--- /dev/null
+From 8ed265197d7a8f9c1a328d262bfe91050716ad76 Mon Sep 17 00:00:00 2001
+From: Fe-Pi <fe-pi@cox.net>
+Date: Wed, 1 Mar 2017 04:42:43 -0700
+Subject: [PATCH] Add support for Fe-Pi audio sound card. (#1867)
+
+Fe-Pi Audio Sound Card is based on NXP SGTL5000 codec.
+Mechanical specification of the board is the same the Raspberry Pi Zero.
+3.5mm jacks for Headphone/Mic, Line In, and Line Out.
+
+Signed-off-by: Henry Kupis <fe-pi@cox.net>
+---
+ sound/soc/bcm/fe-pi-audio.c | 152 ++++++++++++++++++++++++++++++++++++
+ 1 file changed, 152 insertions(+)
+ create mode 100644 sound/soc/bcm/fe-pi-audio.c
+
+--- /dev/null
++++ b/sound/soc/bcm/fe-pi-audio.c
+@@ -0,0 +1,152 @@
++/*
++ * 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_component *component = rtd->codec_dai->component;
++
++ 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_component_update_bits(component, 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 = devm_snd_soc_register_card(&pdev->dev, card);
++ if (ret && ret != -EPROBE_DEFER)
++ dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
++
++ return ret;
++}
++
++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,
++};
++
++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 / openwrt / openwrt.git / blobdiff