drivers/media/video/gspca/m5602/m5602_s5k83a.c - maze/linux - Git at Google

 /*
  * Driver for the s5k83a 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_s5k83a.h"

 int s5k83a_probe(struct sd *sd)
 {
 	u8 prod_id = 0, ver_id = 0;
 	int i, err = 0;

 	if (force_sensor) {
 		if (force_sensor == S5K83A_SENSOR) {
 			info("Forcing a %s sensor", s5k83a.name);
 			goto sensor_found;
 		}
 		/* If we want to force another sensor, don't try to probe this
 		 * one */
 		return -ENODEV;
 	}

 	info("Probing for a s5k83a sensor");

 	/* Preinit the sensor */
 	for (i = 0; i < ARRAY_SIZE(preinit_s5k83a) && !err; i++) {
 		u8 data[2] = {preinit_s5k83a[i][2], preinit_s5k83a[i][3]};
 		if (preinit_s5k83a[i][0] == SENSOR)
 			err = s5k83a_write_sensor(sd, preinit_s5k83a[i][1],
 				data, 2);
 		else
 			err = m5602_write_bridge(sd, preinit_s5k83a[i][1],
 				data[0]);
 	}

 	/* We don't know what register (if any) that contain the product id
 	 * Just pick the first addresses that seem to produce the same results
 	 * on multiple machines */
 	if (s5k83a_read_sensor(sd, 0x00, &prod_id, 1))
 		return -ENODEV;

 	if (s5k83a_read_sensor(sd, 0x01, &ver_id, 1))
 		return -ENODEV;

 	if ((prod_id == 0xff) || (ver_id == 0xff))
 		return -ENODEV;
 	else
 		info("Detected a s5k83a sensor");

 sensor_found:
 	sd->gspca_dev.cam.cam_mode = s5k83a.modes;
 	sd->gspca_dev.cam.nmodes = s5k83a.nmodes;
 	sd->desc->ctrls = s5k83a.ctrls;
 	sd->desc->nctrls = s5k83a.nctrls;
 	return 0;
 }

 int s5k83a_read_sensor(struct sd *sd, const u8 address,
 			      u8 *i2c_data, const u8 len)
 {
 	int err, i;

 	do {
 		err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
 	} while ((*i2c_data & I2C_BUSY) && !err);
 	if (err < 0)
 		goto out;

 	err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
 				 sd->sensor->i2c_slave_id);
 	if (err < 0)
 		goto out;

 	err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
 	if (err < 0)
 		goto out;

 	err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x18 + len);
 	if (err < 0)
 		goto out;

 	do {
 		err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
 	} while ((*i2c_data & I2C_BUSY) && !err);

 	if (err < 0)
 		goto out;
 	for (i = 0; i < len && !len; i++) {
 		err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));

 		PDEBUG(D_CONF, "Reading sensor register "
 				  "0x%x containing 0x%x ", address, *i2c_data);
 	}

 out:
 	return (err < 0) ? err : 0;
 }

 int s5k83a_write_sensor(struct sd *sd, const u8 address,
 			       u8 *i2c_data, const u8 len)
 {
 	int err, i;
 	u8 *p;
 	struct usb_device *udev = sd->gspca_dev.dev;
 	__u8 *buf = sd->gspca_dev.usb_buf;

 	/* No sensor with a data width larger than 16 bits has yet been seen */
 	if (len > 2 || !len)
 		return -EINVAL;

 	memcpy(buf, sensor_urb_skeleton,
 	       sizeof(sensor_urb_skeleton));

 	buf[11] = sd->sensor->i2c_slave_id;
 	buf[15] = address;

 	/* Special case larger sensor writes */
 	p = buf + 16;

 	/* Copy a four byte write sequence for each byte to be written to */
 	for (i = 0; i < len; i++) {
 		memcpy(p, sensor_urb_skeleton + 16, 4);
 		p[3] = i2c_data[i];
 		p += 4;
 		PDEBUG(D_CONF, "Writing sensor register 0x%x with 0x%x",
 		       address, i2c_data[i]);
 	}

 	/* Copy the tailer */
 	memcpy(p, sensor_urb_skeleton + 20, 4);

 	/* Set the total length */
 	p[3] = 0x10 + len;

 	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 			      0x04, 0x40, 0x19,
 			      0x0000, buf,
 			      20 + len * 4, M5602_URB_MSG_TIMEOUT);

 	return (err < 0) ? err : 0;
 }

 int s5k83a_init(struct sd *sd)
 {
 	int i, err = 0;

 	for (i = 0; i < ARRAY_SIZE(init_s5k83a) && !err; i++) {
 		u8 data[2] = {0x00, 0x00};

 		switch (init_s5k83a[i][0]) {
 		case BRIDGE:
 			err = m5602_write_bridge(sd,
 					init_s5k83a[i][1],
 					init_s5k83a[i][2]);
 			break;

 		case SENSOR:
 			data[0] = init_s5k83a[i][2];
 			err = s5k83a_write_sensor(sd,
 				init_s5k83a[i][1], data, 1);
 			break;

 		case SENSOR_LONG:
 			data[0] = init_s5k83a[i][2];
 			data[1] = init_s5k83a[i][3];
 			err = s5k83a_write_sensor(sd,
 				init_s5k83a[i][1], data, 2);
 			break;
 		default:
 			info("Invalid stream command, exiting init");
 			return -EINVAL;
 		}
 	}

 	if (dump_sensor)
 		s5k83a_dump_registers(sd);

 	return (err < 0) ? err : 0;
 }

 int s5k83a_power_down(struct sd *sd)
 {
 	return 0;
 }

 void s5k83a_dump_registers(struct sd *sd)
 {
 	int address;
 	u8 page, old_page;
 	s5k83a_read_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);

 	for (page = 0; page < 16; page++) {
 		s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
 		info("Dumping the s5k83a register state for page 0x%x", page);
 		for (address = 0; address <= 0xff; address++) {
 			u8 val = 0;
 			s5k83a_read_sensor(sd, address, &val, 1);
 			info("register 0x%x contains 0x%x",
 			     address, val);
 		}
 	}
 	info("s5k83a register state dump complete");

 	for (page = 0; page < 16; page++) {
 		s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
 		info("Probing for which registers that are read/write "
 		      "for page 0x%x", page);
 		for (address = 0; address <= 0xff; address++) {
 			u8 old_val, ctrl_val, test_val = 0xff;

 			s5k83a_read_sensor(sd, address, &old_val, 1);
 			s5k83a_write_sensor(sd, address, &test_val, 1);
 			s5k83a_read_sensor(sd, address, &ctrl_val, 1);

 			if (ctrl_val == test_val)
 				info("register 0x%x is writeable", address);
 			else
 				info("register 0x%x is read only", address);

 			/* Restore original val */
 			s5k83a_write_sensor(sd, address, &old_val, 1);
 		}
 	}
 	info("Read/write register probing complete");
 	s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);
 }

 int s5k83a_get_brightness(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	int err;
 	u8 data[2];
 	struct sd *sd = (struct sd *) gspca_dev;

 	err = s5k83a_read_sensor(sd, S5K83A_BRIGHTNESS, data, 2);
 	data[1] = data[1] << 1;
 	*val = data[1];

 	return (err < 0) ? err : 0;
 }

 int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 data[2];
 	struct sd *sd = (struct sd *) gspca_dev;

 	data[0] = 0x00;
 	data[1] = 0x20;
 	err = s5k83a_write_sensor(sd, 0x14, data, 2);
 	if (err < 0)
 		return err;

 	data[0] = 0x01;
 	data[1] = 0x00;
 	err = s5k83a_write_sensor(sd, 0x0d, data, 2);
 	if (err < 0)
 		return err;

 	/* FIXME: This is not sane, we need to figure out the composition
 		  of these registers */
 	data[0] = val >> 3; /* brightness, high 5 bits */
 	data[1] = val >> 1; /* brightness, high 7 bits */
 	err = s5k83a_write_sensor(sd, S5K83A_BRIGHTNESS, data, 2);

 	return (err < 0) ? err : 0;
 }

 int s5k83a_get_whiteness(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	int err;
 	u8 data;
 	struct sd *sd = (struct sd *) gspca_dev;

 	err = s5k83a_read_sensor(sd, S5K83A_WHITENESS, &data, 1);

 	*val = data;
 	return (err < 0) ? err : 0;
 }

 int s5k83a_set_whiteness(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 data[1];
 	struct sd *sd = (struct sd *) gspca_dev;

 	data[0] = val;
 	err = s5k83a_write_sensor(sd, S5K83A_WHITENESS, data, 1);

 	return (err < 0) ? err : 0;
 }

 int s5k83a_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	int err;
 	u8 data[2];
 	struct sd *sd = (struct sd *) gspca_dev;

 	err = s5k83a_read_sensor(sd, S5K83A_GAIN, data, 2);

 	data[1] = data[1] & 0x3f;
 	if (data[1] > S5K83A_MAXIMUM_GAIN)
 		data[1] = S5K83A_MAXIMUM_GAIN;

 	*val = data[1];

 	return (err < 0) ? err : 0;
 }

 int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 data[2];
 	struct sd *sd = (struct sd *) gspca_dev;

 	data[0] = 0;
 	data[1] = val;
 	err = s5k83a_write_sensor(sd, S5K83A_GAIN, data, 2);

 	return (err < 0) ? err : 0;
 }

 int s5k83a_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	int err;
 	u8 data[1];
 	struct sd *sd = (struct sd *) gspca_dev;

 	data[0] = 0x05;
 	err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
 	if (err < 0)
 		return err;

 	err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
 	*val = (data[0] | 0x40) ? 1 : 0;

 	return (err < 0) ? err : 0;
 }

 int s5k83a_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 data[1];
 	struct sd *sd = (struct sd *) gspca_dev;

 	data[0] = 0x05;
 	err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
 	if (err < 0)
 		return err;

 	err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
 	if (err < 0)
 		return err;

 	/* set or zero six bit, seven is hflip */
 	data[0] = (val) ? (data[0] & 0x80) | 0x40 | S5K83A_FLIP_MASK
 			: (data[0] & 0x80) | S5K83A_FLIP_MASK;
 	err = s5k83a_write_sensor(sd, S5K83A_FLIP, data, 1);
 	if (err < 0)
 		return err;

 	data[0] = (val) ? 0x0b : 0x0a;
 	err = s5k83a_write_sensor(sd, S5K83A_VFLIP_TUNE, data, 1);

 	return (err < 0) ? err : 0;
 }

 int s5k83a_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
 {
 	int err;
 	u8 data[1];
 	struct sd *sd = (struct sd *) gspca_dev;

 	data[0] = 0x05;
 	err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
 	if (err < 0)
 		return err;

 	err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
 	*val = (data[0] | 0x80) ? 1 : 0;

 	return (err < 0) ? err : 0;
 }

 int s5k83a_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
 {
 	int err;
 	u8 data[1];
 	struct sd *sd = (struct sd *) gspca_dev;

 	data[0] = 0x05;
 	err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
 	if (err < 0)
 		return err;

 	err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
 	if (err < 0)
 		return err;

 	/* set or zero seven bit, six is vflip */
 	data[0] = (val) ? (data[0] & 0x40) | 0x80 | S5K83A_FLIP_MASK
 			: (data[0] & 0x40) | S5K83A_FLIP_MASK;
 	err = s5k83a_write_sensor(sd, S5K83A_FLIP, data, 1);
 	if (err < 0)
 		return err;

 	data[0] = (val) ? 0x0a : 0x0b;
 	err = s5k83a_write_sensor(sd, S5K83A_HFLIP_TUNE, data, 1);

 	return (err < 0) ? err : 0;
 }
	/*
	* Driver for the s5k83a 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_s5k83a.h"

	int s5k83a_probe(struct sd *sd)
	{
	u8 prod_id = 0, ver_id = 0;
	int i, err = 0;

	if (force_sensor) {
	if (force_sensor == S5K83A_SENSOR) {
	info("Forcing a %s sensor", s5k83a.name);
	goto sensor_found;
	}
	/* If we want to force another sensor, don't try to probe this
	* one */
	return -ENODEV;
	}

	info("Probing for a s5k83a sensor");

	/* Preinit the sensor */
	for (i = 0; i < ARRAY_SIZE(preinit_s5k83a) && !err; i++) {
	u8 data[2] = {preinit_s5k83a[i][2], preinit_s5k83a[i][3]};
	if (preinit_s5k83a[i][0] == SENSOR)
	err = s5k83a_write_sensor(sd, preinit_s5k83a[i][1],
	data, 2);
	else
	err = m5602_write_bridge(sd, preinit_s5k83a[i][1],
	data[0]);
	}

	/* We don't know what register (if any) that contain the product id
	* Just pick the first addresses that seem to produce the same results
	* on multiple machines */
	if (s5k83a_read_sensor(sd, 0x00, &prod_id, 1))
	return -ENODEV;

	if (s5k83a_read_sensor(sd, 0x01, &ver_id, 1))
	return -ENODEV;

	if ((prod_id == 0xff) \|\| (ver_id == 0xff))
	return -ENODEV;
	else
	info("Detected a s5k83a sensor");

	sensor_found:
	sd->gspca_dev.cam.cam_mode = s5k83a.modes;
	sd->gspca_dev.cam.nmodes = s5k83a.nmodes;
	sd->desc->ctrls = s5k83a.ctrls;
	sd->desc->nctrls = s5k83a.nctrls;
	return 0;
	}

	int s5k83a_read_sensor(struct sd *sd, const u8 address,
	u8 *i2c_data, const u8 len)
	{
	int err, i;

	do {
	err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
	} while ((*i2c_data & I2C_BUSY) && !err);
	if (err < 0)
	goto out;

	err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
	sd->sensor->i2c_slave_id);
	if (err < 0)
	goto out;

	err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
	if (err < 0)
	goto out;

	err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x18 + len);
	if (err < 0)
	goto out;

	do {
	err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
	} while ((*i2c_data & I2C_BUSY) && !err);

	if (err < 0)
	goto out;
	for (i = 0; i < len && !len; i++) {
	err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));

	PDEBUG(D_CONF, "Reading sensor register "
	"0x%x containing 0x%x ", address, *i2c_data);
	}

	out:
	return (err < 0) ? err : 0;
	}

	int s5k83a_write_sensor(struct sd *sd, const u8 address,
	u8 *i2c_data, const u8 len)
	{
	int err, i;
	u8 *p;
	struct usb_device *udev = sd->gspca_dev.dev;
	__u8 *buf = sd->gspca_dev.usb_buf;

	/* No sensor with a data width larger than 16 bits has yet been seen */
	if (len > 2 \|\| !len)
	return -EINVAL;

	memcpy(buf, sensor_urb_skeleton,
	sizeof(sensor_urb_skeleton));

	buf[11] = sd->sensor->i2c_slave_id;
	buf[15] = address;

	/* Special case larger sensor writes */
	p = buf + 16;

	/* Copy a four byte write sequence for each byte to be written to */
	for (i = 0; i < len; i++) {
	memcpy(p, sensor_urb_skeleton + 16, 4);
	p[3] = i2c_data[i];
	p += 4;
	PDEBUG(D_CONF, "Writing sensor register 0x%x with 0x%x",
	address, i2c_data[i]);
	}

	/* Copy the tailer */
	memcpy(p, sensor_urb_skeleton + 20, 4);

	/* Set the total length */
	p[3] = 0x10 + len;

	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
	0x04, 0x40, 0x19,
	0x0000, buf,
	20 + len * 4, M5602_URB_MSG_TIMEOUT);

	return (err < 0) ? err : 0;
	}

	int s5k83a_init(struct sd *sd)
	{
	int i, err = 0;

	for (i = 0; i < ARRAY_SIZE(init_s5k83a) && !err; i++) {
	u8 data[2] = {0x00, 0x00};

	switch (init_s5k83a[i][0]) {
	case BRIDGE:
	err = m5602_write_bridge(sd,
	init_s5k83a[i][1],
	init_s5k83a[i][2]);
	break;

	case SENSOR:
	data[0] = init_s5k83a[i][2];
	err = s5k83a_write_sensor(sd,
	init_s5k83a[i][1], data, 1);
	break;

	case SENSOR_LONG:
	data[0] = init_s5k83a[i][2];
	data[1] = init_s5k83a[i][3];
	err = s5k83a_write_sensor(sd,
	init_s5k83a[i][1], data, 2);
	break;
	default:
	info("Invalid stream command, exiting init");
	return -EINVAL;
	}
	}

	if (dump_sensor)
	s5k83a_dump_registers(sd);

	return (err < 0) ? err : 0;
	}

	int s5k83a_power_down(struct sd *sd)
	{
	return 0;
	}

	void s5k83a_dump_registers(struct sd *sd)
	{
	int address;
	u8 page, old_page;
	s5k83a_read_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);

	for (page = 0; page < 16; page++) {
	s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
	info("Dumping the s5k83a register state for page 0x%x", page);
	for (address = 0; address <= 0xff; address++) {
	u8 val = 0;
	s5k83a_read_sensor(sd, address, &val, 1);
	info("register 0x%x contains 0x%x",
	address, val);
	}
	}
	info("s5k83a register state dump complete");

	for (page = 0; page < 16; page++) {
	s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
	info("Probing for which registers that are read/write "
	"for page 0x%x", page);
	for (address = 0; address <= 0xff; address++) {
	u8 old_val, ctrl_val, test_val = 0xff;

	s5k83a_read_sensor(sd, address, &old_val, 1);
	s5k83a_write_sensor(sd, address, &test_val, 1);
	s5k83a_read_sensor(sd, address, &ctrl_val, 1);

	if (ctrl_val == test_val)
	info("register 0x%x is writeable", address);
	else
	info("register 0x%x is read only", address);

	/* Restore original val */
	s5k83a_write_sensor(sd, address, &old_val, 1);
	}
	}
	info("Read/write register probing complete");
	s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);
	}

	int s5k83a_get_brightness(struct gspca_dev gspca_dev, __s32 val)
	{
	int err;
	u8 data[2];
	struct sd sd = (struct sd ) gspca_dev;

	err = s5k83a_read_sensor(sd, S5K83A_BRIGHTNESS, data, 2);
	data[1] = data[1] << 1;
	*val = data[1];

	return (err < 0) ? err : 0;
	}

	int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 data[2];
	struct sd sd = (struct sd ) gspca_dev;

	data[0] = 0x00;
	data[1] = 0x20;
	err = s5k83a_write_sensor(sd, 0x14, data, 2);
	if (err < 0)
	return err;

	data[0] = 0x01;
	data[1] = 0x00;
	err = s5k83a_write_sensor(sd, 0x0d, data, 2);
	if (err < 0)
	return err;

	/* FIXME: This is not sane, we need to figure out the composition
	of these registers */
	data[0] = val >> 3; /* brightness, high 5 bits */
	data[1] = val >> 1; /* brightness, high 7 bits */
	err = s5k83a_write_sensor(sd, S5K83A_BRIGHTNESS, data, 2);

	return (err < 0) ? err : 0;
	}

	int s5k83a_get_whiteness(struct gspca_dev gspca_dev, __s32 val)
	{
	int err;
	u8 data;
	struct sd sd = (struct sd ) gspca_dev;

	err = s5k83a_read_sensor(sd, S5K83A_WHITENESS, &data, 1);

	*val = data;
	return (err < 0) ? err : 0;
	}

	int s5k83a_set_whiteness(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 data[1];
	struct sd sd = (struct sd ) gspca_dev;

	data[0] = val;
	err = s5k83a_write_sensor(sd, S5K83A_WHITENESS, data, 1);

	return (err < 0) ? err : 0;
	}

	int s5k83a_get_gain(struct gspca_dev gspca_dev, __s32 val)
	{
	int err;
	u8 data[2];
	struct sd sd = (struct sd ) gspca_dev;

	err = s5k83a_read_sensor(sd, S5K83A_GAIN, data, 2);

	data[1] = data[1] & 0x3f;
	if (data[1] > S5K83A_MAXIMUM_GAIN)
	data[1] = S5K83A_MAXIMUM_GAIN;

	*val = data[1];

	return (err < 0) ? err : 0;
	}

	int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 data[2];
	struct sd sd = (struct sd ) gspca_dev;

	data[0] = 0;
	data[1] = val;
	err = s5k83a_write_sensor(sd, S5K83A_GAIN, data, 2);

	return (err < 0) ? err : 0;
	}

	int s5k83a_get_vflip(struct gspca_dev gspca_dev, __s32 val)
	{
	int err;
	u8 data[1];
	struct sd sd = (struct sd ) gspca_dev;

	data[0] = 0x05;
	err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
	if (err < 0)
	return err;

	err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
	*val = (data[0] \| 0x40) ? 1 : 0;

	return (err < 0) ? err : 0;
	}

	int s5k83a_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 data[1];
	struct sd sd = (struct sd ) gspca_dev;

	data[0] = 0x05;
	err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
	if (err < 0)
	return err;

	err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
	if (err < 0)
	return err;

	/* set or zero six bit, seven is hflip */
	data[0] = (val) ? (data[0] & 0x80) \| 0x40 \| S5K83A_FLIP_MASK
	: (data[0] & 0x80) \| S5K83A_FLIP_MASK;
	err = s5k83a_write_sensor(sd, S5K83A_FLIP, data, 1);
	if (err < 0)
	return err;

	data[0] = (val) ? 0x0b : 0x0a;
	err = s5k83a_write_sensor(sd, S5K83A_VFLIP_TUNE, data, 1);

	return (err < 0) ? err : 0;
	}

	int s5k83a_get_hflip(struct gspca_dev gspca_dev, __s32 val)
	{
	int err;
	u8 data[1];
	struct sd sd = (struct sd ) gspca_dev;

	data[0] = 0x05;
	err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
	if (err < 0)
	return err;

	err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
	*val = (data[0] \| 0x80) ? 1 : 0;

	return (err < 0) ? err : 0;
	}

	int s5k83a_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
	{
	int err;
	u8 data[1];
	struct sd sd = (struct sd ) gspca_dev;

	data[0] = 0x05;
	err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
	if (err < 0)
	return err;

	err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
	if (err < 0)
	return err;

	/* set or zero seven bit, six is vflip */
	data[0] = (val) ? (data[0] & 0x40) \| 0x80 \| S5K83A_FLIP_MASK
	: (data[0] & 0x40) \| S5K83A_FLIP_MASK;
	err = s5k83a_write_sensor(sd, S5K83A_FLIP, data, 1);
	if (err < 0)
	return err;

	data[0] = (val) ? 0x0a : 0x0b;
	err = s5k83a_write_sensor(sd, S5K83A_HFLIP_TUNE, data, 1);

	return (err < 0) ? err : 0;
	}