- Clean up ISA DMA supports.

- Rename all sndbuf_isadma* functions to sndbuf_dma* and move them into
  sys/dev/sound/isa/sndbuf_dma.c.

No response from:	sound

1 files changed, 103 insertions, 0 deletions

diff --git a/sys/dev/sound/isa/sndbuf_dma.c b/sys/dev/sound/isa/sndbuf_dma.c
new file mode 100644
index 0000000..d07c301
--- /dev/null
+++ b/sys/dev/sound/isa/sndbuf_dma.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
+ * 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 <dev/sound/pcm/sound.h>
+
+#include <isa/isavar.h>
+
+SND_DECLARE_FILE("$FreeBSD$");
+
+int
+sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq)
+{
+	/* should do isa_dma_acquire/isa_dma_release here */
+	if (drq == NULL) {
+		b->dmachan = -1;
+	} else {
+		sndbuf_setflags(b, SNDBUF_F_DMA, 1);
+		b->dmachan = rman_get_start(drq);
+	}
+	return 0;
+}
+
+int
+sndbuf_dmasetdir(struct snd_dbuf *b, int dir)
+{
+	KASSERT(b, ("sndbuf_dmasetdir called with b == NULL"));
+	KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmasetdir called on non-ISA buffer"));
+
+	b->dir = (dir == PCMDIR_PLAY)? ISADMA_WRITE : ISADMA_READ;
+	return 0;
+}
+
+void
+sndbuf_dma(struct snd_dbuf *b, int go)
+{
+	KASSERT(b, ("sndbuf_dma called with b == NULL"));
+	KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dma called on non-ISA buffer"));
+
+	switch (go) {
+	case PCMTRIG_START:
+		/* isa_dmainit(b->chan, size); */
+		isa_dmastart(b->dir | ISADMA_RAW, b->buf, b->bufsize, b->dmachan);
+		break;
+
+	case PCMTRIG_STOP:
+	case PCMTRIG_ABORT:
+		isa_dmastop(b->dmachan);
+		isa_dmadone(b->dir | ISADMA_RAW, b->buf, b->bufsize, b->dmachan);
+		break;
+	}
+
+	DEB(printf("buf 0x%p ISA DMA %s, channel %d\n",
+		b,
+		(go == PCMTRIG_START)? "started" : "stopped",
+		b->dmachan));
+}
+
+int
+sndbuf_dmaptr(struct snd_dbuf *b)
+{
+	int i;
+
+	KASSERT(b, ("sndbuf_dmaptr called with b == NULL"));
+	KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmaptr called on non-ISA buffer"));
+
+	if (!sndbuf_runsz(b))
+		return 0;
+	i = isa_dmastatus(b->dmachan);
+	KASSERT(i >= 0, ("isa_dmastatus returned %d", i));
+	return b->bufsize - i;
+}
+
+void
+sndbuf_dmabounce(struct snd_dbuf *b)
+{
+	KASSERT(b, ("sndbuf_dmabounce called with b == NULL"));
+	KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmabounce called on non-ISA buffer"));
+
+	/* tell isa_dma to bounce data in/out */
+}