text: /*
   *  Copyright (C) 1997 Cullen Jennings
   *  Copyright (C) 1998 Elmer Joandiu, elmer@ylenurme.ee
   *  Gnu Public License applies
   * This module provides support for the Arlan 655 card made by Aironet
   */
  
  #include <linux/config.h>
  #include "arlan.h"
  
  static const char *arlan_version = "C.Jennigs 97 & Elmer.Joandi@ut.ee  Oct'98, http://www.ylenurme.ee/~elmer/655/";
  
  struct net_device *arlan_device[MAX_ARLANS];
  int last_arlan;
  
  static int SID = SIDUNKNOWN;
  static int radioNodeId = radioNodeIdUNKNOWN;
  static char encryptionKey[12] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'};
  static char *siteName = siteNameUNKNOWN;
  static int mem = memUNKNOWN;
  int arlan_debug = debugUNKNOWN;
  static int probe = probeUNKNOWN;
  static int numDevices = numDevicesUNKNOWN;
  static int spreadingCode = spreadingCodeUNKNOWN;
  static int channelNumber = channelNumberUNKNOWN;
  static int channelSet = channelSetUNKNOWN;
  static int systemId = systemIdUNKNOWN;
  static int registrationMode = registrationModeUNKNOWN;
  static int keyStart;
  static int tx_delay_ms;
  static int retries = 5;
  static int async = 1;
  static int tx_queue_len = 1;
  static int arlan_EEPROM_bad;
  int arlan_entry_and_exit_debug;
  
  #ifdef ARLAN_DEBUGING
  
  static int arlan_entry_debug;
  static int arlan_exit_debug;
  static int testMemory = testMemoryUNKNOWN;
  static int irq = irqUNKNOWN;
  static int txScrambled = 1;
  static int mdebug;
  #endif
  
  #if LINUX_VERSION_CODE > 0x20100
  MODULE_PARM(irq, "i");
  MODULE_PARM(mem, "i");
  MODULE_PARM(probe, "i");
  MODULE_PARM(arlan_debug, "i");
  MODULE_PARM(numDevices, "i");
  MODULE_PARM(testMemory, "i");
  MODULE_PARM(spreadingCode, "i");
  MODULE_PARM(channelNumber, "i");
  MODULE_PARM(channelSet, "i");
  MODULE_PARM(systemId, "i");
  MODULE_PARM(registrationMode, "i");
  MODULE_PARM(radioNodeId, "i");
  MODULE_PARM(SID, "i");
  MODULE_PARM(txScrambled, "i");
  MODULE_PARM(keyStart, "i");
  MODULE_PARM(mdebug, "i");
  MODULE_PARM(tx_delay_ms, "i");
  MODULE_PARM(retries, "i");
  MODULE_PARM(async, "i");
  MODULE_PARM(tx_queue_len, "i");
  MODULE_PARM(arlan_entry_debug, "i");
  MODULE_PARM(arlan_exit_debug, "i");
  MODULE_PARM(arlan_entry_and_exit_debug, "i");
  MODULE_PARM(arlan_EEPROM_bad, "i");
  
  EXPORT_SYMBOL(arlan_device);
  EXPORT_SYMBOL(last_arlan);
  
  
  //        #warning kernel 2.1.110 tested
  #define myATOMIC_INIT(a,b) atomic_set(&(a),b)
  
  #else
  #define test_and_set_bit	set_bit
  #if LINUX_VERSION_CODE != 0x20024
   //        #warning kernel  2.0.36  tested
  #endif
  #define myATOMIC_INIT(a,b) a = b;
  
  #endif
  
  struct arlan_conf_stru arlan_conf[MAX_ARLANS];
  int arlans_found;
  
  static  int 	arlan_probe_here(struct net_device *dev, int ioaddr);
  static  int 	arlan_open(struct net_device *dev);
  static  int 	arlan_tx(struct sk_buff *skb, struct net_device *dev);
  static  void 	arlan_interrupt(int irq, void *dev_id, struct pt_regs *regs);
  static  int 	arlan_close(struct net_device *dev);
  static  struct net_device_stats *
  		arlan_statistics		(struct net_device *dev);
  static  void 	arlan_set_multicast		(struct net_device *dev);
  static  int 	arlan_hw_tx			(struct net_device* dev, char *buf, int length );
  static  int	arlan_hw_config			(struct net_device * dev);
  static  void 	arlan_tx_done_interrupt		(struct net_device * dev, int status);
  static  void	arlan_rx_interrupt		(struct net_device * dev, u_char rxStatus, u_short, u_short);
  static  void	arlan_process_interrupt		(struct net_device * dev);
  static	void	arlan_tx_timeout		(struct net_device *dev);
  int	arlan_command(struct net_device * dev, int command);
  
  EXPORT_SYMBOL(arlan_command);
  
  extern inline long long arlan_time(void)
  {
  	struct timeval timev;
  	do_gettimeofday(&timev);
  	return ((long long) timev.tv_sec * 1000000 + timev.tv_usec);
  };
  
  #ifdef ARLAN_ENTRY_EXIT_DEBUGING
  #define ARLAN_DEBUG_ENTRY(name) \
  	{\
  	struct timeval timev;\
  	do_gettimeofday(&timev);\
  		if (arlan_entry_debug || arlan_entry_and_exit_debug)\
  			printk("--->>>" name " %ld " "\n",((long int) timev.tv_sec * 1000000 + timev.tv_usec));\
  	}
  #define ARLAN_DEBUG_EXIT(name) \
  	{\
  	struct timeval timev;\
  	do_gettimeofday(&timev);\
  		if (arlan_exit_debug || arlan_entry_and_exit_debug)\
  			printk("<<<---" name " %ld " "\n",((long int) timev.tv_sec * 1000000 + timev.tv_usec) );\
  	}
  #else
  #define ARLAN_DEBUG_ENTRY(name)
  #define ARLAN_DEBUG_EXIT(name)
  #endif
  
  
  #define arlan_interrupt_ack(dev)\
          clearClearInterrupt(dev);\
          setClearInterrupt(dev);
  
  
  #define ARLAN_COMMAND_LOCK(dev) \
  	if (atomic_dec_and_test(&((struct arlan_private * )dev->priv)->card_users))\
     		arlan_wait_command_complete_short(dev,__LINE__);
  #define ARLAN_COMMAND_UNLOCK(dev) \
  	atomic_inc(&((struct arlan_private * )dev->priv)->card_users);
  
  
  #define ARLAN_COMMAND_INC(dev) \
   	{((struct arlan_private *) dev->priv)->under_command++;}
  #define ARLAN_COMMAND_ZERO(dev) \
   	{((struct arlan_private *) dev->priv)->under_command =0;}
  #define ARLAN_UNDER_COMMAND(dev)\
  	(((struct arlan_private *) dev->priv)->under_command)
  
  #define ARLAN_COMMAND_START(dev) ARLAN_COMMAND_INC(dev)
  #define ARLAN_COMMAND_END(dev) ARLAN_COMMAND_ZERO(dev)
  #define ARLAN_TOGGLE_START(dev)\
   	{((struct arlan_private *) dev->priv)->under_toggle++;}
  #define ARLAN_TOGGLE_END(dev)\
   	{((struct arlan_private *) dev->priv)->under_toggle=0;}
  #define ARLAN_UNDER_TOGGLE(dev)\
   	(((struct arlan_private *) dev->priv)->under_toggle)
  
  
  
  extern inline int arlan_drop_tx(struct net_device *dev)
  {
  	struct arlan_private *priv = ((struct arlan_private *) dev->priv);
  
  	priv->stats.tx_errors++;
  	if (priv->Conf->tx_delay_ms)
  	{
  		priv->tx_done_delayed = jiffies + priv->Conf->tx_delay_ms * HZ / 1000 + 1;
  	}
  	else
  	{
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_TX;
  		TXHEAD(dev).offset = 0;
  		TXTAIL(dev).offset = 0;
  		priv->txLast = 0;
  		priv->txOffset = 0;
  		priv->bad = 0;
  		if (!priv->under_reset && !priv->under_config)
  			netif_wake_queue (dev);
  	}
  	return 1;
  };
  
  
  int arlan_command(struct net_device *dev, int command_p)
  {
  
  	volatile struct arlan_shmem *arlan = ((struct arlan_private *) dev->priv)->card;
  	struct arlan_conf_stru *conf = ((struct arlan_private *) dev->priv)->Conf;
  	struct arlan_private *priv = (struct arlan_private *) dev->priv;
  	int udelayed = 0;
  	int i = 0;
  	long long time_mks = arlan_time();
  
  	ARLAN_DEBUG_ENTRY("arlan_command");
  
  	if (priv->card_polling_interval)
  		priv->card_polling_interval = 1;
  
  	if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS)
  		printk(KERN_DEBUG "arlan_command, %lx lock %lx  commandByte %x waiting %x incoming %x \n",
  		jiffies, priv->command_lock, READSHMB(arlan->commandByte),
  		       priv->waiting_command_mask, command_p);
  
  	priv->waiting_command_mask |= command_p;
  
  	if (priv->waiting_command_mask & ARLAN_COMMAND_RESET)
  		if (jiffies - priv->lastReset < 5 * HZ)
  			priv->waiting_command_mask &= ~ARLAN_COMMAND_RESET;
  
  	if (priv->waiting_command_mask & ARLAN_COMMAND_INT_ACK)
  	{
  		arlan_interrupt_ack(dev);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_ACK;
  	}
  	if (priv->waiting_command_mask & ARLAN_COMMAND_INT_ENABLE)
  	{
  		setInterruptEnable(dev);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_ENABLE;
  	}
  
  	/* Card access serializing lock */
  
  	if (test_and_set_bit(0, (void *) &priv->command_lock))
  	{
  		if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS)
  			printk(KERN_DEBUG "arlan_command: entered when command locked \n");
  		goto command_busy_end;
  	}
  	/* Check cards status and waiting */
  
  	if (priv->waiting_command_mask & (ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW))
  	{
  		while (priv->waiting_command_mask & (ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW))
  		{
  			if (READSHMB(arlan->resetFlag) ||
  				READSHMB(arlan->commandByte))	/* || 
  								   (readControlRegister(dev) & ARLAN_ACCESS))
  								 */
  				udelay(40);
  			else
  				priv->waiting_command_mask &= ~(ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW);
  
  			udelayed++;
  
  			if (priv->waiting_command_mask & ARLAN_COMMAND_LONG_WAIT_NOW)
  			{
  				if (udelayed * 40 > 1000000)
  				{
  					printk(KERN_ERR "%s long wait too long \n", dev->name);
  					priv->waiting_command_mask |= ARLAN_COMMAND_RESET;
  					break;
  				}
  			}
  			else if (priv->waiting_command_mask & ARLAN_COMMAND_WAIT_NOW)
  			{
  				if (udelayed * 40 > 1000)
  				{
  					printk(KERN_ERR "%s short wait too long \n", dev->name);
  					goto bad_end;
  				}
  			}
  		}
  	}
  	else
  	{
  		i = 0;
  		while ((READSHMB(arlan->resetFlag) ||
  			READSHMB(arlan->commandByte)) &&
  			conf->pre_Command_Wait > (i++) * 10)
  			udelay(10);
  
  
  		if ((READSHMB(arlan->resetFlag) ||
  			READSHMB(arlan->commandByte)) &&
  			!(priv->waiting_command_mask & ARLAN_COMMAND_RESET))
  		{
  			goto card_busy_end;
  		}
  	}
  	if (priv->waiting_command_mask & ARLAN_COMMAND_RESET)
  		priv->under_reset = 1;
  	if (priv->waiting_command_mask & ARLAN_COMMAND_CONF)
  		priv->under_config = 1;
  
  	/* Issuing command */
  	arlan_lock_card_access(dev);
  	if (priv->waiting_command_mask & ARLAN_COMMAND_POWERUP)
  	{
  	//     if (readControlRegister(dev) & (ARLAN_ACCESS && ARLAN_POWER))
  		setPowerOn(dev);
  		arlan_interrupt_lancpu(dev);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_POWERUP;
  		priv->waiting_command_mask |= ARLAN_COMMAND_RESET;
  		priv->card_polling_interval = HZ / 10;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_ACTIVATE)
  	{
  		WRITESHMB(arlan->commandByte, ARLAN_COM_ACTIVATE);
  		arlan_interrupt_lancpu(dev);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_ACTIVATE;
  		priv->card_polling_interval = HZ / 10;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_RX_ABORT)
  	{
  		if (priv->rx_command_given)
  		{
  			WRITESHMB(arlan->commandByte, ARLAN_COM_RX_ABORT);
  			arlan_interrupt_lancpu(dev);
  			priv->rx_command_given = 0;
  		}
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_RX_ABORT;
  		priv->card_polling_interval = 1;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_TX_ABORT)
  	{
  		if (priv->tx_command_given)
  		{
  			WRITESHMB(arlan->commandByte, ARLAN_COM_TX_ABORT);
  			arlan_interrupt_lancpu(dev);
  			priv->tx_command_given = 0;
  		}
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_TX_ABORT;
  		priv->card_polling_interval = 1;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_RESET)
  	{
  		priv->under_reset=1;
  		netif_stop_queue (dev);
  
  		arlan_drop_tx(dev);
  		if (priv->tx_command_given || priv->rx_command_given)
  		{
  			printk(KERN_ERR "%s: Reset under tx or rx command \n", dev->name);
  		};
  		netif_stop_queue (dev);
  		if (arlan_debug & ARLAN_DEBUG_RESET)
  			printk(KERN_ERR "%s: Doing chip reset\n", dev->name);
  		priv->lastReset = jiffies;
  		WRITESHM(arlan->commandByte, 0, u_char);
  		/* hold card in reset state */
  		setHardwareReset(dev);
  		/* set reset flag and then release reset */
  		WRITESHM(arlan->resetFlag, 0xff, u_char);
  		clearChannelAttention(dev);
  		clearHardwareReset(dev);
  		priv->numResets++;
  		priv->card_polling_interval = HZ / 4;
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_RESET;
  		priv->waiting_command_mask |= ARLAN_COMMAND_INT_RACK;
  //		priv->waiting_command_mask |= ARLAN_COMMAND_INT_RENABLE; 
  //		priv->waiting_command_mask |= ARLAN_COMMAND_RX;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_INT_RACK)
  	{
  		clearHardwareReset(dev);
  		clearClearInterrupt(dev);
  		setClearInterrupt(dev);
  		setInterruptEnable(dev);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_RACK;
  		priv->waiting_command_mask |= ARLAN_COMMAND_CONF;
  		priv->under_config = 1;
  		priv->under_reset = 0;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_INT_RENABLE)
  	{
  		setInterruptEnable(dev);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_RENABLE;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_CONF)
  	{
  		if (priv->tx_command_given || priv->rx_command_given)
  		{
  			printk(KERN_ERR "%s: Reset under tx or rx command \n", dev->name);
  		}
  		arlan_drop_tx(dev);
  		setInterruptEnable(dev);
  		arlan_hw_config(dev);
  		arlan_interrupt_lancpu(dev);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_CONF;
  		priv->card_polling_interval = HZ / 10;
  //		priv->waiting_command_mask |= ARLAN_COMMAND_INT_RACK;   
  //		priv->waiting_command_mask |= ARLAN_COMMAND_INT_ENABLE; 
  		priv->waiting_command_mask |= ARLAN_COMMAND_CONF_WAIT;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_CONF_WAIT)
  	{
  		if (READSHMB(arlan->configuredStatusFlag) != 0 &&
  			READSHMB(arlan->diagnosticInfo) == 0xff)
  		{
  			priv->waiting_command_mask &= ~ARLAN_COMMAND_CONF_WAIT;
  			priv->waiting_command_mask |= ARLAN_COMMAND_RX;
  			priv->waiting_command_mask |= ARLAN_COMMAND_TBUSY_CLEAR;
  			priv->card_polling_interval = HZ / 10;
  			priv->tx_command_given = 0;
  			priv->under_config = 0;
  		}
  		else
  		{
  			priv->card_polling_interval = 1;
  			if (arlan_debug & ARLAN_DEBUG_TIMING)
  				printk(KERN_ERR "configure delayed \n");
  		}
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_RX)
  	{
  		if (!registrationBad(dev))
  		{
  			setInterruptEnable(dev);
  			memset_io((void *) arlan->commandParameter, 0, 0xf);
  			WRITESHMB(arlan->commandByte, ARLAN_COM_INT | ARLAN_COM_RX_ENABLE);
  			WRITESHMB(arlan->commandParameter[0], conf->rxParameter);
  			arlan_interrupt_lancpu(dev);
  			priv->rx_command_given = 0; // mnjah, bad
  			priv->last_rx_time = arlan_time();
  			priv->waiting_command_mask &= ~ARLAN_COMMAND_RX;
  			priv->card_polling_interval = 1;
  		}
  		else
  			priv->card_polling_interval = 2;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_TBUSY_CLEAR)
  	{
  		if ( !registrationBad(dev) &&
  		     (netif_queue_stopped(dev) || !netif_running(dev)) )
  			{
  				priv->waiting_command_mask &= ~ARLAN_COMMAND_TBUSY_CLEAR;
  				netif_wake_queue (dev);
  			};
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_TX)
  	{
  		if (!test_and_set_bit(0, (void *) &priv->tx_command_given))
  		{
  			if ((time_mks - priv->last_tx_time > conf->rx_tweak1) ||
  				(time_mks - priv->last_rx_int_ack_time < conf->rx_tweak2))
  			{
  				setInterruptEnable(dev);
  				memset_io((void *) arlan->commandParameter, 0, 0xf);
  				WRITESHMB(arlan->commandByte, ARLAN_COM_TX_ENABLE | ARLAN_COM_INT);
  				memcpy_toio((void *) arlan->commandParameter, &TXLAST(dev), 14);
  //				for ( i=1 ; i < 15 ; i++) printk("%02x:",READSHMB(arlan->commandParameter[i]));
  				priv->last_command_was_rx = 0;
  				priv->tx_last_sent = jiffies;
  				arlan_interrupt_lancpu(dev);
  				priv->last_tx_time = arlan_time();
  				priv->tx_command_given = 1;
  				priv->waiting_command_mask &= ~ARLAN_COMMAND_TX;
  				priv->card_polling_interval = 1;
  			}
  			else
  			{
  				priv->tx_command_given = 0;
  				priv->card_polling_interval = 1;
  			}
  		} 
  		else if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS)
  			printk(KERN_ERR "tx command when tx chain locked \n");
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_NOOPINT)
  	{
  		{
  			WRITESHMB(arlan->commandByte, ARLAN_COM_NOP | ARLAN_COM_INT);
  		}
  		arlan_interrupt_lancpu(dev);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_NOOPINT;
  		priv->card_polling_interval = HZ / 3;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_NOOP)
  	{
  		WRITESHMB(arlan->commandByte, ARLAN_COM_NOP);
  		arlan_interrupt_lancpu(dev);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_NOOP;
  		priv->card_polling_interval = HZ / 3;
  	}
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_SLOW_POLL)
  	{
  		WRITESHMB(arlan->commandByte, ARLAN_COM_GOTO_SLOW_POLL);
  		arlan_interrupt_lancpu(dev);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_SLOW_POLL;
  		priv->card_polling_interval = HZ / 3;
  	} 
  	else if (priv->waiting_command_mask & ARLAN_COMMAND_POWERDOWN)
  	{
  		setPowerOff(dev);
  		if (arlan_debug & ARLAN_DEBUG_CARD_STATE)
  			printk(KERN_WARNING "%s: Arlan Going Standby\n", dev->name);
  		priv->waiting_command_mask &= ~ARLAN_COMMAND_POWERDOWN;
  		priv->card_polling_interval = 3 * HZ;
  	}
  	arlan_unlock_card_access(dev);
  	for (i = 0; READSHMB(arlan->commandByte) && i < 20; i++)
  		udelay(10);
  	if (READSHMB(arlan->commandByte))
  		if (arlan_debug & ARLAN_DEBUG_CARD_STATE)
  			printk(KERN_ERR "card busy leaving command %x \n", priv->waiting_command_mask);
  
  	priv->command_lock = 0;
  	ARLAN_DEBUG_EXIT("arlan_command");
  	priv->last_command_buff_free_time = jiffies;
  	return 0;
  
  card_busy_end:
  	if (jiffies - priv->last_command_buff_free_time > HZ)
  		priv->waiting_command_mask |= ARLAN_COMMAND_CLEAN_AND_RESET;
  
  	if (arlan_debug & ARLAN_DEBUG_CARD_STATE)
  		printk(KERN_ERR "%s arlan_command card busy end \n", dev->name);
  	priv->command_lock = 0;
  	ARLAN_DEBUG_EXIT("arlan_command");
  	return 1;
  
  bad_end:
  	printk(KERN_ERR "%s arlan_command bad end \n", dev->name);
  
  	priv->command_lock = 0;
  	ARLAN_DEBUG_EXIT("arlan_command");
  
  	return -1;
  
  command_busy_end:
  	if (arlan_debug & ARLAN_DEBUG_CARD_STATE)
  		printk(KERN_ERR "%s arlan_command command busy end \n", dev->name);
  	ARLAN_DEBUG_EXIT("arlan_command");
  	return 2;
  
  };
  
  extern inline void arlan_command_process(struct net_device *dev)
  {
  	struct arlan_private *priv = ((struct arlan_private *) dev->priv);
  
  	int times = 0;
  	while (priv->waiting_command_mask && times < 8)
  	{
  		if (priv->waiting_command_mask)
  		{
  			if (arlan_command(dev, 0))
  				break;
  			times++;
  		}
  		/* if long command, we wont repeat trying */ ;
  		if (priv->card_polling_interval > 1)
  			break;
  		times++;
  	}
  }
  
  
  extern inline void arlan_retransmit_now(struct net_device *dev)
  {
  	struct arlan_private *priv = ((struct arlan_private *) dev->priv);
  
  
  	ARLAN_DEBUG_ENTRY("arlan_retransmit_now");
  	if (TXLAST(dev).offset == 0)
  	{
  		if (TXHEAD(dev).offset)
  		{
  			priv->txLast = 0;
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_DEBUG "TX buff switch to head \n");
  
  		}
  		else if (TXTAIL(dev).offset)
  		{
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_DEBUG "TX buff switch to tail \n");
  			priv->txLast = 1;
  		}
  		else
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_ERR "ReTransmit buff empty");
  		priv->txOffset = 0;
  		netif_wake_queue (dev);
  		return;
  
  	}
  	arlan_command(dev, ARLAN_COMMAND_TX);
  
  	priv->nof_tx++;
  
  	priv->Conf->driverRetransmissions++;
  	priv->retransmissions++;
  
  	IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk("Retransmit %d bytes \n", TXLAST(dev).length);
  
  	ARLAN_DEBUG_EXIT("arlan_retransmit_now");
  }
  
  
  
  static void arlan_registration_timer(unsigned long data)
  {
  	struct net_device *dev = (struct net_device *) data;
  	struct arlan_private *priv = (struct arlan_private *) dev->priv;
  
  	int lostTime = ((int) (jiffies - priv->registrationLastSeen)) * 1000 / HZ;
  	int bh_mark_needed = 0;
  	int next_tick = 1;
  
  
  	priv->timer_chain_active = 1;
  
  
  	if (registrationBad(dev))
  	{
  		//debug=100;
  		priv->registrationLostCount++;
  		if (lostTime > 7000 && lostTime < 7200)
  		{
  			printk(KERN_NOTICE "%s registration Lost \n", dev->name);
  		}
  		if (lostTime / priv->reRegisterExp > 2000)
  			arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_CONF);
  		if (lostTime / (priv->reRegisterExp) > 3500)
  			arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
  		if (priv->reRegisterExp < 400)
  			priv->reRegisterExp += 2;
  		if (lostTime > 7200)
  		{
  			next_tick = HZ;
  			arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
  		}
  	}
  	else
  	{
  		if (priv->Conf->registrationMode && lostTime > 10000 &&
  			priv->registrationLostCount)
  		{
  			printk(KERN_NOTICE "%s registration is back after %d milliseconds\n", dev->name,
  				((int) (jiffies - priv->registrationLastSeen) * 1000) / HZ);
  		}
  		priv->registrationLastSeen = jiffies;
  		priv->registrationLostCount = 0;
  		priv->reRegisterExp = 1;
  		if (!netif_running(dev) )
  			netif_wake_queue(dev);
  		if (priv->tx_last_sent > priv->tx_last_cleared &&
  			jiffies - priv->tx_last_sent > 5*HZ ){
  			arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);		
  			priv->tx_last_cleared = jiffies;
  		};
  	}
  
  
  	if (!registrationBad(dev) && priv->ReTransmitRequested)
  	{
  		IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  			printk(KERN_ERR "Retransmit from timer \n");
  		priv->ReTransmitRequested = 0;
  		arlan_retransmit_now(dev);
  	}
  	if (!registrationBad(dev) &&
  		priv->tx_done_delayed < jiffies &&
  		priv->tx_done_delayed != 0)
  	{
  		TXLAST(dev).offset = 0;
  		if (priv->txLast)
  			priv->txLast = 0;
  		else if (TXTAIL(dev).offset)
  			priv->txLast = 1;
  		if (TXLAST(dev).offset)
  		{
  			arlan_retransmit_now(dev);
  			dev->trans_start = jiffies;
  		}
  		if (!(TXHEAD(dev).offset && TXTAIL(dev).offset))
  		{
  			priv->txOffset = 0;
  			netif_wake_queue (dev);
  		}
  		priv->tx_done_delayed = 0;
  		bh_mark_needed = 1;
  	}
  	if (bh_mark_needed)
  	{
  		priv->txOffset = 0;
  		netif_wake_queue (dev);
  	}
  	arlan_process_interrupt(dev);
  
  	if (next_tick < priv->card_polling_interval)
  		next_tick = priv->card_polling_interval;
  
  	priv->timer_chain_active = 0;
  	priv->timer.expires = jiffies + next_tick;
  
  	add_timer(&priv->timer);
  }
  
  
  #ifdef ARLAN_DEBUGING
  
  static void arlan_print_registers(struct net_device *dev, int line)
  {
  	volatile struct arlan_shmem *arlan = ((struct arlan_private *) dev->priv)->card;
  
  	u_char hostcpuLock, lancpuLock, controlRegister, cntrlRegImage,
  		txStatus, rxStatus, interruptInProgress, commandByte;
  
  
  	ARLAN_DEBUG_ENTRY("arlan_print_registers");
  	READSHM(interruptInProgress, arlan->interruptInProgress, u_char);
  	READSHM(hostcpuLock, arlan->hostcpuLock, u_char);
  	READSHM(lancpuLock, arlan->lancpuLock, u_char);
  	READSHM(controlRegister, arlan->controlRegister, u_char);
  	READSHM(cntrlRegImage, arlan->cntrlRegImage, u_char);
  	READSHM(txStatus, arlan->txStatus, u_char);
  	READSHM(rxStatus, arlan->rxStatus, u_char);
  	READSHM(commandByte, arlan->commandByte, u_char);
  
  	printk(KERN_WARNING "line %04d IP %02x HL %02x LL %02x CB %02x CR %02x CRI %02x TX %02x RX %02x\n",
  		line, interruptInProgress, hostcpuLock, lancpuLock, commandByte,
  		controlRegister, cntrlRegImage, txStatus, rxStatus);
  
  	ARLAN_DEBUG_EXIT("arlan_print_registers");
  }
  #endif
  
  
  static int arlan_hw_tx(struct net_device *dev, char *buf, int length)
  {
  	int i;
  
  	struct arlan_private *priv = (struct arlan_private *) dev->priv;
  	volatile struct arlan_shmem *arlan = priv->card;
  	struct arlan_conf_stru *conf = priv->Conf;
  
  	int tailStarts = 0x800;
  	int headEnds = 0x0;
  
  
  	ARLAN_DEBUG_ENTRY("arlan_hw_tx");
  	if (TXHEAD(dev).offset)
  		headEnds = (((TXHEAD(dev).offset + TXHEAD(dev).length - (((int) arlan->txBuffer) - ((int) arlan))) / 64) + 1) * 64;
  	if (TXTAIL(dev).offset)
  		tailStarts = 0x800 - (((TXTAIL(dev).offset - (((int) arlan->txBuffer) - ((int) arlan))) / 64) + 2) * 64;
  
  
  	if (!TXHEAD(dev).offset && length < tailStarts)
  	{
  		IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  			printk(KERN_ERR "TXHEAD insert, tailStart %d\n", tailStarts);
  
  		TXHEAD(dev).offset =
  			(((int) arlan->txBuffer) - ((int) arlan));
  		TXHEAD(dev).length = length - ARLAN_FAKE_HDR_LEN;
  		for (i = 0; i < 6; i++)
  			TXHEAD(dev).dest[i] = buf[i];
  		TXHEAD(dev).clear = conf->txClear;
  		TXHEAD(dev).retries = conf->txRetries;	/* 0 is use default */
  		TXHEAD(dev).routing = conf->txRouting;
  		TXHEAD(dev).scrambled = conf->txScrambled;
  		memcpy_toio(((char *) arlan + TXHEAD(dev).offset), buf + ARLAN_FAKE_HDR_LEN, TXHEAD(dev).length);
  	}
  	else if (!TXTAIL(dev).offset && length < (0x800 - headEnds))
  	{
  		IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  			printk(KERN_ERR "TXTAIL insert, headEnd %d\n", headEnds);
  
  		TXTAIL(dev).offset =
  			(((int) arlan->txBuffer) - ((int) arlan)) + 0x800 - (length / 64 + 2) * 64;
  		TXTAIL(dev).length = length - ARLAN_FAKE_HDR_LEN;
  		for (i = 0; i < 6; i++)
  			TXTAIL(dev).dest[i] = buf[i];
  		TXTAIL(dev).clear = conf->txClear;
  		TXTAIL(dev).retries = conf->txRetries;
  		TXTAIL(dev).routing = conf->txRouting;
  		TXTAIL(dev).scrambled = conf->txScrambled;
  		memcpy_toio(((char *) arlan + TXTAIL(dev).offset), buf + ARLAN_FAKE_HDR_LEN, TXTAIL(dev).length);
  	}
  	else
  	{
  		netif_stop_queue (dev);
  		return -1;
  		IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  			printk(KERN_ERR "TX TAIL & HEAD full, return, tailStart %d headEnd %d\n", tailStarts, headEnds);
  	}
  	priv->out_bytes += length;
  	priv->out_bytes10 += length;
  	if (conf->measure_rate < 1)
  		conf->measure_rate = 1;
  	if (jiffies - priv->out_time > conf->measure_rate * HZ)
  	{
  		conf->out_speed = priv->out_bytes / conf->measure_rate;
  		priv->out_bytes = 0;
  		priv->out_time = jiffies;
  	}
  	if (jiffies - priv->out_time10 > conf->measure_rate * HZ * 10)
  	{
  		conf->out_speed10 = priv->out_bytes10 / (10 * conf->measure_rate);
  		priv->out_bytes10 = 0;
  		priv->out_time10 = jiffies;
  	}
  	if (TXHEAD(dev).offset && TXTAIL(dev).offset)
  	{
  		netif_stop_queue (dev);
  		return 0;
  	}
  	else
  		netif_start_queue (dev);
  
  
  	IFDEBUG(ARLAN_DEBUG_HEADER_DUMP)
  		printk(KERN_WARNING "%s Transmit t %2x:%2x:%2x:%2x:%2x:%2x f %2x:%2x:%2x:%2x:%2x:%2x \n", dev->name,
  		   (unsigned char) buf[0], (unsigned char) buf[1], (unsigned char) buf[2], (unsigned char) buf[3],
  		   (unsigned char) buf[4], (unsigned char) buf[5], (unsigned char) buf[6], (unsigned char) buf[7],
  		   (unsigned char) buf[8], (unsigned char) buf[9], (unsigned char) buf[10], (unsigned char) buf[11]);
  
  	IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_ERR "TX command prepare for buffer %d\n", priv->txLast);
  
  	arlan_command(dev, ARLAN_COMMAND_TX);
  
  	priv->last_command_was_rx = 0;
  	priv->tx_last_sent = jiffies;
  	priv->nof_tx++;
  
  	IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk("%s TX Qued %d bytes \n", dev->name, length);
  
  	ARLAN_DEBUG_EXIT("arlan_hw_tx");
  
  	return 0;
  }
  
  
  static int arlan_hw_config(struct net_device *dev)
  {
  	volatile struct arlan_shmem *arlan = ((struct arlan_private *) dev->priv)->card;
  	struct arlan_conf_stru *conf = ((struct arlan_private *) dev->priv)->Conf;
  	struct arlan_private *priv = (struct arlan_private *) dev->priv;
  
  	ARLAN_DEBUG_ENTRY("arlan_hw_config");
  
  	printk(KERN_NOTICE "%s arlan configure called \n", dev->name);
  	if (arlan_EEPROM_bad)
  		printk(KERN_NOTICE "arlan configure with eeprom bad option \n");
  
  
  	WRITESHM(arlan->spreadingCode, conf->spreadingCode, u_char);
  	WRITESHM(arlan->channelSet, conf->channelSet, u_char);
  
  	if (arlan_EEPROM_bad)
  		WRITESHM(arlan->defaultChannelSet, conf->channelSet, u_char);
  
  	WRITESHM(arlan->channelNumber, conf->channelNumber, u_char);
  
  	WRITESHM(arlan->scramblingDisable, conf->scramblingDisable, u_char);
  	WRITESHM(arlan->txAttenuation, conf->txAttenuation, u_char);
  
  	WRITESHM(arlan->systemId, conf->systemId, u_int);
  
  	WRITESHM(arlan->maxRetries, conf->maxRetries, u_char);
  	WRITESHM(arlan->receiveMode, conf->receiveMode, u_char);
  	WRITESHM(arlan->priority, conf->priority, u_char);
  	WRITESHM(arlan->rootOrRepeater, conf->rootOrRepeater, u_char);
  	WRITESHM(arlan->SID, conf->SID, u_int);
  
  	WRITESHM(arlan->registrationMode, conf->registrationMode, u_char);
  
  	WRITESHM(arlan->registrationFill, conf->registrationFill, u_char);
  	WRITESHM(arlan->localTalkAddress, conf->localTalkAddress, u_char);
  	WRITESHM(arlan->codeFormat, conf->codeFormat, u_char);
  	WRITESHM(arlan->numChannels, conf->numChannels, u_char);
  	WRITESHM(arlan->channel1, conf->channel1, u_char);
  	WRITESHM(arlan->channel2, conf->channel2, u_char);
  	WRITESHM(arlan->channel3, conf->channel3, u_char);
  	WRITESHM(arlan->channel4, conf->channel4, u_char);
  	WRITESHM(arlan->radioNodeId, conf->radioNodeId, u_short);
  	WRITESHM(arlan->SID, conf->SID, u_int);
  	WRITESHM(arlan->waitTime, conf->waitTime, u_short);
  	WRITESHM(arlan->lParameter, conf->lParameter, u_short);
  	memcpy_toio(&(arlan->_15), &(conf->_15), 3);
  	WRITESHM(arlan->_15, conf->_15, u_short);
  	WRITESHM(arlan->headerSize, conf->headerSize, u_short);
  	if (arlan_EEPROM_bad)
  		WRITESHM(arlan->hardwareType, conf->hardwareType, u_char);
  	WRITESHM(arlan->radioType, conf->radioType, u_char);
  	if (arlan_EEPROM_bad)
  		WRITESHM(arlan->radioModule, conf->radioType, u_char);
  
  	memcpy_toio(arlan->encryptionKey + keyStart, encryptionKey, 8);
  	memcpy_toio(arlan->name, conf->siteName, 16);
  
  	WRITESHMB(arlan->commandByte, ARLAN_COM_INT | ARLAN_COM_CONF);	/* do configure */
  	memset_io(arlan->commandParameter, 0, 0xf);	/* 0xf */
  	memset_io(arlan->commandParameter + 1, 0, 2);
  	if (conf->writeEEPROM)
  	{
  		  memset_io(arlan->commandParameter, conf->writeEEPROM, 1);
  //		conf->writeEEPROM=0;
  	}
  	if (conf->registrationMode && conf->registrationInterrupts)
  		memset_io(arlan->commandParameter + 3, 1, 1);
  	else
  		memset_io(arlan->commandParameter + 3, 0, 1);
  
  	priv->irq_test_done = 0;
  
  	if (conf->tx_queue_len)
  		dev->tx_queue_len = conf->tx_queue_len;
  	udelay(100);
  
  	ARLAN_DEBUG_EXIT("arlan_hw_config");
  	return 0;
  }
  
  
  static int arlan_read_card_configuration(struct net_device *dev)
  {
  	u_char tlx415;
  	volatile struct arlan_shmem *arlan = ((struct arlan_private *) dev->priv)->card;
  	struct arlan_conf_stru *conf = ((struct arlan_private *) dev->priv)->Conf;
  
  	ARLAN_DEBUG_ENTRY("arlan_read_card_configuration");
  
  	if (radioNodeId == radioNodeIdUNKNOWN)
  	{
  		READSHM(conf->radioNodeId, arlan->radioNodeId, u_short);
  	}
  	else
  		conf->radioNodeId = radioNodeId;
  		
  	if (SID == SIDUNKNOWN)
  	{
  		READSHM(conf->SID, arlan->SID, u_int);
  	}
  	else conf->SID = SID;
  		
  	if (spreadingCode == spreadingCodeUNKNOWN)
  	{
  		  READSHM(conf->spreadingCode, arlan->spreadingCode, u_char);
  	}
  	else
  		conf->spreadingCode = spreadingCode;
  		
  	if (channelSet == channelSetUNKNOWN)
  	{
  		READSHM(conf->channelSet, arlan->channelSet, u_char);
  	}
  	else conf->channelSet = channelSet;
  
  	if (channelNumber == channelNumberUNKNOWN)
  	{
  		READSHM(conf->channelNumber, arlan->channelNumber, u_char);
  	}
  	else conf->channelNumber = channelNumber;
  	
  	READSHM(conf->scramblingDisable, arlan->scramblingDisable, u_char);
  	READSHM(conf->txAttenuation, arlan->txAttenuation, u_char);
  	
  	if (systemId == systemIdUNKNOWN)
  	{
  		READSHM(conf->systemId, arlan->systemId, u_int);
  	} 
  	else conf->systemId = systemId;
  	
  	READSHM(conf->maxDatagramSize, arlan->maxDatagramSize, u_short);
  	READSHM(conf->maxFrameSize, arlan->maxFrameSize, u_short);
  	READSHM(conf->maxRetries, arlan->maxRetries, u_char);
  	READSHM(conf->receiveMode, arlan->receiveMode, u_char);
  	READSHM(conf->priority, arlan->priority, u_char);
  	READSHM(conf->rootOrRepeater, arlan->rootOrRepeater, u_char);
  
  	if (SID == SIDUNKNOWN)
  	{
  		  READSHM(conf->SID, arlan->SID, u_int);
  	}
  	else conf->SID = SID;
  	
  	if (registrationMode == registrationModeUNKNOWN)
  	{
  		  READSHM(conf->registrationMode, arlan->registrationMode, u_char);
  	}
  	else conf->registrationMode = registrationMode;
  	
  	READSHM(conf->registrationFill, arlan->registrationFill, u_char);
  	READSHM(conf->localTalkAddress, arlan->localTalkAddress, u_char);
  	READSHM(conf->codeFormat, arlan->codeFormat, u_char);
  	READSHM(conf->numChannels, arlan->numChannels, u_char);
  	READSHM(conf->channel1, arlan->channel1, u_char);
  	READSHM(conf->channel2, arlan->channel2, u_char);
  	READSHM(conf->channel3, arlan->channel3, u_char);
  	READSHM(conf->channel4, arlan->channel4, u_char);
  	READSHM(conf->waitTime, arlan->waitTime, u_short);
  	READSHM(conf->lParameter, arlan->lParameter, u_short);
  	READSHM(conf->_15, arlan->_15, u_short);
  	READSHM(conf->headerSize, arlan->headerSize, u_short);
  	READSHM(conf->hardwareType, arlan->hardwareType, u_char);
  	READSHM(conf->radioType, arlan->radioModule, u_char);
  	
  	if (conf->radioType == 0)
  		conf->radioType = 0xc;
  
  	WRITESHM(arlan->configStatus, 0xA5, u_char);
  	READSHM(tlx415, arlan->configStatus, u_char);
  	
  	if (tlx415 != 0xA5)
  		printk(KERN_INFO "%s tlx415 chip \n", dev->name);
  	
  	conf->txClear = 0;
  	conf->txRetries = 1;
  	conf->txRouting = 1;
  	conf->txScrambled = 0;
  	conf->rxParameter = 1;
  	conf->txTimeoutMs = 4000;
  	conf->waitCardTimeout = 100000;
  	conf->receiveMode = ARLAN_RCV_CLEAN;
  	memcpy_fromio(conf->siteName, arlan->name, 16);
  	conf->siteName[16] = '\0';
  	conf->retries = retries;
  	conf->tx_delay_ms = tx_delay_ms;
  	conf->async = async;
  	conf->ReTransmitPacketMaxSize = 200;
  	conf->waitReTransmitPacketMaxSize = 200;
  	conf->txAckTimeoutMs = 900;
  	conf->fastReTransCount = 3;
  
  	ARLAN_DEBUG_EXIT("arlan_read_card_configuration");
  
  	return 0;
  }
  
  
  static int lastFoundAt = 0xbe000;
  
  
  /*
   * This is the real probe routine. Linux has a history of friendly device
   * probes on the ISA bus. A good device probes avoids doing writes, and
   * verifies that the correct device exists and functions.
   */
  
  static int __init arlan_check_fingerprint(int memaddr)
  {
  	static char probeText[] = "TELESYSTEM SLW INC.    ARLAN \0";
  	char tempBuf[49];
  	volatile struct arlan_shmem *arlan = (struct arlan_shmem *) memaddr;
  
  	ARLAN_DEBUG_ENTRY("arlan_check_fingerprint");
  	if (check_mem_region(virt_to_phys((void *)memaddr),0x2000 )){
  		// printk(KERN_WARNING "arlan: memory region %lx excluded from probing \n",virt_to_phys((void*)memaddr));
  		return -ENODEV;
  	};
  	memcpy_fromio(tempBuf, arlan->textRegion, 29);
  	tempBuf[30] = 0;
  
  	/* check for card at this address */
  	if (0 != strncmp(tempBuf, probeText, 29)){
  // not 		release_mem_region(virt_to_phys((void*)memaddr),0x2000);
  		return -ENODEV;
  	}
  
  //   printk(KERN_INFO "arlan found at 0x%x \n",memaddr);
  	ARLAN_DEBUG_EXIT("arlan_check_fingerprint");
  
  	return 0;
  
  
  }
  
  int __init arlan_probe_everywhere(struct net_device *dev)
  {
  	int m;
  	int probed = 0;
  	int found = 0;
  
  	SET_MODULE_OWNER(dev);
  
  	ARLAN_DEBUG_ENTRY("arlan_probe_everywhere");
  	if (mem != 0 && numDevices == 1)	/* Check a single specified location. */
  	{
  		if (arlan_probe_here(dev, (int) phys_to_virt(  mem) ) == 0)
  			return 0;
  		else
  			return -ENODEV;
  	}
  	for (m = (int)phys_to_virt(lastFoundAt) + 0x2000; m <= (int)phys_to_virt(0xDE000); m += 0x2000)
  	{
  		if (arlan_probe_here(dev, m) == 0)
  		{
  			found++;
  			lastFoundAt = (int)virt_to_phys((void*)m);
  			break;
  		}
  		probed++;
  	}
  	if (found == 0 && probed != 0)
  	{
  		if (lastFoundAt == 0xbe000)
  			printk(KERN_ERR "arlan: No Arlan devices found \n");
  		return -ENODEV;
  	}
  	else
  		return 0;
  
  	ARLAN_DEBUG_EXIT("arlan_probe_everywhere");
  
  	return -ENODEV;
  }
  
  int __init arlan_find_devices(void)
  {
  	int m;
  	int found = 0;
  
  	ARLAN_DEBUG_ENTRY("arlan_find_devices");
  	if (mem != 0 && numDevices == 1)	/* Check a single specified location. */
  		return 1;
  	for (m =(int) phys_to_virt(0xc0000); m <=(int) phys_to_virt(0xDE000); m += 0x2000)
  	{
  		if (arlan_check_fingerprint(m) == 0)
  			found++;
  	}
  	ARLAN_DEBUG_EXIT("arlan_find_devices");
  
  	return found;
  }
  
  
  static int arlan_change_mtu(struct net_device *dev, int new_mtu)
  {
  	struct arlan_conf_stru *conf = ((struct arlan_private *) dev->priv)->Conf;
  
  	ARLAN_DEBUG_ENTRY("arlan_change_mtu");
  	if ((new_mtu < 68) || (new_mtu > 2032))
  		return -EINVAL;
  	dev->mtu = new_mtu;
  	if (new_mtu < 256)
  		new_mtu = 256;	/* cards book suggests 1600 */
  	conf->maxDatagramSize = new_mtu;
  	conf->maxFrameSize = new_mtu + 48;
  
  	arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_CONF);
  	printk(KERN_NOTICE "%s mtu changed to %d \n", dev->name, new_mtu);
  
  	ARLAN_DEBUG_EXIT("arlan_change_mtu");
  
  	return 0;
  }
  
  static int arlan_mac_addr(struct net_device *dev, void *p)
  {
  	struct sockaddr *addr = p;
  
  
  	ARLAN_DEBUG_ENTRY("arlan_mac_addr");
  	return -EINVAL;
  
  	if (!netif_running(dev))
  		return -EBUSY;
  	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
  
  	ARLAN_DEBUG_EXIT("arlan_mac_addr");
  	return 0;
  }
  
  
  
  
  static int __init
  	      arlan_allocate_device(int num, struct net_device *devs)
  {
  
  	struct net_device *dev;
  
  	ARLAN_DEBUG_ENTRY("arlan_allocate_device");
  
  	if (!devs)
  		dev = init_etherdev(0, sizeof(struct arlan_private));
  	else
  	{
  		dev = devs;
  		dev->priv = kmalloc(sizeof(struct arlan_private), GFP_KERNEL);
  	};
  
  	if (dev == NULL || dev->priv == NULL)
  	{
  		printk(KERN_CRIT "init_etherdev failed ");
  		return 0;
  	}
  
  	memset(dev->priv,0,sizeof(struct arlan_private));
  
  	((struct arlan_private *) dev->priv)->conf =
  	    kmalloc(sizeof(struct arlan_shmem), GFP_KERNEL);
  
  	if (dev == NULL || dev->priv == NULL ||
  	    ((struct arlan_private *) dev->priv)->conf == NULL)
  	{
  		return 0;
  		printk(KERN_CRIT " No memory at arlan_allocate_device \n");
  	}
  	/* Fill in the 'dev' fields. */
  	dev->base_addr = 0;
  	dev->mem_start = 0;
  	dev->mem_end = 0;
  	dev->mtu = 1500;
  	dev->flags = 0;		/* IFF_BROADCAST & IFF_MULTICAST & IFF_PROMISC; */
  	dev->irq = 0;
  	dev->dma = 0;
  	dev->tx_queue_len = tx_queue_len;
  	ether_setup(dev);
  	dev->tx_queue_len = tx_queue_len;
  	dev->open = arlan_open;
  	dev->stop = arlan_close;
  	dev->hard_start_xmit = arlan_tx;
  	dev->get_stats = arlan_statistics;
  	dev->set_multicast_list = arlan_set_multicast;
  	dev->change_mtu = arlan_change_mtu;
  	dev->set_mac_address = arlan_mac_addr;
  	dev->tx_timeout = arlan_tx_timeout;
  	dev->watchdog_timeo = 3*HZ;
  	
  	((struct arlan_private *) dev->priv)->irq_test_done = 0;
  	arlan_device[num] = dev;
  	((struct arlan_private *) arlan_device[num]->priv)->Conf = &(arlan_conf[num]);
  
  	((struct arlan_private *) dev->priv)->Conf->pre_Command_Wait = 40;
  	((struct arlan_private *) dev->priv)->Conf->rx_tweak1 = 30;
  	((struct arlan_private *) dev->priv)->Conf->rx_tweak2 = 0;
  
  	ARLAN_DEBUG_EXIT("arlan_allocate_device");
  	return (int) dev;
  }
  
  
  int __init arlan_probe_here(struct net_device *dev, int memaddr)
  {
  	volatile struct arlan_shmem *arlan;
  
  	ARLAN_DEBUG_ENTRY("arlan_probe_here");
  
  	if (arlan_check_fingerprint(memaddr))
  		return -ENODEV;
  
  	printk(KERN_NOTICE "%s: Arlan found at %x, \n ", dev->name, (int) virt_to_phys((void*)memaddr));
  
  	if (!arlan_allocate_device(arlans_found, dev))
  		return -1;
  
  	((struct arlan_private *) dev->priv)->card = (struct arlan_shmem *) memaddr;
  	arlan = (void *) memaddr;
  
  	dev->mem_start = memaddr;
  	dev->mem_end = memaddr + 0x1FFF;
  
  	if (dev->irq < 2)
  	{
  		READSHM(dev->irq, arlan->irqLevel, u_char);
  	} else if (dev->irq == 2)
  		dev->irq = 9;
  
  	arlan_read_card_configuration(dev);
  
  	ARLAN_DEBUG_EXIT("arlan_probe_here");
  	return 0;
  }
  
  
  
  
  static int arlan_open(struct net_device *dev)
  {
  	struct arlan_private *priv = (struct arlan_private *) dev->priv;
  	volatile struct arlan_shmem *arlan = priv->card;
  	int ret = 0;
  
  	ARLAN_DEBUG_ENTRY("arlan_open");
  
  	if (dev->mem_start == 0)
  		ret = arlan_probe_everywhere(dev);
  	if (ret != 0)
  		return ret;
  
  	arlan = ((struct arlan_private *) dev->priv)->card;
  	ret = request_irq(dev->irq, &arlan_interrupt, 0, dev->name, dev);
  	if (ret)
  	{
  		printk(KERN_ERR "%s: unable to get IRQ %d .\n",
  			dev->name, dev->irq);
  		return ret;
  	}
  
  
  	priv->bad = 0;
  	priv->lastReset = 0;
  	priv->reset = 0;
  	priv->open_time = jiffies;
  	memcpy_fromio(dev->dev_addr, arlan->lanCardNodeId, 6);
  	memset(dev->broadcast, 0xff, 6);
  	priv->txOffset = 0;
  	dev->tx_queue_len = tx_queue_len;
  	priv->interrupt_processing_active = 0;
  	priv->command_lock = 0;
  
  	netif_start_queue (dev);
  
  	init_MUTEX(&priv->card_lock);
  	myATOMIC_INIT(priv->card_users, 1);	/* damn 2.0.33 */
  	priv->registrationLostCount = 0;
  	priv->registrationLastSeen = jiffies;
  	priv->txLast = 0;
  	priv->tx_command_given = 0;
  	priv->rx_command_given = 0;
  	
  	priv->reRegisterExp = 1;
  	priv->nof_tx = 0;
  	priv->nof_tx_ack = 0;
  	priv->last_command_was_rx = 0;
  	priv->tx_last_sent = jiffies - 1;
  	priv->tx_last_cleared = jiffies;
  	priv->Conf->writeEEPROM = 0;
  	priv->Conf->registrationInterrupts = 1;
  
  	init_timer(&priv->timer);
  	priv->timer.expires = jiffies + HZ / 10;
  	priv->timer.data = (unsigned long) dev;
  	priv->timer.function = &arlan_registration_timer;	/* timer handler */
  
  	arlan_command(dev, ARLAN_COMMAND_POWERUP | ARLAN_COMMAND_LONG_WAIT_NOW);
  	mdelay(200);
  	add_timer(&priv->timer);
  
  #ifdef CONFIG_PROC_FS
  #ifndef MODULE
  	if (arlan_device[0])
  		init_arlan_proc();
  #endif
  #endif
  	ARLAN_DEBUG_EXIT("arlan_open");
  	return 0;
  }
  
  
  static void arlan_tx_timeout (struct net_device *dev)
  {
  	printk(KERN_ERR "%s: arlan transmit timed out, kernel decided\n", dev->name);
  	/* Try to restart the adaptor. */
  	arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
  	// dev->trans_start = jiffies;
  	// netif_start_queue (dev);
  }
  
  
  static int arlan_tx(struct sk_buff *skb, struct net_device *dev)
  {
  	struct arlan_private *priv = ((struct arlan_private *) dev->priv);
  	short length;
  	unsigned char *buf;
  
  	ARLAN_DEBUG_ENTRY("arlan_tx");
  	
  	length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
  	buf = skb->data;
  
  	if (priv->txOffset + length + 0x12 > 0x800) {
  		printk(KERN_ERR "TX RING overflow \n");
  		netif_stop_queue (dev);
  	}
  
  	if (arlan_hw_tx(dev, buf, length) == -1)
  		goto bad_end;
  
  	dev->trans_start = jiffies;
  
  	dev_kfree_skb(skb);
  
  	arlan_process_interrupt(dev);
  	priv->tx_chain_active = 0;
  	ARLAN_DEBUG_EXIT("arlan_tx");
  	return 0;
  
  bad_end:
  	arlan_process_interrupt(dev);
  	priv->tx_chain_active = 0;
  	netif_stop_queue (dev);
  	ARLAN_DEBUG_EXIT("arlan_tx");
  	return 1;
  }
  
  
  extern inline int DoNotReTransmitCrap(struct net_device *dev)
  {
  	struct arlan_private *priv = ((struct arlan_private *) dev->priv);
  
  	if (TXLAST(dev).length < priv->Conf->ReTransmitPacketMaxSize)
  		return 1;
  	return 0;
  
  }
  
  extern inline int DoNotWaitReTransmitCrap(struct net_device *dev)
  {
  	struct arlan_private *priv = ((struct arlan_private *) dev->priv);
  
  	if (TXLAST(dev).length < priv->Conf->waitReTransmitPacketMaxSize)
  		return 1;
  	return 0;
  }
  
  extern inline void arlan_queue_retransmit(struct net_device *dev)
  {
  	struct arlan_private *priv = ((struct arlan_private *) dev->priv);
  
  	ARLAN_DEBUG_ENTRY("arlan_queue_retransmit");
  
  	if (DoNotWaitReTransmitCrap(dev))
  	{
  		  arlan_drop_tx(dev);
  	} else
  		priv->ReTransmitRequested++;
  
  	ARLAN_DEBUG_EXIT("arlan_queue_retransmit");
  };
  
  extern inline void RetryOrFail(struct net_device *dev)
  {
  	struct arlan_private *priv = ((struct arlan_private *) dev->priv);
  
  	ARLAN_DEBUG_ENTRY("RetryOrFail");
  
  	if (priv->retransmissions > priv->Conf->retries ||
  	    DoNotReTransmitCrap(dev))
  	{
  		arlan_drop_tx(dev);
  	}
  	else if (priv->bad <= priv->Conf->fastReTransCount)
  	{
  		arlan_retransmit_now(dev);
  	}
  	else arlan_queue_retransmit(dev);
  
  	ARLAN_DEBUG_EXIT("RetryOrFail");
  }
  
  
  static void arlan_tx_done_interrupt(struct net_device *dev, int status)
  {
  	struct arlan_private *priv = ((struct arlan_private *) dev->priv);
  
  	ARLAN_DEBUG_ENTRY("arlan_tx_done_interrupt");
  
  	priv->tx_last_cleared = jiffies;
  	priv->tx_command_given = 0;
  	priv->nof_tx_ack++;
  	switch (status)
  	{
  		case 1:
  		{
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  				printk("arlan intr: transmit OK\n");
  			priv->stats.tx_packets++;
  			priv->bad = 0;
  			priv->reset = 0;
  			priv->retransmissions = 0;
  			if (priv->Conf->tx_delay_ms)
  			{
  				priv->tx_done_delayed = jiffies + (priv->Conf->tx_delay_ms * HZ) / 1000 + 1;;
  			}
  			else
  			{
  				TXLAST(dev).offset = 0;
  				if (priv->txLast)
  					priv->txLast = 0;
  				else if (TXTAIL(dev).offset)
  					priv->txLast = 1;
  				if (TXLAST(dev).offset)
  				{
  					arlan_retransmit_now(dev);
  					dev->trans_start = jiffies;
  				}
  				if (!TXHEAD(dev).offset || !TXTAIL(dev).offset)
  				{
  					priv->txOffset = 0;
  					netif_wake_queue (dev);
  				}
  			}
  		}
  		break;
  		
  		case 2:
  		{
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  				printk("arlan intr: transmit timed out\n");
  			priv->bad += 1;
  			//arlan_queue_retransmit(dev);
  			RetryOrFail(dev);
  		}
  		break;
  
  		case 3:
  		{
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  				printk("arlan intr: transmit max retries\n");
  			priv->bad += 1;
  			priv->reset = 0;
  			//arlan_queue_retransmit(dev);
  			RetryOrFail(dev);
  		}
  		break;
  		
  		case 4:
  		{
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  				printk("arlan intr: transmit aborted\n");
  			priv->bad += 1;
  			arlan_queue_retransmit(dev);
  			//RetryOrFail(dev);
  		}
  		break;
  
  		case 5:
  		{
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  				printk("arlan intr: transmit not registered\n");
  			priv->bad += 1;
  			//debug=101;
  			arlan_queue_retransmit(dev);
  		}
  		break;
  
  		case 6:
  		{
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN) 
  				printk("arlan intr: transmit destination full\n");
  			priv->bad += 1;
  			priv->reset = 0;
  			//arlan_drop_tx(dev);
  			arlan_queue_retransmit(dev);
  		}
  		break;
  
  		case 7:
  		{
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  				printk("arlan intr: transmit unknown ack\n");
  			priv->bad += 1;
  			priv->reset = 0;
  			arlan_queue_retransmit(dev);
  		}
  		break;
  		
  		case 8:
  		{
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  				printk("arlan intr: transmit dest mail box full\n");
  			priv->bad += 1;
  			priv->reset = 0;
  			//arlan_drop_tx(dev);
  			arlan_queue_retransmit(dev);
  		}
  		break;
  
  		case 9:
  		{
  			IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
  				printk("arlan intr: transmit root dest not reg.\n");
  			priv->bad += 1;
  			priv->reset = 1;
  			//arlan_drop_tx(dev);
  			arlan_queue_retransmit(dev);
  		}
  		break;
  
  		default:
  		{
  			printk(KERN_ERR "arlan intr: transmit status unknown\n");
  			priv->bad += 1;
  			priv->reset = 1;
  			arlan_drop_tx(dev);
  		}
  	}
  
  	ARLAN_DEBUG_EXIT("arlan_tx_done_interrupt");
  }
  
  
  static void arlan_rx_interrupt(struct net_device *dev, u_char rxStatus, u_short rxOffset, u_short pkt_len)
  {
  	char *skbtmp;
  	int i = 0;
  
  	struct arlan_private *priv = (struct arlan_private *) dev->priv;
  	volatile struct arlan_shmem *arlan = priv->card;
  	struct arlan_conf_stru *conf = priv->Conf;
  
  
  	ARLAN_DEBUG_ENTRY("arlan_rx_interrupt");
  	// by spec,   not                WRITESHMB(arlan->rxStatus,0x00);
  	// prohibited here              arlan_command(dev, ARLAN_COMMAND_RX);
  
  	if (pkt_len < 10 || pkt_len > 2048)
  	{
  		printk(KERN_WARNING "%s: got too short or long packet, len %d \n", dev->name, pkt_len);
  		return;
  	}
  	if (rxOffset + pkt_len > 0x2000)
  	{
  		printk("%s: got too long packet, len %d offset %x\n", dev->name, pkt_len, rxOffset);
  		return;
  	}
  	priv->in_bytes += pkt_len;
  	priv->in_bytes10 += pkt_len;
  	if (conf->measure_rate < 1)
  		conf->measure_rate = 1;
  	if (jiffies - priv->in_time > conf->measure_rate * HZ)
  	{
  		conf->in_speed = priv->in_bytes / conf->measure_rate;
  		priv->in_bytes = 0;
  		priv->in_time = jiffies;
  	}
  	if (jiffies - priv->in_time10 > conf->measure_rate * HZ * 10)
  	{
  		conf->in_speed10 = priv->in_bytes10 / (10 * conf->measure_rate);
  		priv->in_bytes10 = 0;
  		priv->in_time10 = jiffies;
  	}
  	DEBUGSHM(1, "arlan rcv pkt rxStatus= %d ", arlan->rxStatus, u_char);
  	switch (rxStatus)
  	{
  		case 1:
  		case 2:
  		case 3:
  		{
  			/* Malloc up new buffer. */
  			struct sk_buff *skb;
  
  			DEBUGSHM(50, "arlan recv pkt offs=%d\n", arlan->rxOffset, u_short);
  			DEBUGSHM(1, "arlan rxFrmType = %d \n", arlan->rxFrmType, u_char);
  			DEBUGSHM(1, KERN_INFO "arlan rx scrambled = %d \n", arlan->scrambled, u_char);
  
  			/* here we do multicast filtering to avoid slow 8-bit memcopy */
  #ifdef ARLAN_MULTICAST
  			if (!(dev->flags & IFF_ALLMULTI) &&
  				!(dev->flags & IFF_PROMISC) &&
  				dev->mc_list)
  			{
  				char hw_dst_addr[6];
  				struct dev_mc_list *dmi = dev->mc_list;
  				int i;
  
  				memcpy_fromio(hw_dst_addr, arlan->ultimateDestAddress, 6);
  				if (hw_dst_addr[0] == 0x01)
  				{
  					if (mdebug)
  						if (hw_dst_addr[1] == 0x00)
  							printk(KERN_ERR "%s mcast 0x0100 \n", dev->name);
  						else if (hw_dst_addr[1] == 0x40)
  							printk(KERN_ERR "%s m/bcast 0x0140 \n", dev->name);
  					while (dmi)
  					{							if (dmi->dmi_addrlen == 6)
  						{
  							if (arlan_debug & ARLAN_DEBUG_HEADER_DUMP)
  								printk(KERN_ERR "%s mcl %2x:%2x:%2x:%2x:%2x:%2x \n", dev->name,
  										 dmi->dmi_addr[0], dmi->dmi_addr[1], dmi->dmi_addr[2],
  										 dmi->dmi_addr[3], dmi->dmi_addr[4], dmi->dmi_addr[5]);
  							for (i = 0; i < 6; i++)
  								if (dmi->dmi_addr[i] != hw_dst_addr[i])
  									break;
  							if (i == 6)
  								break;
  						}
  						else
  							printk(KERN_ERR "%s: invalid multicast address length given.\n", dev->name);
  						dmi = dmi->next;
  					}
  					/* we reach here if multicast filtering is on and packet 
  					 * is multicast and not for receive */
  					goto end_of_interupt;
  				}
  			}
  #endif				// ARLAN_MULTICAST
  			/* multicast filtering ends here */
  			pkt_len += ARLAN_FAKE_HDR_LEN;
  
  			skb = dev_alloc_skb(pkt_len + 4);
  			if (skb == NULL)
  			{
  				printk(KERN_ERR "%s: Memory squeeze, dropping packet.\n", dev->name);
  				priv->stats.rx_dropped++;
  				break;
  			}
  			skb_reserve(skb, 2);
  			skb->dev = dev;
  			skbtmp = skb_put(skb, pkt_len);
  
  			memcpy_fromio(skbtmp + ARLAN_FAKE_HDR_LEN, ((char *) arlan) + rxOffset, pkt_len - ARLAN_FAKE_HDR_LEN);
  			memcpy_fromio(skbtmp, arlan->ultimateDestAddress, 6);
  			memcpy_fromio(skbtmp + 6, arlan->rxSrc, 6);
  			WRITESHMB(arlan->rxStatus, 0x00);
  			arlan_command(dev, ARLAN_COMMAND_RX);
  
  			IFDEBUG(ARLAN_DEBUG_HEADER_DUMP)
  			{
  				char immedDestAddress[6];
  				char immedSrcAddress[6];
  				memcpy_fromio(immedDestAddress, arlan->immedDestAddress, 6);
  				memcpy_fromio(immedSrcAddress, arlan->immedSrcAddress, 6);
  
  				printk(KERN_WARNING "%s t %2x:%2x:%2x:%2x:%2x:%2x f %2x:%2x:%2x:%2x:%2x:%2x imd %2x:%2x:%2x:%2x:%2x:%2x ims %2x:%2x:%2x:%2x:%2x:%2x\n", dev->name,
  					(unsigned char) skbtmp[0], (unsigned char) skbtmp[1], (unsigned char) skbtmp[2], (unsigned char) skbtmp[3],
  					(unsigned char) skbtmp[4], (unsigned char) skbtmp[5], (unsigned char) skbtmp[6], (unsigned char) skbtmp[7],
  					(unsigned char) skbtmp[8], (unsigned char) skbtmp[9], (unsigned char) skbtmp[10], (unsigned char) skbtmp[11],
  					immedDestAddress[0], immedDestAddress[1], immedDestAddress[2],
  					immedDestAddress[3], immedDestAddress[4], immedDestAddress[5],
  					immedSrcAddress[0], immedSrcAddress[1], immedSrcAddress[2],
  					immedSrcAddress[3], immedSrcAddress[4], immedSrcAddress[5]);
  			}
  			skb->protocol = eth_type_trans(skb, dev);
  			IFDEBUG(ARLAN_DEBUG_HEADER_DUMP)
  				if (skb->protocol != 0x608 && skb->protocol != 0x8)
  				{
  					for (i = 0; i <= 22; i++)
  						printk("%02x:", (u_char) skbtmp[i + 12]);
  					printk(KERN_ERR "\n");
  					printk(KERN_WARNING "arlan kernel pkt type trans %x \n", skb->protocol);
  				}
  			netif_rx(skb);
  			priv->stats.rx_packets++;
  		}
  		break;
  		
  		default:
  			printk(KERN_ERR "arlan intr: recieved unknown status\n");
  			priv->stats.rx_crc_errors++;
  			break;
  	}
  	ARLAN_DEBUG_EXIT("arlan_rx_interrupt");
  }
  
  static void arlan_process_interrupt(struct net_device *dev)
  {
  	struct arlan_private *priv = (struct arlan_private *) dev->priv;
  	volatile struct arlan_shmem *arlan = priv->card;
  	u_char rxStatus = READSHMB(arlan->rxStatus);
  	u_char txStatus = READSHMB(arlan->txStatus);
  	u_short rxOffset = READSHMS(arlan->rxOffset);
  	u_short pkt_len = READSHMS(arlan->rxLength);
  	int interrupt_count = 0;
  
  	ARLAN_DEBUG_ENTRY("arlan_process_interrupt");
  
  	if (test_and_set_bit(0, (void *) &priv->interrupt_processing_active))
  	{
  		if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS)
  			printk(KERN_ERR "interrupt chain reentering \n");
  		goto end_int_process;
  	}
  	while ((rxStatus || txStatus || priv->interrupt_ack_requested)
  			&& (interrupt_count < 5))
  	{
  		if (rxStatus)
  			priv->last_rx_int_ack_time = arlan_time();
  
  		arlan_command(dev, ARLAN_COMMAND_INT_ACK);
  		arlan_command(dev, ARLAN_COMMAND_INT_ENABLE);
  		
  		IFDEBUG(ARLAN_DEBUG_INTERRUPT)
  			printk(KERN_ERR "%s:  got IRQ rx %x tx %x comm %x rxOff %x rxLen %x \n",
  					dev->name, rxStatus, txStatus, READSHMB(arlan->commandByte),
  					rxOffset, pkt_len);
  
  		if (rxStatus == 0 && txStatus == 0)
  		{
  			priv->last_command_was_rx = 0;
  			if (priv->irq_test_done)
  			{
  				if (!registrationBad(dev))
  					IFDEBUG(ARLAN_DEBUG_INTERRUPT) printk(KERN_ERR "%s unknown interrupt(nop? regLost ?) reason tx %d rx %d ",
  										    dev->name, txStatus, rxStatus);
  			} else {
  				IFDEBUG(ARLAN_DEBUG_INTERRUPT)
  					printk(KERN_INFO "%s irq $%d test OK \n", dev->name, dev->irq);
  
  			}
  			priv->interrupt_ack_requested = 0;
  			goto ends;
  		}
  		if (txStatus != 0)
  		{
  			WRITESHMB(arlan->txStatus, 0x00);
  			arlan_tx_done_interrupt(dev, txStatus);
  			goto ends;
  		}
  		if (rxStatus == 1 || rxStatus == 2)
  		{		/* a packet waiting */
  			arlan_rx_interrupt(dev, rxStatus, rxOffset, pkt_len);
  			goto ends;
  		}
  		if (rxStatus > 2 && rxStatus < 0xff)
  		{
  			priv->last_command_was_rx = 0;
  			WRITESHMB(arlan->rxStatus, 0x00);
  			printk(KERN_ERR "%s unknown rxStatus reason tx %d rx %d ",
  				dev->name, txStatus, rxStatus);
  			goto ends;
  		}
  		if (rxStatus == 0xff)
  		{
  			priv->last_command_was_rx = 0;
  			WRITESHMB(arlan->rxStatus, 0x00);
  			arlan_command(dev, ARLAN_COMMAND_RX);
  			if (registrationBad(dev))
  				netif_device_detach(dev);
  			if (!registrationBad(dev))
  			{
  				priv->registrationLastSeen = jiffies;
  				if (!netif_queue_stopped(dev) && !priv->under_reset && !priv->under_config)
  					netif_wake_queue (dev);
  			}
  			goto ends;
  		}
  ends:
  
  		arlan_command_process(dev);
  
  		rxStatus = READSHMB(arlan->rxStatus);
  		txStatus = READSHMB(arlan->txStatus);
  		rxOffset = READSHMS(arlan->rxOffset);
  		pkt_len = READSHMS(arlan->rxLength);
  
  
  		priv->irq_test_done = 1;
  
  		interrupt_count++;
  	}
  	priv->interrupt_processing_active = 0;
  
  end_int_process:
  	arlan_command_process(dev);
  
  	ARLAN_DEBUG_EXIT("arlan_process_interrupt");
  	return;
  }
  
  static void arlan_interrupt(int irq, void *dev_id, struct pt_regs *regs)
  {
  	struct net_device *dev = dev_id;
  	struct arlan_private *priv = (struct arlan_private *) dev->priv;
  	volatile struct arlan_shmem *arlan = priv->card;
  	u_char rxStatus = READSHMB(arlan->rxStatus);
  	u_char txStatus = READSHMB(arlan->txStatus);
  
  	ARLAN_DEBUG_ENTRY("arlan_interrupt");
  
  
  	if (!rxStatus && !txStatus)
  		priv->interrupt_ack_requested++;
  
  	arlan_process_interrupt(dev);
  	
  	priv->irq_test_done = 1;
  
  	ARLAN_DEBUG_EXIT("arlan_interrupt");
  	return;
  
  }
  
  
  static int arlan_close(struct net_device *dev)
  {
  	struct arlan_private *priv = (struct arlan_private *) dev->priv;
  
  	if (!dev)
  	{
  		printk(KERN_CRIT "arlan: No Device\n");
  		return 0;
  	}
  	priv = (struct arlan_private *) dev->priv;
  	if (!priv)
  	{
  		printk(KERN_CRIT "arlan: No Device priv \n");
  		return 0;
  	}
  	ARLAN_DEBUG_ENTRY("arlan_close");
  
  	del_timer(&priv->timer);
  
  	arlan_command(dev, ARLAN_COMMAND_POWERDOWN);
  
  	IFDEBUG(ARLAN_DEBUG_STARTUP)
  		printk(KERN_NOTICE "%s: Closing device\n", dev->name);
  
  	priv->open_time = 0;
  	netif_stop_queue(dev);
  	free_irq(dev->irq, dev);
  
  	ARLAN_DEBUG_EXIT("arlan_close");
  	return 0;
  }
  
  #ifdef ARLAN_DEBUGING
  static long alignLong(volatile u_char * ptr)
  {
  	long ret;
  	memcpy_fromio(&ret, (void *) ptr, 4);
  	return ret;
  }
  #endif
  
  /*
   * Get the current statistics.
   * This may be called with the card open or closed.
   */
  
  static struct net_device_stats *arlan_statistics(struct net_device *dev)
  {
  	struct arlan_private *priv = (struct arlan_private *) dev->priv;
  	volatile struct arlan_shmem *arlan = ((struct arlan_private *) dev->priv)->card;
  
  
  	ARLAN_DEBUG_ENTRY("arlan_statistics");
  
  	/* Update the statistics from the device registers. */
  
  	READSHM(priv->stats.collisions, arlan->numReTransmissions, u_int);
  	READSHM(priv->stats.rx_crc_errors, arlan->numCRCErrors, u_int);
  	READSHM(priv->stats.rx_dropped, arlan->numFramesDiscarded, u_int);
  	READSHM(priv->stats.rx_fifo_errors, arlan->numRXBufferOverflows, u_int);
  	READSHM(priv->stats.rx_frame_errors, arlan->numReceiveFramesLost, u_int);
  	READSHM(priv->stats.rx_over_errors, arlan->numRXOverruns, u_int);
  	READSHM(priv->stats.rx_packets, arlan->numDatagramsReceived, u_int);
  	READSHM(priv->stats.tx_aborted_errors, arlan->numAbortErrors, u_int);
  	READSHM(priv->stats.tx_carrier_errors, arlan->numStatusTimeouts, u_int);
  	READSHM(priv->stats.tx_dropped, arlan->numDatagramsDiscarded, u_int);
  	READSHM(priv->stats.tx_fifo_errors, arlan->numTXUnderruns, u_int);
  	READSHM(priv->stats.tx_packets, arlan->numDatagramsTransmitted, u_int);
  	READSHM(priv->stats.tx_window_errors, arlan->numHoldOffs, u_int);
  
  	ARLAN_DEBUG_EXIT("arlan_statistics");
  
  	return &priv->stats;
  }
  
  
  static void arlan_set_multicast(struct net_device *dev)
  {
  	volatile struct arlan_shmem *arlan = ((struct arlan_private *) dev->priv)->card;
  	struct arlan_conf_stru *conf = ((struct arlan_private *) dev->priv)->Conf;
  	int board_conf_needed = 0;
  
  
  	ARLAN_DEBUG_ENTRY("arlan_set_multicast");
  
  	if (dev->flags & IFF_PROMISC)
  	{
  		unsigned char recMode;
  		READSHM(recMode, arlan->receiveMode, u_char);
  		conf->receiveMode = (ARLAN_RCV_PROMISC | ARLAN_RCV_CONTROL);
  		if (conf->receiveMode != recMode)
  			board_conf_needed = 1;
  	}
  	else
  	{
  		/* turn off promiscuous mode  */
  		unsigned char recMode;
  		READSHM(recMode, arlan->receiveMode, u_char);
  		conf->receiveMode = ARLAN_RCV_CLEAN | ARLAN_RCV_CONTROL;
  		if (conf->receiveMode != recMode)
  			board_conf_needed = 1;
  	}
  	if (board_conf_needed)
  		arlan_command(dev, ARLAN_COMMAND_CONF);
  
  	ARLAN_DEBUG_EXIT("arlan_set_multicast");
  }
  
  
  int __init arlan_probe(struct net_device *dev)
  {
  	printk("Arlan driver %s\n", arlan_version);
  
  	if (arlan_probe_everywhere(dev))
  		return -ENODEV;
  
  	arlans_found++;
  
  	if (arlans_found == 1)
  		siteName = kmalloc(100, GFP_KERNEL);
  	return 0;
  }
  
  #ifdef  MODULE
  
  int init_module(void)
  {
  	int i = 0;
  
  	ARLAN_DEBUG_ENTRY("init_module");
  
  	if (channelSet != channelSetUNKNOWN || channelNumber != channelNumberUNKNOWN || systemId != systemIdUNKNOWN)
  	{
  		printk(KERN_WARNING "arlan: wrong module params for multiple devices\n ");
  		return -1;
  	}
  	numDevices = arlan_find_devices();
  	if (numDevices == 0)
  	{
  		printk(KERN_ERR "arlan: no devices found \n");
  		return -1;
  	}
  
  	siteName = kmalloc(100, GFP_KERNEL);
  	if(siteName==NULL)
  	{
  		printk(KERN_ERR "arlan: No memory for site name.\n");
  		return -1;
  	}
  	for (i = 0; i < numDevices && i < MAX_ARLANS; i++)
  	{
  		if (!arlan_allocate_device(i, NULL))
  			return -1;
  		if (arlan_device[i] == NULL)
  		{
  			printk(KERN_CRIT "arlan: Not Enough memory \n");
  			return -1;
  		}
  		if (probe)
  			arlan_probe_everywhere(arlan_device[i]);
  //		arlan_command(arlan_device[i], ARLAN_COMMAND_POWERDOWN );
  	}
  	printk(KERN_INFO "Arlan driver %s\n", arlan_version);
  	ARLAN_DEBUG_EXIT("init_module");
  	return 0;
  }
  
  
  void cleanup_module(void)
  {
  	int i = 0;
  
  	ARLAN_DEBUG_ENTRY("cleanup_module");
  
  	IFDEBUG(ARLAN_DEBUG_SHUTDOWN)
  		printk(KERN_INFO "arlan: unloading module\n");
  	for (i = 0; i < MAX_ARLANS; i++)
  	{
  		if (arlan_device[i])
  		{
  			arlan_command(arlan_device[i], ARLAN_COMMAND_POWERDOWN );
  
  //			release_mem_region(virt_to_phys(arlan_device[i]->mem_start), 0x2000 );
  			unregister_netdev(arlan_device[i]);
  			if (arlan_device[i]->priv)
  			{
  				if (((struct arlan_private *) arlan_device[i]->priv)->conf)
  					kfree(((struct arlan_private *) arlan_device[i]->priv)->conf);
  				kfree(arlan_device[i]);
  			}
  			arlan_device[i] = NULL;
  		}
  	}
  	ARLAN_DEBUG_EXIT("cleanup_module");
  }
  
  
  #endif
  