3c*/acenic/typhoon: Move 3Com Ethernet drivers

Moves the 3Com drivers into drivers/net/ethernet/3com/ and the necessary
Kconfig and Makefile changes.

Did not move the following drivers becuase they use a non-3Com
chipset: 3c503, 3c505, 3c507, 3c523 and 3c527

CC: Steffen Klassert <klassert@mathematik.tu-chemnitz.de>
CC: David Dillow <dave@thedillows.org>
CC: Jes Sorensen <jes@trained-monkey.org>
CC: Alan Cox <alan@linux.intel.com>
CC: David Hinds <dahinds@users.sourceforge.net>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: David Dillow <dave@thedillows.org>

1 files changed, 1584 insertions, 0 deletions

diff --git a/drivers/net/ethernet/3com/3c515.c b/drivers/net/ethernet/3com/3c515.c
new file mode 100644
index 000000000000..d2bb4b254c57
--- /dev/null
+++ b/drivers/net/ethernet/3com/3c515.c
@@ -0,0 +1,1584 @@
+/*
+	Written 1997-1998 by Donald Becker.
+
+	This software may be used and distributed according to the terms
+	of the GNU General Public License, incorporated herein by reference.
+
+	This driver is for the 3Com ISA EtherLink XL "Corkscrew" 3c515 ethercard.
+
+	The author may be reached as becker@scyld.com, or C/O
+	Scyld Computing Corporation
+	410 Severn Ave., Suite 210
+	Annapolis MD 21403
+
+
+	2000/2/2- Added support for kernel-level ISAPnP
+		by Stephen Frost <sfrost@snowman.net> and Alessandro Zummo
+	Cleaned up for 2.3.x/softnet by Jeff Garzik and Alan Cox.
+
+	2001/11/17 - Added ethtool support (jgarzik)
+
+	2002/10/28 - Locking updates for 2.5 (alan@lxorguk.ukuu.org.uk)
+
+*/
+
+#define DRV_NAME		"3c515"
+#define DRV_VERSION		"0.99t-ac"
+#define DRV_RELDATE		"28-Oct-2002"
+
+static char *version =
+DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " becker@scyld.com and others\n";
+
+#define CORKSCREW 1
+
+/* "Knobs" that adjust features and parameters. */
+/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
+   Setting to > 1512 effectively disables this feature. */
+static int rx_copybreak = 200;
+
+/* Allow setting MTU to a larger size, bypassing the normal ethernet setup. */
+static const int mtu = 1500;
+
+/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
+static int max_interrupt_work = 20;
+
+/* Enable the automatic media selection code -- usually set. */
+#define AUTOMEDIA 1
+
+/* Allow the use of fragment bus master transfers instead of only
+   programmed-I/O for Vortex cards.  Full-bus-master transfers are always
+   enabled by default on Boomerang cards.  If VORTEX_BUS_MASTER is defined,
+   the feature may be turned on using 'options'. */
+#define VORTEX_BUS_MASTER
+
+/* A few values that may be tweaked. */
+/* Keep the ring sizes a power of two for efficiency. */
+#define TX_RING_SIZE	16
+#define RX_RING_SIZE	16
+#define PKT_BUF_SZ		1536	/* Size of each temporary Rx buffer. */
+
+#include <linux/module.h>
+#include <linux/isapnp.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/in.h>
+#include <linux/ioport.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/ethtool.h>
+#include <linux/bitops.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+
+#define NEW_MULTICAST
+#include <linux/delay.h>
+
+#define MAX_UNITS 8
+
+MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
+MODULE_DESCRIPTION("3Com 3c515 Corkscrew driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+/* "Knobs" for adjusting internal parameters. */
+/* Put out somewhat more debugging messages. (0 - no msg, 1 minimal msgs). */
+#define DRIVER_DEBUG 1
+/* Some values here only for performance evaluation and path-coverage
+   debugging. */
+static int rx_nocopy, rx_copy, queued_packet;
+
+/* Number of times to check to see if the Tx FIFO has space, used in some
+   limited cases. */
+#define WAIT_TX_AVAIL 200
+
+/* Operational parameter that usually are not changed. */
+#define TX_TIMEOUT  ((4*HZ)/10)	/* Time in jiffies before concluding Tx hung */
+
+/* The size here is somewhat misleading: the Corkscrew also uses the ISA
+   aliased registers at <base>+0x400.
+   */
+#define CORKSCREW_TOTAL_SIZE 0x20
+
+#ifdef DRIVER_DEBUG
+static int corkscrew_debug = DRIVER_DEBUG;
+#else
+static int corkscrew_debug = 1;
+#endif
+
+#define CORKSCREW_ID 10
+
+/*
+				Theory of Operation
+
+I. Board Compatibility
+
+This device driver is designed for the 3Com 3c515 ISA Fast EtherLink XL,
+3Com's ISA bus adapter for Fast Ethernet.  Due to the unique I/O port layout,
+it's not practical to integrate this driver with the other EtherLink drivers.
+
+II. Board-specific settings
+
+The Corkscrew has an EEPROM for configuration, but no special settings are
+needed for Linux.
+
+III. Driver operation
+
+The 3c515 series use an interface that's very similar to the 3c900 "Boomerang"
+PCI cards, with the bus master interface extensively modified to work with
+the ISA bus.
+
+The card is capable of full-bus-master transfers with separate
+lists of transmit and receive descriptors, similar to the AMD LANCE/PCnet,
+DEC Tulip and Intel Speedo3.
+
+This driver uses a "RX_COPYBREAK" scheme rather than a fixed intermediate
+receive buffer.  This scheme allocates full-sized skbuffs as receive
+buffers.  The value RX_COPYBREAK is used as the copying breakpoint: it is
+chosen to trade-off the memory wasted by passing the full-sized skbuff to
+the queue layer for all frames vs. the copying cost of copying a frame to a
+correctly-sized skbuff.
+
+
+IIIC. Synchronization
+The driver runs as two independent, single-threaded flows of control.  One
+is the send-packet routine, which enforces single-threaded use by the netif
+layer.  The other thread is the interrupt handler, which is single
+threaded by the hardware and other software.
+
+IV. Notes
+
+Thanks to Terry Murphy of 3Com for providing documentation and a development
+board.
+
+The names "Vortex", "Boomerang" and "Corkscrew" are the internal 3Com
+project names.  I use these names to eliminate confusion -- 3Com product
+numbers and names are very similar and often confused.
+
+The new chips support both ethernet (1.5K) and FDDI (4.5K) frame sizes!
+This driver only supports ethernet frames because of the recent MTU limit
+of 1.5K, but the changes to support 4.5K are minimal.
+*/
+
+/* Operational definitions.
+   These are not used by other compilation units and thus are not
+   exported in a ".h" file.
+
+   First the windows.  There are eight register windows, with the command
+   and status registers available in each.
+   */
+#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
+#define EL3_CMD 0x0e
+#define EL3_STATUS 0x0e
+
+/* The top five bits written to EL3_CMD are a command, the lower
+   11 bits are the parameter, if applicable.
+   Note that 11 parameters bits was fine for ethernet, but the new chips
+   can handle FDDI length frames (~4500 octets) and now parameters count
+   32-bit 'Dwords' rather than octets. */
+
+enum corkscrew_cmd {
+	TotalReset = 0 << 11, SelectWindow = 1 << 11, StartCoax = 2 << 11,
+	RxDisable = 3 << 11, RxEnable = 4 << 11, RxReset = 5 << 11,
+	UpStall = 6 << 11, UpUnstall = (6 << 11) + 1, DownStall = (6 << 11) + 2,
+	DownUnstall = (6 << 11) + 3, RxDiscard = 8 << 11, TxEnable = 9 << 11,
+	TxDisable = 10 << 11, TxReset = 11 << 11, FakeIntr = 12 << 11,
+	AckIntr = 13 << 11, SetIntrEnb = 14 << 11, SetStatusEnb = 15 << 11,
+	SetRxFilter = 16 << 11, SetRxThreshold = 17 << 11,
+	SetTxThreshold = 18 << 11, SetTxStart = 19 << 11, StartDMAUp = 20 << 11,
+	StartDMADown = (20 << 11) + 1, StatsEnable = 21 << 11,
+	StatsDisable = 22 << 11, StopCoax = 23 << 11,
+};
+
+/* The SetRxFilter command accepts the following classes: */
+enum RxFilter {
+	RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
+};
+
+/* Bits in the general status register. */
+enum corkscrew_status {
+	IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
+	TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
+	IntReq = 0x0040, StatsFull = 0x0080,
+	DMADone = 1 << 8, DownComplete = 1 << 9, UpComplete = 1 << 10,
+	DMAInProgress = 1 << 11,	/* DMA controller is still busy. */
+	CmdInProgress = 1 << 12,	/* EL3_CMD is still busy. */
+};
+
+/* Register window 1 offsets, the window used in normal operation.
+   On the Corkscrew this window is always mapped at offsets 0x10-0x1f. */
+enum Window1 {
+	TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14,
+	RxStatus = 0x18, Timer = 0x1A, TxStatus = 0x1B,
+	TxFree = 0x1C,		/* Remaining free bytes in Tx buffer. */
+};
+enum Window0 {
+	Wn0IRQ = 0x08,
+#if defined(CORKSCREW)
+	Wn0EepromCmd = 0x200A,	/* Corkscrew EEPROM command register. */
+	Wn0EepromData = 0x200C,	/* Corkscrew EEPROM results register. */
+#else
+	Wn0EepromCmd = 10,	/* Window 0: EEPROM command register. */
+	Wn0EepromData = 12,	/* Window 0: EEPROM results register. */
+#endif
+};
+enum Win0_EEPROM_bits {
+	EEPROM_Read = 0x80, EEPROM_WRITE = 0x40, EEPROM_ERASE = 0xC0,
+	EEPROM_EWENB = 0x30,	/* Enable erasing/writing for 10 msec. */
+	EEPROM_EWDIS = 0x00,	/* Disable EWENB before 10 msec timeout. */
+};
+
+/* EEPROM locations. */
+enum eeprom_offset {
+	PhysAddr01 = 0, PhysAddr23 = 1, PhysAddr45 = 2, ModelID = 3,
+	EtherLink3ID = 7,
+};
+
+enum Window3 {			/* Window 3: MAC/config bits. */
+	Wn3_Config = 0, Wn3_MAC_Ctrl = 6, Wn3_Options = 8,
+};
+enum wn3_config {
+	Ram_size = 7,
+	Ram_width = 8,
+	Ram_speed = 0x30,
+	Rom_size = 0xc0,
+	Ram_split_shift = 16,
+	Ram_split = 3 << Ram_split_shift,
+	Xcvr_shift = 20,
+	Xcvr = 7 << Xcvr_shift,
+	Autoselect = 0x1000000,
+};
+
+enum Window4 {
+	Wn4_NetDiag = 6, Wn4_Media = 10,	/* Window 4: Xcvr/media bits. */
+};
+enum Win4_Media_bits {
+	Media_SQE = 0x0008,	/* Enable SQE error counting for AUI. */
+	Media_10TP = 0x00C0,	/* Enable link beat and jabber for 10baseT. */
+	Media_Lnk = 0x0080,	/* Enable just link beat for 100TX/100FX. */
+	Media_LnkBeat = 0x0800,
+};
+enum Window7 {			/* Window 7: Bus Master control. */
+	Wn7_MasterAddr = 0, Wn7_MasterLen = 6, Wn7_MasterStatus = 12,
+};
+
+/* Boomerang-style bus master control registers.  Note ISA aliases! */
+enum MasterCtrl {
+	PktStatus = 0x400, DownListPtr = 0x404, FragAddr = 0x408, FragLen =
+	    0x40c,
+	TxFreeThreshold = 0x40f, UpPktStatus = 0x410, UpListPtr = 0x418,
+};
+
+/* The Rx and Tx descriptor lists.
+   Caution Alpha hackers: these types are 32 bits!  Note also the 8 byte
+   alignment contraint on tx_ring[] and rx_ring[]. */
+struct boom_rx_desc {
+	u32 next;
+	s32 status;
+	u32 addr;
+	s32 length;
+};
+
+/* Values for the Rx status entry. */
+enum rx_desc_status {
+	RxDComplete = 0x00008000, RxDError = 0x4000,
+	/* See boomerang_rx() for actual error bits */
+};
+
+struct boom_tx_desc {
+	u32 next;
+	s32 status;
+	u32 addr;
+	s32 length;
+};
+
+struct corkscrew_private {
+	const char *product_name;
+	struct list_head list;
+	struct net_device *our_dev;
+	/* The Rx and Tx rings are here to keep them quad-word-aligned. */
+	struct boom_rx_desc rx_ring[RX_RING_SIZE];
+	struct boom_tx_desc tx_ring[TX_RING_SIZE];
+	/* The addresses of transmit- and receive-in-place skbuffs. */
+	struct sk_buff *rx_skbuff[RX_RING_SIZE];
+	struct sk_buff *tx_skbuff[TX_RING_SIZE];
+	unsigned int cur_rx, cur_tx;	/* The next free ring entry */
+	unsigned int dirty_rx, dirty_tx;/* The ring entries to be free()ed. */
+	struct sk_buff *tx_skb;	/* Packet being eaten by bus master ctrl.  */
+	struct timer_list timer;	/* Media selection timer. */
+	int capabilities	;	/* Adapter capabilities word. */
+	int options;			/* User-settable misc. driver options. */
+	int last_rx_packets;		/* For media autoselection. */
+	unsigned int available_media:8,	/* From Wn3_Options */
+		media_override:3,	/* Passed-in media type. */
+		default_media:3,	/* Read from the EEPROM. */
+		full_duplex:1, autoselect:1, bus_master:1,	/* Vortex can only do a fragment bus-m. */
+		full_bus_master_tx:1, full_bus_master_rx:1,	/* Boomerang  */
+		tx_full:1;
+	spinlock_t lock;
+	struct device *dev;
+};
+
+/* The action to take with a media selection timer tick.
+   Note that we deviate from the 3Com order by checking 10base2 before AUI.
+ */
+enum xcvr_types {
+	XCVR_10baseT = 0, XCVR_AUI, XCVR_10baseTOnly, XCVR_10base2, XCVR_100baseTx,
+	XCVR_100baseFx, XCVR_MII = 6, XCVR_Default = 8,
+};
+
+static struct media_table {
+	char *name;
+	unsigned int media_bits:16,	/* Bits to set in Wn4_Media register. */
+		mask:8,			/* The transceiver-present bit in Wn3_Config. */
+		next:8;			/* The media type to try next. */
+	short wait;			/* Time before we check media status. */
+} media_tbl[] = {
+	{ "10baseT", Media_10TP, 0x08, XCVR_10base2, (14 * HZ) / 10 },
+	{ "10Mbs AUI", Media_SQE, 0x20, XCVR_Default, (1 * HZ) / 10},
+	{ "undefined", 0, 0x80, XCVR_10baseT, 10000},
+	{ "10base2", 0, 0x10, XCVR_AUI, (1 * HZ) / 10},
+	{ "100baseTX", Media_Lnk, 0x02, XCVR_100baseFx, (14 * HZ) / 10},
+	{ "100baseFX", Media_Lnk, 0x04, XCVR_MII, (14 * HZ) / 10},
+	{ "MII", 0, 0x40, XCVR_10baseT, 3 * HZ},
+	{ "undefined", 0, 0x01, XCVR_10baseT, 10000},
+	{ "Default", 0, 0xFF, XCVR_10baseT, 10000},
+};
+
+#ifdef __ISAPNP__
+static struct isapnp_device_id corkscrew_isapnp_adapters[] = {
+	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
+		ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5051),
+		(long) "3Com Fast EtherLink ISA" },
+	{ }	/* terminate list */
+};
+
+MODULE_DEVICE_TABLE(isapnp, corkscrew_isapnp_adapters);
+
+static int nopnp;
+#endif /* __ISAPNP__ */
+
+static struct net_device *corkscrew_scan(int unit);
+static int corkscrew_setup(struct net_device *dev, int ioaddr,
+			    struct pnp_dev *idev, int card_number);
+static int corkscrew_open(struct net_device *dev);
+static void corkscrew_timer(unsigned long arg);
+static netdev_tx_t corkscrew_start_xmit(struct sk_buff *skb,
+					struct net_device *dev);
+static int corkscrew_rx(struct net_device *dev);
+static void corkscrew_timeout(struct net_device *dev);
+static int boomerang_rx(struct net_device *dev);
+static irqreturn_t corkscrew_interrupt(int irq, void *dev_id);
+static int corkscrew_close(struct net_device *dev);
+static void update_stats(int addr, struct net_device *dev);
+static struct net_device_stats *corkscrew_get_stats(struct net_device *dev);
+static void set_rx_mode(struct net_device *dev);
+static const struct ethtool_ops netdev_ethtool_ops;
+
+
+/*
+   Unfortunately maximizing the shared code between the integrated and
+   module version of the driver results in a complicated set of initialization
+   procedures.
+   init_module() -- modules /  tc59x_init()  -- built-in
+		The wrappers for corkscrew_scan()
+   corkscrew_scan()  		 The common routine that scans for PCI and EISA cards
+   corkscrew_found_device() Allocate a device structure when we find a card.
+					Different versions exist for modules and built-in.
+   corkscrew_probe1()		Fill in the device structure -- this is separated
+					so that the modules code can put it in dev->init.
+*/
+/* This driver uses 'options' to pass the media type, full-duplex flag, etc. */
+/* Note: this is the only limit on the number of cards supported!! */
+static int options[MAX_UNITS] = { -1, -1, -1, -1, -1, -1, -1, -1, };
+
+#ifdef MODULE
+static int debug = -1;
+
+module_param(debug, int, 0);
+module_param_array(options, int, NULL, 0);
+module_param(rx_copybreak, int, 0);
+module_param(max_interrupt_work, int, 0);
+MODULE_PARM_DESC(debug, "3c515 debug level (0-6)");
+MODULE_PARM_DESC(options, "3c515: Bits 0-2: media type, bit 3: full duplex, bit 4: bus mastering");
+MODULE_PARM_DESC(rx_copybreak, "3c515 copy breakpoint for copy-only-tiny-frames");
+MODULE_PARM_DESC(max_interrupt_work, "3c515 maximum events handled per interrupt");
+
+/* A list of all installed Vortex devices, for removing the driver module. */
+/* we will need locking (and refcounting) if we ever use it for more */
+static LIST_HEAD(root_corkscrew_dev);
+
+int init_module(void)
+{
+	int found = 0;
+	if (debug >= 0)
+		corkscrew_debug = debug;
+	if (corkscrew_debug)
+		pr_debug("%s", version);
+	while (corkscrew_scan(-1))
+		found++;
+	return found ? 0 : -ENODEV;
+}
+
+#else
+struct net_device *tc515_probe(int unit)
+{
+	struct net_device *dev = corkscrew_scan(unit);
+	static int printed;
+
+	if (!dev)
+		return ERR_PTR(-ENODEV);
+
+	if (corkscrew_debug > 0 && !printed) {
+		printed = 1;
+		pr_debug("%s", version);
+	}
+
+	return dev;
+}
+#endif				/* not MODULE */
+
+static int check_device(unsigned ioaddr)
+{
+	int timer;
+
+	if (!request_region(ioaddr, CORKSCREW_TOTAL_SIZE, "3c515"))
+		return 0;
+	/* Check the resource configuration for a matching ioaddr. */
+	if ((inw(ioaddr + 0x2002) & 0x1f0) != (ioaddr & 0x1f0)) {
+		release_region(ioaddr, CORKSCREW_TOTAL_SIZE);
+		return 0;
+	}
+	/* Verify by reading the device ID from the EEPROM. */
+	outw(EEPROM_Read + 7, ioaddr + Wn0EepromCmd);
+	/* Pause for at least 162 us. for the read to take place. */
+	for (timer = 4; timer >= 0; timer--) {
+		udelay(162);
+		if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
+			break;
+	}
+	if (inw(ioaddr + Wn0EepromData) != 0x6d50) {
+		release_region(ioaddr, CORKSCREW_TOTAL_SIZE);
+		return 0;
+	}
+	return 1;
+}
+
+static void cleanup_card(struct net_device *dev)
+{
+	struct corkscrew_private *vp = netdev_priv(dev);
+	list_del_init(&vp->list);
+	if (dev->dma)
+		free_dma(dev->dma);
+	outw(TotalReset, dev->base_addr + EL3_CMD);
+	release_region(dev->base_addr, CORKSCREW_TOTAL_SIZE);
+	if (vp->dev)
+		pnp_device_detach(to_pnp_dev(vp->dev));
+}
+
+static struct net_device *corkscrew_scan(int unit)
+{
+	struct net_device *dev;
+	static int cards_found = 0;
+	static int ioaddr;
+	int err;
+#ifdef __ISAPNP__
+	short i;
+	static int pnp_cards;
+#endif
+
+	dev = alloc_etherdev(sizeof(struct corkscrew_private));
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	if (unit >= 0) {
+		sprintf(dev->name, "eth%d", unit);
+		netdev_boot_setup_check(dev);
+	}
+
+#ifdef __ISAPNP__
+	if(nopnp == 1)
+		goto no_pnp;
+	for(i=0; corkscrew_isapnp_adapters[i].vendor != 0; i++) {
+		struct pnp_dev *idev = NULL;
+		int irq;
+		while((idev = pnp_find_dev(NULL,
+					   corkscrew_isapnp_adapters[i].vendor,
+					   corkscrew_isapnp_adapters[i].function,
+					   idev))) {
+
+			if (pnp_device_attach(idev) < 0)
+				continue;
+			if (pnp_activate_dev(idev) < 0) {
+				pr_warning("pnp activate failed (out of resources?)\n");
+				pnp_device_detach(idev);
+				continue;
+			}
+			if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
+				pnp_device_detach(idev);
+				continue;
+			}
+			ioaddr = pnp_port_start(idev, 0);
+			irq = pnp_irq(idev, 0);
+			if (!check_device(ioaddr)) {
+				pnp_device_detach(idev);
+				continue;
+			}
+			if(corkscrew_debug)
+				pr_debug("ISAPNP reports %s at i/o 0x%x, irq %d\n",
+					(char*) corkscrew_isapnp_adapters[i].driver_data, ioaddr, irq);
+			pr_info("3c515 Resource configuration register %#4.4x, DCR %4.4x.\n",
+		     		inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
+			/* irq = inw(ioaddr + 0x2002) & 15; */ /* Use the irq from isapnp */
+			SET_NETDEV_DEV(dev, &idev->dev);
+			pnp_cards++;
+			err = corkscrew_setup(dev, ioaddr, idev, cards_found++);
+			if (!err)
+				return dev;
+			cleanup_card(dev);
+		}
+	}
+no_pnp:
+#endif /* __ISAPNP__ */
+
+	/* Check all locations on the ISA bus -- evil! */
+	for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x20) {
+		if (!check_device(ioaddr))
+			continue;
+
+		pr_info("3c515 Resource configuration register %#4.4x, DCR %4.4x.\n",
+		     inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
+		err = corkscrew_setup(dev, ioaddr, NULL, cards_found++);
+		if (!err)
+			return dev;
+		cleanup_card(dev);
+	}
+	free_netdev(dev);
+	return NULL;
+}
+
+
+static const struct net_device_ops netdev_ops = {
+	.ndo_open		= corkscrew_open,
+	.ndo_stop		= corkscrew_close,
+	.ndo_start_xmit		= corkscrew_start_xmit,
+	.ndo_tx_timeout		= corkscrew_timeout,
+	.ndo_get_stats		= corkscrew_get_stats,
+	.ndo_set_multicast_list = set_rx_mode,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_set_mac_address 	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+};
+
+
+static int corkscrew_setup(struct net_device *dev, int ioaddr,
+			    struct pnp_dev *idev, int card_number)
+{
+	struct corkscrew_private *vp = netdev_priv(dev);
+	unsigned int eeprom[0x40], checksum = 0;	/* EEPROM contents */
+	int i;
+	int irq;
+
+#ifdef __ISAPNP__
+	if (idev) {
+		irq = pnp_irq(idev, 0);
+		vp->dev = &idev->dev;
+	} else {
+		irq = inw(ioaddr + 0x2002) & 15;
+	}
+#else
+	irq = inw(ioaddr + 0x2002) & 15;
+#endif
+
+	dev->base_addr = ioaddr;
+	dev->irq = irq;
+	dev->dma = inw(ioaddr + 0x2000) & 7;
+	vp->product_name = "3c515";
+	vp->options = dev->mem_start;
+	vp->our_dev = dev;
+
+	if (!vp->options) {
+		 if (card_number >= MAX_UNITS)
+			vp->options = -1;
+		else
+			vp->options = options[card_number];
+	}
+
+	if (vp->options >= 0) {
+		vp->media_override = vp->options & 7;
+		if (vp->media_override == 2)
+			vp->media_override = 0;
+		vp->full_duplex = (vp->options & 8) ? 1 : 0;
+		vp->bus_master = (vp->options & 16) ? 1 : 0;
+	} else {
+		vp->media_override = 7;
+		vp->full_duplex = 0;
+		vp->bus_master = 0;
+	}
+#ifdef MODULE
+	list_add(&vp->list, &root_corkscrew_dev);
+#endif
+
+	pr_info("%s: 3Com %s at %#3x,", dev->name, vp->product_name, ioaddr);
+
+	spin_lock_init(&vp->lock);
+
+	/* Read the station address from the EEPROM. */
+	EL3WINDOW(0);
+	for (i = 0; i < 0x18; i++) {
+		__be16 *phys_addr = (__be16 *) dev->dev_addr;
+		int timer;
+		outw(EEPROM_Read + i, ioaddr + Wn0EepromCmd);
+		/* Pause for at least 162 us. for the read to take place. */
+		for (timer = 4; timer >= 0; timer--) {
+			udelay(162);
+			if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
+				break;
+		}
+		eeprom[i] = inw(ioaddr + Wn0EepromData);
+		checksum ^= eeprom[i];
+		if (i < 3)
+			phys_addr[i] = htons(eeprom[i]);
+	}
+	checksum = (checksum ^ (checksum >> 8)) & 0xff;
+	if (checksum != 0x00)
+		pr_cont(" ***INVALID CHECKSUM %4.4x*** ", checksum);
+	pr_cont(" %pM", dev->dev_addr);
+	if (eeprom[16] == 0x11c7) {	/* Corkscrew */
+		if (request_dma(dev->dma, "3c515")) {
+			pr_cont(", DMA %d allocation failed", dev->dma);
+			dev->dma = 0;
+		} else
+			pr_cont(", DMA %d", dev->dma);
+	}
+	pr_cont(", IRQ %d\n", dev->irq);
+	/* Tell them about an invalid IRQ. */
+	if (corkscrew_debug && (dev->irq <= 0 || dev->irq > 15))
+		pr_warning(" *** Warning: this IRQ is unlikely to work! ***\n");
+
+	{
+		static const char * const ram_split[] = {
+			"5:3", "3:1", "1:1", "3:5"
+		};
+		__u32 config;
+		EL3WINDOW(3);
+		vp->available_media = inw(ioaddr + Wn3_Options);
+		config = inl(ioaddr + Wn3_Config);
+		if (corkscrew_debug > 1)
+			pr_info("  Internal config register is %4.4x, transceivers %#x.\n",
+				config, inw(ioaddr + Wn3_Options));
+		pr_info("  %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n",
+			8 << config & Ram_size,
+			config & Ram_width ? "word" : "byte",
+			ram_split[(config & Ram_split) >> Ram_split_shift],
+			config & Autoselect ? "autoselect/" : "",
+			media_tbl[(config & Xcvr) >> Xcvr_shift].name);
+		vp->default_media = (config & Xcvr) >> Xcvr_shift;
+		vp->autoselect = config & Autoselect ? 1 : 0;
+		dev->if_port = vp->default_media;
+	}
+	if (vp->media_override != 7) {
+		pr_info("  Media override to transceiver type %d (%s).\n",
+		       vp->media_override,
+		       media_tbl[vp->media_override].name);
+		dev->if_port = vp->media_override;
+	}
+
+	vp->capabilities = eeprom[16];
+	vp->full_bus_master_tx = (vp->capabilities & 0x20) ? 1 : 0;
+	/* Rx is broken at 10mbps, so we always disable it. */
+	/* vp->full_bus_master_rx = 0; */
+	vp->full_bus_master_rx = (vp->capabilities & 0x20) ? 1 : 0;
+
+	/* The 3c51x-specific entries in the device structure. */
+	dev->netdev_ops = &netdev_ops;
+	dev->watchdog_timeo = (400 * HZ) / 1000;
+	dev->ethtool_ops = &netdev_ethtool_ops;
+
+	return register_netdev(dev);
+}
+
+
+static int corkscrew_open(struct net_device *dev)
+{
+	int ioaddr = dev->base_addr;
+	struct corkscrew_private *vp = netdev_priv(dev);
+	__u32 config;
+	int i;
+
+	/* Before initializing select the active media port. */
+	EL3WINDOW(3);
+	if (vp->full_duplex)
+		outb(0x20, ioaddr + Wn3_MAC_Ctrl);	/* Set the full-duplex bit. */
+	config = inl(ioaddr + Wn3_Config);
+
+	if (vp->media_override != 7) {
+		if (corkscrew_debug > 1)
+			pr_info("%s: Media override to transceiver %d (%s).\n",
+				dev->name, vp->media_override,
+				media_tbl[vp->media_override].name);
+		dev->if_port = vp->media_override;
+	} else if (vp->autoselect) {
+		/* Find first available media type, starting with 100baseTx. */
+		dev->if_port = 4;
+		while (!(vp->available_media & media_tbl[dev->if_port].mask))
+			dev->if_port = media_tbl[dev->if_port].next;
+
+		if (corkscrew_debug > 1)
+			pr_debug("%s: Initial media type %s.\n",
+			       dev->name, media_tbl[dev->if_port].name);
+
+		init_timer(&vp->timer);
+		vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
+		vp->timer.data = (unsigned long) dev;
+		vp->timer.function = corkscrew_timer;	/* timer handler */
+		add_timer(&vp->timer);
+	} else
+		dev->if_port = vp->default_media;
+
+	config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
+	outl(config, ioaddr + Wn3_Config);
+
+	if (corkscrew_debug > 1) {
+		pr_debug("%s: corkscrew_open() InternalConfig %8.8x.\n",
+		       dev->name, config);
+	}
+
+	outw(TxReset, ioaddr + EL3_CMD);
+	for (i = 20; i >= 0; i--)
+		if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
+			break;
+
+	outw(RxReset, ioaddr + EL3_CMD);
+	/* Wait a few ticks for the RxReset command to complete. */
+	for (i = 20; i >= 0; i--)
+		if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
+			break;
+
+	outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
+
+	/* Use the now-standard shared IRQ implementation. */
+	if (vp->capabilities == 0x11c7) {
+		/* Corkscrew: Cannot share ISA resources. */
+		if (dev->irq == 0 ||
+		    dev->dma == 0 ||
+		    request_irq(dev->irq, corkscrew_interrupt, 0,
+				vp->product_name, dev))
+			return -EAGAIN;
+		enable_dma(dev->dma);
+		set_dma_mode(dev->dma, DMA_MODE_CASCADE);
+	} else if (request_irq(dev->irq, corkscrew_interrupt, IRQF_SHARED,
+			       vp->product_name, dev)) {
+		return -EAGAIN;
+	}
+
+	if (corkscrew_debug > 1) {
+		EL3WINDOW(4);
+		pr_debug("%s: corkscrew_open() irq %d media status %4.4x.\n",
+		       dev->name, dev->irq, inw(ioaddr + Wn4_Media));
+	}
+
+	/* Set the station address and mask in window 2 each time opened. */
+	EL3WINDOW(2);
+	for (i = 0; i < 6; i++)
+		outb(dev->dev_addr[i], ioaddr + i);
+	for (; i < 12; i += 2)
+		outw(0, ioaddr + i);
+
+	if (dev->if_port == 3)
+		/* Start the thinnet transceiver. We should really wait 50ms... */
+		outw(StartCoax, ioaddr + EL3_CMD);
+	EL3WINDOW(4);
+	outw((inw(ioaddr + Wn4_Media) & ~(Media_10TP | Media_SQE)) |
+	     media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media);
+
+	/* Switch to the stats window, and clear all stats by reading. */
+	outw(StatsDisable, ioaddr + EL3_CMD);
+	EL3WINDOW(6);
+	for (i = 0; i < 10; i++)
+		inb(ioaddr + i);
+	inw(ioaddr + 10);
+	inw(ioaddr + 12);
+	/* New: On the Vortex we must also clear the BadSSD counter. */
+	EL3WINDOW(4);
+	inb(ioaddr + 12);
+	/* ..and on the Boomerang we enable the extra statistics bits. */
+	outw(0x0040, ioaddr + Wn4_NetDiag);
+
+	/* Switch to register set 7 for normal use. */
+	EL3WINDOW(7);
+
+	if (vp->full_bus_master_rx) {	/* Boomerang bus master. */
+		vp->cur_rx = vp->dirty_rx = 0;
+		if (corkscrew_debug > 2)
+			pr_debug("%s:  Filling in the Rx ring.\n", dev->name);
+		for (i = 0; i < RX_RING_SIZE; i++) {
+			struct sk_buff *skb;
+			if (i < (RX_RING_SIZE - 1))
+				vp->rx_ring[i].next =
+				    isa_virt_to_bus(&vp->rx_ring[i + 1]);
+			else
+				vp->rx_ring[i].next = 0;
+			vp->rx_ring[i].status = 0;	/* Clear complete bit. */
+			vp->rx_ring[i].length = PKT_BUF_SZ | 0x80000000;
+			skb = dev_alloc_skb(PKT_BUF_SZ);
+			vp->rx_skbuff[i] = skb;
+			if (skb == NULL)
+				break;	/* Bad news!  */
+			skb->dev = dev;	/* Mark as being used by this device. */
+			skb_reserve(skb, 2);	/* Align IP on 16 byte boundaries */
+			vp->rx_ring[i].addr = isa_virt_to_bus(skb->data);
+		}
+		if (i != 0)
+			vp->rx_ring[i - 1].next =
+				isa_virt_to_bus(&vp->rx_ring[0]);	/* Wrap the ring. */
+		outl(isa_virt_to_bus(&vp->rx_ring[0]), ioaddr + UpListPtr);
+	}
+	if (vp->full_bus_master_tx) {	/* Boomerang bus master Tx. */
+		vp->cur_tx = vp->dirty_tx = 0;
+		outb(PKT_BUF_SZ >> 8, ioaddr + TxFreeThreshold);	/* Room for a packet. */
+		/* Clear the Tx ring. */
+		for (i = 0; i < TX_RING_SIZE; i++)
+			vp->tx_skbuff[i] = NULL;
+		outl(0, ioaddr + DownListPtr);
+	}
+	/* Set receiver mode: presumably accept b-case and phys addr only. */
+	set_rx_mode(dev);
+	outw(StatsEnable, ioaddr + EL3_CMD);	/* Turn on statistics. */
+
+	netif_start_queue(dev);
+
+	outw(RxEnable, ioaddr + EL3_CMD);	/* Enable the receiver. */
+	outw(TxEnable, ioaddr + EL3_CMD);	/* Enable transmitter. */
+	/* Allow status bits to be seen. */
+	outw(SetStatusEnb | AdapterFailure | IntReq | StatsFull |
+	     (vp->full_bus_master_tx ? DownComplete : TxAvailable) |
+	     (vp->full_bus_master_rx ? UpComplete : RxComplete) |
+	     (vp->bus_master ? DMADone : 0), ioaddr + EL3_CMD);
+	/* Ack all pending events, and set active indicator mask. */
+	outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
+	     ioaddr + EL3_CMD);
+	outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
+	     | (vp->bus_master ? DMADone : 0) | UpComplete | DownComplete,
+	     ioaddr + EL3_CMD);
+
+	return 0;
+}
+
+static void corkscrew_timer(unsigned long data)
+{
+#ifdef AUTOMEDIA
+	struct net_device *dev = (struct net_device *) data;
+	struct corkscrew_private *vp = netdev_priv(dev);
+	int ioaddr = dev->base_addr;
+	unsigned long flags;
+	int ok = 0;
+
+	if (corkscrew_debug > 1)
+		pr_debug("%s: Media selection timer tick happened, %s.\n",
+		       dev->name, media_tbl[dev->if_port].name);
+
+	spin_lock_irqsave(&vp->lock, flags);
+
+	{
+		int old_window = inw(ioaddr + EL3_CMD) >> 13;
+		int media_status;
+		EL3WINDOW(4);
+		media_status = inw(ioaddr + Wn4_Media);
+		switch (dev->if_port) {
+		case 0:
+		case 4:
+		case 5:	/* 10baseT, 100baseTX, 100baseFX  */
+			if (media_status & Media_LnkBeat) {
+				ok = 1;
+				if (corkscrew_debug > 1)
+					pr_debug("%s: Media %s has link beat, %x.\n",
+						dev->name,
+						media_tbl[dev->if_port].name,
+						media_status);
+			} else if (corkscrew_debug > 1)
+				pr_debug("%s: Media %s is has no link beat, %x.\n",
+					dev->name,
+					media_tbl[dev->if_port].name,
+					media_status);
+
+			break;
+		default:	/* Other media types handled by Tx timeouts. */
+			if (corkscrew_debug > 1)
+				pr_debug("%s: Media %s is has no indication, %x.\n",
+					dev->name,
+					media_tbl[dev->if_port].name,
+					media_status);
+			ok = 1;
+		}
+		if (!ok) {
+			__u32 config;
+
+			do {
+				dev->if_port =
+				    media_tbl[dev->if_port].next;
+			}
+			while (!(vp->available_media & media_tbl[dev->if_port].mask));
+
+			if (dev->if_port == 8) {	/* Go back to default. */
+				dev->if_port = vp->default_media;
+				if (corkscrew_debug > 1)
+					pr_debug("%s: Media selection failing, using default %s port.\n",
+						dev->name,
+						media_tbl[dev->if_port].name);
+			} else {
+				if (corkscrew_debug > 1)
+					pr_debug("%s: Media selection failed, now trying %s port.\n",
+						dev->name,
+						media_tbl[dev->if_port].name);
+				vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
+				add_timer(&vp->timer);
+			}
+			outw((media_status & ~(Media_10TP | Media_SQE)) |
+			     media_tbl[dev->if_port].media_bits,
+			     ioaddr + Wn4_Media);
+
+			EL3WINDOW(3);
+			config = inl(ioaddr + Wn3_Config);
+			config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
+			outl(config, ioaddr + Wn3_Config);
+
+			outw(dev->if_port == 3 ? StartCoax : StopCoax,
+			     ioaddr + EL3_CMD);
+		}
+		EL3WINDOW(old_window);
+	}
+
+	spin_unlock_irqrestore(&vp->lock, flags);
+	if (corkscrew_debug > 1)
+		pr_debug("%s: Media selection timer finished, %s.\n",
+		       dev->name, media_tbl[dev->if_port].name);
+
+#endif				/* AUTOMEDIA */
+}
+
+static void corkscrew_timeout(struct net_device *dev)
+{
+	int i;
+	struct corkscrew_private *vp = netdev_priv(dev);
+	int ioaddr = dev->base_addr;
+
+	pr_warning("%s: transmit timed out, tx_status %2.2x status %4.4x.\n",
+	       dev->name, inb(ioaddr + TxStatus),
+	       inw(ioaddr + EL3_STATUS));
+	/* Slight code bloat to be user friendly. */
+	if ((inb(ioaddr + TxStatus) & 0x88) == 0x88)
+		pr_warning("%s: Transmitter encountered 16 collisions --"
+		       " network cable problem?\n", dev->name);
+#ifndef final_version
+	pr_debug("  Flags; bus-master %d, full %d; dirty %d current %d.\n",
+	       vp->full_bus_master_tx, vp->tx_full, vp->dirty_tx,
+	       vp->cur_tx);
+	pr_debug("  Down list %8.8x vs. %p.\n", inl(ioaddr + DownListPtr),
+	       &vp->tx_ring[0]);
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		pr_debug("  %d: %p  length %8.8x status %8.8x\n", i,
+		       &vp->tx_ring[i],
+		       vp->tx_ring[i].length, vp->tx_ring[i].status);
+	}
+#endif
+	/* Issue TX_RESET and TX_START commands. */
+	outw(TxReset, ioaddr + EL3_CMD);
+	for (i = 20; i >= 0; i--)
+		if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
+			break;
+	outw(TxEnable, ioaddr + EL3_CMD);
+	dev->trans_start = jiffies; /* prevent tx timeout */
+	dev->stats.tx_errors++;
+	dev->stats.tx_dropped++;
+	netif_wake_queue(dev);
+}
+
+static netdev_tx_t corkscrew_start_xmit(struct sk_buff *skb,
+					struct net_device *dev)
+{
+	struct corkscrew_private *vp = netdev_priv(dev);
+	int ioaddr = dev->base_addr;
+
+	/* Block a timer-based transmit from overlapping. */
+
+	netif_stop_queue(dev);
+
+	if (vp->full_bus_master_tx) {	/* BOOMERANG bus-master */
+		/* Calculate the next Tx descriptor entry. */
+		int entry = vp->cur_tx % TX_RING_SIZE;
+		struct boom_tx_desc *prev_entry;
+		unsigned long flags;
+		int i;
+
+		if (vp->tx_full)	/* No room to transmit with */
+			return NETDEV_TX_BUSY;
+		if (vp->cur_tx != 0)
+			prev_entry = &vp->tx_ring[(vp->cur_tx - 1) % TX_RING_SIZE];
+		else
+			prev_entry = NULL;
+		if (corkscrew_debug > 3)
+			pr_debug("%s: Trying to send a packet, Tx index %d.\n",
+				dev->name, vp->cur_tx);
+		/* vp->tx_full = 1; */
+		vp->tx_skbuff[entry] = skb;
+		vp->tx_ring[entry].next = 0;
+		vp->tx_ring[entry].addr = isa_virt_to_bus(skb->data);
+		vp->tx_ring[entry].length = skb->len | 0x80000000;
+		vp->tx_ring[entry].status = skb->len | 0x80000000;
+
+		spin_lock_irqsave(&vp->lock, flags);
+		outw(DownStall, ioaddr + EL3_CMD);
+		/* Wait for the stall to complete. */
+		for (i = 20; i >= 0; i--)
+			if ((inw(ioaddr + EL3_STATUS) & CmdInProgress) == 0)
+				break;
+		if (prev_entry)
+			prev_entry->next = isa_virt_to_bus(&vp->tx_ring[entry]);
+		if (inl(ioaddr + DownListPtr) == 0) {
+			outl(isa_virt_to_bus(&vp->tx_ring[entry]),
+			     ioaddr + DownListPtr);
+			queued_packet++;
+		}
+		outw(DownUnstall, ioaddr + EL3_CMD);
+		spin_unlock_irqrestore(&vp->lock, flags);
+
+		vp->cur_tx++;
+		if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1)
+			vp->tx_full = 1;
+		else {		/* Clear previous interrupt enable. */
+			if (prev_entry)
+				prev_entry->status &= ~0x80000000;
+			netif_wake_queue(dev);
+		}
+		return NETDEV_TX_OK;
+	}
+	/* Put out the doubleword header... */
+	outl(skb->len, ioaddr + TX_FIFO);
+	dev->stats.tx_bytes += skb->len;
+#ifdef VORTEX_BUS_MASTER
+	if (vp->bus_master) {
+		/* Set the bus-master controller to transfer the packet. */
+		outl((int) (skb->data), ioaddr + Wn7_MasterAddr);
+		outw((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen);
+		vp->tx_skb = skb;
+		outw(StartDMADown, ioaddr + EL3_CMD);
+		/* queue will be woken at the DMADone interrupt. */
+	} else {
+		/* ... and the packet rounded to a doubleword. */
+		outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
+		dev_kfree_skb(skb);
+		if (inw(ioaddr + TxFree) > 1536) {
+			netif_wake_queue(dev);
+		} else
+			/* Interrupt us when the FIFO has room for max-sized packet. */
+			outw(SetTxThreshold + (1536 >> 2),
+			     ioaddr + EL3_CMD);
+	}
+#else
+	/* ... and the packet rounded to a doubleword. */
+	outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
+	dev_kfree_skb(skb);
+	if (inw(ioaddr + TxFree) > 1536) {
+		netif_wake_queue(dev);
+	} else
+		/* Interrupt us when the FIFO has room for max-sized packet. */
+		outw(SetTxThreshold + (1536 >> 2), ioaddr + EL3_CMD);
+#endif				/* bus master */
+
+
+	/* Clear the Tx status stack. */
+	{
+		short tx_status;
+		int i = 4;
+
+		while (--i > 0 && (tx_status = inb(ioaddr + TxStatus)) > 0) {
+			if (tx_status & 0x3C) {	/* A Tx-disabling error occurred.  */
+				if (corkscrew_debug > 2)
+					pr_debug("%s: Tx error, status %2.2x.\n",
+						dev->name, tx_status);
+				if (tx_status & 0x04)
+					dev->stats.tx_fifo_errors++;
+				if (tx_status & 0x38)
+					dev->stats.tx_aborted_errors++;
+				if (tx_status & 0x30) {
+					int j;
+					outw(TxReset, ioaddr + EL3_CMD);
+					for (j = 20; j >= 0; j--)
+						if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
+							break;
+				}
+				outw(TxEnable, ioaddr + EL3_CMD);
+			}
+			outb(0x00, ioaddr + TxStatus);	/* Pop the status stack. */
+		}
+	}
+	return NETDEV_TX_OK;
+}
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+   after the Tx thread. */
+
+static irqreturn_t corkscrew_interrupt(int irq, void *dev_id)
+{
+	/* Use the now-standard shared IRQ implementation. */
+	struct net_device *dev = dev_id;
+	struct corkscrew_private *lp = netdev_priv(dev);
+	int ioaddr, status;
+	int latency;
+	int i = max_interrupt_work;
+
+	ioaddr = dev->base_addr;
+	latency = inb(ioaddr + Timer);
+
+	spin_lock(&lp->lock);
+
+	status = inw(ioaddr + EL3_STATUS);
+
+	if (corkscrew_debug > 4)
+		pr_debug("%s: interrupt, status %4.4x, timer %d.\n",
+			dev->name, status, latency);
+	if ((status & 0xE000) != 0xE000) {
+		static int donedidthis;
+		/* Some interrupt controllers store a bogus interrupt from boot-time.
+		   Ignore a single early interrupt, but don't hang the machine for
+		   other interrupt problems. */
+		if (donedidthis++ > 100) {
+			pr_err("%s: Bogus interrupt, bailing. Status %4.4x, start=%d.\n",
+				   dev->name, status, netif_running(dev));
+			free_irq(dev->irq, dev);
+			dev->irq = -1;
+		}
+	}
+
+	do {
+		if (corkscrew_debug > 5)
+			pr_debug("%s: In interrupt loop, status %4.4x.\n",
+			       dev->name, status);
+		if (status & RxComplete)
+			corkscrew_rx(dev);
+
+		if (status & TxAvailable) {
+			if (corkscrew_debug > 5)
+				pr_debug("	TX room bit was handled.\n");
+			/* There's room in the FIFO for a full-sized packet. */
+			outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
+			netif_wake_queue(dev);
+		}
+		if (status & DownComplete) {
+			unsigned int dirty_tx = lp->dirty_tx;
+
+			while (lp->cur_tx - dirty_tx > 0) {
+				int entry = dirty_tx % TX_RING_SIZE;
+				if (inl(ioaddr + DownListPtr) == isa_virt_to_bus(&lp->tx_ring[entry]))
+					break;	/* It still hasn't been processed. */
+				if (lp->tx_skbuff[entry]) {
+					dev_kfree_skb_irq(lp->tx_skbuff[entry]);
+					lp->tx_skbuff[entry] = NULL;
+				}
+				dirty_tx++;
+			}
+			lp->dirty_tx = dirty_tx;
+			outw(AckIntr | DownComplete, ioaddr + EL3_CMD);
+			if (lp->tx_full && (lp->cur_tx - dirty_tx <= TX_RING_SIZE - 1)) {
+				lp->tx_full = 0;
+				netif_wake_queue(dev);
+			}
+		}
+#ifdef VORTEX_BUS_MASTER
+		if (status & DMADone) {
+			outw(0x1000, ioaddr + Wn7_MasterStatus);	/* Ack the event. */
+			dev_kfree_skb_irq(lp->tx_skb);	/* Release the transferred buffer */
+			netif_wake_queue(dev);
+		}
+#endif
+		if (status & UpComplete) {
+			boomerang_rx(dev);
+			outw(AckIntr | UpComplete, ioaddr + EL3_CMD);
+		}
+		if (status & (AdapterFailure | RxEarly | StatsFull)) {
+			/* Handle all uncommon interrupts at once. */
+			if (status & RxEarly) {	/* Rx early is unused. */
+				corkscrew_rx(dev);
+				outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
+			}
+			if (status & StatsFull) {	/* Empty statistics. */
+				static int DoneDidThat;
+				if (corkscrew_debug > 4)
+					pr_debug("%s: Updating stats.\n", dev->name);
+				update_stats(ioaddr, dev);
+				/* DEBUG HACK: Disable statistics as an interrupt source. */
+				/* This occurs when we have the wrong media type! */
+				if (DoneDidThat == 0 && inw(ioaddr + EL3_STATUS) & StatsFull) {
+					int win, reg;
+					pr_notice("%s: Updating stats failed, disabling stats as an interrupt source.\n",
+						dev->name);
+					for (win = 0; win < 8; win++) {
+						EL3WINDOW(win);
+						pr_notice("Vortex window %d:", win);
+						for (reg = 0; reg < 16; reg++)
+							pr_cont(" %2.2x", inb(ioaddr + reg));
+						pr_cont("\n");
+					}
+					EL3WINDOW(7);
+					outw(SetIntrEnb | TxAvailable |
+					     RxComplete | AdapterFailure |
+					     UpComplete | DownComplete |
+					     TxComplete, ioaddr + EL3_CMD);
+					DoneDidThat++;
+				}
+			}
+			if (status & AdapterFailure) {
+				/* Adapter failure requires Rx reset and reinit. */
+				outw(RxReset, ioaddr + EL3_CMD);
+				/* Set the Rx filter to the current state. */
+				set_rx_mode(dev);
+				outw(RxEnable, ioaddr + EL3_CMD);	/* Re-enable the receiver. */
+				outw(AckIntr | AdapterFailure,
+				     ioaddr + EL3_CMD);
+			}
+		}
+
+		if (--i < 0) {
+			pr_err("%s: Too much work in interrupt, status %4.4x. Disabling functions (%4.4x).\n",
+				dev->name, status, SetStatusEnb | ((~status) & 0x7FE));
+			/* Disable all pending interrupts. */
+			outw(SetStatusEnb | ((~status) & 0x7FE), ioaddr + EL3_CMD);
+			outw(AckIntr | 0x7FF, ioaddr + EL3_CMD);
+			break;
+		}
+		/* Acknowledge the IRQ. */
+		outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
+
+	} while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete));
+
+	spin_unlock(&lp->lock);
+
+	if (corkscrew_debug > 4)
+		pr_debug("%s: exiting interrupt, status %4.4x.\n", dev->name, status);
+	return IRQ_HANDLED;
+}
+
+static int corkscrew_rx(struct net_device *dev)
+{
+	int ioaddr = dev->base_addr;
+	int i;
+	short rx_status;
+
+	if (corkscrew_debug > 5)
+		pr_debug("   In rx_packet(), status %4.4x, rx_status %4.4x.\n",
+		     inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
+	while ((rx_status = inw(ioaddr + RxStatus)) > 0) {
+		if (rx_status & 0x4000) {	/* Error, update stats. */
+			unsigned char rx_error = inb(ioaddr + RxErrors);
+			if (corkscrew_debug > 2)
+				pr_debug(" Rx error: status %2.2x.\n",
+				       rx_error);
+			dev->stats.rx_errors++;
+			if (rx_error & 0x01)
+				dev->stats.rx_over_errors++;
+			if (rx_error & 0x02)
+				dev->stats.rx_length_errors++;
+			if (rx_error & 0x04)
+				dev->stats.rx_frame_errors++;
+			if (rx_error & 0x08)
+				dev->stats.rx_crc_errors++;
+			if (rx_error & 0x10)
+				dev->stats.rx_length_errors++;
+		} else {
+			/* The packet length: up to 4.5K!. */
+			short pkt_len = rx_status & 0x1fff;
+			struct sk_buff *skb;
+
+			skb = dev_alloc_skb(pkt_len + 5 + 2);
+			if (corkscrew_debug > 4)
+				pr_debug("Receiving packet size %d status %4.4x.\n",
+				     pkt_len, rx_status);
+			if (skb != NULL) {
+				skb_reserve(skb, 2);	/* Align IP on 16 byte boundaries */
+				/* 'skb_put()' points to the start of sk_buff data area. */
+				insl(ioaddr + RX_FIFO,
+				     skb_put(skb, pkt_len),
+				     (pkt_len + 3) >> 2);
+				outw(RxDiscard, ioaddr + EL3_CMD);	/* Pop top Rx packet. */
+				skb->protocol = eth_type_trans(skb, dev);
+				netif_rx(skb);
+				dev->stats.rx_packets++;
+				dev->stats.rx_bytes += pkt_len;
+				/* Wait a limited time to go to next packet. */
+				for (i = 200; i >= 0; i--)
+					if (! (inw(ioaddr + EL3_STATUS) & CmdInProgress))
+						break;
+				continue;
+			} else if (corkscrew_debug)
+				pr_debug("%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, pkt_len);
+		}
+		outw(RxDiscard, ioaddr + EL3_CMD);
+		dev->stats.rx_dropped++;
+		/* Wait a limited time to skip this packet. */
+		for (i = 200; i >= 0; i--)
+			if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
+				break;
+	}
+	return 0;
+}
+
+static int boomerang_rx(struct net_device *dev)
+{
+	struct corkscrew_private *vp = netdev_priv(dev);
+	int entry = vp->cur_rx % RX_RING_SIZE;
+	int ioaddr = dev->base_addr;
+	int rx_status;
+
+	if (corkscrew_debug > 5)
+		pr_debug("   In boomerang_rx(), status %4.4x, rx_status %4.4x.\n",
+			inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
+	while ((rx_status = vp->rx_ring[entry].status) & RxDComplete) {
+		if (rx_status & RxDError) {	/* Error, update stats. */
+			unsigned char rx_error = rx_status >> 16;
+			if (corkscrew_debug > 2)
+				pr_debug(" Rx error: status %2.2x.\n",
+				       rx_error);
+			dev->stats.rx_errors++;
+			if (rx_error & 0x01)
+				dev->stats.rx_over_errors++;
+			if (rx_error & 0x02)
+				dev->stats.rx_length_errors++;
+			if (rx_error & 0x04)
+				dev->stats.rx_frame_errors++;
+			if (rx_error & 0x08)
+				dev->stats.rx_crc_errors++;
+			if (rx_error & 0x10)
+				dev->stats.rx_length_errors++;
+		} else {
+			/* The packet length: up to 4.5K!. */
+			short pkt_len = rx_status & 0x1fff;
+			struct sk_buff *skb;
+
+			dev->stats.rx_bytes += pkt_len;
+			if (corkscrew_debug > 4)
+				pr_debug("Receiving packet size %d status %4.4x.\n",
+				     pkt_len, rx_status);
+
+			/* Check if the packet is long enough to just accept without
+			   copying to a properly sized skbuff. */
+			if (pkt_len < rx_copybreak &&
+			    (skb = dev_alloc_skb(pkt_len + 4)) != NULL) {
+				skb_reserve(skb, 2);	/* Align IP on 16 byte boundaries */
+				/* 'skb_put()' points to the start of sk_buff data area. */
+				memcpy(skb_put(skb, pkt_len),
+				       isa_bus_to_virt(vp->rx_ring[entry].
+						   addr), pkt_len);
+				rx_copy++;
+			} else {
+				void *temp;
+				/* Pass up the skbuff already on the Rx ring. */
+				skb = vp->rx_skbuff[entry];
+				vp->rx_skbuff[entry] = NULL;
+				temp = skb_put(skb, pkt_len);
+				/* Remove this checking code for final release. */
+				if (isa_bus_to_virt(vp->rx_ring[entry].addr) != temp)
+					pr_warning("%s: Warning -- the skbuff addresses do not match"
+					     " in boomerang_rx: %p vs. %p / %p.\n",
+					     dev->name,
+					     isa_bus_to_virt(vp->
+							 rx_ring[entry].
+							 addr), skb->head,
+					     temp);
+				rx_nocopy++;
+			}
+			skb->protocol = eth_type_trans(skb, dev);
+			netif_rx(skb);
+			dev->stats.rx_packets++;
+		}
+		entry = (++vp->cur_rx) % RX_RING_SIZE;
+	}
+	/* Refill the Rx ring buffers. */
+	for (; vp->cur_rx - vp->dirty_rx > 0; vp->dirty_rx++) {
+		struct sk_buff *skb;
+		entry = vp->dirty_rx % RX_RING_SIZE;
+		if (vp->rx_skbuff[entry] == NULL) {
+			skb = dev_alloc_skb(PKT_BUF_SZ);
+			if (skb == NULL)
+				break;	/* Bad news!  */
+			skb->dev = dev;	/* Mark as being used by this device. */
+			skb_reserve(skb, 2);	/* Align IP on 16 byte boundaries */
+			vp->rx_ring[entry].addr = isa_virt_to_bus(skb->data);
+			vp->rx_skbuff[entry] = skb;
+		}
+		vp->rx_ring[entry].status = 0;	/* Clear complete bit. */
+	}
+	return 0;
+}
+
+static int corkscrew_close(struct net_device *dev)
+{
+	struct corkscrew_private *vp = netdev_priv(dev);
+	int ioaddr = dev->base_addr;
+	int i;
+
+	netif_stop_queue(dev);
+
+	if (corkscrew_debug > 1) {
+		pr_debug("%s: corkscrew_close() status %4.4x, Tx status %2.2x.\n",
+		     dev->name, inw(ioaddr + EL3_STATUS),
+		     inb(ioaddr + TxStatus));
+		pr_debug("%s: corkscrew close stats: rx_nocopy %d rx_copy %d tx_queued %d.\n",
+			dev->name, rx_nocopy, rx_copy, queued_packet);
+	}
+
+	del_timer(&vp->timer);
+
+	/* Turn off statistics ASAP.  We update lp->stats below. */
+	outw(StatsDisable, ioaddr + EL3_CMD);
+
+	/* Disable the receiver and transmitter. */
+	outw(RxDisable, ioaddr + EL3_CMD);
+	outw(TxDisable, ioaddr + EL3_CMD);
+
+	if (dev->if_port == XCVR_10base2)
+		/* Turn off thinnet power.  Green! */
+		outw(StopCoax, ioaddr + EL3_CMD);
+
+	free_irq(dev->irq, dev);
+
+	outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
+
+	update_stats(ioaddr, dev);
+	if (vp->full_bus_master_rx) {	/* Free Boomerang bus master Rx buffers. */
+		outl(0, ioaddr + UpListPtr);
+		for (i = 0; i < RX_RING_SIZE; i++)
+			if (vp->rx_skbuff[i]) {
+				dev_kfree_skb(vp->rx_skbuff[i]);
+				vp->rx_skbuff[i] = NULL;
+			}
+	}
+	if (vp->full_bus_master_tx) {	/* Free Boomerang bus master Tx buffers. */
+		outl(0, ioaddr + DownListPtr);
+		for (i = 0; i < TX_RING_SIZE; i++)
+			if (vp->tx_skbuff[i]) {
+				dev_kfree_skb(vp->tx_skbuff[i]);
+				vp->tx_skbuff[i] = NULL;
+			}
+	}
+
+	return 0;
+}
+
+static struct net_device_stats *corkscrew_get_stats(struct net_device *dev)
+{
+	struct corkscrew_private *vp = netdev_priv(dev);
+	unsigned long flags;
+
+	if (netif_running(dev)) {
+		spin_lock_irqsave(&vp->lock, flags);
+		update_stats(dev->base_addr, dev);
+		spin_unlock_irqrestore(&vp->lock, flags);
+	}
+	return &dev->stats;
+}
+
+/*  Update statistics.
+	Unlike with the EL3 we need not worry about interrupts changing
+	the window setting from underneath us, but we must still guard
+	against a race condition with a StatsUpdate interrupt updating the
+	table.  This is done by checking that the ASM (!) code generated uses
+	atomic updates with '+='.
+	*/
+static void update_stats(int ioaddr, struct net_device *dev)
+{
+	/* Unlike the 3c5x9 we need not turn off stats updates while reading. */
+	/* Switch to the stats window, and read everything. */
+	EL3WINDOW(6);
+	dev->stats.tx_carrier_errors += inb(ioaddr + 0);
+	dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
+	/* Multiple collisions. */ inb(ioaddr + 2);
+	dev->stats.collisions += inb(ioaddr + 3);
+	dev->stats.tx_window_errors += inb(ioaddr + 4);
+	dev->stats.rx_fifo_errors += inb(ioaddr + 5);
+	dev->stats.tx_packets += inb(ioaddr + 6);
+	dev->stats.tx_packets += (inb(ioaddr + 9) & 0x30) << 4;
+						/* Rx packets   */ inb(ioaddr + 7);
+						/* Must read to clear */
+	/* Tx deferrals */ inb(ioaddr + 8);
+	/* Don't bother with register 9, an extension of registers 6&7.
+	   If we do use the 6&7 values the atomic update assumption above
+	   is invalid. */
+	inw(ioaddr + 10);	/* Total Rx and Tx octets. */
+	inw(ioaddr + 12);
+	/* New: On the Vortex we must also clear the BadSSD counter. */
+	EL3WINDOW(4);
+	inb(ioaddr + 12);
+
+	/* We change back to window 7 (not 1) with the Vortex. */
+	EL3WINDOW(7);
+}
+
+/* This new version of set_rx_mode() supports v1.4 kernels.
+   The Vortex chip has no documented multicast filter, so the only
+   multicast setting is to receive all multicast frames.  At least
+   the chip has a very clean way to set the mode, unlike many others. */
+static void set_rx_mode(struct net_device *dev)
+{
+	int ioaddr = dev->base_addr;
+	short new_mode;
+
+	if (dev->flags & IFF_PROMISC) {
+		if (corkscrew_debug > 3)
+			pr_debug("%s: Setting promiscuous mode.\n",
+			       dev->name);
+		new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm;
+	} else if (!netdev_mc_empty(dev) || dev->flags & IFF_ALLMULTI) {
+		new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast;
+	} else
+		new_mode = SetRxFilter | RxStation | RxBroadcast;
+
+	outw(new_mode, ioaddr + EL3_CMD);
+}
+
+static void netdev_get_drvinfo(struct net_device *dev,
+			       struct ethtool_drvinfo *info)
+{
+	strcpy(info->driver, DRV_NAME);
+	strcpy(info->version, DRV_VERSION);
+	sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
+}
+
+static u32 netdev_get_msglevel(struct net_device *dev)
+{
+	return corkscrew_debug;
+}
+
+static void netdev_set_msglevel(struct net_device *dev, u32 level)
+{
+	corkscrew_debug = level;
+}
+
+static const struct ethtool_ops netdev_ethtool_ops = {
+	.get_drvinfo		= netdev_get_drvinfo,
+	.get_msglevel		= netdev_get_msglevel,
+	.set_msglevel		= netdev_set_msglevel,
+};
+
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	while (!list_empty(&root_corkscrew_dev)) {
+		struct net_device *dev;
+		struct corkscrew_private *vp;
+
+		vp = list_entry(root_corkscrew_dev.next,
+				struct corkscrew_private, list);
+		dev = vp->our_dev;
+		unregister_netdev(dev);
+		cleanup_card(dev);
+		free_netdev(dev);
+	}
+}
+#endif				/* MODULE */