---

static int sysconfig_ops_write_init(struct fpga_manager *mgr,
				    struct fpga_image_info *info,
				    const char *buf, size_t count)
{
	struct sysconfig_priv *priv = mgr->priv;
	struct device *dev = &mgr->dev;
	int ret;

	if (info->flags & FPGA_MGR_PARTIAL_RECONFIG) {
		dev_err(dev, "Partial reconfiguration is not supported\n");
		return -EOPNOTSUPP;
	}

	/* Enter program mode */
	ret = sysconfig_refresh(priv);
	if (ret) {
		dev_err(dev, "Failed to go to program mode\n");
		return ret;
	}

	/* Enter ISC mode */
	ret = sysconfig_isc_init(priv);
	if (ret) {
		dev_err(dev, "Failed to go to ISC mode\n");
		return ret;
	}

	/* Initialize the Address Shift Register */
	ret = sysconfig_lsc_init_addr(priv);
	if (ret) {
		dev_err(dev,
			"Failed to initialize the Address Shift Register\n");
		return ret;
	}

	/* Prepare for bitstream burst write */
	ret = sysconfig_burst_write_init(priv);
	if (ret)
		dev_err(dev, "Failed to prepare for bitstream burst write\n");

	return ret;
}

static int sysconfig_ops_write(struct fpga_manager *mgr, const char *buf,
			       size_t count)
{
	return sysconfig_bitstream_burst_write(mgr->priv, buf, count);
}

static int sysconfig_ops_write_complete(struct fpga_manager *mgr,
					struct fpga_image_info *info)
{
	struct sysconfig_priv *priv = mgr->priv;
	struct device *dev = &mgr->dev;
	int ret;

	ret = sysconfig_burst_write_complete(priv);
	if (!ret)
		ret = sysconfig_poll_busy(priv);

	if (ret) {
		dev_err(dev, "Error while waiting bitstream write to finish\n");
		goto fail;
	}

	ret = sysconfig_isc_finish(priv);

fail:
	if (ret)
		sysconfig_cleanup(priv);

	return ret;
}

static const struct fpga_manager_ops sysconfig_fpga_mgr_ops = {
	.state = sysconfig_ops_state,
	.write_init = sysconfig_ops_write_init,
	.write = sysconfig_ops_write,
	.write_complete = sysconfig_ops_write_complete,
};

int sysconfig_probe(struct sysconfig_priv *priv)
{
	struct gpio_desc *program, *init, *done;
	struct device *dev = priv->dev;
	struct fpga_manager *mgr;

	if (!dev)
		return -ENODEV;

	if (!priv->command_transfer ||
	    !priv->bitstream_burst_write_init ||
	    !priv->bitstream_burst_write ||
	    !priv->bitstream_burst_write_complete) {
		dev_err(dev, "Essential callback is missing\n");
		return -EINVAL;
	}

	program = devm_gpiod_get_optional(dev, "program", GPIOD_OUT_LOW);
	if (IS_ERR(program))
		return dev_err_probe(dev, PTR_ERR(program),
				     "Failed to get PROGRAM GPIO\n");

	init = devm_gpiod_get_optional(dev, "init", GPIOD_IN);
	if (IS_ERR(init))
		return dev_err_probe(dev, PTR_ERR(init),
				     "Failed to get INIT GPIO\n");

	done = devm_gpiod_get_optional(dev, "done", GPIOD_IN);
	if (IS_ERR(done))
		return dev_err_probe(dev, PTR_ERR(done),
				     "Failed to get DONE GPIO\n");

	priv->program = program;
	priv->init = init;
	priv->done = done;

	mgr = devm_fpga_mgr_register(dev, "Lattice sysCONFIG FPGA Manager",
				     &sysconfig_fpga_mgr_ops, priv);

	return PTR_ERR_OR_ZERO(mgr);
}
EXPORT_SYMBOL(sysconfig_probe);

MODULE_DESCRIPTION("Lattice sysCONFIG FPGA Manager Core");
MODULE_LICENSE("GPL");