macb: Move the Atmel driver

Move the Atmel driver into drivers/net/ethernet/cadence/ and
make the necessary Kconfig and Makefile changes.

CC: Nicolas Ferre <nicolas.ferre@atmel.com>
CC: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

1 files changed, 0 insertions, 1366 deletions

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
deleted file mode 100644
index dc4e305a1087..000000000000
--- a/drivers/net/macb.c
+++ /dev/null
@@ -1,1366 +0,0 @@
-/*
- * Atmel MACB Ethernet Controller driver
- *
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/clk.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/dma-mapping.h>
-#include <linux/platform_device.h>
-#include <linux/phy.h>
-
-#include <mach/board.h>
-#include <mach/cpu.h>
-
-#include "macb.h"
-
-#define RX_BUFFER_SIZE		128
-#define RX_RING_SIZE		512
-#define RX_RING_BYTES		(sizeof(struct dma_desc) * RX_RING_SIZE)
-
-/* Make the IP header word-aligned (the ethernet header is 14 bytes) */
-#define RX_OFFSET		2
-
-#define TX_RING_SIZE		128
-#define DEF_TX_RING_PENDING	(TX_RING_SIZE - 1)
-#define TX_RING_BYTES		(sizeof(struct dma_desc) * TX_RING_SIZE)
-
-#define TX_RING_GAP(bp)						\
-	(TX_RING_SIZE - (bp)->tx_pending)
-#define TX_BUFFS_AVAIL(bp)					\
-	(((bp)->tx_tail <= (bp)->tx_head) ?			\
-	 (bp)->tx_tail + (bp)->tx_pending - (bp)->tx_head :	\
-	 (bp)->tx_tail - (bp)->tx_head - TX_RING_GAP(bp))
-#define NEXT_TX(n)		(((n) + 1) & (TX_RING_SIZE - 1))
-
-#define NEXT_RX(n)		(((n) + 1) & (RX_RING_SIZE - 1))
-
-/* minimum number of free TX descriptors before waking up TX process */
-#define MACB_TX_WAKEUP_THRESH	(TX_RING_SIZE / 4)
-
-#define MACB_RX_INT_FLAGS	(MACB_BIT(RCOMP) | MACB_BIT(RXUBR)	\
-				 | MACB_BIT(ISR_ROVR))
-
-static void __macb_set_hwaddr(struct macb *bp)
-{
-	u32 bottom;
-	u16 top;
-
-	bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr));
-	macb_writel(bp, SA1B, bottom);
-	top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4)));
-	macb_writel(bp, SA1T, top);
-}
-
-static void __init macb_get_hwaddr(struct macb *bp)
-{
-	u32 bottom;
-	u16 top;
-	u8 addr[6];
-
-	bottom = macb_readl(bp, SA1B);
-	top = macb_readl(bp, SA1T);
-
-	addr[0] = bottom & 0xff;
-	addr[1] = (bottom >> 8) & 0xff;
-	addr[2] = (bottom >> 16) & 0xff;
-	addr[3] = (bottom >> 24) & 0xff;
-	addr[4] = top & 0xff;
-	addr[5] = (top >> 8) & 0xff;
-
-	if (is_valid_ether_addr(addr)) {
-		memcpy(bp->dev->dev_addr, addr, sizeof(addr));
-	} else {
-		dev_info(&bp->pdev->dev, "invalid hw address, using random\n");
-		random_ether_addr(bp->dev->dev_addr);
-	}
-}
-
-static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
-{
-	struct macb *bp = bus->priv;
-	int value;
-
-	macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
-			      | MACB_BF(RW, MACB_MAN_READ)
-			      | MACB_BF(PHYA, mii_id)
-			      | MACB_BF(REGA, regnum)
-			      | MACB_BF(CODE, MACB_MAN_CODE)));
-
-	/* wait for end of transfer */
-	while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
-		cpu_relax();
-
-	value = MACB_BFEXT(DATA, macb_readl(bp, MAN));
-
-	return value;
-}
-
-static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
-			   u16 value)
-{
-	struct macb *bp = bus->priv;
-
-	macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
-			      | MACB_BF(RW, MACB_MAN_WRITE)
-			      | MACB_BF(PHYA, mii_id)
-			      | MACB_BF(REGA, regnum)
-			      | MACB_BF(CODE, MACB_MAN_CODE)
-			      | MACB_BF(DATA, value)));
-
-	/* wait for end of transfer */
-	while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
-		cpu_relax();
-
-	return 0;
-}
-
-static int macb_mdio_reset(struct mii_bus *bus)
-{
-	return 0;
-}
-
-static void macb_handle_link_change(struct net_device *dev)
-{
-	struct macb *bp = netdev_priv(dev);
-	struct phy_device *phydev = bp->phy_dev;
-	unsigned long flags;
-
-	int status_change = 0;
-
-	spin_lock_irqsave(&bp->lock, flags);
-
-	if (phydev->link) {
-		if ((bp->speed != phydev->speed) ||
-		    (bp->duplex != phydev->duplex)) {
-			u32 reg;
-
-			reg = macb_readl(bp, NCFGR);
-			reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
-
-			if (phydev->duplex)
-				reg |= MACB_BIT(FD);
-			if (phydev->speed == SPEED_100)
-				reg |= MACB_BIT(SPD);
-
-			macb_writel(bp, NCFGR, reg);
-
-			bp->speed = phydev->speed;
-			bp->duplex = phydev->duplex;
-			status_change = 1;
-		}
-	}
-
-	if (phydev->link != bp->link) {
-		if (!phydev->link) {
-			bp->speed = 0;
-			bp->duplex = -1;
-		}
-		bp->link = phydev->link;
-
-		status_change = 1;
-	}
-
-	spin_unlock_irqrestore(&bp->lock, flags);
-
-	if (status_change) {
-		if (phydev->link)
-			printk(KERN_INFO "%s: link up (%d/%s)\n",
-			       dev->name, phydev->speed,
-			       DUPLEX_FULL == phydev->duplex ? "Full":"Half");
-		else
-			printk(KERN_INFO "%s: link down\n", dev->name);
-	}
-}
-
-/* based on au1000_eth. c*/
-static int macb_mii_probe(struct net_device *dev)
-{
-	struct macb *bp = netdev_priv(dev);
-	struct phy_device *phydev;
-	struct eth_platform_data *pdata;
-	int ret;
-
-	phydev = phy_find_first(bp->mii_bus);
-	if (!phydev) {
-		printk (KERN_ERR "%s: no PHY found\n", dev->name);
-		return -1;
-	}
-
-	pdata = bp->pdev->dev.platform_data;
-	/* TODO : add pin_irq */
-
-	/* attach the mac to the phy */
-	ret = phy_connect_direct(dev, phydev, &macb_handle_link_change, 0,
-				 pdata && pdata->is_rmii ?
-				 PHY_INTERFACE_MODE_RMII :
-				 PHY_INTERFACE_MODE_MII);
-	if (ret) {
-		printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
-		return ret;
-	}
-
-	/* mask with MAC supported features */
-	phydev->supported &= PHY_BASIC_FEATURES;
-
-	phydev->advertising = phydev->supported;
-
-	bp->link = 0;
-	bp->speed = 0;
-	bp->duplex = -1;
-	bp->phy_dev = phydev;
-
-	return 0;
-}
-
-static int macb_mii_init(struct macb *bp)
-{
-	struct eth_platform_data *pdata;
-	int err = -ENXIO, i;
-
-	/* Enable management port */
-	macb_writel(bp, NCR, MACB_BIT(MPE));
-
-	bp->mii_bus = mdiobus_alloc();
-	if (bp->mii_bus == NULL) {
-		err = -ENOMEM;
-		goto err_out;
-	}
-
-	bp->mii_bus->name = "MACB_mii_bus";
-	bp->mii_bus->read = &macb_mdio_read;
-	bp->mii_bus->write = &macb_mdio_write;
-	bp->mii_bus->reset = &macb_mdio_reset;
-	snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%x", bp->pdev->id);
-	bp->mii_bus->priv = bp;
-	bp->mii_bus->parent = &bp->dev->dev;
-	pdata = bp->pdev->dev.platform_data;
-
-	if (pdata)
-		bp->mii_bus->phy_mask = pdata->phy_mask;
-
-	bp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
-	if (!bp->mii_bus->irq) {
-		err = -ENOMEM;
-		goto err_out_free_mdiobus;
-	}
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		bp->mii_bus->irq[i] = PHY_POLL;
-
-	dev_set_drvdata(&bp->dev->dev, bp->mii_bus);
-
-	if (mdiobus_register(bp->mii_bus))
-		goto err_out_free_mdio_irq;
-
-	if (macb_mii_probe(bp->dev) != 0) {
-		goto err_out_unregister_bus;
-	}
-
-	return 0;
-
-err_out_unregister_bus:
-	mdiobus_unregister(bp->mii_bus);
-err_out_free_mdio_irq:
-	kfree(bp->mii_bus->irq);
-err_out_free_mdiobus:
-	mdiobus_free(bp->mii_bus);
-err_out:
-	return err;
-}
-
-static void macb_update_stats(struct macb *bp)
-{
-	u32 __iomem *reg = bp->regs + MACB_PFR;
-	u32 *p = &bp->hw_stats.rx_pause_frames;
-	u32 *end = &bp->hw_stats.tx_pause_frames + 1;
-
-	WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4);
-
-	for(; p < end; p++, reg++)
-		*p += __raw_readl(reg);
-}
-
-static void macb_tx(struct macb *bp)
-{
-	unsigned int tail;
-	unsigned int head;
-	u32 status;
-
-	status = macb_readl(bp, TSR);
-	macb_writel(bp, TSR, status);
-
-	dev_dbg(&bp->pdev->dev, "macb_tx status = %02lx\n",
-		(unsigned long)status);
-
-	if (status & (MACB_BIT(UND) | MACB_BIT(TSR_RLE))) {
-		int i;
-		printk(KERN_ERR "%s: TX %s, resetting buffers\n",
-			bp->dev->name, status & MACB_BIT(UND) ?
-			"underrun" : "retry limit exceeded");
-
-		/* Transfer ongoing, disable transmitter, to avoid confusion */
-		if (status & MACB_BIT(TGO))
-			macb_writel(bp, NCR, macb_readl(bp, NCR) & ~MACB_BIT(TE));
-
-		head = bp->tx_head;
-
-		/*Mark all the buffer as used to avoid sending a lost buffer*/
-		for (i = 0; i < TX_RING_SIZE; i++)
-			bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
-
-		/* Add wrap bit */
-		bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP);
-
-		/* free transmit buffer in upper layer*/
-		for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
-			struct ring_info *rp = &bp->tx_skb[tail];
-			struct sk_buff *skb = rp->skb;
-
-			BUG_ON(skb == NULL);
-
-			rmb();
-
-			dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
-							 DMA_TO_DEVICE);
-			rp->skb = NULL;
-			dev_kfree_skb_irq(skb);
-		}
-
-		bp->tx_head = bp->tx_tail = 0;
-
-		/* Enable the transmitter again */
-		if (status & MACB_BIT(TGO))
-			macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TE));
-	}
-
-	if (!(status & MACB_BIT(COMP)))
-		/*
-		 * This may happen when a buffer becomes complete
-		 * between reading the ISR and scanning the
-		 * descriptors.  Nothing to worry about.
-		 */
-		return;
-
-	head = bp->tx_head;
-	for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
-		struct ring_info *rp = &bp->tx_skb[tail];
-		struct sk_buff *skb = rp->skb;
-		u32 bufstat;
-
-		BUG_ON(skb == NULL);
-
-		rmb();
-		bufstat = bp->tx_ring[tail].ctrl;
-
-		if (!(bufstat & MACB_BIT(TX_USED)))
-			break;
-
-		dev_dbg(&bp->pdev->dev, "skb %u (data %p) TX complete\n",
-			tail, skb->data);
-		dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len,
-				 DMA_TO_DEVICE);
-		bp->stats.tx_packets++;
-		bp->stats.tx_bytes += skb->len;
-		rp->skb = NULL;
-		dev_kfree_skb_irq(skb);
-	}
-
-	bp->tx_tail = tail;
-	if (netif_queue_stopped(bp->dev) &&
-	    TX_BUFFS_AVAIL(bp) > MACB_TX_WAKEUP_THRESH)
-		netif_wake_queue(bp->dev);
-}
-
-static int macb_rx_frame(struct macb *bp, unsigned int first_frag,
-			 unsigned int last_frag)
-{
-	unsigned int len;
-	unsigned int frag;
-	unsigned int offset = 0;
-	struct sk_buff *skb;
-
-	len = MACB_BFEXT(RX_FRMLEN, bp->rx_ring[last_frag].ctrl);
-
-	dev_dbg(&bp->pdev->dev, "macb_rx_frame frags %u - %u (len %u)\n",
-		first_frag, last_frag, len);
-
-	skb = dev_alloc_skb(len + RX_OFFSET);
-	if (!skb) {
-		bp->stats.rx_dropped++;
-		for (frag = first_frag; ; frag = NEXT_RX(frag)) {
-			bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
-			if (frag == last_frag)
-				break;
-		}
-		wmb();
-		return 1;
-	}
-
-	skb_reserve(skb, RX_OFFSET);
-	skb_checksum_none_assert(skb);
-	skb_put(skb, len);
-
-	for (frag = first_frag; ; frag = NEXT_RX(frag)) {
-		unsigned int frag_len = RX_BUFFER_SIZE;
-
-		if (offset + frag_len > len) {
-			BUG_ON(frag != last_frag);
-			frag_len = len - offset;
-		}
-		skb_copy_to_linear_data_offset(skb, offset,
-					       (bp->rx_buffers +
-					        (RX_BUFFER_SIZE * frag)),
-					       frag_len);
-		offset += RX_BUFFER_SIZE;
-		bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
-		wmb();
-
-		if (frag == last_frag)
-			break;
-	}
-
-	skb->protocol = eth_type_trans(skb, bp->dev);
-
-	bp->stats.rx_packets++;
-	bp->stats.rx_bytes += len;
-	dev_dbg(&bp->pdev->dev, "received skb of length %u, csum: %08x\n",
-		skb->len, skb->csum);
-	netif_receive_skb(skb);
-
-	return 0;
-}
-
-/* Mark DMA descriptors from begin up to and not including end as unused */
-static void discard_partial_frame(struct macb *bp, unsigned int begin,
-				  unsigned int end)
-{
-	unsigned int frag;
-
-	for (frag = begin; frag != end; frag = NEXT_RX(frag))
-		bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED);
-	wmb();
-
-	/*
-	 * When this happens, the hardware stats registers for
-	 * whatever caused this is updated, so we don't have to record
-	 * anything.
-	 */
-}
-
-static int macb_rx(struct macb *bp, int budget)
-{
-	int received = 0;
-	unsigned int tail = bp->rx_tail;
-	int first_frag = -1;
-
-	for (; budget > 0; tail = NEXT_RX(tail)) {
-		u32 addr, ctrl;
-
-		rmb();
-		addr = bp->rx_ring[tail].addr;
-		ctrl = bp->rx_ring[tail].ctrl;
-
-		if (!(addr & MACB_BIT(RX_USED)))
-			break;
-
-		if (ctrl & MACB_BIT(RX_SOF)) {
-			if (first_frag != -1)
-				discard_partial_frame(bp, first_frag, tail);
-			first_frag = tail;
-		}
-
-		if (ctrl & MACB_BIT(RX_EOF)) {
-			int dropped;
-			BUG_ON(first_frag == -1);
-
-			dropped = macb_rx_frame(bp, first_frag, tail);
-			first_frag = -1;
-			if (!dropped) {
-				received++;
-				budget--;
-			}
-		}
-	}
-
-	if (first_frag != -1)
-		bp->rx_tail = first_frag;
-	else
-		bp->rx_tail = tail;
-
-	return received;
-}
-
-static int macb_poll(struct napi_struct *napi, int budget)
-{
-	struct macb *bp = container_of(napi, struct macb, napi);
-	int work_done;
-	u32 status;
-
-	status = macb_readl(bp, RSR);
-	macb_writel(bp, RSR, status);
-
-	work_done = 0;
-
-	dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n",
-		(unsigned long)status, budget);
-
-	work_done = macb_rx(bp, budget);
-	if (work_done < budget) {
-		napi_complete(napi);
-
-		/*
-		 * We've done what we can to clean the buffers. Make sure we
-		 * get notified when new packets arrive.
-		 */
-		macb_writel(bp, IER, MACB_RX_INT_FLAGS);
-	}
-
-	/* TODO: Handle errors */
-
-	return work_done;
-}
-
-static irqreturn_t macb_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = dev_id;
-	struct macb *bp = netdev_priv(dev);
-	u32 status;
-
-	status = macb_readl(bp, ISR);
-
-	if (unlikely(!status))
-		return IRQ_NONE;
-
-	spin_lock(&bp->lock);
-
-	while (status) {
-		/* close possible race with dev_close */
-		if (unlikely(!netif_running(dev))) {
-			macb_writel(bp, IDR, ~0UL);
-			break;
-		}
-
-		if (status & MACB_RX_INT_FLAGS) {
-			/*
-			 * There's no point taking any more interrupts
-			 * until we have processed the buffers. The
-			 * scheduling call may fail if the poll routine
-			 * is already scheduled, so disable interrupts
-			 * now.
-			 */
-			macb_writel(bp, IDR, MACB_RX_INT_FLAGS);
-
-			if (napi_schedule_prep(&bp->napi)) {
-				dev_dbg(&bp->pdev->dev,
-					"scheduling RX softirq\n");
-				__napi_schedule(&bp->napi);
-			}
-		}
-
-		if (status & (MACB_BIT(TCOMP) | MACB_BIT(ISR_TUND) |
-			    MACB_BIT(ISR_RLE)))
-			macb_tx(bp);
-
-		/*
-		 * Link change detection isn't possible with RMII, so we'll
-		 * add that if/when we get our hands on a full-blown MII PHY.
-		 */
-
-		if (status & MACB_BIT(ISR_ROVR)) {
-			/* We missed at least one packet */
-			bp->hw_stats.rx_overruns++;
-		}
-
-		if (status & MACB_BIT(HRESP)) {
-			/*
-			 * TODO: Reset the hardware, and maybe move the printk
-			 * to a lower-priority context as well (work queue?)
-			 */
-			printk(KERN_ERR "%s: DMA bus error: HRESP not OK\n",
-			       dev->name);
-		}
-
-		status = macb_readl(bp, ISR);
-	}
-
-	spin_unlock(&bp->lock);
-
-	return IRQ_HANDLED;
-}
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-/*
- * Polling receive - used by netconsole and other diagnostic tools
- * to allow network i/o with interrupts disabled.
- */
-static void macb_poll_controller(struct net_device *dev)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-	macb_interrupt(dev->irq, dev);
-	local_irq_restore(flags);
-}
-#endif
-
-static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct macb *bp = netdev_priv(dev);
-	dma_addr_t mapping;
-	unsigned int len, entry;
-	u32 ctrl;
-	unsigned long flags;
-
-#ifdef DEBUG
-	int i;
-	dev_dbg(&bp->pdev->dev,
-		"start_xmit: len %u head %p data %p tail %p end %p\n",
-		skb->len, skb->head, skb->data,
-		skb_tail_pointer(skb), skb_end_pointer(skb));
-	dev_dbg(&bp->pdev->dev,
-		"data:");
-	for (i = 0; i < 16; i++)
-		printk(" %02x", (unsigned int)skb->data[i]);
-	printk("\n");
-#endif
-
-	len = skb->len;
-	spin_lock_irqsave(&bp->lock, flags);
-
-	/* This is a hard error, log it. */
-	if (TX_BUFFS_AVAIL(bp) < 1) {
-		netif_stop_queue(dev);
-		spin_unlock_irqrestore(&bp->lock, flags);
-		dev_err(&bp->pdev->dev,
-			"BUG! Tx Ring full when queue awake!\n");
-		dev_dbg(&bp->pdev->dev, "tx_head = %u, tx_tail = %u\n",
-			bp->tx_head, bp->tx_tail);
-		return NETDEV_TX_BUSY;
-	}
-
-	entry = bp->tx_head;
-	dev_dbg(&bp->pdev->dev, "Allocated ring entry %u\n", entry);
-	mapping = dma_map_single(&bp->pdev->dev, skb->data,
-				 len, DMA_TO_DEVICE);
-	bp->tx_skb[entry].skb = skb;
-	bp->tx_skb[entry].mapping = mapping;
-	dev_dbg(&bp->pdev->dev, "Mapped skb data %p to DMA addr %08lx\n",
-		skb->data, (unsigned long)mapping);
-
-	ctrl = MACB_BF(TX_FRMLEN, len);
-	ctrl |= MACB_BIT(TX_LAST);
-	if (entry == (TX_RING_SIZE - 1))
-		ctrl |= MACB_BIT(TX_WRAP);
-
-	bp->tx_ring[entry].addr = mapping;
-	bp->tx_ring[entry].ctrl = ctrl;
-	wmb();
-
-	entry = NEXT_TX(entry);
-	bp->tx_head = entry;
-
-	skb_tx_timestamp(skb);
-
-	macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
-
-	if (TX_BUFFS_AVAIL(bp) < 1)
-		netif_stop_queue(dev);
-
-	spin_unlock_irqrestore(&bp->lock, flags);
-
-	return NETDEV_TX_OK;
-}
-
-static void macb_free_consistent(struct macb *bp)
-{
-	if (bp->tx_skb) {
-		kfree(bp->tx_skb);
-		bp->tx_skb = NULL;
-	}
-	if (bp->rx_ring) {
-		dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES,
-				  bp->rx_ring, bp->rx_ring_dma);
-		bp->rx_ring = NULL;
-	}
-	if (bp->tx_ring) {
-		dma_free_coherent(&bp->pdev->dev, TX_RING_BYTES,
-				  bp->tx_ring, bp->tx_ring_dma);
-		bp->tx_ring = NULL;
-	}
-	if (bp->rx_buffers) {
-		dma_free_coherent(&bp->pdev->dev,
-				  RX_RING_SIZE * RX_BUFFER_SIZE,
-				  bp->rx_buffers, bp->rx_buffers_dma);
-		bp->rx_buffers = NULL;
-	}
-}
-
-static int macb_alloc_consistent(struct macb *bp)
-{
-	int size;
-
-	size = TX_RING_SIZE * sizeof(struct ring_info);
-	bp->tx_skb = kmalloc(size, GFP_KERNEL);
-	if (!bp->tx_skb)
-		goto out_err;
-
-	size = RX_RING_BYTES;
-	bp->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
-					 &bp->rx_ring_dma, GFP_KERNEL);
-	if (!bp->rx_ring)
-		goto out_err;
-	dev_dbg(&bp->pdev->dev,
-		"Allocated RX ring of %d bytes at %08lx (mapped %p)\n",
-		size, (unsigned long)bp->rx_ring_dma, bp->rx_ring);
-
-	size = TX_RING_BYTES;
-	bp->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
-					 &bp->tx_ring_dma, GFP_KERNEL);
-	if (!bp->tx_ring)
-		goto out_err;
-	dev_dbg(&bp->pdev->dev,
-		"Allocated TX ring of %d bytes at %08lx (mapped %p)\n",
-		size, (unsigned long)bp->tx_ring_dma, bp->tx_ring);
-
-	size = RX_RING_SIZE * RX_BUFFER_SIZE;
-	bp->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size,
-					    &bp->rx_buffers_dma, GFP_KERNEL);
-	if (!bp->rx_buffers)
-		goto out_err;
-	dev_dbg(&bp->pdev->dev,
-		"Allocated RX buffers of %d bytes at %08lx (mapped %p)\n",
-		size, (unsigned long)bp->rx_buffers_dma, bp->rx_buffers);
-
-	return 0;
-
-out_err:
-	macb_free_consistent(bp);
-	return -ENOMEM;
-}
-
-static void macb_init_rings(struct macb *bp)
-{
-	int i;
-	dma_addr_t addr;
-
-	addr = bp->rx_buffers_dma;
-	for (i = 0; i < RX_RING_SIZE; i++) {
-		bp->rx_ring[i].addr = addr;
-		bp->rx_ring[i].ctrl = 0;
-		addr += RX_BUFFER_SIZE;
-	}
-	bp->rx_ring[RX_RING_SIZE - 1].addr |= MACB_BIT(RX_WRAP);
-
-	for (i = 0; i < TX_RING_SIZE; i++) {
-		bp->tx_ring[i].addr = 0;
-		bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);
-	}
-	bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP);
-
-	bp->rx_tail = bp->tx_head = bp->tx_tail = 0;
-}
-
-static void macb_reset_hw(struct macb *bp)
-{
-	/* Make sure we have the write buffer for ourselves */
-	wmb();
-
-	/*
-	 * Disable RX and TX (XXX: Should we halt the transmission
-	 * more gracefully?)
-	 */
-	macb_writel(bp, NCR, 0);
-
-	/* Clear the stats registers (XXX: Update stats first?) */
-	macb_writel(bp, NCR, MACB_BIT(CLRSTAT));
-
-	/* Clear all status flags */
-	macb_writel(bp, TSR, ~0UL);
-	macb_writel(bp, RSR, ~0UL);
-
-	/* Disable all interrupts */
-	macb_writel(bp, IDR, ~0UL);
-	macb_readl(bp, ISR);
-}
-
-static void macb_init_hw(struct macb *bp)
-{
-	u32 config;
-
-	macb_reset_hw(bp);
-	__macb_set_hwaddr(bp);
-
-	config = macb_readl(bp, NCFGR) & MACB_BF(CLK, -1L);
-	config |= MACB_BIT(PAE);		/* PAuse Enable */
-	config |= MACB_BIT(DRFCS);		/* Discard Rx FCS */
-	config |= MACB_BIT(BIG);		/* Receive oversized frames */
-	if (bp->dev->flags & IFF_PROMISC)
-		config |= MACB_BIT(CAF);	/* Copy All Frames */
-	if (!(bp->dev->flags & IFF_BROADCAST))
-		config |= MACB_BIT(NBC);	/* No BroadCast */
-	macb_writel(bp, NCFGR, config);
-
-	/* Initialize TX and RX buffers */
-	macb_writel(bp, RBQP, bp->rx_ring_dma);
-	macb_writel(bp, TBQP, bp->tx_ring_dma);
-
-	/* Enable TX and RX */
-	macb_writel(bp, NCR, MACB_BIT(RE) | MACB_BIT(TE) | MACB_BIT(MPE));
-
-	/* Enable interrupts */
-	macb_writel(bp, IER, (MACB_BIT(RCOMP)
-			      | MACB_BIT(RXUBR)
-			      | MACB_BIT(ISR_TUND)
-			      | MACB_BIT(ISR_RLE)
-			      | MACB_BIT(TXERR)
-			      | MACB_BIT(TCOMP)
-			      | MACB_BIT(ISR_ROVR)
-			      | MACB_BIT(HRESP)));
-
-}
-
-/*
- * The hash address register is 64 bits long and takes up two
- * locations in the memory map.  The least significant bits are stored
- * in EMAC_HSL and the most significant bits in EMAC_HSH.
- *
- * The unicast hash enable and the multicast hash enable bits in the
- * network configuration register enable the reception of hash matched
- * frames. The destination address is reduced to a 6 bit index into
- * the 64 bit hash register using the following hash function.  The
- * hash function is an exclusive or of every sixth bit of the
- * destination address.
- *
- * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
- * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
- * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
- * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
- * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
- * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
- *
- * da[0] represents the least significant bit of the first byte
- * received, that is, the multicast/unicast indicator, and da[47]
- * represents the most significant bit of the last byte received.  If
- * the hash index, hi[n], points to a bit that is set in the hash
- * register then the frame will be matched according to whether the
- * frame is multicast or unicast.  A multicast match will be signalled
- * if the multicast hash enable bit is set, da[0] is 1 and the hash
- * index points to a bit set in the hash register.  A unicast match
- * will be signalled if the unicast hash enable bit is set, da[0] is 0
- * and the hash index points to a bit set in the hash register.  To
- * receive all multicast frames, the hash register should be set with
- * all ones and the multicast hash enable bit should be set in the
- * network configuration register.
- */
-
-static inline int hash_bit_value(int bitnr, __u8 *addr)
-{
-	if (addr[bitnr / 8] & (1 << (bitnr % 8)))
-		return 1;
-	return 0;
-}
-
-/*
- * Return the hash index value for the specified address.
- */
-static int hash_get_index(__u8 *addr)
-{
-	int i, j, bitval;
-	int hash_index = 0;
-
-	for (j = 0; j < 6; j++) {
-		for (i = 0, bitval = 0; i < 8; i++)
-			bitval ^= hash_bit_value(i*6 + j, addr);
-
-		hash_index |= (bitval << j);
-	}
-
-	return hash_index;
-}
-
-/*
- * Add multicast addresses to the internal multicast-hash table.
- */
-static void macb_sethashtable(struct net_device *dev)
-{
-	struct netdev_hw_addr *ha;
-	unsigned long mc_filter[2];
-	unsigned int bitnr;
-	struct macb *bp = netdev_priv(dev);
-
-	mc_filter[0] = mc_filter[1] = 0;
-
-	netdev_for_each_mc_addr(ha, dev) {
-		bitnr = hash_get_index(ha->addr);
-		mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
-	}
-
-	macb_writel(bp, HRB, mc_filter[0]);
-	macb_writel(bp, HRT, mc_filter[1]);
-}
-
-/*
- * Enable/Disable promiscuous and multicast modes.
- */
-static void macb_set_rx_mode(struct net_device *dev)
-{
-	unsigned long cfg;
-	struct macb *bp = netdev_priv(dev);
-
-	cfg = macb_readl(bp, NCFGR);
-
-	if (dev->flags & IFF_PROMISC)
-		/* Enable promiscuous mode */
-		cfg |= MACB_BIT(CAF);
-	else if (dev->flags & (~IFF_PROMISC))
-		 /* Disable promiscuous mode */
-		cfg &= ~MACB_BIT(CAF);
-
-	if (dev->flags & IFF_ALLMULTI) {
-		/* Enable all multicast mode */
-		macb_writel(bp, HRB, -1);
-		macb_writel(bp, HRT, -1);
-		cfg |= MACB_BIT(NCFGR_MTI);
-	} else if (!netdev_mc_empty(dev)) {
-		/* Enable specific multicasts */
-		macb_sethashtable(dev);
-		cfg |= MACB_BIT(NCFGR_MTI);
-	} else if (dev->flags & (~IFF_ALLMULTI)) {
-		/* Disable all multicast mode */
-		macb_writel(bp, HRB, 0);
-		macb_writel(bp, HRT, 0);
-		cfg &= ~MACB_BIT(NCFGR_MTI);
-	}
-
-	macb_writel(bp, NCFGR, cfg);
-}
-
-static int macb_open(struct net_device *dev)
-{
-	struct macb *bp = netdev_priv(dev);
-	int err;
-
-	dev_dbg(&bp->pdev->dev, "open\n");
-
-	/* if the phy is not yet register, retry later*/
-	if (!bp->phy_dev)
-		return -EAGAIN;
-
-	if (!is_valid_ether_addr(dev->dev_addr))
-		return -EADDRNOTAVAIL;
-
-	err = macb_alloc_consistent(bp);
-	if (err) {
-		printk(KERN_ERR
-		       "%s: Unable to allocate DMA memory (error %d)\n",
-		       dev->name, err);
-		return err;
-	}
-
-	napi_enable(&bp->napi);
-
-	macb_init_rings(bp);
-	macb_init_hw(bp);
-
-	/* schedule a link state check */
-	phy_start(bp->phy_dev);
-
-	netif_start_queue(dev);
-
-	return 0;
-}
-
-static int macb_close(struct net_device *dev)
-{
-	struct macb *bp = netdev_priv(dev);
-	unsigned long flags;
-
-	netif_stop_queue(dev);
-	napi_disable(&bp->napi);
-
-	if (bp->phy_dev)
-		phy_stop(bp->phy_dev);
-
-	spin_lock_irqsave(&bp->lock, flags);
-	macb_reset_hw(bp);
-	netif_carrier_off(dev);
-	spin_unlock_irqrestore(&bp->lock, flags);
-
-	macb_free_consistent(bp);
-
-	return 0;
-}
-
-static struct net_device_stats *macb_get_stats(struct net_device *dev)
-{
-	struct macb *bp = netdev_priv(dev);
-	struct net_device_stats *nstat = &bp->stats;
-	struct macb_stats *hwstat = &bp->hw_stats;
-
-	/* read stats from hardware */
-	macb_update_stats(bp);
-
-	/* Convert HW stats into netdevice stats */
-	nstat->rx_errors = (hwstat->rx_fcs_errors +
-			    hwstat->rx_align_errors +
-			    hwstat->rx_resource_errors +
-			    hwstat->rx_overruns +
-			    hwstat->rx_oversize_pkts +
-			    hwstat->rx_jabbers +
-			    hwstat->rx_undersize_pkts +
-			    hwstat->sqe_test_errors +
-			    hwstat->rx_length_mismatch);
-	nstat->tx_errors = (hwstat->tx_late_cols +
-			    hwstat->tx_excessive_cols +
-			    hwstat->tx_underruns +
-			    hwstat->tx_carrier_errors);
-	nstat->collisions = (hwstat->tx_single_cols +
-			     hwstat->tx_multiple_cols +
-			     hwstat->tx_excessive_cols);
-	nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
-				   hwstat->rx_jabbers +
-				   hwstat->rx_undersize_pkts +
-				   hwstat->rx_length_mismatch);
-	nstat->rx_over_errors = hwstat->rx_resource_errors +
-				   hwstat->rx_overruns;
-	nstat->rx_crc_errors = hwstat->rx_fcs_errors;
-	nstat->rx_frame_errors = hwstat->rx_align_errors;
-	nstat->rx_fifo_errors = hwstat->rx_overruns;
-	/* XXX: What does "missed" mean? */
-	nstat->tx_aborted_errors = hwstat->tx_excessive_cols;
-	nstat->tx_carrier_errors = hwstat->tx_carrier_errors;
-	nstat->tx_fifo_errors = hwstat->tx_underruns;
-	/* Don't know about heartbeat or window errors... */
-
-	return nstat;
-}
-
-static int macb_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	struct macb *bp = netdev_priv(dev);
-	struct phy_device *phydev = bp->phy_dev;
-
-	if (!phydev)
-		return -ENODEV;
-
-	return phy_ethtool_gset(phydev, cmd);
-}
-
-static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	struct macb *bp = netdev_priv(dev);
-	struct phy_device *phydev = bp->phy_dev;
-
-	if (!phydev)
-		return -ENODEV;
-
-	return phy_ethtool_sset(phydev, cmd);
-}
-
-static void macb_get_drvinfo(struct net_device *dev,
-			     struct ethtool_drvinfo *info)
-{
-	struct macb *bp = netdev_priv(dev);
-
-	strcpy(info->driver, bp->pdev->dev.driver->name);
-	strcpy(info->version, "$Revision: 1.14 $");
-	strcpy(info->bus_info, dev_name(&bp->pdev->dev));
-}
-
-static const struct ethtool_ops macb_ethtool_ops = {
-	.get_settings		= macb_get_settings,
-	.set_settings		= macb_set_settings,
-	.get_drvinfo		= macb_get_drvinfo,
-	.get_link		= ethtool_op_get_link,
-};
-
-static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
-	struct macb *bp = netdev_priv(dev);
-	struct phy_device *phydev = bp->phy_dev;
-
-	if (!netif_running(dev))
-		return -EINVAL;
-
-	if (!phydev)
-		return -ENODEV;
-
-	return phy_mii_ioctl(phydev, rq, cmd);
-}
-
-static const struct net_device_ops macb_netdev_ops = {
-	.ndo_open		= macb_open,
-	.ndo_stop		= macb_close,
-	.ndo_start_xmit		= macb_start_xmit,
-	.ndo_set_multicast_list	= macb_set_rx_mode,
-	.ndo_get_stats		= macb_get_stats,
-	.ndo_do_ioctl		= macb_ioctl,
-	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_change_mtu		= eth_change_mtu,
-	.ndo_set_mac_address	= eth_mac_addr,
-#ifdef CONFIG_NET_POLL_CONTROLLER
-	.ndo_poll_controller	= macb_poll_controller,
-#endif
-};
-
-static int __init macb_probe(struct platform_device *pdev)
-{
-	struct eth_platform_data *pdata;
-	struct resource *regs;
-	struct net_device *dev;
-	struct macb *bp;
-	struct phy_device *phydev;
-	unsigned long pclk_hz;
-	u32 config;
-	int err = -ENXIO;
-
-	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!regs) {
-		dev_err(&pdev->dev, "no mmio resource defined\n");
-		goto err_out;
-	}
-
-	err = -ENOMEM;
-	dev = alloc_etherdev(sizeof(*bp));
-	if (!dev) {
-		dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n");
-		goto err_out;
-	}
-
-	SET_NETDEV_DEV(dev, &pdev->dev);
-
-	/* TODO: Actually, we have some interesting features... */
-	dev->features |= 0;
-
-	bp = netdev_priv(dev);
-	bp->pdev = pdev;
-	bp->dev = dev;
-
-	spin_lock_init(&bp->lock);
-
-#if defined(CONFIG_ARCH_AT91)
-	bp->pclk = clk_get(&pdev->dev, "macb_clk");
-	if (IS_ERR(bp->pclk)) {
-		dev_err(&pdev->dev, "failed to get macb_clk\n");
-		goto err_out_free_dev;
-	}
-	clk_enable(bp->pclk);
-#else
-	bp->pclk = clk_get(&pdev->dev, "pclk");
-	if (IS_ERR(bp->pclk)) {
-		dev_err(&pdev->dev, "failed to get pclk\n");
-		goto err_out_free_dev;
-	}
-	bp->hclk = clk_get(&pdev->dev, "hclk");
-	if (IS_ERR(bp->hclk)) {
-		dev_err(&pdev->dev, "failed to get hclk\n");
-		goto err_out_put_pclk;
-	}
-
-	clk_enable(bp->pclk);
-	clk_enable(bp->hclk);
-#endif
-
-	bp->regs = ioremap(regs->start, resource_size(regs));
-	if (!bp->regs) {
-		dev_err(&pdev->dev, "failed to map registers, aborting.\n");
-		err = -ENOMEM;
-		goto err_out_disable_clocks;
-	}
-
-	dev->irq = platform_get_irq(pdev, 0);
-	err = request_irq(dev->irq, macb_interrupt, 0, dev->name, dev);
-	if (err) {
-		printk(KERN_ERR
-		       "%s: Unable to request IRQ %d (error %d)\n",
-		       dev->name, dev->irq, err);
-		goto err_out_iounmap;
-	}
-
-	dev->netdev_ops = &macb_netdev_ops;
-	netif_napi_add(dev, &bp->napi, macb_poll, 64);
-	dev->ethtool_ops = &macb_ethtool_ops;
-
-	dev->base_addr = regs->start;
-
-	/* Set MII management clock divider */
-	pclk_hz = clk_get_rate(bp->pclk);
-	if (pclk_hz <= 20000000)
-		config = MACB_BF(CLK, MACB_CLK_DIV8);
-	else if (pclk_hz <= 40000000)
-		config = MACB_BF(CLK, MACB_CLK_DIV16);
-	else if (pclk_hz <= 80000000)
-		config = MACB_BF(CLK, MACB_CLK_DIV32);
-	else
-		config = MACB_BF(CLK, MACB_CLK_DIV64);
-	macb_writel(bp, NCFGR, config);
-
-	macb_get_hwaddr(bp);
-	pdata = pdev->dev.platform_data;
-
-	if (pdata && pdata->is_rmii)
-#if defined(CONFIG_ARCH_AT91)
-		macb_writel(bp, USRIO, (MACB_BIT(RMII) | MACB_BIT(CLKEN)) );
-#else
-		macb_writel(bp, USRIO, 0);
-#endif
-	else
-#if defined(CONFIG_ARCH_AT91)
-		macb_writel(bp, USRIO, MACB_BIT(CLKEN));
-#else
-		macb_writel(bp, USRIO, MACB_BIT(MII));
-#endif
-
-	bp->tx_pending = DEF_TX_RING_PENDING;
-
-	err = register_netdev(dev);
-	if (err) {
-		dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
-		goto err_out_free_irq;
-	}
-
-	if (macb_mii_init(bp) != 0) {
-		goto err_out_unregister_netdev;
-	}
-
-	platform_set_drvdata(pdev, dev);
-
-	printk(KERN_INFO "%s: Atmel MACB at 0x%08lx irq %d (%pM)\n",
-	       dev->name, dev->base_addr, dev->irq, dev->dev_addr);
-
-	phydev = bp->phy_dev;
-	printk(KERN_INFO "%s: attached PHY driver [%s] "
-		"(mii_bus:phy_addr=%s, irq=%d)\n", dev->name,
-		phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
-
-	return 0;
-
-err_out_unregister_netdev:
-	unregister_netdev(dev);
-err_out_free_irq:
-	free_irq(dev->irq, dev);
-err_out_iounmap:
-	iounmap(bp->regs);
-err_out_disable_clocks:
-#ifndef CONFIG_ARCH_AT91
-	clk_disable(bp->hclk);
-	clk_put(bp->hclk);
-#endif
-	clk_disable(bp->pclk);
-#ifndef CONFIG_ARCH_AT91
-err_out_put_pclk:
-#endif
-	clk_put(bp->pclk);
-err_out_free_dev:
-	free_netdev(dev);
-err_out:
-	platform_set_drvdata(pdev, NULL);
-	return err;
-}
-
-static int __exit macb_remove(struct platform_device *pdev)
-{
-	struct net_device *dev;
-	struct macb *bp;
-
-	dev = platform_get_drvdata(pdev);
-
-	if (dev) {
-		bp = netdev_priv(dev);
-		if (bp->phy_dev)
-			phy_disconnect(bp->phy_dev);
-		mdiobus_unregister(bp->mii_bus);
-		kfree(bp->mii_bus->irq);
-		mdiobus_free(bp->mii_bus);
-		unregister_netdev(dev);
-		free_irq(dev->irq, dev);
-		iounmap(bp->regs);
-#ifndef CONFIG_ARCH_AT91
-		clk_disable(bp->hclk);
-		clk_put(bp->hclk);
-#endif
-		clk_disable(bp->pclk);
-		clk_put(bp->pclk);
-		free_netdev(dev);
-		platform_set_drvdata(pdev, NULL);
-	}
-
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int macb_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	struct net_device *netdev = platform_get_drvdata(pdev);
-	struct macb *bp = netdev_priv(netdev);
-
-	netif_device_detach(netdev);
-
-#ifndef CONFIG_ARCH_AT91
-	clk_disable(bp->hclk);
-#endif
-	clk_disable(bp->pclk);
-
-	return 0;
-}
-
-static int macb_resume(struct platform_device *pdev)
-{
-	struct net_device *netdev = platform_get_drvdata(pdev);
-	struct macb *bp = netdev_priv(netdev);
-
-	clk_enable(bp->pclk);
-#ifndef CONFIG_ARCH_AT91
-	clk_enable(bp->hclk);
-#endif
-
-	netif_device_attach(netdev);
-
-	return 0;
-}
-#else
-#define macb_suspend	NULL
-#define macb_resume	NULL
-#endif
-
-static struct platform_driver macb_driver = {
-	.remove		= __exit_p(macb_remove),
-	.suspend	= macb_suspend,
-	.resume		= macb_resume,
-	.driver		= {
-		.name		= "macb",
-		.owner	= THIS_MODULE,
-	},
-};
-
-static int __init macb_init(void)
-{
-	return platform_driver_probe(&macb_driver, macb_probe);
-}
-
-static void __exit macb_exit(void)
-{
-	platform_driver_unregister(&macb_driver);
-}
-
-module_init(macb_init);
-module_exit(macb_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Atmel MACB Ethernet driver");
-MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
-MODULE_ALIAS("platform:macb");