bmac/mace/macmace/mac89x0/cs89x0: Move the Macintosh (Apple) drivers

Move the Apple drivers into driver/net/ethernet/apple/ and make the
necessary Kconfig and Makefile changes.

CC: Paul Mackerras <paulus@samba.org>
CC: Paul Mackerras <paulus@au.ibm.com>
CC: Russell Nelson <nelson@crynwr.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 1685 insertions, 0 deletions

diff --git a/drivers/net/ethernet/apple/bmac.c b/drivers/net/ethernet/apple/bmac.c
new file mode 100644
index 000000000000..45e45e8d3d66
--- /dev/null
+++ b/drivers/net/ethernet/apple/bmac.c
@@ -0,0 +1,1685 @@
+/*
+ * Network device driver for the BMAC ethernet controller on
+ * Apple Powermacs.  Assumes it's under a DBDMA controller.
+ *
+ * Copyright (C) 1998 Randy Gobbel.
+ *
+ * May 1999, Al Viro: proper release of /proc/net/bmac entry, switched to
+ * dynamic procfs inode.
+ */
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/crc32.h>
+#include <linux/bitrev.h>
+#include <linux/ethtool.h>
+#include <linux/slab.h>
+#include <asm/prom.h>
+#include <asm/dbdma.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/machdep.h>
+#include <asm/pmac_feature.h>
+#include <asm/macio.h>
+#include <asm/irq.h>
+
+#include "bmac.h"
+
+#define trunc_page(x)	((void *)(((unsigned long)(x)) & ~((unsigned long)(PAGE_SIZE - 1))))
+#define round_page(x)	trunc_page(((unsigned long)(x)) + ((unsigned long)(PAGE_SIZE - 1)))
+
+/*
+ * CRC polynomial - used in working out multicast filter bits.
+ */
+#define ENET_CRCPOLY 0x04c11db7
+
+/* switch to use multicast code lifted from sunhme driver */
+#define SUNHME_MULTICAST
+
+#define N_RX_RING	64
+#define N_TX_RING	32
+#define MAX_TX_ACTIVE	1
+#define ETHERCRC	4
+#define ETHERMINPACKET	64
+#define ETHERMTU	1500
+#define RX_BUFLEN	(ETHERMTU + 14 + ETHERCRC + 2)
+#define TX_TIMEOUT	HZ	/* 1 second */
+
+/* Bits in transmit DMA status */
+#define TX_DMA_ERR	0x80
+
+#define XXDEBUG(args)
+
+struct bmac_data {
+	/* volatile struct bmac *bmac; */
+	struct sk_buff_head *queue;
+	volatile struct dbdma_regs __iomem *tx_dma;
+	int tx_dma_intr;
+	volatile struct dbdma_regs __iomem *rx_dma;
+	int rx_dma_intr;
+	volatile struct dbdma_cmd *tx_cmds;	/* xmit dma command list */
+	volatile struct dbdma_cmd *rx_cmds;	/* recv dma command list */
+	struct macio_dev *mdev;
+	int is_bmac_plus;
+	struct sk_buff *rx_bufs[N_RX_RING];
+	int rx_fill;
+	int rx_empty;
+	struct sk_buff *tx_bufs[N_TX_RING];
+	int tx_fill;
+	int tx_empty;
+	unsigned char tx_fullup;
+	struct timer_list tx_timeout;
+	int timeout_active;
+	int sleeping;
+	int opened;
+	unsigned short hash_use_count[64];
+	unsigned short hash_table_mask[4];
+	spinlock_t lock;
+};
+
+#if 0 /* Move that to ethtool */
+
+typedef struct bmac_reg_entry {
+	char *name;
+	unsigned short reg_offset;
+} bmac_reg_entry_t;
+
+#define N_REG_ENTRIES 31
+
+static bmac_reg_entry_t reg_entries[N_REG_ENTRIES] = {
+	{"MEMADD", MEMADD},
+	{"MEMDATAHI", MEMDATAHI},
+	{"MEMDATALO", MEMDATALO},
+	{"TXPNTR", TXPNTR},
+	{"RXPNTR", RXPNTR},
+	{"IPG1", IPG1},
+	{"IPG2", IPG2},
+	{"ALIMIT", ALIMIT},
+	{"SLOT", SLOT},
+	{"PALEN", PALEN},
+	{"PAPAT", PAPAT},
+	{"TXSFD", TXSFD},
+	{"JAM", JAM},
+	{"TXCFG", TXCFG},
+	{"TXMAX", TXMAX},
+	{"TXMIN", TXMIN},
+	{"PAREG", PAREG},
+	{"DCNT", DCNT},
+	{"NCCNT", NCCNT},
+	{"NTCNT", NTCNT},
+	{"EXCNT", EXCNT},
+	{"LTCNT", LTCNT},
+	{"TXSM", TXSM},
+	{"RXCFG", RXCFG},
+	{"RXMAX", RXMAX},
+	{"RXMIN", RXMIN},
+	{"FRCNT", FRCNT},
+	{"AECNT", AECNT},
+	{"FECNT", FECNT},
+	{"RXSM", RXSM},
+	{"RXCV", RXCV}
+};
+
+#endif
+
+static unsigned char *bmac_emergency_rxbuf;
+
+/*
+ * Number of bytes of private data per BMAC: allow enough for
+ * the rx and tx dma commands plus a branch dma command each,
+ * and another 16 bytes to allow us to align the dma command
+ * buffers on a 16 byte boundary.
+ */
+#define PRIV_BYTES	(sizeof(struct bmac_data) \
+	+ (N_RX_RING + N_TX_RING + 4) * sizeof(struct dbdma_cmd) \
+	+ sizeof(struct sk_buff_head))
+
+static int bmac_open(struct net_device *dev);
+static int bmac_close(struct net_device *dev);
+static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev);
+static void bmac_set_multicast(struct net_device *dev);
+static void bmac_reset_and_enable(struct net_device *dev);
+static void bmac_start_chip(struct net_device *dev);
+static void bmac_init_chip(struct net_device *dev);
+static void bmac_init_registers(struct net_device *dev);
+static void bmac_enable_and_reset_chip(struct net_device *dev);
+static int bmac_set_address(struct net_device *dev, void *addr);
+static irqreturn_t bmac_misc_intr(int irq, void *dev_id);
+static irqreturn_t bmac_txdma_intr(int irq, void *dev_id);
+static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id);
+static void bmac_set_timeout(struct net_device *dev);
+static void bmac_tx_timeout(unsigned long data);
+static int bmac_output(struct sk_buff *skb, struct net_device *dev);
+static void bmac_start(struct net_device *dev);
+
+#define	DBDMA_SET(x)	( ((x) | (x) << 16) )
+#define	DBDMA_CLEAR(x)	( (x) << 16)
+
+static inline void
+dbdma_st32(volatile __u32 __iomem *a, unsigned long x)
+{
+	__asm__ volatile( "stwbrx %0,0,%1" : : "r" (x), "r" (a) : "memory");
+}
+
+static inline unsigned long
+dbdma_ld32(volatile __u32 __iomem *a)
+{
+	__u32 swap;
+	__asm__ volatile ("lwbrx %0,0,%1" :  "=r" (swap) : "r" (a));
+	return swap;
+}
+
+static void
+dbdma_continue(volatile struct dbdma_regs __iomem *dmap)
+{
+	dbdma_st32(&dmap->control,
+		   DBDMA_SET(RUN|WAKE) | DBDMA_CLEAR(PAUSE|DEAD));
+	eieio();
+}
+
+static void
+dbdma_reset(volatile struct dbdma_regs __iomem *dmap)
+{
+	dbdma_st32(&dmap->control,
+		   DBDMA_CLEAR(ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN));
+	eieio();
+	while (dbdma_ld32(&dmap->status) & RUN)
+		eieio();
+}
+
+static void
+dbdma_setcmd(volatile struct dbdma_cmd *cp,
+	     unsigned short cmd, unsigned count, unsigned long addr,
+	     unsigned long cmd_dep)
+{
+	out_le16(&cp->command, cmd);
+	out_le16(&cp->req_count, count);
+	out_le32(&cp->phy_addr, addr);
+	out_le32(&cp->cmd_dep, cmd_dep);
+	out_le16(&cp->xfer_status, 0);
+	out_le16(&cp->res_count, 0);
+}
+
+static inline
+void bmwrite(struct net_device *dev, unsigned long reg_offset, unsigned data )
+{
+	out_le16((void __iomem *)dev->base_addr + reg_offset, data);
+}
+
+
+static inline
+unsigned short bmread(struct net_device *dev, unsigned long reg_offset )
+{
+	return in_le16((void __iomem *)dev->base_addr + reg_offset);
+}
+
+static void
+bmac_enable_and_reset_chip(struct net_device *dev)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
+	volatile struct dbdma_regs __iomem *td = bp->tx_dma;
+
+	if (rd)
+		dbdma_reset(rd);
+	if (td)
+		dbdma_reset(td);
+
+	pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 1);
+}
+
+#define MIFDELAY	udelay(10)
+
+static unsigned int
+bmac_mif_readbits(struct net_device *dev, int nb)
+{
+	unsigned int val = 0;
+
+	while (--nb >= 0) {
+		bmwrite(dev, MIFCSR, 0);
+		MIFDELAY;
+		if (bmread(dev, MIFCSR) & 8)
+			val |= 1 << nb;
+		bmwrite(dev, MIFCSR, 1);
+		MIFDELAY;
+	}
+	bmwrite(dev, MIFCSR, 0);
+	MIFDELAY;
+	bmwrite(dev, MIFCSR, 1);
+	MIFDELAY;
+	return val;
+}
+
+static void
+bmac_mif_writebits(struct net_device *dev, unsigned int val, int nb)
+{
+	int b;
+
+	while (--nb >= 0) {
+		b = (val & (1 << nb))? 6: 4;
+		bmwrite(dev, MIFCSR, b);
+		MIFDELAY;
+		bmwrite(dev, MIFCSR, b|1);
+		MIFDELAY;
+	}
+}
+
+static unsigned int
+bmac_mif_read(struct net_device *dev, unsigned int addr)
+{
+	unsigned int val;
+
+	bmwrite(dev, MIFCSR, 4);
+	MIFDELAY;
+	bmac_mif_writebits(dev, ~0U, 32);
+	bmac_mif_writebits(dev, 6, 4);
+	bmac_mif_writebits(dev, addr, 10);
+	bmwrite(dev, MIFCSR, 2);
+	MIFDELAY;
+	bmwrite(dev, MIFCSR, 1);
+	MIFDELAY;
+	val = bmac_mif_readbits(dev, 17);
+	bmwrite(dev, MIFCSR, 4);
+	MIFDELAY;
+	return val;
+}
+
+static void
+bmac_mif_write(struct net_device *dev, unsigned int addr, unsigned int val)
+{
+	bmwrite(dev, MIFCSR, 4);
+	MIFDELAY;
+	bmac_mif_writebits(dev, ~0U, 32);
+	bmac_mif_writebits(dev, 5, 4);
+	bmac_mif_writebits(dev, addr, 10);
+	bmac_mif_writebits(dev, 2, 2);
+	bmac_mif_writebits(dev, val, 16);
+	bmac_mif_writebits(dev, 3, 2);
+}
+
+static void
+bmac_init_registers(struct net_device *dev)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	volatile unsigned short regValue;
+	unsigned short *pWord16;
+	int i;
+
+	/* XXDEBUG(("bmac: enter init_registers\n")); */
+
+	bmwrite(dev, RXRST, RxResetValue);
+	bmwrite(dev, TXRST, TxResetBit);
+
+	i = 100;
+	do {
+		--i;
+		udelay(10000);
+		regValue = bmread(dev, TXRST); /* wait for reset to clear..acknowledge */
+	} while ((regValue & TxResetBit) && i > 0);
+
+	if (!bp->is_bmac_plus) {
+		regValue = bmread(dev, XCVRIF);
+		regValue |= ClkBit | SerialMode | COLActiveLow;
+		bmwrite(dev, XCVRIF, regValue);
+		udelay(10000);
+	}
+
+	bmwrite(dev, RSEED, (unsigned short)0x1968);
+
+	regValue = bmread(dev, XIFC);
+	regValue |= TxOutputEnable;
+	bmwrite(dev, XIFC, regValue);
+
+	bmread(dev, PAREG);
+
+	/* set collision counters to 0 */
+	bmwrite(dev, NCCNT, 0);
+	bmwrite(dev, NTCNT, 0);
+	bmwrite(dev, EXCNT, 0);
+	bmwrite(dev, LTCNT, 0);
+
+	/* set rx counters to 0 */
+	bmwrite(dev, FRCNT, 0);
+	bmwrite(dev, LECNT, 0);
+	bmwrite(dev, AECNT, 0);
+	bmwrite(dev, FECNT, 0);
+	bmwrite(dev, RXCV, 0);
+
+	/* set tx fifo information */
+	bmwrite(dev, TXTH, 4);	/* 4 octets before tx starts */
+
+	bmwrite(dev, TXFIFOCSR, 0);	/* first disable txFIFO */
+	bmwrite(dev, TXFIFOCSR, TxFIFOEnable );
+
+	/* set rx fifo information */
+	bmwrite(dev, RXFIFOCSR, 0);	/* first disable rxFIFO */
+	bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
+
+	//bmwrite(dev, TXCFG, TxMACEnable);	       	/* TxNeverGiveUp maybe later */
+	bmread(dev, STATUS);		/* read it just to clear it */
+
+	/* zero out the chip Hash Filter registers */
+	for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
+	bmwrite(dev, BHASH3, bp->hash_table_mask[0]); 	/* bits 15 - 0 */
+	bmwrite(dev, BHASH2, bp->hash_table_mask[1]); 	/* bits 31 - 16 */
+	bmwrite(dev, BHASH1, bp->hash_table_mask[2]); 	/* bits 47 - 32 */
+	bmwrite(dev, BHASH0, bp->hash_table_mask[3]); 	/* bits 63 - 48 */
+
+	pWord16 = (unsigned short *)dev->dev_addr;
+	bmwrite(dev, MADD0, *pWord16++);
+	bmwrite(dev, MADD1, *pWord16++);
+	bmwrite(dev, MADD2, *pWord16);
+
+	bmwrite(dev, RXCFG, RxCRCNoStrip | RxHashFilterEnable | RxRejectOwnPackets);
+
+	bmwrite(dev, INTDISABLE, EnableNormal);
+}
+
+#if 0
+static void
+bmac_disable_interrupts(struct net_device *dev)
+{
+	bmwrite(dev, INTDISABLE, DisableAll);
+}
+
+static void
+bmac_enable_interrupts(struct net_device *dev)
+{
+	bmwrite(dev, INTDISABLE, EnableNormal);
+}
+#endif
+
+
+static void
+bmac_start_chip(struct net_device *dev)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
+	unsigned short	oldConfig;
+
+	/* enable rx dma channel */
+	dbdma_continue(rd);
+
+	oldConfig = bmread(dev, TXCFG);
+	bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
+
+	/* turn on rx plus any other bits already on (promiscuous possibly) */
+	oldConfig = bmread(dev, RXCFG);
+	bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
+	udelay(20000);
+}
+
+static void
+bmac_init_phy(struct net_device *dev)
+{
+	unsigned int addr;
+	struct bmac_data *bp = netdev_priv(dev);
+
+	printk(KERN_DEBUG "phy registers:");
+	for (addr = 0; addr < 32; ++addr) {
+		if ((addr & 7) == 0)
+			printk(KERN_DEBUG);
+		printk(KERN_CONT " %.4x", bmac_mif_read(dev, addr));
+	}
+	printk(KERN_CONT "\n");
+
+	if (bp->is_bmac_plus) {
+		unsigned int capable, ctrl;
+
+		ctrl = bmac_mif_read(dev, 0);
+		capable = ((bmac_mif_read(dev, 1) & 0xf800) >> 6) | 1;
+		if (bmac_mif_read(dev, 4) != capable ||
+		    (ctrl & 0x1000) == 0) {
+			bmac_mif_write(dev, 4, capable);
+			bmac_mif_write(dev, 0, 0x1200);
+		} else
+			bmac_mif_write(dev, 0, 0x1000);
+	}
+}
+
+static void bmac_init_chip(struct net_device *dev)
+{
+	bmac_init_phy(dev);
+	bmac_init_registers(dev);
+}
+
+#ifdef CONFIG_PM
+static int bmac_suspend(struct macio_dev *mdev, pm_message_t state)
+{
+	struct net_device* dev = macio_get_drvdata(mdev);
+	struct bmac_data *bp = netdev_priv(dev);
+	unsigned long flags;
+	unsigned short config;
+	int i;
+
+	netif_device_detach(dev);
+	/* prolly should wait for dma to finish & turn off the chip */
+	spin_lock_irqsave(&bp->lock, flags);
+	if (bp->timeout_active) {
+		del_timer(&bp->tx_timeout);
+		bp->timeout_active = 0;
+	}
+	disable_irq(dev->irq);
+	disable_irq(bp->tx_dma_intr);
+	disable_irq(bp->rx_dma_intr);
+	bp->sleeping = 1;
+	spin_unlock_irqrestore(&bp->lock, flags);
+	if (bp->opened) {
+		volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
+		volatile struct dbdma_regs __iomem *td = bp->tx_dma;
+
+		config = bmread(dev, RXCFG);
+		bmwrite(dev, RXCFG, (config & ~RxMACEnable));
+		config = bmread(dev, TXCFG);
+       		bmwrite(dev, TXCFG, (config & ~TxMACEnable));
+		bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */
+       		/* disable rx and tx dma */
+       		st_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE));	/* clear run bit */
+       		st_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE));	/* clear run bit */
+       		/* free some skb's */
+       		for (i=0; i<N_RX_RING; i++) {
+       			if (bp->rx_bufs[i] != NULL) {
+       				dev_kfree_skb(bp->rx_bufs[i]);
+       				bp->rx_bufs[i] = NULL;
+       			}
+       		}
+       		for (i = 0; i<N_TX_RING; i++) {
+			if (bp->tx_bufs[i] != NULL) {
+		       		dev_kfree_skb(bp->tx_bufs[i]);
+	       			bp->tx_bufs[i] = NULL;
+		       	}
+		}
+	}
+       	pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
+	return 0;
+}
+
+static int bmac_resume(struct macio_dev *mdev)
+{
+	struct net_device* dev = macio_get_drvdata(mdev);
+	struct bmac_data *bp = netdev_priv(dev);
+
+	/* see if this is enough */
+	if (bp->opened)
+		bmac_reset_and_enable(dev);
+
+	enable_irq(dev->irq);
+       	enable_irq(bp->tx_dma_intr);
+       	enable_irq(bp->rx_dma_intr);
+       	netif_device_attach(dev);
+
+	return 0;
+}
+#endif /* CONFIG_PM */
+
+static int bmac_set_address(struct net_device *dev, void *addr)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	unsigned char *p = addr;
+	unsigned short *pWord16;
+	unsigned long flags;
+	int i;
+
+	XXDEBUG(("bmac: enter set_address\n"));
+	spin_lock_irqsave(&bp->lock, flags);
+
+	for (i = 0; i < 6; ++i) {
+		dev->dev_addr[i] = p[i];
+	}
+	/* load up the hardware address */
+	pWord16  = (unsigned short *)dev->dev_addr;
+	bmwrite(dev, MADD0, *pWord16++);
+	bmwrite(dev, MADD1, *pWord16++);
+	bmwrite(dev, MADD2, *pWord16);
+
+	spin_unlock_irqrestore(&bp->lock, flags);
+	XXDEBUG(("bmac: exit set_address\n"));
+	return 0;
+}
+
+static inline void bmac_set_timeout(struct net_device *dev)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&bp->lock, flags);
+	if (bp->timeout_active)
+		del_timer(&bp->tx_timeout);
+	bp->tx_timeout.expires = jiffies + TX_TIMEOUT;
+	bp->tx_timeout.function = bmac_tx_timeout;
+	bp->tx_timeout.data = (unsigned long) dev;
+	add_timer(&bp->tx_timeout);
+	bp->timeout_active = 1;
+	spin_unlock_irqrestore(&bp->lock, flags);
+}
+
+static void
+bmac_construct_xmt(struct sk_buff *skb, volatile struct dbdma_cmd *cp)
+{
+	void *vaddr;
+	unsigned long baddr;
+	unsigned long len;
+
+	len = skb->len;
+	vaddr = skb->data;
+	baddr = virt_to_bus(vaddr);
+
+	dbdma_setcmd(cp, (OUTPUT_LAST | INTR_ALWAYS | WAIT_IFCLR), len, baddr, 0);
+}
+
+static void
+bmac_construct_rxbuff(struct sk_buff *skb, volatile struct dbdma_cmd *cp)
+{
+	unsigned char *addr = skb? skb->data: bmac_emergency_rxbuf;
+
+	dbdma_setcmd(cp, (INPUT_LAST | INTR_ALWAYS), RX_BUFLEN,
+		     virt_to_bus(addr), 0);
+}
+
+static void
+bmac_init_tx_ring(struct bmac_data *bp)
+{
+	volatile struct dbdma_regs __iomem *td = bp->tx_dma;
+
+	memset((char *)bp->tx_cmds, 0, (N_TX_RING+1) * sizeof(struct dbdma_cmd));
+
+	bp->tx_empty = 0;
+	bp->tx_fill = 0;
+	bp->tx_fullup = 0;
+
+	/* put a branch at the end of the tx command list */
+	dbdma_setcmd(&bp->tx_cmds[N_TX_RING],
+		     (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->tx_cmds));
+
+	/* reset tx dma */
+	dbdma_reset(td);
+	out_le32(&td->wait_sel, 0x00200020);
+	out_le32(&td->cmdptr, virt_to_bus(bp->tx_cmds));
+}
+
+static int
+bmac_init_rx_ring(struct bmac_data *bp)
+{
+	volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
+	int i;
+	struct sk_buff *skb;
+
+	/* initialize list of sk_buffs for receiving and set up recv dma */
+	memset((char *)bp->rx_cmds, 0,
+	       (N_RX_RING + 1) * sizeof(struct dbdma_cmd));
+	for (i = 0; i < N_RX_RING; i++) {
+		if ((skb = bp->rx_bufs[i]) == NULL) {
+			bp->rx_bufs[i] = skb = dev_alloc_skb(RX_BUFLEN+2);
+			if (skb != NULL)
+				skb_reserve(skb, 2);
+		}
+		bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
+	}
+
+	bp->rx_empty = 0;
+	bp->rx_fill = i;
+
+	/* Put a branch back to the beginning of the receive command list */
+	dbdma_setcmd(&bp->rx_cmds[N_RX_RING],
+		     (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->rx_cmds));
+
+	/* start rx dma */
+	dbdma_reset(rd);
+	out_le32(&rd->cmdptr, virt_to_bus(bp->rx_cmds));
+
+	return 1;
+}
+
+
+static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	volatile struct dbdma_regs __iomem *td = bp->tx_dma;
+	int i;
+
+	/* see if there's a free slot in the tx ring */
+	/* XXDEBUG(("bmac_xmit_start: empty=%d fill=%d\n", */
+	/* 	     bp->tx_empty, bp->tx_fill)); */
+	i = bp->tx_fill + 1;
+	if (i >= N_TX_RING)
+		i = 0;
+	if (i == bp->tx_empty) {
+		netif_stop_queue(dev);
+		bp->tx_fullup = 1;
+		XXDEBUG(("bmac_transmit_packet: tx ring full\n"));
+		return -1;		/* can't take it at the moment */
+	}
+
+	dbdma_setcmd(&bp->tx_cmds[i], DBDMA_STOP, 0, 0, 0);
+
+	bmac_construct_xmt(skb, &bp->tx_cmds[bp->tx_fill]);
+
+	bp->tx_bufs[bp->tx_fill] = skb;
+	bp->tx_fill = i;
+
+	dev->stats.tx_bytes += skb->len;
+
+	dbdma_continue(td);
+
+	return 0;
+}
+
+static int rxintcount;
+
+static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *) dev_id;
+	struct bmac_data *bp = netdev_priv(dev);
+	volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
+	volatile struct dbdma_cmd *cp;
+	int i, nb, stat;
+	struct sk_buff *skb;
+	unsigned int residual;
+	int last;
+	unsigned long flags;
+
+	spin_lock_irqsave(&bp->lock, flags);
+
+	if (++rxintcount < 10) {
+		XXDEBUG(("bmac_rxdma_intr\n"));
+	}
+
+	last = -1;
+	i = bp->rx_empty;
+
+	while (1) {
+		cp = &bp->rx_cmds[i];
+		stat = ld_le16(&cp->xfer_status);
+		residual = ld_le16(&cp->res_count);
+		if ((stat & ACTIVE) == 0)
+			break;
+		nb = RX_BUFLEN - residual - 2;
+		if (nb < (ETHERMINPACKET - ETHERCRC)) {
+			skb = NULL;
+			dev->stats.rx_length_errors++;
+			dev->stats.rx_errors++;
+		} else {
+			skb = bp->rx_bufs[i];
+			bp->rx_bufs[i] = NULL;
+		}
+		if (skb != NULL) {
+			nb -= ETHERCRC;
+			skb_put(skb, nb);
+			skb->protocol = eth_type_trans(skb, dev);
+			netif_rx(skb);
+			++dev->stats.rx_packets;
+			dev->stats.rx_bytes += nb;
+		} else {
+			++dev->stats.rx_dropped;
+		}
+		if ((skb = bp->rx_bufs[i]) == NULL) {
+			bp->rx_bufs[i] = skb = dev_alloc_skb(RX_BUFLEN+2);
+			if (skb != NULL)
+				skb_reserve(bp->rx_bufs[i], 2);
+		}
+		bmac_construct_rxbuff(skb, &bp->rx_cmds[i]);
+		st_le16(&cp->res_count, 0);
+		st_le16(&cp->xfer_status, 0);
+		last = i;
+		if (++i >= N_RX_RING) i = 0;
+	}
+
+	if (last != -1) {
+		bp->rx_fill = last;
+		bp->rx_empty = i;
+	}
+
+	dbdma_continue(rd);
+	spin_unlock_irqrestore(&bp->lock, flags);
+
+	if (rxintcount < 10) {
+		XXDEBUG(("bmac_rxdma_intr done\n"));
+	}
+	return IRQ_HANDLED;
+}
+
+static int txintcount;
+
+static irqreturn_t bmac_txdma_intr(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *) dev_id;
+	struct bmac_data *bp = netdev_priv(dev);
+	volatile struct dbdma_cmd *cp;
+	int stat;
+	unsigned long flags;
+
+	spin_lock_irqsave(&bp->lock, flags);
+
+	if (txintcount++ < 10) {
+		XXDEBUG(("bmac_txdma_intr\n"));
+	}
+
+	/*     del_timer(&bp->tx_timeout); */
+	/*     bp->timeout_active = 0; */
+
+	while (1) {
+		cp = &bp->tx_cmds[bp->tx_empty];
+		stat = ld_le16(&cp->xfer_status);
+		if (txintcount < 10) {
+			XXDEBUG(("bmac_txdma_xfer_stat=%#0x\n", stat));
+		}
+		if (!(stat & ACTIVE)) {
+			/*
+			 * status field might not have been filled by DBDMA
+			 */
+			if (cp == bus_to_virt(in_le32(&bp->tx_dma->cmdptr)))
+				break;
+		}
+
+		if (bp->tx_bufs[bp->tx_empty]) {
+			++dev->stats.tx_packets;
+			dev_kfree_skb_irq(bp->tx_bufs[bp->tx_empty]);
+		}
+		bp->tx_bufs[bp->tx_empty] = NULL;
+		bp->tx_fullup = 0;
+		netif_wake_queue(dev);
+		if (++bp->tx_empty >= N_TX_RING)
+			bp->tx_empty = 0;
+		if (bp->tx_empty == bp->tx_fill)
+			break;
+	}
+
+	spin_unlock_irqrestore(&bp->lock, flags);
+
+	if (txintcount < 10) {
+		XXDEBUG(("bmac_txdma_intr done->bmac_start\n"));
+	}
+
+	bmac_start(dev);
+	return IRQ_HANDLED;
+}
+
+#ifndef SUNHME_MULTICAST
+/* Real fast bit-reversal algorithm, 6-bit values */
+static int reverse6[64] = {
+	0x0,0x20,0x10,0x30,0x8,0x28,0x18,0x38,
+	0x4,0x24,0x14,0x34,0xc,0x2c,0x1c,0x3c,
+	0x2,0x22,0x12,0x32,0xa,0x2a,0x1a,0x3a,
+	0x6,0x26,0x16,0x36,0xe,0x2e,0x1e,0x3e,
+	0x1,0x21,0x11,0x31,0x9,0x29,0x19,0x39,
+	0x5,0x25,0x15,0x35,0xd,0x2d,0x1d,0x3d,
+	0x3,0x23,0x13,0x33,0xb,0x2b,0x1b,0x3b,
+	0x7,0x27,0x17,0x37,0xf,0x2f,0x1f,0x3f
+};
+
+static unsigned int
+crc416(unsigned int curval, unsigned short nxtval)
+{
+	register unsigned int counter, cur = curval, next = nxtval;
+	register int high_crc_set, low_data_set;
+
+	/* Swap bytes */
+	next = ((next & 0x00FF) << 8) | (next >> 8);
+
+	/* Compute bit-by-bit */
+	for (counter = 0; counter < 16; ++counter) {
+		/* is high CRC bit set? */
+		if ((cur & 0x80000000) == 0) high_crc_set = 0;
+		else high_crc_set = 1;
+
+		cur = cur << 1;
+
+		if ((next & 0x0001) == 0) low_data_set = 0;
+		else low_data_set = 1;
+
+		next = next >> 1;
+
+		/* do the XOR */
+		if (high_crc_set ^ low_data_set) cur = cur ^ ENET_CRCPOLY;
+	}
+	return cur;
+}
+
+static unsigned int
+bmac_crc(unsigned short *address)
+{
+	unsigned int newcrc;
+
+	XXDEBUG(("bmac_crc: addr=%#04x, %#04x, %#04x\n", *address, address[1], address[2]));
+	newcrc = crc416(0xffffffff, *address);	/* address bits 47 - 32 */
+	newcrc = crc416(newcrc, address[1]);	/* address bits 31 - 16 */
+	newcrc = crc416(newcrc, address[2]);	/* address bits 15 - 0  */
+
+	return(newcrc);
+}
+
+/*
+ * Add requested mcast addr to BMac's hash table filter.
+ *
+ */
+
+static void
+bmac_addhash(struct bmac_data *bp, unsigned char *addr)
+{
+	unsigned int	 crc;
+	unsigned short	 mask;
+
+	if (!(*addr)) return;
+	crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */
+	crc = reverse6[crc];	/* Hyperfast bit-reversing algorithm */
+	if (bp->hash_use_count[crc]++) return; /* This bit is already set */
+	mask = crc % 16;
+	mask = (unsigned char)1 << mask;
+	bp->hash_use_count[crc/16] |= mask;
+}
+
+static void
+bmac_removehash(struct bmac_data *bp, unsigned char *addr)
+{
+	unsigned int crc;
+	unsigned char mask;
+
+	/* Now, delete the address from the filter copy, as indicated */
+	crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */
+	crc = reverse6[crc];	/* Hyperfast bit-reversing algorithm */
+	if (bp->hash_use_count[crc] == 0) return; /* That bit wasn't in use! */
+	if (--bp->hash_use_count[crc]) return; /* That bit is still in use */
+	mask = crc % 16;
+	mask = ((unsigned char)1 << mask) ^ 0xffff; /* To turn off bit */
+	bp->hash_table_mask[crc/16] &= mask;
+}
+
+/*
+ * Sync the adapter with the software copy of the multicast mask
+ *  (logical address filter).
+ */
+
+static void
+bmac_rx_off(struct net_device *dev)
+{
+	unsigned short rx_cfg;
+
+	rx_cfg = bmread(dev, RXCFG);
+	rx_cfg &= ~RxMACEnable;
+	bmwrite(dev, RXCFG, rx_cfg);
+	do {
+		rx_cfg = bmread(dev, RXCFG);
+	}  while (rx_cfg & RxMACEnable);
+}
+
+unsigned short
+bmac_rx_on(struct net_device *dev, int hash_enable, int promisc_enable)
+{
+	unsigned short rx_cfg;
+
+	rx_cfg = bmread(dev, RXCFG);
+	rx_cfg |= RxMACEnable;
+	if (hash_enable) rx_cfg |= RxHashFilterEnable;
+	else rx_cfg &= ~RxHashFilterEnable;
+	if (promisc_enable) rx_cfg |= RxPromiscEnable;
+	else rx_cfg &= ~RxPromiscEnable;
+	bmwrite(dev, RXRST, RxResetValue);
+	bmwrite(dev, RXFIFOCSR, 0);	/* first disable rxFIFO */
+	bmwrite(dev, RXFIFOCSR, RxFIFOEnable );
+	bmwrite(dev, RXCFG, rx_cfg );
+	return rx_cfg;
+}
+
+static void
+bmac_update_hash_table_mask(struct net_device *dev, struct bmac_data *bp)
+{
+	bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */
+	bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */
+	bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */
+	bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */
+}
+
+#if 0
+static void
+bmac_add_multi(struct net_device *dev,
+	       struct bmac_data *bp, unsigned char *addr)
+{
+	/* XXDEBUG(("bmac: enter bmac_add_multi\n")); */
+	bmac_addhash(bp, addr);
+	bmac_rx_off(dev);
+	bmac_update_hash_table_mask(dev, bp);
+	bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0);
+	/* XXDEBUG(("bmac: exit bmac_add_multi\n")); */
+}
+
+static void
+bmac_remove_multi(struct net_device *dev,
+		  struct bmac_data *bp, unsigned char *addr)
+{
+	bmac_removehash(bp, addr);
+	bmac_rx_off(dev);
+	bmac_update_hash_table_mask(dev, bp);
+	bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0);
+}
+#endif
+
+/* Set or clear the multicast filter for this adaptor.
+    num_addrs == -1	Promiscuous mode, receive all packets
+    num_addrs == 0	Normal mode, clear multicast list
+    num_addrs > 0	Multicast mode, receive normal and MC packets, and do
+			best-effort filtering.
+ */
+static void bmac_set_multicast(struct net_device *dev)
+{
+	struct netdev_hw_addr *ha;
+	struct bmac_data *bp = netdev_priv(dev);
+	int num_addrs = netdev_mc_count(dev);
+	unsigned short rx_cfg;
+	int i;
+
+	if (bp->sleeping)
+		return;
+
+	XXDEBUG(("bmac: enter bmac_set_multicast, n_addrs=%d\n", num_addrs));
+
+	if((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
+		for (i=0; i<4; i++) bp->hash_table_mask[i] = 0xffff;
+		bmac_update_hash_table_mask(dev, bp);
+		rx_cfg = bmac_rx_on(dev, 1, 0);
+		XXDEBUG(("bmac: all multi, rx_cfg=%#08x\n"));
+	} else if ((dev->flags & IFF_PROMISC) || (num_addrs < 0)) {
+		rx_cfg = bmread(dev, RXCFG);
+		rx_cfg |= RxPromiscEnable;
+		bmwrite(dev, RXCFG, rx_cfg);
+		rx_cfg = bmac_rx_on(dev, 0, 1);
+		XXDEBUG(("bmac: promisc mode enabled, rx_cfg=%#08x\n", rx_cfg));
+	} else {
+		for (i=0; i<4; i++) bp->hash_table_mask[i] = 0;
+		for (i=0; i<64; i++) bp->hash_use_count[i] = 0;
+		if (num_addrs == 0) {
+			rx_cfg = bmac_rx_on(dev, 0, 0);
+			XXDEBUG(("bmac: multi disabled, rx_cfg=%#08x\n", rx_cfg));
+		} else {
+			netdev_for_each_mc_addr(ha, dev)
+				bmac_addhash(bp, ha->addr);
+			bmac_update_hash_table_mask(dev, bp);
+			rx_cfg = bmac_rx_on(dev, 1, 0);
+			XXDEBUG(("bmac: multi enabled, rx_cfg=%#08x\n", rx_cfg));
+		}
+	}
+	/* XXDEBUG(("bmac: exit bmac_set_multicast\n")); */
+}
+#else /* ifdef SUNHME_MULTICAST */
+
+/* The version of set_multicast below was lifted from sunhme.c */
+
+static void bmac_set_multicast(struct net_device *dev)
+{
+	struct netdev_hw_addr *ha;
+	int i;
+	unsigned short rx_cfg;
+	u32 crc;
+
+	if((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
+		bmwrite(dev, BHASH0, 0xffff);
+		bmwrite(dev, BHASH1, 0xffff);
+		bmwrite(dev, BHASH2, 0xffff);
+		bmwrite(dev, BHASH3, 0xffff);
+	} else if(dev->flags & IFF_PROMISC) {
+		rx_cfg = bmread(dev, RXCFG);
+		rx_cfg |= RxPromiscEnable;
+		bmwrite(dev, RXCFG, rx_cfg);
+	} else {
+		u16 hash_table[4];
+
+		rx_cfg = bmread(dev, RXCFG);
+		rx_cfg &= ~RxPromiscEnable;
+		bmwrite(dev, RXCFG, rx_cfg);
+
+		for(i = 0; i < 4; i++) hash_table[i] = 0;
+
+		netdev_for_each_mc_addr(ha, dev) {
+			crc = ether_crc_le(6, ha->addr);
+			crc >>= 26;
+			hash_table[crc >> 4] |= 1 << (crc & 0xf);
+		}
+		bmwrite(dev, BHASH0, hash_table[0]);
+		bmwrite(dev, BHASH1, hash_table[1]);
+		bmwrite(dev, BHASH2, hash_table[2]);
+		bmwrite(dev, BHASH3, hash_table[3]);
+	}
+}
+#endif /* SUNHME_MULTICAST */
+
+static int miscintcount;
+
+static irqreturn_t bmac_misc_intr(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *) dev_id;
+	unsigned int status = bmread(dev, STATUS);
+	if (miscintcount++ < 10) {
+		XXDEBUG(("bmac_misc_intr\n"));
+	}
+	/* XXDEBUG(("bmac_misc_intr, status=%#08x\n", status)); */
+	/*     bmac_txdma_intr_inner(irq, dev_id); */
+	/*   if (status & FrameReceived) dev->stats.rx_dropped++; */
+	if (status & RxErrorMask) dev->stats.rx_errors++;
+	if (status & RxCRCCntExp) dev->stats.rx_crc_errors++;
+	if (status & RxLenCntExp) dev->stats.rx_length_errors++;
+	if (status & RxOverFlow) dev->stats.rx_over_errors++;
+	if (status & RxAlignCntExp) dev->stats.rx_frame_errors++;
+
+	/*   if (status & FrameSent) dev->stats.tx_dropped++; */
+	if (status & TxErrorMask) dev->stats.tx_errors++;
+	if (status & TxUnderrun) dev->stats.tx_fifo_errors++;
+	if (status & TxNormalCollExp) dev->stats.collisions++;
+	return IRQ_HANDLED;
+}
+
+/*
+ * Procedure for reading EEPROM
+ */
+#define SROMAddressLength	5
+#define DataInOn		0x0008
+#define DataInOff		0x0000
+#define Clk			0x0002
+#define ChipSelect		0x0001
+#define SDIShiftCount		3
+#define SD0ShiftCount		2
+#define	DelayValue		1000	/* number of microseconds */
+#define SROMStartOffset		10	/* this is in words */
+#define SROMReadCount		3	/* number of words to read from SROM */
+#define SROMAddressBits		6
+#define EnetAddressOffset	20
+
+static unsigned char
+bmac_clock_out_bit(struct net_device *dev)
+{
+	unsigned short         data;
+	unsigned short         val;
+
+	bmwrite(dev, SROMCSR, ChipSelect | Clk);
+	udelay(DelayValue);
+
+	data = bmread(dev, SROMCSR);
+	udelay(DelayValue);
+	val = (data >> SD0ShiftCount) & 1;
+
+	bmwrite(dev, SROMCSR, ChipSelect);
+	udelay(DelayValue);
+
+	return val;
+}
+
+static void
+bmac_clock_in_bit(struct net_device *dev, unsigned int val)
+{
+	unsigned short data;
+
+	if (val != 0 && val != 1) return;
+
+	data = (val << SDIShiftCount);
+	bmwrite(dev, SROMCSR, data | ChipSelect  );
+	udelay(DelayValue);
+
+	bmwrite(dev, SROMCSR, data | ChipSelect | Clk );
+	udelay(DelayValue);
+
+	bmwrite(dev, SROMCSR, data | ChipSelect);
+	udelay(DelayValue);
+}
+
+static void
+reset_and_select_srom(struct net_device *dev)
+{
+	/* first reset */
+	bmwrite(dev, SROMCSR, 0);
+	udelay(DelayValue);
+
+	/* send it the read command (110) */
+	bmac_clock_in_bit(dev, 1);
+	bmac_clock_in_bit(dev, 1);
+	bmac_clock_in_bit(dev, 0);
+}
+
+static unsigned short
+read_srom(struct net_device *dev, unsigned int addr, unsigned int addr_len)
+{
+	unsigned short data, val;
+	int i;
+
+	/* send out the address we want to read from */
+	for (i = 0; i < addr_len; i++)	{
+		val = addr >> (addr_len-i-1);
+		bmac_clock_in_bit(dev, val & 1);
+	}
+
+	/* Now read in the 16-bit data */
+	data = 0;
+	for (i = 0; i < 16; i++)	{
+		val = bmac_clock_out_bit(dev);
+		data <<= 1;
+		data |= val;
+	}
+	bmwrite(dev, SROMCSR, 0);
+
+	return data;
+}
+
+/*
+ * It looks like Cogent and SMC use different methods for calculating
+ * checksums. What a pain..
+ */
+
+static int
+bmac_verify_checksum(struct net_device *dev)
+{
+	unsigned short data, storedCS;
+
+	reset_and_select_srom(dev);
+	data = read_srom(dev, 3, SROMAddressBits);
+	storedCS = ((data >> 8) & 0x0ff) | ((data << 8) & 0xff00);
+
+	return 0;
+}
+
+
+static void
+bmac_get_station_address(struct net_device *dev, unsigned char *ea)
+{
+	int i;
+	unsigned short data;
+
+	for (i = 0; i < 6; i++)
+		{
+			reset_and_select_srom(dev);
+			data = read_srom(dev, i + EnetAddressOffset/2, SROMAddressBits);
+			ea[2*i]   = bitrev8(data & 0x0ff);
+			ea[2*i+1] = bitrev8((data >> 8) & 0x0ff);
+		}
+}
+
+static void bmac_reset_and_enable(struct net_device *dev)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	unsigned long flags;
+	struct sk_buff *skb;
+	unsigned char *data;
+
+	spin_lock_irqsave(&bp->lock, flags);
+	bmac_enable_and_reset_chip(dev);
+	bmac_init_tx_ring(bp);
+	bmac_init_rx_ring(bp);
+	bmac_init_chip(dev);
+	bmac_start_chip(dev);
+	bmwrite(dev, INTDISABLE, EnableNormal);
+	bp->sleeping = 0;
+
+	/*
+	 * It seems that the bmac can't receive until it's transmitted
+	 * a packet.  So we give it a dummy packet to transmit.
+	 */
+	skb = dev_alloc_skb(ETHERMINPACKET);
+	if (skb != NULL) {
+		data = skb_put(skb, ETHERMINPACKET);
+		memset(data, 0, ETHERMINPACKET);
+		memcpy(data, dev->dev_addr, 6);
+		memcpy(data+6, dev->dev_addr, 6);
+		bmac_transmit_packet(skb, dev);
+	}
+	spin_unlock_irqrestore(&bp->lock, flags);
+}
+
+static const struct ethtool_ops bmac_ethtool_ops = {
+	.get_link		= ethtool_op_get_link,
+};
+
+static const struct net_device_ops bmac_netdev_ops = {
+	.ndo_open		= bmac_open,
+	.ndo_stop		= bmac_close,
+	.ndo_start_xmit		= bmac_output,
+	.ndo_set_multicast_list	= bmac_set_multicast,
+	.ndo_set_mac_address	= bmac_set_address,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_validate_addr	= eth_validate_addr,
+};
+
+static int __devinit bmac_probe(struct macio_dev *mdev, const struct of_device_id *match)
+{
+	int j, rev, ret;
+	struct bmac_data *bp;
+	const unsigned char *prop_addr;
+	unsigned char addr[6];
+	struct net_device *dev;
+	int is_bmac_plus = ((int)match->data) != 0;
+
+	if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) {
+		printk(KERN_ERR "BMAC: can't use, need 3 addrs and 3 intrs\n");
+		return -ENODEV;
+	}
+	prop_addr = of_get_property(macio_get_of_node(mdev),
+			"mac-address", NULL);
+	if (prop_addr == NULL) {
+		prop_addr = of_get_property(macio_get_of_node(mdev),
+				"local-mac-address", NULL);
+		if (prop_addr == NULL) {
+			printk(KERN_ERR "BMAC: Can't get mac-address\n");
+			return -ENODEV;
+		}
+	}
+	memcpy(addr, prop_addr, sizeof(addr));
+
+	dev = alloc_etherdev(PRIV_BYTES);
+	if (!dev) {
+		printk(KERN_ERR "BMAC: alloc_etherdev failed, out of memory\n");
+		return -ENOMEM;
+	}
+
+	bp = netdev_priv(dev);
+	SET_NETDEV_DEV(dev, &mdev->ofdev.dev);
+	macio_set_drvdata(mdev, dev);
+
+	bp->mdev = mdev;
+	spin_lock_init(&bp->lock);
+
+	if (macio_request_resources(mdev, "bmac")) {
+		printk(KERN_ERR "BMAC: can't request IO resource !\n");
+		goto out_free;
+	}
+
+	dev->base_addr = (unsigned long)
+		ioremap(macio_resource_start(mdev, 0), macio_resource_len(mdev, 0));
+	if (dev->base_addr == 0)
+		goto out_release;
+
+	dev->irq = macio_irq(mdev, 0);
+
+	bmac_enable_and_reset_chip(dev);
+	bmwrite(dev, INTDISABLE, DisableAll);
+
+	rev = addr[0] == 0 && addr[1] == 0xA0;
+	for (j = 0; j < 6; ++j)
+		dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
+
+	/* Enable chip without interrupts for now */
+	bmac_enable_and_reset_chip(dev);
+	bmwrite(dev, INTDISABLE, DisableAll);
+
+	dev->netdev_ops = &bmac_netdev_ops;
+	dev->ethtool_ops = &bmac_ethtool_ops;
+
+	bmac_get_station_address(dev, addr);
+	if (bmac_verify_checksum(dev) != 0)
+		goto err_out_iounmap;
+
+	bp->is_bmac_plus = is_bmac_plus;
+	bp->tx_dma = ioremap(macio_resource_start(mdev, 1), macio_resource_len(mdev, 1));
+	if (!bp->tx_dma)
+		goto err_out_iounmap;
+	bp->tx_dma_intr = macio_irq(mdev, 1);
+	bp->rx_dma = ioremap(macio_resource_start(mdev, 2), macio_resource_len(mdev, 2));
+	if (!bp->rx_dma)
+		goto err_out_iounmap_tx;
+	bp->rx_dma_intr = macio_irq(mdev, 2);
+
+	bp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(bp + 1);
+	bp->rx_cmds = bp->tx_cmds + N_TX_RING + 1;
+
+	bp->queue = (struct sk_buff_head *)(bp->rx_cmds + N_RX_RING + 1);
+	skb_queue_head_init(bp->queue);
+
+	init_timer(&bp->tx_timeout);
+
+	ret = request_irq(dev->irq, bmac_misc_intr, 0, "BMAC-misc", dev);
+	if (ret) {
+		printk(KERN_ERR "BMAC: can't get irq %d\n", dev->irq);
+		goto err_out_iounmap_rx;
+	}
+	ret = request_irq(bp->tx_dma_intr, bmac_txdma_intr, 0, "BMAC-txdma", dev);
+	if (ret) {
+		printk(KERN_ERR "BMAC: can't get irq %d\n", bp->tx_dma_intr);
+		goto err_out_irq0;
+	}
+	ret = request_irq(bp->rx_dma_intr, bmac_rxdma_intr, 0, "BMAC-rxdma", dev);
+	if (ret) {
+		printk(KERN_ERR "BMAC: can't get irq %d\n", bp->rx_dma_intr);
+		goto err_out_irq1;
+	}
+
+	/* Mask chip interrupts and disable chip, will be
+	 * re-enabled on open()
+	 */
+	disable_irq(dev->irq);
+	pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
+
+	if (register_netdev(dev) != 0) {
+		printk(KERN_ERR "BMAC: Ethernet registration failed\n");
+		goto err_out_irq2;
+	}
+
+	printk(KERN_INFO "%s: BMAC%s at %pM",
+	       dev->name, (is_bmac_plus ? "+" : ""), dev->dev_addr);
+	XXDEBUG((", base_addr=%#0lx", dev->base_addr));
+	printk("\n");
+
+	return 0;
+
+err_out_irq2:
+	free_irq(bp->rx_dma_intr, dev);
+err_out_irq1:
+	free_irq(bp->tx_dma_intr, dev);
+err_out_irq0:
+	free_irq(dev->irq, dev);
+err_out_iounmap_rx:
+	iounmap(bp->rx_dma);
+err_out_iounmap_tx:
+	iounmap(bp->tx_dma);
+err_out_iounmap:
+	iounmap((void __iomem *)dev->base_addr);
+out_release:
+	macio_release_resources(mdev);
+out_free:
+	pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
+	free_netdev(dev);
+
+	return -ENODEV;
+}
+
+static int bmac_open(struct net_device *dev)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	/* XXDEBUG(("bmac: enter open\n")); */
+	/* reset the chip */
+	bp->opened = 1;
+	bmac_reset_and_enable(dev);
+	enable_irq(dev->irq);
+	return 0;
+}
+
+static int bmac_close(struct net_device *dev)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
+	volatile struct dbdma_regs __iomem *td = bp->tx_dma;
+	unsigned short config;
+	int i;
+
+	bp->sleeping = 1;
+
+	/* disable rx and tx */
+	config = bmread(dev, RXCFG);
+	bmwrite(dev, RXCFG, (config & ~RxMACEnable));
+
+	config = bmread(dev, TXCFG);
+	bmwrite(dev, TXCFG, (config & ~TxMACEnable));
+
+	bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */
+
+	/* disable rx and tx dma */
+	st_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE));	/* clear run bit */
+	st_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE));	/* clear run bit */
+
+	/* free some skb's */
+	XXDEBUG(("bmac: free rx bufs\n"));
+	for (i=0; i<N_RX_RING; i++) {
+		if (bp->rx_bufs[i] != NULL) {
+			dev_kfree_skb(bp->rx_bufs[i]);
+			bp->rx_bufs[i] = NULL;
+		}
+	}
+	XXDEBUG(("bmac: free tx bufs\n"));
+	for (i = 0; i<N_TX_RING; i++) {
+		if (bp->tx_bufs[i] != NULL) {
+			dev_kfree_skb(bp->tx_bufs[i]);
+			bp->tx_bufs[i] = NULL;
+		}
+	}
+	XXDEBUG(("bmac: all bufs freed\n"));
+
+	bp->opened = 0;
+	disable_irq(dev->irq);
+	pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0);
+
+	return 0;
+}
+
+static void
+bmac_start(struct net_device *dev)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	int i;
+	struct sk_buff *skb;
+	unsigned long flags;
+
+	if (bp->sleeping)
+		return;
+
+	spin_lock_irqsave(&bp->lock, flags);
+	while (1) {
+		i = bp->tx_fill + 1;
+		if (i >= N_TX_RING)
+			i = 0;
+		if (i == bp->tx_empty)
+			break;
+		skb = skb_dequeue(bp->queue);
+		if (skb == NULL)
+			break;
+		bmac_transmit_packet(skb, dev);
+	}
+	spin_unlock_irqrestore(&bp->lock, flags);
+}
+
+static int
+bmac_output(struct sk_buff *skb, struct net_device *dev)
+{
+	struct bmac_data *bp = netdev_priv(dev);
+	skb_queue_tail(bp->queue, skb);
+	bmac_start(dev);
+	return NETDEV_TX_OK;
+}
+
+static void bmac_tx_timeout(unsigned long data)
+{
+	struct net_device *dev = (struct net_device *) data;
+	struct bmac_data *bp = netdev_priv(dev);
+	volatile struct dbdma_regs __iomem *td = bp->tx_dma;
+	volatile struct dbdma_regs __iomem *rd = bp->rx_dma;
+	volatile struct dbdma_cmd *cp;
+	unsigned long flags;
+	unsigned short config, oldConfig;
+	int i;
+
+	XXDEBUG(("bmac: tx_timeout called\n"));
+	spin_lock_irqsave(&bp->lock, flags);
+	bp->timeout_active = 0;
+
+	/* update various counters */
+/*     	bmac_handle_misc_intrs(bp, 0); */
+
+	cp = &bp->tx_cmds[bp->tx_empty];
+/*	XXDEBUG((KERN_DEBUG "bmac: tx dmastat=%x %x runt=%d pr=%x fs=%x fc=%x\n", */
+/* 	   ld_le32(&td->status), ld_le16(&cp->xfer_status), bp->tx_bad_runt, */
+/* 	   mb->pr, mb->xmtfs, mb->fifofc)); */
+
+	/* turn off both tx and rx and reset the chip */
+	config = bmread(dev, RXCFG);
+	bmwrite(dev, RXCFG, (config & ~RxMACEnable));
+	config = bmread(dev, TXCFG);
+	bmwrite(dev, TXCFG, (config & ~TxMACEnable));
+	out_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD));
+	printk(KERN_ERR "bmac: transmit timeout - resetting\n");
+	bmac_enable_and_reset_chip(dev);
+
+	/* restart rx dma */
+	cp = bus_to_virt(ld_le32(&rd->cmdptr));
+	out_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD));
+	out_le16(&cp->xfer_status, 0);
+	out_le32(&rd->cmdptr, virt_to_bus(cp));
+	out_le32(&rd->control, DBDMA_SET(RUN|WAKE));
+
+	/* fix up the transmit side */
+	XXDEBUG((KERN_DEBUG "bmac: tx empty=%d fill=%d fullup=%d\n",
+		 bp->tx_empty, bp->tx_fill, bp->tx_fullup));
+	i = bp->tx_empty;
+	++dev->stats.tx_errors;
+	if (i != bp->tx_fill) {
+		dev_kfree_skb(bp->tx_bufs[i]);
+		bp->tx_bufs[i] = NULL;
+		if (++i >= N_TX_RING) i = 0;
+		bp->tx_empty = i;
+	}
+	bp->tx_fullup = 0;
+	netif_wake_queue(dev);
+	if (i != bp->tx_fill) {
+		cp = &bp->tx_cmds[i];
+		out_le16(&cp->xfer_status, 0);
+		out_le16(&cp->command, OUTPUT_LAST);
+		out_le32(&td->cmdptr, virt_to_bus(cp));
+		out_le32(&td->control, DBDMA_SET(RUN));
+		/* 	bmac_set_timeout(dev); */
+		XXDEBUG((KERN_DEBUG "bmac: starting %d\n", i));
+	}
+
+	/* turn it back on */
+	oldConfig = bmread(dev, RXCFG);
+	bmwrite(dev, RXCFG, oldConfig | RxMACEnable );
+	oldConfig = bmread(dev, TXCFG);
+	bmwrite(dev, TXCFG, oldConfig | TxMACEnable );
+
+	spin_unlock_irqrestore(&bp->lock, flags);
+}
+
+#if 0
+static void dump_dbdma(volatile struct dbdma_cmd *cp,int count)
+{
+	int i,*ip;
+
+	for (i=0;i< count;i++) {
+		ip = (int*)(cp+i);
+
+		printk("dbdma req 0x%x addr 0x%x baddr 0x%x xfer/res 0x%x\n",
+		       ld_le32(ip+0),
+		       ld_le32(ip+1),
+		       ld_le32(ip+2),
+		       ld_le32(ip+3));
+	}
+
+}
+#endif
+
+#if 0
+static int
+bmac_proc_info(char *buffer, char **start, off_t offset, int length)
+{
+	int len = 0;
+	off_t pos   = 0;
+	off_t begin = 0;
+	int i;
+
+	if (bmac_devs == NULL)
+		return -ENOSYS;
+
+	len += sprintf(buffer, "BMAC counters & registers\n");
+
+	for (i = 0; i<N_REG_ENTRIES; i++) {
+		len += sprintf(buffer + len, "%s: %#08x\n",
+			       reg_entries[i].name,
+			       bmread(bmac_devs, reg_entries[i].reg_offset));
+		pos = begin + len;
+
+		if (pos < offset) {
+			len = 0;
+			begin = pos;
+		}
+
+		if (pos > offset+length) break;
+	}
+
+	*start = buffer + (offset - begin);
+	len -= (offset - begin);
+
+	if (len > length) len = length;
+
+	return len;
+}
+#endif
+
+static int __devexit bmac_remove(struct macio_dev *mdev)
+{
+	struct net_device *dev = macio_get_drvdata(mdev);
+	struct bmac_data *bp = netdev_priv(dev);
+
+	unregister_netdev(dev);
+
+       	free_irq(dev->irq, dev);
+	free_irq(bp->tx_dma_intr, dev);
+	free_irq(bp->rx_dma_intr, dev);
+
+	iounmap((void __iomem *)dev->base_addr);
+	iounmap(bp->tx_dma);
+	iounmap(bp->rx_dma);
+
+	macio_release_resources(mdev);
+
+	free_netdev(dev);
+
+	return 0;
+}
+
+static struct of_device_id bmac_match[] =
+{
+	{
+	.name 		= "bmac",
+	.data		= (void *)0,
+	},
+	{
+	.type		= "network",
+	.compatible	= "bmac+",
+	.data		= (void *)1,
+	},
+	{},
+};
+MODULE_DEVICE_TABLE (of, bmac_match);
+
+static struct macio_driver bmac_driver =
+{
+	.driver = {
+		.name 		= "bmac",
+		.owner		= THIS_MODULE,
+		.of_match_table	= bmac_match,
+	},
+	.probe		= bmac_probe,
+	.remove		= bmac_remove,
+#ifdef CONFIG_PM
+	.suspend	= bmac_suspend,
+	.resume		= bmac_resume,
+#endif
+};
+
+
+static int __init bmac_init(void)
+{
+	if (bmac_emergency_rxbuf == NULL) {
+		bmac_emergency_rxbuf = kmalloc(RX_BUFLEN, GFP_KERNEL);
+		if (bmac_emergency_rxbuf == NULL) {
+			printk(KERN_ERR "BMAC: can't allocate emergency RX buffer\n");
+			return -ENOMEM;
+		}
+	}
+
+	return macio_register_driver(&bmac_driver);
+}
+
+static void __exit bmac_exit(void)
+{
+	macio_unregister_driver(&bmac_driver);
+
+	kfree(bmac_emergency_rxbuf);
+	bmac_emergency_rxbuf = NULL;
+}
+
+MODULE_AUTHOR("Randy Gobbel/Paul Mackerras");
+MODULE_DESCRIPTION("PowerMac BMAC ethernet driver.");
+MODULE_LICENSE("GPL");
+
+module_init(bmac_init);
+module_exit(bmac_exit);