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/*
* Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
* 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 */
}
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