#
#		(C) 1989-1990 The Santa Cruz Operation, Inc.  All Rights
#		Reserved.  The user has unlimited right to use, modify
#		and incorporate this code into other products provided
#		it is used with SCO products and the user includes
#		this notice and the associated copyright notices with
#		any such application.
# This script is for installing an LLI driver using netconfig
#
# This script was modifyed to be used for the dce driver on JAN - 93
# by DC-ISV drivers group.
# The name it is called with will cause different operation.
# dce0 dce1 dce2 dce3		== DC21x4 PCI/EISA boards 0 - 3
#
#
# ISV modification history
# ========================
#
# Jan-19-93  General cleanup and transfer for 21040 .   
#                                                      Ilan Hindy.
#
# Jan-30-93  Add /usr/lib/lli to the path so that ha and hc can 
#           be used
#                                                      Ilan Hindy.
# Jan-30-93 Fix a bug in writing system
#
# May-10-94 Add dupport to PCI boards (must be slot number 0 and IRQ 
#           is selected by the PCI BIOS)
#                                                      Rivki Vizen. 
# May-19-94 Fix bug - in error cases (in the init scripts) the remove script 
#           (that was called after the error was detected), decrease the number
#           of buffers in /etc/conf/cf.d/stune even those numbers wasn't
#           increase (because an error was detected). To fix this bug a new 
#           parameter was added to cleanup routine - this parameter indicate 
#           if we should add buffers in /etc/conf/cf.d/stune. 
#                                                      Rivki Vizen. 
# May-31-94 Add support to interrupt sharing.
# May-31-94 Dynamically add interrupt handler in PCI cards.
# Jun-01-94 Dynamically add interrupt handler in EISA cards.
# May-03-95 Add support to Everest (not full support yet): Add another
#           path that the driver can be found : /usr/lib/lli#.
#
LIB=/usr/lib/lli
CONF=/etc/conf
PATH=/bin:/usr/bin:/etc/:$CONF/bin:$LIB:/usr/lib/lli#
#
# Set possible return codes for this script
#
OK=0;	FAIL=1;	RELINK=2;

#
# Prompt the user for a hex value, it must be within a given range
# Usage:
# 	prompt_range "Message" default min max [step]
#
prompt_range() {
	mesg=$1
	default=$2
	range_min=$3 range_max=$4
	step="1"
	if [ $# -eq 5 ]
	then
		step=$5
	fi

	while :
	do
		echo "${mesg} (${range_min}..${range_max}) [${default}] or 'q' to quit: \c"
		read result
		case $result in
		Q|q)
			return $FAIL
			;;
		"")
			result=$default
			;;
		esac
     
		hc $result $range_min $range_max $step
		case $? in
		0) return $OK;;
		1) cleanup $FAIL 1;;
		esac
	done
}

#
# Prompt the user to make a selection a list of values
# Usage:
#	prompt_select "Message" default "value_list"
prompt_select() {
	mesg=$1
	default=$2
	values=$3

	while :
	do
		echo "${mesg} (${values}) [${default}] or 'q' to quit: \c"
		read result
		case $result in
		Q|q)
			return $FAIL
			;;
		"")
			result=$default
			;;
		esac

		for i in $values
		do
			if [ "$i" = "$result" ]
			then
				return $OK
			fi
		done
		echo "Illegal value, must be one of (${values})"
	done
}

#
# prompt the user to answer a yes no question or 'q' to quit
# Usage:
#	prompt_yn "Message" default
prompt_yn() {
	mesg=$1
	default=$2

	while :
	do
		echo "${mesg} (y/n) [${default}] or 'q' to quit: \c"
		read result

		case $result in
		q|Q) return $FAIL;;
		y|Y) result="Y"; return $OK;;
		n|N) result="N"; return $OK;;
		"") result=`echo $default | tr "yn" "YN"`; return $OK;;
		esac

		echo "Illegal value, please type 'y' 'n' or 'q'"
	done
}

#
# Fake up an mdevice and an sdevice for idcheck
#
makedevs() {
	dir=`pwd`
	rm -fr /tmp/dev$$
	mkdir /tmp/dev$$
	cd /etc/conf/cf.d
	cp mdevice /tmp/dev$$
	cd ../sdevice.d
	cat * > /tmp/dev$$/sdevice
	cd $dir
}

cleanup() {
	cd /
	rm -fr /tmp/dev$$
	rm -fr /tmp/$base
    if [ $2 -eq 1 ]
    then

    	currdir=`pwd`

	    cd /etc/conf/cf.d
	
	    echo "Modifying Streams Data Configuration Parameters"

	    sparam=0
	    sparam=`./configure -y NBLK2048`
            echo -n Value of NBLK2048 changed from $sparam t
	    sparam=`expr $sparam + 10`
            echo o $sparam 
    	idtune -f NBLK2048 $sparam
	    
    	sparam=0
	    sparam=`./configure -y NBLK64`
            echo -n Value of NBLK64 changed from $sparam t
	    sparam=`expr $sparam + 10`
            echo o $sparam
    	idtune -f NBLK64 $sparam

            cd $currdir
    fi

	exit $1
}

# Removes the given interrupt vector for the $clash device.
rmvector() {
	clash=$1
	vec=$2

	cd $confdir
	echo "\nRemoving interrupt vector $vec for the $clash device ..."

	[ "$vec" = "2" ] && vec=9
	major=`./configure -j $clash` && { 
		# remove device but leave it required
		./configure -d -c -m $major -v $vec -Y >> conflog 2>&1 || { 
			cd $currdir
			cleanup $FAIL 1
		}
		# remove required setting if no more left
		if grep "Y" ../sdevice.d/$clash > /dev/null 2>&1
		then
			true
		else
			./configure -d -c -m $major -v $vec -R -Y >> conflog 2>&1 || { 
				cd $currdir
				cleanup $FAIL 1
			}
		fi
    	}
	cd $currdir
	return $OK
}

# On unix, we must check the files in sdevice.d.
# Sets the variable $clash to the driver code name if there is a driver that
# has already been allocated the given vector. Uses awk.
dointclash() {
	driver=$1
	vec=$2

	[ "$vec" = "2" ] && vec=9
	cd $confdir/../sdevice.d
	clash=`cat * | awk '{ if ( $6 == intr && $2 == "Y" ) exit } \
			END { print $1 }' intr=$vec`

	cd $currdir

	[ "$clash" = "" -o "$clash" = "$driver" ] && return $FAIL
	# found a clash
	return $OK
}

checkvec() {
	driver=$1
	vector=$2
	clash=
        
	currdir=`pwd`
	confdir=/etc/conf/cf.d

	while dointclash $driver $vector
	do
		prompt_select "Interrupt vector $vector is already in use for the $clash device.\n\n\
The alternatives available to you are:\n\n\
\t1. Continue the installation and remove vector $vector for the $clash device.\n\
\t2. Select a different interrupt vector.\n\n\
Select an option" 1 "1 2" || { 
			cleanup $FAIL 1
		}
		case $result in
		1)	rmvector $clash $vector || { 
				echo "Failed to remove vector $vector"
				cleanup $FAIL 1
			}
			makedevs
			return $OK
			;;
		2)	return $FAIL
			;;
		esac
	done
	return $OK
}

doaddrclash() {
	driver=$1
	addr1=$2
	addr2=$3

	cd $confdir
	clash=`../bin/idcheck -ar -l $addr1 -u $addr2 -i /tmp/dev$$`
	cd $currdir

	[ "$clash" = "" -o "$clash" = "$driver" ] && return $FAIL
	# found a clash
	return $OK
}

checkaddr() {
	driver=$1
	addr1=$2
	addr2=$3
	clash=

	currdir=`pwd`
	confdir=/etc/conf/cf.d

	while doaddrclash $driver $addr1 $addr2
	do
		prompt_yn "
Addresses $addr1-$addr2 are already in use by the $clash device.
You must choose a unique address for this device to work. 
Do you wish to choose another address now?" y || cleanup $FAIL 1
		if [ "$result" = "Y" ]
		then
			return $FAIL
		else	
			cleanup $FAIL 1
		fi
	done
	return $OK
}


#
# check_args ()
# 
# Check the name and board number.
# The name have to be dce and the board number between 0..3
# 
# This function defines the variables :
#  bd
#  name
#  PREFIX
#  MAX_BD
# 
# which are used as global variables in main() 

check_args() {
	name=$1
	bd=$2

	case $name in
	dce) echo "Configuring DC21x4  PCI/EISA board $bd";
		PREFIX="DCE";
		MAX_BD=3;
		;;
	*) echo "ERROR: Unknown LLI driver being configured ($name$bd)";
		cleanup $FAIL 1;
		;;
	esac

	if [ $bd -gt $MAX_BD ]
	then
		echo "ERROR: Only boards 0..$MAX_BD are supported by this driver";
		cleanup $FAIL 1
	fi
	echo
}

#
# system_dce()
#
# function to produce the info for the System file for the DC21x4
# boards
#
# The info produced :
# 
# The interrupt level - from the user
# The slot number (and IO space used by the board ) - from the user
# The buffers consumed by the driver.
# 
system_dce() {
	bd=$1

	prompt_select "Enter board type (EISA/PCI)" "p" "e p" || cleanup $FAIL 1
    if [ "$result" = "p" ]
    then
    	BIO=0
        EIO=0
    	IRQ=0
    else
    	while :
	    do
		    prompt_range "Enter slot number" "4" "1" "f" "1" || cleanup $FAIL 1
    		bio=${result}000
	    	EIO=`expr $bio + 800`
		    checkaddr $name$bd $bio $EIO && break
	    done
    	BIO=$bio
    	IRQ=0
    fi


	currdir=`pwd`

	cd /etc/conf/cf.d
	
	echo "Modifying Streams Data Configuration Parameters"

	sparam=0
	sparam=`./configure -y NBLK2048`
        echo -n Value of NBLK2048 changed from $sparam t
	sparam=`expr $sparam + 10`
        echo o $sparam 
	idtune -f NBLK2048 $sparam
	
	sparam=0
	sparam=`./configure -y NBLK64`
        echo -n Value of NBLK64 changed from $sparam t
	sparam=`expr $sparam + 10`
        echo o $sparam
	idtune -f NBLK64 $sparam

        cd $currdir
 
	NMINORS="1"
}


# main()
#

#
# get the name of the init script being run, since one script
# is used for multiple drivers; get the number at the end of the
# script's name
#
if [ $# -gt 1 ]
then
	name_below=$1; if_below=$2
	name_above=$3; if_above=$4
	configure=$5
fi

base=`basename $0`
drv=`echo $base | sed -e 's/[0-9]*$//`
bd=`expr $base : '.*\(.\)'`
chains=/usr/lib/lli/chains
chain=$base:$name_above

makedevs
check_args $drv $bd

#
# Check and manage our internal chains file.
# This file allows coexistent mkdev and netconfig calls.
#
# chain already installed
grep $chain $chains > /dev/null 2>& 1 && {
	cleanup $OK 0
}
# this board already installed
grep $base: $chains > /dev/null 2>& 1 && {
	echo $base already configured.
	echo $chain >> $chains
	cleanup $OK 0
}
#
# Now check that if we are not board zero that board zero is installed
#
[ "$bd" -ne "0" ] && {
	grep ${drv}0 $chains > /dev/null 2>& 1 || {
		echo "${drv}0 not configured, you must configure it first"
		cleanup $FAIL 1
	}
}

#
# check to see if the driver is already in the kernel link-kit so we can
# either add it or update it later on
#
idcheck -p $base -i /tmp/dev$$
if [ $? -gt 16 ]
then
	installed="TRUE"
else
	installed="FALSE"
fi

if [ "$bd" = "0" ]
then
	echo "Installing the $drv driver into the link kit"
	cd /usr/lib/lli/$drv
	if [ "$installed" = "TRUE" ]
	then
		idinstall -u -e -k $base
	else
		idinstall -a -e -k $base
	fi
	makedevs
else
	idcheck -p ${drv}0 -i /tmp/dev$$
	if [ $? -le 16 ]
	then
		echo "${drv}0 must be configured before attempting to configure $drv"
		cleanup 1 1
	fi
fi

#
# create the temporary directory for installing the driver
#
cd /tmp; rm -rf $base
mkdir $base; cd $base

#
# Do special board dependent processing
#
case $drv in
	dce)	system_dce $bd;;
esac
echo
if [ "$IRQ" = "2" ]
then
	IRQ=9
fi

echo "$base\tY\t$NMINORS\t0\t0\t$IRQ\t$BIO\t$EIO\t0\t0" >./System

#
# All the drivers support more than one board.  In fact all the code to
# support all the boards is in the Driver.o for the board for the 1st board
# (eg the e3A0 driver acually contains enough code for the e3A1, e3A2 & e3A3
# boards).  As we need a Driver.o to be associated with 2nd, 3rd or 4th board
# we install a dummy Driver.o, and a Master and Node which will actually cause
# calls into the base driver.
#
if [ $bd -gt 0 ]
then

	echo "$base    p      iScH    $PREFIX$bd       0       0       1           256	-1" >./Master
	echo "clone	$base	c	$base" >./Node

	if [ "$installed" = "TRUE" ]
	then
		idinstall -u -m -s -n -e -k $base
	else
        if [ -f $LIB/Driver.o ] 
        then
    		cp $LIB/Driver.o .
        else
    		cp /usr/lib/lli#/Driver.o .
	    fi
	    idinstall -a -e -k $base
	fi
else
	idinstall -u -s -e -k $base
fi
# we successfully installed this driver, add it to the chains file
echo $chain >> $chains

echo "NODE=/etc/conf/node.d/$base" >/tmp/$base.src
chmod 777 /tmp/$base.src

cleanup $RELINK 0
