1 # SPDX-License-Identifier: GPL-2.0-only
3 # Controller Area Network (CAN) network layer core configuration
7 tristate "CAN bus subsystem support"
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>.
17 If you want CAN support you should say Y here and also to the
18 specific driver for your controller(s) below.
23 tristate "Raw CAN Protocol (raw access with CAN-ID filtering)"
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.
33 tristate "Broadcast Manager CAN Protocol (with content filtering)"
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.
45 tristate "CAN Gateway/Router (with netlink configuration)"
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.
55 source "net/can/j1939/Kconfig"
58 tristate "ISO 15765-2:2016 CAN transport protocol"
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
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),
72 source "drivers/net/can/Kconfig"