bcm53xx: properly support sysupgrade using Seama on NAND devices

It updates kernel and then formats UBI without loosing erase counters.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

diff --git a/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh b/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh
index d613595a66a8c8e2980d2d911c19d9818aa5d0f9..f0a48ddeeca76b92f0cee66a94e40a42adf83925 100644 (file)
--- a/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh
@@ -197,6 +197,53 @@ platform_pre_upgrade_trx() {
        nand_do_upgrade /tmp/root.ubi
 }
 
+platform_pre_upgrade_seama() {
+       local dir="/tmp/sysupgrade-bcm53xx"
+       local seama="$1"
+       local tmp
+
+       # Extract Seama entity from Seama seal
+       rm -fR $dir
+       mkdir -p $dir
+       oseama extract "$seama" \
+               -e 0 \
+               -o $dir/seama.entity
+       [ $? -ne 0 ] && {
+               echo "Failed to extract Seama entity."
+               return
+       }
+       local entity_size=$(wc -c $dir/seama.entity | cut -d ' ' -f 1)
+
+       local ubi_offset=0
+       tmp=0
+       while [ 1 ]; do
+               [ $tmp -ge $entity_size ] && break
+               [ "$(dd if=$dir/seama.entity skip=$tmp bs=1 count=4 2>/dev/null)" = "UBI#" ] && {
+                       ubi_offset=$tmp
+                       break
+               }
+               tmp=$(($tmp + 131072))
+       done
+       [ $ubi_offset -eq 0 ] && {
+               echo "Failed to find UBI in Seama entity."
+               return
+       }
+
+       local ubi_length=0
+       while [ "$(dd if=$dir/seama.entity skip=$(($ubi_offset + $ubi_length)) bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
+               ubi_length=$(($ubi_length + 131072))
+       done
+
+       dd if=$dir/seama.entity of=$dir/kernel.seama bs=131072 count=$(($ubi_offset / 131072)) 2>/dev/null
+       dd if=$dir/seama.entity of=$dir/root.ubi bs=131072 skip=$(($ubi_offset / 131072)) count=$(($ubi_length / 131072)) 2>/dev/null
+
+       # Flash
+       local kernel_size=$(sed -n 's/mtd[0-9]*: \([0-9a-f]*\).*"\(kernel\|linux\)".*/\1/p' /proc/mtd)
+       mtd write $dir/kernel.seama firmware
+       mtd ${kernel_size:+-c 0x$kernel_size} fixseama firmware
+       nand_do_upgrade $dir/root.ubi
+}
+
 platform_pre_upgrade() {
        export RAMFS_COPY_BIN="${RAMFS_COPY_BIN} /usr/bin/oseama /bin/sed"
 
@@ -208,7 +255,7 @@ platform_pre_upgrade() {
        case "$file_type" in
                "chk")          platform_pre_upgrade_trx "$1" $((0x$(get_magic_long_at "$1" 4)));;
                "cybertan")     platform_pre_upgrade_trx "$1" 32;;
-               "seama")        return;;
+               "seama")        platform_pre_upgrade_seama "$1";;
                "trx")          platform_pre_upgrade_trx "$1";;
        esac
 }