sound: soc: bcm: Added Sound card driver for Dacberry400 Audio card for Raspberry Pi 400

Added Sound card driver for DACberry400 Audio card.

Signed-off-by: Ashish Vara <ashishhvara@gmail.com>

sound/soc/bcm/Kconfig

@@ -324,3 +324,10 @@ config SND_RPI_WM8804_SOUNDCARD
 	help
 	  Say Y or M if you want to add support for the Raspberry Pi
           generic driver for WM8804 based soundcards.
+
+config SND_DACBERRY400
+	tristate "Support for DACBERRY400 Soundcard"
+	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+	select SND_SOC_TLV320AIC3X_I2C
+	help
+	  Say Y or M if you want to add support for tlv320aic3x add-on

sound/soc/bcm/Makefile

@@ -48,6 +48,7 @@ snd-soc-rpi-simple-soundcard-objs := rpi-simple-soundcard.o
 snd-soc-rpi-wm8804-soundcard-objs := rpi-wm8804-soundcard.o
 snd-soc-pifi-40-objs := pifi-40.o
 snd-soc-chipdip-dac-objs := chipdip-dac.o
+snd-soc-dacberry400-objs := dacberry400.o
 
 obj-$(CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD)  += snd-soc-googlevoicehat-codec.o
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
@@ -80,3 +81,4 @@ obj-$(CONFIG_SND_RPI_SIMPLE_SOUNDCARD) += snd-soc-rpi-simple-soundcard.o
 obj-$(CONFIG_SND_RPI_WM8804_SOUNDCARD) += snd-soc-rpi-wm8804-soundcard.o
 obj-$(CONFIG_SND_BCM2708_SOC_PIFI_40) += snd-soc-pifi-40.o
 obj-$(CONFIG_SND_BCM2708_SOC_CHIPDIP_DAC) += snd-soc-chipdip-dac.o
+obj-$(CONFIG_SND_DACBERRY400) += snd-soc-dacberry400.o

sound/soc/bcm/dacberry400.c

@@ -0,0 +1,259 @@
+/*
+ * ASoC Driver for Dacberry400 soundcard
+ * Author:
+ *      Ashish Vara<ashishhvara@gmail.com>
+ *      Copyright 2022
+ *
+ * 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/gpio/consumer.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 <linux/i2c.h>
+#include <linux/acpi.h>
+#include <linux/slab.h>
+#include "../sound/soc/codecs/tlv320aic3x.h"
+
+static const struct snd_kcontrol_new dacberry400_controls[] = {
+	SOC_DAPM_PIN_SWITCH("MIC Jack"),
+	SOC_DAPM_PIN_SWITCH("Line In"),
+	SOC_DAPM_PIN_SWITCH("Line Out"),
+	SOC_DAPM_PIN_SWITCH("Headphone Jack"),
+};
+
+static const struct snd_soc_dapm_widget dacberry400_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone Jack", NULL),
+	SND_SOC_DAPM_MIC("MIC Jack", NULL),
+	SND_SOC_DAPM_LINE("Line In", NULL),
+	SND_SOC_DAPM_LINE("Line Out", NULL),
+};
+
+static const struct snd_soc_dapm_route dacberry400_audio_map[] = {
+	{"Headphone Jack", NULL, "HPLOUT"},
+	{"Headphone Jack", NULL, "HPROUT"},
+
+	{"LINE1L", NULL, "Line In"},
+	{"LINE1R", NULL, "Line In"},
+
+	{"Line Out", NULL, "LLOUT"},
+	{"Line Out", NULL, "RLOUT"},
+
+	{"MIC3L", NULL, "MIC Jack"},
+	{"MIC3R", NULL, "MIC Jack"},
+};
+
+static int snd_rpi_dacberry400_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+	struct snd_soc_component *component = codec_dai->component;
+	int ret;
+
+	ret = snd_soc_dai_set_sysclk(codec_dai, 2, 12000000,
+					SND_SOC_CLOCK_OUT);
+
+	if (ret && ret != -ENOTSUPP)
+		goto err;
+
+	snd_soc_component_write(component, HPRCOM_CFG, 0x20);
+	snd_soc_component_write(component, DACL1_2_HPLOUT_VOL, 0x80);
+	snd_soc_component_write(component, DACR1_2_HPROUT_VOL, 0x80);
+err:
+	return ret;
+}
+
+static int snd_rpi_dacberry400_set_bias_level(struct snd_soc_card *card,
+	struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level)
+{
+	struct snd_soc_pcm_runtime *rtd;
+	struct snd_soc_dai *codec_dai;
+	struct snd_soc_component *component;
+	struct dacberry_priv *aic3x;
+	u8 hpcom_reg = 0;
+
+	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
+	codec_dai = asoc_rtd_to_codec(rtd, 0);
+	component = codec_dai->component;
+	aic3x = snd_soc_component_get_drvdata(component);
+	if (dapm->dev != codec_dai->dev)
+		return 0;
+
+	switch (level) {
+	case SND_SOC_BIAS_PREPARE:
+		if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
+			break;
+		/* UNMUTE ADC/DAC */
+		hpcom_reg = snd_soc_component_read(component, HPLCOM_CFG);
+		snd_soc_component_write(component, HPLCOM_CFG, hpcom_reg | 0x20);
+		snd_soc_component_write(component, LINE1R_2_RADC_CTRL, 0x04);
+		snd_soc_component_write(component, LINE1L_2_LADC_CTRL, 0x04);
+		snd_soc_component_write(component, LADC_VOL, 0x00);
+		snd_soc_component_write(component, RADC_VOL, 0x00);
+		pr_info("%s: unmute ADC/DAC\n", __func__);
+		break;
+
+	case SND_SOC_BIAS_STANDBY:
+		if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
+			break;
+		/* MUTE ADC/DAC */
+		snd_soc_component_write(component, LDAC_VOL, 0x80);
+		snd_soc_component_write(component, RDAC_VOL, 0x80);
+		snd_soc_component_write(component, LADC_VOL, 0x80);
+		snd_soc_component_write(component, RADC_VOL, 0x80);
+		snd_soc_component_write(component, LINE1R_2_RADC_CTRL, 0x00);
+		snd_soc_component_write(component, LINE1L_2_LADC_CTRL, 0x00);
+		snd_soc_component_write(component, HPLCOM_CFG, 0x00);
+		pr_info("%s: mute ADC/DAC\n", __func__);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int snd_rpi_dacberry400_hw_params(struct snd_pcm_substream *substream,
+					   struct snd_pcm_hw_params *params)
+{
+	int ret = 0;
+	u8 data;
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+	struct snd_soc_component *component = codec_dai->component;
+	int fsref = (params_rate(params) % 11025 == 0) ? 44100 : 48000;
+	int channels = params_channels(params);
+	int width = 32;
+	u8 clock = 0;
+
+	data = (LDAC2LCH | RDAC2RCH);
+	data |= (fsref == 44100) ? FSREF_44100 : FSREF_48000;
+	if (params_rate(params) >= 64000)
+		data |= DUAL_RATE_MODE;
+	ret = snd_soc_component_write(component, 0x7, data);
+	width = params_width(params);
+
+	clock = snd_soc_component_read(component, 2);
+
+	ret = snd_soc_dai_set_bclk_ratio(cpu_dai, channels*width);
+
+	return ret;
+}
+
+static const struct snd_soc_ops snd_rpi_dacberry400_ops = {
+	.hw_params = snd_rpi_dacberry400_hw_params,
+};
+
+
+SND_SOC_DAILINK_DEFS(rpi_dacberry400,
+	DAILINK_COMP_ARRAY(COMP_CPU("bcm2835-i2s.0")),
+	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x.1-0018", "tlv320aic3x-hifi")),
+	DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2835-i2s.0")));
+
+static struct snd_soc_dai_link snd_rpi_dacberry400_dai[] = {
+{
+	.dai_fmt		= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+					SND_SOC_DAIFMT_CBS_CFS,
+	.init			= snd_rpi_dacberry400_init,
+	.ops			= &snd_rpi_dacberry400_ops,
+	.symmetric_rate		= 1,
+	SND_SOC_DAILINK_REG(rpi_dacberry400),
+},
+};
+
+static struct snd_soc_card snd_rpi_dacberry400 = {
+	.owner			= THIS_MODULE,
+	.dai_link		= snd_rpi_dacberry400_dai,
+	.num_links		= ARRAY_SIZE(snd_rpi_dacberry400_dai),
+	.controls		= dacberry400_controls,
+	.num_controls		= ARRAY_SIZE(dacberry400_controls),
+	.dapm_widgets		= dacberry400_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(dacberry400_widgets),
+	.dapm_routes		= dacberry400_audio_map,
+	.num_dapm_routes	= ARRAY_SIZE(dacberry400_audio_map),
+	.set_bias_level		= snd_rpi_dacberry400_set_bias_level,
+};
+
+static int snd_rpi_dacberry400_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	snd_rpi_dacberry400.dev = &pdev->dev;
+
+	if (pdev->dev.of_node) {
+		struct device_node *i2s_node;
+		struct snd_soc_card *card = &snd_rpi_dacberry400;
+		struct snd_soc_dai_link *dai = &snd_rpi_dacberry400_dai[0];
+
+		i2s_node = of_parse_phandle(pdev->dev.of_node,
+					    "i2s-controller", 0);
+		if (i2s_node) {
+			dai->cpus->dai_name = NULL;
+			dai->cpus->of_node = i2s_node;
+			dai->platforms->name = NULL;
+			dai->platforms->of_node = i2s_node;
+			of_node_put(i2s_node);
+		}
+
+		if (of_property_read_string(pdev->dev.of_node, "card_name",
+					    &card->name))
+			card->name = "tlvaudioCODEC";
+
+		if (of_property_read_string(pdev->dev.of_node, "dai_name",
+					    &dai->name))
+			dai->name = "tlvaudio CODEC";
+
+	}
+
+	ret = snd_soc_register_card(&snd_rpi_dacberry400);
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev,
+				"snd_soc_register_card() failed: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int snd_rpi_dacberry400_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_card(&snd_rpi_dacberry400);
+	return 0;
+}
+
+static const struct of_device_id dacberry400_match_id[] = {
+	{ .compatible = "osaelectronics,dacberry400",},
+	{},
+};
+MODULE_DEVICE_TABLE(of, dacberry400_match_id);
+
+static struct platform_driver snd_rpi_dacberry400_driver = {
+	.driver = {
+		.name = "snd-rpi-dacberry400",
+		.owner = THIS_MODULE,
+		.of_match_table = dacberry400_match_id,
+	},
+	.probe = snd_rpi_dacberry400_probe,
+	.remove = snd_rpi_dacberry400_remove,
+};
+
+module_platform_driver(snd_rpi_dacberry400_driver);
+
+MODULE_AUTHOR("Ashish Vara");
+MODULE_DESCRIPTION("Dacberry400 sound card driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:dacberry400");
+MODULE_SOFTDEP("pre: snd-soc-tlv320aic3x");