#!/bin/bash
## (c) Denis Kaganovich
## v5
## grep-pcre required

#BUS="pci"
BUS="\w+"

STR="^(?:static\s+)?(?:const\s+)?struct\s+"

fnd(){
local msg="Fixing:"
$fix || msg="Need to fix:"
grep -Prhl "${STR}${BUS}_device_id\s+" $1 --include="*.c" | while read i ; do
	local bus=`grep -Prho "${STR}${BUS}_device_id.*\s+" $i`
	bus="${bus#*struct }"
	local n="${bus%%[*}"
	n="${n%%=*}"
	n="${n##*device_id }"
	n="${n// }"
	bus="${bus%%_device_id*}"
	grep -Pq "^module_init\s*\(" $i || continue
	grep -q "MODULE_DEVICE_TABLE" $i && continue
	local ii="${i#$1}"
	ii="${ii#/}"

#	case $ii in
#	*/mdio-gpio.c)
#		echo "BROKEN: $bus: $ii"
#		continue
#	;;
#	esac

	bus="${bus%%_*}"
	local BU
	case "$bus" in
	sdio)BU=MMC;;
	*)BU="${bus^^}";;
	esac
	if grep -Prq "^\s*(?:menu)?config\s+$BU(?:\s.*)?$" $1 --include="Kconfig*"; then
		echo "$msg $BU: ($n) $ii"
		$fix && sed -i -e 's/^\(module_init.*\)$/\n#ifdef CONFIG_'"$BU"'\nMODULE_DEVICE_TABLE('"$bus, $n"');\n#endif\n\n\1/' $i
	else
		echo "$msg $bus: ($n) $ii"
		$fix && sed -i -e 's/^\(module_init.*\)$/\nMODULE_DEVICE_TABLE('"$bus, $n"');\n\n\1/' $i
	fi
done
}

p=""
fix=false
while [[ -n "$*" ]]; do
	case "$1" in
	--fix)fix=true;;
	*)p="$p $1";;
	esac
	shift
done
[[ -z "$p" ]] && echo "$0 [--fix] <path_to_kernel>
(grep+pcre required)" && exit 1

fnd $p