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/*
* Greybus connections
*
* Copyright 2014 Google Inc.
*
* Released under the GPLv2 only.
*/
#ifndef __CONNECTION_H
#define __CONNECTION_H
#include <linux/list.h>
#include "greybus.h"
enum gb_connection_state {
GB_CONNECTION_STATE_INVALID = 0,
GB_CONNECTION_STATE_DISABLED = 1,
GB_CONNECTION_STATE_ENABLED = 2,
GB_CONNECTION_STATE_ERROR = 3,
GB_CONNECTION_STATE_DESTROYING = 4,
};
struct gb_connection;
typedef int (*gb_connection_init_t)(struct gb_connection *);
typedef void (*gb_connection_exit_t)(struct gb_connection *);
struct gb_connection_handler {
gb_connection_init_t connection_init;
gb_connection_exit_t connection_exit;
};
struct gb_connection {
struct greybus_host_device *hd;
struct gb_interface *interface;
struct device dev;
u16 hd_cport_id;
u16 interface_cport_id;
struct rb_node hd_node;
struct list_head interface_links;
enum greybus_protocol protocol;
enum gb_connection_state state;
struct list_head operations;
struct rb_root pending; /* awaiting reponse */
atomic_t op_cycle;
struct delayed_work timeout_work;
struct gb_connection_handler *handler;
void *private;
};
#define to_gb_connection(d) container_of(d, struct gb_connection, dev)
struct gb_connection *gb_connection_create(struct gb_interface *interface,
u16 cport_id, enum greybus_protocol protocol);
void gb_connection_destroy(struct gb_connection *connection);
int gb_connection_init(struct gb_connection *connection);
void gb_connection_exit(struct gb_connection *connection);
struct gb_connection *gb_hd_connection_find(struct greybus_host_device *hd,
u16 cport_id);
u16 gb_connection_operation_id(struct gb_connection *connection);
__printf(2, 3)
void gb_connection_err(struct gb_connection *connection, const char *fmt, ...);
#endif /* __CONNECTION_H */
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