// SPDX-License-Identifier: GPL-2.0-only /* CAN bus driver for Holt HI3110 CAN Controller with SPI Interface * * Copyright(C) Timesys Corporation 2016 * * Based on Microchip 251x CAN Controller (mcp251x) Linux kernel driver * Copyright 2009 Christian Pellegrin EVOL S.r.l. * Copyright 2007 Raymarine UK, Ltd. All Rights Reserved. * Copyright 2006 Arcom Control Systems Ltd. * * Based on CAN bus driver for the CCAN controller written by * - Sascha Hauer, Marc Kleine-Budde, Pengutronix * - Simon Kallweit, intefo AG * Copyright 2007 */ #include <linux/can/core.h> #include <linux/can/dev.h> #include <linux/clk.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/ethtool.h> #include <linux/freezer.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/netdevice.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/spi/spi.h> #include <linux/uaccess.h> #define HI3110_MASTER_RESET … #define HI3110_READ_CTRL0 … #define HI3110_READ_CTRL1 … #define HI3110_READ_STATF … #define HI3110_WRITE_CTRL0 … #define HI3110_WRITE_CTRL1 … #define HI3110_WRITE_INTE … #define HI3110_WRITE_BTR0 … #define HI3110_WRITE_BTR1 … #define HI3110_READ_BTR0 … #define HI3110_READ_BTR1 … #define HI3110_READ_INTF … #define HI3110_READ_ERR … #define HI3110_READ_FIFO_WOTIME … #define HI3110_WRITE_FIFO … #define HI3110_READ_MESSTAT … #define HI3110_READ_REC … #define HI3110_READ_TEC … #define HI3110_CTRL0_MODE_MASK … #define HI3110_CTRL0_NORMAL_MODE … #define HI3110_CTRL0_LOOPBACK_MODE … #define HI3110_CTRL0_MONITOR_MODE … #define HI3110_CTRL0_SLEEP_MODE … #define HI3110_CTRL0_INIT_MODE … #define HI3110_CTRL1_TXEN … #define HI3110_INT_RXTMP … #define HI3110_INT_RXFIFO … #define HI3110_INT_TXCPLT … #define HI3110_INT_BUSERR … #define HI3110_INT_MCHG … #define HI3110_INT_WAKEUP … #define HI3110_INT_F1MESS … #define HI3110_INT_F0MESS … #define HI3110_ERR_BUSOFF … #define HI3110_ERR_TXERRP … #define HI3110_ERR_RXERRP … #define HI3110_ERR_BITERR … #define HI3110_ERR_FRMERR … #define HI3110_ERR_CRCERR … #define HI3110_ERR_ACKERR … #define HI3110_ERR_STUFERR … #define HI3110_ERR_PROTOCOL_MASK … #define HI3110_ERR_PASSIVE_MASK … #define HI3110_STAT_RXFMTY … #define HI3110_STAT_BUSOFF … #define HI3110_STAT_ERRP … #define HI3110_STAT_ERRW … #define HI3110_STAT_TXMTY … #define HI3110_BTR0_SJW_SHIFT … #define HI3110_BTR0_BRP_SHIFT … #define HI3110_BTR1_SAMP_3PERBIT … #define HI3110_BTR1_SAMP_1PERBIT … #define HI3110_BTR1_TSEG2_SHIFT … #define HI3110_BTR1_TSEG1_SHIFT … #define HI3110_FIFO_WOTIME_TAG_OFF … #define HI3110_FIFO_WOTIME_ID_OFF … #define HI3110_FIFO_WOTIME_DLC_OFF … #define HI3110_FIFO_WOTIME_DAT_OFF … #define HI3110_FIFO_WOTIME_TAG_IDE … #define HI3110_FIFO_WOTIME_ID_RTR … #define HI3110_FIFO_TAG_OFF … #define HI3110_FIFO_ID_OFF … #define HI3110_FIFO_STD_DLC_OFF … #define HI3110_FIFO_STD_DATA_OFF … #define HI3110_FIFO_EXT_DLC_OFF … #define HI3110_FIFO_EXT_DATA_OFF … #define HI3110_CAN_MAX_DATA_LEN … #define HI3110_RX_BUF_LEN … #define HI3110_TX_STD_BUF_LEN … #define HI3110_TX_EXT_BUF_LEN … #define HI3110_CAN_FRAME_MAX_BITS … #define HI3110_EFF_FLAGS … #define HI3110_TX_ECHO_SKB_MAX … #define HI3110_OST_DELAY_MS … #define DEVICE_NAME … static const struct can_bittiming_const hi3110_bittiming_const = …; enum hi3110_model { … }; struct hi3110_priv { … }; static void hi3110_clean(struct net_device *net) { … } /* Note about handling of error return of hi3110_spi_trans: accessing * registers via SPI is not really different conceptually than using * normal I/O assembler instructions, although it's much more * complicated from a practical POV. So it's not advisable to always * check the return value of this function. Imagine that every * read{b,l}, write{b,l} and friends would be bracketed in "if ( < 0) * error();", it would be a great mess (well there are some situation * when exception handling C++ like could be useful after all). So we * just check that transfers are OK at the beginning of our * conversation with the chip and to avoid doing really nasty things * (like injecting bogus packets in the network stack). */ static int hi3110_spi_trans(struct spi_device *spi, int len) { … } static int hi3110_cmd(struct spi_device *spi, u8 command) { … } static u8 hi3110_read(struct spi_device *spi, u8 command) { … } static void hi3110_write(struct spi_device *spi, u8 reg, u8 val) { … } static void hi3110_hw_tx_frame(struct spi_device *spi, u8 *buf, int len) { … } static void hi3110_hw_tx(struct spi_device *spi, struct can_frame *frame) { … } static void hi3110_hw_rx_frame(struct spi_device *spi, u8 *buf) { … } static void hi3110_hw_rx(struct spi_device *spi) { … } static void hi3110_hw_sleep(struct spi_device *spi) { … } static netdev_tx_t hi3110_hard_start_xmit(struct sk_buff *skb, struct net_device *net) { … } static int hi3110_do_set_mode(struct net_device *net, enum can_mode mode) { … } static int hi3110_get_berr_counter(const struct net_device *net, struct can_berr_counter *bec) { … } static int hi3110_set_normal_mode(struct spi_device *spi) { … } static int hi3110_do_set_bittiming(struct net_device *net) { … } static int hi3110_setup(struct net_device *net) { … } static int hi3110_hw_reset(struct spi_device *spi) { … } static int hi3110_hw_probe(struct spi_device *spi) { … } static int hi3110_power_enable(struct regulator *reg, int enable) { … } static int hi3110_stop(struct net_device *net) { … } static void hi3110_tx_work_handler(struct work_struct *ws) { … } static void hi3110_restart_work_handler(struct work_struct *ws) { … } static irqreturn_t hi3110_can_ist(int irq, void *dev_id) { … } static int hi3110_open(struct net_device *net) { … } static const struct net_device_ops hi3110_netdev_ops = …; static const struct ethtool_ops hi3110_ethtool_ops = …; static const struct of_device_id hi3110_of_match[] = …; MODULE_DEVICE_TABLE(of, hi3110_of_match); static const struct spi_device_id hi3110_id_table[] = …; MODULE_DEVICE_TABLE(spi, hi3110_id_table); static int hi3110_can_probe(struct spi_device *spi) { … } static void hi3110_can_remove(struct spi_device *spi) { … } static int __maybe_unused hi3110_can_suspend(struct device *dev) { … } static int __maybe_unused hi3110_can_resume(struct device *dev) { … } static SIMPLE_DEV_PM_OPS(hi3110_can_pm_ops, hi3110_can_suspend, hi3110_can_resume); static struct spi_driver hi3110_can_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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