LXR qemu/net/can/can

   1/*
   2 * CAN generic CAN host connection support
   3 *
   4 * Copyright (c) 2013-2014 Jin Yang
   5 * Copyright (c) 2014-2018 Pavel Pisa
   6 *
   7 * Initial development supported by Google GSoC 2013 from RTEMS project slot
   8 *
   9 * Permission is hereby granted, free of charge, to any person obtaining a copy
  10 * of this software and associated documentation files (the "Software"), to deal
  11 * in the Software without restriction, including without limitation the rights
  12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13 * copies of the Software, and to permit persons to whom the Software is
  14 * furnished to do so, subject to the following conditions:
  15 *
  16 * The above copyright notice and this permission notice shall be included in
  17 * all copies or substantial portions of the Software.
  18 *
  19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25 * THE SOFTWARE.
  26 */
  27#include "qemu/osdep.h"
  28#include "chardev/char.h"
  29#include "qemu/sockets.h"
  30#include "qapi/error.h"
  31#include "qom/object_interfaces.h"
  32#include "net/can_emu.h"
  33#include "net/can_host.h"
  34
  35struct CanBusState {
  36    Object object;
  37
  38    QTAILQ_HEAD(, CanBusClientState) clients;
  39};
  40
  41static void can_host_disconnect(CanHostState *ch)
  42{
  43    CanHostClass *chc = CAN_HOST_GET_CLASS(ch);
  44
  45    can_bus_remove_client(&ch->bus_client);
  46    chc->disconnect(ch);
  47}
  48
  49static void can_host_connect(CanHostState *ch, Error **errp)
  50{
  51    CanHostClass *chc = CAN_HOST_GET_CLASS(ch);
  52    Error *local_err = NULL;
  53
  54    chc->connect(ch, &local_err);
  55    if (local_err) {
  56        error_propagate(errp, local_err);
  57        return;
  58    }
  59
  60    can_bus_insert_client(ch->bus, &ch->bus_client);
  61}
  62
  63static void can_host_unparent(Object *obj)
  64{
  65    can_host_disconnect(CAN_HOST(obj));
  66}
  67
  68static void can_host_complete(UserCreatable *uc, Error **errp)
  69{
  70    can_host_connect(CAN_HOST(uc), errp);
  71}
  72
  73static void can_host_instance_init(Object *obj)
  74{
  75    CanHostState *ch = CAN_HOST(obj);
  76
  77    object_property_add_link(obj, "canbus", TYPE_CAN_BUS,
  78                             (Object **)&ch->bus,
  79                             object_property_allow_set_link,
  80                             OBJ_PROP_LINK_STRONG,
  81                             &error_abort);
  82}
  83
  84static void can_host_class_init(ObjectClass *klass,
  85                                void *class_data G_GNUC_UNUSED)
  86{
  87    UserCreatableClass *uc_klass = USER_CREATABLE_CLASS(klass);
  88
  89    klass->unparent = can_host_unparent;
  90    uc_klass->complete = can_host_complete;
  91}
  92
  93static const TypeInfo can_host_info = {
  94    .parent = TYPE_OBJECT,
  95    .name = TYPE_CAN_HOST,
  96    .instance_size = sizeof(CanHostState),
  97    .class_size = sizeof(CanHostClass),
  98    .abstract = true,
  99    .instance_init = can_host_instance_init,
 100    .class_init = can_host_class_init,
 101    .interfaces = (InterfaceInfo[]) {
 102        { TYPE_USER_CREATABLE },
 103        { }
 104    }
 105};
 106
 107static void can_host_register_types(void)
 108{
 109    type_register_static(&can_host_info);
 110}
 111
 112type_init(can_host_register_types);
 113