LXR linux/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
  19static 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 && set->sysclk)
  31                ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
  32
  33        return ret;
  34}
  35
  36static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
  37{
  38        struct asoc_simple_card_info *info = asoc_simple_get_card_info(rtd);
  39        struct snd_soc_dai *codec = rtd->codec_dai;
  40        struct snd_soc_dai *cpu = rtd->cpu_dai;
  41        unsigned int daifmt = info->daifmt;
  42        int ret;
  43
  44        ret = __asoc_simple_card_dai_init(codec, &info->codec_dai, daifmt);
  45        if (ret < 0)
  46                return ret;
  47
  48        ret = __asoc_simple_card_dai_init(cpu, &info->cpu_dai, daifmt);
  49        if (ret < 0)
  50                return ret;
  51
  52        return 0;
  53}
  54
  55static int asoc_simple_card_probe(struct platform_device *pdev)
  56{
  57        struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
  58        struct device *dev = &pdev->dev;
  59
  60        if (!cinfo) {
  61                dev_err(dev, "no info for asoc-simple-card\n");
  62                return -EINVAL;
  63        }
  64
  65        if (!cinfo->name        ||
  66            !cinfo->card        ||
  67            !cinfo->codec       ||
  68            !cinfo->platform    ||
  69            !cinfo->cpu_dai.name ||
  70            !cinfo->codec_dai.name) {
  71                dev_err(dev, "insufficient asoc_simple_card_info settings\n");
  72                return -EINVAL;
  73        }
  74
  75        /*
  76         * init snd_soc_dai_link
  77         */
  78        cinfo->snd_link.name            = cinfo->name;
  79        cinfo->snd_link.stream_name     = cinfo->name;
  80        cinfo->snd_link.cpu_dai_name    = cinfo->cpu_dai.name;
  81        cinfo->snd_link.platform_name   = cinfo->platform;
  82        cinfo->snd_link.codec_name      = cinfo->codec;
  83        cinfo->snd_link.codec_dai_name  = cinfo->codec_dai.name;
  84        cinfo->snd_link.init            = asoc_simple_card_dai_init;
  85
  86        /*
  87         * init snd_soc_card
  88         */
  89        cinfo->snd_card.name            = cinfo->card;
  90        cinfo->snd_card.owner           = THIS_MODULE;
  91        cinfo->snd_card.dai_link        = &cinfo->snd_link;
  92        cinfo->snd_card.num_links       = 1;
  93        cinfo->snd_card.dev             = &pdev->dev;
  94
  95        return snd_soc_register_card(&cinfo->snd_card);
  96}
  97
  98static int asoc_simple_card_remove(struct platform_device *pdev)
  99{
 100        struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
 101
 102        return snd_soc_unregister_card(&cinfo->snd_card);
 103}
 104
 105static struct platform_driver asoc_simple_card = {
 106        .driver = {
 107                .name   = "asoc-simple-card",
 108        },
 109        .probe          = asoc_simple_card_probe,
 110        .remove         = asoc_simple_card_remove,
 111};
 112
 113module_platform_driver(asoc_simple_card);
 114
 115MODULE_LICENSE("GPL");
 116MODULE_DESCRIPTION("ASoC Simple Sound Card");
 117MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 118