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_pcm_runtime *rtd)
  20 {
  21         struct asoc_simple_card_info *cinfo = asoc_simple_get_card_info(rtd);
  22         struct asoc_simple_dai_init_info *iinfo = cinfo->init;
  23         struct snd_soc_dai *codec = rtd->codec_dai;
  24         struct snd_soc_dai *cpu = rtd->cpu_dai;
  25         unsigned int cpu_daifmt = iinfo->fmt | iinfo->cpu_daifmt;
  26         unsigned int codec_daifmt = iinfo->fmt | iinfo->codec_daifmt;
  27         int ret;
  28
  29         if (codec_daifmt) {
  30                 ret = snd_soc_dai_set_fmt(codec, codec_daifmt);
  31                 if (ret < 0)
  32                         return ret;
  33         }
  34
  35         if (iinfo->sysclk) {
  36                 ret = snd_soc_dai_set_sysclk(codec, 0, iinfo->sysclk, 0);
  37                 if (ret < 0)
  38                         return ret;
  39         }
  40
  41         if (cpu_daifmt) {
  42                 ret = snd_soc_dai_set_fmt(cpu, cpu_daifmt);
  43                 if (ret < 0)
  44                         return ret;
  45         }
  46
  47         return 0;
  48 }
  49
  50 static int asoc_simple_card_probe(struct platform_device *pdev)
  51 {
  52         struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
  53
  54         if (!cinfo) {
  55                 dev_err(&pdev->dev, "no info for asoc-simple-card\n");
  56                 return -EINVAL;
  57         }
  58
  59         if (!cinfo->name        ||
  60             !cinfo->card        ||
  61             !cinfo->cpu_dai     ||
  62             !cinfo->codec       ||
  63             !cinfo->platform    ||
  64             !cinfo->codec_dai) {
  65                 dev_err(&pdev->dev, "insufficient asoc_simple_card_info settings\n");
  66                 return -EINVAL;
  67         }
  68
  69         /*
  70          * init snd_soc_dai_link
  71          */
  72         cinfo->snd_link.name            = cinfo->name;
  73         cinfo->snd_link.stream_name     = cinfo->name;
  74         cinfo->snd_link.cpu_dai_name    = cinfo->cpu_dai;
  75         cinfo->snd_link.platform_name   = cinfo->platform;
  76         cinfo->snd_link.codec_name      = cinfo->codec;
  77         cinfo->snd_link.codec_dai_name  = cinfo->codec_dai;
  78
  79         /* enable snd_link.init if cinfo has settings */
  80         if (cinfo->init)
  81                 cinfo->snd_link.init    = asoc_simple_card_dai_init;
  82
  83         /*
  84          * init snd_soc_card
  85          */
  86         cinfo->snd_card.name            = cinfo->card;
  87         cinfo->snd_card.owner           = THIS_MODULE;
  88         cinfo->snd_card.dai_link        = &cinfo->snd_link;
  89         cinfo->snd_card.num_links       = 1;
  90         cinfo->snd_card.dev             = &pdev->dev;
  91
  92         return snd_soc_register_card(&cinfo->snd_card);
  93 }
  94
  95 static int asoc_simple_card_remove(struct platform_device *pdev)
  96 {
  97         struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
  98
  99         return snd_soc_unregister_card(&cinfo->snd_card);
 100 }
 101
 102 static struct platform_driver asoc_simple_card = {
 103         .driver = {
 104                 .name   = "asoc-simple-card",
 105         },
 106         .probe          = asoc_simple_card_probe,
 107         .remove         = asoc_simple_card_remove,
 108 };
 109
 110 module_platform_driver(asoc_simple_card);
 111
 112 MODULE_LICENSE("GPL");
 113 MODULE_DESCRIPTION("ASoC Simple Sound Card");
 114 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");