Documentation/mainboard/opencellular/rotundu.md

   1 # Rutundu
   2
   3 This page describes how to run coreboot on the [Rotundu] compute board
   4 from [OpenCellular].
   5
   6 ## TODO
   7
   8 * Configure UART
   9 * EC interface
  10
  11 ## Flashing coreboot
  12
  13 ```eval_rst
  14 +---------------------+------------+
  15 | Type                | Value      |
  16 +=====================+============+
  17 | Socketed flash      | no         |
  18 +---------------------+------------+
  19 | Model               | W25Q128    |
  20 +---------------------+------------+
  21 | Size                | 16 MiB     |
  22 +---------------------+------------+
  23 | In circuit flashing | yes        |
  24 +---------------------+------------+
  25 | Package             | SOIC-8     |
  26 +---------------------+------------+
  27 | Write protection    | No         |
  28 +---------------------+------------+
  29 | Dual BIOS feature   | No         |
  30 +---------------------+------------+
  31 | Internal flashing   | yes        |
  32 +---------------------+------------+
  33 ```
  34
  35 ### Internal programming
  36
  37 The SPI flash can be accessed using [flashrom].
  38
  39 ### External programming
  40
  41 The GBCv1 board does have a pinheader to flash the SOIC-8 in circuit.
  42 Directly connecting a Pomona test-clip on the flash is also possible.
  43
  44 **Closeup view of SOIC-8 flash IC**
  45
  46 ![][rotundu_flash]
  47
  48 [rotundu_flash]: rotundu_flash.jpg
  49
  50 **SPI header**
  51
  52 ![][rotundu_header2]
  53
  54 [rotundu_header2]: rotundu_header2.jpg
  55
  56 **SPI header pinout**
  57
  58 Dediprog compatible pinout.
  59
  60 ![][rotundu_j16]
  61
  62 [rotundu_j16]: rotundu_j16.png
  63
  64 ## Technology
  65
  66 ```eval_rst
  67 +------------------+--------------------------------------------------+
  68 | SoC              | Intel Baytrail                                   |
  69 +------------------+--------------------------------------------------+
  70 | Coprocessor      | Intel ME                                         |
  71 +------------------+--------------------------------------------------+
  72 ```
  73
  74 [Rotundu]: https://github.com/Telecominfraproject/OpenCellular
  75 [OpenCellular]: https://code.fb.com/connectivity/introducing-opencellular-an-open-source-wireless-access-platform/
  76 [flashrom]: https://flashrom.org/Flashrom