Initial import

1 files changed, 1804 insertions, 0 deletions

diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c
new file mode 100644
index 000000000..c0a781360
--- /dev/null
+++ b/drivers/net/ethernet/davicom/dm9000.c
@@ -0,0 +1,1804 @@
+/*
+ *      Davicom DM9000 Fast Ethernet driver for Linux.
+ * 	Copyright (C) 1997  Sten Wang
+ *
+ * 	This program is free software; you can redistribute it and/or
+ * 	modify it under the terms of the GNU General Public License
+ * 	as published by the Free Software Foundation; either version 2
+ * 	of the License, or (at your option) any later version.
+ *
+ * 	This program is distributed in the hope that it will be useful,
+ * 	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * 	GNU General Public License for more details.
+ *
+ * (C) Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
+ *
+ * Additional updates, Copyright:
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	Sascha Hauer <s.hauer@pengutronix.de>
+ */
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/interrupt.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/crc32.h>
+#include <linux/mii.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
+#include <linux/ethtool.h>
+#include <linux/dm9000.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/regulator/consumer.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+
+#include <asm/delay.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include "dm9000.h"
+
+/* Board/System/Debug information/definition ---------------- */
+
+#define DM9000_PHY		0x40	/* PHY address 0x01 */
+
+#define CARDNAME	"dm9000"
+#define DRV_VERSION	"1.31"
+
+/*
+ * Transmit timeout, default 5 seconds.
+ */
+static int watchdog = 5000;
+module_param(watchdog, int, 0400);
+MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
+
+/*
+ * Debug messages level
+ */
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "dm9000 debug level (0-4)");
+
+/* DM9000 register address locking.
+ *
+ * The DM9000 uses an address register to control where data written
+ * to the data register goes. This means that the address register
+ * must be preserved over interrupts or similar calls.
+ *
+ * During interrupt and other critical calls, a spinlock is used to
+ * protect the system, but the calls themselves save the address
+ * in the address register in case they are interrupting another
+ * access to the device.
+ *
+ * For general accesses a lock is provided so that calls which are
+ * allowed to sleep are serialised so that the address register does
+ * not need to be saved. This lock also serves to serialise access
+ * to the EEPROM and PHY access registers which are shared between
+ * these two devices.
+ */
+
+/* The driver supports the original DM9000E, and now the two newer
+ * devices, DM9000A and DM9000B.
+ */
+
+enum dm9000_type {
+	TYPE_DM9000E,	/* original DM9000 */
+	TYPE_DM9000A,
+	TYPE_DM9000B
+};
+
+/* Structure/enum declaration ------------------------------- */
+struct board_info {
+
+	void __iomem	*io_addr;	/* Register I/O base address */
+	void __iomem	*io_data;	/* Data I/O address */
+	u16		 irq;		/* IRQ */
+
+	u16		tx_pkt_cnt;
+	u16		queue_pkt_len;
+	u16		queue_start_addr;
+	u16		queue_ip_summed;
+	u16		dbug_cnt;
+	u8		io_mode;		/* 0:word, 2:byte */
+	u8		phy_addr;
+	u8		imr_all;
+
+	unsigned int	flags;
+	unsigned int	in_timeout:1;
+	unsigned int	in_suspend:1;
+	unsigned int	wake_supported:1;
+
+	enum dm9000_type type;
+
+	void (*inblk)(void __iomem *port, void *data, int length);
+	void (*outblk)(void __iomem *port, void *data, int length);
+	void (*dumpblk)(void __iomem *port, int length);
+
+	struct device	*dev;	     /* parent device */
+
+	struct resource	*addr_res;   /* resources found */
+	struct resource *data_res;
+	struct resource	*addr_req;   /* resources requested */
+	struct resource *data_req;
+	struct resource *irq_res;
+
+	int		 irq_wake;
+
+	struct mutex	 addr_lock;	/* phy and eeprom access lock */
+
+	struct delayed_work phy_poll;
+	struct net_device  *ndev;
+
+	spinlock_t	lock;
+
+	struct mii_if_info mii;
+	u32		msg_enable;
+	u32		wake_state;
+
+	int		ip_summed;
+};
+
+/* debug code */
+
+#define dm9000_dbg(db, lev, msg...) do {		\
+	if ((lev) < debug) {				\
+		dev_dbg(db->dev, msg);			\
+	}						\
+} while (0)
+
+static inline struct board_info *to_dm9000_board(struct net_device *dev)
+{
+	return netdev_priv(dev);
+}
+
+/* DM9000 network board routine ---------------------------- */
+
+/*
+ *   Read a byte from I/O port
+ */
+static u8
+ior(struct board_info *db, int reg)
+{
+	writeb(reg, db->io_addr);
+	return readb(db->io_data);
+}
+
+/*
+ *   Write a byte to I/O port
+ */
+
+static void
+iow(struct board_info *db, int reg, int value)
+{
+	writeb(reg, db->io_addr);
+	writeb(value, db->io_data);
+}
+
+static void
+dm9000_reset(struct board_info *db)
+{
+	dev_dbg(db->dev, "resetting device\n");
+
+	/* Reset DM9000, see DM9000 Application Notes V1.22 Jun 11, 2004 page 29
+	 * The essential point is that we have to do a double reset, and the
+	 * instruction is to set LBK into MAC internal loopback mode.
+	 */
+	iow(db, DM9000_NCR, NCR_RST | NCR_MAC_LBK);
+	udelay(100); /* Application note says at least 20 us */
+	if (ior(db, DM9000_NCR) & 1)
+		dev_err(db->dev, "dm9000 did not respond to first reset\n");
+
+	iow(db, DM9000_NCR, 0);
+	iow(db, DM9000_NCR, NCR_RST | NCR_MAC_LBK);
+	udelay(100);
+	if (ior(db, DM9000_NCR) & 1)
+		dev_err(db->dev, "dm9000 did not respond to second reset\n");
+}
+
+/* routines for sending block to chip */
+
+static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
+{
+	iowrite8_rep(reg, data, count);
+}
+
+static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
+{
+	iowrite16_rep(reg, data, (count+1) >> 1);
+}
+
+static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
+{
+	iowrite32_rep(reg, data, (count+3) >> 2);
+}
+
+/* input block from chip to memory */
+
+static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
+{
+	ioread8_rep(reg, data, count);
+}
+
+
+static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
+{
+	ioread16_rep(reg, data, (count+1) >> 1);
+}
+
+static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
+{
+	ioread32_rep(reg, data, (count+3) >> 2);
+}
+
+/* dump block from chip to null */
+
+static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
+{
+	int i;
+	int tmp;
+
+	for (i = 0; i < count; i++)
+		tmp = readb(reg);
+}
+
+static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
+{
+	int i;
+	int tmp;
+
+	count = (count + 1) >> 1;
+
+	for (i = 0; i < count; i++)
+		tmp = readw(reg);
+}
+
+static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
+{
+	int i;
+	int tmp;
+
+	count = (count + 3) >> 2;
+
+	for (i = 0; i < count; i++)
+		tmp = readl(reg);
+}
+
+/*
+ * Sleep, either by using msleep() or if we are suspending, then
+ * use mdelay() to sleep.
+ */
+static void dm9000_msleep(struct board_info *db, unsigned int ms)
+{
+	if (db->in_suspend || db->in_timeout)
+		mdelay(ms);
+	else
+		msleep(ms);
+}
+
+/* Read a word from phyxcer */
+static int
+dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
+{
+	struct board_info *db = netdev_priv(dev);
+	unsigned long flags;
+	unsigned int reg_save;
+	int ret;
+
+	mutex_lock(&db->addr_lock);
+
+	spin_lock_irqsave(&db->lock, flags);
+
+	/* Save previous register address */
+	reg_save = readb(db->io_addr);
+
+	/* Fill the phyxcer register into REG_0C */
+	iow(db, DM9000_EPAR, DM9000_PHY | reg);
+
+	/* Issue phyxcer read command */
+	iow(db, DM9000_EPCR, EPCR_ERPRR | EPCR_EPOS);
+
+	writeb(reg_save, db->io_addr);
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	dm9000_msleep(db, 1);		/* Wait read complete */
+
+	spin_lock_irqsave(&db->lock, flags);
+	reg_save = readb(db->io_addr);
+
+	iow(db, DM9000_EPCR, 0x0);	/* Clear phyxcer read command */
+
+	/* The read data keeps on REG_0D & REG_0E */
+	ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
+
+	/* restore the previous address */
+	writeb(reg_save, db->io_addr);
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	mutex_unlock(&db->addr_lock);
+
+	dm9000_dbg(db, 5, "phy_read[%02x] -> %04x\n", reg, ret);
+	return ret;
+}
+
+/* Write a word to phyxcer */
+static void
+dm9000_phy_write(struct net_device *dev,
+		 int phyaddr_unused, int reg, int value)
+{
+	struct board_info *db = netdev_priv(dev);
+	unsigned long flags;
+	unsigned long reg_save;
+
+	dm9000_dbg(db, 5, "phy_write[%02x] = %04x\n", reg, value);
+	if (!db->in_timeout)
+		mutex_lock(&db->addr_lock);
+
+	spin_lock_irqsave(&db->lock, flags);
+
+	/* Save previous register address */
+	reg_save = readb(db->io_addr);
+
+	/* Fill the phyxcer register into REG_0C */
+	iow(db, DM9000_EPAR, DM9000_PHY | reg);
+
+	/* Fill the written data into REG_0D & REG_0E */
+	iow(db, DM9000_EPDRL, value);
+	iow(db, DM9000_EPDRH, value >> 8);
+
+	/* Issue phyxcer write command */
+	iow(db, DM9000_EPCR, EPCR_EPOS | EPCR_ERPRW);
+
+	writeb(reg_save, db->io_addr);
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	dm9000_msleep(db, 1);		/* Wait write complete */
+
+	spin_lock_irqsave(&db->lock, flags);
+	reg_save = readb(db->io_addr);
+
+	iow(db, DM9000_EPCR, 0x0);	/* Clear phyxcer write command */
+
+	/* restore the previous address */
+	writeb(reg_save, db->io_addr);
+
+	spin_unlock_irqrestore(&db->lock, flags);
+	if (!db->in_timeout)
+		mutex_unlock(&db->addr_lock);
+}
+
+/* dm9000_set_io
+ *
+ * select the specified set of io routines to use with the
+ * device
+ */
+
+static void dm9000_set_io(struct board_info *db, int byte_width)
+{
+	/* use the size of the data resource to work out what IO
+	 * routines we want to use
+	 */
+
+	switch (byte_width) {
+	case 1:
+		db->dumpblk = dm9000_dumpblk_8bit;
+		db->outblk  = dm9000_outblk_8bit;
+		db->inblk   = dm9000_inblk_8bit;
+		break;
+
+
+	case 3:
+		dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
+	case 2:
+		db->dumpblk = dm9000_dumpblk_16bit;
+		db->outblk  = dm9000_outblk_16bit;
+		db->inblk   = dm9000_inblk_16bit;
+		break;
+
+	case 4:
+	default:
+		db->dumpblk = dm9000_dumpblk_32bit;
+		db->outblk  = dm9000_outblk_32bit;
+		db->inblk   = dm9000_inblk_32bit;
+		break;
+	}
+}
+
+static void dm9000_schedule_poll(struct board_info *db)
+{
+	if (db->type == TYPE_DM9000E)
+		schedule_delayed_work(&db->phy_poll, HZ * 2);
+}
+
+static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+
+	if (!netif_running(dev))
+		return -EINVAL;
+
+	return generic_mii_ioctl(&dm->mii, if_mii(req), cmd, NULL);
+}
+
+static unsigned int
+dm9000_read_locked(struct board_info *db, int reg)
+{
+	unsigned long flags;
+	unsigned int ret;
+
+	spin_lock_irqsave(&db->lock, flags);
+	ret = ior(db, reg);
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	return ret;
+}
+
+static int dm9000_wait_eeprom(struct board_info *db)
+{
+	unsigned int status;
+	int timeout = 8;	/* wait max 8msec */
+
+	/* The DM9000 data sheets say we should be able to
+	 * poll the ERRE bit in EPCR to wait for the EEPROM
+	 * operation. From testing several chips, this bit
+	 * does not seem to work.
+	 *
+	 * We attempt to use the bit, but fall back to the
+	 * timeout (which is why we do not return an error
+	 * on expiry) to say that the EEPROM operation has
+	 * completed.
+	 */
+
+	while (1) {
+		status = dm9000_read_locked(db, DM9000_EPCR);
+
+		if ((status & EPCR_ERRE) == 0)
+			break;
+
+		msleep(1);
+
+		if (timeout-- < 0) {
+			dev_dbg(db->dev, "timeout waiting EEPROM\n");
+			break;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ *  Read a word data from EEPROM
+ */
+static void
+dm9000_read_eeprom(struct board_info *db, int offset, u8 *to)
+{
+	unsigned long flags;
+
+	if (db->flags & DM9000_PLATF_NO_EEPROM) {
+		to[0] = 0xff;
+		to[1] = 0xff;
+		return;
+	}
+
+	mutex_lock(&db->addr_lock);
+
+	spin_lock_irqsave(&db->lock, flags);
+
+	iow(db, DM9000_EPAR, offset);
+	iow(db, DM9000_EPCR, EPCR_ERPRR);
+
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	dm9000_wait_eeprom(db);
+
+	/* delay for at-least 150uS */
+	msleep(1);
+
+	spin_lock_irqsave(&db->lock, flags);
+
+	iow(db, DM9000_EPCR, 0x0);
+
+	to[0] = ior(db, DM9000_EPDRL);
+	to[1] = ior(db, DM9000_EPDRH);
+
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	mutex_unlock(&db->addr_lock);
+}
+
+/*
+ * Write a word data to SROM
+ */
+static void
+dm9000_write_eeprom(struct board_info *db, int offset, u8 *data)
+{
+	unsigned long flags;
+
+	if (db->flags & DM9000_PLATF_NO_EEPROM)
+		return;
+
+	mutex_lock(&db->addr_lock);
+
+	spin_lock_irqsave(&db->lock, flags);
+	iow(db, DM9000_EPAR, offset);
+	iow(db, DM9000_EPDRH, data[1]);
+	iow(db, DM9000_EPDRL, data[0]);
+	iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	dm9000_wait_eeprom(db);
+
+	mdelay(1);	/* wait at least 150uS to clear */
+
+	spin_lock_irqsave(&db->lock, flags);
+	iow(db, DM9000_EPCR, 0);
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	mutex_unlock(&db->addr_lock);
+}
+
+/* ethtool ops */
+
+static void dm9000_get_drvinfo(struct net_device *dev,
+			       struct ethtool_drvinfo *info)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+
+	strlcpy(info->driver, CARDNAME, sizeof(info->driver));
+	strlcpy(info->version, DRV_VERSION, sizeof(info->version));
+	strlcpy(info->bus_info, to_platform_device(dm->dev)->name,
+		sizeof(info->bus_info));
+}
+
+static u32 dm9000_get_msglevel(struct net_device *dev)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+
+	return dm->msg_enable;
+}
+
+static void dm9000_set_msglevel(struct net_device *dev, u32 value)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+
+	dm->msg_enable = value;
+}
+
+static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+
+	mii_ethtool_gset(&dm->mii, cmd);
+	return 0;
+}
+
+static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+
+	return mii_ethtool_sset(&dm->mii, cmd);
+}
+
+static int dm9000_nway_reset(struct net_device *dev)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+	return mii_nway_restart(&dm->mii);
+}
+
+static int dm9000_set_features(struct net_device *dev,
+	netdev_features_t features)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+	netdev_features_t changed = dev->features ^ features;
+	unsigned long flags;
+
+	if (!(changed & NETIF_F_RXCSUM))
+		return 0;
+
+	spin_lock_irqsave(&dm->lock, flags);
+	iow(dm, DM9000_RCSR, (features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0);
+	spin_unlock_irqrestore(&dm->lock, flags);
+
+	return 0;
+}
+
+static u32 dm9000_get_link(struct net_device *dev)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+	u32 ret;
+
+	if (dm->flags & DM9000_PLATF_EXT_PHY)
+		ret = mii_link_ok(&dm->mii);
+	else
+		ret = dm9000_read_locked(dm, DM9000_NSR) & NSR_LINKST ? 1 : 0;
+
+	return ret;
+}
+
+#define DM_EEPROM_MAGIC		(0x444D394B)
+
+static int dm9000_get_eeprom_len(struct net_device *dev)
+{
+	return 128;
+}
+
+static int dm9000_get_eeprom(struct net_device *dev,
+			     struct ethtool_eeprom *ee, u8 *data)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+	int offset = ee->offset;
+	int len = ee->len;
+	int i;
+
+	/* EEPROM access is aligned to two bytes */
+
+	if ((len & 1) != 0 || (offset & 1) != 0)
+		return -EINVAL;
+
+	if (dm->flags & DM9000_PLATF_NO_EEPROM)
+		return -ENOENT;
+
+	ee->magic = DM_EEPROM_MAGIC;
+
+	for (i = 0; i < len; i += 2)
+		dm9000_read_eeprom(dm, (offset + i) / 2, data + i);
+
+	return 0;
+}
+
+static int dm9000_set_eeprom(struct net_device *dev,
+			     struct ethtool_eeprom *ee, u8 *data)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+	int offset = ee->offset;
+	int len = ee->len;
+	int done;
+
+	/* EEPROM access is aligned to two bytes */
+
+	if (dm->flags & DM9000_PLATF_NO_EEPROM)
+		return -ENOENT;
+
+	if (ee->magic != DM_EEPROM_MAGIC)
+		return -EINVAL;
+
+	while (len > 0) {
+		if (len & 1 || offset & 1) {
+			int which = offset & 1;
+			u8 tmp[2];
+
+			dm9000_read_eeprom(dm, offset / 2, tmp);
+			tmp[which] = *data;
+			dm9000_write_eeprom(dm, offset / 2, tmp);
+
+			done = 1;
+		} else {
+			dm9000_write_eeprom(dm, offset / 2, data);
+			done = 2;
+		}
+
+		data += done;
+		offset += done;
+		len -= done;
+	}
+
+	return 0;
+}
+
+static void dm9000_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+
+	memset(w, 0, sizeof(struct ethtool_wolinfo));
+
+	/* note, we could probably support wake-phy too */
+	w->supported = dm->wake_supported ? WAKE_MAGIC : 0;
+	w->wolopts = dm->wake_state;
+}
+
+static int dm9000_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+	unsigned long flags;
+	u32 opts = w->wolopts;
+	u32 wcr = 0;
+
+	if (!dm->wake_supported)
+		return -EOPNOTSUPP;
+
+	if (opts & ~WAKE_MAGIC)
+		return -EINVAL;
+
+	if (opts & WAKE_MAGIC)
+		wcr |= WCR_MAGICEN;
+
+	mutex_lock(&dm->addr_lock);
+
+	spin_lock_irqsave(&dm->lock, flags);
+	iow(dm, DM9000_WCR, wcr);
+	spin_unlock_irqrestore(&dm->lock, flags);
+
+	mutex_unlock(&dm->addr_lock);
+
+	if (dm->wake_state != opts) {
+		/* change in wol state, update IRQ state */
+
+		if (!dm->wake_state)
+			irq_set_irq_wake(dm->irq_wake, 1);
+		else if (dm->wake_state && !opts)
+			irq_set_irq_wake(dm->irq_wake, 0);
+	}
+
+	dm->wake_state = opts;
+	return 0;
+}
+
+static const struct ethtool_ops dm9000_ethtool_ops = {
+	.get_drvinfo		= dm9000_get_drvinfo,
+	.get_settings		= dm9000_get_settings,
+	.set_settings		= dm9000_set_settings,
+	.get_msglevel		= dm9000_get_msglevel,
+	.set_msglevel		= dm9000_set_msglevel,
+	.nway_reset		= dm9000_nway_reset,
+	.get_link		= dm9000_get_link,
+	.get_wol		= dm9000_get_wol,
+	.set_wol		= dm9000_set_wol,
+	.get_eeprom_len		= dm9000_get_eeprom_len,
+	.get_eeprom		= dm9000_get_eeprom,
+	.set_eeprom		= dm9000_set_eeprom,
+};
+
+static void dm9000_show_carrier(struct board_info *db,
+				unsigned carrier, unsigned nsr)
+{
+	int lpa;
+	struct net_device *ndev = db->ndev;
+	struct mii_if_info *mii = &db->mii;
+	unsigned ncr = dm9000_read_locked(db, DM9000_NCR);
+
+	if (carrier) {
+		lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA);
+		dev_info(db->dev,
+			 "%s: link up, %dMbps, %s-duplex, lpa 0x%04X\n",
+			 ndev->name, (nsr & NSR_SPEED) ? 10 : 100,
+			 (ncr & NCR_FDX) ? "full" : "half", lpa);
+	} else {
+		dev_info(db->dev, "%s: link down\n", ndev->name);
+	}
+}
+
+static void
+dm9000_poll_work(struct work_struct *w)
+{
+	struct delayed_work *dw = to_delayed_work(w);
+	struct board_info *db = container_of(dw, struct board_info, phy_poll);
+	struct net_device *ndev = db->ndev;
+
+	if (db->flags & DM9000_PLATF_SIMPLE_PHY &&
+	    !(db->flags & DM9000_PLATF_EXT_PHY)) {
+		unsigned nsr = dm9000_read_locked(db, DM9000_NSR);
+		unsigned old_carrier = netif_carrier_ok(ndev) ? 1 : 0;
+		unsigned new_carrier;
+
+		new_carrier = (nsr & NSR_LINKST) ? 1 : 0;
+
+		if (old_carrier != new_carrier) {
+			if (netif_msg_link(db))
+				dm9000_show_carrier(db, new_carrier, nsr);
+
+			if (!new_carrier)
+				netif_carrier_off(ndev);
+			else
+				netif_carrier_on(ndev);
+		}
+	} else
+		mii_check_media(&db->mii, netif_msg_link(db), 0);
+
+	if (netif_running(ndev))
+		dm9000_schedule_poll(db);
+}
+
+/* dm9000_release_board
+ *
+ * release a board, and any mapped resources
+ */
+
+static void
+dm9000_release_board(struct platform_device *pdev, struct board_info *db)
+{
+	/* unmap our resources */
+
+	iounmap(db->io_addr);
+	iounmap(db->io_data);
+
+	/* release the resources */
+
+	if (db->data_req)
+		release_resource(db->data_req);
+	kfree(db->data_req);
+
+	if (db->addr_req)
+		release_resource(db->addr_req);
+	kfree(db->addr_req);
+}
+
+static unsigned char dm9000_type_to_char(enum dm9000_type type)
+{
+	switch (type) {
+	case TYPE_DM9000E: return 'e';
+	case TYPE_DM9000A: return 'a';
+	case TYPE_DM9000B: return 'b';
+	}
+
+	return '?';
+}
+
+/*
+ *  Set DM9000 multicast address
+ */
+static void
+dm9000_hash_table_unlocked(struct net_device *dev)
+{
+	struct board_info *db = netdev_priv(dev);
+	struct netdev_hw_addr *ha;
+	int i, oft;
+	u32 hash_val;
+	u16 hash_table[4] = { 0, 0, 0, 0x8000 }; /* broadcast address */
+	u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
+
+	dm9000_dbg(db, 1, "entering %s\n", __func__);
+
+	for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++)
+		iow(db, oft, dev->dev_addr[i]);
+
+	if (dev->flags & IFF_PROMISC)
+		rcr |= RCR_PRMSC;
+
+	if (dev->flags & IFF_ALLMULTI)
+		rcr |= RCR_ALL;
+
+	/* the multicast address in Hash Table : 64 bits */
+	netdev_for_each_mc_addr(ha, dev) {
+		hash_val = ether_crc_le(6, ha->addr) & 0x3f;
+		hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
+	}
+
+	/* Write the hash table to MAC MD table */
+	for (i = 0, oft = DM9000_MAR; i < 4; i++) {
+		iow(db, oft++, hash_table[i]);
+		iow(db, oft++, hash_table[i] >> 8);
+	}
+
+	iow(db, DM9000_RCR, rcr);
+}
+
+static void
+dm9000_hash_table(struct net_device *dev)
+{
+	struct board_info *db = netdev_priv(dev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&db->lock, flags);
+	dm9000_hash_table_unlocked(dev);
+	spin_unlock_irqrestore(&db->lock, flags);
+}
+
+static void
+dm9000_mask_interrupts(struct board_info *db)
+{
+	iow(db, DM9000_IMR, IMR_PAR);
+}
+
+static void
+dm9000_unmask_interrupts(struct board_info *db)
+{
+	iow(db, DM9000_IMR, db->imr_all);
+}
+
+/*
+ * Initialize dm9000 board
+ */
+static void
+dm9000_init_dm9000(struct net_device *dev)
+{
+	struct board_info *db = netdev_priv(dev);
+	unsigned int imr;
+	unsigned int ncr;
+
+	dm9000_dbg(db, 1, "entering %s\n", __func__);
+
+	dm9000_reset(db);
+	dm9000_mask_interrupts(db);
+
+	/* I/O mode */
+	db->io_mode = ior(db, DM9000_ISR) >> 6;	/* ISR bit7:6 keeps I/O mode */
+
+	/* Checksum mode */
+	if (dev->hw_features & NETIF_F_RXCSUM)
+		iow(db, DM9000_RCSR,
+			(dev->features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0);
+
+	iow(db, DM9000_GPCR, GPCR_GEP_CNTL);	/* Let GPIO0 output */
+	iow(db, DM9000_GPR, 0);
+
+	/* If we are dealing with DM9000B, some extra steps are required: a
+	 * manual phy reset, and setting init params.
+	 */
+	if (db->type == TYPE_DM9000B) {
+		dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET);
+		dm9000_phy_write(dev, 0, MII_DM_DSPCR, DSPCR_INIT_PARAM);
+	}
+
+	ncr = (db->flags & DM9000_PLATF_EXT_PHY) ? NCR_EXT_PHY : 0;
+
+	/* if wol is needed, then always set NCR_WAKEEN otherwise we end
+	 * up dumping the wake events if we disable this. There is already
+	 * a wake-mask in DM9000_WCR */
+	if (db->wake_supported)
+		ncr |= NCR_WAKEEN;
+
+	iow(db, DM9000_NCR, ncr);
+
+	/* Program operating register */
+	iow(db, DM9000_TCR, 0);	        /* TX Polling clear */
+	iow(db, DM9000_BPTR, 0x3f);	/* Less 3Kb, 200us */
+	iow(db, DM9000_FCR, 0xff);	/* Flow Control */
+	iow(db, DM9000_SMCR, 0);        /* Special Mode */
+	/* clear TX status */
+	iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
+	iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
+
+	/* Set address filter table */
+	dm9000_hash_table_unlocked(dev);
+
+	imr = IMR_PAR | IMR_PTM | IMR_PRM;
+	if (db->type != TYPE_DM9000E)
+		imr |= IMR_LNKCHNG;
+
+	db->imr_all = imr;
+
+	/* Init Driver variable */
+	db->tx_pkt_cnt = 0;
+	db->queue_pkt_len = 0;
+	dev->trans_start = jiffies;
+}
+
+/* Our watchdog timed out. Called by the networking layer */
+static void dm9000_timeout(struct net_device *dev)
+{
+	struct board_info *db = netdev_priv(dev);
+	u8 reg_save;
+	unsigned long flags;
+
+	/* Save previous register address */
+	spin_lock_irqsave(&db->lock, flags);
+	db->in_timeout = 1;
+	reg_save = readb(db->io_addr);
+
+	netif_stop_queue(dev);
+	dm9000_init_dm9000(dev);
+	dm9000_unmask_interrupts(db);
+	/* We can accept TX packets again */
+	dev->trans_start = jiffies; /* prevent tx timeout */
+	netif_wake_queue(dev);
+
+	/* Restore previous register address */
+	writeb(reg_save, db->io_addr);
+	db->in_timeout = 0;
+	spin_unlock_irqrestore(&db->lock, flags);
+}
+
+static void dm9000_send_packet(struct net_device *dev,
+			       int ip_summed,
+			       u16 pkt_len)
+{
+	struct board_info *dm = to_dm9000_board(dev);
+
+	/* The DM9000 is not smart enough to leave fragmented packets alone. */
+	if (dm->ip_summed != ip_summed) {
+		if (ip_summed == CHECKSUM_NONE)
+			iow(dm, DM9000_TCCR, 0);
+		else
+			iow(dm, DM9000_TCCR, TCCR_IP | TCCR_UDP | TCCR_TCP);
+		dm->ip_summed = ip_summed;
+	}
+
+	/* Set TX length to DM9000 */
+	iow(dm, DM9000_TXPLL, pkt_len);
+	iow(dm, DM9000_TXPLH, pkt_len >> 8);
+
+	/* Issue TX polling command */
+	iow(dm, DM9000_TCR, TCR_TXREQ);	/* Cleared after TX complete */
+}
+
+/*
+ *  Hardware start transmission.
+ *  Send a packet to media from the upper layer.
+ */
+static int
+dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	unsigned long flags;
+	struct board_info *db = netdev_priv(dev);
+
+	dm9000_dbg(db, 3, "%s:\n", __func__);
+
+	if (db->tx_pkt_cnt > 1)
+		return NETDEV_TX_BUSY;
+
+	spin_lock_irqsave(&db->lock, flags);
+
+	/* Move data to DM9000 TX RAM */
+	writeb(DM9000_MWCMD, db->io_addr);
+
+	(db->outblk)(db->io_data, skb->data, skb->len);
+	dev->stats.tx_bytes += skb->len;
+
+	db->tx_pkt_cnt++;
+	/* TX control: First packet immediately send, second packet queue */
+	if (db->tx_pkt_cnt == 1) {
+		dm9000_send_packet(dev, skb->ip_summed, skb->len);
+	} else {
+		/* Second packet */
+		db->queue_pkt_len = skb->len;
+		db->queue_ip_summed = skb->ip_summed;
+		netif_stop_queue(dev);
+	}
+
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	/* free this SKB */
+	dev_consume_skb_any(skb);
+
+	return NETDEV_TX_OK;
+}
+
+/*
+ * DM9000 interrupt handler
+ * receive the packet to upper layer, free the transmitted packet
+ */
+
+static void dm9000_tx_done(struct net_device *dev, struct board_info *db)
+{
+	int tx_status = ior(db, DM9000_NSR);	/* Got TX status */
+
+	if (tx_status & (NSR_TX2END | NSR_TX1END)) {
+		/* One packet sent complete */
+		db->tx_pkt_cnt--;
+		dev->stats.tx_packets++;
+
+		if (netif_msg_tx_done(db))
+			dev_dbg(db->dev, "tx done, NSR %02x\n", tx_status);
+
+		/* Queue packet check & send */
+		if (db->tx_pkt_cnt > 0)
+			dm9000_send_packet(dev, db->queue_ip_summed,
+					   db->queue_pkt_len);
+		netif_wake_queue(dev);
+	}
+}
+
+struct dm9000_rxhdr {
+	u8	RxPktReady;
+	u8	RxStatus;
+	__le16	RxLen;
+} __packed;
+
+/*
+ *  Received a packet and pass to upper layer
+ */
+static void
+dm9000_rx(struct net_device *dev)
+{
+	struct board_info *db = netdev_priv(dev);
+	struct dm9000_rxhdr rxhdr;
+	struct sk_buff *skb;
+	u8 rxbyte, *rdptr;
+	bool GoodPacket;
+	int RxLen;
+
+	/* Check packet ready or not */
+	do {
+		ior(db, DM9000_MRCMDX);	/* Dummy read */
+
+		/* Get most updated data */
+		rxbyte = readb(db->io_data);
+
+		/* Status check: this byte must be 0 or 1 */
+		if (rxbyte & DM9000_PKT_ERR) {
+			dev_warn(db->dev, "status check fail: %d\n", rxbyte);
+			iow(db, DM9000_RCR, 0x00);	/* Stop Device */
+			return;
+		}
+
+		if (!(rxbyte & DM9000_PKT_RDY))
+			return;
+
+		/* A packet ready now  & Get status/length */
+		GoodPacket = true;
+		writeb(DM9000_MRCMD, db->io_addr);
+
+		(db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
+
+		RxLen = le16_to_cpu(rxhdr.RxLen);
+
+		if (netif_msg_rx_status(db))
+			dev_dbg(db->dev, "RX: status %02x, length %04x\n",
+				rxhdr.RxStatus, RxLen);
+
+		/* Packet Status check */
+		if (RxLen < 0x40) {
+			GoodPacket = false;
+			if (netif_msg_rx_err(db))
+				dev_dbg(db->dev, "RX: Bad Packet (runt)\n");
+		}
+
+		if (RxLen > DM9000_PKT_MAX) {
+			dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen);
+		}
+
+		/* rxhdr.RxStatus is identical to RSR register. */
+		if (rxhdr.RxStatus & (RSR_FOE | RSR_CE | RSR_AE |
+				      RSR_PLE | RSR_RWTO |
+				      RSR_LCS | RSR_RF)) {
+			GoodPacket = false;
+			if (rxhdr.RxStatus & RSR_FOE) {
+				if (netif_msg_rx_err(db))
+					dev_dbg(db->dev, "fifo error\n");
+				dev->stats.rx_fifo_errors++;
+			}
+			if (rxhdr.RxStatus & RSR_CE) {
+				if (netif_msg_rx_err(db))
+					dev_dbg(db->dev, "crc error\n");
+				dev->stats.rx_crc_errors++;
+			}
+			if (rxhdr.RxStatus & RSR_RF) {
+				if (netif_msg_rx_err(db))
+					dev_dbg(db->dev, "length error\n");
+				dev->stats.rx_length_errors++;
+			}
+		}
+
+		/* Move data from DM9000 */
+		if (GoodPacket &&
+		    ((skb = netdev_alloc_skb(dev, RxLen + 4)) != NULL)) {
+			skb_reserve(skb, 2);
+			rdptr = (u8 *) skb_put(skb, RxLen - 4);
+
+			/* Read received packet from RX SRAM */
+
+			(db->inblk)(db->io_data, rdptr, RxLen);
+			dev->stats.rx_bytes += RxLen;
+
+			/* Pass to upper layer */
+			skb->protocol = eth_type_trans(skb, dev);
+			if (dev->features & NETIF_F_RXCSUM) {
+				if ((((rxbyte & 0x1c) << 3) & rxbyte) == 0)
+					skb->ip_summed = CHECKSUM_UNNECESSARY;
+				else
+					skb_checksum_none_assert(skb);
+			}
+			netif_rx(skb);
+			dev->stats.rx_packets++;
+
+		} else {
+			/* need to dump the packet's data */
+
+			(db->dumpblk)(db->io_data, RxLen);
+		}
+	} while (rxbyte & DM9000_PKT_RDY);
+}
+
+static irqreturn_t dm9000_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct board_info *db = netdev_priv(dev);
+	int int_status;
+	unsigned long flags;
+	u8 reg_save;
+
+	dm9000_dbg(db, 3, "entering %s\n", __func__);
+
+	/* A real interrupt coming */
+
+	/* holders of db->lock must always block IRQs */
+	spin_lock_irqsave(&db->lock, flags);
+
+	/* Save previous register address */
+	reg_save = readb(db->io_addr);
+
+	dm9000_mask_interrupts(db);
+	/* Got DM9000 interrupt status */
+	int_status = ior(db, DM9000_ISR);	/* Got ISR */
+	iow(db, DM9000_ISR, int_status);	/* Clear ISR status */
+
+	if (netif_msg_intr(db))
+		dev_dbg(db->dev, "interrupt status %02x\n", int_status);
+
+	/* Received the coming packet */
+	if (int_status & ISR_PRS)
+		dm9000_rx(dev);
+
+	/* Trnasmit Interrupt check */
+	if (int_status & ISR_PTS)
+		dm9000_tx_done(dev, db);
+
+	if (db->type != TYPE_DM9000E) {
+		if (int_status & ISR_LNKCHNG) {
+			/* fire a link-change request */
+			schedule_delayed_work(&db->phy_poll, 1);
+		}
+	}
+
+	dm9000_unmask_interrupts(db);
+	/* Restore previous register address */
+	writeb(reg_save, db->io_addr);
+
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t dm9000_wol_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct board_info *db = netdev_priv(dev);
+	unsigned long flags;
+	unsigned nsr, wcr;
+
+	spin_lock_irqsave(&db->lock, flags);
+
+	nsr = ior(db, DM9000_NSR);
+	wcr = ior(db, DM9000_WCR);
+
+	dev_dbg(db->dev, "%s: NSR=0x%02x, WCR=0x%02x\n", __func__, nsr, wcr);
+
+	if (nsr & NSR_WAKEST) {
+		/* clear, so we can avoid */
+		iow(db, DM9000_NSR, NSR_WAKEST);
+
+		if (wcr & WCR_LINKST)
+			dev_info(db->dev, "wake by link status change\n");
+		if (wcr & WCR_SAMPLEST)
+			dev_info(db->dev, "wake by sample packet\n");
+		if (wcr & WCR_MAGICST)
+			dev_info(db->dev, "wake by magic packet\n");
+		if (!(wcr & (WCR_LINKST | WCR_SAMPLEST | WCR_MAGICST)))
+			dev_err(db->dev, "wake signalled with no reason? "
+				"NSR=0x%02x, WSR=0x%02x\n", nsr, wcr);
+	}
+
+	spin_unlock_irqrestore(&db->lock, flags);
+
+	return (nsr & NSR_WAKEST) ? IRQ_HANDLED : IRQ_NONE;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ *Used by netconsole
+ */
+static void dm9000_poll_controller(struct net_device *dev)
+{
+	disable_irq(dev->irq);
+	dm9000_interrupt(dev->irq, dev);
+	enable_irq(dev->irq);
+}
+#endif
+
+/*
+ *  Open the interface.
+ *  The interface is opened whenever "ifconfig" actives it.
+ */
+static int
+dm9000_open(struct net_device *dev)
+{
+	struct board_info *db = netdev_priv(dev);
+	unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;
+
+	if (netif_msg_ifup(db))
+		dev_dbg(db->dev, "enabling %s\n", dev->name);
+
+	/* If there is no IRQ type specified, default to something that
+	 * may work, and tell the user that this is a problem */
+
+	if (irqflags == IRQF_TRIGGER_NONE)
+		irqflags = irq_get_trigger_type(dev->irq);
+
+	if (irqflags == IRQF_TRIGGER_NONE)
+		dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
+
+	irqflags |= IRQF_SHARED;
+
+	/* GPIO0 on pre-activate PHY, Reg 1F is not set by reset */
+	iow(db, DM9000_GPR, 0);	/* REG_1F bit0 activate phyxcer */
+	mdelay(1); /* delay needs by DM9000B */
+
+	/* Initialize DM9000 board */
+	dm9000_init_dm9000(dev);
+
+	if (request_irq(dev->irq, dm9000_interrupt, irqflags, dev->name, dev))
+		return -EAGAIN;
+	/* Now that we have an interrupt handler hooked up we can unmask
+	 * our interrupts
+	 */
+	dm9000_unmask_interrupts(db);
+
+	/* Init driver variable */
+	db->dbug_cnt = 0;
+
+	mii_check_media(&db->mii, netif_msg_link(db), 1);
+	netif_start_queue(dev);
+
+	/* Poll initial link status */
+	schedule_delayed_work(&db->phy_poll, 1);
+
+	return 0;
+}
+
+static void
+dm9000_shutdown(struct net_device *dev)
+{
+	struct board_info *db = netdev_priv(dev);
+
+	/* RESET device */
+	dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET);	/* PHY RESET */
+	iow(db, DM9000_GPR, 0x01);	/* Power-Down PHY */
+	dm9000_mask_interrupts(db);
+	iow(db, DM9000_RCR, 0x00);	/* Disable RX */
+}
+
+/*
+ * Stop the interface.
+ * The interface is stopped when it is brought.
+ */
+static int
+dm9000_stop(struct net_device *ndev)
+{
+	struct board_info *db = netdev_priv(ndev);
+
+	if (netif_msg_ifdown(db))
+		dev_dbg(db->dev, "shutting down %s\n", ndev->name);
+
+	cancel_delayed_work_sync(&db->phy_poll);
+
+	netif_stop_queue(ndev);
+	netif_carrier_off(ndev);
+
+	/* free interrupt */
+	free_irq(ndev->irq, ndev);
+
+	dm9000_shutdown(ndev);
+
+	return 0;
+}
+
+static const struct net_device_ops dm9000_netdev_ops = {
+	.ndo_open		= dm9000_open,
+	.ndo_stop		= dm9000_stop,
+	.ndo_start_xmit		= dm9000_start_xmit,
+	.ndo_tx_timeout		= dm9000_timeout,
+	.ndo_set_rx_mode	= dm9000_hash_table,
+	.ndo_do_ioctl		= dm9000_ioctl,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_set_features	= dm9000_set_features,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_set_mac_address	= eth_mac_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller	= dm9000_poll_controller,
+#endif
+};
+
+static struct dm9000_plat_data *dm9000_parse_dt(struct device *dev)
+{
+	struct dm9000_plat_data *pdata;
+	struct device_node *np = dev->of_node;
+	const void *mac_addr;
+
+	if (!IS_ENABLED(CONFIG_OF) || !np)
+		return ERR_PTR(-ENXIO);
+
+	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return ERR_PTR(-ENOMEM);
+
+	if (of_find_property(np, "davicom,ext-phy", NULL))
+		pdata->flags |= DM9000_PLATF_EXT_PHY;
+	if (of_find_property(np, "davicom,no-eeprom", NULL))
+		pdata->flags |= DM9000_PLATF_NO_EEPROM;
+
+	mac_addr = of_get_mac_address(np);
+	if (mac_addr)
+		memcpy(pdata->dev_addr, mac_addr, sizeof(pdata->dev_addr));
+
+	return pdata;
+}
+
+/*
+ * Search DM9000 board, allocate space and register it
+ */
+static int
+dm9000_probe(struct platform_device *pdev)
+{
+	struct dm9000_plat_data *pdata = dev_get_platdata(&pdev->dev);
+	struct board_info *db;	/* Point a board information structure */
+	struct net_device *ndev;
+	struct device *dev = &pdev->dev;
+	const unsigned char *mac_src;
+	int ret = 0;
+	int iosize;
+	int i;
+	u32 id_val;
+	int reset_gpios;
+	enum of_gpio_flags flags;
+	struct regulator *power;
+
+	power = devm_regulator_get(dev, "vcc");
+	if (IS_ERR(power)) {
+		if (PTR_ERR(power) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_dbg(dev, "no regulator provided\n");
+	} else {
+		ret = regulator_enable(power);
+		if (ret != 0) {
+			dev_err(dev,
+				"Failed to enable power regulator: %d\n", ret);
+			return ret;
+		}
+		dev_dbg(dev, "regulator enabled\n");
+	}
+
+	reset_gpios = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0,
+					      &flags);
+	if (gpio_is_valid(reset_gpios)) {
+		ret = devm_gpio_request_one(dev, reset_gpios, flags,
+					    "dm9000_reset");
+		if (ret) {
+			dev_err(dev, "failed to request reset gpio %d: %d\n",
+				reset_gpios, ret);
+			return -ENODEV;
+		}
+
+		/* According to manual PWRST# Low Period Min 1ms */
+		msleep(2);
+		gpio_set_value(reset_gpios, 1);
+		/* Needs 3ms to read eeprom when PWRST is deasserted */
+		msleep(4);
+	}
+
+	if (!pdata) {
+		pdata = dm9000_parse_dt(&pdev->dev);
+		if (IS_ERR(pdata))
+			return PTR_ERR(pdata);
+	}
+
+	/* Init network device */
+	ndev = alloc_etherdev(sizeof(struct board_info));
+	if (!ndev)
+		return -ENOMEM;
+
+	SET_NETDEV_DEV(ndev, &pdev->dev);
+
+	dev_dbg(&pdev->dev, "dm9000_probe()\n");
+
+	/* setup board info structure */
+	db = netdev_priv(ndev);
+
+	db->dev = &pdev->dev;
+	db->ndev = ndev;
+
+	spin_lock_init(&db->lock);
+	mutex_init(&db->addr_lock);
+
+	INIT_DELAYED_WORK(&db->phy_poll, dm9000_poll_work);
+
+	db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	db->irq_res  = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+
+	if (db->addr_res == NULL || db->data_res == NULL ||
+	    db->irq_res == NULL) {
+		dev_err(db->dev, "insufficient resources\n");
+		ret = -ENOENT;
+		goto out;
+	}
+
+	db->irq_wake = platform_get_irq(pdev, 1);
+	if (db->irq_wake >= 0) {
+		dev_dbg(db->dev, "wakeup irq %d\n", db->irq_wake);
+
+		ret = request_irq(db->irq_wake, dm9000_wol_interrupt,
+				  IRQF_SHARED, dev_name(db->dev), ndev);
+		if (ret) {
+			dev_err(db->dev, "cannot get wakeup irq (%d)\n", ret);
+		} else {
+
+			/* test to see if irq is really wakeup capable */
+			ret = irq_set_irq_wake(db->irq_wake, 1);
+			if (ret) {
+				dev_err(db->dev, "irq %d cannot set wakeup (%d)\n",
+					db->irq_wake, ret);
+				ret = 0;
+			} else {
+				irq_set_irq_wake(db->irq_wake, 0);
+				db->wake_supported = 1;
+			}
+		}
+	}
+
+	iosize = resource_size(db->addr_res);
+	db->addr_req = request_mem_region(db->addr_res->start, iosize,
+					  pdev->name);
+
+	if (db->addr_req == NULL) {
+		dev_err(db->dev, "cannot claim address reg area\n");
+		ret = -EIO;
+		goto out;
+	}
+
+	db->io_addr = ioremap(db->addr_res->start, iosize);
+
+	if (db->io_addr == NULL) {
+		dev_err(db->dev, "failed to ioremap address reg\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	iosize = resource_size(db->data_res);
+	db->data_req = request_mem_region(db->data_res->start, iosize,
+					  pdev->name);
+
+	if (db->data_req == NULL) {
+		dev_err(db->dev, "cannot claim data reg area\n");
+		ret = -EIO;
+		goto out;
+	}
+
+	db->io_data = ioremap(db->data_res->start, iosize);
+
+	if (db->io_data == NULL) {
+		dev_err(db->dev, "failed to ioremap data reg\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/* fill in parameters for net-dev structure */
+	ndev->base_addr = (unsigned long)db->io_addr;
+	ndev->irq	= db->irq_res->start;
+
+	/* ensure at least we have a default set of IO routines */
+	dm9000_set_io(db, iosize);
+
+	/* check to see if anything is being over-ridden */
+	if (pdata != NULL) {
+		/* check to see if the driver wants to over-ride the
+		 * default IO width */
+
+		if (pdata->flags & DM9000_PLATF_8BITONLY)
+			dm9000_set_io(db, 1);
+
+		if (pdata->flags & DM9000_PLATF_16BITONLY)
+			dm9000_set_io(db, 2);
+
+		if (pdata->flags & DM9000_PLATF_32BITONLY)
+			dm9000_set_io(db, 4);
+
+		/* check to see if there are any IO routine
+		 * over-rides */
+
+		if (pdata->inblk != NULL)
+			db->inblk = pdata->inblk;
+
+		if (pdata->outblk != NULL)
+			db->outblk = pdata->outblk;
+
+		if (pdata->dumpblk != NULL)
+			db->dumpblk = pdata->dumpblk;
+
+		db->flags = pdata->flags;
+	}
+
+#ifdef CONFIG_DM9000_FORCE_SIMPLE_PHY_POLL
+	db->flags |= DM9000_PLATF_SIMPLE_PHY;
+#endif
+
+	dm9000_reset(db);
+
+	/* try multiple times, DM9000 sometimes gets the read wrong */
+	for (i = 0; i < 8; i++) {
+		id_val  = ior(db, DM9000_VIDL);
+		id_val |= (u32)ior(db, DM9000_VIDH) << 8;
+		id_val |= (u32)ior(db, DM9000_PIDL) << 16;
+		id_val |= (u32)ior(db, DM9000_PIDH) << 24;
+
+		if (id_val == DM9000_ID)
+			break;
+		dev_err(db->dev, "read wrong id 0x%08x\n", id_val);
+	}
+
+	if (id_val != DM9000_ID) {
+		dev_err(db->dev, "wrong id: 0x%08x\n", id_val);
+		ret = -ENODEV;
+		goto out;
+	}
+
+	/* Identify what type of DM9000 we are working on */
+
+	id_val = ior(db, DM9000_CHIPR);
+	dev_dbg(db->dev, "dm9000 revision 0x%02x\n", id_val);
+
+	switch (id_val) {
+	case CHIPR_DM9000A:
+		db->type = TYPE_DM9000A;
+		break;
+	case CHIPR_DM9000B:
+		db->type = TYPE_DM9000B;
+		break;
+	default:
+		dev_dbg(db->dev, "ID %02x => defaulting to DM9000E\n", id_val);
+		db->type = TYPE_DM9000E;
+	}
+
+	/* dm9000a/b are capable of hardware checksum offload */
+	if (db->type == TYPE_DM9000A || db->type == TYPE_DM9000B) {
+		ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
+		ndev->features |= ndev->hw_features;
+	}
+
+	/* from this point we assume that we have found a DM9000 */
+
+	ndev->netdev_ops	= &dm9000_netdev_ops;
+	ndev->watchdog_timeo	= msecs_to_jiffies(watchdog);
+	ndev->ethtool_ops	= &dm9000_ethtool_ops;
+
+	db->msg_enable       = NETIF_MSG_LINK;
+	db->mii.phy_id_mask  = 0x1f;
+	db->mii.reg_num_mask = 0x1f;
+	db->mii.force_media  = 0;
+	db->mii.full_duplex  = 0;
+	db->mii.dev	     = ndev;
+	db->mii.mdio_read    = dm9000_phy_read;
+	db->mii.mdio_write   = dm9000_phy_write;
+
+	mac_src = "eeprom";
+
+	/* try reading the node address from the attached EEPROM */
+	for (i = 0; i < 6; i += 2)
+		dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i);
+
+	if (!is_valid_ether_addr(ndev->dev_addr) && pdata != NULL) {
+		mac_src = "platform data";
+		memcpy(ndev->dev_addr, pdata->dev_addr, ETH_ALEN);
+	}
+
+	if (!is_valid_ether_addr(ndev->dev_addr)) {
+		/* try reading from mac */
+
+		mac_src = "chip";
+		for (i = 0; i < 6; i++)
+			ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
+	}
+
+	if (!is_valid_ether_addr(ndev->dev_addr)) {
+		dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
+			 "set using ifconfig\n", ndev->name);
+
+		eth_hw_addr_random(ndev);
+		mac_src = "random";
+	}
+
+
+	platform_set_drvdata(pdev, ndev);
+	ret = register_netdev(ndev);
+
+	if (ret == 0)
+		printk(KERN_INFO "%s: dm9000%c at %p,%p IRQ %d MAC: %pM (%s)\n",
+		       ndev->name, dm9000_type_to_char(db->type),
+		       db->io_addr, db->io_data, ndev->irq,
+		       ndev->dev_addr, mac_src);
+	return 0;
+
+out:
+	dev_err(db->dev, "not found (%d).\n", ret);
+
+	dm9000_release_board(pdev, db);
+	free_netdev(ndev);
+
+	return ret;
+}
+
+static int
+dm9000_drv_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct board_info *db;
+
+	if (ndev) {
+		db = netdev_priv(ndev);
+		db->in_suspend = 1;
+
+		if (!netif_running(ndev))
+			return 0;
+
+		netif_device_detach(ndev);
+
+		/* only shutdown if not using WoL */
+		if (!db->wake_state)
+			dm9000_shutdown(ndev);
+	}
+	return 0;
+}
+
+static int
+dm9000_drv_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct board_info *db = netdev_priv(ndev);
+
+	if (ndev) {
+		if (netif_running(ndev)) {
+			/* reset if we were not in wake mode to ensure if
+			 * the device was powered off it is in a known state */
+			if (!db->wake_state) {
+				dm9000_init_dm9000(ndev);
+				dm9000_unmask_interrupts(db);
+			}
+
+			netif_device_attach(ndev);
+		}
+
+		db->in_suspend = 0;
+	}
+	return 0;
+}
+
+static const struct dev_pm_ops dm9000_drv_pm_ops = {
+	.suspend	= dm9000_drv_suspend,
+	.resume		= dm9000_drv_resume,
+};
+
+static int
+dm9000_drv_remove(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+
+	unregister_netdev(ndev);
+	dm9000_release_board(pdev, netdev_priv(ndev));
+	free_netdev(ndev);		/* free device structure */
+
+	dev_dbg(&pdev->dev, "released and freed device\n");
+	return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id dm9000_of_matches[] = {
+	{ .compatible = "davicom,dm9000", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dm9000_of_matches);
+#endif
+
+static struct platform_driver dm9000_driver = {
+	.driver	= {
+		.name    = "dm9000",
+		.pm	 = &dm9000_drv_pm_ops,
+		.of_match_table = of_match_ptr(dm9000_of_matches),
+	},
+	.probe   = dm9000_probe,
+	.remove  = dm9000_drv_remove,
+};
+
+module_platform_driver(dm9000_driver);
+
+MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
+MODULE_DESCRIPTION("Davicom DM9000 network driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:dm9000");