X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fnet%2Ffec.c;h=9f98c1c4a344e21cc558e090ee3e2be313ccd8c5;hb=3595be778d8cb887f0e0575ef0a0c1a094d120bb;hp=f8396fb3032690bb63877734151a409053e5d5a5;hpb=2e28532f7e63c3011f7b3c1516cfebd5321bdd15;p=safe%2Fjmp%2Flinux-2.6

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index f8396fb..9f98c1c 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -86,8 +86,7 @@ static unsigned char	fec_mac_default[] = {
 #endif
 #endif /* CONFIG_M5272 */
 
-/* Forward declarations of some structures to support different PHYs
-*/
+/* Forward declarations of some structures to support different PHYs */
 
 typedef struct {
 	uint mii_data;
@@ -123,8 +122,7 @@ typedef struct {
 #error "FEC: descriptor ring size constants too large"
 #endif
 
-/* Interrupt events/masks.
-*/
+/* Interrupt events/masks. */
 #define FEC_ENET_HBERR	((uint)0x80000000)	/* Heartbeat error */
 #define FEC_ENET_BABR	((uint)0x40000000)	/* Babbling receiver */
 #define FEC_ENET_BABT	((uint)0x20000000)	/* Babbling transmitter */
@@ -174,18 +172,18 @@ struct fec_enet_private {
 	/* The saved address of a sent-in-place packet/buffer, for skfree(). */
 	unsigned char *tx_bounce[TX_RING_SIZE];
 	struct	sk_buff* tx_skbuff[TX_RING_SIZE];
+	struct	sk_buff* rx_skbuff[RX_RING_SIZE];
 	ushort	skb_cur;
 	ushort	skb_dirty;
 
-	/* CPM dual port RAM relative addresses.
-	*/
+	/* CPM dual port RAM relative addresses */
 	dma_addr_t	bd_dma;
-	/* Address of Rx and Tx buffers. */
+	/* Address of Rx and Tx buffers */
 	struct bufdesc	*rx_bd_base;
 	struct bufdesc	*tx_bd_base;
 	/* The next free ring entry */
 	struct bufdesc	*cur_rx, *cur_tx; 
-	/* The ring entries to be free()ed. */
+	/* The ring entries to be free()ed */
 	struct bufdesc	*dirty_tx;
 
 	uint	tx_full;
@@ -213,17 +211,13 @@ struct fec_enet_private {
 	int	full_duplex;
 };
 
-static int fec_enet_open(struct net_device *dev);
-static int fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev);
 static void fec_enet_mii(struct net_device *dev);
 static irqreturn_t fec_enet_interrupt(int irq, void * dev_id);
 static void fec_enet_tx(struct net_device *dev);
 static void fec_enet_rx(struct net_device *dev);
 static int fec_enet_close(struct net_device *dev);
-static void set_multicast_list(struct net_device *dev);
 static void fec_restart(struct net_device *dev, int duplex);
 static void fec_stop(struct net_device *dev);
-static void fec_set_mac_address(struct net_device *dev);
 
 
 /* MII processing.  We keep this as simple as possible.  Requests are
@@ -245,19 +239,16 @@ static mii_list_t	*mii_tail;
 static int	mii_queue(struct net_device *dev, int request,
 				void (*func)(uint, struct net_device *));
 
-/* Make MII read/write commands for the FEC.
-*/
+/* Make MII read/write commands for the FEC */
 #define mk_mii_read(REG)	(0x60020000 | ((REG & 0x1f) << 18))
 #define mk_mii_write(REG, VAL)	(0x50020000 | ((REG & 0x1f) << 18) | \
 						(VAL & 0xffff))
 #define mk_mii_end	0
 
-/* Transmitter timeout.
-*/
-#define TX_TIMEOUT (2*HZ)
+/* Transmitter timeout */
+#define TX_TIMEOUT (2 * HZ)
 
-/* Register definitions for the PHY.
-*/
+/* Register definitions for the PHY */
 
 #define MII_REG_CR          0  /* Control Register                         */
 #define MII_REG_SR          1  /* Status Register                          */
@@ -294,12 +285,13 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct fec_enet_private *fep = netdev_priv(dev);
 	struct bufdesc *bdp;
+	void *bufaddr;
 	unsigned short	status;
 	unsigned long flags;
 
 	if (!fep->link) {
 		/* Link is down or autonegotiation is in progress. */
-		return 1;
+		return NETDEV_TX_BUSY;
 	}
 
 	spin_lock_irqsave(&fep->hw_lock, flags);
@@ -307,40 +299,36 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	bdp = fep->cur_tx;
 
 	status = bdp->cbd_sc;
-#ifndef final_version
+
 	if (status & BD_ENET_TX_READY) {
 		/* Ooops.  All transmit buffers are full.  Bail out.
 		 * This should not happen, since dev->tbusy should be set.
 		 */
 		printk("%s: tx queue full!.\n", dev->name);
 		spin_unlock_irqrestore(&fep->hw_lock, flags);
-		return 1;
+		return NETDEV_TX_BUSY;
 	}
-#endif
 
-	/* Clear all of the status flags.
-	 */
+	/* Clear all of the status flags */
 	status &= ~BD_ENET_TX_STATS;
 
-	/* Set buffer length and buffer pointer.
-	*/
-	bdp->cbd_bufaddr = __pa(skb->data);
+	/* Set buffer length and buffer pointer */
+	bufaddr = skb->data;
 	bdp->cbd_datlen = skb->len;
 
 	/*
-	 *	On some FEC implementations data must be aligned on
-	 *	4-byte boundaries. Use bounce buffers to copy data
-	 *	and get it aligned. Ugh.
+	 * On some FEC implementations data must be aligned on
+	 * 4-byte boundaries. Use bounce buffers to copy data
+	 * and get it aligned. Ugh.
 	 */
-	if (bdp->cbd_bufaddr & FEC_ALIGNMENT) {
+	if (((unsigned long) bufaddr) & FEC_ALIGNMENT) {
 		unsigned int index;
 		index = bdp - fep->tx_bd_base;
 		memcpy(fep->tx_bounce[index], (void *)skb->data, skb->len);
-		bdp->cbd_bufaddr = __pa(fep->tx_bounce[index]);
+		bufaddr = fep->tx_bounce[index];
 	}
 
-	/* Save skb pointer.
-	*/
+	/* Save skb pointer */
 	fep->tx_skbuff[fep->skb_cur] = skb;
 
 	dev->stats.tx_bytes += skb->len;
@@ -349,13 +337,12 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	/* Push the data cache so the CPM does not get stale memory
 	 * data.
 	 */
-	dma_sync_single(NULL, bdp->cbd_bufaddr,
-			bdp->cbd_datlen, DMA_TO_DEVICE);
+	bdp->cbd_bufaddr = dma_map_single(&dev->dev, bufaddr,
+			FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE);
 
 	/* Send it on its way.  Tell FEC it's ready, interrupt when done,
 	 * it's the last BD of the frame, and to put the CRC on the end.
 	 */
-
 	status |= (BD_ENET_TX_READY | BD_ENET_TX_INTR
 			| BD_ENET_TX_LAST | BD_ENET_TX_TC);
 	bdp->cbd_sc = status;
@@ -365,13 +352,11 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	/* Trigger transmission start */
 	writel(0, fep->hwp + FEC_X_DES_ACTIVE);
 
-	/* If this was the last BD in the ring, start at the beginning again.
-	*/
-	if (status & BD_ENET_TX_WRAP) {
+	/* If this was the last BD in the ring, start at the beginning again. */
+	if (status & BD_ENET_TX_WRAP)
 		bdp = fep->tx_bd_base;
-	} else {
+	else
 		bdp++;
-	}
 
 	if (bdp == fep->dirty_tx) {
 		fep->tx_full = 1;
@@ -382,7 +367,7 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	spin_unlock_irqrestore(&fep->hw_lock, flags);
 
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 static void
@@ -390,48 +375,12 @@ fec_timeout(struct net_device *dev)
 {
 	struct fec_enet_private *fep = netdev_priv(dev);
 
-	printk("%s: transmit timed out.\n", dev->name);
 	dev->stats.tx_errors++;
-#ifndef final_version
-	{
-	int	i;
-	struct bufdesc *bdp;
-
-	printk("Ring data dump: cur_tx %lx%s, dirty_tx %lx cur_rx: %lx\n",
-	       (unsigned long)fep->cur_tx, fep->tx_full ? " (full)" : "",
-	       (unsigned long)fep->dirty_tx,
-	       (unsigned long)fep->cur_rx);
-
-	bdp = fep->tx_bd_base;
-	printk(" tx: %u buffers\n",  TX_RING_SIZE);
-	for (i = 0 ; i < TX_RING_SIZE; i++) {
-		printk("  %08x: %04x %04x %08x\n",
-		       (uint) bdp,
-		       bdp->cbd_sc,
-		       bdp->cbd_datlen,
-		       (int) bdp->cbd_bufaddr);
-		bdp++;
-	}
 
-	bdp = fep->rx_bd_base;
-	printk(" rx: %lu buffers\n",  (unsigned long) RX_RING_SIZE);
-	for (i = 0 ; i < RX_RING_SIZE; i++) {
-		printk("  %08x: %04x %04x %08x\n",
-		       (uint) bdp,
-		       bdp->cbd_sc,
-		       bdp->cbd_datlen,
-		       (int) bdp->cbd_bufaddr);
-		bdp++;
-	}
-	}
-#endif
 	fec_restart(dev, fep->full_duplex);
 	netif_wake_queue(dev);
 }
 
-/* The interrupt handler.
- * This is called from the MPC core interrupt.
- */
 static irqreturn_t
 fec_enet_interrupt(int irq, void * dev_id)
 {
@@ -440,12 +389,10 @@ fec_enet_interrupt(int irq, void * dev_id)
 	uint	int_events;
 	irqreturn_t ret = IRQ_NONE;
 
-	/* Get the interrupt events that caused us to be here. */
 	do {
 		int_events = readl(fep->hwp + FEC_IEVENT);
 		writel(int_events, fep->hwp + FEC_IEVENT);
 
-		/* Handle receive event in its own function. */
 		if (int_events & FEC_ENET_RXF) {
 			ret = IRQ_HANDLED;
 			fec_enet_rx(dev);
@@ -480,11 +427,15 @@ fec_enet_tx(struct net_device *dev)
 	struct	sk_buff	*skb;
 
 	fep = netdev_priv(dev);
-	spin_lock_irq(&fep->hw_lock);
+	spin_lock(&fep->hw_lock);
 	bdp = fep->dirty_tx;
 
 	while (((status = bdp->cbd_sc) & BD_ENET_TX_READY) == 0) {
-		if (bdp == fep->cur_tx && fep->tx_full == 0) break;
+		if (bdp == fep->cur_tx && fep->tx_full == 0)
+			break;
+
+		dma_unmap_single(&dev->dev, bdp->cbd_bufaddr, FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE);
+		bdp->cbd_bufaddr = 0;
 
 		skb = fep->tx_skbuff[fep->skb_dirty];
 		/* Check for errors. */
@@ -506,31 +457,27 @@ fec_enet_tx(struct net_device *dev)
 			dev->stats.tx_packets++;
 		}
 
-#ifndef final_version
 		if (status & BD_ENET_TX_READY)
 			printk("HEY! Enet xmit interrupt and TX_READY.\n");
-#endif
+
 		/* Deferred means some collisions occurred during transmit,
 		 * but we eventually sent the packet OK.
 		 */
 		if (status & BD_ENET_TX_DEF)
 			dev->stats.collisions++;
 
-		/* Free the sk buffer associated with this last transmit.
-		 */
+		/* Free the sk buffer associated with this last transmit */
 		dev_kfree_skb_any(skb);
 		fep->tx_skbuff[fep->skb_dirty] = NULL;
 		fep->skb_dirty = (fep->skb_dirty + 1) & TX_RING_MOD_MASK;
 
-		/* Update pointer to next buffer descriptor to be transmitted.
-		 */
+		/* Update pointer to next buffer descriptor to be transmitted */
 		if (status & BD_ENET_TX_WRAP)
 			bdp = fep->tx_bd_base;
 		else
 			bdp++;
 
-		/* Since we have freed up a buffer, the ring is no longer
-		 * full.
+		/* Since we have freed up a buffer, the ring is no longer full
 		 */
 		if (fep->tx_full) {
 			fep->tx_full = 0;
@@ -539,7 +486,7 @@ fec_enet_tx(struct net_device *dev)
 		}
 	}
 	fep->dirty_tx = bdp;
-	spin_unlock_irq(&fep->hw_lock);
+	spin_unlock(&fep->hw_lock);
 }
 
 
@@ -562,121 +509,104 @@ fec_enet_rx(struct net_device *dev)
 	flush_cache_all();
 #endif
 
-	spin_lock_irq(&fep->hw_lock);
+	spin_lock(&fep->hw_lock);
 
 	/* First, grab all of the stats for the incoming packet.
 	 * These get messed up if we get called due to a busy condition.
 	 */
 	bdp = fep->cur_rx;
 
-while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) {
+	while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) {
 
-#ifndef final_version
-	/* Since we have allocated space to hold a complete frame,
-	 * the last indicator should be set.
-	 */
-	if ((status & BD_ENET_RX_LAST) == 0)
-		printk("FEC ENET: rcv is not +last\n");
-#endif
+		/* Since we have allocated space to hold a complete frame,
+		 * the last indicator should be set.
+		 */
+		if ((status & BD_ENET_RX_LAST) == 0)
+			printk("FEC ENET: rcv is not +last\n");
 
-	if (!fep->opened)
-		goto rx_processing_done;
+		if (!fep->opened)
+			goto rx_processing_done;
 
-	/* Check for errors. */
-	if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
+		/* Check for errors. */
+		if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
 			   BD_ENET_RX_CR | BD_ENET_RX_OV)) {
-		dev->stats.rx_errors++;
-		if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) {
-		/* Frame too long or too short. */
-			dev->stats.rx_length_errors++;
+			dev->stats.rx_errors++;
+			if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) {
+				/* Frame too long or too short. */
+				dev->stats.rx_length_errors++;
+			}
+			if (status & BD_ENET_RX_NO)	/* Frame alignment */
+				dev->stats.rx_frame_errors++;
+			if (status & BD_ENET_RX_CR)	/* CRC Error */
+				dev->stats.rx_crc_errors++;
+			if (status & BD_ENET_RX_OV)	/* FIFO overrun */
+				dev->stats.rx_fifo_errors++;
 		}
-		if (status & BD_ENET_RX_NO)	/* Frame alignment */
+
+		/* Report late collisions as a frame error.
+		 * On this error, the BD is closed, but we don't know what we
+		 * have in the buffer.  So, just drop this frame on the floor.
+		 */
+		if (status & BD_ENET_RX_CL) {
+			dev->stats.rx_errors++;
 			dev->stats.rx_frame_errors++;
-		if (status & BD_ENET_RX_CR)	/* CRC Error */
-			dev->stats.rx_crc_errors++;
-		if (status & BD_ENET_RX_OV)	/* FIFO overrun */
-			dev->stats.rx_fifo_errors++;
-	}
+			goto rx_processing_done;
+		}
 
-	/* Report late collisions as a frame error.
-	 * On this error, the BD is closed, but we don't know what we
-	 * have in the buffer.  So, just drop this frame on the floor.
-	 */
-	if (status & BD_ENET_RX_CL) {
-		dev->stats.rx_errors++;
-		dev->stats.rx_frame_errors++;
-		goto rx_processing_done;
-	}
+		/* Process the incoming frame. */
+		dev->stats.rx_packets++;
+		pkt_len = bdp->cbd_datlen;
+		dev->stats.rx_bytes += pkt_len;
+		data = (__u8*)__va(bdp->cbd_bufaddr);
 
-	/* Process the incoming frame.
-	 */
-	dev->stats.rx_packets++;
-	pkt_len = bdp->cbd_datlen;
-	dev->stats.rx_bytes += pkt_len;
-	data = (__u8*)__va(bdp->cbd_bufaddr);
-
-	dma_sync_single(NULL, (unsigned long)__pa(data),
-			pkt_len - 4, DMA_FROM_DEVICE);
-
-	/* This does 16 byte alignment, exactly what we need.
-	 * The packet length includes FCS, but we don't want to
-	 * include that when passing upstream as it messes up
-	 * bridging applications.
-	 */
-	skb = dev_alloc_skb(pkt_len-4);
+	        dma_unmap_single(NULL, bdp->cbd_bufaddr, bdp->cbd_datlen,
+        			DMA_FROM_DEVICE);
 
-	if (skb == NULL) {
-		printk("%s: Memory squeeze, dropping packet.\n", dev->name);
-		dev->stats.rx_dropped++;
-	} else {
-		skb_put(skb,pkt_len-4);	/* Make room */
-		skb_copy_to_linear_data(skb, data, pkt_len-4);
-		skb->protocol=eth_type_trans(skb,dev);
-		netif_rx(skb);
-	}
-  rx_processing_done:
+		/* This does 16 byte alignment, exactly what we need.
+		 * The packet length includes FCS, but we don't want to
+		 * include that when passing upstream as it messes up
+		 * bridging applications.
+		 */
+		skb = dev_alloc_skb(pkt_len - 4 + NET_IP_ALIGN);
 
-	/* Clear the status flags for this buffer.
-	*/
-	status &= ~BD_ENET_RX_STATS;
+		if (unlikely(!skb)) {
+			printk("%s: Memory squeeze, dropping packet.\n",
+					dev->name);
+			dev->stats.rx_dropped++;
+		} else {
+			skb_reserve(skb, NET_IP_ALIGN);
+			skb_put(skb, pkt_len - 4);	/* Make room */
+			skb_copy_to_linear_data(skb, data, pkt_len - 4);
+			skb->protocol = eth_type_trans(skb, dev);
+			netif_rx(skb);
+		}
 
-	/* Mark the buffer empty.
-	*/
-	status |= BD_ENET_RX_EMPTY;
-	bdp->cbd_sc = status;
+        	bdp->cbd_bufaddr = dma_map_single(NULL, data, bdp->cbd_datlen,
+			DMA_FROM_DEVICE);
+rx_processing_done:
+		/* Clear the status flags for this buffer */
+		status &= ~BD_ENET_RX_STATS;
 
-	/* Update BD pointer to next entry.
-	*/
-	if (status & BD_ENET_RX_WRAP)
-		bdp = fep->rx_bd_base;
-	else
-		bdp++;
+		/* Mark the buffer empty */
+		status |= BD_ENET_RX_EMPTY;
+		bdp->cbd_sc = status;
 
-#if 1
-	/* Doing this here will keep the FEC running while we process
-	 * incoming frames.  On a heavily loaded network, we should be
-	 * able to keep up at the expense of system resources.
-	 */
-	writel(0, fep->hwp + FEC_R_DES_ACTIVE);
-#endif
-   } /* while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) */
+		/* Update BD pointer to next entry */
+		if (status & BD_ENET_RX_WRAP)
+			bdp = fep->rx_bd_base;
+		else
+			bdp++;
+		/* Doing this here will keep the FEC running while we process
+		 * incoming frames.  On a heavily loaded network, we should be
+		 * able to keep up at the expense of system resources.
+		 */
+		writel(0, fep->hwp + FEC_R_DES_ACTIVE);
+	}
 	fep->cur_rx = bdp;
 
-#if 0
-	/* Doing this here will allow us to process all frames in the
-	 * ring before the FEC is allowed to put more there.  On a heavily
-	 * loaded network, some frames may be lost.  Unfortunately, this
-	 * increases the interrupt overhead since we can potentially work
-	 * our way back to the interrupt return only to come right back
-	 * here.
-	 */
-	fecp->fec_r_des_active = 0;
-#endif
-
-	spin_unlock_irq(&fep->hw_lock);
+	spin_unlock(&fep->hw_lock);
 }
 
-
 /* called from interrupt context */
 static void
 fec_enet_mii(struct net_device *dev)
@@ -685,7 +615,7 @@ fec_enet_mii(struct net_device *dev)
 	mii_list_t	*mip;
 
 	fep = netdev_priv(dev);
-	spin_lock_irq(&fep->mii_lock);
+	spin_lock(&fep->mii_lock);
 
 	if ((mip = mii_head) == NULL) {
 		printk("MII and no head!\n");
@@ -703,21 +633,19 @@ fec_enet_mii(struct net_device *dev)
 		writel(mip->mii_regval, fep->hwp + FEC_MII_DATA);
 
 unlock:
-	spin_unlock_irq(&fep->mii_lock);
+	spin_unlock(&fep->mii_lock);
 }
 
 static int
-mii_queue(struct net_device *dev, int regval, void (*func)(uint, struct net_device *))
+mii_queue_unlocked(struct net_device *dev, int regval,
+		void (*func)(uint, struct net_device *))
 {
 	struct fec_enet_private *fep;
-	unsigned long	flags;
 	mii_list_t	*mip;
 	int		retval;
 
-	/* Add PHY address to register command.
-	*/
+	/* Add PHY address to register command */
 	fep = netdev_priv(dev);
-	spin_lock_irqsave(&fep->mii_lock, flags);
 
 	regval |= fep->phy_addr << 23;
 	retval = 0;
@@ -738,6 +666,19 @@ mii_queue(struct net_device *dev, int regval, void (*func)(uint, struct net_devi
 		retval = 1;
 	}
 
+	return retval;
+}
+
+static int
+mii_queue(struct net_device *dev, int regval,
+		void (*func)(uint, struct net_device *))
+{
+	struct fec_enet_private *fep;
+	unsigned long   flags;
+	int             retval;
+	fep = netdev_priv(dev);
+	spin_lock_irqsave(&fep->mii_lock, flags);
+	retval = mii_queue_unlocked(dev, regval, func);
 	spin_unlock_irqrestore(&fep->mii_lock, flags);
 	return retval;
 }
@@ -1187,6 +1128,26 @@ static phy_info_t phy_info_dp83848= {
 	},
 };
 
+static phy_info_t phy_info_lan8700 = {
+	0x0007C0C,
+	"LAN8700",
+	(const phy_cmd_t []) { /* config */
+		{ mk_mii_read(MII_REG_CR), mii_parse_cr },
+		{ mk_mii_read(MII_REG_ANAR), mii_parse_anar },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) { /* startup */
+		{ mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
+		{ mk_mii_read(MII_REG_SR), mii_parse_sr },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) { /* act_int */
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) { /* shutdown */
+		{ mk_mii_end, }
+	},
+};
 /* ------------------------------------------------------------------------- */
 
 static phy_info_t const * const phy_info[] = {
@@ -1196,6 +1157,7 @@ static phy_info_t const * const phy_info[] = {
 	&phy_info_am79c874,
 	&phy_info_ks8721bl,
 	&phy_info_dp83848,
+	&phy_info_lan8700,
 	NULL
 };
 
@@ -1213,20 +1175,11 @@ static void __inline__ fec_request_mii_intr(struct net_device *dev)
 		printk("FEC: Could not allocate fec(MII) IRQ(66)!\n");
 }
 
-static void __inline__ fec_disable_phy_intr(void)
-{
-	volatile unsigned long *icrp;
-	icrp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_ICR1);
-	*icrp = 0x08000000;
-}
-
-static void __inline__ fec_phy_ack_intr(void)
+static void __inline__ fec_disable_phy_intr(struct net_device *dev)
 {
-	volatile unsigned long *icrp;
-	/* Acknowledge the interrupt */
-	icrp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_ICR1);
-	*icrp = 0x0d000000;
+	free_irq(66, dev);
 }
+#endif
 
 #ifdef CONFIG_M5272
 static void __inline__ fec_get_mac(struct net_device *dev)
@@ -1358,11 +1311,6 @@ static void mii_relink(struct work_struct *work)
 		fec_restart(dev, duplex);
 	} else
 		fec_stop(dev);
-
-#if 0
-	enable_irq(fep->mii_irq);
-#endif
-
 }
 
 /* mii_queue_relink is called in interrupt context from mii_link_interrupt */
@@ -1371,12 +1319,12 @@ static void mii_queue_relink(uint mii_reg, struct net_device *dev)
 	struct fec_enet_private *fep = netdev_priv(dev);
 
 	/*
-	** We cannot queue phy_task twice in the workqueue.  It
-	** would cause an endless loop in the workqueue.
-	** Fortunately, if the last mii_relink entry has not yet been
-	** executed now, it will do the job for the current interrupt,
-	** which is just what we want.
-	*/
+	 * We cannot queue phy_task twice in the workqueue.  It
+	 * would cause an endless loop in the workqueue.
+	 * Fortunately, if the last mii_relink entry has not yet been
+	 * executed now, it will do the job for the current interrupt,
+	 * which is just what we want.
+	 */
 	if (fep->mii_phy_task_queued)
 		return;
 
@@ -1407,8 +1355,7 @@ phy_cmd_t const phy_cmd_config[] = {
 	{ mk_mii_end, }
 	};
 
-/* Read remainder of PHY ID.
-*/
+/* Read remainder of PHY ID. */
 static void
 mii_discover_phy3(uint mii_reg, struct net_device *dev)
 {
@@ -1447,14 +1394,13 @@ mii_discover_phy(uint mii_reg, struct net_device *dev)
 	if (fep->phy_addr < 32) {
 		if ((phytype = (mii_reg & 0xffff)) != 0xffff && phytype != 0) {
 
-			/* Got first part of ID, now get remainder.
-			*/
+			/* Got first part of ID, now get remainder */
 			fep->phy_id = phytype << 16;
-			mii_queue(dev, mk_mii_read(MII_REG_PHYIR2),
+			mii_queue_unlocked(dev, mk_mii_read(MII_REG_PHYIR2),
 							mii_discover_phy3);
 		} else {
 			fep->phy_addr++;
-			mii_queue(dev, mk_mii_read(MII_REG_PHYIR1),
+			mii_queue_unlocked(dev, mk_mii_read(MII_REG_PHYIR1),
 							mii_discover_phy);
 		}
 	} else {
@@ -1463,13 +1409,12 @@ mii_discover_phy(uint mii_reg, struct net_device *dev)
 		writel(0, fep->hwp + FEC_MII_SPEED);
 		fep->phy_speed = 0;
 #ifdef HAVE_mii_link_interrupt
-		fec_disable_phy_intr();
+		fec_disable_phy_intr(dev);
 #endif
 	}
 }
 
-/* This interrupt occurs when the PHY detects a link change.
-*/
+/* This interrupt occurs when the PHY detects a link change */
 #ifdef HAVE_mii_link_interrupt
 static irqreturn_t
 mii_link_interrupt(int irq, void * dev_id)
@@ -1477,12 +1422,6 @@ mii_link_interrupt(int irq, void * dev_id)
 	struct	net_device *dev = dev_id;
 	struct fec_enet_private *fep = netdev_priv(dev);
 
-	fec_phy_ack_intr();
-
-#if 0
-	disable_irq(fep->mii_irq);  /* disable now, enable later */
-#endif
-
 	mii_do_cmd(dev, fep->phy->ack_int);
 	mii_do_cmd(dev, phy_cmd_relink);  /* restart and display status */
 
@@ -1490,19 +1429,91 @@ mii_link_interrupt(int irq, void * dev_id)
 }
 #endif
 
+static void fec_enet_free_buffers(struct net_device *dev)
+{
+	struct fec_enet_private *fep = netdev_priv(dev);
+	int i;
+	struct sk_buff *skb;
+	struct bufdesc	*bdp;
+
+	bdp = fep->rx_bd_base;
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		skb = fep->rx_skbuff[i];
+
+		if (bdp->cbd_bufaddr)
+			dma_unmap_single(&dev->dev, bdp->cbd_bufaddr,
+					FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
+		if (skb)
+			dev_kfree_skb(skb);
+		bdp++;
+	}
+
+	bdp = fep->tx_bd_base;
+	for (i = 0; i < TX_RING_SIZE; i++)
+		kfree(fep->tx_bounce[i]);
+}
+
+static int fec_enet_alloc_buffers(struct net_device *dev)
+{
+	struct fec_enet_private *fep = netdev_priv(dev);
+	int i;
+	struct sk_buff *skb;
+	struct bufdesc	*bdp;
+
+	bdp = fep->rx_bd_base;
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		skb = dev_alloc_skb(FEC_ENET_RX_FRSIZE);
+		if (!skb) {
+			fec_enet_free_buffers(dev);
+			return -ENOMEM;
+		}
+		fep->rx_skbuff[i] = skb;
+
+		bdp->cbd_bufaddr = dma_map_single(&dev->dev, skb->data,
+				FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
+		bdp->cbd_sc = BD_ENET_RX_EMPTY;
+		bdp++;
+	}
+
+	/* Set the last buffer to wrap. */
+	bdp--;
+	bdp->cbd_sc |= BD_SC_WRAP;
+
+	bdp = fep->tx_bd_base;
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		fep->tx_bounce[i] = kmalloc(FEC_ENET_TX_FRSIZE, GFP_KERNEL);
+
+		bdp->cbd_sc = 0;
+		bdp->cbd_bufaddr = 0;
+		bdp++;
+	}
+
+	/* Set the last buffer to wrap. */
+	bdp--;
+	bdp->cbd_sc |= BD_SC_WRAP;
+
+	return 0;
+}
+
 static int
 fec_enet_open(struct net_device *dev)
 {
 	struct fec_enet_private *fep = netdev_priv(dev);
+	int ret;
 
 	/* I should reset the ring buffers here, but I don't yet know
 	 * a simple way to do that.
 	 */
-	fec_set_mac_address(dev);
+
+	ret = fec_enet_alloc_buffers(dev);
+	if (ret)
+		return ret;
 
 	fep->sequence_done = 0;
 	fep->link = 0;
 
+	fec_restart(dev, 1);
+
 	if (fep->phy) {
 		mii_do_cmd(dev, fep->phy->ack_int);
 		mii_do_cmd(dev, fep->phy->config);
@@ -1519,21 +1530,17 @@ fec_enet_open(struct net_device *dev)
 			schedule();
 
 		mii_do_cmd(dev, fep->phy->startup);
-
-		/* Set the initial link state to true. A lot of hardware
-		 * based on this device does not implement a PHY interrupt,
-		 * so we are never notified of link change.
-		 */
-		fep->link = 1;
-	} else {
-		fep->link = 1; /* lets just try it and see */
-		/* no phy,  go full duplex,  it's most likely a hub chip */
-		fec_restart(dev, 1);
 	}
 
+	/* Set the initial link state to true. A lot of hardware
+	 * based on this device does not implement a PHY interrupt,
+	 * so we are never notified of link change.
+	 */
+	fep->link = 1;
+
 	netif_start_queue(dev);
 	fep->opened = 1;
-	return 0;		/* Success */
+	return 0;
 }
 
 static int
@@ -1541,12 +1548,13 @@ fec_enet_close(struct net_device *dev)
 {
 	struct fec_enet_private *fep = netdev_priv(dev);
 
-	/* Don't know what to do yet.
-	*/
+	/* Don't know what to do yet. */
 	fep->opened = 0;
 	netif_stop_queue(dev);
 	fec_stop(dev);
 
+        fec_enet_free_buffers(dev);
+
 	return 0;
 }
 
@@ -1567,104 +1575,115 @@ static void set_multicast_list(struct net_device *dev)
 {
 	struct fec_enet_private *fep = netdev_priv(dev);
 	struct dev_mc_list *dmi;
-	unsigned int i, j, bit, data, crc, tmp;
+	unsigned int i, bit, data, crc, tmp;
 	unsigned char hash;
 
-	if (dev->flags&IFF_PROMISC) {
+	if (dev->flags & IFF_PROMISC) {
 		tmp = readl(fep->hwp + FEC_R_CNTRL);
 		tmp |= 0x8;
 		writel(tmp, fep->hwp + FEC_R_CNTRL);
-	} else {
-		tmp = readl(fep->hwp + FEC_R_CNTRL);
-		tmp &= ~0x8;
-		writel(tmp, fep->hwp + FEC_R_CNTRL);
+		return;
+	}
 
-		if (dev->flags & IFF_ALLMULTI) {
-			/* Catch all multicast addresses, so set the
-			 * filter to all 1's.
-			 */
-			writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-			writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
-		} else {
-			/* Clear filter and add the addresses in hash register.
-			*/
-			writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-			writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
-
-			dmi = dev->mc_list;
-
-			for (j = 0; j < dev->mc_count; j++, dmi = dmi->next)
-			{
-				/* Only support group multicast for now.
-				*/
-				if (!(dmi->dmi_addr[0] & 1))
-					continue;
-
-				/* calculate crc32 value of mac address
-				*/
-				crc = 0xffffffff;
-
-				for (i = 0; i < dmi->dmi_addrlen; i++)
-				{
-					data = dmi->dmi_addr[i];
-					for (bit = 0; bit < 8; bit++, data >>= 1)
-					{
-						crc = (crc >> 1) ^
-						(((crc ^ data) & 1) ? CRC32_POLY : 0);
-					}
-				}
-
-				/* only upper 6 bits (HASH_BITS) are used
-				   which point to specific bit in he hash registers
-				*/
-				hash = (crc >> (32 - HASH_BITS)) & 0x3f;
-
-				if (hash > 31) {
-					tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-					tmp |= 1 << (hash - 32);
-					writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-				} else {
-					tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_LOW);
-					tmp |= 1 << hash;
-					writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
-				}
+	tmp = readl(fep->hwp + FEC_R_CNTRL);
+	tmp &= ~0x8;
+	writel(tmp, fep->hwp + FEC_R_CNTRL);
+
+	if (dev->flags & IFF_ALLMULTI) {
+		/* Catch all multicast addresses, so set the
+		 * filter to all 1's
+		 */
+		writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
+		writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
+
+		return;
+	}
+
+	/* Clear filter and add the addresses in hash register
+	 */
+	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
+	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
+
+	netdev_for_each_mc_addr(dmi, dev) {
+		/* Only support group multicast for now */
+		if (!(dmi->dmi_addr[0] & 1))
+			continue;
+
+		/* calculate crc32 value of mac address */
+		crc = 0xffffffff;
+
+		for (i = 0; i < dmi->dmi_addrlen; i++) {
+			data = dmi->dmi_addr[i];
+			for (bit = 0; bit < 8; bit++, data >>= 1) {
+				crc = (crc >> 1) ^
+				(((crc ^ data) & 1) ? CRC32_POLY : 0);
 			}
 		}
+
+		/* only upper 6 bits (HASH_BITS) are used
+		 * which point to specific bit in he hash registers
+		 */
+		hash = (crc >> (32 - HASH_BITS)) & 0x3f;
+
+		if (hash > 31) {
+			tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
+			tmp |= 1 << (hash - 32);
+			writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
+		} else {
+			tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_LOW);
+			tmp |= 1 << hash;
+			writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
+		}
 	}
 }
 
-/* Set a MAC change in hardware.
- */
-static void
-fec_set_mac_address(struct net_device *dev)
+/* Set a MAC change in hardware. */
+static int
+fec_set_mac_address(struct net_device *dev, void *p)
 {
 	struct fec_enet_private *fep = netdev_priv(dev);
+	struct sockaddr *addr = p;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
 
-	/* Set station address. */
 	writel(dev->dev_addr[3] | (dev->dev_addr[2] << 8) |
 		(dev->dev_addr[1] << 16) | (dev->dev_addr[0] << 24),
 		fep->hwp + FEC_ADDR_LOW);
 	writel((dev->dev_addr[5] << 16) | (dev->dev_addr[4] << 24),
 		fep + FEC_ADDR_HIGH);
+	return 0;
 }
 
+static const struct net_device_ops fec_netdev_ops = {
+	.ndo_open		= fec_enet_open,
+	.ndo_stop		= fec_enet_close,
+	.ndo_start_xmit		= fec_enet_start_xmit,
+	.ndo_set_multicast_list = set_multicast_list,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_tx_timeout		= fec_timeout,
+	.ndo_set_mac_address	= fec_set_mac_address,
+};
+
  /*
   * XXX:  We need to clean up on failure exits here.
   *
   * index is only used in legacy code
   */
-int __init fec_enet_init(struct net_device *dev, int index)
+static int fec_enet_init(struct net_device *dev, int index)
 {
 	struct fec_enet_private *fep = netdev_priv(dev);
-	unsigned long	mem_addr;
-	struct bufdesc *bdp, *cbd_base;
-	int 		i, j;
+	struct bufdesc *cbd_base;
+	struct bufdesc *bdp;
+	int i;
 
-	/* Allocate memory for buffer descriptors.
-	*/
-	mem_addr = (unsigned long)dma_alloc_coherent(NULL, PAGE_SIZE,
-			&fep->bd_dma, GFP_KERNEL);
-	if (mem_addr == 0) {
+	/* Allocate memory for buffer descriptors. */
+	cbd_base = dma_alloc_coherent(NULL, PAGE_SIZE, &fep->bd_dma,
+			GFP_KERNEL);
+	if (!cbd_base) {
 		printk("FEC: allocate descriptor memory failed?\n");
 		return -ENOMEM;
 	}
@@ -1676,11 +1695,6 @@ int __init fec_enet_init(struct net_device *dev, int index)
 	fep->hwp = (void __iomem *)dev->base_addr;
 	fep->netdev = dev;
 
-	/* Whack a reset.  We should wait for this.
-	*/
-	writel(1, fep->hwp + FEC_ECNTRL);
-	udelay(10);
-
 	/* Set the Ethernet address */
 #ifdef CONFIG_M5272
 	fec_get_mac(dev);
@@ -1698,117 +1712,54 @@ int __init fec_enet_init(struct net_device *dev, int index)
 	}
 #endif
 
-	cbd_base = (struct bufdesc *)mem_addr;
-
-	/* Set receive and transmit descriptor base.
-	*/
+	/* Set receive and transmit descriptor base. */
 	fep->rx_bd_base = cbd_base;
 	fep->tx_bd_base = cbd_base + RX_RING_SIZE;
 
-	fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
-	fep->cur_rx = fep->rx_bd_base;
+#ifdef HAVE_mii_link_interrupt
+	fec_request_mii_intr(dev);
+#endif
+	/* The FEC Ethernet specific entries in the device structure */
+	dev->watchdog_timeo = TX_TIMEOUT;
+	dev->netdev_ops = &fec_netdev_ops;
 
-	fep->skb_cur = fep->skb_dirty = 0;
+	for (i=0; i<NMII-1; i++)
+		mii_cmds[i].mii_next = &mii_cmds[i+1];
+	mii_free = mii_cmds;
 
-	/* Initialize the receive buffer descriptors.
-	*/
+	/* Set MII speed to 2.5 MHz */
+	fep->phy_speed = ((((clk_get_rate(fep->clk) / 2 + 4999999)
+					/ 2500000) / 2) & 0x3F) << 1;
+
+	/* Initialize the receive buffer descriptors. */
 	bdp = fep->rx_bd_base;
-	for (i=0; i<FEC_ENET_RX_PAGES; i++) {
-
-		/* Allocate a page.
-		*/
-		mem_addr = __get_free_page(GFP_KERNEL);
-		/* XXX: missing check for allocation failure */
-
-		/* Initialize the BD for every fragment in the page.
-		*/
-		for (j=0; j<FEC_ENET_RX_FRPPG; j++) {
-			bdp->cbd_sc = BD_ENET_RX_EMPTY;
-			bdp->cbd_bufaddr = __pa(mem_addr);
-			mem_addr += FEC_ENET_RX_FRSIZE;
-			bdp++;
-		}
+	for (i = 0; i < RX_RING_SIZE; i++) {
+
+		/* Initialize the BD for every fragment in the page. */
+		bdp->cbd_sc = 0;
+		bdp++;
 	}
 
-	/* Set the last buffer to wrap.
-	*/
+	/* Set the last buffer to wrap */
 	bdp--;
 	bdp->cbd_sc |= BD_SC_WRAP;
 
-	/* ...and the same for transmmit.
-	*/
+	/* ...and the same for transmit */
 	bdp = fep->tx_bd_base;
-	for (i=0, j=FEC_ENET_TX_FRPPG; i<TX_RING_SIZE; i++) {
-		if (j >= FEC_ENET_TX_FRPPG) {
-			mem_addr = __get_free_page(GFP_KERNEL);
-			j = 1;
-		} else {
-			mem_addr += FEC_ENET_TX_FRSIZE;
-			j++;
-		}
-		fep->tx_bounce[i] = (unsigned char *) mem_addr;
+	for (i = 0; i < TX_RING_SIZE; i++) {
 
-		/* Initialize the BD for every fragment in the page.
-		*/
+		/* Initialize the BD for every fragment in the page. */
 		bdp->cbd_sc = 0;
 		bdp->cbd_bufaddr = 0;
 		bdp++;
 	}
 
-	/* Set the last buffer to wrap.
-	*/
+	/* Set the last buffer to wrap */
 	bdp--;
 	bdp->cbd_sc |= BD_SC_WRAP;
 
-	/* Set receive and transmit descriptor base.
-	*/
-	writel(fep->bd_dma, fep->hwp + FEC_R_DES_START);
-	writel((unsigned long)fep->bd_dma + sizeof(struct bufdesc) * RX_RING_SIZE,
-			fep->hwp + FEC_X_DES_START);
-
-#ifdef HAVE_mii_link_interrupt
-	fec_request_mii_intr(dev);
-#endif
-
-	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
-	writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE);
-	writel(2, fep->hwp + FEC_ECNTRL);
-	writel(0, fep->hwp + FEC_R_DES_ACTIVE);
-#ifndef CONFIG_M5272
-	writel(0, fep->hwp + FEC_HASH_TABLE_HIGH);
-	writel(0, fep->hwp + FEC_HASH_TABLE_LOW);
-#endif
-
-	/* The FEC Ethernet specific entries in the device structure. */
-	dev->open = fec_enet_open;
-	dev->hard_start_xmit = fec_enet_start_xmit;
-	dev->tx_timeout = fec_timeout;
-	dev->watchdog_timeo = TX_TIMEOUT;
-	dev->stop = fec_enet_close;
-	dev->set_multicast_list = set_multicast_list;
-
-	for (i=0; i<NMII-1; i++)
-		mii_cmds[i].mii_next = &mii_cmds[i+1];
-	mii_free = mii_cmds;
-
-	/* setup MII interface */
-	writel(OPT_FRAME_SIZE | 0x04, fep->hwp + FEC_R_CNTRL);
-	writel(0, fep->hwp + FEC_X_CNTRL);
-
-	/*
-	 * Set MII speed to 2.5 MHz
-	 */
-	fep->phy_speed = ((((clk_get_rate(fep->clk) / 2 + 4999999)
-					/ 2500000) / 2) & 0x3F) << 1;
-	writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
 	fec_restart(dev, 0);
 
-	/* Clear and enable interrupts */
-	writel(0xffc00000, fep->hwp + FEC_IEVENT);
-	writel(FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII,
-			fep->hwp + FEC_IMASK);
-
 	/* Queue up command to detect the PHY and initialize the
 	 * remainder of the interface.
 	 */
@@ -1827,7 +1778,6 @@ static void
 fec_restart(struct net_device *dev, int duplex)
 {
 	struct fec_enet_private *fep = netdev_priv(dev);
-	struct bufdesc *bdp;
 	int i;
 
 	/* Whack a reset.  We should wait for this. */
@@ -1837,12 +1787,13 @@ fec_restart(struct net_device *dev, int duplex)
 	/* Clear any outstanding interrupt. */
 	writel(0xffc00000, fep->hwp + FEC_IEVENT);
 
-	/* Set station address.	*/
-	fec_set_mac_address(dev);
-
 	/* Reset all multicast.	*/
 	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
 	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
+#ifndef CONFIG_M5272
+	writel(0, fep->hwp + FEC_HASH_TABLE_HIGH);
+	writel(0, fep->hwp + FEC_HASH_TABLE_LOW);
+#endif
 
 	/* Set maximum receive buffer size. */
 	writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE);
@@ -1857,41 +1808,14 @@ fec_restart(struct net_device *dev, int duplex)
 
 	/* Reset SKB transmit buffers. */
 	fep->skb_cur = fep->skb_dirty = 0;
-	for (i=0; i<=TX_RING_MOD_MASK; i++) {
-		if (fep->tx_skbuff[i] != NULL) {
+	for (i = 0; i <= TX_RING_MOD_MASK; i++) {
+		if (fep->tx_skbuff[i]) {
 			dev_kfree_skb_any(fep->tx_skbuff[i]);
 			fep->tx_skbuff[i] = NULL;
 		}
 	}
 
-	/* Initialize the receive buffer descriptors. */
-	bdp = fep->rx_bd_base;
-	for (i=0; i<RX_RING_SIZE; i++) {
-
-		/* Initialize the BD for every fragment in the page. */
-		bdp->cbd_sc = BD_ENET_RX_EMPTY;
-		bdp++;
-	}
-
-	/* Set the last buffer to wrap. */
-	bdp--;
-	bdp->cbd_sc |= BD_SC_WRAP;
-
-	/* ...and the same for transmmit. */
-	bdp = fep->tx_bd_base;
-	for (i=0; i<TX_RING_SIZE; i++) {
-
-		/* Initialize the BD for every fragment in the page. */
-		bdp->cbd_sc = 0;
-		bdp->cbd_bufaddr = 0;
-		bdp++;
-	}
-
-	/* Set the last buffer to wrap. */
-	bdp--;
-	bdp->cbd_sc |= BD_SC_WRAP;
-
-	/* Enable MII mode. */
+	/* Enable MII mode */
 	if (duplex) {
 		/* MII enable / FD enable */
 		writel(OPT_FRAME_SIZE | 0x04, fep->hwp + FEC_R_CNTRL);
@@ -1903,14 +1827,14 @@ fec_restart(struct net_device *dev, int duplex)
 	}
 	fep->full_duplex = duplex;
 
-	/* Set MII speed. */
+	/* Set MII speed */
 	writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
 
-	/* And last, enable the transmit and receive processing. */
+	/* And last, enable the transmit and receive processing */
 	writel(2, fep->hwp + FEC_ECNTRL);
 	writel(0, fep->hwp + FEC_R_DES_ACTIVE);
 
-	/* Enable interrupts we wish to service. */
+	/* Enable interrupts we wish to service */
 	writel(FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII,
 			fep->hwp + FEC_IMASK);
 }
@@ -1920,9 +1844,7 @@ fec_stop(struct net_device *dev)
 {
 	struct fec_enet_private *fep = netdev_priv(dev);
 
-	/*
-	** We cannot expect a graceful transmit stop without link !!!
-	*/
+	/* We cannot expect a graceful transmit stop without link !!! */
 	if (fep->link) {
 		writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */
 		udelay(10);