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Show the physical device node of backlight class device.
[linux-2.6/linux-2.6-openrd.git] / drivers / acpi / video.c
blob9de143af3625908f6d43e471b255c76d56af1cd5
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <linux/sort.h>
40 #include <linux/pci.h>
41 #include <linux/pci_ids.h>
42 #include <asm/uaccess.h>
43
44 #include <acpi/acpi_bus.h>
45 #include <acpi/acpi_drivers.h>
46
47 #define ACPI_VIDEO_CLASS "video"
48 #define ACPI_VIDEO_BUS_NAME "Video Bus"
49 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
50 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
51 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
52 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
53 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
54 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
55
56 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
57 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
58 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
59 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
60 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
61
62 #define MAX_NAME_LEN 20
63
64 #define ACPI_VIDEO_DISPLAY_CRT 1
65 #define ACPI_VIDEO_DISPLAY_TV 2
66 #define ACPI_VIDEO_DISPLAY_DVI 3
67 #define ACPI_VIDEO_DISPLAY_LCD 4
68
69 #define _COMPONENT ACPI_VIDEO_COMPONENT
70 ACPI_MODULE_NAME("video");
71
72 MODULE_AUTHOR("Bruno Ducrot");
73 MODULE_DESCRIPTION("ACPI Video Driver");
74 MODULE_LICENSE("GPL");
75
76 static int brightness_switch_enabled = 1;
77 module_param(brightness_switch_enabled, bool, 0644);
78
79 static int acpi_video_bus_add(struct acpi_device *device);
80 static int acpi_video_bus_remove(struct acpi_device *device, int type);
81 static int acpi_video_resume(struct acpi_device *device);
82 static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
83
84 static const struct acpi_device_id video_device_ids[] = {
85 {ACPI_VIDEO_HID, 0},
86 {"", 0},
87 };
88 MODULE_DEVICE_TABLE(acpi, video_device_ids);
89
90 static struct acpi_driver acpi_video_bus = {
91 .name = "video",
92 .class = ACPI_VIDEO_CLASS,
93 .ids = video_device_ids,
94 .ops = {
95 .add = acpi_video_bus_add,
96 .remove = acpi_video_bus_remove,
97 .resume = acpi_video_resume,
98 .notify = acpi_video_bus_notify,
99 },
100 };
101
102 struct acpi_video_bus_flags {
103 u8 multihead:1; /* can switch video heads */
104 u8 rom:1; /* can retrieve a video rom */
105 u8 post:1; /* can configure the head to */
106 u8 reserved:5;
107 };
108
109 struct acpi_video_bus_cap {
110 u8 _DOS:1; /*Enable/Disable output switching */
111 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
112 u8 _ROM:1; /*Get ROM Data */
113 u8 _GPD:1; /*Get POST Device */
114 u8 _SPD:1; /*Set POST Device */
115 u8 _VPO:1; /*Video POST Options */
116 u8 reserved:2;
117 };
118
119 struct acpi_video_device_attrib {
120 u32 display_index:4; /* A zero-based instance of the Display */
121 u32 display_port_attachment:4; /*This field differentiates the display type */
122 u32 display_type:4; /*Describe the specific type in use */
123 u32 vendor_specific:4; /*Chipset Vendor Specific */
124 u32 bios_can_detect:1; /*BIOS can detect the device */
125 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
126 the VGA device. */
127 u32 pipe_id:3; /*For VGA multiple-head devices. */
128 u32 reserved:10; /*Must be 0 */
129 u32 device_id_scheme:1; /*Device ID Scheme */
130 };
131
132 struct acpi_video_enumerated_device {
133 union {
134 u32 int_val;
135 struct acpi_video_device_attrib attrib;
136 } value;
137 struct acpi_video_device *bind_info;
138 };
139
140 struct acpi_video_bus {
141 struct acpi_device *device;
142 u8 dos_setting;
143 struct acpi_video_enumerated_device *attached_array;
144 u8 attached_count;
145 struct acpi_video_bus_cap cap;
146 struct acpi_video_bus_flags flags;
147 struct list_head video_device_list;
148 struct mutex device_list_lock; /* protects video_device_list */
149 struct proc_dir_entry *dir;
150 struct input_dev *input;
151 char phys[32]; /* for input device */
152 };
153
154 struct acpi_video_device_flags {
155 u8 crt:1;
156 u8 lcd:1;
157 u8 tvout:1;
158 u8 dvi:1;
159 u8 bios:1;
160 u8 unknown:1;
161 u8 reserved:2;
162 };
163
164 struct acpi_video_device_cap {
165 u8 _ADR:1; /*Return the unique ID */
166 u8 _BCL:1; /*Query list of brightness control levels supported */
167 u8 _BCM:1; /*Set the brightness level */
168 u8 _BQC:1; /* Get current brightness level */
169 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
170 u8 _DDC:1; /*Return the EDID for this device */
171 u8 _DCS:1; /*Return status of output device */
172 u8 _DGS:1; /*Query graphics state */
173 u8 _DSS:1; /*Device state set */
174 };
175
176 struct acpi_video_brightness_flags {
177 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
178 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
179 u8 _BCL_use_index:1; /* levels in _BCL are index values */
180 u8 _BCM_use_index:1; /* input of _BCM is an index value */
181 u8 _BQC_use_index:1; /* _BQC returns an index value */
182 };
183
184 struct acpi_video_device_brightness {
185 int curr;
186 int count;
187 int *levels;
188 struct acpi_video_brightness_flags flags;
189 };
190
191 struct acpi_video_device {
192 unsigned long device_id;
193 struct acpi_video_device_flags flags;
194 struct acpi_video_device_cap cap;
195 struct list_head entry;
196 struct acpi_video_bus *video;
197 struct acpi_device *dev;
198 struct acpi_video_device_brightness *brightness;
199 struct backlight_device *backlight;
200 struct thermal_cooling_device *cdev;
201 struct output_device *output_dev;
202 };
203
204 /* bus */
205 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
206 static const struct file_operations acpi_video_bus_info_fops = {
207 .owner = THIS_MODULE,
208 .open = acpi_video_bus_info_open_fs,
209 .read = seq_read,
210 .llseek = seq_lseek,
211 .release = single_release,
212 };
213
214 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
215 static const struct file_operations acpi_video_bus_ROM_fops = {
216 .owner = THIS_MODULE,
217 .open = acpi_video_bus_ROM_open_fs,
218 .read = seq_read,
219 .llseek = seq_lseek,
220 .release = single_release,
221 };
222
223 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
224 struct file *file);
225 static const struct file_operations acpi_video_bus_POST_info_fops = {
226 .owner = THIS_MODULE,
227 .open = acpi_video_bus_POST_info_open_fs,
228 .read = seq_read,
229 .llseek = seq_lseek,
230 .release = single_release,
231 };
232
233 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
234 static ssize_t acpi_video_bus_write_POST(struct file *file,
235 const char __user *buffer, size_t count, loff_t *data);
236 static const struct file_operations acpi_video_bus_POST_fops = {
237 .owner = THIS_MODULE,
238 .open = acpi_video_bus_POST_open_fs,
239 .read = seq_read,
240 .write = acpi_video_bus_write_POST,
241 .llseek = seq_lseek,
242 .release = single_release,
243 };
244
245 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
246 static ssize_t acpi_video_bus_write_DOS(struct file *file,
247 const char __user *buffer, size_t count, loff_t *data);
248 static const struct file_operations acpi_video_bus_DOS_fops = {
249 .owner = THIS_MODULE,
250 .open = acpi_video_bus_DOS_open_fs,
251 .read = seq_read,
252 .write = acpi_video_bus_write_DOS,
253 .llseek = seq_lseek,
254 .release = single_release,
255 };
256
257 /* device */
258 static int acpi_video_device_info_open_fs(struct inode *inode,
259 struct file *file);
260 static const struct file_operations acpi_video_device_info_fops = {
261 .owner = THIS_MODULE,
262 .open = acpi_video_device_info_open_fs,
263 .read = seq_read,
264 .llseek = seq_lseek,
265 .release = single_release,
266 };
267
268 static int acpi_video_device_state_open_fs(struct inode *inode,
269 struct file *file);
270 static ssize_t acpi_video_device_write_state(struct file *file,
271 const char __user *buffer, size_t count, loff_t *data);
272 static const struct file_operations acpi_video_device_state_fops = {
273 .owner = THIS_MODULE,
274 .open = acpi_video_device_state_open_fs,
275 .read = seq_read,
276 .write = acpi_video_device_write_state,
277 .llseek = seq_lseek,
278 .release = single_release,
279 };
280
281 static int acpi_video_device_brightness_open_fs(struct inode *inode,
282 struct file *file);
283 static ssize_t acpi_video_device_write_brightness(struct file *file,
284 const char __user *buffer, size_t count, loff_t *data);
285 static struct file_operations acpi_video_device_brightness_fops = {
286 .owner = THIS_MODULE,
287 .open = acpi_video_device_brightness_open_fs,
288 .read = seq_read,
289 .write = acpi_video_device_write_brightness,
290 .llseek = seq_lseek,
291 .release = single_release,
292 };
293
294 static int acpi_video_device_EDID_open_fs(struct inode *inode,
295 struct file *file);
296 static const struct file_operations acpi_video_device_EDID_fops = {
297 .owner = THIS_MODULE,
298 .open = acpi_video_device_EDID_open_fs,
299 .read = seq_read,
300 .llseek = seq_lseek,
301 .release = single_release,
302 };
303
304 static const char device_decode[][30] = {
305 "motherboard VGA device",
306 "PCI VGA device",
307 "AGP VGA device",
308 "UNKNOWN",
309 };
310
311 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
312 static void acpi_video_device_rebind(struct acpi_video_bus *video);
313 static void acpi_video_device_bind(struct acpi_video_bus *video,
314 struct acpi_video_device *device);
315 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
316 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
317 int level);
318 static int acpi_video_device_lcd_get_level_current(
319 struct acpi_video_device *device,
320 unsigned long long *level);
321 static int acpi_video_get_next_level(struct acpi_video_device *device,
322 u32 level_current, u32 event);
323 static int acpi_video_switch_brightness(struct acpi_video_device *device,
324 int event);
325 static int acpi_video_device_get_state(struct acpi_video_device *device,
326 unsigned long long *state);
327 static int acpi_video_output_get(struct output_device *od);
328 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
329
330 /*backlight device sysfs support*/
331 static int acpi_video_get_brightness(struct backlight_device *bd)
332 {
333 unsigned long long cur_level;
334 int i;
335 struct acpi_video_device *vd =
336 (struct acpi_video_device *)bl_get_data(bd);
337
338 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
339 return -EINVAL;
340 for (i = 2; i < vd->brightness->count; i++) {
341 if (vd->brightness->levels[i] == cur_level)
342 /* The first two entries are special - see page 575
343 of the ACPI spec 3.0 */
344 return i-2;
345 }
346 return 0;
347 }
348
349 static int acpi_video_set_brightness(struct backlight_device *bd)
350 {
351 int request_level = bd->props.brightness + 2;
352 struct acpi_video_device *vd =
353 (struct acpi_video_device *)bl_get_data(bd);
354
355 return acpi_video_device_lcd_set_level(vd,
356 vd->brightness->levels[request_level]);
357 }
358
359 static struct backlight_ops acpi_backlight_ops = {
360 .get_brightness = acpi_video_get_brightness,
361 .update_status = acpi_video_set_brightness,
362 };
363
364 /*video output device sysfs support*/
365 static int acpi_video_output_get(struct output_device *od)
366 {
367 unsigned long long state;
368 struct acpi_video_device *vd =
369 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
370 acpi_video_device_get_state(vd, &state);
371 return (int)state;
372 }
373
374 static int acpi_video_output_set(struct output_device *od)
375 {
376 unsigned long state = od->request_state;
377 struct acpi_video_device *vd=
378 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
379 return acpi_video_device_set_state(vd, state);
380 }
381
382 static struct output_properties acpi_output_properties = {
383 .set_state = acpi_video_output_set,
384 .get_status = acpi_video_output_get,
385 };
386
387
388 /* thermal cooling device callbacks */
389 static int video_get_max_state(struct thermal_cooling_device *cdev, unsigned
390 long *state)
391 {
392 struct acpi_device *device = cdev->devdata;
393 struct acpi_video_device *video = acpi_driver_data(device);
394
395 *state = video->brightness->count - 3;
396 return 0;
397 }
398
399 static int video_get_cur_state(struct thermal_cooling_device *cdev, unsigned
400 long *state)
401 {
402 struct acpi_device *device = cdev->devdata;
403 struct acpi_video_device *video = acpi_driver_data(device);
404 unsigned long long level;
405 int offset;
406
407 if (acpi_video_device_lcd_get_level_current(video, &level))
408 return -EINVAL;
409 for (offset = 2; offset < video->brightness->count; offset++)
410 if (level == video->brightness->levels[offset]) {
411 *state = video->brightness->count - offset - 1;
412 return 0;
413 }
414
415 return -EINVAL;
416 }
417
418 static int
419 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
420 {
421 struct acpi_device *device = cdev->devdata;
422 struct acpi_video_device *video = acpi_driver_data(device);
423 int level;
424
425 if ( state >= video->brightness->count - 2)
426 return -EINVAL;
427
428 state = video->brightness->count - state;
429 level = video->brightness->levels[state -1];
430 return acpi_video_device_lcd_set_level(video, level);
431 }
432
433 static struct thermal_cooling_device_ops video_cooling_ops = {
434 .get_max_state = video_get_max_state,
435 .get_cur_state = video_get_cur_state,
436 .set_cur_state = video_set_cur_state,
437 };
438
439 /* --------------------------------------------------------------------------
440 Video Management
441 -------------------------------------------------------------------------- */
442
443 /* device */
444
445 static int
446 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
447 {
448 int status;
449
450 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
451
452 return status;
453 }
454
455 static int
456 acpi_video_device_get_state(struct acpi_video_device *device,
457 unsigned long long *state)
458 {
459 int status;
460
461 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
462
463 return status;
464 }
465
466 static int
467 acpi_video_device_set_state(struct acpi_video_device *device, int state)
468 {
469 int status;
470 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
471 struct acpi_object_list args = { 1, &arg0 };
472 unsigned long long ret;
473
474
475 arg0.integer.value = state;
476 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
477
478 return status;
479 }
480
481 static int
482 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
483 union acpi_object **levels)
484 {
485 int status;
486 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
487 union acpi_object *obj;
488
489
490 *levels = NULL;
491
492 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
493 if (!ACPI_SUCCESS(status))
494 return status;
495 obj = (union acpi_object *)buffer.pointer;
496 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
497 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
498 status = -EFAULT;
499 goto err;
500 }
501
502 *levels = obj;
503
504 return 0;
505
506 err:
507 kfree(buffer.pointer);
508
509 return status;
510 }
511
512 static int
513 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
514 {
515 int status;
516 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
517 struct acpi_object_list args = { 1, &arg0 };
518 int state;
519
520 arg0.integer.value = level;
521
522 status = acpi_evaluate_object(device->dev->handle, "_BCM",
523 &args, NULL);
524 if (ACPI_FAILURE(status)) {
525 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
526 return -EIO;
527 }
528
529 device->brightness->curr = level;
530 for (state = 2; state < device->brightness->count; state++)
531 if (level == device->brightness->levels[state]) {
532 if (device->backlight)
533 device->backlight->props.brightness = state - 2;
534 return 0;
535 }
536
537 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
538 return -EINVAL;
539 }
540
541 /*
542 * For some buggy _BQC methods, we need to add a constant value to
543 * the _BQC return value to get the actual current brightness level
544 */
545
546 static int bqc_offset_aml_bug_workaround;
547 static int __init video_set_bqc_offset(const struct dmi_system_id *d)
548 {
549 bqc_offset_aml_bug_workaround = 9;
550 return 0;
551 }
552
553 static struct dmi_system_id video_dmi_table[] __initdata = {
554 /*
555 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
556 */
557 {
558 .callback = video_set_bqc_offset,
559 .ident = "Acer Aspire 5720",
560 .matches = {
561 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
562 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
563 },
564 },
565 {
566 .callback = video_set_bqc_offset,
567 .ident = "Acer Aspire 5710Z",
568 .matches = {
569 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
570 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
571 },
572 },
573 {
574 .callback = video_set_bqc_offset,
575 .ident = "eMachines E510",
576 .matches = {
577 DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
578 DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
579 },
580 },
581 {
582 .callback = video_set_bqc_offset,
583 .ident = "Acer Aspire 5315",
584 .matches = {
585 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
586 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
587 },
588 },
589 {}
590 };
591
592 static int
593 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
594 unsigned long long *level)
595 {
596 acpi_status status = AE_OK;
597
598 if (device->cap._BQC || device->cap._BCQ) {
599 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
600
601 status = acpi_evaluate_integer(device->dev->handle, buf,
602 NULL, level);
603 if (ACPI_SUCCESS(status)) {
604 if (device->brightness->flags._BQC_use_index) {
605 if (device->brightness->flags._BCL_reversed)
606 *level = device->brightness->count
607 - 3 - (*level);
608 *level = device->brightness->levels[*level + 2];
609
610 }
611 *level += bqc_offset_aml_bug_workaround;
612 device->brightness->curr = *level;
613 return 0;
614 } else {
615 /* Fixme:
616 * should we return an error or ignore this failure?
617 * dev->brightness->curr is a cached value which stores
618 * the correct current backlight level in most cases.
619 * ACPI video backlight still works w/ buggy _BQC.
620 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
621 */
622 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
623 device->cap._BQC = device->cap._BCQ = 0;
624 }
625 }
626
627 *level = device->brightness->curr;
628 return 0;
629 }
630
631 static int
632 acpi_video_device_EDID(struct acpi_video_device *device,
633 union acpi_object **edid, ssize_t length)
634 {
635 int status;
636 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
637 union acpi_object *obj;
638 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
639 struct acpi_object_list args = { 1, &arg0 };
640
641
642 *edid = NULL;
643
644 if (!device)
645 return -ENODEV;
646 if (length == 128)
647 arg0.integer.value = 1;
648 else if (length == 256)
649 arg0.integer.value = 2;
650 else
651 return -EINVAL;
652
653 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
654 if (ACPI_FAILURE(status))
655 return -ENODEV;
656
657 obj = buffer.pointer;
658
659 if (obj && obj->type == ACPI_TYPE_BUFFER)
660 *edid = obj;
661 else {
662 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
663 status = -EFAULT;
664 kfree(obj);
665 }
666
667 return status;
668 }
669
670 /* bus */
671
672 static int
673 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
674 {
675 int status;
676 unsigned long long tmp;
677 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
678 struct acpi_object_list args = { 1, &arg0 };
679
680
681 arg0.integer.value = option;
682
683 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
684 if (ACPI_SUCCESS(status))
685 status = tmp ? (-EINVAL) : (AE_OK);
686
687 return status;
688 }
689
690 static int
691 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
692 {
693 int status;
694
695 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
696
697 return status;
698 }
699
700 static int
701 acpi_video_bus_POST_options(struct acpi_video_bus *video,
702 unsigned long long *options)
703 {
704 int status;
705
706 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
707 *options &= 3;
708
709 return status;
710 }
711
712 /*
713 * Arg:
714 * video : video bus device pointer
715 * bios_flag :
716 * 0. The system BIOS should NOT automatically switch(toggle)
717 * the active display output.
718 * 1. The system BIOS should automatically switch (toggle) the
719 * active display output. No switch event.
720 * 2. The _DGS value should be locked.
721 * 3. The system BIOS should not automatically switch (toggle) the
722 * active display output, but instead generate the display switch
723 * event notify code.
724 * lcd_flag :
725 * 0. The system BIOS should automatically control the brightness level
726 * of the LCD when the power changes from AC to DC
727 * 1. The system BIOS should NOT automatically control the brightness
728 * level of the LCD when the power changes from AC to DC.
729 * Return Value:
730 * -1 wrong arg.
731 */
732
733 static int
734 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
735 {
736 acpi_integer status = 0;
737 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
738 struct acpi_object_list args = { 1, &arg0 };
739
740
741 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
742 status = -1;
743 goto Failed;
744 }
745 arg0.integer.value = (lcd_flag << 2) | bios_flag;
746 video->dos_setting = arg0.integer.value;
747 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
748
749 Failed:
750 return status;
751 }
752
753 /*
754 * Simple comparison function used to sort backlight levels.
755 */
756
757 static int
758 acpi_video_cmp_level(const void *a, const void *b)
759 {
760 return *(int *)a - *(int *)b;
761 }
762
763 /*
764 * Arg:
765 * device : video output device (LCD, CRT, ..)
766 *
767 * Return Value:
768 * Maximum brightness level
769 *
770 * Allocate and initialize device->brightness.
771 */
772
773 static int
774 acpi_video_init_brightness(struct acpi_video_device *device)
775 {
776 union acpi_object *obj = NULL;
777 int i, max_level = 0, count = 0, level_ac_battery = 0;
778 unsigned long long level, level_old;
779 union acpi_object *o;
780 struct acpi_video_device_brightness *br = NULL;
781 int result = -EINVAL;
782
783 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
784 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
785 "LCD brightness level\n"));
786 goto out;
787 }
788
789 if (obj->package.count < 2)
790 goto out;
791
792 br = kzalloc(sizeof(*br), GFP_KERNEL);
793 if (!br) {
794 printk(KERN_ERR "can't allocate memory\n");
795 result = -ENOMEM;
796 goto out;
797 }
798
799 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
800 GFP_KERNEL);
801 if (!br->levels) {
802 result = -ENOMEM;
803 goto out_free;
804 }
805
806 for (i = 0; i < obj->package.count; i++) {
807 o = (union acpi_object *)&obj->package.elements[i];
808 if (o->type != ACPI_TYPE_INTEGER) {
809 printk(KERN_ERR PREFIX "Invalid data\n");
810 continue;
811 }
812 br->levels[count] = (u32) o->integer.value;
813
814 if (br->levels[count] > max_level)
815 max_level = br->levels[count];
816 count++;
817 }
818
819 /*
820 * some buggy BIOS don't export the levels
821 * when machine is on AC/Battery in _BCL package.
822 * In this case, the first two elements in _BCL packages
823 * are also supported brightness levels that OS should take care of.
824 */
825 for (i = 2; i < count; i++) {
826 if (br->levels[i] == br->levels[0])
827 level_ac_battery++;
828 if (br->levels[i] == br->levels[1])
829 level_ac_battery++;
830 }
831
832 if (level_ac_battery < 2) {
833 level_ac_battery = 2 - level_ac_battery;
834 br->flags._BCL_no_ac_battery_levels = 1;
835 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
836 br->levels[i] = br->levels[i - level_ac_battery];
837 count += level_ac_battery;
838 } else if (level_ac_battery > 2)
839 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
840
841 /* Check if the _BCL package is in a reversed order */
842 if (max_level == br->levels[2]) {
843 br->flags._BCL_reversed = 1;
844 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
845 acpi_video_cmp_level, NULL);
846 } else if (max_level != br->levels[count - 1])
847 ACPI_ERROR((AE_INFO,
848 "Found unordered _BCL package\n"));
849
850 br->count = count;
851 device->brightness = br;
852
853 /* Check the input/output of _BQC/_BCL/_BCM */
854 if ((max_level < 100) && (max_level <= (count - 2)))
855 br->flags._BCL_use_index = 1;
856
857 /*
858 * _BCM is always consistent with _BCL,
859 * at least for all the laptops we have ever seen.
860 */
861 br->flags._BCM_use_index = br->flags._BCL_use_index;
862
863 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
864 br->curr = level_old = max_level;
865
866 if (!device->cap._BQC)
867 goto set_level;
868
869 result = acpi_video_device_lcd_get_level_current(device, &level_old);
870 if (result)
871 goto out_free_levels;
872
873 /*
874 * Set the level to maximum and check if _BQC uses indexed value
875 */
876 result = acpi_video_device_lcd_set_level(device, max_level);
877 if (result)
878 goto out_free_levels;
879
880 result = acpi_video_device_lcd_get_level_current(device, &level);
881 if (result)
882 goto out_free_levels;
883
884 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
885
886 if (!br->flags._BQC_use_index)
887 goto set_level;
888
889 if (br->flags._BCL_reversed)
890 level_old = (br->count - 1) - level_old;
891 level_old = br->levels[level_old];
892
893 set_level:
894 result = acpi_video_device_lcd_set_level(device, level_old);
895 if (result)
896 goto out_free_levels;
897
898 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
899 "found %d brightness levels\n", count - 2));
900 kfree(obj);
901 return result;
902
903 out_free_levels:
904 kfree(br->levels);
905 out_free:
906 kfree(br);
907 out:
908 device->brightness = NULL;
909 kfree(obj);
910 return result;
911 }
912
913 /*
914 * Arg:
915 * device : video output device (LCD, CRT, ..)
916 *
917 * Return Value:
918 * None
919 *
920 * Find out all required AML methods defined under the output
921 * device.
922 */
923
924 static void acpi_video_device_find_cap(struct acpi_video_device *device)
925 {
926 acpi_handle h_dummy1;
927
928
929 memset(&device->cap, 0, sizeof(device->cap));
930
931 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
932 device->cap._ADR = 1;
933 }
934 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
935 device->cap._BCL = 1;
936 }
937 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
938 device->cap._BCM = 1;
939 }
940 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
941 device->cap._BQC = 1;
942 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
943 &h_dummy1))) {
944 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
945 device->cap._BCQ = 1;
946 }
947
948 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
949 device->cap._DDC = 1;
950 }
951 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
952 device->cap._DCS = 1;
953 }
954 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
955 device->cap._DGS = 1;
956 }
957 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
958 device->cap._DSS = 1;
959 }
960
961 if (acpi_video_backlight_support()) {
962 int result;
963 static int count = 0;
964 char *name;
965
966 result = acpi_video_init_brightness(device);
967 if (result)
968 return;
969 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
970 if (!name)
971 return;
972
973 sprintf(name, "acpi_video%d", count++);
974 device->backlight = backlight_device_register(name,
975 NULL, device, &acpi_backlight_ops);
976 device->backlight->props.max_brightness = device->brightness->count-3;
977 kfree(name);
978
979 result = sysfs_create_link(&device->backlight->dev.kobj,
980 &device->dev->dev.kobj, "device");
981 if (result)
982 printk(KERN_ERR PREFIX "Create sysfs link\n");
983
984 device->cdev = thermal_cooling_device_register("LCD",
985 device->dev, &video_cooling_ops);
986 if (IS_ERR(device->cdev))
987 return;
988
989 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
990 device->cdev->id);
991 result = sysfs_create_link(&device->dev->dev.kobj,
992 &device->cdev->device.kobj,
993 "thermal_cooling");
994 if (result)
995 printk(KERN_ERR PREFIX "Create sysfs link\n");
996 result = sysfs_create_link(&device->cdev->device.kobj,
997 &device->dev->dev.kobj, "device");
998 if (result)
999 printk(KERN_ERR PREFIX "Create sysfs link\n");
1000
1001 }
1002
1003 if (acpi_video_display_switch_support()) {
1004
1005 if (device->cap._DCS && device->cap._DSS) {
1006 static int count;
1007 char *name;
1008 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
1009 if (!name)
1010 return;
1011 sprintf(name, "acpi_video%d", count++);
1012 device->output_dev = video_output_register(name,
1013 NULL, device, &acpi_output_properties);
1014 kfree(name);
1015 }
1016 }
1017 }
1018
1019 /*
1020 * Arg:
1021 * device : video output device (VGA)
1022 *
1023 * Return Value:
1024 * None
1025 *
1026 * Find out all required AML methods defined under the video bus device.
1027 */
1028
1029 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
1030 {
1031 acpi_handle h_dummy1;
1032
1033 memset(&video->cap, 0, sizeof(video->cap));
1034 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
1035 video->cap._DOS = 1;
1036 }
1037 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
1038 video->cap._DOD = 1;
1039 }
1040 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
1041 video->cap._ROM = 1;
1042 }
1043 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
1044 video->cap._GPD = 1;
1045 }
1046 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
1047 video->cap._SPD = 1;
1048 }
1049 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
1050 video->cap._VPO = 1;
1051 }
1052 }
1053
1054 /*
1055 * Check whether the video bus device has required AML method to
1056 * support the desired features
1057 */
1058
1059 static int acpi_video_bus_check(struct acpi_video_bus *video)
1060 {
1061 acpi_status status = -ENOENT;
1062 struct device *dev;
1063
1064 if (!video)
1065 return -EINVAL;
1066
1067 dev = acpi_get_physical_pci_device(video->device->handle);
1068 if (!dev)
1069 return -ENODEV;
1070 put_device(dev);
1071
1072 /* Since there is no HID, CID and so on for VGA driver, we have
1073 * to check well known required nodes.
1074 */
1075
1076 /* Does this device support video switching? */
1077 if (video->cap._DOS) {
1078 video->flags.multihead = 1;
1079 status = 0;
1080 }
1081
1082 /* Does this device support retrieving a video ROM? */
1083 if (video->cap._ROM) {
1084 video->flags.rom = 1;
1085 status = 0;
1086 }
1087
1088 /* Does this device support configuring which video device to POST? */
1089 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1090 video->flags.post = 1;
1091 status = 0;
1092 }
1093
1094 return status;
1095 }
1096
1097 /* --------------------------------------------------------------------------
1098 FS Interface (/proc)
1099 -------------------------------------------------------------------------- */
1100
1101 static struct proc_dir_entry *acpi_video_dir;
1102
1103 /* video devices */
1104
1105 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1106 {
1107 struct acpi_video_device *dev = seq->private;
1108
1109
1110 if (!dev)
1111 goto end;
1112
1113 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1114 seq_printf(seq, "type: ");
1115 if (dev->flags.crt)
1116 seq_printf(seq, "CRT\n");
1117 else if (dev->flags.lcd)
1118 seq_printf(seq, "LCD\n");
1119 else if (dev->flags.tvout)
1120 seq_printf(seq, "TVOUT\n");
1121 else if (dev->flags.dvi)
1122 seq_printf(seq, "DVI\n");
1123 else
1124 seq_printf(seq, "UNKNOWN\n");
1125
1126 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1127
1128 end:
1129 return 0;
1130 }
1131
1132 static int
1133 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1134 {
1135 return single_open(file, acpi_video_device_info_seq_show,
1136 PDE(inode)->data);
1137 }
1138
1139 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1140 {
1141 int status;
1142 struct acpi_video_device *dev = seq->private;
1143 unsigned long long state;
1144
1145
1146 if (!dev)
1147 goto end;
1148
1149 status = acpi_video_device_get_state(dev, &state);
1150 seq_printf(seq, "state: ");
1151 if (ACPI_SUCCESS(status))
1152 seq_printf(seq, "0x%02llx\n", state);
1153 else
1154 seq_printf(seq, "<not supported>\n");
1155
1156 status = acpi_video_device_query(dev, &state);
1157 seq_printf(seq, "query: ");
1158 if (ACPI_SUCCESS(status))
1159 seq_printf(seq, "0x%02llx\n", state);
1160 else
1161 seq_printf(seq, "<not supported>\n");
1162
1163 end:
1164 return 0;
1165 }
1166
1167 static int
1168 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1169 {
1170 return single_open(file, acpi_video_device_state_seq_show,
1171 PDE(inode)->data);
1172 }
1173
1174 static ssize_t
1175 acpi_video_device_write_state(struct file *file,
1176 const char __user * buffer,
1177 size_t count, loff_t * data)
1178 {
1179 int status;
1180 struct seq_file *m = file->private_data;
1181 struct acpi_video_device *dev = m->private;
1182 char str[12] = { 0 };
1183 u32 state = 0;
1184
1185
1186 if (!dev || count + 1 > sizeof str)
1187 return -EINVAL;
1188
1189 if (copy_from_user(str, buffer, count))
1190 return -EFAULT;
1191
1192 str[count] = 0;
1193 state = simple_strtoul(str, NULL, 0);
1194 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1195
1196 status = acpi_video_device_set_state(dev, state);
1197
1198 if (status)
1199 return -EFAULT;
1200
1201 return count;
1202 }
1203
1204 static int
1205 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1206 {
1207 struct acpi_video_device *dev = seq->private;
1208 int i;
1209
1210
1211 if (!dev || !dev->brightness) {
1212 seq_printf(seq, "<not supported>\n");
1213 return 0;
1214 }
1215
1216 seq_printf(seq, "levels: ");
1217 for (i = 2; i < dev->brightness->count; i++)
1218 seq_printf(seq, " %d", dev->brightness->levels[i]);
1219 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1220
1221 return 0;
1222 }
1223
1224 static int
1225 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1226 {
1227 return single_open(file, acpi_video_device_brightness_seq_show,
1228 PDE(inode)->data);
1229 }
1230
1231 static ssize_t
1232 acpi_video_device_write_brightness(struct file *file,
1233 const char __user * buffer,
1234 size_t count, loff_t * data)
1235 {
1236 struct seq_file *m = file->private_data;
1237 struct acpi_video_device *dev = m->private;
1238 char str[5] = { 0 };
1239 unsigned int level = 0;
1240 int i;
1241
1242
1243 if (!dev || !dev->brightness || count + 1 > sizeof str)
1244 return -EINVAL;
1245
1246 if (copy_from_user(str, buffer, count))
1247 return -EFAULT;
1248
1249 str[count] = 0;
1250 level = simple_strtoul(str, NULL, 0);
1251
1252 if (level > 100)
1253 return -EFAULT;
1254
1255 /* validate through the list of available levels */
1256 for (i = 2; i < dev->brightness->count; i++)
1257 if (level == dev->brightness->levels[i]) {
1258 if (!acpi_video_device_lcd_set_level(dev, level))
1259 return count;
1260 break;
1261 }
1262
1263 return -EINVAL;
1264 }
1265
1266 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1267 {
1268 struct acpi_video_device *dev = seq->private;
1269 int status;
1270 int i;
1271 union acpi_object *edid = NULL;
1272
1273
1274 if (!dev)
1275 goto out;
1276
1277 status = acpi_video_device_EDID(dev, &edid, 128);
1278 if (ACPI_FAILURE(status)) {
1279 status = acpi_video_device_EDID(dev, &edid, 256);
1280 }
1281
1282 if (ACPI_FAILURE(status)) {
1283 goto out;
1284 }
1285
1286 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1287 for (i = 0; i < edid->buffer.length; i++)
1288 seq_putc(seq, edid->buffer.pointer[i]);
1289 }
1290
1291 out:
1292 if (!edid)
1293 seq_printf(seq, "<not supported>\n");
1294 else
1295 kfree(edid);
1296
1297 return 0;
1298 }
1299
1300 static int
1301 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1302 {
1303 return single_open(file, acpi_video_device_EDID_seq_show,
1304 PDE(inode)->data);
1305 }
1306
1307 static int acpi_video_device_add_fs(struct acpi_device *device)
1308 {
1309 struct proc_dir_entry *entry, *device_dir;
1310 struct acpi_video_device *vid_dev;
1311
1312 vid_dev = acpi_driver_data(device);
1313 if (!vid_dev)
1314 return -ENODEV;
1315
1316 device_dir = proc_mkdir(acpi_device_bid(device),
1317 vid_dev->video->dir);
1318 if (!device_dir)
1319 return -ENOMEM;
1320
1321 /* 'info' [R] */
1322 entry = proc_create_data("info", S_IRUGO, device_dir,
1323 &acpi_video_device_info_fops, acpi_driver_data(device));
1324 if (!entry)
1325 goto err_remove_dir;
1326
1327 /* 'state' [R/W] */
1328 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1329 device_dir,
1330 &acpi_video_device_state_fops,
1331 acpi_driver_data(device));
1332 if (!entry)
1333 goto err_remove_info;
1334
1335 /* 'brightness' [R/W] */
1336 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1337 device_dir,
1338 &acpi_video_device_brightness_fops,
1339 acpi_driver_data(device));
1340 if (!entry)
1341 goto err_remove_state;
1342
1343 /* 'EDID' [R] */
1344 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1345 &acpi_video_device_EDID_fops,
1346 acpi_driver_data(device));
1347 if (!entry)
1348 goto err_remove_brightness;
1349
1350 acpi_device_dir(device) = device_dir;
1351
1352 return 0;
1353
1354 err_remove_brightness:
1355 remove_proc_entry("brightness", device_dir);
1356 err_remove_state:
1357 remove_proc_entry("state", device_dir);
1358 err_remove_info:
1359 remove_proc_entry("info", device_dir);
1360 err_remove_dir:
1361 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1362 return -ENOMEM;
1363 }
1364
1365 static int acpi_video_device_remove_fs(struct acpi_device *device)
1366 {
1367 struct acpi_video_device *vid_dev;
1368 struct proc_dir_entry *device_dir;
1369
1370 vid_dev = acpi_driver_data(device);
1371 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1372 return -ENODEV;
1373
1374 device_dir = acpi_device_dir(device);
1375 if (device_dir) {
1376 remove_proc_entry("info", device_dir);
1377 remove_proc_entry("state", device_dir);
1378 remove_proc_entry("brightness", device_dir);
1379 remove_proc_entry("EDID", device_dir);
1380 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1381 acpi_device_dir(device) = NULL;
1382 }
1383
1384 return 0;
1385 }
1386
1387 /* video bus */
1388 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1389 {
1390 struct acpi_video_bus *video = seq->private;
1391
1392
1393 if (!video)
1394 goto end;
1395
1396 seq_printf(seq, "Switching heads: %s\n",
1397 video->flags.multihead ? "yes" : "no");
1398 seq_printf(seq, "Video ROM: %s\n",
1399 video->flags.rom ? "yes" : "no");
1400 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1401 video->flags.post ? "yes" : "no");
1402
1403 end:
1404 return 0;
1405 }
1406
1407 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1408 {
1409 return single_open(file, acpi_video_bus_info_seq_show,
1410 PDE(inode)->data);
1411 }
1412
1413 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1414 {
1415 struct acpi_video_bus *video = seq->private;
1416
1417
1418 if (!video)
1419 goto end;
1420
1421 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1422 seq_printf(seq, "<TODO>\n");
1423
1424 end:
1425 return 0;
1426 }
1427
1428 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1429 {
1430 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1431 }
1432
1433 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1434 {
1435 struct acpi_video_bus *video = seq->private;
1436 unsigned long long options;
1437 int status;
1438
1439
1440 if (!video)
1441 goto end;
1442
1443 status = acpi_video_bus_POST_options(video, &options);
1444 if (ACPI_SUCCESS(status)) {
1445 if (!(options & 1)) {
1446 printk(KERN_WARNING PREFIX
1447 "The motherboard VGA device is not listed as a possible POST device.\n");
1448 printk(KERN_WARNING PREFIX
1449 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1450 }
1451 printk(KERN_WARNING "%llx\n", options);
1452 seq_printf(seq, "can POST: <integrated video>");
1453 if (options & 2)
1454 seq_printf(seq, " <PCI video>");
1455 if (options & 4)
1456 seq_printf(seq, " <AGP video>");
1457 seq_putc(seq, '\n');
1458 } else
1459 seq_printf(seq, "<not supported>\n");
1460 end:
1461 return 0;
1462 }
1463
1464 static int
1465 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1466 {
1467 return single_open(file, acpi_video_bus_POST_info_seq_show,
1468 PDE(inode)->data);
1469 }
1470
1471 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1472 {
1473 struct acpi_video_bus *video = seq->private;
1474 int status;
1475 unsigned long long id;
1476
1477
1478 if (!video)
1479 goto end;
1480
1481 status = acpi_video_bus_get_POST(video, &id);
1482 if (!ACPI_SUCCESS(status)) {
1483 seq_printf(seq, "<not supported>\n");
1484 goto end;
1485 }
1486 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1487
1488 end:
1489 return 0;
1490 }
1491
1492 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1493 {
1494 struct acpi_video_bus *video = seq->private;
1495
1496
1497 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1498
1499 return 0;
1500 }
1501
1502 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1503 {
1504 return single_open(file, acpi_video_bus_POST_seq_show,
1505 PDE(inode)->data);
1506 }
1507
1508 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1509 {
1510 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1511 }
1512
1513 static ssize_t
1514 acpi_video_bus_write_POST(struct file *file,
1515 const char __user * buffer,
1516 size_t count, loff_t * data)
1517 {
1518 int status;
1519 struct seq_file *m = file->private_data;
1520 struct acpi_video_bus *video = m->private;
1521 char str[12] = { 0 };
1522 unsigned long long opt, options;
1523
1524
1525 if (!video || count + 1 > sizeof str)
1526 return -EINVAL;
1527
1528 status = acpi_video_bus_POST_options(video, &options);
1529 if (!ACPI_SUCCESS(status))
1530 return -EINVAL;
1531
1532 if (copy_from_user(str, buffer, count))
1533 return -EFAULT;
1534
1535 str[count] = 0;
1536 opt = strtoul(str, NULL, 0);
1537 if (opt > 3)
1538 return -EFAULT;
1539
1540 /* just in case an OEM 'forgot' the motherboard... */
1541 options |= 1;
1542
1543 if (options & (1ul << opt)) {
1544 status = acpi_video_bus_set_POST(video, opt);
1545 if (!ACPI_SUCCESS(status))
1546 return -EFAULT;
1547
1548 }
1549
1550 return count;
1551 }
1552
1553 static ssize_t
1554 acpi_video_bus_write_DOS(struct file *file,
1555 const char __user * buffer,
1556 size_t count, loff_t * data)
1557 {
1558 int status;
1559 struct seq_file *m = file->private_data;
1560 struct acpi_video_bus *video = m->private;
1561 char str[12] = { 0 };
1562 unsigned long opt;
1563
1564
1565 if (!video || count + 1 > sizeof str)
1566 return -EINVAL;
1567
1568 if (copy_from_user(str, buffer, count))
1569 return -EFAULT;
1570
1571 str[count] = 0;
1572 opt = strtoul(str, NULL, 0);
1573 if (opt > 7)
1574 return -EFAULT;
1575
1576 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1577
1578 if (!ACPI_SUCCESS(status))
1579 return -EFAULT;
1580
1581 return count;
1582 }
1583
1584 static int acpi_video_bus_add_fs(struct acpi_device *device)
1585 {
1586 struct acpi_video_bus *video = acpi_driver_data(device);
1587 struct proc_dir_entry *device_dir;
1588 struct proc_dir_entry *entry;
1589
1590 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1591 if (!device_dir)
1592 return -ENOMEM;
1593
1594 /* 'info' [R] */
1595 entry = proc_create_data("info", S_IRUGO, device_dir,
1596 &acpi_video_bus_info_fops,
1597 acpi_driver_data(device));
1598 if (!entry)
1599 goto err_remove_dir;
1600
1601 /* 'ROM' [R] */
1602 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1603 &acpi_video_bus_ROM_fops,
1604 acpi_driver_data(device));
1605 if (!entry)
1606 goto err_remove_info;
1607
1608 /* 'POST_info' [R] */
1609 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1610 &acpi_video_bus_POST_info_fops,
1611 acpi_driver_data(device));
1612 if (!entry)
1613 goto err_remove_rom;
1614
1615 /* 'POST' [R/W] */
1616 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1617 device_dir,
1618 &acpi_video_bus_POST_fops,
1619 acpi_driver_data(device));
1620 if (!entry)
1621 goto err_remove_post_info;
1622
1623 /* 'DOS' [R/W] */
1624 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1625 device_dir,
1626 &acpi_video_bus_DOS_fops,
1627 acpi_driver_data(device));
1628 if (!entry)
1629 goto err_remove_post;
1630
1631 video->dir = acpi_device_dir(device) = device_dir;
1632 return 0;
1633
1634 err_remove_post:
1635 remove_proc_entry("POST", device_dir);
1636 err_remove_post_info:
1637 remove_proc_entry("POST_info", device_dir);
1638 err_remove_rom:
1639 remove_proc_entry("ROM", device_dir);
1640 err_remove_info:
1641 remove_proc_entry("info", device_dir);
1642 err_remove_dir:
1643 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1644 return -ENOMEM;
1645 }
1646
1647 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1648 {
1649 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1650
1651 if (device_dir) {
1652 remove_proc_entry("info", device_dir);
1653 remove_proc_entry("ROM", device_dir);
1654 remove_proc_entry("POST_info", device_dir);
1655 remove_proc_entry("POST", device_dir);
1656 remove_proc_entry("DOS", device_dir);
1657 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1658 acpi_device_dir(device) = NULL;
1659 }
1660
1661 return 0;
1662 }
1663
1664 /* --------------------------------------------------------------------------
1665 Driver Interface
1666 -------------------------------------------------------------------------- */
1667
1668 /* device interface */
1669 static struct acpi_video_device_attrib*
1670 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1671 {
1672 struct acpi_video_enumerated_device *ids;
1673 int i;
1674
1675 for (i = 0; i < video->attached_count; i++) {
1676 ids = &video->attached_array[i];
1677 if ((ids->value.int_val & 0xffff) == device_id)
1678 return &ids->value.attrib;
1679 }
1680
1681 return NULL;
1682 }
1683
1684 static int
1685 acpi_video_bus_get_one_device(struct acpi_device *device,
1686 struct acpi_video_bus *video)
1687 {
1688 unsigned long long device_id;
1689 int status;
1690 struct acpi_video_device *data;
1691 struct acpi_video_device_attrib* attribute;
1692
1693 if (!device || !video)
1694 return -EINVAL;
1695
1696 status =
1697 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1698 if (ACPI_SUCCESS(status)) {
1699
1700 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1701 if (!data)
1702 return -ENOMEM;
1703
1704 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1705 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1706 device->driver_data = data;
1707
1708 data->device_id = device_id;
1709 data->video = video;
1710 data->dev = device;
1711
1712 attribute = acpi_video_get_device_attr(video, device_id);
1713
1714 if((attribute != NULL) && attribute->device_id_scheme) {
1715 switch (attribute->display_type) {
1716 case ACPI_VIDEO_DISPLAY_CRT:
1717 data->flags.crt = 1;
1718 break;
1719 case ACPI_VIDEO_DISPLAY_TV:
1720 data->flags.tvout = 1;
1721 break;
1722 case ACPI_VIDEO_DISPLAY_DVI:
1723 data->flags.dvi = 1;
1724 break;
1725 case ACPI_VIDEO_DISPLAY_LCD:
1726 data->flags.lcd = 1;
1727 break;
1728 default:
1729 data->flags.unknown = 1;
1730 break;
1731 }
1732 if(attribute->bios_can_detect)
1733 data->flags.bios = 1;
1734 } else
1735 data->flags.unknown = 1;
1736
1737 acpi_video_device_bind(video, data);
1738 acpi_video_device_find_cap(data);
1739
1740 status = acpi_install_notify_handler(device->handle,
1741 ACPI_DEVICE_NOTIFY,
1742 acpi_video_device_notify,
1743 data);
1744 if (ACPI_FAILURE(status)) {
1745 printk(KERN_ERR PREFIX
1746 "Error installing notify handler\n");
1747 if(data->brightness)
1748 kfree(data->brightness->levels);
1749 kfree(data->brightness);
1750 kfree(data);
1751 return -ENODEV;
1752 }
1753
1754 mutex_lock(&video->device_list_lock);
1755 list_add_tail(&data->entry, &video->video_device_list);
1756 mutex_unlock(&video->device_list_lock);
1757
1758 acpi_video_device_add_fs(device);
1759
1760 return 0;
1761 }
1762
1763 return -ENOENT;
1764 }
1765
1766 /*
1767 * Arg:
1768 * video : video bus device
1769 *
1770 * Return:
1771 * none
1772 *
1773 * Enumerate the video device list of the video bus,
1774 * bind the ids with the corresponding video devices
1775 * under the video bus.
1776 */
1777
1778 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1779 {
1780 struct acpi_video_device *dev;
1781
1782 mutex_lock(&video->device_list_lock);
1783
1784 list_for_each_entry(dev, &video->video_device_list, entry)
1785 acpi_video_device_bind(video, dev);
1786
1787 mutex_unlock(&video->device_list_lock);
1788 }
1789
1790 /*
1791 * Arg:
1792 * video : video bus device
1793 * device : video output device under the video
1794 * bus
1795 *
1796 * Return:
1797 * none
1798 *
1799 * Bind the ids with the corresponding video devices
1800 * under the video bus.
1801 */
1802
1803 static void
1804 acpi_video_device_bind(struct acpi_video_bus *video,
1805 struct acpi_video_device *device)
1806 {
1807 struct acpi_video_enumerated_device *ids;
1808 int i;
1809
1810 for (i = 0; i < video->attached_count; i++) {
1811 ids = &video->attached_array[i];
1812 if (device->device_id == (ids->value.int_val & 0xffff)) {
1813 ids->bind_info = device;
1814 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1815 }
1816 }
1817 }
1818
1819 /*
1820 * Arg:
1821 * video : video bus device
1822 *
1823 * Return:
1824 * < 0 : error
1825 *
1826 * Call _DOD to enumerate all devices attached to display adapter
1827 *
1828 */
1829
1830 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1831 {
1832 int status;
1833 int count;
1834 int i;
1835 struct acpi_video_enumerated_device *active_list;
1836 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1837 union acpi_object *dod = NULL;
1838 union acpi_object *obj;
1839
1840 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1841 if (!ACPI_SUCCESS(status)) {
1842 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1843 return status;
1844 }
1845
1846 dod = buffer.pointer;
1847 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1848 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1849 status = -EFAULT;
1850 goto out;
1851 }
1852
1853 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1854 dod->package.count));
1855
1856 active_list = kcalloc(1 + dod->package.count,
1857 sizeof(struct acpi_video_enumerated_device),
1858 GFP_KERNEL);
1859 if (!active_list) {
1860 status = -ENOMEM;
1861 goto out;
1862 }
1863
1864 count = 0;
1865 for (i = 0; i < dod->package.count; i++) {
1866 obj = &dod->package.elements[i];
1867
1868 if (obj->type != ACPI_TYPE_INTEGER) {
1869 printk(KERN_ERR PREFIX
1870 "Invalid _DOD data in element %d\n", i);
1871 continue;
1872 }
1873
1874 active_list[count].value.int_val = obj->integer.value;
1875 active_list[count].bind_info = NULL;
1876 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1877 (int)obj->integer.value));
1878 count++;
1879 }
1880
1881 kfree(video->attached_array);
1882
1883 video->attached_array = active_list;
1884 video->attached_count = count;
1885
1886 out:
1887 kfree(buffer.pointer);
1888 return status;
1889 }
1890
1891 static int
1892 acpi_video_get_next_level(struct acpi_video_device *device,
1893 u32 level_current, u32 event)
1894 {
1895 int min, max, min_above, max_below, i, l, delta = 255;
1896 max = max_below = 0;
1897 min = min_above = 255;
1898 /* Find closest level to level_current */
1899 for (i = 2; i < device->brightness->count; i++) {
1900 l = device->brightness->levels[i];
1901 if (abs(l - level_current) < abs(delta)) {
1902 delta = l - level_current;
1903 if (!delta)
1904 break;
1905 }
1906 }
1907 /* Ajust level_current to closest available level */
1908 level_current += delta;
1909 for (i = 2; i < device->brightness->count; i++) {
1910 l = device->brightness->levels[i];
1911 if (l < min)
1912 min = l;
1913 if (l > max)
1914 max = l;
1915 if (l < min_above && l > level_current)
1916 min_above = l;
1917 if (l > max_below && l < level_current)
1918 max_below = l;
1919 }
1920
1921 switch (event) {
1922 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1923 return (level_current < max) ? min_above : min;
1924 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1925 return (level_current < max) ? min_above : max;
1926 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1927 return (level_current > min) ? max_below : min;
1928 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1929 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1930 return 0;
1931 default:
1932 return level_current;
1933 }
1934 }
1935
1936 static int
1937 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1938 {
1939 unsigned long long level_current, level_next;
1940 int result = -EINVAL;
1941
1942 if (!device->brightness)
1943 goto out;
1944
1945 result = acpi_video_device_lcd_get_level_current(device,
1946 &level_current);
1947 if (result)
1948 goto out;
1949
1950 level_next = acpi_video_get_next_level(device, level_current, event);
1951
1952 result = acpi_video_device_lcd_set_level(device, level_next);
1953
1954 out:
1955 if (result)
1956 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1957
1958 return result;
1959 }
1960
1961 static int
1962 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1963 struct acpi_device *device)
1964 {
1965 int status = 0;
1966 struct acpi_device *dev;
1967
1968 acpi_video_device_enumerate(video);
1969
1970 list_for_each_entry(dev, &device->children, node) {
1971
1972 status = acpi_video_bus_get_one_device(dev, video);
1973 if (ACPI_FAILURE(status)) {
1974 printk(KERN_WARNING PREFIX
1975 "Cant attach device");
1976 continue;
1977 }
1978 }
1979 return status;
1980 }
1981
1982 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1983 {
1984 acpi_status status;
1985 struct acpi_video_bus *video;
1986
1987
1988 if (!device || !device->video)
1989 return -ENOENT;
1990
1991 video = device->video;
1992
1993 acpi_video_device_remove_fs(device->dev);
1994
1995 status = acpi_remove_notify_handler(device->dev->handle,
1996 ACPI_DEVICE_NOTIFY,
1997 acpi_video_device_notify);
1998 sysfs_remove_link(&device->backlight->dev.kobj, "device");
1999 backlight_device_unregister(device->backlight);
2000 if (device->cdev) {
2001 sysfs_remove_link(&device->dev->dev.kobj,
2002 "thermal_cooling");
2003 sysfs_remove_link(&device->cdev->device.kobj,
2004 "device");
2005 thermal_cooling_device_unregister(device->cdev);
2006 device->cdev = NULL;
2007 }
2008 video_output_unregister(device->output_dev);
2009
2010 return 0;
2011 }
2012
2013 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
2014 {
2015 int status;
2016 struct acpi_video_device *dev, *next;
2017
2018 mutex_lock(&video->device_list_lock);
2019
2020 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
2021
2022 status = acpi_video_bus_put_one_device(dev);
2023 if (ACPI_FAILURE(status))
2024 printk(KERN_WARNING PREFIX
2025 "hhuuhhuu bug in acpi video driver.\n");
2026
2027 if (dev->brightness) {
2028 kfree(dev->brightness->levels);
2029 kfree(dev->brightness);
2030 }
2031 list_del(&dev->entry);
2032 kfree(dev);
2033 }
2034
2035 mutex_unlock(&video->device_list_lock);
2036
2037 return 0;
2038 }
2039
2040 /* acpi_video interface */
2041
2042 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
2043 {
2044 return acpi_video_bus_DOS(video, 0, 0);
2045 }
2046
2047 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
2048 {
2049 return acpi_video_bus_DOS(video, 0, 1);
2050 }
2051
2052 static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
2053 {
2054 struct acpi_video_bus *video = acpi_driver_data(device);
2055 struct input_dev *input;
2056 int keycode;
2057
2058 if (!video)
2059 return;
2060
2061 input = video->input;
2062
2063 switch (event) {
2064 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
2065 * most likely via hotkey. */
2066 acpi_bus_generate_proc_event(device, event, 0);
2067 keycode = KEY_SWITCHVIDEOMODE;
2068 break;
2069
2070 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
2071 * connector. */
2072 acpi_video_device_enumerate(video);
2073 acpi_video_device_rebind(video);
2074 acpi_bus_generate_proc_event(device, event, 0);
2075 keycode = KEY_SWITCHVIDEOMODE;
2076 break;
2077
2078 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2079 acpi_bus_generate_proc_event(device, event, 0);
2080 keycode = KEY_SWITCHVIDEOMODE;
2081 break;
2082 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2083 acpi_bus_generate_proc_event(device, event, 0);
2084 keycode = KEY_VIDEO_NEXT;
2085 break;
2086 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2087 acpi_bus_generate_proc_event(device, event, 0);
2088 keycode = KEY_VIDEO_PREV;
2089 break;
2090
2091 default:
2092 keycode = KEY_UNKNOWN;
2093 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2094 "Unsupported event [0x%x]\n", event));
2095 break;
2096 }
2097
2098 acpi_notifier_call_chain(device, event, 0);
2099 input_report_key(input, keycode, 1);
2100 input_sync(input);
2101 input_report_key(input, keycode, 0);
2102 input_sync(input);
2103
2104 return;
2105 }
2106
2107 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2108 {
2109 struct acpi_video_device *video_device = data;
2110 struct acpi_device *device = NULL;
2111 struct acpi_video_bus *bus;
2112 struct input_dev *input;
2113 int keycode;
2114
2115 if (!video_device)
2116 return;
2117
2118 device = video_device->dev;
2119 bus = video_device->video;
2120 input = bus->input;
2121
2122 switch (event) {
2123 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
2124 if (brightness_switch_enabled)
2125 acpi_video_switch_brightness(video_device, event);
2126 acpi_bus_generate_proc_event(device, event, 0);
2127 keycode = KEY_BRIGHTNESS_CYCLE;
2128 break;
2129 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
2130 if (brightness_switch_enabled)
2131 acpi_video_switch_brightness(video_device, event);
2132 acpi_bus_generate_proc_event(device, event, 0);
2133 keycode = KEY_BRIGHTNESSUP;
2134 break;
2135 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2136 if (brightness_switch_enabled)
2137 acpi_video_switch_brightness(video_device, event);
2138 acpi_bus_generate_proc_event(device, event, 0);
2139 keycode = KEY_BRIGHTNESSDOWN;
2140 break;
2141 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2142 if (brightness_switch_enabled)
2143 acpi_video_switch_brightness(video_device, event);
2144 acpi_bus_generate_proc_event(device, event, 0);
2145 keycode = KEY_BRIGHTNESS_ZERO;
2146 break;
2147 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2148 if (brightness_switch_enabled)
2149 acpi_video_switch_brightness(video_device, event);
2150 acpi_bus_generate_proc_event(device, event, 0);
2151 keycode = KEY_DISPLAY_OFF;
2152 break;
2153 default:
2154 keycode = KEY_UNKNOWN;
2155 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2156 "Unsupported event [0x%x]\n", event));
2157 break;
2158 }
2159
2160 acpi_notifier_call_chain(device, event, 0);
2161 input_report_key(input, keycode, 1);
2162 input_sync(input);
2163 input_report_key(input, keycode, 0);
2164 input_sync(input);
2165
2166 return;
2167 }
2168
2169 static int instance;
2170 static int acpi_video_resume(struct acpi_device *device)
2171 {
2172 struct acpi_video_bus *video;
2173 struct acpi_video_device *video_device;
2174 int i;
2175
2176 if (!device || !acpi_driver_data(device))
2177 return -EINVAL;
2178
2179 video = acpi_driver_data(device);
2180
2181 for (i = 0; i < video->attached_count; i++) {
2182 video_device = video->attached_array[i].bind_info;
2183 if (video_device && video_device->backlight)
2184 acpi_video_set_brightness(video_device->backlight);
2185 }
2186 return AE_OK;
2187 }
2188
2189 static int acpi_video_bus_add(struct acpi_device *device)
2190 {
2191 struct acpi_video_bus *video;
2192 struct input_dev *input;
2193 int error;
2194
2195 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2196 if (!video)
2197 return -ENOMEM;
2198
2199 /* a hack to fix the duplicate name "VID" problem on T61 */
2200 if (!strcmp(device->pnp.bus_id, "VID")) {
2201 if (instance)
2202 device->pnp.bus_id[3] = '0' + instance;
2203 instance ++;
2204 }
2205 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2206 if (!strcmp(device->pnp.bus_id, "VGA")) {
2207 if (instance)
2208 device->pnp.bus_id[3] = '0' + instance;
2209 instance++;
2210 }
2211
2212 video->device = device;
2213 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2214 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2215 device->driver_data = video;
2216
2217 acpi_video_bus_find_cap(video);
2218 error = acpi_video_bus_check(video);
2219 if (error)
2220 goto err_free_video;
2221
2222 error = acpi_video_bus_add_fs(device);
2223 if (error)
2224 goto err_free_video;
2225
2226 mutex_init(&video->device_list_lock);
2227 INIT_LIST_HEAD(&video->video_device_list);
2228
2229 acpi_video_bus_get_devices(video, device);
2230 acpi_video_bus_start_devices(video);
2231
2232 video->input = input = input_allocate_device();
2233 if (!input) {
2234 error = -ENOMEM;
2235 goto err_stop_video;
2236 }
2237
2238 snprintf(video->phys, sizeof(video->phys),
2239 "%s/video/input0", acpi_device_hid(video->device));
2240
2241 input->name = acpi_device_name(video->device);
2242 input->phys = video->phys;
2243 input->id.bustype = BUS_HOST;
2244 input->id.product = 0x06;
2245 input->dev.parent = &device->dev;
2246 input->evbit[0] = BIT(EV_KEY);
2247 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2248 set_bit(KEY_VIDEO_NEXT, input->keybit);
2249 set_bit(KEY_VIDEO_PREV, input->keybit);
2250 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2251 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2252 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2253 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2254 set_bit(KEY_DISPLAY_OFF, input->keybit);
2255 set_bit(KEY_UNKNOWN, input->keybit);
2256
2257 error = input_register_device(input);
2258 if (error)
2259 goto err_free_input_dev;
2260
2261 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2262 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2263 video->flags.multihead ? "yes" : "no",
2264 video->flags.rom ? "yes" : "no",
2265 video->flags.post ? "yes" : "no");
2266
2267 return 0;
2268
2269 err_free_input_dev:
2270 input_free_device(input);
2271 err_stop_video:
2272 acpi_video_bus_stop_devices(video);
2273 acpi_video_bus_put_devices(video);
2274 kfree(video->attached_array);
2275 acpi_video_bus_remove_fs(device);
2276 err_free_video:
2277 kfree(video);
2278 device->driver_data = NULL;
2279
2280 return error;
2281 }
2282
2283 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2284 {
2285 struct acpi_video_bus *video = NULL;
2286
2287
2288 if (!device || !acpi_driver_data(device))
2289 return -EINVAL;
2290
2291 video = acpi_driver_data(device);
2292
2293 acpi_video_bus_stop_devices(video);
2294 acpi_video_bus_put_devices(video);
2295 acpi_video_bus_remove_fs(device);
2296
2297 input_unregister_device(video->input);
2298 kfree(video->attached_array);
2299 kfree(video);
2300
2301 return 0;
2302 }
2303
2304 static int __init intel_opregion_present(void)
2305 {
2306 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2307 struct pci_dev *dev = NULL;
2308 u32 address;
2309
2310 for_each_pci_dev(dev) {
2311 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2312 continue;
2313 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2314 continue;
2315 pci_read_config_dword(dev, 0xfc, &address);
2316 if (!address)
2317 continue;
2318 return 1;
2319 }
2320 #endif
2321 return 0;
2322 }
2323
2324 int acpi_video_register(void)
2325 {
2326 int result = 0;
2327
2328 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2329 if (!acpi_video_dir)
2330 return -ENODEV;
2331
2332 result = acpi_bus_register_driver(&acpi_video_bus);
2333 if (result < 0) {
2334 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2335 return -ENODEV;
2336 }
2337
2338 return 0;
2339 }
2340 EXPORT_SYMBOL(acpi_video_register);
2341
2342 /*
2343 * This is kind of nasty. Hardware using Intel chipsets may require
2344 * the video opregion code to be run first in order to initialise
2345 * state before any ACPI video calls are made. To handle this we defer
2346 * registration of the video class until the opregion code has run.
2347 */
2348
2349 static int __init acpi_video_init(void)
2350 {
2351 dmi_check_system(video_dmi_table);
2352
2353 if (intel_opregion_present())
2354 return 0;
2355
2356 return acpi_video_register();
2357 }
2358
2359 void acpi_video_exit(void)
2360 {
2361
2362 acpi_bus_unregister_driver(&acpi_video_bus);
2363
2364 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2365
2366 return;
2367 }
2368 EXPORT_SYMBOL(acpi_video_exit);
2369
2370 module_init(acpi_video_init);
2371 module_exit(acpi_video_exit);
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