[U-Boot] [PATCH v8 24/31] imx: Add u-boot-with-nand-spl.imx make target

[Benoît Thébaudeau]

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 at advansee.com>
---
Changes in v8:
 - Change the dummy 1024-byte header into a true FCB in order to add support for
   i.MX53.
 - Use CONFIG_SPL_PAD_TO instead of CONFIG_SPL_MAX_SIZE for padding, which
   allows to pad the SPL after adding the i.MX header and the FCB, which may
   save time when the boot ROM loads the SPL.
 - Add /u-boot-with-nand-spl.imx to .gitignore.

Changes in v7:
 - New patch.

Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

 .gitignore                   |    1 +
 Makefile                     |    5 +++++
 arch/arm/imx-common/Makefile |   11 +++++++++++
 3 files changed, 17 insertions(+)

diff --git a/.gitignore b/.gitignore
index 1d07fec..c991631 100644
--- a/.gitignore
+++ b/.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
diff --git a/Makefile b/Makefile
index 38f2ca5..0069c86 100644
--- a/Makefile
+++ b/Makefile
@@ -488,6 +488,10 @@ $(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
@@ -860,6 +864,7 @@ 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
diff --git a/arch/arm/imx-common/Makefile b/arch/arm/imx-common/Makefile
index 2ce182d..d54dbee 100644
--- a/arch/arm/imx-common/Makefile
+++ b/arch/arm/imx-common/Makefile
@@ -60,6 +60,17 @@ $(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
+
 
 #########################################################################
 
-- 
1.7.10.4