target/linux/bcm27xx/patches-5.4/950-0067-Add-support-for-Dion-Audio-LOCO-DAC-AMP-HAT.patch

   1 From 12b182ee61ee6654c480f6643fcf818c6fe43e33 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 ASoC: dionaudio_loco: use modern dai_link style
  11
  12 Signed-off-by: Hui Wang <hui.wang@canonical.com>
  13 ---
  14  sound/soc/bcm/dionaudio_loco.c | 117 +++++++++++++++++++++++++++++++++
  15  1 file changed, 117 insertions(+)
  16  create mode 100644 sound/soc/bcm/dionaudio_loco.c
  17
  18 --- /dev/null
  19 +++ b/sound/soc/bcm/dionaudio_loco.c
  20 @@ -0,0 +1,117 @@
  21 +/*
  22 + * ASoC Driver for Dion Audio LOCO DAC-AMP
  23 + *
  24 + * Author:      Miquel Blauw <info@dionaudio.nl>
  25 + *              Copyright 2016
  26 + *
  27 + * Based on the software of the RPi-DAC writen by Florian Meier
  28 + *
  29 + * This program is free software; you can redistribute it and/or
  30 + * modify it under the terms of the GNU General Public License
  31 + * version 2 as published by the Free Software Foundation.
  32 + *
  33 + * This program is distributed in the hope that it will be useful, but
  34 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  35 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  36 + * General Public License for more details.
  37 + */
  38 +
  39 +#include <linux/module.h>
  40 +#include <linux/platform_device.h>
  41 +
  42 +#include <sound/core.h>
  43 +#include <sound/pcm.h>
  44 +#include <sound/pcm_params.h>
  45 +#include <sound/soc.h>
  46 +#include <sound/jack.h>
  47 +
  48 +static int snd_rpi_dionaudio_loco_hw_params(
  49 +       struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
  50 +{
  51 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  52 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  53 +
  54 +       unsigned int sample_bits =
  55 +               snd_pcm_format_physical_width(params_format(params));
  56 +
  57 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
  58 +}
  59 +
  60 +/* machine stream operations */
  61 +static struct snd_soc_ops snd_rpi_dionaudio_loco_ops = {
  62 +       .hw_params = snd_rpi_dionaudio_loco_hw_params,
  63 +};
  64 +
  65 +SND_SOC_DAILINK_DEFS(dionaudio_loco,
  66 +       DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")),
  67 +       DAILINK_COMP_ARRAY(COMP_CODEC("pcm5102a-codec", "pcm5102a-hifi")),
  68 +       DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0")));
  69 +
  70 +static struct snd_soc_dai_link snd_rpi_dionaudio_loco_dai[] = {
  71 +{
  72 +       .name           = "DionAudio LOCO",
  73 +       .stream_name    = "DionAudio LOCO DAC-AMP",
  74 +       .dai_fmt        = SND_SOC_DAIFMT_I2S |
  75 +                         SND_SOC_DAIFMT_NB_NF |
  76 +                         SND_SOC_DAIFMT_CBS_CFS,
  77 +       .ops            = &snd_rpi_dionaudio_loco_ops,
  78 +       SND_SOC_DAILINK_REG(dionaudio_loco),
  79 +},
  80 +};
  81 +
  82 +/* audio machine driver */
  83 +static struct snd_soc_card snd_rpi_dionaudio_loco = {
  84 +       .name           = "snd_rpi_dionaudio_loco",
  85 +       .dai_link       = snd_rpi_dionaudio_loco_dai,
  86 +       .num_links      = ARRAY_SIZE(snd_rpi_dionaudio_loco_dai),
  87 +};
  88 +
  89 +static int snd_rpi_dionaudio_loco_probe(struct platform_device *pdev)
  90 +{
  91 +       struct device_node *np;
  92 +       int ret = 0;
  93 +
  94 +       snd_rpi_dionaudio_loco.dev = &pdev->dev;
  95 +
  96 +       np = pdev->dev.of_node;
  97 +       if (np) {
  98 +               struct snd_soc_dai_link *dai = &snd_rpi_dionaudio_loco_dai[0];
  99 +               struct device_node *i2s_np;
 100 +
 101 +               i2s_np = of_parse_phandle(np, "i2s-controller", 0);
 102 +               if (i2s_np) {
 103 +                       dai->cpus->dai_name = NULL;
 104 +                       dai->cpus->of_node = i2s_np;
 105 +                       dai->platforms->name = NULL;
 106 +                       dai->platforms->of_node = i2s_np;
 107 +               }
 108 +       }
 109 +
 110 +       ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_dionaudio_loco);
 111 +       if (ret && ret != -EPROBE_DEFER)
 112 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 113 +                       ret);
 114 +
 115 +       return ret;
 116 +}
 117 +
 118 +static const struct of_device_id snd_rpi_dionaudio_loco_of_match[] = {
 119 +       { .compatible = "dionaudio,loco-pcm5242-tpa3118", },
 120 +       { /* sentinel */ },
 121 +};
 122 +MODULE_DEVICE_TABLE(of, snd_rpi_dionaudio_loco_of_match);
 123 +
 124 +static struct platform_driver snd_rpi_dionaudio_loco_driver = {
 125 +       .driver = {
 126 +               .name           = "snd-dionaudio-loco",
 127 +               .owner          = THIS_MODULE,
 128 +               .of_match_table = snd_rpi_dionaudio_loco_of_match,
 129 +       },
 130 +       .probe  = snd_rpi_dionaudio_loco_probe,
 131 +};
 132 +
 133 +module_platform_driver(snd_rpi_dionaudio_loco_driver);
 134 +
 135 +MODULE_AUTHOR("Miquel Blauw <info@dionaudio.nl>");
 136 +MODULE_DESCRIPTION("ASoC Driver for DionAudio LOCO");
 137 +MODULE_LICENSE("GPL v2");