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154 lines
4.3 KiB
154 lines
4.3 KiB
/* |
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* ASoC Driver for Fe-Pi Audio Sound Card |
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* |
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* Author: Henry Kupis <[email protected]> |
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* Copyright 2016 |
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* based on code by Florian Meier <[email protected]> |
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* based on code by Shawn Guo <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* version 2 as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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*/ |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/io.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/jack.h> |
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#include "../codecs/sgtl5000.h" |
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static int snd_fe_pi_audio_init(struct snd_soc_pcm_runtime *rtd) |
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{ |
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struct snd_soc_card *card = rtd->card; |
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struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component; |
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snd_soc_dapm_force_enable_pin(&card->dapm, "LO"); |
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snd_soc_dapm_force_enable_pin(&card->dapm, "ADC"); |
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snd_soc_dapm_force_enable_pin(&card->dapm, "DAC"); |
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snd_soc_dapm_force_enable_pin(&card->dapm, "HP"); |
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snd_soc_component_update_bits(component, SGTL5000_CHIP_ANA_POWER, |
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SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP); |
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return 0; |
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} |
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static int snd_fe_pi_audio_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params) |
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{ |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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struct device *dev = rtd->card->dev; |
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); |
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int ret; |
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/* Set SGTL5000's SYSCLK */ |
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ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, 12288000, SND_SOC_CLOCK_IN); |
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if (ret) { |
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dev_err(dev, "could not set codec driver clock params\n"); |
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return ret; |
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} |
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return 0; |
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} |
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static struct snd_soc_ops snd_fe_pi_audio_ops = { |
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.hw_params = snd_fe_pi_audio_hw_params, |
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}; |
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SND_SOC_DAILINK_DEFS(fe_pi, |
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DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("sgtl5000.1-000a", "sgtl5000")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0"))); |
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static struct snd_soc_dai_link snd_fe_pi_audio_dai[] = { |
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{ |
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.name = "FE-PI", |
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.stream_name = "Fe-Pi HiFi", |
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
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SND_SOC_DAIFMT_CBM_CFM, |
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.ops = &snd_fe_pi_audio_ops, |
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.init = snd_fe_pi_audio_init, |
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SND_SOC_DAILINK_REG(fe_pi), |
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}, |
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}; |
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static const struct snd_soc_dapm_route fe_pi_audio_dapm_routes[] = { |
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{"ADC", NULL, "Mic Bias"}, |
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}; |
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static struct snd_soc_card fe_pi_audio = { |
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.name = "Fe-Pi Audio", |
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.owner = THIS_MODULE, |
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.dai_link = snd_fe_pi_audio_dai, |
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.num_links = ARRAY_SIZE(snd_fe_pi_audio_dai), |
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.dapm_routes = fe_pi_audio_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(fe_pi_audio_dapm_routes), |
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}; |
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static int snd_fe_pi_audio_probe(struct platform_device *pdev) |
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{ |
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int ret = 0; |
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struct snd_soc_card *card = &fe_pi_audio; |
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struct device_node *np = pdev->dev.of_node; |
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struct device_node *i2s_node; |
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struct snd_soc_dai_link *dai = &snd_fe_pi_audio_dai[0]; |
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fe_pi_audio.dev = &pdev->dev; |
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i2s_node = of_parse_phandle(np, "i2s-controller", 0); |
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if (!i2s_node) { |
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dev_err(&pdev->dev, "i2s_node phandle missing or invalid\n"); |
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return -EINVAL; |
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} |
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dai->cpus->dai_name = NULL; |
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dai->cpus->of_node = i2s_node; |
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dai->platforms->name = NULL; |
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dai->platforms->of_node = i2s_node; |
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of_node_put(i2s_node); |
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card->dev = &pdev->dev; |
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platform_set_drvdata(pdev, card); |
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ret = devm_snd_soc_register_card(&pdev->dev, card); |
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if (ret && ret != -EPROBE_DEFER) |
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dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret); |
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return ret; |
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} |
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static const struct of_device_id snd_fe_pi_audio_of_match[] = { |
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{ .compatible = "fe-pi,fe-pi-audio", }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, snd_fe_pi_audio_of_match); |
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static struct platform_driver snd_fe_pi_audio_driver = { |
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.driver = { |
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.name = "snd-fe-pi-audio", |
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.owner = THIS_MODULE, |
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.of_match_table = snd_fe_pi_audio_of_match, |
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}, |
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.probe = snd_fe_pi_audio_probe, |
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}; |
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module_platform_driver(snd_fe_pi_audio_driver); |
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MODULE_AUTHOR("Henry Kupis <[email protected]>"); |
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MODULE_DESCRIPTION("ASoC Driver for Fe-Pi Audio"); |
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MODULE_LICENSE("GPL v2");
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