The Linux Digiboard Driver -------------------------- The Digiboard Driver for Linux supports the following boards: DigiBoard PC/Xi, PC/Xe, PC/Xeve(which is the newer, smaller Xe with a 8K window which is also known as PC/Xe(8K) and has no memory/irq switches) You can use up to 4 cards with this driver and it should work on other architectures than intel also. In case you have problems with this version (1.6.1) of this driver, please email directly to me as I made the last update. It you have a report about running it on other architectures than intel, email me, so I can document it here. A version of this driver has been taken by Digiboard to make a driver software package which supports also PC/Xem cards and newer PCI cards but it doesn't support the old PC/Xi cards and it isn't yet ported to linux-2.1.x and may not be usable on other architectures than intel now. It is available from ftp.digi.com/ftp.digiboard.com. You can write me if you need an patch for this driver. Bernhard Kaindl (bkaindl@netway.at) 6. April 1997. Configuring the Driver ---------------------- The driver can be built direct into the kernel or as a module. The pcxx driver can be configured using the command line feature while loading the kernel with LILO or LOADLIN or, if built as a module, with arguments to insmod and modprobe or with parameters in /etc/conf.modules for modprobe and kerneld. After configuring the driver you need to create the device special files as described in "Device file creation:" below and set the appropriate permissions for your application. As Module --------- modprobe pcxx io= \ membase= \ memsize= \ numports= \ altpin= \ verbose= or, if several cards are installed modprobe pcxx io=,,... \ membase=,,... \ memsize=,,... \ numports=,,... \ altpin=,,... \ verbose= where is the io address of the Nth card and is the memory base address of the Nth card, etc. The parameters can be specified in any order. For example, the numports parameter can precede the membase parameter, or vice versa. If several cards are installed the ordering within the comma separated parameter lists must be consistent, of course. io - I/O port address of that card. membase - Memory start address of that card. memsize - Memory size of that card, in kilobytes. If given, this value is compared against the card to verify configuration and hinder the driver from using a misconfigured card. If the parameter does not match the board it is disabled with a memory size error. numports - Number of ports on this card. This is the number of devices to assign to this card or reserve if disabled. altpin - 1: swap DCD and DSR for 8-pin RJ-45 with modems. 0: don't swap DCD and DSR. other values count as 1. verbose - 1: give nice verbose output during initialisation of the driver, possibly helpful during board configuration. 0: normal terse output. Only the parameters which differ from the defaults need to be specified. If the io= parameter is not given, the default config is used. This is io=0x200 membase=0xD0000 numports=16 altpin=0 Only applicable parameters need be specified. For example to configure 2 boards, first one at 0x200 with 8 ports, rest defaults, second one at 0x120, memory at 0xD80000, altpin enabled, rest defaults, you can do this by using these parameters: modprobe pcxx io=0x200,0x120 numports=8,8 membase=,0xD80000 altpin=,1 To disable a temporary unusable board without changing the mapping of the devices following that board, you can empty the io-value for that board: modprobe pcxx io=,0x120 numports=8,8 membase=,0xD80000 altpin=,1 The remaining board still uses ttyD8-ttyD15 and cud8-cud15. Example line for /etc/conf.modules for use with kerneld and as default parameters for modprobe: options pcxx io=0x200 numports=8 For kerneld to work you will likely need to add these two lines to your /etc/conf.modules: alias char-major-22 pcxx alias char-major-23 pcxx Boot-time configuration when linked into the kernel --------------------------------------------------- Per board to be configured, pass a digi= command-line parameter to the kernel using lilo or loadlin. It consists of a string of comma separated identifiers or integers. The 6 values in order are: Card status: Enable - use that board Disable - don't actually use that board. Card type: PC/Xi - the old ones with 64/128/256/512K RAM. PC/Xe - PC/Xe(old ones with 64k mem range). PC/Xeve - PC/Xe(new ones with 8k mem range). Note: This is for documentation only, the type is detected from the board. Altpin setting: Enable - swap DCD and DSR for 8-pin RJ-45 with modems. Disable - don't swap DCD and DSR. Number of ports: 1 ... 16 - Number of ports on this card. This is the number of devices to assign to this card. I/O port address: eg. 200 - I/O Port address where the card is configured. Memory base addr: eg. 80000 - Memory address where the board's memory starts. This is an example for a line which you can insert into you lilo.conf: append="digi=Enable,PC/Xi,Disable,4,120,D0000" there is an alternate form, in which you must use decimal values only: append="digi=1,0,0,16,512,851968" If you don't give a digi= command line, the compiled-in defaults of board 1: io=0x200, membase=0xd0000, altpin=off and numports=16 are used. If you have the resources (io&mem) free for use, configure your board to these settings and you should be set up fine even if yours has not got 16 ports. Sources of Information ---------------------- Web page: 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. Supporting Tools ---------------- Some tools and more detailed information can be found at ftp://ftp.fuller.edu/Linux/digi The "ditty" tool described in the Digiboard Manuals for other Unixes is also available. Device file creation -------------------- Currently the Linux MAKEDEV command does not support generating the Digiboard Devices. The /dev/cud devices behave like the /dev/cua devices and the ttyD devices are like the /dev/ttyS 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 sh /dev/MAKEDEV 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 ----------------------------------------------------------------------------- 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 :) Drivers' 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.