diff options
Diffstat (limited to 'drivers/net/ethernet/davicom')
| -rw-r--r-- | drivers/net/ethernet/davicom/Kconfig | 31 | ||||
| -rw-r--r-- | drivers/net/ethernet/davicom/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/davicom/dm9051.c | 1260 | ||||
| -rw-r--r-- | drivers/net/ethernet/davicom/dm9051.h | 162 |
4 files changed, 1454 insertions, 0 deletions
diff --git a/drivers/net/ethernet/davicom/Kconfig b/drivers/net/ethernet/davicom/Kconfig index 7af86b6d4150..02e0caff98e3 100644 --- a/drivers/net/ethernet/davicom/Kconfig +++ b/drivers/net/ethernet/davicom/Kconfig @@ -3,6 +3,19 @@ # Davicom device configuration # +config NET_VENDOR_DAVICOM + bool "Davicom devices" + default y + help + If you have a network (Ethernet) card belonging to this class, say Y. + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about Davicom devices. If you say Y, you will be asked + for your specific card in the following selections. + +if NET_VENDOR_DAVICOM + config DM9000 tristate "DM9000 support" depends on ARM || MIPS || COLDFIRE || NIOS2 || COMPILE_TEST @@ -22,3 +35,21 @@ config DM9000_FORCE_SIMPLE_PHY_POLL bit to determine if the link is up or down instead of the more costly MII PHY reads. Note, this will not work if the chip is operating with an external PHY. + +config DM9051 + tristate "DM9051 SPI support" + depends on SPI + select CRC32 + select MDIO + select PHYLIB + select REGMAP_SPI + help + Support for DM9051 SPI chipset. + + To compile this driver as a module, choose M here. The module + will be called dm9051. + + The SPI mode for the host's SPI master to access DM9051 is mode + 0 on the SPI bus. + +endif # NET_VENDOR_DAVICOM diff --git a/drivers/net/ethernet/davicom/Makefile b/drivers/net/ethernet/davicom/Makefile index 173c87d21076..225f85bc1f53 100644 --- a/drivers/net/ethernet/davicom/Makefile +++ b/drivers/net/ethernet/davicom/Makefile @@ -4,3 +4,4 @@ # obj-$(CONFIG_DM9000) += dm9000.o +obj-$(CONFIG_DM9051) += dm9051.o diff --git a/drivers/net/ethernet/davicom/dm9051.c b/drivers/net/ethernet/davicom/dm9051.c new file mode 100644 index 000000000000..a523ddda7609 --- /dev/null +++ b/drivers/net/ethernet/davicom/dm9051.c @@ -0,0 +1,1260 @@ +// 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 "dm9051" + +/** + * 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 { + u16 status_err_counter; + u16 large_err_counter; + u16 rx_err_counter; + u16 tx_err_counter; + u16 fifo_rst_counter; +}; + +/** + * 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 { + u16 hash_table[4]; + u8 rcr_all; +}; + +/** + * 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 { + u8 headbyte; + u8 status; + __le16 rxlen; +}; + +/** + * 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 { + u32 msg_enable; + struct spi_device *spidev; + struct net_device *ndev; + struct mii_bus *mdiobus; + struct phy_device *phydev; + struct sk_buff_head txq; + struct regmap *regmap_dm; + struct regmap *regmap_dmbulk; + struct work_struct rxctrl_work; + struct work_struct tx_work; + struct ethtool_pauseparam pause; + struct mutex spi_lockm; + struct mutex reg_mutex; + struct rx_ctl_mach bc; + struct dm9051_rxhdr rxhdr; + struct dm9051_rxctrl rctl; + u8 imr_all; + u8 lcr_all; +}; + +static int dm9051_set_reg(struct board_info *db, unsigned int reg, unsigned int val) +{ + int ret; + + ret = regmap_write(db->regmap_dm, reg, val); + if (ret < 0) + netif_err(db, drv, db->ndev, "%s: error %d set reg %02x\n", + __func__, ret, reg); + return ret; +} + +static int dm9051_update_bits(struct board_info *db, unsigned int reg, unsigned int mask, + unsigned int val) +{ + int ret; + + ret = regmap_update_bits(db->regmap_dm, reg, mask, val); + if (ret < 0) + netif_err(db, drv, db->ndev, "%s: error %d update bits reg %02x\n", + __func__, ret, reg); + return ret; +} + +/* skb buffer exhausted, just discard the received data + */ +static int dm9051_dumpblk(struct board_info *db, u8 reg, size_t count) +{ + struct net_device *ndev = db->ndev; + unsigned int rb; + int ret; + + /* no skb buffer, + * both reg and &rb must be noinc, + * read once one byte via regmap_read + */ + do { + ret = regmap_read(db->regmap_dm, reg, &rb); + if (ret < 0) { + netif_err(db, drv, ndev, "%s: error %d dumping read reg %02x\n", + __func__, ret, reg); + break; + } + } while (--count); + + return ret; +} + +static int dm9051_set_regs(struct board_info *db, unsigned int reg, const void *val, + size_t val_count) +{ + int ret; + + ret = regmap_bulk_write(db->regmap_dmbulk, reg, val, val_count); + if (ret < 0) + netif_err(db, drv, db->ndev, "%s: error %d bulk writing regs %02x\n", + __func__, ret, reg); + return ret; +} + +static int dm9051_get_regs(struct board_info *db, unsigned int reg, void *val, + size_t val_count) +{ + int ret; + + ret = regmap_bulk_read(db->regmap_dmbulk, reg, val, val_count); + if (ret < 0) + netif_err(db, drv, db->ndev, "%s: error %d bulk reading regs %02x\n", + __func__, ret, reg); + return ret; +} + +static int dm9051_write_mem(struct board_info *db, unsigned int reg, const void *buff, + size_t len) +{ + int ret; + + ret = regmap_noinc_write(db->regmap_dm, reg, buff, len); + if (ret < 0) + netif_err(db, drv, db->ndev, "%s: error %d noinc writing regs %02x\n", + __func__, ret, reg); + return ret; +} + +static int dm9051_read_mem(struct board_info *db, unsigned int reg, void *buff, + size_t len) +{ + int ret; + + ret = regmap_noinc_read(db->regmap_dm, reg, buff, len); + if (ret < 0) + netif_err(db, drv, db->ndev, "%s: error %d noinc reading regs %02x\n", + __func__, ret, reg); + return ret; +} + +/* waiting tx-end rather than tx-req + * got faster + */ +static int dm9051_nsr_poll(struct board_info *db) +{ + unsigned int mval; + int ret; + + ret = regmap_read_poll_timeout(db->regmap_dm, DM9051_NSR, mval, + mval & (NSR_TX2END | NSR_TX1END), 1, 20); + if (ret == -ETIMEDOUT) + netdev_err(db->ndev, "timeout in checking for tx end\n"); + return ret; +} + +static int dm9051_epcr_poll(struct board_info *db) +{ + unsigned int mval; + int ret; + + ret = regmap_read_poll_timeout(db->regmap_dm, DM9051_EPCR, mval, + !(mval & EPCR_ERRE), 100, 10000); + if (ret == -ETIMEDOUT) + netdev_err(db->ndev, "eeprom/phy in processing get timeout\n"); + return ret; +} + +static int dm9051_irq_flag(struct board_info *db) +{ + struct spi_device *spi = db->spidev; + int irq_type = irq_get_trigger_type(spi->irq); + + if (irq_type) + return irq_type; + + return IRQF_TRIGGER_LOW; +} + +static unsigned int dm9051_intcr_value(struct board_info *db) +{ + return (dm9051_irq_flag(db) == IRQF_TRIGGER_LOW) ? + INTCR_POL_LOW : INTCR_POL_HIGH; +} + +static int dm9051_set_fcr(struct board_info *db) +{ + u8 fcr = 0; + + if (db->pause.rx_pause) + fcr |= FCR_BKPM | FCR_FLCE; + if (db->pause.tx_pause) + fcr |= FCR_TXPEN; + + return dm9051_set_reg(db, DM9051_FCR, fcr); +} + +static int dm9051_set_recv(struct board_info *db) +{ + int ret; + + ret = dm9051_set_regs(db, DM9051_MAR, db->rctl.hash_table, sizeof(db->rctl.hash_table)); + if (ret) + return ret; + + return dm9051_set_reg(db, DM9051_RCR, db->rctl.rcr_all); /* enable rx */ +} + +static int dm9051_core_reset(struct board_info *db) +{ + int ret; + + db->bc.fifo_rst_counter++; + + ret = regmap_write(db->regmap_dm, DM9051_NCR, NCR_RST); /* NCR reset */ + if (ret) + return ret; + ret = regmap_write(db->regmap_dm, DM9051_MBNDRY, MBNDRY_BYTE); /* MemBound */ + if (ret) + return ret; + ret = regmap_write(db->regmap_dm, DM9051_PPCR, PPCR_PAUSE_COUNT); /* Pause Count */ + if (ret) + return ret; + ret = regmap_write(db->regmap_dm, DM9051_LMCR, db->lcr_all); /* LEDMode1 */ + if (ret) + return ret; + + return dm9051_set_reg(db, DM9051_INTCR, dm9051_intcr_value(db)); +} + +static int dm9051_update_fcr(struct board_info *db) +{ + u8 fcr = 0; + + if (db->pause.rx_pause) + fcr |= FCR_BKPM | FCR_FLCE; + if (db->pause.tx_pause) + fcr |= FCR_TXPEN; + + return dm9051_update_bits(db, DM9051_FCR, FCR_RXTX_BITS, fcr); +} + +static int dm9051_disable_interrupt(struct board_info *db) +{ + return dm9051_set_reg(db, DM9051_IMR, IMR_PAR); /* disable int */ +} + +static int dm9051_enable_interrupt(struct board_info *db) +{ + return dm9051_set_reg(db, DM9051_IMR, db->imr_all); /* enable int */ +} + +static int dm9051_stop_mrcmd(struct board_info *db) +{ + return dm9051_set_reg(db, DM9051_ISR, ISR_STOP_MRCMD); /* to stop mrcmd */ +} + +static int dm9051_clear_interrupt(struct board_info *db) +{ + return dm9051_update_bits(db, DM9051_ISR, ISR_CLR_INT, ISR_CLR_INT); +} + +static int dm9051_eeprom_read(struct board_info *db, int offset, u8 *to) +{ + int ret; + + ret = regmap_write(db->regmap_dm, DM9051_EPAR, offset); + if (ret) + return ret; + + ret = regmap_write(db->regmap_dm, DM9051_EPCR, EPCR_ERPRR); + if (ret) + return ret; + + ret = dm9051_epcr_poll(db); + if (ret) + return ret; + + ret = regmap_write(db->regmap_dm, DM9051_EPCR, 0); + if (ret) + return ret; + + return regmap_bulk_read(db->regmap_dmbulk, DM9051_EPDRL, to, 2); +} + +static int dm9051_eeprom_write(struct board_info *db, int offset, u8 *data) +{ + int ret; + + ret = regmap_write(db->regmap_dm, DM9051_EPAR, offset); + if (ret) + return ret; + + ret = regmap_bulk_write(db->regmap_dmbulk, DM9051_EPDRL, data, 2); + if (ret < 0) + return ret; + + ret = regmap_write(db->regmap_dm, DM9051_EPCR, EPCR_WEP | EPCR_ERPRW); + if (ret) + return ret; + + ret = dm9051_epcr_poll(db); + if (ret) + return ret; + + return regmap_write(db->regmap_dm, DM9051_EPCR, 0); +} + +static int dm9051_phyread(void *context, unsigned int reg, unsigned int *val) +{ + struct board_info *db = context; + int ret; + + ret = regmap_write(db->regmap_dm, DM9051_EPAR, DM9051_PHY | reg); + if (ret) + return ret; + + ret = regmap_write(db->regmap_dm, DM9051_EPCR, EPCR_ERPRR | EPCR_EPOS); + if (ret) + return ret; + + ret = dm9051_epcr_poll(db); + if (ret) + return ret; + + ret = regmap_write(db->regmap_dm, DM9051_EPCR, 0); + if (ret) + return ret; + + /* this is a 4 bytes data, clear to zero since following regmap_bulk_read + * only fill lower 2 bytes + */ + *val = 0; + return regmap_bulk_read(db->regmap_dmbulk, DM9051_EPDRL, val, 2); +} + +static int dm9051_phywrite(void *context, unsigned int reg, unsigned int val) +{ + struct board_info *db = context; + int ret; + + ret = regmap_write(db->regmap_dm, DM9051_EPAR, DM9051_PHY | reg); + if (ret) + return ret; + + ret = regmap_bulk_write(db->regmap_dmbulk, DM9051_EPDRL, &val, 2); + if (ret < 0) + return ret; + + ret = regmap_write(db->regmap_dm, DM9051_EPCR, EPCR_EPOS | EPCR_ERPRW); + if (ret) + return ret; + + ret = dm9051_epcr_poll(db); + if (ret) + return ret; + + return regmap_write(db->regmap_dm, DM9051_EPCR, 0); +} + +static int dm9051_mdio_read(struct mii_bus *bus, int addr, int regnum) +{ + struct board_info *db = bus->priv; + unsigned int val = 0xffff; + int ret; + + if (addr == DM9051_PHY_ADDR) { + ret = dm9051_phyread(db, regnum, &val); + if (ret) + return ret; + } + + return val; +} + +static int dm9051_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val) +{ + struct board_info *db = bus->priv; + + if (addr == DM9051_PHY_ADDR) + return dm9051_phywrite(db, regnum, val); + + return -ENODEV; +} + +static void dm9051_reg_lock_mutex(void *dbcontext) +{ + struct board_info *db = dbcontext; + + mutex_lock(&db->reg_mutex); +} + +static void dm9051_reg_unlock_mutex(void *dbcontext) +{ + struct board_info *db = dbcontext; + + mutex_unlock(&db->reg_mutex); +} + +static struct regmap_config regconfigdm = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0xff, + .reg_stride = 1, + .cache_type = REGCACHE_NONE, + .read_flag_mask = 0, + .write_flag_mask = DM_SPI_WR, + .val_format_endian = REGMAP_ENDIAN_LITTLE, + .lock = dm9051_reg_lock_mutex, + .unlock = dm9051_reg_unlock_mutex, +}; + +static struct regmap_config regconfigdmbulk = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0xff, + .reg_stride = 1, + .cache_type = REGCACHE_NONE, + .read_flag_mask = 0, + .write_flag_mask = DM_SPI_WR, + .val_format_endian = REGMAP_ENDIAN_LITTLE, + .lock = dm9051_reg_lock_mutex, + .unlock = dm9051_reg_unlock_mutex, + .use_single_read = true, + .use_single_write = true, +}; + +static int dm9051_map_init(struct spi_device *spi, struct board_info *db) +{ + /* create two regmap instances, + * split read/write and bulk_read/bulk_write to individual regmap + * to resolve regmap execution confliction problem + */ + regconfigdm.lock_arg = db; + db->regmap_dm = devm_regmap_init_spi(db->spidev, ®configdm); + if (IS_ERR(db->regmap_dm)) + return PTR_ERR(db->regmap_dm); + + regconfigdmbulk.lock_arg = db; + db->regmap_dmbulk = devm_regmap_init_spi(db->spidev, ®configdmbulk); + if (IS_ERR(db->regmap_dmbulk)) + return PTR_ERR(db->regmap_dmbulk); + + return 0; +} + +static int dm9051_map_chipid(struct board_info *db) +{ + struct device *dev = &db->spidev->dev; + unsigned short wid; + u8 buff[6]; + int ret; + + ret = dm9051_get_regs(db, DM9051_VIDL, buff, sizeof(buff)); + if (ret < 0) + return ret; + + wid = get_unaligned_le16(buff + 2); + if (wid != DM9051_ID) { + dev_err(dev, "chipid error as %04x !\n", wid); + return -ENODEV; + } + + dev_info(dev, "chip %04x found\n", wid); + return 0; +} + +/* 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) +{ + u8 addr[ETH_ALEN]; + int ret; + + ret = dm9051_get_regs(db, DM9051_PAR, addr, sizeof(addr)); + if (ret < 0) + return ret; + + if (!is_valid_ether_addr(addr)) { + eth_hw_addr_random(ndev); + + ret = dm9051_set_regs(db, DM9051_PAR, ndev->dev_addr, sizeof(ndev->dev_addr)); + if (ret < 0) + return ret; + + dev_dbg(&db->spidev->dev, "Use random MAC address\n"); + return 0; + } + + eth_hw_addr_set(ndev, addr); + return 0; +} + +/* ethtool-ops + */ +static void dm9051_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + strscpy(info->driver, DRVNAME_9051, sizeof(info->driver)); +} + +static void dm9051_set_msglevel(struct net_device *ndev, u32 value) +{ + struct board_info *db = to_dm9051_board(ndev); + + db->msg_enable = value; +} + +static u32 dm9051_get_msglevel(struct net_device *ndev) +{ + struct board_info *db = to_dm9051_board(ndev); + + return db->msg_enable; +} + +static int dm9051_get_eeprom_len(struct net_device *dev) +{ + return 128; +} + +static int dm9051_get_eeprom(struct net_device *ndev, + struct ethtool_eeprom *ee, u8 *data) +{ + struct board_info *db = to_dm9051_board(ndev); + int offset = ee->offset; + int len = ee->len; + int i, ret; + + if ((len | offset) & 1) + return -EINVAL; + + ee->magic = DM_EEPROM_MAGIC; + + for (i = 0; i < len; i += 2) { + ret = dm9051_eeprom_read(db, (offset + i) / 2, data + i); + if (ret) + break; + } + return ret; +} + +static int dm9051_set_eeprom(struct net_device *ndev, + struct ethtool_eeprom *ee, u8 *data) +{ + struct board_info *db = to_dm9051_board(ndev); + int offset = ee->offset; + int len = ee->len; + int i, ret; + + if ((len | offset) & 1) + return -EINVAL; + + if (ee->magic != DM_EEPROM_MAGIC) + return -EINVAL; + + for (i = 0; i < len; i += 2) { + ret = dm9051_eeprom_write(db, (offset + i) / 2, data + i); + if (ret) + break; + } + return ret; +} + +static void dm9051_get_pauseparam(struct net_device *ndev, + struct ethtool_pauseparam *pause) +{ + struct board_info *db = to_dm9051_board(ndev); + + *pause = db->pause; +} + +static int dm9051_set_pauseparam(struct net_device *ndev, + struct ethtool_pauseparam *pause) +{ + struct board_info *db = to_dm9051_board(ndev); + + db->pause = *pause; + + if (pause->autoneg == AUTONEG_DISABLE) + return dm9051_update_fcr(db); + + phy_set_sym_pause(db->phydev, pause->rx_pause, pause->tx_pause, + pause->autoneg); + phy_start_aneg(db->phydev); + return 0; +} + +static const struct ethtool_ops dm9051_ethtool_ops = { + .get_drvinfo = dm9051_get_drvinfo, + .get_link_ksettings = phy_ethtool_get_link_ksettings, + .set_link_ksettings = phy_ethtool_set_link_ksettings, + .get_msglevel = dm9051_get_msglevel, + .set_msglevel = dm9051_set_msglevel, + .nway_reset = phy_ethtool_nway_reset, + .get_link = ethtool_op_get_link, + .get_eeprom_len = dm9051_get_eeprom_len, + .get_eeprom = dm9051_get_eeprom, + .set_eeprom = dm9051_set_eeprom, + .get_pauseparam = dm9051_get_pauseparam, + .set_pauseparam = dm9051_set_pauseparam, +}; + +static int dm9051_all_start(struct board_info *db) +{ + int ret; + + /* GPR power on of the internal phy + */ + ret = dm9051_set_reg(db, DM9051_GPR, 0); + if (ret) + return ret; + + /* dm9051 chip registers could not be accessed within 1 ms + * after GPR power on, delay 1 ms is essential + */ + msleep(1); + + ret = dm9051_core_reset(db); + if (ret) + return ret; + + return dm9051_enable_interrupt(db); +} + +static int dm9051_all_stop(struct board_info *db) +{ + int ret; + + /* GPR power off of the internal phy, + * The internal phy still could be accessed after this GPR power off control + */ + ret = dm9051_set_reg(db, DM9051_GPR, GPR_PHY_OFF); + if (ret) + return ret; + + return dm9051_set_reg(db, DM9051_RCR, RCR_RX_DISABLE); +} + +/* fifo reset while rx error found + */ +static int dm9051_all_restart(struct board_info *db) +{ + struct net_device *ndev = db->ndev; + int ret; + + ret = dm9051_core_reset(db); + if (ret) + return ret; + + ret = dm9051_enable_interrupt(db); + if (ret) + return ret; + + netdev_dbg(ndev, " rxstatus_Er & rxlen_Er %d, RST_c %d\n", + db->bc.status_err_counter + db->bc.large_err_counter, + db->bc.fifo_rst_counter); + + ret = dm9051_set_recv(db); + if (ret) + return ret; + + return dm9051_set_fcr(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) +{ + struct net_device *ndev = db->ndev; + unsigned int rxbyte; + int ret, rxlen; + struct sk_buff *skb; + u8 *rdptr; + int scanrr = 0; + + do { + ret = dm9051_read_mem(db, DM_SPI_MRCMDX, &rxbyte, 2); + if (ret) + return ret; + + if ((rxbyte & GENMASK(7, 0)) != DM9051_PKT_RDY) + break; /* exhaust-empty */ + + ret = dm9051_read_mem(db, DM_SPI_MRCMD, &db->rxhdr, DM_RXHDR_SIZE); + if (ret) + return ret; + + ret = dm9051_stop_mrcmd(db); + if (ret) + return ret; + + rxlen = le16_to_cpu(db->rxhdr.rxlen); + if (db->rxhdr.status & RSR_ERR_BITS || rxlen > DM9051_PKT_MAX) { + netdev_dbg(ndev, "rxhdr-byte (%02x)\n", + db->rxhdr.headbyte); + + if (db->rxhdr.status & RSR_ERR_BITS) { + db->bc.status_err_counter++; + netdev_dbg(ndev, "check rxstatus-error (%02x)\n", + db->rxhdr.status); + } else { + db->bc.large_err_counter++; + netdev_dbg(ndev, "check rxlen large-error (%d > %d)\n", + rxlen, DM9051_PKT_MAX); + } + return dm9051_all_restart(db); + } + + skb = dev_alloc_skb(rxlen); + if (!skb) { + ret = dm9051_dumpblk(db, DM_SPI_MRCMD, rxlen); + if (ret) + return ret; + return scanrr; + } + + rdptr = skb_put(skb, rxlen - 4); + ret = dm9051_read_mem(db, DM_SPI_MRCMD, rdptr, rxlen); + if (ret) { + db->bc.rx_err_counter++; + dev_kfree_skb(skb); + return ret; + } + + ret = dm9051_stop_mrcmd(db); + if (ret) + return ret; + + skb->protocol = eth_type_trans(skb, db->ndev); + if (db->ndev->features & NETIF_F_RXCSUM) + skb_checksum_none_assert(skb); + netif_rx(skb); + db->ndev->stats.rx_bytes += rxlen; + db->ndev->stats.rx_packets++; + scanrr++; + } while (!ret); + + return scanrr; +} + +/* transmit a packet, + * return value, + * 0 - succeed + * -ETIMEDOUT - timeout error + */ +static int dm9051_single_tx(struct board_info *db, u8 *buff, unsigned int len) +{ + int ret; + + ret = dm9051_nsr_poll(db); + if (ret) + return ret; + + ret = dm9051_write_mem(db, DM_SPI_MWCMD, buff, len); + if (ret) + return ret; + + ret = dm9051_set_regs(db, DM9051_TXPLL, &len, 2); + if (ret < 0) + return ret; + + return dm9051_set_reg(db, DM9051_TCR, TCR_TXREQ); +} + +static int dm9051_loop_tx(struct board_info *db) +{ + struct net_device *ndev = db->ndev; + int ntx = 0; + int ret; + + while (!skb_queue_empty(&db->txq)) { + struct sk_buff *skb; + unsigned int len; + + skb = skb_dequeue(&db->txq); + if (skb) { + ntx++; + ret = dm9051_single_tx(db, skb->data, skb->len); + len = skb->len; + dev_kfree_skb(skb); + if (ret < 0) { + db->bc.tx_err_counter++; + return 0; + } + ndev->stats.tx_bytes += len; + ndev->stats.tx_packets++; + } + + if (netif_queue_stopped(ndev) && + (skb_queue_len(&db->txq) < DM9051_TX_QUE_LO_WATER)) + netif_wake_queue(ndev); + } + + return ntx; +} + +static irqreturn_t dm9051_rx_threaded_irq(int irq, void *pw) +{ + struct board_info *db = pw; + int result, result_tx; + + mutex_lock(&db->spi_lockm); + + result = dm9051_disable_interrupt(db); + if (result) + goto out_unlock; + + result = dm9051_clear_interrupt(db); + if (result) + goto out_unlock; + + do { + result = dm9051_loop_rx(db); /* threaded irq rx */ + if (result < 0) + goto out_unlock; + result_tx = dm9051_loop_tx(db); /* more tx better performance */ + if (result_tx < 0) + goto out_unlock; + } while (result > 0); + + dm9051_enable_interrupt(db); + + /* To exit and has mutex unlock while rx or tx error + */ +out_unlock: + mutex_unlock(&db->spi_lockm); + + return IRQ_HANDLED; +} + +static void dm9051_tx_delay(struct work_struct *work) +{ + struct board_info *db = container_of(work, struct board_info, tx_work); + int result; + + mutex_lock(&db->spi_lockm); + + result = dm9051_loop_tx(db); + if (result < 0) + netdev_err(db->ndev, "transmit packet error\n"); + + mutex_unlock(&db->spi_lockm); +} + +static void dm9051_rxctl_delay(struct work_struct *work) +{ + struct board_info *db = container_of(work, struct board_info, rxctrl_work); + struct net_device *ndev = db->ndev; + int result; + + mutex_lock(&db->spi_lockm); + + result = dm9051_set_regs(db, DM9051_PAR, ndev->dev_addr, sizeof(ndev->dev_addr)); + if (result < 0) + goto out_unlock; + + dm9051_set_recv(db); + + /* To has mutex unlock and return from this function if regmap function fail + */ +out_unlock: + mutex_unlock(&db->spi_lockm); +} + +/* 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) +{ + struct board_info *db = to_dm9051_board(ndev); + struct spi_device *spi = db->spidev; + int ret; + + db->imr_all = IMR_PAR | IMR_PRM; + db->lcr_all = LMCR_MODE1; + db->rctl.rcr_all = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN; + memset(db->rctl.hash_table, 0, sizeof(db->rctl.hash_table)); + + ndev->irq = spi->irq; /* by dts */ + ret = request_threaded_irq(spi->irq, NULL, dm9051_rx_threaded_irq, + dm9051_irq_flag(db) | IRQF_ONESHOT, + ndev->name, db); + if (ret < 0) { + netdev_err(ndev, "failed to get irq\n"); + return ret; + } + + phy_support_sym_pause(db->phydev); + phy_start(db->phydev); + + /* flow control parameters init */ + db->pause.rx_pause = true; + db->pause.tx_pause = true; + db->pause.autoneg = AUTONEG_DISABLE; + + if (db->phydev->autoneg) + db->pause.autoneg = AUTONEG_ENABLE; + + ret = dm9051_all_start(db); + if (ret) { + phy_stop(db->phydev); + free_irq(spi->irq, db); + return ret; + } + + netif_wake_queue(ndev); + + return 0; +} + +/* 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) +{ + struct board_info *db = to_dm9051_board(ndev); + int ret; + + ret = dm9051_all_stop(db); + if (ret) + return ret; + + flush_work(&db->tx_work); + flush_work(&db->rxctrl_work); + + phy_stop(db->phydev); + + free_irq(db->spidev->irq, db); + + netif_stop_queue(ndev); + + skb_queue_purge(&db->txq); + + return 0; +} + +/* event: play a schedule starter in condition + */ +static netdev_tx_t dm9051_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + struct board_info *db = to_dm9051_board(ndev); + + skb_queue_tail(&db->txq, skb); + if (skb_queue_len(&db->txq) > DM9051_TX_QUE_HI_WATER) + netif_stop_queue(ndev); /* enforce limit queue size */ + + schedule_work(&db->tx_work); + + return NETDEV_TX_OK; +} + +/* event: play with a schedule starter + */ +static void dm9051_set_rx_mode(struct net_device *ndev) +{ + struct board_info *db = to_dm9051_board(ndev); + struct dm9051_rxctrl rxctrl; + struct netdev_hw_addr *ha; + u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN; + u32 hash_val; + + memset(&rxctrl, 0, sizeof(rxctrl)); + + /* rx control */ + if (ndev->flags & IFF_PROMISC) { + rcr |= RCR_PRMSC; + netdev_dbg(ndev, "set_multicast rcr |= RCR_PRMSC, rcr= %02x\n", rcr); + } + + if (ndev->flags & IFF_ALLMULTI) { + rcr |= RCR_ALL; + netdev_dbg(ndev, "set_multicast rcr |= RCR_ALLMULTI, rcr= %02x\n", rcr); + } + + rxctrl.rcr_all = rcr; + + /* broadcast address */ + rxctrl.hash_table[0] = 0; + rxctrl.hash_table[1] = 0; + rxctrl.hash_table[2] = 0; + rxctrl.hash_table[3] = 0x8000; + + /* the multicast address in Hash Table : 64 bits */ + netdev_for_each_mc_addr(ha, ndev) { + hash_val = ether_crc_le(ETH_ALEN, ha->addr) & GENMASK(5, 0); + rxctrl.hash_table[hash_val / 16] |= BIT(0) << (hash_val % 16); + } + + /* schedule work to do the actual set of the data if needed */ + + if (memcmp(&db->rctl, &rxctrl, sizeof(rxctrl))) { + memcpy(&db->rctl, &rxctrl, sizeof(rxctrl)); + schedule_work(&db->rxctrl_work); + } +} + +/* event: write into the mac registers and eeprom directly + */ +static int dm9051_set_mac_address(struct net_device *ndev, void *p) +{ + struct board_info *db = to_dm9051_board(ndev); + int ret; + + ret = eth_prepare_mac_addr_change(ndev, p); + if (ret < 0) + return ret; + + eth_commit_mac_addr_change(ndev, p); + return dm9051_set_regs(db, DM9051_PAR, ndev->dev_addr, sizeof(ndev->dev_addr)); +} + +static const struct net_device_ops dm9051_netdev_ops = { + .ndo_open = dm9051_open, + .ndo_stop = dm9051_stop, + .ndo_start_xmit = dm9051_start_xmit, + .ndo_set_rx_mode = dm9051_set_rx_mode, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = dm9051_set_mac_address, +}; + +static void dm9051_operation_clear(struct board_info *db) +{ + db->bc.status_err_counter = 0; + db->bc.large_err_counter = 0; + db->bc.rx_err_counter = 0; + db->bc.tx_err_counter = 0; + db->bc.fifo_rst_counter = 0; +} + +static int dm9051_mdio_register(struct board_info *db) +{ + struct spi_device *spi = db->spidev; + int ret; + + db->mdiobus = devm_mdiobus_alloc(&spi->dev); + if (!db->mdiobus) + return -ENOMEM; + + db->mdiobus->priv = db; + db->mdiobus->read = dm9051_mdio_read; + db->mdiobus->write = dm9051_mdio_write; + db->mdiobus->name = "dm9051-mdiobus"; + db->mdiobus->phy_mask = (u32)~BIT(1); + db->mdiobus->parent = &spi->dev; + snprintf(db->mdiobus->id, MII_BUS_ID_SIZE, + "dm9051-%s.%u", dev_name(&spi->dev), spi->chip_select); + + ret = devm_mdiobus_register(&spi->dev, db->mdiobus); + if (ret) + dev_err(&spi->dev, "Could not register MDIO bus\n"); + + return ret; +} + +static void dm9051_handle_link_change(struct net_device *ndev) +{ + struct board_info *db = to_dm9051_board(ndev); + + phy_print_status(db->phydev); + + /* only write pause settings to mac. since mac and phy are integrated + * together, such as link state, speed and duplex are sync already + */ + if (db->phydev->link) { + if (db->phydev->pause) { + db->pause.rx_pause = true; + db->pause.tx_pause = true; + } + dm9051_update_fcr(db); + } +} + +/* phy connect as poll mode + */ +static int dm9051_phy_connect(struct board_info *db) +{ + char phy_id[MII_BUS_ID_SIZE + 3]; + + snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, + db->mdiobus->id, DM9051_PHY_ADDR); + + db->phydev = phy_connect(db->ndev, phy_id, dm9051_handle_link_change, + PHY_INTERFACE_MODE_MII); + if (IS_ERR(db->phydev)) + return PTR_ERR_OR_ZERO(db->phydev); + return 0; +} + +static int dm9051_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct net_device *ndev; + struct board_info *db; + int ret; + + ndev = devm_alloc_etherdev(dev, sizeof(struct board_info)); + if (!ndev) + return -ENOMEM; + + SET_NETDEV_DEV(ndev, dev); + dev_set_drvdata(dev, ndev); + + db = netdev_priv(ndev); + + db->msg_enable = 0; + db->spidev = spi; + db->ndev = ndev; + + ndev->netdev_ops = &dm9051_netdev_ops; + ndev->ethtool_ops = &dm9051_ethtool_ops; + + mutex_init(&db->spi_lockm); + mutex_init(&db->reg_mutex); + + INIT_WORK(&db->rxctrl_work, dm9051_rxctl_delay); + INIT_WORK(&db->tx_work, dm9051_tx_delay); + + ret = dm9051_map_init(spi, db); + if (ret) + return ret; + + ret = dm9051_map_chipid(db); + if (ret) + return ret; + + ret = dm9051_map_etherdev_par(ndev, db); + if (ret < 0) + return ret; + + ret = dm9051_mdio_register(db); + if (ret) + return ret; + + ret = dm9051_phy_connect(db); + if (ret) + return ret; + + dm9051_operation_clear(db); + skb_queue_head_init(&db->txq); + + ret = devm_register_netdev(dev, ndev); + if (ret) { + phy_disconnect(db->phydev); + return dev_err_probe(dev, ret, "device register failed"); + } + + return 0; +} + +static void dm9051_drv_remove(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct net_device *ndev = dev_get_drvdata(dev); + struct board_info *db = to_dm9051_board(ndev); + + phy_disconnect(db->phydev); +} + +static const struct of_device_id dm9051_match_table[] = { + { .compatible = "davicom,dm9051" }, + {} +}; + +static const struct spi_device_id dm9051_id_table[] = { + { "dm9051", 0 }, + {} +}; + +static struct spi_driver dm9051_driver = { + .driver = { + .name = DRVNAME_9051, + .of_match_table = dm9051_match_table, + }, + .probe = dm9051_probe, + .remove = dm9051_drv_remove, + .id_table = dm9051_id_table, +}; +module_spi_driver(dm9051_driver); + +MODULE_AUTHOR("Joseph CHANG <joseph_chang@davicom.com.tw>"); +MODULE_DESCRIPTION("Davicom DM9051 network SPI driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/net/ethernet/davicom/dm9051.h b/drivers/net/ethernet/davicom/dm9051.h new file mode 100644 index 000000000000..fef3120edd7c --- /dev/null +++ b/drivers/net/ethernet/davicom/dm9051.h @@ -0,0 +1,162 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2022 Davicom Semiconductor,Inc. + * Davicom DM9051 SPI Fast Ethernet Linux driver + */ + +#ifndef _DM9051_H_ +#define _DM9051_H_ + +#include <linux/bits.h> +#include <linux/netdevice.h> +#include <linux/types.h> + +#define DM9051_ID 0x9051 + +#define DM9051_NCR 0x00 +#define DM9051_NSR 0x01 +#define DM9051_TCR 0x02 +#define DM9051_RCR 0x05 +#define DM9051_BPTR 0x08 +#define DM9051_FCR 0x0A +#define DM9051_EPCR 0x0B +#define DM9051_EPAR 0x0C +#define DM9051_EPDRL 0x0D +#define DM9051_EPDRH 0x0E +#define DM9051_PAR 0x10 +#define DM9051_MAR 0x16 +#define DM9051_GPCR 0x1E +#define DM9051_GPR 0x1F + +#define DM9051_VIDL 0x28 +#define DM9051_VIDH 0x29 +#define DM9051_PIDL 0x2A +#define DM9051_PIDH 0x2B +#define DM9051_SMCR 0x2F +#define DM9051_ATCR 0x30 +#define DM9051_SPIBCR 0x38 +#define DM9051_INTCR 0x39 +#define DM9051_PPCR 0x3D + +#define DM9051_MPCR 0x55 +#define DM9051_LMCR 0x57 +#define DM9051_MBNDRY 0x5E + +#define DM9051_MRRL 0x74 +#define DM9051_MRRH 0x75 +#define DM9051_MWRL 0x7A +#define DM9051_MWRH 0x7B +#define DM9051_TXPLL 0x7C +#define DM9051_TXPLH 0x7D +#define DM9051_ISR 0x7E +#define DM9051_IMR 0x7F + +#define DM_SPI_MRCMDX 0x70 +#define DM_SPI_MRCMD 0x72 +#define DM_SPI_MWCMD 0x78 + +#define DM_SPI_WR 0x80 + +/* dm9051 Ethernet controller registers bits + */ +/* 0x00 */ +#define NCR_WAKEEN BIT(6) +#define NCR_FDX BIT(3) +#define NCR_RST BIT(0) +/* 0x01 */ +#define NSR_SPEED BIT(7) +#define NSR_LINKST BIT(6) +#define NSR_WAKEST BIT(5) +#define NSR_TX2END BIT(3) +#define NSR_TX1END BIT(2) +/* 0x02 */ +#define TCR_DIS_JABBER_TIMER BIT(6) /* for Jabber Packet support */ +#define TCR_TXREQ BIT(0) +/* 0x05 */ +#define RCR_DIS_WATCHDOG_TIMER BIT(6) /* for Jabber Packet support */ +#define RCR_DIS_LONG BIT(5) +#define RCR_DIS_CRC BIT(4) +#define RCR_ALL BIT(3) +#define RCR_PRMSC BIT(1) +#define RCR_RXEN BIT(0) +#define RCR_RX_DISABLE (RCR_DIS_LONG | RCR_DIS_CRC) +/* 0x06 */ +#define RSR_RF BIT(7) +#define RSR_MF BIT(6) +#define RSR_LCS BIT(5) +#define RSR_RWTO BIT(4) +#define RSR_PLE BIT(3) +#define RSR_AE BIT(2) +#define RSR_CE BIT(1) +#define RSR_FOE BIT(0) +#define RSR_ERR_BITS (RSR_RF | RSR_LCS | RSR_RWTO | RSR_PLE | \ + RSR_AE | RSR_CE | RSR_FOE) +/* 0x0A */ +#define FCR_TXPEN BIT(5) +#define FCR_BKPM BIT(3) +#define FCR_FLCE BIT(0) +#define FCR_RXTX_BITS (FCR_TXPEN | FCR_BKPM | FCR_FLCE) +/* 0x0B */ +#define EPCR_WEP BIT(4) +#define EPCR_EPOS BIT(3) +#define EPCR_ERPRR BIT(2) +#define EPCR_ERPRW BIT(1) +#define EPCR_ERRE BIT(0) +/* 0x1E */ +#define GPCR_GEP_CNTL BIT(0) +/* 0x1F */ +#define GPR_PHY_OFF BIT(0) +/* 0x30 */ +#define ATCR_AUTO_TX BIT(7) +/* 0x39 */ +#define INTCR_POL_LOW (1 << 0) +#define INTCR_POL_HIGH (0 << 0) +/* 0x3D */ +/* Pause Packet Control Register - default = 1 */ +#define PPCR_PAUSE_COUNT 0x08 +/* 0x55 */ +#define MPCR_RSTTX BIT(1) +#define MPCR_RSTRX BIT(0) +/* 0x57 */ +/* LEDMode Control Register - LEDMode1 */ +/* Value 0x81 : bit[7] = 1, bit[2] = 0, bit[1:0] = 01b */ +#define LMCR_NEWMOD BIT(7) +#define LMCR_TYPED1 BIT(1) +#define LMCR_TYPED0 BIT(0) +#define LMCR_MODE1 (LMCR_NEWMOD | LMCR_TYPED0) +/* 0x5E */ +#define MBNDRY_BYTE BIT(7) +/* 0xFE */ +#define ISR_MBS BIT(7) +#define ISR_LNKCHG BIT(5) +#define ISR_ROOS BIT(3) +#define ISR_ROS BIT(2) +#define ISR_PTS BIT(1) +#define ISR_PRS BIT(0) +#define ISR_CLR_INT (ISR_LNKCHG | ISR_ROOS | ISR_ROS | \ + ISR_PTS | ISR_PRS) +#define ISR_STOP_MRCMD (ISR_MBS) +/* 0xFF */ +#define IMR_PAR BIT(7) +#define IMR_LNKCHGI BIT(5) +#define IMR_PTM BIT(1) +#define IMR_PRM BIT(0) + +/* Const + */ +#define DM9051_PHY_ADDR 1 /* PHY id */ +#define DM9051_PHY 0x40 /* PHY address 0x01 */ +#define DM9051_PKT_RDY 0x01 /* Packet ready to receive */ +#define DM9051_PKT_MAX 1536 /* Received packet max size */ +#define DM9051_TX_QUE_HI_WATER 50 +#define DM9051_TX_QUE_LO_WATER 25 +#define DM_EEPROM_MAGIC 0x9051 + +#define DM_RXHDR_SIZE sizeof(struct dm9051_rxhdr) + +static inline struct board_info *to_dm9051_board(struct net_device *ndev) +{ + return netdev_priv(ndev); +} + +#endif /* _DM9051_H_ */ |