:
#		(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
# emA -- Cogent eMASTER+ MCA (EM845) Adapter Driver
#
# Netconfig reconf script V.1.00
#	
#		Copyright (c) 1993 Cogent Data Technologies, Inc
#		All Rights Reserved
#
LIB=/usr/lib/lli
CONF=/etc/conf
PATH=/bin:/usr/bin:/etc/:$CONF/bin:$LIB
#
# Set possible return codes for this script
#
OK=0;	FAIL=1;	RELINK=2;

BRAM="0"
ERAM="0"

#
# 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;;
		2) cleanup $FAIL;;
		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
		if [ "$default" = "" ]
		then
			echo "${mesg} (${values}) or 'q' to quit: \c"
		else
			echo "${mesg} (${values}) [${default}] or 'q' to quit: \c"
		fi
		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
# Do not remove $base if called with an argument...
#
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
	[ $1 ] && {
		# remove driver being reconfigured from sdevice & mdevice files.
		sed -e "/^$base/d" < /tmp/dev$$/sdevice > /tmp/bog$$
		mv /tmp/bog$$ /tmp/dev$$/sdevice 
		sed -e "/^$base/d" < /tmp/dev$$/mdevice > /tmp/bog$$
		mv /tmp/bog$$ /tmp/dev$$/mdevice 
	}
	cd $dir
}

cleanup() {
	cd /
	rm -fr /tmp/dev$$
	rm -fr /tmp/$base
	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 $FAIL
		}
		# remove required setting if no more left
		if grep "Y" ../sdevice.d/$clash > /dev/null 2>&1
		then
			true
		else
			./configure -d -c -m $major -v $vec -R -Y >> conflog 2>&1 || { 
				cd $currdir
				cleanup $FAIL
			}
		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
		}
		case $result in
		1)	rmvector $clash $vector || { 
				echo "Failed to remove vector $vector"
				cleanup $FAIL
			}
			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
}

# Removes the $clash device.
rmaddr() {
	clash=$1

	cd $confdir
	echo "\nRemoving the $clash device ..."

	major=`./configure -j $clash` && { 
		# remove device but leave it required
		if [ "$major" != "0" ] 
		then
			./configure -d -c -m $major -Y >> conflog 2>&1 || { 
				cd $currdir
				cleanup $FAIL
			}
		else
			sed -e "s/Y/N/" ../sdevice.d/$clash > /tmp/bog$$
			mv /tmp/bog$$ ../sdevice.d/$clash 
		fi
		# remove required setting if no more left
		if grep "Y" ../sdevice.d/$clash > /dev/null 2>&1
		then
			true
		elif [ "$major" != "0" ]
		then
			./configure -d -c -m $major -R -Y >> conflog 2>&1 || { 
				cd $currdir
				cleanup $FAIL
			}
		fi
    	}
	cd $currdir
	return $OK
}

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

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

	while doaddrclash $driver $addr1 $addr2
	do
		if [ "$clash" = "ad" ]
		then
			echo "\n\nWARNING: Do not remove the $clash device \c"
			echo "if you are using an Adaptec disk controller"
		fi
		prompt_select "Addresses $addr1-$addr2 are already in use by the $clash device.\n\n\
The alternatives available to you are:\n\n\
\t1. Continue the installation and remove the $clash device.\n\
\t2. Select a different address.\n\n\
Select an option" 1 "1 2" || { 
			cleanup $FAIL
		}
		case $result in
		1)	rmaddr $clash || { 
				echo "Failed to remove $clash device"
				cleanup $FAIL
			}
			makedevs
			return $OK
			;;
		2)	return $FAIL
			;;
		esac
	done
	return $OK
}

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

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

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

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

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

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

# On unix, we must check the lines in mdevice file.
# Sets the variable $clash to the driver code name if there is a driver that
# has already been allocated the given channel. Uses awk.
dodmaclash() {
	driver=$1
	chan=$2
 	clash=

	# -1 is never a clash
	[ "$chan" = "-1" ] && return $FAIL

	cd $confdir
	clash=`awk '{ if ( $1 != driver && $9 == dma ) print $1 }' dma=$chan driver=$driver mdevice`

	[ "$clash" = "" ] && {
		cd $currdir
		return $FAIL
	}

	cd ../sdevice.d
	clash=`cat $clash | awk '{ if ( $2 == "Y") exit 1 }  \
		END {print $1} '` || return $OK
	
	if [ "$rel" = "3.2.0" -o "$rel" = "3.2.1" -o "$rel" = "3.2.2" ]
	then
		prompt_yn "
DMA channel ${chan} is already in use by the $clash device.
However, the $clash device is not currently configured into the kernel.
Do you wish to remove DMA channel ${chan} from the $clash device?" y || cleanup $FAIL
		if [ "$result" = "Y" ]
		then
			sed -e "s/Y/N/" $clash > /tmp/bog$$
			mv /tmp/bog$$ $clash 
			cd $currdir
			return $FAIL
		else	
			cd $currdir
			return $FAIL
		fi
	fi

	# Should be release >3.2.2, clash driver not installed if we get here.
	cd $currdir
	return $FAIL
}

#
# Check if there is a clash of DMA channels
#
checkdma() {
	driver=$1
	channel=$2
	clash=

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

	while dodmaclash $driver $channel
	do
		cd $currdir
		prompt_yn "
DMA channel ${channel} is already in use by the $clash device.
You must choose a unique channel for this device to work. 
Do you wish to choose another channel now?" y || cleanup $FAIL
		if [ "$result" = "Y" ]
		then
			return $FAIL
		else	
			cleanup $FAIL
		fi
	done
	return $OK
}

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

	case $name in
	emA) echo "Configuring Cogent eMASTER+ MCA (EM845) board $bd";
		PREFIX="emC";
		MAX_BD=3;
		;;
	*) echo "ERROR: Unknown LLI driver being configured ($name$bd)";
		cleanup $FAIL;
		;;
	esac

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

#
# function to produce the info for the System file for Cogent eMASTER+ MCA  
# (EM845) boards
#
system_emA() {
	bd=$1

	case $bd in
	0) IRQ=10; DMA=-1; BIO=1800;;
	1) IRQ=11; DMA=-1; BIO=5000;;
	2) IRQ=12; DMA=-1; BIO=5800;;
	3) IRQ=9; DMA=-1; BIO=9000;;
	esac

	while :
	do
		prompt_select "Enter IRQ" $IRQ "3 4 5 7 9 10 11 12 14 15" || cleanup $FAIL
		irq=$result
		checkvec $name$bd $irq && break
	done

	while :
	do
		prompt_select "Enter I/O base address" $BIO "0 1800 5000 5800 9000 9800 d000 d800" || cleanup $FAIL
		bio=$result
		if [ "$bio" != "0" ] 
		then
			EIO=`ha $bio ff`
			checkaddr $name$bd $bio $EIO && break
		else
			EIO=0
			break
		fi
	done

	IRQ=$irq
	BIO=$bio
	DMACHAN=$DMA
	NMINORS="1"
}

#
# function to restore and remove address conflicts in the sio driver
#
sio_conflict() {
	if [ "$BIO" = "$OBIO" ]
	then
		return $OK
	fi

	currdir=`pwd`
	cd /etc/conf/pack.d/sio
	grep "/* LLI {.*$OBIO" space.c > /dev/null && {
		echo "Restoring serial cards using base address 0x$OBIO into link kit..."
		sed -e /"LLI.*$OBIO,/s/^\/\* LLI //" space.c >/tmp/bog$$
		mv /tmp/bog$$ space.c 
	}
	grep "(sd)0x$BIO" space.c > /dev/null && {
		echo "Removing serial cards using base address 0x$BIO from link kit..."
		[ ! -f space.c.rls ] && cp space.c space.c.rls
		sed -e /"(sd)0x$BIO,/s/^{/\/* LLI {/p" space.c >/tmp/bog$$
		mv /tmp/bog$$ space.c
	}
	cd $currdir
}

# restorevector check for sio (vecs 3-4) and pa drivers (vec 7)
# if these are being released by lli then let us restore them to sio or pa
restorevector() {
	currdir=`pwd`
	cd /etc/conf/cf.d

	intvector=$1
	test="0"
	[ "$intvector" = "3" -o "$intvector" = "4" ] && {
		prompt_yn "Restore vector $intvector to sio driver" y
		[ "$result" = "Y" ] && {
			echo "Restoring vector $intvector to sio driver"
			siomajor=`./configure -j sio`
			./configure -m $siomajor -c -v $intvector -a -Y
			return $OK
		}
	}
	[ "$intvector" = "7" ] && {
		prompt_yn "Restore vector $intvector to pa driver" y
		[ "$result" = "Y" ] && {
			echo "Restoring vector $intvector to pa driver"
			pamajor=`./configure -j pa`
			./configure -m $pamajor -c -v $intvector -a -Y
			return $OK
		}
	}
	return $OK
}

#
# determine release, and AT or MCA bus - set rel and type variables accordingly.
#
os_type() {
	rel=`sed -n 's/^#rel=\(.*\).$/\1/p' /etc/perms/rts`
	if [ "$rel" = "3.2.0" -o "$rel" = "3.2.1" -o "$rel" = "3.2.2" ]
	then
		type=`sed -n 's/^#typ=\(.*\)$/\1/p' /etc/perms/inst`
	else
		# 3.2.4 - one release supports AT, MCA, and EISA.
		uname -X | grep "BusType = MCA" >/dev/null 2>&1
		if [ $? -eq 0 ]
		then
			type=386MC
		else
			type=386GT
		fi
	fi
}

#

#
# Edits the major number into the space.c file for Racal InterLan drivers
#
space_inn() {

	spacef=${CONF:-/etc/conf}/pack.d/${drv}0/space.c
	currdir=`pwd`
	cd $CONF/cf.d
	maj=`./configure -j $base`
	if [ $? -ne 0 -o "$maj" = "" ]
	then
		maj=`./configure -j NEXTMAJOR`
	fi
	cd $currdir

	if [ "$bd" -eq 0 ]
	then
		str="${ucbase}_MAJEDT"
	else
		str="${ucbase}${bd}_MAJEDT"
	fi
	sed "s/$str/$maj/" $spacef >/tmp/bog$$
	cp /tmp/bog$$ $spacef
	rm -f /tmp/bog$$
}

# 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 : '.*\(.\)'`

makedevs $OK
check_args $drv $bd

#
# verify the driver is in the kernel link-kit
#
idcheck -p $base -i /tmp/dev$$
if [ $? -le 16 ]
then
	echo "Error: $base driver is not installed"
	cleanup $FAIL
fi

echo "Reconfiguring the $drv driver"
cd /usr/lib/lli/$drv
makedevs

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

DMACHAN="-1"

#
# set rel, type variables.
#
os_type

# get the interrupt vector & Base I/O address for the board that we are removing
currdir=`pwd`
cd /etc/conf/sdevice.d
ivec=`awk '{ if ( $1 != "*" ) print $6 }' < $base`
OBIO=`awk '{ if ( $1 != "*" ) print $7 }' < $base`
cd $currdir

#
# Do special board dependent processing
#
system_$drv $bd

echo
if [ "$IRQ" = "2" ]
then
	IRQ=9
fi

echo "$base\tY\t$NMINORS\t5\t1\t$IRQ\t$BIO\t$EIO\t$BRAM\t$ERAM" >./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 emA0 driver acually contains enough code for the emA1, emA2 & emA3
# 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	I	iScH	$PREFIX$bd	0	0	1	256	$DMACHAN" >./Master
	echo "clone	$base	c	$base" >./Node

	idinstall -u -m -s -n -e -k $base
else
	echo "$base	I	iScH	$PREFIX	0	0	1	256	$DMACHAN" >./Master
	idinstall -u -m -s -p -e -k $base
fi

# delete any potential BASE I/O address conflicts with the sio driver
[ "$rel" = "3.2.0" -o "$rel" = "3.2.1" -o "$rel" = "3.2.2" ] && sio_conflict

if [ "$ivec" = "3" -o "$ivec" = "4" -o "$ivec" = "7" ]
then
	[ ${ivec} != ${IRQ} ] && restorevector $ivec
fi

cleanup $RELINK
