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