diff options
| author | Per Fogelstrom <pefo@cvs.openbsd.org> | 1999-02-01 16:39:51 +0000 |
|---|---|---|
| committer | Per Fogelstrom <pefo@cvs.openbsd.org> | 1999-02-01 16:39:51 +0000 |
| commit | 167b9b7084adff911a0f95f3877a7084923bde89 (patch) | |
| tree | 51b30e8879717dc18785b773569e89781607f974 /sys/arch/wgrisc | |
| parent | d96ecc37310d716c836e9dfafa8a53f56f0efb37 (diff) | |
Set fifo tresholds
Diffstat (limited to 'sys/arch/wgrisc')
| -rw-r--r-- | sys/arch/wgrisc/dev/com_risc.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/sys/arch/wgrisc/dev/com_risc.c b/sys/arch/wgrisc/dev/com_risc.c index df27ce67e38..a4a88f11d36 100644 --- a/sys/arch/wgrisc/dev/com_risc.c +++ b/sys/arch/wgrisc/dev/com_risc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: com_risc.c,v 1.2 1997/07/07 17:09:07 niklas Exp $ */ +/* $OpenBSD: com_risc.c,v 1.3 1999/02/01 16:39:50 pefo Exp $ */ /* * Copyright (c) 1993, 1994 Charles Hannum. @@ -148,19 +148,25 @@ com_risc_attach(parent, self, aux) /* look for a NS 16550AF UART with FIFOs */ + sc->sc_fifolen = 1; bus_space_write_1(iot, ioh, com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_14); delay(100); if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_FIFO_MASK) == - IIR_FIFO_MASK) + IIR_FIFO_MASK) { if (ISSET(bus_space_read_1(iot, ioh, com_fifo), FIFO_TRIGGER_14) == FIFO_TRIGGER_14) { SET(sc->sc_hwflags, COM_HW_FIFO); printf(": ns16550a, working fifo\n"); - } else + sc->sc_fifolen = 16; + } + else { printf(": ns16550, broken fifo\n"); - else + } + } + else { printf(": ns8250 or ns16450, no fifo\n"); + } bus_space_write_1(iot, ioh, com_fifo, 0); /* disable interrupts */ |