ASoC: starfive: Add StarFive JH7100 audio drivers

Signed-off-by: Michael Yan <michael.yan@starfivetech.com>
Signed-off-by: Jenny Zhang <jenny.zhang@starfivetech.com>
Signed-off-by: Walker Chen <walker.chen@starfivetech.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
[geertu: convert not to use asoc_xxx()]
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>

15 files changed, 4182 insertions, 0 deletions

diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index 775bb38c2ed4..14b02dc64b6f 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_SND_SOC)	+= pxa/
 obj-$(CONFIG_SND_SOC)	+= qcom/
 obj-$(CONFIG_SND_SOC)	+= rockchip/
 obj-$(CONFIG_SND_SOC)	+= samsung/
+obj-$(CONFIG_SND_SOC)	+= starfive/
 obj-$(CONFIG_SND_SOC)	+= sh/
 obj-$(CONFIG_SND_SOC)	+= sof/
 obj-$(CONFIG_SND_SOC)	+= spear/
diff --git a/sound/soc/starfive/Kconfig b/sound/soc/starfive/Kconfig
index 279ac5c1d309..b87f30cd4174 100644
--- a/sound/soc/starfive/Kconfig
+++ b/sound/soc/starfive/Kconfig
@@ -22,3 +22,59 @@ config SND_SOC_JH7110_TDM
 	select SND_SOC_GENERIC_DMAENGINE_PCM
 	help
 	  Say Y or M if you want to add support for StarFive TDM driver.
+
+config SND_STARFIVE_SPDIF
+	tristate "starfive spdif"
+	depends on SOC_STARFIVE || COMPILE_TEST
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	select REGMAP_MMIO
+	help
+	  Say Y or M if you want to add support for codecs attached to the
+	  I2S interface on VIC vic_starlight board. You will also need to select
+	  the drivers for the rest of VIC audio subsystem.
+
+config SND_STARFIVE_SPDIF_PCM
+	bool "PCM PIO extension for spdif driver"
+	depends on SND_STARFIVE_SPDIF
+	help
+	 Say Y or N if you want to add a custom ALSA extension that registers
+	 a PCM and uses PIO to transfer data.
+
+config SND_STARFIVE_PWMDAC
+	tristate "starfive pwmdac Device Driver"
+	depends on SOC_STARFIVE || COMPILE_TEST
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	help
+	 Say Y or M if you want to add support for sf pwmdac driver.
+
+config SND_STARFIVE_PWMDAC_PCM
+	bool "PCM PIO extension for pwmdac driver"
+	depends on SND_STARFIVE_PWMDAC
+	help
+	 Say Y or N if you want to add a custom ALSA extension that registers
+	 a PCM and uses PIO to transfer data.
+
+config SND_STARFIVE_PDM
+	tristate "starfive pdm Device Driver"
+	depends on SOC_STARFIVE || COMPILE_TEST
+	select REGMAP_MMIO
+	help
+	 Say Y or M if you want to add support for sf pdm driver.
+
+config SND_STARFIVE_I2SVAD
+	tristate "starfive I2SVAD Device Driver"
+	depends on SOC_STARFIVE || COMPILE_TEST
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	help
+	 Say Y or M if you want to add support for I2SVAD driver for
+	 starfive I2SVAD device.
+
+config SND_STARFIVE_I2SVAD_PCM
+	bool "PCM PIO extension for I2SVAD driver"
+	depends on SND_STARFIVE_I2SVAD
+	help
+	 Say Y or N if you want to add a custom ALSA extension that registers
+	 a PCM and uses PIO to transfer data.
+
+	 This functionality is specially suited for I2SVAD devices that don't have
+	 DMA support.
diff --git a/sound/soc/starfive/Makefile b/sound/soc/starfive/Makefile
index 9e958f70ef51..8da7a814f68a 100644
--- a/sound/soc/starfive/Makefile
+++ b/sound/soc/starfive/Makefile
@@ -1,3 +1,24 @@
 # StarFive Platform Support
 obj-$(CONFIG_SND_SOC_JH7110_PWMDAC) += jh7110_pwmdac.o
 obj-$(CONFIG_SND_SOC_JH7110_TDM) += jh7110_tdm.o
+
+snd-soc-starfive-spdif-y := spdif.o
+snd-soc-starfive-spdif-$(CONFIG_SND_STARFIVE_SPDIF_PCM) += spdif-pcm.o
+
+obj-$(CONFIG_SND_STARFIVE_SPDIF) += snd-soc-starfive-spdif.o
+
+snd-soc-starfive-pwmdac-y := pwmdac.o
+snd-soc-starfive-pwmdac-$(CONFIG_SND_STARFIVE_PWMDAC_PCM) += pwmdac-pcm.o
+snd-soc-starfive-pwmdac-transmitter-y := pwmdac-transmitter.o
+
+obj-$(CONFIG_SND_STARFIVE_PWMDAC) += snd-soc-starfive-pwmdac.o
+obj-$(CONFIG_SND_STARFIVE_PWMDAC) += snd-soc-starfive-pwmdac-transmitter.o
+
+snd-soc-starfive-pdm-y := pdm.o
+
+obj-$(CONFIG_SND_STARFIVE_PDM) += snd-soc-starfive-pdm.o
+
+snd-soc-starfive-i2svad-y := i2svad.o
+snd-soc-starfive-i2svad-$(CONFIG_SND_STARFIVE_I2SVAD_PCM) += i2svad-pcm.o
+
+obj-$(CONFIG_SND_STARFIVE_I2SVAD) += snd-soc-starfive-i2svad.o
diff --git a/sound/soc/starfive/i2svad-pcm.c b/sound/soc/starfive/i2svad-pcm.c
new file mode 100644
index 000000000000..6f799bf5b80b
--- /dev/null
+++ b/sound/soc/starfive/i2svad-pcm.c
@@ -0,0 +1,249 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#include <linux/io.h>
+#include <linux/rcupdate.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#include "i2svad.h"
+
+#define BUFFER_BYTES_MAX	(3 * 2 * 8 * PERIOD_BYTES_MIN)
+#define PERIOD_BYTES_MIN	4096
+#define PERIODS_MIN		2
+
+#define i2svad_pcm_tx_fn(sample_bits) \
+static unsigned int i2svad_pcm_tx_##sample_bits(struct i2svad_dev *dev, \
+		struct snd_pcm_runtime *runtime, unsigned int tx_ptr, \
+		bool *period_elapsed) \
+{ \
+	const u##sample_bits (*p)[2] = (void *)runtime->dma_area; \
+	unsigned int period_pos = tx_ptr % runtime->period_size; \
+	int i; \
+\
+	for (i = 0; i < dev->fifo_th; i++) { \
+		iowrite32(p[tx_ptr][0], dev->i2s_base + LRBR_LTHR(0)); \
+		iowrite32(p[tx_ptr][1], dev->i2s_base + RRBR_RTHR(0)); \
+		period_pos++; \
+		if (++tx_ptr >= runtime->buffer_size) \
+			tx_ptr = 0; \
+	} \
+	*period_elapsed = period_pos >= runtime->period_size; \
+	return tx_ptr; \
+}
+
+#define i2svad_pcm_rx_fn(sample_bits) \
+static unsigned int i2svad_pcm_rx_##sample_bits(struct i2svad_dev *dev, \
+		struct snd_pcm_runtime *runtime, unsigned int rx_ptr, \
+		bool *period_elapsed) \
+{ \
+	u##sample_bits (*p)[2] = (void *)runtime->dma_area; \
+	unsigned int period_pos = rx_ptr % runtime->period_size; \
+	int i; \
+\
+	for (i = 0; i < dev->fifo_th; i++) { \
+		p[rx_ptr][0] = ioread32(dev->i2s_base + LRBR_LTHR(0)); \
+		p[rx_ptr][1] = ioread32(dev->i2s_base + RRBR_RTHR(0)); \
+		period_pos++; \
+		if (++rx_ptr >= runtime->buffer_size) \
+			rx_ptr = 0; \
+	} \
+	*period_elapsed = period_pos >= runtime->period_size; \
+	return rx_ptr; \
+}
+
+i2svad_pcm_tx_fn(16);
+i2svad_pcm_rx_fn(16);
+
+#undef i2svad_pcm_tx_fn
+#undef i2svad_pcm_rx_fn
+
+static const struct snd_pcm_hardware i2svad_pcm_hardware = {
+	.info = SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_BLOCK_TRANSFER,
+	.rates = SNDRV_PCM_RATE_32000 |
+		SNDRV_PCM_RATE_44100 |
+		SNDRV_PCM_RATE_48000,
+	.rate_min = 32000,
+	.rate_max = 48000,
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.channels_min = 2,
+	.channels_max = 2,
+	.buffer_bytes_max = BUFFER_BYTES_MAX,
+	.period_bytes_min = PERIOD_BYTES_MIN,
+	.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN,
+	.periods_min = PERIODS_MIN,
+	.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN,
+	.fifo_size = 16,
+};
+
+static void i2svad_pcm_transfer(struct i2svad_dev *dev, bool push)
+{
+	struct snd_pcm_substream *substream;
+	bool active, period_elapsed;
+
+	rcu_read_lock();
+	if (push)
+		substream = rcu_dereference(dev->tx_substream);
+	else
+		substream = rcu_dereference(dev->rx_substream);
+	active = substream && snd_pcm_running(substream);
+	if (active) {
+		unsigned int ptr;
+		unsigned int new_ptr;
+
+		if (push) {
+			ptr = READ_ONCE(dev->tx_ptr);
+			new_ptr = dev->tx_fn(dev, substream->runtime, ptr,
+					&period_elapsed);
+			cmpxchg(&dev->tx_ptr, ptr, new_ptr);
+		} else {
+			ptr = READ_ONCE(dev->rx_ptr);
+			new_ptr = dev->rx_fn(dev, substream->runtime, ptr,
+					&period_elapsed);
+			cmpxchg(&dev->rx_ptr, ptr, new_ptr);
+		}
+
+		if (period_elapsed)
+			snd_pcm_period_elapsed(substream);
+	}
+	rcu_read_unlock();
+}
+
+void i2svad_pcm_push_tx(struct i2svad_dev *dev)
+{
+	i2svad_pcm_transfer(dev, true);
+}
+
+void i2svad_pcm_pop_rx(struct i2svad_dev *dev)
+{
+	i2svad_pcm_transfer(dev, false);
+}
+
+static int i2svad_pcm_open(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
+	struct i2svad_dev *dev = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0));
+
+	snd_soc_set_runtime_hwparams(substream, &i2svad_pcm_hardware);
+	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+	runtime->private_data = dev;
+
+	return 0;
+}
+
+static int i2svad_pcm_close(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream)
+{
+	synchronize_rcu();
+	return 0;
+}
+
+static int i2svad_pcm_hw_params(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream,
+			struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct i2svad_dev *dev = runtime->private_data;
+
+	switch (params_channels(hw_params)) {
+	case 2:
+		break;
+	default:
+		dev_err(dev->dev, "invalid channels number\n");
+		return -EINVAL;
+	}
+
+	switch (params_format(hw_params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		dev->tx_fn = i2svad_pcm_tx_16;
+		dev->rx_fn = i2svad_pcm_rx_16;
+		break;
+	default:
+		dev_err(dev->dev, "invalid format\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int i2svad_pcm_trigger(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream, int cmd)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct i2svad_dev *dev = runtime->private_data;
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			WRITE_ONCE(dev->tx_ptr, 0);
+			rcu_assign_pointer(dev->tx_substream, substream);
+		} else {
+			WRITE_ONCE(dev->rx_ptr, 0);
+			rcu_assign_pointer(dev->rx_substream, substream);
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			rcu_assign_pointer(dev->tx_substream, NULL);
+		else
+			rcu_assign_pointer(dev->rx_substream, NULL);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static snd_pcm_uframes_t i2svad_pcm_pointer(struct snd_soc_component *component,
+					struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct i2svad_dev *dev = runtime->private_data;
+	snd_pcm_uframes_t pos;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		pos = READ_ONCE(dev->tx_ptr);
+	else
+		pos = READ_ONCE(dev->rx_ptr);
+
+	return pos < runtime->buffer_size ? pos : 0;
+}
+
+static int i2svad_pcm_new(struct snd_soc_component *component,
+			struct snd_soc_pcm_runtime *rtd)
+{
+	size_t size = i2svad_pcm_hardware.buffer_bytes_max;
+
+	snd_pcm_set_managed_buffer_all(rtd->pcm,
+			SNDRV_DMA_TYPE_CONTINUOUS,
+			NULL, size, size);
+	return 0;
+}
+
+static const struct snd_soc_component_driver i2svad_pcm_component = {
+	.open		= i2svad_pcm_open,
+	.close		= i2svad_pcm_close,
+	.hw_params	= i2svad_pcm_hw_params,
+	.trigger	= i2svad_pcm_trigger,
+	.pointer	= i2svad_pcm_pointer,
+	.pcm_construct	= i2svad_pcm_new,
+};
+
+int i2svad_pcm_register(struct platform_device *pdev)
+{
+	return devm_snd_soc_register_component(&pdev->dev, &i2svad_pcm_component,
+					NULL, 0);
+}
diff --git a/sound/soc/starfive/i2svad.c b/sound/soc/starfive/i2svad.c
new file mode 100644
index 000000000000..f8d0f894f26f
--- /dev/null
+++ b/sound/soc/starfive/i2svad.c
@@ -0,0 +1,1041 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <sound/designware_i2s.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+#include <linux/kthread.h>
+
+#include "i2svad.h"
+
+/* vad control function*/
+static void vad_start(struct vad_params *vad)
+{
+	regmap_update_bits(vad->vad_map, VAD_MEM_SW,
+			VAD_MEM_SW_MASK, VAD_MEM_SW_TO_VAD);
+	regmap_update_bits(vad->vad_map, VAD_SW,
+			VAD_SW_MASK, VAD_SW_VAD_XMEM_ENABLE|VAD_SW_ADC_ENABLE);
+	regmap_update_bits(vad->vad_map, VAD_SPINT_EN,
+			VAD_SPINT_EN_MASK, VAD_SPINT_EN_ENABLE);
+	regmap_update_bits(vad->vad_map, VAD_SLINT_EN,
+			VAD_SLINT_EN_MASK, VAD_SLINT_EN_ENABLE);
+}
+
+static void vad_stop(struct vad_params *vad)
+{
+	regmap_update_bits(vad->vad_map, VAD_SPINT_EN,
+			VAD_SPINT_EN_MASK, VAD_SLINT_EN_DISABLE);
+	regmap_update_bits(vad->vad_map, VAD_SLINT_EN,
+			VAD_SLINT_EN_MASK, VAD_SLINT_EN_DISABLE);
+	regmap_update_bits(vad->vad_map, VAD_SW,
+			VAD_SW_MASK, VAD_SW_VAD_XMEM_DISABLE|VAD_SW_ADC_DISABLE);
+	regmap_update_bits(vad->vad_map, VAD_MEM_SW,
+			VAD_MEM_SW_MASK, VAD_MEM_SW_TO_AXI);
+}
+
+static void vad_status(struct vad_params *vad)
+{
+	u32 sp_value,sp_en;
+	u32 sl_value,sl_en;
+
+	regmap_read(vad->vad_map, VAD_SPINT,&sp_value);
+	regmap_read(vad->vad_map, VAD_SPINT_EN,&sp_en);
+	if (sp_value&sp_en){
+		regmap_update_bits(vad->vad_map, VAD_SPINT_CLR,
+				VAD_SPINT_CLR_MASK, VAD_SPINT_CLR_VAD_SPINT);
+		vad->vstatus = VAD_STATUS_SPINT;
+		vad_stop(vad);
+		vad_start(vad);
+	}
+
+	regmap_read(vad->vad_map, VAD_SLINT,&sl_value);
+	regmap_read(vad->vad_map, VAD_SLINT_EN,&sl_en);
+	if (sl_value&sl_en){
+		regmap_update_bits(vad->vad_map, VAD_SLINT_CLR,
+				VAD_SLINT_CLR_MASK, VAD_SLINT_CLR_VAD_SLINT);
+		vad->vstatus = VAD_STATUS_SLINT;
+	}
+}
+
+static int vad_trigger(struct vad_params *vad,int cmd)
+{
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if(vad->vswitch)
+		{
+			vad_start(vad);
+		}
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		vad_stop(vad);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static void vad_init(struct vad_params *vad)
+{
+	/* left_margin */
+	regmap_update_bits(vad->vad_map, VAD_LEFT_MARGIN,
+			VAD_LEFT_MARGIN_MASK, 0x0);
+	/* right_margin */
+	regmap_update_bits(vad->vad_map, VAD_RIGHT_MARGIN,
+			VAD_RIGHT_MARGIN_MASK, 0x0);
+	/*low-energy transition range threshold ——NL*/
+	regmap_update_bits(vad->vad_map, VAD_N_LOW_CONT_FRAMES,
+			VAD_N_LOW_CONT_FRAMES_MASK, 0x3);
+	/* low-energy transition range */
+	regmap_update_bits(vad->vad_map, VAD_N_LOW_SEEK_FRAMES,
+			VAD_N_LOW_SEEK_FRAMES_MASK, 0x8);
+	/* high-energy transition range threshold——NH */
+	regmap_update_bits(vad->vad_map, VAD_N_HIGH_CONT_FRAMES,
+			VAD_N_HIGH_CONT_FRAMES_MASK, 0x5);
+	/* high-energy transition range */
+	regmap_update_bits(vad->vad_map, VAD_N_HIGH_SEEK_FRAMES,
+			VAD_N_HIGH_SEEK_FRAMES_MASK, 0x1E);
+	/*low-energy voice range threshold——NVL*/
+	regmap_update_bits(vad->vad_map, VAD_N_SPEECH_LOW_HIGH_FRAMES,
+			VAD_N_SPEECH_LOW_HIGH_FRAMES_MASK, 0x2);
+	/*low-energy voice range*/
+	regmap_update_bits(vad->vad_map, VAD_N_SPEECH_LOW_SEEK_FRAMES,
+			VAD_N_SPEECH_LOW_SEEK_FRAMES_MASK, 0x12);
+	/*mean silence frame range*/
+	regmap_update_bits(vad->vad_map, VAD_MEAN_SIL_FRAMES,
+			VAD_MEAN_SIL_FRAMES_MASK, 0xA);
+	/*low-energy threshold scaling factor,12bit(0~0xFFF)*/
+	regmap_update_bits(vad->vad_map, VAD_N_ALPHA,
+			VAD_N_ALPHA_MASK, 0x1A);
+	/*high-energy threshold scaling factor,12bit(0~0xFFF)*/
+	regmap_update_bits(vad->vad_map, VAD_N_BETA,
+			VAD_N_BETA_MASK, 0x34);
+	regmap_update_bits(vad->vad_map, VAD_LEFT_WD,
+			VAD_LEFT_WD_MASK, VAD_LEFT_WD_BIT_15_0);
+	regmap_update_bits(vad->vad_map, VAD_RIGHT_WD,
+			VAD_RIGHT_WD_MASK, VAD_RIGHT_WD_BIT_15_0);
+	regmap_update_bits(vad->vad_map, VAD_LR_SEL,
+			VAD_LR_SEL_MASK, VAD_LR_SEL_L);
+	regmap_update_bits(vad->vad_map, VAD_STOP_DELAY,
+			VAD_STOP_DELAY_MASK, VAD_STOP_DELAY_0_SAMPLE);
+	regmap_update_bits(vad->vad_map, VAD_ADDR_START,
+			VAD_ADDR_START_MASK, 0x0);
+	regmap_update_bits(vad->vad_map, VAD_ADDR_WRAP,
+			VAD_ADDR_WRAP_MASK, 0x2000);
+	regmap_update_bits(vad->vad_map, VAD_MEM_SW,
+			VAD_MEM_SW_MASK, VAD_MEM_SW_TO_AXI);
+	regmap_update_bits(vad->vad_map, VAD_SPINT_CLR,
+			VAD_SPINT_CLR_MASK, VAD_SPINT_CLR_VAD_SPINT);
+	regmap_update_bits(vad->vad_map, VAD_SLINT_CLR,
+			VAD_SLINT_CLR_MASK, VAD_SLINT_CLR_VAD_SLINT);
+}
+
+
+static int vad_switch_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 1;
+
+	return 0;
+}
+
+static int vad_switch_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct i2svad_dev *dev = snd_soc_component_get_drvdata(component);
+
+	ucontrol->value.integer.value[0] = dev->vad.vswitch;
+
+	return 0;
+}
+
+static int vad_switch_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct i2svad_dev *dev = snd_soc_component_get_drvdata(component);
+	int val;
+
+	val = ucontrol->value.integer.value[0];
+	if (val && !dev->vad.vswitch) {
+		dev->vad.vswitch = true;
+	} else if (!val && dev->vad.vswitch) {
+		dev->vad.vswitch = false;
+		vad_stop(&(dev->vad));
+	}
+
+	return 0;
+}
+
+
+static int vad_status_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 2;
+
+	return 0;
+}
+
+static int vad_status_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct i2svad_dev *dev = snd_soc_component_get_drvdata(component);
+
+	ucontrol->value.integer.value[0] = dev->vad.vstatus;
+	dev->vad.vstatus = VAD_STATUS_NORMAL;
+
+	return 0;
+}
+
+
+#define SOC_VAD_SWITCH_DECL(xname) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+	.info = vad_switch_info, .get = vad_switch_get, \
+	.put = vad_switch_put, }
+
+#define SOC_VAD_STATUS_DECL(xname) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+	.info = vad_status_info, .get = vad_status_get, }
+
+
+static const struct snd_kcontrol_new vad_snd_controls[] = {
+	SOC_VAD_SWITCH_DECL("vad switch"),
+	SOC_VAD_STATUS_DECL("vad status"),
+};
+
+static int vad_probe(struct snd_soc_component *component)
+{
+	struct i2svad_dev *priv = snd_soc_component_get_drvdata(component);
+
+	snd_soc_component_init_regmap(component, priv->vad.vad_map);
+	snd_soc_add_component_controls(component, vad_snd_controls,
+				ARRAY_SIZE(vad_snd_controls));
+
+	return 0;
+}
+
+/* i2s control function*/
+static inline void i2s_write_reg(void __iomem *io_base, int reg, u32 val)
+{
+	writel(val, io_base + reg);
+}
+
+static inline u32 i2s_read_reg(void __iomem *io_base, int reg)
+{
+	return readl(io_base + reg);
+}
+
+static inline void i2s_disable_channels(struct i2svad_dev *dev, u32 stream)
+{
+	u32 i = 0;
+
+	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		for (i = 0; i < ALL_CHANNEL_NUM; i++)
+			i2s_write_reg(dev->i2s_base, TER(i), 0);
+	} else {
+		for (i = 0; i < ALL_CHANNEL_NUM; i++)
+			i2s_write_reg(dev->i2s_base, RER(i), 0);
+	}
+}
+
+static inline void i2s_clear_irqs(struct i2svad_dev *dev, u32 stream)
+{
+	u32 i = 0;
+
+	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		for (i = 0; i < ALL_CHANNEL_NUM; i++)
+			i2s_read_reg(dev->i2s_base, TOR(i));
+	} else {
+		for (i = 0; i < ALL_CHANNEL_NUM; i++)
+			i2s_read_reg(dev->i2s_base, ROR(i));
+	}
+}
+
+static inline void i2s_disable_irqs(struct i2svad_dev *dev, u32 stream,
+				int chan_nr)
+{
+	u32 i, irq;
+
+	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		for (i = 0; i < (chan_nr / 2); i++) {
+			irq = i2s_read_reg(dev->i2s_base, IMR(i));
+			i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30);
+		}
+	} else {
+		for (i = 0; i < (chan_nr / 2); i++) {
+			irq = i2s_read_reg(dev->i2s_base, IMR(i));
+			i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03);
+		}
+	}
+}
+
+static inline void i2s_enable_irqs(struct i2svad_dev *dev, u32 stream,
+				int chan_nr)
+{
+	u32 i, irq;
+
+	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		for (i = 0; i < (chan_nr / 2); i++) {
+			irq = i2s_read_reg(dev->i2s_base, IMR(i));
+			i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x30);
+		}
+	} else {
+		for (i = 0; i < (chan_nr / 2); i++) {
+			irq = i2s_read_reg(dev->i2s_base, IMR(i));
+			i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x03);
+		}
+	}
+}
+
+static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
+{
+	struct i2svad_dev *dev = dev_id;
+	bool irq_valid = false;
+	u32 isr[4];
+	int i;
+
+	for (i = 0; i < ALL_CHANNEL_NUM; i++)
+		isr[i] = i2s_read_reg(dev->i2s_base, ISR(i));
+
+	i2s_clear_irqs(dev, SNDRV_PCM_STREAM_PLAYBACK);
+	i2s_clear_irqs(dev, SNDRV_PCM_STREAM_CAPTURE);
+
+	for (i = 0; i < 4; i++) {
+		/*
+		 * Check if TX fifo is empty. If empty fill FIFO with samples
+		 * NOTE: Only two channels supported
+		 */
+		if ((isr[i] & ISR_TXFE) && (i == 0) && dev->use_pio) {
+			i2svad_pcm_push_tx(dev);
+			irq_valid = true;
+		}
+
+		/*
+		 * Data available. Retrieve samples from FIFO
+		 * NOTE: Only two channels supported
+		 */
+		if ((isr[i] & ISR_RXDA) && (i == 0) && dev->use_pio) {
+			i2svad_pcm_pop_rx(dev);
+			irq_valid = true;
+		}
+
+		/* Error Handling: TX */
+		if (isr[i] & ISR_TXFO) {
+			//dev_err(dev->dev, "TX overrun (ch_id=%d)\n", i);
+			irq_valid = true;
+		}
+
+		/* Error Handling: TX */
+		if (isr[i] & ISR_RXFO) {
+			//dev_err(dev->dev, "RX overrun (ch_id=%d)\n", i);
+			irq_valid = true;
+		}
+	}
+
+	vad_status(&(dev->vad));
+
+	if (irq_valid)
+		return IRQ_HANDLED;
+	else
+		return IRQ_NONE;
+}
+
+static void i2s_start(struct i2svad_dev *dev,
+			struct snd_pcm_substream *substream)
+{
+	struct i2s_clk_config_data *config = &dev->config;
+
+	i2s_write_reg(dev->i2s_base, IER, 1);
+	i2s_enable_irqs(dev, substream->stream, config->chan_nr);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		i2s_write_reg(dev->i2s_base, ITER, 1);
+	else
+		i2s_write_reg(dev->i2s_base, IRER, 1);
+
+	i2s_write_reg(dev->i2s_base, CER, 1);
+}
+
+static void i2s_stop(struct i2svad_dev *dev,
+		struct snd_pcm_substream *substream)
+{
+
+	i2s_clear_irqs(dev, substream->stream);
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		i2s_write_reg(dev->i2s_base, ITER, 0);
+	else
+		i2s_write_reg(dev->i2s_base, IRER, 0);
+
+	i2s_disable_irqs(dev, substream->stream, 8);
+
+	if (!dev->active) {
+		i2s_write_reg(dev->i2s_base, CER, 0);
+		i2s_write_reg(dev->i2s_base, IER, 0);
+	}
+}
+
+static int dw_i2s_startup(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *cpu_dai)
+{
+	struct i2svad_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
+	union dw_i2s_snd_dma_data *dma_data = NULL;
+
+
+	if (!(dev->capability & DWC_I2S_RECORD) &&
+			(substream->stream == SNDRV_PCM_STREAM_CAPTURE))
+		return -EINVAL;
+
+	if (!(dev->capability & DWC_I2S_PLAY) &&
+			(substream->stream == SNDRV_PCM_STREAM_PLAYBACK))
+		return -EINVAL;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		dma_data = &dev->play_dma_data;
+	else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		dma_data = &dev->capture_dma_data;
+
+	snd_soc_dai_set_dma_data(cpu_dai, substream, (void *)dma_data);
+
+	return 0;
+}
+
+static void dw_i2s_config(struct i2svad_dev *dev, int stream)
+{
+	u32 ch_reg;
+	struct i2s_clk_config_data *config = &dev->config;
+
+
+	i2s_disable_channels(dev, stream);
+
+	for (ch_reg = 0; ch_reg < (config->chan_nr / 2); ch_reg++) {
+		if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			i2s_write_reg(dev->i2s_base, TCR(ch_reg),
+					dev->xfer_resolution);
+			i2s_write_reg(dev->i2s_base, TFCR(ch_reg),
+					dev->fifo_th - 1);
+			i2s_write_reg(dev->i2s_base, TER(ch_reg), 1);
+		} else {
+			i2s_write_reg(dev->i2s_base, RCR(ch_reg),
+					dev->xfer_resolution);
+			i2s_write_reg(dev->i2s_base, RFCR(ch_reg),
+					dev->fifo_th - 1);
+			i2s_write_reg(dev->i2s_base, RER(ch_reg), 1);
+		}
+
+	}
+}
+
+static int dw_i2s_hw_params(struct snd_pcm_substream *substream,
+		struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+	struct i2svad_dev *dev = snd_soc_dai_get_drvdata(dai);
+	struct i2s_clk_config_data *config = &dev->config;
+	int ret;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		config->data_width = 16;
+		dev->ccr = 0x00;
+		dev->xfer_resolution = 0x02;
+		break;
+
+	case SNDRV_PCM_FORMAT_S24_LE:
+		config->data_width = 24;
+		dev->ccr = 0x08;
+		dev->xfer_resolution = 0x04;
+		break;
+
+	case SNDRV_PCM_FORMAT_S32_LE:
+		config->data_width = 32;
+		dev->ccr = 0x10;
+		dev->xfer_resolution = 0x05;
+		break;
+
+	default:
+		dev_err(dev->dev, "designware-i2s: unsupported PCM fmt");
+		return -EINVAL;
+	}
+
+	config->chan_nr = params_channels(params);
+
+	switch (config->chan_nr) {
+	case EIGHT_CHANNEL_SUPPORT:
+	case SIX_CHANNEL_SUPPORT:
+	case FOUR_CHANNEL_SUPPORT:
+	case TWO_CHANNEL_SUPPORT:
+		break;
+	default:
+		dev_err(dev->dev, "channel not supported\n");
+		return -EINVAL;
+	}
+
+	dw_i2s_config(dev, substream->stream);
+
+	i2s_write_reg(dev->i2s_base, CCR, dev->ccr);
+
+	config->sample_rate = params_rate(params);
+
+	if (dev->capability & DW_I2S_MASTER) {
+		if (dev->i2s_clk_cfg) {
+			ret = dev->i2s_clk_cfg(config);
+			if (ret < 0) {
+				dev_err(dev->dev, "runtime audio clk config fail\n");
+				return ret;
+			}
+		} else {
+			u32 bitclk = config->sample_rate *
+					config->data_width * 2;
+
+			ret = clk_set_rate(dev->clk, bitclk);
+			if (ret) {
+				dev_err(dev->dev, "Can't set I2S clock rate: %d\n",
+					ret);
+				return ret;
+			}
+		}
+	}
+	return 0;
+}
+
+static void dw_i2s_shutdown(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	snd_soc_dai_set_dma_data(dai, substream, NULL);
+}
+
+static int dw_i2s_prepare(struct snd_pcm_substream *substream,
+			struct snd_soc_dai *dai)
+{
+	struct i2svad_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		i2s_write_reg(dev->i2s_base, TXFFR, 1);
+	else
+		i2s_write_reg(dev->i2s_base, RXFFR, 1);
+
+	return 0;
+}
+
+static int dw_i2s_trigger(struct snd_pcm_substream *substream,
+		int cmd, struct snd_soc_dai *dai)
+{
+	struct i2svad_dev *dev = snd_soc_dai_get_drvdata(dai);
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		dev->active++;
+		i2s_start(dev, substream);
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		dev->active--;
+		i2s_stop(dev, substream);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+	{
+		vad_trigger(&(dev->vad),cmd);
+	}
+	return ret;
+}
+
+static int dw_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+	struct i2svad_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
+	int ret = 0;
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		if (dev->capability & DW_I2S_SLAVE)
+			ret = 0;
+		else
+			ret = -EINVAL;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		if (dev->capability & DW_I2S_MASTER)
+			ret = 0;
+		else
+			ret = -EINVAL;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+	case SND_SOC_DAIFMT_CBS_CFM:
+		ret = -EINVAL;
+		break;
+	default:
+		dev_dbg(dev->dev, "dwc : Invalid master/slave format\n");
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static const struct snd_soc_dai_ops dw_i2s_dai_ops = {
+	.startup	= dw_i2s_startup,
+	.shutdown	= dw_i2s_shutdown,
+	.hw_params	= dw_i2s_hw_params,
+	.prepare	= dw_i2s_prepare,
+	.trigger	= dw_i2s_trigger,
+	.set_fmt	= dw_i2s_set_fmt,
+};
+
+#ifdef CONFIG_PM
+static int dw_i2s_runtime_suspend(struct device *dev)
+{
+	struct i2svad_dev *dw_dev = dev_get_drvdata(dev);
+
+	if (dw_dev->capability & DW_I2S_MASTER)
+		clk_disable(dw_dev->clk);
+	return 0;
+}
+
+static int dw_i2s_runtime_resume(struct device *dev)
+{
+	struct i2svad_dev *dw_dev = dev_get_drvdata(dev);
+
+	if (dw_dev->capability & DW_I2S_MASTER)
+		clk_enable(dw_dev->clk);
+	return 0;
+}
+
+static int dw_i2s_suspend(struct snd_soc_component *component)
+{
+	struct i2svad_dev *dev = snd_soc_component_get_drvdata(component);
+
+	if (dev->capability & DW_I2S_MASTER)
+		clk_disable(dev->clk);
+	return 0;
+}
+
+static int dw_i2s_resume(struct snd_soc_component *component)
+{
+	struct i2svad_dev *dev = snd_soc_component_get_drvdata(component);
+	struct snd_soc_dai *dai;
+	int stream;
+
+	if (dev->capability & DW_I2S_MASTER)
+		clk_enable(dev->clk);
+
+	for_each_component_dais(component, dai) {
+		for_each_pcm_streams(stream)
+			if (snd_soc_dai_stream_active(dai, stream))
+				dw_i2s_config(dev, stream);
+	}
+
+	return 0;
+}
+
+#else
+#define dw_i2s_suspend	NULL
+#define dw_i2s_resume	NULL
+#endif
+
+static int dw_i2svad_probe(struct snd_soc_component *component)
+{
+	vad_probe(component);
+	return 0;
+}
+
+static const struct snd_soc_component_driver dw_i2s_component = {
+	.name		= "dw-i2s",
+	.probe		= dw_i2svad_probe,
+	.suspend	= dw_i2s_suspend,
+	.resume		= dw_i2s_resume,
+};
+
+/*
+ * The following tables allow a direct lookup of various parameters
+ * defined in the I2S block's configuration in terms of sound system
+ * parameters.  Each table is sized to the number of entries possible
+ * according to the number of configuration bits describing an I2S
+ * block parameter.
+ */
+
+/* Maximum bit resolution of a channel - not uniformly spaced */
+static const u32 fifo_width[COMP_MAX_WORDSIZE] = {
+	12, 16, 20, 24, 32, 0, 0, 0
+};
+
+/* Width of (DMA) bus */
+static const u32 bus_widths[COMP_MAX_DATA_WIDTH] = {
+	DMA_SLAVE_BUSWIDTH_1_BYTE,
+	DMA_SLAVE_BUSWIDTH_2_BYTES,
+	DMA_SLAVE_BUSWIDTH_4_BYTES,
+	DMA_SLAVE_BUSWIDTH_UNDEFINED
+};
+
+/* PCM format to support channel resolution */
+static const u32 formats[COMP_MAX_WORDSIZE] = {
+	SNDRV_PCM_FMTBIT_S16_LE,
+	SNDRV_PCM_FMTBIT_S16_LE,
+	SNDRV_PCM_FMTBIT_S24_LE,
+	SNDRV_PCM_FMTBIT_S24_LE,
+	SNDRV_PCM_FMTBIT_S32_LE,
+	0,
+	0,
+	0
+};
+
+static const struct regmap_config sf_i2s_regmap_cfg = {
+	.reg_bits	= 32,
+	.val_bits	= 32,
+	.reg_stride	= 4,
+	.max_register	= 0x1000,
+};
+
+static int dw_configure_dai(struct i2svad_dev *dev,
+				struct snd_soc_dai_driver *dw_i2s_dai,
+				unsigned int rates)
+{
+	/*
+	 * Read component parameter registers to extract
+	 * the I2S block's configuration.
+	 */
+	u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1);
+	u32 comp2 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp2);
+	u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1));
+	u32 idx;
+
+	if (dev->capability & DWC_I2S_RECORD &&
+			dev->quirks & DW_I2S_QUIRK_COMP_PARAM1)
+		comp1 = comp1 & ~BIT(5);
+
+	if (dev->capability & DWC_I2S_PLAY &&
+			dev->quirks & DW_I2S_QUIRK_COMP_PARAM1)
+		comp1 = comp1 & ~BIT(6);
+
+	if (COMP1_TX_ENABLED(comp1)) {
+		dev_dbg(dev->dev, " designware: play supported\n");
+		idx = COMP1_TX_WORDSIZE_0(comp1);
+		if (WARN_ON(idx >= ARRAY_SIZE(formats)))
+			return -EINVAL;
+		if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE)
+			idx = 1;
+		dw_i2s_dai->playback.channels_min = MIN_CHANNEL_NUM;
+		dw_i2s_dai->playback.channels_max =
+				1 << (COMP1_TX_CHANNELS(comp1) + 1);
+		//dw_i2s_dai->playback.formats = formats[idx];
+		dw_i2s_dai->playback.formats = SNDRV_PCM_FMTBIT_S16_LE;
+		dw_i2s_dai->playback.rates = rates;
+	}
+
+	if (COMP1_RX_ENABLED(comp1)) {
+		dev_dbg(dev->dev, "designware: record supported\n");
+		idx = COMP2_RX_WORDSIZE_0(comp2);
+		if (WARN_ON(idx >= ARRAY_SIZE(formats)))
+			return -EINVAL;
+		if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE)
+			idx = 1;
+		dw_i2s_dai->capture.channels_min = MIN_CHANNEL_NUM;
+		dw_i2s_dai->capture.channels_max =
+				1 << (COMP1_RX_CHANNELS(comp1) + 1);
+		//dw_i2s_dai->capture.formats = formats[idx];
+		dw_i2s_dai->capture.formats = SNDRV_PCM_FMTBIT_S16_LE;
+		dw_i2s_dai->capture.rates = rates;
+	}
+
+	if (COMP1_MODE_EN(comp1)) {
+		dev_dbg(dev->dev, "designware: i2s master mode supported\n");
+		dev->capability |= DW_I2S_MASTER;
+	} else {
+		dev_dbg(dev->dev, "designware: i2s slave mode supported\n");
+		dev->capability |= DW_I2S_SLAVE;
+	}
+
+	dev->fifo_th = fifo_depth / 2;
+	return 0;
+}
+
+static int dw_configure_dai_by_pd(struct i2svad_dev *dev,
+				struct snd_soc_dai_driver *dw_i2s_dai,
+				struct resource *res,
+				const struct i2s_platform_data *pdata)
+{
+	u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1);
+	u32 idx = COMP1_APB_DATA_WIDTH(comp1);
+	int ret;
+
+	if (WARN_ON(idx >= ARRAY_SIZE(bus_widths)))
+		return -EINVAL;
+
+	ret = dw_configure_dai(dev, dw_i2s_dai, pdata->snd_rates);
+	if (ret < 0)
+		return ret;
+
+	if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE)
+		idx = 1;
+	/* Set DMA slaves info */
+	dev->play_dma_data.pd.data = pdata->play_dma_data;
+	dev->capture_dma_data.pd.data = pdata->capture_dma_data;
+	dev->play_dma_data.pd.addr = res->start + I2S_TXDMA;
+	dev->capture_dma_data.pd.addr = res->start + I2S_RXDMA;
+	dev->play_dma_data.pd.max_burst = 16;
+	dev->capture_dma_data.pd.max_burst = 16;
+	dev->play_dma_data.pd.addr_width = bus_widths[idx];
+	dev->capture_dma_data.pd.addr_width = bus_widths[idx];
+	dev->play_dma_data.pd.filter = pdata->filter;
+	dev->capture_dma_data.pd.filter = pdata->filter;
+
+	return 0;
+}
+
+static int dw_configure_dai_by_dt(struct i2svad_dev *dev,
+				struct snd_soc_dai_driver *dw_i2s_dai,
+				struct resource *res)
+{
+	u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1);
+	u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2);
+	u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1));
+	u32 idx = COMP1_APB_DATA_WIDTH(comp1);
+	u32 idx2;
+	int ret;
+
+	if (WARN_ON(idx >= ARRAY_SIZE(bus_widths)))
+		return -EINVAL;
+
+	ret = dw_configure_dai(dev, dw_i2s_dai, SNDRV_PCM_RATE_8000_192000);
+	if (ret < 0)
+		return ret;
+
+	if (COMP1_TX_ENABLED(comp1)) {
+		idx2 = COMP1_TX_WORDSIZE_0(comp1);
+
+		dev->capability |= DWC_I2S_PLAY;
+		dev->play_dma_data.dt.addr = res->start + I2S_TXDMA;
+		dev->play_dma_data.dt.addr_width = bus_widths[idx];
+		dev->play_dma_data.dt.fifo_size = fifo_depth *
+			(fifo_width[idx2]) >> 8;
+		dev->play_dma_data.dt.maxburst = 16;
+	}
+	if (COMP1_RX_ENABLED(comp1)) {
+		idx2 = COMP2_RX_WORDSIZE_0(comp2);
+
+		dev->capability |= DWC_I2S_RECORD;
+		dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA;
+		dev->capture_dma_data.dt.addr_width = bus_widths[idx];
+		dev->capture_dma_data.dt.fifo_size = fifo_depth *
+			(fifo_width[idx2] >> 8);
+		dev->capture_dma_data.dt.maxburst = 16;
+	}
+
+	return 0;
+
+}
+
+static int dw_i2s_probe(struct platform_device *pdev)
+{
+	const struct i2s_platform_data *pdata = pdev->dev.platform_data;
+	struct i2svad_dev *dev;
+	struct resource *res;
+	int ret, irq;
+	struct snd_soc_dai_driver *dw_i2s_dai;
+	const char *clk_id;
+
+	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
+
+	dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL);
+	if (!dw_i2s_dai)
+		return -ENOMEM;
+
+	dw_i2s_dai->ops = &dw_i2s_dai_ops;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	dev->i2s_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(dev->i2s_base))
+		return PTR_ERR(dev->i2s_base);
+
+	dev->vad.vad_base = dev->i2s_base;
+	dev->vad.vad_map = devm_regmap_init_mmio(&pdev->dev, dev->i2s_base, &sf_i2s_regmap_cfg);
+	if (IS_ERR(dev->vad.vad_map)) {
+		dev_err(&pdev->dev, "failed to init regmap: %ld\n",
+			PTR_ERR(dev->vad.vad_map));
+		return PTR_ERR(dev->vad.vad_map);
+	}
+
+	dev->dev = &pdev->dev;
+
+	dev->clk_apb_i2svad = devm_clk_get(&pdev->dev, "i2svad_apb");
+	if (IS_ERR(dev->clk_apb_i2svad))
+		return dev_err_probe(&pdev->dev, PTR_ERR(dev->clk_apb_i2svad),
+				     "failed to get apb clock\n");
+
+	dev->rst_apb_i2svad = devm_reset_control_get_exclusive(&pdev->dev, "apb_i2svad");
+	if (IS_ERR(dev->rst_apb_i2svad))
+		return dev_err_probe(&pdev->dev, PTR_ERR(dev->rst_apb_i2svad),
+				     "failed to get apb reset\n");
+
+	dev->rst_i2svad_srst = devm_reset_control_get_exclusive(&pdev->dev, "i2svad_srst");
+	if (IS_ERR(dev->rst_i2svad_srst))
+		return dev_err_probe(&pdev->dev, PTR_ERR(dev->rst_i2svad_srst),
+				     "failed to get source reset\n");
+
+	ret = clk_prepare_enable(dev->clk_apb_i2svad);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to enable apb clock\n");
+
+	ret = reset_control_deassert(dev->rst_apb_i2svad);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to deassert apb reset\n");
+
+	ret = reset_control_deassert(dev->rst_i2svad_srst);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to deassert source reset\n");
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq >= 0) {
+		ret = devm_request_irq(&pdev->dev, irq, i2s_irq_handler, 0,
+				pdev->name, dev);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "failed to request irq\n");
+			return ret;
+		}
+	}
+
+	dev->i2s_reg_comp1 = I2S_COMP_PARAM_1;
+	dev->i2s_reg_comp2 = I2S_COMP_PARAM_2;
+	if (pdata) {
+		dev->capability = pdata->cap;
+		clk_id = NULL;
+		dev->quirks = pdata->quirks;
+		if (dev->quirks & DW_I2S_QUIRK_COMP_REG_OFFSET) {
+			dev->i2s_reg_comp1 = pdata->i2s_reg_comp1;
+			dev->i2s_reg_comp2 = pdata->i2s_reg_comp2;
+		}
+		ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata);
+	} else {
+		clk_id = "i2sclk";
+		ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res);
+	}
+	if (ret < 0)
+		return ret;
+
+	if (dev->capability & DW_I2S_MASTER) {
+		if (pdata) {
+			dev->i2s_clk_cfg = pdata->i2s_clk_cfg;
+			if (!dev->i2s_clk_cfg) {
+				dev_err(&pdev->dev, "no clock configure method\n");
+				return -ENODEV;
+			}
+		}
+		dev->clk = devm_clk_get(&pdev->dev, clk_id);
+
+		if (IS_ERR(dev->clk))
+			return PTR_ERR(dev->clk);
+
+		ret = clk_prepare_enable(dev->clk);
+		if (ret < 0)
+			return ret;
+	}
+
+	dev_set_drvdata(&pdev->dev, dev);
+	ret = devm_snd_soc_register_component(&pdev->dev, &dw_i2s_component,
+					 dw_i2s_dai, 1);
+	if (ret != 0) {
+		dev_err(&pdev->dev, "not able to register dai\n");
+		goto err_clk_disable;
+	}
+
+	if (!pdata) {
+		if (irq >= 0) {
+			ret = i2svad_pcm_register(pdev);
+			dev->use_pio = true;
+		} else {
+			ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL,
+					0);
+			dev->use_pio = false;
+		}
+
+		if (ret) {
+			dev_err(&pdev->dev, "could not register pcm: %d\n",
+					ret);
+			goto err_clk_disable;
+		}
+	}
+
+	vad_init(&(dev->vad));
+	pm_runtime_enable(&pdev->dev);
+
+	return 0;
+
+err_clk_disable:
+	if (dev->capability & DW_I2S_MASTER)
+		clk_disable_unprepare(dev->clk);
+	return ret;
+}
+
+static void dw_i2s_remove(struct platform_device *pdev)
+{
+	struct i2svad_dev *dev = dev_get_drvdata(&pdev->dev);
+
+	if (dev->capability & DW_I2S_MASTER)
+		clk_disable_unprepare(dev->clk);
+
+	pm_runtime_disable(&pdev->dev);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id dw_i2s_of_match[] = {
+	{ .compatible = "starfive,sf-i2svad", },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, dw_i2s_of_match);
+#endif
+
+static const struct dev_pm_ops dwc_pm_ops = {
+	SET_RUNTIME_PM_OPS(dw_i2s_runtime_suspend, dw_i2s_runtime_resume, NULL)
+};
+
+static struct platform_driver dw_i2s_driver = {
+	.probe		= dw_i2s_probe,
+	.remove		= dw_i2s_remove,
+	.driver		= {
+		.name	= "sf-i2svad",
+		.of_match_table = of_match_ptr(dw_i2s_of_match),
+		.pm = &dwc_pm_ops,
+	},
+};
+
+module_platform_driver(dw_i2s_driver);
+
+MODULE_AUTHOR("jenny zhang <jenny.zhang@starfivetech.com>");
+MODULE_DESCRIPTION("starfive I2SVAD SoC Interface");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:sf-i2svad");
diff --git a/sound/soc/starfive/i2svad.h b/sound/soc/starfive/i2svad.h
new file mode 100644
index 000000000000..cd14cb4ce813
--- /dev/null
+++ b/sound/soc/starfive/i2svad.h
@@ -0,0 +1,246 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#ifndef __SND_SOC_STARFIVE_I2SVAD_H
+#define __SND_SOC_STARFIVE_I2SVAD_H
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/reset.h>
+#include <linux/types.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm.h>
+#include <sound/designware_i2s.h>
+
+/* common register for all channel */
+#define IER		0x000
+#define IRER		0x004
+#define ITER		0x008
+#define CER		0x00C
+#define CCR		0x010
+#define RXFFR		0x014
+#define TXFFR		0x018
+
+/* Interrupt status register fields */
+#define ISR_TXFO	BIT(5)
+#define ISR_TXFE	BIT(4)
+#define ISR_RXFO	BIT(1)
+#define ISR_RXDA	BIT(0)
+
+/* I2STxRxRegisters for all channels */
+#define LRBR_LTHR(x)	(0x40 * x + 0x020)
+#define RRBR_RTHR(x)	(0x40 * x + 0x024)
+#define RER(x)		(0x40 * x + 0x028)
+#define TER(x)		(0x40 * x + 0x02C)
+#define RCR(x)		(0x40 * x + 0x030)
+#define TCR(x)		(0x40 * x + 0x034)
+#define ISR(x)		(0x40 * x + 0x038)
+#define IMR(x)		(0x40 * x + 0x03C)
+#define ROR(x)		(0x40 * x + 0x040)
+#define TOR(x)		(0x40 * x + 0x044)
+#define RFCR(x)		(0x40 * x + 0x048)
+#define TFCR(x)		(0x40 * x + 0x04C)
+#define RFF(x)		(0x40 * x + 0x050)
+#define TFF(x)		(0x40 * x + 0x054)
+
+/* I2SCOMPRegisters */
+#define I2S_COMP_PARAM_2	0x01F0
+#define I2S_COMP_PARAM_1	0x01F4
+#define I2S_COMP_VERSION	0x01F8
+#define I2S_COMP_TYPE		0x01FC
+
+/* VAD Registers */
+#define VAD_LEFT_MARGIN				0x800  /* left_margin */
+#define VAD_RIGHT_MARGIN			0x804  /* right_margin */
+#define VAD_N_LOW_CONT_FRAMES			0x808  /* low-energy transition range threshold ——NL*/
+#define VAD_N_LOW_SEEK_FRAMES			0x80C  /* low-energy transition range */
+#define VAD_N_HIGH_CONT_FRAMES			0x810  /* high-energy transition range threshold——NH */
+#define VAD_N_HIGH_SEEK_FRAMES			0x814  /* high-energy transition range */
+#define VAD_N_SPEECH_LOW_HIGH_FRAMES		0x818  /* low-energy voice range threshold——NVL*/
+#define VAD_N_SPEECH_LOW_SEEK_FRAMES		0x81C  /* low-energy voice range*/
+#define VAD_MEAN_SIL_FRAMES			0x820  /* mean silence frame range*/
+#define VAD_N_ALPHA				0x824  /* low-energy threshold scaling factor,12bit(0~0xFFF)*/
+#define VAD_N_BETA				0x828  /* high-energy threshold scaling factor,12bit(0~0xFFF)*/
+#define VAD_FIFO_DEPTH				0x82C  /* status register for VAD */
+#define VAD_LR_SEL				0x840  /* L/R channel data selection for processing */
+#define VAD_SW					0x844  /* push enable signal*/
+#define VAD_LEFT_WD				0x848  /* select left channel*/
+#define VAD_RIGHT_WD				0x84C  /* select right channel*/
+#define VAD_STOP_DELAY				0x850  /* delay stop for 0-3 samples*/
+#define VAD_ADDR_START				0x854  /* vad memory start address, align with 64bit*/
+#define VAD_ADDR_WRAP				0x858  /* vad memory highest address for Push, align with 64bit,(addr_wrap-1) is the max physical address*/
+#define VAD_MEM_SW				0x85C  /* xmem switch */
+#define VAD_SPINT_CLR				0x860  /* clear vad_spint interrup status*/
+#define VAD_SPINT_EN				0x864  /* disable/enable vad_spint from vad_flag rising edge*/
+#define VAD_SLINT_CLR				0x868  /* clear vad_slint interrup status*/
+#define VAD_SLINT_EN				0x86C  /* disable/enable  vad_slint from vad_flag falling edge*/
+#define VAD_RAW_SPINT				0x870  /* status of spint before vad_spint_en*/
+#define VAD_RAW_SLINT				0x874  /* status of slint before vad_slint_en*/
+#define VAD_SPINT				0x878  /* status of spint after vad_spint_en*/
+#define VAD_SLINT				0x87C  /* status of slint before vad_slint_en*/
+#define VAD_XMEM_ADDR				0x880  /* next xmem address ,align to 16bi*/
+#define VAD_I2S_CTRL_REG_ADDR			0x884
+
+/*
+ * vad parameter register fields
+ */
+#define VAD_LEFT_MARGIN_MASK			GENMASK(4, 0)
+#define VAD_RIGHT_MARGIN_MASK			GENMASK(4, 0)
+#define VAD_N_LOW_CONT_FRAMES_MASK		GENMASK(4, 0)
+#define VAD_N_LOW_SEEK_FRAMES_MASK		GENMASK(4, 0)
+#define VAD_N_HIGH_CONT_FRAMES_MASK		GENMASK(4, 0)
+#define VAD_N_HIGH_SEEK_FRAMES_MASK		GENMASK(4, 0)
+#define VAD_N_SPEECH_LOW_HIGH_FRAMES_MASK	GENMASK(4, 0)
+#define VAD_N_SPEECH_LOW_SEEK_FRAMES_MASK	GENMASK(4, 0)
+#define VAD_MEAN_SIL_FRAMES_MASK		GENMASK(4, 0)
+#define VAD_N_ALPHA_MASK			GENMASK(11, 0)
+#define VAD_N_BETA_MASK				GENMASK(11, 0)
+#define VAD_LR_SEL_MASK				GENMASK(0, 0)
+#define VAD_LR_SEL_L				(0 << 0)
+#define VAD_LR_SEL_R				(1 << 0)
+
+#define VAD_SW_MASK				GENMASK(1, 0)
+#define VAD_SW_VAD_XMEM_ENABLE			(1 << 0)
+#define VAD_SW_VAD_XMEM_DISABLE			(0 << 0)
+#define VAD_SW_ADC_ENABLE			(1 << 1)
+#define VAD_SW_ADC_DISABLE			(0 << 1)
+
+
+#define VAD_LEFT_WD_MASK			GENMASK(0, 0)
+#define VAD_LEFT_WD_BIT_31_16			(1 << 1)
+#define VAD_LEFT_WD_BIT_15_0			(0 << 1)
+
+
+#define VAD_RIGHT_WD_MASK			GENMASK(0, 0)
+#define VAD_RIGHT_WD_BIT_31_16			(1 << 1)
+#define VAD_RIGHT_WD_BIT_15_0			(0 << 1)
+
+
+#define VAD_STOP_DELAY_MASK			GENMASK(1, 0)
+#define VAD_STOP_DELAY_0_SAMPLE			0
+#define VAD_STOP_DELAY_1_SAMPLE			1
+#define VAD_STOP_DELAY_2_SAMPLE			2
+#define VAD_STOP_DELAY_3_SAMPLE			3
+
+#define VAD_ADDR_START_MASK			GENMASK(12, 0)
+#define VAD_ADDR_WRAP_MASK			GENMASK(13, 0)
+#define VAD_MEM_SW_MASK				GENMASK(0, 0)
+#define VAD_SPINT_CLR_MASK			GENMASK(0, 0)
+#define VAD_SPINT_EN_MASK			GENMASK(0, 0)
+#define VAD_SLINT_CLR_MASK			GENMASK(0, 0)
+#define VAD_SLINT_EN_MASK			GENMASK(0, 0)
+#define VAD_I2S_CTRL_REG_ADDR_MASK		GENMASK(0, 0)
+
+#define VAD_MEM_SW_TO_VAD			(1 << 0)
+#define VAD_MEM_SW_TO_AXI			(0 << 0)
+
+#define VAD_SPINT_CLR_VAD_SPINT			(1 << 0)
+
+#define VAD_SPINT_EN_ENABLE			(1 << 0)
+#define VAD_SPINT_EN_DISABLE			(0 << 0)
+
+#define VAD_SLINT_CLR_VAD_SLINT			(1 << 0)
+
+#define VAD_SLINT_EN_ENABLE			(1 << 0)
+#define VAD_SLINT_EN_DISABLE			(0 << 0)
+
+#define VAD_STATUS_NORMAL			0
+#define VAD_STATUS_SPINT			1
+#define VAD_STATUS_SLINT			2
+
+/*
+ * Component parameter register fields - define the I2S block's
+ * configuration.
+ */
+#define COMP1_TX_WORDSIZE_3(r)		(((r) & GENMASK(27, 25)) >> 25)
+#define COMP1_TX_WORDSIZE_2(r)		(((r) & GENMASK(24, 22)) >> 22)
+#define COMP1_TX_WORDSIZE_1(r)		(((r) & GENMASK(21, 19)) >> 19)
+#define COMP1_TX_WORDSIZE_0(r)		(((r) & GENMASK(18, 16)) >> 16)
+#define COMP1_TX_CHANNELS(r)		(((r) & GENMASK(10, 9)) >> 9)
+#define COMP1_RX_CHANNELS(r)		(((r) & GENMASK(8, 7)) >> 7)
+#define COMP1_RX_ENABLED(r)		(((r) & BIT(6)) >> 6)
+#define COMP1_TX_ENABLED(r)		(((r) & BIT(5)) >> 5)
+#define COMP1_MODE_EN(r)		(((r) & BIT(4)) >> 4)
+#define COMP1_FIFO_DEPTH_GLOBAL(r)	(((r) & GENMASK(3, 2)) >> 2)
+#define COMP1_APB_DATA_WIDTH(r)		(((r) & GENMASK(1, 0)) >> 0)
+
+#define COMP2_RX_WORDSIZE_3(r)		(((r) & GENMASK(12, 10)) >> 10)
+#define COMP2_RX_WORDSIZE_2(r)		(((r) & GENMASK(9, 7)) >> 7)
+#define COMP2_RX_WORDSIZE_1(r)		(((r) & GENMASK(5, 3)) >> 3)
+#define COMP2_RX_WORDSIZE_0(r)		(((r) & GENMASK(2, 0)) >> 0)
+
+/* Number of entries in WORDSIZE and DATA_WIDTH parameter registers */
+#define COMP_MAX_WORDSIZE		(1 << 3)
+#define COMP_MAX_DATA_WIDTH		(1 << 2)
+
+#define MAX_CHANNEL_NUM		8
+#define MIN_CHANNEL_NUM		2
+#define ALL_CHANNEL_NUM		4
+
+
+union dw_i2s_snd_dma_data {
+	struct i2s_dma_data pd;
+	struct snd_dmaengine_dai_dma_data dt;
+};
+
+struct vad_params {
+	void __iomem *vad_base;
+	struct regmap *vad_map;
+	unsigned int vswitch;
+	unsigned int vstatus; /*vad detect status: 1:SPINT 2:SLINT 0:normal*/
+};
+
+struct i2svad_dev {
+	void __iomem *i2s_base;
+	struct clk *clk;
+	int active;
+	unsigned int capability;
+	unsigned int quirks;
+	unsigned int i2s_reg_comp1;
+	unsigned int i2s_reg_comp2;
+	struct device *dev;
+	u32 ccr;
+	u32 xfer_resolution;
+	u32 fifo_th;
+
+	struct clk *clk_apb_i2svad;
+	struct reset_control *rst_apb_i2svad;
+	struct reset_control *rst_i2svad_srst;
+
+	/* data related to DMA transfers b/w i2s and DMAC */
+	union dw_i2s_snd_dma_data play_dma_data;
+	union dw_i2s_snd_dma_data capture_dma_data;
+	struct i2s_clk_config_data config;
+	int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
+
+	/* data related to PIO transfers */
+	bool use_pio;
+	struct snd_pcm_substream __rcu *tx_substream;
+	struct snd_pcm_substream __rcu *rx_substream;
+	unsigned int (*tx_fn)(struct i2svad_dev *dev,
+			struct snd_pcm_runtime *runtime, unsigned int tx_ptr,
+			bool *period_elapsed);
+	unsigned int (*rx_fn)(struct i2svad_dev *dev,
+			struct snd_pcm_runtime *runtime, unsigned int rx_ptr,
+			bool *period_elapsed);
+	unsigned int tx_ptr;
+	unsigned int rx_ptr;
+
+	struct vad_params vad;
+};
+
+#if IS_ENABLED(CONFIG_SND_STARFIVE_I2SVAD_PCM)
+void i2svad_pcm_push_tx(struct i2svad_dev *dev);
+void i2svad_pcm_pop_rx(struct i2svad_dev *dev);
+int i2svad_pcm_register(struct platform_device *pdev);
+#else
+static inline void i2svad_pcm_push_tx(struct i2svad_dev *dev) { }
+static inline void i2svad_pcm_pop_rx(struct i2svad_dev *dev) { }
+static inline int i2svad_pcm_register(struct platform_device *pdev)
+{
+	return -EINVAL;
+}
+#endif
+
+#endif
diff --git a/sound/soc/starfive/pdm.c b/sound/soc/starfive/pdm.c
new file mode 100644
index 000000000000..71ffa5531829
--- /dev/null
+++ b/sound/soc/starfive/pdm.c
@@ -0,0 +1,362 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+
+#include "pdm.h"
+
+#define AUDIOC_CLK 	(12288000)
+#define PDM_MUL 	(128)
+
+struct sf_pdm {
+	struct regmap *pdm_map;
+	struct regmap *clk_map;
+	struct clk *clk;
+};
+
+static const DECLARE_TLV_DB_SCALE(volume_tlv, -9450, 150, 0);
+
+static const struct snd_kcontrol_new sf_pdm_snd_controls[] = {
+	SOC_SINGLE("DC compensation Control", PDM_DMIC_CTRL0, 30, 1, 0),
+	SOC_SINGLE("High Pass Filter Control", PDM_DMIC_CTRL0, 28, 1, 0),
+	SOC_SINGLE("Left Channel Volume Control", PDM_DMIC_CTRL0, 23, 1, 0),
+	SOC_SINGLE("Right Channel Volume Control", PDM_DMIC_CTRL0, 22, 1, 0),
+	SOC_SINGLE_TLV("Volume", PDM_DMIC_CTRL0, 16, 0x3F, 1, volume_tlv),
+	SOC_SINGLE("Data MSB Shift", PDM_DMIC_CTRL0, 1, 7, 0),
+	SOC_SINGLE("SCALE", PDM_DC_SCALE0, 0, 0x3F, 0),
+	SOC_SINGLE("DC offset", PDM_DC_SCALE0, 8, 0xFFFFF, 0),
+};
+
+static int sf_pdm_set_mclk(struct regmap *map, unsigned int clk, unsigned int weight)
+{
+	int mclk_div,bclk_div,lrclk_div;
+	u32	pdm_div;
+
+	/*
+	audio source clk:12288000, mclk_div:4, mclk:3M
+	support 8K/16K/32K/48K sample reate
+	suapport 16/24/32 bit weight
+	bit weight 32
+	mclk bclk  lrclk
+	3M   1.5M  48K
+	3M   1M    32K
+	3M   0.5M  16K
+	3M   0.25M  8K
+
+	bit weight 24,set lrclk_div as 32
+	mclk bclk  lrclk
+	3M   1.5M  48K
+	3M   1M    32K
+	3M   0.5M  16K
+	3M   0.25M  8K
+
+	bit weight 16
+	mclk bclk   lrclk
+	3M   0.75M  48K
+	3M   0.5M   32K
+	3M   0.25M  16K
+	3M   0.125M 8K
+	*/
+
+	switch (clk) {
+	case 8000:
+	case 16000:
+	case 32000:
+	case 48000:
+		break;
+	default:
+		printk(KERN_ERR "sample rate:%d\n", clk);
+		return -EINVAL;
+	}
+
+	switch (weight) {
+	case 16:
+	case 24:
+	case 32:
+		break;
+	default:
+		printk(KERN_ERR "bit weight:%d\n", weight);
+		return -EINVAL;
+	}
+
+	if (24 == weight) {
+		weight = 32;
+	}
+
+	mclk_div = 4;
+	bclk_div = AUDIOC_CLK/mclk_div/(clk*weight);
+	lrclk_div = weight;
+
+	/* PDM MCLK = 128*LRCLK */
+	pdm_div = AUDIOC_CLK/(PDM_MUL*clk);
+
+	regmap_update_bits(map, AUDIO_CLK_ADC_MCLK, 0x0F, mclk_div);
+	regmap_update_bits(map, AUDIO_CLK_I2SADC_BCLK, 0x1F, bclk_div);
+	regmap_update_bits(map, AUDIO_CLK_ADC_LRCLK, 0x3F, lrclk_div);
+	regmap_update_bits(map, AUDIO_CLK_PDM_CLK, 0x0F, pdm_div);
+
+	return 0;
+}
+
+static void sf_pdm_enable(struct regmap *map)
+{
+	/* Enable PDM */
+	regmap_update_bits(map, PDM_DMIC_CTRL0, 0x01<<PDM_DMIC_RVOL_OFFSET, 0);
+	regmap_update_bits(map, PDM_DMIC_CTRL0, 0x01<<PDM_DMIC_LVOL_OFFSET, 0);
+}
+
+static void sf_pdm_disable(struct regmap *map)
+{
+	regmap_update_bits(map, PDM_DMIC_CTRL0,
+		0x01<<PDM_DMIC_RVOL_OFFSET, 0x01<<PDM_DMIC_RVOL_OFFSET);
+	regmap_update_bits(map, PDM_DMIC_CTRL0,
+		0x01<<PDM_DMIC_LVOL_OFFSET, 0x01<<PDM_DMIC_LVOL_OFFSET);
+}
+
+static int sf_pdm_trigger(struct snd_pcm_substream *substream, int cmd,
+			struct snd_soc_dai *dai)
+{
+	struct sf_pdm *priv = snd_soc_dai_get_drvdata(dai);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		sf_pdm_enable(priv->pdm_map);
+		return 0;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		sf_pdm_disable(priv->pdm_map);
+		return 0;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static int sf_pdm_hw_params(struct snd_pcm_substream *substream,
+			struct snd_pcm_hw_params *params,
+			struct snd_soc_dai *dai)
+{
+	struct sf_pdm *priv = snd_soc_dai_get_drvdata(dai);
+	unsigned int rate = params_rate(params);
+	unsigned int width;
+	int ret;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		return 0;
+
+	width = params_width(params);
+	switch (width) {
+	case 16:
+	case 24:
+	case 32:
+		break;
+	default:
+		dev_err(dai->dev, "unsupported sample width\n");
+		return -EINVAL;
+	}
+
+	ret = sf_pdm_set_mclk(priv->clk_map, rate, width);
+	if (ret < 0) {
+		dev_err(dai->dev, "unsupported sample rate\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int sf_pdm_dai_probe(struct snd_soc_dai *dai)
+{
+	struct sf_pdm *priv = snd_soc_dai_get_drvdata(dai);
+
+	/* Reset */
+	regmap_update_bits(priv->pdm_map, PDM_DMIC_CTRL0,
+		0x01<<PDM_DMIC_SW_RSTN_OFFSET, 0x00);
+	regmap_update_bits(priv->pdm_map, PDM_DMIC_CTRL0,
+		0x01<<PDM_DMIC_SW_RSTN_OFFSET, 0x01<<PDM_DMIC_SW_RSTN_OFFSET);
+
+	/* Make sure the device is initially disabled */
+	sf_pdm_disable(priv->pdm_map);
+
+	/* MUTE */
+	regmap_update_bits(priv->pdm_map, PDM_DMIC_CTRL0,
+		0x3F<<PDM_DMIC_VOL_OFFSET, 0x3F<<PDM_DMIC_VOL_OFFSET);
+
+	/* UNMUTE */
+	regmap_update_bits(priv->pdm_map, PDM_DMIC_CTRL0,
+		0x3F<<PDM_DMIC_VOL_OFFSET, 0);
+
+	/* enable high pass filter */
+	regmap_update_bits(priv->pdm_map, PDM_DMIC_CTRL0,
+		0x01<<PDM_DMIC_ENHPF_OFFSET, 0x01<<PDM_DMIC_ENHPF_OFFSET);
+
+	/* i2s slaver mode */
+	regmap_update_bits(priv->pdm_map, PDM_DMIC_CTRL0,
+		0x01<<PDM_DMIC_I2SMODE_OFFSET, 0x01<<PDM_DMIC_I2SMODE_OFFSET);
+
+	/* disable fast mode */
+	regmap_update_bits(priv->pdm_map, PDM_DMIC_CTRL0,
+		0x01<<PDM_DMIC_FASTMODE_OFFSET, 0);
+
+	/* enable dc bypass mode */
+	regmap_update_bits(priv->pdm_map, PDM_DMIC_CTRL0,
+		0x01<<PDM_DMIC_DCBPS_OFFSET, 0);
+
+	/* dmic msb shift 0 */
+	regmap_update_bits(priv->pdm_map, PDM_DMIC_CTRL0,
+		0x07<<PDM_DMIC_MSB_SHIFT_OFFSET, 0);
+
+	/* scale:0 */
+	regmap_update_bits(priv->pdm_map, PDM_DC_SCALE0, 0x3F, 0x08);
+
+	/* DC offset:0 */
+	regmap_update_bits(priv->pdm_map, PDM_DC_SCALE0,
+		0xFFFFF<<PDM_DMIC_DCOFF1_OFFSET, 0xC0005<<PDM_DMIC_DCOFF1_OFFSET);
+
+	return 0;
+}
+
+static int sf_pdm_dai_remove(struct snd_soc_dai *dai)
+{
+	struct sf_pdm *priv = snd_soc_dai_get_drvdata(dai);
+
+	/* MUTE */
+	regmap_update_bits(priv->pdm_map, PDM_DMIC_CTRL0,
+		0x3F<<PDM_DMIC_VOL_OFFSET, 0x3F<<PDM_DMIC_VOL_OFFSET);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops sf_pdm_dai_ops = {
+	.probe		= sf_pdm_dai_probe,
+	.remove		= sf_pdm_dai_remove,
+	.trigger	= sf_pdm_trigger,
+	.hw_params	= sf_pdm_hw_params,
+};
+
+#define SF_PCM_RATE (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|\
+					SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_48000)
+
+static struct snd_soc_dai_driver sf_pdm_dai_drv = {
+	.name = "PDM",
+	.id = 0,
+	.capture = {
+		.stream_name	= "Capture",
+		.channels_min	= 2,
+		.channels_max	= 2,
+		.rates		= 	SF_PCM_RATE,
+		.formats	= 	SNDRV_PCM_FMTBIT_S16_LE|\
+						SNDRV_PCM_FMTBIT_S24_LE|\
+						SNDRV_PCM_FMTBIT_S32_LE,
+	},
+	.ops		= &sf_pdm_dai_ops,
+	.symmetric_rate = 1,
+};
+
+static int pdm_probe(struct snd_soc_component *component)
+{
+	struct sf_pdm *priv = snd_soc_component_get_drvdata(component);
+
+	snd_soc_component_init_regmap(component, priv->pdm_map);
+	snd_soc_add_component_controls(component, sf_pdm_snd_controls,
+				ARRAY_SIZE(sf_pdm_snd_controls));
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver sf_pdm_component_drv = {
+	.name = "sf-pdm",
+	.probe = pdm_probe,
+};
+
+static const struct regmap_config sf_pdm_regmap_cfg = {
+	.reg_bits	= 32,
+	.val_bits	= 32,
+	.reg_stride	= 4,
+	.max_register	= 0x20,
+};
+
+static const struct regmap_config sf_audio_clk_regmap_cfg = {
+	.reg_bits	= 32,
+	.val_bits	= 32,
+	.reg_stride	= 4,
+	.max_register	= 0x100,
+};
+
+static int sf_pdm_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct sf_pdm *priv;
+	struct resource *res;
+	void __iomem *regs;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, priv);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pdm");
+	regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+
+	priv->pdm_map = devm_regmap_init_mmio(dev, regs, &sf_pdm_regmap_cfg);
+	if (IS_ERR(priv->pdm_map)) {
+		dev_err(dev, "failed to init regmap: %ld\n",
+			PTR_ERR(priv->pdm_map));
+		return PTR_ERR(priv->pdm_map);
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audio-clk");
+	regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+
+	priv->clk_map = devm_regmap_init_mmio(dev, regs, &sf_audio_clk_regmap_cfg);
+	if (IS_ERR(priv->clk_map)) {
+		dev_err(dev, "failed to init regmap: %ld\n",
+			PTR_ERR(priv->clk_map));
+		return PTR_ERR(priv->clk_map);
+	}
+
+	return devm_snd_soc_register_component(dev, &sf_pdm_component_drv,
+					&sf_pdm_dai_drv, 1);
+}
+
+static void sf_pdm_dev_remove(struct platform_device *pdev)
+{
+}
+
+static const struct of_device_id sf_pdm_of_match[] = {
+	{.compatible = "starfive,sf-pdm",},
+	{}
+};
+MODULE_DEVICE_TABLE(of, sf_pdm_of_match);
+
+static struct platform_driver sf_pdm_driver = {
+
+	.probe = sf_pdm_probe,
+	.remove = sf_pdm_dev_remove,
+	.driver = {
+		.name = "sf-pdm",
+		.of_match_table = sf_pdm_of_match,
+	},
+};
+module_platform_driver(sf_pdm_driver);
+
+MODULE_AUTHOR("michael.yan <michael.yan@starfivetech.com>");
+MODULE_DESCRIPTION("starfive PDM Controller Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/starfive/pdm.h b/sound/soc/starfive/pdm.h
new file mode 100644
index 000000000000..cbc0a9ecd378
--- /dev/null
+++ b/sound/soc/starfive/pdm.h
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#ifndef __SND_SOC_STARFIVE_PDM_H
+#define __SND_SOC_STARFIVE_PDM_H
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm.h>
+#include <linux/dmaengine.h>
+#include <linux/types.h>
+
+#define PDM_DMIC_CTRL0			(0x00)
+#define PDM_DC_SCALE0			(0x04)
+#define PDM_DMIC_CTRL1			(0x10)
+#define PDM_DC_SCALE1			(0x14)
+
+/* PDM CTRL OFFSET */
+#define PDM_DMIC_MSB_SHIFT_OFFSET	(1)
+#define PDM_DMIC_VOL_OFFSET		(16)
+#define PDM_DMIC_RVOL_OFFSET		(22)
+#define PDM_DMIC_LVOL_OFFSET		(23)
+#define PDM_DMIC_I2SMODE_OFFSET		(24)
+#define PDM_DMIC_ENHPF_OFFSET		(28)
+#define PDM_DMIC_FASTMODE_OFFSET	(29)
+#define PDM_DMIC_DCBPS_OFFSET		(30)
+#define PDM_DMIC_SW_RSTN_OFFSET		(31)
+
+/* PDM SCALE OFFSET */
+#define PDM_DMIC_DCOFF3_OFFSET		(24)
+#define PDM_DMIC_DCOFF2_OFFSET		(16)
+#define PDM_DMIC_DCOFF1_OFFSET		(8)
+#define PDM_DMIC_SCALE_OFFSET		(0)
+
+#define AUDIO_CLK_ADC_MCLK		0x0
+#define AUDIO_CLK_I2SADC_BCLK		0xC
+#define AUDIO_CLK_ADC_LRCLK		0x14
+#define AUDIO_CLK_PDM_CLK		0x1C
+
+#endif /* __SND_SOC_STARFIVE_PDM_H */
diff --git a/sound/soc/starfive/pwmdac-pcm.c b/sound/soc/starfive/pwmdac-pcm.c
new file mode 100644
index 000000000000..d8d5dd2f3556
--- /dev/null
+++ b/sound/soc/starfive/pwmdac-pcm.c
@@ -0,0 +1,233 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#include <linux/io.h>
+#include <linux/rcupdate.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include "pwmdac.h"
+
+#define BUFFER_BYTES_MAX	(3 * 2 * 8 * PERIOD_BYTES_MIN)
+#define PERIOD_BYTES_MIN	4096
+#define PERIODS_MIN		2
+
+static unsigned int sf_pwmdac_pcm_tx_8(struct sf_pwmdac_dev *dev,
+		struct snd_pcm_runtime *runtime, unsigned int tx_ptr,
+		bool *period_elapsed)
+{
+	const u8 (*p)[2] = (void *)runtime->dma_area;
+	unsigned int period_pos = tx_ptr % runtime->period_size;
+	int i;
+	u32 basedat = 0;
+
+	for (i = 0; i < dev->fifo_th; i++) {
+		basedat = (p[tx_ptr][0]<<8)|(p[tx_ptr][1] << 24);
+		iowrite32(basedat,dev->pwmdac_base + PWMDAC_WDATA);
+		period_pos++;
+		if (++tx_ptr >= runtime->buffer_size)
+			tx_ptr = 0;
+	}
+
+	*period_elapsed = period_pos >= runtime->period_size;
+
+	return tx_ptr;
+}
+
+
+static unsigned int sf_pwmdac_pcm_tx_16(struct sf_pwmdac_dev *dev,
+		struct snd_pcm_runtime *runtime, unsigned int tx_ptr,
+		bool *period_elapsed)
+{
+	const u16 (*p)[2] = (void *)runtime->dma_area;
+	unsigned int period_pos = tx_ptr % runtime->period_size;
+	int i;
+	u32 basedat = 0;
+
+	for (i = 0; i < dev->fifo_th; i++) {
+		basedat = (p[tx_ptr][0])|(p[tx_ptr][1] << 16);
+		iowrite32(basedat,dev->pwmdac_base + PWMDAC_WDATA);
+		period_pos++;
+		if (++tx_ptr >= runtime->buffer_size)
+			tx_ptr = 0;
+	}
+
+	*period_elapsed = period_pos >= runtime->period_size;
+	return tx_ptr;
+}
+
+static const struct snd_pcm_hardware sf_pcm_hardware = {
+	.info = SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_BLOCK_TRANSFER,
+	.rates = SNDRV_PCM_RATE_16000,
+	.rate_min = 16000,
+	.rate_max = 16000,
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.channels_min = 2,
+	.channels_max = 2,
+	.buffer_bytes_max = BUFFER_BYTES_MAX,
+	.period_bytes_min = PERIOD_BYTES_MIN,
+	.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN,
+	.periods_min = PERIODS_MIN,
+	.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN,
+	.fifo_size = 2,
+};
+
+static void sf_pcm_transfer(struct sf_pwmdac_dev *dev, bool push)
+{
+	struct snd_pcm_substream *substream = NULL;
+	bool period_elapsed = false;
+	bool active;
+
+	rcu_read_lock();
+	if (push)
+		substream = rcu_dereference(dev->tx_substream);
+
+	active = substream && snd_pcm_running(substream);
+	if (active) {
+		unsigned int ptr;
+		unsigned int new_ptr;
+
+		if (push) {
+			ptr = READ_ONCE(dev->tx_ptr);
+			new_ptr = dev->tx_fn(dev, substream->runtime, ptr,
+					&period_elapsed);
+			cmpxchg(&dev->tx_ptr, ptr, new_ptr);
+		}
+
+		if (period_elapsed)
+			snd_pcm_period_elapsed(substream);
+	}
+	rcu_read_unlock();
+}
+
+void sf_pwmdac_pcm_push_tx(struct sf_pwmdac_dev *dev)
+{
+	sf_pcm_transfer(dev, true);
+}
+
+
+static int sf_pcm_open(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
+	struct sf_pwmdac_dev *dev = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0));
+
+	snd_soc_set_runtime_hwparams(substream, &sf_pcm_hardware);
+	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+	runtime->private_data = dev;
+
+	return 0;
+}
+
+
+static int sf_pcm_close(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream)
+{
+	synchronize_rcu();
+	return 0;
+}
+
+static int sf_pcm_hw_params(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream,
+			struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct sf_pwmdac_dev *dev = runtime->private_data;
+
+	switch (params_channels(hw_params)) {
+	case 2:
+		break;
+	default:
+		dev_err(dev->dev, "invalid channels number\n");
+		return -EINVAL;
+	}
+
+	switch (params_format(hw_params)) {
+	case SNDRV_PCM_FORMAT_U8:
+	case SNDRV_PCM_FORMAT_S8:
+		dev->tx_fn = sf_pwmdac_pcm_tx_8;
+		break;
+	case SNDRV_PCM_FORMAT_S16_LE:
+		dev->tx_fn = sf_pwmdac_pcm_tx_16;
+		break;
+	default:
+		dev_err(dev->dev, "invalid format\n");
+		return -EINVAL;
+	}
+
+		return 0;
+}
+
+
+static int sf_pcm_trigger(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream, int cmd)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct sf_pwmdac_dev *dev = runtime->private_data;
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			WRITE_ONCE(dev->tx_ptr, 0);
+			rcu_assign_pointer(dev->tx_substream, substream);
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			rcu_assign_pointer(dev->tx_substream, NULL);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static snd_pcm_uframes_t sf_pcm_pointer(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct sf_pwmdac_dev *dev = runtime->private_data;
+	snd_pcm_uframes_t pos = 0;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		pos = READ_ONCE(dev->tx_ptr);
+
+	return pos < runtime->buffer_size ? pos : 0;
+}
+
+static int sf_pcm_new(struct snd_soc_component *component,
+			struct snd_soc_pcm_runtime *rtd)
+{
+	size_t size = sf_pcm_hardware.buffer_bytes_max;
+
+	snd_pcm_set_managed_buffer_all(rtd->pcm,
+			SNDRV_DMA_TYPE_CONTINUOUS,
+			NULL, size, size);
+	return 0;
+}
+
+static const struct snd_soc_component_driver dw_pcm_component = {
+	.open		= sf_pcm_open,
+	.close		= sf_pcm_close,
+	.hw_params	= sf_pcm_hw_params,
+	.trigger	= sf_pcm_trigger,
+	.pointer	= sf_pcm_pointer,
+	.pcm_construct	= sf_pcm_new,
+};
+
+int sf_pwmdac_pcm_register(struct platform_device *pdev)
+{
+	return devm_snd_soc_register_component(&pdev->dev, &dw_pcm_component,
+					NULL, 0);
+}
diff --git a/sound/soc/starfive/pwmdac-transmitter.c b/sound/soc/starfive/pwmdac-transmitter.c
new file mode 100644
index 000000000000..46c2e5041ffb
--- /dev/null
+++ b/sound/soc/starfive/pwmdac-transmitter.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/slab.h>
+#include <sound/soc.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+#include <linux/of.h>
+
+#define DRV_NAME "pwmdac-dit"
+
+#define STUB_RATES	SNDRV_PCM_RATE_8000_192000
+#define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S8|\
+			SNDRV_PCM_FMTBIT_U8      |\
+			SNDRV_PCM_FMTBIT_S16_LE  | \
+			SNDRV_PCM_FMTBIT_S20_3LE | \
+			SNDRV_PCM_FMTBIT_S24_LE  | \
+			SNDRV_PCM_FMTBIT_S32_LE)
+
+static const struct snd_soc_dapm_widget dit_widgets[] = {
+	SND_SOC_DAPM_OUTPUT("pwmdac-out"),
+};
+
+static const struct snd_soc_dapm_route dit_routes[] = {
+	{ "pwmdac-out", NULL, "Playback" },
+};
+
+static struct snd_soc_component_driver soc_codec_pwmdac_dit = {
+	.dapm_widgets		= dit_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(dit_widgets),
+	.dapm_routes		= dit_routes,
+	.num_dapm_routes	= ARRAY_SIZE(dit_routes),
+	.idle_bias_on		= 1,
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+};
+
+static struct snd_soc_dai_driver dit_stub_dai = {
+	.name		= "pwmdac-dit-hifi",
+	.playback 	= {
+		.stream_name	= "Playback",
+		.channels_min	= 1,
+		.channels_max	= 384,
+		.rates		= STUB_RATES,
+		.formats	= STUB_FORMATS,
+	},
+};
+
+static int pwmdac_dit_probe(struct platform_device *pdev)
+{
+
+	return devm_snd_soc_register_component(&pdev->dev,
+			&soc_codec_pwmdac_dit,
+			&dit_stub_dai, 1);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id pwmdac_dit_dt_ids[] = {
+	{ .compatible = "linux,pwmdac-dit", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pwmdac_dit_dt_ids);
+#endif
+
+static struct platform_driver pwmdac_dit_driver = {
+	.probe		= pwmdac_dit_probe,
+	.driver		= {
+		.name	= DRV_NAME,
+		.of_match_table = of_match_ptr(pwmdac_dit_dt_ids),
+	},
+};
+
+module_platform_driver(pwmdac_dit_driver);
+
+MODULE_AUTHOR("jenny.zhang <jenny.zhang@starfivetech.com>");
+MODULE_DESCRIPTION("pwmdac dummy codec driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform: starfive-pwmdac dummy codec");
diff --git a/sound/soc/starfive/pwmdac.c b/sound/soc/starfive/pwmdac.c
new file mode 100644
index 000000000000..2fd4db944f6e
--- /dev/null
+++ b/sound/soc/starfive/pwmdac.c
@@ -0,0 +1,862 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PWMDAC driver for the StarFive JH7100 SoC
+ *
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+#include "pwmdac.h"
+#include <linux/kthread.h>
+
+struct ct_pwmdac {
+	char *name;
+	unsigned int vals;
+};
+
+static const struct ct_pwmdac pwmdac_ct_shift_bit[] = {
+	{ .name = "8bit", .vals = PWMDAC_SHIFT_8 },
+	{ .name = "10bit", .vals = PWMDAC_SHIFT_10 }
+};
+
+static const struct ct_pwmdac pwmdac_ct_duty_cycle[] = {
+	{ .name = "left", .vals = PWMDAC_CYCLE_LEFT },
+	{ .name = "right", .vals = PWMDAC_CYCLE_RIGHT },
+	{ .name = "center", .vals = PWMDAC_CYCLE_CENTER }
+};
+
+static const struct ct_pwmdac pwmdac_ct_data_mode[] = {
+	{ .name = "unsinged", .vals = UNSINGED_DATA },
+	{ .name = "inverter", .vals = INVERTER_DATA_MSB }
+};
+
+static const struct ct_pwmdac pwmdac_ct_lr_change[] = {
+	{ .name = "no_change", .vals = NO_CHANGE },
+	{ .name = "change", .vals = CHANGE }
+};
+
+static const struct ct_pwmdac pwmdac_ct_shift[] = {
+	{ .name = "left 0 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_0 },
+	{ .name = "left 1 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_1 },
+	{ .name = "left 2 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_2 },
+	{ .name = "left 3 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_3 },
+	{ .name = "left 4 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_4 },
+	{ .name = "left 5 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_5 },
+	{ .name = "left 6 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_6 }
+};
+
+static int pwmdac_shift_bit_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	unsigned int items = ARRAY_SIZE(pwmdac_ct_shift_bit);
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = items;
+	if (uinfo->value.enumerated.item >= items) {
+		uinfo->value.enumerated.item = items - 1;
+	}
+	strcpy(uinfo->value.enumerated.name,
+			pwmdac_ct_shift_bit[uinfo->value.enumerated.item].name);
+
+	return 0;
+}
+static int pwmdac_shift_bit_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+	unsigned int item;
+
+	if (dev->shift_bit == pwmdac_ct_shift_bit[0].vals)
+		item = 0;
+	else
+		item = 1;
+
+	ucontrol->value.enumerated.item[0] = item;
+
+	return 0;
+}
+
+static int pwmdac_shift_bit_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+	int sel = ucontrol->value.enumerated.item[0];
+	unsigned int items = ARRAY_SIZE(pwmdac_ct_shift_bit);
+
+	if (sel > items)
+		return 0;
+
+	switch (sel) {
+	case 1:
+		dev->shift_bit = pwmdac_ct_shift_bit[1].vals;
+		break;
+	default:
+		dev->shift_bit = pwmdac_ct_shift_bit[0].vals;
+		break;
+	}
+
+	return 0;
+}
+
+static int pwmdac_duty_cycle_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	unsigned int items = ARRAY_SIZE(pwmdac_ct_duty_cycle);
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = items;
+	if (uinfo->value.enumerated.item >= items)
+		uinfo->value.enumerated.item = items - 1;
+	strcpy(uinfo->value.enumerated.name,
+		pwmdac_ct_duty_cycle[uinfo->value.enumerated.item].name);
+
+	return 0;
+}
+
+static int pwmdac_duty_cycle_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+
+	ucontrol->value.enumerated.item[0] = dev->duty_cycle;
+	return 0;
+}
+
+static int pwmdac_duty_cycle_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+	int sel = ucontrol->value.enumerated.item[0];
+	unsigned int items = ARRAY_SIZE(pwmdac_ct_duty_cycle);
+
+	if (sel > items)
+		return 0;
+
+	dev->duty_cycle = pwmdac_ct_duty_cycle[sel].vals;
+	return 0;
+}
+
+/*
+static int pwmdac_datan_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 1;
+	uinfo->value.integer.max = PWMDAC_SAMPLE_CNT_511;
+	uinfo->value.integer.step = 1;
+	return 0;
+}
+
+static int pwmdac_datan_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+
+	ucontrol->value.integer.value[0] = dev->datan;
+
+	return 0;
+}
+
+static int pwmdac_datan_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+	int sel = ucontrol->value.integer.value[0];
+
+	if (sel > PWMDAC_SAMPLE_CNT_511)
+		return 0;
+
+	dev->datan = sel;
+
+	return 0;
+}
+*/
+
+static int pwmdac_data_mode_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	unsigned int items = ARRAY_SIZE(pwmdac_ct_data_mode);
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = items;
+	if (uinfo->value.enumerated.item >= items)
+		uinfo->value.enumerated.item = items - 1;
+	strcpy(uinfo->value.enumerated.name,
+		pwmdac_ct_data_mode[uinfo->value.enumerated.item].name);
+
+	return 0;
+}
+
+static int pwmdac_data_mode_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+
+	ucontrol->value.enumerated.item[0] = dev->data_mode;
+	return 0;
+}
+
+static int pwmdac_data_mode_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+	int sel = ucontrol->value.enumerated.item[0];
+	unsigned int items = ARRAY_SIZE(pwmdac_ct_data_mode);
+
+	if (sel > items)
+		return 0;
+
+	dev->data_mode = pwmdac_ct_data_mode[sel].vals;
+	return 0;
+}
+
+static int pwmdac_shift_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	unsigned int items = ARRAY_SIZE(pwmdac_ct_shift);
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = items;
+	if (uinfo->value.enumerated.item >= items)
+		uinfo->value.enumerated.item = items - 1;
+	strcpy(uinfo->value.enumerated.name,
+		pwmdac_ct_shift[uinfo->value.enumerated.item].name);
+
+	return 0;
+}
+
+static int pwmdac_shift_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+	unsigned int item = dev->shift;
+
+	ucontrol->value.enumerated.item[0] = pwmdac_ct_shift[item].vals;
+	return 0;
+}
+
+static int pwmdac_shift_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+	int sel = ucontrol->value.enumerated.item[0];
+	unsigned int items = ARRAY_SIZE(pwmdac_ct_shift);
+
+	if (sel > items)
+		return 0;
+
+	dev->shift = pwmdac_ct_shift[sel].vals;
+	return 0;
+}
+
+static int pwmdac_lr_change_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+	unsigned int items = ARRAY_SIZE(pwmdac_ct_lr_change);
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = items;
+	if (uinfo->value.enumerated.item >= items)
+		uinfo->value.enumerated.item = items - 1;
+	strcpy(uinfo->value.enumerated.name,
+		pwmdac_ct_lr_change[uinfo->value.enumerated.item].name);
+
+	return 0;
+}
+
+static int pwmdac_lr_change_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+
+	ucontrol->value.enumerated.item[0] = dev->lr_change;
+	return 0;
+}
+
+static int pwmdac_lr_change_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	struct sf_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
+	int sel = ucontrol->value.enumerated.item[0];
+	unsigned int items = ARRAY_SIZE(pwmdac_ct_lr_change);
+
+	if (sel > items)
+		return 0;
+
+	dev->lr_change = pwmdac_ct_lr_change[sel].vals;
+	return 0;
+}
+
+static inline void pwmdc_write_reg(void __iomem *io_base, int reg, u32 val)
+{
+	writel(val, io_base + reg);
+}
+
+static inline u32 pwmdc_read_reg(void __iomem *io_base, int reg)
+{
+	return readl(io_base + reg);
+}
+
+/*
+ * 32bit-4byte
+*/
+static void pwmdac_set_ctrl_enable(struct sf_pwmdac_dev *dev)
+{
+	u32 date;
+	date = pwmdc_read_reg(dev->pwmdac_base, PWMDAC_CTRL);
+	pwmdc_write_reg(dev->pwmdac_base, PWMDAC_CTRL, date | BIT(0) );
+}
+
+/*
+ * 32bit-4byte
+*/
+static void pwmdac_set_ctrl_disable(struct sf_pwmdac_dev *dev)
+{
+	u32 date;
+	date = pwmdc_read_reg(dev->pwmdac_base, PWMDAC_CTRL);
+	pwmdc_write_reg(dev->pwmdac_base, PWMDAC_CTRL, date & ~ BIT(0));
+}
+
+/*
+ * 8:8-bit
+ * 10:10-bit
+*/
+static void pwmdac_set_ctrl_shift(struct sf_pwmdac_dev *dev, u8 data)
+{
+	u32 value = 0;
+
+	if (data == 8) {
+		value = (~((~value) | 0x02));
+		pwmdc_write_reg(dev->pwmdac_base , PWMDAC_CTRL, value);
+	}
+	else if(data == 10){
+		value |= 0x02;
+		pwmdc_write_reg(dev->pwmdac_base , PWMDAC_CTRL, value);
+	}
+}
+
+/*
+ * 00:left
+ * 01:right
+ * 10:center
+*/
+static void pwmdac_set_ctrl_dutyCycle(struct sf_pwmdac_dev *dev, u8 data)
+{
+	u32 value = 0;
+
+	value = pwmdc_read_reg(dev->pwmdac_base , PWMDAC_CTRL);
+	if (data == 0) { //left
+		value = (~((~value) | (0x03<<2)));
+		pwmdc_write_reg(dev->pwmdac_base , PWMDAC_CTRL, value);
+	}
+	else if (data == 1) { //right
+		value = (~((~value) | (0x01<<3))) | (0x01<<2);
+		pwmdc_write_reg(dev->pwmdac_base , PWMDAC_CTRL, value);
+	}
+	else if (data == 2) { //center
+		value = (~((~value) | (0x01<<2))) | (0x01<<3);
+		pwmdc_write_reg(dev->pwmdac_base , PWMDAC_CTRL, value);
+	}
+}
+
+
+static void pwmdac_set_ctrl_N(struct sf_pwmdac_dev *dev, u16 data)
+{
+	u32 value = 0;
+
+	value = pwmdc_read_reg(dev->pwmdac_base , PWMDAC_CTRL);
+	pwmdc_write_reg(dev->pwmdac_base , PWMDAC_CTRL, (value & 0xF) | ((data - 1) << 4));
+}
+
+
+static void pwmdac_LR_data_change(struct sf_pwmdac_dev *dev, u8 data)
+{
+	u32 value = 0;
+
+	value = pwmdc_read_reg(dev->pwmdac_base , PWMDAC_CTRL);
+	switch (data) {
+	case NO_CHANGE:
+		value &= (~SFC_PWMDAC_LEFT_RIGHT_DATA_CHANGE);
+		break;
+	case CHANGE:
+		value |= SFC_PWMDAC_LEFT_RIGHT_DATA_CHANGE;
+		break;
+	}
+	pwmdc_write_reg(dev->pwmdac_base, PWMDAC_CTRL, value);
+}
+
+static void pwmdac_data_mode(struct sf_pwmdac_dev *dev, u8 data)
+{
+	u32 value = 0;
+
+	value = pwmdc_read_reg(dev->pwmdac_base , PWMDAC_CTRL);
+	if (data == UNSINGED_DATA) {
+		value &= (~SFC_PWMDAC_DATA_MODE);
+	}
+	else if (data == INVERTER_DATA_MSB) {
+		value |= SFC_PWMDAC_DATA_MODE;
+	}
+	pwmdc_write_reg(dev->pwmdac_base,PWMDAC_CTRL, value);
+}
+
+static int pwmdac_data_shift(struct sf_pwmdac_dev *dev,u8 data)
+{
+	u32 value = 0;
+
+	if ((data < PWMDAC_DATA_LEFT_SHIFT_BIT_0) || (data > PWMDAC_DATA_LEFT_SHIFT_BIT_7)) {
+		return -1;
+	}
+
+	value = pwmdc_read_reg(dev->pwmdac_base , PWMDAC_CTRL);
+	value &= ( ~ ( PWMDAC_DATA_LEFT_SHIFT_BIT_ALL << 15 ) );
+	value |= (data<<15);
+	pwmdc_write_reg(dev->pwmdac_base , PWMDAC_CTRL, value);
+	return 0;
+}
+
+static int get_pwmdac_fifo_state(struct sf_pwmdac_dev *dev)
+{
+	u32 value;
+
+	value = pwmdc_read_reg(dev->pwmdac_base , PWMDAC_SATAE);
+	if ((value & 0x02) == 0)
+		return FIFO_UN_FULL;
+
+	return FIFO_FULL;
+}
+
+
+static void pwmdac_set(struct sf_pwmdac_dev *dev)
+{
+	///8-bit + left + N=16
+	pwmdac_set_ctrl_shift(dev, dev->shift_bit);
+	pwmdac_set_ctrl_dutyCycle(dev, dev->duty_cycle);
+	pwmdac_set_ctrl_N(dev, dev->datan);
+	pwmdac_set_ctrl_enable(dev);
+
+	pwmdac_LR_data_change(dev, dev->lr_change);
+	pwmdac_data_mode(dev, dev->data_mode);
+	if (dev->shift) {
+		pwmdac_data_shift(dev, dev->shift);
+	}
+}
+
+static void pwmdac_stop(struct sf_pwmdac_dev *dev)
+{
+	pwmdac_set_ctrl_disable(dev);
+}
+
+static int pwmdac_config(struct sf_pwmdac_dev *dev)
+{
+	switch (dev->mode) {
+	case shift_8Bit_unsigned:
+	case shift_8Bit_unsigned_dataShift:
+		/* 8 bit, unsigned */
+		dev->shift_bit	= PWMDAC_SHIFT_8;
+		dev->duty_cycle	= PWMDAC_CYCLE_CENTER;
+		dev->datan		= PWMDAC_SAMPLE_CNT_8;
+		dev->data_mode	= UNSINGED_DATA;
+		break;
+
+	case shift_8Bit_inverter:
+	case shift_8Bit_inverter_dataShift:
+		/* 8 bit, invert */
+		dev->shift_bit	= PWMDAC_SHIFT_8;
+		dev->duty_cycle	= PWMDAC_CYCLE_CENTER;
+		dev->datan		= PWMDAC_SAMPLE_CNT_8;
+		dev->data_mode	= INVERTER_DATA_MSB;
+		break;
+
+	case shift_10Bit_unsigned:
+	case shift_10Bit_unsigned_dataShift:
+		/* 10 bit, unsigend */
+		dev->shift_bit	= PWMDAC_SHIFT_10;
+		dev->duty_cycle	= PWMDAC_CYCLE_CENTER;
+		dev->datan		= PWMDAC_SAMPLE_CNT_8;
+		dev->data_mode	= UNSINGED_DATA;
+		break;
+
+	case shift_10Bit_inverter:
+	case shift_10Bit_inverter_dataShift:
+		/* 10 bit, invert */
+		dev->shift_bit	= PWMDAC_SHIFT_10;
+		dev->duty_cycle	= PWMDAC_CYCLE_CENTER;
+		dev->datan		= PWMDAC_SAMPLE_CNT_8;
+		dev->data_mode	= INVERTER_DATA_MSB;
+		break;
+
+	default:
+		return -1;
+	}
+
+	if ((dev->mode == shift_8Bit_unsigned_dataShift) || (dev->mode == shift_8Bit_inverter_dataShift)
+		|| (dev->mode == shift_10Bit_unsigned_dataShift) || (dev->mode == shift_10Bit_inverter_dataShift)) {
+		dev->shift = 4; /*0~7*/
+	} else {
+		dev->shift = 0;
+	}
+	dev->lr_change = NO_CHANGE;
+	return 0;
+}
+
+static int sf_pwmdac_prepare(struct snd_pcm_substream *substream,
+			struct snd_soc_dai *dai)
+{
+	//struct sf_pwmdac_dev *dev = snd_soc_dai_get_drvdata(dai);
+	//pwmdac_set(dev);
+	return 0;
+}
+
+static int pwmdac_tx_thread(void *dev)
+{
+	struct sf_pwmdac_dev *pwmdac_dev = (struct sf_pwmdac_dev *)dev;
+
+	set_current_state(TASK_INTERRUPTIBLE);
+	while (!schedule_timeout(usecs_to_jiffies(50))) {
+		if (pwmdac_dev->tx_thread_exit)
+			break;
+		if (get_pwmdac_fifo_state(pwmdac_dev)==0) {
+			sf_pwmdac_pcm_push_tx(pwmdac_dev);
+		}
+
+		set_current_state(TASK_INTERRUPTIBLE);
+	}
+
+	pwmdac_dev->tx_thread = NULL;
+	return 0;
+}
+
+static int sf_pwmdac_trigger(struct snd_pcm_substream *substream,
+		int cmd, struct snd_soc_dai *dai)
+{
+	struct sf_pwmdac_dev *dev = snd_soc_dai_get_drvdata(dai);
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		dev->active++;
+		pwmdac_set(dev);
+		if (dev->use_pio) {
+			dev->tx_thread = kthread_create(pwmdac_tx_thread, (void *)dev, "pwmdac");
+			if (IS_ERR(dev->tx_thread)) {
+				return PTR_ERR(dev->tx_thread);
+			}
+			wake_up_process(dev->tx_thread);
+			dev->tx_thread_exit = 0;
+		}
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		dev->active--;
+		pwmdac_stop(dev);
+		if (dev->use_pio) {
+			if(dev->tx_thread) {
+				dev->tx_thread_exit = 1;
+			}
+		}
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+
+	return 0;
+}
+
+static int sf_pwmdac_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+	struct sf_pwmdac_dev *dev = dev_get_drvdata(dai->dev);
+
+	dev->play_dma_data.addr = dev->mapbase + PWMDAC_WDATA;
+
+	switch (params_channels(params)) {
+	case 2:
+		dev->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+		break;
+	case 1:
+		dev->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+		break;
+	default:
+		dev_err(dai->dev, "%d channels not supported\n",
+				params_channels(params));
+		return -EINVAL;
+	}
+
+	dev->play_dma_data.fifo_size = 1;
+	dev->play_dma_data.maxburst = 16;
+
+	snd_soc_dai_init_dma_data(dai, &dev->play_dma_data, NULL);
+	snd_soc_dai_set_drvdata(dai, dev);
+
+	return 0;
+}
+
+static int sf_pwmdac_clks_get(struct platform_device *pdev,
+			      struct sf_pwmdac_dev *dev)
+{
+	static const char *const clock_names[PWMDAC_CLK_NUM] = {
+		[PWMDAC_CLK_AUDIO_ROOT]  = "audio_root",
+		[PWMDAC_CLK_AUDIO_SRC]   = "audio_src",
+		[PWMDAC_CLK_AUDIO_12288] = "audio_12288",
+		[PWMDAC_CLK_DMA1P_AHB]   = "dma1p_ahb",
+		[PWMDAC_CLK_PWMDAC_APB]  = "pwmdac_apb",
+		[PWMDAC_CLK_DAC_MCLK]    = "dac_mclk",
+	};
+	int i;
+
+	for (i = 0; i < PWMDAC_CLK_NUM; i++)
+		dev->clk[i].id = clock_names[i];
+
+	return devm_clk_bulk_get(&pdev->dev, ARRAY_SIZE(dev->clk), dev->clk);
+}
+
+static int sf_pwmdac_resets_get(struct platform_device *pdev,
+				struct sf_pwmdac_dev *dev)
+{
+	static const char *const reset_names[PWMDAC_RST_NUM] = {
+		[PWMDAC_RST_APB_BUS]    = "apb_bus",
+		[PWMDAC_RST_DMA1P_AHB]  = "dma1p_ahb",
+		[PWMDAC_RST_APB_PWMDAC] = "apb_pwmdac",
+	};
+	int i;
+
+	for (i = 0; i < PWMDAC_RST_NUM; i++)
+		dev->rst[i].id = reset_names[i];
+
+	return devm_reset_control_bulk_get_exclusive(&pdev->dev, ARRAY_SIZE(dev->rst), dev->rst);
+}
+
+static int sf_pwmdac_clk_init(struct platform_device *pdev,
+				struct sf_pwmdac_dev *dev)
+{
+	int ret;
+	int i;
+
+	for (i = 0; i <= PWMDAC_CLK_DMA1P_AHB; i++) {
+		ret = clk_prepare_enable(dev->clk[i].clk);
+		if (ret)
+			return dev_err_probe(&pdev->dev, ret,
+					     "failed to enable %s\n", dev->clk[i].id);
+	}
+
+	for (i = 0; i <= PWMDAC_RST_DMA1P_AHB; i++) {
+		ret = reset_control_deassert(dev->rst[i].rstc);
+		if (ret)
+			return dev_err_probe(&pdev->dev, ret,
+					     "failed to deassert %s\n", dev->rst[i].id);
+	}
+
+	ret = clk_set_rate(dev->clk[PWMDAC_CLK_AUDIO_SRC].clk, 12288000);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "failed to set 12.288 MHz rate for clk_audio_src\n");
+
+	ret = reset_control_assert(dev->rst[PWMDAC_RST_APB_PWMDAC].rstc);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to assert apb_pwmdac\n");
+
+	ret = clk_prepare_enable(dev->clk[PWMDAC_CLK_DAC_MCLK].clk);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to prepare enable clk_dac_mclk\n");
+
+	/* we want 4096kHz but the clock driver always rounds down so add a little slack */
+	ret = clk_set_rate(dev->clk[PWMDAC_CLK_DAC_MCLK].clk, 4096000 + 64);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to set 4096kHz rate for clk_dac_mclk\n");
+
+	ret = clk_prepare_enable(dev->clk[PWMDAC_CLK_PWMDAC_APB].clk);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to prepare enable clk_pwmdac_apb\n");
+
+	ret = reset_control_deassert(dev->rst[PWMDAC_RST_APB_PWMDAC].rstc);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to deassert apb_pwmdac\n");
+
+	return 0;
+}
+
+#define SOC_PWMDAC_ENUM_DECL(xname, xinfo, xget, xput) \
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+	.info = xinfo, .get = xget, \
+	.put = xput,}
+static const struct snd_kcontrol_new pwmdac_snd_controls[] = {
+	SOC_PWMDAC_ENUM_DECL("shift_bit", pwmdac_shift_bit_info,
+		pwmdac_shift_bit_get, pwmdac_shift_bit_put),
+	SOC_PWMDAC_ENUM_DECL("duty_cycle", pwmdac_duty_cycle_info,
+		pwmdac_duty_cycle_get, pwmdac_duty_cycle_put),
+	SOC_PWMDAC_ENUM_DECL("data_mode", pwmdac_data_mode_info,
+		pwmdac_data_mode_get, pwmdac_data_mode_put),
+	SOC_PWMDAC_ENUM_DECL("shift", pwmdac_shift_info,
+		pwmdac_shift_get, pwmdac_shift_put),
+	SOC_PWMDAC_ENUM_DECL("lr_change", pwmdac_lr_change_info,
+		pwmdac_lr_change_get, pwmdac_lr_change_put),
+};
+
+static int pwmdac_probe(struct snd_soc_component *component)
+{
+//	struct sf_pwmdac_dev *priv = snd_soc_component_get_drvdata(component);
+	snd_soc_add_component_controls(component, pwmdac_snd_controls,
+				ARRAY_SIZE(pwmdac_snd_controls));
+	return 0;
+}
+
+static const struct snd_soc_component_driver sf_pwmdac_component = {
+	.name		= "sf-pwmdac",
+	.probe		= pwmdac_probe,
+};
+
+static int sf_pwmdac_dai_probe(struct snd_soc_dai *dai)
+{
+	struct sf_pwmdac_dev *dev = dev_get_drvdata(dai->dev);
+
+	dev->play_dma_data.addr = dev->mapbase + PWMDAC_WDATA;
+	dev->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	dev->play_dma_data.fifo_size = 1;
+	dev->play_dma_data.maxburst = 16;
+
+	snd_soc_dai_init_dma_data(dai, &dev->play_dma_data, NULL);
+	snd_soc_dai_set_drvdata(dai, dev);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops sf_pwmdac_dai_ops = {
+	.probe		= sf_pwmdac_dai_probe,
+	.hw_params	= sf_pwmdac_hw_params,
+	.prepare	= sf_pwmdac_prepare,
+	.trigger	= sf_pwmdac_trigger,
+};
+
+static struct snd_soc_dai_driver pwmdac_dai = {
+	.name = "pwmdac",
+	.id = 0,
+	.playback = {
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_16000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	},
+	.ops = &sf_pwmdac_dai_ops,
+};
+
+static int sf_pwmdac_probe(struct platform_device *pdev)
+{
+	struct sf_pwmdac_dev *dev;
+	struct resource *res;
+	int ret;
+
+	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	dev->mapbase = res->start;
+	dev->pwmdac_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(dev->pwmdac_base))
+		return PTR_ERR(dev->pwmdac_base);
+
+	ret = sf_pwmdac_clks_get(pdev, dev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to get audio clock\n");
+		return ret;
+	}
+
+	ret = sf_pwmdac_resets_get(pdev, dev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to get audio reset controls\n");
+		return ret;
+        }
+
+	ret = sf_pwmdac_clk_init(pdev, dev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to enable audio clock\n");
+		return ret;
+	}
+
+	dev->dev = &pdev->dev;
+	dev->mode = shift_8Bit_inverter;
+	dev->fifo_th = 1;//8byte
+	pwmdac_config(dev);
+
+	dev->use_pio = false;
+	dev_set_drvdata(&pdev->dev, dev);
+	ret = devm_snd_soc_register_component(&pdev->dev, &sf_pwmdac_component,
+					 &pwmdac_dai, 1);
+	if (ret != 0) {
+		dev_err(&pdev->dev, "not able to register dai\n");
+		return ret;
+	}
+
+	if (dev->use_pio) {
+		ret = sf_pwmdac_pcm_register(pdev);
+	} else {
+		ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL,
+				0);
+	}
+	return 0;
+}
+
+
+static void sf_pwmdac_remove(struct platform_device *pdev)
+{
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id sf_pwmdac_of_match[] = {
+	{ .compatible = "starfive,pwmdac",	 },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, sf_pwmdac_of_match);
+#endif
+
+
+static struct platform_driver sf_pwmdac_driver = {
+	.probe		= sf_pwmdac_probe,
+	.remove		= sf_pwmdac_remove,
+	.driver		= {
+		.name	= "sf-pwmdac",
+		.of_match_table = of_match_ptr(sf_pwmdac_of_match),
+	},
+};
+
+module_platform_driver(sf_pwmdac_driver);
+
+MODULE_AUTHOR("jenny.zhang <jenny.zhang@starfivetech.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("starfive pwmdac SoC Interface");
+MODULE_ALIAS("platform:starfive-pwmdac");
diff --git a/sound/soc/starfive/pwmdac.h b/sound/soc/starfive/pwmdac.h
new file mode 100644
index 000000000000..b9f651fc59f1
--- /dev/null
+++ b/sound/soc/starfive/pwmdac.h
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#ifndef __SND_SOC_STARFIVE_PWMDAC_H
+#define __SND_SOC_STARFIVE_PWMDAC_H
+
+#include <linux/clk.h>
+#include <linux/reset.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm.h>
+
+#define PWMDAC_WDATA	0	// PWMDAC_BASE_ADDR
+#define PWMDAC_CTRL	0x04	// PWMDAC_BASE_ADDR + 0x04
+#define PWMDAC_SATAE	0x08	// PWMDAC_BASE_ADDR + 0x08
+#define PWMDAC_RESERVED	0x0C	// PWMDAC_BASE_ADDR + 0x0C
+
+#define SFC_PWMDAC_SHIFT	BIT(1)
+#define SFC_PWMDAC_DUTY_CYCLE	BIT(2)
+#define SFC_PWMDAC_CNT_N	BIT(4)
+
+#define SFC_PWMDAC_LEFT_RIGHT_DATA_CHANGE	BIT(13)
+#define SFC_PWMDAC_DATA_MODE			BIT(14)
+
+#define FIFO_UN_FULL	0
+#define FIFO_FULL	1
+
+enum pwmdac_lr_change{
+	NO_CHANGE = 0,
+	CHANGE,
+};
+
+enum pwmdac_d_mode{
+	UNSINGED_DATA = 0,
+	INVERTER_DATA_MSB,
+};
+
+enum pwmdac_shift_bit{
+	PWMDAC_SHIFT_8 = 8,	/* pwmdac shift 8 bit */
+	PWMDAC_SHIFT_10 = 10,	/* pwmdac shift 10 bit */
+};
+
+enum pwmdac_duty_cycle{
+	PWMDAC_CYCLE_LEFT = 0,		/* pwmdac duty cycle left */
+	PWMDAC_CYCLE_RIGHT = 1,		/* pwmdac duty cycle right */
+	PWMDAC_CYCLE_CENTER = 2,	/* pwmdac duty cycle center */
+};
+
+/*sample count [12:4] <511*/
+enum pwmdac_sample_count{
+	PWMDAC_SAMPLE_CNT_1 = 1,
+	PWMDAC_SAMPLE_CNT_2,
+	PWMDAC_SAMPLE_CNT_3,
+	PWMDAC_SAMPLE_CNT_4,
+	PWMDAC_SAMPLE_CNT_5,
+	PWMDAC_SAMPLE_CNT_6,
+	PWMDAC_SAMPLE_CNT_7,
+	PWMDAC_SAMPLE_CNT_8 = 1,	//(32.468/8) == (12.288/3) == 4.096
+	PWMDAC_SAMPLE_CNT_9,
+	PWMDAC_SAMPLE_CNT_10,
+	PWMDAC_SAMPLE_CNT_11,
+	PWMDAC_SAMPLE_CNT_12,
+	PWMDAC_SAMPLE_CNT_13,
+	PWMDAC_SAMPLE_CNT_14,
+	PWMDAC_SAMPLE_CNT_15,
+	PWMDAC_SAMPLE_CNT_16,
+	PWMDAC_SAMPLE_CNT_17,
+	PWMDAC_SAMPLE_CNT_18,
+	PWMDAC_SAMPLE_CNT_19,
+	PWMDAC_SAMPLE_CNT_20 = 20,
+	PWMDAC_SAMPLE_CNT_30 = 30,
+	PWMDAC_SAMPLE_CNT_511 = 511,
+};
+
+
+enum data_shift{
+	PWMDAC_DATA_LEFT_SHIFT_BIT_0 = 0,
+	PWMDAC_DATA_LEFT_SHIFT_BIT_1,
+	PWMDAC_DATA_LEFT_SHIFT_BIT_2,
+	PWMDAC_DATA_LEFT_SHIFT_BIT_3,
+	PWMDAC_DATA_LEFT_SHIFT_BIT_4,
+	PWMDAC_DATA_LEFT_SHIFT_BIT_5,
+	PWMDAC_DATA_LEFT_SHIFT_BIT_6,
+	PWMDAC_DATA_LEFT_SHIFT_BIT_7,
+	PWMDAC_DATA_LEFT_SHIFT_BIT_ALL,
+};
+
+enum pwmdac_config_list{
+	shift_8Bit_unsigned = 0,
+	shift_8Bit_unsigned_dataShift,
+	shift_10Bit_unsigned,
+	shift_10Bit_unsigned_dataShift,
+
+	shift_8Bit_inverter,
+	shift_8Bit_inverter_dataShift,
+	shift_10Bit_inverter,
+	shift_10Bit_inverter_dataShift,
+};
+
+enum pwmdac_clocks {
+	PWMDAC_CLK_AUDIO_ROOT,
+	PWMDAC_CLK_AUDIO_SRC,
+	PWMDAC_CLK_AUDIO_12288,
+	PWMDAC_CLK_DMA1P_AHB,
+	PWMDAC_CLK_PWMDAC_APB,
+	PWMDAC_CLK_DAC_MCLK,
+	PWMDAC_CLK_NUM,
+};
+
+enum pwmdac_resets {
+	PWMDAC_RST_APB_BUS,
+	PWMDAC_RST_DMA1P_AHB,
+	PWMDAC_RST_APB_PWMDAC,
+	PWMDAC_RST_NUM,
+};
+
+struct sf_pwmdac_dev {
+	void __iomem *pwmdac_base;
+	resource_size_t	mapbase;
+	u8  mode;
+	u8 shift_bit;
+	u8 duty_cycle;
+	u8 datan;
+	u8 data_mode;
+	u8 lr_change;
+	u8 shift;
+	u8 fifo_th;
+	bool use_pio;
+	spinlock_t lock;
+	int active;
+
+	struct clk_bulk_data clk[PWMDAC_CLK_NUM];
+	struct reset_control_bulk_data rst[PWMDAC_RST_NUM];
+
+	struct device *dev;
+	struct snd_dmaengine_dai_dma_data play_dma_data;
+	struct snd_pcm_substream __rcu *tx_substream;
+	unsigned int (*tx_fn)(struct sf_pwmdac_dev *dev,
+			struct snd_pcm_runtime *runtime, unsigned int tx_ptr,
+			bool *period_elapsed);
+	unsigned int tx_ptr;
+	struct task_struct *tx_thread;
+	bool tx_thread_exit;
+};
+
+
+
+#if IS_ENABLED(CONFIG_SND_STARFIVE_PWMDAC_PCM)
+void sf_pwmdac_pcm_push_tx(struct sf_pwmdac_dev *dev);
+int sf_pwmdac_pcm_register(struct platform_device *pdev);
+#else
+static void sf_pwmdac_pcm_push_tx(struct sf_pwmdac_dev *dev) { }
+static int sf_pwmdac_pcm_register(struct platform_device *pdev)
+{
+	return -EINVAL;
+}
+#endif
+
+#endif
diff --git a/sound/soc/starfive/spdif-pcm.c b/sound/soc/starfive/spdif-pcm.c
new file mode 100644
index 000000000000..1763adc19776
--- /dev/null
+++ b/sound/soc/starfive/spdif-pcm.c
@@ -0,0 +1,288 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#include <linux/io.h>
+#include <linux/rcupdate.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#include "spdif.h"
+
+#define BUFFER_BYTES_MAX	(3 * 2 * 8 * PERIOD_BYTES_MIN)
+#define PERIOD_BYTES_MIN	4096
+#define PERIODS_MIN			2
+
+static unsigned int sf_spdif_pcm_tx(struct sf_spdif_dev *dev,
+		struct snd_pcm_runtime *runtime, unsigned int tx_ptr,
+		bool *period_elapsed, snd_pcm_format_t format)
+{
+	const u16 (*p16)[2] = (void *)runtime->dma_area;
+	const u32 (*p32)[2] = (void *)runtime->dma_area;
+	u32 data[2];
+	unsigned int period_pos = tx_ptr % runtime->period_size;
+	int i;
+
+	for (i = 0; i < dev->fifo_th; i++) {
+		if (SNDRV_PCM_FORMAT_S16_LE == format) {
+			data[0] = p16[tx_ptr][0];
+			data[1] = p16[tx_ptr][1];
+			data[0] = data[0]<<8;
+			data[1] = data[1]<<8;
+		} else if (SNDRV_PCM_FORMAT_S24_LE == format) {
+			data[0] = p32[tx_ptr][0];
+			data[1] = p32[tx_ptr][1];
+		} else if (SNDRV_PCM_FORMAT_S32_LE == format) {
+			data[0] = p32[tx_ptr][0];
+			data[1] = p32[tx_ptr][1];
+			data[0] = data[0]>>8;
+			data[1] = data[1]>>8;
+		}
+
+		iowrite32(data[0], dev->spdif_base + SPDIF_FIFO_ADDR);
+		iowrite32(data[1], dev->spdif_base + SPDIF_FIFO_ADDR);
+		period_pos++;
+		if (++tx_ptr >= runtime->buffer_size) {
+			tx_ptr = 0;
+		}
+	}
+
+	*period_elapsed = period_pos >= runtime->period_size;
+	return tx_ptr;
+}
+
+static unsigned int sf_spdif_pcm_rx(struct sf_spdif_dev *dev,
+		struct snd_pcm_runtime *runtime, unsigned int rx_ptr,
+		bool *period_elapsed, snd_pcm_format_t format)
+{
+	u16 (*p16)[2] = (void *)runtime->dma_area;
+	u32 (*p32)[2] = (void *)runtime->dma_area;
+	u32 data[2];
+	unsigned int period_pos = rx_ptr % runtime->period_size;
+	int i;
+
+	for (i = 0; i < dev->fifo_th; i++) {
+		data[0] = ioread32(dev->spdif_base + SPDIF_FIFO_ADDR);
+		data[1] = ioread32(dev->spdif_base + SPDIF_FIFO_ADDR);
+		if (SNDRV_PCM_FORMAT_S16_LE == format) {
+			p16[rx_ptr][0] = data[0]>>8;
+			p16[rx_ptr][1] = data[1]>>8;
+		} else if (SNDRV_PCM_FORMAT_S24_LE == format) {
+			p32[rx_ptr][0] = data[0];
+			p32[rx_ptr][1] = data[1];
+		} else if (SNDRV_PCM_FORMAT_S32_LE == format) {
+			p32[rx_ptr][0] = data[0]<<8;
+			p32[rx_ptr][1] = data[1]<<8;
+		}
+
+		period_pos++;
+		if (++rx_ptr >= runtime->buffer_size)
+			rx_ptr = 0;
+	}
+
+	*period_elapsed = period_pos >= runtime->period_size;
+	return rx_ptr;
+}
+
+static const struct snd_pcm_hardware sf_pcm_hardware = {
+	.info = SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_BLOCK_TRANSFER,
+	.rates = SNDRV_PCM_RATE_8000 |
+		SNDRV_PCM_RATE_11025 |
+		SNDRV_PCM_RATE_16000 |
+		SNDRV_PCM_RATE_22050 |
+		SNDRV_PCM_RATE_32000 |
+		SNDRV_PCM_RATE_44100 |
+		SNDRV_PCM_RATE_48000,
+	.rate_min = 8000,
+	.rate_max = 48000,
+	.formats = SNDRV_PCM_FMTBIT_S16_LE |
+		SNDRV_PCM_FMTBIT_S24_LE |
+		SNDRV_PCM_FMTBIT_S32_LE,
+	.channels_min = 2,
+	.channels_max = 2,
+	.buffer_bytes_max = BUFFER_BYTES_MAX,
+	.period_bytes_min = PERIOD_BYTES_MIN,
+	.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN,
+	.periods_min = PERIODS_MIN,
+	.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN,
+	.fifo_size = 16,
+};
+
+static void sf_spdif_pcm_transfer(struct sf_spdif_dev *dev, bool push)
+{
+	struct snd_pcm_substream *substream;
+	bool active, period_elapsed;
+
+	rcu_read_lock();
+	if (push)
+		substream = rcu_dereference(dev->tx_substream);
+	else
+		substream = rcu_dereference(dev->rx_substream);
+	active = substream && snd_pcm_running(substream);
+	if (active) {
+		unsigned int ptr;
+		unsigned int new_ptr;
+
+		if (push) {
+			ptr = READ_ONCE(dev->tx_ptr);
+			new_ptr = dev->tx_fn(dev, substream->runtime, ptr,
+					&period_elapsed, dev->format);
+			cmpxchg(&dev->tx_ptr, ptr, new_ptr);
+		} else {
+			ptr = READ_ONCE(dev->rx_ptr);
+			new_ptr = dev->rx_fn(dev, substream->runtime, ptr,
+					&period_elapsed, dev->format);
+			cmpxchg(&dev->rx_ptr, ptr, new_ptr);
+		}
+
+		if (period_elapsed)
+			snd_pcm_period_elapsed(substream);
+	}
+	rcu_read_unlock();
+}
+
+void sf_spdif_pcm_push_tx(struct sf_spdif_dev *dev)
+{
+	sf_spdif_pcm_transfer(dev, true);
+}
+
+void sf_spdif_pcm_pop_rx(struct sf_spdif_dev *dev)
+{
+	sf_spdif_pcm_transfer(dev, false);
+}
+
+static int sf_pcm_open(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
+	struct sf_spdif_dev *dev = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0));
+
+	snd_soc_set_runtime_hwparams(substream, &sf_pcm_hardware);
+	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+	runtime->private_data = dev;
+
+	return 0;
+}
+
+static int sf_pcm_close(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream)
+{
+	synchronize_rcu();
+	return 0;
+}
+
+static int sf_pcm_hw_params(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream,
+			struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct sf_spdif_dev *dev = runtime->private_data;
+
+	switch (params_channels(hw_params)) {
+	case 2:
+		break;
+	default:
+		dev_err(dev->dev, "invalid channels number\n");
+		return -EINVAL;
+	}
+
+	dev->format = params_format(hw_params);
+	switch (dev->format) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+	case SNDRV_PCM_FORMAT_S24_LE:
+	case SNDRV_PCM_FORMAT_S32_LE:
+		break;
+	default:
+		dev_err(dev->dev, "invalid format\n");
+		return -EINVAL;
+	}
+
+	dev->tx_fn = sf_spdif_pcm_tx;
+	dev->rx_fn = sf_spdif_pcm_rx;
+
+	return 0;
+}
+
+static int sf_pcm_trigger(struct snd_soc_component *component,
+			struct snd_pcm_substream *substream, int cmd)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct sf_spdif_dev *dev = runtime->private_data;
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			WRITE_ONCE(dev->tx_ptr, 0);
+			rcu_assign_pointer(dev->tx_substream, substream);
+		} else {
+			WRITE_ONCE(dev->rx_ptr, 0);
+			rcu_assign_pointer(dev->rx_substream, substream);
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			rcu_assign_pointer(dev->tx_substream, NULL);
+		else
+			rcu_assign_pointer(dev->rx_substream, NULL);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static snd_pcm_uframes_t sf_pcm_pointer(struct snd_soc_component *component,
+					struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct sf_spdif_dev *dev = runtime->private_data;
+	snd_pcm_uframes_t pos;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		pos = READ_ONCE(dev->tx_ptr);
+	}
+	else {
+		pos = READ_ONCE(dev->rx_ptr);
+	}
+
+	return pos < runtime->buffer_size ? pos : 0;
+}
+
+static int sf_pcm_new(struct snd_soc_component *component,
+			struct snd_soc_pcm_runtime *rtd)
+{
+	size_t size = sf_pcm_hardware.buffer_bytes_max;
+
+	snd_pcm_set_managed_buffer_all(rtd->pcm,
+			SNDRV_DMA_TYPE_CONTINUOUS,
+			NULL, size, size);
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver sf_pcm_component = {
+	.open		= sf_pcm_open,
+	.close		= sf_pcm_close,
+	.hw_params	= sf_pcm_hw_params,
+	.trigger	= sf_pcm_trigger,
+	.pointer	= sf_pcm_pointer,
+	.pcm_construct	= sf_pcm_new,
+};
+
+int sf_spdif_pcm_register(struct platform_device *pdev)
+{
+	return devm_snd_soc_register_component(&pdev->dev, &sf_pcm_component,
+					NULL, 0);
+}
+
diff --git a/sound/soc/starfive/spdif.c b/sound/soc/starfive/spdif.c
new file mode 100644
index 000000000000..f021e99bf7ac
--- /dev/null
+++ b/sound/soc/starfive/spdif.c
@@ -0,0 +1,384 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/clk.h>
+#include <linux/regmap.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "spdif.h"
+
+static irqreturn_t spdif_irq_handler(int irq, void *dev_id)
+{
+	struct sf_spdif_dev *dev = dev_id;
+	bool irq_valid = false;
+	unsigned int intr;
+	unsigned int stat;
+
+	regmap_read(dev->regmap, SPDIF_INT_REG, &intr);
+	regmap_read(dev->regmap, SPDIF_STAT_REG, &stat);
+	regmap_update_bits(dev->regmap, SPDIF_CTRL,
+		SPDIF_MASK_ENABLE, 0);
+	regmap_update_bits(dev->regmap, SPDIF_INT_REG,
+		SPDIF_INT_REG_BIT, 0);
+
+	if ((stat & SPDIF_EMPTY_FLAG) || (stat & SPDIF_AEMPTY_FLAG)) {
+		sf_spdif_pcm_push_tx(dev);
+		irq_valid = true;
+	}
+
+	if ((stat & SPDIF_FULL_FLAG) || (stat & SPDIF_AFULL_FLAG)) {
+		sf_spdif_pcm_pop_rx(dev);
+		irq_valid = true;
+	}
+
+	if (stat & SPDIF_PARITY_FLAG) {
+		irq_valid = true;
+	}
+
+	if (stat & SPDIF_UNDERR_FLAG) {
+		irq_valid = true;
+	}
+
+	if (stat & SPDIF_OVRERR_FLAG) {
+		irq_valid = true;
+	}
+
+	if (stat & SPDIF_SYNCERR_FLAG) {
+		irq_valid = true;
+	}
+
+	if (stat & SPDIF_LOCK_FLAG) {
+		irq_valid = true;
+	}
+
+	if (stat & SPDIF_BEGIN_FLAG) {
+		irq_valid = true;
+	}
+
+	if (stat & SPDIF_RIGHT_LEFT) {
+		irq_valid = true;
+	}
+
+	regmap_update_bits(dev->regmap, SPDIF_CTRL,
+		SPDIF_MASK_ENABLE, SPDIF_MASK_ENABLE);
+
+	if (irq_valid)
+		return IRQ_HANDLED;
+	else
+		return IRQ_NONE;
+}
+
+static int sf_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
+	struct snd_soc_dai *dai)
+{
+	struct sf_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai);
+	bool tx;
+
+	tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	if (tx) {
+		/* tx mode */
+		regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+			SPDIF_TR_MODE, SPDIF_TR_MODE);
+
+		regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+			SPDIF_MASK_FIFO, SPDIF_EMPTY_MASK | SPDIF_AEMPTY_MASK);
+	} else {
+		/* rx mode */
+		regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+			SPDIF_TR_MODE, 0);
+
+		regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+			SPDIF_MASK_FIFO, SPDIF_FULL_MASK | SPDIF_AFULL_MASK);
+	}
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		/* clock recovery form the SPDIF data stream  0:clk_enable */
+		regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+			SPDIF_CLK_ENABLE, 0);
+
+		regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+			SPDIF_ENABLE, SPDIF_ENABLE);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		/* clock recovery form the SPDIF data stream  1:power save mode */
+		regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+			SPDIF_CLK_ENABLE, SPDIF_CLK_ENABLE);
+
+		regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+			SPDIF_ENABLE, 0);
+		break;
+	default:
+		printk(KERN_ERR "%s L.%d cmd:%d\n", __func__, __LINE__, cmd);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int sf_spdif_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+	struct sf_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai);
+	unsigned int channels;
+	unsigned int rate;
+	snd_pcm_format_t format;
+	unsigned int tsamplerate;
+
+	channels = params_channels(params);
+	rate = params_rate(params);
+	format = params_format(params);
+
+	switch (channels) {
+	case 2:
+		break;
+	default:
+		dev_err(dai->dev, "invalid channels number\n");
+		return -EINVAL;
+	}
+
+	switch (format) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+	case SNDRV_PCM_FORMAT_S24_LE:
+	case SNDRV_PCM_FORMAT_S32_LE:
+		break;
+	default:
+		dev_err(spdif->dev, "invalid format\n");
+		return -EINVAL;
+	}
+
+	switch (rate) {
+	case 8000:
+	case 11025:
+	case 16000:
+	case 22050:
+		break;
+	default:
+		printk(KERN_ERR "channel:%d sample rate:%d\n", channels, rate);
+		return -EINVAL;
+	}
+
+	/* 12288000/128=96000 */
+	tsamplerate = (96000 + rate/2)/rate - 1;
+
+	if (rate < 3) {
+		return -EINVAL;
+	}
+
+	/* transmission sample rate */
+	regmap_update_bits(spdif->regmap, SPDIF_CTRL, 0xFF, tsamplerate);
+
+	return 0;
+}
+
+static int sf_spdif_dai_probe(struct snd_soc_dai *dai)
+{
+	struct sf_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai);
+
+	#if 0
+	spdif->play_dma_data.addr = (dma_addr_t)spdif->spdif_base + SPDIF_FIFO_ADDR;
+	spdif->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	spdif->play_dma_data.fifo_size = 16;
+	spdif->play_dma_data.maxburst = 16;
+	spdif->capture_dma_data.addr = (dma_addr_t)spdif->spdif_base + SPDIF_FIFO_ADDR;
+	spdif->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	spdif->capture_dma_data.fifo_size = 16;
+	spdif->capture_dma_data.maxburst = 16;
+	snd_soc_dai_init_dma_data(dai, &spdif->play_dma_data, &spdif->capture_dma_data);
+	snd_soc_dai_set_drvdata(dai, spdif);
+	#endif
+
+	/* reset */
+	regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+		SPDIF_ENABLE | SPDIF_SFR_ENABLE | SPDIF_FIFO_ENABLE, 0);
+
+	/* clear irq */
+	regmap_update_bits(spdif->regmap, SPDIF_INT_REG,
+		SPDIF_INT_REG_BIT, 0);
+
+	/* power save mode */
+	regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+		SPDIF_CLK_ENABLE, SPDIF_CLK_ENABLE);
+
+	/* power save mode */
+	regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+		SPDIF_CLK_ENABLE, SPDIF_CLK_ENABLE);
+
+	regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+		SPDIF_PARITCHECK|SPDIF_VALIDITYCHECK|SPDIF_DUPLICATE,
+		SPDIF_PARITCHECK|SPDIF_VALIDITYCHECK|SPDIF_DUPLICATE);
+
+	regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+		SPDIF_SETPREAMBB, SPDIF_SETPREAMBB);
+
+	regmap_update_bits(spdif->regmap, SPDIF_INT_REG,
+		0x1FFF<<SPDIF_PREAMBLEDEL, 0x3<<SPDIF_PREAMBLEDEL);
+
+	regmap_update_bits(spdif->regmap, SPDIF_FIFO_CTRL,
+		0xFFFFFFFF, 0x20|(0x20<<SPDIF_AFULL_THRESHOLD));
+
+	regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+		SPDIF_PARITYGEN, SPDIF_PARITYGEN);
+
+	regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+		SPDIF_MASK_ENABLE, SPDIF_MASK_ENABLE);
+
+	/* APB access to FIFO enable, disable if use DMA/FIFO */
+	regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+		SPDIF_USE_FIFO_IF, 0);
+
+	/* two channel */
+	regmap_update_bits(spdif->regmap, SPDIF_CTRL,
+		SPDIF_CHANNEL_MODE, 0);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops sf_spdif_dai_ops = {
+	.probe = sf_spdif_dai_probe,
+	.trigger = sf_spdif_trigger,
+	.hw_params = sf_spdif_hw_params,
+};
+
+#define SF_PCM_RATE_44100_192000  (SNDRV_PCM_RATE_44100 | \
+									SNDRV_PCM_RATE_48000 | \
+									SNDRV_PCM_RATE_96000 | \
+									SNDRV_PCM_RATE_192000)
+
+#define SF_PCM_RATE_8000_22050  (SNDRV_PCM_RATE_8000 | \
+									SNDRV_PCM_RATE_11025 | \
+									SNDRV_PCM_RATE_16000 | \
+									SNDRV_PCM_RATE_22050)
+
+static struct snd_soc_dai_driver sf_spdif_dai = {
+	.name = "spdif",
+	.id = 0,
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SF_PCM_RATE_8000_22050,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE \
+					|SNDRV_PCM_FMTBIT_S24_LE \
+					|SNDRV_PCM_FMTBIT_S32_LE,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SF_PCM_RATE_8000_22050,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE \
+					|SNDRV_PCM_FMTBIT_S24_LE \
+					|SNDRV_PCM_FMTBIT_S32_LE,
+	},
+	.ops = &sf_spdif_dai_ops,
+	.symmetric_rate = 1,
+};
+
+static const struct snd_soc_component_driver sf_spdif_component = {
+	.name = "sf-spdif",
+};
+
+static const struct regmap_config sf_spdif_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = 0x200,
+};
+
+static int sf_spdif_probe(struct platform_device *pdev)
+{
+	struct sf_spdif_dev *spdif;
+	struct resource *res;
+	void __iomem *base;
+	int ret;
+	int irq;
+
+	spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);
+	if (!spdif)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, spdif);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	spdif->spdif_base = base;
+	spdif->regmap = devm_regmap_init_mmio(&pdev->dev, spdif->spdif_base,
+					&sf_spdif_regmap_config);
+	if (IS_ERR(spdif->regmap))
+		return PTR_ERR(spdif->regmap);
+
+	spdif->dev = &pdev->dev;
+	spdif->fifo_th = 16;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq >= 0) {
+		ret = devm_request_irq(&pdev->dev, irq, spdif_irq_handler, 0,
+				pdev->name, spdif);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "failed to request irq\n");
+			return ret;
+		}
+	}
+
+	ret = devm_snd_soc_register_component(&pdev->dev, &sf_spdif_component,
+					 &sf_spdif_dai, 1);
+	if (ret)
+		goto err_clk_disable;
+
+	if (irq >= 0) {
+		ret = sf_spdif_pcm_register(pdev);
+		spdif->use_pio = true;
+	} else {
+		ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL,
+					0);
+		spdif->use_pio = false;
+	}
+
+	if (ret)
+		goto err_clk_disable;
+
+	return 0;
+
+err_clk_disable:
+	return ret;
+}
+
+static const struct of_device_id sf_spdif_of_match[] = {
+	{ .compatible = "starfive,sf-spdif", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, sf_spdif_of_match);
+
+static struct platform_driver sf_spdif_driver = {
+	.driver = {
+		.name = "sf-spdif",
+		.of_match_table = sf_spdif_of_match,
+	},
+	.probe = sf_spdif_probe,
+};
+module_platform_driver(sf_spdif_driver);
+
+MODULE_AUTHOR("michael.yan <michael.yan@starfive.com>");
+MODULE_DESCRIPTION("starfive SPDIF driver");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/starfive/spdif.h b/sound/soc/starfive/spdif.h
new file mode 100644
index 000000000000..b9b856db701b
--- /dev/null
+++ b/sound/soc/starfive/spdif.h
@@ -0,0 +1,154 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ */
+#ifndef __SND_SOC_STARFIVE_SPDIF_H
+#define __SND_SOC_STARFIVE_SPDIF_H
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm.h>
+#include <linux/dmaengine.h>
+#include <linux/types.h>
+
+#define SPDIF_CTRL		(0x0)
+#define SPDIF_INT_REG		(0x4)
+#define SPDIF_FIFO_CTRL		(0x8)
+#define SPDIF_STAT_REG		(0xC)
+
+#define SPDIF_FIFO_ADDR		(0x100)
+#define DMAC_SPDIF_POLLING_LEN	(256)
+
+///ctrl: sampled on the rising clock edge
+#define SPDIF_TSAMPLERATE	0///[SRATEW-1:0]
+#define SPDIF_SFR_ENABLE	(1<<8)	///0:SFR reg reset to defualt value; auto set back to '1' after reset
+#define SPDIF_ENABLE		(1<<9)	///0:reset of SPDIF block, SRF bits are unchanged; 1:enables SPDIF module
+#define SPDIF_FIFO_ENABLE	(1<<10)	///0:FIFO pointers are reset to zero,threshold levels for FIFO are unchaned; auto set back to '1'
+#define SPDIF_CLK_ENABLE	(1<<11)	///1:blocked and the modules are in power save mode; 0:block feeds the modules
+#define SPDIF_TR_MODE		(1<<12)	///0:rx; 1:tx
+#define SPDIF_PARITCHECK	(1<<13)	///0:party bit rx in a sub-frame is repeated on the parity; 1:check on a parity error
+#define SPDIF_PARITYGEN		(1<<14)	///0:parity bit from FIFO is transmitted in sub-frame;1:parity bit generated inside the core and added to a transmitted sub-frame
+#define SPDIF_VALIDITYCHECK	(1<<15)	///0:validity bit in frame isn't checked and all frame are written; 1:validity bit rx is checked
+#define SPDIF_CHANNEL_MODE	(1<<16)	///0:two-channel; 1:single-channel
+#define SPDIF_DUPLICATE		(1<<17)	///only tx -single-channel mode; 0:secondary channel; 1: left(primary) channel
+#define SPDIF_SETPREAMBB	(1<<18)	///only tx; 0:first preamble B after reset tx valid sub-frame; 1:first preamble B is tx after preambleddel(INT_REG)
+#define SPDIF_USE_FIFO_IF	(1<<19)	///0:FIFO disabled ,APB accese FIFO; 1:FIFO enable, APB access to FIFO disable;
+///#define RESERVED		(1<<20)
+#define SPDIF_PARITY_MASK	(1<<21)
+#define SPDIF_UNDERR_MASK	(1<<22)
+#define SPDIF_OVRERR_MASK	(1<<23)
+#define SPDIF_EMPTY_MASK	(1<<24)
+#define SPDIF_AEMPTY_MASK	(1<<25)
+#define SPDIF_FULL_MASK		(1<<26)
+#define SPDIF_AFULL_MASK	(1<<27)
+#define SPDIF_SYNCERR_MASK	(1<<28)
+#define SPDIF_LOCK_MASK		(1<<29)
+#define SPDIF_BEGIN_MASK	(1<<30)
+#define SPDIF_INTEREQ_MAKS	(1<<31)
+
+#define SPDIF_MASK_ENABLE	(SPDIF_PARITY_MASK | SPDIF_UNDERR_MASK | SPDIF_OVRERR_MASK | SPDIF_EMPTY_MASK |	\
+							 SPDIF_AEMPTY_MASK | SPDIF_FULL_MASK | SPDIF_AFULL_MASK | SPDIF_SYNCERR_MASK |	\
+							 SPDIF_LOCK_MASK | SPDIF_BEGIN_MASK | SPDIF_INTEREQ_MAKS)
+
+#define SPDIF_MASK_FIFO		(SPDIF_EMPTY_MASK | SPDIF_AEMPTY_MASK | SPDIF_FULL_MASK | SPDIF_AFULL_MASK)
+
+////INT_REG
+#define SPDIF_RSAMPLERATE	0		///[SRATEW-1:0]
+#define SPDIF_PREAMBLEDEL	8		///[PDELAYW+7:8]	first B delay
+#define SPDIF_PARITYO		(1<<21)	///0:clear parity error
+#define SPDIF_TDATA_UNDERR	(1<<22)	///tx data underrun error;0:clear
+#define SPDIF_RDATA_OVRERR	(1<<23)	///rx data overrun error; 0:clear
+#define SPDIF_FIFO_EMPTY	(1<<24)	///empty; 0:clear
+#define SPDIF_FIOF_AEMPTY	(1<<25)	///almost empty; 0:clear
+#define SPDIF_FIFO_FULL		(1<<26)	///FIFO full; 0:clear
+#define SPDIF_FIFO_AFULL	(1<<27)	///FIFO almost full; 0:clear
+#define SPDIF_SYNCERR		(1<<28)	///sync error; 0:clear
+#define SPDIF_LOCK			(1<<29)	///sync; 0:clear
+#define SPDIF_BLOCK_BEGIN	(1<<30)	///new start block rx data
+
+#define SPDIF_INT_REG_BIT	(SPDIF_PARITYO | SPDIF_TDATA_UNDERR | SPDIF_RDATA_OVRERR | SPDIF_FIFO_EMPTY |	\
+							 SPDIF_FIOF_AEMPTY | SPDIF_FIFO_FULL | SPDIF_FIFO_AFULL | SPDIF_SYNCERR | 	\
+							 SPDIF_LOCK | SPDIF_BLOCK_BEGIN)
+
+#define SPDIF_ERROR_INT_STATUS	(SPDIF_PARITYO | SPDIF_TDATA_UNDERR | SPDIF_RDATA_OVRERR)
+#define SPDIF_FIFO_INT_STATUS	(SPDIF_FIFO_EMPTY | SPDIF_FIOF_AEMPTY | SPDIF_FIFO_FULL | SPDIF_FIFO_AFULL)
+
+#define SPDIF_INT_PARITY_ERROR	(-1)
+#define SPDIF_INT_TDATA_UNDERR	(-2)
+#define SPDIF_INT_RDATA_OVRERR	(-3)
+#define SPDIF_INT_FIFO_EMPTY	1
+#define SPDIF_INT_FIFO_AEMPTY	2
+#define SPDIF_INT_FIFO_FULL	3
+#define SPDIF_INT_FIFO_AFULL	4
+#define SPDIF_INT_SYNCERR	(-4)
+#define SPDIF_INT_LOCK		5	// reciever has become synchronized with input data stream
+#define SPDIF_INT_BLOCK_BEGIN	6	// start a new block in recieve data, written into FIFO
+
+///FIFO_CTRL
+#define SPDIF_AEMPTY_THRESHOLD	0	// [depth-1:0]
+#define SPDIF_AFULL_THRESHOLD	16	// [depth+15:16]
+
+///STAT_REG
+#define SPDIF_FIFO_LEVEL	(1<<0)
+#define SPDIF_PARITY_FLAG	(1<<21)	// 1:error; 0:repeated
+#define SPDIF_UNDERR_FLAG	(1<<22)	// 1:error
+#define SPDIF_OVRERR_FLAG	(1<<23)	// 1:error
+#define SPDIF_EMPTY_FLAG	(1<<24)	// 1:fifo empty
+#define SPDIF_AEMPTY_FLAG	(1<<25)	// 1:fifo almost empty
+#define SPDIF_FULL_FLAG		(1<<26)	// 1:fifo full
+#define SPDIF_AFULL_FLAG	(1<<27)	// 1:fifo almost full
+#define SPDIF_SYNCERR_FLAG	(1<<28)	// 1:rx sync error
+#define SPDIF_LOCK_FLAG		(1<<29)	// 1:RX sync
+#define SPDIF_BEGIN_FLAG	(1<<30)	// 1:start a new block
+#define SPDIF_RIGHT_LEFT	(1<<31)	// 1:left channel received and tx into FIFO; 0:right channel received and tx into FIFO
+
+#define SPDIF_STAT		(SPDIF_PARITY_FLAG | SPDIF_UNDERR_FLAG | SPDIF_OVRERR_FLAG | SPDIF_EMPTY_FLAG |		\
+						 SPDIF_AEMPTY_FLAG | SPDIF_FULL_FLAG | SPDIF_AFULL_FLAG | SPDIF_SYNCERR_FLAG | 		\
+						 SPDIF_LOCK_FLAG | SPDIF_BEGIN_FLAG | SPDIF_RIGHT_LEFT)
+struct sf_spdif_dev {
+	void __iomem *spdif_base;
+	struct regmap *regmap;
+	struct device *dev;
+	u32 fifo_th;
+	int active;
+
+	/* data related to DMA transfers b/w i2s and DMAC */
+	struct snd_dmaengine_dai_dma_data play_dma_data;
+	struct snd_dmaengine_dai_dma_data capture_dma_data;
+
+	bool use_pio;
+	struct snd_pcm_substream __rcu *tx_substream;
+	struct snd_pcm_substream __rcu *rx_substream;
+
+	unsigned int (*tx_fn)(struct sf_spdif_dev *dev,
+			struct snd_pcm_runtime *runtime, unsigned int tx_ptr,
+			bool *period_elapsed, snd_pcm_format_t format);
+	unsigned int (*rx_fn)(struct sf_spdif_dev *dev,
+			struct snd_pcm_runtime *runtime, unsigned int rx_ptr,
+			bool *period_elapsed, snd_pcm_format_t format);
+
+	snd_pcm_format_t format;
+	//unsigned int sample_bits;
+	unsigned int tx_ptr;
+	unsigned int rx_ptr;
+
+	struct snd_dmaengine_dai_dma_data dma_data;
+};
+
+#if IS_ENABLED(CONFIG_SND_STARFIVE_SPDIF_PCM)
+void sf_spdif_pcm_push_tx(struct sf_spdif_dev *dev);
+void sf_spdif_pcm_pop_rx(struct sf_spdif_dev *dev);
+int sf_spdif_pcm_register(struct platform_device *pdev);
+#else
+static inline void sf_spdif_pcm_push_tx(struct sf_spdif_dev *dev) { }
+static inline void sf_spdif_pcm_pop_rx(struct sf_spdif_dev *dev) { }
+static inline int sf_spdif_pcm_register(struct platform_device *pdev)
+{
+	return -EINVAL;
+}
+#endif
+
+
+#endif	/* __SND_SOC_STARFIVE_SPDIF_H */