memory

pcmcia source code

#!/bin/sh
#
# memory 1.28 2000/12/15 19:04:03 (David Hinds)
#
# Initialize or shutdown a PCMCIA memory device
#
# The first argument should be either 'start' or 'stop'.  The second
# argument is the base name for the device.
#
# This script creates character devices for direct access to the PCMCIA
# address spaces:
#
#	/dev/{name}c	- common memory direct access device
#	/dev/{name}a	- attribute memory direct access device
#
# It also creates character and block devices for accessing the first
# attribute and common memory partitions:
#
#       /dev/{name}c0c  - common memory, character device
#       /dev/{name}c0b  - common memory, block device
#       /dev/{name}a0c  - attribute memory, character device
#
# The script passes an extended device address to 'memory.opts' in the 
# ADDRESS variable, to retrieve device-specific configuration options
# for the common-memory block device.
#
# The address format is "scheme,socket" where "scheme" is the current
# PCMCIA device configuration scheme, and "socket" is the socket number.
#

if [ -r ./shared ] ; then . ./shared ; else . /etc/pcmcia/shared ; fi

# Get device attributes
get_info $DEVICE

# Load site-specific settings
ADDRESS="$SCHEME,$SOCKET"
. $0.opts

case "$ACTION" in

'start')
    [ "$VERBOSE" -a "$INFO" ] && echo "$INFO"
    rm -f /dev/${DEVICE}*
    if [ "$DRIVER" = "memory_cb" ] ; then
	for N in 0 1 2 3 4 5 6 7 ; do
	    log mknod /dev/${DEVICE}s${N} c $MAJOR `expr $MINOR + $N`
	done
    else
	log mknod /dev/${DEVICE}c0c c $MAJOR `expr $MINOR`
	log mknod /dev/${DEVICE}c0b b $MAJOR `expr $MINOR`
	log mknod /dev/${DEVICE}a0c c $MAJOR `expr $MINOR + 4`
	log mknod /dev/${DEVICE}c c $MAJOR `expr $MINOR + 8`
	log mknod /dev/${DEVICE}a c $MAJOR `expr $MINOR + 8 + 4`
	add_blkdev /dev/${DEVICE}c0b || exit 1
    fi
    ;;

'check')
    is_true $NO_CHECK && exit 0
    do_fuser -s /dev/${DEVICE}* && exit 1
    if [ "$DRIVER" != "memory_cb" ] ; then
	do_fuser -s -m /dev/${DEVICE}c0b && exit 1
    fi
    ;;

'stop')
    do_fuser -k /dev/${DEVICE}* > /dev/null
    if [ "$DRIVER" != "memory_cb" ] ; then
	rm_blkdev /dev/${DEVICE}c0b || exit 1
    fi
    rm -f /dev/${DEVICE}*
    ;;

'cksum')
    chk_simple "$NEW_SCHEME,$SOCKET,$INSTANCE" || exit 1
    ;;
    
'suspend'|'resume')
    ;;

*)
    usage
    ;;

esac

exit 0