i.MX8M Mini Hangs at ATF when booting from USB

[Michael Nazzareno Trimarchi]

Hi

On Mon, Jan 31, 2022 at 9:34 PM Adam Ford <aford173 at gmail.com> wrote:
>
> On Mon, Jan 31, 2022 at 2:25 PM Michael Nazzareno Trimarchi
> <michael at amarulasolutions.com> wrote:
> >
> > HI Adam
> >
> > On Mon, Jan 31, 2022 at 9:21 PM Adam Ford <aford173 at gmail.com> wrote:
> > >
> > > I have a situation where the same Flash.bin file can boot an MMC card,
> > > but hang when booting over USB.
> > >
> > > In both cases, I can see the FIT file is loaded, and the various items
> > > are identified and placed in their respective folders memory
> > > locations.  The only difference I can see is that when jumping to
> > > 0x920000 (ATF), the USB booting hangs and ATF doesn't appear to
> > > execute.  Is there some special command that I need to issue to unlock
> > > this memory to execute from it when booting from USB?  I am calling
> > > enable_tzc380 from SPL, and I read the first 100 bytes and last 100
> > > bytes and compared it to my bl31.bin file, and it appears to match, so
> > > I know I can read from it.
> > >
> > > U-Boot SPL 2022.01-00836-g3cc200c91a-dirty (Jan 30 2022 - 07:31:51 -0600)
> > > No pmic
> > > WDT:   Not starting watchdog at 30280000
> > > Trying to boot from USB SDP
> > > USB EHCI 1.00
> > > SDP: initialize...
> > > SDP: handle requests...
> > > Downloading file of size 832080 to 0x40400000... done
> > > Jumping to header at 0x40400000
> > > Header Tag is not an IMX image
> > > Found header at 0x40417c00
> > > firmware: 'uboot'
> > > External data: dst=40200000, offset=3000, size=9ddd8
> > > fdt: 'fdt-1'
> > > External data: dst=4029de00, offset=aaea0, size=87b0
> > > loadables: 'atf'
> > > External data: dst=920000, offset=a0dd8, size=a0c6
> > > image entry point: 0x920000
> > >
> >
> > Check if the uart used on atf and uboot are mapping correctly (but
> > this should because you can boot from sdcard)
>
> As far as i can tell, I have not done any differently in the serial
> from the NXP downstream.
>
> > ENV_IS_EVERYWHERE in configs file. It's no PMIC a problem when you jump in atf?
>
> I have experimented with and without ENV_IS_EVERYWHERE, but that only
> seemed to help my imx8m Nano when jumping from ATF -> U-Boot.  As for
> my Mini, the jump from SPL->ATF seems to be the issue.
>
> What might the PMIC have to do with the ATF?  From what I can tell,
> the PMIC is pre-configured and the default voltages appear to boot the

I have only seen this. I don't say that is connected. If the voltage
are ok and you don't need
to program it I don't see the problem

> MMC.  i had to disable the PMIC driver in order to make room for the
> USB code.  I have a few lines of code in my board's spl.c file to
> setup a few registers based on NXP's original 8MM design and reference
> software.

Can you enable debug on the atf side?

Are you using binman to create the image flash.bin?

Michael

>
> adam
> >
> > Michael
> >
> > > <hang>
> >
> >
> >
> > --
> > Michael Nazzareno Trimarchi
> > Co-Founder & Chief Executive Officer
> > M. +39 347 913 2170
> > michael at amarulasolutions.com
> > __________________________________
> >
> > Amarula Solutions BV
> > Joop Geesinkweg 125, 1114 AB, Amsterdam, NL
> > T. +31 (0)85 111 9172
> > info at amarulasolutions.com
> > www.amarulasolutions.com



-- 
Michael Nazzareno Trimarchi
Co-Founder & Chief Executive Officer
M. +39 347 913 2170
michael at amarulasolutions.com
__________________________________

Amarula Solutions BV
Joop Geesinkweg 125, 1114 AB, Amsterdam, NL
T. +31 (0)85 111 9172
info at amarulasolutions.com
www.amarulasolutions.com