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