No USB on Waveshare CM4-IO-BASE-A

[Raphael]

Hello,
I’ve tested all images I could find, but I never got the usb-ports of the waveshare board to work with my cm3.
I did put the dto line in uEnv.txt or extlinux.conf (depending on what image I used). I also debugged the boot with my uart adapter and was able to see that uboot loaded the pi-cm4 dto while booting to linux.
I’ve tryed another board, but there was no usb, too.

lsusb shows the usb-controllers, but no device connected, despite me trying several devices on different usb-ports.

Did I miss something ?
How can I make usb work, because without USB the cm3 is just an expensive brick laying around.

[setq]

Hello, please refer to here

CM3 + CM4-IO-BASE-B(Waveshare)

I think that USB is not working because input 101 (USB_OTG0_ID) is not connected anywhere. Is it possible to programmatically connect it to the GND?

Try the following command

sudo su
echo host > /sys/devices/platform/fe8a0000.usb2-phy/otg_mode

[balaton]

It has no effect.

[gregoinc]

I have a Waveshare CM4-IO-BASE-B and have been unable to get the CM3 to work at all.

Could I please trouble you to provide the steps you took to get the CM3 to work in the CM4-IO-BASE-A, and which model of the CM3 you were using.

I have a theory… the CM3 without emmc doesn’t work in the CM4-IO-BASE-B, but want to gather more data before I am sure my theory is correct.

Much appreciated.