From eecd29a4a5ede49427e48ea27e372b96d11f3d04 Mon Sep 17 00:00:00 2001 From: Johannes Krude Date: Sat, 16 Nov 2019 13:14:43 +0100 Subject: [PATCH] Allow simultaneous use of JustBoom DAC and Digi Signed-off-by: Johannes Krude --- arch/arm/boot/dts/overlays/Makefile | 1 + arch/arm/boot/dts/overlays/README | 20 ++ .../dts/overlays/justboom-both-overlay.dts | 65 +++++ sound/soc/bcm/Kconfig | 12 + sound/soc/bcm/Makefile | 2 + sound/soc/bcm/justboom-both.c | 266 ++++++++++++++++++ 11 files changed, 371 insertions(+) create mode 100644 arch/arm/boot/dts/overlays/justboom-both-overlay.dts create mode 100644 sound/soc/bcm/justboom-both.c --- a/arch/arm/boot/dts/overlays/Makefile +++ b/arch/arm/boot/dts/overlays/Makefile @@ -86,6 +86,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \ iqaudio-digi-wm8804-audio.dtbo \ irs1125.dtbo \ jedec-spi-nor.dtbo \ + justboom-both.dtbo \ justboom-dac.dtbo \ justboom-digi.dtbo \ ltc294x.dtbo \ --- a/arch/arm/boot/dts/overlays/README +++ b/arch/arm/boot/dts/overlays/README @@ -1388,6 +1388,26 @@ Params: flash-spi- Enables on SPI, CS#. +Name: justboom-both +Info: Simultaneous usage of an justboom-dac and justboom-digi based + card +Load: dtoverlay=justboom-both,= +Params: 24db_digital_gain Allow gain to be applied via the PCM512x codec + Digital volume control. Enable with + "dtoverlay=justboom-dac,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: justboom-dac Info: Configures the JustBoom DAC HAT, Amp HAT, DAC Zero and Amp Zero audio cards --- /dev/null +++ b/arch/arm/boot/dts/overlays/justboom-both-overlay.dts @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0 +// Definitions for JustBoom Both (Digi+DAC) +/dts-v1/; +/plugin/; + +/ { + compatible = "brcm,bcm2835"; + + fragment@0 { + target = <&i2s>; + __overlay__ { + status = "okay"; + }; + }; + + fragment@1 { + target = <&i2c1>; + __overlay__ { + #address-cells = <1>; + #size-cells = <0>; + status = "okay"; + + wm8804@3b { + #sound-dai-cells = <0>; + compatible = "wlf,wm8804"; + reg = <0x3b>; + PVDD-supply = <&vdd_3v3_reg>; + DVDD-supply = <&vdd_3v3_reg>; + status = "okay"; + }; + }; + }; + + fragment@2 { + target = <&i2c1>; + __overlay__ { + #address-cells = <1>; + #size-cells = <0>; + status = "okay"; + + pcm5122@4d { + #sound-dai-cells = <0>; + compatible = "ti,pcm5122"; + reg = <0x4d>; + AVDD-supply = <&vdd_3v3_reg>; + DVDD-supply = <&vdd_3v3_reg>; + CPVDD-supply = <&vdd_3v3_reg>; + status = "okay"; + }; + }; + }; + + fragment@3 { + target = <&sound>; + frag3: __overlay__ { + compatible = "justboom,justboom-both"; + i2s-controller = <&i2s>; + status = "okay"; + }; + }; + + __overrides__ { + 24db_digital_gain = <&frag3>,"justboom,24db_digital_gain?"; + }; +}; --- a/sound/soc/bcm/Kconfig +++ b/sound/soc/bcm/Kconfig @@ -105,6 +105,18 @@ config SND_BCM2708_SOC_RPI_PROTO help Say Y or M if you want to add support for Audio Codec Board PROTO (WM8731). +config SND_BCM2708_SOC_JUSTBOOM_BOTH + tristate "Support for simultaneous JustBoom Digi and JustBoom DAC" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S + select SND_SOC_WM8804 + select SND_SOC_PCM512x + help + Say Y or M if you want to add support for simultaneous + JustBoom Digi and JustBoom DAC. + + This is not the right choice if you only have one but both of + these cards. + config SND_BCM2708_SOC_JUSTBOOM_DAC tristate "Support for JustBoom DAC" depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S --- a/sound/soc/bcm/Makefile +++ b/sound/soc/bcm/Makefile @@ -17,6 +17,7 @@ snd-soc-hifiberry-dacplus-objs := hifibe snd-soc-hifiberry-dacplusadc-objs := hifiberry_dacplusadc.o snd-soc-hifiberry-dacplusadcpro-objs := hifiberry_dacplusadcpro.o snd-soc-hifiberry-dacplusdsp-objs := hifiberry_dacplusdsp.o +snd-soc-justboom-both-objs := justboom-both.o snd-soc-justboom-dac-objs := justboom-dac.o snd-soc-rpi-cirrus-objs := rpi-cirrus.o snd-soc-rpi-proto-objs := rpi-proto.o @@ -43,6 +44,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_D obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC) += snd-soc-hifiberry-dacplusadc.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADCPRO) += snd-soc-hifiberry-dacplusadcpro.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSDSP) += snd-soc-hifiberry-dacplusdsp.o +obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_BOTH) += snd-soc-justboom-both.o obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_DAC) += snd-soc-justboom-dac.o obj-$(CONFIG_SND_BCM2708_SOC_RPI_CIRRUS) += snd-soc-rpi-cirrus.o obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o --- /dev/null +++ b/sound/soc/bcm/justboom-both.c @@ -0,0 +1,266 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * rpi--wm8804.c -- ALSA SoC Raspberry Pi soundcard. + * + * Authors: Johannes Krude + * justboom-dac.c + * by Milan Neskovic + * + * 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 "../codecs/wm8804.h" +#include "../codecs/pcm512x.h" + + +static bool digital_gain_0db_limit = true; + +static int snd_rpi_justboom_both_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_component *digi = rtd->codec_dais[0]->component; + struct snd_soc_component *dac = rtd->codec_dais[1]->component; + + /* enable TX output */ + snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x4, 0x0); + + snd_soc_component_update_bits(dac, PCM512x_GPIO_EN, 0x08, 0x08); + snd_soc_component_update_bits(dac, PCM512x_GPIO_OUTPUT_4, 0xf, 0x02); + snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x08); + + 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_justboom_both_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 *codec_dai = rtd->codec_dai; + struct snd_soc_component *digi = rtd->codec_dais[0]->component; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + + int sysclk = 27000000; /* This is fixed on this board */ + + long mclk_freq = 0; + int mclk_div = 1; + int sampling_freq = 1; + + int ret; + + int samplerate = params_rate(params); + + if (samplerate <= 96000) { + mclk_freq = samplerate*256; + mclk_div = WM8804_MCLKDIV_256FS; + } else { + mclk_freq = samplerate*128; + mclk_div = WM8804_MCLKDIV_128FS; + } + + switch (samplerate) { + case 32000: + sampling_freq = 0x03; + break; + case 44100: + sampling_freq = 0x00; + break; + case 48000: + sampling_freq = 0x02; + break; + case 88200: + sampling_freq = 0x08; + break; + case 96000: + sampling_freq = 0x0a; + break; + case 176400: + sampling_freq = 0x0c; + break; + case 192000: + sampling_freq = 0x0e; + break; + default: + dev_err(rtd->card->dev, + "Failed to set WM8804 SYSCLK, unsupported samplerate %d\n", + samplerate); + } + + snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div); + snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq); + + ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL, + sysclk, SND_SOC_CLOCK_OUT); + if (ret < 0) { + dev_err(rtd->card->dev, + "Failed to set WM8804 SYSCLK: %d\n", ret); + return ret; + } + + /* Enable TX output */ + snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x4, 0x0); + + /* Power on */ + snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x9, 0); + + /* set sampling frequency status bits */ + snd_soc_component_update_bits(digi, WM8804_SPDTX4, 0x0f, sampling_freq); + + return snd_soc_dai_set_bclk_ratio(cpu_dai, 64); +} + +static int snd_rpi_justboom_both_startup(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_component *digi = rtd->codec_dais[0]->component; + struct snd_soc_component *dac = rtd->codec_dais[1]->component; + + /* turn on digital output */ + snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x3c, 0x00); + + snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x08); + + return 0; +} + +static void snd_rpi_justboom_both_shutdown(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_component *digi = rtd->codec_dais[0]->component; + struct snd_soc_component *dac = rtd->codec_dais[1]->component; + + snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x00); + + /* turn off output */ + snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x3c, 0x3c); +} + +/* machine stream operations */ +static struct snd_soc_ops snd_rpi_justboom_both_ops = { + .hw_params = snd_rpi_justboom_both_hw_params, + .startup = snd_rpi_justboom_both_startup, + .shutdown = snd_rpi_justboom_both_shutdown, +}; + +SND_SOC_DAILINK_DEFS(rpi_justboom_both, + DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), + DAILINK_COMP_ARRAY(COMP_CODEC("pcm512x.1-004d", "pcm512x-hifi"), + COMP_CODEC("wm8804.1-003b", "wm8804-spdif")), + DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0"))); + +static struct snd_soc_dai_link snd_rpi_justboom_both_dai[] = { +{ + .name = "JustBoom Digi", + .stream_name = "JustBoom Digi HiFi", + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM, + .ops = &snd_rpi_justboom_both_ops, + .init = snd_rpi_justboom_both_init, + SND_SOC_DAILINK_REG(rpi_justboom_both), +}, +}; + +/* audio machine driver */ +static struct snd_soc_card snd_rpi_justboom_both = { + .name = "snd_rpi_justboom_both", + .driver_name = "JustBoomBoth", + .owner = THIS_MODULE, + .dai_link = snd_rpi_justboom_both_dai, + .num_links = ARRAY_SIZE(snd_rpi_justboom_both_dai), +}; + +static int snd_rpi_justboom_both_probe(struct platform_device *pdev) +{ + int ret = 0; + struct snd_soc_card *card = &snd_rpi_justboom_both; + + snd_rpi_justboom_both.dev = &pdev->dev; + + if (pdev->dev.of_node) { + struct device_node *i2s_node; + struct snd_soc_dai_link *dai = &snd_rpi_justboom_both_dai[0]; + + i2s_node = of_parse_phandle(pdev->dev.of_node, + "i2s-controller", 0); + + if (i2s_node) { + int i; + + for (i = 0; i < card->num_links; i++) { + dai->cpus->dai_name = NULL; + dai->cpus->of_node = i2s_node; + dai->platforms->name = NULL; + dai->platforms->of_node = i2s_node; + } + } + + digital_gain_0db_limit = !of_property_read_bool( + pdev->dev.of_node, "justboom,24db_digital_gain"); + } + + 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_rpi_justboom_both_remove(struct platform_device *pdev) +{ + return snd_soc_unregister_card(&snd_rpi_justboom_both); +} + +static const struct of_device_id snd_rpi_justboom_both_of_match[] = { + { .compatible = "justboom,justboom-both", }, + {}, +}; +MODULE_DEVICE_TABLE(of, snd_rpi_justboom_both_of_match); + +static struct platform_driver snd_rpi_justboom_both_driver = { + .driver = { + .name = "snd-rpi-justboom-both", + .owner = THIS_MODULE, + .of_match_table = snd_rpi_justboom_both_of_match, + }, + .probe = snd_rpi_justboom_both_probe, + .remove = snd_rpi_justboom_both_remove, +}; + +module_platform_driver(snd_rpi_justboom_both_driver); + +MODULE_AUTHOR("Johannes Krude "); +MODULE_DESCRIPTION("ASoC Driver for simultaneous use of JustBoom PI Digi & DAC HAT Sound Cards"); +MODULE_LICENSE("GPL v2");