1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef _LINUX_FPGA_BRIDGE_H 4 #define _LINUX_FPGA_BRIDGE_H 5 6 #include <linux/device.h> 7 #include <linux/fpga/fpga-mgr.h> 8 9 struct fpga_bridge; 10 11 /** 12 * struct fpga_bridge_ops - ops for low level FPGA bridge drivers 13 * @enable_show: returns the FPGA bridge's status 14 * @enable_set: set a FPGA bridge as enabled or disabled 15 * @fpga_bridge_remove: set FPGA into a specific state during driver remove 16 * @groups: optional attribute groups. 17 */ 18 struct fpga_bridge_ops { 19 int (*enable_show)(struct fpga_bridge *bridge); 20 int (*enable_set)(struct fpga_bridge *bridge, bool enable); 21 void (*fpga_bridge_remove)(struct fpga_bridge *bridge); 22 const struct attribute_group **groups; 23 }; 24 25 /** 26 * struct fpga_bridge - FPGA bridge structure 27 * @name: name of low level FPGA bridge 28 * @dev: FPGA bridge device 29 * @mutex: enforces exclusive reference to bridge 30 * @br_ops: pointer to struct of FPGA bridge ops 31 * @info: fpga image specific information 32 * @node: FPGA bridge list node 33 * @priv: low level driver private date 34 */ 35 struct fpga_bridge { 36 const char *name; 37 struct device dev; 38 struct mutex mutex; /* for exclusive reference to bridge */ 39 const struct fpga_bridge_ops *br_ops; 40 struct fpga_image_info *info; 41 struct list_head node; 42 void *priv; 43 }; 44 45 #define to_fpga_bridge(d) container_of(d, struct fpga_bridge, dev) 46 47 struct fpga_bridge *of_fpga_bridge_get(struct device_node *node, 48 struct fpga_image_info *info); 49 struct fpga_bridge *fpga_bridge_get(struct device *dev, 50 struct fpga_image_info *info); 51 void fpga_bridge_put(struct fpga_bridge *bridge); 52 int fpga_bridge_enable(struct fpga_bridge *bridge); 53 int fpga_bridge_disable(struct fpga_bridge *bridge); 54 55 int fpga_bridges_enable(struct list_head *bridge_list); 56 int fpga_bridges_disable(struct list_head *bridge_list); 57 void fpga_bridges_put(struct list_head *bridge_list); 58 int fpga_bridge_get_to_list(struct device *dev, 59 struct fpga_image_info *info, 60 struct list_head *bridge_list); 61 int of_fpga_bridge_get_to_list(struct device_node *np, 62 struct fpga_image_info *info, 63 struct list_head *bridge_list); 64 65 struct fpga_bridge *fpga_bridge_create(struct device *dev, const char *name, 66 const struct fpga_bridge_ops *br_ops, 67 void *priv); 68 void fpga_bridge_free(struct fpga_bridge *br); 69 int fpga_bridge_register(struct fpga_bridge *br); 70 void fpga_bridge_unregister(struct fpga_bridge *br); 71 72 struct fpga_bridge 73 *devm_fpga_bridge_create(struct device *dev, const char *name, 74 const struct fpga_bridge_ops *br_ops, void *priv); 75 76 #endif /* _LINUX_FPGA_BRIDGE_H */ 77