#! /bin/sh

# author: Frank Rowand  frank.rowand@sonymobile.com
# license: GPL V2

#_______________________________________________________________________________

script=`basename $0`
help=0


cmd_d=0
cmd_n=0
cmd_nb=0
cmd_nd=0
cmd_nxb=0
cmd_nxd=0


while [[ $# -gt 0 ]] ; do

	case $1 in

		-h | -help | --help )
			help=1
			shift $#
			;;

		--d )
			cmd_d=1
			shift
			;;

		--n )
			cmd_n=1
			shift
			;;

		--nb )
			cmd_nb=1
			shift
			;;

		--nd )
			cmd_nd=1
			shift
			;;

		--nxb)
			cmd_nxb=1
			shift
			;;

		--nxd )
			cmd_nxd=1
			shift
			;;

		* )
			break
			;;
	esac

done

if [ $# -gt 0 ] ; then
	help=1
fi


#_______________________________________________________________________________

PDT="/proc/device-tree/"


#_______________________________________________________________________________

if [[ ${help} -eq 1 ]] ; then

echo ""                                                                      >&2
echo "usage:"                                                                >&2
echo "   ${script}"                                                          >&2
echo ""                                                                      >&2
echo "      -h         synonym for --help"                                   >&2
echo "      -help      synonym for --help"                                   >&2
echo "      --help     print this message and exit"                          >&2
echo ""                                                                      >&2
echo "      --d        report devices"                                       >&2
echo "      --n        report nodes"                                         >&2
echo "      --nb       report nodes bound to a driver"                       >&2
echo "      --nd       report nodes with a device"                           >&2
echo "      --nxb      report nodes not bound to a driver"                   >&2
echo "      --nxd      report nodes without a device"                        >&2
echo ""                                                                      >&2
echo "   Reports about nodes in ${PDT}"                                      >&2
echo "   Nodes without a compatible string are not reported"                 >&2
echo ""                                                                      >&2
echo "   data fields reported:"                                              >&2
echo "      --d        Device Node"                                          >&2
echo "      --n        Node Compatible"                                      >&2
echo "      --nb       Node Compatible"                                      >&2
echo "      --nd       Node Compatible Device Driver"                        >&2
echo "      --nxb      Node Compatible"                                      >&2
echo "      --nxd      Node Compatible"                                      >&2
echo ""                                                                      >&2

exit 1

fi


#_______________________________________________________________________________


if [[ ! -d /sys/devices ]] ; then

echo ""                                                                      >&2
echo "ERROR: /sys/devices is not a directory"                                >&2
echo ""                                                                      >&2

exit 1

fi


if [[ ! -d ${PDT} ]] ; then

echo ""                                                                      >&2
echo "ERROR: ${PDT} is not a directory"                                      >&2
echo ""                                                                      >&2

exit 1

fi


# ==============================================================================
# COLLECT DATA

#-----  nodes of devices with an OF_FULLNAME in uevent

nodes_dev=$(
	for dev in `find /sys/devices -name uevent`; do
		grep '^OF_FULLNAME=' ${dev} | sed -e 's|OF_FULLNAME=||'
	done | sort
	)


#-----  nodes with a device that has been bound to a driver

nodes_dev_bound=$(
	for uevent in `find /sys/devices -name uevent`; do
		if [[ -d $(dirname ${uevent})/driver ]]; then
			grep '^OF_FULLNAME=' ${uevent} | sed -e 's|OF_FULLNAME=||'
		fi
	done | sort
	)


#-----  nodes with a compatible property

nodes_compatible=$( \
	for node in `find ${PDT} -name compatible`; do
		echo $(dirname ${node}) | sed -e 's|\/proc\/device-tree||'
	done | sort
	)


# ==============================================================================
# REPORTS

#-----  devices with an OF_FULLNAME in uevent

if [[ ${cmd_d} -eq 1 ]] ; then
	for dev in `find /sys/devices -name uevent`; do
		if grep -q '^OF_FULLNAME' ${dev} ; then
			node=$(grep '^OF_FULLNAME' ${dev} | sed -e 's|OF_FULLNAME=||')
			echo $(dirname ${dev}) ${node}
		fi
	done | sort
fi


#-----  nodes with a compatible property

if [[ ${cmd_n} -eq 1 ]] ; then
	for node in ${nodes_compatible} ; do
		echo ${node} $(cat ${PDT}/${node}/compatible)
	done
fi


#-----  nodes with device bound to driver

if [[ ${cmd_nb} -eq 1 ]] ; then
	for node in ${nodes_dev_bound} ; do
		echo ${node} $(cat ${PDT}/${node}/compatible)
	done
fi


#-----  nodes with a device

if [[ ${cmd_nd} -eq 1 ]] ; then
	for uevent in `find /sys/devices -name uevent`; do
		if [[ -d $(dirname ${uevent})/driver ]]; then
			node=$(  grep '^OF_FULLNAME=' ${uevent} | sed -e 's|OF_FULLNAME=||')
			if [[ "${node}" != "" ]] ; then
				dev=$(dirname ${uevent})
				# driver might be empty
				driver=$(grep '^DRIVER=' ${uevent} | sed -e 's|DRIVER=||' )
				compatible=$(cat ${PDT}/${node}/compatible)
				echo ${node} ${compatible} ${dev} ${driver}
			fi
		fi
	done | sort
fi


#-----  nodes not bound to a driver

if [[ ${cmd_nxb} -eq 1 ]] ; then
	for node in ${nodes_compatible}; do
		if ! echo ${nodes_dev_bound} | grep -E -q "(^| )${node}( |\$)"; then
			echo ${node} $(cat ${PDT}/${node}/compatible)
		fi
	done
fi


#-----  nodes without a device

if [[ ${cmd_nxd} -eq 1 ]] ; then
	for node in ${nodes_compatible}; do
		if ! echo ${nodes_dev} | grep -E -q "(^| )${node}( |\$)"; then
			echo ${node} $(cat ${PDT}/${node}/compatible)
		fi
	done
fi


# ==============================================================================
# ______________________________________________________________________________
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# ______________________________________________________________________________
#  vi config follows:
#
#  add "set modelines" to ~/.exrc or ~/.vimrc to set tabs automatically
#  ex:set tabstop=3 shiftwidth=3 sts=3: