mb/asus/p8h61-m_pro: Add small fixes

* Add VBT
* Configure OnBoard NIC
* Add documentation

Change-Id: Iad739b4e1dacb41f5f63247150951df7013bbf0c
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32890
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

3 files changed, 104 insertions, 0 deletions

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diff --git a/Documentation/mainboard/asus/p8h61-m_pro.md b/Documentation/mainboard/asus/p8h61-m_pro.md
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+# ASUS P8H61-M Pro
+
+This page describes how to run coreboot on the [ASUS P8H61-M Pro].
+
+## Flashing coreboot
+
+```eval_rst
++---------------------+------------+
+| Type                | Value      |
++=====================+============+
+| Socketed flash      | yes        |
++---------------------+------------+
+| Model               | W25Q32BV   |
++---------------------+------------+
+| Size                | 4 MiB      |
++---------------------+------------+
+| Package             | DIP-8      |
++---------------------+------------+
+| Write protection    | no         |
++---------------------+------------+
+| Dual BIOS feature   | no         |
++---------------------+------------+
+| Internal flashing   | yes        |
++---------------------+------------+
+```
+
+The flash IC is located right next to one of the SATA ports:
+![](p8h61-m_pro.jpg)
+
+### Internal programming
+
+The main SPI flash can be accessed using [flashrom]. By default, only
+the BIOS region of the flash is writable. If you wish to change any
+other region (Management Engine or flash descriptor), then an external
+programmer is required.
+
+The following command may be used to flash coreboot:
+
+```
+$ sudo flashrom --noverify-all --ifd -i bios -p internal -w coreboot.rom
+```
+
+The use of `--noverify-all` is required since the Management Engine
+region is not readable even by the host.
+
+## Known issues
+
+- There is no automatic, OS-independent fan control. This is because
+  the super I/O hardware monitor can only obtain valid CPU temperature
+  readings from the PECI agent, whose complete initialisation is not
+  publicly documented. The `coretemp` driver can still be used for
+  accurate CPU temperature readings.
+
+- me_cleaner breaks LPC bus and attached components!
+- PS/2 mouse doesn't work
+
+## Untested
+
+- parallel port
+- EHCI debug
+- S/PDIF audio
+
+## Working
+
+- PS/2 keyboard
+- PCIe graphics
+- USB
+- Gigabit Ethernet
+- Integrated graphics
+- SATA
+- Serial port
+- hardware monitor (see [Known issues](#known-issues) for caveats)
+- front panel audio
+- Native raminit (2 x 2GB, DDR3-1333)
+- Native graphics init (libgfxinit)
+- Wake-on-LAN
+- TPM on TPM-header
+
+## Technology
+
+```eval_rst
++------------------+--------------------------------------------------+
+| Northbridge      | :doc:`../../northbridge/intel/sandybridge/index` |
++------------------+--------------------------------------------------+
+| Southbridge      | bd82x6x                                          |
++------------------+--------------------------------------------------+
+| CPU              | model_206ax                                      |
++------------------+--------------------------------------------------+
+| Super I/O        | Nuvoton NCT6776                                  |
++------------------+--------------------------------------------------+
+| EC               | None                                             |
++------------------+--------------------------------------------------+
+| Coprocessor      | Intel Management Engine                          |
++------------------+--------------------------------------------------+
+```
+
+## Extra resources
+
+- [Flash chip datasheet][W25Q32BV]
+
+[ASUS P8H61-M Pro]: https://www.asus.com/Motherboards/P8H61M_Pro/
+[W25Q32BV]: https://www.winbond.com/resource-files/w25q32bv_revi_100413_wo_automotive.pdf
+[flashrom]: https://flashrom.org/Flashrom
diff --git a/Documentation/mainboard/index.md b/Documentation/mainboard/index.md
index eced74966e..1494e06244 100644
--- a/Documentation/mainboard/index.md
+++ b/Documentation/mainboard/index.md
@@ -6,6 +6,7 @@ This section contains documentation about coreboot on specific mainboards.
 
 - [F2A85-M](asus/f2a85-m.md)
 - [P8H61-M LX](asus/p8h61-m_lx.md)
+- [P8H61-M Pro](asus/p8h61-m_pro.md)
 
 ## ASRock