ia64/linux-2.6.18-xen.hg

view drivers/acpi/video.c @ 912:dd42cdb0ab89

[IA64] Build blktap2 driver by default in x86 builds.

add CONFIG_XEN_BLKDEV_TAP2=y to buildconfigs/linux-defconfig_xen_ia64.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Mon Jun 29 12:09:16 2009 +0900 (2009-06-29)
parents 831230e53067
children
line source
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 */
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>
34 #include <asm/uaccess.h>
36 #include <acpi/acpi_bus.h>
37 #include <acpi/acpi_drivers.h>
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
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
56 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
57 #define ACPI_VIDEO_HEAD_END (~0u)
59 #define _COMPONENT ACPI_VIDEO_COMPONENT
60 ACPI_MODULE_NAME("acpi_video")
62 MODULE_AUTHOR("Bruno Ducrot");
63 MODULE_DESCRIPTION(ACPI_VIDEO_DRIVER_NAME);
64 MODULE_LICENSE("GPL");
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);
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 };
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 };
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 };
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 };
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 };
119 struct acpi_video_bus {
120 struct acpi_device *device;
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 };
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 };
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 };
151 struct acpi_video_device_brightness {
152 int curr;
153 int count;
154 int *levels;
155 };
157 struct acpi_video_device {
158 unsigned long device_id;
159 struct acpi_video_device_flags flags;
160 struct acpi_video_device_cap cap;
161 struct list_head entry;
162 struct acpi_video_bus *video;
163 struct acpi_device *dev;
164 struct acpi_video_device_brightness *brightness;
165 };
167 /* bus */
168 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
169 static struct file_operations acpi_video_bus_info_fops = {
170 .open = acpi_video_bus_info_open_fs,
171 .read = seq_read,
172 .llseek = seq_lseek,
173 .release = single_release,
174 };
176 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
177 static struct file_operations acpi_video_bus_ROM_fops = {
178 .open = acpi_video_bus_ROM_open_fs,
179 .read = seq_read,
180 .llseek = seq_lseek,
181 .release = single_release,
182 };
184 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
185 struct file *file);
186 static struct file_operations acpi_video_bus_POST_info_fops = {
187 .open = acpi_video_bus_POST_info_open_fs,
188 .read = seq_read,
189 .llseek = seq_lseek,
190 .release = single_release,
191 };
193 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
194 static struct file_operations acpi_video_bus_POST_fops = {
195 .open = acpi_video_bus_POST_open_fs,
196 .read = seq_read,
197 .llseek = seq_lseek,
198 .release = single_release,
199 };
201 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
202 static struct file_operations acpi_video_bus_DOS_fops = {
203 .open = acpi_video_bus_DOS_open_fs,
204 .read = seq_read,
205 .llseek = seq_lseek,
206 .release = single_release,
207 };
209 /* device */
210 static int acpi_video_device_info_open_fs(struct inode *inode,
211 struct file *file);
212 static struct file_operations acpi_video_device_info_fops = {
213 .open = acpi_video_device_info_open_fs,
214 .read = seq_read,
215 .llseek = seq_lseek,
216 .release = single_release,
217 };
219 static int acpi_video_device_state_open_fs(struct inode *inode,
220 struct file *file);
221 static struct file_operations acpi_video_device_state_fops = {
222 .open = acpi_video_device_state_open_fs,
223 .read = seq_read,
224 .llseek = seq_lseek,
225 .release = single_release,
226 };
228 static int acpi_video_device_brightness_open_fs(struct inode *inode,
229 struct file *file);
230 static struct file_operations acpi_video_device_brightness_fops = {
231 .open = acpi_video_device_brightness_open_fs,
232 .read = seq_read,
233 .llseek = seq_lseek,
234 .release = single_release,
235 };
237 static int acpi_video_device_EDID_open_fs(struct inode *inode,
238 struct file *file);
239 static struct file_operations acpi_video_device_EDID_fops = {
240 .open = acpi_video_device_EDID_open_fs,
241 .read = seq_read,
242 .llseek = seq_lseek,
243 .release = single_release,
244 };
246 static char device_decode[][30] = {
247 "motherboard VGA device",
248 "PCI VGA device",
249 "AGP VGA device",
250 "UNKNOWN",
251 };
253 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
254 static void acpi_video_device_rebind(struct acpi_video_bus *video);
255 static void acpi_video_device_bind(struct acpi_video_bus *video,
256 struct acpi_video_device *device);
257 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
258 static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
259 static int acpi_video_get_next_level(struct acpi_video_device *device,
260 u32 level_current, u32 event);
261 static void acpi_video_switch_brightness(struct acpi_video_device *device,
262 int event);
264 /* --------------------------------------------------------------------------
265 Video Management
266 -------------------------------------------------------------------------- */
268 /* device */
270 static int
271 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
272 {
273 int status;
275 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
277 return status;
278 }
280 static int
281 acpi_video_device_get_state(struct acpi_video_device *device,
282 unsigned long *state)
283 {
284 int status;
286 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
288 return status;
289 }
291 static int
292 acpi_video_device_set_state(struct acpi_video_device *device, int state)
293 {
294 int status;
295 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
296 struct acpi_object_list args = { 1, &arg0 };
297 unsigned long ret;
300 arg0.integer.value = state;
301 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
303 return status;
304 }
306 static int
307 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
308 union acpi_object **levels)
309 {
310 int status;
311 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
312 union acpi_object *obj;
315 *levels = NULL;
317 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
318 if (!ACPI_SUCCESS(status))
319 return status;
320 obj = (union acpi_object *)buffer.pointer;
321 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
322 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
323 status = -EFAULT;
324 goto err;
325 }
327 *levels = obj;
329 return 0;
331 err:
332 kfree(buffer.pointer);
334 return status;
335 }
337 static int
338 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
339 {
340 int status;
341 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
342 struct acpi_object_list args = { 1, &arg0 };
345 arg0.integer.value = level;
346 status = acpi_evaluate_object(device->dev->handle, "_BCM", &args, NULL);
348 printk(KERN_DEBUG "set_level status: %x\n", status);
349 return status;
350 }
352 static int
353 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
354 unsigned long *level)
355 {
356 int status;
358 status = acpi_evaluate_integer(device->dev->handle, "_BQC", NULL, level);
360 return status;
361 }
363 static int
364 acpi_video_device_EDID(struct acpi_video_device *device,
365 union acpi_object **edid, ssize_t length)
366 {
367 int status;
368 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
369 union acpi_object *obj;
370 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
371 struct acpi_object_list args = { 1, &arg0 };
374 *edid = NULL;
376 if (!device)
377 return -ENODEV;
378 if (length == 128)
379 arg0.integer.value = 1;
380 else if (length == 256)
381 arg0.integer.value = 2;
382 else
383 return -EINVAL;
385 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
386 if (ACPI_FAILURE(status))
387 return -ENODEV;
389 obj = (union acpi_object *)buffer.pointer;
391 if (obj && obj->type == ACPI_TYPE_BUFFER)
392 *edid = obj;
393 else {
394 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
395 status = -EFAULT;
396 kfree(obj);
397 }
399 return status;
400 }
402 /* bus */
404 static int
405 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
406 {
407 int status;
408 unsigned long tmp;
409 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
410 struct acpi_object_list args = { 1, &arg0 };
413 arg0.integer.value = option;
415 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
416 if (ACPI_SUCCESS(status))
417 status = tmp ? (-EINVAL) : (AE_OK);
419 return status;
420 }
422 static int
423 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
424 {
425 int status;
427 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
429 return status;
430 }
432 static int
433 acpi_video_bus_POST_options(struct acpi_video_bus *video,
434 unsigned long *options)
435 {
436 int status;
438 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
439 *options &= 3;
441 return status;
442 }
444 /*
445 * Arg:
446 * video : video bus device pointer
447 * bios_flag :
448 * 0. The system BIOS should NOT automatically switch(toggle)
449 * the active display output.
450 * 1. The system BIOS should automatically switch (toggle) the
451 * active display output. No swich event.
452 * 2. The _DGS value should be locked.
453 * 3. The system BIOS should not automatically switch (toggle) the
454 * active display output, but instead generate the display switch
455 * event notify code.
456 * lcd_flag :
457 * 0. The system BIOS should automatically control the brightness level
458 * of the LCD, when the power changes from AC to DC
459 * 1. The system BIOS should NOT automatically control the brightness
460 * level of the LCD, when the power changes from AC to DC.
461 * Return Value:
462 * -1 wrong arg.
463 */
465 static int
466 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
467 {
468 acpi_integer status = 0;
469 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
470 struct acpi_object_list args = { 1, &arg0 };
473 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
474 status = -1;
475 goto Failed;
476 }
477 arg0.integer.value = (lcd_flag << 2) | bios_flag;
478 video->dos_setting = arg0.integer.value;
479 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
481 Failed:
482 return status;
483 }
485 /*
486 * Arg:
487 * device : video output device (LCD, CRT, ..)
488 *
489 * Return Value:
490 * None
491 *
492 * Find out all required AML method defined under the output
493 * device.
494 */
496 static void acpi_video_device_find_cap(struct acpi_video_device *device)
497 {
498 acpi_integer status;
499 acpi_handle h_dummy1;
500 int i;
501 union acpi_object *obj = NULL;
502 struct acpi_video_device_brightness *br = NULL;
505 memset(&device->cap, 0, 4);
507 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
508 device->cap._ADR = 1;
509 }
510 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
511 device->cap._BCL = 1;
512 }
513 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
514 device->cap._BCM = 1;
515 }
516 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
517 device->cap._DDC = 1;
518 }
519 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
520 device->cap._DCS = 1;
521 }
522 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
523 device->cap._DGS = 1;
524 }
525 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
526 device->cap._DSS = 1;
527 }
529 status = acpi_video_device_lcd_query_levels(device, &obj);
531 if (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
532 int count = 0;
533 union acpi_object *o;
535 br = kmalloc(sizeof(*br), GFP_KERNEL);
536 if (!br) {
537 printk(KERN_ERR "can't allocate memory\n");
538 } else {
539 memset(br, 0, sizeof(*br));
540 br->levels = kmalloc(obj->package.count *
541 sizeof *(br->levels), GFP_KERNEL);
542 if (!br->levels)
543 goto out;
545 for (i = 0; i < obj->package.count; i++) {
546 o = (union acpi_object *)&obj->package.
547 elements[i];
548 if (o->type != ACPI_TYPE_INTEGER) {
549 printk(KERN_ERR PREFIX "Invalid data\n");
550 continue;
551 }
552 br->levels[count] = (u32) o->integer.value;
553 count++;
554 }
555 out:
556 if (count < 2) {
557 kfree(br->levels);
558 kfree(br);
559 } else {
560 br->count = count;
561 device->brightness = br;
562 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
563 "found %d brightness levels\n",
564 count));
565 }
566 }
567 }
569 kfree(obj);
571 return;
572 }
574 /*
575 * Arg:
576 * device : video output device (VGA)
577 *
578 * Return Value:
579 * None
580 *
581 * Find out all required AML method defined under the video bus device.
582 */
584 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
585 {
586 acpi_handle h_dummy1;
588 memset(&video->cap, 0, 4);
589 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
590 video->cap._DOS = 1;
591 }
592 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
593 video->cap._DOD = 1;
594 }
595 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
596 video->cap._ROM = 1;
597 }
598 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
599 video->cap._GPD = 1;
600 }
601 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
602 video->cap._SPD = 1;
603 }
604 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
605 video->cap._VPO = 1;
606 }
607 }
609 /*
610 * Check whether the video bus device has required AML method to
611 * support the desired features
612 */
614 static int acpi_video_bus_check(struct acpi_video_bus *video)
615 {
616 acpi_status status = -ENOENT;
619 if (!video)
620 return -EINVAL;
622 /* Since there is no HID, CID and so on for VGA driver, we have
623 * to check well known required nodes.
624 */
626 /* Does this device able to support video switching ? */
627 if (video->cap._DOS) {
628 video->flags.multihead = 1;
629 status = 0;
630 }
632 /* Does this device able to retrieve a retrieve a video ROM ? */
633 if (video->cap._ROM) {
634 video->flags.rom = 1;
635 status = 0;
636 }
638 /* Does this device able to configure which video device to POST ? */
639 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
640 video->flags.post = 1;
641 status = 0;
642 }
644 return status;
645 }
647 /* --------------------------------------------------------------------------
648 FS Interface (/proc)
649 -------------------------------------------------------------------------- */
651 static struct proc_dir_entry *acpi_video_dir;
653 /* video devices */
655 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
656 {
657 struct acpi_video_device *dev =
658 (struct acpi_video_device *)seq->private;
661 if (!dev)
662 goto end;
664 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
665 seq_printf(seq, "type: ");
666 if (dev->flags.crt)
667 seq_printf(seq, "CRT\n");
668 else if (dev->flags.lcd)
669 seq_printf(seq, "LCD\n");
670 else if (dev->flags.tvout)
671 seq_printf(seq, "TVOUT\n");
672 else
673 seq_printf(seq, "UNKNOWN\n");
675 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
677 end:
678 return 0;
679 }
681 static int
682 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
683 {
684 return single_open(file, acpi_video_device_info_seq_show,
685 PDE(inode)->data);
686 }
688 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
689 {
690 int status;
691 struct acpi_video_device *dev =
692 (struct acpi_video_device *)seq->private;
693 unsigned long state;
696 if (!dev)
697 goto end;
699 status = acpi_video_device_get_state(dev, &state);
700 seq_printf(seq, "state: ");
701 if (ACPI_SUCCESS(status))
702 seq_printf(seq, "0x%02lx\n", state);
703 else
704 seq_printf(seq, "<not supported>\n");
706 status = acpi_video_device_query(dev, &state);
707 seq_printf(seq, "query: ");
708 if (ACPI_SUCCESS(status))
709 seq_printf(seq, "0x%02lx\n", state);
710 else
711 seq_printf(seq, "<not supported>\n");
713 end:
714 return 0;
715 }
717 static int
718 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
719 {
720 return single_open(file, acpi_video_device_state_seq_show,
721 PDE(inode)->data);
722 }
724 static ssize_t
725 acpi_video_device_write_state(struct file *file,
726 const char __user * buffer,
727 size_t count, loff_t * data)
728 {
729 int status;
730 struct seq_file *m = (struct seq_file *)file->private_data;
731 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
732 char str[12] = { 0 };
733 u32 state = 0;
736 if (!dev || count + 1 > sizeof str)
737 return -EINVAL;
739 if (copy_from_user(str, buffer, count))
740 return -EFAULT;
742 str[count] = 0;
743 state = simple_strtoul(str, NULL, 0);
744 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
746 status = acpi_video_device_set_state(dev, state);
748 if (status)
749 return -EFAULT;
751 return count;
752 }
754 static int
755 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
756 {
757 struct acpi_video_device *dev =
758 (struct acpi_video_device *)seq->private;
759 int i;
762 if (!dev || !dev->brightness) {
763 seq_printf(seq, "<not supported>\n");
764 return 0;
765 }
767 seq_printf(seq, "levels: ");
768 for (i = 0; i < dev->brightness->count; i++)
769 seq_printf(seq, " %d", dev->brightness->levels[i]);
770 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
772 return 0;
773 }
775 static int
776 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
777 {
778 return single_open(file, acpi_video_device_brightness_seq_show,
779 PDE(inode)->data);
780 }
782 static ssize_t
783 acpi_video_device_write_brightness(struct file *file,
784 const char __user * buffer,
785 size_t count, loff_t * data)
786 {
787 struct seq_file *m = (struct seq_file *)file->private_data;
788 struct acpi_video_device *dev = (struct acpi_video_device *)m->private;
789 char str[4] = { 0 };
790 unsigned int level = 0;
791 int i;
794 if (!dev || !dev->brightness || count + 1 > sizeof str)
795 return -EINVAL;
797 if (copy_from_user(str, buffer, count))
798 return -EFAULT;
800 str[count] = 0;
801 level = simple_strtoul(str, NULL, 0);
803 if (level > 100)
804 return -EFAULT;
806 /* validate though the list of available levels */
807 for (i = 0; i < dev->brightness->count; i++)
808 if (level == dev->brightness->levels[i]) {
809 if (ACPI_SUCCESS
810 (acpi_video_device_lcd_set_level(dev, level)))
811 dev->brightness->curr = level;
812 break;
813 }
815 return count;
816 }
818 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
819 {
820 struct acpi_video_device *dev =
821 (struct acpi_video_device *)seq->private;
822 int status;
823 int i;
824 union acpi_object *edid = NULL;
827 if (!dev)
828 goto out;
830 status = acpi_video_device_EDID(dev, &edid, 128);
831 if (ACPI_FAILURE(status)) {
832 status = acpi_video_device_EDID(dev, &edid, 256);
833 }
835 if (ACPI_FAILURE(status)) {
836 goto out;
837 }
839 if (edid && edid->type == ACPI_TYPE_BUFFER) {
840 for (i = 0; i < edid->buffer.length; i++)
841 seq_putc(seq, edid->buffer.pointer[i]);
842 }
844 out:
845 if (!edid)
846 seq_printf(seq, "<not supported>\n");
847 else
848 kfree(edid);
850 return 0;
851 }
853 static int
854 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
855 {
856 return single_open(file, acpi_video_device_EDID_seq_show,
857 PDE(inode)->data);
858 }
860 static int acpi_video_device_add_fs(struct acpi_device *device)
861 {
862 struct proc_dir_entry *entry = NULL;
863 struct acpi_video_device *vid_dev;
866 if (!device)
867 return -ENODEV;
869 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
870 if (!vid_dev)
871 return -ENODEV;
873 if (!acpi_device_dir(device)) {
874 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
875 vid_dev->video->dir);
876 if (!acpi_device_dir(device))
877 return -ENODEV;
878 acpi_device_dir(device)->owner = THIS_MODULE;
879 }
881 /* 'info' [R] */
882 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
883 if (!entry)
884 return -ENODEV;
885 else {
886 entry->proc_fops = &acpi_video_device_info_fops;
887 entry->data = acpi_driver_data(device);
888 entry->owner = THIS_MODULE;
889 }
891 /* 'state' [R/W] */
892 entry =
893 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
894 acpi_device_dir(device));
895 if (!entry)
896 return -ENODEV;
897 else {
898 acpi_video_device_state_fops.write = acpi_video_device_write_state;
899 entry->proc_fops = &acpi_video_device_state_fops;
900 entry->data = acpi_driver_data(device);
901 entry->owner = THIS_MODULE;
902 }
904 /* 'brightness' [R/W] */
905 entry =
906 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
907 acpi_device_dir(device));
908 if (!entry)
909 return -ENODEV;
910 else {
911 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
912 entry->proc_fops = &acpi_video_device_brightness_fops;
913 entry->data = acpi_driver_data(device);
914 entry->owner = THIS_MODULE;
915 }
917 /* 'EDID' [R] */
918 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
919 if (!entry)
920 return -ENODEV;
921 else {
922 entry->proc_fops = &acpi_video_device_EDID_fops;
923 entry->data = acpi_driver_data(device);
924 entry->owner = THIS_MODULE;
925 }
927 return 0;
928 }
930 static int acpi_video_device_remove_fs(struct acpi_device *device)
931 {
932 struct acpi_video_device *vid_dev;
934 vid_dev = (struct acpi_video_device *)acpi_driver_data(device);
935 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
936 return -ENODEV;
938 if (acpi_device_dir(device)) {
939 remove_proc_entry("info", acpi_device_dir(device));
940 remove_proc_entry("state", acpi_device_dir(device));
941 remove_proc_entry("brightness", acpi_device_dir(device));
942 remove_proc_entry("EDID", acpi_device_dir(device));
943 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
944 acpi_device_dir(device) = NULL;
945 }
947 return 0;
948 }
950 /* video bus */
951 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
952 {
953 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
956 if (!video)
957 goto end;
959 seq_printf(seq, "Switching heads: %s\n",
960 video->flags.multihead ? "yes" : "no");
961 seq_printf(seq, "Video ROM: %s\n",
962 video->flags.rom ? "yes" : "no");
963 seq_printf(seq, "Device to be POSTed on boot: %s\n",
964 video->flags.post ? "yes" : "no");
966 end:
967 return 0;
968 }
970 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
971 {
972 return single_open(file, acpi_video_bus_info_seq_show,
973 PDE(inode)->data);
974 }
976 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
977 {
978 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
981 if (!video)
982 goto end;
984 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
985 seq_printf(seq, "<TODO>\n");
987 end:
988 return 0;
989 }
991 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
992 {
993 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
994 }
996 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
997 {
998 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
999 unsigned long options;
1000 int status;
1003 if (!video)
1004 goto end;
1006 status = acpi_video_bus_POST_options(video, &options);
1007 if (ACPI_SUCCESS(status)) {
1008 if (!(options & 1)) {
1009 printk(KERN_WARNING PREFIX
1010 "The motherboard VGA device is not listed as a possible POST device.\n");
1011 printk(KERN_WARNING PREFIX
1012 "This indicate a BIOS bug. Please contact the manufacturer.\n");
1014 printk("%lx\n", options);
1015 seq_printf(seq, "can POST: <intgrated video>");
1016 if (options & 2)
1017 seq_printf(seq, " <PCI video>");
1018 if (options & 4)
1019 seq_printf(seq, " <AGP video>");
1020 seq_putc(seq, '\n');
1021 } else
1022 seq_printf(seq, "<not supported>\n");
1023 end:
1024 return 0;
1027 static int
1028 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1030 return single_open(file, acpi_video_bus_POST_info_seq_show,
1031 PDE(inode)->data);
1034 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1036 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1037 int status;
1038 unsigned long id;
1041 if (!video)
1042 goto end;
1044 status = acpi_video_bus_get_POST(video, &id);
1045 if (!ACPI_SUCCESS(status)) {
1046 seq_printf(seq, "<not supported>\n");
1047 goto end;
1049 seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
1051 end:
1052 return 0;
1055 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1057 struct acpi_video_bus *video = (struct acpi_video_bus *)seq->private;
1060 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1062 return 0;
1065 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1067 return single_open(file, acpi_video_bus_POST_seq_show,
1068 PDE(inode)->data);
1071 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1073 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1076 static ssize_t
1077 acpi_video_bus_write_POST(struct file *file,
1078 const char __user * buffer,
1079 size_t count, loff_t * data)
1081 int status;
1082 struct seq_file *m = (struct seq_file *)file->private_data;
1083 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1084 char str[12] = { 0 };
1085 unsigned long opt, options;
1088 if (!video || count + 1 > sizeof str)
1089 return -EINVAL;
1091 status = acpi_video_bus_POST_options(video, &options);
1092 if (!ACPI_SUCCESS(status))
1093 return -EINVAL;
1095 if (copy_from_user(str, buffer, count))
1096 return -EFAULT;
1098 str[count] = 0;
1099 opt = strtoul(str, NULL, 0);
1100 if (opt > 3)
1101 return -EFAULT;
1103 /* just in case an OEM 'forget' the motherboard... */
1104 options |= 1;
1106 if (options & (1ul << opt)) {
1107 status = acpi_video_bus_set_POST(video, opt);
1108 if (!ACPI_SUCCESS(status))
1109 return -EFAULT;
1113 return count;
1116 static ssize_t
1117 acpi_video_bus_write_DOS(struct file *file,
1118 const char __user * buffer,
1119 size_t count, loff_t * data)
1121 int status;
1122 struct seq_file *m = (struct seq_file *)file->private_data;
1123 struct acpi_video_bus *video = (struct acpi_video_bus *)m->private;
1124 char str[12] = { 0 };
1125 unsigned long opt;
1128 if (!video || count + 1 > sizeof str)
1129 return -EINVAL;
1131 if (copy_from_user(str, buffer, count))
1132 return -EFAULT;
1134 str[count] = 0;
1135 opt = strtoul(str, NULL, 0);
1136 if (opt > 7)
1137 return -EFAULT;
1139 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1141 if (!ACPI_SUCCESS(status))
1142 return -EFAULT;
1144 return count;
1147 static int acpi_video_bus_add_fs(struct acpi_device *device)
1149 struct proc_dir_entry *entry = NULL;
1150 struct acpi_video_bus *video;
1153 video = (struct acpi_video_bus *)acpi_driver_data(device);
1155 if (!acpi_device_dir(device)) {
1156 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1157 acpi_video_dir);
1158 if (!acpi_device_dir(device))
1159 return -ENODEV;
1160 video->dir = acpi_device_dir(device);
1161 acpi_device_dir(device)->owner = THIS_MODULE;
1164 /* 'info' [R] */
1165 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1166 if (!entry)
1167 return -ENODEV;
1168 else {
1169 entry->proc_fops = &acpi_video_bus_info_fops;
1170 entry->data = acpi_driver_data(device);
1171 entry->owner = THIS_MODULE;
1174 /* 'ROM' [R] */
1175 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1176 if (!entry)
1177 return -ENODEV;
1178 else {
1179 entry->proc_fops = &acpi_video_bus_ROM_fops;
1180 entry->data = acpi_driver_data(device);
1181 entry->owner = THIS_MODULE;
1184 /* 'POST_info' [R] */
1185 entry =
1186 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1187 if (!entry)
1188 return -ENODEV;
1189 else {
1190 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1191 entry->data = acpi_driver_data(device);
1192 entry->owner = THIS_MODULE;
1195 /* 'POST' [R/W] */
1196 entry =
1197 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1198 acpi_device_dir(device));
1199 if (!entry)
1200 return -ENODEV;
1201 else {
1202 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1203 entry->proc_fops = &acpi_video_bus_POST_fops;
1204 entry->data = acpi_driver_data(device);
1205 entry->owner = THIS_MODULE;
1208 /* 'DOS' [R/W] */
1209 entry =
1210 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1211 acpi_device_dir(device));
1212 if (!entry)
1213 return -ENODEV;
1214 else {
1215 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1216 entry->proc_fops = &acpi_video_bus_DOS_fops;
1217 entry->data = acpi_driver_data(device);
1218 entry->owner = THIS_MODULE;
1221 return 0;
1224 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1226 struct acpi_video_bus *video;
1229 video = (struct acpi_video_bus *)acpi_driver_data(device);
1231 if (acpi_device_dir(device)) {
1232 remove_proc_entry("info", acpi_device_dir(device));
1233 remove_proc_entry("ROM", acpi_device_dir(device));
1234 remove_proc_entry("POST_info", acpi_device_dir(device));
1235 remove_proc_entry("POST", acpi_device_dir(device));
1236 remove_proc_entry("DOS", acpi_device_dir(device));
1237 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1238 acpi_device_dir(device) = NULL;
1241 return 0;
1244 /* --------------------------------------------------------------------------
1245 Driver Interface
1246 -------------------------------------------------------------------------- */
1248 /* device interface */
1250 static int
1251 acpi_video_bus_get_one_device(struct acpi_device *device,
1252 struct acpi_video_bus *video)
1254 unsigned long device_id;
1255 int status;
1256 struct acpi_video_device *data;
1259 if (!device || !video)
1260 return -EINVAL;
1262 status =
1263 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1264 if (ACPI_SUCCESS(status)) {
1266 data = kmalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1267 if (!data)
1268 return -ENOMEM;
1270 memset(data, 0, sizeof(struct acpi_video_device));
1272 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1273 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1274 acpi_driver_data(device) = data;
1276 data->device_id = device_id;
1277 data->video = video;
1278 data->dev = device;
1280 switch (device_id & 0xffff) {
1281 case 0x0100:
1282 data->flags.crt = 1;
1283 break;
1284 case 0x0400:
1285 data->flags.lcd = 1;
1286 break;
1287 case 0x0200:
1288 data->flags.tvout = 1;
1289 break;
1290 default:
1291 data->flags.unknown = 1;
1292 break;
1295 acpi_video_device_bind(video, data);
1296 acpi_video_device_find_cap(data);
1298 status = acpi_install_notify_handler(device->handle,
1299 ACPI_DEVICE_NOTIFY,
1300 acpi_video_device_notify,
1301 data);
1302 if (ACPI_FAILURE(status)) {
1303 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1304 "Error installing notify handler\n"));
1305 if(data->brightness)
1306 kfree(data->brightness->levels);
1307 kfree(data->brightness);
1308 kfree(data);
1309 return -ENODEV;
1312 down(&video->sem);
1313 list_add_tail(&data->entry, &video->video_device_list);
1314 up(&video->sem);
1316 acpi_video_device_add_fs(device);
1318 return 0;
1321 return -ENOENT;
1324 /*
1325 * Arg:
1326 * video : video bus device
1328 * Return:
1329 * none
1331 * Enumerate the video device list of the video bus,
1332 * bind the ids with the corresponding video devices
1333 * under the video bus.
1334 */
1336 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1338 struct list_head *node, *next;
1339 list_for_each_safe(node, next, &video->video_device_list) {
1340 struct acpi_video_device *dev =
1341 container_of(node, struct acpi_video_device, entry);
1342 acpi_video_device_bind(video, dev);
1346 /*
1347 * Arg:
1348 * video : video bus device
1349 * device : video output device under the video
1350 * bus
1352 * Return:
1353 * none
1355 * Bind the ids with the corresponding video devices
1356 * under the video bus.
1357 */
1359 static void
1360 acpi_video_device_bind(struct acpi_video_bus *video,
1361 struct acpi_video_device *device)
1363 int i;
1365 #define IDS_VAL(i) video->attached_array[i].value.int_val
1366 #define IDS_BIND(i) video->attached_array[i].bind_info
1368 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1369 i < video->attached_count; i++) {
1370 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1371 IDS_BIND(i) = device;
1372 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1375 #undef IDS_VAL
1376 #undef IDS_BIND
1379 /*
1380 * Arg:
1381 * video : video bus device
1383 * Return:
1384 * < 0 : error
1386 * Call _DOD to enumerate all devices attached to display adapter
1388 */
1390 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1392 int status;
1393 int count;
1394 int i;
1395 struct acpi_video_enumerated_device *active_device_list;
1396 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1397 union acpi_object *dod = NULL;
1398 union acpi_object *obj;
1400 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1401 if (!ACPI_SUCCESS(status)) {
1402 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1403 return status;
1406 dod = (union acpi_object *)buffer.pointer;
1407 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1408 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1409 status = -EFAULT;
1410 goto out;
1413 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1414 dod->package.count));
1416 active_device_list = kmalloc((1 +
1417 dod->package.count) *
1418 sizeof(struct
1419 acpi_video_enumerated_device),
1420 GFP_KERNEL);
1422 if (!active_device_list) {
1423 status = -ENOMEM;
1424 goto out;
1427 count = 0;
1428 for (i = 0; i < dod->package.count; i++) {
1429 obj = (union acpi_object *)&dod->package.elements[i];
1431 if (obj->type != ACPI_TYPE_INTEGER) {
1432 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1433 active_device_list[i].value.int_val =
1434 ACPI_VIDEO_HEAD_INVALID;
1436 active_device_list[i].value.int_val = obj->integer.value;
1437 active_device_list[i].bind_info = NULL;
1438 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1439 (int)obj->integer.value));
1440 count++;
1442 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1444 kfree(video->attached_array);
1446 video->attached_array = active_device_list;
1447 video->attached_count = count;
1448 out:
1449 kfree(buffer.pointer);
1450 return status;
1453 /*
1454 * Arg:
1455 * video : video bus device
1456 * event : Nontify Event
1458 * Return:
1459 * < 0 : error
1461 * 1. Find out the current active output device.
1462 * 2. Identify the next output device to switch
1463 * 3. call _DSS to do actual switch.
1464 */
1466 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1468 struct list_head *node, *next;
1469 struct acpi_video_device *dev = NULL;
1470 struct acpi_video_device *dev_next = NULL;
1471 struct acpi_video_device *dev_prev = NULL;
1472 unsigned long state;
1473 int status = 0;
1476 list_for_each_safe(node, next, &video->video_device_list) {
1477 dev = container_of(node, struct acpi_video_device, entry);
1478 status = acpi_video_device_get_state(dev, &state);
1479 if (state & 0x2) {
1480 dev_next =
1481 container_of(node->next, struct acpi_video_device,
1482 entry);
1483 dev_prev =
1484 container_of(node->prev, struct acpi_video_device,
1485 entry);
1486 goto out;
1489 dev_next = container_of(node->next, struct acpi_video_device, entry);
1490 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1491 out:
1492 switch (event) {
1493 case ACPI_VIDEO_NOTIFY_CYCLE:
1494 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1495 acpi_video_device_set_state(dev, 0);
1496 acpi_video_device_set_state(dev_next, 0x80000001);
1497 break;
1498 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1499 acpi_video_device_set_state(dev, 0);
1500 acpi_video_device_set_state(dev_prev, 0x80000001);
1501 default:
1502 break;
1505 return status;
1508 static int
1509 acpi_video_get_next_level(struct acpi_video_device *device,
1510 u32 level_current, u32 event)
1512 /*Fix me */
1513 return level_current;
1516 static void
1517 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1519 unsigned long level_current, level_next;
1520 acpi_video_device_lcd_get_level_current(device, &level_current);
1521 level_next = acpi_video_get_next_level(device, level_current, event);
1522 acpi_video_device_lcd_set_level(device, level_next);
1525 static int
1526 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1527 struct acpi_device *device)
1529 int status = 0;
1530 struct list_head *node, *next;
1533 acpi_video_device_enumerate(video);
1535 list_for_each_safe(node, next, &device->children) {
1536 struct acpi_device *dev =
1537 list_entry(node, struct acpi_device, node);
1539 if (!dev)
1540 continue;
1542 status = acpi_video_bus_get_one_device(dev, video);
1543 if (ACPI_FAILURE(status)) {
1544 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1545 continue;
1549 return status;
1552 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1554 acpi_status status;
1555 struct acpi_video_bus *video;
1558 if (!device || !device->video)
1559 return -ENOENT;
1561 video = device->video;
1563 down(&video->sem);
1564 list_del(&device->entry);
1565 up(&video->sem);
1566 acpi_video_device_remove_fs(device->dev);
1568 status = acpi_remove_notify_handler(device->dev->handle,
1569 ACPI_DEVICE_NOTIFY,
1570 acpi_video_device_notify);
1572 return 0;
1575 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1577 int status;
1578 struct list_head *node, *next;
1581 list_for_each_safe(node, next, &video->video_device_list) {
1582 struct acpi_video_device *data =
1583 list_entry(node, struct acpi_video_device, entry);
1584 if (!data)
1585 continue;
1587 status = acpi_video_bus_put_one_device(data);
1588 if (ACPI_FAILURE(status))
1589 printk(KERN_WARNING PREFIX
1590 "hhuuhhuu bug in acpi video driver.\n");
1592 if (data->brightness)
1593 kfree(data->brightness->levels);
1594 kfree(data->brightness);
1595 kfree(data);
1598 return 0;
1601 /* acpi_video interface */
1603 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1605 return acpi_video_bus_DOS(video, 1, 0);
1608 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1610 return acpi_video_bus_DOS(video, 0, 1);
1613 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1615 struct acpi_video_bus *video = (struct acpi_video_bus *)data;
1616 struct acpi_device *device = NULL;
1618 printk("video bus notify\n");
1620 if (!video)
1621 return;
1623 device = video->device;
1625 switch (event) {
1626 case ACPI_VIDEO_NOTIFY_SWITCH: /* User request that a switch occur,
1627 * most likely via hotkey. */
1628 acpi_bus_generate_event(device, event, 0);
1629 break;
1631 case ACPI_VIDEO_NOTIFY_PROBE: /* User plug or remove a video
1632 * connector. */
1633 acpi_video_device_enumerate(video);
1634 acpi_video_device_rebind(video);
1635 acpi_video_switch_output(video, event);
1636 acpi_bus_generate_event(device, event, 0);
1637 break;
1639 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1640 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1641 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1642 acpi_video_switch_output(video, event);
1643 acpi_bus_generate_event(device, event, 0);
1644 break;
1646 default:
1647 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1648 "Unsupported event [0x%x]\n", event));
1649 break;
1652 return;
1655 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1657 struct acpi_video_device *video_device =
1658 (struct acpi_video_device *)data;
1659 struct acpi_device *device = NULL;
1662 printk("video device notify\n");
1663 if (!video_device)
1664 return;
1666 device = video_device->dev;
1668 switch (event) {
1669 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1670 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1671 acpi_bus_generate_event(device, event, 0);
1672 break;
1673 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1674 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1675 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1676 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1677 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1678 acpi_video_switch_brightness(video_device, event);
1679 acpi_bus_generate_event(device, event, 0);
1680 break;
1681 default:
1682 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1683 "Unsupported event [0x%x]\n", event));
1684 break;
1686 return;
1689 static int acpi_video_bus_add(struct acpi_device *device)
1691 int result = 0;
1692 acpi_status status = 0;
1693 struct acpi_video_bus *video = NULL;
1696 if (!device)
1697 return -EINVAL;
1699 video = kmalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1700 if (!video)
1701 return -ENOMEM;
1702 memset(video, 0, sizeof(struct acpi_video_bus));
1704 video->device = device;
1705 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1706 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1707 acpi_driver_data(device) = video;
1709 acpi_video_bus_find_cap(video);
1710 result = acpi_video_bus_check(video);
1711 if (result)
1712 goto end;
1714 result = acpi_video_bus_add_fs(device);
1715 if (result)
1716 goto end;
1718 init_MUTEX(&video->sem);
1719 INIT_LIST_HEAD(&video->video_device_list);
1721 acpi_video_bus_get_devices(video, device);
1722 acpi_video_bus_start_devices(video);
1724 status = acpi_install_notify_handler(device->handle,
1725 ACPI_DEVICE_NOTIFY,
1726 acpi_video_bus_notify, video);
1727 if (ACPI_FAILURE(status)) {
1728 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1729 "Error installing notify handler\n"));
1730 acpi_video_bus_stop_devices(video);
1731 acpi_video_bus_put_devices(video);
1732 kfree(video->attached_array);
1733 acpi_video_bus_remove_fs(device);
1734 result = -ENODEV;
1735 goto end;
1738 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1739 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1740 video->flags.multihead ? "yes" : "no",
1741 video->flags.rom ? "yes" : "no",
1742 video->flags.post ? "yes" : "no");
1744 end:
1745 if (result)
1746 kfree(video);
1748 return result;
1751 static int acpi_video_bus_remove(struct acpi_device *device, int type)
1753 acpi_status status = 0;
1754 struct acpi_video_bus *video = NULL;
1757 if (!device || !acpi_driver_data(device))
1758 return -EINVAL;
1760 video = (struct acpi_video_bus *)acpi_driver_data(device);
1762 acpi_video_bus_stop_devices(video);
1764 status = acpi_remove_notify_handler(video->device->handle,
1765 ACPI_DEVICE_NOTIFY,
1766 acpi_video_bus_notify);
1768 acpi_video_bus_put_devices(video);
1769 acpi_video_bus_remove_fs(device);
1771 kfree(video->attached_array);
1772 kfree(video);
1774 return 0;
1777 static int
1778 acpi_video_bus_match(struct acpi_device *device, struct acpi_driver *driver)
1780 acpi_handle h_dummy1;
1781 acpi_handle h_dummy2;
1782 acpi_handle h_dummy3;
1785 if (!device || !driver)
1786 return -EINVAL;
1788 /* Since there is no HID, CID for ACPI Video drivers, we have
1789 * to check well known required nodes for each feature we support.
1790 */
1792 /* Does this device able to support video switching ? */
1793 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
1794 ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
1795 return 0;
1797 /* Does this device able to retrieve a video ROM ? */
1798 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
1799 return 0;
1801 /* Does this device able to configure which video head to be POSTed ? */
1802 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
1803 ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
1804 ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
1805 return 0;
1807 return -ENODEV;
1810 static int __init acpi_video_init(void)
1812 int result = 0;
1815 /*
1816 acpi_dbg_level = 0xFFFFFFFF;
1817 acpi_dbg_layer = 0x08000000;
1818 */
1820 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1821 if (!acpi_video_dir)
1822 return -ENODEV;
1823 acpi_video_dir->owner = THIS_MODULE;
1825 result = acpi_bus_register_driver(&acpi_video_bus);
1826 if (result < 0) {
1827 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1828 return -ENODEV;
1831 return 0;
1834 static void __exit acpi_video_exit(void)
1837 acpi_bus_unregister_driver(&acpi_video_bus);
1839 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1841 return;
1844 module_init(acpi_video_init);
1845 module_exit(acpi_video_exit);