include/linux/fpga/fpga-bridge.h

   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 int fpga_bridge_register(struct device *dev, const char *name,
  66                          const struct fpga_bridge_ops *br_ops, void *priv);
  67 void fpga_bridge_unregister(struct device *dev);
  68
  69 #endif /* _LINUX_FPGA_BRIDGE_H */