dd3bd23eb4
This patch adds support for the CAN FD controller found in Renesas R-Car SoCs. The controller operates in CAN FD only mode by default. CAN FD mode supports both Classical CAN & CAN FD frame formats. The controller supports ISO 11898-1:2015 CAN FD format only. This controller supports two channels and the driver can enable either or both of the channels. Driver uses Rx FIFOs (one per channel) for reception & Common FIFOs (one per channel) for transmission. Rx filter rules are configured to the minimum (one per channel) and it accepts Standard, Extended, Data & Remote Frame combinations. Note: There are few documentation errors in R-Car Gen3 Hardware User Manual v0.5E with respect to CAN FD controller. They are listed below: 1. CAN FD interrupt numbers 29 & 30 are listed as per channel interrupts. However, they are common to both channels (i.e.) they are global and channel interrupts respectively. 2. CANFD clock is derived from PLL1. This is not documented. 3. CANFD clock is further divided by (1/2) within the CAN FD controller. This is not documented. 4. The minimum value of NTSEG1 in RSCFDnCFDCmNCFG register is 2 Tq. It is specified 4 Tq in the manual. 5. The maximum number of message RAM area the controller can use is 3584 bytes. It is specified 10752 bytes in the manual. Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com> Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
171 lines
5.7 KiB
Text
171 lines
5.7 KiB
Text
menu "CAN Device Drivers"
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config CAN_VCAN
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tristate "Virtual Local CAN Interface (vcan)"
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---help---
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Similar to the network loopback devices, vcan offers a
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virtual local CAN interface.
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This driver can also be built as a module. If so, the module
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will be called vcan.
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config CAN_SLCAN
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tristate "Serial / USB serial CAN Adaptors (slcan)"
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depends on TTY
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---help---
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CAN driver for several 'low cost' CAN interfaces that are attached
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via serial lines or via USB-to-serial adapters using the LAWICEL
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ASCII protocol. The driver implements the tty linediscipline N_SLCAN.
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As only the sending and receiving of CAN frames is implemented, this
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driver should work with the (serial/USB) CAN hardware from:
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www.canusb.com / www.can232.com / www.mictronics.de / www.canhack.de
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Userspace tools to attach the SLCAN line discipline (slcan_attach,
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slcand) can be found in the can-utils at the SocketCAN SVN, see
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http://developer.berlios.de/projects/socketcan for details.
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The slcan driver supports up to 10 CAN netdevices by default which
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can be changed by the 'maxdev=xx' module option. This driver can
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also be built as a module. If so, the module will be called slcan.
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config CAN_DEV
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tristate "Platform CAN drivers with Netlink support"
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default y
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---help---
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Enables the common framework for platform CAN drivers with Netlink
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support. This is the standard library for CAN drivers.
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If unsure, say Y.
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if CAN_DEV
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config CAN_CALC_BITTIMING
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bool "CAN bit-timing calculation"
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default y
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---help---
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If enabled, CAN bit-timing parameters will be calculated for the
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bit-rate specified via Netlink argument "bitrate" when the device
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get started. This works fine for the most common CAN controllers
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with standard bit-rates but may fail for exotic bit-rates or CAN
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source clock frequencies. Disabling saves some space, but then the
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bit-timing parameters must be specified directly using the Netlink
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arguments "tq", "prop_seg", "phase_seg1", "phase_seg2" and "sjw".
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If unsure, say Y.
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config CAN_LEDS
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bool "Enable LED triggers for Netlink based drivers"
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depends on LEDS_CLASS
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select LEDS_TRIGGERS
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---help---
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This option adds two LED triggers for packet receive and transmit
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events on each supported CAN device.
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Say Y here if you are working on a system with led-class supported
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LEDs and you want to use them as canbus activity indicators.
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config CAN_AT91
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tristate "Atmel AT91 onchip CAN controller"
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depends on (ARCH_AT91 || COMPILE_TEST) && HAS_IOMEM
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---help---
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This is a driver for the SoC CAN controller in Atmel's AT91SAM9263
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and AT91SAM9X5 processors.
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config CAN_BFIN
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depends on BF534 || BF536 || BF537 || BF538 || BF539 || BF54x
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tristate "Analog Devices Blackfin on-chip CAN"
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---help---
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Driver for the Analog Devices Blackfin on-chip CAN controllers
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To compile this driver as a module, choose M here: the
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module will be called bfin_can.
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config CAN_FLEXCAN
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tristate "Support for Freescale FLEXCAN based chips"
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depends on ARM || PPC
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---help---
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Say Y here if you want to support for Freescale FlexCAN.
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config CAN_GRCAN
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tristate "Aeroflex Gaisler GRCAN and GRHCAN CAN devices"
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depends on OF && HAS_DMA
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---help---
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Say Y here if you want to use Aeroflex Gaisler GRCAN or GRHCAN.
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Note that the driver supports little endian, even though little
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endian syntheses of the cores would need some modifications on
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the hardware level to work.
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config CAN_JANZ_ICAN3
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tristate "Janz VMOD-ICAN3 Intelligent CAN controller"
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depends on MFD_JANZ_CMODIO
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---help---
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Driver for Janz VMOD-ICAN3 Intelligent CAN controller module, which
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connects to a MODULbus carrier board.
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This driver can also be built as a module. If so, the module will be
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called janz-ican3.ko.
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config CAN_RCAR
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tristate "Renesas R-Car CAN controller"
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depends on ARCH_RENESAS || ARM
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---help---
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Say Y here if you want to use CAN controller found on Renesas R-Car
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SoCs.
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To compile this driver as a module, choose M here: the module will
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be called rcar_can.
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config CAN_SUN4I
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tristate "Allwinner A10 CAN controller"
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depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST
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---help---
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Say Y here if you want to use CAN controller found on Allwinner
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A10/A20 SoCs.
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To compile this driver as a module, choose M here: the module will
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be called sun4i_can.
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config CAN_TI_HECC
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depends on ARM
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tristate "TI High End CAN Controller"
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---help---
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Driver for TI HECC (High End CAN Controller) module found on many
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TI devices. The device specifications are available from www.ti.com
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config CAN_XILINXCAN
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tristate "Xilinx CAN"
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depends on ARCH_ZYNQ || ARM64 || MICROBLAZE || COMPILE_TEST
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depends on COMMON_CLK && HAS_IOMEM
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---help---
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Xilinx CAN driver. This driver supports both soft AXI CAN IP and
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Zynq CANPS IP.
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config PCH_CAN
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tristate "Intel EG20T PCH CAN controller"
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depends on PCI && (X86_32 || COMPILE_TEST)
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---help---
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This driver is for PCH CAN of Topcliff (Intel EG20T PCH) which
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is an IOH for x86 embedded processor (Intel Atom E6xx series).
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This driver can access CAN bus.
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source "drivers/net/can/c_can/Kconfig"
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source "drivers/net/can/cc770/Kconfig"
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source "drivers/net/can/ifi_canfd/Kconfig"
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source "drivers/net/can/m_can/Kconfig"
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source "drivers/net/can/mscan/Kconfig"
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source "drivers/net/can/rcar/Kconfig"
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source "drivers/net/can/sja1000/Kconfig"
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source "drivers/net/can/softing/Kconfig"
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source "drivers/net/can/spi/Kconfig"
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source "drivers/net/can/usb/Kconfig"
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endif
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config CAN_DEBUG_DEVICES
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bool "CAN devices debugging messages"
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---help---
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Say Y here if you want the CAN device drivers to produce a bunch of
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debug messages to the system log. Select this if you are having
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a problem with CAN support and want to see more of what is going
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on.
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endmenu
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