February 4, 1999 SPIF 4

### NAME

spif - SBus (spiffy) Serial/Parallel Interface

### SYNOPSIS

spif* at sbus? slot ? offset ? (sun4c/sun4m) stty* at spif? (sun4c/sun4m) sbpp* at spif? (sun4c/sun4m)

### 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

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 driver was first supported in OpenBSD2.5.

### 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.