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Linux 2.6.33.13
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / video.c
blobb765790b32be1841d652d3e834c6013950700efc
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <linux/sort.h>
40 #include <linux/pci.h>
41 #include <linux/pci_ids.h>
42 #include <asm/uaccess.h>
43 #include <linux/dmi.h>
44 #include <acpi/acpi_bus.h>
45 #include <acpi/acpi_drivers.h>
46
47 #define PREFIX "ACPI: "
48
49 #define ACPI_VIDEO_CLASS "video"
50 #define ACPI_VIDEO_BUS_NAME "Video Bus"
51 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
52 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
53 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
54 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
55 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
56 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
57
58 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
59 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
60 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
61 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
62 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
63
64 #define MAX_NAME_LEN 20
65
66 #define ACPI_VIDEO_DISPLAY_CRT 1
67 #define ACPI_VIDEO_DISPLAY_TV 2
68 #define ACPI_VIDEO_DISPLAY_DVI 3
69 #define ACPI_VIDEO_DISPLAY_LCD 4
70
71 #define _COMPONENT ACPI_VIDEO_COMPONENT
72 ACPI_MODULE_NAME("video");
73
74 MODULE_AUTHOR("Bruno Ducrot");
75 MODULE_DESCRIPTION("ACPI Video Driver");
76 MODULE_LICENSE("GPL");
77
78 static int brightness_switch_enabled = 1;
79 module_param(brightness_switch_enabled, bool, 0644);
80
81 /*
82 * By default, we don't allow duplicate ACPI video bus devices
83 * under the same VGA controller
84 */
85 static int allow_duplicates;
86 module_param(allow_duplicates, bool, 0644);
87
88 static int register_count = 0;
89 static int acpi_video_bus_add(struct acpi_device *device);
90 static int acpi_video_bus_remove(struct acpi_device *device, int type);
91 static int acpi_video_resume(struct acpi_device *device);
92 static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
93
94 static const struct acpi_device_id video_device_ids[] = {
95 {ACPI_VIDEO_HID, 0},
96 {"", 0},
97 };
98 MODULE_DEVICE_TABLE(acpi, video_device_ids);
99
100 static struct acpi_driver acpi_video_bus = {
101 .name = "video",
102 .class = ACPI_VIDEO_CLASS,
103 .ids = video_device_ids,
104 .ops = {
105 .add = acpi_video_bus_add,
106 .remove = acpi_video_bus_remove,
107 .resume = acpi_video_resume,
108 .notify = acpi_video_bus_notify,
109 },
110 };
111
112 struct acpi_video_bus_flags {
113 u8 multihead:1; /* can switch video heads */
114 u8 rom:1; /* can retrieve a video rom */
115 u8 post:1; /* can configure the head to */
116 u8 reserved:5;
117 };
118
119 struct acpi_video_bus_cap {
120 u8 _DOS:1; /*Enable/Disable output switching */
121 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
122 u8 _ROM:1; /*Get ROM Data */
123 u8 _GPD:1; /*Get POST Device */
124 u8 _SPD:1; /*Set POST Device */
125 u8 _VPO:1; /*Video POST Options */
126 u8 reserved:2;
127 };
128
129 struct acpi_video_device_attrib {
130 u32 display_index:4; /* A zero-based instance of the Display */
131 u32 display_port_attachment:4; /*This field differentiates the display type */
132 u32 display_type:4; /*Describe the specific type in use */
133 u32 vendor_specific:4; /*Chipset Vendor Specific */
134 u32 bios_can_detect:1; /*BIOS can detect the device */
135 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
136 the VGA device. */
137 u32 pipe_id:3; /*For VGA multiple-head devices. */
138 u32 reserved:10; /*Must be 0 */
139 u32 device_id_scheme:1; /*Device ID Scheme */
140 };
141
142 struct acpi_video_enumerated_device {
143 union {
144 u32 int_val;
145 struct acpi_video_device_attrib attrib;
146 } value;
147 struct acpi_video_device *bind_info;
148 };
149
150 struct acpi_video_bus {
151 struct acpi_device *device;
152 u8 dos_setting;
153 struct acpi_video_enumerated_device *attached_array;
154 u8 attached_count;
155 struct acpi_video_bus_cap cap;
156 struct acpi_video_bus_flags flags;
157 struct list_head video_device_list;
158 struct mutex device_list_lock; /* protects video_device_list */
159 struct proc_dir_entry *dir;
160 struct input_dev *input;
161 char phys[32]; /* for input device */
162 };
163
164 struct acpi_video_device_flags {
165 u8 crt:1;
166 u8 lcd:1;
167 u8 tvout:1;
168 u8 dvi:1;
169 u8 bios:1;
170 u8 unknown:1;
171 u8 reserved:2;
172 };
173
174 struct acpi_video_device_cap {
175 u8 _ADR:1; /*Return the unique ID */
176 u8 _BCL:1; /*Query list of brightness control levels supported */
177 u8 _BCM:1; /*Set the brightness level */
178 u8 _BQC:1; /* Get current brightness level */
179 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
180 u8 _DDC:1; /*Return the EDID for this device */
181 u8 _DCS:1; /*Return status of output device */
182 u8 _DGS:1; /*Query graphics state */
183 u8 _DSS:1; /*Device state set */
184 };
185
186 struct acpi_video_brightness_flags {
187 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
188 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
189 u8 _BCL_use_index:1; /* levels in _BCL are index values */
190 u8 _BCM_use_index:1; /* input of _BCM is an index value */
191 u8 _BQC_use_index:1; /* _BQC returns an index value */
192 };
193
194 struct acpi_video_device_brightness {
195 int curr;
196 int count;
197 int *levels;
198 struct acpi_video_brightness_flags flags;
199 };
200
201 struct acpi_video_device {
202 unsigned long device_id;
203 struct acpi_video_device_flags flags;
204 struct acpi_video_device_cap cap;
205 struct list_head entry;
206 struct acpi_video_bus *video;
207 struct acpi_device *dev;
208 struct acpi_video_device_brightness *brightness;
209 struct backlight_device *backlight;
210 struct thermal_cooling_device *cooling_dev;
211 struct output_device *output_dev;
212 };
213
214 /* bus */
215 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
216 static const struct file_operations acpi_video_bus_info_fops = {
217 .owner = THIS_MODULE,
218 .open = acpi_video_bus_info_open_fs,
219 .read = seq_read,
220 .llseek = seq_lseek,
221 .release = single_release,
222 };
223
224 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
225 static const struct file_operations acpi_video_bus_ROM_fops = {
226 .owner = THIS_MODULE,
227 .open = acpi_video_bus_ROM_open_fs,
228 .read = seq_read,
229 .llseek = seq_lseek,
230 .release = single_release,
231 };
232
233 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
234 struct file *file);
235 static const struct file_operations acpi_video_bus_POST_info_fops = {
236 .owner = THIS_MODULE,
237 .open = acpi_video_bus_POST_info_open_fs,
238 .read = seq_read,
239 .llseek = seq_lseek,
240 .release = single_release,
241 };
242
243 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
244 static ssize_t acpi_video_bus_write_POST(struct file *file,
245 const char __user *buffer, size_t count, loff_t *data);
246 static const struct file_operations acpi_video_bus_POST_fops = {
247 .owner = THIS_MODULE,
248 .open = acpi_video_bus_POST_open_fs,
249 .read = seq_read,
250 .write = acpi_video_bus_write_POST,
251 .llseek = seq_lseek,
252 .release = single_release,
253 };
254
255 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
256 static ssize_t acpi_video_bus_write_DOS(struct file *file,
257 const char __user *buffer, size_t count, loff_t *data);
258 static const struct file_operations acpi_video_bus_DOS_fops = {
259 .owner = THIS_MODULE,
260 .open = acpi_video_bus_DOS_open_fs,
261 .read = seq_read,
262 .write = acpi_video_bus_write_DOS,
263 .llseek = seq_lseek,
264 .release = single_release,
265 };
266
267 /* device */
268 static int acpi_video_device_info_open_fs(struct inode *inode,
269 struct file *file);
270 static const struct file_operations acpi_video_device_info_fops = {
271 .owner = THIS_MODULE,
272 .open = acpi_video_device_info_open_fs,
273 .read = seq_read,
274 .llseek = seq_lseek,
275 .release = single_release,
276 };
277
278 static int acpi_video_device_state_open_fs(struct inode *inode,
279 struct file *file);
280 static ssize_t acpi_video_device_write_state(struct file *file,
281 const char __user *buffer, size_t count, loff_t *data);
282 static const struct file_operations acpi_video_device_state_fops = {
283 .owner = THIS_MODULE,
284 .open = acpi_video_device_state_open_fs,
285 .read = seq_read,
286 .write = acpi_video_device_write_state,
287 .llseek = seq_lseek,
288 .release = single_release,
289 };
290
291 static int acpi_video_device_brightness_open_fs(struct inode *inode,
292 struct file *file);
293 static ssize_t acpi_video_device_write_brightness(struct file *file,
294 const char __user *buffer, size_t count, loff_t *data);
295 static const struct file_operations acpi_video_device_brightness_fops = {
296 .owner = THIS_MODULE,
297 .open = acpi_video_device_brightness_open_fs,
298 .read = seq_read,
299 .write = acpi_video_device_write_brightness,
300 .llseek = seq_lseek,
301 .release = single_release,
302 };
303
304 static int acpi_video_device_EDID_open_fs(struct inode *inode,
305 struct file *file);
306 static const struct file_operations acpi_video_device_EDID_fops = {
307 .owner = THIS_MODULE,
308 .open = acpi_video_device_EDID_open_fs,
309 .read = seq_read,
310 .llseek = seq_lseek,
311 .release = single_release,
312 };
313
314 static const char device_decode[][30] = {
315 "motherboard VGA device",
316 "PCI VGA device",
317 "AGP VGA device",
318 "UNKNOWN",
319 };
320
321 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
322 static void acpi_video_device_rebind(struct acpi_video_bus *video);
323 static void acpi_video_device_bind(struct acpi_video_bus *video,
324 struct acpi_video_device *device);
325 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
326 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
327 int level);
328 static int acpi_video_device_lcd_get_level_current(
329 struct acpi_video_device *device,
330 unsigned long long *level);
331 static int acpi_video_get_next_level(struct acpi_video_device *device,
332 u32 level_current, u32 event);
333 static int acpi_video_switch_brightness(struct acpi_video_device *device,
334 int event);
335 static int acpi_video_device_get_state(struct acpi_video_device *device,
336 unsigned long long *state);
337 static int acpi_video_output_get(struct output_device *od);
338 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
339
340 /*backlight device sysfs support*/
341 static int acpi_video_get_brightness(struct backlight_device *bd)
342 {
343 unsigned long long cur_level;
344 int i;
345 struct acpi_video_device *vd =
346 (struct acpi_video_device *)bl_get_data(bd);
347
348 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
349 return -EINVAL;
350 for (i = 2; i < vd->brightness->count; i++) {
351 if (vd->brightness->levels[i] == cur_level)
352 /* The first two entries are special - see page 575
353 of the ACPI spec 3.0 */
354 return i-2;
355 }
356 return 0;
357 }
358
359 static int acpi_video_set_brightness(struct backlight_device *bd)
360 {
361 int request_level = bd->props.brightness + 2;
362 struct acpi_video_device *vd =
363 (struct acpi_video_device *)bl_get_data(bd);
364
365 return acpi_video_device_lcd_set_level(vd,
366 vd->brightness->levels[request_level]);
367 }
368
369 static struct backlight_ops acpi_backlight_ops = {
370 .get_brightness = acpi_video_get_brightness,
371 .update_status = acpi_video_set_brightness,
372 };
373
374 /*video output device sysfs support*/
375 static int acpi_video_output_get(struct output_device *od)
376 {
377 unsigned long long state;
378 struct acpi_video_device *vd =
379 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
380 acpi_video_device_get_state(vd, &state);
381 return (int)state;
382 }
383
384 static int acpi_video_output_set(struct output_device *od)
385 {
386 unsigned long state = od->request_state;
387 struct acpi_video_device *vd=
388 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
389 return acpi_video_device_set_state(vd, state);
390 }
391
392 static struct output_properties acpi_output_properties = {
393 .set_state = acpi_video_output_set,
394 .get_status = acpi_video_output_get,
395 };
396
397
398 /* thermal cooling device callbacks */
399 static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned
400 long *state)
401 {
402 struct acpi_device *device = cooling_dev->devdata;
403 struct acpi_video_device *video = acpi_driver_data(device);
404
405 *state = video->brightness->count - 3;
406 return 0;
407 }
408
409 static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned
410 long *state)
411 {
412 struct acpi_device *device = cooling_dev->devdata;
413 struct acpi_video_device *video = acpi_driver_data(device);
414 unsigned long long level;
415 int offset;
416
417 if (acpi_video_device_lcd_get_level_current(video, &level))
418 return -EINVAL;
419 for (offset = 2; offset < video->brightness->count; offset++)
420 if (level == video->brightness->levels[offset]) {
421 *state = video->brightness->count - offset - 1;
422 return 0;
423 }
424
425 return -EINVAL;
426 }
427
428 static int
429 video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state)
430 {
431 struct acpi_device *device = cooling_dev->devdata;
432 struct acpi_video_device *video = acpi_driver_data(device);
433 int level;
434
435 if ( state >= video->brightness->count - 2)
436 return -EINVAL;
437
438 state = video->brightness->count - state;
439 level = video->brightness->levels[state -1];
440 return acpi_video_device_lcd_set_level(video, level);
441 }
442
443 static struct thermal_cooling_device_ops video_cooling_ops = {
444 .get_max_state = video_get_max_state,
445 .get_cur_state = video_get_cur_state,
446 .set_cur_state = video_set_cur_state,
447 };
448
449 /* --------------------------------------------------------------------------
450 Video Management
451 -------------------------------------------------------------------------- */
452
453 /* device */
454
455 static int
456 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
457 {
458 int status;
459
460 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
461
462 return status;
463 }
464
465 static int
466 acpi_video_device_get_state(struct acpi_video_device *device,
467 unsigned long long *state)
468 {
469 int status;
470
471 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
472
473 return status;
474 }
475
476 static int
477 acpi_video_device_set_state(struct acpi_video_device *device, int state)
478 {
479 int status;
480 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
481 struct acpi_object_list args = { 1, &arg0 };
482 unsigned long long ret;
483
484
485 arg0.integer.value = state;
486 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
487
488 return status;
489 }
490
491 static int
492 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
493 union acpi_object **levels)
494 {
495 int status;
496 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
497 union acpi_object *obj;
498
499
500 *levels = NULL;
501
502 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
503 if (!ACPI_SUCCESS(status))
504 return status;
505 obj = (union acpi_object *)buffer.pointer;
506 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
507 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
508 status = -EFAULT;
509 goto err;
510 }
511
512 *levels = obj;
513
514 return 0;
515
516 err:
517 kfree(buffer.pointer);
518
519 return status;
520 }
521
522 static int
523 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
524 {
525 int status;
526 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
527 struct acpi_object_list args = { 1, &arg0 };
528 int state;
529
530 arg0.integer.value = level;
531
532 status = acpi_evaluate_object(device->dev->handle, "_BCM",
533 &args, NULL);
534 if (ACPI_FAILURE(status)) {
535 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
536 return -EIO;
537 }
538
539 device->brightness->curr = level;
540 for (state = 2; state < device->brightness->count; state++)
541 if (level == device->brightness->levels[state]) {
542 if (device->backlight)
543 device->backlight->props.brightness = state - 2;
544 return 0;
545 }
546
547 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
548 return -EINVAL;
549 }
550
551 /*
552 * For some buggy _BQC methods, we need to add a constant value to
553 * the _BQC return value to get the actual current brightness level
554 */
555
556 static int bqc_offset_aml_bug_workaround;
557 static int __init video_set_bqc_offset(const struct dmi_system_id *d)
558 {
559 bqc_offset_aml_bug_workaround = 9;
560 return 0;
561 }
562
563 static struct dmi_system_id video_dmi_table[] __initdata = {
564 /*
565 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
566 */
567 {
568 .callback = video_set_bqc_offset,
569 .ident = "Acer Aspire 5720",
570 .matches = {
571 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
572 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
573 },
574 },
575 {
576 .callback = video_set_bqc_offset,
577 .ident = "Acer Aspire 5710Z",
578 .matches = {
579 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
580 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
581 },
582 },
583 {
584 .callback = video_set_bqc_offset,
585 .ident = "eMachines E510",
586 .matches = {
587 DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
588 DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
589 },
590 },
591 {
592 .callback = video_set_bqc_offset,
593 .ident = "Acer Aspire 5315",
594 .matches = {
595 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
596 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
597 },
598 },
599 {
600 .callback = video_set_bqc_offset,
601 .ident = "Acer Aspire 7720",
602 .matches = {
603 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
604 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
605 },
606 },
607 {}
608 };
609
610 static int
611 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
612 unsigned long long *level)
613 {
614 acpi_status status = AE_OK;
615 int i;
616
617 if (device->cap._BQC || device->cap._BCQ) {
618 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
619
620 status = acpi_evaluate_integer(device->dev->handle, buf,
621 NULL, level);
622 if (ACPI_SUCCESS(status)) {
623 if (device->brightness->flags._BQC_use_index) {
624 if (device->brightness->flags._BCL_reversed)
625 *level = device->brightness->count
626 - 3 - (*level);
627 *level = device->brightness->levels[*level + 2];
628
629 }
630 *level += bqc_offset_aml_bug_workaround;
631 for (i = 2; i < device->brightness->count; i++)
632 if (device->brightness->levels[i] == *level) {
633 device->brightness->curr = *level;
634 return 0;
635 }
636 /* BQC returned an invalid level. Stop using it. */
637 ACPI_WARNING((AE_INFO, "%s returned an invalid level",
638 buf));
639 device->cap._BQC = device->cap._BCQ = 0;
640 } else {
641 /* Fixme:
642 * should we return an error or ignore this failure?
643 * dev->brightness->curr is a cached value which stores
644 * the correct current backlight level in most cases.
645 * ACPI video backlight still works w/ buggy _BQC.
646 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
647 */
648 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
649 device->cap._BQC = device->cap._BCQ = 0;
650 }
651 }
652
653 *level = device->brightness->curr;
654 return 0;
655 }
656
657 static int
658 acpi_video_device_EDID(struct acpi_video_device *device,
659 union acpi_object **edid, ssize_t length)
660 {
661 int status;
662 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
663 union acpi_object *obj;
664 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
665 struct acpi_object_list args = { 1, &arg0 };
666
667
668 *edid = NULL;
669
670 if (!device)
671 return -ENODEV;
672 if (length == 128)
673 arg0.integer.value = 1;
674 else if (length == 256)
675 arg0.integer.value = 2;
676 else
677 return -EINVAL;
678
679 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
680 if (ACPI_FAILURE(status))
681 return -ENODEV;
682
683 obj = buffer.pointer;
684
685 if (obj && obj->type == ACPI_TYPE_BUFFER)
686 *edid = obj;
687 else {
688 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
689 status = -EFAULT;
690 kfree(obj);
691 }
692
693 return status;
694 }
695
696 /* bus */
697
698 static int
699 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
700 {
701 int status;
702 unsigned long long tmp;
703 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
704 struct acpi_object_list args = { 1, &arg0 };
705
706
707 arg0.integer.value = option;
708
709 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
710 if (ACPI_SUCCESS(status))
711 status = tmp ? (-EINVAL) : (AE_OK);
712
713 return status;
714 }
715
716 static int
717 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
718 {
719 int status;
720
721 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
722
723 return status;
724 }
725
726 static int
727 acpi_video_bus_POST_options(struct acpi_video_bus *video,
728 unsigned long long *options)
729 {
730 int status;
731
732 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
733 *options &= 3;
734
735 return status;
736 }
737
738 /*
739 * Arg:
740 * video : video bus device pointer
741 * bios_flag :
742 * 0. The system BIOS should NOT automatically switch(toggle)
743 * the active display output.
744 * 1. The system BIOS should automatically switch (toggle) the
745 * active display output. No switch event.
746 * 2. The _DGS value should be locked.
747 * 3. The system BIOS should not automatically switch (toggle) the
748 * active display output, but instead generate the display switch
749 * event notify code.
750 * lcd_flag :
751 * 0. The system BIOS should automatically control the brightness level
752 * of the LCD when the power changes from AC to DC
753 * 1. The system BIOS should NOT automatically control the brightness
754 * level of the LCD when the power changes from AC to DC.
755 * Return Value:
756 * -1 wrong arg.
757 */
758
759 static int
760 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
761 {
762 acpi_integer status = 0;
763 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
764 struct acpi_object_list args = { 1, &arg0 };
765
766
767 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
768 status = -1;
769 goto Failed;
770 }
771 arg0.integer.value = (lcd_flag << 2) | bios_flag;
772 video->dos_setting = arg0.integer.value;
773 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
774
775 Failed:
776 return status;
777 }
778
779 /*
780 * Simple comparison function used to sort backlight levels.
781 */
782
783 static int
784 acpi_video_cmp_level(const void *a, const void *b)
785 {
786 return *(int *)a - *(int *)b;
787 }
788
789 /*
790 * Arg:
791 * device : video output device (LCD, CRT, ..)
792 *
793 * Return Value:
794 * Maximum brightness level
795 *
796 * Allocate and initialize device->brightness.
797 */
798
799 static int
800 acpi_video_init_brightness(struct acpi_video_device *device)
801 {
802 union acpi_object *obj = NULL;
803 int i, max_level = 0, count = 0, level_ac_battery = 0;
804 unsigned long long level, level_old;
805 union acpi_object *o;
806 struct acpi_video_device_brightness *br = NULL;
807 int result = -EINVAL;
808
809 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
810 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
811 "LCD brightness level\n"));
812 goto out;
813 }
814
815 if (obj->package.count < 2)
816 goto out;
817
818 br = kzalloc(sizeof(*br), GFP_KERNEL);
819 if (!br) {
820 printk(KERN_ERR "can't allocate memory\n");
821 result = -ENOMEM;
822 goto out;
823 }
824
825 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
826 GFP_KERNEL);
827 if (!br->levels) {
828 result = -ENOMEM;
829 goto out_free;
830 }
831
832 for (i = 0; i < obj->package.count; i++) {
833 o = (union acpi_object *)&obj->package.elements[i];
834 if (o->type != ACPI_TYPE_INTEGER) {
835 printk(KERN_ERR PREFIX "Invalid data\n");
836 continue;
837 }
838 br->levels[count] = (u32) o->integer.value;
839
840 if (br->levels[count] > max_level)
841 max_level = br->levels[count];
842 count++;
843 }
844
845 /*
846 * some buggy BIOS don't export the levels
847 * when machine is on AC/Battery in _BCL package.
848 * In this case, the first two elements in _BCL packages
849 * are also supported brightness levels that OS should take care of.
850 */
851 for (i = 2; i < count; i++) {
852 if (br->levels[i] == br->levels[0])
853 level_ac_battery++;
854 if (br->levels[i] == br->levels[1])
855 level_ac_battery++;
856 }
857
858 if (level_ac_battery < 2) {
859 level_ac_battery = 2 - level_ac_battery;
860 br->flags._BCL_no_ac_battery_levels = 1;
861 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
862 br->levels[i] = br->levels[i - level_ac_battery];
863 count += level_ac_battery;
864 } else if (level_ac_battery > 2)
865 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
866
867 /* Check if the _BCL package is in a reversed order */
868 if (max_level == br->levels[2]) {
869 br->flags._BCL_reversed = 1;
870 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
871 acpi_video_cmp_level, NULL);
872 } else if (max_level != br->levels[count - 1])
873 ACPI_ERROR((AE_INFO,
874 "Found unordered _BCL package\n"));
875
876 br->count = count;
877 device->brightness = br;
878
879 /* Check the input/output of _BQC/_BCL/_BCM */
880 if ((max_level < 100) && (max_level <= (count - 2)))
881 br->flags._BCL_use_index = 1;
882
883 /*
884 * _BCM is always consistent with _BCL,
885 * at least for all the laptops we have ever seen.
886 */
887 br->flags._BCM_use_index = br->flags._BCL_use_index;
888
889 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
890 br->curr = level = max_level;
891
892 if (!device->cap._BQC)
893 goto set_level;
894
895 result = acpi_video_device_lcd_get_level_current(device, &level_old);
896 if (result)
897 goto out_free_levels;
898
899 /*
900 * Set the level to maximum and check if _BQC uses indexed value
901 */
902 result = acpi_video_device_lcd_set_level(device, max_level);
903 if (result)
904 goto out_free_levels;
905
906 result = acpi_video_device_lcd_get_level_current(device, &level);
907 if (result)
908 goto out_free_levels;
909
910 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
911
912 if (!br->flags._BQC_use_index) {
913 /*
914 * Set the backlight to the initial state.
915 * On some buggy laptops, _BQC returns an uninitialized value
916 * when invoked for the first time, i.e. level_old is invalid.
917 * set the backlight to max_level in this case
918 */
919 for (i = 2; i < br->count; i++)
920 if (level_old == br->levels[i])
921 level = level_old;
922 goto set_level;
923 }
924
925 if (br->flags._BCL_reversed)
926 level_old = (br->count - 1) - level_old;
927 level = br->levels[level_old];
928
929 set_level:
930 result = acpi_video_device_lcd_set_level(device, level);
931 if (result)
932 goto out_free_levels;
933
934 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
935 "found %d brightness levels\n", count - 2));
936 kfree(obj);
937 return result;
938
939 out_free_levels:
940 kfree(br->levels);
941 out_free:
942 kfree(br);
943 out:
944 device->brightness = NULL;
945 kfree(obj);
946 return result;
947 }
948
949 /*
950 * Arg:
951 * device : video output device (LCD, CRT, ..)
952 *
953 * Return Value:
954 * None
955 *
956 * Find out all required AML methods defined under the output
957 * device.
958 */
959
960 static void acpi_video_device_find_cap(struct acpi_video_device *device)
961 {
962 acpi_handle h_dummy1;
963
964 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
965 device->cap._ADR = 1;
966 }
967 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
968 device->cap._BCL = 1;
969 }
970 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
971 device->cap._BCM = 1;
972 }
973 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
974 device->cap._BQC = 1;
975 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
976 &h_dummy1))) {
977 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
978 device->cap._BCQ = 1;
979 }
980
981 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
982 device->cap._DDC = 1;
983 }
984 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
985 device->cap._DCS = 1;
986 }
987 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
988 device->cap._DGS = 1;
989 }
990 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
991 device->cap._DSS = 1;
992 }
993
994 if (acpi_video_backlight_support()) {
995 int result;
996 static int count = 0;
997 char *name;
998
999 result = acpi_video_init_brightness(device);
1000 if (result)
1001 return;
1002 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
1003 if (!name)
1004 return;
1005
1006 sprintf(name, "acpi_video%d", count++);
1007 device->backlight = backlight_device_register(name,
1008 NULL, device, &acpi_backlight_ops);
1009 kfree(name);
1010 if (IS_ERR(device->backlight))
1011 return;
1012 device->backlight->props.max_brightness = device->brightness->count-3;
1013
1014 result = sysfs_create_link(&device->backlight->dev.kobj,
1015 &device->dev->dev.kobj, "device");
1016 if (result)
1017 printk(KERN_ERR PREFIX "Create sysfs link\n");
1018
1019 device->cooling_dev = thermal_cooling_device_register("LCD",
1020 device->dev, &video_cooling_ops);
1021 if (IS_ERR(device->cooling_dev)) {
1022 /*
1023 * Set cooling_dev to NULL so we don't crash trying to
1024 * free it.
1025 * Also, why the hell we are returning early and
1026 * not attempt to register video output if cooling
1027 * device registration failed?
1028 * -- dtor
1029 */
1030 device->cooling_dev = NULL;
1031 return;
1032 }
1033
1034 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
1035 device->cooling_dev->id);
1036 result = sysfs_create_link(&device->dev->dev.kobj,
1037 &device->cooling_dev->device.kobj,
1038 "thermal_cooling");
1039 if (result)
1040 printk(KERN_ERR PREFIX "Create sysfs link\n");
1041 result = sysfs_create_link(&device->cooling_dev->device.kobj,
1042 &device->dev->dev.kobj, "device");
1043 if (result)
1044 printk(KERN_ERR PREFIX "Create sysfs link\n");
1045
1046 }
1047
1048 if (acpi_video_display_switch_support()) {
1049
1050 if (device->cap._DCS && device->cap._DSS) {
1051 static int count;
1052 char *name;
1053 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
1054 if (!name)
1055 return;
1056 sprintf(name, "acpi_video%d", count++);
1057 device->output_dev = video_output_register(name,
1058 NULL, device, &acpi_output_properties);
1059 kfree(name);
1060 }
1061 }
1062 }
1063
1064 /*
1065 * Arg:
1066 * device : video output device (VGA)
1067 *
1068 * Return Value:
1069 * None
1070 *
1071 * Find out all required AML methods defined under the video bus device.
1072 */
1073
1074 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
1075 {
1076 acpi_handle h_dummy1;
1077
1078 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
1079 video->cap._DOS = 1;
1080 }
1081 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
1082 video->cap._DOD = 1;
1083 }
1084 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
1085 video->cap._ROM = 1;
1086 }
1087 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
1088 video->cap._GPD = 1;
1089 }
1090 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
1091 video->cap._SPD = 1;
1092 }
1093 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
1094 video->cap._VPO = 1;
1095 }
1096 }
1097
1098 /*
1099 * Check whether the video bus device has required AML method to
1100 * support the desired features
1101 */
1102
1103 static int acpi_video_bus_check(struct acpi_video_bus *video)
1104 {
1105 acpi_status status = -ENOENT;
1106 struct pci_dev *dev;
1107
1108 if (!video)
1109 return -EINVAL;
1110
1111 dev = acpi_get_pci_dev(video->device->handle);
1112 if (!dev)
1113 return -ENODEV;
1114 pci_dev_put(dev);
1115
1116 /* Since there is no HID, CID and so on for VGA driver, we have
1117 * to check well known required nodes.
1118 */
1119
1120 /* Does this device support video switching? */
1121 if (video->cap._DOS || video->cap._DOD) {
1122 if (!video->cap._DOS) {
1123 printk(KERN_WARNING FW_BUG
1124 "ACPI(%s) defines _DOD but not _DOS\n",
1125 acpi_device_bid(video->device));
1126 }
1127 video->flags.multihead = 1;
1128 status = 0;
1129 }
1130
1131 /* Does this device support retrieving a video ROM? */
1132 if (video->cap._ROM) {
1133 video->flags.rom = 1;
1134 status = 0;
1135 }
1136
1137 /* Does this device support configuring which video device to POST? */
1138 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1139 video->flags.post = 1;
1140 status = 0;
1141 }
1142
1143 return status;
1144 }
1145
1146 /* --------------------------------------------------------------------------
1147 FS Interface (/proc)
1148 -------------------------------------------------------------------------- */
1149
1150 static struct proc_dir_entry *acpi_video_dir;
1151
1152 /* video devices */
1153
1154 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1155 {
1156 struct acpi_video_device *dev = seq->private;
1157
1158
1159 if (!dev)
1160 goto end;
1161
1162 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1163 seq_printf(seq, "type: ");
1164 if (dev->flags.crt)
1165 seq_printf(seq, "CRT\n");
1166 else if (dev->flags.lcd)
1167 seq_printf(seq, "LCD\n");
1168 else if (dev->flags.tvout)
1169 seq_printf(seq, "TVOUT\n");
1170 else if (dev->flags.dvi)
1171 seq_printf(seq, "DVI\n");
1172 else
1173 seq_printf(seq, "UNKNOWN\n");
1174
1175 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1176
1177 end:
1178 return 0;
1179 }
1180
1181 static int
1182 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1183 {
1184 return single_open(file, acpi_video_device_info_seq_show,
1185 PDE(inode)->data);
1186 }
1187
1188 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1189 {
1190 int status;
1191 struct acpi_video_device *dev = seq->private;
1192 unsigned long long state;
1193
1194
1195 if (!dev)
1196 goto end;
1197
1198 status = acpi_video_device_get_state(dev, &state);
1199 seq_printf(seq, "state: ");
1200 if (ACPI_SUCCESS(status))
1201 seq_printf(seq, "0x%02llx\n", state);
1202 else
1203 seq_printf(seq, "<not supported>\n");
1204
1205 status = acpi_video_device_query(dev, &state);
1206 seq_printf(seq, "query: ");
1207 if (ACPI_SUCCESS(status))
1208 seq_printf(seq, "0x%02llx\n", state);
1209 else
1210 seq_printf(seq, "<not supported>\n");
1211
1212 end:
1213 return 0;
1214 }
1215
1216 static int
1217 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1218 {
1219 return single_open(file, acpi_video_device_state_seq_show,
1220 PDE(inode)->data);
1221 }
1222
1223 static ssize_t
1224 acpi_video_device_write_state(struct file *file,
1225 const char __user * buffer,
1226 size_t count, loff_t * data)
1227 {
1228 int status;
1229 struct seq_file *m = file->private_data;
1230 struct acpi_video_device *dev = m->private;
1231 char str[12] = { 0 };
1232 u32 state = 0;
1233
1234
1235 if (!dev || count >= sizeof(str))
1236 return -EINVAL;
1237
1238 if (copy_from_user(str, buffer, count))
1239 return -EFAULT;
1240
1241 str[count] = 0;
1242 state = simple_strtoul(str, NULL, 0);
1243 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1244
1245 status = acpi_video_device_set_state(dev, state);
1246
1247 if (status)
1248 return -EFAULT;
1249
1250 return count;
1251 }
1252
1253 static int
1254 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1255 {
1256 struct acpi_video_device *dev = seq->private;
1257 int i;
1258
1259
1260 if (!dev || !dev->brightness) {
1261 seq_printf(seq, "<not supported>\n");
1262 return 0;
1263 }
1264
1265 seq_printf(seq, "levels: ");
1266 for (i = 2; i < dev->brightness->count; i++)
1267 seq_printf(seq, " %d", dev->brightness->levels[i]);
1268 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1269
1270 return 0;
1271 }
1272
1273 static int
1274 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1275 {
1276 return single_open(file, acpi_video_device_brightness_seq_show,
1277 PDE(inode)->data);
1278 }
1279
1280 static ssize_t
1281 acpi_video_device_write_brightness(struct file *file,
1282 const char __user * buffer,
1283 size_t count, loff_t * data)
1284 {
1285 struct seq_file *m = file->private_data;
1286 struct acpi_video_device *dev = m->private;
1287 char str[5] = { 0 };
1288 unsigned int level = 0;
1289 int i;
1290
1291
1292 if (!dev || !dev->brightness || count >= sizeof(str))
1293 return -EINVAL;
1294
1295 if (copy_from_user(str, buffer, count))
1296 return -EFAULT;
1297
1298 str[count] = 0;
1299 level = simple_strtoul(str, NULL, 0);
1300
1301 if (level > 100)
1302 return -EFAULT;
1303
1304 /* validate through the list of available levels */
1305 for (i = 2; i < dev->brightness->count; i++)
1306 if (level == dev->brightness->levels[i]) {
1307 if (!acpi_video_device_lcd_set_level(dev, level))
1308 return count;
1309 break;
1310 }
1311
1312 return -EINVAL;
1313 }
1314
1315 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1316 {
1317 struct acpi_video_device *dev = seq->private;
1318 int status;
1319 int i;
1320 union acpi_object *edid = NULL;
1321
1322
1323 if (!dev)
1324 goto out;
1325
1326 status = acpi_video_device_EDID(dev, &edid, 128);
1327 if (ACPI_FAILURE(status)) {
1328 status = acpi_video_device_EDID(dev, &edid, 256);
1329 }
1330
1331 if (ACPI_FAILURE(status)) {
1332 goto out;
1333 }
1334
1335 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1336 for (i = 0; i < edid->buffer.length; i++)
1337 seq_putc(seq, edid->buffer.pointer[i]);
1338 }
1339
1340 out:
1341 if (!edid)
1342 seq_printf(seq, "<not supported>\n");
1343 else
1344 kfree(edid);
1345
1346 return 0;
1347 }
1348
1349 static int
1350 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1351 {
1352 return single_open(file, acpi_video_device_EDID_seq_show,
1353 PDE(inode)->data);
1354 }
1355
1356 static int acpi_video_device_add_fs(struct acpi_device *device)
1357 {
1358 struct proc_dir_entry *entry, *device_dir;
1359 struct acpi_video_device *vid_dev;
1360
1361 vid_dev = acpi_driver_data(device);
1362 if (!vid_dev)
1363 return -ENODEV;
1364
1365 device_dir = proc_mkdir(acpi_device_bid(device),
1366 vid_dev->video->dir);
1367 if (!device_dir)
1368 return -ENOMEM;
1369
1370 /* 'info' [R] */
1371 entry = proc_create_data("info", S_IRUGO, device_dir,
1372 &acpi_video_device_info_fops, acpi_driver_data(device));
1373 if (!entry)
1374 goto err_remove_dir;
1375
1376 /* 'state' [R/W] */
1377 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1378 device_dir,
1379 &acpi_video_device_state_fops,
1380 acpi_driver_data(device));
1381 if (!entry)
1382 goto err_remove_info;
1383
1384 /* 'brightness' [R/W] */
1385 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1386 device_dir,
1387 &acpi_video_device_brightness_fops,
1388 acpi_driver_data(device));
1389 if (!entry)
1390 goto err_remove_state;
1391
1392 /* 'EDID' [R] */
1393 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1394 &acpi_video_device_EDID_fops,
1395 acpi_driver_data(device));
1396 if (!entry)
1397 goto err_remove_brightness;
1398
1399 acpi_device_dir(device) = device_dir;
1400
1401 return 0;
1402
1403 err_remove_brightness:
1404 remove_proc_entry("brightness", device_dir);
1405 err_remove_state:
1406 remove_proc_entry("state", device_dir);
1407 err_remove_info:
1408 remove_proc_entry("info", device_dir);
1409 err_remove_dir:
1410 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1411 return -ENOMEM;
1412 }
1413
1414 static int acpi_video_device_remove_fs(struct acpi_device *device)
1415 {
1416 struct acpi_video_device *vid_dev;
1417 struct proc_dir_entry *device_dir;
1418
1419 vid_dev = acpi_driver_data(device);
1420 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1421 return -ENODEV;
1422
1423 device_dir = acpi_device_dir(device);
1424 if (device_dir) {
1425 remove_proc_entry("info", device_dir);
1426 remove_proc_entry("state", device_dir);
1427 remove_proc_entry("brightness", device_dir);
1428 remove_proc_entry("EDID", device_dir);
1429 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1430 acpi_device_dir(device) = NULL;
1431 }
1432
1433 return 0;
1434 }
1435
1436 /* video bus */
1437 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1438 {
1439 struct acpi_video_bus *video = seq->private;
1440
1441
1442 if (!video)
1443 goto end;
1444
1445 seq_printf(seq, "Switching heads: %s\n",
1446 video->flags.multihead ? "yes" : "no");
1447 seq_printf(seq, "Video ROM: %s\n",
1448 video->flags.rom ? "yes" : "no");
1449 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1450 video->flags.post ? "yes" : "no");
1451
1452 end:
1453 return 0;
1454 }
1455
1456 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1457 {
1458 return single_open(file, acpi_video_bus_info_seq_show,
1459 PDE(inode)->data);
1460 }
1461
1462 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1463 {
1464 struct acpi_video_bus *video = seq->private;
1465
1466
1467 if (!video)
1468 goto end;
1469
1470 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1471 seq_printf(seq, "<TODO>\n");
1472
1473 end:
1474 return 0;
1475 }
1476
1477 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1478 {
1479 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1480 }
1481
1482 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1483 {
1484 struct acpi_video_bus *video = seq->private;
1485 unsigned long long options;
1486 int status;
1487
1488
1489 if (!video)
1490 goto end;
1491
1492 status = acpi_video_bus_POST_options(video, &options);
1493 if (ACPI_SUCCESS(status)) {
1494 if (!(options & 1)) {
1495 printk(KERN_WARNING PREFIX
1496 "The motherboard VGA device is not listed as a possible POST device.\n");
1497 printk(KERN_WARNING PREFIX
1498 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1499 }
1500 printk(KERN_WARNING "%llx\n", options);
1501 seq_printf(seq, "can POST: <integrated video>");
1502 if (options & 2)
1503 seq_printf(seq, " <PCI video>");
1504 if (options & 4)
1505 seq_printf(seq, " <AGP video>");
1506 seq_putc(seq, '\n');
1507 } else
1508 seq_printf(seq, "<not supported>\n");
1509 end:
1510 return 0;
1511 }
1512
1513 static int
1514 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1515 {
1516 return single_open(file, acpi_video_bus_POST_info_seq_show,
1517 PDE(inode)->data);
1518 }
1519
1520 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1521 {
1522 struct acpi_video_bus *video = seq->private;
1523 int status;
1524 unsigned long long id;
1525
1526
1527 if (!video)
1528 goto end;
1529
1530 status = acpi_video_bus_get_POST(video, &id);
1531 if (!ACPI_SUCCESS(status)) {
1532 seq_printf(seq, "<not supported>\n");
1533 goto end;
1534 }
1535 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1536
1537 end:
1538 return 0;
1539 }
1540
1541 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1542 {
1543 struct acpi_video_bus *video = seq->private;
1544
1545
1546 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1547
1548 return 0;
1549 }
1550
1551 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1552 {
1553 return single_open(file, acpi_video_bus_POST_seq_show,
1554 PDE(inode)->data);
1555 }
1556
1557 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1558 {
1559 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1560 }
1561
1562 static ssize_t
1563 acpi_video_bus_write_POST(struct file *file,
1564 const char __user * buffer,
1565 size_t count, loff_t * data)
1566 {
1567 int status;
1568 struct seq_file *m = file->private_data;
1569 struct acpi_video_bus *video = m->private;
1570 char str[12] = { 0 };
1571 unsigned long long opt, options;
1572
1573
1574 if (!video || count >= sizeof(str))
1575 return -EINVAL;
1576
1577 status = acpi_video_bus_POST_options(video, &options);
1578 if (!ACPI_SUCCESS(status))
1579 return -EINVAL;
1580
1581 if (copy_from_user(str, buffer, count))
1582 return -EFAULT;
1583
1584 str[count] = 0;
1585 opt = strtoul(str, NULL, 0);
1586 if (opt > 3)
1587 return -EFAULT;
1588
1589 /* just in case an OEM 'forgot' the motherboard... */
1590 options |= 1;
1591
1592 if (options & (1ul << opt)) {
1593 status = acpi_video_bus_set_POST(video, opt);
1594 if (!ACPI_SUCCESS(status))
1595 return -EFAULT;
1596
1597 }
1598
1599 return count;
1600 }
1601
1602 static ssize_t
1603 acpi_video_bus_write_DOS(struct file *file,
1604 const char __user * buffer,
1605 size_t count, loff_t * data)
1606 {
1607 int status;
1608 struct seq_file *m = file->private_data;
1609 struct acpi_video_bus *video = m->private;
1610 char str[12] = { 0 };
1611 unsigned long opt;
1612
1613
1614 if (!video || count >= sizeof(str))
1615 return -EINVAL;
1616
1617 if (copy_from_user(str, buffer, count))
1618 return -EFAULT;
1619
1620 str[count] = 0;
1621 opt = strtoul(str, NULL, 0);
1622 if (opt > 7)
1623 return -EFAULT;
1624
1625 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1626
1627 if (!ACPI_SUCCESS(status))
1628 return -EFAULT;
1629
1630 return count;
1631 }
1632
1633 static int acpi_video_bus_add_fs(struct acpi_device *device)
1634 {
1635 struct acpi_video_bus *video = acpi_driver_data(device);
1636 struct proc_dir_entry *device_dir;
1637 struct proc_dir_entry *entry;
1638
1639 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1640 if (!device_dir)
1641 return -ENOMEM;
1642
1643 /* 'info' [R] */
1644 entry = proc_create_data("info", S_IRUGO, device_dir,
1645 &acpi_video_bus_info_fops,
1646 acpi_driver_data(device));
1647 if (!entry)
1648 goto err_remove_dir;
1649
1650 /* 'ROM' [R] */
1651 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1652 &acpi_video_bus_ROM_fops,
1653 acpi_driver_data(device));
1654 if (!entry)
1655 goto err_remove_info;
1656
1657 /* 'POST_info' [R] */
1658 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1659 &acpi_video_bus_POST_info_fops,
1660 acpi_driver_data(device));
1661 if (!entry)
1662 goto err_remove_rom;
1663
1664 /* 'POST' [R/W] */
1665 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1666 device_dir,
1667 &acpi_video_bus_POST_fops,
1668 acpi_driver_data(device));
1669 if (!entry)
1670 goto err_remove_post_info;
1671
1672 /* 'DOS' [R/W] */
1673 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1674 device_dir,
1675 &acpi_video_bus_DOS_fops,
1676 acpi_driver_data(device));
1677 if (!entry)
1678 goto err_remove_post;
1679
1680 video->dir = acpi_device_dir(device) = device_dir;
1681 return 0;
1682
1683 err_remove_post:
1684 remove_proc_entry("POST", device_dir);
1685 err_remove_post_info:
1686 remove_proc_entry("POST_info", device_dir);
1687 err_remove_rom:
1688 remove_proc_entry("ROM", device_dir);
1689 err_remove_info:
1690 remove_proc_entry("info", device_dir);
1691 err_remove_dir:
1692 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1693 return -ENOMEM;
1694 }
1695
1696 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1697 {
1698 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1699
1700 if (device_dir) {
1701 remove_proc_entry("info", device_dir);
1702 remove_proc_entry("ROM", device_dir);
1703 remove_proc_entry("POST_info", device_dir);
1704 remove_proc_entry("POST", device_dir);
1705 remove_proc_entry("DOS", device_dir);
1706 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1707 acpi_device_dir(device) = NULL;
1708 }
1709
1710 return 0;
1711 }
1712
1713 /* --------------------------------------------------------------------------
1714 Driver Interface
1715 -------------------------------------------------------------------------- */
1716
1717 /* device interface */
1718 static struct acpi_video_device_attrib*
1719 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1720 {
1721 struct acpi_video_enumerated_device *ids;
1722 int i;
1723
1724 for (i = 0; i < video->attached_count; i++) {
1725 ids = &video->attached_array[i];
1726 if ((ids->value.int_val & 0xffff) == device_id)
1727 return &ids->value.attrib;
1728 }
1729
1730 return NULL;
1731 }
1732
1733 static int
1734 acpi_video_bus_get_one_device(struct acpi_device *device,
1735 struct acpi_video_bus *video)
1736 {
1737 unsigned long long device_id;
1738 int status;
1739 struct acpi_video_device *data;
1740 struct acpi_video_device_attrib* attribute;
1741
1742 if (!device || !video)
1743 return -EINVAL;
1744
1745 status =
1746 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1747 if (ACPI_SUCCESS(status)) {
1748
1749 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1750 if (!data)
1751 return -ENOMEM;
1752
1753 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1754 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1755 device->driver_data = data;
1756
1757 data->device_id = device_id;
1758 data->video = video;
1759 data->dev = device;
1760
1761 attribute = acpi_video_get_device_attr(video, device_id);
1762
1763 if((attribute != NULL) && attribute->device_id_scheme) {
1764 switch (attribute->display_type) {
1765 case ACPI_VIDEO_DISPLAY_CRT:
1766 data->flags.crt = 1;
1767 break;
1768 case ACPI_VIDEO_DISPLAY_TV:
1769 data->flags.tvout = 1;
1770 break;
1771 case ACPI_VIDEO_DISPLAY_DVI:
1772 data->flags.dvi = 1;
1773 break;
1774 case ACPI_VIDEO_DISPLAY_LCD:
1775 data->flags.lcd = 1;
1776 break;
1777 default:
1778 data->flags.unknown = 1;
1779 break;
1780 }
1781 if(attribute->bios_can_detect)
1782 data->flags.bios = 1;
1783 } else
1784 data->flags.unknown = 1;
1785
1786 acpi_video_device_bind(video, data);
1787 acpi_video_device_find_cap(data);
1788
1789 status = acpi_install_notify_handler(device->handle,
1790 ACPI_DEVICE_NOTIFY,
1791 acpi_video_device_notify,
1792 data);
1793 if (ACPI_FAILURE(status)) {
1794 printk(KERN_ERR PREFIX
1795 "Error installing notify handler\n");
1796 if(data->brightness)
1797 kfree(data->brightness->levels);
1798 kfree(data->brightness);
1799 kfree(data);
1800 return -ENODEV;
1801 }
1802
1803 mutex_lock(&video->device_list_lock);
1804 list_add_tail(&data->entry, &video->video_device_list);
1805 mutex_unlock(&video->device_list_lock);
1806
1807 acpi_video_device_add_fs(device);
1808
1809 return 0;
1810 }
1811
1812 return -ENOENT;
1813 }
1814
1815 /*
1816 * Arg:
1817 * video : video bus device
1818 *
1819 * Return:
1820 * none
1821 *
1822 * Enumerate the video device list of the video bus,
1823 * bind the ids with the corresponding video devices
1824 * under the video bus.
1825 */
1826
1827 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1828 {
1829 struct acpi_video_device *dev;
1830
1831 mutex_lock(&video->device_list_lock);
1832
1833 list_for_each_entry(dev, &video->video_device_list, entry)
1834 acpi_video_device_bind(video, dev);
1835
1836 mutex_unlock(&video->device_list_lock);
1837 }
1838
1839 /*
1840 * Arg:
1841 * video : video bus device
1842 * device : video output device under the video
1843 * bus
1844 *
1845 * Return:
1846 * none
1847 *
1848 * Bind the ids with the corresponding video devices
1849 * under the video bus.
1850 */
1851
1852 static void
1853 acpi_video_device_bind(struct acpi_video_bus *video,
1854 struct acpi_video_device *device)
1855 {
1856 struct acpi_video_enumerated_device *ids;
1857 int i;
1858
1859 for (i = 0; i < video->attached_count; i++) {
1860 ids = &video->attached_array[i];
1861 if (device->device_id == (ids->value.int_val & 0xffff)) {
1862 ids->bind_info = device;
1863 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1864 }
1865 }
1866 }
1867
1868 /*
1869 * Arg:
1870 * video : video bus device
1871 *
1872 * Return:
1873 * < 0 : error
1874 *
1875 * Call _DOD to enumerate all devices attached to display adapter
1876 *
1877 */
1878
1879 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1880 {
1881 int status;
1882 int count;
1883 int i;
1884 struct acpi_video_enumerated_device *active_list;
1885 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1886 union acpi_object *dod = NULL;
1887 union acpi_object *obj;
1888
1889 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1890 if (!ACPI_SUCCESS(status)) {
1891 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1892 return status;
1893 }
1894
1895 dod = buffer.pointer;
1896 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1897 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1898 status = -EFAULT;
1899 goto out;
1900 }
1901
1902 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1903 dod->package.count));
1904
1905 active_list = kcalloc(1 + dod->package.count,
1906 sizeof(struct acpi_video_enumerated_device),
1907 GFP_KERNEL);
1908 if (!active_list) {
1909 status = -ENOMEM;
1910 goto out;
1911 }
1912
1913 count = 0;
1914 for (i = 0; i < dod->package.count; i++) {
1915 obj = &dod->package.elements[i];
1916
1917 if (obj->type != ACPI_TYPE_INTEGER) {
1918 printk(KERN_ERR PREFIX
1919 "Invalid _DOD data in element %d\n", i);
1920 continue;
1921 }
1922
1923 active_list[count].value.int_val = obj->integer.value;
1924 active_list[count].bind_info = NULL;
1925 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1926 (int)obj->integer.value));
1927 count++;
1928 }
1929
1930 kfree(video->attached_array);
1931
1932 video->attached_array = active_list;
1933 video->attached_count = count;
1934
1935 out:
1936 kfree(buffer.pointer);
1937 return status;
1938 }
1939
1940 static int
1941 acpi_video_get_next_level(struct acpi_video_device *device,
1942 u32 level_current, u32 event)
1943 {
1944 int min, max, min_above, max_below, i, l, delta = 255;
1945 max = max_below = 0;
1946 min = min_above = 255;
1947 /* Find closest level to level_current */
1948 for (i = 2; i < device->brightness->count; i++) {
1949 l = device->brightness->levels[i];
1950 if (abs(l - level_current) < abs(delta)) {
1951 delta = l - level_current;
1952 if (!delta)
1953 break;
1954 }
1955 }
1956 /* Ajust level_current to closest available level */
1957 level_current += delta;
1958 for (i = 2; i < device->brightness->count; i++) {
1959 l = device->brightness->levels[i];
1960 if (l < min)
1961 min = l;
1962 if (l > max)
1963 max = l;
1964 if (l < min_above && l > level_current)
1965 min_above = l;
1966 if (l > max_below && l < level_current)
1967 max_below = l;
1968 }
1969
1970 switch (event) {
1971 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1972 return (level_current < max) ? min_above : min;
1973 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1974 return (level_current < max) ? min_above : max;
1975 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1976 return (level_current > min) ? max_below : min;
1977 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1978 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1979 return 0;
1980 default:
1981 return level_current;
1982 }
1983 }
1984
1985 static int
1986 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1987 {
1988 unsigned long long level_current, level_next;
1989 int result = -EINVAL;
1990
1991 /* no warning message if acpi_backlight=vendor is used */
1992 if (!acpi_video_backlight_support())
1993 return 0;
1994
1995 if (!device->brightness)
1996 goto out;
1997
1998 result = acpi_video_device_lcd_get_level_current(device,
1999 &level_current);
2000 if (result)
2001 goto out;
2002
2003 level_next = acpi_video_get_next_level(device, level_current, event);
2004
2005 result = acpi_video_device_lcd_set_level(device, level_next);
2006
2007 if (!result)
2008 backlight_force_update(device->backlight,
2009 BACKLIGHT_UPDATE_HOTKEY);
2010
2011 out:
2012 if (result)
2013 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
2014
2015 return result;
2016 }
2017
2018 static int
2019 acpi_video_bus_get_devices(struct acpi_video_bus *video,
2020 struct acpi_device *device)
2021 {
2022 int status = 0;
2023 struct acpi_device *dev;
2024
2025 acpi_video_device_enumerate(video);
2026
2027 list_for_each_entry(dev, &device->children, node) {
2028
2029 status = acpi_video_bus_get_one_device(dev, video);
2030 if (ACPI_FAILURE(status)) {
2031 printk(KERN_WARNING PREFIX
2032 "Cant attach device");
2033 continue;
2034 }
2035 }
2036 return status;
2037 }
2038
2039 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
2040 {
2041 acpi_status status;
2042 struct acpi_video_bus *video;
2043
2044
2045 if (!device || !device->video)
2046 return -ENOENT;
2047
2048 video = device->video;
2049
2050 acpi_video_device_remove_fs(device->dev);
2051
2052 status = acpi_remove_notify_handler(device->dev->handle,
2053 ACPI_DEVICE_NOTIFY,
2054 acpi_video_device_notify);
2055 if (device->backlight) {
2056 sysfs_remove_link(&device->backlight->dev.kobj, "device");
2057 backlight_device_unregister(device->backlight);
2058 device->backlight = NULL;
2059 }
2060 if (device->cooling_dev) {
2061 sysfs_remove_link(&device->dev->dev.kobj,
2062 "thermal_cooling");
2063 sysfs_remove_link(&device->cooling_dev->device.kobj,
2064 "device");
2065 thermal_cooling_device_unregister(device->cooling_dev);
2066 device->cooling_dev = NULL;
2067 }
2068 video_output_unregister(device->output_dev);
2069
2070 return 0;
2071 }
2072
2073 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
2074 {
2075 int status;
2076 struct acpi_video_device *dev, *next;
2077
2078 mutex_lock(&video->device_list_lock);
2079
2080 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
2081
2082 status = acpi_video_bus_put_one_device(dev);
2083 if (ACPI_FAILURE(status))
2084 printk(KERN_WARNING PREFIX
2085 "hhuuhhuu bug in acpi video driver.\n");
2086
2087 if (dev->brightness) {
2088 kfree(dev->brightness->levels);
2089 kfree(dev->brightness);
2090 }
2091 list_del(&dev->entry);
2092 kfree(dev);
2093 }
2094
2095 mutex_unlock(&video->device_list_lock);
2096
2097 return 0;
2098 }
2099
2100 /* acpi_video interface */
2101
2102 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
2103 {
2104 return acpi_video_bus_DOS(video, 0, 0);
2105 }
2106
2107 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
2108 {
2109 return acpi_video_bus_DOS(video, 0, 1);
2110 }
2111
2112 static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
2113 {
2114 struct acpi_video_bus *video = acpi_driver_data(device);
2115 struct input_dev *input;
2116 int keycode;
2117
2118 if (!video)
2119 return;
2120
2121 input = video->input;
2122
2123 switch (event) {
2124 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
2125 * most likely via hotkey. */
2126 acpi_bus_generate_proc_event(device, event, 0);
2127 keycode = KEY_SWITCHVIDEOMODE;
2128 break;
2129
2130 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
2131 * connector. */
2132 acpi_video_device_enumerate(video);
2133 acpi_video_device_rebind(video);
2134 acpi_bus_generate_proc_event(device, event, 0);
2135 keycode = KEY_SWITCHVIDEOMODE;
2136 break;
2137
2138 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2139 acpi_bus_generate_proc_event(device, event, 0);
2140 keycode = KEY_SWITCHVIDEOMODE;
2141 break;
2142 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2143 acpi_bus_generate_proc_event(device, event, 0);
2144 keycode = KEY_VIDEO_NEXT;
2145 break;
2146 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2147 acpi_bus_generate_proc_event(device, event, 0);
2148 keycode = KEY_VIDEO_PREV;
2149 break;
2150
2151 default:
2152 keycode = KEY_UNKNOWN;
2153 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2154 "Unsupported event [0x%x]\n", event));
2155 break;
2156 }
2157
2158 acpi_notifier_call_chain(device, event, 0);
2159 input_report_key(input, keycode, 1);
2160 input_sync(input);
2161 input_report_key(input, keycode, 0);
2162 input_sync(input);
2163
2164 return;
2165 }
2166
2167 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2168 {
2169 struct acpi_video_device *video_device = data;
2170 struct acpi_device *device = NULL;
2171 struct acpi_video_bus *bus;
2172 struct input_dev *input;
2173 int keycode;
2174
2175 if (!video_device)
2176 return;
2177
2178 device = video_device->dev;
2179 bus = video_device->video;
2180 input = bus->input;
2181
2182 switch (event) {
2183 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
2184 if (brightness_switch_enabled)
2185 acpi_video_switch_brightness(video_device, event);
2186 acpi_bus_generate_proc_event(device, event, 0);
2187 keycode = KEY_BRIGHTNESS_CYCLE;
2188 break;
2189 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
2190 if (brightness_switch_enabled)
2191 acpi_video_switch_brightness(video_device, event);
2192 acpi_bus_generate_proc_event(device, event, 0);
2193 keycode = KEY_BRIGHTNESSUP;
2194 break;
2195 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2196 if (brightness_switch_enabled)
2197 acpi_video_switch_brightness(video_device, event);
2198 acpi_bus_generate_proc_event(device, event, 0);
2199 keycode = KEY_BRIGHTNESSDOWN;
2200 break;
2201 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2202 if (brightness_switch_enabled)
2203 acpi_video_switch_brightness(video_device, event);
2204 acpi_bus_generate_proc_event(device, event, 0);
2205 keycode = KEY_BRIGHTNESS_ZERO;
2206 break;
2207 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2208 if (brightness_switch_enabled)
2209 acpi_video_switch_brightness(video_device, event);
2210 acpi_bus_generate_proc_event(device, event, 0);
2211 keycode = KEY_DISPLAY_OFF;
2212 break;
2213 default:
2214 keycode = KEY_UNKNOWN;
2215 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2216 "Unsupported event [0x%x]\n", event));
2217 break;
2218 }
2219
2220 acpi_notifier_call_chain(device, event, 0);
2221 input_report_key(input, keycode, 1);
2222 input_sync(input);
2223 input_report_key(input, keycode, 0);
2224 input_sync(input);
2225
2226 return;
2227 }
2228
2229 static int instance;
2230 static int acpi_video_resume(struct acpi_device *device)
2231 {
2232 struct acpi_video_bus *video;
2233 struct acpi_video_device *video_device;
2234 int i;
2235
2236 if (!device || !acpi_driver_data(device))
2237 return -EINVAL;
2238
2239 video = acpi_driver_data(device);
2240
2241 for (i = 0; i < video->attached_count; i++) {
2242 video_device = video->attached_array[i].bind_info;
2243 if (video_device && video_device->backlight)
2244 acpi_video_set_brightness(video_device->backlight);
2245 }
2246 return AE_OK;
2247 }
2248
2249 static acpi_status
2250 acpi_video_bus_match(acpi_handle handle, u32 level, void *context,
2251 void **return_value)
2252 {
2253 struct acpi_device *device = context;
2254 struct acpi_device *sibling;
2255 int result;
2256
2257 if (handle == device->handle)
2258 return AE_CTRL_TERMINATE;
2259
2260 result = acpi_bus_get_device(handle, &sibling);
2261 if (result)
2262 return AE_OK;
2263
2264 if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME))
2265 return AE_ALREADY_EXISTS;
2266
2267 return AE_OK;
2268 }
2269
2270 static int acpi_video_bus_add(struct acpi_device *device)
2271 {
2272 struct acpi_video_bus *video;
2273 struct input_dev *input;
2274 int error;
2275 acpi_status status;
2276
2277 status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
2278 device->parent->handle, 1,
2279 acpi_video_bus_match, NULL,
2280 device, NULL);
2281 if (status == AE_ALREADY_EXISTS) {
2282 printk(KERN_WARNING FW_BUG
2283 "Duplicate ACPI video bus devices for the"
2284 " same VGA controller, please try module "
2285 "parameter \"video.allow_duplicates=1\""
2286 "if the current driver doesn't work.\n");
2287 if (!allow_duplicates)
2288 return -ENODEV;
2289 }
2290
2291 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2292 if (!video)
2293 return -ENOMEM;
2294
2295 /* a hack to fix the duplicate name "VID" problem on T61 */
2296 if (!strcmp(device->pnp.bus_id, "VID")) {
2297 if (instance)
2298 device->pnp.bus_id[3] = '0' + instance;
2299 instance ++;
2300 }
2301 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2302 if (!strcmp(device->pnp.bus_id, "VGA")) {
2303 if (instance)
2304 device->pnp.bus_id[3] = '0' + instance;
2305 instance++;
2306 }
2307
2308 video->device = device;
2309 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2310 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2311 device->driver_data = video;
2312
2313 acpi_video_bus_find_cap(video);
2314 error = acpi_video_bus_check(video);
2315 if (error)
2316 goto err_free_video;
2317
2318 error = acpi_video_bus_add_fs(device);
2319 if (error)
2320 goto err_free_video;
2321
2322 mutex_init(&video->device_list_lock);
2323 INIT_LIST_HEAD(&video->video_device_list);
2324
2325 acpi_video_bus_get_devices(video, device);
2326 acpi_video_bus_start_devices(video);
2327
2328 video->input = input = input_allocate_device();
2329 if (!input) {
2330 error = -ENOMEM;
2331 goto err_stop_video;
2332 }
2333
2334 snprintf(video->phys, sizeof(video->phys),
2335 "%s/video/input0", acpi_device_hid(video->device));
2336
2337 input->name = acpi_device_name(video->device);
2338 input->phys = video->phys;
2339 input->id.bustype = BUS_HOST;
2340 input->id.product = 0x06;
2341 input->dev.parent = &device->dev;
2342 input->evbit[0] = BIT(EV_KEY);
2343 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2344 set_bit(KEY_VIDEO_NEXT, input->keybit);
2345 set_bit(KEY_VIDEO_PREV, input->keybit);
2346 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2347 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2348 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2349 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2350 set_bit(KEY_DISPLAY_OFF, input->keybit);
2351 set_bit(KEY_UNKNOWN, input->keybit);
2352
2353 error = input_register_device(input);
2354 if (error)
2355 goto err_free_input_dev;
2356
2357 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2358 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2359 video->flags.multihead ? "yes" : "no",
2360 video->flags.rom ? "yes" : "no",
2361 video->flags.post ? "yes" : "no");
2362
2363 return 0;
2364
2365 err_free_input_dev:
2366 input_free_device(input);
2367 err_stop_video:
2368 acpi_video_bus_stop_devices(video);
2369 acpi_video_bus_put_devices(video);
2370 kfree(video->attached_array);
2371 acpi_video_bus_remove_fs(device);
2372 err_free_video:
2373 kfree(video);
2374 device->driver_data = NULL;
2375
2376 return error;
2377 }
2378
2379 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2380 {
2381 struct acpi_video_bus *video = NULL;
2382
2383
2384 if (!device || !acpi_driver_data(device))
2385 return -EINVAL;
2386
2387 video = acpi_driver_data(device);
2388
2389 acpi_video_bus_stop_devices(video);
2390 acpi_video_bus_put_devices(video);
2391 acpi_video_bus_remove_fs(device);
2392
2393 input_unregister_device(video->input);
2394 kfree(video->attached_array);
2395 kfree(video);
2396
2397 return 0;
2398 }
2399
2400 static int __init intel_opregion_present(void)
2401 {
2402 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2403 struct pci_dev *dev = NULL;
2404 u32 address;
2405
2406 for_each_pci_dev(dev) {
2407 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2408 continue;
2409 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2410 continue;
2411 pci_read_config_dword(dev, 0xfc, &address);
2412 if (!address)
2413 continue;
2414 return 1;
2415 }
2416 #endif
2417 return 0;
2418 }
2419
2420 int acpi_video_register(void)
2421 {
2422 int result = 0;
2423 if (register_count) {
2424 /*
2425 * if the function of acpi_video_register is already called,
2426 * don't register the acpi_vide_bus again and return no error.
2427 */
2428 return 0;
2429 }
2430
2431 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2432 if (!acpi_video_dir)
2433 return -ENODEV;
2434
2435 result = acpi_bus_register_driver(&acpi_video_bus);
2436 if (result < 0) {
2437 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2438 return -ENODEV;
2439 }
2440
2441 /*
2442 * When the acpi_video_bus is loaded successfully, increase
2443 * the counter reference.
2444 */
2445 register_count = 1;
2446
2447 return 0;
2448 }
2449 EXPORT_SYMBOL(acpi_video_register);
2450
2451 void acpi_video_unregister(void)
2452 {
2453 if (!register_count) {
2454 /*
2455 * If the acpi video bus is already unloaded, don't
2456 * unload it again and return directly.
2457 */
2458 return;
2459 }
2460 acpi_bus_unregister_driver(&acpi_video_bus);
2461
2462 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2463
2464 register_count = 0;
2465
2466 return;
2467 }
2468 EXPORT_SYMBOL(acpi_video_unregister);
2469
2470 /*
2471 * This is kind of nasty. Hardware using Intel chipsets may require
2472 * the video opregion code to be run first in order to initialise
2473 * state before any ACPI video calls are made. To handle this we defer
2474 * registration of the video class until the opregion code has run.
2475 */
2476
2477 static int __init acpi_video_init(void)
2478 {
2479 dmi_check_system(video_dmi_table);
2480
2481 if (intel_opregion_present())
2482 return 0;
2483
2484 return acpi_video_register();
2485 }
2486
2487 static void __exit acpi_video_exit(void)
2488 {
2489 acpi_video_unregister();
2490
2491 return;
2492 }
2493
2494 module_init(acpi_video_init);
2495 module_exit(acpi_video_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree