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ACPI: video: DMI workaround broken eMachines E510 BIOS enabling display brightness
[deliverable/linux.git] / drivers / acpi / video.c
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <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 };
583
584 static int
585 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
586 unsigned long long *level)
587 {
588 acpi_status status = AE_OK;
589
590 if (device->cap._BQC || device->cap._BCQ) {
591 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
592
593 status = acpi_evaluate_integer(device->dev->handle, buf,
594 NULL, level);
595 if (ACPI_SUCCESS(status)) {
596 if (device->brightness->flags._BQC_use_index) {
597 if (device->brightness->flags._BCL_reversed)
598 *level = device->brightness->count
599 - 3 - (*level);
600 *level = device->brightness->levels[*level + 2];
601
602 }
603 *level += bqc_offset_aml_bug_workaround;
604 device->brightness->curr = *level;
605 return 0;
606 } else {
607 /* Fixme:
608 * should we return an error or ignore this failure?
609 * dev->brightness->curr is a cached value which stores
610 * the correct current backlight level in most cases.
611 * ACPI video backlight still works w/ buggy _BQC.
612 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
613 */
614 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
615 device->cap._BQC = device->cap._BCQ = 0;
616 }
617 }
618
619 *level = device->brightness->curr;
620 return 0;
621 }
622
623 static int
624 acpi_video_device_EDID(struct acpi_video_device *device,
625 union acpi_object **edid, ssize_t length)
626 {
627 int status;
628 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
629 union acpi_object *obj;
630 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
631 struct acpi_object_list args = { 1, &arg0 };
632
633
634 *edid = NULL;
635
636 if (!device)
637 return -ENODEV;
638 if (length == 128)
639 arg0.integer.value = 1;
640 else if (length == 256)
641 arg0.integer.value = 2;
642 else
643 return -EINVAL;
644
645 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
646 if (ACPI_FAILURE(status))
647 return -ENODEV;
648
649 obj = buffer.pointer;
650
651 if (obj && obj->type == ACPI_TYPE_BUFFER)
652 *edid = obj;
653 else {
654 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
655 status = -EFAULT;
656 kfree(obj);
657 }
658
659 return status;
660 }
661
662 /* bus */
663
664 static int
665 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
666 {
667 int status;
668 unsigned long long tmp;
669 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
670 struct acpi_object_list args = { 1, &arg0 };
671
672
673 arg0.integer.value = option;
674
675 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
676 if (ACPI_SUCCESS(status))
677 status = tmp ? (-EINVAL) : (AE_OK);
678
679 return status;
680 }
681
682 static int
683 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
684 {
685 int status;
686
687 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
688
689 return status;
690 }
691
692 static int
693 acpi_video_bus_POST_options(struct acpi_video_bus *video,
694 unsigned long long *options)
695 {
696 int status;
697
698 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
699 *options &= 3;
700
701 return status;
702 }
703
704 /*
705 * Arg:
706 * video : video bus device pointer
707 * bios_flag :
708 * 0. The system BIOS should NOT automatically switch(toggle)
709 * the active display output.
710 * 1. The system BIOS should automatically switch (toggle) the
711 * active display output. No switch event.
712 * 2. The _DGS value should be locked.
713 * 3. The system BIOS should not automatically switch (toggle) the
714 * active display output, but instead generate the display switch
715 * event notify code.
716 * lcd_flag :
717 * 0. The system BIOS should automatically control the brightness level
718 * of the LCD when the power changes from AC to DC
719 * 1. The system BIOS should NOT automatically control the brightness
720 * level of the LCD when the power changes from AC to DC.
721 * Return Value:
722 * -1 wrong arg.
723 */
724
725 static int
726 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
727 {
728 acpi_integer status = 0;
729 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
730 struct acpi_object_list args = { 1, &arg0 };
731
732
733 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
734 status = -1;
735 goto Failed;
736 }
737 arg0.integer.value = (lcd_flag << 2) | bios_flag;
738 video->dos_setting = arg0.integer.value;
739 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
740
741 Failed:
742 return status;
743 }
744
745 /*
746 * Simple comparison function used to sort backlight levels.
747 */
748
749 static int
750 acpi_video_cmp_level(const void *a, const void *b)
751 {
752 return *(int *)a - *(int *)b;
753 }
754
755 /*
756 * Arg:
757 * device : video output device (LCD, CRT, ..)
758 *
759 * Return Value:
760 * Maximum brightness level
761 *
762 * Allocate and initialize device->brightness.
763 */
764
765 static int
766 acpi_video_init_brightness(struct acpi_video_device *device)
767 {
768 union acpi_object *obj = NULL;
769 int i, max_level = 0, count = 0, level_ac_battery = 0;
770 unsigned long long level, level_old;
771 union acpi_object *o;
772 struct acpi_video_device_brightness *br = NULL;
773 int result = -EINVAL;
774
775 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
776 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
777 "LCD brightness level\n"));
778 goto out;
779 }
780
781 if (obj->package.count < 2)
782 goto out;
783
784 br = kzalloc(sizeof(*br), GFP_KERNEL);
785 if (!br) {
786 printk(KERN_ERR "can't allocate memory\n");
787 result = -ENOMEM;
788 goto out;
789 }
790
791 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
792 GFP_KERNEL);
793 if (!br->levels) {
794 result = -ENOMEM;
795 goto out_free;
796 }
797
798 for (i = 0; i < obj->package.count; i++) {
799 o = (union acpi_object *)&obj->package.elements[i];
800 if (o->type != ACPI_TYPE_INTEGER) {
801 printk(KERN_ERR PREFIX "Invalid data\n");
802 continue;
803 }
804 br->levels[count] = (u32) o->integer.value;
805
806 if (br->levels[count] > max_level)
807 max_level = br->levels[count];
808 count++;
809 }
810
811 /*
812 * some buggy BIOS don't export the levels
813 * when machine is on AC/Battery in _BCL package.
814 * In this case, the first two elements in _BCL packages
815 * are also supported brightness levels that OS should take care of.
816 */
817 for (i = 2; i < count; i++) {
818 if (br->levels[i] == br->levels[0])
819 level_ac_battery++;
820 if (br->levels[i] == br->levels[1])
821 level_ac_battery++;
822 }
823
824 if (level_ac_battery < 2) {
825 level_ac_battery = 2 - level_ac_battery;
826 br->flags._BCL_no_ac_battery_levels = 1;
827 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
828 br->levels[i] = br->levels[i - level_ac_battery];
829 count += level_ac_battery;
830 } else if (level_ac_battery > 2)
831 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
832
833 /* Check if the _BCL package is in a reversed order */
834 if (max_level == br->levels[2]) {
835 br->flags._BCL_reversed = 1;
836 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
837 acpi_video_cmp_level, NULL);
838 } else if (max_level != br->levels[count - 1])
839 ACPI_ERROR((AE_INFO,
840 "Found unordered _BCL package\n"));
841
842 br->count = count;
843 device->brightness = br;
844
845 /* Check the input/output of _BQC/_BCL/_BCM */
846 if ((max_level < 100) && (max_level <= (count - 2)))
847 br->flags._BCL_use_index = 1;
848
849 /*
850 * _BCM is always consistent with _BCL,
851 * at least for all the laptops we have ever seen.
852 */
853 br->flags._BCM_use_index = br->flags._BCL_use_index;
854
855 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
856 br->curr = level_old = max_level;
857
858 if (!device->cap._BQC)
859 goto set_level;
860
861 result = acpi_video_device_lcd_get_level_current(device, &level_old);
862 if (result)
863 goto out_free_levels;
864
865 /*
866 * Set the level to maximum and check if _BQC uses indexed value
867 */
868 result = acpi_video_device_lcd_set_level(device, max_level);
869 if (result)
870 goto out_free_levels;
871
872 result = acpi_video_device_lcd_get_level_current(device, &level);
873 if (result)
874 goto out_free_levels;
875
876 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
877
878 if (!br->flags._BQC_use_index)
879 goto set_level;
880
881 if (br->flags._BCL_reversed)
882 level_old = (br->count - 1) - level_old;
883 level_old = br->levels[level_old];
884
885 set_level:
886 result = acpi_video_device_lcd_set_level(device, level_old);
887 if (result)
888 goto out_free_levels;
889
890 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
891 "found %d brightness levels\n", count - 2));
892 kfree(obj);
893 return result;
894
895 out_free_levels:
896 kfree(br->levels);
897 out_free:
898 kfree(br);
899 out:
900 device->brightness = NULL;
901 kfree(obj);
902 return result;
903 }
904
905 /*
906 * Arg:
907 * device : video output device (LCD, CRT, ..)
908 *
909 * Return Value:
910 * None
911 *
912 * Find out all required AML methods defined under the output
913 * device.
914 */
915
916 static void acpi_video_device_find_cap(struct acpi_video_device *device)
917 {
918 acpi_handle h_dummy1;
919
920
921 memset(&device->cap, 0, sizeof(device->cap));
922
923 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
924 device->cap._ADR = 1;
925 }
926 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
927 device->cap._BCL = 1;
928 }
929 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
930 device->cap._BCM = 1;
931 }
932 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
933 device->cap._BQC = 1;
934 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
935 &h_dummy1))) {
936 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
937 device->cap._BCQ = 1;
938 }
939
940 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
941 device->cap._DDC = 1;
942 }
943 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
944 device->cap._DCS = 1;
945 }
946 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
947 device->cap._DGS = 1;
948 }
949 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
950 device->cap._DSS = 1;
951 }
952
953 if (acpi_video_backlight_support()) {
954 int result;
955 static int count = 0;
956 char *name;
957
958 result = acpi_video_init_brightness(device);
959 if (result)
960 return;
961 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
962 if (!name)
963 return;
964
965 sprintf(name, "acpi_video%d", count++);
966 device->backlight = backlight_device_register(name,
967 NULL, device, &acpi_backlight_ops);
968 device->backlight->props.max_brightness = device->brightness->count-3;
969 kfree(name);
970
971 device->cdev = thermal_cooling_device_register("LCD",
972 device->dev, &video_cooling_ops);
973 if (IS_ERR(device->cdev))
974 return;
975
976 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
977 device->cdev->id);
978 result = sysfs_create_link(&device->dev->dev.kobj,
979 &device->cdev->device.kobj,
980 "thermal_cooling");
981 if (result)
982 printk(KERN_ERR PREFIX "Create sysfs link\n");
983 result = sysfs_create_link(&device->cdev->device.kobj,
984 &device->dev->dev.kobj, "device");
985 if (result)
986 printk(KERN_ERR PREFIX "Create sysfs link\n");
987
988 }
989
990 if (acpi_video_display_switch_support()) {
991
992 if (device->cap._DCS && device->cap._DSS) {
993 static int count;
994 char *name;
995 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
996 if (!name)
997 return;
998 sprintf(name, "acpi_video%d", count++);
999 device->output_dev = video_output_register(name,
1000 NULL, device, &acpi_output_properties);
1001 kfree(name);
1002 }
1003 }
1004 }
1005
1006 /*
1007 * Arg:
1008 * device : video output device (VGA)
1009 *
1010 * Return Value:
1011 * None
1012 *
1013 * Find out all required AML methods defined under the video bus device.
1014 */
1015
1016 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
1017 {
1018 acpi_handle h_dummy1;
1019
1020 memset(&video->cap, 0, sizeof(video->cap));
1021 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
1022 video->cap._DOS = 1;
1023 }
1024 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
1025 video->cap._DOD = 1;
1026 }
1027 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
1028 video->cap._ROM = 1;
1029 }
1030 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
1031 video->cap._GPD = 1;
1032 }
1033 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
1034 video->cap._SPD = 1;
1035 }
1036 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
1037 video->cap._VPO = 1;
1038 }
1039 }
1040
1041 /*
1042 * Check whether the video bus device has required AML method to
1043 * support the desired features
1044 */
1045
1046 static int acpi_video_bus_check(struct acpi_video_bus *video)
1047 {
1048 acpi_status status = -ENOENT;
1049 struct device *dev;
1050
1051 if (!video)
1052 return -EINVAL;
1053
1054 dev = acpi_get_physical_pci_device(video->device->handle);
1055 if (!dev)
1056 return -ENODEV;
1057 put_device(dev);
1058
1059 /* Since there is no HID, CID and so on for VGA driver, we have
1060 * to check well known required nodes.
1061 */
1062
1063 /* Does this device support video switching? */
1064 if (video->cap._DOS) {
1065 video->flags.multihead = 1;
1066 status = 0;
1067 }
1068
1069 /* Does this device support retrieving a video ROM? */
1070 if (video->cap._ROM) {
1071 video->flags.rom = 1;
1072 status = 0;
1073 }
1074
1075 /* Does this device support configuring which video device to POST? */
1076 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1077 video->flags.post = 1;
1078 status = 0;
1079 }
1080
1081 return status;
1082 }
1083
1084 /* --------------------------------------------------------------------------
1085 FS Interface (/proc)
1086 -------------------------------------------------------------------------- */
1087
1088 static struct proc_dir_entry *acpi_video_dir;
1089
1090 /* video devices */
1091
1092 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1093 {
1094 struct acpi_video_device *dev = seq->private;
1095
1096
1097 if (!dev)
1098 goto end;
1099
1100 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1101 seq_printf(seq, "type: ");
1102 if (dev->flags.crt)
1103 seq_printf(seq, "CRT\n");
1104 else if (dev->flags.lcd)
1105 seq_printf(seq, "LCD\n");
1106 else if (dev->flags.tvout)
1107 seq_printf(seq, "TVOUT\n");
1108 else if (dev->flags.dvi)
1109 seq_printf(seq, "DVI\n");
1110 else
1111 seq_printf(seq, "UNKNOWN\n");
1112
1113 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1114
1115 end:
1116 return 0;
1117 }
1118
1119 static int
1120 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1121 {
1122 return single_open(file, acpi_video_device_info_seq_show,
1123 PDE(inode)->data);
1124 }
1125
1126 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1127 {
1128 int status;
1129 struct acpi_video_device *dev = seq->private;
1130 unsigned long long state;
1131
1132
1133 if (!dev)
1134 goto end;
1135
1136 status = acpi_video_device_get_state(dev, &state);
1137 seq_printf(seq, "state: ");
1138 if (ACPI_SUCCESS(status))
1139 seq_printf(seq, "0x%02llx\n", state);
1140 else
1141 seq_printf(seq, "<not supported>\n");
1142
1143 status = acpi_video_device_query(dev, &state);
1144 seq_printf(seq, "query: ");
1145 if (ACPI_SUCCESS(status))
1146 seq_printf(seq, "0x%02llx\n", state);
1147 else
1148 seq_printf(seq, "<not supported>\n");
1149
1150 end:
1151 return 0;
1152 }
1153
1154 static int
1155 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1156 {
1157 return single_open(file, acpi_video_device_state_seq_show,
1158 PDE(inode)->data);
1159 }
1160
1161 static ssize_t
1162 acpi_video_device_write_state(struct file *file,
1163 const char __user * buffer,
1164 size_t count, loff_t * data)
1165 {
1166 int status;
1167 struct seq_file *m = file->private_data;
1168 struct acpi_video_device *dev = m->private;
1169 char str[12] = { 0 };
1170 u32 state = 0;
1171
1172
1173 if (!dev || count + 1 > sizeof str)
1174 return -EINVAL;
1175
1176 if (copy_from_user(str, buffer, count))
1177 return -EFAULT;
1178
1179 str[count] = 0;
1180 state = simple_strtoul(str, NULL, 0);
1181 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1182
1183 status = acpi_video_device_set_state(dev, state);
1184
1185 if (status)
1186 return -EFAULT;
1187
1188 return count;
1189 }
1190
1191 static int
1192 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1193 {
1194 struct acpi_video_device *dev = seq->private;
1195 int i;
1196
1197
1198 if (!dev || !dev->brightness) {
1199 seq_printf(seq, "<not supported>\n");
1200 return 0;
1201 }
1202
1203 seq_printf(seq, "levels: ");
1204 for (i = 2; i < dev->brightness->count; i++)
1205 seq_printf(seq, " %d", dev->brightness->levels[i]);
1206 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1207
1208 return 0;
1209 }
1210
1211 static int
1212 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1213 {
1214 return single_open(file, acpi_video_device_brightness_seq_show,
1215 PDE(inode)->data);
1216 }
1217
1218 static ssize_t
1219 acpi_video_device_write_brightness(struct file *file,
1220 const char __user * buffer,
1221 size_t count, loff_t * data)
1222 {
1223 struct seq_file *m = file->private_data;
1224 struct acpi_video_device *dev = m->private;
1225 char str[5] = { 0 };
1226 unsigned int level = 0;
1227 int i;
1228
1229
1230 if (!dev || !dev->brightness || count + 1 > sizeof str)
1231 return -EINVAL;
1232
1233 if (copy_from_user(str, buffer, count))
1234 return -EFAULT;
1235
1236 str[count] = 0;
1237 level = simple_strtoul(str, NULL, 0);
1238
1239 if (level > 100)
1240 return -EFAULT;
1241
1242 /* validate through the list of available levels */
1243 for (i = 2; i < dev->brightness->count; i++)
1244 if (level == dev->brightness->levels[i]) {
1245 if (!acpi_video_device_lcd_set_level(dev, level))
1246 return count;
1247 break;
1248 }
1249
1250 return -EINVAL;
1251 }
1252
1253 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1254 {
1255 struct acpi_video_device *dev = seq->private;
1256 int status;
1257 int i;
1258 union acpi_object *edid = NULL;
1259
1260
1261 if (!dev)
1262 goto out;
1263
1264 status = acpi_video_device_EDID(dev, &edid, 128);
1265 if (ACPI_FAILURE(status)) {
1266 status = acpi_video_device_EDID(dev, &edid, 256);
1267 }
1268
1269 if (ACPI_FAILURE(status)) {
1270 goto out;
1271 }
1272
1273 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1274 for (i = 0; i < edid->buffer.length; i++)
1275 seq_putc(seq, edid->buffer.pointer[i]);
1276 }
1277
1278 out:
1279 if (!edid)
1280 seq_printf(seq, "<not supported>\n");
1281 else
1282 kfree(edid);
1283
1284 return 0;
1285 }
1286
1287 static int
1288 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1289 {
1290 return single_open(file, acpi_video_device_EDID_seq_show,
1291 PDE(inode)->data);
1292 }
1293
1294 static int acpi_video_device_add_fs(struct acpi_device *device)
1295 {
1296 struct proc_dir_entry *entry, *device_dir;
1297 struct acpi_video_device *vid_dev;
1298
1299 vid_dev = acpi_driver_data(device);
1300 if (!vid_dev)
1301 return -ENODEV;
1302
1303 device_dir = proc_mkdir(acpi_device_bid(device),
1304 vid_dev->video->dir);
1305 if (!device_dir)
1306 return -ENOMEM;
1307
1308 /* 'info' [R] */
1309 entry = proc_create_data("info", S_IRUGO, device_dir,
1310 &acpi_video_device_info_fops, acpi_driver_data(device));
1311 if (!entry)
1312 goto err_remove_dir;
1313
1314 /* 'state' [R/W] */
1315 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1316 device_dir,
1317 &acpi_video_device_state_fops,
1318 acpi_driver_data(device));
1319 if (!entry)
1320 goto err_remove_info;
1321
1322 /* 'brightness' [R/W] */
1323 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1324 device_dir,
1325 &acpi_video_device_brightness_fops,
1326 acpi_driver_data(device));
1327 if (!entry)
1328 goto err_remove_state;
1329
1330 /* 'EDID' [R] */
1331 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1332 &acpi_video_device_EDID_fops,
1333 acpi_driver_data(device));
1334 if (!entry)
1335 goto err_remove_brightness;
1336
1337 acpi_device_dir(device) = device_dir;
1338
1339 return 0;
1340
1341 err_remove_brightness:
1342 remove_proc_entry("brightness", device_dir);
1343 err_remove_state:
1344 remove_proc_entry("state", device_dir);
1345 err_remove_info:
1346 remove_proc_entry("info", device_dir);
1347 err_remove_dir:
1348 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1349 return -ENOMEM;
1350 }
1351
1352 static int acpi_video_device_remove_fs(struct acpi_device *device)
1353 {
1354 struct acpi_video_device *vid_dev;
1355 struct proc_dir_entry *device_dir;
1356
1357 vid_dev = acpi_driver_data(device);
1358 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1359 return -ENODEV;
1360
1361 device_dir = acpi_device_dir(device);
1362 if (device_dir) {
1363 remove_proc_entry("info", device_dir);
1364 remove_proc_entry("state", device_dir);
1365 remove_proc_entry("brightness", device_dir);
1366 remove_proc_entry("EDID", device_dir);
1367 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1368 acpi_device_dir(device) = NULL;
1369 }
1370
1371 return 0;
1372 }
1373
1374 /* video bus */
1375 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1376 {
1377 struct acpi_video_bus *video = seq->private;
1378
1379
1380 if (!video)
1381 goto end;
1382
1383 seq_printf(seq, "Switching heads: %s\n",
1384 video->flags.multihead ? "yes" : "no");
1385 seq_printf(seq, "Video ROM: %s\n",
1386 video->flags.rom ? "yes" : "no");
1387 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1388 video->flags.post ? "yes" : "no");
1389
1390 end:
1391 return 0;
1392 }
1393
1394 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1395 {
1396 return single_open(file, acpi_video_bus_info_seq_show,
1397 PDE(inode)->data);
1398 }
1399
1400 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1401 {
1402 struct acpi_video_bus *video = seq->private;
1403
1404
1405 if (!video)
1406 goto end;
1407
1408 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1409 seq_printf(seq, "<TODO>\n");
1410
1411 end:
1412 return 0;
1413 }
1414
1415 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1416 {
1417 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1418 }
1419
1420 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1421 {
1422 struct acpi_video_bus *video = seq->private;
1423 unsigned long long options;
1424 int status;
1425
1426
1427 if (!video)
1428 goto end;
1429
1430 status = acpi_video_bus_POST_options(video, &options);
1431 if (ACPI_SUCCESS(status)) {
1432 if (!(options & 1)) {
1433 printk(KERN_WARNING PREFIX
1434 "The motherboard VGA device is not listed as a possible POST device.\n");
1435 printk(KERN_WARNING PREFIX
1436 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1437 }
1438 printk(KERN_WARNING "%llx\n", options);
1439 seq_printf(seq, "can POST: <integrated video>");
1440 if (options & 2)
1441 seq_printf(seq, " <PCI video>");
1442 if (options & 4)
1443 seq_printf(seq, " <AGP video>");
1444 seq_putc(seq, '\n');
1445 } else
1446 seq_printf(seq, "<not supported>\n");
1447 end:
1448 return 0;
1449 }
1450
1451 static int
1452 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1453 {
1454 return single_open(file, acpi_video_bus_POST_info_seq_show,
1455 PDE(inode)->data);
1456 }
1457
1458 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1459 {
1460 struct acpi_video_bus *video = seq->private;
1461 int status;
1462 unsigned long long id;
1463
1464
1465 if (!video)
1466 goto end;
1467
1468 status = acpi_video_bus_get_POST(video, &id);
1469 if (!ACPI_SUCCESS(status)) {
1470 seq_printf(seq, "<not supported>\n");
1471 goto end;
1472 }
1473 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1474
1475 end:
1476 return 0;
1477 }
1478
1479 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1480 {
1481 struct acpi_video_bus *video = seq->private;
1482
1483
1484 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1485
1486 return 0;
1487 }
1488
1489 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1490 {
1491 return single_open(file, acpi_video_bus_POST_seq_show,
1492 PDE(inode)->data);
1493 }
1494
1495 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1496 {
1497 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1498 }
1499
1500 static ssize_t
1501 acpi_video_bus_write_POST(struct file *file,
1502 const char __user * buffer,
1503 size_t count, loff_t * data)
1504 {
1505 int status;
1506 struct seq_file *m = file->private_data;
1507 struct acpi_video_bus *video = m->private;
1508 char str[12] = { 0 };
1509 unsigned long long opt, options;
1510
1511
1512 if (!video || count + 1 > sizeof str)
1513 return -EINVAL;
1514
1515 status = acpi_video_bus_POST_options(video, &options);
1516 if (!ACPI_SUCCESS(status))
1517 return -EINVAL;
1518
1519 if (copy_from_user(str, buffer, count))
1520 return -EFAULT;
1521
1522 str[count] = 0;
1523 opt = strtoul(str, NULL, 0);
1524 if (opt > 3)
1525 return -EFAULT;
1526
1527 /* just in case an OEM 'forgot' the motherboard... */
1528 options |= 1;
1529
1530 if (options & (1ul << opt)) {
1531 status = acpi_video_bus_set_POST(video, opt);
1532 if (!ACPI_SUCCESS(status))
1533 return -EFAULT;
1534
1535 }
1536
1537 return count;
1538 }
1539
1540 static ssize_t
1541 acpi_video_bus_write_DOS(struct file *file,
1542 const char __user * buffer,
1543 size_t count, loff_t * data)
1544 {
1545 int status;
1546 struct seq_file *m = file->private_data;
1547 struct acpi_video_bus *video = m->private;
1548 char str[12] = { 0 };
1549 unsigned long opt;
1550
1551
1552 if (!video || count + 1 > sizeof str)
1553 return -EINVAL;
1554
1555 if (copy_from_user(str, buffer, count))
1556 return -EFAULT;
1557
1558 str[count] = 0;
1559 opt = strtoul(str, NULL, 0);
1560 if (opt > 7)
1561 return -EFAULT;
1562
1563 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1564
1565 if (!ACPI_SUCCESS(status))
1566 return -EFAULT;
1567
1568 return count;
1569 }
1570
1571 static int acpi_video_bus_add_fs(struct acpi_device *device)
1572 {
1573 struct acpi_video_bus *video = acpi_driver_data(device);
1574 struct proc_dir_entry *device_dir;
1575 struct proc_dir_entry *entry;
1576
1577 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1578 if (!device_dir)
1579 return -ENOMEM;
1580
1581 /* 'info' [R] */
1582 entry = proc_create_data("info", S_IRUGO, device_dir,
1583 &acpi_video_bus_info_fops,
1584 acpi_driver_data(device));
1585 if (!entry)
1586 goto err_remove_dir;
1587
1588 /* 'ROM' [R] */
1589 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1590 &acpi_video_bus_ROM_fops,
1591 acpi_driver_data(device));
1592 if (!entry)
1593 goto err_remove_info;
1594
1595 /* 'POST_info' [R] */
1596 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1597 &acpi_video_bus_POST_info_fops,
1598 acpi_driver_data(device));
1599 if (!entry)
1600 goto err_remove_rom;
1601
1602 /* 'POST' [R/W] */
1603 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1604 device_dir,
1605 &acpi_video_bus_POST_fops,
1606 acpi_driver_data(device));
1607 if (!entry)
1608 goto err_remove_post_info;
1609
1610 /* 'DOS' [R/W] */
1611 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1612 device_dir,
1613 &acpi_video_bus_DOS_fops,
1614 acpi_driver_data(device));
1615 if (!entry)
1616 goto err_remove_post;
1617
1618 video->dir = acpi_device_dir(device) = device_dir;
1619 return 0;
1620
1621 err_remove_post:
1622 remove_proc_entry("POST", device_dir);
1623 err_remove_post_info:
1624 remove_proc_entry("POST_info", device_dir);
1625 err_remove_rom:
1626 remove_proc_entry("ROM", device_dir);
1627 err_remove_info:
1628 remove_proc_entry("info", device_dir);
1629 err_remove_dir:
1630 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1631 return -ENOMEM;
1632 }
1633
1634 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1635 {
1636 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1637
1638 if (device_dir) {
1639 remove_proc_entry("info", device_dir);
1640 remove_proc_entry("ROM", device_dir);
1641 remove_proc_entry("POST_info", device_dir);
1642 remove_proc_entry("POST", device_dir);
1643 remove_proc_entry("DOS", device_dir);
1644 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1645 acpi_device_dir(device) = NULL;
1646 }
1647
1648 return 0;
1649 }
1650
1651 /* --------------------------------------------------------------------------
1652 Driver Interface
1653 -------------------------------------------------------------------------- */
1654
1655 /* device interface */
1656 static struct acpi_video_device_attrib*
1657 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1658 {
1659 struct acpi_video_enumerated_device *ids;
1660 int i;
1661
1662 for (i = 0; i < video->attached_count; i++) {
1663 ids = &video->attached_array[i];
1664 if ((ids->value.int_val & 0xffff) == device_id)
1665 return &ids->value.attrib;
1666 }
1667
1668 return NULL;
1669 }
1670
1671 static int
1672 acpi_video_bus_get_one_device(struct acpi_device *device,
1673 struct acpi_video_bus *video)
1674 {
1675 unsigned long long device_id;
1676 int status;
1677 struct acpi_video_device *data;
1678 struct acpi_video_device_attrib* attribute;
1679
1680 if (!device || !video)
1681 return -EINVAL;
1682
1683 status =
1684 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1685 if (ACPI_SUCCESS(status)) {
1686
1687 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1688 if (!data)
1689 return -ENOMEM;
1690
1691 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1692 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1693 device->driver_data = data;
1694
1695 data->device_id = device_id;
1696 data->video = video;
1697 data->dev = device;
1698
1699 attribute = acpi_video_get_device_attr(video, device_id);
1700
1701 if((attribute != NULL) && attribute->device_id_scheme) {
1702 switch (attribute->display_type) {
1703 case ACPI_VIDEO_DISPLAY_CRT:
1704 data->flags.crt = 1;
1705 break;
1706 case ACPI_VIDEO_DISPLAY_TV:
1707 data->flags.tvout = 1;
1708 break;
1709 case ACPI_VIDEO_DISPLAY_DVI:
1710 data->flags.dvi = 1;
1711 break;
1712 case ACPI_VIDEO_DISPLAY_LCD:
1713 data->flags.lcd = 1;
1714 break;
1715 default:
1716 data->flags.unknown = 1;
1717 break;
1718 }
1719 if(attribute->bios_can_detect)
1720 data->flags.bios = 1;
1721 } else
1722 data->flags.unknown = 1;
1723
1724 acpi_video_device_bind(video, data);
1725 acpi_video_device_find_cap(data);
1726
1727 status = acpi_install_notify_handler(device->handle,
1728 ACPI_DEVICE_NOTIFY,
1729 acpi_video_device_notify,
1730 data);
1731 if (ACPI_FAILURE(status)) {
1732 printk(KERN_ERR PREFIX
1733 "Error installing notify handler\n");
1734 if(data->brightness)
1735 kfree(data->brightness->levels);
1736 kfree(data->brightness);
1737 kfree(data);
1738 return -ENODEV;
1739 }
1740
1741 mutex_lock(&video->device_list_lock);
1742 list_add_tail(&data->entry, &video->video_device_list);
1743 mutex_unlock(&video->device_list_lock);
1744
1745 acpi_video_device_add_fs(device);
1746
1747 return 0;
1748 }
1749
1750 return -ENOENT;
1751 }
1752
1753 /*
1754 * Arg:
1755 * video : video bus device
1756 *
1757 * Return:
1758 * none
1759 *
1760 * Enumerate the video device list of the video bus,
1761 * bind the ids with the corresponding video devices
1762 * under the video bus.
1763 */
1764
1765 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1766 {
1767 struct acpi_video_device *dev;
1768
1769 mutex_lock(&video->device_list_lock);
1770
1771 list_for_each_entry(dev, &video->video_device_list, entry)
1772 acpi_video_device_bind(video, dev);
1773
1774 mutex_unlock(&video->device_list_lock);
1775 }
1776
1777 /*
1778 * Arg:
1779 * video : video bus device
1780 * device : video output device under the video
1781 * bus
1782 *
1783 * Return:
1784 * none
1785 *
1786 * Bind the ids with the corresponding video devices
1787 * under the video bus.
1788 */
1789
1790 static void
1791 acpi_video_device_bind(struct acpi_video_bus *video,
1792 struct acpi_video_device *device)
1793 {
1794 struct acpi_video_enumerated_device *ids;
1795 int i;
1796
1797 for (i = 0; i < video->attached_count; i++) {
1798 ids = &video->attached_array[i];
1799 if (device->device_id == (ids->value.int_val & 0xffff)) {
1800 ids->bind_info = device;
1801 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1802 }
1803 }
1804 }
1805
1806 /*
1807 * Arg:
1808 * video : video bus device
1809 *
1810 * Return:
1811 * < 0 : error
1812 *
1813 * Call _DOD to enumerate all devices attached to display adapter
1814 *
1815 */
1816
1817 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1818 {
1819 int status;
1820 int count;
1821 int i;
1822 struct acpi_video_enumerated_device *active_list;
1823 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1824 union acpi_object *dod = NULL;
1825 union acpi_object *obj;
1826
1827 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1828 if (!ACPI_SUCCESS(status)) {
1829 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1830 return status;
1831 }
1832
1833 dod = buffer.pointer;
1834 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1835 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1836 status = -EFAULT;
1837 goto out;
1838 }
1839
1840 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1841 dod->package.count));
1842
1843 active_list = kcalloc(1 + dod->package.count,
1844 sizeof(struct acpi_video_enumerated_device),
1845 GFP_KERNEL);
1846 if (!active_list) {
1847 status = -ENOMEM;
1848 goto out;
1849 }
1850
1851 count = 0;
1852 for (i = 0; i < dod->package.count; i++) {
1853 obj = &dod->package.elements[i];
1854
1855 if (obj->type != ACPI_TYPE_INTEGER) {
1856 printk(KERN_ERR PREFIX
1857 "Invalid _DOD data in element %d\n", i);
1858 continue;
1859 }
1860
1861 active_list[count].value.int_val = obj->integer.value;
1862 active_list[count].bind_info = NULL;
1863 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1864 (int)obj->integer.value));
1865 count++;
1866 }
1867
1868 kfree(video->attached_array);
1869
1870 video->attached_array = active_list;
1871 video->attached_count = count;
1872
1873 out:
1874 kfree(buffer.pointer);
1875 return status;
1876 }
1877
1878 static int
1879 acpi_video_get_next_level(struct acpi_video_device *device,
1880 u32 level_current, u32 event)
1881 {
1882 int min, max, min_above, max_below, i, l, delta = 255;
1883 max = max_below = 0;
1884 min = min_above = 255;
1885 /* Find closest level to level_current */
1886 for (i = 2; i < device->brightness->count; i++) {
1887 l = device->brightness->levels[i];
1888 if (abs(l - level_current) < abs(delta)) {
1889 delta = l - level_current;
1890 if (!delta)
1891 break;
1892 }
1893 }
1894 /* Ajust level_current to closest available level */
1895 level_current += delta;
1896 for (i = 2; i < device->brightness->count; i++) {
1897 l = device->brightness->levels[i];
1898 if (l < min)
1899 min = l;
1900 if (l > max)
1901 max = l;
1902 if (l < min_above && l > level_current)
1903 min_above = l;
1904 if (l > max_below && l < level_current)
1905 max_below = l;
1906 }
1907
1908 switch (event) {
1909 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1910 return (level_current < max) ? min_above : min;
1911 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1912 return (level_current < max) ? min_above : max;
1913 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1914 return (level_current > min) ? max_below : min;
1915 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1916 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1917 return 0;
1918 default:
1919 return level_current;
1920 }
1921 }
1922
1923 static int
1924 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1925 {
1926 unsigned long long level_current, level_next;
1927 int result = -EINVAL;
1928
1929 if (!device->brightness)
1930 goto out;
1931
1932 result = acpi_video_device_lcd_get_level_current(device,
1933 &level_current);
1934 if (result)
1935 goto out;
1936
1937 level_next = acpi_video_get_next_level(device, level_current, event);
1938
1939 result = acpi_video_device_lcd_set_level(device, level_next);
1940
1941 out:
1942 if (result)
1943 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1944
1945 return result;
1946 }
1947
1948 static int
1949 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1950 struct acpi_device *device)
1951 {
1952 int status = 0;
1953 struct acpi_device *dev;
1954
1955 acpi_video_device_enumerate(video);
1956
1957 list_for_each_entry(dev, &device->children, node) {
1958
1959 status = acpi_video_bus_get_one_device(dev, video);
1960 if (ACPI_FAILURE(status)) {
1961 printk(KERN_WARNING PREFIX
1962 "Cant attach device");
1963 continue;
1964 }
1965 }
1966 return status;
1967 }
1968
1969 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1970 {
1971 acpi_status status;
1972 struct acpi_video_bus *video;
1973
1974
1975 if (!device || !device->video)
1976 return -ENOENT;
1977
1978 video = device->video;
1979
1980 acpi_video_device_remove_fs(device->dev);
1981
1982 status = acpi_remove_notify_handler(device->dev->handle,
1983 ACPI_DEVICE_NOTIFY,
1984 acpi_video_device_notify);
1985 backlight_device_unregister(device->backlight);
1986 if (device->cdev) {
1987 sysfs_remove_link(&device->dev->dev.kobj,
1988 "thermal_cooling");
1989 sysfs_remove_link(&device->cdev->device.kobj,
1990 "device");
1991 thermal_cooling_device_unregister(device->cdev);
1992 device->cdev = NULL;
1993 }
1994 video_output_unregister(device->output_dev);
1995
1996 return 0;
1997 }
1998
1999 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
2000 {
2001 int status;
2002 struct acpi_video_device *dev, *next;
2003
2004 mutex_lock(&video->device_list_lock);
2005
2006 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
2007
2008 status = acpi_video_bus_put_one_device(dev);
2009 if (ACPI_FAILURE(status))
2010 printk(KERN_WARNING PREFIX
2011 "hhuuhhuu bug in acpi video driver.\n");
2012
2013 if (dev->brightness) {
2014 kfree(dev->brightness->levels);
2015 kfree(dev->brightness);
2016 }
2017 list_del(&dev->entry);
2018 kfree(dev);
2019 }
2020
2021 mutex_unlock(&video->device_list_lock);
2022
2023 return 0;
2024 }
2025
2026 /* acpi_video interface */
2027
2028 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
2029 {
2030 return acpi_video_bus_DOS(video, 0, 0);
2031 }
2032
2033 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
2034 {
2035 return acpi_video_bus_DOS(video, 0, 1);
2036 }
2037
2038 static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
2039 {
2040 struct acpi_video_bus *video = acpi_driver_data(device);
2041 struct input_dev *input;
2042 int keycode;
2043
2044 if (!video)
2045 return;
2046
2047 input = video->input;
2048
2049 switch (event) {
2050 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
2051 * most likely via hotkey. */
2052 acpi_bus_generate_proc_event(device, event, 0);
2053 keycode = KEY_SWITCHVIDEOMODE;
2054 break;
2055
2056 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
2057 * connector. */
2058 acpi_video_device_enumerate(video);
2059 acpi_video_device_rebind(video);
2060 acpi_bus_generate_proc_event(device, event, 0);
2061 keycode = KEY_SWITCHVIDEOMODE;
2062 break;
2063
2064 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2065 acpi_bus_generate_proc_event(device, event, 0);
2066 keycode = KEY_SWITCHVIDEOMODE;
2067 break;
2068 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2069 acpi_bus_generate_proc_event(device, event, 0);
2070 keycode = KEY_VIDEO_NEXT;
2071 break;
2072 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2073 acpi_bus_generate_proc_event(device, event, 0);
2074 keycode = KEY_VIDEO_PREV;
2075 break;
2076
2077 default:
2078 keycode = KEY_UNKNOWN;
2079 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2080 "Unsupported event [0x%x]\n", event));
2081 break;
2082 }
2083
2084 acpi_notifier_call_chain(device, event, 0);
2085 input_report_key(input, keycode, 1);
2086 input_sync(input);
2087 input_report_key(input, keycode, 0);
2088 input_sync(input);
2089
2090 return;
2091 }
2092
2093 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2094 {
2095 struct acpi_video_device *video_device = data;
2096 struct acpi_device *device = NULL;
2097 struct acpi_video_bus *bus;
2098 struct input_dev *input;
2099 int keycode;
2100
2101 if (!video_device)
2102 return;
2103
2104 device = video_device->dev;
2105 bus = video_device->video;
2106 input = bus->input;
2107
2108 switch (event) {
2109 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
2110 if (brightness_switch_enabled)
2111 acpi_video_switch_brightness(video_device, event);
2112 acpi_bus_generate_proc_event(device, event, 0);
2113 keycode = KEY_BRIGHTNESS_CYCLE;
2114 break;
2115 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
2116 if (brightness_switch_enabled)
2117 acpi_video_switch_brightness(video_device, event);
2118 acpi_bus_generate_proc_event(device, event, 0);
2119 keycode = KEY_BRIGHTNESSUP;
2120 break;
2121 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2122 if (brightness_switch_enabled)
2123 acpi_video_switch_brightness(video_device, event);
2124 acpi_bus_generate_proc_event(device, event, 0);
2125 keycode = KEY_BRIGHTNESSDOWN;
2126 break;
2127 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2128 if (brightness_switch_enabled)
2129 acpi_video_switch_brightness(video_device, event);
2130 acpi_bus_generate_proc_event(device, event, 0);
2131 keycode = KEY_BRIGHTNESS_ZERO;
2132 break;
2133 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2134 if (brightness_switch_enabled)
2135 acpi_video_switch_brightness(video_device, event);
2136 acpi_bus_generate_proc_event(device, event, 0);
2137 keycode = KEY_DISPLAY_OFF;
2138 break;
2139 default:
2140 keycode = KEY_UNKNOWN;
2141 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2142 "Unsupported event [0x%x]\n", event));
2143 break;
2144 }
2145
2146 acpi_notifier_call_chain(device, event, 0);
2147 input_report_key(input, keycode, 1);
2148 input_sync(input);
2149 input_report_key(input, keycode, 0);
2150 input_sync(input);
2151
2152 return;
2153 }
2154
2155 static int instance;
2156 static int acpi_video_resume(struct acpi_device *device)
2157 {
2158 struct acpi_video_bus *video;
2159 struct acpi_video_device *video_device;
2160 int i;
2161
2162 if (!device || !acpi_driver_data(device))
2163 return -EINVAL;
2164
2165 video = acpi_driver_data(device);
2166
2167 for (i = 0; i < video->attached_count; i++) {
2168 video_device = video->attached_array[i].bind_info;
2169 if (video_device && video_device->backlight)
2170 acpi_video_set_brightness(video_device->backlight);
2171 }
2172 return AE_OK;
2173 }
2174
2175 static int acpi_video_bus_add(struct acpi_device *device)
2176 {
2177 struct acpi_video_bus *video;
2178 struct input_dev *input;
2179 int error;
2180
2181 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2182 if (!video)
2183 return -ENOMEM;
2184
2185 /* a hack to fix the duplicate name "VID" problem on T61 */
2186 if (!strcmp(device->pnp.bus_id, "VID")) {
2187 if (instance)
2188 device->pnp.bus_id[3] = '0' + instance;
2189 instance ++;
2190 }
2191 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2192 if (!strcmp(device->pnp.bus_id, "VGA")) {
2193 if (instance)
2194 device->pnp.bus_id[3] = '0' + instance;
2195 instance++;
2196 }
2197
2198 video->device = device;
2199 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2200 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2201 device->driver_data = video;
2202
2203 acpi_video_bus_find_cap(video);
2204 error = acpi_video_bus_check(video);
2205 if (error)
2206 goto err_free_video;
2207
2208 error = acpi_video_bus_add_fs(device);
2209 if (error)
2210 goto err_free_video;
2211
2212 mutex_init(&video->device_list_lock);
2213 INIT_LIST_HEAD(&video->video_device_list);
2214
2215 acpi_video_bus_get_devices(video, device);
2216 acpi_video_bus_start_devices(video);
2217
2218 video->input = input = input_allocate_device();
2219 if (!input) {
2220 error = -ENOMEM;
2221 goto err_stop_video;
2222 }
2223
2224 snprintf(video->phys, sizeof(video->phys),
2225 "%s/video/input0", acpi_device_hid(video->device));
2226
2227 input->name = acpi_device_name(video->device);
2228 input->phys = video->phys;
2229 input->id.bustype = BUS_HOST;
2230 input->id.product = 0x06;
2231 input->dev.parent = &device->dev;
2232 input->evbit[0] = BIT(EV_KEY);
2233 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2234 set_bit(KEY_VIDEO_NEXT, input->keybit);
2235 set_bit(KEY_VIDEO_PREV, input->keybit);
2236 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2237 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2238 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2239 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2240 set_bit(KEY_DISPLAY_OFF, input->keybit);
2241 set_bit(KEY_UNKNOWN, input->keybit);
2242
2243 error = input_register_device(input);
2244 if (error)
2245 goto err_free_input_dev;
2246
2247 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2248 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2249 video->flags.multihead ? "yes" : "no",
2250 video->flags.rom ? "yes" : "no",
2251 video->flags.post ? "yes" : "no");
2252
2253 return 0;
2254
2255 err_free_input_dev:
2256 input_free_device(input);
2257 err_stop_video:
2258 acpi_video_bus_stop_devices(video);
2259 acpi_video_bus_put_devices(video);
2260 kfree(video->attached_array);
2261 acpi_video_bus_remove_fs(device);
2262 err_free_video:
2263 kfree(video);
2264 device->driver_data = NULL;
2265
2266 return error;
2267 }
2268
2269 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2270 {
2271 struct acpi_video_bus *video = NULL;
2272
2273
2274 if (!device || !acpi_driver_data(device))
2275 return -EINVAL;
2276
2277 video = acpi_driver_data(device);
2278
2279 acpi_video_bus_stop_devices(video);
2280 acpi_video_bus_put_devices(video);
2281 acpi_video_bus_remove_fs(device);
2282
2283 input_unregister_device(video->input);
2284 kfree(video->attached_array);
2285 kfree(video);
2286
2287 return 0;
2288 }
2289
2290 static int __init intel_opregion_present(void)
2291 {
2292 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2293 struct pci_dev *dev = NULL;
2294 u32 address;
2295
2296 for_each_pci_dev(dev) {
2297 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2298 continue;
2299 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2300 continue;
2301 pci_read_config_dword(dev, 0xfc, &address);
2302 if (!address)
2303 continue;
2304 return 1;
2305 }
2306 #endif
2307 return 0;
2308 }
2309
2310 int acpi_video_register(void)
2311 {
2312 int result = 0;
2313
2314 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2315 if (!acpi_video_dir)
2316 return -ENODEV;
2317
2318 result = acpi_bus_register_driver(&acpi_video_bus);
2319 if (result < 0) {
2320 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2321 return -ENODEV;
2322 }
2323
2324 return 0;
2325 }
2326 EXPORT_SYMBOL(acpi_video_register);
2327
2328 /*
2329 * This is kind of nasty. Hardware using Intel chipsets may require
2330 * the video opregion code to be run first in order to initialise
2331 * state before any ACPI video calls are made. To handle this we defer
2332 * registration of the video class until the opregion code has run.
2333 */
2334
2335 static int __init acpi_video_init(void)
2336 {
2337 dmi_check_system(video_dmi_table);
2338
2339 if (intel_opregion_present())
2340 return 0;
2341
2342 return acpi_video_register();
2343 }
2344
2345 void __exit acpi_video_exit(void)
2346 {
2347
2348 acpi_bus_unregister_driver(&acpi_video_bus);
2349
2350 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2351
2352 return;
2353 }
2354 EXPORT_SYMBOL(acpi_video_exit);
2355
2356 module_init(acpi_video_init);
2357 module_exit(acpi_video_exit);
Linux kernel - Deliverables
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