NAME
spif —
SBus (spiffy) Serial/Parallel
Interface
SYNOPSIS
spif* at sbus? slot ? offset ? (sun4c/sun4m/sun4u)
stty* at spif? (sun4c/sun4m/sun4u)
sbpp* at spif? (sun4c/sun4m/sun4u)
DESCRIPTION
The
spif driver provides support for the Sun Serial/Parallel
Interface card (Sun part number 501-1931), which is based on the Cirrus Logic
CD180 octal serial controller and the Cirrus Logic PPC2 parallel port
controller.
The device minor numbers for this driver are encoded as follows:
+---+---+---+---+---+---+---+---+
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+---+---+---+---+---+---+---+---+
| | | | | | | |
| | | | | +---+---+---> port number
| | | | |
| | | | +---------------> unused
| | | |
| | | +-------------------> dial-out (on tty ports)
| | |
| | +-----------------------> unused
| |
+---+---------------------------> card number
Up to four cards are supported in the system.
Each of the serial ports has an 8 byte FIFO for receive and transmit as well as
automatic hardware (RTS/CTS) flow control.
FILES
- /dev/ttyS[0123][0-7]
- Serial ports
- /dev/bppS[0-3]
- Parallel ports
DIAGNOSTICS
- spif%d: ccr timeout
- A timeout occurred while writing to one of the CD180
registers.
- stty%d-%d: ring overflow
- Incoming characters were discarded because the application
in control of the device did not read the input fast enough.
SEE ALSO
intro(4),
sbus(4),
tty(4)
HISTORY
The
spif adapter was first supported in
OpenBSD 2.5. The driver was ported to
NetBSD 3.0.
AUTHORS
The driver was written by
Jason Wright
<
jason@thought.net>,
and is heavily based on the
magma(4) driver written by
Iain Hibbert.
TODO
The parallel port is not supported yet.
Dial-out (cua) devices are not yet supported.