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
  38 static struct snd_soc_card bf5xx_ad1836;
  39
  40 static 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
  49 static 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         unsigned int channel_map[] = {0, 4, 1, 5, 2, 6, 3, 7};
  56         int ret = 0;
  57         /* set cpu DAI configuration */
  58         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
  59                 SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
  60         if (ret < 0)
  61                 return ret;
  62
  63         /* set codec DAI configuration */
  64         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_A |
  65                 SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
  66         if (ret < 0)
  67                 return ret;
  68
  69         /* set cpu DAI channel mapping */
  70         ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
  71                 channel_map, ARRAY_SIZE(channel_map), channel_map);
  72         if (ret < 0)
  73                 return ret;
  74
  75         return 0;
  76 }
  77
  78 static struct snd_soc_ops bf5xx_ad1836_ops = {
  79         .startup = bf5xx_ad1836_startup,
  80         .hw_params = bf5xx_ad1836_hw_params,
  81 };
  82
  83 static struct snd_soc_dai_link bf5xx_ad1836_dai = {
  84         .name = "ad1836",
  85         .stream_name = "AD1836",
  86         .cpu_dai = &bf5xx_tdm_dai,
  87         .codec_dai = &ad1836_dai,
  88         .ops = &bf5xx_ad1836_ops,
  89 };
  90
  91 static struct snd_soc_card bf5xx_ad1836 = {
  92         .name = "bf5xx_ad1836",
  93         .platform = &bf5xx_tdm_soc_platform,
  94         .dai_link = &bf5xx_ad1836_dai,
  95         .num_links = 1,
  96 };
  97
  98 static struct snd_soc_device bf5xx_ad1836_snd_devdata = {
  99         .card = &bf5xx_ad1836,
 100         .codec_dev = &soc_codec_dev_ad1836,
 101 };
 102
 103 static struct platform_device *bfxx_ad1836_snd_device;
 104
 105 static int __init bf5xx_ad1836_init(void)
 106 {
 107         int ret;
 108
 109         bfxx_ad1836_snd_device = platform_device_alloc("soc-audio", -1);
 110         if (!bfxx_ad1836_snd_device)
 111                 return -ENOMEM;
 112
 113         platform_set_drvdata(bfxx_ad1836_snd_device, &bf5xx_ad1836_snd_devdata);
 114         bf5xx_ad1836_snd_devdata.dev = &bfxx_ad1836_snd_device->dev;
 115         ret = platform_device_add(bfxx_ad1836_snd_device);
 116
 117         if (ret)
 118                 platform_device_put(bfxx_ad1836_snd_device);
 119
 120         return ret;
 121 }
 122
 123 static void __exit bf5xx_ad1836_exit(void)
 124 {
 125         platform_device_unregister(bfxx_ad1836_snd_device);
 126 }
 127
 128 module_init(bf5xx_ad1836_init);
 129 module_exit(bf5xx_ad1836_exit);
 130
 131 /* Module information */
 132 MODULE_AUTHOR("Barry Song");
 133 MODULE_DESCRIPTION("ALSA SoC AD1836 board driver");
 134 MODULE_LICENSE("GPL");
 135