+++ /dev/null
-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");
projects / openwrt / openwrt.git / blobdiff