drivers/staging/greybus/connection.h

   1 /*
   2  * Greybus connections
   3  *
   4  * Copyright 2014 Google Inc.
   5  * Copyright 2014 Linaro Ltd.
   6  *
   7  * Released under the GPLv2 only.
   8  */
   9
  10 #ifndef __CONNECTION_H
  11 #define __CONNECTION_H
  12
  13 #include <linux/list.h>
  14
  15 enum gb_connection_state {
  16         GB_CONNECTION_STATE_INVALID     = 0,
  17         GB_CONNECTION_STATE_DISABLED    = 1,
  18         GB_CONNECTION_STATE_ENABLED     = 2,
  19         GB_CONNECTION_STATE_ERROR       = 3,
  20         GB_CONNECTION_STATE_DESTROYING  = 4,
  21 };
  22
  23 struct gb_connection {
  24         struct greybus_host_device      *hd;
  25         struct gb_bundle                *bundle;
  26         struct device                   dev;
  27         u16                             hd_cport_id;
  28         u16                             intf_cport_id;
  29
  30         struct list_head                hd_links;
  31         struct list_head                bundle_links;
  32
  33         struct gb_protocol              *protocol;
  34         u8                              protocol_id;
  35         u8                              major;
  36         u8                              minor;
  37         u8                              module_major;
  38         u8                              module_minor;
  39
  40         spinlock_t                      lock;
  41         enum gb_connection_state        state;
  42         struct list_head                operations;
  43
  44         struct workqueue_struct         *wq;
  45
  46         atomic_t                        op_cycle;
  47
  48         void                            *private;
  49 };
  50 #define to_gb_connection(d) container_of(d, struct gb_connection, dev)
  51
  52 int svc_update_connection(struct gb_interface *intf,
  53                           struct gb_connection *connection);
  54 struct gb_connection *gb_connection_create(struct gb_bundle *bundle,
  55                                 u16 cport_id, u8 protocol_id);
  56 struct gb_connection *gb_connection_create_range(struct greybus_host_device *hd,
  57                            struct gb_bundle *bundle, struct device *parent,
  58                            u16 cport_id, u8 protocol_id, u32 ida_start,
  59                            u32 ida_end);
  60 void gb_connection_destroy(struct gb_connection *connection);
  61
  62 int gb_connection_init(struct gb_connection *connection);
  63 void gb_connection_exit(struct gb_connection *connection);
  64 void gb_hd_connections_exit(struct greybus_host_device *hd);
  65
  66 void greybus_data_rcvd(struct greybus_host_device *hd, u16 cport_id,
  67                         u8 *data, size_t length);
  68
  69 void gb_connection_bind_protocol(struct gb_connection *connection);
  70
  71 #endif /* __CONNECTION_H */