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apatard@mandriva.com2e8693e2010-05-31 13:49:15 +02001/*
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>
apatard@mandriva.com2e8693e2010-05-31 13:49:15 +020021#include "../codecs/cs42l51.h"
22
23static 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;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000027 struct snd_soc_dai *codec_dai = rtd->codec_dai;
28 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
apatard@mandriva.com2e8693e2010-05-31 13:49:15 +020029 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
58static struct snd_soc_ops openrd_client_ops = {
59 .hw_params = openrd_client_hw_params,
60};
61
62
63static struct snd_soc_dai_link openrd_client_dai[] = {
64{
65 .name = "CS42L51",
66 .stream_name = "CS42L51 HiFi",
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000067 .cpu_dai_name = "kirkwood-i2s",
68 .platform_name = "kirkwood-pcm-audio",
Arnaud Patard (Rtp)c88e7b92010-08-30 16:00:05 +020069 .codec_dai_name = "cs42l51-hifi",
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000070 .codec_name = "cs42l51-codec.0-004a",
apatard@mandriva.com2e8693e2010-05-31 13:49:15 +020071 .ops = &openrd_client_ops,
72},
73};
74
75
76static struct snd_soc_card openrd_client = {
77 .name = "OpenRD Client",
apatard@mandriva.com2e8693e2010-05-31 13:49:15 +020078 .dai_link = openrd_client_dai,
79 .num_links = ARRAY_SIZE(openrd_client_dai),
80};
81
apatard@mandriva.com2e8693e2010-05-31 13:49:15 +020082static struct platform_device *openrd_client_snd_device;
83
84static 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,
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000096 &openrd_client);
apatard@mandriva.com2e8693e2010-05-31 13:49:15 +020097
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
107static void __exit openrd_client_exit(void)
108{
109 platform_device_unregister(openrd_client_snd_device);
110}
111
112module_init(openrd_client_init);
113module_exit(openrd_client_exit);
114
115/* Module information */
116MODULE_AUTHOR("Arnaud Patard <apatard@mandriva.com>");
117MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
118MODULE_LICENSE("GPL");
119MODULE_ALIAS("platform:soc-audio");