target/linux/bcm27xx/patches-5.4/950-0627-Add-support-for-the-AudioInjector.net-Isolated-sound.patch

   1 From 5b37b08ff1c29e7386eb8a29b168e94e33cf82c3 Mon Sep 17 00:00:00 2001
   2 From: Matt Flax <flatmax@flatmax.org>
   3 Date: Wed, 8 Apr 2020 20:00:30 +1000
   4 Subject: [PATCH] Add support for the AudioInjector.net Isolated sound
   5  card
   6
   7 This patch adds support for the Audio Injector Isolated sound card.
   8
   9 Signed-off-by: Matt Flax <flatmax@flatmax.org>
  10 ---
  11  arch/arm/boot/dts/overlays/Makefile           |   1 +
  12  arch/arm/boot/dts/overlays/README             |   6 +
  13  ...dioinjector-isolated-soundcard-overlay.dts |  55 ++++++
  14  sound/soc/bcm/Kconfig                         |   7 +
  15  sound/soc/bcm/Makefile                        |   2 +
  16  .../bcm/audioinjector-isolated-soundcard.c    | 183 ++++++++++++++++++
  17  11 files changed, 259 insertions(+), 5 deletions(-)
  18  create mode 100644 arch/arm/boot/dts/overlays/audioinjector-isolated-soundcard-overlay.dts
  19  create mode 100644 sound/soc/bcm/audioinjector-isolated-soundcard.c
  20
  21 --- a/arch/arm/boot/dts/overlays/Makefile
  22 +++ b/arch/arm/boot/dts/overlays/Makefile
  23 @@ -22,6 +22,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  24         applepi-dac.dtbo \
  25         at86rf233.dtbo \
  26         audioinjector-addons.dtbo \
  27 +       audioinjector-isolated-soundcard.dtbo \
  28         audioinjector-ultra.dtbo \
  29         audioinjector-wm8731-audio.dtbo \
  30         audiosense-pi.dtbo \
  31 --- a/arch/arm/boot/dts/overlays/README
  32 +++ b/arch/arm/boot/dts/overlays/README
  33 @@ -505,6 +505,12 @@ Params: non-stop-clocks         Keeps th
  34                                  is paused or stopped (default off)
  35
  36
  37 +Name:   audioinjector-isolated-soundcard
  38 +Info:   Configures the audioinjector.net isolated soundcard
  39 +Load:   dtoverlay=audioinjector-isolated-soundcard
  40 +Params: <None>
  41 +
  42 +
  43  Name:   audioinjector-ultra
  44  Info:   Configures the audioinjector.net ultra soundcard
  45  Load:   dtoverlay=audioinjector-ultra
  46 --- /dev/null
  47 +++ b/arch/arm/boot/dts/overlays/audioinjector-isolated-soundcard-overlay.dts
  48 @@ -0,0 +1,55 @@
  49 +// Definitions for audioinjector.net audio isolated soundcard
  50 +/dts-v1/;
  51 +/plugin/;
  52 +
  53 +/ {
  54 +       compatible = "brcm,bcm2835";
  55 +
  56 +       fragment@0 {
  57 +               target = <&i2s>;
  58 +               __overlay__ {
  59 +                       status = "okay";
  60 +               };
  61 +       };
  62 +
  63 +       fragment@1 {
  64 +               target-path = "/";
  65 +               __overlay__ {
  66 +                       cs4272_mclk: codec-mclk {
  67 +                               compatible = "fixed-clock";
  68 +                               #clock-cells = <0>;
  69 +                               clock-frequency = <24576000>;
  70 +                       };
  71 +               };
  72 +       };
  73 +
  74 +       fragment@2 {
  75 +               target = <&i2c1>;
  76 +               __overlay__ {
  77 +                       #address-cells = <1>;
  78 +                       #size-cells = <0>;
  79 +                       status = "okay";
  80 +
  81 +                       cs4272: cs4271@10 {
  82 +                               #sound-dai-cells = <0>;
  83 +                               compatible = "cirrus,cs4271";
  84 +                               reg = <0x10>;
  85 +                               reset-gpio = <&gpio 5 0>;
  86 +                               clocks = <&cs4272_mclk>;
  87 +                               clock-names = "mclk";
  88 +                               status = "okay";
  89 +                       };
  90 +               };
  91 +       };
  92 +
  93 +       fragment@3 {
  94 +               target = <&sound>;
  95 +               snd: __overlay__ {
  96 +                       compatible = "ai,audioinjector-isolated-soundcard";
  97 +                       mute-gpios = <&gpio 17 0>;
  98 +                       i2s-controller = <&i2s>;
  99 +                       codec = <&cs4272>;
 100 +                       status = "okay";
 101 +               };
 102 +       };
 103 +};
 104 --- a/sound/soc/bcm/Kconfig
 105 +++ b/sound/soc/bcm/Kconfig
 106 @@ -192,6 +192,13 @@ config SND_AUDIOINJECTOR_OCTO_SOUNDCARD
 107         help
 108           Say Y or M if you want to add support for audioinjector.net octo add on
 109
 110 +config SND_AUDIOINJECTOR_ISOLATED_SOUNDCARD
 111 +       tristate "Support for audioinjector.net isolated DAC and ADC soundcard"
 112 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 113 +       select SND_SOC_CS4271_I2C
 114 +       help
 115 +         Say Y or M if you want to add support for audioinjector.net isolated soundcard
 116 +
 117  config SND_AUDIOSENSE_PI
 118         tristate "Support for AudioSense Add-On Soundcard"
 119         depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 120 --- a/sound/soc/bcm/Makefile
 121 +++ b/sound/soc/bcm/Makefile
 122 @@ -27,6 +27,7 @@ snd-soc-iqaudio-dac-objs := iqaudio-dac.
 123   snd-soc-i-sabre-q2m-objs := i-sabre-q2m.o
 124  snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
 125  snd-soc-audioinjector-octo-soundcard-objs := audioinjector-octo-soundcard.o
 126 +snd-soc-audioinjector-isolated-soundcard-objs := audioinjector-isolated-soundcard.o
 127  snd-soc-audiosense-pi-objs := audiosense-pi.o
 128  snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o
 129  snd-soc-dionaudio-loco-objs := dionaudio_loco.o
 130 @@ -55,6 +56,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC
 131   obj-$(CONFIG_SND_BCM2708_SOC_I_SABRE_Q2M) += snd-soc-i-sabre-q2m.o
 132  obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
 133  obj-$(CONFIG_SND_AUDIOINJECTOR_OCTO_SOUNDCARD) += snd-soc-audioinjector-octo-soundcard.o
 134 +obj-$(CONFIG_SND_AUDIOINJECTOR_ISOLATED_SOUNDCARD) += snd-soc-audioinjector-isolated-soundcard.o
 135  obj-$(CONFIG_SND_AUDIOSENSE_PI) += snd-soc-audiosense-pi.o
 136  obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o
 137  obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o
 138 --- /dev/null
 139 +++ b/sound/soc/bcm/audioinjector-isolated-soundcard.c
 140 @@ -0,0 +1,183 @@
 141 +/*
 142 + * ASoC Driver for AudioInjector.net isolated soundcard
 143 + *
 144 + *  Created on: 20-February-2020
 145 + *      Author: flatmax@flatmax.org
 146 + *              based on audioinjector-octo-soundcard.c
 147 + *
 148 + * Copyright (C) 2020 Flatmax Pty. Ltd.
 149 + *
 150 + * This program is free software; you can redistribute it and/or
 151 + * modify it under the terms of the GNU General Public License
 152 + * version 2 as published by the Free Software Foundation.
 153 + *
 154 + * This program is distributed in the hope that it will be useful, but
 155 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 156 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 157 + * General Public License for more details.
 158 + */
 159 +
 160 +#include <linux/module.h>
 161 +#include <linux/types.h>
 162 +#include <linux/gpio/consumer.h>
 163 +
 164 +#include <sound/core.h>
 165 +#include <sound/soc.h>
 166 +#include <sound/pcm_params.h>
 167 +#include <sound/control.h>
 168 +
 169 +static struct gpio_desc *mute_gpio;
 170 +
 171 +static const unsigned int audioinjector_isolated_rates[] = {
 172 +       192000, 96000, 48000, 32000, 24000, 16000, 8000
 173 +};
 174 +
 175 +static struct snd_pcm_hw_constraint_list audioinjector_isolated_constraints = {
 176 +       .list = audioinjector_isolated_rates,
 177 +       .count = ARRAY_SIZE(audioinjector_isolated_rates),
 178 +};
 179 +
 180 +static int audioinjector_isolated_dai_init(struct snd_soc_pcm_runtime *rtd)
 181 +{
 182 +       int ret=snd_soc_dai_set_sysclk(rtd->codec_dai, 0, 24576000, 0);
 183 +       if (ret)
 184 +               return ret;
 185 +
 186 +       return snd_soc_dai_set_bclk_ratio(rtd->cpu_dai, 64);
 187 +}
 188 +
 189 +static int audioinjector_isolated_startup(struct snd_pcm_substream *substream)
 190 +{
 191 +       snd_pcm_hw_constraint_list(substream->runtime, 0,
 192 +                               SNDRV_PCM_HW_PARAM_RATE, &audioinjector_isolated_constraints);
 193 +
 194 +       return 0;
 195 +}
 196 +
 197 +static int audioinjector_isolated_trigger(struct snd_pcm_substream *substream,
 198 +                                                               int cmd){
 199 +
 200 +       switch (cmd) {
 201 +       case SNDRV_PCM_TRIGGER_STOP:
 202 +       case SNDRV_PCM_TRIGGER_SUSPEND:
 203 +       case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 204 +               gpiod_set_value(mute_gpio, 0);
 205 +               break;
 206 +       case SNDRV_PCM_TRIGGER_START:
 207 +       case SNDRV_PCM_TRIGGER_RESUME:
 208 +       case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 209 +               gpiod_set_value(mute_gpio, 1);
 210 +               break;
 211 +       default:
 212 +               return -EINVAL;
 213 +       }
 214 +       return 0;
 215 +}
 216 +
 217 +static struct snd_soc_ops audioinjector_isolated_ops = {
 218 +       .startup        = audioinjector_isolated_startup,
 219 +       .trigger = audioinjector_isolated_trigger,
 220 +};
 221 +
 222 +SND_SOC_DAILINK_DEFS(audioinjector_isolated,
 223 +       DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")),
 224 +       DAILINK_COMP_ARRAY(COMP_CODEC("cs4271.1-0010", "cs4271-hifi")),
 225 +       DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0")));
 226 +
 227 +static struct snd_soc_dai_link audioinjector_isolated_dai[] = {
 228 +       {
 229 +               .name = "AudioInjector ISO",
 230 +               .stream_name = "AI-HIFI",
 231 +               .ops = &audioinjector_isolated_ops,
 232 +               .init = audioinjector_isolated_dai_init,
 233 +               .symmetric_rates = 1,
 234 +               .symmetric_channels = 1,
 235 +               .dai_fmt = SND_SOC_DAIFMT_CBM_CFM|SND_SOC_DAIFMT_I2S|SND_SOC_DAIFMT_NB_NF,
 236 +               SND_SOC_DAILINK_REG(audioinjector_isolated),
 237 +       }
 238 +};
 239 +
 240 +static const struct snd_soc_dapm_widget audioinjector_isolated_widgets[] = {
 241 +       SND_SOC_DAPM_OUTPUT("OUTPUTS"),
 242 +       SND_SOC_DAPM_INPUT("INPUTS"),
 243 +};
 244 +
 245 +static const struct snd_soc_dapm_route audioinjector_isolated_route[] = {
 246 +       /* Balanced outputs */
 247 +       {"OUTPUTS", NULL, "AOUTA+"},
 248 +       {"OUTPUTS", NULL, "AOUTA-"},
 249 +       {"OUTPUTS", NULL, "AOUTB+"},
 250 +       {"OUTPUTS", NULL, "AOUTB-"},
 251 +
 252 +       /* Balanced inputs */
 253 +       {"AINA", NULL, "INPUTS"},
 254 +       {"AINB", NULL, "INPUTS"},
 255 +};
 256 +
 257 +static struct snd_soc_card snd_soc_audioinjector_isolated = {
 258 +       .name = "audioinjector-isolated-soundcard",
 259 +       .dai_link = audioinjector_isolated_dai,
 260 +       .num_links = ARRAY_SIZE(audioinjector_isolated_dai),
 261 +
 262 +       .dapm_widgets = audioinjector_isolated_widgets,
 263 +       .num_dapm_widgets = ARRAY_SIZE(audioinjector_isolated_widgets),
 264 +       .dapm_routes = audioinjector_isolated_route,
 265 +       .num_dapm_routes = ARRAY_SIZE(audioinjector_isolated_route),
 266 +};
 267 +
 268 +static int audioinjector_isolated_probe(struct platform_device *pdev)
 269 +{
 270 +       struct snd_soc_card *card = &snd_soc_audioinjector_isolated;
 271 +       int ret;
 272 +
 273 +       card->dev = &pdev->dev;
 274 +
 275 +       if (pdev->dev.of_node) {
 276 +               struct snd_soc_dai_link *dai = &audioinjector_isolated_dai[0];
 277 +               struct device_node *i2s_node =
 278 +                                       of_parse_phandle(pdev->dev.of_node, "i2s-controller", 0);
 279 +
 280 +               if (i2s_node) {
 281 +                       dai->cpus->dai_name = NULL;
 282 +                       dai->cpus->of_node = i2s_node;
 283 +                       dai->platforms->name = NULL;
 284 +                       dai->platforms->of_node = i2s_node;
 285 +               } else {
 286 +                               dev_err(&pdev->dev,
 287 +                               "i2s-controller missing or invalid in DT\n");
 288 +                               return -EINVAL;
 289 +               }
 290 +
 291 +               mute_gpio = devm_gpiod_get_optional(&pdev->dev, "mute", GPIOD_OUT_LOW);
 292 +               if (IS_ERR(mute_gpio)){
 293 +                       dev_err(&pdev->dev, "mute gpio not found in dt overlay\n");
 294 +                       return PTR_ERR(mute_gpio);
 295 +               }
 296 +       }
 297 +
 298 +       ret = devm_snd_soc_register_card(&pdev->dev, card);
 299 +       if (ret && ret != -EPROBE_DEFER)
 300 +               dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 301 +       return ret;
 302 +}
 303 +
 304 +static const struct of_device_id audioinjector_isolated_of_match[] = {
 305 +       { .compatible = "ai,audioinjector-isolated-soundcard", },
 306 +       {},
 307 +};
 308 +MODULE_DEVICE_TABLE(of, audioinjector_isolated_of_match);
 309 +
 310 +static struct platform_driver audioinjector_isolated_driver = {
 311 +       .driver = {
 312 +               .name                   = "audioinjector-isolated",
 313 +               .owner                  = THIS_MODULE,
 314 +               .of_match_table = audioinjector_isolated_of_match,
 315 +       },
 316 +       .probe  = audioinjector_isolated_probe,
 317 +};
 318 +
 319 +module_platform_driver(audioinjector_isolated_driver);
 320 +MODULE_AUTHOR("Matt Flax <flatmax@flatmax.org>");
 321 +MODULE_DESCRIPTION("AudioInjector.net isolated Soundcard");
 322 +MODULE_LICENSE("GPL v2");
 323 +MODULE_ALIAS("platform:audioinjector-isolated-soundcard");