static int mc32_command(struct net_device *dev, u16 cmd, void *data, int len)
{
struct mc32_local *lp = netdev_priv(dev);
int ioaddr = dev->base_addr;
int ret = 0;
down(&lp->cmd_mutex);
/*
* My Turn
*/
lp->cmd_nonblocking=0;
lp->exec_box->mbox=0;
lp->exec_box->mbox=cmd;
memcpy((void *)lp->exec_box->data, data, len);
barrier(); /* the memcpy forgot the volatile so be sure */
mc32_ready_poll(dev);
outb(1<<6, ioaddr+HOST_CMD);
wait_for_completion(&lp->execution_cmd);
if(lp->exec_box->mbox&(1<<13))
ret = -1;
up(&lp->cmd_mutex);
/*
* A multicast set got blocked - try it now
*/
if(lp->mc_reload_wait)
{
mc32_reset_multicast_list(dev);
}
return ret;
}
static irqreturn_t mc32_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct mc32_local *lp;
int ioaddr, status, boguscount = 0;
int rx_event = 0;
int tx_event = 0;
ioaddr = dev->base_addr;
lp = netdev_priv(dev);
/* See whats cooking */
while((inb(ioaddr+HOST_STATUS)&HOST_STATUS_CWR) && boguscount++<2000)
{
status=inb(ioaddr+HOST_CMD);
#ifdef DEBUG_IRQ
printk("Status TX%d RX%d EX%d OV%d BC%d\n",
(status&7), (status>>3)&7, (status>>6)&1,
(status>>7)&1, boguscount);
#endif
switch(status&7)
{
case 0:
break;
case 6: /* TX fail */
case 2: /* TX ok */
tx_event = 1;
break;
case 3: /* Halt */
case 4: /* Abort */
complete(&lp->xceiver_cmd);
break;
default:
printk("%s: strange tx ack %d\n", dev->name, status&7);
}
status>>=3;
switch(status&7)
{
case 0:
break;
case 2: /* RX */
rx_event=1;
break;
case 3: /* Halt */
case 4: /* Abort */
complete(&lp->xceiver_cmd);
break;
case 6:
/* Out of RX buffers stat */
/* Must restart rx */
dev->stats.rx_dropped++;
mc32_rx_ring(dev);
mc32_start_transceiver(dev);
break;
default:
printk("%s: strange rx ack %d\n",
dev->name, status&7);
}
status>>=3;
if(status&1)
{
/*
* No thread is waiting: we need to tidy
* up ourself.
*/
if (lp->cmd_nonblocking) {
up(&lp->cmd_mutex);
if (lp->mc_reload_wait)
mc32_reset_multicast_list(dev);
}
else complete(&lp->execution_cmd);
}
if(status&2)
{
/*
* We get interrupted once per
* counter that is about to overflow.
*/
mc32_update_stats(dev);
}
}
/*
* Process the transmit and receive rings
*/
if(tx_event)
mc32_tx_ring(dev);
if(rx_event)
mc32_rx_ring(dev);
return IRQ_HANDLED;
}