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The FW is composed of following images:
• MLO
• u-boot
• dtb
• Kernel
• Backup FS
• Debian FS (the version is written in /etc/issue.owa)
Normally the MLO and u-boot and backup FS should not be updated as
previously specified. In the other hand, the dtb, Kernel and Debian FS should
be flashed together.
The update is possible in any of the two following ways:
( 4
A FW image can be flashed to the NAND of the owa4x from the bootloader, that
previously has been stored in a uSD card.
These are the instructions to flash the MLO, u-boot, DTB, kernel, backup FS
and Debian FS.
• Power up the owa4x and press the space bar to enter the bootloader
prompt
• Insert the uSD card with the images to flash
• Confirm a FAT32 formatted SD card is accessible
mmc rescan
• List the files in the uSD card
fatls mmc 0
• ONLY IF U-BOOT HAS BEEN UPDATED! Check the u-boot version
with command version at the u-boot prompt, and flash the MLO ONLY if
the u-boot version at the dev zone is newer. This step is critical and
could brick the unit, so make sure of inserting the commands correctly.
Read the MLO image, erase the old one from the flash and write the
new one
fatload mmc 0 0x82000000 MLO
nand erase.part NAND.SPL
nand write 0x82000000 NAND.SPL ${filesize}
• ONLY IF U-BOOT HAS BEEN UPDATED! Check the u-boot version
with command version at the u-boot prompt, and flash the u-boot ONLY
if the u-boot version at the dev zone is newer. This step is critical and
could brick the unit, so make sure of inserting the commands correctly.
Read the u-boot image, erase the old one from the flash and write the
new one
fatload mmc 0 0x82000000 u-boot.img
nand erase.part NAND.u-boot
nand write 0x82000000 NAND.u-boot ${filesize}
&.
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