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From: Hans Petter Selasky <hselasky@FreeBSD.org>
Date: Tue, 5 Aug 2014 18:35:34 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r269602 - head/sys/dev/usb/gadget
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Author: hselasky
Date: Tue Aug  5 18:35:34 2014
New Revision: 269602
URL: http://svnweb.freebsd.org/changeset/base/269602

Log:
  Add handler for read-back of USB audio volume levels.

Modified:
  head/sys/dev/usb/gadget/g_audio.c

Modified: head/sys/dev/usb/gadget/g_audio.c
==============================================================================
--- head/sys/dev/usb/gadget/g_audio.c	Tue Aug  5 18:19:51 2014	(r269601)
+++ head/sys/dev/usb/gadget/g_audio.c	Tue Aug  5 18:35:34 2014	(r269602)
@@ -587,6 +587,16 @@ g_audio_handle_request(device_t dev,
 				*plen = 0;
 			}
 			return (0);
+		} else if ((req->bmRequestType == UT_READ_CLASS_INTERFACE) &&
+		    (req->bRequest == 0x81 /* get value */ )) {
+
+			if (offset == 0) {
+				*plen = sizeof(sc->sc_volume_setting);
+				*pptr = &sc->sc_volume_setting;
+			} else {
+				*plen = 0;
+			}
+			return (0);
 		} else if ((req->bmRequestType == UT_WRITE_CLASS_INTERFACE) &&
 		    (req->bRequest == 0x01 /* set value */ )) {