target/linux/brcm2708/patches-4.9/950-0192-Add-support-for-Fe-Pi-audio-sound-card.-1867.patch

   1 From c646d023c75607a9ebc7296fe424d6eb4e804164 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  arch/arm/boot/dts/overlays/Makefile                |   1 +
  13  arch/arm/boot/dts/overlays/README                  |   6 +
  14  arch/arm/boot/dts/overlays/fe-pi-audio-overlay.dts |  70 +++++++++
  15  arch/arm/configs/bcm2709_defconfig                 |   1 +
  16  arch/arm/configs/bcmrpi_defconfig                  |   1 +
  17  sound/soc/bcm/Kconfig                              |   7 +
  18  sound/soc/bcm/Makefile                             |   2 +
  19  sound/soc/bcm/fe-pi-audio.c                        | 158 +++++++++++++++++++++
  20  8 files changed, 246 insertions(+)
  21  create mode 100644 arch/arm/boot/dts/overlays/fe-pi-audio-overlay.dts
  22  create mode 100644 sound/soc/bcm/fe-pi-audio.c
  23
  24 --- a/arch/arm/boot/dts/overlays/Makefile
  25 +++ b/arch/arm/boot/dts/overlays/Makefile
  26 @@ -20,6 +20,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  27         dwc2.dtbo \
  28         enc28j60.dtbo \
  29         enc28j60-spi2.dtbo \
  30 +       fe-pi-audio.dtbo \
  31         gpio-ir.dtbo \
  32         gpio-poweroff.dtbo \
  33         hifiberry-amp.dtbo \
  34 --- a/arch/arm/boot/dts/overlays/README
  35 +++ b/arch/arm/boot/dts/overlays/README
  36 @@ -383,6 +383,12 @@ Params: int_pin                 GPIO use
  37          speed                   SPI bus speed (default 12000000)
  38
  39
  40 +Name:   fe-pi-audio
  41 +Info:   Configures the Fe-Pi Audio Sound Card
  42 +Load:   dtoverlay=fe-pi-audio
  43 +Params: <None>
  44 +
  45 +
  46  Name:   gpio-ir
  47  Info:   Use GPIO pin as rc-core style infrared receiver input. The rc-core-
  48          based gpio_ir_recv driver maps received keys directly to a
  49 --- /dev/null
  50 +++ b/arch/arm/boot/dts/overlays/fe-pi-audio-overlay.dts
  51 @@ -0,0 +1,70 @@
  52 +// Definitions for Fe-Pi Audio
  53 +/dts-v1/;
  54 +/plugin/;
  55 +
  56 +/ {
  57 +       compatible = "brcm,bcm2708";
  58 +
  59 +       fragment@0 {
  60 +               target = <&clocks>;
  61 +               __overlay__ {
  62 +                       sgtl5000_mclk: sgtl5000_mclk {
  63 +                               compatible = "fixed-clock";
  64 +                               #clock-cells = <0>;
  65 +                               clock-frequency = <12288000>;
  66 +                               clock-output-names = "sgtl5000-mclk";
  67 +                       };
  68 +               };
  69 +       };
  70 +
  71 +       fragment@1 {
  72 +               target = <&soc>;
  73 +               __overlay__ {
  74 +                       reg_1v8: reg_1v8@0 {
  75 +                               compatible = "regulator-fixed";
  76 +                               regulator-name = "1V8";
  77 +                               regulator-min-microvolt = <1800000>;
  78 +                               regulator-max-microvolt = <1800000>;
  79 +                               regulator-always-on;
  80 +                       };
  81 +               };
  82 +       };
  83 +
  84 +       fragment@2 {
  85 +               target = <&i2c1>;
  86 +               __overlay__ {
  87 +                       #address-cells = <1>;
  88 +                       #size-cells = <0>;
  89 +                       status = "okay";
  90 +
  91 +                       sgtl5000@0a {
  92 +                               #sound-dai-cells = <0>;
  93 +                               compatible = "fepi,sgtl5000";
  94 +                               reg = <0x0a>;
  95 +                               clocks = <&sgtl5000_mclk>;
  96 +                               micbias-resistor-k-ohms = <2>;
  97 +                               micbias-voltage-m-volts = <3000>;
  98 +                               VDDA-supply = <&vdd_3v3_reg>;
  99 +                               VDDIO-supply = <&vdd_3v3_reg>;
 100 +                               VDDD-supply = <&reg_1v8>;
 101 +                               status = "okay";
 102 +                       };
 103 +               };
 104 +       };
 105 +
 106 +       fragment@3 {
 107 +               target = <&i2s>;
 108 +               __overlay__ {
 109 +                       status = "okay";
 110 +               };
 111 +       };
 112 +
 113 +       fragment@4 {
 114 +               target = <&sound>;
 115 +               __overlay__ {
 116 +                       compatible = "fe-pi,fe-pi-audio";
 117 +                       i2s-controller = <&i2s>;
 118 +                       status = "okay";
 119 +               };
 120 +       };
 121 +};
 122 --- a/arch/arm/configs/bcm2709_defconfig
 123 +++ b/arch/arm/configs/bcm2709_defconfig
 124 @@ -891,6 +891,7 @@ CONFIG_SND_DIGIDAC1_SOUNDCARD=m
 125  CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO=m
 126  CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2=m
 127  CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC=m
 128 +CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m
 129  CONFIG_SND_PISOUND=m
 130  CONFIG_SND_SOC_ADAU1701=m
 131  CONFIG_SND_SOC_ADAU7002=m
 132 --- a/arch/arm/configs/bcmrpi_defconfig
 133 +++ b/arch/arm/configs/bcmrpi_defconfig
 134 @@ -885,6 +885,7 @@ CONFIG_SND_DIGIDAC1_SOUNDCARD=m
 135  CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO=m
 136  CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2=m
 137  CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC=m
 138 +CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m
 139  CONFIG_SND_PISOUND=m
 140  CONFIG_SND_SOC_ADAU1701=m
 141  CONFIG_SND_SOC_ADAU7002=m
 142 --- a/sound/soc/bcm/Kconfig
 143 +++ b/sound/soc/bcm/Kconfig
 144 @@ -147,6 +147,13 @@ config SND_BCM2708_SOC_ALLO_PIANO_DAC
 145         help
 146           Say Y or M if you want to add support for Allo Piano DAC.
 147
 148 +config SND_BCM2708_SOC_FE_PI_AUDIO
 149 +       tristate "Support for Fe-Pi-Audio"
 150 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 151 +       select SND_SOC_SGTL5000
 152 +       help
 153 +         Say Y or M if you want to add support for Fe-Pi-Audio.
 154 +
 155  config SND_PISOUND
 156         tristate "Support for Blokas Labs pisound"
 157         depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 158 --- a/sound/soc/bcm/Makefile
 159 +++ b/sound/soc/bcm/Makefile
 160 @@ -28,6 +28,7 @@ snd-soc-dionaudio-loco-objs := dionaudio
 161  snd-soc-dionaudio-loco-v2-objs := dionaudio_loco-v2.o
 162  snd-soc-allo-piano-dac-objs := allo-piano-dac.o
 163  snd-soc-pisound-objs := pisound.o
 164 +snd-soc-fe-pi-audio-objs := fe-pi-audio.o
 165
 166  obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o
 167  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o
 168 @@ -48,3 +49,4 @@ obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_L
 169  obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2) += snd-soc-dionaudio-loco-v2.o
 170  obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o
 171  obj-$(CONFIG_SND_PISOUND) += snd-soc-pisound.o
 172 +obj-$(CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO) += snd-soc-fe-pi-audio.o
 173 --- /dev/null
 174 +++ b/sound/soc/bcm/fe-pi-audio.c
 175 @@ -0,0 +1,158 @@
 176 +/*
 177 + * ASoC Driver for Fe-Pi Audio Sound Card
 178 + *
 179 + * Author:     Henry Kupis <kuupaz@gmail.com>
 180 + *             Copyright 2016
 181 + *             based on code by Florian Meier <florian.meier@koalo.de>
 182 + *             based on code by Shawn Guo <shawn.guo@linaro.org>
 183 + *
 184 + * This program is free software; you can redistribute it and/or
 185 + * modify it under the terms of the GNU General Public License
 186 + * version 2 as published by the Free Software Foundation.
 187 + *
 188 + * This program is distributed in the hope that it will be useful, but
 189 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 190 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 191 + * General Public License for more details.
 192 + */
 193 +
 194 +#include <linux/module.h>
 195 +#include <linux/platform_device.h>
 196 +#include <linux/io.h>
 197 +
 198 +#include <sound/core.h>
 199 +#include <sound/pcm.h>
 200 +#include <sound/pcm_params.h>
 201 +#include <sound/soc.h>
 202 +#include <sound/jack.h>
 203 +
 204 +#include "../codecs/sgtl5000.h"
 205 +
 206 +static int snd_fe_pi_audio_init(struct snd_soc_pcm_runtime *rtd)
 207 +{
 208 +       struct snd_soc_card *card = rtd->card;
 209 +       struct snd_soc_codec *codec = rtd->codec;
 210 +
 211 +       snd_soc_dapm_force_enable_pin(&card->dapm, "LO");
 212 +       snd_soc_dapm_force_enable_pin(&card->dapm, "ADC");
 213 +       snd_soc_dapm_force_enable_pin(&card->dapm, "DAC");
 214 +       snd_soc_dapm_force_enable_pin(&card->dapm, "HP");
 215 +       snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER,
 216 +                       SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP);
 217 +
 218 +       return 0;
 219 +}
 220 +
 221 +static int snd_fe_pi_audio_hw_params(struct snd_pcm_substream *substream,
 222 +       struct snd_pcm_hw_params *params)
 223 +{
 224 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 225 +       struct device *dev = rtd->card->dev;
 226 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 227 +
 228 +       int ret;
 229 +
 230 +       /* Set SGTL5000's SYSCLK */
 231 +       ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, 12288000, SND_SOC_CLOCK_IN);
 232 +       if (ret) {
 233 +               dev_err(dev, "could not set codec driver clock params\n");
 234 +               return ret;
 235 +       }
 236 +
 237 +       return 0;
 238 +}
 239 +
 240 +
 241 +static struct snd_soc_ops snd_fe_pi_audio_ops = {
 242 +       .hw_params = snd_fe_pi_audio_hw_params,
 243 +};
 244 +
 245 +static struct snd_soc_dai_link snd_fe_pi_audio_dai[] = {
 246 +       {
 247 +               .name           = "FE-PI",
 248 +               .stream_name    = "Fe-Pi HiFi",
 249 +               .cpu_dai_name   = "bcm2708-i2s.0",
 250 +               .codec_dai_name = "sgtl5000",
 251 +               .platform_name  = "bcm2708-i2s.0",
 252 +               .codec_name     = "sgtl5000.1-000a",
 253 +               .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 254 +                                       SND_SOC_DAIFMT_CBM_CFM,
 255 +               .ops            = &snd_fe_pi_audio_ops,
 256 +               .init           = snd_fe_pi_audio_init,
 257 +       },
 258 +};
 259 +
 260 +static const struct snd_soc_dapm_route fe_pi_audio_dapm_routes[] = {
 261 +       {"ADC", NULL, "Mic Bias"},
 262 +};
 263 +
 264 +
 265 +static struct snd_soc_card fe_pi_audio = {
 266 +       .name         = "Fe-Pi Audio",
 267 +       .owner        = THIS_MODULE,
 268 +       .dai_link     = snd_fe_pi_audio_dai,
 269 +       .num_links    = ARRAY_SIZE(snd_fe_pi_audio_dai),
 270 +
 271 +       .dapm_routes = fe_pi_audio_dapm_routes,
 272 +       .num_dapm_routes = ARRAY_SIZE(fe_pi_audio_dapm_routes),
 273 +};
 274 +
 275 +static int snd_fe_pi_audio_probe(struct platform_device *pdev)
 276 +{
 277 +       int ret = 0;
 278 +       struct snd_soc_card *card = &fe_pi_audio;
 279 +       struct device_node *np = pdev->dev.of_node;
 280 +       struct device_node *i2s_node;
 281 +       struct snd_soc_dai_link *dai = &snd_fe_pi_audio_dai[0];
 282 +
 283 +       fe_pi_audio.dev = &pdev->dev;
 284 +
 285 +       i2s_node = of_parse_phandle(np, "i2s-controller", 0);
 286 +       if (!i2s_node) {
 287 +               dev_err(&pdev->dev, "i2s_node phandle missing or invalid\n");
 288 +               return -EINVAL;
 289 +       }
 290 +
 291 +       dai->cpu_dai_name = NULL;
 292 +       dai->cpu_of_node = i2s_node;
 293 +       dai->platform_name = NULL;
 294 +       dai->platform_of_node = i2s_node;
 295 +
 296 +       of_node_put(i2s_node);
 297 +
 298 +       card->dev = &pdev->dev;
 299 +       platform_set_drvdata(pdev, card);
 300 +
 301 +       ret = snd_soc_register_card(card);
 302 +       if (ret && ret != -EPROBE_DEFER)
 303 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 304 +
 305 +       return ret;
 306 +}
 307 +
 308 +static int snd_fe_pi_audio_remove(struct platform_device *pdev)
 309 +{
 310 +       return snd_soc_unregister_card(&fe_pi_audio);
 311 +}
 312 +
 313 +static const struct of_device_id snd_fe_pi_audio_of_match[] = {
 314 +       { .compatible = "fe-pi,fe-pi-audio", },
 315 +       {},
 316 +};
 317 +MODULE_DEVICE_TABLE(of, snd_fe_pi_audio_of_match);
 318 +
 319 +static struct platform_driver snd_fe_pi_audio_driver = {
 320 +        .driver = {
 321 +                .name   = "snd-fe-pi-audio",
 322 +                .owner  = THIS_MODULE,
 323 +                .of_match_table = snd_fe_pi_audio_of_match,
 324 +        },
 325 +        .probe          = snd_fe_pi_audio_probe,
 326 +        .remove         = snd_fe_pi_audio_remove,
 327 +};
 328 +
 329 +module_platform_driver(snd_fe_pi_audio_driver);
 330 +
 331 +MODULE_AUTHOR("Henry Kupis <fe-pi@cox.net>");
 332 +MODULE_DESCRIPTION("ASoC Driver for Fe-Pi Audio");
 333 +MODULE_LICENSE("GPL v2");