5a7de2408f
The help text for the CAN_ISOTP config symbol uses the acronym "PDU". However, this acronym is not explained here, nor in Documentation/networking/can.rst. Expand the acronym to make it easier for users to decide if they need to enable the CAN_ISOTP option or not. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20201013141341.28487-1-geert+renesas@glider.be Acked-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
76 lines
3.0 KiB
Plaintext
76 lines
3.0 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# Controller Area Network (CAN) network layer core configuration
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#
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menuconfig CAN
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depends on NET
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tristate "CAN bus subsystem support"
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help
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Controller Area Network (CAN) is a slow (up to 1Mbit/s) serial
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communications protocol. Development of the CAN bus started in
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1983 at Robert Bosch GmbH, and the protocol was officially
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released in 1986. The CAN bus was originally mainly for automotive,
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but is now widely used in marine (NMEA2000), industrial, and medical
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applications. More information on the CAN network protocol family
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PF_CAN is contained in <Documentation/networking/can.rst>.
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If you want CAN support you should say Y here and also to the
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specific driver for your controller(s) below.
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if CAN
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config CAN_RAW
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tristate "Raw CAN Protocol (raw access with CAN-ID filtering)"
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default y
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help
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The raw CAN protocol option offers access to the CAN bus via
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the BSD socket API. You probably want to use the raw socket in
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most cases where no higher level protocol is being used. The raw
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socket has several filter options e.g. ID masking / error frames.
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To receive/send raw CAN messages, use AF_CAN with protocol CAN_RAW.
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config CAN_BCM
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tristate "Broadcast Manager CAN Protocol (with content filtering)"
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default y
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help
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The Broadcast Manager offers content filtering, timeout monitoring,
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sending of RTR frames, and cyclic CAN messages without permanent user
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interaction. The BCM can be 'programmed' via the BSD socket API and
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informs you on demand e.g. only on content updates / timeouts.
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You probably want to use the bcm socket in most cases where cyclic
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CAN messages are used on the bus (e.g. in automotive environments).
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To use the Broadcast Manager, use AF_CAN with protocol CAN_BCM.
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config CAN_GW
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tristate "CAN Gateway/Router (with netlink configuration)"
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default y
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help
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The CAN Gateway/Router is used to route (and modify) CAN frames.
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It is based on the PF_CAN core infrastructure for msg filtering and
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msg sending and can optionally modify routed CAN frames on the fly.
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CAN frames can be routed between CAN network interfaces (one hop).
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They can be modified with AND/OR/XOR/SET operations as configured
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by the netlink configuration interface known e.g. from iptables.
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source "net/can/j1939/Kconfig"
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config CAN_ISOTP
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tristate "ISO 15765-2:2016 CAN transport protocol"
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help
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CAN Transport Protocols offer support for segmented Point-to-Point
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communication between CAN nodes via two defined CAN Identifiers.
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As CAN frames can only transport a small amount of data bytes
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(max. 8 bytes for 'classic' CAN and max. 64 bytes for CAN FD) this
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segmentation is needed to transport longer Protocol Data Units (PDU)
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as needed e.g. for vehicle diagnosis (UDS, ISO 14229) or IP-over-CAN
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traffic.
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This protocol driver implements data transfers according to
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ISO 15765-2:2016 for 'classic' CAN and CAN FD frame types.
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If you want to perform automotive vehicle diagnostic services (UDS),
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say 'y'.
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source "drivers/net/can/Kconfig"
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endif
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