bc173ddd83
New U-Boot version for MediaTek MT76x8/MT762x based ALFA Network boards
includes support for a 'dual image' feature. Users can enable it using
U-Boot environment variable 'dual_image' ('1' -> enabled).
When 'dual image' feature is enabled, U-Boot will modify DTB and divide
the original 'firmware' flash area into two, equal in size and aligned
to 64 KB partitions: 'firmware' and 'backup'. U-Boot will also adjust
size of 'firmware' area to match installed flash chip size.
U-Boot will load kernel from active partition which is marked with env
variable 'bootactive' ('1' -> first partition, '2' -> second partition)
and rename both partitions accordingly ('firmware' <-> 'backup').
There are 3 additional env variables used to control 'dual image' mode:
- bootlimit - maximum number of unsuccessful boot tries (default: '3')
- bootcount - current number of boot tries
- bootchanged - flag which informs that active partition was changed; if
it is set and 'bootcount' reaches 'bootlimit' value,
U-Boot will start web-based recovery which then updates
both partitions with provided image
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
36 lines
694 B
Bash
Executable file
36 lines
694 B
Bash
Executable file
#
|
|
# Copyright (C) 2010 OpenWrt.org
|
|
#
|
|
|
|
PART_NAME=firmware
|
|
REQUIRE_IMAGE_METADATA=1
|
|
|
|
RAMFS_COPY_BIN='fw_printenv fw_setenv'
|
|
RAMFS_COPY_DATA='/etc/fw_env.config /var/lock/fw_printenv.lock'
|
|
|
|
platform_check_image() {
|
|
return 0
|
|
}
|
|
|
|
platform_do_upgrade() {
|
|
local board=$(board_name)
|
|
|
|
case "$board" in
|
|
alfa-network,ac1200rm|\
|
|
alfa-network,tube-e4g)
|
|
[ "$(fw_printenv -n dual_image 2>/dev/null)" = "1" ] &&\
|
|
[ -n "$(find_mtd_part backup)" ] && {
|
|
PART_NAME=backup
|
|
if [ "$(fw_printenv -n bootactive 2>/dev/null)" = "1" ]; then
|
|
fw_setenv bootactive 2 || exit 1
|
|
else
|
|
fw_setenv bootactive 1 || exit 1
|
|
fi
|
|
}
|
|
default_do_upgrade "$1"
|
|
;;
|
|
*)
|
|
default_do_upgrade "$1"
|
|
;;
|
|
esac
|
|
}
|