Re: imx-usb-loader on imx8mq/mm

["Yazdani, Reyhaneh" <RYazdani@data-modul.com>]

Thanks Lucas.

So, if I have a board which has only eMMC (no SD card). What would be your
recommendation about programming it with Barebox?

Currently, I program U-Boot via uuu utility and then from Kernel, I program
Barebox on boot1 partition of eMMC (boot0 is not possible).

I am trying at least to program Barebox in U-boot via ums, mmc write , ... but
until now I am not successful. Do you have any experience or idea?

(I had forgotten to reply-all and Barebox mailing list was not on my previous
Email, so I send the Email again)

Best,
Reyhaneh


On 12/12/19 11:24 AM, Lucas Stach wrote:
> Hi Reyhaneh,
>
> On Do, 2019-12-12 at 10:13 +0000, Yazdani, Reyhaneh wrote:
>> Hello everyone,
>>
>> I am trying to load Barebox to the imx8mm board via imx-usb-loader, but it stops
>> in the middle. I think maybe it is because we do not have a flash-header file
>> with the static RAM configuration. Does someone have any idea about that?
>
> Currently it's impossible to load Barebox on the i.MX8M via the imx-
> usb-loader. The basic issue is that the DRAM setup happens in the PBL,
> so there is no way to play the DCD and load a complete Barebox image
> into DRAM like we do on the older SoCs.
>
> For boards that do the DRAM setup in the PBL we would need to implement
> a 2 step loading approach in imx-usb-loader:
> First load the PBL part (max_load_size in the flash-header) into SRAM,
> execute the DRAM setup, then have a implementation of the imx serial
> load USB protocol in the PBL, so imx-usb-loader can load the complete
> image into DRAM.
>
> There's quite a bit of implementation work to be done here, but it
> would be a very welcome addition to Barebox.
>
> Regards,
> Lucas
>

--
Reyhaneh Yazdani
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