priv->stats.rx_missed_errors += missed;			}			if ((RegContent (status) & TxUnderrun)) {				priv->stats.tx_errors++;				priv->stats.tx_fifo_errors++;				priv->txlen = 0;				netif_wake_queue (dev);			}			/* FIXME: if Rdy4Tx, transmit last sent packet (if any) */			break;		case TxCOL:			priv->stats.collisions += ColCount (cs8900_read (dev,PP_TxCOL));			break;		case RxMISS:			status = MissCount (cs8900_read (dev,PP_RxMISS));			priv->stats.rx_errors += status;			priv->stats.rx_missed_errors += status;			break;		}	}	return IRQ_RETVAL(handled);}static void cs8900_transmit_timeout (struct net_device *dev){	cs8900_t *priv = (cs8900_t *) dev->priv;	priv->stats.tx_errors++;	priv->stats.tx_heartbeat_errors++;	priv->txlen = 0;	netif_wake_queue (dev);}static int cs8900_start (struct net_device *dev){	int result;#if defined(CONFIG_ARCH_SMDK2410)	set_irq_type(dev->irq, IRQT_RISING);	/* enable the ethernet controller */	cs8900_set (dev,PP_RxCFG,RxOKiE | BufferCRC | CRCerroriE | RuntiE | ExtradataiE);	cs8900_set (dev,PP_RxCTL,RxOKA | IndividualA | BroadcastA);	cs8900_set (dev,PP_TxCFG,TxOKiE | Out_of_windowiE | JabberiE);	cs8900_set (dev,PP_BufCFG,Rdy4TxiE | RxMissiE | TxUnderruniE | TxColOvfiE | MissOvfloiE);	cs8900_set (dev,PP_LineCTL,SerRxON | SerTxON);	cs8900_set (dev,PP_BusCTL,EnableRQ);#ifdef FULL_DUPLEX	cs8900_set (dev,PP_TestCTL,FDX);#endif	/* #ifdef FULL_DUPLEX */	udelay(200);		/* install interrupt handler */	if ((result = request_irq (dev->irq, &cs8900_interrupt, 0, dev->name, dev)) < 0) {		printk ("%s: could not register interrupt %d\n",dev->name, dev->irq);		return (result);	}#else		/* install interrupt handler */	if ((result = request_irq (dev->irq, &cs8900_interrupt, 0, dev->name, dev)) < 0) {		printk ("%s: could not register interrupt %d\n",dev->name, dev->irq);		return (result);	}	set_irq_type(dev->irq, IRQT_RISING);	/* enable the ethernet controller */	cs8900_set (dev,PP_RxCFG,RxOKiE | BufferCRC | CRCerroriE | RuntiE | ExtradataiE);	cs8900_set (dev,PP_RxCTL,RxOKA | IndividualA | BroadcastA);	cs8900_set (dev,PP_TxCFG,TxOKiE | Out_of_windowiE | JabberiE);	cs8900_set (dev,PP_BufCFG,Rdy4TxiE | RxMissiE | TxUnderruniE | TxColOvfiE | MissOvfloiE);	cs8900_set (dev,PP_LineCTL,SerRxON | SerTxON);	cs8900_set (dev,PP_BusCTL,EnableRQ);#ifdef FULL_DUPLEX	cs8900_set (dev,PP_TestCTL,FDX);#endif	/* #ifdef FULL_DUPLEX */	#endif /* #if defined(CONFIG_ARCH_SMDK2410) */	/* start the queue */	netif_start_queue (dev);	return (0);}static int cs8900_stop (struct net_device *dev){	/* disable ethernet controller */	cs8900_write (dev,PP_BusCTL,0);	cs8900_write (dev,PP_TestCTL,0);	cs8900_write (dev,PP_SelfCTL,0);	cs8900_write (dev,PP_LineCTL,0);	cs8900_write (dev,PP_BufCFG,0);	cs8900_write (dev,PP_TxCFG,0);	cs8900_write (dev,PP_RxCTL,0);	cs8900_write (dev,PP_RxCFG,0);	/* uninstall interrupt handler */	free_irq (dev->irq,dev);	/* stop the queue */	netif_stop_queue (dev);	return (0);}static struct net_device_stats *cs8900_get_stats (struct net_device *dev){	cs8900_t *priv = (cs8900_t *) dev->priv;	return (&priv->stats);}static void cs8900_set_receive_mode (struct net_device *dev){	if ((dev->flags & IFF_PROMISC))		cs8900_set (dev,PP_RxCTL,PromiscuousA);	else		cs8900_clear (dev,PP_RxCTL,PromiscuousA);	if ((dev->flags & IFF_ALLMULTI) && dev->mc_list)		cs8900_set (dev,PP_RxCTL,MulticastA);	else		cs8900_clear (dev,PP_RxCTL,MulticastA);}static int cs8900_eeprom (struct net_device *dev){	cs8900_t *priv = (cs8900_t *) dev->priv;	int i;	/* SMDK2410 CS8900A without EEPROM at all */#if defined(CONFIG_ARCH_SMDK2410)	return (-ENODEV);#endif #ifdef DEBUG	eepromdump (dev);#endif	if( (cs8900_read( dev, PP_SelfST) & EEPROMpresent) == 0)	{		/* no eeprom */		return (-ENODEV);	}	/* add character device for easy eeprom programming */	if( (priv->char_devnum=register_chrdev(0,"cs8900_eeprom",&cs8900_eeprom_fops)) != 0)		printk (KERN_INFO "%s: Registered cs8900_eeprom char device (major #%d)\n",			dev->name, priv->char_devnum);	else		printk (KERN_WARNING "%s: Failed to register char device cs8900_eeprom\n",dev->name);	if( (cs8900_read( dev, PP_SelfST) & EEPROMOK) == 0) 	{		/* bad checksum, invalid config block */		return (-EFAULT);	}	/* If we get here, the chip will have initialized the registers	 * that were specified in the eeprom configuration block	 * We assume this is at least the mac address.	 */	for (i = 0; i < ETH_ALEN; i += 2)	{		u16 mac = cs8900_read (dev,PP_IA + i);		dev->dev_addr[i] = mac & 0xff;		dev->dev_addr[i+1] = (mac>>8) & 0xff;	}	return (0);}/* * EEPROM Charater device */static int cs8900_eeprom_fopen(struct inode *inode, struct file *file){	u16 i;	for( i=0; i<MAX_EEPROM_SIZE/2; i++)	{		cs8900_eeprom_read( &cs8900_dev, &cs8900_eeprom_cache[i],i);	}	return 0;}static int cs8900_eeprom_frelease(struct inode *inode, struct file *file){	return 0;}static loff_t cs8900_eeprom_fllseek(struct file * file,loff_t offset, int whence){	long newpos;	switch(whence)	{		case 0: /* SEEK_SET */			newpos = offset;			break;		case 1: /* SEEK_CUR */			newpos = file->f_pos + offset;			break;		case 2: /* SEEK_END */			newpos = (MAX_EEPROM_SIZE-1) - offset;			break;		default: /* can't happen */			return -EINVAL;	}	if( (newpos<0) || (newpos>=MAX_EEPROM_SIZE)) return -EINVAL;	file->f_pos = newpos;	return newpos;}static ssize_t cs8900_eeprom_fread(struct file *file, char *buf, size_t count, loff_t *f_pos){	unsigned char *temp = (unsigned char *)cs8900_eeprom_cache;        if (*f_pos >= MAX_EEPROM_SIZE)                return 0;        if (*f_pos + count > MAX_EEPROM_SIZE)            count = MAX_EEPROM_SIZE - *f_pos;        if (count<1)                return 0;        if (copy_to_user(buf, &temp[*f_pos], count)){                return -EFAULT;        }        *f_pos += count;        return count;}static ssize_t cs8900_eeprom_fwrite(struct file *file, const char *buf, size_t count, loff_t *f_pos){	u16 i;	unsigned char *temp = (unsigned char *)cs8900_eeprom_cache;        if (*f_pos >= MAX_EEPROM_SIZE)                return 0;        if (*f_pos + count > MAX_EEPROM_SIZE)            count = MAX_EEPROM_SIZE - *f_pos;        if (count<1)                return 0;	/* FIXME: lock critical section */	/* update the cache */        if (copy_from_user(&temp[*f_pos], buf, count)){                return -EFAULT;        }	/* not concerned about performance, so write the entire thing */	for( i=0; i<MAX_EEPROM_SIZE/2; i++)	{		cs8900_eeprom_write( &cs8900_dev, &cs8900_eeprom_cache[i],i);	}        *f_pos += count;        return count;}/* * Architecture dependant code */#ifdef CONFIG_SA1100_FRODOstatic void frodo_reset (struct net_device *dev){	int i;	volatile u16 value;	/* reset ethernet controller */	FRODO_CPLD_ETHERNET |= FRODO_ETH_RESET;	mdelay (50);	FRODO_CPLD_ETHERNET &= ~FRODO_ETH_RESET;	mdelay (50);	/* we tied SBHE to CHIPSEL, so each memory access ensure the chip is in 16-bit mode */	for (i = 0; i < 3; i++) value = cs8900_read (dev,0);	/* FIXME: poll status bit */}#endif	/* #ifdef CONFIG_SA1100_FRODO *//* * Driver initialization routines */int __init cs8900_probe (struct net_device *dev){	static cs8900_t priv;	int i,result;	u16 value;	printk (VERSION_STRING"\n");	memset (&priv,0,sizeof (cs8900_t));	ether_setup (dev);	dev->open               = cs8900_start;	dev->stop               = cs8900_stop;	dev->hard_start_xmit    = cs8900_send_start;	dev->get_stats          = cs8900_get_stats;	dev->set_multicast_list = cs8900_set_receive_mode;	dev->tx_timeout         = cs8900_transmit_timeout;	dev->watchdog_timeo     = HZ;#if defined(CONFIG_ARCH_SMDK2410)	dev->dev_addr[0] = 0x08;	dev->dev_addr[1] = 0x00;	dev->dev_addr[2] = 0x3e;	dev->dev_addr[3] = 0x26;	dev->dev_addr[4] = 0x0a;	dev->dev_addr[5] = 0x5b;#else	dev->dev_addr[0] = 0x00;    dev->dev_addr[1] = 0x12;    dev->dev_addr[2] = 0x34;    dev->dev_addr[3] = 0x56;    dev->dev_addr[4] = 0x78;    dev->dev_addr[5] = 0x9a;#endif	dev->if_port   = IF_PORT_10BASET;	dev->priv      = (void *) &priv;	spin_lock_init(&priv.lock);	SET_MODULE_OWNER (dev);#ifdef CONFIG_SA1100_FRODO	dev->base_addr = FRODO_ETH_IO + 0x300;	dev->irq = FRODO_ETH_IRQ;	frodo_reset (dev);#endif	/* #ifdef CONFIG_SA1100_FRODO */#if defined(CONFIG_SA1100_CERF)	dev->base_addr = CERF_ETH_IO + 0x300;	dev->irq = CERF_ETH_IRQ;#endif /* #if defined(CONFIG_SA1100_CERF) */#if defined(CONFIG_ARCH_SMDK2410)	dev->base_addr = vSMDK2410_ETH_IO + 0x300;	dev->irq = SMDK2410_ETH_IRQ;#endif /* #if defined(CONFIG_ARCH_SMDK2410) */ 	if ((result = check_mem_region (dev->base_addr, 16))) {		printk (KERN_ERR "%s: can't get I/O port address 0x%lx\n",dev->name,dev->base_addr);		return (result);	}	request_mem_region (dev->base_addr, 16, dev->name);		/* verify EISA registration number for Cirrus Logic */	if ((value = cs8900_read (dev,PP_ProductID)) != EISA_REG_CODE) {		printk (KERN_ERR "%s: incorrect signature 0x%.4x\n",dev->name,value);		return (-ENXIO);	}	/* verify chip version */	value = cs8900_read (dev,PP_ProductID + 2);	if (VERSION (value) != CS8900A) {		printk (KERN_ERR "%s: unknown chip version 0x%.8x\n",dev->name,VERSION (value));		return (-ENXIO);	}	/* setup interrupt number */	cs8900_write (dev,PP_IntNum,0);	/* If an EEPROM is present, use it's MAC address. A valid EEPROM will 	 * initialize the registers automatically.	 */	result = cs8900_eeprom (dev);	printk (KERN_INFO "%s: CS8900A rev %c at %#lx irq=%d",		dev->name,'B' + REVISION (value) - REV_B, dev->base_addr, dev->irq);	if (result == -ENODEV) {		/* no eeprom or invalid config block, configure MAC address by hand */		for (i = 0; i < ETH_ALEN; i += 2)			cs8900_write (dev,PP_IA + i,dev->dev_addr[i] | (dev->dev_addr[i + 1] << 8));		printk (", no eeprom ");	}	else if( result == -EFAULT)	{#if defined(CONFIG_SA1100_CERF)	    /* The default eeprom layout doesn't follow the cs8900 layout 		 * that enables automatic cs8900 initialization. Doh!		 * Read the mac address manually.		 */		u16 MAC_addr[3] = {0, 0, 0};		if (cs8900_eeprom_read(dev, &MAC_addr[0], 0x1c) == -1)			printk("\ncs8900: [CERF] EEPROM[0] read failed\n");		if (cs8900_eeprom_read(dev, &MAC_addr[1], 0x1d) == -1)			printk("\ncs8900: [CERF] EEPROM[1] read failed\n");		if (cs8900_eeprom_read(dev, &MAC_addr[2], 0x1e) == -1)			printk("\ncs8900: [CERF] EEPROM[2] read failed\n");		for (i = 0; i < ETH_ALEN / 2; i++)		{			dev->dev_addr[i*2]	= MAC_addr[i] & 0xff;			dev->dev_addr[i*2+1]	= (MAC_addr[i] >> 8) & 0xff;			cs8900_write (dev,PP_IA + i*2,dev->dev_addr[i*2] | (dev->dev_addr[i*2 + 1] << 8));		}		printk (", eeprom (smdk2410 layout)");#else		printk (", eeprom (invalid config block)");#endif /* #if defined(CONFIG_SA1100_CERF) */	}	else	{		printk (", eeprom ok");	}	printk (", addr:");	for (i = 0; i < ETH_ALEN; i += 2)	{		u16 mac = cs8900_read (dev,PP_IA + i);		printk ("%c%02X:%2X", (i==0)?' ':':', mac & 0xff, (mac >> 8));	}	printk ("\n");	return (0);}static int __init cs8900_init (void){	strcpy(cs8900_dev.name, "eth%d");	return (register_netdev (&cs8900_dev));}static void __exit cs8900_cleanup (void){	cs8900_t *priv = (cs8900_t *) cs8900_dev.priv;	if( priv->char_devnum)	{		unregister_chrdev(priv->char_devnum,"cs8900_eeprom");	}	release_mem_region (cs8900_dev.base_addr,16);	unregister_netdev (&cs8900_dev);}MODULE_AUTHOR ("Abraham van der Merwe <abraham at 2d3d.co.za>");MODULE_DESCRIPTION (VERSION_STRING);MODULE_LICENSE ("GPL");module_init (cs8900_init);module_exit (cs8900_cleanup);