BananaPi CM4: Add force USB host mode capability

[sgofferj]

The BananaPi CM4 doesn't play well with a number of third party base boards in that often, USB does not work on them. Usually, that is because the third party base board designer connected the USB hub IC to an SOC OTG port without connecting a line to switch the OTG port into host mode. The problem was demonstrated at least with the Waveshare CM4 Base Board B and the MCUZone POE baseboard. In the Banana Pi forums, Sinovoip engineer "August" posted a DTBO for Ubuntu 20.04 which solves the issue by forcing host mode. Below is the DTBO decompiled to DTS.

I would like to request that this overlay be updated for the Armbian kernel and included as an optional overlay into the Meson 64 / BananaPi CM4 distribution.

 

dts-v1/;

/ {

        fragment@0 {
                target = <0xffffffff>;

                __overlay__ {
                        controller-type = <0x01>;
                };
        };

        fragment@1 {
                target = <0xffffffff>;

                __overlay__ {
                        otg = <0x00>;
                };
        };

        __fixups__ {
                dwc2_a = "/fragment@0:target:0";
                usb3_phy_v2 = "/fragment@1:target:0";
        };
};

 

[c0rnelius]

Getting this working doesn't appear to be complicated, but I personally don't like playing guessing games. I'll see if I can get the baseboard.

[sgofferj]

I have a Waveshare board on order and an MCUZone POE board in non-production use at the moment. I can test whatever dtbo you can come up with and give feedback.

[c0rnelius]

Give it a whirl and let me know.

 

lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 090c:1000 Silicon Motion, Inc. - Taiwan (formerly Feiya Technology Corp.) Flash Drive
Bus 001 Device 003: ID 0bda:a811 Realtek Semiconductor Corp. RTL8811AU 802.11a/b/g/n/ac WLAN Adapter
Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

 

 

 

meson-g12b-bananapi-cm4-waveshare-usb.dts

[MackJ]

Hi, @c0rnelius I'm trying to figure out if at all possible how to get the Waveshare Hdmi 5.5 AMOLED screen to work on this board. this is the link to the screen https://www.waveshare.com/product/5.5inch-hdmi-amoled.htm

[Igor]

12 hours ago, MackJ said:

this is the link to the screen

This is the link to subscription. Also buy few screens and send to us. Then ask a question again. 

[MackJ]

@Igor i would gladly support this project but was just curios if their was a way for me to add custom timings myself like i can do with the rpi where would be best place to start.

 

 

Edited September 20, 2023 by MackJ

[sgofferj]

@c0rnelius

Thank you!

Unfortunately, I can't get it to work on either the Waveshare or the MCUZone board. It doesn't seem to disturb the function on the bananapi base board, though.

I copied the dts-file and did a sudo armbian-add-overlay meson-g12b-bananapi-cm4-waveshare-usb.dts.

There is a corresponding dtbo now in /boot/overlay-user and a line "user_overlays=meson-g12b-bananapi-cm4-waveshare-usb" in /boot/armbianENV.txt

I tried several flash drives and 2 different keyboards. No device shows up in dmesg or lsusb.

Please let me know if I have missed anything. I'm an experienced Linux user but fairly new to armbian.

 

EDIT:

Never mind, I'm an idiot! I forgot check the boot switch on the Waveshare board. It was set to "on". Set to "off", the Waveshare board works!

The MCUZone board doesn't at first glance. The boot jumper doesn't seem to do anything. I'll do some experimenting but that board is also fairly buggy- The USB hub e.g. is very temperature sensitive.

Edited September 23, 2023 by sgofferj

[c0rnelius]

I did my testing on the CM4-IO-BASE-B. The USB, RTC and PCIe with NVME attached work as expected.

[sgofferj]

@c0rnelius

Apologies, my edit probably overlapped with your reply. It works fine for me with the Waveshare board. I was stupid and missed the boot switch position. Still testing with the MCUZone board, though.