target/linux/bcm27xx/patches-4.19/950-0080-Add-support-for-Fe-Pi-audio-sound-card.-1867.patch

   1 From 8ed265197d7a8f9c1a328d262bfe91050716ad76 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  sound/soc/bcm/fe-pi-audio.c | 152 ++++++++++++++++++++++++++++++++++++
  13  1 file changed, 152 insertions(+)
  14  create mode 100644 sound/soc/bcm/fe-pi-audio.c
  15
  16 --- /dev/null
  17 +++ b/sound/soc/bcm/fe-pi-audio.c
  18 @@ -0,0 +1,152 @@
  19 +/*
  20 + * ASoC Driver for Fe-Pi Audio Sound Card
  21 + *
  22 + * Author:     Henry Kupis <kuupaz@gmail.com>
  23 + *             Copyright 2016
  24 + *             based on code by Florian Meier <florian.meier@koalo.de>
  25 + *             based on code by Shawn Guo <shawn.guo@linaro.org>
  26 + *
  27 + * This program is free software; you can redistribute it and/or
  28 + * modify it under the terms of the GNU General Public License
  29 + * version 2 as published by the Free Software Foundation.
  30 + *
  31 + * This program is distributed in the hope that it will be useful, but
  32 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  33 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  34 + * General Public License for more details.
  35 + */
  36 +
  37 +#include <linux/module.h>
  38 +#include <linux/platform_device.h>
  39 +#include <linux/io.h>
  40 +
  41 +#include <sound/core.h>
  42 +#include <sound/pcm.h>
  43 +#include <sound/pcm_params.h>
  44 +#include <sound/soc.h>
  45 +#include <sound/jack.h>
  46 +
  47 +#include "../codecs/sgtl5000.h"
  48 +
  49 +static int snd_fe_pi_audio_init(struct snd_soc_pcm_runtime *rtd)
  50 +{
  51 +       struct snd_soc_card *card = rtd->card;
  52 +       struct snd_soc_component *component = rtd->codec_dai->component;
  53 +
  54 +       snd_soc_dapm_force_enable_pin(&card->dapm, "LO");
  55 +       snd_soc_dapm_force_enable_pin(&card->dapm, "ADC");
  56 +       snd_soc_dapm_force_enable_pin(&card->dapm, "DAC");
  57 +       snd_soc_dapm_force_enable_pin(&card->dapm, "HP");
  58 +       snd_soc_component_update_bits(component, SGTL5000_CHIP_ANA_POWER,
  59 +                       SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP);
  60 +
  61 +       return 0;
  62 +}
  63 +
  64 +static int snd_fe_pi_audio_hw_params(struct snd_pcm_substream *substream,
  65 +       struct snd_pcm_hw_params *params)
  66 +{
  67 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  68 +       struct device *dev = rtd->card->dev;
  69 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
  70 +
  71 +       int ret;
  72 +
  73 +       /* Set SGTL5000's SYSCLK */
  74 +       ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, 12288000, SND_SOC_CLOCK_IN);
  75 +       if (ret) {
  76 +               dev_err(dev, "could not set codec driver clock params\n");
  77 +               return ret;
  78 +       }
  79 +
  80 +       return 0;
  81 +}
  82 +
  83 +
  84 +static struct snd_soc_ops snd_fe_pi_audio_ops = {
  85 +       .hw_params = snd_fe_pi_audio_hw_params,
  86 +};
  87 +
  88 +static struct snd_soc_dai_link snd_fe_pi_audio_dai[] = {
  89 +       {
  90 +               .name           = "FE-PI",
  91 +               .stream_name    = "Fe-Pi HiFi",
  92 +               .cpu_dai_name   = "bcm2708-i2s.0",
  93 +               .codec_dai_name = "sgtl5000",
  94 +               .platform_name  = "bcm2708-i2s.0",
  95 +               .codec_name     = "sgtl5000.1-000a",
  96 +               .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  97 +                                       SND_SOC_DAIFMT_CBM_CFM,
  98 +               .ops            = &snd_fe_pi_audio_ops,
  99 +               .init           = snd_fe_pi_audio_init,
 100 +       },
 101 +};
 102 +
 103 +static const struct snd_soc_dapm_route fe_pi_audio_dapm_routes[] = {
 104 +       {"ADC", NULL, "Mic Bias"},
 105 +};
 106 +
 107 +
 108 +static struct snd_soc_card fe_pi_audio = {
 109 +       .name         = "Fe-Pi Audio",
 110 +       .owner        = THIS_MODULE,
 111 +       .dai_link     = snd_fe_pi_audio_dai,
 112 +       .num_links    = ARRAY_SIZE(snd_fe_pi_audio_dai),
 113 +
 114 +       .dapm_routes = fe_pi_audio_dapm_routes,
 115 +       .num_dapm_routes = ARRAY_SIZE(fe_pi_audio_dapm_routes),
 116 +};
 117 +
 118 +static int snd_fe_pi_audio_probe(struct platform_device *pdev)
 119 +{
 120 +       int ret = 0;
 121 +       struct snd_soc_card *card = &fe_pi_audio;
 122 +       struct device_node *np = pdev->dev.of_node;
 123 +       struct device_node *i2s_node;
 124 +       struct snd_soc_dai_link *dai = &snd_fe_pi_audio_dai[0];
 125 +
 126 +       fe_pi_audio.dev = &pdev->dev;
 127 +
 128 +       i2s_node = of_parse_phandle(np, "i2s-controller", 0);
 129 +       if (!i2s_node) {
 130 +               dev_err(&pdev->dev, "i2s_node phandle missing or invalid\n");
 131 +               return -EINVAL;
 132 +       }
 133 +
 134 +       dai->cpu_dai_name = NULL;
 135 +       dai->cpu_of_node = i2s_node;
 136 +       dai->platform_name = NULL;
 137 +       dai->platform_of_node = i2s_node;
 138 +
 139 +       of_node_put(i2s_node);
 140 +
 141 +       card->dev = &pdev->dev;
 142 +       platform_set_drvdata(pdev, card);
 143 +
 144 +       ret = devm_snd_soc_register_card(&pdev->dev, card);
 145 +       if (ret && ret != -EPROBE_DEFER)
 146 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 147 +
 148 +       return ret;
 149 +}
 150 +
 151 +static const struct of_device_id snd_fe_pi_audio_of_match[] = {
 152 +       { .compatible = "fe-pi,fe-pi-audio", },
 153 +       {},
 154 +};
 155 +MODULE_DEVICE_TABLE(of, snd_fe_pi_audio_of_match);
 156 +
 157 +static struct platform_driver snd_fe_pi_audio_driver = {
 158 +        .driver = {
 159 +                .name   = "snd-fe-pi-audio",
 160 +                .owner  = THIS_MODULE,
 161 +                .of_match_table = snd_fe_pi_audio_of_match,
 162 +        },
 163 +        .probe          = snd_fe_pi_audio_probe,
 164 +};
 165 +
 166 +module_platform_driver(snd_fe_pi_audio_driver);
 167 +
 168 +MODULE_AUTHOR("Henry Kupis <fe-pi@cox.net>");
 169 +MODULE_DESCRIPTION("ASoC Driver for Fe-Pi Audio");
 170 +MODULE_LICENSE("GPL v2");