/* 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
* @ br_ops_owner : module containing the br_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 module *br_ops_owner;
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);
#define fpga_bridge_register(parent, name, br_ops, priv) \
__fpga_bridge_register(parent, name, br_ops, priv, THIS_MODULE)
struct fpga_bridge *
__fpga_bridge_register(struct device *parent, const char *name,
const struct fpga_bridge_ops *br_ops, void *priv,
struct module *owner);
void fpga_bridge_unregister(struct fpga_bridge *br);
#endif /* _LINUX_FPGA_BRIDGE_H */
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