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/pcm_params.h>
  24
  25#include <asm/blackfin.h>
  26#include <asm/cacheflush.h>
  27#include <asm/irq.h>
  28#include <asm/dma.h>
  29#include <asm/portmux.h>
  30
  31#include "../codecs/ad1836.h"
  32#include "bf5xx-sport.h"
  33
  34#include "bf5xx-tdm-pcm.h"
  35#include "bf5xx-tdm.h"
  36
  37static struct snd_soc_card bf5xx_ad1836;
  38
  39static int bf5xx_ad1836_startup(struct snd_pcm_substream *substream)
  40{
  41        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  42        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  43
  44        snd_soc_dai_set_drvdata(cpu_dai, sport_handle);
  45        return 0;
  46}
  47
  48static int bf5xx_ad1836_hw_params(struct snd_pcm_substream *substream,
  49        struct snd_pcm_hw_params *params)
  50{
  51        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  52        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  53        struct snd_soc_dai *codec_dai = rtd->codec_dai;
  54        unsigned int channel_map[] = {0, 4, 1, 5, 2, 6, 3, 7};
  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        /* set cpu DAI channel mapping */
  69        ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
  70                channel_map, ARRAY_SIZE(channel_map), channel_map);
  71        if (ret < 0)
  72                return ret;
  73
  74        return 0;
  75}
  76
  77static struct snd_soc_ops bf5xx_ad1836_ops = {
  78        .startup = bf5xx_ad1836_startup,
  79        .hw_params = bf5xx_ad1836_hw_params,
  80};
  81
  82static struct snd_soc_dai_link bf5xx_ad1836_dai = {
  83        .name = "ad1836",
  84        .stream_name = "AD1836",
  85        .cpu_dai_name = "bf5xx-tdm",
  86        .codec_dai_name = "ad1836-hifi",
  87        .platform_name = "bf5xx-tdm-pcm-audio",
  88        .codec_name = "ad1836-codec.0",
  89        .ops = &bf5xx_ad1836_ops,
  90};
  91
  92static struct snd_soc_card bf5xx_ad1836 = {
  93        .name = "bf5xx_ad1836",
  94        .dai_link = &bf5xx_ad1836_dai,
  95        .num_links = 1,
  96};
  97
  98static struct platform_device *bfxx_ad1836_snd_device;
  99
 100static int __init bf5xx_ad1836_init(void)
 101{
 102        int ret;
 103
 104        bfxx_ad1836_snd_device = platform_device_alloc("soc-audio", -1);
 105        if (!bfxx_ad1836_snd_device)
 106                return -ENOMEM;
 107
 108        platform_set_drvdata(bfxx_ad1836_snd_device, &bf5xx_ad1836);
 109        ret = platform_device_add(bfxx_ad1836_snd_device);
 110
 111        if (ret)
 112                platform_device_put(bfxx_ad1836_snd_device);
 113
 114        return ret;
 115}
 116
 117static void __exit bf5xx_ad1836_exit(void)
 118{
 119        platform_device_unregister(bfxx_ad1836_snd_device);
 120}
 121
 122module_init(bf5xx_ad1836_init);
 123module_exit(bf5xx_ad1836_exit);
 124
 125/* Module information */
 126MODULE_AUTHOR("Barry Song");
 127MODULE_DESCRIPTION("ALSA SoC AD1836 board driver");
 128MODULE_LICENSE("GPL");
 129
 130