sound/soc/bcm/hifiberry_dacplusdsp.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * ASoC Driver for HiFiBerry DAC + DSP
   4  *
   5  * Author:      Joerg Schambacher <joscha@schambacher.com>
   6  *              Copyright 2018
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 #include <linux/init.h>
  19 #include <linux/module.h>
  20 #include <linux/of.h>
  21 #include <linux/platform_device.h>
  22 #include <sound/soc.h>
  23
  24 static struct snd_soc_component_driver dacplusdsp_component_driver;
  25
  26 static struct snd_soc_dai_driver dacplusdsp_dai = {
  27         .name = "dacplusdsp-hifi",
  28         .capture = {
  29                 .stream_name = "DAC+DSP Capture",
  30                 .channels_min = 2,
  31                 .channels_max = 2,
  32                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
  33                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
  34                            SNDRV_PCM_FMTBIT_S24_LE |
  35                            SNDRV_PCM_FMTBIT_S32_LE,
  36         },
  37         .playback = {
  38                 .stream_name = "DACP+DSP Playback",
  39                 .channels_min = 2,
  40                 .channels_max = 2,
  41                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
  42                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
  43                            SNDRV_PCM_FMTBIT_S24_LE |
  44                            SNDRV_PCM_FMTBIT_S32_LE,
  45         },
  46         .symmetric_rate = 1};
  47
  48 #ifdef CONFIG_OF
  49 static const struct of_device_id dacplusdsp_ids[] = {
  50         {
  51                 .compatible = "hifiberry,dacplusdsp",
  52         },
  53         {} };
  54 MODULE_DEVICE_TABLE(of, dacplusdsp_ids);
  55 #endif
  56
  57 static int dacplusdsp_platform_probe(struct platform_device *pdev)
  58 {
  59         int ret;
  60
  61         ret = snd_soc_register_component(&pdev->dev,
  62                         &dacplusdsp_component_driver, &dacplusdsp_dai, 1);
  63         if (ret) {
  64                 pr_alert("snd_soc_register_component failed\n");
  65                 return ret;
  66         }
  67
  68         return 0;
  69 }
  70
  71 static int dacplusdsp_platform_remove(struct platform_device *pdev)
  72 {
  73         snd_soc_unregister_component(&pdev->dev);
  74         return 0;
  75 }
  76
  77 static struct platform_driver dacplusdsp_driver = {
  78         .driver = {
  79                 .name = "hifiberry-dacplusdsp-codec",
  80                 .of_match_table = of_match_ptr(dacplusdsp_ids),
  81                 },
  82                 .probe = dacplusdsp_platform_probe,
  83                 .remove = dacplusdsp_platform_remove,
  84 };
  85
  86 module_platform_driver(dacplusdsp_driver);
  87
  88 MODULE_AUTHOR("Joerg Schambacher <joerg@i2audio.com>");
  89 MODULE_DESCRIPTION("ASoC Driver for HiFiBerry DAC+DSP");
  90 MODULE_LICENSE("GPL v2");