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Add support for Fe-Pi audio sound card. (#1867)

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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>
This commit is contained in:
Fe-Pi
2017-03-01 04:42:43 -07:00
committed by popcornmix
parent a4062a0580
commit 3c685ea18a
1 changed files with 152 additions and 0 deletions
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152
sound/soc/bcm/fe-pi-audio.c Normal file
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/*
* 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");