sound/soc/codecs/ak4104.c - kernel/msm-4.19 - Gitiles

 /*
  * AK4104 ALSA SoC (ASoC) driver
  *
  * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
  *
  *  This program is free software; you can redistribute  it and/or modify it
  *  under the terms of  the GNU General  Public License as published by the
  *  Free Software Foundation;  either version 2 of the  License, or (at your
  *  option) any later version.
  */

 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/spi/spi.h>
 #include <linux/of_device.h>
 #include <linux/of_gpio.h>
 #include <linux/regulator/consumer.h>
 #include <sound/asoundef.h>
 #include <sound/core.h>
 #include <sound/soc.h>
 #include <sound/initval.h>

 /* AK4104 registers addresses */
 #define AK4104_REG_CONTROL1		0x00
 #define AK4104_REG_RESERVED		0x01
 #define AK4104_REG_CONTROL2		0x02
 #define AK4104_REG_TX			0x03
 #define AK4104_REG_CHN_STATUS(x)	((x) + 0x04)
 #define AK4104_NUM_REGS			10

 #define AK4104_REG_MASK			0x1f
 #define AK4104_READ			0xc0
 #define AK4104_WRITE			0xe0
 #define AK4104_RESERVED_VAL		0x5b

 /* Bit masks for AK4104 registers */
 #define AK4104_CONTROL1_RSTN		(1 << 0)
 #define AK4104_CONTROL1_PW		(1 << 1)
 #define AK4104_CONTROL1_DIF0		(1 << 2)
 #define AK4104_CONTROL1_DIF1		(1 << 3)

 #define AK4104_CONTROL2_SEL0		(1 << 0)
 #define AK4104_CONTROL2_SEL1		(1 << 1)
 #define AK4104_CONTROL2_MODE		(1 << 2)

 #define AK4104_TX_TXE			(1 << 0)
 #define AK4104_TX_V			(1 << 1)

 struct ak4104_private {
 	struct regmap *regmap;
 	struct regulator *regulator;
 };

 static const struct snd_soc_dapm_widget ak4104_dapm_widgets[] = {
 SND_SOC_DAPM_PGA("TXE", AK4104_REG_TX, AK4104_TX_TXE, 0, NULL, 0),

 SND_SOC_DAPM_OUTPUT("TX"),
 };

 static const struct snd_soc_dapm_route ak4104_dapm_routes[] = {
 	{ "TXE", NULL, "Playback" },
 	{ "TX", NULL, "TXE" },
 };

 static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai,
 			      unsigned int format)
 {
 	struct snd_soc_codec *codec = codec_dai->codec;
 	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
 	int val = 0;
 	int ret;

 	/* set DAI format */
 	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_RIGHT_J:
 		break;
 	case SND_SOC_DAIFMT_LEFT_J:
 		val |= AK4104_CONTROL1_DIF0;
 		break;
 	case SND_SOC_DAIFMT_I2S:
 		val |= AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1;
 		break;
 	default:
 		dev_err(codec->dev, "invalid dai format\n");
 		return -EINVAL;
 	}

 	/* This device can only be slave */
 	if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
 		return -EINVAL;

 	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
 				 AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1,
 				 val);
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static int ak4104_hw_params(struct snd_pcm_substream *substream,
 			    struct snd_pcm_hw_params *params,
 			    struct snd_soc_dai *dai)
 {
 	struct snd_soc_codec *codec = dai->codec;
 	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
 	int ret, val = 0;

 	/* set the IEC958 bits: consumer mode, no copyright bit */
 	val |= IEC958_AES0_CON_NOT_COPYRIGHT;
 	regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(0), val);

 	val = 0;

 	switch (params_rate(params)) {
 	case 22050:
 		val |= IEC958_AES3_CON_FS_22050;
 		break;
 	case 24000:
 		val |= IEC958_AES3_CON_FS_24000;
 		break;
 	case 32000:
 		val |= IEC958_AES3_CON_FS_32000;
 		break;
 	case 44100:
 		val |= IEC958_AES3_CON_FS_44100;
 		break;
 	case 48000:
 		val |= IEC958_AES3_CON_FS_48000;
 		break;
 	case 88200:
 		val |= IEC958_AES3_CON_FS_88200;
 		break;
 	case 96000:
 		val |= IEC958_AES3_CON_FS_96000;
 		break;
 	case 176400:
 		val |= IEC958_AES3_CON_FS_176400;
 		break;
 	case 192000:
 		val |= IEC958_AES3_CON_FS_192000;
 		break;
 	default:
 		dev_err(codec->dev, "unsupported sampling rate\n");
 		return -EINVAL;
 	}

 	ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val);
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static const struct snd_soc_dai_ops ak4101_dai_ops = {
 	.hw_params = ak4104_hw_params,
 	.set_fmt = ak4104_set_dai_fmt,
 };

 static struct snd_soc_dai_driver ak4104_dai = {
 	.name = "ak4104-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000_192000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE  |
 			   SNDRV_PCM_FMTBIT_S24_3LE |
 			   SNDRV_PCM_FMTBIT_S24_LE
 	},
 	.ops = &ak4101_dai_ops,
 };

 static int ak4104_probe(struct snd_soc_codec *codec)
 {
 	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
 	int ret;

 	ret = regulator_enable(ak4104->regulator);
 	if (ret < 0) {
 		dev_err(codec->dev, "Unable to enable regulator: %d\n", ret);
 		return ret;
 	}

 	/* set power-up and non-reset bits */
 	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
 				 AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN,
 				 AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN);
 	if (ret < 0)
 		goto exit_disable_regulator;

 	/* enable transmitter */
 	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
 				 AK4104_TX_TXE, AK4104_TX_TXE);
 	if (ret < 0)
 		goto exit_disable_regulator;

 	return 0;

 exit_disable_regulator:
 	regulator_disable(ak4104->regulator);
 	return ret;
 }

 static int ak4104_remove(struct snd_soc_codec *codec)
 {
 	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);

 	regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
 			   AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0);
 	regulator_disable(ak4104->regulator);

 	return 0;
 }

 #ifdef CONFIG_PM
 static int ak4104_soc_suspend(struct snd_soc_codec *codec)
 {
 	struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec);

 	regulator_disable(priv->regulator);

 	return 0;
 }

 static int ak4104_soc_resume(struct snd_soc_codec *codec)
 {
 	struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec);
 	int ret;

 	ret = regulator_enable(priv->regulator);
 	if (ret < 0)
 		return ret;

 	return 0;
 }
 #else
 #define ak4104_soc_suspend	NULL
 #define ak4104_soc_resume	NULL
 #endif /* CONFIG_PM */

 static struct snd_soc_codec_driver soc_codec_device_ak4104 = {
 	.probe = ak4104_probe,
 	.remove = ak4104_remove,
 	.suspend = ak4104_soc_suspend,
 	.resume = ak4104_soc_resume,

 	.dapm_widgets = ak4104_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(ak4104_dapm_widgets),
 	.dapm_routes = ak4104_dapm_routes,
 	.num_dapm_routes = ARRAY_SIZE(ak4104_dapm_routes),
 };

 static const struct regmap_config ak4104_regmap = {
 	.reg_bits = 8,
 	.val_bits = 8,

 	.max_register = AK4104_NUM_REGS - 1,
 	.read_flag_mask = AK4104_READ,
 	.write_flag_mask = AK4104_WRITE,

 	.cache_type = REGCACHE_RBTREE,
 };

 static int ak4104_spi_probe(struct spi_device *spi)
 {
 	struct device_node *np = spi->dev.of_node;
 	struct ak4104_private *ak4104;
 	unsigned int val;
 	int ret;

 	spi->bits_per_word = 8;
 	spi->mode = SPI_MODE_0;
 	ret = spi_setup(spi);
 	if (ret < 0)
 		return ret;

 	ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private),
 			      GFP_KERNEL);
 	if (ak4104 == NULL)
 		return -ENOMEM;

 	ak4104->regulator = devm_regulator_get(&spi->dev, "vdd");
 	if (IS_ERR(ak4104->regulator)) {
 		ret = PTR_ERR(ak4104->regulator);
 		dev_err(&spi->dev, "Unable to get Vdd regulator: %d\n", ret);
 		return ret;
 	}

 	ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);
 	if (IS_ERR(ak4104->regmap)) {
 		ret = PTR_ERR(ak4104->regmap);
 		return ret;
 	}

 	if (np) {
 		enum of_gpio_flags flags;
 		int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);

 		if (gpio_is_valid(gpio)) {
 			ret = devm_gpio_request_one(&spi->dev, gpio,
 				     flags & OF_GPIO_ACTIVE_LOW ?
 					GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH,
 				     "ak4104 reset");
 			if (ret < 0)
 				return ret;
 		}
 	}

 	/* read the 'reserved' register - according to the datasheet, it
 	 * should contain 0x5b. Not a good way to verify the presence of
 	 * the device, but there is no hardware ID register. */
 	ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
 	if (ret != 0)
 		return ret;
 	if (val != AK4104_RESERVED_VAL)
 		return -ENODEV;

 	spi_set_drvdata(spi, ak4104);

 	ret = snd_soc_register_codec(&spi->dev,
 			&soc_codec_device_ak4104, &ak4104_dai, 1);
 	return ret;
 }

 static int ak4104_spi_remove(struct spi_device *spi)
 {
 	snd_soc_unregister_codec(&spi->dev);
 	return 0;
 }

 static const struct of_device_id ak4104_of_match[] = {
 	{ .compatible = "asahi-kasei,ak4104", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ak4104_of_match);

 static const struct spi_device_id ak4104_id_table[] = {
 	{ "ak4104", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, ak4104_id_table);

 static struct spi_driver ak4104_spi_driver = {
 	.driver  = {
 		.name   = "ak4104",
 		.of_match_table = ak4104_of_match,
 	},
 	.id_table = ak4104_id_table,
 	.probe  = ak4104_spi_probe,
 	.remove = ak4104_spi_remove,
 };

 module_spi_driver(ak4104_spi_driver);

 MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
 MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver");
 MODULE_LICENSE("GPL");
	/*
	* AK4104 ALSA SoC (ASoC) driver
	*
	* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; either version 2 of the License, or (at your
	* option) any later version.
	*/

	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/spi/spi.h>
	#include <linux/of_device.h>
	#include <linux/of_gpio.h>
	#include <linux/regulator/consumer.h>
	#include <sound/asoundef.h>
	#include <sound/core.h>
	#include <sound/soc.h>
	#include <sound/initval.h>

	/* AK4104 registers addresses */
	#define AK4104_REG_CONTROL1 0x00
	#define AK4104_REG_RESERVED 0x01
	#define AK4104_REG_CONTROL2 0x02
	#define AK4104_REG_TX 0x03
	#define AK4104_REG_CHN_STATUS(x) ((x) + 0x04)
	#define AK4104_NUM_REGS 10

	#define AK4104_REG_MASK 0x1f
	#define AK4104_READ 0xc0
	#define AK4104_WRITE 0xe0
	#define AK4104_RESERVED_VAL 0x5b

	/* Bit masks for AK4104 registers */
	#define AK4104_CONTROL1_RSTN (1 << 0)
	#define AK4104_CONTROL1_PW (1 << 1)
	#define AK4104_CONTROL1_DIF0 (1 << 2)
	#define AK4104_CONTROL1_DIF1 (1 << 3)

	#define AK4104_CONTROL2_SEL0 (1 << 0)
	#define AK4104_CONTROL2_SEL1 (1 << 1)
	#define AK4104_CONTROL2_MODE (1 << 2)

	#define AK4104_TX_TXE (1 << 0)
	#define AK4104_TX_V (1 << 1)

	struct ak4104_private {
	struct regmap *regmap;
	struct regulator *regulator;
	};

	static const struct snd_soc_dapm_widget ak4104_dapm_widgets[] = {
	SND_SOC_DAPM_PGA("TXE", AK4104_REG_TX, AK4104_TX_TXE, 0, NULL, 0),

	SND_SOC_DAPM_OUTPUT("TX"),
	};

	static const struct snd_soc_dapm_route ak4104_dapm_routes[] = {
	{ "TXE", NULL, "Playback" },
	{ "TX", NULL, "TXE" },
	};

	static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai,
	unsigned int format)
	{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
	int val = 0;
	int ret;

	/* set DAI format */
	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_RIGHT_J:
	break;
	case SND_SOC_DAIFMT_LEFT_J:
	val \|= AK4104_CONTROL1_DIF0;
	break;
	case SND_SOC_DAIFMT_I2S:
	val \|= AK4104_CONTROL1_DIF0 \| AK4104_CONTROL1_DIF1;
	break;
	default:
	dev_err(codec->dev, "invalid dai format\n");
	return -EINVAL;
	}

	/* This device can only be slave */
	if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
	return -EINVAL;

	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
	AK4104_CONTROL1_DIF0 \| AK4104_CONTROL1_DIF1,
	val);
	if (ret < 0)
	return ret;

	return 0;
	}

	static int ak4104_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	struct snd_soc_codec *codec = dai->codec;
	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
	int ret, val = 0;

	/* set the IEC958 bits: consumer mode, no copyright bit */
	val \|= IEC958_AES0_CON_NOT_COPYRIGHT;
	regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(0), val);

	val = 0;

	switch (params_rate(params)) {
	case 22050:
	val \|= IEC958_AES3_CON_FS_22050;
	break;
	case 24000:
	val \|= IEC958_AES3_CON_FS_24000;
	break;
	case 32000:
	val \|= IEC958_AES3_CON_FS_32000;
	break;
	case 44100:
	val \|= IEC958_AES3_CON_FS_44100;
	break;
	case 48000:
	val \|= IEC958_AES3_CON_FS_48000;
	break;
	case 88200:
	val \|= IEC958_AES3_CON_FS_88200;
	break;
	case 96000:
	val \|= IEC958_AES3_CON_FS_96000;
	break;
	case 176400:
	val \|= IEC958_AES3_CON_FS_176400;
	break;
	case 192000:
	val \|= IEC958_AES3_CON_FS_192000;
	break;
	default:
	dev_err(codec->dev, "unsupported sampling rate\n");
	return -EINVAL;
	}

	ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val);
	if (ret < 0)
	return ret;

	return 0;
	}

	static const struct snd_soc_dai_ops ak4101_dai_ops = {
	.hw_params = ak4104_hw_params,
	.set_fmt = ak4104_set_dai_fmt,
	};

	static struct snd_soc_dai_driver ak4104_dai = {
	.name = "ak4104-hifi",
	.playback = {
	.stream_name = "Playback",
	.channels_min = 2,
	.channels_max = 2,
	.rates = SNDRV_PCM_RATE_8000_192000,
	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
	SNDRV_PCM_FMTBIT_S24_3LE \|
	SNDRV_PCM_FMTBIT_S24_LE
	},
	.ops = &ak4101_dai_ops,
	};

	static int ak4104_probe(struct snd_soc_codec *codec)
	{
	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
	int ret;

	ret = regulator_enable(ak4104->regulator);
	if (ret < 0) {
	dev_err(codec->dev, "Unable to enable regulator: %d\n", ret);
	return ret;
	}

	/* set power-up and non-reset bits */
	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
	AK4104_CONTROL1_PW \| AK4104_CONTROL1_RSTN,
	AK4104_CONTROL1_PW \| AK4104_CONTROL1_RSTN);
	if (ret < 0)
	goto exit_disable_regulator;

	/* enable transmitter */
	ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
	AK4104_TX_TXE, AK4104_TX_TXE);
	if (ret < 0)
	goto exit_disable_regulator;

	return 0;

	exit_disable_regulator:
	regulator_disable(ak4104->regulator);
	return ret;
	}

	static int ak4104_remove(struct snd_soc_codec *codec)
	{
	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);

	regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
	AK4104_CONTROL1_PW \| AK4104_CONTROL1_RSTN, 0);
	regulator_disable(ak4104->regulator);

	return 0;
	}

	#ifdef CONFIG_PM
	static int ak4104_soc_suspend(struct snd_soc_codec *codec)
	{
	struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec);

	regulator_disable(priv->regulator);

	return 0;
	}

	static int ak4104_soc_resume(struct snd_soc_codec *codec)
	{
	struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec);
	int ret;

	ret = regulator_enable(priv->regulator);
	if (ret < 0)
	return ret;

	return 0;
	}
	#else
	#define ak4104_soc_suspend NULL
	#define ak4104_soc_resume NULL
	#endif /* CONFIG_PM */

	static struct snd_soc_codec_driver soc_codec_device_ak4104 = {
	.probe = ak4104_probe,
	.remove = ak4104_remove,
	.suspend = ak4104_soc_suspend,
	.resume = ak4104_soc_resume,

	.dapm_widgets = ak4104_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(ak4104_dapm_widgets),
	.dapm_routes = ak4104_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(ak4104_dapm_routes),
	};

	static const struct regmap_config ak4104_regmap = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = AK4104_NUM_REGS - 1,
	.read_flag_mask = AK4104_READ,
	.write_flag_mask = AK4104_WRITE,

	.cache_type = REGCACHE_RBTREE,
	};

	static int ak4104_spi_probe(struct spi_device *spi)
	{
	struct device_node *np = spi->dev.of_node;
	struct ak4104_private *ak4104;
	unsigned int val;
	int ret;

	spi->bits_per_word = 8;
	spi->mode = SPI_MODE_0;
	ret = spi_setup(spi);
	if (ret < 0)
	return ret;

	ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private),
	GFP_KERNEL);
	if (ak4104 == NULL)
	return -ENOMEM;

	ak4104->regulator = devm_regulator_get(&spi->dev, "vdd");
	if (IS_ERR(ak4104->regulator)) {
	ret = PTR_ERR(ak4104->regulator);
	dev_err(&spi->dev, "Unable to get Vdd regulator: %d\n", ret);
	return ret;
	}

	ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);
	if (IS_ERR(ak4104->regmap)) {
	ret = PTR_ERR(ak4104->regmap);
	return ret;
	}

	if (np) {
	enum of_gpio_flags flags;
	int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);

	if (gpio_is_valid(gpio)) {
	ret = devm_gpio_request_one(&spi->dev, gpio,
	flags & OF_GPIO_ACTIVE_LOW ?
	GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH,
	"ak4104 reset");
	if (ret < 0)
	return ret;
	}
	}

	/* read the 'reserved' register - according to the datasheet, it
	* should contain 0x5b. Not a good way to verify the presence of
	* the device, but there is no hardware ID register. */
	ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
	if (ret != 0)
	return ret;
	if (val != AK4104_RESERVED_VAL)
	return -ENODEV;

	spi_set_drvdata(spi, ak4104);

	ret = snd_soc_register_codec(&spi->dev,
	&soc_codec_device_ak4104, &ak4104_dai, 1);
	return ret;
	}

	static int ak4104_spi_remove(struct spi_device *spi)
	{
	snd_soc_unregister_codec(&spi->dev);
	return 0;
	}

	static const struct of_device_id ak4104_of_match[] = {
	{ .compatible = "asahi-kasei,ak4104", },
	{ }
	};
	MODULE_DEVICE_TABLE(of, ak4104_of_match);

	static const struct spi_device_id ak4104_id_table[] = {
	{ "ak4104", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(spi, ak4104_id_table);

	static struct spi_driver ak4104_spi_driver = {
	.driver = {
	.name = "ak4104",
	.of_match_table = ak4104_of_match,
	},
	.id_table = ak4104_id_table,
	.probe = ak4104_spi_probe,
	.remove = ak4104_spi_remove,
	};

	module_spi_driver(ak4104_spi_driver);

	MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
	MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver");
	MODULE_LICENSE("GPL");