drivers/media/video/gspca/m5602/m5602_ov9650.c - kernel/msm-4.9 - Gitiles

 /*
  * Driver for the ov9650 sensor
  *
  * Copyright (C) 2008 Erik Andrén
  * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
  * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
  *
  * Portions of code to USB interface and ALi driver software,
  * Copyright (c) 2006 Willem Duinker
  * v4l2 interface modeled after the V4L2 driver
  * for SN9C10x PC Camera Controllers
  *
  * 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, version 2.
  *
  */

 #include "m5602_ov9650.h"

 /* Vertically and horizontally flips the image if matched, needed for machines
    where the sensor is mounted upside down */
 static
     const
 	struct dmi_system_id ov9650_flip_dmi_table[] = {
 	{
 		.ident = "ASUS A6VC",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 			DMI_MATCH(DMI_PRODUCT_NAME, "A6VC")
 		}
 	},
 	{
 		.ident = "ASUS A6VM",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 			DMI_MATCH(DMI_PRODUCT_NAME, "A6VM")
 		}
 	},
 	{
 		.ident = "ASUS A6JC",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 			DMI_MATCH(DMI_PRODUCT_NAME, "A6JC")
 		}
 	},
 	{
 		.ident = "ASUS A6Ja",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 			DMI_MATCH(DMI_PRODUCT_NAME, "A6J")
 		}
 	},
 	{
 		.ident = "ASUS A6Kt",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 			DMI_MATCH(DMI_PRODUCT_NAME, "A6Kt")
 		}
 	},
 	{
 		.ident = "Alienware Aurora m9700",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "alienware"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "Aurora m9700")
 		}
 	},
 	{}
 };

 const static struct ctrl ov9650_ctrls[] = {
 #define EXPOSURE_IDX 0
 	{
 		{
 			.id		= V4L2_CID_EXPOSURE,
 			.type		= V4L2_CTRL_TYPE_INTEGER,
 			.name		= "exposure",
 			.minimum	= 0x00,
 			.maximum	= 0x1ff,
 			.step		= 0x4,
 			.default_value 	= EXPOSURE_DEFAULT,
 			.flags         	= V4L2_CTRL_FLAG_SLIDER
 		},
 		.set = ov9650_set_exposure,
 		.get = ov9650_get_exposure
 	},
 #define GAIN_IDX 1
 	{
 		{
 			.id		= V4L2_CID_GAIN,
 			.type		= V4L2_CTRL_TYPE_INTEGER,
 			.name		= "gain",
 			.minimum	= 0x00,
 			.maximum	= 0x3ff,
 			.step		= 0x1,
 			.default_value	= GAIN_DEFAULT,
 			.flags		= V4L2_CTRL_FLAG_SLIDER
 		},
 		.set = ov9650_set_gain,
 		.get = ov9650_get_gain
 	},
 #define RED_BALANCE_IDX 2
 	{
 		{
 			.type 		= V4L2_CTRL_TYPE_INTEGER,
 			.name 		= "red balance",
 			.minimum 	= 0x00,
 			.maximum 	= 0xff,
 			.step 		= 0x1,
 			.default_value 	= RED_GAIN_DEFAULT,
 			.flags         	= V4L2_CTRL_FLAG_SLIDER
 		},
 		.set = ov9650_set_red_balance,
 		.get = ov9650_get_red_balance
 	},
 #define BLUE_BALANCE_IDX 3
 	{
 		{
 			.type 		= V4L2_CTRL_TYPE_INTEGER,
 			.name 		= "blue balance",
 			.minimum 	= 0x00,
 			.maximum 	= 0xff,
 			.step 		= 0x1,
 			.default_value 	= BLUE_GAIN_DEFAULT,
 			.flags         	= V4L2_CTRL_FLAG_SLIDER
 		},
 		.set = ov9650_set_blue_balance,
 		.get = ov9650_get_blue_balance
 	},
 #define HFLIP_IDX 4
 	{
 		{
 			.id 		= V4L2_CID_HFLIP,
 			.type 		= V4L2_CTRL_TYPE_BOOLEAN,
 			.name 		= "horizontal flip",
 			.minimum 	= 0,
 			.maximum 	= 1,
 			.step 		= 1,
 			.default_value 	= 0
 		},
 		.set = ov9650_set_hflip,
 		.get = ov9650_get_hflip
 	},
 #define VFLIP_IDX 5
 	{
 		{
 			.id 		= V4L2_CID_VFLIP,
 			.type 		= V4L2_CTRL_TYPE_BOOLEAN,
 			.name 		= "vertical flip",
 			.minimum 	= 0,
 			.maximum 	= 1,
 			.step 		= 1,
 			.default_value 	= 0
 		},
 		.set = ov9650_set_vflip,
 		.get = ov9650_get_vflip
 	},
 #define AUTO_WHITE_BALANCE_IDX 6
 	{
 		{
 			.id 		= V4L2_CID_AUTO_WHITE_BALANCE,
 			.type 		= V4L2_CTRL_TYPE_BOOLEAN,
 			.name 		= "auto white balance",
 			.minimum 	= 0,
 			.maximum 	= 1,
 			.step 		= 1,
 			.default_value 	= 1
 		},
 		.set = ov9650_set_auto_white_balance,
 		.get = ov9650_get_auto_white_balance
 	},
 #define AUTO_GAIN_CTRL_IDX 7
 	{
 		{
 			.id 		= V4L2_CID_AUTOGAIN,
 			.type 		= V4L2_CTRL_TYPE_BOOLEAN,
 			.name 		= "auto gain control",
 			.minimum 	= 0,
 			.maximum 	= 1,
 			.step 		= 1,
 			.default_value 	= 1
 		},
 		.set = ov9650_set_auto_gain,
 		.get = ov9650_get_auto_gain
 	}
 };

 static struct v4l2_pix_format ov9650_modes[] = {
 	{
 		176,
 		144,
 		V4L2_PIX_FMT_SBGGR8,
 		V4L2_FIELD_NONE,
 		.sizeimage =
 			176 * 144,
 		.bytesperline = 176,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 9
 	}, {
 		320,
 		240,
 		V4L2_PIX_FMT_SBGGR8,
 		V4L2_FIELD_NONE,
 		.sizeimage =
 			320 * 240,
 		.bytesperline = 320,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 8
 	}, {
 		352,
 		288,
 		V4L2_PIX_FMT_SBGGR8,
 		V4L2_FIELD_NONE,
 		.sizeimage =
 			352 * 288,
 		.bytesperline = 352,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 9
 	}, {
 		640,
 		480,
 		V4L2_PIX_FMT_SBGGR8,
 		V4L2_FIELD_NONE,
 		.sizeimage =
 			640 * 480,
 		.bytesperline = 640,
 		.colorspace = V4L2_COLORSPACE_SRGB,
 		.priv = 9
 	}
 };

 static void ov9650_dump_registers(struct sd *sd);

 int ov9650_probe(struct sd *sd)
 {
 	int err = 0;
 	u8 prod_id = 0, ver_id = 0, i;
 	s32 *sensor_settings;

 	if (force_sensor) {
 		if (force_sensor == OV9650_SENSOR) {
 			info("Forcing an %s sensor", ov9650.name);
 			goto sensor_found;
 		}
 		/* If we want to force another sensor,
 		   don't try to probe this one */
 		return -ENODEV;
 	}

 	info("Probing for an ov9650 sensor");

 	/* Run the pre-init before probing the sensor */
 	for (i = 0; i < ARRAY_SIZE(preinit_ov9650) && !err; i++) {
 		u8 data = preinit_ov9650[i][2];
 		if (preinit_ov9650[i][0] == SENSOR)
 			err = m5602_write_sensor(sd,
 				preinit_ov9650[i][1], &data, 1);
 		else
 			err = m5602_write_bridge(sd,
 				preinit_ov9650[i][1], data);
 	}

 	if (err < 0)
 		return err;

 	if (m5602_read_sensor(sd, OV9650_PID, &prod_id, 1))
 		return -ENODEV;

 	if (m5602_read_sensor(sd, OV9650_VER, &ver_id, 1))
 		return -ENODEV;

 	if ((prod_id == 0x96) && (ver_id == 0x52)) {
 		info("Detected an ov9650 sensor");
 		goto sensor_found;
 	}
 	return -ENODEV;

 sensor_found:
 	sensor_settings = kmalloc(
 		ARRAY_SIZE(ov9650_ctrls) * sizeof(s32), GFP_KERNEL);
 	if (!sensor_settings)
 		return -ENOMEM;

 	sd->gspca_dev.cam.cam_mode = ov9650_modes;
 	sd->gspca_dev.cam.nmodes = ARRAY_SIZE(ov9650_modes);
 	sd->desc->ctrls = ov9650_ctrls;
 	sd->desc->nctrls = ARRAY_SIZE(ov9650_ctrls);

 	for (i = 0; i < ARRAY_SIZE(ov9650_ctrls); i++)
 		sensor_settings[i] = ov9650_ctrls[i].qctrl.default_value;
 	sd->sensor_priv = sensor_settings;

 	if (dmi_check_system(ov9650_flip_dmi_table) && !err) {
 		info("vflip quirk active");
 		sensor_settings[VFLIP_IDX] = 1;
 	}

 	return 0;
 }

 int ov9650_init(struct sd *sd)
 {
 	int i, err = 0;
 	u8 data;
 	s32 *sensor_settings = sd->sensor_priv;

 	if (dump_sensor)
 		ov9650_dump_registers(sd);

 	for (i = 0; i < ARRAY_SIZE(init_ov9650) && !err; i++) {
 		data = init_ov9650[i][2];
 		if (init_ov9650[i][0] == SENSOR)
 			err = m5602_write_sensor(sd, init_ov9650[i][1],
 						  &data, 1);
 		else
 			err = m5602_write_bridge(sd, init_ov9650[i][1], data);
 	}

 	err = ov9650_set_exposure(&sd->gspca_dev, sensor_settings[EXPOSURE_IDX]);
 	if (err < 0)
 		return err;

 	err = ov9650_set_gain(&sd->gspca_dev, sensor_settings[GAIN_IDX]);
 	if (err < 0)
 		return err;

 	err = ov9650_set_red_balance(&sd->gspca_dev, sensor_settings[RED_BALANCE_IDX]);
 	if (err < 0)
 		return err;

 	err = ov9650_set_blue_balance(&sd->gspca_dev, sensor_settings[BLUE_BALANCE_IDX]);
 	if (err < 0)
 		return err;

 	err = ov9650_set_hflip(&sd->gspca_dev, sensor_settings[HFLIP_IDX]);
 	if (err < 0)
 		return err;

 	err = ov9650_set_vflip(&sd->gspca_dev, sensor_settings[VFLIP_IDX]);
 	if (err < 0)
 		return err;

 	err = ov9650_set_auto_white_balance(&sd->gspca_dev, sensor_settings[AUTO_WHITE_BALANCE_IDX]);
 	if (err < 0)
 		return err;

 	err = ov9650_set_auto_gain(&sd->gspca_dev, sensor_settings[AUTO_GAIN_CTRL_IDX]);
 	return err;
 }

 int ov9650_start(struct sd *sd)
 {
 	u8 data;
 	int i, err = 0;
 	struct cam *cam = &sd->gspca_dev.cam;
 	s32 *sensor_settings = sd->sensor_priv;

 	int width = cam->cam_mode[sd->gspca_dev.curr_mode].width;
 	int height = cam->cam_mode[sd->gspca_dev.curr_mode].height;
 	int ver_offs = cam->cam_mode[sd->gspca_dev.curr_mode].priv;
 	int hor_offs = OV9650_LEFT_OFFSET;

 	if (sensor_settings[VFLIP_IDX])
 		ver_offs--;

 	if (width <= 320)
 		hor_offs /= 2;

 	/* Synthesize the vsync/hsync setup */
 	for (i = 0; i < ARRAY_SIZE(res_init_ov9650) && !err; i++) {
 		if (res_init_ov9650[i][0] == BRIDGE)
 			err = m5602_write_bridge(sd, res_init_ov9650[i][1],
 				res_init_ov9650[i][2]);
 		else if (res_init_ov9650[i][0] == SENSOR) {
 			u8 data = res_init_ov9650[i][2];
 			err = m5602_write_sensor(sd,
 				res_init_ov9650[i][1], &data, 1);
 		}
 	}
 	if (err < 0)
 		return err;

 	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA,
 				 ((ver_offs >> 8) & 0xff));
 	if (err < 0)
 		return err;

 	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (ver_offs & 0xff));
 	if (err < 0)
 		return err;

 	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 0);
 	if (err < 0)
 		return err;

 	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height >> 8) & 0xff);
 	if (err < 0)
 		return err;

 	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height & 0xff));
 	if (err < 0)
 		return err;

 	for (i = 0; i < 2 && !err; i++)
 		err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 0);
 	if (err < 0)
 		return err;

 	err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA,
 				 (hor_offs >> 8) & 0xff);
 	if (err < 0)
 		return err;

 	err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, hor_offs & 0xff);
 	if (err < 0)
 		return err;

 	err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA,
 				 ((width + hor_offs) >> 8) & 0xff);
 	if (err < 0)
 		return err;

 	err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA,
 				 ((width + hor_offs) & 0xff));
 	if (err < 0)
 		return err;

 	switch (width) {
 	case 640:
 		PDEBUG(D_V4L2, "Configuring camera for VGA mode");

 		data = OV9650_VGA_SELECT | OV9650_RGB_SELECT |
 		       OV9650_RAW_RGB_SELECT;
 		err = m5602_write_sensor(sd, OV9650_COM7, &data, 1);
 		break;

 	case 352:
 		PDEBUG(D_V4L2, "Configuring camera for CIF mode");

 		data = OV9650_CIF_SELECT | OV9650_RGB_SELECT |
 				OV9650_RAW_RGB_SELECT;
 		err = m5602_write_sensor(sd, OV9650_COM7, &data, 1);
 		break;

 	case 320:
 		PDEBUG(D_V4L2, "Configuring camera for QVGA mode");

 		data = OV9650_QVGA_SELECT | OV9650_RGB_SELECT |
 				OV9650_RAW_RGB_SELECT;
 		err = m5602_write_sensor(sd, OV9650_COM7, &data, 1);
 		break;

 	case 176:
 		PDEBUG(D_V4L2, "Configuring camera for QCIF mode");

 		data = OV9650_QCIF_SELECT | OV9650_RGB_SELECT |
 			OV9650_RAW_RGB_SELECT;
 		err = m5602_write_sensor(sd, OV9650_COM7, &data, 1);
 		break;
 	}
 	return err;
 }

 int ov9650_stop(struct sd *sd)
 {
 	u8 data = OV9650_SOFT_SLEEP | OV9650_OUTPUT_DRIVE_2X;
 	return m5602_write_sensor(sd, OV9650_COM2, &data, 1);
 }

 int ov9650_power_down(struct sd *sd)
 {
 	int i, err = 0;
 	for (i = 0; i < ARRAY_SIZE(power_down_ov9650) && !err; i++) {
 		u8 data = power_down_ov9650[i][2];
 		if (power_down_ov9650[i][0] == SENSOR)
 			err = m5602_write_sensor(sd,
 					    power_down_ov9650[i][1], &data, 1);
 		else
 			err = m5602_write_bridge(sd, power_down_ov9650[i][1],
 						 data);
 	}

 	return err;
 }

 void ov9650_disconnect(struct sd *sd)
 {
 	ov9650_stop(sd);
 	ov9650_power_down(sd);

 	sd->sensor = NULL;
 	kfree(sd->sensor_priv);
 }

 int ov9650_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	*val = sensor_settings[EXPOSURE_IDX];
 	PDEBUG(D_V4L2, "Read exposure %d", *val);
 	return 0;
 }

 int ov9650_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;
 	u8 i2c_data;
 	int err;

 	PDEBUG(D_V4L2, "Set exposure to %d", val);

 	sensor_settings[EXPOSURE_IDX] = val;
 	/* The 6 MSBs */
 	i2c_data = (val >> 10) & 0x3f;
 	err = m5602_write_sensor(sd, OV9650_AECHM,
 				  &i2c_data, 1);
 	if (err < 0)
 		return err;

 	/* The 8 middle bits */
 	i2c_data = (val >> 2) & 0xff;
 	err = m5602_write_sensor(sd, OV9650_AECH,
 				  &i2c_data, 1);
 	if (err < 0)
 		return err;

 	/* The 2 LSBs */
 	i2c_data = val & 0x03;
 	err = m5602_write_sensor(sd, OV9650_COM1, &i2c_data, 1);
 	return err;
 }

 int ov9650_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	*val = sensor_settings[GAIN_IDX];
 	PDEBUG(D_V4L2, "Read gain %d", *val);
 	return 0;
 }

 int ov9650_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 i2c_data;
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	PDEBUG(D_V4L2, "Setting gain to %d", val);

 	sensor_settings[GAIN_IDX] = val;

 	/* The 2 MSB */
 	/* Read the OV9650_VREF register first to avoid
 	   corrupting the VREF high and low bits */
 	err = m5602_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
 	if (err < 0)
 		return err;

 	/* Mask away all uninteresting bits */
 	i2c_data = ((val & 0x0300) >> 2) |
 			(i2c_data & 0x3F);
 	err = m5602_write_sensor(sd, OV9650_VREF, &i2c_data, 1);
 	if (err < 0)
 		return err;

 	/* The 8 LSBs */
 	i2c_data = val & 0xff;
 	err = m5602_write_sensor(sd, OV9650_GAIN, &i2c_data, 1);
 	return err;
 }

 int ov9650_get_red_balance(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	*val = sensor_settings[RED_BALANCE_IDX];
 	PDEBUG(D_V4L2, "Read red gain %d", *val);
 	return 0;
 }

 int ov9650_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 i2c_data;
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	PDEBUG(D_V4L2, "Set red gain to %d", val);

 	sensor_settings[RED_BALANCE_IDX] = val;

 	i2c_data = val & 0xff;
 	err = m5602_write_sensor(sd, OV9650_RED, &i2c_data, 1);
 	return err;
 }

 int ov9650_get_blue_balance(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	*val = sensor_settings[BLUE_BALANCE_IDX];
 	PDEBUG(D_V4L2, "Read blue gain %d", *val);

 	return 0;
 }

 int ov9650_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 i2c_data;
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	PDEBUG(D_V4L2, "Set blue gain to %d", val);

 	sensor_settings[BLUE_BALANCE_IDX] = val;

 	i2c_data = val & 0xff;
 	err = m5602_write_sensor(sd, OV9650_BLUE, &i2c_data, 1);
 	return err;
 }

 int ov9650_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	*val = sensor_settings[HFLIP_IDX];
 	PDEBUG(D_V4L2, "Read horizontal flip %d", *val);
 	return 0;
 }

 int ov9650_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 i2c_data;
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	PDEBUG(D_V4L2, "Set horizontal flip to %d", val);

 	sensor_settings[HFLIP_IDX] = val;
 	i2c_data = ((val & 0x01) << 5) | (sensor_settings[VFLIP_IDX] << 4);
 	err = m5602_write_sensor(sd, OV9650_MVFP, &i2c_data, 1);

 	return err;
 }

 int ov9650_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	*val = sensor_settings[VFLIP_IDX];
 	PDEBUG(D_V4L2, "Read vertical flip %d", *val);

 	return 0;
 }

 int ov9650_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 i2c_data;
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	PDEBUG(D_V4L2, "Set vertical flip to %d", val);
 	sensor_settings[VFLIP_IDX] = val;

 	i2c_data = ((val & 0x01) << 4) | (sensor_settings[VFLIP_IDX] << 5);
 	err = m5602_write_sensor(sd, OV9650_MVFP, &i2c_data, 1);
 	if (err < 0)
 		return err;

 	/* When vflip is toggled we need to readjust the bridge hsync/vsync */
 	if (gspca_dev->streaming)
 		err = ov9650_start(sd);

 	return err;
 }

 int ov9650_get_brightness(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	*val = sensor_settings[GAIN_IDX];
 	PDEBUG(D_V4L2, "Read gain %d", *val);

 	return 0;
 }

 int ov9650_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 i2c_data;
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	PDEBUG(D_V4L2, "Set gain to %d", val);

 	sensor_settings[GAIN_IDX] = val;

 	/* Read the OV9650_VREF register first to avoid
 		corrupting the VREF high and low bits */
 	err = m5602_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
 	if (err < 0)
 		return err;

 	/* Mask away all uninteresting bits */
 	i2c_data = ((val & 0x0300) >> 2) | (i2c_data & 0x3F);
 	err = m5602_write_sensor(sd, OV9650_VREF, &i2c_data, 1);
 	if (err < 0)
 		return err;

 	/* The 8 LSBs */
 	i2c_data = val & 0xff;
 	err = m5602_write_sensor(sd, OV9650_GAIN, &i2c_data, 1);

 	return err;
 }

 int ov9650_get_auto_white_balance(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	*val = sensor_settings[AUTO_WHITE_BALANCE_IDX];
 	return 0;
 }

 int ov9650_set_auto_white_balance(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 i2c_data;
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	PDEBUG(D_V4L2, "Set auto white balance to %d", val);

 	sensor_settings[AUTO_WHITE_BALANCE_IDX] = val;
 	err = m5602_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
 	if (err < 0)
 		return err;

 	i2c_data = ((i2c_data & 0xfd) | ((val & 0x01) << 1));
 	err = m5602_write_sensor(sd, OV9650_COM8, &i2c_data, 1);

 	return err;
 }

 int ov9650_get_auto_gain(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	*val = sensor_settings[AUTO_GAIN_CTRL_IDX];
 	PDEBUG(D_V4L2, "Read auto gain control %d", *val);
 	return 0;
 }

 int ov9650_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 i2c_data;
 	struct sd *sd = (struct sd *) gspca_dev;
 	s32 *sensor_settings = sd->sensor_priv;

 	PDEBUG(D_V4L2, "Set auto gain control to %d", val);

 	sensor_settings[AUTO_GAIN_CTRL_IDX] = val;
 	err = m5602_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
 	if (err < 0)
 		return err;

 	i2c_data = ((i2c_data & 0xfb) | ((val & 0x01) << 2));
 	err = m5602_write_sensor(sd, OV9650_COM8, &i2c_data, 1);

 	return err;
 }

 static void ov9650_dump_registers(struct sd *sd)
 {
 	int address;
 	info("Dumping the ov9650 register state");
 	for (address = 0; address < 0xa9; address++) {
 		u8 value;
 		m5602_read_sensor(sd, address, &value, 1);
 		info("register 0x%x contains 0x%x",
 		     address, value);
 	}

 	info("ov9650 register state dump complete");

 	info("Probing for which registers that are read/write");
 	for (address = 0; address < 0xff; address++) {
 		u8 old_value, ctrl_value;
 		u8 test_value[2] = {0xff, 0xff};

 		m5602_read_sensor(sd, address, &old_value, 1);
 		m5602_write_sensor(sd, address, test_value, 1);
 		m5602_read_sensor(sd, address, &ctrl_value, 1);

 		if (ctrl_value == test_value[0])
 			info("register 0x%x is writeable", address);
 		else
 			info("register 0x%x is read only", address);

 		/* Restore original value */
 		m5602_write_sensor(sd, address, &old_value, 1);
 	}
 }
	/*
	* Driver for the ov9650 sensor
	*
	* Copyright (C) 2008 Erik Andrén
	* Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
	* Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
	*
	* Portions of code to USB interface and ALi driver software,
	* Copyright (c) 2006 Willem Duinker
	* v4l2 interface modeled after the V4L2 driver
	* for SN9C10x PC Camera Controllers
	*
	* 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, version 2.
	*
	*/

	#include "m5602_ov9650.h"

	/* Vertically and horizontally flips the image if matched, needed for machines
	where the sensor is mounted upside down */
	static
	const
	struct dmi_system_id ov9650_flip_dmi_table[] = {
	{
	.ident = "ASUS A6VC",
	.matches = {
	DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
	DMI_MATCH(DMI_PRODUCT_NAME, "A6VC")
	}
	},
	{
	.ident = "ASUS A6VM",
	.matches = {
	DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
	DMI_MATCH(DMI_PRODUCT_NAME, "A6VM")
	}
	},
	{
	.ident = "ASUS A6JC",
	.matches = {
	DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
	DMI_MATCH(DMI_PRODUCT_NAME, "A6JC")
	}
	},
	{
	.ident = "ASUS A6Ja",
	.matches = {
	DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
	DMI_MATCH(DMI_PRODUCT_NAME, "A6J")
	}
	},
	{
	.ident = "ASUS A6Kt",
	.matches = {
	DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
	DMI_MATCH(DMI_PRODUCT_NAME, "A6Kt")
	}
	},
	{
	.ident = "Alienware Aurora m9700",
	.matches = {
	DMI_MATCH(DMI_SYS_VENDOR, "alienware"),
	DMI_MATCH(DMI_PRODUCT_NAME, "Aurora m9700")
	}
	},
	{}
	};

	const static struct ctrl ov9650_ctrls[] = {
	#define EXPOSURE_IDX 0
	{
	{
	.id = V4L2_CID_EXPOSURE,
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "exposure",
	.minimum = 0x00,
	.maximum = 0x1ff,
	.step = 0x4,
	.default_value = EXPOSURE_DEFAULT,
	.flags = V4L2_CTRL_FLAG_SLIDER
	},
	.set = ov9650_set_exposure,
	.get = ov9650_get_exposure
	},
	#define GAIN_IDX 1
	{
	{
	.id = V4L2_CID_GAIN,
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "gain",
	.minimum = 0x00,
	.maximum = 0x3ff,
	.step = 0x1,
	.default_value = GAIN_DEFAULT,
	.flags = V4L2_CTRL_FLAG_SLIDER
	},
	.set = ov9650_set_gain,
	.get = ov9650_get_gain
	},
	#define RED_BALANCE_IDX 2
	{
	{
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "red balance",
	.minimum = 0x00,
	.maximum = 0xff,
	.step = 0x1,
	.default_value = RED_GAIN_DEFAULT,
	.flags = V4L2_CTRL_FLAG_SLIDER
	},
	.set = ov9650_set_red_balance,
	.get = ov9650_get_red_balance
	},
	#define BLUE_BALANCE_IDX 3
	{
	{
	.type = V4L2_CTRL_TYPE_INTEGER,
	.name = "blue balance",
	.minimum = 0x00,
	.maximum = 0xff,
	.step = 0x1,
	.default_value = BLUE_GAIN_DEFAULT,
	.flags = V4L2_CTRL_FLAG_SLIDER
	},
	.set = ov9650_set_blue_balance,
	.get = ov9650_get_blue_balance
	},
	#define HFLIP_IDX 4
	{
	{
	.id = V4L2_CID_HFLIP,
	.type = V4L2_CTRL_TYPE_BOOLEAN,
	.name = "horizontal flip",
	.minimum = 0,
	.maximum = 1,
	.step = 1,
	.default_value = 0
	},
	.set = ov9650_set_hflip,
	.get = ov9650_get_hflip
	},
	#define VFLIP_IDX 5
	{
	{
	.id = V4L2_CID_VFLIP,
	.type = V4L2_CTRL_TYPE_BOOLEAN,
	.name = "vertical flip",
	.minimum = 0,
	.maximum = 1,
	.step = 1,
	.default_value = 0
	},
	.set = ov9650_set_vflip,
	.get = ov9650_get_vflip
	},
	#define AUTO_WHITE_BALANCE_IDX 6
	{
	{
	.id = V4L2_CID_AUTO_WHITE_BALANCE,
	.type = V4L2_CTRL_TYPE_BOOLEAN,
	.name = "auto white balance",
	.minimum = 0,
	.maximum = 1,
	.step = 1,
	.default_value = 1
	},
	.set = ov9650_set_auto_white_balance,
	.get = ov9650_get_auto_white_balance
	},
	#define AUTO_GAIN_CTRL_IDX 7
	{
	{
	.id = V4L2_CID_AUTOGAIN,
	.type = V4L2_CTRL_TYPE_BOOLEAN,
	.name = "auto gain control",
	.minimum = 0,
	.maximum = 1,
	.step = 1,
	.default_value = 1
	},
	.set = ov9650_set_auto_gain,
	.get = ov9650_get_auto_gain
	}
	};

	static struct v4l2_pix_format ov9650_modes[] = {
	{
	176,
	144,
	V4L2_PIX_FMT_SBGGR8,
	V4L2_FIELD_NONE,
	.sizeimage =
	176 * 144,
	.bytesperline = 176,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 9
	}, {
	320,
	240,
	V4L2_PIX_FMT_SBGGR8,
	V4L2_FIELD_NONE,
	.sizeimage =
	320 * 240,
	.bytesperline = 320,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 8
	}, {
	352,
	288,
	V4L2_PIX_FMT_SBGGR8,
	V4L2_FIELD_NONE,
	.sizeimage =
	352 * 288,
	.bytesperline = 352,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 9
	}, {
	640,
	480,
	V4L2_PIX_FMT_SBGGR8,
	V4L2_FIELD_NONE,
	.sizeimage =
	640 * 480,
	.bytesperline = 640,
	.colorspace = V4L2_COLORSPACE_SRGB,
	.priv = 9
	}
	};

	static void ov9650_dump_registers(struct sd *sd);

	int ov9650_probe(struct sd *sd)
	{
	int err = 0;
	u8 prod_id = 0, ver_id = 0, i;
	s32 *sensor_settings;

	if (force_sensor) {
	if (force_sensor == OV9650_SENSOR) {
	info("Forcing an %s sensor", ov9650.name);
	goto sensor_found;
	}
	/* If we want to force another sensor,
	don't try to probe this one */
	return -ENODEV;
	}

	info("Probing for an ov9650 sensor");

	/* Run the pre-init before probing the sensor */
	for (i = 0; i < ARRAY_SIZE(preinit_ov9650) && !err; i++) {
	u8 data = preinit_ov9650[i][2];
	if (preinit_ov9650[i][0] == SENSOR)
	err = m5602_write_sensor(sd,
	preinit_ov9650[i][1], &data, 1);
	else
	err = m5602_write_bridge(sd,
	preinit_ov9650[i][1], data);
	}

	if (err < 0)
	return err;

	if (m5602_read_sensor(sd, OV9650_PID, &prod_id, 1))
	return -ENODEV;

	if (m5602_read_sensor(sd, OV9650_VER, &ver_id, 1))
	return -ENODEV;

	if ((prod_id == 0x96) && (ver_id == 0x52)) {
	info("Detected an ov9650 sensor");
	goto sensor_found;
	}
	return -ENODEV;

	sensor_found:
	sensor_settings = kmalloc(
	ARRAY_SIZE(ov9650_ctrls) * sizeof(s32), GFP_KERNEL);
	if (!sensor_settings)
	return -ENOMEM;

	sd->gspca_dev.cam.cam_mode = ov9650_modes;
	sd->gspca_dev.cam.nmodes = ARRAY_SIZE(ov9650_modes);
	sd->desc->ctrls = ov9650_ctrls;
	sd->desc->nctrls = ARRAY_SIZE(ov9650_ctrls);

	for (i = 0; i < ARRAY_SIZE(ov9650_ctrls); i++)
	sensor_settings[i] = ov9650_ctrls[i].qctrl.default_value;
	sd->sensor_priv = sensor_settings;

	if (dmi_check_system(ov9650_flip_dmi_table) && !err) {
	info("vflip quirk active");
	sensor_settings[VFLIP_IDX] = 1;
	}

	return 0;
	}

	int ov9650_init(struct sd *sd)
	{
	int i, err = 0;
	u8 data;
	s32 *sensor_settings = sd->sensor_priv;

	if (dump_sensor)
	ov9650_dump_registers(sd);

	for (i = 0; i < ARRAY_SIZE(init_ov9650) && !err; i++) {
	data = init_ov9650[i][2];
	if (init_ov9650[i][0] == SENSOR)
	err = m5602_write_sensor(sd, init_ov9650[i][1],
	&data, 1);
	else
	err = m5602_write_bridge(sd, init_ov9650[i][1], data);
	}

	err = ov9650_set_exposure(&sd->gspca_dev, sensor_settings[EXPOSURE_IDX]);
	if (err < 0)
	return err;

	err = ov9650_set_gain(&sd->gspca_dev, sensor_settings[GAIN_IDX]);
	if (err < 0)
	return err;

	err = ov9650_set_red_balance(&sd->gspca_dev, sensor_settings[RED_BALANCE_IDX]);
	if (err < 0)
	return err;

	err = ov9650_set_blue_balance(&sd->gspca_dev, sensor_settings[BLUE_BALANCE_IDX]);
	if (err < 0)
	return err;

	err = ov9650_set_hflip(&sd->gspca_dev, sensor_settings[HFLIP_IDX]);
	if (err < 0)
	return err;

	err = ov9650_set_vflip(&sd->gspca_dev, sensor_settings[VFLIP_IDX]);
	if (err < 0)
	return err;

	err = ov9650_set_auto_white_balance(&sd->gspca_dev, sensor_settings[AUTO_WHITE_BALANCE_IDX]);
	if (err < 0)
	return err;

	err = ov9650_set_auto_gain(&sd->gspca_dev, sensor_settings[AUTO_GAIN_CTRL_IDX]);
	return err;
	}

	int ov9650_start(struct sd *sd)
	{
	u8 data;
	int i, err = 0;
	struct cam *cam = &sd->gspca_dev.cam;
	s32 *sensor_settings = sd->sensor_priv;

	int width = cam->cam_mode[sd->gspca_dev.curr_mode].width;
	int height = cam->cam_mode[sd->gspca_dev.curr_mode].height;
	int ver_offs = cam->cam_mode[sd->gspca_dev.curr_mode].priv;
	int hor_offs = OV9650_LEFT_OFFSET;

	if (sensor_settings[VFLIP_IDX])
	ver_offs--;

	if (width <= 320)
	hor_offs /= 2;

	/* Synthesize the vsync/hsync setup */
	for (i = 0; i < ARRAY_SIZE(res_init_ov9650) && !err; i++) {
	if (res_init_ov9650[i][0] == BRIDGE)
	err = m5602_write_bridge(sd, res_init_ov9650[i][1],
	res_init_ov9650[i][2]);
	else if (res_init_ov9650[i][0] == SENSOR) {
	u8 data = res_init_ov9650[i][2];
	err = m5602_write_sensor(sd,
	res_init_ov9650[i][1], &data, 1);
	}
	}
	if (err < 0)
	return err;

	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA,
	((ver_offs >> 8) & 0xff));
	if (err < 0)
	return err;

	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (ver_offs & 0xff));
	if (err < 0)
	return err;

	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 0);
	if (err < 0)
	return err;

	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height >> 8) & 0xff);
	if (err < 0)
	return err;

	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height & 0xff));
	if (err < 0)
	return err;

	for (i = 0; i < 2 && !err; i++)
	err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 0);
	if (err < 0)
	return err;

	err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA,
	(hor_offs >> 8) & 0xff);
	if (err < 0)
	return err;

	err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, hor_offs & 0xff);
	if (err < 0)
	return err;

	err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA,
	((width + hor_offs) >> 8) & 0xff);
	if (err < 0)
	return err;

	err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA,
	((width + hor_offs) & 0xff));
	if (err < 0)
	return err;

	switch (width) {
	case 640:
	PDEBUG(D_V4L2, "Configuring camera for VGA mode");

	data = OV9650_VGA_SELECT \| OV9650_RGB_SELECT \|
	OV9650_RAW_RGB_SELECT;
	err = m5602_write_sensor(sd, OV9650_COM7, &data, 1);
	break;

	case 352:
	PDEBUG(D_V4L2, "Configuring camera for CIF mode");

	data = OV9650_CIF_SELECT \| OV9650_RGB_SELECT \|
	OV9650_RAW_RGB_SELECT;
	err = m5602_write_sensor(sd, OV9650_COM7, &data, 1);
	break;

	case 320:
	PDEBUG(D_V4L2, "Configuring camera for QVGA mode");

	data = OV9650_QVGA_SELECT \| OV9650_RGB_SELECT \|
	OV9650_RAW_RGB_SELECT;
	err = m5602_write_sensor(sd, OV9650_COM7, &data, 1);
	break;

	case 176:
	PDEBUG(D_V4L2, "Configuring camera for QCIF mode");

	data = OV9650_QCIF_SELECT \| OV9650_RGB_SELECT \|
	OV9650_RAW_RGB_SELECT;
	err = m5602_write_sensor(sd, OV9650_COM7, &data, 1);
	break;
	}
	return err;
	}

	int ov9650_stop(struct sd *sd)
	{
	u8 data = OV9650_SOFT_SLEEP \| OV9650_OUTPUT_DRIVE_2X;
	return m5602_write_sensor(sd, OV9650_COM2, &data, 1);
	}

	int ov9650_power_down(struct sd *sd)
	{
	int i, err = 0;
	for (i = 0; i < ARRAY_SIZE(power_down_ov9650) && !err; i++) {
	u8 data = power_down_ov9650[i][2];
	if (power_down_ov9650[i][0] == SENSOR)
	err = m5602_write_sensor(sd,
	power_down_ov9650[i][1], &data, 1);
	else
	err = m5602_write_bridge(sd, power_down_ov9650[i][1],
	data);
	}

	return err;
	}

	void ov9650_disconnect(struct sd *sd)
	{
	ov9650_stop(sd);
	ov9650_power_down(sd);

	sd->sensor = NULL;
	kfree(sd->sensor_priv);
	}

	int ov9650_get_exposure(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	*val = sensor_settings[EXPOSURE_IDX];
	PDEBUG(D_V4L2, "Read exposure %d", *val);
	return 0;
	}

	int ov9650_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;
	u8 i2c_data;
	int err;

	PDEBUG(D_V4L2, "Set exposure to %d", val);

	sensor_settings[EXPOSURE_IDX] = val;
	/* The 6 MSBs */
	i2c_data = (val >> 10) & 0x3f;
	err = m5602_write_sensor(sd, OV9650_AECHM,
	&i2c_data, 1);
	if (err < 0)
	return err;

	/* The 8 middle bits */
	i2c_data = (val >> 2) & 0xff;
	err = m5602_write_sensor(sd, OV9650_AECH,
	&i2c_data, 1);
	if (err < 0)
	return err;

	/* The 2 LSBs */
	i2c_data = val & 0x03;
	err = m5602_write_sensor(sd, OV9650_COM1, &i2c_data, 1);
	return err;
	}

	int ov9650_get_gain(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	*val = sensor_settings[GAIN_IDX];
	PDEBUG(D_V4L2, "Read gain %d", *val);
	return 0;
	}

	int ov9650_set_gain(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 i2c_data;
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	PDEBUG(D_V4L2, "Setting gain to %d", val);

	sensor_settings[GAIN_IDX] = val;

	/* The 2 MSB */
	/* Read the OV9650_VREF register first to avoid
	corrupting the VREF high and low bits */
	err = m5602_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
	if (err < 0)
	return err;

	/* Mask away all uninteresting bits */
	i2c_data = ((val & 0x0300) >> 2) \|
	(i2c_data & 0x3F);
	err = m5602_write_sensor(sd, OV9650_VREF, &i2c_data, 1);
	if (err < 0)
	return err;

	/* The 8 LSBs */
	i2c_data = val & 0xff;
	err = m5602_write_sensor(sd, OV9650_GAIN, &i2c_data, 1);
	return err;
	}

	int ov9650_get_red_balance(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	*val = sensor_settings[RED_BALANCE_IDX];
	PDEBUG(D_V4L2, "Read red gain %d", *val);
	return 0;
	}

	int ov9650_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 i2c_data;
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	PDEBUG(D_V4L2, "Set red gain to %d", val);

	sensor_settings[RED_BALANCE_IDX] = val;

	i2c_data = val & 0xff;
	err = m5602_write_sensor(sd, OV9650_RED, &i2c_data, 1);
	return err;
	}

	int ov9650_get_blue_balance(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	*val = sensor_settings[BLUE_BALANCE_IDX];
	PDEBUG(D_V4L2, "Read blue gain %d", *val);

	return 0;
	}

	int ov9650_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 i2c_data;
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	PDEBUG(D_V4L2, "Set blue gain to %d", val);

	sensor_settings[BLUE_BALANCE_IDX] = val;

	i2c_data = val & 0xff;
	err = m5602_write_sensor(sd, OV9650_BLUE, &i2c_data, 1);
	return err;
	}

	int ov9650_get_hflip(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	*val = sensor_settings[HFLIP_IDX];
	PDEBUG(D_V4L2, "Read horizontal flip %d", *val);
	return 0;
	}

	int ov9650_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 i2c_data;
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	PDEBUG(D_V4L2, "Set horizontal flip to %d", val);

	sensor_settings[HFLIP_IDX] = val;
	i2c_data = ((val & 0x01) << 5) \| (sensor_settings[VFLIP_IDX] << 4);
	err = m5602_write_sensor(sd, OV9650_MVFP, &i2c_data, 1);

	return err;
	}

	int ov9650_get_vflip(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	*val = sensor_settings[VFLIP_IDX];
	PDEBUG(D_V4L2, "Read vertical flip %d", *val);

	return 0;
	}

	int ov9650_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 i2c_data;
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	PDEBUG(D_V4L2, "Set vertical flip to %d", val);
	sensor_settings[VFLIP_IDX] = val;

	i2c_data = ((val & 0x01) << 4) \| (sensor_settings[VFLIP_IDX] << 5);
	err = m5602_write_sensor(sd, OV9650_MVFP, &i2c_data, 1);
	if (err < 0)
	return err;

	/* When vflip is toggled we need to readjust the bridge hsync/vsync */
	if (gspca_dev->streaming)
	err = ov9650_start(sd);

	return err;
	}

	int ov9650_get_brightness(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	*val = sensor_settings[GAIN_IDX];
	PDEBUG(D_V4L2, "Read gain %d", *val);

	return 0;
	}

	int ov9650_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 i2c_data;
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	PDEBUG(D_V4L2, "Set gain to %d", val);

	sensor_settings[GAIN_IDX] = val;

	/* Read the OV9650_VREF register first to avoid
	corrupting the VREF high and low bits */
	err = m5602_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
	if (err < 0)
	return err;

	/* Mask away all uninteresting bits */
	i2c_data = ((val & 0x0300) >> 2) \| (i2c_data & 0x3F);
	err = m5602_write_sensor(sd, OV9650_VREF, &i2c_data, 1);
	if (err < 0)
	return err;

	/* The 8 LSBs */
	i2c_data = val & 0xff;
	err = m5602_write_sensor(sd, OV9650_GAIN, &i2c_data, 1);

	return err;
	}

	int ov9650_get_auto_white_balance(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	*val = sensor_settings[AUTO_WHITE_BALANCE_IDX];
	return 0;
	}

	int ov9650_set_auto_white_balance(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 i2c_data;
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	PDEBUG(D_V4L2, "Set auto white balance to %d", val);

	sensor_settings[AUTO_WHITE_BALANCE_IDX] = val;
	err = m5602_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
	if (err < 0)
	return err;

	i2c_data = ((i2c_data & 0xfd) \| ((val & 0x01) << 1));
	err = m5602_write_sensor(sd, OV9650_COM8, &i2c_data, 1);

	return err;
	}

	int ov9650_get_auto_gain(struct gspca_dev gspca_dev, __s32 val)
	{
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	*val = sensor_settings[AUTO_GAIN_CTRL_IDX];
	PDEBUG(D_V4L2, "Read auto gain control %d", *val);
	return 0;
	}

	int ov9650_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 i2c_data;
	struct sd sd = (struct sd ) gspca_dev;
	s32 *sensor_settings = sd->sensor_priv;

	PDEBUG(D_V4L2, "Set auto gain control to %d", val);

	sensor_settings[AUTO_GAIN_CTRL_IDX] = val;
	err = m5602_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
	if (err < 0)
	return err;

	i2c_data = ((i2c_data & 0xfb) \| ((val & 0x01) << 2));
	err = m5602_write_sensor(sd, OV9650_COM8, &i2c_data, 1);

	return err;
	}

	static void ov9650_dump_registers(struct sd *sd)
	{
	int address;
	info("Dumping the ov9650 register state");
	for (address = 0; address < 0xa9; address++) {
	u8 value;
	m5602_read_sensor(sd, address, &value, 1);
	info("register 0x%x contains 0x%x",
	address, value);
	}

	info("ov9650 register state dump complete");

	info("Probing for which registers that are read/write");
	for (address = 0; address < 0xff; address++) {
	u8 old_value, ctrl_value;
	u8 test_value[2] = {0xff, 0xff};

	m5602_read_sensor(sd, address, &old_value, 1);
	m5602_write_sensor(sd, address, test_value, 1);
	m5602_read_sensor(sd, address, &ctrl_value, 1);

	if (ctrl_value == test_value[0])
	info("register 0x%x is writeable", address);
	else
	info("register 0x%x is read only", address);

	/* Restore original value */
	m5602_write_sensor(sd, address, &old_value, 1);
	}
	}