target/linux/brcm2708/patches-4.9/950-0082-Add-support-for-Dion-Audio-LOCO-DAC-AMP-HAT.patch

   1 From 999d3e615247d1921d245f7084194efbc697bb66 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/Kconfig          |   7 +++
  11  sound/soc/bcm/Makefile         |   3 +-
  12  sound/soc/bcm/dionaudio_loco.c | 121 +++++++++++++++++++++++++++++++++++++++++
  13  3 files changed, 130 insertions(+), 1 deletion(-)
  14  create mode 100644 sound/soc/bcm/dionaudio_loco.c
  15
  16 --- a/sound/soc/bcm/Kconfig
  17 +++ b/sound/soc/bcm/Kconfig
  18 @@ -116,3 +116,10 @@ config SND_DIGIDAC1_SOUNDCARD
  19          select SND_SOC_WM8741
  20          help
  21           Say Y or M if you want to add support for Red Rocks Audio DigiDAC1 board.
  22 +
  23 +config SND_BCM2708_SOC_DIONAUDIO_LOCO
  24 +       tristate "Support for Dion Audio LOCO DAC-AMP"
  25 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  26 +       select SND_SOC_PCM5102a
  27 +       help
  28 +         Say Y or M if you want to add support for Dion Audio LOCO.
  29 --- a/sound/soc/bcm/Makefile
  30 +++ b/sound/soc/bcm/Makefile
  31 @@ -23,6 +23,7 @@ snd-soc-iqaudio-digi-objs := iqaudio_dig
  32  snd-soc-raspidac3-objs := raspidac3.o
  33  snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
  34  snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o
  35 +snd-soc-dionaudio-loco-objs := dionaudio_loco.o
  36
  37  obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o
  38  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o
  39 @@ -38,4 +39,4 @@ obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DIG
  40  obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) += snd-soc-raspidac3.o
  41  obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
  42  obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o
  43 -
  44 +obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o
  45 --- /dev/null
  46 +++ b/sound/soc/bcm/dionaudio_loco.c
  47 @@ -0,0 +1,121 @@
  48 +/*
  49 + * ASoC Driver for Dion Audio LOCO DAC-AMP
  50 + *
  51 + * Author:      Miquel Blauw <info@dionaudio.nl>
  52 + *              Copyright 2016
  53 + *
  54 + * Based on the software of the RPi-DAC writen by Florian Meier
  55 + *
  56 + * This program is free software; you can redistribute it and/or
  57 + * modify it under the terms of the GNU General Public License
  58 + * version 2 as published by the Free Software Foundation.
  59 + *
  60 + * This program is distributed in the hope that it will be useful, but
  61 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  62 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  63 + * General Public License for more details.
  64 + */
  65 +
  66 +#include <linux/module.h>
  67 +#include <linux/platform_device.h>
  68 +
  69 +#include <sound/core.h>
  70 +#include <sound/pcm.h>
  71 +#include <sound/pcm_params.h>
  72 +#include <sound/soc.h>
  73 +#include <sound/jack.h>
  74 +
  75 +static int snd_rpi_dionaudio_loco_hw_params(
  76 +       struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
  77 +{
  78 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  79 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  80 +
  81 +       unsigned int sample_bits =
  82 +               snd_pcm_format_physical_width(params_format(params));
  83 +
  84 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
  85 +}
  86 +
  87 +/* machine stream operations */
  88 +static struct snd_soc_ops snd_rpi_dionaudio_loco_ops = {
  89 +       .hw_params = snd_rpi_dionaudio_loco_hw_params,
  90 +};
  91 +
  92 +static struct snd_soc_dai_link snd_rpi_dionaudio_loco_dai[] = {
  93 +{
  94 +       .name           = "DionAudio LOCO",
  95 +       .stream_name    = "DionAudio LOCO DAC-AMP",
  96 +       .cpu_dai_name   = "bcm2708-i2s.0",
  97 +       .codec_dai_name = "pcm5102a-hifi",
  98 +       .platform_name  = "bcm2708-i2s.0",
  99 +       .codec_name     = "pcm5102a-codec",
 100 +       .dai_fmt        = SND_SOC_DAIFMT_I2S |
 101 +                         SND_SOC_DAIFMT_NB_NF |
 102 +                         SND_SOC_DAIFMT_CBS_CFS,
 103 +       .ops            = &snd_rpi_dionaudio_loco_ops,
 104 +},
 105 +};
 106 +
 107 +/* audio machine driver */
 108 +static struct snd_soc_card snd_rpi_dionaudio_loco = {
 109 +       .name           = "snd_rpi_dionaudio_loco",
 110 +       .dai_link       = snd_rpi_dionaudio_loco_dai,
 111 +       .num_links      = ARRAY_SIZE(snd_rpi_dionaudio_loco_dai),
 112 +};
 113 +
 114 +static int snd_rpi_dionaudio_loco_probe(struct platform_device *pdev)
 115 +{
 116 +       struct device_node *np;
 117 +       int ret = 0;
 118 +
 119 +       snd_rpi_dionaudio_loco.dev = &pdev->dev;
 120 +
 121 +       np = pdev->dev.of_node;
 122 +       if (np) {
 123 +               struct snd_soc_dai_link *dai = &snd_rpi_dionaudio_loco_dai[0];
 124 +               struct device_node *i2s_np;
 125 +
 126 +               i2s_np = of_parse_phandle(np, "i2s-controller", 0);
 127 +               if (i2s_np) {
 128 +                       dai->cpu_dai_name = NULL;
 129 +                       dai->cpu_of_node = i2s_np;
 130 +                       dai->platform_name = NULL;
 131 +                       dai->platform_of_node = i2s_np;
 132 +               }
 133 +       }
 134 +
 135 +       ret = snd_soc_register_card(&snd_rpi_dionaudio_loco);
 136 +       if (ret)
 137 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 138 +                       ret);
 139 +
 140 +       return ret;
 141 +}
 142 +
 143 +static int snd_rpi_dionaudio_loco_remove(struct platform_device *pdev)
 144 +{
 145 +       return snd_soc_unregister_card(&snd_rpi_dionaudio_loco);
 146 +}
 147 +
 148 +static const struct of_device_id snd_rpi_dionaudio_loco_of_match[] = {
 149 +       { .compatible = "dionaudio,loco-pcm5242-tpa3118", },
 150 +       { /* sentinel */ },
 151 +};
 152 +MODULE_DEVICE_TABLE(of, snd_rpi_dionaudio_loco_of_match);
 153 +
 154 +static struct platform_driver snd_rpi_dionaudio_loco_driver = {
 155 +       .driver = {
 156 +               .name           = "snd-dionaudio-loco",
 157 +               .owner          = THIS_MODULE,
 158 +               .of_match_table = snd_rpi_dionaudio_loco_of_match,
 159 +       },
 160 +       .probe  = snd_rpi_dionaudio_loco_probe,
 161 +       .remove = snd_rpi_dionaudio_loco_remove,
 162 +};
 163 +
 164 +module_platform_driver(snd_rpi_dionaudio_loco_driver);
 165 +
 166 +MODULE_AUTHOR("Miquel Blauw <info@dionaudio.nl>");
 167 +MODULE_DESCRIPTION("ASoC Driver for DionAudio LOCO");
 168 +MODULE_LICENSE("GPL v2");