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
  28#include "qemu/osdep.h"
  29#include "chardev/char.h"
  30#include "qemu/module.h"
  31#include "qemu/sockets.h"
  32#include "qapi/error.h"
  33#include "qom/object_interfaces.h"
  34#include "net/can_emu.h"
  35#include "net/can_host.h"
  36
  37struct CanBusState {
  38    Object object;
  39
  40    QTAILQ_HEAD(, CanBusClientState) clients;
  41};
  42
  43static void can_host_disconnect(CanHostState *ch)
  44{
  45    CanHostClass *chc = CAN_HOST_GET_CLASS(ch);
  46
  47    can_bus_remove_client(&ch->bus_client);
  48    chc->disconnect(ch);
  49}
  50
  51static void can_host_connect(CanHostState *ch, Error **errp)
  52{
  53    CanHostClass *chc = CAN_HOST_GET_CLASS(ch);
  54    Error *local_err = NULL;
  55
  56    if (ch->bus == NULL) {
  57        error_setg(errp, "'canbus' property not set");
  58        return;
  59    }
  60
  61    chc->connect(ch, &local_err);
  62    if (local_err) {
  63        error_propagate(errp, local_err);
  64        return;
  65    }
  66
  67    can_bus_insert_client(ch->bus, &ch->bus_client);
  68}
  69
  70static void can_host_unparent(Object *obj)
  71{
  72    can_host_disconnect(CAN_HOST(obj));
  73}
  74
  75static void can_host_complete(UserCreatable *uc, Error **errp)
  76{
  77    can_host_connect(CAN_HOST(uc), errp);
  78}
  79
  80static void can_host_class_init(ObjectClass *klass,
  81                                void *class_data G_GNUC_UNUSED)
  82{
  83    UserCreatableClass *uc_klass = USER_CREATABLE_CLASS(klass);
  84
  85    object_class_property_add_link(klass, "canbus", TYPE_CAN_BUS,
  86                                   offsetof(CanHostState, bus),
  87                                   object_property_allow_set_link,
  88                                   OBJ_PROP_LINK_STRONG);
  89
  90    klass->unparent = can_host_unparent;
  91    uc_klass->complete = can_host_complete;
  92}
  93
  94static const TypeInfo can_host_info = {
  95    .parent = TYPE_OBJECT,
  96    .name = TYPE_CAN_HOST,
  97    .instance_size = sizeof(CanHostState),
  98    .class_size = sizeof(CanHostClass),
  99    .abstract = true,
 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