diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0349-New-AudioInjector.net-Pi-soundcard-with-low-jitter-a.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0349-New-AudioInjector.net-Pi-soundcard-with-low-jitter-a.patch | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0349-New-AudioInjector.net-Pi-soundcard-with-low-jitter-a.patch b/target/linux/brcm2708/patches-4.4/0349-New-AudioInjector.net-Pi-soundcard-with-low-jitter-a.patch new file mode 100644 index 0000000000..c29bd86667 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0349-New-AudioInjector.net-Pi-soundcard-with-low-jitter-a.patch @@ -0,0 +1,284 @@ +From ae776ef7eb34d99945aadbaa607e1aec66fd04d0 Mon Sep 17 00:00:00 2001 +From: Matt Flax <flatmax@flatmax.org> +Date: Mon, 16 May 2016 21:36:31 +1000 +Subject: [PATCH] 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"); ++ |