sound/soc/bcm/bcm63xx-i2s-whistler.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 // linux/sound/bcm/bcm63xx-i2s-whistler.c
 // BCM63xx whistler i2s driver
 // Copyright (c) 2020 Broadcom Corporation
 // Author: Kevin-Ke Li <kevin-ke.li@broadcom.com>

 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/regmap.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include "bcm63xx-i2s.h"

 #define DRV_NAME "brcm-i2s"

 static bool brcm_i2s_wr_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case I2S_TX_CFG ... I2S_TX_DESC_IFF_LEN:
 	case I2S_TX_CFG_2 ... I2S_RX_DESC_IFF_LEN:
 	case I2S_RX_CFG_2 ... I2S_REG_MAX:
 		return true;
 	default:
 		return false;
 	}
 }

 static bool brcm_i2s_rd_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case I2S_TX_CFG ... I2S_REG_MAX:
 		return true;
 	default:
 		return false;
 	}
 }

 static bool brcm_i2s_volatile_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
 	case I2S_TX_CFG:
 	case I2S_TX_IRQ_CTL:
 	case I2S_TX_DESC_IFF_ADDR:
 	case I2S_TX_DESC_IFF_LEN:
 	case I2S_TX_DESC_OFF_ADDR:
 	case I2S_TX_DESC_OFF_LEN:
 	case I2S_TX_CFG_2:
 	case I2S_RX_CFG:
 	case I2S_RX_IRQ_CTL:
 	case I2S_RX_DESC_OFF_ADDR:
 	case I2S_RX_DESC_OFF_LEN:
 	case I2S_RX_DESC_IFF_LEN:
 	case I2S_RX_DESC_IFF_ADDR:
 	case I2S_RX_CFG_2:
 		return true;
 	default:
 		return false;
 	}
 }

 static const struct regmap_config brcm_i2s_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,
 	.max_register = I2S_REG_MAX,
 	.writeable_reg = brcm_i2s_wr_reg,
 	.readable_reg = brcm_i2s_rd_reg,
 	.volatile_reg = brcm_i2s_volatile_reg,
 	.cache_type = REGCACHE_FLAT,
 };

 static int bcm63xx_i2s_hw_params(struct snd_pcm_substream *substream,
 				 struct snd_pcm_hw_params *params,
 				 struct snd_soc_dai *dai)
 {
 	int ret = 0;
 	struct bcm_i2s_priv *i2s_priv = snd_soc_dai_get_drvdata(dai);

 	ret = clk_set_rate(i2s_priv->i2s_clk, params_rate(params));
 	if (ret < 0)
 		dev_err(i2s_priv->dev,
 			"Can't set sample rate, err: %d\n", ret);

 	return ret;
 }

 static int bcm63xx_i2s_startup(struct snd_pcm_substream *substream,
 			       struct snd_soc_dai *dai)
 {
 	unsigned int slavemode;
 	struct bcm_i2s_priv *i2s_priv = snd_soc_dai_get_drvdata(dai);
 	struct regmap *regmap_i2s = i2s_priv->regmap_i2s;

 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		regmap_update_bits(regmap_i2s, I2S_TX_CFG,
 				   I2S_TX_OUT_R | I2S_TX_DATA_ALIGNMENT |
 				   I2S_TX_DATA_ENABLE | I2S_TX_CLOCK_ENABLE,
 				   I2S_TX_OUT_R | I2S_TX_DATA_ALIGNMENT |
 				   I2S_TX_DATA_ENABLE | I2S_TX_CLOCK_ENABLE);
 		regmap_write(regmap_i2s, I2S_TX_IRQ_CTL, 0);
 		regmap_write(regmap_i2s, I2S_TX_IRQ_IFF_THLD, 0);
 		regmap_write(regmap_i2s, I2S_TX_IRQ_OFF_THLD, 1);

 		/* TX and RX block each have an independent bit to indicate
 		 * if it is generating the clock for the I2S bus. The bus
 		 * clocks need to be generated from either the TX or RX block,
 		 * but not both
 		 */
 		regmap_read(regmap_i2s, I2S_RX_CFG_2, &slavemode);
 		if (slavemode & I2S_RX_SLAVE_MODE_MASK)
 			regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
 					   I2S_TX_SLAVE_MODE_MASK,
 					   I2S_TX_MASTER_MODE);
 		else
 			regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
 					   I2S_TX_SLAVE_MODE_MASK,
 					   I2S_TX_SLAVE_MODE);
 	} else {
 		regmap_update_bits(regmap_i2s, I2S_RX_CFG,
 				   I2S_RX_IN_R | I2S_RX_DATA_ALIGNMENT |
 				   I2S_RX_CLOCK_ENABLE,
 				   I2S_RX_IN_R | I2S_RX_DATA_ALIGNMENT |
 				   I2S_RX_CLOCK_ENABLE);
 		regmap_write(regmap_i2s, I2S_RX_IRQ_CTL, 0);
 		regmap_write(regmap_i2s, I2S_RX_IRQ_IFF_THLD, 0);
 		regmap_write(regmap_i2s, I2S_RX_IRQ_OFF_THLD, 1);

 		regmap_read(regmap_i2s, I2S_TX_CFG_2, &slavemode);
 		if (slavemode & I2S_TX_SLAVE_MODE_MASK)
 			regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
 					   I2S_RX_SLAVE_MODE_MASK, 0);
 		else
 			regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
 					   I2S_RX_SLAVE_MODE_MASK,
 					   I2S_RX_SLAVE_MODE);
 	}
 	return 0;
 }

 static void bcm63xx_i2s_shutdown(struct snd_pcm_substream *substream,
 				struct snd_soc_dai *dai)
 {
 	unsigned int enabled, slavemode;
 	struct bcm_i2s_priv *i2s_priv = snd_soc_dai_get_drvdata(dai);
 	struct regmap *regmap_i2s = i2s_priv->regmap_i2s;

 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		regmap_update_bits(regmap_i2s, I2S_TX_CFG,
 				   I2S_TX_OUT_R | I2S_TX_DATA_ALIGNMENT |
 				   I2S_TX_DATA_ENABLE | I2S_TX_CLOCK_ENABLE, 0);
 		regmap_write(regmap_i2s, I2S_TX_IRQ_CTL, 1);
 		regmap_write(regmap_i2s, I2S_TX_IRQ_IFF_THLD, 4);
 		regmap_write(regmap_i2s, I2S_TX_IRQ_OFF_THLD, 4);

 		regmap_read(regmap_i2s, I2S_TX_CFG_2, &slavemode);
 		slavemode = slavemode & I2S_TX_SLAVE_MODE_MASK;
 		if (!slavemode) {
 			regmap_read(regmap_i2s, I2S_RX_CFG, &enabled);
 			enabled = enabled & I2S_RX_ENABLE_MASK;
 			if (enabled)
 				regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
 						   I2S_RX_SLAVE_MODE_MASK,
 						   I2S_RX_MASTER_MODE);
 		}
 		regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
 				   I2S_TX_SLAVE_MODE_MASK,
 				   I2S_TX_SLAVE_MODE);
 	} else {
 		regmap_update_bits(regmap_i2s, I2S_RX_CFG,
 				   I2S_RX_IN_R | I2S_RX_DATA_ALIGNMENT |
 				   I2S_RX_CLOCK_ENABLE, 0);
 		regmap_write(regmap_i2s, I2S_RX_IRQ_CTL, 1);
 		regmap_write(regmap_i2s, I2S_RX_IRQ_IFF_THLD, 4);
 		regmap_write(regmap_i2s, I2S_RX_IRQ_OFF_THLD, 4);

 		regmap_read(regmap_i2s, I2S_RX_CFG_2, &slavemode);
 		slavemode = slavemode & I2S_RX_SLAVE_MODE_MASK;
 		if (!slavemode) {
 			regmap_read(regmap_i2s, I2S_TX_CFG, &enabled);
 			enabled = enabled & I2S_TX_ENABLE_MASK;
 			if (enabled)
 				regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
 						   I2S_TX_SLAVE_MODE_MASK,
 						   I2S_TX_MASTER_MODE);
 		}

 		regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
 				   I2S_RX_SLAVE_MODE_MASK, I2S_RX_SLAVE_MODE);
 	}
 }

 static const struct snd_soc_dai_ops bcm63xx_i2s_dai_ops = {
 	.startup = bcm63xx_i2s_startup,
 	.shutdown = bcm63xx_i2s_shutdown,
 	.hw_params = bcm63xx_i2s_hw_params,
 };

 static struct snd_soc_dai_driver bcm63xx_i2s_dai = {
 	.name = DRV_NAME,
 	.playback = {
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000_192000,
 		.formats = SNDRV_PCM_FMTBIT_S32_LE,
 	},
 	.capture = {
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000_192000,
 		.formats = SNDRV_PCM_FMTBIT_S32_LE,
 	},
 	.ops = &bcm63xx_i2s_dai_ops,
 	.symmetric_rate = 1,
 	.symmetric_channels = 1,
 };

 static const struct snd_soc_component_driver bcm63xx_i2s_component = {
 	.name = "bcm63xx",
 	.legacy_dai_naming = 1,
 };

 static int bcm63xx_i2s_dev_probe(struct platform_device *pdev)
 {
 	int ret = 0;
 	void __iomem *regs;
 	struct resource *r_mem, *region;
 	struct bcm_i2s_priv *i2s_priv;
 	struct regmap *regmap_i2s;
 	struct clk *i2s_clk;

 	i2s_priv = devm_kzalloc(&pdev->dev, sizeof(*i2s_priv), GFP_KERNEL);
 	if (!i2s_priv)
 		return -ENOMEM;

 	i2s_clk = devm_clk_get(&pdev->dev, "i2sclk");
 	if (IS_ERR(i2s_clk)) {
 		dev_err(&pdev->dev, "%s: cannot get a brcm clock: %ld\n",
 					__func__, PTR_ERR(i2s_clk));
 		return PTR_ERR(i2s_clk);
 	}

 	r_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!r_mem) {
 		dev_err(&pdev->dev, "Unable to get register resource.\n");
 		return -ENODEV;
 	}

 	region = devm_request_mem_region(&pdev->dev, r_mem->start,
 					resource_size(r_mem), DRV_NAME);
 	if (!region) {
 		dev_err(&pdev->dev, "Memory region already claimed\n");
 		return -EBUSY;
 	}

 	regs = devm_ioremap_resource(&pdev->dev, r_mem);
 	if (IS_ERR(regs)) {
 		ret = PTR_ERR(regs);
 		return ret;
 	}

 	regmap_i2s = devm_regmap_init_mmio(&pdev->dev,
 					regs, &brcm_i2s_regmap_config);
 	if (IS_ERR(regmap_i2s))
 		return PTR_ERR(regmap_i2s);

 	regmap_update_bits(regmap_i2s, I2S_MISC_CFG,
 			   I2S_PAD_LVL_LOOP_DIS_MASK,
 			   I2S_PAD_LVL_LOOP_DIS_ENABLE);

 	ret = devm_snd_soc_register_component(&pdev->dev,
 					      &bcm63xx_i2s_component,
 					      &bcm63xx_i2s_dai, 1);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register the dai\n");
 		return ret;
 	}

 	i2s_priv->dev = &pdev->dev;
 	i2s_priv->i2s_clk = i2s_clk;
 	i2s_priv->regmap_i2s = regmap_i2s;
 	dev_set_drvdata(&pdev->dev, i2s_priv);

 	ret = bcm63xx_soc_platform_probe(pdev, i2s_priv);
 	if (ret)
 		dev_err(&pdev->dev, "failed to register the pcm\n");

 	return ret;
 }

 static int bcm63xx_i2s_dev_remove(struct platform_device *pdev)
 {
 	bcm63xx_soc_platform_remove(pdev);
 	return 0;
 }

 #ifdef CONFIG_OF
 static const struct of_device_id snd_soc_bcm_audio_match[] = {
 	{.compatible = "brcm,bcm63xx-i2s"},
 	{ }
 };
 #endif

 static struct platform_driver bcm63xx_i2s_driver = {
 	.driver = {
 		.name = DRV_NAME,
 		.of_match_table = of_match_ptr(snd_soc_bcm_audio_match),
 	},
 	.probe = bcm63xx_i2s_dev_probe,
 	.remove = bcm63xx_i2s_dev_remove,
 };

 module_platform_driver(bcm63xx_i2s_driver);

 MODULE_AUTHOR("Kevin,Li <kevin-ke.li@broadcom.com>");
 MODULE_DESCRIPTION("Broadcom DSL XPON ASOC I2S Interface");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0-or-later
	// linux/sound/bcm/bcm63xx-i2s-whistler.c
	// BCM63xx whistler i2s driver
	// Copyright (c) 2020 Broadcom Corporation
	// Author: Kevin-Ke Li <kevin-ke.li@broadcom.com>

	#include <linux/clk.h>
	#include <linux/dma-mapping.h>
	#include <linux/io.h>
	#include <linux/module.h>
	#include <linux/regmap.h>
	#include <sound/pcm_params.h>
	#include <sound/soc.h>
	#include "bcm63xx-i2s.h"

	#define DRV_NAME "brcm-i2s"

	static bool brcm_i2s_wr_reg(struct device *dev, unsigned int reg)
	{
	switch (reg) {
	case I2S_TX_CFG ... I2S_TX_DESC_IFF_LEN:
	case I2S_TX_CFG_2 ... I2S_RX_DESC_IFF_LEN:
	case I2S_RX_CFG_2 ... I2S_REG_MAX:
	return true;
	default:
	return false;
	}
	}

	static bool brcm_i2s_rd_reg(struct device *dev, unsigned int reg)
	{
	switch (reg) {
	case I2S_TX_CFG ... I2S_REG_MAX:
	return true;
	default:
	return false;
	}
	}

	static bool brcm_i2s_volatile_reg(struct device *dev, unsigned int reg)
	{
	switch (reg) {
	case I2S_TX_CFG:
	case I2S_TX_IRQ_CTL:
	case I2S_TX_DESC_IFF_ADDR:
	case I2S_TX_DESC_IFF_LEN:
	case I2S_TX_DESC_OFF_ADDR:
	case I2S_TX_DESC_OFF_LEN:
	case I2S_TX_CFG_2:
	case I2S_RX_CFG:
	case I2S_RX_IRQ_CTL:
	case I2S_RX_DESC_OFF_ADDR:
	case I2S_RX_DESC_OFF_LEN:
	case I2S_RX_DESC_IFF_LEN:
	case I2S_RX_DESC_IFF_ADDR:
	case I2S_RX_CFG_2:
	return true;
	default:
	return false;
	}
	}

	static const struct regmap_config brcm_i2s_regmap_config = {
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 32,
	.max_register = I2S_REG_MAX,
	.writeable_reg = brcm_i2s_wr_reg,
	.readable_reg = brcm_i2s_rd_reg,
	.volatile_reg = brcm_i2s_volatile_reg,
	.cache_type = REGCACHE_FLAT,
	};

	static int bcm63xx_i2s_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	int ret = 0;
	struct bcm_i2s_priv *i2s_priv = snd_soc_dai_get_drvdata(dai);

	ret = clk_set_rate(i2s_priv->i2s_clk, params_rate(params));
	if (ret < 0)
	dev_err(i2s_priv->dev,
	"Can't set sample rate, err: %d\n", ret);

	return ret;
	}

	static int bcm63xx_i2s_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	unsigned int slavemode;
	struct bcm_i2s_priv *i2s_priv = snd_soc_dai_get_drvdata(dai);
	struct regmap *regmap_i2s = i2s_priv->regmap_i2s;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	regmap_update_bits(regmap_i2s, I2S_TX_CFG,
	I2S_TX_OUT_R \| I2S_TX_DATA_ALIGNMENT \|
	I2S_TX_DATA_ENABLE \| I2S_TX_CLOCK_ENABLE,
	I2S_TX_OUT_R \| I2S_TX_DATA_ALIGNMENT \|
	I2S_TX_DATA_ENABLE \| I2S_TX_CLOCK_ENABLE);
	regmap_write(regmap_i2s, I2S_TX_IRQ_CTL, 0);
	regmap_write(regmap_i2s, I2S_TX_IRQ_IFF_THLD, 0);
	regmap_write(regmap_i2s, I2S_TX_IRQ_OFF_THLD, 1);

	/* TX and RX block each have an independent bit to indicate
	* if it is generating the clock for the I2S bus. The bus
	* clocks need to be generated from either the TX or RX block,
	* but not both
	*/
	regmap_read(regmap_i2s, I2S_RX_CFG_2, &slavemode);
	if (slavemode & I2S_RX_SLAVE_MODE_MASK)
	regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
	I2S_TX_SLAVE_MODE_MASK,
	I2S_TX_MASTER_MODE);
	else
	regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
	I2S_TX_SLAVE_MODE_MASK,
	I2S_TX_SLAVE_MODE);
	} else {
	regmap_update_bits(regmap_i2s, I2S_RX_CFG,
	I2S_RX_IN_R \| I2S_RX_DATA_ALIGNMENT \|
	I2S_RX_CLOCK_ENABLE,
	I2S_RX_IN_R \| I2S_RX_DATA_ALIGNMENT \|
	I2S_RX_CLOCK_ENABLE);
	regmap_write(regmap_i2s, I2S_RX_IRQ_CTL, 0);
	regmap_write(regmap_i2s, I2S_RX_IRQ_IFF_THLD, 0);
	regmap_write(regmap_i2s, I2S_RX_IRQ_OFF_THLD, 1);

	regmap_read(regmap_i2s, I2S_TX_CFG_2, &slavemode);
	if (slavemode & I2S_TX_SLAVE_MODE_MASK)
	regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
	I2S_RX_SLAVE_MODE_MASK, 0);
	else
	regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
	I2S_RX_SLAVE_MODE_MASK,
	I2S_RX_SLAVE_MODE);
	}
	return 0;
	}

	static void bcm63xx_i2s_shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	unsigned int enabled, slavemode;
	struct bcm_i2s_priv *i2s_priv = snd_soc_dai_get_drvdata(dai);
	struct regmap *regmap_i2s = i2s_priv->regmap_i2s;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	regmap_update_bits(regmap_i2s, I2S_TX_CFG,
	I2S_TX_OUT_R \| I2S_TX_DATA_ALIGNMENT \|
	I2S_TX_DATA_ENABLE \| I2S_TX_CLOCK_ENABLE, 0);
	regmap_write(regmap_i2s, I2S_TX_IRQ_CTL, 1);
	regmap_write(regmap_i2s, I2S_TX_IRQ_IFF_THLD, 4);
	regmap_write(regmap_i2s, I2S_TX_IRQ_OFF_THLD, 4);

	regmap_read(regmap_i2s, I2S_TX_CFG_2, &slavemode);
	slavemode = slavemode & I2S_TX_SLAVE_MODE_MASK;
	if (!slavemode) {
	regmap_read(regmap_i2s, I2S_RX_CFG, &enabled);
	enabled = enabled & I2S_RX_ENABLE_MASK;
	if (enabled)
	regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
	I2S_RX_SLAVE_MODE_MASK,
	I2S_RX_MASTER_MODE);
	}
	regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
	I2S_TX_SLAVE_MODE_MASK,
	I2S_TX_SLAVE_MODE);
	} else {
	regmap_update_bits(regmap_i2s, I2S_RX_CFG,
	I2S_RX_IN_R \| I2S_RX_DATA_ALIGNMENT \|
	I2S_RX_CLOCK_ENABLE, 0);
	regmap_write(regmap_i2s, I2S_RX_IRQ_CTL, 1);
	regmap_write(regmap_i2s, I2S_RX_IRQ_IFF_THLD, 4);
	regmap_write(regmap_i2s, I2S_RX_IRQ_OFF_THLD, 4);

	regmap_read(regmap_i2s, I2S_RX_CFG_2, &slavemode);
	slavemode = slavemode & I2S_RX_SLAVE_MODE_MASK;
	if (!slavemode) {
	regmap_read(regmap_i2s, I2S_TX_CFG, &enabled);
	enabled = enabled & I2S_TX_ENABLE_MASK;
	if (enabled)
	regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
	I2S_TX_SLAVE_MODE_MASK,
	I2S_TX_MASTER_MODE);
	}

	regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
	I2S_RX_SLAVE_MODE_MASK, I2S_RX_SLAVE_MODE);
	}
	}

	static const struct snd_soc_dai_ops bcm63xx_i2s_dai_ops = {
	.startup = bcm63xx_i2s_startup,
	.shutdown = bcm63xx_i2s_shutdown,
	.hw_params = bcm63xx_i2s_hw_params,
	};

	static struct snd_soc_dai_driver bcm63xx_i2s_dai = {
	.name = DRV_NAME,
	.playback = {
	.channels_min = 2,
	.channels_max = 2,
	.rates = SNDRV_PCM_RATE_8000_192000,
	.formats = SNDRV_PCM_FMTBIT_S32_LE,
	},
	.capture = {
	.channels_min = 2,
	.channels_max = 2,
	.rates = SNDRV_PCM_RATE_8000_192000,
	.formats = SNDRV_PCM_FMTBIT_S32_LE,
	},
	.ops = &bcm63xx_i2s_dai_ops,
	.symmetric_rate = 1,
	.symmetric_channels = 1,
	};

	static const struct snd_soc_component_driver bcm63xx_i2s_component = {
	.name = "bcm63xx",
	.legacy_dai_naming = 1,
	};

	static int bcm63xx_i2s_dev_probe(struct platform_device *pdev)
	{
	int ret = 0;
	void __iomem *regs;
	struct resource r_mem, region;
	struct bcm_i2s_priv *i2s_priv;
	struct regmap *regmap_i2s;
	struct clk *i2s_clk;

	i2s_priv = devm_kzalloc(&pdev->dev, sizeof(*i2s_priv), GFP_KERNEL);
	if (!i2s_priv)
	return -ENOMEM;

	i2s_clk = devm_clk_get(&pdev->dev, "i2sclk");
	if (IS_ERR(i2s_clk)) {
	dev_err(&pdev->dev, "%s: cannot get a brcm clock: %ld\n",
	__func__, PTR_ERR(i2s_clk));
	return PTR_ERR(i2s_clk);
	}

	r_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!r_mem) {
	dev_err(&pdev->dev, "Unable to get register resource.\n");
	return -ENODEV;
	}

	region = devm_request_mem_region(&pdev->dev, r_mem->start,
	resource_size(r_mem), DRV_NAME);
	if (!region) {
	dev_err(&pdev->dev, "Memory region already claimed\n");
	return -EBUSY;
	}

	regs = devm_ioremap_resource(&pdev->dev, r_mem);
	if (IS_ERR(regs)) {
	ret = PTR_ERR(regs);
	return ret;
	}

	regmap_i2s = devm_regmap_init_mmio(&pdev->dev,
	regs, &brcm_i2s_regmap_config);
	if (IS_ERR(regmap_i2s))
	return PTR_ERR(regmap_i2s);

	regmap_update_bits(regmap_i2s, I2S_MISC_CFG,
	I2S_PAD_LVL_LOOP_DIS_MASK,
	I2S_PAD_LVL_LOOP_DIS_ENABLE);

	ret = devm_snd_soc_register_component(&pdev->dev,
	&bcm63xx_i2s_component,
	&bcm63xx_i2s_dai, 1);
	if (ret) {
	dev_err(&pdev->dev, "failed to register the dai\n");
	return ret;
	}

	i2s_priv->dev = &pdev->dev;
	i2s_priv->i2s_clk = i2s_clk;
	i2s_priv->regmap_i2s = regmap_i2s;
	dev_set_drvdata(&pdev->dev, i2s_priv);

	ret = bcm63xx_soc_platform_probe(pdev, i2s_priv);
	if (ret)
	dev_err(&pdev->dev, "failed to register the pcm\n");

	return ret;
	}

	static int bcm63xx_i2s_dev_remove(struct platform_device *pdev)
	{
	bcm63xx_soc_platform_remove(pdev);
	return 0;
	}

	#ifdef CONFIG_OF
	static const struct of_device_id snd_soc_bcm_audio_match[] = {
	{.compatible = "brcm,bcm63xx-i2s"},
	{ }
	};
	#endif

	static struct platform_driver bcm63xx_i2s_driver = {
	.driver = {
	.name = DRV_NAME,
	.of_match_table = of_match_ptr(snd_soc_bcm_audio_match),
	},
	.probe = bcm63xx_i2s_dev_probe,
	.remove = bcm63xx_i2s_dev_remove,
	};

	module_platform_driver(bcm63xx_i2s_driver);

	MODULE_AUTHOR("Kevin,Li <kevin-ke.li@broadcom.com>");
	MODULE_DESCRIPTION("Broadcom DSL XPON ASOC I2S Interface");
	MODULE_LICENSE("GPL v2");