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authorleo <leo@NetBSD.org>1996-03-27 10:07:45 +0000
committerleo <leo@NetBSD.org>1996-03-27 10:07:45 +0000
commitc5a7f4e97776e6e1c5fa8436ddbb1df63cf00ac7 (patch)
treed948fb3d33f58a7f9941980b64d747aec16fe75e /sys/arch/atari/dev/ym2149.c
parent5cb9a24e7901090a23efb03ac06e3fb9d9296ba2 (diff)
Take out direct access to the YM2149. The chip definitions are moved
from video.h to ym2149reg.h.
Diffstat (limited to 'sys/arch/atari/dev/ym2149.c')
-rw-r--r--sys/arch/atari/dev/ym2149.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/sys/arch/atari/dev/ym2149.c b/sys/arch/atari/dev/ym2149.c
new file mode 100644
index 00000000000..b8b11777b4a
--- /dev/null
+++ b/sys/arch/atari/dev/ym2149.c
@@ -0,0 +1,60 @@
+/* $NetBSD: ym2149.c,v 1.1 1996/03/27 10:08:32 leo Exp $ */
+
+/*
+ * Copyright (c) 1996 Leo Weppelman.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Leo Weppelman.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <machine/iomap.h>
+#include <atari/dev/ym2149reg.h>
+
+/*
+ * Yahama YM-2149 Programmable Sound Generator
+ *
+ * For now only an init function is here...
+ */
+u_char ym2149_ioa; /* Soft-copy of port-A */
+
+void
+ym2149_init()
+{
+ /*
+ * Initialize the sound-chip YM2149:
+ * All sounds off, both I/O ports output.
+ */
+ YM2149->sd_selr = YM_MFR;
+ YM2149->sd_wdat = 0xff;
+
+ /*
+ * Sensible value for ioa:
+ */
+ YM2149->sd_selr = YM_IOA;
+ YM2149->sd_wdat = ym2149_ioa = PA_FDSEL|PA_PSTROBE|PA_SER2;
+}