Maxim Polyakov 0fcd37172f mb/kontron: Add Kontron mAL10 COMe module support

This patch adds support for the Kontron mAL10 COMe module with the
Apollo Lake SoC together with Kontron T10-TNI carrierboard.

Working:
  - UART console and I2C on Kontron kempld;
  - USB2/3
  - Ethernet controller
  - eMMC
  - SATA
  - PCIe ports
  - IGD/DP
  - SMBus
  - HWM

Not tested:
  - IGD/LVDS
  - SDIO

TODO:
  - HDA (codec IDT 92HD73C1X5, currently disabled)

Tested payloads:
  - SeaBIOS
  - Tianocore, UEFIPayload - without video, EFI-shell in console only

Tested on COMe module with Intel Atom x5-E3940 processor (4 Core,
1.6/1.8GHz, 9.5W TDP). Xubuntu 18.04.2 was used as a bootable OS
(5.0.0-32-generic linux kernel)

Change-Id: Ib8432e10396f77eb05a71af1ccaaa4437a2e43ea
Signed-off-by: Maxim Polyakov <max.senia.poliak@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39133
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

2020-11-22 22:18:22 +00:00

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Kontron mAL10 Computer-on-Modules platform

The Kontron mAL10 COMe is a credit card sized Computer-on-Modules platform based on the Intel Atom E3900 Series, Pentium and Celeron processors.

Technology

+------------------+----------------------------------+
| COMe Type        | mini pin-out type 10             |
+------------------+----------------------------------+
| SoC              | Intel Atom x5-E3940 (4 core)     |
+------------------+----------------------------------+
| GPU              | Intel HD Graphics 500            |
+------------------+----------------------------------+
| Coprocessor      | Intel TXE 3.0                    |
+------------------+----------------------------------+
| RAM              | 8GB DDR3L                        |
+------------------+----------------------------------+
| eMMC Flash       | 32GB eMMC pSLC                   |
+------------------+----------------------------------+
| USB3             | x2                               |
+------------------+----------------------------------+
| USB2             | x6                               |
+------------------+----------------------------------+
| SATA             | x2                               |
+------------------+----------------------------------+
| LAN              | Intel I210IT, I211AT             |
+------------------+----------------------------------+
| Super IO/EC      | Kontron CPLD/EC                  |
+------------------+----------------------------------+
| HWM              | NCT7802                          |
+------------------+----------------------------------+

Building coreboot

The following commands will build a working image:

make distclean
make defconfig KBUILD_DEFCONFIG=configs/config.kontron_mal10
make

Payloads

SeaBIOS
Tianocore
Linux as payload

Flashing coreboot

The SPI flash can be accessed internally using flashrom. The following command is used to flash BIOS region.

$ flashrom -p internal --ifd -i bios -w coreboot.rom --noverify-all

Hardware Monitor

The Nuvoton NCT7802Y is a hardware monitoring IC, capable of monitor critical system parameters including power supply voltages, fan speeds, and temperatures. The remote inputs can be connected to CPU/GPU thermal diode or any thermal diode sensors and thermistor.

6 temperature sensors;
5 voltage sensors;
3 fan speed sensors;
4 sets of temperature setting points.

PECI is not supported by Apollo Lake Pentium/Celeron/Atom processors and the CPU temperature value is taken from a thermal resistor (NTC) that is placed very close to the CPU.

Known issues

Works only with Tianocore "UEFIPayload" payload edk2-stable201903-1569-g3e63a91 Booting with the "CorebootPayload" crashes.
Tianocore outputs video through an external GPU only.

Untested

IGD/LVDS
SDIO

Tested and working

Kontron CPLD/EC (Serial ports, I2C port)
NCT7802 [HWM](#Hardware Monitor)
USB2/3
Gigabit Ethernet ports
eMMC
SATA
PCIe ports
IGD/DP

TODO

Onboard audio (codec IDT 92HD73C1X5, currently disabled)
S3 suspend/resume

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