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
  37 static struct snd_soc_card bf5xx_ad1836;
  38
  39 static 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
  48 static 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
  77 static struct snd_soc_ops bf5xx_ad1836_ops = {
  78         .startup = bf5xx_ad1836_startup,
  79         .hw_params = bf5xx_ad1836_hw_params,
  80 };
  81
  82 static 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
  92 static struct snd_soc_card bf5xx_ad1836 = {
  93         .name = "bf5xx_ad1836",
  94         .dai_link = &bf5xx_ad1836_dai,
  95         .num_links = 1,
  96 };
  97
  98 static struct platform_device *bfxx_ad1836_snd_device;
  99
 100 static 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
 117 static void __exit bf5xx_ad1836_exit(void)
 118 {
 119         platform_device_unregister(bfxx_ad1836_snd_device);
 120 }
 121
 122 module_init(bf5xx_ad1836_init);
 123 module_exit(bf5xx_ad1836_exit);
 124
 125 /* Module information */
 126 MODULE_AUTHOR("Barry Song");
 127 MODULE_DESCRIPTION("ALSA SoC AD1836 board driver");
 128 MODULE_LICENSE("GPL");
 129