brcm47xx: image: share function checking TRX in provided firmware
[openwrt/openwrt.git] / target / linux / brcm47xx / base-files / lib / upgrade / platform.sh
index 8c09706..f5b9bda 100644 (file)
@@ -77,6 +77,20 @@ brcm47xx_identify() {
        echo "unknown"
 }
 
+# $(1): image that should contain trx
+# $(2): trx offset in image
+platform_check_image_trx() {
+       local magic=$(get_magic_long_at "$1" $2)
+
+       [ "$magic" != "48445230" ] && {
+               return 1
+       }
+
+       # TODO: Check crc32
+
+       return 0
+}
+
 platform_check_image() {
        [ "$#" -gt 1 ] && return 1
 
@@ -97,11 +111,10 @@ platform_check_image() {
                                error=1
                        }
 
-                       magic=$(get_magic_long_at "$1" "$header_len")
-                       [ "$magic" != "48445230" ] && {
+                       if ! platform_check_image_trx "$1" "$header_len"; then
                                echo "No valid TRX firmware in the CHK image"
                                error=1
-                       }
+                       fi
                ;;
                "cybertan")
                        local pattern=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
@@ -113,11 +126,10 @@ platform_check_image() {
                                error=1
                        }
 
-                       magic=$(get_magic_long_at "$1" 32)
-                       [ "$magic" != "48445230" ] && {
+                       if ! platform_check_image_trx "$1" 32; then
                                echo "No valid TRX firmware in the CyberTAN image"
                                error=1
-                       }
+                       fi
                ;;
                "trx")
                ;;