2 * Apple Onboard Audio driver core
4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
6 * GPL v2, can be found in COPYING.
9 #include <linux/init.h>
10 #include <linux/module.h>
11 #include <linux/list.h>
15 MODULE_DESCRIPTION("Apple Onboard Audio Sound Driver");
16 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
17 MODULE_LICENSE("GPL");
19 /* We allow only one fabric. This simplifies things,
20 * and more don't really make that much sense */
21 static struct aoa_fabric *fabric;
22 static LIST_HEAD(codec_list);
24 static int attach_codec_to_fabric(struct aoa_codec *c)
28 if (!try_module_get(c->owner))
30 /* found_codec has to be assigned */
32 if (fabric->found_codec)
33 err = fabric->found_codec(c);
36 printk(KERN_ERR "snd-aoa: fabric didn't like codec %s\n",
46 printk(KERN_ERR "snd-aoa: codec %s didn't init\n", c->name);
48 if (fabric->remove_codec)
49 fabric->remove_codec(c);
53 if (fabric->attached_codec)
54 fabric->attached_codec(c);
58 int aoa_codec_register(struct aoa_codec *codec)
62 /* if there's a fabric already, we can tell if we
63 * will want to have this codec, so propagate error
64 * through. Otherwise, this will happen later... */
66 err = attach_codec_to_fabric(codec);
68 list_add(&codec->list, &codec_list);
71 EXPORT_SYMBOL_GPL(aoa_codec_register);
73 void aoa_codec_unregister(struct aoa_codec *codec)
75 list_del(&codec->list);
76 if (codec->fabric && codec->exit)
78 if (fabric && fabric->remove_codec)
79 fabric->remove_codec(codec);
81 module_put(codec->owner);
83 EXPORT_SYMBOL_GPL(aoa_codec_unregister);
85 int aoa_fabric_register(struct aoa_fabric *new_fabric, struct device *dev)
90 /* allow querying for presence of fabric
91 * (i.e. do this test first!) */
92 if (new_fabric == fabric) {
101 err = aoa_alsa_init(new_fabric->name, new_fabric->owner, dev);
108 list_for_each_entry(c, &codec_list, list) {
109 if (c->fabric != fabric)
110 attach_codec_to_fabric(c);
114 EXPORT_SYMBOL_GPL(aoa_fabric_register);
116 void aoa_fabric_unregister(struct aoa_fabric *old_fabric)
120 if (fabric != old_fabric)
123 list_for_each_entry(c, &codec_list, list) {
125 aoa_fabric_unlink_codec(c);
132 EXPORT_SYMBOL_GPL(aoa_fabric_unregister);
134 void aoa_fabric_unlink_codec(struct aoa_codec *codec)
136 if (!codec->fabric) {
137 printk(KERN_ERR "snd-aoa: fabric unassigned "
138 "in aoa_fabric_unlink_codec\n");
144 if (codec->fabric->remove_codec)
145 codec->fabric->remove_codec(codec);
146 codec->fabric = NULL;
147 module_put(codec->owner);
149 EXPORT_SYMBOL_GPL(aoa_fabric_unlink_codec);
151 static int __init aoa_init(void)
156 static void __exit aoa_exit(void)
161 module_init(aoa_init);
162 module_exit(aoa_exit);