WBCIR_REG_SP3_ASCR
outb(WBCIR_RX_DISABLE, data->sbase + WBCIR_REG_SP3_ASCR);
outb(WBCIR_TX_UNDERRUN, data->sbase + WBCIR_REG_SP3_ASCR);
outb(WBCIR_TX_EOT, data->sbase + WBCIR_REG_SP3_ASCR);
if (inb(data->sbase + WBCIR_REG_SP3_ASCR) & WBCIR_TX_UNDERRUN)
outb(0xE0, data->sbase + WBCIR_REG_SP3_ASCR);