mb/protectli/vault_cml: Add Comet Lake 6 port board support

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: If1b4f9c8245a082ff875ae9c6102a1c45e677d0b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67940
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Krystian Hebel <krystian.hebel@3mdeb.com>

Documentation/mainboard/index.md

@@ -168,6 +168,7 @@ The boards in this section are not real mainboards, but emulators.
 
 - [FW2B / FW4B](protectli/fw2b_fw4b.md)
 - [FW6A / FW6B / FW6C](protectli/fw6.md)
+- [VP4630 / VP4650 / VP4670](protectli/vp46xx.md)
 
 ## Roda
 

Documentation/mainboard/protectli/vp46xx.md

@@ -0,0 +1,135 @@
+# Protectli Vault VP46xx series
+
+This page describes how to run coreboot on the [Protectli VP46xx].
+
+![](vp46xx_front.jpg)
+![](vp46xx_back.jpg)
+
+## Required proprietary blobs
+
+To build a minimal working coreboot image some blobs are required (assuming
+only the BIOS region is being modified).
+
+```eval_rst
++-----------------+---------------------------------+---------------------+
+| Binary file     | Apply                           | Required / Optional |
++=================+=================================+=====================+
+| FSP-M, FSP-S    | Intel Firmware Support Package  | Required            |
++-----------------+---------------------------------+---------------------+
+| microcode       | CPU microcode                   | Required            |
++-----------------+---------------------------------+---------------------+
+```
+
+FSP-M and FSP-S are obtained after splitting the Comet Lake FSP binary (done
+automatically by the coreboot build system and included into the image) from
+the `3rdparty/fsp` submodule. VP4630 and VP4650 use CometLake2 FSP and VP4670
+use CometLake1 FSP (see [variants](#variants) section), so be sure to select
+the correct board in the coreboot's menuconfig, otherwise the platform will not
+succeed on memory initialization.
+
+Microcode updates are automatically included into the coreboot image by build
+system from the `3rdparty/intel-microcode` submodule.
+
+## Flashing coreboot
+
+### Internal programming
+
+The main SPI flash can be accessed using [flashrom]. The first version
+supporting the chipset is flashrom v1.2. Firmware an be easily flashed
+with internal programmer (either BIOS region or full image).
+
+### External programming
+
+The system has an internal flash chip which is a 16 MiB socketed SOIC-8 chip.
+This chip is located on the top side of the case (the lid side). One has to
+remove 4 top cover screws and lift up the lid. The flash chip is near the M.2
+WiFi slot connector. Remove the chip from socket and use a clip to program the
+chip. Specifically, it's a KH25L12835F (3.3V) which is a clone of Macronix
+MX25L12835F - [datasheet][MX25L12835F].
+
+![](vp46xx_flash.jpg)
+
+## Known issues
+
+- After flashing with external programmer it is always required to reset RTC
+  with a jumper or disconnect the coin cell temporarily. Only then the platform
+  will boot after flashing.
+
+## Working
+
+- USB 3.0 front ports (SeaBIOS, Tianocore UEFIPayload and Linux)
+- 6 Ethernet ports
+- HDMI, DisplayPort and USB-C Display Port with libgfxinit and FSP GOP
+- flashrom
+- M.2 WiFi
+- M.2 4G LTE
+- M.2 SATA and NVMe
+- 2.5'' SATA SSD
+- eMMC
+- Super I/O serial port 0 via front microUSB connector (Fintek F81232 USB to
+  UART adapter present on board)
+- SMBus (reading SPD from DIMMs)
+- Initialization with CometLake FSP 2.0
+- SeaBIOS payload (version rel-1.16.0)
+- TianoCore UEFIPayload
+- LPC TPM module (using Protectli custom-designed module with Infineon SLB9660)
+- Reset switch
+- Booting Debian, Ubuntu, FreeBSD
+
+## Variants
+
+There are 3 variants of VP46xx boards: VP4630, VP4650 and VP4670. They differ
+only in used SoC and some units may come with different Super I/O chips, either
+ITE IT8786E or IT8784E, but the configuration is the same on this platform.
+
+- VP4630:
+
+```eval_rst
++------------------+--------------------------------------------------+
+| CPU              | Intel Core i3-10110U                             |
++------------------+--------------------------------------------------+
+| PCH              | Intel Comet Lake U Premium                       |
++------------------+--------------------------------------------------+
+| Super I/O, EC    | ITE IT8786E/IT8784E                              |
++------------------+--------------------------------------------------+
+| Coprocessor      | Intel Management Engine                          |
++------------------+--------------------------------------------------+
+```
+
+- VP4650:
+
+```eval_rst
++------------------+--------------------------------------------------+
+| CPU              | Intel Core i5-10210U                             |
++------------------+--------------------------------------------------+
+| PCH              | Intel Comet Lake U Premium                       |
++------------------+--------------------------------------------------+
+| Super I/O, EC    | ITE IT8786E/IT8784E                              |
++------------------+--------------------------------------------------+
+| Coprocessor      | Intel Management Engine                          |
++------------------+--------------------------------------------------+
+```
+
+- VP4670:
+
+```eval_rst
++------------------+--------------------------------------------------+
+| CPU              | Intel Core i7-10810U                             |
++------------------+--------------------------------------------------+
+| PCH              | Intel Comet Lake U Premium                       |
++------------------+--------------------------------------------------+
+| Super I/O, EC    | ITE IT8786E/IT8784E                              |
++------------------+--------------------------------------------------+
+| Coprocessor      | Intel Management Engine                          |
++------------------+--------------------------------------------------+
+```
+
+## Useful links
+
+- [VP4600 Hardware Overview](https://protectli.com/kb/vp4600-hardware-overview/)
+- [VP4630 Product Page](https://protectli.com/product/vp4630/)
+- [Protectli TPM module](https://protectli.com/product/tpm-module/)
+
+[Protectli VP46xx]: https://protectli.com/vault-6-port/
+[MX25L12835F]: https://www.mxic.com.tw/Lists/Datasheet/Attachments/8653/MX25L12835F,%203V,%20128Mb,%20v1.6.pdf
+[flashrom]: https://flashrom.org/Flashrom