+++ /dev/null
-From ea3e9f892437a7afc78ac04e899fa35c155f198e Mon Sep 17 00:00:00 2001
-From: Matt Flax <flatmax@flatmax.org>
-Date: Mon, 16 May 2016 21:36:31 +1000
-Subject: [PATCH 350/423] New AudioInjector.net Pi soundcard with low jitter
- audio in and out.
-
-Contains the sound/soc/bcm ALSA machine driver and necessary alterations to the Kconfig and Makefile.
-Adds the dts overlay and updates the Makefile and README.
-Updates the relevant defconfig files to enable building for the Raspberry Pi.
-Thanks to Phil Elwell (pelwell) for the review, simple-card concepts and discussion. Thanks to Clive Messer for overlay naming suggestions.
----
- arch/arm/boot/dts/overlays/Makefile | 1 +
- arch/arm/boot/dts/overlays/README | 6 +
- .../audioinjector-wm8731-audio-overlay.dts | 39 ++++++
- arch/arm/configs/bcm2709_defconfig | 1 +
- arch/arm/configs/bcmrpi_defconfig | 1 +
- sound/soc/bcm/Kconfig | 7 +
- sound/soc/bcm/Makefile | 3 +
- sound/soc/bcm/audioinjector-pi-soundcard.c | 142 +++++++++++++++++++++
- 8 files changed, 200 insertions(+)
- create mode 100644 arch/arm/boot/dts/overlays/audioinjector-wm8731-audio-overlay.dts
- create mode 100644 sound/soc/bcm/audioinjector-pi-soundcard.c
-
---- a/arch/arm/boot/dts/overlays/Makefile
-+++ b/arch/arm/boot/dts/overlays/Makefile
-@@ -16,6 +16,7 @@ dtbo-$(RPI_DT_OVERLAYS) += adau1977-adc.
- dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
- dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
- dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
-+dtbo-$(RPI_DT_OVERLAYS) += audioinjector-wm8731-audio.dtbo
- dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
- dtbo-$(RPI_DT_OVERLAYS) += boomberry-dac.dtbo
- dtbo-$(RPI_DT_OVERLAYS) += boomberry-digi.dtbo
---- a/arch/arm/boot/dts/overlays/README
-+++ b/arch/arm/boot/dts/overlays/README
-@@ -225,6 +225,12 @@ Params: interrupt GPIO use
- arrays (0=+0pF, 15=+4.5pF, default 15)
-
-
-+Name: audioinjector-wm8731-audio
-+Info: Configures the audioinjector.net audio add on soundcard
-+Load: dtoverlay=audioinjector-wm8731-audio
-+Params: <None>
-+
-+
- Name: bmp085_i2c-sensor
- Info: Configures the BMP085/BMP180 digital barometric pressure and temperature
- sensors from Bosch Sensortec
---- /dev/null
-+++ b/arch/arm/boot/dts/overlays/audioinjector-wm8731-audio-overlay.dts
-@@ -0,0 +1,39 @@
-+// Definitions for audioinjector.net audio add on soundcard
-+/dts-v1/;
-+/plugin/;
-+
-+/ {
-+ compatible = "brcm,bcm2708";
-+
-+ fragment@0 {
-+ target = <&i2s>;
-+ __overlay__ {
-+ status = "okay";
-+ };
-+ };
-+
-+ fragment@1 {
-+ target = <&i2c1>;
-+ __overlay__ {
-+ #address-cells = <1>;
-+ #size-cells = <0>;
-+ status = "okay";
-+
-+ wm8731@1a {
-+ #sound-dai-cells = <0>;
-+ compatible = "wlf,wm8731";
-+ reg = <0x1a>;
-+ status = "okay";
-+ };
-+ };
-+ };
-+
-+ fragment@2 {
-+ target = <&sound>;
-+ __overlay__ {
-+ compatible = "ai,audioinjector-pi-soundcard";
-+ i2s-controller = <&i2s>;
-+ status = "okay";
-+ };
-+ };
-+};
---- a/arch/arm/configs/bcm2709_defconfig
-+++ b/arch/arm/configs/bcm2709_defconfig
-@@ -863,6 +863,7 @@ CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
- CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI=m
- CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
- CONFIG_SND_BCM2708_SOC_RASPIDAC3=m
-+CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m
- CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
- CONFIG_SND_SOC_ADAU1701=m
- CONFIG_SND_SOC_WM8804_I2C=m
---- a/arch/arm/configs/bcmrpi_defconfig
-+++ b/arch/arm/configs/bcmrpi_defconfig
-@@ -855,6 +855,7 @@ CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
- CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI=m
- CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
- CONFIG_SND_BCM2708_SOC_RASPIDAC3=m
-+CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m
- CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
- CONFIG_SND_SOC_ADAU1701=m
- CONFIG_SND_SOC_WM8804_I2C=m
---- a/sound/soc/bcm/Kconfig
-+++ b/sound/soc/bcm/Kconfig
-@@ -85,3 +85,10 @@ config SND_BCM2708_SOC_ADAU1977_ADC
- select SND_SOC_ADAU1977_I2C
- help
- Say Y or M if you want to add support for ADAU1977 ADC.
-+
-+config SND_AUDIOINJECTOR_PI_SOUNDCARD
-+ tristate "Support for audioinjector.net Pi add on soundcard"
-+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
-+ select SND_SOC_WM8731
-+ help
-+ Say Y or M if you want to add support for audioinjector.net Pi Hat
---- a/sound/soc/bcm/Makefile
-+++ b/sound/soc/bcm/Makefile
-@@ -15,6 +15,7 @@ snd-soc-rpi-dac-objs := rpi-dac.o
- snd-soc-rpi-proto-objs := rpi-proto.o
- snd-soc-iqaudio-dac-objs := iqaudio-dac.o
- snd-soc-raspidac3-objs := raspidac3.o
-+snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
-
- obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o
- obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
-@@ -27,3 +28,5 @@ obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) +=
- obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
- obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
- obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) += snd-soc-raspidac3.o
-+obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
-+
---- /dev/null
-+++ b/sound/soc/bcm/audioinjector-pi-soundcard.c
-@@ -0,0 +1,142 @@
-+/*
-+ * ASoC Driver for AudioInjector Pi add on soundcard
-+ *
-+ * Created on: 13-May-2016
-+ * Author: flatmax@flatmax.org
-+ * based on code by Cliff Cai <Cliff.Cai@analog.com> for the ssm2602 machine blackfin.
-+ * with help from Lars-Peter Clausen for simplifying the original code to use the dai_fmt field.
-+ * i2s_node code taken from the other sound/soc/bcm machine drivers.
-+ *
-+ * Copyright (C) 2016 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 <sound/core.h>
-+#include <sound/soc.h>
-+#include <sound/pcm_params.h>
-+#include <sound/control.h>
-+
-+#include "../codecs/wm8731.h"
-+
-+static int audioinjector_pi_soundcard_dai_init(struct snd_soc_pcm_runtime *rtd)
-+{
-+ struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
-+
-+ // not connected
-+ snd_soc_dapm_nc_pin(dapm, "Mic Bias");
-+ snd_soc_dapm_nc_pin(dapm, "MICIN");
-+ snd_soc_dapm_nc_pin(dapm, "RHPOUT");
-+ snd_soc_dapm_nc_pin(dapm, "LHPOUT");
-+
-+ return snd_soc_dai_set_sysclk(rtd->codec_dai, WM8731_SYSCLK_XTAL, 12000000, SND_SOC_CLOCK_IN);
-+}
-+
-+static struct snd_soc_dai_link audioinjector_pi_soundcard_dai[] = {
-+ {
-+ .name = "AudioInjector audio",
-+ .stream_name = "AudioInjector audio",
-+ .cpu_dai_name = "bcm2708-i2s.0",
-+ .codec_dai_name = "wm8731-hifi",
-+ .platform_name = "bcm2835-i2s.0",
-+ .codec_name = "wm8731.1-001a",
-+ .init = audioinjector_pi_soundcard_dai_init,
-+ .dai_fmt = SND_SOC_DAIFMT_CBM_CFM|SND_SOC_DAIFMT_I2S|SND_SOC_DAIFMT_NB_NF,
-+ },
-+};
-+
-+static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
-+ SND_SOC_DAPM_SPK("Ext Spk", NULL),
-+ SND_SOC_DAPM_LINE("Line In Jacks", NULL),
-+};
-+
-+/* Corgi machine connections to the codec pins */
-+static const struct snd_soc_dapm_route audioinjector_audio_map[] = {
-+ /* speaker connected to LOUT, ROUT */
-+ {"Ext Spk", NULL, "ROUT"},
-+ {"Ext Spk", NULL, "LOUT"},
-+
-+ /* line inputs */
-+ {"Line In Jacks", NULL, "Line Input"},
-+};
-+
-+static struct snd_soc_card snd_soc_audioinjector = {
-+ .name = "audioinjector-pi-soundcard",
-+ .dai_link = audioinjector_pi_soundcard_dai,
-+ .num_links = 1,
-+
-+ .dapm_widgets = wm8731_dapm_widgets,
-+ .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
-+ .dapm_routes = audioinjector_audio_map,
-+ .num_dapm_routes = ARRAY_SIZE(audioinjector_audio_map),
-+};
-+
-+static int audioinjector_pi_soundcard_probe(struct platform_device *pdev)
-+{
-+ struct snd_soc_card *card = &snd_soc_audioinjector;
-+ int ret;
-+
-+ card->dev = &pdev->dev;
-+
-+ if (pdev->dev.of_node) {
-+ struct snd_soc_dai_link *dai = &audioinjector_pi_soundcard_dai[0];
-+ struct device_node *i2s_node = of_parse_phandle(pdev->dev.of_node,
-+ "i2s-controller", 0);
-+
-+ if (i2s_node) {
-+ dai->cpu_dai_name = NULL;
-+ dai->cpu_of_node = i2s_node;
-+ dai->platform_name = NULL;
-+ dai->platform_of_node = i2s_node;
-+ } else
-+ if (!dai->cpu_of_node) {
-+ dev_err(&pdev->dev, "Property 'i2s-controller' missing or invalid\n");
-+ return -EINVAL;
-+ }
-+ }
-+
-+ if ((ret = snd_soc_register_card(card))) {
-+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
-+ }
-+ return ret;
-+}
-+
-+static int audioinjector_pi_soundcard_remove(struct platform_device *pdev)
-+{
-+ struct snd_soc_card *card = platform_get_drvdata(pdev);
-+ return snd_soc_unregister_card(card);
-+
-+}
-+
-+static const struct of_device_id audioinjector_pi_soundcard_of_match[] = {
-+ { .compatible = "ai,audioinjector-pi-soundcard", },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, audioinjector_pi_soundcard_of_match);
-+
-+static struct platform_driver audioinjector_pi_soundcard_driver = {
-+ .driver = {
-+ .name = "audioinjector-audio",
-+ .owner = THIS_MODULE,
-+ .of_match_table = audioinjector_pi_soundcard_of_match,
-+ },
-+ .probe = audioinjector_pi_soundcard_probe,
-+ .remove = audioinjector_pi_soundcard_remove,
-+};
-+
-+module_platform_driver(audioinjector_pi_soundcard_driver);
-+MODULE_AUTHOR("Matt Flax <flatmax@flatmax.org>");
-+MODULE_DESCRIPTION("AudioInjector.net Pi Soundcard");
-+MODULE_LICENSE("GPL v2");
-+MODULE_ALIAS("platform:audioinjector-pi-soundcard");
-+
projects / openwrt / openwrt.git / blobdiff