Ok. I didn't make 2.4.0 in 2000. Tough. I tried, but we had some

[davej-history.git] / drivers / net / 3c505.c

/*
 * Linux Ethernet device driver for the 3Com Etherlink Plus (3C505)
 * By Craig Southeren, Juha Laiho and Philip Blundell
 *
 * 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.
 *
 * $Id: 3c505.c,v 1.10 1996/04/16 13:06:27 phil Exp $
 *
 * 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>
 * More debugging, DMA support, currently maintained by
 * Philip Blundell <Philip.Blundell@pobox.com>
 * Multicard/soft configurable dma channel/rev 2 hardware support
 * by Christopher Collins <ccollins@pcug.org.au>
 */

/* Theory of operation:
 *
 * The 3c505 is quite an intelligent board. All communication with it is done
 * by means of Primary Command Blocks (PCBs); these are transferred using PIO
 * through the command register. The card has 256k of on-board RAM, which is
 * used to buffer received packets. It might seem at first that more buffers
 * are better, but in fact this isn't true. From my tests, it seems that
 * more than about 10 buffers are unnecessary, and there is a noticeable
 * performance hit in having more active on the card. So the majority of the
 * card's memory isn't, in fact, used. Sadly, the card only has one transmit
 * buffer and, short of loading our own firmware into it (which is what some
 * drivers resort to) there's nothing we can do about this.
 *
 * We keep up to 4 "receive packet" commands active on the board at a time.
 * When a packet comes in, so long as there is a receive command active, the
 * board will send us a "packet received" PCB and then add the data for that
 * packet to the DMA queue. If a DMA transfer is not already in progress, we
 * set one up to start uploading the data. We have to maintain a list of
 * backlogged receive packets, because the card may decide to tell us about
 * a newly-arrived packet at any time, and we may not be able to start a DMA
 * transfer immediately (ie one may already be going on). We can't NAK the
 * PCB, because then it would throw the packet away.
 *
 * Trying to send a PCB to the card at the wrong moment seems to have bad
 * effects. If we send it a transmit PCB while a receive DMA is happening,
 * it will just NAK the PCB and so we will have wasted our time. Worse, it
 * sometimes seems to interrupt the transfer. The majority of the low-level
 * code is protected by one huge semaphore -- "busy" -- which is set whenever
 * it probably isn't safe to do anything to the card. The receive routine
 * must gain a lock on "busy" before it can start a DMA transfer, and the
 * transmit routine must gain a lock before it sends the first PCB to the card.
 * The send_pcb() routine also has an internal semaphore to protect it against
 * being re-entered (which would be disastrous) -- this is needed because
 * several things can happen asynchronously (re-priming the receiver and
 * asking the card for statistics, for example). send_pcb() will also refuse
 * to talk to the card at all if a DMA upload is happening. The higher-level
 * networking code will reschedule a later retry if some part of the driver
 * is blocked. In practice, this doesn't seem to happen very often.
 */

/* This driver may now work with revision 2.x hardware, since all the read
 * operations on the HCR have been removed (we now keep our own softcopy).
 * But I don't have an old card to test it on.
 *
 * This has had the bad effect that the autoprobe routine is now a bit
 * less friendly to other devices. However, it was never very good.
 * before, so I doubt it will hurt anybody.
 */

/* The driver is a mess. I took Craig's and Juha's code, and hacked it firstly
 * to make it more reliable, and secondly to add DMA mode. Many things could
 * probably be done better; the concurrency protection is particularly awful.
 */

#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 <linux/spinlock.h>
#include <asm/bitops.h>
#include <asm/io.h>
#include <asm/dma.h>

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

#include"3c505.h"

/*********************************************************
 *
 * define debug messages here as common strings to reduce space
 *
 *********************************************************/

static const char*filename = __FILE__;

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 char search_msg[] __initdata ="%s: Looking for 3c505 adapter at address %#x...";

static char stilllooking_msg[] __initdata ="still looking...";

static char found_msg[] __initdata ="found.\n";

static char notfound_msg[] __initdata ="not found (reason = %d)\n";

static char couldnot_msg[] __initdata ="%s: 3c505 not found\n";

/*********************************************************
 *
 * various other debug stuff
 *
 *********************************************************/

#ifdef ELP_DEBUG
static const int elp_debug = ELP_DEBUG;
#else
static const 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
 */

/*****************************************************************
 *
 * 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!
 *****************************************************************/

static int addr_list[] __initdata = {0x300,0x280,0x310,0};

/* Dma Memory related stuff */

static unsigned longdma_mem_alloc(int size)
{
int order =get_order(size);

return__get_dma_pages(GFP_KERNEL, order);
}


/*****************************************************************
 *
 * Functions for I/O (note the inline !)
 *
 *****************************************************************/

staticinlineunsigned charinb_status(unsigned int base_addr)
{
returninb(base_addr + PORT_STATUS);
}

staticinlineintinb_command(unsigned int base_addr)
{
returninb(base_addr + PORT_COMMAND);
}

staticinlinevoidoutb_control(unsigned char val,struct net_device *dev)
{
outb(val, dev->base_addr + PORT_CONTROL);
((elp_device *)(dev->priv))->hcr_val = val;
}

#define HCR_VAL(x) (((elp_device *)((x)->priv))->hcr_val)

staticinlinevoidoutb_command(unsigned char val,unsigned int base_addr)
{
outb(val, base_addr + PORT_COMMAND);
}

staticinlineunsigned intinw_data(unsigned int base_addr)
{
returninw(base_addr + PORT_DATA);
}

staticinlinevoidoutw_data(unsigned int val,unsigned int base_addr)
{
outw(val, base_addr + PORT_DATA);
}

staticinlineunsigned intbacklog_next(unsigned int n)
{
return(n +1) % BACKLOG_SIZE;
}

/*****************************************************************
 *
 * 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)

staticinlineintget_status(unsigned int base_addr)
{
int timeout = jiffies +10*HZ/100;
registerint stat1;
do{
 stat1 =inb_status(base_addr);
}while(stat1 !=inb_status(base_addr) &&time_before(jiffies, timeout));
if(time_after_eq(jiffies, timeout))
TIMEOUT_MSG(__LINE__);
return stat1;
}

staticinlinevoidset_hsf(struct net_device *dev,int hsf)
{
cli();
outb_control((HCR_VAL(dev) & ~HSF_PCB_MASK) | hsf, dev);
sti();
}

static intstart_receive(struct net_device *, pcb_struct *);

inlinestatic voidadapter_reset(struct net_device *dev)
{
int timeout;
 elp_device *adapter = dev->priv;
unsigned char orig_hcr = adapter->hcr_val;

outb_control(0, dev);

if(inb_status(dev->base_addr) & ACRF) {
do{
inb_command(dev->base_addr);
 timeout = jiffies +2*HZ/100;
while(time_before_eq(jiffies, timeout) && !(inb_status(dev->base_addr) & ACRF));
}while(inb_status(dev->base_addr) & ACRF);
set_hsf(dev, HSF_PCB_NAK);
}
outb_control(adapter->hcr_val | ATTN |DIR, dev);
 timeout = jiffies +1*HZ/100;
while(time_before_eq(jiffies, timeout));
outb_control(adapter->hcr_val & ~ATTN, dev);
 timeout = jiffies +1*HZ/100;
while(time_before_eq(jiffies, timeout));
outb_control(adapter->hcr_val | FLSH, dev);
 timeout = jiffies +1*HZ/100;
while(time_before_eq(jiffies, timeout));
outb_control(adapter->hcr_val & ~FLSH, dev);
 timeout = jiffies +1*HZ/100;
while(time_before_eq(jiffies, timeout));

outb_control(orig_hcr, dev);
if(!start_receive(dev, &adapter->tx_pcb))
printk("%s: start receive command failed\n", dev->name);
}

/* Check to make sure that a DMA transfer hasn't timed out. This should
 * never happen in theory, but seems to occur occasionally if the card gets
 * prodded at the wrong time.
 */
staticinlinevoidcheck_3c505_dma(struct net_device *dev)
{
 elp_device *adapter = dev->priv;
if(adapter->dmaing &&time_after(jiffies, adapter->current_dma.start_time +10)) {
unsigned long flags, f;
printk("%s: DMA %s timed out, %d bytes left\n", dev->name, adapter->current_dma.direction ?"download":"upload",get_dma_residue(dev->dma));
save_flags(flags);
cli();
 adapter->dmaing =0;
 adapter->busy =0;

 f=claim_dma_lock();
disable_dma(dev->dma);
release_dma_lock(f);

if(adapter->rx_active)
 adapter->rx_active--;
outb_control(adapter->hcr_val & ~(DMAE | TCEN |DIR), dev);
restore_flags(flags);
}
}

/* Primitive functions used by send_pcb() */
staticinlineunsigned intsend_pcb_slow(unsigned int base_addr,unsigned char byte)
{
unsigned int timeout;
outb_command(byte, base_addr);
for(timeout = jiffies +5*HZ/100;time_before(jiffies, timeout);) {
if(inb_status(base_addr) & HCRE)
return FALSE;
}
printk("3c505: send_pcb_slow timed out\n");
return TRUE;
}

staticinlineunsigned intsend_pcb_fast(unsigned int base_addr,unsigned char byte)
{
unsigned int timeout;
outb_command(byte, base_addr);
for(timeout =0; timeout <40000; timeout++) {
if(inb_status(base_addr) & HCRE)
return FALSE;
}
printk("3c505: send_pcb_fast timed out\n");
return TRUE;
}

/* Check to see if the receiver needs restarting, and kick it if so */
staticinlinevoidprime_rx(struct net_device *dev)
{
 elp_device *adapter = dev->priv;
while(adapter->rx_active < ELP_RX_PCBS &&netif_running(dev)) {
if(!start_receive(dev, &adapter->itx_pcb))
break;
}
}

/*****************************************************************
 *
 * 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
 *
 *****************************************************************/

/* This can be quite slow -- the adapter is allowed to take up to 40ms
 * to respond to the initial interrupt.
 *
 * We run initially with interrupts turned on, but with a semaphore set
 * so that nobody tries to re-enter this code. Once the first byte has
 * gone through, we turn interrupts off and then send the others (the
 * timeout is reduced to 500us).
 */

static intsend_pcb(struct net_device *dev, pcb_struct * pcb)
{
int i;
int timeout;
 elp_device *adapter = dev->priv;

check_3c505_dma(dev);

if(adapter->dmaing && adapter->current_dma.direction ==0)
return FALSE;

/* Avoid contention */
if(test_and_set_bit(1, &adapter->send_pcb_semaphore)) {
if(elp_debug >=3) {
printk("%s: send_pcb entered while threaded\n", dev->name);
}
return FALSE;
}
/*
 * load each byte into the command register and
 * wait for the HCRE bit to indicate the adapter
 * had read the byte
 */
set_hsf(dev,0);

if(send_pcb_slow(dev->base_addr, pcb->command))
goto abort;

cli();

if(send_pcb_fast(dev->base_addr, pcb->length))
goto sti_abort;

for(i =0; i < pcb->length; i++) {
if(send_pcb_fast(dev->base_addr, pcb->data.raw[i]))
goto sti_abort;
}

outb_control(adapter->hcr_val |3, dev);/* signal end of PCB */
outb_command(2+ pcb->length, dev->base_addr);

/* now wait for the acknowledgement */
sti();

for(timeout = jiffies +5*HZ/100;time_before(jiffies, timeout);) {
switch(GET_ASF(dev->base_addr)) {
case ASF_PCB_ACK:
 adapter->send_pcb_semaphore =0;
return TRUE;
break;
case ASF_PCB_NAK:
#ifdef ELP_DEBUG
printk(KERN_DEBUG "%s: send_pcb got NAK\n", dev->name);
#endif
goto abort;
break;
}
}

if(elp_debug >=1)
printk("%s: timeout waiting for PCB acknowledge (status %02x)\n", dev->name,inb_status(dev->base_addr));

 sti_abort:
sti();
 abort:
 adapter->send_pcb_semaphore =0;
return FALSE;
}


/*****************************************************************
 *
 * receive_pcb
 * Read a PCB from 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 intreceive_pcb(struct net_device *dev, pcb_struct * pcb)
{
int i, j;
int total_length;
int stat;
int timeout;

 elp_device *adapter = dev->priv;

set_hsf(dev,0);

/* get the command code */
 timeout = jiffies +2*HZ/100;
while(((stat =get_status(dev->base_addr)) & ACRF) ==0&&time_before(jiffies, timeout));
if(time_after_eq(jiffies, timeout)) {
TIMEOUT_MSG(__LINE__);
return FALSE;
}
 pcb->command =inb_command(dev->base_addr);

/* read the data length */
 timeout = jiffies +3*HZ/100;
while(((stat =get_status(dev->base_addr)) & ACRF) ==0&&time_before(jiffies, timeout));
if(time_after_eq(jiffies, timeout)) {
TIMEOUT_MSG(__LINE__);
printk("%s: status %02x\n", dev->name, stat);
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, HSF_PCB_NAK);
return FALSE;
}

if(pcb->command == CMD_RECEIVE_PACKET_COMPLETE) {
if(test_and_set_bit(0, (void*) &adapter->busy)) {
if(backlog_next(adapter->rx_backlog.in) == adapter->rx_backlog.out) {
set_hsf(dev, HSF_PCB_NAK);
printk("%s: PCB rejected, transfer in progress and backlog full\n", dev->name);
 pcb->command =0;
return TRUE;
}else{
 pcb->command =0xff;
}
}
}
set_hsf(dev, HSF_PCB_ACK);
return TRUE;
}

/******************************************************
 *
 * queue a receive command on the adapter so we will get an
 * interrupt when a packet is received.
 *
 ******************************************************/

static intstart_receive(struct net_device *dev, pcb_struct * tx_pcb)
{
int status;
 elp_device *adapter = dev->priv;

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 */
 status =send_pcb(dev, tx_pcb);
if(status)
 adapter->rx_active++;
return status;
}

/******************************************************
 *
 * 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 voidreceive_packet(struct net_device *dev,int len)
{
int rlen;
 elp_device *adapter = dev->priv;
void*target;
struct sk_buff *skb;
unsigned long flags;

 rlen = (len +1) & ~1;
 skb =dev_alloc_skb(rlen +2);

if(!skb) {
printk("%s: memory squeeze, dropping packet\n", dev->name);
 target = adapter->dma_buffer;
 adapter->current_dma.target = NULL;
}else{
skb_reserve(skb,2);
 target =skb_put(skb, rlen);
if(virt_to_bus(target + rlen) >= MAX_DMA_ADDRESS) {
 adapter->current_dma.target = target;
 target = adapter->dma_buffer;
}else{
 adapter->current_dma.target = NULL;
}
}

/* if this happens, we die */
if(test_and_set_bit(0, (void*) &adapter->dmaing))
printk("%s: rx blocked, DMA in progress, dir %d\n", dev->name, adapter->current_dma.direction);

 skb->dev = dev;
 adapter->current_dma.direction =0;
 adapter->current_dma.length = rlen;
 adapter->current_dma.skb = skb;
 adapter->current_dma.start_time = jiffies;

outb_control(adapter->hcr_val |DIR| TCEN | DMAE, dev);

 flags=claim_dma_lock();
disable_dma(dev->dma);
clear_dma_ff(dev->dma);
set_dma_mode(dev->dma,0x04);/* dma read */
set_dma_addr(dev->dma,virt_to_bus(target));
set_dma_count(dev->dma, rlen);
enable_dma(dev->dma);
release_dma_lock(flags);

if(elp_debug >=3) {
printk("%s: rx DMA transfer started\n", dev->name);
}

if(adapter->rx_active)
 adapter->rx_active--;

if(!adapter->busy)
printk("%s: receive_packet called, busy not set.\n", dev->name);
}

/******************************************************
 *
 * interrupt handler
 *
 ******************************************************/

static voidelp_interrupt(int irq,void*dev_id,struct pt_regs *reg_ptr)
{
int len;
int dlen;
int icount =0;
struct net_device *dev;
 elp_device *adapter;
int timeout;

 dev = dev_id;
 adapter = (elp_device *) dev->priv;

spin_lock(&adapter->lock);

do{
/*
 * has a DMA transfer finished?
 */
if(inb_status(dev->base_addr) & DONE) {
if(!adapter->dmaing) {
printk("%s: phantom DMA completed\n", dev->name);
}
if(elp_debug >=3) {
printk("%s: %s DMA complete, status %02x\n", dev->name, adapter->current_dma.direction ?"tx":"rx",inb_status(dev->base_addr));
}

outb_control(adapter->hcr_val & ~(DMAE | TCEN |DIR), dev);
if(adapter->current_dma.direction) {
dev_kfree_skb_irq(adapter->current_dma.skb);
}else{
struct sk_buff *skb = adapter->current_dma.skb;
if(skb) {
if(adapter->current_dma.target) {
/* have already done the skb_put() */
memcpy(adapter->current_dma.target, adapter->dma_buffer, adapter->current_dma.length);
}
 skb->protocol =eth_type_trans(skb,dev);
 adapter->stats.rx_bytes += skb->len;
netif_rx(skb);
}
}
 adapter->dmaing =0;
if(adapter->rx_backlog.in != adapter->rx_backlog.out) {
int t = adapter->rx_backlog.length[adapter->rx_backlog.out];
 adapter->rx_backlog.out =backlog_next(adapter->rx_backlog.out);
if(elp_debug >=2)
printk("%s: receiving backlogged packet (%d)\n", dev->name, t);
receive_packet(dev, t);
}else{
 adapter->busy =0;
}
}else{
/* has one timed out? */
check_3c505_dma(dev);
}

/*
 * receive a PCB from the adapter
 */
 timeout = jiffies +3*HZ/100;
while((inb_status(dev->base_addr) & ACRF) !=0&&time_before(jiffies, timeout)) {
if(receive_pcb(dev, &adapter->irx_pcb)) {
switch(adapter->irx_pcb.command)
{
case0:
break;
/*
 * received a packet - this must be handled fast
 */
case0xff:
case CMD_RECEIVE_PACKET_COMPLETE:
/* if the device isn't open, don't pass packets up the stack */
if(!netif_running(dev))
break;
 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(KERN_ERR "%s: interrupt - packet not received correctly\n", dev->name);
}else{
if(elp_debug >=3) {
printk("%s: interrupt - packet received of length %i (%i)\n", dev->name, len, dlen);
}
if(adapter->irx_pcb.command ==0xff) {
if(elp_debug >=2)
printk("%s: adding packet to backlog (len = %d)\n", dev->name, dlen);
 adapter->rx_backlog.length[adapter->rx_backlog.in] = dlen;
 adapter->rx_backlog.in =backlog_next(adapter->rx_backlog.in);
}else{
receive_packet(dev, dlen);
}
if(elp_debug >=3)
printk("%s: packet received\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->stats.rx_over_errors += adapter->irx_pcb.data.netstat.err_res;
 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(!netif_running(dev))
break;
switch(adapter->irx_pcb.data.xmit_resp.c_stat) {
case0xffff:
 adapter->stats.tx_aborted_errors++;
printk(KERN_INFO "%s: transmit timed out, network cable problem?\n", dev->name);
break;
case0xfffe:
 adapter->stats.tx_fifo_errors++;
printk(KERN_INFO "%s: transmit timed out, FIFO underrun\n", dev->name);
break;
}
netif_wake_queue(dev);
break;

/*
 * some unknown PCB
 */
default:
printk(KERN_DEBUG "%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);
}
}

}while(icount++ <5&& (inb_status(dev->base_addr) & (ACRF | DONE)));

prime_rx(dev);

/*
 * indicate no longer in interrupt routine
 */
spin_unlock(&adapter->lock);
}


/******************************************************
 *
 * open the board
 *
 ******************************************************/

static intelp_open(struct net_device *dev)
{
 elp_device *adapter;
int retval;

 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(0, dev);

/*
 * clear any pending interrupts
 */
inb_command(dev->base_addr);
adapter_reset(dev);

/*
 * no receive PCBs active
 */
 adapter->rx_active =0;

 adapter->busy =0;
 adapter->send_pcb_semaphore =0;
 adapter->rx_backlog.in =0;
 adapter->rx_backlog.out =0;

spin_lock_init(&adapter->lock);

/*
 * install our interrupt service routine
 */
if((retval =request_irq(dev->irq, &elp_interrupt,0, dev->name, dev))) {
printk(KERN_ERR "%s: could not allocate IRQ%d\n", dev->name, dev->irq);
return retval;
}
if((retval =request_dma(dev->dma, dev->name))) {
free_irq(dev->irq, dev);
printk(KERN_ERR "%s: could not allocate DMA%d channel\n", dev->name, dev->dma);
return retval;
}
 adapter->dma_buffer = (void*)dma_mem_alloc(DMA_BUFFER_SIZE);
if(!adapter->dma_buffer) {
printk(KERN_ERR "%s: could not allocate DMA buffer\n", dev->name);
free_dma(dev->dma);
free_irq(dev->irq, dev);
return-ENOMEM;
}
 adapter->dmaing =0;

/*
 * enable interrupts on the board
 */
outb_control(CMDE, dev);

/*
 * configure adapter memory: we need 10 multicast addresses, default==0
 */
if(elp_debug >=3)
printk(KERN_DEBUG "%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&&time_before(jiffies, timeout));
if(time_after_eq(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&&time_before(jiffies, timeout));
if(time_after_eq(jiffies, timeout))
TIMEOUT_MSG(__LINE__);
}

/* enable burst-mode DMA */
/* outb(0x1, dev->base_addr + PORT_AUXDMA); */

/*
 * queue receive commands to provide buffering
 */
prime_rx(dev);
if(elp_debug >=3)
printk("%s: %d receive PCBs active\n", dev->name, adapter->rx_active);

/*
 * device is now officially open!
 */

netif_start_queue(dev);
return0;
}


/******************************************************
 *
 * send a packet to the adapter
 *
 ******************************************************/

static intsend_packet(struct net_device *dev,struct sk_buff *skb)
{
 elp_device *adapter = dev->priv;
unsigned long target;
unsigned long flags;

/*
 * make sure the length is even and no shorter than 60 bytes
 */
unsigned int nlen = (((skb->len <60) ?60: skb->len) +1) & (~1);

if(test_and_set_bit(0, (void*) &adapter->busy)) {
if(elp_debug >=2)
printk("%s: transmit blocked\n", dev->name);
return FALSE;
}

 adapter->stats.tx_bytes += nlen;

/*
 * 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)) {
 adapter->busy =0;
return FALSE;
}
/* if this happens, we die */
if(test_and_set_bit(0, (void*) &adapter->dmaing))
printk("%s: tx: DMA %d in progress\n", dev->name, adapter->current_dma.direction);

 adapter->current_dma.direction =1;
 adapter->current_dma.start_time = jiffies;

 target =virt_to_bus(skb->data);
if((target + nlen) >= MAX_DMA_ADDRESS) {
memcpy(adapter->dma_buffer, skb->data, nlen);
 target =virt_to_bus(adapter->dma_buffer);
}
 adapter->current_dma.skb = skb;

 flags=claim_dma_lock();
disable_dma(dev->dma);
clear_dma_ff(dev->dma);
set_dma_mode(dev->dma,0x48);/* dma memory -> io */
set_dma_addr(dev->dma, target);
set_dma_count(dev->dma, nlen);
outb_control(adapter->hcr_val | DMAE | TCEN, dev);
enable_dma(dev->dma);
release_dma_lock(flags);

if(elp_debug >=3)
printk("%s: DMA transfer started\n", dev->name);

return TRUE;
}

/*
 * The upper layer thinks we timed out
 */

static voidelp_timeout(struct net_device *dev)
{
 elp_device *adapter = dev->priv;
int stat;

 stat =inb_status(dev->base_addr);
printk(KERN_WARNING "%s: transmit timed out, lost %s?\n", dev->name, (stat & ACRF) ?"interrupt":"command");
if(elp_debug >=1)
printk("%s: status %#02x\n", dev->name, stat);
 dev->trans_start = jiffies;
 adapter->stats.tx_dropped++;
netif_wake_queue(dev);
}

/******************************************************
 *
 * start the transmitter
 * return 0 if sent OK, else return 1
 *
 ******************************************************/

static intelp_start_xmit(struct sk_buff *skb,struct net_device *dev)
{
unsigned long flags;
 elp_device *adapter = dev->priv;

spin_lock_irqsave(&adapter->lock, flags);
check_3c505_dma(dev);

if(elp_debug >=3)
printk("%s: request to send packet of length %d\n", dev->name, (int) skb->len);

netif_stop_queue(dev);

/*
 * send the packet at skb->data for skb->len
 */
if(!send_packet(dev, skb)) {
if(elp_debug >=2) {
printk("%s: failed to transmit packet\n", dev->name);
}
spin_unlock_irqrestore(&adapter->lock, flags);
return1;
}
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;

prime_rx(dev);
spin_unlock_irqrestore(&adapter->lock, flags);
netif_start_queue(dev);
return0;
}

/******************************************************
 *
 * return statistics on the board
 *
 ******************************************************/

static struct net_device_stats *elp_get_stats(struct net_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(!netif_running(dev))
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&&time_before(jiffies, timeout));
if(time_after_eq(jiffies, timeout)) {
TIMEOUT_MSG(__LINE__);
return&adapter->stats;
}
}

/* statistics are now up to date */
return&adapter->stats;
}

/******************************************************
 *
 * close the board
 *
 ******************************************************/

static intelp_close(struct net_device *dev)
{
 elp_device *adapter;

 adapter = dev->priv;

if(elp_debug >=3)
printk("%s: request to close device\n", dev->name);

netif_stop_queue(dev);

/* 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(0, dev);

/*
 * release the IRQ
 */
free_irq(dev->irq, dev);

free_dma(dev->dma);
free_pages((unsigned long) adapter->dma_buffer,get_order(DMA_BUFFER_SIZE));

return0;
}


/************************************************************
 *
 * Set multicast list
 * num_addrs==0: clear mc_list
 * num_addrs==-1: set promiscuous mode
 * num_addrs>0: set mc_list
 *
 ************************************************************/

static voidelp_set_mc_list(struct net_device *dev)
{
 elp_device *adapter = (elp_device *) dev->priv;
struct dev_mc_list *dmi = dev->mc_list;
int i;
unsigned long flags;

if(elp_debug >=3)
printk("%s: request to set multicast list\n", dev->name);

spin_lock_irqsave(&adapter->lock, flags);

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&&time_before(jiffies, timeout));
if(time_after_eq(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))
{
spin_unlock_irqrestore(&adapter->lock, flags);
printk("%s: couldn't send 82586 configure command\n", dev->name);
}
else{
int timeout = jiffies + TIMEOUT;
spin_unlock_irqrestore(&adapter->lock, flags);
while(adapter->got[CMD_CONFIGURE_82586] ==0&&time_before(jiffies, timeout));
if(time_after_eq(jiffies, timeout))
TIMEOUT_MSG(__LINE__);
}
}

/******************************************************
 *
 * initialise Etherlink Plus board
 *
 ******************************************************/

staticinlinevoidelp_init(struct net_device *dev)
{
 elp_device *adapter = dev->priv;

/*
 * 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->tx_timeout = elp_timeout;/* local */
 dev->watchdog_timeo =10*HZ;
 dev->set_multicast_list = elp_set_mc_list;/* local */

/* Setup the generic properties */
ether_setup(dev);

/*
 * setup ptr to adapter specific information
 */
memset(&(adapter->stats),0,sizeof(struct net_device_stats));

/*
 * 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 __init elp_sense(struct net_device *dev)
{
int timeout;
int addr = dev->base_addr;
const char*name = dev->name;
long flags;
 byte orig_HSR;

if(!request_region(addr, ELP_IO_EXTENT,"3c505"))
return-ENODEV;

 orig_HSR =inb_status(addr);

if(elp_debug >0)
printk(search_msg, name, addr);

if(orig_HSR ==0xff) {
if(elp_debug >0)
printk(notfound_msg,1);
goto out;
}
/* 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);

if(orig_HSR &DIR) {
/* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */
outb(0, dev->base_addr + PORT_CONTROL);
 timeout = jiffies +30*HZ/100;
while(time_before(jiffies, timeout));
restore_flags(flags);
if(inb_status(addr) &DIR) {
if(elp_debug >0)
printk(notfound_msg,2);
goto out;
}
}else{
/* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */
outb(DIR, dev->base_addr + PORT_CONTROL);
 timeout = jiffies +30*HZ/100;
while(time_before(jiffies, timeout));
restore_flags(flags);
if(!(inb_status(addr) &DIR)) {
if(elp_debug >0)
printk(notfound_msg,3);
goto out;
}
}
/*
 * It certainly looks like a 3c505.
 */
if(elp_debug >0)
printk(found_msg);

return0;
out:
release_region(addr, ELP_IO_EXTENT);
return-ENODEV;
}

/*************************************************************
 *
 * Search through addr_list[] and try to find a 3C505
 * Called only by eplus_probe
 *************************************************************/

static int __init elp_autodetect(struct net_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);

return0;/* Because of this, the layer above will return -ENODEV */
}


/******************************************************
 *
 * probe for an Etherlink Plus board at the specified address
 *
 ******************************************************/

/* There are three situations we need to be able to detect here:

 * a) the card is idle
 * b) the card is still booting up
 * c) the card is stuck in a strange state (some DOS drivers do this)
 *
 * In case (a), all is well. In case (b), we wait 10 seconds to see if the
 * card finishes booting, and carry on if so. In case (c), we do a hard reset,
 * loop round, and hope for the best.
 *
 * This is all very unpleasant, but hopefully avoids the problems with the old
 * probe code (which had a 15-second delay if the card was idle, and didn't
 * work at all if it was in a weird state).
 */

int __init elplus_probe(struct net_device *dev)
{
 elp_device *adapter;
int i, tries, tries1, timeout, okay;
unsigned long cookie =0;

SET_MODULE_OWNER(dev);

/*
 * setup adapter structure
 */

 dev->base_addr =elp_autodetect(dev);
if(!(dev->base_addr))
return-ENODEV;

/*
 * setup ptr to adapter specific information
 */
 adapter = (elp_device *) (dev->priv =kmalloc(sizeof(elp_device), GFP_KERNEL));
if(adapter == NULL) {
printk("%s: out of memory\n", dev->name);
return-ENODEV;
}

 adapter->send_pcb_semaphore =0;

for(tries1 =0; tries1 <3; tries1++) {
outb_control((adapter->hcr_val | CMDE) & ~DIR, dev);
/* First try to write just one byte, to see if the card is
 * responding at all normally.
 */
 timeout = jiffies +5*HZ/100;
 okay =0;
while(time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
if((inb_status(dev->base_addr) & HCRE)) {
outb_command(0, dev->base_addr);/* send a spurious byte */
 timeout = jiffies +5*HZ/100;
while(time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
if(inb_status(dev->base_addr) & HCRE)
 okay =1;
}
if(!okay) {
/* Nope, it's ignoring the command register. This means that
 * either it's still booting up, or it's died.
 */
printk("%s: command register wouldn't drain, ", dev->name);
if((inb_status(dev->base_addr) &7) ==3) {
/* If the adapter status is 3, it *could* still be booting.
 * Give it the benefit of the doubt for 10 seconds.
 */
printk("assuming 3c505 still starting\n");
 timeout = jiffies +10*HZ;
while(time_before(jiffies, timeout) && (inb_status(dev->base_addr) &7));
if(inb_status(dev->base_addr) &7) {
printk("%s: 3c505 failed to start\n", dev->name);
}else{
 okay =1;/* It started */
}
}else{
/* Otherwise, it must just be in a strange
 * state. We probably need to kick it.
 */
printk("3c505 is sulking\n");
}
}
for(tries =0; tries <5&& okay; tries++) {

/*
 * Try to set the Ethernet address, to make sure that the board
 * is working.
 */
 adapter->tx_pcb.command = CMD_STATION_ADDRESS;
 adapter->tx_pcb.length =0;
 cookie =probe_irq_on();
if(!send_pcb(dev, &adapter->tx_pcb)) {
printk("%s: could not send first PCB\n", dev->name);
probe_irq_off(cookie);
continue;
}
if(!receive_pcb(dev, &adapter->rx_pcb)) {
printk("%s: could not read first PCB\n", dev->name);
probe_irq_off(cookie);
continue;
}
if((adapter->rx_pcb.command != CMD_ADDRESS_RESPONSE) ||
(adapter->rx_pcb.length !=6)) {
printk("%s: first PCB wrong (%d, %d)\n", dev->name, adapter->rx_pcb.command, adapter->rx_pcb.length);
probe_irq_off(cookie);
continue;
}
goto okay;
}
/* It's broken. Do a hard reset to re-initialise the board,
 * and try again.
 */
printk(KERN_INFO "%s: resetting adapter\n", dev->name);
outb_control(adapter->hcr_val | FLSH | ATTN, dev);
outb_control(adapter->hcr_val & ~(FLSH | ATTN), dev);
}
printk("%s: failed to initialise 3c505\n", dev->name);
release_region(dev->base_addr, ELP_IO_EXTENT);
return-ENODEV;

 okay:
if(dev->irq) {/* Is there a preset IRQ? */
int rpt =probe_irq_off(cookie);
if(dev->irq != rpt) {
printk("%s: warning, irq %d configured but %d detected\n", dev->name, dev->irq, rpt);
}
/* if dev->irq == probe_irq_off(cookie), all is well */
}else/* No preset IRQ; just use what we can detect */
 dev->irq =probe_irq_off(cookie);
switch(dev->irq) {/* Legal, sane? */
case0:
printk("%s: IRQ probe failed: check 3c505 jumpers.\n",
 dev->name);
return-ENODEV;
case1:
case6:
case8:
case13:
printk("%s: Impossible IRQ %d reported by probe_irq_off().\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(adapter->hcr_val & ~CMDE, dev);

/*
 * copy Ethernet address into structure
 */
for(i =0; i <6; i++)
 dev->dev_addr[i] = adapter->rx_pcb.data.eth_addr[i];

/* find a DMA channel */
if(!dev->dma) {
if(dev->mem_start) {
 dev->dma = dev->mem_start &7;
}
else{
printk(KERN_WARNING "%s: warning, DMA channel not specified, using default\n", dev->name);
 dev->dma = ELP_DMA;
}
}

/*
 * print remainder of startup message
 */
printk("%s: 3c505 at %#lx, irq %d, dma %d, ",
 dev->name, dev->base_addr, dev->irq, dev->dma);
printk("addr %02x:%02x:%02x:%02x:%02x:%02x, ",
 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);

/*
 * read more information from the adapter
 */

 adapter->tx_pcb.command = CMD_ADAPTER_INFO;
 adapter->tx_pcb.length =0;
if(!send_pcb(dev, &adapter->tx_pcb) ||
!receive_pcb(dev, &adapter->rx_pcb) ||
(adapter->rx_pcb.command != CMD_ADAPTER_INFO_RESPONSE) ||
(adapter->rx_pcb.length !=10)) {
printk("not responding to second PCB\n");
}
printk("rev %d.%d, %dk\n", adapter->rx_pcb.data.info.major_vers, adapter->rx_pcb.data.info.minor_vers, adapter->rx_pcb.data.info.RAM_sz);

/*
 * reconfigure the adapter memory to better suit our purposes
 */
 adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
 adapter->tx_pcb.length =12;
 adapter->tx_pcb.data.memconf.cmd_q =8;
 adapter->tx_pcb.data.memconf.rcv_q =8;
 adapter->tx_pcb.data.memconf.mcast =10;
 adapter->tx_pcb.data.memconf.frame =10;
 adapter->tx_pcb.data.memconf.rcv_b =10;
 adapter->tx_pcb.data.memconf.progs =0;
if(!send_pcb(dev, &adapter->tx_pcb) ||
!receive_pcb(dev, &adapter->rx_pcb) ||
(adapter->rx_pcb.command != CMD_CONFIGURE_ADAPTER_RESPONSE) ||
(adapter->rx_pcb.length !=2)) {
printk("%s: could not configure adapter memory\n", dev->name);
}
if(adapter->rx_pcb.data.configure) {
printk("%s: adapter configuration failed\n", dev->name);
}

/*
 * initialise the device
 */
elp_init(dev);

return0;
}

#ifdef MODULE
static struct net_device dev_3c505[ELP_MAX_CARDS];
static int io[ELP_MAX_CARDS];
static int irq[ELP_MAX_CARDS];
static int dma[ELP_MAX_CARDS];
MODULE_PARM(io,"1-"__MODULE_STRING(ELP_MAX_CARDS)"i");
MODULE_PARM(irq,"1-"__MODULE_STRING(ELP_MAX_CARDS)"i");
MODULE_PARM(dma,"1-"__MODULE_STRING(ELP_MAX_CARDS)"i");

intinit_module(void)
{
int this_dev, found =0;

for(this_dev =0; this_dev < ELP_MAX_CARDS; this_dev++) {
struct net_device *dev = &dev_3c505[this_dev];
 dev->irq = irq[this_dev];
 dev->base_addr = io[this_dev];
 dev->init = elplus_probe;
if(dma[this_dev]) {
 dev->dma = dma[this_dev];
}else{
 dev->dma = ELP_DMA;
printk(KERN_WARNING "3c505.c: warning, using default DMA channel,\n");
}
if(io[this_dev] ==0) {
if(this_dev)break;
printk(KERN_NOTICE "3c505.c: module autoprobe not recommended, give io=xx.\n");
}
if(register_netdev(dev) !=0) {
printk(KERN_WARNING "3c505.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 < ELP_MAX_CARDS; this_dev++) {
struct net_device *dev = &dev_3c505[this_dev];
if(dev->priv != NULL) {
unregister_netdev(dev);
kfree(dev->priv);
 dev->priv = NULL;
release_region(dev->base_addr, ELP_IO_EXTENT);
}
}
}

#endif/* MODULE */