patch-1.3.74 linux/drivers/net/fmv18x.c

• Lines: 665
• Date: Wed Mar 13 08:38:54 1996
• Orig file: v1.3.73/linux/drivers/net/fmv18x.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.73/linux/drivers/net/fmv18x.c linux/drivers/net/fmv18x.c
@@ -0,0 +1,664 @@
+/* fmv18x.c: A network device driver for  the Fujitsu FMV-181/182.
+
+	Original: at1700.c (1993-94 by Donald Becker).
+		Copyright 1993 United States Government as represented by the
+		Director, National Security Agency.
+		The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
+		Center of Excellence in Space Data and Information Sciences
+		   Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
+
+	Modified by Yutaka TAMIYA (tamy@flab.fujitsu.co.jp)
+		Copyright 1994 Fujitsu Laboratories Ltd.
+	Special thanks to:
+		Masayoshi UTAKA (utaka@ace.yk.fujitsu.co.jp)
+			for testing this driver.
+		H. NEGISHI (agy, negishi@sun45.psd.cs.fujitsu.co.jp)
+			for sugestion of some program modification.
+		Masahiro SEKIGUCHI <seki@sysrap.cs.fujitsu.co.jp>
+			for sugestion of some program modification.
+		Kazutoshi MORIOKA (morioka@aurora.oaks.cs.fujitsu.co.jp)
+			for testing this driver.
+
+	This software may be used and distributed according to the terms
+	of the GNU Public License, incorporated herein by reference.
+
+	This is a device driver for the Fujitsu FMV-181/182, which is a
+	straight-forward Fujitsu MB86965 implementation.
+
+  Sources:
+    at1700.c
+    The Fujitsu MB86965 datasheet.
+    The Fujitsu FMV-181/182 user's guide
+*/
+
+static const char *version =
+	"fmv18x.c:v1.3.71e 03/04/96  Yutaka TAMIYA (tamy@flab.fujitsu.co.jp)\n";
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/malloc.h>
+#include <linux/string.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <linux/errno.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+
+static int fmv18x_probe_list[] =
+{0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x300, 0x340, 0};
+
+/* use 0 for production, 1 for verification, >2 for debug */
+#ifndef NET_DEBUG
+#define NET_DEBUG 1
+#endif
+static unsigned int net_debug = NET_DEBUG;
+
+typedef unsigned char uchar;
+
+/* Information that need to be kept for each board. */
+struct net_local {
+	struct enet_statistics stats;
+	long open_time;				/* Useless example local info. */
+	uint tx_started:1;			/* Number of packet on the Tx queue. */
+	uchar tx_queue;				/* Number of packet on the Tx queue. */
+	ushort tx_queue_len;		/* Current length of the Tx queue. */
+};
+
+
+/* Offsets from the base address. */
+#define STATUS			0
+#define TX_STATUS		0
+#define RX_STATUS		1
+#define TX_INTR			2		/* Bit-mapped interrupt enable registers. */
+#define RX_INTR			3
+#define TX_MODE			4
+#define RX_MODE			5
+#define CONFIG_0		6		/* Misc. configuration settings. */
+#define CONFIG_1		7
+/* Run-time register bank 2 definitions. */
+#define DATAPORT		8		/* Word-wide DMA or programmed-I/O dataport. */
+#define TX_START		10
+#define COL16CNTL		11
+#define MODE13			13
+/* Fujitsu FMV-18x Card Configuration */
+#define	FJ_STATUS0		0x10
+#define	FJ_STATUS1		0x11
+#define	FJ_CONFIG0		0x12
+#define	FJ_CONFIG1		0x13
+#define	FJ_MACADDR		0x14	/* 0x14 - 0x19 */
+#define	FJ_BUFCNTL		0x1A
+#define	FJ_BUFDATA		0x1C
+#define FMV18X_IO_EXTENT	32
+
+/* Index to functions, as function prototypes. */
+
+extern int fmv18x_probe(struct device *dev);
+
+static int fmv18x_probe1(struct device *dev, short ioaddr);
+static int net_open(struct device *dev);
+static int	net_send_packet(struct sk_buff *skb, struct device *dev);
+static void net_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static void net_rx(struct device *dev);
+static int net_close(struct device *dev);
+static struct enet_statistics *net_get_stats(struct device *dev);
+static void set_multicast_list(struct device *dev);
+
+
+/* Check for a network adaptor of this type, and return '0' iff one exists.
+   If dev->base_addr == 0, probe all likely locations.
+   If dev->base_addr == 1, always return failure.
+   If dev->base_addr == 2, allocate space for the device and return success
+   (detachable devices only).
+   */
+#ifdef HAVE_DEVLIST
+/* Support for a alternate probe manager, which will eliminate the
+   boilerplate below. */
+struct netdev_entry fmv18x_drv =
+{"fmv18x", fmv18x_probe1, FMV18X_IO_EXTENT, fmv18x_probe_list};
+#else
+int
+fmv18x_probe(struct device *dev)
+{
+	int i;
+	int base_addr = dev ? dev->base_addr : 0;
+
+	if (base_addr > 0x1ff)		/* Check a single specified location. */
+		return fmv18x_probe1(dev, base_addr);
+	else if (base_addr != 0)	/* Don't probe at all. */
+		return ENXIO;
+
+	for (i = 0; fmv18x_probe_list[i]; i++) {
+		int ioaddr = fmv18x_probe_list[i];
+ 		if (check_region(ioaddr, FMV18X_IO_EXTENT))
+			continue;
+		if (fmv18x_probe1(dev, ioaddr) == 0)
+			return 0;
+	}
+
+	return ENODEV;
+}
+#endif
+
+/* The Fujitsu datasheet suggests that the NIC be probed for by checking its
+   "signature", the default bit pattern after a reset.  This *doesn't* work --
+   there is no way to reset the bus interface without a complete power-cycle!
+
+   It turns out that ATI came to the same conclusion I did: the only thing
+   that can be done is checking a few bits and then diving right into MAC
+   address check. */
+
+int fmv18x_probe1(struct device *dev, short ioaddr)
+{
+	char irqmap[4] = {3, 7, 10, 15};
+	unsigned int i, irq;
+
+	/* Resetting the chip doesn't reset the ISA interface, so don't bother.
+	   That means we have to be careful with the register values we probe for.
+	   */
+
+	/* Check I/O address configuration and Fujitsu vendor code */
+	if (fmv18x_probe_list[inb(ioaddr + FJ_CONFIG0) & 0x07] != ioaddr
+ 	||  inb(ioaddr+FJ_MACADDR  ) != 0x00
+	||  inb(ioaddr+FJ_MACADDR+1) != 0x00
+	||  inb(ioaddr+FJ_MACADDR+2) != 0x0e)
+		return -ENODEV;
+
+	irq = irqmap[(inb(ioaddr + FJ_CONFIG0)>>6) & 0x03];
+
+	/* Snarf the interrupt vector now. */
+	if (request_irq(irq, &net_interrupt, 0, "fmv18x", NULL)) {
+		printk ("FMV-18x found at %#3x, but it's unusable due to a conflict on"
+				"IRQ %d.\n", ioaddr, irq);
+		return EAGAIN;
+	}
+
+	/* Allocate a new 'dev' if needed. */
+	if (dev == NULL)
+		dev = init_etherdev(0, sizeof(struct net_local));
+
+	/* Grab the region so that we can find another board if the IRQ request
+	   fails. */
+ 	request_region(ioaddr, FMV18X_IO_EXTENT, "fmv18x");
+
+	printk("%s: FMV-18x found at %#3x, IRQ %d, address ", dev->name,
+		   ioaddr, irq);
+
+	dev->base_addr = ioaddr;
+	dev->irq = irq;
+	irq2dev_map[irq] = dev;
+
+	for(i = 0; i < 6; i++) {
+		unsigned char val = inb(ioaddr + FJ_MACADDR + i);
+		printk("%02x", val);
+		dev->dev_addr[i] = val;
+	}
+
+	/* "FJ_STATUS0" 12 bit 0x0400 means use regular 100 ohm 10baseT signals,
+	   rather than 150 ohm shielded twisted pair compensation.
+	   0x0000 == auto-sense the interface
+	   0x0800 == use TP interface
+	   0x1800 == use coax interface
+	   */
+	{
+		const char *porttype[] = {"auto-sense", "10baseT", "auto-sense", "10base2/5"};
+		ushort setup_value = inb(ioaddr + FJ_STATUS0);
+
+		switch( setup_value & 0x07 ){
+		case 0x01 /* 10base5 */:
+		case 0x02 /* 10base2 */: dev->if_port = 0x18; break;
+		case 0x04 /* 10baseT */: dev->if_port = 0x08; break;
+		default /* auto-sense*/: dev->if_port = 0x00; break;
+		}
+		printk(" %s interface.\n", porttype[(dev->if_port>>3) & 3]);
+	}
+
+	/* Initialize LAN Controller and LAN Card */
+	outb(0xda, ioaddr + CONFIG_0);	 /* Initialize LAN Controller */
+	outb(0x00, ioaddr + CONFIG_1);	 /* Stand by mode */
+	outb(0x00, ioaddr + FJ_CONFIG1); /* Disable IRQ of LAN Card */
+	outb(0x00, ioaddr + FJ_BUFCNTL); /* Reset ? I'm not sure (TAMIYA) */
+
+	/* wait for a while */
+	udelay(200);
+
+	/* Set the station address in bank zero. */
+	outb(0x00, ioaddr + CONFIG_1);
+	for (i = 0; i < 6; i++)
+		outb(dev->dev_addr[i], ioaddr + 8 + i);
+
+	/* Switch to bank 1 and set the multicast table to accept none. */
+	outb(0x04, ioaddr + CONFIG_1);
+	for (i = 0; i < 8; i++)
+		outb(0x00, ioaddr + 8 + i);
+
+	/* Switch to bank 2 and lock our I/O address. */
+	outb(0x08, ioaddr + CONFIG_1);
+	outb(dev->if_port, ioaddr + MODE13);
+
+	if (net_debug)
+		printk(version);
+
+	/* Initialize the device structure. */
+	dev->priv = kmalloc(sizeof(struct net_local), GFP_KERNEL);
+	if (dev->priv == NULL)
+		return -ENOMEM;
+	memset(dev->priv, 0, sizeof(struct net_local));
+
+	dev->open		= net_open;
+	dev->stop		= net_close;
+	dev->hard_start_xmit = net_send_packet;
+	dev->get_stats	= net_get_stats;
+	dev->set_multicast_list = &set_multicast_list;
+
+	/* Fill in the fields of 'dev' with ethernet-generic values. */
+	   
+	ether_setup(dev);
+	return 0;
+}
+
+
+static int net_open(struct device *dev)
+{
+	struct net_local *lp = (struct net_local *)dev->priv;
+	int ioaddr = dev->base_addr;
+
+	/* Set the configuration register 0 to 32K 100ns. byte-wide memory,
+	   16 bit bus access, and two 4K Tx, enable the Rx and Tx. */
+	outb(0x5a, ioaddr + CONFIG_0);
+
+	/* Powerup and switch to register bank 2 for the run-time registers. */
+	outb(0xe8, ioaddr + CONFIG_1);
+
+	lp->tx_started = 0;
+	lp->tx_queue = 0;
+	lp->tx_queue_len = 0;
+
+	/* Clear Tx and Rx Status */
+	outb(0xff, ioaddr + TX_STATUS);
+	outb(0xff, ioaddr + RX_STATUS);
+	lp->open_time = jiffies;
+
+	dev->tbusy = 0;
+	dev->interrupt = 0;
+	dev->start = 1;
+
+	/* Enable the IRQ of the LAN Card */
+	outb(0x80, ioaddr + FJ_CONFIG1);
+
+	/* Enable both Tx and Rx interrupts */
+	outw(0x8182, ioaddr+TX_INTR);
+
+	MOD_INC_USE_COUNT;
+
+	return 0;
+}
+
+static int
+net_send_packet(struct sk_buff *skb, struct device *dev)
+{
+	struct net_local *lp = (struct net_local *)dev->priv;
+	int ioaddr = dev->base_addr;
+
+	if (dev->tbusy) {
+		/* If we get here, some higher level has decided we are broken.
+		   There should really be a "kick me" function call instead. */
+		int tickssofar = jiffies - dev->trans_start;
+		if (tickssofar < 10)
+			return 1;
+		printk("%s: transmit timed out with status %04x, %s?\n", dev->name,
+			   htons(inw(ioaddr + TX_STATUS)),
+			   inb(ioaddr + TX_STATUS) & 0x80
+			   ? "IRQ conflict" : "network cable problem");
+		printk("%s: timeout registers: %04x %04x %04x %04x %04x %04x %04x %04x.\n",
+			   dev->name, htons(inw(ioaddr + 0)),
+			   htons(inw(ioaddr + 2)), htons(inw(ioaddr + 4)),
+			   htons(inw(ioaddr + 6)), htons(inw(ioaddr + 8)),
+			   htons(inw(ioaddr +10)), htons(inw(ioaddr +12)),
+			   htons(inw(ioaddr +14)));
+		printk("eth card: %04x %04x\n",
+			htons(inw(ioaddr+FJ_STATUS0)),
+			htons(inw(ioaddr+FJ_CONFIG0)));
+		lp->stats.tx_errors++;
+		/* ToDo: We should try to restart the adaptor... */
+		cli();
+
+		/* Initialize LAN Controller and LAN Card */
+		outb(0xda, ioaddr + CONFIG_0);   /* Initialize LAN Controller */
+		outb(0x00, ioaddr + CONFIG_1);   /* Stand by mode */
+		outb(0x00, ioaddr + FJ_CONFIG1); /* Disable IRQ of LAN Card */
+		outb(0x00, ioaddr + FJ_BUFCNTL); /* Reset ? I'm not sure */
+		net_open(dev);
+
+		sti();
+	}
+
+	/* If some higher layer thinks we've missed an tx-done interrupt
+	   we are passed NULL. Caution: dev_tint() handles the cli()/sti()
+	   itself. */
+	if (skb == NULL) {
+		dev_tint(dev);
+		return 0;
+	}
+
+	/* Block a timer-based transmit from overlapping.  This could better be
+	   done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
+	if (set_bit(0, (void*)&dev->tbusy) != 0)
+		printk("%s: Transmitter access conflict.\n", dev->name);
+	else {
+		short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
+		unsigned char *buf = skb->data;
+
+		if (length > ETH_FRAME_LEN) {
+			if (net_debug)
+				printk("%s: Attempting to send a large packet (%d bytes).\n",
+					dev->name, length);
+			return 1;
+		}
+
+		if (net_debug > 4)
+			printk("%s: Transmitting a packet of length %lu.\n", dev->name,
+				   (unsigned long)skb->len);
+
+		/* Disable both interrupts. */
+		outw(0x0000, ioaddr + TX_INTR);
+		
+		outw(length, ioaddr + DATAPORT);
+		outsw(ioaddr + DATAPORT, buf, (length + 1) >> 1);
+
+		lp->tx_queue++;
+		lp->tx_queue_len += length + 2;
+
+		if (lp->tx_started == 0) {
+			/* If the Tx is idle, always trigger a transmit. */
+			outb(0x80 | lp->tx_queue, ioaddr + TX_START);
+			lp->tx_queue = 0;
+			lp->tx_queue_len = 0;
+			dev->trans_start = jiffies;
+			lp->tx_started = 1;
+			dev->tbusy = 0;
+		} else if (lp->tx_queue_len < 4096 - 1502)
+			/* Yes, there is room for one more packet. */
+			dev->tbusy = 0;
+
+		/* Re-enable interrupts */
+		outw(0x8182, ioaddr + TX_INTR);
+	}
+	dev_kfree_skb (skb, FREE_WRITE);
+
+	return 0;
+}
+
+/* The typical workload of the driver:
+   Handle the network interface interrupts. */
+static void
+net_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct device *dev = (struct device *)(irq2dev_map[irq]);
+	struct net_local *lp;
+	int ioaddr, status;
+
+	if (dev == NULL) {
+		printk ("fmv18x_interrupt(): irq %d for unknown device.\n", irq);
+		return;
+	}
+	dev->interrupt = 1;
+
+	ioaddr = dev->base_addr;
+	lp = (struct net_local *)dev->priv;
+
+	/* Avoid multiple interrupts. */
+	outw(0x0000, ioaddr + TX_INTR);
+
+        status = inw(ioaddr + TX_STATUS);
+	outw(status, ioaddr + TX_STATUS);
+
+	if (net_debug > 4)
+		printk("%s: Interrupt with status %04x.\n", dev->name, status);
+	if (status & 0xff00
+		||  (inb(ioaddr + RX_MODE) & 0x40) == 0) {			/* Got a packet(s). */
+		net_rx(dev);
+	}
+	if (status & 0x00ff) {
+		if (status & 0x80) {
+			lp->stats.tx_packets++;
+			if (lp->tx_queue) {
+				outb(0x80 | lp->tx_queue, ioaddr + TX_START);
+				lp->tx_queue = 0;
+				lp->tx_queue_len = 0;
+				dev->trans_start = jiffies;
+				dev->tbusy = 0;
+				mark_bh(NET_BH);	/* Inform upper layers. */
+			} else {
+				lp->tx_started = 0;
+				dev->tbusy = 0;
+				mark_bh(NET_BH);	/* Inform upper layers. */
+			}
+		}
+		if (status & 0x02 ) {
+			if (net_debug > 4)
+				printk("%s: 16 Collision occur during Txing.\n", dev->name);
+			/* Retry to send the packet */
+			outb(0x02, ioaddr + COL16CNTL);
+		}
+	}
+
+	dev->interrupt = 0;
+	outw(0x8182, ioaddr + TX_INTR);
+	return;
+}
+
+/* We have a good packet(s), get it/them out of the buffers. */
+static void
+net_rx(struct device *dev)
+{
+	struct net_local *lp = (struct net_local *)dev->priv;
+	int ioaddr = dev->base_addr;
+	int boguscount = 10;	/* 5 -> 10: by agy 19940922 */
+
+	while ((inb(ioaddr + RX_MODE) & 0x40) == 0) {
+		/* Clear PKT_RDY bit: by agy 19940922 */
+		/* outb(0x80, ioaddr + RX_STATUS); */
+		ushort status = inw(ioaddr + DATAPORT);
+
+		if (net_debug > 4)
+			printk("%s: Rxing packet mode %02x status %04x.\n",
+				   dev->name, inb(ioaddr + RX_MODE), status);
+#ifndef final_version
+		if (status == 0) {
+			outb(0x05, ioaddr + 14);
+			break;
+		}
+#endif
+
+		if ((status & 0xF0) != 0x20) {	/* There was an error. */
+			lp->stats.rx_errors++;
+			if (status & 0x08) lp->stats.rx_length_errors++;
+			if (status & 0x04) lp->stats.rx_frame_errors++;
+			if (status & 0x02) lp->stats.rx_crc_errors++;
+			if (status & 0x01) lp->stats.rx_over_errors++;
+		} else {
+			ushort pkt_len = inw(ioaddr + DATAPORT);
+			/* Malloc up new buffer. */
+			struct sk_buff *skb;
+
+			if (pkt_len > 1550) {
+				printk("%s: The FMV-18x claimed a very large packet, size %d.\n",
+					   dev->name, pkt_len);
+				outb(0x05, ioaddr + 14);
+				lp->stats.rx_errors++;
+				break;
+			}
+			skb = dev_alloc_skb(pkt_len+3);
+			if (skb == NULL) {
+				printk("%s: Memory squeeze, dropping packet (len %d).\n",
+					   dev->name, pkt_len);
+				outb(0x05, ioaddr + 14);
+				lp->stats.rx_dropped++;
+				break;
+			}
+			skb->dev = dev;
+			skb_reserve(skb,2);
+
+			insw(ioaddr + DATAPORT, skb_put(skb,pkt_len), (pkt_len + 1) >> 1);
+
+			if (net_debug > 5) {
+				int i;
+				printk("%s: Rxed packet of length %d: ", dev->name, pkt_len);
+				for (i = 0; i < 14; i++)
+					printk(" %02x", skb->data[i]);
+				printk(".\n");
+			}
+
+			skb->protocol=eth_type_trans(skb, dev);
+			netif_rx(skb);
+			lp->stats.rx_packets++;
+		}
+		if (--boguscount <= 0)
+			break;
+	}
+
+	/* If any worth-while packets have been received, dev_rint()
+	   has done a mark_bh(NET_BH) for us and will work on them
+	   when we get to the bottom-half routine. */
+	{
+		int i;
+		for (i = 0; i < 20; i++) {
+			if ((inb(ioaddr + RX_MODE) & 0x40) == 0x40)
+				break;
+			(void)inw(ioaddr + DATAPORT);				/* dummy status read */
+			outb(0x05, ioaddr + 14);
+		}
+
+		if (net_debug > 5 && i > 0)
+			printk("%s: Exint Rx packet with mode %02x after %d ticks.\n", 
+				   dev->name, inb(ioaddr + RX_MODE), i);
+	}
+
+	return;
+}
+
+/* The inverse routine to net_open(). */
+static int net_close(struct device *dev)
+{
+	int ioaddr = dev->base_addr;
+
+	((struct net_local *)dev->priv)->open_time = 0;
+
+	dev->tbusy = 1;
+	dev->start = 0;
+
+	/* Set configuration register 0 to disable Tx and Rx. */
+	outb(0xda, ioaddr + CONFIG_0);
+
+	/* Update the statistics -- ToDo. */
+
+	/* Power-down the chip.  Green, green, green! */
+	outb(0x00, ioaddr + CONFIG_1);
+
+	MOD_DEC_USE_COUNT;
+
+	/* Set the ethernet adaptor disable IRQ */
+	outb(0x00, ioaddr + FJ_CONFIG1);
+
+	return 0;
+}
+
+/* Get the current statistics.	This may be called with the card open or
+   closed. */
+static struct enet_statistics *
+net_get_stats(struct device *dev)
+{
+	struct net_local *lp = (struct net_local *)dev->priv;
+
+	cli();
+	/* ToDo: Update the statistics from the device registers. */
+	sti();
+
+	return &lp->stats;
+}
+
+/* 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
+set_multicast_list(struct device *dev)
+{
+	short ioaddr = dev->base_addr;
+	if (dev->mc_count || dev->flags&(IFF_PROMISC|IFF_ALLMULTI)) 
+	{
+		/*
+		 *	We must make the kernel realise we had to move
+		 *	into promisc mode or we start all out war on
+		 *	the cable. - AC
+		 */
+		dev->flags|=IFF_PROMISC;		
+	
+		outb(3, ioaddr + RX_MODE);	/* Enable promiscuous mode */
+	} 
+	else
+		outb(2, ioaddr + RX_MODE);	/* Disable promiscuous, use normal mode */
+}
+
+#ifdef MODULE
+static char devicename[9] = { 0, };
+static struct device dev_fmv18x = {
+	devicename, /* device name is inserted by linux/drivers/net/net_init.c */
+	0, 0, 0, 0,
+	0, 0,
+	0, 0, 0, NULL, fmv18x_probe };
+
+static int io = 0x220;
+static int irq = 0;
+
+int init_module(void)
+{
+	if (io == 0)
+		printk("fmv18x: You should not use auto-probing with insmod!\n");
+	dev_fmv18x.base_addr = io;
+	dev_fmv18x.irq       = irq;
+	if (register_netdev(&dev_fmv18x) != 0) {
+		printk("fmv18x: register_netdev() returned non-zero.\n");
+		return -EIO;
+	}
+	return 0;
+}
+
+void
+cleanup_module(void)
+{
+	unregister_netdev(&dev_fmv18x);
+	kfree(dev_fmv18x.priv);
+	dev_fmv18x.priv = NULL;
+
+	/* If we don't do this, we can't re-insmod it later. */
+	free_irq(dev_fmv18x.irq, NULL);
+	irq2dev_map[dev_fmv18x.irq] = NULL;
+	release_region(dev_fmv18x.base_addr, FMV18X_IO_EXTENT);
+}
+#endif /* MODULE */
+
+/*
+ * Local variables:
+ *  compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c fmv18x.c"
+ *  version-control: t
+ *  kept-new-versions: 5
+ *  tab-width: 4
+ *  c-indent-level: 4
+ * End:
+ */