sn9c102_ov7660.c

linux 内核源代码

}


static int ov7660_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_DO_WHITE_BALANCE:
		if ((ctrl->value = sn9c102_read_reg(cam, 0x02)) < 0)
			return -EIO;
		ctrl->value = (ctrl->value & 0x04) ? 1 : 0;
		break;
	case V4L2_CID_RED_BALANCE:
		if ((ctrl->value = sn9c102_read_reg(cam, 0x05)) < 0)
			return -EIO;
		ctrl->value &= 0x7f;
		break;
	case V4L2_CID_BLUE_BALANCE:
		if ((ctrl->value = sn9c102_read_reg(cam, 0x06)) < 0)
			return -EIO;
		ctrl->value &= 0x7f;
		break;
	case SN9C102_V4L2_CID_GREEN_BALANCE:
		if ((ctrl->value = sn9c102_read_reg(cam, 0x07)) < 0)
			return -EIO;
		ctrl->value &= 0x7f;
		break;
	case SN9C102_V4L2_CID_BAND_FILTER:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x3b)) < 0)
			return -EIO;
		ctrl->value &= 0x08;
		break;
	case V4L2_CID_GAIN:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x00)) < 0)
			return -EIO;
		ctrl->value &= 0x1f;
		break;
	case V4L2_CID_AUTOGAIN:
		if ((ctrl->value = sn9c102_i2c_read(cam, 0x13)) < 0)
			return -EIO;
		ctrl->value &= 0x01;
		break;
	default:
		return -EINVAL;
	}

	return err ? -EIO : 0;
}


static int ov7660_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_DO_WHITE_BALANCE:
		err += sn9c102_write_reg(cam, 0x43 | (ctrl->value << 2), 0x02);
		break;
	case V4L2_CID_RED_BALANCE:
		err += sn9c102_write_reg(cam, ctrl->value, 0x05);
		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, 0x07);
		break;
	case SN9C102_V4L2_CID_BAND_FILTER:
		err += sn9c102_i2c_write(cam, ctrl->value << 3, 0x3b);
		break;
	case V4L2_CID_GAIN:
		err += sn9c102_i2c_write(cam, 0x00, 0x60 + ctrl->value);
		break;
	case V4L2_CID_AUTOGAIN:
		err += sn9c102_i2c_write(cam, 0x13, 0xc0 |
						    (ctrl->value * 0x07));
		break;
	default:
		return -EINVAL;
	}

	return err ? -EIO : 0;
}


static int ov7660_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 ov7660_set_pix_format(struct sn9c102_device* cam,
				 const struct v4l2_pix_format* pix)
{
	int r0, err = 0;

	r0 = sn9c102_pread_reg(cam, 0x01);

	if (pix->pixelformat == V4L2_PIX_FMT_JPEG) {
		err += sn9c102_write_reg(cam, r0 | 0x40, 0x01);
		err += sn9c102_write_reg(cam, 0xa2, 0x17);
		err += sn9c102_i2c_write(cam, 0x11, 0x00);
	} else {
		err += sn9c102_write_reg(cam, r0 | 0x40, 0x01);
		err += sn9c102_write_reg(cam, 0xa2, 0x17);
		err += sn9c102_i2c_write(cam, 0x11, 0x0d);
	}

	return err;
}


static const struct sn9c102_sensor ov7660 = {
	.name = "OV7660",
	.maintainer = "Luca Risolia <[e-mail]>",
	.supported_bridge = BRIDGE_SN9C105 | BRIDGE_SN9C120,
	.sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
	.frequency = SN9C102_I2C_100KHZ,
	.interface = SN9C102_I2C_2WIRES,
	.i2c_slave_id = 0x21,
	.init = &ov7660_init,
	.qctrl = {
		{
			.id = V4L2_CID_GAIN,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "global gain",
			.minimum = 0x00,
			.maximum = 0x1f,
			.step = 0x01,
			.default_value = 0x09,
			.flags = 0,
		},
		{
			.id = V4L2_CID_EXPOSURE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "exposure",
			.minimum = 0x00,
			.maximum = 0xff,
			.step = 0x01,
			.default_value = 0x27,
			.flags = 0,
		},
		{
			.id = V4L2_CID_DO_WHITE_BALANCE,
			.type = V4L2_CTRL_TYPE_BOOLEAN,
			.name = "night mode",
			.minimum = 0x00,
			.maximum = 0x01,
			.step = 0x01,
			.default_value = 0x00,
			.flags = 0,
		},
		{
			.id = V4L2_CID_RED_BALANCE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "red balance",
			.minimum = 0x00,
			.maximum = 0x7f,
			.step = 0x01,
			.default_value = 0x14,
			.flags = 0,
		},
		{
			.id = V4L2_CID_BLUE_BALANCE,
			.type = V4L2_CTRL_TYPE_INTEGER,
			.name = "blue balance",
			.minimum = 0x00,
			.maximum = 0x7f,
			.step = 0x01,
			.default_value = 0x14,
			.flags = 0,
		},
		{
			.id = V4L2_CID_AUTOGAIN,
			.type = V4L2_CTRL_TYPE_BOOLEAN,
			.name = "auto adjust",
			.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 = 0x14,
			.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,
		},
	},
	.get_ctrl = &ov7660_get_ctrl,
	.set_ctrl = &ov7660_set_ctrl,
	.cropcap = {
		.bounds = {
			.left = 0,
			.top = 0,
			.width = 640,
			.height = 480,
		},
		.defrect = {
			.left = 0,
			.top = 0,
			.width = 640,
			.height = 480,
		},
	},
	.set_crop = &ov7660_set_crop,
	.pix_format = {
		.width = 640,
		.height = 480,
		.pixelformat = V4L2_PIX_FMT_JPEG,
		.priv = 8,
	},
	.set_pix_format = &ov7660_set_pix_format
};


int sn9c102_probe_ov7660(struct sn9c102_device* cam)
{
	int pid, ver, err;

	err = sn9c102_write_const_regs(cam, {0x01, 0xf1}, {0x00, 0xf1},
				       {0x01, 0x01}, {0x00, 0x01},
				       {0x28, 0x17});

	pid = sn9c102_i2c_try_read(cam, &ov7660, 0x0a);
	ver = sn9c102_i2c_try_read(cam, &ov7660, 0x0b);
	if (err || pid < 0 || ver < 0)
		return -EIO;
	if (pid != 0x76 || ver != 0x60)
		return -ENODEV;

	sn9c102_attach_sensor(cam, &ov7660);

	return 0;
}