1 /*
2 * Apple Onboard Audio Alsa helpers
3 *
4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
5 *
6 * GPL v2, can be found in COPYING.
7 */
8 #include <linux/module.h>
9 #include "snd-aoa-alsa.h"
10
11 static int index = -1;
12 module_param(index, int, 0444);
13 MODULE_PARM_DESC(index, "index for AOA sound card.");
14
15 static struct aoa_card *aoa_card;
16
17 int aoa_alsa_init(char *name, struct module *mod, struct device *dev)
18 {
19 struct snd_card *alsa_card;
20 int err;
21
22 if (aoa_card)
23 /* cannot be EEXIST due to usage in aoa_fabric_register */
24 return -EBUSY;
25
26 alsa_card = snd_card_new(index, name, mod, sizeof(struct aoa_card));
27 if (!alsa_card)
28 return -ENOMEM;
29 aoa_card = alsa_card->private_data;
30 aoa_card->alsa_card = alsa_card;
31 alsa_card->dev = dev;
32 strlcpy(alsa_card->driver, "AppleOnbdAudio", sizeof(alsa_card->driver));
33 strlcpy(alsa_card->shortname, name, sizeof(alsa_card->shortname));
34 strlcpy(alsa_card->longname, name, sizeof(alsa_card->longname));
35 strlcpy(alsa_card->mixername, name, sizeof(alsa_card->mixername));
36 err = snd_card_register(aoa_card->alsa_card);
37 if (err < 0) {
38 printk(KERN_ERR "snd-aoa: couldn't register alsa card\n");
39 snd_card_free(aoa_card->alsa_card);
40 aoa_card = NULL;
41 return err;
42 }
43 return 0;
44 }
45
46 struct snd_card *aoa_get_card(void)
47 {
48 if (aoa_card)
49 return aoa_card->alsa_card;
50 return NULL;
51 }
52 EXPORT_SYMBOL_GPL(aoa_get_card);
53
54 void aoa_alsa_cleanup(void)
55 {
56 if (aoa_card) {
57 snd_card_free(aoa_card->alsa_card);
58 aoa_card = NULL;
59 }
60 }
61
62 int aoa_snd_device_new(snd_device_type_t type,
63 void * device_data, struct snd_device_ops * ops)
64 {
65 struct snd_card *card = aoa_get_card();
66 int err;
67
68 if (!card) return -ENOMEM;
69
70 err = snd_device_new(card, type, device_data, ops);
71 if (err) {
72 printk(KERN_ERR "snd-aoa: failed to create snd device (%d)\n", err);
73 return err;
74 }
75 err = snd_device_register(card, device_data);
76 if (err) {
77 printk(KERN_ERR "snd-aoa: failed to register "
78 "snd device (%d)\n", err);
79 printk(KERN_ERR "snd-aoa: have you forgotten the "
80 "dev_register callback?\n");
81 snd_device_free(card, device_data);
82 }
83 return err;
84 }
85 EXPORT_SYMBOL_GPL(aoa_snd_device_new);
86
87 int aoa_snd_ctl_add(struct snd_kcontrol* control)
88 {
89 int err;
90
91 if (!aoa_card) return -ENODEV;
92
93 err = snd_ctl_add(aoa_card->alsa_card, control);
94 if (err)
95 printk(KERN_ERR "snd-aoa: failed to add alsa control (%d)\n",
96 err);
97 return err;
98 }
99 EXPORT_SYMBOL_GPL(aoa_snd_ctl_add);
100
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