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139 lines
4.0 KiB
Diff
139 lines
4.0 KiB
Diff
From f375073d23af1f3818c8a4fcf24406e1ab6fcc5c Mon Sep 17 00:00:00 2001
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From: Miquel <miquelblauw@hotmail.com>
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Date: Fri, 24 Feb 2017 20:51:06 +0100
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Subject: [PATCH 080/773] sound: Support for Dion Audio LOCO-V2 DAC-AMP HAT
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Signed-off-by: Miquel Blauw <info@dionaudio.nl>
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ASoC: dionaudio_loco-v2: fix S24_LE format
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Remove set_bclk_ratio call so 24-bit data is transmitted in
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24 bclk cycles.
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Also remove hw_params and ops as they are no longer needed.
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Signed-off-by: Matthias Reichl <hias@horus.com>
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---
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sound/soc/bcm/dionaudio_loco-v2.c | 115 ++++++++++++++++++++++++++++++
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1 file changed, 115 insertions(+)
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create mode 100644 sound/soc/bcm/dionaudio_loco-v2.c
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--- /dev/null
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+++ b/sound/soc/bcm/dionaudio_loco-v2.c
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@@ -0,0 +1,115 @@
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+/*
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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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+
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+#include <linux/module.h>
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+#include <linux/platform_device.h>
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+
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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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+
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+static bool digital_gain_0db_limit = true;
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+
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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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+
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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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+
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+ return 0;
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+}
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+
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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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+ .cpu_dai_name = "bcm2708-i2s.0",
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+ .codec_dai_name = "pcm512x-hifi",
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+ .platform_name = "bcm2708-i2s.0",
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+ .codec_name = "pcm512x.1-004d",
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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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+},};
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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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+
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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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+
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+ snd_rpi_dionaudio_loco_v2.dev = &pdev->dev;
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+
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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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+
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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->cpu_dai_name = NULL;
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+ dai->cpu_of_node = i2s_node;
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+ dai->platform_name = NULL;
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+ dai->platform_of_node = i2s_node;
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+ }
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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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+
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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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+
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+ return ret;
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+}
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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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+
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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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+
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+module_platform_driver(snd_rpi_dionaudio_loco_v2_driver);
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+
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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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