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Set the FIFO threshold based on the receive speed, per Mark Weaver.

This commit is contained in:
mycroft 1994-08-24 07:25:18 +00:00
parent a3f993944d
commit 5e4a51278b
3 changed files with 21 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
sys/arch/i386/isa/com.c
View File

@ -32,7 +32,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: com.c,v 1.34 1994/08/21 15:04:37 mycroft Exp $
* $Id: com.c,v 1.35 1994/08/24 07:25:18 mycroft Exp $
*/
/*
@ -297,10 +297,6 @@ comopen(dev, flag, mode, p)
iobase = sc->sc_iobase;
/* flush any pending I/O */
if (sc->sc_hwflags & COM_HW_FIFO)
outb(iobase + com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST |
FIFO_TRIGGER_8);
(void) inb(iobase + com_lsr);
(void) inb(iobase + com_data);
/* you turn me on, baby */
@ -559,6 +555,12 @@ comparam(tp, t)
s = spltty();
/* Set the FIFO threshold based on the receive speed. */
if (sc->sc_hwflags & COM_HW_FIFO)
outb(iobase + com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST |
(t->c_ispeed <= 1200 ? FIFO_TRIGGER_1 : FIFO_TRIGGER_8));
if (ospeed == 0)
outb(iobase + com_mcr, sc->sc_mcr &= ~MCR_DTR);
else

12
sys/dev/ic/com.c
View File

@ -32,7 +32,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: com.c,v 1.34 1994/08/21 15:04:37 mycroft Exp $
* $Id: com.c,v 1.35 1994/08/24 07:25:18 mycroft Exp $
*/
/*
@ -297,10 +297,6 @@ comopen(dev, flag, mode, p)
iobase = sc->sc_iobase;
/* flush any pending I/O */
if (sc->sc_hwflags & COM_HW_FIFO)
outb(iobase + com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST |
FIFO_TRIGGER_8);
(void) inb(iobase + com_lsr);
(void) inb(iobase + com_data);
/* you turn me on, baby */
@ -559,6 +555,12 @@ comparam(tp, t)
s = spltty();
/* Set the FIFO threshold based on the receive speed. */
if (sc->sc_hwflags & COM_HW_FIFO)
outb(iobase + com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST |
(t->c_ispeed <= 1200 ? FIFO_TRIGGER_1 : FIFO_TRIGGER_8));
if (ospeed == 0)
outb(iobase + com_mcr, sc->sc_mcr &= ~MCR_DTR);
else

12
sys/dev/isa/com.c
View File

@ -32,7 +32,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: com.c,v 1.34 1994/08/21 15:04:37 mycroft Exp $
* $Id: com.c,v 1.35 1994/08/24 07:25:18 mycroft Exp $
*/
/*
@ -297,10 +297,6 @@ comopen(dev, flag, mode, p)
iobase = sc->sc_iobase;
/* flush any pending I/O */
if (sc->sc_hwflags & COM_HW_FIFO)
outb(iobase + com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST |
FIFO_TRIGGER_8);
(void) inb(iobase + com_lsr);
(void) inb(iobase + com_data);
/* you turn me on, baby */
@ -559,6 +555,12 @@ comparam(tp, t)
s = spltty();
/* Set the FIFO threshold based on the receive speed. */
if (sc->sc_hwflags & COM_HW_FIFO)
outb(iobase + com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST |
(t->c_ispeed <= 1200 ? FIFO_TRIGGER_1 : FIFO_TRIGGER_8));
if (ospeed == 0)
outb(iobase + com_mcr, sc->sc_mcr &= ~MCR_DTR);
else