From f00647d8127be4d3f37f7e07dace24c04689ec63 Mon Sep 17 00:00:00 2001 From: Dario Binacchi Date: Tue, 28 Mar 2023 09:33:28 +0200 Subject: 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 Reviewed-by: Vincent Mailhol Link: https://lore.kernel.org/all/20230328073328.3949796-6-dario.binacchi@amarulasolutions.com Signed-off-by: Marc Kleine-Budde --- drivers/net/can/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/net/can/Kconfig') diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig index cd34e8dc9394..3ceccafd701b 100644 --- a/drivers/net/can/Kconfig +++ b/drivers/net/can/Kconfig @@ -93,6 +93,18 @@ config CAN_AT91 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 -- cgit v1.2.3