diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0084-ASoC-Add-generic-RPI-driver-for-simple-soundcards.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0084-ASoC-Add-generic-RPI-driver-for-simple-soundcards.patch | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0084-ASoC-Add-generic-RPI-driver-for-simple-soundcards.patch b/target/linux/bcm27xx/patches-4.19/950-0084-ASoC-Add-generic-RPI-driver-for-simple-soundcards.patch new file mode 100644 index 0000000000..ea2c91164f --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0084-ASoC-Add-generic-RPI-driver-for-simple-soundcards.patch @@ -0,0 +1,300 @@ +From 8cf85a58066800ed638b4e4fca6f704275e0f588 Mon Sep 17 00:00:00 2001 +From: Tim Gover <tim.gover@raspberrypi.org> +Date: Wed, 27 Jun 2018 15:59:12 +0100 +Subject: [PATCH] ASoC: Add generic RPI driver for simple soundcards. + +The RPI simple sound card driver provides a generic ALSA SOC card driver +supporting a variety of Pi HAT soundcards. The intention is to avoid +the duplication of code for cards that can't be fully supported by +the soc simple/graph cards but are otherwise almost identical. + +This initial commit adds support for the ADAU1977 ADC, Google VoiceHat, +HifiBerry AMP, HifiBerry DAC and RPI DAC. + +Signed-off-by: Tim Gover <tim.gover@raspberrypi.org> + +ASoC: Use correct card name in rpi-simple driver + +Use the specific card name from drvdata instead of the snd_rpi_simple + +rpi-simple-soundcard: Use nicer driver name "RPi-simple" + +Rename the driver from "RPI simple soundcard" to "RPi-simple" so that +the driver name won't be mangled allowing to be used unaltered as the +card conf filename. +--- + sound/soc/bcm/rpi-simple-soundcard.c | 268 +++++++++++++++++++++++++++ + 1 file changed, 268 insertions(+) + create mode 100644 sound/soc/bcm/rpi-simple-soundcard.c + +--- /dev/null ++++ b/sound/soc/bcm/rpi-simple-soundcard.c +@@ -0,0 +1,268 @@ ++// SPDX-License-Identifier: GPL-2.0 ++/* ++ * rpi-simple-soundcard.c -- ALSA SoC Raspberry Pi soundcard. ++ * ++ * Copyright (C) 2018 Raspberry Pi. ++ * ++ * Authors: Tim Gover <tim.gover@raspberrypi.org> ++ * ++ * Based on code: ++ * hifiberry_amp.c, hifiberry_dac.c, rpi-dac.c ++ * by Florian Meier <florian.meier@koalo.de> ++ * ++ * googlevoicehat-soundcard.c ++ * by Peter Malkin <petermalkin@google.com> ++ * ++ * adau1977-adc.c ++ * by Andrey Grodzovsky <andrey2805@gmail.com> ++ * ++ * 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> ++ ++/* Parameters for generic RPI functions */ ++struct snd_rpi_simple_drvdata { ++ struct snd_soc_dai_link *dai; ++ const char* card_name; ++ unsigned int fixed_bclk_ratio; ++}; ++ ++static int snd_rpi_simple_init(struct snd_soc_pcm_runtime *rtd) ++{ ++ struct snd_rpi_simple_drvdata *drvdata = ++ snd_soc_card_get_drvdata(rtd->card); ++ struct snd_soc_dai *cpu_dai = rtd->cpu_dai; ++ ++ if (drvdata->fixed_bclk_ratio > 0) ++ return snd_soc_dai_set_bclk_ratio(cpu_dai, ++ drvdata->fixed_bclk_ratio); ++ ++ return 0; ++} ++ ++static int snd_rpi_simple_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; ++ struct snd_rpi_simple_drvdata *drvdata; ++ unsigned int sample_bits; ++ ++ drvdata = snd_soc_card_get_drvdata(rtd->card); ++ ++ if (drvdata->fixed_bclk_ratio > 0) ++ return 0; // BCLK is configured in .init ++ ++ /* The simple drivers just set the bclk_ratio to sample_bits * 2 so ++ * hard-code this for now. More complex drivers could just replace ++ * the hw_params routine. ++ */ ++ sample_bits = snd_pcm_format_physical_width(params_format(params)); ++ return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2); ++} ++ ++static struct snd_soc_ops snd_rpi_simple_ops = { ++ .hw_params = snd_rpi_simple_hw_params, ++}; ++ ++enum adau1977_clk_id { ++ ADAU1977_SYSCLK, ++}; ++ ++enum adau1977_sysclk_src { ++ ADAU1977_SYSCLK_SRC_MCLK, ++ ADAU1977_SYSCLK_SRC_LRCLK, ++}; ++ ++static int adau1977_init(struct snd_soc_pcm_runtime *rtd) ++{ ++ int ret; ++ struct snd_soc_dai *codec_dai = rtd->codec_dai; ++ ++ ret = snd_soc_dai_set_tdm_slot(codec_dai, 0, 0, 0, 0); ++ if (ret < 0) ++ return ret; ++ ++ return snd_soc_component_set_sysclk(codec_dai->component, ++ ADAU1977_SYSCLK, ADAU1977_SYSCLK_SRC_MCLK, ++ 11289600, SND_SOC_CLOCK_IN); ++} ++ ++static struct snd_soc_dai_link snd_rpi_adau1977_dai[] = { ++ { ++ .name = "adau1977", ++ .stream_name = "ADAU1977", ++ .codec_dai_name = "adau1977-hifi", ++ .codec_name = "adau1977.1-0011", ++ .init = adau1977_init, ++ .dai_fmt = SND_SOC_DAIFMT_I2S | ++ SND_SOC_DAIFMT_NB_NF | ++ SND_SOC_DAIFMT_CBM_CFM, ++ }, ++}; ++ ++static struct snd_rpi_simple_drvdata drvdata_adau1977 = { ++ .card_name = "snd_rpi_adau1977_adc", ++ .dai = snd_rpi_adau1977_dai, ++}; ++ ++static struct snd_soc_dai_link snd_googlevoicehat_soundcard_dai[] = { ++{ ++ .name = "Google voiceHAT SoundCard", ++ .stream_name = "Google voiceHAT SoundCard HiFi", ++ .codec_dai_name = "voicehat-hifi", ++ .codec_name = "voicehat-codec", ++ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | ++ SND_SOC_DAIFMT_CBS_CFS, ++}, ++}; ++ ++static struct snd_rpi_simple_drvdata drvdata_googlevoicehat = { ++ .card_name = "snd_rpi_googlevoicehat_soundcard", ++ .dai = snd_googlevoicehat_soundcard_dai, ++}; ++ ++static struct snd_soc_dai_link snd_hifiberry_amp_dai[] = { ++ { ++ .name = "HifiBerry AMP", ++ .stream_name = "HifiBerry AMP HiFi", ++ .codec_dai_name = "tas5713-hifi", ++ .codec_name = "tas5713.1-001b", ++ .dai_fmt = SND_SOC_DAIFMT_I2S | ++ SND_SOC_DAIFMT_NB_NF | ++ SND_SOC_DAIFMT_CBS_CFS, ++ }, ++}; ++ ++static struct snd_rpi_simple_drvdata drvdata_hifiberry_amp = { ++ .card_name = "snd_rpi_hifiberry_amp", ++ .dai = snd_hifiberry_amp_dai, ++ .fixed_bclk_ratio = 64, ++}; ++ ++static struct snd_soc_dai_link snd_hifiberry_dac_dai[] = { ++ { ++ .name = "HifiBerry DAC", ++ .stream_name = "HifiBerry DAC HiFi", ++ .codec_dai_name = "pcm5102a-hifi", ++ .codec_name = "pcm5102a-codec", ++ .dai_fmt = SND_SOC_DAIFMT_I2S | ++ SND_SOC_DAIFMT_NB_NF | ++ SND_SOC_DAIFMT_CBS_CFS, ++ }, ++}; ++ ++static struct snd_rpi_simple_drvdata drvdata_hifiberry_dac = { ++ .card_name = "snd_rpi_hifiberry_dac", ++ .dai = snd_hifiberry_dac_dai, ++}; ++ ++static struct snd_soc_dai_link snd_rpi_dac_dai[] = { ++{ ++ .name = "RPi-DAC", ++ .stream_name = "RPi-DAC HiFi", ++ .codec_dai_name = "pcm1794a-hifi", ++ .codec_name = "pcm1794a-codec", ++ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | ++ SND_SOC_DAIFMT_CBS_CFS, ++}, ++}; ++ ++static struct snd_rpi_simple_drvdata drvdata_rpi_dac = { ++ .card_name = "snd_rpi_rpi_dac", ++ .dai = snd_rpi_dac_dai, ++ .fixed_bclk_ratio = 64, ++}; ++ ++static const struct of_device_id snd_rpi_simple_of_match[] = { ++ { .compatible = "adi,adau1977-adc", ++ .data = (void *) &drvdata_adau1977 }, ++ { .compatible = "googlevoicehat,googlevoicehat-soundcard", ++ .data = (void *) &drvdata_googlevoicehat }, ++ { .compatible = "hifiberry,hifiberry-amp", ++ .data = (void *) &drvdata_hifiberry_amp }, ++ { .compatible = "hifiberry,hifiberry-dac", ++ .data = (void *) &drvdata_hifiberry_dac }, ++ { .compatible = "rpi,rpi-dac", &drvdata_rpi_dac}, ++ {}, ++}; ++ ++static struct snd_soc_card snd_rpi_simple = { ++ .driver_name = "RPi-simple", ++ .owner = THIS_MODULE, ++ .dai_link = NULL, ++ .num_links = 1, /* Only a single DAI supported at the moment */ ++}; ++ ++static int snd_rpi_simple_probe(struct platform_device *pdev) ++{ ++ int ret = 0; ++ const struct of_device_id *of_id; ++ ++ snd_rpi_simple.dev = &pdev->dev; ++ of_id = of_match_node(snd_rpi_simple_of_match, pdev->dev.of_node); ++ ++ if (pdev->dev.of_node && of_id->data) { ++ struct device_node *i2s_node; ++ struct snd_rpi_simple_drvdata *drvdata = ++ (struct snd_rpi_simple_drvdata *) of_id->data; ++ struct snd_soc_dai_link *dai = drvdata->dai; ++ ++ snd_soc_card_set_drvdata(&snd_rpi_simple, drvdata); ++ ++ /* More complex drivers might override individual functions */ ++ if (!dai->init) ++ dai->init = snd_rpi_simple_init; ++ if (!dai->ops) ++ dai->ops = &snd_rpi_simple_ops; ++ ++ snd_rpi_simple.name = drvdata->card_name; ++ ++ snd_rpi_simple.dai_link = dai; ++ i2s_node = of_parse_phandle(pdev->dev.of_node, ++ "i2s-controller", 0); ++ if (!i2s_node) { ++ pr_err("Failed to find i2s-controller DT node\n"); ++ return -ENODEV; ++ } ++ ++ dai->cpu_of_node = i2s_node; ++ dai->platform_of_node = i2s_node; ++ } ++ ++ ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_simple); ++ if (ret && ret != -EPROBE_DEFER) ++ dev_err(&pdev->dev, "Failed to register card %d\n", ret); ++ ++ return ret; ++} ++ ++static struct platform_driver snd_rpi_simple_driver = { ++ .driver = { ++ .name = "snd-rpi-simple", ++ .owner = THIS_MODULE, ++ .of_match_table = snd_rpi_simple_of_match, ++ }, ++ .probe = snd_rpi_simple_probe, ++}; ++MODULE_DEVICE_TABLE(of, snd_rpi_simple_of_match); ++ ++module_platform_driver(snd_rpi_simple_driver); ++ ++MODULE_AUTHOR("Tim Gover <tim.gover@raspberrypi.org>"); ++MODULE_DESCRIPTION("ASoC Raspberry Pi simple soundcard driver "); ++MODULE_LICENSE("GPL v2"); |