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The Linux Digiboard Driver

--------------------------

The Digiboard Driver for Linux supports the following boards:

 DigiBoard PC/Xe, PC/Xi, PC/Xeve

Limitations:

------------

Currently the Driver does not do autoprobing!

The preconfigured I/O address is 0200h and the default memory address

0D0000h, ALT-PIN feature on and 16 ports available.

Use them and you will not have to worry about configuring anything.

You can configure the driver via lilo. Have a look at the end of this

message. The default settings vanish as soon as you give a digi= commandline.

You can give multiple digi= commandline parameters to define multiple

boards.

Supporting Tools:

-----------------

Some tools and more detailed information can be found at

ftp://ftp.fuller.edu/Linux/digi

WARNING: Most of the stuff available right now uses the WRONG Major Device

numbers and the wrong call out devices. Be careful and check them first.

Better not use any of the software in that directory if you run a recent

1.3.X Kernel or later!

The "ditty" tool described in the Digiboard Manuals for other Unixes

is also available.

Currently the Linux MAKEDEV command does not support generating the Digiboard

Devices. Use the following script to generate the devices:

------------------ mkdigidev begin

#!/bin/sh

#

# Script to create Digiboard Devices

# Christoph Lameter, April 16, 1996

#

# Usage:

# mkdigidev []

#

DIGI_MAJOR=23

DIGICU_MAJOR=22

BOARDS=$1

if [ "$BOARDS" = "" ]; then

BOARDS=1

fi

boardnum=0

while [ $boardnum -lt $BOARDS ];

do

  for c in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15;

  do

        name=`expr $boardnum \* 16 + $c`

        mknod /dev/cud$name c $DIGICU_MAJOR $name

        mknod /dev/ttyD$name c $DIGI_MAJOR $name

  done

  boardnum=`expr $boardnum + 1`

done

------------------ mkdigidev end

or apply the following patch to /dev/MAKEDEV and do a

make digi

----- MAKEDEV Patch

--- /dev/MAKEDEV        Sun Aug 13 15:48:23 1995

+++ MAKEDEV     Tue Apr 16 17:53:27 1996

@@ -120,7 +120,7 @@

        while [ $# -ne 0 ]

        do

                case "$1" in

-                       mem|tty|ttyp|cua|cub)   ;;

+                       mem|tty|ttyp|cua|cub|cud)       ;;

                        hd)     echo hda hdb hdc hdd ;;

                        xd)     echo xda xdb ;;

                        fd)     echo fd0 fd1 ;;

@@ -140,6 +140,7 @@

                        dcf)            echo dcf ;;

                        pcmcia) ;; # taken care of by its own driver

                        ttyC)   echo cyclades ;;

+                       ttyD)   echo digi ;;

                        *)      echo "$0: don't know what \"$1\" is" >&2 ;;

                esac

                shift

@@ -208,6 +209,15 @@

                do

                        makedev ttyC$i c $major1 `expr 32 + $i` $tty

                        makedev cub$i c $major2 `expr 32 + $i` $dialout

+               done

+               ;;

+       digi)

+               major1=`Major ttyD` || continue

+               major2=`Major cud` || continue

+               for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

+               do

+                       makedev ttyD$i c $major1 `expr 32 + $i` $tty

+                       makedev cud$i c $major2 `expr 32 + $i` $dialout

                done

                ;;

        par[0-2])

----- End Makedev patch

The /dev/cud?? devices behave like the /dev/cua?? devices

and the ttyD devices are like the /dev/ttyS?? devices.

Sources of Information

----------------------

Webpage: http://private.fuller.edu/clameter/digi.html

Mailing List: digiboard@list.fuller.edu

(Write e-mail to that address to subscribe. Common ListServ commands work.

Archive of messages available)

Christoph Lameter (clameter@fuller.edu) 16. April 1996.

-----------------------------------------------------------------------------

Changes v1.5.5:

The ability to use the kernel's command line to pass in the configuration for

boards.  Using LILO's APPEND command, a string of comma separated identifiers

or integers can be used.  The 6 values in order are:

   Enable/Disable this card,

   Type of card: PC/Xi(0), PC/Xe(1), PC/Xeve(2), PC/Xem(3)

   Enable/Disable alternate pin arrangement,

   Number of ports on this card,

   I/O Port where card is configured (in HEX if using string identifiers),

   Base of memory window (in HEX if using string identifiers),

Samples:

   append="digi=E,PC/Xi,D,16,200,D0000"

   append="digi=1,0,0,16,512,(whatever D0000 is in base 10 :)

Driver's minor device numbers are conserved. This means that instead of

each board getting a block of 16 minors pre-assigned, it gets however

many it should, with the next card following directly behind it.  A

system with 4 2-port PC/Xi boards will use minor numbers 0-7.

This conserves some memory, and removes a few hard coded constants.

NOTE!! NOTE!! NOTE!!

The definition of PC/Xem as a valid board type is the BEGINNING of support

for this device.  The driver does not currently recognise the board, nor

does it want to initialize it.  At least not the EISA version.

Mike McLagan  5, April 1996.