1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Apple Onboard Audio Alsa helpers
4 *
5 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
6 */
7#include <linux/module.h>
8#include "alsa.h"
9
10static int index = -1;
11module_param(index, int, 0444);
12MODULE_PARM_DESC(index, "index for AOA sound card.");
13
14static struct aoa_card *aoa_card;
15
16int aoa_alsa_init(char *name, struct module *mod, struct device *dev)
17{
18	struct snd_card *alsa_card;
19	int err;
20
21	if (aoa_card)
22		/* cannot be EEXIST due to usage in aoa_fabric_register */
23		return -EBUSY;
24
25	err = snd_card_new(dev, index, name, mod, sizeof(struct aoa_card),
26			   &alsa_card);
27	if (err < 0)
28		return err;
29	aoa_card = alsa_card->private_data;
30	aoa_card->alsa_card = alsa_card;
31	strscpy(alsa_card->driver, "AppleOnbdAudio", sizeof(alsa_card->driver));
32	strscpy(alsa_card->shortname, name, sizeof(alsa_card->shortname));
33	strscpy(alsa_card->longname, name, sizeof(alsa_card->longname));
34	strscpy(alsa_card->mixername, name, sizeof(alsa_card->mixername));
35	err = snd_card_register(aoa_card->alsa_card);
36	if (err < 0) {
37		printk(KERN_ERR "snd-aoa: couldn't register alsa card\n");
38		snd_card_free(aoa_card->alsa_card);
39		aoa_card = NULL;
40		return err;
41	}
42	return 0;
43}
44
45struct snd_card *aoa_get_card(void)
46{
47	if (aoa_card)
48		return aoa_card->alsa_card;
49	return NULL;
50}
51EXPORT_SYMBOL_GPL(aoa_get_card);
52
53void aoa_alsa_cleanup(void)
54{
55	if (aoa_card) {
56		snd_card_free(aoa_card->alsa_card);
57		aoa_card = NULL;
58	}
59}
60
61int aoa_snd_device_new(enum snd_device_type type,
62		       void *device_data, const struct snd_device_ops *ops)
63{
64	struct snd_card *card = aoa_get_card();
65	int err;
66
67	if (!card) return -ENOMEM;
68
69	err = snd_device_new(card, type, device_data, ops);
70	if (err) {
71		printk(KERN_ERR "snd-aoa: failed to create snd device (%d)\n", err);
72		return err;
73	}
74	err = snd_device_register(card, device_data);
75	if (err) {
76		printk(KERN_ERR "snd-aoa: failed to register "
77				"snd device (%d)\n", err);
78		printk(KERN_ERR "snd-aoa: have you forgotten the "
79				"dev_register callback?\n");
80		snd_device_free(card, device_data);
81	}
82	return err;
83}
84EXPORT_SYMBOL_GPL(aoa_snd_device_new);
85
86int aoa_snd_ctl_add(struct snd_kcontrol* control)
87{
88	int err;
89
90	if (!aoa_card) return -ENODEV;
91
92	err = snd_ctl_add(aoa_card->alsa_card, control);
93	if (err)
94		printk(KERN_ERR "snd-aoa: failed to add alsa control (%d)\n",
95		       err);
96	return err;
97}
98EXPORT_SYMBOL_GPL(aoa_snd_ctl_add);
99