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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 Xilinx, Inc.
*/
#include <linux/dma-mapping.h>
#include <linux/fpga/fpga-mgr.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/string.h>
#include <linux/firmware/xlnx-zynqmp.h>
/* Constant Definitions */
#define IXR_FPGA_DONE_MASK BIT(3)
/**
* struct zynqmp_fpga_priv - Private data structure
* @dev: Device data structure
* @flags: flags which is used to identify the bitfile type
*/
struct zynqmp_fpga_priv {
struct device *dev;
u32 flags;
};
static int zynqmp_fpga_ops_write_init(struct fpga_manager *mgr,
struct fpga_image_info *info,
const char *buf, size_t size)
{
struct zynqmp_fpga_priv *priv;
priv = mgr->priv;
priv->flags = info->flags;
return 0;
}
static int zynqmp_fpga_ops_write(struct fpga_manager *mgr,
const char *buf, size_t size)
{
struct zynqmp_fpga_priv *priv;
dma_addr_t dma_addr;
u32 eemi_flags = 0;
char *kbuf;
int ret;
priv = mgr->priv;
kbuf = dma_alloc_coherent(priv->dev, size, &dma_addr, GFP_KERNEL);
if (!kbuf)
return -ENOMEM;
memcpy(kbuf, buf, size);
wmb(); /* ensure all writes are done before initiate FW call */
if (priv->flags & FPGA_MGR_PARTIAL_RECONFIG)
eemi_flags |= XILINX_ZYNQMP_PM_FPGA_PARTIAL;
ret = zynqmp_pm_fpga_load(dma_addr, size, eemi_flags);
dma_free_coherent(priv->dev, size, kbuf, dma_addr);
return ret;
}
static enum fpga_mgr_states zynqmp_fpga_ops_state(struct fpga_manager *mgr)
{
u32 status = 0;
zynqmp_pm_fpga_get_status(&status);
if (status & IXR_FPGA_DONE_MASK)
return FPGA_MGR_STATE_OPERATING;
return FPGA_MGR_STATE_UNKNOWN;
}
static ssize_t status_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u32 status;
int ret;
ret = zynqmp_pm_fpga_get_config_status(&status);
if (ret)
return ret;
return sysfs_emit(buf, "0x%x\n", status);
}
static DEVICE_ATTR_RO(status);
static struct attribute *zynqmp_fpga_attrs[] = {
&dev_attr_status.attr,
NULL,
};
ATTRIBUTE_GROUPS(zynqmp_fpga);
static const struct fpga_manager_ops zynqmp_fpga_ops = {
.state = zynqmp_fpga_ops_state,
.write_init = zynqmp_fpga_ops_write_init,
.write = zynqmp_fpga_ops_write,
};
static int zynqmp_fpga_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct zynqmp_fpga_priv *priv;
struct fpga_manager *mgr;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev = dev;
mgr = devm_fpga_mgr_register(dev, "Xilinx ZynqMP FPGA Manager",
&zynqmp_fpga_ops, priv);
return PTR_ERR_OR_ZERO(mgr);
}
#ifdef CONFIG_OF
static const struct of_device_id zynqmp_fpga_of_match[] = {
{ .compatible = "xlnx,zynqmp-pcap-fpga", },
{},
};
MODULE_DEVICE_TABLE(of, zynqmp_fpga_of_match);
#endif
static struct platform_driver zynqmp_fpga_driver = {
.probe = zynqmp_fpga_probe,
.driver = {
.name = "zynqmp_fpga_manager",
.of_match_table = of_match_ptr(zynqmp_fpga_of_match),
.dev_groups = zynqmp_fpga_groups,
},
};
module_platform_driver(zynqmp_fpga_driver);
MODULE_AUTHOR("Nava kishore Manne <navam@xilinx.com>");
MODULE_DESCRIPTION("Xilinx ZynqMp FPGA Manager");
MODULE_LICENSE("GPL");
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