add cfgresetusb uboot script

Makefile

@@ -89,7 +89,7 @@ endef
 all: kernel-axe-modules kernel
 
 .PHONY: release
-release: kernel-axe-modules out/idl4k.scr out/idl4k.cfgreset out/idl4k.recovery
+release: kernel-axe-modules out/idl4k.scr out/idl4k.cfgreset out/idl4k.cfgresetusb out/idl4k.recovery
 	-ls -la out
 
 .PHONY: dist
@@ -151,6 +151,11 @@ out/idl4k.cfgreset: patches/uboot-cfgreset.script
 	  -n 'Reset satip-axe fw configuration' \
 	  -d patches/uboot-cfgreset.script out/idl4k.cfgreset
 
+out/idl4k.cfgresetusb: patches/uboot-cfgresetusb.script
+	$(TOOLPATH)/mkimage -T script -C none \
+	  -n 'Reset satip-axe fw configuration (USB)' \
+	  -d patches/uboot-cfgresetusb.script out/idl4k.cfgresetusb
+
 out/idl4k.recovery: patches/uboot-recovery.script
 	$(TOOLPATH)/mkimage -T script -C none \
 	  -n 'Restore original idl4k fw' \

dist/README

@@ -102,7 +102,10 @@ Misc:
 Recovery from the wrong configuration:
 
   - it works with firmware build 10 and later
+  - for flashed firmware:
     - copy idl4k.cfgreset file as idl4k.scr file to the root directory on the USB stick
+  - for firmare on the USB stick:
+    - copy idl4k.cfgresetusb file as idl4k.scr file to the root directory on the USB stick
   - plug the USB stick to the upper USB port in box
   - turn on the box
   - the old configuration file is moved to /etc/sysconfig/config.old

patches/uboot-cfgresetusb.script

@@ -0,0 +1,3 @@
+fatload usb 0 $load_addr satip-axe-@VERSION@.fw
+set bootargs console=ttyAS0,115200 bigphysarea=20000 axecfg=reset
+bootm $load_addr