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