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Fix a problem where no Tx Empty interrupt ever happened if CTS

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was deasserted and we wanted to change parameters to -crtscts
This effectively stalled the transmitter since with TS_BUSY set
we only change parameters during the Tx interrupt handler.
This commit is contained in:
scw 1999-04-03 13:13:19 +00:00
parent 65235b4248
commit 9737cf763a
1 changed files with 16 additions and 9 deletions
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25
sys/dev/ic/clmpcc.c
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@ -1,4 +1,4 @@
/* $NetBSD: clmpcc.c,v 1.4 1999/02/21 14:01:50 scw Exp $ */
/* $NetBSD: clmpcc.c,v 1.5 1999/04/03 13:13:19 scw Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
@ -817,6 +817,7 @@ clmpcc_param(tp, t)
struct clmpcc_softc *sc = clmpcc_cd.cd_devs[CLMPCCUNIT(tp->t_dev)];
struct clmpcc_chan *ch = &sc->sc_chans[CLMPCCCHAN(tp->t_dev)];
u_char cor;
u_char oldch;
int oclk, obpr;
int iclk, ibpr;
int s;
@ -921,13 +922,22 @@ clmpcc_param(tp, t)
ch->ch_cor5 = 0;
s = splserial();
if ( ISCLR(ch->ch_tty->t_state, TS_BUSY) ) {
u_char oldch;
oldch = clmpcc_select_channel(sc, ch->ch_car);
oldch = clmpcc_select_channel(sc, ch->ch_car);
/*
* COR2 needs to be set immediately otherwise we might never get
* a Tx EMPTY interrupt to change the other parameters.
*/
if ( clmpcc_rdreg(sc, CLMPCC_REG_COR2) != ch->ch_cor2 )
clmpcc_wrreg(sc, CLMPCC_REG_COR2, ch->ch_cor2);
if ( ISCLR(ch->ch_tty->t_state, TS_BUSY) )
clmpcc_set_params(ch);
clmpcc_select_channel(sc, oldch);
} else
else
SET(ch->ch_flags, CLMPCC_FLG_UPDATE_PARMS);
clmpcc_select_channel(sc, oldch);
splx(s);
return 0;
@ -967,9 +977,6 @@ clmpcc_set_params(ch)
SET(ch->ch_flags, CLMPCC_FLG_NEED_INIT);
}
if ( clmpcc_rdreg(sc, CLMPCC_REG_COR2) != ch->ch_cor2 )
clmpcc_wrreg(sc, CLMPCC_REG_COR2, ch->ch_cor2);
if ( clmpcc_rdreg(sc, CLMPCC_REG_COR3) != ch->ch_cor3 )
clmpcc_wrreg(sc, CLMPCC_REG_COR3, ch->ch_cor3);