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Subject[PATCH v6, 2/2] net: Add dm9051 driver
Date
Add davicom dm9051 spi ethernet driver, The driver work with the
device platform's spi master

remove the redundant code that phylib has support,
adjust to be the reasonable sequence,
fine tune comments, add comments for pause function support

Tested with raspberry pi 4. Test for netwroking function, CAT5
cable unplug/plug and also ethtool detect for link state, and
all are ok.

Signed-off-by: Joseph CHAMG <josright123@gmail.com>
---
drivers/net/ethernet/davicom/Kconfig | 30 +
drivers/net/ethernet/davicom/Makefile | 1 +
drivers/net/ethernet/davicom/dm9051.c | 898 ++++++++++++++++++++++++++
drivers/net/ethernet/davicom/dm9051.h | 188 ++++++
4 files changed, 1117 insertions(+)
create mode 100644 drivers/net/ethernet/davicom/dm9051.c
create mode 100644 drivers/net/ethernet/davicom/dm9051.h

diff --git a/drivers/net/ethernet/davicom/Kconfig b/drivers/net/ethernet/davicom/Kconfig
index 7af86b6d4150..cc8cee5b993d 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 +35,20 @@ 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"
+ select PHYLIB
+ depends on SPI
+ select CRC32
+ select MII
+ 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..6cbbf290c1e7
--- /dev/null
+++ b/drivers/net/ethernet/davicom/dm9051.c
@@ -0,0 +1,898 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2021 Davicom Semiconductor,Inc.
+ * Davicom DM9051 SPI Fast Ethernet Linux driver
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/interrupt.h>
+#include <linux/phy.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/cache.h>
+#include <linux/crc32.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/iopoll.h>
+#include <linux/of_gpio.h>
+#include <linux/spi/spi.h>
+
+#include "dm9051.h"
+
+/* spi low level code */
+static int
+dm9051_xfer(struct board_info *db, u8 cmdphase, u8 *txb, u8 *rxb, unsigned int len)
+{
+ struct device *dev = &db->spidev->dev;
+ int ret = 0;
+
+ db->cmd[0] = cmdphase;
+ db->spi_xfer2[0].tx_buf = &db->cmd[0];
+ db->spi_xfer2[0].rx_buf = NULL;
+ db->spi_xfer2[0].len = 1;
+ if (!rxb) {
+ db->spi_xfer2[1].tx_buf = txb;
+ db->spi_xfer2[1].rx_buf = NULL;
+ db->spi_xfer2[1].len = len;
+ } else {
+ db->spi_xfer2[1].tx_buf = txb;
+ db->spi_xfer2[1].rx_buf = rxb;
+ db->spi_xfer2[1].len = len;
+ }
+ ret = spi_sync(db->spidev, &db->spi_msg2);
+ if (ret < 0)
+ dev_err(dev, "dm9Err spi burst cmd 0x%02x, ret=%d\n", cmdphase, ret);
+ return ret;
+}
+
+static u8 dm9051_ior(struct board_info *db, unsigned int reg)
+{
+ u8 rxb[1];
+
+ dm9051_xfer(db, DM_SPI_RD | reg, NULL, rxb, 1);
+ return rxb[0];
+}
+
+static void dm9051_iow(struct board_info *db, unsigned int reg, unsigned int val)
+{
+ u8 txb[1];
+
+ txb[0] = val;
+ dm9051_xfer(db, DM_SPI_WR | reg, txb, NULL, 1);
+}
+
+static void dm9051_inblk(struct board_info *db, u8 *buff, unsigned int len)
+{
+ u8 txb[1];
+
+ dm9051_xfer(db, DM_SPI_RD | DM_SPI_MRCMD, txb, buff, len);
+}
+
+static int dm9051_outblk(struct board_info *db, u8 *buff, unsigned int len)
+{
+ dm9051_xfer(db, DM_SPI_WR | DM_SPI_MWCMD, buff, NULL, len);
+ return 0;
+}
+
+/* basic read/write to phy
+ */
+static int dm_phy_read(struct board_info *db, int reg)
+{
+ int ret;
+ u8 check_val;
+
+ dm9051_iow(db, DM9051_EPAR, DM9051_PHY | reg);
+ dm9051_iow(db, DM9051_EPCR, EPCR_ERPRR | EPCR_EPOS);
+ ret = read_poll_timeout(dm9051_ior, check_val, !(check_val & EPCR_ERRE), 100, 10000,
+ true, db, DM9051_EPCR);
+ dm9051_iow(db, DM9051_EPCR, 0x0);
+ if (ret) {
+ netdev_err(db->ndev, "timeout read phy register\n");
+ return DM9051_PHY_NULLVALUE;
+ }
+ ret = (dm9051_ior(db, DM9051_EPDRH) << 8) | dm9051_ior(db, DM9051_EPDRL);
+ return ret;
+}
+
+static void dm_phy_write(struct board_info *db, int reg, int value)
+{
+ int ret;
+ u8 check_val;
+
+ dm9051_iow(db, DM9051_EPAR, DM9051_PHY | reg);
+ dm9051_iow(db, DM9051_EPDRL, value);
+ dm9051_iow(db, DM9051_EPDRH, value >> 8);
+ dm9051_iow(db, DM9051_EPCR, EPCR_EPOS | EPCR_ERPRW);
+ ret = read_poll_timeout(dm9051_ior, check_val, !(check_val & EPCR_ERRE), 100, 10000,
+ true, db, DM9051_EPCR);
+ dm9051_iow(db, DM9051_EPCR, 0x0);
+ if (ret)
+ netdev_err(db->ndev, "timeout write phy register\n");
+}
+
+/* Read a word data from SROM
+ */
+static void dm_read_eeprom(struct board_info *db, int offset, u8 *to)
+{
+ int ret;
+ u8 check_val;
+
+ mutex_lock(&db->addr_lock);
+ dm9051_iow(db, DM9051_EPAR, offset);
+ dm9051_iow(db, DM9051_EPCR, EPCR_ERPRR);
+ ret = read_poll_timeout(dm9051_ior, check_val, !(check_val & EPCR_ERRE), 100, 10000,
+ true, db, DM9051_EPCR);
+ dm9051_iow(db, DM9051_EPCR, 0x0);
+ if (!ret) {
+ to[0] = dm9051_ior(db, DM9051_EPDRL);
+ to[1] = dm9051_ior(db, DM9051_EPDRH);
+ } else {
+ to[0] = DM9051_EEPROM_NULLVALUE & 0xff;
+ to[1] = DM9051_EEPROM_NULLVALUE >> 8;
+ netdev_err(db->ndev, "timeout read eeprom\n");
+ }
+ mutex_unlock(&db->addr_lock);
+}
+
+/* Write a word data to SROM
+ */
+static void dm_write_eeprom(struct board_info *db, int offset, u8 *data)
+{
+ int ret;
+ u8 check_val;
+
+ mutex_lock(&db->addr_lock);
+ dm9051_iow(db, DM9051_EPAR, offset);
+ dm9051_iow(db, DM9051_EPDRH, data[1]);
+ dm9051_iow(db, DM9051_EPDRL, data[0]);
+ dm9051_iow(db, DM9051_EPCR, EPCR_WEP | EPCR_ERPRW);
+ ret = read_poll_timeout(dm9051_ior, check_val, !(check_val & EPCR_ERRE), 100, 10000,
+ true, db, DM9051_EPCR);
+ dm9051_iow(db, DM9051_EPCR, 0);
+ if (ret)
+ netdev_err(db->ndev, "timeout write eeprom\n");
+ mutex_unlock(&db->addr_lock);
+}
+
+static int dm9051_mdio_read(struct mii_bus *mdiobus, int phy_id, int reg)
+{
+ struct board_info *db = mdiobus->priv;
+ int val;
+
+ if (phy_id == DM9051_PHY_ID) {
+ mutex_lock(&db->addr_lock);
+ val = dm_phy_read(db, reg);
+ mutex_unlock(&db->addr_lock);
+ return val;
+ }
+
+ return DM9051_PHY_NULLVALUE;
+}
+
+static int dm9051_mdio_write(struct mii_bus *mdiobus, int phy_id, int reg, u16 val)
+{
+ struct board_info *db = mdiobus->priv;
+
+ if (phy_id == DM9051_PHY_ID) {
+ mutex_lock(&db->addr_lock);
+ dm_phy_write(db, reg, val);
+ mutex_unlock(&db->addr_lock);
+ return 0;
+ }
+
+ return -ENODEV;
+}
+
+/* read chip id
+ */
+static unsigned int dm9051_chipid(struct board_info *db)
+{
+ struct device *dev = &db->spidev->dev;
+ unsigned int id;
+
+ id = (unsigned int)dm9051_ior(db, DM9051_PIDH) << 8;
+ id |= dm9051_ior(db, DM9051_PIDL);
+ if (id == DM9051_ID) {
+ dev_info(dev, "dm9051 id [%04x]\n", id);
+ return id;
+ }
+
+ dev_info(dev, "dm9051 id error [error as %04x]\n", id);
+ return id;
+}
+
+static void dm9051_reset(struct board_info *db)
+{
+ mdelay(2); /* need before NCR_RST */
+ dm9051_iow(db, DM9051_NCR, NCR_RST); /* NCR reset */
+ mdelay(1);
+ dm9051_iow(db, DM9051_MBNDRY, MBNDRY_BYTE); /* MemBound */
+ mdelay(1);
+}
+
+static void dm9051_fifo_reset(struct board_info *db)
+{
+ db->bc.DO_FIFO_RST_counter++;
+
+ dm9051_iow(db, DM9051_FCR, FCR_FLOW_ENABLE); /* FlowCtrl */
+ dm9051_iow(db, DM9051_PPCR, PPCR_PAUSE_COUNT); /* Pause Pkt Count */
+ dm9051_iow(db, DM9051_LMCR, db->lcr_all); /* LEDMode1 */
+ dm9051_iow(db, DM9051_INTCR, INTCR_POL_LOW); /* INTCR */
+}
+
+/* ESSENTIAL, ensure rxFifoPoint control, disable/enable the interrupt mask
+ */
+static void dm_imr_disable_lock_essential(struct board_info *db)
+{
+ mutex_lock(&db->addr_lock);
+ dm9051_iow(db, DM9051_IMR, IMR_PAR); /* Disabe All */
+ mutex_unlock(&db->addr_lock);
+}
+
+static void dm_imr_enable_lock_essential(struct board_info *db)
+{
+ mutex_lock(&db->addr_lock);
+ dm9051_iow(db, DM9051_IMR, db->imr_all); /* rxp to 0xc00 */
+ mutex_unlock(&db->addr_lock);
+}
+
+/* functions process mac address is major from EEPROM
+ */
+static void dm_mac_addr_set(struct net_device *ndev, struct board_info *db)
+{
+ u8 addr[ETH_ALEN];
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ addr[i] = dm9051_ior(db, DM9051_PAR + i);
+
+ if (is_valid_ether_addr(addr)) {
+ eth_hw_addr_set(ndev, addr);
+ return;
+ }
+
+ eth_hw_addr_random(ndev);
+ dev_dbg(&db->spidev->dev, "Use random MAC address\n");
+}
+
+/* set mac permanently
+ */
+static void dm_set_mac_lock(struct board_info *db)
+{
+ struct net_device *ndev = db->ndev;
+ int i, oft;
+
+ netdev_dbg(ndev, "set_mac_address %pM\n", ndev->dev_addr);
+
+ /* write to net device and chip */
+ mutex_lock(&db->addr_lock);
+ for (i = 0, oft = DM9051_PAR; i < ETH_ALEN; i++, oft++)
+ dm9051_iow(db, oft, ndev->dev_addr[i]);
+ mutex_unlock(&db->addr_lock);
+
+ /* write to EEPROM */
+ for (i = 0; i < ETH_ALEN; i += 2)
+ dm_write_eeprom(db, i / 2, (u8 *)&ndev->dev_addr[i]);
+}
+
+/* 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 *dev, u32 value)
+{
+ struct board_info *dm = to_dm9051_board(dev);
+
+ dm->msg_enable = value;
+}
+
+static u32 dm9051_get_msglevel(struct net_device *dev)
+{
+ struct board_info *dm = to_dm9051_board(dev);
+
+ return dm->msg_enable;
+}
+
+static int dm9051_get_eeprom_len(struct net_device *dev)
+{
+ return 128;
+}
+
+static int dm9051_get_eeprom(struct net_device *dev,
+ struct ethtool_eeprom *ee, u8 *data)
+{
+ struct board_info *dm = to_dm9051_board(dev);
+ int offset = ee->offset;
+ int len = ee->len;
+ int i;
+
+ if ((len & 1) != 0 || (offset & 1) != 0)
+ return -EINVAL;
+
+ ee->magic = DM_EEPROM_MAGIC;
+
+ for (i = 0; i < len; i += 2)
+ dm_read_eeprom(dm, (offset + i) / 2, data + i);
+ return 0;
+}
+
+static int dm9051_set_eeprom(struct net_device *dev,
+ struct ethtool_eeprom *ee, u8 *data)
+{
+ struct board_info *dm = to_dm9051_board(dev);
+ int offset = ee->offset;
+ int len = ee->len;
+ int i;
+
+ if ((len & 1) != 0 || (offset & 1) != 0)
+ return -EINVAL;
+
+ if (ee->magic != DM_EEPROM_MAGIC)
+ return -EINVAL;
+
+ for (i = 0; i < len; i += 2)
+ dm_write_eeprom(dm, (offset + i) / 2, data + i);
+ return 0;
+}
+
+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,
+};
+
+static void dm_operation_clear(struct board_info *db)
+{
+ db->bc.mac_ovrsft_counter = 0;
+ db->bc.large_err_counter = 0;
+ db->bc.DO_FIFO_RST_counter = 0;
+}
+
+/* reset and increase the RST counter
+ */
+static void dm9051_chip_reset(struct board_info *db)
+{
+ dm9051_reset(db);
+ dm9051_fifo_reset(db);
+}
+
+static void dm9051_reset_dm9051(struct board_info *db)
+{
+ struct net_device *ndev = db->ndev;
+ char *sbuff = (char *)db->prxhdr;
+ int rxlen = db->prxhdr->rxlen;
+
+ netdev_dbg(ndev, "dm9-rxhdr, Large-eror (rxhdr %02x %02x %02x %02x)\n",
+ sbuff[0], sbuff[1], sbuff[2], sbuff[3]);
+ netdev_dbg(ndev, "dm9-pkt-Wrong, RxLen over-range (%x= %d > %x= %d)\n",
+ rxlen, rxlen, DM9051_PKT_MAX, DM9051_PKT_MAX);
+
+ db->bc.large_err_counter++;
+ dm9051_chip_reset(db);
+
+ netdev_dbg(ndev, " RxLenErr&MacOvrSft_Er %d, RST_c %d\n",
+ db->bc.large_err_counter + db->bc.mac_ovrsft_counter,
+ db->bc.DO_FIFO_RST_counter);
+}
+
+static int dm9051_loop_rx(struct board_info *db)
+{
+ struct net_device *ndev = db->ndev;
+ u8 rxbyte;
+ int rxlen;
+ char sbuff[DM_RXHDR_SIZE];
+ struct sk_buff *skb;
+ u8 *rdptr;
+ int scanrr = 0;
+
+ while (1) {
+ rxbyte = dm9051_ior(db, DM_SPI_MRCMDX); /* Dummy read */
+ rxbyte = dm9051_ior(db, DM_SPI_MRCMDX); /* Dummy read */
+ if (rxbyte != DM9051_PKT_RDY) {
+ dm9051_iow(db, DM9051_ISR, 0xff); /* Clear ISR, clear to stop mrcmd */
+ break; /* exhaust-empty */
+ }
+ dm9051_inblk(db, sbuff, DM_RXHDR_SIZE);
+ dm9051_iow(db, DM9051_ISR, 0xff); /* Clear ISR, clear to stop mrcmd */
+
+ db->prxhdr = (struct dm9051_rxhdr *)sbuff;
+ if (db->prxhdr->rxstatus & 0xbf) {
+ netdev_dbg(ndev, "warn : rxhdr.status 0x%02x\n",
+ db->prxhdr->rxstatus);
+ }
+ if (db->prxhdr->rxlen > DM9051_PKT_MAX) {
+ dm9051_reset_dm9051(db);
+ return scanrr;
+ }
+
+ rxlen = db->prxhdr->rxlen;
+ skb = dev_alloc_skb(rxlen + 4);
+ if (!skb) {
+ netdev_dbg(ndev, "alloc skb size %d fail\n", rxlen + 4);
+ return scanrr;
+ }
+ skb_reserve(skb, 2);
+ rdptr = (u8 *)skb_put(skb, rxlen - 4);
+
+ dm9051_inblk(db, rdptr, rxlen);
+ dm9051_iow(db, DM9051_ISR, 0xff); /* Clear ISR, clear to stop mrcmd */
+
+ skb->protocol = eth_type_trans(skb, db->ndev);
+ if (db->ndev->features & NETIF_F_RXCSUM)
+ skb_checksum_none_assert(skb);
+ if (in_interrupt())
+ netif_rx(skb);
+ else
+ netif_rx_ni(skb);
+ db->ndev->stats.rx_bytes += rxlen;
+ db->ndev->stats.rx_packets++;
+ scanrr++;
+ }
+ return scanrr;
+}
+
+static int dm9051_single_tx(struct board_info *db, u8 *buff, unsigned int len)
+{
+ int ret;
+ u8 check_val;
+
+ /* shorter by waiting tx-end rather than tx-req */
+ ret = read_poll_timeout(dm9051_ior, check_val, check_val & (NSR_TX2END | NSR_TX1END),
+ 1, 20, false, db, DM9051_NSR);
+ if (ret) {
+ netdev_err(db->ndev, "timeout transmit packet\n");
+ return ret;
+ }
+ dm9051_outblk(db, buff, len);
+ dm9051_iow(db, DM9051_TXPLL, len);
+ dm9051_iow(db, DM9051_TXPLH, len >> 8);
+ dm9051_iow(db, DM9051_TCR, TCR_TXREQ);
+ return 0;
+}
+
+static int dm9051_send(struct board_info *db)
+{
+ struct net_device *ndev = db->ndev;
+ int ntx = 0;
+
+ while (!skb_queue_empty(&db->txq)) {
+ struct sk_buff *skb;
+
+ skb = skb_dequeue(&db->txq);
+ if (skb) {
+ ntx++;
+ dm9051_single_tx(db, skb->data, skb->len);
+ ndev->stats.tx_bytes += skb->len;
+ ndev->stats.tx_packets++;
+ dev_kfree_skb(skb);
+ }
+ }
+ return ntx;
+}
+
+/* end with enable the interrupt mask
+ */
+static irqreturn_t dm9051_rx_threaded_irq(int irq, void *pw)
+{
+ struct board_info *db = pw;
+ int nrx;
+
+ mutex_lock(&db->spi_lock); /* mutex essential */
+ dm_imr_disable_lock_essential(db); /* set imr disable */
+ if (netif_carrier_ok(db->ndev)) {
+ mutex_lock(&db->addr_lock);
+ do {
+ nrx = dm9051_loop_rx(db);
+ dm9051_send(db); /* for more performance */
+ } while (nrx);
+ mutex_unlock(&db->addr_lock);
+ }
+ dm_imr_enable_lock_essential(db); /* set imr enable */
+ mutex_unlock(&db->spi_lock); /* mutex essential */
+ return IRQ_HANDLED;
+}
+
+/* end with enable the interrupt mask
+ */
+static int dm_opencode_receiving(struct net_device *ndev, struct board_info *db)
+{
+ int ret;
+ struct spi_device *spi = db->spidev;
+
+ ndev->irq = spi->irq; /* by dts */
+ ret = request_threaded_irq(spi->irq, NULL, dm9051_rx_threaded_irq,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ ndev->name, db);
+ if (ret < 0) {
+ netdev_err(ndev, "failed to get irq\n");
+ return ret;
+ }
+
+ dm_imr_enable_lock_essential(db);
+ return 0;
+}
+
+static void int_tx_delay(struct work_struct *w)
+{
+ struct delayed_work *dw = to_delayed_work(w);
+ struct board_info *db = container_of(dw, struct board_info, tx_work);
+
+ mutex_lock(&db->spi_lock); /* mutex essential */
+ mutex_lock(&db->addr_lock);
+ dm9051_send(db);
+ mutex_unlock(&db->addr_lock);
+ mutex_unlock(&db->spi_lock); /* mutex essential */
+}
+
+static void int_rxctl_delay(struct work_struct *w)
+{
+ struct delayed_work *dw = to_delayed_work(w);
+ struct board_info *db = container_of(dw, struct board_info, rxctrl_work);
+ struct net_device *ndev = db->ndev;
+ int i, oft;
+
+ mutex_lock(&db->addr_lock);
+
+ for (i = 0, oft = DM9051_PAR; i < ETH_ALEN; i++, oft++)
+ dm9051_iow(db, oft, ndev->dev_addr[i]);
+
+ /* Write the hash table */
+ for (i = 0, oft = DM9051_MAR; i < 4; i++) {
+ dm9051_iow(db, oft++, db->hash_table[i]);
+ dm9051_iow(db, oft++, db->hash_table[i] >> 8);
+ }
+
+ dm9051_iow(db, DM9051_RCR, db->rcr_all); /* EnabRX all */
+
+ mutex_unlock(&db->addr_lock);
+}
+
+/* Irq free and schedule delays cancel
+ */
+static void dm_stopcode_release(struct board_info *db)
+{
+ free_irq(db->spidev->irq, db);
+ cancel_delayed_work_sync(&db->rxctrl_work);
+ cancel_delayed_work_sync(&db->tx_work);
+}
+
+static void dm_control_init(struct board_info *db)
+{
+ mutex_init(&db->spi_lock);
+ mutex_init(&db->addr_lock);
+ INIT_DELAYED_WORK(&db->rxctrl_work, int_rxctl_delay);
+ INIT_DELAYED_WORK(&db->tx_work, int_tx_delay);
+}
+
+static void dm9051_init_dm9051(struct board_info *db)
+{
+ db->imr_all = IMR_PAR | IMR_PRM;
+ db->rcr_all = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
+ db->lcr_all = LMCR_MODE1;
+
+ dm9051_chip_reset(db);
+}
+
+static void dm_opencode_lock(struct net_device *dev, struct board_info *db)
+{
+ mutex_lock(&db->addr_lock); /* Note: must */
+
+ dm9051_iow(db, DM9051_GPR, 0); /* REG_1F bit0 activate phyxcer */
+ mdelay(1); /* delay needs for activate phyxcer */
+
+ dm9051_init_dm9051(db);
+
+ dm9051_iow(db, DM9051_IMR, IMR_PAR); /* Disabe All */
+
+ mutex_unlock(&db->addr_lock);
+}
+
+static void dm_stopcode_lock(struct board_info *db)
+{
+ mutex_lock(&db->addr_lock);
+
+ dm9051_iow(db, DM9051_GPR, 0x01); /* Power-Down PHY */
+ dm9051_iow(db, DM9051_RCR, RCR_RX_DISABLE); /* Disable RX */
+
+ mutex_unlock(&db->addr_lock);
+}
+
+/* handle link change
+ */
+static void dm_handle_link_change(struct net_device *ndev)
+{
+ /* MAC and phy are integrated together, such as link state, speed,
+ * and Duplex are sync inside
+ */
+ phy_print_status(ndev->phydev);
+}
+
+static int dm_phy_connect(struct board_info *db)
+{
+ char phy_id[MII_BUS_ID_SIZE + 3];
+
+ snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT,
+ db->mdiobus->id, DM9051_PHY_ID);
+ db->phydev = phy_connect(db->ndev, phy_id, dm_handle_link_change,
+ PHY_INTERFACE_MODE_MII);
+
+ if (IS_ERR(db->phydev))
+ return PTR_ERR(db->phydev);
+
+ return 0;
+}
+
+static void dm_phy_start(struct board_info *db)
+{
+ /* coresspond to support pause with mac, also configure phy advertised pause support */
+ phy_set_asym_pause(db->phydev, true, true);
+ phy_start(db->phydev);
+}
+
+/* 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 = netdev_priv(ndev);
+ int ret;
+
+ dm_opencode_lock(ndev, db);
+
+ skb_queue_head_init(&db->txq);
+ netif_start_queue(ndev);
+ netif_wake_queue(ndev);
+
+ ret = dm_opencode_receiving(ndev, db);
+ if (ret < 0)
+ return ret;
+
+ dm_phy_start(db);
+ netdev_dbg(ndev, "[dm_open] %pM irq_no %d ACTIVE_LOW\n", ndev->dev_addr, ndev->irq);
+ return 0;
+}
+
+/* Close network device
+ * Called to close down a network device which has been active. Cancell 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 = netdev_priv(ndev);
+
+ phy_stop(db->phydev);
+ dm_stopcode_release(db);
+ netif_stop_queue(ndev);
+ dm_stopcode_lock(db);
+ return 0;
+}
+
+/* event: play a schedule starter in condition
+ */
+static netdev_tx_t dm9051_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct board_info *db = netdev_priv(dev);
+
+ skb_queue_tail(&db->txq, skb); /* add to skb */
+ schedule_delayed_work(&db->tx_work, 0);
+ return NETDEV_TX_OK;
+}
+
+/* event: play with a schedule starter
+ */
+static void dm9051_set_multicast_list_schedule(struct net_device *ndev)
+{
+ struct board_info *db = netdev_priv(ndev);
+ u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
+ struct netdev_hw_addr *ha;
+ u32 hash_val;
+
+ /* 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);
+ }
+
+ db->rcr_all = rcr;
+
+ /* broadcast address */
+ db->hash_table[0] = 0;
+ db->hash_table[1] = 0;
+ db->hash_table[2] = 0;
+ db->hash_table[3] = 0x8000;
+
+ /* the multicast address in Hash Table : 64 bits */
+ netdev_for_each_mc_addr(ha, ndev) {
+ hash_val = ether_crc_le(6, ha->addr) & 0x3f;
+ db->hash_table[hash_val / 16] |= (u16)1 << (hash_val % 16);
+ }
+
+ schedule_delayed_work(&db->rxctrl_work, 0);
+}
+
+/* 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 = netdev_priv(ndev);
+ int ret = eth_mac_addr(ndev, p);
+
+ if (ret < 0)
+ return ret;
+
+ dm_set_mac_lock(db);
+ return 0;
+}
+
+/* netdev-ops
+ */
+static const struct of_device_id dm9051_match_table[] = {
+ { .compatible = "davicom,dm9051", },
+ {},
+};
+
+static const struct spi_device_id dm9051_id_table[] = {
+ { "dm9051", 0 },
+ {},
+};
+
+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_multicast_list_schedule,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = dm9051_set_mac_address,
+};
+
+/* probe subs
+ */
+static void dm_netdev(struct net_device *ndev)
+{
+ ndev->mtu = 1500;
+ ndev->if_port = IF_PORT_100BASET;
+ ndev->netdev_ops = &dm9051_netdev_ops;
+ ndev->ethtool_ops = &dm9051_ethtool_ops;
+}
+
+static void dm_spimsg_addtail(struct board_info *db)
+{
+ memset(&db->spi_xfer2, 0, sizeof(struct spi_transfer) * 2);
+ spi_message_init(&db->spi_msg2);
+ spi_message_add_tail(&db->spi_xfer2[0], &db->spi_msg2);
+ spi_message_add_tail(&db->spi_xfer2[1], &db->spi_msg2);
+}
+
+static int dm_register_mdiobus(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 < 0) {
+ dev_err(&spi->dev, "Could not register MDIO bus\n");
+ return ret;
+ }
+ return 0;
+}
+
+static int dm9051_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct net_device *ndev;
+ struct board_info *db;
+ unsigned int id;
+ int ret = 0;
+
+ 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);
+ memset(db, 0, sizeof(struct board_info));
+ db->msg_enable = 0;
+ db->spidev = spi;
+ db->ndev = ndev;
+ dm_netdev(ndev);
+
+ dm_spimsg_addtail(db);
+ dm_control_init(db); /* init delayed works */
+
+ id = dm9051_chipid(db);
+ if (id != DM9051_ID) {
+ dev_err(dev, "chip id error\n");
+ return -ENODEV;
+ }
+ dm_mac_addr_set(ndev, db);
+
+ ret = dm_register_mdiobus(db); /* init mdiobus */
+ if (ret) {
+ dev_err(dev, "register mdiobus error\n");
+ return ret;
+ }
+
+ ret = dm_phy_connect(db); /* phy connect as poll mode */
+ if (ret) {
+ dev_err(dev, "phy connect error\n");
+ return ret;
+ }
+
+ dm_operation_clear(db);
+ ret = devm_register_netdev(dev, ndev);
+ if (ret) {
+ dev_err(dev, "failed to register network device\n");
+ goto err_netdev;
+ }
+
+ return 0;
+
+err_netdev:
+ phy_disconnect(db->phydev);
+ return ret;
+}
+
+static int dm9051_drv_remove(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct board_info *db = netdev_priv(ndev);
+
+ phy_disconnect(db->phydev);
+ return 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..1d1db454931a
--- /dev/null
+++ b/drivers/net/ethernet/davicom/dm9051.h
@@ -0,0 +1,188 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2021 Davicom Semiconductor,Inc.
+ * Davicom DM9051 SPI Fast Ethernet Linux driver
+ */
+
+#ifndef _DM9051_H_
+#define _DM9051_H_
+
+#define DRVNAME_9051 "dm9051"
+
+#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_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_RD (0x00)
+#define DM_SPI_WR (0x80)
+
+/* dm9051 Ethernet
+ */
+/* 0x00 */
+#define NCR_WAKEEN BIT(6)
+#define NCR_FDX BIT(3)
+#define NCR_RST BIT(0)
+/* 0x02 */
+#define TCR_DIS_JABBER_TIMER BIT(6) /* for Jabber Packet support */
+#define TCR_TXREQ 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)
+/* 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)
+/* 0x0A */
+#define FCR_TXPEN BIT(5)
+#define FCR_BKPM BIT(3)
+#define FCR_FLCE BIT(0)
+#define FCR_FLOW_ENABLE (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)
+/* 0x30 */
+#define ATCR_AUTO_TX BIT(7)
+/* 0x39 */
+#define INTCR_POL_LOW BIT(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_ROOS BIT(3)
+#define ISR_ROS BIT(2)
+#define ISR_PTS BIT(1)
+#define ISR_PRS BIT(0)
+#define ISR_CLR_STATUS (ISR_ROOS | ISR_ROS | ISR_PTS | ISR_PRS)
+/* 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_ID 1 /* PHY id */
+#define DM9051_PHY 0x40 /* PHY address 0x01 */
+#define DM9051_PHY_NULLVALUE 0xffff /* PHY null value for read error */
+#define DM9051_PKT_RDY 0x01 /* Packet ready to receive */
+#define DM9051_PKT_MAX 1536 /* Received packet max size */
+#define DM_EEPROM_MAGIC (0x9051)
+#define DM9051_EEPROM_NULLVALUE 0xffff /* EEPROM null value for read error */
+
+static inline struct board_info *to_dm9051_board(struct net_device *dev)
+{
+ return netdev_priv(dev);
+}
+
+/* structure definitions
+ */
+struct rx_ctl_mach {
+ u16 large_err_counter; /* The error of 'Large Err' */
+ u16 mac_ovrsft_counter; /* The error of 'MacOvrSft_Er' */
+ u16 DO_FIFO_RST_counter; /* The counter of 'fifo_reset' */
+};
+
+struct dm9051_rxhdr {
+ u8 rxpktready;
+ u8 rxstatus;
+ __le16 rxlen;
+};
+
+struct board_info {
+ u8 cmd[2] ____cacheline_aligned;
+ struct spi_transfer spi_xfer2[2] ____cacheline_aligned;
+ struct spi_message spi_msg2 ____cacheline_aligned;
+ struct rx_ctl_mach bc ____cacheline_aligned;
+ struct dm9051_rxhdr *prxhdr ____cacheline_aligned;
+ struct spi_device *spidev;
+ struct net_device *ndev;
+ struct mii_bus *mdiobus;
+ struct phy_device *phydev;
+ struct sk_buff_head txq;
+ struct mutex spi_lock; /* delayed_work's lock */
+ struct mutex addr_lock; /* dm9051's REG lock */
+ struct delayed_work rxctrl_work;
+ struct delayed_work tx_work;
+ u16 hash_table[4];
+ u32 msg_enable ____cacheline_aligned;
+ u8 imr_all;
+ u8 rcr_all;
+ u8 lcr_all;
+};
+
+#define DM_RXHDR_SIZE sizeof(struct dm9051_rxhdr)
+
+#endif /* _DM9051_H_ */
--
2.20.1
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