// SPDX-License-Identifier: GPL-2.0+ /* Renesas R-Car CAN device driver * * Copyright (C) 2013 Cogent Embedded, Inc. <[email protected]> * Copyright (C) 2013 Renesas Solutions Corp. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/errno.h> #include <linux/ethtool.h> #include <linux/netdevice.h> #include <linux/platform_device.h> #include <linux/can/dev.h> #include <linux/clk.h> #include <linux/of.h> #define RCAR_CAN_DRV_NAME … /* Clock Select Register settings */ enum CLKR { … }; #define RCAR_SUPPORTED_CLOCKS … /* Mailbox configuration: * mailbox 60 - 63 - Rx FIFO mailboxes * mailbox 56 - 59 - Tx FIFO mailboxes * non-FIFO mailboxes are not used */ #define RCAR_CAN_N_MBX … #define RCAR_CAN_RX_FIFO_MBX … #define RCAR_CAN_TX_FIFO_MBX … #define RCAR_CAN_FIFO_DEPTH … /* Mailbox registers structure */ struct rcar_can_mbox_regs { … }; struct rcar_can_regs { … }; struct rcar_can_priv { … }; static const struct can_bittiming_const rcar_can_bittiming_const = …; /* Control Register bits */ #define RCAR_CAN_CTLR_BOM … #define RCAR_CAN_CTLR_BOM_ENT … /* at bus-off entry */ #define RCAR_CAN_CTLR_SLPM … #define RCAR_CAN_CTLR_CANM … #define RCAR_CAN_CTLR_CANM_HALT … #define RCAR_CAN_CTLR_CANM_RESET … #define RCAR_CAN_CTLR_CANM_FORCE_RESET … #define RCAR_CAN_CTLR_MLM … #define RCAR_CAN_CTLR_IDFM … #define RCAR_CAN_CTLR_IDFM_MIXED … #define RCAR_CAN_CTLR_MBM … /* Status Register bits */ #define RCAR_CAN_STR_RSTST … /* FIFO Received ID Compare Registers 0 and 1 bits */ #define RCAR_CAN_FIDCR_IDE … #define RCAR_CAN_FIDCR_RTR … /* Receive FIFO Control Register bits */ #define RCAR_CAN_RFCR_RFEST … #define RCAR_CAN_RFCR_RFE … /* Transmit FIFO Control Register bits */ #define RCAR_CAN_TFCR_TFUST … /* Number Status Bits */ #define RCAR_CAN_TFCR_TFUST_SHIFT … /* Message Number Status Bits */ #define RCAR_CAN_TFCR_TFE … #define RCAR_CAN_N_RX_MKREGS1 … /* for Rx mailboxes 0-31 */ #define RCAR_CAN_N_RX_MKREGS2 … /* Bit Configuration Register settings */ #define RCAR_CAN_BCR_TSEG1(x) … #define RCAR_CAN_BCR_BPR(x) … #define RCAR_CAN_BCR_SJW(x) … #define RCAR_CAN_BCR_TSEG2(x) … /* Mailbox and Mask Registers bits */ #define RCAR_CAN_IDE … #define RCAR_CAN_RTR … #define RCAR_CAN_SID_SHIFT … /* Mailbox Interrupt Enable Register 1 bits */ #define RCAR_CAN_MIER1_RXFIE … #define RCAR_CAN_MIER1_TXFIE … /* Interrupt Enable Register bits */ #define RCAR_CAN_IER_ERSIE … #define RCAR_CAN_IER_RXFIE … /* Enable Bit */ #define RCAR_CAN_IER_TXFIE … /* Enable Bit */ /* Interrupt Status Register bits */ #define RCAR_CAN_ISR_ERSF … #define RCAR_CAN_ISR_RXFF … /* Status Bit */ #define RCAR_CAN_ISR_TXFF … /* Status Bit */ /* Error Interrupt Enable Register bits */ #define RCAR_CAN_EIER_BLIE … #define RCAR_CAN_EIER_OLIE … /* Interrupt Enable */ #define RCAR_CAN_EIER_ORIE … #define RCAR_CAN_EIER_BORIE … #define RCAR_CAN_EIER_BOEIE … #define RCAR_CAN_EIER_EPIE … #define RCAR_CAN_EIER_EWIE … #define RCAR_CAN_EIER_BEIE … /* Error Interrupt Factor Judge Register bits */ #define RCAR_CAN_EIFR_BLIF … #define RCAR_CAN_EIFR_OLIF … /* Detect Flag */ #define RCAR_CAN_EIFR_ORIF … #define RCAR_CAN_EIFR_BORIF … #define RCAR_CAN_EIFR_BOEIF … #define RCAR_CAN_EIFR_EPIF … #define RCAR_CAN_EIFR_EWIF … #define RCAR_CAN_EIFR_BEIF … /* Error Code Store Register bits */ #define RCAR_CAN_ECSR_EDPM … #define RCAR_CAN_ECSR_ADEF … #define RCAR_CAN_ECSR_BE0F … #define RCAR_CAN_ECSR_BE1F … #define RCAR_CAN_ECSR_CEF … #define RCAR_CAN_ECSR_AEF … #define RCAR_CAN_ECSR_FEF … #define RCAR_CAN_ECSR_SEF … #define RCAR_CAN_NAPI_WEIGHT … #define MAX_STR_READS … static void tx_failure_cleanup(struct net_device *ndev) { … } static void rcar_can_error(struct net_device *ndev) { … } static void rcar_can_tx_done(struct net_device *ndev) { … } static irqreturn_t rcar_can_interrupt(int irq, void *dev_id) { … } static void rcar_can_set_bittiming(struct net_device *dev) { … } static void rcar_can_start(struct net_device *ndev) { … } static int rcar_can_open(struct net_device *ndev) { … } static void rcar_can_stop(struct net_device *ndev) { … } static int rcar_can_close(struct net_device *ndev) { … } static netdev_tx_t rcar_can_start_xmit(struct sk_buff *skb, struct net_device *ndev) { … } static const struct net_device_ops rcar_can_netdev_ops = …; static const struct ethtool_ops rcar_can_ethtool_ops = …; static void rcar_can_rx_pkt(struct rcar_can_priv *priv) { … } static int rcar_can_rx_poll(struct napi_struct *napi, int quota) { … } static int rcar_can_do_set_mode(struct net_device *ndev, enum can_mode mode) { … } static int rcar_can_get_berr_counter(const struct net_device *dev, struct can_berr_counter *bec) { … } static const char * const clock_names[] = …; static int rcar_can_probe(struct platform_device *pdev) { … } static void rcar_can_remove(struct platform_device *pdev) { … } static int __maybe_unused rcar_can_suspend(struct device *dev) { … } static int __maybe_unused rcar_can_resume(struct device *dev) { … } static SIMPLE_DEV_PM_OPS(rcar_can_pm_ops, rcar_can_suspend, rcar_can_resume); static const struct of_device_id rcar_can_of_table[] __maybe_unused = …; MODULE_DEVICE_TABLE(of, rcar_can_of_table); static struct platform_driver rcar_can_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …; MODULE_ALIAS(…) …;
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