qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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can_host.c (3362B)

      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 
     37 struct CanBusState {
     38     Object object;
     39 
     40     QTAILQ_HEAD(, CanBusClientState) clients;
     41 };
     42 
     43 static 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 
     51 static 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 
     70 static void can_host_unparent(Object *obj)
     71 {
     72     can_host_disconnect(CAN_HOST(obj));
     73 }
     74 
     75 static void can_host_complete(UserCreatable *uc, Error **errp)
     76 {
     77     can_host_connect(CAN_HOST(uc), errp);
     78 }
     79 
     80 static 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 
     94 static 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 
    107 static void can_host_register_types(void)
    108 {
    109     type_register_static(&can_host_info);
    110 }
    111 
    112 type_init(can_host_register_types);