sn9c102_hv7131d.c

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/***************************************************************************
 * Plug-in for HV7131D image sensor connected to the SN9C1xx PC Camera     *
 * Controllers                                                             *
 *                                                                         *
 * Copyright (C) 2004-2007 by Luca Risolia <[email protected]>  *
 *                                                                         *
 * This program is free software; you can redistribute it and/or modify    *
 * it under the terms of the GNU General Public License as published by    *
 * the Free Software Foundation; either version 2 of the License, or       *
 * (at your option) any later version.                                     *
 *                                                                         *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.               *
 ***************************************************************************/

#include "sn9c102_sensor.h"
#include "sn9c102_devtable.h"


static int hv7131d_init(struct sn9c102_device* cam)
{
    int err;

    err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
                       {0x00, 0x14}, {0x60, 0x17},
                       {0x0e, 0x18}, {0xf2, 0x19});

    err += sn9c102_i2c_write(cam, 0x01, 0x04);
    err += sn9c102_i2c_write(cam, 0x02, 0x00);
    err += sn9c102_i2c_write(cam, 0x28, 0x00);

    return err;
}


static int hv7131d_get_ctrl(struct sn9c102_device* cam,
                struct v4l2_control* ctrl)
{
    switch (ctrl->id) {
    case V4L2_CID_EXPOSURE:
        {
            int r1 = sn9c102_i2c_read(cam, 0x26),
                r2 = sn9c102_i2c_read(cam, 0x27);
            if (r1 < 0 || r2 < 0)
                return -EIO;
            ctrl->value = (r1 << 8) | (r2 & 0xff);
        }
        return 0;
    case V4L2_CID_RED_BALANCE:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x31)) < 0)
            return -EIO;
        ctrl->value = 0x3f - (ctrl->value & 0x3f);
        return 0;
    case V4L2_CID_BLUE_BALANCE:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x33)) < 0)
            return -EIO;
        ctrl->value = 0x3f - (ctrl->value & 0x3f);
        return 0;
    case SN9C102_V4L2_CID_GREEN_BALANCE:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x32)) < 0)
            return -EIO;
        ctrl->value = 0x3f - (ctrl->value & 0x3f);
        return 0;
    case SN9C102_V4L2_CID_RESET_LEVEL:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x30)) < 0)
            return -EIO;
        ctrl->value &= 0x3f;
        return 0;
    case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x34)) < 0)
            return -EIO;
        ctrl->value &= 0x07;
        return 0;
    default:
        return -EINVAL;
    }
}


static int hv7131d_set_ctrl(struct sn9c102_device* cam,
                const struct v4l2_control* ctrl)
{
    int err = 0;

    switch (ctrl->id) {
    case V4L2_CID_EXPOSURE:
        err += sn9c102_i2c_write(cam, 0x26, ctrl->value >> 8);
        err += sn9c102_i2c_write(cam, 0x27, ctrl->value & 0xff);
        break;
    case V4L2_CID_RED_BALANCE:
        err += sn9c102_i2c_write(cam, 0x31, 0x3f - ctrl->value);
        break;
    case V4L2_CID_BLUE_BALANCE:
        err += sn9c102_i2c_write(cam, 0x33, 0x3f - ctrl->value);
        break;
    case SN9C102_V4L2_CID_GREEN_BALANCE:
        err += sn9c102_i2c_write(cam, 0x32, 0x3f - ctrl->value);
        break;
    case SN9C102_V4L2_CID_RESET_LEVEL:
        err += sn9c102_i2c_write(cam, 0x30, ctrl->value);
        break;
    case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
        err += sn9c102_i2c_write(cam, 0x34, ctrl->value);
        break;
    default:
        return -EINVAL;
    }

    return err ? -EIO : 0;
}


static int hv7131d_set_crop(struct sn9c102_device* cam,
                const struct v4l2_rect* rect)
{
    struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
    int err = 0;
    u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 2,
       v_start = (u8)(rect->top - s->cropcap.bounds.top) + 2;

    err += sn9c102_write_reg(cam, h_start, 0x12);
    err += sn9c102_write_reg(cam, v_start, 0x13);

    return err;
}


static int hv7131d_set_pix_format(struct sn9c102_device* cam,
                  const struct v4l2_pix_format* pix)
{
    int err = 0;

    if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
        err += sn9c102_write_reg(cam, 0x42, 0x19);
    else
        err += sn9c102_write_reg(cam, 0xf2, 0x19);

    return err;
}


static const struct sn9c102_sensor hv7131d = {
    .name = "HV7131D",
    .maintainer = "Luca Risolia <[email protected]>",
    .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102,
    .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
    .frequency = SN9C102_I2C_100KHZ,
    .interface = SN9C102_I2C_2WIRES,
    .i2c_slave_id = 0x11,
    .init = &hv7131d_init,
    .qctrl = {
        {
            .id = V4L2_CID_EXPOSURE,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "exposure",
            .minimum = 0x0250,
            .maximum = 0xffff,
            .step = 0x0001,
            .default_value = 0x0250,
            .flags = 0,
        },
        {
            .id = V4L2_CID_RED_BALANCE,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "red balance",
            .minimum = 0x00,
            .maximum = 0x3f,
            .step = 0x01,
            .default_value = 0x00,
            .flags = 0,
        },
        {
            .id = V4L2_CID_BLUE_BALANCE,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "blue balance",
            .minimum = 0x00,
            .maximum = 0x3f,
            .step = 0x01,
            .default_value = 0x20,
            .flags = 0,
        },
        {
            .id = SN9C102_V4L2_CID_GREEN_BALANCE,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "green balance",
            .minimum = 0x00,
            .maximum = 0x3f,
            .step = 0x01,
            .default_value = 0x1e,
            .flags = 0,
        },
        {
            .id = SN9C102_V4L2_CID_RESET_LEVEL,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "reset level",
            .minimum = 0x19,
            .maximum = 0x3f,
            .step = 0x01,
            .default_value = 0x30,
            .flags = 0,
        },
        {
            .id = SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "pixel bias voltage",
            .minimum = 0x00,
            .maximum = 0x07,
            .step = 0x01,
            .default_value = 0x02,
            .flags = 0,
        },
    },
    .get_ctrl = &hv7131d_get_ctrl,
    .set_ctrl = &hv7131d_set_ctrl,
    .cropcap = {
        .bounds = {
            .left = 0,
            .top = 0,
            .width = 640,
            .height = 480,
        },
        .defrect = {
            .left = 0,
            .top = 0,
            .width = 640,
            .height = 480,
        },
    },
    .set_crop = &hv7131d_set_crop,
    .pix_format = {
        .width = 640,
        .height = 480,
        .pixelformat = V4L2_PIX_FMT_SBGGR8,
        .priv = 8,
    },
    .set_pix_format = &hv7131d_set_pix_format
};


int sn9c102_probe_hv7131d(struct sn9c102_device* cam)
{
    int r0 = 0, r1 = 0, err;

    err = sn9c102_write_const_regs(cam, {0x01, 0x01}, {0x00, 0x01},
                       {0x28, 0x17});

    r0 = sn9c102_i2c_try_read(cam, &hv7131d, 0x00);
    r1 = sn9c102_i2c_try_read(cam, &hv7131d, 0x01);
    if (err || r0 < 0 || r1 < 0)
        return -EIO;

    if ((r0 != 0x00 && r0 != 0x01) || r1 != 0x04)
        return -ENODEV;

    sn9c102_attach_sensor(cam, &hv7131d);

    return 0;
}