LXR 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
  22static 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
  46static struct snd_soc_ops openrd_client_ops = {
  47        .hw_params = openrd_client_hw_params,
  48};
  49
  50
  51static 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
  65static 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
  72static 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
  86static 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
  94static 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
 103module_platform_driver(openrd_driver);
 104
 105/* Module information */
 106MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
 107MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
 108MODULE_LICENSE("GPL");
 109MODULE_ALIAS("platform:openrd-client-audio");
 110