computone.txt

《嵌入式系统设计与实例开发实验教材二源码》Linux内核移植与编译实验

 

7. NOTES

This is a release version of the driver, but it is impossible to test it
in all configurations of Linux. If there is any anomalous behaviour that 
does not match the standard serial port's behaviour please let us know.


8. ip2mkdev shell script

Previously, this script was simply attached here.  It is now attached as a
shar archive to make it easier to extract the script from the documentation.
To create the ip2mkdev shell script change to a convenient directory (/tmp
works just fine) and run the following command:

	unshar /usr/src/linux/Documentation/computone.txt
		(This file)

You should now have a file ip2mkdev in your current working directory with
permissions set to execute.  Running that script with then create the
necessary devices for the Computone boards, interfaces, and ports which
are present on you system at the time it is run.


#!/bin/sh
# This is a shell archive (produced by GNU sharutils 4.2.1).
# To extract the files from this archive, save it to some FILE, remove
# everything before the `!/bin/sh' line above, then type `sh FILE'.
#
# Made on 2001-10-29 10:32 EST by <[e-mail]>.
# Source directory was `/home2/src/tmp'.
#
# Existing files will *not* be overwritten unless `-c' is specified.
#
# This shar contains:
# length mode       name
# ------ ---------- ------------------------------------------
#   4251 -rwxr-xr-x ip2mkdev
#
save_IFS="${IFS}"
IFS="${IFS}:"
gettext_dir=FAILED
locale_dir=FAILED
first_param="$1"
for dir in $PATH
do
  if test "$gettext_dir" = FAILED && test -f $dir/gettext \
     && ($dir/gettext --version >/dev/null 2>&1)
  then
    set `$dir/gettext --version 2>&1`
    if test "$3" = GNU
    then
      gettext_dir=$dir
    fi
  fi
  if test "$locale_dir" = FAILED && test -f $dir/shar \
     && ($dir/shar --print-text-domain-dir >/dev/null 2>&1)
  then
    locale_dir=`$dir/shar --print-text-domain-dir`
  fi
done
IFS="$save_IFS"
if test "$locale_dir" = FAILED || test "$gettext_dir" = FAILED
then
  echo=echo
else
  TEXTDOMAINDIR=$locale_dir
  export TEXTDOMAINDIR
  TEXTDOMAIN=sharutils
  export TEXTDOMAIN
  echo="$gettext_dir/gettext -s"
fi
if touch -am -t 200112312359.59 $$.touch >/dev/null 2>&1 && test ! -f 200112312359.59 -a -f $$.touch; then
  shar_touch='touch -am -t $1$2$3$4$5$6.$7 "$8"'
elif touch -am 123123592001.59 $$.touch >/dev/null 2>&1 && test ! -f 123123592001.59 -a ! -f 123123592001.5 -a -f $$.touch; then
  shar_touch='touch -am $3$4$5$6$1$2.$7 "$8"'
elif touch -am 1231235901 $$.touch >/dev/null 2>&1 && test ! -f 1231235901 -a -f $$.touch; then
  shar_touch='touch -am $3$4$5$6$2 "$8"'
else
  shar_touch=:
  echo
  $echo 'WARNING: not restoring timestamps.  Consider getting and'
  $echo "installing GNU \`touch', distributed in GNU File Utilities..."
  echo
fi
rm -f 200112312359.59 123123592001.59 123123592001.5 1231235901 $$.touch
#
if mkdir _sh17581; then
  $echo 'x -' 'creating lock directory'
else
  $echo 'failed to create lock directory'
  exit 1
fi
# ============= ip2mkdev ==============
if test -f 'ip2mkdev' && test "$first_param" != -c; then
  $echo 'x -' SKIPPING 'ip2mkdev' '(file already exists)'
else
  $echo 'x -' extracting 'ip2mkdev' '(text)'
  sed 's/^X//' << 'SHAR_EOF' > 'ip2mkdev' &&
#!/bin/sh -
#
#	ip2mkdev
#
#	Make or remove devices as needed for Computone Intelliport drivers
#
#	First rule!  If the dev file exists and you need it, don't mess
#	with it.  That prevents us from screwing up open ttys, ownership
#	and permissions on a running system!
#
#	This script will NOT remove devices that no longer exist if their
#	board or interface box has been removed.  If you want to get rid
#	of them, you can manually do an "rm -f /dev/ttyF* /dev/cuaf*"
#	before running this script.  Running this script will then recreate
#	all the valid devices.
#
#	Michael H. Warfield
#	/\/\|=mhw=|\/\/
#	[e-mail]
#
#	Updated 10/29/2000 for version 1.2.13 naming convention
#		under devfs.	/\/\|=mhw=|\/\/
#
#	Updated 03/09/2000 for devfs support in ip2 drivers. /\/\|=mhw=|\/\/
#
X
if test -d /dev/ip2 ; then
#	This is devfs mode...  We don't do anything except create symlinks
#	from the real devices to the old names!
X	cd /dev
X	echo "Creating symbolic links to devfs devices"
X	for i in `ls ip2` ; do
X		if test ! -L ip2$i ; then
X			# Remove it incase it wasn't a symlink (old device)
X			rm -f ip2$i
X			ln -s ip2/$i ip2$i
X		fi
X	done
X	for i in `( cd tts ; ls F* )` ; do
X		if test ! -L tty$i ; then
X			# Remove it incase it wasn't a symlink (old device)
X			rm -f tty$i
X			ln -s tts/$i tty$i
X		fi
X	done
X	for i in `( cd cua ; ls F* )` ; do
X		DEVNUMBER=`expr $i : 'F\(.*\)'`
X		if test ! -L cuf$DEVNUMBER ; then
X			# Remove it incase it wasn't a symlink (old device)
X			rm -f cuf$DEVNUMBER
X			ln -s cua/$i cuf$DEVNUMBER
X		fi
X	done
X	exit 0
fi
X
if test ! -f /proc/tty/drivers
then
X	echo "\
Unable to check driver status.
Make sure proc file system is mounted."
X
X	exit 255
fi
X
if test ! -f /proc/tty/driver/ip2
then
X	echo "\
Unable to locate ip2 proc file.
Attempting to load driver"
X
X	if /sbin/insmod ip2
X	then
X		if test ! -f /proc/tty/driver/ip2
X		then
X			echo "\
Unable to locate ip2 proc file after loading driver.
Driver initialization failure or driver version error.
"
X		exit 255
X		fi
X	else
X		echo "Unable to load ip2 driver."
X		exit 255
X	fi
fi
X
# Ok...  So we got the driver loaded and we can locate the procfs files.
# Next we need our major numbers.
X
TTYMAJOR=`sed -e '/^ip2/!d' -e '/\/dev\/tt/!d' -e 's/.*tt[^ 	]*[ 	]*\([0-9]*\)[ 	]*.*/\1/' < /proc/tty/drivers`
CUAMAJOR=`sed -e '/^ip2/!d' -e '/\/dev\/cu/!d' -e 's/.*cu[^ 	]*[ 	]*\([0-9]*\)[ 	]*.*/\1/' < /proc/tty/drivers`
BRDMAJOR=`sed -e '/^Driver: /!d' -e 's/.*IMajor=\([0-9]*\)[ 	]*.*/\1/' < /proc/tty/driver/ip2`
X
echo "\
TTYMAJOR = $TTYMAJOR
CUAMAJOR = $CUAMAJOR
BRDMAJOR = $BRDMAJOR
"
X
# Ok...  Now we should know our major numbers, if appropriate...
# Now we need our boards and start the device loops.
X
grep '^Board [0-9]:' /proc/tty/driver/ip2 | while read token number type alltherest
do
X	# The test for blank "type" will catch the stats lead-in lines
X	# if they exist in the file
X	if test "$type" = "vacant" -o "$type" = "Vacant" -o "$type" = ""
X	then
X		continue
X	fi
X
X	BOARDNO=`expr "$number" : '\([0-9]\):'`
X	PORTS=`expr "$alltherest" : '.*ports=\([0-9]*\)' | tr ',' ' '`
X	MINORS=`expr "$alltherest" : '.*minors=\([0-9,]*\)' | tr ',' ' '`
X
X	if test "$BOARDNO" = "" -o "$PORTS" = ""
X	then
#	This may be a bug.  We should at least get this much information
X		echo "Unable to process board line"
X		continue
X	fi
X
X	if test "$MINORS" = ""
X	then
#	Silently skip this one.  This board seems to have no boxes
X		continue
X	fi
X
X	echo "board $BOARDNO: $type ports = $PORTS; port numbers = $MINORS"
X
X	if test "$BRDMAJOR" != ""
X	then
X		BRDMINOR=`expr $BOARDNO \* 4`
X		STSMINOR=`expr $BRDMINOR + 1`
X		if test ! -c /dev/ip2ipl$BOARDNO ; then
X			mknod /dev/ip2ipl$BOARDNO c $BRDMAJOR $BRDMINOR
X		fi
X		if test ! -c /dev/ip2stat$BOARDNO ; then
X			mknod /dev/ip2stat$BOARDNO c $BRDMAJOR $STSMINOR
X		fi
X	fi
X
X	if test "$TTYMAJOR" != ""
X	then
X		PORTNO=$BOARDBASE
X
X		for PORTNO in $MINORS
X		do
X			if test ! -c /dev/ttyF$PORTNO ; then
X				# We got the harware but no device - make it
X				mknod /dev/ttyF$PORTNO c $TTYMAJOR $PORTNO
X			fi	
X		done
X	fi
X
X	if test "$CUAMAJOR" != ""
X	then
X		PORTNO=$BOARDBASE
X
X		for PORTNO in $MINORS
X		do
X			if test ! -c /dev/cuf$PORTNO ; then
X				# We got the harware but no device - make it
X				mknod /dev/cuf$PORTNO c $CUAMAJOR $PORTNO
X			fi	
X		done
X	fi
done
X
Xexit 0
SHAR_EOF
  (set 20 01 10 29 10 32 01 'ip2mkdev'; eval "$shar_touch") &&
  chmod 0755 'ip2mkdev' ||
  $echo 'restore of' 'ip2mkdev' 'failed'
  if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \
  && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then
    md5sum -c << SHAR_EOF >/dev/null 2>&1 \
    || $echo 'ip2mkdev:' 'MD5 check failed'
cb5717134509f38bad9fde6b1f79b4a4  ip2mkdev
SHAR_EOF
  else
    shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'ip2mkdev'`"
    test 4251 -eq "$shar_count" ||
    $echo 'ip2mkdev:' 'original size' '4251,' 'current size' "$shar_count!"
  fi
fi
rm -fr _sh17581
exit 0