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Diffstat (limited to 'packages/foonas-init/files/reflash')
| -rw-r--r-- | packages/foonas-init/files/reflash | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/packages/foonas-init/files/reflash b/packages/foonas-init/files/reflash new file mode 100644 index 0000000000..f2947822f6 --- /dev/null +++ b/packages/foonas-init/files/reflash @@ -0,0 +1,163 @@ +#!/bin/sh +# +# Open Protium Reflash. This script will take a firmware image consisting +# of a compressed linux kernel image, concatentated with a jffs2 root +# filesystem image. The kernel MTD device is discovered by locating +# the MTD partition with the tag "kernel" and the filesystem MTD device +# is dicovered by locating the MTD partition with the tag "filesystem." +# There is no TOC inside the firmware images so there is no direct way +# to validate that the sizes of the parts in the firmware match the +# existing MTD partitions. So there could be a mismatch. However, a +# a mismatch size will be detect as this script mounts the newly laid +# done filesystem, a mismatch guarantees this to fail. That being said +# the script does validate the total size to prevent overwriting +# uboot. Furthermore the script makes sure the fsdev is not in use and +# that the various images are block aligned. + +flimg=$1 +if [ -z "$flimg" ]; then + echo "Usage: reflash <image file>" + exit 1 +fi + +if [ \! -f $flimg -o \! -r $flimg ]; then + # + # not a file or not readable + # + echo "error: Image file [$flimg] not available" + exit 1 +fi + +dmesg | grep StorCenter >/dev/null 2>&1 +if [ $? -ne 0 ]; then + exit 0 +fi + +blksize=512 +mtd=/proc/mtd +mtab=/proc/mounts +mntdir=/tmp/fs.$$ + +ktag=kernel +fstag=filesystem + +kdev=` grep $ktag $mtd | awk -F: '{print $1}' | sed -e 's?mtd?/dev/mtdblock/?g'` +fsdev=`grep $fstag $mtd | awk -F: '{print $1}' | sed -e 's?mtd?/dev/mtdblock/?g'` + +flsize=`ls -l $flimg | awk '{print $5}'` +ksize=`grep $ktag $mtd | awk '{print "0x" $2}'` +fssize=`grep $fstag $mtd | awk '{print "0x" $2}'` + +# +# Size comes out of dc in exp notation and test wont accept a hex number +# so dumo it in hex then use awk to convert to decimal +# +size=0x`dc 16 o $ksize $fssize + p` +size=`echo $size | awk '{printf ("%d",$1)}'` + +# +# Make sure we are block aligned +# +kblks=`dc $ksize $blksize / p` +r=`dc $ksize $blksize % p` +if [ $r -ne 0 ]; then + echo "error: Kernel partition is not block aligned." + exit 1 +fi + +# +# Make sure we are block aligned +# +fsblks=`dc $fssize $blksize / p` +r=`dc $fssize $blksize % p` +if [ $r -ne 0 ]; then + echo "error: Filesystem partition is not block aligned." + exit 1 +fi + +# +# Check to see that we have enough room +# +if [ $flsize -gt $size ]; then + echo "error: Image size is bigger then available space." + exit 1 +fi + +# +# Is fsdev mounted? +# +grep $fsdev $mtab > /dev/null 2>&1 +if [ $? -eq 0 ]; then + echo "error: $fsdev mounted" + exit 1 +fi + +# +# If root is a jffs2 then close enough, im out +# +grep jffs2 $mtab > /dev/null 2>&1 +if [ $? -eq 0 ]; then + echo "error: $fsdev may be mounted" + exit 1 +fi + + +# +# Mount fsdev and save fsdev/linuxrc +# +mkdir $mntdir /tmp/$$ +mount -t jffs2 $fsdev $mntdir +if [ $? -ne 0 ]; then + echo "error: Unable to mount $fsdev" + exit 1 +fi +echo "Preserving /linuxrc in /tmp/$$" +cp $mntdir/linuxrc* /tmp/$$ +umount $mntdir + +echo "Image:" +echo " Name : $flimg" +echo " Length: $flsize" +echo +echo "Kernel:" +echo " Device: $kdev" +echo " Length: $ksize" +echo " Blocks: $kblks" +echo +echo "Filesystem:" +echo " Device: $fsdev" +echo " Length: $fssize" +echo " Blocks: $fsblks" +echo +echo 'Ready to flash, Continue? (yes/no)' +read continue +if [ "z$continue" != "zyes" ]; then + rm -rf $mntdir /tmp/$$ + exit 0 +fi + +# +# Lets do the flash +# +echo Preserving existing flash in: $flimg.sav.$$ +dd of=$flimg.sav.$$ if=$kdev bs=$blksize count=$kblks +dd of=$flimg.sav.$$ if=$fsdev bs=$blksize count=$fsblks seek=$kblks + +echo Flashing new firmware.... +dd if=$flimg of=$kdev bs=$blksize count=$kblks +dd if=$flimg of=$fsdev bs=$blksize count=$fsblks skip=$kblks +sync +sleep 5 + +# +# Mount fsdev and restore fsdev/linuxrc +# +mount -t jffs2 $fsdev $mntdir +if [ $? -ne 0 ]; then + echo "error: Unable to re-mount $fsdev" + exit 1 +fi +echo "Restoring /linuxrc" +cp /tmp/$$/linuxrc* $mntdir +umount $mntdir +rm -rf $mntdir /tmp/$$ |