x220 Platforms

Introduction

The x220 has is a range of L2+ switches using the Marvell AlleyCat3 switch with integrated ARMv7 CPU. It is also sold under some different brands for different markets.

• x220-52GP

• x220-52GT

• x220-28GS

• GS980M/52PS

• GS980M/52

• x230-52

DDR Traning (binhdr)

The AlleyCat3 uses a binary blob for it’s DDR training. This is launched by the built-in bootloader prior to U-Boot starting.

To generate binary.0 from Marvell’s bin_hdr.elf use the following command

arm-softfloat-linux-gnueabi-objcopy -S -O binary bin_hdr.elf \
   board/alliedtelesis/x220/binary.0

Alternatively, it is possible to extract the binary.0 from an existing U-Boot image

./tools/dumpimage -T kwbimage -p 1 -o board/alliedtelesis/x220/binary.0 u-boot.kwb