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Linux/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>");
107 

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