LXR linux/sound/soc/blackfin/bf5xx-ad1836.c

   1/*
   2 * File:         sound/soc/blackfin/bf5xx-ad1836.c
   3 * Author:       Barry Song <Barry.Song@analog.com>
   4 *
   5 * Created:      Aug 4 2009
   6 * Description:  Board driver for ad1836 sound chip
   7 *
   8 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License as published by
  12 * the Free Software Foundation; either version 2 of the License, or
  13 * (at your option) any later version.
  14 *
  15 */
  16
  17#include <linux/module.h>
  18#include <linux/moduleparam.h>
  19#include <linux/device.h>
  20#include <sound/core.h>
  21#include <sound/pcm.h>
  22#include <sound/soc.h>
  23#include <sound/soc-dapm.h>
  24#include <sound/pcm_params.h>
  25
  26#include <asm/blackfin.h>
  27#include <asm/cacheflush.h>
  28#include <asm/irq.h>
  29#include <asm/dma.h>
  30#include <asm/portmux.h>
  31
  32#include "../codecs/ad1836.h"
  33#include "bf5xx-sport.h"
  34
  35#include "bf5xx-tdm-pcm.h"
  36#include "bf5xx-tdm.h"
  37
  38static struct snd_soc_card bf5xx_ad1836;
  39
  40static int bf5xx_ad1836_startup(struct snd_pcm_substream *substream)
  41{
  42        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  43        struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  44
  45        cpu_dai->private_data = sport_handle;
  46        return 0;
  47}
  48
  49static int bf5xx_ad1836_hw_params(struct snd_pcm_substream *substream,
  50        struct snd_pcm_hw_params *params)
  51{
  52        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  53        struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  54        struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  55        int ret = 0;
  56        /* set cpu DAI configuration */
  57        ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
  58                SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
  59        if (ret < 0)
  60                return ret;
  61
  62        /* set codec DAI configuration */
  63        ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_A |
  64                SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
  65        if (ret < 0)
  66                return ret;
  67
  68        return 0;
  69}
  70
  71static struct snd_soc_ops bf5xx_ad1836_ops = {
  72        .startup = bf5xx_ad1836_startup,
  73        .hw_params = bf5xx_ad1836_hw_params,
  74};
  75
  76static struct snd_soc_dai_link bf5xx_ad1836_dai = {
  77        .name = "ad1836",
  78        .stream_name = "AD1836",
  79        .cpu_dai = &bf5xx_tdm_dai,
  80        .codec_dai = &ad1836_dai,
  81        .ops = &bf5xx_ad1836_ops,
  82};
  83
  84static struct snd_soc_card bf5xx_ad1836 = {
  85        .name = "bf5xx_ad1836",
  86        .platform = &bf5xx_tdm_soc_platform,
  87        .dai_link = &bf5xx_ad1836_dai,
  88        .num_links = 1,
  89};
  90
  91static struct snd_soc_device bf5xx_ad1836_snd_devdata = {
  92        .card = &bf5xx_ad1836,
  93        .codec_dev = &soc_codec_dev_ad1836,
  94};
  95
  96static struct platform_device *bfxx_ad1836_snd_device;
  97
  98static int __init bf5xx_ad1836_init(void)
  99{
 100        int ret;
 101
 102        bfxx_ad1836_snd_device = platform_device_alloc("soc-audio", -1);
 103        if (!bfxx_ad1836_snd_device)
 104                return -ENOMEM;
 105
 106        platform_set_drvdata(bfxx_ad1836_snd_device, &bf5xx_ad1836_snd_devdata);
 107        bf5xx_ad1836_snd_devdata.dev = &bfxx_ad1836_snd_device->dev;
 108        ret = platform_device_add(bfxx_ad1836_snd_device);
 109
 110        if (ret)
 111                platform_device_put(bfxx_ad1836_snd_device);
 112
 113        return ret;
 114}
 115
 116static void __exit bf5xx_ad1836_exit(void)
 117{
 118        platform_device_unregister(bfxx_ad1836_snd_device);
 119}
 120
 121module_init(bf5xx_ad1836_init);
 122module_exit(bf5xx_ad1836_exit);
 123
 124/* Module information */
 125MODULE_AUTHOR("Barry Song");
 126MODULE_DESCRIPTION("ALSA SoC AD1836 board driver");
 127MODULE_LICENSE("GPL");
 128
 129