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openwrt/target/linux/bcm27xx/patches-5.4/950-0627-Add-support-for-th...

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From 5b37b08ff1c29e7386eb8a29b168e94e33cf82c3 Mon Sep 17 00:00:00 2001
From: Matt Flax <flatmax@flatmax.org>
Date: Wed, 8 Apr 2020 20:00:30 +1000
Subject: [PATCH] Add support for the AudioInjector.net Isolated sound
card
This patch adds support for the Audio Injector Isolated sound card.
Signed-off-by: Matt Flax <flatmax@flatmax.org>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 6 +
...dioinjector-isolated-soundcard-overlay.dts | 55 ++++++
sound/soc/bcm/Kconfig | 7 +
sound/soc/bcm/Makefile | 2 +
.../bcm/audioinjector-isolated-soundcard.c | 183 ++++++++++++++++++
11 files changed, 259 insertions(+), 5 deletions(-)
create mode 100644 arch/arm/boot/dts/overlays/audioinjector-isolated-soundcard-overlay.dts
create mode 100644 sound/soc/bcm/audioinjector-isolated-soundcard.c
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -22,6 +22,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
applepi-dac.dtbo \
at86rf233.dtbo \
audioinjector-addons.dtbo \
+ audioinjector-isolated-soundcard.dtbo \
audioinjector-ultra.dtbo \
audioinjector-wm8731-audio.dtbo \
audiosense-pi.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -505,6 +505,12 @@ Params: non-stop-clocks Keeps th
is paused or stopped (default off)
+Name: audioinjector-isolated-soundcard
+Info: Configures the audioinjector.net isolated soundcard
+Load: dtoverlay=audioinjector-isolated-soundcard
+Params: <None>
+
+
Name: audioinjector-ultra
Info: Configures the audioinjector.net ultra soundcard
Load: dtoverlay=audioinjector-ultra
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/audioinjector-isolated-soundcard-overlay.dts
@@ -0,0 +1,55 @@
+// Definitions for audioinjector.net audio isolated soundcard
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835";
+
+ fragment@0 {
+ target = <&i2s>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+
+ fragment@1 {
+ target-path = "/";
+ __overlay__ {
+ cs4272_mclk: codec-mclk {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <24576000>;
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&i2c1>;
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ cs4272: cs4271@10 {
+ #sound-dai-cells = <0>;
+ compatible = "cirrus,cs4271";
+ reg = <0x10>;
+ reset-gpio = <&gpio 5 0>;
+ clocks = <&cs4272_mclk>;
+ clock-names = "mclk";
+ status = "okay";
+ };
+ };
+ };
+
+ fragment@3 {
+ target = <&sound>;
+ snd: __overlay__ {
+ compatible = "ai,audioinjector-isolated-soundcard";
+ mute-gpios = <&gpio 17 0>;
+ i2s-controller = <&i2s>;
+ codec = <&cs4272>;
+ status = "okay";
+ };
+ };
+};
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -192,6 +192,13 @@ config SND_AUDIOINJECTOR_OCTO_SOUNDCARD
help
Say Y or M if you want to add support for audioinjector.net octo add on
+config SND_AUDIOINJECTOR_ISOLATED_SOUNDCARD
+ tristate "Support for audioinjector.net isolated DAC and ADC soundcard"
+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+ select SND_SOC_CS4271_I2C
+ help
+ Say Y or M if you want to add support for audioinjector.net isolated soundcard
+
config SND_AUDIOSENSE_PI
tristate "Support for AudioSense Add-On Soundcard"
depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -27,6 +27,7 @@ snd-soc-iqaudio-dac-objs := iqaudio-dac.
snd-soc-i-sabre-q2m-objs := i-sabre-q2m.o
snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
snd-soc-audioinjector-octo-soundcard-objs := audioinjector-octo-soundcard.o
+snd-soc-audioinjector-isolated-soundcard-objs := audioinjector-isolated-soundcard.o
snd-soc-audiosense-pi-objs := audiosense-pi.o
snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o
snd-soc-dionaudio-loco-objs := dionaudio_loco.o
@@ -55,6 +56,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC
obj-$(CONFIG_SND_BCM2708_SOC_I_SABRE_Q2M) += snd-soc-i-sabre-q2m.o
obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
obj-$(CONFIG_SND_AUDIOINJECTOR_OCTO_SOUNDCARD) += snd-soc-audioinjector-octo-soundcard.o
+obj-$(CONFIG_SND_AUDIOINJECTOR_ISOLATED_SOUNDCARD) += snd-soc-audioinjector-isolated-soundcard.o
obj-$(CONFIG_SND_AUDIOSENSE_PI) += snd-soc-audiosense-pi.o
obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o
obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o
--- /dev/null
+++ b/sound/soc/bcm/audioinjector-isolated-soundcard.c
@@ -0,0 +1,183 @@
+/*
+ * ASoC Driver for AudioInjector.net isolated soundcard
+ *
+ * Created on: 20-February-2020
+ * Author: flatmax@flatmax.org
+ * based on audioinjector-octo-soundcard.c
+ *
+ * Copyright (C) 2020 Flatmax Pty. Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/gpio/consumer.h>
+
+#include <sound/core.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include <sound/control.h>
+
+static struct gpio_desc *mute_gpio;
+
+static const unsigned int audioinjector_isolated_rates[] = {
+ 192000, 96000, 48000, 32000, 24000, 16000, 8000
+};
+
+static struct snd_pcm_hw_constraint_list audioinjector_isolated_constraints = {
+ .list = audioinjector_isolated_rates,
+ .count = ARRAY_SIZE(audioinjector_isolated_rates),
+};
+
+static int audioinjector_isolated_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+ int ret=snd_soc_dai_set_sysclk(rtd->codec_dai, 0, 24576000, 0);
+ if (ret)
+ return ret;
+
+ return snd_soc_dai_set_bclk_ratio(rtd->cpu_dai, 64);
+}
+
+static int audioinjector_isolated_startup(struct snd_pcm_substream *substream)
+{
+ snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE, &audioinjector_isolated_constraints);
+
+ return 0;
+}
+
+static int audioinjector_isolated_trigger(struct snd_pcm_substream *substream,
+ int cmd){
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ gpiod_set_value(mute_gpio, 0);
+ break;
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ gpiod_set_value(mute_gpio, 1);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static struct snd_soc_ops audioinjector_isolated_ops = {
+ .startup = audioinjector_isolated_startup,
+ .trigger = audioinjector_isolated_trigger,
+};
+
+SND_SOC_DAILINK_DEFS(audioinjector_isolated,
+ DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")),
+ DAILINK_COMP_ARRAY(COMP_CODEC("cs4271.1-0010", "cs4271-hifi")),
+ DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0")));
+
+static struct snd_soc_dai_link audioinjector_isolated_dai[] = {
+ {
+ .name = "AudioInjector ISO",
+ .stream_name = "AI-HIFI",
+ .ops = &audioinjector_isolated_ops,
+ .init = audioinjector_isolated_dai_init,
+ .symmetric_rates = 1,
+ .symmetric_channels = 1,
+ .dai_fmt = SND_SOC_DAIFMT_CBM_CFM|SND_SOC_DAIFMT_I2S|SND_SOC_DAIFMT_NB_NF,
+ SND_SOC_DAILINK_REG(audioinjector_isolated),
+ }
+};
+
+static const struct snd_soc_dapm_widget audioinjector_isolated_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("OUTPUTS"),
+ SND_SOC_DAPM_INPUT("INPUTS"),
+};
+
+static const struct snd_soc_dapm_route audioinjector_isolated_route[] = {
+ /* Balanced outputs */
+ {"OUTPUTS", NULL, "AOUTA+"},
+ {"OUTPUTS", NULL, "AOUTA-"},
+ {"OUTPUTS", NULL, "AOUTB+"},
+ {"OUTPUTS", NULL, "AOUTB-"},
+
+ /* Balanced inputs */
+ {"AINA", NULL, "INPUTS"},
+ {"AINB", NULL, "INPUTS"},
+};
+
+static struct snd_soc_card snd_soc_audioinjector_isolated = {
+ .name = "audioinjector-isolated-soundcard",
+ .dai_link = audioinjector_isolated_dai,
+ .num_links = ARRAY_SIZE(audioinjector_isolated_dai),
+
+ .dapm_widgets = audioinjector_isolated_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(audioinjector_isolated_widgets),
+ .dapm_routes = audioinjector_isolated_route,
+ .num_dapm_routes = ARRAY_SIZE(audioinjector_isolated_route),
+};
+
+static int audioinjector_isolated_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = &snd_soc_audioinjector_isolated;
+ int ret;
+
+ card->dev = &pdev->dev;
+
+ if (pdev->dev.of_node) {
+ struct snd_soc_dai_link *dai = &audioinjector_isolated_dai[0];
+ struct device_node *i2s_node =
+ of_parse_phandle(pdev->dev.of_node, "i2s-controller", 0);
+
+ if (i2s_node) {
+ dai->cpus->dai_name = NULL;
+ dai->cpus->of_node = i2s_node;
+ dai->platforms->name = NULL;
+ dai->platforms->of_node = i2s_node;
+ } else {
+ dev_err(&pdev->dev,
+ "i2s-controller missing or invalid in DT\n");
+ return -EINVAL;
+ }
+
+ mute_gpio = devm_gpiod_get_optional(&pdev->dev, "mute", GPIOD_OUT_LOW);
+ if (IS_ERR(mute_gpio)){
+ dev_err(&pdev->dev, "mute gpio not found in dt overlay\n");
+ return PTR_ERR(mute_gpio);
+ }
+ }
+
+ ret = devm_snd_soc_register_card(&pdev->dev, card);
+ if (ret && ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+ return ret;
+}
+
+static const struct of_device_id audioinjector_isolated_of_match[] = {
+ { .compatible = "ai,audioinjector-isolated-soundcard", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, audioinjector_isolated_of_match);
+
+static struct platform_driver audioinjector_isolated_driver = {
+ .driver = {
+ .name = "audioinjector-isolated",
+ .owner = THIS_MODULE,
+ .of_match_table = audioinjector_isolated_of_match,
+ },
+ .probe = audioinjector_isolated_probe,
+};
+
+module_platform_driver(audioinjector_isolated_driver);
+MODULE_AUTHOR("Matt Flax <flatmax@flatmax.org>");
+MODULE_DESCRIPTION("AudioInjector.net isolated Soundcard");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:audioinjector-isolated-soundcard");
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