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ACPI: fix hotplug race
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / video.c
blobe8a51a1700f710ca45d7ceba5a22429f7d348fbe
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <asm/uaccess.h>
40
41 #include <acpi/acpi_bus.h>
42 #include <acpi/acpi_drivers.h>
43
44 #define ACPI_VIDEO_COMPONENT 0x08000000
45 #define ACPI_VIDEO_CLASS "video"
46 #define ACPI_VIDEO_BUS_NAME "Video Bus"
47 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
48 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
49 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
50 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
51 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
52 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
53
54 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
55 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
56 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
57 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
58 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
59
60 #define MAX_NAME_LEN 20
61
62 #define ACPI_VIDEO_DISPLAY_CRT 1
63 #define ACPI_VIDEO_DISPLAY_TV 2
64 #define ACPI_VIDEO_DISPLAY_DVI 3
65 #define ACPI_VIDEO_DISPLAY_LCD 4
66
67 #define _COMPONENT ACPI_VIDEO_COMPONENT
68 ACPI_MODULE_NAME("video");
69
70 MODULE_AUTHOR("Bruno Ducrot");
71 MODULE_DESCRIPTION("ACPI Video Driver");
72 MODULE_LICENSE("GPL");
73
74 static int brightness_switch_enabled = 1;
75 module_param(brightness_switch_enabled, bool, 0644);
76
77 static int acpi_video_bus_add(struct acpi_device *device);
78 static int acpi_video_bus_remove(struct acpi_device *device, int type);
79 static int acpi_video_resume(struct acpi_device *device);
80
81 static const struct acpi_device_id video_device_ids[] = {
82 {ACPI_VIDEO_HID, 0},
83 {"", 0},
84 };
85 MODULE_DEVICE_TABLE(acpi, video_device_ids);
86
87 static struct acpi_driver acpi_video_bus = {
88 .name = "video",
89 .class = ACPI_VIDEO_CLASS,
90 .ids = video_device_ids,
91 .ops = {
92 .add = acpi_video_bus_add,
93 .remove = acpi_video_bus_remove,
94 .resume = acpi_video_resume,
95 },
96 };
97
98 struct acpi_video_bus_flags {
99 u8 multihead:1; /* can switch video heads */
100 u8 rom:1; /* can retrieve a video rom */
101 u8 post:1; /* can configure the head to */
102 u8 reserved:5;
103 };
104
105 struct acpi_video_bus_cap {
106 u8 _DOS:1; /*Enable/Disable output switching */
107 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
108 u8 _ROM:1; /*Get ROM Data */
109 u8 _GPD:1; /*Get POST Device */
110 u8 _SPD:1; /*Set POST Device */
111 u8 _VPO:1; /*Video POST Options */
112 u8 reserved:2;
113 };
114
115 struct acpi_video_device_attrib {
116 u32 display_index:4; /* A zero-based instance of the Display */
117 u32 display_port_attachment:4; /*This field differentiates the display type */
118 u32 display_type:4; /*Describe the specific type in use */
119 u32 vendor_specific:4; /*Chipset Vendor Specific */
120 u32 bios_can_detect:1; /*BIOS can detect the device */
121 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
122 the VGA device. */
123 u32 pipe_id:3; /*For VGA multiple-head devices. */
124 u32 reserved:10; /*Must be 0 */
125 u32 device_id_scheme:1; /*Device ID Scheme */
126 };
127
128 struct acpi_video_enumerated_device {
129 union {
130 u32 int_val;
131 struct acpi_video_device_attrib attrib;
132 } value;
133 struct acpi_video_device *bind_info;
134 };
135
136 struct acpi_video_bus {
137 struct acpi_device *device;
138 u8 dos_setting;
139 struct acpi_video_enumerated_device *attached_array;
140 u8 attached_count;
141 struct acpi_video_bus_cap cap;
142 struct acpi_video_bus_flags flags;
143 struct list_head video_device_list;
144 struct mutex device_list_lock; /* protects video_device_list */
145 struct proc_dir_entry *dir;
146 struct input_dev *input;
147 char phys[32]; /* for input device */
148 };
149
150 struct acpi_video_device_flags {
151 u8 crt:1;
152 u8 lcd:1;
153 u8 tvout:1;
154 u8 dvi:1;
155 u8 bios:1;
156 u8 unknown:1;
157 u8 reserved:2;
158 };
159
160 struct acpi_video_device_cap {
161 u8 _ADR:1; /*Return the unique ID */
162 u8 _BCL:1; /*Query list of brightness control levels supported */
163 u8 _BCM:1; /*Set the brightness level */
164 u8 _BQC:1; /* Get current brightness level */
165 u8 _DDC:1; /*Return the EDID for this device */
166 u8 _DCS:1; /*Return status of output device */
167 u8 _DGS:1; /*Query graphics state */
168 u8 _DSS:1; /*Device state set */
169 };
170
171 struct acpi_video_device_brightness {
172 int curr;
173 int count;
174 int *levels;
175 };
176
177 struct acpi_video_device {
178 unsigned long device_id;
179 struct acpi_video_device_flags flags;
180 struct acpi_video_device_cap cap;
181 struct list_head entry;
182 struct acpi_video_bus *video;
183 struct acpi_device *dev;
184 struct acpi_video_device_brightness *brightness;
185 struct backlight_device *backlight;
186 struct thermal_cooling_device *cdev;
187 struct output_device *output_dev;
188 };
189
190 /* bus */
191 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
192 static struct file_operations acpi_video_bus_info_fops = {
193 .owner = THIS_MODULE,
194 .open = acpi_video_bus_info_open_fs,
195 .read = seq_read,
196 .llseek = seq_lseek,
197 .release = single_release,
198 };
199
200 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
201 static struct file_operations acpi_video_bus_ROM_fops = {
202 .owner = THIS_MODULE,
203 .open = acpi_video_bus_ROM_open_fs,
204 .read = seq_read,
205 .llseek = seq_lseek,
206 .release = single_release,
207 };
208
209 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
210 struct file *file);
211 static struct file_operations acpi_video_bus_POST_info_fops = {
212 .owner = THIS_MODULE,
213 .open = acpi_video_bus_POST_info_open_fs,
214 .read = seq_read,
215 .llseek = seq_lseek,
216 .release = single_release,
217 };
218
219 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
220 static struct file_operations acpi_video_bus_POST_fops = {
221 .owner = THIS_MODULE,
222 .open = acpi_video_bus_POST_open_fs,
223 .read = seq_read,
224 .llseek = seq_lseek,
225 .release = single_release,
226 };
227
228 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
229 static struct file_operations acpi_video_bus_DOS_fops = {
230 .owner = THIS_MODULE,
231 .open = acpi_video_bus_DOS_open_fs,
232 .read = seq_read,
233 .llseek = seq_lseek,
234 .release = single_release,
235 };
236
237 /* device */
238 static int acpi_video_device_info_open_fs(struct inode *inode,
239 struct file *file);
240 static struct file_operations acpi_video_device_info_fops = {
241 .owner = THIS_MODULE,
242 .open = acpi_video_device_info_open_fs,
243 .read = seq_read,
244 .llseek = seq_lseek,
245 .release = single_release,
246 };
247
248 static int acpi_video_device_state_open_fs(struct inode *inode,
249 struct file *file);
250 static struct file_operations acpi_video_device_state_fops = {
251 .owner = THIS_MODULE,
252 .open = acpi_video_device_state_open_fs,
253 .read = seq_read,
254 .llseek = seq_lseek,
255 .release = single_release,
256 };
257
258 static int acpi_video_device_brightness_open_fs(struct inode *inode,
259 struct file *file);
260 static struct file_operations acpi_video_device_brightness_fops = {
261 .owner = THIS_MODULE,
262 .open = acpi_video_device_brightness_open_fs,
263 .read = seq_read,
264 .llseek = seq_lseek,
265 .release = single_release,
266 };
267
268 static int acpi_video_device_EDID_open_fs(struct inode *inode,
269 struct file *file);
270 static struct file_operations acpi_video_device_EDID_fops = {
271 .owner = THIS_MODULE,
272 .open = acpi_video_device_EDID_open_fs,
273 .read = seq_read,
274 .llseek = seq_lseek,
275 .release = single_release,
276 };
277
278 static char device_decode[][30] = {
279 "motherboard VGA device",
280 "PCI VGA device",
281 "AGP VGA device",
282 "UNKNOWN",
283 };
284
285 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
286 static void acpi_video_device_rebind(struct acpi_video_bus *video);
287 static void acpi_video_device_bind(struct acpi_video_bus *video,
288 struct acpi_video_device *device);
289 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
290 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
291 int level);
292 static int acpi_video_device_lcd_get_level_current(
293 struct acpi_video_device *device,
294 unsigned long *level);
295 static int acpi_video_get_next_level(struct acpi_video_device *device,
296 u32 level_current, u32 event);
297 static void acpi_video_switch_brightness(struct acpi_video_device *device,
298 int event);
299 static int acpi_video_device_get_state(struct acpi_video_device *device,
300 unsigned long *state);
301 static int acpi_video_output_get(struct output_device *od);
302 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
303
304 /*backlight device sysfs support*/
305 static int acpi_video_get_brightness(struct backlight_device *bd)
306 {
307 unsigned long cur_level;
308 int i;
309 struct acpi_video_device *vd =
310 (struct acpi_video_device *)bl_get_data(bd);
311 acpi_video_device_lcd_get_level_current(vd, &cur_level);
312 for (i = 2; i < vd->brightness->count; i++) {
313 if (vd->brightness->levels[i] == cur_level)
314 /* The first two entries are special - see page 575
315 of the ACPI spec 3.0 */
316 return i-2;
317 }
318 return 0;
319 }
320
321 static int acpi_video_set_brightness(struct backlight_device *bd)
322 {
323 int request_level = bd->props.brightness+2;
324 struct acpi_video_device *vd =
325 (struct acpi_video_device *)bl_get_data(bd);
326 acpi_video_device_lcd_set_level(vd,
327 vd->brightness->levels[request_level]);
328 return 0;
329 }
330
331 static struct backlight_ops acpi_backlight_ops = {
332 .get_brightness = acpi_video_get_brightness,
333 .update_status = acpi_video_set_brightness,
334 };
335
336 /*video output device sysfs support*/
337 static int acpi_video_output_get(struct output_device *od)
338 {
339 unsigned long state;
340 struct acpi_video_device *vd =
341 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
342 acpi_video_device_get_state(vd, &state);
343 return (int)state;
344 }
345
346 static int acpi_video_output_set(struct output_device *od)
347 {
348 unsigned long state = od->request_state;
349 struct acpi_video_device *vd=
350 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
351 return acpi_video_device_set_state(vd, state);
352 }
353
354 static struct output_properties acpi_output_properties = {
355 .set_state = acpi_video_output_set,
356 .get_status = acpi_video_output_get,
357 };
358
359
360 /* thermal cooling device callbacks */
361 static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
362 {
363 struct acpi_device *device = cdev->devdata;
364 struct acpi_video_device *video = acpi_driver_data(device);
365
366 return sprintf(buf, "%d\n", video->brightness->count - 3);
367 }
368
369 static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
370 {
371 struct acpi_device *device = cdev->devdata;
372 struct acpi_video_device *video = acpi_driver_data(device);
373 unsigned long level;
374 int state;
375
376 acpi_video_device_lcd_get_level_current(video, &level);
377 for (state = 2; state < video->brightness->count; state++)
378 if (level == video->brightness->levels[state])
379 return sprintf(buf, "%d\n",
380 video->brightness->count - state - 1);
381
382 return -EINVAL;
383 }
384
385 static int
386 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
387 {
388 struct acpi_device *device = cdev->devdata;
389 struct acpi_video_device *video = acpi_driver_data(device);
390 int level;
391
392 if ( state >= video->brightness->count - 2)
393 return -EINVAL;
394
395 state = video->brightness->count - state;
396 level = video->brightness->levels[state -1];
397 return acpi_video_device_lcd_set_level(video, level);
398 }
399
400 static struct thermal_cooling_device_ops video_cooling_ops = {
401 .get_max_state = video_get_max_state,
402 .get_cur_state = video_get_cur_state,
403 .set_cur_state = video_set_cur_state,
404 };
405
406 /* --------------------------------------------------------------------------
407 Video Management
408 -------------------------------------------------------------------------- */
409
410 /* device */
411
412 static int
413 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
414 {
415 int status;
416
417 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
418
419 return status;
420 }
421
422 static int
423 acpi_video_device_get_state(struct acpi_video_device *device,
424 unsigned long *state)
425 {
426 int status;
427
428 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
429
430 return status;
431 }
432
433 static int
434 acpi_video_device_set_state(struct acpi_video_device *device, int state)
435 {
436 int status;
437 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
438 struct acpi_object_list args = { 1, &arg0 };
439 unsigned long ret;
440
441
442 arg0.integer.value = state;
443 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
444
445 return status;
446 }
447
448 static int
449 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
450 union acpi_object **levels)
451 {
452 int status;
453 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
454 union acpi_object *obj;
455
456
457 *levels = NULL;
458
459 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
460 if (!ACPI_SUCCESS(status))
461 return status;
462 obj = (union acpi_object *)buffer.pointer;
463 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
464 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
465 status = -EFAULT;
466 goto err;
467 }
468
469 *levels = obj;
470
471 return 0;
472
473 err:
474 kfree(buffer.pointer);
475
476 return status;
477 }
478
479 static int
480 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
481 {
482 int status = AE_OK;
483 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
484 struct acpi_object_list args = { 1, &arg0 };
485
486
487 arg0.integer.value = level;
488
489 if (device->cap._BCM)
490 status = acpi_evaluate_object(device->dev->handle, "_BCM",
491 &args, NULL);
492 device->brightness->curr = level;
493 return status;
494 }
495
496 static int
497 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
498 unsigned long *level)
499 {
500 if (device->cap._BQC)
501 return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
502 level);
503 *level = device->brightness->curr;
504 return AE_OK;
505 }
506
507 static int
508 acpi_video_device_EDID(struct acpi_video_device *device,
509 union acpi_object **edid, ssize_t length)
510 {
511 int status;
512 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
513 union acpi_object *obj;
514 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
515 struct acpi_object_list args = { 1, &arg0 };
516
517
518 *edid = NULL;
519
520 if (!device)
521 return -ENODEV;
522 if (length == 128)
523 arg0.integer.value = 1;
524 else if (length == 256)
525 arg0.integer.value = 2;
526 else
527 return -EINVAL;
528
529 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
530 if (ACPI_FAILURE(status))
531 return -ENODEV;
532
533 obj = buffer.pointer;
534
535 if (obj && obj->type == ACPI_TYPE_BUFFER)
536 *edid = obj;
537 else {
538 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
539 status = -EFAULT;
540 kfree(obj);
541 }
542
543 return status;
544 }
545
546 /* bus */
547
548 static int
549 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
550 {
551 int status;
552 unsigned long tmp;
553 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
554 struct acpi_object_list args = { 1, &arg0 };
555
556
557 arg0.integer.value = option;
558
559 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
560 if (ACPI_SUCCESS(status))
561 status = tmp ? (-EINVAL) : (AE_OK);
562
563 return status;
564 }
565
566 static int
567 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
568 {
569 int status;
570
571 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
572
573 return status;
574 }
575
576 static int
577 acpi_video_bus_POST_options(struct acpi_video_bus *video,
578 unsigned long *options)
579 {
580 int status;
581
582 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
583 *options &= 3;
584
585 return status;
586 }
587
588 /*
589 * Arg:
590 * video : video bus device pointer
591 * bios_flag :
592 * 0. The system BIOS should NOT automatically switch(toggle)
593 * the active display output.
594 * 1. The system BIOS should automatically switch (toggle) the
595 * active display output. No switch event.
596 * 2. The _DGS value should be locked.
597 * 3. The system BIOS should not automatically switch (toggle) the
598 * active display output, but instead generate the display switch
599 * event notify code.
600 * lcd_flag :
601 * 0. The system BIOS should automatically control the brightness level
602 * of the LCD when the power changes from AC to DC
603 * 1. The system BIOS should NOT automatically control the brightness
604 * level of the LCD when the power changes from AC to DC.
605 * Return Value:
606 * -1 wrong arg.
607 */
608
609 static int
610 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
611 {
612 acpi_integer status = 0;
613 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
614 struct acpi_object_list args = { 1, &arg0 };
615
616
617 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
618 status = -1;
619 goto Failed;
620 }
621 arg0.integer.value = (lcd_flag << 2) | bios_flag;
622 video->dos_setting = arg0.integer.value;
623 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
624
625 Failed:
626 return status;
627 }
628
629 /*
630 * Arg:
631 * device : video output device (LCD, CRT, ..)
632 *
633 * Return Value:
634 * Maximum brightness level
635 *
636 * Allocate and initialize device->brightness.
637 */
638
639 static int
640 acpi_video_init_brightness(struct acpi_video_device *device)
641 {
642 union acpi_object *obj = NULL;
643 int i, max_level = 0, count = 0;
644 union acpi_object *o;
645 struct acpi_video_device_brightness *br = NULL;
646
647 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
648 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
649 "LCD brightness level\n"));
650 goto out;
651 }
652
653 if (obj->package.count < 2)
654 goto out;
655
656 br = kzalloc(sizeof(*br), GFP_KERNEL);
657 if (!br) {
658 printk(KERN_ERR "can't allocate memory\n");
659 goto out;
660 }
661
662 br->levels = kmalloc(obj->package.count * sizeof *(br->levels),
663 GFP_KERNEL);
664 if (!br->levels)
665 goto out_free;
666
667 for (i = 0; i < obj->package.count; i++) {
668 o = (union acpi_object *)&obj->package.elements[i];
669 if (o->type != ACPI_TYPE_INTEGER) {
670 printk(KERN_ERR PREFIX "Invalid data\n");
671 continue;
672 }
673 br->levels[count] = (u32) o->integer.value;
674
675 if (br->levels[count] > max_level)
676 max_level = br->levels[count];
677 count++;
678 }
679
680 if (count < 2)
681 goto out_free_levels;
682
683 br->count = count;
684 device->brightness = br;
685 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "found %d brightness levels\n", count));
686 kfree(obj);
687 return max_level;
688
689 out_free_levels:
690 kfree(br->levels);
691 out_free:
692 kfree(br);
693 out:
694 device->brightness = NULL;
695 kfree(obj);
696 return 0;
697 }
698
699 /*
700 * Arg:
701 * device : video output device (LCD, CRT, ..)
702 *
703 * Return Value:
704 * None
705 *
706 * Find out all required AML methods defined under the output
707 * device.
708 */
709
710 static void acpi_video_device_find_cap(struct acpi_video_device *device)
711 {
712 acpi_handle h_dummy1;
713 u32 max_level = 0;
714
715
716 memset(&device->cap, 0, sizeof(device->cap));
717
718 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
719 device->cap._ADR = 1;
720 }
721 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
722 device->cap._BCL = 1;
723 }
724 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
725 device->cap._BCM = 1;
726 }
727 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
728 device->cap._BQC = 1;
729 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
730 device->cap._DDC = 1;
731 }
732 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
733 device->cap._DCS = 1;
734 }
735 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
736 device->cap._DGS = 1;
737 }
738 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
739 device->cap._DSS = 1;
740 }
741
742 max_level = acpi_video_init_brightness(device);
743
744 if (device->cap._BCL && device->cap._BCM && max_level > 0) {
745 int result;
746 static int count = 0;
747 char *name;
748 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
749 if (!name)
750 return;
751
752 sprintf(name, "acpi_video%d", count++);
753 device->backlight = backlight_device_register(name,
754 NULL, device, &acpi_backlight_ops);
755 device->backlight->props.max_brightness = device->brightness->count-3;
756 /*
757 * If there exists the _BQC object, the _BQC object will be
758 * called to get the current backlight brightness. Otherwise
759 * the brightness will be set to the maximum.
760 */
761 if (device->cap._BQC)
762 device->backlight->props.brightness =
763 acpi_video_get_brightness(device->backlight);
764 else
765 device->backlight->props.brightness =
766 device->backlight->props.max_brightness;
767 backlight_update_status(device->backlight);
768 kfree(name);
769
770 device->cdev = thermal_cooling_device_register("LCD",
771 device->dev, &video_cooling_ops);
772 if (IS_ERR(device->cdev))
773 return;
774
775 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
776 device->cdev->id);
777 result = sysfs_create_link(&device->dev->dev.kobj,
778 &device->cdev->device.kobj,
779 "thermal_cooling");
780 if (result)
781 printk(KERN_ERR PREFIX "Create sysfs link\n");
782 result = sysfs_create_link(&device->cdev->device.kobj,
783 &device->dev->dev.kobj, "device");
784 if (result)
785 printk(KERN_ERR PREFIX "Create sysfs link\n");
786
787 }
788 if (device->cap._DCS && device->cap._DSS){
789 static int count = 0;
790 char *name;
791 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
792 if (!name)
793 return;
794 sprintf(name, "acpi_video%d", count++);
795 device->output_dev = video_output_register(name,
796 NULL, device, &acpi_output_properties);
797 kfree(name);
798 }
799 return;
800 }
801
802 /*
803 * Arg:
804 * device : video output device (VGA)
805 *
806 * Return Value:
807 * None
808 *
809 * Find out all required AML methods defined under the video bus device.
810 */
811
812 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
813 {
814 acpi_handle h_dummy1;
815
816 memset(&video->cap, 0, sizeof(video->cap));
817 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
818 video->cap._DOS = 1;
819 }
820 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
821 video->cap._DOD = 1;
822 }
823 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
824 video->cap._ROM = 1;
825 }
826 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
827 video->cap._GPD = 1;
828 }
829 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
830 video->cap._SPD = 1;
831 }
832 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
833 video->cap._VPO = 1;
834 }
835 }
836
837 /*
838 * Check whether the video bus device has required AML method to
839 * support the desired features
840 */
841
842 static int acpi_video_bus_check(struct acpi_video_bus *video)
843 {
844 acpi_status status = -ENOENT;
845
846
847 if (!video)
848 return -EINVAL;
849
850 /* Since there is no HID, CID and so on for VGA driver, we have
851 * to check well known required nodes.
852 */
853
854 /* Does this device support video switching? */
855 if (video->cap._DOS) {
856 video->flags.multihead = 1;
857 status = 0;
858 }
859
860 /* Does this device support retrieving a video ROM? */
861 if (video->cap._ROM) {
862 video->flags.rom = 1;
863 status = 0;
864 }
865
866 /* Does this device support configuring which video device to POST? */
867 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
868 video->flags.post = 1;
869 status = 0;
870 }
871
872 return status;
873 }
874
875 /* --------------------------------------------------------------------------
876 FS Interface (/proc)
877 -------------------------------------------------------------------------- */
878
879 static struct proc_dir_entry *acpi_video_dir;
880
881 /* video devices */
882
883 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
884 {
885 struct acpi_video_device *dev = seq->private;
886
887
888 if (!dev)
889 goto end;
890
891 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
892 seq_printf(seq, "type: ");
893 if (dev->flags.crt)
894 seq_printf(seq, "CRT\n");
895 else if (dev->flags.lcd)
896 seq_printf(seq, "LCD\n");
897 else if (dev->flags.tvout)
898 seq_printf(seq, "TVOUT\n");
899 else if (dev->flags.dvi)
900 seq_printf(seq, "DVI\n");
901 else
902 seq_printf(seq, "UNKNOWN\n");
903
904 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
905
906 end:
907 return 0;
908 }
909
910 static int
911 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
912 {
913 return single_open(file, acpi_video_device_info_seq_show,
914 PDE(inode)->data);
915 }
916
917 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
918 {
919 int status;
920 struct acpi_video_device *dev = seq->private;
921 unsigned long state;
922
923
924 if (!dev)
925 goto end;
926
927 status = acpi_video_device_get_state(dev, &state);
928 seq_printf(seq, "state: ");
929 if (ACPI_SUCCESS(status))
930 seq_printf(seq, "0x%02lx\n", state);
931 else
932 seq_printf(seq, "<not supported>\n");
933
934 status = acpi_video_device_query(dev, &state);
935 seq_printf(seq, "query: ");
936 if (ACPI_SUCCESS(status))
937 seq_printf(seq, "0x%02lx\n", state);
938 else
939 seq_printf(seq, "<not supported>\n");
940
941 end:
942 return 0;
943 }
944
945 static int
946 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
947 {
948 return single_open(file, acpi_video_device_state_seq_show,
949 PDE(inode)->data);
950 }
951
952 static ssize_t
953 acpi_video_device_write_state(struct file *file,
954 const char __user * buffer,
955 size_t count, loff_t * data)
956 {
957 int status;
958 struct seq_file *m = file->private_data;
959 struct acpi_video_device *dev = m->private;
960 char str[12] = { 0 };
961 u32 state = 0;
962
963
964 if (!dev || count + 1 > sizeof str)
965 return -EINVAL;
966
967 if (copy_from_user(str, buffer, count))
968 return -EFAULT;
969
970 str[count] = 0;
971 state = simple_strtoul(str, NULL, 0);
972 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
973
974 status = acpi_video_device_set_state(dev, state);
975
976 if (status)
977 return -EFAULT;
978
979 return count;
980 }
981
982 static int
983 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
984 {
985 struct acpi_video_device *dev = seq->private;
986 int i;
987
988
989 if (!dev || !dev->brightness) {
990 seq_printf(seq, "<not supported>\n");
991 return 0;
992 }
993
994 seq_printf(seq, "levels: ");
995 for (i = 0; i < dev->brightness->count; i++)
996 seq_printf(seq, " %d", dev->brightness->levels[i]);
997 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
998
999 return 0;
1000 }
1001
1002 static int
1003 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1004 {
1005 return single_open(file, acpi_video_device_brightness_seq_show,
1006 PDE(inode)->data);
1007 }
1008
1009 static ssize_t
1010 acpi_video_device_write_brightness(struct file *file,
1011 const char __user * buffer,
1012 size_t count, loff_t * data)
1013 {
1014 struct seq_file *m = file->private_data;
1015 struct acpi_video_device *dev = m->private;
1016 char str[5] = { 0 };
1017 unsigned int level = 0;
1018 int i;
1019
1020
1021 if (!dev || !dev->brightness || count + 1 > sizeof str)
1022 return -EINVAL;
1023
1024 if (copy_from_user(str, buffer, count))
1025 return -EFAULT;
1026
1027 str[count] = 0;
1028 level = simple_strtoul(str, NULL, 0);
1029
1030 if (level > 100)
1031 return -EFAULT;
1032
1033 /* validate through the list of available levels */
1034 for (i = 0; i < dev->brightness->count; i++)
1035 if (level == dev->brightness->levels[i]) {
1036 if (ACPI_SUCCESS
1037 (acpi_video_device_lcd_set_level(dev, level)))
1038 dev->brightness->curr = level;
1039 break;
1040 }
1041
1042 return count;
1043 }
1044
1045 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1046 {
1047 struct acpi_video_device *dev = seq->private;
1048 int status;
1049 int i;
1050 union acpi_object *edid = NULL;
1051
1052
1053 if (!dev)
1054 goto out;
1055
1056 status = acpi_video_device_EDID(dev, &edid, 128);
1057 if (ACPI_FAILURE(status)) {
1058 status = acpi_video_device_EDID(dev, &edid, 256);
1059 }
1060
1061 if (ACPI_FAILURE(status)) {
1062 goto out;
1063 }
1064
1065 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1066 for (i = 0; i < edid->buffer.length; i++)
1067 seq_putc(seq, edid->buffer.pointer[i]);
1068 }
1069
1070 out:
1071 if (!edid)
1072 seq_printf(seq, "<not supported>\n");
1073 else
1074 kfree(edid);
1075
1076 return 0;
1077 }
1078
1079 static int
1080 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1081 {
1082 return single_open(file, acpi_video_device_EDID_seq_show,
1083 PDE(inode)->data);
1084 }
1085
1086 static int acpi_video_device_add_fs(struct acpi_device *device)
1087 {
1088 struct proc_dir_entry *entry, *device_dir;
1089 struct acpi_video_device *vid_dev;
1090
1091 vid_dev = acpi_driver_data(device);
1092 if (!vid_dev)
1093 return -ENODEV;
1094
1095 device_dir = proc_mkdir(acpi_device_bid(device),
1096 vid_dev->video->dir);
1097 if (!device_dir)
1098 return -ENOMEM;
1099
1100 device_dir->owner = THIS_MODULE;
1101
1102 /* 'info' [R] */
1103 entry = proc_create_data("info", S_IRUGO, device_dir,
1104 &acpi_video_device_info_fops, acpi_driver_data(device));
1105 if (!entry)
1106 goto err_remove_dir;
1107
1108 /* 'state' [R/W] */
1109 acpi_video_device_state_fops.write = acpi_video_device_write_state;
1110 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1111 device_dir,
1112 &acpi_video_device_state_fops,
1113 acpi_driver_data(device));
1114 if (!entry)
1115 goto err_remove_info;
1116
1117 /* 'brightness' [R/W] */
1118 acpi_video_device_brightness_fops.write =
1119 acpi_video_device_write_brightness;
1120 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1121 device_dir,
1122 &acpi_video_device_brightness_fops,
1123 acpi_driver_data(device));
1124 if (!entry)
1125 goto err_remove_state;
1126
1127 /* 'EDID' [R] */
1128 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1129 &acpi_video_device_EDID_fops,
1130 acpi_driver_data(device));
1131 if (!entry)
1132 goto err_remove_brightness;
1133
1134 acpi_device_dir(device) = device_dir;
1135
1136 return 0;
1137
1138 err_remove_brightness:
1139 remove_proc_entry("brightness", device_dir);
1140 err_remove_state:
1141 remove_proc_entry("state", device_dir);
1142 err_remove_info:
1143 remove_proc_entry("info", device_dir);
1144 err_remove_dir:
1145 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1146 return -ENOMEM;
1147 }
1148
1149 static int acpi_video_device_remove_fs(struct acpi_device *device)
1150 {
1151 struct acpi_video_device *vid_dev;
1152 struct proc_dir_entry *device_dir;
1153
1154 vid_dev = acpi_driver_data(device);
1155 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1156 return -ENODEV;
1157
1158 device_dir = acpi_device_dir(device);
1159 if (device_dir) {
1160 remove_proc_entry("info", device_dir);
1161 remove_proc_entry("state", device_dir);
1162 remove_proc_entry("brightness", device_dir);
1163 remove_proc_entry("EDID", device_dir);
1164 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1165 acpi_device_dir(device) = NULL;
1166 }
1167
1168 return 0;
1169 }
1170
1171 /* video bus */
1172 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1173 {
1174 struct acpi_video_bus *video = seq->private;
1175
1176
1177 if (!video)
1178 goto end;
1179
1180 seq_printf(seq, "Switching heads: %s\n",
1181 video->flags.multihead ? "yes" : "no");
1182 seq_printf(seq, "Video ROM: %s\n",
1183 video->flags.rom ? "yes" : "no");
1184 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1185 video->flags.post ? "yes" : "no");
1186
1187 end:
1188 return 0;
1189 }
1190
1191 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1192 {
1193 return single_open(file, acpi_video_bus_info_seq_show,
1194 PDE(inode)->data);
1195 }
1196
1197 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1198 {
1199 struct acpi_video_bus *video = seq->private;
1200
1201
1202 if (!video)
1203 goto end;
1204
1205 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1206 seq_printf(seq, "<TODO>\n");
1207
1208 end:
1209 return 0;
1210 }
1211
1212 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1213 {
1214 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1215 }
1216
1217 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1218 {
1219 struct acpi_video_bus *video = seq->private;
1220 unsigned long options;
1221 int status;
1222
1223
1224 if (!video)
1225 goto end;
1226
1227 status = acpi_video_bus_POST_options(video, &options);
1228 if (ACPI_SUCCESS(status)) {
1229 if (!(options & 1)) {
1230 printk(KERN_WARNING PREFIX
1231 "The motherboard VGA device is not listed as a possible POST device.\n");
1232 printk(KERN_WARNING PREFIX
1233 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1234 }
1235 printk("%lx\n", options);
1236 seq_printf(seq, "can POST: <integrated video>");
1237 if (options & 2)
1238 seq_printf(seq, " <PCI video>");
1239 if (options & 4)
1240 seq_printf(seq, " <AGP video>");
1241 seq_putc(seq, '\n');
1242 } else
1243 seq_printf(seq, "<not supported>\n");
1244 end:
1245 return 0;
1246 }
1247
1248 static int
1249 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1250 {
1251 return single_open(file, acpi_video_bus_POST_info_seq_show,
1252 PDE(inode)->data);
1253 }
1254
1255 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1256 {
1257 struct acpi_video_bus *video = seq->private;
1258 int status;
1259 unsigned long id;
1260
1261
1262 if (!video)
1263 goto end;
1264
1265 status = acpi_video_bus_get_POST(video, &id);
1266 if (!ACPI_SUCCESS(status)) {
1267 seq_printf(seq, "<not supported>\n");
1268 goto end;
1269 }
1270 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1271
1272 end:
1273 return 0;
1274 }
1275
1276 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1277 {
1278 struct acpi_video_bus *video = seq->private;
1279
1280
1281 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1282
1283 return 0;
1284 }
1285
1286 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1287 {
1288 return single_open(file, acpi_video_bus_POST_seq_show,
1289 PDE(inode)->data);
1290 }
1291
1292 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1293 {
1294 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1295 }
1296
1297 static ssize_t
1298 acpi_video_bus_write_POST(struct file *file,
1299 const char __user * buffer,
1300 size_t count, loff_t * data)
1301 {
1302 int status;
1303 struct seq_file *m = file->private_data;
1304 struct acpi_video_bus *video = m->private;
1305 char str[12] = { 0 };
1306 unsigned long opt, options;
1307
1308
1309 if (!video || count + 1 > sizeof str)
1310 return -EINVAL;
1311
1312 status = acpi_video_bus_POST_options(video, &options);
1313 if (!ACPI_SUCCESS(status))
1314 return -EINVAL;
1315
1316 if (copy_from_user(str, buffer, count))
1317 return -EFAULT;
1318
1319 str[count] = 0;
1320 opt = strtoul(str, NULL, 0);
1321 if (opt > 3)
1322 return -EFAULT;
1323
1324 /* just in case an OEM 'forgot' the motherboard... */
1325 options |= 1;
1326
1327 if (options & (1ul << opt)) {
1328 status = acpi_video_bus_set_POST(video, opt);
1329 if (!ACPI_SUCCESS(status))
1330 return -EFAULT;
1331
1332 }
1333
1334 return count;
1335 }
1336
1337 static ssize_t
1338 acpi_video_bus_write_DOS(struct file *file,
1339 const char __user * buffer,
1340 size_t count, loff_t * data)
1341 {
1342 int status;
1343 struct seq_file *m = file->private_data;
1344 struct acpi_video_bus *video = m->private;
1345 char str[12] = { 0 };
1346 unsigned long opt;
1347
1348
1349 if (!video || count + 1 > sizeof str)
1350 return -EINVAL;
1351
1352 if (copy_from_user(str, buffer, count))
1353 return -EFAULT;
1354
1355 str[count] = 0;
1356 opt = strtoul(str, NULL, 0);
1357 if (opt > 7)
1358 return -EFAULT;
1359
1360 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1361
1362 if (!ACPI_SUCCESS(status))
1363 return -EFAULT;
1364
1365 return count;
1366 }
1367
1368 static int acpi_video_bus_add_fs(struct acpi_device *device)
1369 {
1370 struct acpi_video_bus *video = acpi_driver_data(device);
1371 struct proc_dir_entry *device_dir;
1372 struct proc_dir_entry *entry;
1373
1374 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1375 if (!device_dir)
1376 return -ENOMEM;
1377
1378 device_dir->owner = THIS_MODULE;
1379
1380 /* 'info' [R] */
1381 entry = proc_create_data("info", S_IRUGO, device_dir,
1382 &acpi_video_bus_info_fops,
1383 acpi_driver_data(device));
1384 if (!entry)
1385 goto err_remove_dir;
1386
1387 /* 'ROM' [R] */
1388 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1389 &acpi_video_bus_ROM_fops,
1390 acpi_driver_data(device));
1391 if (!entry)
1392 goto err_remove_info;
1393
1394 /* 'POST_info' [R] */
1395 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1396 &acpi_video_bus_POST_info_fops,
1397 acpi_driver_data(device));
1398 if (!entry)
1399 goto err_remove_rom;
1400
1401 /* 'POST' [R/W] */
1402 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1403 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1404 device_dir,
1405 &acpi_video_bus_POST_fops,
1406 acpi_driver_data(device));
1407 if (!entry)
1408 goto err_remove_post_info;
1409
1410 /* 'DOS' [R/W] */
1411 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1412 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1413 device_dir,
1414 &acpi_video_bus_DOS_fops,
1415 acpi_driver_data(device));
1416 if (!entry)
1417 goto err_remove_post;
1418
1419 video->dir = acpi_device_dir(device) = device_dir;
1420 return 0;
1421
1422 err_remove_post:
1423 remove_proc_entry("POST", device_dir);
1424 err_remove_post_info:
1425 remove_proc_entry("POST_info", device_dir);
1426 err_remove_rom:
1427 remove_proc_entry("ROM", device_dir);
1428 err_remove_info:
1429 remove_proc_entry("info", device_dir);
1430 err_remove_dir:
1431 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1432 return -ENOMEM;
1433 }
1434
1435 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1436 {
1437 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1438
1439 if (device_dir) {
1440 remove_proc_entry("info", device_dir);
1441 remove_proc_entry("ROM", device_dir);
1442 remove_proc_entry("POST_info", device_dir);
1443 remove_proc_entry("POST", device_dir);
1444 remove_proc_entry("DOS", device_dir);
1445 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1446 acpi_device_dir(device) = NULL;
1447 }
1448
1449 return 0;
1450 }
1451
1452 /* --------------------------------------------------------------------------
1453 Driver Interface
1454 -------------------------------------------------------------------------- */
1455
1456 /* device interface */
1457 static struct acpi_video_device_attrib*
1458 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1459 {
1460 struct acpi_video_enumerated_device *ids;
1461 int i;
1462
1463 for (i = 0; i < video->attached_count; i++) {
1464 ids = &video->attached_array[i];
1465 if ((ids->value.int_val & 0xffff) == device_id)
1466 return &ids->value.attrib;
1467 }
1468
1469 return NULL;
1470 }
1471
1472 static int
1473 acpi_video_bus_get_one_device(struct acpi_device *device,
1474 struct acpi_video_bus *video)
1475 {
1476 unsigned long device_id;
1477 int status;
1478 struct acpi_video_device *data;
1479 struct acpi_video_device_attrib* attribute;
1480
1481 if (!device || !video)
1482 return -EINVAL;
1483
1484 status =
1485 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1486 if (ACPI_SUCCESS(status)) {
1487
1488 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1489 if (!data)
1490 return -ENOMEM;
1491
1492 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1493 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1494 acpi_driver_data(device) = data;
1495
1496 data->device_id = device_id;
1497 data->video = video;
1498 data->dev = device;
1499
1500 attribute = acpi_video_get_device_attr(video, device_id);
1501
1502 if((attribute != NULL) && attribute->device_id_scheme) {
1503 switch (attribute->display_type) {
1504 case ACPI_VIDEO_DISPLAY_CRT:
1505 data->flags.crt = 1;
1506 break;
1507 case ACPI_VIDEO_DISPLAY_TV:
1508 data->flags.tvout = 1;
1509 break;
1510 case ACPI_VIDEO_DISPLAY_DVI:
1511 data->flags.dvi = 1;
1512 break;
1513 case ACPI_VIDEO_DISPLAY_LCD:
1514 data->flags.lcd = 1;
1515 break;
1516 default:
1517 data->flags.unknown = 1;
1518 break;
1519 }
1520 if(attribute->bios_can_detect)
1521 data->flags.bios = 1;
1522 } else
1523 data->flags.unknown = 1;
1524
1525 acpi_video_device_bind(video, data);
1526 acpi_video_device_find_cap(data);
1527
1528 status = acpi_install_notify_handler(device->handle,
1529 ACPI_DEVICE_NOTIFY,
1530 acpi_video_device_notify,
1531 data);
1532 if (ACPI_FAILURE(status)) {
1533 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1534 "Error installing notify handler\n"));
1535 if(data->brightness)
1536 kfree(data->brightness->levels);
1537 kfree(data->brightness);
1538 kfree(data);
1539 return -ENODEV;
1540 }
1541
1542 mutex_lock(&video->device_list_lock);
1543 list_add_tail(&data->entry, &video->video_device_list);
1544 mutex_unlock(&video->device_list_lock);
1545
1546 acpi_video_device_add_fs(device);
1547
1548 return 0;
1549 }
1550
1551 return -ENOENT;
1552 }
1553
1554 /*
1555 * Arg:
1556 * video : video bus device
1557 *
1558 * Return:
1559 * none
1560 *
1561 * Enumerate the video device list of the video bus,
1562 * bind the ids with the corresponding video devices
1563 * under the video bus.
1564 */
1565
1566 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1567 {
1568 struct acpi_video_device *dev;
1569
1570 mutex_lock(&video->device_list_lock);
1571
1572 list_for_each_entry(dev, &video->video_device_list, entry)
1573 acpi_video_device_bind(video, dev);
1574
1575 mutex_unlock(&video->device_list_lock);
1576 }
1577
1578 /*
1579 * Arg:
1580 * video : video bus device
1581 * device : video output device under the video
1582 * bus
1583 *
1584 * Return:
1585 * none
1586 *
1587 * Bind the ids with the corresponding video devices
1588 * under the video bus.
1589 */
1590
1591 static void
1592 acpi_video_device_bind(struct acpi_video_bus *video,
1593 struct acpi_video_device *device)
1594 {
1595 struct acpi_video_enumerated_device *ids;
1596 int i;
1597
1598 for (i = 0; i < video->attached_count; i++) {
1599 ids = &video->attached_array[i];
1600 if (device->device_id == (ids->value.int_val & 0xffff)) {
1601 ids->bind_info = device;
1602 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1603 }
1604 }
1605 }
1606
1607 /*
1608 * Arg:
1609 * video : video bus device
1610 *
1611 * Return:
1612 * < 0 : error
1613 *
1614 * Call _DOD to enumerate all devices attached to display adapter
1615 *
1616 */
1617
1618 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1619 {
1620 int status;
1621 int count;
1622 int i;
1623 struct acpi_video_enumerated_device *active_list;
1624 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1625 union acpi_object *dod = NULL;
1626 union acpi_object *obj;
1627
1628 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1629 if (!ACPI_SUCCESS(status)) {
1630 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1631 return status;
1632 }
1633
1634 dod = buffer.pointer;
1635 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1636 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1637 status = -EFAULT;
1638 goto out;
1639 }
1640
1641 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1642 dod->package.count));
1643
1644 active_list = kcalloc(1 + dod->package.count,
1645 sizeof(struct acpi_video_enumerated_device),
1646 GFP_KERNEL);
1647 if (!active_list) {
1648 status = -ENOMEM;
1649 goto out;
1650 }
1651
1652 count = 0;
1653 for (i = 0; i < dod->package.count; i++) {
1654 obj = &dod->package.elements[i];
1655
1656 if (obj->type != ACPI_TYPE_INTEGER) {
1657 printk(KERN_ERR PREFIX
1658 "Invalid _DOD data in element %d\n", i);
1659 continue;
1660 }
1661
1662 active_list[count].value.int_val = obj->integer.value;
1663 active_list[count].bind_info = NULL;
1664 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1665 (int)obj->integer.value));
1666 count++;
1667 }
1668
1669 kfree(video->attached_array);
1670
1671 video->attached_array = active_list;
1672 video->attached_count = count;
1673
1674 out:
1675 kfree(buffer.pointer);
1676 return status;
1677 }
1678
1679 static int
1680 acpi_video_get_next_level(struct acpi_video_device *device,
1681 u32 level_current, u32 event)
1682 {
1683 int min, max, min_above, max_below, i, l, delta = 255;
1684 max = max_below = 0;
1685 min = min_above = 255;
1686 /* Find closest level to level_current */
1687 for (i = 0; i < device->brightness->count; i++) {
1688 l = device->brightness->levels[i];
1689 if (abs(l - level_current) < abs(delta)) {
1690 delta = l - level_current;
1691 if (!delta)
1692 break;
1693 }
1694 }
1695 /* Ajust level_current to closest available level */
1696 level_current += delta;
1697 for (i = 0; i < device->brightness->count; i++) {
1698 l = device->brightness->levels[i];
1699 if (l < min)
1700 min = l;
1701 if (l > max)
1702 max = l;
1703 if (l < min_above && l > level_current)
1704 min_above = l;
1705 if (l > max_below && l < level_current)
1706 max_below = l;
1707 }
1708
1709 switch (event) {
1710 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1711 return (level_current < max) ? min_above : min;
1712 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1713 return (level_current < max) ? min_above : max;
1714 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1715 return (level_current > min) ? max_below : min;
1716 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1717 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1718 return 0;
1719 default:
1720 return level_current;
1721 }
1722 }
1723
1724 static void
1725 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1726 {
1727 unsigned long level_current, level_next;
1728 if (!device->brightness)
1729 return;
1730 acpi_video_device_lcd_get_level_current(device, &level_current);
1731 level_next = acpi_video_get_next_level(device, level_current, event);
1732 acpi_video_device_lcd_set_level(device, level_next);
1733 }
1734
1735 static int
1736 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1737 struct acpi_device *device)
1738 {
1739 int status = 0;
1740 struct acpi_device *dev;
1741
1742 acpi_video_device_enumerate(video);
1743
1744 list_for_each_entry(dev, &device->children, node) {
1745
1746 status = acpi_video_bus_get_one_device(dev, video);
1747 if (ACPI_FAILURE(status)) {
1748 ACPI_DEBUG_PRINT((ACPI_DB_WARN,
1749 "Cant attach device"));
1750 continue;
1751 }
1752 }
1753 return status;
1754 }
1755
1756 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1757 {
1758 acpi_status status;
1759 struct acpi_video_bus *video;
1760
1761
1762 if (!device || !device->video)
1763 return -ENOENT;
1764
1765 video = device->video;
1766
1767 acpi_video_device_remove_fs(device->dev);
1768
1769 status = acpi_remove_notify_handler(device->dev->handle,
1770 ACPI_DEVICE_NOTIFY,
1771 acpi_video_device_notify);
1772 backlight_device_unregister(device->backlight);
1773 if (device->cdev) {
1774 sysfs_remove_link(&device->dev->dev.kobj,
1775 "thermal_cooling");
1776 sysfs_remove_link(&device->cdev->device.kobj,
1777 "device");
1778 thermal_cooling_device_unregister(device->cdev);
1779 device->cdev = NULL;
1780 }
1781 video_output_unregister(device->output_dev);
1782
1783 return 0;
1784 }
1785
1786 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1787 {
1788 int status;
1789 struct acpi_video_device *dev, *next;
1790
1791 mutex_lock(&video->device_list_lock);
1792
1793 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1794
1795 status = acpi_video_bus_put_one_device(dev);
1796 if (ACPI_FAILURE(status))
1797 printk(KERN_WARNING PREFIX
1798 "hhuuhhuu bug in acpi video driver.\n");
1799
1800 if (dev->brightness) {
1801 kfree(dev->brightness->levels);
1802 kfree(dev->brightness);
1803 }
1804 list_del(&dev->entry);
1805 kfree(dev);
1806 }
1807
1808 mutex_unlock(&video->device_list_lock);
1809
1810 return 0;
1811 }
1812
1813 /* acpi_video interface */
1814
1815 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1816 {
1817 return acpi_video_bus_DOS(video, 0, 0);
1818 }
1819
1820 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1821 {
1822 return acpi_video_bus_DOS(video, 0, 1);
1823 }
1824
1825 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1826 {
1827 struct acpi_video_bus *video = data;
1828 struct acpi_device *device = NULL;
1829 struct input_dev *input;
1830 int keycode;
1831
1832 if (!video)
1833 return;
1834
1835 device = video->device;
1836 input = video->input;
1837
1838 switch (event) {
1839 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
1840 * most likely via hotkey. */
1841 acpi_bus_generate_proc_event(device, event, 0);
1842 keycode = KEY_SWITCHVIDEOMODE;
1843 break;
1844
1845 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
1846 * connector. */
1847 acpi_video_device_enumerate(video);
1848 acpi_video_device_rebind(video);
1849 acpi_bus_generate_proc_event(device, event, 0);
1850 keycode = KEY_SWITCHVIDEOMODE;
1851 break;
1852
1853 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1854 acpi_bus_generate_proc_event(device, event, 0);
1855 keycode = KEY_SWITCHVIDEOMODE;
1856 break;
1857 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1858 acpi_bus_generate_proc_event(device, event, 0);
1859 keycode = KEY_VIDEO_NEXT;
1860 break;
1861 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1862 acpi_bus_generate_proc_event(device, event, 0);
1863 keycode = KEY_VIDEO_PREV;
1864 break;
1865
1866 default:
1867 keycode = KEY_UNKNOWN;
1868 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1869 "Unsupported event [0x%x]\n", event));
1870 break;
1871 }
1872
1873 acpi_notifier_call_chain(device, event, 0);
1874 input_report_key(input, keycode, 1);
1875 input_sync(input);
1876 input_report_key(input, keycode, 0);
1877 input_sync(input);
1878
1879 return;
1880 }
1881
1882 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1883 {
1884 struct acpi_video_device *video_device = data;
1885 struct acpi_device *device = NULL;
1886 struct acpi_video_bus *bus;
1887 struct input_dev *input;
1888 int keycode;
1889
1890 if (!video_device)
1891 return;
1892
1893 device = video_device->dev;
1894 bus = video_device->video;
1895 input = bus->input;
1896
1897 switch (event) {
1898 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1899 if (brightness_switch_enabled)
1900 acpi_video_switch_brightness(video_device, event);
1901 acpi_bus_generate_proc_event(device, event, 0);
1902 keycode = KEY_BRIGHTNESS_CYCLE;
1903 break;
1904 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1905 if (brightness_switch_enabled)
1906 acpi_video_switch_brightness(video_device, event);
1907 acpi_bus_generate_proc_event(device, event, 0);
1908 keycode = KEY_BRIGHTNESSUP;
1909 break;
1910 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1911 if (brightness_switch_enabled)
1912 acpi_video_switch_brightness(video_device, event);
1913 acpi_bus_generate_proc_event(device, event, 0);
1914 keycode = KEY_BRIGHTNESSDOWN;
1915 break;
1916 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1917 if (brightness_switch_enabled)
1918 acpi_video_switch_brightness(video_device, event);
1919 acpi_bus_generate_proc_event(device, event, 0);
1920 keycode = KEY_BRIGHTNESS_ZERO;
1921 break;
1922 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1923 if (brightness_switch_enabled)
1924 acpi_video_switch_brightness(video_device, event);
1925 acpi_bus_generate_proc_event(device, event, 0);
1926 keycode = KEY_DISPLAY_OFF;
1927 break;
1928 default:
1929 keycode = KEY_UNKNOWN;
1930 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1931 "Unsupported event [0x%x]\n", event));
1932 break;
1933 }
1934
1935 acpi_notifier_call_chain(device, event, 0);
1936 input_report_key(input, keycode, 1);
1937 input_sync(input);
1938 input_report_key(input, keycode, 0);
1939 input_sync(input);
1940
1941 return;
1942 }
1943
1944 static int instance;
1945 static int acpi_video_resume(struct acpi_device *device)
1946 {
1947 struct acpi_video_bus *video;
1948 struct acpi_video_device *video_device;
1949 int i;
1950
1951 if (!device || !acpi_driver_data(device))
1952 return -EINVAL;
1953
1954 video = acpi_driver_data(device);
1955
1956 for (i = 0; i < video->attached_count; i++) {
1957 video_device = video->attached_array[i].bind_info;
1958 if (video_device && video_device->backlight)
1959 acpi_video_set_brightness(video_device->backlight);
1960 }
1961 return AE_OK;
1962 }
1963
1964 static int acpi_video_bus_add(struct acpi_device *device)
1965 {
1966 acpi_status status;
1967 struct acpi_video_bus *video;
1968 struct input_dev *input;
1969 int error;
1970
1971 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1972 if (!video)
1973 return -ENOMEM;
1974
1975 /* a hack to fix the duplicate name "VID" problem on T61 */
1976 if (!strcmp(device->pnp.bus_id, "VID")) {
1977 if (instance)
1978 device->pnp.bus_id[3] = '0' + instance;
1979 instance ++;
1980 }
1981
1982 video->device = device;
1983 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1984 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1985 acpi_driver_data(device) = video;
1986
1987 acpi_video_bus_find_cap(video);
1988 error = acpi_video_bus_check(video);
1989 if (error)
1990 goto err_free_video;
1991
1992 error = acpi_video_bus_add_fs(device);
1993 if (error)
1994 goto err_free_video;
1995
1996 mutex_init(&video->device_list_lock);
1997 INIT_LIST_HEAD(&video->video_device_list);
1998
1999 acpi_video_bus_get_devices(video, device);
2000 acpi_video_bus_start_devices(video);
2001
2002 status = acpi_install_notify_handler(device->handle,
2003 ACPI_DEVICE_NOTIFY,
2004 acpi_video_bus_notify, video);
2005 if (ACPI_FAILURE(status)) {
2006 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
2007 "Error installing notify handler\n"));
2008 error = -ENODEV;
2009 goto err_stop_video;
2010 }
2011
2012 video->input = input = input_allocate_device();
2013 if (!input) {
2014 error = -ENOMEM;
2015 goto err_uninstall_notify;
2016 }
2017
2018 snprintf(video->phys, sizeof(video->phys),
2019 "%s/video/input0", acpi_device_hid(video->device));
2020
2021 input->name = acpi_device_name(video->device);
2022 input->phys = video->phys;
2023 input->id.bustype = BUS_HOST;
2024 input->id.product = 0x06;
2025 input->dev.parent = &device->dev;
2026 input->evbit[0] = BIT(EV_KEY);
2027 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2028 set_bit(KEY_VIDEO_NEXT, input->keybit);
2029 set_bit(KEY_VIDEO_PREV, input->keybit);
2030 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2031 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2032 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2033 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2034 set_bit(KEY_DISPLAY_OFF, input->keybit);
2035 set_bit(KEY_UNKNOWN, input->keybit);
2036
2037 error = input_register_device(input);
2038 if (error)
2039 goto err_free_input_dev;
2040
2041 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2042 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2043 video->flags.multihead ? "yes" : "no",
2044 video->flags.rom ? "yes" : "no",
2045 video->flags.post ? "yes" : "no");
2046
2047 return 0;
2048
2049 err_free_input_dev:
2050 input_free_device(input);
2051 err_uninstall_notify:
2052 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
2053 acpi_video_bus_notify);
2054 err_stop_video:
2055 acpi_video_bus_stop_devices(video);
2056 acpi_video_bus_put_devices(video);
2057 kfree(video->attached_array);
2058 acpi_video_bus_remove_fs(device);
2059 err_free_video:
2060 kfree(video);
2061 acpi_driver_data(device) = NULL;
2062
2063 return error;
2064 }
2065
2066 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2067 {
2068 acpi_status status = 0;
2069 struct acpi_video_bus *video = NULL;
2070
2071
2072 if (!device || !acpi_driver_data(device))
2073 return -EINVAL;
2074
2075 video = acpi_driver_data(device);
2076
2077 acpi_video_bus_stop_devices(video);
2078
2079 status = acpi_remove_notify_handler(video->device->handle,
2080 ACPI_DEVICE_NOTIFY,
2081 acpi_video_bus_notify);
2082
2083 acpi_video_bus_put_devices(video);
2084 acpi_video_bus_remove_fs(device);
2085
2086 input_unregister_device(video->input);
2087 kfree(video->attached_array);
2088 kfree(video);
2089
2090 return 0;
2091 }
2092
2093 static int __init acpi_video_init(void)
2094 {
2095 int result = 0;
2096
2097
2098 /*
2099 acpi_dbg_level = 0xFFFFFFFF;
2100 acpi_dbg_layer = 0x08000000;
2101 */
2102
2103 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2104 if (!acpi_video_dir)
2105 return -ENODEV;
2106 acpi_video_dir->owner = THIS_MODULE;
2107
2108 result = acpi_bus_register_driver(&acpi_video_bus);
2109 if (result < 0) {
2110 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2111 return -ENODEV;
2112 }
2113
2114 return 0;
2115 }
2116
2117 static void __exit acpi_video_exit(void)
2118 {
2119
2120 acpi_bus_unregister_driver(&acpi_video_bus);
2121
2122 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2123
2124 return;
2125 }
2126
2127 module_init(acpi_video_init);
2128 module_exit(acpi_video_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree