No compatible devices detected on Raspberry Pi 3 B+ on NetBSD 9.1

[rockyhotas]

Hello!
I have a Raspberry Pi 3 B+ running NetBSD 9.1. I cloned this repository and, following the steps we defined on a previous issue, I ran gmake. It exited normally, creating the executable uhubctl. However, if I run as root

# ./uhubctl

no compatible devices are detected. Raspberry Pi 3 B+ should have them, instead.
What could it be the problem?

[mvp]

Can you please show output of uhubctl -f?

[rockyhotas]

The same as without options:

# ./uhubctl
No compatible devices detected!
Run with -h to get usage info.
# ./uhubctl -f
No compatible devices detected!
Run with -h to get usage info.

If it can be useful:

# ./uhubctl -v
2.3.0-6-gf76dc986

[mvp]

uhubctl -f should list all hubs, whether they support power switching or not.
Is there lsusb equivalent in NetBSD? Can it list what you expect?
This could be libusb issue on NetBSD. Which libusb version you have installed? 1.0.22or later is recommended.
I would recommend debugging it by adding printf() in usb_find_hubs(), somewhere around here:

uhubctl/uhubctl.c

Line 701 in f76dc98

rc = libusb_get_device_descriptor(dev, &desc);

It could be bailing on bad return code from get_hub_info():

uhubctl/uhubctl.c

Line 707 in f76dc98

rc = get_hub_info(dev, &info);

[rockyhotas]

uhubctl -f should list all hubs, whether they support power switching or not.
Is there lsusb equivalent in NetBSD? Can it list what you expect?

There's no lsusb or similar AFAIK, but the dmesg should provide all the information:

[     2.081312] dwctwo0: Core Release: 2.80a (snpsid=4f54280a)
[     2.081312] usb0 at dwctwo0: USB revision 2.0
...
[     2.101183] uhub0 at usb0: NetBSD (0000) DWC2 root hub (0000), class
9/0, rev 2.00/1.00, addr 1
[     2.111182] uhub0: 1 port with 1 removable, self powered
...
[     3.963921] uhub1 at uhub0 port 1: vendor 0424 (0x424) product 2514 (0x2514), class 9/0, rev 2.00/b.b3, addr 2
[     3.973922] uhub1: multiple transaction translators
[     3.983924] uhub1: 4 ports with 3 removable, self powered
[     5.284044] uhub2 at uhub1 port 1: vendor 0424 (0x424) product 2514 (0x2514), class 9/0, rev 2.00/b.b3, addr 3
[     5.294046] uhub2: multiple transaction translators
[     5.304048] uhub2: 3 ports with 2 removable, self powered
[     5.634091] uhub0: autoconfiguration error: illegal enable change, port 1
...
[     7.054290] mue0 at uhub2 port 1

uhub1 and uhub2 should be respectively the "Main hub" and "secondary hub" of your description. mue0 is the Ethernet card, in port 1 as expected.

Maybe this error is the reason for this issue?

uhub0: autoconfiguration error: illegal enable change, port 1

If I connect a mouse and a keyboard to these USB ports they work.

This could be libusb issue on NetBSD. Which libusb version you have installed? 1.0.22or later is recommended.

It's 1.0.24.

I would recommend debugging it by adding printf() in usb_find_hubs(), somewhere around here:

uhubctl/uhubctl.c

Line 701 in f76dc98

rc = libusb_get_device_descriptor(dev, &desc);

Ok, thanks for the position. I tried:

        rc = libusb_get_device_descriptor(dev, &desc);
        /* only scan for hubs: */
        printf("Scanning for hubs...\n");

But nothing changes in the output:

# ./uhubctl
No compatible devices detected!
Run with -h to get usage info.
# ./uhubctl -f
No compatible devices detected!
Run with -h to get usage info.

I am not familiar with the source. If there's anything else that I should print, let me know.

[mvp]

The only way for this to happen if this call to libusb_get_device_list() returns success, but
usb_devs contains empty list. Perhaps something is wrong with libusb on NetBSD?

uhubctl/uhubctl.c

Line 996 in f76dc98

rc = libusb_get_device_list(NULL, &usb_devs);

You can try to validate if listdevs from libusb examples is working:

git clone https://github.com/libusb/libusb
cd libusb
# build libusb
./autogen.sh
./configure
make
# build examples
cd examples
make
# run simple libusb utilities
./listdevs
./testlibusb

If listdevs shows nothing, there is nothing uhubctl can do to fix.

[rockyhotas]

If listdevs shows nothing, there is nothing uhubctl can do to fix.

Thank you so much for the very detailed steps. I followed all of them, and nor listdevs, neither testlibusb give an output. They all complete successfully, but with no results. From the root prompt:

# ./listdevs
# echo $?
0
# ./testlibusb
# echo $?
0

So, maybe it's as you guessed, there is a problem with libusb on NetBSD in this case.

[mvp]

@rockyhotas, I recommend filing issue with libusb https://github.com/libusb/libusb/issues/new - refer to details you did above in new ticket.
I will close this one as there is nothing I can do to fix it :-(

[rockyhotas]

Ok! Of course, I understand. Thanks for all your help!