pcnet_cs.c

linux-2.6.15.6

/*======================================================================

    Hard reset the card.  This used to pause for the same period that
    a 8390 reset command required, but that shouldn't be necessary.

======================================================================*/

static void pcnet_reset_8390(struct net_device *dev)
{
    kio_addr_t nic_base = dev->base_addr;
    int i;

    ei_status.txing = ei_status.dmaing = 0;

    outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);

    outb(inb(nic_base + PCNET_RESET), nic_base + PCNET_RESET);

    for (i = 0; i < 100; i++) {
	if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
	    break;
	udelay(100);
    }
    outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
    
    if (i == 100)
	printk(KERN_ERR "%s: pcnet_reset_8390() did not complete.\n",
	       dev->name);
    set_misc_reg(dev);
    
} /* pcnet_reset_8390 */

/*====================================================================*/

static int set_config(struct net_device *dev, struct ifmap *map)
{
    pcnet_dev_t *info = PRIV(dev);
    if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
	if (!(info->flags & HAS_MISC_REG))
	    return -EOPNOTSUPP;
	else if ((map->port < 1) || (map->port > 2))
	    return -EINVAL;
	dev->if_port = map->port;
	printk(KERN_INFO "%s: switched to %s port\n",
	       dev->name, if_names[dev->if_port]);
	NS8390_init(dev, 1);
    }
    return 0;
}

/*====================================================================*/

static irqreturn_t ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs)
{
    struct net_device *dev = dev_id;
    pcnet_dev_t *info;
    irqreturn_t ret = ei_interrupt(irq, dev_id, regs);

    if (ret == IRQ_HANDLED) {
	    info = PRIV(dev);
	    info->stale = 0;
    }
    return ret;
}

static void ei_watchdog(u_long arg)
{
    struct net_device *dev = (struct net_device *)arg;
    pcnet_dev_t *info = PRIV(dev);
    kio_addr_t nic_base = dev->base_addr;
    kio_addr_t mii_addr = nic_base + DLINK_GPIO;
    u_short link;

    if (!netif_device_present(dev)) goto reschedule;

    /* Check for pending interrupt with expired latency timer: with
       this, we can limp along even if the interrupt is blocked */
    outb_p(E8390_NODMA+E8390_PAGE0, nic_base + E8390_CMD);
    if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
	if (!info->fast_poll)
	    printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name);
	ei_irq_wrapper(dev->irq, dev, NULL);
	info->fast_poll = HZ;
    }
    if (info->fast_poll) {
	info->fast_poll--;
	info->watchdog.expires = jiffies + 1;
	add_timer(&info->watchdog);
	return;
    }

    if (!(info->flags & HAS_MII))
	goto reschedule;

    mdio_read(mii_addr, info->phy_id, 1);
    link = mdio_read(mii_addr, info->phy_id, 1);
    if (!link || (link == 0xffff)) {
	if (info->eth_phy) {
	    info->phy_id = info->eth_phy = 0;
	} else {
	    printk(KERN_INFO "%s: MII is missing!\n", dev->name);
	    info->flags &= ~HAS_MII;
	}
	goto reschedule;
    }

    link &= 0x0004;
    if (link != info->link_status) {
	u_short p = mdio_read(mii_addr, info->phy_id, 5);
	printk(KERN_INFO "%s: %s link beat\n", dev->name,
	       (link) ? "found" : "lost");
	if (link && (info->flags & IS_DL10022)) {
	    /* Disable collision detection on full duplex links */
	    outb((p & 0x0140) ? 4 : 0, nic_base + DLINK_DIAG);
	} else if (link && (info->flags & IS_DL10019)) {
	    /* Disable collision detection on full duplex links */
	    write_asic(dev->base_addr, 4, (p & 0x140) ? DL19FDUPLX : 0);
	}
	if (link) {
	    if (info->phy_id == info->eth_phy) {
		if (p)
		    printk(KERN_INFO "%s: autonegotiation complete: "
			   "%sbaseT-%cD selected\n", dev->name,
			   ((p & 0x0180) ? "100" : "10"),
			   ((p & 0x0140) ? 'F' : 'H'));
		else
		    printk(KERN_INFO "%s: link partner did not "
			   "autonegotiate\n", dev->name);
	    }
	    NS8390_init(dev, 1);
	}
	info->link_status = link;
    }
    if (info->pna_phy && time_after(jiffies, info->mii_reset + 6*HZ)) {
	link = mdio_read(mii_addr, info->eth_phy, 1) & 0x0004;
	if (((info->phy_id == info->pna_phy) && link) ||
	    ((info->phy_id != info->pna_phy) && !link)) {
	    /* isolate this MII and try flipping to the other one */
	    mdio_write(mii_addr, info->phy_id, 0, 0x0400);
	    info->phy_id ^= info->pna_phy ^ info->eth_phy;
	    printk(KERN_INFO "%s: switched to %s transceiver\n", dev->name,
		   (info->phy_id == info->eth_phy) ? "ethernet" : "PNA");
	    mdio_write(mii_addr, info->phy_id, 0,
		       (info->phy_id == info->eth_phy) ? 0x1000 : 0);
	    info->link_status = 0;
	    info->mii_reset = jiffies;
	}
    }

reschedule:
    info->watchdog.expires = jiffies + HZ;
    add_timer(&info->watchdog);
}

/*====================================================================*/

static void netdev_get_drvinfo(struct net_device *dev,
			       struct ethtool_drvinfo *info)
{
	strcpy(info->driver, "pcnet_cs");
}

static struct ethtool_ops netdev_ethtool_ops = {
	.get_drvinfo		= netdev_get_drvinfo,
};

/*====================================================================*/


static int ei_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
    pcnet_dev_t *info = PRIV(dev);
    u16 *data = (u16 *)&rq->ifr_ifru;
    kio_addr_t mii_addr = dev->base_addr + DLINK_GPIO;
    switch (cmd) {
    case SIOCGMIIPHY:
	data[0] = info->phy_id;
    case SIOCGMIIREG:		/* Read MII PHY register. */
	data[3] = mdio_read(mii_addr, data[0], data[1] & 0x1f);
	return 0;
    case SIOCSMIIREG:		/* Write MII PHY register. */
	if (!capable(CAP_NET_ADMIN))
	    return -EPERM;
	mdio_write(mii_addr, data[0], data[1] & 0x1f, data[2]);
	return 0;
    }
    return -EOPNOTSUPP;
}

/*====================================================================*/

static void dma_get_8390_hdr(struct net_device *dev,
			     struct e8390_pkt_hdr *hdr,
			     int ring_page)
{
    kio_addr_t nic_base = dev->base_addr;

    if (ei_status.dmaing) {
	printk(KERN_NOTICE "%s: DMAing conflict in dma_block_input."
	       "[DMAstat:%1x][irqlock:%1x]\n",
	       dev->name, ei_status.dmaing, ei_status.irqlock);
	return;
    }
    
    ei_status.dmaing |= 0x01;
    outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base + PCNET_CMD);
    outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
    outb_p(0, nic_base + EN0_RCNTHI);
    outb_p(0, nic_base + EN0_RSARLO);		/* On page boundary */
    outb_p(ring_page, nic_base + EN0_RSARHI);
    outb_p(E8390_RREAD+E8390_START, nic_base + PCNET_CMD);

    insw(nic_base + PCNET_DATAPORT, hdr,
	    sizeof(struct e8390_pkt_hdr)>>1);
    /* Fix for big endian systems */
    hdr->count = le16_to_cpu(hdr->count);

    outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
    ei_status.dmaing &= ~0x01;
}

/*====================================================================*/

static void dma_block_input(struct net_device *dev, int count,
			    struct sk_buff *skb, int ring_offset)
{
    kio_addr_t nic_base = dev->base_addr;
    int xfer_count = count;
    char *buf = skb->data;

#ifdef PCMCIA_DEBUG
    if ((ei_debug > 4) && (count != 4))
	printk(KERN_DEBUG "%s: [bi=%d]\n", dev->name, count+4);
#endif
    if (ei_status.dmaing) {
	printk(KERN_NOTICE "%s: DMAing conflict in dma_block_input."
	       "[DMAstat:%1x][irqlock:%1x]\n",
	       dev->name, ei_status.dmaing, ei_status.irqlock);
	return;
    }
    ei_status.dmaing |= 0x01;
    outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base + PCNET_CMD);
    outb_p(count & 0xff, nic_base + EN0_RCNTLO);
    outb_p(count >> 8, nic_base + EN0_RCNTHI);
    outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
    outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
    outb_p(E8390_RREAD+E8390_START, nic_base + PCNET_CMD);

    insw(nic_base + PCNET_DATAPORT,buf,count>>1);
    if (count & 0x01)
	buf[count-1] = inb(nic_base + PCNET_DATAPORT), xfer_count++;

    /* This was for the ALPHA version only, but enough people have been
       encountering problems that it is still here. */
#ifdef PCMCIA_DEBUG
    if (ei_debug > 4) {		/* DMA termination address check... */
	int addr, tries = 20;
	do {
	    /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
	       -- it's broken for Rx on some cards! */
	    int high = inb_p(nic_base + EN0_RSARHI);
	    int low = inb_p(nic_base + EN0_RSARLO);
	    addr = (high << 8) + low;
	    if (((ring_offset + xfer_count) & 0xff) == (addr & 0xff))
		break;
	} while (--tries > 0);
	if (tries <= 0)
	    printk(KERN_NOTICE "%s: RX transfer address mismatch,"
		   "%#4.4x (expected) vs. %#4.4x (actual).\n",
		   dev->name, ring_offset + xfer_count, addr);
    }
#endif
    outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
    ei_status.dmaing &= ~0x01;
} /* dma_block_input */

/*====================================================================*/

static void dma_block_output(struct net_device *dev, int count,
			     const u_char *buf, const int start_page)
{
    kio_addr_t nic_base = dev->base_addr;
    pcnet_dev_t *info = PRIV(dev);
#ifdef PCMCIA_DEBUG
    int retries = 0;
#endif
    u_long dma_start;

#ifdef PCMCIA_DEBUG
    if (ei_debug > 4)
	printk(KERN_DEBUG "%s: [bo=%d]\n", dev->name, count);
#endif

    /* Round the count up for word writes.  Do we need to do this?
       What effect will an odd byte count have on the 8390?
       I should check someday. */
    if (count & 0x01)
	count++;
    if (ei_status.dmaing) {
	printk(KERN_NOTICE "%s: DMAing conflict in dma_block_output."
	       "[DMAstat:%1x][irqlock:%1x]\n",
	       dev->name, ei_status.dmaing, ei_status.irqlock);
	return;
    }
    ei_status.dmaing |= 0x01;
    /* We should already be in page 0, but to be safe... */
    outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base+PCNET_CMD);

#ifdef PCMCIA_DEBUG
  retry:
#endif

    outb_p(ENISR_RDC, nic_base + EN0_ISR);

    /* Now the normal output. */
    outb_p(count & 0xff, nic_base + EN0_RCNTLO);
    outb_p(count >> 8,   nic_base + EN0_RCNTHI);
    outb_p(0x00, nic_base + EN0_RSARLO);
    outb_p(start_page, nic_base + EN0_RSARHI);

    outb_p(E8390_RWRITE+E8390_START, nic_base + PCNET_CMD);
    outsw(nic_base + PCNET_DATAPORT, buf, count>>1);

    dma_start = jiffies;

#ifdef PCMCIA_DEBUG
    /* This was for the ALPHA version only, but enough people have been
       encountering problems that it is still here. */
    if (ei_debug > 4) {	/* DMA termination address check... */
	int addr, tries = 20;
	do {
	    int high = inb_p(nic_base + EN0_RSARHI);
	    int low = inb_p(nic_base + EN0_RSARLO);
	    addr = (high << 8) + low;
	    if ((start_page << 8) + count == addr)
		break;
	} while (--tries > 0);
	if (tries <= 0) {
	    printk(KERN_NOTICE "%s: Tx packet transfer address mismatch,"
		   "%#4.4x (expected) vs. %#4.4x (actual).\n",
		   dev->name, (start_page << 8) + count, addr);
	    if (retries++ == 0)
		goto retry;
	}
    }
#endif

    while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
	if (time_after(jiffies, dma_start + PCNET_RDC_TIMEOUT)) {
	    printk(KERN_NOTICE "%s: timeout waiting for Tx RDC.\n",
		   dev->name);
	    pcnet_reset_8390(dev);
	    NS8390_init(dev, 1);
	    break;
	}

    outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
    if (info->flags & DELAY_OUTPUT)
	udelay((long)delay_time);
    ei_status.dmaing &= ~0x01;
}

/*====================================================================*/

static int setup_dma_config(dev_link_t *link, int start_pg,
			    int stop_pg)