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