sound/soc/amlogic/meson/pcm_dai.c - manifest_repos/kernel - Git at Google

 /*
  * sound/soc/amlogic/meson/pcm_dai.c
  *
  * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * 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.
  *
  */
 #undef pr_fmt
 #define pr_fmt(fmt) "snd_pcm_dai: " fmt

 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/device.h>
 #include <linux/delay.h>
 #include <linux/clk.h>
 #include <linux/gpio/consumer.h>
 #include <linux/pinctrl/consumer.h>

 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/initval.h>
 #include <sound/soc.h>

 #include "pcm_dai.h"
 #include "pcm.h"
 #include "i2s.h"
 #include "audio_hw_pcm.h"

 #include <linux/of.h>

 #define DEV_NAME "aml-pcm-dai"

 #define AML_DAI_PCM_RATES		(SNDRV_PCM_RATE_8000_192000)
 #define AML_DAI_PCM_FORMATS		(SNDRV_PCM_FMTBIT_S16_LE |\
 	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

 #define PCM_DEFAULT_SAMPLERATE 8000
 #define PCM_DEFAULT_MCLK_RATIO_SR 256
 #define PCM_24BIT_MCLK_RATIO_SR 384
 #define PCM_32BIT_MCLK_RATIO_SR 512

 static int aml_pcm_set_clk(struct aml_pcm *pcm, unsigned long rate)
 {
 	int ret = 0;

 	ret = clk_set_rate(pcm->clk_mpll, rate * 60);
 	if (ret) {
 		pr_info("Cannot set pcm mpll\n");
 		return ret;
 	}
 	ret = clk_set_parent(pcm->clk_pcm_mclk, pcm->clk_mpll);
 	if (ret) {
 		pr_info("Cannot set pcm mclk parent\n");
 		return ret;
 	}

 	ret = clk_set_rate(pcm->clk_pcm_mclk, rate);
 	if (ret) {
 		pr_info("Cannot set pcm mclk rate:%lu\n", rate);
 		return ret;
 	}

 	return 0;
 }

 static int aml_pcm_dai_startup(struct snd_pcm_substream *substream,
 			       struct snd_soc_dai *dai)
 {
 	pr_debug("***Entered %s\n", __func__);
 	return 0;
 }

 static void aml_pcm_dai_shutdown(struct snd_pcm_substream *substream,
 				 struct snd_soc_dai *dai)
 {
 	pr_debug("***Entered %s\n", __func__);
 }

 static int aml_pcm_dai_prepare(struct snd_pcm_substream *substream,
 			       struct snd_soc_dai *dai)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct aml_pcm_runtime_data *prtd = runtime->private_data;
 	struct aml_pcm *pcm = snd_soc_dai_get_drvdata(dai);
 	int mclk_rate, pcm_bit;

 	pr_debug("***Entered %s\n", __func__);

 	/* set bclk */
 	if (runtime->format == SNDRV_PCM_FORMAT_S32_LE)
 		pcm_bit = 32;
 	else if (runtime->format == SNDRV_PCM_FORMAT_S24_LE)
 		pcm_bit = 24;
 	else
 		pcm_bit = 16;

 	mclk_rate = runtime->rate * pcm_bit * runtime->channels;
 	pr_info("%s rate:%d, bits:%d, channels:%d, mclk:%d\n",
 		__func__,
 		runtime->rate,
 		pcm_bit,
 		runtime->channels,
 		mclk_rate);

 	aml_pcm_set_clk(pcm, mclk_rate);

 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		pr_info(
 		       "%s playback stream buffer start: %ld size: 0x%x\n",
 		       __func__, (long)prtd->buffer_start, prtd->buffer_size);
 		pcm_out_set_buf(prtd->buffer_start, prtd->buffer_size);
 	} else {
 		pr_info(
 		       "%s capture stream buffer start: %ld size: 0x%x\n",
 		       __func__, (long)prtd->buffer_start, prtd->buffer_size);
 		pcm_in_set_buf(prtd->buffer_start, prtd->buffer_size);
 	}

 	memset(runtime->dma_area, 0, runtime->dma_bytes);
 	prtd->buffer_offset = 0;
 	prtd->data_size = 0;
 	prtd->period_elapsed = 0;

 	return 0;
 }

 static int aml_pcm_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 			       struct snd_soc_dai *dai)
 {
 	struct aml_pcm *pcm_p = dev_get_drvdata(dai->dev);

 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		/* TODO */
 		if (pcm_p && pcm_p->pcm_mode) {
 			pr_info("aiu pcm master stream %d enable\n\n",
 				substream->stream);
 			if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 				pcm_master_out_enable(substream, 1);
 			else
 				pcm_master_in_enable(substream, 1);
 		} else {
 			pr_info("aiu slave pcm stream %d enable\n\n",
 				substream->stream);
 			if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 				pcm_out_enable(substream, 1);
 			else
 				pcm_in_enable(substream, 1);
 		}
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		if (pcm_p && pcm_p->pcm_mode) {
 			pr_info("aiu master pcm stream %d disable\n\n",
 				substream->stream);
 			if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 				pcm_master_out_enable(substream, 0);
 			else
 				pcm_master_in_enable(substream, 0);
 		} else {
 			pr_info("aiu slave pcm stream %d disable\n\n",
 				substream->stream);
 			if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 				pcm_out_enable(substream, 0);
 			else
 				pcm_in_enable(substream, 0);
 		}
 		break;
 	default:
 		return -EINVAL;
 	}

 	return 0;
 }

 static int aml_pcm_dai_hw_params(struct snd_pcm_substream *substream,
 				 struct snd_pcm_hw_params *params,
 				 struct snd_soc_dai *dai)
 {
 	pr_debug("***Entered %s:%s\n", __FILE__, __func__);
 	return 0;
 }

 static int aml_pcm_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 {
 	pr_debug("***Entered %s\n", __func__);

 	aml_set_pcm_format(fmt & SND_SOC_DAIFMT_FORMAT_MASK);

 	return 0;
 }

 static int aml_pcm_dai_set_sysclk(struct snd_soc_dai *dai,
 				  int clk_id, unsigned int freq, int dir)
 {
 	pr_debug("***Entered %s\n", __func__);
 	return 0;
 }

 #ifdef CONFIG_PM
 static int aml_pcm_dai_suspend(struct snd_soc_dai *dai)
 {

 	pr_debug("***Entered %s\n", __func__);
 	return 0;
 }

 static int aml_pcm_dai_resume(struct snd_soc_dai *dai)
 {
 	pr_debug("***Entered %s\n", __func__);
 	return 0;
 }

 #else				/* CONFIG_PM */
 #define aml_pcm_dai_suspend	NULL
 #define aml_pcm_dai_resume	NULL
 #endif				/* CONFIG_PM */


 static struct snd_soc_dai_ops aml_pcm_dai_ops = {
 	.startup = aml_pcm_dai_startup,
 	.shutdown = aml_pcm_dai_shutdown,
 	.prepare = aml_pcm_dai_prepare,
 	.trigger = aml_pcm_dai_trigger,
 	.hw_params = aml_pcm_dai_hw_params,
 	.set_fmt = aml_pcm_dai_set_fmt,
 	.set_sysclk = aml_pcm_dai_set_sysclk,
 };

 struct snd_soc_dai_driver aml_pcm_dai[] = {
 	{
 	 .suspend = aml_pcm_dai_suspend,
 	 .resume = aml_pcm_dai_resume,
 	 .playback = {
 		      .channels_min = 1,
 		      .channels_max = 16,
 		      .rates = AML_DAI_PCM_RATES,
 		      .formats = AML_DAI_PCM_FORMATS,},
 	 .capture = {
 		     .channels_min = 1,
 		     .channels_max = 16,
 		     .rates = AML_DAI_PCM_RATES,
 		     .formats = AML_DAI_PCM_FORMATS,},
 	 .ops = &aml_pcm_dai_ops,
 	 },

 };
 EXPORT_SYMBOL_GPL(aml_pcm_dai);

 static const struct snd_soc_component_driver aml_component = {
 	.name = DEV_NAME,
 };

 static int aml_pcm_dai_probe(struct platform_device *pdev)
 {
 	struct pinctrl *pin_ctl;
 	struct aml_pcm *pcm_p = NULL;
 	int ret;

 	pr_debug("enter %s\n", __func__);

 	pin_ctl = devm_pinctrl_get_select(&pdev->dev, "audio_pcm");
 	if (IS_ERR(pin_ctl)) {
 		pin_ctl = NULL;
 		pr_err("aml audio pcm dai pinmux set error!\n");
 	}

 	pcm_p = devm_kzalloc(&pdev->dev, sizeof(struct aml_pcm), GFP_KERNEL);
 	if (!pcm_p) {
 		/*dev_err(&pdev->dev, "Can't allocate pcm_p\n");*/
 		ret = -ENOMEM;
 		goto err;
 	}
 	dev_set_drvdata(&pdev->dev, pcm_p);

 	/* is PCM master? */
 	ret =
 	    of_property_read_u32((&pdev->dev)->of_node, "pcm_mode",
 				 &pcm_p->pcm_mode);

 	pr_info("pcm mode detection =%d\n", pcm_p->pcm_mode);

 	if (pcm_p->pcm_mode) {
 		pcm_p->clk_mpll = devm_clk_get(&pdev->dev, "mpll0");
 		if (IS_ERR(pcm_p->clk_mpll)) {
 			dev_err(&pdev->dev, "Can't retrieve mpll0 clock\n");
 			ret = PTR_ERR(pcm_p->clk_mpll);
 			goto err;
 		}

 		pcm_p->clk_pcm_mclk = devm_clk_get(&pdev->dev, "pcm_mclk");
 		if (IS_ERR(pcm_p->clk_pcm_mclk)) {
 			dev_err(&pdev->dev, "Can't retrieve clk_pcm_mclk clock\n");
 			ret = PTR_ERR(pcm_p->clk_pcm_mclk);
 			goto err;
 		}
 		pcm_p->clk_pcm_sync = devm_clk_get(&pdev->dev, "pcm_sclk");
 		if (IS_ERR(pcm_p->clk_pcm_sync)) {
 			dev_err(&pdev->dev, "Can't retrieve clk_pcm_sync clock\n");
 			ret = PTR_ERR(pcm_p->clk_pcm_sync);
 			goto err;
 		}

 		/* Default 256fs */
 		ret = aml_pcm_set_clk(pcm_p,
 			PCM_DEFAULT_SAMPLERATE * PCM_DEFAULT_MCLK_RATIO_SR);
 		if (ret < 0) {
 			dev_err(&pdev->dev, "Can't set aml_pcm clk :%d\n", ret);
 			goto err;
 		}

 		ret = clk_prepare_enable(pcm_p->clk_pcm_mclk);
 		if (ret) {
 			dev_err(&pdev->dev,
 			"Can't enable pcm clk_pcm_mclk clock: %d\n", ret);
 			goto err;
 		}
 		ret = clk_prepare_enable(pcm_p->clk_pcm_sync);
 		if (ret) {
 			dev_err(&pdev->dev,
 			"Can't enable pcm clk_pcm_sync clock: %d\n", ret);
 			goto err;
 		}
 	}

 	ret = snd_soc_register_component(&pdev->dev, &aml_component,
 					  aml_pcm_dai, ARRAY_SIZE(aml_pcm_dai));

 err:
 	return ret;

 }

 static int aml_pcm_dai_remove(struct platform_device *pdev)
 {
 	struct aml_pcm *pcm_priv = dev_get_drvdata(&pdev->dev);

 	clk_disable_unprepare(pcm_priv->clk_pcm_mclk);
 	clk_disable_unprepare(pcm_priv->clk_pcm_sync);

 	snd_soc_unregister_component(&pdev->dev);
 	return 0;
 }

 static void aml_pcm_dai_plat_shutdown(struct platform_device *pdev)
 {
 	struct aml_pcm *pcm_priv = dev_get_drvdata(&pdev->dev);

 	clk_disable_unprepare(pcm_priv->clk_pcm_mclk);
 	clk_disable_unprepare(pcm_priv->clk_pcm_sync);

 	snd_soc_unregister_component(&pdev->dev);
 }

 #ifdef CONFIG_OF
 static const struct of_device_id amlogic_pcm_dai_match[] = {
 	{.compatible = "amlogic, aml-pcm-dai",
 	 },
 	{},
 };
 #else
 #define amlogic_pcm_dai_match NULL
 #endif

 static struct platform_driver aml_pcm_dai_driver = {
 	.driver = {
 		   .name = DEV_NAME,
 		   .owner = THIS_MODULE,
 		   .of_match_table = amlogic_pcm_dai_match,
 		   },

 	.probe = aml_pcm_dai_probe,
 	.remove = aml_pcm_dai_remove,
 	.shutdown = aml_pcm_dai_plat_shutdown,
 };

 static int __init aml_pcm_dai_modinit(void)
 {
 	return platform_driver_register(&aml_pcm_dai_driver);
 }

 module_init(aml_pcm_dai_modinit);

 static void __exit aml_pcm_dai_modexit(void)
 {
 	platform_driver_unregister(&aml_pcm_dai_driver);
 }

 module_exit(aml_pcm_dai_modexit);

 /* Module information */
 MODULE_AUTHOR("AMLogic, Inc.");
 MODULE_DESCRIPTION("AML DAI driver for ALSA");
 MODULE_LICENSE("GPL");
	/*
	* sound/soc/amlogic/meson/pcm_dai.c
	*
	* Copyright (C) 2017 Amlogic, Inc. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* 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.
	*
	*/
	#undef pr_fmt
	#define pr_fmt(fmt) "snd_pcm_dai: " fmt

	#include <linux/init.h>
	#include <linux/module.h>
	#include <linux/interrupt.h>
	#include <linux/device.h>
	#include <linux/delay.h>
	#include <linux/clk.h>
	#include <linux/gpio/consumer.h>
	#include <linux/pinctrl/consumer.h>

	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/pcm_params.h>
	#include <sound/initval.h>
	#include <sound/soc.h>

	#include "pcm_dai.h"
	#include "pcm.h"
	#include "i2s.h"
	#include "audio_hw_pcm.h"

	#include <linux/of.h>

	#define DEV_NAME "aml-pcm-dai"

	#define AML_DAI_PCM_RATES (SNDRV_PCM_RATE_8000_192000)
	#define AML_DAI_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \|\
	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)

	#define PCM_DEFAULT_SAMPLERATE 8000
	#define PCM_DEFAULT_MCLK_RATIO_SR 256
	#define PCM_24BIT_MCLK_RATIO_SR 384
	#define PCM_32BIT_MCLK_RATIO_SR 512

	static int aml_pcm_set_clk(struct aml_pcm *pcm, unsigned long rate)
	{
	int ret = 0;

	ret = clk_set_rate(pcm->clk_mpll, rate * 60);
	if (ret) {
	pr_info("Cannot set pcm mpll\n");
	return ret;
	}
	ret = clk_set_parent(pcm->clk_pcm_mclk, pcm->clk_mpll);
	if (ret) {
	pr_info("Cannot set pcm mclk parent\n");
	return ret;
	}

	ret = clk_set_rate(pcm->clk_pcm_mclk, rate);
	if (ret) {
	pr_info("Cannot set pcm mclk rate:%lu\n", rate);
	return ret;
	}

	return 0;
	}

	static int aml_pcm_dai_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	pr_debug("***Entered %s\n", __func__);
	return 0;
	}

	static void aml_pcm_dai_shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	pr_debug("***Entered %s\n", __func__);
	}

	static int aml_pcm_dai_prepare(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct aml_pcm_runtime_data *prtd = runtime->private_data;
	struct aml_pcm *pcm = snd_soc_dai_get_drvdata(dai);
	int mclk_rate, pcm_bit;

	pr_debug("***Entered %s\n", __func__);

	/* set bclk */
	if (runtime->format == SNDRV_PCM_FORMAT_S32_LE)
	pcm_bit = 32;
	else if (runtime->format == SNDRV_PCM_FORMAT_S24_LE)
	pcm_bit = 24;
	else
	pcm_bit = 16;

	mclk_rate = runtime->rate * pcm_bit * runtime->channels;
	pr_info("%s rate:%d, bits:%d, channels:%d, mclk:%d\n",
	__func__,
	runtime->rate,
	pcm_bit,
	runtime->channels,
	mclk_rate);

	aml_pcm_set_clk(pcm, mclk_rate);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	pr_info(
	"%s playback stream buffer start: %ld size: 0x%x\n",
	__func__, (long)prtd->buffer_start, prtd->buffer_size);
	pcm_out_set_buf(prtd->buffer_start, prtd->buffer_size);
	} else {
	pr_info(
	"%s capture stream buffer start: %ld size: 0x%x\n",
	__func__, (long)prtd->buffer_start, prtd->buffer_size);
	pcm_in_set_buf(prtd->buffer_start, prtd->buffer_size);
	}

	memset(runtime->dma_area, 0, runtime->dma_bytes);
	prtd->buffer_offset = 0;
	prtd->data_size = 0;
	prtd->period_elapsed = 0;

	return 0;
	}

	static int aml_pcm_dai_trigger(struct snd_pcm_substream *substream, int cmd,
	struct snd_soc_dai *dai)
	{
	struct aml_pcm *pcm_p = dev_get_drvdata(dai->dev);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	/* TODO */
	if (pcm_p && pcm_p->pcm_mode) {
	pr_info("aiu pcm master stream %d enable\n\n",
	substream->stream);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	pcm_master_out_enable(substream, 1);
	else
	pcm_master_in_enable(substream, 1);
	} else {
	pr_info("aiu slave pcm stream %d enable\n\n",
	substream->stream);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	pcm_out_enable(substream, 1);
	else
	pcm_in_enable(substream, 1);
	}
	break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	if (pcm_p && pcm_p->pcm_mode) {
	pr_info("aiu master pcm stream %d disable\n\n",
	substream->stream);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	pcm_master_out_enable(substream, 0);
	else
	pcm_master_in_enable(substream, 0);
	} else {
	pr_info("aiu slave pcm stream %d disable\n\n",
	substream->stream);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	pcm_out_enable(substream, 0);
	else
	pcm_in_enable(substream, 0);
	}
	break;
	default:
	return -EINVAL;
	}

	return 0;
	}

	static int aml_pcm_dai_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	pr_debug("***Entered %s:%s\n", __FILE__, __func__);
	return 0;
	}

	static int aml_pcm_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
	{
	pr_debug("***Entered %s\n", __func__);

	aml_set_pcm_format(fmt & SND_SOC_DAIFMT_FORMAT_MASK);

	return 0;
	}

	static int aml_pcm_dai_set_sysclk(struct snd_soc_dai *dai,
	int clk_id, unsigned int freq, int dir)
	{
	pr_debug("***Entered %s\n", __func__);
	return 0;
	}

	#ifdef CONFIG_PM
	static int aml_pcm_dai_suspend(struct snd_soc_dai *dai)
	{

	pr_debug("***Entered %s\n", __func__);
	return 0;
	}

	static int aml_pcm_dai_resume(struct snd_soc_dai *dai)
	{
	pr_debug("***Entered %s\n", __func__);
	return 0;
	}

	#else /* CONFIG_PM */
	#define aml_pcm_dai_suspend NULL
	#define aml_pcm_dai_resume NULL
	#endif /* CONFIG_PM */


	static struct snd_soc_dai_ops aml_pcm_dai_ops = {
	.startup = aml_pcm_dai_startup,
	.shutdown = aml_pcm_dai_shutdown,
	.prepare = aml_pcm_dai_prepare,
	.trigger = aml_pcm_dai_trigger,
	.hw_params = aml_pcm_dai_hw_params,
	.set_fmt = aml_pcm_dai_set_fmt,
	.set_sysclk = aml_pcm_dai_set_sysclk,
	};

	struct snd_soc_dai_driver aml_pcm_dai[] = {
	{
	.suspend = aml_pcm_dai_suspend,
	.resume = aml_pcm_dai_resume,
	.playback = {
	.channels_min = 1,
	.channels_max = 16,
	.rates = AML_DAI_PCM_RATES,
	.formats = AML_DAI_PCM_FORMATS,},
	.capture = {
	.channels_min = 1,
	.channels_max = 16,
	.rates = AML_DAI_PCM_RATES,
	.formats = AML_DAI_PCM_FORMATS,},
	.ops = &aml_pcm_dai_ops,
	},

	};
	EXPORT_SYMBOL_GPL(aml_pcm_dai);

	static const struct snd_soc_component_driver aml_component = {
	.name = DEV_NAME,
	};

	static int aml_pcm_dai_probe(struct platform_device *pdev)
	{
	struct pinctrl *pin_ctl;
	struct aml_pcm *pcm_p = NULL;
	int ret;

	pr_debug("enter %s\n", __func__);

	pin_ctl = devm_pinctrl_get_select(&pdev->dev, "audio_pcm");
	if (IS_ERR(pin_ctl)) {
	pin_ctl = NULL;
	pr_err("aml audio pcm dai pinmux set error!\n");
	}

	pcm_p = devm_kzalloc(&pdev->dev, sizeof(struct aml_pcm), GFP_KERNEL);
	if (!pcm_p) {
	/dev_err(&pdev->dev, "Can't allocate pcm_p\n");/
	ret = -ENOMEM;
	goto err;
	}
	dev_set_drvdata(&pdev->dev, pcm_p);

	/* is PCM master? */
	ret =
	of_property_read_u32((&pdev->dev)->of_node, "pcm_mode",
	&pcm_p->pcm_mode);

	pr_info("pcm mode detection =%d\n", pcm_p->pcm_mode);

	if (pcm_p->pcm_mode) {
	pcm_p->clk_mpll = devm_clk_get(&pdev->dev, "mpll0");
	if (IS_ERR(pcm_p->clk_mpll)) {
	dev_err(&pdev->dev, "Can't retrieve mpll0 clock\n");
	ret = PTR_ERR(pcm_p->clk_mpll);
	goto err;
	}

	pcm_p->clk_pcm_mclk = devm_clk_get(&pdev->dev, "pcm_mclk");
	if (IS_ERR(pcm_p->clk_pcm_mclk)) {
	dev_err(&pdev->dev, "Can't retrieve clk_pcm_mclk clock\n");
	ret = PTR_ERR(pcm_p->clk_pcm_mclk);
	goto err;
	}
	pcm_p->clk_pcm_sync = devm_clk_get(&pdev->dev, "pcm_sclk");
	if (IS_ERR(pcm_p->clk_pcm_sync)) {
	dev_err(&pdev->dev, "Can't retrieve clk_pcm_sync clock\n");
	ret = PTR_ERR(pcm_p->clk_pcm_sync);
	goto err;
	}

	/* Default 256fs */
	ret = aml_pcm_set_clk(pcm_p,
	PCM_DEFAULT_SAMPLERATE * PCM_DEFAULT_MCLK_RATIO_SR);
	if (ret < 0) {
	dev_err(&pdev->dev, "Can't set aml_pcm clk :%d\n", ret);
	goto err;
	}

	ret = clk_prepare_enable(pcm_p->clk_pcm_mclk);
	if (ret) {
	dev_err(&pdev->dev,
	"Can't enable pcm clk_pcm_mclk clock: %d\n", ret);
	goto err;
	}
	ret = clk_prepare_enable(pcm_p->clk_pcm_sync);
	if (ret) {
	dev_err(&pdev->dev,
	"Can't enable pcm clk_pcm_sync clock: %d\n", ret);
	goto err;
	}
	}

	ret = snd_soc_register_component(&pdev->dev, &aml_component,
	aml_pcm_dai, ARRAY_SIZE(aml_pcm_dai));

	err:
	return ret;

	}

	static int aml_pcm_dai_remove(struct platform_device *pdev)
	{
	struct aml_pcm *pcm_priv = dev_get_drvdata(&pdev->dev);

	clk_disable_unprepare(pcm_priv->clk_pcm_mclk);
	clk_disable_unprepare(pcm_priv->clk_pcm_sync);

	snd_soc_unregister_component(&pdev->dev);
	return 0;
	}

	static void aml_pcm_dai_plat_shutdown(struct platform_device *pdev)
	{
	struct aml_pcm *pcm_priv = dev_get_drvdata(&pdev->dev);

	clk_disable_unprepare(pcm_priv->clk_pcm_mclk);
	clk_disable_unprepare(pcm_priv->clk_pcm_sync);

	snd_soc_unregister_component(&pdev->dev);
	}

	#ifdef CONFIG_OF
	static const struct of_device_id amlogic_pcm_dai_match[] = {
	{.compatible = "amlogic, aml-pcm-dai",
	},
	{},
	};
	#else
	#define amlogic_pcm_dai_match NULL
	#endif

	static struct platform_driver aml_pcm_dai_driver = {
	.driver = {
	.name = DEV_NAME,
	.owner = THIS_MODULE,
	.of_match_table = amlogic_pcm_dai_match,
	},

	.probe = aml_pcm_dai_probe,
	.remove = aml_pcm_dai_remove,
	.shutdown = aml_pcm_dai_plat_shutdown,
	};

	static int __init aml_pcm_dai_modinit(void)
	{
	return platform_driver_register(&aml_pcm_dai_driver);
	}

	module_init(aml_pcm_dai_modinit);

	static void __exit aml_pcm_dai_modexit(void)
	{
	platform_driver_unregister(&aml_pcm_dai_driver);
	}

	module_exit(aml_pcm_dai_modexit);

	/* Module information */
	MODULE_AUTHOR("AMLogic, Inc.");
	MODULE_DESCRIPTION("AML DAI driver for ALSA");
	MODULE_LICENSE("GPL");