ASoC: core: Remove useless kfree
[linux-3.10.git] / sound / soc / generic / simple-card.c
1 /*
2  * ASoC simple sound card support
3  *
4  * Copyright (C) 2012 Renesas Solutions Corp.
5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11
12 #include <linux/platform_device.h>
13 #include <linux/module.h>
14 #include <sound/simple_card.h>
15
16 #define asoc_simple_get_card_info(p) \
17         container_of(p->dai_link, struct asoc_simple_card_info, snd_link)
18
19 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
20 {
21         struct asoc_simple_card_info *cinfo = asoc_simple_get_card_info(rtd);
22         struct asoc_simple_dai_init_info *iinfo = cinfo->init;
23         struct snd_soc_dai *codec = rtd->codec_dai;
24         struct snd_soc_dai *cpu = rtd->cpu_dai;
25         unsigned int cpu_daifmt = iinfo->fmt | iinfo->cpu_daifmt;
26         unsigned int codec_daifmt = iinfo->fmt | iinfo->codec_daifmt;
27         int ret;
28
29         if (codec_daifmt) {
30                 ret = snd_soc_dai_set_fmt(codec, codec_daifmt);
31                 if (ret < 0)
32                         return ret;
33         }
34
35         if (iinfo->sysclk) {
36                 ret = snd_soc_dai_set_sysclk(codec, 0, iinfo->sysclk, 0);
37                 if (ret < 0)
38                         return ret;
39         }
40
41         if (cpu_daifmt) {
42                 ret = snd_soc_dai_set_fmt(cpu, cpu_daifmt);
43                 if (ret < 0)
44                         return ret;
45         }
46
47         return 0;
48 }
49
50 static int asoc_simple_card_probe(struct platform_device *pdev)
51 {
52         struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
53
54         if (!cinfo) {
55                 dev_err(&pdev->dev, "no info for asoc-simple-card\n");
56                 return -EINVAL;
57         }
58
59         if (!cinfo->name        ||
60             !cinfo->card        ||
61             !cinfo->cpu_dai     ||
62             !cinfo->codec       ||
63             !cinfo->platform    ||
64             !cinfo->codec_dai) {
65                 dev_err(&pdev->dev, "insufficient asoc_simple_card_info settings\n");
66                 return -EINVAL;
67         }
68
69         /*
70          * init snd_soc_dai_link
71          */
72         cinfo->snd_link.name            = cinfo->name;
73         cinfo->snd_link.stream_name     = cinfo->name;
74         cinfo->snd_link.cpu_dai_name    = cinfo->cpu_dai;
75         cinfo->snd_link.platform_name   = cinfo->platform;
76         cinfo->snd_link.codec_name      = cinfo->codec;
77         cinfo->snd_link.codec_dai_name  = cinfo->codec_dai;
78
79         /* enable snd_link.init if cinfo has settings */
80         if (cinfo->init)
81                 cinfo->snd_link.init    = asoc_simple_card_dai_init;
82
83         /*
84          * init snd_soc_card
85          */
86         cinfo->snd_card.name            = cinfo->card;
87         cinfo->snd_card.owner           = THIS_MODULE;
88         cinfo->snd_card.dai_link        = &cinfo->snd_link;
89         cinfo->snd_card.num_links       = 1;
90         cinfo->snd_card.dev             = &pdev->dev;
91
92         return snd_soc_register_card(&cinfo->snd_card);
93 }
94
95 static int asoc_simple_card_remove(struct platform_device *pdev)
96 {
97         struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
98
99         return snd_soc_unregister_card(&cinfo->snd_card);
100 }
101
102 static struct platform_driver asoc_simple_card = {
103         .driver = {
104                 .name   = "asoc-simple-card",
105         },
106         .probe          = asoc_simple_card_probe,
107         .remove         = asoc_simple_card_remove,
108 };
109
110 module_platform_driver(asoc_simple_card);
111
112 MODULE_LICENSE("GPL");
113 MODULE_DESCRIPTION("ASoC Simple Sound Card");
114 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");