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(parent: dev, idx: index, xid: name, module: mod, extra_size: sizeof(struct aoa_card), |
26 | card_ret: &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(card: aoa_card->alsa_card); |
36 | if (err < 0) { |
37 | printk(KERN_ERR "snd-aoa: couldn't register alsa card\n" ); |
38 | snd_card_free(card: 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(card: 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(card: aoa_card->alsa_card, kcontrol: 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 | |