enc28j60: Move the Microchip driver

Move the Microchip driver into drivers/net/ethernet/microchip/ and
make the necessary Kconfig and Makefile changes.

CC: Claudio Lanconelli <lanconelli.claudio@eptar.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 1667 deletions

diff --git a/drivers/net/enc28j60.c b/drivers/net/enc28j60.c
deleted file mode 100644
index 2837ce209cd..00000000000
--- a/drivers/net/enc28j60.c
+++ /dev/null
@@ -1,1667 +0,0 @@
-/*
- * Microchip ENC28J60 ethernet driver (MAC + PHY)
- *
- * Copyright (C) 2007 Eurek srl
- * Author: Claudio Lanconelli <lanconelli.claudio@eptar.com>
- * based on enc28j60.c written by David Anders for 2.4 kernel version
- *
- * 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.
- *
- * $Id: enc28j60.c,v 1.22 2007/12/20 10:47:01 claudio Exp $
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/interrupt.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/tcp.h>
-#include <linux/skbuff.h>
-#include <linux/delay.h>
-#include <linux/spi/spi.h>
-
-#include "enc28j60_hw.h"
-
-#define DRV_NAME	"enc28j60"
-#define DRV_VERSION	"1.01"
-
-#define SPI_OPLEN	1
-
-#define ENC28J60_MSG_DEFAULT	\
-	(NETIF_MSG_PROBE | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN | NETIF_MSG_LINK)
-
-/* Buffer size required for the largest SPI transfer (i.e., reading a
- * frame). */
-#define SPI_TRANSFER_BUF_LEN	(4 + MAX_FRAMELEN)
-
-#define TX_TIMEOUT	(4 * HZ)
-
-/* Max TX retries in case of collision as suggested by errata datasheet */
-#define MAX_TX_RETRYCOUNT	16
-
-enum {
-	RXFILTER_NORMAL,
-	RXFILTER_MULTI,
-	RXFILTER_PROMISC
-};
-
-/* Driver local data */
-struct enc28j60_net {
-	struct net_device *netdev;
-	struct spi_device *spi;
-	struct mutex lock;
-	struct sk_buff *tx_skb;
-	struct work_struct tx_work;
-	struct work_struct irq_work;
-	struct work_struct setrx_work;
-	struct work_struct restart_work;
-	u8 bank;		/* current register bank selected */
-	u16 next_pk_ptr;	/* next packet pointer within FIFO */
-	u16 max_pk_counter;	/* statistics: max packet counter */
-	u16 tx_retry_count;
-	bool hw_enable;
-	bool full_duplex;
-	int rxfilter;
-	u32 msg_enable;
-	u8 spi_transfer_buf[SPI_TRANSFER_BUF_LEN];
-};
-
-/* use ethtool to change the level for any given device */
-static struct {
-	u32 msg_enable;
-} debug = { -1 };
-
-/*
- * SPI read buffer
- * wait for the SPI transfer and copy received data to destination
- */
-static int
-spi_read_buf(struct enc28j60_net *priv, int len, u8 *data)
-{
-	u8 *rx_buf = priv->spi_transfer_buf + 4;
-	u8 *tx_buf = priv->spi_transfer_buf;
-	struct spi_transfer t = {
-		.tx_buf = tx_buf,
-		.rx_buf = rx_buf,
-		.len = SPI_OPLEN + len,
-	};
-	struct spi_message msg;
-	int ret;
-
-	tx_buf[0] = ENC28J60_READ_BUF_MEM;
-	tx_buf[1] = tx_buf[2] = tx_buf[3] = 0;	/* don't care */
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&t, &msg);
-	ret = spi_sync(priv->spi, &msg);
-	if (ret == 0) {
-		memcpy(data, &rx_buf[SPI_OPLEN], len);
-		ret = msg.status;
-	}
-	if (ret && netif_msg_drv(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n",
-			__func__, ret);
-
-	return ret;
-}
-
-/*
- * SPI write buffer
- */
-static int spi_write_buf(struct enc28j60_net *priv, int len,
-			 const u8 *data)
-{
-	int ret;
-
-	if (len > SPI_TRANSFER_BUF_LEN - 1 || len <= 0)
-		ret = -EINVAL;
-	else {
-		priv->spi_transfer_buf[0] = ENC28J60_WRITE_BUF_MEM;
-		memcpy(&priv->spi_transfer_buf[1], data, len);
-		ret = spi_write(priv->spi, priv->spi_transfer_buf, len + 1);
-		if (ret && netif_msg_drv(priv))
-			printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n",
-				__func__, ret);
-	}
-	return ret;
-}
-
-/*
- * basic SPI read operation
- */
-static u8 spi_read_op(struct enc28j60_net *priv, u8 op,
-			   u8 addr)
-{
-	u8 tx_buf[2];
-	u8 rx_buf[4];
-	u8 val = 0;
-	int ret;
-	int slen = SPI_OPLEN;
-
-	/* do dummy read if needed */
-	if (addr & SPRD_MASK)
-		slen++;
-
-	tx_buf[0] = op | (addr & ADDR_MASK);
-	ret = spi_write_then_read(priv->spi, tx_buf, 1, rx_buf, slen);
-	if (ret)
-		printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n",
-			__func__, ret);
-	else
-		val = rx_buf[slen - 1];
-
-	return val;
-}
-
-/*
- * basic SPI write operation
- */
-static int spi_write_op(struct enc28j60_net *priv, u8 op,
-			u8 addr, u8 val)
-{
-	int ret;
-
-	priv->spi_transfer_buf[0] = op | (addr & ADDR_MASK);
-	priv->spi_transfer_buf[1] = val;
-	ret = spi_write(priv->spi, priv->spi_transfer_buf, 2);
-	if (ret && netif_msg_drv(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n",
-			__func__, ret);
-	return ret;
-}
-
-static void enc28j60_soft_reset(struct enc28j60_net *priv)
-{
-	if (netif_msg_hw(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__);
-
-	spi_write_op(priv, ENC28J60_SOFT_RESET, 0, ENC28J60_SOFT_RESET);
-	/* Errata workaround #1, CLKRDY check is unreliable,
-	 * delay at least 1 mS instead */
-	udelay(2000);
-}
-
-/*
- * select the current register bank if necessary
- */
-static void enc28j60_set_bank(struct enc28j60_net *priv, u8 addr)
-{
-	u8 b = (addr & BANK_MASK) >> 5;
-
-	/* These registers (EIE, EIR, ESTAT, ECON2, ECON1)
-	 * are present in all banks, no need to switch bank
-	 */
-	if (addr >= EIE && addr <= ECON1)
-		return;
-
-	/* Clear or set each bank selection bit as needed */
-	if ((b & ECON1_BSEL0) != (priv->bank & ECON1_BSEL0)) {
-		if (b & ECON1_BSEL0)
-			spi_write_op(priv, ENC28J60_BIT_FIELD_SET, ECON1,
-					ECON1_BSEL0);
-		else
-			spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, ECON1,
-					ECON1_BSEL0);
-	}
-	if ((b & ECON1_BSEL1) != (priv->bank & ECON1_BSEL1)) {
-		if (b & ECON1_BSEL1)
-			spi_write_op(priv, ENC28J60_BIT_FIELD_SET, ECON1,
-					ECON1_BSEL1);
-		else
-			spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, ECON1,
-					ECON1_BSEL1);
-	}
-	priv->bank = b;
-}
-
-/*
- * Register access routines through the SPI bus.
- * Every register access comes in two flavours:
- * - nolock_xxx: caller needs to invoke mutex_lock, usually to access
- *   atomically more than one register
- * - locked_xxx: caller doesn't need to invoke mutex_lock, single access
- *
- * Some registers can be accessed through the bit field clear and
- * bit field set to avoid a read modify write cycle.
- */
-
-/*
- * Register bit field Set
- */
-static void nolock_reg_bfset(struct enc28j60_net *priv,
-				      u8 addr, u8 mask)
-{
-	enc28j60_set_bank(priv, addr);
-	spi_write_op(priv, ENC28J60_BIT_FIELD_SET, addr, mask);
-}
-
-static void locked_reg_bfset(struct enc28j60_net *priv,
-				      u8 addr, u8 mask)
-{
-	mutex_lock(&priv->lock);
-	nolock_reg_bfset(priv, addr, mask);
-	mutex_unlock(&priv->lock);
-}
-
-/*
- * Register bit field Clear
- */
-static void nolock_reg_bfclr(struct enc28j60_net *priv,
-				      u8 addr, u8 mask)
-{
-	enc28j60_set_bank(priv, addr);
-	spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, addr, mask);
-}
-
-static void locked_reg_bfclr(struct enc28j60_net *priv,
-				      u8 addr, u8 mask)
-{
-	mutex_lock(&priv->lock);
-	nolock_reg_bfclr(priv, addr, mask);
-	mutex_unlock(&priv->lock);
-}
-
-/*
- * Register byte read
- */
-static int nolock_regb_read(struct enc28j60_net *priv,
-				     u8 address)
-{
-	enc28j60_set_bank(priv, address);
-	return spi_read_op(priv, ENC28J60_READ_CTRL_REG, address);
-}
-
-static int locked_regb_read(struct enc28j60_net *priv,
-				     u8 address)
-{
-	int ret;
-
-	mutex_lock(&priv->lock);
-	ret = nolock_regb_read(priv, address);
-	mutex_unlock(&priv->lock);
-
-	return ret;
-}
-
-/*
- * Register word read
- */
-static int nolock_regw_read(struct enc28j60_net *priv,
-				     u8 address)
-{
-	int rl, rh;
-
-	enc28j60_set_bank(priv, address);
-	rl = spi_read_op(priv, ENC28J60_READ_CTRL_REG, address);
-	rh = spi_read_op(priv, ENC28J60_READ_CTRL_REG, address + 1);
-
-	return (rh << 8) | rl;
-}
-
-static int locked_regw_read(struct enc28j60_net *priv,
-				     u8 address)
-{
-	int ret;
-
-	mutex_lock(&priv->lock);
-	ret = nolock_regw_read(priv, address);
-	mutex_unlock(&priv->lock);
-
-	return ret;
-}
-
-/*
- * Register byte write
- */
-static void nolock_regb_write(struct enc28j60_net *priv,
-				       u8 address, u8 data)
-{
-	enc28j60_set_bank(priv, address);
-	spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address, data);
-}
-
-static void locked_regb_write(struct enc28j60_net *priv,
-				       u8 address, u8 data)
-{
-	mutex_lock(&priv->lock);
-	nolock_regb_write(priv, address, data);
-	mutex_unlock(&priv->lock);
-}
-
-/*
- * Register word write
- */
-static void nolock_regw_write(struct enc28j60_net *priv,
-				       u8 address, u16 data)
-{
-	enc28j60_set_bank(priv, address);
-	spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address, (u8) data);
-	spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address + 1,
-		     (u8) (data >> 8));
-}
-
-static void locked_regw_write(struct enc28j60_net *priv,
-				       u8 address, u16 data)
-{
-	mutex_lock(&priv->lock);
-	nolock_regw_write(priv, address, data);
-	mutex_unlock(&priv->lock);
-}
-
-/*
- * Buffer memory read
- * Select the starting address and execute a SPI buffer read
- */
-static void enc28j60_mem_read(struct enc28j60_net *priv,
-				     u16 addr, int len, u8 *data)
-{
-	mutex_lock(&priv->lock);
-	nolock_regw_write(priv, ERDPTL, addr);
-#ifdef CONFIG_ENC28J60_WRITEVERIFY
-	if (netif_msg_drv(priv)) {
-		u16 reg;
-		reg = nolock_regw_read(priv, ERDPTL);
-		if (reg != addr)
-			printk(KERN_DEBUG DRV_NAME ": %s() error writing ERDPT "
-				"(0x%04x - 0x%04x)\n", __func__, reg, addr);
-	}
-#endif
-	spi_read_buf(priv, len, data);
-	mutex_unlock(&priv->lock);
-}
-
-/*
- * Write packet to enc28j60 TX buffer memory
- */
-static void
-enc28j60_packet_write(struct enc28j60_net *priv, int len, const u8 *data)
-{
-	mutex_lock(&priv->lock);
-	/* Set the write pointer to start of transmit buffer area */
-	nolock_regw_write(priv, EWRPTL, TXSTART_INIT);
-#ifdef CONFIG_ENC28J60_WRITEVERIFY
-	if (netif_msg_drv(priv)) {
-		u16 reg;
-		reg = nolock_regw_read(priv, EWRPTL);
-		if (reg != TXSTART_INIT)
-			printk(KERN_DEBUG DRV_NAME
-				": %s() ERWPT:0x%04x != 0x%04x\n",
-				__func__, reg, TXSTART_INIT);
-	}
-#endif
-	/* Set the TXND pointer to correspond to the packet size given */
-	nolock_regw_write(priv, ETXNDL, TXSTART_INIT + len);
-	/* write per-packet control byte */
-	spi_write_op(priv, ENC28J60_WRITE_BUF_MEM, 0, 0x00);
-	if (netif_msg_hw(priv))
-		printk(KERN_DEBUG DRV_NAME
-			": %s() after control byte ERWPT:0x%04x\n",
-			__func__, nolock_regw_read(priv, EWRPTL));
-	/* copy the packet into the transmit buffer */
-	spi_write_buf(priv, len, data);
-	if (netif_msg_hw(priv))
-		printk(KERN_DEBUG DRV_NAME
-			 ": %s() after write packet ERWPT:0x%04x, len=%d\n",
-			 __func__, nolock_regw_read(priv, EWRPTL), len);
-	mutex_unlock(&priv->lock);
-}
-
-static unsigned long msec20_to_jiffies;
-
-static int poll_ready(struct enc28j60_net *priv, u8 reg, u8 mask, u8 val)
-{
-	unsigned long timeout = jiffies + msec20_to_jiffies;
-
-	/* 20 msec timeout read */
-	while ((nolock_regb_read(priv, reg) & mask) != val) {
-		if (time_after(jiffies, timeout)) {
-			if (netif_msg_drv(priv))
-				dev_dbg(&priv->spi->dev,
-					"reg %02x ready timeout!\n", reg);
-			return -ETIMEDOUT;
-		}
-		cpu_relax();
-	}
-	return 0;
-}
-
-/*
- * Wait until the PHY operation is complete.
- */
-static int wait_phy_ready(struct enc28j60_net *priv)
-{
-	return poll_ready(priv, MISTAT, MISTAT_BUSY, 0) ? 0 : 1;
-}
-
-/*
- * PHY register read
- * PHY registers are not accessed directly, but through the MII
- */
-static u16 enc28j60_phy_read(struct enc28j60_net *priv, u8 address)
-{
-	u16 ret;
-
-	mutex_lock(&priv->lock);
-	/* set the PHY register address */
-	nolock_regb_write(priv, MIREGADR, address);
-	/* start the register read operation */
-	nolock_regb_write(priv, MICMD, MICMD_MIIRD);
-	/* wait until the PHY read completes */
-	wait_phy_ready(priv);
-	/* quit reading */
-	nolock_regb_write(priv, MICMD, 0x00);
-	/* return the data */
-	ret  = nolock_regw_read(priv, MIRDL);
-	mutex_unlock(&priv->lock);
-
-	return ret;
-}
-
-static int enc28j60_phy_write(struct enc28j60_net *priv, u8 address, u16 data)
-{
-	int ret;
-
-	mutex_lock(&priv->lock);
-	/* set the PHY register address */
-	nolock_regb_write(priv, MIREGADR, address);
-	/* write the PHY data */
-	nolock_regw_write(priv, MIWRL, data);
-	/* wait until the PHY write completes and return */
-	ret = wait_phy_ready(priv);
-	mutex_unlock(&priv->lock);
-
-	return ret;
-}
-
-/*
- * Program the hardware MAC address from dev->dev_addr.
- */
-static int enc28j60_set_hw_macaddr(struct net_device *ndev)
-{
-	int ret;
-	struct enc28j60_net *priv = netdev_priv(ndev);
-
-	mutex_lock(&priv->lock);
-	if (!priv->hw_enable) {
-		if (netif_msg_drv(priv))
-			printk(KERN_INFO DRV_NAME
-				": %s: Setting MAC address to %pM\n",
-				ndev->name, ndev->dev_addr);
-		/* NOTE: MAC address in ENC28J60 is byte-backward */
-		nolock_regb_write(priv, MAADR5, ndev->dev_addr[0]);
-		nolock_regb_write(priv, MAADR4, ndev->dev_addr[1]);
-		nolock_regb_write(priv, MAADR3, ndev->dev_addr[2]);
-		nolock_regb_write(priv, MAADR2, ndev->dev_addr[3]);
-		nolock_regb_write(priv, MAADR1, ndev->dev_addr[4]);
-		nolock_regb_write(priv, MAADR0, ndev->dev_addr[5]);
-		ret = 0;
-	} else {
-		if (netif_msg_drv(priv))
-			printk(KERN_DEBUG DRV_NAME
-				": %s() Hardware must be disabled to set "
-				"Mac address\n", __func__);
-		ret = -EBUSY;
-	}
-	mutex_unlock(&priv->lock);
-	return ret;
-}
-
-/*
- * Store the new hardware address in dev->dev_addr, and update the MAC.
- */
-static int enc28j60_set_mac_address(struct net_device *dev, void *addr)
-{
-	struct sockaddr *address = addr;
-
-	if (netif_running(dev))
-		return -EBUSY;
-	if (!is_valid_ether_addr(address->sa_data))
-		return -EADDRNOTAVAIL;
-
-	memcpy(dev->dev_addr, address->sa_data, dev->addr_len);
-	return enc28j60_set_hw_macaddr(dev);
-}
-
-/*
- * Debug routine to dump useful register contents
- */
-static void enc28j60_dump_regs(struct enc28j60_net *priv, const char *msg)
-{
-	mutex_lock(&priv->lock);
-	printk(KERN_DEBUG DRV_NAME " %s\n"
-		"HwRevID: 0x%02x\n"
-		"Cntrl: ECON1 ECON2 ESTAT  EIR  EIE\n"
-		"       0x%02x  0x%02x  0x%02x  0x%02x  0x%02x\n"
-		"MAC  : MACON1 MACON3 MACON4\n"
-		"       0x%02x   0x%02x   0x%02x\n"
-		"Rx   : ERXST  ERXND  ERXWRPT ERXRDPT ERXFCON EPKTCNT MAMXFL\n"
-		"       0x%04x 0x%04x 0x%04x  0x%04x  "
-		"0x%02x    0x%02x    0x%04x\n"
-		"Tx   : ETXST  ETXND  MACLCON1 MACLCON2 MAPHSUP\n"
-		"       0x%04x 0x%04x 0x%02x     0x%02x     0x%02x\n",
-		msg, nolock_regb_read(priv, EREVID),
-		nolock_regb_read(priv, ECON1), nolock_regb_read(priv, ECON2),
-		nolock_regb_read(priv, ESTAT), nolock_regb_read(priv, EIR),
-		nolock_regb_read(priv, EIE), nolock_regb_read(priv, MACON1),
-		nolock_regb_read(priv, MACON3), nolock_regb_read(priv, MACON4),
-		nolock_regw_read(priv, ERXSTL), nolock_regw_read(priv, ERXNDL),
-		nolock_regw_read(priv, ERXWRPTL),
-		nolock_regw_read(priv, ERXRDPTL),
-		nolock_regb_read(priv, ERXFCON),
-		nolock_regb_read(priv, EPKTCNT),
-		nolock_regw_read(priv, MAMXFLL), nolock_regw_read(priv, ETXSTL),
-		nolock_regw_read(priv, ETXNDL),
-		nolock_regb_read(priv, MACLCON1),
-		nolock_regb_read(priv, MACLCON2),
-		nolock_regb_read(priv, MAPHSUP));
-	mutex_unlock(&priv->lock);
-}
-
-/*
- * ERXRDPT need to be set always at odd addresses, refer to errata datasheet
- */
-static u16 erxrdpt_workaround(u16 next_packet_ptr, u16 start, u16 end)
-{
-	u16 erxrdpt;
-
-	if ((next_packet_ptr - 1 < start) || (next_packet_ptr - 1 > end))
-		erxrdpt = end;
-	else
-		erxrdpt = next_packet_ptr - 1;
-
-	return erxrdpt;
-}
-
-/*
- * Calculate wrap around when reading beyond the end of the RX buffer
- */
-static u16 rx_packet_start(u16 ptr)
-{
-	if (ptr + RSV_SIZE > RXEND_INIT)
-		return (ptr + RSV_SIZE) - (RXEND_INIT - RXSTART_INIT + 1);
-	else
-		return ptr + RSV_SIZE;
-}
-
-static void nolock_rxfifo_init(struct enc28j60_net *priv, u16 start, u16 end)
-{
-	u16 erxrdpt;
-
-	if (start > 0x1FFF || end > 0x1FFF || start > end) {
-		if (netif_msg_drv(priv))
-			printk(KERN_ERR DRV_NAME ": %s(%d, %d) RXFIFO "
-				"bad parameters!\n", __func__, start, end);
-		return;
-	}
-	/* set receive buffer start + end */
-	priv->next_pk_ptr = start;
-	nolock_regw_write(priv, ERXSTL, start);
-	erxrdpt = erxrdpt_workaround(priv->next_pk_ptr, start, end);
-	nolock_regw_write(priv, ERXRDPTL, erxrdpt);
-	nolock_regw_write(priv, ERXNDL, end);
-}
-
-static void nolock_txfifo_init(struct enc28j60_net *priv, u16 start, u16 end)
-{
-	if (start > 0x1FFF || end > 0x1FFF || start > end) {
-		if (netif_msg_drv(priv))
-			printk(KERN_ERR DRV_NAME ": %s(%d, %d) TXFIFO "
-				"bad parameters!\n", __func__, start, end);
-		return;
-	}
-	/* set transmit buffer start + end */
-	nolock_regw_write(priv, ETXSTL, start);
-	nolock_regw_write(priv, ETXNDL, end);
-}
-
-/*
- * Low power mode shrinks power consumption about 100x, so we'd like
- * the chip to be in that mode whenever it's inactive.  (However, we
- * can't stay in lowpower mode during suspend with WOL active.)
- */
-static void enc28j60_lowpower(struct enc28j60_net *priv, bool is_low)
-{
-	if (netif_msg_drv(priv))
-		dev_dbg(&priv->spi->dev, "%s power...\n",
-				is_low ? "low" : "high");
-
-	mutex_lock(&priv->lock);
-	if (is_low) {
-		nolock_reg_bfclr(priv, ECON1, ECON1_RXEN);
-		poll_ready(priv, ESTAT, ESTAT_RXBUSY, 0);
-		poll_ready(priv, ECON1, ECON1_TXRTS, 0);
-		/* ECON2_VRPS was set during initialization */
-		nolock_reg_bfset(priv, ECON2, ECON2_PWRSV);
-	} else {
-		nolock_reg_bfclr(priv, ECON2, ECON2_PWRSV);
-		poll_ready(priv, ESTAT, ESTAT_CLKRDY, ESTAT_CLKRDY);
-		/* caller sets ECON1_RXEN */
-	}
-	mutex_unlock(&priv->lock);
-}
-
-static int enc28j60_hw_init(struct enc28j60_net *priv)
-{
-	u8 reg;
-
-	if (netif_msg_drv(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() - %s\n", __func__,
-			priv->full_duplex ? "FullDuplex" : "HalfDuplex");
-
-	mutex_lock(&priv->lock);
-	/* first reset the chip */
-	enc28j60_soft_reset(priv);
-	/* Clear ECON1 */
-	spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, ECON1, 0x00);
-	priv->bank = 0;
-	priv->hw_enable = false;
-	priv->tx_retry_count = 0;
-	priv->max_pk_counter = 0;
-	priv->rxfilter = RXFILTER_NORMAL;
-	/* enable address auto increment and voltage regulator powersave */
-	nolock_regb_write(priv, ECON2, ECON2_AUTOINC | ECON2_VRPS);
-
-	nolock_rxfifo_init(priv, RXSTART_INIT, RXEND_INIT);
-	nolock_txfifo_init(priv, TXSTART_INIT, TXEND_INIT);
-	mutex_unlock(&priv->lock);
-
-	/*
-	 * Check the RevID.
-	 * If it's 0x00 or 0xFF probably the enc28j60 is not mounted or
-	 * damaged
-	 */
-	reg = locked_regb_read(priv, EREVID);
-	if (netif_msg_drv(priv))
-		printk(KERN_INFO DRV_NAME ": chip RevID: 0x%02x\n", reg);
-	if (reg == 0x00 || reg == 0xff) {
-		if (netif_msg_drv(priv))
-			printk(KERN_DEBUG DRV_NAME ": %s() Invalid RevId %d\n",
-				__func__, reg);
-		return 0;
-	}
-
-	/* default filter mode: (unicast OR broadcast) AND crc valid */
-	locked_regb_write(priv, ERXFCON,
-			    ERXFCON_UCEN | ERXFCON_CRCEN | ERXFCON_BCEN);
-
-	/* enable MAC receive */
-	locked_regb_write(priv, MACON1,
-			    MACON1_MARXEN | MACON1_TXPAUS | MACON1_RXPAUS);
-	/* enable automatic padding and CRC operations */
-	if (priv->full_duplex) {
-		locked_regb_write(priv, MACON3,
-				    MACON3_PADCFG0 | MACON3_TXCRCEN |
-				    MACON3_FRMLNEN | MACON3_FULDPX);
-		/* set inter-frame gap (non-back-to-back) */
-		locked_regb_write(priv, MAIPGL, 0x12);
-		/* set inter-frame gap (back-to-back) */
-		locked_regb_write(priv, MABBIPG, 0x15);
-	} else {
-		locked_regb_write(priv, MACON3,
-				    MACON3_PADCFG0 | MACON3_TXCRCEN |
-				    MACON3_FRMLNEN);
-		locked_regb_write(priv, MACON4, 1 << 6);	/* DEFER bit */
-		/* set inter-frame gap (non-back-to-back) */
-		locked_regw_write(priv, MAIPGL, 0x0C12);
-		/* set inter-frame gap (back-to-back) */
-		locked_regb_write(priv, MABBIPG, 0x12);
-	}
-	/*
-	 * MACLCON1 (default)
-	 * MACLCON2 (default)
-	 * Set the maximum packet size which the controller will accept
-	 */
-	locked_regw_write(priv, MAMXFLL, MAX_FRAMELEN);
-
-	/* Configure LEDs */
-	if (!enc28j60_phy_write(priv, PHLCON, ENC28J60_LAMPS_MODE))
-		return 0;
-
-	if (priv->full_duplex) {
-		if (!enc28j60_phy_write(priv, PHCON1, PHCON1_PDPXMD))
-			return 0;
-		if (!enc28j60_phy_write(priv, PHCON2, 0x00))
-			return 0;
-	} else {
-		if (!enc28j60_phy_write(priv, PHCON1, 0x00))
-			return 0;
-		if (!enc28j60_phy_write(priv, PHCON2, PHCON2_HDLDIS))
-			return 0;
-	}
-	if (netif_msg_hw(priv))
-		enc28j60_dump_regs(priv, "Hw initialized.");
-
-	return 1;
-}
-
-static void enc28j60_hw_enable(struct enc28j60_net *priv)
-{
-	/* enable interrupts */
-	if (netif_msg_hw(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() enabling interrupts.\n",
-			__func__);
-
-	enc28j60_phy_write(priv, PHIE, PHIE_PGEIE | PHIE_PLNKIE);
-
-	mutex_lock(&priv->lock);
-	nolock_reg_bfclr(priv, EIR, EIR_DMAIF | EIR_LINKIF |
-			 EIR_TXIF | EIR_TXERIF | EIR_RXERIF | EIR_PKTIF);
-	nolock_regb_write(priv, EIE, EIE_INTIE | EIE_PKTIE | EIE_LINKIE |
-			  EIE_TXIE | EIE_TXERIE | EIE_RXERIE);
-
-	/* enable receive logic */
-	nolock_reg_bfset(priv, ECON1, ECON1_RXEN);
-	priv->hw_enable = true;
-	mutex_unlock(&priv->lock);
-}
-
-static void enc28j60_hw_disable(struct enc28j60_net *priv)
-{
-	mutex_lock(&priv->lock);
-	/* disable interrutps and packet reception */
-	nolock_regb_write(priv, EIE, 0x00);
-	nolock_reg_bfclr(priv, ECON1, ECON1_RXEN);
-	priv->hw_enable = false;
-	mutex_unlock(&priv->lock);
-}
-
-static int
-enc28j60_setlink(struct net_device *ndev, u8 autoneg, u16 speed, u8 duplex)
-{
-	struct enc28j60_net *priv = netdev_priv(ndev);
-	int ret = 0;
-
-	if (!priv->hw_enable) {
-		/* link is in low power mode now; duplex setting
-		 * will take effect on next enc28j60_hw_init().
-		 */
-		if (autoneg == AUTONEG_DISABLE && speed == SPEED_10)
-			priv->full_duplex = (duplex == DUPLEX_FULL);
-		else {
-			if (netif_msg_link(priv))
-				dev_warn(&ndev->dev,
-					"unsupported link setting\n");
-			ret = -EOPNOTSUPP;
-		}
-	} else {
-		if (netif_msg_link(priv))
-			dev_warn(&ndev->dev, "Warning: hw must be disabled "
-				"to set link mode\n");
-		ret = -EBUSY;
-	}
-	return ret;
-}
-
-/*
- * Read the Transmit Status Vector
- */
-static void enc28j60_read_tsv(struct enc28j60_net *priv, u8 tsv[TSV_SIZE])
-{
-	int endptr;
-
-	endptr = locked_regw_read(priv, ETXNDL);
-	if (netif_msg_hw(priv))
-		printk(KERN_DEBUG DRV_NAME ": reading TSV at addr:0x%04x\n",
-			 endptr + 1);
-	enc28j60_mem_read(priv, endptr + 1, TSV_SIZE, tsv);
-}
-
-static void enc28j60_dump_tsv(struct enc28j60_net *priv, const char *msg,
-				u8 tsv[TSV_SIZE])
-{
-	u16 tmp1, tmp2;
-
-	printk(KERN_DEBUG DRV_NAME ": %s - TSV:\n", msg);
-	tmp1 = tsv[1];
-	tmp1 <<= 8;
-	tmp1 |= tsv[0];
-
-	tmp2 = tsv[5];
-	tmp2 <<= 8;
-	tmp2 |= tsv[4];
-
-	printk(KERN_DEBUG DRV_NAME ": ByteCount: %d, CollisionCount: %d,"
-		" TotByteOnWire: %d\n", tmp1, tsv[2] & 0x0f, tmp2);
-	printk(KERN_DEBUG DRV_NAME ": TxDone: %d, CRCErr:%d, LenChkErr: %d,"
-		" LenOutOfRange: %d\n", TSV_GETBIT(tsv, TSV_TXDONE),
-		TSV_GETBIT(tsv, TSV_TXCRCERROR),
-		TSV_GETBIT(tsv, TSV_TXLENCHKERROR),
-		TSV_GETBIT(tsv, TSV_TXLENOUTOFRANGE));
-	printk(KERN_DEBUG DRV_NAME ": Multicast: %d, Broadcast: %d, "
-		"PacketDefer: %d, ExDefer: %d\n",
-		TSV_GETBIT(tsv, TSV_TXMULTICAST),
-		TSV_GETBIT(tsv, TSV_TXBROADCAST),
-		TSV_GETBIT(tsv, TSV_TXPACKETDEFER),
-		TSV_GETBIT(tsv, TSV_TXEXDEFER));
-	printk(KERN_DEBUG DRV_NAME ": ExCollision: %d, LateCollision: %d, "
-		 "Giant: %d, Underrun: %d\n",
-		 TSV_GETBIT(tsv, TSV_TXEXCOLLISION),
-		 TSV_GETBIT(tsv, TSV_TXLATECOLLISION),
-		 TSV_GETBIT(tsv, TSV_TXGIANT), TSV_GETBIT(tsv, TSV_TXUNDERRUN));
-	printk(KERN_DEBUG DRV_NAME ": ControlFrame: %d, PauseFrame: %d, "
-		 "BackPressApp: %d, VLanTagFrame: %d\n",
-		 TSV_GETBIT(tsv, TSV_TXCONTROLFRAME),
-		 TSV_GETBIT(tsv, TSV_TXPAUSEFRAME),
-		 TSV_GETBIT(tsv, TSV_BACKPRESSUREAPP),
-		 TSV_GETBIT(tsv, TSV_TXVLANTAGFRAME));
-}
-
-/*
- * Receive Status vector
- */
-static void enc28j60_dump_rsv(struct enc28j60_net *priv, const char *msg,
-			      u16 pk_ptr, int len, u16 sts)
-{
-	printk(KERN_DEBUG DRV_NAME ": %s - NextPk: 0x%04x - RSV:\n",
-		msg, pk_ptr);
-	printk(KERN_DEBUG DRV_NAME ": ByteCount: %d, DribbleNibble: %d\n", len,
-		 RSV_GETBIT(sts, RSV_DRIBBLENIBBLE));
-	printk(KERN_DEBUG DRV_NAME ": RxOK: %d, CRCErr:%d, LenChkErr: %d,"
-		 " LenOutOfRange: %d\n", RSV_GETBIT(sts, RSV_RXOK),
-		 RSV_GETBIT(sts, RSV_CRCERROR),
-		 RSV_GETBIT(sts, RSV_LENCHECKERR),
-		 RSV_GETBIT(sts, RSV_LENOUTOFRANGE));
-	printk(KERN_DEBUG DRV_NAME ": Multicast: %d, Broadcast: %d, "
-		 "LongDropEvent: %d, CarrierEvent: %d\n",
-		 RSV_GETBIT(sts, RSV_RXMULTICAST),
-		 RSV_GETBIT(sts, RSV_RXBROADCAST),
-		 RSV_GETBIT(sts, RSV_RXLONGEVDROPEV),
-		 RSV_GETBIT(sts, RSV_CARRIEREV));
-	printk(KERN_DEBUG DRV_NAME ": ControlFrame: %d, PauseFrame: %d,"
-		 " UnknownOp: %d, VLanTagFrame: %d\n",
-		 RSV_GETBIT(sts, RSV_RXCONTROLFRAME),
-		 RSV_GETBIT(sts, RSV_RXPAUSEFRAME),
-		 RSV_GETBIT(sts, RSV_RXUNKNOWNOPCODE),
-		 RSV_GETBIT(sts, RSV_RXTYPEVLAN));
-}
-
-static void dump_packet(const char *msg, int len, const char *data)
-{
-	printk(KERN_DEBUG DRV_NAME ": %s - packet len:%d\n", msg, len);
-	print_hex_dump(KERN_DEBUG, "pk data: ", DUMP_PREFIX_OFFSET, 16, 1,
-			data, len, true);
-}
-
-/*
- * Hardware receive function.
- * Read the buffer memory, update the FIFO pointer to free the buffer,
- * check the status vector and decrement the packet counter.
- */
-static void enc28j60_hw_rx(struct net_device *ndev)
-{
-	struct enc28j60_net *priv = netdev_priv(ndev);
-	struct sk_buff *skb = NULL;
-	u16 erxrdpt, next_packet, rxstat;
-	u8 rsv[RSV_SIZE];
-	int len;
-
-	if (netif_msg_rx_status(priv))
-		printk(KERN_DEBUG DRV_NAME ": RX pk_addr:0x%04x\n",
-			priv->next_pk_ptr);
-
-	if (unlikely(priv->next_pk_ptr > RXEND_INIT)) {
-		if (netif_msg_rx_err(priv))
-			dev_err(&ndev->dev,
-				"%s() Invalid packet address!! 0x%04x\n",
-				__func__, priv->next_pk_ptr);
-		/* packet address corrupted: reset RX logic */
-		mutex_lock(&priv->lock);
-		nolock_reg_bfclr(priv, ECON1, ECON1_RXEN);
-		nolock_reg_bfset(priv, ECON1, ECON1_RXRST);
-		nolock_reg_bfclr(priv, ECON1, ECON1_RXRST);
-		nolock_rxfifo_init(priv, RXSTART_INIT, RXEND_INIT);
-		nolock_reg_bfclr(priv, EIR, EIR_RXERIF);
-		nolock_reg_bfset(priv, ECON1, ECON1_RXEN);
-		mutex_unlock(&priv->lock);
-		ndev->stats.rx_errors++;
-		return;
-	}
-	/* Read next packet pointer and rx status vector */
-	enc28j60_mem_read(priv, priv->next_pk_ptr, sizeof(rsv), rsv);
-
-	next_packet = rsv[1];
-	next_packet <<= 8;
-	next_packet |= rsv[0];
-
-	len = rsv[3];
-	len <<= 8;
-	len |= rsv[2];
-
-	rxstat = rsv[5];
-	rxstat <<= 8;
-	rxstat |= rsv[4];
-
-	if (netif_msg_rx_status(priv))
-		enc28j60_dump_rsv(priv, __func__, next_packet, len, rxstat);
-
-	if (!RSV_GETBIT(rxstat, RSV_RXOK) || len > MAX_FRAMELEN) {
-		if (netif_msg_rx_err(priv))
-			dev_err(&ndev->dev, "Rx Error (%04x)\n", rxstat);
-		ndev->stats.rx_errors++;
-		if (RSV_GETBIT(rxstat, RSV_CRCERROR))
-			ndev->stats.rx_crc_errors++;
-		if (RSV_GETBIT(rxstat, RSV_LENCHECKERR))
-			ndev->stats.rx_frame_errors++;
-		if (len > MAX_FRAMELEN)
-			ndev->stats.rx_over_errors++;
-	} else {
-		skb = dev_alloc_skb(len + NET_IP_ALIGN);
-		if (!skb) {
-			if (netif_msg_rx_err(priv))
-				dev_err(&ndev->dev,
-					"out of memory for Rx'd frame\n");
-			ndev->stats.rx_dropped++;
-		} else {
-			skb->dev = ndev;
-			skb_reserve(skb, NET_IP_ALIGN);
-			/* copy the packet from the receive buffer */
-			enc28j60_mem_read(priv,
-				rx_packet_start(priv->next_pk_ptr),
-				len, skb_put(skb, len));
-			if (netif_msg_pktdata(priv))
-				dump_packet(__func__, skb->len, skb->data);
-			skb->protocol = eth_type_trans(skb, ndev);
-			/* update statistics */
-			ndev->stats.rx_packets++;
-			ndev->stats.rx_bytes += len;
-			netif_rx_ni(skb);
-		}
-	}
-	/*
-	 * Move the RX read pointer to the start of the next
-	 * received packet.
-	 * This frees the memory we just read out
-	 */
-	erxrdpt = erxrdpt_workaround(next_packet, RXSTART_INIT, RXEND_INIT);
-	if (netif_msg_hw(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() ERXRDPT:0x%04x\n",
-			__func__, erxrdpt);
-
-	mutex_lock(&priv->lock);
-	nolock_regw_write(priv, ERXRDPTL, erxrdpt);
-#ifdef CONFIG_ENC28J60_WRITEVERIFY
-	if (netif_msg_drv(priv)) {
-		u16 reg;
-		reg = nolock_regw_read(priv, ERXRDPTL);
-		if (reg != erxrdpt)
-			printk(KERN_DEBUG DRV_NAME ": %s() ERXRDPT verify "
-				"error (0x%04x - 0x%04x)\n", __func__,
-				reg, erxrdpt);
-	}
-#endif
-	priv->next_pk_ptr = next_packet;
-	/* we are done with this packet, decrement the packet counter */
-	nolock_reg_bfset(priv, ECON2, ECON2_PKTDEC);
-	mutex_unlock(&priv->lock);
-}
-
-/*
- * Calculate free space in RxFIFO
- */
-static int enc28j60_get_free_rxfifo(struct enc28j60_net *priv)
-{
-	int epkcnt, erxst, erxnd, erxwr, erxrd;
-	int free_space;
-
-	mutex_lock(&priv->lock);
-	epkcnt = nolock_regb_read(priv, EPKTCNT);
-	if (epkcnt >= 255)
-		free_space = -1;
-	else {
-		erxst = nolock_regw_read(priv, ERXSTL);
-		erxnd = nolock_regw_read(priv, ERXNDL);
-		erxwr = nolock_regw_read(priv, ERXWRPTL);
-		erxrd = nolock_regw_read(priv, ERXRDPTL);
-
-		if (erxwr > erxrd)
-			free_space = (erxnd - erxst) - (erxwr - erxrd);
-		else if (erxwr == erxrd)
-			free_space = (erxnd - erxst);
-		else
-			free_space = erxrd - erxwr - 1;
-	}
-	mutex_unlock(&priv->lock);
-	if (netif_msg_rx_status(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() free_space = %d\n",
-			__func__, free_space);
-	return free_space;
-}
-
-/*
- * Access the PHY to determine link status
- */
-static void enc28j60_check_link_status(struct net_device *ndev)
-{
-	struct enc28j60_net *priv = netdev_priv(ndev);
-	u16 reg;
-	int duplex;
-
-	reg = enc28j60_phy_read(priv, PHSTAT2);
-	if (netif_msg_hw(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() PHSTAT1: %04x, "
-			"PHSTAT2: %04x\n", __func__,
-			enc28j60_phy_read(priv, PHSTAT1), reg);
-	duplex = reg & PHSTAT2_DPXSTAT;
-
-	if (reg & PHSTAT2_LSTAT) {
-		netif_carrier_on(ndev);
-		if (netif_msg_ifup(priv))
-			dev_info(&ndev->dev, "link up - %s\n",
-				duplex ? "Full duplex" : "Half duplex");
-	} else {
-		if (netif_msg_ifdown(priv))
-			dev_info(&ndev->dev, "link down\n");
-		netif_carrier_off(ndev);
-	}
-}
-
-static void enc28j60_tx_clear(struct net_device *ndev, bool err)
-{
-	struct enc28j60_net *priv = netdev_priv(ndev);
-
-	if (err)
-		ndev->stats.tx_errors++;
-	else
-		ndev->stats.tx_packets++;
-
-	if (priv->tx_skb) {
-		if (!err)
-			ndev->stats.tx_bytes += priv->tx_skb->len;
-		dev_kfree_skb(priv->tx_skb);
-		priv->tx_skb = NULL;
-	}
-	locked_reg_bfclr(priv, ECON1, ECON1_TXRTS);
-	netif_wake_queue(ndev);
-}
-
-/*
- * RX handler
- * ignore PKTIF because is unreliable! (look at the errata datasheet)
- * check EPKTCNT is the suggested workaround.
- * We don't need to clear interrupt flag, automatically done when
- * enc28j60_hw_rx() decrements the packet counter.
- * Returns how many packet processed.
- */
-static int enc28j60_rx_interrupt(struct net_device *ndev)
-{
-	struct enc28j60_net *priv = netdev_priv(ndev);
-	int pk_counter, ret;
-
-	pk_counter = locked_regb_read(priv, EPKTCNT);
-	if (pk_counter && netif_msg_intr(priv))
-		printk(KERN_DEBUG DRV_NAME ": intRX, pk_cnt: %d\n", pk_counter);
-	if (pk_counter > priv->max_pk_counter) {
-		/* update statistics */
-		priv->max_pk_counter = pk_counter;
-		if (netif_msg_rx_status(priv) && priv->max_pk_counter > 1)
-			printk(KERN_DEBUG DRV_NAME ": RX max_pk_cnt: %d\n",
-				priv->max_pk_counter);
-	}
-	ret = pk_counter;
-	while (pk_counter-- > 0)
-		enc28j60_hw_rx(ndev);
-
-	return ret;
-}
-
-static void enc28j60_irq_work_handler(struct work_struct *work)
-{
-	struct enc28j60_net *priv =
-		container_of(work, struct enc28j60_net, irq_work);
-	struct net_device *ndev = priv->netdev;
-	int intflags, loop;
-
-	if (netif_msg_intr(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__);
-	/* disable further interrupts */
-	locked_reg_bfclr(priv, EIE, EIE_INTIE);
-
-	do {
-		loop = 0;
-		intflags = locked_regb_read(priv, EIR);
-		/* DMA interrupt handler (not currently used) */
-		if ((intflags & EIR_DMAIF) != 0) {
-			loop++;
-			if (netif_msg_intr(priv))
-				printk(KERN_DEBUG DRV_NAME
-					": intDMA(%d)\n", loop);
-			locked_reg_bfclr(priv, EIR, EIR_DMAIF);
-		}
-		/* LINK changed handler */
-		if ((intflags & EIR_LINKIF) != 0) {
-			loop++;
-			if (netif_msg_intr(priv))
-				printk(KERN_DEBUG DRV_NAME
-					": intLINK(%d)\n", loop);
-			enc28j60_check_link_status(ndev);
-			/* read PHIR to clear the flag */
-			enc28j60_phy_read(priv, PHIR);
-		}
-		/* TX complete handler */
-		if ((intflags & EIR_TXIF) != 0) {
-			bool err = false;
-			loop++;
-			if (netif_msg_intr(priv))
-				printk(KERN_DEBUG DRV_NAME
-					": intTX(%d)\n", loop);
-			priv->tx_retry_count = 0;
-			if (locked_regb_read(priv, ESTAT) & ESTAT_TXABRT) {
-				if (netif_msg_tx_err(priv))
-					dev_err(&ndev->dev,
-						"Tx Error (aborted)\n");
-				err = true;
-			}
-			if (netif_msg_tx_done(priv)) {
-				u8 tsv[TSV_SIZE];
-				enc28j60_read_tsv(priv, tsv);
-				enc28j60_dump_tsv(priv, "Tx Done", tsv);
-			}
-			enc28j60_tx_clear(ndev, err);
-			locked_reg_bfclr(priv, EIR, EIR_TXIF);
-		}
-		/* TX Error handler */
-		if ((intflags & EIR_TXERIF) != 0) {
-			u8 tsv[TSV_SIZE];
-
-			loop++;
-			if (netif_msg_intr(priv))
-				printk(KERN_DEBUG DRV_NAME
-					": intTXErr(%d)\n", loop);
-			locked_reg_bfclr(priv, ECON1, ECON1_TXRTS);
-			enc28j60_read_tsv(priv, tsv);
-			if (netif_msg_tx_err(priv))
-				enc28j60_dump_tsv(priv, "Tx Error", tsv);
-			/* Reset TX logic */
-			mutex_lock(&priv->lock);
-			nolock_reg_bfset(priv, ECON1, ECON1_TXRST);
-			nolock_reg_bfclr(priv, ECON1, ECON1_TXRST);
-			nolock_txfifo_init(priv, TXSTART_INIT, TXEND_INIT);
-			mutex_unlock(&priv->lock);
-			/* Transmit Late collision check for retransmit */
-			if (TSV_GETBIT(tsv, TSV_TXLATECOLLISION)) {
-				if (netif_msg_tx_err(priv))
-					printk(KERN_DEBUG DRV_NAME
-						": LateCollision TXErr (%d)\n",
-						priv->tx_retry_count);
-				if (priv->tx_retry_count++ < MAX_TX_RETRYCOUNT)
-					locked_reg_bfset(priv, ECON1,
-							   ECON1_TXRTS);
-				else
-					enc28j60_tx_clear(ndev, true);
-			} else
-				enc28j60_tx_clear(ndev, true);
-			locked_reg_bfclr(priv, EIR, EIR_TXERIF);
-		}
-		/* RX Error handler */
-		if ((intflags & EIR_RXERIF) != 0) {
-			loop++;
-			if (netif_msg_intr(priv))
-				printk(KERN_DEBUG DRV_NAME
-					": intRXErr(%d)\n", loop);
-			/* Check free FIFO space to flag RX overrun */
-			if (enc28j60_get_free_rxfifo(priv) <= 0) {
-				if (netif_msg_rx_err(priv))
-					printk(KERN_DEBUG DRV_NAME
-						": RX Overrun\n");
-				ndev->stats.rx_dropped++;
-			}
-			locked_reg_bfclr(priv, EIR, EIR_RXERIF);
-		}
-		/* RX handler */
-		if (enc28j60_rx_interrupt(ndev))
-			loop++;
-	} while (loop);
-
-	/* re-enable interrupts */
-	locked_reg_bfset(priv, EIE, EIE_INTIE);
-	if (netif_msg_intr(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() exit\n", __func__);
-}
-
-/*
- * Hardware transmit function.
- * Fill the buffer memory and send the contents of the transmit buffer
- * onto the network
- */
-static void enc28j60_hw_tx(struct enc28j60_net *priv)
-{
-	if (netif_msg_tx_queued(priv))
-		printk(KERN_DEBUG DRV_NAME
-			": Tx Packet Len:%d\n", priv->tx_skb->len);
-
-	if (netif_msg_pktdata(priv))
-		dump_packet(__func__,
-			    priv->tx_skb->len, priv->tx_skb->data);
-	enc28j60_packet_write(priv, priv->tx_skb->len, priv->tx_skb->data);
-
-#ifdef CONFIG_ENC28J60_WRITEVERIFY
-	/* readback and verify written data */
-	if (netif_msg_drv(priv)) {
-		int test_len, k;
-		u8 test_buf[64]; /* limit the test to the first 64 bytes */
-		int okflag;
-
-		test_len = priv->tx_skb->len;
-		if (test_len > sizeof(test_buf))
-			test_len = sizeof(test_buf);
-
-		/* + 1 to skip control byte */
-		enc28j60_mem_read(priv, TXSTART_INIT + 1, test_len, test_buf);
-		okflag = 1;
-		for (k = 0; k < test_len; k++) {
-			if (priv->tx_skb->data[k] != test_buf[k]) {
-				printk(KERN_DEBUG DRV_NAME
-					 ": Error, %d location differ: "
-					 "0x%02x-0x%02x\n", k,
-					 priv->tx_skb->data[k], test_buf[k]);
-				okflag = 0;
-			}
-		}
-		if (!okflag)
-			printk(KERN_DEBUG DRV_NAME ": Tx write buffer, "
-				"verify ERROR!\n");
-	}
-#endif
-	/* set TX request flag */
-	locked_reg_bfset(priv, ECON1, ECON1_TXRTS);
-}
-
-static netdev_tx_t enc28j60_send_packet(struct sk_buff *skb,
-					struct net_device *dev)
-{
-	struct enc28j60_net *priv = netdev_priv(dev);
-
-	if (netif_msg_tx_queued(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__);
-
-	/* If some error occurs while trying to transmit this
-	 * packet, you should return '1' from this function.
-	 * In such a case you _may not_ do anything to the
-	 * SKB, it is still owned by the network queueing
-	 * layer when an error is returned.  This means you
-	 * may not modify any SKB fields, you may not free
-	 * the SKB, etc.
-	 */
-	netif_stop_queue(dev);
-
-	/* Remember the skb for deferred processing */
-	priv->tx_skb = skb;
-	schedule_work(&priv->tx_work);
-
-	return NETDEV_TX_OK;
-}
-
-static void enc28j60_tx_work_handler(struct work_struct *work)
-{
-	struct enc28j60_net *priv =
-		container_of(work, struct enc28j60_net, tx_work);
-
-	/* actual delivery of data */
-	enc28j60_hw_tx(priv);
-}
-
-static irqreturn_t enc28j60_irq(int irq, void *dev_id)
-{
-	struct enc28j60_net *priv = dev_id;
-
-	/*
-	 * Can't do anything in interrupt context because we need to
-	 * block (spi_sync() is blocking) so fire of the interrupt
-	 * handling workqueue.
-	 * Remember that we access enc28j60 registers through SPI bus
-	 * via spi_sync() call.
-	 */
-	schedule_work(&priv->irq_work);
-
-	return IRQ_HANDLED;
-}
-
-static void enc28j60_tx_timeout(struct net_device *ndev)
-{
-	struct enc28j60_net *priv = netdev_priv(ndev);
-
-	if (netif_msg_timer(priv))
-		dev_err(&ndev->dev, DRV_NAME " tx timeout\n");
-
-	ndev->stats.tx_errors++;
-	/* can't restart safely under softirq */
-	schedule_work(&priv->restart_work);
-}
-
-/*
- * Open/initialize the board. This is called (in the current kernel)
- * sometime after booting when the 'ifconfig' program is run.
- *
- * This routine should set everything up anew at each open, even
- * registers that "should" only need to be set once at boot, so that
- * there is non-reboot way to recover if something goes wrong.
- */
-static int enc28j60_net_open(struct net_device *dev)
-{
-	struct enc28j60_net *priv = netdev_priv(dev);
-
-	if (netif_msg_drv(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__);
-
-	if (!is_valid_ether_addr(dev->dev_addr)) {
-		if (netif_msg_ifup(priv))
-			dev_err(&dev->dev, "invalid MAC address %pM\n",
-				dev->dev_addr);
-		return -EADDRNOTAVAIL;
-	}
-	/* Reset the hardware here (and take it out of low power mode) */
-	enc28j60_lowpower(priv, false);
-	enc28j60_hw_disable(priv);
-	if (!enc28j60_hw_init(priv)) {
-		if (netif_msg_ifup(priv))
-			dev_err(&dev->dev, "hw_reset() failed\n");
-		return -EINVAL;
-	}
-	/* Update the MAC address (in case user has changed it) */
-	enc28j60_set_hw_macaddr(dev);
-	/* Enable interrupts */
-	enc28j60_hw_enable(priv);
-	/* check link status */
-	enc28j60_check_link_status(dev);
-	/* We are now ready to accept transmit requests from
-	 * the queueing layer of the networking.
-	 */
-	netif_start_queue(dev);
-
-	return 0;
-}
-
-/* The inverse routine to net_open(). */
-static int enc28j60_net_close(struct net_device *dev)
-{
-	struct enc28j60_net *priv = netdev_priv(dev);
-
-	if (netif_msg_drv(priv))
-		printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__);
-
-	enc28j60_hw_disable(priv);
-	enc28j60_lowpower(priv, true);
-	netif_stop_queue(dev);
-
-	return 0;
-}
-
-/*
- * Set or clear the multicast filter for this adapter
- * num_addrs == -1	Promiscuous mode, receive all packets
- * num_addrs == 0	Normal mode, filter out multicast packets
- * num_addrs > 0	Multicast mode, receive normal and MC packets
- */
-static void enc28j60_set_multicast_list(struct net_device *dev)
-{
-	struct enc28j60_net *priv = netdev_priv(dev);
-	int oldfilter = priv->rxfilter;
-
-	if (dev->flags & IFF_PROMISC) {
-		if (netif_msg_link(priv))
-			dev_info(&dev->dev, "promiscuous mode\n");
-		priv->rxfilter = RXFILTER_PROMISC;
-	} else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) {
-		if (netif_msg_link(priv))
-			dev_info(&dev->dev, "%smulticast mode\n",
-				(dev->flags & IFF_ALLMULTI) ? "all-" : "");
-		priv->rxfilter = RXFILTER_MULTI;
-	} else {
-		if (netif_msg_link(priv))
-			dev_info(&dev->dev, "normal mode\n");
-		priv->rxfilter = RXFILTER_NORMAL;
-	}
-
-	if (oldfilter != priv->rxfilter)
-		schedule_work(&priv->setrx_work);
-}
-
-static void enc28j60_setrx_work_handler(struct work_struct *work)
-{
-	struct enc28j60_net *priv =
-		container_of(work, struct enc28j60_net, setrx_work);
-
-	if (priv->rxfilter == RXFILTER_PROMISC) {
-		if (netif_msg_drv(priv))
-			printk(KERN_DEBUG DRV_NAME ": promiscuous mode\n");
-		locked_regb_write(priv, ERXFCON, 0x00);
-	} else if (priv->rxfilter == RXFILTER_MULTI) {
-		if (netif_msg_drv(priv))
-			printk(KERN_DEBUG DRV_NAME ": multicast mode\n");
-		locked_regb_write(priv, ERXFCON,
-					ERXFCON_UCEN | ERXFCON_CRCEN |
-					ERXFCON_BCEN | ERXFCON_MCEN);
-	} else {
-		if (netif_msg_drv(priv))
-			printk(KERN_DEBUG DRV_NAME ": normal mode\n");
-		locked_regb_write(priv, ERXFCON,
-					ERXFCON_UCEN | ERXFCON_CRCEN |
-					ERXFCON_BCEN);
-	}
-}
-
-static void enc28j60_restart_work_handler(struct work_struct *work)
-{
-	struct enc28j60_net *priv =
-			container_of(work, struct enc28j60_net, restart_work);
-	struct net_device *ndev = priv->netdev;
-	int ret;
-
-	rtnl_lock();
-	if (netif_running(ndev)) {
-		enc28j60_net_close(ndev);
-		ret = enc28j60_net_open(ndev);
-		if (unlikely(ret)) {
-			dev_info(&ndev->dev, " could not restart %d\n", ret);
-			dev_close(ndev);
-		}
-	}
-	rtnl_unlock();
-}
-
-/* ......................... ETHTOOL SUPPORT ........................... */
-
-static void
-enc28j60_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
-{
-	strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
-	strlcpy(info->version, DRV_VERSION, sizeof(info->version));
-	strlcpy(info->bus_info,
-		dev_name(dev->dev.parent), sizeof(info->bus_info));
-}
-
-static int
-enc28j60_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	struct enc28j60_net *priv = netdev_priv(dev);
-
-	cmd->transceiver = XCVR_INTERNAL;
-	cmd->supported	= SUPPORTED_10baseT_Half
-			| SUPPORTED_10baseT_Full
-			| SUPPORTED_TP;
-	ethtool_cmd_speed_set(cmd,  SPEED_10);
-	cmd->duplex	= priv->full_duplex ? DUPLEX_FULL : DUPLEX_HALF;
-	cmd->port	= PORT_TP;
-	cmd->autoneg	= AUTONEG_DISABLE;
-
-	return 0;
-}
-
-static int
-enc28j60_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	return enc28j60_setlink(dev, cmd->autoneg,
-				ethtool_cmd_speed(cmd), cmd->duplex);
-}
-
-static u32 enc28j60_get_msglevel(struct net_device *dev)
-{
-	struct enc28j60_net *priv = netdev_priv(dev);
-	return priv->msg_enable;
-}
-
-static void enc28j60_set_msglevel(struct net_device *dev, u32 val)
-{
-	struct enc28j60_net *priv = netdev_priv(dev);
-	priv->msg_enable = val;
-}
-
-static const struct ethtool_ops enc28j60_ethtool_ops = {
-	.get_settings	= enc28j60_get_settings,
-	.set_settings	= enc28j60_set_settings,
-	.get_drvinfo	= enc28j60_get_drvinfo,
-	.get_msglevel	= enc28j60_get_msglevel,
-	.set_msglevel	= enc28j60_set_msglevel,
-};
-
-static int enc28j60_chipset_init(struct net_device *dev)
-{
-	struct enc28j60_net *priv = netdev_priv(dev);
-
-	return enc28j60_hw_init(priv);
-}
-
-static const struct net_device_ops enc28j60_netdev_ops = {
-	.ndo_open		= enc28j60_net_open,
-	.ndo_stop		= enc28j60_net_close,
-	.ndo_start_xmit		= enc28j60_send_packet,
-	.ndo_set_multicast_list = enc28j60_set_multicast_list,
-	.ndo_set_mac_address	= enc28j60_set_mac_address,
-	.ndo_tx_timeout		= enc28j60_tx_timeout,
-	.ndo_change_mtu		= eth_change_mtu,
-	.ndo_validate_addr	= eth_validate_addr,
-};
-
-static int __devinit enc28j60_probe(struct spi_device *spi)
-{
-	struct net_device *dev;
-	struct enc28j60_net *priv;
-	int ret = 0;
-
-	if (netif_msg_drv(&debug))
-		dev_info(&spi->dev, DRV_NAME " Ethernet driver %s loaded\n",
-			DRV_VERSION);
-
-	dev = alloc_etherdev(sizeof(struct enc28j60_net));
-	if (!dev) {
-		if (netif_msg_drv(&debug))
-			dev_err(&spi->dev, DRV_NAME
-				": unable to alloc new ethernet\n");
-		ret = -ENOMEM;
-		goto error_alloc;
-	}
-	priv = netdev_priv(dev);
-
-	priv->netdev = dev;	/* priv to netdev reference */
-	priv->spi = spi;	/* priv to spi reference */
-	priv->msg_enable = netif_msg_init(debug.msg_enable,
-						ENC28J60_MSG_DEFAULT);
-	mutex_init(&priv->lock);
-	INIT_WORK(&priv->tx_work, enc28j60_tx_work_handler);
-	INIT_WORK(&priv->setrx_work, enc28j60_setrx_work_handler);
-	INIT_WORK(&priv->irq_work, enc28j60_irq_work_handler);
-	INIT_WORK(&priv->restart_work, enc28j60_restart_work_handler);
-	dev_set_drvdata(&spi->dev, priv);	/* spi to priv reference */
-	SET_NETDEV_DEV(dev, &spi->dev);
-
-	if (!enc28j60_chipset_init(dev)) {
-		if (netif_msg_probe(priv))
-			dev_info(&spi->dev, DRV_NAME " chip not found\n");
-		ret = -EIO;
-		goto error_irq;
-	}
-	random_ether_addr(dev->dev_addr);
-	enc28j60_set_hw_macaddr(dev);
-
-	/* Board setup must set the relevant edge trigger type;
-	 * level triggers won't currently work.
-	 */
-	ret = request_irq(spi->irq, enc28j60_irq, 0, DRV_NAME, priv);
-	if (ret < 0) {
-		if (netif_msg_probe(priv))
-			dev_err(&spi->dev, DRV_NAME ": request irq %d failed "
-				"(ret = %d)\n", spi->irq, ret);
-		goto error_irq;
-	}
-
-	dev->if_port = IF_PORT_10BASET;
-	dev->irq = spi->irq;
-	dev->netdev_ops = &enc28j60_netdev_ops;
-	dev->watchdog_timeo = TX_TIMEOUT;
-	SET_ETHTOOL_OPS(dev, &enc28j60_ethtool_ops);
-
-	enc28j60_lowpower(priv, true);
-
-	ret = register_netdev(dev);
-	if (ret) {
-		if (netif_msg_probe(priv))
-			dev_err(&spi->dev, "register netdev " DRV_NAME
-				" failed (ret = %d)\n", ret);
-		goto error_register;
-	}
-	dev_info(&dev->dev, DRV_NAME " driver registered\n");
-
-	return 0;
-
-error_register:
-	free_irq(spi->irq, priv);
-error_irq:
-	free_netdev(dev);
-error_alloc:
-	return ret;
-}
-
-static int __devexit enc28j60_remove(struct spi_device *spi)
-{
-	struct enc28j60_net *priv = dev_get_drvdata(&spi->dev);
-
-	if (netif_msg_drv(priv))
-		printk(KERN_DEBUG DRV_NAME ": remove\n");
-
-	unregister_netdev(priv->netdev);
-	free_irq(spi->irq, priv);
-	free_netdev(priv->netdev);
-
-	return 0;
-}
-
-static struct spi_driver enc28j60_driver = {
-	.driver = {
-		   .name = DRV_NAME,
-		   .owner = THIS_MODULE,
-	 },
-	.probe = enc28j60_probe,
-	.remove = __devexit_p(enc28j60_remove),
-};
-
-static int __init enc28j60_init(void)
-{
-	msec20_to_jiffies = msecs_to_jiffies(20);
-
-	return spi_register_driver(&enc28j60_driver);
-}
-
-module_init(enc28j60_init);
-
-static void __exit enc28j60_exit(void)
-{
-	spi_unregister_driver(&enc28j60_driver);
-}
-
-module_exit(enc28j60_exit);
-
-MODULE_DESCRIPTION(DRV_NAME " ethernet driver");
-MODULE_AUTHOR("Claudio Lanconelli <lanconelli.claudio@eptar.com>");
-MODULE_LICENSE("GPL");
-module_param_named(debug, debug.msg_enable, int, 0);
-MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., ffff=all)");
-MODULE_ALIAS("spi:" DRV_NAME);