A20-SOM204 reset in u-boot

[Oleg Strelkov]

Hi Olimex!

I began to use A20-SOM204-EVB under Armbian_5.46_Olimex-som204-a20_Debian_jessie_default_3.4.113.img
according to recommenations in: https://www.olimex.com/wiki/ArmbianHowTo

I wrote image into eMMC of A20-SOM204-1Ge16Gs16M-MC module.
Linux works fine from eMMC.

But I found strange behavior of U-boot bootloader.
When I interrupt booting and then send reset command,
board goes to reset and not responding.

It looks like this:
U-Boot 2017.11-armbian (Jun 05 2018 - 13:49:34 +0300) Allwinner Technology

CPU:   Allwinner A20 (SUN7I)
Model: Olimex A20-SOM204-EVB-eMMC
I2C:   ready
DRAM:  1 GiB
MMC:   SUNXI SD/MMC: 0, SUNXI SD/MMC: 1
In:    serial
Out:   serial
Err:   serial
Allwinner mUSB OTG (Peripheral)
SCSI:  SATA link 0 timeout.
AHCI 0001.0100 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: ncq stag pm led clo only pmp pio slum part ccc apst
Net:   eth0: ethernet@01c50000
Warning: usb_ether MAC addresses don't match:
Address in ROM is          de:ad:be:ef:00:01
Address in environment is  12:0d:0a:c1:be:60
, eth1: usb_ether
Autoboot in 3 seconds, press <Space> to stop
=>
=> reset
resetting ...

Did you meet the problem?

[JohnS]

Sounds like it's something in uboot so
1. try the current version(s)
2. if all are the same, report to uboot devs

John

[Oleg Strelkov]

Hi John,

Thank you for respond.

I tested last version of U-boot from Armbian.
Moreover, I found now that this u-boot version works from uSD (mmc) normally (reset command works).
But when u-boot is written in eMMC, then reset command isn't work.

It's look like u-boot bug.
Has anyone else encountered such a bug?

Oleg.