diff options
| -rw-r--r-- | sys/dev/uart/uart_dev_z8530.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sys/dev/uart/uart_dev_z8530.c b/sys/dev/uart/uart_dev_z8530.c index 25bdca7..4c7c45f 100644 --- a/sys/dev/uart/uart_dev_z8530.c +++ b/sys/dev/uart/uart_dev_z8530.c @@ -244,6 +244,7 @@ z8530_getc(struct uart_bas *bas) struct z8530_softc { struct uart_softc base; uint8_t tpc; + uint8_t txidle; }; static int z8530_bus_attach(struct uart_softc *); @@ -305,6 +306,7 @@ z8530_bus_attach(struct uart_softc *sc) z8530->tpc = z8530_setup(bas, 9600, 8, 1, UART_PARITY_NONE); z8530->tpc &= ~(TPC_DTR|TPC_RTS); } + z8530->txidle = 1; /* Report UART_IPEND_TXIDLE. */ sc->sc_rxfifosz = 3; sc->sc_txfifosz = 1; @@ -385,6 +387,7 @@ z8530_bus_ioctl(struct uart_softc *sc, int request, intptr_t data) static int z8530_bus_ipend(struct uart_softc *sc) { + struct z8530_softc *z8530 = (struct z8530_softc*)sc; struct uart_bas *bas; int ipend; uint32_t sig; @@ -400,9 +403,10 @@ z8530_bus_ipend(struct uart_softc *sc) uart_setreg(bas, REG_CTRL, CR_RSTXSI); ipend |= UART_IPEND_BREAK; } - if (bes & BES_TXE) { + if (bes & BES_TXE && z8530->txidle) { uart_setreg(bas, REG_CTRL, CR_RSTTXI); ipend |= UART_IPEND_TXIDLE; + z8530->txidle = 0; /* Suppress UART_IPEND_TXIDLE. */ } if (bes & BES_RXA) ipend |= UART_IPEND_RXREADY; @@ -533,6 +537,7 @@ z8530_bus_setsig(struct uart_softc *sc, int sig) static int z8530_bus_transmit(struct uart_softc *sc) { + struct z8530_softc *z8530 = (struct z8530_softc*)sc; struct uart_bas *bas; bas = &sc->sc_bas; @@ -542,6 +547,7 @@ z8530_bus_transmit(struct uart_softc *sc) uart_setreg(bas, REG_DATA, sc->sc_txbuf[0]); uart_barrier(bas); sc->sc_txbusy = 1; + z8530->txidle = 1; /* Report UART_IPEND_TXIDLE again. */ mtx_unlock_spin(&sc->sc_hwmtx); return (0); } |
