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#!/bin/sh
#
# Copyright (C) 2015-2016 Chris Blake <chrisrblake93@gmail.com>
#
# Custom upgrade script for Meraki NAND devices (ex. MR18)
# Based on dir825.sh and stock nand functions
#
. /lib/ar71xx.sh
. /lib/functions.sh
get_magic_at() {
local mtddev=$1
local pos=$2
dd bs=1 count=2 skip=$pos if=$mtddev 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
}
meraki_is_caldata_valid() {
local board=$1
local mtddev=$2
local magic
case "$board" in
"mr18")
magic=$(get_magic_at $mtddev 4096)
[ "$magic" != "0202" ] && return 0
magic=$(get_magic_at $mtddev 20480)
[ "$magic" != "0202" ] && return 0
magic=$(get_magic_at $mtddev 36864)
[ "$magic" != "0202" ] && return 0
return 1
;;
"z1")
magic=$(get_magic_at $mtddev 4096)
[ "$magic" != "0202" ] && return 0
magic=$(get_magic_at $mtddev 86016)
[ "$magic" != "a55a" ] && return 0
return 1
;;
*)
return 1
;;
esac
}
merakinand_copy_caldata() {
local cal_src=$1
local cal_dst=$2
local ubidev="$(nand_find_ubi $CI_UBIPART)"
local board_name="$(board_name)"
local rootfs_size="$(ubinfo /dev/ubi0 -N rootfs_data | grep "Size" | awk '{ print $6 }')"
# Setup partitions using board name, in case of future platforms
case "$board_name" in
"mr18"|\
"z1")
# Src is MTD
mtd_src="$(find_mtd_chardev $cal_src)"
[ -n "$mtd_src" ] || {
echo "no mtd device found for partition $cal_src"
exit 1
}
# Dest is UBI
# TODO: possibly add create (hard to do when rootfs_data is expanded & mounted)
# Would need to be done from ramdisk
mtd_dst="$(nand_find_volume $ubidev $cal_dst)"
[ -n "$mtd_dst" ] || {
echo "no ubi device found for partition $cal_dst"
exit 1
}
meraki_is_caldata_valid "$board_name" "$mtd_src" && {
echo "no valid calibration data found in $cal_src"
exit 1
}
meraki_is_caldata_valid "$board_name" "/dev/$mtd_dst" && {
echo "Copying calibration data from $cal_src to $cal_dst..."
dd if="$mtd_src" of=/tmp/caldata.tmp 2>/dev/null
ubiupdatevol "/dev/$mtd_dst" /tmp/caldata.tmp
rm /tmp/caldata.tmp
sync
}
return 0
;;
*)
echo "Unsupported device $board_name";
return 1
;;
esac
}
merakinand_do_kernel_check() {
local board_name="$1"
local tar_file="$2"
local image_magic_word=`(tar xf $tar_file sysupgrade-$board_name/kernel -O 2>/dev/null | dd bs=1 count=4 skip=0 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"')`
# What is our kernel magic string?
case "$board_name" in
"mr18")
[ "$image_magic_word" == "8e73ed8a" ] && {
echo "pass" && return 0
}
;;
"z1")
[ "$image_magic_word" == "4d495053" ] && {
echo "pass" && return 0
}
;;
esac
exit 1
}
merakinand_do_platform_check() {
local board_name="$1"
local tar_file="$2"
local control_length=`(tar xf $tar_file sysupgrade-$board_name/CONTROL -O | wc -c) 2> /dev/null`
local file_type="$(identify_tar $2 sysupgrade-$board_name/root)"
local kernel_magic="$(merakinand_do_kernel_check $1 $2)"
case "$board_name" in
"mr18"|\
"z1")
[ "$control_length" = 0 -o "$file_type" != "squashfs" -o "$kernel_magic" != "pass" ] && {
echo "Invalid sysupgrade file for $board_name"
return 1
}
;;
*)
echo "Unsupported device $board_name";
return 1
;;
esac
return 0
}
merakinand_do_upgrade() {
local tar_file="$1"
local board_name="$(board_name)"
# Do we need to do any platform tweaks?
case "$board_name" in
"mr18")
# Check and create UBI caldata if it's invalid
merakinand_copy_caldata "odm-caldata" "caldata"
nand_do_upgrade $1
;;
"z1")
# Check and create UBI caldata if it's invalid
merakinand_copy_caldata "origcaldata" "caldata"
nand_do_upgrade $1
;;
*)
echo "Unsupported device $board_name";
exit 1
;;
esac
}
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