UART01x_FR_MODEM_ANY
status = readb(port->membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
uap->old_status = readb(port->membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
status = pl011_read(uap, REG_FR) & UART01x_FR_MODEM_ANY;
uap->old_status = pl011_read(uap, REG_FR) & UART01x_FR_MODEM_ANY;