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From 0435c03e212129e384cd49b19fca7a55dbf1ec50 Mon Sep 17 00:00:00 2001
From: Aaron Shaw <shawaj@gmail.com>
Date: Thu, 7 Apr 2016 21:26:21 +0100
Subject: [PATCH] Add Support for JustBoom Audio boards
justboom-dac: Adjust for ALSA API change
As of 4.4, snd_soc_limit_volume now takes a struct snd_soc_card *
rather than a struct snd_soc_codec *.
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
ASoC: justboom-dac: fix S24_LE format
Remove set_bclk_ratio call so 24-bit data is transmitted in
24 bclk cycles.
Also remove hw_params as it's no longer needed.
Signed-off-by: Matthias Reichl <hias@horus.com>
---
sound/soc/bcm/justboom-dac.c | 145 +++++++++++++++++++++++++++++++++++
1 file changed, 145 insertions(+)
create mode 100644 sound/soc/bcm/justboom-dac.c
--- /dev/null
+++ b/sound/soc/bcm/justboom-dac.c
@@ -0,0 +1,145 @@
+/*
+ * ASoC Driver for JustBoom DAC Raspberry Pi HAT Sound Card
+ *
+ * Author: Milan Neskovic
+ * Copyright 2016
+ * based on code by Daniel Matuschek <info@crazy-audio.com>
+ * based on code by Florian Meier <florian.meier@koalo.de>
+ *
+ * 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 <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+
+#include "../codecs/pcm512x.h"
+
+static bool digital_gain_0db_limit = true;
+
+static int snd_rpi_justboom_dac_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_component *component = rtd->codec_dai->component;
+ snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x08, 0x08);
+ snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_4, 0xf, 0x02);
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
+
+ if (digital_gain_0db_limit)
+ {
+ int ret;
+ struct snd_soc_card *card = rtd->card;
+
+ ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207);
+ if (ret < 0)
+ dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
+ }
+
+ return 0;
+}
+
+static int snd_rpi_justboom_dac_startup(struct snd_pcm_substream *substream) {
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_component *component = rtd->codec_dai->component;
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
+ return 0;
+}
+
+static void snd_rpi_justboom_dac_shutdown(struct snd_pcm_substream *substream) {
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_component *component = rtd->codec_dai->component;
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08,0x00);
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_rpi_justboom_dac_ops = {
+ .startup = snd_rpi_justboom_dac_startup,
+ .shutdown = snd_rpi_justboom_dac_shutdown,
+};
+
+static struct snd_soc_dai_link snd_rpi_justboom_dac_dai[] = {
+{
+ .name = "JustBoom DAC",
+ .stream_name = "JustBoom DAC HiFi",
+ .cpu_dai_name = "bcm2708-i2s.0",
+ .codec_dai_name = "pcm512x-hifi",
+ .platform_name = "bcm2708-i2s.0",
+ .codec_name = "pcm512x.1-004d",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ .ops = &snd_rpi_justboom_dac_ops,
+ .init = snd_rpi_justboom_dac_init,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_justboom_dac = {
+ .name = "snd_rpi_justboom_dac",
+ .driver_name = "JustBoomDac",
+ .owner = THIS_MODULE,
+ .dai_link = snd_rpi_justboom_dac_dai,
+ .num_links = ARRAY_SIZE(snd_rpi_justboom_dac_dai),
+};
+
+static int snd_rpi_justboom_dac_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+
+ snd_rpi_justboom_dac.dev = &pdev->dev;
+
+ if (pdev->dev.of_node) {
+ struct device_node *i2s_node;
+ struct snd_soc_dai_link *dai = &snd_rpi_justboom_dac_dai[0];
+ i2s_node = of_parse_phandle(pdev->dev.of_node,
+ "i2s-controller", 0);
+
+ if (i2s_node) {
+ dai->cpu_dai_name = NULL;
+ dai->cpu_of_node = i2s_node;
+ dai->platform_name = NULL;
+ dai->platform_of_node = i2s_node;
+ }
+
+ digital_gain_0db_limit = !of_property_read_bool(
+ pdev->dev.of_node, "justboom,24db_digital_gain");
+ }
+
+ ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_justboom_dac);
+ 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_rpi_justboom_dac_of_match[] = {
+ { .compatible = "justboom,justboom-dac", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, snd_rpi_justboom_dac_of_match);
+
+static struct platform_driver snd_rpi_justboom_dac_driver = {
+ .driver = {
+ .name = "snd-rpi-justboom-dac",
+ .owner = THIS_MODULE,
+ .of_match_table = snd_rpi_justboom_dac_of_match,
+ },
+ .probe = snd_rpi_justboom_dac_probe,
+};
+
+module_platform_driver(snd_rpi_justboom_dac_driver);
+
+MODULE_AUTHOR("Milan Neskovic <info@justboom.co>");
+MODULE_DESCRIPTION("ASoC Driver for JustBoom PI DAC HAT Sound Card");
+MODULE_LICENSE("GPL v2");
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