broadcom: Move the Broadcom drivers

Moves the drivers for Broadcom devices into
drivers/net/ethernet/broadcom/ and the necessary Kconfig and Makefile
changes.

CC: Eilon Greenstein <eilong@broadcom.com>
CC: Michael Chan <mchan@broadcom.com>
CC: Matt Carlson <mcarlson@broadcom.com>
CC: Gary Zambrano <zambrano@broadcom.com>
CC: "Maciej W. Rozycki" <macro@linux-mips.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 2374 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/b44.c b/drivers/net/ethernet/broadcom/b44.c
new file mode 100644
index 000000000000..41ea84e3f69c
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/b44.c
@@ -0,0 +1,2374 @@
+/* b44.c: Broadcom 44xx/47xx Fast Ethernet device driver.
+ *
+ * Copyright (C) 2002 David S. Miller (davem@redhat.com)
+ * Copyright (C) 2004 Pekka Pietikainen (pp@ee.oulu.fi)
+ * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
+ * Copyright (C) 2006 Felix Fietkau (nbd@openwrt.org)
+ * Copyright (C) 2006 Broadcom Corporation.
+ * Copyright (C) 2007 Michael Buesch <m@bues.ch>
+ *
+ * Distribute under GPL.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#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/if_vlan.h>
+#include <linux/etherdevice.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/ssb/ssb.h>
+#include <linux/slab.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+
+#include "b44.h"
+
+#define DRV_MODULE_NAME		"b44"
+#define DRV_MODULE_VERSION	"2.0"
+#define DRV_DESCRIPTION		"Broadcom 44xx/47xx 10/100 PCI ethernet driver"
+
+#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 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_OFFSET		(RX_HEADER_LEN + 2)
+#define RX_PKT_BUF_SZ		(1536 + RX_PKT_OFFSET)
+
+/* minimum number of free TX descriptors required to wake up TX process */
+#define B44_TX_WAKEUP_THRESH		(B44_TX_RING_SIZE / 4)
+
+/* b44 internal pattern match filter info */
+#define B44_PATTERN_BASE	0x400
+#define B44_PATTERN_SIZE	0x80
+#define B44_PMASK_BASE		0x600
+#define B44_PMASK_SIZE		0x10
+#define B44_MAX_PATTERNS	16
+#define B44_ETHIPV6UDP_HLEN	62
+#define B44_ETHIPV4UDP_HLEN	42
+
+MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller");
+MODULE_DESCRIPTION(DRV_DESCRIPTION);
+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");
+
+
+#ifdef CONFIG_B44_PCI
+static DEFINE_PCI_DEVICE_TABLE(b44_pci_tbl) = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) },
+	{ 0 } /* terminate list with empty entry */
+};
+MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
+
+static struct pci_driver b44_pci_driver = {
+	.name		= DRV_MODULE_NAME,
+	.id_table	= b44_pci_tbl,
+};
+#endif /* CONFIG_B44_PCI */
+
+static const struct ssb_device_id b44_ssb_tbl[] = {
+	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV),
+	SSB_DEVTABLE_END
+};
+MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl);
+
+static void b44_halt(struct b44 *);
+static void b44_init_rings(struct b44 *);
+
+#define B44_FULL_RESET		1
+#define B44_FULL_RESET_SKIP_PHY	2
+#define B44_PARTIAL_RESET	3
+#define B44_CHIP_RESET_FULL	4
+#define B44_CHIP_RESET_PARTIAL	5
+
+static void b44_init_hw(struct b44 *, int);
+
+static int dma_desc_sync_size;
+static int instance;
+
+static const char b44_gstrings[][ETH_GSTRING_LEN] = {
+#define _B44(x...)	# x,
+B44_STAT_REG_DECLARE
+#undef _B44
+};
+
+static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev,
+						dma_addr_t dma_base,
+						unsigned long offset,
+						enum dma_data_direction dir)
+{
+	dma_sync_single_for_device(sdev->dma_dev, dma_base + offset,
+				   dma_desc_sync_size, dir);
+}
+
+static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
+					     dma_addr_t dma_base,
+					     unsigned long offset,
+					     enum dma_data_direction dir)
+{
+	dma_sync_single_for_cpu(sdev->dma_dev, dma_base + offset,
+				dma_desc_sync_size, dir);
+}
+
+static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
+{
+	return ssb_read32(bp->sdev, reg);
+}
+
+static inline void bw32(const struct b44 *bp,
+			unsigned long reg, unsigned long val)
+{
+	ssb_write32(bp->sdev, reg, val);
+}
+
+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) {
+		if (net_ratelimit())
+			netdev_err(bp->dev, "BUG!  Timeout waiting for bit %08x of register %lx to %s\n",
+				   bit, reg, clear ? "clear" : "set");
+
+		return -ENODEV;
+	}
+	return 0;
+}
+
+static inline void __b44_cam_read(struct b44 *bp, unsigned char *data, int index)
+{
+	u32 val;
+
+	bw32(bp, B44_CAM_CTRL, (CAM_CTRL_READ |
+			    (index << CAM_CTRL_INDEX_SHIFT)));
+
+	b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
+
+	val = br32(bp, B44_CAM_DATA_LO);
+
+	data[2] = (val >> 24) & 0xFF;
+	data[3] = (val >> 16) & 0xFF;
+	data[4] = (val >> 8) & 0xFF;
+	data[5] = (val >> 0) & 0xFF;
+
+	val = br32(bp, B44_CAM_DATA_HI);
+
+	data[0] = (val >> 8) & 0xFF;
+	data[1] = (val >> 0) & 0xFF;
+}
+
+static inline 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 phy_addr, 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) |
+			     (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 phy_addr, 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) |
+			     (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);
+}
+
+static inline int b44_readphy(struct b44 *bp, int reg, u32 *val)
+{
+	if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
+		return 0;
+
+	return __b44_readphy(bp, bp->phy_addr, reg, val);
+}
+
+static inline int b44_writephy(struct b44 *bp, int reg, u32 val)
+{
+	if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
+		return 0;
+
+	return __b44_writephy(bp, bp->phy_addr, reg, val);
+}
+
+/* miilib interface */
+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, phy_id, 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, phy_id, location, val);
+}
+
+static int b44_phy_reset(struct b44 *bp)
+{
+	u32 val;
+	int err;
+
+	if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
+		return 0;
+	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) {
+			netdev_err(bp->dev, "PHY Reset would not complete\n");
+			err = -ENODEV;
+		}
+	}
+
+	return err;
+}
+
+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 = 0;
+
+	/* The driver supports only rx pause by default because
+	   the b44 mac tx pause mechanism generates excessive
+	   pause frames.
+	   Use ethtool to turn on b44 tx pause if necessary.
+	 */
+	if ((local & ADVERTISE_PAUSE_CAP) &&
+	    (local & ADVERTISE_PAUSE_ASYM)){
+		if ((remote & LPA_PAUSE_ASYM) &&
+		    !(remote & LPA_PAUSE_CAP))
+			pause_enab |= B44_FLAG_RX_PAUSE;
+	}
+
+	__b44_set_flow_ctrl(bp, pause_enab);
+}
+
+#ifdef CONFIG_BCM47XX
+#include <asm/mach-bcm47xx/nvram.h>
+static void b44_wap54g10_workaround(struct b44 *bp)
+{
+	char buf[20];
+	u32 val;
+	int err;
+
+	/*
+	 * workaround for bad hardware design in Linksys WAP54G v1.0
+	 * see https://dev.openwrt.org/ticket/146
+	 * check and reset bit "isolate"
+	 */
+	if (nvram_getenv("boardnum", buf, sizeof(buf)) < 0)
+		return;
+	if (simple_strtoul(buf, NULL, 0) == 2) {
+		err = __b44_readphy(bp, 0, MII_BMCR, &val);
+		if (err)
+			goto error;
+		if (!(val & BMCR_ISOLATE))
+			return;
+		val &= ~BMCR_ISOLATE;
+		err = __b44_writephy(bp, 0, MII_BMCR, val);
+		if (err)
+			goto error;
+	}
+	return;
+error:
+	pr_warning("PHY: cannot reset MII transceiver isolate bit\n");
+}
+#else
+static inline void b44_wap54g10_workaround(struct b44 *bp)
+{
+}
+#endif
+
+static int b44_setup_phy(struct b44 *bp)
+{
+	u32 val;
+	int err;
+
+	b44_wap54g10_workaround(bp);
+
+	if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
+		return 0;
+	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);
+	}
+
+	/* Pad */
+	reg += 8*4UL;
+
+	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)) {
+		netdev_info(bp->dev, "Link is down\n");
+	} else {
+		netdev_info(bp->dev, "Link is up at %d Mbps, %s duplex\n",
+			    (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
+			    (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
+
+		netdev_info(bp->dev, "Flow control is %s for TX and %s for RX\n",
+			    (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 (bp->phy_addr == B44_PHY_ADDR_NO_PHY) {
+		bp->flags |= B44_FLAG_100_BASE_T;
+		bp->flags |= B44_FLAG_FULL_DUPLEX;
+		if (!netif_carrier_ok(bp->dev)) {
+			u32 val = br32(bp, B44_TX_CTRL);
+			val |= TX_CTRL_DUPLEX;
+			bw32(bp, B44_TX_CTRL, val);
+			netif_carrier_on(bp->dev);
+			b44_link_report(bp);
+		}
+		return;
+	}
+
+	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)
+			netdev_warn(bp->dev, "Remote fault detected in PHY\n");
+		if (bmsr & BMSR_JCD)
+			netdev_warn(bp->dev, "Jabber detected in PHY\n");
+	}
+}
+
+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);
+
+	mod_timer(&bp->timer, round_jiffies(jiffies + HZ));
+}
+
+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;
+
+		BUG_ON(skb == NULL);
+
+		dma_unmap_single(bp->sdev->dma_dev,
+				 rp->mapping,
+				 skb->len,
+				 DMA_TO_DEVICE);
+		rp->skb = NULL;
+		dev_kfree_skb(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 = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ);
+	if (skb == NULL)
+		return -ENOMEM;
+
+	mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
+				 RX_PKT_BUF_SZ,
+				 DMA_FROM_DEVICE);
+
+	/* Hardware bug work-around, the chip is unable to do PCI DMA
+	   to/from anything above 1GB :-( */
+	if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
+		mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
+		/* Sigh... */
+		if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
+			dma_unmap_single(bp->sdev->dma_dev, mapping,
+					     RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
+		dev_kfree_skb_any(skb);
+		skb = __netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA);
+		if (skb == NULL)
+			return -ENOMEM;
+		mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
+					 RX_PKT_BUF_SZ,
+					 DMA_FROM_DEVICE);
+		if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
+		    mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
+			if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
+				dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
+			dev_kfree_skb_any(skb);
+			return -ENOMEM;
+		}
+		bp->force_copybreak = 1;
+	}
+
+	rh = (struct rx_header *) skb->data;
+
+	rh->len = 0;
+	rh->flags = 0;
+
+	map->skb = skb;
+	map->mapping = mapping;
+
+	if (src_map != NULL)
+		src_map->skb = NULL;
+
+	ctrl = (DESC_CTRL_LEN & RX_PKT_BUF_SZ);
+	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->dma_offset);
+
+	if (bp->flags & B44_FLAG_RX_RING_HACK)
+		b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
+			                    dest_idx * sizeof(*dp),
+			                    DMA_BIDIRECTIONAL);
+
+	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;
+	__le32 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;
+	dest_map->mapping = src_map->mapping;
+
+	if (bp->flags & B44_FLAG_RX_RING_HACK)
+		b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma,
+			                 src_idx * sizeof(*src_desc),
+			                 DMA_BIDIRECTIONAL);
+
+	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;
+
+	if (bp->flags & B44_FLAG_RX_RING_HACK)
+		b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
+					     dest_idx * sizeof(*dest_desc),
+					     DMA_BIDIRECTIONAL);
+
+	dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping,
+				   RX_PKT_BUF_SZ,
+				   DMA_FROM_DEVICE);
+}
+
+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 = rp->mapping;
+		struct rx_header *rh;
+		u16 len;
+
+		dma_sync_single_for_cpu(bp->sdev->dma_dev, map,
+					RX_PKT_BUF_SZ,
+					DMA_FROM_DEVICE);
+		rh = (struct rx_header *) skb->data;
+		len = le16_to_cpu(rh->len);
+		if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
+		    (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
+		drop_it:
+			b44_recycle_rx(bp, cons, bp->rx_prod);
+		drop_it_no_recycle:
+			bp->dev->stats.rx_dropped++;
+			goto next_pkt;
+		}
+
+		if (len == 0) {
+			int i = 0;
+
+			do {
+				udelay(2);
+				barrier();
+				len = le16_to_cpu(rh->len);
+			} while (len == 0 && i++ < 5);
+			if (len == 0)
+				goto drop_it;
+		}
+
+		/* Omit CRC. */
+		len -= 4;
+
+		if (!bp->force_copybreak && 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;
+			dma_unmap_single(bp->sdev->dma_dev, map,
+					 skb_size, DMA_FROM_DEVICE);
+			/* Leave out rx_header */
+			skb_put(skb, len + RX_PKT_OFFSET);
+			skb_pull(skb, RX_PKT_OFFSET);
+		} else {
+			struct sk_buff *copy_skb;
+
+			b44_recycle_rx(bp, cons, bp->rx_prod);
+			copy_skb = netdev_alloc_skb(bp->dev, len + 2);
+			if (copy_skb == NULL)
+				goto drop_it_no_recycle;
+
+			skb_reserve(copy_skb, 2);
+			skb_put(copy_skb, len);
+			/* DMA sync done above, copy just the actual packet */
+			skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET,
+							 copy_skb->data, len);
+			skb = copy_skb;
+		}
+		skb_checksum_none_assert(skb);
+		skb->protocol = eth_type_trans(skb, bp->dev);
+		netif_receive_skb(skb);
+		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 napi_struct *napi, int budget)
+{
+	struct b44 *bp = container_of(napi, struct b44, napi);
+	int work_done;
+	unsigned long flags;
+
+	spin_lock_irqsave(&bp->lock, flags);
+
+	if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
+		/* spin_lock(&bp->tx_lock); */
+		b44_tx(bp);
+		/* spin_unlock(&bp->tx_lock); */
+	}
+	if (bp->istat & ISTAT_RFO) {	/* fast recovery, in ~20msec */
+		bp->istat &= ~ISTAT_RFO;
+		b44_disable_ints(bp);
+		ssb_device_enable(bp->sdev, 0); /* resets ISTAT_RFO */
+		b44_init_rings(bp);
+		b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
+		netif_wake_queue(bp->dev);
+	}
+
+	spin_unlock_irqrestore(&bp->lock, flags);
+
+	work_done = 0;
+	if (bp->istat & ISTAT_RX)
+		work_done += b44_rx(bp, budget);
+
+	if (bp->istat & ISTAT_ERRORS) {
+		spin_lock_irqsave(&bp->lock, flags);
+		b44_halt(bp);
+		b44_init_rings(bp);
+		b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
+		netif_wake_queue(bp->dev);
+		spin_unlock_irqrestore(&bp->lock, flags);
+		work_done = 0;
+	}
+
+	if (work_done < budget) {
+		napi_complete(napi);
+		b44_enable_ints(bp);
+	}
+
+	return work_done;
+}
+
+static irqreturn_t b44_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct b44 *bp = netdev_priv(dev);
+	u32 istat, imask;
+	int handled = 0;
+
+	spin_lock(&bp->lock);
+
+	istat = br32(bp, B44_ISTAT);
+	imask = br32(bp, B44_IMASK);
+
+	/* The interrupt mask register controls which interrupt bits
+	 * will actually raise an interrupt to the CPU when set by hw/firmware,
+	 * but doesn't mask off the bits.
+	 */
+	istat &= imask;
+	if (istat) {
+		handled = 1;
+
+		if (unlikely(!netif_running(dev))) {
+			netdev_info(dev, "late interrupt\n");
+			goto irq_ack;
+		}
+
+		if (napi_schedule_prep(&bp->napi)) {
+			/* NOTE: These writes are posted by the readback of
+			 *       the ISTAT register below.
+			 */
+			bp->istat = istat;
+			__b44_disable_ints(bp);
+			__napi_schedule(&bp->napi);
+		}
+
+irq_ack:
+		bw32(bp, B44_ISTAT, istat);
+		br32(bp, B44_ISTAT);
+	}
+	spin_unlock(&bp->lock);
+	return IRQ_RETVAL(handled);
+}
+
+static void b44_tx_timeout(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	netdev_err(dev, "transmit timed out, resetting\n");
+
+	spin_lock_irq(&bp->lock);
+
+	b44_halt(bp);
+	b44_init_rings(bp);
+	b44_init_hw(bp, B44_FULL_RESET);
+
+	spin_unlock_irq(&bp->lock);
+
+	b44_enable_ints(bp);
+
+	netif_wake_queue(dev);
+}
+
+static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+	int rc = NETDEV_TX_OK;
+	dma_addr_t mapping;
+	u32 len, entry, ctrl;
+	unsigned long flags;
+
+	len = skb->len;
+	spin_lock_irqsave(&bp->lock, flags);
+
+	/* This is a hard error, log it. */
+	if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
+		netif_stop_queue(dev);
+		netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
+		goto err_out;
+	}
+
+	mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE);
+	if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
+		struct sk_buff *bounce_skb;
+
+		/* Chip can't handle DMA to/from >1GB, use bounce buffer */
+		if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
+			dma_unmap_single(bp->sdev->dma_dev, mapping, len,
+					     DMA_TO_DEVICE);
+
+		bounce_skb = __netdev_alloc_skb(dev, len, GFP_ATOMIC | GFP_DMA);
+		if (!bounce_skb)
+			goto err_out;
+
+		mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data,
+					 len, DMA_TO_DEVICE);
+		if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
+			if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
+				dma_unmap_single(bp->sdev->dma_dev, mapping,
+						     len, DMA_TO_DEVICE);
+			dev_kfree_skb_any(bounce_skb);
+			goto err_out;
+		}
+
+		skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
+		dev_kfree_skb_any(skb);
+		skb = bounce_skb;
+	}
+
+	entry = bp->tx_prod;
+	bp->tx_buffers[entry].skb = skb;
+	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);
+
+	if (bp->flags & B44_FLAG_TX_RING_HACK)
+		b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
+			                    entry * sizeof(bp->tx_ring[0]),
+			                    DMA_TO_DEVICE);
+
+	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);
+
+out_unlock:
+	spin_unlock_irqrestore(&bp->lock, flags);
+
+	return rc;
+
+err_out:
+	rc = NETDEV_TX_BUSY;
+	goto out_unlock;
+}
+
+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, B44_FULL_RESET);
+	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;
+		dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ,
+				 DMA_FROM_DEVICE);
+		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;
+		dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len,
+				 DMA_TO_DEVICE);
+		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.
+ */
+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);
+
+	if (bp->flags & B44_FLAG_RX_RING_HACK)
+		dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma,
+					   DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
+
+	if (bp->flags & B44_FLAG_TX_RING_HACK)
+		dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma,
+					   DMA_TABLE_BYTES, DMA_TO_DEVICE);
+
+	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)
+{
+	kfree(bp->rx_buffers);
+	bp->rx_buffers = NULL;
+	kfree(bp->tx_buffers);
+	bp->tx_buffers = NULL;
+	if (bp->rx_ring) {
+		if (bp->flags & B44_FLAG_RX_RING_HACK) {
+			dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma,
+					 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
+			kfree(bp->rx_ring);
+		} else
+			dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
+					  bp->rx_ring, bp->rx_ring_dma);
+		bp->rx_ring = NULL;
+		bp->flags &= ~B44_FLAG_RX_RING_HACK;
+	}
+	if (bp->tx_ring) {
+		if (bp->flags & B44_FLAG_TX_RING_HACK) {
+			dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma,
+					 DMA_TABLE_BYTES, DMA_TO_DEVICE);
+			kfree(bp->tx_ring);
+		} else
+			dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
+					  bp->tx_ring, bp->tx_ring_dma);
+		bp->tx_ring = NULL;
+		bp->flags &= ~B44_FLAG_TX_RING_HACK;
+	}
+}
+
+/*
+ * Must not be invoked with interrupt sources disabled and
+ * the hardware shutdown down.  Can sleep.
+ */
+static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
+{
+	int size;
+
+	size  = B44_RX_RING_SIZE * sizeof(struct ring_info);
+	bp->rx_buffers = kzalloc(size, gfp);
+	if (!bp->rx_buffers)
+		goto out_err;
+
+	size = B44_TX_RING_SIZE * sizeof(struct ring_info);
+	bp->tx_buffers = kzalloc(size, gfp);
+	if (!bp->tx_buffers)
+		goto out_err;
+
+	size = DMA_TABLE_BYTES;
+	bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
+					 &bp->rx_ring_dma, gfp);
+	if (!bp->rx_ring) {
+		/* Allocation may have failed due to pci_alloc_consistent
+		   insisting on use of GFP_DMA, which is more restrictive
+		   than necessary...  */
+		struct dma_desc *rx_ring;
+		dma_addr_t rx_ring_dma;
+
+		rx_ring = kzalloc(size, gfp);
+		if (!rx_ring)
+			goto out_err;
+
+		rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring,
+					     DMA_TABLE_BYTES,
+					     DMA_BIDIRECTIONAL);
+
+		if (dma_mapping_error(bp->sdev->dma_dev, rx_ring_dma) ||
+			rx_ring_dma + size > DMA_BIT_MASK(30)) {
+			kfree(rx_ring);
+			goto out_err;
+		}
+
+		bp->rx_ring = rx_ring;
+		bp->rx_ring_dma = rx_ring_dma;
+		bp->flags |= B44_FLAG_RX_RING_HACK;
+	}
+
+	bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
+					 &bp->tx_ring_dma, gfp);
+	if (!bp->tx_ring) {
+		/* Allocation may have failed due to ssb_dma_alloc_consistent
+		   insisting on use of GFP_DMA, which is more restrictive
+		   than necessary...  */
+		struct dma_desc *tx_ring;
+		dma_addr_t tx_ring_dma;
+
+		tx_ring = kzalloc(size, gfp);
+		if (!tx_ring)
+			goto out_err;
+
+		tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring,
+					     DMA_TABLE_BYTES,
+					     DMA_TO_DEVICE);
+
+		if (dma_mapping_error(bp->sdev->dma_dev, tx_ring_dma) ||
+			tx_ring_dma + size > DMA_BIT_MASK(30)) {
+			kfree(tx_ring);
+			goto out_err;
+		}
+
+		bp->tx_ring = tx_ring;
+		bp->tx_ring_dma = tx_ring_dma;
+		bp->flags |= B44_FLAG_TX_RING_HACK;
+	}
+
+	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, int reset_kind)
+{
+	struct ssb_device *sdev = bp->sdev;
+	bool was_enabled;
+
+	was_enabled = ssb_device_is_enabled(bp->sdev);
+
+	ssb_device_enable(bp->sdev, 0);
+	ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
+
+	if (was_enabled) {
+		bw32(bp, B44_RCV_LAZY, 0);
+		bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
+		b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 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;
+	}
+
+	b44_clear_stats(bp);
+
+	/*
+	 * Don't enable PHY if we are doing a partial reset
+	 * we are probably going to power down
+	 */
+	if (reset_kind == B44_CHIP_RESET_PARTIAL)
+		return;
+
+	switch (sdev->bus->bustype) {
+	case SSB_BUSTYPE_SSB:
+		bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
+		     (DIV_ROUND_CLOSEST(ssb_clockspeed(sdev->bus),
+					B44_MDC_RATIO)
+		     & MDIO_CTRL_MAXF_MASK)));
+		break;
+	case SSB_BUSTYPE_PCI:
+		bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
+		     (0x0d & MDIO_CTRL_MAXF_MASK)));
+		break;
+	case SSB_BUSTYPE_PCMCIA:
+	case SSB_BUSTYPE_SDIO:
+		WARN_ON(1); /* A device with this bus does not exist. */
+		break;
+	}
+
+	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);
+	/* reset PHY */
+	b44_phy_reset(bp);
+	/* power down PHY */
+	netdev_info(bp->dev, "powering down PHY\n");
+	bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
+	/* now reset the chip, but without enabling the MAC&PHY
+	 * part of it. This has to be done _after_ we shut down the PHY */
+	b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
+}
+
+/* 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;
+	u32 val;
+
+	if (netif_running(dev))
+		return -EBUSY;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EINVAL;
+
+	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
+
+	spin_lock_irq(&bp->lock);
+
+	val = br32(bp, B44_RXCONFIG);
+	if (!(val & RXCONFIG_CAM_ABSENT))
+		__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, int reset_kind)
+{
+	u32 val;
+
+	b44_chip_reset(bp, B44_CHIP_RESET_FULL);
+	if (reset_kind == B44_FULL_RESET) {
+		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 */
+	if (reset_kind == B44_PARTIAL_RESET) {
+		bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
+				      (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
+	} else {
+		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 |
+				      (RX_PKT_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, GFP_KERNEL);
+	if (err)
+		goto out;
+
+	napi_enable(&bp->napi);
+
+	b44_init_rings(bp);
+	b44_init_hw(bp, B44_FULL_RESET);
+
+	b44_check_phy(bp);
+
+	err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
+	if (unlikely(err < 0)) {
+		napi_disable(&bp->napi);
+		b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
+		b44_free_rings(bp);
+		b44_free_consistent(bp);
+		goto out;
+	}
+
+	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);
+	netif_start_queue(dev);
+out:
+	return err;
+}
+
+#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);
+	enable_irq(dev->irq);
+}
+#endif
+
+static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
+{
+	u32 i;
+	u32 *pattern = (u32 *) pp;
+
+	for (i = 0; i < bytes; i += sizeof(u32)) {
+		bw32(bp, B44_FILT_ADDR, table_offset + i);
+		bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
+	}
+}
+
+static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
+{
+	int magicsync = 6;
+	int k, j, len = offset;
+	int ethaddr_bytes = ETH_ALEN;
+
+	memset(ppattern + offset, 0xff, magicsync);
+	for (j = 0; j < magicsync; j++)
+		set_bit(len++, (unsigned long *) pmask);
+
+	for (j = 0; j < B44_MAX_PATTERNS; j++) {
+		if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
+			ethaddr_bytes = ETH_ALEN;
+		else
+			ethaddr_bytes = B44_PATTERN_SIZE - len;
+		if (ethaddr_bytes <=0)
+			break;
+		for (k = 0; k< ethaddr_bytes; k++) {
+			ppattern[offset + magicsync +
+				(j * ETH_ALEN) + k] = macaddr[k];
+			set_bit(len++, (unsigned long *) pmask);
+		}
+	}
+	return len - 1;
+}
+
+/* Setup magic packet patterns in the b44 WOL
+ * pattern matching filter.
+ */
+static void b44_setup_pseudo_magicp(struct b44 *bp)
+{
+
+	u32 val;
+	int plen0, plen1, plen2;
+	u8 *pwol_pattern;
+	u8 pwol_mask[B44_PMASK_SIZE];
+
+	pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
+	if (!pwol_pattern) {
+		pr_err("Memory not available for WOL\n");
+		return;
+	}
+
+	/* Ipv4 magic packet pattern - pattern 0.*/
+	memset(pwol_mask, 0, B44_PMASK_SIZE);
+	plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
+				  B44_ETHIPV4UDP_HLEN);
+
+   	bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
+   	bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
+
+	/* Raw ethernet II magic packet pattern - pattern 1 */
+	memset(pwol_pattern, 0, B44_PATTERN_SIZE);
+	memset(pwol_mask, 0, B44_PMASK_SIZE);
+	plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
+				  ETH_HLEN);
+
+   	bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
+		       B44_PATTERN_BASE + B44_PATTERN_SIZE);
+  	bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
+		       B44_PMASK_BASE + B44_PMASK_SIZE);
+
+	/* Ipv6 magic packet pattern - pattern 2 */
+	memset(pwol_pattern, 0, B44_PATTERN_SIZE);
+	memset(pwol_mask, 0, B44_PMASK_SIZE);
+	plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
+				  B44_ETHIPV6UDP_HLEN);
+
+   	bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
+		       B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
+  	bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
+		       B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
+
+	kfree(pwol_pattern);
+
+	/* set these pattern's lengths: one less than each real length */
+	val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
+	bw32(bp, B44_WKUP_LEN, val);
+
+	/* enable wakeup pattern matching */
+	val = br32(bp, B44_DEVCTRL);
+	bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
+
+}
+
+#ifdef CONFIG_B44_PCI
+static void b44_setup_wol_pci(struct b44 *bp)
+{
+	u16 val;
+
+	if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
+		bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
+		pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
+		pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
+	}
+}
+#else
+static inline void b44_setup_wol_pci(struct b44 *bp) { }
+#endif /* CONFIG_B44_PCI */
+
+static void b44_setup_wol(struct b44 *bp)
+{
+	u32 val;
+
+	bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
+
+	if (bp->flags & B44_FLAG_B0_ANDLATER) {
+
+		bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
+
+		val = bp->dev->dev_addr[2] << 24 |
+			bp->dev->dev_addr[3] << 16 |
+			bp->dev->dev_addr[4] << 8 |
+			bp->dev->dev_addr[5];
+		bw32(bp, B44_ADDR_LO, val);
+
+		val = bp->dev->dev_addr[0] << 8 |
+			bp->dev->dev_addr[1];
+		bw32(bp, B44_ADDR_HI, val);
+
+		val = br32(bp, B44_DEVCTRL);
+		bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
+
+ 	} else {
+ 		b44_setup_pseudo_magicp(bp);
+ 	}
+	b44_setup_wol_pci(bp);
+}
+
+static int b44_close(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	netif_stop_queue(dev);
+
+	napi_disable(&bp->napi);
+
+	del_timer_sync(&bp->timer);
+
+	spin_lock_irq(&bp->lock);
+
+	b44_halt(bp);
+	b44_free_rings(bp);
+	netif_carrier_off(dev);
+
+	spin_unlock_irq(&bp->lock);
+
+	free_irq(dev->irq, dev);
+
+	if (bp->flags & B44_FLAG_WOL_ENABLE) {
+		b44_init_hw(bp, B44_PARTIAL_RESET);
+		b44_setup_wol(bp);
+	}
+
+	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 = &dev->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 netdev_hw_addr *ha;
+	int i, num_ents;
+
+	num_ents = min_t(int, netdev_mc_count(dev), B44_MCAST_TABLE_SIZE);
+	i = 0;
+	netdev_for_each_mc_addr(ha, dev) {
+		if (i == num_ents)
+			break;
+		__b44_cam_write(bp, ha->addr, i++ + 1);
+	}
+	return i+1;
+}
+
+static void __b44_set_rx_mode(struct net_device *dev)
+{
+	struct b44 *bp = netdev_priv(dev);
+	u32 val;
+
+	val = br32(bp, B44_RXCONFIG);
+	val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
+	if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
+		val |= RXCONFIG_PROMISC;
+		bw32(bp, B44_RXCONFIG, val);
+	} else {
+		unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
+		int i = 1;
+
+		__b44_set_mac_addr(bp);
+
+		if ((dev->flags & IFF_ALLMULTI) ||
+		    (netdev_mc_count(dev) > B44_MCAST_TABLE_SIZE))
+			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 ssb_bus *bus = bp->sdev->bus;
+
+	strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
+	strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
+	switch (bus->bustype) {
+	case SSB_BUSTYPE_PCI:
+		strlcpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
+		break;
+	case SSB_BUSTYPE_SSB:
+		strlcpy(info->bus_info, "SSB", sizeof(info->bus_info));
+		break;
+	case SSB_BUSTYPE_PCMCIA:
+	case SSB_BUSTYPE_SDIO:
+		WARN_ON(1); /* A device with this bus does not exist. */
+		break;
+	}
+}
+
+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);
+
+	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 |= ADVERTISED_10baseT_Half;
+	if (bp->flags & B44_FLAG_ADV_10FULL)
+		cmd->advertising |= ADVERTISED_10baseT_Full;
+	if (bp->flags & B44_FLAG_ADV_100HALF)
+		cmd->advertising |= ADVERTISED_100baseT_Half;
+	if (bp->flags & B44_FLAG_ADV_100FULL)
+		cmd->advertising |= ADVERTISED_100baseT_Full;
+	cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
+	ethtool_cmd_speed_set(cmd, ((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;
+	if (cmd->autoneg == AUTONEG_ENABLE)
+		cmd->advertising |= ADVERTISED_Autoneg;
+	if (!netif_running(dev)){
+		ethtool_cmd_speed_set(cmd, 0);
+		cmd->duplex = 0xff;
+	}
+	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);
+	u32 speed = ethtool_cmd_speed(cmd);
+
+	/* We do not support gigabit. */
+	if (cmd->autoneg == AUTONEG_ENABLE) {
+		if (cmd->advertising &
+		    (ADVERTISED_1000baseT_Half |
+		     ADVERTISED_1000baseT_Full))
+			return -EINVAL;
+	} else if ((speed != SPEED_100 &&
+		    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 |
+			       B44_FLAG_100_BASE_T |
+			       B44_FLAG_FULL_DUPLEX |
+			       B44_FLAG_ADV_10HALF |
+			       B44_FLAG_ADV_10FULL |
+			       B44_FLAG_ADV_100HALF |
+			       B44_FLAG_ADV_100FULL);
+		if (cmd->advertising == 0) {
+			bp->flags |= (B44_FLAG_ADV_10HALF |
+				      B44_FLAG_ADV_10FULL |
+				      B44_FLAG_ADV_100HALF |
+				      B44_FLAG_ADV_100FULL);
+		} else {
+			if (cmd->advertising & ADVERTISED_10baseT_Half)
+				bp->flags |= B44_FLAG_ADV_10HALF;
+			if (cmd->advertising & ADVERTISED_10baseT_Full)
+				bp->flags |= B44_FLAG_ADV_10FULL;
+			if (cmd->advertising & ADVERTISED_100baseT_Half)
+				bp->flags |= B44_FLAG_ADV_100HALF;
+			if (cmd->advertising & ADVERTISED_100baseT_Full)
+				bp->flags |= B44_FLAG_ADV_100FULL;
+		}
+	} else {
+		bp->flags |= B44_FLAG_FORCE_LINK;
+		bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
+		if (speed == SPEED_100)
+			bp->flags |= B44_FLAG_100_BASE_T;
+		if (cmd->duplex == DUPLEX_FULL)
+			bp->flags |= B44_FLAG_FULL_DUPLEX;
+	}
+
+	if (netif_running(dev))
+		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, B44_FULL_RESET);
+	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, B44_FULL_RESET);
+	} else {
+		__b44_set_flow_ctrl(bp, bp->flags);
+	}
+	spin_unlock_irq(&bp->lock);
+
+	b44_enable_ints(bp);
+
+	return 0;
+}
+
+static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+	switch(stringset) {
+	case ETH_SS_STATS:
+		memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
+		break;
+	}
+}
+
+static int b44_get_sset_count(struct net_device *dev, int sset)
+{
+	switch (sset) {
+	case ETH_SS_STATS:
+		return ARRAY_SIZE(b44_gstrings);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static void b44_get_ethtool_stats(struct net_device *dev,
+				  struct ethtool_stats *stats, u64 *data)
+{
+	struct b44 *bp = netdev_priv(dev);
+	u32 *val = &bp->hw_stats.tx_good_octets;
+	u32 i;
+
+	spin_lock_irq(&bp->lock);
+
+	b44_stats_update(bp);
+
+	for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
+		*data++ = *val++;
+
+	spin_unlock_irq(&bp->lock);
+}
+
+static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	wol->supported = WAKE_MAGIC;
+	if (bp->flags & B44_FLAG_WOL_ENABLE)
+		wol->wolopts = WAKE_MAGIC;
+	else
+		wol->wolopts = 0;
+	memset(&wol->sopass, 0, sizeof(wol->sopass));
+}
+
+static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+	struct b44 *bp = netdev_priv(dev);
+
+	spin_lock_irq(&bp->lock);
+	if (wol->wolopts & WAKE_MAGIC)
+		bp->flags |= B44_FLAG_WOL_ENABLE;
+	else
+		bp->flags &= ~B44_FLAG_WOL_ENABLE;
+	spin_unlock_irq(&bp->lock);
+
+	return 0;
+}
+
+static const 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_wol		= b44_get_wol,
+	.set_wol		= b44_set_wol,
+	.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,
+	.get_strings		= b44_get_strings,
+	.get_sset_count		= b44_get_sset_count,
+	.get_ethtool_stats	= b44_get_ethtool_stats,
+};
+
+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 = -EINVAL;
+
+	if (!netif_running(dev))
+		goto out;
+
+	spin_lock_irq(&bp->lock);
+	err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
+	spin_unlock_irq(&bp->lock);
+out:
+	return err;
+}
+
+static int __devinit b44_get_invariants(struct b44 *bp)
+{
+	struct ssb_device *sdev = bp->sdev;
+	int err = 0;
+	u8 *addr;
+
+	bp->dma_offset = ssb_dma_translation(sdev);
+
+	if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
+	    instance > 1) {
+		addr = sdev->bus->sprom.et1mac;
+		bp->phy_addr = sdev->bus->sprom.et1phyaddr;
+	} else {
+		addr = sdev->bus->sprom.et0mac;
+		bp->phy_addr = sdev->bus->sprom.et0phyaddr;
+	}
+	/* Some ROMs have buggy PHY addresses with the high
+	 * bits set (sign extension?). Truncate them to a
+	 * valid PHY address. */
+	bp->phy_addr &= 0x1F;
+
+	memcpy(bp->dev->dev_addr, addr, 6);
+
+	if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
+		pr_err("Invalid MAC address found in EEPROM\n");
+		return -EINVAL;
+	}
+
+	memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
+
+	bp->imask = IMASK_DEF;
+
+	/* XXX - really required?
+	   bp->flags |= B44_FLAG_BUGGY_TXPTR;
+	*/
+
+	if (bp->sdev->id.revision >= 7)
+		bp->flags |= B44_FLAG_B0_ANDLATER;
+
+	return err;
+}
+
+static const struct net_device_ops b44_netdev_ops = {
+	.ndo_open		= b44_open,
+	.ndo_stop		= b44_close,
+	.ndo_start_xmit		= b44_start_xmit,
+	.ndo_get_stats		= b44_get_stats,
+	.ndo_set_multicast_list = b44_set_rx_mode,
+	.ndo_set_mac_address	= b44_set_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_do_ioctl		= b44_ioctl,
+	.ndo_tx_timeout		= b44_tx_timeout,
+	.ndo_change_mtu		= b44_change_mtu,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller	= b44_poll_controller,
+#endif
+};
+
+static int __devinit b44_init_one(struct ssb_device *sdev,
+				  const struct ssb_device_id *ent)
+{
+	struct net_device *dev;
+	struct b44 *bp;
+	int err;
+
+	instance++;
+
+	pr_info_once("%s version %s\n", DRV_DESCRIPTION, DRV_MODULE_VERSION);
+
+	dev = alloc_etherdev(sizeof(*bp));
+	if (!dev) {
+		dev_err(sdev->dev, "Etherdev alloc failed, aborting\n");
+		err = -ENOMEM;
+		goto out;
+	}
+
+	SET_NETDEV_DEV(dev, sdev->dev);
+
+	/* No interesting netdevice features in this card... */
+	dev->features |= 0;
+
+	bp = netdev_priv(dev);
+	bp->sdev = sdev;
+	bp->dev = dev;
+	bp->force_copybreak = 0;
+
+	bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
+
+	spin_lock_init(&bp->lock);
+
+	bp->rx_pending = B44_DEF_RX_RING_PENDING;
+	bp->tx_pending = B44_DEF_TX_RING_PENDING;
+
+	dev->netdev_ops = &b44_netdev_ops;
+	netif_napi_add(dev, &bp->napi, b44_poll, 64);
+	dev->watchdog_timeo = B44_TX_TIMEOUT;
+	dev->irq = sdev->irq;
+	SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
+
+	err = ssb_bus_powerup(sdev->bus, 0);
+	if (err) {
+		dev_err(sdev->dev,
+			"Failed to powerup the bus\n");
+		goto err_out_free_dev;
+	}
+
+	if (dma_set_mask(sdev->dma_dev, DMA_BIT_MASK(30)) ||
+	    dma_set_coherent_mask(sdev->dma_dev, DMA_BIT_MASK(30))) {
+		dev_err(sdev->dev,
+			"Required 30BIT DMA mask unsupported by the system\n");
+		goto err_out_powerdown;
+	}
+
+	err = b44_get_invariants(bp);
+	if (err) {
+		dev_err(sdev->dev,
+			"Problem fetching invariants of chip, aborting\n");
+		goto err_out_powerdown;
+	}
+
+	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) {
+		dev_err(sdev->dev, "Cannot register net device, aborting\n");
+		goto err_out_powerdown;
+	}
+
+	netif_carrier_off(dev);
+
+	ssb_set_drvdata(sdev, dev);
+
+	/* Chip reset provides power to the b44 MAC & PCI cores, which
+	 * is necessary for MAC register access.
+	 */
+	b44_chip_reset(bp, B44_CHIP_RESET_FULL);
+
+	/* do a phy reset to test if there is an active phy */
+	if (b44_phy_reset(bp) < 0)
+		bp->phy_addr = B44_PHY_ADDR_NO_PHY;
+
+	netdev_info(dev, "%s %pM\n", DRV_DESCRIPTION, dev->dev_addr);
+
+	return 0;
+
+err_out_powerdown:
+	ssb_bus_may_powerdown(sdev->bus);
+
+err_out_free_dev:
+	free_netdev(dev);
+
+out:
+	return err;
+}
+
+static void __devexit b44_remove_one(struct ssb_device *sdev)
+{
+	struct net_device *dev = ssb_get_drvdata(sdev);
+
+	unregister_netdev(dev);
+	ssb_device_disable(sdev, 0);
+	ssb_bus_may_powerdown(sdev->bus);
+	free_netdev(dev);
+	ssb_pcihost_set_power_state(sdev, PCI_D3hot);
+	ssb_set_drvdata(sdev, NULL);
+}
+
+static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
+{
+	struct net_device *dev = ssb_get_drvdata(sdev);
+	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);
+
+	free_irq(dev->irq, dev);
+	if (bp->flags & B44_FLAG_WOL_ENABLE) {
+		b44_init_hw(bp, B44_PARTIAL_RESET);
+		b44_setup_wol(bp);
+	}
+
+	ssb_pcihost_set_power_state(sdev, PCI_D3hot);
+	return 0;
+}
+
+static int b44_resume(struct ssb_device *sdev)
+{
+	struct net_device *dev = ssb_get_drvdata(sdev);
+	struct b44 *bp = netdev_priv(dev);
+	int rc = 0;
+
+	rc = ssb_bus_powerup(sdev->bus, 0);
+	if (rc) {
+		dev_err(sdev->dev,
+			"Failed to powerup the bus\n");
+		return rc;
+	}
+
+	if (!netif_running(dev))
+		return 0;
+
+	spin_lock_irq(&bp->lock);
+	b44_init_rings(bp);
+	b44_init_hw(bp, B44_FULL_RESET);
+	spin_unlock_irq(&bp->lock);
+
+	/*
+	 * As a shared interrupt, the handler can be called immediately. To be
+	 * able to check the interrupt status the hardware must already be
+	 * powered back on (b44_init_hw).
+	 */
+	rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
+	if (rc) {
+		netdev_err(dev, "request_irq failed\n");
+		spin_lock_irq(&bp->lock);
+		b44_halt(bp);
+		b44_free_rings(bp);
+		spin_unlock_irq(&bp->lock);
+		return rc;
+	}
+
+	netif_device_attach(bp->dev);
+
+	b44_enable_ints(bp);
+	netif_wake_queue(dev);
+
+	mod_timer(&bp->timer, jiffies + 1);
+
+	return 0;
+}
+
+static struct ssb_driver b44_ssb_driver = {
+	.name		= DRV_MODULE_NAME,
+	.id_table	= b44_ssb_tbl,
+	.probe		= b44_init_one,
+	.remove		= __devexit_p(b44_remove_one),
+	.suspend	= b44_suspend,
+	.resume		= b44_resume,
+};
+
+static inline int __init b44_pci_init(void)
+{
+	int err = 0;
+#ifdef CONFIG_B44_PCI
+	err = ssb_pcihost_register(&b44_pci_driver);
+#endif
+	return err;
+}
+
+static inline void __exit b44_pci_exit(void)
+{
+#ifdef CONFIG_B44_PCI
+	ssb_pcihost_unregister(&b44_pci_driver);
+#endif
+}
+
+static int __init b44_init(void)
+{
+	unsigned int dma_desc_align_size = dma_get_cache_alignment();
+	int err;
+
+	/* Setup paramaters for syncing RX/TX DMA descriptors */
+	dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
+
+	err = b44_pci_init();
+	if (err)
+		return err;
+	err = ssb_driver_register(&b44_ssb_driver);
+	if (err)
+		b44_pci_exit();
+	return err;
+}
+
+static void __exit b44_cleanup(void)
+{
+	ssb_driver_unregister(&b44_ssb_driver);
+	b44_pci_exit();
+}
+
+module_init(b44_init);
+module_exit(b44_cleanup);
+