sound/soc/codecs/es7134.c

   1 /*
   2  * Copyright (c) 2017 BayLibre, SAS.
   3  * Author: Jerome Brunet <jbrunet@baylibre.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  * The full GNU General Public License is included in this distribution
  17  * in the file called COPYING.
  18  */
  19
  20 #include <linux/module.h>
  21 #include <sound/soc.h>
  22
  23 /*
  24  * The everest 7134 is a very simple DA converter with no register
  25  */
  26
  27 static int es7134_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
  28 {
  29         fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
  30                 SND_SOC_DAIFMT_MASTER_MASK);
  31
  32         if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  33                     SND_SOC_DAIFMT_CBS_CFS)) {
  34                 dev_err(codec_dai->dev, "Invalid DAI format\n");
  35                 return -EINVAL;
  36         }
  37
  38         return 0;
  39 }
  40
  41 static const struct snd_soc_dai_ops es7134_dai_ops = {
  42         .set_fmt        = es7134_set_fmt,
  43 };
  44
  45 static struct snd_soc_dai_driver es7134_dai = {
  46         .name = "es7134-hifi",
  47         .playback = {
  48                 .stream_name = "Playback",
  49                 .channels_min = 2,
  50                 .channels_max = 2,
  51                 .rates = SNDRV_PCM_RATE_8000_192000,
  52                 .formats = (SNDRV_PCM_FMTBIT_S16_LE  |
  53                             SNDRV_PCM_FMTBIT_S18_3LE |
  54                             SNDRV_PCM_FMTBIT_S20_3LE |
  55                             SNDRV_PCM_FMTBIT_S24_3LE |
  56                             SNDRV_PCM_FMTBIT_S24_LE),
  57         },
  58         .ops = &es7134_dai_ops,
  59 };
  60
  61 static const struct snd_soc_dapm_widget es7134_dapm_widgets[] = {
  62         SND_SOC_DAPM_OUTPUT("AOUTL"),
  63         SND_SOC_DAPM_OUTPUT("AOUTR"),
  64         SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
  65 };
  66
  67 static const struct snd_soc_dapm_route es7134_dapm_routes[] = {
  68         { "AOUTL", NULL, "DAC" },
  69         { "AOUTR", NULL, "DAC" },
  70 };
  71
  72 static struct snd_soc_codec_driver es7134_codec_driver = {
  73         .component_driver = {
  74                 .dapm_widgets           = es7134_dapm_widgets,
  75                 .num_dapm_widgets       = ARRAY_SIZE(es7134_dapm_widgets),
  76                 .dapm_routes            = es7134_dapm_routes,
  77                 .num_dapm_routes        = ARRAY_SIZE(es7134_dapm_routes),
  78         },
  79 };
  80
  81 static int es7134_probe(struct platform_device *pdev)
  82 {
  83         return snd_soc_register_codec(&pdev->dev,
  84                                       &es7134_codec_driver,
  85                                       &es7134_dai, 1);
  86 }
  87
  88 static int es7134_remove(struct platform_device *pdev)
  89 {
  90         snd_soc_unregister_codec(&pdev->dev);
  91         return 0;
  92 }
  93
  94 #ifdef CONFIG_OF
  95 static const struct of_device_id es7134_ids[] = {
  96         { .compatible = "everest,es7134", },
  97         { .compatible = "everest,es7144", },
  98         { }
  99 };
 100 MODULE_DEVICE_TABLE(of, es7134_ids);
 101 #endif
 102
 103 static struct platform_driver es7134_driver = {
 104         .driver = {
 105                 .name = "es7134",
 106                 .of_match_table = of_match_ptr(es7134_ids),
 107         },
 108         .probe = es7134_probe,
 109         .remove = es7134_remove,
 110 };
 111
 112 module_platform_driver(es7134_driver);
 113
 114 MODULE_DESCRIPTION("ASoC ES7134 audio codec driver");
 115 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 116 MODULE_LICENSE("GPL");