target/linux/brcm2708/patches-4.14/950-0084-sound-Support-for-Dion-Audio-LOCO-V2-DAC-AMP-HAT.patch

   1 From 9698288ce060841ca673ed296cc931130a566a12 Mon Sep 17 00:00:00 2001
   2 From: Miquel <miquelblauw@hotmail.com>
   3 Date: Fri, 24 Feb 2017 20:51:06 +0100
   4 Subject: [PATCH 084/454] sound: Support for Dion Audio LOCO-V2 DAC-AMP HAT
   5
   6 Signed-off-by: Miquel Blauw <info@dionaudio.nl>
   7 ---
   8  sound/soc/bcm/Kconfig             |   7 ++
   9  sound/soc/bcm/Makefile            |   2 +
  10  sound/soc/bcm/dionaudio_loco-v2.c | 140 ++++++++++++++++++++++++++++++
  11  3 files changed, 149 insertions(+)
  12  create mode 100644 sound/soc/bcm/dionaudio_loco-v2.c
  13
  14 --- a/sound/soc/bcm/Kconfig
  15 +++ b/sound/soc/bcm/Kconfig
  16 @@ -134,6 +134,13 @@ config SND_BCM2708_SOC_DIONAUDIO_LOCO
  17         help
  18           Say Y or M if you want to add support for Dion Audio LOCO.
  19
  20 +config SND_BCM2708_SOC_DIONAUDIO_LOCO_V2
  21 +       tristate "Support for Dion Audio LOCO-V2 DAC-AMP"
  22 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  23 +       select SND_SOC_PCM5122
  24 +       help
  25 +         Say Y or M if you want to add support for Dion Audio LOCO-V2.
  26 +
  27  config SND_BCM2708_SOC_ALLO_PIANO_DAC
  28         tristate "Support for Allo Piano DAC"
  29         depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  30 --- a/sound/soc/bcm/Makefile
  31 +++ b/sound/soc/bcm/Makefile
  32 @@ -25,6 +25,7 @@ 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 +snd-soc-dionaudio-loco-v2-objs := dionaudio_loco-v2.o
  37  snd-soc-allo-boss-dac-objs := allo-boss-dac.o
  38  snd-soc-allo-piano-dac-objs := allo-piano-dac.o
  39  snd-soc-allo-piano-dac-plus-objs := allo-piano-dac-plus.o
  40 @@ -46,6 +47,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3)
  41  obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
  42  obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o
  43  obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o
  44 +obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2) += snd-soc-dionaudio-loco-v2.o
  45  obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC) += snd-soc-allo-boss-dac.o
  46  obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o
  47  obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS) += snd-soc-allo-piano-dac-plus.o
  48 --- /dev/null
  49 +++ b/sound/soc/bcm/dionaudio_loco-v2.c
  50 @@ -0,0 +1,140 @@
  51 +/*
  52 + * ASoC Driver for Dion Audio LOCO-V2 DAC-AMP
  53 + *
  54 + * Author:      Miquel Blauw <info@dionaudio.nl>
  55 + *              Copyright 2017
  56 + *
  57 + * Based on the software of the RPi-DAC writen by Florian Meier
  58 + *
  59 + * This program is free software; you can redistribute it and/or
  60 + * modify it under the terms of the GNU General Public License
  61 + * version 2 as published by the Free Software Foundation.
  62 + *
  63 + * This program is distributed in the hope that it will be useful, but
  64 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  65 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  66 + * General Public License for more details.
  67 + */
  68 +
  69 +#include <linux/module.h>
  70 +#include <linux/platform_device.h>
  71 +
  72 +#include <sound/core.h>
  73 +#include <sound/pcm.h>
  74 +#include <sound/pcm_params.h>
  75 +#include <sound/soc.h>
  76 +#include <sound/jack.h>
  77 +
  78 +static bool digital_gain_0db_limit = true;
  79 +
  80 +static int snd_rpi_dionaudio_loco_v2_init(struct snd_soc_pcm_runtime *rtd)
  81 +{
  82 +       if (digital_gain_0db_limit) {
  83 +               int ret;
  84 +               struct snd_soc_card *card = rtd->card;
  85 +
  86 +               ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207);
  87 +               if (ret < 0)
  88 +                       dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
  89 +       }
  90 +
  91 +       return 0;
  92 +}
  93 +
  94 +static int snd_rpi_dionaudio_loco_v2_hw_params(
  95 +       struct snd_pcm_substream *substream,
  96 +       struct snd_pcm_hw_params *params)
  97 +{
  98 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  99 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 100 +
 101 +       unsigned int sample_bits =
 102 +               snd_pcm_format_physical_width(params_format(params));
 103 +
 104 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
 105 +}
 106 +
 107 +/* machine stream operations */
 108 +static struct snd_soc_ops snd_rpi_dionaudio_loco_v2_ops = {
 109 +       .hw_params = snd_rpi_dionaudio_loco_v2_hw_params,
 110 +};
 111 +
 112 +static struct snd_soc_dai_link snd_rpi_dionaudio_loco_v2_dai[] = {
 113 +{
 114 +       .name           = "DionAudio LOCO-V2",
 115 +       .stream_name    = "DionAudio LOCO-V2 DAC-AMP",
 116 +       .cpu_dai_name   = "bcm2708-i2s.0",
 117 +       .codec_dai_name = "pcm512x-hifi",
 118 +       .platform_name  = "bcm2708-i2s.0",
 119 +       .codec_name     = "pcm512x.1-004d",
 120 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 121 +                         SND_SOC_DAIFMT_CBS_CFS,
 122 +       .ops            = &snd_rpi_dionaudio_loco_v2_ops,
 123 +       .init           = snd_rpi_dionaudio_loco_v2_init,
 124 +},};
 125 +
 126 +/* audio machine driver */
 127 +static struct snd_soc_card snd_rpi_dionaudio_loco_v2 = {
 128 +       .name         = "Dion Audio LOCO-V2",
 129 +       .dai_link     = snd_rpi_dionaudio_loco_v2_dai,
 130 +       .num_links    = ARRAY_SIZE(snd_rpi_dionaudio_loco_v2_dai),
 131 +};
 132 +
 133 +static int snd_rpi_dionaudio_loco_v2_probe(struct platform_device *pdev)
 134 +{
 135 +       int ret = 0;
 136 +
 137 +       snd_rpi_dionaudio_loco_v2.dev = &pdev->dev;
 138 +
 139 +       if (pdev->dev.of_node) {
 140 +               struct device_node *i2s_node;
 141 +               struct snd_soc_dai_link *dai =
 142 +                                       &snd_rpi_dionaudio_loco_v2_dai[0];
 143 +
 144 +               i2s_node = of_parse_phandle(pdev->dev.of_node,
 145 +                                           "i2s-controller", 0);
 146 +               if (i2s_node) {
 147 +                       dai->cpu_dai_name = NULL;
 148 +                       dai->cpu_of_node = i2s_node;
 149 +                       dai->platform_name = NULL;
 150 +                       dai->platform_of_node = i2s_node;
 151 +               }
 152 +
 153 +               digital_gain_0db_limit = !of_property_read_bool(
 154 +                       pdev->dev.of_node, "dionaudio,24db_digital_gain");
 155 +       }
 156 +
 157 +       ret = snd_soc_register_card(&snd_rpi_dionaudio_loco_v2);
 158 +       if (ret)
 159 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 160 +                       ret);
 161 +
 162 +       return ret;
 163 +}
 164 +
 165 +static int snd_rpi_dionaudio_loco_v2_remove(struct platform_device *pdev)
 166 +{
 167 +       return snd_soc_unregister_card(&snd_rpi_dionaudio_loco_v2);
 168 +}
 169 +
 170 +static const struct of_device_id dionaudio_of_match[] = {
 171 +       { .compatible = "dionaudio,dionaudio-loco-v2", },
 172 +       {},
 173 +};
 174 +MODULE_DEVICE_TABLE(of, dionaudio_of_match);
 175 +
 176 +static struct platform_driver snd_rpi_dionaudio_loco_v2_driver = {
 177 +       .driver = {
 178 +               .name   = "snd-rpi-dionaudio-loco-v2",
 179 +               .owner  = THIS_MODULE,
 180 +               .of_match_table = dionaudio_of_match,
 181 +       },
 182 +       .probe          = snd_rpi_dionaudio_loco_v2_probe,
 183 +       .remove         = snd_rpi_dionaudio_loco_v2_remove,
 184 +};
 185 +
 186 +module_platform_driver(snd_rpi_dionaudio_loco_v2_driver);
 187 +
 188 +MODULE_AUTHOR("Miquel Blauw <info@dionaudio.nl>");
 189 +MODULE_DESCRIPTION("ASoC Driver for DionAudio LOCO-V2");
 190 +MODULE_LICENSE("GPL v2");