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