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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / acpi / video.c
blob64e3c581b7a987cf4fef32f0ee78ff16e247c554
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <linux/sort.h>
40 #include <linux/pci.h>
41 #include <linux/pci_ids.h>
42 #include <asm/uaccess.h>
43 #include <linux/dmi.h>
44 #include <acpi/acpi_bus.h>
45 #include <acpi/acpi_drivers.h>
46
47 #define PREFIX "ACPI: "
48
49 #define ACPI_VIDEO_CLASS "video"
50 #define ACPI_VIDEO_BUS_NAME "Video Bus"
51 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
52 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
53 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
54 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
55 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
56 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
57
58 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
59 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
60 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
61 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
62 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
63
64 #define MAX_NAME_LEN 20
65
66 #define ACPI_VIDEO_DISPLAY_CRT 1
67 #define ACPI_VIDEO_DISPLAY_TV 2
68 #define ACPI_VIDEO_DISPLAY_DVI 3
69 #define ACPI_VIDEO_DISPLAY_LCD 4
70
71 #define _COMPONENT ACPI_VIDEO_COMPONENT
72 ACPI_MODULE_NAME("video");
73
74 MODULE_AUTHOR("Bruno Ducrot");
75 MODULE_DESCRIPTION("ACPI Video Driver");
76 MODULE_LICENSE("GPL");
77
78 static int brightness_switch_enabled = 1;
79 module_param(brightness_switch_enabled, bool, 0644);
80
81 static int register_count = 0;
82 static int acpi_video_bus_add(struct acpi_device *device);
83 static int acpi_video_bus_remove(struct acpi_device *device, int type);
84 static int acpi_video_resume(struct acpi_device *device);
85 static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
86
87 static const struct acpi_device_id video_device_ids[] = {
88 {ACPI_VIDEO_HID, 0},
89 {"", 0},
90 };
91 MODULE_DEVICE_TABLE(acpi, video_device_ids);
92
93 static struct acpi_driver acpi_video_bus = {
94 .name = "video",
95 .class = ACPI_VIDEO_CLASS,
96 .ids = video_device_ids,
97 .ops = {
98 .add = acpi_video_bus_add,
99 .remove = acpi_video_bus_remove,
100 .resume = acpi_video_resume,
101 .notify = acpi_video_bus_notify,
102 },
103 };
104
105 struct acpi_video_bus_flags {
106 u8 multihead:1; /* can switch video heads */
107 u8 rom:1; /* can retrieve a video rom */
108 u8 post:1; /* can configure the head to */
109 u8 reserved:5;
110 };
111
112 struct acpi_video_bus_cap {
113 u8 _DOS:1; /*Enable/Disable output switching */
114 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
115 u8 _ROM:1; /*Get ROM Data */
116 u8 _GPD:1; /*Get POST Device */
117 u8 _SPD:1; /*Set POST Device */
118 u8 _VPO:1; /*Video POST Options */
119 u8 reserved:2;
120 };
121
122 struct acpi_video_device_attrib {
123 u32 display_index:4; /* A zero-based instance of the Display */
124 u32 display_port_attachment:4; /*This field differentiates the display type */
125 u32 display_type:4; /*Describe the specific type in use */
126 u32 vendor_specific:4; /*Chipset Vendor Specific */
127 u32 bios_can_detect:1; /*BIOS can detect the device */
128 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
129 the VGA device. */
130 u32 pipe_id:3; /*For VGA multiple-head devices. */
131 u32 reserved:10; /*Must be 0 */
132 u32 device_id_scheme:1; /*Device ID Scheme */
133 };
134
135 struct acpi_video_enumerated_device {
136 union {
137 u32 int_val;
138 struct acpi_video_device_attrib attrib;
139 } value;
140 struct acpi_video_device *bind_info;
141 };
142
143 struct acpi_video_bus {
144 struct acpi_device *device;
145 u8 dos_setting;
146 struct acpi_video_enumerated_device *attached_array;
147 u8 attached_count;
148 struct acpi_video_bus_cap cap;
149 struct acpi_video_bus_flags flags;
150 struct list_head video_device_list;
151 struct mutex device_list_lock; /* protects video_device_list */
152 struct proc_dir_entry *dir;
153 struct input_dev *input;
154 char phys[32]; /* for input device */
155 };
156
157 struct acpi_video_device_flags {
158 u8 crt:1;
159 u8 lcd:1;
160 u8 tvout:1;
161 u8 dvi:1;
162 u8 bios:1;
163 u8 unknown:1;
164 u8 reserved:2;
165 };
166
167 struct acpi_video_device_cap {
168 u8 _ADR:1; /*Return the unique ID */
169 u8 _BCL:1; /*Query list of brightness control levels supported */
170 u8 _BCM:1; /*Set the brightness level */
171 u8 _BQC:1; /* Get current brightness level */
172 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
173 u8 _DDC:1; /*Return the EDID for this device */
174 u8 _DCS:1; /*Return status of output device */
175 u8 _DGS:1; /*Query graphics state */
176 u8 _DSS:1; /*Device state set */
177 };
178
179 struct acpi_video_brightness_flags {
180 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
181 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
182 u8 _BCL_use_index:1; /* levels in _BCL are index values */
183 u8 _BCM_use_index:1; /* input of _BCM is an index value */
184 u8 _BQC_use_index:1; /* _BQC returns an index value */
185 };
186
187 struct acpi_video_device_brightness {
188 int curr;
189 int count;
190 int *levels;
191 struct acpi_video_brightness_flags flags;
192 };
193
194 struct acpi_video_device {
195 unsigned long device_id;
196 struct acpi_video_device_flags flags;
197 struct acpi_video_device_cap cap;
198 struct list_head entry;
199 struct acpi_video_bus *video;
200 struct acpi_device *dev;
201 struct acpi_video_device_brightness *brightness;
202 struct backlight_device *backlight;
203 struct thermal_cooling_device *cooling_dev;
204 struct output_device *output_dev;
205 };
206
207 /* bus */
208 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
209 static const struct file_operations acpi_video_bus_info_fops = {
210 .owner = THIS_MODULE,
211 .open = acpi_video_bus_info_open_fs,
212 .read = seq_read,
213 .llseek = seq_lseek,
214 .release = single_release,
215 };
216
217 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
218 static const struct file_operations acpi_video_bus_ROM_fops = {
219 .owner = THIS_MODULE,
220 .open = acpi_video_bus_ROM_open_fs,
221 .read = seq_read,
222 .llseek = seq_lseek,
223 .release = single_release,
224 };
225
226 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
227 struct file *file);
228 static const struct file_operations acpi_video_bus_POST_info_fops = {
229 .owner = THIS_MODULE,
230 .open = acpi_video_bus_POST_info_open_fs,
231 .read = seq_read,
232 .llseek = seq_lseek,
233 .release = single_release,
234 };
235
236 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
237 static ssize_t acpi_video_bus_write_POST(struct file *file,
238 const char __user *buffer, size_t count, loff_t *data);
239 static const struct file_operations acpi_video_bus_POST_fops = {
240 .owner = THIS_MODULE,
241 .open = acpi_video_bus_POST_open_fs,
242 .read = seq_read,
243 .write = acpi_video_bus_write_POST,
244 .llseek = seq_lseek,
245 .release = single_release,
246 };
247
248 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
249 static ssize_t acpi_video_bus_write_DOS(struct file *file,
250 const char __user *buffer, size_t count, loff_t *data);
251 static const struct file_operations acpi_video_bus_DOS_fops = {
252 .owner = THIS_MODULE,
253 .open = acpi_video_bus_DOS_open_fs,
254 .read = seq_read,
255 .write = acpi_video_bus_write_DOS,
256 .llseek = seq_lseek,
257 .release = single_release,
258 };
259
260 /* device */
261 static int acpi_video_device_info_open_fs(struct inode *inode,
262 struct file *file);
263 static const struct file_operations acpi_video_device_info_fops = {
264 .owner = THIS_MODULE,
265 .open = acpi_video_device_info_open_fs,
266 .read = seq_read,
267 .llseek = seq_lseek,
268 .release = single_release,
269 };
270
271 static int acpi_video_device_state_open_fs(struct inode *inode,
272 struct file *file);
273 static ssize_t acpi_video_device_write_state(struct file *file,
274 const char __user *buffer, size_t count, loff_t *data);
275 static const struct file_operations acpi_video_device_state_fops = {
276 .owner = THIS_MODULE,
277 .open = acpi_video_device_state_open_fs,
278 .read = seq_read,
279 .write = acpi_video_device_write_state,
280 .llseek = seq_lseek,
281 .release = single_release,
282 };
283
284 static int acpi_video_device_brightness_open_fs(struct inode *inode,
285 struct file *file);
286 static ssize_t acpi_video_device_write_brightness(struct file *file,
287 const char __user *buffer, size_t count, loff_t *data);
288 static const struct file_operations acpi_video_device_brightness_fops = {
289 .owner = THIS_MODULE,
290 .open = acpi_video_device_brightness_open_fs,
291 .read = seq_read,
292 .write = acpi_video_device_write_brightness,
293 .llseek = seq_lseek,
294 .release = single_release,
295 };
296
297 static int acpi_video_device_EDID_open_fs(struct inode *inode,
298 struct file *file);
299 static const struct file_operations acpi_video_device_EDID_fops = {
300 .owner = THIS_MODULE,
301 .open = acpi_video_device_EDID_open_fs,
302 .read = seq_read,
303 .llseek = seq_lseek,
304 .release = single_release,
305 };
306
307 static const char device_decode[][30] = {
308 "motherboard VGA device",
309 "PCI VGA device",
310 "AGP VGA device",
311 "UNKNOWN",
312 };
313
314 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
315 static void acpi_video_device_rebind(struct acpi_video_bus *video);
316 static void acpi_video_device_bind(struct acpi_video_bus *video,
317 struct acpi_video_device *device);
318 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
319 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
320 int level);
321 static int acpi_video_device_lcd_get_level_current(
322 struct acpi_video_device *device,
323 unsigned long long *level);
324 static int acpi_video_get_next_level(struct acpi_video_device *device,
325 u32 level_current, u32 event);
326 static int acpi_video_switch_brightness(struct acpi_video_device *device,
327 int event);
328 static int acpi_video_device_get_state(struct acpi_video_device *device,
329 unsigned long long *state);
330 static int acpi_video_output_get(struct output_device *od);
331 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
332
333 /*backlight device sysfs support*/
334 static int acpi_video_get_brightness(struct backlight_device *bd)
335 {
336 unsigned long long cur_level;
337 int i;
338 struct acpi_video_device *vd =
339 (struct acpi_video_device *)bl_get_data(bd);
340
341 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
342 return -EINVAL;
343 for (i = 2; i < vd->brightness->count; i++) {
344 if (vd->brightness->levels[i] == cur_level)
345 /* The first two entries are special - see page 575
346 of the ACPI spec 3.0 */
347 return i-2;
348 }
349 return 0;
350 }
351
352 static int acpi_video_set_brightness(struct backlight_device *bd)
353 {
354 int request_level = bd->props.brightness + 2;
355 struct acpi_video_device *vd =
356 (struct acpi_video_device *)bl_get_data(bd);
357
358 return acpi_video_device_lcd_set_level(vd,
359 vd->brightness->levels[request_level]);
360 }
361
362 static struct backlight_ops acpi_backlight_ops = {
363 .get_brightness = acpi_video_get_brightness,
364 .update_status = acpi_video_set_brightness,
365 };
366
367 /*video output device sysfs support*/
368 static int acpi_video_output_get(struct output_device *od)
369 {
370 unsigned long long state;
371 struct acpi_video_device *vd =
372 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
373 acpi_video_device_get_state(vd, &state);
374 return (int)state;
375 }
376
377 static int acpi_video_output_set(struct output_device *od)
378 {
379 unsigned long state = od->request_state;
380 struct acpi_video_device *vd=
381 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
382 return acpi_video_device_set_state(vd, state);
383 }
384
385 static struct output_properties acpi_output_properties = {
386 .set_state = acpi_video_output_set,
387 .get_status = acpi_video_output_get,
388 };
389
390
391 /* thermal cooling device callbacks */
392 static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned
393 long *state)
394 {
395 struct acpi_device *device = cooling_dev->devdata;
396 struct acpi_video_device *video = acpi_driver_data(device);
397
398 *state = video->brightness->count - 3;
399 return 0;
400 }
401
402 static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned
403 long *state)
404 {
405 struct acpi_device *device = cooling_dev->devdata;
406 struct acpi_video_device *video = acpi_driver_data(device);
407 unsigned long long level;
408 int offset;
409
410 if (acpi_video_device_lcd_get_level_current(video, &level))
411 return -EINVAL;
412 for (offset = 2; offset < video->brightness->count; offset++)
413 if (level == video->brightness->levels[offset]) {
414 *state = video->brightness->count - offset - 1;
415 return 0;
416 }
417
418 return -EINVAL;
419 }
420
421 static int
422 video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state)
423 {
424 struct acpi_device *device = cooling_dev->devdata;
425 struct acpi_video_device *video = acpi_driver_data(device);
426 int level;
427
428 if ( state >= video->brightness->count - 2)
429 return -EINVAL;
430
431 state = video->brightness->count - state;
432 level = video->brightness->levels[state -1];
433 return acpi_video_device_lcd_set_level(video, level);
434 }
435
436 static struct thermal_cooling_device_ops video_cooling_ops = {
437 .get_max_state = video_get_max_state,
438 .get_cur_state = video_get_cur_state,
439 .set_cur_state = video_set_cur_state,
440 };
441
442 /* --------------------------------------------------------------------------
443 Video Management
444 -------------------------------------------------------------------------- */
445
446 /* device */
447
448 static int
449 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
450 {
451 int status;
452
453 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
454
455 return status;
456 }
457
458 static int
459 acpi_video_device_get_state(struct acpi_video_device *device,
460 unsigned long long *state)
461 {
462 int status;
463
464 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
465
466 return status;
467 }
468
469 static int
470 acpi_video_device_set_state(struct acpi_video_device *device, int state)
471 {
472 int status;
473 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
474 struct acpi_object_list args = { 1, &arg0 };
475 unsigned long long ret;
476
477
478 arg0.integer.value = state;
479 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
480
481 return status;
482 }
483
484 static int
485 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
486 union acpi_object **levels)
487 {
488 int status;
489 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
490 union acpi_object *obj;
491
492
493 *levels = NULL;
494
495 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
496 if (!ACPI_SUCCESS(status))
497 return status;
498 obj = (union acpi_object *)buffer.pointer;
499 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
500 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
501 status = -EFAULT;
502 goto err;
503 }
504
505 *levels = obj;
506
507 return 0;
508
509 err:
510 kfree(buffer.pointer);
511
512 return status;
513 }
514
515 static int
516 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
517 {
518 int status;
519 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
520 struct acpi_object_list args = { 1, &arg0 };
521 int state;
522
523 arg0.integer.value = level;
524
525 status = acpi_evaluate_object(device->dev->handle, "_BCM",
526 &args, NULL);
527 if (ACPI_FAILURE(status)) {
528 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
529 return -EIO;
530 }
531
532 device->brightness->curr = level;
533 for (state = 2; state < device->brightness->count; state++)
534 if (level == device->brightness->levels[state]) {
535 if (device->backlight)
536 device->backlight->props.brightness = state - 2;
537 return 0;
538 }
539
540 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
541 return -EINVAL;
542 }
543
544 /*
545 * For some buggy _BQC methods, we need to add a constant value to
546 * the _BQC return value to get the actual current brightness level
547 */
548
549 static int bqc_offset_aml_bug_workaround;
550 static int __init video_set_bqc_offset(const struct dmi_system_id *d)
551 {
552 bqc_offset_aml_bug_workaround = 9;
553 return 0;
554 }
555
556 static struct dmi_system_id video_dmi_table[] __initdata = {
557 /*
558 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
559 */
560 {
561 .callback = video_set_bqc_offset,
562 .ident = "Acer Aspire 5720",
563 .matches = {
564 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
565 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
566 },
567 },
568 {
569 .callback = video_set_bqc_offset,
570 .ident = "Acer Aspire 5710Z",
571 .matches = {
572 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
573 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
574 },
575 },
576 {
577 .callback = video_set_bqc_offset,
578 .ident = "eMachines E510",
579 .matches = {
580 DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"),
581 DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"),
582 },
583 },
584 {
585 .callback = video_set_bqc_offset,
586 .ident = "Acer Aspire 5315",
587 .matches = {
588 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
589 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
590 },
591 },
592 {
593 .callback = video_set_bqc_offset,
594 .ident = "Acer Aspire 7720",
595 .matches = {
596 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
597 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"),
598 },
599 },
600 {}
601 };
602
603 static int
604 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
605 unsigned long long *level)
606 {
607 acpi_status status = AE_OK;
608 int i;
609
610 if (device->cap._BQC || device->cap._BCQ) {
611 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
612
613 status = acpi_evaluate_integer(device->dev->handle, buf,
614 NULL, level);
615 if (ACPI_SUCCESS(status)) {
616 if (device->brightness->flags._BQC_use_index) {
617 if (device->brightness->flags._BCL_reversed)
618 *level = device->brightness->count
619 - 3 - (*level);
620 *level = device->brightness->levels[*level + 2];
621
622 }
623 *level += bqc_offset_aml_bug_workaround;
624 for (i = 2; i < device->brightness->count; i++)
625 if (device->brightness->levels[i] == *level) {
626 device->brightness->curr = *level;
627 return 0;
628 }
629 /* BQC returned an invalid level. Stop using it. */
630 ACPI_WARNING((AE_INFO, "%s returned an invalid level",
631 buf));
632 device->cap._BQC = device->cap._BCQ = 0;
633 } else {
634 /* Fixme:
635 * should we return an error or ignore this failure?
636 * dev->brightness->curr is a cached value which stores
637 * the correct current backlight level in most cases.
638 * ACPI video backlight still works w/ buggy _BQC.
639 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
640 */
641 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
642 device->cap._BQC = device->cap._BCQ = 0;
643 }
644 }
645
646 *level = device->brightness->curr;
647 return 0;
648 }
649
650 static int
651 acpi_video_device_EDID(struct acpi_video_device *device,
652 union acpi_object **edid, ssize_t length)
653 {
654 int status;
655 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
656 union acpi_object *obj;
657 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
658 struct acpi_object_list args = { 1, &arg0 };
659
660
661 *edid = NULL;
662
663 if (!device)
664 return -ENODEV;
665 if (length == 128)
666 arg0.integer.value = 1;
667 else if (length == 256)
668 arg0.integer.value = 2;
669 else
670 return -EINVAL;
671
672 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
673 if (ACPI_FAILURE(status))
674 return -ENODEV;
675
676 obj = buffer.pointer;
677
678 if (obj && obj->type == ACPI_TYPE_BUFFER)
679 *edid = obj;
680 else {
681 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
682 status = -EFAULT;
683 kfree(obj);
684 }
685
686 return status;
687 }
688
689 /* bus */
690
691 static int
692 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
693 {
694 int status;
695 unsigned long long tmp;
696 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
697 struct acpi_object_list args = { 1, &arg0 };
698
699
700 arg0.integer.value = option;
701
702 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
703 if (ACPI_SUCCESS(status))
704 status = tmp ? (-EINVAL) : (AE_OK);
705
706 return status;
707 }
708
709 static int
710 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
711 {
712 int status;
713
714 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
715
716 return status;
717 }
718
719 static int
720 acpi_video_bus_POST_options(struct acpi_video_bus *video,
721 unsigned long long *options)
722 {
723 int status;
724
725 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
726 *options &= 3;
727
728 return status;
729 }
730
731 /*
732 * Arg:
733 * video : video bus device pointer
734 * bios_flag :
735 * 0. The system BIOS should NOT automatically switch(toggle)
736 * the active display output.
737 * 1. The system BIOS should automatically switch (toggle) the
738 * active display output. No switch event.
739 * 2. The _DGS value should be locked.
740 * 3. The system BIOS should not automatically switch (toggle) the
741 * active display output, but instead generate the display switch
742 * event notify code.
743 * lcd_flag :
744 * 0. The system BIOS should automatically control the brightness level
745 * of the LCD when the power changes from AC to DC
746 * 1. The system BIOS should NOT automatically control the brightness
747 * level of the LCD when the power changes from AC to DC.
748 * Return Value:
749 * -1 wrong arg.
750 */
751
752 static int
753 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
754 {
755 acpi_integer status = 0;
756 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
757 struct acpi_object_list args = { 1, &arg0 };
758
759
760 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
761 status = -1;
762 goto Failed;
763 }
764 arg0.integer.value = (lcd_flag << 2) | bios_flag;
765 video->dos_setting = arg0.integer.value;
766 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
767
768 Failed:
769 return status;
770 }
771
772 /*
773 * Simple comparison function used to sort backlight levels.
774 */
775
776 static int
777 acpi_video_cmp_level(const void *a, const void *b)
778 {
779 return *(int *)a - *(int *)b;
780 }
781
782 /*
783 * Arg:
784 * device : video output device (LCD, CRT, ..)
785 *
786 * Return Value:
787 * Maximum brightness level
788 *
789 * Allocate and initialize device->brightness.
790 */
791
792 static int
793 acpi_video_init_brightness(struct acpi_video_device *device)
794 {
795 union acpi_object *obj = NULL;
796 int i, max_level = 0, count = 0, level_ac_battery = 0;
797 unsigned long long level, level_old;
798 union acpi_object *o;
799 struct acpi_video_device_brightness *br = NULL;
800 int result = -EINVAL;
801
802 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
803 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
804 "LCD brightness level\n"));
805 goto out;
806 }
807
808 if (obj->package.count < 2)
809 goto out;
810
811 br = kzalloc(sizeof(*br), GFP_KERNEL);
812 if (!br) {
813 printk(KERN_ERR "can't allocate memory\n");
814 result = -ENOMEM;
815 goto out;
816 }
817
818 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
819 GFP_KERNEL);
820 if (!br->levels) {
821 result = -ENOMEM;
822 goto out_free;
823 }
824
825 for (i = 0; i < obj->package.count; i++) {
826 o = (union acpi_object *)&obj->package.elements[i];
827 if (o->type != ACPI_TYPE_INTEGER) {
828 printk(KERN_ERR PREFIX "Invalid data\n");
829 continue;
830 }
831 br->levels[count] = (u32) o->integer.value;
832
833 if (br->levels[count] > max_level)
834 max_level = br->levels[count];
835 count++;
836 }
837
838 /*
839 * some buggy BIOS don't export the levels
840 * when machine is on AC/Battery in _BCL package.
841 * In this case, the first two elements in _BCL packages
842 * are also supported brightness levels that OS should take care of.
843 */
844 for (i = 2; i < count; i++) {
845 if (br->levels[i] == br->levels[0])
846 level_ac_battery++;
847 if (br->levels[i] == br->levels[1])
848 level_ac_battery++;
849 }
850
851 if (level_ac_battery < 2) {
852 level_ac_battery = 2 - level_ac_battery;
853 br->flags._BCL_no_ac_battery_levels = 1;
854 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
855 br->levels[i] = br->levels[i - level_ac_battery];
856 count += level_ac_battery;
857 } else if (level_ac_battery > 2)
858 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
859
860 /* Check if the _BCL package is in a reversed order */
861 if (max_level == br->levels[2]) {
862 br->flags._BCL_reversed = 1;
863 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
864 acpi_video_cmp_level, NULL);
865 } else if (max_level != br->levels[count - 1])
866 ACPI_ERROR((AE_INFO,
867 "Found unordered _BCL package\n"));
868
869 br->count = count;
870 device->brightness = br;
871
872 /* Check the input/output of _BQC/_BCL/_BCM */
873 if ((max_level < 100) && (max_level <= (count - 2)))
874 br->flags._BCL_use_index = 1;
875
876 /*
877 * _BCM is always consistent with _BCL,
878 * at least for all the laptops we have ever seen.
879 */
880 br->flags._BCM_use_index = br->flags._BCL_use_index;
881
882 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
883 br->curr = level = max_level;
884
885 if (!device->cap._BQC)
886 goto set_level;
887
888 result = acpi_video_device_lcd_get_level_current(device, &level_old);
889 if (result)
890 goto out_free_levels;
891
892 /*
893 * Set the level to maximum and check if _BQC uses indexed value
894 */
895 result = acpi_video_device_lcd_set_level(device, max_level);
896 if (result)
897 goto out_free_levels;
898
899 result = acpi_video_device_lcd_get_level_current(device, &level);
900 if (result)
901 goto out_free_levels;
902
903 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
904
905 if (!br->flags._BQC_use_index) {
906 /*
907 * Set the backlight to the initial state.
908 * On some buggy laptops, _BQC returns an uninitialized value
909 * when invoked for the first time, i.e. level_old is invalid.
910 * set the backlight to max_level in this case
911 */
912 for (i = 2; i < br->count; i++)
913 if (level_old == br->levels[i])
914 level = level_old;
915 goto set_level;
916 }
917
918 if (br->flags._BCL_reversed)
919 level_old = (br->count - 1) - level_old;
920 level = br->levels[level_old];
921
922 set_level:
923 result = acpi_video_device_lcd_set_level(device, level);
924 if (result)
925 goto out_free_levels;
926
927 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
928 "found %d brightness levels\n", count - 2));
929 kfree(obj);
930 return result;
931
932 out_free_levels:
933 kfree(br->levels);
934 out_free:
935 kfree(br);
936 out:
937 device->brightness = NULL;
938 kfree(obj);
939 return result;
940 }
941
942 /*
943 * Arg:
944 * device : video output device (LCD, CRT, ..)
945 *
946 * Return Value:
947 * None
948 *
949 * Find out all required AML methods defined under the output
950 * device.
951 */
952
953 static void acpi_video_device_find_cap(struct acpi_video_device *device)
954 {
955 acpi_handle h_dummy1;
956
957 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
958 device->cap._ADR = 1;
959 }
960 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
961 device->cap._BCL = 1;
962 }
963 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
964 device->cap._BCM = 1;
965 }
966 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
967 device->cap._BQC = 1;
968 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
969 &h_dummy1))) {
970 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
971 device->cap._BCQ = 1;
972 }
973
974 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
975 device->cap._DDC = 1;
976 }
977 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
978 device->cap._DCS = 1;
979 }
980 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
981 device->cap._DGS = 1;
982 }
983 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
984 device->cap._DSS = 1;
985 }
986
987 if (acpi_video_backlight_support()) {
988 int result;
989 static int count = 0;
990 char *name;
991
992 result = acpi_video_init_brightness(device);
993 if (result)
994 return;
995 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
996 if (!name)
997 return;
998
999 sprintf(name, "acpi_video%d", count++);
1000 device->backlight = backlight_device_register(name,
1001 NULL, device, &acpi_backlight_ops);
1002 device->backlight->props.max_brightness = device->brightness->count-3;
1003 kfree(name);
1004
1005 result = sysfs_create_link(&device->backlight->dev.kobj,
1006 &device->dev->dev.kobj, "device");
1007 if (result)
1008 printk(KERN_ERR PREFIX "Create sysfs link\n");
1009
1010 device->cooling_dev = thermal_cooling_device_register("LCD",
1011 device->dev, &video_cooling_ops);
1012 if (IS_ERR(device->cooling_dev)) {
1013 /*
1014 * Set cooling_dev to NULL so we don't crash trying to
1015 * free it.
1016 * Also, why the hell we are returning early and
1017 * not attempt to register video output if cooling
1018 * device registration failed?
1019 * -- dtor
1020 */
1021 device->cooling_dev = NULL;
1022 return;
1023 }
1024
1025 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
1026 device->cooling_dev->id);
1027 result = sysfs_create_link(&device->dev->dev.kobj,
1028 &device->cooling_dev->device.kobj,
1029 "thermal_cooling");
1030 if (result)
1031 printk(KERN_ERR PREFIX "Create sysfs link\n");
1032 result = sysfs_create_link(&device->cooling_dev->device.kobj,
1033 &device->dev->dev.kobj, "device");
1034 if (result)
1035 printk(KERN_ERR PREFIX "Create sysfs link\n");
1036
1037 }
1038
1039 if (acpi_video_display_switch_support()) {
1040
1041 if (device->cap._DCS && device->cap._DSS) {
1042 static int count;
1043 char *name;
1044 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
1045 if (!name)
1046 return;
1047 sprintf(name, "acpi_video%d", count++);
1048 device->output_dev = video_output_register(name,
1049 NULL, device, &acpi_output_properties);
1050 kfree(name);
1051 }
1052 }
1053 }
1054
1055 /*
1056 * Arg:
1057 * device : video output device (VGA)
1058 *
1059 * Return Value:
1060 * None
1061 *
1062 * Find out all required AML methods defined under the video bus device.
1063 */
1064
1065 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
1066 {
1067 acpi_handle h_dummy1;
1068
1069 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
1070 video->cap._DOS = 1;
1071 }
1072 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
1073 video->cap._DOD = 1;
1074 }
1075 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
1076 video->cap._ROM = 1;
1077 }
1078 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
1079 video->cap._GPD = 1;
1080 }
1081 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
1082 video->cap._SPD = 1;
1083 }
1084 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
1085 video->cap._VPO = 1;
1086 }
1087 }
1088
1089 /*
1090 * Check whether the video bus device has required AML method to
1091 * support the desired features
1092 */
1093
1094 static int acpi_video_bus_check(struct acpi_video_bus *video)
1095 {
1096 acpi_status status = -ENOENT;
1097 struct pci_dev *dev;
1098
1099 if (!video)
1100 return -EINVAL;
1101
1102 dev = acpi_get_pci_dev(video->device->handle);
1103 if (!dev)
1104 return -ENODEV;
1105 pci_dev_put(dev);
1106
1107 /* Since there is no HID, CID and so on for VGA driver, we have
1108 * to check well known required nodes.
1109 */
1110
1111 /* Does this device support video switching? */
1112 if (video->cap._DOS || video->cap._DOD) {
1113 if (!video->cap._DOS) {
1114 printk(KERN_WARNING FW_BUG
1115 "ACPI(%s) defines _DOD but not _DOS\n",
1116 acpi_device_bid(video->device));
1117 }
1118 video->flags.multihead = 1;
1119 status = 0;
1120 }
1121
1122 /* Does this device support retrieving a video ROM? */
1123 if (video->cap._ROM) {
1124 video->flags.rom = 1;
1125 status = 0;
1126 }
1127
1128 /* Does this device support configuring which video device to POST? */
1129 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1130 video->flags.post = 1;
1131 status = 0;
1132 }
1133
1134 return status;
1135 }
1136
1137 /* --------------------------------------------------------------------------
1138 FS Interface (/proc)
1139 -------------------------------------------------------------------------- */
1140
1141 static struct proc_dir_entry *acpi_video_dir;
1142
1143 /* video devices */
1144
1145 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1146 {
1147 struct acpi_video_device *dev = seq->private;
1148
1149
1150 if (!dev)
1151 goto end;
1152
1153 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1154 seq_printf(seq, "type: ");
1155 if (dev->flags.crt)
1156 seq_printf(seq, "CRT\n");
1157 else if (dev->flags.lcd)
1158 seq_printf(seq, "LCD\n");
1159 else if (dev->flags.tvout)
1160 seq_printf(seq, "TVOUT\n");
1161 else if (dev->flags.dvi)
1162 seq_printf(seq, "DVI\n");
1163 else
1164 seq_printf(seq, "UNKNOWN\n");
1165
1166 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1167
1168 end:
1169 return 0;
1170 }
1171
1172 static int
1173 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1174 {
1175 return single_open(file, acpi_video_device_info_seq_show,
1176 PDE(inode)->data);
1177 }
1178
1179 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1180 {
1181 int status;
1182 struct acpi_video_device *dev = seq->private;
1183 unsigned long long state;
1184
1185
1186 if (!dev)
1187 goto end;
1188
1189 status = acpi_video_device_get_state(dev, &state);
1190 seq_printf(seq, "state: ");
1191 if (ACPI_SUCCESS(status))
1192 seq_printf(seq, "0x%02llx\n", state);
1193 else
1194 seq_printf(seq, "<not supported>\n");
1195
1196 status = acpi_video_device_query(dev, &state);
1197 seq_printf(seq, "query: ");
1198 if (ACPI_SUCCESS(status))
1199 seq_printf(seq, "0x%02llx\n", state);
1200 else
1201 seq_printf(seq, "<not supported>\n");
1202
1203 end:
1204 return 0;
1205 }
1206
1207 static int
1208 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1209 {
1210 return single_open(file, acpi_video_device_state_seq_show,
1211 PDE(inode)->data);
1212 }
1213
1214 static ssize_t
1215 acpi_video_device_write_state(struct file *file,
1216 const char __user * buffer,
1217 size_t count, loff_t * data)
1218 {
1219 int status;
1220 struct seq_file *m = file->private_data;
1221 struct acpi_video_device *dev = m->private;
1222 char str[12] = { 0 };
1223 u32 state = 0;
1224
1225
1226 if (!dev || count + 1 > sizeof str)
1227 return -EINVAL;
1228
1229 if (copy_from_user(str, buffer, count))
1230 return -EFAULT;
1231
1232 str[count] = 0;
1233 state = simple_strtoul(str, NULL, 0);
1234 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1235
1236 status = acpi_video_device_set_state(dev, state);
1237
1238 if (status)
1239 return -EFAULT;
1240
1241 return count;
1242 }
1243
1244 static int
1245 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1246 {
1247 struct acpi_video_device *dev = seq->private;
1248 int i;
1249
1250
1251 if (!dev || !dev->brightness) {
1252 seq_printf(seq, "<not supported>\n");
1253 return 0;
1254 }
1255
1256 seq_printf(seq, "levels: ");
1257 for (i = 2; i < dev->brightness->count; i++)
1258 seq_printf(seq, " %d", dev->brightness->levels[i]);
1259 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1260
1261 return 0;
1262 }
1263
1264 static int
1265 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1266 {
1267 return single_open(file, acpi_video_device_brightness_seq_show,
1268 PDE(inode)->data);
1269 }
1270
1271 static ssize_t
1272 acpi_video_device_write_brightness(struct file *file,
1273 const char __user * buffer,
1274 size_t count, loff_t * data)
1275 {
1276 struct seq_file *m = file->private_data;
1277 struct acpi_video_device *dev = m->private;
1278 char str[5] = { 0 };
1279 unsigned int level = 0;
1280 int i;
1281
1282
1283 if (!dev || !dev->brightness || count + 1 > sizeof str)
1284 return -EINVAL;
1285
1286 if (copy_from_user(str, buffer, count))
1287 return -EFAULT;
1288
1289 str[count] = 0;
1290 level = simple_strtoul(str, NULL, 0);
1291
1292 if (level > 100)
1293 return -EFAULT;
1294
1295 /* validate through the list of available levels */
1296 for (i = 2; i < dev->brightness->count; i++)
1297 if (level == dev->brightness->levels[i]) {
1298 if (!acpi_video_device_lcd_set_level(dev, level))
1299 return count;
1300 break;
1301 }
1302
1303 return -EINVAL;
1304 }
1305
1306 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1307 {
1308 struct acpi_video_device *dev = seq->private;
1309 int status;
1310 int i;
1311 union acpi_object *edid = NULL;
1312
1313
1314 if (!dev)
1315 goto out;
1316
1317 status = acpi_video_device_EDID(dev, &edid, 128);
1318 if (ACPI_FAILURE(status)) {
1319 status = acpi_video_device_EDID(dev, &edid, 256);
1320 }
1321
1322 if (ACPI_FAILURE(status)) {
1323 goto out;
1324 }
1325
1326 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1327 for (i = 0; i < edid->buffer.length; i++)
1328 seq_putc(seq, edid->buffer.pointer[i]);
1329 }
1330
1331 out:
1332 if (!edid)
1333 seq_printf(seq, "<not supported>\n");
1334 else
1335 kfree(edid);
1336
1337 return 0;
1338 }
1339
1340 static int
1341 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1342 {
1343 return single_open(file, acpi_video_device_EDID_seq_show,
1344 PDE(inode)->data);
1345 }
1346
1347 static int acpi_video_device_add_fs(struct acpi_device *device)
1348 {
1349 struct proc_dir_entry *entry, *device_dir;
1350 struct acpi_video_device *vid_dev;
1351
1352 vid_dev = acpi_driver_data(device);
1353 if (!vid_dev)
1354 return -ENODEV;
1355
1356 device_dir = proc_mkdir(acpi_device_bid(device),
1357 vid_dev->video->dir);
1358 if (!device_dir)
1359 return -ENOMEM;
1360
1361 /* 'info' [R] */
1362 entry = proc_create_data("info", S_IRUGO, device_dir,
1363 &acpi_video_device_info_fops, acpi_driver_data(device));
1364 if (!entry)
1365 goto err_remove_dir;
1366
1367 /* 'state' [R/W] */
1368 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1369 device_dir,
1370 &acpi_video_device_state_fops,
1371 acpi_driver_data(device));
1372 if (!entry)
1373 goto err_remove_info;
1374
1375 /* 'brightness' [R/W] */
1376 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1377 device_dir,
1378 &acpi_video_device_brightness_fops,
1379 acpi_driver_data(device));
1380 if (!entry)
1381 goto err_remove_state;
1382
1383 /* 'EDID' [R] */
1384 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1385 &acpi_video_device_EDID_fops,
1386 acpi_driver_data(device));
1387 if (!entry)
1388 goto err_remove_brightness;
1389
1390 acpi_device_dir(device) = device_dir;
1391
1392 return 0;
1393
1394 err_remove_brightness:
1395 remove_proc_entry("brightness", device_dir);
1396 err_remove_state:
1397 remove_proc_entry("state", device_dir);
1398 err_remove_info:
1399 remove_proc_entry("info", device_dir);
1400 err_remove_dir:
1401 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1402 return -ENOMEM;
1403 }
1404
1405 static int acpi_video_device_remove_fs(struct acpi_device *device)
1406 {
1407 struct acpi_video_device *vid_dev;
1408 struct proc_dir_entry *device_dir;
1409
1410 vid_dev = acpi_driver_data(device);
1411 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1412 return -ENODEV;
1413
1414 device_dir = acpi_device_dir(device);
1415 if (device_dir) {
1416 remove_proc_entry("info", device_dir);
1417 remove_proc_entry("state", device_dir);
1418 remove_proc_entry("brightness", device_dir);
1419 remove_proc_entry("EDID", device_dir);
1420 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1421 acpi_device_dir(device) = NULL;
1422 }
1423
1424 return 0;
1425 }
1426
1427 /* video bus */
1428 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1429 {
1430 struct acpi_video_bus *video = seq->private;
1431
1432
1433 if (!video)
1434 goto end;
1435
1436 seq_printf(seq, "Switching heads: %s\n",
1437 video->flags.multihead ? "yes" : "no");
1438 seq_printf(seq, "Video ROM: %s\n",
1439 video->flags.rom ? "yes" : "no");
1440 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1441 video->flags.post ? "yes" : "no");
1442
1443 end:
1444 return 0;
1445 }
1446
1447 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1448 {
1449 return single_open(file, acpi_video_bus_info_seq_show,
1450 PDE(inode)->data);
1451 }
1452
1453 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1454 {
1455 struct acpi_video_bus *video = seq->private;
1456
1457
1458 if (!video)
1459 goto end;
1460
1461 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1462 seq_printf(seq, "<TODO>\n");
1463
1464 end:
1465 return 0;
1466 }
1467
1468 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1469 {
1470 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1471 }
1472
1473 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1474 {
1475 struct acpi_video_bus *video = seq->private;
1476 unsigned long long options;
1477 int status;
1478
1479
1480 if (!video)
1481 goto end;
1482
1483 status = acpi_video_bus_POST_options(video, &options);
1484 if (ACPI_SUCCESS(status)) {
1485 if (!(options & 1)) {
1486 printk(KERN_WARNING PREFIX
1487 "The motherboard VGA device is not listed as a possible POST device.\n");
1488 printk(KERN_WARNING PREFIX
1489 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1490 }
1491 printk(KERN_WARNING "%llx\n", options);
1492 seq_printf(seq, "can POST: <integrated video>");
1493 if (options & 2)
1494 seq_printf(seq, " <PCI video>");
1495 if (options & 4)
1496 seq_printf(seq, " <AGP video>");
1497 seq_putc(seq, '\n');
1498 } else
1499 seq_printf(seq, "<not supported>\n");
1500 end:
1501 return 0;
1502 }
1503
1504 static int
1505 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1506 {
1507 return single_open(file, acpi_video_bus_POST_info_seq_show,
1508 PDE(inode)->data);
1509 }
1510
1511 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1512 {
1513 struct acpi_video_bus *video = seq->private;
1514 int status;
1515 unsigned long long id;
1516
1517
1518 if (!video)
1519 goto end;
1520
1521 status = acpi_video_bus_get_POST(video, &id);
1522 if (!ACPI_SUCCESS(status)) {
1523 seq_printf(seq, "<not supported>\n");
1524 goto end;
1525 }
1526 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1527
1528 end:
1529 return 0;
1530 }
1531
1532 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1533 {
1534 struct acpi_video_bus *video = seq->private;
1535
1536
1537 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1538
1539 return 0;
1540 }
1541
1542 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1543 {
1544 return single_open(file, acpi_video_bus_POST_seq_show,
1545 PDE(inode)->data);
1546 }
1547
1548 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1549 {
1550 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1551 }
1552
1553 static ssize_t
1554 acpi_video_bus_write_POST(struct file *file,
1555 const char __user * buffer,
1556 size_t count, loff_t * data)
1557 {
1558 int status;
1559 struct seq_file *m = file->private_data;
1560 struct acpi_video_bus *video = m->private;
1561 char str[12] = { 0 };
1562 unsigned long long opt, options;
1563
1564
1565 if (!video || count + 1 > sizeof str)
1566 return -EINVAL;
1567
1568 status = acpi_video_bus_POST_options(video, &options);
1569 if (!ACPI_SUCCESS(status))
1570 return -EINVAL;
1571
1572 if (copy_from_user(str, buffer, count))
1573 return -EFAULT;
1574
1575 str[count] = 0;
1576 opt = strtoul(str, NULL, 0);
1577 if (opt > 3)
1578 return -EFAULT;
1579
1580 /* just in case an OEM 'forgot' the motherboard... */
1581 options |= 1;
1582
1583 if (options & (1ul << opt)) {
1584 status = acpi_video_bus_set_POST(video, opt);
1585 if (!ACPI_SUCCESS(status))
1586 return -EFAULT;
1587
1588 }
1589
1590 return count;
1591 }
1592
1593 static ssize_t
1594 acpi_video_bus_write_DOS(struct file *file,
1595 const char __user * buffer,
1596 size_t count, loff_t * data)
1597 {
1598 int status;
1599 struct seq_file *m = file->private_data;
1600 struct acpi_video_bus *video = m->private;
1601 char str[12] = { 0 };
1602 unsigned long opt;
1603
1604
1605 if (!video || count + 1 > sizeof str)
1606 return -EINVAL;
1607
1608 if (copy_from_user(str, buffer, count))
1609 return -EFAULT;
1610
1611 str[count] = 0;
1612 opt = strtoul(str, NULL, 0);
1613 if (opt > 7)
1614 return -EFAULT;
1615
1616 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1617
1618 if (!ACPI_SUCCESS(status))
1619 return -EFAULT;
1620
1621 return count;
1622 }
1623
1624 static int acpi_video_bus_add_fs(struct acpi_device *device)
1625 {
1626 struct acpi_video_bus *video = acpi_driver_data(device);
1627 struct proc_dir_entry *device_dir;
1628 struct proc_dir_entry *entry;
1629
1630 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1631 if (!device_dir)
1632 return -ENOMEM;
1633
1634 /* 'info' [R] */
1635 entry = proc_create_data("info", S_IRUGO, device_dir,
1636 &acpi_video_bus_info_fops,
1637 acpi_driver_data(device));
1638 if (!entry)
1639 goto err_remove_dir;
1640
1641 /* 'ROM' [R] */
1642 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1643 &acpi_video_bus_ROM_fops,
1644 acpi_driver_data(device));
1645 if (!entry)
1646 goto err_remove_info;
1647
1648 /* 'POST_info' [R] */
1649 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1650 &acpi_video_bus_POST_info_fops,
1651 acpi_driver_data(device));
1652 if (!entry)
1653 goto err_remove_rom;
1654
1655 /* 'POST' [R/W] */
1656 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1657 device_dir,
1658 &acpi_video_bus_POST_fops,
1659 acpi_driver_data(device));
1660 if (!entry)
1661 goto err_remove_post_info;
1662
1663 /* 'DOS' [R/W] */
1664 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1665 device_dir,
1666 &acpi_video_bus_DOS_fops,
1667 acpi_driver_data(device));
1668 if (!entry)
1669 goto err_remove_post;
1670
1671 video->dir = acpi_device_dir(device) = device_dir;
1672 return 0;
1673
1674 err_remove_post:
1675 remove_proc_entry("POST", device_dir);
1676 err_remove_post_info:
1677 remove_proc_entry("POST_info", device_dir);
1678 err_remove_rom:
1679 remove_proc_entry("ROM", device_dir);
1680 err_remove_info:
1681 remove_proc_entry("info", device_dir);
1682 err_remove_dir:
1683 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1684 return -ENOMEM;
1685 }
1686
1687 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1688 {
1689 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1690
1691 if (device_dir) {
1692 remove_proc_entry("info", device_dir);
1693 remove_proc_entry("ROM", device_dir);
1694 remove_proc_entry("POST_info", device_dir);
1695 remove_proc_entry("POST", device_dir);
1696 remove_proc_entry("DOS", device_dir);
1697 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1698 acpi_device_dir(device) = NULL;
1699 }
1700
1701 return 0;
1702 }
1703
1704 /* --------------------------------------------------------------------------
1705 Driver Interface
1706 -------------------------------------------------------------------------- */
1707
1708 /* device interface */
1709 static struct acpi_video_device_attrib*
1710 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1711 {
1712 struct acpi_video_enumerated_device *ids;
1713 int i;
1714
1715 for (i = 0; i < video->attached_count; i++) {
1716 ids = &video->attached_array[i];
1717 if ((ids->value.int_val & 0xffff) == device_id)
1718 return &ids->value.attrib;
1719 }
1720
1721 return NULL;
1722 }
1723
1724 static int
1725 acpi_video_bus_get_one_device(struct acpi_device *device,
1726 struct acpi_video_bus *video)
1727 {
1728 unsigned long long device_id;
1729 int status;
1730 struct acpi_video_device *data;
1731 struct acpi_video_device_attrib* attribute;
1732
1733 if (!device || !video)
1734 return -EINVAL;
1735
1736 status =
1737 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1738 if (ACPI_SUCCESS(status)) {
1739
1740 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1741 if (!data)
1742 return -ENOMEM;
1743
1744 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1745 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1746 device->driver_data = data;
1747
1748 data->device_id = device_id;
1749 data->video = video;
1750 data->dev = device;
1751
1752 attribute = acpi_video_get_device_attr(video, device_id);
1753
1754 if((attribute != NULL) && attribute->device_id_scheme) {
1755 switch (attribute->display_type) {
1756 case ACPI_VIDEO_DISPLAY_CRT:
1757 data->flags.crt = 1;
1758 break;
1759 case ACPI_VIDEO_DISPLAY_TV:
1760 data->flags.tvout = 1;
1761 break;
1762 case ACPI_VIDEO_DISPLAY_DVI:
1763 data->flags.dvi = 1;
1764 break;
1765 case ACPI_VIDEO_DISPLAY_LCD:
1766 data->flags.lcd = 1;
1767 break;
1768 default:
1769 data->flags.unknown = 1;
1770 break;
1771 }
1772 if(attribute->bios_can_detect)
1773 data->flags.bios = 1;
1774 } else
1775 data->flags.unknown = 1;
1776
1777 acpi_video_device_bind(video, data);
1778 acpi_video_device_find_cap(data);
1779
1780 status = acpi_install_notify_handler(device->handle,
1781 ACPI_DEVICE_NOTIFY,
1782 acpi_video_device_notify,
1783 data);
1784 if (ACPI_FAILURE(status)) {
1785 printk(KERN_ERR PREFIX
1786 "Error installing notify handler\n");
1787 if(data->brightness)
1788 kfree(data->brightness->levels);
1789 kfree(data->brightness);
1790 kfree(data);
1791 return -ENODEV;
1792 }
1793
1794 mutex_lock(&video->device_list_lock);
1795 list_add_tail(&data->entry, &video->video_device_list);
1796 mutex_unlock(&video->device_list_lock);
1797
1798 acpi_video_device_add_fs(device);
1799
1800 return 0;
1801 }
1802
1803 return -ENOENT;
1804 }
1805
1806 /*
1807 * Arg:
1808 * video : video bus device
1809 *
1810 * Return:
1811 * none
1812 *
1813 * Enumerate the video device list of the video bus,
1814 * bind the ids with the corresponding video devices
1815 * under the video bus.
1816 */
1817
1818 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1819 {
1820 struct acpi_video_device *dev;
1821
1822 mutex_lock(&video->device_list_lock);
1823
1824 list_for_each_entry(dev, &video->video_device_list, entry)
1825 acpi_video_device_bind(video, dev);
1826
1827 mutex_unlock(&video->device_list_lock);
1828 }
1829
1830 /*
1831 * Arg:
1832 * video : video bus device
1833 * device : video output device under the video
1834 * bus
1835 *
1836 * Return:
1837 * none
1838 *
1839 * Bind the ids with the corresponding video devices
1840 * under the video bus.
1841 */
1842
1843 static void
1844 acpi_video_device_bind(struct acpi_video_bus *video,
1845 struct acpi_video_device *device)
1846 {
1847 struct acpi_video_enumerated_device *ids;
1848 int i;
1849
1850 for (i = 0; i < video->attached_count; i++) {
1851 ids = &video->attached_array[i];
1852 if (device->device_id == (ids->value.int_val & 0xffff)) {
1853 ids->bind_info = device;
1854 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1855 }
1856 }
1857 }
1858
1859 /*
1860 * Arg:
1861 * video : video bus device
1862 *
1863 * Return:
1864 * < 0 : error
1865 *
1866 * Call _DOD to enumerate all devices attached to display adapter
1867 *
1868 */
1869
1870 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1871 {
1872 int status;
1873 int count;
1874 int i;
1875 struct acpi_video_enumerated_device *active_list;
1876 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1877 union acpi_object *dod = NULL;
1878 union acpi_object *obj;
1879
1880 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1881 if (!ACPI_SUCCESS(status)) {
1882 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1883 return status;
1884 }
1885
1886 dod = buffer.pointer;
1887 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1888 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1889 status = -EFAULT;
1890 goto out;
1891 }
1892
1893 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1894 dod->package.count));
1895
1896 active_list = kcalloc(1 + dod->package.count,
1897 sizeof(struct acpi_video_enumerated_device),
1898 GFP_KERNEL);
1899 if (!active_list) {
1900 status = -ENOMEM;
1901 goto out;
1902 }
1903
1904 count = 0;
1905 for (i = 0; i < dod->package.count; i++) {
1906 obj = &dod->package.elements[i];
1907
1908 if (obj->type != ACPI_TYPE_INTEGER) {
1909 printk(KERN_ERR PREFIX
1910 "Invalid _DOD data in element %d\n", i);
1911 continue;
1912 }
1913
1914 active_list[count].value.int_val = obj->integer.value;
1915 active_list[count].bind_info = NULL;
1916 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1917 (int)obj->integer.value));
1918 count++;
1919 }
1920
1921 kfree(video->attached_array);
1922
1923 video->attached_array = active_list;
1924 video->attached_count = count;
1925
1926 out:
1927 kfree(buffer.pointer);
1928 return status;
1929 }
1930
1931 static int
1932 acpi_video_get_next_level(struct acpi_video_device *device,
1933 u32 level_current, u32 event)
1934 {
1935 int min, max, min_above, max_below, i, l, delta = 255;
1936 max = max_below = 0;
1937 min = min_above = 255;
1938 /* Find closest level to level_current */
1939 for (i = 2; i < device->brightness->count; i++) {
1940 l = device->brightness->levels[i];
1941 if (abs(l - level_current) < abs(delta)) {
1942 delta = l - level_current;
1943 if (!delta)
1944 break;
1945 }
1946 }
1947 /* Ajust level_current to closest available level */
1948 level_current += delta;
1949 for (i = 2; i < device->brightness->count; i++) {
1950 l = device->brightness->levels[i];
1951 if (l < min)
1952 min = l;
1953 if (l > max)
1954 max = l;
1955 if (l < min_above && l > level_current)
1956 min_above = l;
1957 if (l > max_below && l < level_current)
1958 max_below = l;
1959 }
1960
1961 switch (event) {
1962 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1963 return (level_current < max) ? min_above : min;
1964 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1965 return (level_current < max) ? min_above : max;
1966 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1967 return (level_current > min) ? max_below : min;
1968 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1969 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1970 return 0;
1971 default:
1972 return level_current;
1973 }
1974 }
1975
1976 static int
1977 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1978 {
1979 unsigned long long level_current, level_next;
1980 int result = -EINVAL;
1981
1982 if (!device->brightness)
1983 goto out;
1984
1985 result = acpi_video_device_lcd_get_level_current(device,
1986 &level_current);
1987 if (result)
1988 goto out;
1989
1990 level_next = acpi_video_get_next_level(device, level_current, event);
1991
1992 result = acpi_video_device_lcd_set_level(device, level_next);
1993
1994 if (!result)
1995 backlight_force_update(device->backlight,
1996 BACKLIGHT_UPDATE_HOTKEY);
1997
1998 out:
1999 if (result)
2000 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
2001
2002 return result;
2003 }
2004
2005 static int
2006 acpi_video_bus_get_devices(struct acpi_video_bus *video,
2007 struct acpi_device *device)
2008 {
2009 int status = 0;
2010 struct acpi_device *dev;
2011
2012 acpi_video_device_enumerate(video);
2013
2014 list_for_each_entry(dev, &device->children, node) {
2015
2016 status = acpi_video_bus_get_one_device(dev, video);
2017 if (ACPI_FAILURE(status)) {
2018 printk(KERN_WARNING PREFIX
2019 "Cant attach device");
2020 continue;
2021 }
2022 }
2023 return status;
2024 }
2025
2026 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
2027 {
2028 acpi_status status;
2029 struct acpi_video_bus *video;
2030
2031
2032 if (!device || !device->video)
2033 return -ENOENT;
2034
2035 video = device->video;
2036
2037 acpi_video_device_remove_fs(device->dev);
2038
2039 status = acpi_remove_notify_handler(device->dev->handle,
2040 ACPI_DEVICE_NOTIFY,
2041 acpi_video_device_notify);
2042 if (device->backlight) {
2043 sysfs_remove_link(&device->backlight->dev.kobj, "device");
2044 backlight_device_unregister(device->backlight);
2045 device->backlight = NULL;
2046 }
2047 if (device->cooling_dev) {
2048 sysfs_remove_link(&device->dev->dev.kobj,
2049 "thermal_cooling");
2050 sysfs_remove_link(&device->cooling_dev->device.kobj,
2051 "device");
2052 thermal_cooling_device_unregister(device->cooling_dev);
2053 device->cooling_dev = NULL;
2054 }
2055 video_output_unregister(device->output_dev);
2056
2057 return 0;
2058 }
2059
2060 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
2061 {
2062 int status;
2063 struct acpi_video_device *dev, *next;
2064
2065 mutex_lock(&video->device_list_lock);
2066
2067 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
2068
2069 status = acpi_video_bus_put_one_device(dev);
2070 if (ACPI_FAILURE(status))
2071 printk(KERN_WARNING PREFIX
2072 "hhuuhhuu bug in acpi video driver.\n");
2073
2074 if (dev->brightness) {
2075 kfree(dev->brightness->levels);
2076 kfree(dev->brightness);
2077 }
2078 list_del(&dev->entry);
2079 kfree(dev);
2080 }
2081
2082 mutex_unlock(&video->device_list_lock);
2083
2084 return 0;
2085 }
2086
2087 /* acpi_video interface */
2088
2089 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
2090 {
2091 return acpi_video_bus_DOS(video, 0, 0);
2092 }
2093
2094 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
2095 {
2096 return acpi_video_bus_DOS(video, 0, 1);
2097 }
2098
2099 static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
2100 {
2101 struct acpi_video_bus *video = acpi_driver_data(device);
2102 struct input_dev *input;
2103 int keycode;
2104
2105 if (!video)
2106 return;
2107
2108 input = video->input;
2109
2110 switch (event) {
2111 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
2112 * most likely via hotkey. */
2113 acpi_bus_generate_proc_event(device, event, 0);
2114 keycode = KEY_SWITCHVIDEOMODE;
2115 break;
2116
2117 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
2118 * connector. */
2119 acpi_video_device_enumerate(video);
2120 acpi_video_device_rebind(video);
2121 acpi_bus_generate_proc_event(device, event, 0);
2122 keycode = KEY_SWITCHVIDEOMODE;
2123 break;
2124
2125 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2126 acpi_bus_generate_proc_event(device, event, 0);
2127 keycode = KEY_SWITCHVIDEOMODE;
2128 break;
2129 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2130 acpi_bus_generate_proc_event(device, event, 0);
2131 keycode = KEY_VIDEO_NEXT;
2132 break;
2133 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2134 acpi_bus_generate_proc_event(device, event, 0);
2135 keycode = KEY_VIDEO_PREV;
2136 break;
2137
2138 default:
2139 keycode = KEY_UNKNOWN;
2140 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2141 "Unsupported event [0x%x]\n", event));
2142 break;
2143 }
2144
2145 acpi_notifier_call_chain(device, event, 0);
2146 input_report_key(input, keycode, 1);
2147 input_sync(input);
2148 input_report_key(input, keycode, 0);
2149 input_sync(input);
2150
2151 return;
2152 }
2153
2154 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2155 {
2156 struct acpi_video_device *video_device = data;
2157 struct acpi_device *device = NULL;
2158 struct acpi_video_bus *bus;
2159 struct input_dev *input;
2160 int keycode;
2161
2162 if (!video_device)
2163 return;
2164
2165 device = video_device->dev;
2166 bus = video_device->video;
2167 input = bus->input;
2168
2169 switch (event) {
2170 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
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_BRIGHTNESS_CYCLE;
2175 break;
2176 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
2177 if (brightness_switch_enabled)
2178 acpi_video_switch_brightness(video_device, event);
2179 acpi_bus_generate_proc_event(device, event, 0);
2180 keycode = KEY_BRIGHTNESSUP;
2181 break;
2182 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2183 if (brightness_switch_enabled)
2184 acpi_video_switch_brightness(video_device, event);
2185 acpi_bus_generate_proc_event(device, event, 0);
2186 keycode = KEY_BRIGHTNESSDOWN;
2187 break;
2188 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2189 if (brightness_switch_enabled)
2190 acpi_video_switch_brightness(video_device, event);
2191 acpi_bus_generate_proc_event(device, event, 0);
2192 keycode = KEY_BRIGHTNESS_ZERO;
2193 break;
2194 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2195 if (brightness_switch_enabled)
2196 acpi_video_switch_brightness(video_device, event);
2197 acpi_bus_generate_proc_event(device, event, 0);
2198 keycode = KEY_DISPLAY_OFF;
2199 break;
2200 default:
2201 keycode = KEY_UNKNOWN;
2202 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2203 "Unsupported event [0x%x]\n", event));
2204 break;
2205 }
2206
2207 acpi_notifier_call_chain(device, event, 0);
2208 input_report_key(input, keycode, 1);
2209 input_sync(input);
2210 input_report_key(input, keycode, 0);
2211 input_sync(input);
2212
2213 return;
2214 }
2215
2216 static int instance;
2217 static int acpi_video_resume(struct acpi_device *device)
2218 {
2219 struct acpi_video_bus *video;
2220 struct acpi_video_device *video_device;
2221 int i;
2222
2223 if (!device || !acpi_driver_data(device))
2224 return -EINVAL;
2225
2226 video = acpi_driver_data(device);
2227
2228 for (i = 0; i < video->attached_count; i++) {
2229 video_device = video->attached_array[i].bind_info;
2230 if (video_device && video_device->backlight)
2231 acpi_video_set_brightness(video_device->backlight);
2232 }
2233 return AE_OK;
2234 }
2235
2236 static int acpi_video_bus_add(struct acpi_device *device)
2237 {
2238 struct acpi_video_bus *video;
2239 struct input_dev *input;
2240 int error;
2241
2242 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2243 if (!video)
2244 return -ENOMEM;
2245
2246 /* a hack to fix the duplicate name "VID" problem on T61 */
2247 if (!strcmp(device->pnp.bus_id, "VID")) {
2248 if (instance)
2249 device->pnp.bus_id[3] = '0' + instance;
2250 instance ++;
2251 }
2252 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2253 if (!strcmp(device->pnp.bus_id, "VGA")) {
2254 if (instance)
2255 device->pnp.bus_id[3] = '0' + instance;
2256 instance++;
2257 }
2258
2259 video->device = device;
2260 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2261 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2262 device->driver_data = video;
2263
2264 acpi_video_bus_find_cap(video);
2265 error = acpi_video_bus_check(video);
2266 if (error)
2267 goto err_free_video;
2268
2269 error = acpi_video_bus_add_fs(device);
2270 if (error)
2271 goto err_free_video;
2272
2273 mutex_init(&video->device_list_lock);
2274 INIT_LIST_HEAD(&video->video_device_list);
2275
2276 acpi_video_bus_get_devices(video, device);
2277 acpi_video_bus_start_devices(video);
2278
2279 video->input = input = input_allocate_device();
2280 if (!input) {
2281 error = -ENOMEM;
2282 goto err_stop_video;
2283 }
2284
2285 snprintf(video->phys, sizeof(video->phys),
2286 "%s/video/input0", acpi_device_hid(video->device));
2287
2288 input->name = acpi_device_name(video->device);
2289 input->phys = video->phys;
2290 input->id.bustype = BUS_HOST;
2291 input->id.product = 0x06;
2292 input->dev.parent = &device->dev;
2293 input->evbit[0] = BIT(EV_KEY);
2294 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2295 set_bit(KEY_VIDEO_NEXT, input->keybit);
2296 set_bit(KEY_VIDEO_PREV, input->keybit);
2297 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2298 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2299 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2300 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2301 set_bit(KEY_DISPLAY_OFF, input->keybit);
2302 set_bit(KEY_UNKNOWN, input->keybit);
2303
2304 error = input_register_device(input);
2305 if (error)
2306 goto err_free_input_dev;
2307
2308 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2309 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2310 video->flags.multihead ? "yes" : "no",
2311 video->flags.rom ? "yes" : "no",
2312 video->flags.post ? "yes" : "no");
2313
2314 return 0;
2315
2316 err_free_input_dev:
2317 input_free_device(input);
2318 err_stop_video:
2319 acpi_video_bus_stop_devices(video);
2320 acpi_video_bus_put_devices(video);
2321 kfree(video->attached_array);
2322 acpi_video_bus_remove_fs(device);
2323 err_free_video:
2324 kfree(video);
2325 device->driver_data = NULL;
2326
2327 return error;
2328 }
2329
2330 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2331 {
2332 struct acpi_video_bus *video = NULL;
2333
2334
2335 if (!device || !acpi_driver_data(device))
2336 return -EINVAL;
2337
2338 video = acpi_driver_data(device);
2339
2340 acpi_video_bus_stop_devices(video);
2341 acpi_video_bus_put_devices(video);
2342 acpi_video_bus_remove_fs(device);
2343
2344 input_unregister_device(video->input);
2345 kfree(video->attached_array);
2346 kfree(video);
2347
2348 return 0;
2349 }
2350
2351 static int __init intel_opregion_present(void)
2352 {
2353 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2354 struct pci_dev *dev = NULL;
2355 u32 address;
2356
2357 for_each_pci_dev(dev) {
2358 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2359 continue;
2360 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2361 continue;
2362 pci_read_config_dword(dev, 0xfc, &address);
2363 if (!address)
2364 continue;
2365 return 1;
2366 }
2367 #endif
2368 return 0;
2369 }
2370
2371 int acpi_video_register(void)
2372 {
2373 int result = 0;
2374 if (register_count) {
2375 /*
2376 * if the function of acpi_video_register is already called,
2377 * don't register the acpi_vide_bus again and return no error.
2378 */
2379 return 0;
2380 }
2381
2382 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2383 if (!acpi_video_dir)
2384 return -ENODEV;
2385
2386 result = acpi_bus_register_driver(&acpi_video_bus);
2387 if (result < 0) {
2388 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2389 return -ENODEV;
2390 }
2391
2392 /*
2393 * When the acpi_video_bus is loaded successfully, increase
2394 * the counter reference.
2395 */
2396 register_count = 1;
2397
2398 return 0;
2399 }
2400 EXPORT_SYMBOL(acpi_video_register);
2401
2402 void acpi_video_unregister(void)
2403 {
2404 if (!register_count) {
2405 /*
2406 * If the acpi video bus is already unloaded, don't
2407 * unload it again and return directly.
2408 */
2409 return;
2410 }
2411 acpi_bus_unregister_driver(&acpi_video_bus);
2412
2413 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2414
2415 register_count = 0;
2416
2417 return;
2418 }
2419 EXPORT_SYMBOL(acpi_video_unregister);
2420
2421 /*
2422 * This is kind of nasty. Hardware using Intel chipsets may require
2423 * the video opregion code to be run first in order to initialise
2424 * state before any ACPI video calls are made. To handle this we defer
2425 * registration of the video class until the opregion code has run.
2426 */
2427
2428 static int __init acpi_video_init(void)
2429 {
2430 dmi_check_system(video_dmi_table);
2431
2432 if (intel_opregion_present())
2433 return 0;
2434
2435 return acpi_video_register();
2436 }
2437
2438 static void __exit acpi_video_exit(void)
2439 {
2440 acpi_video_unregister();
2441
2442 return;
2443 }
2444
2445 module_init(acpi_video_init);
2446 module_exit(acpi_video_exit);
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