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 <mach/kirkwood.h>
  20#include <linux/platform_data/asoc-kirkwood.h>
  21#include <asm/mach-types.h>
  22#include "../codecs/cs42l51.h"
  23
  24static 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
  48static struct snd_soc_ops openrd_client_ops = {
  49        .hw_params = openrd_client_hw_params,
  50};
  51
  52
  53static 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
  67static 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
  74static int openrd_probe(struct platform_device *pdev)
  75{
  76        struct snd_soc_card *card = &openrd_client;
  77        int ret;
  78
  79        card->dev = &pdev->dev;
  80
  81        ret = snd_soc_register_card(card);
  82        if (ret)
  83                dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
  84                        ret);
  85        return ret;
  86}
  87
  88static int openrd_remove(struct platform_device *pdev)
  89{
  90        struct snd_soc_card *card = platform_get_drvdata(pdev);
  91
  92        snd_soc_unregister_card(card);
  93        return 0;
  94}
  95
  96static struct platform_driver openrd_driver = {
  97        .driver         = {
  98                .name   = "openrd-client-audio",
  99                .owner  = THIS_MODULE,
 100        },
 101        .probe          = openrd_probe,
 102        .remove         = openrd_remove,
 103};
 104
 105module_platform_driver(openrd_driver);
 106
 107/* Module information */
 108MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
 109MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
 110MODULE_LICENSE("GPL");
 111MODULE_ALIAS("platform:openrd-client-audio");
 112