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->cpu_dai;
  44
  45         snd_soc_dai_set_drvdata(cpu_dai, 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->cpu_dai;
  54         struct snd_soc_dai *codec_dai = rtd->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_name = "bf5xx-tdm",
  87         .codec_dai_name = "ad1836-hifi",
  88         .platform_name = "bf5xx-tdm-pcm-audio",
  89         .codec_name = "ad1836-codec.0",
  90         .ops = &bf5xx_ad1836_ops,
  91 };
  92
  93 static struct snd_soc_card bf5xx_ad1836 = {
  94         .name = "bf5xx_ad1836",
  95         .dai_link = &bf5xx_ad1836_dai,
  96         .num_links = 1,
  97 };
  98
  99 static struct platform_device *bfxx_ad1836_snd_device;
 100
 101 static int __init bf5xx_ad1836_init(void)
 102 {
 103         int ret;
 104
 105         bfxx_ad1836_snd_device = platform_device_alloc("soc-audio", -1);
 106         if (!bfxx_ad1836_snd_device)
 107                 return -ENOMEM;
 108
 109         platform_set_drvdata(bfxx_ad1836_snd_device, &bf5xx_ad1836);
 110         ret = platform_device_add(bfxx_ad1836_snd_device);
 111
 112         if (ret)
 113                 platform_device_put(bfxx_ad1836_snd_device);
 114
 115         return ret;
 116 }
 117
 118 static void __exit bf5xx_ad1836_exit(void)
 119 {
 120         platform_device_unregister(bfxx_ad1836_snd_device);
 121 }
 122
 123 module_init(bf5xx_ad1836_init);
 124 module_exit(bf5xx_ad1836_exit);
 125
 126 /* Module information */
 127 MODULE_AUTHOR("Barry Song");
 128 MODULE_DESCRIPTION("ALSA SoC AD1836 board driver");
 129 MODULE_LICENSE("GPL");
 130