SPIF(4) - Device Drivers Manual (sparc64) #

SPIF(4) - Device Drivers Manual (sparc64)

NAME #

spif - SBus (spiffy) Serial/Parallel Interface

SYNOPSIS #

spif* at sbus? stty* at spif? sbpp* at spif?

DESCRIPTION #

The spif driver provides support for the Sun Serial/Parallel Interface card (Sun part number 501-1931) based around 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/tty[jkl][0-7]

Serial ports

/dev/sbpp[0-3]

Parallel ports

DIAGNOSTICS #

spif0: ccr timeout A timeout occurred while writing to one of the CD180 registers.

stty0-N: 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 driver was first supported in OpenBSD 3.1.

AUTHORS #

The driver was written by Jason Wright <jason@thought.net>, and is heavily based on the magma(4) driver written by Iain Hibbert <plunky@skate.demon.co.uk>.

TODO #

The parallel port is not supported yet.

Dial-out (cua) devices are not yet supported.

OpenBSD 7.5 - July 16, 2013