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ACPI video: fix an error when the brightness levels on AC and on Battery are same
[wandboard.git] / drivers / acpi / video.c
blob21968ae6ed91add7b1fb23493606457caf35bc49
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 = max_level;
813 result = acpi_video_device_lcd_get_level_current(device, &level_old);
814 if (result)
815 goto out_free_levels;
816
817 result = acpi_video_device_lcd_set_level(device, br->curr);
818 if (result)
819 goto out_free_levels;
820
821 result = acpi_video_device_lcd_get_level_current(device, &level);
822 if (result)
823 goto out_free_levels;
824
825 if ((level != level_old) && !br->flags._BCM_use_index) {
826 /* Note:
827 * This piece of code does not work correctly if the current
828 * brightness levels is 0.
829 * But I guess boxes that boot with such a dark screen are rare
830 * and no more code is needed to cover this specifial case.
831 */
832
833 if (level_ac_battery != 2) {
834 /*
835 * For now, we don't support the _BCL like this:
836 * 16, 15, 0, 1, 2, 3, ..., 14, 15, 16
837 * because we may mess up the index returned by _BQC.
838 * Plus: we have not got a box like this.
839 */
840 ACPI_ERROR((AE_INFO, "_BCL not supported\n"));
841 }
842 br->flags._BQC_use_index = 1;
843 }
844
845 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
846 "found %d brightness levels\n", count - 2));
847 kfree(obj);
848 return result;
849
850 out_free_levels:
851 kfree(br->levels);
852 out_free:
853 kfree(br);
854 out:
855 device->brightness = NULL;
856 kfree(obj);
857 return result;
858 }
859
860 /*
861 * Arg:
862 * device : video output device (LCD, CRT, ..)
863 *
864 * Return Value:
865 * None
866 *
867 * Find out all required AML methods defined under the output
868 * device.
869 */
870
871 static void acpi_video_device_find_cap(struct acpi_video_device *device)
872 {
873 acpi_handle h_dummy1;
874
875
876 memset(&device->cap, 0, sizeof(device->cap));
877
878 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
879 device->cap._ADR = 1;
880 }
881 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
882 device->cap._BCL = 1;
883 }
884 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
885 device->cap._BCM = 1;
886 }
887 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
888 device->cap._BQC = 1;
889 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
890 &h_dummy1))) {
891 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
892 device->cap._BCQ = 1;
893 }
894
895 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
896 device->cap._DDC = 1;
897 }
898 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
899 device->cap._DCS = 1;
900 }
901 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
902 device->cap._DGS = 1;
903 }
904 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
905 device->cap._DSS = 1;
906 }
907
908 if (acpi_video_backlight_support()) {
909 int result;
910 static int count = 0;
911 char *name;
912
913 result = acpi_video_init_brightness(device);
914 if (result)
915 return;
916 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
917 if (!name)
918 return;
919
920 sprintf(name, "acpi_video%d", count++);
921 device->backlight = backlight_device_register(name,
922 NULL, device, &acpi_backlight_ops);
923 device->backlight->props.max_brightness = device->brightness->count-3;
924 kfree(name);
925
926 device->cdev = thermal_cooling_device_register("LCD",
927 device->dev, &video_cooling_ops);
928 if (IS_ERR(device->cdev))
929 return;
930
931 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
932 device->cdev->id);
933 result = sysfs_create_link(&device->dev->dev.kobj,
934 &device->cdev->device.kobj,
935 "thermal_cooling");
936 if (result)
937 printk(KERN_ERR PREFIX "Create sysfs link\n");
938 result = sysfs_create_link(&device->cdev->device.kobj,
939 &device->dev->dev.kobj, "device");
940 if (result)
941 printk(KERN_ERR PREFIX "Create sysfs link\n");
942
943 }
944
945 if (acpi_video_display_switch_support()) {
946
947 if (device->cap._DCS && device->cap._DSS) {
948 static int count;
949 char *name;
950 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
951 if (!name)
952 return;
953 sprintf(name, "acpi_video%d", count++);
954 device->output_dev = video_output_register(name,
955 NULL, device, &acpi_output_properties);
956 kfree(name);
957 }
958 }
959 }
960
961 /*
962 * Arg:
963 * device : video output device (VGA)
964 *
965 * Return Value:
966 * None
967 *
968 * Find out all required AML methods defined under the video bus device.
969 */
970
971 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
972 {
973 acpi_handle h_dummy1;
974
975 memset(&video->cap, 0, sizeof(video->cap));
976 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
977 video->cap._DOS = 1;
978 }
979 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
980 video->cap._DOD = 1;
981 }
982 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
983 video->cap._ROM = 1;
984 }
985 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
986 video->cap._GPD = 1;
987 }
988 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
989 video->cap._SPD = 1;
990 }
991 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
992 video->cap._VPO = 1;
993 }
994 }
995
996 /*
997 * Check whether the video bus device has required AML method to
998 * support the desired features
999 */
1000
1001 static int acpi_video_bus_check(struct acpi_video_bus *video)
1002 {
1003 acpi_status status = -ENOENT;
1004 struct device *dev;
1005
1006 if (!video)
1007 return -EINVAL;
1008
1009 dev = acpi_get_physical_pci_device(video->device->handle);
1010 if (!dev)
1011 return -ENODEV;
1012 put_device(dev);
1013
1014 /* Since there is no HID, CID and so on for VGA driver, we have
1015 * to check well known required nodes.
1016 */
1017
1018 /* Does this device support video switching? */
1019 if (video->cap._DOS) {
1020 video->flags.multihead = 1;
1021 status = 0;
1022 }
1023
1024 /* Does this device support retrieving a video ROM? */
1025 if (video->cap._ROM) {
1026 video->flags.rom = 1;
1027 status = 0;
1028 }
1029
1030 /* Does this device support configuring which video device to POST? */
1031 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1032 video->flags.post = 1;
1033 status = 0;
1034 }
1035
1036 return status;
1037 }
1038
1039 /* --------------------------------------------------------------------------
1040 FS Interface (/proc)
1041 -------------------------------------------------------------------------- */
1042
1043 static struct proc_dir_entry *acpi_video_dir;
1044
1045 /* video devices */
1046
1047 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1048 {
1049 struct acpi_video_device *dev = seq->private;
1050
1051
1052 if (!dev)
1053 goto end;
1054
1055 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1056 seq_printf(seq, "type: ");
1057 if (dev->flags.crt)
1058 seq_printf(seq, "CRT\n");
1059 else if (dev->flags.lcd)
1060 seq_printf(seq, "LCD\n");
1061 else if (dev->flags.tvout)
1062 seq_printf(seq, "TVOUT\n");
1063 else if (dev->flags.dvi)
1064 seq_printf(seq, "DVI\n");
1065 else
1066 seq_printf(seq, "UNKNOWN\n");
1067
1068 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1069
1070 end:
1071 return 0;
1072 }
1073
1074 static int
1075 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1076 {
1077 return single_open(file, acpi_video_device_info_seq_show,
1078 PDE(inode)->data);
1079 }
1080
1081 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1082 {
1083 int status;
1084 struct acpi_video_device *dev = seq->private;
1085 unsigned long long state;
1086
1087
1088 if (!dev)
1089 goto end;
1090
1091 status = acpi_video_device_get_state(dev, &state);
1092 seq_printf(seq, "state: ");
1093 if (ACPI_SUCCESS(status))
1094 seq_printf(seq, "0x%02llx\n", state);
1095 else
1096 seq_printf(seq, "<not supported>\n");
1097
1098 status = acpi_video_device_query(dev, &state);
1099 seq_printf(seq, "query: ");
1100 if (ACPI_SUCCESS(status))
1101 seq_printf(seq, "0x%02llx\n", state);
1102 else
1103 seq_printf(seq, "<not supported>\n");
1104
1105 end:
1106 return 0;
1107 }
1108
1109 static int
1110 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1111 {
1112 return single_open(file, acpi_video_device_state_seq_show,
1113 PDE(inode)->data);
1114 }
1115
1116 static ssize_t
1117 acpi_video_device_write_state(struct file *file,
1118 const char __user * buffer,
1119 size_t count, loff_t * data)
1120 {
1121 int status;
1122 struct seq_file *m = file->private_data;
1123 struct acpi_video_device *dev = m->private;
1124 char str[12] = { 0 };
1125 u32 state = 0;
1126
1127
1128 if (!dev || count + 1 > sizeof str)
1129 return -EINVAL;
1130
1131 if (copy_from_user(str, buffer, count))
1132 return -EFAULT;
1133
1134 str[count] = 0;
1135 state = simple_strtoul(str, NULL, 0);
1136 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1137
1138 status = acpi_video_device_set_state(dev, state);
1139
1140 if (status)
1141 return -EFAULT;
1142
1143 return count;
1144 }
1145
1146 static int
1147 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1148 {
1149 struct acpi_video_device *dev = seq->private;
1150 int i;
1151
1152
1153 if (!dev || !dev->brightness) {
1154 seq_printf(seq, "<not supported>\n");
1155 return 0;
1156 }
1157
1158 seq_printf(seq, "levels: ");
1159 for (i = 2; i < dev->brightness->count; i++)
1160 seq_printf(seq, " %d", dev->brightness->levels[i]);
1161 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1162
1163 return 0;
1164 }
1165
1166 static int
1167 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1168 {
1169 return single_open(file, acpi_video_device_brightness_seq_show,
1170 PDE(inode)->data);
1171 }
1172
1173 static ssize_t
1174 acpi_video_device_write_brightness(struct file *file,
1175 const char __user * buffer,
1176 size_t count, loff_t * data)
1177 {
1178 struct seq_file *m = file->private_data;
1179 struct acpi_video_device *dev = m->private;
1180 char str[5] = { 0 };
1181 unsigned int level = 0;
1182 int i;
1183
1184
1185 if (!dev || !dev->brightness || count + 1 > sizeof str)
1186 return -EINVAL;
1187
1188 if (copy_from_user(str, buffer, count))
1189 return -EFAULT;
1190
1191 str[count] = 0;
1192 level = simple_strtoul(str, NULL, 0);
1193
1194 if (level > 100)
1195 return -EFAULT;
1196
1197 /* validate through the list of available levels */
1198 for (i = 2; i < dev->brightness->count; i++)
1199 if (level == dev->brightness->levels[i]) {
1200 if (!acpi_video_device_lcd_set_level(dev, level))
1201 return count;
1202 break;
1203 }
1204
1205 return -EINVAL;
1206 }
1207
1208 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1209 {
1210 struct acpi_video_device *dev = seq->private;
1211 int status;
1212 int i;
1213 union acpi_object *edid = NULL;
1214
1215
1216 if (!dev)
1217 goto out;
1218
1219 status = acpi_video_device_EDID(dev, &edid, 128);
1220 if (ACPI_FAILURE(status)) {
1221 status = acpi_video_device_EDID(dev, &edid, 256);
1222 }
1223
1224 if (ACPI_FAILURE(status)) {
1225 goto out;
1226 }
1227
1228 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1229 for (i = 0; i < edid->buffer.length; i++)
1230 seq_putc(seq, edid->buffer.pointer[i]);
1231 }
1232
1233 out:
1234 if (!edid)
1235 seq_printf(seq, "<not supported>\n");
1236 else
1237 kfree(edid);
1238
1239 return 0;
1240 }
1241
1242 static int
1243 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1244 {
1245 return single_open(file, acpi_video_device_EDID_seq_show,
1246 PDE(inode)->data);
1247 }
1248
1249 static int acpi_video_device_add_fs(struct acpi_device *device)
1250 {
1251 struct proc_dir_entry *entry, *device_dir;
1252 struct acpi_video_device *vid_dev;
1253
1254 vid_dev = acpi_driver_data(device);
1255 if (!vid_dev)
1256 return -ENODEV;
1257
1258 device_dir = proc_mkdir(acpi_device_bid(device),
1259 vid_dev->video->dir);
1260 if (!device_dir)
1261 return -ENOMEM;
1262
1263 /* 'info' [R] */
1264 entry = proc_create_data("info", S_IRUGO, device_dir,
1265 &acpi_video_device_info_fops, acpi_driver_data(device));
1266 if (!entry)
1267 goto err_remove_dir;
1268
1269 /* 'state' [R/W] */
1270 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1271 device_dir,
1272 &acpi_video_device_state_fops,
1273 acpi_driver_data(device));
1274 if (!entry)
1275 goto err_remove_info;
1276
1277 /* 'brightness' [R/W] */
1278 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1279 device_dir,
1280 &acpi_video_device_brightness_fops,
1281 acpi_driver_data(device));
1282 if (!entry)
1283 goto err_remove_state;
1284
1285 /* 'EDID' [R] */
1286 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1287 &acpi_video_device_EDID_fops,
1288 acpi_driver_data(device));
1289 if (!entry)
1290 goto err_remove_brightness;
1291
1292 acpi_device_dir(device) = device_dir;
1293
1294 return 0;
1295
1296 err_remove_brightness:
1297 remove_proc_entry("brightness", device_dir);
1298 err_remove_state:
1299 remove_proc_entry("state", device_dir);
1300 err_remove_info:
1301 remove_proc_entry("info", device_dir);
1302 err_remove_dir:
1303 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1304 return -ENOMEM;
1305 }
1306
1307 static int acpi_video_device_remove_fs(struct acpi_device *device)
1308 {
1309 struct acpi_video_device *vid_dev;
1310 struct proc_dir_entry *device_dir;
1311
1312 vid_dev = acpi_driver_data(device);
1313 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1314 return -ENODEV;
1315
1316 device_dir = acpi_device_dir(device);
1317 if (device_dir) {
1318 remove_proc_entry("info", device_dir);
1319 remove_proc_entry("state", device_dir);
1320 remove_proc_entry("brightness", device_dir);
1321 remove_proc_entry("EDID", device_dir);
1322 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1323 acpi_device_dir(device) = NULL;
1324 }
1325
1326 return 0;
1327 }
1328
1329 /* video bus */
1330 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1331 {
1332 struct acpi_video_bus *video = seq->private;
1333
1334
1335 if (!video)
1336 goto end;
1337
1338 seq_printf(seq, "Switching heads: %s\n",
1339 video->flags.multihead ? "yes" : "no");
1340 seq_printf(seq, "Video ROM: %s\n",
1341 video->flags.rom ? "yes" : "no");
1342 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1343 video->flags.post ? "yes" : "no");
1344
1345 end:
1346 return 0;
1347 }
1348
1349 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1350 {
1351 return single_open(file, acpi_video_bus_info_seq_show,
1352 PDE(inode)->data);
1353 }
1354
1355 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1356 {
1357 struct acpi_video_bus *video = seq->private;
1358
1359
1360 if (!video)
1361 goto end;
1362
1363 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1364 seq_printf(seq, "<TODO>\n");
1365
1366 end:
1367 return 0;
1368 }
1369
1370 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1371 {
1372 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1373 }
1374
1375 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1376 {
1377 struct acpi_video_bus *video = seq->private;
1378 unsigned long long options;
1379 int status;
1380
1381
1382 if (!video)
1383 goto end;
1384
1385 status = acpi_video_bus_POST_options(video, &options);
1386 if (ACPI_SUCCESS(status)) {
1387 if (!(options & 1)) {
1388 printk(KERN_WARNING PREFIX
1389 "The motherboard VGA device is not listed as a possible POST device.\n");
1390 printk(KERN_WARNING PREFIX
1391 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1392 }
1393 printk(KERN_WARNING "%llx\n", options);
1394 seq_printf(seq, "can POST: <integrated video>");
1395 if (options & 2)
1396 seq_printf(seq, " <PCI video>");
1397 if (options & 4)
1398 seq_printf(seq, " <AGP video>");
1399 seq_putc(seq, '\n');
1400 } else
1401 seq_printf(seq, "<not supported>\n");
1402 end:
1403 return 0;
1404 }
1405
1406 static int
1407 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1408 {
1409 return single_open(file, acpi_video_bus_POST_info_seq_show,
1410 PDE(inode)->data);
1411 }
1412
1413 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1414 {
1415 struct acpi_video_bus *video = seq->private;
1416 int status;
1417 unsigned long long id;
1418
1419
1420 if (!video)
1421 goto end;
1422
1423 status = acpi_video_bus_get_POST(video, &id);
1424 if (!ACPI_SUCCESS(status)) {
1425 seq_printf(seq, "<not supported>\n");
1426 goto end;
1427 }
1428 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1429
1430 end:
1431 return 0;
1432 }
1433
1434 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1435 {
1436 struct acpi_video_bus *video = seq->private;
1437
1438
1439 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1440
1441 return 0;
1442 }
1443
1444 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1445 {
1446 return single_open(file, acpi_video_bus_POST_seq_show,
1447 PDE(inode)->data);
1448 }
1449
1450 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1451 {
1452 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1453 }
1454
1455 static ssize_t
1456 acpi_video_bus_write_POST(struct file *file,
1457 const char __user * buffer,
1458 size_t count, loff_t * data)
1459 {
1460 int status;
1461 struct seq_file *m = file->private_data;
1462 struct acpi_video_bus *video = m->private;
1463 char str[12] = { 0 };
1464 unsigned long long opt, options;
1465
1466
1467 if (!video || count + 1 > sizeof str)
1468 return -EINVAL;
1469
1470 status = acpi_video_bus_POST_options(video, &options);
1471 if (!ACPI_SUCCESS(status))
1472 return -EINVAL;
1473
1474 if (copy_from_user(str, buffer, count))
1475 return -EFAULT;
1476
1477 str[count] = 0;
1478 opt = strtoul(str, NULL, 0);
1479 if (opt > 3)
1480 return -EFAULT;
1481
1482 /* just in case an OEM 'forgot' the motherboard... */
1483 options |= 1;
1484
1485 if (options & (1ul << opt)) {
1486 status = acpi_video_bus_set_POST(video, opt);
1487 if (!ACPI_SUCCESS(status))
1488 return -EFAULT;
1489
1490 }
1491
1492 return count;
1493 }
1494
1495 static ssize_t
1496 acpi_video_bus_write_DOS(struct file *file,
1497 const char __user * buffer,
1498 size_t count, loff_t * data)
1499 {
1500 int status;
1501 struct seq_file *m = file->private_data;
1502 struct acpi_video_bus *video = m->private;
1503 char str[12] = { 0 };
1504 unsigned long opt;
1505
1506
1507 if (!video || count + 1 > sizeof str)
1508 return -EINVAL;
1509
1510 if (copy_from_user(str, buffer, count))
1511 return -EFAULT;
1512
1513 str[count] = 0;
1514 opt = strtoul(str, NULL, 0);
1515 if (opt > 7)
1516 return -EFAULT;
1517
1518 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1519
1520 if (!ACPI_SUCCESS(status))
1521 return -EFAULT;
1522
1523 return count;
1524 }
1525
1526 static int acpi_video_bus_add_fs(struct acpi_device *device)
1527 {
1528 struct acpi_video_bus *video = acpi_driver_data(device);
1529 struct proc_dir_entry *device_dir;
1530 struct proc_dir_entry *entry;
1531
1532 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1533 if (!device_dir)
1534 return -ENOMEM;
1535
1536 /* 'info' [R] */
1537 entry = proc_create_data("info", S_IRUGO, device_dir,
1538 &acpi_video_bus_info_fops,
1539 acpi_driver_data(device));
1540 if (!entry)
1541 goto err_remove_dir;
1542
1543 /* 'ROM' [R] */
1544 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1545 &acpi_video_bus_ROM_fops,
1546 acpi_driver_data(device));
1547 if (!entry)
1548 goto err_remove_info;
1549
1550 /* 'POST_info' [R] */
1551 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1552 &acpi_video_bus_POST_info_fops,
1553 acpi_driver_data(device));
1554 if (!entry)
1555 goto err_remove_rom;
1556
1557 /* 'POST' [R/W] */
1558 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1559 device_dir,
1560 &acpi_video_bus_POST_fops,
1561 acpi_driver_data(device));
1562 if (!entry)
1563 goto err_remove_post_info;
1564
1565 /* 'DOS' [R/W] */
1566 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1567 device_dir,
1568 &acpi_video_bus_DOS_fops,
1569 acpi_driver_data(device));
1570 if (!entry)
1571 goto err_remove_post;
1572
1573 video->dir = acpi_device_dir(device) = device_dir;
1574 return 0;
1575
1576 err_remove_post:
1577 remove_proc_entry("POST", device_dir);
1578 err_remove_post_info:
1579 remove_proc_entry("POST_info", device_dir);
1580 err_remove_rom:
1581 remove_proc_entry("ROM", device_dir);
1582 err_remove_info:
1583 remove_proc_entry("info", device_dir);
1584 err_remove_dir:
1585 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1586 return -ENOMEM;
1587 }
1588
1589 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1590 {
1591 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1592
1593 if (device_dir) {
1594 remove_proc_entry("info", device_dir);
1595 remove_proc_entry("ROM", device_dir);
1596 remove_proc_entry("POST_info", device_dir);
1597 remove_proc_entry("POST", device_dir);
1598 remove_proc_entry("DOS", device_dir);
1599 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1600 acpi_device_dir(device) = NULL;
1601 }
1602
1603 return 0;
1604 }
1605
1606 /* --------------------------------------------------------------------------
1607 Driver Interface
1608 -------------------------------------------------------------------------- */
1609
1610 /* device interface */
1611 static struct acpi_video_device_attrib*
1612 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1613 {
1614 struct acpi_video_enumerated_device *ids;
1615 int i;
1616
1617 for (i = 0; i < video->attached_count; i++) {
1618 ids = &video->attached_array[i];
1619 if ((ids->value.int_val & 0xffff) == device_id)
1620 return &ids->value.attrib;
1621 }
1622
1623 return NULL;
1624 }
1625
1626 static int
1627 acpi_video_bus_get_one_device(struct acpi_device *device,
1628 struct acpi_video_bus *video)
1629 {
1630 unsigned long long device_id;
1631 int status;
1632 struct acpi_video_device *data;
1633 struct acpi_video_device_attrib* attribute;
1634
1635 if (!device || !video)
1636 return -EINVAL;
1637
1638 status =
1639 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1640 if (ACPI_SUCCESS(status)) {
1641
1642 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1643 if (!data)
1644 return -ENOMEM;
1645
1646 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1647 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1648 device->driver_data = data;
1649
1650 data->device_id = device_id;
1651 data->video = video;
1652 data->dev = device;
1653
1654 attribute = acpi_video_get_device_attr(video, device_id);
1655
1656 if((attribute != NULL) && attribute->device_id_scheme) {
1657 switch (attribute->display_type) {
1658 case ACPI_VIDEO_DISPLAY_CRT:
1659 data->flags.crt = 1;
1660 break;
1661 case ACPI_VIDEO_DISPLAY_TV:
1662 data->flags.tvout = 1;
1663 break;
1664 case ACPI_VIDEO_DISPLAY_DVI:
1665 data->flags.dvi = 1;
1666 break;
1667 case ACPI_VIDEO_DISPLAY_LCD:
1668 data->flags.lcd = 1;
1669 break;
1670 default:
1671 data->flags.unknown = 1;
1672 break;
1673 }
1674 if(attribute->bios_can_detect)
1675 data->flags.bios = 1;
1676 } else
1677 data->flags.unknown = 1;
1678
1679 acpi_video_device_bind(video, data);
1680 acpi_video_device_find_cap(data);
1681
1682 status = acpi_install_notify_handler(device->handle,
1683 ACPI_DEVICE_NOTIFY,
1684 acpi_video_device_notify,
1685 data);
1686 if (ACPI_FAILURE(status)) {
1687 printk(KERN_ERR PREFIX
1688 "Error installing notify handler\n");
1689 if(data->brightness)
1690 kfree(data->brightness->levels);
1691 kfree(data->brightness);
1692 kfree(data);
1693 return -ENODEV;
1694 }
1695
1696 mutex_lock(&video->device_list_lock);
1697 list_add_tail(&data->entry, &video->video_device_list);
1698 mutex_unlock(&video->device_list_lock);
1699
1700 acpi_video_device_add_fs(device);
1701
1702 return 0;
1703 }
1704
1705 return -ENOENT;
1706 }
1707
1708 /*
1709 * Arg:
1710 * video : video bus device
1711 *
1712 * Return:
1713 * none
1714 *
1715 * Enumerate the video device list of the video bus,
1716 * bind the ids with the corresponding video devices
1717 * under the video bus.
1718 */
1719
1720 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1721 {
1722 struct acpi_video_device *dev;
1723
1724 mutex_lock(&video->device_list_lock);
1725
1726 list_for_each_entry(dev, &video->video_device_list, entry)
1727 acpi_video_device_bind(video, dev);
1728
1729 mutex_unlock(&video->device_list_lock);
1730 }
1731
1732 /*
1733 * Arg:
1734 * video : video bus device
1735 * device : video output device under the video
1736 * bus
1737 *
1738 * Return:
1739 * none
1740 *
1741 * Bind the ids with the corresponding video devices
1742 * under the video bus.
1743 */
1744
1745 static void
1746 acpi_video_device_bind(struct acpi_video_bus *video,
1747 struct acpi_video_device *device)
1748 {
1749 struct acpi_video_enumerated_device *ids;
1750 int i;
1751
1752 for (i = 0; i < video->attached_count; i++) {
1753 ids = &video->attached_array[i];
1754 if (device->device_id == (ids->value.int_val & 0xffff)) {
1755 ids->bind_info = device;
1756 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1757 }
1758 }
1759 }
1760
1761 /*
1762 * Arg:
1763 * video : video bus device
1764 *
1765 * Return:
1766 * < 0 : error
1767 *
1768 * Call _DOD to enumerate all devices attached to display adapter
1769 *
1770 */
1771
1772 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1773 {
1774 int status;
1775 int count;
1776 int i;
1777 struct acpi_video_enumerated_device *active_list;
1778 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1779 union acpi_object *dod = NULL;
1780 union acpi_object *obj;
1781
1782 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1783 if (!ACPI_SUCCESS(status)) {
1784 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1785 return status;
1786 }
1787
1788 dod = buffer.pointer;
1789 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1790 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1791 status = -EFAULT;
1792 goto out;
1793 }
1794
1795 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1796 dod->package.count));
1797
1798 active_list = kcalloc(1 + dod->package.count,
1799 sizeof(struct acpi_video_enumerated_device),
1800 GFP_KERNEL);
1801 if (!active_list) {
1802 status = -ENOMEM;
1803 goto out;
1804 }
1805
1806 count = 0;
1807 for (i = 0; i < dod->package.count; i++) {
1808 obj = &dod->package.elements[i];
1809
1810 if (obj->type != ACPI_TYPE_INTEGER) {
1811 printk(KERN_ERR PREFIX
1812 "Invalid _DOD data in element %d\n", i);
1813 continue;
1814 }
1815
1816 active_list[count].value.int_val = obj->integer.value;
1817 active_list[count].bind_info = NULL;
1818 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1819 (int)obj->integer.value));
1820 count++;
1821 }
1822
1823 kfree(video->attached_array);
1824
1825 video->attached_array = active_list;
1826 video->attached_count = count;
1827
1828 out:
1829 kfree(buffer.pointer);
1830 return status;
1831 }
1832
1833 static int
1834 acpi_video_get_next_level(struct acpi_video_device *device,
1835 u32 level_current, u32 event)
1836 {
1837 int min, max, min_above, max_below, i, l, delta = 255;
1838 max = max_below = 0;
1839 min = min_above = 255;
1840 /* Find closest level to level_current */
1841 for (i = 2; i < device->brightness->count; i++) {
1842 l = device->brightness->levels[i];
1843 if (abs(l - level_current) < abs(delta)) {
1844 delta = l - level_current;
1845 if (!delta)
1846 break;
1847 }
1848 }
1849 /* Ajust level_current to closest available level */
1850 level_current += delta;
1851 for (i = 2; i < device->brightness->count; i++) {
1852 l = device->brightness->levels[i];
1853 if (l < min)
1854 min = l;
1855 if (l > max)
1856 max = l;
1857 if (l < min_above && l > level_current)
1858 min_above = l;
1859 if (l > max_below && l < level_current)
1860 max_below = l;
1861 }
1862
1863 switch (event) {
1864 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1865 return (level_current < max) ? min_above : min;
1866 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1867 return (level_current < max) ? min_above : max;
1868 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1869 return (level_current > min) ? max_below : min;
1870 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1871 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1872 return 0;
1873 default:
1874 return level_current;
1875 }
1876 }
1877
1878 static int
1879 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1880 {
1881 unsigned long long level_current, level_next;
1882 int result = -EINVAL;
1883
1884 if (!device->brightness)
1885 goto out;
1886
1887 result = acpi_video_device_lcd_get_level_current(device,
1888 &level_current);
1889 if (result)
1890 goto out;
1891
1892 level_next = acpi_video_get_next_level(device, level_current, event);
1893
1894 result = acpi_video_device_lcd_set_level(device, level_next);
1895
1896 out:
1897 if (result)
1898 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1899
1900 return result;
1901 }
1902
1903 static int
1904 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1905 struct acpi_device *device)
1906 {
1907 int status = 0;
1908 struct acpi_device *dev;
1909
1910 acpi_video_device_enumerate(video);
1911
1912 list_for_each_entry(dev, &device->children, node) {
1913
1914 status = acpi_video_bus_get_one_device(dev, video);
1915 if (ACPI_FAILURE(status)) {
1916 printk(KERN_WARNING PREFIX
1917 "Cant attach device");
1918 continue;
1919 }
1920 }
1921 return status;
1922 }
1923
1924 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1925 {
1926 acpi_status status;
1927 struct acpi_video_bus *video;
1928
1929
1930 if (!device || !device->video)
1931 return -ENOENT;
1932
1933 video = device->video;
1934
1935 acpi_video_device_remove_fs(device->dev);
1936
1937 status = acpi_remove_notify_handler(device->dev->handle,
1938 ACPI_DEVICE_NOTIFY,
1939 acpi_video_device_notify);
1940 backlight_device_unregister(device->backlight);
1941 if (device->cdev) {
1942 sysfs_remove_link(&device->dev->dev.kobj,
1943 "thermal_cooling");
1944 sysfs_remove_link(&device->cdev->device.kobj,
1945 "device");
1946 thermal_cooling_device_unregister(device->cdev);
1947 device->cdev = NULL;
1948 }
1949 video_output_unregister(device->output_dev);
1950
1951 return 0;
1952 }
1953
1954 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1955 {
1956 int status;
1957 struct acpi_video_device *dev, *next;
1958
1959 mutex_lock(&video->device_list_lock);
1960
1961 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1962
1963 status = acpi_video_bus_put_one_device(dev);
1964 if (ACPI_FAILURE(status))
1965 printk(KERN_WARNING PREFIX
1966 "hhuuhhuu bug in acpi video driver.\n");
1967
1968 if (dev->brightness) {
1969 kfree(dev->brightness->levels);
1970 kfree(dev->brightness);
1971 }
1972 list_del(&dev->entry);
1973 kfree(dev);
1974 }
1975
1976 mutex_unlock(&video->device_list_lock);
1977
1978 return 0;
1979 }
1980
1981 /* acpi_video interface */
1982
1983 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1984 {
1985 return acpi_video_bus_DOS(video, 0, 0);
1986 }
1987
1988 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1989 {
1990 return acpi_video_bus_DOS(video, 0, 1);
1991 }
1992
1993 static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
1994 {
1995 struct acpi_video_bus *video = acpi_driver_data(device);
1996 struct input_dev *input;
1997 int keycode;
1998
1999 if (!video)
2000 return;
2001
2002 input = video->input;
2003
2004 switch (event) {
2005 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
2006 * most likely via hotkey. */
2007 acpi_bus_generate_proc_event(device, event, 0);
2008 keycode = KEY_SWITCHVIDEOMODE;
2009 break;
2010
2011 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
2012 * connector. */
2013 acpi_video_device_enumerate(video);
2014 acpi_video_device_rebind(video);
2015 acpi_bus_generate_proc_event(device, event, 0);
2016 keycode = KEY_SWITCHVIDEOMODE;
2017 break;
2018
2019 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2020 acpi_bus_generate_proc_event(device, event, 0);
2021 keycode = KEY_SWITCHVIDEOMODE;
2022 break;
2023 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2024 acpi_bus_generate_proc_event(device, event, 0);
2025 keycode = KEY_VIDEO_NEXT;
2026 break;
2027 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2028 acpi_bus_generate_proc_event(device, event, 0);
2029 keycode = KEY_VIDEO_PREV;
2030 break;
2031
2032 default:
2033 keycode = KEY_UNKNOWN;
2034 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2035 "Unsupported event [0x%x]\n", event));
2036 break;
2037 }
2038
2039 acpi_notifier_call_chain(device, event, 0);
2040 input_report_key(input, keycode, 1);
2041 input_sync(input);
2042 input_report_key(input, keycode, 0);
2043 input_sync(input);
2044
2045 return;
2046 }
2047
2048 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2049 {
2050 struct acpi_video_device *video_device = data;
2051 struct acpi_device *device = NULL;
2052 struct acpi_video_bus *bus;
2053 struct input_dev *input;
2054 int keycode;
2055
2056 if (!video_device)
2057 return;
2058
2059 device = video_device->dev;
2060 bus = video_device->video;
2061 input = bus->input;
2062
2063 switch (event) {
2064 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
2065 if (brightness_switch_enabled)
2066 acpi_video_switch_brightness(video_device, event);
2067 acpi_bus_generate_proc_event(device, event, 0);
2068 keycode = KEY_BRIGHTNESS_CYCLE;
2069 break;
2070 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
2071 if (brightness_switch_enabled)
2072 acpi_video_switch_brightness(video_device, event);
2073 acpi_bus_generate_proc_event(device, event, 0);
2074 keycode = KEY_BRIGHTNESSUP;
2075 break;
2076 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2077 if (brightness_switch_enabled)
2078 acpi_video_switch_brightness(video_device, event);
2079 acpi_bus_generate_proc_event(device, event, 0);
2080 keycode = KEY_BRIGHTNESSDOWN;
2081 break;
2082 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2083 if (brightness_switch_enabled)
2084 acpi_video_switch_brightness(video_device, event);
2085 acpi_bus_generate_proc_event(device, event, 0);
2086 keycode = KEY_BRIGHTNESS_ZERO;
2087 break;
2088 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2089 if (brightness_switch_enabled)
2090 acpi_video_switch_brightness(video_device, event);
2091 acpi_bus_generate_proc_event(device, event, 0);
2092 keycode = KEY_DISPLAY_OFF;
2093 break;
2094 default:
2095 keycode = KEY_UNKNOWN;
2096 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2097 "Unsupported event [0x%x]\n", event));
2098 break;
2099 }
2100
2101 acpi_notifier_call_chain(device, event, 0);
2102 input_report_key(input, keycode, 1);
2103 input_sync(input);
2104 input_report_key(input, keycode, 0);
2105 input_sync(input);
2106
2107 return;
2108 }
2109
2110 static int instance;
2111 static int acpi_video_resume(struct acpi_device *device)
2112 {
2113 struct acpi_video_bus *video;
2114 struct acpi_video_device *video_device;
2115 int i;
2116
2117 if (!device || !acpi_driver_data(device))
2118 return -EINVAL;
2119
2120 video = acpi_driver_data(device);
2121
2122 for (i = 0; i < video->attached_count; i++) {
2123 video_device = video->attached_array[i].bind_info;
2124 if (video_device && video_device->backlight)
2125 acpi_video_set_brightness(video_device->backlight);
2126 }
2127 return AE_OK;
2128 }
2129
2130 static int acpi_video_bus_add(struct acpi_device *device)
2131 {
2132 struct acpi_video_bus *video;
2133 struct input_dev *input;
2134 int error;
2135
2136 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2137 if (!video)
2138 return -ENOMEM;
2139
2140 /* a hack to fix the duplicate name "VID" problem on T61 */
2141 if (!strcmp(device->pnp.bus_id, "VID")) {
2142 if (instance)
2143 device->pnp.bus_id[3] = '0' + instance;
2144 instance ++;
2145 }
2146 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2147 if (!strcmp(device->pnp.bus_id, "VGA")) {
2148 if (instance)
2149 device->pnp.bus_id[3] = '0' + instance;
2150 instance++;
2151 }
2152
2153 video->device = device;
2154 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2155 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2156 device->driver_data = video;
2157
2158 acpi_video_bus_find_cap(video);
2159 error = acpi_video_bus_check(video);
2160 if (error)
2161 goto err_free_video;
2162
2163 error = acpi_video_bus_add_fs(device);
2164 if (error)
2165 goto err_free_video;
2166
2167 mutex_init(&video->device_list_lock);
2168 INIT_LIST_HEAD(&video->video_device_list);
2169
2170 acpi_video_bus_get_devices(video, device);
2171 acpi_video_bus_start_devices(video);
2172
2173 video->input = input = input_allocate_device();
2174 if (!input) {
2175 error = -ENOMEM;
2176 goto err_stop_video;
2177 }
2178
2179 snprintf(video->phys, sizeof(video->phys),
2180 "%s/video/input0", acpi_device_hid(video->device));
2181
2182 input->name = acpi_device_name(video->device);
2183 input->phys = video->phys;
2184 input->id.bustype = BUS_HOST;
2185 input->id.product = 0x06;
2186 input->dev.parent = &device->dev;
2187 input->evbit[0] = BIT(EV_KEY);
2188 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2189 set_bit(KEY_VIDEO_NEXT, input->keybit);
2190 set_bit(KEY_VIDEO_PREV, input->keybit);
2191 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2192 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2193 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2194 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2195 set_bit(KEY_DISPLAY_OFF, input->keybit);
2196 set_bit(KEY_UNKNOWN, input->keybit);
2197
2198 error = input_register_device(input);
2199 if (error)
2200 goto err_free_input_dev;
2201
2202 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2203 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2204 video->flags.multihead ? "yes" : "no",
2205 video->flags.rom ? "yes" : "no",
2206 video->flags.post ? "yes" : "no");
2207
2208 return 0;
2209
2210 err_free_input_dev:
2211 input_free_device(input);
2212 err_stop_video:
2213 acpi_video_bus_stop_devices(video);
2214 acpi_video_bus_put_devices(video);
2215 kfree(video->attached_array);
2216 acpi_video_bus_remove_fs(device);
2217 err_free_video:
2218 kfree(video);
2219 device->driver_data = NULL;
2220
2221 return error;
2222 }
2223
2224 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2225 {
2226 struct acpi_video_bus *video = NULL;
2227
2228
2229 if (!device || !acpi_driver_data(device))
2230 return -EINVAL;
2231
2232 video = acpi_driver_data(device);
2233
2234 acpi_video_bus_stop_devices(video);
2235 acpi_video_bus_put_devices(video);
2236 acpi_video_bus_remove_fs(device);
2237
2238 input_unregister_device(video->input);
2239 kfree(video->attached_array);
2240 kfree(video);
2241
2242 return 0;
2243 }
2244
2245 static int __init intel_opregion_present(void)
2246 {
2247 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2248 struct pci_dev *dev = NULL;
2249 u32 address;
2250
2251 for_each_pci_dev(dev) {
2252 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2253 continue;
2254 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2255 continue;
2256 pci_read_config_dword(dev, 0xfc, &address);
2257 if (!address)
2258 continue;
2259 return 1;
2260 }
2261 #endif
2262 return 0;
2263 }
2264
2265 int acpi_video_register(void)
2266 {
2267 int result = 0;
2268
2269 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2270 if (!acpi_video_dir)
2271 return -ENODEV;
2272
2273 result = acpi_bus_register_driver(&acpi_video_bus);
2274 if (result < 0) {
2275 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2276 return -ENODEV;
2277 }
2278
2279 return 0;
2280 }
2281 EXPORT_SYMBOL(acpi_video_register);
2282
2283 /*
2284 * This is kind of nasty. Hardware using Intel chipsets may require
2285 * the video opregion code to be run first in order to initialise
2286 * state before any ACPI video calls are made. To handle this we defer
2287 * registration of the video class until the opregion code has run.
2288 */
2289
2290 static int __init acpi_video_init(void)
2291 {
2292 if (intel_opregion_present())
2293 return 0;
2294
2295 return acpi_video_register();
2296 }
2297
2298 static void __exit acpi_video_exit(void)
2299 {
2300
2301 acpi_bus_unregister_driver(&acpi_video_bus);
2302
2303 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2304
2305 return;
2306 }
2307
2308 module_init(acpi_video_init);
2309 module_exit(acpi_video_exit);
WandBoard kernel