target/linux/brcm2708/patches-4.14/950-0085-Add-support-for-Fe-Pi-audio-sound-card.-1867.patch

   1 From 5ab1ef51caf57e4419bdc6fe1e59ea99dd54ce09 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 085/454] 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/Kconfig       |   7 ++
  13  sound/soc/bcm/Makefile      |   2 +
  14  sound/soc/bcm/fe-pi-audio.c | 158 ++++++++++++++++++++++++++++++++++++
  15  3 files changed, 167 insertions(+)
  16  create mode 100644 sound/soc/bcm/fe-pi-audio.c
  17
  18 --- a/sound/soc/bcm/Kconfig
  19 +++ b/sound/soc/bcm/Kconfig
  20 @@ -162,6 +162,13 @@ config SND_BCM2708_SOC_ALLO_BOSS_DAC
  21         help
  22           Say Y or M if you want to add support for Allo Boss DAC.
  23
  24 +config SND_BCM2708_SOC_FE_PI_AUDIO
  25 +       tristate "Support for Fe-Pi-Audio"
  26 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  27 +       select SND_SOC_SGTL5000
  28 +       help
  29 +         Say Y or M if you want to add support for Fe-Pi-Audio.
  30 +
  31  config SND_PISOUND
  32         tristate "Support for Blokas Labs pisound"
  33         depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  34 --- a/sound/soc/bcm/Makefile
  35 +++ b/sound/soc/bcm/Makefile
  36 @@ -30,6 +30,7 @@ snd-soc-allo-boss-dac-objs := allo-boss-
  37  snd-soc-allo-piano-dac-objs := allo-piano-dac.o
  38  snd-soc-allo-piano-dac-plus-objs := allo-piano-dac-plus.o
  39  snd-soc-pisound-objs := pisound.o
  40 +snd-soc-fe-pi-audio-objs := fe-pi-audio.o
  41
  42  obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o
  43  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o
  44 @@ -52,3 +53,4 @@ obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_D
  45  obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o
  46  obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS) += snd-soc-allo-piano-dac-plus.o
  47  obj-$(CONFIG_SND_PISOUND) += snd-soc-pisound.o
  48 +obj-$(CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO) += snd-soc-fe-pi-audio.o
  49 --- /dev/null
  50 +++ b/sound/soc/bcm/fe-pi-audio.c
  51 @@ -0,0 +1,158 @@
  52 +/*
  53 + * ASoC Driver for Fe-Pi Audio Sound Card
  54 + *
  55 + * Author:     Henry Kupis <kuupaz@gmail.com>
  56 + *             Copyright 2016
  57 + *             based on code by Florian Meier <florian.meier@koalo.de>
  58 + *             based on code by Shawn Guo <shawn.guo@linaro.org>
  59 + *
  60 + * This program is free software; you can redistribute it and/or
  61 + * modify it under the terms of the GNU General Public License
  62 + * version 2 as published by the Free Software Foundation.
  63 + *
  64 + * This program is distributed in the hope that it will be useful, but
  65 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  66 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  67 + * General Public License for more details.
  68 + */
  69 +
  70 +#include <linux/module.h>
  71 +#include <linux/platform_device.h>
  72 +#include <linux/io.h>
  73 +
  74 +#include <sound/core.h>
  75 +#include <sound/pcm.h>
  76 +#include <sound/pcm_params.h>
  77 +#include <sound/soc.h>
  78 +#include <sound/jack.h>
  79 +
  80 +#include "../codecs/sgtl5000.h"
  81 +
  82 +static int snd_fe_pi_audio_init(struct snd_soc_pcm_runtime *rtd)
  83 +{
  84 +       struct snd_soc_card *card = rtd->card;
  85 +       struct snd_soc_codec *codec = rtd->codec;
  86 +
  87 +       snd_soc_dapm_force_enable_pin(&card->dapm, "LO");
  88 +       snd_soc_dapm_force_enable_pin(&card->dapm, "ADC");
  89 +       snd_soc_dapm_force_enable_pin(&card->dapm, "DAC");
  90 +       snd_soc_dapm_force_enable_pin(&card->dapm, "HP");
  91 +       snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER,
  92 +                       SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP);
  93 +
  94 +       return 0;
  95 +}
  96 +
  97 +static int snd_fe_pi_audio_hw_params(struct snd_pcm_substream *substream,
  98 +       struct snd_pcm_hw_params *params)
  99 +{
 100 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 101 +       struct device *dev = rtd->card->dev;
 102 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 103 +
 104 +       int ret;
 105 +
 106 +       /* Set SGTL5000's SYSCLK */
 107 +       ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, 12288000, SND_SOC_CLOCK_IN);
 108 +       if (ret) {
 109 +               dev_err(dev, "could not set codec driver clock params\n");
 110 +               return ret;
 111 +       }
 112 +
 113 +       return 0;
 114 +}
 115 +
 116 +
 117 +static struct snd_soc_ops snd_fe_pi_audio_ops = {
 118 +       .hw_params = snd_fe_pi_audio_hw_params,
 119 +};
 120 +
 121 +static struct snd_soc_dai_link snd_fe_pi_audio_dai[] = {
 122 +       {
 123 +               .name           = "FE-PI",
 124 +               .stream_name    = "Fe-Pi HiFi",
 125 +               .cpu_dai_name   = "bcm2708-i2s.0",
 126 +               .codec_dai_name = "sgtl5000",
 127 +               .platform_name  = "bcm2708-i2s.0",
 128 +               .codec_name     = "sgtl5000.1-000a",
 129 +               .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 130 +                                       SND_SOC_DAIFMT_CBM_CFM,
 131 +               .ops            = &snd_fe_pi_audio_ops,
 132 +               .init           = snd_fe_pi_audio_init,
 133 +       },
 134 +};
 135 +
 136 +static const struct snd_soc_dapm_route fe_pi_audio_dapm_routes[] = {
 137 +       {"ADC", NULL, "Mic Bias"},
 138 +};
 139 +
 140 +
 141 +static struct snd_soc_card fe_pi_audio = {
 142 +       .name         = "Fe-Pi Audio",
 143 +       .owner        = THIS_MODULE,
 144 +       .dai_link     = snd_fe_pi_audio_dai,
 145 +       .num_links    = ARRAY_SIZE(snd_fe_pi_audio_dai),
 146 +
 147 +       .dapm_routes = fe_pi_audio_dapm_routes,
 148 +       .num_dapm_routes = ARRAY_SIZE(fe_pi_audio_dapm_routes),
 149 +};
 150 +
 151 +static int snd_fe_pi_audio_probe(struct platform_device *pdev)
 152 +{
 153 +       int ret = 0;
 154 +       struct snd_soc_card *card = &fe_pi_audio;
 155 +       struct device_node *np = pdev->dev.of_node;
 156 +       struct device_node *i2s_node;
 157 +       struct snd_soc_dai_link *dai = &snd_fe_pi_audio_dai[0];
 158 +
 159 +       fe_pi_audio.dev = &pdev->dev;
 160 +
 161 +       i2s_node = of_parse_phandle(np, "i2s-controller", 0);
 162 +       if (!i2s_node) {
 163 +               dev_err(&pdev->dev, "i2s_node phandle missing or invalid\n");
 164 +               return -EINVAL;
 165 +       }
 166 +
 167 +       dai->cpu_dai_name = NULL;
 168 +       dai->cpu_of_node = i2s_node;
 169 +       dai->platform_name = NULL;
 170 +       dai->platform_of_node = i2s_node;
 171 +
 172 +       of_node_put(i2s_node);
 173 +
 174 +       card->dev = &pdev->dev;
 175 +       platform_set_drvdata(pdev, card);
 176 +
 177 +       ret = snd_soc_register_card(card);
 178 +       if (ret && ret != -EPROBE_DEFER)
 179 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 180 +
 181 +       return ret;
 182 +}
 183 +
 184 +static int snd_fe_pi_audio_remove(struct platform_device *pdev)
 185 +{
 186 +       return snd_soc_unregister_card(&fe_pi_audio);
 187 +}
 188 +
 189 +static const struct of_device_id snd_fe_pi_audio_of_match[] = {
 190 +       { .compatible = "fe-pi,fe-pi-audio", },
 191 +       {},
 192 +};
 193 +MODULE_DEVICE_TABLE(of, snd_fe_pi_audio_of_match);
 194 +
 195 +static struct platform_driver snd_fe_pi_audio_driver = {
 196 +        .driver = {
 197 +                .name   = "snd-fe-pi-audio",
 198 +                .owner  = THIS_MODULE,
 199 +                .of_match_table = snd_fe_pi_audio_of_match,
 200 +        },
 201 +        .probe          = snd_fe_pi_audio_probe,
 202 +        .remove         = snd_fe_pi_audio_remove,
 203 +};
 204 +
 205 +module_platform_driver(snd_fe_pi_audio_driver);
 206 +
 207 +MODULE_AUTHOR("Henry Kupis <fe-pi@cox.net>");
 208 +MODULE_DESCRIPTION("ASoC Driver for Fe-Pi Audio");
 209 +MODULE_LICENSE("GPL v2");