target/linux/bcm27xx/patches-4.19/950-0073-Add-support-for-Dion-Audio-LOCO-DAC-AMP-HAT.patch

   1 From 234b6a3cfd5bc1fb341c01f8ac773956f5af42cd Mon Sep 17 00:00:00 2001
   2 From: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
   3 Date: Sat, 2 Jul 2016 16:26:19 +0100
   4 Subject: [PATCH] Add support for Dion Audio LOCO DAC-AMP HAT
   5
   6 Using dedicated machine driver and pcm5102a codec driver.
   7
   8 Signed-off-by: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
   9 ---
  10  sound/soc/bcm/dionaudio_loco.c | 115 +++++++++++++++++++++++++++++++++
  11  1 file changed, 115 insertions(+)
  12  create mode 100644 sound/soc/bcm/dionaudio_loco.c
  13
  14 --- /dev/null
  15 +++ b/sound/soc/bcm/dionaudio_loco.c
  16 @@ -0,0 +1,115 @@
  17 +/*
  18 + * ASoC Driver for Dion Audio LOCO DAC-AMP
  19 + *
  20 + * Author:      Miquel Blauw <info@dionaudio.nl>
  21 + *              Copyright 2016
  22 + *
  23 + * Based on the software of the RPi-DAC writen by Florian Meier
  24 + *
  25 + * This program is free software; you can redistribute it and/or
  26 + * modify it under the terms of the GNU General Public License
  27 + * version 2 as published by the Free Software Foundation.
  28 + *
  29 + * This program is distributed in the hope that it will be useful, but
  30 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  31 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  32 + * General Public License for more details.
  33 + */
  34 +
  35 +#include <linux/module.h>
  36 +#include <linux/platform_device.h>
  37 +
  38 +#include <sound/core.h>
  39 +#include <sound/pcm.h>
  40 +#include <sound/pcm_params.h>
  41 +#include <sound/soc.h>
  42 +#include <sound/jack.h>
  43 +
  44 +static int snd_rpi_dionaudio_loco_hw_params(
  45 +       struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
  46 +{
  47 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  48 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  49 +
  50 +       unsigned int sample_bits =
  51 +               snd_pcm_format_physical_width(params_format(params));
  52 +
  53 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
  54 +}
  55 +
  56 +/* machine stream operations */
  57 +static struct snd_soc_ops snd_rpi_dionaudio_loco_ops = {
  58 +       .hw_params = snd_rpi_dionaudio_loco_hw_params,
  59 +};
  60 +
  61 +static struct snd_soc_dai_link snd_rpi_dionaudio_loco_dai[] = {
  62 +{
  63 +       .name           = "DionAudio LOCO",
  64 +       .stream_name    = "DionAudio LOCO DAC-AMP",
  65 +       .cpu_dai_name   = "bcm2708-i2s.0",
  66 +       .codec_dai_name = "pcm5102a-hifi",
  67 +       .platform_name  = "bcm2708-i2s.0",
  68 +       .codec_name     = "pcm5102a-codec",
  69 +       .dai_fmt        = SND_SOC_DAIFMT_I2S |
  70 +                         SND_SOC_DAIFMT_NB_NF |
  71 +                         SND_SOC_DAIFMT_CBS_CFS,
  72 +       .ops            = &snd_rpi_dionaudio_loco_ops,
  73 +},
  74 +};
  75 +
  76 +/* audio machine driver */
  77 +static struct snd_soc_card snd_rpi_dionaudio_loco = {
  78 +       .name           = "snd_rpi_dionaudio_loco",
  79 +       .dai_link       = snd_rpi_dionaudio_loco_dai,
  80 +       .num_links      = ARRAY_SIZE(snd_rpi_dionaudio_loco_dai),
  81 +};
  82 +
  83 +static int snd_rpi_dionaudio_loco_probe(struct platform_device *pdev)
  84 +{
  85 +       struct device_node *np;
  86 +       int ret = 0;
  87 +
  88 +       snd_rpi_dionaudio_loco.dev = &pdev->dev;
  89 +
  90 +       np = pdev->dev.of_node;
  91 +       if (np) {
  92 +               struct snd_soc_dai_link *dai = &snd_rpi_dionaudio_loco_dai[0];
  93 +               struct device_node *i2s_np;
  94 +
  95 +               i2s_np = of_parse_phandle(np, "i2s-controller", 0);
  96 +               if (i2s_np) {
  97 +                       dai->cpu_dai_name = NULL;
  98 +                       dai->cpu_of_node = i2s_np;
  99 +                       dai->platform_name = NULL;
 100 +                       dai->platform_of_node = i2s_np;
 101 +               }
 102 +       }
 103 +
 104 +       ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_dionaudio_loco);
 105 +       if (ret && ret != -EPROBE_DEFER)
 106 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 107 +                       ret);
 108 +
 109 +       return ret;
 110 +}
 111 +
 112 +static const struct of_device_id snd_rpi_dionaudio_loco_of_match[] = {
 113 +       { .compatible = "dionaudio,loco-pcm5242-tpa3118", },
 114 +       { /* sentinel */ },
 115 +};
 116 +MODULE_DEVICE_TABLE(of, snd_rpi_dionaudio_loco_of_match);
 117 +
 118 +static struct platform_driver snd_rpi_dionaudio_loco_driver = {
 119 +       .driver = {
 120 +               .name           = "snd-dionaudio-loco",
 121 +               .owner          = THIS_MODULE,
 122 +               .of_match_table = snd_rpi_dionaudio_loco_of_match,
 123 +       },
 124 +       .probe  = snd_rpi_dionaudio_loco_probe,
 125 +};
 126 +
 127 +module_platform_driver(snd_rpi_dionaudio_loco_driver);
 128 +
 129 +MODULE_AUTHOR("Miquel Blauw <info@dionaudio.nl>");
 130 +MODULE_DESCRIPTION("ASoC Driver for DionAudio LOCO");
 131 +MODULE_LICENSE("GPL v2");