diff options
Diffstat (limited to 'sys/mips/cavium/uart_dev_oct16550.c')
| -rw-r--r-- | sys/mips/cavium/uart_dev_oct16550.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sys/mips/cavium/uart_dev_oct16550.c b/sys/mips/cavium/uart_dev_oct16550.c index 753559f..f3d47ca 100644 --- a/sys/mips/cavium/uart_dev_oct16550.c +++ b/sys/mips/cavium/uart_dev_oct16550.c @@ -398,6 +398,8 @@ static int oct16550_bus_probe(struct uart_softc *); static int oct16550_bus_receive(struct uart_softc *); static int oct16550_bus_setsig(struct uart_softc *, int); static int oct16550_bus_transmit(struct uart_softc *); +static void oct16550_bus_grab(struct uart_softc *); +static void oct16550_bus_ungrab(struct uart_softc *); static kobj_method_t oct16550_methods[] = { KOBJMETHOD(uart_attach, oct16550_bus_attach), @@ -411,6 +413,8 @@ static kobj_method_t oct16550_methods[] = { KOBJMETHOD(uart_receive, oct16550_bus_receive), KOBJMETHOD(uart_setsig, oct16550_bus_setsig), KOBJMETHOD(uart_transmit, oct16550_bus_transmit), + KOBJMETHOD(uart_grab, oct16550_bus_grab), + KOBJMETHOD(uart_ungrab, oct16550_bus_ungrab), { 0, 0 } }; @@ -810,3 +814,34 @@ oct16550_bus_transmit (struct uart_softc *sc) uart_unlock(sc->sc_hwmtx); return (0); } + +static void +oct16550_bus_grab(struct uart_softc *sc) +{ + struct uart_bas *bas = &sc->sc_bas; + + /* + * turn off all interrupts to enter polling mode. Leave the + * saved mask alone. We'll restore whatever it was in ungrab. + * All pending interupt signals are reset when IER is set to 0. + */ + uart_lock(sc->sc_hwmtx); + uart_setreg(bas, REG_IER, 0); + uart_barrier(bas); + uart_unlock(sc->sc_hwmtx); +} + +static void +oct16550_bus_ungrab(struct uart_softc *sc) +{ + struct oct16550_softc *oct16550 = (struct oct16550_softc*)sc; + struct uart_bas *bas = &sc->sc_bas; + + /* + * Restore previous interrupt mask + */ + uart_lock(sc->sc_hwmtx); + uart_setreg(bas, REG_IER, oct16550->ier); + uart_barrier(bas); + uart_unlock(sc->sc_hwmtx); +} |
