#!/bin/bash
# B23 rollback - restore the B18 cache (ac82811a: kernel b18 + DTB b18, LBC 450 mA). Needs 9008 via HW EDL. Deeper: b18/B18-rollback.sh (B15).
cd ~/doc/modem/jz08-aurora || exit 1
L=firehose/007050e100000000_394a2e47cf830150_fhprg_peek.bin ; O=logs/b23/rollback ; mkdir -p $O
B=b18/cache/cache-extlinux-b18.img
[ "$(sha256sum $B | cut -d' ' -f1)" = ac82811ad88d111c673bd3e14ff9cd635e16b87869ce0d0e0070b28b35947e01 ] || { echo "STOP: rollback image hash"; exit 1; }
lsusb | grep -q 05c6:9008 || { echo "STOP: no 9008"; exit 1; }
edl --loader=$L printgpt > $O/00-printgpt.log 2>&1
edl --loader=$L w cache $B > $O/cache-w.log 2>&1
edl --loader=$L r cache $O/cache-rb.bin > /dev/null 2>&1 ; cmp $B $O/cache-rb.bin && echo CACHE_RESTORED_B18
sha256sum $B $O/cache-rb.bin