FCR_ENABLE
#define FIFO_ENABLE FCR_ENABLE
fcr = FCR_ENABLE;
ns8250->fcr = FCR_ENABLE;
uart_setreg(bas, REG_FCR, FCR_ENABLE);
uart_setreg(bas, REG_FCR, FCR_ENABLE | FCR_XMT_RST | FCR_RCV_RST);
if ((sc->fcr & FCR_ENABLE) ^ (value & FCR_ENABLE)) {
fifosz = (value & FCR_ENABLE) ?
if ((value & FCR_ENABLE) == 0) {
(FCR_ENABLE | FCR_DMA | FCR_RX_MASK);
iir = (sc->fcr & FCR_ENABLE) ? IIR_FIFO_MASK : 0;