1# SPDX-License-Identifier: GPL-2.0-only
2#
3# Controller Area Network (CAN) network layer core configuration
4#
5
6menuconfig CAN
7	tristate "CAN bus subsystem support"
8	help
9	  Controller Area Network (CAN) is a slow (up to 1Mbit/s) serial
10	  communications protocol. Development of the CAN bus started in
11	  1983 at Robert Bosch GmbH, and the protocol was officially
12	  released in 1986. The CAN bus was originally mainly for automotive,
13	  but is now widely used in marine (NMEA2000), industrial, and medical
14	  applications. More information on the CAN network protocol family
15	  PF_CAN is contained in <Documentation/networking/can.rst>.
16
17	  If you want CAN support you should say Y here and also to the
18	  specific driver for your controller(s) below.
19
20if CAN
21
22config CAN_RAW
23	tristate "Raw CAN Protocol (raw access with CAN-ID filtering)"
24	default y
25	help
26	  The raw CAN protocol option offers access to the CAN bus via
27	  the BSD socket API. You probably want to use the raw socket in
28	  most cases where no higher level protocol is being used. The raw
29	  socket has several filter options e.g. ID masking / error frames.
30	  To receive/send raw CAN messages, use AF_CAN with protocol CAN_RAW.
31
32config CAN_BCM
33	tristate "Broadcast Manager CAN Protocol (with content filtering)"
34	default y
35	help
36	  The Broadcast Manager offers content filtering, timeout monitoring,
37	  sending of RTR frames, and cyclic CAN messages without permanent user
38	  interaction. The BCM can be 'programmed' via the BSD socket API and
39	  informs you on demand e.g. only on content updates / timeouts.
40	  You probably want to use the bcm socket in most cases where cyclic
41	  CAN messages are used on the bus (e.g. in automotive environments).
42	  To use the Broadcast Manager, use AF_CAN with protocol CAN_BCM.
43
44config CAN_GW
45	tristate "CAN Gateway/Router (with netlink configuration)"
46	default y
47	help
48	  The CAN Gateway/Router is used to route (and modify) CAN frames.
49	  It is based on the PF_CAN core infrastructure for msg filtering and
50	  msg sending and can optionally modify routed CAN frames on the fly.
51	  CAN frames can be routed between CAN network interfaces (one hop).
52	  They can be modified with AND/OR/XOR/SET operations as configured
53	  by the netlink configuration interface known e.g. from iptables.
54
55source "net/can/j1939/Kconfig"
56
57config CAN_ISOTP
58	tristate "ISO 15765-2:2016 CAN transport protocol"
59	help
60	  CAN Transport Protocols offer support for segmented Point-to-Point
61	  communication between CAN nodes via two defined CAN Identifiers.
62	  As CAN frames can only transport a small amount of data bytes
63	  (max. 8 bytes for 'classic' CAN and max. 64 bytes for CAN FD) this
64	  segmentation is needed to transport longer Protocol Data Units (PDU)
65	  as needed e.g. for vehicle diagnosis (UDS, ISO 14229) or IP-over-CAN
66	  traffic.
67	  This protocol driver implements data transfers according to
68	  ISO 15765-2:2016 for 'classic' CAN and CAN FD frame types.
69	  If you want to perform automotive vehicle diagnostic services (UDS),
70	  say 'y'.
71
72source "drivers/net/can/Kconfig"
73
74endif
75