Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1978 insertions, 0 deletions

diff --git a/drivers/net/b44.c b/drivers/net/b44.c
new file mode 100644
index 000000000000..3fe8ba992c38
--- /dev/null
+++ b/drivers/net/b44.c
@@ -0,0 +1,1978 @@
+/* b44.c: Broadcom 4400 device driver.
+ *
+ * Copyright (C) 2002 David S. Miller (davem@redhat.com)
+ * Fixed by Pekka Pietikainen (pp@ee.oulu.fi)
+ *
+ * Distribute under GPL.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/netdevice.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/if_ether.h>
+#include <linux/etherdevice.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/version.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include "b44.h"
+
+#define DRV_MODULE_NAME		"b44"
+#define PFX DRV_MODULE_NAME	": "
+#define DRV_MODULE_VERSION	"0.95"
+#define DRV_MODULE_RELDATE	"Aug 3, 2004"
+
+#define B44_DEF_MSG_ENABLE	  \
+	(NETIF_MSG_DRV		| \
+	 NETIF_MSG_PROBE	| \
+	 NETIF_MSG_LINK		| \
+	 NETIF_MSG_TIMER	| \
+	 NETIF_MSG_IFDOWN	| \
+	 NETIF_MSG_IFUP		| \
+	 NETIF_MSG_RX_ERR	| \
+	 NETIF_MSG_TX_ERR)
+
+/* length of time before we decide the hardware is borked,
+ * and dev->tx_timeout() should be called to fix the problem
+ */
+#define B44_TX_TIMEOUT			(5 * HZ)
+
+/* hardware minimum and maximum for a single frame's data payload */
+#define B44_MIN_MTU			60
+#define B44_MAX_MTU			1500
+
+#define B44_RX_RING_SIZE		512
+#define B44_DEF_RX_RING_PENDING		200
+#define B44_RX_RING_BYTES	(sizeof(struct dma_desc) * \
+				 B44_RX_RING_SIZE)
+#define B44_TX_RING_SIZE		512
+#define B44_DEF_TX_RING_PENDING		(B44_TX_RING_SIZE - 1)
+#define B44_TX_RING_BYTES	(sizeof(struct dma_desc) * \
+				 B44_TX_RING_SIZE)
+#define B44_DMA_MASK 0x3fffffff
+
+#define TX_RING_GAP(BP)	\
+	(B44_TX_RING_SIZE - (BP)->tx_pending)
+#define TX_BUFFS_AVAIL(BP)						\
+	(((BP)->tx_cons <= (BP)->tx_prod) ?				\
+	  (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod :		\
+	  (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
+#define NEXT_TX(N)		(((N) + 1) & (B44_TX_RING_SIZE - 1))
+
+#define RX_PKT_BUF_SZ		(1536 + bp->rx_offset + 64)
+#define TX_PKT_BUF_SZ		(B44_MAX_MTU + ETH_HLEN + 8)
+
+/* minimum number of free TX descriptors required to wake up TX process */
+#define B44_TX_WAKEUP_THRESH		(B44_TX_RING_SIZE / 4)
+
+static char version[] __devinitdata =
+	DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
+
+MODULE_AUTHOR("Florian Schirmer, Pekka Pietikainen, David S. Miller");
+MODULE_DESCRIPTION("Broadcom 4400 10/100 PCI ethernet driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_MODULE_VERSION);
+
+static int b44_debug = -1;	/* -1 == use B44_DEF_MSG_ENABLE as value */
+module_param(b44_debug, int, 0);
+MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value");
+
+static struct pci_device_id b44_pci_tbl[] = {
+	{ PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
+	{ PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
+	{ PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
+	{ }	/* terminate list with empty entry */
+};
+
+MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
+
+static void b44_halt(struct b44 *);
+static void b44_init_rings(struct b44 *);
+static void b44_init_hw(struct b44 *);
+static int b44_poll(struct net_device *dev, int *budget);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void b44_poll_controller(struct net_device *dev);
+#endif
+
+static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
+{
+	return readl(bp->regs + reg);
+}
+
+static inline void bw32(const struct b44 *bp, 
+			unsigned long reg, unsigned long val)
+{
+	writel(val, bp->regs + reg);
+}
+
+static int b44_wait_bit(struct b44 *bp, unsigned long reg,
+			u32 bit, unsigned long timeout, const int clear)
+{
+	unsigned long i;
+
+	for (i = 0; i < timeout; i++) {
+		u32 val = br32(bp, reg);
+
+		if (clear && !(val & bit))
+			break;
+		if (!clear && (val & bit))
+			break;
+		udelay(10);
+	}
+	if (i == timeout) {
+		printk(KERN_ERR PFX "%s: BUG!  Timeout waiting for bit %08x of register "
+		       "%lx to %s.\n",
+		       bp->dev->name,
+		       bit, reg,
+		       (clear ? "clear" : "set"));
+		return -ENODEV;
+	}
+	return 0;
+}
+
+/* Sonics SiliconBackplane support routines.  ROFL, you should see all the
+ * buzz words used on this company's website :-)
+ *
+ * All of these routines must be invoked with bp->lock held and
+ * interrupts disabled.
+ */
+
+#define SB_PCI_DMA             0x40000000      /* Client Mode PCI memory access space (1 GB) */
+#define BCM4400_PCI_CORE_ADDR  0x18002000      /* Address of PCI core on BCM4400 cards */
+
+static u32 ssb_get_core_rev(struct b44 *bp)
+{
+	return (br32(bp, B44_SBIDHIGH) & SBIDHIGH_RC_MASK);
+}
+
+static u32 ssb_pci_setup(struct b44 *bp, u32 cores)
+{
+	u32 bar_orig, pci_rev, val;
+
+	pci_read_config_dword(bp->pdev, SSB_BAR0_WIN, &bar_orig);
+	pci_write_config_dword(bp->pdev, SSB_BAR0_WIN, BCM4400_PCI_CORE_ADDR);
+	pci_rev = ssb_get_core_rev(bp);
+
+	val = br32(bp, B44_SBINTVEC);
+	val |= cores;
+	bw32(bp, B44_SBINTVEC, val);
+
+	val = br32(bp, SSB_PCI_TRANS_2);
+	val |= SSB_PCI_PREF | SSB_PCI_BURST;
+	bw32(bp, SSB_PCI_TRANS_2, val);
+
+	pci_write_config_dword(bp->pdev, SSB_BAR0_WIN, bar_orig);
+
+	return pci_rev;
+}
+
+static void ssb_core_disable(struct b44 *bp)
+{
+	if (br32(bp, B44_SBTMSLOW) & SBTMSLOW_RESET)
+		return;
+
+	bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_CLOCK));
+	b44_wait_bit(bp, B44_SBTMSLOW, SBTMSLOW_REJECT, 100000, 0);
+	b44_wait_bit(bp, B44_SBTMSHIGH, SBTMSHIGH_BUSY, 100000, 1);
+	bw32(bp, B44_SBTMSLOW, (SBTMSLOW_FGC | SBTMSLOW_CLOCK |
+			    SBTMSLOW_REJECT | SBTMSLOW_RESET));
+	br32(bp, B44_SBTMSLOW);
+	udelay(1);
+	bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_RESET));
+	br32(bp, B44_SBTMSLOW);
+	udelay(1);
+}
+
+static void ssb_core_reset(struct b44 *bp)
+{
+	u32 val;
+
+	ssb_core_disable(bp);
+	bw32(bp, B44_SBTMSLOW, (SBTMSLOW_RESET | SBTMSLOW_CLOCK | SBTMSLOW_FGC));
+	br32(bp, B44_SBTMSLOW);
+	udelay(1);
+
+	/* Clear SERR if set, this is a hw bug workaround.  */
+	if (br32(bp, B44_SBTMSHIGH) & SBTMSHIGH_SERR)
+		bw32(bp, B44_SBTMSHIGH, 0);
+
+	val = br32(bp, B44_SBIMSTATE);
+	if (val & (SBIMSTATE_IBE | SBIMSTATE_TO))
+		bw32(bp, B44_SBIMSTATE, val & ~(SBIMSTATE_IBE | SBIMSTATE_TO));
+
+	bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK | SBTMSLOW_FGC));
+	br32(bp, B44_SBTMSLOW);
+	udelay(1);
+
+	bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK));
+	br32(bp, B44_SBTMSLOW);
+	udelay(1);
+}
+
+static int ssb_core_unit(struct b44 *bp)
+{
+#if 0
+	u32 val = br32(bp, B44_SBADMATCH0);
+	u32 base;
+
+	type = val & SBADMATCH0_TYPE_MASK;
+	switch (type) {
+	case 0:
+		base = val & SBADMATCH0_BS0_MASK;
+		break;
+
+	case 1:
+		base = val & SBADMATCH0_BS1_MASK;
+		break;
+
+	case 2:
+	default:
+		base = val & SBADMATCH0_BS2_MASK;
+		break;
+	};
+#endif
+	return 0;
+}
+
+static int ssb_is_core_up(struct b44 *bp)
+{
+	return ((br32(bp, B44_SBTMSLOW) & (SBTMSLOW_RESET | SBTMSLOW_REJECT | SBTMSLOW_CLOCK))
+		== SBTMSLOW_CLOCK);
+}
+
+static void __b44_cam_write(struct b44 *bp, unsigned char *data, int index)
+{
+	u32 val;
+
+	val  = ((u32) data[2]) << 24;
+	val |= ((u32) data[3]) << 16;
+	val |= ((u32) data[4]) <<  8;
+	val |= ((u32) data[5]) <<  0;
+	bw32(bp, B44_CAM_DATA_LO, val);
+	val = (CAM_DATA_HI_VALID | 
+	       (((u32) data[0]) << 8) |
+	       (((u32) data[1]) << 0));
+	bw32(bp, B44_CAM_DATA_HI, val);
+	bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
+			    (index << CAM_CTRL_INDEX_SHIFT)));
+	b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);	
+}
+
+static inline void __b44_disable_ints(struct b44 *bp)
+{
+	bw32(bp, B44_IMASK, 0);
+}
+
+static void b44_disable_ints(struct b44 *bp)
+{
+	__b44_disable_ints(bp);
+
+	/* Flush posted writes. */
+	br32(bp, B44_IMASK);
+}
+
+static void b44_enable_ints(struct b44 *bp)
+{
+	bw32(bp, B44_IMASK, bp->imask);
+}
+
+static int b44_readphy(struct b44 *bp, int reg, u32 *val)
+{
+	int err;
+
+	bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
+	bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
+			     (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
+			     (bp->phy_addr << MDIO_DATA_PMD_SHIFT) |
+			     (reg << MDIO_DATA_RA_SHIFT) |
+			     (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
+	err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
+	*val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
+
+	return err;
+}
+
+static int b44_writephy(struct b44 *bp, int reg, u32 val)
+{
+	bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
+	bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
+			     (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
+			     (bp->phy_addr << MDIO_DATA_PMD_SHIFT) |
+			     (reg << MDIO_DATA_RA_SHIFT) |
+			     (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
+			     (val & MDIO_DATA_DATA)));
+	return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
+}
+
+/* miilib interface */
+/* FIXME FIXME: phy_id is ignored, bp->phy_addr use is unconditional
+ * due to code existing before miilib use was added to this driver.
+ * Someone should remove this artificial driver limitation in
+ * b44_{read,write}phy.  bp->phy_addr itself is fine (and needed).
+ */
+static int b44_mii_read(struct net_device *dev, int phy_id, int location)
+{
+	u32 val;
+	struct b44 *bp = netdev_priv(dev);
+	int rc = b44_readphy(bp, location, &val);
+	if (rc)
+		return 0xffffffff;
+	return val;
+}
+
+static void b44_mii_write(struct net_device *dev, int phy_id, int location,
+			 int val)
+{
+	struct b44 *bp = netdev_priv(dev);
+	b44_writephy(bp, location, val);
+}
+
+static int b44_phy_reset(struct b44 *bp)
+{
+	u32 val;
+	int err;
+
+	err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
+	if (err)
+		return err;
+	udelay(100);
+	err = b44_readphy(bp, MII_BMCR, &val);
+	if (!err) {
+		if (val & BMCR_RESET) {
+			printk(KERN_ERR PFX "%s: PHY Reset would not complete.\n",
+			       bp->dev->name);
+			err = -ENODEV;
+		}
+	}
+
+	return 0;
+}
+
+static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
+{
+	u32 val;
+
+	bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
+	bp->flags |= pause_flags;
+
+	val = br32(bp, B44_RXCONFIG);
+	if (pause_flags & B44_FLAG_RX_PAUSE)
+		val |= RXCONFIG_FLOW;
+	else
+		val &= ~RXCONFIG_FLOW;
+	bw32(bp, B44_RXCONFIG, val);
+
+	val = br32(bp, B44_MAC_FLOW);
+	if (pause_flags & B44_FLAG_TX_PAUSE)
+		val |= (MAC_FLOW_PAUSE_ENAB |
+			(0xc0 & MAC_FLOW_RX_HI_WATER));
+	else
+		val &= ~MAC_FLOW_PAUSE_ENAB;
+	bw32(bp, B44_MAC_FLOW, val);
+}
+
+static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
+{
+	u32 pause_enab = bp->flags & (B44_FLAG_TX_PAUSE |
+				      B44_FLAG_RX_PAUSE);
+
+	if (local & ADVERTISE_PAUSE_CAP) {
+		if (local & ADVERTISE_PAUSE_ASYM) {
+			if (remote & LPA_PAUSE_CAP)
+				pause_enab |= (B44_FLAG_TX_PAUSE |
+					       B44_FLAG_RX_PAUSE);
+			else if (remote & LPA_PAUSE_ASYM)
+				pause_enab |= B44_FLAG_RX_PAUSE;
+		} else {
+			if (remote & LPA_PAUSE_CAP)
+				pause_enab |= (B44_FLAG_TX_PAUSE |
+					       B44_FLAG_RX_PAUSE);
+		}
+	} else if (local & ADVERTISE_PAUSE_ASYM) {
+		if ((remote & LPA_PAUSE_CAP) &&
+		    (remote & LPA_PAUSE_ASYM))
+			pause_enab |= B44_FLAG_TX_PAUSE;
+	}
+
+	__b44_set_flow_ctrl(bp, pause_enab);
+}
+
+static int b44_setup_phy(struct b44 *bp)
+{
+	u32 val;
+	int err;
+
+	if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
+		goto out;
+	if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
+				val & MII_ALEDCTRL_ALLMSK)) != 0)
+		goto out;
+	if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
+		goto out;
+	if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
+				val | MII_TLEDCTRL_ENABLE)) != 0)
+		goto out;
+
+	if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
+		u32 adv = ADVERTISE_CSMA;
+
+		if (bp->flags & B44_FLAG_ADV_10HALF)
+			adv |= ADVERTISE_10HALF;
+		if (bp->flags & B44_FLAG_ADV_10FULL)
+			adv |= ADVERTISE_10FULL;
+		if (bp->flags & B44_FLAG_ADV_100HALF)
+			adv |= ADVERTISE_100HALF;
+		if (bp->flags & B44_FLAG_ADV_100FULL)
+			adv |= ADVERTISE_100FULL;
+
+		if (bp->flags & B44_FLAG_PAUSE_AUTO)
+			adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
+
+		if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
+			goto out;
+		if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
+						       BMCR_ANRESTART))) != 0)
+			goto out;
+	} else {
+		u32 bmcr;
+
+		if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
+			goto out;
+		bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
+		if (bp->flags & B44_FLAG_100_BASE_T)
+			bmcr |= BMCR_SPEED100;
+		if (bp->flags & B44_FLAG_FULL_DUPLEX)
+			bmcr |= BMCR_FULLDPLX;
+		if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
+			goto out;
+
+		/* Since we will not be negotiating there is no safe way
+		 * to determine if the link partner supports flow control
+		 * or not.  So just disable it completely in this case.
+		 */
+		b44_set_flow_ctrl(bp, 0, 0);
+	}
+
+out:
+	return err;
+}
+
+static void b44_stats_update(struct b44 *bp)
+{
+	unsigned long reg;
+	u32 *val;
+
+	val = &bp->hw_stats.tx_good_octets;
+	for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
+		*val++ += br32(bp, reg);
+	}
+	val = &bp->hw_stats.rx_good_octets;
+	for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
+		*val++ += br32(bp, reg);
+	}
+}
+
+static void b44_link_report(struct b44 *bp)
+{
+	if (!netif_carrier_ok(bp->dev)) {
+		printk(KERN_INFO PFX "%s: Link is down.\n", bp->dev->name);
+	} else {
+		printk(KERN_INFO PFX "%s: Link is up at %d Mbps, %s duplex.\n",
+		       bp->dev->name,
+		       (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
+		       (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
+
+		printk(KERN_INFO PFX "%s: Flow control is %s for TX and "
+		       "%s for RX.\n",
+		       bp->dev->name,
+		       (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
+		       (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
+	}
+}
+
+static void b44_check_phy(struct b44 *bp)
+{
+	u32 bmsr, aux;
+
+	if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
+	    !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
+	    (bmsr != 0xffff)) {
+		if (aux & MII_AUXCTRL_SPEED)
+			bp->flags |= B44_FLAG_100_BASE_T;
+		else
+			bp->flags &= ~B44_FLAG_100_BASE_T;
+		if (aux & MII_AUXCTRL_DUPLEX)
+			bp->flags |= B44_FLAG_FULL_DUPLEX;
+		else
+			bp->flags &= ~B44_FLAG_FULL_DUPLEX;
+
+		if (!netif_carrier_ok(bp->dev) &&
+		    (bmsr & BMSR_LSTATUS)) {
+			u32 val = br32(bp, B44_TX_CTRL);
+			u32 local_adv, remote_adv;
+
+			if (bp->flags & B44_FLAG_FULL_DUPLEX)
+				val |= TX_CTRL_DUPLEX;
+			else
+				val &= ~TX_CTRL_DUPLEX;
+			bw32(bp, B44_TX_CTRL, val);
+
+			if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
+			    !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
+			    !b44_readphy(bp, MII_LPA, &remote_adv))
+				b44_set_flow_ctrl(bp, local_adv, remote_adv);
+
+			/* Link now up */
+			netif_carrier_on(bp->dev);
+			b44_link_report(bp);
+		} else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
+			/* Link now down */
+			netif_carrier_off(bp->dev);
+			b44_link_report(bp);
+		}
+
+		if (bmsr & BMSR_RFAULT)
+			printk(KERN_WARNING PFX "%s: Remote fault detected in PHY\n",
+			       bp->dev->name);
+		if (bmsr & BMSR_JCD)
+			printk(KERN_WARNING PFX "%s: Jabber detected in PHY\n",
+			       bp->dev->name);
+	}
+}
+
+static void b44_timer(unsigned long __opaque)
+{
+	struct b44 *bp = (struct b44 *) __opaque;
+
+	spin_lock_irq(&bp->lock);
+
+	b44_check_phy(bp);
+
+	b44_stats_update(bp);
+
+	spin_unlock_irq(&bp->lock);
+
+	bp->timer.expires = jiffies + HZ;
+	add_timer(&bp->timer);
+}
+
+static void b44_tx(struct b44 *bp)
+{
+	u32 cur, cons;
+
+	cur  = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
+	cur /= sizeof(struct dma_desc);
+
+	/* XXX needs updating when NETIF_F_SG is supported */
+	for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
+		struct ring_info *rp = &bp->tx_buffers[cons];
+		struct sk_buff *skb = rp->skb;
+
+		if (unlikely(skb == NULL))
+			BUG();
+
+		pci_unmap_single(bp->pdev,
+				 pci_unmap_addr(rp, mapping),
+				 skb->len,
+				 PCI_DMA_TODEVICE);
+		rp->skb = NULL;
+		dev_kfree_skb_irq(skb);
+	}
+
+	bp->tx_cons = cons;
+	if (netif_queue_stopped(bp->dev) &&
+	    TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
+		netif_wake_queue(bp->dev);
+
+	bw32(bp, B44_GPTIMER, 0);
+}
+
+/* Works like this.  This chip writes a 'struct rx_header" 30 bytes
+ * before the DMA address you give it.  So we allocate 30 more bytes
+ * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
+ * point the chip at 30 bytes past where the rx_header will go.
+ */
+static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
+{
+	struct dma_desc *dp;
+	struct ring_info *src_map, *map;
+	struct rx_header *rh;
+	struct sk_buff *skb;
+	dma_addr_t mapping;
+	int dest_idx;
+	u32 ctrl;
+
+	src_map = NULL;
+	if (src_idx >= 0)
+		src_map = &bp->rx_buffers[src_idx];
+	dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
+	map = &bp->rx_buffers[dest_idx];
+	skb = dev_alloc_skb(RX_PKT_BUF_SZ);
+	if (skb == NULL)
+		return -ENOMEM;
+
+	mapping = pci_map_single(bp->pdev, skb->data,
+				 RX_PKT_BUF_SZ,
+				 PCI_DMA_FROMDEVICE);
+
+	/* Hardware bug work-around, the chip is unable to do PCI DMA
+	   to/from anything above 1GB :-( */
+	if(mapping+RX_PKT_BUF_SZ > B44_DMA_MASK) {
+		/* Sigh... */
+		pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE);
+		dev_kfree_skb_any(skb);
+		skb = __dev_alloc_skb(RX_PKT_BUF_SZ,GFP_DMA);
+		if (skb == NULL)
+			return -ENOMEM;
+		mapping = pci_map_single(bp->pdev, skb->data,
+					 RX_PKT_BUF_SZ,
+					 PCI_DMA_FROMDEVICE);
+		if(mapping+RX_PKT_BUF_SZ > B44_DMA_MASK) {
+			pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE);
+			dev_kfree_skb_any(skb);
+			return -ENOMEM;
+		}
+	}
+
+	skb->dev = bp->dev;
+	skb_reserve(skb, bp->rx_offset);
+
+	rh = (struct rx_header *)
+		(skb->data - bp->rx_offset);
+	rh->len = 0;
+	rh->flags = 0;
+
+	map->skb = skb;
+	pci_unmap_addr_set(map, mapping, mapping);
+
+	if (src_map != NULL)
+		src_map->skb = NULL;
+
+	ctrl  = (DESC_CTRL_LEN & (RX_PKT_BUF_SZ - bp->rx_offset));
+	if (dest_idx == (B44_RX_RING_SIZE - 1))
+		ctrl |= DESC_CTRL_EOT;
+
+	dp = &bp->rx_ring[dest_idx];
+	dp->ctrl = cpu_to_le32(ctrl);
+	dp->addr = cpu_to_le32((u32) mapping + bp->rx_offset + bp->dma_offset);
+
+	return RX_PKT_BUF_SZ;
+}
+
+static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
+{
+	struct dma_desc *src_desc, *dest_desc;
+	struct ring_info *src_map, *dest_map;
+	struct rx_header *rh;
+	int dest_idx;
+	u32 ctrl;
+
+	dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
+	dest_desc = &bp->rx_ring[dest_idx];
+	dest_map = &bp->rx_buffers[dest_idx];
+	src_desc = &bp->rx_ring[src_idx];
+	src_map = &bp->rx_buffers[src_idx];
+
+	dest_map->skb = src_map->skb;
+	rh = (struct rx_header *) src_map->skb->data;
+	rh->len = 0;
+	rh->flags = 0;
+	pci_unmap_addr_set(dest_map, mapping,
+			   pci_unmap_addr(src_map, mapping));
+
+	ctrl = src_desc->ctrl;
+	if (dest_idx == (B44_RX_RING_SIZE - 1))
+		ctrl |= cpu_to_le32(DESC_CTRL_EOT);
+	else
+		ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
+
+	dest_desc->ctrl = ctrl;
+	dest_desc->addr = src_desc->addr;
+	src_map->skb = NULL;
+
+	pci_dma_sync_single_for_device(bp->pdev, src_desc->addr,
+				       RX_PKT_BUF_SZ,
+				       PCI_DMA_FROMDEVICE);
+}
+
+static int b44_rx(struct b44 *bp, int budget)
+{
+	int received;
+	u32 cons, prod;
+
+	received = 0;
+	prod  = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
+	prod /= sizeof(struct dma_desc);
+	cons = bp->rx_cons;
+
+	while (cons != prod && budget > 0) {
+		struct ring_info *rp = &bp->rx_buffers[cons];
+		struct sk_buff *skb = rp->skb;
+		dma_addr_t map = pci_unmap_addr(rp, mapping);
+		struct rx_header *rh;
+		u16 len;
+
+		pci_dma_sync_single_for_cpu(bp->pdev, map,
+					    RX_PKT_BUF_SZ,
+					    PCI_DMA_FROMDEVICE);
+		rh = (struct rx_header *) skb->data;
+		len = cpu_to_le16(rh->len);
+		if ((len > (RX_PKT_BUF_SZ - bp->rx_offset)) ||
+		    (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
+		drop_it:
+			b44_recycle_rx(bp, cons, bp->rx_prod);
+		drop_it_no_recycle:
+			bp->stats.rx_dropped++;
+			goto next_pkt;
+		}
+
+		if (len == 0) {
+			int i = 0;
+
+			do {
+				udelay(2);
+				barrier();
+				len = cpu_to_le16(rh->len);
+			} while (len == 0 && i++ < 5);
+			if (len == 0)
+				goto drop_it;
+		}
+
+		/* Omit CRC. */
+		len -= 4;
+
+		if (len > RX_COPY_THRESHOLD) {
+			int skb_size;
+			skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
+			if (skb_size < 0)
+				goto drop_it;
+			pci_unmap_single(bp->pdev, map,
+					 skb_size, PCI_DMA_FROMDEVICE);
+			/* Leave out rx_header */
+                	skb_put(skb, len+bp->rx_offset);
+            	        skb_pull(skb,bp->rx_offset);
+		} else {
+			struct sk_buff *copy_skb;
+
+			b44_recycle_rx(bp, cons, bp->rx_prod);
+			copy_skb = dev_alloc_skb(len + 2);
+			if (copy_skb == NULL)
+				goto drop_it_no_recycle;
+
+			copy_skb->dev = bp->dev;
+			skb_reserve(copy_skb, 2);
+			skb_put(copy_skb, len);
+			/* DMA sync done above, copy just the actual packet */
+			memcpy(copy_skb->data, skb->data+bp->rx_offset, len);
+
+			skb = copy_skb;
+		}
+		skb->ip_summed = CHECKSUM_NONE;
+		skb->protocol = eth_type_trans(skb, bp->dev);
+		netif_receive_skb(skb);
+		bp->dev->last_rx = jiffies;
+		received++;
+		budget--;
+	next_pkt:
+		bp->rx_prod = (bp->rx_prod + 1) &
+			(B44_RX_RING_SIZE - 1);
+		cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
+	}
+
+	bp->rx_cons = cons;
+	bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
+
+	return received;
+}
+
+static int b44_poll(struct net_device *netdev, int *budget)
+{
+	struct b44 *bp = netdev_priv(netdev);
+	int done;
+
+	spin_lock_irq(&bp->lock);
+
+	if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
+		/* spin_lock(&bp->tx_lock); */
+		b44_tx(bp);
+		/* spin_unlock(&bp->tx_lock); */
+	}
+	spin_unlock_irq(&bp->lock);
+
+	done = 1;
+	if (bp->istat & ISTAT_RX) {
+		int orig_budget = *budget;
+		int work_done;
+
+		if (orig_budget > netdev->quota)
+			orig_budget = netdev->quota;
+
+		work_done = b44_rx(bp, orig_budget);
+
+		*budget -= work_done;
+		netdev->quota -= work_done;
+
+		if (work_done >= orig_budget)
+			done = 0;
+	}
+
+	if (bp->istat & ISTAT_ERRORS) {
+		spin_lock_irq(&bp->lock);
+		b44_halt(bp);
+		b44_init_rings(bp);
+		b44_init_hw(bp);
+		netif_wake_queue(bp->dev);
+		spin_unlock_irq(&bp->lock);
+		done = 1;
+	}
+
+	if (done) {
+		netif_rx_complete(netdev);
+		b44_enable_ints(bp);
+	}
+
+	return (done ? 0 : 1);
+}
+
+static irqreturn_t b44_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct net_device *dev = dev_id;
+	struct b44 *bp = netdev_priv(dev);
+	unsigned long flags;
+	u32 istat, imask;
+	int handled = 0;
+
+	spin_lock_irqsave(&bp->lock, flags);
+
+	istat = br32(bp, B44_ISTAT);
+	imask = br32(bp, B44_IMASK);
+
+	/* ??? What the fuck is the purpose of the interrupt mask
+	 * ??? register if we have to mask it out by hand anyways?
+	 */
+	istat &= imask;
+	if (istat) {
+		handled = 1;
+		if (netif_rx_schedule_prep(dev)) {
+			/* NOTE: These writes are posted by the readback of
+			 *       the ISTAT register below.
+			 */
+			bp->istat = istat;
+			__b44_disable_ints(bp);
+			__netif_rx_schedule(dev);
+		} else {
+			printk(KERN_ERR PFX "%s: Error, poll already scheduled\n",
+			       dev->name);
+		}
+
+		bw32(bp, B44_ISTAT, istat);
+		br32(bp, B44_ISTAT);
+	}
+	spin_unlock_irqrestore(&bp->lock, flags);
+	return IRQ_RETVAL(handled);
+}
+
+static void b44_tx_timeout(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	printk(KERN_ERR PFX "%s: transmit timed out, resetting\n",
+	       dev->name);
+
+	spin_lock_irq(&bp->lock);
+
+	b44_halt(bp);
+	b44_init_rings(bp);
+	b44_init_hw(bp);
+
+	spin_unlock_irq(&bp->lock);
+
+	b44_enable_ints(bp);
+
+	netif_wake_queue(dev);
+}
+
+static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+	struct sk_buff *bounce_skb;
+	dma_addr_t mapping;
+	u32 len, entry, ctrl;
+
+	len = skb->len;
+	spin_lock_irq(&bp->lock);
+
+	/* This is a hard error, log it. */
+	if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
+		netif_stop_queue(dev);
+		spin_unlock_irq(&bp->lock);
+		printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
+		       dev->name);
+		return 1;
+	}
+
+	mapping = pci_map_single(bp->pdev, skb->data, len, PCI_DMA_TODEVICE);
+	if(mapping+len > B44_DMA_MASK) {
+		/* Chip can't handle DMA to/from >1GB, use bounce buffer */
+		pci_unmap_single(bp->pdev, mapping, len, PCI_DMA_TODEVICE);
+
+		bounce_skb = __dev_alloc_skb(TX_PKT_BUF_SZ,
+					     GFP_ATOMIC|GFP_DMA);
+		if (!bounce_skb)
+			return NETDEV_TX_BUSY;
+
+		mapping = pci_map_single(bp->pdev, bounce_skb->data,
+					 len, PCI_DMA_TODEVICE);
+		if(mapping+len > B44_DMA_MASK) {
+			pci_unmap_single(bp->pdev, mapping,
+					 len, PCI_DMA_TODEVICE);
+			dev_kfree_skb_any(bounce_skb);
+			return NETDEV_TX_BUSY;
+		}
+
+		memcpy(skb_put(bounce_skb, len), skb->data, skb->len);
+		dev_kfree_skb_any(skb);
+		skb = bounce_skb;
+	}
+
+	entry = bp->tx_prod;
+	bp->tx_buffers[entry].skb = skb;
+	pci_unmap_addr_set(&bp->tx_buffers[entry], mapping, mapping);
+
+	ctrl  = (len & DESC_CTRL_LEN);
+	ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
+	if (entry == (B44_TX_RING_SIZE - 1))
+		ctrl |= DESC_CTRL_EOT;
+
+	bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
+	bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
+
+	entry = NEXT_TX(entry);
+
+	bp->tx_prod = entry;
+
+	wmb();
+
+	bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
+	if (bp->flags & B44_FLAG_BUGGY_TXPTR)
+		bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
+	if (bp->flags & B44_FLAG_REORDER_BUG)
+		br32(bp, B44_DMATX_PTR);
+
+	if (TX_BUFFS_AVAIL(bp) < 1)
+		netif_stop_queue(dev);
+
+	spin_unlock_irq(&bp->lock);
+
+	dev->trans_start = jiffies;
+
+	return 0;
+}
+
+static int b44_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
+		return -EINVAL;
+
+	if (!netif_running(dev)) {
+		/* We'll just catch it later when the
+		 * device is up'd.
+		 */
+		dev->mtu = new_mtu;
+		return 0;
+	}
+
+	spin_lock_irq(&bp->lock);
+	b44_halt(bp);
+	dev->mtu = new_mtu;
+	b44_init_rings(bp);
+	b44_init_hw(bp);
+	spin_unlock_irq(&bp->lock);
+
+	b44_enable_ints(bp);
+	
+	return 0;
+}
+
+/* Free up pending packets in all rx/tx rings.
+ *
+ * The chip has been shut down and the driver detached from
+ * the networking, so no interrupts or new tx packets will
+ * end up in the driver.  bp->lock is not held and we are not
+ * in an interrupt context and thus may sleep.
+ */
+static void b44_free_rings(struct b44 *bp)
+{
+	struct ring_info *rp;
+	int i;
+
+	for (i = 0; i < B44_RX_RING_SIZE; i++) {
+		rp = &bp->rx_buffers[i];
+
+		if (rp->skb == NULL)
+			continue;
+		pci_unmap_single(bp->pdev,
+				 pci_unmap_addr(rp, mapping),
+				 RX_PKT_BUF_SZ,
+				 PCI_DMA_FROMDEVICE);
+		dev_kfree_skb_any(rp->skb);
+		rp->skb = NULL;
+	}
+
+	/* XXX needs changes once NETIF_F_SG is set... */
+	for (i = 0; i < B44_TX_RING_SIZE; i++) {
+		rp = &bp->tx_buffers[i];
+
+		if (rp->skb == NULL)
+			continue;
+		pci_unmap_single(bp->pdev,
+				 pci_unmap_addr(rp, mapping),
+				 rp->skb->len,
+				 PCI_DMA_TODEVICE);
+		dev_kfree_skb_any(rp->skb);
+		rp->skb = NULL;
+	}
+}
+
+/* Initialize tx/rx rings for packet processing.
+ *
+ * The chip has been shut down and the driver detached from
+ * the networking, so no interrupts or new tx packets will
+ * end up in the driver.  bp->lock is not held and we are not
+ * in an interrupt context and thus may sleep.
+ */
+static void b44_init_rings(struct b44 *bp)
+{
+	int i;
+
+	b44_free_rings(bp);
+
+	memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
+	memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
+
+	for (i = 0; i < bp->rx_pending; i++) {
+		if (b44_alloc_rx_skb(bp, -1, i) < 0)
+			break;
+	}
+}
+
+/*
+ * Must not be invoked with interrupt sources disabled and
+ * the hardware shutdown down.
+ */
+static void b44_free_consistent(struct b44 *bp)
+{
+	if (bp->rx_buffers) {
+		kfree(bp->rx_buffers);
+		bp->rx_buffers = NULL;
+	}
+	if (bp->tx_buffers) {
+		kfree(bp->tx_buffers);
+		bp->tx_buffers = NULL;
+	}
+	if (bp->rx_ring) {
+		pci_free_consistent(bp->pdev, DMA_TABLE_BYTES,
+				    bp->rx_ring, bp->rx_ring_dma);
+		bp->rx_ring = NULL;
+	}
+	if (bp->tx_ring) {
+		pci_free_consistent(bp->pdev, DMA_TABLE_BYTES,
+				    bp->tx_ring, bp->tx_ring_dma);
+		bp->tx_ring = NULL;
+	}
+}
+
+/*
+ * Must not be invoked with interrupt sources disabled and
+ * the hardware shutdown down.  Can sleep.
+ */
+static int b44_alloc_consistent(struct b44 *bp)
+{
+	int size;
+
+	size  = B44_RX_RING_SIZE * sizeof(struct ring_info);
+	bp->rx_buffers = kmalloc(size, GFP_KERNEL);
+	if (!bp->rx_buffers)
+		goto out_err;
+	memset(bp->rx_buffers, 0, size);
+
+	size = B44_TX_RING_SIZE * sizeof(struct ring_info);
+	bp->tx_buffers = kmalloc(size, GFP_KERNEL);
+	if (!bp->tx_buffers)
+		goto out_err;
+	memset(bp->tx_buffers, 0, size);
+
+	size = DMA_TABLE_BYTES;
+	bp->rx_ring = pci_alloc_consistent(bp->pdev, size, &bp->rx_ring_dma);
+	if (!bp->rx_ring)
+		goto out_err;
+
+	bp->tx_ring = pci_alloc_consistent(bp->pdev, size, &bp->tx_ring_dma);
+	if (!bp->tx_ring)
+		goto out_err;
+
+	return 0;
+
+out_err:
+	b44_free_consistent(bp);
+	return -ENOMEM;
+}
+
+/* bp->lock is held. */
+static void b44_clear_stats(struct b44 *bp)
+{
+	unsigned long reg;
+
+	bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
+	for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
+		br32(bp, reg);
+	for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
+		br32(bp, reg);
+}
+
+/* bp->lock is held. */
+static void b44_chip_reset(struct b44 *bp)
+{
+	if (ssb_is_core_up(bp)) {
+		bw32(bp, B44_RCV_LAZY, 0);
+		bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
+		b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 100, 1);
+		bw32(bp, B44_DMATX_CTRL, 0);
+		bp->tx_prod = bp->tx_cons = 0;
+		if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
+			b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
+				     100, 0);
+		}
+		bw32(bp, B44_DMARX_CTRL, 0);
+		bp->rx_prod = bp->rx_cons = 0;
+	} else {
+		ssb_pci_setup(bp, (bp->core_unit == 0 ?
+				   SBINTVEC_ENET0 :
+				   SBINTVEC_ENET1));
+	}
+
+	ssb_core_reset(bp);
+
+	b44_clear_stats(bp);
+
+	/* Make PHY accessible. */
+	bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
+			     (0x0d & MDIO_CTRL_MAXF_MASK)));
+	br32(bp, B44_MDIO_CTRL);
+
+	if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
+		bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
+		br32(bp, B44_ENET_CTRL);
+		bp->flags &= ~B44_FLAG_INTERNAL_PHY;
+	} else {
+		u32 val = br32(bp, B44_DEVCTRL);
+
+		if (val & DEVCTRL_EPR) {
+			bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
+			br32(bp, B44_DEVCTRL);
+			udelay(100);
+		}
+		bp->flags |= B44_FLAG_INTERNAL_PHY;
+	}
+}
+
+/* bp->lock is held. */
+static void b44_halt(struct b44 *bp)
+{
+	b44_disable_ints(bp);
+	b44_chip_reset(bp);
+}
+
+/* bp->lock is held. */
+static void __b44_set_mac_addr(struct b44 *bp)
+{
+	bw32(bp, B44_CAM_CTRL, 0);
+	if (!(bp->dev->flags & IFF_PROMISC)) {
+		u32 val;
+
+		__b44_cam_write(bp, bp->dev->dev_addr, 0);
+		val = br32(bp, B44_CAM_CTRL);
+		bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
+	}
+}
+
+static int b44_set_mac_addr(struct net_device *dev, void *p)
+{
+	struct b44 *bp = netdev_priv(dev);
+	struct sockaddr *addr = p;
+
+	if (netif_running(dev))
+		return -EBUSY;
+
+	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
+
+	spin_lock_irq(&bp->lock);
+	__b44_set_mac_addr(bp);
+	spin_unlock_irq(&bp->lock);
+
+	return 0;
+}
+
+/* Called at device open time to get the chip ready for
+ * packet processing.  Invoked with bp->lock held.
+ */
+static void __b44_set_rx_mode(struct net_device *);
+static void b44_init_hw(struct b44 *bp)
+{
+	u32 val;
+
+	b44_chip_reset(bp);
+	b44_phy_reset(bp);
+	b44_setup_phy(bp);
+
+	/* Enable CRC32, set proper LED modes and power on PHY */
+	bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
+	bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
+
+	/* This sets the MAC address too.  */
+	__b44_set_rx_mode(bp->dev);
+
+	/* MTU + eth header + possible VLAN tag + struct rx_header */
+	bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
+	bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
+
+	bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
+	bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
+	bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
+	bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
+			      (bp->rx_offset << DMARX_CTRL_ROSHIFT)));
+	bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
+
+	bw32(bp, B44_DMARX_PTR, bp->rx_pending);
+	bp->rx_prod = bp->rx_pending;	
+
+	bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
+
+	val = br32(bp, B44_ENET_CTRL);
+	bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
+}
+
+static int b44_open(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+	int err;
+
+	err = b44_alloc_consistent(bp);
+	if (err)
+		return err;
+
+	err = request_irq(dev->irq, b44_interrupt, SA_SHIRQ, dev->name, dev);
+	if (err)
+		goto err_out_free;
+
+	spin_lock_irq(&bp->lock);
+
+	b44_init_rings(bp);
+	b44_init_hw(bp);
+	bp->flags |= B44_FLAG_INIT_COMPLETE;
+
+	spin_unlock_irq(&bp->lock);
+
+	init_timer(&bp->timer);
+	bp->timer.expires = jiffies + HZ;
+	bp->timer.data = (unsigned long) bp;
+	bp->timer.function = b44_timer;
+	add_timer(&bp->timer);
+
+	b44_enable_ints(bp);
+
+	return 0;
+
+err_out_free:
+	b44_free_consistent(bp);
+	return err;
+}
+
+#if 0
+/*static*/ void b44_dump_state(struct b44 *bp)
+{
+	u32 val32, val32_2, val32_3, val32_4, val32_5;
+	u16 val16;
+
+	pci_read_config_word(bp->pdev, PCI_STATUS, &val16);
+	printk("DEBUG: PCI status [%04x] \n", val16);
+
+}
+#endif
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling receive - used by netconsole and other diagnostic tools
+ * to allow network i/o with interrupts disabled.
+ */
+static void b44_poll_controller(struct net_device *dev)
+{
+	disable_irq(dev->irq);
+	b44_interrupt(dev->irq, dev, NULL);
+	enable_irq(dev->irq);
+}
+#endif
+
+static int b44_close(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	netif_stop_queue(dev);
+
+	del_timer_sync(&bp->timer);
+
+	spin_lock_irq(&bp->lock);
+
+#if 0
+	b44_dump_state(bp);
+#endif
+	b44_halt(bp);
+	b44_free_rings(bp);
+	bp->flags &= ~B44_FLAG_INIT_COMPLETE;
+	netif_carrier_off(bp->dev);
+
+	spin_unlock_irq(&bp->lock);
+
+	free_irq(dev->irq, dev);
+
+	b44_free_consistent(bp);
+
+	return 0;
+}
+
+static struct net_device_stats *b44_get_stats(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+	struct net_device_stats *nstat = &bp->stats;
+	struct b44_hw_stats *hwstat = &bp->hw_stats;
+
+	/* Convert HW stats into netdevice stats. */
+	nstat->rx_packets = hwstat->rx_pkts;
+	nstat->tx_packets = hwstat->tx_pkts;
+	nstat->rx_bytes   = hwstat->rx_octets;
+	nstat->tx_bytes   = hwstat->tx_octets;
+	nstat->tx_errors  = (hwstat->tx_jabber_pkts +
+			     hwstat->tx_oversize_pkts +
+			     hwstat->tx_underruns +
+			     hwstat->tx_excessive_cols +
+			     hwstat->tx_late_cols);
+	nstat->multicast  = hwstat->tx_multicast_pkts;
+	nstat->collisions = hwstat->tx_total_cols;
+
+	nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
+				   hwstat->rx_undersize);
+	nstat->rx_over_errors   = hwstat->rx_missed_pkts;
+	nstat->rx_frame_errors  = hwstat->rx_align_errs;
+	nstat->rx_crc_errors    = hwstat->rx_crc_errs;
+	nstat->rx_errors        = (hwstat->rx_jabber_pkts +
+				   hwstat->rx_oversize_pkts +
+				   hwstat->rx_missed_pkts +
+				   hwstat->rx_crc_align_errs +
+				   hwstat->rx_undersize +
+				   hwstat->rx_crc_errs +
+				   hwstat->rx_align_errs +
+				   hwstat->rx_symbol_errs);
+
+	nstat->tx_aborted_errors = hwstat->tx_underruns;
+#if 0
+	/* Carrier lost counter seems to be broken for some devices */
+	nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
+#endif
+
+	return nstat;
+}
+
+static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
+{
+	struct dev_mc_list *mclist;
+	int i, num_ents;
+
+	num_ents = min_t(int, dev->mc_count, B44_MCAST_TABLE_SIZE);
+	mclist = dev->mc_list;
+	for (i = 0; mclist && i < num_ents; i++, mclist = mclist->next) {
+		__b44_cam_write(bp, mclist->dmi_addr, i + 1);
+	}
+	return i+1;
+}
+
+static void __b44_set_rx_mode(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+	u32 val;
+	int i=0;
+	unsigned char zero[6] = {0,0,0,0,0,0};
+
+	val = br32(bp, B44_RXCONFIG);
+	val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
+	if (dev->flags & IFF_PROMISC) {
+		val |= RXCONFIG_PROMISC;
+		bw32(bp, B44_RXCONFIG, val);
+	} else {
+		__b44_set_mac_addr(bp);
+
+		if (dev->flags & IFF_ALLMULTI)
+			val |= RXCONFIG_ALLMULTI;
+		else
+			i=__b44_load_mcast(bp, dev);
+		
+		for(;i<64;i++) {
+			__b44_cam_write(bp, zero, i);			
+		}
+		bw32(bp, B44_RXCONFIG, val);
+        	val = br32(bp, B44_CAM_CTRL);
+	        bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
+	}
+}
+
+static void b44_set_rx_mode(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	spin_lock_irq(&bp->lock);
+	__b44_set_rx_mode(dev);
+	spin_unlock_irq(&bp->lock);
+}
+
+static u32 b44_get_msglevel(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+	return bp->msg_enable;
+}
+
+static void b44_set_msglevel(struct net_device *dev, u32 value)
+{
+	struct b44 *bp = netdev_priv(dev);
+	bp->msg_enable = value;
+}
+
+static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
+{
+	struct b44 *bp = netdev_priv(dev);
+	struct pci_dev *pci_dev = bp->pdev;
+
+	strcpy (info->driver, DRV_MODULE_NAME);
+	strcpy (info->version, DRV_MODULE_VERSION);
+	strcpy (info->bus_info, pci_name(pci_dev));
+}
+
+static int b44_nway_reset(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+	u32 bmcr;
+	int r;
+
+	spin_lock_irq(&bp->lock);
+	b44_readphy(bp, MII_BMCR, &bmcr);
+	b44_readphy(bp, MII_BMCR, &bmcr);
+	r = -EINVAL;
+	if (bmcr & BMCR_ANENABLE) {
+		b44_writephy(bp, MII_BMCR,
+			     bmcr | BMCR_ANRESTART);
+		r = 0;
+	}
+	spin_unlock_irq(&bp->lock);
+
+	return r;
+}
+
+static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	if (!(bp->flags & B44_FLAG_INIT_COMPLETE))
+		return -EAGAIN;
+	cmd->supported = (SUPPORTED_Autoneg);
+	cmd->supported |= (SUPPORTED_100baseT_Half |
+			  SUPPORTED_100baseT_Full |
+			  SUPPORTED_10baseT_Half |
+			  SUPPORTED_10baseT_Full |
+			  SUPPORTED_MII);
+
+	cmd->advertising = 0;
+	if (bp->flags & B44_FLAG_ADV_10HALF)
+		cmd->advertising |= ADVERTISE_10HALF;
+	if (bp->flags & B44_FLAG_ADV_10FULL)
+		cmd->advertising |= ADVERTISE_10FULL;
+	if (bp->flags & B44_FLAG_ADV_100HALF)
+		cmd->advertising |= ADVERTISE_100HALF;
+	if (bp->flags & B44_FLAG_ADV_100FULL)
+		cmd->advertising |= ADVERTISE_100FULL;
+	cmd->advertising |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
+	cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
+		SPEED_100 : SPEED_10;
+	cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
+		DUPLEX_FULL : DUPLEX_HALF;
+	cmd->port = 0;
+	cmd->phy_address = bp->phy_addr;
+	cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
+		XCVR_INTERNAL : XCVR_EXTERNAL;
+	cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
+		AUTONEG_DISABLE : AUTONEG_ENABLE;
+	cmd->maxtxpkt = 0;
+	cmd->maxrxpkt = 0;
+	return 0;
+}
+
+static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	if (!(bp->flags & B44_FLAG_INIT_COMPLETE))
+		return -EAGAIN;
+
+	/* We do not support gigabit. */
+	if (cmd->autoneg == AUTONEG_ENABLE) {
+		if (cmd->advertising &
+		    (ADVERTISED_1000baseT_Half |
+		     ADVERTISED_1000baseT_Full))
+			return -EINVAL;
+	} else if ((cmd->speed != SPEED_100 &&
+		    cmd->speed != SPEED_10) ||
+		   (cmd->duplex != DUPLEX_HALF &&
+		    cmd->duplex != DUPLEX_FULL)) {
+			return -EINVAL;
+	}
+
+	spin_lock_irq(&bp->lock);
+
+	if (cmd->autoneg == AUTONEG_ENABLE) {
+		bp->flags &= ~B44_FLAG_FORCE_LINK;
+		bp->flags &= ~(B44_FLAG_ADV_10HALF |
+			       B44_FLAG_ADV_10FULL |
+			       B44_FLAG_ADV_100HALF |
+			       B44_FLAG_ADV_100FULL);
+		if (cmd->advertising & ADVERTISE_10HALF)
+			bp->flags |= B44_FLAG_ADV_10HALF;
+		if (cmd->advertising & ADVERTISE_10FULL)
+			bp->flags |= B44_FLAG_ADV_10FULL;
+		if (cmd->advertising & ADVERTISE_100HALF)
+			bp->flags |= B44_FLAG_ADV_100HALF;
+		if (cmd->advertising & ADVERTISE_100FULL)
+			bp->flags |= B44_FLAG_ADV_100FULL;
+	} else {
+		bp->flags |= B44_FLAG_FORCE_LINK;
+		if (cmd->speed == SPEED_100)
+			bp->flags |= B44_FLAG_100_BASE_T;
+		if (cmd->duplex == DUPLEX_FULL)
+			bp->flags |= B44_FLAG_FULL_DUPLEX;
+	}
+
+	b44_setup_phy(bp);
+
+	spin_unlock_irq(&bp->lock);
+
+	return 0;
+}
+
+static void b44_get_ringparam(struct net_device *dev,
+			      struct ethtool_ringparam *ering)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	ering->rx_max_pending = B44_RX_RING_SIZE - 1;
+	ering->rx_pending = bp->rx_pending;
+
+	/* XXX ethtool lacks a tx_max_pending, oops... */
+}
+
+static int b44_set_ringparam(struct net_device *dev,
+			     struct ethtool_ringparam *ering)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
+	    (ering->rx_mini_pending != 0) ||
+	    (ering->rx_jumbo_pending != 0) ||
+	    (ering->tx_pending > B44_TX_RING_SIZE - 1))
+		return -EINVAL;
+
+	spin_lock_irq(&bp->lock);
+
+	bp->rx_pending = ering->rx_pending;
+	bp->tx_pending = ering->tx_pending;
+
+	b44_halt(bp);
+	b44_init_rings(bp);
+	b44_init_hw(bp);
+	netif_wake_queue(bp->dev);
+	spin_unlock_irq(&bp->lock);
+
+	b44_enable_ints(bp);
+	
+	return 0;
+}
+
+static void b44_get_pauseparam(struct net_device *dev,
+				struct ethtool_pauseparam *epause)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	epause->autoneg =
+		(bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
+	epause->rx_pause =
+		(bp->flags & B44_FLAG_RX_PAUSE) != 0;
+	epause->tx_pause =
+		(bp->flags & B44_FLAG_TX_PAUSE) != 0;
+}
+
+static int b44_set_pauseparam(struct net_device *dev,
+				struct ethtool_pauseparam *epause)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	spin_lock_irq(&bp->lock);
+	if (epause->autoneg)
+		bp->flags |= B44_FLAG_PAUSE_AUTO;
+	else
+		bp->flags &= ~B44_FLAG_PAUSE_AUTO;
+	if (epause->rx_pause)
+		bp->flags |= B44_FLAG_RX_PAUSE;
+	else
+		bp->flags &= ~B44_FLAG_RX_PAUSE;
+	if (epause->tx_pause)
+		bp->flags |= B44_FLAG_TX_PAUSE;
+	else
+		bp->flags &= ~B44_FLAG_TX_PAUSE;
+	if (bp->flags & B44_FLAG_PAUSE_AUTO) {
+		b44_halt(bp);
+		b44_init_rings(bp);
+		b44_init_hw(bp);
+	} else {
+		__b44_set_flow_ctrl(bp, bp->flags);
+	}
+	spin_unlock_irq(&bp->lock);
+
+	b44_enable_ints(bp);
+	
+	return 0;
+}
+
+static struct ethtool_ops b44_ethtool_ops = {
+	.get_drvinfo		= b44_get_drvinfo,
+	.get_settings		= b44_get_settings,
+	.set_settings		= b44_set_settings,
+	.nway_reset		= b44_nway_reset,
+	.get_link		= ethtool_op_get_link,
+	.get_ringparam		= b44_get_ringparam,
+	.set_ringparam		= b44_set_ringparam,
+	.get_pauseparam		= b44_get_pauseparam,
+	.set_pauseparam		= b44_set_pauseparam,
+	.get_msglevel		= b44_get_msglevel,
+	.set_msglevel		= b44_set_msglevel,
+};
+
+static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+	struct mii_ioctl_data *data = if_mii(ifr);
+	struct b44 *bp = netdev_priv(dev);
+	int err;
+
+	spin_lock_irq(&bp->lock);
+	err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
+	spin_unlock_irq(&bp->lock);
+
+	return err;
+}
+
+/* Read 128-bytes of EEPROM. */
+static int b44_read_eeprom(struct b44 *bp, u8 *data)
+{
+	long i;
+	u16 *ptr = (u16 *) data;
+
+	for (i = 0; i < 128; i += 2)
+		ptr[i / 2] = readw(bp->regs + 4096 + i);
+
+	return 0;
+}
+
+static int __devinit b44_get_invariants(struct b44 *bp)
+{
+	u8 eeprom[128];
+	int err;
+
+	err = b44_read_eeprom(bp, &eeprom[0]);
+	if (err)
+		goto out;
+
+	bp->dev->dev_addr[0] = eeprom[79];
+	bp->dev->dev_addr[1] = eeprom[78];
+	bp->dev->dev_addr[2] = eeprom[81];
+	bp->dev->dev_addr[3] = eeprom[80];
+	bp->dev->dev_addr[4] = eeprom[83];
+	bp->dev->dev_addr[5] = eeprom[82];
+
+	bp->phy_addr = eeprom[90] & 0x1f;
+
+	/* With this, plus the rx_header prepended to the data by the
+	 * hardware, we'll land the ethernet header on a 2-byte boundary.
+	 */
+	bp->rx_offset = 30;
+
+	bp->imask = IMASK_DEF;
+
+	bp->core_unit = ssb_core_unit(bp);
+	bp->dma_offset = SB_PCI_DMA;
+
+	/* XXX - really required? 
+	   bp->flags |= B44_FLAG_BUGGY_TXPTR;
+         */
+out:
+	return err;
+}
+
+static int __devinit b44_init_one(struct pci_dev *pdev,
+				  const struct pci_device_id *ent)
+{
+	static int b44_version_printed = 0;
+	unsigned long b44reg_base, b44reg_len;
+	struct net_device *dev;
+	struct b44 *bp;
+	int err, i;
+
+	if (b44_version_printed++ == 0)
+		printk(KERN_INFO "%s", version);
+
+	err = pci_enable_device(pdev);
+	if (err) {
+		printk(KERN_ERR PFX "Cannot enable PCI device, "
+		       "aborting.\n");
+		return err;
+	}
+
+	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
+		printk(KERN_ERR PFX "Cannot find proper PCI device "
+		       "base address, aborting.\n");
+		err = -ENODEV;
+		goto err_out_disable_pdev;
+	}
+
+	err = pci_request_regions(pdev, DRV_MODULE_NAME);
+	if (err) {
+		printk(KERN_ERR PFX "Cannot obtain PCI resources, "
+		       "aborting.\n");
+		goto err_out_disable_pdev;
+	}
+
+	pci_set_master(pdev);
+
+	err = pci_set_dma_mask(pdev, (u64) B44_DMA_MASK);
+	if (err) {
+		printk(KERN_ERR PFX "No usable DMA configuration, "
+		       "aborting.\n");
+		goto err_out_free_res;
+	}
+	
+	err = pci_set_consistent_dma_mask(pdev, (u64) B44_DMA_MASK);
+	if (err) {
+	  printk(KERN_ERR PFX "No usable DMA configuration, "
+		 "aborting.\n");
+	  goto err_out_free_res;
+	}
+
+	b44reg_base = pci_resource_start(pdev, 0);
+	b44reg_len = pci_resource_len(pdev, 0);
+
+	dev = alloc_etherdev(sizeof(*bp));
+	if (!dev) {
+		printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
+		err = -ENOMEM;
+		goto err_out_free_res;
+	}
+
+	SET_MODULE_OWNER(dev);
+	SET_NETDEV_DEV(dev,&pdev->dev);
+
+	/* No interesting netdevice features in this card... */
+	dev->features |= 0;
+
+	bp = netdev_priv(dev);
+	bp->pdev = pdev;
+	bp->dev = dev;
+	if (b44_debug >= 0)
+		bp->msg_enable = (1 << b44_debug) - 1;
+	else
+		bp->msg_enable = B44_DEF_MSG_ENABLE;
+
+	spin_lock_init(&bp->lock);
+
+	bp->regs = ioremap(b44reg_base, b44reg_len);
+	if (bp->regs == 0UL) {
+		printk(KERN_ERR PFX "Cannot map device registers, "
+		       "aborting.\n");
+		err = -ENOMEM;
+		goto err_out_free_dev;
+	}
+
+	bp->rx_pending = B44_DEF_RX_RING_PENDING;
+	bp->tx_pending = B44_DEF_TX_RING_PENDING;
+
+	dev->open = b44_open;
+	dev->stop = b44_close;
+	dev->hard_start_xmit = b44_start_xmit;
+	dev->get_stats = b44_get_stats;
+	dev->set_multicast_list = b44_set_rx_mode;
+	dev->set_mac_address = b44_set_mac_addr;
+	dev->do_ioctl = b44_ioctl;
+	dev->tx_timeout = b44_tx_timeout;
+	dev->poll = b44_poll;
+	dev->weight = 64;
+	dev->watchdog_timeo = B44_TX_TIMEOUT;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	dev->poll_controller = b44_poll_controller;
+#endif
+	dev->change_mtu = b44_change_mtu;
+	dev->irq = pdev->irq;
+	SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
+
+	err = b44_get_invariants(bp);
+	if (err) {
+		printk(KERN_ERR PFX "Problem fetching invariants of chip, "
+		       "aborting.\n");
+		goto err_out_iounmap;
+	}
+
+	bp->mii_if.dev = dev;
+	bp->mii_if.mdio_read = b44_mii_read;
+	bp->mii_if.mdio_write = b44_mii_write;
+	bp->mii_if.phy_id = bp->phy_addr;
+	bp->mii_if.phy_id_mask = 0x1f;
+	bp->mii_if.reg_num_mask = 0x1f;
+
+	/* By default, advertise all speed/duplex settings. */
+	bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
+		      B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
+
+	/* By default, auto-negotiate PAUSE. */
+	bp->flags |= B44_FLAG_PAUSE_AUTO;
+
+	err = register_netdev(dev);
+	if (err) {
+		printk(KERN_ERR PFX "Cannot register net device, "
+		       "aborting.\n");
+		goto err_out_iounmap;
+	}
+
+	pci_set_drvdata(pdev, dev);
+
+	pci_save_state(bp->pdev);
+
+	printk(KERN_INFO "%s: Broadcom 4400 10/100BaseT Ethernet ", dev->name);
+	for (i = 0; i < 6; i++)
+		printk("%2.2x%c", dev->dev_addr[i],
+		       i == 5 ? '\n' : ':');
+
+	return 0;
+
+err_out_iounmap:
+	iounmap(bp->regs);
+
+err_out_free_dev:
+	free_netdev(dev);
+
+err_out_free_res:
+	pci_release_regions(pdev);
+
+err_out_disable_pdev:
+	pci_disable_device(pdev);
+	pci_set_drvdata(pdev, NULL);
+	return err;
+}
+
+static void __devexit b44_remove_one(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+
+	if (dev) {
+		struct b44 *bp = netdev_priv(dev);
+
+		unregister_netdev(dev);
+		iounmap(bp->regs);
+		free_netdev(dev);
+		pci_release_regions(pdev);
+		pci_disable_device(pdev);
+		pci_set_drvdata(pdev, NULL);
+	}
+}
+
+static int b44_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct b44 *bp = netdev_priv(dev);
+
+        if (!netif_running(dev))
+                 return 0;
+
+	del_timer_sync(&bp->timer);
+
+	spin_lock_irq(&bp->lock); 
+
+	b44_halt(bp);
+	netif_carrier_off(bp->dev); 
+	netif_device_detach(bp->dev);
+	b44_free_rings(bp);
+
+	spin_unlock_irq(&bp->lock);
+	return 0;
+}
+
+static int b44_resume(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct b44 *bp = netdev_priv(dev);
+
+	pci_restore_state(pdev);
+
+	if (!netif_running(dev))
+		return 0;
+
+	spin_lock_irq(&bp->lock);
+
+	b44_init_rings(bp);
+	b44_init_hw(bp);
+	netif_device_attach(bp->dev);
+	spin_unlock_irq(&bp->lock);
+
+	bp->timer.expires = jiffies + HZ;
+	add_timer(&bp->timer);
+
+	b44_enable_ints(bp);
+	return 0;
+}
+
+static struct pci_driver b44_driver = {
+	.name		= DRV_MODULE_NAME,
+	.id_table	= b44_pci_tbl,
+	.probe		= b44_init_one,
+	.remove		= __devexit_p(b44_remove_one),
+        .suspend        = b44_suspend,
+        .resume         = b44_resume,
+};
+
+static int __init b44_init(void)
+{
+	return pci_module_init(&b44_driver);
+}
+
+static void __exit b44_cleanup(void)
+{
+	pci_unregister_driver(&b44_driver);
+}
+
+module_init(b44_init);
+module_exit(b44_cleanup);
+