target/linux/bcm27xx/patches-5.4/950-0074-Add-support-for-Fe-Pi-audio-sound-card.-1867.patch

   1 From b3d295a256e2649444f91dd8a30bfd31873e714c Mon Sep 17 00:00:00 2001
   2 From: Fe-Pi <fe-pi@cox.net>
   3 Date: Wed, 1 Mar 2017 04:42:43 -0700
   4 Subject: [PATCH] Add support for Fe-Pi audio sound card. (#1867)
   5
   6 Fe-Pi Audio Sound Card is based on NXP SGTL5000 codec.
   7 Mechanical specification of the board is the same the Raspberry Pi Zero.
   8 3.5mm jacks for Headphone/Mic, Line In, and Line Out.
   9
  10 Signed-off-by: Henry Kupis <fe-pi@cox.net>
  11
  12 ASoC: fe-pi-audio: use modern dai_link style
  13
  14 Signed-off-by: Hui Wang <hui.wang@canonical.com>
  15 ---
  16  sound/soc/bcm/fe-pi-audio.c | 154 ++++++++++++++++++++++++++++++++++++
  17  1 file changed, 154 insertions(+)
  18  create mode 100644 sound/soc/bcm/fe-pi-audio.c
  19
  20 --- /dev/null
  21 +++ b/sound/soc/bcm/fe-pi-audio.c
  22 @@ -0,0 +1,154 @@
  23 +/*
  24 + * ASoC Driver for Fe-Pi Audio Sound Card
  25 + *
  26 + * Author:     Henry Kupis <kuupaz@gmail.com>
  27 + *             Copyright 2016
  28 + *             based on code by Florian Meier <florian.meier@koalo.de>
  29 + *             based on code by Shawn Guo <shawn.guo@linaro.org>
  30 + *
  31 + * This program is free software; you can redistribute it and/or
  32 + * modify it under the terms of the GNU General Public License
  33 + * version 2 as published by the Free Software Foundation.
  34 + *
  35 + * This program is distributed in the hope that it will be useful, but
  36 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  37 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  38 + * General Public License for more details.
  39 + */
  40 +
  41 +#include <linux/module.h>
  42 +#include <linux/platform_device.h>
  43 +#include <linux/io.h>
  44 +
  45 +#include <sound/core.h>
  46 +#include <sound/pcm.h>
  47 +#include <sound/pcm_params.h>
  48 +#include <sound/soc.h>
  49 +#include <sound/jack.h>
  50 +
  51 +#include "../codecs/sgtl5000.h"
  52 +
  53 +static int snd_fe_pi_audio_init(struct snd_soc_pcm_runtime *rtd)
  54 +{
  55 +       struct snd_soc_card *card = rtd->card;
  56 +       struct snd_soc_component *component = rtd->codec_dai->component;
  57 +
  58 +       snd_soc_dapm_force_enable_pin(&card->dapm, "LO");
  59 +       snd_soc_dapm_force_enable_pin(&card->dapm, "ADC");
  60 +       snd_soc_dapm_force_enable_pin(&card->dapm, "DAC");
  61 +       snd_soc_dapm_force_enable_pin(&card->dapm, "HP");
  62 +       snd_soc_component_update_bits(component, SGTL5000_CHIP_ANA_POWER,
  63 +                       SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP);
  64 +
  65 +       return 0;
  66 +}
  67 +
  68 +static int snd_fe_pi_audio_hw_params(struct snd_pcm_substream *substream,
  69 +       struct snd_pcm_hw_params *params)
  70 +{
  71 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  72 +       struct device *dev = rtd->card->dev;
  73 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
  74 +
  75 +       int ret;
  76 +
  77 +       /* Set SGTL5000's SYSCLK */
  78 +       ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, 12288000, SND_SOC_CLOCK_IN);
  79 +       if (ret) {
  80 +               dev_err(dev, "could not set codec driver clock params\n");
  81 +               return ret;
  82 +       }
  83 +
  84 +       return 0;
  85 +}
  86 +
  87 +
  88 +static struct snd_soc_ops snd_fe_pi_audio_ops = {
  89 +       .hw_params = snd_fe_pi_audio_hw_params,
  90 +};
  91 +
  92 +SND_SOC_DAILINK_DEFS(fe_pi,
  93 +       DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")),
  94 +       DAILINK_COMP_ARRAY(COMP_CODEC("sgtl5000.1-000a", "sgtl5000")),
  95 +       DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0")));
  96 +
  97 +static struct snd_soc_dai_link snd_fe_pi_audio_dai[] = {
  98 +       {
  99 +               .name           = "FE-PI",
 100 +               .stream_name    = "Fe-Pi HiFi",
 101 +               .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 102 +                                       SND_SOC_DAIFMT_CBM_CFM,
 103 +               .ops            = &snd_fe_pi_audio_ops,
 104 +               .init           = snd_fe_pi_audio_init,
 105 +               SND_SOC_DAILINK_REG(fe_pi),
 106 +       },
 107 +};
 108 +
 109 +static const struct snd_soc_dapm_route fe_pi_audio_dapm_routes[] = {
 110 +       {"ADC", NULL, "Mic Bias"},
 111 +};
 112 +
 113 +
 114 +static struct snd_soc_card fe_pi_audio = {
 115 +       .name         = "Fe-Pi Audio",
 116 +       .owner        = THIS_MODULE,
 117 +       .dai_link     = snd_fe_pi_audio_dai,
 118 +       .num_links    = ARRAY_SIZE(snd_fe_pi_audio_dai),
 119 +
 120 +       .dapm_routes = fe_pi_audio_dapm_routes,
 121 +       .num_dapm_routes = ARRAY_SIZE(fe_pi_audio_dapm_routes),
 122 +};
 123 +
 124 +static int snd_fe_pi_audio_probe(struct platform_device *pdev)
 125 +{
 126 +       int ret = 0;
 127 +       struct snd_soc_card *card = &fe_pi_audio;
 128 +       struct device_node *np = pdev->dev.of_node;
 129 +       struct device_node *i2s_node;
 130 +       struct snd_soc_dai_link *dai = &snd_fe_pi_audio_dai[0];
 131 +
 132 +       fe_pi_audio.dev = &pdev->dev;
 133 +
 134 +       i2s_node = of_parse_phandle(np, "i2s-controller", 0);
 135 +       if (!i2s_node) {
 136 +               dev_err(&pdev->dev, "i2s_node phandle missing or invalid\n");
 137 +               return -EINVAL;
 138 +       }
 139 +
 140 +       dai->cpus->dai_name = NULL;
 141 +       dai->cpus->of_node = i2s_node;
 142 +       dai->platforms->name = NULL;
 143 +       dai->platforms->of_node = i2s_node;
 144 +
 145 +       of_node_put(i2s_node);
 146 +
 147 +       card->dev = &pdev->dev;
 148 +       platform_set_drvdata(pdev, card);
 149 +
 150 +       ret = devm_snd_soc_register_card(&pdev->dev, card);
 151 +       if (ret && ret != -EPROBE_DEFER)
 152 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 153 +
 154 +       return ret;
 155 +}
 156 +
 157 +static const struct of_device_id snd_fe_pi_audio_of_match[] = {
 158 +       { .compatible = "fe-pi,fe-pi-audio", },
 159 +       {},
 160 +};
 161 +MODULE_DEVICE_TABLE(of, snd_fe_pi_audio_of_match);
 162 +
 163 +static struct platform_driver snd_fe_pi_audio_driver = {
 164 +        .driver = {
 165 +                .name   = "snd-fe-pi-audio",
 166 +                .owner  = THIS_MODULE,
 167 +                .of_match_table = snd_fe_pi_audio_of_match,
 168 +        },
 169 +        .probe          = snd_fe_pi_audio_probe,
 170 +};
 171 +
 172 +module_platform_driver(snd_fe_pi_audio_driver);
 173 +
 174 +MODULE_AUTHOR("Henry Kupis <fe-pi@cox.net>");
 175 +MODULE_DESCRIPTION("ASoC Driver for Fe-Pi Audio");
 176 +MODULE_LICENSE("GPL v2");