Import 2.3.18pre1

[davej-history.git] / drivers / net / eexpress.c

/* Intel EtherExpress 16 device driver for Linux
 *
 * Written by John Sullivan, 1995
 * based on original code by Donald Becker, with changes by
 * Alan Cox and Pauline Middelink.
 *
 * Support for 8-bit mode by Zoltan Szilagyi <zoltans@cs.arizona.edu>
 *
 * Many modifications, and currently maintained, by
 * Philip Blundell <Philip.Blundell@pobox.com>
 * Added the Compaq LTE Alan Cox <alan@redhat.com>
 *
 * Note - this driver is experimental still - it has problems on faster
 * machines. Someone needs to sit down and go through it line by line with
 * a databook...
 */

/* The EtherExpress 16 is a fairly simple card, based on a shared-memory
 * design using the i82586 Ethernet coprocessor. It bears no relationship,
 * as far as I know, to the similarly-named "EtherExpress Pro" range.
 *
 * Historically, Linux support for these cards has been very bad. However,
 * things seem to be getting better slowly.
 */

/* If your card is confused about what sort of interface it has (eg it
 * persistently reports "10baseT" when none is fitted), running 'SOFTSET /BART'
 * or 'SOFTSET /LISA' from DOS seems to help.
 */

/* Here's the scoop on memory mapping.
 *
 * There are three ways to access EtherExpress card memory: either using the
 * shared-memory mapping, or using PIO through the dataport, or using PIO
 * through the "shadow memory" ports.
 *
 * The shadow memory system works by having the card map some of its memory
 * as follows:
 *
 * (the low five bits of the SMPTR are ignored)
 *
 * base+0x4000..400f memory at SMPTR+0..15
 * base+0x8000..800f memory at SMPTR+16..31
 * base+0xc000..c007 dubious stuff (memory at SMPTR+16..23 apparently)
 * base+0xc008..c00f memory at 0x0008..0x000f
 *
 * This last set (the one at c008) is particularly handy because the SCB
 * lives at 0x0008. So that set of ports gives us easy random access to data
 * in the SCB without having to mess around setting up pointers and the like.
 * We always use this method to access the SCB (via the scb_xx() functions).
 *
 * Dataport access works by aiming the appropriate (read or write) pointer
 * at the first address you're interested in, and then reading or writing from
 * the dataport. The pointers auto-increment after each transfer. We use
 * this for data transfer.
 *
 * We don't use the shared-memory system because it allegedly doesn't work on
 * all cards, and because it's a bit more prone to go wrong (it's one more
 * thing to configure...).
 */

/* Known bugs:
 *
 * - The card seems to want to give us two interrupts every time something
 * happens, where just one would be better.
 */

/*
 *
 * Note by Zoltan Szilagyi 10-12-96:
 *
 * I've succeeded in eliminating the "CU wedged" messages, and hence the
 * lockups, which were only occurring with cards running in 8-bit mode ("force
 * 8-bit operation" in Intel's SoftSet utility). This version of the driver
 * sets the 82586 and the ASIC to 8-bit mode at startup; it also stops the
 * CU before submitting a packet for transmission, and then restarts it as soon
 * as the process of handing the packet is complete. This is definitely an
 * unnecessary slowdown if the card is running in 16-bit mode; therefore one
 * should detect 16-bit vs 8-bit mode from the EEPROM settings and act 
 * accordingly. In 8-bit mode with this bugfix I'm getting about 150 K/s for
 * ftp's, which is significantly better than I get in DOS, so the overhead of
 * stopping and restarting the CU with each transmit is not prohibitive in
 * practice.
 *
 * Update by David Woodhouse 11/5/99:
 *
 * I've seen "CU wedged" messages in 16-bit mode, on the Alpha architecture.
 * I assume that this is because 16-bit accesses are actually handled as two
 * 8-bit accesses.
 */

#ifdef __alpha__
#define LOCKUP16 1
#endif
#ifndef LOCKUP16
#define LOCKUP16 0
#endif

#include <linux/config.h>
#include <linux/module.h>

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <linux/in.h>
#include <asm/system.h>
#include <asm/bitops.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/malloc.h>

#include <linux/spinlock.h>

#ifndef NET_DEBUG
#define NET_DEBUG 4
#endif

#include"eexpress.h"

#define EEXP_IO_EXTENT 16

/*
 * Private data declarations
 */

struct net_local
{
struct net_device_stats stats;
unsigned long last_tx;/* jiffies when last transmit started */
unsigned long init_time;/* jiffies when eexp_hw_init586 called */
unsigned short rx_first;/* first rx buf, same as RX_BUF_START */
unsigned short rx_last;/* last rx buf */
unsigned short rx_ptr;/* first rx buf to look at */
unsigned short tx_head;/* next free tx buf */
unsigned short tx_reap;/* first in-use tx buf */
unsigned short tx_tail;/* previous tx buf to tx_head */
unsigned short tx_link;/* last known-executing tx buf */
unsigned short last_tx_restart;/* set to tx_link when we
 restart the CU */
unsigned char started;
unsigned short rx_buf_start;
unsigned short rx_buf_end;
unsigned short num_tx_bufs;
unsigned short num_rx_bufs;
unsigned char width;/* 0 for 16bit, 1 for 8bit */
unsigned char was_promisc;
unsigned char old_mc_count;
 spinlock_t lock;
};

/* This is the code and data that is downloaded to the EtherExpress card's
 * memory at boot time.
 */

static unsigned short start_code[] = {
/* 0x0000 */
0x0001,/* ISCP: busy - cleared after reset */
0x0008,0x0000,0x0000,/* offset,address (lo,hi) of SCB */

0x0000,0x0000,/* SCB: status, commands */
0x0000,0x0000,/* links to first command block,
 first receive descriptor */
0x0000,0x0000,/* CRC error, alignment error counts */
0x0000,0x0000,/* out of resources, overrun error counts */

0x0000,0x0000,/* pad */
0x0000,0x0000,

/* 0x20 -- start of 82586 CU program */
#define CONF_LINK 0x20
0x0000,Cmd_Config,
0x0032,/* link to next command */
0x080c,/* 12 bytes follow : fifo threshold=8 */
0x2e40,/* don't rx bad frames
 * SRDY/ARDY => ext. sync. : preamble len=8
 * take addresses from data buffers
 * 6 bytes/address
 */
0x6000,/* default backoff method & priority
 * interframe spacing = 0x60 */
0xf200,/* slot time=0x200 
 * max collision retry = 0xf */
#define CONF_PROMISC 0x2e
0x0000,/* no HDLC : normal CRC : enable broadcast 
 * disable promiscuous/multicast modes */
0x003c,/* minimum frame length = 60 octets) */

0x0000,Cmd_SetAddr,
0x003e,/* link to next command */
#define CONF_HWADDR 0x38
0x0000,0x0000,0x0000,/* hardware address placed here */

0x0000,Cmd_MCast,
0x0076,/* link to next command */
#define CONF_NR_MULTICAST 0x44
0x0000,/* number of multicast addresses */
#define CONF_MULTICAST 0x46
0x0000,0x0000,0x0000,/* some addresses */
0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,
0x0000,0x0000,0x0000,

#define CONF_DIAG_RESULT 0x76
0x0000, Cmd_Diag,
0x007c,/* link to next command */

0x0000,Cmd_TDR|Cmd_INT,
0x0084,
#define CONF_TDR_RESULT 0x82
0x0000,

0x0000,Cmd_END|Cmd_Nop,/* end of configure sequence */
0x0084/* dummy link */
};

/* maps irq number to EtherExpress magic value */
static char irqrmap[] = {0,0,1,2,3,4,0,0,0,1,5,6,0,0,0,0};

/*
 * Prototypes for Linux interface
 */

externintexpress_probe(struct net_device *dev);
static inteexp_open(struct net_device *dev);
static inteexp_close(struct net_device *dev);
static struct net_device_stats *eexp_stats(struct net_device *dev);
static inteexp_xmit(struct sk_buff *buf,struct net_device *dev);

static voideexp_irq(int irq,void*dev_addr,struct pt_regs *regs);
static voideexp_set_multicast(struct net_device *dev);

/*
 * Prototypes for hardware access functions
 */

static voideexp_hw_rx_pio(struct net_device *dev);
static voideexp_hw_tx_pio(struct net_device *dev,unsigned short*buf,
unsigned short len);
static inteexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
static unsigned shorteexp_hw_readeeprom(unsigned short ioaddr,
unsigned char location);

static unsigned shorteexp_hw_lasttxstat(struct net_device *dev);
static voideexp_hw_txrestart(struct net_device *dev);

static voideexp_hw_txinit(struct net_device *dev);
static voideexp_hw_rxinit(struct net_device *dev);

static voideexp_hw_init586(struct net_device *dev);
static voideexp_setup_filter(struct net_device *dev);

static char*eexp_ifmap[]={"AUI","BNC","RJ45"};
enum eexp_iftype {AUI=0, BNC=1, TPE=2};

#define STARTED_RU 2
#define STARTED_CU 1

/*
 * Primitive hardware access functions.
 */

staticinlineunsigned shortscb_status(struct net_device *dev)
{
returninw(dev->base_addr +0xc008);
}

staticinlineunsigned shortscb_rdcmd(struct net_device *dev)
{
returninw(dev->base_addr +0xc00a);
}

staticinlinevoidscb_command(struct net_device *dev,unsigned short cmd)
{
outw(cmd, dev->base_addr +0xc00a);
}

staticinlinevoidscb_wrcbl(struct net_device *dev,unsigned short val)
{
outw(val, dev->base_addr +0xc00c);
}

staticinlinevoidscb_wrrfa(struct net_device *dev,unsigned short val)
{
outw(val, dev->base_addr +0xc00e);
}

staticinlinevoidset_loopback(struct net_device *dev)
{
outb(inb(dev->base_addr + Config) |2, dev->base_addr + Config);
}

staticinlinevoidclear_loopback(struct net_device *dev)
{
outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
}

staticinlineunsigned short intSHADOW(short int addr)
{
 addr &=0x1f;
if(addr >0xf) addr +=0x3ff0;
return addr +0x4000;
}

/*
 * Linux interface
 */

/*
 * checks for presence of EtherExpress card
 */

int __init express_probe(struct net_device *dev)
{
unsigned short*port;
static unsigned short ports[] = {0x300,0x310,0x270,0x320,0x340,0};
unsigned short ioaddr = dev->base_addr;

if(ioaddr&0xfe00)
returneexp_hw_probe(dev,ioaddr);
else if(ioaddr)
return ENXIO;

for(port=&ports[0] ; *port ; port++ )
{
unsigned short sum =0;
int i;
for( i=0; i<4; i++ )
{
unsigned short t;
 t =inb(*port + ID_PORT);
 sum |= (t>>4) << ((t &0x03)<<2);
}
if(sum==0xbaba&& !eexp_hw_probe(dev,*port))
return0;
}
return-ENODEV;
}

/*
 * open and initialize the adapter, ready for use
 */

static inteexp_open(struct net_device *dev)
{
int irq = dev->irq;
unsigned short ioaddr = dev->base_addr;
struct net_local *lp = (struct net_local *)dev->priv;

#if NET_DEBUG > 6
printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
#endif

if(!irq || !irqrmap[irq])
return-ENXIO;

if(request_irq(irq,&eexp_irq,0,"EtherExpress",dev))
return-EAGAIN;

request_region(ioaddr, EEXP_IO_EXTENT,"EtherExpress");
request_region(ioaddr+0x4000,16,"EtherExpress shadow");
request_region(ioaddr+0x8000,16,"EtherExpress shadow");
request_region(ioaddr+0xc000,16,"EtherExpress shadow");
 dev->tbusy =0;
 dev->interrupt =0;

if(lp->width) {
printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
}

eexp_hw_init586(dev);
 dev->start =1;
 MOD_INC_USE_COUNT;
#if NET_DEBUG > 6
printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
#endif
return0;
}

/*
 * close and disable the interface, leaving the 586 in reset.
 */

static inteexp_close(struct net_device *dev)
{
unsigned short ioaddr = dev->base_addr;
struct net_local *lp = dev->priv;

int irq = dev->irq;

 dev->tbusy =1;
 dev->start =0;

outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
 lp->started =0;
scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
outb(0,ioaddr+SIGNAL_CA);
free_irq(irq,dev);
outb(i586_RST,ioaddr+EEPROM_Ctrl);
release_region(ioaddr, EEXP_IO_EXTENT);
release_region(ioaddr+0x4000,16);
release_region(ioaddr+0x8000,16);
release_region(ioaddr+0xc000,16);

 MOD_DEC_USE_COUNT;
return0;
}

/*
 * Return interface stats
 */

static struct net_device_stats *eexp_stats(struct net_device *dev)
{
struct net_local *lp = (struct net_local *)dev->priv;

return&lp->stats;
}

/*
 * This gets called when a higher level thinks we are broken. Check that
 * nothing has become jammed in the CU.
 */

static voidunstick_cu(struct net_device *dev)
{
struct net_local *lp = (struct net_local *)dev->priv;
unsigned short ioaddr = dev->base_addr;

if(lp->started)
{
if((jiffies - dev->trans_start)>50)
{
if(lp->tx_link==lp->last_tx_restart)
{
unsigned short boguscount=200,rsst;
printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
 dev->name,scb_status(dev));
eexp_hw_txinit(dev);
 lp->last_tx_restart =0;
scb_wrcbl(dev, lp->tx_link);
scb_command(dev, SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);
while(!SCB_complete(rsst=scb_status(dev)))
{
if(!--boguscount)
{
 boguscount=200;
printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
 dev->name,rsst);
scb_wrcbl(dev, lp->tx_link);
scb_command(dev, SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);
}
}
 dev->tbusy =0;
mark_bh(NET_BH);
}
else
{
unsigned short status =scb_status(dev);
if(SCB_CUdead(status))
{
unsigned short txstatus =eexp_hw_lasttxstat(dev);
printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
 dev->name, status, txstatus);
eexp_hw_txrestart(dev);
}
else
{
unsigned short txstatus =eexp_hw_lasttxstat(dev);
if(dev->tbusy && !txstatus)
{
printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
 dev->name,status,txstatus);
eexp_hw_init586(dev);
 dev->tbusy =0;
mark_bh(NET_BH);
}
else
{
printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
}
}
}
}
}
else
{
if((jiffies-lp->init_time)>10)
{
unsigned short status =scb_status(dev);
printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
 dev->name, status);
eexp_hw_init586(dev);
 dev->tbusy =0;
mark_bh(NET_BH);
}
}
}

/*
 * Called to transmit a packet, or to allow us to right ourselves
 * if the kernel thinks we've died.
 */
static inteexp_xmit(struct sk_buff *buf,struct net_device *dev)
{
struct net_local *lp = (struct net_local *)dev->priv;
unsigned long flags;

#if NET_DEBUG > 6
printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
#endif

disable_irq(dev->irq);

/*
 * Best would be to use synchronize_irq(); spin_lock() here
 * lets make it work first..
 */

#ifdef CONFIG_SMP
spin_lock_irqsave(&lp->lock, flags);
#endif

/* If dev->tbusy is set, all our tx buffers are full but the kernel
 * is calling us anyway. Check that nothing bad is happening.
 */
if(dev->tbusy) {
int status =scb_status(dev);
unstick_cu(dev);
if((jiffies - lp->last_tx) < HZ)
{
#ifdef CONFIG_SMP
spin_unlock_irqrestore(&lp->lock, flags);
#endif

return1;
}
printk(KERN_INFO "%s: transmit timed out, %s?", dev->name,
(SCB_complete(status)?"lost interrupt":
"board on fire"));
 lp->stats.tx_errors++;
 dev->tbusy =0;
 lp->last_tx = jiffies;
if(!SCB_complete(status)) {
scb_command(dev, SCB_CUabort);
outb(0,dev->base_addr+SIGNAL_CA);
}
}

if(test_and_set_bit(0,(void*)&dev->tbusy))
{
 lp->stats.tx_dropped++;
}
else
{
unsigned short length = (ETH_ZLEN < buf->len) ? buf->len :
 ETH_ZLEN;
unsigned short*data = (unsigned short*)buf->data;

 lp->stats.tx_bytes += length;

eexp_hw_tx_pio(dev,data,length);
}
dev_kfree_skb(buf);
#ifdef CONFIG_SMP
spin_unlock_irqrestore(&lp->lock, flags);
#endif
enable_irq(dev->irq);
return0;
}

/*
 * Handle an EtherExpress interrupt
 * If we've finished initializing, start the RU and CU up.
 * If we've already started, reap tx buffers, handle any received packets,
 * check to make sure we've not become wedged.
 */

/*
 * Handle an EtherExpress interrupt
 * If we've finished initializing, start the RU and CU up.
 * If we've already started, reap tx buffers, handle any received packets,
 * check to make sure we've not become wedged.
 */

static unsigned shorteexp_start_irq(struct net_device *dev,
unsigned short status)
{
unsigned short ack_cmd =SCB_ack(status);
struct net_local *lp = (struct net_local *)dev->priv;
unsigned short ioaddr = dev->base_addr;
if((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
short diag_status, tdr_status;
while(SCB_CUstat(status)==2)
 status =scb_status(dev);
#if NET_DEBUG > 4
printk("%s: CU went non-active (status %04x)\n",
 dev->name, status);
#endif

outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
 diag_status =inw(ioaddr +SHADOW(CONF_DIAG_RESULT));
if(diag_status &1<<11) {
printk(KERN_WARNING "%s: 82586 failed self-test\n",
 dev->name);
}else if(!(diag_status &1<<13)) {
printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
}

outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
 tdr_status =inw(ioaddr +SHADOW(CONF_TDR_RESULT));
if(tdr_status & (TDR_SHORT|TDR_OPEN)) {
printk(KERN_WARNING "%s: TDR reports cable %s at %d tick%s\n", dev->name, (tdr_status & TDR_SHORT)?"short":"broken", tdr_status & TDR_TIME, ((tdr_status & TDR_TIME) !=1) ?"s":"");
}
else if(tdr_status & TDR_XCVRPROBLEM) {
printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
}
else if(tdr_status & TDR_LINKOK) {
#if NET_DEBUG > 4
printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
#endif
}else{
printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
 tdr_status);
}

 lp->started |= STARTED_CU;
scb_wrcbl(dev, lp->tx_link);
/* if the RU isn't running, start it now */
if(!(lp->started & STARTED_RU)) {
 ack_cmd |= SCB_RUstart;
scb_wrrfa(dev, lp->rx_buf_start);
 lp->rx_ptr = lp->rx_buf_start;
}
 ack_cmd |= SCB_CUstart |0x2000;
}

if((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) &&SCB_RUstat(status)==4)
 lp->started|=STARTED_RU;

return ack_cmd;
}

static voideexp_cmd_clear(struct net_device *dev)
{
unsigned long int oldtime = jiffies;
while(scb_rdcmd(dev) && ((jiffies-oldtime)<10));
if(scb_rdcmd(dev)) {
printk("%s: command didn't clear\n", dev->name);
}
}

static voideexp_irq(int irq,void*dev_info,struct pt_regs *regs)
{
struct net_device *dev = dev_info;
struct net_local *lp;
unsigned short ioaddr,status,ack_cmd;
unsigned short old_read_ptr, old_write_ptr;

if(dev==NULL)
{
printk(KERN_WARNING "eexpress: irq %d for unknown device\n",
 irq);
return;
}

 lp = (struct net_local *)dev->priv;
 ioaddr = dev->base_addr;

spin_lock(&lp->lock);

 old_read_ptr =inw(ioaddr+READ_PTR);
 old_write_ptr =inw(ioaddr+WRITE_PTR);

outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);


 dev->interrupt =1;

 status =scb_status(dev);

#if NET_DEBUG > 4
printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
#endif

if(lp->started == (STARTED_CU | STARTED_RU)) {

do{
eexp_cmd_clear(dev);

 ack_cmd =SCB_ack(status);
scb_command(dev, ack_cmd);
outb(0,ioaddr+SIGNAL_CA);

eexp_cmd_clear(dev);

if(SCB_complete(status)) {
if(!eexp_hw_lasttxstat(dev)) {
printk("%s: tx interrupt but no status\n", dev->name);
}
}

if(SCB_rxdframe(status))
eexp_hw_rx_pio(dev);

 status =scb_status(dev);
}while(status &0xc000);

if(SCB_RUdead(status))
{
printk(KERN_WARNING "%s: RU stopped: status %04x\n",
 dev->name,status);
#if 0
printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
outw(lp->cur_rfd, ioaddr+READ_PTR);
printk(KERN_WARNING "%s: [%04x]\n", dev->name,inw(ioaddr+DATAPORT));
outw(lp->cur_rfd+6, ioaddr+READ_PTR);
printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd=inw(ioaddr+DATAPORT));
outw(rbd, ioaddr+READ_PTR);
printk(KERN_WARNING "%s: [%04x %04x] ", dev->name,inw(ioaddr+DATAPORT),inw(ioaddr+DATAPORT));
outw(rbd+8, ioaddr+READ_PTR);
printk("[%04x]\n",inw(ioaddr+DATAPORT));
#endif
 lp->stats.rx_errors++;
#if 1
eexp_hw_rxinit(dev);
#else
 lp->cur_rfd = lp->first_rfd;
#endif
scb_wrrfa(dev, lp->rx_buf_start);
scb_command(dev, SCB_RUstart);
outb(0,ioaddr+SIGNAL_CA);
}
}else{
if(status &0x8000)
 ack_cmd =eexp_start_irq(dev, status);
else
 ack_cmd =SCB_ack(status);
scb_command(dev, ack_cmd);
outb(0,ioaddr+SIGNAL_CA);
}

eexp_cmd_clear(dev);

outb(SIRQ_en|irqrmap[irq],ioaddr+SET_IRQ);

 dev->interrupt =0;
#if NET_DEBUG > 6 
printk("%s: leaving eexp_irq()\n", dev->name);
#endif
outw(old_read_ptr, ioaddr+READ_PTR);
outw(old_write_ptr, ioaddr+WRITE_PTR);

spin_unlock(&lp->lock);
return;
}

/*
 * Hardware access functions
 */

/*
 * Set the cable type to use.
 */

static voideexp_hw_set_interface(struct net_device *dev)
{
unsigned char oldval =inb(dev->base_addr +0x300e);
 oldval &= ~0x82;
switch(dev->if_port) {
case TPE:
 oldval |=0x2;
case BNC:
 oldval |=0x80;
break;
}
outb(oldval, dev->base_addr+0x300e);
mdelay(20);
}

/*
 * Check all the receive buffers, and hand any received packets
 * to the upper levels. Basic sanity check on each frame
 * descriptor, though we don't bother trying to fix broken ones.
 */

static voideexp_hw_rx_pio(struct net_device *dev)
{
struct net_local *lp = (struct net_local *)dev->priv;
unsigned short rx_block = lp->rx_ptr;
unsigned short boguscount = lp->num_rx_bufs;
unsigned short ioaddr = dev->base_addr;
unsigned short status;

#if NET_DEBUG > 6
printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
#endif

do{
unsigned short rfd_cmd, rx_next, pbuf, pkt_len;

outw(rx_block, ioaddr + READ_PTR);
 status =inw(ioaddr + DATAPORT);

if(FD_Done(status))
{
 rfd_cmd =inw(ioaddr + DATAPORT);
 rx_next =inw(ioaddr + DATAPORT);
 pbuf =inw(ioaddr + DATAPORT);

outw(pbuf, ioaddr + READ_PTR);
 pkt_len =inw(ioaddr + DATAPORT);

if(rfd_cmd!=0x0000)
{
printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
 dev->name, rfd_cmd);
continue;
}
else if(pbuf!=rx_block+0x16)
{
printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
 dev->name, rx_block+0x16, pbuf);
continue;
}
else if((pkt_len &0xc000)!=0xc000)
{
printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
 dev->name, pkt_len &0xc000);
continue;
}
else if(!FD_OK(status))
{
 lp->stats.rx_errors++;
if(FD_CRC(status))
 lp->stats.rx_crc_errors++;
if(FD_Align(status))
 lp->stats.rx_frame_errors++;
if(FD_Resrc(status))
 lp->stats.rx_fifo_errors++;
if(FD_DMA(status))
 lp->stats.rx_over_errors++;
if(FD_Short(status))
 lp->stats.rx_length_errors++;
}
else
{
struct sk_buff *skb;
 pkt_len &=0x3fff;
 skb =dev_alloc_skb(pkt_len+16);
if(skb == NULL)
{
printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
 lp->stats.rx_dropped++;
break;
}
 skb->dev = dev;
skb_reserve(skb,2);
outw(pbuf+10, ioaddr+READ_PTR);
insw(ioaddr+DATAPORT,skb_put(skb,pkt_len),(pkt_len+1)>>1);
 skb->protocol =eth_type_trans(skb,dev);
netif_rx(skb);
 lp->stats.rx_packets++;
 lp->stats.rx_bytes += pkt_len;
}
outw(rx_block, ioaddr+WRITE_PTR);
outw(0, ioaddr+DATAPORT);
outw(0, ioaddr+DATAPORT);
 rx_block = rx_next;
}
}while(FD_Done(status) && boguscount--);
 lp->rx_ptr = rx_block;
}

/*
 * Hand a packet to the card for transmission
 * If we get here, we MUST have already checked
 * to make sure there is room in the transmit
 * buffer region.
 */

static voideexp_hw_tx_pio(struct net_device *dev,unsigned short*buf,
unsigned short len)
{
struct net_local *lp = (struct net_local *)dev->priv;
unsigned short ioaddr = dev->base_addr;

if(LOCKUP16 || lp->width) {
/* Stop the CU so that there is no chance that it
 jumps off to a bogus address while we are writing the
 pointer to the next transmit packet in 8-bit mode -- 
 this eliminates the "CU wedged" errors in 8-bit mode.
 (Zoltan Szilagyi 10-12-96) */
scb_command(dev, SCB_CUsuspend);
outw(0xFFFF, ioaddr+SIGNAL_CA);
}

outw(lp->tx_head, ioaddr + WRITE_PTR);

outw(0x0000, ioaddr + DATAPORT);
outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
outw(lp->tx_head+0x08, ioaddr + DATAPORT);
outw(lp->tx_head+0x0e, ioaddr + DATAPORT);

outw(0x0000, ioaddr + DATAPORT);
outw(0x0000, ioaddr + DATAPORT);
outw(lp->tx_head+0x08, ioaddr + DATAPORT);

outw(0x8000|len, ioaddr + DATAPORT);
outw(-1, ioaddr + DATAPORT);
outw(lp->tx_head+0x16, ioaddr + DATAPORT);
outw(0, ioaddr + DATAPORT);

outsw(ioaddr + DATAPORT, buf, (len+1)>>1);

outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
outw(lp->tx_head, ioaddr + DATAPORT);

 dev->trans_start = jiffies;
 lp->tx_tail = lp->tx_head;
if(lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
 lp->tx_head = TX_BUF_START;
else
 lp->tx_head += TX_BUF_SIZE;
if(lp->tx_head != lp->tx_reap)
 dev->tbusy =0;

if(LOCKUP16 || lp->width) {
/* Restart the CU so that the packet can actually
 be transmitted. (Zoltan Szilagyi 10-12-96) */
scb_command(dev, SCB_CUresume);
outw(0xFFFF, ioaddr+SIGNAL_CA);
}

 lp->stats.tx_packets++;
 lp->last_tx = jiffies;
}

/*
 * Sanity check the suspected EtherExpress card
 * Read hardware address, reset card, size memory and initialize buffer
 * memory pointers. These are held in dev->priv, in case someone has more
 * than one card in a machine.
 */

static int __init eexp_hw_probe(struct net_device *dev,unsigned short ioaddr)
{
unsigned short hw_addr[3];
unsigned char buswidth;
unsigned int memory_size;
int i;
unsigned short xsum =0;
struct net_local *lp;

printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);

outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
outb(0, ioaddr+EEPROM_Ctrl);
udelay(500);
outb(i586_RST, ioaddr+EEPROM_Ctrl);

 hw_addr[0] =eexp_hw_readeeprom(ioaddr,2);
 hw_addr[1] =eexp_hw_readeeprom(ioaddr,3);
 hw_addr[2] =eexp_hw_readeeprom(ioaddr,4);

/* Standard Address or Compaq LTE Address */
if(!((hw_addr[2]==0x00aa&& ((hw_addr[1] &0xff00)==0x0000)) ||
(hw_addr[2]==0x0080&& ((hw_addr[1] &0xff00)==0x5F00))))
{
printk(" rejected: invalid address %04x%04x%04x\n",
 hw_addr[2],hw_addr[1],hw_addr[0]);
return-ENODEV;
}

/* Calculate the EEPROM checksum. Carry on anyway if it's bad,
 * though.
 */
for(i =0; i <64; i++)
 xsum +=eexp_hw_readeeprom(ioaddr, i);
if(xsum !=0xbaba)
printk(" (bad EEPROM xsum 0x%02x)", xsum);

 dev->base_addr = ioaddr;
for( i=0; i<6; i++ )
 dev->dev_addr[i] = ((unsigned char*)hw_addr)[5-i];

{
static char irqmap[]={0,9,3,4,5,10,11,0};
unsigned short setupval =eexp_hw_readeeprom(ioaddr,0);

/* Use the IRQ from EEPROM if none was given */
if(!dev->irq)
 dev->irq = irqmap[setupval>>13];

 dev->if_port = !(setupval &0x1000) ? AUI :
eexp_hw_readeeprom(ioaddr,5) &0x1? TPE : BNC;

 buswidth = !((setupval &0x400) >>10);
}

 dev->priv = lp =kmalloc(sizeof(struct net_local), GFP_KERNEL);
if(!dev->priv)
return ENOMEM;

memset(dev->priv,0,sizeof(struct net_local));

printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
 eexp_ifmap[dev->if_port], buswidth?8:16);

eexp_hw_set_interface(dev);

/* Find out how much RAM we have on the card */
outw(0, dev->base_addr + WRITE_PTR);
for(i =0; i <32768; i++)
outw(0, dev->base_addr + DATAPORT);

for(memory_size =0; memory_size <64; memory_size++)
{
outw(memory_size<<10, dev->base_addr + READ_PTR);
if(inw(dev->base_addr+DATAPORT))
break;
outw(memory_size<<10, dev->base_addr + WRITE_PTR);
outw(memory_size |0x5000, dev->base_addr+DATAPORT);
outw(memory_size<<10, dev->base_addr + READ_PTR);
if(inw(dev->base_addr+DATAPORT) != (memory_size |0x5000))
break;
}

/* Sort out the number of buffers. We may have 16, 32, 48 or 64k
 * of RAM to play with.
 */
 lp->num_tx_bufs =4;
 lp->rx_buf_end =0x3ff6;
switch(memory_size)
{
case64:
 lp->rx_buf_end +=0x4000;
case48:
 lp->num_tx_bufs +=4;
 lp->rx_buf_end +=0x4000;
case32:
 lp->rx_buf_end +=0x4000;
case16:
printk(", %dk RAM)\n", memory_size);
break;
default:
printk(") bad memory size (%dk).\n", memory_size);
kfree(dev->priv);
return ENODEV;
break;
}

 lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
 lp->width = buswidth;

 dev->open = eexp_open;
 dev->stop = eexp_close;
 dev->hard_start_xmit = eexp_xmit;
 dev->get_stats = eexp_stats;
 dev->set_multicast_list = &eexp_set_multicast;
ether_setup(dev);
return0;
}

/*
 * Read a word from the EtherExpress on-board serial EEPROM.
 * The EEPROM contains 64 words of 16 bits.
 */
static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
unsigned char location)
{
unsigned short cmd =0x180|(location&0x7f);
unsigned short rval =0,wval = EC_CS|i586_RST;
int i;

outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
for(i=0x100; i ; i>>=1)
{
if(cmd&i)
 wval |= EC_Wr;
else
 wval &= ~EC_Wr;

outb(wval,ioaddr+EEPROM_Ctrl);
outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
eeprom_delay();
outb(wval,ioaddr+EEPROM_Ctrl);
eeprom_delay();
}
 wval &= ~EC_Wr;
outb(wval,ioaddr+EEPROM_Ctrl);
for(i=0x8000; i ; i>>=1)
{
outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
eeprom_delay();
if(inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
 rval |= i;
outb(wval,ioaddr+EEPROM_Ctrl);
eeprom_delay();
}
 wval &= ~EC_CS;
outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
eeprom_delay();
outb(wval,ioaddr+EEPROM_Ctrl);
eeprom_delay();
return rval;
}

/*
 * Reap tx buffers and return last transmit status.
 * if ==0 then either:
 * a) we're not transmitting anything, so why are we here?
 * b) we've died.
 * otherwise, Stat_Busy(return) means we've still got some packets
 * to transmit, Stat_Done(return) means our buffers should be empty
 * again
 */

static unsigned shorteexp_hw_lasttxstat(struct net_device *dev)
{
struct net_local *lp = (struct net_local *)dev->priv;
unsigned short tx_block = lp->tx_reap;
unsigned short status;

if((!dev->tbusy) && lp->tx_head==lp->tx_reap)
return0x0000;

do
{
outw(tx_block & ~31, dev->base_addr + SM_PTR);
 status =inw(dev->base_addr +SHADOW(tx_block));
if(!Stat_Done(status))
{
 lp->tx_link = tx_block;
return status;
}
else
{
 lp->last_tx_restart =0;
 lp->stats.collisions +=Stat_NoColl(status);
if(!Stat_OK(status))
{
char*whatsup = NULL;
 lp->stats.tx_errors++;
if(Stat_Abort(status))
 lp->stats.tx_aborted_errors++;
if(Stat_TNoCar(status)) {
 whatsup ="aborted, no carrier";
 lp->stats.tx_carrier_errors++;
}
if(Stat_TNoCTS(status)) {
 whatsup ="aborted, lost CTS";
 lp->stats.tx_carrier_errors++;
}
if(Stat_TNoDMA(status)) {
 whatsup ="FIFO underran";
 lp->stats.tx_fifo_errors++;
}
if(Stat_TXColl(status)) {
 whatsup ="aborted, too many collisions";
 lp->stats.tx_aborted_errors++;
}
if(whatsup)
printk(KERN_INFO "%s: transmit %s\n",
 dev->name, whatsup);
}
else
 lp->stats.tx_packets++;
}
if(tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
 lp->tx_reap = tx_block = TX_BUF_START;
else
 lp->tx_reap = tx_block += TX_BUF_SIZE;
 dev->tbusy =0;
mark_bh(NET_BH);
}
while(lp->tx_reap != lp->tx_head);

 lp->tx_link = lp->tx_tail +0x08;

return status;
}

/*
 * This should never happen. It is called when some higher routine detects
 * that the CU has stopped, to try to restart it from the last packet we knew
 * we were working on, or the idle loop if we had finished for the time.
 */

static voideexp_hw_txrestart(struct net_device *dev)
{
struct net_local *lp = (struct net_local *)dev->priv;
unsigned short ioaddr = dev->base_addr;

 lp->last_tx_restart = lp->tx_link;
scb_wrcbl(dev, lp->tx_link);
scb_command(dev, SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);

{
unsigned short boguscount=50,failcount=5;
while(!scb_status(dev))
{
if(!--boguscount)
{
if(--failcount)
{
printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name,scb_status(dev),scb_rdcmd(dev));
scb_wrcbl(dev, lp->tx_link);
scb_command(dev, SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);
 boguscount =100;
}
else
{
printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
eexp_hw_init586(dev);
 dev->tbusy =0;
mark_bh(NET_BH);
return;
}
}
}
}
}

/*
 * Writes down the list of transmit buffers into card memory. Each
 * entry consists of an 82586 transmit command, followed by a jump
 * pointing to itself. When we want to transmit a packet, we write
 * the data into the appropriate transmit buffer and then modify the
 * preceding jump to point at the new transmit command. This means that
 * the 586 command unit is continuously active.
 */

static voideexp_hw_txinit(struct net_device *dev)
{
struct net_local *lp = (struct net_local *)dev->priv;
unsigned short tx_block = TX_BUF_START;
unsigned short curtbuf;
unsigned short ioaddr = dev->base_addr;

for( curtbuf=0; curtbuf<lp->num_tx_bufs ; curtbuf++ )
{
outw(tx_block, ioaddr + WRITE_PTR);

outw(0x0000, ioaddr + DATAPORT);
outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
outw(tx_block+0x08, ioaddr + DATAPORT);
outw(tx_block+0x0e, ioaddr + DATAPORT);

outw(0x0000, ioaddr + DATAPORT);
outw(0x0000, ioaddr + DATAPORT);
outw(tx_block+0x08, ioaddr + DATAPORT);

outw(0x8000, ioaddr + DATAPORT);
outw(-1, ioaddr + DATAPORT);
outw(tx_block+0x16, ioaddr + DATAPORT);
outw(0x0000, ioaddr + DATAPORT);

 tx_block += TX_BUF_SIZE;
}
 lp->tx_head = TX_BUF_START;
 lp->tx_reap = TX_BUF_START;
 lp->tx_tail = tx_block - TX_BUF_SIZE;
 lp->tx_link = lp->tx_tail +0x08;
 lp->rx_buf_start = tx_block;

}

/*
 * Write the circular list of receive buffer descriptors to card memory.
 * The end of the list isn't marked, which means that the 82586 receive
 * unit will loop until buffers become available (this avoids it giving us
 * "out of resources" messages).
 */

static voideexp_hw_rxinit(struct net_device *dev)
{
struct net_local *lp = (struct net_local *)dev->priv;
unsigned short rx_block = lp->rx_buf_start;
unsigned short ioaddr = dev->base_addr;

 lp->num_rx_bufs =0;
 lp->rx_first = lp->rx_ptr = rx_block;
do
{
 lp->num_rx_bufs++;

outw(rx_block, ioaddr + WRITE_PTR);

outw(0, ioaddr + DATAPORT);outw(0, ioaddr+DATAPORT);
outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
outw(0xffff, ioaddr+DATAPORT);

outw(0x0000, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);

outw(0x0000, ioaddr+DATAPORT);
outw(rx_block + RX_BUF_SIZE +0x16, ioaddr+DATAPORT);
outw(rx_block +0x20, ioaddr+DATAPORT);
outw(0, ioaddr+DATAPORT);
outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);

 lp->rx_last = rx_block;
 rx_block += RX_BUF_SIZE;
}while(rx_block <= lp->rx_buf_end-RX_BUF_SIZE);


/* Make first Rx frame descriptor point to first Rx buffer
 descriptor */
outw(lp->rx_first +6, ioaddr+WRITE_PTR);
outw(lp->rx_first +0x16, ioaddr+DATAPORT);

/* Close Rx frame descriptor ring */
outw(lp->rx_last +4, ioaddr+WRITE_PTR);
outw(lp->rx_first, ioaddr+DATAPORT);

/* Close Rx buffer descriptor ring */
outw(lp->rx_last +0x16+2, ioaddr+WRITE_PTR);
outw(lp->rx_first +0x16, ioaddr+DATAPORT);

}

/*
 * Un-reset the 586, and start the configuration sequence. We don't wait for
 * this to finish, but allow the interrupt handler to start the CU and RU for
 * us. We can't start the receive/transmission system up before we know that
 * the hardware is configured correctly.
 */

static voideexp_hw_init586(struct net_device *dev)
{
struct net_local *lp = (struct net_local *)dev->priv;
unsigned short ioaddr = dev->base_addr;
int i;

#if NET_DEBUG > 6
printk("%s: eexp_hw_init586()\n", dev->name);
#endif

 lp->started =0;

set_loopback(dev);

outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);

/* Download the startup code */
outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
outw(lp->width?0x0001:0x0000, ioaddr +0x8006);
outw(0x0000, ioaddr +0x8008);
outw(0x0000, ioaddr +0x800a);
outw(0x0000, ioaddr +0x800c);
outw(0x0000, ioaddr +0x800e);

for(i =0; i < (sizeof(start_code)); i+=32) {
int j;
outw(i, ioaddr + SM_PTR);
for(j =0; j <16; j+=2)
outw(start_code[(i+j)/2],
 ioaddr+0x4000+j);
for(j =0; j <16; j+=2)
outw(start_code[(i+j+16)/2],
 ioaddr+0x8000+j);
}

/* Do we want promiscuous mode or multicast? */
outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
 i =inw(ioaddr+SHADOW(CONF_PROMISC));
outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
 ioaddr+SHADOW(CONF_PROMISC));
 lp->was_promisc = dev->flags & IFF_PROMISC;
#if 0
eexp_setup_filter(dev);
#endif

/* Write our hardware address */
outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
outw(((unsigned short*)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
outw(((unsigned short*)dev->dev_addr)[1],
 ioaddr+SHADOW(CONF_HWADDR+2));
outw(((unsigned short*)dev->dev_addr)[2],
 ioaddr+SHADOW(CONF_HWADDR+4));

eexp_hw_txinit(dev);
eexp_hw_rxinit(dev);

outb(0,ioaddr+EEPROM_Ctrl);
mdelay(5);

scb_command(dev,0xf000);
outb(0,ioaddr+SIGNAL_CA);

outw(0, ioaddr+SM_PTR);

{
unsigned short rboguscount=50,rfailcount=5;
while(inw(ioaddr+0x4000))
{
if(!--rboguscount)
{
printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
 dev->name);
scb_command(dev,0);
outb(0,ioaddr+SIGNAL_CA);
 rboguscount =100;
if(!--rfailcount)
{
printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
 dev->name);
return;
}
}
}
}

scb_wrcbl(dev, CONF_LINK);
scb_command(dev,0xf000|SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);

{
unsigned short iboguscount=50,ifailcount=5;
while(!scb_status(dev))
{
if(!--iboguscount)
{
if(--ifailcount)
{
printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
 dev->name,scb_status(dev),scb_rdcmd(dev));
scb_wrcbl(dev, CONF_LINK);
scb_command(dev,0xf000|SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);
 iboguscount =100;
}
else
{
printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
return;
}
}
}
}

clear_loopback(dev);
outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);

 lp->init_time = jiffies;
#if NET_DEBUG > 6
printk("%s: leaving eexp_hw_init586()\n", dev->name);
#endif
return;
}

static voideexp_setup_filter(struct net_device *dev)
{
struct dev_mc_list *dmi = dev->mc_list;
unsigned short ioaddr = dev->base_addr;
int count = dev->mc_count;
int i;
if(count >8) {
printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
 dev->name, count);
 count =8;
}

outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
outw(count, ioaddr+SHADOW(CONF_NR_MULTICAST));
for(i =0; i < count; i++) {
unsigned short*data = (unsigned short*)dmi->dmi_addr;
if(!dmi) {
printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
break;
}
if(dmi->dmi_addrlen != ETH_ALEN) {
printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
continue;
}
outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
}
}

/*
 * Set or clear the multicast filter for this adaptor.
 */
static void
eexp_set_multicast(struct net_device *dev)
{
unsigned short ioaddr = dev->base_addr;
struct net_local *lp = (struct net_local *)dev->priv;
int kick =0, i;
if((dev->flags & IFF_PROMISC) != lp->was_promisc) {
outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
 i =inw(ioaddr+SHADOW(CONF_PROMISC));
outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
 ioaddr+SHADOW(CONF_PROMISC));
 lp->was_promisc = dev->flags & IFF_PROMISC;
 kick =1;
}
if(!(dev->flags & IFF_PROMISC)) {
eexp_setup_filter(dev);
if(lp->old_mc_count != dev->mc_count) {
 kick =1;
 lp->old_mc_count = dev->mc_count;
}
}
if(kick) {
unsigned long oj;
scb_command(dev, SCB_CUsuspend);
outb(0, ioaddr+SIGNAL_CA);
outb(0, ioaddr+SIGNAL_CA);
#if 0
printk("%s: waiting for CU to go suspended\n", dev->name);
#endif
 oj = jiffies;
while((SCB_CUstat(scb_status(dev)) ==2) &&
((jiffies-oj) <2000));
if(SCB_CUstat(scb_status(dev)) ==2)
printk("%s: warning, CU didn't stop\n", dev->name);
 lp->started &= ~(STARTED_CU);
scb_wrcbl(dev, CONF_LINK);
scb_command(dev, SCB_CUstart);
outb(0, ioaddr+SIGNAL_CA);
}
}


/*
 * MODULE stuff
 */

#ifdef MODULE

#define EEXP_MAX_CARDS 4/* max number of cards to support */
#define NAMELEN 8/* max length of dev->name (inc null) */

static char namelist[NAMELEN * EEXP_MAX_CARDS] = {0, };

static struct net_device dev_eexp[EEXP_MAX_CARDS] =
{
{ NULL,/* will allocate dynamically */
0,0,0,0,0,0,0,0,0, NULL, express_probe },
};

static int irq[EEXP_MAX_CARDS] = {0, };
static int io[EEXP_MAX_CARDS] = {0, };

MODULE_PARM(io,"1-"__MODULE_STRING(EEXP_MAX_CARDS)"i");
MODULE_PARM(irq,"1-"__MODULE_STRING(EEXP_MAX_CARDS)"i");

/* Ideally the user would give us io=, irq= for every card. If any parameters
 * are specified, we verify and then use them. If no parameters are given, we
 * autoprobe for one card only.
 */
intinit_module(void)
{
int this_dev, found =0;

for(this_dev =0; this_dev < EEXP_MAX_CARDS; this_dev++) {
struct net_device *dev = &dev_eexp[this_dev];
 dev->name = namelist + (NAMELEN*this_dev);
 dev->irq = irq[this_dev];
 dev->base_addr = io[this_dev];
if(io[this_dev] ==0) {
if(this_dev)break;
printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
}
if(register_netdev(dev) !=0) {
printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
if(found !=0)return0;
return-ENXIO;
}
 found++;
}
return0;
}

voidcleanup_module(void)
{
int this_dev;

for(this_dev =0; this_dev < EEXP_MAX_CARDS; this_dev++) {
struct net_device *dev = &dev_eexp[this_dev];
if(dev->priv != NULL) {
unregister_netdev(dev);
kfree(dev->priv);
 dev->priv = NULL;
release_region(dev->base_addr, EEXP_IO_EXTENT);
}
}
}
#endif

/*
 * Local Variables:
 * c-file-style: "linux"
 * tab-width: 8
 * End:
 */