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[PATCH] Kprobes: preempt_disable/enable() simplification
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / video.c
blobe383d6109ae109c6963d43abe7ca71449e554518
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 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/types.h>
30 #include <linux/list.h>
31 #include <linux/proc_fs.h>
32 #include <linux/seq_file.h>
33
34 #include <asm/uaccess.h>
35
36 #include <acpi/acpi_bus.h>
37 #include <acpi/acpi_drivers.h>
38
39 #define ACPI_VIDEO_COMPONENT 0x08000000
40 #define ACPI_VIDEO_CLASS "video"
41 #define ACPI_VIDEO_DRIVER_NAME "ACPI Video Driver"
42 #define ACPI_VIDEO_BUS_NAME "Video Bus"
43 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
44 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
45 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
46 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
47 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
48 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
49
50 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x82
51 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x83
52 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x84
53 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x85
54 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x86
55
56 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
57 #define ACPI_VIDEO_HEAD_END (~0u)
58
59 #define _COMPONENT ACPI_VIDEO_COMPONENT
60 ACPI_MODULE_NAME("acpi_video")
61
62 MODULE_AUTHOR("Bruno Ducrot");
63 MODULE_DESCRIPTION(ACPI_VIDEO_DRIVER_NAME);
64 MODULE_LICENSE("GPL");
65
66 static int acpi_video_bus_add(struct acpi_device *device);
67 static int acpi_video_bus_remove(struct acpi_device *device, int type);
68 static int acpi_video_bus_match(struct acpi_device *device,
69 struct acpi_driver *driver);
70
71 static struct acpi_driver acpi_video_bus = {
72 .name = ACPI_VIDEO_DRIVER_NAME,
73 .class = ACPI_VIDEO_CLASS,
74 .ops = {
75 .add = acpi_video_bus_add,
76 .remove = acpi_video_bus_remove,
77 .match = acpi_video_bus_match,
78 },
79 };
80
81 struct acpi_video_bus_flags {
82 u8 multihead:1; /* can switch video heads */
83 u8 rom:1; /* can retrieve a video rom */
84 u8 post:1; /* can configure the head to */
85 u8 reserved:5;
86 };
87
88 struct acpi_video_bus_cap {
89 u8 _DOS:1; /*Enable/Disable output switching */
90 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
91 u8 _ROM:1; /*Get ROM Data */
92 u8 _GPD:1; /*Get POST Device */
93 u8 _SPD:1; /*Set POST Device */
94 u8 _VPO:1; /*Video POST Options */
95 u8 reserved:2;
96 };
97
98 struct acpi_video_device_attrib {
99 u32 display_index:4; /* A zero-based instance of the Display */
100 u32 display_port_attachment:4; /*This field differenates displays type */
101 u32 display_type:4; /*Describe the specific type in use */
102 u32 vendor_specific:4; /*Chipset Vendor Specifi */
103 u32 bios_can_detect:1; /*BIOS can detect the device */
104 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
105 the VGA device. */
106 u32 pipe_id:3; /*For VGA multiple-head devices. */
107 u32 reserved:10; /*Must be 0 */
108 u32 device_id_scheme:1; /*Device ID Scheme */
109 };
110
111 struct acpi_video_enumerated_device {
112 union {
113 u32 int_val;
114 struct acpi_video_device_attrib attrib;
115 } value;
116 struct acpi_video_device *bind_info;
117 };
118
119 struct acpi_video_bus {
120 acpi_handle handle;
121 u8 dos_setting;
122 struct acpi_video_enumerated_device *attached_array;
123 u8 attached_count;
124 struct acpi_video_bus_cap cap;
125 struct acpi_video_bus_flags flags;
126 struct semaphore sem;
127 struct list_head video_device_list;
128 struct proc_dir_entry *dir;
129 };
130
131 struct acpi_video_device_flags {
132 u8 crt:1;
133 u8 lcd:1;
134 u8 tvout:1;
135 u8 bios:1;
136 u8 unknown:1;
137 u8 reserved:3;
138 };
139
140 struct acpi_video_device_cap {
141 u8 _ADR:1; /*Return the unique ID */
142 u8 _BCL:1; /*Query list of brightness control levels supported */
143 u8 _BCM:1; /*Set the brightness level */
144 u8 _DDC:1; /*Return the EDID for this device */
145 u8 _DCS:1; /*Return status of output device */
146 u8 _DGS:1; /*Query graphics state */
147 u8 _DSS:1; /*Device state set */
148 u8 _reserved:1;
149 };
150
151 struct acpi_video_device_brightness {
152 int curr;
153 int count;
154 int *levels;
155 };
156
157 struct acpi_video_device {
158 acpi_handle handle;
159 unsigned long device_id;
160 struct acpi_video_device_flags flags;
161 struct acpi_video_device_cap cap;
162 struct list_head entry;
163 struct acpi_video_bus *video;
164 struct acpi_device *dev;
165 struct acpi_video_device_brightness *brightness;
166 };
167
168 /* bus */
169 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
170 static struct file_operations acpi_video_bus_info_fops = {
171 .open = acpi_video_bus_info_open_fs,
172 .read = seq_read,
173 .llseek = seq_lseek,
174 .release = single_release,
175 };
176
177 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
178 static struct file_operations acpi_video_bus_ROM_fops = {
179 .open = acpi_video_bus_ROM_open_fs,
180 .read = seq_read,
181 .llseek = seq_lseek,
182 .release = single_release,
183 };
184
185 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
186 struct file *file);
187 static struct file_operations acpi_video_bus_POST_info_fops = {
188 .open = acpi_video_bus_POST_info_open_fs,
189 .read = seq_read,
190 .llseek = seq_lseek,
191 .release = single_release,
192 };
193
194 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
195 static struct file_operations acpi_video_bus_POST_fops = {
196 .open = acpi_video_bus_POST_open_fs,
197 .read = seq_read,
198 .llseek = seq_lseek,
199 .release = single_release,
200 };
201
202 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
203 static struct file_operations acpi_video_bus_DOS_fops = {
204 .open = acpi_video_bus_DOS_open_fs,
205 .read = seq_read,
206 .llseek = seq_lseek,
207 .release = single_release,
208 };
209
210 /* device */
211 static int acpi_video_device_info_open_fs(struct inode *inode,
212 struct file *file);
213 static struct file_operations acpi_video_device_info_fops = {
214 .open = acpi_video_device_info_open_fs,
215 .read = seq_read,
216 .llseek = seq_lseek,
217 .release = single_release,
218 };
219
220 static int acpi_video_device_state_open_fs(struct inode *inode,
221 struct file *file);
222 static struct file_operations acpi_video_device_state_fops = {
223 .open = acpi_video_device_state_open_fs,
224 .read = seq_read,
225 .llseek = seq_lseek,
226 .release = single_release,
227 };
228
229 static int acpi_video_device_brightness_open_fs(struct inode *inode,
230 struct file *file);
231 static struct file_operations acpi_video_device_brightness_fops = {
232 .open = acpi_video_device_brightness_open_fs,
233 .read = seq_read,
234 .llseek = seq_lseek,
235 .release = single_release,
236 };
237
238 static int acpi_video_device_EDID_open_fs(struct inode *inode,
239 struct file *file);
240 static struct file_operations acpi_video_device_EDID_fops = {
241 .open = acpi_video_device_EDID_open_fs,
242 .read = seq_read,
243 .llseek = seq_lseek,
244 .release = single_release,
245 };
246
247 static char device_decode[][30] = {
248 "motherboard VGA device",
249 "PCI VGA device",
250 "AGP VGA device",
251 "UNKNOWN",
252 };
253
254 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
255 static void acpi_video_device_rebind(struct acpi_video_bus *video);
256 static void acpi_video_device_bind(struct acpi_video_bus *video,
257 struct acpi_video_device *device);
258 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
259 static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
260 static int acpi_video_get_next_level(struct acpi_video_device *device,
261 u32 level_current, u32 event);
262 static void acpi_video_switch_brightness(struct acpi_video_device *device,
263 int event);
264
265 /* --------------------------------------------------------------------------
266 Video Management
267 -------------------------------------------------------------------------- */
268
269 /* device */
270
271 static int
272 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
273 {
274 int status;
275 ACPI_FUNCTION_TRACE("acpi_video_device_query");
276 status = acpi_evaluate_integer(device->handle, "_DGS", NULL, state);
277
278 return_VALUE(status);
279 }
280
281 static int
282 acpi_video_device_get_state(struct acpi_video_device *device,
283 unsigned long *state)
284 {
285 int status;
286
287 ACPI_FUNCTION_TRACE("acpi_video_device_get_state");
288
289 status = acpi_evaluate_integer(device->handle, "_DCS", NULL, state);
290
291 return_VALUE(status);
292 }
293
294 static int
295 acpi_video_device_set_state(struct acpi_video_device *device, int state)
296 {
297 int status;
298 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
299 struct acpi_object_list args = { 1, &arg0 };
300 unsigned long ret;
301
302 ACPI_FUNCTION_TRACE("acpi_video_device_set_state");
303
304 arg0.integer.value = state;
305 status = acpi_evaluate_integer(device->handle, "_DSS", &args, &ret);
306
307 return_VALUE(status);
308 }
309
310 static int
311 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
312 union acpi_object **levels)
313 {
314 int status;
315 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
316 union acpi_object *obj;
317
318 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_query_levels");
319
320 *levels = NULL;
321
322 status = acpi_evaluate_object(device->handle, "_BCL", NULL, &buffer);
323 if (!ACPI_SUCCESS(status))
324 return_VALUE(status);
325 obj = (union acpi_object *)buffer.pointer;
326 if (!obj && (obj->type != ACPI_TYPE_PACKAGE)) {
327 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _BCL data\n"));
328 status = -EFAULT;
329 goto err;
330 }
331
332 *levels = obj;
333
334 return_VALUE(0);
335
336 err:
337 if (buffer.pointer)
338 kfree(buffer.pointer);
339
340 return_VALUE(status);
341 }
342
343 static int
344 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
345 {
346 int status;
347 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
348 struct acpi_object_list args = { 1, &arg0 };
349
350 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_set_level");
351
352 arg0.integer.value = level;
353 status = acpi_evaluate_object(device->handle, "_BCM", &args, NULL);
354
355 printk(KERN_DEBUG "set_level status: %x\n", status);
356 return_VALUE(status);
357 }
358
359 static int
360 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
361 unsigned long *level)
362 {
363 int status;
364 ACPI_FUNCTION_TRACE("acpi_video_device_lcd_get_level_current");
365
366 status = acpi_evaluate_integer(device->handle, "_BQC", NULL, level);
367
368 return_VALUE(status);
369 }
370
371 static int
372 acpi_video_device_EDID(struct acpi_video_device *device,
373 union acpi_object **edid, ssize_t length)
374 {
375 int status;
376 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
377 union acpi_object *obj;
378 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
379 struct acpi_object_list args = { 1, &arg0 };
380
381 ACPI_FUNCTION_TRACE("acpi_video_device_get_EDID");
382
383 *edid = NULL;
384
385 if (!device)
386 return_VALUE(-ENODEV);
387 if (length == 128)
388 arg0.integer.value = 1;
389 else if (length == 256)
390 arg0.integer.value = 2;
391 else
392 return_VALUE(-EINVAL);
393
394 status = acpi_evaluate_object(device->handle, "_DDC", &args, &buffer);
395 if (ACPI_FAILURE(status))
396 return_VALUE(-ENODEV);
397
398 obj = (union acpi_object *)buffer.pointer;
399
400 if (obj && obj->type == ACPI_TYPE_BUFFER)
401 *edid = obj;
402 else {
403 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DDC data\n"));
404 status = -EFAULT;
405 kfree(obj);
406 }
407
408 return_VALUE(status);
409 }
410
411 /* bus */
412
413 static int
414 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
415 {
416 int status;
417 unsigned long tmp;
418 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
419 struct acpi_object_list args = { 1, &arg0 };
420
421 ACPI_FUNCTION_TRACE("acpi_video_bus_set_POST");
422
423 arg0.integer.value = option;
424
425 status = acpi_evaluate_integer(video->handle, "_SPD", &args, &tmp);
426 if (ACPI_SUCCESS(status))
427 status = tmp ? (-EINVAL) : (AE_OK);
428
429 return_VALUE(status);
430 }
431
432 static int
433 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
434 {
435 int status;
436
437 ACPI_FUNCTION_TRACE("acpi_video_bus_get_POST");
438
439 status = acpi_evaluate_integer(video->handle, "_GPD", NULL, id);
440
441 return_VALUE(status);
442 }
443
444 static int
445 acpi_video_bus_POST_options(struct acpi_video_bus *video,
446 unsigned long *options)
447 {
448 int status;
449 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_options");
450
451 status = acpi_evaluate_integer(video->handle, "_VPO", NULL, options);
452 *options &= 3;
453
454 return_VALUE(status);
455 }
456
457 /*
458 * Arg:
459 * video : video bus device pointer
460 * bios_flag :
461 * 0. The system BIOS should NOT automatically switch(toggle)
462 * the active display output.
463 * 1. The system BIOS should automatically switch (toggle) the
464 * active display output. No swich event.
465 * 2. The _DGS value should be locked.
466 * 3. The system BIOS should not automatically switch (toggle) the
467 * active display output, but instead generate the display switch
468 * event notify code.
469 * lcd_flag :
470 * 0. The system BIOS should automatically control the brightness level
471 * of the LCD, when the power changes from AC to DC
472 * 1. The system BIOS should NOT automatically control the brightness
473 * level of the LCD, when the power changes from AC to DC.
474 * Return Value:
475 * -1 wrong arg.
476 */
477
478 static int
479 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
480 {
481 acpi_integer status = 0;
482 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
483 struct acpi_object_list args = { 1, &arg0 };
484
485 ACPI_FUNCTION_TRACE("acpi_video_bus_DOS");
486
487 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
488 status = -1;
489 goto Failed;
490 }
491 arg0.integer.value = (lcd_flag << 2) | bios_flag;
492 video->dos_setting = arg0.integer.value;
493 acpi_evaluate_object(video->handle, "_DOS", &args, NULL);
494
495 Failed:
496 return_VALUE(status);
497 }
498
499 /*
500 * Arg:
501 * device : video output device (LCD, CRT, ..)
502 *
503 * Return Value:
504 * None
505 *
506 * Find out all required AML method defined under the output
507 * device.
508 */
509
510 static void acpi_video_device_find_cap(struct acpi_video_device *device)
511 {
512 acpi_integer status;
513 acpi_handle h_dummy1;
514 int i;
515 union acpi_object *obj = NULL;
516 struct acpi_video_device_brightness *br = NULL;
517
518 ACPI_FUNCTION_TRACE("acpi_video_device_find_cap");
519
520 memset(&device->cap, 0, 4);
521
522 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ADR", &h_dummy1))) {
523 device->cap._ADR = 1;
524 }
525 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCL", &h_dummy1))) {
526 device->cap._BCL = 1;
527 }
528 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_BCM", &h_dummy1))) {
529 device->cap._BCM = 1;
530 }
531 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DDC", &h_dummy1))) {
532 device->cap._DDC = 1;
533 }
534 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DCS", &h_dummy1))) {
535 device->cap._DCS = 1;
536 }
537 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DGS", &h_dummy1))) {
538 device->cap._DGS = 1;
539 }
540 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DSS", &h_dummy1))) {
541 device->cap._DSS = 1;
542 }
543
544 status = acpi_video_device_lcd_query_levels(device, &obj);
545
546 if (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
547 int count = 0;
548 union acpi_object *o;
549
550 br = kmalloc(sizeof(*br), GFP_KERNEL);
551 if (!br) {
552 printk(KERN_ERR "can't allocate memory\n");
553 } else {
554 memset(br, 0, sizeof(*br));
555 br->levels = kmalloc(obj->package.count *
556 sizeof *(br->levels), GFP_KERNEL);
557 if (!br->levels)
558 goto out;
559
560 for (i = 0; i < obj->package.count; i++) {
561 o = (union acpi_object *)&obj->package.
562 elements[i];
563 if (o->type != ACPI_TYPE_INTEGER) {
564 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
565 "Invalid data\n"));
566 continue;
567 }
568 br->levels[count] = (u32) o->integer.value;
569 count++;
570 }
571 out:
572 if (count < 2) {
573 kfree(br->levels);
574 kfree(br);
575 } else {
576 br->count = count;
577 device->brightness = br;
578 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
579 "found %d brightness levels\n",
580 count));
581 }
582 }
583 }
584
585 kfree(obj);
586
587 return_VOID;
588 }
589
590 /*
591 * Arg:
592 * device : video output device (VGA)
593 *
594 * Return Value:
595 * None
596 *
597 * Find out all required AML method defined under the video bus device.
598 */
599
600 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
601 {
602 acpi_handle h_dummy1;
603
604 memset(&video->cap, 0, 4);
605 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOS", &h_dummy1))) {
606 video->cap._DOS = 1;
607 }
608 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_DOD", &h_dummy1))) {
609 video->cap._DOD = 1;
610 }
611 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_ROM", &h_dummy1))) {
612 video->cap._ROM = 1;
613 }
614 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_GPD", &h_dummy1))) {
615 video->cap._GPD = 1;
616 }
617 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_SPD", &h_dummy1))) {
618 video->cap._SPD = 1;
619 }
620 if (ACPI_SUCCESS(acpi_get_handle(video->handle, "_VPO", &h_dummy1))) {
621 video->cap._VPO = 1;
622 }
623 }
624
625 /*
626 * Check whether the video bus device has required AML method to
627 * support the desired features
628 */
629
630 static int acpi_video_bus_check(struct acpi_video_bus *video)
631 {
632 acpi_status status = -ENOENT;
633
634 ACPI_FUNCTION_TRACE("acpi_video_bus_check");
635
636 if (!video)
637 return_VALUE(-EINVAL);
638
639 /* Since there is no HID, CID and so on for VGA driver, we have
640 * to check well known required nodes.
641 */
642
643 /* Does this device able to support video switching ? */
644 if (video->cap._DOS) {
645 video->flags.multihead = 1;
646 status = 0;
647 }
648
649 /* Does this device able to retrieve a retrieve a video ROM ? */
650 if (video->cap._ROM) {
651 video->flags.rom = 1;
652 status = 0;
653 }
654
655 /* Does this device able to configure which video device to POST ? */
656 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
657 video->flags.post = 1;
658 status = 0;
659 }
660
661 return_VALUE(status);
662 }
663
664 /* --------------------------------------------------------------------------
665 FS Interface (/proc)
666 -------------------------------------------------------------------------- */
667
668 static struct proc_dir_entry *acpi_video_dir;
669
670 /* video devices */
671
672 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
673 {
674 struct acpi_video_device *dev =
675 (struct acpi_video_device *)seq->private;
676
677 ACPI_FUNCTION_TRACE("acpi_video_device_info_seq_show");
678
679 if (!dev)
680 goto end;
681
682 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
683 seq_printf(seq, "type: ");
684 if (dev->flags.crt)
685 seq_printf(seq, "CRT\n");
686 else if (dev->flags.lcd)
687 seq_printf(seq, "LCD\n");
688 else if (dev->flags.tvout)
689 seq_printf(seq, "TVOUT\n");
690 else
691 seq_printf(seq, "UNKNOWN\n");
692
693 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
694
695 end:
696 return_VALUE(0);
697 }
698
699 static int
700 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
701 {
702 return single_open(file, acpi_video_device_info_seq_show,
703 PDE(inode)->data);
704 }
705
706 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
707 {
708 int status;
709 struct acpi_video_device *dev =
710 (struct acpi_video_device *)seq->private;
711 unsigned long state;
712
713 ACPI_FUNCTION_TRACE("acpi_video_device_state_seq_show");
714
715 if (!dev)
716 goto end;
717
718 status = acpi_video_device_get_state(dev, &state);
719 seq_printf(seq, "state: ");
720 if (ACPI_SUCCESS(status))
721 seq_printf(seq, "0x%02lx\n", state);
722 else
723 seq_printf(seq, "<not supported>\n");
724
725 status = acpi_video_device_query(dev, &state);
726 seq_printf(seq, "query: ");
727 if (ACPI_SUCCESS(status))
728 seq_printf(seq, "0x%02lx\n", state);
729 else
730 seq_printf(seq, "<not supported>\n");
731
732 end:
733 return_VALUE(0);
734 }
735
736 static int
737 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
738 {
739 return single_open(file, acpi_video_device_state_seq_show,
740 PDE(inode)->data);
741 }
742
743 static ssize_t
744 acpi_video_device_write_state(struct file *file,
745 const char __user * buffer,
746 size_t count, loff_t * data)
747 {
748 int status;
749 struct seq_file *m = (struct seq_file *)file->private_data;
750 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
751 char str[12] = { 0 };
752 u32 state = 0;
753
754 ACPI_FUNCTION_TRACE("acpi_video_device_write_state");
755
756 if (!dev || count + 1 > sizeof str)
757 return_VALUE(-EINVAL);
758
759 if (copy_from_user(str, buffer, count))
760 return_VALUE(-EFAULT);
761
762 str[count] = 0;
763 state = simple_strtoul(str, NULL, 0);
764 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
765
766 status = acpi_video_device_set_state(dev, state);
767
768 if (status)
769 return_VALUE(-EFAULT);
770
771 return_VALUE(count);
772 }
773
774 static int
775 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
776 {
777 struct acpi_video_device *dev =
778 (struct acpi_video_device *)seq->private;
779 int i;
780
781 ACPI_FUNCTION_TRACE("acpi_video_device_brightness_seq_show");
782
783 if (!dev || !dev->brightness) {
784 seq_printf(seq, "<not supported>\n");
785 return_VALUE(0);
786 }
787
788 seq_printf(seq, "levels: ");
789 for (i = 0; i < dev->brightness->count; i++)
790 seq_printf(seq, " %d", dev->brightness->levels[i]);
791 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
792
793 return_VALUE(0);
794 }
795
796 static int
797 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
798 {
799 return single_open(file, acpi_video_device_brightness_seq_show,
800 PDE(inode)->data);
801 }
802
803 static ssize_t
804 acpi_video_device_write_brightness(struct file *file,
805 const char __user * buffer,
806 size_t count, loff_t * data)
807 {
808 struct seq_file *m = (struct seq_file *)file->private_data;
809 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
810 char str[4] = { 0 };
811 unsigned int level = 0;
812 int i;
813
814 ACPI_FUNCTION_TRACE("acpi_video_device_write_brightness");
815
816 if (!dev || count + 1 > sizeof str)
817 return_VALUE(-EINVAL);
818
819 if (copy_from_user(str, buffer, count))
820 return_VALUE(-EFAULT);
821
822 str[count] = 0;
823 level = simple_strtoul(str, NULL, 0);
824
825 if (level > 100)
826 return_VALUE(-EFAULT);
827
828 /* validate though the list of available levels */
829 for (i = 0; i < dev->brightness->count; i++)
830 if (level == dev->brightness->levels[i]) {
831 if (ACPI_SUCCESS
832 (acpi_video_device_lcd_set_level(dev, level)))
833 dev->brightness->curr = level;
834 break;
835 }
836
837 return_VALUE(count);
838 }
839
840 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
841 {
842 struct acpi_video_device *dev =
843 (struct acpi_video_device *)seq->private;
844 int status;
845 int i;
846 union acpi_object *edid = NULL;
847
848 ACPI_FUNCTION_TRACE("acpi_video_device_EDID_seq_show");
849
850 if (!dev)
851 goto out;
852
853 status = acpi_video_device_EDID(dev, &edid, 128);
854 if (ACPI_FAILURE(status)) {
855 status = acpi_video_device_EDID(dev, &edid, 256);
856 }
857
858 if (ACPI_FAILURE(status)) {
859 goto out;
860 }
861
862 if (edid && edid->type == ACPI_TYPE_BUFFER) {
863 for (i = 0; i < edid->buffer.length; i++)
864 seq_putc(seq, edid->buffer.pointer[i]);
865 }
866
867 out:
868 if (!edid)
869 seq_printf(seq, "<not supported>\n");
870 else
871 kfree(edid);
872
873 return_VALUE(0);
874 }
875
876 static int
877 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
878 {
879 return single_open(file, acpi_video_device_EDID_seq_show,
880 PDE(inode)->data);
881 }
882
883 static int acpi_video_device_add_fs(struct acpi_device *device)
884 {
885 struct proc_dir_entry *entry = NULL;
886 struct acpi_video_device *vid_dev;
887
888 ACPI_FUNCTION_TRACE("acpi_video_device_add_fs");
889
890 if (!device)
891 return_VALUE(-ENODEV);
892
893 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
894 if (!vid_dev)
895 return_VALUE(-ENODEV);
896
897 if (!acpi_device_dir(device)) {
898 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
899 vid_dev->video->dir);
900 if (!acpi_device_dir(device))
901 return_VALUE(-ENODEV);
902 acpi_device_dir(device)->owner = THIS_MODULE;
903 }
904
905 /* 'info' [R] */
906 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
907 if (!entry)
908 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
909 "Unable to create 'info' fs entry\n"));
910 else {
911 entry->proc_fops = &acpi_video_device_info_fops;
912 entry->data = acpi_driver_data(device);
913 entry->owner = THIS_MODULE;
914 }
915
916 /* 'state' [R/W] */
917 entry =
918 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
919 acpi_device_dir(device));
920 if (!entry)
921 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
922 "Unable to create 'state' fs entry\n"));
923 else {
924 entry->proc_fops = &acpi_video_device_state_fops;
925 entry->proc_fops->write = acpi_video_device_write_state;
926 entry->data = acpi_driver_data(device);
927 entry->owner = THIS_MODULE;
928 }
929
930 /* 'brightness' [R/W] */
931 entry =
932 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
933 acpi_device_dir(device));
934 if (!entry)
935 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
936 "Unable to create 'brightness' fs entry\n"));
937 else {
938 entry->proc_fops = &acpi_video_device_brightness_fops;
939 entry->proc_fops->write = acpi_video_device_write_brightness;
940 entry->data = acpi_driver_data(device);
941 entry->owner = THIS_MODULE;
942 }
943
944 /* 'EDID' [R] */
945 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
946 if (!entry)
947 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
948 "Unable to create 'brightness' fs entry\n"));
949 else {
950 entry->proc_fops = &acpi_video_device_EDID_fops;
951 entry->data = acpi_driver_data(device);
952 entry->owner = THIS_MODULE;
953 }
954
955 return_VALUE(0);
956 }
957
958 static int acpi_video_device_remove_fs(struct acpi_device *device)
959 {
960 struct acpi_video_device *vid_dev;
961 ACPI_FUNCTION_TRACE("acpi_video_device_remove_fs");
962
963 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
964 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
965 return_VALUE(-ENODEV);
966
967 if (acpi_device_dir(device)) {
968 remove_proc_entry("info", acpi_device_dir(device));
969 remove_proc_entry("state", acpi_device_dir(device));
970 remove_proc_entry("brightness", acpi_device_dir(device));
971 remove_proc_entry("EDID", acpi_device_dir(device));
972 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
973 acpi_device_dir(device) = NULL;
974 }
975
976 return_VALUE(0);
977 }
978
979 /* video bus */
980 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
981 {
982 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
983
984 ACPI_FUNCTION_TRACE("acpi_video_bus_info_seq_show");
985
986 if (!video)
987 goto end;
988
989 seq_printf(seq, "Switching heads: %s\n",
990 video->flags.multihead ? "yes" : "no");
991 seq_printf(seq, "Video ROM: %s\n",
992 video->flags.rom ? "yes" : "no");
993 seq_printf(seq, "Device to be POSTed on boot: %s\n",
994 video->flags.post ? "yes" : "no");
995
996 end:
997 return_VALUE(0);
998 }
999
1000 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1001 {
1002 return single_open(file, acpi_video_bus_info_seq_show,
1003 PDE(inode)->data);
1004 }
1005
1006 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1007 {
1008 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1009
1010 ACPI_FUNCTION_TRACE("acpi_video_bus_ROM_seq_show");
1011
1012 if (!video)
1013 goto end;
1014
1015 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1016 seq_printf(seq, "<TODO>\n");
1017
1018 end:
1019 return_VALUE(0);
1020 }
1021
1022 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1023 {
1024 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1025 }
1026
1027 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1028 {
1029 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1030 unsigned long options;
1031 int status;
1032
1033 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_info_seq_show");
1034
1035 if (!video)
1036 goto end;
1037
1038 status = acpi_video_bus_POST_options(video, &options);
1039 if (ACPI_SUCCESS(status)) {
1040 if (!(options & 1)) {
1041 printk(KERN_WARNING PREFIX
1042 "The motherboard VGA device is not listed as a possible POST device.\n");
1043 printk(KERN_WARNING PREFIX
1044 "This indicate a BIOS bug. Please contact the manufacturer.\n");
1045 }
1046 printk("%lx\n", options);
1047 seq_printf(seq, "can POST: <intgrated video>");
1048 if (options & 2)
1049 seq_printf(seq, " <PCI video>");
1050 if (options & 4)
1051 seq_printf(seq, " <AGP video>");
1052 seq_putc(seq, '\n');
1053 } else
1054 seq_printf(seq, "<not supported>\n");
1055 end:
1056 return_VALUE(0);
1057 }
1058
1059 static int
1060 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1061 {
1062 return single_open(file, acpi_video_bus_POST_info_seq_show,
1063 PDE(inode)->data);
1064 }
1065
1066 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1067 {
1068 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1069 int status;
1070 unsigned long id;
1071
1072 ACPI_FUNCTION_TRACE("acpi_video_bus_POST_seq_show");
1073
1074 if (!video)
1075 goto end;
1076
1077 status = acpi_video_bus_get_POST(video, &id);
1078 if (!ACPI_SUCCESS(status)) {
1079 seq_printf(seq, "<not supported>\n");
1080 goto end;
1081 }
1082 seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
1083
1084 end:
1085 return_VALUE(0);
1086 }
1087
1088 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1089 {
1090 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1091
1092 ACPI_FUNCTION_TRACE("acpi_video_bus_DOS_seq_show");
1093
1094 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1095
1096 return_VALUE(0);
1097 }
1098
1099 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1100 {
1101 return single_open(file, acpi_video_bus_POST_seq_show,
1102 PDE(inode)->data);
1103 }
1104
1105 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1106 {
1107 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1108 }
1109
1110 static ssize_t
1111 acpi_video_bus_write_POST(struct file *file,
1112 const char __user * buffer,
1113 size_t count, loff_t * data)
1114 {
1115 int status;
1116 struct seq_file *m = (struct seq_file *)file->private_data;
1117 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1118 char str[12] = { 0 };
1119 unsigned long opt, options;
1120
1121 ACPI_FUNCTION_TRACE("acpi_video_bus_write_POST");
1122
1123 if (!video || count + 1 > sizeof str)
1124 return_VALUE(-EINVAL);
1125
1126 status = acpi_video_bus_POST_options(video, &options);
1127 if (!ACPI_SUCCESS(status))
1128 return_VALUE(-EINVAL);
1129
1130 if (copy_from_user(str, buffer, count))
1131 return_VALUE(-EFAULT);
1132
1133 str[count] = 0;
1134 opt = strtoul(str, NULL, 0);
1135 if (opt > 3)
1136 return_VALUE(-EFAULT);
1137
1138 /* just in case an OEM 'forget' the motherboard... */
1139 options |= 1;
1140
1141 if (options & (1ul << opt)) {
1142 status = acpi_video_bus_set_POST(video, opt);
1143 if (!ACPI_SUCCESS(status))
1144 return_VALUE(-EFAULT);
1145
1146 }
1147
1148 return_VALUE(count);
1149 }
1150
1151 static ssize_t
1152 acpi_video_bus_write_DOS(struct file *file,
1153 const char __user * buffer,
1154 size_t count, loff_t * data)
1155 {
1156 int status;
1157 struct seq_file *m = (struct seq_file *)file->private_data;
1158 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1159 char str[12] = { 0 };
1160 unsigned long opt;
1161
1162 ACPI_FUNCTION_TRACE("acpi_video_bus_write_DOS");
1163
1164 if (!video || count + 1 > sizeof str)
1165 return_VALUE(-EINVAL);
1166
1167 if (copy_from_user(str, buffer, count))
1168 return_VALUE(-EFAULT);
1169
1170 str[count] = 0;
1171 opt = strtoul(str, NULL, 0);
1172 if (opt > 7)
1173 return_VALUE(-EFAULT);
1174
1175 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1176
1177 if (!ACPI_SUCCESS(status))
1178 return_VALUE(-EFAULT);
1179
1180 return_VALUE(count);
1181 }
1182
1183 static int acpi_video_bus_add_fs(struct acpi_device *device)
1184 {
1185 struct proc_dir_entry *entry = NULL;
1186 struct acpi_video_bus *video;
1187
1188 ACPI_FUNCTION_TRACE("acpi_video_bus_add_fs");
1189
1190 video = (struct acpi_video_bus *)acpi_driver_data(device);
1191
1192 if (!acpi_device_dir(device)) {
1193 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1194 acpi_video_dir);
1195 if (!acpi_device_dir(device))
1196 return_VALUE(-ENODEV);
1197 video->dir = acpi_device_dir(device);
1198 acpi_device_dir(device)->owner = THIS_MODULE;
1199 }
1200
1201 /* 'info' [R] */
1202 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1203 if (!entry)
1204 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1205 "Unable to create 'info' fs entry\n"));
1206 else {
1207 entry->proc_fops = &acpi_video_bus_info_fops;
1208 entry->data = acpi_driver_data(device);
1209 entry->owner = THIS_MODULE;
1210 }
1211
1212 /* 'ROM' [R] */
1213 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1214 if (!entry)
1215 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1216 "Unable to create 'ROM' fs entry\n"));
1217 else {
1218 entry->proc_fops = &acpi_video_bus_ROM_fops;
1219 entry->data = acpi_driver_data(device);
1220 entry->owner = THIS_MODULE;
1221 }
1222
1223 /* 'POST_info' [R] */
1224 entry =
1225 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1226 if (!entry)
1227 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1228 "Unable to create 'POST_info' fs entry\n"));
1229 else {
1230 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1231 entry->data = acpi_driver_data(device);
1232 entry->owner = THIS_MODULE;
1233 }
1234
1235 /* 'POST' [R/W] */
1236 entry =
1237 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1238 acpi_device_dir(device));
1239 if (!entry)
1240 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1241 "Unable to create 'POST' fs entry\n"));
1242 else {
1243 entry->proc_fops = &acpi_video_bus_POST_fops;
1244 entry->proc_fops->write = acpi_video_bus_write_POST;
1245 entry->data = acpi_driver_data(device);
1246 entry->owner = THIS_MODULE;
1247 }
1248
1249 /* 'DOS' [R/W] */
1250 entry =
1251 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1252 acpi_device_dir(device));
1253 if (!entry)
1254 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1255 "Unable to create 'DOS' fs entry\n"));
1256 else {
1257 entry->proc_fops = &acpi_video_bus_DOS_fops;
1258 entry->proc_fops->write = acpi_video_bus_write_DOS;
1259 entry->data = acpi_driver_data(device);
1260 entry->owner = THIS_MODULE;
1261 }
1262
1263 return_VALUE(0);
1264 }
1265
1266 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1267 {
1268 struct acpi_video_bus *video;
1269
1270 ACPI_FUNCTION_TRACE("acpi_video_bus_remove_fs");
1271
1272 video = (struct acpi_video_bus *)acpi_driver_data(device);
1273
1274 if (acpi_device_dir(device)) {
1275 remove_proc_entry("info", acpi_device_dir(device));
1276 remove_proc_entry("ROM", acpi_device_dir(device));
1277 remove_proc_entry("POST_info", acpi_device_dir(device));
1278 remove_proc_entry("POST", acpi_device_dir(device));
1279 remove_proc_entry("DOS", acpi_device_dir(device));
1280 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1281 acpi_device_dir(device) = NULL;
1282 }
1283
1284 return_VALUE(0);
1285 }
1286
1287 /* --------------------------------------------------------------------------
1288 Driver Interface
1289 -------------------------------------------------------------------------- */
1290
1291 /* device interface */
1292
1293 static int
1294 acpi_video_bus_get_one_device(struct acpi_device *device,
1295 struct acpi_video_bus *video)
1296 {
1297 unsigned long device_id;
1298 int status, result;
1299 struct acpi_video_device *data;
1300
1301 ACPI_FUNCTION_TRACE("acpi_video_bus_get_one_device");
1302
1303 if (!device || !video)
1304 return_VALUE(-EINVAL);
1305
1306 status =
1307 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1308 if (ACPI_SUCCESS(status)) {
1309
1310 data = kmalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1311 if (!data)
1312 return_VALUE(-ENOMEM);
1313
1314 memset(data, 0, sizeof(struct acpi_video_device));
1315
1316 data->handle = device->handle;
1317 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1318 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1319 acpi_driver_data(device) = data;
1320
1321 data->device_id = device_id;
1322 data->video = video;
1323 data->dev = device;
1324
1325 switch (device_id & 0xffff) {
1326 case 0x0100:
1327 data->flags.crt = 1;
1328 break;
1329 case 0x0400:
1330 data->flags.lcd = 1;
1331 break;
1332 case 0x0200:
1333 data->flags.tvout = 1;
1334 break;
1335 default:
1336 data->flags.unknown = 1;
1337 break;
1338 }
1339
1340 acpi_video_device_bind(video, data);
1341 acpi_video_device_find_cap(data);
1342
1343 status = acpi_install_notify_handler(data->handle,
1344 ACPI_DEVICE_NOTIFY,
1345 acpi_video_device_notify,
1346 data);
1347 if (ACPI_FAILURE(status)) {
1348 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1349 "Error installing notify handler\n"));
1350 result = -ENODEV;
1351 goto end;
1352 }
1353
1354 down(&video->sem);
1355 list_add_tail(&data->entry, &video->video_device_list);
1356 up(&video->sem);
1357
1358 acpi_video_device_add_fs(device);
1359
1360 return_VALUE(0);
1361 }
1362
1363 end:
1364 return_VALUE(-ENOENT);
1365 }
1366
1367 /*
1368 * Arg:
1369 * video : video bus device
1370 *
1371 * Return:
1372 * none
1373 *
1374 * Enumerate the video device list of the video bus,
1375 * bind the ids with the corresponding video devices
1376 * under the video bus.
1377 */
1378
1379 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1380 {
1381 struct list_head *node, *next;
1382 list_for_each_safe(node, next, &video->video_device_list) {
1383 struct acpi_video_device *dev =
1384 container_of(node, struct acpi_video_device, entry);
1385 acpi_video_device_bind(video, dev);
1386 }
1387 }
1388
1389 /*
1390 * Arg:
1391 * video : video bus device
1392 * device : video output device under the video
1393 * bus
1394 *
1395 * Return:
1396 * none
1397 *
1398 * Bind the ids with the corresponding video devices
1399 * under the video bus.
1400 */
1401
1402 static void
1403 acpi_video_device_bind(struct acpi_video_bus *video,
1404 struct acpi_video_device *device)
1405 {
1406 int i;
1407 ACPI_FUNCTION_TRACE("acpi_video_device_bind");
1408
1409 #define IDS_VAL(i) video->attached_array[i].value.int_val
1410 #define IDS_BIND(i) video->attached_array[i].bind_info
1411
1412 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1413 i < video->attached_count; i++) {
1414 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1415 IDS_BIND(i) = device;
1416 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1417 }
1418 }
1419 #undef IDS_VAL
1420 #undef IDS_BIND
1421 }
1422
1423 /*
1424 * Arg:
1425 * video : video bus device
1426 *
1427 * Return:
1428 * < 0 : error
1429 *
1430 * Call _DOD to enumerate all devices attached to display adapter
1431 *
1432 */
1433
1434 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1435 {
1436 int status;
1437 int count;
1438 int i;
1439 struct acpi_video_enumerated_device *active_device_list;
1440 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1441 union acpi_object *dod = NULL;
1442 union acpi_object *obj;
1443
1444 ACPI_FUNCTION_TRACE("acpi_video_device_enumerate");
1445
1446 status = acpi_evaluate_object(video->handle, "_DOD", NULL, &buffer);
1447 if (!ACPI_SUCCESS(status)) {
1448 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _DOD\n"));
1449 return_VALUE(status);
1450 }
1451
1452 dod = (union acpi_object *)buffer.pointer;
1453 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1454 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _DOD data\n"));
1455 status = -EFAULT;
1456 goto out;
1457 }
1458
1459 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1460 dod->package.count));
1461
1462 active_device_list = kmalloc((1 +
1463 dod->package.count) *
1464 sizeof(struct
1465 acpi_video_enumerated_device),
1466 GFP_KERNEL);
1467
1468 if (!active_device_list) {
1469 status = -ENOMEM;
1470 goto out;
1471 }
1472
1473 count = 0;
1474 for (i = 0; i < dod->package.count; i++) {
1475 obj = (union acpi_object *)&dod->package.elements[i];
1476
1477 if (obj->type != ACPI_TYPE_INTEGER) {
1478 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1479 "Invalid _DOD data\n"));
1480 active_device_list[i].value.int_val =
1481 ACPI_VIDEO_HEAD_INVALID;
1482 }
1483 active_device_list[i].value.int_val = obj->integer.value;
1484 active_device_list[i].bind_info = NULL;
1485 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1486 (int)obj->integer.value));
1487 count++;
1488 }
1489 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1490
1491 if (video->attached_array)
1492 kfree(video->attached_array);
1493
1494 video->attached_array = active_device_list;
1495 video->attached_count = count;
1496 out:
1497 acpi_os_free(buffer.pointer);
1498 return_VALUE(status);
1499 }
1500
1501 /*
1502 * Arg:
1503 * video : video bus device
1504 * event : Nontify Event
1505 *
1506 * Return:
1507 * < 0 : error
1508 *
1509 * 1. Find out the current active output device.
1510 * 2. Identify the next output device to switch
1511 * 3. call _DSS to do actual switch.
1512 */
1513
1514 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1515 {
1516 struct list_head *node, *next;
1517 struct acpi_video_device *dev = NULL;
1518 struct acpi_video_device *dev_next = NULL;
1519 struct acpi_video_device *dev_prev = NULL;
1520 unsigned long state;
1521 int status = 0;
1522
1523 ACPI_FUNCTION_TRACE("acpi_video_switch_output");
1524
1525 list_for_each_safe(node, next, &video->video_device_list) {
1526 dev = container_of(node, struct acpi_video_device, entry);
1527 status = acpi_video_device_get_state(dev, &state);
1528 if (state & 0x2) {
1529 dev_next =
1530 container_of(node->next, struct acpi_video_device,
1531 entry);
1532 dev_prev =
1533 container_of(node->prev, struct acpi_video_device,
1534 entry);
1535 goto out;
1536 }
1537 }
1538 dev_next = container_of(node->next, struct acpi_video_device, entry);
1539 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1540 out:
1541 switch (event) {
1542 case ACPI_VIDEO_NOTIFY_CYCLE:
1543 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1544 acpi_video_device_set_state(dev, 0);
1545 acpi_video_device_set_state(dev_next, 0x80000001);
1546 break;
1547 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1548 acpi_video_device_set_state(dev, 0);
1549 acpi_video_device_set_state(dev_prev, 0x80000001);
1550 default:
1551 break;
1552 }
1553
1554 return_VALUE(status);
1555 }
1556
1557 static int
1558 acpi_video_get_next_level(struct acpi_video_device *device,
1559 u32 level_current, u32 event)
1560 {
1561 /*Fix me */
1562 return level_current;
1563 }
1564
1565 static void
1566 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1567 {
1568 unsigned long level_current, level_next;
1569 acpi_video_device_lcd_get_level_current(device, &level_current);
1570 level_next = acpi_video_get_next_level(device, level_current, event);
1571 acpi_video_device_lcd_set_level(device, level_next);
1572 }
1573
1574 static int
1575 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1576 struct acpi_device *device)
1577 {
1578 int status = 0;
1579 struct list_head *node, *next;
1580
1581 ACPI_FUNCTION_TRACE("acpi_video_get_devices");
1582
1583 acpi_video_device_enumerate(video);
1584
1585 list_for_each_safe(node, next, &device->children) {
1586 struct acpi_device *dev =
1587 list_entry(node, struct acpi_device, node);
1588
1589 if (!dev)
1590 continue;
1591
1592 status = acpi_video_bus_get_one_device(dev, video);
1593 if (ACPI_FAILURE(status)) {
1594 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1595 "Cant attach device\n"));
1596 continue;
1597 }
1598
1599 }
1600 return_VALUE(status);
1601 }
1602
1603 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1604 {
1605 acpi_status status;
1606 struct acpi_video_bus *video;
1607
1608 ACPI_FUNCTION_TRACE("acpi_video_bus_put_one_device");
1609
1610 if (!device || !device->video)
1611 return_VALUE(-ENOENT);
1612
1613 video = device->video;
1614
1615 down(&video->sem);
1616 list_del(&device->entry);
1617 up(&video->sem);
1618 acpi_video_device_remove_fs(device->dev);
1619
1620 status = acpi_remove_notify_handler(device->handle,
1621 ACPI_DEVICE_NOTIFY,
1622 acpi_video_device_notify);
1623 if (ACPI_FAILURE(status))
1624 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1625 "Error removing notify handler\n"));
1626
1627 return_VALUE(0);
1628 }
1629
1630 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1631 {
1632 int status;
1633 struct list_head *node, *next;
1634
1635 ACPI_FUNCTION_TRACE("acpi_video_bus_put_devices");
1636
1637 list_for_each_safe(node, next, &video->video_device_list) {
1638 struct acpi_video_device *data =
1639 list_entry(node, struct acpi_video_device, entry);
1640 if (!data)
1641 continue;
1642
1643 status = acpi_video_bus_put_one_device(data);
1644 if (ACPI_FAILURE(status))
1645 printk(KERN_WARNING PREFIX
1646 "hhuuhhuu bug in acpi video driver.\n");
1647
1648 if (data->brightness)
1649 kfree(data->brightness);
1650
1651 kfree(data);
1652 }
1653
1654 return_VALUE(0);
1655 }
1656
1657 /* acpi_video interface */
1658
1659 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1660 {
1661 return acpi_video_bus_DOS(video, 1, 0);
1662 }
1663
1664 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1665 {
1666 return acpi_video_bus_DOS(video, 0, 1);
1667 }
1668
1669 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1670 {
1671 struct acpi_video_bus *video = (struct acpi_video_bus *)data;
1672 struct acpi_device *device = NULL;
1673
1674 ACPI_FUNCTION_TRACE("acpi_video_bus_notify");
1675 printk("video bus notify\n");
1676
1677 if (!video)
1678 return_VOID;
1679
1680 if (acpi_bus_get_device(handle, &device))
1681 return_VOID;
1682
1683 switch (event) {
1684 case ACPI_VIDEO_NOTIFY_SWITCH: /* User request that a switch occur,
1685 * most likely via hotkey. */
1686 acpi_bus_generate_event(device, event, 0);
1687 break;
1688
1689 case ACPI_VIDEO_NOTIFY_PROBE: /* User plug or remove a video
1690 * connector. */
1691 acpi_video_device_enumerate(video);
1692 acpi_video_device_rebind(video);
1693 acpi_video_switch_output(video, event);
1694 acpi_bus_generate_event(device, event, 0);
1695 break;
1696
1697 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1698 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1699 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1700 acpi_video_switch_output(video, event);
1701 acpi_bus_generate_event(device, event, 0);
1702 break;
1703
1704 default:
1705 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1706 "Unsupported event [0x%x]\n", event));
1707 break;
1708 }
1709
1710 return_VOID;
1711 }
1712
1713 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1714 {
1715 struct acpi_video_device *video_device =
1716 (struct acpi_video_device *)data;
1717 struct acpi_device *device = NULL;
1718
1719 ACPI_FUNCTION_TRACE("acpi_video_device_notify");
1720
1721 printk("video device notify\n");
1722 if (!video_device)
1723 return_VOID;
1724
1725 if (acpi_bus_get_device(handle, &device))
1726 return_VOID;
1727
1728 switch (event) {
1729 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1730 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1731 acpi_bus_generate_event(device, event, 0);
1732 break;
1733 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1734 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1735 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1736 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1737 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1738 acpi_video_switch_brightness(video_device, event);
1739 acpi_bus_generate_event(device, event, 0);
1740 break;
1741 default:
1742 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1743 "Unsupported event [0x%x]\n", event));
1744 break;
1745 }
1746 return_VOID;
1747 }
1748
1749 static int acpi_video_bus_add(struct acpi_device *device)
1750 {
1751 int result = 0;
1752 acpi_status status = 0;
1753 struct acpi_video_bus *video = NULL;
1754
1755 ACPI_FUNCTION_TRACE("acpi_video_bus_add");
1756
1757 if (!device)
1758 return_VALUE(-EINVAL);
1759
1760 video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1761 if (!video)
1762 return_VALUE(-ENOMEM);
1763 memset(video, 0, sizeof(struct acpi_video_bus));
1764
1765 video->handle = device->handle;
1766 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1767 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1768 acpi_driver_data(device) = video;
1769
1770 acpi_video_bus_find_cap(video);
1771 result = acpi_video_bus_check(video);
1772 if (result)
1773 goto end;
1774
1775 result = acpi_video_bus_add_fs(device);
1776 if (result)
1777 goto end;
1778
1779 init_MUTEX(&video->sem);
1780 INIT_LIST_HEAD(&video->video_device_list);
1781
1782 acpi_video_bus_get_devices(video, device);
1783 acpi_video_bus_start_devices(video);
1784
1785 status = acpi_install_notify_handler(video->handle,
1786 ACPI_DEVICE_NOTIFY,
1787 acpi_video_bus_notify, video);
1788 if (ACPI_FAILURE(status)) {
1789 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1790 "Error installing notify handler\n"));
1791 result = -ENODEV;
1792 goto end;
1793 }
1794
1795 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1796 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1797 video->flags.multihead ? "yes" : "no",
1798 video->flags.rom ? "yes" : "no",
1799 video->flags.post ? "yes" : "no");
1800
1801 end:
1802 if (result) {
1803 acpi_video_bus_remove_fs(device);
1804 kfree(video);
1805 }
1806
1807 return_VALUE(result);
1808 }
1809
1810 static int acpi_video_bus_remove(struct acpi_device *device, int type)
1811 {
1812 acpi_status status = 0;
1813 struct acpi_video_bus *video = NULL;
1814
1815 ACPI_FUNCTION_TRACE("acpi_video_bus_remove");
1816
1817 if (!device || !acpi_driver_data(device))
1818 return_VALUE(-EINVAL);
1819
1820 video = (struct acpi_video_bus *)acpi_driver_data(device);
1821
1822 acpi_video_bus_stop_devices(video);
1823
1824 status = acpi_remove_notify_handler(video->handle,
1825 ACPI_DEVICE_NOTIFY,
1826 acpi_video_bus_notify);
1827 if (ACPI_FAILURE(status))
1828 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1829 "Error removing notify handler\n"));
1830
1831 acpi_video_bus_put_devices(video);
1832 acpi_video_bus_remove_fs(device);
1833
1834 if (video->attached_array)
1835 kfree(video->attached_array);
1836 kfree(video);
1837
1838 return_VALUE(0);
1839 }
1840
1841 static int
1842 acpi_video_bus_match(struct acpi_device *device, struct acpi_driver *driver)
1843 {
1844 acpi_handle h_dummy1;
1845 acpi_handle h_dummy2;
1846 acpi_handle h_dummy3;
1847
1848 ACPI_FUNCTION_TRACE("acpi_video_bus_match");
1849
1850 if (!device || !driver)
1851 return_VALUE(-EINVAL);
1852
1853 /* Since there is no HID, CID for ACPI Video drivers, we have
1854 * to check well known required nodes for each feature we support.
1855 */
1856
1857 /* Does this device able to support video switching ? */
1858 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
1859 ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
1860 return_VALUE(0);
1861
1862 /* Does this device able to retrieve a video ROM ? */
1863 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
1864 return_VALUE(0);
1865
1866 /* Does this device able to configure which video head to be POSTed ? */
1867 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
1868 ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
1869 ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
1870 return_VALUE(0);
1871
1872 return_VALUE(-ENODEV);
1873 }
1874
1875 static int __init acpi_video_init(void)
1876 {
1877 int result = 0;
1878
1879 ACPI_FUNCTION_TRACE("acpi_video_init");
1880
1881 /*
1882 acpi_dbg_level = 0xFFFFFFFF;
1883 acpi_dbg_layer = 0x08000000;
1884 */
1885
1886 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1887 if (!acpi_video_dir)
1888 return_VALUE(-ENODEV);
1889 acpi_video_dir->owner = THIS_MODULE;
1890
1891 result = acpi_bus_register_driver(&acpi_video_bus);
1892 if (result < 0) {
1893 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1894 return_VALUE(-ENODEV);
1895 }
1896
1897 return_VALUE(0);
1898 }
1899
1900 static void __exit acpi_video_exit(void)
1901 {
1902 ACPI_FUNCTION_TRACE("acpi_video_exit");
1903
1904 acpi_bus_unregister_driver(&acpi_video_bus);
1905
1906 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1907
1908 return_VOID;
1909 }
1910
1911 module_init(acpi_video_init);
1912 module_exit(acpi_video_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree