Odroid n2+ usb broken on reboot

Mon May 12 03:04:21 PDT 2025

Hi Christian,

On Mon, 12 May 2025 at 15:05, Christian Hewitt
<christianshewitt at gmail.com> wrote:
>
> > On 12 May 2025, at 10:59 am, Anand Moon via groups.io <linux.amoon=gmail.com at groups.io> wrote:
> >
> > Hi Wayne,
> >
> > On Sun, 11 May 2025 at 01:51, Wayne Schroeder <raz at chewies.net> wrote:
> >>
> >> Applied patches to 2025.04 release (applied clean).  Made stock
> >> defconfig for odroid n2, built, signed, installed.  The reboot issue
> >> remains and usb ports are unavailable to linux kernel after reboot.
> >>
> >> It is worth noting that linux does see some enumeration of devices
> >> after a while, but even if it logs to the console about device
> >> attachment, the devices don't actually function.  This was the same
> >> behavior with the release version.
> >>
> > Thanks for testing these patches.
> > We need to modify the boot order to probe USB before MMC
>
> Why? Most Amlogic boards boot from an mmc device (SD or internal flash
> storage) not USB. It smells like a workaround not a fix, and I wonder
> what the performance impact on boot will be?
>
I'm providing a solution that may not apply to all Amlogic boards.
The goal is to ensure the USB device binds early, allowing the USB keyboard
and mass storage device to be detected promptly.
However, I'm unsure if booting from USB mass storage is supported.

Thanks
-Anand
> Christian
>
> > diff --git a/include/configs/meson64.h b/include/configs/meson64.h
> > index f3275b37a51..3ace59880bd 100644
> > --- a/include/configs/meson64.h
> > +++ b/include/configs/meson64.h
> > @@ -119,8 +119,8 @@
> > #define BOOT_TARGET_DEVICES(func) \
> >        func(ROMUSB, romusb, na)  \
> >        func(USB_DFU, usbdfu, na)  \
> > -       BOOT_TARGET_MMC(func) \
> >        BOOT_TARGET_DEVICES_USB(func) \
> > +       BOOT_TARGET_MMC(func) \
> >        BOOT_TARGET_NVME(func) \
> >        BOOT_TARGET_SCSI(func) \
> >        BOOT_TARGET_PXE(func) \
> >
> > Here is the boot sequence at my end.
> > ------------------------
> > U-Boot 2025.07-rc1-00223-g704a4d1fd804 (May 12 2025 - 12:15:29 +0530)
> > odroid-n2/n2-plus
> >
> > Model: Hardkernel ODROID-N2
> > SoC:   Amlogic Meson G12B (S922X) Revision 29:c (40:2)
> > DRAM:  1 GiB (total 3.8 GiB)
> > Core:  402 devices, 30 uclasses, devicetree: separate
> > MMC:   mmc at ffe05000: 0, mmc at ffe07000: 1
> > Loading Environment from nowhere... OK
> > In:    usbkbd,serial
> > Out:   vidconsole,serial
> > Err:   vidconsole,serial
> > Board variant: n2-plus
> > Net:   eth0: ethernet at ff3f0000
> >
> > Hit any key to stop autoboot:  0
> > starting USB...
> > Register 3000140 NbrPorts 3
> > Starting the controller
> > USB XHCI 1.10
> > Bus usb at ff500000: 4 USB Device(s) found
> >       scanning usb for storage devices... 1 Storage Device(s) found
> >
> > Device 0: Vendor: ASMT     Rev: 0    Prod: 2115
> >            Type: Hard Disk
> >            Capacity: 114473.4 MB = 111.7 GB (234441648 x 512)
> > ... is now current device
> > Scanning usb 0:1...
> > Card did not respond to voltage select! : -110
> > Cannot persist EFI variables without system partition
> > Loading Boot0000 'mmc 1' failed
> > Loading Boot0001 'usb 0' failed
> > EFI boot manager: Cannot load any image
> > Card did not respond to voltage select! : -110
> > switch to partitions #0, OK
> > mmc1(part 0) is current device
> > Scanning mmc 1:1...
> > Found /extlinux/extlinux.conf
> > Retrieving file: /extlinux/extlinux.conf
> > 1:      Manjaro ARM
> > Retrieving file: /Image
> > Retrieving file: /initramfs-linux.img
> > append: initrd=/initramfs-linux.img console=ttyAML0,115200n8
> > root=PARTUUID=0efc7c36-02 rootwait audit=0 clk_ignore_unused
> > plymouth.ignore-serial-consoles
> >
> >> Wayne
> >>
> >> On Fri, May 9, 2025 at 10:01 AM Wayne Schroeder <raz at chewies.net> wrote:
> >>>
> >>> Yes.  Will report back how it works on the n2+.
> >>>
> >>>
> >>> On Fri, May 9, 2025 at 2:08 AM Anand Moon <linux.amoon at gmail.com> wrote:
> >>>>
> >>>> Hi Wayne,
> >>>>
> >>>> On Fri, 9 May 2025 at 01:25, Wayne Schroeder <raz at chewies.net> wrote:
> >>>>>
> >>>>> I actually already have a working solution that I documented in my
> >>>>> github repo (dubschro/odroid-n2).  All I do is set BOOTCOMMAND to
> >>>>> check/delete a flag file on my boot partition and if it is found, then
> >>>>> reset usb and sleep for 10 seconds.  I then have a systemd shutdown
> >>>>> script only on reboot to touch that file.
> >>>>>
> >>>>> CONFIG_BOOTCOMMAND="fatrm mmc 0:1 reboot && echo Resetting USB on
> >>>>> reboot... && usb reset && sleep 10; run distro_bootcmd"
> >>>>>
> >>>>> It is a hack, but... the system reliably reboots remotely now, and
> >>>>> that's the important part for now.
> >>>>>
> >>>>> Wayne
> > I did not modify this at my end. However, this is not required with
> > the above fix.
> >
> > Thanks
> > -Anand
> >>>>>
> >>>>> On Thu, May 8, 2025 at 11:22 AM Ferass El Hafidi
> >>>>> <funderscore at postmarketos.org> wrote:
> >>>>>>
> >>>>>> On Wed May 7, 2025 at 1:03 PM UTC, Wayne Schroeder wrote:
> >>>>>>> It's hard for me to quantify if usb works in u-boot as I'm not loading
> >>>>>>> off of any usb storage devices.  It certainly never lets me use the
> >>>>>>> keyboard to abort auto boot, and never has.  On reboot, to reliably
> >>>>>>
> >>>>>> You can send bytes via UART to abort boot, if you happen to have a UART
> >>>>>> adapter around.
> >>>>>
> >>>> Can you test this series to see if this resolves the issue?
> >>>>
> >>>> https://patchwork.ozlabs.org/project/uboot/list/?series=456088
> >>>>
> >>>> Thanks
> >>>> -Anand
> >>>>
> >>>>> _______________________________________________
> >>>>> linux-amlogic mailing list
> >>>>> linux-amlogic at lists.infradead.org
> >>>>> http://lists.infradead.org/mailman/listinfo/linux-amlogic
> >
> >
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