CVS commit: src

[Bill Studenmund <wrstuden%netbsd.org@localhost>]

Module Name:    src
Committed By:   wrstuden
Date:           Mon Nov 23 22:10:10 UTC 1998

Modified Files:
        src/sys/dev/ic: z8530tty.c
Log Message:
Changes to deal with mac serial ports having clock sources on DCD or CTS.

- When doing a first open, don't enable receive & status interupts before
the MD layer has had a chance to set things up.
- Enable logic to only enable DCD/CTS interupts if we are looking for/
expecting interupts on those pins. Disable otherwise.
- in zs_param, only pass up the state of ZSRR0_DCD if we have enabled
interupts on that pin.

Henry Hotz (<hotz%jpl.nasa.gov@localhost>) and Greg walsh 
<gwalsh%artec.com@localhost> have
tried these changes to get certain printers from hanging at boot. They
work in a 1.3.2 kernel for Greg.