On Jul 01 15:07:48, a...@caoua.org wrote:
> On Sun, Jun 30, 2024 at 08:26:06AM +0200, Jan Stary wrote:
> > This is current/amd64 on a PC (full dmesg below).
> > I got my hands on an M-Audio Fast Track Ultra 8R,
> > an USB audio interface; eight tracks, 24/96, nice.
> >
> > It doesn't seem to be supported though:
> > it attaches as an ugen, but no uaudio.
> >
> > umidi0 at uhub4 port 2 configuration 1 interface 3 "M-Audio Fast Track
> > Ultra 8R" rev 2.00/1.51 addr 3
> > umidi0: (genuine USB-MIDI)
> > umidi0: out=1, in=1
> > midi0 at umidi0: <USB MIDI I/F>
> > ugen0 at uhub4 port 2 configuration 1 "M-Audio Fast Track Ultra 8R" rev
> > 2.00/1.51 addr 3
> >
> > This happens in any USB slot.
> >
> > What can I do to debug this?
> > Is anyone using this on OpenBSD?
> >
> > It is an USB-compliant audio device,
> > macOS and Windows use it just fine.
>
> It seems that the uaudio driver doesn't even try to attach. You could
> instrument the uaudio_match() kernel function, and try to figure out
> why it returns UMATCH_NONE for your device.
With UAUDIO_DEBUG in GENERIC and the following diff to uaudio.c
(see below, just some DPRINTFs), the device attaches (not) as follows:
uaudio_match: iface or device NULL
serial (null), vendor M-Audio, product Fast Track Ultra 8R
uaudio_match: not an audio device
serial (null), vendor M-Audio, product Fast Track Ultra 8R
uaudio_match: not an audio device
serial (null), vendor M-Audio, product Fast Track Ultra 8R
uaudio_match: not an audio device
serial (null), vendor M-Audio, product Fast Track Ultra 8R
uaudio_match: not an audio device
umidi0 at uhub4 port 2 configuration 1 interface 3 "M-Audio Fast Track Ultra
8R" rev 2.00/1.51 addr 3
umidi0: (genuine USB-MIDI)
umidi0: out=1, in=1
midi0 at umidi0: <USB MIDI I/F>
serial (null), vendor M-Audio, product Fast Track Ultra 8R
uaudio_match: not an audio device
uaudio_match: iface or device NULL
ugen0 at uhub4 port 2 configuration 1 "M-Audio Fast Track Ultra 8R" rev
2.00/1.51 addr 3
I suspect it doesn't even report itself as an audio device
(see the FreeBSD dmessages in this thread), so uaudio_match()
gives up in (idesc->bInterfaceClass != UICLASS_AUDIO)
at the lastest. But I don't really know how usb devices
attach, and why it would even get to uaudio.c then.
I will ask the FreeBSD audio people - perhaps they
have a quirk for this specific device ("treat as
an uaudio anyway, we know this is a soundcard").
At any rate, thanks for the hint.
Jan
Index: sys/dev/usb//uaudio.c
===================================================================
RCS file: /cvs/src/sys/dev/usb/uaudio.c,v
diff -u -p -r1.178 uaudio.c
--- sys/dev/usb//uaudio.c 7 Jan 2025 12:49:40 -0000 1.178
+++ sys/dev/usb//uaudio.c 4 Feb 2025 20:39:14 -0000
@@ -3834,8 +3834,15 @@ uaudio_match(struct device *parent, void
struct usb_attach_arg *arg = aux;
struct usb_interface_descriptor *idesc;
- if (arg->iface == NULL || arg->device == NULL)
+ if (arg->iface == NULL || arg->device == NULL) {
+ DPRINTF("%s: iface or device NULL\n", __func__);
return UMATCH_NONE;
+ }
+
+ DPRINTF("serial %s, vendor %s, product %s\n",
+ arg->device->serial,
+ arg->device->vendor,
+ arg->device->product);
idesc = usbd_get_interface_descriptor(arg->iface);
if (idesc == NULL) {
@@ -3844,8 +3851,10 @@ uaudio_match(struct device *parent, void
}
if (idesc->bInterfaceClass != UICLASS_AUDIO ||
- idesc->bInterfaceSubClass != UISUBCLASS_AUDIOSTREAM)
+ idesc->bInterfaceSubClass != UISUBCLASS_AUDIOSTREAM) {
+ DPRINTF("%s: not an audio device\n", __func__);
return UMATCH_NONE;
+ }
return UMATCH_VENDOR_PRODUCT_CONF_IFACE;
}
