sound/soc/hisilicon/hi3660-i2s.c - SHIFTPHONES/kernel/common - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * linux/sound/soc/hisilicon/hi3660-i2s.c
  *
  * I2S IP driver for hi3660.
  *
  * Copyright (c) 2001-2021, Huawei Tech. Co., Ltd.
  */
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/delay.h>
 #include <linux/clk.h>
 #include <linux/jiffies.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/dmaengine_pcm.h>
 #include <sound/initval.h>
 #include <sound/soc.h>
 #include <linux/interrupt.h>
 #include <linux/reset.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/reset-controller.h>
 #include <linux/clk.h>
 #include <linux/regulator/consumer.h>

 #include "hi3660-i2s.h"

 struct hi3660_i2s {
 	struct device *dev;
 	struct reset_control *rc;
 	int clocks;
 	struct regulator *regu_asp;
 	struct pinctrl *pctrl;
 	struct pinctrl_state *pin_default;
 	struct pinctrl_state *pin_idle;
 	struct clk *asp_subsys_clk;
 	struct snd_soc_dai_driver dai;
 	void __iomem *base;
 	void __iomem *base_syscon;
 	phys_addr_t base_phys;
 	struct snd_dmaengine_dai_dma_data dma_data[2];
 	spinlock_t lock;
 	int rate;
 	int format;
 	int bits;
 	int channels;
 	u32 master;
 	u32 status;
 };

 static void update_bits(struct hi3660_i2s *i2s, u32 ofs, u32 reset, u32 set)
 {
 	u32 val = readl(i2s->base + ofs) & ~reset;

 	writel(val | set, i2s->base + ofs);
 }

 static void update_bits_syscon(struct hi3660_i2s *i2s,
 			u32 ofs, u32 reset, u32 set)
 {
 	u32 val = readl(i2s->base_syscon + ofs) & ~reset;

 	writel(val | set, i2s->base_syscon + ofs);
 }

 static int enable_format(struct hi3660_i2s *i2s,
 			       struct snd_pcm_substream *substream)
 {
 	switch (i2s->format & SND_SOC_DAIFMT_MASTER_MASK) {
 	case SND_SOC_DAIFMT_CBM_CFM:
 		i2s->master = false;
 		update_bits_syscon(i2s, HI_ASP_CFG_R_CLK_SEL_REG,
 				0, HI_ASP_CFG_R_CLK_SEL_EN);
 		break;
 	case SND_SOC_DAIFMT_CBS_CFS:
 		i2s->master = true;
 		update_bits_syscon(i2s, HI_ASP_CFG_R_CLK_SEL_REG,
 				HI_ASP_CFG_R_CLK_SEL_EN, 0);
 		break;
 	default:
 		return -EINVAL;
 	}

 	return 0;
 }

 static int startup(struct snd_pcm_substream *substream,
 		     struct snd_soc_dai *cpu_dai)
 {
 	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);

 	/* deassert reset on sio_bt*/
 	update_bits_syscon(i2s, HI_ASP_CFG_R_RST_CTRLDIS_REG,
 			0, BIT(2)|BIT(6)|BIT(8)|BIT(16));

 	/* enable clk before frequency division */
 	update_bits_syscon(i2s, HI_ASP_CFG_R_GATE_EN_REG,
 			0, BIT(5)|BIT(6));

 	/* enable frequency division */
 	update_bits_syscon(i2s, HI_ASP_CFG_R_GATE_CLKDIV_EN_REG,
 			0, BIT(2)|BIT(5));

 	/* select clk */
 	update_bits_syscon(i2s, HI_ASP_CFG_R_CLK_SEL_REG,
 			HI_ASP_MASK, HI_ASP_CFG_R_CLK_SEL);

 	/* select clk_div */
 	update_bits_syscon(i2s, HI_ASP_CFG_R_CLK1_DIV_REG,
 			HI_ASP_MASK, HI_ASP_CFG_R_CLK1_DIV_SEL);
 	update_bits_syscon(i2s, HI_ASP_CFG_R_CLK4_DIV_REG,
 			HI_ASP_MASK, HI_ASP_CFG_R_CLK4_DIV_SEL);
 	update_bits_syscon(i2s, HI_ASP_CFG_R_CLK6_DIV_REG,
 			HI_ASP_MASK, HI_ASP_CFG_R_CLK6_DIV_SEL);

 	/* sio config */
 	update_bits(i2s, HI_ASP_SIO_MODE_REG, HI_ASP_MASK, 0x0);
 	update_bits(i2s, HI_ASP_SIO_DATA_WIDTH_SET_REG, HI_ASP_MASK, 0x9);
 	update_bits(i2s, HI_ASP_SIO_I2S_POS_MERGE_EN_REG, HI_ASP_MASK, 0x1);
 	update_bits(i2s, HI_ASP_SIO_I2S_START_POS_REG, HI_ASP_MASK, 0x0);

 	return 0;
 }

 static void shutdown(struct snd_pcm_substream *substream,
 		       struct snd_soc_dai *cpu_dai)
 {
 	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);

 	if (!IS_ERR_OR_NULL(i2s->asp_subsys_clk))
 		clk_disable_unprepare(i2s->asp_subsys_clk);
 }

 static void txctrl(struct snd_soc_dai *cpu_dai, int on)
 {
 	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);

 	spin_lock(&i2s->lock);

 	if (on) {
 		/* enable SIO TX */
 		update_bits(i2s, HI_ASP_SIO_CT_SET_REG, 0,
 			HI_ASP_SIO_TX_ENABLE |
 			HI_ASP_SIO_TX_DATA_MERGE |
 			HI_ASP_SIO_TX_FIFO_THRESHOLD |
 			HI_ASP_SIO_RX_ENABLE |
 			HI_ASP_SIO_RX_DATA_MERGE |
 			HI_ASP_SIO_RX_FIFO_THRESHOLD);
 	} else {
 		/* disable SIO TX */
 		update_bits(i2s, HI_ASP_SIO_CT_CLR_REG, 0,
 			HI_ASP_SIO_TX_ENABLE | HI_ASP_SIO_RX_ENABLE);
 	}
 	spin_unlock(&i2s->lock);
 }

 static void rxctrl(struct snd_soc_dai *cpu_dai, int on)
 {
 	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);

 	spin_lock(&i2s->lock);
 	if (on)
 		/* enable SIO RX */
 		update_bits(i2s, HI_ASP_SIO_CT_SET_REG, 0,
 			HI_ASP_SIO_TX_ENABLE |
 			HI_ASP_SIO_TX_DATA_MERGE |
 			HI_ASP_SIO_TX_FIFO_THRESHOLD |
 			HI_ASP_SIO_RX_ENABLE |
 			HI_ASP_SIO_RX_DATA_MERGE |
 			HI_ASP_SIO_RX_FIFO_THRESHOLD);
 	else
 		/* disable SIO RX */
 		update_bits(i2s, HI_ASP_SIO_CT_CLR_REG, 0,
 			HI_ASP_SIO_TX_ENABLE | HI_ASP_SIO_RX_ENABLE);
 	spin_unlock(&i2s->lock);
 }

 static int set_sysclk(struct snd_soc_dai *cpu_dai,
 			     int clk_id, unsigned int freq, int dir)
 {
 	return 0;
 }

 static int set_format(struct snd_soc_dai *cpu_dai, unsigned int fmt)
 {
 	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);

 	i2s->format = fmt;
 	i2s->master = (i2s->format & SND_SOC_DAIFMT_MASTER_MASK) ==
 		      SND_SOC_DAIFMT_CBS_CFS;

 	return 0;
 }

 static int hw_params(struct snd_pcm_substream *substream,
 			    struct snd_pcm_hw_params *params,
 			    struct snd_soc_dai *cpu_dai)
 {
 	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
 	struct snd_dmaengine_dai_dma_data *dma_data;

 	dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);

 	enable_format(i2s, substream);

 	dma_data->maxburst = 4;

 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		dma_data->addr = i2s->base_phys +
 			HI_ASP_SIO_I2S_DUAL_TX_CHN_REG;
 	else
 		dma_data->addr = i2s->base_phys +
 			HI_ASP_SIO_I2S_DUAL_RX_CHN_REG;

 	switch (params_format(params)) {
 	case SNDRV_PCM_FORMAT_U16_LE:
 	case SNDRV_PCM_FORMAT_S16_LE:
 		i2s->bits = 16;
 		dma_data->addr_width = 4;
 		break;

 	case SNDRV_PCM_FORMAT_U24_LE:
 	case SNDRV_PCM_FORMAT_S24_LE:
 		i2s->bits = 32;
 		dma_data->addr_width = 4;
 		break;
 	default:
 		dev_err(cpu_dai->dev, "Bad format\n");
 		return -EINVAL;
 	}

 	return 0;
 }

 static int trigger(struct snd_pcm_substream *substream, int cmd,
 			  struct snd_soc_dai *cpu_dai)
 {
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 			rxctrl(cpu_dai, 1);
 		else
 			txctrl(cpu_dai, 1);
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 			rxctrl(cpu_dai, 0);
 		else
 			txctrl(cpu_dai, 0);
 		break;
 	default:
 		dev_err(cpu_dai->dev, "unknown cmd\n");
 		return -EINVAL;
 	}

 	return 0;
 }

 static int dai_probe(struct snd_soc_dai *dai)
 {
 	struct hi3660_i2s *i2s = snd_soc_dai_get_drvdata(dai);

 	snd_soc_dai_init_dma_data(dai,
 		&i2s->dma_data[SNDRV_PCM_STREAM_PLAYBACK],
 		&i2s->dma_data[SNDRV_PCM_STREAM_CAPTURE]);

 	return 0;
 }


 static struct snd_soc_dai_ops dai_ops = {
 	.trigger	= trigger,
 	.hw_params	= hw_params,
 	.set_fmt	= set_format,
 	.set_sysclk	= set_sysclk,
 	.startup	= startup,
 	.shutdown	= shutdown,
 };

 static struct snd_soc_dai_driver dai_init = {
 	.name = "hi3660_i2s",
 	.probe = dai_probe,
 	.playback = {
 		.channels_min = 2,
 		.channels_max = 2,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE |
 			   SNDRV_PCM_FMTBIT_U16_LE,
 		.rates = SNDRV_PCM_RATE_48000,
 	},
 	.capture = {
 		.channels_min = 2,
 		.channels_max = 2,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE |
 			   SNDRV_PCM_FMTBIT_U16_LE,
 		.rates = SNDRV_PCM_RATE_48000,
 	},
 	.ops = &dai_ops,
 };

 static const struct snd_soc_component_driver component_driver = {
 	.name = "hi3660_i2s",
 };

 #include <sound/dmaengine_pcm.h>

 static const struct snd_pcm_hardware sound_hardware = {
 	.info = SNDRV_PCM_INFO_MMAP |
 		SNDRV_PCM_INFO_MMAP_VALID |
 		SNDRV_PCM_INFO_PAUSE |
 		SNDRV_PCM_INFO_RESUME |
 		SNDRV_PCM_INFO_INTERLEAVED |
 		SNDRV_PCM_INFO_HALF_DUPLEX,
 	.period_bytes_min = 4096,
 	.period_bytes_max = 4096,
 	.periods_min = 4,
 	.periods_max = UINT_MAX,
 	.buffer_bytes_max = SIZE_MAX,
 };

 static const struct snd_dmaengine_pcm_config dmaengine_pcm_config = {
 	.pcm_hardware = &sound_hardware,
 	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
 	.prealloc_buffer_size = 64 * 1024,
 };

 static int hi3660_i2s_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct hi3660_i2s *i2s;
 	struct resource *res;
 	int ret;

 	i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);
 	if (!i2s)
 		return -ENOMEM;

 	i2s->dev = dev;
 	spin_lock_init(&i2s->lock);

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		ret = -ENODEV;
 		return ret;
 	}
 	i2s->base_phys = (phys_addr_t)res->start;

 	i2s->dai = dai_init;
 	dev_set_drvdata(&pdev->dev, i2s);

 	i2s->base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(i2s->base)) {
 		dev_err(&pdev->dev, "ioremap failed\n");
 		ret = PTR_ERR(i2s->base);
 		return ret;
 	}

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	if (!res) {
 		ret = -ENODEV;
 		return ret;
 	}
 	i2s->base_syscon = devm_ioremap(dev, res->start, resource_size(res));
 	if (IS_ERR(i2s->base_syscon)) {
 		dev_err(&pdev->dev, "ioremap failed\n");
 		ret = PTR_ERR(i2s->base_syscon);
 		return ret;
 	}

 	/* i2s iomux config */
 	i2s->pctrl = devm_pinctrl_get(dev);
 	if (IS_ERR(i2s->pctrl)) {
 		dev_err(dev, "could not get pinctrl\n");
 		ret = -EIO;
 		return ret;
 	}

 	i2s->pin_default = pinctrl_lookup_state(i2s->pctrl,
 					PINCTRL_STATE_DEFAULT);
 	if (IS_ERR(i2s->pin_default)) {
 		dev_err(dev,
 			"could not get default state (%li)\n",
 			PTR_ERR(i2s->pin_default));
 		ret = -EIO;
 		return ret;
 	}

 	if (pinctrl_select_state(i2s->pctrl, i2s->pin_default)) {
 		dev_err(dev, "could not set pins to default state\n");
 		ret = -EIO;
 		return ret;
 	}

 	ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
 				&dmaengine_pcm_config, 0);
 	if (ret)
 		return ret;

 	ret = snd_soc_register_component(&pdev->dev, &component_driver,
 				&i2s->dai, 1);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to register dai\n");
 		return ret;
 	}

 	return 0;
 }

 static int hi3660_i2s_remove(struct platform_device *pdev)
 {
 	struct hi3660_i2s *i2s = dev_get_drvdata(&pdev->dev);

 	snd_soc_unregister_component(&pdev->dev);
 	dev_set_drvdata(&pdev->dev, NULL);

 	pinctrl_put(i2s->pctrl);

 	return 0;
 }

 static const struct of_device_id dt_ids[] = {
 	{ .compatible = "hisilicon,hi3660-i2s-1.0" },
 	{ /* sentinel */ }
 };

 MODULE_DEVICE_TABLE(of, dt_ids);

 static struct platform_driver local_platform_driver = {
 	.probe = hi3660_i2s_probe,
 	.remove = hi3660_i2s_remove,
 	.driver = {
 		.name = "hi3660_i2s",
 		.owner = THIS_MODULE,
 		.of_match_table = dt_ids,
 	},
 };

 module_platform_driver(local_platform_driver);

 MODULE_DESCRIPTION("Hisilicon I2S driver");
 MODULE_AUTHOR("Guangke Ji <j00209069@notesmail.huawei.com>");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* linux/sound/soc/hisilicon/hi3660-i2s.c
	*
	* I2S IP driver for hi3660.
	*
	* Copyright (c) 2001-2021, Huawei Tech. Co., Ltd.
	*/
	#include <linux/init.h>
	#include <linux/module.h>
	#include <linux/device.h>
	#include <linux/delay.h>
	#include <linux/clk.h>
	#include <linux/jiffies.h>
	#include <linux/io.h>
	#include <linux/gpio.h>
	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/pcm_params.h>
	#include <sound/dmaengine_pcm.h>
	#include <sound/initval.h>
	#include <sound/soc.h>
	#include <linux/interrupt.h>
	#include <linux/reset.h>
	#include <linux/of_address.h>
	#include <linux/of_irq.h>
	#include <linux/reset-controller.h>
	#include <linux/clk.h>
	#include <linux/regulator/consumer.h>

	#include "hi3660-i2s.h"

	struct hi3660_i2s {
	struct device *dev;
	struct reset_control *rc;
	int clocks;
	struct regulator *regu_asp;
	struct pinctrl *pctrl;
	struct pinctrl_state *pin_default;
	struct pinctrl_state *pin_idle;
	struct clk *asp_subsys_clk;
	struct snd_soc_dai_driver dai;
	void __iomem *base;
	void __iomem *base_syscon;
	phys_addr_t base_phys;
	struct snd_dmaengine_dai_dma_data dma_data[2];
	spinlock_t lock;
	int rate;
	int format;
	int bits;
	int channels;
	u32 master;
	u32 status;
	};

	static void update_bits(struct hi3660_i2s *i2s, u32 ofs, u32 reset, u32 set)
	{
	u32 val = readl(i2s->base + ofs) & ~reset;

	writel(val \| set, i2s->base + ofs);
	}

	static void update_bits_syscon(struct hi3660_i2s *i2s,
	u32 ofs, u32 reset, u32 set)
	{
	u32 val = readl(i2s->base_syscon + ofs) & ~reset;

	writel(val \| set, i2s->base_syscon + ofs);
	}

	static int enable_format(struct hi3660_i2s *i2s,
	struct snd_pcm_substream *substream)
	{
	switch (i2s->format & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
	i2s->master = false;
	update_bits_syscon(i2s, HI_ASP_CFG_R_CLK_SEL_REG,
	0, HI_ASP_CFG_R_CLK_SEL_EN);
	break;
	case SND_SOC_DAIFMT_CBS_CFS:
	i2s->master = true;
	update_bits_syscon(i2s, HI_ASP_CFG_R_CLK_SEL_REG,
	HI_ASP_CFG_R_CLK_SEL_EN, 0);
	break;
	default:
	return -EINVAL;
	}

	return 0;
	}

	static int startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *cpu_dai)
	{
	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);

	/* deassert reset on sio_bt*/
	update_bits_syscon(i2s, HI_ASP_CFG_R_RST_CTRLDIS_REG,
	0, BIT(2)\|BIT(6)\|BIT(8)\|BIT(16));

	/* enable clk before frequency division */
	update_bits_syscon(i2s, HI_ASP_CFG_R_GATE_EN_REG,
	0, BIT(5)\|BIT(6));

	/* enable frequency division */
	update_bits_syscon(i2s, HI_ASP_CFG_R_GATE_CLKDIV_EN_REG,
	0, BIT(2)\|BIT(5));

	/* select clk */
	update_bits_syscon(i2s, HI_ASP_CFG_R_CLK_SEL_REG,
	HI_ASP_MASK, HI_ASP_CFG_R_CLK_SEL);

	/* select clk_div */
	update_bits_syscon(i2s, HI_ASP_CFG_R_CLK1_DIV_REG,
	HI_ASP_MASK, HI_ASP_CFG_R_CLK1_DIV_SEL);
	update_bits_syscon(i2s, HI_ASP_CFG_R_CLK4_DIV_REG,
	HI_ASP_MASK, HI_ASP_CFG_R_CLK4_DIV_SEL);
	update_bits_syscon(i2s, HI_ASP_CFG_R_CLK6_DIV_REG,
	HI_ASP_MASK, HI_ASP_CFG_R_CLK6_DIV_SEL);

	/* sio config */
	update_bits(i2s, HI_ASP_SIO_MODE_REG, HI_ASP_MASK, 0x0);
	update_bits(i2s, HI_ASP_SIO_DATA_WIDTH_SET_REG, HI_ASP_MASK, 0x9);
	update_bits(i2s, HI_ASP_SIO_I2S_POS_MERGE_EN_REG, HI_ASP_MASK, 0x1);
	update_bits(i2s, HI_ASP_SIO_I2S_START_POS_REG, HI_ASP_MASK, 0x0);

	return 0;
	}

	static void shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *cpu_dai)
	{
	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);

	if (!IS_ERR_OR_NULL(i2s->asp_subsys_clk))
	clk_disable_unprepare(i2s->asp_subsys_clk);
	}

	static void txctrl(struct snd_soc_dai *cpu_dai, int on)
	{
	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);

	spin_lock(&i2s->lock);

	if (on) {
	/* enable SIO TX */
	update_bits(i2s, HI_ASP_SIO_CT_SET_REG, 0,
	HI_ASP_SIO_TX_ENABLE \|
	HI_ASP_SIO_TX_DATA_MERGE \|
	HI_ASP_SIO_TX_FIFO_THRESHOLD \|
	HI_ASP_SIO_RX_ENABLE \|
	HI_ASP_SIO_RX_DATA_MERGE \|
	HI_ASP_SIO_RX_FIFO_THRESHOLD);
	} else {
	/* disable SIO TX */
	update_bits(i2s, HI_ASP_SIO_CT_CLR_REG, 0,
	HI_ASP_SIO_TX_ENABLE \| HI_ASP_SIO_RX_ENABLE);
	}
	spin_unlock(&i2s->lock);
	}

	static void rxctrl(struct snd_soc_dai *cpu_dai, int on)
	{
	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);

	spin_lock(&i2s->lock);
	if (on)
	/* enable SIO RX */
	update_bits(i2s, HI_ASP_SIO_CT_SET_REG, 0,
	HI_ASP_SIO_TX_ENABLE \|
	HI_ASP_SIO_TX_DATA_MERGE \|
	HI_ASP_SIO_TX_FIFO_THRESHOLD \|
	HI_ASP_SIO_RX_ENABLE \|
	HI_ASP_SIO_RX_DATA_MERGE \|
	HI_ASP_SIO_RX_FIFO_THRESHOLD);
	else
	/* disable SIO RX */
	update_bits(i2s, HI_ASP_SIO_CT_CLR_REG, 0,
	HI_ASP_SIO_TX_ENABLE \| HI_ASP_SIO_RX_ENABLE);
	spin_unlock(&i2s->lock);
	}

	static int set_sysclk(struct snd_soc_dai *cpu_dai,
	int clk_id, unsigned int freq, int dir)
	{
	return 0;
	}

	static int set_format(struct snd_soc_dai *cpu_dai, unsigned int fmt)
	{
	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);

	i2s->format = fmt;
	i2s->master = (i2s->format & SND_SOC_DAIFMT_MASTER_MASK) ==
	SND_SOC_DAIFMT_CBS_CFS;

	return 0;
	}

	static int hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *cpu_dai)
	{
	struct hi3660_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
	struct snd_dmaengine_dai_dma_data *dma_data;

	dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);

	enable_format(i2s, substream);

	dma_data->maxburst = 4;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	dma_data->addr = i2s->base_phys +
	HI_ASP_SIO_I2S_DUAL_TX_CHN_REG;
	else
	dma_data->addr = i2s->base_phys +
	HI_ASP_SIO_I2S_DUAL_RX_CHN_REG;

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_U16_LE:
	case SNDRV_PCM_FORMAT_S16_LE:
	i2s->bits = 16;
	dma_data->addr_width = 4;
	break;

	case SNDRV_PCM_FORMAT_U24_LE:
	case SNDRV_PCM_FORMAT_S24_LE:
	i2s->bits = 32;
	dma_data->addr_width = 4;
	break;
	default:
	dev_err(cpu_dai->dev, "Bad format\n");
	return -EINVAL;
	}

	return 0;
	}

	static int trigger(struct snd_pcm_substream *substream, int cmd,
	struct snd_soc_dai *cpu_dai)
	{
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
	rxctrl(cpu_dai, 1);
	else
	txctrl(cpu_dai, 1);
	break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
	rxctrl(cpu_dai, 0);
	else
	txctrl(cpu_dai, 0);
	break;
	default:
	dev_err(cpu_dai->dev, "unknown cmd\n");
	return -EINVAL;
	}

	return 0;
	}

	static int dai_probe(struct snd_soc_dai *dai)
	{
	struct hi3660_i2s *i2s = snd_soc_dai_get_drvdata(dai);

	snd_soc_dai_init_dma_data(dai,
	&i2s->dma_data[SNDRV_PCM_STREAM_PLAYBACK],
	&i2s->dma_data[SNDRV_PCM_STREAM_CAPTURE]);

	return 0;
	}


	static struct snd_soc_dai_ops dai_ops = {
	.trigger = trigger,
	.hw_params = hw_params,
	.set_fmt = set_format,
	.set_sysclk = set_sysclk,
	.startup = startup,
	.shutdown = shutdown,
	};

	static struct snd_soc_dai_driver dai_init = {
	.name = "hi3660_i2s",
	.probe = dai_probe,
	.playback = {
	.channels_min = 2,
	.channels_max = 2,
	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
	SNDRV_PCM_FMTBIT_U16_LE,
	.rates = SNDRV_PCM_RATE_48000,
	},
	.capture = {
	.channels_min = 2,
	.channels_max = 2,
	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
	SNDRV_PCM_FMTBIT_U16_LE,
	.rates = SNDRV_PCM_RATE_48000,
	},
	.ops = &dai_ops,
	};

	static const struct snd_soc_component_driver component_driver = {
	.name = "hi3660_i2s",
	};

	#include <sound/dmaengine_pcm.h>

	static const struct snd_pcm_hardware sound_hardware = {
	.info = SNDRV_PCM_INFO_MMAP \|
	SNDRV_PCM_INFO_MMAP_VALID \|
	SNDRV_PCM_INFO_PAUSE \|
	SNDRV_PCM_INFO_RESUME \|
	SNDRV_PCM_INFO_INTERLEAVED \|
	SNDRV_PCM_INFO_HALF_DUPLEX,
	.period_bytes_min = 4096,
	.period_bytes_max = 4096,
	.periods_min = 4,
	.periods_max = UINT_MAX,
	.buffer_bytes_max = SIZE_MAX,
	};

	static const struct snd_dmaengine_pcm_config dmaengine_pcm_config = {
	.pcm_hardware = &sound_hardware,
	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
	.prealloc_buffer_size = 64 * 1024,
	};

	static int hi3660_i2s_probe(struct platform_device *pdev)
	{
	struct device *dev = &pdev->dev;
	struct hi3660_i2s *i2s;
	struct resource *res;
	int ret;

	i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);
	if (!i2s)
	return -ENOMEM;

	i2s->dev = dev;
	spin_lock_init(&i2s->lock);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
	ret = -ENODEV;
	return ret;
	}
	i2s->base_phys = (phys_addr_t)res->start;

	i2s->dai = dai_init;
	dev_set_drvdata(&pdev->dev, i2s);

	i2s->base = devm_ioremap_resource(dev, res);
	if (IS_ERR(i2s->base)) {
	dev_err(&pdev->dev, "ioremap failed\n");
	ret = PTR_ERR(i2s->base);
	return ret;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (!res) {
	ret = -ENODEV;
	return ret;
	}
	i2s->base_syscon = devm_ioremap(dev, res->start, resource_size(res));
	if (IS_ERR(i2s->base_syscon)) {
	dev_err(&pdev->dev, "ioremap failed\n");
	ret = PTR_ERR(i2s->base_syscon);
	return ret;
	}

	/* i2s iomux config */
	i2s->pctrl = devm_pinctrl_get(dev);
	if (IS_ERR(i2s->pctrl)) {
	dev_err(dev, "could not get pinctrl\n");
	ret = -EIO;
	return ret;
	}

	i2s->pin_default = pinctrl_lookup_state(i2s->pctrl,
	PINCTRL_STATE_DEFAULT);
	if (IS_ERR(i2s->pin_default)) {
	dev_err(dev,
	"could not get default state (%li)\n",
	PTR_ERR(i2s->pin_default));
	ret = -EIO;
	return ret;
	}

	if (pinctrl_select_state(i2s->pctrl, i2s->pin_default)) {
	dev_err(dev, "could not set pins to default state\n");
	ret = -EIO;
	return ret;
	}

	ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
	&dmaengine_pcm_config, 0);
	if (ret)
	return ret;

	ret = snd_soc_register_component(&pdev->dev, &component_driver,
	&i2s->dai, 1);
	if (ret) {
	dev_err(&pdev->dev, "Failed to register dai\n");
	return ret;
	}

	return 0;
	}

	static int hi3660_i2s_remove(struct platform_device *pdev)
	{
	struct hi3660_i2s *i2s = dev_get_drvdata(&pdev->dev);

	snd_soc_unregister_component(&pdev->dev);
	dev_set_drvdata(&pdev->dev, NULL);

	pinctrl_put(i2s->pctrl);

	return 0;
	}

	static const struct of_device_id dt_ids[] = {
	{ .compatible = "hisilicon,hi3660-i2s-1.0" },
	{ /* sentinel */ }
	};

	MODULE_DEVICE_TABLE(of, dt_ids);

	static struct platform_driver local_platform_driver = {
	.probe = hi3660_i2s_probe,
	.remove = hi3660_i2s_remove,
	.driver = {
	.name = "hi3660_i2s",
	.owner = THIS_MODULE,
	.of_match_table = dt_ids,
	},
	};

	module_platform_driver(local_platform_driver);

	MODULE_DESCRIPTION("Hisilicon I2S driver");
	MODULE_AUTHOR("Guangke Ji <j00209069@notesmail.huawei.com>");
	MODULE_LICENSE("GPL");