target/linux/ipq40xx/base-files/lib/upgrade/linksys.sh

   1 linksys_get_target_firmware() {
   2         cur_boot_part=$(/usr/sbin/fw_printenv -n boot_part)
   3         target_firmware=""
   4         if [ "$cur_boot_part" = "1" ]; then
   5                 # current primary boot - update alt boot
   6                 target_firmware="alt_kernel"
   7                 fw_setenv boot_part 2
   8                 # In the Linksys EA6350v3, it is enough to set the boot_part as the boot command line is
   9                 # bootcmd=if test $boot_part = 1; then run bootpart1; else run bootpart2; fi
  10                 # - You probably want to use that if your device's uboot does not eval bootcmd
  11                 #fw_setenv bootcmd "run altnandboot"
  12         elif [ "$cur_boot_part" = "2" ]; then
  13                 # current alt boot - update primary boot
  14                 target_firmware="kernel"
  15                 fw_setenv boot_part 1
  16                 #fw_setenv bootcmd "run nandboot"
  17         fi
  18
  19         # re-enable recovery so we get back if the new firmware is broken
  20         fw_setenv auto_recovery yes
  21         # see /etc/init.d/zlinksys_recovery
  22
  23         echo "$target_firmware"
  24 }
  25
  26 linksys_get_root_magic() {
  27         (get_image "$@" | dd skip=786432 bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
  28 }
  29
  30 platform_do_upgrade_linksys() {
  31         local magic_long="$(get_magic_long "$1")"
  32
  33         mkdir -p /var/lock
  34         local part_label="$(linksys_get_target_firmware)"
  35         touch /var/lock/fw_printenv.lock
  36
  37         if [ ! -n "$part_label" ]; then
  38                 echo "cannot find target partition"
  39                 exit 1
  40         fi
  41
  42         local target_mtd=$(find_mtd_part $part_label)
  43
  44         [ "$magic_long" = "73797375" ] && {
  45                 CI_KERNPART="$part_label"
  46                 if [ "$part_label" = "kernel" ]; then
  47                         CI_UBIPART="rootfs"
  48                 else
  49                         CI_UBIPART="alt_rootfs"
  50                 fi
  51
  52                 # remove "squashfs" vol (in case we are flashing over a stock image, which is also UBI)
  53
  54                 local mtdnum="$( find_mtd_index "$CI_UBIPART" )"
  55                 if [ ! "$mtdnum" ]; then
  56                         echo "cannot find ubi mtd partition $CI_UBIPART"
  57                         return 1
  58                 fi
  59
  60                 local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
  61                 if [ ! "$ubidev" ]; then
  62                         ubiattach -m "$mtdnum"
  63                         sync
  64                         ubidev="$( nand_find_ubi "$CI_UBIPART" )"
  65                 fi
  66
  67                 if [ "$ubidev" ]; then
  68                         local squash_ubivol="$( nand_find_volume $ubidev squashfs )"
  69                         # kill volume
  70                         [ "$squash_ubivol" ] && ubirmvol /dev/$ubidev -N squashfs || true
  71                 fi
  72
  73                 # complete std upgrade
  74                 nand_upgrade_tar "$1"
  75         }
  76         [ "$magic_long" = "27051956" ] && {
  77                 # This magic is for a uImage (which is a sysupgrade image)
  78                 # check firmwares' rootfs types
  79                 local oldroot="$(linksys_get_root_magic $target_mtd)"
  80                 local newroot="$(linksys_get_root_magic "$1")"
  81
  82                 if [ "$newroot" = "55424923" -a "$oldroot" = "55424923" ]; then
  83                         # we're upgrading from a firmware with UBI to one with UBI
  84                         # erase everything to be safe
  85                         # - Is that really needed? Won't remove (or comment) the if, because it may be needed in a future device.
  86                         #mtd erase $part_label
  87                         #get_image "$1" | mtd -n write - $part_label
  88                         echo "writing \"$1\" UBI image to \"$part_label\" (UBI)..."
  89                         get_image "$1" | mtd write - $part_label
  90                 else
  91                         echo "writing \"$1\" image to \"$part_label\""
  92                         get_image "$1" | mtd write - $part_label
  93                 fi
  94         }
  95 }