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linux/drivers/net/can/Kconfig
Dario Binacchi f00647d812 can: bxcan: add support for ST bxCAN controller 
Add support for the basic extended CAN controller (bxCAN) found in many
low- to middle-end STM32 SoCs. It supports the Basic Extended CAN
protocol versions 2.0A and B with a maximum bit rate of 1 Mbit/s.

The controller supports two channels (CAN1 as primary and CAN2 as
secondary) and the driver can enable either or both of the channels. They
share some of the required logic (e. g. clocks and filters), and that means
you cannot use the secondary CAN without enabling some hardware resources
managed by the primary CAN.

Each channel has 3 transmit mailboxes, 2 receive FIFOs with 3 stages and
28 scalable filter banks.
It also manages 4 dedicated interrupt vectors:
- transmit interrupt
- FIFO 0 receive interrupt
- FIFO 1 receive interrupt
- status change error interrupt

Driver uses all 3 available mailboxes for transmission and FIFO 0 for
reception. Rx filter rules are configured to the minimum. They accept
all messages and assign filter 0 to CAN1 and filter 14 to CAN2 in
identifier mask mode with 32 bits width. It enables and uses transmit,
receive buffers for FIFO 0 and error and status change interrupts.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20230328073328.3949796-6-dario.binacchi@amarulasolutions.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2023-03-28 11:43:36 +02:00

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# SPDX-License-Identifier: GPL-2.0-only
menuconfig CAN_DEV
tristate "CAN Device Drivers"
default y
depends on CAN
help
Controller Area Network (CAN) is serial communications protocol up to
1Mbit/s for its original release (now known as Classical CAN) and up
to 8Mbit/s for the more recent CAN with Flexible Data-Rate
(CAN-FD). The CAN bus was originally mainly for automotive, but is now
widely used in marine (NMEA2000), industrial, and medical
applications. More information on the CAN network protocol family
PF_CAN is contained in <Documentation/networking/can.rst>.
This section contains all the CAN(-FD) device drivers including the
virtual ones. If you own such devices or plan to use the virtual CAN
interfaces to develop applications, say Y here.
To compile as a module, choose M here: the module will be called
can-dev.
if CAN_DEV
config CAN_VCAN
tristate "Virtual Local CAN Interface (vcan)"
help
Similar to the network loopback devices, vcan offers a
virtual local CAN interface.
This driver can also be built as a module. If so, the module
will be called vcan.
config CAN_VXCAN
tristate "Virtual CAN Tunnel (vxcan)"
help
Similar to the virtual ethernet driver veth, vxcan implements a
local CAN traffic tunnel between two virtual CAN network devices.
When creating a vxcan, two vxcan devices are created as pair.
When one end receives the packet it appears on its pair and vice
versa. The vxcan can be used for cross namespace communication.
In opposite to vcan loopback devices the vxcan only forwards CAN
frames to its pair and does *not* provide a local echo of sent
CAN frames. To disable a potential echo in af_can.c the vxcan driver
announces IFF_ECHO in the interface flags. To have a clean start
in each namespace the CAN GW hop counter is set to zero.
This driver can also be built as a module. If so, the module
will be called vxcan.
config CAN_NETLINK
bool "CAN device drivers with Netlink support"
default y
help
Enables the common framework for CAN device drivers. This is the
standard library and provides features for the Netlink interface such
as bittiming validation, support of CAN error states, device restart
and others.
The additional features selected by this option will be added to the
can-dev module.
This is required by all platform and hardware CAN drivers. If you
plan to use such devices or if unsure, say Y.
if CAN_NETLINK
config CAN_CALC_BITTIMING
bool "CAN bit-timing calculation"
default y
help
If enabled, CAN bit-timing parameters will be calculated for the
bit-rate specified via Netlink argument "bitrate" when the device
get started. This works fine for the most common CAN controllers
with standard bit-rates but may fail for exotic bit-rates or CAN
source clock frequencies. Disabling saves some space, but then the
bit-timing parameters must be specified directly using the Netlink
arguments "tq", "prop_seg", "phase_seg1", "phase_seg2" and "sjw".
The additional features selected by this option will be added to the
can-dev module.
If unsure, say Y.
config CAN_RX_OFFLOAD
bool
config CAN_AT91
tristate "Atmel AT91 onchip CAN controller"
depends on (ARCH_AT91 || COMPILE_TEST) && HAS_IOMEM
help
This is a driver for the SoC CAN controller in Atmel's AT91SAM9263
and AT91SAM9X5 processors.
config CAN_BXCAN
tristate "STM32 Basic Extended CAN (bxCAN) devices"
depends on OF || ARCH_STM32 || COMPILE_TEST
depends on HAS_IOMEM
select CAN_RX_OFFLOAD
help
Say yes here to build support for the STMicroelectronics STM32 basic
extended CAN Controller (bxCAN).
This driver can also be built as a module. If so, the module
will be called bxcan.
config CAN_CAN327
tristate "Serial / USB serial ELM327 based OBD-II Interfaces (can327)"
depends on TTY
select CAN_RX_OFFLOAD
help
CAN driver for several 'low cost' OBD-II interfaces based on the
ELM327 OBD-II interpreter chip.
This is a best effort driver - the ELM327 interface was never
designed to be used as a standalone CAN interface. However, it can
still be used for simple request-response protocols (such as OBD II),
and to monitor broadcast messages on a bus (such as in a vehicle).
Please refer to the documentation for information on how to use it:
Documentation/networking/device_drivers/can/can327.rst
If this driver is built as a module, it will be called can327.
config CAN_FLEXCAN
tristate "Support for Freescale FLEXCAN based chips"
depends on OF || COLDFIRE || COMPILE_TEST
depends on HAS_IOMEM
select CAN_RX_OFFLOAD
help
Say Y here if you want to support for Freescale FlexCAN.
config CAN_GRCAN
tristate "Aeroflex Gaisler GRCAN and GRHCAN CAN devices"
depends on OF && HAS_DMA && HAS_IOMEM
help
Say Y here if you want to use Aeroflex Gaisler GRCAN or GRHCAN.
Note that the driver supports little endian, even though little
endian syntheses of the cores would need some modifications on
the hardware level to work.
config CAN_JANZ_ICAN3
tristate "Janz VMOD-ICAN3 Intelligent CAN controller"
depends on MFD_JANZ_CMODIO
help
Driver for Janz VMOD-ICAN3 Intelligent CAN controller module, which
connects to a MODULbus carrier board.
This driver can also be built as a module. If so, the module will be
called janz-ican3.ko.
config CAN_KVASER_PCIEFD
depends on PCI
tristate "Kvaser PCIe FD cards"
select CRC32
help
This is a driver for the Kvaser PCI Express CAN FD family.
Supported devices:
Kvaser PCIEcan 4xHS
Kvaser PCIEcan 2xHS v2
Kvaser PCIEcan HS v2
Kvaser Mini PCI Express HS v2
Kvaser Mini PCI Express 2xHS v2
config CAN_SLCAN
tristate "Serial / USB serial CAN Adaptors (slcan)"
depends on TTY
help
CAN driver for several 'low cost' CAN interfaces that are attached
via serial lines or via USB-to-serial adapters using the LAWICEL
ASCII protocol. The driver implements the tty linediscipline N_SLCAN.
As only the sending and receiving of CAN frames is implemented, this
driver should work with the (serial/USB) CAN hardware from:
www.canusb.com / www.can232.com / www.mictronics.de / www.canhack.de
Userspace tools to attach the SLCAN line discipline (slcan_attach,
slcand) can be found in the can-utils at the linux-can project, see
https://github.com/linux-can/can-utils for details.
The slcan driver supports up to 10 CAN netdevices by default which
can be changed by the 'maxdev=xx' module option. This driver can
also be built as a module. If so, the module will be called slcan.
config CAN_SUN4I
tristate "Allwinner A10 CAN controller"
depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST
help
Say Y here if you want to use CAN controller found on Allwinner
A10/A20 SoCs.
To compile this driver as a module, choose M here: the module will
be called sun4i_can.
config CAN_TI_HECC
depends on ARM
tristate "TI High End CAN Controller"
select CAN_RX_OFFLOAD
help
Driver for TI HECC (High End CAN Controller) module found on many
TI devices. The device specifications are available from www.ti.com
config CAN_XILINXCAN
tristate "Xilinx CAN"
depends on ARCH_ZYNQ || ARM64 || MICROBLAZE || COMPILE_TEST
depends on COMMON_CLK && HAS_IOMEM
help
Xilinx CAN driver. This driver supports both soft AXI CAN IP and
Zynq CANPS IP.
source "drivers/net/can/c_can/Kconfig"
source "drivers/net/can/cc770/Kconfig"
source "drivers/net/can/ctucanfd/Kconfig"
source "drivers/net/can/ifi_canfd/Kconfig"
source "drivers/net/can/m_can/Kconfig"
source "drivers/net/can/mscan/Kconfig"
source "drivers/net/can/peak_canfd/Kconfig"
source "drivers/net/can/rcar/Kconfig"
source "drivers/net/can/sja1000/Kconfig"
source "drivers/net/can/softing/Kconfig"
source "drivers/net/can/spi/Kconfig"
source "drivers/net/can/usb/Kconfig"
endif #CAN_NETLINK
config CAN_DEBUG_DEVICES
bool "CAN devices debugging messages"
help
Say Y here if you want the CAN device drivers to produce a bunch of
debug messages to the system log. Select this if you are having
a problem with CAN support and want to see more of what is going
on.
endif #CAN_DEV
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