Device driver for onboard CS4231 audio controller which is found

on UltraSPARC workstations. The driver is based on OpenBSD's SBus
cs4231 driver and heavily modified to incorporate into sound(4)
infrastructure. Due to the lack of APCDMA documentation, the DMA
code of SBus cs4231 came from OpenBSD's driver.
The driver runs without Giant lock and supports both SBus and EBus
based CS4231 audio controller. Special thanks to marius for providing
feedbacks during the driver writing. His feedback made it possible
to write hiccup free playback code under high system loads.

Approved by:	jake (mentor)
Reviewed by:	marius (initial version)
Tested by:	marius, kwm, Julian C. Dunn(jdunn AT opentrend DOT net)

1 files changed, 90 insertions, 0 deletions

diff --git a/sys/sparc64/isa/isa_dma.c b/sys/sparc64/isa/isa_dma.c
new file mode 100644
index 000000000000..66d93fbee33f
--- /dev/null
+++ b/sys/sparc64/isa/isa_dma.c
@@ -0,0 +1,90 @@
+/*-
+ * Copyright (c) 2004 Pyun YongHyeon.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+
+#include <isa/isareg.h>
+#include <isa/isavar.h>
+
+/*
+ * Glue code to load sound(4). Though fdc(4), ppc(4) don't work on
+ * sparc64 yet, they may need this glue code too.
+ */
+
+int
+isa_dma_init(int chan, u_int bouncebufsize, int flag)
+{
+
+	return (0);
+}
+
+int
+isa_dma_acquire(int chan)
+{
+	return (0);
+}
+
+void
+isa_dma_release(int chan)
+{
+
+}
+
+void
+isa_dmacascade(int chan)
+{
+
+}
+
+void
+isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan)
+{
+
+}
+
+void
+isa_dmadone(int flags, caddr_t addr, int nbytes, int chan)
+{
+
+}
+
+int
+isa_dmastatus(int chan)
+{
+	return (0);
+}
+
+int
+isa_dmastop(int chan)
+{
+	return (0);
+}