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
  33 #include "bf5xx-tdm-pcm.h"
  34 #include "bf5xx-tdm.h"
  35
  36 static struct snd_soc_card bf5xx_ad1836;
  37
  38 static int bf5xx_ad1836_hw_params(struct snd_pcm_substream *substream,
  39         struct snd_pcm_hw_params *params)
  40 {
  41         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  42         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  43         unsigned int channel_map[] = {0, 4, 1, 5, 2, 6, 3, 7};
  44         int ret = 0;
  45
  46         /* set cpu DAI channel mapping */
  47         ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
  48                 channel_map, ARRAY_SIZE(channel_map), channel_map);
  49         if (ret < 0)
  50                 return ret;
  51
  52         return 0;
  53 }
  54
  55 static struct snd_soc_ops bf5xx_ad1836_ops = {
  56         .hw_params = bf5xx_ad1836_hw_params,
  57 };
  58
  59 #define BF5XX_AD1836_DAIFMT (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_IF | \
  60                                 SND_SOC_DAIFMT_CBM_CFM)
  61
  62 static struct snd_soc_dai_link bf5xx_ad1836_dai[] = {
  63         {
  64                 .name = "ad1836",
  65                 .stream_name = "AD1836",
  66                 .cpu_dai_name = "bfin-tdm.0",
  67                 .codec_dai_name = "ad1836-hifi",
  68                 .platform_name = "bfin-tdm-pcm-audio",
  69                 .codec_name = "spi0.4",
  70                 .ops = &bf5xx_ad1836_ops,
  71                 .dai_fmt = BF5XX_AD1836_DAIFMT,
  72         },
  73         {
  74                 .name = "ad1836",
  75                 .stream_name = "AD1836",
  76                 .cpu_dai_name = "bfin-tdm.1",
  77                 .codec_dai_name = "ad1836-hifi",
  78                 .platform_name = "bfin-tdm-pcm-audio",
  79                 .codec_name = "spi0.4",
  80                 .ops = &bf5xx_ad1836_ops,
  81                 .dai_fmt = BF5XX_AD1836_DAIFMT,
  82         },
  83 };
  84
  85 static struct snd_soc_card bf5xx_ad1836 = {
  86         .name = "bfin-ad1836",
  87         .owner = THIS_MODULE,
  88         .dai_link = &bf5xx_ad1836_dai[CONFIG_SND_BF5XX_SPORT_NUM],
  89         .num_links = 1,
  90 };
  91
  92 static struct platform_device *bfxx_ad1836_snd_device;
  93
  94 static int __init bf5xx_ad1836_init(void)
  95 {
  96         int ret;
  97
  98         bfxx_ad1836_snd_device = platform_device_alloc("soc-audio", -1);
  99         if (!bfxx_ad1836_snd_device)
 100                 return -ENOMEM;
 101
 102         platform_set_drvdata(bfxx_ad1836_snd_device, &bf5xx_ad1836);
 103         ret = platform_device_add(bfxx_ad1836_snd_device);
 104
 105         if (ret)
 106                 platform_device_put(bfxx_ad1836_snd_device);
 107
 108         return ret;
 109 }
 110
 111 static void __exit bf5xx_ad1836_exit(void)
 112 {
 113         platform_device_unregister(bfxx_ad1836_snd_device);
 114 }
 115
 116 module_init(bf5xx_ad1836_init);
 117 module_exit(bf5xx_ad1836_exit);
 118
 119 /* Module information */
 120 MODULE_AUTHOR("Barry Song");
 121 MODULE_DESCRIPTION("ALSA SoC AD1836 board driver");
 122 MODULE_LICENSE("GPL");
 123