drivers/media/video/imx074.c - kernel/mindspeed - Git at Google

 /*
  * Driver for IMX074 CMOS Image Sensor from Sony
  *
  * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
  *
  * Partially inspired by the IMX074 driver from the Android / MSM tree
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */

 #include <linux/delay.h>
 #include <linux/i2c.h>
 #include <linux/v4l2-mediabus.h>
 #include <linux/slab.h>
 #include <linux/videodev2.h>
 #include <linux/module.h>

 #include <media/soc_camera.h>
 #include <media/v4l2-subdev.h>
 #include <media/v4l2-chip-ident.h>

 /* IMX074 registers */

 #define MODE_SELECT			0x0100
 #define IMAGE_ORIENTATION		0x0101
 #define GROUPED_PARAMETER_HOLD		0x0104

 /* Integration Time */
 #define COARSE_INTEGRATION_TIME_HI	0x0202
 #define COARSE_INTEGRATION_TIME_LO	0x0203
 /* Gain */
 #define ANALOGUE_GAIN_CODE_GLOBAL_HI	0x0204
 #define ANALOGUE_GAIN_CODE_GLOBAL_LO	0x0205

 /* PLL registers */
 #define PRE_PLL_CLK_DIV			0x0305
 #define PLL_MULTIPLIER			0x0307
 #define PLSTATIM			0x302b
 #define VNDMY_ABLMGSHLMT		0x300a
 #define Y_OPBADDR_START_DI		0x3014
 /* mode setting */
 #define FRAME_LENGTH_LINES_HI		0x0340
 #define FRAME_LENGTH_LINES_LO		0x0341
 #define LINE_LENGTH_PCK_HI		0x0342
 #define LINE_LENGTH_PCK_LO		0x0343
 #define YADDR_START			0x0347
 #define YADDR_END			0x034b
 #define X_OUTPUT_SIZE_MSB		0x034c
 #define X_OUTPUT_SIZE_LSB		0x034d
 #define Y_OUTPUT_SIZE_MSB		0x034e
 #define Y_OUTPUT_SIZE_LSB		0x034f
 #define X_EVEN_INC			0x0381
 #define X_ODD_INC			0x0383
 #define Y_EVEN_INC			0x0385
 #define Y_ODD_INC			0x0387

 #define HMODEADD			0x3001
 #define VMODEADD			0x3016
 #define VAPPLINE_START			0x3069
 #define VAPPLINE_END			0x306b
 #define SHUTTER				0x3086
 #define HADDAVE				0x30e8
 #define LANESEL				0x3301

 /* IMX074 supported geometry */
 #define IMX074_WIDTH			1052
 #define IMX074_HEIGHT			780

 /* IMX074 has only one fixed colorspace per pixelcode */
 struct imx074_datafmt {
 	enum v4l2_mbus_pixelcode	code;
 	enum v4l2_colorspace		colorspace;
 };

 struct imx074 {
 	struct v4l2_subdev		subdev;
 	const struct imx074_datafmt	*fmt;
 };

 static const struct imx074_datafmt imx074_colour_fmts[] = {
 	{V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
 };

 static struct imx074 *to_imx074(const struct i2c_client *client)
 {
 	return container_of(i2c_get_clientdata(client), struct imx074, subdev);
 }

 /* Find a data format by a pixel code in an array */
 static const struct imx074_datafmt *imx074_find_datafmt(enum v4l2_mbus_pixelcode code)
 {
 	int i;

 	for (i = 0; i < ARRAY_SIZE(imx074_colour_fmts); i++)
 		if (imx074_colour_fmts[i].code == code)
 			return imx074_colour_fmts + i;

 	return NULL;
 }

 static int reg_write(struct i2c_client *client, const u16 addr, const u8 data)
 {
 	struct i2c_adapter *adap = client->adapter;
 	struct i2c_msg msg;
 	unsigned char tx[3];
 	int ret;

 	msg.addr = client->addr;
 	msg.buf = tx;
 	msg.len = 3;
 	msg.flags = 0;

 	tx[0] = addr >> 8;
 	tx[1] = addr & 0xff;
 	tx[2] = data;

 	ret = i2c_transfer(adap, &msg, 1);

 	mdelay(2);

 	return ret == 1 ? 0 : -EIO;
 }

 static int reg_read(struct i2c_client *client, const u16 addr)
 {
 	u8 buf[2] = {addr >> 8, addr & 0xff};
 	int ret;
 	struct i2c_msg msgs[] = {
 		{
 			.addr  = client->addr,
 			.flags = 0,
 			.len   = 2,
 			.buf   = buf,
 		}, {
 			.addr  = client->addr,
 			.flags = I2C_M_RD,
 			.len   = 2,
 			.buf   = buf,
 		},
 	};

 	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 	if (ret < 0) {
 		dev_warn(&client->dev, "Reading register %x from %x failed\n",
 			 addr, client->addr);
 		return ret;
 	}

 	return buf[0] & 0xff; /* no sign-extension */
 }

 static int imx074_try_fmt(struct v4l2_subdev *sd,
 			  struct v4l2_mbus_framefmt *mf)
 {
 	const struct imx074_datafmt *fmt = imx074_find_datafmt(mf->code);

 	dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);

 	if (!fmt) {
 		mf->code	= imx074_colour_fmts[0].code;
 		mf->colorspace	= imx074_colour_fmts[0].colorspace;
 	}

 	mf->width	= IMX074_WIDTH;
 	mf->height	= IMX074_HEIGHT;
 	mf->field	= V4L2_FIELD_NONE;

 	return 0;
 }

 static int imx074_s_fmt(struct v4l2_subdev *sd,
 			struct v4l2_mbus_framefmt *mf)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	struct imx074 *priv = to_imx074(client);

 	dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);

 	/* MIPI CSI could have changed the format, double-check */
 	if (!imx074_find_datafmt(mf->code))
 		return -EINVAL;

 	imx074_try_fmt(sd, mf);

 	priv->fmt = imx074_find_datafmt(mf->code);

 	return 0;
 }

 static int imx074_g_fmt(struct v4l2_subdev *sd,
 			struct v4l2_mbus_framefmt *mf)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	struct imx074 *priv = to_imx074(client);

 	const struct imx074_datafmt *fmt = priv->fmt;

 	mf->code	= fmt->code;
 	mf->colorspace	= fmt->colorspace;
 	mf->width	= IMX074_WIDTH;
 	mf->height	= IMX074_HEIGHT;
 	mf->field	= V4L2_FIELD_NONE;

 	return 0;
 }

 static int imx074_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 {
 	struct v4l2_rect *rect = &a->c;

 	a->type		= V4L2_BUF_TYPE_VIDEO_CAPTURE;
 	rect->top	= 0;
 	rect->left	= 0;
 	rect->width	= IMX074_WIDTH;
 	rect->height	= IMX074_HEIGHT;

 	return 0;
 }

 static int imx074_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 {
 	a->bounds.left			= 0;
 	a->bounds.top			= 0;
 	a->bounds.width			= IMX074_WIDTH;
 	a->bounds.height		= IMX074_HEIGHT;
 	a->defrect			= a->bounds;
 	a->type				= V4L2_BUF_TYPE_VIDEO_CAPTURE;
 	a->pixelaspect.numerator	= 1;
 	a->pixelaspect.denominator	= 1;

 	return 0;
 }

 static int imx074_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 			   enum v4l2_mbus_pixelcode *code)
 {
 	if ((unsigned int)index >= ARRAY_SIZE(imx074_colour_fmts))
 		return -EINVAL;

 	*code = imx074_colour_fmts[index].code;
 	return 0;
 }

 static int imx074_s_stream(struct v4l2_subdev *sd, int enable)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);

 	/* MODE_SELECT: stream or standby */
 	return reg_write(client, MODE_SELECT, !!enable);
 }

 static int imx074_g_chip_ident(struct v4l2_subdev *sd,
 			       struct v4l2_dbg_chip_ident *id)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);

 	if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
 		return -EINVAL;

 	if (id->match.addr != client->addr)
 		return -ENODEV;

 	id->ident	= V4L2_IDENT_IMX074;
 	id->revision	= 0;

 	return 0;
 }

 static int imx074_g_mbus_config(struct v4l2_subdev *sd,
 				struct v4l2_mbus_config *cfg)
 {
 	cfg->type = V4L2_MBUS_CSI2;
 	cfg->flags = V4L2_MBUS_CSI2_2_LANE |
 		V4L2_MBUS_CSI2_CHANNEL_0 |
 		V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;

 	return 0;
 }

 static struct v4l2_subdev_video_ops imx074_subdev_video_ops = {
 	.s_stream	= imx074_s_stream,
 	.s_mbus_fmt	= imx074_s_fmt,
 	.g_mbus_fmt	= imx074_g_fmt,
 	.try_mbus_fmt	= imx074_try_fmt,
 	.enum_mbus_fmt	= imx074_enum_fmt,
 	.g_crop		= imx074_g_crop,
 	.cropcap	= imx074_cropcap,
 	.g_mbus_config	= imx074_g_mbus_config,
 };

 static struct v4l2_subdev_core_ops imx074_subdev_core_ops = {
 	.g_chip_ident	= imx074_g_chip_ident,
 };

 static struct v4l2_subdev_ops imx074_subdev_ops = {
 	.core	= &imx074_subdev_core_ops,
 	.video	= &imx074_subdev_video_ops,
 };

 static int imx074_video_probe(struct i2c_client *client)
 {
 	int ret;
 	u16 id;

 	/* Read sensor Model ID */
 	ret = reg_read(client, 0);
 	if (ret < 0)
 		return ret;

 	id = ret << 8;

 	ret = reg_read(client, 1);
 	if (ret < 0)
 		return ret;

 	id |= ret;

 	dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);

 	if (id != 0x74)
 		return -ENODEV;

 	/* PLL Setting EXTCLK=24MHz, 22.5times */
 	reg_write(client, PLL_MULTIPLIER, 0x2D);
 	reg_write(client, PRE_PLL_CLK_DIV, 0x02);
 	reg_write(client, PLSTATIM, 0x4B);

 	/* 2-lane mode */
 	reg_write(client, 0x3024, 0x00);

 	reg_write(client, IMAGE_ORIENTATION, 0x00);

 	/* select RAW mode:
 	 * 0x08+0x08 = top 8 bits
 	 * 0x0a+0x08 = compressed 8-bits
 	 * 0x0a+0x0a = 10 bits
 	 */
 	reg_write(client, 0x0112, 0x08);
 	reg_write(client, 0x0113, 0x08);

 	/* Base setting for High frame mode */
 	reg_write(client, VNDMY_ABLMGSHLMT, 0x80);
 	reg_write(client, Y_OPBADDR_START_DI, 0x08);
 	reg_write(client, 0x3015, 0x37);
 	reg_write(client, 0x301C, 0x01);
 	reg_write(client, 0x302C, 0x05);
 	reg_write(client, 0x3031, 0x26);
 	reg_write(client, 0x3041, 0x60);
 	reg_write(client, 0x3051, 0x24);
 	reg_write(client, 0x3053, 0x34);
 	reg_write(client, 0x3057, 0xC0);
 	reg_write(client, 0x305C, 0x09);
 	reg_write(client, 0x305D, 0x07);
 	reg_write(client, 0x3060, 0x30);
 	reg_write(client, 0x3065, 0x00);
 	reg_write(client, 0x30AA, 0x08);
 	reg_write(client, 0x30AB, 0x1C);
 	reg_write(client, 0x30B0, 0x32);
 	reg_write(client, 0x30B2, 0x83);
 	reg_write(client, 0x30D3, 0x04);
 	reg_write(client, 0x3106, 0x78);
 	reg_write(client, 0x310C, 0x82);
 	reg_write(client, 0x3304, 0x05);
 	reg_write(client, 0x3305, 0x04);
 	reg_write(client, 0x3306, 0x11);
 	reg_write(client, 0x3307, 0x02);
 	reg_write(client, 0x3308, 0x0C);
 	reg_write(client, 0x3309, 0x06);
 	reg_write(client, 0x330A, 0x08);
 	reg_write(client, 0x330B, 0x04);
 	reg_write(client, 0x330C, 0x08);
 	reg_write(client, 0x330D, 0x06);
 	reg_write(client, 0x330E, 0x01);
 	reg_write(client, 0x3381, 0x00);

 	/* V : 1/2V-addition (1,3), H : 1/2H-averaging (1,3) -> Full HD */
 	/* 1608 = 1560 + 48 (black lines) */
 	reg_write(client, FRAME_LENGTH_LINES_HI, 0x06);
 	reg_write(client, FRAME_LENGTH_LINES_LO, 0x48);
 	reg_write(client, YADDR_START, 0x00);
 	reg_write(client, YADDR_END, 0x2F);
 	/* 0x838 == 2104 */
 	reg_write(client, X_OUTPUT_SIZE_MSB, 0x08);
 	reg_write(client, X_OUTPUT_SIZE_LSB, 0x38);
 	/* 0x618 == 1560 */
 	reg_write(client, Y_OUTPUT_SIZE_MSB, 0x06);
 	reg_write(client, Y_OUTPUT_SIZE_LSB, 0x18);
 	reg_write(client, X_EVEN_INC, 0x01);
 	reg_write(client, X_ODD_INC, 0x03);
 	reg_write(client, Y_EVEN_INC, 0x01);
 	reg_write(client, Y_ODD_INC, 0x03);
 	reg_write(client, HMODEADD, 0x00);
 	reg_write(client, VMODEADD, 0x16);
 	reg_write(client, VAPPLINE_START, 0x24);
 	reg_write(client, VAPPLINE_END, 0x53);
 	reg_write(client, SHUTTER, 0x00);
 	reg_write(client, HADDAVE, 0x80);

 	reg_write(client, LANESEL, 0x00);

 	reg_write(client, GROUPED_PARAMETER_HOLD, 0x00);	/* off */

 	return 0;
 }

 static int imx074_probe(struct i2c_client *client,
 			const struct i2c_device_id *did)
 {
 	struct imx074 *priv;
 	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
 	struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 	int ret;

 	if (!icl) {
 		dev_err(&client->dev, "IMX074: missing platform data!\n");
 		return -EINVAL;
 	}

 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 		dev_warn(&adapter->dev,
 			 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
 		return -EIO;
 	}

 	priv = kzalloc(sizeof(struct imx074), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	v4l2_i2c_subdev_init(&priv->subdev, client, &imx074_subdev_ops);

 	priv->fmt	= &imx074_colour_fmts[0];

 	ret = imx074_video_probe(client);
 	if (ret < 0) {
 		kfree(priv);
 		return ret;
 	}

 	return ret;
 }

 static int imx074_remove(struct i2c_client *client)
 {
 	struct imx074 *priv = to_imx074(client);
 	struct soc_camera_link *icl = soc_camera_i2c_to_link(client);

 	if (icl->free_bus)
 		icl->free_bus(icl);
 	kfree(priv);

 	return 0;
 }

 static const struct i2c_device_id imx074_id[] = {
 	{ "imx074", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, imx074_id);

 static struct i2c_driver imx074_i2c_driver = {
 	.driver = {
 		.name = "imx074",
 	},
 	.probe		= imx074_probe,
 	.remove		= imx074_remove,
 	.id_table	= imx074_id,
 };

 static int __init imx074_mod_init(void)
 {
 	return i2c_add_driver(&imx074_i2c_driver);
 }

 static void __exit imx074_mod_exit(void)
 {
 	i2c_del_driver(&imx074_i2c_driver);
 }

 module_init(imx074_mod_init);
 module_exit(imx074_mod_exit);

 MODULE_DESCRIPTION("Sony IMX074 Camera driver");
 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
 MODULE_LICENSE("GPL v2");
	/*
	* Driver for IMX074 CMOS Image Sensor from Sony
	*
	* Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
	*
	* Partially inspired by the IMX074 driver from the Android / MSM tree
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/

	#include <linux/delay.h>
	#include <linux/i2c.h>
	#include <linux/v4l2-mediabus.h>
	#include <linux/slab.h>
	#include <linux/videodev2.h>
	#include <linux/module.h>

	#include <media/soc_camera.h>
	#include <media/v4l2-subdev.h>
	#include <media/v4l2-chip-ident.h>

	/* IMX074 registers */

	#define MODE_SELECT 0x0100
	#define IMAGE_ORIENTATION 0x0101
	#define GROUPED_PARAMETER_HOLD 0x0104

	/* Integration Time */
	#define COARSE_INTEGRATION_TIME_HI 0x0202
	#define COARSE_INTEGRATION_TIME_LO 0x0203
	/* Gain */
	#define ANALOGUE_GAIN_CODE_GLOBAL_HI 0x0204
	#define ANALOGUE_GAIN_CODE_GLOBAL_LO 0x0205

	/* PLL registers */
	#define PRE_PLL_CLK_DIV 0x0305
	#define PLL_MULTIPLIER 0x0307
	#define PLSTATIM 0x302b
	#define VNDMY_ABLMGSHLMT 0x300a
	#define Y_OPBADDR_START_DI 0x3014
	/* mode setting */
	#define FRAME_LENGTH_LINES_HI 0x0340
	#define FRAME_LENGTH_LINES_LO 0x0341
	#define LINE_LENGTH_PCK_HI 0x0342
	#define LINE_LENGTH_PCK_LO 0x0343
	#define YADDR_START 0x0347
	#define YADDR_END 0x034b
	#define X_OUTPUT_SIZE_MSB 0x034c
	#define X_OUTPUT_SIZE_LSB 0x034d
	#define Y_OUTPUT_SIZE_MSB 0x034e
	#define Y_OUTPUT_SIZE_LSB 0x034f
	#define X_EVEN_INC 0x0381
	#define X_ODD_INC 0x0383
	#define Y_EVEN_INC 0x0385
	#define Y_ODD_INC 0x0387

	#define HMODEADD 0x3001
	#define VMODEADD 0x3016
	#define VAPPLINE_START 0x3069
	#define VAPPLINE_END 0x306b
	#define SHUTTER 0x3086
	#define HADDAVE 0x30e8
	#define LANESEL 0x3301

	/* IMX074 supported geometry */
	#define IMX074_WIDTH 1052
	#define IMX074_HEIGHT 780

	/* IMX074 has only one fixed colorspace per pixelcode */
	struct imx074_datafmt {
	enum v4l2_mbus_pixelcode code;
	enum v4l2_colorspace colorspace;
	};

	struct imx074 {
	struct v4l2_subdev subdev;
	const struct imx074_datafmt *fmt;
	};

	static const struct imx074_datafmt imx074_colour_fmts[] = {
	{V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
	};

	static struct imx074 to_imx074(const struct i2c_client client)
	{
	return container_of(i2c_get_clientdata(client), struct imx074, subdev);
	}

	/* Find a data format by a pixel code in an array */
	static const struct imx074_datafmt *imx074_find_datafmt(enum v4l2_mbus_pixelcode code)
	{
	int i;

	for (i = 0; i < ARRAY_SIZE(imx074_colour_fmts); i++)
	if (imx074_colour_fmts[i].code == code)
	return imx074_colour_fmts + i;

	return NULL;
	}

	static int reg_write(struct i2c_client *client, const u16 addr, const u8 data)
	{
	struct i2c_adapter *adap = client->adapter;
	struct i2c_msg msg;
	unsigned char tx[3];
	int ret;

	msg.addr = client->addr;
	msg.buf = tx;
	msg.len = 3;
	msg.flags = 0;

	tx[0] = addr >> 8;
	tx[1] = addr & 0xff;
	tx[2] = data;

	ret = i2c_transfer(adap, &msg, 1);

	mdelay(2);

	return ret == 1 ? 0 : -EIO;
	}

	static int reg_read(struct i2c_client *client, const u16 addr)
	{
	u8 buf[2] = {addr >> 8, addr & 0xff};
	int ret;
	struct i2c_msg msgs[] = {
	{
	.addr = client->addr,
	.flags = 0,
	.len = 2,
	.buf = buf,
	}, {
	.addr = client->addr,
	.flags = I2C_M_RD,
	.len = 2,
	.buf = buf,
	},
	};

	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
	if (ret < 0) {
	dev_warn(&client->dev, "Reading register %x from %x failed\n",
	addr, client->addr);
	return ret;
	}

	return buf[0] & 0xff; /* no sign-extension */
	}

	static int imx074_try_fmt(struct v4l2_subdev *sd,
	struct v4l2_mbus_framefmt *mf)
	{
	const struct imx074_datafmt *fmt = imx074_find_datafmt(mf->code);

	dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);

	if (!fmt) {
	mf->code = imx074_colour_fmts[0].code;
	mf->colorspace = imx074_colour_fmts[0].colorspace;
	}

	mf->width = IMX074_WIDTH;
	mf->height = IMX074_HEIGHT;
	mf->field = V4L2_FIELD_NONE;

	return 0;
	}

	static int imx074_s_fmt(struct v4l2_subdev *sd,
	struct v4l2_mbus_framefmt *mf)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct imx074 *priv = to_imx074(client);

	dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);

	/* MIPI CSI could have changed the format, double-check */
	if (!imx074_find_datafmt(mf->code))
	return -EINVAL;

	imx074_try_fmt(sd, mf);

	priv->fmt = imx074_find_datafmt(mf->code);

	return 0;
	}

	static int imx074_g_fmt(struct v4l2_subdev *sd,
	struct v4l2_mbus_framefmt *mf)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct imx074 *priv = to_imx074(client);

	const struct imx074_datafmt *fmt = priv->fmt;

	mf->code = fmt->code;
	mf->colorspace = fmt->colorspace;
	mf->width = IMX074_WIDTH;
	mf->height = IMX074_HEIGHT;
	mf->field = V4L2_FIELD_NONE;

	return 0;
	}

	static int imx074_g_crop(struct v4l2_subdev sd, struct v4l2_crop a)
	{
	struct v4l2_rect *rect = &a->c;

	a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	rect->top = 0;
	rect->left = 0;
	rect->width = IMX074_WIDTH;
	rect->height = IMX074_HEIGHT;

	return 0;
	}

	static int imx074_cropcap(struct v4l2_subdev sd, struct v4l2_cropcap a)
	{
	a->bounds.left = 0;
	a->bounds.top = 0;
	a->bounds.width = IMX074_WIDTH;
	a->bounds.height = IMX074_HEIGHT;
	a->defrect = a->bounds;
	a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	a->pixelaspect.numerator = 1;
	a->pixelaspect.denominator = 1;

	return 0;
	}

	static int imx074_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
	enum v4l2_mbus_pixelcode *code)
	{
	if ((unsigned int)index >= ARRAY_SIZE(imx074_colour_fmts))
	return -EINVAL;

	*code = imx074_colour_fmts[index].code;
	return 0;
	}

	static int imx074_s_stream(struct v4l2_subdev *sd, int enable)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	/* MODE_SELECT: stream or standby */
	return reg_write(client, MODE_SELECT, !!enable);
	}

	static int imx074_g_chip_ident(struct v4l2_subdev *sd,
	struct v4l2_dbg_chip_ident *id)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
	return -EINVAL;

	if (id->match.addr != client->addr)
	return -ENODEV;

	id->ident = V4L2_IDENT_IMX074;
	id->revision = 0;

	return 0;
	}

	static int imx074_g_mbus_config(struct v4l2_subdev *sd,
	struct v4l2_mbus_config *cfg)
	{
	cfg->type = V4L2_MBUS_CSI2;
	cfg->flags = V4L2_MBUS_CSI2_2_LANE \|
	V4L2_MBUS_CSI2_CHANNEL_0 \|
	V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;

	return 0;
	}

	static struct v4l2_subdev_video_ops imx074_subdev_video_ops = {
	.s_stream = imx074_s_stream,
	.s_mbus_fmt = imx074_s_fmt,
	.g_mbus_fmt = imx074_g_fmt,
	.try_mbus_fmt = imx074_try_fmt,
	.enum_mbus_fmt = imx074_enum_fmt,
	.g_crop = imx074_g_crop,
	.cropcap = imx074_cropcap,
	.g_mbus_config = imx074_g_mbus_config,
	};

	static struct v4l2_subdev_core_ops imx074_subdev_core_ops = {
	.g_chip_ident = imx074_g_chip_ident,
	};

	static struct v4l2_subdev_ops imx074_subdev_ops = {
	.core = &imx074_subdev_core_ops,
	.video = &imx074_subdev_video_ops,
	};

	static int imx074_video_probe(struct i2c_client *client)
	{
	int ret;
	u16 id;

	/* Read sensor Model ID */
	ret = reg_read(client, 0);
	if (ret < 0)
	return ret;

	id = ret << 8;

	ret = reg_read(client, 1);
	if (ret < 0)
	return ret;

	id \|= ret;

	dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);

	if (id != 0x74)
	return -ENODEV;

	/* PLL Setting EXTCLK=24MHz, 22.5times */
	reg_write(client, PLL_MULTIPLIER, 0x2D);
	reg_write(client, PRE_PLL_CLK_DIV, 0x02);
	reg_write(client, PLSTATIM, 0x4B);

	/* 2-lane mode */
	reg_write(client, 0x3024, 0x00);

	reg_write(client, IMAGE_ORIENTATION, 0x00);

	/* select RAW mode:
	* 0x08+0x08 = top 8 bits
	* 0x0a+0x08 = compressed 8-bits
	* 0x0a+0x0a = 10 bits
	*/
	reg_write(client, 0x0112, 0x08);
	reg_write(client, 0x0113, 0x08);

	/* Base setting for High frame mode */
	reg_write(client, VNDMY_ABLMGSHLMT, 0x80);
	reg_write(client, Y_OPBADDR_START_DI, 0x08);
	reg_write(client, 0x3015, 0x37);
	reg_write(client, 0x301C, 0x01);
	reg_write(client, 0x302C, 0x05);
	reg_write(client, 0x3031, 0x26);
	reg_write(client, 0x3041, 0x60);
	reg_write(client, 0x3051, 0x24);
	reg_write(client, 0x3053, 0x34);
	reg_write(client, 0x3057, 0xC0);
	reg_write(client, 0x305C, 0x09);
	reg_write(client, 0x305D, 0x07);
	reg_write(client, 0x3060, 0x30);
	reg_write(client, 0x3065, 0x00);
	reg_write(client, 0x30AA, 0x08);
	reg_write(client, 0x30AB, 0x1C);
	reg_write(client, 0x30B0, 0x32);
	reg_write(client, 0x30B2, 0x83);
	reg_write(client, 0x30D3, 0x04);
	reg_write(client, 0x3106, 0x78);
	reg_write(client, 0x310C, 0x82);
	reg_write(client, 0x3304, 0x05);
	reg_write(client, 0x3305, 0x04);
	reg_write(client, 0x3306, 0x11);
	reg_write(client, 0x3307, 0x02);
	reg_write(client, 0x3308, 0x0C);
	reg_write(client, 0x3309, 0x06);
	reg_write(client, 0x330A, 0x08);
	reg_write(client, 0x330B, 0x04);
	reg_write(client, 0x330C, 0x08);
	reg_write(client, 0x330D, 0x06);
	reg_write(client, 0x330E, 0x01);
	reg_write(client, 0x3381, 0x00);

	/* V : 1/2V-addition (1,3), H : 1/2H-averaging (1,3) -> Full HD */
	/* 1608 = 1560 + 48 (black lines) */
	reg_write(client, FRAME_LENGTH_LINES_HI, 0x06);
	reg_write(client, FRAME_LENGTH_LINES_LO, 0x48);
	reg_write(client, YADDR_START, 0x00);
	reg_write(client, YADDR_END, 0x2F);
	/* 0x838 == 2104 */
	reg_write(client, X_OUTPUT_SIZE_MSB, 0x08);
	reg_write(client, X_OUTPUT_SIZE_LSB, 0x38);
	/* 0x618 == 1560 */
	reg_write(client, Y_OUTPUT_SIZE_MSB, 0x06);
	reg_write(client, Y_OUTPUT_SIZE_LSB, 0x18);
	reg_write(client, X_EVEN_INC, 0x01);
	reg_write(client, X_ODD_INC, 0x03);
	reg_write(client, Y_EVEN_INC, 0x01);
	reg_write(client, Y_ODD_INC, 0x03);
	reg_write(client, HMODEADD, 0x00);
	reg_write(client, VMODEADD, 0x16);
	reg_write(client, VAPPLINE_START, 0x24);
	reg_write(client, VAPPLINE_END, 0x53);
	reg_write(client, SHUTTER, 0x00);
	reg_write(client, HADDAVE, 0x80);

	reg_write(client, LANESEL, 0x00);

	reg_write(client, GROUPED_PARAMETER_HOLD, 0x00); /* off */

	return 0;
	}

	static int imx074_probe(struct i2c_client *client,
	const struct i2c_device_id *did)
	{
	struct imx074 *priv;
	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
	struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
	int ret;

	if (!icl) {
	dev_err(&client->dev, "IMX074: missing platform data!\n");
	return -EINVAL;
	}

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
	dev_warn(&adapter->dev,
	"I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
	return -EIO;
	}

	priv = kzalloc(sizeof(struct imx074), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	v4l2_i2c_subdev_init(&priv->subdev, client, &imx074_subdev_ops);

	priv->fmt = &imx074_colour_fmts[0];

	ret = imx074_video_probe(client);
	if (ret < 0) {
	kfree(priv);
	return ret;
	}

	return ret;
	}

	static int imx074_remove(struct i2c_client *client)
	{
	struct imx074 *priv = to_imx074(client);
	struct soc_camera_link *icl = soc_camera_i2c_to_link(client);

	if (icl->free_bus)
	icl->free_bus(icl);
	kfree(priv);

	return 0;
	}

	static const struct i2c_device_id imx074_id[] = {
	{ "imx074", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, imx074_id);

	static struct i2c_driver imx074_i2c_driver = {
	.driver = {
	.name = "imx074",
	},
	.probe = imx074_probe,
	.remove = imx074_remove,
	.id_table = imx074_id,
	};

	static int __init imx074_mod_init(void)
	{
	return i2c_add_driver(&imx074_i2c_driver);
	}

	static void __exit imx074_mod_exit(void)
	{
	i2c_del_driver(&imx074_i2c_driver);
	}

	module_init(imx074_mod_init);
	module_exit(imx074_mod_exit);

	MODULE_DESCRIPTION("Sony IMX074 Camera driver");
	MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
	MODULE_LICENSE("GPL v2");