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pcmcia/cm4000: fix lock imbalance
[linux-2.6/mini2440.git] / drivers / acpi / video.c
blob1bdfb37377e32d58bcd1f3e35e858c1cc681aa5c
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <linux/sort.h>
40 #include <linux/pci.h>
41 #include <linux/pci_ids.h>
42 #include <asm/uaccess.h>
43
44 #include <acpi/acpi_bus.h>
45 #include <acpi/acpi_drivers.h>
46
47 #define ACPI_VIDEO_CLASS "video"
48 #define ACPI_VIDEO_BUS_NAME "Video Bus"
49 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
50 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
51 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
52 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
53 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
54 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
55
56 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
57 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
58 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
59 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
60 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
61
62 #define MAX_NAME_LEN 20
63
64 #define ACPI_VIDEO_DISPLAY_CRT 1
65 #define ACPI_VIDEO_DISPLAY_TV 2
66 #define ACPI_VIDEO_DISPLAY_DVI 3
67 #define ACPI_VIDEO_DISPLAY_LCD 4
68
69 #define _COMPONENT ACPI_VIDEO_COMPONENT
70 ACPI_MODULE_NAME("video");
71
72 MODULE_AUTHOR("Bruno Ducrot");
73 MODULE_DESCRIPTION("ACPI Video Driver");
74 MODULE_LICENSE("GPL");
75
76 static int brightness_switch_enabled = 1;
77 module_param(brightness_switch_enabled, bool, 0644);
78
79 static int acpi_video_bus_add(struct acpi_device *device);
80 static int acpi_video_bus_remove(struct acpi_device *device, int type);
81 static int acpi_video_resume(struct acpi_device *device);
82 static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
83
84 static const struct acpi_device_id video_device_ids[] = {
85 {ACPI_VIDEO_HID, 0},
86 {"", 0},
87 };
88 MODULE_DEVICE_TABLE(acpi, video_device_ids);
89
90 static struct acpi_driver acpi_video_bus = {
91 .name = "video",
92 .class = ACPI_VIDEO_CLASS,
93 .ids = video_device_ids,
94 .ops = {
95 .add = acpi_video_bus_add,
96 .remove = acpi_video_bus_remove,
97 .resume = acpi_video_resume,
98 .notify = acpi_video_bus_notify,
99 },
100 };
101
102 struct acpi_video_bus_flags {
103 u8 multihead:1; /* can switch video heads */
104 u8 rom:1; /* can retrieve a video rom */
105 u8 post:1; /* can configure the head to */
106 u8 reserved:5;
107 };
108
109 struct acpi_video_bus_cap {
110 u8 _DOS:1; /*Enable/Disable output switching */
111 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
112 u8 _ROM:1; /*Get ROM Data */
113 u8 _GPD:1; /*Get POST Device */
114 u8 _SPD:1; /*Set POST Device */
115 u8 _VPO:1; /*Video POST Options */
116 u8 reserved:2;
117 };
118
119 struct acpi_video_device_attrib {
120 u32 display_index:4; /* A zero-based instance of the Display */
121 u32 display_port_attachment:4; /*This field differentiates the display type */
122 u32 display_type:4; /*Describe the specific type in use */
123 u32 vendor_specific:4; /*Chipset Vendor Specific */
124 u32 bios_can_detect:1; /*BIOS can detect the device */
125 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
126 the VGA device. */
127 u32 pipe_id:3; /*For VGA multiple-head devices. */
128 u32 reserved:10; /*Must be 0 */
129 u32 device_id_scheme:1; /*Device ID Scheme */
130 };
131
132 struct acpi_video_enumerated_device {
133 union {
134 u32 int_val;
135 struct acpi_video_device_attrib attrib;
136 } value;
137 struct acpi_video_device *bind_info;
138 };
139
140 struct acpi_video_bus {
141 struct acpi_device *device;
142 u8 dos_setting;
143 struct acpi_video_enumerated_device *attached_array;
144 u8 attached_count;
145 struct acpi_video_bus_cap cap;
146 struct acpi_video_bus_flags flags;
147 struct list_head video_device_list;
148 struct mutex device_list_lock; /* protects video_device_list */
149 struct proc_dir_entry *dir;
150 struct input_dev *input;
151 char phys[32]; /* for input device */
152 };
153
154 struct acpi_video_device_flags {
155 u8 crt:1;
156 u8 lcd:1;
157 u8 tvout:1;
158 u8 dvi:1;
159 u8 bios:1;
160 u8 unknown:1;
161 u8 reserved:2;
162 };
163
164 struct acpi_video_device_cap {
165 u8 _ADR:1; /*Return the unique ID */
166 u8 _BCL:1; /*Query list of brightness control levels supported */
167 u8 _BCM:1; /*Set the brightness level */
168 u8 _BQC:1; /* Get current brightness level */
169 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
170 u8 _DDC:1; /*Return the EDID for this device */
171 u8 _DCS:1; /*Return status of output device */
172 u8 _DGS:1; /*Query graphics state */
173 u8 _DSS:1; /*Device state set */
174 };
175
176 struct acpi_video_brightness_flags {
177 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
178 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
179 u8 _BCL_use_index:1; /* levels in _BCL are index values */
180 u8 _BCM_use_index:1; /* input of _BCM is an index value */
181 u8 _BQC_use_index:1; /* _BQC returns an index value */
182 };
183
184 struct acpi_video_device_brightness {
185 int curr;
186 int count;
187 int *levels;
188 struct acpi_video_brightness_flags flags;
189 };
190
191 struct acpi_video_device {
192 unsigned long device_id;
193 struct acpi_video_device_flags flags;
194 struct acpi_video_device_cap cap;
195 struct list_head entry;
196 struct acpi_video_bus *video;
197 struct acpi_device *dev;
198 struct acpi_video_device_brightness *brightness;
199 struct backlight_device *backlight;
200 struct thermal_cooling_device *cdev;
201 struct output_device *output_dev;
202 };
203
204 /* bus */
205 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
206 static const struct file_operations acpi_video_bus_info_fops = {
207 .owner = THIS_MODULE,
208 .open = acpi_video_bus_info_open_fs,
209 .read = seq_read,
210 .llseek = seq_lseek,
211 .release = single_release,
212 };
213
214 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
215 static const struct file_operations acpi_video_bus_ROM_fops = {
216 .owner = THIS_MODULE,
217 .open = acpi_video_bus_ROM_open_fs,
218 .read = seq_read,
219 .llseek = seq_lseek,
220 .release = single_release,
221 };
222
223 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
224 struct file *file);
225 static const struct file_operations acpi_video_bus_POST_info_fops = {
226 .owner = THIS_MODULE,
227 .open = acpi_video_bus_POST_info_open_fs,
228 .read = seq_read,
229 .llseek = seq_lseek,
230 .release = single_release,
231 };
232
233 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
234 static ssize_t acpi_video_bus_write_POST(struct file *file,
235 const char __user *buffer, size_t count, loff_t *data);
236 static const struct file_operations acpi_video_bus_POST_fops = {
237 .owner = THIS_MODULE,
238 .open = acpi_video_bus_POST_open_fs,
239 .read = seq_read,
240 .write = acpi_video_bus_write_POST,
241 .llseek = seq_lseek,
242 .release = single_release,
243 };
244
245 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
246 static ssize_t acpi_video_bus_write_DOS(struct file *file,
247 const char __user *buffer, size_t count, loff_t *data);
248 static const struct file_operations acpi_video_bus_DOS_fops = {
249 .owner = THIS_MODULE,
250 .open = acpi_video_bus_DOS_open_fs,
251 .read = seq_read,
252 .write = acpi_video_bus_write_DOS,
253 .llseek = seq_lseek,
254 .release = single_release,
255 };
256
257 /* device */
258 static int acpi_video_device_info_open_fs(struct inode *inode,
259 struct file *file);
260 static const struct file_operations acpi_video_device_info_fops = {
261 .owner = THIS_MODULE,
262 .open = acpi_video_device_info_open_fs,
263 .read = seq_read,
264 .llseek = seq_lseek,
265 .release = single_release,
266 };
267
268 static int acpi_video_device_state_open_fs(struct inode *inode,
269 struct file *file);
270 static ssize_t acpi_video_device_write_state(struct file *file,
271 const char __user *buffer, size_t count, loff_t *data);
272 static const struct file_operations acpi_video_device_state_fops = {
273 .owner = THIS_MODULE,
274 .open = acpi_video_device_state_open_fs,
275 .read = seq_read,
276 .write = acpi_video_device_write_state,
277 .llseek = seq_lseek,
278 .release = single_release,
279 };
280
281 static int acpi_video_device_brightness_open_fs(struct inode *inode,
282 struct file *file);
283 static ssize_t acpi_video_device_write_brightness(struct file *file,
284 const char __user *buffer, size_t count, loff_t *data);
285 static struct file_operations acpi_video_device_brightness_fops = {
286 .owner = THIS_MODULE,
287 .open = acpi_video_device_brightness_open_fs,
288 .read = seq_read,
289 .write = acpi_video_device_write_brightness,
290 .llseek = seq_lseek,
291 .release = single_release,
292 };
293
294 static int acpi_video_device_EDID_open_fs(struct inode *inode,
295 struct file *file);
296 static const struct file_operations acpi_video_device_EDID_fops = {
297 .owner = THIS_MODULE,
298 .open = acpi_video_device_EDID_open_fs,
299 .read = seq_read,
300 .llseek = seq_lseek,
301 .release = single_release,
302 };
303
304 static const char device_decode[][30] = {
305 "motherboard VGA device",
306 "PCI VGA device",
307 "AGP VGA device",
308 "UNKNOWN",
309 };
310
311 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
312 static void acpi_video_device_rebind(struct acpi_video_bus *video);
313 static void acpi_video_device_bind(struct acpi_video_bus *video,
314 struct acpi_video_device *device);
315 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
316 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
317 int level);
318 static int acpi_video_device_lcd_get_level_current(
319 struct acpi_video_device *device,
320 unsigned long long *level);
321 static int acpi_video_get_next_level(struct acpi_video_device *device,
322 u32 level_current, u32 event);
323 static int acpi_video_switch_brightness(struct acpi_video_device *device,
324 int event);
325 static int acpi_video_device_get_state(struct acpi_video_device *device,
326 unsigned long long *state);
327 static int acpi_video_output_get(struct output_device *od);
328 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
329
330 /*backlight device sysfs support*/
331 static int acpi_video_get_brightness(struct backlight_device *bd)
332 {
333 unsigned long long cur_level;
334 int i;
335 struct acpi_video_device *vd =
336 (struct acpi_video_device *)bl_get_data(bd);
337
338 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
339 return -EINVAL;
340 for (i = 2; i < vd->brightness->count; i++) {
341 if (vd->brightness->levels[i] == cur_level)
342 /* The first two entries are special - see page 575
343 of the ACPI spec 3.0 */
344 return i-2;
345 }
346 return 0;
347 }
348
349 static int acpi_video_set_brightness(struct backlight_device *bd)
350 {
351 int request_level = bd->props.brightness + 2;
352 struct acpi_video_device *vd =
353 (struct acpi_video_device *)bl_get_data(bd);
354
355 return acpi_video_device_lcd_set_level(vd,
356 vd->brightness->levels[request_level]);
357 }
358
359 static struct backlight_ops acpi_backlight_ops = {
360 .get_brightness = acpi_video_get_brightness,
361 .update_status = acpi_video_set_brightness,
362 };
363
364 /*video output device sysfs support*/
365 static int acpi_video_output_get(struct output_device *od)
366 {
367 unsigned long long state;
368 struct acpi_video_device *vd =
369 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
370 acpi_video_device_get_state(vd, &state);
371 return (int)state;
372 }
373
374 static int acpi_video_output_set(struct output_device *od)
375 {
376 unsigned long state = od->request_state;
377 struct acpi_video_device *vd=
378 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
379 return acpi_video_device_set_state(vd, state);
380 }
381
382 static struct output_properties acpi_output_properties = {
383 .set_state = acpi_video_output_set,
384 .get_status = acpi_video_output_get,
385 };
386
387
388 /* thermal cooling device callbacks */
389 static int video_get_max_state(struct thermal_cooling_device *cdev, unsigned
390 long *state)
391 {
392 struct acpi_device *device = cdev->devdata;
393 struct acpi_video_device *video = acpi_driver_data(device);
394
395 *state = video->brightness->count - 3;
396 return 0;
397 }
398
399 static int video_get_cur_state(struct thermal_cooling_device *cdev, unsigned
400 long *state)
401 {
402 struct acpi_device *device = cdev->devdata;
403 struct acpi_video_device *video = acpi_driver_data(device);
404 unsigned long long level;
405 int offset;
406
407 if (acpi_video_device_lcd_get_level_current(video, &level))
408 return -EINVAL;
409 for (offset = 2; offset < video->brightness->count; offset++)
410 if (level == video->brightness->levels[offset]) {
411 *state = video->brightness->count - offset - 1;
412 return 0;
413 }
414
415 return -EINVAL;
416 }
417
418 static int
419 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
420 {
421 struct acpi_device *device = cdev->devdata;
422 struct acpi_video_device *video = acpi_driver_data(device);
423 int level;
424
425 if ( state >= video->brightness->count - 2)
426 return -EINVAL;
427
428 state = video->brightness->count - state;
429 level = video->brightness->levels[state -1];
430 return acpi_video_device_lcd_set_level(video, level);
431 }
432
433 static struct thermal_cooling_device_ops video_cooling_ops = {
434 .get_max_state = video_get_max_state,
435 .get_cur_state = video_get_cur_state,
436 .set_cur_state = video_set_cur_state,
437 };
438
439 /* --------------------------------------------------------------------------
440 Video Management
441 -------------------------------------------------------------------------- */
442
443 /* device */
444
445 static int
446 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
447 {
448 int status;
449
450 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
451
452 return status;
453 }
454
455 static int
456 acpi_video_device_get_state(struct acpi_video_device *device,
457 unsigned long long *state)
458 {
459 int status;
460
461 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
462
463 return status;
464 }
465
466 static int
467 acpi_video_device_set_state(struct acpi_video_device *device, int state)
468 {
469 int status;
470 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
471 struct acpi_object_list args = { 1, &arg0 };
472 unsigned long long ret;
473
474
475 arg0.integer.value = state;
476 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
477
478 return status;
479 }
480
481 static int
482 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
483 union acpi_object **levels)
484 {
485 int status;
486 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
487 union acpi_object *obj;
488
489
490 *levels = NULL;
491
492 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
493 if (!ACPI_SUCCESS(status))
494 return status;
495 obj = (union acpi_object *)buffer.pointer;
496 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
497 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
498 status = -EFAULT;
499 goto err;
500 }
501
502 *levels = obj;
503
504 return 0;
505
506 err:
507 kfree(buffer.pointer);
508
509 return status;
510 }
511
512 static int
513 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
514 {
515 int status;
516 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
517 struct acpi_object_list args = { 1, &arg0 };
518 int state;
519
520 arg0.integer.value = level;
521
522 status = acpi_evaluate_object(device->dev->handle, "_BCM",
523 &args, NULL);
524 if (ACPI_FAILURE(status)) {
525 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
526 return -EIO;
527 }
528
529 device->brightness->curr = level;
530 for (state = 2; state < device->brightness->count; state++)
531 if (level == device->brightness->levels[state]) {
532 if (device->backlight)
533 device->backlight->props.brightness = state - 2;
534 return 0;
535 }
536
537 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
538 return -EINVAL;
539 }
540
541 /*
542 * For some buggy _BQC methods, we need to add a constant value to
543 * the _BQC return value to get the actual current brightness level
544 */
545
546 static int bqc_offset_aml_bug_workaround;
547 static int __init video_set_bqc_offset(const struct dmi_system_id *d)
548 {
549 bqc_offset_aml_bug_workaround = 9;
550 return 0;
551 }
552
553 static struct dmi_system_id video_dmi_table[] __initdata = {
554 /*
555 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
556 */
557 {
558 .callback = video_set_bqc_offset,
559 .ident = "Acer Aspire 5720",
560 .matches = {
561 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
562 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
563 },
564 },
565 {
566 .callback = video_set_bqc_offset,
567 .ident = "Acer Aspire 5710Z",
568 .matches = {
569 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
570 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
571 },
572 },
573 {
574 .callback = video_set_bqc_offset,
575 .ident = "eMachines E510",
576 .matches = {
577 DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
578 DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
579 },
580 },
581 {
582 .callback = video_set_bqc_offset,
583 .ident = "Acer Aspire 5315",
584 .matches = {
585 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
586 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
587 },
588 },
589 {}
590 };
591
592 static int
593 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
594 unsigned long long *level)
595 {
596 acpi_status status = AE_OK;
597
598 if (device->cap._BQC || device->cap._BCQ) {
599 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
600
601 status = acpi_evaluate_integer(device->dev->handle, buf,
602 NULL, level);
603 if (ACPI_SUCCESS(status)) {
604 if (device->brightness->flags._BQC_use_index) {
605 if (device->brightness->flags._BCL_reversed)
606 *level = device->brightness->count
607 - 3 - (*level);
608 *level = device->brightness->levels[*level + 2];
609
610 }
611 *level += bqc_offset_aml_bug_workaround;
612 device->brightness->curr = *level;
613 return 0;
614 } else {
615 /* Fixme:
616 * should we return an error or ignore this failure?
617 * dev->brightness->curr is a cached value which stores
618 * the correct current backlight level in most cases.
619 * ACPI video backlight still works w/ buggy _BQC.
620 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
621 */
622 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
623 device->cap._BQC = device->cap._BCQ = 0;
624 }
625 }
626
627 *level = device->brightness->curr;
628 return 0;
629 }
630
631 static int
632 acpi_video_device_EDID(struct acpi_video_device *device,
633 union acpi_object **edid, ssize_t length)
634 {
635 int status;
636 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
637 union acpi_object *obj;
638 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
639 struct acpi_object_list args = { 1, &arg0 };
640
641
642 *edid = NULL;
643
644 if (!device)
645 return -ENODEV;
646 if (length == 128)
647 arg0.integer.value = 1;
648 else if (length == 256)
649 arg0.integer.value = 2;
650 else
651 return -EINVAL;
652
653 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
654 if (ACPI_FAILURE(status))
655 return -ENODEV;
656
657 obj = buffer.pointer;
658
659 if (obj && obj->type == ACPI_TYPE_BUFFER)
660 *edid = obj;
661 else {
662 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
663 status = -EFAULT;
664 kfree(obj);
665 }
666
667 return status;
668 }
669
670 /* bus */
671
672 static int
673 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
674 {
675 int status;
676 unsigned long long tmp;
677 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
678 struct acpi_object_list args = { 1, &arg0 };
679
680
681 arg0.integer.value = option;
682
683 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
684 if (ACPI_SUCCESS(status))
685 status = tmp ? (-EINVAL) : (AE_OK);
686
687 return status;
688 }
689
690 static int
691 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
692 {
693 int status;
694
695 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
696
697 return status;
698 }
699
700 static int
701 acpi_video_bus_POST_options(struct acpi_video_bus *video,
702 unsigned long long *options)
703 {
704 int status;
705
706 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
707 *options &= 3;
708
709 return status;
710 }
711
712 /*
713 * Arg:
714 * video : video bus device pointer
715 * bios_flag :
716 * 0. The system BIOS should NOT automatically switch(toggle)
717 * the active display output.
718 * 1. The system BIOS should automatically switch (toggle) the
719 * active display output. No switch event.
720 * 2. The _DGS value should be locked.
721 * 3. The system BIOS should not automatically switch (toggle) the
722 * active display output, but instead generate the display switch
723 * event notify code.
724 * lcd_flag :
725 * 0. The system BIOS should automatically control the brightness level
726 * of the LCD when the power changes from AC to DC
727 * 1. The system BIOS should NOT automatically control the brightness
728 * level of the LCD when the power changes from AC to DC.
729 * Return Value:
730 * -1 wrong arg.
731 */
732
733 static int
734 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
735 {
736 acpi_integer status = 0;
737 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
738 struct acpi_object_list args = { 1, &arg0 };
739
740
741 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
742 status = -1;
743 goto Failed;
744 }
745 arg0.integer.value = (lcd_flag << 2) | bios_flag;
746 video->dos_setting = arg0.integer.value;
747 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
748
749 Failed:
750 return status;
751 }
752
753 /*
754 * Simple comparison function used to sort backlight levels.
755 */
756
757 static int
758 acpi_video_cmp_level(const void *a, const void *b)
759 {
760 return *(int *)a - *(int *)b;
761 }
762
763 /*
764 * Arg:
765 * device : video output device (LCD, CRT, ..)
766 *
767 * Return Value:
768 * Maximum brightness level
769 *
770 * Allocate and initialize device->brightness.
771 */
772
773 static int
774 acpi_video_init_brightness(struct acpi_video_device *device)
775 {
776 union acpi_object *obj = NULL;
777 int i, max_level = 0, count = 0, level_ac_battery = 0;
778 unsigned long long level, level_old;
779 union acpi_object *o;
780 struct acpi_video_device_brightness *br = NULL;
781 int result = -EINVAL;
782
783 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
784 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
785 "LCD brightness level\n"));
786 goto out;
787 }
788
789 if (obj->package.count < 2)
790 goto out;
791
792 br = kzalloc(sizeof(*br), GFP_KERNEL);
793 if (!br) {
794 printk(KERN_ERR "can't allocate memory\n");
795 result = -ENOMEM;
796 goto out;
797 }
798
799 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
800 GFP_KERNEL);
801 if (!br->levels) {
802 result = -ENOMEM;
803 goto out_free;
804 }
805
806 for (i = 0; i < obj->package.count; i++) {
807 o = (union acpi_object *)&obj->package.elements[i];
808 if (o->type != ACPI_TYPE_INTEGER) {
809 printk(KERN_ERR PREFIX "Invalid data\n");
810 continue;
811 }
812 br->levels[count] = (u32) o->integer.value;
813
814 if (br->levels[count] > max_level)
815 max_level = br->levels[count];
816 count++;
817 }
818
819 /*
820 * some buggy BIOS don't export the levels
821 * when machine is on AC/Battery in _BCL package.
822 * In this case, the first two elements in _BCL packages
823 * are also supported brightness levels that OS should take care of.
824 */
825 for (i = 2; i < count; i++) {
826 if (br->levels[i] == br->levels[0])
827 level_ac_battery++;
828 if (br->levels[i] == br->levels[1])
829 level_ac_battery++;
830 }
831
832 if (level_ac_battery < 2) {
833 level_ac_battery = 2 - level_ac_battery;
834 br->flags._BCL_no_ac_battery_levels = 1;
835 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
836 br->levels[i] = br->levels[i - level_ac_battery];
837 count += level_ac_battery;
838 } else if (level_ac_battery > 2)
839 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
840
841 /* Check if the _BCL package is in a reversed order */
842 if (max_level == br->levels[2]) {
843 br->flags._BCL_reversed = 1;
844 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
845 acpi_video_cmp_level, NULL);
846 } else if (max_level != br->levels[count - 1])
847 ACPI_ERROR((AE_INFO,
848 "Found unordered _BCL package\n"));
849
850 br->count = count;
851 device->brightness = br;
852
853 /* Check the input/output of _BQC/_BCL/_BCM */
854 if ((max_level < 100) && (max_level <= (count - 2)))
855 br->flags._BCL_use_index = 1;
856
857 /*
858 * _BCM is always consistent with _BCL,
859 * at least for all the laptops we have ever seen.
860 */
861 br->flags._BCM_use_index = br->flags._BCL_use_index;
862
863 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
864 br->curr = level_old = max_level;
865
866 if (!device->cap._BQC)
867 goto set_level;
868
869 result = acpi_video_device_lcd_get_level_current(device, &level_old);
870 if (result)
871 goto out_free_levels;
872
873 /*
874 * Set the level to maximum and check if _BQC uses indexed value
875 */
876 result = acpi_video_device_lcd_set_level(device, max_level);
877 if (result)
878 goto out_free_levels;
879
880 result = acpi_video_device_lcd_get_level_current(device, &level);
881 if (result)
882 goto out_free_levels;
883
884 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
885
886 if (!br->flags._BQC_use_index)
887 goto set_level;
888
889 if (br->flags._BCL_reversed)
890 level_old = (br->count - 1) - level_old;
891 level_old = br->levels[level_old];
892
893 set_level:
894 result = acpi_video_device_lcd_set_level(device, level_old);
895 if (result)
896 goto out_free_levels;
897
898 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
899 "found %d brightness levels\n", count - 2));
900 kfree(obj);
901 return result;
902
903 out_free_levels:
904 kfree(br->levels);
905 out_free:
906 kfree(br);
907 out:
908 device->brightness = NULL;
909 kfree(obj);
910 return result;
911 }
912
913 /*
914 * Arg:
915 * device : video output device (LCD, CRT, ..)
916 *
917 * Return Value:
918 * None
919 *
920 * Find out all required AML methods defined under the output
921 * device.
922 */
923
924 static void acpi_video_device_find_cap(struct acpi_video_device *device)
925 {
926 acpi_handle h_dummy1;
927
928
929 memset(&device->cap, 0, sizeof(device->cap));
930
931 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
932 device->cap._ADR = 1;
933 }
934 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
935 device->cap._BCL = 1;
936 }
937 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
938 device->cap._BCM = 1;
939 }
940 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
941 device->cap._BQC = 1;
942 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
943 &h_dummy1))) {
944 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
945 device->cap._BCQ = 1;
946 }
947
948 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
949 device->cap._DDC = 1;
950 }
951 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
952 device->cap._DCS = 1;
953 }
954 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
955 device->cap._DGS = 1;
956 }
957 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
958 device->cap._DSS = 1;
959 }
960
961 if (acpi_video_backlight_support()) {
962 int result;
963 static int count = 0;
964 char *name;
965
966 result = acpi_video_init_brightness(device);
967 if (result)
968 return;
969 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
970 if (!name)
971 return;
972
973 sprintf(name, "acpi_video%d", count++);
974 device->backlight = backlight_device_register(name,
975 NULL, device, &acpi_backlight_ops);
976 device->backlight->props.max_brightness = device->brightness->count-3;
977 kfree(name);
978
979 device->cdev = thermal_cooling_device_register("LCD",
980 device->dev, &video_cooling_ops);
981 if (IS_ERR(device->cdev))
982 return;
983
984 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
985 device->cdev->id);
986 result = sysfs_create_link(&device->dev->dev.kobj,
987 &device->cdev->device.kobj,
988 "thermal_cooling");
989 if (result)
990 printk(KERN_ERR PREFIX "Create sysfs link\n");
991 result = sysfs_create_link(&device->cdev->device.kobj,
992 &device->dev->dev.kobj, "device");
993 if (result)
994 printk(KERN_ERR PREFIX "Create sysfs link\n");
995
996 }
997
998 if (acpi_video_display_switch_support()) {
999
1000 if (device->cap._DCS && device->cap._DSS) {
1001 static int count;
1002 char *name;
1003 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
1004 if (!name)
1005 return;
1006 sprintf(name, "acpi_video%d", count++);
1007 device->output_dev = video_output_register(name,
1008 NULL, device, &acpi_output_properties);
1009 kfree(name);
1010 }
1011 }
1012 }
1013
1014 /*
1015 * Arg:
1016 * device : video output device (VGA)
1017 *
1018 * Return Value:
1019 * None
1020 *
1021 * Find out all required AML methods defined under the video bus device.
1022 */
1023
1024 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
1025 {
1026 acpi_handle h_dummy1;
1027
1028 memset(&video->cap, 0, sizeof(video->cap));
1029 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
1030 video->cap._DOS = 1;
1031 }
1032 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
1033 video->cap._DOD = 1;
1034 }
1035 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
1036 video->cap._ROM = 1;
1037 }
1038 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
1039 video->cap._GPD = 1;
1040 }
1041 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
1042 video->cap._SPD = 1;
1043 }
1044 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
1045 video->cap._VPO = 1;
1046 }
1047 }
1048
1049 /*
1050 * Check whether the video bus device has required AML method to
1051 * support the desired features
1052 */
1053
1054 static int acpi_video_bus_check(struct acpi_video_bus *video)
1055 {
1056 acpi_status status = -ENOENT;
1057 struct device *dev;
1058
1059 if (!video)
1060 return -EINVAL;
1061
1062 dev = acpi_get_physical_pci_device(video->device->handle);
1063 if (!dev)
1064 return -ENODEV;
1065 put_device(dev);
1066
1067 /* Since there is no HID, CID and so on for VGA driver, we have
1068 * to check well known required nodes.
1069 */
1070
1071 /* Does this device support video switching? */
1072 if (video->cap._DOS) {
1073 video->flags.multihead = 1;
1074 status = 0;
1075 }
1076
1077 /* Does this device support retrieving a video ROM? */
1078 if (video->cap._ROM) {
1079 video->flags.rom = 1;
1080 status = 0;
1081 }
1082
1083 /* Does this device support configuring which video device to POST? */
1084 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1085 video->flags.post = 1;
1086 status = 0;
1087 }
1088
1089 return status;
1090 }
1091
1092 /* --------------------------------------------------------------------------
1093 FS Interface (/proc)
1094 -------------------------------------------------------------------------- */
1095
1096 static struct proc_dir_entry *acpi_video_dir;
1097
1098 /* video devices */
1099
1100 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1101 {
1102 struct acpi_video_device *dev = seq->private;
1103
1104
1105 if (!dev)
1106 goto end;
1107
1108 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1109 seq_printf(seq, "type: ");
1110 if (dev->flags.crt)
1111 seq_printf(seq, "CRT\n");
1112 else if (dev->flags.lcd)
1113 seq_printf(seq, "LCD\n");
1114 else if (dev->flags.tvout)
1115 seq_printf(seq, "TVOUT\n");
1116 else if (dev->flags.dvi)
1117 seq_printf(seq, "DVI\n");
1118 else
1119 seq_printf(seq, "UNKNOWN\n");
1120
1121 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1122
1123 end:
1124 return 0;
1125 }
1126
1127 static int
1128 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1129 {
1130 return single_open(file, acpi_video_device_info_seq_show,
1131 PDE(inode)->data);
1132 }
1133
1134 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1135 {
1136 int status;
1137 struct acpi_video_device *dev = seq->private;
1138 unsigned long long state;
1139
1140
1141 if (!dev)
1142 goto end;
1143
1144 status = acpi_video_device_get_state(dev, &state);
1145 seq_printf(seq, "state: ");
1146 if (ACPI_SUCCESS(status))
1147 seq_printf(seq, "0x%02llx\n", state);
1148 else
1149 seq_printf(seq, "<not supported>\n");
1150
1151 status = acpi_video_device_query(dev, &state);
1152 seq_printf(seq, "query: ");
1153 if (ACPI_SUCCESS(status))
1154 seq_printf(seq, "0x%02llx\n", state);
1155 else
1156 seq_printf(seq, "<not supported>\n");
1157
1158 end:
1159 return 0;
1160 }
1161
1162 static int
1163 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1164 {
1165 return single_open(file, acpi_video_device_state_seq_show,
1166 PDE(inode)->data);
1167 }
1168
1169 static ssize_t
1170 acpi_video_device_write_state(struct file *file,
1171 const char __user * buffer,
1172 size_t count, loff_t * data)
1173 {
1174 int status;
1175 struct seq_file *m = file->private_data;
1176 struct acpi_video_device *dev = m->private;
1177 char str[12] = { 0 };
1178 u32 state = 0;
1179
1180
1181 if (!dev || count + 1 > sizeof str)
1182 return -EINVAL;
1183
1184 if (copy_from_user(str, buffer, count))
1185 return -EFAULT;
1186
1187 str[count] = 0;
1188 state = simple_strtoul(str, NULL, 0);
1189 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1190
1191 status = acpi_video_device_set_state(dev, state);
1192
1193 if (status)
1194 return -EFAULT;
1195
1196 return count;
1197 }
1198
1199 static int
1200 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1201 {
1202 struct acpi_video_device *dev = seq->private;
1203 int i;
1204
1205
1206 if (!dev || !dev->brightness) {
1207 seq_printf(seq, "<not supported>\n");
1208 return 0;
1209 }
1210
1211 seq_printf(seq, "levels: ");
1212 for (i = 2; i < dev->brightness->count; i++)
1213 seq_printf(seq, " %d", dev->brightness->levels[i]);
1214 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1215
1216 return 0;
1217 }
1218
1219 static int
1220 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1221 {
1222 return single_open(file, acpi_video_device_brightness_seq_show,
1223 PDE(inode)->data);
1224 }
1225
1226 static ssize_t
1227 acpi_video_device_write_brightness(struct file *file,
1228 const char __user * buffer,
1229 size_t count, loff_t * data)
1230 {
1231 struct seq_file *m = file->private_data;
1232 struct acpi_video_device *dev = m->private;
1233 char str[5] = { 0 };
1234 unsigned int level = 0;
1235 int i;
1236
1237
1238 if (!dev || !dev->brightness || count + 1 > sizeof str)
1239 return -EINVAL;
1240
1241 if (copy_from_user(str, buffer, count))
1242 return -EFAULT;
1243
1244 str[count] = 0;
1245 level = simple_strtoul(str, NULL, 0);
1246
1247 if (level > 100)
1248 return -EFAULT;
1249
1250 /* validate through the list of available levels */
1251 for (i = 2; i < dev->brightness->count; i++)
1252 if (level == dev->brightness->levels[i]) {
1253 if (!acpi_video_device_lcd_set_level(dev, level))
1254 return count;
1255 break;
1256 }
1257
1258 return -EINVAL;
1259 }
1260
1261 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1262 {
1263 struct acpi_video_device *dev = seq->private;
1264 int status;
1265 int i;
1266 union acpi_object *edid = NULL;
1267
1268
1269 if (!dev)
1270 goto out;
1271
1272 status = acpi_video_device_EDID(dev, &edid, 128);
1273 if (ACPI_FAILURE(status)) {
1274 status = acpi_video_device_EDID(dev, &edid, 256);
1275 }
1276
1277 if (ACPI_FAILURE(status)) {
1278 goto out;
1279 }
1280
1281 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1282 for (i = 0; i < edid->buffer.length; i++)
1283 seq_putc(seq, edid->buffer.pointer[i]);
1284 }
1285
1286 out:
1287 if (!edid)
1288 seq_printf(seq, "<not supported>\n");
1289 else
1290 kfree(edid);
1291
1292 return 0;
1293 }
1294
1295 static int
1296 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1297 {
1298 return single_open(file, acpi_video_device_EDID_seq_show,
1299 PDE(inode)->data);
1300 }
1301
1302 static int acpi_video_device_add_fs(struct acpi_device *device)
1303 {
1304 struct proc_dir_entry *entry, *device_dir;
1305 struct acpi_video_device *vid_dev;
1306
1307 vid_dev = acpi_driver_data(device);
1308 if (!vid_dev)
1309 return -ENODEV;
1310
1311 device_dir = proc_mkdir(acpi_device_bid(device),
1312 vid_dev->video->dir);
1313 if (!device_dir)
1314 return -ENOMEM;
1315
1316 /* 'info' [R] */
1317 entry = proc_create_data("info", S_IRUGO, device_dir,
1318 &acpi_video_device_info_fops, acpi_driver_data(device));
1319 if (!entry)
1320 goto err_remove_dir;
1321
1322 /* 'state' [R/W] */
1323 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1324 device_dir,
1325 &acpi_video_device_state_fops,
1326 acpi_driver_data(device));
1327 if (!entry)
1328 goto err_remove_info;
1329
1330 /* 'brightness' [R/W] */
1331 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1332 device_dir,
1333 &acpi_video_device_brightness_fops,
1334 acpi_driver_data(device));
1335 if (!entry)
1336 goto err_remove_state;
1337
1338 /* 'EDID' [R] */
1339 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1340 &acpi_video_device_EDID_fops,
1341 acpi_driver_data(device));
1342 if (!entry)
1343 goto err_remove_brightness;
1344
1345 acpi_device_dir(device) = device_dir;
1346
1347 return 0;
1348
1349 err_remove_brightness:
1350 remove_proc_entry("brightness", device_dir);
1351 err_remove_state:
1352 remove_proc_entry("state", device_dir);
1353 err_remove_info:
1354 remove_proc_entry("info", device_dir);
1355 err_remove_dir:
1356 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1357 return -ENOMEM;
1358 }
1359
1360 static int acpi_video_device_remove_fs(struct acpi_device *device)
1361 {
1362 struct acpi_video_device *vid_dev;
1363 struct proc_dir_entry *device_dir;
1364
1365 vid_dev = acpi_driver_data(device);
1366 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1367 return -ENODEV;
1368
1369 device_dir = acpi_device_dir(device);
1370 if (device_dir) {
1371 remove_proc_entry("info", device_dir);
1372 remove_proc_entry("state", device_dir);
1373 remove_proc_entry("brightness", device_dir);
1374 remove_proc_entry("EDID", device_dir);
1375 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1376 acpi_device_dir(device) = NULL;
1377 }
1378
1379 return 0;
1380 }
1381
1382 /* video bus */
1383 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1384 {
1385 struct acpi_video_bus *video = seq->private;
1386
1387
1388 if (!video)
1389 goto end;
1390
1391 seq_printf(seq, "Switching heads: %s\n",
1392 video->flags.multihead ? "yes" : "no");
1393 seq_printf(seq, "Video ROM: %s\n",
1394 video->flags.rom ? "yes" : "no");
1395 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1396 video->flags.post ? "yes" : "no");
1397
1398 end:
1399 return 0;
1400 }
1401
1402 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1403 {
1404 return single_open(file, acpi_video_bus_info_seq_show,
1405 PDE(inode)->data);
1406 }
1407
1408 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1409 {
1410 struct acpi_video_bus *video = seq->private;
1411
1412
1413 if (!video)
1414 goto end;
1415
1416 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1417 seq_printf(seq, "<TODO>\n");
1418
1419 end:
1420 return 0;
1421 }
1422
1423 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1424 {
1425 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1426 }
1427
1428 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1429 {
1430 struct acpi_video_bus *video = seq->private;
1431 unsigned long long options;
1432 int status;
1433
1434
1435 if (!video)
1436 goto end;
1437
1438 status = acpi_video_bus_POST_options(video, &options);
1439 if (ACPI_SUCCESS(status)) {
1440 if (!(options & 1)) {
1441 printk(KERN_WARNING PREFIX
1442 "The motherboard VGA device is not listed as a possible POST device.\n");
1443 printk(KERN_WARNING PREFIX
1444 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1445 }
1446 printk(KERN_WARNING "%llx\n", options);
1447 seq_printf(seq, "can POST: <integrated video>");
1448 if (options & 2)
1449 seq_printf(seq, " <PCI video>");
1450 if (options & 4)
1451 seq_printf(seq, " <AGP video>");
1452 seq_putc(seq, '\n');
1453 } else
1454 seq_printf(seq, "<not supported>\n");
1455 end:
1456 return 0;
1457 }
1458
1459 static int
1460 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1461 {
1462 return single_open(file, acpi_video_bus_POST_info_seq_show,
1463 PDE(inode)->data);
1464 }
1465
1466 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1467 {
1468 struct acpi_video_bus *video = seq->private;
1469 int status;
1470 unsigned long long id;
1471
1472
1473 if (!video)
1474 goto end;
1475
1476 status = acpi_video_bus_get_POST(video, &id);
1477 if (!ACPI_SUCCESS(status)) {
1478 seq_printf(seq, "<not supported>\n");
1479 goto end;
1480 }
1481 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1482
1483 end:
1484 return 0;
1485 }
1486
1487 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1488 {
1489 struct acpi_video_bus *video = seq->private;
1490
1491
1492 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1493
1494 return 0;
1495 }
1496
1497 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1498 {
1499 return single_open(file, acpi_video_bus_POST_seq_show,
1500 PDE(inode)->data);
1501 }
1502
1503 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1504 {
1505 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1506 }
1507
1508 static ssize_t
1509 acpi_video_bus_write_POST(struct file *file,
1510 const char __user * buffer,
1511 size_t count, loff_t * data)
1512 {
1513 int status;
1514 struct seq_file *m = file->private_data;
1515 struct acpi_video_bus *video = m->private;
1516 char str[12] = { 0 };
1517 unsigned long long opt, options;
1518
1519
1520 if (!video || count + 1 > sizeof str)
1521 return -EINVAL;
1522
1523 status = acpi_video_bus_POST_options(video, &options);
1524 if (!ACPI_SUCCESS(status))
1525 return -EINVAL;
1526
1527 if (copy_from_user(str, buffer, count))
1528 return -EFAULT;
1529
1530 str[count] = 0;
1531 opt = strtoul(str, NULL, 0);
1532 if (opt > 3)
1533 return -EFAULT;
1534
1535 /* just in case an OEM 'forgot' the motherboard... */
1536 options |= 1;
1537
1538 if (options & (1ul << opt)) {
1539 status = acpi_video_bus_set_POST(video, opt);
1540 if (!ACPI_SUCCESS(status))
1541 return -EFAULT;
1542
1543 }
1544
1545 return count;
1546 }
1547
1548 static ssize_t
1549 acpi_video_bus_write_DOS(struct file *file,
1550 const char __user * buffer,
1551 size_t count, loff_t * data)
1552 {
1553 int status;
1554 struct seq_file *m = file->private_data;
1555 struct acpi_video_bus *video = m->private;
1556 char str[12] = { 0 };
1557 unsigned long opt;
1558
1559
1560 if (!video || count + 1 > sizeof str)
1561 return -EINVAL;
1562
1563 if (copy_from_user(str, buffer, count))
1564 return -EFAULT;
1565
1566 str[count] = 0;
1567 opt = strtoul(str, NULL, 0);
1568 if (opt > 7)
1569 return -EFAULT;
1570
1571 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1572
1573 if (!ACPI_SUCCESS(status))
1574 return -EFAULT;
1575
1576 return count;
1577 }
1578
1579 static int acpi_video_bus_add_fs(struct acpi_device *device)
1580 {
1581 struct acpi_video_bus *video = acpi_driver_data(device);
1582 struct proc_dir_entry *device_dir;
1583 struct proc_dir_entry *entry;
1584
1585 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1586 if (!device_dir)
1587 return -ENOMEM;
1588
1589 /* 'info' [R] */
1590 entry = proc_create_data("info", S_IRUGO, device_dir,
1591 &acpi_video_bus_info_fops,
1592 acpi_driver_data(device));
1593 if (!entry)
1594 goto err_remove_dir;
1595
1596 /* 'ROM' [R] */
1597 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1598 &acpi_video_bus_ROM_fops,
1599 acpi_driver_data(device));
1600 if (!entry)
1601 goto err_remove_info;
1602
1603 /* 'POST_info' [R] */
1604 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1605 &acpi_video_bus_POST_info_fops,
1606 acpi_driver_data(device));
1607 if (!entry)
1608 goto err_remove_rom;
1609
1610 /* 'POST' [R/W] */
1611 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1612 device_dir,
1613 &acpi_video_bus_POST_fops,
1614 acpi_driver_data(device));
1615 if (!entry)
1616 goto err_remove_post_info;
1617
1618 /* 'DOS' [R/W] */
1619 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1620 device_dir,
1621 &acpi_video_bus_DOS_fops,
1622 acpi_driver_data(device));
1623 if (!entry)
1624 goto err_remove_post;
1625
1626 video->dir = acpi_device_dir(device) = device_dir;
1627 return 0;
1628
1629 err_remove_post:
1630 remove_proc_entry("POST", device_dir);
1631 err_remove_post_info:
1632 remove_proc_entry("POST_info", device_dir);
1633 err_remove_rom:
1634 remove_proc_entry("ROM", device_dir);
1635 err_remove_info:
1636 remove_proc_entry("info", device_dir);
1637 err_remove_dir:
1638 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1639 return -ENOMEM;
1640 }
1641
1642 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1643 {
1644 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1645
1646 if (device_dir) {
1647 remove_proc_entry("info", device_dir);
1648 remove_proc_entry("ROM", device_dir);
1649 remove_proc_entry("POST_info", device_dir);
1650 remove_proc_entry("POST", device_dir);
1651 remove_proc_entry("DOS", device_dir);
1652 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1653 acpi_device_dir(device) = NULL;
1654 }
1655
1656 return 0;
1657 }
1658
1659 /* --------------------------------------------------------------------------
1660 Driver Interface
1661 -------------------------------------------------------------------------- */
1662
1663 /* device interface */
1664 static struct acpi_video_device_attrib*
1665 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1666 {
1667 struct acpi_video_enumerated_device *ids;
1668 int i;
1669
1670 for (i = 0; i < video->attached_count; i++) {
1671 ids = &video->attached_array[i];
1672 if ((ids->value.int_val & 0xffff) == device_id)
1673 return &ids->value.attrib;
1674 }
1675
1676 return NULL;
1677 }
1678
1679 static int
1680 acpi_video_bus_get_one_device(struct acpi_device *device,
1681 struct acpi_video_bus *video)
1682 {
1683 unsigned long long device_id;
1684 int status;
1685 struct acpi_video_device *data;
1686 struct acpi_video_device_attrib* attribute;
1687
1688 if (!device || !video)
1689 return -EINVAL;
1690
1691 status =
1692 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1693 if (ACPI_SUCCESS(status)) {
1694
1695 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1696 if (!data)
1697 return -ENOMEM;
1698
1699 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1700 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1701 device->driver_data = data;
1702
1703 data->device_id = device_id;
1704 data->video = video;
1705 data->dev = device;
1706
1707 attribute = acpi_video_get_device_attr(video, device_id);
1708
1709 if((attribute != NULL) && attribute->device_id_scheme) {
1710 switch (attribute->display_type) {
1711 case ACPI_VIDEO_DISPLAY_CRT:
1712 data->flags.crt = 1;
1713 break;
1714 case ACPI_VIDEO_DISPLAY_TV:
1715 data->flags.tvout = 1;
1716 break;
1717 case ACPI_VIDEO_DISPLAY_DVI:
1718 data->flags.dvi = 1;
1719 break;
1720 case ACPI_VIDEO_DISPLAY_LCD:
1721 data->flags.lcd = 1;
1722 break;
1723 default:
1724 data->flags.unknown = 1;
1725 break;
1726 }
1727 if(attribute->bios_can_detect)
1728 data->flags.bios = 1;
1729 } else
1730 data->flags.unknown = 1;
1731
1732 acpi_video_device_bind(video, data);
1733 acpi_video_device_find_cap(data);
1734
1735 status = acpi_install_notify_handler(device->handle,
1736 ACPI_DEVICE_NOTIFY,
1737 acpi_video_device_notify,
1738 data);
1739 if (ACPI_FAILURE(status)) {
1740 printk(KERN_ERR PREFIX
1741 "Error installing notify handler\n");
1742 if(data->brightness)
1743 kfree(data->brightness->levels);
1744 kfree(data->brightness);
1745 kfree(data);
1746 return -ENODEV;
1747 }
1748
1749 mutex_lock(&video->device_list_lock);
1750 list_add_tail(&data->entry, &video->video_device_list);
1751 mutex_unlock(&video->device_list_lock);
1752
1753 acpi_video_device_add_fs(device);
1754
1755 return 0;
1756 }
1757
1758 return -ENOENT;
1759 }
1760
1761 /*
1762 * Arg:
1763 * video : video bus device
1764 *
1765 * Return:
1766 * none
1767 *
1768 * Enumerate the video device list of the video bus,
1769 * bind the ids with the corresponding video devices
1770 * under the video bus.
1771 */
1772
1773 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1774 {
1775 struct acpi_video_device *dev;
1776
1777 mutex_lock(&video->device_list_lock);
1778
1779 list_for_each_entry(dev, &video->video_device_list, entry)
1780 acpi_video_device_bind(video, dev);
1781
1782 mutex_unlock(&video->device_list_lock);
1783 }
1784
1785 /*
1786 * Arg:
1787 * video : video bus device
1788 * device : video output device under the video
1789 * bus
1790 *
1791 * Return:
1792 * none
1793 *
1794 * Bind the ids with the corresponding video devices
1795 * under the video bus.
1796 */
1797
1798 static void
1799 acpi_video_device_bind(struct acpi_video_bus *video,
1800 struct acpi_video_device *device)
1801 {
1802 struct acpi_video_enumerated_device *ids;
1803 int i;
1804
1805 for (i = 0; i < video->attached_count; i++) {
1806 ids = &video->attached_array[i];
1807 if (device->device_id == (ids->value.int_val & 0xffff)) {
1808 ids->bind_info = device;
1809 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1810 }
1811 }
1812 }
1813
1814 /*
1815 * Arg:
1816 * video : video bus device
1817 *
1818 * Return:
1819 * < 0 : error
1820 *
1821 * Call _DOD to enumerate all devices attached to display adapter
1822 *
1823 */
1824
1825 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1826 {
1827 int status;
1828 int count;
1829 int i;
1830 struct acpi_video_enumerated_device *active_list;
1831 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1832 union acpi_object *dod = NULL;
1833 union acpi_object *obj;
1834
1835 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1836 if (!ACPI_SUCCESS(status)) {
1837 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1838 return status;
1839 }
1840
1841 dod = buffer.pointer;
1842 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1843 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1844 status = -EFAULT;
1845 goto out;
1846 }
1847
1848 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1849 dod->package.count));
1850
1851 active_list = kcalloc(1 + dod->package.count,
1852 sizeof(struct acpi_video_enumerated_device),
1853 GFP_KERNEL);
1854 if (!active_list) {
1855 status = -ENOMEM;
1856 goto out;
1857 }
1858
1859 count = 0;
1860 for (i = 0; i < dod->package.count; i++) {
1861 obj = &dod->package.elements[i];
1862
1863 if (obj->type != ACPI_TYPE_INTEGER) {
1864 printk(KERN_ERR PREFIX
1865 "Invalid _DOD data in element %d\n", i);
1866 continue;
1867 }
1868
1869 active_list[count].value.int_val = obj->integer.value;
1870 active_list[count].bind_info = NULL;
1871 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1872 (int)obj->integer.value));
1873 count++;
1874 }
1875
1876 kfree(video->attached_array);
1877
1878 video->attached_array = active_list;
1879 video->attached_count = count;
1880
1881 out:
1882 kfree(buffer.pointer);
1883 return status;
1884 }
1885
1886 static int
1887 acpi_video_get_next_level(struct acpi_video_device *device,
1888 u32 level_current, u32 event)
1889 {
1890 int min, max, min_above, max_below, i, l, delta = 255;
1891 max = max_below = 0;
1892 min = min_above = 255;
1893 /* Find closest level to level_current */
1894 for (i = 2; i < device->brightness->count; i++) {
1895 l = device->brightness->levels[i];
1896 if (abs(l - level_current) < abs(delta)) {
1897 delta = l - level_current;
1898 if (!delta)
1899 break;
1900 }
1901 }
1902 /* Ajust level_current to closest available level */
1903 level_current += delta;
1904 for (i = 2; i < device->brightness->count; i++) {
1905 l = device->brightness->levels[i];
1906 if (l < min)
1907 min = l;
1908 if (l > max)
1909 max = l;
1910 if (l < min_above && l > level_current)
1911 min_above = l;
1912 if (l > max_below && l < level_current)
1913 max_below = l;
1914 }
1915
1916 switch (event) {
1917 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1918 return (level_current < max) ? min_above : min;
1919 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1920 return (level_current < max) ? min_above : max;
1921 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1922 return (level_current > min) ? max_below : min;
1923 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1924 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1925 return 0;
1926 default:
1927 return level_current;
1928 }
1929 }
1930
1931 static int
1932 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1933 {
1934 unsigned long long level_current, level_next;
1935 int result = -EINVAL;
1936
1937 if (!device->brightness)
1938 goto out;
1939
1940 result = acpi_video_device_lcd_get_level_current(device,
1941 &level_current);
1942 if (result)
1943 goto out;
1944
1945 level_next = acpi_video_get_next_level(device, level_current, event);
1946
1947 result = acpi_video_device_lcd_set_level(device, level_next);
1948
1949 out:
1950 if (result)
1951 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1952
1953 return result;
1954 }
1955
1956 static int
1957 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1958 struct acpi_device *device)
1959 {
1960 int status = 0;
1961 struct acpi_device *dev;
1962
1963 acpi_video_device_enumerate(video);
1964
1965 list_for_each_entry(dev, &device->children, node) {
1966
1967 status = acpi_video_bus_get_one_device(dev, video);
1968 if (ACPI_FAILURE(status)) {
1969 printk(KERN_WARNING PREFIX
1970 "Cant attach device");
1971 continue;
1972 }
1973 }
1974 return status;
1975 }
1976
1977 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1978 {
1979 acpi_status status;
1980 struct acpi_video_bus *video;
1981
1982
1983 if (!device || !device->video)
1984 return -ENOENT;
1985
1986 video = device->video;
1987
1988 acpi_video_device_remove_fs(device->dev);
1989
1990 status = acpi_remove_notify_handler(device->dev->handle,
1991 ACPI_DEVICE_NOTIFY,
1992 acpi_video_device_notify);
1993 backlight_device_unregister(device->backlight);
1994 if (device->cdev) {
1995 sysfs_remove_link(&device->dev->dev.kobj,
1996 "thermal_cooling");
1997 sysfs_remove_link(&device->cdev->device.kobj,
1998 "device");
1999 thermal_cooling_device_unregister(device->cdev);
2000 device->cdev = NULL;
2001 }
2002 video_output_unregister(device->output_dev);
2003
2004 return 0;
2005 }
2006
2007 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
2008 {
2009 int status;
2010 struct acpi_video_device *dev, *next;
2011
2012 mutex_lock(&video->device_list_lock);
2013
2014 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
2015
2016 status = acpi_video_bus_put_one_device(dev);
2017 if (ACPI_FAILURE(status))
2018 printk(KERN_WARNING PREFIX
2019 "hhuuhhuu bug in acpi video driver.\n");
2020
2021 if (dev->brightness) {
2022 kfree(dev->brightness->levels);
2023 kfree(dev->brightness);
2024 }
2025 list_del(&dev->entry);
2026 kfree(dev);
2027 }
2028
2029 mutex_unlock(&video->device_list_lock);
2030
2031 return 0;
2032 }
2033
2034 /* acpi_video interface */
2035
2036 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
2037 {
2038 return acpi_video_bus_DOS(video, 0, 0);
2039 }
2040
2041 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
2042 {
2043 return acpi_video_bus_DOS(video, 0, 1);
2044 }
2045
2046 static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
2047 {
2048 struct acpi_video_bus *video = acpi_driver_data(device);
2049 struct input_dev *input;
2050 int keycode;
2051
2052 if (!video)
2053 return;
2054
2055 input = video->input;
2056
2057 switch (event) {
2058 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
2059 * most likely via hotkey. */
2060 acpi_bus_generate_proc_event(device, event, 0);
2061 keycode = KEY_SWITCHVIDEOMODE;
2062 break;
2063
2064 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
2065 * connector. */
2066 acpi_video_device_enumerate(video);
2067 acpi_video_device_rebind(video);
2068 acpi_bus_generate_proc_event(device, event, 0);
2069 keycode = KEY_SWITCHVIDEOMODE;
2070 break;
2071
2072 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2073 acpi_bus_generate_proc_event(device, event, 0);
2074 keycode = KEY_SWITCHVIDEOMODE;
2075 break;
2076 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2077 acpi_bus_generate_proc_event(device, event, 0);
2078 keycode = KEY_VIDEO_NEXT;
2079 break;
2080 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2081 acpi_bus_generate_proc_event(device, event, 0);
2082 keycode = KEY_VIDEO_PREV;
2083 break;
2084
2085 default:
2086 keycode = KEY_UNKNOWN;
2087 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2088 "Unsupported event [0x%x]\n", event));
2089 break;
2090 }
2091
2092 acpi_notifier_call_chain(device, event, 0);
2093 input_report_key(input, keycode, 1);
2094 input_sync(input);
2095 input_report_key(input, keycode, 0);
2096 input_sync(input);
2097
2098 return;
2099 }
2100
2101 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2102 {
2103 struct acpi_video_device *video_device = data;
2104 struct acpi_device *device = NULL;
2105 struct acpi_video_bus *bus;
2106 struct input_dev *input;
2107 int keycode;
2108
2109 if (!video_device)
2110 return;
2111
2112 device = video_device->dev;
2113 bus = video_device->video;
2114 input = bus->input;
2115
2116 switch (event) {
2117 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
2118 if (brightness_switch_enabled)
2119 acpi_video_switch_brightness(video_device, event);
2120 acpi_bus_generate_proc_event(device, event, 0);
2121 keycode = KEY_BRIGHTNESS_CYCLE;
2122 break;
2123 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
2124 if (brightness_switch_enabled)
2125 acpi_video_switch_brightness(video_device, event);
2126 acpi_bus_generate_proc_event(device, event, 0);
2127 keycode = KEY_BRIGHTNESSUP;
2128 break;
2129 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2130 if (brightness_switch_enabled)
2131 acpi_video_switch_brightness(video_device, event);
2132 acpi_bus_generate_proc_event(device, event, 0);
2133 keycode = KEY_BRIGHTNESSDOWN;
2134 break;
2135 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2136 if (brightness_switch_enabled)
2137 acpi_video_switch_brightness(video_device, event);
2138 acpi_bus_generate_proc_event(device, event, 0);
2139 keycode = KEY_BRIGHTNESS_ZERO;
2140 break;
2141 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2142 if (brightness_switch_enabled)
2143 acpi_video_switch_brightness(video_device, event);
2144 acpi_bus_generate_proc_event(device, event, 0);
2145 keycode = KEY_DISPLAY_OFF;
2146 break;
2147 default:
2148 keycode = KEY_UNKNOWN;
2149 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2150 "Unsupported event [0x%x]\n", event));
2151 break;
2152 }
2153
2154 acpi_notifier_call_chain(device, event, 0);
2155 input_report_key(input, keycode, 1);
2156 input_sync(input);
2157 input_report_key(input, keycode, 0);
2158 input_sync(input);
2159
2160 return;
2161 }
2162
2163 static int instance;
2164 static int acpi_video_resume(struct acpi_device *device)
2165 {
2166 struct acpi_video_bus *video;
2167 struct acpi_video_device *video_device;
2168 int i;
2169
2170 if (!device || !acpi_driver_data(device))
2171 return -EINVAL;
2172
2173 video = acpi_driver_data(device);
2174
2175 for (i = 0; i < video->attached_count; i++) {
2176 video_device = video->attached_array[i].bind_info;
2177 if (video_device && video_device->backlight)
2178 acpi_video_set_brightness(video_device->backlight);
2179 }
2180 return AE_OK;
2181 }
2182
2183 static int acpi_video_bus_add(struct acpi_device *device)
2184 {
2185 struct acpi_video_bus *video;
2186 struct input_dev *input;
2187 int error;
2188
2189 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2190 if (!video)
2191 return -ENOMEM;
2192
2193 /* a hack to fix the duplicate name "VID" problem on T61 */
2194 if (!strcmp(device->pnp.bus_id, "VID")) {
2195 if (instance)
2196 device->pnp.bus_id[3] = '0' + instance;
2197 instance ++;
2198 }
2199 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2200 if (!strcmp(device->pnp.bus_id, "VGA")) {
2201 if (instance)
2202 device->pnp.bus_id[3] = '0' + instance;
2203 instance++;
2204 }
2205
2206 video->device = device;
2207 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2208 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2209 device->driver_data = video;
2210
2211 acpi_video_bus_find_cap(video);
2212 error = acpi_video_bus_check(video);
2213 if (error)
2214 goto err_free_video;
2215
2216 error = acpi_video_bus_add_fs(device);
2217 if (error)
2218 goto err_free_video;
2219
2220 mutex_init(&video->device_list_lock);
2221 INIT_LIST_HEAD(&video->video_device_list);
2222
2223 acpi_video_bus_get_devices(video, device);
2224 acpi_video_bus_start_devices(video);
2225
2226 video->input = input = input_allocate_device();
2227 if (!input) {
2228 error = -ENOMEM;
2229 goto err_stop_video;
2230 }
2231
2232 snprintf(video->phys, sizeof(video->phys),
2233 "%s/video/input0", acpi_device_hid(video->device));
2234
2235 input->name = acpi_device_name(video->device);
2236 input->phys = video->phys;
2237 input->id.bustype = BUS_HOST;
2238 input->id.product = 0x06;
2239 input->dev.parent = &device->dev;
2240 input->evbit[0] = BIT(EV_KEY);
2241 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2242 set_bit(KEY_VIDEO_NEXT, input->keybit);
2243 set_bit(KEY_VIDEO_PREV, input->keybit);
2244 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2245 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2246 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2247 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2248 set_bit(KEY_DISPLAY_OFF, input->keybit);
2249 set_bit(KEY_UNKNOWN, input->keybit);
2250
2251 error = input_register_device(input);
2252 if (error)
2253 goto err_free_input_dev;
2254
2255 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2256 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2257 video->flags.multihead ? "yes" : "no",
2258 video->flags.rom ? "yes" : "no",
2259 video->flags.post ? "yes" : "no");
2260
2261 return 0;
2262
2263 err_free_input_dev:
2264 input_free_device(input);
2265 err_stop_video:
2266 acpi_video_bus_stop_devices(video);
2267 acpi_video_bus_put_devices(video);
2268 kfree(video->attached_array);
2269 acpi_video_bus_remove_fs(device);
2270 err_free_video:
2271 kfree(video);
2272 device->driver_data = NULL;
2273
2274 return error;
2275 }
2276
2277 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2278 {
2279 struct acpi_video_bus *video = NULL;
2280
2281
2282 if (!device || !acpi_driver_data(device))
2283 return -EINVAL;
2284
2285 video = acpi_driver_data(device);
2286
2287 acpi_video_bus_stop_devices(video);
2288 acpi_video_bus_put_devices(video);
2289 acpi_video_bus_remove_fs(device);
2290
2291 input_unregister_device(video->input);
2292 kfree(video->attached_array);
2293 kfree(video);
2294
2295 return 0;
2296 }
2297
2298 static int __init intel_opregion_present(void)
2299 {
2300 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2301 struct pci_dev *dev = NULL;
2302 u32 address;
2303
2304 for_each_pci_dev(dev) {
2305 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2306 continue;
2307 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2308 continue;
2309 pci_read_config_dword(dev, 0xfc, &address);
2310 if (!address)
2311 continue;
2312 return 1;
2313 }
2314 #endif
2315 return 0;
2316 }
2317
2318 int acpi_video_register(void)
2319 {
2320 int result = 0;
2321
2322 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2323 if (!acpi_video_dir)
2324 return -ENODEV;
2325
2326 result = acpi_bus_register_driver(&acpi_video_bus);
2327 if (result < 0) {
2328 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2329 return -ENODEV;
2330 }
2331
2332 return 0;
2333 }
2334 EXPORT_SYMBOL(acpi_video_register);
2335
2336 /*
2337 * This is kind of nasty. Hardware using Intel chipsets may require
2338 * the video opregion code to be run first in order to initialise
2339 * state before any ACPI video calls are made. To handle this we defer
2340 * registration of the video class until the opregion code has run.
2341 */
2342
2343 static int __init acpi_video_init(void)
2344 {
2345 dmi_check_system(video_dmi_table);
2346
2347 if (intel_opregion_present())
2348 return 0;
2349
2350 return acpi_video_register();
2351 }
2352
2353 void acpi_video_exit(void)
2354 {
2355
2356 acpi_bus_unregister_driver(&acpi_video_bus);
2357
2358 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2359
2360 return;
2361 }
2362 EXPORT_SYMBOL(acpi_video_exit);
2363
2364 module_init(acpi_video_init);
2365 module_exit(acpi_video_exit);
Support for the Chinese Samsung S3C2440 based development boards