diff options
Diffstat (limited to 'sys/dev/uart/uart_tty.c')
| -rw-r--r-- | sys/dev/uart/uart_tty.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/sys/dev/uart/uart_tty.c b/sys/dev/uart/uart_tty.c index f306af5..2170108 100644 --- a/sys/dev/uart/uart_tty.c +++ b/sys/dev/uart/uart_tty.c @@ -168,6 +168,14 @@ uart_tty_outwakeup(struct tty *tp) if (sc->sc_txbusy) return; + /* + * Respect RTS/CTS (output) flow control if enabled and not already + * handled by hardware. + */ + if ((tp->t_termios.c_cflag & CCTS_OFLOW) && !sc->sc_hwoflow && + !(sc->sc_hwsig & SER_CTS)) + return; + sc->sc_txdatasz = ttydisc_getc(tp, sc->sc_txbuf, sc->sc_txfifosz); if (sc->sc_txdatasz != 0) UART_TRANSMIT(sc); @@ -315,11 +323,8 @@ uart_tty_intr(void *arg) sig = pend & SER_INT_SIGMASK; if (sig & SER_DDCD) ttydisc_modem(tp, sig & SER_DCD); - if ((sig & SER_DCTS) && (tp->t_termios.c_cflag & CCTS_OFLOW) && - !sc->sc_hwoflow) { - if (sig & SER_CTS) - uart_tty_outwakeup(tp); - } + if (sig & SER_DCTS) + uart_tty_outwakeup(tp); } if (pend & SER_INT_TXIDLE) |
