;
1215
1216
1217 if (!dev)
1218 goto out;
1219
1220 status = acpi_video_device_EDID(dev, &edid, 128);
1221 if (ACPI_FAILURE(status)) {
1222 status = acpi_video_device_EDID(dev, &edid, 256);
1223 }
1224
1225 if (ACPI_FAILURE(status)) {
1226 goto out;
1227 }
1228
1229 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1230 for (i = 0; i < edid->buffer.length; i++)
1231 seq_putc(seq, edid->buffer.pointer[i]);
1232 }
1233
1234 out:
1235 if (!edid)
1236 seq_printf(seq, "<not supported>\n");
1237 else
1238 kfree(edid);
1239
1240 return 0;
1241 }
1242
1243 static int
1244 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1245 {
1246 return single_open(file, acpi_video_device_EDID_seq_show,
1247 PDE(inode)->data);
1248 }
1249
1250 static int acpi_video_device_add_fs(struct acpi_device *device)
1251 {
1252 struct proc_dir_entry *entry, *device_dir;
1253 struct acpi_video_device *vid_dev;
1254
1255 vid_dev = acpi_driver_data(device);
1256 if (!vid_dev)
1257 return -ENODEV;
1258
1259 device_dir = proc_mkdir(acpi_device_bid(device),
1260 vid_dev->video->dir);
1261 if (!device_dir)
1262 return -ENOMEM;
1263
1264 /* 'info' [R] */
1265 entry = proc_create_data("info", S_IRUGO, device_dir,
1266 &acpi_video_device_info_fops, acpi_driver_data(device));
1267 if (!entry)
1268 goto err_remove_dir;
1269
1270 /* 'state' [R/W] */
1271 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1272 device_dir,
1273 &acpi_video_device_state_fops,
1274 acpi_driver_data(device));
1275 if (!entry)
1276 goto err_remove_info;
1277
1278 /* 'brightness' [R/W] */
1279 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1280 device_dir,
1281 &acpi_video_device_brightness_fops,
1282 acpi_driver_data(device));
1283 if (!entry)
1284 goto err_remove_state;
1285
1286 /* 'EDID' [R] */
1287 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1288 &acpi_video_device_EDID_fops,
1289 acpi_driver_data(device));
1290 if (!entry)
1291 goto err_remove_brightness;
1292
1293 acpi_device_dir(device) = device_dir;
1294
1295 return 0;
1296
1297 err_remove_brightness:
1298 remove_proc_entry("brightness", device_dir);
1299 err_remove_state:
1300 remove_proc_entry("state", device_dir);
1301 err_remove_info:
1302 remove_proc_entry("info", device_dir);
1303 err_remove_dir:
1304 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1305 return -ENOMEM;
1306 }
1307
1308 static int acpi_video_device_remove_fs(struct acpi_device *device)
1309 {
1310 struct acpi_video_device *vid_dev;
1311 struct proc_dir_entry *device_dir;
1312
1313 vid_dev = acpi_driver_data(device);
1314 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1315 return -ENODEV;
1316
1317 device_dir = acpi_device_dir(device);
1318 if (device_dir) {
1319 remove_proc_entry("info", device_dir);
1320 remove_proc_entry("state", device_dir);
1321 remove_proc_entry("brightness", device_dir);
1322 remove_proc_entry("EDID", device_dir);
1323 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1324 acpi_device_dir(device) = NULL;
1325 }
1326
1327 return 0;
1328 }
1329
1330 /* video bus */
1331 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1332 {
1333 struct acpi_video_bus *video = seq->private;
1334
1335
1336 if (!video)
1337 goto end;
1338
1339 seq_printf(seq, "Switching heads: %s\n",
1340 video->flags.multihead ? "yes" : "no");
1341 seq_printf(seq, "Video ROM: %s\n",
1342 video->flags.rom ? "yes" : "no");
1343 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1344 video->flags.post ? "yes" : "no");
1345
1346 end:
1347 return 0;
1348 }
1349
1350 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1351 {
1352 return single_open(file, acpi_video_bus_info_seq_show,
1353 PDE(inode)->data);
1354 }
1355
1356 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1357 {
1358 struct acpi_video_bus *video = seq->private;
1359
1360
1361 if (!video)
1362 goto end;
1363
1364 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1365 seq_printf(seq, "<TODO>\n");
1366
1367 end:
1368 return 0;
1369 }
1370
1371 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1372 {
1373 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1374 }
1375
1376 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1377 {
1378 struct acpi_video_bus *video = seq->private;
1379 unsigned long long options;
1380 int status;
1381
1382
1383 if (!video)
1384 goto end;
1385
1386 status = acpi_video_bus_POST_options(video, &options);
1387 if (ACPI_SUCCESS(status)) {
1388 if (!(options & 1)) {
1389 printk(KERN_WARNING PREFIX
1390 "The motherboard VGA device is not listed as a possible POST device.\n");
1391 printk(KERN_WARNING PREFIX
1392 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1393 }
1394 printk(KERN_WARNING "%llx\n", options);
1395 seq_printf(seq, "can POST: <integrated video>");
1396 if (options & 2)
1397 seq_printf(seq, " <PCI video>");
1398 if (options & 4)
1399 seq_printf(seq, " <AGP video>");
1400 seq_putc(seq, '\n');
1401 } else
1402 seq_printf(seq, "<not supported>\n");
1403 end:
1404 return 0;
1405 }
1406
1407 static int
1408 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1409 {
1410 return single_open(file, acpi_video_bus_POST_info_seq_show,
1411 PDE(inode)->data);
1412 }
1413
1414 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1415 {
1416 struct acpi_video_bus *video = seq->private;
1417 int status;
1418 unsigned long long id;
1419
1420
1421 if (!video)
1422 goto end;
1423
1424 status = acpi_video_bus_get_POST(video, &id);
1425 if (!ACPI_SUCCESS(status)) {
1426 seq_printf(seq, "<not supported>\n");
1427 goto end;
1428 }
1429 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1430
1431 end:
1432 return 0;
1433 }
1434
1435 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1436 {
1437 struct acpi_video_bus *video = seq->private;
1438
1439
1440 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1441
1442 return 0;
1443 }
1444
1445 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1446 {
1447 return single_open(file, acpi_video_bus_POST_seq_show,
1448 PDE(inode)->data);
1449 }
1450
1451 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1452 {
1453 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1454 }
1455
1456 static ssize_t
1457 acpi_video_bus_write_POST(struct file *file,
1458 const char __user * buffer,
1459 size_t count, loff_t * data)
1460 {
1461 int status;
1462 struct seq_file *m = file->private_data;
1463 struct acpi_video_bus *video = m->private;
1464 char str[12] = { 0 };
1465 unsigned long long opt, options;
1466
1467
1468 if (!video || count + 1 > sizeof str)
1469 return -EINVAL;
1470
1471 status = acpi_video_bus_POST_options(video, &options);
1472 if (!ACPI_SUCCESS(status))
1473 return -EINVAL;
1474
1475 if (copy_from_user(str, buffer, count))
1476 return -EFAULT;
1477
1478 str[count] = 0;
1479 opt = strtoul(str, NULL, 0);
1480 if (opt > 3)
1481 return -EFAULT;
1482
1483 /* just in case an OEM 'forgot' the motherboard... */
1484 options |= 1;
1485
1486 if (options & (1ul << opt)) {
1487 status = acpi_video_bus_set_POST(video, opt);
1488 if (!ACPI_SUCCESS(status))
1489 return -EFAULT;
1490
1491 }
1492
1493 return count;
1494 }
1495
1496 static ssize_t
1497 acpi_video_bus_write_DOS(struct file *file,
1498 const char __user * buffer,
1499 size_t count, loff_t * data)
1500 {
1501 int status;
1502 struct seq_file *m = file->private_data;
1503 struct acpi_video_bus *video = m->private;
1504 char str[12] = { 0 };
1505 unsigned long opt;
1506
1507
1508 if (!video || count + 1 > sizeof str)
1509 return -EINVAL;
1510
1511 if (copy_from_user(str, buffer, count))
1512 return -EFAULT;
1513
1514 str[count] = 0;
1515 opt = strtoul(str, NULL, 0);
1516 if (opt > 7)
1517 return -EFAULT;
1518
1519 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1520
1521 if (!ACPI_SUCCESS(status))
1522 return -EFAULT;
1523
1524 return count;
1525 }
1526
1527 static int acpi_video_bus_add_fs(struct acpi_device *device)
1528 {
1529 struct acpi_video_bus *video = acpi_driver_data(device);
1530 struct proc_dir_entry *device_dir;
1531 struct proc_dir_entry *entry;
1532
1533 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1534 if (!device_dir)
1535 return -ENOMEM;
1536
1537 /* 'info' [R] */
1538 entry = proc_create_data("info", S_IRUGO, device_dir,
1539 &acpi_video_bus_info_fops,
1540 acpi_driver_data(device));
1541 if (!entry)
1542 goto err_remove_dir;
1543
1544 /* 'ROM' [R] */
1545 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1546 &acpi_video_bus_ROM_fops,
1547 acpi_driver_data(device));
1548 if (!entry)
1549 goto err_remove_info;
1550
1551 /* 'POST_info' [R] */
1552 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1553 &acpi_video_bus_POST_info_fops,
1554 acpi_driver_data(device));
1555 if (!entry)
1556 goto err_remove_rom;
1557
1558 /* 'POST' [R/W] */
1559 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1560 device_dir,
1561 &acpi_video_bus_POST_fops,
1562 acpi_driver_data(device));
1563 if (!entry)
1564 goto err_remove_post_info;
1565
1566 /* 'DOS' [R/W] */
1567 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1568 device_dir,
1569 &acpi_video_bus_DOS_fops,
1570 acpi_driver_data(device));
1571 if (!entry)
1572 goto err_remove_post;
1573
1574 video->dir = acpi_device_dir(device) = device_dir;
1575 return 0;
1576
1577 err_remove_post:
1578 remove_proc_entry("POST", device_dir);
1579 err_remove_post_info:
1580 remove_proc_entry("POST_info", device_dir);
1581 err_remove_rom:
1582 remove_proc_entry("ROM", device_dir);
1583 err_remove_info:
1584 remove_proc_entry("info", device_dir);
1585 err_remove_dir:
1586 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1587 return -ENOMEM;
1588 }
1589
1590 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1591 {
1592 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1593
1594 if (device_dir) {
1595 remove_proc_entry("info", device_dir);
1596 remove_proc_entry("ROM", device_dir);
1597 remove_proc_entry("POST_info", device_dir);
1598 remove_proc_entry("POST", device_dir);
1599 remove_proc_entry("DOS", device_dir);
1600 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1601 acpi_device_dir(device) = NULL;
1602 }
1603
1604 return 0;
1605 }
1606
1607 /* --------------------------------------------------------------------------
1608 Driver Interface
1609 -------------------------------------------------------------------------- */
1610
1611 /* device interface */
1612 static struct acpi_video_device_attrib*
1613 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1614 {
1615 struct acpi_video_enumerated_device *ids;
1616 int i;
1617
1618 for (i = 0; i < video->attached_count; i++) {
1619 ids = &video->attached_array[i];
1620 if ((ids->value.int_val & 0xffff) == device_id)
1621 return &ids->value.attrib;
1622 }
1623
1624 return NULL;
1625 }
1626
1627 static int
1628 acpi_video_bus_get_one_device(struct acpi_device *device,
1629 struct acpi_video_bus *video)
1630 {
1631 unsigned long long device_id;
1632 int status;
1633 struct acpi_video_device *data;
1634 struct acpi_video_device_attrib* attribute;
1635
1636 if (!device || !video)
1637 return -EINVAL;
1638
1639 status =
1640 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1641 if (ACPI_SUCCESS(status)) {
1642
1643 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1644 if (!data)
1645 return -ENOMEM;
1646
1647 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1648 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1649 device->driver_data = data;
1650
1651 data->device_id = device_id;
1652 data->video = video;
1653 data->dev = device;
1654
1655 attribute = acpi_video_get_device_attr(video, device_id);
1656
1657 if((attribute != NULL) && attribute->device_id_scheme) {
1658 switch (attribute->display_type) {
1659 case ACPI_VIDEO_DISPLAY_CRT:
1660 data->flags.crt = 1;
1661 break;
1662 case ACPI_VIDEO_DISPLAY_TV:
1663 data->flags.tvout = 1;
1664 break;
1665 case ACPI_VIDEO_DISPLAY_DVI:
1666 data->flags.dvi = 1;
1667 break;
1668 case ACPI_VIDEO_DISPLAY_LCD:
1669 data->flags.lcd = 1;
1670 break;
1671 default:
1672 data->flags.unknown = 1;
1673 break;
1674 }
1675 if(attribute->bios_can_detect)
1676 data->flags.bios = 1;
1677 } else
1678 data->flags.unknown = 1;
1679
1680 acpi_video_device_bind(video, data);
1681 acpi_video_device_find_cap(data);
1682
1683 status = acpi_install_notify_handler(device->handle,
1684 ACPI_DEVICE_NOTIFY,
1685 acpi_video_device_notify,
1686 data);
1687 if (ACPI_FAILURE(status)) {
1688 printk(KERN_ERR PREFIX
1689 "Error installing notify handler\n");
1690 if(data->brightness)
1691 kfree(data->brightness->levels);
1692 kfree(data->brightness);
1693 kfree(data);
1694 return -ENODEV;
1695 }
1696
1697 mutex_lock(&video->device_list_lock);
1698 list_add_tail(&data->entry, &video->video_device_list);
1699 mutex_unlock(&video->device_list_lock);
1700
1701 acpi_video_device_add_fs(device);
1702
1703 return 0;
1704 }
1705
1706 return -ENOENT;
1707 }
1708
1709 /*
1710 * Arg:
1711 * video : video bus device
1712 *
1713 * Return:
1714 * none
1715 *
1716 * Enumerate the video device list of the video bus,
1717 * bind the ids with the corresponding video devices
1718 * under the video bus.
1719 */
1720
1721 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1722 {
1723 struct acpi_video_device *dev;
1724
1725 mutex_lock(&video->device_list_lock);
1726
1727 list_for_each_entry(dev, &video->video_device_list, entry)
1728 acpi_video_device_bind(video, dev);
1729
1730 mutex_unlock(&video->device_list_lock);
1731 }
1732
1733 /*
1734 * Arg:
1735 * video : video bus device
1736 * device : video output device under the video
1737 * bus
1738 *
1739 * Return:
1740 * none
1741 *
1742 * Bind the ids with the corresponding video devices
1743 * under the video bus.
1744 */
1745
1746 static void
1747 acpi_video_device_bind(struct acpi_video_bus *video,
1748 struct acpi_video_device *device)
1749 {
1750 struct acpi_video_enumerated_device *ids;
1751 int i;
1752
1753 for (i = 0; i < video->attached_count; i++) {
1754 ids = &video->attached_array[i];
1755 if (device->device_id == (ids->value.int_val & 0xffff)) {
1756 ids->bind_info = device;
1757 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1758 }
1759 }
1760 }
1761
1762 /*
1763 * Arg:
1764 * video : video bus device
1765 *
1766 * Return:
1767 * < 0 : error
1768 *
1769 * Call _DOD to enumerate all devices attached to display adapter
1770 *
1771 */
1772
1773 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1774 {
1775 int status;
1776 int count;
1777 int i;
1778 struct acpi_video_enumerated_device *active_list;
1779 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1780 union acpi_object *dod = NULL;
1781 union acpi_object *obj;
1782
1783 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1784 if (!ACPI_SUCCESS(status)) {
1785 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1786 return status;
1787 }
1788
1789 dod = buffer.pointer;
1790 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1791 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1792 status = -EFAULT;
1793 goto out;
1794 }
1795
1796 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1797 dod->package.count));
1798
1799 active_list = kcalloc(1 + dod->package.count,
1800 sizeof(struct acpi_video_enumerated_device),
1801 GFP_KERNEL);
1802 if (!active_list) {
1803 status = -ENOMEM;
1804 goto out;
1805 }
1806
1807 count = 0;
1808 for (i = 0; i < dod->package.count; i++) {
1809 obj = &dod->package.elements[i];
1810
1811 if (obj->type != ACPI_TYPE_INTEGER) {
1812 printk(KERN_ERR PREFIX
1813 "Invalid _DOD data in element %d\n", i);
1814 continue;
1815 }
1816
1817 active_list[count].value.int_val = obj->integer.value;
1818 active_list[count].bind_info = NULL;
1819 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1820 (int)obj->integer.value));
1821 count++;
1822 }
1823
1824 kfree(video->attached_array);
1825
1826 video->attached_array = active_list;
1827 video->attached_count = count;
1828
1829 out:
1830 kfree(buffer.pointer);
1831 return status;
1832 }
1833
1834 static int
1835 acpi_video_get_next_level(struct acpi_video_device *device,
1836 u32 level_current, u32 event)
1837 {
1838 int min, max, min_above, max_below, i, l, delta = 255;
1839 max = max_below = 0;
1840 min = min_above = 255;
1841 /* Find closest level to level_current */
1842 for (i = 2; i < device->brightness->count; i++) {
1843 l = device->brightness->levels[i];
1844 if (abs(l - level_current) < abs(delta)) {
1845 delta = l - level_current;
1846 if (!delta)
1847 break;
1848 }
1849 }
1850 /* Ajust level_current to closest available level */
1851 level_current += delta;
1852 for (i = 2; i < device->brightness->count; i++) {
1853 l = device->brightness->levels[i];
1854 if (l < min)
1855 min = l;
1856 if (l > max)
1857 max = l;
1858 if (l < min_above && l > level_current)
1859 min_above = l;
1860 if (l > max_below && l < level_current)
1861 max_below = l;
1862 }
1863
1864 switch (event) {
1865 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1866 return (level_current < max) ? min_above : min;
1867 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1868 return (level_current < max) ? min_above : max;
1869 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1870 return (level_current > min) ? max_below : min;
1871 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1872 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1873 return 0;
1874 default:
1875 return level_current;
1876 }
1877 }
1878
1879 static int
1880 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1881 {
1882 unsigned long long level_current, level_next;
1883 int result = -EINVAL;
1884
1885 if (!device->brightness)
1886 goto out;
1887
1888 result = acpi_video_device_lcd_get_level_current(device,
1889 &level_current);
1890 if (result)
1891 goto out;
1892
1893 level_next = acpi_video_get_next_level(device, level_current, event);
1894
1895 result = acpi_video_device_lcd_set_level(device, level_next);
1896
1897 out:
1898 if (result)
1899 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1900
1901 return result;
1902 }
1903
1904 static int
1905 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1906 struct acpi_device *device)
1907 {
1908 int status = 0;
1909 struct acpi_device *dev;
1910
1911 acpi_video_device_enumerate(video);
1912
1913 list_for_each_entry(dev, &device->children, node) {
1914
1915 status = acpi_video_bus_get_one_device(dev, video);
1916 if (ACPI_FAILURE(status)) {
1917 printk(KERN_WARNING PREFIX
1918 "Cant attach device");
1919 continue;
1920 }
1921 }
1922 return status;
1923 }
1924
1925 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1926 {
1927 acpi_status status;
1928 struct acpi_video_bus *video;
1929
1930
1931 if (!device || !device->video)
1932 return -ENOENT;
1933
1934 video = device->video;
1935
1936 acpi_video_device_remove_fs(device->dev);
1937
1938 status = acpi_remove_notify_handler(device->dev->handle,
1939 ACPI_DEVICE_NOTIFY,
1940 acpi_video_device_notify);
1941 backlight_device_unregister(device->backlight);
1942 if (device->cdev) {
1943 sysfs_remove_link(&device->dev->dev.kobj,
1944 "thermal_cooling");
1945 sysfs_remove_link(&device->cdev->device.kobj,
1946 "device");
1947 thermal_cooling_device_unregister(device->cdev);
1948 device->cdev = NULL;
1949 }
1950 video_output_unregister(device->output_dev);
1951
1952 return 0;
1953 }
1954
1955 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1956 {
1957 int status;
1958 struct acpi_video_device *dev, *next;
1959
1960 mutex_lock(&video->device_list_lock);
1961
1962 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1963
1964 status = acpi_video_bus_put_one_device(dev);
1965 if (ACPI_FAILURE(status))
1966 printk(KERN_WARNING PREFIX
1967 "hhuuhhuu bug in acpi video driver.\n");
1968
1969 if (dev->brightness) {
1970 kfree(dev->brightness->levels);
1971 kfree(dev->brightness);
1972 }
1973 list_del(&dev->entry);
1974 kfree(dev);
1975 }
1976
1977 mutex_unlock(&video->device_list_lock);
1978
1979 return 0;
1980 }
1981
1982 /* acpi_video interface */
1983
1984 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1985 {
1986 return acpi_video_bus_DOS(video, 0, 0);
1987 }
1988
1989 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1990 {
1991 return acpi_video_bus_DOS(video, 0, 1);
1992 }
1993
1994 static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
1995 {
1996 struct acpi_video_bus *video = acpi_driver_data(device);
1997 struct input_dev *input;
1998 int keycode;
1999
2000 if (!video)
2001 return;
2002
2003 input = video->input;
2004
2005 switch (event) {
2006 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
2007 * most likely via hotkey. */
2008 acpi_bus_generate_proc_event(device, event, 0);
2009 keycode = KEY_SWITCHVIDEOMODE;
2010 break;
2011
2012 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
2013 * connector. */
2014 acpi_video_device_enumerate(video);
2015 acpi_video_device_rebind(video);
2016 acpi_bus_generate_proc_event(device, event, 0);
2017 keycode = KEY_SWITCHVIDEOMODE;
2018 break;
2019
2020 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2021 acpi_bus_generate_proc_event(device, event, 0);
2022 keycode = KEY_SWITCHVIDEOMODE;
2023 break;
2024 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2025 acpi_bus_generate_proc_event(device, event, 0);
2026 keycode = KEY_VIDEO_NEXT;
2027 break;
2028 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2029 acpi_bus_generate_proc_event(device, event, 0);
2030 keycode = KEY_VIDEO_PREV;
2031 break;
2032
2033 default:
2034 keycode = KEY_UNKNOWN;
2035 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2036 "Unsupported event [0x%x]\n", event));
2037 break;
2038 }
2039
2040 acpi_notifier_call_chain(device, event, 0);
2041 input_report_key(input, keycode, 1);
2042 input_sync(input);
2043 input_report_key(input, keycode, 0);
2044 input_sync(input);
2045
2046 return;
2047 }
2048
2049 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2050 {
2051 struct acpi_video_device *video_device = data;
2052 struct acpi_device *device = NULL;
2053 struct acpi_video_bus *bus;
2054 struct input_dev *input;
2055 int keycode;
2056
2057 if (!video_device)
2058 return;
2059
2060 device = video_device->dev;
2061 bus = video_device->video;
2062 input = bus->input;
2063
2064 switch (event) {
2065 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
2066 if (brightness_switch_enabled)
2067 acpi_video_switch_brightness(video_device, event);
2068 acpi_bus_generate_proc_event(device, event, 0);
2069 keycode = KEY_BRIGHTNESS_CYCLE;
2070 break;
2071 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
2072 if (brightness_switch_enabled)
2073 acpi_video_switch_brightness(video_device, event);
2074 acpi_bus_generate_proc_event(device, event, 0);
2075 keycode = KEY_BRIGHTNESSUP;
2076 break;
2077 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2078 if (brightness_switch_enabled)
2079 acpi_video_switch_brightness(video_device, event);
2080 acpi_bus_generate_proc_event(device, event, 0);
2081 keycode = KEY_BRIGHTNESSDOWN;
2082 break;
2083 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2084 if (brightness_switch_enabled)
2085 acpi_video_switch_brightness(video_device, event);
2086 acpi_bus_generate_proc_event(device, event, 0);
2087 keycode = KEY_BRIGHTNESS_ZERO;
2088 break;
2089 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2090 if (brightness_switch_enabled)
2091 acpi_video_switch_brightness(video_device, event);
2092 acpi_bus_generate_proc_event(device, event, 0);
2093 keycode = KEY_DISPLAY_OFF;
2094 break;
2095 default:
2096 keycode = KEY_UNKNOWN;
2097 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2098 "Unsupported event [0x%x]\n", event));
2099 break;
2100 }
2101
2102 acpi_notifier_call_chain(device, event, 0);
2103 input_report_key(input, keycode, 1);
2104 input_sync(input);
2105 input_report_key(input, keycode, 0);
2106 input_sync(input);
2107
2108 return;
2109 }
2110
2111 static int instance;
2112 static int acpi_video_resume(struct acpi_device *device)
2113 {
2114 struct acpi_video_bus *video;
2115 struct acpi_video_device *video_device;
2116 int i;
2117
2118 if (!device || !acpi_driver_data(device))
2119 return -EINVAL;
2120
2121 video = acpi_driver_data(device);
2122
2123 for (i = 0; i < video->attached_count; i++) {
2124 video_device = video->attached_array[i].bind_info;
2125 if (video_device && video_device->backlight)
2126 acpi_video_set_brightness(video_device->backlight);
2127 }
2128 return AE_OK;
2129 }
2130
2131 static int acpi_video_bus_add(struct acpi_device *device)
2132 {
2133 struct acpi_video_bus *video;
2134 struct input_dev *input;
2135 int error;
2136
2137 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2138 if (!video)
2139 return -ENOMEM;
2140
2141 /* a hack to fix the duplicate name "VID" problem on T61 */
2142 if (!strcmp(device->pnp.bus_id, "VID")) {
2143 if (instance)
2144 device->pnp.bus_id[3] = '0' + instance;
2145 instance ++;
2146 }
2147 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2148 if (!strcmp(device->pnp.bus_id, "VGA")) {
2149 if (instance)
2150 device->pnp.bus_id[3] = '0' + instance;
2151 instance++;
2152 }
2153
2154 video->device = device;
2155 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2156 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2157 device->driver_data = video;
2158
2159 acpi_video_bus_find_cap(video);
2160 error = acpi_video_bus_check(video);
2161 if (error)
2162 goto err_free_video;
2163
2164 error = acpi_video_bus_add_fs(device);
2165 if (error)
2166 goto err_free_video;
2167
2168 mutex_init(&video->device_list_lock);
2169 INIT_LIST_HEAD(&video->video_device_list);
2170
2171 acpi_video_bus_get_devices(video, device);
2172 acpi_video_bus_start_devices(video);
2173
2174 video->input = input = input_allocate_device();
2175 if (!input) {
2176 error = -ENOMEM;
2177 goto err_stop_video;
2178 }
2179
2180 snprintf(video->phys, sizeof(video->phys),
2181 "%s/video/input0", acpi_device_hid(video->device));
2182
2183 input->name = acpi_device_name(video->device);
2184 input->phys = video->phys;
2185 input->id.bustype = BUS_HOST;
2186 input->id.product = 0x06;
2187 input->dev.parent = &device->dev;
2188 input->evbit[0] = BIT(EV_KEY);
2189 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2190 set_bit(KEY_VIDEO_NEXT, input->keybit);
2191 set_bit(KEY_VIDEO_PREV, input->keybit);
2192 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2193 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2194 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2195 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2196 set_bit(KEY_DISPLAY_OFF, input->keybit);
2197 set_bit(KEY_UNKNOWN, input->keybit);
2198
2199 error = input_register_device(input);
2200 if (error)
2201 goto err_free_input_dev;
2202
2203 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2204 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2205 video->flags.multihead ? "yes" : "no",
2206 video->flags.rom ? "yes" : "no",
2207 video->flags.post ? "yes" : "no");
2208
2209 return 0;
2210
2211 err_free_input_dev:
2212 input_free_device(input);
2213 err_stop_video:
2214 acpi_video_bus_stop_devices(video);
2215 acpi_video_bus_put_devices(video);
2216 kfree(video->attached_array);
2217 acpi_video_bus_remove_fs(device);
2218 err_free_video:
2219 kfree(video);
2220 device->driver_data = NULL;
2221
2222 return error;
2223 }
2224
2225 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2226 {
2227 struct acpi_video_bus *video = NULL;
2228
2229
2230 if (!device || !acpi_driver_data(device))
2231 return -EINVAL;
2232
2233 video = acpi_driver_data(device);
2234
2235 acpi_video_bus_stop_devices(video);
2236 acpi_video_bus_put_devices(video);
2237 acpi_video_bus_remove_fs(device);
2238
2239 input_unregister_device(video->input);
2240 kfree(video->attached_array);
2241 kfree(video);
2242
2243 return 0;
2244 }
2245
2246 static int __init intel_opregion_present(void)
2247 {
2248 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2249 struct pci_dev *dev = NULL;
2250 u32 address;
2251
2252 for_each_pci_dev(dev) {
2253 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2254 continue;
2255 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2256 continue;
2257 pci_read_config_dword(dev, 0xfc, &address);
2258 if (!address)
2259 continue;
2260 return 1;
2261 }
2262 #endif
2263 return 0;
2264 }
2265
2266 int acpi_video_register(void)
2267 {
2268 int result = 0;
2269
2270 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2271 if (!acpi_video_dir)
2272 return -ENODEV;
2273
2274 result = acpi_bus_register_driver(&acpi_video_bus);
2275 if (result < 0) {
2276 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2277 return -ENODEV;
2278 }
2279
2280 return 0;
2281 }
2282 EXPORT_SYMBOL(acpi_video_register);
2283
2284 /*
2285 * This is kind of nasty. Hardware using Intel chipsets may require
2286 * the video opregion code to be run first in order to initialise
2287 * state before any ACPI video calls are made. To handle this we defer
2288 * registration of the video class until the opregion code has run.
2289 */
2290
2291 static int __init acpi_video_init(void)
2292 {
2293 if (intel_opregion_present())
2294 return 0;
2295
2296 return acpi_video_register();
2297 }
2298
2299 void __exit acpi_video_exit(void)
2300 {
2301
2302 acpi_bus_unregister_driver(&acpi_video_bus);
2303
2304 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2305
2306 return;
2307 }
2308 EXPORT_SYMBOL(acpi_video_exit);
2309
2310 module_init(acpi_video_init);
2311 module_exit(acpi_video_exit);
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