diff options
author | Steve French <sfrench@us.ibm.com> | 2005-08-30 14:33:26 -0400 |
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committer | Steve French <sfrench@us.ibm.com> | 2005-08-30 14:33:26 -0400 |
commit | 2016ef789a9ded2e169ad1c028ae3deb5302571f (patch) | |
tree | 601359f15b42d4d9868b4eadfe909a7bef6435c5 /sound/pci/ac97/ac97_bus.c | |
parent | 7f57356b70dda014ef269135942426e4a852023e (diff) | |
parent | 6b39374a27eb4be7e9d82145ae270ba02ea90dc8 (diff) |
Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Diffstat (limited to 'sound/pci/ac97/ac97_bus.c')
-rw-r--r-- | sound/pci/ac97/ac97_bus.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/sound/pci/ac97/ac97_bus.c b/sound/pci/ac97/ac97_bus.c new file mode 100644 index 000000000000..227f8b9f67ce --- /dev/null +++ b/sound/pci/ac97/ac97_bus.c | |||
@@ -0,0 +1,79 @@ | |||
1 | /* | ||
2 | * Linux driver model AC97 bus interface | ||
3 | * | ||
4 | * Author: Nicolas Pitre | ||
5 | * Created: Jan 14, 2005 | ||
6 | * Copyright: (C) MontaVista Software Inc. | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License as published by | ||
10 | * the Free Software Foundation; either version 2 of the License, or | ||
11 | * (at your option) any later version. | ||
12 | */ | ||
13 | |||
14 | #include <linux/module.h> | ||
15 | #include <linux/init.h> | ||
16 | #include <linux/device.h> | ||
17 | #include <linux/string.h> | ||
18 | |||
19 | /* | ||
20 | * Codec families have names seperated by commas, so we search for an | ||
21 | * individual codec name within the family string. | ||
22 | */ | ||
23 | static int ac97_bus_match(struct device *dev, struct device_driver *drv) | ||
24 | { | ||
25 | return (strstr(dev->bus_id, drv->name) != NULL); | ||
26 | } | ||
27 | |||
28 | static int ac97_bus_suspend(struct device *dev, pm_message_t state) | ||
29 | { | ||
30 | int ret = 0; | ||
31 | |||
32 | if (dev->driver && dev->driver->suspend) { | ||
33 | ret = dev->driver->suspend(dev, state, SUSPEND_DISABLE); | ||
34 | if (ret == 0) | ||
35 | ret = dev->driver->suspend(dev, state, SUSPEND_SAVE_STATE); | ||
36 | if (ret == 0) | ||
37 | ret = dev->driver->suspend(dev, state, SUSPEND_POWER_DOWN); | ||
38 | } | ||
39 | return ret; | ||
40 | } | ||
41 | |||
42 | static int ac97_bus_resume(struct device *dev) | ||
43 | { | ||
44 | int ret = 0; | ||
45 | |||
46 | if (dev->driver && dev->driver->resume) { | ||
47 | ret = dev->driver->resume(dev, RESUME_POWER_ON); | ||
48 | if (ret == 0) | ||
49 | ret = dev->driver->resume(dev, RESUME_RESTORE_STATE); | ||
50 | if (ret == 0) | ||
51 | ret = dev->driver->resume(dev, RESUME_ENABLE); | ||
52 | } | ||
53 | return ret; | ||
54 | } | ||
55 | |||
56 | struct bus_type ac97_bus_type = { | ||
57 | .name = "ac97", | ||
58 | .match = ac97_bus_match, | ||
59 | .suspend = ac97_bus_suspend, | ||
60 | .resume = ac97_bus_resume, | ||
61 | }; | ||
62 | |||
63 | static int __init ac97_bus_init(void) | ||
64 | { | ||
65 | return bus_register(&ac97_bus_type); | ||
66 | } | ||
67 | |||
68 | subsys_initcall(ac97_bus_init); | ||
69 | |||
70 | static void __exit ac97_bus_exit(void) | ||
71 | { | ||
72 | bus_unregister(&ac97_bus_type); | ||
73 | } | ||
74 | |||
75 | module_exit(ac97_bus_exit); | ||
76 | |||
77 | EXPORT_SYMBOL(ac97_bus_type); | ||
78 | |||
79 | MODULE_LICENSE("GPL"); | ||