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 35 struct CanBusState { 36 Object object; 37 38 QTAILQ_HEAD(, CanBusClientState) clients; 39 }; 40 41 static 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 49 static 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 63 static void can_host_unparent(Object *obj) 64 { 65 can_host_disconnect(CAN_HOST(obj)); 66 } 67 68 static void can_host_complete(UserCreatable *uc, Error **errp) 69 { 70 can_host_connect(CAN_HOST(uc), errp); 71 } 72 73 static 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_UNREF_ON_RELEASE, 81 &error_abort); 82 } 83 84 static 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 93 static 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 }; 106 107 static void can_host_register_types(void) 108 { 109 type_register_static(&can_host_info); 110 } 111 112 type_init(can_host_register_types); 113