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
11static int index = -1;
12module_param(index, int, 0444);
13MODULE_PARM_DESC(index, "index for AOA sound card.");
14
15static struct aoa_card *aoa_card;
16
17int 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
46struct snd_card *aoa_get_card(void)
47{
48	if (aoa_card)
49		return aoa_card->alsa_card;
50	return NULL;
51}
52EXPORT_SYMBOL_GPL(aoa_get_card);
53
54void aoa_alsa_cleanup(void)
55{
56	if (aoa_card) {
57		snd_card_free(aoa_card->alsa_card);
58		aoa_card = NULL;
59	}
60}
61
62int 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}
85EXPORT_SYMBOL_GPL(aoa_snd_device_new);
86
87int 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}
99EXPORT_SYMBOL_GPL(aoa_snd_ctl_add);
100