target/linux/brcm2708/patches-4.19/950-0071-Add-Support-for-JustBoom-Audio-boards.patch

   1 From 71cd216db9c7c05f05c8dd7c7afdfb24f718be74 Mon Sep 17 00:00:00 2001
   2 From: Aaron Shaw <shawaj@gmail.com>
   3 Date: Thu, 7 Apr 2016 21:26:21 +0100
   4 Subject: [PATCH 071/703] Add Support for JustBoom Audio boards
   5
   6 justboom-dac: Adjust for ALSA API change
   7
   8 As of 4.4, snd_soc_limit_volume now takes a struct snd_soc_card *
   9 rather than a struct snd_soc_codec *.
  10
  11 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  12
  13 ASoC: justboom-dac: fix S24_LE format
  14
  15 Remove set_bclk_ratio call so 24-bit data is transmitted in
  16 24 bclk cycles.
  17
  18 Also remove hw_params as it's no longer needed.
  19
  20 Signed-off-by: Matthias Reichl <hias@horus.com>
  21 ---
  22  sound/soc/bcm/justboom-dac.c | 145 +++++++++++++++++++++++++++++++++++
  23  1 file changed, 145 insertions(+)
  24  create mode 100644 sound/soc/bcm/justboom-dac.c
  25
  26 --- /dev/null
  27 +++ b/sound/soc/bcm/justboom-dac.c
  28 @@ -0,0 +1,145 @@
  29 +/*
  30 + * ASoC Driver for JustBoom DAC Raspberry Pi HAT Sound Card
  31 + *
  32 + * Author:     Milan Neskovic
  33 + *             Copyright 2016
  34 + *             based on code by Daniel Matuschek <info@crazy-audio.com>
  35 + *             based on code by Florian Meier <florian.meier@koalo.de>
  36 + *
  37 + * This program is free software; you can redistribute it and/or
  38 + * modify it under the terms of the GNU General Public License
  39 + * version 2 as published by the Free Software Foundation.
  40 + *
  41 + * This program is distributed in the hope that it will be useful, but
  42 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  43 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  44 + * General Public License for more details.
  45 + */
  46 +
  47 +#include <linux/module.h>
  48 +#include <linux/platform_device.h>
  49 +
  50 +#include <sound/core.h>
  51 +#include <sound/pcm.h>
  52 +#include <sound/pcm_params.h>
  53 +#include <sound/soc.h>
  54 +#include <sound/jack.h>
  55 +
  56 +#include "../codecs/pcm512x.h"
  57 +
  58 +static bool digital_gain_0db_limit = true;
  59 +
  60 +static int snd_rpi_justboom_dac_init(struct snd_soc_pcm_runtime *rtd)
  61 +{
  62 +       struct snd_soc_component *component = rtd->codec_dai->component;
  63 +       snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x08, 0x08);
  64 +       snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_4, 0xf, 0x02);
  65 +       snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
  66 +
  67 +       if (digital_gain_0db_limit)
  68 +       {
  69 +               int ret;
  70 +               struct snd_soc_card *card = rtd->card;
  71 +
  72 +               ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207);
  73 +               if (ret < 0)
  74 +                       dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
  75 +       }
  76 +
  77 +       return 0;
  78 +}
  79 +
  80 +static int snd_rpi_justboom_dac_startup(struct snd_pcm_substream *substream) {
  81 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  82 +       struct snd_soc_component *component = rtd->codec_dai->component;
  83 +       snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
  84 +       return 0;
  85 +}
  86 +
  87 +static void snd_rpi_justboom_dac_shutdown(struct snd_pcm_substream *substream) {
  88 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  89 +       struct snd_soc_component *component = rtd->codec_dai->component;
  90 +       snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08,0x00);
  91 +}
  92 +
  93 +/* machine stream operations */
  94 +static struct snd_soc_ops snd_rpi_justboom_dac_ops = {
  95 +       .startup = snd_rpi_justboom_dac_startup,
  96 +       .shutdown = snd_rpi_justboom_dac_shutdown,
  97 +};
  98 +
  99 +static struct snd_soc_dai_link snd_rpi_justboom_dac_dai[] = {
 100 +{
 101 +       .name           = "JustBoom DAC",
 102 +       .stream_name    = "JustBoom DAC HiFi",
 103 +       .cpu_dai_name   = "bcm2708-i2s.0",
 104 +       .codec_dai_name = "pcm512x-hifi",
 105 +       .platform_name  = "bcm2708-i2s.0",
 106 +       .codec_name     = "pcm512x.1-004d",
 107 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 108 +                               SND_SOC_DAIFMT_CBS_CFS,
 109 +       .ops            = &snd_rpi_justboom_dac_ops,
 110 +       .init           = snd_rpi_justboom_dac_init,
 111 +},
 112 +};
 113 +
 114 +/* audio machine driver */
 115 +static struct snd_soc_card snd_rpi_justboom_dac = {
 116 +       .name         = "snd_rpi_justboom_dac",
 117 +       .driver_name  = "JustBoomDac",
 118 +       .owner        = THIS_MODULE,
 119 +       .dai_link     = snd_rpi_justboom_dac_dai,
 120 +       .num_links    = ARRAY_SIZE(snd_rpi_justboom_dac_dai),
 121 +};
 122 +
 123 +static int snd_rpi_justboom_dac_probe(struct platform_device *pdev)
 124 +{
 125 +       int ret = 0;
 126 +
 127 +       snd_rpi_justboom_dac.dev = &pdev->dev;
 128 +
 129 +       if (pdev->dev.of_node) {
 130 +           struct device_node *i2s_node;
 131 +           struct snd_soc_dai_link *dai = &snd_rpi_justboom_dac_dai[0];
 132 +           i2s_node = of_parse_phandle(pdev->dev.of_node,
 133 +                                       "i2s-controller", 0);
 134 +
 135 +           if (i2s_node) {
 136 +                       dai->cpu_dai_name = NULL;
 137 +                       dai->cpu_of_node = i2s_node;
 138 +                       dai->platform_name = NULL;
 139 +                       dai->platform_of_node = i2s_node;
 140 +           }
 141 +
 142 +           digital_gain_0db_limit = !of_property_read_bool(
 143 +                       pdev->dev.of_node, "justboom,24db_digital_gain");
 144 +       }
 145 +
 146 +       ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_justboom_dac);
 147 +       if (ret && ret != -EPROBE_DEFER)
 148 +               dev_err(&pdev->dev,
 149 +                       "snd_soc_register_card() failed: %d\n", ret);
 150 +
 151 +       return ret;
 152 +}
 153 +
 154 +static const struct of_device_id snd_rpi_justboom_dac_of_match[] = {
 155 +       { .compatible = "justboom,justboom-dac", },
 156 +       {},
 157 +};
 158 +MODULE_DEVICE_TABLE(of, snd_rpi_justboom_dac_of_match);
 159 +
 160 +static struct platform_driver snd_rpi_justboom_dac_driver = {
 161 +       .driver = {
 162 +               .name   = "snd-rpi-justboom-dac",
 163 +               .owner  = THIS_MODULE,
 164 +               .of_match_table = snd_rpi_justboom_dac_of_match,
 165 +       },
 166 +       .probe          = snd_rpi_justboom_dac_probe,
 167 +};
 168 +
 169 +module_platform_driver(snd_rpi_justboom_dac_driver);
 170 +
 171 +MODULE_AUTHOR("Milan Neskovic <info@justboom.co>");
 172 +MODULE_DESCRIPTION("ASoC Driver for JustBoom PI DAC HAT Sound Card");
 173 +MODULE_LICENSE("GPL v2");