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openwrt/target/linux/bcm27xx/patches-5.4/950-0364-Allow-simultaneous...

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From eecd29a4a5ede49427e48ea27e372b96d11f3d04 Mon Sep 17 00:00:00 2001
From: Johannes Krude <johannes@krude.de>
Date: Sat, 16 Nov 2019 13:14:43 +0100
Subject: [PATCH] Allow simultaneous use of JustBoom DAC and Digi
Signed-off-by: Johannes Krude <johannes@krude.de>
---
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<n>-<m> Enables
on SPI<n>, CS#<m>.
+Name: justboom-both
+Info: Simultaneous usage of an justboom-dac and justboom-digi based
+ card
+Load: dtoverlay=justboom-both,<param>=<val>
+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 <johannes@krude.de
+ *
+ * Driver for when connecting simultaneously justboom-digi and justboom-dac
+ *
+ * Based upon code from:
+ * justboom-digi.c
+ * by Milan Neskovic <info@justboom.co>
+ * justboom-dac.c
+ * by Milan Neskovic <info@justboom.co>
+ *
+ * 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/platform_device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+
+#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 <johannes@krude.de>");
+MODULE_DESCRIPTION("ASoC Driver for simultaneous use of JustBoom PI Digi & DAC HAT Sound Cards");
+MODULE_LICENSE("GPL v2");
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