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From:   <cy_huang@richtek.com>
To:     Mark Brown <broonie@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>
CC:     Liam Girdwood <lgirdwood@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        ChiYuan Huang <cy_huang@richtek.com>,
        Allen Lin <allen_lin@richtek.com>,
        <alsa-devel@alsa-project.org>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
Subject: [PATCH v2 2/2] ASoC: codecs: Add Richtek rtq9128audio amplifier support
Date:   Tue, 19 Sep 2023 09:18:21 +0800
Message-ID: <1695086301-10376-3-git-send-email-cy_huang@richtek.com>
In-Reply-To: <1695086301-10376-1-git-send-email-cy_huang@richtek.com>
References: <1695086301-10376-1-git-send-email-cy_huang@richtek.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

From: ChiYuan Huang <cy_huang@richtek.com>

Add Richtek rtq9128 automotive audio amplifier.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---
 sound/soc/codecs/Kconfig   |  15 +
 sound/soc/codecs/Makefile  |   2 +
 sound/soc/codecs/rtq9128.c | 742 +++++++++++++++++++++++++++++++++++++
 3 files changed, 759 insertions(+)
 create mode 100644 sound/soc/codecs/rtq9128.c

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index f1e1dbc509f6..dfa7ea7782cc 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -218,6 +218,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_RT1316_SDW
 	imply SND_SOC_RT1318_SDW
 	imply SND_SOC_RT9120
+	imply SND_SOC_RTQ9128
 	imply SND_SOC_SDW_MOCKUP
 	imply SND_SOC_SGTL5000
 	imply SND_SOC_SI476X
@@ -1636,6 +1637,20 @@ config SND_SOC_RT9120
 	  Enable support for Richtek RT9120 20W, stereo, inductor-less,
 	  high-efficiency Class-D audio amplifier.
 
+config SND_SOC_RTQ9128
+	tristate "Richtek RTQ9128 45W Digital Input Amplifier"
+	depends on I2C
+	select REGMAP
+	help
+	  Enable support for Richtek RTQ9128 digital input 4-channel
+	  automotive audio amplifier.  It is a ultra-low output noise,
+	  high-efficiency, four-channel class-D audio power amplifier
+	  that can deliver over 87% power efficienty at 4x75W into 4Ohm,
+	  25V supply in automotive applications.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-soc-rtq9128.
+
 config SND_SOC_SDW_MOCKUP
 	tristate "SoundWire mockup codec"
 	depends on EXPERT
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index a87e56938ce5..678b41c09210 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -245,6 +245,7 @@ snd-soc-rt715-objs := rt715.o rt715-sdw.o
 snd-soc-rt715-sdca-objs := rt715-sdca.o rt715-sdca-sdw.o
 snd-soc-rt722-sdca-objs := rt722-sdca.o rt722-sdca-sdw.o
 snd-soc-rt9120-objs := rt9120.o
+snd-soc-rtq9128-objs := rtq9128.o
 snd-soc-sdw-mockup-objs := sdw-mockup.o
 snd-soc-sgtl5000-objs := sgtl5000.o
 snd-soc-alc5623-objs := alc5623.o
@@ -627,6 +628,7 @@ obj-$(CONFIG_SND_SOC_RT715)     += snd-soc-rt715.o
 obj-$(CONFIG_SND_SOC_RT715_SDCA_SDW)     += snd-soc-rt715-sdca.o
 obj-$(CONFIG_SND_SOC_RT722_SDCA_SDW)     += snd-soc-rt722-sdca.o
 obj-$(CONFIG_SND_SOC_RT9120)	+= snd-soc-rt9120.o
+obj-$(CONFIG_SND_SOC_RTQ9128)	+= snd-soc-rtq9128.o
 obj-$(CONFIG_SND_SOC_SDW_MOCKUP)     += snd-soc-sdw-mockup.o
 obj-$(CONFIG_SND_SOC_SGTL5000)  += snd-soc-sgtl5000.o
 obj-$(CONFIG_SND_SOC_SIGMADSP)	+= snd-soc-sigmadsp.o
diff --git a/sound/soc/codecs/rtq9128.c b/sound/soc/codecs/rtq9128.c
new file mode 100644
index 000000000000..acae89c42c26
--- /dev/null
+++ b/sound/soc/codecs/rtq9128.c
@@ -0,0 +1,742 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2023 Richtek Technology Corp.
+ *
+ * Author: ChiYuan Huang <cy_huang@richtek.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+
+#define RTQ9128_REG_SDI_SEL	0x00
+#define RTQ9128_REG_SDO_SEL	0x01
+#define RTQ9128_REG_I2S_OPT	0x02
+#define RTQ9128_REG_MISC	0x03
+#define RTQ9128_REG_STATE_CTRL	0x04
+#define RTQ9128_REG_PLLTRI_GEN1	0x05
+#define RTQ9128_REG_PLLTRI_GEN2	0x06
+#define RTQ9128_REG_PWM_SS_OPT	0x07
+#define RTQ9128_REG_DSP_EN	0x08
+#define RTQ9128_REG_TDM_TX_CH1	0x21
+#define RTQ9128_REG_TDM_RX_CH1	0x25
+#define RTQ9128_REG_MS_VOL	0x30
+#define RTQ9128_REG_CH1_VOL	0x31
+#define RTQ9128_REG_CH2_VOL	0x32
+#define RTQ9128_REG_CH3_VOL	0x33
+#define RTQ9128_REG_CH4_VOL	0x34
+#define RTQ9128_REG_EFUSE_DATA	0xE0
+#define RTQ9128_REG_VENDOR_ID	0xF9
+
+#define RTQ9128_CHSTAT_VAL_MASK	GENMASK(1, 0)
+#define RTQ9128_DOLEN_MASK	GENMASK(7, 6)
+#define RTQ9128_AUDBIT_MASK	GENMASK(5, 4)
+#define RTQ9128_AUDFMT_MASK	GENMASK(3, 0)
+#define RTQ9128_MSMUTE_MASK	BIT(0)
+#define RTQ9128_DIE_CHECK_MASK	GENMASK(4, 0)
+#define RTQ9128_VENDOR_ID_MASK	GENMASK(19, 8)
+
+#define RTQ9128_SOFT_RESET_VAL	0x80
+#define RTQ9128_VENDOR_ID_VAL	0x470
+#define RTQ9128_ALLCH_HIZ_VAL	0x55
+#define RTQ9128_ALLCH_ULQM_VAL	0xFF
+#define RTQ9128_TKA470B_VAL	0
+#define RTQ9128_RTQ9128DH_VAL	0x0F
+#define RTQ9128_RTQ9128DL_VAL	0x10
+
+struct rtq9128_data {
+	struct gpio_desc *enable;
+	int tdm_slots;
+	int tdm_slot_width;
+};
+
+struct rtq9128_init_reg {
+	unsigned int reg;
+	unsigned int val;
+};
+
+static int rtq9128_get_reg_size(unsigned int reg)
+{
+	switch (reg) {
+	case 0x5C ... 0x6F:
+	case 0x98 ... 0x9F:
+	case 0xC0 ... 0xC3:
+	case 0xC8 ... 0xCF:
+	case 0xDF ... 0xE5:
+	case 0xF9:
+		return 4;
+	case 0x40 ... 0x4F:
+		return 3;
+	case 0x30 ... 0x35:
+	case 0x8C ... 0x97:
+	case 0xC4 ... 0xC7:
+	case 0xD7 ... 0xDA:
+		return 2;
+	default:
+		return 1;
+	}
+}
+
+static int rtq9128_i2c_write(void *context, const void *data, size_t count)
+{
+	struct device *dev = context;
+	struct i2c_client *i2c = to_i2c_client(dev);
+	u8 reg = *(u8 *)data;
+	int rg_size;
+
+	BUG_ON(count != 5);
+
+	rg_size = rtq9128_get_reg_size(reg);
+	return i2c_smbus_write_i2c_block_data(i2c, reg, rg_size, data + count - rg_size);
+}
+
+static int rtq9128_i2c_read(void *context, const void *reg_buf, size_t reg_size, void *val_buf,
+			    size_t val_size)
+{
+	struct device *dev = context;
+	struct i2c_client *i2c = to_i2c_client(dev);
+	u8 reg = *(u8 *)reg_buf;
+	u8 data_tmp[4] = {};
+	int rg_size, ret;
+
+	BUG_ON(reg_size != 1 || val_size != 4);
+
+	rg_size = rtq9128_get_reg_size(reg);
+	ret = i2c_smbus_read_i2c_block_data(i2c, reg, rg_size, data_tmp);
+	if (ret < 0)
+		return ret;
+	else if (ret != rg_size)
+		return -EIO;
+
+	memset(val_buf, 0, val_size - rg_size);
+	memcpy(val_buf + val_size - rg_size, data_tmp, rg_size);
+
+	return 0;
+}
+
+static const struct regmap_bus rtq9128_regmap_bus = {
+	.write = rtq9128_i2c_write,
+	.read = rtq9128_i2c_read,
+	.max_raw_read = 4,
+	.max_raw_write = 4,
+};
+
+static bool rtq9128_is_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x00 ... 0x2B:
+	case 0x30 ... 0x35:
+	case 0x40 ... 0x56:
+	case 0x5C ... 0x76:
+	case 0x80 ... 0xAD:
+	case 0xB0 ... 0xBA:
+	case 0xC0 ... 0xE5:
+	case 0xF0 ... 0xFB:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool rtq9128_is_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x00 ... 0x1F:
+	case 0x21 ... 0x2B:
+	case 0x30 ... 0x35:
+	case 0x40 ... 0x56:
+	case 0x5C ... 0x76:
+	case 0x80 ... 0x8B:
+	case 0xA0 ... 0xAD:
+	case 0xB0 ... 0xBA:
+	case 0xC0:
+	case 0xD0 ... 0xDE:
+	case 0xE0 ... 0xE5:
+	case 0xF0 ... 0xF3:
+	case 0xF6 ... 0xF8:
+	case 0xFA ... 0xFB:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool rtq9128_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x0F ... 0x17:
+	case 0x20:
+	case 0x53:
+	case 0x55:
+	case 0x5C ... 0x6F:
+	case 0x8C ... 0x9F:
+	case 0xC0 ... 0xCF:
+	case 0xDF:
+	case 0xF0 ... 0xF1:
+	case 0xF4 ... 0xF5:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config rtq9128_regmap_config = {
+	.name = "rtq9128",
+	.reg_bits = 8,
+	.val_bits = 32,
+	.val_format_endian = REGMAP_ENDIAN_BIG,
+	.cache_type = REGCACHE_RBTREE,
+
+	.readable_reg = rtq9128_is_readable_reg,
+	.writeable_reg = rtq9128_is_writeable_reg,
+	.volatile_reg = rtq9128_is_volatile_reg,
+	.num_reg_defaults_raw = RTQ9128_REG_VENDOR_ID + 1,
+};
+
+static const DECLARE_TLV_DB_SCALE(dig_tlv, -10375, 25, 0);
+
+static const DECLARE_TLV_DB_RANGE(spkgain_tlv,
+	0, 3, TLV_DB_SCALE_ITEM(-600, 600, 0),
+	4, 5, TLV_DB_SCALE_ITEM(1500, 300, 0),
+);
+
+static const char * const source_select_text[] = { "CH1", "CH2", "CH3", "CH4" };
+static const char * const pwmfreq_select_text[] = { "8fs", "10fs", "40fs", "44fs", "48fs" };
+static const char * const phase_select_text[] = {
+	"0 degree",	"45 degree",	"90 degree",	"135 degree",
+	"180 degree",	"225 degree",	"270 degree",	"315 degree",
+};
+
+static const struct soc_enum rtq9128_select_enum[] = {
+	SOC_ENUM_SINGLE(RTQ9128_REG_SDI_SEL, 6, ARRAY_SIZE(source_select_text), source_select_text),
+	SOC_ENUM_SINGLE(RTQ9128_REG_SDI_SEL, 4, ARRAY_SIZE(source_select_text), source_select_text),
+	SOC_ENUM_SINGLE(RTQ9128_REG_SDI_SEL, 2, ARRAY_SIZE(source_select_text), source_select_text),
+	SOC_ENUM_SINGLE(RTQ9128_REG_SDI_SEL, 0, ARRAY_SIZE(source_select_text), source_select_text),
+	SOC_ENUM_SINGLE(RTQ9128_REG_PLLTRI_GEN1, 4, ARRAY_SIZE(pwmfreq_select_text),
+			pwmfreq_select_text),
+	SOC_ENUM_SINGLE(RTQ9128_REG_PLLTRI_GEN1, 0, ARRAY_SIZE(phase_select_text),
+			phase_select_text),
+	SOC_ENUM_SINGLE(RTQ9128_REG_PLLTRI_GEN2, 4, ARRAY_SIZE(phase_select_text),
+			phase_select_text),
+	SOC_ENUM_SINGLE(RTQ9128_REG_PLLTRI_GEN2, 0, ARRAY_SIZE(phase_select_text),
+			phase_select_text),
+};
+
+static const struct snd_kcontrol_new rtq9128_snd_ctrls[] = {
+	SOC_SINGLE_TLV("MS Volume", RTQ9128_REG_MS_VOL, 2, 511, 1, dig_tlv),
+	SOC_SINGLE_TLV("CH1 Volume", RTQ9128_REG_CH1_VOL, 2, 511, 1, dig_tlv),
+	SOC_SINGLE_TLV("CH2 Volume", RTQ9128_REG_CH2_VOL, 2, 511, 1, dig_tlv),
+	SOC_SINGLE_TLV("CH3 Volume", RTQ9128_REG_CH3_VOL, 2, 511, 1, dig_tlv),
+	SOC_SINGLE_TLV("CH4 Volume", RTQ9128_REG_CH4_VOL, 2, 511, 1, dig_tlv),
+	SOC_SINGLE_TLV("SPK Gain Volume", RTQ9128_REG_MISC, 0, 5, 0, spkgain_tlv),
+	SOC_SINGLE("PBTL12 Switch", RTQ9128_REG_MISC, 5, 1, 0),
+	SOC_SINGLE("PBTL34 Switch", RTQ9128_REG_MISC, 4, 1, 0),
+	SOC_SINGLE("Spread Spectrum Switch", RTQ9128_REG_PWM_SS_OPT, 7, 1, 0),
+	SOC_SINGLE("SDO Select", RTQ9128_REG_SDO_SEL, 0, 15, 0),
+	SOC_ENUM("CH1 SI Select", rtq9128_select_enum[0]),
+	SOC_ENUM("CH2 SI Select", rtq9128_select_enum[1]),
+	SOC_ENUM("CH3 SI Select", rtq9128_select_enum[2]),
+	SOC_ENUM("CH4 SI Select", rtq9128_select_enum[3]),
+	SOC_ENUM("PWM FREQ Select", rtq9128_select_enum[4]),
+	SOC_ENUM("OUT2 Phase Select", rtq9128_select_enum[5]),
+	SOC_ENUM("OUT3 Phase Select", rtq9128_select_enum[6]),
+	SOC_ENUM("OUT4 Phase Select", rtq9128_select_enum[7]),
+};
+
+static int rtq9128_dac_power_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol,
+				   int event)
+{
+	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+	unsigned int shift, mask;
+	int ret;
+
+	dev_dbg(comp->dev, "%s: %s event %d\n", __func__, w->name, event);
+
+	if (strcmp(w->name, "DAC1") == 0)
+		shift = 6;
+	else if (strcmp(w->name, "DAC2") == 0)
+		shift = 4;
+	else if (strcmp(w->name, "DAC3") == 0)
+		shift = 2;
+	else
+		shift = 0;
+
+	mask = RTQ9128_CHSTAT_VAL_MASK << shift;
+
+	/* Turn channel state to Normal or HiZ */
+	ret = snd_soc_component_write_field(comp, RTQ9128_REG_STATE_CTRL, mask,
+					    event == SND_SOC_DAPM_POST_PMU ? 0 : 1);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * For each channel turns on, HW will trigger DC load detect and DC
+	 * offset calibration, the time is needed for all the actions done.
+	 */
+	if (event == SND_SOC_DAPM_POST_PMU)
+		msleep(25);
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget rtq9128_dapm_widgets[] = {
+	SND_SOC_DAPM_DAC_E("DAC1", NULL, SND_SOC_NOPM, 0, 0, rtq9128_dac_power_event,
+			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+	SND_SOC_DAPM_DAC_E("DAC2", NULL, SND_SOC_NOPM, 0, 0, rtq9128_dac_power_event,
+			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+	SND_SOC_DAPM_DAC_E("DAC3", NULL, SND_SOC_NOPM, 0, 0, rtq9128_dac_power_event,
+			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+	SND_SOC_DAPM_DAC_E("DAC4", NULL, SND_SOC_NOPM, 0, 0, rtq9128_dac_power_event,
+			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+	SND_SOC_DAPM_OUTPUT("OUT1"),
+	SND_SOC_DAPM_OUTPUT("OUT2"),
+	SND_SOC_DAPM_OUTPUT("OUT3"),
+	SND_SOC_DAPM_OUTPUT("OUT4"),
+};
+
+static const struct snd_soc_dapm_route rtq9128_dapm_routes[] = {
+	{ "DAC1", NULL, "Playback" },
+	{ "DAC2", NULL, "Playback" },
+	{ "DAC3", NULL, "Playback" },
+	{ "DAC4", NULL, "Playback" },
+	{ "OUT1", NULL, "DAC1" },
+	{ "OUT2", NULL, "DAC2" },
+	{ "OUT3", NULL, "DAC3" },
+	{ "OUT4", NULL, "DAC4" },
+	{ "Capture", NULL, "DAC1" },
+	{ "Capture", NULL, "DAC2" },
+	{ "Capture", NULL, "DAC3" },
+	{ "Capture", NULL, "DAC4" },
+};
+
+static const struct rtq9128_init_reg rtq9128_tka470b_tables[] = {
+	{ 0xA0, 0xEF },
+	{ 0x0D, 0x00 },
+	{ 0x03, 0x05 },
+	{ 0x05, 0x31 },
+	{ 0x06, 0x23 },
+	{ 0x70, 0x11 },
+	{ 0x75, 0x1F },
+	{ 0xB6, 0x03 },
+	{ 0xB9, 0x03 },
+	{ 0xB8, 0x03 },
+	{ 0xC1, 0xFF },
+	{ 0xF8, 0x72 },
+	{ 0x30, 0x180 },
+};
+
+static const struct rtq9128_init_reg rtq9128_dh_tables[] = {
+	{ 0x0F, 0x00 },
+	{ 0x03, 0x0D },
+	{ 0xB2, 0xFF },
+	{ 0xB3, 0xFF },
+	{ 0x30, 0x180 },
+	{ 0x8A, 0x55 },
+	{ 0x71, 0xC8 },
+	{ 0x72, 0x00 },
+	{ 0xB1, 0xE3 },
+};
+
+static const struct rtq9128_init_reg rtq9128_dl_tables[] = {
+	{ 0x0F, 0x00 },
+	{ 0x03, 0x0D },
+	{ 0x30, 0x180 },
+	{ 0x8A, 0x55 },
+	{ 0x71, 0xC8 },
+	{ 0x72, 0x00 },
+	{ 0xB1, 0xE3 },
+};
+
+static int rtq9128_component_probe(struct snd_soc_component *comp)
+{
+	const struct rtq9128_init_reg *table, *curr;
+	size_t table_size;
+	unsigned int val;
+	int i, ret;
+
+	pm_runtime_resume_and_get(comp->dev);
+
+	val = snd_soc_component_read(comp, RTQ9128_REG_EFUSE_DATA);
+
+	switch (FIELD_GET(RTQ9128_DIE_CHECK_MASK, val)) {
+	case RTQ9128_TKA470B_VAL:
+		table = rtq9128_tka470b_tables;
+		table_size = ARRAY_SIZE(rtq9128_tka470b_tables);
+		break;
+	case RTQ9128_RTQ9128DH_VAL:
+		table = rtq9128_dh_tables;
+		table_size = ARRAY_SIZE(rtq9128_dh_tables);
+		break;
+	default:
+		table = rtq9128_dl_tables;
+		table_size = ARRAY_SIZE(rtq9128_dl_tables);
+		break;
+	}
+
+	for (i = 0, curr = table; i < table_size; i++, curr++) {
+		ret = snd_soc_component_write(comp, curr->reg, curr->val);
+		if (ret < 0)
+			return ret;
+	}
+
+	pm_runtime_mark_last_busy(comp->dev);
+	pm_runtime_put(comp->dev);
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver rtq9128_comp_driver = {
+	.probe = rtq9128_component_probe,
+	.controls = rtq9128_snd_ctrls,
+	.num_controls = ARRAY_SIZE(rtq9128_snd_ctrls),
+	.dapm_widgets = rtq9128_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(rtq9128_dapm_widgets),
+	.dapm_routes = rtq9128_dapm_routes,
+	.num_dapm_routes = ARRAY_SIZE(rtq9128_dapm_routes),
+	.use_pmdown_time = 1,
+	.endianness = 1,
+};
+
+static int rtq9128_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct rtq9128_data *data = snd_soc_dai_get_drvdata(dai);
+	struct snd_soc_component *comp = dai->component;
+	struct device *dev = dai->dev;
+	unsigned int audfmt, fmtval;
+	int ret;
+
+	dev_dbg(dev, "%s: fmt 0x%8x\n", __func__, fmt);
+
+	/* Only support bitclock & framesync as consumer */
+	if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_BC_FC) {
+		dev_err(dev, "Only support BCK and LRCK as consumer\n");
+		return -EINVAL;
+	}
+
+	fmtval = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+	if (data->tdm_slots && fmtval != SND_SOC_DAIFMT_DSP_A && fmtval != SND_SOC_DAIFMT_DSP_B) {
+		dev_err(dev, "TDM is used, format only support DSP_A or DSP_B\n");
+		return -EINVAL;
+	}
+
+	switch (fmtval) {
+	case SND_SOC_DAIFMT_I2S:
+		audfmt = 8;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		audfmt = 9;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		audfmt = 10;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		audfmt = data->tdm_slots ? 12 : 11;
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		audfmt = data->tdm_slots ? 4 : 3;
+		break;
+	default:
+		dev_err(dev, "Unsupported format 0x%8x\n", fmt);
+		return -EINVAL;
+	}
+
+	ret = snd_soc_component_write_field(comp, RTQ9128_REG_I2S_OPT, RTQ9128_AUDFMT_MASK, audfmt);
+	return ret < 0 ? ret : 0;
+}
+
+static int rtq9128_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+				    unsigned int rx_mask, int slots, int slot_width)
+{
+	struct rtq9128_data *data = snd_soc_dai_get_drvdata(dai);
+	struct snd_soc_component *comp = dai->component;
+	struct device *dev = dai->dev;
+	unsigned int mask, start_loc;
+	int i, frame_length, ret;
+
+	dev_dbg(dev, "%s: slot %d slot_width %d, tx/rx mask 0x%x 0x%x\n", __func__, slots,
+		slot_width, tx_mask, rx_mask);
+
+	if (slots <= 0 || slot_width <= 0 || slot_width % 8) {
+		dev_err(dev, "Invalid slot numbers (%d) or width (%d)\n", slots, slot_width);
+		return -EINVAL;
+	}
+
+	/* HW supported maximum frame length 512 */
+	frame_length = slots * slot_width;
+	if (frame_length > 512) {
+		dev_err(dev, "frame length exceed the maximum (%d)\n", frame_length);
+		return -EINVAL;
+	}
+
+	if (!rx_mask || hweight_long(tx_mask) > slots || hweight_long(rx_mask) > slots ||
+	    fls(tx_mask) > slots || fls(rx_mask) > slots) {
+		dev_err(dev, "Invalid tx/rx mask (0x%x/0x%x)\n", tx_mask, rx_mask);
+		return -EINVAL;
+	}
+
+	for (mask = tx_mask, i = 0; i < 4 && mask; i++) {
+		start_loc = (ffs(mask) - 1) * slot_width / 8;
+		mask &= ~BIT(ffs(mask) - 1);
+
+		ret = snd_soc_component_write(comp, RTQ9128_REG_TDM_TX_CH1 + i, start_loc);
+		if (ret < 0) {
+			dev_err(dev, "Failed to assign tx_loc %d (%d)\n", i, ret);
+			return ret;
+		}
+	}
+
+	for (mask = rx_mask, i = 0; i < 4 && mask; i++) {
+		start_loc = (ffs(mask) - 1) * slot_width / 8;
+		mask &= ~BIT(ffs(mask) - 1);
+
+		ret = snd_soc_component_write(comp, RTQ9128_REG_TDM_RX_CH1 + i, start_loc);
+		if (ret < 0) {
+			dev_err(dev, "Failed to assign rx_loc %d (%d)\n", i, ret);
+			return ret;
+		}
+	}
+
+	data->tdm_slots = slots;
+	data->tdm_slot_width = slot_width;
+
+	return 0;
+}
+
+static int rtq9128_dai_hw_params(struct snd_pcm_substream *stream, struct snd_pcm_hw_params *param,
+				 struct snd_soc_dai *dai)
+{
+	struct rtq9128_data *data = snd_soc_dai_get_drvdata(dai);
+	unsigned int width, slot_width, bitrate, audbit, dolen;
+	struct snd_soc_component *comp = dai->component;
+	struct device *dev = dai->dev;
+	int ret;
+
+	dev_dbg(dev, "%s: width %d\n", __func__, params_width(param));
+
+	switch (width = params_width(param)) {
+	case 16:
+		audbit = 0;
+		break;
+	case 18:
+		audbit = 1;
+		break;
+	case 20:
+		audbit = 2;
+		break;
+	case 24:
+	case 32:
+		audbit = 3;
+		break;
+	default:
+		dev_err(dev, "Unsupported width (%d)\n", width);
+		return -EINVAL;
+	}
+
+	slot_width = params_physical_width(param);
+
+	if (data->tdm_slots) {
+		if (slot_width > data->tdm_slot_width) {
+			dev_err(dev, "slot width is larger than TDM slot width\n");
+			return -EINVAL;
+		}
+
+		/* Check BCK not exceed the maximum supported rate 24.576MHz */
+		bitrate = data->tdm_slots * data->tdm_slot_width * params_rate(param);
+		if (bitrate > 24576000) {
+			dev_err(dev, "bitrate exceed the maximum (%d)\n", bitrate);
+			return -EINVAL;
+		}
+
+		/* If TDM is used, configure slot width as TDM slot witdh */
+		slot_width = data->tdm_slot_width;
+	}
+
+	switch (slot_width) {
+	case 16:
+		dolen = 0;
+		break;
+	case 24:
+		dolen = 1;
+		break;
+	case 32:
+		dolen = 2;
+		break;
+	default:
+		dev_err(dev, "Unsupported slot width (%d)\n", slot_width);
+		return -EINVAL;
+	}
+
+	ret = snd_soc_component_write_field(comp, RTQ9128_REG_I2S_OPT, RTQ9128_AUDBIT_MASK, audbit);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_component_write_field(comp, RTQ9128_REG_SDO_SEL, RTQ9128_DOLEN_MASK, dolen);
+	return ret < 0 ? ret : 0;
+}
+
+static int rtq9128_dai_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
+{
+	struct snd_soc_component *comp = dai->component;
+	struct device *dev = dai->dev;
+	int ret;
+
+	dev_dbg(dev, "%s: mute (%d), stream (%d)\n", __func__, mute, stream);
+
+	ret = snd_soc_component_write_field(comp, RTQ9128_REG_DSP_EN, RTQ9128_MSMUTE_MASK,
+					    mute ? 1 : 0);
+	return ret < 0 ? ret : 0;
+}
+
+static const struct snd_soc_dai_ops rtq9128_dai_ops = {
+	.set_fmt = rtq9128_dai_set_fmt,
+	.set_tdm_slot = rtq9128_dai_set_tdm_slot,
+	.hw_params = rtq9128_dai_hw_params,
+	.mute_stream = rtq9128_dai_mute_stream,
+	.no_capture_mute = 1,
+};
+
+#define RTQ9128_FMTS_MASK	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |\
+				 SNDRV_PCM_FMTBIT_S20_LE | SNDRV_PCM_FMTBIT_S24_LE |\
+				 SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_soc_dai_driver rtq9128_dai = {
+	.name = "rtq9128-aif",
+	.playback = {
+		.stream_name = "Playback",
+		.rates = SNDRV_PCM_RATE_8000_192000,
+		.formats = RTQ9128_FMTS_MASK,
+		.channels_min = 1,
+		.channels_max = 4,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.rates = SNDRV_PCM_RATE_8000_192000,
+		.formats = RTQ9128_FMTS_MASK,
+		.channels_min = 1,
+		.channels_max = 4,
+	},
+	.ops = &rtq9128_dai_ops,
+	.symmetric_rate = 1,
+	.symmetric_sample_bits = 1,
+};
+
+static int rtq9128_probe(struct i2c_client *i2c)
+{
+	struct device *dev = &i2c->dev;
+	struct rtq9128_data *data;
+	struct regmap *regmap;
+	unsigned int venid;
+	int ret;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH);
+	if (IS_ERR(data->enable))
+		return dev_err_probe(dev, PTR_ERR(data->enable), "Failed to get 'enable' gpio\n");
+	else if (data->enable)
+		usleep_range(10000, 11000);
+
+	i2c_set_clientdata(i2c, data);
+
+	/*
+	 * Due to the bad design to combine SOFT_RESET bit with other function,
+	 * directly use generic i2c API to trigger SOFT_RESET.
+	 */
+	ret = i2c_smbus_write_byte_data(i2c, RTQ9128_REG_MISC, RTQ9128_SOFT_RESET_VAL);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to trigger software reset\n");
+
+	/* After trigger soft reset, have to wait 10ms for digital reset done */
+	usleep_range(10000, 11000);
+
+	regmap = devm_regmap_init(dev, &rtq9128_regmap_bus, dev, &rtq9128_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
+
+	ret = regmap_read(regmap, RTQ9128_REG_VENDOR_ID, &venid);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get vendor id\n");
+
+	venid = FIELD_GET(RTQ9128_VENDOR_ID_MASK, venid);
+	if (venid != RTQ9128_VENDOR_ID_VAL)
+		return dev_err_probe(dev, -ENODEV, "Vendor ID not match (0x%x)\n", venid);
+
+	pm_runtime_set_active(dev);
+	pm_runtime_mark_last_busy(dev);
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to enable pm runtime\n");
+
+	return devm_snd_soc_register_component(dev, &rtq9128_comp_driver, &rtq9128_dai, 1);
+}
+
+static int __maybe_unused rtq9128_pm_runtime_suspend(struct device *dev)
+{
+	struct rtq9128_data *data = dev_get_drvdata(dev);
+	struct regmap *regmap = dev_get_regmap(dev, NULL);
+
+	/* If 'enable' gpio not specified, change all channels to ultra low quiescent */
+	if (!data->enable)
+		return regmap_write(regmap, RTQ9128_REG_STATE_CTRL, RTQ9128_ALLCH_ULQM_VAL);
+
+	gpiod_set_value_cansleep(data->enable, 0);
+
+	regcache_cache_only(regmap, true);
+	regcache_mark_dirty(regmap);
+
+	return 0;
+}
+
+static int __maybe_unused rtq9128_pm_runtime_resume(struct device *dev)
+{
+	struct rtq9128_data *data = dev_get_drvdata(dev);
+	struct regmap *regmap = dev_get_regmap(dev, NULL);
+
+	/* If 'enable' gpio not specified, change all channels to default Hi-Z */
+	if (!data->enable)
+		return regmap_write(regmap, RTQ9128_REG_STATE_CTRL, RTQ9128_ALLCH_HIZ_VAL);
+
+	gpiod_set_value_cansleep(data->enable, 1);
+
+	/* Wait digital block to be ready */
+	usleep_range(10000, 11000);
+
+	regcache_cache_only(regmap, false);
+	return regcache_sync(regmap);
+}
+
+static const struct dev_pm_ops __maybe_unused rtq9128_pm_ops = {
+	SET_RUNTIME_PM_OPS(rtq9128_pm_runtime_suspend, rtq9128_pm_runtime_resume, NULL)
+};
+
+static const struct of_device_id rtq9128_device_table[] = {
+	{ .compatible = "richtek,rtq9128" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rtq9128_device_table);
+
+static struct i2c_driver rtq9128_driver = {
+	.driver = {
+		.name = "rtq9128",
+		.of_match_table = rtq9128_device_table,
+		.pm = pm_ptr(&rtq9128_pm_ops),
+	},
+	.probe = rtq9128_probe,
+};
+module_i2c_driver(rtq9128_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("RTQ9128 4CH Audio Amplifier Driver");
+MODULE_LICENSE("GPL");
-- 
2.34.1