Documentation: Add Asus F2A85-M

Change-Id: I4d195f4833ba71fdc559815cafb0f5d0d254e897
Signed-off-by: Balazs Vinarz <vinibali1@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/30895
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

2 files changed, 199 insertions, 0 deletions

diff --git a/Documentation/mainboard/asus/f2a85-m.md b/Documentation/mainboard/asus/f2a85-m.md
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+# ASUS F2A85-M
+
+This page describes how to run coreboot on the [ASUS F2A85-M].
+
+## Variants
+- ASUS F2A85-M - Working
+- ASUS F2A85-M LE - Working
+- ASUS F2A85-M PRO - Working
+- ASUS F2A85-M2 - Working
+- ASUS F2A85-M/CSM - Unsure if WIP.
+
+## Technology
+
+Both "Trinity" and "Richland" desktop processing units are working,
+the CPU architecture in these CPUs/APUs is [Piledriver],
+and their GPU is [TeraScale 3] (VLIW4-based).
+
+```eval_rst
++------------------+--------------------------------------------------+
+| F2A85-M          |                                                  |
++------------------+--------------------------------------------------+
+| DDR voltage IC   | Nuvoton NCT3933U (AUX SMBUS 0x15)                |
++------------------+--------------------------------------------------+
+| Network          | Realtek RTL8111F                                 |
++------------------+--------------------------------------------------+
+| Northbridge      | Integrated into CPU with IMC and GPU (APUs only) |
++------------------+--------------------------------------------------+
+| Southbridge      | Hudson-D4                                        |
++------------------+--------------------------------------------------+
+| Sound IC         | Realtek ALC887                                   |
++------------------+--------------------------------------------------+
+| Super I/O        | ITE 8603E                                        |
++------------------+--------------------------------------------------+
+| VRM controller   | DIGI VRM ASP1106 (Rebranded RT8894A - SMBUS 0x20)|
++------------------+--------------------------------------------------+
+```
+
+```eval_rst
++------------------+--------------------------------------------------+
+| F2A85-M LE       |                                                  |
++------------------+--------------------------------------------------+
+| DDR voltage IC   | Nuvoton NCT3933U (AUX SMBUS 0x15 - unconfirmed)  |
++------------------+--------------------------------------------------+
+| Network          | Realtek RTL8111F                                 |
++------------------+--------------------------------------------------+
+| Northbridge      | Integrated into CPU with IMC and GPU(APUs only)  |
++------------------+--------------------------------------------------+
+| Southbridge      | Hudson-D4                                        |
++------------------+--------------------------------------------------+
+| Sound IC         | Realtek ALC887                                   |
++------------------+--------------------------------------------------+
+| Super I/O        | ITE 8623E                                        |
++------------------+--------------------------------------------------+
+| VRM controller   | DIGI VRM ASP1106 (Rebranded RT8894A - SMBUS 0x20)|
++------------------+--------------------------------------------------+
+```
+
+```eval_rst
++------------------+--------------------------------------------------+
+| F2A85-M PRO      |                                                  |
++------------------+--------------------------------------------------+
+| DDR voltage IC   | Nuvoton NCT3933U (?)                             |
++------------------+--------------------------------------------------+
+| Network          | Realtek RTL8111F - Not working                   |
++------------------+--------------------------------------------------+
+| Northbridge      | Integrated into CPU with IMC and GPU(APUs only)  |
++------------------+--------------------------------------------------+
+| Southbridge      | Hudson-D4                                        |
++------------------+--------------------------------------------------+
+| Sound IC         | Realtek ALC887                                   |
++------------------+--------------------------------------------------+
+| Super I/O        | Nuvoton NCT6779D                                 |
++------------------+--------------------------------------------------+
+| VRM controller   | DIGI VRM ASP1107                                 |
++------------------+--------------------------------------------------+
+```
+
+## Flashing coreboot
+
+```eval_rst
++---------------------+------------+
+| Type                | Value      |
++=====================+============+
+| Socketed flash      | yes        |
++---------------------+------------+
+| Model               | W25Q64F    |
++---------------------+------------+
+| Size                | 8 MiB      |
++---------------------+------------+
+| Package             | DIP-8      |
++---------------------+------------+
+| Write protection    | no         |
++---------------------+------------+
+| Dual BIOS feature   | no         |
++---------------------+------------+
+| Internal flashing   | yes        |
++---------------------+------------+
+```
+
+### Internal programming
+
+The main SPI flash can be accessed using [flashrom].
+UEFI builds that allow flash chip access:
+> v5016 is untested, but expected to work as well
+> v5018
+> v5103
+> v5104
+> v5107
+> v5202
+> v6002
+> v6004
+> v6102
+> v6402
+> v6404 (requires downgrading to v6402 to flash coreboot)
+> v6501 (requires downgrading to v6402 to flash coreboot)
+> v6502 (requires downgrading to v6402 to flash coreboot)
+
+Build v6502, v6501 and v6404 do not allow access to the flash chip.
+Fortunately it is possible to downgrade build v6502, v6501, v6404 to v6402, with EZFlash.
+Downgrading is done by downloading build v6402 from ASUS' F2A85-M download page
+and copying it to (the root directory of) a FAT32 formatted USB flash drive.
+Enter the EFI setup, switch to advanced mode if necessary,
+open the 'Tool' tab and select "ASUS EZ Flash 2 Utility".
+
+## Integrated graphics
+
+### Option 1: Retrieve the VGA optionrom from the vendor EFI binary by running:
+
+    # dd if=/dev/mem of=vgabios.bin bs=1k count=64 skip=768
+
+### Option 2: Extract from the vendor binary
+
+Download the BIOS from the Support section at [ASUS F2A85-M].
+Using MMTool Aptio (versions 4.5.0 and 5.0.0):
+- Load image, click on 'Extract tab'
+- Select the 'export path' and 'link present' options
+- Choose option ROM '1002,9900' and click on 'Extract'
+
+This version is usable for all the GPUs.
+> 1002,9901 Trinity (Radeon HD 7660D)
+> 1002,9904 Trinity (Radeon HD 7560D)
+> 1002,990c Richland (Radeon HD 8670D)
+> 1002,990e Richland (Radeon HD 8570D)
+> 1002,9991 Trinity (Radeon HD 7540D)
+> 1002,9993 Trinity (Radeon HD 7480D)
+> 1002,9996 Richland (Radeon HD 8470D)
+> 1002,9998 Richland (Radeon HD 8370D)
+> 1002,999d Richland (Radeon HD 8550D)
+
+## Known issues
+
+- buggy USB 3.0 controller (works fine as 2.0 port)
+- reboot, poweroff, S3 suspend/resume (broken since 4.8.1)
+
+## Known issues (untested because of non-working ACPI sleep)
+
+- blink in suspend mode (GP43, program LDN7 F8=23 and blink with F9=2 for 1s blinks)
+- fix immediate resume after suspend (perhaps PCIe STS needs to be cleared)
+- fix resume with USB3.0 used (perhaps there is a bug in resume.c)
+
+## Untested
+
+- audio over HDMI
+- IOMMU
+- PS/2 mouse
+
+## TODOs
+
+- manage to use one ATOMBIOS for all the integrated GPUs
+
+## Working
+
+- ACPI
+- CPU frequency scaling
+- flashrom under coreboot
+- Gigabit Ethernet
+- Hardware monitor
+- Integrated graphics
+- KVM
+- Onboard audio
+- PCIe
+- PS/2 keyboard
+- SATA
+- Serial port
+- SuperIO based fan control
+- USB (XHCI is buggy)
+
+## Extra resources
+
+- [Board manual]
+- Flash chip datasheet [W25Q64FV]
+
+[ASUS F2A85-M]: https://www.asus.com/Motherboards/F2A85M/
+[Board manual]: https://dlcdnets.asus.com/pub/ASUS/mb/SocketFM2/F2A85-M/E8005_F2A85-M.pdf
+[flashrom]: https://flashrom.org/Flashrom
+[Piledriver]: https://en.wikipedia.org/wiki/Piledriver_%28microarchitecture%29#APU_lines
+[TeraScale 3]: https://en.wikipedia.org/wiki/TeraScale_%28microarchitecture%29#TeraScale_3
+[W25Q64FV]: https://www.winbond.com/resource-files/w25q64fv%20revs%2007182017.pdf
diff --git a/Documentation/mainboard/index.md b/Documentation/mainboard/index.md
index d8d3b76fde..56adb25477 100644
--- a/Documentation/mainboard/index.md
+++ b/Documentation/mainboard/index.md
@@ -4,6 +4,7 @@ This section contains documentation about coreboot on specific mainboards.
 
 ## ASUS
 
+- [F2A85-M](asus/f2a85-m.md)
 - [P8H61-M LX](asus/p8h61-m_lx.md)
 
 ## ASRock