---

static int sysconfig_bitstream_burst_write(struct sysconfig_priv *priv,
					   const char *buf, size_t count)
{
	int ret = priv->bitstream_burst_write(priv, buf, count);

	if (ret)
		sysconfig_burst_write_complete(priv);

	return ret;
}

static int sysconfig_isc_disable(struct sysconfig_priv *priv)
{
	const u8 isc_disable[] = SYSCONFIG_ISC_DISABLE;

printk("%s(%d) cmd=0x%X 0x%X 0x%X 0x%X \n",__FUNCTION__,__LINE__,isc_disable[0],isc_disable[1],isc_disable[2],isc_disable[3]);
	return sysconfig_cmd_write(priv, isc_disable, sizeof(isc_disable));
}

static void sysconfig_cleanup(struct sysconfig_priv *priv)
{
	sysconfig_isc_erase(priv);
	sysconfig_refresh(priv);
}

static int sysconfig_isc_finish(struct sysconfig_priv *priv)
{
	struct gpio_desc *done_gpio = priv->done;
	u64 status;
	int ret;

        printk("%s(%d) done_gpio=%p\n",__FUNCTION__,__LINE__,done_gpio);
	if (done_gpio) {
		ret = sysconfig_isc_disable(priv);
        printk("%s(%d) ret=%d \n",__FUNCTION__,__LINE__,ret);
		if (ret)
			return ret;

		return sysconfig_poll_gpio(done_gpio, true);
	}

	ret = sysconfig_poll_status(priv, &status);
        printk("%s(%d) ret=%d status=0x%llX\n",__FUNCTION__,__LINE__,ret,status);
	if (ret)
		return ret;

	if ((status & SYSCONFIG_STATUS_DONE) &&
	    !(status & SYSCONFIG_STATUS_BUSY) &&
	    !(status & SYSCONFIG_STATUS_ERR))
		return sysconfig_isc_disable(priv);

	return -EFAULT;
}

static enum fpga_mgr_states sysconfig_ops_state(struct fpga_manager *mgr)
{
	struct sysconfig_priv *priv = mgr->priv;
	struct gpio_desc *done = priv->done;
	u64 status;
	int ret;

	if (done && (gpiod_get_value(done) > 0))
		return FPGA_MGR_STATE_OPERATING;

	ret = sysconfig_read_status(priv, &status);
	if (!ret && (status & SYSCONFIG_STATUS_DONE))
		return FPGA_MGR_STATE_OPERATING;

	return FPGA_MGR_STATE_UNKNOWN;
}

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;

printk("%s(%d)\n",__FUNCTION__,__LINE__);
	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);
printk("%s(%d) ret=%d\n",__FUNCTION__,__LINE__,ret);
	if (ret) {
		dev_err(dev, "Failed to go to program mode\n");
		return ret;
	}
#ifndef MY_CODE
	ret = sysconfig_activation_key(priv);
	if (ret) {
		dev_err(dev, "Failed set activation key\n");
		return ret;
	}
#if 0
	ret =sysconfig_lsc_device_control(priv);
	if (ret) {
		dev_err(dev, "Failed set lsc device control\n");
		return ret;
	}
#endif
	ret = sysconfig_read_idcode(priv);
#endif
	/* Enter ISC mode */
	ret = sysconfig_isc_init(priv);
printk("%s(%d) ret=%d\n",__FUNCTION__,__LINE__,ret);
	if (ret) {
		dev_err(dev, "Failed to go to ISC mode\n");
		return ret;
	}
//#ifdef MY_CODE
	/* Initialize the Address Shift Register */
	ret = sysconfig_lsc_init_addr(priv);
printk("%s(%d) ret=%d\n",__FUNCTION__,__LINE__,ret);
	if (ret) {
		dev_err(dev,
			"Failed to initialize the Address Shift Register\n");
		return ret;
	}
//#endif
	/* Prepare for bitstream burst write */
	ret = sysconfig_burst_write_init(priv);
printk("%s(%d) ret=%d\n",__FUNCTION__,__LINE__,ret);
	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);
printk("%s(%d) ret=%d\n",__FUNCTION__,__LINE__,ret);
	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);
printk("%s(%d) ret=%d\n",__FUNCTION__,__LINE__,ret);

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");