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

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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: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Jörg Krause 2015-03-29 18:10:46 +02:00 committed by Thomas Petazzoni
parent 49f9efc4a6
commit 4dd4b9ace5
2 changed files with 69 additions and 0 deletions

57
boot/uboot/Config.in
View File

@ -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

12
boot/uboot/uboot.mk
View File

@ -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),