sound/soc/codecs/ak4554.c

   1 /*
   2  * ak4554.c
   3  *
   4  * Copyright (C) 2013 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/module.h>
  13 #include <sound/soc.h>
  14
  15 /*
  16  * ak4554 is very simple DA/AD converter which has no setting register.
  17  *
  18  * CAUTION
  19  *
  20  * ak4554 playback format is SND_SOC_DAIFMT_RIGHT_J,
  21  * and,   capture  format is SND_SOC_DAIFMT_LEFT_J
  22  * on same bit clock, LR clock.
  23  * But, this driver doesn't have snd_soc_dai_ops :: set_fmt
  24  *
  25  * CPU/Codec DAI image
  26  *
  27  * CPU-DAI1 (plaback only fmt = RIGHT_J) --+-- ak4554
  28  *                                         |
  29  * CPU-DAI2 (capture only fmt = LEFT_J) ---+
  30  */
  31
  32 static const struct snd_soc_dapm_widget ak4554_dapm_widgets[] = {
  33 SND_SOC_DAPM_INPUT("AINL"),
  34 SND_SOC_DAPM_INPUT("AINR"),
  35
  36 SND_SOC_DAPM_OUTPUT("AOUTL"),
  37 SND_SOC_DAPM_OUTPUT("AOUTR"),
  38 };
  39
  40 static const struct snd_soc_dapm_route ak4554_dapm_routes[] = {
  41         { "Capture", NULL, "AINL" },
  42         { "Capture", NULL, "AINR" },
  43
  44         { "AOUTL", NULL, "Playback" },
  45         { "AOUTR", NULL, "Playback" },
  46 };
  47
  48 static struct snd_soc_dai_driver ak4554_dai = {
  49         .name = "ak4554-hifi",
  50         .playback = {
  51                 .stream_name = "Playback",
  52                 .channels_min = 2,
  53                 .channels_max = 2,
  54                 .rates = SNDRV_PCM_RATE_8000_48000,
  55                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
  56         },
  57         .capture = {
  58                 .stream_name = "Capture",
  59                 .channels_min = 2,
  60                 .channels_max = 2,
  61                 .rates = SNDRV_PCM_RATE_8000_48000,
  62                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
  63         },
  64         .symmetric_rates = 1,
  65 };
  66
  67 static struct snd_soc_codec_driver soc_codec_dev_ak4554 = {
  68         .dapm_widgets = ak4554_dapm_widgets,
  69         .num_dapm_widgets = ARRAY_SIZE(ak4554_dapm_widgets),
  70         .dapm_routes = ak4554_dapm_routes,
  71         .num_dapm_routes = ARRAY_SIZE(ak4554_dapm_routes),
  72 };
  73
  74 static int ak4554_soc_probe(struct platform_device *pdev)
  75 {
  76         return snd_soc_register_codec(&pdev->dev,
  77                                       &soc_codec_dev_ak4554,
  78                                       &ak4554_dai, 1);
  79 }
  80
  81 static int ak4554_soc_remove(struct platform_device *pdev)
  82 {
  83         snd_soc_unregister_codec(&pdev->dev);
  84         return 0;
  85 }
  86
  87 static struct of_device_id ak4554_of_match[] = {
  88         { .compatible = "asahi-kasei,ak4554" },
  89         {},
  90 };
  91 MODULE_DEVICE_TABLE(of, ak4554_of_match);
  92
  93 static struct platform_driver ak4554_driver = {
  94         .driver = {
  95                 .name = "ak4554-adc-dac",
  96                 .owner = THIS_MODULE,
  97                 .of_match_table = ak4554_of_match,
  98         },
  99         .probe  = ak4554_soc_probe,
 100         .remove = ak4554_soc_remove,
 101 };
 102 module_platform_driver(ak4554_driver);
 103
 104 MODULE_LICENSE("GPL");
 105 MODULE_DESCRIPTION("SoC AK4554 driver");
 106 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");