/***************************************************************************
 * Plug-in for OV7630 image sensor connected to the SN9C1xx PC Camera      *
 * Controllers                                                             *
 *                                                                         *
 * Copyright (C) 2006-2007 by Luca Risolia <luca.risolia@studio.unibo.it>  *
 *                                                                         *
 * 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"


static int ov7630_init(struct sn9c102_device* cam)
{
	int err = 0;

	switch (sn9c102_get_bridge(cam)) {
	case BRIDGE_SN9C101:
	case BRIDGE_SN9C102:
		err = sn9c102_write_const_regs(cam, {0x00, 0x14}, {0x60, 0x17},
					       {0x0f, 0x18}, {0x50, 0x19});

		err += sn9c102_i2c_write(cam, 0x12, 0x8d);
		err += sn9c102_i2c_write(cam, 0x12, 0x0d);
		err += sn9c102_i2c_write(cam, 0x11, 0x00);
		err += sn9c102_i2c_write(cam, 0x15, 0x35);
		err += sn9c102_i2c_write(cam, 0x16, 0x03);
		err += sn9c102_i2c_write(cam, 0x17, 0x1c);
		err += sn9c102_i2c_write(cam, 0x18, 0xbd);
		err += sn9c102_i2c_write(cam, 0x19, 0x06);
		err += sn9c102_i2c_write(cam, 0x1a, 0xf6);
		err += sn9c102_i2c_write(cam, 0x1b, 0x04);
		err += sn9c102_i2c_write(cam, 0x20, 0x44);
		err += sn9c102_i2c_write(cam, 0x23, 0xee);
		err += sn9c102_i2c_write(cam, 0x26, 0xa0);
		err += sn9c102_i2c_write(cam, 0x27, 0x9a);
		err += sn9c102_i2c_write(cam, 0x28, 0x20);
		err += sn9c102_i2c_write(cam, 0x29, 0x30);
		err += sn9c102_i2c_write(cam, 0x2f, 0x3d);
		err += sn9c102_i2c_write(cam, 0x30, 0x24);
		err += sn9c102_i2c_write(cam, 0x32, 0x86);
		err += sn9c102_i2c_write(cam, 0x60, 0xa9);
		err += sn9c102_i2c_write(cam, 0x61, 0x42);
		err += sn9c102_i2c_write(cam, 0x65, 0x00);
		err += sn9c102_i2c_write(cam, 0x69, 0x38);
		err += sn9c102_i2c_write(cam, 0x6f, 0x88);
		err += sn9c102_i2c_write(cam, 0x70, 0x0b);
		err += sn9c102_i2c_write(cam, 0x71, 0x00);
		err += sn9c102_i2c_write(cam, 0x74, 0x21);
		err += sn9c102_i2c_write(cam, 0x7d, 0xf7);
		break;
	case BRIDGE_SN9C103:
		err = sn9c102_write_const_regs(cam, {0x00, 0x02}, {0x00, 0x03},
					       {0x1a, 0x04}, {0x20, 0x05},
					       {0x20, 0x06}, {0x20, 0x07},
					       {0x03, 0x10}, {0x0a, 0x14},
					       {0x60, 0x17}, {0x0f, 0x18},
					       {0x50, 0x19}, {0x1d, 0x1a},
					       {0x10, 0x1b}, {0x02, 0x1c},
					       {0x03, 0x1d}, {0x0f, 0x1e},
					       {0x0c, 0x1f}, {0x00, 0x20},
					       {0x10, 0x21}, {0x20, 0x22},
					       {0x30, 0x23}, {0x40, 0x24},
					       {0x50, 0x25}, {0x60, 0x26},
					       {0x70, 0x27}, {0x80, 0x28},
					       {0x90, 0x29}, {0xa0, 0x2a},
					       {0xb0, 0x2b}, {0xc0, 0x2c},
					       {0xd0, 0x2d}, {0xe0, 0x2e},
					       {0xf0, 0x2f}, {0xff, 0x30});

		err += sn9c102_i2c_write(cam, 0x12, 0x8d);
		err += sn9c102_i2c_write(cam, 0x12, 0x0d);
		err += sn9c102_i2c_write(cam, 0x15, 0x34);
		err += sn9c102_i2c_write(cam, 0x11, 0x01);
		err += sn9c102_i2c_write(cam, 0x1b, 0x04);
		err += sn9c102_i2c_write(cam, 0x20, 0x44);
		err += sn9c102_i2c_write(cam, 0x23, 0xee);
		err += sn9c102_i2c_write(cam, 0x26, 0xa0);
		err += sn9c102_i2c_write(cam, 0x27, 0x9a);
		err += sn9c102_i2c_write(cam, 0x28, 0x20);
		err += sn9c102_i2c_write(cam, 0x29, 0x30);
		err += sn9c102_i2c_write(cam, 0x2f, 0x3d);
		err += sn9c102_i2c_write(cam, 0x30, 0x24);
		err += sn9c102_i2c_write(cam, 0x32, 0x86);
		err += sn9c102_i2c_write(cam, 0x60, 0xa9);
		err += sn9c102_i2c_write(cam, 0x61, 0x42);
		err += sn9c102_i2c_write(cam, 0x65, 0x00);
		err += sn9c102_i2c_write(cam, 0x69, 0x38);
		err += sn9c102_i2c_write(cam, 0x6f, 0x88);
		err += sn9c102_i2c_write(cam, 0x70, 0x0b);
		err += sn9c102_i2c_write(cam, 0x71, 0x00);
		err += sn9c102_i2c_write(cam, 0x74, 0x21);
		err += sn9c102_i2c_write(cam, 0x7d, 0xf7);
		break;
	default:
		break;
	}

	return err;
}


static int ov7630_get_ctrl(struct sn9c102_device* cam,
			   struct v4l2_control* ctrl)
{
	int err = 0;

	switch (ctrl->id) {
	case V4L2_CID_EXPOSURE:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x10)) < 0)
			return -EIO;
		break;
	case V4L2_CID_RED_BALANCE:
		ctrl->value = sn9c102_pread_reg(cam, 0x07);
		break;
	case V4L2_CID_BLUE_BALANCE:
		ctrl->value = sn9c102_pread_reg(cam, 0x06);
		break;
	case SN9C102_V4L2_CID_GREEN_BALANCE:
		ctrl->value = sn9c102_pread_reg(cam, 0x05);
		break;
	case V4L2_CID_GAIN:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x00)) < 0)
			return -EIO;
		ctrl->value &= 0x3f;
		break;
	case V4L2_CID_DO_WHITE_BALANCE:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
			return -EIO;
		ctrl->value &= 0x3f;
		break;
	case V4L2_CID_WHITENESS:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x0d)) < 0)
			return -EIO;
		ctrl->value &= 0x3f;
		break;
	case V4L2_CID_AUTOGAIN:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x13)) < 0)
			return -EIO;
		ctrl->value &= 0x01;
		break;
	case V4L2_CID_VFLIP:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x75)) < 0)
			return -EIO;
		ctrl->value = (ctrl->value & 0x80) ? 1 : 0;
		break;
	case SN9C102_V4L2_CID_GAMMA:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x14)) < 0)
			return -EIO;
		ctrl->value = (ctrl->value & 0x02) ? 1 : 0;
		break;
	case SN9C102_V4L2_CID_BAND_FILTER:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x2d)) < 0)
			return -EIO;
		ctrl->value = (ctrl->value & 0x02) ? 1 : 0;
		break;
	default:
		return -EINVAL;
	}

	return err ? -EIO : 0;
}


static int ov7630_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, 0x10, ctrl->value);
		break;
	case V4L2_CID_RED_BALANCE:
		err += sn9c102_write_reg(cam, ctrl->value, 0x07);
		break;
	case V4L2_CID_BLUE_BALANCE:
		err += sn9c102_write_reg(cam, ctrl->value, 0x06);
		break;
	case SN9C102_V4L2_CID_GREEN_BALANCE:
		err += sn9c102_write_reg(cam, ctrl->value, 0x05);
		break;
	case V4L2_CID_GAIN:
		err += sn9c102_i2c_write(cam, 0x00, ctrl->value);
		break;
	case V4L2_CID_DO_WHITE_BALANCE:
		err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
		break;
	case V4L2_CID_WHITENESS:
		err += sn9c102_i2c_write(cam, 0x0d, ctrl->value);
		break;
	case V4L2_CID_AUTOGAIN:
		err += sn9c102_i2c_write(cam, 0x13, ctrl->value |
						    (ctrl->value << 1));
		break;
	case V4L2_CID_VFLIP:
		err += sn9c102_i2c_write(cam, 0x75, 0x0e | (ctrl->value << 7));
		break;
	case SN9C102_V4L2_CID_GAMMA:
		err += sn9c102_i2c_write(cam, 0x14, ctrl->value << 2);
		break;
	case SN9C102_V4L2_CID_BAND_FILTER:
		err += sn9c102_i2c_write(cam, 0x2d, ctrl->value << 2);
		break;
	default:
		return -EINVAL;
	}

	return err ? -EIO : 0;
}


static int ov7630_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) + 1,
	   v_start = (u8)(rect->top - s->cropcap.bounds.top) + 1;

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

	return err;
}


static int ov7630_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, 0x20, 0x19);
	else
		err += sn9c102_write_reg(cam, 0x50, 0x19);

	return err;
}


static const struct sn9c102_sensor ov7630 = {
	.name = "OV7630",
	.maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
	.supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102 | BRIDGE_SN9C103,
	.sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
	.frequency = SN9C102_I2C_100KHZ,
	.interface = SN9C102_I2C_2WIRES,
	.i2c_slave_id = 0x21,
	.init = &ov7630_init,
	.qctrl = {
		{
			.id = V4L2_CID_GAIN,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "global gain",
			.minimum = 0x00,
			.maximum = 0x3f,
			.step = 0x01,
			.default_value = 0x14,
			.flags = 0,
		},
		{
			.id = V4L2_CID_EXPOSURE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "exposure",
			.minimum = 0x00,
			.maximum = 0xff,
			.step = 0x01,
			.default_value = 0x60,
			.flags = 0,
		},
		{
			.id = V4L2_CID_WHITENESS,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "white balance background: red",
			.minimum = 0x00,
			.maximum = 0x3f,
			.step = 0x01,
			.default_value = 0x20,
			.flags = 0,
		},
		{
			.id = V4L2_CID_DO_WHITE_BALANCE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "white balance background: blue",
			.minimum = 0x00,
			.maximum = 0x3f,
			.step = 0x01,
			.default_value = 0x20,
			.flags = 0,
		},
		{
			.id = V4L2_CID_RED_BALANCE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "red balance",
			.minimum = 0x00,
			.maximum = 0x7f,
			.step = 0x01,
			.default_value = 0x20,
			.flags = 0,
		},
		{
			.id = V4L2_CID_BLUE_BALANCE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "blue balance",
			.minimum = 0x00,
			.maximum = 0x7f,
			.step = 0x01,
			.default_value = 0x20,
			.flags = 0,
		},
		{
			.id = V4L2_CID_AUTOGAIN,
			.type = V4L2_CTRL_TYPE_BOOLEAN,
			.name = "auto adjust",
			.minimum = 0x00,
			.maximum = 0x01,
			.step = 0x01,
			.default_value = 0x00,
			.flags = 0,
		},
		{
			.id = V4L2_CID_VFLIP,
			.type = V4L2_CTRL_TYPE_BOOLEAN,
			.name = "vertical flip",
			.minimum = 0x00,
			.maximum = 0x01,
			.step = 0x01,
			.default_value = 0x01,
			.flags = 0,
		},
		{
			.id = SN9C102_V4L2_CID_GREEN_BALANCE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "green balance",
			.minimum = 0x00,
			.maximum = 0x7f,
			.step = 0x01,
			.default_value = 0x20,
			.flags = 0,
		},
		{
			.id = SN9C102_V4L2_CID_BAND_FILTER,
			.type = V4L2_CTRL_TYPE_BOOLEAN,
			.name = "band filter",
			.minimum = 0x00,
			.maximum = 0x01,
			.step = 0x01,
			.default_value = 0x00,
			.flags = 0,
		},
		{
			.id = SN9C102_V4L2_CID_GAMMA,
			.type = V4L2_CTRL_TYPE_BOOLEAN,
			.name = "rgb gamma",
			.minimum = 0x00,
			.maximum = 0x01,
			.step = 0x01,
			.default_value = 0x00,
			.flags = 0,
		},
	},
	.get_ctrl = &ov7630_get_ctrl,
	.set_ctrl = &ov7630_set_ctrl,
	.cropcap = {
		.bounds = {
			.left = 0,
			.top = 0,
			.width = 640,
			.height = 480,
		},
		.defrect = {
			.left = 0,
			.top = 0,
			.width = 640,
			.height = 480,
		},
	},
	.set_crop = &ov7630_set_crop,
	.pix_format = {
		.width = 640,
		.height = 480,
		.pixelformat = V4L2_PIX_FMT_SN9C10X,
		.priv = 8,
	},
	.set_pix_format = &ov7630_set_pix_format
};


int sn9c102_probe_ov7630(struct sn9c102_device* cam)
{
	int pid, ver, err = 0;

	switch (sn9c102_get_bridge(cam)) {
	case BRIDGE_SN9C101:
	case BRIDGE_SN9C102:
		err = sn9c102_write_const_regs(cam, {0x01, 0x01}, {0x00, 0x01},
					       {0x28, 0x17});
		break;
	case BRIDGE_SN9C103: /* do _not_ change anything! */
		err = sn9c102_write_const_regs(cam, {0x09, 0x01}, {0x42, 0x01},
					       {0x28, 0x17}, {0x44, 0x02});
		pid = sn9c102_i2c_try_read(cam, &ov7630, 0x0a);
		if (err || pid < 0) /* try a different initialization */
			err += sn9c102_write_const_regs(cam, {0x01, 0x01},
							{0x00, 0x01});
		break;
	default:
		break;
	}

	pid = sn9c102_i2c_try_read(cam, &ov7630, 0x0a);
	ver = sn9c102_i2c_try_read(cam, &ov7630, 0x0b);
	if (err || pid < 0 || ver < 0)
		return -EIO;
	if (pid != 0x76 || ver != 0x31)
		return -ENODEV;
	sn9c102_attach_sensor(cam, &ov7630);

	return 0;
}