Message-Id: <E1bIKyS-0007E7-4H@finisterre>
Date:	Wed, 29 Jun 2016 20:16:36 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Garlic Tseng <garlic.tseng@...iatek.com>
Cc:	Mark Brown <broonie@...nel.org>, broonie@...nel.org, tiwai@...e.de,
	alsa-devel@...a-project.org, ir.lian@...iatek.com,
	srv_heupstream@...iatek.com, garlic.tseng@...iatek.com,
	linux-kernel@...r.kernel.org, koro.chen@...iatek.com,
	linux-mediatek@...ts.infradead.org, PC.Liao@...iatek.com,
	linux-arm-kernel@...ts.infradead.org
Subject: Applied "ASoC: mediatek: implement mediatek common structure" to the asoc tree

The patch

   ASoC: mediatek: implement mediatek common structure

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 283b612429a279b4c8f5a90f38d26c80bf8ec628 Mon Sep 17 00:00:00 2001
From: Garlic Tseng <garlic.tseng@...iatek.com>
Date: Fri, 17 Jun 2016 15:43:53 +0800
Subject: [PATCH] ASoC: mediatek: implement mediatek common structure

implement mediatek basic structure, include common private data,
afe fe dai operator and afe platform driver.

Signed-off-by: Garlic Tseng <garlic.tseng@...iatek.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 sound/soc/mediatek/common/mtk-afe-fe-dai.c         | 379 +++++++++++++++++++++
 sound/soc/mediatek/common/mtk-afe-fe-dai.h         |  45 +++
 .../soc/mediatek/common/mtk-afe-platform-driver.c  |  90 +++++
 .../soc/mediatek/common/mtk-afe-platform-driver.h  |  23 ++
 sound/soc/mediatek/common/mtk-base-afe.h           | 104 ++++++
 5 files changed, 641 insertions(+)
 create mode 100644 sound/soc/mediatek/common/mtk-afe-fe-dai.c
 create mode 100644 sound/soc/mediatek/common/mtk-afe-fe-dai.h
 create mode 100644 sound/soc/mediatek/common/mtk-afe-platform-driver.c
 create mode 100644 sound/soc/mediatek/common/mtk-afe-platform-driver.h
 create mode 100644 sound/soc/mediatek/common/mtk-base-afe.h

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 000000000000..b788791b0a35
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-afe-fe-dai.c
@@ -0,0 +1,379 @@
+/*
+ * mtk-afe-fe-dais.c  --  Mediatek afe fe dai operator
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@...iatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+#include "mtk-afe-fe-dai.h"
+#include "mtk-base-afe.h"
+
+#define AFE_BASE_END_OFFSET 8
+
+int mtk_regmap_update_bits(struct regmap *map, int reg, unsigned int mask,
+			   unsigned int val)
+{
+	if (reg < 0)
+		return 0;
+	return regmap_update_bits(map, reg, mask, val);
+}
+
+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 = substream->private_data;
+	struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int memif_num = rtd->cpu_dai->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 << memif->data->agent_disable_shift,
+			       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 = substream->private_data;
+	struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+	int irq_id;
+
+	irq_id = memif->irq_usage;
+
+	mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
+			       1 << memif->data->agent_disable_shift,
+			       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 = substream->private_data;
+	struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+	int msb_at_bit33 = 0;
+	int ret, fs = 0;
+
+	ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
+	if (ret < 0)
+		return ret;
+
+	msb_at_bit33 = upper_32_bits(substream->runtime->dma_addr) ? 1 : 0;
+	memif->phys_buf_addr = lower_32_bits(substream->runtime->dma_addr);
+	memif->buffer_size = substream->runtime->dma_bytes;
+
+	/* start */
+	mtk_regmap_write(afe->regmap, memif->data->reg_ofs_base,
+			 memif->phys_buf_addr);
+	/* end */
+	mtk_regmap_write(afe->regmap,
+			 memif->data->reg_ofs_base + AFE_BASE_END_OFFSET,
+			 memif->phys_buf_addr + memif->buffer_size - 1);
+
+	/* set MSB to 33-bit */
+	mtk_regmap_update_bits(afe->regmap, memif->data->msb_reg,
+			       1 << memif->data->msb_shift,
+			       msb_at_bit33 << memif->data->msb_shift);
+
+	/* set channel */
+	if (memif->data->mono_shift >= 0) {
+		unsigned int mono = (params_channels(params) == 1) ? 1 : 0;
+
+		mtk_regmap_update_bits(afe->regmap, memif->data->mono_reg,
+				       1 << memif->data->mono_shift,
+				       mono << memif->data->mono_shift);
+	}
+
+	/* set rate */
+	if (memif->data->fs_shift < 0)
+		return 0;
+
+	fs = afe->memif_fs(substream, params_rate(params));
+
+	if (fs < 0)
+		return -EINVAL;
+
+	mtk_regmap_update_bits(afe->regmap, memif->data->fs_reg,
+			       memif->data->fs_maskbit << memif->data->fs_shift,
+			       fs << memif->data->fs_shift);
+
+	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)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+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 = substream->private_data;
+	struct snd_pcm_runtime * const runtime = substream->runtime;
+	struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->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;
+
+	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:
+		if (memif->data->enable_shift >= 0)
+			mtk_regmap_update_bits(afe->regmap,
+					       memif->data->enable_reg,
+					       1 << memif->data->enable_shift,
+					       1 << memif->data->enable_shift);
+
+		/* set irq counter */
+		mtk_regmap_update_bits(afe->regmap, irq_data->irq_cnt_reg,
+				       irq_data->irq_cnt_maskbit
+				       << irq_data->irq_cnt_shift,
+				       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
+				       << irq_data->irq_fs_shift,
+				       fs << irq_data->irq_fs_shift);
+
+		/* enable interrupt */
+		mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
+				       1 << irq_data->irq_en_shift,
+				       1 << irq_data->irq_en_shift);
+
+		return 0;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		mtk_regmap_update_bits(afe->regmap, memif->data->enable_reg,
+				       1 << memif->data->enable_shift, 0);
+		/* disable interrupt */
+		mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
+				       1 << irq_data->irq_en_shift,
+				       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 0;
+	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  = substream->private_data;
+	struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+	int hd_audio = 0;
+
+	/* set hd mode */
+	switch (substream->runtime->format) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		hd_audio = 0;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		hd_audio = 1;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		hd_audio = 1;
+		break;
+	default:
+		dev_err(afe->dev, "%s() error: unsupported format %d\n",
+			__func__, substream->runtime->format);
+		break;
+	}
+
+	mtk_regmap_update_bits(afe->regmap, memif->data->hd_reg,
+			       1 << memif->data->hd_shift,
+			       hd_audio << memif->data->hd_shift);
+
+	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);
+
+static DEFINE_MUTEX(irqs_lock);
+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_dai_suspend(struct snd_soc_dai *dai)
+{
+	struct mtk_base_afe *afe = dev_get_drvdata(dai->dev);
+	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);
+
+	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_dai_suspend);
+
+int mtk_afe_dai_resume(struct snd_soc_dai *dai)
+{
+	struct mtk_base_afe *afe = dev_get_drvdata(dai->dev);
+	struct device *dev = afe->dev;
+	struct regmap *regmap = afe->regmap;
+	int i = 0;
+
+	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__);
+
+	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_dai_resume);
+
+MODULE_DESCRIPTION("Mediatek simple fe dai operator");
+MODULE_AUTHOR("Garlic Tseng <garlic.tseng@...iatek.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 000000000000..28cb17854da1
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-afe-fe-dai.h
@@ -0,0 +1,45 @@
+/*
+ * mtk-afe-fe-dais.h  --  Mediatek afe fe dai operator definition
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@...iatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _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_dai_suspend(struct snd_soc_dai *dai);
+int mtk_afe_dai_resume(struct snd_soc_dai *dai);
+
+#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 000000000000..82d439c15f4e
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-afe-platform-driver.c
@@ -0,0 +1,90 @@
+/*
+ * mtk-afe-platform-driver.c  --  Mediatek afe platform driver
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@...iatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <sound/soc.h>
+
+#include "mtk-afe-platform-driver.h"
+#include "mtk-base-afe.h"
+
+static snd_pcm_uframes_t mtk_afe_pcm_pointer
+			 (struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+	struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->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);
+}
+
+static const struct snd_pcm_ops mtk_afe_pcm_ops = {
+	.ioctl = snd_pcm_lib_ioctl,
+	.pointer = mtk_afe_pcm_pointer,
+};
+
+static int mtk_afe_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+	size_t size;
+	struct snd_card *card = rtd->card->snd_card;
+	struct snd_pcm *pcm = rtd->pcm;
+	struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+
+	size = afe->mtk_afe_hardware->buffer_bytes_max;
+	return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+						     card->dev, size, size);
+}
+
+static void mtk_afe_pcm_free(struct snd_pcm *pcm)
+{
+	snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+const struct snd_soc_platform_driver mtk_afe_pcm_platform = {
+	.ops = &mtk_afe_pcm_ops,
+	.pcm_new = mtk_afe_pcm_new,
+	.pcm_free = mtk_afe_pcm_free,
+};
+EXPORT_SYMBOL_GPL(mtk_afe_pcm_platform);
+
+MODULE_DESCRIPTION("Mediatek simple platform driver");
+MODULE_AUTHOR("Garlic Tseng <garlic.tseng@...iatek.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 000000000000..a973fc9253b4
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-afe-platform-driver.h
@@ -0,0 +1,23 @@
+/*
+ * mtk-afe-platform-driver.h  --  Mediatek afe platform driver definition
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@...iatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _MTK_AFE_PLATFORM_DRIVER_H_
+#define _MTK_AFE_PLATFORM_DRIVER_H_
+
+extern const struct snd_soc_platform_driver mtk_afe_pcm_platform;
+
+#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 000000000000..3a78f6f17195
--- /dev/null
+++ b/sound/soc/mediatek/common/mtk-base-afe.h
@@ -0,0 +1,104 @@
+/*
+ * mtk-base-afe.h  --  Mediatek base afe structure
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@...iatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _MTK_BASE_AFE_H_
+#define _MTK_BASE_AFE_H_
+
+struct mtk_base_memif_data {
+	int id;
+	const char *name;
+	int reg_ofs_base;
+	int reg_ofs_cur;
+	int fs_reg;
+	int fs_shift;
+	int fs_maskbit;
+	int mono_reg;
+	int mono_shift;
+	int enable_reg;
+	int enable_shift;
+	int hd_reg;
+	int hd_shift;
+	int msb_reg;
+	int msb_shift;
+	int agent_disable_reg;
+	int agent_disable_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;
+};
+
+struct device;
+struct mtk_base_afe_memif;
+struct mtk_base_afe_irq;
+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;
+
+	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);
+
+	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;
+};
+
+struct mtk_base_afe_irq {
+	const struct mtk_base_irq_data *irq_data;
+	int irq_occupyed;
+};
+
+#endif
+
-- 
2.8.1

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