mirror of https://github.com/hak5/openwrt.git
285 lines
9.5 KiB
Diff
285 lines
9.5 KiB
Diff
From ae776ef7eb34d99945aadbaa607e1aec66fd04d0 Mon Sep 17 00:00:00 2001
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From: Matt Flax <flatmax@flatmax.org>
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Date: Mon, 16 May 2016 21:36:31 +1000
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Subject: [PATCH] New AudioInjector.net Pi soundcard with low jitter audio in
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and out.
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Contains the sound/soc/bcm ALSA machine driver and necessary alterations to the Kconfig and Makefile.
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Adds the dts overlay and updates the Makefile and README.
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Updates the relevant defconfig files to enable building for the Raspberry Pi.
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Thanks to Phil Elwell (pelwell) for the review, simple-card concepts and discussion. Thanks to Clive Messer for overlay naming suggestions.
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 6 +
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.../audioinjector-wm8731-audio-overlay.dts | 39 ++++++
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arch/arm/configs/bcm2709_defconfig | 1 +
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arch/arm/configs/bcmrpi_defconfig | 1 +
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sound/soc/bcm/Kconfig | 7 +
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sound/soc/bcm/Makefile | 3 +
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sound/soc/bcm/audioinjector-pi-soundcard.c | 142 +++++++++++++++++++++
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8 files changed, 200 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/audioinjector-wm8731-audio-overlay.dts
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create mode 100644 sound/soc/bcm/audioinjector-pi-soundcard.c
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -16,6 +16,7 @@ dtbo-$(RPI_DT_OVERLAYS) += adau1977-adc.
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dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
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+dtbo-$(RPI_DT_OVERLAYS) += audioinjector-wm8731-audio.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += boomberry-dac.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += boomberry-digi.dtbo
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -225,6 +225,12 @@ Params: interrupt GPIO use
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arrays (0=+0pF, 15=+4.5pF, default 15)
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+Name: audioinjector-wm8731-audio
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+Info: Configures the audioinjector.net audio add on soundcard
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+Load: dtoverlay=audioinjector-wm8731-audio
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+Params: <None>
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+
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+
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Name: bmp085_i2c-sensor
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Info: Configures the BMP085/BMP180 digital barometric pressure and temperature
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sensors from Bosch Sensortec
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/audioinjector-wm8731-audio-overlay.dts
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@@ -0,0 +1,39 @@
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+// Definitions for audioinjector.net audio add on soundcard
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+/dts-v1/;
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+/plugin/;
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+
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+/ {
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+ compatible = "brcm,bcm2708";
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+
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+ fragment@0 {
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+ target = <&i2s>;
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+ __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&i2c1>;
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+ __overlay__ {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ status = "okay";
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+
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+ wm8731@1a {
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+ #sound-dai-cells = <0>;
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+ compatible = "wlf,wm8731";
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+ reg = <0x1a>;
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+ status = "okay";
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+ };
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&sound>;
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+ __overlay__ {
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+ compatible = "ai,audioinjector-pi-soundcard";
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+ i2s-controller = <&i2s>;
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+ status = "okay";
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+ };
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+ };
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+};
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--- a/arch/arm/configs/bcm2709_defconfig
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+++ b/arch/arm/configs/bcm2709_defconfig
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@@ -863,6 +863,7 @@ CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
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CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI=m
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CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
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CONFIG_SND_BCM2708_SOC_RASPIDAC3=m
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+CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m
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CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
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CONFIG_SND_SOC_ADAU1701=m
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CONFIG_SND_SOC_WM8804_I2C=m
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--- a/arch/arm/configs/bcmrpi_defconfig
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+++ b/arch/arm/configs/bcmrpi_defconfig
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@@ -855,6 +855,7 @@ CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
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CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI=m
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CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
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CONFIG_SND_BCM2708_SOC_RASPIDAC3=m
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+CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m
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CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
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CONFIG_SND_SOC_ADAU1701=m
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CONFIG_SND_SOC_WM8804_I2C=m
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--- a/sound/soc/bcm/Kconfig
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+++ b/sound/soc/bcm/Kconfig
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@@ -85,3 +85,10 @@ config SND_BCM2708_SOC_ADAU1977_ADC
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select SND_SOC_ADAU1977_I2C
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help
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Say Y or M if you want to add support for ADAU1977 ADC.
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+
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+config SND_AUDIOINJECTOR_PI_SOUNDCARD
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+ tristate "Support for audioinjector.net Pi add on soundcard"
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+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
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+ select SND_SOC_WM8731
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+ help
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+ Say Y or M if you want to add support for audioinjector.net Pi Hat
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--- a/sound/soc/bcm/Makefile
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+++ b/sound/soc/bcm/Makefile
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@@ -15,6 +15,7 @@ snd-soc-rpi-dac-objs := rpi-dac.o
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snd-soc-rpi-proto-objs := rpi-proto.o
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snd-soc-iqaudio-dac-objs := iqaudio-dac.o
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snd-soc-raspidac3-objs := raspidac3.o
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+snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
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obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o
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obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
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@@ -27,3 +28,5 @@ obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) +=
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obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
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obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
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obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) += snd-soc-raspidac3.o
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+obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
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+
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--- /dev/null
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+++ b/sound/soc/bcm/audioinjector-pi-soundcard.c
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@@ -0,0 +1,142 @@
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+/*
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+ * ASoC Driver for AudioInjector Pi add on soundcard
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+ *
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+ * Created on: 13-May-2016
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+ * Author: flatmax@flatmax.org
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+ * based on code by Cliff Cai <Cliff.Cai@analog.com> for the ssm2602 machine blackfin.
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+ * with help from Lars-Peter Clausen for simplifying the original code to use the dai_fmt field.
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+ * i2s_node code taken from the other sound/soc/bcm machine drivers.
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+ *
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+ * Copyright (C) 2016 Flatmax Pty. Ltd.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/types.h>
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+
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+#include <sound/core.h>
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+#include <sound/soc.h>
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+#include <sound/pcm_params.h>
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+#include <sound/control.h>
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+
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+#include "../codecs/wm8731.h"
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+
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+static int audioinjector_pi_soundcard_dai_init(struct snd_soc_pcm_runtime *rtd)
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+{
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+ struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
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+
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+ // not connected
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+ snd_soc_dapm_nc_pin(dapm, "Mic Bias");
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+ snd_soc_dapm_nc_pin(dapm, "MICIN");
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+ snd_soc_dapm_nc_pin(dapm, "RHPOUT");
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+ snd_soc_dapm_nc_pin(dapm, "LHPOUT");
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+
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+ return snd_soc_dai_set_sysclk(rtd->codec_dai, WM8731_SYSCLK_XTAL, 12000000, SND_SOC_CLOCK_IN);
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+}
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+
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+static struct snd_soc_dai_link audioinjector_pi_soundcard_dai[] = {
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+ {
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+ .name = "AudioInjector audio",
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+ .stream_name = "AudioInjector audio",
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+ .cpu_dai_name = "bcm2708-i2s.0",
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+ .codec_dai_name = "wm8731-hifi",
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+ .platform_name = "bcm2835-i2s.0",
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+ .codec_name = "wm8731.1-001a",
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+ .init = audioinjector_pi_soundcard_dai_init,
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+ .dai_fmt = SND_SOC_DAIFMT_CBM_CFM|SND_SOC_DAIFMT_I2S|SND_SOC_DAIFMT_NB_NF,
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+ },
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+};
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+
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+static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
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+ SND_SOC_DAPM_SPK("Ext Spk", NULL),
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+ SND_SOC_DAPM_LINE("Line In Jacks", NULL),
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+};
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+
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+/* Corgi machine connections to the codec pins */
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+static const struct snd_soc_dapm_route audioinjector_audio_map[] = {
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+ /* speaker connected to LOUT, ROUT */
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+ {"Ext Spk", NULL, "ROUT"},
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+ {"Ext Spk", NULL, "LOUT"},
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+
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+ /* line inputs */
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+ {"Line In Jacks", NULL, "Line Input"},
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+};
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+
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+static struct snd_soc_card snd_soc_audioinjector = {
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+ .name = "audioinjector-pi-soundcard",
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+ .dai_link = audioinjector_pi_soundcard_dai,
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+ .num_links = 1,
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+
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+ .dapm_widgets = wm8731_dapm_widgets,
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+ .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
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+ .dapm_routes = audioinjector_audio_map,
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+ .num_dapm_routes = ARRAY_SIZE(audioinjector_audio_map),
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+};
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+
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+static int audioinjector_pi_soundcard_probe(struct platform_device *pdev)
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+{
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+ struct snd_soc_card *card = &snd_soc_audioinjector;
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+ int ret;
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+
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+ card->dev = &pdev->dev;
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+
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+ if (pdev->dev.of_node) {
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+ struct snd_soc_dai_link *dai = &audioinjector_pi_soundcard_dai[0];
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+ struct device_node *i2s_node = of_parse_phandle(pdev->dev.of_node,
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+ "i2s-controller", 0);
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+
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+ if (i2s_node) {
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+ dai->cpu_dai_name = NULL;
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+ dai->cpu_of_node = i2s_node;
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+ dai->platform_name = NULL;
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+ dai->platform_of_node = i2s_node;
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+ } else
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+ if (!dai->cpu_of_node) {
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+ dev_err(&pdev->dev, "Property 'i2s-controller' missing or invalid\n");
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+ return -EINVAL;
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+ }
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+ }
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+
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+ if ((ret = snd_soc_register_card(card))) {
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+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
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+ }
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+ return ret;
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+}
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+
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+static int audioinjector_pi_soundcard_remove(struct platform_device *pdev)
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+{
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+ struct snd_soc_card *card = platform_get_drvdata(pdev);
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+ return snd_soc_unregister_card(card);
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+
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+}
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+
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+static const struct of_device_id audioinjector_pi_soundcard_of_match[] = {
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+ { .compatible = "ai,audioinjector-pi-soundcard", },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, audioinjector_pi_soundcard_of_match);
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+
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+static struct platform_driver audioinjector_pi_soundcard_driver = {
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+ .driver = {
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+ .name = "audioinjector-audio",
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+ .owner = THIS_MODULE,
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+ .of_match_table = audioinjector_pi_soundcard_of_match,
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+ },
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+ .probe = audioinjector_pi_soundcard_probe,
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+ .remove = audioinjector_pi_soundcard_remove,
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+};
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+
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+module_platform_driver(audioinjector_pi_soundcard_driver);
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+MODULE_AUTHOR("Matt Flax <flatmax@flatmax.org>");
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+MODULE_DESCRIPTION("AudioInjector.net Pi Soundcard");
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+MODULE_LICENSE("GPL v2");
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+MODULE_ALIAS("platform:audioinjector-pi-soundcard");
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+
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