CSCR
if (RTL_R16 (CSCR) & CSCR_LinkOKBit) {
RTL_W16 (CSCR, CSCR_LinkDownOffCmd);
RTL_W16 (CSCR, CSCR_LinkDownCmd);
linkcase = RTL_R16 (CSCR) & CSCR_LinkStatusBits;
if ((RTL_R16 (CSCR) &
link_changed = RTL_R16 (CSCR) & CSCR_LinkChangeBit;
get_registers(dev, CSCR, 2, &tmp);