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Code Issues Releases Activity

1) Better fix for false carrier detect on bidir port

Browse Source 
2) ttyclose moved after comhardclose, because clears t_state
3) slpx(s) moved after l_open to prevent undetected carrier down
This commit is contained in:
Andrey A. Chernov 1994-03-26 13:40:18 +00:00
parent dad5c5fe90
commit 827f6dbf32
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=1311
3 changed files with 48 additions and 24 deletions
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24
sys/dev/sio/sio.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.38 1994/03/23 17:28:35 ache Exp $
* $Id: sio.c,v 1.39 1994/03/25 15:10:50 ache Exp $
*/
#include "sio.h"
@ -551,6 +551,7 @@ sioopen(dev, flag, mode, p)
#ifdef COM_BIDIR
bool_t callout;
#endif /* COM_BIDIR */
bool_t got_status = FALSE;
struct com_s *com;
int error = 0;
Port_t iobase;
@ -576,6 +577,7 @@ sioopen(dev, flag, mode, p)
#ifdef COM_BIDIR
bidir_open_top:
got_status = FALSE;
/* if it's bidirectional, we've gotta deal with it... */
if (com->bidir) {
if (callout) {
@ -608,7 +610,13 @@ sioopen(dev, flag, mode, p)
/* else take it from the top */
goto bidir_open_top;
}
} else if (com->prev_modem_status & MSR_DCD
}
disable_intr();
com->last_modem_status =
com->prev_modem_status = inb(com->modem_status_port);
enable_intr();
got_status = TRUE;
if (com->prev_modem_status & MSR_DCD
|| FAKE_DCD(unit)) {
/* there's a carrier on the line; we win */
com->active_in = TRUE;
@ -707,11 +715,12 @@ sioopen(dev, flag, mode, p)
disable_intr();
(void) inb(com->line_status_port);
(void) inb(com->data_port);
com->last_modem_status =
com->prev_modem_status = inb(com->modem_status_port);
outb(iobase + com_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS
| IER_EMSC);
enable_intr();
if (!got_status)
com->last_modem_status = com->prev_modem_status;
if (com->prev_modem_status & MSR_DCD || FAKE_DCD(unit))
tp->t_state |= TS_CARR_ON;
} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) {
@ -734,9 +743,9 @@ sioopen(dev, flag, mode, p)
break;
}
out:
splx(s);
if (error == 0)
error = (*linesw[tp->t_line].l_open)(dev, tp, 0);
splx(s);
#ifdef COM_BIDIR
/* wakeup sleepers */
@ -768,14 +777,15 @@ sioclose(dev, flag, mode, p)
{
struct com_s *com;
struct tty *tp;
int s = spltty();
int s;
com = com_addr(UNIT(dev));
tp = com->tp;
s = spltty();
(*linesw[tp->t_line].l_close)(tp, flag);
siostop(tp, FREAD|FWRITE);
ttyclose(tp);
comhardclose(com);
ttyclose(tp);
splx(s);
return (0);
}
@ -818,8 +828,6 @@ comhardclose(com)
tsleep((caddr_t)&com->dtr_wait, TTIPRI,
"sioclose", com->dtr_wait);
}
com->last_modem_status =
com->prev_modem_status = inb(com->modem_status_port);
}
#ifdef COM_BIDIR

24
sys/i386/isa/sio.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.38 1994/03/23 17:28:35 ache Exp $
* $Id: sio.c,v 1.39 1994/03/25 15:10:50 ache Exp $
*/
#include "sio.h"
@ -551,6 +551,7 @@ sioopen(dev, flag, mode, p)
#ifdef COM_BIDIR
bool_t callout;
#endif /* COM_BIDIR */
bool_t got_status = FALSE;
struct com_s *com;
int error = 0;
Port_t iobase;
@ -576,6 +577,7 @@ sioopen(dev, flag, mode, p)
#ifdef COM_BIDIR
bidir_open_top:
got_status = FALSE;
/* if it's bidirectional, we've gotta deal with it... */
if (com->bidir) {
if (callout) {
@ -608,7 +610,13 @@ sioopen(dev, flag, mode, p)
/* else take it from the top */
goto bidir_open_top;
}
} else if (com->prev_modem_status & MSR_DCD
}
disable_intr();
com->last_modem_status =
com->prev_modem_status = inb(com->modem_status_port);
enable_intr();
got_status = TRUE;
if (com->prev_modem_status & MSR_DCD
|| FAKE_DCD(unit)) {
/* there's a carrier on the line; we win */
com->active_in = TRUE;
@ -707,11 +715,12 @@ sioopen(dev, flag, mode, p)
disable_intr();
(void) inb(com->line_status_port);
(void) inb(com->data_port);
com->last_modem_status =
com->prev_modem_status = inb(com->modem_status_port);
outb(iobase + com_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS
| IER_EMSC);
enable_intr();
if (!got_status)
com->last_modem_status = com->prev_modem_status;
if (com->prev_modem_status & MSR_DCD || FAKE_DCD(unit))
tp->t_state |= TS_CARR_ON;
} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) {
@ -734,9 +743,9 @@ sioopen(dev, flag, mode, p)
break;
}
out:
splx(s);
if (error == 0)
error = (*linesw[tp->t_line].l_open)(dev, tp, 0);
splx(s);
#ifdef COM_BIDIR
/* wakeup sleepers */
@ -768,14 +777,15 @@ sioclose(dev, flag, mode, p)
{
struct com_s *com;
struct tty *tp;
int s = spltty();
int s;
com = com_addr(UNIT(dev));
tp = com->tp;
s = spltty();
(*linesw[tp->t_line].l_close)(tp, flag);
siostop(tp, FREAD|FWRITE);
ttyclose(tp);
comhardclose(com);
ttyclose(tp);
splx(s);
return (0);
}
@ -818,8 +828,6 @@ comhardclose(com)
tsleep((caddr_t)&com->dtr_wait, TTIPRI,
"sioclose", com->dtr_wait);
}
com->last_modem_status =
com->prev_modem_status = inb(com->modem_status_port);
}
#ifdef COM_BIDIR

24
sys/isa/sio.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.38 1994/03/23 17:28:35 ache Exp $
* $Id: sio.c,v 1.39 1994/03/25 15:10:50 ache Exp $
*/
#include "sio.h"
@ -551,6 +551,7 @@ sioopen(dev, flag, mode, p)
#ifdef COM_BIDIR
bool_t callout;
#endif /* COM_BIDIR */
bool_t got_status = FALSE;
struct com_s *com;
int error = 0;
Port_t iobase;
@ -576,6 +577,7 @@ sioopen(dev, flag, mode, p)
#ifdef COM_BIDIR
bidir_open_top:
got_status = FALSE;
/* if it's bidirectional, we've gotta deal with it... */
if (com->bidir) {
if (callout) {
@ -608,7 +610,13 @@ sioopen(dev, flag, mode, p)
/* else take it from the top */
goto bidir_open_top;
}
} else if (com->prev_modem_status & MSR_DCD
}
disable_intr();
com->last_modem_status =
com->prev_modem_status = inb(com->modem_status_port);
enable_intr();
got_status = TRUE;
if (com->prev_modem_status & MSR_DCD
|| FAKE_DCD(unit)) {
/* there's a carrier on the line; we win */
com->active_in = TRUE;
@ -707,11 +715,12 @@ sioopen(dev, flag, mode, p)
disable_intr();
(void) inb(com->line_status_port);
(void) inb(com->data_port);
com->last_modem_status =
com->prev_modem_status = inb(com->modem_status_port);
outb(iobase + com_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS
| IER_EMSC);
enable_intr();
if (!got_status)
com->last_modem_status = com->prev_modem_status;
if (com->prev_modem_status & MSR_DCD || FAKE_DCD(unit))
tp->t_state |= TS_CARR_ON;
} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) {
@ -734,9 +743,9 @@ sioopen(dev, flag, mode, p)
break;
}
out:
splx(s);
if (error == 0)
error = (*linesw[tp->t_line].l_open)(dev, tp, 0);
splx(s);
#ifdef COM_BIDIR
/* wakeup sleepers */
@ -768,14 +777,15 @@ sioclose(dev, flag, mode, p)
{
struct com_s *com;
struct tty *tp;
int s = spltty();
int s;
com = com_addr(UNIT(dev));
tp = com->tp;
s = spltty();
(*linesw[tp->t_line].l_close)(tp, flag);
siostop(tp, FREAD|FWRITE);
ttyclose(tp);
comhardclose(com);
ttyclose(tp);
splx(s);
return (0);
}
@ -818,8 +828,6 @@ comhardclose(com)
tsleep((caddr_t)&com->dtr_wait, TTIPRI,
"sioclose", com->dtr_wait);
}
com->last_modem_status =
com->prev_modem_status = inb(com->modem_status_port);
}
#ifdef COM_BIDIR