--- /dev/null
+// Definitions for Fe-Pi Audio
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2708";
+
+ fragment@0 {
+ target = <&clocks>;
+ __overlay__ {
+ sgtl5000_mclk: sgtl5000_mclk {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <12288000>;
+ clock-output-names = "sgtl5000-mclk";
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&soc>;
+ __overlay__ {
+ reg_1v8: reg_1v8@0 {
+ compatible = "regulator-fixed";
+ regulator-name = "1V8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&i2c1>;
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ sgtl5000@0a {
+ #sound-dai-cells = <0>;
+ compatible = "fepi,sgtl5000";
+ reg = <0x0a>;
+ clocks = <&sgtl5000_mclk>;
+ micbias-resistor-k-ohms = <2>;
+ micbias-voltage-m-volts = <3000>;
+ VDDA-supply = <&vdd_3v3_reg>;
+ VDDIO-supply = <&vdd_3v3_reg>;
+ VDDD-supply = <®_1v8>;
+ status = "okay";
+ };
+ };
+ };
+
+ fragment@3 {
+ target = <&i2s>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+
+ fragment@4 {
+ target = <&sound>;
+ __overlay__ {
+ compatible = "fe-pi,fe-pi-audio";
+ i2s-controller = <&i2s>;
+ status = "okay";
+ };
+ };
+};
--- /dev/null
+/*
+ * ASoC Driver for Fe-Pi Audio Sound Card
+ *
+ * Author: Henry Kupis <kuupaz@gmail.com>
+ * Copyright 2016
+ * based on code by Florian Meier <florian.meier@koalo.de>
+ * based on code by Shawn Guo <shawn.guo@linaro.org>
+ *
+ * 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 <linux/io.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+
+#include "../codecs/sgtl5000.h"
+
+static int snd_fe_pi_audio_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_card *card = rtd->card;
+ struct snd_soc_codec *codec = rtd->codec;
+
+ snd_soc_dapm_force_enable_pin(&card->dapm, "LO");
+ snd_soc_dapm_force_enable_pin(&card->dapm, "ADC");
+ snd_soc_dapm_force_enable_pin(&card->dapm, "DAC");
+ snd_soc_dapm_force_enable_pin(&card->dapm, "HP");
+ snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER,
+ SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP);
+
+ return 0;
+}
+
+static int snd_fe_pi_audio_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct device *dev = rtd->card->dev;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+
+ int ret;
+
+ /* Set SGTL5000's SYSCLK */
+ ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, 12288000, SND_SOC_CLOCK_IN);
+ if (ret) {
+ dev_err(dev, "could not set codec driver clock params\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+
+static struct snd_soc_ops snd_fe_pi_audio_ops = {
+ .hw_params = snd_fe_pi_audio_hw_params,
+};
+
+static struct snd_soc_dai_link snd_fe_pi_audio_dai[] = {
+ {
+ .name = "FE-PI",
+ .stream_name = "Fe-Pi HiFi",
+ .cpu_dai_name = "bcm2708-i2s.0",
+ .codec_dai_name = "sgtl5000",
+ .platform_name = "bcm2708-i2s.0",
+ .codec_name = "sgtl5000.1-000a",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBM_CFM,
+ .ops = &snd_fe_pi_audio_ops,
+ .init = snd_fe_pi_audio_init,
+ },
+};
+
+static const struct snd_soc_dapm_route fe_pi_audio_dapm_routes[] = {
+ {"ADC", NULL, "Mic Bias"},
+};
+
+
+static struct snd_soc_card fe_pi_audio = {
+ .name = "Fe-Pi Audio",
+ .owner = THIS_MODULE,
+ .dai_link = snd_fe_pi_audio_dai,
+ .num_links = ARRAY_SIZE(snd_fe_pi_audio_dai),
+
+ .dapm_routes = fe_pi_audio_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(fe_pi_audio_dapm_routes),
+};
+
+static int snd_fe_pi_audio_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct snd_soc_card *card = &fe_pi_audio;
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *i2s_node;
+ struct snd_soc_dai_link *dai = &snd_fe_pi_audio_dai[0];
+
+ fe_pi_audio.dev = &pdev->dev;
+
+ i2s_node = of_parse_phandle(np, "i2s-controller", 0);
+ if (!i2s_node) {
+ dev_err(&pdev->dev, "i2s_node phandle missing or invalid\n");
+ return -EINVAL;
+ }
+
+ dai->cpu_dai_name = NULL;
+ dai->cpu_of_node = i2s_node;
+ dai->platform_name = NULL;
+ dai->platform_of_node = i2s_node;
+
+ of_node_put(i2s_node);
+
+ card->dev = &pdev->dev;
+ platform_set_drvdata(pdev, card);
+
+ 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_fe_pi_audio_remove(struct platform_device *pdev)
+{
+ return snd_soc_unregister_card(&fe_pi_audio);
+}
+
+static const struct of_device_id snd_fe_pi_audio_of_match[] = {
+ { .compatible = "fe-pi,fe-pi-audio", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, snd_fe_pi_audio_of_match);
+
+static struct platform_driver snd_fe_pi_audio_driver = {
+ .driver = {
+ .name = "snd-fe-pi-audio",
+ .owner = THIS_MODULE,
+ .of_match_table = snd_fe_pi_audio_of_match,
+ },
+ .probe = snd_fe_pi_audio_probe,
+ .remove = snd_fe_pi_audio_remove,
+};
+
+module_platform_driver(snd_fe_pi_audio_driver);
+
+MODULE_AUTHOR("Henry Kupis <fe-pi@cox.net>");
+MODULE_DESCRIPTION("ASoC Driver for Fe-Pi Audio");
+MODULE_LICENSE("GPL v2");
projects / mirror_ubuntu-zesty-kernel.git / commitdiff