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118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
/*
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* ASoC Driver for Dion Audio LOCO-V2 DAC-AMP
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*
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* Author: Miquel Blauw <info@dionaudio.nl>
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* Copyright 2017
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*
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* Based on the software of the RPi-DAC writen by Florian Meier
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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 <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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static bool digital_gain_0db_limit = true;
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static int snd_rpi_dionaudio_loco_v2_init(struct snd_soc_pcm_runtime *rtd)
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{
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if (digital_gain_0db_limit) {
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int ret;
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struct snd_soc_card *card = rtd->card;
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ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207);
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if (ret < 0)
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dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
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}
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return 0;
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}
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SND_SOC_DAILINK_DEFS(dionaudio_loco_v2,
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DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")),
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DAILINK_COMP_ARRAY(COMP_CODEC("pcm512x.1-004d", "pcm512x-hifi")),
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DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0")));
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static struct snd_soc_dai_link snd_rpi_dionaudio_loco_v2_dai[] = {
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{
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.name = "DionAudio LOCO-V2",
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.stream_name = "DionAudio LOCO-V2 DAC-AMP",
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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.init = snd_rpi_dionaudio_loco_v2_init,
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SND_SOC_DAILINK_REG(dionaudio_loco_v2),
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},};
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/* audio machine driver */
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static struct snd_soc_card snd_rpi_dionaudio_loco_v2 = {
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.name = "Dion Audio LOCO-V2",
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.dai_link = snd_rpi_dionaudio_loco_v2_dai,
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.num_links = ARRAY_SIZE(snd_rpi_dionaudio_loco_v2_dai),
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};
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static int snd_rpi_dionaudio_loco_v2_probe(struct platform_device *pdev)
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{
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int ret = 0;
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snd_rpi_dionaudio_loco_v2.dev = &pdev->dev;
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if (pdev->dev.of_node) {
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struct device_node *i2s_node;
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struct snd_soc_dai_link *dai =
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&snd_rpi_dionaudio_loco_v2_dai[0];
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i2s_node = of_parse_phandle(pdev->dev.of_node,
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"i2s-controller", 0);
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if (i2s_node) {
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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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}
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digital_gain_0db_limit = !of_property_read_bool(
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pdev->dev.of_node, "dionaudio,24db_digital_gain");
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}
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ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_dionaudio_loco_v2);
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if (ret)
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dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
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ret);
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return ret;
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}
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static const struct of_device_id dionaudio_of_match[] = {
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{ .compatible = "dionaudio,dionaudio-loco-v2", },
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{},
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};
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MODULE_DEVICE_TABLE(of, dionaudio_of_match);
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static struct platform_driver snd_rpi_dionaudio_loco_v2_driver = {
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.driver = {
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.name = "snd-rpi-dionaudio-loco-v2",
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.owner = THIS_MODULE,
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.of_match_table = dionaudio_of_match,
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},
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.probe = snd_rpi_dionaudio_loco_v2_probe,
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};
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module_platform_driver(snd_rpi_dionaudio_loco_v2_driver);
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MODULE_AUTHOR("Miquel Blauw <info@dionaudio.nl>");
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MODULE_DESCRIPTION("ASoC Driver for DionAudio LOCO-V2");
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MODULE_LICENSE("GPL v2");
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