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 struct pcmchan_children { 30 SLIST_ENTRY(pcmchan_children) link; 31 struct pcm_channel *channel; 32 }; 33 34 struct pcmchan_caps { 35 u_int32_t minspeed, maxspeed; 36 u_int32_t *fmtlist; 37 u_int32_t caps; 38 }; 39 40 #define CHN_NAMELEN 32 41 struct pcm_channel { 42 kobj_t methods; 43 44 pid_t pid; 45 int refcount; 46 struct pcm_feeder *feeder; 47 u_int32_t align; 48 49 int volume; 50 u_int32_t speed; 51 u_int32_t format; 52 u_int32_t flags; 53 u_int32_t feederflags; 54 u_int32_t blocks; 55 56 int direction; 57 struct snd_dbuf *bufhard, *bufsoft; 58 struct snddev_info *parentsnddev; 59 struct pcm_channel *parentchannel; 60 void *devinfo; 61 char name[CHN_NAMELEN]; 62 void *lock; 63 SLIST_HEAD(, pcmchan_children) children; 64 }; 65 66 #include "channel_if.h" 67 68 int chn_reinit(struct pcm_channel *c); 69 int chn_write(struct pcm_channel *c, struct uio *buf); 70 int chn_read(struct pcm_channel *c, struct uio *buf); 71 u_int32_t chn_start(struct pcm_channel *c, int force); 72 int chn_sync(struct pcm_channel *c, int threshold); 73 int chn_flush(struct pcm_channel *c); 74 int chn_poll(struct pcm_channel *c, int ev, struct proc *p); 75 76 int chn_init(struct pcm_channel *c, void *devinfo, int dir); 77 int chn_kill(struct pcm_channel *c); 78 int chn_setdir(struct pcm_channel *c, int dir); 79 int chn_reset(struct pcm_channel *c, u_int32_t fmt); 80 int chn_setvolume(struct pcm_channel *c, int left, int right); 81 int chn_setspeed(struct pcm_channel *c, int speed); 82 int chn_setformat(struct pcm_channel *c, u_int32_t fmt); 83 int chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz); 84 int chn_trigger(struct pcm_channel *c, int go); 85 int chn_getptr(struct pcm_channel *c); 86 struct pcmchan_caps *chn_getcaps(struct pcm_channel *c); 87 u_int32_t chn_getformats(struct pcm_channel *c); 88 89 void chn_resetbuf(struct pcm_channel *c); 90 void chn_intr(struct pcm_channel *c); 91 int chn_wrfeed(struct pcm_channel *c); 92 int chn_rdfeed(struct pcm_channel *c); 93 int chn_abort(struct pcm_channel *c); 94 95 void chn_wrupdate(struct pcm_channel *c); 96 void chn_rdupdate(struct pcm_channel *c); 97 98 int chn_notify(struct pcm_channel *c, u_int32_t flags); 99 100 #ifdef USING_MUTEX 101 #define CHN_LOCK(c) mtx_lock((struct mtx *)((c)->lock)) 102 #define CHN_UNLOCK(c) mtx_unlock((struct mtx *)((c)->lock)) 103 #define CHN_LOCKASSERT(c) 104 #else 105 #define CHN_LOCK(c) 106 #define CHN_UNLOCK(c) 107 #define CHN_LOCKASSERT(c) 108 #endif 109 110 int fmtvalid(u_int32_t fmt, u_int32_t *fmtlist); 111 112 #define PCMDIR_VIRTUAL 2 113 #define PCMDIR_PLAY 1 114 #define PCMDIR_REC -1 115 116 #define PCMTRIG_START 1 117 #define PCMTRIG_EMLDMAWR 2 118 #define PCMTRIG_EMLDMARD 3 119 #define PCMTRIG_STOP 0 120 #define PCMTRIG_ABORT -1 121 122 #define CHN_F_CLOSING 0x00000004 /* a pending close */ 123 #define CHN_F_ABORTING 0x00000008 /* a pending abort */ 124 #define CHN_F_RUNNING 0x00000010 /* dma is running */ 125 #define CHN_F_TRIGGERED 0x00000020 126 #define CHN_F_NOTRIGGER 0x00000040 127 128 #define CHN_F_BUSY 0x00001000 /* has been opened */ 129 #define CHN_F_HAS_SIZE 0x00002000 /* user set block size */ 130 #define CHN_F_NBIO 0x00004000 /* do non-blocking i/o */ 131 #define CHN_F_MAPPED 0x00010000 /* has been mmap()ed */ 132 #define CHN_F_DEAD 0x00020000 133 #define CHN_F_BADSETTING 0x00040000 134 135 #define CHN_F_VIRTUAL 0x10000000 /* not backed by hardware */ 136 137 #define CHN_F_RESET (CHN_F_BUSY | CHN_F_DEAD | CHN_F_VIRTUAL) 138 139 #define CHN_N_RATE 0x00000001 140 #define CHN_N_FORMAT 0x00000002 141 #define CHN_N_VOLUME 0x00000004 142 #define CHN_N_BLOCKSIZE 0x00000008 143 #define CHN_N_TRIGGER 0x00000010 144 145 /* 146 * This should be large enough to hold all pcm data between 147 * tsleeps in chn_{read,write} at the highest sample rate. 148 * (which is usually 48kHz * 16bit * stereo = 192000 bytes/sec) 149 */ 150 #define CHN_2NDBUFBLKSIZE (2 * 1024) 151 /* The total number of blocks per secondary bufhard. */ 152 #define CHN_2NDBUFBLKNUM (32) 153 /* The size of a whole secondary bufhard. */ 154 #define CHN_2NDBUFMAXSIZE (131072) 155 156 #define CHN_DEFAULT_HZ 50 157 158 #define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj)) 159