i825xx: Move the Intel 82586/82593/82596 based drivers

Move the drivers that use the i82586/i82593/i82596 chipsets into
drivers/net/ethernet/i825xx/ and make the necessary Kconfig and
Makefile changes.  There were 4 3Com drivers which were initially
moved into 3com/, which now reside in i825xx since they all used
the i82586 chip.

CC: Philip Blundell <philb@gnu.org>
CC: Russell King <linux@arm.linux.org.uk>
CC: <aris@cathedrallabs.org>
CC: Donald Becker <becker@scyld.com>
CC: Chris Beauregard <cpbeaure@undergrad.math.uwaterloo.ca>
CC: Richard Procter <rnp@paradise.net.nz>
CC: Andries Brouwer <aeb@cwi.nl>
CC: "M.Hipp" <hippm@informatik.uni-tuebingen.de>
CC: Richard Hirst <richard@sleepie.demon.co.uk>
CC: Sam Creasey <sammy@oh.verio.com>
CC: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 1632 insertions, 0 deletions

diff --git a/drivers/net/ethernet/i825xx/82596.c b/drivers/net/ethernet/i825xx/82596.c
new file mode 100644
index 000000000000..be1f1970c842
--- /dev/null
+++ b/drivers/net/ethernet/i825xx/82596.c
@@ -0,0 +1,1632 @@
+/* 82596.c: A generic 82596 ethernet driver for linux. */
+/*
+   Based on Apricot.c
+   Written 1994 by Mark Evans.
+   This driver is for the Apricot 82596 bus-master interface
+
+   Modularised 12/94 Mark Evans
+
+
+   Modified to support the 82596 ethernet chips on 680x0 VME boards.
+   by Richard Hirst <richard@sleepie.demon.co.uk>
+   Renamed to be 82596.c
+
+   980825:  Changed to receive directly in to sk_buffs which are
+   allocated at open() time.  Eliminates copy on incoming frames
+   (small ones are still copied).  Shared data now held in a
+   non-cached page, so we can run on 68060 in copyback mode.
+
+   TBD:
+   * look at deferring rx frames rather than discarding (as per tulip)
+   * handle tx ring full as per tulip
+   * performance test to tune rx_copybreak
+
+   Most of my modifications relate to the braindead big-endian
+   implementation by Intel.  When the i596 is operating in
+   'big-endian' mode, it thinks a 32 bit value of 0x12345678
+   should be stored as 0x56781234.  This is a real pain, when
+   you have linked lists which are shared by the 680x0 and the
+   i596.
+
+   Driver skeleton
+   Written 1993 by Donald Becker.
+   Copyright 1993 United States Government as represented by the Director,
+   National Security Agency. This software may only be used and distributed
+   according to the terms of the GNU General Public License as modified by SRC,
+   incorporated herein by reference.
+
+   The author may be reached as becker@scyld.com, or C/O
+   Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
+
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/gfp.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/pgtable.h>
+#include <asm/cacheflush.h>
+
+static char version[] __initdata =
+	"82596.c $Revision: 1.5 $\n";
+
+#define DRV_NAME	"82596"
+
+/* DEBUG flags
+ */
+
+#define DEB_INIT	0x0001
+#define DEB_PROBE	0x0002
+#define DEB_SERIOUS	0x0004
+#define DEB_ERRORS	0x0008
+#define DEB_MULTI	0x0010
+#define DEB_TDR		0x0020
+#define DEB_OPEN	0x0040
+#define DEB_RESET	0x0080
+#define DEB_ADDCMD	0x0100
+#define DEB_STATUS	0x0200
+#define DEB_STARTTX	0x0400
+#define DEB_RXADDR	0x0800
+#define DEB_TXADDR	0x1000
+#define DEB_RXFRAME	0x2000
+#define DEB_INTS	0x4000
+#define DEB_STRUCT	0x8000
+#define DEB_ANY		0xffff
+
+
+#define DEB(x,y)	if (i596_debug & (x)) y
+
+
+#if defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
+#define ENABLE_MVME16x_NET
+#endif
+#if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
+#define ENABLE_BVME6000_NET
+#endif
+#if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE)
+#define ENABLE_APRICOT
+#endif
+
+#ifdef ENABLE_MVME16x_NET
+#include <asm/mvme16xhw.h>
+#endif
+#ifdef ENABLE_BVME6000_NET
+#include <asm/bvme6000hw.h>
+#endif
+
+/*
+ * Define various macros for Channel Attention, word swapping etc., dependent
+ * on architecture.  MVME and BVME are 680x0 based, otherwise it is Intel.
+ */
+
+#ifdef __mc68000__
+#define WSWAPrfd(x)  ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPrbd(x)  ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPscb(x)  ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPcmd(x)  ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPtbd(x)  ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPchar(x) ((char *)            (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define ISCP_BUSY	0x00010000
+#define MACH_IS_APRICOT	0
+#else
+#define WSWAPrfd(x)     ((struct i596_rfd *)((long)x))
+#define WSWAPrbd(x)     ((struct i596_rbd *)((long)x))
+#define WSWAPiscp(x)    ((struct i596_iscp *)((long)x))
+#define WSWAPscb(x)     ((struct i596_scb *)((long)x))
+#define WSWAPcmd(x)     ((struct i596_cmd *)((long)x))
+#define WSWAPtbd(x)     ((struct i596_tbd *)((long)x))
+#define WSWAPchar(x)    ((char *)((long)x))
+#define ISCP_BUSY	0x0001
+#define MACH_IS_APRICOT	1
+#endif
+
+/*
+ * The MPU_PORT command allows direct access to the 82596. With PORT access
+ * the following commands are available (p5-18). The 32-bit port command
+ * must be word-swapped with the most significant word written first.
+ * This only applies to VME boards.
+ */
+#define PORT_RESET		0x00	/* reset 82596 */
+#define PORT_SELFTEST		0x01	/* selftest */
+#define PORT_ALTSCP		0x02	/* alternate SCB address */
+#define PORT_ALTDUMP		0x03	/* Alternate DUMP address */
+
+static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
+
+MODULE_AUTHOR("Richard Hirst");
+MODULE_DESCRIPTION("i82596 driver");
+MODULE_LICENSE("GPL");
+
+module_param(i596_debug, int, 0);
+MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
+
+
+/* Copy frames shorter than rx_copybreak, otherwise pass on up in
+ * a full sized sk_buff.  Value of 100 stolen from tulip.c (!alpha).
+ */
+static int rx_copybreak = 100;
+
+#define PKT_BUF_SZ	1536
+#define MAX_MC_CNT	64
+
+#define I596_TOTAL_SIZE 17
+
+#define I596_NULL ((void *)0xffffffff)
+
+#define CMD_EOL		0x8000	/* The last command of the list, stop. */
+#define CMD_SUSP	0x4000	/* Suspend after doing cmd. */
+#define CMD_INTR	0x2000	/* Interrupt after doing cmd. */
+
+#define CMD_FLEX	0x0008	/* Enable flexible memory model */
+
+enum commands {
+	CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
+	CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
+};
+
+#define STAT_C		0x8000	/* Set to 0 after execution */
+#define STAT_B		0x4000	/* Command being executed */
+#define STAT_OK		0x2000	/* Command executed ok */
+#define STAT_A		0x1000	/* Command aborted */
+
+#define	 CUC_START	0x0100
+#define	 CUC_RESUME	0x0200
+#define	 CUC_SUSPEND    0x0300
+#define	 CUC_ABORT	0x0400
+#define	 RX_START	0x0010
+#define	 RX_RESUME	0x0020
+#define	 RX_SUSPEND	0x0030
+#define	 RX_ABORT	0x0040
+
+#define TX_TIMEOUT	(HZ/20)
+
+
+struct i596_reg {
+	unsigned short porthi;
+	unsigned short portlo;
+	unsigned long ca;
+};
+
+#define EOF		0x8000
+#define SIZE_MASK	0x3fff
+
+struct i596_tbd {
+	unsigned short size;
+	unsigned short pad;
+	struct i596_tbd *next;
+	char *data;
+};
+
+/* The command structure has two 'next' pointers; v_next is the address of
+ * the next command as seen by the CPU, b_next is the address of the next
+ * command as seen by the 82596.  The b_next pointer, as used by the 82596
+ * always references the status field of the next command, rather than the
+ * v_next field, because the 82596 is unaware of v_next.  It may seem more
+ * logical to put v_next at the end of the structure, but we cannot do that
+ * because the 82596 expects other fields to be there, depending on command
+ * type.
+ */
+
+struct i596_cmd {
+	struct i596_cmd *v_next;	/* Address from CPUs viewpoint */
+	unsigned short status;
+	unsigned short command;
+	struct i596_cmd *b_next;	/* Address from i596 viewpoint */
+};
+
+struct tx_cmd {
+	struct i596_cmd cmd;
+	struct i596_tbd *tbd;
+	unsigned short size;
+	unsigned short pad;
+	struct sk_buff *skb;	/* So we can free it after tx */
+};
+
+struct tdr_cmd {
+	struct i596_cmd cmd;
+	unsigned short status;
+	unsigned short pad;
+};
+
+struct mc_cmd {
+	struct i596_cmd cmd;
+	short mc_cnt;
+	char mc_addrs[MAX_MC_CNT*6];
+};
+
+struct sa_cmd {
+	struct i596_cmd cmd;
+	char eth_addr[8];
+};
+
+struct cf_cmd {
+	struct i596_cmd cmd;
+	char i596_config[16];
+};
+
+struct i596_rfd {
+	unsigned short stat;
+	unsigned short cmd;
+	struct i596_rfd *b_next;	/* Address from i596 viewpoint */
+	struct i596_rbd *rbd;
+	unsigned short count;
+	unsigned short size;
+	struct i596_rfd *v_next;	/* Address from CPUs viewpoint */
+	struct i596_rfd *v_prev;
+};
+
+struct i596_rbd {
+    unsigned short count;
+    unsigned short zero1;
+    struct i596_rbd *b_next;
+    unsigned char *b_data;		/* Address from i596 viewpoint */
+    unsigned short size;
+    unsigned short zero2;
+    struct sk_buff *skb;
+    struct i596_rbd *v_next;
+    struct i596_rbd *b_addr;		/* This rbd addr from i596 view */
+    unsigned char *v_data;		/* Address from CPUs viewpoint */
+};
+
+#define TX_RING_SIZE 64
+#define RX_RING_SIZE 16
+
+struct i596_scb {
+	unsigned short status;
+	unsigned short command;
+	struct i596_cmd *cmd;
+	struct i596_rfd *rfd;
+	unsigned long crc_err;
+	unsigned long align_err;
+	unsigned long resource_err;
+	unsigned long over_err;
+	unsigned long rcvdt_err;
+	unsigned long short_err;
+	unsigned short t_on;
+	unsigned short t_off;
+};
+
+struct i596_iscp {
+	unsigned long stat;
+	struct i596_scb *scb;
+};
+
+struct i596_scp {
+	unsigned long sysbus;
+	unsigned long pad;
+	struct i596_iscp *iscp;
+};
+
+struct i596_private {
+	volatile struct i596_scp scp;
+	volatile struct i596_iscp iscp;
+	volatile struct i596_scb scb;
+	struct sa_cmd sa_cmd;
+	struct cf_cmd cf_cmd;
+	struct tdr_cmd tdr_cmd;
+	struct mc_cmd mc_cmd;
+	unsigned long stat;
+	int last_restart __attribute__((aligned(4)));
+	struct i596_rfd *rfd_head;
+	struct i596_rbd *rbd_head;
+	struct i596_cmd *cmd_tail;
+	struct i596_cmd *cmd_head;
+	int cmd_backlog;
+	unsigned long last_cmd;
+	struct i596_rfd rfds[RX_RING_SIZE];
+	struct i596_rbd rbds[RX_RING_SIZE];
+	struct tx_cmd tx_cmds[TX_RING_SIZE];
+	struct i596_tbd tbds[TX_RING_SIZE];
+	int next_tx_cmd;
+	spinlock_t lock;
+};
+
+static char init_setup[] =
+{
+	0x8E,			/* length, prefetch on */
+	0xC8,			/* fifo to 8, monitor off */
+#ifdef CONFIG_VME
+	0xc0,			/* don't save bad frames */
+#else
+	0x80,			/* don't save bad frames */
+#endif
+	0x2E,			/* No source address insertion, 8 byte preamble */
+	0x00,			/* priority and backoff defaults */
+	0x60,			/* interframe spacing */
+	0x00,			/* slot time LSB */
+	0xf2,			/* slot time and retries */
+	0x00,			/* promiscuous mode */
+	0x00,			/* collision detect */
+	0x40,			/* minimum frame length */
+	0xff,
+	0x00,
+	0x7f /*  *multi IA */ };
+
+static int i596_open(struct net_device *dev);
+static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static irqreturn_t i596_interrupt(int irq, void *dev_id);
+static int i596_close(struct net_device *dev);
+static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
+static void i596_tx_timeout (struct net_device *dev);
+static void print_eth(unsigned char *buf, char *str);
+static void set_multicast_list(struct net_device *dev);
+
+static int rx_ring_size = RX_RING_SIZE;
+static int ticks_limit = 25;
+static int max_cmd_backlog = TX_RING_SIZE-1;
+
+
+static inline void CA(struct net_device *dev)
+{
+#ifdef ENABLE_MVME16x_NET
+	if (MACH_IS_MVME16x) {
+		((struct i596_reg *) dev->base_addr)->ca = 1;
+	}
+#endif
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000) {
+		volatile u32 i;
+
+		i = *(volatile u32 *) (dev->base_addr);
+	}
+#endif
+#ifdef ENABLE_APRICOT
+	if (MACH_IS_APRICOT) {
+		outw(0, (short) (dev->base_addr) + 4);
+	}
+#endif
+}
+
+
+static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
+{
+#ifdef ENABLE_MVME16x_NET
+	if (MACH_IS_MVME16x) {
+		struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
+		p->porthi = ((c) | (u32) (x)) & 0xffff;
+		p->portlo = ((c) | (u32) (x)) >> 16;
+	}
+#endif
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000) {
+		u32 v = (u32) (c) | (u32) (x);
+		v = ((u32) (v) << 16) | ((u32) (v) >> 16);
+		*(volatile u32 *) dev->base_addr = v;
+		udelay(1);
+		*(volatile u32 *) dev->base_addr = v;
+	}
+#endif
+}
+
+
+static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
+{
+	while (--delcnt && lp->iscp.stat)
+		udelay(10);
+	if (!delcnt) {
+		printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
+		     dev->name, str, lp->scb.status, lp->scb.command);
+		return -1;
+	}
+	else
+		return 0;
+}
+
+
+static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
+{
+	while (--delcnt && lp->scb.command)
+		udelay(10);
+	if (!delcnt) {
+		printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
+		     dev->name, str, lp->scb.status, lp->scb.command);
+		return -1;
+	}
+	else
+		return 0;
+}
+
+
+static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
+{
+	volatile struct i596_cmd *c = cmd;
+
+	while (--delcnt && c->command)
+		udelay(10);
+	if (!delcnt) {
+		printk(KERN_ERR "%s: %s.\n", dev->name, str);
+		return -1;
+	}
+	else
+		return 0;
+}
+
+
+static void i596_display_data(struct net_device *dev)
+{
+	struct i596_private *lp = dev->ml_priv;
+	struct i596_cmd *cmd;
+	struct i596_rfd *rfd;
+	struct i596_rbd *rbd;
+
+	printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
+	       &lp->scp, lp->scp.sysbus, lp->scp.iscp);
+	printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
+	       &lp->iscp, lp->iscp.stat, lp->iscp.scb);
+	printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
+		" .cmd = %p, .rfd = %p\n",
+	       &lp->scb, lp->scb.status, lp->scb.command,
+		lp->scb.cmd, lp->scb.rfd);
+	printk(KERN_ERR "   errors: crc %lx, align %lx, resource %lx,"
+               " over %lx, rcvdt %lx, short %lx\n",
+		lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
+		lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
+	cmd = lp->cmd_head;
+	while (cmd != I596_NULL) {
+		printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
+		  cmd, cmd->status, cmd->command, cmd->b_next);
+		cmd = cmd->v_next;
+	}
+	rfd = lp->rfd_head;
+	printk(KERN_ERR "rfd_head = %p\n", rfd);
+	do {
+		printk(KERN_ERR "   %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
+                        " count %04x\n",
+			rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
+			rfd->count);
+		rfd = rfd->v_next;
+	} while (rfd != lp->rfd_head);
+	rbd = lp->rbd_head;
+	printk(KERN_ERR "rbd_head = %p\n", rbd);
+	do {
+		printk(KERN_ERR "   %p .count %04x, b_next %p, b_data %p, size %04x\n",
+			rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
+		rbd = rbd->v_next;
+	} while (rbd != lp->rbd_head);
+}
+
+
+#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
+static irqreturn_t i596_error(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+#ifdef ENABLE_MVME16x_NET
+	if (MACH_IS_MVME16x) {
+		volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
+
+		pcc2[0x28] = 1;
+		pcc2[0x2b] = 0x1d;
+	}
+#endif
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000) {
+		volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
+
+		*ethirq = 1;
+		*ethirq = 3;
+	}
+#endif
+	printk(KERN_ERR "%s: Error interrupt\n", dev->name);
+	i596_display_data(dev);
+	return IRQ_HANDLED;
+}
+#endif
+
+static inline void remove_rx_bufs(struct net_device *dev)
+{
+	struct i596_private *lp = dev->ml_priv;
+	struct i596_rbd *rbd;
+	int i;
+
+	for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
+		if (rbd->skb == NULL)
+			break;
+		dev_kfree_skb(rbd->skb);
+		rbd->skb = NULL;
+	}
+}
+
+static inline int init_rx_bufs(struct net_device *dev)
+{
+	struct i596_private *lp = dev->ml_priv;
+	int i;
+	struct i596_rfd *rfd;
+	struct i596_rbd *rbd;
+
+	/* First build the Receive Buffer Descriptor List */
+
+	for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
+		struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ);
+
+		if (skb == NULL) {
+			remove_rx_bufs(dev);
+			return -ENOMEM;
+		}
+
+		skb->dev = dev;
+		rbd->v_next = rbd+1;
+		rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
+		rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
+		rbd->skb = skb;
+		rbd->v_data = skb->data;
+		rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
+		rbd->size = PKT_BUF_SZ;
+#ifdef __mc68000__
+		cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
+#endif
+	}
+	lp->rbd_head = lp->rbds;
+	rbd = lp->rbds + rx_ring_size - 1;
+	rbd->v_next = lp->rbds;
+	rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
+
+	/* Now build the Receive Frame Descriptor List */
+
+	for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
+		rfd->rbd = I596_NULL;
+		rfd->v_next = rfd+1;
+		rfd->v_prev = rfd-1;
+		rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
+		rfd->cmd = CMD_FLEX;
+	}
+	lp->rfd_head = lp->rfds;
+	lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
+	rfd = lp->rfds;
+	rfd->rbd = lp->rbd_head;
+	rfd->v_prev = lp->rfds + rx_ring_size - 1;
+	rfd = lp->rfds + rx_ring_size - 1;
+	rfd->v_next = lp->rfds;
+	rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
+	rfd->cmd = CMD_EOL|CMD_FLEX;
+
+	return 0;
+}
+
+
+static void rebuild_rx_bufs(struct net_device *dev)
+{
+	struct i596_private *lp = dev->ml_priv;
+	int i;
+
+	/* Ensure rx frame/buffer descriptors are tidy */
+
+	for (i = 0; i < rx_ring_size; i++) {
+		lp->rfds[i].rbd = I596_NULL;
+		lp->rfds[i].cmd = CMD_FLEX;
+	}
+	lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
+	lp->rfd_head = lp->rfds;
+	lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
+	lp->rbd_head = lp->rbds;
+	lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
+}
+
+
+static int init_i596_mem(struct net_device *dev)
+{
+	struct i596_private *lp = dev->ml_priv;
+#if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT)
+	short ioaddr = dev->base_addr;
+#endif
+	unsigned long flags;
+
+	MPU_PORT(dev, PORT_RESET, NULL);
+
+	udelay(100);		/* Wait 100us - seems to help */
+
+#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
+#ifdef ENABLE_MVME16x_NET
+	if (MACH_IS_MVME16x) {
+		volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
+
+		/* Disable all ints for now */
+		pcc2[0x28] = 1;
+		pcc2[0x2a] = 0x48;
+		/* Following disables snooping.  Snooping is not required
+		 * as we make appropriate use of non-cached pages for
+		 * shared data, and cache_push/cache_clear.
+		 */
+		pcc2[0x2b] = 0x08;
+	}
+#endif
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000) {
+		volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
+
+		*ethirq = 1;
+	}
+#endif
+
+	/* change the scp address */
+
+	MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
+
+#elif defined(ENABLE_APRICOT)
+
+	{
+		u32 scp = virt_to_bus(&lp->scp);
+
+		/* change the scp address */
+		outw(0, ioaddr);
+		outw(0, ioaddr);
+		outb(4, ioaddr + 0xf);
+		outw(scp | 2, ioaddr);
+		outw(scp >> 16, ioaddr);
+	}
+#endif
+
+	lp->last_cmd = jiffies;
+
+#ifdef ENABLE_MVME16x_NET
+	if (MACH_IS_MVME16x)
+		lp->scp.sysbus = 0x00000054;
+#endif
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000)
+		lp->scp.sysbus = 0x0000004c;
+#endif
+#ifdef ENABLE_APRICOT
+	if (MACH_IS_APRICOT)
+		lp->scp.sysbus = 0x00440000;
+#endif
+
+	lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
+	lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
+	lp->iscp.stat = ISCP_BUSY;
+	lp->cmd_backlog = 0;
+
+	lp->cmd_head = lp->scb.cmd = I596_NULL;
+
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000) {
+		lp->scb.t_on  = 7 * 25;
+		lp->scb.t_off = 1 * 25;
+	}
+#endif
+
+	DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
+
+#if defined(ENABLE_APRICOT)
+	(void) inb(ioaddr + 0x10);
+	outb(4, ioaddr + 0xf);
+#endif
+	CA(dev);
+
+	if (wait_istat(dev,lp,1000,"initialization timed out"))
+		goto failed;
+	DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
+
+	/* Ensure rx frame/buffer descriptors are tidy */
+	rebuild_rx_bufs(dev);
+	lp->scb.command = 0;
+
+#ifdef ENABLE_MVME16x_NET
+	if (MACH_IS_MVME16x) {
+		volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
+
+		/* Enable ints, etc. now */
+		pcc2[0x2a] = 0x55;	/* Edge sensitive */
+		pcc2[0x2b] = 0x15;
+	}
+#endif
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000) {
+		volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
+
+		*ethirq = 3;
+	}
+#endif
+
+
+	DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
+	memcpy(lp->cf_cmd.i596_config, init_setup, 14);
+	lp->cf_cmd.cmd.command = CmdConfigure;
+	i596_add_cmd(dev, &lp->cf_cmd.cmd);
+
+	DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
+	memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
+	lp->sa_cmd.cmd.command = CmdSASetup;
+	i596_add_cmd(dev, &lp->sa_cmd.cmd);
+
+	DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
+	lp->tdr_cmd.cmd.command = CmdTDR;
+	i596_add_cmd(dev, &lp->tdr_cmd.cmd);
+
+	spin_lock_irqsave (&lp->lock, flags);
+
+	if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
+		spin_unlock_irqrestore (&lp->lock, flags);
+		goto failed;
+	}
+	DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
+	lp->scb.command = RX_START;
+	CA(dev);
+
+	spin_unlock_irqrestore (&lp->lock, flags);
+
+	if (wait_cmd(dev,lp,1000,"RX_START not processed"))
+		goto failed;
+	DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
+	return 0;
+
+failed:
+	printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
+	MPU_PORT(dev, PORT_RESET, NULL);
+	return -1;
+}
+
+static inline int i596_rx(struct net_device *dev)
+{
+	struct i596_private *lp = dev->ml_priv;
+	struct i596_rfd *rfd;
+	struct i596_rbd *rbd;
+	int frames = 0;
+
+	DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
+			lp->rfd_head, lp->rbd_head));
+
+	rfd = lp->rfd_head;		/* Ref next frame to check */
+
+	while ((rfd->stat) & STAT_C) {	/* Loop while complete frames */
+		if (rfd->rbd == I596_NULL)
+			rbd = I596_NULL;
+		else if (rfd->rbd == lp->rbd_head->b_addr)
+			rbd = lp->rbd_head;
+		else {
+			printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
+			/* XXX Now what? */
+			rbd = I596_NULL;
+		}
+		DEB(DEB_RXFRAME, printk(KERN_DEBUG "  rfd %p, rfd.rbd %p, rfd.stat %04x\n",
+			rfd, rfd->rbd, rfd->stat));
+
+		if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
+			/* a good frame */
+			int pkt_len = rbd->count & 0x3fff;
+			struct sk_buff *skb = rbd->skb;
+			int rx_in_place = 0;
+
+			DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
+			frames++;
+
+			/* Check if the packet is long enough to just accept
+			 * without copying to a properly sized skbuff.
+			 */
+
+			if (pkt_len > rx_copybreak) {
+				struct sk_buff *newskb;
+
+				/* Get fresh skbuff to replace filled one. */
+				newskb = dev_alloc_skb(PKT_BUF_SZ);
+				if (newskb == NULL) {
+					skb = NULL;	/* drop pkt */
+					goto memory_squeeze;
+				}
+				/* Pass up the skb already on the Rx ring. */
+				skb_put(skb, pkt_len);
+				rx_in_place = 1;
+				rbd->skb = newskb;
+				newskb->dev = dev;
+				rbd->v_data = newskb->data;
+				rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
+#ifdef __mc68000__
+				cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
+#endif
+			}
+			else
+				skb = dev_alloc_skb(pkt_len + 2);
+memory_squeeze:
+			if (skb == NULL) {
+				/* XXX tulip.c can defer packets here!! */
+				printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
+				dev->stats.rx_dropped++;
+			}
+			else {
+				if (!rx_in_place) {
+					/* 16 byte align the data fields */
+					skb_reserve(skb, 2);
+					memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
+				}
+				skb->protocol=eth_type_trans(skb,dev);
+				skb->len = pkt_len;
+#ifdef __mc68000__
+				cache_clear(virt_to_phys(rbd->skb->data),
+						pkt_len);
+#endif
+				netif_rx(skb);
+				dev->stats.rx_packets++;
+				dev->stats.rx_bytes+=pkt_len;
+			}
+		}
+		else {
+			DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
+					dev->name, rfd->stat));
+			dev->stats.rx_errors++;
+			if ((rfd->stat) & 0x0001)
+				dev->stats.collisions++;
+			if ((rfd->stat) & 0x0080)
+				dev->stats.rx_length_errors++;
+			if ((rfd->stat) & 0x0100)
+				dev->stats.rx_over_errors++;
+			if ((rfd->stat) & 0x0200)
+				dev->stats.rx_fifo_errors++;
+			if ((rfd->stat) & 0x0400)
+				dev->stats.rx_frame_errors++;
+			if ((rfd->stat) & 0x0800)
+				dev->stats.rx_crc_errors++;
+			if ((rfd->stat) & 0x1000)
+				dev->stats.rx_length_errors++;
+		}
+
+		/* Clear the buffer descriptor count and EOF + F flags */
+
+		if (rbd != I596_NULL && (rbd->count & 0x4000)) {
+			rbd->count = 0;
+			lp->rbd_head = rbd->v_next;
+		}
+
+		/* Tidy the frame descriptor, marking it as end of list */
+
+		rfd->rbd = I596_NULL;
+		rfd->stat = 0;
+		rfd->cmd = CMD_EOL|CMD_FLEX;
+		rfd->count = 0;
+
+		/* Remove end-of-list from old end descriptor */
+
+		rfd->v_prev->cmd = CMD_FLEX;
+
+		/* Update record of next frame descriptor to process */
+
+		lp->scb.rfd = rfd->b_next;
+		lp->rfd_head = rfd->v_next;
+		rfd = lp->rfd_head;
+	}
+
+	DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
+
+	return 0;
+}
+
+
+static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
+{
+	struct i596_cmd *ptr;
+
+	while (lp->cmd_head != I596_NULL) {
+		ptr = lp->cmd_head;
+		lp->cmd_head = ptr->v_next;
+		lp->cmd_backlog--;
+
+		switch ((ptr->command) & 0x7) {
+		case CmdTx:
+			{
+				struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
+				struct sk_buff *skb = tx_cmd->skb;
+
+				dev_kfree_skb(skb);
+
+				dev->stats.tx_errors++;
+				dev->stats.tx_aborted_errors++;
+
+				ptr->v_next = ptr->b_next = I596_NULL;
+				tx_cmd->cmd.command = 0;  /* Mark as free */
+				break;
+			}
+		default:
+			ptr->v_next = ptr->b_next = I596_NULL;
+		}
+	}
+
+	wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
+	lp->scb.cmd = I596_NULL;
+}
+
+static void i596_reset(struct net_device *dev, struct i596_private *lp,
+			int ioaddr)
+{
+	unsigned long flags;
+
+	DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
+
+	spin_lock_irqsave (&lp->lock, flags);
+
+	wait_cmd(dev,lp,100,"i596_reset timed out");
+
+	netif_stop_queue(dev);
+
+	lp->scb.command = CUC_ABORT | RX_ABORT;
+	CA(dev);
+
+	/* wait for shutdown */
+	wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
+	spin_unlock_irqrestore (&lp->lock, flags);
+
+	i596_cleanup_cmd(dev,lp);
+	i596_rx(dev);
+
+	netif_start_queue(dev);
+	init_i596_mem(dev);
+}
+
+static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
+{
+	struct i596_private *lp = dev->ml_priv;
+	int ioaddr = dev->base_addr;
+	unsigned long flags;
+
+	DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
+
+	cmd->status = 0;
+	cmd->command |= (CMD_EOL | CMD_INTR);
+	cmd->v_next = cmd->b_next = I596_NULL;
+
+	spin_lock_irqsave (&lp->lock, flags);
+
+	if (lp->cmd_head != I596_NULL) {
+		lp->cmd_tail->v_next = cmd;
+		lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
+	} else {
+		lp->cmd_head = cmd;
+		wait_cmd(dev,lp,100,"i596_add_cmd timed out");
+		lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
+		lp->scb.command = CUC_START;
+		CA(dev);
+	}
+	lp->cmd_tail = cmd;
+	lp->cmd_backlog++;
+
+	spin_unlock_irqrestore (&lp->lock, flags);
+
+	if (lp->cmd_backlog > max_cmd_backlog) {
+		unsigned long tickssofar = jiffies - lp->last_cmd;
+
+		if (tickssofar < ticks_limit)
+			return;
+
+		printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
+
+		i596_reset(dev, lp, ioaddr);
+	}
+}
+
+static int i596_open(struct net_device *dev)
+{
+	int res = 0;
+
+	DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
+
+	if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
+		printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
+		return -EAGAIN;
+	}
+#ifdef ENABLE_MVME16x_NET
+	if (MACH_IS_MVME16x) {
+		if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) {
+			res = -EAGAIN;
+			goto err_irq_dev;
+		}
+	}
+#endif
+	res = init_rx_bufs(dev);
+	if (res)
+		goto err_irq_56;
+
+	netif_start_queue(dev);
+
+	if (init_i596_mem(dev)) {
+		res = -EAGAIN;
+		goto err_queue;
+	}
+
+	return 0;
+
+err_queue:
+	netif_stop_queue(dev);
+	remove_rx_bufs(dev);
+err_irq_56:
+#ifdef ENABLE_MVME16x_NET
+	free_irq(0x56, dev);
+err_irq_dev:
+#endif
+	free_irq(dev->irq, dev);
+
+	return res;
+}
+
+static void i596_tx_timeout (struct net_device *dev)
+{
+	struct i596_private *lp = dev->ml_priv;
+	int ioaddr = dev->base_addr;
+
+	/* Transmitter timeout, serious problems. */
+	DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
+			dev->name));
+
+	dev->stats.tx_errors++;
+
+	/* Try to restart the adaptor */
+	if (lp->last_restart == dev->stats.tx_packets) {
+		DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
+		/* Shutdown and restart */
+		i596_reset (dev, lp, ioaddr);
+	} else {
+		/* Issue a channel attention signal */
+		DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
+		lp->scb.command = CUC_START | RX_START;
+		CA (dev);
+		lp->last_restart = dev->stats.tx_packets;
+	}
+
+	dev->trans_start = jiffies; /* prevent tx timeout */
+	netif_wake_queue (dev);
+}
+
+static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct i596_private *lp = dev->ml_priv;
+	struct tx_cmd *tx_cmd;
+	struct i596_tbd *tbd;
+	short length = skb->len;
+
+	DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
+				dev->name, skb->len, skb->data));
+
+	if (skb->len < ETH_ZLEN) {
+		if (skb_padto(skb, ETH_ZLEN))
+			return NETDEV_TX_OK;
+		length = ETH_ZLEN;
+	}
+	netif_stop_queue(dev);
+
+	tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
+	tbd = lp->tbds + lp->next_tx_cmd;
+
+	if (tx_cmd->cmd.command) {
+		printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
+				dev->name);
+		dev->stats.tx_dropped++;
+
+		dev_kfree_skb(skb);
+	} else {
+		if (++lp->next_tx_cmd == TX_RING_SIZE)
+			lp->next_tx_cmd = 0;
+		tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
+		tbd->next = I596_NULL;
+
+		tx_cmd->cmd.command = CMD_FLEX | CmdTx;
+		tx_cmd->skb = skb;
+
+		tx_cmd->pad = 0;
+		tx_cmd->size = 0;
+		tbd->pad = 0;
+		tbd->size = EOF | length;
+
+		tbd->data = WSWAPchar(virt_to_bus(skb->data));
+
+#ifdef __mc68000__
+		cache_push(virt_to_phys(skb->data), length);
+#endif
+		DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
+		i596_add_cmd(dev, &tx_cmd->cmd);
+
+		dev->stats.tx_packets++;
+		dev->stats.tx_bytes += length;
+	}
+
+	netif_start_queue(dev);
+
+	return NETDEV_TX_OK;
+}
+
+static void print_eth(unsigned char *add, char *str)
+{
+	printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
+	       add, add + 6, add, add[12], add[13], str);
+}
+
+static int io = 0x300;
+static int irq = 10;
+
+static const struct net_device_ops i596_netdev_ops = {
+	.ndo_open 		= i596_open,
+	.ndo_stop		= i596_close,
+	.ndo_start_xmit		= i596_start_xmit,
+	.ndo_set_multicast_list = set_multicast_list,
+	.ndo_tx_timeout		= i596_tx_timeout,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_set_mac_address 	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+};
+
+struct net_device * __init i82596_probe(int unit)
+{
+	struct net_device *dev;
+	int i;
+	struct i596_private *lp;
+	char eth_addr[8];
+	static int probed;
+	int err;
+
+	if (probed)
+		return ERR_PTR(-ENODEV);
+	probed++;
+
+	dev = alloc_etherdev(0);
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	if (unit >= 0) {
+		sprintf(dev->name, "eth%d", unit);
+		netdev_boot_setup_check(dev);
+	} else {
+		dev->base_addr = io;
+		dev->irq = irq;
+	}
+
+#ifdef ENABLE_MVME16x_NET
+	if (MACH_IS_MVME16x) {
+		if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
+			printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
+			err = -ENODEV;
+			goto out;
+		}
+		memcpy(eth_addr, (void *) 0xfffc1f2c, 6);	/* YUCK! Get addr from NOVRAM */
+		dev->base_addr = MVME_I596_BASE;
+		dev->irq = (unsigned) MVME16x_IRQ_I596;
+		goto found;
+	}
+#endif
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000) {
+		volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
+		unsigned char msr = rtc[3];
+		int i;
+
+		rtc[3] |= 0x80;
+		for (i = 0; i < 6; i++)
+			eth_addr[i] = rtc[i * 4 + 7];	/* Stored in RTC RAM at offset 1 */
+		rtc[3] = msr;
+		dev->base_addr = BVME_I596_BASE;
+		dev->irq = (unsigned) BVME_IRQ_I596;
+		goto found;
+	}
+#endif
+#ifdef ENABLE_APRICOT
+	{
+		int checksum = 0;
+		int ioaddr = 0x300;
+
+		/* this is easy the ethernet interface can only be at 0x300 */
+		/* first check nothing is already registered here */
+
+		if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
+			printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
+			err = -EBUSY;
+			goto out;
+		}
+
+		dev->base_addr = ioaddr;
+
+		for (i = 0; i < 8; i++) {
+			eth_addr[i] = inb(ioaddr + 8 + i);
+			checksum += eth_addr[i];
+		}
+
+		/* checksum is a multiple of 0x100, got this wrong first time
+		   some machines have 0x100, some 0x200. The DOS driver doesn't
+		   even bother with the checksum.
+		   Some other boards trip the checksum.. but then appear as
+		   ether address 0. Trap these - AC */
+
+		if ((checksum % 0x100) ||
+		    (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
+			err = -ENODEV;
+			goto out1;
+		}
+
+		dev->irq = 10;
+		goto found;
+	}
+#endif
+	err = -ENODEV;
+	goto out;
+
+found:
+	dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
+	if (!dev->mem_start) {
+		err = -ENOMEM;
+		goto out1;
+	}
+
+	DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
+
+	for (i = 0; i < 6; i++)
+		DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
+
+	DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
+
+	DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
+
+	/* The 82596-specific entries in the device structure. */
+	dev->netdev_ops = &i596_netdev_ops;
+	dev->watchdog_timeo = TX_TIMEOUT;
+
+	dev->ml_priv = (void *)(dev->mem_start);
+
+	lp = dev->ml_priv;
+	DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
+			"lp->scb at 0x%08lx\n",
+			dev->name, (unsigned long)lp,
+			sizeof(struct i596_private), (unsigned long)&lp->scb));
+	memset((void *) lp, 0, sizeof(struct i596_private));
+
+#ifdef __mc68000__
+	cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
+	cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
+	kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
+#endif
+	lp->scb.command = 0;
+	lp->scb.cmd = I596_NULL;
+	lp->scb.rfd = I596_NULL;
+	spin_lock_init(&lp->lock);
+
+	err = register_netdev(dev);
+	if (err)
+		goto out2;
+	return dev;
+out2:
+#ifdef __mc68000__
+	/* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
+	 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
+	 */
+	kernel_set_cachemode((void *)(dev->mem_start), 4096,
+			IOMAP_FULL_CACHING);
+#endif
+	free_page ((u32)(dev->mem_start));
+out1:
+#ifdef ENABLE_APRICOT
+	release_region(dev->base_addr, I596_TOTAL_SIZE);
+#endif
+out:
+	free_netdev(dev);
+	return ERR_PTR(err);
+}
+
+static irqreturn_t i596_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct i596_private *lp;
+	short ioaddr;
+	unsigned short status, ack_cmd = 0;
+	int handled = 0;
+
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000) {
+		if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
+			i596_error(irq, dev_id);
+			return IRQ_HANDLED;
+		}
+	}
+#endif
+	if (dev == NULL) {
+		printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
+		return IRQ_NONE;
+	}
+
+	ioaddr = dev->base_addr;
+	lp = dev->ml_priv;
+
+	spin_lock (&lp->lock);
+
+	wait_cmd(dev,lp,100,"i596 interrupt, timeout");
+	status = lp->scb.status;
+
+	DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
+			dev->name, irq, status));
+
+	ack_cmd = status & 0xf000;
+
+	if ((status & 0x8000) || (status & 0x2000)) {
+		struct i596_cmd *ptr;
+
+		handled = 1;
+		if ((status & 0x8000))
+			DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
+		if ((status & 0x2000))
+			DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
+
+		while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
+			ptr = lp->cmd_head;
+
+			DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
+				       lp->cmd_head->status, lp->cmd_head->command));
+			lp->cmd_head = ptr->v_next;
+			lp->cmd_backlog--;
+
+			switch ((ptr->command) & 0x7) {
+			case CmdTx:
+			    {
+				struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
+				struct sk_buff *skb = tx_cmd->skb;
+
+				if ((ptr->status) & STAT_OK) {
+					DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
+				} else {
+					dev->stats.tx_errors++;
+					if ((ptr->status) & 0x0020)
+						dev->stats.collisions++;
+					if (!((ptr->status) & 0x0040))
+						dev->stats.tx_heartbeat_errors++;
+					if ((ptr->status) & 0x0400)
+						dev->stats.tx_carrier_errors++;
+					if ((ptr->status) & 0x0800)
+						dev->stats.collisions++;
+					if ((ptr->status) & 0x1000)
+						dev->stats.tx_aborted_errors++;
+				}
+
+				dev_kfree_skb_irq(skb);
+
+				tx_cmd->cmd.command = 0; /* Mark free */
+				break;
+			    }
+			case CmdTDR:
+			    {
+				unsigned short status = ((struct tdr_cmd *)ptr)->status;
+
+				if (status & 0x8000) {
+					DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
+				} else {
+					if (status & 0x4000)
+						printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
+					if (status & 0x2000)
+						printk(KERN_ERR "%s: Termination problem.\n", dev->name);
+					if (status & 0x1000)
+						printk(KERN_ERR "%s: Short circuit.\n", dev->name);
+
+					DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
+				}
+				break;
+			    }
+			case CmdConfigure:
+			case CmdMulticastList:
+				/* Zap command so set_multicast_list() knows it is free */
+				ptr->command = 0;
+				break;
+			}
+			ptr->v_next = ptr->b_next = I596_NULL;
+			lp->last_cmd = jiffies;
+		}
+
+		ptr = lp->cmd_head;
+		while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
+			ptr->command &= 0x1fff;
+			ptr = ptr->v_next;
+		}
+
+		if ((lp->cmd_head != I596_NULL))
+			ack_cmd |= CUC_START;
+		lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
+	}
+	if ((status & 0x1000) || (status & 0x4000)) {
+		if ((status & 0x4000))
+			DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
+		i596_rx(dev);
+		/* Only RX_START if stopped - RGH 07-07-96 */
+		if (status & 0x1000) {
+			if (netif_running(dev)) {
+				DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
+				ack_cmd |= RX_START;
+				dev->stats.rx_errors++;
+				dev->stats.rx_fifo_errors++;
+				rebuild_rx_bufs(dev);
+			}
+		}
+	}
+	wait_cmd(dev,lp,100,"i596 interrupt, timeout");
+	lp->scb.command = ack_cmd;
+
+#ifdef ENABLE_MVME16x_NET
+	if (MACH_IS_MVME16x) {
+		/* Ack the interrupt */
+
+		volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
+
+		pcc2[0x2a] |= 0x08;
+	}
+#endif
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000) {
+		volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
+
+		*ethirq = 1;
+		*ethirq = 3;
+	}
+#endif
+#ifdef ENABLE_APRICOT
+	(void) inb(ioaddr + 0x10);
+	outb(4, ioaddr + 0xf);
+#endif
+	CA(dev);
+
+	DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
+
+	spin_unlock (&lp->lock);
+	return IRQ_RETVAL(handled);
+}
+
+static int i596_close(struct net_device *dev)
+{
+	struct i596_private *lp = dev->ml_priv;
+	unsigned long flags;
+
+	netif_stop_queue(dev);
+
+	DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
+		       dev->name, lp->scb.status));
+
+	spin_lock_irqsave(&lp->lock, flags);
+
+	wait_cmd(dev,lp,100,"close1 timed out");
+	lp->scb.command = CUC_ABORT | RX_ABORT;
+	CA(dev);
+
+	wait_cmd(dev,lp,100,"close2 timed out");
+
+	spin_unlock_irqrestore(&lp->lock, flags);
+	DEB(DEB_STRUCT,i596_display_data(dev));
+	i596_cleanup_cmd(dev,lp);
+
+#ifdef ENABLE_MVME16x_NET
+	if (MACH_IS_MVME16x) {
+		volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
+
+		/* Disable all ints */
+		pcc2[0x28] = 1;
+		pcc2[0x2a] = 0x40;
+		pcc2[0x2b] = 0x40;	/* Set snooping bits now! */
+	}
+#endif
+#ifdef ENABLE_BVME6000_NET
+	if (MACH_IS_BVME6000) {
+		volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
+
+		*ethirq = 1;
+	}
+#endif
+
+#ifdef ENABLE_MVME16x_NET
+	free_irq(0x56, dev);
+#endif
+	free_irq(dev->irq, dev);
+	remove_rx_bufs(dev);
+
+	return 0;
+}
+
+/*
+ *    Set or clear the multicast filter for this adaptor.
+ */
+
+static void set_multicast_list(struct net_device *dev)
+{
+	struct i596_private *lp = dev->ml_priv;
+	int config = 0, cnt;
+
+	DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
+		dev->name, netdev_mc_count(dev),
+		dev->flags & IFF_PROMISC  ? "ON" : "OFF",
+		dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
+
+	if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
+		return;
+
+	if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
+		lp->cf_cmd.i596_config[8] |= 0x01;
+		config = 1;
+	}
+	if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
+		lp->cf_cmd.i596_config[8] &= ~0x01;
+		config = 1;
+	}
+	if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
+		lp->cf_cmd.i596_config[11] &= ~0x20;
+		config = 1;
+	}
+	if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
+		lp->cf_cmd.i596_config[11] |= 0x20;
+		config = 1;
+	}
+	if (config) {
+		lp->cf_cmd.cmd.command = CmdConfigure;
+		i596_add_cmd(dev, &lp->cf_cmd.cmd);
+	}
+
+	cnt = netdev_mc_count(dev);
+	if (cnt > MAX_MC_CNT)
+	{
+		cnt = MAX_MC_CNT;
+		printk(KERN_ERR "%s: Only %d multicast addresses supported",
+			dev->name, cnt);
+	}
+
+	if (!netdev_mc_empty(dev)) {
+		struct netdev_hw_addr *ha;
+		unsigned char *cp;
+		struct mc_cmd *cmd;
+
+		if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
+			return;
+		cmd = &lp->mc_cmd;
+		cmd->cmd.command = CmdMulticastList;
+		cmd->mc_cnt = cnt * ETH_ALEN;
+		cp = cmd->mc_addrs;
+		netdev_for_each_mc_addr(ha, dev) {
+			if (!cnt--)
+				break;
+			memcpy(cp, ha->addr, ETH_ALEN);
+			if (i596_debug > 1)
+				DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
+						dev->name, cp));
+			cp += ETH_ALEN;
+		}
+		i596_add_cmd(dev, &cmd->cmd);
+	}
+}
+
+#ifdef MODULE
+static struct net_device *dev_82596;
+
+#ifdef ENABLE_APRICOT
+module_param(irq, int, 0);
+MODULE_PARM_DESC(irq, "Apricot IRQ number");
+#endif
+
+static int debug = -1;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "i82596 debug mask");
+
+int __init init_module(void)
+{
+	if (debug >= 0)
+		i596_debug = debug;
+	dev_82596 = i82596_probe(-1);
+	if (IS_ERR(dev_82596))
+		return PTR_ERR(dev_82596);
+	return 0;
+}
+
+void __exit cleanup_module(void)
+{
+	unregister_netdev(dev_82596);
+#ifdef __mc68000__
+	/* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
+	 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
+	 */
+
+	kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
+			IOMAP_FULL_CACHING);
+#endif
+	free_page ((u32)(dev_82596->mem_start));
+#ifdef ENABLE_APRICOT
+	/* If we don't do this, we can't re-insmod it later. */
+	release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
+#endif
+	free_netdev(dev_82596);
+}
+
+#endif				/* MODULE */