Hello Christoph,
are you already aware of this LIN project that uses the Linux SocketCAN
infrastructure and implements the LIN protocol based on a serial tty
adaption (which the serial LIN protocol mainly is)?
https://github.com/lin-bus
IIRC the implementation of the master/slave timings was the biggest
challenge and your approach seems to offload this problem to your
USB-attached hardware right?
Can I assume there will be a similar CAN-controlled programming
interface to create real time master/slave protocol frames like in a
usual CAN/LIN adapter (e.g.
https://www.peak-system.com/PCAN-LIN.213.0.html) ??
Best regards,
Oliver
On 27.11.22 20:02, Christoph Fritz wrote:
The intention of this series is to kick off a discussion about how to
support LIN (ISO 17987) [0] in Linux.
This series consist of two patches which are two individual proposals
for adding LIN abstraction into the kernel.
One approach is to add LIN ontop of CANFD:
[RFC] can: introduce LIN abstraction
The other approach is adding a new type of CAN-socket:
[RFC] can: Add LIN proto skeleton
These patches are abstracting LIN so that actual device drivers can
make use of it.
For reference, the LIN-ontop-of-CANFD variant already has a device
driver using it (not part of this series). It is a specially built USB
LIN-BUS adapter hardware called hexLIN [1]. Its purpose is mainly to
test, adapt and discuss different LIN APIs for mainline Linux kernel.
But it can already be used productively as a Linux LIN node in
controller (master) and responder (slave) mode. By sysfs, hexLIN
supports different checksum calculations and setting up a
responder-table.
For more info about hexLIN, see link below [1].
We are looking for partners with Linux based LIN projects for funding.
[0]: https://en.wikipedia.org/wiki/Local_Interconnect_Network
[1]: https://hexdev.de/hexlin/
Christoph Fritz (1):
[RFC] can: Introduce LIN bus as CANFD abstraction
Richard Weinberger (1):
[RFC] can: Add LIN proto skeleton
drivers/net/can/Kconfig | 10 ++
drivers/net/can/Makefile | 1 +
drivers/net/can/lin.c | 181 +++++++++++++++++++++++++++
include/net/lin.h | 30 +++++
include/uapi/linux/can.h | 8 +-
include/uapi/linux/can/lin.h | 15 +++
include/uapi/linux/can/netlink.h | 1 +
net/can/Kconfig | 5 +
net/can/Makefile | 3 +
net/can/lin.c | 207 +++++++++++++++++++++++++++++++
10 files changed, 460 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/can/lin.c
create mode 100644 include/net/lin.h
create mode 100644 include/uapi/linux/can/lin.h
create mode 100644 net/can/lin.c
