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zephyr/drivers/can/can_stm32_fdcan.c

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/*
* Copyright (c) 2022 Vestas Wind Systems A/S
* Copyright (c) 2020 Alexander Wachter
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/drivers/can.h>
#include <zephyr/drivers/can/can_mcan.h>
#include <zephyr/drivers/clock_control/stm32_clock_control.h>
#include <zephyr/drivers/clock_control.h>
#include <zephyr/drivers/pinctrl.h>
#include <zephyr/kernel.h>
#include <zephyr/sys/__assert.h>
#include <soc.h>
#include <stm32_ll_rcc.h>
#include <zephyr/logging/log.h>
#include <zephyr/irq.h>
LOG_MODULE_REGISTER(can_stm32fd, CONFIG_CAN_LOG_LEVEL);
#define DT_DRV_COMPAT st_stm32_fdcan
/*
* The STMicroelectronics STM32 FDCAN definitions correspond to those found in the
* STMicroelectronics STM32G4 Series Reference manual (RM0440), Rev 7.
*
* This controller uses a Bosch M_CAN like register layout, but some registers are unimplemented,
* some registers are mapped to other register offsets, and some registers have had their bit fields
* remapped.
*
* Apart from the definitions below please note the following limitations:
* - TEST register SVAL, TXBNS, PVAL, and TXBNP bits are not available.
* - CCCR register VMM and UTSU bits are not available.
* - TXBC register TFQS, NDTB, and TBSA fields are not available.
*/
/* Interrupt register */
#define CAN_STM32FD_IR_ARA BIT(23)
#define CAN_STM32FD_IR_PED BIT(22)
#define CAN_STM32FD_IR_PEA BIT(21)
#define CAN_STM32FD_IR_WDI BIT(20)
#define CAN_STM32FD_IR_BO BIT(19)
#define CAN_STM32FD_IR_EW BIT(18)
#define CAN_STM32FD_IR_EP BIT(17)
#define CAN_STM32FD_IR_ELO BIT(16)
#define CAN_STM32FD_IR_TOO BIT(15)
#define CAN_STM32FD_IR_MRAF BIT(14)
#define CAN_STM32FD_IR_TSW BIT(13)
#define CAN_STM32FD_IR_TEFL BIT(12)
#define CAN_STM32FD_IR_TEFF BIT(11)
#define CAN_STM32FD_IR_TEFN BIT(10)
#define CAN_STM32FD_IR_TFE BIT(9)
#define CAN_STM32FD_IR_TCF BIT(8)
#define CAN_STM32FD_IR_TC BIT(7)
#define CAN_STM32FD_IR_HPM BIT(6)
#define CAN_STM32FD_IR_RF1L BIT(5)
#define CAN_STM32FD_IR_RF1F BIT(4)
#define CAN_STM32FD_IR_RF1N BIT(3)
#define CAN_STM32FD_IR_RF0L BIT(2)
#define CAN_STM32FD_IR_RF0F BIT(1)
#define CAN_STM32FD_IR_RF0N BIT(0)
/* Interrupt Enable register */
#define CAN_STM32FD_IE_ARAE BIT(23)
#define CAN_STM32FD_IE_PEDE BIT(22)
#define CAN_STM32FD_IE_PEAE BIT(21)
#define CAN_STM32FD_IE_WDIE BIT(20)
#define CAN_STM32FD_IE_BOE BIT(19)
#define CAN_STM32FD_IE_EWE BIT(18)
#define CAN_STM32FD_IE_EPE BIT(17)
#define CAN_STM32FD_IE_ELOE BIT(16)
#define CAN_STM32FD_IE_TOOE BIT(15)
#define CAN_STM32FD_IE_MRAFE BIT(14)
#define CAN_STM32FD_IE_TSWE BIT(13)
#define CAN_STM32FD_IE_TEFLE BIT(12)
#define CAN_STM32FD_IE_TEFFE BIT(11)
#define CAN_STM32FD_IE_TEFNE BIT(10)
#define CAN_STM32FD_IE_TFEE BIT(9)
#define CAN_STM32FD_IE_TCFE BIT(8)
#define CAN_STM32FD_IE_TCE BIT(7)
#define CAN_STM32FD_IE_HPME BIT(6)
#define CAN_STM32FD_IE_RF1LE BIT(5)
#define CAN_STM32FD_IE_RF1FE BIT(4)
#define CAN_STM32FD_IE_RF1NE BIT(3)
#define CAN_STM32FD_IE_RF0LE BIT(2)
#define CAN_STM32FD_IE_RF0FE BIT(1)
#define CAN_STM32FD_IE_RF0NE BIT(0)
/* Interrupt Line Select register */
#define CAN_STM32FD_ILS_PERR BIT(6)
#define CAN_STM32FD_ILS_BERR BIT(5)
#define CAN_STM32FD_ILS_MISC BIT(4)
#define CAN_STM32FD_ILS_TFERR BIT(3)
#define CAN_STM32FD_ILS_SMSG BIT(2)
#define CAN_STM32FD_ILS_RXFIFO1 BIT(1)
#define CAN_STM32FD_ILS_RXFIFO0 BIT(0)
/* Global filter configuration register */
#define CAN_STM32FD_RXGFC 0x080
#define CAN_STM32FD_RXGFC_LSE GENMASK(27, 24)
#define CAN_STM32FD_RXGFC_LSS GENMASK(20, 16)
#define CAN_STM32FD_RXGFC_F0OM BIT(9)
#define CAN_STM32FD_RXGFC_F1OM BIT(8)
#define CAN_STM32FD_RXGFC_ANFS GENMASK(5, 4)
#define CAN_STM32FD_RXGFC_ANFE GENMASK(3, 2)
#define CAN_STM32FD_RXGFC_RRFS BIT(1)
#define CAN_STM32FD_RXGFC_RRFE BIT(0)
/* Extended ID AND Mask register */
#define CAN_STM32FD_XIDAM 0x084
/* High Priority Message Status register */
#define CAN_STM32FD_HPMS 0x088
/* Rx FIFO 0 Status register */
#define CAN_STM32FD_RXF0S 0x090
/* Rx FIFO 0 Acknowledge register */
#define CAN_STM32FD_RXF0A 0x094
/* Rx FIFO 1 Status register */
#define CAN_STM32FD_RXF1S 0x098
/* Rx FIFO 1 Acknowledge register */
#define CAN_STM32FD_RXF1A 0x09C
/* Tx Buffer Configuration register */
#define CAN_STM32FD_TXBC_TFQM BIT(24)
/* Tx Buffer Request Pending register */
#define CAN_STM32FD_TXBRP 0x0C8
/* Tx Buffer Add Request register */
#define CAN_STM32FD_TXBAR 0x0CC
/* Tx Buffer Cancellation Request register */
#define CAN_STM32FD_TXBCR 0x0D0
/* Tx Buffer Transmission Occurred register */
#define CAN_STM32FD_TXBTO 0x0D4
/* Tx Buffer Cancellation Finished register */
#define CAN_STM32FD_TXBCF 0x0D8
/* Tx Buffer Transmission Interrupt Enable register */
#define CAN_STM32FD_TXBTIE 0x0DC
/* Tx Buffer Cancellation Finished Interrupt Enable register */
#define CAN_STM32FD_TXBCIE 0x0E0
/* Tx Event FIFO Status register */
#define CAN_STM32FD_TXEFS 0x0E4
/* Tx Event FIFO Acknowledge register */
#define CAN_STM32FD_TXEFA 0x0E8
/* Register address indicating unsupported register */
#define CAN_STM32FD_REGISTER_UNSUPPORTED UINT16_MAX
/* This symbol takes the value 1 if one of the device instances */
/* is configured in dts with a domain clock */
#if STM32_DT_INST_DEV_DOMAIN_CLOCK_SUPPORT
#define STM32_CANFD_DOMAIN_CLOCK_SUPPORT 1
#else
#define STM32_CANFD_DOMAIN_CLOCK_SUPPORT 0
#endif
struct can_stm32fd_config {
mm_reg_t base;
mem_addr_t mram;
size_t pclk_len;
const struct stm32_pclken *pclken;
void (*config_irq)(void);
const struct pinctrl_dev_config *pcfg;
uint8_t clock_divider;
};
static inline uint16_t can_stm32fd_remap_reg(uint16_t reg)
{
uint16_t remap;
switch (reg) {
case CAN_MCAN_SIDFC:
__fallthrough;
case CAN_MCAN_XIDFC:
__fallthrough;
case CAN_MCAN_NDAT1:
__fallthrough;
case CAN_MCAN_NDAT2:
__fallthrough;
case CAN_MCAN_RXF0C:
__fallthrough;
case CAN_MCAN_RXBC:
__fallthrough;
case CAN_MCAN_RXF1C:
__fallthrough;
case CAN_MCAN_RXESC:
__fallthrough;
case CAN_MCAN_TXESC:
__fallthrough;
case CAN_MCAN_TXEFC:
__ASSERT_NO_MSG(false);
remap = CAN_STM32FD_REGISTER_UNSUPPORTED;
case CAN_MCAN_XIDAM:
remap = CAN_STM32FD_XIDAM;
break;
case CAN_MCAN_RXF0S:
remap = CAN_STM32FD_RXF0S;
break;
case CAN_MCAN_RXF0A:
remap = CAN_STM32FD_RXF0A;
break;
case CAN_MCAN_RXF1S:
remap = CAN_STM32FD_RXF1S;
break;
case CAN_MCAN_RXF1A:
remap = CAN_STM32FD_RXF1A;
break;
case CAN_MCAN_TXBRP:
remap = CAN_STM32FD_TXBRP;
break;
case CAN_MCAN_TXBAR:
remap = CAN_STM32FD_TXBAR;
break;
case CAN_MCAN_TXBCR:
remap = CAN_STM32FD_TXBCR;
break;
case CAN_MCAN_TXBTO:
remap = CAN_STM32FD_TXBTO;
break;
case CAN_MCAN_TXBCF:
remap = CAN_STM32FD_TXBCF;
break;
case CAN_MCAN_TXBTIE:
remap = CAN_STM32FD_TXBTIE;
break;
case CAN_MCAN_TXBCIE:
remap = CAN_STM32FD_TXBCIE;
break;
case CAN_MCAN_TXEFS:
remap = CAN_STM32FD_TXEFS;
break;
case CAN_MCAN_TXEFA:
remap = CAN_STM32FD_TXEFA;
break;
default:
/* No register address remap needed */
remap = reg;
break;
};
return remap;
}
static int can_stm32fd_read_reg(const struct device *dev, uint16_t reg, uint32_t *val)
{
const struct can_mcan_config *mcan_config = dev->config;
const struct can_stm32fd_config *stm32fd_config = mcan_config->custom;
uint16_t remap;
uint32_t bits;
int err;
remap = can_stm32fd_remap_reg(reg);
if (remap == CAN_STM32FD_REGISTER_UNSUPPORTED) {
return -ENOTSUP;
}
err = can_mcan_sys_read_reg(stm32fd_config->base, remap, &bits);
if (err != 0) {
return err;
}
*val = 0U;
switch (reg) {
case CAN_MCAN_IR:
/* Remap IR bits */
*val |= FIELD_PREP(CAN_MCAN_IR_ARA, FIELD_GET(CAN_STM32FD_IR_ARA, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_PED, FIELD_GET(CAN_STM32FD_IR_PED, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_PEA, FIELD_GET(CAN_STM32FD_IR_PEA, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_WDI, FIELD_GET(CAN_STM32FD_IR_WDI, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_BO, FIELD_GET(CAN_STM32FD_IR_BO, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_EW, FIELD_GET(CAN_STM32FD_IR_EW, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_EP, FIELD_GET(CAN_STM32FD_IR_EP, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_ELO, FIELD_GET(CAN_STM32FD_IR_ELO, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_TOO, FIELD_GET(CAN_STM32FD_IR_TOO, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_MRAF, FIELD_GET(CAN_STM32FD_IR_MRAF, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_TSW, FIELD_GET(CAN_STM32FD_IR_TSW, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_TEFL, FIELD_GET(CAN_STM32FD_IR_TEFL, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_TEFF, FIELD_GET(CAN_STM32FD_IR_TEFF, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_TEFN, FIELD_GET(CAN_STM32FD_IR_TEFN, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_TFE, FIELD_GET(CAN_STM32FD_IR_TFE, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_TCF, FIELD_GET(CAN_STM32FD_IR_TCF, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_TC, FIELD_GET(CAN_STM32FD_IR_TC, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_HPM, FIELD_GET(CAN_STM32FD_IR_HPM, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_RF1L, FIELD_GET(CAN_STM32FD_IR_RF1L, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_RF1F, FIELD_GET(CAN_STM32FD_IR_RF1F, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_RF1N, FIELD_GET(CAN_STM32FD_IR_RF1N, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_RF0L, FIELD_GET(CAN_STM32FD_IR_RF0L, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_RF0F, FIELD_GET(CAN_STM32FD_IR_RF0F, bits));
*val |= FIELD_PREP(CAN_MCAN_IR_RF0N, FIELD_GET(CAN_STM32FD_IR_RF0N, bits));
break;
case CAN_MCAN_IE:
/* Remap IE bits */
*val |= FIELD_PREP(CAN_MCAN_IE_ARAE, FIELD_GET(CAN_STM32FD_IE_ARAE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_PEDE, FIELD_GET(CAN_STM32FD_IE_PEDE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_PEAE, FIELD_GET(CAN_STM32FD_IE_PEAE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_WDIE, FIELD_GET(CAN_STM32FD_IE_WDIE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_BOE, FIELD_GET(CAN_STM32FD_IE_BOE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_EWE, FIELD_GET(CAN_STM32FD_IE_EWE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_EPE, FIELD_GET(CAN_STM32FD_IE_EPE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_ELOE, FIELD_GET(CAN_STM32FD_IE_ELOE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_TOOE, FIELD_GET(CAN_STM32FD_IE_TOOE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_MRAFE, FIELD_GET(CAN_STM32FD_IE_MRAFE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_TSWE, FIELD_GET(CAN_STM32FD_IE_TSWE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_TEFLE, FIELD_GET(CAN_STM32FD_IE_TEFLE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_TEFFE, FIELD_GET(CAN_STM32FD_IE_TEFFE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_TEFNE, FIELD_GET(CAN_STM32FD_IE_TEFNE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_TFEE, FIELD_GET(CAN_STM32FD_IE_TFEE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_TCFE, FIELD_GET(CAN_STM32FD_IE_TCFE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_TCE, FIELD_GET(CAN_STM32FD_IE_TCE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_HPME, FIELD_GET(CAN_STM32FD_IE_HPME, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_RF1LE, FIELD_GET(CAN_STM32FD_IE_RF1LE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_RF1FE, FIELD_GET(CAN_STM32FD_IE_RF1FE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_RF1NE, FIELD_GET(CAN_STM32FD_IE_RF1NE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_RF0LE, FIELD_GET(CAN_STM32FD_IE_RF0LE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_RF0FE, FIELD_GET(CAN_STM32FD_IE_RF0FE, bits));
*val |= FIELD_PREP(CAN_MCAN_IE_RF0NE, FIELD_GET(CAN_STM32FD_IE_RF0NE, bits));
break;
case CAN_MCAN_ILS:
/* Only remap ILS groups used in can_mcan.c */
if ((bits & CAN_STM32FD_ILS_RXFIFO1) != 0U) {
*val |= CAN_MCAN_ILS_RF1LL | CAN_MCAN_ILS_RF1FL | CAN_MCAN_ILS_RF1NL;
}
if ((bits & CAN_STM32FD_ILS_RXFIFO0) != 0U) {
*val |= CAN_MCAN_ILS_RF0LL | CAN_MCAN_ILS_RF0FL | CAN_MCAN_ILS_RF0NL;
}
break;
case CAN_MCAN_GFC:
/* Map fields from RXGFC excluding STM32 FDCAN LSS and LSE fields */
*val = bits & (CAN_MCAN_GFC_ANFS | CAN_MCAN_GFC_ANFE |
CAN_MCAN_GFC_RRFS | CAN_MCAN_GFC_RRFE);
break;
default:
/* No field remap needed */
*val = bits;
break;
};
return 0;
}
static int can_stm32fd_write_reg(const struct device *dev, uint16_t reg, uint32_t val)
{
const struct can_mcan_config *mcan_config = dev->config;
const struct can_stm32fd_config *stm32fd_config = mcan_config->custom;
uint32_t bits = 0U;
uint16_t remap;
remap = can_stm32fd_remap_reg(reg);
if (remap == CAN_STM32FD_REGISTER_UNSUPPORTED) {
return -ENOTSUP;
}
switch (reg) {
case CAN_MCAN_IR:
/* Remap IR bits, ignoring unsupported bits */
bits |= FIELD_PREP(CAN_STM32FD_IR_ARA, FIELD_GET(CAN_MCAN_IR_ARA, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_PED, FIELD_GET(CAN_MCAN_IR_PED, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_PEA, FIELD_GET(CAN_MCAN_IR_PEA, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_WDI, FIELD_GET(CAN_MCAN_IR_WDI, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_BO, FIELD_GET(CAN_MCAN_IR_BO, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_EW, FIELD_GET(CAN_MCAN_IR_EW, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_EP, FIELD_GET(CAN_MCAN_IR_EP, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_ELO, FIELD_GET(CAN_MCAN_IR_ELO, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_TOO, FIELD_GET(CAN_MCAN_IR_TOO, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_MRAF, FIELD_GET(CAN_MCAN_IR_MRAF, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_TSW, FIELD_GET(CAN_MCAN_IR_TSW, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_TEFL, FIELD_GET(CAN_MCAN_IR_TEFL, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_TEFF, FIELD_GET(CAN_MCAN_IR_TEFF, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_TEFN, FIELD_GET(CAN_MCAN_IR_TEFN, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_TFE, FIELD_GET(CAN_MCAN_IR_TFE, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_TCF, FIELD_GET(CAN_MCAN_IR_TCF, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_TC, FIELD_GET(CAN_MCAN_IR_TC, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_HPM, FIELD_GET(CAN_MCAN_IR_HPM, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_RF1L, FIELD_GET(CAN_MCAN_IR_RF1L, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_RF1F, FIELD_GET(CAN_MCAN_IR_RF1F, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_RF1N, FIELD_GET(CAN_MCAN_IR_RF1N, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_RF0L, FIELD_GET(CAN_MCAN_IR_RF0L, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_RF0F, FIELD_GET(CAN_MCAN_IR_RF0F, val));
bits |= FIELD_PREP(CAN_STM32FD_IR_RF0N, FIELD_GET(CAN_MCAN_IR_RF0N, val));
break;
case CAN_MCAN_IE:
/* Remap IE bits, ignoring unsupported bits */
bits |= FIELD_PREP(CAN_STM32FD_IE_ARAE, FIELD_GET(CAN_MCAN_IE_ARAE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_PEDE, FIELD_GET(CAN_MCAN_IE_PEDE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_PEAE, FIELD_GET(CAN_MCAN_IE_PEAE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_WDIE, FIELD_GET(CAN_MCAN_IE_WDIE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_BOE, FIELD_GET(CAN_MCAN_IE_BOE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_EWE, FIELD_GET(CAN_MCAN_IE_EWE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_EPE, FIELD_GET(CAN_MCAN_IE_EPE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_ELOE, FIELD_GET(CAN_MCAN_IE_ELOE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_TOOE, FIELD_GET(CAN_MCAN_IE_TOOE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_MRAFE, FIELD_GET(CAN_MCAN_IE_MRAFE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_TSWE, FIELD_GET(CAN_MCAN_IE_TSWE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_TEFLE, FIELD_GET(CAN_MCAN_IE_TEFLE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_TEFFE, FIELD_GET(CAN_MCAN_IE_TEFFE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_TEFNE, FIELD_GET(CAN_MCAN_IE_TEFNE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_TFEE, FIELD_GET(CAN_MCAN_IE_TFEE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_TCFE, FIELD_GET(CAN_MCAN_IE_TCFE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_TCE, FIELD_GET(CAN_MCAN_IE_TCE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_HPME, FIELD_GET(CAN_MCAN_IE_HPME, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_RF1LE, FIELD_GET(CAN_MCAN_IE_RF1LE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_RF1FE, FIELD_GET(CAN_MCAN_IE_RF1FE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_RF1NE, FIELD_GET(CAN_MCAN_IE_RF1NE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_RF0LE, FIELD_GET(CAN_MCAN_IE_RF0LE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_RF0FE, FIELD_GET(CAN_MCAN_IE_RF0FE, val));
bits |= FIELD_PREP(CAN_STM32FD_IE_RF0NE, FIELD_GET(CAN_MCAN_IE_RF0NE, val));
break;
case CAN_MCAN_ILS:
/* Only remap ILS groups used in can_mcan.c */
if ((val & (CAN_MCAN_ILS_RF1LL | CAN_MCAN_ILS_RF1FL | CAN_MCAN_ILS_RF1NL)) != 0U) {
bits |= CAN_STM32FD_ILS_RXFIFO1;
}
if ((val & (CAN_MCAN_ILS_RF0LL | CAN_MCAN_ILS_RF0FL | CAN_MCAN_ILS_RF0NL)) != 0U) {
bits |= CAN_STM32FD_ILS_RXFIFO0;
}
break;
case CAN_MCAN_GFC:
/* Map fields to RXGFC including STM32 FDCAN LSS and LSE fields */
bits |= FIELD_PREP(CAN_STM32FD_RXGFC_LSS, CONFIG_CAN_MAX_STD_ID_FILTER) |
FIELD_PREP(CAN_STM32FD_RXGFC_LSE, CONFIG_CAN_MAX_EXT_ID_FILTER);
bits |= val & (CAN_MCAN_GFC_ANFS | CAN_MCAN_GFC_ANFE |
CAN_MCAN_GFC_RRFS | CAN_MCAN_GFC_RRFE);
break;
default:
/* No field remap needed */
bits = val;
break;
};
return can_mcan_sys_write_reg(stm32fd_config->base, remap, bits);
}
static int can_stm32fd_read_mram(const struct device *dev, uint16_t offset, void *dst, size_t len)
{
const struct can_mcan_config *mcan_config = dev->config;
const struct can_stm32fd_config *stm32fd_config = mcan_config->custom;
return can_mcan_sys_read_mram(stm32fd_config->mram, offset, dst, len);
}
static int can_stm32fd_write_mram(const struct device *dev, uint16_t offset, const void *src,
size_t len)
{
const struct can_mcan_config *mcan_config = dev->config;
const struct can_stm32fd_config *stm32fd_config = mcan_config->custom;
return can_mcan_sys_write_mram(stm32fd_config->mram, offset, src, len);
}
static int can_stm32fd_clear_mram(const struct device *dev, uint16_t offset, size_t len)
{
const struct can_mcan_config *mcan_config = dev->config;
const struct can_stm32fd_config *stm32fd_config = mcan_config->custom;
return can_mcan_sys_clear_mram(stm32fd_config->mram, offset, len);
}
static int can_stm32fd_get_core_clock(const struct device *dev, uint32_t *rate)
{
const uint32_t rate_tmp = LL_RCC_GetFDCANClockFreq(LL_RCC_FDCAN_CLKSOURCE);
ARG_UNUSED(dev);
if (rate_tmp == LL_RCC_PERIPH_FREQUENCY_NO) {
LOG_ERR("Can't read core clock");
return -EIO;
}
if (FDCAN_CONFIG->CKDIV == 0) {
*rate = rate_tmp;
} else {
*rate = rate_tmp / (FDCAN_CONFIG->CKDIV << 1);
}
return 0;
}
static int can_stm32fd_clock_enable(const struct device *dev)
{
int ret;
const struct can_mcan_config *mcan_cfg = dev->config;
const struct can_stm32fd_config *stm32fd_cfg = mcan_cfg->custom;
const struct device *const clk = DEVICE_DT_GET(STM32_CLOCK_CONTROL_NODE);
if (!device_is_ready(clk)) {
return -ENODEV;
}
if (IS_ENABLED(STM32_CANFD_DOMAIN_CLOCK_SUPPORT) && (stm32fd_cfg->pclk_len > 1)) {
ret = clock_control_configure(clk,
(clock_control_subsys_t)&stm32fd_cfg->pclken[1],
NULL);
if (ret < 0) {
LOG_ERR("Could not select can_stm32fd domain clock");
return ret;
}
}
ret = clock_control_on(clk, (clock_control_subsys_t)&stm32fd_cfg->pclken[0]);
if (ret < 0) {
return ret;
}
if (stm32fd_cfg->clock_divider != 0) {
can_mcan_enable_configuration_change(dev);
FDCAN_CONFIG->CKDIV = stm32fd_cfg->clock_divider >> 1;
}
return 0;
}
static int can_stm32fd_init(const struct device *dev)
{
const struct can_mcan_config *mcan_cfg = dev->config;
const struct can_stm32fd_config *stm32fd_cfg = mcan_cfg->custom;
uint32_t rxgfc;
int ret;
/* Configure dt provided device signals when available */
ret = pinctrl_apply_state(stm32fd_cfg->pcfg, PINCTRL_STATE_DEFAULT);
if (ret < 0) {
LOG_ERR("CAN pinctrl setup failed (%d)", ret);
return ret;
}
ret = can_stm32fd_clock_enable(dev);
if (ret < 0) {
LOG_ERR("Could not turn on CAN clock (%d)", ret);
return ret;
}
can_mcan_enable_configuration_change(dev);
/* Setup STM32 FDCAN Global Filter Configuration register */
ret = can_mcan_read_reg(dev, CAN_STM32FD_RXGFC, &rxgfc);
if (ret != 0) {
return ret;
}
rxgfc |= FIELD_PREP(CAN_STM32FD_RXGFC_LSS, CONFIG_CAN_MAX_STD_ID_FILTER) |
FIELD_PREP(CAN_STM32FD_RXGFC_LSE, CONFIG_CAN_MAX_EXT_ID_FILTER);
ret = can_mcan_write_reg(dev, CAN_STM32FD_RXGFC, rxgfc);
if (ret != 0) {
return ret;
}
/* Setup STM32 FDCAN Tx buffer configuration register */
ret = can_mcan_write_reg(dev, CAN_MCAN_TXBC, CAN_STM32FD_TXBC_TFQM);
if (ret != 0) {
return ret;
}
ret = can_mcan_init(dev);
if (ret != 0) {
return ret;
}
stm32fd_cfg->config_irq();
return ret;
}
static const struct can_driver_api can_stm32fd_driver_api = {
.get_capabilities = can_mcan_get_capabilities,
.start = can_mcan_start,
.stop = can_mcan_stop,
.set_mode = can_mcan_set_mode,
.set_timing = can_mcan_set_timing,
.send = can_mcan_send,
.add_rx_filter = can_mcan_add_rx_filter,
.remove_rx_filter = can_mcan_remove_rx_filter,
.get_state = can_mcan_get_state,
#ifndef CONFIG_CAN_AUTO_BUS_OFF_RECOVERY
.recover = can_mcan_recover,
#endif /* CONFIG_CAN_AUTO_BUS_OFF_RECOVERY */
.get_core_clock = can_stm32fd_get_core_clock,
.get_max_bitrate = can_mcan_get_max_bitrate,
.get_max_filters = can_mcan_get_max_filters,
.set_state_change_callback = can_mcan_set_state_change_callback,
.timing_min = CAN_MCAN_TIMING_MIN_INITIALIZER,
.timing_max = CAN_MCAN_TIMING_MAX_INITIALIZER,
#ifdef CONFIG_CAN_FD_MODE
.set_timing_data = can_mcan_set_timing_data,
.timing_data_min = CAN_MCAN_TIMING_DATA_MIN_INITIALIZER,
.timing_data_max = CAN_MCAN_TIMING_DATA_MAX_INITIALIZER,
#endif /* CONFIG_CAN_FD_MODE */
};
static const struct can_mcan_ops can_stm32fd_ops = {
.read_reg = can_stm32fd_read_reg,
.write_reg = can_stm32fd_write_reg,
.read_mram = can_stm32fd_read_mram,
.write_mram = can_stm32fd_write_mram,
.clear_mram = can_stm32fd_clear_mram,
};
#define CAN_STM32FD_BUILD_ASSERT_MRAM_CFG(inst) \
BUILD_ASSERT(CAN_MCAN_DT_INST_MRAM_STD_FILTER_ELEMENTS(inst) == 28, \
"Standard filter elements must be 28"); \
BUILD_ASSERT(CAN_MCAN_DT_INST_MRAM_EXT_FILTER_ELEMENTS(inst) == 8, \
"Extended filter elements must be 8"); \
BUILD_ASSERT(CAN_MCAN_DT_INST_MRAM_RX_FIFO0_ELEMENTS(inst) == 3, \
"Rx FIFO 0 elements must be 3"); \
BUILD_ASSERT(CAN_MCAN_DT_INST_MRAM_RX_FIFO1_ELEMENTS(inst) == 3, \
"Rx FIFO 1 elements must be 3"); \
BUILD_ASSERT(CAN_MCAN_DT_INST_MRAM_RX_BUFFER_ELEMENTS(inst) == 0, \
"Rx Buffer elements must be 0"); \
BUILD_ASSERT(CAN_MCAN_DT_INST_MRAM_TX_EVENT_FIFO_ELEMENTS(inst) == 3, \
"Tx Event FIFO elements must be 3"); \
BUILD_ASSERT(CAN_MCAN_DT_INST_MRAM_TX_BUFFER_ELEMENTS(inst) == 3, \
"Tx Buffer elements must be 0");
#define CAN_STM32FD_IRQ_CFG_FUNCTION(inst) \
static void config_can_##inst##_irq(void) \
{ \
LOG_DBG("Enable CAN" #inst " IRQ"); \
IRQ_CONNECT(DT_INST_IRQ_BY_NAME(inst, line_0, irq), \
DT_INST_IRQ_BY_NAME(inst, line_0, priority), \
can_mcan_line_0_isr, DEVICE_DT_INST_GET(inst), 0); \
irq_enable(DT_INST_IRQ_BY_NAME(inst, line_0, irq)); \
IRQ_CONNECT(DT_INST_IRQ_BY_NAME(inst, line_1, irq), \
DT_INST_IRQ_BY_NAME(inst, line_1, priority), \
can_mcan_line_1_isr, DEVICE_DT_INST_GET(inst), 0); \
irq_enable(DT_INST_IRQ_BY_NAME(inst, line_1, irq)); \
}
#define CAN_STM32FD_CFG_INST(inst) \
BUILD_ASSERT(CAN_MCAN_DT_INST_MRAM_ELEMENTS_SIZE(inst) <= \
CAN_MCAN_DT_INST_MRAM_SIZE(inst), \
"Insufficient Message RAM size to hold elements"); \
\
PINCTRL_DT_INST_DEFINE(inst); \
CAN_MCAN_CALLBACKS_DEFINE(can_stm32fd_cbs_##inst, \
CAN_MCAN_DT_INST_MRAM_TX_BUFFER_ELEMENTS(inst), \
CONFIG_CAN_MAX_STD_ID_FILTER, \
CONFIG_CAN_MAX_EXT_ID_FILTER); \
\
static const struct stm32_pclken can_stm32fd_pclken_##inst[] = \
STM32_DT_INST_CLOCKS(inst); \
\
static const struct can_stm32fd_config can_stm32fd_cfg_##inst = { \
.base = CAN_MCAN_DT_INST_MCAN_ADDR(inst), \
.mram = CAN_MCAN_DT_INST_MRAM_ADDR(inst), \
.pclken = can_stm32fd_pclken_##inst, \
.pclk_len = DT_INST_NUM_CLOCKS(inst), \
.config_irq = config_can_##inst##_irq, \
.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(inst), \
.clock_divider = DT_INST_PROP_OR(inst, clk_divider, 0) \
}; \
\
static const struct can_mcan_config can_mcan_cfg_##inst = \
CAN_MCAN_DT_CONFIG_INST_GET(inst, &can_stm32fd_cfg_##inst, \
&can_stm32fd_ops, \
&can_stm32fd_cbs_##inst);
#define CAN_STM32FD_DATA_INST(inst) \
static struct can_mcan_data can_mcan_data_##inst = \
CAN_MCAN_DATA_INITIALIZER(NULL);
#define CAN_STM32FD_DEVICE_INST(inst) \
CAN_DEVICE_DT_INST_DEFINE(inst, can_stm32fd_init, NULL, \
&can_mcan_data_##inst, &can_mcan_cfg_##inst, \
POST_KERNEL, CONFIG_CAN_INIT_PRIORITY, \
&can_stm32fd_driver_api);
#define CAN_STM32FD_INST(inst) \
CAN_STM32FD_BUILD_ASSERT_MRAM_CFG(inst) \
CAN_STM32FD_IRQ_CFG_FUNCTION(inst) \
CAN_STM32FD_CFG_INST(inst) \
CAN_STM32FD_DATA_INST(inst) \
CAN_STM32FD_DEVICE_INST(inst)
DT_INST_FOREACH_STATUS_OKAY(CAN_STM32FD_INST)
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