Commit 4dd4b9ac authored by Jörg Krause's avatar Jörg Krause Committed by Thomas Petazzoni
Browse files

boot/uboot: add support for i.MX28 NAND format 

Allow to generate 'u-boot.nand', Freescale i.MX28 BootStream format (.sb)
with a header for booting from NAND flash.

There are two possibilities when preparing an image writable to NAND flash:
1) The NAND was not written at all yet or the BCB (Boot Control Blocks) is
   broken. In this case, the NAND image 'u-boot.nand' needs to written.
2) The NAND flash was already written with a good BCB. This applies after
   'u-boot.nand' was correctly written. There is no need to write the BCB
   again. In this case, the bootloader can be upgraded by writing 'u-boot.sb'.

To satisfy both cases 'u-boot.nand' as well as the make target 'u-boot.sb' are
copied to the binaries directory.

mxsboot for NAND images needs all three parameters typed in as integer values
(hex values do not work). The default values choosen are typical sizes for a
NAND flash.

For more information see:
http://www.denx-cs.de/doku/?q=m28evkrunuboot

Commit Note: This patch is based on top of
"[PATCH v2 1/2] boot/uboot: add support for i.MX28 SD format"
http://patchwork.ozlabs.org/patch/453116/



Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
parent 49f9efc4

boot/uboot/Config.in

+57 −0
Original line number Diff line number Diff line
@@ -142,6 +142,63 @@ config BR2_TARGET_UBOOT_FORMAT_SD 


	  See doc/README.mxs (or doc/README.mx28_common before 2013.07)



config BR2_TARGET_UBOOT_FORMAT_NAND

	depends on BR2_arm

	bool "u-boot.nand"

	help

	  This is Freescale i.MX28 BootStream format (.sb), with a header

	  for booting from a NAND flash.



	  U-boot includes an mxsboot tool to generate this format,

	  starting from 2011.12.



	  There are two possibilities when preparing an image writable to

	  NAND flash:

	  1) The NAND was not written at all yet or the BCB (Boot Control

	  Blocks) is broken. In this case, the NAND image 'u-boot.nand'

	  needs to written.

	  2) The NAND flash was already written with a good BCB. This

	  applies after 'u-boot.nand' was correctly written. There is no

	  need to write the BCB again. In this case, the bootloader can be

	  upgraded by writing 'u-boot.sb'.



	  To satisfy both cases, the 'u-boot.nand' image obtained from

	  mxsboot as well as the U-Boot make target 'u-boot.sb' are copied

	  to the binaries directory.



	  See doc/README.mxs (or doc/README.mx28_common before 2013.07)



if BR2_TARGET_UBOOT_FORMAT_NAND



config BR2_TARGET_UBOOT_FORMAT_NAND_PAGE_SIZE

	int "NAND page size"

	default 2048

	help

	  The NAND page size of the targets NAND flash in bytes as a

	  decimal integer value.



	  The value provided here is passed to the -w option of mxsboot.



config BR2_TARGET_UBOOT_FORMAT_NAND_OOB_SIZE

	int "NAND OOB size"

	default 64

	help

	  The NAND OOB size of the targets NAND flash in bytes as a

	  decimal integer value.



	  The value provided here is passed to the -o option of mxsboot.



config BR2_TARGET_UBOOT_FORMAT_NAND_ERASE_SIZE

	int "NAND erase size"

	default 131072

	help

	  The NAND eraseblock size of the targets NAND flash in bytes as

	  a decimal integer value.



	  The value provided here is passed to the -e option of mxsboot.



endif



config BR2_TARGET_UBOOT_FORMAT_CUSTOM

	bool "Custom (specify below)"

	help

boot/uboot/uboot.mk

+12 −0
Original line number Diff line number Diff line
@@ -58,6 +58,10 @@ else ifeq ($(BR2_TARGET_UBOOT_FORMAT_SD),y) 
UBOOT_BIN = u-boot.sd

UBOOT_MAKE_TARGET = u-boot.sb

UBOOT_DEPENDENCIES += host-elftosb

else ifeq ($(BR2_TARGET_UBOOT_FORMAT_NAND),y)

UBOOT_BIN = u-boot.nand

UBOOT_MAKE_TARGET = u-boot.sb

UBOOT_DEPENDENCIES += host-elftosb

else ifeq ($(BR2_TARGET_UBOOT_FORMAT_CUSTOM),y)

UBOOT_BIN = $(call qstrip,$(BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME))

else
@@ -133,6 +137,12 @@ define UBOOT_BUILD_CMDS 
		$(UBOOT_MAKE_TARGET)

	$(if $(BR2_TARGET_UBOOT_FORMAT_SD),

		$(@D)/tools/mxsboot sd $(@D)/u-boot.sb $(@D)/u-boot.sd)

	$(if $(BR2_TARGET_UBOOT_FORMAT_NAND),

		$(@D)/tools/mxsboot \

			-w $(BR2_TARGET_UBOOT_FORMAT_NAND_PAGE_SIZE)	\

			-o $(BR2_TARGET_UBOOT_FORMAT_NAND_OOB_SIZE)	\

			-e $(BR2_TARGET_UBOOT_FORMAT_NAND_ERASE_SIZE)	\

			nand $(@D)/u-boot.sb $(@D)/u-boot.nand)

endef



define UBOOT_BUILD_OMAP_IFT
@@ -142,6 +152,8 @@ endef 


define UBOOT_INSTALL_IMAGES_CMDS

	cp -dpf $(@D)/$(UBOOT_BIN) $(BINARIES_DIR)/

	$(if $(BR2_TARGET_UBOOT_FORMAT_NAND),

		cp -dpf $(@D)/$(UBOOT_MAKE_TARGET) $(BINARIES_DIR))

	$(if $(BR2_TARGET_UBOOT_SPL),

		cp -dpf $(@D)/$(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME)) $(BINARIES_DIR)/)

	$(if $(BR2_TARGET_UBOOT_ENVIMAGE),