Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

12 files changed, 2813 insertions, 0 deletions

diff --git a/sound/soc/mediatek/common/Makefile b/sound/soc/mediatek/common/Makefile
new file mode 100644
index 000000000..42e636c10
--- /dev/null
+++ b/sound/soc/mediatek/common/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+# platform driver
+snd-soc-mtk-common-objs := mtk-afe-platform-driver.o mtk-afe-fe-dai.o mtk-dsp-sof-common.o mtk-soundcard-driver.o
+obj-$(CONFIG_SND_SOC_MEDIATEK) += snd-soc-mtk-common.o
+
+obj-$(CONFIG_SND_SOC_MTK_BTCVSD) += mtk-btcvsd.o
diff --git a/sound/soc/mediatek/common/mtk-afe-fe-dai.c b/sound/soc/mediatek/common/mtk-afe-fe-dai.c
new file mode 100644
index 000000000..395be97f1
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-afe-fe-dai.c
@@ -0,0 +1,612 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mtk-afe-fe-dais.c  --  Mediatek afe fe dai operator
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@mediatek.com>
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+#include "mtk-afe-platform-driver.h"
+#include <sound/pcm_params.h>
+#include "mtk-afe-fe-dai.h"
+#include "mtk-base-afe.h"
+
+#define AFE_BASE_END_OFFSET 8
+
+static int mtk_regmap_update_bits(struct regmap *map, int reg,
+			   unsigned int mask,
+			   unsigned int val, int shift)
+{
+	if (reg < 0 || WARN_ON_ONCE(shift < 0))
+		return 0;
+	return regmap_update_bits(map, reg, mask << shift, val << shift);
+}
+
+static int mtk_regmap_write(struct regmap *map, int reg, unsigned int val)
+{
+	if (reg < 0)
+		return 0;
+	return regmap_write(map, reg, val);
+}
+
+int mtk_afe_fe_startup(struct snd_pcm_substream *substream,
+		       struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int memif_num = asoc_rtd_to_cpu(rtd, 0)->id;
+	struct mtk_base_afe_memif *memif = &afe->memif[memif_num];
+	const struct snd_pcm_hardware *mtk_afe_hardware = afe->mtk_afe_hardware;
+	int ret;
+
+	memif->substream = substream;
+
+	snd_pcm_hw_constraint_step(substream->runtime, 0,
+				   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 16);
+	/* enable agent */
+	mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
+			       1, 0, memif->data->agent_disable_shift);
+
+	snd_soc_set_runtime_hwparams(substream, mtk_afe_hardware);
+
+	/*
+	 * Capture cannot use ping-pong buffer since hw_ptr at IRQ may be
+	 * smaller than period_size due to AFE's internal buffer.
+	 * This easily leads to overrun when avail_min is period_size.
+	 * One more period can hold the possible unread buffer.
+	 */
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+		int periods_max = mtk_afe_hardware->periods_max;
+
+		ret = snd_pcm_hw_constraint_minmax(runtime,
+						   SNDRV_PCM_HW_PARAM_PERIODS,
+						   3, periods_max);
+		if (ret < 0) {
+			dev_err(afe->dev, "hw_constraint_minmax failed\n");
+			return ret;
+		}
+	}
+
+	ret = snd_pcm_hw_constraint_integer(runtime,
+					    SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0)
+		dev_err(afe->dev, "snd_pcm_hw_constraint_integer failed\n");
+
+	/* dynamic allocate irq to memif */
+	if (memif->irq_usage < 0) {
+		int irq_id = mtk_dynamic_irq_acquire(afe);
+
+		if (irq_id != afe->irqs_size) {
+			/* link */
+			memif->irq_usage = irq_id;
+		} else {
+			dev_err(afe->dev, "%s() error: no more asys irq\n",
+				__func__);
+			ret = -EBUSY;
+		}
+	}
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_startup);
+
+void mtk_afe_fe_shutdown(struct snd_pcm_substream *substream,
+			 struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+	struct mtk_base_afe_memif *memif = &afe->memif[asoc_rtd_to_cpu(rtd, 0)->id];
+	int irq_id;
+
+	irq_id = memif->irq_usage;
+
+	mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
+			       1, 1, memif->data->agent_disable_shift);
+
+	if (!memif->const_irq) {
+		mtk_dynamic_irq_release(afe, irq_id);
+		memif->irq_usage = -1;
+		memif->substream = NULL;
+	}
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_shutdown);
+
+int mtk_afe_fe_hw_params(struct snd_pcm_substream *substream,
+			 struct snd_pcm_hw_params *params,
+			 struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+	int id = asoc_rtd_to_cpu(rtd, 0)->id;
+	struct mtk_base_afe_memif *memif = &afe->memif[id];
+	int ret;
+	unsigned int channels = params_channels(params);
+	unsigned int rate = params_rate(params);
+	snd_pcm_format_t format = params_format(params);
+
+	if (afe->request_dram_resource)
+		afe->request_dram_resource(afe->dev);
+
+	dev_dbg(afe->dev, "%s(), %s, ch %d, rate %d, fmt %d, dma_addr %pad, dma_area %p, dma_bytes 0x%zx\n",
+		__func__, memif->data->name,
+		channels, rate, format,
+		&substream->runtime->dma_addr,
+		substream->runtime->dma_area,
+		substream->runtime->dma_bytes);
+
+	memset_io((void __force __iomem *)substream->runtime->dma_area, 0,
+		  substream->runtime->dma_bytes);
+
+	/* set addr */
+	ret = mtk_memif_set_addr(afe, id,
+				 substream->runtime->dma_area,
+				 substream->runtime->dma_addr,
+				 substream->runtime->dma_bytes);
+	if (ret) {
+		dev_err(afe->dev, "%s(), error, id %d, set addr, ret %d\n",
+			__func__, id, ret);
+		return ret;
+	}
+
+	/* set channel */
+	ret = mtk_memif_set_channel(afe, id, channels);
+	if (ret) {
+		dev_err(afe->dev, "%s(), error, id %d, set channel %d, ret %d\n",
+			__func__, id, channels, ret);
+		return ret;
+	}
+
+	/* set rate */
+	ret = mtk_memif_set_rate_substream(substream, id, rate);
+	if (ret) {
+		dev_err(afe->dev, "%s(), error, id %d, set rate %d, ret %d\n",
+			__func__, id, rate, ret);
+		return ret;
+	}
+
+	/* set format */
+	ret = mtk_memif_set_format(afe, id, format);
+	if (ret) {
+		dev_err(afe->dev, "%s(), error, id %d, set format %d, ret %d\n",
+			__func__, id, format, ret);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_params);
+
+int mtk_afe_fe_hw_free(struct snd_pcm_substream *substream,
+		       struct snd_soc_dai *dai)
+{
+	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+
+	if (afe->release_dram_resource)
+		afe->release_dram_resource(afe->dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_free);
+
+int mtk_afe_fe_trigger(struct snd_pcm_substream *substream, int cmd,
+		       struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct snd_pcm_runtime * const runtime = substream->runtime;
+	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+	int id = asoc_rtd_to_cpu(rtd, 0)->id;
+	struct mtk_base_afe_memif *memif = &afe->memif[id];
+	struct mtk_base_afe_irq *irqs = &afe->irqs[memif->irq_usage];
+	const struct mtk_base_irq_data *irq_data = irqs->irq_data;
+	unsigned int counter = runtime->period_size;
+	int fs;
+	int ret;
+
+	dev_dbg(afe->dev, "%s %s cmd=%d\n", __func__, memif->data->name, cmd);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		ret = mtk_memif_set_enable(afe, id);
+		if (ret) {
+			dev_err(afe->dev, "%s(), error, id %d, memif enable, ret %d\n",
+				__func__, id, ret);
+			return ret;
+		}
+
+		/* set irq counter */
+		mtk_regmap_update_bits(afe->regmap, irq_data->irq_cnt_reg,
+				       irq_data->irq_cnt_maskbit, counter,
+				       irq_data->irq_cnt_shift);
+
+		/* set irq fs */
+		fs = afe->irq_fs(substream, runtime->rate);
+
+		if (fs < 0)
+			return -EINVAL;
+
+		mtk_regmap_update_bits(afe->regmap, irq_data->irq_fs_reg,
+				       irq_data->irq_fs_maskbit, fs,
+				       irq_data->irq_fs_shift);
+
+		/* enable interrupt */
+		mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
+				       1, 1, irq_data->irq_en_shift);
+
+		return 0;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		ret = mtk_memif_set_disable(afe, id);
+		if (ret) {
+			dev_err(afe->dev, "%s(), error, id %d, memif enable, ret %d\n",
+				__func__, id, ret);
+		}
+
+		/* disable interrupt */
+		mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
+				       1, 0, irq_data->irq_en_shift);
+		/* and clear pending IRQ */
+		mtk_regmap_write(afe->regmap, irq_data->irq_clr_reg,
+				 1 << irq_data->irq_clr_shift);
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_trigger);
+
+int mtk_afe_fe_prepare(struct snd_pcm_substream *substream,
+		       struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd  = asoc_substream_to_rtd(substream);
+	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+	int id = asoc_rtd_to_cpu(rtd, 0)->id;
+	int pbuf_size;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		if (afe->get_memif_pbuf_size) {
+			pbuf_size = afe->get_memif_pbuf_size(substream);
+			mtk_memif_set_pbuf_size(afe, id, pbuf_size);
+		}
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_prepare);
+
+const struct snd_soc_dai_ops mtk_afe_fe_ops = {
+	.startup	= mtk_afe_fe_startup,
+	.shutdown	= mtk_afe_fe_shutdown,
+	.hw_params	= mtk_afe_fe_hw_params,
+	.hw_free	= mtk_afe_fe_hw_free,
+	.prepare	= mtk_afe_fe_prepare,
+	.trigger	= mtk_afe_fe_trigger,
+};
+EXPORT_SYMBOL_GPL(mtk_afe_fe_ops);
+
+int mtk_dynamic_irq_acquire(struct mtk_base_afe *afe)
+{
+	int i;
+
+	mutex_lock(&afe->irq_alloc_lock);
+	for (i = 0; i < afe->irqs_size; ++i) {
+		if (afe->irqs[i].irq_occupyed == 0) {
+			afe->irqs[i].irq_occupyed = 1;
+			mutex_unlock(&afe->irq_alloc_lock);
+			return i;
+		}
+	}
+	mutex_unlock(&afe->irq_alloc_lock);
+	return afe->irqs_size;
+}
+EXPORT_SYMBOL_GPL(mtk_dynamic_irq_acquire);
+
+int mtk_dynamic_irq_release(struct mtk_base_afe *afe, int irq_id)
+{
+	mutex_lock(&afe->irq_alloc_lock);
+	if (irq_id >= 0 && irq_id < afe->irqs_size) {
+		afe->irqs[irq_id].irq_occupyed = 0;
+		mutex_unlock(&afe->irq_alloc_lock);
+		return 0;
+	}
+	mutex_unlock(&afe->irq_alloc_lock);
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(mtk_dynamic_irq_release);
+
+int mtk_afe_suspend(struct snd_soc_component *component)
+{
+	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
+	struct device *dev = afe->dev;
+	struct regmap *regmap = afe->regmap;
+	int i;
+
+	if (pm_runtime_status_suspended(dev) || afe->suspended)
+		return 0;
+
+	if (!afe->reg_back_up)
+		afe->reg_back_up =
+			devm_kcalloc(dev, afe->reg_back_up_list_num,
+				     sizeof(unsigned int), GFP_KERNEL);
+
+	if (afe->reg_back_up) {
+		for (i = 0; i < afe->reg_back_up_list_num; i++)
+			regmap_read(regmap, afe->reg_back_up_list[i],
+				    &afe->reg_back_up[i]);
+	}
+
+	afe->suspended = true;
+	afe->runtime_suspend(dev);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_suspend);
+
+int mtk_afe_resume(struct snd_soc_component *component)
+{
+	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
+	struct device *dev = afe->dev;
+	struct regmap *regmap = afe->regmap;
+	int i;
+
+	if (pm_runtime_status_suspended(dev) || !afe->suspended)
+		return 0;
+
+	afe->runtime_resume(dev);
+
+	if (!afe->reg_back_up) {
+		dev_dbg(dev, "%s no reg_backup\n", __func__);
+	} else {
+		for (i = 0; i < afe->reg_back_up_list_num; i++)
+			mtk_regmap_write(regmap, afe->reg_back_up_list[i],
+					 afe->reg_back_up[i]);
+	}
+
+	afe->suspended = false;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_resume);
+
+int mtk_memif_set_enable(struct mtk_base_afe *afe, int id)
+{
+	struct mtk_base_afe_memif *memif = &afe->memif[id];
+
+	if (memif->data->enable_shift < 0) {
+		dev_warn(afe->dev, "%s(), error, id %d, enable_shift < 0\n",
+			 __func__, id);
+		return 0;
+	}
+	return mtk_regmap_update_bits(afe->regmap, memif->data->enable_reg,
+				      1, 1, memif->data->enable_shift);
+}
+EXPORT_SYMBOL_GPL(mtk_memif_set_enable);
+
+int mtk_memif_set_disable(struct mtk_base_afe *afe, int id)
+{
+	struct mtk_base_afe_memif *memif = &afe->memif[id];
+
+	if (memif->data->enable_shift < 0) {
+		dev_warn(afe->dev, "%s(), error, id %d, enable_shift < 0\n",
+			 __func__, id);
+		return 0;
+	}
+	return mtk_regmap_update_bits(afe->regmap, memif->data->enable_reg,
+				      1, 0, memif->data->enable_shift);
+}
+EXPORT_SYMBOL_GPL(mtk_memif_set_disable);
+
+int mtk_memif_set_addr(struct mtk_base_afe *afe, int id,
+		       unsigned char *dma_area,
+		       dma_addr_t dma_addr,
+		       size_t dma_bytes)
+{
+	struct mtk_base_afe_memif *memif = &afe->memif[id];
+	int msb_at_bit33 = upper_32_bits(dma_addr) ? 1 : 0;
+	unsigned int phys_buf_addr = lower_32_bits(dma_addr);
+	unsigned int phys_buf_addr_upper_32 = upper_32_bits(dma_addr);
+
+	memif->dma_area = dma_area;
+	memif->dma_addr = dma_addr;
+	memif->dma_bytes = dma_bytes;
+
+	/* start */
+	mtk_regmap_write(afe->regmap, memif->data->reg_ofs_base,
+			 phys_buf_addr);
+	/* end */
+	if (memif->data->reg_ofs_end)
+		mtk_regmap_write(afe->regmap,
+				 memif->data->reg_ofs_end,
+				 phys_buf_addr + dma_bytes - 1);
+	else
+		mtk_regmap_write(afe->regmap,
+				 memif->data->reg_ofs_base +
+				 AFE_BASE_END_OFFSET,
+				 phys_buf_addr + dma_bytes - 1);
+
+	/* set start, end, upper 32 bits */
+	if (memif->data->reg_ofs_base_msb) {
+		mtk_regmap_write(afe->regmap, memif->data->reg_ofs_base_msb,
+				 phys_buf_addr_upper_32);
+		mtk_regmap_write(afe->regmap,
+				 memif->data->reg_ofs_end_msb,
+				 phys_buf_addr_upper_32);
+	}
+
+	/*
+	 * set MSB to 33-bit, for memif address
+	 * only for memif base address, if msb_end_reg exists
+	 */
+	if (memif->data->msb_reg)
+		mtk_regmap_update_bits(afe->regmap, memif->data->msb_reg,
+				       1, msb_at_bit33, memif->data->msb_shift);
+
+	/* set MSB to 33-bit, for memif end address */
+	if (memif->data->msb_end_reg)
+		mtk_regmap_update_bits(afe->regmap, memif->data->msb_end_reg,
+				       1, msb_at_bit33,
+				       memif->data->msb_end_shift);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_memif_set_addr);
+
+int mtk_memif_set_channel(struct mtk_base_afe *afe,
+			  int id, unsigned int channel)
+{
+	struct mtk_base_afe_memif *memif = &afe->memif[id];
+	unsigned int mono;
+
+	if (memif->data->mono_shift < 0)
+		return 0;
+
+	if (memif->data->quad_ch_mask) {
+		unsigned int quad_ch = (channel == 4) ? 1 : 0;
+
+		mtk_regmap_update_bits(afe->regmap, memif->data->quad_ch_reg,
+				       memif->data->quad_ch_mask,
+				       quad_ch, memif->data->quad_ch_shift);
+	}
+
+	if (memif->data->mono_invert)
+		mono = (channel == 1) ? 0 : 1;
+	else
+		mono = (channel == 1) ? 1 : 0;
+
+	/* for specific configuration of memif mono mode */
+	if (memif->data->int_odd_flag_reg)
+		mtk_regmap_update_bits(afe->regmap,
+				       memif->data->int_odd_flag_reg,
+				       1, mono,
+				       memif->data->int_odd_flag_shift);
+
+	return mtk_regmap_update_bits(afe->regmap, memif->data->mono_reg,
+				      1, mono, memif->data->mono_shift);
+}
+EXPORT_SYMBOL_GPL(mtk_memif_set_channel);
+
+static int mtk_memif_set_rate_fs(struct mtk_base_afe *afe,
+				 int id, int fs)
+{
+	struct mtk_base_afe_memif *memif = &afe->memif[id];
+
+	if (memif->data->fs_shift >= 0)
+		mtk_regmap_update_bits(afe->regmap, memif->data->fs_reg,
+				       memif->data->fs_maskbit,
+				       fs, memif->data->fs_shift);
+
+	return 0;
+}
+
+int mtk_memif_set_rate(struct mtk_base_afe *afe,
+		       int id, unsigned int rate)
+{
+	int fs = 0;
+
+	if (!afe->get_dai_fs) {
+		dev_err(afe->dev, "%s(), error, afe->get_dai_fs == NULL\n",
+			__func__);
+		return -EINVAL;
+	}
+
+	fs = afe->get_dai_fs(afe, id, rate);
+
+	if (fs < 0)
+		return -EINVAL;
+
+	return mtk_memif_set_rate_fs(afe, id, fs);
+}
+EXPORT_SYMBOL_GPL(mtk_memif_set_rate);
+
+int mtk_memif_set_rate_substream(struct snd_pcm_substream *substream,
+				 int id, unsigned int rate)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct snd_soc_component *component =
+		snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
+	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
+
+	int fs = 0;
+
+	if (!afe->memif_fs) {
+		dev_err(afe->dev, "%s(), error, afe->memif_fs == NULL\n",
+			__func__);
+		return -EINVAL;
+	}
+
+	fs = afe->memif_fs(substream, rate);
+
+	if (fs < 0)
+		return -EINVAL;
+
+	return mtk_memif_set_rate_fs(afe, id, fs);
+}
+EXPORT_SYMBOL_GPL(mtk_memif_set_rate_substream);
+
+int mtk_memif_set_format(struct mtk_base_afe *afe,
+			 int id, snd_pcm_format_t format)
+{
+	struct mtk_base_afe_memif *memif = &afe->memif[id];
+	int hd_audio = 0;
+	int hd_align = 0;
+
+	/* set hd mode */
+	switch (format) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+	case SNDRV_PCM_FORMAT_U16_LE:
+		hd_audio = 0;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+	case SNDRV_PCM_FORMAT_U32_LE:
+		if (afe->memif_32bit_supported) {
+			hd_audio = 2;
+			hd_align = 0;
+		} else {
+			hd_audio = 1;
+			hd_align = 1;
+		}
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+	case SNDRV_PCM_FORMAT_U24_LE:
+		hd_audio = 1;
+		break;
+	default:
+		dev_err(afe->dev, "%s() error: unsupported format %d\n",
+			__func__, format);
+		break;
+	}
+
+	mtk_regmap_update_bits(afe->regmap, memif->data->hd_reg,
+			       0x3, hd_audio, memif->data->hd_shift);
+
+	mtk_regmap_update_bits(afe->regmap, memif->data->hd_align_reg,
+			       0x1, hd_align, memif->data->hd_align_mshift);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_memif_set_format);
+
+int mtk_memif_set_pbuf_size(struct mtk_base_afe *afe,
+			    int id, int pbuf_size)
+{
+	const struct mtk_base_memif_data *memif_data = afe->memif[id].data;
+
+	if (memif_data->pbuf_mask == 0 || memif_data->minlen_mask == 0)
+		return 0;
+
+	mtk_regmap_update_bits(afe->regmap, memif_data->pbuf_reg,
+			       memif_data->pbuf_mask,
+			       pbuf_size, memif_data->pbuf_shift);
+
+	mtk_regmap_update_bits(afe->regmap, memif_data->minlen_reg,
+			       memif_data->minlen_mask,
+			       pbuf_size, memif_data->minlen_shift);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_memif_set_pbuf_size);
+
+MODULE_DESCRIPTION("Mediatek simple fe dai operator");
+MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/mediatek/common/mtk-afe-fe-dai.h b/sound/soc/mediatek/common/mtk-afe-fe-dai.h
new file mode 100644
index 000000000..8cec90671
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-afe-fe-dai.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * mtk-afe-fe-dais.h  --  Mediatek afe fe dai operator definition
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@mediatek.com>
+ */
+
+#ifndef _MTK_AFE_FE_DAI_H_
+#define _MTK_AFE_FE_DAI_H_
+
+struct snd_soc_dai_ops;
+struct mtk_base_afe;
+struct mtk_base_afe_memif;
+
+int mtk_afe_fe_startup(struct snd_pcm_substream *substream,
+		       struct snd_soc_dai *dai);
+void mtk_afe_fe_shutdown(struct snd_pcm_substream *substream,
+			 struct snd_soc_dai *dai);
+int mtk_afe_fe_hw_params(struct snd_pcm_substream *substream,
+			 struct snd_pcm_hw_params *params,
+			 struct snd_soc_dai *dai);
+int mtk_afe_fe_hw_free(struct snd_pcm_substream *substream,
+		       struct snd_soc_dai *dai);
+int mtk_afe_fe_prepare(struct snd_pcm_substream *substream,
+		       struct snd_soc_dai *dai);
+int mtk_afe_fe_trigger(struct snd_pcm_substream *substream, int cmd,
+		       struct snd_soc_dai *dai);
+
+extern const struct snd_soc_dai_ops mtk_afe_fe_ops;
+
+int mtk_dynamic_irq_acquire(struct mtk_base_afe *afe);
+int mtk_dynamic_irq_release(struct mtk_base_afe *afe, int irq_id);
+int mtk_afe_suspend(struct snd_soc_component *component);
+int mtk_afe_resume(struct snd_soc_component *component);
+
+int mtk_memif_set_enable(struct mtk_base_afe *afe, int id);
+int mtk_memif_set_disable(struct mtk_base_afe *afe, int id);
+int mtk_memif_set_addr(struct mtk_base_afe *afe, int id,
+		       unsigned char *dma_area,
+		       dma_addr_t dma_addr,
+		       size_t dma_bytes);
+int mtk_memif_set_channel(struct mtk_base_afe *afe,
+			  int id, unsigned int channel);
+int mtk_memif_set_rate(struct mtk_base_afe *afe,
+		       int id, unsigned int rate);
+int mtk_memif_set_rate_substream(struct snd_pcm_substream *substream,
+				 int id, unsigned int rate);
+int mtk_memif_set_format(struct mtk_base_afe *afe,
+			 int id, snd_pcm_format_t format);
+int mtk_memif_set_pbuf_size(struct mtk_base_afe *afe,
+			    int id, int pbuf_size);
+#endif
diff --git a/sound/soc/mediatek/common/mtk-afe-platform-driver.c b/sound/soc/mediatek/common/mtk-afe-platform-driver.c
new file mode 100644
index 000000000..01501d574
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-afe-platform-driver.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mtk-afe-platform-driver.c  --  Mediatek afe platform driver
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@mediatek.com>
+ */
+
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <sound/soc.h>
+
+#include "mtk-afe-platform-driver.h"
+#include "mtk-base-afe.h"
+
+int mtk_afe_combine_sub_dai(struct mtk_base_afe *afe)
+{
+	struct mtk_base_afe_dai *dai;
+	size_t num_dai_drivers = 0, dai_idx = 0;
+
+	/* calcualte total dai driver size */
+	list_for_each_entry(dai, &afe->sub_dais, list) {
+		num_dai_drivers += dai->num_dai_drivers;
+	}
+
+	dev_info(afe->dev, "%s(), num of dai %zd\n", __func__, num_dai_drivers);
+
+	/* combine sub_dais */
+	afe->num_dai_drivers = num_dai_drivers;
+	afe->dai_drivers = devm_kcalloc(afe->dev,
+					num_dai_drivers,
+					sizeof(struct snd_soc_dai_driver),
+					GFP_KERNEL);
+	if (!afe->dai_drivers)
+		return -ENOMEM;
+
+	list_for_each_entry(dai, &afe->sub_dais, list) {
+		/* dai driver */
+		memcpy(&afe->dai_drivers[dai_idx],
+		       dai->dai_drivers,
+		       dai->num_dai_drivers *
+		       sizeof(struct snd_soc_dai_driver));
+		dai_idx += dai->num_dai_drivers;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_combine_sub_dai);
+
+int mtk_afe_add_sub_dai_control(struct snd_soc_component *component)
+{
+	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
+	struct mtk_base_afe_dai *dai;
+
+	list_for_each_entry(dai, &afe->sub_dais, list) {
+		if (dai->controls)
+			snd_soc_add_component_controls(component,
+						       dai->controls,
+						       dai->num_controls);
+
+		if (dai->dapm_widgets)
+			snd_soc_dapm_new_controls(&component->dapm,
+						  dai->dapm_widgets,
+						  dai->num_dapm_widgets);
+	}
+	/* add routes after all widgets are added */
+	list_for_each_entry(dai, &afe->sub_dais, list) {
+		if (dai->dapm_routes)
+			snd_soc_dapm_add_routes(&component->dapm,
+						dai->dapm_routes,
+						dai->num_dapm_routes);
+	}
+
+	snd_soc_dapm_new_widgets(component->dapm.card);
+
+	return 0;
+
+}
+EXPORT_SYMBOL_GPL(mtk_afe_add_sub_dai_control);
+
+snd_pcm_uframes_t mtk_afe_pcm_pointer(struct snd_soc_component *component,
+				      struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
+	struct mtk_base_afe_memif *memif = &afe->memif[asoc_rtd_to_cpu(rtd, 0)->id];
+	const struct mtk_base_memif_data *memif_data = memif->data;
+	struct regmap *regmap = afe->regmap;
+	struct device *dev = afe->dev;
+	int reg_ofs_base = memif_data->reg_ofs_base;
+	int reg_ofs_cur = memif_data->reg_ofs_cur;
+	unsigned int hw_ptr = 0, hw_base = 0;
+	int ret, pcm_ptr_bytes;
+
+	ret = regmap_read(regmap, reg_ofs_cur, &hw_ptr);
+	if (ret || hw_ptr == 0) {
+		dev_err(dev, "%s hw_ptr err\n", __func__);
+		pcm_ptr_bytes = 0;
+		goto POINTER_RETURN_FRAMES;
+	}
+
+	ret = regmap_read(regmap, reg_ofs_base, &hw_base);
+	if (ret || hw_base == 0) {
+		dev_err(dev, "%s hw_ptr err\n", __func__);
+		pcm_ptr_bytes = 0;
+		goto POINTER_RETURN_FRAMES;
+	}
+
+	pcm_ptr_bytes = hw_ptr - hw_base;
+
+POINTER_RETURN_FRAMES:
+	return bytes_to_frames(substream->runtime, pcm_ptr_bytes);
+}
+EXPORT_SYMBOL_GPL(mtk_afe_pcm_pointer);
+
+int mtk_afe_pcm_new(struct snd_soc_component *component,
+		    struct snd_soc_pcm_runtime *rtd)
+{
+	size_t size;
+	struct snd_pcm *pcm = rtd->pcm;
+	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
+
+	size = afe->mtk_afe_hardware->buffer_bytes_max;
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
+				       afe->dev, size, size);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_pcm_new);
+
+const struct snd_soc_component_driver mtk_afe_pcm_platform = {
+	.name		= AFE_PCM_NAME,
+	.pointer	= mtk_afe_pcm_pointer,
+	.pcm_construct	= mtk_afe_pcm_new,
+};
+EXPORT_SYMBOL_GPL(mtk_afe_pcm_platform);
+
+MODULE_DESCRIPTION("Mediatek simple platform driver");
+MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>");
+MODULE_LICENSE("GPL v2");
+
diff --git a/sound/soc/mediatek/common/mtk-afe-platform-driver.h b/sound/soc/mediatek/common/mtk-afe-platform-driver.h
new file mode 100644
index 000000000..fcc923b88
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-afe-platform-driver.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * mtk-afe-platform-driver.h  --  Mediatek afe platform driver definition
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@mediatek.com>
+ */
+
+#ifndef _MTK_AFE_PLATFORM_DRIVER_H_
+#define _MTK_AFE_PLATFORM_DRIVER_H_
+
+#define AFE_PCM_NAME "mtk-afe-pcm"
+extern const struct snd_soc_component_driver mtk_afe_pcm_platform;
+
+struct mtk_base_afe;
+struct snd_pcm;
+struct snd_soc_component;
+struct snd_soc_pcm_runtime;
+
+snd_pcm_uframes_t mtk_afe_pcm_pointer(struct snd_soc_component *component,
+				      struct snd_pcm_substream *substream);
+int mtk_afe_pcm_new(struct snd_soc_component *component,
+		    struct snd_soc_pcm_runtime *rtd);
+
+int mtk_afe_combine_sub_dai(struct mtk_base_afe *afe);
+int mtk_afe_add_sub_dai_control(struct snd_soc_component *component);
+#endif
+
diff --git a/sound/soc/mediatek/common/mtk-base-afe.h b/sound/soc/mediatek/common/mtk-base-afe.h
new file mode 100644
index 000000000..f51578b6c
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-base-afe.h
@@ -0,0 +1,172 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * mtk-base-afe.h  --  Mediatek base afe structure
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@mediatek.com>
+ */
+
+#ifndef _MTK_BASE_AFE_H_
+#define _MTK_BASE_AFE_H_
+
+#include <linux/soc/mediatek/mtk_sip_svc.h>
+
+#define MTK_STREAM_NUM (SNDRV_PCM_STREAM_LAST + 1)
+#define MTK_SIP_AUDIO_CONTROL MTK_SIP_SMC_CMD(0x517)
+
+/* SMC CALL Operations */
+enum mtk_audio_smc_call_op {
+	MTK_AUDIO_SMC_OP_INIT = 0,
+	MTK_AUDIO_SMC_OP_DRAM_REQUEST,
+	MTK_AUDIO_SMC_OP_DRAM_RELEASE,
+	MTK_AUDIO_SMC_OP_SRAM_REQUEST,
+	MTK_AUDIO_SMC_OP_SRAM_RELEASE,
+	MTK_AUDIO_SMC_OP_ADSP_REQUEST,
+	MTK_AUDIO_SMC_OP_ADSP_RELEASE,
+	MTK_AUDIO_SMC_OP_DOMAIN_SIDEBANDS,
+	MTK_AUDIO_SMC_OP_BTCVSD_WRITE,
+	MTK_AUDIO_SMC_OP_BTCVSD_UPDATE_CTRL_CLEAR,
+	MTK_AUDIO_SMC_OP_BTCVSD_UPDATE_CTRL_UNDERFLOW,
+	MTK_AUDIO_SMC_OP_NUM
+};
+
+struct mtk_base_memif_data {
+	int id;
+	const char *name;
+	int reg_ofs_base;
+	int reg_ofs_cur;
+	int reg_ofs_end;
+	int reg_ofs_base_msb;
+	int reg_ofs_cur_msb;
+	int reg_ofs_end_msb;
+	int fs_reg;
+	int fs_shift;
+	int fs_maskbit;
+	int mono_reg;
+	int mono_shift;
+	int mono_invert;
+	int quad_ch_reg;
+	int quad_ch_mask;
+	int quad_ch_shift;
+	int int_odd_flag_reg;
+	int int_odd_flag_shift;
+	int enable_reg;
+	int enable_shift;
+	int hd_reg;
+	int hd_shift;
+	int hd_align_reg;
+	int hd_align_mshift;
+	int msb_reg;
+	int msb_shift;
+	int msb_end_reg;
+	int msb_end_shift;
+	int agent_disable_reg;
+	int agent_disable_shift;
+	int ch_num_reg;
+	int ch_num_shift;
+	int ch_num_maskbit;
+	/* playback memif only */
+	int pbuf_reg;
+	int pbuf_mask;
+	int pbuf_shift;
+	int minlen_reg;
+	int minlen_mask;
+	int minlen_shift;
+};
+
+struct mtk_base_irq_data {
+	int id;
+	int irq_cnt_reg;
+	int irq_cnt_shift;
+	int irq_cnt_maskbit;
+	int irq_fs_reg;
+	int irq_fs_shift;
+	int irq_fs_maskbit;
+	int irq_en_reg;
+	int irq_en_shift;
+	int irq_clr_reg;
+	int irq_clr_shift;
+	int irq_status_shift;
+};
+
+struct device;
+struct list_head;
+struct mtk_base_afe_memif;
+struct mtk_base_afe_irq;
+struct mtk_base_afe_dai;
+struct regmap;
+struct snd_pcm_substream;
+struct snd_soc_dai;
+
+struct mtk_base_afe {
+	void __iomem *base_addr;
+	struct device *dev;
+	struct regmap *regmap;
+	struct mutex irq_alloc_lock; /* dynamic alloc irq lock */
+
+	unsigned int const *reg_back_up_list;
+	unsigned int *reg_back_up;
+	unsigned int reg_back_up_list_num;
+
+	int (*runtime_suspend)(struct device *dev);
+	int (*runtime_resume)(struct device *dev);
+	bool suspended;
+
+	struct mtk_base_afe_memif *memif;
+	int memif_size;
+	struct mtk_base_afe_irq *irqs;
+	int irqs_size;
+	int memif_32bit_supported;
+
+	struct list_head sub_dais;
+	struct snd_soc_dai_driver *dai_drivers;
+	unsigned int num_dai_drivers;
+
+	const struct snd_pcm_hardware *mtk_afe_hardware;
+	int (*memif_fs)(struct snd_pcm_substream *substream,
+			unsigned int rate);
+	int (*irq_fs)(struct snd_pcm_substream *substream,
+		      unsigned int rate);
+	int (*get_dai_fs)(struct mtk_base_afe *afe,
+			  int dai_id, unsigned int rate);
+	int (*get_memif_pbuf_size)(struct snd_pcm_substream *substream);
+
+	int (*request_dram_resource)(struct device *dev);
+	int (*release_dram_resource)(struct device *dev);
+
+	void *platform_priv;
+};
+
+struct mtk_base_afe_memif {
+	unsigned int phys_buf_addr;
+	int buffer_size;
+	struct snd_pcm_substream *substream;
+	const struct mtk_base_memif_data *data;
+	int irq_usage;
+	int const_irq;
+	unsigned char *dma_area;
+	dma_addr_t dma_addr;
+	size_t dma_bytes;
+};
+
+struct mtk_base_afe_irq {
+	const struct mtk_base_irq_data *irq_data;
+	int irq_occupyed;
+};
+
+struct mtk_base_afe_dai {
+	struct snd_soc_dai_driver *dai_drivers;
+	unsigned int num_dai_drivers;
+
+	const struct snd_kcontrol_new *controls;
+	unsigned int num_controls;
+	const struct snd_soc_dapm_widget *dapm_widgets;
+	unsigned int num_dapm_widgets;
+	const struct snd_soc_dapm_route *dapm_routes;
+	unsigned int num_dapm_routes;
+
+	struct list_head list;
+};
+
+#endif
+
diff --git a/sound/soc/mediatek/common/mtk-btcvsd.c b/sound/soc/mediatek/common/mtk-btcvsd.c
new file mode 100644
index 000000000..c12d170fa
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-btcvsd.c
@@ -0,0 +1,1410 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Mediatek ALSA BT SCO CVSD/MSBC Driver
+//
+// Copyright (c) 2019 MediaTek Inc.
+// Author: KaiChieh Chuang <kaichieh.chuang@mediatek.com>
+
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/sched/clock.h>
+
+#include <sound/soc.h>
+
+#define BTCVSD_SND_NAME "mtk-btcvsd-snd"
+
+#define BT_CVSD_TX_NREADY	BIT(21)
+#define BT_CVSD_RX_READY	BIT(22)
+#define BT_CVSD_TX_UNDERFLOW	BIT(23)
+#define BT_CVSD_RX_OVERFLOW	BIT(24)
+#define BT_CVSD_INTERRUPT	BIT(31)
+
+#define BT_CVSD_CLEAR \
+	(BT_CVSD_TX_NREADY | BT_CVSD_RX_READY | BT_CVSD_TX_UNDERFLOW |\
+	 BT_CVSD_RX_OVERFLOW | BT_CVSD_INTERRUPT)
+
+/* TX */
+#define SCO_TX_ENCODE_SIZE (60)
+/* 18 = 6 * 180 / SCO_TX_ENCODE_SIZE */
+#define SCO_TX_PACKER_BUF_NUM (18)
+
+/* RX */
+#define SCO_RX_PLC_SIZE (30)
+#define SCO_RX_PACKER_BUF_NUM (64)
+#define SCO_RX_PACKET_MASK (0x3F)
+
+#define SCO_CVSD_PACKET_VALID_SIZE 2
+
+#define SCO_PACKET_120 120
+#define SCO_PACKET_180 180
+
+#define BTCVSD_RX_PACKET_SIZE (SCO_RX_PLC_SIZE + SCO_CVSD_PACKET_VALID_SIZE)
+#define BTCVSD_TX_PACKET_SIZE (SCO_TX_ENCODE_SIZE)
+
+#define BTCVSD_RX_BUF_SIZE (BTCVSD_RX_PACKET_SIZE * SCO_RX_PACKER_BUF_NUM)
+#define BTCVSD_TX_BUF_SIZE (BTCVSD_TX_PACKET_SIZE * SCO_TX_PACKER_BUF_NUM)
+
+enum bt_sco_state {
+	BT_SCO_STATE_IDLE,
+	BT_SCO_STATE_RUNNING,
+	BT_SCO_STATE_ENDING,
+	BT_SCO_STATE_LOOPBACK,
+};
+
+enum bt_sco_direct {
+	BT_SCO_DIRECT_BT2ARM,
+	BT_SCO_DIRECT_ARM2BT,
+};
+
+enum bt_sco_packet_len {
+	BT_SCO_CVSD_30 = 0,
+	BT_SCO_CVSD_60,
+	BT_SCO_CVSD_90,
+	BT_SCO_CVSD_120,
+	BT_SCO_CVSD_10,
+	BT_SCO_CVSD_20,
+	BT_SCO_CVSD_MAX,
+};
+
+enum BT_SCO_BAND {
+	BT_SCO_NB,
+	BT_SCO_WB,
+};
+
+struct mtk_btcvsd_snd_hw_info {
+	unsigned int num_valid_addr;
+	unsigned long bt_sram_addr[20];
+	unsigned int packet_length;
+	unsigned int packet_num;
+};
+
+struct mtk_btcvsd_snd_stream {
+	struct snd_pcm_substream *substream;
+	int stream;
+
+	enum bt_sco_state state;
+
+	unsigned int packet_size;
+	unsigned int buf_size;
+	u8 temp_packet_buf[SCO_PACKET_180];
+
+	int packet_w;
+	int packet_r;
+	snd_pcm_uframes_t prev_frame;
+	int prev_packet_idx;
+
+	unsigned int xrun:1;
+	unsigned int timeout:1;
+	unsigned int mute:1;
+	unsigned int trigger_start:1;
+	unsigned int wait_flag:1;
+	unsigned int rw_cnt;
+
+	unsigned long long time_stamp;
+	unsigned long long buf_data_equivalent_time;
+
+	struct mtk_btcvsd_snd_hw_info buffer_info;
+};
+
+struct mtk_btcvsd_snd {
+	struct device *dev;
+	int irq_id;
+
+	struct regmap *infra;
+	void __iomem *bt_pkv_base;
+	void __iomem *bt_sram_bank2_base;
+
+	unsigned int infra_misc_offset;
+	unsigned int conn_bt_cvsd_mask;
+	unsigned int cvsd_mcu_read_offset;
+	unsigned int cvsd_mcu_write_offset;
+	unsigned int cvsd_packet_indicator;
+
+	u32 *bt_reg_pkt_r;
+	u32 *bt_reg_pkt_w;
+	u32 *bt_reg_ctl;
+
+	unsigned int irq_disabled:1;
+
+	spinlock_t tx_lock;	/* spinlock for bt tx stream control */
+	spinlock_t rx_lock;	/* spinlock for bt rx stream control */
+	wait_queue_head_t tx_wait;
+	wait_queue_head_t rx_wait;
+
+	struct mtk_btcvsd_snd_stream *tx;
+	struct mtk_btcvsd_snd_stream *rx;
+	u8 tx_packet_buf[BTCVSD_TX_BUF_SIZE];
+	u8 rx_packet_buf[BTCVSD_RX_BUF_SIZE];
+
+	enum BT_SCO_BAND band;
+};
+
+struct mtk_btcvsd_snd_time_buffer_info {
+	unsigned long long data_count_equi_time;
+	unsigned long long time_stamp_us;
+};
+
+static const unsigned int btsco_packet_valid_mask[BT_SCO_CVSD_MAX][6] = {
+	{0x1, 0x1 << 1, 0x1 << 2, 0x1 << 3, 0x1 << 4, 0x1 << 5},
+	{0x1, 0x1, 0x2, 0x2, 0x4, 0x4},
+	{0x1, 0x1, 0x1, 0x2, 0x2, 0x2},
+	{0x1, 0x1, 0x1, 0x1, 0x0, 0x0},
+	{0x7, 0x7 << 3, 0x7 << 6, 0x7 << 9, 0x7 << 12, 0x7 << 15},
+	{0x3, 0x3 << 1, 0x3 << 3, 0x3 << 4, 0x3 << 6, 0x3 << 7},
+};
+
+static const unsigned int btsco_packet_info[BT_SCO_CVSD_MAX][4] = {
+	{30, 6, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
+	 SCO_PACKET_180 / SCO_RX_PLC_SIZE},
+	{60, 3, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
+	 SCO_PACKET_180 / SCO_RX_PLC_SIZE},
+	{90, 2, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
+	 SCO_PACKET_180 / SCO_RX_PLC_SIZE},
+	{120, 1, SCO_PACKET_120 / SCO_TX_ENCODE_SIZE,
+	 SCO_PACKET_120 / SCO_RX_PLC_SIZE},
+	{10, 18, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
+	 SCO_PACKET_180 / SCO_RX_PLC_SIZE},
+	{20, 9, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
+	 SCO_PACKET_180 / SCO_RX_PLC_SIZE},
+};
+
+static const u8 table_msbc_silence[SCO_PACKET_180] = {
+	0x01, 0x38, 0xad, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, 0x00,
+	0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d,
+	0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7,
+	0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd,
+	0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77,
+	0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6c, 0x00,
+	0x01, 0xc8, 0xad, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, 0x00,
+	0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d,
+	0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7,
+	0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd,
+	0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77,
+	0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6c, 0x00,
+	0x01, 0xf8, 0xad, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, 0x00,
+	0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d,
+	0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7,
+	0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd,
+	0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77,
+	0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6c, 0x00
+};
+
+static void mtk_btcvsd_snd_irq_enable(struct mtk_btcvsd_snd *bt)
+{
+	regmap_update_bits(bt->infra, bt->infra_misc_offset,
+			   bt->conn_bt_cvsd_mask, 0);
+}
+
+static void mtk_btcvsd_snd_irq_disable(struct mtk_btcvsd_snd *bt)
+{
+	regmap_update_bits(bt->infra, bt->infra_misc_offset,
+			   bt->conn_bt_cvsd_mask, bt->conn_bt_cvsd_mask);
+}
+
+static void mtk_btcvsd_snd_set_state(struct mtk_btcvsd_snd *bt,
+				     struct mtk_btcvsd_snd_stream *bt_stream,
+				     int state)
+{
+	dev_dbg(bt->dev, "%s(), stream %d, state %d, tx->state %d, rx->state %d, irq_disabled %d\n",
+		__func__,
+		bt_stream->stream, state,
+		bt->tx->state, bt->rx->state, bt->irq_disabled);
+
+	bt_stream->state = state;
+
+	if (bt->tx->state == BT_SCO_STATE_IDLE &&
+	    bt->rx->state == BT_SCO_STATE_IDLE) {
+		if (!bt->irq_disabled) {
+			disable_irq(bt->irq_id);
+			mtk_btcvsd_snd_irq_disable(bt);
+			bt->irq_disabled = 1;
+		}
+	} else {
+		if (bt->irq_disabled) {
+			enable_irq(bt->irq_id);
+			mtk_btcvsd_snd_irq_enable(bt);
+			bt->irq_disabled = 0;
+		}
+	}
+}
+
+static int mtk_btcvsd_snd_tx_init(struct mtk_btcvsd_snd *bt)
+{
+	memset(bt->tx, 0, sizeof(*bt->tx));
+	memset(bt->tx_packet_buf, 0, sizeof(bt->tx_packet_buf));
+
+	bt->tx->packet_size = BTCVSD_TX_PACKET_SIZE;
+	bt->tx->buf_size = BTCVSD_TX_BUF_SIZE;
+	bt->tx->timeout = 0;
+	bt->tx->rw_cnt = 0;
+	bt->tx->stream = SNDRV_PCM_STREAM_PLAYBACK;
+	return 0;
+}
+
+static int mtk_btcvsd_snd_rx_init(struct mtk_btcvsd_snd *bt)
+{
+	memset(bt->rx, 0, sizeof(*bt->rx));
+	memset(bt->rx_packet_buf, 0, sizeof(bt->rx_packet_buf));
+
+	bt->rx->packet_size = BTCVSD_RX_PACKET_SIZE;
+	bt->rx->buf_size = BTCVSD_RX_BUF_SIZE;
+	bt->rx->timeout = 0;
+	bt->rx->rw_cnt = 0;
+	bt->rx->stream = SNDRV_PCM_STREAM_CAPTURE;
+	return 0;
+}
+
+static void get_tx_time_stamp(struct mtk_btcvsd_snd *bt,
+			      struct mtk_btcvsd_snd_time_buffer_info *ts)
+{
+	ts->time_stamp_us = bt->tx->time_stamp;
+	ts->data_count_equi_time = bt->tx->buf_data_equivalent_time;
+}
+
+static void get_rx_time_stamp(struct mtk_btcvsd_snd *bt,
+			      struct mtk_btcvsd_snd_time_buffer_info *ts)
+{
+	ts->time_stamp_us = bt->rx->time_stamp;
+	ts->data_count_equi_time = bt->rx->buf_data_equivalent_time;
+}
+
+static int btcvsd_bytes_to_frame(struct snd_pcm_substream *substream,
+				 int bytes)
+{
+	int count = bytes;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	if (runtime->format == SNDRV_PCM_FORMAT_S32_LE ||
+	    runtime->format == SNDRV_PCM_FORMAT_U32_LE)
+		count = count >> 2;
+	else
+		count = count >> 1;
+
+	count = count / runtime->channels;
+	return count;
+}
+
+static void mtk_btcvsd_snd_data_transfer(enum bt_sco_direct dir,
+					 u8 *src, u8 *dst,
+					 unsigned int blk_size,
+					 unsigned int blk_num)
+{
+	unsigned int i, j;
+
+	if (blk_size == 60 || blk_size == 120 || blk_size == 20) {
+		u32 *src_32 = (u32 *)src;
+		u32 *dst_32 = (u32 *)dst;
+
+		for (i = 0; i < (blk_size * blk_num / 4); i++)
+			*dst_32++ = *src_32++;
+	} else {
+		u16 *src_16 = (u16 *)src;
+		u16 *dst_16 = (u16 *)dst;
+
+		for (j = 0; j < blk_num; j++) {
+			for (i = 0; i < (blk_size / 2); i++)
+				*dst_16++ = *src_16++;
+
+			if (dir == BT_SCO_DIRECT_BT2ARM)
+				src_16++;
+			else
+				dst_16++;
+		}
+	}
+}
+
+/* write encoded mute data to bt sram */
+static int btcvsd_tx_clean_buffer(struct mtk_btcvsd_snd *bt)
+{
+	unsigned int i;
+	unsigned int num_valid_addr;
+	unsigned long flags;
+	enum BT_SCO_BAND band = bt->band;
+
+	/* prepare encoded mute data */
+	if (band == BT_SCO_NB)
+		memset(bt->tx->temp_packet_buf, 170, SCO_PACKET_180);
+	else
+		memcpy(bt->tx->temp_packet_buf,
+		       table_msbc_silence, SCO_PACKET_180);
+
+	/* write mute data to bt tx sram buffer */
+	spin_lock_irqsave(&bt->tx_lock, flags);
+	num_valid_addr = bt->tx->buffer_info.num_valid_addr;
+
+	dev_info(bt->dev, "%s(), band %d, num_valid_addr %u\n",
+		 __func__, band, num_valid_addr);
+
+	for (i = 0; i < num_valid_addr; i++) {
+		void *dst;
+
+		dev_info(bt->dev, "%s(), clean addr 0x%lx\n", __func__,
+			 bt->tx->buffer_info.bt_sram_addr[i]);
+
+		dst = (void *)bt->tx->buffer_info.bt_sram_addr[i];
+
+		mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_ARM2BT,
+					     bt->tx->temp_packet_buf, dst,
+					     bt->tx->buffer_info.packet_length,
+					     bt->tx->buffer_info.packet_num);
+	}
+	spin_unlock_irqrestore(&bt->tx_lock, flags);
+
+	return 0;
+}
+
+static int mtk_btcvsd_read_from_bt(struct mtk_btcvsd_snd *bt,
+				   enum bt_sco_packet_len packet_type,
+				   unsigned int packet_length,
+				   unsigned int packet_num,
+				   unsigned int blk_size,
+				   unsigned int control)
+{
+	unsigned int i;
+	int pv;
+	u8 *src;
+	unsigned int packet_buf_ofs;
+	unsigned long flags;
+	unsigned long connsys_addr_rx, ap_addr_rx;
+
+	connsys_addr_rx = *bt->bt_reg_pkt_r;
+	ap_addr_rx = (unsigned long)bt->bt_sram_bank2_base +
+		     (connsys_addr_rx & 0xFFFF);
+
+	if (connsys_addr_rx == 0xdeadfeed) {
+		/* bt return 0xdeadfeed if read register during bt sleep */
+		dev_warn(bt->dev, "%s(), connsys_addr_rx == 0xdeadfeed",
+			 __func__);
+		return -EIO;
+	}
+
+	src = (u8 *)ap_addr_rx;
+
+	mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_BT2ARM, src,
+				     bt->rx->temp_packet_buf, packet_length,
+				     packet_num);
+
+	spin_lock_irqsave(&bt->rx_lock, flags);
+	for (i = 0; i < blk_size; i++) {
+		packet_buf_ofs = (bt->rx->packet_w & SCO_RX_PACKET_MASK) *
+				 bt->rx->packet_size;
+		memcpy(bt->rx_packet_buf + packet_buf_ofs,
+		       bt->rx->temp_packet_buf + (SCO_RX_PLC_SIZE * i),
+		       SCO_RX_PLC_SIZE);
+		if ((control & btsco_packet_valid_mask[packet_type][i]) ==
+		    btsco_packet_valid_mask[packet_type][i])
+			pv = 1;
+		else
+			pv = 0;
+
+		packet_buf_ofs += SCO_RX_PLC_SIZE;
+		memcpy(bt->rx_packet_buf + packet_buf_ofs, (void *)&pv,
+		       SCO_CVSD_PACKET_VALID_SIZE);
+		bt->rx->packet_w++;
+	}
+	spin_unlock_irqrestore(&bt->rx_lock, flags);
+	return 0;
+}
+
+static int mtk_btcvsd_write_to_bt(struct mtk_btcvsd_snd *bt,
+				  enum bt_sco_packet_len packet_type,
+				  unsigned int packet_length,
+				  unsigned int packet_num,
+				  unsigned int blk_size)
+{
+	unsigned int i;
+	unsigned long flags;
+	u8 *dst;
+	unsigned long connsys_addr_tx, ap_addr_tx;
+	bool new_ap_addr_tx = true;
+
+	connsys_addr_tx = *bt->bt_reg_pkt_w;
+	ap_addr_tx = (unsigned long)bt->bt_sram_bank2_base +
+		     (connsys_addr_tx & 0xFFFF);
+
+	if (connsys_addr_tx == 0xdeadfeed) {
+		/* bt return 0xdeadfeed if read register during bt sleep */
+		dev_warn(bt->dev, "%s(), connsys_addr_tx == 0xdeadfeed\n",
+			 __func__);
+		return -EIO;
+	}
+
+	spin_lock_irqsave(&bt->tx_lock, flags);
+	for (i = 0; i < blk_size; i++) {
+		memcpy(bt->tx->temp_packet_buf + (bt->tx->packet_size * i),
+		       (bt->tx_packet_buf +
+			(bt->tx->packet_r % SCO_TX_PACKER_BUF_NUM) *
+			bt->tx->packet_size),
+		       bt->tx->packet_size);
+
+		bt->tx->packet_r++;
+	}
+	spin_unlock_irqrestore(&bt->tx_lock, flags);
+
+	dst = (u8 *)ap_addr_tx;
+
+	if (!bt->tx->mute) {
+		mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_ARM2BT,
+					     bt->tx->temp_packet_buf, dst,
+					     packet_length, packet_num);
+	}
+
+	/* store bt tx buffer sram info */
+	bt->tx->buffer_info.packet_length = packet_length;
+	bt->tx->buffer_info.packet_num = packet_num;
+	for (i = 0; i < bt->tx->buffer_info.num_valid_addr; i++) {
+		if (bt->tx->buffer_info.bt_sram_addr[i] == ap_addr_tx) {
+			new_ap_addr_tx = false;
+			break;
+		}
+	}
+	if (new_ap_addr_tx) {
+		unsigned int next_idx;
+
+		spin_lock_irqsave(&bt->tx_lock, flags);
+		bt->tx->buffer_info.num_valid_addr++;
+		next_idx = bt->tx->buffer_info.num_valid_addr - 1;
+		bt->tx->buffer_info.bt_sram_addr[next_idx] = ap_addr_tx;
+		spin_unlock_irqrestore(&bt->tx_lock, flags);
+		dev_info(bt->dev, "%s(), new ap_addr_tx = 0x%lx, num_valid_addr %d\n",
+			 __func__, ap_addr_tx,
+			 bt->tx->buffer_info.num_valid_addr);
+	}
+
+	if (bt->tx->mute)
+		btcvsd_tx_clean_buffer(bt);
+
+	return 0;
+}
+
+static irqreturn_t mtk_btcvsd_snd_irq_handler(int irq_id, void *dev)
+{
+	struct mtk_btcvsd_snd *bt = dev;
+	unsigned int packet_type, packet_num, packet_length;
+	unsigned int buf_cnt_tx, buf_cnt_rx, control;
+
+	if (bt->rx->state != BT_SCO_STATE_RUNNING &&
+	    bt->rx->state != BT_SCO_STATE_ENDING &&
+	    bt->tx->state != BT_SCO_STATE_RUNNING &&
+	    bt->tx->state != BT_SCO_STATE_ENDING &&
+	    bt->tx->state != BT_SCO_STATE_LOOPBACK) {
+		dev_warn(bt->dev, "%s(), in idle state: rx->state: %d, tx->state: %d\n",
+			 __func__, bt->rx->state, bt->tx->state);
+		goto irq_handler_exit;
+	}
+
+	control = *bt->bt_reg_ctl;
+	packet_type = (control >> 18) & 0x7;
+
+	if (((control >> 31) & 1) == 0) {
+		dev_warn(bt->dev, "%s(), ((control >> 31) & 1) == 0, control 0x%x\n",
+			 __func__, control);
+		goto irq_handler_exit;
+	}
+
+	if (packet_type >= BT_SCO_CVSD_MAX) {
+		dev_warn(bt->dev, "%s(), invalid packet_type %u, exit\n",
+			 __func__, packet_type);
+		goto irq_handler_exit;
+	}
+
+	packet_length = btsco_packet_info[packet_type][0];
+	packet_num = btsco_packet_info[packet_type][1];
+	buf_cnt_tx = btsco_packet_info[packet_type][2];
+	buf_cnt_rx = btsco_packet_info[packet_type][3];
+
+	if (bt->tx->state == BT_SCO_STATE_LOOPBACK) {
+		u8 *src, *dst;
+		unsigned long connsys_addr_rx, ap_addr_rx;
+		unsigned long connsys_addr_tx, ap_addr_tx;
+
+		connsys_addr_rx = *bt->bt_reg_pkt_r;
+		ap_addr_rx = (unsigned long)bt->bt_sram_bank2_base +
+			     (connsys_addr_rx & 0xFFFF);
+
+		connsys_addr_tx = *bt->bt_reg_pkt_w;
+		ap_addr_tx = (unsigned long)bt->bt_sram_bank2_base +
+			     (connsys_addr_tx & 0xFFFF);
+
+		if (connsys_addr_tx == 0xdeadfeed ||
+		    connsys_addr_rx == 0xdeadfeed) {
+			/* bt return 0xdeadfeed if read reg during bt sleep */
+			dev_warn(bt->dev, "%s(), connsys_addr_tx == 0xdeadfeed\n",
+				 __func__);
+			goto irq_handler_exit;
+		}
+
+		src = (u8 *)ap_addr_rx;
+		dst = (u8 *)ap_addr_tx;
+
+		mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_BT2ARM, src,
+					     bt->tx->temp_packet_buf,
+					     packet_length,
+					     packet_num);
+		mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_ARM2BT,
+					     bt->tx->temp_packet_buf, dst,
+					     packet_length,
+					     packet_num);
+		bt->rx->rw_cnt++;
+		bt->tx->rw_cnt++;
+	}
+
+	if (bt->rx->state == BT_SCO_STATE_RUNNING ||
+	    bt->rx->state == BT_SCO_STATE_ENDING) {
+		if (bt->rx->xrun) {
+			if (bt->rx->packet_w - bt->rx->packet_r <=
+			    SCO_RX_PACKER_BUF_NUM - 2 * buf_cnt_rx) {
+				/*
+				 * free space is larger then
+				 * twice interrupt rx data size
+				 */
+				bt->rx->xrun = 0;
+				dev_warn(bt->dev, "%s(), rx->xrun 0!\n",
+					 __func__);
+			}
+		}
+
+		if (!bt->rx->xrun &&
+		    (bt->rx->packet_w - bt->rx->packet_r <=
+		     SCO_RX_PACKER_BUF_NUM - buf_cnt_rx)) {
+			mtk_btcvsd_read_from_bt(bt,
+						packet_type,
+						packet_length,
+						packet_num,
+						buf_cnt_rx,
+						control);
+			bt->rx->rw_cnt++;
+		} else {
+			bt->rx->xrun = 1;
+			dev_warn(bt->dev, "%s(), rx->xrun 1\n", __func__);
+		}
+	}
+
+	/* tx */
+	bt->tx->timeout = 0;
+	if ((bt->tx->state == BT_SCO_STATE_RUNNING ||
+	     bt->tx->state == BT_SCO_STATE_ENDING) &&
+	    bt->tx->trigger_start) {
+		if (bt->tx->xrun) {
+			/* prepared data is larger then twice
+			 * interrupt tx data size
+			 */
+			if (bt->tx->packet_w - bt->tx->packet_r >=
+			    2 * buf_cnt_tx) {
+				bt->tx->xrun = 0;
+				dev_warn(bt->dev, "%s(), tx->xrun 0\n",
+					 __func__);
+			}
+		}
+
+		if ((!bt->tx->xrun &&
+		     (bt->tx->packet_w - bt->tx->packet_r >= buf_cnt_tx)) ||
+		    bt->tx->state == BT_SCO_STATE_ENDING) {
+			mtk_btcvsd_write_to_bt(bt,
+					       packet_type,
+					       packet_length,
+					       packet_num,
+					       buf_cnt_tx);
+			bt->tx->rw_cnt++;
+		} else {
+			bt->tx->xrun = 1;
+			dev_warn(bt->dev, "%s(), tx->xrun 1\n", __func__);
+		}
+	}
+
+	*bt->bt_reg_ctl &= ~BT_CVSD_CLEAR;
+
+	if (bt->rx->state == BT_SCO_STATE_RUNNING ||
+	    bt->rx->state == BT_SCO_STATE_ENDING) {
+		bt->rx->wait_flag = 1;
+		wake_up_interruptible(&bt->rx_wait);
+		snd_pcm_period_elapsed(bt->rx->substream);
+	}
+	if (bt->tx->state == BT_SCO_STATE_RUNNING ||
+	    bt->tx->state == BT_SCO_STATE_ENDING) {
+		bt->tx->wait_flag = 1;
+		wake_up_interruptible(&bt->tx_wait);
+		snd_pcm_period_elapsed(bt->tx->substream);
+	}
+
+	return IRQ_HANDLED;
+irq_handler_exit:
+	*bt->bt_reg_ctl &= ~BT_CVSD_CLEAR;
+	return IRQ_HANDLED;
+}
+
+static int wait_for_bt_irq(struct mtk_btcvsd_snd *bt,
+			   struct mtk_btcvsd_snd_stream *bt_stream)
+{
+	unsigned long long t1, t2;
+	/* one interrupt period = 22.5ms */
+	unsigned long long timeout_limit = 22500000;
+	int max_timeout_trial = 2;
+	int ret;
+
+	bt_stream->wait_flag = 0;
+
+	while (max_timeout_trial && !bt_stream->wait_flag) {
+		t1 = sched_clock();
+		if (bt_stream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			ret = wait_event_interruptible_timeout(bt->tx_wait,
+				bt_stream->wait_flag,
+				nsecs_to_jiffies(timeout_limit));
+		} else {
+			ret = wait_event_interruptible_timeout(bt->rx_wait,
+				bt_stream->wait_flag,
+				nsecs_to_jiffies(timeout_limit));
+		}
+
+		t2 = sched_clock();
+		t2 = t2 - t1; /* in ns (10^9) */
+
+		if (t2 > timeout_limit) {
+			dev_warn(bt->dev, "%s(), stream %d, timeout %llu, limit %llu, ret %d, flag %d\n",
+				 __func__, bt_stream->stream,
+				 t2, timeout_limit, ret,
+				 bt_stream->wait_flag);
+		}
+
+		if (ret < 0) {
+			/*
+			 * error, -ERESTARTSYS if it was interrupted by
+			 * a signal
+			 */
+			dev_warn(bt->dev, "%s(), stream %d, error, trial left %d\n",
+				 __func__,
+				 bt_stream->stream, max_timeout_trial);
+
+			bt_stream->timeout = 1;
+			return ret;
+		} else if (ret == 0) {
+			/* conidtion is false after timeout */
+			max_timeout_trial--;
+			dev_warn(bt->dev, "%s(), stream %d, error, timeout, condition is false, trial left %d\n",
+				 __func__,
+				 bt_stream->stream, max_timeout_trial);
+
+			if (max_timeout_trial <= 0) {
+				bt_stream->timeout = 1;
+				return -ETIME;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt,
+				   struct iov_iter *buf,
+				   size_t count)
+{
+	ssize_t read_size = 0, read_count = 0, cur_read_idx, cont;
+	unsigned long avail;
+	unsigned long flags;
+	unsigned int packet_size = bt->rx->packet_size;
+
+	while (count) {
+		spin_lock_irqsave(&bt->rx_lock, flags);
+		/* available data in RX packet buffer */
+		avail = (bt->rx->packet_w - bt->rx->packet_r) * packet_size;
+
+		cur_read_idx = (bt->rx->packet_r & SCO_RX_PACKET_MASK) *
+			       packet_size;
+		spin_unlock_irqrestore(&bt->rx_lock, flags);
+
+		if (!avail) {
+			int ret = wait_for_bt_irq(bt, bt->rx);
+
+			if (ret)
+				return read_count;
+
+			continue;
+		}
+
+		/* count must be multiple of packet_size */
+		if (count % packet_size != 0 ||
+		    avail % packet_size != 0) {
+			dev_warn(bt->dev, "%s(), count %zu or d %lu is not multiple of packet_size %dd\n",
+				 __func__, count, avail, packet_size);
+
+			count -= count % packet_size;
+			avail -= avail % packet_size;
+		}
+
+		if (count > avail)
+			read_size = avail;
+		else
+			read_size = count;
+
+		/* calculate continue space */
+		cont = bt->rx->buf_size - cur_read_idx;
+		if (read_size > cont)
+			read_size = cont;
+
+		if (copy_to_iter(bt->rx_packet_buf + cur_read_idx,
+				 read_size, buf) != read_size) {
+			dev_warn(bt->dev, "%s(), copy_to_iter fail\n",
+				 __func__);
+			return -EFAULT;
+		}
+
+		spin_lock_irqsave(&bt->rx_lock, flags);
+		bt->rx->packet_r += read_size / packet_size;
+		spin_unlock_irqrestore(&bt->rx_lock, flags);
+
+		read_count += read_size;
+		count -= read_size;
+	}
+
+	/*
+	 * save current timestamp & buffer time in times_tamp and
+	 * buf_data_equivalent_time
+	 */
+	bt->rx->time_stamp = sched_clock();
+	bt->rx->buf_data_equivalent_time =
+		(unsigned long long)(bt->rx->packet_w - bt->rx->packet_r) *
+		SCO_RX_PLC_SIZE * 16 * 1000 / 2 / 64;
+	bt->rx->buf_data_equivalent_time += read_count * SCO_RX_PLC_SIZE *
+					    16 * 1000 / packet_size / 2 / 64;
+	/* return equivalent time(us) to data count */
+	bt->rx->buf_data_equivalent_time *= 1000;
+
+	return read_count;
+}
+
+static ssize_t mtk_btcvsd_snd_write(struct mtk_btcvsd_snd *bt,
+				    struct iov_iter *buf,
+				    size_t count)
+{
+	int written_size = count, avail, cur_write_idx, write_size, cont;
+	unsigned long flags;
+	unsigned int packet_size = bt->tx->packet_size;
+
+	/*
+	 * save current timestamp & buffer time in time_stamp and
+	 * buf_data_equivalent_time
+	 */
+	bt->tx->time_stamp = sched_clock();
+	bt->tx->buf_data_equivalent_time =
+		(unsigned long long)(bt->tx->packet_w - bt->tx->packet_r) *
+		packet_size * 16 * 1000 / 2 / 64;
+
+	/* return equivalent time(us) to data count */
+	bt->tx->buf_data_equivalent_time *= 1000;
+
+	while (count) {
+		spin_lock_irqsave(&bt->tx_lock, flags);
+		/* free space of TX packet buffer */
+		avail = bt->tx->buf_size -
+			(bt->tx->packet_w - bt->tx->packet_r) * packet_size;
+
+		cur_write_idx = (bt->tx->packet_w % SCO_TX_PACKER_BUF_NUM) *
+				packet_size;
+		spin_unlock_irqrestore(&bt->tx_lock, flags);
+
+		if (!avail) {
+			int ret = wait_for_bt_irq(bt, bt->tx);
+
+			if (ret)
+				return written_size;
+
+			continue;
+		}
+
+		/* count must be multiple of bt->tx->packet_size */
+		if (count % packet_size != 0 ||
+		    avail % packet_size != 0) {
+			dev_warn(bt->dev, "%s(), count %zu or avail %d is not multiple of packet_size %d\n",
+				 __func__, count, avail, packet_size);
+			count -= count % packet_size;
+			avail -= avail % packet_size;
+		}
+
+		if (count > avail)
+			write_size = avail;
+		else
+			write_size = count;
+
+		/* calculate continue space */
+		cont = bt->tx->buf_size - cur_write_idx;
+		if (write_size > cont)
+			write_size = cont;
+
+		if (copy_from_iter(bt->tx_packet_buf + cur_write_idx,
+				   write_size, buf) != write_size) {
+			dev_warn(bt->dev, "%s(), copy_from_iter fail\n",
+				 __func__);
+			return -EFAULT;
+		}
+
+		spin_lock_irqsave(&bt->tx_lock, flags);
+		bt->tx->packet_w += write_size / packet_size;
+		spin_unlock_irqrestore(&bt->tx_lock, flags);
+		count -= write_size;
+	}
+
+	return written_size;
+}
+
+static struct mtk_btcvsd_snd_stream *get_bt_stream
+	(struct mtk_btcvsd_snd *bt, struct snd_pcm_substream *substream)
+{
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		return bt->tx;
+	else
+		return bt->rx;
+}
+
+/* pcm ops */
+static const struct snd_pcm_hardware mtk_btcvsd_hardware = {
+	.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+		 SNDRV_PCM_INFO_RESUME),
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.buffer_bytes_max = 24 * 1024,
+	.period_bytes_max = 24 * 1024,
+	.periods_min = 2,
+	.periods_max = 16,
+	.fifo_size = 0,
+};
+
+static int mtk_pcm_btcvsd_open(struct snd_soc_component *component,
+			       struct snd_pcm_substream *substream)
+{
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	dev_dbg(bt->dev, "%s(), stream %d, substream %p\n",
+		__func__, substream->stream, substream);
+
+	snd_soc_set_runtime_hwparams(substream, &mtk_btcvsd_hardware);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		ret = mtk_btcvsd_snd_tx_init(bt);
+		bt->tx->substream = substream;
+	} else {
+		ret = mtk_btcvsd_snd_rx_init(bt);
+		bt->rx->substream = substream;
+	}
+
+	return ret;
+}
+
+static int mtk_pcm_btcvsd_close(struct snd_soc_component *component,
+				struct snd_pcm_substream *substream)
+{
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
+	struct mtk_btcvsd_snd_stream *bt_stream = get_bt_stream(bt, substream);
+
+	dev_dbg(bt->dev, "%s(), stream %d\n", __func__, substream->stream);
+
+	mtk_btcvsd_snd_set_state(bt, bt_stream, BT_SCO_STATE_IDLE);
+	bt_stream->substream = NULL;
+	return 0;
+}
+
+static int mtk_pcm_btcvsd_hw_params(struct snd_soc_component *component,
+				    struct snd_pcm_substream *substream,
+				    struct snd_pcm_hw_params *hw_params)
+{
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
+	    params_buffer_bytes(hw_params) % bt->tx->packet_size != 0) {
+		dev_warn(bt->dev, "%s(), error, buffer size %d not valid\n",
+			 __func__,
+			 params_buffer_bytes(hw_params));
+		return -EINVAL;
+	}
+
+	substream->runtime->dma_bytes = params_buffer_bytes(hw_params);
+	return 0;
+}
+
+static int mtk_pcm_btcvsd_hw_free(struct snd_soc_component *component,
+				  struct snd_pcm_substream *substream)
+{
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		btcvsd_tx_clean_buffer(bt);
+
+	return 0;
+}
+
+static int mtk_pcm_btcvsd_prepare(struct snd_soc_component *component,
+				  struct snd_pcm_substream *substream)
+{
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
+	struct mtk_btcvsd_snd_stream *bt_stream = get_bt_stream(bt, substream);
+
+	dev_dbg(bt->dev, "%s(), stream %d\n", __func__, substream->stream);
+
+	mtk_btcvsd_snd_set_state(bt, bt_stream, BT_SCO_STATE_RUNNING);
+	return 0;
+}
+
+static int mtk_pcm_btcvsd_trigger(struct snd_soc_component *component,
+				  struct snd_pcm_substream *substream, int cmd)
+{
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
+	struct mtk_btcvsd_snd_stream *bt_stream = get_bt_stream(bt, substream);
+	int stream = substream->stream;
+	int hw_packet_ptr;
+
+	dev_dbg(bt->dev, "%s(), stream %d, cmd %d\n",
+		__func__, substream->stream, cmd);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		hw_packet_ptr = stream == SNDRV_PCM_STREAM_PLAYBACK ?
+				bt_stream->packet_r : bt_stream->packet_w;
+		bt_stream->prev_packet_idx = hw_packet_ptr;
+		bt_stream->prev_frame = 0;
+		bt_stream->trigger_start = 1;
+		return 0;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		bt_stream->trigger_start = 0;
+		mtk_btcvsd_snd_set_state(bt, bt_stream, BT_SCO_STATE_ENDING);
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static snd_pcm_uframes_t mtk_pcm_btcvsd_pointer(
+	struct snd_soc_component *component,
+	struct snd_pcm_substream *substream)
+{
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
+	struct mtk_btcvsd_snd_stream *bt_stream;
+	snd_pcm_uframes_t frame = 0;
+	int byte = 0;
+	int hw_packet_ptr;
+	int packet_diff;
+	spinlock_t *lock;	/* spinlock for bt stream control */
+	unsigned long flags;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		lock = &bt->tx_lock;
+		bt_stream = bt->tx;
+	} else {
+		lock = &bt->rx_lock;
+		bt_stream = bt->rx;
+	}
+
+	spin_lock_irqsave(lock, flags);
+	hw_packet_ptr = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
+			bt->tx->packet_r : bt->rx->packet_w;
+
+	/* get packet diff from last time */
+	if (hw_packet_ptr >= bt_stream->prev_packet_idx) {
+		packet_diff = hw_packet_ptr - bt_stream->prev_packet_idx;
+	} else {
+		/* integer overflow */
+		packet_diff = (INT_MAX - bt_stream->prev_packet_idx) +
+			      (hw_packet_ptr - INT_MIN) + 1;
+	}
+	bt_stream->prev_packet_idx = hw_packet_ptr;
+
+	/* increased bytes */
+	byte = packet_diff * bt_stream->packet_size;
+
+	frame = btcvsd_bytes_to_frame(substream, byte);
+	frame += bt_stream->prev_frame;
+	frame %= substream->runtime->buffer_size;
+
+	bt_stream->prev_frame = frame;
+
+	spin_unlock_irqrestore(lock, flags);
+
+	return frame;
+}
+
+static int mtk_pcm_btcvsd_copy(struct snd_soc_component *component,
+			       struct snd_pcm_substream *substream,
+			       int channel, unsigned long pos,
+			       struct iov_iter *buf, unsigned long count)
+{
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		return mtk_btcvsd_snd_write(bt, buf, count);
+	else
+		return mtk_btcvsd_snd_read(bt, buf, count);
+}
+
+/* kcontrol */
+static const char *const btsco_band_str[] = {"NB", "WB"};
+
+static const struct soc_enum btcvsd_enum[] = {
+	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(btsco_band_str), btsco_band_str),
+};
+
+static int btcvsd_band_get(struct snd_kcontrol *kcontrol,
+			   struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+
+	ucontrol->value.integer.value[0] = bt->band;
+	return 0;
+}
+
+static int btcvsd_band_set(struct snd_kcontrol *kcontrol,
+			   struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+
+	if (ucontrol->value.enumerated.item[0] >= e->items)
+		return -EINVAL;
+
+	bt->band = ucontrol->value.integer.value[0];
+	dev_dbg(bt->dev, "%s(), band %d\n", __func__, bt->band);
+	return 0;
+}
+
+static int btcvsd_loopback_get(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+	bool lpbk_en = bt->tx->state == BT_SCO_STATE_LOOPBACK;
+
+	ucontrol->value.integer.value[0] = lpbk_en;
+	return 0;
+}
+
+static int btcvsd_loopback_set(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+
+	if (ucontrol->value.integer.value[0]) {
+		mtk_btcvsd_snd_set_state(bt, bt->tx, BT_SCO_STATE_LOOPBACK);
+		mtk_btcvsd_snd_set_state(bt, bt->rx, BT_SCO_STATE_LOOPBACK);
+	} else {
+		mtk_btcvsd_snd_set_state(bt, bt->tx, BT_SCO_STATE_RUNNING);
+		mtk_btcvsd_snd_set_state(bt, bt->rx, BT_SCO_STATE_RUNNING);
+	}
+	return 0;
+}
+
+static int btcvsd_tx_mute_get(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+
+	if (!bt->tx) {
+		ucontrol->value.integer.value[0] = 0;
+		return 0;
+	}
+
+	ucontrol->value.integer.value[0] = bt->tx->mute;
+	return 0;
+}
+
+static int btcvsd_tx_mute_set(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+
+	if (!bt->tx)
+		return 0;
+
+	bt->tx->mute = ucontrol->value.integer.value[0];
+	return 0;
+}
+
+static int btcvsd_rx_irq_received_get(struct snd_kcontrol *kcontrol,
+				      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+
+	if (!bt->rx)
+		return 0;
+
+	ucontrol->value.integer.value[0] = bt->rx->rw_cnt ? 1 : 0;
+	return 0;
+}
+
+static int btcvsd_rx_timeout_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+
+	if (!bt->rx)
+		return 0;
+
+	ucontrol->value.integer.value[0] = bt->rx->timeout;
+	bt->rx->timeout = 0;
+	return 0;
+}
+
+static int btcvsd_rx_timestamp_get(struct snd_kcontrol *kcontrol,
+				   unsigned int __user *data, unsigned int size)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+	int ret = 0;
+	struct mtk_btcvsd_snd_time_buffer_info time_buffer_info_rx;
+
+	if (size > sizeof(struct mtk_btcvsd_snd_time_buffer_info))
+		return -EINVAL;
+
+	get_rx_time_stamp(bt, &time_buffer_info_rx);
+
+	dev_dbg(bt->dev, "%s(), time_stamp_us %llu, data_count_equi_time %llu",
+		__func__,
+		time_buffer_info_rx.time_stamp_us,
+		time_buffer_info_rx.data_count_equi_time);
+
+	if (copy_to_user(data, &time_buffer_info_rx,
+			 sizeof(struct mtk_btcvsd_snd_time_buffer_info))) {
+		dev_warn(bt->dev, "%s(), copy_to_user fail", __func__);
+		ret = -EFAULT;
+	}
+
+	return ret;
+}
+
+static int btcvsd_tx_irq_received_get(struct snd_kcontrol *kcontrol,
+				      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+
+	if (!bt->tx)
+		return 0;
+
+	ucontrol->value.integer.value[0] = bt->tx->rw_cnt ? 1 : 0;
+	return 0;
+}
+
+static int btcvsd_tx_timeout_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+
+	ucontrol->value.integer.value[0] = bt->tx->timeout;
+	return 0;
+}
+
+static int btcvsd_tx_timestamp_get(struct snd_kcontrol *kcontrol,
+				   unsigned int __user *data, unsigned int size)
+{
+	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
+	struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
+	int ret = 0;
+	struct mtk_btcvsd_snd_time_buffer_info time_buffer_info_tx;
+
+	if (size > sizeof(struct mtk_btcvsd_snd_time_buffer_info))
+		return -EINVAL;
+
+	get_tx_time_stamp(bt, &time_buffer_info_tx);
+
+	dev_dbg(bt->dev, "%s(), time_stamp_us %llu, data_count_equi_time %llu",
+		__func__,
+		time_buffer_info_tx.time_stamp_us,
+		time_buffer_info_tx.data_count_equi_time);
+
+	if (copy_to_user(data, &time_buffer_info_tx,
+			 sizeof(struct mtk_btcvsd_snd_time_buffer_info))) {
+		dev_warn(bt->dev, "%s(), copy_to_user fail", __func__);
+		ret = -EFAULT;
+	}
+
+	return ret;
+}
+
+static const struct snd_kcontrol_new mtk_btcvsd_snd_controls[] = {
+	SOC_ENUM_EXT("BTCVSD Band", btcvsd_enum[0],
+		     btcvsd_band_get, btcvsd_band_set),
+	SOC_SINGLE_BOOL_EXT("BTCVSD Loopback Switch", 0,
+			    btcvsd_loopback_get, btcvsd_loopback_set),
+	SOC_SINGLE_BOOL_EXT("BTCVSD Tx Mute Switch", 0,
+			    btcvsd_tx_mute_get, btcvsd_tx_mute_set),
+	SOC_SINGLE_BOOL_EXT("BTCVSD Tx Irq Received Switch", 0,
+			    btcvsd_tx_irq_received_get, NULL),
+	SOC_SINGLE_BOOL_EXT("BTCVSD Tx Timeout Switch", 0,
+			    btcvsd_tx_timeout_get, NULL),
+	SOC_SINGLE_BOOL_EXT("BTCVSD Rx Irq Received Switch", 0,
+			    btcvsd_rx_irq_received_get, NULL),
+	SOC_SINGLE_BOOL_EXT("BTCVSD Rx Timeout Switch", 0,
+			    btcvsd_rx_timeout_get, NULL),
+	SND_SOC_BYTES_TLV("BTCVSD Rx Timestamp",
+			  sizeof(struct mtk_btcvsd_snd_time_buffer_info),
+			  btcvsd_rx_timestamp_get, NULL),
+	SND_SOC_BYTES_TLV("BTCVSD Tx Timestamp",
+			  sizeof(struct mtk_btcvsd_snd_time_buffer_info),
+			  btcvsd_tx_timestamp_get, NULL),
+};
+
+static int mtk_btcvsd_snd_component_probe(struct snd_soc_component *component)
+{
+	return snd_soc_add_component_controls(component,
+		mtk_btcvsd_snd_controls,
+		ARRAY_SIZE(mtk_btcvsd_snd_controls));
+}
+
+static const struct snd_soc_component_driver mtk_btcvsd_snd_platform = {
+	.name		= BTCVSD_SND_NAME,
+	.probe		= mtk_btcvsd_snd_component_probe,
+	.open		= mtk_pcm_btcvsd_open,
+	.close		= mtk_pcm_btcvsd_close,
+	.hw_params	= mtk_pcm_btcvsd_hw_params,
+	.hw_free	= mtk_pcm_btcvsd_hw_free,
+	.prepare	= mtk_pcm_btcvsd_prepare,
+	.trigger	= mtk_pcm_btcvsd_trigger,
+	.pointer	= mtk_pcm_btcvsd_pointer,
+	.copy		= mtk_pcm_btcvsd_copy,
+};
+
+static int mtk_btcvsd_snd_probe(struct platform_device *pdev)
+{
+	int ret;
+	int irq_id;
+	u32 offset[5] = {0, 0, 0, 0, 0};
+	struct mtk_btcvsd_snd *btcvsd;
+	struct device *dev = &pdev->dev;
+
+	/* init btcvsd private data */
+	btcvsd = devm_kzalloc(dev, sizeof(*btcvsd), GFP_KERNEL);
+	if (!btcvsd)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, btcvsd);
+	btcvsd->dev = dev;
+
+	/* init tx/rx */
+	btcvsd->rx = devm_kzalloc(btcvsd->dev, sizeof(*btcvsd->rx), GFP_KERNEL);
+	if (!btcvsd->rx)
+		return -ENOMEM;
+
+	btcvsd->tx = devm_kzalloc(btcvsd->dev, sizeof(*btcvsd->tx), GFP_KERNEL);
+	if (!btcvsd->tx)
+		return -ENOMEM;
+
+	spin_lock_init(&btcvsd->tx_lock);
+	spin_lock_init(&btcvsd->rx_lock);
+
+	init_waitqueue_head(&btcvsd->tx_wait);
+	init_waitqueue_head(&btcvsd->rx_wait);
+
+	mtk_btcvsd_snd_tx_init(btcvsd);
+	mtk_btcvsd_snd_rx_init(btcvsd);
+
+	/* irq */
+	irq_id = platform_get_irq(pdev, 0);
+	if (irq_id <= 0)
+		return irq_id < 0 ? irq_id : -ENXIO;
+
+	ret = devm_request_irq(dev, irq_id, mtk_btcvsd_snd_irq_handler,
+			       IRQF_TRIGGER_LOW, "BTCVSD_ISR_Handle",
+			       (void *)btcvsd);
+	if (ret) {
+		dev_err(dev, "could not request_irq for BTCVSD_ISR_Handle\n");
+		return ret;
+	}
+
+	btcvsd->irq_id = irq_id;
+
+	/* iomap */
+	btcvsd->bt_pkv_base = of_iomap(dev->of_node, 0);
+	if (!btcvsd->bt_pkv_base) {
+		dev_err(dev, "iomap bt_pkv_base fail\n");
+		return -EIO;
+	}
+
+	btcvsd->bt_sram_bank2_base = of_iomap(dev->of_node, 1);
+	if (!btcvsd->bt_sram_bank2_base) {
+		dev_err(dev, "iomap bt_sram_bank2_base fail\n");
+		ret = -EIO;
+		goto unmap_pkv_err;
+	}
+
+	btcvsd->infra = syscon_regmap_lookup_by_phandle(dev->of_node,
+							"mediatek,infracfg");
+	if (IS_ERR(btcvsd->infra)) {
+		dev_err(dev, "cannot find infra controller: %ld\n",
+			PTR_ERR(btcvsd->infra));
+		ret = PTR_ERR(btcvsd->infra);
+		goto unmap_bank2_err;
+	}
+
+	/* get offset */
+	ret = of_property_read_u32_array(dev->of_node, "mediatek,offset",
+					 offset,
+					 ARRAY_SIZE(offset));
+	if (ret) {
+		dev_warn(dev, "%s(), get offset fail, ret %d\n", __func__, ret);
+		goto unmap_bank2_err;
+	}
+	btcvsd->infra_misc_offset = offset[0];
+	btcvsd->conn_bt_cvsd_mask = offset[1];
+	btcvsd->cvsd_mcu_read_offset = offset[2];
+	btcvsd->cvsd_mcu_write_offset = offset[3];
+	btcvsd->cvsd_packet_indicator = offset[4];
+
+	btcvsd->bt_reg_pkt_r = btcvsd->bt_pkv_base +
+			       btcvsd->cvsd_mcu_read_offset;
+	btcvsd->bt_reg_pkt_w = btcvsd->bt_pkv_base +
+			       btcvsd->cvsd_mcu_write_offset;
+	btcvsd->bt_reg_ctl = btcvsd->bt_pkv_base +
+			     btcvsd->cvsd_packet_indicator;
+
+	/* init state */
+	mtk_btcvsd_snd_set_state(btcvsd, btcvsd->tx, BT_SCO_STATE_IDLE);
+	mtk_btcvsd_snd_set_state(btcvsd, btcvsd->rx, BT_SCO_STATE_IDLE);
+
+	ret = devm_snd_soc_register_component(dev, &mtk_btcvsd_snd_platform,
+					      NULL, 0);
+	if (ret)
+		goto unmap_bank2_err;
+
+	return 0;
+
+unmap_bank2_err:
+	iounmap(btcvsd->bt_sram_bank2_base);
+unmap_pkv_err:
+	iounmap(btcvsd->bt_pkv_base);
+	return ret;
+}
+
+static void mtk_btcvsd_snd_remove(struct platform_device *pdev)
+{
+	struct mtk_btcvsd_snd *btcvsd = dev_get_drvdata(&pdev->dev);
+
+	iounmap(btcvsd->bt_pkv_base);
+	iounmap(btcvsd->bt_sram_bank2_base);
+}
+
+static const struct of_device_id mtk_btcvsd_snd_dt_match[] = {
+	{ .compatible = "mediatek,mtk-btcvsd-snd", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mtk_btcvsd_snd_dt_match);
+
+static struct platform_driver mtk_btcvsd_snd_driver = {
+	.driver = {
+		.name = "mtk-btcvsd-snd",
+		.of_match_table = mtk_btcvsd_snd_dt_match,
+	},
+	.probe = mtk_btcvsd_snd_probe,
+	.remove_new = mtk_btcvsd_snd_remove,
+};
+
+module_platform_driver(mtk_btcvsd_snd_driver);
+
+MODULE_DESCRIPTION("Mediatek ALSA BT SCO CVSD/MSBC Driver");
+MODULE_AUTHOR("KaiChieh Chuang <kaichieh.chuang@mediatek.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/mediatek/common/mtk-dsp-sof-common.c b/sound/soc/mediatek/common/mtk-dsp-sof-common.c
new file mode 100644
index 000000000..21a9403b7
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-dsp-sof-common.c
@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mtk-dsp-sof-common.c  --  MediaTek dsp sof common ctrl
+ *
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Chunxu Li <chunxu.li@mediatek.com>
+ */
+
+#include "mtk-dsp-sof-common.h"
+#include "mtk-soc-card.h"
+
+/* fixup the BE DAI link to match any values from topology */
+int mtk_sof_dai_link_fixup(struct snd_soc_pcm_runtime *rtd,
+			   struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_card *card = rtd->card;
+	struct mtk_soc_card_data *soc_card_data = snd_soc_card_get_drvdata(card);
+	struct mtk_sof_priv *sof_priv = soc_card_data->sof_priv;
+	int i, j, ret = 0;
+
+	for (i = 0; i < sof_priv->num_streams; i++) {
+		struct snd_soc_dai *cpu_dai;
+		struct snd_soc_pcm_runtime *runtime;
+		struct snd_soc_dai_link *sof_dai_link = NULL;
+		const struct sof_conn_stream *conn = &sof_priv->conn_streams[i];
+
+		if (conn->normal_link && strcmp(rtd->dai_link->name, conn->normal_link))
+			continue;
+
+		for_each_card_rtds(card, runtime) {
+			if (strcmp(runtime->dai_link->name, conn->sof_link))
+				continue;
+
+			for_each_rtd_cpu_dais(runtime, j, cpu_dai) {
+				if (snd_soc_dai_stream_active(cpu_dai, conn->stream_dir) > 0) {
+					sof_dai_link = runtime->dai_link;
+					break;
+				}
+			}
+			break;
+		}
+
+		if (sof_dai_link && sof_dai_link->be_hw_params_fixup)
+			ret = sof_dai_link->be_hw_params_fixup(runtime, params);
+
+		break;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mtk_sof_dai_link_fixup);
+
+int mtk_sof_card_probe(struct snd_soc_card *card)
+{
+	int i;
+	struct snd_soc_dai_link *dai_link;
+
+	/* Set stream_name to help sof bind widgets */
+	for_each_card_prelinks(card, i, dai_link) {
+		if (dai_link->no_pcm && !dai_link->stream_name && dai_link->name)
+			dai_link->stream_name = dai_link->name;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_sof_card_probe);
+
+int mtk_sof_card_late_probe(struct snd_soc_card *card)
+{
+	struct snd_soc_pcm_runtime *rtd;
+	struct snd_soc_component *sof_comp = NULL;
+	struct mtk_soc_card_data *soc_card_data =
+		snd_soc_card_get_drvdata(card);
+	struct mtk_sof_priv *sof_priv = soc_card_data->sof_priv;
+	int i;
+
+	/* 1. find sof component */
+	for_each_card_rtds(card, rtd) {
+		sof_comp = snd_soc_rtdcom_lookup(rtd, "sof-audio-component");
+		if (sof_comp)
+			break;
+	}
+
+	if (!sof_comp) {
+		dev_info(card->dev, "probe without sof-audio-component\n");
+		return 0;
+	}
+
+	/* 2. add route path and fixup callback */
+	for (i = 0; i < sof_priv->num_streams; i++) {
+		const struct sof_conn_stream *conn = &sof_priv->conn_streams[i];
+		struct snd_soc_pcm_runtime *sof_rtd = NULL;
+		struct snd_soc_pcm_runtime *normal_rtd = NULL;
+
+		for_each_card_rtds(card, rtd) {
+			if (!strcmp(rtd->dai_link->name, conn->sof_link)) {
+				sof_rtd = rtd;
+				continue;
+			}
+			if (!strcmp(rtd->dai_link->name, conn->normal_link)) {
+				normal_rtd = rtd;
+				continue;
+			}
+			if (normal_rtd && sof_rtd)
+				break;
+		}
+		if (normal_rtd && sof_rtd) {
+			int j;
+			struct snd_soc_dai *cpu_dai;
+
+			for_each_rtd_cpu_dais(sof_rtd, j, cpu_dai) {
+				struct snd_soc_dapm_route route;
+				struct snd_soc_dapm_path *p = NULL;
+				struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(cpu_dai, conn->stream_dir);
+
+				memset(&route, 0, sizeof(route));
+				if (conn->stream_dir == SNDRV_PCM_STREAM_CAPTURE && widget) {
+					snd_soc_dapm_widget_for_each_sink_path(widget, p) {
+						route.source = conn->sof_dma;
+						route.sink = p->sink->name;
+						snd_soc_dapm_add_routes(&card->dapm, &route, 1);
+					}
+				} else if (conn->stream_dir == SNDRV_PCM_STREAM_PLAYBACK && widget) {
+					snd_soc_dapm_widget_for_each_source_path(widget, p) {
+						route.source = p->source->name;
+						route.sink = conn->sof_dma;
+						snd_soc_dapm_add_routes(&card->dapm, &route, 1);
+					}
+				} else {
+					dev_err(cpu_dai->dev, "stream dir and widget not pair\n");
+				}
+			}
+
+			sof_rtd->dai_link->be_hw_params_fixup =
+				sof_comp->driver->be_hw_params_fixup;
+			if (sof_priv->sof_dai_link_fixup)
+				normal_rtd->dai_link->be_hw_params_fixup =
+					sof_priv->sof_dai_link_fixup;
+			else
+				normal_rtd->dai_link->be_hw_params_fixup = mtk_sof_dai_link_fixup;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_sof_card_late_probe);
+
+int mtk_sof_dailink_parse_of(struct snd_soc_card *card, struct device_node *np,
+			     const char *propname, struct snd_soc_dai_link *pre_dai_links,
+			     int pre_num_links)
+{
+	struct device *dev = card->dev;
+	struct snd_soc_dai_link *parsed_dai_link;
+	const char *dai_name = NULL;
+	int i, j, ret, num_links, parsed_num_links = 0;
+
+	num_links = of_property_count_strings(np, "mediatek,dai-link");
+	if (num_links < 0 || num_links > card->num_links) {
+		dev_dbg(dev, "number of dai-link is invalid\n");
+		return -EINVAL;
+	}
+
+	parsed_dai_link = devm_kcalloc(dev, num_links, sizeof(*parsed_dai_link), GFP_KERNEL);
+	if (!parsed_dai_link)
+		return -ENOMEM;
+
+	for (i = 0; i < num_links; i++) {
+		ret = of_property_read_string_index(np, propname, i, &dai_name);
+		if (ret) {
+			dev_dbg(dev, "ASoC: Property '%s' index %d could not be read: %d\n",
+				propname, i, ret);
+			return ret;
+		}
+		dev_dbg(dev, "ASoC: Property get dai_name:%s\n", dai_name);
+		for (j = 0; j < pre_num_links; j++) {
+			if (!strcmp(dai_name, pre_dai_links[j].name)) {
+				memcpy(&parsed_dai_link[parsed_num_links++], &pre_dai_links[j],
+				       sizeof(struct snd_soc_dai_link));
+				break;
+			}
+		}
+	}
+
+	if (parsed_num_links != num_links)
+		return -EINVAL;
+
+	card->dai_link = parsed_dai_link;
+	card->num_links = parsed_num_links;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_sof_dailink_parse_of);
diff --git a/sound/soc/mediatek/common/mtk-dsp-sof-common.h b/sound/soc/mediatek/common/mtk-dsp-sof-common.h
new file mode 100644
index 000000000..dd38c4a93
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-dsp-sof-common.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * mtk-dsp-sof-common.h  --  MediaTek dsp sof common definition
+ *
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Chunxu Li <chunxu.li@mediatek.com>
+ */
+
+#ifndef _MTK_DSP_SOF_COMMON_H_
+#define _MTK_DSP_SOF_COMMON_H_
+
+#include <sound/soc.h>
+
+struct sof_conn_stream {
+	const char *normal_link;
+	const char *sof_link;
+	const char *sof_dma;
+	int stream_dir;
+};
+
+struct mtk_sof_priv {
+	const struct sof_conn_stream *conn_streams;
+	int num_streams;
+	int (*sof_dai_link_fixup)(struct snd_soc_pcm_runtime *rtd,
+				  struct snd_pcm_hw_params *params);
+};
+
+int mtk_sof_dai_link_fixup(struct snd_soc_pcm_runtime *rtd,
+			   struct snd_pcm_hw_params *params);
+int mtk_sof_card_probe(struct snd_soc_card *card);
+int mtk_sof_card_late_probe(struct snd_soc_card *card);
+int mtk_sof_dailink_parse_of(struct snd_soc_card *card, struct device_node *np,
+			     const char *propname, struct snd_soc_dai_link *pre_dai_links,
+			     int pre_num_links);
+
+#endif
diff --git a/sound/soc/mediatek/common/mtk-soc-card.h b/sound/soc/mediatek/common/mtk-soc-card.h
new file mode 100644
index 000000000..eeda79370
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-soc-card.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * mtk-soc-card.h  --  MediaTek soc card data definition
+ *
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Chunxu Li <chunxu.li@mediatek.com>
+ */
+
+#ifndef _MTK_SOC_CARD_H_
+#define _MTK_SOC_CARD_H_
+
+struct mtk_soc_card_data {
+	void *mach_priv;
+	void *sof_priv;
+};
+
+#endif
diff --git a/sound/soc/mediatek/common/mtk-soundcard-driver.c b/sound/soc/mediatek/common/mtk-soundcard-driver.c
new file mode 100644
index 000000000..a58e1e367
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-soundcard-driver.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mtk-soundcard-driver.c  --  MediaTek soundcard driver common
+ *
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Trevor Wu <trevor.wu@mediatek.com>
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <sound/soc.h>
+
+#include "mtk-soundcard-driver.h"
+
+static int set_card_codec_info(struct snd_soc_card *card,
+			       struct device_node *sub_node,
+			       struct snd_soc_dai_link *dai_link)
+{
+	struct device *dev = card->dev;
+	struct device_node *codec_node;
+	int ret;
+
+	codec_node = of_get_child_by_name(sub_node, "codec");
+	if (!codec_node) {
+		dev_dbg(dev, "%s no specified codec\n", dai_link->name);
+		return 0;
+	}
+
+	/* set card codec info */
+	ret = snd_soc_of_get_dai_link_codecs(dev, codec_node, dai_link);
+
+	of_node_put(codec_node);
+
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "%s: codec dai not found\n",
+				     dai_link->name);
+
+	return 0;
+}
+
+static int set_dailink_daifmt(struct snd_soc_card *card,
+			      struct device_node *sub_node,
+			      struct snd_soc_dai_link *dai_link)
+{
+	unsigned int daifmt;
+	const char *str;
+	int ret;
+	struct {
+		char *name;
+		unsigned int val;
+	} of_clk_table[] = {
+		{ "cpu",	SND_SOC_DAIFMT_CBC_CFC },
+		{ "codec",	SND_SOC_DAIFMT_CBP_CFP },
+	};
+
+	daifmt = snd_soc_daifmt_parse_format(sub_node, NULL);
+	if (daifmt) {
+		dai_link->dai_fmt &= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
+		dai_link->dai_fmt |= daifmt;
+	}
+
+	/*
+	 * check "mediatek,clk-provider = xxx"
+	 * SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK area
+	 */
+	ret = of_property_read_string(sub_node, "mediatek,clk-provider", &str);
+	if (ret == 0) {
+		int i;
+
+		for (i = 0; i < ARRAY_SIZE(of_clk_table); i++) {
+			if (strcmp(str, of_clk_table[i].name) == 0) {
+				dai_link->dai_fmt &= ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
+				dai_link->dai_fmt |= of_clk_table[i].val;
+				break;
+			}
+		}
+	}
+
+	return 0;
+}
+
+int parse_dai_link_info(struct snd_soc_card *card)
+{
+	struct device *dev = card->dev;
+	struct device_node *sub_node;
+	struct snd_soc_dai_link *dai_link;
+	const char *dai_link_name;
+	int ret, i;
+
+	/* Loop over all the dai link sub nodes */
+	for_each_available_child_of_node(dev->of_node, sub_node) {
+		if (of_property_read_string(sub_node, "link-name",
+					    &dai_link_name)) {
+			of_node_put(sub_node);
+			return -EINVAL;
+		}
+
+		for_each_card_prelinks(card, i, dai_link) {
+			if (!strcmp(dai_link_name, dai_link->name))
+				break;
+		}
+
+		if (i >= card->num_links) {
+			of_node_put(sub_node);
+			return -EINVAL;
+		}
+
+		ret = set_card_codec_info(card, sub_node, dai_link);
+		if (ret < 0) {
+			of_node_put(sub_node);
+			return ret;
+		}
+
+		ret = set_dailink_daifmt(card, sub_node, dai_link);
+		if (ret < 0) {
+			of_node_put(sub_node);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(parse_dai_link_info);
+
+void clean_card_reference(struct snd_soc_card *card)
+{
+	struct snd_soc_dai_link *dai_link;
+	int i;
+
+	/* release codec reference gotten by set_card_codec_info */
+	for_each_card_prelinks(card, i, dai_link)
+		snd_soc_of_put_dai_link_codecs(dai_link);
+}
+EXPORT_SYMBOL_GPL(clean_card_reference);
diff --git a/sound/soc/mediatek/common/mtk-soundcard-driver.h b/sound/soc/mediatek/common/mtk-soundcard-driver.h
new file mode 100644
index 000000000..d92cac1d7
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-soundcard-driver.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * mtk-soundcard-driver.h  --  MediaTek soundcard driver common definition
+ *
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Trevor Wu <trevor.wu@mediatek.com>
+ */
+
+#ifndef _MTK_SOUNDCARD_DRIVER_H_
+#define _MTK_SOUNDCARD_DRIVER_H_
+
+int parse_dai_link_info(struct snd_soc_card *card);
+void clean_card_reference(struct snd_soc_card *card);
+#endif