Upgrade 6270 support, add hvflip for MT9V112

[microdia.git] / micron.c

/**
 * @file micron.c
 * @author Comer352l
 * @date 2008-04-25
 *
 * @brief Common functions and data for Micron sensors.
 *
 * @note Copyright (C) Comer352l
 *
 * @par Licences
 *
 * 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
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/delay.h>
#include "sn9c20x.h"
#include "sn9c20x-bridge.h"
#include "micron.h"

struct sn9c20x_i2c_regs mt9v112_init[] = {
        {0x0d, 0x0021}, {0x0d, 0x0020}, {0xf0, 0x0000},
        {0x34, 0xc019}, {0x0a, 0x0011}, {0x0b, 0x000b},
        {0x20, 0x0703}, {0x35, 0x2022}, {0xf0, 0x0001},
        {0x05, 0x0000}, {0x06, 0x340c}, {0x3b, 0x042a},
        {0x3c, 0x0400}, {0xf0, 0x0002}, {0x2e, 0x0c58},
        {0x5b, 0x0001}, {0xc8, 0x9f0b}, {0xf0, 0x0001},
        {0x9b, 0x5300}, {0xf0, 0x0000}, {0x2b, 0x0020},
        {0x2c, 0x002a}, {0x2d, 0x0032}, {0x2e, 0x0020},
        {0x09, 0x01dc}, {0x01, 0x000c}, {0x02, 0x0020},
        {0x03, 0x01e0}, {0x04, 0x0280}, {0x06, 0x000c},
        {0x05, 0x0098}, {0x20, 0x0703}, {0x09, 0x01f2},
        {0x2b, 0x00a0}, {0x2c, 0x00a0}, {0x2d, 0x00a0},
        {0x2e, 0x00a0}, {0x01, 0x000c}, {0x02, 0x0020},
        {0x03, 0x01e0}, {0x04, 0x0280}, {0x06, 0x000c},
        {0x05, 0x0098}, {0x09, 0x01c1}, {0x2b, 0x00ae},
        {0x2c, 0x00ae}, {0x2d, 0x00ae}, {0x2e, 0x00ae},
        {0xff, 0xffff}
};

struct sn9c20x_i2c_regs mt9v111_init[] = {
        {0x01, 0x0004}, /* select sensor address space */
        {0x0d, 0x0001}, /* Resets chip */
        {0x0d, 0x0000},
        {0x01, 0x0001}, /* select IFP address space */
        {0x02, 0x0016}, /* ??? */
                /* 0x03: Color Correction Register 3 */
                /* 0x04: Color Correction Register 4 */
        {0x03, 0x01e1}, /* ??? */
        {0x04, 0x0281}, /* ??? */
                /* 0x05: Aperture Correction (Sharpening) */
        {0x05, 0x0004}, /* 100% sharpening,
                no automatic sharpness reduction at low light: no sharpening */
                /* 0x07: IFP Soft Reset */
                /* 0x08: Output Format Control */
        {0x07, 0x3002}, /* reset */
        {0x21, 0x0000},
        {0x25, 0x4024},
        {0x26, 0xff03},
        {0x27, 0xff10},
        {0x2b, 0x7828},
        {0x2c, 0xb43c},
        {0x2d, 0xf0a0},
        {0x2e, 0x0c64},
        {0x2f, 0x0064},
        {0x67, 0x4010},
        {0x06, 0x301c}, /* stop AWB at the current values,
                no auto exposure */
        {0x08, 0x0480}, /* bypass entire image processing,
                                raw 8+2 Bayer data output directly */
        {0x01, 0x0004}, /* select sensor address space */
        {0x02, 0x0016}, /* start with column 22 */
                /* 0x03: Window Height */
                /* 0x04: Window Width */
        {0x03, 0x01e6}, /* 486 */
        {0x04, 0x0286}, /* 646 */
                /* 0x05: Horizontal Blanking */
                /* 0x06: Vertical Blanking */
        {0x05, 0x0004}, /* 4 columns (pixel clocks) */
        {0x06, 0x0000}, /* 0 rows */
                /* 0x07: Output Control */
                /* 0x08: Row Start */
        {0x07, 0x3002}, /* normal operation + chip enable*/
        {0x08, 0x0008}, /* row 8 */
                /* 0x0c: Shutter Delay */
                /* 0x0d: Reset (Soft) */
        {0x0c, 0x0000}, /* 0 master clocks */
        {0x0d, 0x0000}, /* return to normal operation */
        {0x0e, 0x0000},
        {0x0f, 0x0000},
        {0x10, 0x0000},
        {0x11, 0x0000},
                /* 0x12: 2X Zoom Col Start
                        => 0x1e bit 0 must be set to activate zoom */
                /* 0x13: 2X Zoom Row Start
                        => 0x1e bit 0 must be set to activate zoom */
        {0x12, 0x00b0}, /* column 176 */
        {0x13, 0x007c}, /* row 124 */
        {0x14, 0x0000},
        {0x15, 0x0000},
        {0x16, 0x0000},
        {0x17, 0x0000},
        {0x18, 0x0000},
        {0x19, 0x0000},
        {0x1a, 0x0000},
        {0x1b, 0x0000},
        {0x1c, 0x0000},
        {0x1d, 0x0000},
        {0x30, 0x0000},
        {0x30, 0x0005},
        {0x31, 0x0000},
                /* 0x02: Column Start */
                /* 0x03: Window Height */
        {0x02, 0x0016}, /* coulmn 22 */
        {0x03, 0x01e1}, /* 481 */
                /* 0x04: Window Width */
                /* 0x05: Horizontal Blanking */
        {0x04, 0x0281}, /* 641 */
        {0x05, 0x0004}, /* 4 columns (pixel clocks) */
                /* 0x06: Vertical Blanking */
                /* 0x07: Output Control */
        {0x06, 0x0000}, /* 0 rows */
        {0x07, 0x3002}, /* normal operation + chip enable */
                /* 0x06: Vertical Blanking */
        {0x06, 0x002d}, /* 45 rows */
                /* 0x05: Horizontal Blanking */
        {0x05, 0x0004}, /* 4 columns (pixel clocks) */
                /* 0x09: Shutter Width */
        {0x09, 0x0064}, /* integration of 100 rows */
                /* 0x2b: Green 1 Gain */
                /* 0x2c: Blue Gain */
        {0x2b, 0x00a0}, /* 32*0.03125*2 = 2 */
        {0x2c, 0x00a0}, /* 32*0.03125*2 = 2 */
                /* 0x2d: Red Gain */
                /* 0x2e: Green 2 Gain */
        {0x2d, 0x00a0}, /* 32*0.03125*2 = 2 */
        {0x2e, 0x00a0}, /* 32*0.03125*2 = 2 */
                /* 0x02: Column Start */
                /* 0x03: Window Hight */
        {0x02, 0x0016}, /* coulmn 22 */
        {0x03, 0x01e1}, /* 481 */
                /* 0x04: Window Width */
                /* 0x05: Horizontal Blanking */
        {0x04, 0x0281}, /* 641 */
        {0x05, 0x0004}, /* 4 columns (pixel clocks) */
                /* 0x06: Vertical Blanking */
                /* 0x07: Output Control */
        {0x06, 0x002d}, /* 45 rows */
        {0x07, 0x3002}, /* RESERVED options */
                /* Writes to0x0e: UNDOCUMENTED */
        {0x0e, 0x0008},
                /* 0x06: Vertical Blanking */
        {0x06, 0x002d}, /* 45 rows */
                /* 0x05: Horizontal Blanking */
        {0x05, 0x0004}, /* 4 columns (pixel clocks) */
        {0xff, 0xffff},
};

struct sn9c20x_i2c_regs mt9v011_init[] = {
        /* 0x07: Output Control */
        {0x07, 0x0002}, /*  chip enable, normal operation */
        /* 0x0d: Soft Reset */
        {0x0d, 0x0001}, /*  reset */
        /* 0x0d: Soft Reset */
        {0x0d, 0x0000}, /*  resume operation */
        /* 0x01: Row start */
        /* 0x02: Column Start */
        {0x01, 0x0008}, /*  start with row 8 */
        {0x02, 0x0016}, /*  start with column 22 */
        /* 0x03: Window Height */
        /* 0x04: Window Width */
        {0x03, 0x01e1}, /*  481 */
        {0x04, 0x0281}, /*  641 */
        /* 0x05: Horizontal Blanking */
        /* 0x06: Vertical Blanking */
        {0x05, 0x0083}, /*  131 columns (pixel clocks) */
        {0x06, 0x0006}, /*  6 rows */
        /* 0x0d: Soft Reset */
        {0x0d, 0x0002}, /*  UNKNOWN */
        /* 0x0a: Pixel Clock Speed */
        /* 0x0b: Frame Restart */
        {0x0a, 0x0000}, /*  default */
        {0x0b, 0x0000}, /*  (has no effect/no restart) */
        /* 0x0c: Shutter Delay */
        /* 0x0d: Soft Reset */
        {0x0c, 0x0000}, /*  0 master clocks */
        {0x0d, 0x0000}, /*  resume operation */
        {0x0e, 0x0000},
        {0x0f, 0x0000},
        {0x10, 0x0000},
        {0x11, 0x0000},
        /* 0x12: 2X Zoom Column Start (from MT9V111 datasheet) */
        /* 0x13: 2X Zoom Row Start (from MT9V111 datasheet) */
        {0x12, 0x0000},
        /*  column 0 => bit0 of reg 0x1e must be set to activate zoom */
        {0x13, 0x0000},
        /*  row 0    => bit0 of reg 0x1e must be set to activate zoom */
        {0x14, 0x0000},
        {0x15, 0x0000},
        {0x16, 0x0000},
        {0x17, 0x0000},
        {0x18, 0x0000},
        {0x19, 0x0000},
        {0x1a, 0x0000},
        {0x1b, 0x0000},
        {0x1c, 0x0000},
        {0x1d, 0x0000},
        {0x32, 0x0000},
        /* 0x20: Read Mode */
        {0x20, 0x1101}, /*  output all frames (including bad frames) */
        {0x21, 0x0000},
        {0x22, 0x0000},
        {0x23, 0x0000},
        {0x24, 0x0000},
        {0x25, 0x0000},
        {0x26, 0x0000},
        {0x27, 0x0024},
        {0x2f, 0xf7b0},
        {0x30, 0x0005},
        {0x31, 0x0000},
        {0x32, 0x0000},
        {0x33, 0x0000},
        {0x34, 0x0100},
        {0x3d, 0x068f},
        {0x40, 0x01e0},
        {0x41, 0x00d1},
        {0x44, 0x0082},
        {0x5a, 0x0000},
        {0x5b, 0x0000},
        {0x5c, 0x0000},
        {0x5d, 0x0000},
        {0x5e, 0x0000},
        {0x5f, 0xa31d},
        {0x62, 0x0611},
        /* 0x0a: Pixel Clock Speed */
        {0x0a, 0x0000}, /*  default */
        /* 0x06: Vertical Blanking */
        {0x06, 0x0029}, /*  41 rows */
        /* 0x05: Horizontal Blanking */
        {0x05, 0x0009}, /*  9 columns (pixel clocks) */
        /* 0x20: Read Mode */
        {0x20, 0x1101}, /*  output all frames (including bad ones) */
        /* 0x20: Read Mode */
        {0x20, 0x1101}, /*  output all frames (including bad ones) */
        /* 0x09: Shutter Width */
        {0x09, 0x0064}, /*  integration of 100 rows */
        /* 0x07: Output Control */
        {0x07, 0x0003},
        /*  dont update changes until bit0=0, chip enable, normal operation */
        /* 0x2b: Green 1 Gain */
        /* 0x2c: Blue Gain */
        {0x2b, 0x0033}, /*  51*0.03125*1 = 1.59375 */
        {0x2c, 0x00a0}, /*  32*0.03125*2 = 2 */
        /* 0x2d: Red Gain */
        /* 0x2e: Green 2 Gain */
        {0x2d, 0x00a0}, /*  32*0.03125*2 = 2 */
        {0x2e, 0x0033}, /*  51*0.03125*1 = 1.59375 */
        /* 0x07: Output Control */
        {0x07, 0x0002}, /*  chip enable, normal operation */
        /* 0x0a: Pixel Clock Speed */
        {0x06, 0x0000}, /*  default */
        /* 0x06: Vertical Blanking */
        {0x06, 0x0029}, /*  41 rows */
        /* 0x05: Horizontal Blanking */
        {0x05, 0x0009}, /*  9 columns (pixel clocks) */
        {0xff, 0xffff},
};

struct sn9c20x_i2c_regs mt9m001_init[] = {
        {0x07, 0x0000},
        {0x07, 0x0002},
        {0x0d, 0x0001},
        {0x0d, 0x0000},
        {0x01, 0x000e},
        {0x02, 0x0014},
        {0x03, 0x03c1},
        {0x04, 0x0501},
        {0x05, 0x0083},
        {0x06, 0x0006},
        {0x0d, 0x0002},
        {0x09, 0x0000},
        {0x0a, 0x0000},
        {0x0b, 0x0000},
        {0x0c, 0x0000},
        {0x11, 0x0000},
        {0x1e, 0x8000},
        {0x20, 0x1105},
        {0x2b, 0x0008},
        {0x2c, 0x0010},
        {0x2d, 0x0014},
        {0x2e, 0x0008},
        {0x5f, 0x8904},
        {0x60, 0x0000},
        {0x61, 0x0000},
        {0x62, 0x0498},
        {0x63, 0x0000},
        {0x68, 0x0000},
        {0x20, 0x111d},
        {0x06, 0x00f2},
        {0x05, 0x0013},
        {0x20, 0x511d},
        {0x20, 0xd11d},
        {0x09, 0x03e8},
        {0x07, 0x0003},
        {0x2b, 0x0010},
        {0x2c, 0x0010},
        {0x2d, 0x0010},
        {0x2e, 0x0010},
        {0x07, 0x0002},
        {0x06, 0x00f2},
        {0x05, 0x0013},
        {0x09, 0x043c},
        {0x07, 0x0003},
        {0x2b, 0x0023},
        {0x2c, 0x003f},
        {0x2d, 0x003a},
        {0x2e, 0x0023},
        {0x07, 0x0002},
        {0x09, 0x0879},
        {0x07, 0x0003},
        {0x2b, 0x0027},
        {0x2c, 0x003f},
        {0x2d, 0x0039},
        {0x2e, 0x0027},
        {0x07, 0x0002},
        {0x09, 0x0b4c},
        {0x07, 0x0003},
        {0x2b, 0x0029},
        {0x2c, 0x003f},
        {0x2d, 0x0035},
        {0x2e, 0x0029},
        {0x07, 0x0002},
        {0x09, 0x0e1f},
        {0x07, 0x0003},
        {0x2d, 0x0030},
        {0x07, 0x0002},
        {0x09, 0x103e},
        {0x07, 0x0003},
        {0x2d, 0x002b},
        {0x07, 0x0002},
        {0x09, 0x10f2},
        {0x07, 0x0003},
        {0x2b, 0x002a},
        {0x2c, 0x003f},
        {0x2d, 0x002a},
        {0x2c, 0x002a},
        {0x07, 0x0002},
        {0x07, 0x0003},
        {0x07, 0x0002},
        {0x07, 0x0003},
        {0x07, 0x0002},
        {0x07, 0x0003},
        {0x07, 0x0002},
        {0x07, 0x0000},
};

struct sn9c20x_i2c_regs mt9m111_init[] = {
        {0xf0, 0x0000},
        /* Reset sensor */
        {0x0d, 0x0008}, {0x0d, 0x0009}, {0x0d, 0x0008},
        /* Select Page map 0x01
         * This means  all new writes now have the address prefix 0x1.
         * Example: 0x3a becomes 0x13a. */
        {0xf0, 0x0001},
        /* change pixel format of both contexts */
        {0x3a, 0x4300}, {0x9b, 0x4300},
        /* setup AE, AWB, etc */
        {0x06, 0x708e},
        /* Switch back to Page map 0x00 */
        {0xf0, 0x0000},
        {0xff, 0xffff},
};

int mt9m111_set_exposure(struct usb_sn9c20x *dev)
{
        int ret;
        __u16 exposure, page;

        exposure = dev->vsettings.exposure << 8;

        ret = 0;
        page = 0;
        ret |= sn9c20x_write_i2c_data16(dev, 1, 0xF0, &page);
        ret |= sn9c20x_write_i2c_data16(dev, 1, 0x09, &exposure);

        return ret;
}

int mt9m111_set_autoexposure(struct usb_sn9c20x *dev)
{
        int ret;
        __u16 data, page;

        ret = 0;
        page = 1;
        ret |= sn9c20x_write_i2c_data16(dev, 1, 0xF0, &page);
        ret |= sn9c20x_read_i2c_data16(dev, 1, 0x06, &data);


        if (dev->vsettings.auto_exposure == 1) {
                data |= 0x7000;
        } else if (dev->vsettings.auto_exposure == 0) {
                data &= ~0x7000;
        } else
                return -EINVAL;

        ret |= sn9c20x_write_i2c_data16(dev, 1, 0x06, &data);
        page = 0;
        ret |= sn9c20x_write_i2c_data16(dev, 1, 0xF0, &page);

        if (ret < 0) {
                UDIA_ERROR("Error: setting of auto exposure failed: "
                        "error while writing to IFP-register 0x06\n");
                return ret;
        }
        return 0;
}

int mt9m111_set_autowhitebalance(struct usb_sn9c20x *dev)
{
        int ret;
        __u16 data, page;

        ret = 0;
        page = 1;
        ret |= sn9c20x_write_i2c_data16(dev, 1, 0xF0, &page);
        ret |= sn9c20x_read_i2c_data16(dev, 1, 0x06, &data);

        if (dev->vsettings.auto_whitebalance == 1) {
                data |= 0x0002;
        } else if (dev->vsettings.auto_whitebalance == 0) {
                data &= ~0x0002;
        }

        ret |= sn9c20x_write_i2c_data16(dev, 1, 0x06, &data);
        page = 0;
        ret |= sn9c20x_write_i2c_data16(dev, 1, 0xF0, &page);

        return ret;
}

int mt9v111_select_address_space(struct usb_sn9c20x *dev, __u8 address_space)
{
        __u8 buf[2];
        int retI2C;
        int k;

        /* check if selection is valid: */
        if ((address_space != MT9V111_ADDRESSSPACE_IFP) &&
                (address_space != MT9V111_ADDRESSSPACE_SENSOR)) {
                        UDIA_WARNING("invalid register address space "
                                "selection for sensor MT9V111/MI0360SOC !\n");
                        return -1;
        }
        /* read address space slection register: */
        k = 0;
        retI2C = -1;
        while ((k < 3) && (retI2C != 0)) {
                retI2C = sn9c20x_read_i2c_data(dev, 2, 0x01, buf);
                if (retI2C != 0 && k < 2)
                        udelay(1000);
                k++;
        }
        if (retI2C != 0) {
                UDIA_ERROR("MT9V111/MI0360SOC (I2C-slave 0x5c): "
                        "read of reg0x01 (address space selection) failed !\n");
                return -1;
        }
        /* check current address space: */
        if ((buf[0] != 0x00) || (buf[1] != address_space)) {
                k = 0;
                retI2C = -1;
                while ((k < 3) && (retI2C != 0)) {
                        /* switch address space: */
                        buf[0] = 0x00; buf[1] = address_space;
                        retI2C = sn9c20x_write_i2c_data(dev, 2, 0x01, buf);
                        if (retI2C != 0 && k < 2)
                                udelay(1000);
                        k++;
                }
                if (retI2C != 0) {
                        if (address_space == MT9V111_ADDRESSSPACE_IFP)
                                UDIA_ERROR("MT9V111/MI0360SOC "
                                        "(I2C-slave 0x5c): switch to IFP "
                                        "address space failed !\n");
                        else
                                UDIA_ERROR("MT9V111/MI0360SOC "
                                        "(I2C-slave 0x5c): switch to sensor "
                                        "core address space failed !\n");
                        return -1;
                }
        }
        return 0;
}

int mt9v011_probe(struct usb_sn9c20x *dev)
{
        __u16 buf;
        int ret = -EINVAL;

        dev->camera.address = 0x5d;
        ret = sn9c20x_read_i2c_data16(dev, 1, 0xff, &buf);
        if ((ret == 0) && (buf == 0x8243))
                ret = MT9V011_SENSOR;

        return ret;
}

int mt9v111_probe(struct usb_sn9c20x *dev)
{
        __u16 buf;
        int ret = -EINVAL;

        dev->camera.address = 0x5c;
        /* Select address-space: sensor */
        buf = 0x04;
        ret = sn9c20x_write_i2c_data16(dev, 1, 0x01, &buf);
        if (ret != 0)
                return ret;

        ret = sn9c20x_read_i2c_data16(dev, 1, 0xff, &buf);
        if ((ret == 0) && (buf == 0x823a))
                ret = MT9V111_SENSOR;

        return ret;
}

int mt9v112_probe(struct usb_sn9c20x *dev)
{
        int ret;
        __u16 buf;
        dev->camera.address = 0x5d;
        /* Select address-space: sensor */
        buf = 0x00;
        ret = sn9c20x_write_i2c_data16(dev, 1, 0xf0, &buf);
        if (ret < 0) {
                dev->camera.address = 0x48;
                ret = sn9c20x_write_i2c_data16(dev, 1, 0xf0, &buf);
                if (ret < 0)
                        return ret;
        }


        ret = sn9c20x_read_i2c_data16(dev, 1, 0x00, &buf);
        if ((ret == 0) && (buf == 0x1229))
                return MT9V112_SENSOR;

        return -EINVAL;
}

int mt9v011_set_exposure(struct usb_sn9c20x *dev)
{
        int ret = 0;
        __u16 exp;

        exp = (dev->vsettings.exposure << 4);
        ret |= sn9c20x_write_i2c_data16(dev, 1, 0x09, &exp);
        /* Maybe we have to disable AE/AWB/flicker avoidence (currently not
         * used) for MT9V111 sensor, because IFP controls this register if
         * one of them is enabled. */
        return ret;
}

int mt9v111_set_exposure(struct usb_sn9c20x *dev)
{
        int ret = 0;
        __u16 exp;


        ret = mt9v111_select_address_space(dev, MT9V111_ADDRESSSPACE_SENSOR);

        if (ret < 0)
                return -11;     /* -EAGAIN */

        exp = (dev->vsettings.exposure << 4);
        ret |= sn9c20x_write_i2c_data16(dev, 1, 0x09, &exp);
        /* Maybe we have to disable AE/AWB/flicker avoidence (currently not
         * used) for MT9V111 sensor, because IFP controls this register if
         * one of them is enabled. */
        return ret;
}

int mt9v011_set_hvflip(struct usb_sn9c20x *dev)
{
        int ret = 0;
        __u8 buf[2];

        if ((dev->vsettings.hflip > 1) || (dev->vsettings.hflip < 0))
                return -EINVAL;
        if ((dev->vsettings.vflip > 1) || (dev->vsettings.vflip < 0))
                return -EINVAL;

        ret = sn9c20x_read_i2c_data(dev, 2, 0x20, buf);
        if (ret < 0)
                return ret;

        if (dev->vsettings.hflip) {
                buf[0] |= 0x80;
                /* (MSB) set bit 15: read out from
                 * bottom to top (upside down) */
                buf[1] |= 0x80;
                /* (LSB) set bit 7: readout starting 1 row later */
        } else {
                buf[0] &= 0x7f; /* (MSB) unset bit 15: normal readout */
                buf[1] &= 0x7f; /* (LSB) unset bit 7: normal readout */
        }
        if (dev->vsettings.vflip) {
                buf[0] |= 0x40;
                /* (MSB) set bit 14: read out from right to left (mirrored) */
                buf[1] |= 0x20;
                /* (LSB) set bit 5: readout starting 1 column later */
        } else {
                buf[0] &= 0xbf; /* (MSB) unset bit 14: normal readout */
                buf[1] &= 0xdf; /* (LSB) unset bit 5: normal readout */
        }

        ret = sn9c20x_write_i2c_data(dev, 2, 0x20, buf);
        return ret;
}

int mt9v111_set_hvflip(struct usb_sn9c20x *dev)
{
        int ret = 0;
        __u8 buf[2];

        if ((dev->vsettings.hflip > 1) || (dev->vsettings.hflip < 0))
                return -EINVAL;
        if ((dev->vsettings.vflip > 1) || (dev->vsettings.vflip < 0))
                return -EINVAL;


        ret = mt9v111_select_address_space(dev, MT9V111_ADDRESSSPACE_SENSOR);
        if (ret < 0)
                return -11;     /* -EAGAIN */

        ret = sn9c20x_read_i2c_data(dev, 2, 0x20, buf);
        if (ret < 0)
                return ret;

        if (dev->vsettings.hflip) {
                buf[0] |= 0x80;
                /* (MSB) set bit 15: read out from
                 * bottom to top (upside down) */
                buf[1] |= 0x80;
                /* (LSB) set bit 7: readout starting 1 row later */
        } else {
                buf[0] &= 0x7f; /* (MSB) unset bit 15: normal readout */
                buf[1] &= 0x7f; /* (LSB) unset bit 7: normal readout */
        }
        if (dev->vsettings.vflip) {
                buf[0] |= 0x40;
                /* (MSB) set bit 14: read out from right to left (mirrored) */
                buf[1] |= 0x20;
                /* (LSB) set bit 5: readout starting 1 column later */
        } else {
                buf[0] &= 0xbf; /* (MSB) unset bit 14: normal readout */
                buf[1] &= 0xdf; /* (LSB) unset bit 5: normal readout */
        }

        ret = sn9c20x_write_i2c_data(dev, 2, 0x20, buf);
        return ret;
}

int mt9v111_set_autoexposure(struct usb_sn9c20x *dev)
{
        __u16 buf[1];
        int ret = 0;

        /* Switch to IFP-register address space: */
        ret = mt9v111_select_address_space(dev, MT9V111_ADDRESSSPACE_IFP);
        if (ret < 0)
                return -11;     /* -EAGAIN */
        /* Read current value of IFP-register 0x06: */
        ret = sn9c20x_read_i2c_data16(dev, 1, MT9V111_IFPREG_OPMODECTL, buf);
        if (ret < 0) {
                UDIA_ERROR("Error: setting of auto exposure failed: "
                        "error while reading from IFP-register 0x06\n");
                return ret;
        }

        /* Set new value for register 0x06: */

        if (dev->vsettings.auto_exposure) {
                buf[0] |= MT9V111_IFP_OPMODE_AUTOEXPOSURE;
        } else {
                buf[0] &= ~MT9V111_IFP_OPMODE_AUTOEXPOSURE;
        }

        /* Write new value to IFP-register 0x06: */
        ret = sn9c20x_write_i2c_data16(dev, 1, MT9V111_IFPREG_OPMODECTL, buf);
        if (ret < 0) {
                UDIA_ERROR("Error: setting of auto exposure failed: "
                        "error while writing to IFP-register 0x06\n");
                return ret;
        }
        return 0;
}

int mt9v111_set_autowhitebalance(struct usb_sn9c20x *dev)
{
        __u16 buf[1];
        int ret = 0;

        /* Switch to IFP-register address space: */
        ret = mt9v111_select_address_space(dev, MT9V111_ADDRESSSPACE_IFP);
        if (ret < 0)
                return -11;     /* -EAGAIN */
        /* Read current value of IFP-register 0x06: */
        ret = sn9c20x_read_i2c_data16(dev, 1,
                                MT9V111_IFPREG_OPMODECTL, buf);
        if (ret < 0) {
                UDIA_ERROR("Error: setting of auto whitebalance failed: "
                        "error while reading from IFP-register 0x06\n");
                return ret;
        }
        /* Set new value for register 0x06: */
        if (dev->vsettings.auto_whitebalance == 1) {
                /* Enable automatic exposure: */
                buf[0] |= MT9V111_IFP_OPMODE_AUTOWHITEBALANCE;
        } else if (dev->vsettings.auto_whitebalance == 0) {
                /* Disable automatic exposure: */
                buf[0] &= ~MT9V111_IFP_OPMODE_AUTOWHITEBALANCE;
        } else
                return -EINVAL;
        /* Write new value to IFP-register 0x06:*/
        ret = sn9c20x_write_i2c_data16(dev, 1,
                                        MT9V111_IFPREG_OPMODECTL, buf);
        if (ret < 0) {
                UDIA_ERROR("Error: setting of auto whitebalance failed: "
                        "error while writing to IFP-register 0x06\n");
                return ret;
        }
        return 0;
}

int mt9v112_set_hvflip(struct usb_sn9c20x *dev)
{
        int ret;
        __u16 buf;

        /* Select address-space: sensor */
        buf = 0x00;
        sn9c20x_write_i2c_data16(dev, 1, 0xf0, &buf);

        ret = sn9c20x_read_i2c_data16(dev, 1, 0x20, &buf);
        if (ret < 0)
                return ret;

        if (dev->vsettings.hflip)
                buf |= 0x0002;
        else
                buf &= ~0x0002;

        if (dev->vsettings.vflip)
                buf |= 0x0001;
        else
                buf &= ~0x0001;

        ret = sn9c20x_write_i2c_data16(dev, 1, 0x20, &buf);

        return ret;
}