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