294 lines
8.0 KiB
C
294 lines
8.0 KiB
C
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/***************************************************************************
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* Plug-in for PAS202BCB image sensor connected to the SN9C10x PC Camera *
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* Controllers *
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* *
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* Copyright (C) 2004 by Carlos Eduardo Medaglia Dyonisio *
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* <medaglia@undl.org.br> *
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* http://cadu.homelinux.com:8080/ *
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* *
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* DAC Magnitude, exposure and green gain controls added by *
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* Luca Risolia <luca.risolia@studio.unibo.it> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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***************************************************************************/
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#include <linux/delay.h>
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#include "sn9c102_sensor.h"
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static struct sn9c102_sensor pas202bcb;
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static int pas202bcb_init(struct sn9c102_device* cam)
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{
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int err = 0;
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err += sn9c102_write_reg(cam, 0x00, 0x10);
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err += sn9c102_write_reg(cam, 0x00, 0x11);
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err += sn9c102_write_reg(cam, 0x00, 0x14);
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err += sn9c102_write_reg(cam, 0x20, 0x17);
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err += sn9c102_write_reg(cam, 0x30, 0x19);
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err += sn9c102_write_reg(cam, 0x09, 0x18);
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err += sn9c102_i2c_write(cam, 0x02, 0x14);
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err += sn9c102_i2c_write(cam, 0x03, 0x40);
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err += sn9c102_i2c_write(cam, 0x0d, 0x2c);
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err += sn9c102_i2c_write(cam, 0x0e, 0x01);
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err += sn9c102_i2c_write(cam, 0x0f, 0xa9);
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err += sn9c102_i2c_write(cam, 0x10, 0x08);
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err += sn9c102_i2c_write(cam, 0x13, 0x63);
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err += sn9c102_i2c_write(cam, 0x15, 0x70);
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err += sn9c102_i2c_write(cam, 0x11, 0x01);
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msleep(400);
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return err;
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}
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static int pas202bcb_get_ctrl(struct sn9c102_device* cam,
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struct v4l2_control* ctrl)
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{
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switch (ctrl->id) {
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case V4L2_CID_EXPOSURE:
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{
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int r1 = sn9c102_i2c_read(cam, 0x04),
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r2 = sn9c102_i2c_read(cam, 0x05);
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if (r1 < 0 || r2 < 0)
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return -EIO;
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ctrl->value = (r1 << 6) | (r2 & 0x3f);
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}
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return 0;
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case V4L2_CID_RED_BALANCE:
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if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
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return -EIO;
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ctrl->value &= 0x0f;
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return 0;
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case V4L2_CID_BLUE_BALANCE:
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if ((ctrl->value = sn9c102_i2c_read(cam, 0x07)) < 0)
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return -EIO;
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ctrl->value &= 0x0f;
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return 0;
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case V4L2_CID_GAIN:
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if ((ctrl->value = sn9c102_i2c_read(cam, 0x10)) < 0)
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return -EIO;
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ctrl->value &= 0x1f;
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return 0;
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case SN9C102_V4L2_CID_GREEN_BALANCE:
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if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
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return -EIO;
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ctrl->value &= 0x0f;
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return 0;
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case SN9C102_V4L2_CID_DAC_MAGNITUDE:
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if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
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return -EIO;
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return 0;
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default:
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return -EINVAL;
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}
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}
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static int pas202bcb_set_pix_format(struct sn9c102_device* cam,
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const struct v4l2_pix_format* pix)
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{
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int err = 0;
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if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
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err += sn9c102_write_reg(cam, 0x24, 0x17);
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else
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err += sn9c102_write_reg(cam, 0x20, 0x17);
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return err;
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}
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static int pas202bcb_set_ctrl(struct sn9c102_device* cam,
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const struct v4l2_control* ctrl)
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{
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int err = 0;
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switch (ctrl->id) {
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case V4L2_CID_EXPOSURE:
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err += sn9c102_i2c_write(cam, 0x04, ctrl->value >> 6);
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err += sn9c102_i2c_write(cam, 0x05, ctrl->value & 0x3f);
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break;
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case V4L2_CID_RED_BALANCE:
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err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
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break;
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case V4L2_CID_BLUE_BALANCE:
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err += sn9c102_i2c_write(cam, 0x07, ctrl->value);
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break;
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case V4L2_CID_GAIN:
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err += sn9c102_i2c_write(cam, 0x10, ctrl->value);
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break;
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case SN9C102_V4L2_CID_GREEN_BALANCE:
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err += sn9c102_i2c_write(cam, 0x08, ctrl->value);
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break;
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case SN9C102_V4L2_CID_DAC_MAGNITUDE:
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err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
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break;
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default:
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return -EINVAL;
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}
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err += sn9c102_i2c_write(cam, 0x11, 0x01);
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return err ? -EIO : 0;
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}
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static int pas202bcb_set_crop(struct sn9c102_device* cam,
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const struct v4l2_rect* rect)
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{
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struct sn9c102_sensor* s = &pas202bcb;
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int err = 0;
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u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
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v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
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err += sn9c102_write_reg(cam, h_start, 0x12);
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err += sn9c102_write_reg(cam, v_start, 0x13);
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return err;
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}
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static struct sn9c102_sensor pas202bcb = {
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.name = "PAS202BCB",
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.maintainer = "Carlos Eduardo Medaglia Dyonisio "
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"<medaglia@undl.org.br>",
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.sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
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.frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
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.interface = SN9C102_I2C_2WIRES,
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.i2c_slave_id = 0x40,
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.init = &pas202bcb_init,
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.qctrl = {
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{
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.id = V4L2_CID_EXPOSURE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "exposure",
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.minimum = 0x01e5,
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.maximum = 0x3fff,
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.step = 0x0001,
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.default_value = 0x01e5,
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.flags = 0,
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},
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{
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.id = V4L2_CID_GAIN,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "global gain",
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.minimum = 0x00,
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.maximum = 0x1f,
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.step = 0x01,
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.default_value = 0x0c,
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.flags = 0,
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},
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{
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.id = V4L2_CID_RED_BALANCE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "red balance",
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.minimum = 0x00,
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.maximum = 0x0f,
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.step = 0x01,
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.default_value = 0x01,
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.flags = 0,
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},
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{
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.id = V4L2_CID_BLUE_BALANCE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "blue balance",
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.minimum = 0x00,
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.maximum = 0x0f,
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.step = 0x01,
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.default_value = 0x05,
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.flags = 0,
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},
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{
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.id = SN9C102_V4L2_CID_GREEN_BALANCE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "green balance",
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.minimum = 0x00,
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.maximum = 0x0f,
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.step = 0x01,
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.default_value = 0x00,
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.flags = 0,
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},
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{
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.id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "DAC magnitude",
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.minimum = 0x00,
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.maximum = 0xff,
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.step = 0x01,
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.default_value = 0x04,
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.flags = 0,
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},
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},
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.get_ctrl = &pas202bcb_get_ctrl,
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.set_ctrl = &pas202bcb_set_ctrl,
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.cropcap = {
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.bounds = {
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.left = 0,
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.top = 0,
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.width = 640,
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.height = 480,
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},
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.defrect = {
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.left = 0,
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.top = 0,
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.width = 640,
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.height = 480,
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},
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},
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.set_crop = &pas202bcb_set_crop,
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.pix_format = {
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.width = 640,
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.height = 480,
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.pixelformat = V4L2_PIX_FMT_SBGGR8,
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.priv = 8,
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},
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.set_pix_format = &pas202bcb_set_pix_format
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};
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int sn9c102_probe_pas202bcb(struct sn9c102_device* cam)
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{
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int r0 = 0, r1 = 0, err = 0;
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unsigned int pid = 0;
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/*
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* Minimal initialization to enable the I2C communication
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* NOTE: do NOT change the values!
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*/
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err += sn9c102_write_reg(cam, 0x01, 0x01); /* sensor power down */
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err += sn9c102_write_reg(cam, 0x40, 0x01); /* sensor power on */
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err += sn9c102_write_reg(cam, 0x28, 0x17); /* sensor clock at 24 MHz */
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if (err)
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return -EIO;
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r0 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x00);
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r1 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x01);
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if (r0 < 0 || r1 < 0)
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return -EIO;
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pid = (r0 << 4) | ((r1 & 0xf0) >> 4);
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if (pid != 0x017)
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return -ENODEV;
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sn9c102_attach_sensor(cam, &pas202bcb);
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return 0;
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}
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