/* * Copyright (c) 1999 Cameron Grant * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include SND_DECLARE_FILE("$FreeBSD$"); #define OLDPCM_IOCTL static d_open_t dsp_open; static d_close_t dsp_close; static d_read_t dsp_read; static d_write_t dsp_write; static d_ioctl_t dsp_ioctl; static d_poll_t dsp_poll; static d_mmap_t dsp_mmap; static struct cdevsw dsp_cdevsw = { .d_open = dsp_open, .d_close = dsp_close, .d_read = dsp_read, .d_write = dsp_write, .d_ioctl = dsp_ioctl, .d_poll = dsp_poll, .d_mmap = dsp_mmap, .d_name = "dsp", .d_maj = SND_CDEV_MAJOR, }; #ifdef USING_DEVFS static eventhandler_tag dsp_ehtag; #endif static struct snddev_info * dsp_get_info(dev_t dev) { struct snddev_info *d; int unit; unit = PCMUNIT(dev); if (unit >= devclass_get_maxunit(pcm_devclass)) return NULL; d = devclass_get_softc(pcm_devclass, unit); return d; } static u_int32_t dsp_get_flags(dev_t dev) { device_t bdev; int unit; unit = PCMUNIT(dev); if (unit >= devclass_get_maxunit(pcm_devclass)) return 0xffffffff; bdev = devclass_get_device(pcm_devclass, unit); return pcm_getflags(bdev); } static void dsp_set_flags(dev_t dev, u_int32_t flags) { device_t bdev; int unit; unit = PCMUNIT(dev); if (unit >= devclass_get_maxunit(pcm_devclass)) return; bdev = devclass_get_device(pcm_devclass, unit); pcm_setflags(bdev, flags); } /* * return the channels channels associated with an open device instance. * set the priority if the device is simplex and one direction (only) is * specified. * lock channels specified. */ static int getchns(dev_t dev, struct pcm_channel **rdch, struct pcm_channel **wrch, u_int32_t prio) { struct snddev_info *d; u_int32_t flags; flags = dsp_get_flags(dev); d = dsp_get_info(dev); pcm_lock(d); pcm_inprog(d, 1); KASSERT((flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \ ("getchns: read and write both prioritised")); if ((flags & SD_F_PRIO_SET) == 0 && (prio != (SD_F_PRIO_RD | SD_F_PRIO_WR))) { flags |= prio & (SD_F_PRIO_RD | SD_F_PRIO_WR); dsp_set_flags(dev, flags); } *rdch = dev->si_drv1; *wrch = dev->si_drv2; if ((flags & SD_F_SIMPLEX) && (flags & SD_F_PRIO_SET)) { if (prio) { if (*rdch && flags & SD_F_PRIO_WR) { dev->si_drv1 = NULL; *rdch = pcm_getfakechan(d); } else if (*wrch && flags & SD_F_PRIO_RD) { dev->si_drv2 = NULL; *wrch = pcm_getfakechan(d); } } pcm_getfakechan(d)->flags |= CHN_F_BUSY; } pcm_unlock(d); if (*rdch && *rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD)) CHN_LOCK(*rdch); if (*wrch && *wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR)) CHN_LOCK(*wrch); return 0; } /* unlock specified channels */ static void relchns(dev_t dev, struct pcm_channel *rdch, struct pcm_channel *wrch, u_int32_t prio) { struct snddev_info *d; d = dsp_get_info(dev); if (wrch && wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR)) CHN_UNLOCK(wrch); if (rdch && rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD)) CHN_UNLOCK(rdch); pcm_lock(d); pcm_inprog(d, -1); pcm_unlock(d); } static int dsp_open(dev_t i_dev, int flags, int mode, struct thread *td) { struct pcm_channel *rdch, *wrch; struct snddev_info *d; intrmask_t s; u_int32_t fmt; int devtype; int rdref; int error; s = spltty(); d = dsp_get_info(i_dev); devtype = PCMDEV(i_dev); /* decide default format */ switch (devtype) { case SND_DEV_DSP16: fmt = AFMT_S16_LE; break; case SND_DEV_DSP: fmt = AFMT_U8; break; case SND_DEV_AUDIO: fmt = AFMT_MU_LAW; break; case SND_DEV_NORESET: fmt = 0; break; case SND_DEV_DSPREC: fmt = AFMT_U8; if (mode & FWRITE) { splx(s); return EINVAL; } break; default: panic("impossible devtype %d", devtype); } rdref = 0; /* lock snddev so nobody else can monkey with it */ pcm_lock(d); rdch = i_dev->si_drv1; wrch = i_dev->si_drv2; if ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) && (rdch || wrch)) { /* we're a simplex device and already open, no go */ pcm_unlock(d); splx(s); return EBUSY; } if (((flags & FREAD) && rdch) || ((flags & FWRITE) && wrch)) { /* * device already open in one or both directions that * the opener wants; we can't handle this. */ pcm_unlock(d); splx(s); return EBUSY; } /* * if we get here, the open request is valid- either: * * we were previously not open * * we were open for play xor record and the opener wants * the non-open direction */ if (flags & FREAD) { /* open for read */ if (devtype == SND_DEV_DSPREC) rdch = pcm_chnalloc(d, PCMDIR_REC, td->td_proc->p_pid, PCMCHAN(i_dev)); else rdch = pcm_chnalloc(d, PCMDIR_REC, td->td_proc->p_pid, -1); if (!rdch) { /* no channel available, exit */ pcm_unlock(d); splx(s); return EBUSY; } /* got a channel, already locked for us */ if (chn_reset(rdch, fmt)) { pcm_chnrelease(rdch); i_dev->si_drv1 = NULL; pcm_unlock(d); splx(s); return ENODEV; } if (flags & O_NONBLOCK) rdch->flags |= CHN_F_NBIO; pcm_chnref(rdch, 1); CHN_UNLOCK(rdch); rdref = 1; /* * Record channel created, ref'ed and unlocked */ } if (flags & FWRITE) { /* open for write */ wrch = pcm_chnalloc(d, PCMDIR_PLAY, td->td_proc->p_pid, -1); error = 0; if (!wrch) error = EBUSY; /* XXX Right return code? */ else if (chn_reset(wrch, fmt)) error = ENODEV; if (error != 0) { if (wrch) { /* * Free play channel */ pcm_chnrelease(wrch); i_dev->si_drv2 = NULL; } if (rdref) { /* * Lock, deref and release previously created record channel */ CHN_LOCK(rdch); pcm_chnref(rdch, -1); pcm_chnrelease(rdch); i_dev->si_drv1 = NULL; } pcm_unlock(d); splx(s); return error; } if (flags & O_NONBLOCK) wrch->flags |= CHN_F_NBIO; pcm_chnref(wrch, 1); CHN_UNLOCK(wrch); } i_dev->si_drv1 = rdch; i_dev->si_drv2 = wrch; pcm_unlock(d); splx(s); return 0; } static int dsp_close(dev_t i_dev, int flags, int mode, struct thread *td) { struct pcm_channel *rdch, *wrch; struct snddev_info *d; intrmask_t s; int refs; s = spltty(); d = dsp_get_info(i_dev); pcm_lock(d); rdch = i_dev->si_drv1; wrch = i_dev->si_drv2; refs = 0; if (rdch) { CHN_LOCK(rdch); refs += pcm_chnref(rdch, -1); CHN_UNLOCK(rdch); } if (wrch) { CHN_LOCK(wrch); refs += pcm_chnref(wrch, -1); CHN_UNLOCK(wrch); } /* * If there are no more references, release the channels. */ if ((rdch || wrch) && refs == 0) { if (pcm_getfakechan(d)) pcm_getfakechan(d)->flags = 0; i_dev->si_drv1 = NULL; i_dev->si_drv2 = NULL; dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT); pcm_unlock(d); if (rdch) { CHN_LOCK(rdch); chn_abort(rdch); /* won't sleep */ rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); chn_reset(rdch, 0); pcm_chnrelease(rdch); } if (wrch) { CHN_LOCK(wrch); /* * XXX: Maybe the right behaviour is to abort on non_block. * It seems that mplayer flushes the audio queue by quickly * closing and re-opening. In FBSD, there's a long pause * while the audio queue flushes that I presume isn't there in * linux. */ chn_flush(wrch); /* may sleep */ wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); chn_reset(wrch, 0); pcm_chnrelease(wrch); } } else pcm_unlock(d); splx(s); return 0; } static int dsp_read(dev_t i_dev, struct uio *buf, int flag) { struct pcm_channel *rdch, *wrch; intrmask_t s; int ret; s = spltty(); getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD); KASSERT(rdch, ("dsp_read: nonexistant channel")); KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel")); if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); splx(s); return EINVAL; } if (!(rdch->flags & CHN_F_RUNNING)) rdch->flags |= CHN_F_RUNNING; ret = chn_read(rdch, buf); relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); splx(s); return ret; } static int dsp_write(dev_t i_dev, struct uio *buf, int flag) { struct pcm_channel *rdch, *wrch; intrmask_t s; int ret; s = spltty(); getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR); KASSERT(wrch, ("dsp_write: nonexistant channel")); KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel")); if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); splx(s); return EINVAL; } if (!(wrch->flags & CHN_F_RUNNING)) wrch->flags |= CHN_F_RUNNING; ret = chn_write(wrch, buf); relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); splx(s); return ret; } static int dsp_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td) { struct pcm_channel *wrch, *rdch; struct snddev_info *d; intrmask_t s; int kill; int ret = 0, *arg_i = (int *)arg, tmp; /* * this is an evil hack to allow broken apps to perform mixer ioctls * on dsp devices. */ if (IOCGROUP(cmd) == 'M') { dev_t pdev; pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0)); return mixer_ioctl(pdev, cmd, arg, mode, td); } s = spltty(); d = dsp_get_info(i_dev); getchns(i_dev, &rdch, &wrch, 0); kill = 0; if (wrch && (wrch->flags & CHN_F_DEAD)) kill |= 1; if (rdch && (rdch->flags & CHN_F_DEAD)) kill |= 2; if (kill == 3) { relchns(i_dev, rdch, wrch, 0); splx(s); return EINVAL; } if (kill & 1) wrch = NULL; if (kill & 2) rdch = NULL; switch(cmd) { #ifdef OLDPCM_IOCTL /* * we start with the new ioctl interface. */ case AIONWRITE: /* how many bytes can write ? */ /* if (wrch && wrch->bufhard.dl) while (chn_wrfeed(wrch) == 0); */ *arg_i = wrch? sndbuf_getfree(wrch->bufsoft) : 0; break; case AIOSSIZE: /* set the current blocksize */ { struct snd_size *p = (struct snd_size *)arg; p->play_size = 0; p->rec_size = 0; if (wrch) { CHN_LOCK(wrch); chn_setblocksize(wrch, 2, p->play_size); p->play_size = sndbuf_getblksz(wrch->bufsoft); CHN_UNLOCK(wrch); } if (rdch) { CHN_LOCK(rdch); chn_setblocksize(rdch, 2, p->rec_size); p->rec_size = sndbuf_getblksz(rdch->bufsoft); CHN_UNLOCK(rdch); } } break; case AIOGSIZE: /* get the current blocksize */ { struct snd_size *p = (struct snd_size *)arg; if (wrch) p->play_size = sndbuf_getblksz(wrch->bufsoft); if (rdch) p->rec_size = sndbuf_getblksz(rdch->bufsoft); } break; case AIOSFMT: { snd_chan_param *p = (snd_chan_param *)arg; if (wrch) { CHN_LOCK(wrch); chn_setformat(wrch, p->play_format); chn_setspeed(wrch, p->play_rate); CHN_UNLOCK(wrch); } if (rdch) { CHN_LOCK(rdch); chn_setformat(rdch, p->rec_format); chn_setspeed(rdch, p->rec_rate); CHN_UNLOCK(rdch); } } /* FALLTHROUGH */ case AIOGFMT: { snd_chan_param *p = (snd_chan_param *)arg; p->play_rate = wrch? wrch->speed : 0; p->rec_rate = rdch? rdch->speed : 0; p->play_format = wrch? wrch->format : 0; p->rec_format = rdch? rdch->format : 0; } break; case AIOGCAP: /* get capabilities */ { snd_capabilities *p = (snd_capabilities *)arg; struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; dev_t pdev; if (rdch) { CHN_LOCK(rdch); rcaps = chn_getcaps(rdch); } if (wrch) { CHN_LOCK(wrch); pcaps = chn_getcaps(wrch); } p->rate_min = max(rcaps? rcaps->minspeed : 0, pcaps? pcaps->minspeed : 0); p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, pcaps? pcaps->maxspeed : 1000000); p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); /* XXX bad on sb16 */ p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & (wrch? chn_getformats(wrch) : 0xffffffff); if (rdch && wrch) p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0)); p->mixers = 1; /* default: one mixer */ p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; p->left = p->right = 100; if (wrch) CHN_UNLOCK(wrch); if (rdch) CHN_UNLOCK(rdch); } break; case AIOSTOP: if (*arg_i == AIOSYNC_PLAY && wrch) *arg_i = chn_abort(wrch); else if (*arg_i == AIOSYNC_CAPTURE && rdch) *arg_i = chn_abort(rdch); else { printf("AIOSTOP: bad channel 0x%x\n", *arg_i); *arg_i = 0; } break; case AIOSYNC: printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); break; #endif /* * here follow the standard ioctls (filio.h etc.) */ case FIONREAD: /* get # bytes to read */ /* if (rdch && rdch->bufhard.dl) while (chn_rdfeed(rdch) == 0); */ *arg_i = rdch? sndbuf_getready(rdch->bufsoft) : 0; break; case FIOASYNC: /*set/clear async i/o */ DEB( printf("FIOASYNC\n") ; ) break; case SNDCTL_DSP_NONBLOCK: case FIONBIO: /* set/clear non-blocking i/o */ if (rdch) rdch->flags &= ~CHN_F_NBIO; if (wrch) wrch->flags &= ~CHN_F_NBIO; if (*arg_i) { if (rdch) rdch->flags |= CHN_F_NBIO; if (wrch) wrch->flags |= CHN_F_NBIO; } break; /* * Finally, here is the linux-compatible ioctl interface */ #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) case THE_REAL_SNDCTL_DSP_GETBLKSIZE: case SNDCTL_DSP_GETBLKSIZE: if (wrch) *arg_i = sndbuf_getblksz(wrch->bufsoft); else if (rdch) *arg_i = sndbuf_getblksz(rdch->bufsoft); else *arg_i = 0; break ; case SNDCTL_DSP_SETBLKSIZE: RANGE(*arg_i, 16, 65536); if (wrch) { CHN_LOCK(wrch); chn_setblocksize(wrch, 2, *arg_i); CHN_UNLOCK(wrch); } if (rdch) { CHN_LOCK(rdch); chn_setblocksize(rdch, 2, *arg_i); CHN_UNLOCK(rdch); } break; case SNDCTL_DSP_RESET: DEB(printf("dsp reset\n")); if (wrch) chn_abort(wrch); if (rdch) chn_abort(rdch); break; case SNDCTL_DSP_SYNC: DEB(printf("dsp sync\n")); /* chn_sync may sleep */ if (wrch) { CHN_LOCK(wrch); chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4); CHN_UNLOCK(wrch); } break; case SNDCTL_DSP_SPEED: /* chn_setspeed may sleep */ tmp = 0; if (wrch) { CHN_LOCK(wrch); ret = chn_setspeed(wrch, *arg_i); tmp = wrch->speed; CHN_UNLOCK(wrch); } if (rdch && ret == 0) { CHN_LOCK(rdch); ret = chn_setspeed(rdch, *arg_i); if (tmp == 0) tmp = rdch->speed; CHN_UNLOCK(rdch); } *arg_i = tmp; break; case SOUND_PCM_READ_RATE: *arg_i = wrch? wrch->speed : rdch->speed; break; case SNDCTL_DSP_STEREO: tmp = -1; *arg_i = (*arg_i)? AFMT_STEREO : 0; if (wrch) { CHN_LOCK(wrch); ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); tmp = (wrch->format & AFMT_STEREO)? 1 : 0; CHN_UNLOCK(wrch); } if (rdch && ret == 0) { CHN_LOCK(rdch); ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); if (tmp == -1) tmp = (rdch->format & AFMT_STEREO)? 1 : 0; CHN_UNLOCK(rdch); } *arg_i = tmp; break; case SOUND_PCM_WRITE_CHANNELS: /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ if (*arg_i != 0) { tmp = 0; *arg_i = (*arg_i != 1)? AFMT_STEREO : 0; if (wrch) { CHN_LOCK(wrch); ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); tmp = (wrch->format & AFMT_STEREO)? 2 : 1; CHN_UNLOCK(wrch); } if (rdch && ret == 0) { CHN_LOCK(rdch); ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); if (tmp == 0) tmp = (rdch->format & AFMT_STEREO)? 2 : 1; CHN_UNLOCK(rdch); } *arg_i = tmp; } else { *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; } break; case SOUND_PCM_READ_CHANNELS: *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; break; case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ *arg_i = wrch? chn_getformats(wrch) : chn_getformats(rdch); break ; case SNDCTL_DSP_SETFMT: /* sets _one_ format */ /* XXX locking */ if ((*arg_i != AFMT_QUERY)) { tmp = 0; if (wrch) { CHN_LOCK(wrch); ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO)); tmp = wrch->format & ~AFMT_STEREO; CHN_UNLOCK(wrch); } if (rdch && ret == 0) { CHN_LOCK(rdch); ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO)); if (tmp == 0) tmp = rdch->format & ~AFMT_STEREO; CHN_UNLOCK(rdch); } *arg_i = tmp; } else *arg_i = (wrch? wrch->format : rdch->format) & ~AFMT_STEREO; break; case SNDCTL_DSP_SETFRAGMENT: /* XXX locking */ DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); { u_int32_t fragln = (*arg_i) & 0x0000ffff; u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; u_int32_t fragsz; RANGE(fragln, 4, 16); fragsz = 1 << fragln; if (maxfrags == 0) maxfrags = CHN_2NDBUFMAXSIZE / fragsz; if (maxfrags < 2) maxfrags = 2; if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) maxfrags = CHN_2NDBUFMAXSIZE / fragsz; DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); if (rdch) { CHN_LOCK(rdch); ret = chn_setblocksize(rdch, maxfrags, fragsz); maxfrags = sndbuf_getblkcnt(rdch->bufsoft); fragsz = sndbuf_getblksz(rdch->bufsoft); CHN_UNLOCK(rdch); } if (wrch && ret == 0) { CHN_LOCK(wrch); ret = chn_setblocksize(wrch, maxfrags, fragsz); maxfrags = sndbuf_getblkcnt(wrch->bufsoft); fragsz = sndbuf_getblksz(wrch->bufsoft); CHN_UNLOCK(wrch); } fragln = 0; while (fragsz > 1) { fragln++; fragsz >>= 1; } *arg_i = (maxfrags << 16) | fragln; } break; case SNDCTL_DSP_GETISPACE: /* return the size of data available in the input queue */ { audio_buf_info *a = (audio_buf_info *)arg; if (rdch) { struct snd_dbuf *bs = rdch->bufsoft; CHN_LOCK(rdch); a->bytes = sndbuf_getready(bs); a->fragments = a->bytes / sndbuf_getblksz(bs); a->fragstotal = sndbuf_getblkcnt(bs); a->fragsize = sndbuf_getblksz(bs); CHN_UNLOCK(rdch); } } break; case SNDCTL_DSP_GETOSPACE: /* return space available in the output queue */ { audio_buf_info *a = (audio_buf_info *)arg; if (wrch) { struct snd_dbuf *bs = wrch->bufsoft; CHN_LOCK(wrch); chn_wrupdate(wrch); a->bytes = sndbuf_getfree(bs); a->fragments = a->bytes / sndbuf_getblksz(bs); a->fragstotal = sndbuf_getblkcnt(bs); a->fragsize = sndbuf_getblksz(bs); CHN_UNLOCK(wrch); } } break; case SNDCTL_DSP_GETIPTR: { count_info *a = (count_info *)arg; if (rdch) { struct snd_dbuf *bs = rdch->bufsoft; CHN_LOCK(rdch); chn_rdupdate(rdch); a->bytes = sndbuf_gettotal(bs); a->blocks = sndbuf_getblocks(bs) - rdch->blocks; a->ptr = sndbuf_getreadyptr(bs); rdch->blocks = sndbuf_getblocks(bs); CHN_UNLOCK(rdch); } else ret = EINVAL; } break; case SNDCTL_DSP_GETOPTR: { count_info *a = (count_info *)arg; if (wrch) { struct snd_dbuf *bs = wrch->bufsoft; CHN_LOCK(wrch); chn_wrupdate(wrch); a->bytes = sndbuf_gettotal(bs); a->blocks = sndbuf_getblocks(bs) - wrch->blocks; a->ptr = sndbuf_getreadyptr(bs); wrch->blocks = sndbuf_getblocks(bs); CHN_UNLOCK(wrch); } else ret = EINVAL; } break; case SNDCTL_DSP_GETCAPS: *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) *arg_i |= DSP_CAP_DUPLEX; break; case SOUND_PCM_READ_BITS: *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8; break; case SNDCTL_DSP_SETTRIGGER: if (rdch) { CHN_LOCK(rdch); rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); if (*arg_i & PCM_ENABLE_INPUT) chn_start(rdch, 1); else rdch->flags |= CHN_F_NOTRIGGER; CHN_UNLOCK(rdch); } if (wrch) { CHN_LOCK(wrch); wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); if (*arg_i & PCM_ENABLE_OUTPUT) chn_start(wrch, 1); else wrch->flags |= CHN_F_NOTRIGGER; CHN_UNLOCK(wrch); } break; case SNDCTL_DSP_GETTRIGGER: *arg_i = 0; if (wrch && wrch->flags & CHN_F_TRIGGERED) *arg_i |= PCM_ENABLE_OUTPUT; if (rdch && rdch->flags & CHN_F_TRIGGERED) *arg_i |= PCM_ENABLE_INPUT; break; case SNDCTL_DSP_GETODELAY: if (wrch) { struct snd_dbuf *b = wrch->bufhard; struct snd_dbuf *bs = wrch->bufsoft; CHN_LOCK(wrch); chn_wrupdate(wrch); *arg_i = sndbuf_getready(b) + sndbuf_getready(bs); CHN_UNLOCK(wrch); } else ret = EINVAL; break; case SNDCTL_DSP_POST: if (wrch) { CHN_LOCK(wrch); wrch->flags &= ~CHN_F_NOTRIGGER; chn_start(wrch, 1); CHN_UNLOCK(wrch); } break; case SNDCTL_DSP_MAPINBUF: case SNDCTL_DSP_MAPOUTBUF: case SNDCTL_DSP_SETSYNCRO: /* undocumented */ case SNDCTL_DSP_SUBDIVIDE: case SOUND_PCM_WRITE_FILTER: case SOUND_PCM_READ_FILTER: /* dunno what these do, don't sound important */ default: DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); ret = EINVAL; break; } relchns(i_dev, rdch, wrch, 0); splx(s); return ret; } static int dsp_poll(dev_t i_dev, int events, struct thread *td) { struct pcm_channel *wrch = NULL, *rdch = NULL; intrmask_t s; int ret, e; s = spltty(); ret = 0; getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); if (wrch) { e = (events & (POLLOUT | POLLWRNORM)); if (e) ret |= chn_poll(wrch, e, td); } if (rdch) { e = (events & (POLLIN | POLLRDNORM)); if (e) ret |= chn_poll(rdch, e, td); } relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); splx(s); return ret; } static int dsp_mmap(dev_t i_dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot) { struct pcm_channel *wrch = NULL, *rdch = NULL, *c; intrmask_t s; if (nprot & PROT_EXEC) return -1; s = spltty(); getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); #if 0 /* * XXX the linux api uses the nprot to select read/write buffer * our vm system doesn't allow this, so force write buffer */ if (wrch && (nprot & PROT_WRITE)) { c = wrch; } else if (rdch && (nprot & PROT_READ)) { c = rdch; } else { splx(s); return -1; } #else c = wrch; #endif if (c == NULL) { relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); splx(s); return -1; } if (offset >= sndbuf_getsize(c->bufsoft)) { relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); splx(s); return -1; } if (!(c->flags & CHN_F_MAPPED)) c->flags |= CHN_F_MAPPED; *paddr = vtophys(sndbuf_getbufofs(c->bufsoft, offset)); relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); splx(s); return 0; } int dsp_register(int unit, int channel) { make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP, channel), UID_ROOT, GID_WHEEL, 0666, "dsp%d.%d", unit, channel); make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP16, channel), UID_ROOT, GID_WHEEL, 0666, "dspW%d.%d", unit, channel); make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_AUDIO, channel), UID_ROOT, GID_WHEEL, 0666, "audio%d.%d", unit, channel); return 0; } int dsp_registerrec(int unit, int channel) { make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSPREC, channel), UID_ROOT, GID_WHEEL, 0666, "dspr%d.%d", unit, channel); return 0; } int dsp_unregister(int unit, int channel) { dev_t pdev; pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP, channel)); destroy_dev(pdev); pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP16, channel)); destroy_dev(pdev); pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_AUDIO, channel)); destroy_dev(pdev); return 0; } int dsp_unregisterrec(int unit, int channel) { dev_t pdev; pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSPREC, channel)); destroy_dev(pdev); return 0; } #ifdef USING_DEVFS static void dsp_clone(void *arg, char *name, int namelen, dev_t *dev) { dev_t pdev; int i, cont, unit, devtype; int devtypes[3] = {SND_DEV_DSP, SND_DEV_DSP16, SND_DEV_AUDIO}; char *devnames[3] = {"dsp", "dspW", "audio"}; if (*dev != NODEV) return; if (pcm_devclass == NULL) return; devtype = 0; unit = -1; for (i = 0; (i < 3) && (unit == -1); i++) { devtype = devtypes[i]; if (strcmp(name, devnames[i]) == 0) { unit = snd_unit; } else { if (dev_stdclone(name, NULL, devnames[i], &unit) != 1) unit = -1; } } if (unit == -1 || unit >= devclass_get_maxunit(pcm_devclass)) return; cont = 1; for (i = 0; cont; i++) { pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, devtype, i)); if (pdev->si_flags & SI_NAMED) { if ((pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) { *dev = pdev; return; } } else { cont = 0; } } } static void dsp_sysinit(void *p) { dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); } static void dsp_sysuninit(void *p) { if (dsp_ehtag != NULL) EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); } SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); #endif