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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_FPGA_BRIDGE_H
#define _LINUX_FPGA_BRIDGE_H
#include <linux/device.h>
#include <linux/fpga/fpga-mgr.h>
struct fpga_bridge;
/**
* struct fpga_bridge_ops - ops for low level FPGA bridge drivers
* @enable_show: returns the FPGA bridge's status
* @enable_set: set an FPGA bridge as enabled or disabled
* @fpga_bridge_remove: set FPGA into a specific state during driver remove
* @groups: optional attribute groups.
*/
struct fpga_bridge_ops {
int (*enable_show)(struct fpga_bridge *bridge);
int (*enable_set)(struct fpga_bridge *bridge, bool enable);
void (*fpga_bridge_remove)(struct fpga_bridge *bridge);
const struct attribute_group **groups;
};
/**
* struct fpga_bridge_info - collection of parameters an FPGA Bridge
* @name: fpga bridge name
* @br_ops: pointer to structure of fpga bridge ops
* @priv: fpga bridge private data
*
* fpga_bridge_info contains parameters for the register function. These
* are separated into an info structure because they some are optional
* others could be added to in the future. The info structure facilitates
* maintaining a stable API.
*/
struct fpga_bridge_info {
const char *name;
const struct fpga_bridge_ops *br_ops;
void *priv;
};
/**
* struct fpga_bridge - FPGA bridge structure
* @name: name of low level FPGA bridge
* @dev: FPGA bridge device
* @mutex: enforces exclusive reference to bridge
* @br_ops: pointer to struct of FPGA bridge ops
* @info: fpga image specific information
* @node: FPGA bridge list node
* @priv: low level driver private date
*/
struct fpga_bridge {
const char *name;
struct device dev;
struct mutex mutex; /* for exclusive reference to bridge */
const struct fpga_bridge_ops *br_ops;
struct fpga_image_info *info;
struct list_head node;
void *priv;
};
#define to_fpga_bridge(d) container_of(d, struct fpga_bridge, dev)
struct fpga_bridge *of_fpga_bridge_get(struct device_node *node,
struct fpga_image_info *info);
struct fpga_bridge *fpga_bridge_get(struct device *dev,
struct fpga_image_info *info);
void fpga_bridge_put(struct fpga_bridge *bridge);
int fpga_bridge_enable(struct fpga_bridge *bridge);
int fpga_bridge_disable(struct fpga_bridge *bridge);
int fpga_bridges_enable(struct list_head *bridge_list);
int fpga_bridges_disable(struct list_head *bridge_list);
void fpga_bridges_put(struct list_head *bridge_list);
int fpga_bridge_get_to_list(struct device *dev,
struct fpga_image_info *info,
struct list_head *bridge_list);
int of_fpga_bridge_get_to_list(struct device_node *np,
struct fpga_image_info *info,
struct list_head *bridge_list);
struct fpga_bridge *
fpga_bridge_register(struct device *parent, const char *name,
const struct fpga_bridge_ops *br_ops,
void *priv);
void fpga_bridge_unregister(struct fpga_bridge *br);
#endif /* _LINUX_FPGA_BRIDGE_H */
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