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#!/bin/sh
#
# YAFFS: Yet another FFS. A NAND-flash specific file system.
#
# Copyright (C) 2002-2010 Aleph One Ltd.
#
# Created by Charles Manning <charles@aleph1.co.uk>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# Patch YAFFS into the kernel
#
# args: l/c : link or copy
# kpath : Full path to kernel sources to be patched
#
# Somewhat "inspired by" the mtd patchin script
#
VERSION=0
PATCHLEVEL=0
SUBLEVEL=0
COPYORLINK=$1
MULTIORSINGLE=$2
LINUXDIR=$3
# To be a Linux directory, it must have a Makefile
# Display usage of this script
usage () {
echo "usage: $0 c/l m/s kernelpath"
echo " if c/l is c, then copy. If l then link"
echo " if m/s is m, then use multi version code. If s then use single version code"
exit 1
}
if [ -z $LINUXDIR ]
then
usage;
fi
if [ $COPYORLINK = l ]; then
CPY="ln -s"
elif [ $COPYORLINK = c ]; then
CPY="cp"
else
echo "unknown copy or link type"
usage;
fi
if [ $MULTIORSINGLE = m ]; then
VFS_CODE="yaffs_vfs_multi.c"
MTD1_CODE="yaffs_mtdif1_multi.c"
MTD2_CODE="yaffs_mtdif2_multi.c"
YPORTENV="yportenv_multi.h"
KCONFIG_SRC="Kconfig_multi"
elif [ $MULTIORSINGLE = s ]; then
VFS_CODE="yaffs_vfs_single.c"
MTD1_CODE="yaffs_mtdif1_single.c"
MTD2_CODE="yaffs_mtdif2_single.c"
YPORTENV="yportenv_single.h"
KCONFIG_SRC="Kconfig_single"
echo ""
echo "*** Warning ***"
echo "You have chosen to use the single kernel variant of the yaffs VFS glue code"
echo "that only works with the latest Linux kernel tree. If you are using an older"
echo "version of Linux then you probably wanted to use the multi-version variant by"
echo "re-running the patch-ker.sh script using m as a the second argument."
echo " ie $0 $COPYORLINK m $LINUXDIR"
echo ""
else
echo "unknown multi/single version selection"
usage;
fi
# Check if kerneldir contains a Makefile
if [ ! -f $LINUXDIR/Makefile ]
then
echo "Directory $LINUXDIR does not exist or is not a kernel source directory";
exit 1;
fi
# Get kernel version
VERSION=`grep -s VERSION <$LINUXDIR/Makefile | head -n 1 | sed s/'VERSION = '//`
PATCHLEVEL=`grep -s PATCHLEVEL <$LINUXDIR/Makefile | head -n 1 | sed s/'PATCHLEVEL = '//`
SUBLEVEL=`grep -s SUBLEVEL <$LINUXDIR/Makefile | head -n 1 | sed s/'SUBLEVEL = '//`
# Can we handle this version?
if [ $VERSION$PATCHLEVEL -lt 26 ]
then
echo "Cannot patch kernel version $VERSION.$PATCHLEVEL.$SUBLEVEL, must be 2.6.x or higher"
exit 1;
fi
KCONFIG=$LINUXDIR/fs/Kconfig
KCONFIGOLD=$LINUXDIR/fs/Kconfig.pre.yaffs
YAFFS_PATCHED_STRING=`grep -s yaffs <$KCONFIG | head -n 1`
MAKEFILE=$LINUXDIR/fs/Makefile
MAKEFILEOLD=$LINUXDIR/fs/Makefile.pre.yaffs
if [ ! -z "$YAFFS_PATCHED_STRING" ]
then
YAFFS_PATCHED=0
echo "$KCONFIG already mentions YAFFS, so we will not change it"
else
# Change the fs/Kconfig file
# Save the old Kconfig
# Copy all stuff up to JFFS
# Insert some YAFFS stuff
# Copy all the rest of the stuff
YAFFS_PATCHED=1
echo "Updating $KCONFIG"
mv -f $KCONFIG $KCONFIGOLD
sed -n -e "/[Jj][Ff][Ff][Ss]/,99999 ! p" $KCONFIGOLD >$KCONFIG
# echo "">>$KCONFIG
# echo "# Patched by YAFFS" >>$KCONFIG
echo "source \"fs/yaffs2/Kconfig\"">>$KCONFIG
# echo "">>$KCONFIG
sed -n -e "/[Jj][Ff][Ff][Ss]/,99999 p" $KCONFIGOLD >>$KCONFIG
# now do fs/Makefile -- simply add the target at the end
echo "Updating $MAKEFILE"
cp -f $MAKEFILE $MAKEFILEOLD
# echo "">>$MAKEFILE
# echo "# Patched by YAFFS" >>$MAKEFILE
echo "obj-\$(CONFIG_YAFFS_FS) += yaffs2/" >>$MAKEFILE
fi
YAFFSDIR=$LINUXDIR/fs/yaffs2
if [ -e $YAFFSDIR ]
then
echo "$YAFFSDIR exists, so not patching. If you want to replace what is"
echo "already there then delete $YAFFSDIR and re-run this script"
echo " eg. \"rm -rf $YAFFSDIR\" "
else
rm yaffs*.mod.c 2> /dev/null
mkdir $LINUXDIR/fs/yaffs2
$CPY $PWD/Makefile.kernel $LINUXDIR/fs/yaffs2/Makefile
$CPY $PWD/$KCONFIG_SRC $LINUXDIR/fs/yaffs2/Kconfig
$CPY $PWD/*.c $PWD/*.h $LINUXDIR/fs/yaffs2
rm $LINUXDIR/fs/yaffs2/yaffs_vfs*.c $LINUXDIR/fs/yaffs2/yaffs_mtdif[12]*.c
rm $LINUXDIR/fs/yaffs2/yportenv*.h
rm $LINUXDIR/fs/yaffs2/moduleconfig.h
$CPY $PWD/$VFS_CODE $LINUXDIR/fs/yaffs2/yaffs_vfs.c
$CPY $PWD/$MTD1_CODE $LINUXDIR/fs/yaffs2/yaffs_mtdif1.c
$CPY $PWD/$MTD2_CODE $LINUXDIR/fs/yaffs2/yaffs_mtdif2.c
$CPY $PWD/$YPORTENV $LINUXDIR/fs/yaffs2/yportenv.h
fi
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