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 chc->connect(ch, &local_err); 57 if (local_err) { 58 error_propagate(errp, local_err); 59 return; 60 } 61 62 can_bus_insert_client(ch->bus, &ch->bus_client); 63 } 64 65 static void can_host_unparent(Object *obj) 66 { 67 can_host_disconnect(CAN_HOST(obj)); 68 } 69 70 static void can_host_complete(UserCreatable *uc, Error **errp) 71 { 72 can_host_connect(CAN_HOST(uc), errp); 73 } 74 75 static void can_host_instance_init(Object *obj) 76 { 77 CanHostState *ch = CAN_HOST(obj); 78 79 object_property_add_link(obj, "canbus", TYPE_CAN_BUS, 80 (Object **)&ch->bus, 81 object_property_allow_set_link, 82 OBJ_PROP_LINK_STRONG, 83 &error_abort); 84 } 85 86 static void can_host_class_init(ObjectClass *klass, 87 void *class_data G_GNUC_UNUSED) 88 { 89 UserCreatableClass *uc_klass = USER_CREATABLE_CLASS(klass); 90 91 klass->unparent = can_host_unparent; 92 uc_klass->complete = can_host_complete; 93 } 94 95 static const TypeInfo can_host_info = { 96 .parent = TYPE_OBJECT, 97 .name = TYPE_CAN_HOST, 98 .instance_size = sizeof(CanHostState), 99 .class_size = sizeof(CanHostClass), 100 .abstract = true, 101 .instance_init = can_host_instance_init, 102 .class_init = can_host_class_init, 103 .interfaces = (InterfaceInfo[]) { 104 { TYPE_USER_CREATABLE }, 105 { } 106 } 107 }; 108 109 static void can_host_register_types(void) 110 { 111 type_register_static(&can_host_info); 112 } 113 114 type_init(can_host_register_types); 115