From c646d023c75607a9ebc7296fe424d6eb4e804164 Mon Sep 17 00:00:00 2001 From: Fe-Pi Date: Wed, 1 Mar 2017 04:42:43 -0700 Subject: [PATCH] Add support for Fe-Pi audio sound card. (#1867) Fe-Pi Audio Sound Card is based on NXP SGTL5000 codec. Mechanical specification of the board is the same the Raspberry Pi Zero. 3.5mm jacks for Headphone/Mic, Line In, and Line Out. Signed-off-by: Henry Kupis --- arch/arm/boot/dts/overlays/Makefile | 1 + arch/arm/boot/dts/overlays/README | 6 + arch/arm/boot/dts/overlays/fe-pi-audio-overlay.dts | 70 +++++++++ arch/arm/configs/bcm2709_defconfig | 1 + arch/arm/configs/bcmrpi_defconfig | 1 + sound/soc/bcm/Kconfig | 7 + sound/soc/bcm/Makefile | 2 + sound/soc/bcm/fe-pi-audio.c | 158 +++++++++++++++++++++ 8 files changed, 246 insertions(+) create mode 100644 arch/arm/boot/dts/overlays/fe-pi-audio-overlay.dts create mode 100644 sound/soc/bcm/fe-pi-audio.c --- a/arch/arm/boot/dts/overlays/Makefile +++ b/arch/arm/boot/dts/overlays/Makefile @@ -20,6 +20,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \ dwc2.dtbo \ enc28j60.dtbo \ enc28j60-spi2.dtbo \ + fe-pi-audio.dtbo \ gpio-ir.dtbo \ gpio-poweroff.dtbo \ hifiberry-amp.dtbo \ --- a/arch/arm/boot/dts/overlays/README +++ b/arch/arm/boot/dts/overlays/README @@ -383,6 +383,12 @@ Params: int_pin GPIO use speed SPI bus speed (default 12000000) +Name: fe-pi-audio +Info: Configures the Fe-Pi Audio Sound Card +Load: dtoverlay=fe-pi-audio +Params: + + Name: gpio-ir Info: Use GPIO pin as rc-core style infrared receiver input. The rc-core- based gpio_ir_recv driver maps received keys directly to a --- /dev/null +++ b/arch/arm/boot/dts/overlays/fe-pi-audio-overlay.dts @@ -0,0 +1,70 @@ +// Definitions for Fe-Pi Audio +/dts-v1/; +/plugin/; + +/ { + compatible = "brcm,bcm2708"; + + fragment@0 { + target = <&clocks>; + __overlay__ { + sgtl5000_mclk: sgtl5000_mclk { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <12288000>; + clock-output-names = "sgtl5000-mclk"; + }; + }; + }; + + fragment@1 { + target = <&soc>; + __overlay__ { + reg_1v8: reg_1v8@0 { + compatible = "regulator-fixed"; + regulator-name = "1V8"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + regulator-always-on; + }; + }; + }; + + fragment@2 { + target = <&i2c1>; + __overlay__ { + #address-cells = <1>; + #size-cells = <0>; + status = "okay"; + + sgtl5000@0a { + #sound-dai-cells = <0>; + compatible = "fepi,sgtl5000"; + reg = <0x0a>; + clocks = <&sgtl5000_mclk>; + micbias-resistor-k-ohms = <2>; + micbias-voltage-m-volts = <3000>; + VDDA-supply = <&vdd_3v3_reg>; + VDDIO-supply = <&vdd_3v3_reg>; + VDDD-supply = <®_1v8>; + status = "okay"; + }; + }; + }; + + fragment@3 { + target = <&i2s>; + __overlay__ { + status = "okay"; + }; + }; + + fragment@4 { + target = <&sound>; + __overlay__ { + compatible = "fe-pi,fe-pi-audio"; + i2s-controller = <&i2s>; + status = "okay"; + }; + }; +}; --- a/arch/arm/configs/bcm2709_defconfig +++ b/arch/arm/configs/bcm2709_defconfig @@ -891,6 +891,7 @@ CONFIG_SND_DIGIDAC1_SOUNDCARD=m CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO=m CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2=m CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC=m +CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m CONFIG_SND_PISOUND=m CONFIG_SND_SOC_ADAU1701=m CONFIG_SND_SOC_ADAU7002=m --- a/arch/arm/configs/bcmrpi_defconfig +++ b/arch/arm/configs/bcmrpi_defconfig @@ -885,6 +885,7 @@ CONFIG_SND_DIGIDAC1_SOUNDCARD=m CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO=m CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2=m CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC=m +CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m CONFIG_SND_PISOUND=m CONFIG_SND_SOC_ADAU1701=m CONFIG_SND_SOC_ADAU7002=m --- a/sound/soc/bcm/Kconfig +++ b/sound/soc/bcm/Kconfig @@ -147,6 +147,13 @@ config SND_BCM2708_SOC_ALLO_PIANO_DAC help Say Y or M if you want to add support for Allo Piano DAC. +config SND_BCM2708_SOC_FE_PI_AUDIO + tristate "Support for Fe-Pi-Audio" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S + select SND_SOC_SGTL5000 + help + Say Y or M if you want to add support for Fe-Pi-Audio. + config SND_PISOUND tristate "Support for Blokas Labs pisound" depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S --- a/sound/soc/bcm/Makefile +++ b/sound/soc/bcm/Makefile @@ -28,6 +28,7 @@ snd-soc-dionaudio-loco-objs := dionaudio snd-soc-dionaudio-loco-v2-objs := dionaudio_loco-v2.o snd-soc-allo-piano-dac-objs := allo-piano-dac.o snd-soc-pisound-objs := pisound.o +snd-soc-fe-pi-audio-objs := fe-pi-audio.o obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o @@ -48,3 +49,4 @@ obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_L obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2) += snd-soc-dionaudio-loco-v2.o obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o obj-$(CONFIG_SND_PISOUND) += snd-soc-pisound.o +obj-$(CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO) += snd-soc-fe-pi-audio.o --- /dev/null +++ b/sound/soc/bcm/fe-pi-audio.c @@ -0,0 +1,158 @@ +/* + * ASoC Driver for Fe-Pi Audio Sound Card + * + * Author: Henry Kupis + * Copyright 2016 + * based on code by Florian Meier + * based on code by Shawn Guo + * + * 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 +#include +#include + +#include +#include +#include +#include +#include + +#include "../codecs/sgtl5000.h" + +static int snd_fe_pi_audio_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_card *card = rtd->card; + struct snd_soc_codec *codec = rtd->codec; + + snd_soc_dapm_force_enable_pin(&card->dapm, "LO"); + snd_soc_dapm_force_enable_pin(&card->dapm, "ADC"); + snd_soc_dapm_force_enable_pin(&card->dapm, "DAC"); + snd_soc_dapm_force_enable_pin(&card->dapm, "HP"); + snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER, + SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP); + + return 0; +} + +static int snd_fe_pi_audio_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct device *dev = rtd->card->dev; + struct snd_soc_dai *codec_dai = rtd->codec_dai; + + int ret; + + /* Set SGTL5000's SYSCLK */ + ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, 12288000, SND_SOC_CLOCK_IN); + if (ret) { + dev_err(dev, "could not set codec driver clock params\n"); + return ret; + } + + return 0; +} + + +static struct snd_soc_ops snd_fe_pi_audio_ops = { + .hw_params = snd_fe_pi_audio_hw_params, +}; + +static struct snd_soc_dai_link snd_fe_pi_audio_dai[] = { + { + .name = "FE-PI", + .stream_name = "Fe-Pi HiFi", + .cpu_dai_name = "bcm2708-i2s.0", + .codec_dai_name = "sgtl5000", + .platform_name = "bcm2708-i2s.0", + .codec_name = "sgtl5000.1-000a", + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM, + .ops = &snd_fe_pi_audio_ops, + .init = snd_fe_pi_audio_init, + }, +}; + +static const struct snd_soc_dapm_route fe_pi_audio_dapm_routes[] = { + {"ADC", NULL, "Mic Bias"}, +}; + + +static struct snd_soc_card fe_pi_audio = { + .name = "Fe-Pi Audio", + .owner = THIS_MODULE, + .dai_link = snd_fe_pi_audio_dai, + .num_links = ARRAY_SIZE(snd_fe_pi_audio_dai), + + .dapm_routes = fe_pi_audio_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(fe_pi_audio_dapm_routes), +}; + +static int snd_fe_pi_audio_probe(struct platform_device *pdev) +{ + int ret = 0; + struct snd_soc_card *card = &fe_pi_audio; + struct device_node *np = pdev->dev.of_node; + struct device_node *i2s_node; + struct snd_soc_dai_link *dai = &snd_fe_pi_audio_dai[0]; + + fe_pi_audio.dev = &pdev->dev; + + i2s_node = of_parse_phandle(np, "i2s-controller", 0); + if (!i2s_node) { + dev_err(&pdev->dev, "i2s_node phandle missing or invalid\n"); + return -EINVAL; + } + + dai->cpu_dai_name = NULL; + dai->cpu_of_node = i2s_node; + dai->platform_name = NULL; + dai->platform_of_node = i2s_node; + + of_node_put(i2s_node); + + card->dev = &pdev->dev; + platform_set_drvdata(pdev, card); + + ret = snd_soc_register_card(card); + if (ret && ret != -EPROBE_DEFER) + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret); + + return ret; +} + +static int snd_fe_pi_audio_remove(struct platform_device *pdev) +{ + return snd_soc_unregister_card(&fe_pi_audio); +} + +static const struct of_device_id snd_fe_pi_audio_of_match[] = { + { .compatible = "fe-pi,fe-pi-audio", }, + {}, +}; +MODULE_DEVICE_TABLE(of, snd_fe_pi_audio_of_match); + +static struct platform_driver snd_fe_pi_audio_driver = { + .driver = { + .name = "snd-fe-pi-audio", + .owner = THIS_MODULE, + .of_match_table = snd_fe_pi_audio_of_match, + }, + .probe = snd_fe_pi_audio_probe, + .remove = snd_fe_pi_audio_remove, +}; + +module_platform_driver(snd_fe_pi_audio_driver); + +MODULE_AUTHOR("Henry Kupis "); +MODULE_DESCRIPTION("ASoC Driver for Fe-Pi Audio"); +MODULE_LICENSE("GPL v2");