mb/asus/p8x7x-series: Add P8C WS as a variant of P8X7X series

Mainboard information can be found in the included documentation.

Signed-off-by: Bill XIE <persmule@hardenedlinux.org>
Change-Id: Idb696193e5a67c42adf45e54d455d2dff7681ca7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55850
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

Documentation/mainboard/asus/p8c_ws.md

@@ -0,0 +1,94 @@
+# ASUS P8C WS
+
+This page describes how to run coreboot on the [ASUS P8H77-V].
+
+## Flashing coreboot
+
+```eval_rst
++---------------------+----------------+
+| Type                | Value          |
++=====================+================+
+| Socketed flash      | yes            |
++---------------------+----------------+
+| Model               | W25Q64FVA1Q    |
++---------------------+----------------+
+| Size                | 8 MiB          |
++---------------------+----------------+
+| Package             | DIP-8          |
++---------------------+----------------+
+| Write protection    | no             |
++---------------------+----------------+
+| Dual BIOS feature   | no             |
++---------------------+----------------+
+| Internal flashing   | yes            |
++---------------------+----------------+
+```
+
+The flash IC is located beside the SATA ports (circled):
+![](p8c_ws.jpg)
+
+### How to flash
+
+Unlike ordinary desktop boards, the BIOS version 3202 of ASUS P8C WS does not
+apply any write protection, so the main SPI flash can be accessed using
+[flashrom], and the whole flash is writable.
+
+The following command may be used to flash coreboot. (To do so, linux kernel
+should be started with `iomem=relaxed`)
+
+```
+# flashrom -p internal -w coreboot.rom
+```
+
+The flash chip is a socketed DIP-8 SPI flash, so it's also easy to remove and
+flash externally.
+
+## Working
+- Intel Xeon E3-1225 V2 with 4 M391B1G73BH0-YK0 UDIMMs, ECC confirmed active
+- PS/2 keyboard with SeaBIOS 1.14.0 and Debian GNU/Linux with kernel 5.10.40
+- Both Onboard NIC
+- S3 Suspend to RAM
+- USB2 on rear and front panel connectors
+- USB3
+- Integrated SATA
+- CPU Temp sensors (tested PSensor on GNU/Linux)
+- LPC TPM on TPM-header (tested tpm-tools with TPM 1.2 Infineon SLB9635TT12)
+- Native raminit
+- Integrated graphics with libgfxinit (both analog and digital output from DVI-I)
+- Nvidia Quadro 600 in all PCIe-16x slots
+- Compex WLM200NX (Qualcomm Atheros AR9220) in PCI slot
+- Onboard IEEE1394 controller under PCI bus
+- Debug output from serial port
+
+## Untested
+
+- EHCI debugging
+- S/PDIF audio
+- PS/2 mouse
+- LPT port
+
+## Technology
+
+```eval_rst
++------------------+--------------------------------------------------+
+| Northbridge      | :doc:`../../northbridge/intel/sandybridge/index` |
++------------------+--------------------------------------------------+
+| Southbridge      | bd82x6x                                          |
++------------------+--------------------------------------------------+
+| CPU              | model_206ax                                      |
++------------------+--------------------------------------------------+
+| Super I/O        | Nuvoton NCT6776F                                 |
++------------------+--------------------------------------------------+
+| EC               | None                                             |
++------------------+--------------------------------------------------+
+| Coprocessor      | Intel Management Engine                          |
++------------------+--------------------------------------------------+
+```
+
+## Extra resources
+
+- [Flash chip datasheet][W25Q64FVA1Q]
+
+[ASUS P8C WS]: https://www.asus.com/supportonly/p8c_ws/helpdesk_knowledge/
+[W25Q64FVA1Q]: https://www.winbond.com/resource-files/w25q64fv%20revs%2007182017.pdf
+[flashrom]: https://flashrom.org/Flashrom

Documentation/mainboard/index.md

@@ -19,6 +19,7 @@ This section contains documentation about coreboot on specific mainboards.
 - [A88XM-E](asus/a88xm-e.md)
 - [F2A85-M](asus/f2a85-m.md)
 - [P5Q](asus/p5q.md)
+- [P8C WS](asus/p8c_ws.md)
 - [P8H61-M LX](asus/p8h61-m_lx.md)
 - [P8H61-M Pro](asus/p8h61-m_pro.md)
 - [P8H77-V](asus/p8h77-v.md)