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Synchronize with sys/i386/isa/sio.c revision 1.163.
This commit is contained in:
KATO Takenori
parent
25070303ca
commit
3238d14c9e
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=25026
@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)com.c 7.5 (Berkeley) 5/16/91
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* $Id: sio.c,v 1.20 1997/03/24 12:29:41 bde Exp $
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* $Id: sio.c,v 1.21 1997/04/05 15:04:32 kato Exp $
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*/
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#include "opt_comconsole.h"
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@ -228,6 +228,7 @@
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#define CS_DTR_OFF 0x10 /* DTR held off */
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#define CS_ODONE 4 /* output completed */
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#define CS_RTS_IFLOW 8 /* use RTS input flow control */
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#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */
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static char const * const error_desc[] = {
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#define CE_OVERRUN 0
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@ -261,6 +262,7 @@ struct com_s {
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#ifdef COM_ESP
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bool_t esp; /* is this unit a hayes esp board? */
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#endif
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u_char extra_state; /* more flag bits, separate for order trick */
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u_char fifo_image; /* copy of value written to FIFO */
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bool_t hasfifo; /* nonzero for 16550 UARTs */
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bool_t loses_outints; /* nonzero if device loses output interrupts */
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@ -1644,7 +1646,7 @@ comhardclose(com)
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else
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#endif
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(void)commctl(com, TIOCM_DTR, DMBIC);
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if (com->dtr_wait != 0) {
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if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) {
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timeout(siodtrwakeup, com, com->dtr_wait);
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com->state |= CS_DTR_OFF;
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}
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@ -1731,14 +1733,14 @@ siobusycheck(chan)
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/*
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* Clear TS_BUSY if low-level output is complete.
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* spl locking is sufficient because siointr1() does not set CS_BUSY.
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* If siointr() clears CS_BUSY after we look at it, then we'll get
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* If siointr1() clears CS_BUSY after we look at it, then we'll get
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* called again. Reading the line status port outside of siointr1()
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* is safe because CS_BUSY is clear so there are no output interrupts
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* to lose.
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*/
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s = spltty();
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if (com->state & CS_BUSY)
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; /* False alarm. */
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com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */
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#ifdef PC98
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else if (IS_8251(com->pc98_if_type) &&
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(inb(com->sts_port) & (STS8251_TxRDY | STS8251_TxEMP))
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@ -1751,6 +1753,7 @@ siobusycheck(chan)
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#endif
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com->tp->t_state &= ~TS_BUSY;
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ttwwakeup(com->tp);
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com->extra_state &= ~CSE_BUSYCHECK;
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} else
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timeout(siobusycheck, com, hz / 100);
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splx(s);
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@ -2396,8 +2399,11 @@ repeat:
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com_events -= LOTS_OF_EVENTS;
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com->state &= ~CS_ODONE;
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enable_intr();
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if (!(com->state & CS_BUSY))
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if (!(com->state & CS_BUSY)
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&& !(com->extra_state & CSE_BUSYCHECK)) {
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timeout(siobusycheck, com, hz / 100);
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com->extra_state |= CSE_BUSYCHECK;
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}
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(*linesw[tp->t_line].l_start)(tp);
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}
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if (incc <= 0 || !(tp->t_state & TS_ISOPEN) ||
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@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)com.c 7.5 (Berkeley) 5/16/91
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* $Id: sio.c,v 1.20 1997/03/24 12:29:41 bde Exp $
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* $Id: sio.c,v 1.21 1997/04/05 15:04:32 kato Exp $
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*/
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#include "opt_comconsole.h"
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@ -228,6 +228,7 @@
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#define CS_DTR_OFF 0x10 /* DTR held off */
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#define CS_ODONE 4 /* output completed */
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#define CS_RTS_IFLOW 8 /* use RTS input flow control */
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#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */
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static char const * const error_desc[] = {
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#define CE_OVERRUN 0
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@ -261,6 +262,7 @@ struct com_s {
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#ifdef COM_ESP
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bool_t esp; /* is this unit a hayes esp board? */
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#endif
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u_char extra_state; /* more flag bits, separate for order trick */
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u_char fifo_image; /* copy of value written to FIFO */
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bool_t hasfifo; /* nonzero for 16550 UARTs */
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bool_t loses_outints; /* nonzero if device loses output interrupts */
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@ -1644,7 +1646,7 @@ comhardclose(com)
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else
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#endif
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(void)commctl(com, TIOCM_DTR, DMBIC);
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if (com->dtr_wait != 0) {
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if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) {
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timeout(siodtrwakeup, com, com->dtr_wait);
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com->state |= CS_DTR_OFF;
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}
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@ -1731,14 +1733,14 @@ siobusycheck(chan)
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/*
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* Clear TS_BUSY if low-level output is complete.
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* spl locking is sufficient because siointr1() does not set CS_BUSY.
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* If siointr() clears CS_BUSY after we look at it, then we'll get
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* If siointr1() clears CS_BUSY after we look at it, then we'll get
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* called again. Reading the line status port outside of siointr1()
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* is safe because CS_BUSY is clear so there are no output interrupts
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* to lose.
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*/
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s = spltty();
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if (com->state & CS_BUSY)
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; /* False alarm. */
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com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */
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#ifdef PC98
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else if (IS_8251(com->pc98_if_type) &&
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(inb(com->sts_port) & (STS8251_TxRDY | STS8251_TxEMP))
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@ -1751,6 +1753,7 @@ siobusycheck(chan)
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#endif
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com->tp->t_state &= ~TS_BUSY;
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ttwwakeup(com->tp);
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com->extra_state &= ~CSE_BUSYCHECK;
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} else
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timeout(siobusycheck, com, hz / 100);
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splx(s);
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@ -2396,8 +2399,11 @@ repeat:
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com_events -= LOTS_OF_EVENTS;
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com->state &= ~CS_ODONE;
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enable_intr();
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if (!(com->state & CS_BUSY))
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if (!(com->state & CS_BUSY)
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&& !(com->extra_state & CSE_BUSYCHECK)) {
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timeout(siobusycheck, com, hz / 100);
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com->extra_state |= CSE_BUSYCHECK;
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}
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(*linesw[tp->t_line].l_start)(tp);
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}
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if (incc <= 0 || !(tp->t_state & TS_ISOPEN) ||
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