diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0507-Allo-Piano-DAC-boards-Initial-2-channel-stereo-suppo.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0507-Allo-Piano-DAC-boards-Initial-2-channel-stereo-suppo.patch | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0507-Allo-Piano-DAC-boards-Initial-2-channel-stereo-suppo.patch b/target/linux/brcm2708/patches-4.4/0507-Allo-Piano-DAC-boards-Initial-2-channel-stereo-suppo.patch new file mode 100644 index 0000000000..16a9b0773b --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0507-Allo-Piano-DAC-boards-Initial-2-channel-stereo-suppo.patch @@ -0,0 +1,324 @@ +From 655114c25214675520d742f5e86cdd8dd534e6c7 Mon Sep 17 00:00:00 2001 +From: Clive Messer <clive.m.messer@gmail.com> +Date: Mon, 19 Sep 2016 14:01:04 +0100 +Subject: [PATCH] Allo Piano DAC boards: Initial 2 channel (stereo) support + (#1645) + +Add initial 2 channel (stereo) support for Allo Piano DAC (2.0/2.1) boards, +using allo-piano-dac-pcm512x-audio overlay and allo-piano-dac ALSA ASoC +machine driver. + +NB. The initial support is 2 channel (stereo) ONLY! +(The Piano DAC 2.1 will only support 2 channel (stereo) left/right output, + pending an update to the upstream pcm512x codec driver, which will have + to be submitted via upstream. With the initial downstream support, + provided by this patch, the Piano DAC 2.1 subwoofer outputs will + not function.) + +Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net> +Signed-off-by: Clive Messer <clive.messer@digitaldreamtime.co.uk> +Tested-by: Clive Messer <clive.messer@digitaldreamtime.co.uk> +--- + arch/arm/boot/dts/overlays/Makefile | 1 + + arch/arm/boot/dts/overlays/README | 20 +++ + .../allo-piano-dac-pcm512x-audio-overlay.dts | 54 ++++++++ + 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/allo-piano-dac.c | 144 +++++++++++++++++++++ + 8 files changed, 230 insertions(+) + create mode 100644 arch/arm/boot/dts/overlays/allo-piano-dac-pcm512x-audio-overlay.dts + create mode 100644 sound/soc/bcm/allo-piano-dac.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) += ads1015.dtbo + dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo + dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo ++dtbo-$(RPI_DT_OVERLAYS) += allo-piano-dac-pcm512x-audio.dtbo + dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo + dtbo-$(RPI_DT_OVERLAYS) += audioinjector-wm8731-audio.dtbo + dtbo-$(RPI_DT_OVERLAYS) += audremap.dtbo +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -235,6 +235,26 @@ Params: 24db_digital_gain Allow ga + that does not result in clipping/distortion!) + + ++Name: allo-piano-dac-pcm512x-audio ++Info: Configures the Allo Piano DAC (2.0/2.1) audio cards. ++ (NB. This initial support is for 2.0 channel audio ONLY! ie. stereo. ++ The subwoofer outputs on the Piano 2.1 are not currently supported!) ++Load: dtoverlay=allo-piano-dac-pcm512x-audio,<param> ++Params: 24db_digital_gain Allow gain to be applied via the PCM512x codec ++ Digital volume control. ++ (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: at86rf233 + Info: Configures the Atmel AT86RF233 802.15.4 low-power WPAN transceiver, + connected to spi0.0 +--- /dev/null ++++ b/arch/arm/boot/dts/overlays/allo-piano-dac-pcm512x-audio-overlay.dts +@@ -0,0 +1,54 @@ ++/* ++ * Definitions for Allo Piano DAC (2.0/2.1) boards ++ * ++ * NB. The Piano DAC 2.1 board contains 2x TI PCM5142 DAC's. One DAC is stereo ++ * (left/right) and the other provides a subwoofer output, using DSP on the ++ * chip for digital high/low pass crossover. ++ * The initial support for this hardware, that doesn't require any codec driver ++ * modifications, uses only one DAC chip for stereo (left/right) output, the ++ * chip with 0x4c slave address. The other chip at 0x4d is currently ignored! ++ */ ++ ++/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"; ++ ++ pcm5142@4c { ++ #sound-dai-cells = <0>; ++ compatible = "ti,pcm5142"; ++ reg = <0x4c>; ++ status = "okay"; ++ }; ++ }; ++ }; ++ ++ fragment@2 { ++ target = <&sound>; ++ piano_dac: __overlay__ { ++ compatible = "allo,piano-dac"; ++ i2s-controller = <&i2s>; ++ status = "okay"; ++ }; ++ }; ++ ++ __overrides__ { ++ 24db_digital_gain = ++ <&piano_dac>,"allo,24db_digital_gain?"; ++ }; ++}; +--- a/arch/arm/configs/bcm2709_defconfig ++++ b/arch/arm/configs/bcm2709_defconfig +@@ -879,6 +879,7 @@ 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_ALLO_PIANO_DAC=m + CONFIG_SND_SOC_ADAU1701=m + CONFIG_SND_SOC_WM8804_I2C=m + CONFIG_SND_SIMPLE_CARD=m +--- a/arch/arm/configs/bcmrpi_defconfig ++++ b/arch/arm/configs/bcmrpi_defconfig +@@ -871,6 +871,7 @@ 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_ALLO_PIANO_DAC=m + CONFIG_SND_SOC_ADAU1701=m + CONFIG_SND_SOC_WM8804_I2C=m + CONFIG_SND_SIMPLE_CARD=m +--- a/sound/soc/bcm/Kconfig ++++ b/sound/soc/bcm/Kconfig +@@ -114,3 +114,10 @@ config SND_BCM2708_SOC_DIONAUDIO_LOCO + select SND_SOC_PCM5102a + help + Say Y or M if you want to add support for Dion Audio LOCO. ++ ++config SND_BCM2708_SOC_ALLO_PIANO_DAC ++ tristate "Support for Allo Piano DAC" ++ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S ++ select SND_SOC_PCM512x_I2C ++ help ++ Say Y or M if you want to add support for Allo Piano DAC. +--- a/sound/soc/bcm/Makefile ++++ b/sound/soc/bcm/Makefile +@@ -19,6 +19,7 @@ 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-allo-piano-dac-objs := allo-piano-dac.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 +@@ -35,3 +36,4 @@ 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_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o +--- /dev/null ++++ b/sound/soc/bcm/allo-piano-dac.c +@@ -0,0 +1,144 @@ ++/* ++ * ALSA ASoC Machine Driver for Allo Piano DAC ++ * ++ * Author: Baswaraj K <jaikumar@cem-solutions.net> ++ * Copyright 2016 ++ * based on code by Daniel Matuschek <info@crazy-audio.com> ++ * based on code by Florian Meier <florian.meier@koalo.de> ++ * ++ * 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> ++ ++static bool digital_gain_0db_limit = true; ++ ++static int snd_allo_piano_dac_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_allo_piano_dac_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_allo_piano_dac_ops = { ++ .hw_params = snd_allo_piano_dac_hw_params, ++}; ++ ++static struct snd_soc_dai_link snd_allo_piano_dac_dai[] = { ++{ ++ .name = "Piano DAC", ++ .stream_name = "Piano DAC HiFi", ++ .cpu_dai_name = "bcm2708-i2s.0", ++ .codec_dai_name = "pcm512x-hifi", ++ .platform_name = "bcm2708-i2s.0", ++ .codec_name = "pcm512x.1-004c", ++ .dai_fmt = SND_SOC_DAIFMT_I2S | ++ SND_SOC_DAIFMT_NB_NF | ++ SND_SOC_DAIFMT_CBS_CFS, ++ .ops = &snd_allo_piano_dac_ops, ++ .init = snd_allo_piano_dac_init, ++}, ++}; ++ ++/* audio machine driver */ ++static struct snd_soc_card snd_allo_piano_dac = { ++ .name = "PianoDAC", ++ .owner = THIS_MODULE, ++ .dai_link = snd_allo_piano_dac_dai, ++ .num_links = ARRAY_SIZE(snd_allo_piano_dac_dai), ++}; ++ ++static int snd_allo_piano_dac_probe(struct platform_device *pdev) ++{ ++ int ret = 0; ++ ++ snd_allo_piano_dac.dev = &pdev->dev; ++ ++ if (pdev->dev.of_node) { ++ struct device_node *i2s_node; ++ struct snd_soc_dai_link *dai; ++ ++ dai = &snd_allo_piano_dac_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, "allo,24db_digital_gain"); ++ } ++ ++ ret = snd_soc_register_card(&snd_allo_piano_dac); ++ if (ret) ++ dev_err(&pdev->dev, ++ "snd_soc_register_card() failed: %d\n", ret); ++ ++ return ret; ++} ++ ++static int snd_allo_piano_dac_remove(struct platform_device *pdev) ++{ ++ return snd_soc_unregister_card(&snd_allo_piano_dac); ++} ++ ++static const struct of_device_id snd_allo_piano_dac_of_match[] = { ++ { .compatible = "allo,piano-dac", }, ++ { /* sentinel */ }, ++}; ++MODULE_DEVICE_TABLE(of, snd_allo_piano_dac_of_match); ++ ++static struct platform_driver snd_allo_piano_dac_driver = { ++ .driver = { ++ .name = "snd-allo-piano-dac", ++ .owner = THIS_MODULE, ++ .of_match_table = snd_allo_piano_dac_of_match, ++ }, ++ .probe = snd_allo_piano_dac_probe, ++ .remove = snd_allo_piano_dac_remove, ++}; ++ ++module_platform_driver(snd_allo_piano_dac_driver); ++ ++MODULE_AUTHOR("Baswaraj K <jaikumar@cem-solutions.net>"); ++MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Piano DAC"); ++MODULE_LICENSE("GPL v2"); |