#!/sbin/runscript
# read this article to know what to do
# http://gentoo.org/doc/en/articles/hardware-stability-p2.xml#doc_chap3_pre2

# report bugs to: http://bugs.gentoo.org/show_bug.cgi?id=173347

depend() {
	before bootmisc hdparm
}

do_setpci() {
	if [[ "$1" = "*:*" ]]; then
		GLOB="global "
		SWITCH="-d"
	else
		SPEC="for card $1 "
		SWITCH="-s"
	fi

	SPECID="$1"
	shift

	ebegin "Setting ${GLOB}params ${SPEC}to $@"
	setpci $SETPCI_OPT $SWITCH $SPECID $@
	eend $?
	GLOB=""
	SPEC=""
	SPECID=""
	SWITCH=""
}

do_enum_pciid() {
	# TODO: check if {7} is correct, ie. pci id are always in the form ab:cd.e
	#       or use a more elegant form, e.g. awk '{print $1}'
	lspci | sed -e 's/^\([0-9a-f:.]\{7\}\).*$/\1/'
}

start() {
	if get_bootparam "nopciparm" ; then
		ewarn "Skipping pciparm init as requested in kernel cmdline"
		return 0
	fi

	SETPCI_OPT=""
	if [[ "$VERBOSE" = "yes" ]]; then
		SETPCI_OPT="$SETPCI_OPT -v"
	fi

	if [[ -n "$PCIPARM_ALL" ]]; then
		do_setpci "*:*" $PCIPARM_ALL
	fi

	for pci_id in `do_enum_pciid`; do
		PCIPARM=`echo PCIPARM_${pci_id} | sed -e's/[:.]/_/g'`
		if [[ -n "${!PCIPARM}" ]]; then
			do_setpci ${pci_id} ${!PCIPARM}
		fi
	done
}