/* on each timer ticks we check two things, Link Status (ON/OFF) and
Link Mode (10/100/Full/Half)
*/
static void sis900_timer(unsigned long data)
{
struct device *net_dev = (struct device *)data;
struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
struct mii_phy *mii_phy = sis_priv->mii;
static int next_tick = 5*HZ;
u16 status;
status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
/* current mii phy is failed to link, try another one */
while (!(status & MII_STAT_LINK)) {
if (mii_phy->next == NULL) {
if (sis_priv->LinkOn) {
/* link stat change from ON to OFF */
next_tick = HZ;
sis_priv->LinkOn = FALSE;
printk(KERN_INFO "%s: Media Link Off\n",
net_dev->name);
}
sis_priv->timer.expires = jiffies + next_tick;
add_timer(&sis_priv->timer);
return;
}
mii_phy = mii_phy->next;
status = mdio_read(net_dev, mii_phy->phy_addr, MII_STATUS);
}
if (!sis_priv->LinkOn) {
/* link stat change forn OFF to ON, read and report link mode */
sis_priv->LinkOn = TRUE;
next_tick = 5*HZ;
/* change what cur_phy means */
if (mii_phy->phy_addr != sis_priv->cur_phy) {
printk(KERN_INFO "%s: Changing transceiver to %s\n", net_dev->name,
mii_phy->chip_info->name);
status = mdio_read(net_dev, sis_priv->cur_phy, MII_CONTROL);
mdio_write(net_dev, sis_priv->cur_phy,
MII_CONTROL, status | MII_CNTL_ISOLATE);
status = mdio_read(net_dev, mii_phy->phy_addr, MII_CONTROL);
mdio_write(net_dev, mii_phy->phy_addr,
MII_CONTROL, status & ~MII_CNTL_ISOLATE);
sis_priv->cur_phy = mii_phy->phy_addr;
}
sis900_check_mode(net_dev, mii_phy);
}
sis_priv->timer.expires = jiffies + next_tick;
add_timer(&sis_priv->timer);
}
static void
sis900_init(struct nic *nic)
{
sis900_reset(nic);
sis900_init_rxfilter(nic);
sis900_init_txd(nic);
sis900_init_rxd(nic);
sis900_set_rx_mode(nic);
sis900_check_mode(nic);
outl(RxENA, ioaddr + cr);
}
static int
sis900_open(struct device *net_dev)
{
struct sis900_private *sis_priv = (struct sis900_private *)net_dev->priv;
long ioaddr = net_dev->base_addr;
/* Soft reset the chip. */
sis900_reset(net_dev);
if (request_irq(net_dev->irq, &sis900_interrupt, SA_SHIRQ, net_dev->name, net_dev)) {
return -EAGAIN;
}
MOD_INC_USE_COUNT;
sis900_init_rxfilter(net_dev);
sis900_init_tx_ring(net_dev);
sis900_init_rx_ring(net_dev);
set_rx_mode(net_dev);
net_dev->tbusy = 0;
net_dev->interrupt = 0;
net_dev->start = 1;
/* Enable all known interrupts by setting the interrupt mask. */
outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
outl(RxENA, ioaddr + cr);
outl(IE, ioaddr + ier);
sis900_check_mode(net_dev, sis_priv->mii);
/* Set the timer to switch to check for link beat and perhaps switch
to an alternate media type. */
init_timer(&sis_priv->timer);
sis_priv->timer.expires = jiffies + HZ;
sis_priv->timer.data = (unsigned long)net_dev;
sis_priv->timer.function = &sis900_timer;
add_timer(&sis_priv->timer);
return 0;
}
