3c509.c

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			netif_wake_queue (dev);
		}
		if (status & (AdapterFailure | RxEarly | StatsFull | TxComplete)) {
			/* Handle all uncommon interrupts. */
			if (status & StatsFull)				/* Empty statistics. */
				update_stats(dev);
			if (status & RxEarly) {				/* Rx early is unused. */
				el3_rx(dev);
				outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
			}
			if (status & TxComplete) {			/* Really Tx error. */
				struct el3_private *lp = (struct el3_private *)dev->priv;
				short tx_status;
				int i = 4;

				while (--i>0 && (tx_status = inb(ioaddr + TX_STATUS)) > 0) {
					if (tx_status & 0x38) lp->stats.tx_aborted_errors++;
					if (tx_status & 0x30) outw(TxReset, ioaddr + EL3_CMD);
					if (tx_status & 0x3C) outw(TxEnable, ioaddr + EL3_CMD);
					outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
				}
			}
			if (status & AdapterFailure) {
				/* Adapter failure requires Rx reset and reinit. */
				outw(RxReset, ioaddr + EL3_CMD);
				/* Set the Rx filter to the current state. */
				outw(SetRxFilter | RxStation | RxBroadcast
					 | (dev->flags & IFF_ALLMULTI ? RxMulticast : 0)
					 | (dev->flags & IFF_PROMISC ? RxProm : 0),
					 ioaddr + EL3_CMD);
				outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
				outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
			}
		}

		if (--i < 0) {
			printk("%s: Infinite loop in interrupt, status %4.4x.\n",
				   dev->name, status);
			/* Clear all interrupts. */
			outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
			break;
		}
		/* Acknowledge the IRQ. */
		outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); /* Ack IRQ */
	}

	if (el3_debug > 4) {
		printk("%s: exiting interrupt, status %4.4x.\n", dev->name,
			   inw(ioaddr + EL3_STATUS));
	}
	spin_unlock(&lp->lock);
	return;
}


static struct net_device_stats *
el3_get_stats(struct net_device *dev)
{
	struct el3_private *lp = (struct el3_private *)dev->priv;
	unsigned long flags;

	/*
	 *	This is fast enough not to bother with disable IRQ
	 *	stuff.
	 */
	 
	spin_lock_irqsave(&lp->lock, flags);
	update_stats(dev);
	spin_unlock_irqrestore(&lp->lock, flags);
	return &lp->stats;
}

/*  Update statistics.  We change to register window 6, so this should be run
	single-threaded if the device is active. This is expected to be a rare
	operation, and it's simpler for the rest of the driver to assume that
	window 1 is always valid rather than use a special window-state variable.
	*/
static void update_stats(struct net_device *dev)
{
	struct el3_private *lp = (struct el3_private *)dev->priv;
	int ioaddr = dev->base_addr;

	if (el3_debug > 5)
		printk("   Updating the statistics.\n");
	/* Turn off statistics updates while reading. */
	outw(StatsDisable, ioaddr + EL3_CMD);
	/* Switch to the stats window, and read everything. */
	EL3WINDOW(6);
	lp->stats.tx_carrier_errors 	+= inb(ioaddr + 0);
	lp->stats.tx_heartbeat_errors	+= inb(ioaddr + 1);
	/* Multiple collisions. */	   inb(ioaddr + 2);
	lp->stats.collisions		+= inb(ioaddr + 3);
	lp->stats.tx_window_errors	+= inb(ioaddr + 4);
	lp->stats.rx_fifo_errors	+= inb(ioaddr + 5);
	lp->stats.tx_packets		+= inb(ioaddr + 6);
	/* Rx packets	*/		   inb(ioaddr + 7);
	/* Tx deferrals */		   inb(ioaddr + 8);
	inw(ioaddr + 10);	/* Total Rx and Tx octets. */
	inw(ioaddr + 12);

	/* Back to window 1, and turn statistics back on. */
	EL3WINDOW(1);
	outw(StatsEnable, ioaddr + EL3_CMD);
	return;
}

static int
el3_rx(struct net_device *dev)
{
	struct el3_private *lp = (struct el3_private *)dev->priv;
	int ioaddr = dev->base_addr;
	short rx_status;

	if (el3_debug > 5)
		printk("   In rx_packet(), status %4.4x, rx_status %4.4x.\n",
			   inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
	while ((rx_status = inw(ioaddr + RX_STATUS)) > 0) {
		if (rx_status & 0x4000) { /* Error, update stats. */
			short error = rx_status & 0x3800;

			outw(RxDiscard, ioaddr + EL3_CMD);
			lp->stats.rx_errors++;
			switch (error) {
			case 0x0000:		lp->stats.rx_over_errors++; break;
			case 0x0800:		lp->stats.rx_length_errors++; break;
			case 0x1000:		lp->stats.rx_frame_errors++; break;
			case 0x1800:		lp->stats.rx_length_errors++; break;
			case 0x2000:		lp->stats.rx_frame_errors++; break;
			case 0x2800:		lp->stats.rx_crc_errors++; break;
			}
		} else {
			short pkt_len = rx_status & 0x7ff;
			struct sk_buff *skb;

			skb = dev_alloc_skb(pkt_len+5);
			lp->stats.rx_bytes += pkt_len;
			if (el3_debug > 4)
				printk("Receiving packet size %d status %4.4x.\n",
					   pkt_len, rx_status);
			if (skb != NULL) {
				skb->dev = dev;
				skb_reserve(skb, 2);     /* Align IP on 16 byte */

				/* 'skb->data' points to the start of sk_buff data area. */
#ifdef  __powerpc__
				insl_unswapped(ioaddr+RX_FIFO, skb_put(skb,pkt_len),
							   (pkt_len + 3) >> 2);
#else
				insl(ioaddr + RX_FIFO, skb_put(skb,pkt_len),
					 (pkt_len + 3) >> 2);
#endif

				outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
				skb->protocol = eth_type_trans(skb,dev);
				netif_rx(skb);
				dev->last_rx = jiffies;
				lp->stats.rx_packets++;
				continue;
			}
			outw(RxDiscard, ioaddr + EL3_CMD);
			lp->stats.rx_dropped++;
			if (el3_debug)
				printk("%s: Couldn't allocate a sk_buff of size %d.\n",
					   dev->name, pkt_len);
		}
		inw(ioaddr + EL3_STATUS); 				/* Delay. */
		while (inw(ioaddr + EL3_STATUS) & 0x1000)
			printk(KERN_DEBUG "	Waiting for 3c509 to discard packet, status %x.\n",
				   inw(ioaddr + EL3_STATUS) );
	}

	return 0;
}

/*
 *     Set or clear the multicast filter for this adaptor.
 */
static void
set_multicast_list(struct net_device *dev)
{
	unsigned long flags;
	struct el3_private *lp = (struct el3_private *)dev->priv;
	int ioaddr = dev->base_addr;

	if (el3_debug > 1) {
		static int old;
		if (old != dev->mc_count) {
			old = dev->mc_count;
			printk("%s: Setting Rx mode to %d addresses.\n", dev->name, dev->mc_count);
		}
	}
	spin_lock_irqsave(&lp->lock, flags);
	if (dev->flags&IFF_PROMISC) {
		outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm,
			 ioaddr + EL3_CMD);
	}
	else if (dev->mc_count || (dev->flags&IFF_ALLMULTI)) {
		outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast, ioaddr + EL3_CMD);
	}
	else
                outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
	spin_unlock_irqrestore(&lp->lock, flags);
}

static int
el3_close(struct net_device *dev)
{
	int ioaddr = dev->base_addr;

	if (el3_debug > 2)
		printk("%s: Shutting down ethercard.\n", dev->name);

	netif_stop_queue(dev);

	/* Turn off statistics ASAP.  We update lp->stats below. */
	outw(StatsDisable, ioaddr + EL3_CMD);

	/* Disable the receiver and transmitter. */
	outw(RxDisable, ioaddr + EL3_CMD);
	outw(TxDisable, ioaddr + EL3_CMD);

	if (dev->if_port == 3)
		/* Turn off thinnet power.  Green! */
		outw(StopCoax, ioaddr + EL3_CMD);
	else if (dev->if_port == 0) {
		/* Disable link beat and jabber, if_port may change ere next open(). */
		EL3WINDOW(4);
		outw(inw(ioaddr + WN4_MEDIA) & ~MEDIA_TP, ioaddr + WN4_MEDIA);
	}

	free_irq(dev->irq, dev);
	/* Switching back to window 0 disables the IRQ. */
	EL3WINDOW(0);
	/* But we explicitly zero the IRQ line select anyway. */
	outw(0x0f00, ioaddr + WN0_IRQ);

	update_stats(dev);
	return 0;
}

/**
 * netdev_ethtool_ioctl: Handle network interface SIOCETHTOOL ioctls
 * @dev: network interface on which out-of-band action is to be performed
 * @useraddr: userspace address to which data is to be read and returned
 *
 * Process the various commands of the SIOCETHTOOL interface.
 */

static int netdev_ethtool_ioctl (struct net_device *dev, void *useraddr)
{
	u32 ethcmd;

	/* dev_ioctl() in ../../net/core/dev.c has already checked
	   capable(CAP_NET_ADMIN), so don't bother with that here.  */

	if (get_user(ethcmd, (u32 *)useraddr))
		return -EFAULT;

	switch (ethcmd) {

	case ETHTOOL_GDRVINFO: {
		struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
		strcpy (info.driver, DRV_NAME);
		strcpy (info.version, DRV_VERSION);
		if (copy_to_user (useraddr, &info, sizeof (info)))
			return -EFAULT;
		return 0;
	}

	/* get message-level */
	case ETHTOOL_GMSGLVL: {
		struct ethtool_value edata = {ETHTOOL_GMSGLVL};
		edata.data = el3_debug;
		if (copy_to_user(useraddr, &edata, sizeof(edata)))
			return -EFAULT;
		return 0;
	}
	/* set message-level */
	case ETHTOOL_SMSGLVL: {
		struct ethtool_value edata;
		if (copy_from_user(&edata, useraddr, sizeof(edata)))
			return -EFAULT;
		el3_debug = edata.data;
		return 0;
	}

	default:
		break;
	}

	return -EOPNOTSUPP;
}

/**
 * netdev_ioctl: Handle network interface ioctls
 * @dev: network interface on which out-of-band action is to be performed
 * @rq: user request data
 * @cmd: command issued by user
 *
 * Process the various out-of-band ioctls passed to this driver.
 */

static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
{
	int rc = 0;

	switch (cmd) {
	case SIOCETHTOOL:
		rc = netdev_ethtool_ioctl(dev, (void *) rq->ifr_data);
		break;

	default:
		rc = -EOPNOTSUPP;
		break;
	}

	return rc;
}
 
#ifdef MODULE
/* Parameters that may be passed into the module. */
static int debug = -1;
static int irq[] = {-1, -1, -1, -1, -1, -1, -1, -1};
static int xcvr[] = {-1, -1, -1, -1, -1, -1, -1, -1};

MODULE_PARM(debug,"i");
MODULE_PARM(irq,"1-8i");
MODULE_PARM(xcvr,"1-8i");
MODULE_PARM(max_interrupt_work, "i");
MODULE_PARM_DESC(debug, "EtherLink III debug level (0-6)");
MODULE_PARM_DESC(irq, "EtherLink III IRQ number(s) (assigned)");
MODULE_PARM_DESC(xcvr,"EtherLink III tranceiver(s) (0=internal, 1=external)");
MODULE_PARM_DESC(max_interrupt_work, "EtherLink III maximum events handled per interrupt");
#ifdef CONFIG_ISAPNP
MODULE_PARM(nopnp, "i");
MODULE_PARM_DESC(nopnp, "EtherLink III disable ISA PnP support (0-1)");
#endif	/* CONFIG_ISAPNP */

int
init_module(void)
{
	int el3_cards = 0;

	if (debug >= 0)
		el3_debug = debug;

	el3_root_dev = NULL;
	while (el3_probe(0) == 0) {
		if (irq[el3_cards] > 1)
			el3_root_dev->irq = irq[el3_cards];
		if (xcvr[el3_cards] >= 0)
			el3_root_dev->if_port = xcvr[el3_cards];
		el3_cards++;
	}

	return el3_cards ? 0 : -ENODEV;
}

void
cleanup_module(void)
{
	struct net_device *next_dev;

	/* No need to check MOD_IN_USE, as sys_delete_module() checks. */
	while (el3_root_dev) {
		struct el3_private *lp = (struct el3_private *)el3_root_dev->priv;
#ifdef CONFIG_MCA		
		if(lp->mca_slot!=-1)
			mca_mark_as_unused(lp->mca_slot);
#endif			
		next_dev = lp->next_dev;
		unregister_netdev(el3_root_dev);
		release_region(el3_root_dev->base_addr, EL3_IO_EXTENT);
		kfree(el3_root_dev);
		el3_root_dev = next_dev;
	}
}
#endif /* MODULE */

/*
 * Local variables:
 *  compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c 3c509.c"
 *  version-control: t
 *  kept-new-versions: 5
 *  tab-width: 4
 * End:
 */