Hartmut Geissbauer wrote:
> I own a piece of hardware called Noah EX. It's a "tactive
> instrument modeller".
> My goal is to get this device working with the alsa usb driver,
> because the output of lsusb -v leads me to the hope, that it has a
> standard usb audio interface.
> ...
> Interface Descriptor:
> bInterfaceClass 1 Audio
> bInterfaceSubClass 1 Control Device
> ...
> bInterfaceSubClass 2 Streaming (= PCM)
> ...
> bInterfaceSubClass 3 Non Streaming (= MIDI)
Well, this device indeed has standard descriptors.
> What I discoverd yet, is that the device is offering two
> configurations. And the second is the audio and midi related one.
> The first seems to be the configuration "channel".
> Feb 5 00:28:33 chief kernel: usb 1-2.4: configuration #1 chosen from 2 choices
The problem is that the kernel automatically selects the first
configuration. Please try the patch below.
HTH
Clemens
--
Index: alsa-kernel/usb/usbquirks.h
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/usb/usbquirks.h,v
retrieving revision 1.27
diff -u -r1.27 usbquirks.h
--- alsa-kernel/usb/usbquirks.h 11 Feb 2004 12:15:55 -0000 1.27
+++ alsa-kernel/usb/usbquirks.h 12 Feb 2004 10:56:21 -0000
@@ -698,4 +698,13 @@
}
},
+{
+ USB_DEVICE_VENDOR_SPEC(0x1107, 0x0102),
+ .driver_info = (unsigned long) & (const snd_usb_audio_quirk_t) {
+ .vendor_name = "CreamWare",
+ .product_name = "Noah",
+ .ifnum = QUIRK_NO_INTERFACE
+ }
+},
+
#undef USB_DEVICE_VENDOR_SPEC
Index: alsa-kernel/usb/usbaudio.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/usb/usbaudio.c,v
retrieving revision 1.79
diff -u -r1.79 usbaudio.c
--- alsa-kernel/usb/usbaudio.c 9 Feb 2004 16:25:38 -0000 1.79
+++ alsa-kernel/usb/usbaudio.c 12 Feb 2004 10:56:21 -0000
@@ -2820,6 +2820,14 @@
goto __err_val;
config = dev->actconfig;
}
+ /* Creamware Noah needs to be set to the second configuration */
+ if (dev->descriptor.idVendor == 0x1107 && dev->descriptor.idProduct == 0x0102
&&
+ ifnum == 0) {
+ if (get_cfg_desc(dev->actconfig)->bConfigurationValue == 1)
+ usb_set_configuration(dev, 2);
+ /* but don't actually claim interface 0 */
+ goto __err_val;
+ }
/*
* found a config. now register to ALSA
-------------------------------------------------------
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