ipq40xx: add target

[openwrt/staging/stintel.git] / target / linux / ipq40xx / base-files / lib / upgrade / openmesh.sh

diff --git a/target/linux/ipq40xx/base-files/lib/upgrade/openmesh.sh b/target/linux/ipq40xx/base-files/lib/upgrade/openmesh.sh
new file mode 100644 (file)
index 0000000..71ab247
--- /dev/null
+++ b/target/linux/ipq40xx/base-files/lib/upgrade/openmesh.sh
@@ -0,0 +1,110 @@
+# The U-Boot loader of the OpenMesh devices requires image sizes and
+# checksums to be provided in the U-Boot environment.
+# The OpenMesh devices come with 2 main partitions - while one is active
+# sysupgrade will flash the other. The boot order is changed to boot the
+# newly flashed partition. If the new partition can't be booted due to
+# upgrade failures the previously used partition is loaded.
+
+platform_do_upgrade_openmesh() {
+       local tar_file="$1"
+       local restore_backup
+       local primary_kernel_mtd
+
+       local setenv_script="/tmp/fw_env_upgrade"
+
+       local kernel_mtd="$(find_mtd_index $PART_NAME)"
+       local kernel_offset="$(cat /sys/class/mtd/mtd${kernel_mtd}/offset)"
+       local total_size="$(cat /sys/class/mtd/mtd${kernel_mtd}/size)"
+
+       # detect to which flash region the new image is written to.
+       #
+       # 1. check what is the mtd index for the first flash region on this
+       #    device
+       # 2. check if the target partition ("inactive") has the mtd index of
+       #    the first flash region
+       #
+       #    - when it is: the new bootseq will be 1,2 and the first region is
+       #      modified
+       #    - when it isnt: bootseq will be 2,1 and the second region is
+       #      modified
+       #
+       # The detection has to be done via the hardcoded mtd partition because
+       # the current boot might be done with the fallback region. Let us
+       # assume that the current bootseq is 1,2. The bootloader detected that
+       # the image in flash region 1 is corrupt and thus switches to flash
+       # region 2. The bootseq in the u-boot-env is now still the same and
+       # the sysupgrade code can now only rely on the actual mtd indexes and
+       # not the bootseq variable to detect the currently booted flash
+       # region/image.
+       #
+       # In the above example, an implementation which uses bootseq ("1,2") to
+       # detect the currently booted image would assume that region 1 is booted
+       # and then overwrite the variables for the wrong flash region (aka the
+       # one which isn't modified). This could result in a device which doesn't
+       # boot anymore to Linux until it was reflashed with ap51-flash.
+       local next_boot_part="1"
+       case "$(board_name)" in
+       openmesh,a42)
+               primary_kernel_mtd=8
+               ;;
+       *)
+               echo "failed to detect primary kernel mtd partition for board"
+               return 1
+               ;;
+       esac
+       [ "$kernel_mtd" = "$primary_kernel_mtd" ] || next_boot_part="2"
+
+       local board_dir=$(tar tf $tar_file | grep -m 1 '^sysupgrade-.*/$')
+       board_dir=${board_dir%/}
+
+       local kernel_length=$(tar xf $tar_file ${board_dir}/kernel -O | wc -c)
+       local rootfs_length=$(tar xf $tar_file ${board_dir}/root -O | wc -c)
+       # rootfs without EOF marker
+       rootfs_length=$((rootfs_length-4))
+
+       local kernel_md5=$(tar xf $tar_file ${board_dir}/kernel -O | md5sum); kernel_md5="${kernel_md5%% *}"
+       # md5 checksum of rootfs with EOF marker
+       local rootfs_md5=$(tar xf $tar_file ${board_dir}/root -O | dd bs=1 count=$rootfs_length | md5sum); rootfs_md5="${rootfs_md5%% *}"
+
+       #
+       # add tar support to get_image() to use default_do_upgrade() instead?
+       #
+
+       # take care of restoring a saved config
+       [ "$SAVE_CONFIG" -eq 1 ] && restore_backup="${MTD_CONFIG_ARGS} -j ${CONF_TAR}"
+
+       # write concatinated kernel + rootfs to flash
+       tar xf $tar_file ${board_dir}/kernel ${board_dir}/root -O | \
+               mtd $restore_backup write - $PART_NAME
+
+       # prepare new u-boot env
+       if [ "$next_boot_part" = "1" ]; then
+               echo "bootseq 1,2" > $setenv_script
+       else
+               echo "bootseq 2,1" > $setenv_script
+       fi
+
+       printf "kernel_size_%i 0x%08x\n" $next_boot_part $kernel_length >> $setenv_script
+       printf "vmlinux_start_addr 0x%08x\n" ${kernel_offset} >> $setenv_script
+       printf "vmlinux_size 0x%08x\n" ${kernel_length} >> $setenv_script
+       printf "vmlinux_checksum %s\n" ${kernel_md5} >> $setenv_script
+
+       printf "rootfs_size_%i 0x%08x\n" $next_boot_part $((total_size-kernel_length)) >> $setenv_script
+       printf "rootfs_start_addr 0x%08x\n" $((kernel_offset+kernel_length)) >> $setenv_script
+       printf "rootfs_size 0x%08x\n" ${rootfs_length} >> $setenv_script
+       printf "rootfs_checksum %s\n" ${rootfs_md5} >> $setenv_script
+
+       # store u-boot env changes
+       fw_setenv -s $setenv_script || {
+               echo "failed to update U-Boot environment"
+               return 1
+       }
+}
+
+# create /var/lock for the lock "fw_setenv.lock" of fw_setenv
+# the rest is copied using ipq806x's RAMFS_COPY_BIN and RAMFS_COPY_DATA
+platform_add_ramfs_ubootenv()
+{
+       mkdir -p $RAM_ROOT/var/lock
+}
+append sysupgrade_pre_upgrade platform_add_ramfs_ubootenv