1/*- 2 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 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 24 * SUCH DAMAGE. 25 */ 26 27#ifdef HAVE_KERNEL_OPTION_HEADERS 28#include "opt_snd.h" 29#endif 30 31#include <dev/sound/pcm/sound.h> 32 33#include <isa/isavar.h> 34 35SND_DECLARE_FILE("$FreeBSD$"); 36 37int 38sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq) 39{ 40 /* should do isa_dma_acquire/isa_dma_release here */ 41 if (drq == NULL) { 42 b->dmachan = -1; 43 } else { 44 sndbuf_setflags(b, SNDBUF_F_DMA, 1); 45 b->dmachan = rman_get_start(drq); 46 } 47 return 0; 48} 49 50int 51sndbuf_dmasetdir(struct snd_dbuf *b, int dir) 52{ 53 KASSERT(b, ("sndbuf_dmasetdir called with b == NULL")); 54 KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmasetdir called on non-ISA buffer")); 55 56 b->dir = (dir == PCMDIR_PLAY)? ISADMA_WRITE : ISADMA_READ; 57 return 0; 58} 59 60void 61sndbuf_dma(struct snd_dbuf *b, int go) 62{ 63 KASSERT(b, ("sndbuf_dma called with b == NULL")); 64 KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dma called on non-ISA buffer")); 65 66 switch (go) { 67 case PCMTRIG_START: 68 /* isa_dmainit(b->chan, size); */ 69 isa_dmastart(b->dir | ISADMA_RAW, b->buf, b->bufsize, b->dmachan); 70 break; 71 72 case PCMTRIG_STOP: 73 case PCMTRIG_ABORT: 74 isa_dmastop(b->dmachan); 75 isa_dmadone(b->dir | ISADMA_RAW, b->buf, b->bufsize, b->dmachan); 76 break; 77 } 78 79 DEB(printf("buf 0x%p ISA DMA %s, channel %d\n", 80 b, 81 (go == PCMTRIG_START)? "started" : "stopped", 82 b->dmachan)); 83} 84 85int 86sndbuf_dmaptr(struct snd_dbuf *b) 87{ 88 int i; 89 90 KASSERT(b, ("sndbuf_dmaptr called with b == NULL")); 91 KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmaptr called on non-ISA buffer")); 92 93 if (!sndbuf_runsz(b)) 94 return 0; 95 i = isa_dmastatus(b->dmachan); 96 KASSERT(i >= 0, ("isa_dmastatus returned %d", i)); 97 return b->bufsize - i; 98} 99 100void 101sndbuf_dmabounce(struct snd_dbuf *b) 102{ 103 KASSERT(b, ("sndbuf_dmabounce called with b == NULL")); 104 KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmabounce called on non-ISA buffer")); 105 106 /* tell isa_dma to bounce data in/out */ 107} 108