brcm47xx: image: share function checking TRX in provided firmware

This will allow us to calculate crc32 in a shared code.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45202 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/brcm47xx/base-files/lib/upgrade/platform.sh b/target/linux/brcm47xx/base-files/lib/upgrade/platform.sh
index 8c09706..f5b9bda 100644 (file)
--- a/target/linux/brcm47xx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/brcm47xx/base-files/lib/upgrade/platform.sh
@@ -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")
                ;;