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Obtained from: partly from ancient patches of mine via 1.1.5

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Handle MDMBUF a little better.  Prepare to handle 4 different kinds of
output flow control.
This commit is contained in:
Bruce Evans 1995-07-31 22:48:46 +00:00
parent 8f5171930e
commit 35b46c174c
2 changed files with 14 additions and 3 deletions
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8
sys/kern/tty.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)tty.c 8.8 (Berkeley) 1/21/94
* $Id: tty.c,v 1.63 1995/07/31 21:01:23 bde Exp $
* $Id: tty.c,v 1.64 1995/07/31 21:43:37 bde Exp $
*/
/*-
@ -1297,11 +1297,15 @@ ttymodem(tp, flag)
if (ISSET(tp->t_state, TS_CARR_ON) && ISSET(tp->t_cflag, MDMBUF)) {
/*
* MDMBUF: do flow control according to carrier flag
* XXX TS_CAR_OFLOW doesn't do anything yet. TS_TTSTOP
* works if IXON and IXANY are clear.
*/
if (flag) {
CLR(tp->t_state, TS_CAR_OFLOW);
CLR(tp->t_state, TS_TTSTOP);
ttstart(tp);
} else if (!ISSET(tp->t_state, TS_TTSTOP)) {
} else if (!ISSET(tp->t_state, TS_CAR_OFLOW)) {
SET(tp->t_state, TS_CAR_OFLOW);
SET(tp->t_state, TS_TTSTOP);
#ifdef sun4c /* XXX */
(*tp->t_stop)(tp, 0);

9
sys/sys/tty.h
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)tty.h 8.6 (Berkeley) 1/21/94
* $Id: tty.h,v 1.28 1995/07/31 19:17:19 bde Exp $
* $Id: tty.h,v 1.29 1995/07/31 21:02:00 bde Exp $
*/
#ifndef _SYS_TTY_H_
@ -159,6 +159,13 @@ struct tty {
#define TS_SO_OCOMPLETE 0x080000 /* Wake up when output completes. */
#define TS_ZOMBIE 0x100000 /* Connection lost. */
/* Hardware flow-control-invoked bits. */
#define TS_CAR_OFLOW 0x200000 /* For MDMBUF (XXX handle in driver). */
#ifdef notyet
#define TS_CTS_OFLOW 0x400000 /* For CCTS_OFLOW. */
#define TS_DSR_OFLOW 0x800000 /* For CDSR_OFLOW. */
#endif
/* Character type information. */
#define ORDINARY 0
#define CONTROL 1