diff options
Diffstat (limited to 'sys/dev/uart/uart_core.c')
| -rw-r--r-- | sys/dev/uart/uart_core.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/sys/dev/uart/uart_core.c b/sys/dev/uart/uart_core.c index fb1bb64..47d5f3d 100644 --- a/sys/dev/uart/uart_core.c +++ b/sys/dev/uart/uart_core.c @@ -58,6 +58,12 @@ SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs = static MALLOC_DEFINE(M_UART, "UART", "UART driver"); +#ifndef UART_POLL_FREQ +#define UART_POLL_FREQ 50 +#endif +static int uart_poll_freq = UART_POLL_FREQ; +TUNABLE_INT("debug.uart_poll_freq", &uart_poll_freq); + void uart_add_sysdev(struct uart_devinfo *di) { @@ -257,6 +263,12 @@ uart_intr(void *arg) if (ipend & SER_INT_TXIDLE) uart_intr_txidle(sc); } + + if (sc->sc_polled) { + callout_reset(&sc->sc_timer, hz / uart_poll_freq, + (timeout_t *)uart_intr, sc); + } + return((flag)?FILTER_HANDLED:FILTER_STRAY); } @@ -440,8 +452,9 @@ uart_bus_attach(device_t dev) } } if (sc->sc_ires == NULL) { - /* XXX no interrupt resource. Force polled mode. */ + /* No interrupt resource. Force polled mode. */ sc->sc_polled = 1; + callout_init(&sc->sc_timer, 1); } sc->sc_rxbufsz = 384; |
