drivers/staging/greybus/connection.h

   1 /*
   2  * Greybus connections
   3  *
   4  * Copyright 2014 Google Inc.
   5  *
   6  * Released under the GPLv2 only.
   7  */
   8
   9 #ifndef __CONNECTION_H
  10 #define __CONNECTION_H
  11
  12 #include <linux/list.h>
  13
  14 #include "greybus.h"
  15
  16 enum gb_connection_state {
  17         GB_CONNECTION_STATE_INVALID     = 0,
  18         GB_CONNECTION_STATE_DISABLED    = 1,
  19         GB_CONNECTION_STATE_ENABLED     = 2,
  20         GB_CONNECTION_STATE_ERROR       = 3,
  21         GB_CONNECTION_STATE_DESTROYING  = 4,
  22 };
  23
  24 struct gb_connection {
  25         struct greybus_host_device      *hd;
  26         struct gb_interface             *interface;
  27         struct device                   dev;
  28         u16                             hd_cport_id;
  29         u16                             interface_cport_id;
  30
  31         struct list_head                hd_links;
  32         struct list_head                interface_links;
  33
  34         struct gb_protocol              *protocol;
  35
  36         enum gb_connection_state        state;
  37
  38         u16                             op_cycle;
  39         struct list_head                operations;
  40         struct list_head                pending;        /* awaiting reponse */
  41
  42         void                            *private;
  43 };
  44 #define to_gb_connection(d) container_of(d, struct gb_connection, dev)
  45
  46 struct gb_connection *gb_connection_create(struct gb_interface *interface,
  47                                 u16 cport_id, u8 protocol_id);
  48 void gb_connection_destroy(struct gb_connection *connection);
  49
  50 int gb_connection_init(struct gb_connection *connection);
  51 void gb_connection_exit(struct gb_connection *connection);
  52
  53 struct gb_connection *gb_hd_connection_find(struct greybus_host_device *hd,
  54                                 u16 cport_id);
  55
  56 void greybus_cport_in(struct greybus_host_device *hd, u16 cport_id,
  57                         u8 *data, size_t length);
  58 __printf(2, 3)
  59 void gb_connection_err(struct gb_connection *connection, const char *fmt, ...);
  60
  61 #endif /* __CONNECTION_H */