diff options
Diffstat (limited to 'sys/dev/uart/uart_dev_ns8250.c')
| -rw-r--r-- | sys/dev/uart/uart_dev_ns8250.c | 43 |
1 files changed, 37 insertions, 6 deletions
diff --git a/sys/dev/uart/uart_dev_ns8250.c b/sys/dev/uart/uart_dev_ns8250.c index 2498fa37db76..74d7bb7c1f95 100644 --- a/sys/dev/uart/uart_dev_ns8250.c +++ b/sys/dev/uart/uart_dev_ns8250.c @@ -198,6 +198,9 @@ ns8250_flush(struct uart_bas *bas, int what) uint8_t fcr; fcr = FCR_ENABLE; +#ifdef CPU_XBURST + fcr |= FCR_UART_ON; +#endif if (what & UART_FLUSH_TRANSMITTER) fcr |= FCR_XMT_RST; if (what & UART_FLUSH_RECEIVER) @@ -268,6 +271,10 @@ ns8250_probe(struct uart_bas *bas) { u_char val; +#ifdef CPU_XBURST + uart_setreg(bas, REG_FCR, FCR_UART_ON); +#endif + /* Check known 0 bits that don't depend on DLAB. */ val = uart_getreg(bas, REG_IIR); if (val & 0x30) @@ -289,7 +296,7 @@ static void ns8250_init(struct uart_bas *bas, int baudrate, int databits, int stopbits, int parity) { - u_char ier; + u_char ier, val; if (bas->rclk == 0) bas->rclk = DEFAULT_RCLK; @@ -306,7 +313,11 @@ ns8250_init(struct uart_bas *bas, int baudrate, int databits, int stopbits, uart_barrier(bas); /* Disable the FIFO (if present). */ - uart_setreg(bas, REG_FCR, 0); + val = 0; +#ifdef CPU_XBURST + val = FCR_UART_ON; +#endif + uart_setreg(bas, REG_FCR, val); uart_barrier(bas); /* Set RTS & DTR. */ @@ -461,6 +472,9 @@ ns8250_bus_attach(struct uart_softc *sc) ns8250->mcr = uart_getreg(bas, REG_MCR); ns8250->fcr = FCR_ENABLE; +#ifdef CPU_XBURST + ns8250->fcr |= FCR_UART_ON; +#endif if (!resource_int_value("uart", device_get_unit(sc->sc_dev), "flags", &ivar)) { if (UART_FLAGS_FCR_RX_LOW(ivar)) @@ -753,6 +767,7 @@ ns8250_bus_probe(struct uart_softc *sc) struct uart_bas *bas; int count, delay, error, limit; uint8_t lsr, mcr, ier; + uint8_t val; ns8250 = (struct ns8250_softc *)sc; bas = &sc->sc_bas; @@ -786,7 +801,11 @@ ns8250_bus_probe(struct uart_softc *sc) * done. Since this is the first time we enable the FIFOs, we reset * them. */ - uart_setreg(bas, REG_FCR, FCR_ENABLE); + val = FCR_ENABLE; +#ifdef CPU_XBURST + val |= FCR_UART_ON; +#endif + uart_setreg(bas, REG_FCR, val); uart_barrier(bas); if (!(uart_getreg(bas, REG_IIR) & IIR_FIFO_MASK)) { /* @@ -800,7 +819,11 @@ ns8250_bus_probe(struct uart_softc *sc) return (0); } - uart_setreg(bas, REG_FCR, FCR_ENABLE | FCR_XMT_RST | FCR_RCV_RST); + val = FCR_ENABLE | FCR_XMT_RST | FCR_RCV_RST; +#ifdef CPU_XBURST + val |= FCR_UART_ON; +#endif + uart_setreg(bas, REG_FCR, val); uart_barrier(bas); count = 0; @@ -810,7 +833,11 @@ ns8250_bus_probe(struct uart_softc *sc) error = ns8250_drain(bas, UART_DRAIN_RECEIVER|UART_DRAIN_TRANSMITTER); if (error) { uart_setreg(bas, REG_MCR, mcr); - uart_setreg(bas, REG_FCR, 0); + val = 0; +#ifdef CPU_XBURST + val |= FCR_UART_ON; +#endif + uart_setreg(bas, REG_FCR, val); uart_barrier(bas); goto describe; } @@ -840,7 +867,11 @@ ns8250_bus_probe(struct uart_softc *sc) ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask; uart_setreg(bas, REG_IER, ier); uart_setreg(bas, REG_MCR, mcr); - uart_setreg(bas, REG_FCR, 0); + val = 0; +#ifdef CPU_XBURST + val |= FCR_UART_ON; +#endif + uart_setreg(bas, REG_FCR, val); uart_barrier(bas); count = 0; goto describe; |