/*
* 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;
}
static int
net_send_packet(struct sk_buff *skb, struct device *dev)
{
struct net_local *lp = (struct net_local *)dev->priv;
int ioaddr = dev->base_addr;
if (dev->tbusy) {
/* If we get here, some higher level has decided we are broken.
There should really be a "kick me" function call instead. */
int tickssofar = jiffies - dev->trans_start;
if (tickssofar < 5)
return 1;
printk("%s: transmit timed out, %s?\n", dev->name,
tx_done(dev) ? "IRQ conflict" : "network cable problem");
/* Try to restart the adaptor. */
chipset_init(dev, 1);
dev->tbusy=0;
dev->trans_start = jiffies;
}
/* If some higher layer thinks we've missed an tx-done interrupt
we are passed NULL. Caution: dev_tint() handles the cli()/sti()
itself. */
if (skb == NULL) {
dev_tint(dev);
return 0;
}
/* For ethernet, fill in the header. This should really be done by a
higher level, rather than duplicated for each ethernet adaptor. */
if (!skb->arp && dev->rebuild_header(skb->data, dev)) {
skb->dev = dev;
arp_queue (skb);
return 0;
}
skb->arp=1;
/* Block a timer-based transmit from overlapping. This could better be
done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
if (set_bit(0, (void*)&dev->tbusy) != 0)
printk("%s: Transmitter access conflict.\n", dev->name);
else {
short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
unsigned char *buf = skb->data;
hardware_send_packet(ioaddr, buf, length);
dev->trans_start = jiffies;
}
if (skb->free)
kfree_skb (skb, FREE_WRITE);
/* You might need to clean up and record Tx statistics here. */
if (inw(ioaddr) == /*RU*/81)
lp->stats.tx_aborted_errors++;
return 0;
}
static int cl_set_var(struct fb_info *info, const struct fb_var_screeninfo *var) {
cirrus_chip_info.doubleVCLK = 0;
cirrus_chip_info.multiplexing = 0;
cirrus_chip_info.screen_info = var;
cirrus_chip_info.screen_base = info->screen_base;
chipset_init(&cirrus_chip_info);
setup_resolution(&cirrus_chip_info);
cirrus_setup_bits_per_pixel(&cirrus_chip_info);
vga_display_enable(1);
return 0;
}
