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); 113