2 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/dev/sound/isa/sndbuf_dma.c,v 1.3 2005/01/06 01:43:17 imp Exp $
27 * $DragonFly: src/sys/dev/sound/isa/sndbuf_dma.c,v 1.1 2007/01/04 21:47:02 corecode Exp $
30 #include <dev/sound/pcm/sound.h>
32 #include <bus/isa/isavar.h>
34 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/isa/sndbuf_dma.c,v 1.1 2007/01/04 21:47:02 corecode Exp $");
37 sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq)
39 /* should do isa_dma_acquire/isa_dma_release here */
43 sndbuf_setflags(b, SNDBUF_F_DMA, 1);
44 b->dmachan = rman_get_start(drq);
50 sndbuf_dmasetdir(struct snd_dbuf *b, int dir)
52 KASSERT(b, ("sndbuf_dmasetdir called with b == NULL"));
53 KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmasetdir called on non-ISA buffer"));
55 b->dir = (dir == PCMDIR_PLAY)? ISADMA_WRITE : ISADMA_READ;
60 sndbuf_dma(struct snd_dbuf *b, int go)
62 KASSERT(b, ("sndbuf_dma called with b == NULL"));
63 KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dma called on non-ISA buffer"));
67 /* isa_dmainit(b->chan, size); */
68 isa_dmastart(b->dir | ISADMA_RAW, b->buf, b->bufsize, b->dmachan);
73 isa_dmastop(b->dmachan);
74 isa_dmadone(b->dir | ISADMA_RAW, b->buf, b->bufsize, b->dmachan);
78 DEB(printf("buf 0x%p ISA DMA %s, channel %d\n",
80 (go == PCMTRIG_START)? "started" : "stopped",
85 sndbuf_dmaptr(struct snd_dbuf *b)
89 KASSERT(b, ("sndbuf_dmaptr called with b == NULL"));
90 KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmaptr called on non-ISA buffer"));
94 i = isa_dmastatus(b->dmachan);
95 KASSERT(i >= 0, ("isa_dmastatus returned %d", i));
96 return b->bufsize - i;
100 sndbuf_dmabounce(struct snd_dbuf *b)
102 KASSERT(b, ("sndbuf_dmabounce called with b == NULL"));
103 KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmabounce called on non-ISA buffer"));
105 /* tell isa_dma to bounce data in/out */