1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 #define SND_DMA(b) (sndbuf_getflags((b)) & SNDBUF_F_DMA)
32 #define SNDBUF_LOCKASSERT(b)
33
34 #define SNDBUF_F_DMA 0x00000001
35 #define SNDBUF_F_XRUN 0x00000002
36 #define SNDBUF_F_RUNNING 0x00000004
37 #define SNDBUF_F_MANAGED 0x00000008
38
39 #define SNDBUF_NAMELEN 48
40
41 struct snd_dbuf {
42 device_t dev;
43 u_int8_t *buf, *tmpbuf;
44 u_int8_t *shadbuf; /**< shadow buffer used w/ S_D_SILENCE/SKIP */
45 volatile int sl; /**< shadbuf ready length in # of bytes */
46 unsigned int bufsize, maxsize, allocsize;
47 volatile int dl; /* transfer size */
48 volatile int rp; /* pointers to the ready area */
49 volatile int rl; /* length of ready area */
50 volatile int hp;
51 volatile u_int64_t total, prev_total;
52 int dmachan, dir; /* dma channel */
53 u_int32_t fmt, spd, bps, align;
54 unsigned int blksz, blkcnt;
55 int xrun;
56 u_int32_t flags;
57 bus_dmamap_t dmamap;
58 bus_dma_tag_t dmatag;
59 bus_addr_t buf_addr;
60 int dmaflags;
61 struct selinfo sel;
62 struct pcm_channel *channel;
63 char name[SNDBUF_NAMELEN];
64 };
65
66 struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel);
67 void sndbuf_destroy(struct snd_dbuf *b);
68
69 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what);
70
71 int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, int dmaflags, unsigned int size);
72 int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size);
73 void sndbuf_free(struct snd_dbuf *b);
74 int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
75 int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
76 void sndbuf_reset(struct snd_dbuf *b);
77 void sndbuf_clear(struct snd_dbuf *b, unsigned int length);
78 void sndbuf_fillsilence(struct snd_dbuf *b);
79 void sndbuf_fillsilence_rl(struct snd_dbuf *b, u_int rl);
80 void sndbuf_softreset(struct snd_dbuf *b);
81 void sndbuf_clearshadow(struct snd_dbuf *b);
82
83 u_int32_t sndbuf_getfmt(struct snd_dbuf *b);
84 int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt);
85 unsigned int sndbuf_getspd(struct snd_dbuf *b);
86 void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd);
87 unsigned int sndbuf_getbps(struct snd_dbuf *b);
88
89 bus_addr_t sndbuf_getbufaddr(struct snd_dbuf *buf);
90
91 void *sndbuf_getbuf(struct snd_dbuf *b);
92 void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs);
93 unsigned int sndbuf_getsize(struct snd_dbuf *b);
94 unsigned int sndbuf_getmaxsize(struct snd_dbuf *b);
95 unsigned int sndbuf_getallocsize(struct snd_dbuf *b);
96 unsigned int sndbuf_getalign(struct snd_dbuf *b);
97 unsigned int sndbuf_getblkcnt(struct snd_dbuf *b);
98 void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt);
99 unsigned int sndbuf_getblksz(struct snd_dbuf *b);
100 void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz);
101 unsigned int sndbuf_runsz(struct snd_dbuf *b);
102 void sndbuf_setrun(struct snd_dbuf *b, int go);
103 struct selinfo *sndbuf_getsel(struct snd_dbuf *b);
104
105 unsigned int sndbuf_getxrun(struct snd_dbuf *b);
106 void sndbuf_setxrun(struct snd_dbuf *b, unsigned int xrun);
107 unsigned int sndbuf_gethwptr(struct snd_dbuf *b);
108 void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr);
109 unsigned int sndbuf_getfree(struct snd_dbuf *b);
110 unsigned int sndbuf_getfreeptr(struct snd_dbuf *b);
111 unsigned int sndbuf_getready(struct snd_dbuf *b);
112 unsigned int sndbuf_getreadyptr(struct snd_dbuf *b);
113 u_int64_t sndbuf_getblocks(struct snd_dbuf *b);
114 u_int64_t sndbuf_getprevblocks(struct snd_dbuf *b);
115 u_int64_t sndbuf_gettotal(struct snd_dbuf *b);
116 u_int64_t sndbuf_getprevtotal(struct snd_dbuf *b);
117 unsigned int sndbuf_xbytes(unsigned int v, struct snd_dbuf *from, struct snd_dbuf *to);
118 u_int8_t sndbuf_zerodata(u_int32_t fmt);
119 void sndbuf_updateprevtotal(struct snd_dbuf *b);
120
121 int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count);
122 int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count);
123 int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count);
124
125 u_int32_t sndbuf_getflags(struct snd_dbuf *b);
126 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on);
127
128 int sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq);
129 int sndbuf_dmasetdir(struct snd_dbuf *b, int dir);
130 void sndbuf_dma(struct snd_dbuf *b, int go);
131 int sndbuf_dmaptr(struct snd_dbuf *b);
132 void sndbuf_dmabounce(struct snd_dbuf *b);
133
134 #ifdef OSSV4_EXPERIMENT
135 void sndbuf_getpeaks(struct snd_dbuf *b, int *lp, int *rp);
136 #endif
137
138 static inline u_int32_t
139 snd_xbytes(u_int32_t v, u_int32_t from, u_int32_t to)
140 {
141
142 if (from == to)
143 return (v);
144 if (from == 0)
145 return (0);
146 return ((u_int64_t)v * to / from);
147 }
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