2 * Copyright (c) 2003 Mathew Kanner
3 * Copyright (c) 1998 The NetBSD Foundation, Inc.
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Lennart Augustsson (augustss@netbsd.org).
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
32 * Parts of this file started out as NetBSD: midi.c 1.31
33 * They are mostly gone. Still the most obvious will be the state
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
41 #include <sys/queue.h>
42 #include <sys/kernel.h>
44 #include <sys/mutex.h>
46 #include <sys/signalvar.h>
48 #include <sys/selinfo.h>
49 #include <sys/sysctl.h>
50 #include <sys/types.h>
51 #include <sys/malloc.h>
52 #include <sys/param.h>
53 #include <sys/systm.h>
55 #include <sys/fcntl.h>
56 #include <sys/types.h>
61 #include <sys/module.h>
63 #ifdef HAVE_KERNEL_OPTION_HEADERS
67 #include <dev/sound/midi/midi.h>
70 #include <dev/sound/midi/midiq.h>
72 MALLOC_DEFINE(M_MIDI, "midi buffers", "Midi data allocation area");
74 #ifndef KOBJMETHOD_END
75 #define KOBJMETHOD_END { NULL, NULL }
78 #define PCMMKMINOR(u, d, c) ((((c) & 0xff) << 16) | (((u) & 0x0f) << 4) | ((d) & 0x0f))
79 #define MIDIMKMINOR(u, d, c) PCMMKMINOR(u, d, c)
81 #define MIDI_DEV_RAW 2
82 #define MIDI_DEV_MIDICTL 12
85 MIDI_IN_START, MIDI_IN_SYSEX, MIDI_IN_DATA
89 * The MPU interface current has init() uninit() inqsize() outqsize()
90 * callback() : fiddle with the tx|rx status.
96 * /dev/rmidi Structure definitions
99 #define MIDI_NAMELEN 16
102 struct mtx lock; /* Protects all but queues */
105 int unit; /* Should only be used in midistat */
106 int channel; /* Should only be used in midistat */
109 int flags; /* File flags */
110 char name[MIDI_NAMELEN];
111 struct mtx qlock; /* Protects inq, outq and flags */
112 MIDIQ_HEAD(, char) inq, outq;
114 struct selinfo rsel, wsel;
115 int hiwat; /* QLEN(outq)>High-water -> disable
116 * writes from userland */
117 enum midi_states inq_state;
118 int inq_status, inq_left; /* Variables for the state machine in
119 * Midi_in, this is to provide that
120 * signals only get issued only
121 * complete command packets. */
124 struct synth_midi *synth;
126 TAILQ_ENTRY(snd_midi) link;
134 static synth_open_t midisynth_open;
135 static synth_close_t midisynth_close;
136 static synth_writeraw_t midisynth_writeraw;
137 static synth_killnote_t midisynth_killnote;
138 static synth_startnote_t midisynth_startnote;
139 static synth_setinstr_t midisynth_setinstr;
140 static synth_alloc_t midisynth_alloc;
141 static synth_controller_t midisynth_controller;
142 static synth_bender_t midisynth_bender;
145 static kobj_method_t midisynth_methods[] = {
146 KOBJMETHOD(synth_open, midisynth_open),
147 KOBJMETHOD(synth_close, midisynth_close),
148 KOBJMETHOD(synth_writeraw, midisynth_writeraw),
149 KOBJMETHOD(synth_setinstr, midisynth_setinstr),
150 KOBJMETHOD(synth_startnote, midisynth_startnote),
151 KOBJMETHOD(synth_killnote, midisynth_killnote),
152 KOBJMETHOD(synth_alloc, midisynth_alloc),
153 KOBJMETHOD(synth_controller, midisynth_controller),
154 KOBJMETHOD(synth_bender, midisynth_bender),
158 DEFINE_CLASS(midisynth, midisynth_methods, 0);
161 * Module Exports & Interface
163 * struct midi_chan *midi_init(MPU_CLASS cls, int unit, int chan,
165 * int midi_uninit(struct snd_midi *)
168 * EBUSY or other error
170 * int midi_in(struct snd_midi *, char *buf, int count)
171 * int midi_out(struct snd_midi *, char *buf, int count)
173 * midi_{in,out} return actual size transfered
179 * midi_devs tailq, holder of all rmidi instances protected by midistat_lock
182 TAILQ_HEAD(, snd_midi) midi_devs;
185 * /dev/midistat variables and declarations, protected by midistat_lock
188 static struct mtx midistat_lock;
189 static int midistat_isopen = 0;
190 static struct sbuf midistat_sbuf;
191 static int midistat_bufptr;
192 static struct cdev *midistat_dev;
195 * /dev/midistat dev_t declarations
198 static d_open_t midistat_open;
199 static d_close_t midistat_close;
200 static d_read_t midistat_read;
202 static struct cdevsw midistat_cdevsw = {
203 .d_version = D_VERSION,
204 .d_open = midistat_open,
205 .d_close = midistat_close,
206 .d_read = midistat_read,
207 .d_name = "midistat",
212 * /dev/rmidi dev_t declarations, struct variable access is protected by
213 * locks contained within the structure.
216 static d_open_t midi_open;
217 static d_close_t midi_close;
218 static d_ioctl_t midi_ioctl;
219 static d_read_t midi_read;
220 static d_write_t midi_write;
221 static d_poll_t midi_poll;
223 static struct cdevsw midi_cdevsw = {
224 .d_version = D_VERSION,
226 .d_close = midi_close,
228 .d_write = midi_write,
229 .d_ioctl = midi_ioctl,
235 * Prototypes of library functions
238 static int midi_destroy(struct snd_midi *, int);
239 static int midistat_prepare(struct sbuf * s);
240 static int midi_load(void);
241 static int midi_unload(void);
246 SYSCTL_NODE(_hw, OID_AUTO, midi, CTLFLAG_RD, 0, "Midi driver");
247 static SYSCTL_NODE(_hw_midi, OID_AUTO, stat, CTLFLAG_RD, 0, "Status device");
250 /* XXX: should this be moved into debug.midi? */
251 SYSCTL_INT(_hw_midi, OID_AUTO, debug, CTLFLAG_RW, &midi_debug, 0, "");
254 SYSCTL_INT(_hw_midi, OID_AUTO, dumpraw, CTLFLAG_RW, &midi_dumpraw, 0, "");
257 SYSCTL_INT(_hw_midi, OID_AUTO, instroff, CTLFLAG_RW, &midi_instroff, 0, "");
259 int midistat_verbose;
260 SYSCTL_INT(_hw_midi_stat, OID_AUTO, verbose, CTLFLAG_RW,
261 &midistat_verbose, 0, "");
263 #define MIDI_DEBUG(l,a) if(midi_debug>=l) a
269 * Register a new rmidi device. cls midi_if interface unit == 0 means
270 * auto-assign new unit number unit != 0 already assigned a unit number, eg.
271 * not the first channel provided by this device. channel, sub-unit
272 * cookie is passed back on MPU calls Typical device drivers will call with
273 * unit=0, channel=1..(number of channels) and cookie=soft_c and won't care
274 * what unit number is used.
276 * It is an error to call midi_init with an already used unit/channel combo.
278 * Returns NULL on error
282 midi_init(kobj_class_t cls, int unit, int channel, void *cookie)
286 int inqsize, outqsize;
289 MIDI_DEBUG(1, printf("midiinit: unit %d/%d.\n", unit, channel));
290 mtx_lock(&midistat_lock);
292 * Protect against call with existing unit/channel or auto-allocate a
296 TAILQ_FOREACH(m, &midi_devs, link) {
299 if (m->unit == unit && m->channel == channel) {
300 mtx_unlock(&m->lock);
305 * Find a better unit number
310 mtx_unlock(&m->lock);
316 MIDI_DEBUG(1, printf("midiinit #2: unit %d/%d.\n", unit, channel));
317 m = malloc(sizeof(*m), M_MIDI, M_NOWAIT | M_ZERO);
321 m->synth = malloc(sizeof(*m->synth), M_MIDI, M_NOWAIT | M_ZERO);
322 if (m->synth == NULL)
324 kobj_init((kobj_t)m->synth, &midisynth_class);
326 kobj_init((kobj_t)m, cls);
327 inqsize = MPU_INQSIZE(m, cookie);
328 outqsize = MPU_OUTQSIZE(m, cookie);
330 MIDI_DEBUG(1, printf("midiinit queues %d/%d.\n", inqsize, outqsize));
331 if (!inqsize && !outqsize)
334 mtx_init(&m->lock, "raw midi", NULL, 0);
335 mtx_init(&m->qlock, "q raw midi", NULL, 0);
341 buf = malloc(sizeof(MIDI_TYPE) * inqsize, M_MIDI, M_NOWAIT);
345 MIDIQ_INIT(m->inq, buf, inqsize);
348 buf = malloc(sizeof(MIDI_TYPE) * outqsize, M_MIDI, M_NOWAIT);
351 m->hiwat = outqsize / 2;
353 MIDIQ_INIT(m->outq, buf, outqsize);
355 if ((inqsize && !MIDIQ_BUF(m->inq)) ||
356 (outqsize && !MIDIQ_BUF(m->outq)))
363 m->channel = channel;
366 if (MPU_INIT(m, cookie))
369 mtx_unlock(&m->lock);
370 mtx_unlock(&m->qlock);
372 TAILQ_INSERT_TAIL(&midi_devs, m, link);
374 mtx_unlock(&midistat_lock);
376 m->dev = make_dev(&midi_cdevsw,
377 MIDIMKMINOR(unit, MIDI_DEV_RAW, channel),
378 UID_ROOT, GID_WHEEL, 0666, "midi%d.%d", unit, channel);
383 err3: mtx_destroy(&m->qlock);
384 mtx_destroy(&m->lock);
386 if (MIDIQ_BUF(m->inq))
387 free(MIDIQ_BUF(m->inq), M_MIDI);
388 if (MIDIQ_BUF(m->outq))
389 free(MIDIQ_BUF(m->outq), M_MIDI);
390 err2: free(m->synth, M_MIDI);
391 err1: free(m, M_MIDI);
392 err0: mtx_unlock(&midistat_lock);
393 MIDI_DEBUG(1, printf("midi_init ended in error\n"));
398 * midi_uninit does not call MIDI_UNINIT, as since this is the implementors
399 * entry point. midi_uninit if fact, does not send any methods. A call to
400 * midi_uninit is a defacto promise that you won't manipulate ch anymore
405 midi_uninit(struct snd_midi *m)
410 mtx_lock(&midistat_lock);
413 if (!(m->rchan || m->wchan))
425 err = midi_destroy(m, 0);
429 err: mtx_unlock(&m->lock);
430 exit: mtx_unlock(&midistat_lock);
435 * midi_in: process all data until the queue is full, then discards the rest.
436 * Since midi_in is a state machine, data discards can cause it to get out of
437 * whack. Process as much as possible. It calls, wakeup, selnotify and
438 * psignal at most once.
442 static int midi_lengths[] = {2, 2, 2, 2, 1, 1, 2, 0};
445 /* Number of bytes in a MIDI command */
446 #define MIDI_LENGTH(d) (midi_lengths[((d) >> 4) & 7])
447 #define MIDI_ACK 0xfe
448 #define MIDI_IS_STATUS(d) ((d) >= 0x80)
449 #define MIDI_IS_COMMON(d) ((d) >= 0xf0)
451 #define MIDI_SYSEX_START 0xF0
452 #define MIDI_SYSEX_END 0xF7
456 midi_in(struct snd_midi *m, MIDI_TYPE *buf, int size)
458 /* int i, sig, enq; */
461 /* MIDI_TYPE data; */
462 MIDI_DEBUG(5, printf("midi_in: m=%p size=%d\n", m, size));
467 if (!(m->flags & M_RX))
475 * Don't bother queuing if not in read mode. Discard everything and
476 * return size so the caller doesn't freak out.
479 if (!(m->flags & M_RX))
482 for (i = sig = 0; i < size; i++) {
486 if (data == MIDI_ACK)
489 switch (m->inq_state) {
491 if (MIDI_IS_STATUS(data)) {
493 case 0xf0: /* Sysex */
494 m->inq_state = MIDI_IN_SYSEX;
496 case 0xf1: /* MTC quarter frame */
497 case 0xf3: /* Song select */
498 m->inq_state = MIDI_IN_DATA;
502 case 0xf2: /* Song position pointer */
503 m->inq_state = MIDI_IN_DATA;
508 if (MIDI_IS_COMMON(data)) {
512 m->inq_state = MIDI_IN_DATA;
514 m->inq_status = data;
515 m->inq_left = MIDI_LENGTH(data);
519 } else if (MIDI_IS_STATUS(m->inq_status)) {
520 m->inq_state = MIDI_IN_DATA;
521 if (!MIDIQ_FULL(m->inq)) {
523 MIDIQ_ENQ(m->inq, &m->inq_status, 1);
526 m->inq_left = MIDI_LENGTH(m->inq_status) - 1;
530 * End of case MIDI_IN_START:
535 if (--m->inq_left <= 0)
536 sig = 1;/* deliver data */
539 if (data == MIDI_SYSEX_END)
540 m->inq_state = MIDI_IN_START;
545 if (!MIDIQ_FULL(m->inq)) {
546 MIDIQ_ENQ(m->inq, &data, 1);
550 * End of the state machines main "for loop"
555 MIDI_DEBUG(6, printf("midi_in: len %jd avail %jd\n",
556 (intmax_t)MIDIQ_LEN(m->inq),
557 (intmax_t)MIDIQ_AVAIL(m->inq)));
558 if (MIDIQ_AVAIL(m->inq) > size) {
560 MIDIQ_ENQ(m->inq, buf, size);
562 MIDI_DEBUG(4, printf("midi_in: Discarding data qu\n"));
563 mtx_unlock(&m->qlock);
573 kern_psignal(m->async, SIGIO);
574 PROC_UNLOCK(m->async);
579 mtx_unlock(&m->qlock);
584 * midi_out: The only clearer of the M_TXEN flag.
587 midi_out(struct snd_midi *m, MIDI_TYPE *buf, int size)
594 if (!(m->flags & M_TXEN))
597 MIDI_DEBUG(2, printf("midi_out: %p\n", m));
599 used = MIN(size, MIDIQ_LEN(m->outq));
600 MIDI_DEBUG(3, printf("midi_out: used %d\n", used));
602 MIDIQ_DEQ(m->outq, buf, used);
603 if (MIDIQ_EMPTY(m->outq)) {
605 MPU_CALLBACKP(m, m->cookie, m->flags);
607 if (used && MIDIQ_AVAIL(m->outq) > m->hiwat) {
615 kern_psignal(m->async, SIGIO);
616 PROC_UNLOCK(m->async);
619 mtx_unlock(&m->qlock);
625 * /dev/rmidi#.# device access functions
628 midi_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
630 struct snd_midi *m = i_dev->si_drv1;
633 MIDI_DEBUG(1, printf("midiopen %p %s %s\n", td,
634 flags & FREAD ? "M_RX" : "", flags & FWRITE ? "M_TX" : ""));
644 if (MIDIQ_SIZE(m->inq) == 0)
646 else if (m->flags & M_RX)
651 if (flags & FWRITE) {
652 if (MIDIQ_SIZE(m->outq) == 0)
654 else if (m->flags & M_TX)
666 m->flags |= M_RX | M_RXEN;
668 * Only clear the inq, the outq might still have data to drain
669 * from a previous session
677 MPU_CALLBACK(m, m->cookie, m->flags);
679 MIDI_DEBUG(2, printf("midi_open: opened.\n"));
681 err: mtx_unlock(&m->qlock);
682 mtx_unlock(&m->lock);
687 midi_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
689 struct snd_midi *m = i_dev->si_drv1;
693 MIDI_DEBUG(1, printf("midi_close %p %s %s\n", td,
694 flags & FREAD ? "M_RX" : "", flags & FWRITE ? "M_TX" : ""));
702 if ((flags & FREAD && !(m->flags & M_RX)) ||
703 (flags & FWRITE && !(m->flags & M_TX))) {
712 m->flags &= ~(M_RX | M_RXEN);
716 if ((m->flags & (M_TXEN | M_RXEN)) != (oldflags & (M_RXEN | M_TXEN)))
717 MPU_CALLBACK(m, m->cookie, m->flags);
719 MIDI_DEBUG(1, printf("midi_close: closed, busy = %d.\n", m->busy));
721 mtx_unlock(&m->qlock);
722 mtx_unlock(&m->lock);
728 * TODO: midi_read, per oss programmer's guide pg. 42 should return as soon
729 * as data is available.
732 midi_read(struct cdev *i_dev, struct uio *uio, int ioflag)
734 #define MIDI_RSIZE 32
735 struct snd_midi *m = i_dev->si_drv1;
738 char buf[MIDI_RSIZE];
740 MIDI_DEBUG(5, printf("midiread: count=%lu\n",
741 (unsigned long)uio->uio_resid));
751 if (!(m->flags & M_RX))
754 while (uio->uio_resid > 0) {
755 while (MIDIQ_EMPTY(m->inq)) {
756 retval = EWOULDBLOCK;
757 if (ioflag & O_NONBLOCK)
759 mtx_unlock(&m->lock);
761 retval = msleep(&m->rchan, &m->qlock,
762 PCATCH | PDROP, "midi RX", 0);
764 * We slept, maybe things have changed since last
769 if (m != i_dev->si_drv1)
771 /* if (retval && retval != ERESTART) */
780 MIDI_DEBUG(6, printf("midi_read start\n"));
782 * At this point, it is certain that m->inq has data
785 used = MIN(MIDIQ_LEN(m->inq), uio->uio_resid);
786 used = MIN(used, MIDI_RSIZE);
788 MIDI_DEBUG(6, printf("midiread: uiomove cc=%d\n", used));
789 MIDIQ_DEQ(m->inq, buf, used);
790 retval = uiomove(buf, used, uio);
796 * If we Made it here then transfer is good
799 err1: mtx_unlock(&m->qlock);
800 mtx_unlock(&m->lock);
801 err0: MIDI_DEBUG(4, printf("midi_read: ret %d\n", retval));
806 * midi_write: The only setter of M_TXEN
810 midi_write(struct cdev *i_dev, struct uio *uio, int ioflag)
812 #define MIDI_WSIZE 32
813 struct snd_midi *m = i_dev->si_drv1;
816 char buf[MIDI_WSIZE];
819 MIDI_DEBUG(4, printf("midi_write\n"));
827 if (!(m->flags & M_TX))
830 while (uio->uio_resid > 0) {
831 while (MIDIQ_AVAIL(m->outq) == 0) {
832 retval = EWOULDBLOCK;
833 if (ioflag & O_NONBLOCK)
835 mtx_unlock(&m->lock);
837 MIDI_DEBUG(3, printf("midi_write msleep\n"));
838 retval = msleep(&m->wchan, &m->qlock,
839 PCATCH | PDROP, "midi TX", 0);
841 * We slept, maybe things have changed since last
846 if (m != i_dev->si_drv1)
858 * We are certain than data can be placed on the queue
861 used = MIN(MIDIQ_AVAIL(m->outq), uio->uio_resid);
862 used = MIN(used, MIDI_WSIZE);
863 MIDI_DEBUG(5, printf("midiout: resid %zd len %jd avail %jd\n",
864 uio->uio_resid, (intmax_t)MIDIQ_LEN(m->outq),
865 (intmax_t)MIDIQ_AVAIL(m->outq)));
868 MIDI_DEBUG(5, printf("midi_write: uiomove cc=%d\n", used));
869 retval = uiomove(buf, used, uio);
872 MIDIQ_ENQ(m->outq, buf, used);
874 * Inform the bottom half that data can be written
876 if (!(m->flags & M_TXEN)) {
878 MPU_CALLBACK(m, m->cookie, m->flags);
882 * If we Made it here then transfer is good
885 err1: mtx_unlock(&m->qlock);
886 mtx_unlock(&m->lock);
891 midi_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
898 midi_poll(struct cdev *i_dev, int events, struct thread *td)
900 struct snd_midi *m = i_dev->si_drv1;
911 if (events & (POLLIN | POLLRDNORM))
912 if (!MIDIQ_EMPTY(m->inq))
913 events |= events & (POLLIN | POLLRDNORM);
915 if (events & (POLLOUT | POLLWRNORM))
916 if (MIDIQ_AVAIL(m->outq) < m->hiwat)
917 events |= events & (POLLOUT | POLLWRNORM);
920 if (events & (POLLIN | POLLRDNORM))
921 selrecord(td, &m->rsel);
923 if (events & (POLLOUT | POLLWRNORM))
924 selrecord(td, &m->wsel);
926 mtx_unlock(&m->lock);
927 mtx_unlock(&m->qlock);
933 * /dev/midistat device functions
937 midistat_open(struct cdev *i_dev, int flags, int mode, struct thread *td)
941 MIDI_DEBUG(1, printf("midistat_open\n"));
942 mtx_lock(&midistat_lock);
944 if (midistat_isopen) {
945 mtx_unlock(&midistat_lock);
949 mtx_unlock(&midistat_lock);
951 if (sbuf_new(&midistat_sbuf, NULL, 4096, SBUF_AUTOEXTEND) == NULL) {
953 mtx_lock(&midistat_lock);
956 mtx_lock(&midistat_lock);
958 error = (midistat_prepare(&midistat_sbuf) > 0) ? 0 : ENOMEM;
962 mtx_unlock(&midistat_lock);
967 midistat_close(struct cdev *i_dev, int flags, int mode, struct thread *td)
969 MIDI_DEBUG(1, printf("midistat_close\n"));
970 mtx_lock(&midistat_lock);
971 if (!midistat_isopen) {
972 mtx_unlock(&midistat_lock);
975 sbuf_delete(&midistat_sbuf);
978 mtx_unlock(&midistat_lock);
983 midistat_read(struct cdev *i_dev, struct uio *buf, int flag)
987 MIDI_DEBUG(4, printf("midistat_read\n"));
988 mtx_lock(&midistat_lock);
989 if (!midistat_isopen) {
990 mtx_unlock(&midistat_lock);
993 l = min(buf->uio_resid, sbuf_len(&midistat_sbuf) - midistat_bufptr);
996 mtx_unlock(&midistat_lock);
997 err = uiomove(sbuf_data(&midistat_sbuf) + midistat_bufptr, l,
999 mtx_lock(&midistat_lock);
1002 midistat_bufptr += l;
1003 mtx_unlock(&midistat_lock);
1008 * Module library functions
1012 midistat_prepare(struct sbuf *s)
1016 mtx_assert(&midistat_lock, MA_OWNED);
1018 sbuf_printf(s, "FreeBSD Midi Driver (midi2)\n");
1019 if (TAILQ_EMPTY(&midi_devs)) {
1020 sbuf_printf(s, "No devices installed.\n");
1024 sbuf_printf(s, "Installed devices:\n");
1026 TAILQ_FOREACH(m, &midi_devs, link) {
1028 sbuf_printf(s, "%s [%d/%d:%s]", m->name, m->unit, m->channel,
1029 MPU_PROVIDER(m, m->cookie));
1030 sbuf_printf(s, "%s", MPU_DESCR(m, m->cookie, midistat_verbose));
1031 sbuf_printf(s, "\n");
1032 mtx_unlock(&m->lock);
1041 * Convert IOCTL command to string for debugging
1045 midi_cmdname(int cmd)
1050 } *tab, cmdtab_midiioctl[] = {
1051 #define A(x) {x, ## x}
1053 * Once we have some real IOCTLs define, the following will
1056 * A(SNDCTL_MIDI_PRETIME), A(SNDCTL_MIDI_MPUMODE),
1057 * A(SNDCTL_MIDI_MPUCMD), A(SNDCTL_SYNTH_INFO),
1058 * A(SNDCTL_MIDI_INFO), A(SNDCTL_SYNTH_MEMAVL),
1059 * A(SNDCTL_FM_LOAD_INSTR), A(SNDCTL_FM_4OP_ENABLE),
1060 * A(MIOSPASSTHRU), A(MIOGPASSTHRU), A(AIONWRITE),
1061 * A(AIOGSIZE), A(AIOSSIZE), A(AIOGFMT), A(AIOSFMT),
1062 * A(AIOGMIX), A(AIOSMIX), A(AIOSTOP), A(AIOSYNC),
1071 for (tab = cmdtab_midiioctl; tab->cmd != cmd && tab->cmd != -1; tab++);
1083 midisynth_open(void *n, void *arg, int flags)
1085 struct snd_midi *m = ((struct synth_midi *)n)->m;
1088 MIDI_DEBUG(1, printf("midisynth_open %s %s\n",
1089 flags & FREAD ? "M_RX" : "", flags & FWRITE ? "M_TX" : ""));
1095 mtx_lock(&m->qlock);
1099 if (flags & FREAD) {
1100 if (MIDIQ_SIZE(m->inq) == 0)
1102 else if (m->flags & M_RX)
1107 if (flags & FWRITE) {
1108 if (MIDIQ_SIZE(m->outq) == 0)
1110 else if (m->flags & M_TX)
1118 * TODO: Consider m->async = 0;
1121 if (flags & FREAD) {
1122 m->flags |= M_RX | M_RXEN;
1124 * Only clear the inq, the outq might still have data to drain
1125 * from a previous session
1127 MIDIQ_CLEAR(m->inq);
1131 if (flags & FWRITE) {
1135 m->synth_flags = flags & (FREAD | FWRITE);
1137 MPU_CALLBACK(m, m->cookie, m->flags);
1140 err: mtx_unlock(&m->qlock);
1141 mtx_unlock(&m->lock);
1142 MIDI_DEBUG(2, printf("midisynth_open: return %d.\n", retval));
1147 midisynth_close(void *n)
1149 struct snd_midi *m = ((struct synth_midi *)n)->m;
1153 MIDI_DEBUG(1, printf("midisynth_close %s %s\n",
1154 m->synth_flags & FREAD ? "M_RX" : "",
1155 m->synth_flags & FWRITE ? "M_TX" : ""));
1161 mtx_lock(&m->qlock);
1163 if ((m->synth_flags & FREAD && !(m->flags & M_RX)) ||
1164 (m->synth_flags & FWRITE && !(m->flags & M_TX))) {
1170 oldflags = m->flags;
1172 if (m->synth_flags & FREAD)
1173 m->flags &= ~(M_RX | M_RXEN);
1174 if (m->synth_flags & FWRITE)
1177 if ((m->flags & (M_TXEN | M_RXEN)) != (oldflags & (M_RXEN | M_TXEN)))
1178 MPU_CALLBACK(m, m->cookie, m->flags);
1180 MIDI_DEBUG(1, printf("midi_close: closed, busy = %d.\n", m->busy));
1182 mtx_unlock(&m->qlock);
1183 mtx_unlock(&m->lock);
1193 midisynth_writeraw(void *n, uint8_t *buf, size_t len)
1195 struct snd_midi *m = ((struct synth_midi *)n)->m;
1200 MIDI_DEBUG(4, printf("midisynth_writeraw\n"));
1208 mtx_lock(&m->qlock);
1210 if (!(m->flags & M_TX))
1214 printf("midi dump: ");
1217 while (MIDIQ_AVAIL(m->outq) == 0) {
1218 if (!(m->flags & M_TXEN)) {
1220 MPU_CALLBACK(m, m->cookie, m->flags);
1222 mtx_unlock(&m->lock);
1224 MIDI_DEBUG(3, printf("midisynth_writeraw msleep\n"));
1225 retval = msleep(&m->wchan, &m->qlock,
1226 PCATCH | PDROP, "midi TX", 0);
1228 * We slept, maybe things have changed since last
1231 if (retval == EINTR)
1237 mtx_lock(&m->qlock);
1244 * We are certain than data can be placed on the queue
1247 used = MIN(MIDIQ_AVAIL(m->outq), len);
1248 used = MIN(used, MIDI_WSIZE);
1250 printf("midi_synth: resid %zu len %jd avail %jd\n",
1251 len, (intmax_t)MIDIQ_LEN(m->outq),
1252 (intmax_t)MIDIQ_AVAIL(m->outq)));
1255 for (i = 0; i < used; i++)
1256 printf("%x ", buf[i]);
1258 MIDIQ_ENQ(m->outq, buf, used);
1262 * Inform the bottom half that data can be written
1264 if (!(m->flags & M_TXEN)) {
1266 MPU_CALLBACK(m, m->cookie, m->flags);
1270 * If we Made it here then transfer is good
1276 err1: mtx_unlock(&m->qlock);
1277 mtx_unlock(&m->lock);
1278 err0: return retval;
1282 midisynth_killnote(void *n, uint8_t chn, uint8_t note, uint8_t vel)
1287 if (note > 127 || chn > 15)
1294 c[0] = 0x90 | (chn & 0x0f); /* Note on. */
1295 c[1] = (u_char)note;
1298 c[0] = 0x80 | (chn & 0x0f); /* Note off. */
1299 c[1] = (u_char)note;
1303 return midisynth_writeraw(n, c, 3);
1307 midisynth_setinstr(void *n, uint8_t chn, uint16_t instr)
1311 if (instr > 127 || chn > 15)
1314 c[0] = 0xc0 | (chn & 0x0f); /* Progamme change. */
1315 c[1] = instr + midi_instroff;
1317 return midisynth_writeraw(n, c, 2);
1321 midisynth_startnote(void *n, uint8_t chn, uint8_t note, uint8_t vel)
1325 if (note > 127 || chn > 15)
1331 c[0] = 0x90 | (chn & 0x0f); /* Note on. */
1332 c[1] = (u_char)note;
1335 return midisynth_writeraw(n, c, 3);
1338 midisynth_alloc(void *n, uint8_t chan, uint8_t note)
1344 midisynth_controller(void *n, uint8_t chn, uint8_t ctrlnum, uint16_t val)
1348 if (ctrlnum > 127 || chn > 15)
1351 c[0] = 0xb0 | (chn & 0x0f); /* Control Message. */
1354 return midisynth_writeraw(n, c, 3);
1358 midisynth_bender(void *n, uint8_t chn, uint16_t val)
1363 if (val > 16383 || chn > 15)
1366 c[0] = 0xe0 | (chn & 0x0f); /* Pitch bend. */
1367 c[1] = (u_char)val & 0x7f;
1368 c[2] = (u_char)(val >> 7) & 0x7f;
1370 return midisynth_writeraw(n, c, 3);
1374 * Single point of midi destructions.
1377 midi_destroy(struct snd_midi *m, int midiuninit)
1380 mtx_assert(&midistat_lock, MA_OWNED);
1381 mtx_assert(&m->lock, MA_OWNED);
1383 MIDI_DEBUG(3, printf("midi_destroy\n"));
1384 m->dev->si_drv1 = NULL;
1385 mtx_unlock(&m->lock); /* XXX */
1386 destroy_dev(m->dev);
1387 TAILQ_REMOVE(&midi_devs, m, link);
1389 MPU_UNINIT(m, m->cookie);
1390 free(MIDIQ_BUF(m->inq), M_MIDI);
1391 free(MIDIQ_BUF(m->outq), M_MIDI);
1392 mtx_destroy(&m->qlock);
1393 mtx_destroy(&m->lock);
1394 free(m->synth, M_MIDI);
1400 * Load and unload functions, creates the /dev/midistat device
1406 mtx_init(&midistat_lock, "midistat lock", NULL, 0);
1407 TAILQ_INIT(&midi_devs); /* Initialize the queue. */
1409 midistat_dev = make_dev(&midistat_cdevsw,
1410 MIDIMKMINOR(0, MIDI_DEV_MIDICTL, 0),
1411 UID_ROOT, GID_WHEEL, 0666, "midistat");
1422 MIDI_DEBUG(1, printf("midi_unload()\n"));
1424 mtx_lock(&midistat_lock);
1425 if (midistat_isopen)
1428 TAILQ_FOREACH(m, &midi_devs, link) {
1433 retval = midi_destroy(m, 1);
1438 mtx_unlock(&midistat_lock); /* XXX */
1440 destroy_dev(midistat_dev);
1442 * Made it here then unload is complete
1444 mtx_destroy(&midistat_lock);
1448 mtx_unlock(&m->lock);
1450 mtx_unlock(&midistat_lock);
1452 MIDI_DEBUG(2, printf("midi_unload: failed\n"));
1456 extern int seq_modevent(module_t mod, int type, void *data);
1459 midi_modevent(module_t mod, int type, void *data)
1467 retval = midi_load();
1470 retval = seq_modevent(mod, type, data);
1475 retval = midi_unload();
1478 retval = seq_modevent(mod, type, data);
1490 midimapper_addseq(void *arg1, int *unit, void **cookie)
1494 return (kobj_t)arg1;
1498 midimapper_open(void *arg1, void **cookie)
1503 mtx_lock(&midistat_lock);
1505 TAILQ_FOREACH(m, &midi_devs, link) {
1509 mtx_unlock(&midistat_lock);
1514 midimapper_close(void *arg1, void *cookie)
1520 midimapper_fetch_synth(void *arg, void *cookie, int unit)
1525 mtx_lock(&midistat_lock);
1527 TAILQ_FOREACH(m, &midi_devs, link) {
1528 if (unit == retval) {
1529 mtx_unlock(&midistat_lock);
1530 return (kobj_t)m->synth;
1535 mtx_unlock(&midistat_lock);
1539 DEV_MODULE(midi, midi_modevent, NULL);
1540 MODULE_VERSION(midi, 1);