target/linux/mediatek/mt7622/base-files/lib/upgrade/buffalo.sh

   1 # ======== dev note ========
   2 # for following buffalo MT7622 devices:
   3 #
   4 # - WSR-2533DHP2 (trx magic: "DHP2")
   5 # - WSR-2533DHP3 (trx magic: "DHP3")
   6 # - WSR-3200AX4S (trx magic: "DHP3")
   7 #
   8 # sysupgrade-tar image:
   9 #
  10 # This is for normal upgrading for OpenWrt.
  11 # use nand_do_upgrade with CI_KERNPART="firmware"
  12 #
  13 # - if the size of new kernel is not equal with the current kernel's
  14 #   -> block upgrade and print a message about using TRX + UBI
  15 #      formatted image
  16 #   (should be flashed the new ubi contains rootfs + rootfs_data
  17 #   with the offset (=new padded kernel's end) if this case? But
  18 #   it maybe too hard for writing scripts...)
  19 #
  20 # TRX + UBI formatted image:
  21 #
  22 # This is for upgrading if the new kernel is larger than the
  23 # current kernel.
  24 #
  25 # ex:
  26 #   - stock firmware is installed in the flash and booted with
  27 #     OpenWrt initramfs image
  28 #   - kernel partition is increased from 4MiB in OpenWrt in the
  29 #     future
  30 #
  31 # packing TRX + UBI formatted image by tar is needed for image validation
  32 # with the metadata in the future?
  33 # ====== dev note end ======
  34 #
  35 # The mtd partitions "firmware" and "Kernel2" on NAND flash are os-image
  36 # partitions. These partitions are called as "Image1/Image2" in U-Boot
  37 # on WSR-2533DHP2, and they are checked conditions when booting.
  38 # "Image1" is always used for booting.
  39 #
  40 # == U-Boot Behaviors ==
  41 # - "Image1"/"Image2" images are good, images are different or
  42 #   "Image2" image is broken
  43 #   -> writes os-image to "Image2" from "Image1"
  44 #
  45 # - "Image1" image is broken
  46 #   -> writes os-image to "Image1" from "Image2"
  47 #
  48 # - "Image1"/"Image2" images are broken
  49 #   -> fall to U-Boot command line
  50
  51 buffalo_check_image() {
  52         local board="$1"
  53         local boardname="$(echo $board | tr ',' '_')"
  54         local magic="$2"
  55         local fw_image="$3"
  56
  57         # return error state if TRX + UBI formatted image specified
  58         # to notify about configurations
  59         if [ "$magic" = "44485032" -o "$magic" = "44485033" ]; then
  60                 echo "Your configurations won't be saved if factory-uboot.bin image specified."
  61                 echo "But if you want to upgrade, please execute sysupgrade with \"-F\" option."
  62                 return 1
  63         fi
  64
  65         # check if valid tar file specifed
  66         if ! tar tf "$fw_image" &>/dev/null; then
  67                 echo "Specified file is not a tar archive: $fw_image"
  68                 return 1
  69         fi
  70
  71         local control_len=$( (tar xf $fw_image sysupgrade-$boardname/CONTROL -O | wc -c) 2> /dev/null)
  72
  73         # check if valid sysupgrade tar archive
  74         if [ "$control_len" = "0" ]; then
  75                 echo "Invalid sysupgrade file: $fw_image"
  76                 return 1
  77         fi
  78
  79         local kern_part_len=$(grep "\"linux\"" /proc/mtd | sed "s/mtd[0-9]*:[ \t]*\([^ \t]*\).*/\1/")
  80         [ -z "$kern_part_len" ] && {
  81                 echo "Unable to get \"linux\" partition size"
  82                 return 1
  83         }
  84         kern_part_len=$((0x$kern_part_len))
  85
  86         # this also checks if the sysupgrade image is for correct models
  87         local kern_bin_len=$( (tar xf $fw_image sysupgrade-${boardname}/kernel -O | wc -c) 2> /dev/null)
  88         if [ -z "$kern_bin_len" ]; then
  89                 echo "Failed to get new kernel size, is valid sysupgrade image specified for the device?"
  90                 return 1
  91         fi
  92
  93         # kernel binary has a trx header (len: 28 (0x1c))
  94         kern_bin_len=$((kern_bin_len - 28))
  95
  96         if [ "$kern_bin_len" != "$kern_part_len" ]; then
  97                 echo -n "The length of new kernel is invalid for current "
  98                 echo "\"linux\" partition, please use factory-uboot.bin image."
  99                 echo "\"linux\" partition: $kern_part_len, new kernel: $kern_bin_len"
 100                 return 1
 101         fi
 102 }
 103
 104 # for TRX + UBI formatted image
 105 buffalo_upgrade_ubinized() {
 106         sync
 107         echo 3 > /proc/sys/vm/drop_caches
 108
 109         local mtdnum="$( find_mtd_index "ubi" )"
 110         # if no "ubi", don't return error for the purpose of recovery
 111         # ex: recovery after accidental erasing "firmware" partition
 112         if [ ! "$mtdnum" ]; then
 113                 echo "cannot find ubi mtd partition \"ubi\", skip detachment"
 114         else
 115                 ubidetach -m "$mtdnum"
 116         fi
 117
 118         # erase all data in "firmware"
 119         mtd erase "${PART_NAME}"
 120         # write TRX + UBI formatted image to "firmware"
 121         get_image "$1" | mtd $MTD_ARGS write - "${PART_NAME:-firmware}"
 122         if [ $? -ne 0 ]; then
 123                 echo "Failed to write the specified image."
 124                 exit 1
 125         fi
 126 }