I botched my previous patch for the UA-5: the altsettings of the audio
interface would be ignored because bInterfaceSubClass isn't set to
USB_SUBCLASS_AUDIO_STREAMING on that device. This patch corrects this.
And some devices (e.g. the Logitech QuickCam Web) have an endpoint
with wMaxPacketSize == 0, and no class-specific descriptors in their
first altsetting (instead of no endpoints). The additional check now
suppresses an unnecessary warning message.
Index: alsa-kernel/usb/usbaudio.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/usb/usbaudio.c,v
retrieving revision 1.56
diff -u -r1.56 usbaudio.c
--- alsa-kernel/usb/usbaudio.c 4 Jun 2003 12:43:55 -0000 1.56
+++ alsa-kernel/usb/usbaudio.c 19 Jun 2003 06:51:04 -0000
@@ -2163,8 +2163,10 @@
/* skip invalid one */
if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
- altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING ||
- altsd->bNumEndpoints < 1)
+ (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
+ altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
+ altsd->bNumEndpoints < 1 ||
+ get_endpoint(alts, 0)->wMaxPacketSize == 0)
continue;
/* must be isochronous */
if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
!=
Index: alsa-kernel/usb/usbaudio.h
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/usb/usbaudio.h,v
retrieving revision 1.17
diff -u -r1.17 usbaudio.h
--- alsa-kernel/usb/usbaudio.h 13 May 2003 10:44:09 -0000 1.17
+++ alsa-kernel/usb/usbaudio.h 19 Jun 2003 06:51:04 -0000
@@ -28,6 +28,7 @@
#define USB_SUBCLASS_AUDIO_CONTROL 0x01
#define USB_SUBCLASS_AUDIO_STREAMING 0x02
#define USB_SUBCLASS_MIDI_STREAMING 0x03
+#define USB_SUBCLASS_VENDOR_SPEC 0xff
#define USB_DT_CS_DEVICE 0x21
#define USB_DT_CS_CONFIG 0x22
-------------------------------------------------------
This SF.Net email is sponsored by: INetU
Attention Web Developers & Consultants: Become An INetU Hosting Partner.
Refer Dedicated Servers. We Manage Them. You Get 10% Monthly Commission!
INetU Dedicated Managed Hosting http://www.inetu.net/partner/index.php
_______________________________________________
Alsa-devel mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/alsa-devel
