linux/Documentation/moxa-smartio

=============================================================================

	MOXA Smartio Family Device Driver Ver 1.1 Installation Guide
		    for Linux Kernel 2.2.x and 2.0.3x
	       Copyright (C) 1999, Moxa Technologies Co, Ltd.
=============================================================================
Content

1. Introduction
2. System Requirement
3. Installation
4. Utilities
5. Setserial
6. Troubleshooting

-----------------------------------------------------------------------------
1. Introduction

   The Smartio family Linux driver, Ver. 1.1, supports following multiport
   boards.

    -C104P/H/HS, C104H/PCI, C104HS/PCI, CI-104J 4 port multiport board.
    -C168P/H/HS, C168H/PCI 8 port multiport board.

   This driver has been modified a little and cleaned up from the Moxa
   contributed driver code and merged into Linux 2.2.14pre. In particular
   official major/minor numbers have been assigned which are different to
   those the original Moxa supplied driver used.

   This driver and installation procedure have been developed upon Linux Kernel
   2.2.5 and backward compatible to 2.0.3x. This driver supports Intel x86 and
   Alpha hardware platform. In order to maintain compatibility, this version
   has also been properly tested with RedHat, OpenLinux, TurboLinux and
   S.u.S.E Linux. However, if compatibility problem occurs, please contact
   Moxa at support@moxa.com.tw.

   In addition to device driver, useful utilities are also provided in this
   version. They are
    - msdiag     Diagnostic program for detecting installed Moxa Smartio boards.
    - msmon      Monitor program to observe data count and line status signals.
    - msterm     A simple terminal program which is useful in testing serial
	         ports.
    - io-irq.exe Configuration program to setup ISA boards. Please note that
                 this program can only be executed under DOS.

   All the drivers and utilities are published in form of source code under
   GNU General Public License in this version. Please refer to GNU General
   Public License announcement in each source code file for more detail.

   In Moxa's ftp sites, you may always find latest driver at
   ftp://ftp.moxa.com  or ftp://ftp.moxa.com.tw.

   This version of driver can be installed as Loadable Module (Module driver)
   or built-in into kernel (Static driver). You may refer to following
   installation procedure for suitable one. Before you install the driver,
   please refer to hardware installation procedure in the User's Manual.

   We assume the user should be familiar with following documents.
   - Serial-HOWTO
   - Kernel-HOWTO

-----------------------------------------------------------------------------
2. System Requirement
   - Hardware platform: Intel x86 or Alpha machine
   - Kernel version: 2.0.3x or 2.2.x
   - gcc version 2.72 or later
   - Maximum 4 boards can be installed in combination

-----------------------------------------------------------------------------
3. Installation

   3.1 Hardware installation

       There are two types of buses, ISA and PCI, for Smartio family multiport
       board.

       ISA board
       ---------
       You'll have to configure CAP address, I/O address, Interrupt Vector
       as well as IRQ before installing this driver. Please refer to hardware
       installation procedure in User's Manual before proceed any further.
       Please make sure the JP1 is open after the ISA board is set properly.

       PCI board
       ---------
       You may need to adjust IRQ usage in BIOS to avoid from IRQ conflict
       with other ISA devices. Please refer to hardware installation
       procedure in User's Manual in advance.

       IRQ Sharing
       -----------
       Each port within the same multiport board shares the same IRQ. Up to
       4 Moxa Smartio Family multiport boards can be installed together on
       one system and they can share the same IRQ.

   3.2 Driver files and device naming convention

       The driver file may be obtained from ftp, CD-ROM or floppy disk. The
       first step, anyway, is to copy driver file "mxser.tgz" into specified
       directory. e.g. /moxa. The execute commands as below.

       # cd /moxa
       # tar xvf /dev/fd0 
       or
       # cd /moxa
       # cp /mnt/cdrom/<driver directory>/mxser.tgz .
       # tar xvfz mxser.tgz

       You may find all the driver and utilities files in /moxa/mxser.
       Following installation procedure depends on the model you'd like to
       run the driver. If you prefer module driver, please refer to 3.3.
       If static driver is required, please refer to 3.4.

       Dialin and callout port
       -----------------------
       This driver remains traditional serial device properties. There're
       two special file name for each serial port. One is dial-in port
       which is named "ttyMxx". For callout port, the naming convention
       is "cumxx".

       Device naming when more than 2 boards installed
       -----------------------------------------------
       Naming convention for each Smartio multiport board is pre-defined
       as below.

       Board Num.	 Dial-in Port	      Callout port
       1st board	ttyM0  - ttyM7	      cum0  - cum7
       2nd board	ttyM8  - ttyM15       cum8  - cum15
       3rd board	ttyM16 - ttyM23       cum16 - cum23
       4th board	ttyM24 - ttym31       cum24 - cum31

       Board sequence
       --------------
       This driver will activate ISA boards according to the parameter set
       in the driver. After all specified ISA board activated, PCI board
       will be installed in the system automatically driven.
       Therefore the board number is sorted by the CAP address of ISA boards.
       For PCI boards, their sequence will be after ISA boards and C168H/PCI
       has higher priority than C104H/PCI boards.

   3.3 Module driver configuration
       Module driver is easiest way to install. If you prefer static driver
       installation, please skip this paragraph.
       1. Find "Makefile" in /moxa/mxser, then run

	  # make install

	  The driver files "mxser.o" and utilities will be properly compiled
	  and copied to system directories respectively.Then run

	  # insmod mxser

	  to activate the modular driver. You may run "lsmod" to check
	  if "mxser.o" is activated.

       2. Create special files by executing "msmknod".
	  # cd /moxa/mxser/driver
	  # ./msmknod

	  Default major numbers for dial-in device and callout device are
	  174, 175. Msmknod will delete any special files occupying the same
	  device naming.

       3. Up to now, you may manually execute "insmod mxser" to activate
	  this driver and run "rmmod mxser" to remove it. However, it's
	  better to have a boot time configuration to eliminate manual
	  operation.
	  Boot time configuration can be achieved by rc file. Run following
	  command for setting rc files.

	  # cd /moxa/mxser/driver
	  # cp ./rc.mxser /etc/rc.d
	  # cd /etc/rc.d

	  You may have to modify part of the content in rc.mxser to specify
          parameters for ISA board. Please refer to rc.mxser for more detail.
          Find "rc.serial". If "rc.serial" doesn't exist, create it by vi.
	  Add "rc.mxser" in last line. Next, open rc.local by vi
	  and append following content.

	  if [ -f /etc/rc.d/rc.serial ]; then
	     sh /etc/rc.d/rc.serial
	  fi

       4. Reboot and check if mxser.o activated by "lsmod" command.
       5. If you'd like to drive Smartio ISA boards in the system, you'll
	  have to add parameter to specify CAP address of given board while
          activating "mxser.o". The format for parameters are as follows.

	  insmod mxser ioaddr=0x???,0x???,0x???,0x???
				|      |     |	  |
				|      |     |	  +- 4th ISA board
				|      |     +------ 3rd ISA board
				|      +------------ 2nd ISA board
				+------------------- 1st ISA board

   3.4 Static driver configuration

       1. Create link
	  # cd /usr/src/linux/drivers/char
	  # ln -s /moxa/mxser/driver/mxser.c mxser.c

       2. Add CAP address list for ISA boards
	  In module mode, the CAP address for ISA board is given by
	  parameter. In static driver configuration, you'll have to
	  assign it within driver's source code. If you will not
	  install any ISA boards, you may skip to next portion.
	  The instructions to modify driver source code are as
	  below.
	  a. # cd /moxa/mxser/driver
	     # vi mxser.c
	  b. Find the array mxserBoardCAP[] as below.

	     static int mxserBoardCAP[]
	     = {0x00, 0x00, 0x00, 0x00};

	  c. Change the address within this array using vi. For
	     example, to driver 2 ISA boards with CAP address
	     0x280 and 0x180 as 1st and 2nd board. Just to change
	     the source code as follows.

	     static int mxserBoardCAP[]
	     = {0x280, 0x180, 0x00, 0x00};

       3. Modify tty_io.c
	  # cd /usr/src/linux/drivers/char/
	  # vi tty_io.c
	    Find pty_init(), insert "mxser_init()" as

	    pty_init();
	    mxser_init();

       4. Modify tty.h
	  # cd /usr/src/linux/include/linux
	  # vi tty.h
	    Find extern int tty_init(void), insert "mxser_init()" as

	    extern int tty_init(void);
	    extern int mxser_init(void);
     
       5. Modify Makefile
	  # cd /usr/src/linux/drivers/char
	  # vi Makefile
	    Find L_OBJS := tty_io.o ...... random.o, add
	    "mxser.o" at last of this line as
	    L_OBJS := tty_io.o ....... mxser.o

       6. Rebuild kernel
	  The following are for Linux kernel rebuilding,for your reference only.
	  For appropriate details, please refer to the Linux document.

	  If 'lilo' utility is installed, please use 'make zlilo' to rebuild
	  kernel. If 'lilo' is not installed, please follow the following steps.

	   a. cd /usr/src/linux
	   b. make clean			     /* take a few minutes */
	   c. make bzImage		   /* take probably 10-20 minutes */
	   d. Backup original boot kernel.		  /* optional step */
	   e. cp /usr/src/linux/arch/i386/boot/bzImage /boot/vmlinuz
	   f. Please make sure the boot kernel (vmlinuz) is in the
	      correct position. If you use 'lilo' utility, you should
	      check /etc/lilo.conf 'image' item specified the path
	      which is the 'vmlinuz' path, or you will load wrong
	      (or old) boot kernel image (vmlinuz).
	   g. chmod 400 /vmlinuz
	   h. lilo
	   i. rdev -R /vmlinuz 1
	   j. sync

	  Note that if the result of "make zImage" is ERROR, then you have to
	  go back to Linux configuration Setup. Type "make config" in directory
	  /usr/src/linux or "setup".

	  Since system include file, /usr/src/linux/include/linux/interrupt.h,
	  is modified each time the MOXA driver is installed, kernel rebuilding
	  is inevitable. And it takes about 10 to 20 minutes depends on the
	  machine.

       7. Make utility
	  # cd /moxa/mxser/utility
	  # make install
       
       8. Make special file
          # cd /moxa/mxser/driver
          # ./msmknod

       9. Reboot

   3.5 Custom configuration
       Although this driver already provides you default configuration, you
       still can change the device name and major number.The instruction to
       change these parameters are shown as below.

       Change Device name
       ------------------
       If you'd like to use other device names instead of default naming
       convention, all you have to do is to modify the internal code
       within the shell script "msmknod". First, you have to open "msmknod"
       by vi. Locate each line contains "ttyM" and "cum" and change them
       to the device name you desired. "msmknod" creates the device names
       you need next time executed.

       Change Major number
       -------------------
       If major number 30 and 35 had been occupied, you may have to select
       2 free major numbers for this driver. There are 3 steps to change
       major numbers.

       1. Find free major numbers
	  In /proc/devices, you may find all the major numbers occupied
	  in the system. Please select 2 major numbers that are available.
	  e.g. 40, 45.
       2. Create special files
	  Run /moxa/mxser/driver/msmknod to create special files with
	  specified major numbers.
       3. Modify driver with new major number
	  Run vi to open /moxa/mxser/driver/mxser.c. Locate the line
	  contains "MXSERMAJOR". Change the content as below.
	  #define	  MXSERMAJOR		  40
	  #define	  MXSERCUMAJOR		  45
       4. Run # make install in /moxa/mxser/driver.

   3.6 Verify driver installation
       You may refer to /var/log/messages to check the latest status
       log reported by this driver whenever it's activated.
-----------------------------------------------------------------------------
4. Utilities
   There are 3 utilities contained in this driver. They are msdiag, msmon and
   msterm. These 3 utilities are released in form of source code. They should
   be compiled into executable file and copied into /usr/bin.

   msdiag - Diagnostic
   --------------------
   This utility provides the function to detect what Moxa Smartio multiport
   board exists in the system.

   msmon - Port Monitoring
   -----------------------
   This utility gives the user a quick view about all the MOXA ports'
   activities. One can easily learn each port's total received/transmitted
   (Rx/Tx) character count since the time when the monitoring is started.
   Rx/Tx throughputs per second are also reported in interval basis (e.g.
   the last 5 seconds) and in average basis (since the time the monitoring
   is started). You can reset all ports' count by <HOME> key. <+> <->
   (plus/minus) keys to change the displaying time interval. Press <ENTER>
   on the port, that cursor stay, to view the port's communication
   parameters, signal status, and input/output queue.

   msterm - Terminal Emulation
   ---------------------------
   This utility provides data sending and receiving ability of all tty ports,
   especially for MOXA ports. It is quite useful for testing simple
   application, for example, sending AT command to a modem connected to the
   port or used as a terminal for login purpose. Note that this is only a
   dumb terminal emulation without handling full screen operation.
-----------------------------------------------------------------------------
5. Setserial

   Supported Setserial parameters are listed as below.

   uart 	  set UART type(16450-->disable FIFO, 16550A-->enable FIFO)
   close_delay	  set the amount of time(in 1/100 of a second) that DTR
		  should be kept low while being closed.
   closing_wait   set the amount of time(in 1/100 of a second) that the
		  serial port should wait for data to be drained while
		  being closed, before the receiver is disable.
   spd_hi	  Use  57.6kb  when  the application requests 38.4kb.
   spd_vhi	  Use  115.2kb	when  the application requests 38.4kb.
   spd_normal	  Use  38.4kb  when  the application requests 38.4kb.

-----------------------------------------------------------------------------
6. Troubleshooting

   The boot time error messages and solutions are stated as clearly as
   possible. If all the possible solutions fail, please contact our technical
   support team to get more help.

   Error msg: More than 4 Moxa Smartio family boards found. Fifth board and
	      after are ignored.
   Solution:
   To avoid this problem, please unplug fifth and after board, because Moxa
   driver supports up to 4 boards.

   Error msg: Request_irq fail, IRQ(?) may be conflict with another device.
   Solution:
   Other PCI or ISA devices occupy the assigned IRQ. If you are not sure
   which device causes the situation,please check /proc/interrupts to find
   free IRQ and simply change another free IRQ for Moxa board.

   Error msg: Board #: C1xx Series(CAP=xxx) interrupt number invalid.
   Solution:
   Each port within the same multiport board shares the same IRQ. Please set
   one IRQ (IRQ doesn't equal to zero) for one Moxa board.

   Error msg: No interrupt vector be set for Moxa ISA board(CAP=xxx).
   Solution:
   Moxa ISA board needs an interrupt vector.Please refer to user's manual
   "Hardware Installation" chapter to set interrupt vector.

   Error msg: Couldn't install MOXA Smartio family driver!
   Solution:
   Load Moxa driver fail, the major number may conflict with other devices.
   Please refer to previous section 3.5 to change a free major number for
   Moxa driver.

   Error msg: Couldn't install MOXA Smartio family callout driver!
   Solution:
   Load Moxa callout driver fail, the callout device major number may
   conflict with other devices. Please refer to previous section 3.5 to
   change a free callout device major number for Moxa driver.
-----------------------------------------------------------------------------