[atheros] Implement a preliminary combined image format.

[openwrt-10.03/.git] / target / linux / atheros / base-files / lib / upgrade / platform.sh

diff --git a/target/linux/atheros/base-files/lib/upgrade/platform.sh b/target/linux/atheros/base-files/lib/upgrade/platform.sh
new file mode 100644 (file)
index 0000000..d4daaac
--- /dev/null
+++ b/target/linux/atheros/base-files/lib/upgrade/platform.sh
@@ -0,0 +1,76 @@
+CI_BLKSZ=65536
+CI_LDADR=0x80041000
+
+platform_find_partitions() {
+       local first dev size erasesize name
+       while read dev size erasesize name; do
+               name=${name#'"'}; name=${name%'"'}
+               case "$name" in
+                       vmlinux.bin.l7|kernel|linux|rootfs)
+                               if [ -z "$first" ]; then
+                                       first="$name"
+                               else
+                                       echo "$erasesize:$first:$name"
+                                       break
+                               fi
+                       ;;
+               esac
+       done < /proc/mtd
+}
+
+platform_find_kernelpart() {
+       local part
+       for part in "${1%:*}" "${1#*:}"; do
+               case "$part" in
+                       vmlinux.bin.l7|kernel|linux)
+                               echo "$part"
+                               break
+                       ;;
+               esac
+       done
+}
+
+platform_check_image() {
+       [ "$ARGC" -gt 1 ] && return 1
+
+       case "$(get_magic_word "$1")" in
+               # Combined Image
+               4349)
+                       local md5_img=$(dd if="$1" bs=2 skip=9 count=16 2>/dev/null)
+                       local md5_chk=$(dd if="$1" bs=$CI_BLKSZ skip=1 2>/dev/null | md5sum -); md5_chk="${md5_chk%% *}"
+
+                       if [ -n "$md5_img" -a -n "$md5_chk" ] && [ "$md5_img" = "$md5_chk" ]; then
+                               return 0
+                       else
+                               echo "Invalid image. Contents do not match checksum (image:$md5_img calculated:$md5_chk)"
+                               return 1
+                       fi
+               ;;
+               *)
+                       echo "Invalid image. Use combined .img files on this platform"
+                       return 1
+               ;;
+       esac
+}
+
+platform_do_upgrade() {
+       local partitions=$(platform_find_partitions)
+       local kernelpart=$(platform_find_kernelpart "${partitions#*:}")
+       local erase_size=$((0x${partitions%%:*})); partitions="${partitions#*:}"
+       local kern_length=0x$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)
+       local kern_blocks=$(($kern_length / $CI_BLKSZ))
+       local root_blocks=$((0x$(dd if="$1" bs=2 skip=5 count=4 2>/dev/null) / $CI_BLKSZ))
+
+       if [ -n "$partitions" ] && [ -n "$kernelpart" ] && \
+          [ ${kern_blocks:-0} -gt 0 ] && \
+          [ ${root_blocks:-0} -gt ${kern_blocks:-0} ] && \
+          [ ${erase_size:-0} -gt 0 ];
+       then
+               local append=""
+               [ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
+
+               ( dd if="$1" bs=$CI_BLKSZ skip=1 count=$kern_blocks 2>/dev/null; \
+                 dd if="$1" bs=$CI_BLKSZ skip=$((1+$kern_blocks)) count=$root_blocks 2>/dev/null ) | \
+                       mtd -r $append -F$kernelpart:$kern_length:$CI_LDADR,rootfs write - $partitions
+       fi
+}