From a20dbe4972ea3df27f24c5397102e1346462a4f4 Mon Sep 17 00:00:00 2001 From: Miquel Date: Fri, 24 Feb 2017 20:51:06 +0100 Subject: [PATCH] sound: Support for Dion Audio LOCO-V2 DAC-AMP HAT Signed-off-by: Miquel Blauw --- arch/arm/boot/dts/overlays/Makefile | 1 + arch/arm/boot/dts/overlays/README | 19 +++++ 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/dionaudio_loco-v2.c | 140 ++++++++++++++++++++++++++++++++++++ 7 files changed, 171 insertions(+) create mode 100644 sound/soc/bcm/dionaudio_loco-v2.c --- a/arch/arm/boot/dts/overlays/Makefile +++ b/arch/arm/boot/dts/overlays/Makefile @@ -13,6 +13,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \ bmp085_i2c-sensor.dtbo \ dht11.dtbo \ dionaudio-loco.dtbo \ + dionaudio-loco-v2.dtbo \ dpi18.dtbo \ dpi24.dtbo \ dwc-otg.dtbo \ --- a/arch/arm/boot/dts/overlays/README +++ b/arch/arm/boot/dts/overlays/README @@ -308,6 +308,25 @@ Load: dtoverlay=dionaudio-loco Params: +Name: dionaudio-loco-v2 +Info: Configures the Dion Audio LOCO-V2 DAC-AMP +Load: dtoverlay=dionaudio-loco-v2,= +Params: 24db_digital_gain Allow gain to be applied via the PCM512x codec + Digital volume control. Enable with + "dtoverlay=hifiberry-dacplus,24db_digital_gain" + (The default behaviour is that the Digital + volume control is limited to a maximum of + 0dB. ie. it can attenuate but not provide + gain. For most users, this will be desired + as it will prevent clipping. By appending + the 24dB_digital_gain parameter, the Digital + volume control will allow up to 24dB of + gain. If this parameter is enabled, it is the + responsibility of the user to ensure that + the Digital volume control is set to a value + that does not result in clipping/distortion!) + + Name: dpi18 Info: Overlay for a generic 18-bit DPI display This uses GPIOs 0-21 (so no I2C, uart etc.), and activates the output --- a/arch/arm/configs/bcm2709_defconfig +++ b/arch/arm/configs/bcm2709_defconfig @@ -889,6 +889,7 @@ CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m 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_PISOUND=m CONFIG_SND_SOC_ADAU1701=m --- a/arch/arm/configs/bcmrpi_defconfig +++ b/arch/arm/configs/bcmrpi_defconfig @@ -883,6 +883,7 @@ CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m 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_PISOUND=m CONFIG_SND_SOC_ADAU1701=m --- a/sound/soc/bcm/Kconfig +++ b/sound/soc/bcm/Kconfig @@ -133,6 +133,13 @@ config SND_BCM2708_SOC_DIONAUDIO_LOCO help Say Y or M if you want to add support for Dion Audio LOCO. +config SND_BCM2708_SOC_DIONAUDIO_LOCO_V2 + tristate "Support for Dion Audio LOCO-V2 DAC-AMP" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S + select SND_SOC_PCM5122 + help + Say Y or M if you want to add support for Dion Audio LOCO-V2. + config SND_BCM2708_SOC_ALLO_PIANO_DAC tristate "Support for Allo Piano DAC" depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S --- a/sound/soc/bcm/Makefile +++ b/sound/soc/bcm/Makefile @@ -25,6 +25,7 @@ snd-soc-raspidac3-objs := raspidac3.o snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o snd-soc-dionaudio-loco-objs := dionaudio_loco.o +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 @@ -44,5 +45,6 @@ obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o +obj-$(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 --- /dev/null +++ b/sound/soc/bcm/dionaudio_loco-v2.c @@ -0,0 +1,140 @@ +/* + * ASoC Driver for Dion Audio LOCO-V2 DAC-AMP + * + * Author: Miquel Blauw + * Copyright 2017 + * + * Based on the software of the RPi-DAC writen by Florian Meier + * + * 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 + +static bool digital_gain_0db_limit = true; + +static int snd_rpi_dionaudio_loco_v2_init(struct snd_soc_pcm_runtime *rtd) +{ + if (digital_gain_0db_limit) { + int ret; + struct snd_soc_card *card = rtd->card; + + ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207); + if (ret < 0) + dev_warn(card->dev, "Failed to set volume limit: %d\n", ret); + } + + return 0; +} + +static int snd_rpi_dionaudio_loco_v2_hw_params( + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + + unsigned int sample_bits = + snd_pcm_format_physical_width(params_format(params)); + + return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2); +} + +/* machine stream operations */ +static struct snd_soc_ops snd_rpi_dionaudio_loco_v2_ops = { + .hw_params = snd_rpi_dionaudio_loco_v2_hw_params, +}; + +static struct snd_soc_dai_link snd_rpi_dionaudio_loco_v2_dai[] = { +{ + .name = "DionAudio LOCO-V2", + .stream_name = "DionAudio LOCO-V2 DAC-AMP", + .cpu_dai_name = "bcm2708-i2s.0", + .codec_dai_name = "pcm512x-hifi", + .platform_name = "bcm2708-i2s.0", + .codec_name = "pcm512x.1-004d", + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS, + .ops = &snd_rpi_dionaudio_loco_v2_ops, + .init = snd_rpi_dionaudio_loco_v2_init, +},}; + +/* audio machine driver */ +static struct snd_soc_card snd_rpi_dionaudio_loco_v2 = { + .name = "Dion Audio LOCO-V2", + .dai_link = snd_rpi_dionaudio_loco_v2_dai, + .num_links = ARRAY_SIZE(snd_rpi_dionaudio_loco_v2_dai), +}; + +static int snd_rpi_dionaudio_loco_v2_probe(struct platform_device *pdev) +{ + int ret = 0; + + snd_rpi_dionaudio_loco_v2.dev = &pdev->dev; + + if (pdev->dev.of_node) { + struct device_node *i2s_node; + struct snd_soc_dai_link *dai = + &snd_rpi_dionaudio_loco_v2_dai[0]; + + 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; + } + + digital_gain_0db_limit = !of_property_read_bool( + pdev->dev.of_node, "dionaudio,24db_digital_gain"); + } + + ret = snd_soc_register_card(&snd_rpi_dionaudio_loco_v2); + if (ret) + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", + ret); + + return ret; +} + +static int snd_rpi_dionaudio_loco_v2_remove(struct platform_device *pdev) +{ + return snd_soc_unregister_card(&snd_rpi_dionaudio_loco_v2); +} + +static const struct of_device_id dionaudio_of_match[] = { + { .compatible = "dionaudio,dionaudio-loco-v2", }, + {}, +}; +MODULE_DEVICE_TABLE(of, dionaudio_of_match); + +static struct platform_driver snd_rpi_dionaudio_loco_v2_driver = { + .driver = { + .name = "snd-rpi-dionaudio-loco-v2", + .owner = THIS_MODULE, + .of_match_table = dionaudio_of_match, + }, + .probe = snd_rpi_dionaudio_loco_v2_probe, + .remove = snd_rpi_dionaudio_loco_v2_remove, +}; + +module_platform_driver(snd_rpi_dionaudio_loco_v2_driver); + +MODULE_AUTHOR("Miquel Blauw "); +MODULE_DESCRIPTION("ASoC Driver for DionAudio LOCO-V2"); +MODULE_LICENSE("GPL v2");