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 static struct snd_soc_card bf5xx_ad1836;
  34
  35 static int bf5xx_ad1836_init(struct snd_soc_pcm_runtime *rtd)
  36 {
  37         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  38         unsigned int channel_map[] = {0, 4, 1, 5, 2, 6, 3, 7};
  39         int ret = 0;
  40
  41         /* set cpu DAI channel mapping */
  42         ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
  43                 channel_map, ARRAY_SIZE(channel_map), channel_map);
  44         if (ret < 0)
  45                 return ret;
  46
  47         ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0xFF, 0xFF, 8, 32);
  48         if (ret < 0)
  49                 return ret;
  50
  51         return 0;
  52 }
  53
  54 #define BF5XX_AD1836_DAIFMT (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_IF | \
  55                                 SND_SOC_DAIFMT_CBM_CFM)
  56
  57 static struct snd_soc_dai_link bf5xx_ad1836_dai = {
  58         .name = "ad1836",
  59         .stream_name = "AD1836",
  60         .codec_dai_name = "ad1836-hifi",
  61         .platform_name = "bfin-i2s-pcm-audio",
  62         .dai_fmt = BF5XX_AD1836_DAIFMT,
  63         .init = bf5xx_ad1836_init,
  64 };
  65
  66 static struct snd_soc_card bf5xx_ad1836 = {
  67         .name = "bfin-ad1836",
  68         .owner = THIS_MODULE,
  69         .dai_link = &bf5xx_ad1836_dai,
  70         .num_links = 1,
  71 };
  72
  73 static int bf5xx_ad1836_driver_probe(struct platform_device *pdev)
  74 {
  75         struct snd_soc_card *card = &bf5xx_ad1836;
  76         const char **link_name;
  77         int ret;
  78
  79         link_name = pdev->dev.platform_data;
  80         if (!link_name) {
  81                 dev_err(&pdev->dev, "No platform data supplied\n");
  82                 return -EINVAL;
  83         }
  84         bf5xx_ad1836_dai.cpu_dai_name = link_name[0];
  85         bf5xx_ad1836_dai.codec_name = link_name[1];
  86
  87         card->dev = &pdev->dev;
  88         platform_set_drvdata(pdev, card);
  89
  90         ret = snd_soc_register_card(card);
  91         if (ret)
  92                 dev_err(&pdev->dev, "Failed to register card\n");
  93         return ret;
  94 }
  95
  96 static int bf5xx_ad1836_driver_remove(struct platform_device *pdev)
  97 {
  98         struct snd_soc_card *card = platform_get_drvdata(pdev);
  99
 100         snd_soc_unregister_card(card);
 101         return 0;
 102 }
 103
 104 static struct platform_driver bf5xx_ad1836_driver = {
 105         .driver = {
 106                 .name = "bfin-snd-ad1836",
 107                 .pm = &snd_soc_pm_ops,
 108         },
 109         .probe = bf5xx_ad1836_driver_probe,
 110         .remove = bf5xx_ad1836_driver_remove,
 111 };
 112 module_platform_driver(bf5xx_ad1836_driver);
 113
 114 /* Module information */
 115 MODULE_AUTHOR("Barry Song");
 116 MODULE_DESCRIPTION("ALSA SoC AD1836 board driver");
 117 MODULE_LICENSE("GPL");
 118