Audiophonics I-Sabre 9038Q2M DAC driver

Signed-off-by: Audiophonics <contact@audiophonics.fr>

sound/soc/bcm/Kconfig

@@ -118,6 +118,13 @@ config SND_BCM2708_SOC_IQAUDIO_DIGI
 	help
 	  Say Y or M if you want to add support for IQAudIO Digital IO board.
 
+config SND_BCM2708_SOC_I_SABRE_Q2M
+        tristate "Support for Audiophonics I-Sabre Q2M DAC"
+        depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+        select SND_SOC_I_SABRE_CODEC
+        help
+        Say Y or M if you want to add support for Audiophonics I-SABRE Q2M DAC
+
 config SND_BCM2708_SOC_ADAU1977_ADC
 	tristate "Support for ADAU1977 ADC"
 	depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S

sound/soc/bcm/Makefile

@@ -19,6 +19,7 @@ snd-soc-justboom-dac-objs := justboom-dac.o
 snd-soc-rpi-cirrus-objs := rpi-cirrus.o
 snd-soc-rpi-proto-objs := rpi-proto.o
 snd-soc-iqaudio-dac-objs := iqaudio-dac.o
+ snd-soc-i-sabre-q2m-objs := i-sabre-q2m.o
 snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
 snd-soc-audioinjector-octo-soundcard-objs := audioinjector-octo-soundcard.o
 snd-soc-audiosense-pi-objs := audiosense-pi.o
@@ -41,6 +42,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_DAC) += snd-soc-justboom-dac.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_CIRRUS) += snd-soc-rpi-cirrus.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
 obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
+ obj-$(CONFIG_SND_BCM2708_SOC_I_SABRE_Q2M) += snd-soc-i-sabre-q2m.o
 obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
 obj-$(CONFIG_SND_AUDIOINJECTOR_OCTO_SOUNDCARD) += snd-soc-audioinjector-octo-soundcard.o
 obj-$(CONFIG_SND_AUDIOSENSE_PI) += snd-soc-audiosense-pi.o

sound/soc/bcm/i-sabre-q2m.c

@@ -0,0 +1,157 @@
+/*
+ * ASoC Driver for I-Sabre Q2M
+ *
+ * Author: Satoru Kawase
+ * Modified by: Xiao Qingyong
+ * Update kernel v4.18+ by : Audiophonics
+ * 		Copyright 2018 Audiophonics
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <asm/uaccess.h>
+#include <sound/core.h>
+#include <sound/soc.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#include "../codecs/i-sabre-codec.h"
+
+
+static int snd_rpi_i_sabre_q2m_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_component *component = rtd->codec_dai->component;
+	unsigned int value;
+
+	/* Device ID */
+	value = snd_soc_component_read32(component, ISABRECODEC_REG_01);
+	dev_info(component->card->dev, "Audiophonics Device ID : %02X\n", value);
+
+	/* API revision */
+	value = snd_soc_component_read32(component, ISABRECODEC_REG_02);
+	dev_info(component->card->dev, "Audiophonics API revision : %02X\n", value);
+
+	return 0;
+}
+
+static int snd_rpi_i_sabre_q2m_hw_params(
+	struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd     = substream->private_data;
+	struct snd_soc_dai         *cpu_dai = rtd->cpu_dai;
+	int bclk_ratio;
+
+	bclk_ratio = snd_pcm_format_physical_width(
+			params_format(params)) * params_channels(params);
+	return snd_soc_dai_set_bclk_ratio(cpu_dai, bclk_ratio);
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_rpi_i_sabre_q2m_ops = {
+	.hw_params = snd_rpi_i_sabre_q2m_hw_params,
+};
+
+
+static struct snd_soc_dai_link snd_rpi_i_sabre_q2m_dai[] = {
+	{
+		.name           = "I-Sabre Q2M",
+		.stream_name    = "I-Sabre Q2M DAC",
+		.cpu_dai_name   = "bcm2708-i2s.0",
+		.codec_dai_name = "i-sabre-codec-dai",
+		.platform_name  = "bcm2708-i2s.0",
+		.codec_name     = "i-sabre-codec-i2c.1-0048",
+		.dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+						| SND_SOC_DAIFMT_CBS_CFS,
+		.init           = snd_rpi_i_sabre_q2m_init,
+		.ops            = &snd_rpi_i_sabre_q2m_ops,
+	}
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_i_sabre_q2m = {
+	.name      = "I-Sabre Q2M DAC",
+	.owner     = THIS_MODULE,
+	.dai_link  = snd_rpi_i_sabre_q2m_dai,
+	.num_links = ARRAY_SIZE(snd_rpi_i_sabre_q2m_dai)
+};
+
+
+static int snd_rpi_i_sabre_q2m_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	snd_rpi_i_sabre_q2m.dev = &pdev->dev;
+	if (pdev->dev.of_node) {
+		struct device_node *i2s_node;
+		struct snd_soc_dai_link *dai;
+
+		dai = &snd_rpi_i_sabre_q2m_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;
+		} else {
+			dev_err(&pdev->dev,
+			    "Property 'i2s-controller' missing or invalid\n");
+			return (-EINVAL);
+		}
+
+		dai->name        = "I-Sabre Q2M";
+		dai->stream_name = "I-Sabre Q2M DAC";
+		dai->dai_fmt     = SND_SOC_DAIFMT_I2S
+					| SND_SOC_DAIFMT_NB_NF
+					| SND_SOC_DAIFMT_CBS_CFS;
+	}
+
+	/* Wait for registering codec driver */
+	mdelay(50);
+
+	ret = snd_soc_register_card(&snd_rpi_i_sabre_q2m);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"snd_soc_register_card() failed: %d\n", ret);
+	}
+
+	return ret;
+}
+
+static int snd_rpi_i_sabre_q2m_remove(struct platform_device *pdev)
+{
+	return snd_soc_unregister_card(&snd_rpi_i_sabre_q2m);
+}
+
+static const struct of_device_id snd_rpi_i_sabre_q2m_of_match[] = {
+	{ .compatible = "audiophonics,i-sabre-q2m", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, snd_rpi_i_sabre_q2m_of_match);
+
+static struct platform_driver snd_rpi_i_sabre_q2m_driver = {
+	.driver = {
+		.name           = "snd-rpi-i-sabre-q2m",
+		.owner          = THIS_MODULE,
+		.of_match_table = snd_rpi_i_sabre_q2m_of_match,
+	},
+	.probe  = snd_rpi_i_sabre_q2m_probe,
+	.remove = snd_rpi_i_sabre_q2m_remove,
+};
+module_platform_driver(snd_rpi_i_sabre_q2m_driver);
+
+MODULE_DESCRIPTION("ASoC Driver for I-Sabre Q2M");
+MODULE_AUTHOR("Audiophonics <http://www.audiophonics.fr>");
+MODULE_LICENSE("GPL");

sound/soc/codecs/Kconfig

@@ -95,6 +95,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_ICS43432
 	select SND_SOC_INNO_RK3036
 	select SND_SOC_ISABELLE if I2C
+	select SND_SOC_I_SABRE_CODEC if I2C
 	select SND_SOC_JZ4740_CODEC
 	select SND_SOC_JZ4725B_CODEC
 	select SND_SOC_LM4857 if I2C
@@ -1476,4 +1477,8 @@ config SND_SOC_TPA6130A2
 	tristate "Texas Instruments TPA6130A2 headphone amplifier"
 	depends on I2C
 
+config SND_SOC_I_SABRE_CODEC
+	tristate "Audiophonics I-SABRE Codec"
+	depends on I2C
+
 endmenu

sound/soc/codecs/Makefile

@@ -90,6 +90,7 @@ snd-soc-hdac-hda-objs := hdac_hda.o
 snd-soc-ics43432-objs := ics43432.o
 snd-soc-inno-rk3036-objs := inno_rk3036.o
 snd-soc-isabelle-objs := isabelle.o
+snd-soc-i-sabre-codec-objs := i-sabre-codec.o
 snd-soc-jz4740-codec-objs := jz4740.o
 snd-soc-jz4725b-codec-objs := jz4725b.o
 snd-soc-l3-objs := l3.o
@@ -373,6 +374,7 @@ obj-$(CONFIG_SND_SOC_HDAC_HDA) += snd-soc-hdac-hda.o
 obj-$(CONFIG_SND_SOC_ICS43432)	+= snd-soc-ics43432.o
 obj-$(CONFIG_SND_SOC_INNO_RK3036)	+= snd-soc-inno-rk3036.o
 obj-$(CONFIG_SND_SOC_ISABELLE)	+= snd-soc-isabelle.o
+obj-$(CONFIG_SND_SOC_I_SABRE_CODEC)	+= snd-soc-i-sabre-codec.o
 obj-$(CONFIG_SND_SOC_JZ4740_CODEC)	+= snd-soc-jz4740-codec.o
 obj-$(CONFIG_SND_SOC_JZ4725B_CODEC)	+= snd-soc-jz4725b-codec.o
 obj-$(CONFIG_SND_SOC_L3)	+= snd-soc-l3.o

sound/soc/codecs/i-sabre-codec.c

@@ -0,0 +1,392 @@
+/*
+ * Driver for I-Sabre Q2M
+ *
+ * Author: Satoru Kawase
+ * Modified by: Xiao Qingyong
+ * Modified by: JC BARBAUD (Mute)
+ * Update kernel v4.18+ by : Audiophonics
+ * 		Copyright 2018 Audiophonics
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/i2c.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include <sound/tlv.h>
+
+#include "i-sabre-codec.h"
+
+
+/* I-Sabre Q2M Codec Private Data */
+struct i_sabre_codec_priv {
+	struct regmap *regmap;
+	unsigned int fmt;
+};
+
+
+/* I-Sabre Q2M Codec Default Register Value */
+static const struct reg_default i_sabre_codec_reg_defaults[] = {
+	{ ISABRECODEC_REG_10, 0x00 },
+	{ ISABRECODEC_REG_20, 0x00 },
+	{ ISABRECODEC_REG_21, 0x00 },
+	{ ISABRECODEC_REG_22, 0x00 },
+	{ ISABRECODEC_REG_24, 0x00 },
+};
+
+
+static bool i_sabre_codec_writeable(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case ISABRECODEC_REG_10:
+	case ISABRECODEC_REG_20:
+	case ISABRECODEC_REG_21:
+	case ISABRECODEC_REG_22:
+	case ISABRECODEC_REG_24:
+		return true;
+
+	default:
+		return false;
+	}
+}
+
+static bool i_sabre_codec_readable(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case ISABRECODEC_REG_01:
+	case ISABRECODEC_REG_02:
+	case ISABRECODEC_REG_10:
+	case ISABRECODEC_REG_20:
+	case ISABRECODEC_REG_21:
+	case ISABRECODEC_REG_22:
+	case ISABRECODEC_REG_24:
+		return true;
+
+	default:
+		return false;
+	}
+}
+
+static bool i_sabre_codec_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case ISABRECODEC_REG_01:
+	case ISABRECODEC_REG_02:
+		return true;
+
+	default:
+		return false;
+	}
+}
+
+
+/* Volume Scale */
+static const DECLARE_TLV_DB_SCALE(volume_tlv, -10000, 100, 0);
+
+
+/* Filter Type */
+static const char * const fir_filter_type_texts[] = {
+	"brick wall",
+	"corrected minimum phase fast",
+	"minimum phase slow",
+	"minimum phase fast",
+	"linear phase slow",
+	"linear phase fast",
+	"apodizing fast",
+};
+
+static SOC_ENUM_SINGLE_DECL(i_sabre_fir_filter_type_enum,
+				ISABRECODEC_REG_22, 0, fir_filter_type_texts);
+
+
+/* I2S / SPDIF Select */
+static const char * const iis_spdif_sel_texts[] = {
+	"I2S",
+	"SPDIF",
+};
+
+static SOC_ENUM_SINGLE_DECL(i_sabre_iis_spdif_sel_enum,
+				ISABRECODEC_REG_24, 0, iis_spdif_sel_texts);
+
+
+/* Control */
+static const struct snd_kcontrol_new i_sabre_codec_controls[] = {
+SOC_SINGLE_RANGE_TLV("Digital Playback Volume", ISABRECODEC_REG_20, 0, 0, 100, 1, volume_tlv),
+SOC_SINGLE("Digital Playback Switch", ISABRECODEC_REG_21, 0, 1, 1),
+SOC_ENUM("FIR Filter Type", i_sabre_fir_filter_type_enum),
+SOC_ENUM("I2S/SPDIF Select", i_sabre_iis_spdif_sel_enum),
+};
+
+
+static const u32 i_sabre_codec_dai_rates_slave[] = {
+	8000, 11025, 16000, 22050, 32000,
+	44100, 48000, 64000, 88200, 96000,
+	176400, 192000, 352800, 384000,
+	705600, 768000, 1411200, 1536000
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_slave = {
+	.list  = i_sabre_codec_dai_rates_slave,
+	.count = ARRAY_SIZE(i_sabre_codec_dai_rates_slave),
+};
+
+static int i_sabre_codec_dai_startup_slave(
+		struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	int ret;
+
+	ret = snd_pcm_hw_constraint_list(substream->runtime,
+			0, SNDRV_PCM_HW_PARAM_RATE, &constraints_slave);
+	if (ret != 0) {
+		dev_err(component->card->dev, "Failed to setup rates constraints: %d\n", ret);
+	}
+
+	return ret;
+}
+
+static int i_sabre_codec_dai_startup(
+		struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
+{
+	struct snd_soc_component      *component = dai->component;
+	struct i_sabre_codec_priv *i_sabre_codec
+					= snd_soc_component_get_drvdata(component);
+
+	switch (i_sabre_codec->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		return i_sabre_codec_dai_startup_slave(substream, dai);
+
+	default:
+		return (-EINVAL);
+	}
+}
+
+static int i_sabre_codec_hw_params(
+	struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params,
+	struct snd_soc_dai *dai)
+{
+	struct snd_soc_component      *component = dai->component;
+	struct i_sabre_codec_priv *i_sabre_codec
+					= snd_soc_component_get_drvdata(component);
+	unsigned int daifmt;
+	int format_width;
+
+	dev_dbg(component->card->dev, "hw_params %u Hz, %u channels\n",
+			params_rate(params), params_channels(params));
+
+	/* Check I2S Format (Bit Size) */
+	format_width = snd_pcm_format_width(params_format(params));
+	if ((format_width != 32) && (format_width != 16)) {
+		dev_err(component->card->dev, "Bad frame size: %d\n",
+				snd_pcm_format_width(params_format(params)));
+		return (-EINVAL);
+	}
+
+	/* Check Slave Mode */
+	daifmt = i_sabre_codec->fmt & SND_SOC_DAIFMT_MASTER_MASK;
+	if (daifmt != SND_SOC_DAIFMT_CBS_CFS) {
+		return (-EINVAL);
+	}
+
+	/* Notify Sampling Frequency  */
+	switch (params_rate(params))
+	{
+	case 44100:
+	case 48000:
+	case 88200:
+	case 96000:
+	case 176400:
+	case 192000:
+		snd_soc_component_update_bits(component, ISABRECODEC_REG_10, 0x01, 0x00);
+		break;
+
+	case 352800:
+	case 384000:
+	case 705600:
+	case 768000:
+	case 1411200:
+	case 1536000:
+		snd_soc_component_update_bits(component, ISABRECODEC_REG_10, 0x01, 0x01);
+		break;
+	}
+
+	return 0;
+}
+
+static int i_sabre_codec_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct snd_soc_component      *component = dai->component;
+	struct i_sabre_codec_priv *i_sabre_codec
+					= snd_soc_component_get_drvdata(component);
+
+	/* interface format */
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		break;
+
+	case SND_SOC_DAIFMT_RIGHT_J:
+	case SND_SOC_DAIFMT_LEFT_J:
+	default:
+		return (-EINVAL);
+	}
+
+	/* clock inversion */
+	if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
+		return (-EINVAL);
+	}
+
+	/* Set Audio Data Format */
+	i_sabre_codec->fmt = fmt;
+
+	return 0;
+}
+
+static int i_sabre_codec_dac_mute(struct snd_soc_dai *dai, int mute)
+{
+	struct snd_soc_component *component = dai->component;
+
+	if (mute) {
+		snd_soc_component_update_bits(component, ISABRECODEC_REG_21, 0x01, 0x01);
+	} else {
+		snd_soc_component_update_bits(component, ISABRECODEC_REG_21, 0x01, 0x00);
+	}
+
+	return 0;
+}
+
+
+static const struct snd_soc_dai_ops i_sabre_codec_dai_ops = {
+	.startup      = i_sabre_codec_dai_startup,
+	.hw_params    = i_sabre_codec_hw_params,
+	.set_fmt      = i_sabre_codec_set_fmt,
+	.digital_mute = i_sabre_codec_dac_mute,
+};
+
+static struct snd_soc_dai_driver i_sabre_codec_dai = {
+	.name = "i-sabre-codec-dai",
+	.playback = {
+		.stream_name  = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_CONTINUOUS,
+		.rate_min = 8000,
+		.rate_max = 1536000,
+		.formats      = SNDRV_PCM_FMTBIT_S16_LE
+				| SNDRV_PCM_FMTBIT_S32_LE,
+	},
+	.ops = &i_sabre_codec_dai_ops,
+};
+
+static struct snd_soc_component_driver i_sabre_codec_codec_driver = {
+		.controls         = i_sabre_codec_controls,
+		.num_controls     = ARRAY_SIZE(i_sabre_codec_controls),
+};
+
+
+static const struct regmap_config i_sabre_codec_regmap = {
+	.reg_bits         = 8,
+	.val_bits         = 8,
+	.max_register     = ISABRECODEC_MAX_REG,
+
+	.reg_defaults     = i_sabre_codec_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(i_sabre_codec_reg_defaults),
+
+	.writeable_reg    = i_sabre_codec_writeable,
+	.readable_reg     = i_sabre_codec_readable,
+	.volatile_reg     = i_sabre_codec_volatile,
+
+	.cache_type       = REGCACHE_RBTREE,
+};
+
+
+static int i_sabre_codec_probe(struct device *dev, struct regmap *regmap)
+{
+	struct i_sabre_codec_priv *i_sabre_codec;
+	int ret;
+
+	i_sabre_codec = devm_kzalloc(dev, sizeof(*i_sabre_codec), GFP_KERNEL);
+	if (!i_sabre_codec) {
+		dev_err(dev, "devm_kzalloc");
+		return (-ENOMEM);
+	}
+
+	i_sabre_codec->regmap = regmap;
+
+	dev_set_drvdata(dev, i_sabre_codec);
+
+	ret = snd_soc_register_component(dev,
+			&i_sabre_codec_codec_driver, &i_sabre_codec_dai, 1);
+	if (ret != 0) {
+		dev_err(dev, "Failed to register CODEC: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void i_sabre_codec_remove(struct device *dev)
+{
+	snd_soc_unregister_component(dev);
+}
+
+
+static int i_sabre_codec_i2c_probe(
+		struct i2c_client *i2c, const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init_i2c(i2c, &i_sabre_codec_regmap);
+	if (IS_ERR(regmap)) {
+		return PTR_ERR(regmap);
+	}
+
+	return i_sabre_codec_probe(&i2c->dev, regmap);
+}
+
+static int i_sabre_codec_i2c_remove(struct i2c_client *i2c)
+{
+	i_sabre_codec_remove(&i2c->dev);
+
+	return 0;
+}
+
+
+static const struct i2c_device_id i_sabre_codec_i2c_id[] = {
+	{ "i-sabre-codec", },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, i_sabre_codec_i2c_id);
+
+static const struct of_device_id i_sabre_codec_of_match[] = {
+	{ .compatible = "audiophonics,i-sabre-codec", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, i_sabre_codec_of_match);
+
+static struct i2c_driver i_sabre_codec_i2c_driver = {
+	.driver = {
+		.name           = "i-sabre-codec-i2c",
+		.owner          = THIS_MODULE,
+		.of_match_table = of_match_ptr(i_sabre_codec_of_match),
+	},
+	.probe    = i_sabre_codec_i2c_probe,
+	.remove   = i_sabre_codec_i2c_remove,
+	.id_table = i_sabre_codec_i2c_id,
+};
+module_i2c_driver(i_sabre_codec_i2c_driver);
+
+
+MODULE_DESCRIPTION("ASoC I-Sabre Q2M codec driver");
+MODULE_AUTHOR("Audiophonics <http://www.audiophonics.fr>");
+MODULE_LICENSE("GPL");

sound/soc/codecs/i-sabre-codec.h

@@ -0,0 +1,42 @@
+/*
+ * Driver for I-Sabre Q2M
+ *
+ * Author: Satoru Kawase
+ * Modified by: Xiao Qingyong
+ *      Copyright 2018 Audiophonics
+ *
+ * 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.
+ */
+
+#ifndef _SND_SOC_ISABRECODEC
+#define _SND_SOC_ISABRECODEC
+
+
+/* ISABRECODEC Register Address */
+#define ISABRECODEC_REG_01	0x01	/* Virtual Device ID  :  0x01 = es9038q2m */
+#define ISABRECODEC_REG_02	0x02	/* API revision       :  0x01 = Revision 01 */
+#define ISABRECODEC_REG_10	0x10	/* 0x01 = above 192kHz, 0x00 = otherwise */
+#define ISABRECODEC_REG_20	0x20	/* 0 - 100 (decimal value, 0 = min., 100 = max.) */
+#define ISABRECODEC_REG_21	0x21	/* 0x00 = Mute OFF, 0x01 = Mute ON */
+#define ISABRECODEC_REG_22	0x22	
+/*
+   0x00 = brick wall,
+   0x01 = corrected minimum phase fast,
+   0x02 = minimum phase slow,
+   0x03 = minimum phase fast,
+   0x04 = linear phase slow,
+   0x05 = linear phase fast,
+   0x06 = apodizing fast,
+*/
+//#define ISABRECODEC_REG_23	0x23	/* reserved */
+#define ISABRECODEC_REG_24	0x24	/* 0x00 = I2S, 0x01 = SPDIF */
+#define ISABRECODEC_MAX_REG	0x24	/* Maximum Register Number */
+
+#endif /* _SND_SOC_ISABRECODEC */