drivers/net: delete intel 486 panther onboard ethernet support

This driver was specific to a "professional workstation" line
of products from around 1993 that used the i82596 ethernet chip
as an on-board ethernet solution.

With a 486 processor, and the premium top of the line model maxing
out at a clock speed of 50MHz, we can safely retire this support.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

drivers/net/ethernet/i825xx/Kconfig

@@ -93,14 +93,6 @@ config LASI_82596
 	  Say Y here to support the builtin Intel 82596 ethernet controller
 	  found in Hewlett-Packard PA-RISC machines with 10Mbit ethernet.
 
-config LP486E
-	tristate "LP486E on board Ethernet"
-	depends on ISA
-	---help---
-	  Say Y here to support the 82596-based on-board Ethernet controller
-	  for the Panther motherboard, which is one of the two shipped in the
-	  Intel Professional Workstation.
-
 config MVME16x_NET
 	tristate "MVME16x Ethernet support"
 	depends on MVME16x

drivers/net/ethernet/i825xx/Makefile

@@ -7,7 +7,6 @@ obj-$(CONFIG_EEXPRESS) += eexpress.o
 obj-$(CONFIG_EEXPRESS_PRO) += eepro.o
 obj-$(CONFIG_ELPLUS) += 3c505.o
 obj-$(CONFIG_EL16) += 3c507.o
-obj-$(CONFIG_LP486E) += lp486e.o
 obj-$(CONFIG_NI52) += ni52.o
 obj-$(CONFIG_SUN3_82586) += sun3_82586.o
 obj-$(CONFIG_ZNET) += znet.o

drivers/net/ethernet/i825xx/lp486e.c

@@ -1,1337 +0,0 @@
-/* Intel Professional Workstation/panther ethernet driver */
-/* lp486e.c: A panther 82596 ethernet driver for linux. */
-/*
-    History and copyrights:
-
-    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
-
-    Apricot
-        Written 1994 by Mark Evans.
-        This driver is for the Apricot 82596 bus-master interface
-
-        Modularised 12/94 Mark Evans
-
-    Professional Workstation
-	Derived from apricot.c by Ard van Breemen
-	<ard@murphy.nl>|<ard@cstmel.hobby.nl>|<ard@cstmel.nl.eu.org>
-
-	Credits:
-	Thanks to Murphy Software BV for letting me write this in their time.
-	Well, actually, I get paid doing this...
-	(Also: see http://www.murphy.nl for murphy, and my homepage ~ard for
-	more information on the Professional Workstation)
-
-    Present version
-	aeb@cwi.nl
-*/
-/*
-    There are currently two motherboards that I know of in the
-    professional workstation. The only one that I know is the
-    intel panther motherboard. -- ard
-*/
-/*
-The pws is equipped with an intel 82596. This is a very intelligent controller
-which runs its own micro-code. Communication with the hostprocessor is done
-through linked lists of commands and buffers in the hostprocessors memory.
-A complete description of the 82596 is available from intel. Search for
-a file called "29021806.pdf". It is a complete description of the chip itself.
-To use it for the pws some additions are needed regarding generation of
-the PORT and CA signal, and the interrupt glue needed for a pc.
-I/O map:
-PORT  SIZE ACTION MEANING
-0xCB0    2 WRITE  Lower 16 bits for PORT command
-0xCB2    2 WRITE  Upper 16 bits for PORT command, and issue of PORT command
-0xCB4    1 WRITE  Generation of CA signal
-0xCB8    1 WRITE  Clear interrupt glue
-All other communication is through memory!
-*/
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/bitops.h>
-
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#define DRV_NAME "lp486e"
-
-/* debug print flags */
-#define LOG_SRCDST    0x80000000
-#define LOG_STATINT   0x40000000
-#define LOG_STARTINT  0x20000000
-
-#define i596_debug debug
-
-static int i596_debug = 0;
-
-static const char * const medianame[] = {
-	"10baseT", "AUI",
-	"10baseT-FD", "AUI-FD",
-};
-
-#define LP486E_TOTAL_SIZE 16
-
-#define I596_NULL (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,
-	CmdIASetup = 1,
-	CmdConfigure = 2,
-	CmdMulticastList = 3,
-	CmdTx = 4,
-	CmdTDR = 5,
-	CmdDump = 6,
-	CmdDiagnose = 7
-};
-
-#if 0
-static const char *CUcmdnames[8] = { "NOP", "IASetup", "Configure", "MulticastList",
-				     "Tx", "TDR", "Dump", "Diagnose" };
-#endif
-
-/* Status word bits */
-#define	STAT_CX		0x8000	/* The CU finished executing a command
-				   with the Interrupt bit set */
-#define	STAT_FR		0x4000	/* The RU finished receiving a frame */
-#define	STAT_CNA	0x2000	/* The CU left the active state */
-#define	STAT_RNR	0x1000	/* The RU left the active state */
-#define STAT_ACK	(STAT_CX | STAT_FR | STAT_CNA | STAT_RNR)
-#define	STAT_CUS	0x0700	/* Status of CU: 0: idle, 1: suspended,
-				   2: active, 3-7: unused */
-#define STAT_RUS	0x00f0	/* Status of RU: 0: idle, 1: suspended,
-				   2: no resources, 4: ready,
-				   10: no resources due to no more RBDs,
-				   12: no more RBDs, other: unused */
-#define	STAT_T		0x0008	/* Bus throttle timers loaded */
-#define	STAT_ZERO	0x0807	/* Always zero */
-
-#if 0
-static char *CUstates[8] = {
-	"idle", "suspended", "active", 0, 0, 0, 0, 0
-};
-static char *RUstates[16] = {
-	"idle", "suspended", "no resources", 0, "ready", 0, 0, 0,
-	0, 0, "no RBDs", 0, "out of RBDs", 0, 0, 0
-};
-
-static void
-i596_out_status(int status) {
-	int bad = 0;
-	char *s;
-
-	printk("status %4.4x:", status);
-	if (status == 0xffff)
-		printk(" strange..\n");
-	else {
-		if (status & STAT_CX)
-			printk("  CU done");
-		if (status & STAT_CNA)
-			printk("  CU stopped");
-		if (status & STAT_FR)
-			printk("  got a frame");
-		if (status & STAT_RNR)
-			printk("  RU stopped");
-		if (status & STAT_T)
-			printk("  throttled");
-		if (status & STAT_ZERO)
-			bad = 1;
-		s = CUstates[(status & STAT_CUS) >> 8];
-		if (!s)
-			bad = 1;
-		else
-			printk("  CU(%s)", s);
-		s = RUstates[(status & STAT_RUS) >> 4];
-		if (!s)
-			bad = 1;
-		else
-			printk("  RU(%s)", s);
-		if (bad)
-			printk("  bad status");
-		printk("\n");
-	}
-}
-#endif
-
-/* Command word bits */
-#define ACK_CX		0x8000
-#define ACK_FR		0x4000
-#define ACK_CNA		0x2000
-#define ACK_RNR		0x1000
-
-#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
-
-typedef u32 phys_addr;
-
-static inline phys_addr
-va_to_pa(void *x) {
-	return x ? virt_to_bus(x) : I596_NULL;
-}
-
-static inline void *
-pa_to_va(phys_addr x) {
-	return (x == I596_NULL) ? NULL : bus_to_virt(x);
-}
-
-/* status bits for cmd */
-#define CMD_STAT_C	0x8000	/* CU command complete */
-#define CMD_STAT_B	0x4000	/* CU command in progress */
-#define CMD_STAT_OK	0x2000	/* CU command completed without errors */
-#define CMD_STAT_A	0x1000	/* CU command abnormally terminated */
-
-struct i596_cmd {		/* 8 bytes */
-	unsigned short status;
-	unsigned short command;
-	phys_addr pa_next;	/* va_to_pa(struct i596_cmd *next) */
-};
-
-#define EOF		0x8000
-#define SIZE_MASK	0x3fff
-
-struct i596_tbd {
-	unsigned short size;
-	unsigned short pad;
-	phys_addr pa_next;	/* va_to_pa(struct i596_tbd *next) */
-	phys_addr pa_data;	/* va_to_pa(char *data) */
-	struct sk_buff *skb;
-};
-
-struct tx_cmd {
-	struct i596_cmd cmd;
-	phys_addr pa_tbd;	/* va_to_pa(struct i596_tbd *tbd) */
-	unsigned short size;
-	unsigned short pad;
-};
-
-/* status bits for rfd */
-#define RFD_STAT_C	0x8000	/* Frame reception complete */
-#define RFD_STAT_B	0x4000	/* Frame reception in progress */
-#define RFD_STAT_OK	0x2000	/* Frame received without errors */
-#define RFD_STATUS	0x1fff
-#define RFD_LENGTH_ERR	0x1000
-#define RFD_CRC_ERR	0x0800
-#define RFD_ALIGN_ERR	0x0400
-#define RFD_NOBUFS_ERR	0x0200
-#define RFD_DMA_ERR	0x0100	/* DMA overrun failure to acquire system bus */
-#define RFD_SHORT_FRAME_ERR	0x0080
-#define RFD_NOEOP_ERR	0x0040
-#define RFD_TRUNC_ERR	0x0020
-#define RFD_MULTICAST  0x0002	/* 0: destination had our address
-				   1: destination was broadcast/multicast */
-#define RFD_COLLISION  0x0001
-
-/* receive frame descriptor */
-struct i596_rfd {
-	unsigned short stat;
-	unsigned short cmd;
-	phys_addr pa_next;	/* va_to_pa(struct i596_rfd *next) */
-	phys_addr pa_rbd;	/* va_to_pa(struct i596_rbd *rbd) */
-	unsigned short count;
-	unsigned short size;
-	char data[1532];
-};
-
-#define RBD_EL		0x8000
-#define RBD_P		0x4000
-#define RBD_SIZEMASK	0x3fff
-#define RBD_EOF		0x8000
-#define RBD_F		0x4000
-
-/* receive buffer descriptor */
-struct i596_rbd {
-	unsigned short size;
-	unsigned short pad;
-	phys_addr pa_next;	/* va_to_pa(struct i596_tbd *next) */
-	phys_addr pa_data;	/* va_to_pa(char *data) */
-	phys_addr pa_prev;	/* va_to_pa(struct i596_tbd *prev) */
-
-	/* Driver private part */
-	struct sk_buff *skb;
-};
-
-#define RX_RING_SIZE 64
-#define RX_SKBSIZE (ETH_FRAME_LEN+10)
-#define RX_RBD_SIZE 32
-
-/* System Control Block - 40 bytes */
-struct i596_scb {
-	u16 status;		/* 0 */
-	u16 command;		/* 2 */
-	phys_addr pa_cmd;	/* 4 - va_to_pa(struct i596_cmd *cmd) */
-	phys_addr pa_rfd;	/* 8 - va_to_pa(struct i596_rfd *rfd) */
-	u32 crc_err;		/* 12 */
-	u32 align_err;		/* 16 */
-	u32 resource_err;	/* 20 */
-	u32 over_err;		/* 24 */
-	u32 rcvdt_err;		/* 28 */
-	u32 short_err;		/* 32 */
-	u16 t_on;		/* 36 */
-	u16 t_off;		/* 38 */
-};
-
-/* Intermediate System Configuration Pointer - 8 bytes */
-struct i596_iscp {
-	u32 busy;		/* 0 */
-	phys_addr pa_scb;	/* 4 - va_to_pa(struct i596_scb *scb) */
-};
-
-/* System Configuration Pointer - 12 bytes */
-struct i596_scp {
-	u32 sysbus;		/* 0 */
-	u32 pad;		/* 4 */
-	phys_addr pa_iscp;	/* 8 - va_to_pa(struct i596_iscp *iscp) */
-};
-
-/* Selftest and dump results - needs 16-byte alignment */
-/*
- * The size of the dump area is 304 bytes. When the dump is executed
- * by the Port command an extra word will be appended to the dump area.
- * The extra word is a copy of the Dump status word (containing the
- * C, B, OK bits). [I find 0xa006, with a0 for C+OK and 6 for dump]
- */
-struct i596_dump {
-	u16 dump[153];		/* (304 = 130h) + 2 bytes */
-};
-
-struct i596_private {		/* aligned to a 16-byte boundary */
-	struct i596_scp scp;	/* 0 - needs 16-byte alignment */
-	struct i596_iscp iscp;	/* 12 */
-	struct i596_scb scb;	/* 20 */
-	u32 dummy;		/* 60 */
-	struct i596_dump dump;	/* 64 - needs 16-byte alignment */
-
-	struct i596_cmd set_add;
-	char eth_addr[8];	/* directly follows set_add */
-
-	struct i596_cmd set_conf;
-	char i596_config[16];	/* directly follows set_conf */
-
-	struct i596_cmd tdr;
-	unsigned long tdr_stat;	/* directly follows tdr */
-
-	int last_restart;
-	struct i596_rbd *rbd_list;
-	struct i596_rbd *rbd_tail;
-	struct i596_rfd *rx_tail;
-	struct i596_cmd *cmd_tail;
-	struct i596_cmd *cmd_head;
-	int cmd_backlog;
-	unsigned long last_cmd;
-	spinlock_t cmd_lock;
-};
-
-static char init_setup[14] = {
-	0x8E,	/* length 14 bytes, prefetch on */
-	0xC8,	/* default: fifo to 8, monitor off */
-	0x40,	/* default: don't save bad frames (apricot.c had 0x80) */
-	0x2E,	/* (default is 0x26)
-		   No source address insertion, 8 byte preamble */
-	0x00,	/* default priority and backoff */
-	0x60,	/* default interframe spacing */
-	0x00,	/* default slot time LSB */
-	0xf2,	/* default slot time and nr of retries */
-	0x00,	/* default various bits
-		   (0: promiscuous mode, 1: broadcast disable,
-		    2: encoding mode, 3: transmit on no CRS,
-		    4: no CRC insertion, 5: CRC type,
-		    6: bit stuffing, 7: padding) */
-	0x00,	/* default carrier sense and collision detect */
-	0x40,	/* default minimum frame length */
-	0xff,	/* (default is 0xff, and that is what apricot.c has;
-		   elp486.c has 0xfb: Enable crc append in memory.) */
-	0x00,	/* default: not full duplex */
-	0x7f	/* (default is 0x3f) 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 print_eth(char *);
-static void set_multicast_list(struct net_device *dev);
-static void i596_tx_timeout(struct net_device *dev);
-
-static int
-i596_timeout(struct net_device *dev, char *msg, int ct) {
-	struct i596_private *lp;
-	int boguscnt = ct;
-
-	lp = netdev_priv(dev);
-	while (lp->scb.command) {
-		if (--boguscnt == 0) {
-			printk("%s: %s timed out - stat %4.4x, cmd %4.4x\n",
-			       dev->name, msg,
-			       lp->scb.status, lp->scb.command);
-			return 1;
-		}
-		udelay(5);
-		barrier();
-	}
-	return 0;
-}
-
-static inline int
-init_rx_bufs(struct net_device *dev, int num) {
-	struct i596_private *lp;
-	struct i596_rfd *rfd;
-	int i;
-	// struct i596_rbd *rbd;
-
-	lp = netdev_priv(dev);
-	lp->scb.pa_rfd = I596_NULL;
-
-	for (i = 0; i < num; i++) {
-		rfd = kmalloc(sizeof(struct i596_rfd), GFP_KERNEL);
-		if (rfd == NULL)
-			break;
-
-		rfd->stat = 0;
-		rfd->pa_rbd = I596_NULL;
-		rfd->count = 0;
-		rfd->size = 1532;
-		if (i == 0) {
-			rfd->cmd = CMD_EOL;
-			lp->rx_tail = rfd;
-		} else {
-			rfd->cmd = 0;
-		}
-		rfd->pa_next = lp->scb.pa_rfd;
-		lp->scb.pa_rfd = va_to_pa(rfd);
-		lp->rx_tail->pa_next = lp->scb.pa_rfd;
-	}
-
-#if 0
-	for (i = 0; i<RX_RBD_SIZE; i++) {
-		rbd = kmalloc(sizeof(struct i596_rbd), GFP_KERNEL);
-		if (rbd) {
-			rbd->pad = 0;
-			rbd->count = 0;
-			rbd->skb = dev_alloc_skb(RX_SKBSIZE);
-			if (!rbd->skb) {
-				printk("dev_alloc_skb failed");
-			}
-			rbd->next = rfd->rbd;
-			if (i) {
-				rfd->rbd->prev = rbd;
-				rbd->size = RX_SKBSIZE;
-			} else {
-				rbd->size = (RX_SKBSIZE | RBD_EL);
-				lp->rbd_tail = rbd;
-			}
-
-			rfd->rbd = rbd;
-		}
-	}
-	lp->rbd_tail->next = rfd->rbd;
-#endif
-	return i;
-}
-
-static inline void
-remove_rx_bufs(struct net_device *dev) {
-	struct i596_private *lp;
-	struct i596_rfd *rfd;
-
-	lp = netdev_priv(dev);
-	lp->rx_tail->pa_next = I596_NULL;
-
-	do {
-		rfd = pa_to_va(lp->scb.pa_rfd);
-		lp->scb.pa_rfd = rfd->pa_next;
-		kfree(rfd);
-	} while (rfd != lp->rx_tail);
-
-	lp->rx_tail = NULL;
-
-#if 0
-	for (lp->rbd_list) {
-	}
-#endif
-}
-
-#define PORT_RESET              0x00    /* reset 82596 */
-#define PORT_SELFTEST           0x01    /* selftest */
-#define PORT_ALTSCP             0x02    /* alternate SCB address */
-#define PORT_DUMP               0x03    /* dump */
-
-#define IOADDR	0xcb0		/* real constant */
-#define IRQ	10		/* default IRQ - can be changed by ECU */
-
-/* The 82596 requires two 16-bit write cycles for a port command */
-static inline void
-PORT(phys_addr a, unsigned int cmd) {
-	if (a & 0xf)
-		printk("lp486e.c: PORT: address not aligned\n");
-	outw(((a & 0xffff) | cmd), IOADDR);
-	outw(((a>>16) & 0xffff), IOADDR+2);
-}
-
-static inline void
-CA(void) {
-	outb(0, IOADDR+4);
-	udelay(8);
-}
-
-static inline void
-CLEAR_INT(void) {
-	outb(0, IOADDR+8);
-}
-
-#if 0
-/* selftest or dump */
-static void
-i596_port_do(struct net_device *dev, int portcmd, char *cmdname) {
-	struct i596_private *lp = netdev_priv(dev);
-	u16 *outp;
-	int i, m;
-
-	memset((void *)&(lp->dump), 0, sizeof(struct i596_dump));
-	outp = &(lp->dump.dump[0]);
-
-	PORT(va_to_pa(outp), portcmd);
-	mdelay(30);             /* random, unmotivated */
-
-	printk("lp486e i82596 %s result:\n", cmdname);
-	for (m = ARRAY_SIZE(lp->dump.dump); m && lp->dump.dump[m-1] == 0; m--)
-		;
-	for (i = 0; i < m; i++) {
-		printk(" %04x", lp->dump.dump[i]);
-		if (i%8 == 7)
-			printk("\n");
-	}
-	printk("\n");
-}
-#endif
-
-static int
-i596_scp_setup(struct net_device *dev) {
-	struct i596_private *lp = netdev_priv(dev);
-	int boguscnt;
-
-	/* Setup SCP, ISCP, SCB */
-	/*
-	 * sysbus bits:
-	 *  only a single byte is significant - here 0x44
-	 *  0x80: big endian mode (details depend on stepping)
-	 *  0x40: 1
-	 *  0x20: interrupt pin is active low
-	 *  0x10: lock function disabled
-	 *  0x08: external triggering of bus throttle timers
-	 *  0x06: 00: 82586 compat mode, 01: segmented mode, 10: linear mode
-	 *  0x01: unused
-	 */
-	lp->scp.sysbus = 0x00440000; 		/* linear mode */
-	lp->scp.pad = 0;			/* must be zero */
-	lp->scp.pa_iscp = va_to_pa(&(lp->iscp));
-
-	/*
-	 * The CPU sets the ISCP to 1 before it gives the first CA()
-	 */
-	lp->iscp.busy = 0x0001;
-	lp->iscp.pa_scb = va_to_pa(&(lp->scb));
-
-	lp->scb.command = 0;
-	lp->scb.status = 0;
-	lp->scb.pa_cmd = I596_NULL;
-	/* lp->scb.pa_rfd has been initialised already */
-
-	lp->last_cmd = jiffies;
-	lp->cmd_backlog = 0;
-	lp->cmd_head = NULL;
-
-	/*
-	 * Reset the 82596.
-	 * We need to wait 10 systemclock cycles, and
-	 * 5 serial clock cycles.
-	 */
-	PORT(0, PORT_RESET);	/* address part ignored */
-	udelay(100);
-
-	/*
-	 * Before the CA signal is asserted, the default SCP address
-	 * (0x00fffff4) can be changed to a 16-byte aligned value
-	 */
-	PORT(va_to_pa(&lp->scp), PORT_ALTSCP);	/* change the scp address */
-
-	/*
-	 * The initialization procedure begins when a
-	 * Channel Attention signal is asserted after a reset.
-	 */
-
-	CA();
-
-	/*
-	 * The ISCP busy is cleared by the 82596 after the SCB address is read.
-	 */
-	boguscnt = 100;
-	while (lp->iscp.busy) {
-		if (--boguscnt == 0) {
-			/* No i82596 present? */
-			printk("%s: i82596 initialization timed out\n",
-			       dev->name);
-			return 1;
-		}
-		udelay(5);
-		barrier();
-	}
-	/* I find here boguscnt==100, so no delay was required. */
-
-	return 0;
-}
-
-static int
-init_i596(struct net_device *dev) {
-	struct i596_private *lp;
-
-	if (i596_scp_setup(dev))
-		return 1;
-
-	lp = netdev_priv(dev);
-	lp->scb.command = 0;
-
-	memcpy ((void *)lp->i596_config, init_setup, 14);
-	lp->set_conf.command = CmdConfigure;
-	i596_add_cmd(dev, (void *)&lp->set_conf);
-
-	memcpy ((void *)lp->eth_addr, dev->dev_addr, 6);
-	lp->set_add.command = CmdIASetup;
-	i596_add_cmd(dev, &lp->set_add);
-
-	lp->tdr.command = CmdTDR;
-	i596_add_cmd(dev, &lp->tdr);
-
-	if (lp->scb.command && i596_timeout(dev, "i82596 init", 200))
-		return 1;
-
-	lp->scb.command = RX_START;
-	CA();
-
-	barrier();
-
-	if (lp->scb.command && i596_timeout(dev, "Receive Unit start", 100))
-		return 1;
-
-	return 0;
-}
-
-/* Receive a single frame */
-static inline int
-i596_rx_one(struct net_device *dev, struct i596_private *lp,
-	    struct i596_rfd *rfd, int *frames) {
-
-	if (rfd->stat & RFD_STAT_OK) {
-		/* a good frame */
-		int pkt_len = (rfd->count & 0x3fff);
-		struct sk_buff *skb = netdev_alloc_skb(dev, pkt_len);
-
-		(*frames)++;
-
-		if (rfd->cmd & CMD_EOL)
-			printk("Received on EOL\n");
-
-		if (skb == NULL) {
-			printk ("%s: i596_rx Memory squeeze, "
-				"dropping packet.\n", dev->name);
-			dev->stats.rx_dropped++;
-			return 1;
-		}
-
-		memcpy(skb_put(skb,pkt_len), rfd->data, pkt_len);
-
-		skb->protocol = eth_type_trans(skb,dev);
-		netif_rx(skb);
-		dev->stats.rx_packets++;
-	} else {
-#if 0
-		printk("Frame reception error status %04x\n",
-		       rfd->stat);
-#endif
-		dev->stats.rx_errors++;
-		if (rfd->stat & RFD_COLLISION)
-			dev->stats.collisions++;
-		if (rfd->stat & RFD_SHORT_FRAME_ERR)
-			dev->stats.rx_length_errors++;
-		if (rfd->stat & RFD_DMA_ERR)
-			dev->stats.rx_over_errors++;
-		if (rfd->stat & RFD_NOBUFS_ERR)
-			dev->stats.rx_fifo_errors++;
-		if (rfd->stat & RFD_ALIGN_ERR)
-			dev->stats.rx_frame_errors++;
-		if (rfd->stat & RFD_CRC_ERR)
-			dev->stats.rx_crc_errors++;
-		if (rfd->stat & RFD_LENGTH_ERR)
-			dev->stats.rx_length_errors++;
-	}
-	rfd->stat = rfd->count = 0;
-	return 0;
-}
-
-static int
-i596_rx(struct net_device *dev) {
-	struct i596_private *lp = netdev_priv(dev);
-	struct i596_rfd *rfd;
-	int frames = 0;
-
-	while (1) {
-		rfd = pa_to_va(lp->scb.pa_rfd);
-		if (!rfd) {
-			printk(KERN_ERR "i596_rx: NULL rfd?\n");
-			return 0;
-		}
-#if 1
-		if (rfd->stat && !(rfd->stat & (RFD_STAT_C | RFD_STAT_B)))
-			printk("SF:%p-%04x\n", rfd, rfd->stat);
-#endif
-		if (!(rfd->stat & RFD_STAT_C))
-			break;		/* next one not ready */
-		if (i596_rx_one(dev, lp, rfd, &frames))
-			break;		/* out of memory */
-		rfd->cmd = CMD_EOL;
-		lp->rx_tail->cmd = 0;
-		lp->rx_tail = rfd;
-		lp->scb.pa_rfd = rfd->pa_next;
-		barrier();
-	}
-
-	return frames;
-}
-
-static void
-i596_cleanup_cmd(struct net_device *dev) {
-	struct i596_private *lp;
-	struct i596_cmd *cmd;
-
-	lp = netdev_priv(dev);
-	while (lp->cmd_head) {
-		cmd = lp->cmd_head;
-
-		lp->cmd_head = pa_to_va(lp->cmd_head->pa_next);
-		lp->cmd_backlog--;
-
-		switch ((cmd->command) & 0x7) {
-			case CmdTx: {
-				struct tx_cmd *tx_cmd = (struct tx_cmd *) cmd;
-				struct i596_tbd * tx_cmd_tbd;
-				tx_cmd_tbd = pa_to_va(tx_cmd->pa_tbd);
-
-				dev_kfree_skb_any(tx_cmd_tbd->skb);
-
-				dev->stats.tx_errors++;
-				dev->stats.tx_aborted_errors++;
-
-				cmd->pa_next = I596_NULL;
-				kfree((unsigned char *)tx_cmd);
-				netif_wake_queue(dev);
-				break;
-			}
-			case CmdMulticastList: {
-				// unsigned short count = *((unsigned short *) (ptr + 1));
-
-				cmd->pa_next = I596_NULL;
-				kfree((unsigned char *)cmd);
-				break;
-			}
-			default: {
-				cmd->pa_next = I596_NULL;
-				break;
-			}
-		}
-		barrier();
-	}
-
-	if (lp->scb.command && i596_timeout(dev, "i596_cleanup_cmd", 100))
-		;
-
-	lp->scb.pa_cmd = va_to_pa(lp->cmd_head);
-}
-
-static void i596_reset(struct net_device *dev, struct i596_private *lp, int ioaddr) {
-
-	if (lp->scb.command && i596_timeout(dev, "i596_reset", 100))
-		;
-
-	netif_stop_queue(dev);
-
-	lp->scb.command = CUC_ABORT | RX_ABORT;
-	CA();
-	barrier();
-
-	/* wait for shutdown */
-	if (lp->scb.command && i596_timeout(dev, "i596_reset(2)", 400))
-		;
-
-	i596_cleanup_cmd(dev);
-	i596_rx(dev);
-
-	netif_start_queue(dev);
-	/*dev_kfree_skb(skb, FREE_WRITE);*/
-	init_i596(dev);
-}
-
-static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) {
-	struct i596_private *lp = netdev_priv(dev);
-	int ioaddr = dev->base_addr;
-	unsigned long flags;
-
-	cmd->status = 0;
-	cmd->command |= (CMD_EOL | CMD_INTR);
-	cmd->pa_next = I596_NULL;
-
-	spin_lock_irqsave(&lp->cmd_lock, flags);
-
-	if (lp->cmd_head) {
-		lp->cmd_tail->pa_next = va_to_pa(cmd);
-	} else {
-		lp->cmd_head = cmd;
-		if (lp->scb.command && i596_timeout(dev, "i596_add_cmd", 100))
-			;
-		lp->scb.pa_cmd = va_to_pa(cmd);
-		lp->scb.command = CUC_START;
-		CA();
-	}
-	lp->cmd_tail = cmd;
-	lp->cmd_backlog++;
-
-	lp->cmd_head = pa_to_va(lp->scb.pa_cmd);
-	spin_unlock_irqrestore(&lp->cmd_lock, flags);
-
-	if (lp->cmd_backlog > 16) {
-		int tickssofar = jiffies - lp->last_cmd;
-		if (tickssofar < HZ/4)
-			return;
-
-		printk(KERN_WARNING "%s: command unit timed out, status resetting.\n", dev->name);
-		i596_reset(dev, lp, ioaddr);
-	}
-}
-
-static int i596_open(struct net_device *dev)
-{
-	int i;
-
-	i = request_irq(dev->irq, i596_interrupt, IRQF_SHARED, dev->name, dev);
-	if (i) {
-		printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
-		return i;
-	}
-
-	if ((i = init_rx_bufs(dev, RX_RING_SIZE)) < RX_RING_SIZE)
-		printk(KERN_ERR "%s: only able to allocate %d receive buffers\n", dev->name, i);
-
-	if (i < 4) {
-		free_irq(dev->irq, dev);
-		return -EAGAIN;
-	}
-	netif_start_queue(dev);
-	init_i596(dev);
-	return 0;			/* Always succeed */
-}
-
-static netdev_tx_t i596_start_xmit (struct sk_buff *skb, struct net_device *dev) {
-	struct tx_cmd *tx_cmd;
-	short length;
-
-	length = skb->len;
-
-	if (length < ETH_ZLEN) {
-		if (skb_padto(skb, ETH_ZLEN))
-			return NETDEV_TX_OK;
-		length = ETH_ZLEN;
-	}
-
-	tx_cmd = kmalloc((sizeof (struct tx_cmd) + sizeof (struct i596_tbd)), GFP_ATOMIC);
-	if (tx_cmd == NULL) {
-		printk(KERN_WARNING "%s: i596_xmit Memory squeeze, dropping packet.\n", dev->name);
-		dev->stats.tx_dropped++;
-		dev_kfree_skb (skb);
-	} else {
-		struct i596_tbd *tx_cmd_tbd;
-		tx_cmd_tbd = (struct i596_tbd *) (tx_cmd + 1);
-		tx_cmd->pa_tbd = va_to_pa (tx_cmd_tbd);
-		tx_cmd_tbd->pa_next = I596_NULL;
-
-		tx_cmd->cmd.command = (CMD_FLEX | CmdTx);
-
-		tx_cmd->pad = 0;
-		tx_cmd->size = 0;
-		tx_cmd_tbd->pad = 0;
-		tx_cmd_tbd->size = (EOF | length);
-
-		tx_cmd_tbd->pa_data = va_to_pa (skb->data);
-		tx_cmd_tbd->skb = skb;
-
-		if (i596_debug & LOG_SRCDST)
-			print_eth (skb->data);
-
-		i596_add_cmd (dev, (struct i596_cmd *) tx_cmd);
-
-		dev->stats.tx_packets++;
-	}
-
-	return NETDEV_TX_OK;
-}
-
-static void
-i596_tx_timeout (struct net_device *dev) {
-	struct i596_private *lp = netdev_priv(dev);
-	int ioaddr = dev->base_addr;
-
-	/* Transmitter timeout, serious problems. */
-	printk(KERN_WARNING "%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) {
-		printk ("Resetting board.\n");
-
-		/* Shutdown and restart */
-		i596_reset (dev, lp, ioaddr);
-	} else {
-		/* Issue a channel attention signal */
-		printk ("Kicking board.\n");
-		lp->scb.command = (CUC_START | RX_START);
-		CA();
-		lp->last_restart = dev->stats.tx_packets;
-	}
-	netif_wake_queue(dev);
-}
-
-static void print_eth(char *add)
-{
-	int i;
-
-	printk ("Dest  ");
-	for (i = 0; i < 6; i++)
-		printk(" %2.2X", (unsigned char) add[i]);
-	printk ("\n");
-
-	printk ("Source");
-	for (i = 0; i < 6; i++)
-		printk(" %2.2X", (unsigned char) add[i+6]);
-	printk ("\n");
-
-	printk ("type %2.2X%2.2X\n",
-		(unsigned char) add[12], (unsigned char) add[13]);
-}
-
-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_rx_mode	= 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,
-};
-
-static int __init lp486e_probe(struct net_device *dev) {
-	struct i596_private *lp;
-	unsigned char eth_addr[6] = { 0, 0xaa, 0, 0, 0, 0 };
-	unsigned char *bios;
-	int i, j;
-	int ret = -ENOMEM;
-	static int probed;
-
-	if (probed)
-		return -ENODEV;
-	probed++;
-
-	if (!request_region(IOADDR, LP486E_TOTAL_SIZE, DRV_NAME)) {
-		printk(KERN_ERR "lp486e: IO address 0x%x in use\n", IOADDR);
-		return -EBUSY;
-	}
-
-	lp = netdev_priv(dev);
-	spin_lock_init(&lp->cmd_lock);
-
-	/*
-	 * Do we really have this thing?
-	 */
-	if (i596_scp_setup(dev)) {
-		ret = -ENODEV;
-		goto err_out_kfree;
-	}
-
-	dev->base_addr = IOADDR;
-	dev->irq = IRQ;
-
-
-	/*
-	 * How do we find the ethernet address? I don't know.
-	 * One possibility is to look at the EISA configuration area
-	 * [0xe8000-0xe9fff]. This contains the ethernet address
-	 * but not at a fixed address - things depend on setup options.
-	 *
-	 * If we find no address, or the wrong address, use
-	 *   ifconfig eth0 hw ether a1:a2:a3:a4:a5:a6
-	 * with the value found in the BIOS setup.
-	 */
-	bios = bus_to_virt(0xe8000);
-	for (j = 0; j < 0x2000; j++) {
-		if (bios[j] == 0 && bios[j+1] == 0xaa && bios[j+2] == 0) {
-			printk("%s: maybe address at BIOS 0x%x:",
-			       dev->name, 0xe8000+j);
-			for (i = 0; i < 6; i++) {
-				eth_addr[i] = bios[i+j];
-				printk(" %2.2X", eth_addr[i]);
-			}
-			printk("\n");
-		}
-	}
-
-	printk("%s: lp486e 82596 at %#3lx, IRQ %d,",
-	       dev->name, dev->base_addr, dev->irq);
-	for (i = 0; i < 6; i++)
-		printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]);
-	printk("\n");
-
-	/* The LP486E-specific entries in the device structure. */
-	dev->netdev_ops = &i596_netdev_ops;
-	dev->watchdog_timeo = 5*HZ;
-
-#if 0
-	/* selftest reports 0x320925ae - don't know what that means */
-	i596_port_do(dev, PORT_SELFTEST, "selftest");
-	i596_port_do(dev, PORT_DUMP, "dump");
-#endif
-	return 0;
-
-err_out_kfree:
-	release_region(IOADDR, LP486E_TOTAL_SIZE);
-	return ret;
-}
-
-static inline void
-i596_handle_CU_completion(struct net_device *dev,
-			  struct i596_private *lp,
-			  unsigned short status,
-			  unsigned short *ack_cmdp) {
-	struct i596_cmd *cmd;
-	int frames_out = 0;
-	int commands_done = 0;
-	int cmd_val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&lp->cmd_lock, flags);
-	cmd = lp->cmd_head;
-
-	while (lp->cmd_head && (lp->cmd_head->status & CMD_STAT_C)) {
-		cmd = lp->cmd_head;
-
-		lp->cmd_head = pa_to_va(lp->cmd_head->pa_next);
-		lp->cmd_backlog--;
-
-		commands_done++;
-		cmd_val = cmd->command & 0x7;
-#if 0
-		printk("finished CU %s command (%d)\n",
-		       CUcmdnames[cmd_val], cmd_val);
-#endif
-		switch (cmd_val) {
-		case CmdTx:
-		{
-			struct tx_cmd *tx_cmd;
-			struct i596_tbd *tx_cmd_tbd;
-
-			tx_cmd = (struct tx_cmd *) cmd;
-			tx_cmd_tbd = pa_to_va(tx_cmd->pa_tbd);
-
-			frames_out++;
-			if (cmd->status & CMD_STAT_OK) {
-				if (i596_debug)
-					print_eth(pa_to_va(tx_cmd_tbd->pa_data));
-			} else {
-				dev->stats.tx_errors++;
-				if (i596_debug)
-					printk("transmission failure:%04x\n",
-					       cmd->status);
-				if (cmd->status & 0x0020)
-					dev->stats.collisions++;
-				if (!(cmd->status & 0x0040))
-					dev->stats.tx_heartbeat_errors++;
-				if (cmd->status & 0x0400)
-					dev->stats.tx_carrier_errors++;
-				if (cmd->status & 0x0800)
-					dev->stats.collisions++;
-				if (cmd->status & 0x1000)
-					dev->stats.tx_aborted_errors++;
-			}
-			dev_kfree_skb_irq(tx_cmd_tbd->skb);
-
-			cmd->pa_next = I596_NULL;
-			kfree((unsigned char *)tx_cmd);
-			netif_wake_queue(dev);
-			break;
-		}
-
-		case CmdMulticastList:
-			cmd->pa_next = I596_NULL;
-			kfree((unsigned char *)cmd);
-			break;
-
-		case CmdTDR:
-		{
-			unsigned long status = *((unsigned long *) (cmd + 1));
-			if (status & 0x8000) {
-				if (i596_debug)
-					printk("%s: link ok.\n", dev->name);
-			} else {
-				if (status & 0x4000)
-					printk("%s: Transceiver problem.\n",
-					       dev->name);
-				if (status & 0x2000)
-					printk("%s: Termination problem.\n",
-					       dev->name);
-				if (status & 0x1000)
-					printk("%s: Short circuit.\n",
-					       dev->name);
-				printk("%s: Time %ld.\n",
-				       dev->name, status & 0x07ff);
-			}
-		}
-		default:
-			cmd->pa_next = I596_NULL;
-			lp->last_cmd = jiffies;
-
-		}
-		barrier();
-	}
-
-	cmd = lp->cmd_head;
-	while (cmd && (cmd != lp->cmd_tail)) {
-		cmd->command &= 0x1fff;
-		cmd = pa_to_va(cmd->pa_next);
-		barrier();
-	}
-
-	if (lp->cmd_head)
-		*ack_cmdp |= CUC_START;
-	lp->scb.pa_cmd = va_to_pa(lp->cmd_head);
-	spin_unlock_irqrestore(&lp->cmd_lock, flags);
-}
-
-static irqreturn_t
-i596_interrupt(int irq, void *dev_instance)
-{
-	struct net_device *dev = dev_instance;
-	struct i596_private *lp = netdev_priv(dev);
-	unsigned short status, ack_cmd = 0;
-	int frames_in = 0;
-
-	/*
-	 * The 82596 examines the command, performs the required action,
-	 * and then clears the SCB command word.
-	 */
-	if (lp->scb.command && i596_timeout(dev, "interrupt", 40))
-		;
-
-	/*
-	 * The status word indicates the status of the 82596.
-	 * It is modified only by the 82596.
-	 *
-	 * [So, we must not clear it. I find often status 0xffff,
-	 *  which is not one of the values allowed by the docs.]
-	 */
-	status = lp->scb.status;
-#if 0
-	if (i596_debug) {
-		printk("%s: i596 interrupt, ", dev->name);
-		i596_out_status(status);
-	}
-#endif
-	/* Impossible, but it happens - perhaps when we get
-	   a receive interrupt but scb.pa_rfd is I596_NULL. */
-	if (status == 0xffff) {
-		printk("%s: i596_interrupt: got status 0xffff\n", dev->name);
-		goto out;
-	}
-
-	ack_cmd = (status & STAT_ACK);
-
-	if (status & (STAT_CX | STAT_CNA))
-		i596_handle_CU_completion(dev, lp, status, &ack_cmd);
-
-	if (status & (STAT_FR | STAT_RNR)) {
-		/* Restart the receive unit when it got inactive somehow */
-		if ((status & STAT_RNR) && netif_running(dev))
-			ack_cmd |= RX_START;
-
-		if (status & STAT_FR) {
-			frames_in = i596_rx(dev);
-			if (!frames_in)
-				printk("receive frame reported, but no frames\n");
-		}
-	}
-
-	/* acknowledge the interrupt */
-	/*
-	if ((lp->scb.pa_cmd != I596_NULL) && netif_running(dev))
-		ack_cmd |= CUC_START;
-	*/
-
-	if (lp->scb.command && i596_timeout(dev, "i596 interrupt", 100))
-		;
-
-	lp->scb.command = ack_cmd;
-
-	CLEAR_INT();
-	CA();
-
- out:
-	return IRQ_HANDLED;
-}
-
-static int i596_close(struct net_device *dev) {
-	struct i596_private *lp = netdev_priv(dev);
-
-	netif_stop_queue(dev);
-
-	if (i596_debug)
-		printk("%s: Shutting down ethercard, status was %4.4x.\n",
-		       dev->name, lp->scb.status);
-
-	lp->scb.command = (CUC_ABORT | RX_ABORT);
-	CA();
-
-	i596_cleanup_cmd(dev);
-
-	if (lp->scb.command && i596_timeout(dev, "i596_close", 200))
-		;
-
-	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 = netdev_priv(dev);
-	struct i596_cmd *cmd;
-
-	if (i596_debug > 1)
-		printk ("%s: set multicast list %d\n",
-			dev->name, netdev_mc_count(dev));
-
-	if (!netdev_mc_empty(dev)) {
-		struct netdev_hw_addr *ha;
-		char *cp;
-		cmd = kmalloc(sizeof(struct i596_cmd) + 2 +
-			      netdev_mc_count(dev) * 6, GFP_ATOMIC);
-		if (cmd == NULL) {
-			printk (KERN_ERR "%s: set_multicast Memory squeeze.\n", dev->name);
-			return;
-		}
-		cmd->command = CmdMulticastList;
-		*((unsigned short *) (cmd + 1)) = netdev_mc_count(dev) * 6;
-		cp = ((char *)(cmd + 1))+2;
-		netdev_for_each_mc_addr(ha, dev) {
-			memcpy(cp, ha->addr, 6);
-			cp += 6;
-		}
-		if (i596_debug & LOG_SRCDST)
-			print_eth (((char *)(cmd + 1)) + 2);
-		i596_add_cmd(dev, cmd);
-	} else {
-		if (lp->set_conf.pa_next != I596_NULL) {
-			return;
-		}
-		if (netdev_mc_empty(dev) &&
-		    !(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) {
-			lp->i596_config[8] &= ~0x01;
-		} else {
-			lp->i596_config[8] |= 0x01;
-		}
-
-		i596_add_cmd(dev, &lp->set_conf);
-	}
-}
-
-MODULE_AUTHOR("Ard van Breemen <ard@cstmel.nl.eu.org>");
-MODULE_DESCRIPTION("Intel Panther onboard i82596 driver");
-MODULE_LICENSE("GPL");
-
-static struct net_device *dev_lp486e;
-static int full_duplex;
-static int options;
-static int io = IOADDR;
-static int irq = IRQ;
-
-module_param(debug, int, 0);
-//module_param(max_interrupt_work, int, 0);
-//module_param(reverse_probe, int, 0);
-//module_param(rx_copybreak, int, 0);
-module_param(options, int, 0);
-module_param(full_duplex, int, 0);
-
-static int __init lp486e_init_module(void) {
-	int err;
-	struct net_device *dev = alloc_etherdev(sizeof(struct i596_private));
-	if (!dev)
-		return -ENOMEM;
-
-	dev->irq = irq;
-	dev->base_addr = io;
-	err = lp486e_probe(dev);
-	if (err) {
-		free_netdev(dev);
-		return err;
-	}
-	err = register_netdev(dev);
-	if (err) {
-		release_region(dev->base_addr, LP486E_TOTAL_SIZE);
-		free_netdev(dev);
-		return err;
-	}
-	dev_lp486e = dev;
-	full_duplex = 0;
-	options = 0;
-	return 0;
-}
-
-static void __exit lp486e_cleanup_module(void) {
-	unregister_netdev(dev_lp486e);
-	release_region(dev_lp486e->base_addr, LP486E_TOTAL_SIZE);
-	free_netdev(dev_lp486e);
-}
-
-module_init(lp486e_init_module);
-module_exit(lp486e_cleanup_module);