Exemplo n.º 1
0
static int com90xx_reset(struct net_device *dev, int really_reset)
{
	struct arcnet_local *lp = netdev_priv(dev);
	short ioaddr = dev->base_addr;

	BUGMSG(D_INIT, "Resetting (status=%02Xh)\n", ASTATUS());

	if (really_reset) {
		
		inb(_RESET);
		mdelay(RESETtime);
	}
	ACOMMAND(CFLAGScmd | RESETclear);	
	ACOMMAND(CFLAGScmd | CONFIGclear);

	
	

	
	if (readb(lp->mem_start) != TESTvalue) {
		if (really_reset)
			BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
		return 1;
	}
	
	ACOMMAND(CONFIGcmd | EXTconf);

	
	BUGLVL(D_DURING)
	    memset_io(lp->mem_start, 0x42, 2048);

	
	return 0;
}
Exemplo n.º 2
0
/*
 * Do a hardware reset on the card, and set up necessary registers.
 *
 * This should be called as little as possible, because it disrupts the
 * token on the network (causes a RECON) and requires a significant delay.
 *
 * However, it does make sure the card is in a defined state.
 */
static int com90io_reset(struct net_device *dev, int really_reset)
{
	struct arcnet_local *lp = netdev_priv(dev);
	short ioaddr = dev->base_addr;

	BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS());

	if (really_reset) {
		/* reset the card */
		inb(_RESET);
		mdelay(RESETtime);
	}
	/* Set the thing to IO-mapped, 8-bit  mode */
	lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag;
	SETCONF();

	ACOMMAND(CFLAGScmd | RESETclear);	/* clear flags & end reset */
	ACOMMAND(CFLAGScmd | CONFIGclear);

	/* verify that the ARCnet signature byte is present */
	if (get_buffer_byte(dev, 0) != TESTvalue) {
		BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
		return 1;
	}
	/* enable extended (512-byte) packets */
	ACOMMAND(CONFIGcmd | EXTconf);

	/* done!  return success. */
	return 0;
}
Exemplo n.º 3
0
static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
		      int bufnum)
{
	struct arcnet_local *lp = dev->priv;
	struct arc_hardware *hard = &pkt->hard;
	int ofs;

	BUGMSG(D_DURING, "prepare_tx: txbufs=%d/%d/%d\n",
	       lp->next_tx, lp->cur_tx, bufnum);

	length -= ARC_HDR_SIZE;	/* hard header is not included in packet length */

	if (length > XMTU) {
		/* should never happen! other people already check for this. */
		BUGMSG(D_NORMAL, "Bug!  prepare_tx with size %d (> %d)\n",
		       length, XMTU);
		length = XMTU;
	}
	if (length > MinTU) {
		hard->offset[0] = 0;
		hard->offset[1] = ofs = 512 - length;
	} else if (length > MTU) {
		hard->offset[0] = 0;
		hard->offset[1] = ofs = 512 - length - 3;
	} else
		hard->offset[0] = ofs = 256 - length;

	lp->hw.copy_to_card(dev, bufnum, 0, hard, ARC_HDR_SIZE);
	lp->hw.copy_to_card(dev, bufnum, ofs, &pkt->soft, length);

	lp->lastload_dest = hard->dest;

	return 1;		/* done */
}
Exemplo n.º 4
0
/*
 * Do a hardware reset on the card, and set up necessary registers.
 *
 * This should be called as little as possible, because it disrupts the
 * token on the network (causes a RECON) and requires a significant delay.
 *
 * However, it does make sure the card is in a defined state.
 */
static int com90xx_reset(struct net_device *dev, int really_reset)
{
	struct arcnet_local *lp = netdev_priv(dev);
	short ioaddr = dev->base_addr;

	BUGMSG(D_INIT, "Resetting (status=%02Xh)\n", ASTATUS());

	if (really_reset) {
		/* reset the card */
		inb(_RESET);
		mdelay(RESETtime);
	}
	ACOMMAND(CFLAGScmd | RESETclear);	/* clear flags & end reset */
	ACOMMAND(CFLAGScmd | CONFIGclear);

	/* don't do this until we verify that it doesn't hurt older cards! */
	/* outb(inb(_CONFIG) | ENABLE16flag, _CONFIG); */

	/* verify that the ARCnet signature byte is present */
	if (readb(lp->mem_start) != TESTvalue) {
		if (really_reset)
			BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
		return 1;
	}
	/* enable extended (512-byte) packets */
	ACOMMAND(CONFIGcmd | EXTconf);

	/* clean out all the memory to make debugging make more sense :) */
	BUGLVL(D_DURING)
	    memset_io(lp->mem_start, 0x42, 2048);

	/* done!  return success. */
	return 0;
}
Exemplo n.º 5
0
/*
 * We cannot probe for a RIM I card; one reason is I don't know how to reset
 * them.  In fact, we can't even get their node ID automatically.  So, we
 * need to be passed a specific shmem address, IRQ, and node ID.
 */
static int __init arcrimi_probe(struct net_device *dev)
{
	BUGLVL(D_NORMAL) printk(VERSION);
	BUGLVL(D_NORMAL) printk("E-mail me if you actually test the RIM I driver, please!\n");

	BUGMSG(D_NORMAL, "Given: node %02Xh, shmem %lXh, irq %d\n",
	       dev->dev_addr[0], dev->mem_start, dev->irq);

	if (dev->mem_start <= 0 || dev->irq <= 0) {
		BUGMSG(D_NORMAL, "No autoprobe for RIM I; you "
		       "must specify the shmem and irq!\n");
		return -ENODEV;
	}
	if (dev->dev_addr[0] == 0) {
		BUGMSG(D_NORMAL, "You need to specify your card's station "
		       "ID!\n");
		return -ENODEV;
	}
	/*
	 * Grab the memory region at mem_start for MIRROR_SIZE bytes.
	 * Later in arcrimi_found() the real size will be determined
	 * and this reserve will be released and the correct size
	 * will be taken.
	 */
	if (!request_mem_region(dev->mem_start, MIRROR_SIZE, "arcnet (90xx)")) {
		BUGMSG(D_NORMAL, "Card memory already allocated\n");
		return -ENODEV;
	}
	return arcrimi_found(dev);
}
Exemplo n.º 6
0
static int __devinit com20020pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct net_device *dev;
	struct arcnet_local *lp;
	int ioaddr, err;

	if (pci_enable_device(pdev))
		return -EIO;
	dev = dev_alloc(device ? : "arc%d", &err);
	if (!dev)
		return err;
	lp = dev->priv = kmalloc(sizeof(struct arcnet_local), GFP_KERNEL);
	if (!lp) {
		err = -ENOMEM;
		goto out_dev;
	}
	memset(lp, 0, sizeof(struct arcnet_local));
	pci_set_drvdata(pdev, dev);

	ioaddr = pci_resource_start(pdev, 2);
	dev->base_addr = ioaddr;
	dev->irq = pdev->irq;
	dev->dev_addr[0] = node;
	lp->card_name = pdev->name;
	lp->card_flags = id->driver_data;
	lp->backplane = backplane;
	lp->clockp = clockp & 7;
	lp->clockm = clockm & 3;
	lp->timeout = timeout;
	lp->hw.open_close_ll = com20020pci_open_close;

	if (check_region(ioaddr, ARCNET_TOTAL_SIZE)) {
		BUGMSG(D_INIT, "IO region %xh-%xh already allocated.\n",
		       ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
		err = -EBUSY;
		goto out_priv;
	}
	if (ASTATUS() == 0xFF) {
		BUGMSG(D_NORMAL, "IO address %Xh was reported by PCI BIOS, "
		       "but seems empty!\n", ioaddr);
		err = -EIO;
		goto out_priv;
	}
	if (com20020_check(dev)) {
		err = -EIO;
		goto out_priv;
	}

	if ((err = com20020_found(dev, SA_SHIRQ)) != 0)
	        goto out_priv;

	return 0;

out_priv:
	kfree(dev->priv);
out_dev:
	kfree(dev);
	return err;
}
/*
 * Open/initialize the board. This is called (in the current kernel)
 * sometime after booting when the 'ifconfig' program is run.
 *
 * This routine should set everything up anew at each open, even
 * registers that "should" only need to be set once at boot, so that
 * there is non-reboot way to recover if something goes wrong.
 */
static int
net_open(struct net_device *dev)
{
	struct net_local *lp = (struct net_local *)dev->priv;
	struct sk_buff *skb;
	int irqval;
	int i;

	MOD_INC_USE_COUNT;

	/* For now we always do Eth1 */
	lp->uEth = uETH1;

	BUGMSG("%s:Opening Ethernet interface ", dev->name);
	if(lp->uEth == uETH1) {
		BUGMSG("1\n");
		dev->irq = IRQ_ETH1;
	} else {
		BUGMSG("2\n");
		dev->irq = IRQ_ETH2;
	}
	irqval = request_irq(dev->irq, &net_interrupt, SA_INTERRUPT, cardname, NULL);

	if (irqval) {
		printk("%s: unable to get IRQ %d (irqval=%d).\n",
			   dev->name, dev->irq, irqval);
		return -EAGAIN;
	}

	/* Allocate Ethernet RX buffers */
	for( i = 0; i < ETH_RXQ_SIZE; i++ ) {
		skb = dev_alloc_skb( PKT_BUF_SZ );
		if (skb == NULL) {
			printk("%s: Could not allocate RX Ring buffer\n", dev->name);
			while(i != 0)
				dev_kfree_skb(lp->rx_frames[--i]);

			return -ENOMEM;
		}
		skb->dev = dev;
		skb->protocol = eth_type_trans(skb, dev);
		skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
		/* word align IP header */
		skb_reserve( skb, 2 );
    		lp->rx_frames[i] = skb;
	}
	lp->rxq_ptr = 0;
	lp->txq_p = 0;
	lp->txq_c = 0;

	BUGMSG("%s: Resetting hardware\n", dev->name);
	/* Reset the hardware here. */
	chipset_init( dev, 1 );
	lp->open_time = jiffies;

	BUGMSG("%s: netif_start_queue\n", dev->name);
	netif_start_queue(dev);
	return 0;
}
Exemplo n.º 8
0
/* packet receiver */
static void rx(struct net_device *dev, int bufnum,
	       struct archdr *pkthdr, int length)
{
	struct arcnet_local *lp = (struct arcnet_local *) dev->priv;
	struct sk_buff *skb;
	struct archdr *pkt = pkthdr;
	char *pktbuf, *pkthdrbuf;
	int ofs;

	BUGMSG(D_DURING, "it's a raw(cap) packet (length=%d)\n", length);

	if (length >= MinTU)
		ofs = 512 - length;
	else
		ofs = 256 - length;

	skb = alloc_skb(length + ARC_HDR_SIZE + sizeof(int), GFP_ATOMIC);
	if (skb == NULL) {
		BUGMSG(D_NORMAL, "Memory squeeze, dropping packet.\n");
		lp->stats.rx_dropped++;
		return;
	}
	skb_put(skb, length + ARC_HDR_SIZE + sizeof(int));
	skb->dev = dev;

	pkt = (struct archdr *) skb->data;

	skb->mac.raw = skb->data;
	skb_pull(skb, ARC_HDR_SIZE);

	/* up to sizeof(pkt->soft) has already been copied from the card */
	/* squeeze in an int for the cap encapsulation */

	/* use these variables to be sure we count in bytes, not in
	   sizeof(struct archdr) */
	pktbuf=(char*)pkt;
	pkthdrbuf=(char*)pkthdr;
	memcpy(pktbuf, pkthdrbuf, ARC_HDR_SIZE+sizeof(pkt->soft.cap.proto));
	memcpy(pktbuf+ARC_HDR_SIZE+sizeof(pkt->soft.cap.proto)+sizeof(int),
	       pkthdrbuf+ARC_HDR_SIZE+sizeof(pkt->soft.cap.proto),
	       sizeof(struct archdr)-ARC_HDR_SIZE-sizeof(pkt->soft.cap.proto));

	if (length > sizeof(pkt->soft))
		lp->hw.copy_from_card(dev, bufnum, ofs + sizeof(pkt->soft),
				      pkt->soft.raw + sizeof(pkt->soft)
				      + sizeof(int),
				      length - sizeof(pkt->soft));

	BUGLVL(D_SKB) arcnet_dump_skb(dev, skb, "rx");

	skb->protocol = __constant_htons(ETH_P_ARCNET);
;
	netif_rx(skb);
	dev->last_rx = jiffies;
}
Exemplo n.º 9
0
static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
		      int bufnum)
{
	struct arcnet_local *lp = netdev_priv(dev);
	struct arc_hardware *hard = &pkt->hard;
	int ofs;


	/* hard header is not included in packet length */
	length -= ARC_HDR_SIZE;
	/* And neither is the cookie field */
	length -= sizeof(int);

	BUGMSG(D_DURING, "prepare_tx: txbufs=%d/%d/%d\n",
	       lp->next_tx, lp->cur_tx, bufnum);

	BUGMSG(D_PROTO, "Sending for cap packet %x.\n",
	       *((int*)&pkt->soft.cap.cookie[0]));

	if (length > XMTU) {
		/* should never happen! other people already check for this. */
		BUGMSG(D_NORMAL, "Bug!  prepare_tx with size %d (> %d)\n",
		       length, XMTU);
		length = XMTU;
	}
	if (length > MinTU) {
		hard->offset[0] = 0;
		hard->offset[1] = ofs = 512 - length;
	} else if (length > MTU) {
		hard->offset[0] = 0;
		hard->offset[1] = ofs = 512 - length - 3;
	} else
		hard->offset[0] = ofs = 256 - length;

	BUGMSG(D_DURING, "prepare_tx: length=%d ofs=%d\n",
	       length,ofs);

	// Copy the arcnet-header + the protocol byte down:
	lp->hw.copy_to_card(dev, bufnum, 0, hard, ARC_HDR_SIZE);
	lp->hw.copy_to_card(dev, bufnum, ofs, &pkt->soft.cap.proto,
			    sizeof(pkt->soft.cap.proto));

	// Skip the extra integer we have written into it as a cookie
	// but write the rest of the message:
	lp->hw.copy_to_card(dev, bufnum, ofs+1,
			    ((unsigned char*)&pkt->soft.cap.mes),length-1);

	lp->lastload_dest = hard->dest;

	return 1;		/* done */
}
Exemplo n.º 10
0
static void rx(struct net_device *dev, int bufnum,
	       struct archdr *pkthdr, int length)
{
	struct arcnet_local *lp = netdev_priv(dev);
	struct sk_buff *skb;
	struct archdr *pkt = pkthdr;
	char *pktbuf, *pkthdrbuf;
	int ofs;

	BUGMSG(D_DURING, "it's a raw(cap) packet (length=%d)\n", length);

	if (length >= MinTU)
		ofs = 512 - length;
	else
		ofs = 256 - length;

	skb = alloc_skb(length + ARC_HDR_SIZE + sizeof(int), GFP_ATOMIC);
	if (skb == NULL) {
		BUGMSG(D_NORMAL, "Memory squeeze, dropping packet.\n");
		dev->stats.rx_dropped++;
		return;
	}
	skb_put(skb, length + ARC_HDR_SIZE + sizeof(int));
	skb->dev = dev;
	skb_reset_mac_header(skb);
	pkt = (struct archdr *)skb_mac_header(skb);
	skb_pull(skb, ARC_HDR_SIZE);

	/*                                                               */
	/*                                             */

	/*                                                         
                          */
	pktbuf=(char*)pkt;
	pkthdrbuf=(char*)pkthdr;
	memcpy(pktbuf, pkthdrbuf, ARC_HDR_SIZE+sizeof(pkt->soft.cap.proto));
	memcpy(pktbuf+ARC_HDR_SIZE+sizeof(pkt->soft.cap.proto)+sizeof(int),
	       pkthdrbuf+ARC_HDR_SIZE+sizeof(pkt->soft.cap.proto),
	       sizeof(struct archdr)-ARC_HDR_SIZE-sizeof(pkt->soft.cap.proto));

	if (length > sizeof(pkt->soft))
		lp->hw.copy_from_card(dev, bufnum, ofs + sizeof(pkt->soft),
				      pkt->soft.raw + sizeof(pkt->soft)
				      + sizeof(int),
				      length - sizeof(pkt->soft));

	BUGLVL(D_SKB) arcnet_dump_skb(dev, skb, "rx");

	skb->protocol = cpu_to_be16(ETH_P_ARCNET);
	netif_rx(skb);
}
Exemplo n.º 11
0
static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
		      int bufnum)
{
	struct arcnet_local *lp = netdev_priv(dev);
	struct arc_hardware *hard = &pkt->hard;
	int ofs;


	/*                                              */
	length -= ARC_HDR_SIZE;
	/*                                 */
	length -= sizeof(int);

	BUGMSG(D_DURING, "prepare_tx: txbufs=%d/%d/%d\n",
	       lp->next_tx, lp->cur_tx, bufnum);

	BUGMSG(D_PROTO, "Sending for cap packet %x.\n",
	       *((int*)&pkt->soft.cap.cookie[0]));

	if (length > XMTU) {
		/*                                                           */
		BUGMSG(D_NORMAL, "Bug!  prepare_tx with size %d (> %d)\n",
		       length, XMTU);
		length = XMTU;
	}
	if (length > MinTU) {
		hard->offset[0] = 0;
		hard->offset[1] = ofs = 512 - length;
	} else if (length > MTU) {
		hard->offset[0] = 0;
		hard->offset[1] = ofs = 512 - length - 3;
	} else
		hard->offset[0] = ofs = 256 - length;

	BUGMSG(D_DURING, "prepare_tx: length=%d ofs=%d\n",
	       length,ofs);

	/*                                                  */
	lp->hw.copy_to_card(dev, bufnum, 0, hard, ARC_HDR_SIZE);
	lp->hw.copy_to_card(dev, bufnum, ofs, &pkt->soft.cap.proto,
			    sizeof(pkt->soft.cap.proto));

	/*                                                           
                                       */
	lp->hw.copy_to_card(dev, bufnum, ofs+1,
			    ((unsigned char*)&pkt->soft.cap.mes),length-1);

	lp->lastload_dest = hard->dest;

	return 1;	/*      */
}
Exemplo n.º 12
0
static int build_header(struct sk_buff *skb,
			struct net_device *dev,
			unsigned short type,
			uint8_t daddr)
{
	int hdr_size = ARC_HDR_SIZE;
	struct archdr *pkt = (struct archdr *) skb_push(skb, hdr_size);

	BUGMSG(D_PROTO, "Preparing header for cap packet %x.\n",
	       *((int*)&pkt->soft.cap.cookie[0]));
	/*
                                    
   
                                                                  
                                                                        
                           
  */
	pkt->hard.source = *dev->dev_addr;

	/*                                                               */

	if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
		/*
                                                                   
                                         
   */
		pkt->hard.dest = 0;
		return hdr_size;
	}
	/*                                    */
	pkt->hard.dest = daddr;

	return hdr_size;	/*         */
}
Exemplo n.º 13
0
/*
 * Create the ARCnet hard/soft headers for cap mode.
 * There aren't any soft headers in cap mode - not even the protocol id.
 */
static int build_header(struct sk_buff *skb,
			struct net_device *dev,
			unsigned short type,
			uint8_t daddr)
{
	int hdr_size = ARC_HDR_SIZE;
	struct archdr *pkt = (struct archdr *) skb_push(skb, hdr_size);

	BUGMSG(D_PROTO, "Preparing header for cap packet %x.\n",
	       *((int*)&pkt->soft.cap.cookie[0]));
	/*
	 * Set the source hardware address.
	 *
	 * This is pretty pointless for most purposes, but it can help in
	 * debugging.  ARCnet does not allow us to change the source address in
	 * the actual packet sent)
	 */
	pkt->hard.source = *dev->dev_addr;

	/* see linux/net/ethernet/eth.c to see where I got the following */

	if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
		/*
		 * FIXME: fill in the last byte of the dest ipaddr here to better
		 * comply with RFC1051 in "noarp" mode.
		 */
		pkt->hard.dest = 0;
		return hdr_size;
	}
	/* otherwise, just fill it in and go! */
	pkt->hard.dest = daddr;

	return hdr_size;	/* success */
}
Exemplo n.º 14
0
/* Set up the struct net_device associated with this card.  Called after
 * probing succeeds.
 */
static int __init com90io_found(struct net_device *dev)
{
	struct arcnet_local *lp;
	int ioaddr = dev->base_addr;
	int err;

	/* Reserve the irq */
	if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (COM90xx-IO)", dev)) {
		BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
		return -ENODEV;
	}
	/* Reserve the I/O region */
	if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE, "arcnet (COM90xx-IO)")) {
		free_irq(dev->irq, dev);
		return -EBUSY;
	}

	lp = netdev_priv(dev);
	lp->card_name = "COM90xx I/O";
	lp->hw.command = com90io_command;
	lp->hw.status = com90io_status;
	lp->hw.intmask = com90io_setmask;
	lp->hw.reset = com90io_reset;
	lp->hw.owner = THIS_MODULE;
	lp->hw.copy_to_card = com90io_copy_to_card;
	lp->hw.copy_from_card = com90io_copy_from_card;

	lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag;
	SETCONF();

	/* get and check the station ID from offset 1 in shmem */

	dev->dev_addr[0] = get_buffer_byte(dev, 1);

	err = register_netdev(dev);
	if (err) {
		outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
		free_irq(dev->irq, dev);
		release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
		return err;
	}

	BUGMSG(D_NORMAL, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
	       dev->dev_addr[0], dev->base_addr, dev->irq);

	return 0;
}
Exemplo n.º 15
0
static int ack_tx(struct net_device *dev, int acked)
{
  struct arcnet_local *lp = netdev_priv(dev);
  struct sk_buff *ackskb;
  struct archdr *ackpkt;
  int length=sizeof(struct arc_cap);

  BUGMSG(D_DURING, "capmode: ack_tx: protocol: %x: result: %d\n",
	 lp->outgoing.skb->protocol, acked);

  BUGLVL(D_SKB) arcnet_dump_skb(dev, lp->outgoing.skb, "ack_tx");

  /* Now alloc a skb to send back up through the layers: */
  ackskb = alloc_skb(length + ARC_HDR_SIZE , GFP_ATOMIC);
  if (ackskb == NULL) {
	  BUGMSG(D_NORMAL, "Memory squeeze, can't acknowledge.\n");
	  goto free_outskb;
  }

  skb_put(ackskb, length + ARC_HDR_SIZE );
  ackskb->dev = dev;

  skb_reset_mac_header(ackskb);
  ackpkt = (struct archdr *)skb_mac_header(ackskb);
  /* skb_pull(ackskb, ARC_HDR_SIZE); */


  skb_copy_from_linear_data(lp->outgoing.skb, ackpkt,
		ARC_HDR_SIZE + sizeof(struct arc_cap));
  ackpkt->soft.cap.proto=0; /* using protocol 0 for acknowledge */
  ackpkt->soft.cap.mes.ack=acked;

  BUGMSG(D_PROTO, "Ackknowledge for cap packet %x.\n",
	 *((int*)&ackpkt->soft.cap.cookie[0]));

  ackskb->protocol = __constant_htons(ETH_P_ARCNET);

  BUGLVL(D_SKB) arcnet_dump_skb(dev, ackskb, "ack_tx_recv");
  netif_rx(ackskb);

 free_outskb:
  dev_kfree_skb_irq(lp->outgoing.skb);
  lp->outgoing.proto = NULL; /* We are always finished when in this protocol */

  return 0;
}
/*
 * Get the current statistics.
 * This may be called with the card open or closed.
 */
static struct net_device_stats *
net_get_stats(struct net_device *dev)
{
	struct net_local *lp = (struct net_local *)dev->priv;

	BUGMSG("%s: net_get_stats\n", dev->name);
	return &lp->stats;
}
/*
 * We cannot (yet) probe for an IO mapped card, although we can check that
 * it's where we were told it was, and even do autoirq.
 */
static int __init com20020isa_probe(struct net_device *dev)
{
	int ioaddr;
	unsigned long airqmask;
	struct arcnet_local *lp = netdev_priv(dev);
	int err;

	BUGLVL(D_NORMAL) printk(VERSION);

	ioaddr = dev->base_addr;
	if (!ioaddr) {
		BUGMSG(D_NORMAL, "No autoprobe (yet) for IO mapped cards; you "
		       "must specify the base address!\n");
		return -ENODEV;
	}
	if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
		BUGMSG(D_NORMAL, "IO region %xh-%xh already allocated.\n",
		       ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
		return -ENXIO;
	}
	if (ASTATUS() == 0xFF) {
		BUGMSG(D_NORMAL, "IO address %x empty\n", ioaddr);
		err = -ENODEV;
		goto out;
	}
	if (com20020_check(dev)) {
		err = -ENODEV;
		goto out;
	}

	if (!dev->irq) {
		/* if we do this, we're sure to get an IRQ since the
		 * card has just reset and the NORXflag is on until
		 * we tell it to start receiving.
		 */
		BUGMSG(D_INIT_REASONS, "intmask was %02Xh\n", inb(_INTMASK));
		outb(0, _INTMASK);
		airqmask = probe_irq_on();
		outb(NORXflag, _INTMASK);
		udelay(1);
		outb(0, _INTMASK);
		dev->irq = probe_irq_off(airqmask);

<<<<<<< HEAD
/* The inverse routine to net_open(). */
static int
net_close(struct net_device *dev)
{
	BUGMSG("%s: net_close\n", dev->name);

	netif_stop_queue(dev); /* can't transmit any more */

	MOD_DEC_USE_COUNT;
	return 0;
}
Exemplo n.º 19
0
/* packet receiver */
static void rx(struct net_device *dev, int bufnum,
           struct archdr *pkthdr, int length)
{
    struct arcnet_local *lp = dev->priv;
    struct sk_buff *skb;
    struct archdr *pkt = pkthdr;
    int ofs;

    BUGMSG(D_DURING, "it's a raw packet (length=%d)\n", length);

    if (length > MTU)
        ofs = 512 - length;
    else
        ofs = 256 - length;

    skb = alloc_skb(length + ARC_HDR_SIZE, GFP_ATOMIC);
    if (skb == NULL) {
        BUGMSG(D_NORMAL, "Memory squeeze, dropping packet.\n");
        lp->stats.rx_dropped++;
        return;
    }
    skb_put(skb, length + ARC_HDR_SIZE);
    skb->dev = dev;

    pkt = (struct archdr *) skb->data;

    skb_reset_mac_header(skb);
    skb_pull(skb, ARC_HDR_SIZE);

    /* up to sizeof(pkt->soft) has already been copied from the card */
    memcpy(pkt, pkthdr, sizeof(struct archdr));
    if (length > sizeof(pkt->soft))
        lp->hw.copy_from_card(dev, bufnum, ofs + sizeof(pkt->soft),
                      pkt->soft.raw + sizeof(pkt->soft),
                      length - sizeof(pkt->soft));

    BUGLVL(D_SKB) arcnet_dump_skb(dev, skb, "rx");

    skb->protocol = __constant_htons(ETH_P_ARCNET);
;
    netif_rx(skb);
    dev->last_rx = jiffies;
}
Exemplo n.º 20
0
static void
arcrimi_rx(struct device *dev,int recbuf)
{
  struct arcnet_local *lp = (struct arcnet_local *)dev->priv;
  int ioaddr=dev->mem_start+0x800;
  union ArcPacket *arcpacket=
    (union ArcPacket *)phys_to_virt(dev->mem_start+recbuf*512);
  u_char *arcsoft;
  short length,offset;
  u_char daddr,saddr;

  lp->stats.rx_packets++;

  saddr=arcpacket->hardheader.source;

  /* if source is 0, it's a "used" packet! */
  if (saddr==0)
    {
      BUGMSG(D_NORMAL,"discarding old packet. (status=%Xh)\n",
	     ARCSTATUS);
      lp->stats.rx_errors++;
      return;
    }
  /* Set source address to zero to mark it as old */

  arcpacket->hardheader.source=0;

  daddr=arcpacket->hardheader.destination;

  if (arcpacket->hardheader.offset1) /* Normal Packet */
    {
      offset=arcpacket->hardheader.offset1;
      arcsoft=&arcpacket->raw[offset];
      length=256-offset;
    }
  else		/* ExtendedPacket or ExceptionPacket */
    {
      offset=arcpacket->hardheader.offset2;
      arcsoft=&arcpacket->raw[offset];

      length=512-offset;
    }

  arcnet_rx(lp, arcsoft, length, saddr, daddr);

  BUGLVL(D_RX) arcnet_dump_packet(lp->adev,arcpacket->raw,length>240,"rx");

#ifndef SLOW_XMIT_COPY
  /* clean out the page to make debugging make more sense :) */
  BUGLVL(D_DURING)
    memset((void *)arcpacket->raw,0x42,512);
#endif
}
Exemplo n.º 21
0
/*
 * We cannot (yet) probe for an IO mapped card, although we can check that
 * it's where we were told it was, and even do autoirq.
 */
static int __init com20020isa_probe(struct net_device *dev)
{
	int ioaddr;
	unsigned long airqmask;
	struct arcnet_local *lp = dev->priv;

#ifndef MODULE
	arcnet_init();
#endif

	BUGLVL(D_NORMAL) printk(VERSION);

	ioaddr = dev->base_addr;
	if (!ioaddr) {
		BUGMSG(D_NORMAL, "No autoprobe (yet) for IO mapped cards; you "
		       "must specify the base address!\n");
		return -ENODEV;
	}
	if (check_region(ioaddr, ARCNET_TOTAL_SIZE)) {
		BUGMSG(D_NORMAL, "IO region %xh-%xh already allocated.\n",
		       ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
		return -ENXIO;
	}
	if (ASTATUS() == 0xFF) {
		BUGMSG(D_NORMAL, "IO address %x empty\n", ioaddr);
		return -ENODEV;
	}
	if (com20020_check(dev))
		return -ENODEV;

	if (!dev->irq) {
		/* if we do this, we're sure to get an IRQ since the
		 * card has just reset and the NORXflag is on until
		 * we tell it to start receiving.
		 */
		BUGMSG(D_INIT_REASONS, "intmask was %02Xh\n", inb(_INTMASK));
		outb(0, _INTMASK);
		airqmask = probe_irq_on();
		outb(NORXflag, _INTMASK);
		udelay(1);
		outb(0, _INTMASK);
		dev->irq = probe_irq_off(airqmask);

		if (dev->irq <= 0) {
			BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed first time\n");
			airqmask = probe_irq_on();
			outb(NORXflag, _INTMASK);
			udelay(5);
			outb(0, _INTMASK);
			dev->irq = probe_irq_off(airqmask);
			if (dev->irq <= 0) {
				BUGMSG(D_NORMAL, "Autoprobe IRQ failed.\n");
				return -ENODEV;
			}
		}
	}

	lp->card_name = "ISA COM20020";
	return com20020_found(dev, 0);
}
Exemplo n.º 22
0
/* We cannot probe for a RIM I card; one reason is I don't know how to reset
 * them.  In fact, we can't even get their node ID automatically.  So, we
 * need to be passed a specific shmem address, IRQ, and node ID.
 */
__initfunc(int arcrimi_probe(struct device *dev))
{
  BUGLVL(D_NORMAL) printk(version);
  BUGMSG(D_NORMAL,"Given: node %02Xh, shmem %lXh, irq %d\n",
	 dev->dev_addr[0],dev->mem_start,dev->irq);

  if (dev->mem_start<=0 || dev->irq<=0)
    {
      BUGMSG(D_NORMAL,"No autoprobe for RIM I; you "
	     "must specify the shmem and irq!\n");
      return -ENODEV;
    }

  if (dev->dev_addr[0]==0)
    {
      BUGMSG(D_NORMAL,"You need to specify your card's station "
	     "ID!\n");
      return -ENODEV;
    }

  return arcrimi_found(dev,dev->dev_addr[0],dev->irq,dev->mem_start);
}
Exemplo n.º 23
0
/*
 * Create the ARCnet hard/soft headers for RFC1051.
 */
static int build_header(struct sk_buff *skb, struct net_device *dev,
			unsigned short type, uint8_t daddr)
{
	struct arcnet_local *lp = dev->priv;
	int hdr_size = ARC_HDR_SIZE + RFC1051_HDR_SIZE;
	struct archdr *pkt = (struct archdr *) skb_push(skb, hdr_size);
	struct arc_rfc1051 *soft = &pkt->soft.rfc1051;

	/* set the protocol ID according to RFC1051 */
	switch (type) {
	case ETH_P_IP:
		soft->proto = ARC_P_IP_RFC1051;
		break;
	case ETH_P_ARP:
		soft->proto = ARC_P_ARP_RFC1051;
		break;
	default:
		BUGMSG(D_NORMAL, "RFC1051: I don't understand protocol %d (%Xh)\n",
		       type, type);
		lp->stats.tx_errors++;
		lp->stats.tx_aborted_errors++;
		return 0;
	}


	/*
	 * Set the source hardware address.
	 *
	 * This is pretty pointless for most purposes, but it can help in
	 * debugging.  ARCnet does not allow us to change the source address in
	 * the actual packet sent)
	 */
	pkt->hard.source = *dev->dev_addr;

	/* see linux/net/ethernet/eth.c to see where I got the following */

	if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
		/* 
		 * FIXME: fill in the last byte of the dest ipaddr here to better
		 * comply with RFC1051 in "noarp" mode.
		 */
		pkt->hard.dest = 0;
		return hdr_size;
	}
	/* otherwise, just fill it in and go! */
	pkt->hard.dest = daddr;

	return hdr_size;	/* success */
}
static int
net_send_packet(struct sk_buff *skb, struct net_device *dev)
{
	struct net_local *lp = (struct net_local *)dev->priv;
	short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;

	BUGMSG("%s: net_send_packet p %d, c %d\n", dev->name, lp->txq_p, lp->txq_c);

	if((lp->txq_p - lp->txq_c) > (ETH_TXQ_SIZE - 1)) {
		printk("TX Queue full, dropping packet! (p %d, c %d)\n", lp->txq_p, lp->txq_c);
		dev_kfree_skb(skb);
		return 0;
	}

	/* Put packet in the Ethernet queue */
	lp->uEth->TXBCR = length;
	lp->uEth->TXADDR = (int)skb->data;

	lp->tx_frames[lp->txq_p++ & (ETH_TXQ_SIZE - 1)] = skb;
	dev->trans_start = jiffies;

	BUGMSG("%s: net_send_packet finished\n", dev->name);
	return 0;
}
Exemplo n.º 25
0
/*
 * We cannot probe for a RIM I card; one reason is I don't know how to reset
 * them.  In fact, we can't even get their node ID automatically.  So, we
 * need to be passed a specific shmem address, IRQ, and node ID.
 */
static int __init arcrimi_probe(struct net_device *dev)
{
	BUGLVL(D_NORMAL) printk(VERSION);
	BUGLVL(D_NORMAL) printk("E-mail me if you actually test the RIM I driver, please!\n");

	BUGMSG(D_NORMAL, "Given: node %02Xh, shmem %lXh, irq %d\n",
	       dev->dev_addr[0], dev->mem_start, dev->irq);

	if (dev->mem_start <= 0 || dev->irq <= 0) {
		BUGMSG(D_NORMAL, "No autoprobe for RIM I; you "
		       "must specify the shmem and irq!\n");
		return -ENODEV;
	}
	if (check_mem_region(dev->mem_start, BUFFER_SIZE)) {
		BUGMSG(D_NORMAL, "Card memory already allocated\n");
		return -ENODEV;
	}
	if (dev->dev_addr[0] == 0) {
		BUGMSG(D_NORMAL, "You need to specify your card's station "
		       "ID!\n");
		return -ENODEV;
	}
	return arcrimi_found(dev);
}
Exemplo n.º 26
0
/* Do a hardware reset on the card, and set up necessary registers.
 *
 * This should be called as little as possible, because it disrupts the
 * token on the network (causes a RECON) and requires a significant delay.
 *
 * However, it does make sure the card is in a defined state.
 */
int arcrimi_reset(struct device *dev,int reset_delay)
{
  struct arcnet_local *lp=(struct arcnet_local *)dev->priv;
  short ioaddr=dev->mem_start + 0x800;
  int recbuf=lp->recbuf;

  if (reset_delay==3)
    {
      ARCRESET;
      return 0;
    }

  /* no IRQ's, please! */
  lp->intmask=0;
  SETMASK;

  BUGMSG(D_INIT,"Resetting %s (status=%Xh)\n",
	 dev->name,ARCSTATUS);

  ACOMMAND(CFLAGScmd|RESETclear); /* clear flags & end reset */
  ACOMMAND(CFLAGScmd|CONFIGclear);

  /* clear out status variables */
  recbuf=lp->recbuf=0;
  lp->txbuf=2;

  /* enable extended (512-byte) packets */
  ACOMMAND(CONFIGcmd|EXTconf);

#ifndef SLOW_XMIT_COPY
  /* clean out all the memory to make debugging make more sense :) */
  BUGLVL(D_DURING)
    memset_io(dev->mem_start,0x42,2048);
#endif

  /* and enable receive of our first packet to the first buffer */
  EnableReceiver();

  /* re-enable interrupts */
  lp->intmask|=NORXflag;
#ifdef DETECT_RECONFIGS
  lp->intmask|=RECONflag;
#endif
  SETMASK;

  /* done!  return success. */
  return 0;
}
Exemplo n.º 27
0
/*
 * Do a hardware reset on the card, and set up necessary registers.
 *
 * This should be called as little as possible, because it disrupts the
 * token on the network (causes a RECON) and requires a significant delay.
 *
 * However, it does make sure the card is in a defined state.
 */
static int arcrimi_reset(struct net_device *dev, int really_reset)
{
	struct arcnet_local *lp = netdev_priv(dev);
	void __iomem *ioaddr = lp->mem_start + 0x800;

	BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS());

	if (really_reset) {
		writeb(TESTvalue, ioaddr - 0x800);	/* fake reset */
		return 0;
	}
	ACOMMAND(CFLAGScmd | RESETclear);	/* clear flags & end reset */
	ACOMMAND(CFLAGScmd | CONFIGclear);

	/* enable extended (512-byte) packets */
	ACOMMAND(CONFIGcmd | EXTconf);

	/* done!  return success. */
	return 0;
}
Exemplo n.º 28
0
/*
 * Set up the struct net_device associated with this card.  Called after
 * probing succeeds.
 */
static int __init arcrimi_found(struct net_device *dev)
{
	struct arcnet_local *lp;
	unsigned long first_mirror, last_mirror, shmem;
	void __iomem *p;
	int mirror_size;
	int err;

	p = ioremap(dev->mem_start, MIRROR_SIZE);
	if (!p) {
		release_mem_region(dev->mem_start, MIRROR_SIZE);
		BUGMSG(D_NORMAL, "Can't ioremap\n");
		return -ENODEV;
	}

	/* reserve the irq */
	if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
		iounmap(p);
		release_mem_region(dev->mem_start, MIRROR_SIZE);
		BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
		return -ENODEV;
	}

	shmem = dev->mem_start;
	writeb(TESTvalue, p);
	writeb(dev->dev_addr[0], p + 1);	/* actually the node ID */

	/* find the real shared memory start/end points, including mirrors */

	/* guess the actual size of one "memory mirror" - the number of
	 * bytes between copies of the shared memory.  On most cards, it's
	 * 2k (or there are no mirrors at all) but on some, it's 4k.
	 */
	mirror_size = MIRROR_SIZE;
	if (readb(p) == TESTvalue &&
	    check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
	    check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
		mirror_size = 2 * MIRROR_SIZE;

	first_mirror = shmem - mirror_size;
	while (check_mirror(first_mirror, mirror_size) == 1)
		first_mirror -= mirror_size;
	first_mirror += mirror_size;

	last_mirror = shmem + mirror_size;
	while (check_mirror(last_mirror, mirror_size) == 1)
		last_mirror += mirror_size;
	last_mirror -= mirror_size;

	dev->mem_start = first_mirror;
	dev->mem_end = last_mirror + MIRROR_SIZE - 1;

	/* initialize the rest of the device structure. */

	lp = netdev_priv(dev);
	lp->card_name = "RIM I";
	lp->hw.command = arcrimi_command;
	lp->hw.status = arcrimi_status;
	lp->hw.intmask = arcrimi_setmask;
	lp->hw.reset = arcrimi_reset;
	lp->hw.owner = THIS_MODULE;
	lp->hw.copy_to_card = arcrimi_copy_to_card;
	lp->hw.copy_from_card = arcrimi_copy_from_card;

	/*
	 * re-reserve the memory region - arcrimi_probe() alloced this reqion
	 * but didn't know the real size.  Free that region and then re-get
	 * with the correct size.  There is a VERY slim chance this could
	 * fail.
	 */
	iounmap(p);
	release_mem_region(shmem, MIRROR_SIZE);
	if (!request_mem_region(dev->mem_start,
				dev->mem_end - dev->mem_start + 1,
				"arcnet (90xx)")) {
		BUGMSG(D_NORMAL, "Card memory already allocated\n");
		goto err_free_irq;
	}

	lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	if (!lp->mem_start) {
		BUGMSG(D_NORMAL, "Can't remap device memory!\n");
		goto err_release_mem;
	}

	/* get and check the station ID from offset 1 in shmem */
	dev->dev_addr[0] = readb(lp->mem_start + 1);

	BUGMSG(D_NORMAL, "ARCnet RIM I: station %02Xh found at IRQ %d, "
	       "ShMem %lXh (%ld*%d bytes).\n",
	       dev->dev_addr[0],
	       dev->irq, dev->mem_start,
	 (dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size);

	err = register_netdev(dev);
	if (err)
		goto err_unmap;

	return 0;

err_unmap:
	iounmap(lp->mem_start);
err_release_mem:
	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
err_free_irq:
	free_irq(dev->irq, dev);
	return -EIO;
}
Exemplo n.º 29
0
/* Set up the struct device associated with this card.  Called after
 * probing succeeds.
 */
__initfunc(int arc20020_found(struct device *dev,int ioaddr,int airq))
{
  struct arcnet_local *lp;
  
  /* reserve the irq */
  if (request_irq(airq,&arcnet_interrupt,0,"arcnet (COM20020)",dev))
    {
      BUGMSG(D_NORMAL,"Can't get IRQ %d!\n",airq);
      return -ENODEV;
    }
  dev->irq=airq;
  
  /* reserve the I/O region - guaranteed to work by check_region */
  request_region(ioaddr,ARCNET_TOTAL_SIZE,"arcnet (COM20020)");
  dev->base_addr=ioaddr;
  
  dev->mem_start=dev->mem_end=dev->rmem_start=dev->rmem_end=(long)NULL;

  /* Initialize the rest of the device structure. */

  dev->priv = kmalloc(sizeof(struct arcnet_local), GFP_KERNEL);
  if (dev->priv == NULL)
    {
      free_irq(airq,dev);
      release_region(ioaddr,ARCNET_TOTAL_SIZE);
      return -ENOMEM;
    }

  memset(dev->priv,0,sizeof(struct arcnet_local));
  lp=(struct arcnet_local *)(dev->priv);
  lp->card_type = ARC_20020;
  lp->card_type_str = "COM 20020";

  lp->arcnet_reset=arc20020_reset;
  lp->asetmask=arc20020_setmask;
  lp->astatus=arc20020_status;
  lp->acommand=arc20020_command;
  lp->en_dis_able_TX=arc20020_en_dis_able_TX;
  lp->openclose_device=arc20020_openclose;
  lp->prepare_tx=arc20020_prepare_tx;
  lp->inthandler=arc20020_inthandler;

  dev->set_multicast_list = arc20020_set_mc_list;

  /* Fill in the fields of the device structure with generic
   * values.
   */
  arcnet_setup(dev);

  /* And now fill particular fields with arcnet values */
  dev->mtu=1500; /* completely arbitrary - agrees with ether, though */
  dev->hard_header_len=sizeof(struct ClientData);
  lp->sequence=1;
  lp->recbuf=0;

  BUGMSG(D_DURING,"ClientData header size is %d.\n",
	 sizeof(struct ClientData));
  BUGMSG(D_DURING,"HardHeader size is %d.\n",
	 sizeof(struct archdr));

  /* get and check the station ID from offset 1 in shmem */
  lp->timeout = dev->dev_addr[3] & 3; dev->dev_addr[3]=0;
  lp->backplane =dev->dev_addr[1] & 1; dev->dev_addr[1]=0;
  lp->setup = (dev->dev_addr[2] & 7) << 1; dev->dev_addr[2]=0;

  if (dev->dev_addr[0])
    lp->stationid=dev->dev_addr[0];
  else
    lp->stationid=inb(ioaddr+8);            /* FIX ME - We should check that
					       this is valid before using it */
  lp->config = 0x21 | (lp->timeout << 3) | (lp->backplane << 2);
  /* Default 0x38 + register: Node ID */
  SETCONF;
  outb(lp->stationid, ioaddr+7);

  REGSETUP;
  SETCONF;
  outb(lp->setup, ioaddr+7);

  if (!lp->stationid)
    BUGMSG(D_NORMAL,"WARNING!  Station address 00 is reserved "
	   "for broadcasts!\n");
  else if (lp->stationid==255)
    BUGMSG(D_NORMAL,"WARNING!  Station address FF may confuse "
	   "DOS networking programs!\n");
  dev->dev_addr[0]=lp->stationid;

  BUGMSG(D_NORMAL,"ARCnet COM20020: station %02Xh found at %03lXh, IRQ %d.\n",
	 lp->stationid, dev->base_addr,dev->irq);

  if (lp->backplane)
    BUGMSG (D_NORMAL, "Using backplane mode.\n");

  if (lp->timeout != 3)
    BUGMSG (D_NORMAL, "Using Extended Timeout value of %d.\n",lp->timeout);
  if (lp->setup)
    {
      BUGMSG (D_NORMAL, "Using CKP %d - Data rate %s.\n",
	      lp->setup >>1,clockrates[lp->setup >> 1] );
    }
Exemplo n.º 30
0
/*
 * Set up the struct net_device associated with this card.  Called after
 * probing succeeds.
 */
static int __init arcrimi_found(struct net_device *dev)
{
	struct arcnet_local *lp;
	u_long first_mirror, last_mirror, shmem;
	int mirror_size;

	/* reserve the irq */  {
		if (request_irq(dev->irq, &arcnet_interrupt, 0, "arcnet (RIM I)", dev))
			BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
		return -ENODEV;
	}

	shmem = dev->mem_start;
	isa_writeb(TESTvalue, shmem);
	isa_writeb(dev->dev_addr[0], shmem + 1);	/* actually the node ID */

	/* find the real shared memory start/end points, including mirrors */

	/* guess the actual size of one "memory mirror" - the number of
	 * bytes between copies of the shared memory.  On most cards, it's
	 * 2k (or there are no mirrors at all) but on some, it's 4k.
	 */
	mirror_size = MIRROR_SIZE;
	if (isa_readb(shmem) == TESTvalue
	    && isa_readb(shmem - mirror_size) != TESTvalue
	    && isa_readb(shmem - 2 * mirror_size) == TESTvalue)
		mirror_size *= 2;

	first_mirror = last_mirror = shmem;
	while (isa_readb(first_mirror) == TESTvalue)
		first_mirror -= mirror_size;
	first_mirror += mirror_size;

	while (isa_readb(last_mirror) == TESTvalue)
		last_mirror += mirror_size;
	last_mirror -= mirror_size;

	dev->mem_start = first_mirror;
	dev->mem_end = last_mirror + MIRROR_SIZE - 1;
	dev->rmem_start = dev->mem_start + BUFFER_SIZE * 0;
	dev->rmem_end = dev->mem_start + BUFFER_SIZE * 2 - 1;

	/* initialize the rest of the device structure. */

	lp = dev->priv = kmalloc(sizeof(struct arcnet_local), GFP_KERNEL);
	if (!lp) {
		BUGMSG(D_NORMAL, "Can't allocate device data!\n");
		goto err_free_irq;
	}
	lp->card_name = "RIM I";
	lp->hw.command = arcrimi_command;
	lp->hw.status = arcrimi_status;
	lp->hw.intmask = arcrimi_setmask;
	lp->hw.reset = arcrimi_reset;
	lp->hw.open_close = arcrimi_openclose;
	lp->hw.copy_to_card = arcrimi_copy_to_card;
	lp->hw.copy_from_card = arcrimi_copy_from_card;
	lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1);
	if (!lp->mem_start) {
		BUGMSG(D_NORMAL, "Can't remap device memory!\n");
		goto err_free_dev_priv;
	}
	/* Fill in the fields of the device structure with generic
	 * values.
	 */
	arcdev_setup(dev);

	/* get and check the station ID from offset 1 in shmem */
	dev->dev_addr[0] = readb(lp->mem_start + 1);

	/* reserve the memory region - guaranteed to work by check_region */
	request_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1, "arcnet (90xx)");

	BUGMSG(D_NORMAL, "ARCnet RIM I: station %02Xh found at IRQ %d, "
	       "ShMem %lXh (%ld*%d bytes).\n",
	       dev->dev_addr[0],
	       dev->irq, dev->mem_start,
	 (dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size);

	return 0;

      err_free_dev_priv:
	kfree(dev->priv);
      err_free_irq:
	free_irq(dev->irq, dev);
	return -EIO;
}