cc1a1e277edf384bba0c4f1b67dcfc7684dfc3c8
[linux-2.6.git] / sound / soc / kirkwood / kirkwood-openrd.c
1 /*
2  * kirkwood-openrd.c
3  *
4  * (c) 2010 Arnaud Patard <apatard@mandriva.com>
5  *
6  *  This program is free software; you can redistribute  it and/or modify it
7  *  under  the terms of  the GNU General  Public License as published by the
8  *  Free Software Foundation;  either version 2 of the  License, or (at your
9  *  option) any later version.
10  */
11
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/interrupt.h>
15 #include <linux/platform_device.h>
16 #include <linux/slab.h>
17 #include <sound/soc.h>
18 #include <mach/kirkwood.h>
19 #include <plat/audio.h>
20 #include <asm/mach-types.h>
21 #include "../codecs/cs42l51.h"
22
23 static int openrd_client_hw_params(struct snd_pcm_substream *substream,
24                 struct snd_pcm_hw_params *params)
25 {
26         struct snd_soc_pcm_runtime *rtd = substream->private_data;
27         struct snd_soc_dai *codec_dai = rtd->codec_dai;
28         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
29         int ret;
30         unsigned int freq, fmt;
31
32         fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;
33         ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
34         if (ret < 0)
35                 return ret;
36
37         ret = snd_soc_dai_set_fmt(codec_dai, fmt);
38         if (ret < 0)
39                 return ret;
40
41         switch (params_rate(params)) {
42         default:
43         case 44100:
44                 freq = 11289600;
45                 break;
46         case 48000:
47                 freq = 12288000;
48                 break;
49         case 96000:
50                 freq = 24576000;
51                 break;
52         }
53
54         return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);
55
56 }
57
58 static struct snd_soc_ops openrd_client_ops = {
59         .hw_params = openrd_client_hw_params,
60 };
61
62
63 static struct snd_soc_dai_link openrd_client_dai[] = {
64 {
65         .name = "CS42L51",
66         .stream_name = "CS42L51 HiFi",
67         .cpu_dai_name = "kirkwood-i2s",
68         .platform_name = "kirkwood-pcm-audio",
69         .codec_dai_name = "cs42l51_hifi",
70         .codec_name = "cs42l51-codec.0-004a",
71         .ops = &openrd_client_ops,
72 },
73 };
74
75
76 static struct snd_soc_card openrd_client = {
77         .name = "OpenRD Client",
78         .dai_link = openrd_client_dai,
79         .num_links = ARRAY_SIZE(openrd_client_dai),
80 };
81
82 static struct platform_device *openrd_client_snd_device;
83
84 static int __init openrd_client_init(void)
85 {
86         int ret;
87
88         if (!machine_is_openrd_client())
89                 return 0;
90
91         openrd_client_snd_device = platform_device_alloc("soc-audio", -1);
92         if (!openrd_client_snd_device)
93                 return -ENOMEM;
94
95         platform_set_drvdata(openrd_client_snd_device,
96                         &openrd_client);
97
98         ret = platform_device_add(openrd_client_snd_device);
99         if (ret) {
100                 printk(KERN_ERR "%s: platform_device_add failed\n", __func__);
101                 platform_device_put(openrd_client_snd_device);
102         }
103
104         return ret;
105 }
106
107 static void __exit openrd_client_exit(void)
108 {
109         platform_device_unregister(openrd_client_snd_device);
110 }
111
112 module_init(openrd_client_init);
113 module_exit(openrd_client_exit);
114
115 /* Module information */
116 MODULE_AUTHOR("Arnaud Patard <apatard@mandriva.com>");
117 MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
118 MODULE_LICENSE("GPL");
119 MODULE_ALIAS("platform:soc-audio");