i.MX8M Mini Hangs at ATF when booting from USB

[Adam Ford]

On Mon, Jan 31, 2022 at 2:48 PM Adam Ford <aford173 at gmail.com> wrote:
>
> On Mon, Jan 31, 2022 at 2:45 PM Michael Nazzareno Trimarchi
> <michael at amarulasolutions.com> wrote:
> >
> > 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?
>
> I can try that.

+ CC Tim Harvey
+ CC Frieder

After working with Tim, he sent me some patches that he was testing
with a combination of work himself and Frieder, I was able to get USB
booting with non-DM USB in SPL.  For now I think I prefer the non-DM
version since SPL is so tight, I needed to strip out some stuff (like
the PMIC) which I'd like to keep.

Thanks for the suggestions.  Hopefully between the three of us, we can
get something ready to push upstream.

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