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-rw-r--r--Documentation/mainboard/index.md1
-rw-r--r--Documentation/mainboard/opencellular/rotundu.md76
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diff --git a/Documentation/mainboard/index.md b/Documentation/mainboard/index.md
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+++ b/Documentation/mainboard/index.md
@@ -44,6 +44,7 @@ The boards in this section are not real mainboards, but emulators.
## Open Cellular
- [Elgon](opencellular/elgon.md)
+- [Rotundu](opencellular/rotundu.md)
## HP
diff --git a/Documentation/mainboard/opencellular/rotundu.md b/Documentation/mainboard/opencellular/rotundu.md
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+# Rutundu
+
+This page describes how to run coreboot on the [Rotundu] compute board
+from [OpenCellular].
+
+## TODO
+
+* Configure UART
+* EC interface
+
+## Flashing coreboot
+
+```eval_rst
++---------------------+------------+
+| 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**
+
+![][rotundu_flash]
+
+[rotundu_flash]: rotundu_flash.jpg
+
+**SPI header**
+
+![][rotundu_header2]
+
+[rotundu_header2]: rotundu_header2.jpg
+
+**SPI header pinout**
+
+Dediprog compatible pinout.
+
+![][rotundu_j16]
+
+[rotundu_j16]: rotundu_j16.png
+
+## Technology
+
+```eval_rst
++------------------+--------------------------------------------------+
+| SoC | Intel Baytrail |
++------------------+--------------------------------------------------+
+| Coprocessor | Intel ME |
++------------------+--------------------------------------------------+
+```
+
+[Rotundu]: https://github.com/Telecominfraproject/OpenCellular
+[OpenCellular]: https://code.fb.com/connectivity/introducing-opencellular-an-open-source-wireless-access-platform/
+[flashrom]: https://flashrom.org/Flashrom
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