[U-Boot] How to update Espressobin (U-Boot) firmware?

[André Przywara]

On 19/07/17 18:01, Andre Przywara wrote:

Hi Andreas,

> On 19/07/17 17:58, Andreas Färber wrote:
>> Hi,
>>
>> Am 19.07.2017 um 18:50 schrieb Andre Przywara:
>>> On 19/07/17 17:37, Kostya Porotchkin wrote:
>>>> I probably have to build and try the SATA image as the next step.
>>>
>>> Yeah, that was my plan for tonight as well, since this would allow me to
>>> experiment safely with the generated image.
>>>
>>> Oh, BTW: Chain-loading mainline U-Boot worked quite nicely and I could
>>> launch the generic debian-testing installer via EFI boot. The only issue
>>> was that I was using the U-Boot DT directly, which isn't enough for the
>>> kernel (missing clocks and interrupts). I will try to send some patches
>>> to bring the U-Boot DT in sync with the kernel one. If this is in place,
>>> one could simply attach some (UEFI enabled) USB pen drive and it should
>>> start without further ado (given a newer U-Boot in the SPI flash with
>>> EFI support).
>>
>> Which devices have you successfully enumerated on mainline U-Boot? Does
>> SATA work for you? I had reported an endless reset on another board. USB
>> was not quite working either last time I tried on the other board -
>> either the initial scan or a reset had similar symptoms to SATA.
> 
> I was using USB (2.0), that worked with origin/master. I haven't tested
> SATA yet, but will try tonight and let you know.

Quick update:
Indeed SATA does not work with mainline U-Boot, I see it probing, but it
apparently runs into a timeout. Also MMC (SD card) didn't work for me, I
think there was no device detected at all. USB works.
This was with chainloading U-Boot, so it might as well be a problem with
those devices not being turned off properly and/or the mainline init
code not being able to cope with all corner cases (like already
initialized devices).

All of MMC, USB and SATA work with the Marvell U-Boot version on the SPI
flash.

Unfortunately I can't do further tests or debugging at the moment
(although the build process now seems to work correctly), as I managed
to snap off the microUSB socket from my board (while pushing apparently
too hard to the SATA cable), so I lost console access and couldn't
recover yet. I didn't have success with a 1.8V serial adapter connected
to those UART pins on the JTAG header. I will try later to solder a TX
and RX wire to the PL2303 chip's pins directly (where I can measure 1.8V
in contrast to those JTAG header pins) - but only after my holidays ;-)

Cheers,
Andre.