qi-add-6410-bootable-sdcard-generator.patch

This patch adds a small script that knows how to partition, format and
prepare with a bootloader image an SD Card for usage with SD Card boot
on 6410.

You use it like this:

./6410-partition-sd.sh sde sdhc ./image/qi-s3c6410-andy_495294c60f2f1432

This will prepare your card with three partitions and put the bootloader
images at the end as required by 6410 iROM.

If you put anything on the fourth parameter, it skips the fdisk and the
formatting stages and just updates the bootloader.

Signed-off-by: Andy Green <andy@openmoko.com>

qiboot/6410-partition-sd.sh

@@ -0,0 +1,125 @@
+#!/bin/sh
+# 6410 SD Boot formatter
+# (C) 2008 Openmoko, Inc
+# Author: Andy Green <andy@openmoko.com>
+
+# LAYOUT
+# Partition table, then
+# VFAT takes up remaining space here
+# then...
+#
+EXT3_ROOTFS_SECTORS=$(( 64 * 1024 * 2 ))
+EXT3_BACKUP_FS_SECTORS=$(( 8 * 1024 * 2 ))
+QI_ALLOCATION=$(( 256 * 2 ))
+#
+# lastly fixed stuff: 8KByte initial boot, sig, padding
+
+# ----------------------
+
+echo "s3c6410 bootable SD partitioning utility"
+echo "(C) Openmoko, Inc  Andy Green <andy@openmoko.com>"
+echo
+
+# these are fixed in iROM
+QI_INITIAL=$(( 8 * 2 ))
+SIG=1
+
+FDISK_SCRIPT=/tmp/_fds
+
+if [ -z $1 -o -z $2 -o -z $3 ] ; then
+  echo "This formats a SD card for usage on SD Card boot"
+  echo "  on 6410 based systems"
+  echo
+  echo "Usage:"
+  echo
+  echo "$0 <device for SD, eg, sde> <sd|sdhc> <bootloader>"
+  exit 1
+fi
+
+if [ $2 = "sdhc" ] ; then
+PADDING=1025
+else
+PADDING=1
+fi
+
+EXT3_TOTAL_SECTORS=$(( $EXT3_ROOTFS_SECTORS + $EXT3_BACKUP_FS_SECTORS ))
+REARSECTORS=$(( $QI_ALLOCATION + $QI_INITIAL + $SIG + $PADDING ))
+
+if [ ! -z "`grep $1 /proc/mounts`" ] ; then
+  echo "ERROR $1 seems to be mounted, that ain't right"
+  exit 2
+fi
+
+SECTORS=`dmesg | grep $1 | grep "512-byte hardware" | tail -n 1 | cut -d' ' -f4`
+
+if [ $SECTORS -le 0 ] ; then
+  echo "problem finding size for /dev/$1"
+  exit 3
+fi
+
+if [ -z "$4" ] ; then
+
+  echo "$1 is $SECTORS 512-byte blocks"
+
+  FATSECTORS=$(( $SECTORS - $EXT3_TOTAL_SECTORS + $REARSECTORS ))
+  FATMB=$(( $FATSECTORS / 2048 - 16 ))
+
+  echo "Creating VFAT section $FATMB MB"
+
+  # create the script for fdisk
+  # clear the existing partition table
+  echo "o" >$FDISK_SCRIPT
+
+  # add main VFAT storage partition
+  echo "n" >>$FDISK_SCRIPT
+  echo "p" >>$FDISK_SCRIPT
+  echo "1" >>$FDISK_SCRIPT
+  # first partition == 1
+  echo "1" >>$FDISK_SCRIPT
+  echo "+$FATMB"M >>$FDISK_SCRIPT
+
+  # add the normal EXT3 rootfs
+  echo "n" >>$FDISK_SCRIPT
+  echo "p" >>$FDISK_SCRIPT
+  echo "2" >>$FDISK_SCRIPT
+  # continue after last
+  echo "" >>$FDISK_SCRIPT
+  echo "+$(( $EXT3_ROOTFS_SECTORS / 2048 ))"M >>$FDISK_SCRIPT
+
+  # add the backup EXT3 rootfs
+  echo "n" >>$FDISK_SCRIPT
+  echo "p" >>$FDISK_SCRIPT
+  echo "3" >>$FDISK_SCRIPT
+  # continue after last
+  echo "" >>$FDISK_SCRIPT
+  echo "+$(( $EXT3_BACKUP_FS_SECTORS / 2048 ))"M >>$FDISK_SCRIPT
+
+  # commit it and exit
+  echo "w" >>$FDISK_SCRIPT
+  echo "q" >>$FDISK_SCRIPT
+
+  # do the partitioning action
+  fdisk /dev/$1 <$FDISK_SCRIPT
+
+  # prep the filesystems
+
+  mkfs.vfat "/dev/$1"1 -n main-vfat
+  mkfs.ext3 "/dev/$1"2 -L rootfs
+  mkfs.ext3 "/dev/$1"3 -L backupfs
+
+fi # if -z $4
+
+# copy the full bootloader image to the right place after the
+# partitioned area
+dd if=$3 of=/dev/$1 bs=512 count=512 \
+  seek=$(( $SECTORS - $REARSECTORS ))
+dd if=$3 of=/dev/$1 bs=512 \
+  seek=$(( $SECTORS - $REARSECTORS + $QI_ALLOCATION )) \
+  count=$QI_INITIAL
+dd if=/dev/zero of=/dev/$1 bs=512 \
+  seek=$(( $SECTORS - $REARSECTORS + $QI_ALLOCATION + $QI_INITIAL )) \
+  count=$(( $SIG + $PADDING ))
+
+# done
+echo
+echo "**** completed"