Initial source

1 files changed, 1518 insertions, 0 deletions

diff --git a/i386/i386at/gpl/linux/net/3c505.c b/i386/i386at/gpl/linux/net/3c505.c
new file mode 100644
index 0000000..63ccc9c
--- /dev/null
+++ b/i386/i386at/gpl/linux/net/3c505.c
@@ -0,0 +1,1518 @@
+/*
+ * Linux ethernet device driver for the 3Com Etherlink Plus (3C505)
+ * 	By Craig Southeren and Juha Laiho
+ *
+ * 3c505.c	This module implements an interface to the 3Com
+ *		Etherlink Plus (3c505) ethernet card. Linux device 
+ *		driver interface reverse engineered from the Linux 3C509
+ *		device drivers. Some 3C505 information gleaned from
+ *		the Crynwr packet driver. Still this driver would not
+ *		be here without 3C505 technical reference provided by
+ *		3Com.
+ *
+ * Version:	@(#)3c505.c	0.8.4	17-Dec-95
+ *
+ * Authors:	Linux 3c505 device driver by
+ *			Craig Southeren, <craigs@ineluki.apana.org.au>
+ *              Final debugging by
+ *			Andrew Tridgell, <tridge@nimbus.anu.edu.au>
+ *		Auto irq/address, tuning, cleanup and v1.1.4+ kernel mods by
+ *			Juha Laiho, <jlaiho@ichaos.nullnet.fi>
+ *              Linux 3C509 driver by
+ *             		Donald Becker, <becker@super.org>
+ *		Crynwr packet driver by
+ *			Krishnan Gopalan and Gregg Stefancik,
+ * 			   Clemson University Engineering Computer Operations.
+ *			Portions of the code have been adapted from the 3c505
+ *			   driver for NCSA Telnet by Bruce Orchard and later
+ *			   modified by Warren Van Houten and krus@diku.dk.
+ *              3C505 technical information provided by
+ *                      Terry Murphy, of 3Com Network Adapter Division
+ *		Linux 1.3.0 changes by
+ *			Alan Cox <Alan.Cox@linux.org>
+ *                     
+ */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/in.h>
+#include <linux/malloc.h>
+#include <linux/ioport.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+
+#include "3c505.h"
+
+/*********************************************************
+ *
+ *  define debug messages here as common strings to reduce space
+ *
+ *********************************************************/
+
+static const char * filename = __FILE__;
+
+static const char * null_msg = "*** NULL at %s:%s (line %d) ***\n";
+#define CHECK_NULL(p) \
+	if (!p) printk(null_msg, filename,__FUNCTION__,__LINE__)
+
+static const char * timeout_msg = "*** timeout at %s:%s (line %d) ***\n";
+#define TIMEOUT_MSG(lineno) \
+	printk(timeout_msg, filename,__FUNCTION__,(lineno))
+
+static const char * invalid_pcb_msg =
+	"*** invalid pcb length %d at %s:%s (line %d) ***\n";
+#define INVALID_PCB_MSG(len) \
+	printk(invalid_pcb_msg, (len),filename,__FUNCTION__,__LINE__)
+
+static const char * search_msg = "%s: Looking for 3c505 adapter at address %#x...";
+
+static const char * stilllooking_msg = "still looking...";
+
+static const char * found_msg = "found.\n";
+
+static const char * notfound_msg = "not found (reason = %d)\n";
+
+static const char * couldnot_msg = "%s: 3c505 not found\n";
+
+/*********************************************************
+ *
+ *  various other debug stuff
+ *
+ *********************************************************/
+
+#ifdef ELP_DEBUG
+static int elp_debug = ELP_DEBUG;
+#else
+static int elp_debug = 0;
+#endif
+
+/*
+ *  0 = no messages (well, some)
+ *  1 = messages when high level commands performed
+ *  2 = messages when low level commands performed
+ *  3 = messages when interrupts received
+ */
+
+#define	ELP_VERSION	"0.8.4"
+
+#ifdef MACH
+#define ELP_NEED_HARD_RESET 0
+#endif
+
+/*****************************************************************
+ *
+ * useful macros
+ *
+ *****************************************************************/
+
+#ifndef	TRUE
+#define	TRUE	1
+#endif
+
+#ifndef	FALSE
+#define	FALSE	0
+#endif
+
+
+/*****************************************************************
+ *
+ * List of I/O-addresses we try to auto-sense
+ * Last element MUST BE 0!
+ *****************************************************************/
+
+const int addr_list[]={0x300,0x280,0x310,0}; 
+
+/*****************************************************************
+ *
+ * Functions for I/O (note the inline !)
+ *
+ *****************************************************************/
+
+static inline unsigned char
+inb_status (unsigned int base_addr)
+{
+	return inb(base_addr+PORT_STATUS);
+}
+
+static inline unsigned char
+inb_control (unsigned int base_addr)
+{
+	return inb(base_addr+PORT_CONTROL);
+}
+
+static inline int
+inb_command (unsigned int base_addr)
+{
+	return inb(base_addr+PORT_COMMAND);
+}
+
+static inline void
+outb_control (unsigned char val, unsigned int base_addr)
+{
+	outb(val, base_addr+PORT_CONTROL);
+}
+
+static inline void
+outb_command (unsigned char val, unsigned int base_addr)
+{
+	outb(val, base_addr+PORT_COMMAND);
+}
+
+static inline unsigned int
+inw_data (unsigned int base_addr)
+{
+	return inw(base_addr+PORT_DATA);
+}
+
+static inline void
+outw_data (unsigned int val, unsigned int base_addr)
+{
+	outw(val, base_addr+PORT_DATA);
+}
+
+
+/*****************************************************************
+ *
+ *  structure to hold context information for adapter
+ *
+ *****************************************************************/
+
+typedef struct {
+	volatile short got[NUM_TRANSMIT_CMDS];	/* flags for command completion */
+	pcb_struct tx_pcb;	/* PCB for foreground sending */
+	pcb_struct rx_pcb;	/* PCB for foreground receiving */
+	pcb_struct itx_pcb;	/* PCB for background sending */
+	pcb_struct irx_pcb;	/* PCB for background receiving */
+	struct enet_statistics stats;
+} elp_device;
+
+static int reset_count=0;
+
+/*****************************************************************
+ *
+ *  useful functions for accessing the adapter
+ *
+ *****************************************************************/
+
+/*
+ * use this routine when accessing the ASF bits as they are
+ * changed asynchronously by the adapter
+ */
+
+/* get adapter PCB status */
+#define	GET_ASF(addr) \
+	(get_status(addr)&ASF_PCB_MASK)
+
+static inline int
+get_status (unsigned int base_addr)
+{
+	int timeout = jiffies + 10;
+	register int stat1;
+	do {
+		stat1 = inb_status(base_addr);
+	} while (stat1 != inb_status(base_addr) && jiffies < timeout);
+	if (jiffies >= timeout)
+		TIMEOUT_MSG(__LINE__);
+	return stat1;
+}
+
+static inline void
+set_hsf (unsigned int base_addr, int hsf)
+{
+	cli();
+	outb_control((inb_control(base_addr)&~HSF_PCB_MASK)|hsf, base_addr);
+	sti(); 
+}
+
+#define WAIT_HCRE(addr,toval) wait_hcre((addr),(toval),__LINE__)
+static inline int
+wait_hcre (unsigned int base_addr, int toval, int lineno)
+{
+	int timeout = jiffies + toval;
+	while (((inb_status(base_addr)&HCRE)==0) && (jiffies <= timeout))
+		;
+	if (jiffies >= timeout) {
+		TIMEOUT_MSG(lineno);
+		return FALSE;
+	}
+	return TRUE;
+}
+
+static inline int
+wait_fast_hcre (unsigned int base_addr, int toval, int lineno)
+{
+	int timeout = 0;
+	while (((inb_status(base_addr)&HCRE)==0) && (timeout++ < toval))
+		;
+	if (timeout >= toval) {
+		sti();
+		TIMEOUT_MSG(lineno);
+		return FALSE;
+	}
+	return TRUE;
+}
+
+static int start_receive (struct device *, pcb_struct *);
+static void adapter_hard_reset (struct device *);
+
+inline static void
+adapter_reset (struct device * dev)
+{
+	int timeout;
+	unsigned char orig_hcr=inb_control(dev->base_addr);
+
+	elp_device * adapter=dev->priv;
+
+	outb_control(0,dev->base_addr);
+
+	if (inb_status(dev->base_addr)&ACRF) {
+		do {
+			inb_command(dev->base_addr);
+			timeout=jiffies+2;
+			while ((jiffies<=timeout) && !(inb_status(dev->base_addr)&ACRF))
+				;
+		} while (inb_status(dev->base_addr)&ACRF);
+		set_hsf(dev->base_addr,HSF_PCB_NAK);
+	}
+
+	outb_control(inb_control(dev->base_addr)|ATTN|DIR,dev->base_addr);
+	timeout=jiffies+1;
+	while (jiffies<=timeout)
+		;
+	outb_control(inb_control(dev->base_addr)&~ATTN,dev->base_addr);
+	timeout=jiffies+1;
+	while (jiffies<=timeout)
+		;
+	outb_control(inb_control(dev->base_addr)|FLSH,dev->base_addr);
+	timeout=jiffies+1;
+	while (jiffies<=timeout)
+		;
+	outb_control(inb_control(dev->base_addr)&~FLSH,dev->base_addr);
+	timeout=jiffies+1;
+	while (jiffies<=timeout)
+		;
+
+	outb_control(orig_hcr, dev->base_addr);
+	if (!start_receive(dev, &adapter->tx_pcb))
+		printk("%s: start receive command failed \n", dev->name);
+}
+
+/*****************************************************************
+ *
+ * send_pcb
+ *   Send a PCB to the adapter. 
+ *
+ *	output byte to command reg  --<--+
+ *	wait until HCRE is non zero      |
+ *	loop until all bytes sent   -->--+
+ *	set HSF1 and HSF2 to 1
+ *	output pcb length
+ *	wait until ASF give ACK or NAK
+ *	set HSF1 and HSF2 to 0
+ *
+ *****************************************************************/
+
+static int
+send_pcb (struct device * dev, pcb_struct * pcb)
+{
+	int i;
+	int timeout;
+	int cont;
+
+	/*
+	 * load each byte into the command register and
+	 * wait for the HCRE bit to indicate the adapter
+	 * had read the byte
+	 */
+	set_hsf(dev->base_addr,0); 
+	if ((cont = WAIT_HCRE(dev->base_addr,5))) {
+		cli();
+		if (pcb->command==CMD_TRANSMIT_PACKET)
+			outb_control(inb_control(dev->base_addr)&~DIR,dev->base_addr);
+		outb_command(pcb->command, dev->base_addr);
+		sti();
+		cont = WAIT_HCRE(dev->base_addr,5);
+	}
+
+	if (cont) {
+		outb_command(pcb->length, dev->base_addr);
+		cont = WAIT_HCRE(dev->base_addr,5);
+	}
+
+	cli();
+	for (i = 0; cont && (i < pcb->length); i++) {
+		outb_command(pcb->data.raw[i], dev->base_addr);
+		cont = wait_fast_hcre(dev->base_addr,20000,__LINE__);
+	} /* if wait_fast_hcre() failed, has already done sti() */
+
+	/* set the host status bits to indicate end of PCB */
+	/* send the total packet length as well */
+	/* wait for the adapter to indicate that it has read the PCB */
+	if (cont) {
+		set_hsf(dev->base_addr,HSF_PCB_END);
+		outb_command(2+pcb->length, dev->base_addr);
+		sti();
+		timeout = jiffies + 7;
+		while (jiffies < timeout) {
+			i = GET_ASF(dev->base_addr);
+			if ((i == ASF_PCB_ACK) || (i == ASF_PCB_NAK))
+				break;
+		}
+
+		if (i == ASF_PCB_ACK) {
+			reset_count=0;
+			return TRUE;
+		}
+		else if (i == ASF_PCB_NAK) {
+			printk("%s: PCB send was NAKed\n", dev->name);
+		} else {
+			printk("%s: timeout after sending PCB\n", dev->name);
+		}
+	} else {
+		sti();
+		printk("%s: timeout in middle of sending PCB\n", dev->name);
+	}
+
+	adapter_reset(dev);
+	return FALSE;
+}
+
+/*****************************************************************
+ *
+ * receive_pcb
+ *   Read a PCB to the adapter
+ *
+ *	wait for ACRF to be non-zero        ---<---+
+ *	input a byte                               |
+ *	if ASF1 and ASF2 were not both one         |
+ *		before byte was read, loop      --->---+
+ *	set HSF1 and HSF2 for ack
+ *
+ *****************************************************************/
+
+static int
+receive_pcb (struct device * dev, pcb_struct * pcb)
+{
+	int i, j;
+	int total_length;
+	int stat;
+	int timeout;
+
+	CHECK_NULL(pcb);
+	CHECK_NULL(dev);
+
+	set_hsf(dev->base_addr,0);
+
+	/* get the command code */
+	timeout = jiffies + 2;
+	while (((stat = get_status(dev->base_addr))&ACRF) == 0 && jiffies < timeout)
+		;
+	if (jiffies >= timeout) {
+		TIMEOUT_MSG(__LINE__);
+		return FALSE;
+	}
+
+	pcb->command = inb_command(dev->base_addr);
+
+	/* read the data length */
+	timeout = jiffies + 3;
+	while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && jiffies < timeout)
+		;
+	if (jiffies >= timeout) {
+		TIMEOUT_MSG(__LINE__);
+		return FALSE;
+	}
+	pcb->length = inb_command(dev->base_addr);
+
+	if (pcb->length > MAX_PCB_DATA) {
+		INVALID_PCB_MSG(pcb->length);
+		adapter_reset(dev);
+		return FALSE;
+	}
+
+	/* read the data */
+	cli();
+	i = 0;
+	do {
+		j = 0;
+		while (((stat = get_status(dev->base_addr))&ACRF) == 0 && j++ < 20000)
+			;
+		pcb->data.raw[i++] = inb_command(dev->base_addr);
+		if (i > MAX_PCB_DATA)
+			INVALID_PCB_MSG(i);
+	} while ((stat & ASF_PCB_MASK) != ASF_PCB_END && j < 20000);
+	sti();
+	if (j >= 20000) {
+		TIMEOUT_MSG(__LINE__);
+		return FALSE;
+	}
+
+	/* woops, the last "data" byte was really the length! */
+	total_length = pcb->data.raw[--i];
+
+	/* safety check total length vs data length */
+	if (total_length != (pcb->length + 2)) {
+		if (elp_debug >= 2)
+			printk("%s: mangled PCB received\n", dev->name);
+		set_hsf(dev->base_addr,HSF_PCB_NAK);
+		return FALSE;
+	}
+
+	set_hsf(dev->base_addr,HSF_PCB_ACK);
+	reset_count=0;
+	return TRUE;
+}
+
+static void
+adapter_hard_reset (struct device * dev)
+{
+	int timeout;
+	long flags;
+
+	CHECK_NULL(dev);
+
+	save_flags(flags);
+	sti();
+
+	if (elp_debug > 0)
+		printk("%s: Resetting the adapter, please wait (approx 20 s)\n",
+			dev->name);
+	/*
+	 * take FLSH and ATTN high
+	 */
+	outb_control(ATTN|FLSH, dev->base_addr);
+
+	/*
+	 * wait for a little bit
+	 */
+	for (timeout = jiffies + 20; jiffies <= timeout; )
+		;
+
+	/*
+	 * now take them low
+	 */
+	outb_control(0, dev->base_addr);
+
+	/*
+	 * wait for a little bit
+	 */
+	for (timeout = jiffies + 20; jiffies <= timeout; )
+		;
+
+	/*
+	 * now hang around until the board gets it's act together
+	 */
+	for (timeout = jiffies + (100 * 15); jiffies <= timeout; ) 
+		if (GET_ASF(dev->base_addr) != ASF_PCB_END)
+			break;
+	restore_flags(flags);
+}
+
+/******************************************************
+ *
+ *  queue a receive command on the adapter so we will get an
+ *  interrupt when a packet is received.
+ *
+ ******************************************************/
+
+static int
+start_receive (struct device * dev, pcb_struct * tx_pcb)
+{
+	CHECK_NULL(dev);
+	CHECK_NULL(tx_pcb);
+
+	if (elp_debug >= 3)
+		printk("%s: restarting receiver\n", dev->name);
+	tx_pcb->command = CMD_RECEIVE_PACKET;
+	tx_pcb->length = sizeof(struct Rcv_pkt);
+	tx_pcb->data.rcv_pkt.buf_seg
+		= tx_pcb->data.rcv_pkt.buf_ofs = 0; /* Unused */
+	tx_pcb->data.rcv_pkt.buf_len = 1600;
+	tx_pcb->data.rcv_pkt.timeout = 0;	/* set timeout to zero */
+	return send_pcb(dev, tx_pcb); 
+}
+
+/******************************************************
+ *
+ * extract a packet from the adapter
+ * this routine is only called from within the interrupt
+ * service routine, so no cli/sti calls are needed
+ * note that the length is always assumed to be even
+ *
+ ******************************************************/
+
+static void
+receive_packet (struct device * dev, int len)
+{
+	register int i;
+	unsigned short * ptr;
+	int timeout;
+	int rlen;
+	struct sk_buff *skb;
+	elp_device * adapter;
+
+	CHECK_NULL(dev);
+	adapter=dev->priv;
+
+	if (len <= 0 || ((len & ~1) != len))
+		if (elp_debug >= 3) {
+			sti();
+			printk("*** bad packet len %d at %s(%d)\n",len,filename,__LINE__);
+			cli();
+		}
+
+	rlen = (len+1) & ~1;
+
+	skb = dev_alloc_skb(rlen+2);
+
+	/*
+	 * make sure the data register is going the right way
+	 */
+
+	outb_control(inb_control(dev->base_addr)|DIR, dev->base_addr);
+
+	/*
+	 * if buffer could not be allocated, swallow it
+	 */
+	if (skb == NULL) {
+		for (i = 0; i < (rlen/2); i++) {
+			timeout = 0;
+			while ((inb_status(dev->base_addr)&HRDY) == 0 && timeout++ < 20000)
+				;
+			if (timeout >= 20000) {
+				sti();
+				TIMEOUT_MSG(__LINE__);
+				break;
+			}
+
+			inw_data(dev->base_addr);
+		}
+		adapter->stats.rx_dropped++;
+
+	} else {
+		skb_reserve(skb,2);	/* 16 byte alignment */
+		skb->dev = dev;
+
+		/*
+		 * now read the data from the adapter
+		 */
+		ptr = (unsigned short *)skb_put(skb,len);
+		for (i = 0; i < (rlen/2); i++) { 
+			timeout = 0;
+			while ((inb_status(dev->base_addr)&HRDY) == 0 && timeout++ < 20000) 
+				;
+			if (timeout >= 20000) {
+				sti();
+				printk("*** timeout at %s(%d) reading word %d of %d ***\n",
+					filename,__LINE__, i, rlen/2);	
+				kfree_skb(skb, FREE_WRITE);
+				return;
+			}
+
+			*ptr = inw_data(dev->base_addr); 
+			ptr++; 
+		}
+
+		sti();
+		skb->protocol=eth_type_trans(skb,dev);
+		netif_rx(skb);
+	}
+
+	outb_control(inb_control(dev->base_addr)&~DIR, dev->base_addr);
+}
+
+
+/******************************************************
+ *
+ * interrupt handler
+ *
+ ******************************************************/
+
+static void
+elp_interrupt (int irq, struct pt_regs *reg_ptr)
+{
+	int len;
+	int dlen;
+	struct device *dev;
+	elp_device * adapter;
+	int timeout;
+
+	if (irq < 0 || irq > 15) {
+		printk ("elp_interrupt(): illegal IRQ number found in interrupt routine (%i)\n", irq);
+		return;
+	}
+
+	dev = irq2dev_map[irq];
+
+	if (dev == NULL) {
+		printk ("elp_interrupt(): irq %d for unknown device.\n", irq);
+		return;
+	}
+
+	adapter = (elp_device *) dev->priv;
+
+	CHECK_NULL(adapter);
+
+	if (dev->interrupt)
+		if (elp_debug >= 2)
+			printk("%s: Re-entering the interrupt handler.\n", dev->name);
+	dev->interrupt = 1;
+
+	/*
+	 * allow interrupts (we need timers!)
+	 */
+	sti();
+
+	/*
+	 * receive a PCB from the adapter
+	 */
+	timeout = jiffies + 3;
+	while ((inb_status(dev->base_addr)&ACRF) != 0 && jiffies < timeout) {
+
+		if (receive_pcb(dev, &adapter->irx_pcb)) {
+
+			switch (adapter->irx_pcb.command) {
+
+				/*
+				 * received a packet - this must be handled fast
+				 */
+				case CMD_RECEIVE_PACKET_COMPLETE:
+					/* if the device isn't open, don't pass packets up the stack */
+					if (dev->start == 0)
+						break;
+					cli();
+					/* Set direction of adapter FIFO */
+					outb_control(inb_control(dev->base_addr)|DIR,
+					             dev->base_addr);
+					len = adapter->irx_pcb.data.rcv_resp.pkt_len;
+					dlen = adapter->irx_pcb.data.rcv_resp.buf_len;
+					if (adapter->irx_pcb.data.rcv_resp.timeout != 0) {
+						printk("%s: interrupt - packet not received correctly\n", dev->name);
+						sti();
+					} else {
+						if (elp_debug >= 3) {
+							sti();
+							printk("%s: interrupt - packet received of length %i (%i)\n", dev->name, len, dlen);
+							cli();
+						}
+						receive_packet(dev, dlen);
+						sti();
+						if (elp_debug >= 3)
+							printk("%s: packet received\n", dev->name);
+					}
+					if (dev->start && !start_receive(dev, &adapter->itx_pcb)) 
+						if (elp_debug >= 2)
+							printk("%s: interrupt - failed to send receive start PCB\n", dev->name);
+					if (elp_debug >= 3)
+					printk("%s: receive procedure complete\n", dev->name);
+
+					break;
+
+				/*
+				 * 82586 configured correctly
+				 */
+				case CMD_CONFIGURE_82586_RESPONSE:
+					adapter->got[CMD_CONFIGURE_82586] = 1;
+					if (elp_debug >= 3)
+						printk("%s: interrupt - configure response received\n", dev->name);
+					break;
+
+				/*
+				 * Adapter memory configuration
+				 */
+				case CMD_CONFIGURE_ADAPTER_RESPONSE:
+					adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 1;
+					if (elp_debug >= 3)
+						printk("%s: Adapter memory configuration %s.\n",dev->name,
+							adapter->irx_pcb.data.failed?"failed":"succeeded");
+					break;
+
+				/*
+				 * Multicast list loading
+				 */
+				case CMD_LOAD_MULTICAST_RESPONSE:
+					adapter->got[CMD_LOAD_MULTICAST_LIST] = 1;
+					if (elp_debug >= 3)
+						printk("%s: Multicast address list loading %s.\n",dev->name,
+							adapter->irx_pcb.data.failed?"failed":"succeeded");
+					break;
+
+				/*
+				 * Station address setting
+				 */
+				case CMD_SET_ADDRESS_RESPONSE:
+					adapter->got[CMD_SET_STATION_ADDRESS] = 1;
+					if (elp_debug >= 3)
+						printk("%s: Ethernet address setting %s.\n",dev->name,
+							adapter->irx_pcb.data.failed?"failed":"succeeded");
+					break;
+
+
+				/*
+				 * received board statistics
+				 */
+				case CMD_NETWORK_STATISTICS_RESPONSE:
+					adapter->stats.rx_packets += adapter->irx_pcb.data.netstat.tot_recv;
+					adapter->stats.tx_packets += adapter->irx_pcb.data.netstat.tot_xmit;
+					adapter->stats.rx_crc_errors += adapter->irx_pcb.data.netstat.err_CRC;
+					adapter->stats.rx_frame_errors += adapter->irx_pcb.data.netstat.err_align;
+					adapter->stats.rx_fifo_errors += adapter->irx_pcb.data.netstat.err_ovrrun;
+					adapter->got[CMD_NETWORK_STATISTICS] = 1;
+					if (elp_debug >= 3)
+						printk("%s: interrupt - statistics response received\n", dev->name);
+					break;
+
+				/*
+				 * sent a packet
+				 */
+				case CMD_TRANSMIT_PACKET_COMPLETE:
+					if (elp_debug >= 3) 
+					printk("%s: interrupt - packet sent\n", dev->name);
+					if (dev->start == 0)
+						break;
+					if (adapter->irx_pcb.data.xmit_resp.c_stat != 0)
+						if (elp_debug >= 2)
+							printk("%s: interrupt - error sending packet %4.4x\n",
+								dev->name, adapter->irx_pcb.data.xmit_resp.c_stat);
+					dev->tbusy = 0;
+					mark_bh(NET_BH);
+					break;
+
+				/*
+				 * some unknown PCB
+				 */
+				default:
+					printk("%s: unknown PCB received - %2.2x\n", dev->name, adapter->irx_pcb.command);
+					break;
+			}
+		} else {
+			printk("%s: failed to read PCB on interrupt\n", dev->name);
+			adapter_reset(dev);
+		}
+	}
+
+	/*
+	 * indicate no longer in interrupt routine
+	 */
+	dev->interrupt = 0;
+}
+
+
+/******************************************************
+ *
+ * open the board
+ *
+ ******************************************************/
+
+static int
+elp_open (struct device *dev)
+{
+	elp_device * adapter;
+
+	CHECK_NULL(dev);
+
+	adapter = dev->priv;
+
+	if (elp_debug >= 3)  
+		printk("%s: request to open device\n", dev->name);
+
+	/*
+	 * make sure we actually found the device
+	 */
+	if (adapter == NULL) {
+		printk("%s: Opening a non-existent physical device\n", dev->name);
+		return -EAGAIN;
+	}
+
+	/*
+	 * disable interrupts on the board
+	 */
+	outb_control(0x00, dev->base_addr);
+
+	/*
+	 * clear any pending interrupts
+	 */
+	inb_command(dev->base_addr);
+	adapter_reset(dev);
+
+	/*
+	 * interrupt routine not entered
+	 */
+	dev->interrupt = 0;
+
+	/*
+	 *  transmitter not busy 
+	 */
+	dev->tbusy = 0;
+
+	/*
+	 * make sure we can find the device header given the interrupt number
+	 */
+	irq2dev_map[dev->irq] = dev;
+
+	/*
+	 * install our interrupt service routine
+	 */
+	if (request_irq(dev->irq, &elp_interrupt, 0, "3c505")) {
+		irq2dev_map[dev->irq] = NULL;
+		return -EAGAIN;
+	}
+
+	/*
+	 * enable interrupts on the board
+	 */
+	outb_control(CMDE, dev->base_addr);
+
+	/*
+	 * device is now officially open!
+	 */
+	dev->start = 1;
+
+	/*
+	 * configure adapter memory: we need 10 multicast addresses, default==0
+	 */
+	if (elp_debug >= 3)
+		printk("%s: sending 3c505 memory configuration command\n", dev->name);
+	adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
+	adapter->tx_pcb.data.memconf.cmd_q = 10;
+	adapter->tx_pcb.data.memconf.rcv_q = 20;
+	adapter->tx_pcb.data.memconf.mcast = 10;
+	adapter->tx_pcb.data.memconf.frame = 20;
+	adapter->tx_pcb.data.memconf.rcv_b = 20;
+	adapter->tx_pcb.data.memconf.progs = 0;
+	adapter->tx_pcb.length = sizeof(struct Memconf);
+	adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 0;
+	if (!send_pcb(dev, &adapter->tx_pcb))
+		printk("%s: couldn't send memory configuration command\n", dev->name);
+	else {
+		int timeout = jiffies + TIMEOUT;
+		while (adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] == 0 && jiffies < timeout)
+			;
+		if (jiffies >= timeout)
+			TIMEOUT_MSG(__LINE__);
+	}
+
+
+	/*
+	 * configure adapter to receive broadcast messages and wait for response
+	 */
+	if (elp_debug >= 3)
+		printk("%s: sending 82586 configure command\n", dev->name);
+	adapter->tx_pcb.command = CMD_CONFIGURE_82586;
+	adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
+	adapter->tx_pcb.length  = 2;
+	adapter->got[CMD_CONFIGURE_82586] = 0;
+	if (!send_pcb(dev, &adapter->tx_pcb))
+		printk("%s: couldn't send 82586 configure command\n", dev->name);
+	else {
+		int timeout = jiffies + TIMEOUT;
+		while (adapter->got[CMD_CONFIGURE_82586] == 0 && jiffies < timeout)
+			;
+		if (jiffies >= timeout)
+			TIMEOUT_MSG(__LINE__);
+	}
+
+	/*
+	 * queue receive commands to provide buffering
+	 */
+	if (!start_receive(dev, &adapter->tx_pcb))
+		printk("%s: start receive command failed \n", dev->name);
+	if (elp_debug >= 3)
+		printk("%s: start receive command sent\n", dev->name);
+
+	MOD_INC_USE_COUNT;
+
+	return 0;			/* Always succeed */
+}
+
+
+/******************************************************
+ *
+ * send a packet to the adapter
+ *
+ ******************************************************/
+
+static int
+send_packet (struct device * dev, unsigned char * ptr, int len)
+{
+	int i;
+	int timeout = 0;
+	elp_device * adapter;
+
+	/*
+	 * make sure the length is even and no shorter than 60 bytes
+	 */
+	unsigned int nlen = (((len < 60) ? 60 : len) + 1) & (~1);
+
+	CHECK_NULL(dev);
+	CHECK_NULL(ptr);
+
+	adapter = dev->priv;
+
+	if (nlen < len)
+		printk("Warning, bad length nlen=%d len=%d %s(%d)\n",nlen,len,filename,__LINE__);
+
+	/*
+	 * send the adapter a transmit packet command. Ignore segment and offset
+	 * and make sure the length is even
+	 */
+	adapter->tx_pcb.command = CMD_TRANSMIT_PACKET;
+	adapter->tx_pcb.length = sizeof(struct Xmit_pkt);
+	adapter->tx_pcb.data.xmit_pkt.buf_ofs
+		= adapter->tx_pcb.data.xmit_pkt.buf_seg = 0; /* Unused */
+	adapter->tx_pcb.data.xmit_pkt.pkt_len = nlen;
+	if (!send_pcb(dev, &adapter->tx_pcb)) {
+		return FALSE;
+	}
+
+	/*
+	 * write data to the adapter
+	 */
+	cli();
+	for (i = 0; i < (nlen/2);i++) {
+		while (((inb_status(dev->base_addr)&HRDY) == 0)
+		       && (timeout++ < 20000))
+			;
+		if (timeout >= 20000) {
+			sti();
+			printk("%s: timeout at %s(%d) writing word %d of %d ***\n",
+				dev->name,filename,__LINE__, i, nlen/2);
+			return FALSE;
+		}
+
+		outw_data(*(short *)ptr, dev->base_addr);
+		ptr +=2;
+	}
+	sti();
+
+	return TRUE;
+}
+
+/******************************************************
+ *
+ * start the transmitter
+ *    return 0 if sent OK, else return 1
+ *
+ ******************************************************/
+
+static int
+elp_start_xmit (struct sk_buff *skb, struct device *dev)
+{
+	CHECK_NULL(dev);
+
+	/*
+	 * not sure what this does, but the 3c509 driver does it, so...
+	 */
+	if (skb == NULL) {
+		dev_tint(dev);
+		return 0;
+	}
+
+	/*
+	 * if we ended up with a munged length, don't send it
+	 */
+	if (skb->len <= 0)
+		return 0;
+
+	if (elp_debug >= 3)
+		printk("%s: request to send packet of length %d\n", dev->name, (int)skb->len);
+
+	/*
+	 * if the transmitter is still busy, we have a transmit timeout...
+	 */
+	if (dev->tbusy) {
+		int tickssofar = jiffies - dev->trans_start;
+		int stat;
+		if (tickssofar < 50) /* was 500, AJT */
+			return 1;
+		printk("%s: transmit timed out, not resetting adapter\n", dev->name);
+		if (((stat=inb_status(dev->base_addr))&ACRF) != 0) 
+			printk("%s: hmmm...seemed to have missed an interrupt!\n", dev->name);
+		printk("%s: status %#02x\n", dev->name, stat);
+		dev->trans_start = jiffies;
+		dev->tbusy = 0;
+	}
+
+	/*
+	 * send the packet at skb->data for skb->len
+	 */
+	if (!send_packet(dev, skb->data, skb->len)) {
+		printk("%s: send packet PCB failed\n", dev->name);
+		return 1;
+	}
+
+	if (elp_debug >= 3)
+		printk("%s: packet of length %d sent\n", dev->name, (int)skb->len);
+
+
+	/*
+	 * start the transmit timeout
+	 */
+	dev->trans_start = jiffies;
+
+	/*
+	 * the transmitter is now busy
+	 */
+	dev->tbusy = 1;
+
+	/*
+	 * free the buffer
+	 */
+	dev_kfree_skb(skb, FREE_WRITE);
+
+	return 0;
+}
+
+/******************************************************
+ *
+ * return statistics on the board
+ *
+ ******************************************************/
+
+static struct enet_statistics *
+elp_get_stats (struct device *dev)
+{
+	elp_device *adapter = (elp_device *) dev->priv;
+
+	if (elp_debug >= 3)
+		printk("%s: request for stats\n", dev->name);
+
+	/* If the device is closed, just return the latest stats we have,
+	   - we cannot ask from the adapter without interrupts */
+	if (!dev->start)
+		return &adapter->stats;
+
+	/* send a get statistics command to the board */
+	adapter->tx_pcb.command = CMD_NETWORK_STATISTICS;
+	adapter->tx_pcb.length  = 0;
+	adapter->got[CMD_NETWORK_STATISTICS] = 0;
+	if (!send_pcb(dev, &adapter->tx_pcb))
+		printk("%s: couldn't send get statistics command\n", dev->name);
+	else {
+		int timeout = jiffies + TIMEOUT;
+		while (adapter->got[CMD_NETWORK_STATISTICS] == 0 && jiffies < timeout)
+			;
+		if (jiffies >= timeout) {
+			TIMEOUT_MSG(__LINE__);
+			return &adapter->stats;
+		}
+	}
+
+	/* statistics are now up to date */
+	return &adapter->stats;
+}
+
+/******************************************************
+ *
+ * close the board
+ *
+ ******************************************************/
+
+static int
+elp_close (struct device *dev)
+{
+	elp_device * adapter;
+
+	CHECK_NULL(dev);
+	adapter = dev->priv;
+	CHECK_NULL(adapter);
+
+	if (elp_debug >= 3)
+		printk("%s: request to close device\n", dev->name);
+
+	/* Someone may request the device statistic information even when
+	 * the interface is closed. The following will update the statistics
+	 * structure in the driver, so we'll be able to give current statistics.
+	 */
+	(void) elp_get_stats(dev);
+
+	/*
+	 * disable interrupts on the board
+	 */
+	outb_control(0x00, dev->base_addr);
+
+	/*
+	 *  flag transmitter as busy (i.e. not available)
+	 */
+	dev->tbusy = 1;
+
+	/*
+	 *  indicate device is closed
+	 */
+	dev->start = 0;
+
+	/*
+	 * release the IRQ
+	 */
+	free_irq(dev->irq);
+
+	/*
+	 * and we no longer have to map irq to dev either
+	 */
+	irq2dev_map[dev->irq] = 0;
+
+	MOD_DEC_USE_COUNT;
+
+	return 0;
+}
+
+
+/************************************************************
+ *
+ * Set multicast list
+ * num_addrs==0: clear mc_list
+ * num_addrs==-1: set promiscuous mode
+ * num_addrs>0: set mc_list
+ *
+ ************************************************************/
+
+static void
+elp_set_mc_list (struct device *dev)
+{
+	elp_device *adapter = (elp_device *) dev->priv;
+	struct dev_mc_list *dmi=dev->mc_list;
+	int i;
+
+	if (elp_debug >= 3)
+		printk("%s: request to set multicast list\n", dev->name);
+
+	if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI)))
+	{
+		/* send a "load multicast list" command to the board, max 10 addrs/cmd */
+		/* if num_addrs==0 the list will be cleared */
+		adapter->tx_pcb.command = CMD_LOAD_MULTICAST_LIST;
+		adapter->tx_pcb.length  = 6*dev->mc_count;
+		for (i=0;i<dev->mc_count;i++)
+		{
+			memcpy(adapter->tx_pcb.data.multicast[i], dmi->dmi_addr,6);
+			dmi=dmi->next;
+		}
+		adapter->got[CMD_LOAD_MULTICAST_LIST] = 0;
+		if (!send_pcb(dev, &adapter->tx_pcb))
+			printk("%s: couldn't send set_multicast command\n", dev->name);
+		else {
+			int timeout = jiffies + TIMEOUT;
+			while (adapter->got[CMD_LOAD_MULTICAST_LIST] == 0 && jiffies < timeout)
+				;
+			if (jiffies >= timeout) {
+				TIMEOUT_MSG(__LINE__);
+			}
+		}
+		if (dev->mc_count)
+			adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD | RECV_MULTI;
+		else /* num_addrs == 0 */
+			adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
+	} 
+	else
+		adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_PROMISC;
+	/*
+	 * configure adapter to receive messages (as specified above)
+	 * and wait for response
+	 */
+	if (elp_debug >= 3)
+		printk("%s: sending 82586 configure command\n", dev->name);
+	adapter->tx_pcb.command = CMD_CONFIGURE_82586;
+	adapter->tx_pcb.length  = 2;
+	adapter->got[CMD_CONFIGURE_82586]  = 0;
+	if (!send_pcb(dev, &adapter->tx_pcb))
+		printk("%s: couldn't send 82586 configure command\n", dev->name);
+	else {
+		int timeout = jiffies + TIMEOUT;
+		while (adapter->got[CMD_CONFIGURE_82586] == 0 && jiffies < timeout)
+			;
+		if (jiffies >= timeout)
+			TIMEOUT_MSG(__LINE__);
+	}
+}
+
+/******************************************************
+ *
+ * initialise Etherlink Plus board
+ *
+ ******************************************************/
+
+static void
+elp_init (struct device *dev)
+{
+	elp_device * adapter;
+
+	CHECK_NULL(dev);
+
+	/*
+	 * set ptrs to various functions
+	 */
+	dev->open = elp_open;	/* local */
+	dev->stop = elp_close;	/* local */
+	dev->get_stats = elp_get_stats;	/* local */
+	dev->hard_start_xmit = elp_start_xmit;	/* local */
+	dev->set_multicast_list = elp_set_mc_list;	/* local */
+
+	/* Setup the generic properties */
+	ether_setup(dev);
+
+	/*
+	 * setup ptr to adapter specific information
+	 */
+	adapter = (elp_device *)(dev->priv = kmalloc(sizeof(elp_device), GFP_KERNEL));
+	CHECK_NULL(adapter);
+	if (adapter == NULL)
+		return;
+	memset(&(adapter->stats), 0, sizeof(struct enet_statistics));
+
+	/*
+	 * memory information
+	 */
+	dev->mem_start = dev->mem_end = dev->rmem_end = dev->rmem_start = 0;
+}
+
+/************************************************************
+ *
+ * A couple of tests to see if there's 3C505 or not
+ * Called only by elp_autodetect
+ ************************************************************/
+
+static int
+elp_sense (struct device * dev)
+{
+	int timeout;
+	int addr=dev->base_addr;
+	const char *name=dev->name;
+	long flags;
+	byte orig_HCR, orig_HSR;
+
+	if (check_region(addr, 0xf)) 
+	  return -1;  
+
+	orig_HCR=inb_control(addr);
+	orig_HSR=inb_status(addr);
+
+	if (elp_debug > 0)
+		printk(search_msg, name, addr);
+
+	if (((orig_HCR==0xff) && (orig_HSR==0xff)) ||
+	    ((orig_HCR & DIR) != (orig_HSR & DIR))) {
+		if (elp_debug > 0)
+			printk(notfound_msg, 1);
+		return -1; /* It can't be 3c505 if HCR.DIR != HSR.DIR */
+	}
+
+	/* Enable interrupts - we need timers! */
+	save_flags(flags);
+	sti();
+
+	/* Wait for a while; the adapter may still be booting up */
+	if (elp_debug > 0)
+		printk(stilllooking_msg);
+	for (timeout = jiffies + (100 * 15); jiffies <= timeout; ) 
+		if (GET_ASF(addr) != ASF_PCB_END)
+			break;
+
+	if (orig_HCR & DIR) {
+		/* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */
+		outb_control(orig_HCR & ~DIR,addr);
+		timeout = jiffies+30;
+		while (jiffies < timeout)
+			;
+		restore_flags(flags);
+		if (inb_status(addr) & DIR) {
+			outb_control(orig_HCR,addr);
+			if (elp_debug > 0)
+				printk(notfound_msg, 2);
+			return -1;
+		}
+	} else {
+		/* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */
+		outb_control(orig_HCR | DIR,addr);
+		timeout = jiffies+300;
+		while (jiffies < timeout)
+			;
+		restore_flags(flags);
+		if (!(inb_status(addr) & DIR)) {
+			outb_control(orig_HCR,addr);
+			if (elp_debug > 0)
+				printk(notfound_msg, 3);
+			return -1;
+		}
+	}
+	/*
+	 * It certainly looks like a 3c505. If it has DMA enabled, it needs
+	 * a hard reset. Also, do a hard reset if selected at the compile time.
+	 */
+	if (elp_debug > 0)
+			printk(found_msg);
+
+	if (((orig_HCR==0x35) && (orig_HSR==0x5b)) || ELP_NEED_HARD_RESET)
+		adapter_hard_reset(dev);
+	return 0;
+}
+
+/*************************************************************
+ *
+ * Search through addr_list[] and try to find a 3C505
+ * Called only by eplus_probe
+ *************************************************************/
+
+static int
+elp_autodetect (struct device * dev)
+{
+	int idx=0;
+
+	/* if base address set, then only check that address
+	otherwise, run through the table */
+	if (dev->base_addr != 0) { /* dev->base_addr == 0 ==> plain autodetect */
+		if (elp_sense(dev) == 0)
+			return dev->base_addr;
+	} else while ( (dev->base_addr=addr_list[idx++]) ) {
+		if (elp_sense(dev) == 0)
+			return dev->base_addr;
+	}
+
+	/* could not find an adapter */
+	if (elp_debug > 0)
+		printk(couldnot_msg, dev->name);
+
+	return 0; /* Because of this, the layer above will return -ENODEV */
+}
+
+/******************************************************
+ *
+ * probe for an Etherlink Plus board at the specified address
+ *
+ ******************************************************/
+
+int
+elplus_probe (struct device *dev)
+{
+	elp_device adapter;
+	int i;
+
+	CHECK_NULL(dev);
+
+	/*
+	 *  setup adapter structure
+	 */
+
+	dev->base_addr = elp_autodetect(dev);
+	if ( !(dev->base_addr) )
+		return -ENODEV;
+
+	/*
+	 *  As we enter here from bootup, the adapter should have IRQs enabled,
+	 *  but we can as well enable them anyway.
+	 */
+	outb_control(inb_control(dev->base_addr) | CMDE, dev->base_addr);
+	autoirq_setup(0);
+
+	/*
+	 * use ethernet address command to probe for board in polled mode
+	 * (this also makes us the IRQ that we need for automatic detection)
+	 */
+	adapter.tx_pcb.command = CMD_STATION_ADDRESS;
+	adapter.tx_pcb.length  = 0;
+	if (!send_pcb   (dev, &adapter.tx_pcb) ||
+	    !receive_pcb(dev, &adapter.rx_pcb) ||
+	    (adapter.rx_pcb.command != CMD_ADDRESS_RESPONSE) ||
+	    (adapter.rx_pcb.length != 6)) {
+		printk("%s: not responding to first PCB\n", dev->name);
+		return -ENODEV;
+	}
+
+	if (dev->irq) { /* Is there a preset IRQ? */
+		if (dev->irq != autoirq_report(0)) {
+			printk("%s: Detected IRQ doesn't match user-defined one.\n",dev->name);
+			return -ENODEV;
+		}
+		/* if dev->irq == autoirq_report(0), all is well */
+	} else /* No preset IRQ; just use what we can detect */
+		dev->irq=autoirq_report(0);
+	switch (dev->irq) { /* Legal, sane? */
+		case 0:
+			printk("%s: No IRQ reported by autoirq_report().\n",dev->name);
+			printk("%s: Check the jumpers of your 3c505 board.\n",dev->name);
+			return -ENODEV;
+		case 1:
+		case 6:
+		case 8:
+		case 13: 
+			printk("%s: Impossible IRQ %d reported by autoirq_report().\n",
+			       dev->name, dev->irq);
+			return -ENODEV;
+	}
+	/*
+	 *  Now we have the IRQ number so we can disable the interrupts from
+	 *  the board until the board is opened.
+	 */
+	outb_control(inb_control(dev->base_addr) & ~CMDE, dev->base_addr);
+
+	/*
+	 * copy ethernet address into structure
+	 */
+	for (i = 0; i < 6; i++) 
+		dev->dev_addr[i] = adapter.rx_pcb.data.eth_addr[i];
+
+	/*
+	 * print remainder of startup message
+	 */
+	printk("%s: 3c505 card found at I/O %#lx using IRQ%d"
+	       " has address %02x:%02x:%02x:%02x:%02x:%02x\n",
+	       dev->name, dev->base_addr, dev->irq,
+	       dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
+	       dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
+
+	/*
+	 * and reserve the address region
+	 */
+	request_region(dev->base_addr, ELP_IO_EXTENT, "3c505");
+
+	/*
+	 * initialise the device
+	 */
+	elp_init(dev);
+	return 0;
+}
+
+#ifdef MODULE
+static char devicename[9] = { 0, };
+static struct device dev_3c505 = {
+	devicename, /* device name is inserted by linux/drivers/net/net_init.c */
+	0, 0, 0, 0,
+	0, 0,
+	0, 0, 0, NULL, elplus_probe };
+
+int io = 0x300;
+int irq = 0;
+
+int init_module(void)
+{
+	if (io == 0)
+		printk("3c505: You should not use auto-probing with insmod!\n");
+	dev_3c505.base_addr = io;
+	dev_3c505.irq       = irq;
+	if (register_netdev(&dev_3c505) != 0) {
+		printk("3c505: register_netdev() returned non-zero.\n");
+		return -EIO;
+	}
+	return 0;
+}
+
+void
+cleanup_module(void)
+{
+	unregister_netdev(&dev_3c505);
+	kfree(dev_3c505.priv);
+	dev_3c505.priv = NULL;
+
+	/* If we don't do this, we can't re-insmod it later. */
+	release_region(dev_3c505.base_addr, ELP_IO_EXTENT);
+}
+#endif /* MODULE */