// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2022 Davicom Semiconductor,Inc. * Davicom DM9051 SPI Fast Ethernet Linux driver */ #include <linux/etherdevice.h> #include <linux/ethtool.h> #include <linux/interrupt.h> #include <linux/iopoll.h> #include <linux/irq.h> #include <linux/mii.h> #include <linux/module.h> #include <linux/netdevice.h> #include <linux/phy.h> #include <linux/regmap.h> #include <linux/skbuff.h> #include <linux/spinlock.h> #include <linux/spi/spi.h> #include <linux/types.h> #include "dm9051.h" #define DRVNAME_9051 … /** * struct rx_ctl_mach - rx activities record * @status_err_counter: rx status error counter * @large_err_counter: rx get large packet length error counter * @rx_err_counter: receive packet error counter * @tx_err_counter: transmit packet error counter * @fifo_rst_counter: reset operation counter * * To keep track for the driver operation statistics */ struct rx_ctl_mach { … }; /** * struct dm9051_rxctrl - dm9051 driver rx control * @hash_table: Multicast hash-table data * @rcr_all: KS_RXCR1 register setting * * The settings needs to control the receive filtering * such as the multicast hash-filter and the receive register settings */ struct dm9051_rxctrl { … }; /** * struct dm9051_rxhdr - rx packet data header * @headbyte: lead byte equal to 0x01 notifies a valid packet * @status: status bits for the received packet * @rxlen: packet length * * The Rx packed, entered into the FIFO memory, start with these * four bytes which is the Rx header, followed by the ethernet * packet data and ends with an appended 4-byte CRC data. * Both Rx packet and CRC data are for check purpose and finally * are dropped by this driver */ struct dm9051_rxhdr { … }; /** * struct board_info - maintain the saved data * @spidev: spi device structure * @ndev: net device structure * @mdiobus: mii bus structure * @phydev: phy device structure * @txq: tx queue structure * @regmap_dm: regmap for register read/write * @regmap_dmbulk: extra regmap for bulk read/write * @rxctrl_work: Work queue for updating RX mode and multicast lists * @tx_work: Work queue for tx packets * @pause: ethtool pause parameter structure * @spi_lockm: between threads lock structure * @reg_mutex: regmap access lock structure * @bc: rx control statistics structure * @rxhdr: rx header structure * @rctl: rx control setting structure * @msg_enable: message level value * @imr_all: to store operating imr value for register DM9051_IMR * @lcr_all: to store operating rcr value for register DM9051_LMCR * * The saved data variables, keep up to date for retrieval back to use */ struct board_info { … }; static int dm9051_set_reg(struct board_info *db, unsigned int reg, unsigned int val) { … } static int dm9051_update_bits(struct board_info *db, unsigned int reg, unsigned int mask, unsigned int val) { … } /* skb buffer exhausted, just discard the received data */ static int dm9051_dumpblk(struct board_info *db, u8 reg, size_t count) { … } static int dm9051_set_regs(struct board_info *db, unsigned int reg, const void *val, size_t val_count) { … } static int dm9051_get_regs(struct board_info *db, unsigned int reg, void *val, size_t val_count) { … } static int dm9051_write_mem(struct board_info *db, unsigned int reg, const void *buff, size_t len) { … } static int dm9051_read_mem(struct board_info *db, unsigned int reg, void *buff, size_t len) { … } /* waiting tx-end rather than tx-req * got faster */ static int dm9051_nsr_poll(struct board_info *db) { … } static int dm9051_epcr_poll(struct board_info *db) { … } static int dm9051_irq_flag(struct board_info *db) { … } static unsigned int dm9051_intcr_value(struct board_info *db) { … } static int dm9051_set_fcr(struct board_info *db) { … } static int dm9051_set_recv(struct board_info *db) { … } static int dm9051_core_reset(struct board_info *db) { … } static int dm9051_update_fcr(struct board_info *db) { … } static int dm9051_disable_interrupt(struct board_info *db) { … } static int dm9051_enable_interrupt(struct board_info *db) { … } static int dm9051_stop_mrcmd(struct board_info *db) { … } static int dm9051_clear_interrupt(struct board_info *db) { … } static int dm9051_eeprom_read(struct board_info *db, int offset, u8 *to) { … } static int dm9051_eeprom_write(struct board_info *db, int offset, u8 *data) { … } static int dm9051_phyread(void *context, unsigned int reg, unsigned int *val) { … } static int dm9051_phywrite(void *context, unsigned int reg, unsigned int val) { … } static int dm9051_mdio_read(struct mii_bus *bus, int addr, int regnum) { … } static int dm9051_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val) { … } static void dm9051_reg_lock_mutex(void *dbcontext) { … } static void dm9051_reg_unlock_mutex(void *dbcontext) { … } static struct regmap_config regconfigdm = …; static struct regmap_config regconfigdmbulk = …; static int dm9051_map_init(struct spi_device *spi, struct board_info *db) { … } static int dm9051_map_chipid(struct board_info *db) { … } /* Read DM9051_PAR registers which is the mac address loaded from EEPROM while power-on */ static int dm9051_map_etherdev_par(struct net_device *ndev, struct board_info *db) { … } /* ethtool-ops */ static void dm9051_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { … } static void dm9051_set_msglevel(struct net_device *ndev, u32 value) { … } static u32 dm9051_get_msglevel(struct net_device *ndev) { … } static int dm9051_get_eeprom_len(struct net_device *dev) { … } static int dm9051_get_eeprom(struct net_device *ndev, struct ethtool_eeprom *ee, u8 *data) { … } static int dm9051_set_eeprom(struct net_device *ndev, struct ethtool_eeprom *ee, u8 *data) { … } static void dm9051_get_pauseparam(struct net_device *ndev, struct ethtool_pauseparam *pause) { … } static int dm9051_set_pauseparam(struct net_device *ndev, struct ethtool_pauseparam *pause) { … } static const struct ethtool_ops dm9051_ethtool_ops = …; static int dm9051_all_start(struct board_info *db) { … } static int dm9051_all_stop(struct board_info *db) { … } /* fifo reset while rx error found */ static int dm9051_all_restart(struct board_info *db) { … } /* read packets from the fifo memory * return value, * > 0 - read packet number, caller can repeat the rx operation * 0 - no error, caller need stop further rx operation * -EBUSY - read data error, caller escape from rx operation */ static int dm9051_loop_rx(struct board_info *db) { … } /* transmit a packet, * return value, * 0 - succeed * -ETIMEDOUT - timeout error */ static int dm9051_single_tx(struct board_info *db, u8 *buff, unsigned int len) { … } static int dm9051_loop_tx(struct board_info *db) { … } static irqreturn_t dm9051_rx_threaded_irq(int irq, void *pw) { … } static void dm9051_tx_delay(struct work_struct *work) { … } static void dm9051_rxctl_delay(struct work_struct *work) { … } /* Open network device * Called when the network device is marked active, such as a user executing * 'ifconfig up' on the device */ static int dm9051_open(struct net_device *ndev) { … } /* Close network device * Called to close down a network device which has been active. Cancel any * work, shutdown the RX and TX process and then place the chip into a low * power state while it is not being used */ static int dm9051_stop(struct net_device *ndev) { … } /* event: play a schedule starter in condition */ static netdev_tx_t dm9051_start_xmit(struct sk_buff *skb, struct net_device *ndev) { … } /* event: play with a schedule starter */ static void dm9051_set_rx_mode(struct net_device *ndev) { … } /* event: write into the mac registers and eeprom directly */ static int dm9051_set_mac_address(struct net_device *ndev, void *p) { … } static const struct net_device_ops dm9051_netdev_ops = …; static void dm9051_operation_clear(struct board_info *db) { … } static int dm9051_mdio_register(struct board_info *db) { … } static void dm9051_handle_link_change(struct net_device *ndev) { … } /* phy connect as poll mode */ static int dm9051_phy_connect(struct board_info *db) { … } static int dm9051_probe(struct spi_device *spi) { … } static void dm9051_drv_remove(struct spi_device *spi) { … } static const struct of_device_id dm9051_match_table[] = …; MODULE_DEVICE_TABLE(of, dm9051_match_table); static const struct spi_device_id dm9051_id_table[] = …; static struct spi_driver dm9051_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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