Please test U-Boot Allwinner F1C100s support

[Giulio Benetti]

Hi Andre,

On 31/01/22 14:57, Andre Przywara wrote:
> On Mon, 31 Jan 2022 14:07:54 +0100
> Giulio Benetti <giulio.benetti at benettiengineering.com> wrote:
> 
> Hi Giulio,
> 
>>> Il giorno 31 gen 2022, alle ore 13:57, Andre Przywara <andre.przywara at foss.arm.com> ha scritto:
>>>
>>> On Mon, 31 Jan 2022 13:17:52 +0100
>>> Giulio Benetti <giulio.benetti at benettiengineering.com> wrote:
>>>    
>>>> Hi All,
>>>>
>>>> I've tried several times on both F1C100s and F1C200s, maybe I'm doing
>>>> something wrong but it doesn't work :-/
>>>>
>>>> I burn sd-card with:
>>>> # sudo dd if=u-boot-sunxi-with-spl.bin of=/dev/sdb bs=1k seek=8
>>>>
>>>> I've triple-checked that the file has been written there by dumping the
>>>> sd-card and I see it's written at 0x2000, so 8K offset, like the mangoPI
>>>> image for example. But no uart output.
>>>
>>> I haven't looked in detail what would be needed for the SPL part of the
>>> MMC driver to really work, I just checked that the base addresses are
>>> correct, the pinmux looked alright as well.
>>> The DT nodes are not needed for the SPL, and I don't see other changes
>>> related to MMC in the original series?
>>
>> Yes that’s true.
>>
>>> Do you see UART output from the SPL, or nothing at all?
>>
>> Unfortunately nothing either with SPL
> 
> That is interesting. If there would be a problem with the MMC code, you
> should at least see the SPL banner, and then see it failing loading U-Boot
> proper. 

Yes

> I take it FEL boot works? 

Yes, it does work on both F1C100s and 200s boards :-/

> Maybe we miss something with the clock
> setup that the BROM does for us during FEL operation?

Yes, it sounds like that, it's a classic

> Can you try to clear the area between the end of the SPL and the beginning
> of the U-Boot proper image (dd if=/dev/zero of=/dev/sdX bs=1k seek=32
> count=8)?

I've zeroed the first 32MB of sd-card now, so we're sure nothing can 
interfere.

# sudo dd if=/dev/zero of=/dev/sda bs=1M count=32
# sync
# sudo dd if=u-boot-sunxi-with-spl.bin of=/dev/sda bs=1k seek=8
# sync

(/dev/sda is my sd-card for real since I have m.2 ssd)

> Does any other branch work with SD card booting? Can you check the SPL
> size in there (with hexdump -C u-boot-sunxi-with-spl.bin | head, check for
> the halfword at 0x10)?

This is the result of the command:
```
00000000  16 00 00 ea 65 47 4f 4e  2e 42 54 30 64 04 71 7c 
|....eGON.BT0d.q||
00000010  00 60 00 00 53 50 4c 02  00 00 00 00 00 00 00 00 
|.`..SPL.........|
00000020  2c 00 00 00 00 00 00 00  00 00 00 00 73 75 6e 69 
|,...........suni|
00000030  76 2d 66 31 63 31 30 30  73 2d 6c 69 63 68 65 65 
|v-f1c100s-lichee|
00000040  70 69 2d 6e 61 6e 6f 00  00 00 00 00 00 00 00 00 
|pi-nano.........|
00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 
|................|
00000060  0f 00 00 ea 14 f0 9f e5  14 f0 9f e5 14 f0 9f e5 
|................|
00000070  14 f0 9f e5 14 f0 9f e5  14 f0 9f e5 14 f0 9f e5 
|................|
00000080  a0 00 00 00 a0 00 00 00  a0 00 00 00 a0 00 00 00 
|................|
00000090  a0 00 00 00 a0 00 00 00  a0 00 00 00 ef be ad de 
|................|
```

>>> And you are not using UART0 on the PortF pins, so multiplexed with the
>>> MMC, I guess?
>>
>> I use PE0 and PE1 Uart0 according to dts.
>>
>> Have you got such board to test it?
> 
> That's the problem: I am driving blindfolded, because I don't have
> hardware :-(

Yeah, but I've read you've ordered it! :-)

Jesse has it working so maybe he can check how clocks are setup after 
BROM using u-boot itself. I've never understood why Allwinner/Rockchip 
place jtag on the sd-card pins. I really hate it, it would take so few 
with free jtag pins to check this :-/

Ciao :-)
-- 
Giulio Benetti
Benetti Engineering sas

> Cheers,
> Andre
> 
>> Or we can wait for Jesse or George.
>>
>> I’ve used the git you’ve pointed.
>>
>> Anyway I think we’re very close to have it working.
>>
>> At least my work “behind the scenes” will be worth, right Jesse :-)?
>>
>> Best regards
>> —-
>> Giulio Benetti
>> Benetti Engineering sas
>>
>>>
>>> Cheers,
>>> Andre
>>>
>>>
>>>    
>>>>
>>>> Am I doing something wrong?
>>>>
>>>> Best regards
>>>    
>>
>>
>