diff options
| author | bde <bde@FreeBSD.org> | 1998-12-17 19:23:09 +0000 |
|---|---|---|
| committer | bde <bde@FreeBSD.org> | 1998-12-17 19:23:09 +0000 |
| commit | b3eb9623043dce7ee5235a8232a7f28c2f9aceff (patch) | |
| tree | 65986023559f40662101652799adef9643d57bc6 /sys/i386/isa/cy.c | |
| parent | d91789e59626a6d86471c19af25b9fadd021d984 (diff) | |
| download | FreeBSD-src-b3eb9623043dce7ee5235a8232a7f28c2f9aceff.zip FreeBSD-src-b3eb9623043dce7ee5235a8232a7f28c2f9aceff.tar.gz | |
Flush the tx fifo in cystop(). Now ttyflush() (and thus tcflush(3))
almost works properly. Unfortunately, there is no way to flush
the rx fifo without resetting the channel, which also flushes the
tx fifo. We avoid resetting even when both fifos need to be flushed,
since resetting seems to cause the rx to lose sync if it is done
while data is arriving.
Reminded by: NIST-PCTS
Diffstat (limited to 'sys/i386/isa/cy.c')
| -rw-r--r-- | sys/i386/isa/cy.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/sys/i386/isa/cy.c b/sys/i386/isa/cy.c index df09722..b23cf66 100644 --- a/sys/i386/isa/cy.c +++ b/sys/i386/isa/cy.c @@ -27,7 +27,7 @@ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * - * $Id: cy.c,v 1.78 1998/12/17 18:18:06 bde Exp $ + * $Id: cy.c,v 1.79 1998/12/17 18:43:08 bde Exp $ */ #include "opt_compat.h" @@ -2387,15 +2387,16 @@ siostop(tp, rw) com->state &= ~(CS_ODONE | CS_BUSY); } if (rw & FREAD) { + /* XXX no way to reset only input fifo. */ com_events -= (com->iptr - com->ibuf); com->iptr = com->ibuf; } enable_intr(); if (wakeup_etc) wakeup(&com->etc); + if (rw & FWRITE && com->etc == ETC_NONE) + cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF); comstart(tp); - - /* XXX should clear h/w fifos too. */ } static struct tty * |
