static int znet_send_packet(struct sk_buff *skb, struct net_device *dev)
{
int ioaddr = dev->base_addr;
struct znet_private *znet = dev->priv;
unsigned long flags;
short length = skb->len;
if (znet_debug > 4)
printk(KERN_DEBUG "%s: ZNet_send_packet.\n", dev->name);
if (length < ETH_ZLEN) {
skb = skb_padto(skb, ETH_ZLEN);
if (skb == NULL)
return 0;
length = ETH_ZLEN;
}
netif_stop_queue (dev);
/* Check that the part hasn't reset itself, probably from suspend. */
outb(CR0_STATUS_0, ioaddr);
if (inw(ioaddr) == 0x0010 &&
inw(ioaddr) == 0x0000 &&
inw(ioaddr) == 0x0010) {
if (znet_debug > 1)
printk (KERN_WARNING "%s : waking up\n", dev->name);
hardware_init(dev);
znet_transceiver_power (dev, 1);
}
if (1) {
unsigned char *buf = (void *)skb->data;
ushort *tx_link = znet->tx_cur - 1;
ushort rnd_len = (length + 1)>>1;
znet->stats.tx_bytes+=length;
if (znet->tx_cur >= znet->tx_end)
znet->tx_cur = znet->tx_start;
*znet->tx_cur++ = length;
if (znet->tx_cur + rnd_len + 1 > znet->tx_end) {
int semi_cnt = (znet->tx_end - znet->tx_cur)<<1; /* Cvrt to byte cnt. */
memcpy(znet->tx_cur, buf, semi_cnt);
rnd_len -= semi_cnt>>1;
memcpy(znet->tx_start, buf + semi_cnt, length - semi_cnt);
znet->tx_cur = znet->tx_start + rnd_len;
} else {
static int znet_open(struct net_device *dev)
{
int ioaddr = dev->base_addr;
if (znet_debug > 2)
printk(KERN_DEBUG "%s: znet_open() called.\n", dev->name);
/* These should never fail. You can't add devices to a sealed box! */
if (znet_request_resources (dev)) {
printk(KERN_WARNING "%s: Not opened -- resource busy?!?\n", dev->name);
return -EBUSY;
}
znet_transceiver_power (dev, 1);
/* According to the Crynwr driver we should wait 50 msec. for the
LAN clock to stabilize. My experiments indicates that the '593 can
be initialized immediately. The delay is probably needed for the
DC-to-DC converter to come up to full voltage, and for the oscillator
to be spot-on at 20Mhz before transmitting.
Until this proves to be a problem we rely on the higher layers for the
delay and save allocating a timer entry. */
/* maz : Well, I'm getting every time the following message
* without the delay on a 486@33. This machine is much too
* fast... :-) So maybe the Crynwr driver wasn't wrong after
* all, even if the message is completly harmless on my
* setup. */
mdelay (50);
/* This follows the packet driver's lead, and checks for success. */
if (inb(ioaddr) != 0x10 && inb(ioaddr) != 0x00)
printk(KERN_WARNING "%s: Problem turning on the transceiver power.\n",
dev->name);
hardware_init(dev);
netif_start_queue (dev);
return 0;
}