coreboot-kgpe-d16/Documentation/mainboard/opencellular/rotundu.md

Rutundu

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

TODO

• Configure UART
• EC interface

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 GBCv1 board does have a pinheader to flash the SOIC-8 in circuit. Directly connecting a Pomona test-clip on the flash is also possible.

Closeup view of SOIC-8 flash IC

SPI header

SPI header pinout

Dediprog compatible pinout.

Technology

+------------------+--------------------------------------------------+
| SoC              | Intel Baytrail                                   |
+------------------+--------------------------------------------------+
| Coprocessor      | Intel ME                                         |
+------------------+--------------------------------------------------+