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Linux/sound/soc/kirkwood/kirkwood-openrd.c

  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 <linux/platform_data/asoc-kirkwood.h>
 20 #include "../codecs/cs42l51.h"
 21 
 22 static int openrd_client_hw_params(struct snd_pcm_substream *substream,
 23                 struct snd_pcm_hw_params *params)
 24 {
 25         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 26         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 27         unsigned int freq;
 28 
 29         switch (params_rate(params)) {
 30         default:
 31         case 44100:
 32                 freq = 11289600;
 33                 break;
 34         case 48000:
 35                 freq = 12288000;
 36                 break;
 37         case 96000:
 38                 freq = 24576000;
 39                 break;
 40         }
 41 
 42         return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);
 43 
 44 }
 45 
 46 static struct snd_soc_ops openrd_client_ops = {
 47         .hw_params = openrd_client_hw_params,
 48 };
 49 
 50 
 51 static struct snd_soc_dai_link openrd_client_dai[] = {
 52 {
 53         .name = "CS42L51",
 54         .stream_name = "CS42L51 HiFi",
 55         .cpu_dai_name = "i2s",
 56         .platform_name = "mvebu-audio",
 57         .codec_dai_name = "cs42l51-hifi",
 58         .codec_name = "cs42l51-codec.0-004a",
 59         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS,
 60         .ops = &openrd_client_ops,
 61 },
 62 };
 63 
 64 
 65 static struct snd_soc_card openrd_client = {
 66         .name = "OpenRD Client",
 67         .owner = THIS_MODULE,
 68         .dai_link = openrd_client_dai,
 69         .num_links = ARRAY_SIZE(openrd_client_dai),
 70 };
 71 
 72 static int openrd_probe(struct platform_device *pdev)
 73 {
 74         struct snd_soc_card *card = &openrd_client;
 75         int ret;
 76 
 77         card->dev = &pdev->dev;
 78 
 79         ret = snd_soc_register_card(card);
 80         if (ret)
 81                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 82                         ret);
 83         return ret;
 84 }
 85 
 86 static int openrd_remove(struct platform_device *pdev)
 87 {
 88         struct snd_soc_card *card = platform_get_drvdata(pdev);
 89 
 90         snd_soc_unregister_card(card);
 91         return 0;
 92 }
 93 
 94 static struct platform_driver openrd_driver = {
 95         .driver         = {
 96                 .name   = "openrd-client-audio",
 97                 .owner  = THIS_MODULE,
 98         },
 99         .probe          = openrd_probe,
100         .remove         = openrd_remove,
101 };
102 
103 module_platform_driver(openrd_driver);
104 
105 /* Module information */
106 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
107 MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
108 MODULE_LICENSE("GPL");
109 MODULE_ALIAS("platform:openrd-client-audio");
110 

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