sn9c102_pas106b.c

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/***************************************************************************
 * Plug-in for PAS106B 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 <linux/delay.h>
#include "sn9c102_sensor.h"
#include "sn9c102_devtable.h"


static int pas106b_init(struct sn9c102_device* cam)
{
    int err = 0;

    err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
                       {0x00, 0x14}, {0x20, 0x17},
                       {0x20, 0x19}, {0x09, 0x18});

    err += sn9c102_i2c_write(cam, 0x02, 0x0c);
    err += sn9c102_i2c_write(cam, 0x05, 0x5a);
    err += sn9c102_i2c_write(cam, 0x06, 0x88);
    err += sn9c102_i2c_write(cam, 0x07, 0x80);
    err += sn9c102_i2c_write(cam, 0x10, 0x06);
    err += sn9c102_i2c_write(cam, 0x11, 0x06);
    err += sn9c102_i2c_write(cam, 0x12, 0x00);
    err += sn9c102_i2c_write(cam, 0x14, 0x02);
    err += sn9c102_i2c_write(cam, 0x13, 0x01);

    msleep(400);

    return err;
}


static int pas106b_get_ctrl(struct sn9c102_device* cam,
                struct v4l2_control* ctrl)
{
    switch (ctrl->id) {
    case V4L2_CID_EXPOSURE:
        {
            int r1 = sn9c102_i2c_read(cam, 0x03),
                r2 = sn9c102_i2c_read(cam, 0x04);
            if (r1 < 0 || r2 < 0)
                return -EIO;
            ctrl->value = (r1 << 4) | (r2 & 0x0f);
        }
        return 0;
    case V4L2_CID_RED_BALANCE:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
            return -EIO;
        ctrl->value &= 0x1f;
        return 0;
    case V4L2_CID_BLUE_BALANCE:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
            return -EIO;
        ctrl->value &= 0x1f;
        return 0;
    case V4L2_CID_GAIN:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x0e)) < 0)
            return -EIO;
        ctrl->value &= 0x1f;
        return 0;
    case V4L2_CID_CONTRAST:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x0f)) < 0)
            return -EIO;
        ctrl->value &= 0x07;
        return 0;
    case SN9C102_V4L2_CID_GREEN_BALANCE:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x0a)) < 0)
            return -EIO;
        ctrl->value = (ctrl->value & 0x1f) << 1;
        return 0;
    case SN9C102_V4L2_CID_DAC_MAGNITUDE:
        if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
            return -EIO;
        ctrl->value &= 0xf8;
        return 0;
    default:
        return -EINVAL;
    }
}


static int pas106b_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, 0x03, ctrl->value >> 4);
        err += sn9c102_i2c_write(cam, 0x04, ctrl->value & 0x0f);
        break;
    case V4L2_CID_RED_BALANCE:
        err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
        break;
    case V4L2_CID_BLUE_BALANCE:
        err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
        break;
    case V4L2_CID_GAIN:
        err += sn9c102_i2c_write(cam, 0x0e, ctrl->value);
        break;
    case V4L2_CID_CONTRAST:
        err += sn9c102_i2c_write(cam, 0x0f, ctrl->value);
        break;
    case SN9C102_V4L2_CID_GREEN_BALANCE:
        err += sn9c102_i2c_write(cam, 0x0a, ctrl->value >> 1);
        err += sn9c102_i2c_write(cam, 0x0b, ctrl->value >> 1);
        break;
    case SN9C102_V4L2_CID_DAC_MAGNITUDE:
        err += sn9c102_i2c_write(cam, 0x08, ctrl->value << 3);
        break;
    default:
        return -EINVAL;
    }
    err += sn9c102_i2c_write(cam, 0x13, 0x01);

    return err ? -EIO : 0;
}


static int pas106b_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) + 4,
       v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;

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

    return err;
}


static int pas106b_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, 0x2c, 0x17);
    else
        err += sn9c102_write_reg(cam, 0x20, 0x17);

    return err;
}


static const struct sn9c102_sensor pas106b = {
    .name = "PAS106B",
    .maintainer = "Luca Risolia <[email protected]>",
    .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102,
    .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
    .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
    .interface = SN9C102_I2C_2WIRES,
    .i2c_slave_id = 0x40,
    .init = &pas106b_init,
    .qctrl = {
        {
            .id = V4L2_CID_EXPOSURE,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "exposure",
            .minimum = 0x125,
            .maximum = 0xfff,
            .step = 0x001,
            .default_value = 0x140,
            .flags = 0,
        },
        {
            .id = V4L2_CID_GAIN,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "global gain",
            .minimum = 0x00,
            .maximum = 0x1f,
            .step = 0x01,
            .default_value = 0x0d,
            .flags = 0,
        },
        {
            .id = V4L2_CID_CONTRAST,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "contrast",
            .minimum = 0x00,
            .maximum = 0x07,
            .step = 0x01,
            .default_value = 0x00, /* 0x00~0x03 have same effect */
            .flags = 0,
        },
        {
            .id = V4L2_CID_RED_BALANCE,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "red balance",
            .minimum = 0x00,
            .maximum = 0x1f,
            .step = 0x01,
            .default_value = 0x04,
            .flags = 0,
        },
        {
            .id = V4L2_CID_BLUE_BALANCE,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "blue balance",
            .minimum = 0x00,
            .maximum = 0x1f,
            .step = 0x01,
            .default_value = 0x06,
            .flags = 0,
        },
        {
            .id = SN9C102_V4L2_CID_GREEN_BALANCE,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "green balance",
            .minimum = 0x00,
            .maximum = 0x3e,
            .step = 0x02,
            .default_value = 0x02,
            .flags = 0,
        },
        {
            .id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
            .type = V4L2_CTRL_TYPE_INTEGER,
            .name = "DAC magnitude",
            .minimum = 0x00,
            .maximum = 0x1f,
            .step = 0x01,
            .default_value = 0x01,
            .flags = 0,
        },
    },
    .get_ctrl = &pas106b_get_ctrl,
    .set_ctrl = &pas106b_set_ctrl,
    .cropcap = {
        .bounds = {
            .left = 0,
            .top = 0,
            .width = 352,
            .height = 288,
        },
        .defrect = {
            .left = 0,
            .top = 0,
            .width = 352,
            .height = 288,
        },
    },
    .set_crop = &pas106b_set_crop,
    .pix_format = {
        .width = 352,
        .height = 288,
        .pixelformat = V4L2_PIX_FMT_SBGGR8,
        .priv = 8, /* we use this field as 'bits per pixel' */
    },
    .set_pix_format = &pas106b_set_pix_format
};


int sn9c102_probe_pas106b(struct sn9c102_device* cam)
{
    int r0 = 0, r1 = 0;
    unsigned int pid = 0;

    /*
       Minimal initialization to enable the I2C communication
       NOTE: do NOT change the values!
    */
    if (sn9c102_write_const_regs(cam,
                     {0x01, 0x01}, /* sensor power down */
                     {0x00, 0x01}, /* sensor power on */
                    {0x28, 0x17})) /* sensor clock at 24 MHz */
        return -EIO;

    r0 = sn9c102_i2c_try_read(cam, &pas106b, 0x00);
    r1 = sn9c102_i2c_try_read(cam, &pas106b, 0x01);
    if (r0 < 0 || r1 < 0)
        return -EIO;

    pid = (r0 << 11) | ((r1 & 0xf0) >> 4);
    if (pid != 0x007)
        return -ENODEV;

    sn9c102_attach_sensor(cam, &pas106b);

    return 0;
}