greth: Move the Aeroflex Gaisler driver

Move the Aeroflex Gaisler driver into drivers/net/ethernet/aeroflex/
and make the necessary Kconfig and Makefile changes.

CC: Kristoffer Glembo <kristoffer@gaisler.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 1637 deletions

diff --git a/drivers/net/greth.c b/drivers/net/greth.c
deleted file mode 100644
index 16ce45c11934..000000000000
--- a/drivers/net/greth.c
+++ /dev/null
@@ -1,1637 +0,0 @@
-/*
- * Aeroflex Gaisler GRETH 10/100/1G Ethernet MAC.
- *
- * 2005-2010 (c) Aeroflex Gaisler AB
- *
- * This driver supports GRETH 10/100 and GRETH 10/100/1G Ethernet MACs
- * available in the GRLIB VHDL IP core library.
- *
- * Full documentation of both cores can be found here:
- * http://www.gaisler.com/products/grlib/grip.pdf
- *
- * The Gigabit version supports scatter/gather DMA, any alignment of
- * buffers and checksum offloading.
- *
- * 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.
- *
- * Contributors: Kristoffer Glembo
- *               Daniel Hellstrom
- *               Marko Isomaki
- */
-
-#include <linux/dma-mapping.h>
-#include <linux/module.h>
-#include <linux/uaccess.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/skbuff.h>
-#include <linux/io.h>
-#include <linux/crc32.h>
-#include <linux/mii.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
-#include <linux/slab.h>
-#include <asm/cacheflush.h>
-#include <asm/byteorder.h>
-
-#ifdef CONFIG_SPARC
-#include <asm/idprom.h>
-#endif
-
-#include "greth.h"
-
-#define GRETH_DEF_MSG_ENABLE	  \
-	(NETIF_MSG_DRV		| \
-	 NETIF_MSG_PROBE	| \
-	 NETIF_MSG_LINK		| \
-	 NETIF_MSG_IFDOWN	| \
-	 NETIF_MSG_IFUP		| \
-	 NETIF_MSG_RX_ERR	| \
-	 NETIF_MSG_TX_ERR)
-
-static int greth_debug = -1;	/* -1 == use GRETH_DEF_MSG_ENABLE as value */
-module_param(greth_debug, int, 0);
-MODULE_PARM_DESC(greth_debug, "GRETH bitmapped debugging message enable value");
-
-/* Accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */
-static int macaddr[6];
-module_param_array(macaddr, int, NULL, 0);
-MODULE_PARM_DESC(macaddr, "GRETH Ethernet MAC address");
-
-static int greth_edcl = 1;
-module_param(greth_edcl, int, 0);
-MODULE_PARM_DESC(greth_edcl, "GRETH EDCL usage indicator. Set to 1 if EDCL is used.");
-
-static int greth_open(struct net_device *dev);
-static netdev_tx_t greth_start_xmit(struct sk_buff *skb,
-	   struct net_device *dev);
-static netdev_tx_t greth_start_xmit_gbit(struct sk_buff *skb,
-	   struct net_device *dev);
-static int greth_rx(struct net_device *dev, int limit);
-static int greth_rx_gbit(struct net_device *dev, int limit);
-static void greth_clean_tx(struct net_device *dev);
-static void greth_clean_tx_gbit(struct net_device *dev);
-static irqreturn_t greth_interrupt(int irq, void *dev_id);
-static int greth_close(struct net_device *dev);
-static int greth_set_mac_add(struct net_device *dev, void *p);
-static void greth_set_multicast_list(struct net_device *dev);
-
-#define GRETH_REGLOAD(a)	    (be32_to_cpu(__raw_readl(&(a))))
-#define GRETH_REGSAVE(a, v)         (__raw_writel(cpu_to_be32(v), &(a)))
-#define GRETH_REGORIN(a, v)         (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) | (v))))
-#define GRETH_REGANDIN(a, v)        (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) & (v))))
-
-#define NEXT_TX(N)      (((N) + 1) & GRETH_TXBD_NUM_MASK)
-#define SKIP_TX(N, C)   (((N) + C) & GRETH_TXBD_NUM_MASK)
-#define NEXT_RX(N)      (((N) + 1) & GRETH_RXBD_NUM_MASK)
-
-static void greth_print_rx_packet(void *addr, int len)
-{
-	print_hex_dump(KERN_DEBUG, "RX: ", DUMP_PREFIX_OFFSET, 16, 1,
-			addr, len, true);
-}
-
-static void greth_print_tx_packet(struct sk_buff *skb)
-{
-	int i;
-	int length;
-
-	if (skb_shinfo(skb)->nr_frags == 0)
-		length = skb->len;
-	else
-		length = skb_headlen(skb);
-
-	print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1,
-			skb->data, length, true);
-
-	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
-
-		print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1,
-			       phys_to_virt(page_to_phys(skb_shinfo(skb)->frags[i].page)) +
-			       skb_shinfo(skb)->frags[i].page_offset,
-			       length, true);
-	}
-}
-
-static inline void greth_enable_tx(struct greth_private *greth)
-{
-	wmb();
-	GRETH_REGORIN(greth->regs->control, GRETH_TXEN);
-}
-
-static inline void greth_disable_tx(struct greth_private *greth)
-{
-	GRETH_REGANDIN(greth->regs->control, ~GRETH_TXEN);
-}
-
-static inline void greth_enable_rx(struct greth_private *greth)
-{
-	wmb();
-	GRETH_REGORIN(greth->regs->control, GRETH_RXEN);
-}
-
-static inline void greth_disable_rx(struct greth_private *greth)
-{
-	GRETH_REGANDIN(greth->regs->control, ~GRETH_RXEN);
-}
-
-static inline void greth_enable_irqs(struct greth_private *greth)
-{
-	GRETH_REGORIN(greth->regs->control, GRETH_RXI | GRETH_TXI);
-}
-
-static inline void greth_disable_irqs(struct greth_private *greth)
-{
-	GRETH_REGANDIN(greth->regs->control, ~(GRETH_RXI|GRETH_TXI));
-}
-
-static inline void greth_write_bd(u32 *bd, u32 val)
-{
-	__raw_writel(cpu_to_be32(val), bd);
-}
-
-static inline u32 greth_read_bd(u32 *bd)
-{
-	return be32_to_cpu(__raw_readl(bd));
-}
-
-static void greth_clean_rings(struct greth_private *greth)
-{
-	int i;
-	struct greth_bd *rx_bdp = greth->rx_bd_base;
-	struct greth_bd *tx_bdp = greth->tx_bd_base;
-
-	if (greth->gbit_mac) {
-
-		/* Free and unmap RX buffers */
-		for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) {
-			if (greth->rx_skbuff[i] != NULL) {
-				dev_kfree_skb(greth->rx_skbuff[i]);
-				dma_unmap_single(greth->dev,
-						 greth_read_bd(&rx_bdp->addr),
-						 MAX_FRAME_SIZE+NET_IP_ALIGN,
-						 DMA_FROM_DEVICE);
-			}
-		}
-
-		/* TX buffers */
-		while (greth->tx_free < GRETH_TXBD_NUM) {
-
-			struct sk_buff *skb = greth->tx_skbuff[greth->tx_last];
-			int nr_frags = skb_shinfo(skb)->nr_frags;
-			tx_bdp = greth->tx_bd_base + greth->tx_last;
-			greth->tx_last = NEXT_TX(greth->tx_last);
-
-			dma_unmap_single(greth->dev,
-					 greth_read_bd(&tx_bdp->addr),
-					 skb_headlen(skb),
-					 DMA_TO_DEVICE);
-
-			for (i = 0; i < nr_frags; i++) {
-				skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
-				tx_bdp = greth->tx_bd_base + greth->tx_last;
-
-				dma_unmap_page(greth->dev,
-					       greth_read_bd(&tx_bdp->addr),
-					       frag->size,
-					       DMA_TO_DEVICE);
-
-				greth->tx_last = NEXT_TX(greth->tx_last);
-			}
-			greth->tx_free += nr_frags+1;
-			dev_kfree_skb(skb);
-		}
-
-
-	} else { /* 10/100 Mbps MAC */
-
-		for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) {
-			kfree(greth->rx_bufs[i]);
-			dma_unmap_single(greth->dev,
-					 greth_read_bd(&rx_bdp->addr),
-					 MAX_FRAME_SIZE,
-					 DMA_FROM_DEVICE);
-		}
-		for (i = 0; i < GRETH_TXBD_NUM; i++, tx_bdp++) {
-			kfree(greth->tx_bufs[i]);
-			dma_unmap_single(greth->dev,
-					 greth_read_bd(&tx_bdp->addr),
-					 MAX_FRAME_SIZE,
-					 DMA_TO_DEVICE);
-		}
-	}
-}
-
-static int greth_init_rings(struct greth_private *greth)
-{
-	struct sk_buff *skb;
-	struct greth_bd *rx_bd, *tx_bd;
-	u32 dma_addr;
-	int i;
-
-	rx_bd = greth->rx_bd_base;
-	tx_bd = greth->tx_bd_base;
-
-	/* Initialize descriptor rings and buffers */
-	if (greth->gbit_mac) {
-
-		for (i = 0; i < GRETH_RXBD_NUM; i++) {
-			skb = netdev_alloc_skb(greth->netdev, MAX_FRAME_SIZE+NET_IP_ALIGN);
-			if (skb == NULL) {
-				if (netif_msg_ifup(greth))
-					dev_err(greth->dev, "Error allocating DMA ring.\n");
-				goto cleanup;
-			}
-			skb_reserve(skb, NET_IP_ALIGN);
-			dma_addr = dma_map_single(greth->dev,
-						  skb->data,
-						  MAX_FRAME_SIZE+NET_IP_ALIGN,
-						  DMA_FROM_DEVICE);
-
-			if (dma_mapping_error(greth->dev, dma_addr)) {
-				if (netif_msg_ifup(greth))
-					dev_err(greth->dev, "Could not create initial DMA mapping\n");
-				goto cleanup;
-			}
-			greth->rx_skbuff[i] = skb;
-			greth_write_bd(&rx_bd[i].addr, dma_addr);
-			greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE);
-		}
-
-	} else {
-
-		/* 10/100 MAC uses a fixed set of buffers and copy to/from SKBs */
-		for (i = 0; i < GRETH_RXBD_NUM; i++) {
-
-			greth->rx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL);
-
-			if (greth->rx_bufs[i] == NULL) {
-				if (netif_msg_ifup(greth))
-					dev_err(greth->dev, "Error allocating DMA ring.\n");
-				goto cleanup;
-			}
-
-			dma_addr = dma_map_single(greth->dev,
-						  greth->rx_bufs[i],
-						  MAX_FRAME_SIZE,
-						  DMA_FROM_DEVICE);
-
-			if (dma_mapping_error(greth->dev, dma_addr)) {
-				if (netif_msg_ifup(greth))
-					dev_err(greth->dev, "Could not create initial DMA mapping\n");
-				goto cleanup;
-			}
-			greth_write_bd(&rx_bd[i].addr, dma_addr);
-			greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE);
-		}
-		for (i = 0; i < GRETH_TXBD_NUM; i++) {
-
-			greth->tx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL);
-
-			if (greth->tx_bufs[i] == NULL) {
-				if (netif_msg_ifup(greth))
-					dev_err(greth->dev, "Error allocating DMA ring.\n");
-				goto cleanup;
-			}
-
-			dma_addr = dma_map_single(greth->dev,
-						  greth->tx_bufs[i],
-						  MAX_FRAME_SIZE,
-						  DMA_TO_DEVICE);
-
-			if (dma_mapping_error(greth->dev, dma_addr)) {
-				if (netif_msg_ifup(greth))
-					dev_err(greth->dev, "Could not create initial DMA mapping\n");
-				goto cleanup;
-			}
-			greth_write_bd(&tx_bd[i].addr, dma_addr);
-			greth_write_bd(&tx_bd[i].stat, 0);
-		}
-	}
-	greth_write_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat,
-		       greth_read_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat) | GRETH_BD_WR);
-
-	/* Initialize pointers. */
-	greth->rx_cur = 0;
-	greth->tx_next = 0;
-	greth->tx_last = 0;
-	greth->tx_free = GRETH_TXBD_NUM;
-
-	/* Initialize descriptor base address */
-	GRETH_REGSAVE(greth->regs->tx_desc_p, greth->tx_bd_base_phys);
-	GRETH_REGSAVE(greth->regs->rx_desc_p, greth->rx_bd_base_phys);
-
-	return 0;
-
-cleanup:
-	greth_clean_rings(greth);
-	return -ENOMEM;
-}
-
-static int greth_open(struct net_device *dev)
-{
-	struct greth_private *greth = netdev_priv(dev);
-	int err;
-
-	err = greth_init_rings(greth);
-	if (err) {
-		if (netif_msg_ifup(greth))
-			dev_err(&dev->dev, "Could not allocate memory for DMA rings\n");
-		return err;
-	}
-
-	err = request_irq(greth->irq, greth_interrupt, 0, "eth", (void *) dev);
-	if (err) {
-		if (netif_msg_ifup(greth))
-			dev_err(&dev->dev, "Could not allocate interrupt %d\n", dev->irq);
-		greth_clean_rings(greth);
-		return err;
-	}
-
-	if (netif_msg_ifup(greth))
-		dev_dbg(&dev->dev, " starting queue\n");
-	netif_start_queue(dev);
-
-	GRETH_REGSAVE(greth->regs->status, 0xFF);
-
-	napi_enable(&greth->napi);
-
-	greth_enable_irqs(greth);
-	greth_enable_tx(greth);
-	greth_enable_rx(greth);
-	return 0;
-
-}
-
-static int greth_close(struct net_device *dev)
-{
-	struct greth_private *greth = netdev_priv(dev);
-
-	napi_disable(&greth->napi);
-
-	greth_disable_irqs(greth);
-	greth_disable_tx(greth);
-	greth_disable_rx(greth);
-
-	netif_stop_queue(dev);
-
-	free_irq(greth->irq, (void *) dev);
-
-	greth_clean_rings(greth);
-
-	return 0;
-}
-
-static netdev_tx_t
-greth_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct greth_private *greth = netdev_priv(dev);
-	struct greth_bd *bdp;
-	int err = NETDEV_TX_OK;
-	u32 status, dma_addr, ctrl;
-	unsigned long flags;
-
-	/* Clean TX Ring */
-	greth_clean_tx(greth->netdev);
-
-	if (unlikely(greth->tx_free <= 0)) {
-		spin_lock_irqsave(&greth->devlock, flags);/*save from poll/irq*/
-		ctrl = GRETH_REGLOAD(greth->regs->control);
-		/* Enable TX IRQ only if not already in poll() routine */
-		if (ctrl & GRETH_RXI)
-			GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_TXI);
-		netif_stop_queue(dev);
-		spin_unlock_irqrestore(&greth->devlock, flags);
-		return NETDEV_TX_BUSY;
-	}
-
-	if (netif_msg_pktdata(greth))
-		greth_print_tx_packet(skb);
-
-
-	if (unlikely(skb->len > MAX_FRAME_SIZE)) {
-		dev->stats.tx_errors++;
-		goto out;
-	}
-
-	bdp = greth->tx_bd_base + greth->tx_next;
-	dma_addr = greth_read_bd(&bdp->addr);
-
-	memcpy((unsigned char *) phys_to_virt(dma_addr), skb->data, skb->len);
-
-	dma_sync_single_for_device(greth->dev, dma_addr, skb->len, DMA_TO_DEVICE);
-
-	status = GRETH_BD_EN | GRETH_BD_IE | (skb->len & GRETH_BD_LEN);
-
-	/* Wrap around descriptor ring */
-	if (greth->tx_next == GRETH_TXBD_NUM_MASK) {
-		status |= GRETH_BD_WR;
-	}
-
-	greth->tx_next = NEXT_TX(greth->tx_next);
-	greth->tx_free--;
-
-	/* Write descriptor control word and enable transmission */
-	greth_write_bd(&bdp->stat, status);
-	spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/
-	greth_enable_tx(greth);
-	spin_unlock_irqrestore(&greth->devlock, flags);
-
-out:
-	dev_kfree_skb(skb);
-	return err;
-}
-
-
-static netdev_tx_t
-greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct greth_private *greth = netdev_priv(dev);
-	struct greth_bd *bdp;
-	u32 status = 0, dma_addr, ctrl;
-	int curr_tx, nr_frags, i, err = NETDEV_TX_OK;
-	unsigned long flags;
-
-	nr_frags = skb_shinfo(skb)->nr_frags;
-
-	/* Clean TX Ring */
-	greth_clean_tx_gbit(dev);
-
-	if (greth->tx_free < nr_frags + 1) {
-		spin_lock_irqsave(&greth->devlock, flags);/*save from poll/irq*/
-		ctrl = GRETH_REGLOAD(greth->regs->control);
-		/* Enable TX IRQ only if not already in poll() routine */
-		if (ctrl & GRETH_RXI)
-			GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_TXI);
-		netif_stop_queue(dev);
-		spin_unlock_irqrestore(&greth->devlock, flags);
-		err = NETDEV_TX_BUSY;
-		goto out;
-	}
-
-	if (netif_msg_pktdata(greth))
-		greth_print_tx_packet(skb);
-
-	if (unlikely(skb->len > MAX_FRAME_SIZE)) {
-		dev->stats.tx_errors++;
-		goto out;
-	}
-
-	/* Save skb pointer. */
-	greth->tx_skbuff[greth->tx_next] = skb;
-
-	/* Linear buf */
-	if (nr_frags != 0)
-		status = GRETH_TXBD_MORE;
-
-	status |= GRETH_TXBD_CSALL;
-	status |= skb_headlen(skb) & GRETH_BD_LEN;
-	if (greth->tx_next == GRETH_TXBD_NUM_MASK)
-		status |= GRETH_BD_WR;
-
-
-	bdp = greth->tx_bd_base + greth->tx_next;
-	greth_write_bd(&bdp->stat, status);
-	dma_addr = dma_map_single(greth->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
-
-	if (unlikely(dma_mapping_error(greth->dev, dma_addr)))
-		goto map_error;
-
-	greth_write_bd(&bdp->addr, dma_addr);
-
-	curr_tx = NEXT_TX(greth->tx_next);
-
-	/* Frags */
-	for (i = 0; i < nr_frags; i++) {
-		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
-		greth->tx_skbuff[curr_tx] = NULL;
-		bdp = greth->tx_bd_base + curr_tx;
-
-		status = GRETH_TXBD_CSALL | GRETH_BD_EN;
-		status |= frag->size & GRETH_BD_LEN;
-
-		/* Wrap around descriptor ring */
-		if (curr_tx == GRETH_TXBD_NUM_MASK)
-			status |= GRETH_BD_WR;
-
-		/* More fragments left */
-		if (i < nr_frags - 1)
-			status |= GRETH_TXBD_MORE;
-		else
-			status |= GRETH_BD_IE; /* enable IRQ on last fragment */
-
-		greth_write_bd(&bdp->stat, status);
-
-		dma_addr = dma_map_page(greth->dev,
-					frag->page,
-					frag->page_offset,
-					frag->size,
-					DMA_TO_DEVICE);
-
-		if (unlikely(dma_mapping_error(greth->dev, dma_addr)))
-			goto frag_map_error;
-
-		greth_write_bd(&bdp->addr, dma_addr);
-
-		curr_tx = NEXT_TX(curr_tx);
-	}
-
-	wmb();
-
-	/* Enable the descriptor chain by enabling the first descriptor */
-	bdp = greth->tx_bd_base + greth->tx_next;
-	greth_write_bd(&bdp->stat, greth_read_bd(&bdp->stat) | GRETH_BD_EN);
-	greth->tx_next = curr_tx;
-	greth->tx_free -= nr_frags + 1;
-
-	wmb();
-
-	spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/
-	greth_enable_tx(greth);
-	spin_unlock_irqrestore(&greth->devlock, flags);
-
-	return NETDEV_TX_OK;
-
-frag_map_error:
-	/* Unmap SKB mappings that succeeded and disable descriptor */
-	for (i = 0; greth->tx_next + i != curr_tx; i++) {
-		bdp = greth->tx_bd_base + greth->tx_next + i;
-		dma_unmap_single(greth->dev,
-				 greth_read_bd(&bdp->addr),
-				 greth_read_bd(&bdp->stat) & GRETH_BD_LEN,
-				 DMA_TO_DEVICE);
-		greth_write_bd(&bdp->stat, 0);
-	}
-map_error:
-	if (net_ratelimit())
-		dev_warn(greth->dev, "Could not create TX DMA mapping\n");
-	dev_kfree_skb(skb);
-out:
-	return err;
-}
-
-static irqreturn_t greth_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = dev_id;
-	struct greth_private *greth;
-	u32 status, ctrl;
-	irqreturn_t retval = IRQ_NONE;
-
-	greth = netdev_priv(dev);
-
-	spin_lock(&greth->devlock);
-
-	/* Get the interrupt events that caused us to be here. */
-	status = GRETH_REGLOAD(greth->regs->status);
-
-	/* Must see if interrupts are enabled also, INT_TX|INT_RX flags may be
-	 * set regardless of whether IRQ is enabled or not. Especially
-	 * important when shared IRQ.
-	 */
-	ctrl = GRETH_REGLOAD(greth->regs->control);
-
-	/* Handle rx and tx interrupts through poll */
-	if (((status & (GRETH_INT_RE | GRETH_INT_RX)) && (ctrl & GRETH_RXI)) ||
-	    ((status & (GRETH_INT_TE | GRETH_INT_TX)) && (ctrl & GRETH_TXI))) {
-		retval = IRQ_HANDLED;
-
-		/* Disable interrupts and schedule poll() */
-		greth_disable_irqs(greth);
-		napi_schedule(&greth->napi);
-	}
-
-	mmiowb();
-	spin_unlock(&greth->devlock);
-
-	return retval;
-}
-
-static void greth_clean_tx(struct net_device *dev)
-{
-	struct greth_private *greth;
-	struct greth_bd *bdp;
-	u32 stat;
-
-	greth = netdev_priv(dev);
-
-	while (1) {
-		bdp = greth->tx_bd_base + greth->tx_last;
-		GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX);
-		mb();
-		stat = greth_read_bd(&bdp->stat);
-
-		if (unlikely(stat & GRETH_BD_EN))
-			break;
-
-		if (greth->tx_free == GRETH_TXBD_NUM)
-			break;
-
-		/* Check status for errors */
-		if (unlikely(stat & GRETH_TXBD_STATUS)) {
-			dev->stats.tx_errors++;
-			if (stat & GRETH_TXBD_ERR_AL)
-				dev->stats.tx_aborted_errors++;
-			if (stat & GRETH_TXBD_ERR_UE)
-				dev->stats.tx_fifo_errors++;
-		}
-		dev->stats.tx_packets++;
-		greth->tx_last = NEXT_TX(greth->tx_last);
-		greth->tx_free++;
-	}
-
-	if (greth->tx_free > 0) {
-		netif_wake_queue(dev);
-	}
-
-}
-
-static inline void greth_update_tx_stats(struct net_device *dev, u32 stat)
-{
-	/* Check status for errors */
-	if (unlikely(stat & GRETH_TXBD_STATUS)) {
-		dev->stats.tx_errors++;
-		if (stat & GRETH_TXBD_ERR_AL)
-			dev->stats.tx_aborted_errors++;
-		if (stat & GRETH_TXBD_ERR_UE)
-			dev->stats.tx_fifo_errors++;
-		if (stat & GRETH_TXBD_ERR_LC)
-			dev->stats.tx_aborted_errors++;
-	}
-	dev->stats.tx_packets++;
-}
-
-static void greth_clean_tx_gbit(struct net_device *dev)
-{
-	struct greth_private *greth;
-	struct greth_bd *bdp, *bdp_last_frag;
-	struct sk_buff *skb;
-	u32 stat;
-	int nr_frags, i;
-
-	greth = netdev_priv(dev);
-
-	while (greth->tx_free < GRETH_TXBD_NUM) {
-
-		skb = greth->tx_skbuff[greth->tx_last];
-
-		nr_frags = skb_shinfo(skb)->nr_frags;
-
-		/* We only clean fully completed SKBs */
-		bdp_last_frag = greth->tx_bd_base + SKIP_TX(greth->tx_last, nr_frags);
-
-		GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX);
-		mb();
-		stat = greth_read_bd(&bdp_last_frag->stat);
-
-		if (stat & GRETH_BD_EN)
-			break;
-
-		greth->tx_skbuff[greth->tx_last] = NULL;
-
-		greth_update_tx_stats(dev, stat);
-
-		bdp = greth->tx_bd_base + greth->tx_last;
-
-		greth->tx_last = NEXT_TX(greth->tx_last);
-
-		dma_unmap_single(greth->dev,
-				 greth_read_bd(&bdp->addr),
-				 skb_headlen(skb),
-				 DMA_TO_DEVICE);
-
-		for (i = 0; i < nr_frags; i++) {
-			skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
-			bdp = greth->tx_bd_base + greth->tx_last;
-
-			dma_unmap_page(greth->dev,
-				       greth_read_bd(&bdp->addr),
-				       frag->size,
-				       DMA_TO_DEVICE);
-
-			greth->tx_last = NEXT_TX(greth->tx_last);
-		}
-		greth->tx_free += nr_frags+1;
-		dev_kfree_skb(skb);
-	}
-
-	if (netif_queue_stopped(dev) && (greth->tx_free > (MAX_SKB_FRAGS+1)))
-		netif_wake_queue(dev);
-}
-
-static int greth_rx(struct net_device *dev, int limit)
-{
-	struct greth_private *greth;
-	struct greth_bd *bdp;
-	struct sk_buff *skb;
-	int pkt_len;
-	int bad, count;
-	u32 status, dma_addr;
-	unsigned long flags;
-
-	greth = netdev_priv(dev);
-
-	for (count = 0; count < limit; ++count) {
-
-		bdp = greth->rx_bd_base + greth->rx_cur;
-		GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX);
-		mb();
-		status = greth_read_bd(&bdp->stat);
-
-		if (unlikely(status & GRETH_BD_EN)) {
-			break;
-		}
-
-		dma_addr = greth_read_bd(&bdp->addr);
-		bad = 0;
-
-		/* Check status for errors. */
-		if (unlikely(status & GRETH_RXBD_STATUS)) {
-			if (status & GRETH_RXBD_ERR_FT) {
-				dev->stats.rx_length_errors++;
-				bad = 1;
-			}
-			if (status & (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE)) {
-				dev->stats.rx_frame_errors++;
-				bad = 1;
-			}
-			if (status & GRETH_RXBD_ERR_CRC) {
-				dev->stats.rx_crc_errors++;
-				bad = 1;
-			}
-		}
-		if (unlikely(bad)) {
-			dev->stats.rx_errors++;
-
-		} else {
-
-			pkt_len = status & GRETH_BD_LEN;
-
-			skb = netdev_alloc_skb(dev, pkt_len + NET_IP_ALIGN);
-
-			if (unlikely(skb == NULL)) {
-
-				if (net_ratelimit())
-					dev_warn(&dev->dev, "low on memory - " "packet dropped\n");
-
-				dev->stats.rx_dropped++;
-
-			} else {
-				skb_reserve(skb, NET_IP_ALIGN);
-				skb->dev = dev;
-
-				dma_sync_single_for_cpu(greth->dev,
-							dma_addr,
-							pkt_len,
-							DMA_FROM_DEVICE);
-
-				if (netif_msg_pktdata(greth))
-					greth_print_rx_packet(phys_to_virt(dma_addr), pkt_len);
-
-				memcpy(skb_put(skb, pkt_len), phys_to_virt(dma_addr), pkt_len);
-
-				skb->protocol = eth_type_trans(skb, dev);
-				dev->stats.rx_packets++;
-				netif_receive_skb(skb);
-			}
-		}
-
-		status = GRETH_BD_EN | GRETH_BD_IE;
-		if (greth->rx_cur == GRETH_RXBD_NUM_MASK) {
-			status |= GRETH_BD_WR;
-		}
-
-		wmb();
-		greth_write_bd(&bdp->stat, status);
-
-		dma_sync_single_for_device(greth->dev, dma_addr, MAX_FRAME_SIZE, DMA_FROM_DEVICE);
-
-		spin_lock_irqsave(&greth->devlock, flags); /* save from XMIT */
-		greth_enable_rx(greth);
-		spin_unlock_irqrestore(&greth->devlock, flags);
-
-		greth->rx_cur = NEXT_RX(greth->rx_cur);
-	}
-
-	return count;
-}
-
-static inline int hw_checksummed(u32 status)
-{
-
-	if (status & GRETH_RXBD_IP_FRAG)
-		return 0;
-
-	if (status & GRETH_RXBD_IP && status & GRETH_RXBD_IP_CSERR)
-		return 0;
-
-	if (status & GRETH_RXBD_UDP && status & GRETH_RXBD_UDP_CSERR)
-		return 0;
-
-	if (status & GRETH_RXBD_TCP && status & GRETH_RXBD_TCP_CSERR)
-		return 0;
-
-	return 1;
-}
-
-static int greth_rx_gbit(struct net_device *dev, int limit)
-{
-	struct greth_private *greth;
-	struct greth_bd *bdp;
-	struct sk_buff *skb, *newskb;
-	int pkt_len;
-	int bad, count = 0;
-	u32 status, dma_addr;
-	unsigned long flags;
-
-	greth = netdev_priv(dev);
-
-	for (count = 0; count < limit; ++count) {
-
-		bdp = greth->rx_bd_base + greth->rx_cur;
-		skb = greth->rx_skbuff[greth->rx_cur];
-		GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX);
-		mb();
-		status = greth_read_bd(&bdp->stat);
-		bad = 0;
-
-		if (status & GRETH_BD_EN)
-			break;
-
-		/* Check status for errors. */
-		if (unlikely(status & GRETH_RXBD_STATUS)) {
-
-			if (status & GRETH_RXBD_ERR_FT) {
-				dev->stats.rx_length_errors++;
-				bad = 1;
-			} else if (status &
-				   (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE | GRETH_RXBD_ERR_LE)) {
-				dev->stats.rx_frame_errors++;
-				bad = 1;
-			} else if (status & GRETH_RXBD_ERR_CRC) {
-				dev->stats.rx_crc_errors++;
-				bad = 1;
-			}
-		}
-
-		/* Allocate new skb to replace current, not needed if the
-		 * current skb can be reused */
-		if (!bad && (newskb=netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN))) {
-			skb_reserve(newskb, NET_IP_ALIGN);
-
-			dma_addr = dma_map_single(greth->dev,
-						      newskb->data,
-						      MAX_FRAME_SIZE + NET_IP_ALIGN,
-						      DMA_FROM_DEVICE);
-
-			if (!dma_mapping_error(greth->dev, dma_addr)) {
-				/* Process the incoming frame. */
-				pkt_len = status & GRETH_BD_LEN;
-
-				dma_unmap_single(greth->dev,
-						 greth_read_bd(&bdp->addr),
-						 MAX_FRAME_SIZE + NET_IP_ALIGN,
-						 DMA_FROM_DEVICE);
-
-				if (netif_msg_pktdata(greth))
-					greth_print_rx_packet(phys_to_virt(greth_read_bd(&bdp->addr)), pkt_len);
-
-				skb_put(skb, pkt_len);
-
-				if (dev->features & NETIF_F_RXCSUM && hw_checksummed(status))
-					skb->ip_summed = CHECKSUM_UNNECESSARY;
-				else
-					skb_checksum_none_assert(skb);
-
-				skb->protocol = eth_type_trans(skb, dev);
-				dev->stats.rx_packets++;
-				netif_receive_skb(skb);
-
-				greth->rx_skbuff[greth->rx_cur] = newskb;
-				greth_write_bd(&bdp->addr, dma_addr);
-			} else {
-				if (net_ratelimit())
-					dev_warn(greth->dev, "Could not create DMA mapping, dropping packet\n");
-				dev_kfree_skb(newskb);
-				/* reusing current skb, so it is a drop */
-				dev->stats.rx_dropped++;
-			}
-		} else if (bad) {
-			/* Bad Frame transfer, the skb is reused */
-			dev->stats.rx_dropped++;
-		} else {
-			/* Failed Allocating a new skb. This is rather stupid
-			 * but the current "filled" skb is reused, as if
-			 * transfer failure. One could argue that RX descriptor
-			 * table handling should be divided into cleaning and
-			 * filling as the TX part of the driver
-			 */
-			if (net_ratelimit())
-				dev_warn(greth->dev, "Could not allocate SKB, dropping packet\n");
-			/* reusing current skb, so it is a drop */
-			dev->stats.rx_dropped++;
-		}
-
-		status = GRETH_BD_EN | GRETH_BD_IE;
-		if (greth->rx_cur == GRETH_RXBD_NUM_MASK) {
-			status |= GRETH_BD_WR;
-		}
-
-		wmb();
-		greth_write_bd(&bdp->stat, status);
-		spin_lock_irqsave(&greth->devlock, flags);
-		greth_enable_rx(greth);
-		spin_unlock_irqrestore(&greth->devlock, flags);
-		greth->rx_cur = NEXT_RX(greth->rx_cur);
-	}
-
-	return count;
-
-}
-
-static int greth_poll(struct napi_struct *napi, int budget)
-{
-	struct greth_private *greth;
-	int work_done = 0;
-	unsigned long flags;
-	u32 mask, ctrl;
-	greth = container_of(napi, struct greth_private, napi);
-
-restart_txrx_poll:
-	if (netif_queue_stopped(greth->netdev)) {
-		if (greth->gbit_mac)
-			greth_clean_tx_gbit(greth->netdev);
-		else
-			greth_clean_tx(greth->netdev);
-	}
-
-	if (greth->gbit_mac) {
-		work_done += greth_rx_gbit(greth->netdev, budget - work_done);
-	} else {
-		work_done += greth_rx(greth->netdev, budget - work_done);
-	}
-
-	if (work_done < budget) {
-
-		spin_lock_irqsave(&greth->devlock, flags);
-
-		ctrl = GRETH_REGLOAD(greth->regs->control);
-		if (netif_queue_stopped(greth->netdev)) {
-			GRETH_REGSAVE(greth->regs->control,
-					ctrl | GRETH_TXI | GRETH_RXI);
-			mask = GRETH_INT_RX | GRETH_INT_RE |
-			       GRETH_INT_TX | GRETH_INT_TE;
-		} else {
-			GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_RXI);
-			mask = GRETH_INT_RX | GRETH_INT_RE;
-		}
-
-		if (GRETH_REGLOAD(greth->regs->status) & mask) {
-			GRETH_REGSAVE(greth->regs->control, ctrl);
-			spin_unlock_irqrestore(&greth->devlock, flags);
-			goto restart_txrx_poll;
-		} else {
-			__napi_complete(napi);
-			spin_unlock_irqrestore(&greth->devlock, flags);
-		}
-	}
-
-	return work_done;
-}
-
-static int greth_set_mac_add(struct net_device *dev, void *p)
-{
-	struct sockaddr *addr = p;
-	struct greth_private *greth;
-	struct greth_regs *regs;
-
-	greth = netdev_priv(dev);
-	regs = (struct greth_regs *) greth->regs;
-
-	if (!is_valid_ether_addr(addr->sa_data))
-		return -EINVAL;
-
-	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
-	GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]);
-	GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 |
-		      dev->dev_addr[4] << 8 | dev->dev_addr[5]);
-
-	return 0;
-}
-
-static u32 greth_hash_get_index(__u8 *addr)
-{
-	return (ether_crc(6, addr)) & 0x3F;
-}
-
-static void greth_set_hash_filter(struct net_device *dev)
-{
-	struct netdev_hw_addr *ha;
-	struct greth_private *greth = netdev_priv(dev);
-	struct greth_regs *regs = (struct greth_regs *) greth->regs;
-	u32 mc_filter[2];
-	unsigned int bitnr;
-
-	mc_filter[0] = mc_filter[1] = 0;
-
-	netdev_for_each_mc_addr(ha, dev) {
-		bitnr = greth_hash_get_index(ha->addr);
-		mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
-	}
-
-	GRETH_REGSAVE(regs->hash_msb, mc_filter[1]);
-	GRETH_REGSAVE(regs->hash_lsb, mc_filter[0]);
-}
-
-static void greth_set_multicast_list(struct net_device *dev)
-{
-	int cfg;
-	struct greth_private *greth = netdev_priv(dev);
-	struct greth_regs *regs = (struct greth_regs *) greth->regs;
-
-	cfg = GRETH_REGLOAD(regs->control);
-	if (dev->flags & IFF_PROMISC)
-		cfg |= GRETH_CTRL_PR;
-	else
-		cfg &= ~GRETH_CTRL_PR;
-
-	if (greth->multicast) {
-		if (dev->flags & IFF_ALLMULTI) {
-			GRETH_REGSAVE(regs->hash_msb, -1);
-			GRETH_REGSAVE(regs->hash_lsb, -1);
-			cfg |= GRETH_CTRL_MCEN;
-			GRETH_REGSAVE(regs->control, cfg);
-			return;
-		}
-
-		if (netdev_mc_empty(dev)) {
-			cfg &= ~GRETH_CTRL_MCEN;
-			GRETH_REGSAVE(regs->control, cfg);
-			return;
-		}
-
-		/* Setup multicast filter */
-		greth_set_hash_filter(dev);
-		cfg |= GRETH_CTRL_MCEN;
-	}
-	GRETH_REGSAVE(regs->control, cfg);
-}
-
-static u32 greth_get_msglevel(struct net_device *dev)
-{
-	struct greth_private *greth = netdev_priv(dev);
-	return greth->msg_enable;
-}
-
-static void greth_set_msglevel(struct net_device *dev, u32 value)
-{
-	struct greth_private *greth = netdev_priv(dev);
-	greth->msg_enable = value;
-}
-static int greth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	struct greth_private *greth = netdev_priv(dev);
-	struct phy_device *phy = greth->phy;
-
-	if (!phy)
-		return -ENODEV;
-
-	return phy_ethtool_gset(phy, cmd);
-}
-
-static int greth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	struct greth_private *greth = netdev_priv(dev);
-	struct phy_device *phy = greth->phy;
-
-	if (!phy)
-		return -ENODEV;
-
-	return phy_ethtool_sset(phy, cmd);
-}
-
-static int greth_get_regs_len(struct net_device *dev)
-{
-	return sizeof(struct greth_regs);
-}
-
-static void greth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
-{
-	struct greth_private *greth = netdev_priv(dev);
-
-	strncpy(info->driver, dev_driver_string(greth->dev), 32);
-	strncpy(info->version, "revision: 1.0", 32);
-	strncpy(info->bus_info, greth->dev->bus->name, 32);
-	strncpy(info->fw_version, "N/A", 32);
-	info->eedump_len = 0;
-	info->regdump_len = sizeof(struct greth_regs);
-}
-
-static void greth_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p)
-{
-	int i;
-	struct greth_private *greth = netdev_priv(dev);
-	u32 __iomem *greth_regs = (u32 __iomem *) greth->regs;
-	u32 *buff = p;
-
-	for (i = 0; i < sizeof(struct greth_regs) / sizeof(u32); i++)
-		buff[i] = greth_read_bd(&greth_regs[i]);
-}
-
-static const struct ethtool_ops greth_ethtool_ops = {
-	.get_msglevel		= greth_get_msglevel,
-	.set_msglevel		= greth_set_msglevel,
-	.get_settings		= greth_get_settings,
-	.set_settings		= greth_set_settings,
-	.get_drvinfo		= greth_get_drvinfo,
-	.get_regs_len           = greth_get_regs_len,
-	.get_regs               = greth_get_regs,
-	.get_link		= ethtool_op_get_link,
-};
-
-static struct net_device_ops greth_netdev_ops = {
-	.ndo_open		= greth_open,
-	.ndo_stop		= greth_close,
-	.ndo_start_xmit		= greth_start_xmit,
-	.ndo_set_mac_address	= greth_set_mac_add,
-	.ndo_validate_addr	= eth_validate_addr,
-};
-
-static inline int wait_for_mdio(struct greth_private *greth)
-{
-	unsigned long timeout = jiffies + 4*HZ/100;
-	while (GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_BUSY) {
-		if (time_after(jiffies, timeout))
-			return 0;
-	}
-	return 1;
-}
-
-static int greth_mdio_read(struct mii_bus *bus, int phy, int reg)
-{
-	struct greth_private *greth = bus->priv;
-	int data;
-
-	if (!wait_for_mdio(greth))
-		return -EBUSY;
-
-	GRETH_REGSAVE(greth->regs->mdio, ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 2);
-
-	if (!wait_for_mdio(greth))
-		return -EBUSY;
-
-	if (!(GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_NVALID)) {
-		data = (GRETH_REGLOAD(greth->regs->mdio) >> 16) & 0xFFFF;
-		return data;
-
-	} else {
-		return -1;
-	}
-}
-
-static int greth_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
-{
-	struct greth_private *greth = bus->priv;
-
-	if (!wait_for_mdio(greth))
-		return -EBUSY;
-
-	GRETH_REGSAVE(greth->regs->mdio,
-		      ((val & 0xFFFF) << 16) | ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 1);
-
-	if (!wait_for_mdio(greth))
-		return -EBUSY;
-
-	return 0;
-}
-
-static int greth_mdio_reset(struct mii_bus *bus)
-{
-	return 0;
-}
-
-static void greth_link_change(struct net_device *dev)
-{
-	struct greth_private *greth = netdev_priv(dev);
-	struct phy_device *phydev = greth->phy;
-	unsigned long flags;
-	int status_change = 0;
-	u32 ctrl;
-
-	spin_lock_irqsave(&greth->devlock, flags);
-
-	if (phydev->link) {
-
-		if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) {
-			ctrl = GRETH_REGLOAD(greth->regs->control) &
-			       ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB);
-
-			if (phydev->duplex)
-				ctrl |= GRETH_CTRL_FD;
-
-			if (phydev->speed == SPEED_100)
-				ctrl |= GRETH_CTRL_SP;
-			else if (phydev->speed == SPEED_1000)
-				ctrl |= GRETH_CTRL_GB;
-
-			GRETH_REGSAVE(greth->regs->control, ctrl);
-			greth->speed = phydev->speed;
-			greth->duplex = phydev->duplex;
-			status_change = 1;
-		}
-	}
-
-	if (phydev->link != greth->link) {
-		if (!phydev->link) {
-			greth->speed = 0;
-			greth->duplex = -1;
-		}
-		greth->link = phydev->link;
-
-		status_change = 1;
-	}
-
-	spin_unlock_irqrestore(&greth->devlock, flags);
-
-	if (status_change) {
-		if (phydev->link)
-			pr_debug("%s: link up (%d/%s)\n",
-				dev->name, phydev->speed,
-				DUPLEX_FULL == phydev->duplex ? "Full" : "Half");
-		else
-			pr_debug("%s: link down\n", dev->name);
-	}
-}
-
-static int greth_mdio_probe(struct net_device *dev)
-{
-	struct greth_private *greth = netdev_priv(dev);
-	struct phy_device *phy = NULL;
-	int ret;
-
-	/* Find the first PHY */
-	phy = phy_find_first(greth->mdio);
-
-	if (!phy) {
-		if (netif_msg_probe(greth))
-			dev_err(&dev->dev, "no PHY found\n");
-		return -ENXIO;
-	}
-
-	ret = phy_connect_direct(dev, phy, &greth_link_change,
-			0, greth->gbit_mac ?
-			PHY_INTERFACE_MODE_GMII :
-			PHY_INTERFACE_MODE_MII);
-	if (ret) {
-		if (netif_msg_ifup(greth))
-			dev_err(&dev->dev, "could not attach to PHY\n");
-		return ret;
-	}
-
-	if (greth->gbit_mac)
-		phy->supported &= PHY_GBIT_FEATURES;
-	else
-		phy->supported &= PHY_BASIC_FEATURES;
-
-	phy->advertising = phy->supported;
-
-	greth->link = 0;
-	greth->speed = 0;
-	greth->duplex = -1;
-	greth->phy = phy;
-
-	return 0;
-}
-
-static inline int phy_aneg_done(struct phy_device *phydev)
-{
-	int retval;
-
-	retval = phy_read(phydev, MII_BMSR);
-
-	return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
-}
-
-static int greth_mdio_init(struct greth_private *greth)
-{
-	int ret, phy;
-	unsigned long timeout;
-
-	greth->mdio = mdiobus_alloc();
-	if (!greth->mdio) {
-		return -ENOMEM;
-	}
-
-	greth->mdio->name = "greth-mdio";
-	snprintf(greth->mdio->id, MII_BUS_ID_SIZE, "%s-%d", greth->mdio->name, greth->irq);
-	greth->mdio->read = greth_mdio_read;
-	greth->mdio->write = greth_mdio_write;
-	greth->mdio->reset = greth_mdio_reset;
-	greth->mdio->priv = greth;
-
-	greth->mdio->irq = greth->mdio_irqs;
-
-	for (phy = 0; phy < PHY_MAX_ADDR; phy++)
-		greth->mdio->irq[phy] = PHY_POLL;
-
-	ret = mdiobus_register(greth->mdio);
-	if (ret) {
-		goto error;
-	}
-
-	ret = greth_mdio_probe(greth->netdev);
-	if (ret) {
-		if (netif_msg_probe(greth))
-			dev_err(&greth->netdev->dev, "failed to probe MDIO bus\n");
-		goto unreg_mdio;
-	}
-
-	phy_start(greth->phy);
-
-	/* If Ethernet debug link is used make autoneg happen right away */
-	if (greth->edcl && greth_edcl == 1) {
-		phy_start_aneg(greth->phy);
-		timeout = jiffies + 6*HZ;
-		while (!phy_aneg_done(greth->phy) && time_before(jiffies, timeout)) {
-		}
-		genphy_read_status(greth->phy);
-		greth_link_change(greth->netdev);
-	}
-
-	return 0;
-
-unreg_mdio:
-	mdiobus_unregister(greth->mdio);
-error:
-	mdiobus_free(greth->mdio);
-	return ret;
-}
-
-/* Initialize the GRETH MAC */
-static int __devinit greth_of_probe(struct platform_device *ofdev)
-{
-	struct net_device *dev;
-	struct greth_private *greth;
-	struct greth_regs *regs;
-
-	int i;
-	int err;
-	int tmp;
-	unsigned long timeout;
-
-	dev = alloc_etherdev(sizeof(struct greth_private));
-
-	if (dev == NULL)
-		return -ENOMEM;
-
-	greth = netdev_priv(dev);
-	greth->netdev = dev;
-	greth->dev = &ofdev->dev;
-
-	if (greth_debug > 0)
-		greth->msg_enable = greth_debug;
-	else
-		greth->msg_enable = GRETH_DEF_MSG_ENABLE;
-
-	spin_lock_init(&greth->devlock);
-
-	greth->regs = of_ioremap(&ofdev->resource[0], 0,
-				 resource_size(&ofdev->resource[0]),
-				 "grlib-greth regs");
-
-	if (greth->regs == NULL) {
-		if (netif_msg_probe(greth))
-			dev_err(greth->dev, "ioremap failure.\n");
-		err = -EIO;
-		goto error1;
-	}
-
-	regs = (struct greth_regs *) greth->regs;
-	greth->irq = ofdev->archdata.irqs[0];
-
-	dev_set_drvdata(greth->dev, dev);
-	SET_NETDEV_DEV(dev, greth->dev);
-
-	if (netif_msg_probe(greth))
-		dev_dbg(greth->dev, "reseting controller.\n");
-
-	/* Reset the controller. */
-	GRETH_REGSAVE(regs->control, GRETH_RESET);
-
-	/* Wait for MAC to reset itself */
-	timeout = jiffies + HZ/100;
-	while (GRETH_REGLOAD(regs->control) & GRETH_RESET) {
-		if (time_after(jiffies, timeout)) {
-			err = -EIO;
-			if (netif_msg_probe(greth))
-				dev_err(greth->dev, "timeout when waiting for reset.\n");
-			goto error2;
-		}
-	}
-
-	/* Get default PHY address  */
-	greth->phyaddr = (GRETH_REGLOAD(regs->mdio) >> 11) & 0x1F;
-
-	/* Check if we have GBIT capable MAC */
-	tmp = GRETH_REGLOAD(regs->control);
-	greth->gbit_mac = (tmp >> 27) & 1;
-
-	/* Check for multicast capability */
-	greth->multicast = (tmp >> 25) & 1;
-
-	greth->edcl = (tmp >> 31) & 1;
-
-	/* If we have EDCL we disable the EDCL speed-duplex FSM so
-	 * it doesn't interfere with the software */
-	if (greth->edcl != 0)
-		GRETH_REGORIN(regs->control, GRETH_CTRL_DISDUPLEX);
-
-	/* Check if MAC can handle MDIO interrupts */
-	greth->mdio_int_en = (tmp >> 26) & 1;
-
-	err = greth_mdio_init(greth);
-	if (err) {
-		if (netif_msg_probe(greth))
-			dev_err(greth->dev, "failed to register MDIO bus\n");
-		goto error2;
-	}
-
-	/* Allocate TX descriptor ring in coherent memory */
-	greth->tx_bd_base = (struct greth_bd *) dma_alloc_coherent(greth->dev,
-								   1024,
-								   &greth->tx_bd_base_phys,
-								   GFP_KERNEL);
-
-	if (!greth->tx_bd_base) {
-		if (netif_msg_probe(greth))
-			dev_err(&dev->dev, "could not allocate descriptor memory.\n");
-		err = -ENOMEM;
-		goto error3;
-	}
-
-	memset(greth->tx_bd_base, 0, 1024);
-
-	/* Allocate RX descriptor ring in coherent memory */
-	greth->rx_bd_base = (struct greth_bd *) dma_alloc_coherent(greth->dev,
-								   1024,
-								   &greth->rx_bd_base_phys,
-								   GFP_KERNEL);
-
-	if (!greth->rx_bd_base) {
-		if (netif_msg_probe(greth))
-			dev_err(greth->dev, "could not allocate descriptor memory.\n");
-		err = -ENOMEM;
-		goto error4;
-	}
-
-	memset(greth->rx_bd_base, 0, 1024);
-
-	/* Get MAC address from: module param, OF property or ID prom */
-	for (i = 0; i < 6; i++) {
-		if (macaddr[i] != 0)
-			break;
-	}
-	if (i == 6) {
-		const unsigned char *addr;
-		int len;
-		addr = of_get_property(ofdev->dev.of_node, "local-mac-address",
-					&len);
-		if (addr != NULL && len == 6) {
-			for (i = 0; i < 6; i++)
-				macaddr[i] = (unsigned int) addr[i];
-		} else {
-#ifdef CONFIG_SPARC
-			for (i = 0; i < 6; i++)
-				macaddr[i] = (unsigned int) idprom->id_ethaddr[i];
-#endif
-		}
-	}
-
-	for (i = 0; i < 6; i++)
-		dev->dev_addr[i] = macaddr[i];
-
-	macaddr[5]++;
-
-	if (!is_valid_ether_addr(&dev->dev_addr[0])) {
-		if (netif_msg_probe(greth))
-			dev_err(greth->dev, "no valid ethernet address, aborting.\n");
-		err = -EINVAL;
-		goto error5;
-	}
-
-	GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]);
-	GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 |
-		      dev->dev_addr[4] << 8 | dev->dev_addr[5]);
-
-	/* Clear all pending interrupts except PHY irq */
-	GRETH_REGSAVE(regs->status, 0xFF);
-
-	if (greth->gbit_mac) {
-		dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM |
-			NETIF_F_RXCSUM;
-		dev->features = dev->hw_features | NETIF_F_HIGHDMA;
-		greth_netdev_ops.ndo_start_xmit = greth_start_xmit_gbit;
-	}
-
-	if (greth->multicast) {
-		greth_netdev_ops.ndo_set_multicast_list = greth_set_multicast_list;
-		dev->flags |= IFF_MULTICAST;
-	} else {
-		dev->flags &= ~IFF_MULTICAST;
-	}
-
-	dev->netdev_ops = &greth_netdev_ops;
-	dev->ethtool_ops = &greth_ethtool_ops;
-
-	err = register_netdev(dev);
-	if (err) {
-		if (netif_msg_probe(greth))
-			dev_err(greth->dev, "netdevice registration failed.\n");
-		goto error5;
-	}
-
-	/* setup NAPI */
-	netif_napi_add(dev, &greth->napi, greth_poll, 64);
-
-	return 0;
-
-error5:
-	dma_free_coherent(greth->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys);
-error4:
-	dma_free_coherent(greth->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys);
-error3:
-	mdiobus_unregister(greth->mdio);
-error2:
-	of_iounmap(&ofdev->resource[0], greth->regs, resource_size(&ofdev->resource[0]));
-error1:
-	free_netdev(dev);
-	return err;
-}
-
-static int __devexit greth_of_remove(struct platform_device *of_dev)
-{
-	struct net_device *ndev = dev_get_drvdata(&of_dev->dev);
-	struct greth_private *greth = netdev_priv(ndev);
-
-	/* Free descriptor areas */
-	dma_free_coherent(&of_dev->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys);
-
-	dma_free_coherent(&of_dev->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys);
-
-	dev_set_drvdata(&of_dev->dev, NULL);
-
-	if (greth->phy)
-		phy_stop(greth->phy);
-	mdiobus_unregister(greth->mdio);
-
-	unregister_netdev(ndev);
-	free_netdev(ndev);
-
-	of_iounmap(&of_dev->resource[0], greth->regs, resource_size(&of_dev->resource[0]));
-
-	return 0;
-}
-
-static struct of_device_id greth_of_match[] = {
-	{
-	 .name = "GAISLER_ETHMAC",
-	 },
-	{
-	 .name = "01_01d",
-	 },
-	{},
-};
-
-MODULE_DEVICE_TABLE(of, greth_of_match);
-
-static struct platform_driver greth_of_driver = {
-	.driver = {
-		.name = "grlib-greth",
-		.owner = THIS_MODULE,
-		.of_match_table = greth_of_match,
-	},
-	.probe = greth_of_probe,
-	.remove = __devexit_p(greth_of_remove),
-};
-
-static int __init greth_init(void)
-{
-	return platform_driver_register(&greth_of_driver);
-}
-
-static void __exit greth_cleanup(void)
-{
-	platform_driver_unregister(&greth_of_driver);
-}
-
-module_init(greth_init);
-module_exit(greth_cleanup);
-
-MODULE_AUTHOR("Aeroflex Gaisler AB.");
-MODULE_DESCRIPTION("Aeroflex Gaisler Ethernet MAC driver");
-MODULE_LICENSE("GPL");