PCI AC97 emulation by malc.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3918 c046a42c-6fe2-441c-8c8c-71466251a162

configure

@@ -85,6 +85,7 @@ EXESUF=""
 gdbstub="yes"
 slirp="yes"
 adlib="no"
+ac97="no"
 oss="no"
 dsound="no"
 coreaudio="no"
@@ -280,6 +281,8 @@ for opt do
   ;;
   --enable-adlib) adlib="yes"
   ;;
+  --enable-ac97) ac97="yes"
+  ;;
   --disable-kqemu) kqemu="no"
   ;;
   --enable-profiler) profiler="yes"
@@ -406,6 +409,7 @@ echo "  --disable-sdl            disable SDL"
 echo "  --enable-cocoa           enable COCOA (Mac OS X only)"
 echo "  --enable-mingw32         enable Win32 cross compilation with mingw32"
 echo "  --enable-adlib           enable Adlib emulation"
+echo "  --enable-ac97            enable AC97 emulation"
 echo "  --enable-coreaudio       enable Coreaudio audio driver"
 echo "  --enable-alsa            enable ALSA audio driver"
 echo "  --enable-esd             enable EsoundD audio driver"
@@ -719,6 +723,7 @@ if test "$sdl" != "no" ; then
 fi
 echo "mingw32 support   $mingw32"
 echo "Adlib support     $adlib"
+echo "AC97 support      $ac97"
 echo "CoreAudio support $coreaudio"
 echo "ALSA support      $alsa"
 echo "EsounD support    $esd"
@@ -895,6 +900,10 @@ if test "$adlib" = "yes" ; then
   echo "CONFIG_ADLIB=yes" >> $config_mak
   echo "#define CONFIG_ADLIB 1" >> $config_h
 fi
+if test "$ac97" = "yes" ; then
+  echo "CONFIG_AC97=yes" >> $config_mak
+  echo "#define CONFIG_AC97 1" >> $config_h
+fi
 if test "$oss" = "yes" ; then
   echo "CONFIG_OSS=yes" >> $config_mak
   echo "#define CONFIG_OSS 1" >> $config_h

hw/audiodev.h

@@ -10,3 +10,5 @@ int Adlib_init (AudioState *s, qemu_irq *pic);
 /* gus.c */
 int GUS_init (AudioState *s, qemu_irq *pic);
 
+/* ac97.c */
+int ac97_init (PCIBus *buf, AudioState *s);

qemu-doc.texi

@@ -166,6 +166,8 @@ Creative SoundBlaster 16 sound card
 @item
 ENSONIQ AudioPCI ES1370 sound card
 @item
+Intel 82801AA AC97 Audio compatible sound card
+@item
 Adlib(OPL2) - Yamaha YM3812 compatible chip
 @item
 PCI UHCI USB controller and a virtual USB hub.
@@ -173,8 +175,8 @@ PCI UHCI USB controller and a virtual USB hub.
 
 SMP is supported with up to 255 CPUs.
 
-Note that adlib is only available when QEMU was configured with
--enable-adlib
+Note that adlib and ac97 are only available when QEMU was configured
+with --enable-adlib, --enable-ac97 respectively.
 
 QEMU uses the PC BIOS from the Bochs project and the Plex86/Bochs LGPL
 VGA BIOS.
@@ -334,10 +336,18 @@ available sound hardware.
 @example
 qemu -soundhw sb16,adlib hda
 qemu -soundhw es1370 hda
+qemu -soundhw ac97 hda
 qemu -soundhw all hda
 qemu -soundhw ?
 @end example
 
+Note that Linux's i810_audio OSS kernel (for AC97) module might
+require manually specifying clocking.
+
+@example
+modprobe i810_audio clocking=48000
+@end example
+
 @item -localtime
 Set the real time clock to local time (the default is to UTC
 time). This option is needed to have correct date in MS-DOS or

vl.c

@@ -7990,6 +7990,16 @@ struct soundhw soundhw[] = {
     },
 #endif
 
+#ifdef CONFIG_AC97
+    {
+        "ac97",
+        "Intel 82801AA AC97 Audio",
+        0,
+        0,
+        { .init_pci = ac97_init }
+    },
+#endif
+
     {
         "es1370",
         "ENSONIQ AudioPCI ES1370",