[Macchiato] SD problems

[Steve McIntyre]

On Wed, Jun 14, 2017 at 09:49:10PM +0200, Marcin Wojtas wrote:
>
>
>2017-06-14 20:19 GMT+02:00 Ard Biesheuvel <ard.biesheuvel at linaro.org>:
>
>    On 14 June 2017 at 20:09, Marcin Wojtas <mw at semihalf.com> wrote:
>    > Hi Steve,
>    >
>    > I tried two different SD cards, both worked, so maybe I was lucky.
>    Anyway,
>    > are you sure, you have MBR partition table + the first (boot) partition
>    > starts at 4096?
>    >
>
>    I can confirm it is a board level issue: I had the pleasure of playing
>    with Steve's board as well as my own, and as he reported, one of my
>    working SDs also worked on his board. My experience is not as bad, but
>    out of my sizable collection, only two uSD cards are accepted by the
>    bootrom.
>
>Who knows, maybe it's somehow related to unstable SD card operation in UEFI?
>7040/8040-DB do not have such problems with this interface (and same cards).
>
>Anyway, please boot via UART, following this instruction:
>https://wiki.solid-run.com/doku.php?id=
>products:a8040:software:development:u-boot_atf
>We found it today, and it really eases the whole process. I'll take it to main
>McBin wiki.

Aha! That's exactly what I was looking for, thanks!

>Please let know if it worked for you.

I've successfully built and loaded an ATF/u-boot combo over UART just
now. The instructions could do with a little fleshing out / fixing up
(I had a few issues along the way), but I've got there.

Now I can ignore SD for a while - yay!

-- 
Steve McIntyre, Cambridge, UK.                                steve at einval.com
"I suspect most samba developers are already technically insane... Of
 course, since many of them are Australians, you can't tell." -- Linus Torvalds