/***************************************************************************
 * Plug-in for PAS202BCB image sensor connected to the ZC030! Image        *
 * Processor and Control Chip                                              *
 *                                                                         *
 * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it>       *
 *                                                                         *
 * Initialization values of the ZC0301 have been taken from the SPCA5XX    *
 * driver maintained by Michel Xhaard <mxhaard@magic.fr>                   *
 *                                                                         *
 * 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 "zc0301_sensor.h"


static struct zc0301_sensor pas202bcb;


static int pas202bcb_init(struct zc0301_device* cam)
{
	int err = 0;

	err += zc0301_write_reg(cam, 0x0002, 0x00);
	err += zc0301_write_reg(cam, 0x0003, 0x02);
	err += zc0301_write_reg(cam, 0x0004, 0x80);
	err += zc0301_write_reg(cam, 0x0005, 0x01);
	err += zc0301_write_reg(cam, 0x0006, 0xE0);
	err += zc0301_write_reg(cam, 0x0098, 0x00);
	err += zc0301_write_reg(cam, 0x009A, 0x03);
	err += zc0301_write_reg(cam, 0x011A, 0x00);
	err += zc0301_write_reg(cam, 0x011C, 0x03);
	err += zc0301_write_reg(cam, 0x009B, 0x01);
	err += zc0301_write_reg(cam, 0x009C, 0xE6);
	err += zc0301_write_reg(cam, 0x009D, 0x02);
	err += zc0301_write_reg(cam, 0x009E, 0x86);

	err += zc0301_i2c_write(cam, 0x02, 0x02);
	err += zc0301_i2c_write(cam, 0x0A, 0x01);
	err += zc0301_i2c_write(cam, 0x0B, 0x01);
	err += zc0301_i2c_write(cam, 0x0D, 0x00);
	err += zc0301_i2c_write(cam, 0x12, 0x05);
	err += zc0301_i2c_write(cam, 0x13, 0x63);
	err += zc0301_i2c_write(cam, 0x15, 0x70);

	err += zc0301_write_reg(cam, 0x0101, 0xB7);
	err += zc0301_write_reg(cam, 0x0100, 0x0D);
	err += zc0301_write_reg(cam, 0x0189, 0x06);
	err += zc0301_write_reg(cam, 0x01AD, 0x00);
	err += zc0301_write_reg(cam, 0x01C5, 0x03);
	err += zc0301_write_reg(cam, 0x01CB, 0x13);
	err += zc0301_write_reg(cam, 0x0250, 0x08);
	err += zc0301_write_reg(cam, 0x0301, 0x08);
	err += zc0301_write_reg(cam, 0x018D, 0x70);
	err += zc0301_write_reg(cam, 0x0008, 0x03);
	err += zc0301_write_reg(cam, 0x01C6, 0x04);
	err += zc0301_write_reg(cam, 0x01CB, 0x07);
	err += zc0301_write_reg(cam, 0x0120, 0x11);
	err += zc0301_write_reg(cam, 0x0121, 0x37);
	err += zc0301_write_reg(cam, 0x0122, 0x58);
	err += zc0301_write_reg(cam, 0x0123, 0x79);
	err += zc0301_write_reg(cam, 0x0124, 0x91);
	err += zc0301_write_reg(cam, 0x0125, 0xA6);
	err += zc0301_write_reg(cam, 0x0126, 0xB8);
	err += zc0301_write_reg(cam, 0x0127, 0xC7);
	err += zc0301_write_reg(cam, 0x0128, 0xD3);
	err += zc0301_write_reg(cam, 0x0129, 0xDE);
	err += zc0301_write_reg(cam, 0x012A, 0xE6);
	err += zc0301_write_reg(cam, 0x012B, 0xED);
	err += zc0301_write_reg(cam, 0x012C, 0xF3);
	err += zc0301_write_reg(cam, 0x012D, 0xF8);
	err += zc0301_write_reg(cam, 0x012E, 0xFB);
	err += zc0301_write_reg(cam, 0x012F, 0xFF);
	err += zc0301_write_reg(cam, 0x0130, 0x26);
	err += zc0301_write_reg(cam, 0x0131, 0x23);
	err += zc0301_write_reg(cam, 0x0132, 0x20);
	err += zc0301_write_reg(cam, 0x0133, 0x1C);
	err += zc0301_write_reg(cam, 0x0134, 0x16);
	err += zc0301_write_reg(cam, 0x0135, 0x13);
	err += zc0301_write_reg(cam, 0x0136, 0x10);
	err += zc0301_write_reg(cam, 0x0137, 0x0D);
	err += zc0301_write_reg(cam, 0x0138, 0x0B);
	err += zc0301_write_reg(cam, 0x0139, 0x09);
	err += zc0301_write_reg(cam, 0x013A, 0x07);
	err += zc0301_write_reg(cam, 0x013B, 0x06);
	err += zc0301_write_reg(cam, 0x013C, 0x05);
	err += zc0301_write_reg(cam, 0x013D, 0x04);
	err += zc0301_write_reg(cam, 0x013E, 0x03);
	err += zc0301_write_reg(cam, 0x013F, 0x02);
	err += zc0301_write_reg(cam, 0x010A, 0x4C);
	err += zc0301_write_reg(cam, 0x010B, 0xF5);
	err += zc0301_write_reg(cam, 0x010C, 0xFF);
	err += zc0301_write_reg(cam, 0x010D, 0xF9);
	err += zc0301_write_reg(cam, 0x010E, 0x51);
	err += zc0301_write_reg(cam, 0x010F, 0xF5);
	err += zc0301_write_reg(cam, 0x0110, 0xFB);
	err += zc0301_write_reg(cam, 0x0111, 0xED);
	err += zc0301_write_reg(cam, 0x0112, 0x5F);
	err += zc0301_write_reg(cam, 0x0180, 0x00);
	err += zc0301_write_reg(cam, 0x0019, 0x00);
	err += zc0301_write_reg(cam, 0x0087, 0x20);
	err += zc0301_write_reg(cam, 0x0088, 0x21);

	err += zc0301_i2c_write(cam, 0x20, 0x02);
	err += zc0301_i2c_write(cam, 0x21, 0x1B);
	err += zc0301_i2c_write(cam, 0x03, 0x44);
	err += zc0301_i2c_write(cam, 0x0E, 0x01);
	err += zc0301_i2c_write(cam, 0x0F, 0x00);

	err += zc0301_write_reg(cam, 0x01A9, 0x14);
	err += zc0301_write_reg(cam, 0x01AA, 0x24);
	err += zc0301_write_reg(cam, 0x0190, 0x00);
	err += zc0301_write_reg(cam, 0x0191, 0x02);
	err += zc0301_write_reg(cam, 0x0192, 0x1B);
	err += zc0301_write_reg(cam, 0x0195, 0x00);
	err += zc0301_write_reg(cam, 0x0196, 0x00);
	err += zc0301_write_reg(cam, 0x0197, 0x4D);
	err += zc0301_write_reg(cam, 0x018C, 0x10);
	err += zc0301_write_reg(cam, 0x018F, 0x20);
	err += zc0301_write_reg(cam, 0x001D, 0x44);
	err += zc0301_write_reg(cam, 0x001E, 0x6F);
	err += zc0301_write_reg(cam, 0x001F, 0xAD);
	err += zc0301_write_reg(cam, 0x0020, 0xEB);
	err += zc0301_write_reg(cam, 0x0087, 0x0F);
	err += zc0301_write_reg(cam, 0x0088, 0x0E);
	err += zc0301_write_reg(cam, 0x0180, 0x40);
	err += zc0301_write_reg(cam, 0x0192, 0x1B);
	err += zc0301_write_reg(cam, 0x0191, 0x02);
	err += zc0301_write_reg(cam, 0x0190, 0x00);
	err += zc0301_write_reg(cam, 0x0116, 0x1D);
	err += zc0301_write_reg(cam, 0x0117, 0x40);
	err += zc0301_write_reg(cam, 0x0118, 0x99);
	err += zc0301_write_reg(cam, 0x0180, 0x42);
	err += zc0301_write_reg(cam, 0x0116, 0x1D);
	err += zc0301_write_reg(cam, 0x0117, 0x40);
	err += zc0301_write_reg(cam, 0x0118, 0x99);
	err += zc0301_write_reg(cam, 0x0007, 0x00);

	err += zc0301_i2c_write(cam, 0x11, 0x01);

	msleep(100);

	return err;
}


static int pas202bcb_get_ctrl(struct zc0301_device* cam,
                              struct v4l2_control* ctrl)
{
	switch (ctrl->id) {
	case V4L2_CID_EXPOSURE:
		{
			int r1 = zc0301_i2c_read(cam, 0x04, 1),
			    r2 = zc0301_i2c_read(cam, 0x05, 1);
			if (r1 < 0 || r2 < 0)
				return -EIO;
			ctrl->value = (r1 << 6) | (r2 & 0x3f);
		}
		return 0;
	case V4L2_CID_RED_BALANCE:
		if ((ctrl->value = zc0301_i2c_read(cam, 0x09, 1)) < 0)
			return -EIO;
		ctrl->value &= 0x0f;
		return 0;
	case V4L2_CID_BLUE_BALANCE:
		if ((ctrl->value = zc0301_i2c_read(cam, 0x07, 1)) < 0)
			return -EIO;
		ctrl->value &= 0x0f;
		return 0;
	case V4L2_CID_GAIN:
		if ((ctrl->value = zc0301_i2c_read(cam, 0x10, 1)) < 0)
			return -EIO;
		ctrl->value &= 0x1f;
		return 0;
	case ZC0301_V4L2_CID_GREEN_BALANCE:
		if ((ctrl->value = zc0301_i2c_read(cam, 0x08, 1)) < 0)
			return -EIO;
		ctrl->value &= 0x0f;
		return 0;
	case ZC0301_V4L2_CID_DAC_MAGNITUDE:
		if ((ctrl->value = zc0301_i2c_read(cam, 0x0c, 1)) < 0)
			return -EIO;
		return 0;
	default:
		return -EINVAL;
	}
}


static int pas202bcb_set_ctrl(struct zc0301_device* cam,
                              const struct v4l2_control* ctrl)
{
	int err = 0;

	switch (ctrl->id) {
	case V4L2_CID_EXPOSURE:
		err += zc0301_i2c_write(cam, 0x04, ctrl->value >> 6);
		err += zc0301_i2c_write(cam, 0x05, ctrl->value & 0x3f);
		break;
	case V4L2_CID_RED_BALANCE:
		err += zc0301_i2c_write(cam, 0x09, ctrl->value);
		break;
	case V4L2_CID_BLUE_BALANCE:
		err += zc0301_i2c_write(cam, 0x07, ctrl->value);
		break;
	case V4L2_CID_GAIN:
		err += zc0301_i2c_write(cam, 0x10, ctrl->value);
		break;
	case ZC0301_V4L2_CID_GREEN_BALANCE:
		err += zc0301_i2c_write(cam, 0x08, ctrl->value);
		break;
	case ZC0301_V4L2_CID_DAC_MAGNITUDE:
		err += zc0301_i2c_write(cam, 0x0c, ctrl->value);
		break;
	default:
		return -EINVAL;
	}
	err += zc0301_i2c_write(cam, 0x11, 0x01);

	return err ? -EIO : 0;
}


static struct zc0301_sensor pas202bcb = {
	.name = "PAS202BCB",
	.init = &pas202bcb_init,
	.qctrl = {
		{
			.id = V4L2_CID_EXPOSURE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "exposure",
			.minimum = 0x01e5,
			.maximum = 0x3fff,
			.step = 0x0001,
			.default_value = 0x01e5,
			.flags = 0,
		},
		{
			.id = V4L2_CID_GAIN,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "global gain",
			.minimum = 0x00,
			.maximum = 0x1f,
			.step = 0x01,
			.default_value = 0x0c,
			.flags = 0,
		},
		{
			.id = V4L2_CID_RED_BALANCE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "red balance",
			.minimum = 0x00,
			.maximum = 0x0f,
			.step = 0x01,
			.default_value = 0x01,
			.flags = 0,
		},
		{
			.id = V4L2_CID_BLUE_BALANCE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "blue balance",
			.minimum = 0x00,
			.maximum = 0x0f,
			.step = 0x01,
			.default_value = 0x05,
			.flags = 0,
		},
		{
			.id = ZC0301_V4L2_CID_GREEN_BALANCE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "green balance",
			.minimum = 0x00,
			.maximum = 0x0f,
			.step = 0x01,
			.default_value = 0x00,
			.flags = 0,
		},
		{
			.id = ZC0301_V4L2_CID_DAC_MAGNITUDE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "DAC magnitude",
			.minimum = 0x00,
			.maximum = 0xff,
			.step = 0x01,
			.default_value = 0x04,
			.flags = 0,
		},
	},
	.get_ctrl = &pas202bcb_get_ctrl,
	.set_ctrl = &pas202bcb_set_ctrl,
	.cropcap = {
		.bounds = {
			.left = 0,
			.top = 0,
			.width = 640,
			.height = 480,
		},
		.defrect = {
			.left = 0,
			.top = 0,
			.width = 640,
			.height = 480,
		},
	},
	.pix_format = {
		.width = 640,
		.height = 480,
		.pixelformat = V4L2_PIX_FMT_JPEG,
		.priv = 16,
	},
};


int zc0301_probe_pas202bcb(struct zc0301_device* cam)
{
	int r0 = 0, r1 = 0, err = 0;
	unsigned int pid = 0;

	err += zc0301_write_reg(cam, 0x0000, 0x01);
	err += zc0301_write_reg(cam, 0x0010, 0x0e);
	err += zc0301_write_reg(cam, 0x0001, 0x01);
	err += zc0301_write_reg(cam, 0x0012, 0x03);
	err += zc0301_write_reg(cam, 0x0012, 0x01);
	err += zc0301_write_reg(cam, 0x008d, 0x08);

	msleep(10);

	r0 = zc0301_i2c_read(cam, 0x00, 1);
	r1 = zc0301_i2c_read(cam, 0x01, 1);

	if (r0 < 0 || r1 < 0 || err)
		return -EIO;

	pid = (r0 << 4) | ((r1 & 0xf0) >> 4);
	if (pid != 0x017)
		return -ENODEV;

	zc0301_attach_sensor(cam, &pas202bcb);

	return 0;
}