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diff --git a/Documentation/mainboard/asus/a88xm-e.md b/Documentation/mainboard/asus/a88xm-e.md new file mode 100644 index 0000000000..77615313e0 --- /dev/null +++ b/Documentation/mainboard/asus/a88xm-e.md @@ -0,0 +1,170 @@ +# ASUS A88XM-E + +This page describes how to run coreboot on the [ASUS A88XM-E]. + +## Technology + +Both "Trinity" and "Richland" FM2 desktop processing units are working, +the CPU architecture in these CPUs/APUs are [Piledriver], +and their GPU is [TeraScale 3] (VLIW4-based). + +Kaveri is non-working at the moment (FM2+), +the CPU architecture in these CPUs/APUs are [Steamroller], +and their GPU is [Sea Islands] (GCN2-based). + +A10 Richland is recommended for the best performance and working IOMMU. + +```eval_rst ++------------------+--------------------------------------------------+ +| A88XM-E | | ++------------------+--------------------------------------------------+ +| DDR voltage IC | Nuvoton 3101S | ++------------------+--------------------------------------------------+ +| Network | Realtek RTL8111G | ++------------------+--------------------------------------------------+ +| Northbridge | Integrated into CPU with IMC and GPU (APUs only) | ++------------------+--------------------------------------------------+ +| Southbridge | Bolton-D4 | ++------------------+--------------------------------------------------+ +| Sound IC | Realtek ALC887 | ++------------------+--------------------------------------------------+ +| Super I/O | ITE IT8603E | ++------------------+--------------------------------------------------+ +| VRM controller | DIGI VRM ASP1206 | ++------------------+--------------------------------------------------+ +``` + +## Flashing coreboot + +```eval_rst ++---------------------+------------+ +| Type | Value | ++=====================+============+ +| Socketed flash | yes | ++---------------------+------------+ +| Model | [GD25Q64] | ++---------------------+------------+ +| Size | 8 MiB | ++---------------------+------------+ +| Package | DIP-8 | ++---------------------+------------+ +| Write protection | yes | ++---------------------+------------+ +| Dual BIOS feature | no | ++---------------------+------------+ +| Internal flashing | yes | ++---------------------+------------+ +``` + +### Internal programming + +The main SPI flash can be accessed using [flashrom], if the +AmdSpiRomProtect modules have been deleted in the factory image previously. + +### External flashing + +Using a PLCC Extractor or any other appropriate tool, carefully remove the +DIP-8 BIOS chip from its' socket while avoiding the bent pins, if possible. +To flash it, use a [flashrom]-supported USB CH341A programmer - preferably with a +green PCB - and double check that it's giving a 3.3V voltage on the socket pins. + +## Integrated graphics + +### Retrieve the VGA optionrom ("Retrieval via Linux kernel" method) + +Make sure a proprietary UEFI is flashed and boot Linux with iomem=relaxed flag. +Some Linux drivers (e.g. radeon for AMD) make option ROMs like the video blob +available to user space via sysfs. To use that to get the blob you need to +enable it first. To that end you need to determine the path within /sys +corresponding to your graphics chip. It looks like this: + + # /sys/devices/pci<domain>:<bus>/<domain>:<bus>:<slot>.<function>/rom. + +You can get the respective information with lspci, for example: + + # lspci -tv + # -[0000:00]-+-00.0 Advanced Micro Devices, Inc. [AMD] Family 16h Processor Root Complex + # +-01.0 Advanced Micro Devices, Inc. [AMD/ATI] Kabini [Radeon HD 8210] + # ... + +Here the the needed bits (for the ROM of the Kabini device) are: + + # PCI domain: (almost always) 0000 + # PCI bus: (also very commonly) 00 + # PCI slot: 01 (logical slot; different from any physical slots) + # PCI function: 0 (a PCI device might have multiple functions... shouldn't matter here) + +To enable reading of the ROM you need to write 1 to the respective file, e.g.: + + # echo 1 > /sys/devices/pci0000:00/0000:00:01.0/rom + +The same file should then contain the video blob and it should be possible to simply copy it, e.g.: + + # cp /sys/devices/pci0000:00/0000:00:01.0/rom vgabios.bin + +romheaders should print reasonable output for this file. + +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) + 1002,130f Kaveri (Radeon R7) + +## Known issues + +- AHCI hot-plug +- S3 resume (sometimes) +- Windows 7 can't boot because of the incomplete ACPI implementation +- XHCI + +### XHCI ports can break after using any of the blobs, restarting the +board with factory image makes it work again as fallback. +Tested even with/without the Bolton and Hudson blobs. + +## Untested + +- audio over HDMI + +## TODOs + +- one ATOMBIOS module for all the integrated GPUs +- manage to work with Kaveri/Godavary (they are using a binaryPI) +- IRQ routing is done incorrect way - common problem of fam15h boards + +## Working + +- ACPI +- CPU frequency scaling +- flashrom under coreboot +- Gigabit Ethernet +- Hardware monitoring +- Integrated graphics +- KVM virtualization +- Onboard audio +- PCI +- PCIe +- PS/2 keyboard mouse (during payload, bootloader) +- SATA +- Serial port +- SuperIO based fan control +- USB (disabling XHCI controller makes to work as fallback USB2.0 ports) +- IOMMU + +## Extra resources + +- [Board manual] + +[ASUS A88XM-E]: https://www.asus.com/Motherboards/A88XME/ +[Board manual]: https://dlcdnets.asus.com/pub/ASUS/mb/SocketFM2/A88XM-E/E9125_A88XM-E.pdf +[flashrom]: https://flashrom.org/Flashrom +[GD25Q64]: http://www.elm-tech.com/ja/products/spi-flash-memory/gd25q64/gd25q64.pdf +[Piledriver]: https://en.wikipedia.org/wiki/Piledriver_%28microarchitecture%29#APU_lines +[Sea Islands]: https://en.wikipedia.org/wiki/Graphics_Core_Next#GCN_2nd_generation +[Steamroller]: https://en.wikipedia.org/wiki/Steamroller_(microarchitecture) +[TeraScale 3]: https://en.wikipedia.org/wiki/TeraScale_%28microarchitecture%29#TeraScale_3 |