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/*
* Greybus connections
*
* Copyright 2014 Google Inc.
* Copyright 2014 Linaro Ltd.
*
* Released under the GPLv2 only.
*/
#ifndef __CONNECTION_H
#define __CONNECTION_H
#include <linux/list.h>
#include <linux/kfifo.h>
enum gb_connection_state {
GB_CONNECTION_STATE_INVALID = 0,
GB_CONNECTION_STATE_DISABLED = 1,
GB_CONNECTION_STATE_ENABLED_TX = 2,
GB_CONNECTION_STATE_ENABLED = 3,
};
struct gb_operation;
typedef int (*gb_request_handler_t)(struct gb_operation *);
struct gb_connection {
struct gb_host_device *hd;
struct gb_interface *intf;
struct gb_bundle *bundle;
struct kref kref;
u16 hd_cport_id;
u16 intf_cport_id;
struct list_head hd_links;
struct list_head bundle_links;
gb_request_handler_t handler;
struct gb_protocol *protocol;
u8 protocol_id;
u8 major;
u8 minor;
u8 module_major;
u8 module_minor;
struct mutex mutex;
spinlock_t lock;
enum gb_connection_state state;
struct list_head operations;
char name[16];
struct workqueue_struct *wq;
atomic_t op_cycle;
void *private;
};
struct gb_connection *gb_connection_create_static(struct gb_host_device *hd,
u16 hd_cport_id, u8 protocol_id);
struct gb_connection *gb_connection_create_dynamic(struct gb_interface *intf,
struct gb_bundle *bundle, u16 cport_id,
u8 protocol_id);
void gb_connection_destroy(struct gb_connection *connection);
static inline bool gb_connection_is_static(struct gb_connection *connection)
{
return !connection->intf;
}
int gb_connection_enable(struct gb_connection *connection,
gb_request_handler_t handler);
static inline int gb_connection_enable_tx(struct gb_connection *connection)
{
return gb_connection_enable(connection, NULL);
}
void gb_connection_disable_rx(struct gb_connection *connection);
void gb_connection_disable(struct gb_connection *connection);
int gb_connection_legacy_init(struct gb_connection *connection);
void gb_connection_legacy_exit(struct gb_connection *connection);
void greybus_data_rcvd(struct gb_host_device *hd, u16 cport_id,
u8 *data, size_t length);
void gb_connection_latency_tag_enable(struct gb_connection *connection);
void gb_connection_latency_tag_disable(struct gb_connection *connection);
#endif /* __CONNECTION_H */
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