[deliverable/linux.git] / sound / soc / codecs / ad193x.c

/*
 * AD193X Audio Codec driver supporting AD1936/7/8/9
 *
 * Copyright 2010 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/soc-dapm.h>
#include "ad193x.h"

/* codec private data */
struct ad193x_priv {
	u8 reg_cache[AD193X_NUM_REGS];
	enum snd_soc_control_type bus_type;
	void *control_data;
	int sysclk;
};

/* ad193x register cache & default register settings */
static const u8 ad193x_reg[AD193X_NUM_REGS] = {
	0, 0, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0,
};

/*
 * AD193X volume/mute/de-emphasis etc. controls
 */
static const char *ad193x_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};

static const struct soc_enum ad193x_deemp_enum =
	SOC_ENUM_SINGLE(AD193X_DAC_CTRL2, 1, 4, ad193x_deemp);

static const struct snd_kcontrol_new ad193x_snd_controls[] = {
	/* DAC volume control */
	SOC_DOUBLE_R("DAC1 Volume", AD193X_DAC_L1_VOL,
			AD193X_DAC_R1_VOL, 0, 0xFF, 1),
	SOC_DOUBLE_R("DAC2 Volume", AD193X_DAC_L2_VOL,
			AD193X_DAC_R2_VOL, 0, 0xFF, 1),
	SOC_DOUBLE_R("DAC3 Volume", AD193X_DAC_L3_VOL,
			AD193X_DAC_R3_VOL, 0, 0xFF, 1),
	SOC_DOUBLE_R("DAC4 Volume", AD193X_DAC_L4_VOL,
			AD193X_DAC_R4_VOL, 0, 0xFF, 1),

	/* ADC switch control */
	SOC_DOUBLE("ADC1 Switch", AD193X_ADC_CTRL0, AD193X_ADCL1_MUTE,
		AD193X_ADCR1_MUTE, 1, 1),
	SOC_DOUBLE("ADC2 Switch", AD193X_ADC_CTRL0, AD193X_ADCL2_MUTE,
		AD193X_ADCR2_MUTE, 1, 1),

	/* DAC switch control */
	SOC_DOUBLE("DAC1 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL1_MUTE,
		AD193X_DACR1_MUTE, 1, 1),
	SOC_DOUBLE("DAC2 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL2_MUTE,
		AD193X_DACR2_MUTE, 1, 1),
	SOC_DOUBLE("DAC3 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL3_MUTE,
		AD193X_DACR3_MUTE, 1, 1),
	SOC_DOUBLE("DAC4 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL4_MUTE,
		AD193X_DACR4_MUTE, 1, 1),

	/* ADC high-pass filter */
	SOC_SINGLE("ADC High Pass Filter Switch", AD193X_ADC_CTRL0,
			AD193X_ADC_HIGHPASS_FILTER, 1, 0),

	/* DAC de-emphasis */
	SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
};

static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1),
	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
	SND_SOC_DAPM_OUTPUT("DAC1OUT"),
	SND_SOC_DAPM_OUTPUT("DAC2OUT"),
	SND_SOC_DAPM_OUTPUT("DAC3OUT"),
	SND_SOC_DAPM_OUTPUT("DAC4OUT"),
	SND_SOC_DAPM_INPUT("ADC1IN"),
	SND_SOC_DAPM_INPUT("ADC2IN"),
};

static const struct snd_soc_dapm_route audio_paths[] = {
	{ "DAC", NULL, "PLL_PWR" },
	{ "ADC", NULL, "PLL_PWR" },
	{ "DAC", NULL, "ADC_PWR" },
	{ "ADC", NULL, "ADC_PWR" },
	{ "DAC1OUT", "DAC1 Switch", "DAC" },
	{ "DAC2OUT", "DAC2 Switch", "DAC" },
	{ "DAC3OUT", "DAC3 Switch", "DAC" },
	{ "DAC4OUT", "DAC4 Switch", "DAC" },
	{ "ADC", "ADC1 Switch", "ADC1IN" },
	{ "ADC", "ADC2 Switch", "ADC2IN" },
};

/*
 * DAI ops entries
 */

static int ad193x_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	int reg;

	reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
	reg = (mute > 0) ? reg | AD193X_DAC_MASTER_MUTE : reg &
		(~AD193X_DAC_MASTER_MUTE);
	snd_soc_write(codec, AD193X_DAC_CTRL2, reg);

	return 0;
}

static int ad193x_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
			       unsigned int rx_mask, int slots, int width)
{
	struct snd_soc_codec *codec = dai->codec;
	int dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
	int adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);

	dac_reg &= ~AD193X_DAC_CHAN_MASK;
	adc_reg &= ~AD193X_ADC_CHAN_MASK;

	switch (slots) {
	case 2:
		dac_reg |= AD193X_DAC_2_CHANNELS << AD193X_DAC_CHAN_SHFT;
		adc_reg |= AD193X_ADC_2_CHANNELS << AD193X_ADC_CHAN_SHFT;
		break;
	case 4:
		dac_reg |= AD193X_DAC_4_CHANNELS << AD193X_DAC_CHAN_SHFT;
		adc_reg |= AD193X_ADC_4_CHANNELS << AD193X_ADC_CHAN_SHFT;
		break;
	case 8:
		dac_reg |= AD193X_DAC_8_CHANNELS << AD193X_DAC_CHAN_SHFT;
		adc_reg |= AD193X_ADC_8_CHANNELS << AD193X_ADC_CHAN_SHFT;
		break;
	case 16:
		dac_reg |= AD193X_DAC_16_CHANNELS << AD193X_DAC_CHAN_SHFT;
		adc_reg |= AD193X_ADC_16_CHANNELS << AD193X_ADC_CHAN_SHFT;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
	snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);

	return 0;
}

static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	int adc_reg1, adc_reg2, dac_reg;

	adc_reg1 = snd_soc_read(codec, AD193X_ADC_CTRL1);
	adc_reg2 = snd_soc_read(codec, AD193X_ADC_CTRL2);
	dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);

	/* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
	 * with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
	 */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
		adc_reg1 |= AD193X_ADC_SERFMT_TDM;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
		adc_reg1 |= AD193X_ADC_SERFMT_AUX;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
		adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
		adc_reg2 &= ~AD193X_ADC_BCLK_INV;
		dac_reg &= ~AD193X_DAC_LEFT_HIGH;
		dac_reg &= ~AD193X_DAC_BCLK_INV;
		break;
	case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
		adc_reg2 |= AD193X_ADC_LEFT_HIGH;
		adc_reg2 &= ~AD193X_ADC_BCLK_INV;
		dac_reg |= AD193X_DAC_LEFT_HIGH;
		dac_reg &= ~AD193X_DAC_BCLK_INV;
		break;
	case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
		adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
		adc_reg2 |= AD193X_ADC_BCLK_INV;
		dac_reg &= ~AD193X_DAC_LEFT_HIGH;
		dac_reg |= AD193X_DAC_BCLK_INV;
		break;

	case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
		adc_reg2 |= AD193X_ADC_LEFT_HIGH;
		adc_reg2 |= AD193X_ADC_BCLK_INV;
		dac_reg |= AD193X_DAC_LEFT_HIGH;
		dac_reg |= AD193X_DAC_BCLK_INV;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
		adc_reg2 |= AD193X_ADC_LCR_MASTER;
		adc_reg2 |= AD193X_ADC_BCLK_MASTER;
		dac_reg |= AD193X_DAC_LCR_MASTER;
		dac_reg |= AD193X_DAC_BCLK_MASTER;
		break;
	case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
		adc_reg2 |= AD193X_ADC_LCR_MASTER;
		adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
		dac_reg |= AD193X_DAC_LCR_MASTER;
		dac_reg &= ~AD193X_DAC_BCLK_MASTER;
		break;
	case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
		adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
		adc_reg2 |= AD193X_ADC_BCLK_MASTER;
		dac_reg &= ~AD193X_DAC_LCR_MASTER;
		dac_reg |= AD193X_DAC_BCLK_MASTER;
		break;
	case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
		adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
		adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
		dac_reg &= ~AD193X_DAC_LCR_MASTER;
		dac_reg &= ~AD193X_DAC_BCLK_MASTER;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_write(codec, AD193X_ADC_CTRL1, adc_reg1);
	snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg2);
	snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);

	return 0;
}

static int ad193x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
		int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
	switch (freq) {
	case 12288000:
	case 18432000:
	case 24576000:
	case 36864000:
		ad193x->sysclk = freq;
		return 0;
	}
	return -EINVAL;
}

static int ad193x_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params,
		struct snd_soc_dai *dai)
{
	int word_len = 0, reg = 0, master_rate = 0;

	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->codec;
	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);

	/* bit size */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		word_len = 3;
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		word_len = 1;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
	case SNDRV_PCM_FORMAT_S32_LE:
		word_len = 0;
		break;
	}

	switch (ad193x->sysclk) {
	case 12288000:
		master_rate = AD193X_PLL_INPUT_256;
		break;
	case 18432000:
		master_rate = AD193X_PLL_INPUT_384;
		break;
	case 24576000:
		master_rate = AD193X_PLL_INPUT_512;
		break;
	case 36864000:
		master_rate = AD193X_PLL_INPUT_768;
		break;
	}

	reg = snd_soc_read(codec, AD193X_PLL_CLK_CTRL0);
	reg = (reg & AD193X_PLL_INPUT_MASK) | master_rate;
	snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, reg);

	reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
	reg = (reg & (~AD193X_DAC_WORD_LEN_MASK)) | word_len;
	snd_soc_write(codec, AD193X_DAC_CTRL2, reg);

	reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
	reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) | word_len;
	snd_soc_write(codec, AD193X_ADC_CTRL1, reg);

	return 0;
}

static struct snd_soc_dai_ops ad193x_dai_ops = {
	.hw_params = ad193x_hw_params,
	.digital_mute = ad193x_mute,
	.set_tdm_slot = ad193x_set_tdm_slot,
	.set_sysclk	= ad193x_set_dai_sysclk,
	.set_fmt = ad193x_set_dai_fmt,
};

/* codec DAI instance */
static struct snd_soc_dai_driver ad193x_dai = {
	.name = "ad193x-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 8,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
			SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 2,
		.channels_max = 4,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
			SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
	},
	.ops = &ad193x_dai_ops,
};

static int ad193x_probe(struct snd_soc_codec *codec)
{
	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
	struct snd_soc_dapm_context *dapm = &codec->dapm;
	int ret;

	codec->control_data = ad193x->control_data;
	if (ad193x->bus_type == SND_SOC_I2C)
		ret = snd_soc_codec_set_cache_io(codec, 8, 8, ad193x->bus_type);
	else
		ret = snd_soc_codec_set_cache_io(codec, 16, 8, ad193x->bus_type);
	if (ret < 0) {
		dev_err(codec->dev, "failed to set cache I/O: %d\n",
				ret);
		kfree(ad193x);
		return ret;
	}

	/* default setting for ad193x */

	/* unmute dac channels */
	snd_soc_write(codec, AD193X_DAC_CHNL_MUTE, 0x0);
	/* de-emphasis: 48kHz, powedown dac */
	snd_soc_write(codec, AD193X_DAC_CTRL2, 0x1A);
	/* powerdown dac, dac in tdm mode */
	snd_soc_write(codec, AD193X_DAC_CTRL0, 0x41);
	/* high-pass filter enable */
	snd_soc_write(codec, AD193X_ADC_CTRL0, 0x3);
	/* sata delay=1, adc aux mode */
	snd_soc_write(codec, AD193X_ADC_CTRL1, 0x43);
	/* pll input: mclki/xi */
	snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
	snd_soc_write(codec, AD193X_PLL_CLK_CTRL1, 0x04);

	snd_soc_add_controls(codec, ad193x_snd_controls,
			     ARRAY_SIZE(ad193x_snd_controls));
	snd_soc_dapm_new_controls(dapm, ad193x_dapm_widgets,
				  ARRAY_SIZE(ad193x_dapm_widgets));
	snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));

	return ret;
}

static struct snd_soc_codec_driver soc_codec_dev_ad193x = {
	.probe = 	ad193x_probe,
	.reg_cache_default = ad193x_reg,
	.reg_cache_size = AD193X_NUM_REGS,
	.reg_word_size = sizeof(u16),
};

#if defined(CONFIG_SPI_MASTER)
static int __devinit ad193x_spi_probe(struct spi_device *spi)
{
	struct ad193x_priv *ad193x;
	int ret;

	ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
	if (ad193x == NULL)
		return -ENOMEM;

	spi_set_drvdata(spi, ad193x);
	ad193x->control_data = spi;
	ad193x->bus_type = SND_SOC_SPI;

	ret = snd_soc_register_codec(&spi->dev,
			&soc_codec_dev_ad193x, &ad193x_dai, 1);
	if (ret < 0)
		kfree(ad193x);
	return ret;
}

static int __devexit ad193x_spi_remove(struct spi_device *spi)
{
	snd_soc_unregister_codec(&spi->dev);
	kfree(spi_get_drvdata(spi));
	return 0;
}

static struct spi_driver ad193x_spi_driver = {
	.driver = {
		.name	= "ad193x-codec",
		.owner	= THIS_MODULE,
	},
	.probe		= ad193x_spi_probe,
	.remove		= __devexit_p(ad193x_spi_remove),
};
#endif

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static const struct i2c_device_id ad193x_id[] = {
	{ "ad1936", 0 },
	{ "ad1937", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ad193x_id);

static int __devinit ad193x_i2c_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
{
	struct ad193x_priv *ad193x;
	int ret;

	ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
	if (ad193x == NULL)
		return -ENOMEM;

	i2c_set_clientdata(client, ad193x);
	ad193x->control_data = client;
	ad193x->bus_type = SND_SOC_I2C;

	ret =  snd_soc_register_codec(&client->dev,
			&soc_codec_dev_ad193x, &ad193x_dai, 1);
	if (ret < 0)
		kfree(ad193x);
	return ret;
}

static int __devexit ad193x_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	kfree(i2c_get_clientdata(client));
	return 0;
}

static struct i2c_driver ad193x_i2c_driver = {
	.driver = {
		.name = "ad193x-codec",
	},
	.probe    = ad193x_i2c_probe,
	.remove   = __devexit_p(ad193x_i2c_remove),
	.id_table = ad193x_id,
};
#endif

static int __init ad193x_modinit(void)
{
	int ret;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	ret =  i2c_add_driver(&ad193x_i2c_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
				ret);
	}
#endif

#if defined(CONFIG_SPI_MASTER)
	ret = spi_register_driver(&ad193x_spi_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
				ret);
	}
#endif
	return ret;
}
module_init(ad193x_modinit);

static void __exit ad193x_modexit(void)
{
#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&ad193x_spi_driver);
#endif

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&ad193x_i2c_driver);
#endif
}
module_exit(ad193x_modexit);

MODULE_DESCRIPTION("ASoC ad193x driver");
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
a1533d94 BS	1	/*
	2	* AD193X Audio Codec driver supporting AD1936/7/8/9
	3	*
	4	* Copyright 2010 Analog Devices Inc.
	5	*
	6	* Licensed under the GPL-2 or later.
	7	*/
	8
	9	#include <linux/init.h>
	10	#include <linux/module.h>
	11	#include <linux/kernel.h>
	12	#include <linux/device.h>
	13	#include <linux/i2c.h>
	14	#include <linux/spi/spi.h>
1b132ea0	15	#include <linux/slab.h>
a1533d94 BS	16	#include <sound/core.h>
	17	#include <sound/pcm.h>
	18	#include <sound/pcm_params.h>
	19	#include <sound/initval.h>
	20	#include <sound/soc.h>
	21	#include <sound/tlv.h>
	22	#include <sound/soc-dapm.h>
	23	#include "ad193x.h"
	24
	25	/* codec private data */
	26	struct ad193x_priv {
a1533d94	27	u8 reg_cache[AD193X_NUM_REGS];
f0fba2ad LG	28	enum snd_soc_control_type bus_type;
	29	void *control_data;
	30	int sysclk;
a1533d94 BS	31	};
	32
	33	/* ad193x register cache & default register settings */
	34	static const u8 ad193x_reg[AD193X_NUM_REGS] = {
	35	0, 0, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0,
	36	};
	37
a1533d94 BS	38	/*
	39	* AD193X volume/mute/de-emphasis etc. controls
	40	*/
	41	static const char *ad193x_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};
	42
	43	static const struct soc_enum ad193x_deemp_enum =
	44	SOC_ENUM_SINGLE(AD193X_DAC_CTRL2, 1, 4, ad193x_deemp);
	45
	46	static const struct snd_kcontrol_new ad193x_snd_controls[] = {
	47	/* DAC volume control */
ba0a24e7	48	SOC_DOUBLE_R("DAC1 Volume", AD193X_DAC_L1_VOL,
a1533d94	49	AD193X_DAC_R1_VOL, 0, 0xFF, 1),
ba0a24e7	50	SOC_DOUBLE_R("DAC2 Volume", AD193X_DAC_L2_VOL,
a1533d94	51	AD193X_DAC_R2_VOL, 0, 0xFF, 1),
ba0a24e7	52	SOC_DOUBLE_R("DAC3 Volume", AD193X_DAC_L3_VOL,
a1533d94	53	AD193X_DAC_R3_VOL, 0, 0xFF, 1),
ba0a24e7	54	SOC_DOUBLE_R("DAC4 Volume", AD193X_DAC_L4_VOL,
a1533d94 BS	55	AD193X_DAC_R4_VOL, 0, 0xFF, 1),
	56
	57	/* ADC switch control */
	58	SOC_DOUBLE("ADC1 Switch", AD193X_ADC_CTRL0, AD193X_ADCL1_MUTE,
	59	AD193X_ADCR1_MUTE, 1, 1),
	60	SOC_DOUBLE("ADC2 Switch", AD193X_ADC_CTRL0, AD193X_ADCL2_MUTE,
	61	AD193X_ADCR2_MUTE, 1, 1),
	62
	63	/* DAC switch control */
	64	SOC_DOUBLE("DAC1 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL1_MUTE,
	65	AD193X_DACR1_MUTE, 1, 1),
	66	SOC_DOUBLE("DAC2 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL2_MUTE,
	67	AD193X_DACR2_MUTE, 1, 1),
	68	SOC_DOUBLE("DAC3 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL3_MUTE,
	69	AD193X_DACR3_MUTE, 1, 1),
	70	SOC_DOUBLE("DAC4 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL4_MUTE,
	71	AD193X_DACR4_MUTE, 1, 1),
	72
	73	/* ADC high-pass filter */
	74	SOC_SINGLE("ADC High Pass Filter Switch", AD193X_ADC_CTRL0,
	75	AD193X_ADC_HIGHPASS_FILTER, 1, 0),
	76
	77	/* DAC de-emphasis */
	78	SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
	79	};
	80
	81	static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
	82	SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1),
	83	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
	84	SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
	85	SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
	86	SND_SOC_DAPM_OUTPUT("DAC1OUT"),
	87	SND_SOC_DAPM_OUTPUT("DAC2OUT"),
	88	SND_SOC_DAPM_OUTPUT("DAC3OUT"),
	89	SND_SOC_DAPM_OUTPUT("DAC4OUT"),
	90	SND_SOC_DAPM_INPUT("ADC1IN"),
	91	SND_SOC_DAPM_INPUT("ADC2IN"),
	92	};
	93
	94	static const struct snd_soc_dapm_route audio_paths[] = {
	95	{ "DAC", NULL, "PLL_PWR" },
	96	{ "ADC", NULL, "PLL_PWR" },
	97	{ "DAC", NULL, "ADC_PWR" },
	98	{ "ADC", NULL, "ADC_PWR" },
	99	{ "DAC1OUT", "DAC1 Switch", "DAC" },
	100	{ "DAC2OUT", "DAC2 Switch", "DAC" },
	101	{ "DAC3OUT", "DAC3 Switch", "DAC" },
	102	{ "DAC4OUT", "DAC4 Switch", "DAC" },
	103	{ "ADC", "ADC1 Switch", "ADC1IN" },
	104	{ "ADC", "ADC2 Switch", "ADC2IN" },
	105	};
	106
	107	/*
	108	* DAI ops entries
	109	*/
	110
	111	static int ad193x_mute(struct snd_soc_dai *dai, int mute)
	112	{
	113	struct snd_soc_codec *codec = dai->codec;
	114	int reg;
	115
	116	reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
	117	reg = (mute > 0) ? reg \| AD193X_DAC_MASTER_MUTE : reg &
	118	(~AD193X_DAC_MASTER_MUTE);
119	snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
120
121	return 0;
122	}
123
124	static int ad193x_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
125	unsigned int rx_mask, int slots, int width)
126	{
127	struct snd_soc_codec *codec = dai->codec;
128	int dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
129	int adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);
130
131	dac_reg &= ~AD193X_DAC_CHAN_MASK;
132	adc_reg &= ~AD193X_ADC_CHAN_MASK;
133
134	switch (slots) {
135	case 2:
136	dac_reg \|= AD193X_DAC_2_CHANNELS << AD193X_DAC_CHAN_SHFT;
137	adc_reg \|= AD193X_ADC_2_CHANNELS << AD193X_ADC_CHAN_SHFT;
138	break;
139	case 4:
140	dac_reg \|= AD193X_DAC_4_CHANNELS << AD193X_DAC_CHAN_SHFT;
141	adc_reg \|= AD193X_ADC_4_CHANNELS << AD193X_ADC_CHAN_SHFT;
142	break;
143	case 8:
144	dac_reg \|= AD193X_DAC_8_CHANNELS << AD193X_DAC_CHAN_SHFT;
145	adc_reg \|= AD193X_ADC_8_CHANNELS << AD193X_ADC_CHAN_SHFT;
146	break;
147	case 16:
148	dac_reg \|= AD193X_DAC_16_CHANNELS << AD193X_DAC_CHAN_SHFT;
149	adc_reg \|= AD193X_ADC_16_CHANNELS << AD193X_ADC_CHAN_SHFT;
150	break;
151	default:
152	return -EINVAL;
153	}
154
155	snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
156	snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);
157
158	return 0;
159	}
160
161	static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
162	unsigned int fmt)
163	{
164	struct snd_soc_codec *codec = codec_dai->codec;
d6bdc0f7	165	int adc_reg1, adc_reg2, dac_reg;
a1533d94	166
d6bdc0f7 BS	167	adc_reg1 = snd_soc_read(codec, AD193X_ADC_CTRL1);
d6bdc0f7 BS	168	adc_reg2 = snd_soc_read(codec, AD193X_ADC_CTRL2);
a1533d94 BS	169	dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
	170
	171	/* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
	172	* with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
	173	*/
	174	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	175	case SND_SOC_DAIFMT_I2S:
d6bdc0f7 BS	176	adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
d6bdc0f7 BS	177	adc_reg1 \|= AD193X_ADC_SERFMT_TDM;
a1533d94 BS	178	break;
a1533d94 BS	179	case SND_SOC_DAIFMT_DSP_A:
d6bdc0f7 BS	180	adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
d6bdc0f7 BS	181	adc_reg1 \|= AD193X_ADC_SERFMT_AUX;
a1533d94 BS	182	break;
	183	default:
	184	return -EINVAL;
	185	}
	186
	187	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	188	case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
d6bdc0f7 BS	189	adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
d6bdc0f7 BS	190	adc_reg2 &= ~AD193X_ADC_BCLK_INV;
a1533d94 BS	191	dac_reg &= ~AD193X_DAC_LEFT_HIGH;
	192	dac_reg &= ~AD193X_DAC_BCLK_INV;
	193	break;
	194	case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
d6bdc0f7 BS	195	adc_reg2 \|= AD193X_ADC_LEFT_HIGH;
d6bdc0f7 BS	196	adc_reg2 &= ~AD193X_ADC_BCLK_INV;
a1533d94 BS	197	dac_reg \|= AD193X_DAC_LEFT_HIGH;
	198	dac_reg &= ~AD193X_DAC_BCLK_INV;
	199	break;
	200	case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
d6bdc0f7 BS	201	adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
d6bdc0f7 BS	202	adc_reg2 \|= AD193X_ADC_BCLK_INV;
a1533d94 BS	203	dac_reg &= ~AD193X_DAC_LEFT_HIGH;
	204	dac_reg \|= AD193X_DAC_BCLK_INV;
	205	break;
	206
	207	case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
d6bdc0f7 BS	208	adc_reg2 \|= AD193X_ADC_LEFT_HIGH;
d6bdc0f7 BS	209	adc_reg2 \|= AD193X_ADC_BCLK_INV;
a1533d94 BS	210	dac_reg \|= AD193X_DAC_LEFT_HIGH;
	211	dac_reg \|= AD193X_DAC_BCLK_INV;
	212	break;
	213	default:
	214	return -EINVAL;
	215	}
	216
	217	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	218	case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
d6bdc0f7 BS	219	adc_reg2 \|= AD193X_ADC_LCR_MASTER;
d6bdc0f7 BS	220	adc_reg2 \|= AD193X_ADC_BCLK_MASTER;
a1533d94 BS	221	dac_reg \|= AD193X_DAC_LCR_MASTER;
	222	dac_reg \|= AD193X_DAC_BCLK_MASTER;
	223	break;
	224	case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
d6bdc0f7 BS	225	adc_reg2 \|= AD193X_ADC_LCR_MASTER;
d6bdc0f7 BS	226	adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
a1533d94 BS	227	dac_reg \|= AD193X_DAC_LCR_MASTER;
	228	dac_reg &= ~AD193X_DAC_BCLK_MASTER;
	229	break;
	230	case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
d6bdc0f7 BS	231	adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
d6bdc0f7 BS	232	adc_reg2 \|= AD193X_ADC_BCLK_MASTER;
a1533d94 BS	233	dac_reg &= ~AD193X_DAC_LCR_MASTER;
	234	dac_reg \|= AD193X_DAC_BCLK_MASTER;
	235	break;
	236	case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
d6bdc0f7 BS	237	adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
d6bdc0f7 BS	238	adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
a1533d94 BS	239	dac_reg &= ~AD193X_DAC_LCR_MASTER;
	240	dac_reg &= ~AD193X_DAC_BCLK_MASTER;
	241	break;
	242	default:
	243	return -EINVAL;
	244	}
	245
d6bdc0f7 BS	246	snd_soc_write(codec, AD193X_ADC_CTRL1, adc_reg1);
d6bdc0f7 BS	247	snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg2);
a1533d94 BS	248	snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
	249
	250	return 0;
	251	}
	252
fab90aa4 BS	253	static int ad193x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	254	int clk_id, unsigned int freq, int dir)
	255	{
	256	struct snd_soc_codec *codec = codec_dai->codec;
	257	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
	258	switch (freq) {
	259	case 12288000:
	260	case 18432000:
	261	case 24576000:
	262	case 36864000:
	263	ad193x->sysclk = freq;
	264	return 0;
	265	}
	266	return -EINVAL;
	267	}
	268
a1533d94 BS	269	static int ad193x_hw_params(struct snd_pcm_substream *substream,
	270	struct snd_pcm_hw_params *params,
	271	struct snd_soc_dai *dai)
	272	{
fab90aa4	273	int word_len = 0, reg = 0, master_rate = 0;
a1533d94 BS	274
a1533d94 BS	275	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	276	struct snd_soc_codec *codec = rtd->codec;
fab90aa4	277	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
a1533d94 BS	278
	279	/* bit size */
	280	switch (params_format(params)) {
	281	case SNDRV_PCM_FORMAT_S16_LE:
	282	word_len = 3;
	283	break;
	284	case SNDRV_PCM_FORMAT_S20_3LE:
	285	word_len = 1;
	286	break;
	287	case SNDRV_PCM_FORMAT_S24_LE:
	288	case SNDRV_PCM_FORMAT_S32_LE:
	289	word_len = 0;
	290	break;
	291	}
	292
fab90aa4 BS	293	switch (ad193x->sysclk) {
	294	case 12288000:
	295	master_rate = AD193X_PLL_INPUT_256;
	296	break;
	297	case 18432000:
	298	master_rate = AD193X_PLL_INPUT_384;
	299	break;
	300	case 24576000:
	301	master_rate = AD193X_PLL_INPUT_512;
	302	break;
	303	case 36864000:
	304	master_rate = AD193X_PLL_INPUT_768;
	305	break;
	306	}
	307
	308	reg = snd_soc_read(codec, AD193X_PLL_CLK_CTRL0);
	309	reg = (reg & AD193X_PLL_INPUT_MASK) \| master_rate;
	310	snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, reg);
	311
a1533d94 BS	312	reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
	313	reg = (reg & (~AD193X_DAC_WORD_LEN_MASK)) \| word_len;
	314	snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
	315
	316	reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
	317	reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) \| word_len;
	318	snd_soc_write(codec, AD193X_ADC_CTRL1, reg);
	319
	320	return 0;
	321	}
	322
9dd7b79a BS	323	static struct snd_soc_dai_ops ad193x_dai_ops = {
	324	.hw_params = ad193x_hw_params,
	325	.digital_mute = ad193x_mute,
	326	.set_tdm_slot = ad193x_set_tdm_slot,
fab90aa4	327	.set_sysclk = ad193x_set_dai_sysclk,
9dd7b79a BS	328	.set_fmt = ad193x_set_dai_fmt,
	329	};
	330
	331	/* codec DAI instance */
f0fba2ad LG	332	static struct snd_soc_dai_driver ad193x_dai = {
f0fba2ad LG	333	.name = "ad193x-hifi",
9dd7b79a BS	334	.playback = {
	335	.stream_name = "Playback",
	336	.channels_min = 2,
	337	.channels_max = 8,
	338	.rates = SNDRV_PCM_RATE_48000,
	339	.formats = SNDRV_PCM_FMTBIT_S32_LE \| SNDRV_PCM_FMTBIT_S16_LE \|
	340	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S24_LE,
	341	},
	342	.capture = {
	343	.stream_name = "Capture",
	344	.channels_min = 2,
	345	.channels_max = 4,
	346	.rates = SNDRV_PCM_RATE_48000,
	347	.formats = SNDRV_PCM_FMTBIT_S32_LE \| SNDRV_PCM_FMTBIT_S16_LE \|
	348	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_S24_LE,
	349	},
	350	.ops = &ad193x_dai_ops,
	351	};
9dd7b79a	352
f0fba2ad	353	static int ad193x_probe(struct snd_soc_codec *codec)
a1533d94	354	{
f0fba2ad	355	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
ce6120cc	356	struct snd_soc_dapm_context *dapm = &codec->dapm;
f0fba2ad	357	int ret;
a1533d94	358
f0fba2ad LG	359	codec->control_data = ad193x->control_data;
	360	if (ad193x->bus_type == SND_SOC_I2C)
	361	ret = snd_soc_codec_set_cache_io(codec, 8, 8, ad193x->bus_type);
	362	else
	363	ret = snd_soc_codec_set_cache_io(codec, 16, 8, ad193x->bus_type);
	364	if (ret < 0) {
	365	dev_err(codec->dev, "failed to set cache I/O: %d\n",
	366	ret);
	367	kfree(ad193x);
	368	return ret;
a1533d94 BS	369	}
a1533d94 BS	370
f0fba2ad	371	/* default setting for ad193x */
a1533d94	372
f0fba2ad LG	373	/* unmute dac channels */
	374	snd_soc_write(codec, AD193X_DAC_CHNL_MUTE, 0x0);
	375	/* de-emphasis: 48kHz, powedown dac */
	376	snd_soc_write(codec, AD193X_DAC_CTRL2, 0x1A);
	377	/* powerdown dac, dac in tdm mode */
	378	snd_soc_write(codec, AD193X_DAC_CTRL0, 0x41);
	379	/* high-pass filter enable */
	380	snd_soc_write(codec, AD193X_ADC_CTRL0, 0x3);
	381	/* sata delay=1, adc aux mode */
	382	snd_soc_write(codec, AD193X_ADC_CTRL1, 0x43);
	383	/* pll input: mclki/xi */
	384	snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
	385	snd_soc_write(codec, AD193X_PLL_CLK_CTRL1, 0x04);
a1533d94 BS	386
	387	snd_soc_add_controls(codec, ad193x_snd_controls,
	388	ARRAY_SIZE(ad193x_snd_controls));
ce6120cc	389	snd_soc_dapm_new_controls(dapm, ad193x_dapm_widgets,
a1533d94	390	ARRAY_SIZE(ad193x_dapm_widgets));
ce6120cc	391	snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));
a1533d94	392
a1533d94 BS	393	return ret;
	394	}
	395
f0fba2ad	396	static struct snd_soc_codec_driver soc_codec_dev_ad193x = {
a1533d94	397	.probe = ad193x_probe,
f0fba2ad LG	398	.reg_cache_default = ad193x_reg,
	399	.reg_cache_size = AD193X_NUM_REGS,
	400	.reg_word_size = sizeof(u16),
a1533d94	401	};
a1533d94 BS	402
	403	#if defined(CONFIG_SPI_MASTER)
	404	static int __devinit ad193x_spi_probe(struct spi_device *spi)
	405	{
f0fba2ad LG	406	struct ad193x_priv *ad193x;
	407	int ret;
	408
	409	ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
	410	if (ad193x == NULL)
	411	return -ENOMEM;
	412
	413	spi_set_drvdata(spi, ad193x);
	414	ad193x->control_data = spi;
	415	ad193x->bus_type = SND_SOC_SPI;
	416
	417	ret = snd_soc_register_codec(&spi->dev,
	418	&soc_codec_dev_ad193x, &ad193x_dai, 1);
	419	if (ret < 0)
	420	kfree(ad193x);
	421	return ret;
a1533d94 BS	422	}
	423
	424	static int __devexit ad193x_spi_remove(struct spi_device *spi)
	425	{
f0fba2ad LG	426	snd_soc_unregister_codec(&spi->dev);
	427	kfree(spi_get_drvdata(spi));
	428	return 0;
a1533d94 BS	429	}
	430
	431	static struct spi_driver ad193x_spi_driver = {
	432	.driver = {
f0fba2ad	433	.name = "ad193x-codec",
a1533d94 BS	434	.owner = THIS_MODULE,
	435	},
	436	.probe = ad193x_spi_probe,
	437	.remove = __devexit_p(ad193x_spi_remove),
	438	};
	439	#endif
	440
	441	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	442	static const struct i2c_device_id ad193x_id[] = {
	443	{ "ad1936", 0 },
	444	{ "ad1937", 0 },
	445	{ }
	446	};
	447	MODULE_DEVICE_TABLE(i2c, ad193x_id);
	448
	449	static int __devinit ad193x_i2c_probe(struct i2c_client *client,
	450	const struct i2c_device_id *id)
	451	{
f0fba2ad LG	452	struct ad193x_priv *ad193x;
	453	int ret;
	454
	455	ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
	456	if (ad193x == NULL)
	457	return -ENOMEM;
	458
	459	i2c_set_clientdata(client, ad193x);
	460	ad193x->control_data = client;
	461	ad193x->bus_type = SND_SOC_I2C;
	462
	463	ret = snd_soc_register_codec(&client->dev,
	464	&soc_codec_dev_ad193x, &ad193x_dai, 1);
	465	if (ret < 0)
	466	kfree(ad193x);
	467	return ret;
a1533d94 BS	468	}
	469
	470	static int __devexit ad193x_i2c_remove(struct i2c_client *client)
	471	{
f0fba2ad LG	472	snd_soc_unregister_codec(&client->dev);
	473	kfree(i2c_get_clientdata(client));
	474	return 0;
a1533d94 BS	475	}
	476
	477	static struct i2c_driver ad193x_i2c_driver = {
	478	.driver = {
f0fba2ad	479	.name = "ad193x-codec",
a1533d94 BS	480	},
	481	.probe = ad193x_i2c_probe,
	482	.remove = __devexit_p(ad193x_i2c_remove),
	483	.id_table = ad193x_id,
	484	};
	485	#endif
	486
	487	static int __init ad193x_modinit(void)
	488	{
	489	int ret;
	490
	491	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	492	ret = i2c_add_driver(&ad193x_i2c_driver);
	493	if (ret != 0) {
	494	printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
	495	ret);
	496	}
	497	#endif
	498
	499	#if defined(CONFIG_SPI_MASTER)
	500	ret = spi_register_driver(&ad193x_spi_driver);
	501	if (ret != 0) {
	502	printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
	503	ret);
	504	}
	505	#endif
	506	return ret;
	507	}
	508	module_init(ad193x_modinit);
	509
	510	static void __exit ad193x_modexit(void)
	511	{
	512	#if defined(CONFIG_SPI_MASTER)
	513	spi_unregister_driver(&ad193x_spi_driver);
	514	#endif
	515
	516	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	517	i2c_del_driver(&ad193x_i2c_driver);
	518	#endif
	519	}
	520	module_exit(ad193x_modexit);
	521
	522	MODULE_DESCRIPTION("ASoC ad193x driver");
	523	MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
	524	MODULE_LICENSE("GPL");