1 /* 2 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk> 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 * $FreeBSD$ 27 */ 28 29 #define SND_DMA(b) (sndbuf_getflags((b)) & SNDBUF_F_DMA) 30 #define SNDBUF_LOCKASSERT(b) 31 32 #define SNDBUF_F_DMA 0x00000001 33 #define SNDBUF_F_XRUN 0x00000002 34 #define SNDBUF_F_RUNNING 0x00000004 35 36 #define SNDBUF_NAMELEN 48 37 38 struct snd_dbuf { 39 device_t dev; 40 u_int8_t *buf, *tmpbuf; 41 unsigned int bufsize, maxsize; 42 volatile int dl; /* transfer size */ 43 volatile int rp; /* pointers to the ready area */ 44 volatile int rl; /* length of ready area */ 45 volatile int hp; 46 volatile u_int32_t total, prev_total; 47 int dmachan, dir; /* dma channel */ 48 u_int32_t fmt, spd, bps; 49 unsigned int blksz, blkcnt; 50 int xrun; 51 u_int32_t flags; 52 bus_dmamap_t dmamap; 53 bus_dma_tag_t dmatag; 54 struct selinfo sel; 55 char name[SNDBUF_NAMELEN]; 56 }; 57 58 struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc); 59 void sndbuf_destroy(struct snd_dbuf *b); 60 61 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what); 62 63 int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size); 64 int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size); 65 void sndbuf_free(struct snd_dbuf *b); 66 int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz); 67 int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz); 68 void sndbuf_reset(struct snd_dbuf *b); 69 void sndbuf_clear(struct snd_dbuf *b, unsigned int length); 70 void sndbuf_fillsilence(struct snd_dbuf *b); 71 72 u_int32_t sndbuf_getfmt(struct snd_dbuf *b); 73 int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt); 74 unsigned int sndbuf_getspd(struct snd_dbuf *b); 75 void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd); 76 unsigned int sndbuf_getbps(struct snd_dbuf *b); 77 78 void *sndbuf_getbuf(struct snd_dbuf *b); 79 void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs); 80 unsigned int sndbuf_getsize(struct snd_dbuf *b); 81 unsigned int sndbuf_getmaxsize(struct snd_dbuf *b); 82 unsigned int sndbuf_getalign(struct snd_dbuf *b); 83 unsigned int sndbuf_getblkcnt(struct snd_dbuf *b); 84 void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt); 85 unsigned int sndbuf_getblksz(struct snd_dbuf *b); 86 void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz); 87 unsigned int sndbuf_runsz(struct snd_dbuf *b); 88 void sndbuf_setrun(struct snd_dbuf *b, int go); 89 struct selinfo *sndbuf_getsel(struct snd_dbuf *b); 90 91 unsigned int sndbuf_getxrun(struct snd_dbuf *b); 92 void sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt); 93 unsigned int sndbuf_gethwptr(struct snd_dbuf *b); 94 void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr); 95 unsigned int sndbuf_getfree(struct snd_dbuf *b); 96 unsigned int sndbuf_getfreeptr(struct snd_dbuf *b); 97 unsigned int sndbuf_getready(struct snd_dbuf *b); 98 unsigned int sndbuf_getreadyptr(struct snd_dbuf *b); 99 unsigned int sndbuf_getblocks(struct snd_dbuf *b); 100 unsigned int sndbuf_getprevblocks(struct snd_dbuf *b); 101 unsigned int sndbuf_gettotal(struct snd_dbuf *b); 102 void sndbuf_updateprevtotal(struct snd_dbuf *b); 103 104 int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count); 105 int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count); 106 int sndbuf_uiomove(struct snd_dbuf *b, struct uio *uio, unsigned int count); 107 int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count); 108 109 u_int32_t sndbuf_getflags(struct snd_dbuf *b); 110 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on); 111 112 int sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq); 113 int sndbuf_dmasetdir(struct snd_dbuf *b, int dir); 114 void sndbuf_dma(struct snd_dbuf *b, int go); 115 int sndbuf_dmaptr(struct snd_dbuf *b); 116 void sndbuf_dmabounce(struct snd_dbuf *b); 117