target/linux/bcm53xx/base-files/lib/upgrade/platform.sh

   1 PART_NAME=firmware
   2
   3 # $(1): file to read magic from
   4 # $(2): offset in bytes
   5 get_magic_long_at() {
   6         dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%02x"'
   7 }
   8
   9 platform_flash_type() {
  10         # On NAND devices "rootfs" is UBI volume, so won't be find in /proc/mtd
  11         grep -q "\"rootfs\"" /proc/mtd && {
  12                 echo "serial"
  13                 return
  14         }
  15
  16         echo "nand"
  17 }
  18
  19 platform_identify() {
  20         local magic
  21
  22         magic=$(get_magic_long "$1")
  23         case "$magic" in
  24                 "48445230")
  25                         echo "trx"
  26                         return
  27                         ;;
  28                 "2a23245e")
  29                         echo "chk"
  30                         return
  31                         ;;
  32         esac
  33
  34         magic=$(get_magic_long_at "$1" 14)
  35         [ "$magic" = "55324e44" ] && {
  36                 echo "cybertan"
  37                 return
  38         }
  39
  40         echo "unknown"
  41 }
  42
  43 platform_check_image() {
  44         [ "$#" -gt 1 ] && return 1
  45
  46         [ "$(platform_flash_type)" = "nand" ] && {
  47                 echo "Firmware upgrade on NAND devices is not implemented."
  48                 return 1
  49         }
  50
  51         local file_type=$(platform_identify "$1")
  52
  53         case "$file_type" in
  54                 "chk")
  55                         local header_len=$((0x$(get_magic_long_at "$1" 4)))
  56                         local board_id_len=$(($header_len - 40))
  57                         local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
  58                         echo "Found CHK image with device board_id $board_id"
  59
  60                         magic=$(get_magic_long_at "$1" "$header_len")
  61                         [ "$magic" != "48445230" ] && {
  62                                 echo "No valid TRX firmware in the CHK image"
  63                                 return 1
  64                         }
  65
  66                         return 0
  67                 ;;
  68                 "cybertan")
  69                         local magic=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
  70                         echo "Found CyberTAN image with device magic: $magic"
  71
  72                         magic=$(get_magic_long_at "$1" 32)
  73                         [ "$magic" != "48445230" ] && {
  74                                 echo "No valid TRX firmware in the CyberTAN image"
  75                                 return 1
  76                         }
  77
  78                         return 0
  79                 ;;
  80                 "trx")
  81                         return 0
  82                 ;;
  83                 *)
  84                         echo "Invalid image type. Please use only .trx files"
  85                         return 1
  86                 ;;
  87         esac
  88 }
  89
  90 # Extract TRX and use stadard upgrade method
  91 platform_do_upgrade_chk() {
  92         local header_len=$((0x$(get_magic_long_at "$1" 4)))
  93         local trx="/tmp/$1.trx"
  94
  95         dd if="$1" of="$trx" bs=$header_len skip=1
  96         shift
  97         platform_do_upgrade_trx "$trx" "$@"
  98 }
  99
 100 # Extract TRX and use stadard upgrade method
 101 platform_do_upgrade_cybertan() {
 102         local trx="/tmp/$1.trx"
 103
 104         dd if="$1" of="$trx" bs=32 skip=1
 105         shift
 106         platform_do_upgrade_trx "$trx" "$@"
 107 }
 108
 109 platform_do_upgrade_trx() {
 110         local flash_type=$(platform_flash_type)
 111
 112         case "$flash_type" in
 113                 "serial")
 114                         default_do_upgrade "$@"
 115                 ;;
 116                 "nand")
 117                         echo "Firmware upgrade on NAND devices is REALLY unsupported."
 118                 ;;
 119         esac
 120 }
 121
 122 platform_do_upgrade() {
 123         local file_type=$(platform_identify "$1")
 124
 125         case "$file_type" in
 126                 "chk")          platform_do_upgrade_chk "$ARGV";;
 127                 "cybertan")     platform_do_upgrade_cybertan "$ARGV";;
 128                 *)              platform_do_upgrade_trx "$ARGV";;
 129         esac
 130 }