Elgon

This page describes how to run coreboot on the Elgon compute board from OpenCellular.

TODO

• Add hard reset control

Flashing coreboot

+---------------------+------------+
| Type                | Value      |
+=====================+============+
| Socketed flash      | no         |
+---------------------+------------+
| Model               | W25Q128    |
+---------------------+------------+
| Size                | 16 MiB     |
+---------------------+------------+
| In circuit flashing | yes        |
+---------------------+------------+
| Package             | SOIC-8     |
+---------------------+------------+
| Write protection    | No         |
+---------------------+------------+
| Dual BIOS feature   | No         |
+---------------------+------------+
| Internal flashing   | yes        |
+---------------------+------------+

Internal programming

The SPI flash can be accessed using flashrom.

External programming

The EVT board does have a pinheader to flash the SOIC-8 in circuit. Directly connecting a Pomona test-clip on the flash is also possible.

Total board view of EVT

Closeup view of SOIC-8 flash IC and USB serial connector of EVT (marked blue)

SPI header (marked blue)

SPI header pinout

Dediprog compatible pinout.

Technology

+---------------+----------------------------------------+
| SoC           | :doc:`../../soc/cavium/cn81xx/index`   |
+---------------+----------------------------------------+
| CPU           | Cavium ARMv8-Quadcore `CN81XX`_        |
+---------------+----------------------------------------+

.. _CN81XX: https://www.cavium.com/product-octeon-tx-cn80xx-81xx.html