diff options
Diffstat (limited to 'sys/dev/cy/cy.c')
| -rw-r--r-- | sys/dev/cy/cy.c | 45 |
1 files changed, 28 insertions, 17 deletions
diff --git a/sys/dev/cy/cy.c b/sys/dev/cy/cy.c index 0c84e33..5a4805b 100644 --- a/sys/dev/cy/cy.c +++ b/sys/dev/cy/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 1.40 1996/10/14 16:10:00 davidg Exp $ + * $Id: cy.c,v 1.41 1996/10/14 16:43:11 davidg Exp $ */ #include "cy.h" @@ -1460,6 +1460,10 @@ sioioctl(dev, cmd, data, flag, p) case TIOCCDTR: (void)commctl(com, TIOCM_DTR, DMBIC); break; + /* + * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The + * changes get undone on the next call to comparam(). + */ case TIOCMSET: (void)commctl(com, *(int *)data, DMSET); break; @@ -1567,13 +1571,6 @@ repeat: * of input, so enable RTS if it is now disabled and * there is room in the high-level buffer. */ - /* - * XXX this used not to look at CS_RTS_IFLOW. The - * change is to allow full control of MCR_RTS via - * ioctls after turning CS_RTS_IFLOW off. Check - * for races. We shouldn't allow the ioctls while - * CS_RTS_IFLOW is on. - */ if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && !(tp->t_state & TS_TBLOCK)) @@ -1952,10 +1949,27 @@ comparam(tp, t) com->state &= ~CS_TTGO; if (!(tp->t_state & TS_TTSTOP)) com->state |= CS_TTGO; - if (cflag & CRTS_IFLOW) - com->state |= CS_RTS_IFLOW; /* XXX - secondary changes? */ - else + if (cflag & CRTS_IFLOW) { + com->state |= CS_RTS_IFLOW; + /* + * If CS_RTS_IFLOW just changed from off to on, the change + * needs to be propagated to MCR_RTS. This isn't urgent, + * so do it later by calling comstart() instead of repeating + * a lot of code from comstart() here. + */ + } else if (com->state & CS_RTS_IFLOW) { com->state &= ~CS_RTS_IFLOW; + /* + * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS + * on here, since comstart() won't do it later. + */ +#if 0 + outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); +#else + cd_outb(iobase, CD1400_MSVR1, com->cy_align, + com->mcr_image |= MCR_RTS); +#endif + } /* * Set up state to handle output flow control. @@ -1994,6 +2008,7 @@ comparam(tp, t) enable_intr(); splx(s); + comstart(tp); return (0); } @@ -2042,12 +2057,8 @@ comstart(tp) com->mcr_image &= ~MCR_RTS); #endif } else { - /* - * XXX don't raise MCR_RTS if CTS_RTS_IFLOW is off. Set it - * appropriately in comparam() if RTS-flow is being changed. - * Check for races. - */ - if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater) + if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater + && com->state & CS_RTS_IFLOW) #if 0 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); #else |
