static int detect_bnc(struct nic *nic)
{
clrline(); printf("attempting %s:","BNC");
control_dc_dc(1);
writereg(PP_LineCTL, (eth_linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);
if (send_test_pkt(nic)) {
return A_CNF_MEDIA_10B_2; }
else
return 0;
}
static int detect_tp(void)
{
unsigned long tmo;
/* Turn on the chip auto detection of 10BT/ AUI */
clrline();
printf("attempting %s:","TP");
/* If connected to another full duplex capable 10-Base-T card
the link pulses seem to be lost when the auto detect bit in
the LineCTL is set. To overcome this the auto detect bit
will be cleared whilst testing the 10-Base-T interface.
This would not be necessary for the sparrow chip but is
simpler to do it anyway. */
writereg(PP_LineCTL, eth_linectl &~ AUI_ONLY);
control_dc_dc(0);
/* Delay for the hardware to work out if the TP cable is
present - 150ms */
for (tmo = currticks() + 4; currticks() < tmo; );
if ((readreg(PP_LineST) & LINK_OK) == 0)
return 0;
if (eth_cs_type != CS8900) {
writereg(PP_AutoNegCTL, eth_auto_neg_cnf & AUTO_NEG_MASK);
if ((eth_auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
printf(" negotiating duplex... ");
while (readreg(PP_AutoNegST) & AUTO_NEG_BUSY) {
if (currticks() - tmo > 40*TICKS_PER_SEC) {
printf("time out ");
break;
}
}
}
if (readreg(PP_AutoNegST) & FDX_ACTIVE)
printf("using full duplex");
else
printf("using half duplex");
}
return A_CNF_MEDIA_10B_T;
}