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 | |