sound/soc/generic/simple-card.c

   1 /*
   2  * ASoC simple sound card support
   3  *
   4  * Copyright (C) 2012 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/platform_device.h>
  13 #include <linux/module.h>
  14 #include <sound/simple_card.h>
  15
  16 #define asoc_simple_get_card_info(p) \
  17         container_of(p->dai_link, struct asoc_simple_card_info, snd_link)
  18
  19 static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
  20                                        struct asoc_simple_dai *set,
  21                                        unsigned int daifmt)
  22 {
  23         int ret = 0;
  24
  25         daifmt |= set->fmt;
  26
  27         if (!ret && daifmt)
  28                 ret = snd_soc_dai_set_fmt(dai, daifmt);
  29
  30         if (ret == -ENOTSUPP) {
  31                 dev_dbg(dai->dev, "ASoC: set_fmt is not supported\n");
  32                 ret = 0;
  33         }
  34
  35         if (!ret && set->sysclk)
  36                 ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
  37
  38         return ret;
  39 }
  40
  41 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
  42 {
  43         struct asoc_simple_card_info *info = asoc_simple_get_card_info(rtd);
  44         struct snd_soc_dai *codec = rtd->codec_dai;
  45         struct snd_soc_dai *cpu = rtd->cpu_dai;
  46         unsigned int daifmt = info->daifmt;
  47         int ret;
  48
  49         ret = __asoc_simple_card_dai_init(codec, &info->codec_dai, daifmt);
  50         if (ret < 0)
  51                 return ret;
  52
  53         ret = __asoc_simple_card_dai_init(cpu, &info->cpu_dai, daifmt);
  54         if (ret < 0)
  55                 return ret;
  56
  57         return 0;
  58 }
  59
  60 static int asoc_simple_card_probe(struct platform_device *pdev)
  61 {
  62         struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
  63         struct device *dev = &pdev->dev;
  64
  65         if (!cinfo) {
  66                 dev_err(dev, "no info for asoc-simple-card\n");
  67                 return -EINVAL;
  68         }
  69
  70         if (!cinfo->name        ||
  71             !cinfo->card        ||
  72             !cinfo->codec       ||
  73             !cinfo->platform    ||
  74             !cinfo->cpu_dai.name ||
  75             !cinfo->codec_dai.name) {
  76                 dev_err(dev, "insufficient asoc_simple_card_info settings\n");
  77                 return -EINVAL;
  78         }
  79
  80         /*
  81          * init snd_soc_dai_link
  82          */
  83         cinfo->snd_link.name            = cinfo->name;
  84         cinfo->snd_link.stream_name     = cinfo->name;
  85         cinfo->snd_link.cpu_dai_name    = cinfo->cpu_dai.name;
  86         cinfo->snd_link.platform_name   = cinfo->platform;
  87         cinfo->snd_link.codec_name      = cinfo->codec;
  88         cinfo->snd_link.codec_dai_name  = cinfo->codec_dai.name;
  89         cinfo->snd_link.init            = asoc_simple_card_dai_init;
  90
  91         /*
  92          * init snd_soc_card
  93          */
  94         cinfo->snd_card.name            = cinfo->card;
  95         cinfo->snd_card.owner           = THIS_MODULE;
  96         cinfo->snd_card.dai_link        = &cinfo->snd_link;
  97         cinfo->snd_card.num_links       = 1;
  98         cinfo->snd_card.dev             = &pdev->dev;
  99
 100         return snd_soc_register_card(&cinfo->snd_card);
 101 }
 102
 103 static int asoc_simple_card_remove(struct platform_device *pdev)
 104 {
 105         struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
 106
 107         return snd_soc_unregister_card(&cinfo->snd_card);
 108 }
 109
 110 static struct platform_driver asoc_simple_card = {
 111         .driver = {
 112                 .name   = "asoc-simple-card",
 113                 .owner = THIS_MODULE,
 114         },
 115         .probe          = asoc_simple_card_probe,
 116         .remove         = asoc_simple_card_remove,
 117 };
 118
 119 module_platform_driver(asoc_simple_card);
 120
 121 MODULE_ALIAS("platform:asoc-simple-card");
 122 MODULE_LICENSE("GPL");
 123 MODULE_DESCRIPTION("ASoC Simple Sound Card");
 124 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");