>Number:         5988
>Category:       kern
>Synopsis:       MMAP not supported for GUS Soundcards
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Aug 19 12:35:01 1998
>Last-Modified:
>Originator:     Feico Dillema
>Organization:
University of Twente
>Release:        NetBSD 1.3G
>Environment:
System: NetBSD zila 1.3G NetBSD 1.3G (ZILA.i4b) #1: Wed Aug 19 18:34:17 CEST 1998 root@zila:/usr/src/sys/arch/i386/compile/ZILA.i4b i386

with Gus Max UltraSound Soundcard

>Description:
	MMAP support is absent in the gus driver. 
	audioctl -a lists:

	properties=full_duplex

	i.e. no `mmap'

>How-To-Repeat:

	Start `quake' ? ;-}

>Fix:

	Fix is simply adding a couple of lines to gus.c to enable
	mmap support. The code is there, so the fix is trivial.
	Here is my patch:

--- gus.c.orig  Wed Aug 19 19:55:35 1998
+++ gus.c       Wed Aug 19 21:18:15 1998
@@ -603,10 +603,10 @@
        gus_mixer_set_port,
        gus_mixer_get_port,
        gus_mixer_query_devinfo,
-       NULL,
-       NULL,
-       NULL,
-        NULL,
+        ad1848_malloc,
+        ad1848_free,
+        ad1848_round,
+        ad1848_mappage,
        gus_get_props,
 };
 
@@ -638,10 +638,10 @@
        gusmax_mixer_set_port,
        gusmax_mixer_get_port,
        gusmax_mixer_query_devinfo,
-       NULL,
-       NULL,
-       NULL,
-       NULL,
+        ad1848_malloc,
+        ad1848_free,
+        ad1848_round,
+        ad1848_mappage,
        gusmax_get_props,
 };
 
@@ -3551,7 +3551,8 @@
        void *addr;
 {
        struct gus_softc *sc = addr;
-       return sc->sc_recdrq == sc->sc_drq ? 0 : AUDIO_PROP_FULLDUPLEX;
+       return (AUDIO_PROP_MMAP | 
+               (sc->sc_recdrq == sc->sc_drq ? 0 : AUDIO_PROP_FULLDUPLEX));
 }
 
 STATIC int

>Audit-Trail:
>Unformatted: