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