imx: Add u-boot-with-nand-spl.imx make target

This image combines the SPL with the i.MX header, the FCB and U-Boot.

For i.MX25/35/51, the FCB is ignored by the boot ROM, so this image is just
useful because it can be programmed on a NAND Flash page boundary.

For i.MX53, the FCB is required by the boot ROM.

This does not support i.MX6 so far because its FCB is more complicated.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>

.gitignore

@@ -31,6 +31,7 @@
 /u-boot.hex
 /u-boot.imx
 /u-boot-with-spl.imx
+/u-boot-with-nand-spl.imx
 /u-boot.map
 /u-boot.srec
 /u-boot.ldr

Makefile

@@ -490,6 +490,10 @@ $(obj)u-boot-with-spl.imx: $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
 		$(MAKE) -C $(SRCTREE)/arch/arm/imx-common \
 			$(OBJTREE)/u-boot-with-spl.imx
 
+$(obj)u-boot-with-nand-spl.imx: $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
+		$(MAKE) -C $(SRCTREE)/arch/arm/imx-common \
+			$(OBJTREE)/u-boot-with-nand-spl.imx
+
 $(obj)u-boot.ubl:       $(obj)u-boot-with-spl.bin
 		$(obj)tools/mkimage -n $(UBL_CONFIG) -T ublimage \
 		-e $(CONFIG_SYS_TEXT_BASE) -d $< $(obj)u-boot.ubl
@@ -855,6 +859,7 @@ clobber:	tidy
 	@rm -f $(obj)u-boot.pbl
 	@rm -f $(obj)u-boot.imx
 	@rm -f $(obj)u-boot-with-spl.imx
+	@rm -f $(obj)u-boot-with-nand-spl.imx
 	@rm -f $(obj)u-boot.ubl
 	@rm -f $(obj)u-boot.ais
 	@rm -f $(obj)u-boot.dtb

arch/arm/imx-common/Makefile

@@ -61,6 +61,17 @@ $(OBJTREE)/u-boot-with-spl.imx: $(OBJTREE)/SPL $(OBJTREE)/u-boot.bin
 	cat $(OBJTREE)/spl/u-boot-spl-pad.imx $(OBJTREE)/u-boot.bin > $@
 	rm $(OBJTREE)/spl/u-boot-spl-pad.imx
 
+$(OBJTREE)/u-boot-with-nand-spl.imx: $(OBJTREE)/SPL $(OBJTREE)/u-boot.bin
+	(echo -ne '\x00\x00\x00\x00\x46\x43\x42\x20\x01' && \
+			dd bs=1015 count=1 if=/dev/zero 2>/dev/null) | \
+		cat - $< > $(OBJTREE)/spl/u-boot-nand-spl.imx
+	$(OBJCOPY) ${OBJCFLAGS} --pad-to=$(CONFIG_SPL_PAD_TO) \
+		-I binary -O binary $(OBJTREE)/spl/u-boot-nand-spl.imx \
+		$(OBJTREE)/spl/u-boot-nand-spl-pad.imx
+	rm $(OBJTREE)/spl/u-boot-nand-spl.imx
+	cat $(OBJTREE)/spl/u-boot-nand-spl-pad.imx $(OBJTREE)/u-boot.bin > $@
+	rm $(OBJTREE)/spl/u-boot-nand-spl-pad.imx
+
 
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