diff options
| author | KATO Takenori <kato@FreeBSD.org> | 1997-02-02 08:09:41 +0000 |
|---|---|---|
| committer | KATO Takenori <kato@FreeBSD.org> | 1997-02-02 08:09:41 +0000 |
| commit | 59e8efa1102e9ccae2cd672d4c1390b0e2f9c220 (patch) | |
| tree | 21e63c05666c4dabcc60cce871086e8f93a55200 /sys | |
| parent | e91c4f7cc301262a34b7ab92db7f87fd5bf145b8 (diff) | |
Notes
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/pc98/cbus/sio.c | 18 | ||||
| -rw-r--r-- | sys/pc98/pc98/sio.c | 18 |
2 files changed, 30 insertions, 6 deletions
diff --git a/sys/pc98/cbus/sio.c b/sys/pc98/cbus/sio.c index 1e2adce73375..8183adecd2f6 100644 --- a/sys/pc98/cbus/sio.c +++ b/sys/pc98/cbus/sio.c @@ -1444,11 +1444,22 @@ open_top: outb(iobase + com_fifo, FIFO_RCV_RST | FIFO_XMT_RST | com->fifo_image); - DELAY(100); + /* + * XXX the delays are for superstitious + * historical reasons. It must be less than + * the character time at the maximum + * supported speed (87 usec at 115200 bps + * 8N1). Otherwise we might loop endlessly + * if data is streaming in. We used to use + * delays of 100. That usually worked + * because DELAY(100) used to usually delay + * for about 85 usec instead of 100. + */ + DELAY(50); if (!(inb(com->line_status_port) & LSR_RXRDY)) break; outb(iobase + com_fifo, 0); - DELAY(100); + DELAY(50); (void) inb(com->data_port); } } @@ -1576,7 +1587,8 @@ comhardclose(com) s = spltty(); com->poll = FALSE; com->poll_output = FALSE; - com->do_timestamp = 0; + com->do_timestamp = FALSE; + com->do_dcd_timestamp = FALSE; #ifdef PC98 if(IS_8251(com->pc98_if_type)) com_send_break_off(com); diff --git a/sys/pc98/pc98/sio.c b/sys/pc98/pc98/sio.c index 1e2adce73375..8183adecd2f6 100644 --- a/sys/pc98/pc98/sio.c +++ b/sys/pc98/pc98/sio.c @@ -1444,11 +1444,22 @@ open_top: outb(iobase + com_fifo, FIFO_RCV_RST | FIFO_XMT_RST | com->fifo_image); - DELAY(100); + /* + * XXX the delays are for superstitious + * historical reasons. It must be less than + * the character time at the maximum + * supported speed (87 usec at 115200 bps + * 8N1). Otherwise we might loop endlessly + * if data is streaming in. We used to use + * delays of 100. That usually worked + * because DELAY(100) used to usually delay + * for about 85 usec instead of 100. + */ + DELAY(50); if (!(inb(com->line_status_port) & LSR_RXRDY)) break; outb(iobase + com_fifo, 0); - DELAY(100); + DELAY(50); (void) inb(com->data_port); } } @@ -1576,7 +1587,8 @@ comhardclose(com) s = spltty(); com->poll = FALSE; com->poll_output = FALSE; - com->do_timestamp = 0; + com->do_timestamp = FALSE; + com->do_dcd_timestamp = FALSE; #ifdef PC98 if(IS_8251(com->pc98_if_type)) com_send_break_off(com); |