c9a37a6cea
hw.midi.debug and hw.midi.seq.debug to 1 to enable debug log. - Make debug messages human-frendly. - Implement /dev/music. - Add a timer engine required by /dev/music. - Fix nonblocking I/O. - Fix the numbering of midi and synth devices.
1058 lines
25 KiB
C
1058 lines
25 KiB
C
/*
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* Main midi driver for FreeBSD. This file provides the main
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* entry points for probe/attach and all i/o demultiplexing, including
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* default routines for generic devices.
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*
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* (C) 1999 Seigo Tanimura
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS
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* IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* For each card type a template "mididev_info" structure contains
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* all the relevant parameters, both for configuration and runtime.
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*
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* In this file we build tables of pointers to the descriptors for
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* the various supported cards. The generic probe routine scans
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* the table(s) looking for a matching entry, then invokes the
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* board-specific probe routine. If successful, a pointer to the
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* correct mididev_info is stored in mididev_last_probed, for subsequent
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* use in the attach routine. The generic attach routine copies
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* the template to a permanent descriptor (midi_info and
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* friends), initializes all generic parameters, and calls the
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* board-specific attach routine.
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*
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* On device calls, the generic routines do the checks on unit and
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* device parameters, then call the board-specific routines if
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* available, or try to perform the task using the default code.
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*
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* $FreeBSD$
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*
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*/
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#include <dev/sound/midi/midi.h>
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static devclass_t midi_devclass;
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static d_open_t midiopen;
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static d_close_t midiclose;
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static d_ioctl_t midiioctl;
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static d_read_t midiread;
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static d_write_t midiwrite;
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static d_poll_t midipoll;
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/* These functions are local. */
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static d_open_t midistat_open;
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static d_close_t midistat_close;
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static d_read_t midistat_read;
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static int midi_initstatus(char *buf, int size);
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static int midi_readstatus(char *buf, int *ptr, struct uio *uio);
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#define CDEV_MAJOR MIDI_CDEV_MAJOR
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static struct cdevsw midi_cdevsw = {
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/* open */ midiopen,
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/* close */ midiclose,
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/* read */ midiread,
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/* write */ midiwrite,
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/* ioctl */ midiioctl,
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/* poll */ midipoll,
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/* mmap */ nommap,
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/* strategy */ nostrategy,
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/* name */ "midi",
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/* maj */ CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ 0,
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};
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/*
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* descriptors for active devices. also used as the public softc
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* of a device.
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*/
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static TAILQ_HEAD(,_mididev_info) midi_info;
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static int nmidi, nsynth;
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/* Mutex to protect midi_info, nmidi and nsynth. */
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static struct mtx midiinfo_mtx;
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static int midiinfo_mtx_init;
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/* These make the buffer for /dev/midistat */
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static int midistatbusy;
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static char midistatbuf[4096];
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static int midistatptr;
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SYSCTL_NODE(_hw, OID_AUTO, midi, CTLFLAG_RD, 0, "Midi driver");
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int midi_debug;
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SYSCTL_INT(_hw_midi, OID_AUTO, debug, CTLFLAG_RW, &midi_debug, 0, "");
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midi_cmdtab cmdtab_midiioctl[] = {
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{SNDCTL_MIDI_PRETIME, "SNDCTL_MIDI_PRETIME"},
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{SNDCTL_MIDI_MPUMODE, "SNDCTL_MIDI_MPUMODE"},
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{SNDCTL_MIDI_MPUCMD, "SNDCTL_MIDI_MPUCMD"},
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{SNDCTL_SYNTH_INFO, "SNDCTL_SYNTH_INFO"},
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{SNDCTL_MIDI_INFO, "SNDCTL_MIDI_INFO"},
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{SNDCTL_SYNTH_MEMAVL, "SNDCTL_SYNTH_MEMAVL"},
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{SNDCTL_FM_LOAD_INSTR, "SNDCTL_FM_LOAD_INSTR"},
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{SNDCTL_FM_4OP_ENABLE, "SNDCTL_FM_4OP_ENABLE"},
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{MIOSPASSTHRU, "MIOSPASSTHRU"},
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{MIOGPASSTHRU, "MIOGPASSTHRU"},
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{AIONWRITE, "AIONWRITE"},
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{AIOGSIZE, "AIOGSIZE"},
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{AIOSSIZE, "AIOSSIZE"},
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{AIOGFMT, "AIOGFMT"},
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{AIOSFMT, "AIOSFMT"},
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{AIOGMIX, "AIOGMIX"},
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{AIOSMIX, "AIOSMIX"},
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{AIOSTOP, "AIOSTOP"},
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{AIOSYNC, "AIOSYNC"},
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{AIOGCAP, "AIOGCAP"},
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{-1, NULL},
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};
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/*
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* This is the generic init routine.
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* Must be called after device-specific init.
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*/
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int
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midiinit(mididev_info *d, device_t dev)
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{
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int unit;
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/*
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* initialize standard parameters for the device. This can be
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* overridden by device-specific configurations but better do
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* here the generic things.
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*/
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MIDI_DEBUG(printf("midiinit: unit %d.\n", d->unit));
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unit = d->unit;
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d->softc = device_get_softc(dev);
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d->dev = dev;
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d->magic = MAGIC(d->unit); /* debugging... */
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d->flags = 0;
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d->fflags = 0;
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d->midi_dbuf_in.unit_size = 1;
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d->midi_dbuf_out.unit_size = 1;
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d->midi_dbuf_passthru.unit_size = 1;
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mtx_unlock(&d->flagqueue_mtx);
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if (midi_devclass == NULL) {
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midi_devclass = device_get_devclass(dev);
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make_dev(&midi_cdevsw, MIDIMKMINOR(0, MIDI_DEV_STATUS),
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UID_ROOT, GID_WHEEL, 0444, "midistat");
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}
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make_dev(&midi_cdevsw, MIDIMKMINOR(unit, MIDI_DEV_MIDIN),
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UID_ROOT, GID_WHEEL, 0666, "midi%d", unit);
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return 0 ;
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}
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/*
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* a small utility function which, given a device number, returns
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* a pointer to the associated mididev_info struct, and sets the unit
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* number.
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*/
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mididev_info *
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get_mididev_info(dev_t i_dev, int *unit)
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{
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int u;
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if (MIDIDEV(i_dev) != MIDI_DEV_MIDIN)
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return NULL;
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u = MIDIUNIT(i_dev);
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if (unit)
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*unit = u;
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return get_mididev_info_unit(u);
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}
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/*
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* a small utility function which, given a unit number, returns
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* a pointer to the associated mididev_info struct.
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*/
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mididev_info *
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get_mididev_info_unit(int unit)
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{
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mididev_info *md;
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/* XXX */
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if (!midiinfo_mtx_init) {
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midiinfo_mtx_init = 1;
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mtx_init(&midiinfo_mtx, "midinf", MTX_DEF);
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TAILQ_INIT(&midi_info);
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}
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mtx_lock(&midiinfo_mtx);
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TAILQ_FOREACH(md, &midi_info, md_link) {
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if (md->unit == unit)
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break;
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}
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mtx_unlock(&midiinfo_mtx);
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return md;
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}
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/*
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* a small utility function which, given a unit number, returns
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* a pointer to the associated mididev_info struct with MDT_MIDI.
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*/
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mididev_info *
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get_mididev_midi_unit(int unit)
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{
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mididev_info *md;
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/* XXX */
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if (!midiinfo_mtx_init) {
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midiinfo_mtx_init = 1;
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mtx_init(&midiinfo_mtx, "midinf", MTX_DEF);
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TAILQ_INIT(&midi_info);
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}
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mtx_lock(&midiinfo_mtx);
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TAILQ_FOREACH(md, &midi_info, md_link) {
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if (md->midiunit == unit)
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break;
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}
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mtx_unlock(&midiinfo_mtx);
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return md;
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}
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/*
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* a small utility function which, given a unit number, returns
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* a pointer to the associated mididev_info struct with MDT_SYNTH.
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*/
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mididev_info *
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get_mididev_synth_unit(int unit)
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{
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mididev_info *md;
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/* XXX */
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if (!midiinfo_mtx_init) {
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midiinfo_mtx_init = 1;
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mtx_init(&midiinfo_mtx, "midinf", MTX_DEF);
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TAILQ_INIT(&midi_info);
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}
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mtx_lock(&midiinfo_mtx);
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TAILQ_FOREACH(md, &midi_info, md_link) {
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if (md->synthunit == unit)
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break;
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}
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mtx_unlock(&midiinfo_mtx);
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return md;
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}
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/* Create a new midi device info structure. */
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/* TODO: lock md, then exit. */
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mididev_info *
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create_mididev_info_unit(int type, mididev_info *mdinf, synthdev_info *syninf)
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{
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int unit;
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mididev_info *md, *mdnew;
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/* XXX */
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if (!midiinfo_mtx_init) {
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midiinfo_mtx_init = 1;
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mtx_init(&midiinfo_mtx, "midinf", MTX_DEF);
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TAILQ_INIT(&midi_info);
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}
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/* As malloc(9) might block, allocate mididev_info now. */
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mdnew = malloc(sizeof(mididev_info), M_DEVBUF, M_WAITOK | M_ZERO);
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if (mdnew == NULL)
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return NULL;
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bcopy(mdinf, mdnew, sizeof(mididev_info));
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bcopy(syninf, &mdnew->synth, sizeof(synthdev_info));
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midibuf_init(&mdnew->midi_dbuf_in);
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midibuf_init(&mdnew->midi_dbuf_out);
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midibuf_init(&mdnew->midi_dbuf_passthru);
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mtx_init(&mdnew->flagqueue_mtx, "midflq", MTX_DEF);
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mtx_init(&mdnew->synth.vc_mtx, "synsvc", MTX_DEF);
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mtx_init(&mdnew->synth.status_mtx, "synsst", MTX_DEF);
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mtx_lock(&midiinfo_mtx);
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switch (type) {
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case MDT_MIDI:
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mdnew->midiunit = nmidi;
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mdnew->synthunit = nmidi;
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nmidi++;
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break;
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case MDT_SYNTH:
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mdnew->midiunit = -1;
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mdnew->synthunit = nsynth;
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nsynth++;
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break;
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default:
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mtx_unlock(&midiinfo_mtx);
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midibuf_destroy(&mdnew->midi_dbuf_in);
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midibuf_destroy(&mdnew->midi_dbuf_out);
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midibuf_destroy(&mdnew->midi_dbuf_passthru);
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mtx_destroy(&mdnew->flagqueue_mtx);
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mtx_destroy(&mdnew->synth.vc_mtx);
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mtx_destroy(&mdnew->synth.status_mtx);
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free(mdnew, M_DEVBUF);
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panic("unsupported device type");
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return NULL;
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}
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mdnew->mdtype = type;
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for (unit = 0 ; ; unit++) {
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TAILQ_FOREACH(md, &midi_info, md_link) {
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if (md->unit == unit)
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break;
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}
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if (md == NULL)
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break;
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}
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mdnew->unit = unit;
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mtx_lock(&mdnew->flagqueue_mtx);
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TAILQ_INSERT_TAIL(&midi_info, mdnew, md_link);
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mtx_unlock(&midiinfo_mtx);
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return mdnew;
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}
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/* Return the number of configured devices. */
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int
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mididev_info_number(void)
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{
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return nmidi + nsynth;
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}
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/* Return the number of configured midi devices. */
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int
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mididev_midi_number(void)
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{
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return nmidi;
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}
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/* Return the number of configured synth devices. */
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int
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mididev_synth_number(void)
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{
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return nsynth;
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}
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/*
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* here are the switches for the main functions. The switches do
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* all necessary checks on the device number to make sure
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* that the device is configured. They also provide some default
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* functionalities so that device-specific drivers have to deal
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* only with special cases.
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*/
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static int
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midiopen(dev_t i_dev, int flags, int mode, struct thread *td)
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{
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int ret;
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switch (MIDIDEV(i_dev)) {
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case MIDI_DEV_MIDIN:
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ret = midi_open(i_dev, flags, mode, td);
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break;
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case MIDI_DEV_STATUS:
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ret = midistat_open(i_dev, flags, mode, td);
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break;
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default:
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ret = ENXIO;
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break;
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}
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|
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return (ret);
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}
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|
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static int
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midiclose(dev_t i_dev, int flags, int mode, struct thread *td)
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{
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int ret;
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|
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switch (MIDIDEV(i_dev)) {
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case MIDI_DEV_MIDIN:
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ret = midi_close(i_dev, flags, mode, td);
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break;
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case MIDI_DEV_STATUS:
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ret = midistat_close(i_dev, flags, mode, td);
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break;
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default:
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ret = ENXIO;
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break;
|
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}
|
|
|
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return (ret);
|
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}
|
|
|
|
static int
|
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midiread(dev_t i_dev, struct uio * buf, int flag)
|
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{
|
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int ret;
|
|
|
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switch (MIDIDEV(i_dev)) {
|
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case MIDI_DEV_MIDIN:
|
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ret = midi_read(i_dev, buf, flag);
|
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break;
|
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case MIDI_DEV_STATUS:
|
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ret = midistat_read(i_dev, buf, flag);
|
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break;
|
|
default:
|
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ret = ENXIO;
|
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break;
|
|
}
|
|
|
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return (ret);
|
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}
|
|
|
|
static int
|
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midiwrite(dev_t i_dev, struct uio * buf, int flag)
|
|
{
|
|
int ret;
|
|
|
|
switch (MIDIDEV(i_dev)) {
|
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case MIDI_DEV_MIDIN:
|
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ret = midi_write(i_dev, buf, flag);
|
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break;
|
|
default:
|
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ret = ENXIO;
|
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break;
|
|
}
|
|
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
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midiioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td)
|
|
{
|
|
int ret;
|
|
|
|
switch (MIDIDEV(i_dev)) {
|
|
case MIDI_DEV_MIDIN:
|
|
ret = midi_ioctl(i_dev, cmd, arg, mode, td);
|
|
break;
|
|
default:
|
|
ret = ENXIO;
|
|
break;
|
|
}
|
|
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
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midipoll(dev_t i_dev, int events, struct thread *td)
|
|
{
|
|
int ret;
|
|
|
|
switch (MIDIDEV(i_dev)) {
|
|
case MIDI_DEV_MIDIN:
|
|
ret = midi_poll(i_dev, events, td);
|
|
break;
|
|
default:
|
|
ret = ENXIO;
|
|
break;
|
|
}
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Followings are the generic methods in midi drivers.
|
|
*/
|
|
|
|
int
|
|
midi_open(dev_t i_dev, int flags, int mode, struct thread *td)
|
|
{
|
|
int dev, unit, ret;
|
|
mididev_info *d;
|
|
|
|
dev = minor(i_dev);
|
|
d = get_mididev_info(i_dev, &unit);
|
|
|
|
MIDI_DEBUG(printf("midi_open: unit %d, flags 0x%x.\n", unit, flags));
|
|
|
|
if (d == NULL)
|
|
return (ENXIO);
|
|
|
|
/* Mark this device busy. */
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
device_busy(d->dev);
|
|
if ((d->flags & MIDI_F_BUSY) != 0) {
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
printf("midi_open: unit %d is busy.\n", unit);
|
|
return (EBUSY);
|
|
}
|
|
d->fflags = flags;
|
|
d->flags |= MIDI_F_BUSY;
|
|
d->flags &= ~(MIDI_F_READING | MIDI_F_WRITING);
|
|
if ((d->fflags & O_NONBLOCK) != 0)
|
|
d->flags |= MIDI_F_NBIO;
|
|
|
|
/* Init the queue. */
|
|
if ((flags & FREAD) != 0)
|
|
midibuf_clear(&d->midi_dbuf_in);
|
|
if ((flags & FWRITE) != 0) {
|
|
midibuf_clear(&d->midi_dbuf_out);
|
|
midibuf_clear(&d->midi_dbuf_passthru);
|
|
}
|
|
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
|
|
if (d->open == NULL)
|
|
ret = 0;
|
|
else
|
|
ret = d->open(i_dev, flags, mode, td);
|
|
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
|
|
/* Begin recording if nonblocking. */
|
|
if ((d->flags & (MIDI_F_READING | MIDI_F_NBIO)) == MIDI_F_NBIO && (d->fflags & FREAD) != 0)
|
|
d->callback(d, MIDI_CB_START | MIDI_CB_RD);
|
|
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
|
|
MIDI_DEBUG(printf("midi_open: opened.\n"));
|
|
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
midi_close(dev_t i_dev, int flags, int mode, struct thread *td)
|
|
{
|
|
int dev, unit, ret;
|
|
mididev_info *d;
|
|
|
|
dev = minor(i_dev);
|
|
d = get_mididev_info(i_dev, &unit);
|
|
|
|
MIDI_DEBUG(printf("midi_close: unit %d.\n", unit));
|
|
|
|
if (d == NULL)
|
|
return (ENXIO);
|
|
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
|
|
/* Stop recording and playing. */
|
|
if ((d->flags & MIDI_F_READING) != 0)
|
|
d->callback(d, MIDI_CB_ABORT | MIDI_CB_RD);
|
|
if ((d->flags & MIDI_F_WRITING) != 0)
|
|
d->callback(d, MIDI_CB_ABORT | MIDI_CB_WR);
|
|
|
|
/* Clear the queues. */
|
|
if ((d->fflags & FREAD) != 0)
|
|
midibuf_clear(&d->midi_dbuf_in);
|
|
if ((d->fflags & FWRITE) != 0) {
|
|
midibuf_clear(&d->midi_dbuf_out);
|
|
midibuf_clear(&d->midi_dbuf_passthru);
|
|
}
|
|
|
|
/* Stop playing and unmark this device busy. */
|
|
d->flags &= ~MIDI_F_BUSY;
|
|
d->fflags = 0;
|
|
|
|
device_unbusy(d->dev);
|
|
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
|
|
if (d->close == NULL)
|
|
ret = 0;
|
|
else
|
|
ret = d->close(i_dev, flags, mode, td);
|
|
|
|
MIDI_DEBUG(printf("midi_close: closed.\n"));
|
|
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
midi_read(dev_t i_dev, struct uio * buf, int flag)
|
|
{
|
|
int dev, unit, len, lenr, ret;
|
|
mididev_info *d ;
|
|
u_char *uiobuf;
|
|
|
|
dev = minor(i_dev);
|
|
|
|
d = get_mididev_info(i_dev, &unit);
|
|
MIDI_DEBUG(printf("midi_read: unit %d, resid %d.\n", unit, buf->uio_resid));
|
|
|
|
if (d == NULL)
|
|
return (ENXIO);
|
|
|
|
ret = 0;
|
|
|
|
len = buf->uio_resid;
|
|
lenr = 0;
|
|
|
|
uiobuf = (u_char *)malloc(len, M_DEVBUF, M_WAITOK | M_ZERO);
|
|
if (uiobuf == NULL)
|
|
return (ENOMEM);
|
|
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
|
|
/* Begin recording. */
|
|
d->callback(d, MIDI_CB_START | MIDI_CB_RD);
|
|
|
|
/* Have we got the data to read? */
|
|
if ((d->flags & MIDI_F_NBIO) != 0 && d->midi_dbuf_in.rl == 0)
|
|
ret = EAGAIN;
|
|
else {
|
|
if ((d->flags & MIDI_F_NBIO) != 0 && len > d->midi_dbuf_in.rl)
|
|
len = d->midi_dbuf_in.rl;
|
|
ret = midibuf_seqread(&d->midi_dbuf_in, uiobuf, len, &lenr,
|
|
d->callback, d, MIDI_CB_START | MIDI_CB_RD,
|
|
&d->flagqueue_mtx);
|
|
}
|
|
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
|
|
if (lenr > 0)
|
|
ret = uiomove(uiobuf, lenr, buf);
|
|
|
|
free(uiobuf, M_DEVBUF);
|
|
|
|
MIDI_DEBUG(printf("midi_read: ret %d, resid %d.\n", ret, buf->uio_resid));
|
|
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
midi_write(dev_t i_dev, struct uio * buf, int flag)
|
|
{
|
|
int dev, unit, len, len2, lenw, ret;
|
|
mididev_info *d;
|
|
u_char *uiobuf;
|
|
|
|
dev = minor(i_dev);
|
|
d = get_mididev_info(i_dev, &unit);
|
|
|
|
MIDI_DEBUG(printf("midi_write: unit %d.\n", unit));
|
|
|
|
if (d == NULL)
|
|
return (ENXIO);
|
|
|
|
ret = 0;
|
|
|
|
len = buf->uio_resid;
|
|
lenw = 0;
|
|
|
|
uiobuf = (u_char *)malloc(len, M_DEVBUF, M_WAITOK | M_ZERO);
|
|
if (uiobuf == NULL)
|
|
return (ENOMEM);
|
|
|
|
ret = uiomove(uiobuf, len, buf);
|
|
if (ret != 0) {
|
|
free(uiobuf, M_DEVBUF);
|
|
return (ret);
|
|
}
|
|
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
|
|
/* Have we got the data to write? */
|
|
if ((d->flags & MIDI_F_NBIO) != 0 && d->midi_dbuf_out.fl == 0) {
|
|
/* Begin playing. */
|
|
d->callback(d, MIDI_CB_START | MIDI_CB_WR);
|
|
ret = EAGAIN;
|
|
} else {
|
|
len2 = len;
|
|
if ((d->flags & MIDI_F_NBIO) != 0 && len2 > d->midi_dbuf_out.fl)
|
|
len2 = d->midi_dbuf_out.fl;
|
|
ret = midibuf_seqwrite(&d->midi_dbuf_out, uiobuf, len2, &lenw,
|
|
d->callback, d, MIDI_CB_START | MIDI_CB_WR,
|
|
&d->flagqueue_mtx);
|
|
}
|
|
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
|
|
free(uiobuf, M_DEVBUF);
|
|
buf->uio_resid = len - lenw;
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* generic midi ioctl. Functions of the default driver can be
|
|
* overridden by the device-specific ioctl call.
|
|
* If a device-specific call returns ENOSYS (Function not implemented),
|
|
* the default driver is called. Otherwise, the returned value
|
|
* is passed up.
|
|
*
|
|
* The default handler, for many parameters, sets the value in the
|
|
* descriptor, sets MIDI_F_INIT, and calls the callback function with
|
|
* reason INIT. If successful, the callback returns 1 and the caller
|
|
* can update the parameter.
|
|
*/
|
|
|
|
int
|
|
midi_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td)
|
|
{
|
|
int ret = ENOSYS, dev, unit;
|
|
mididev_info *d;
|
|
struct snd_size *sndsize;
|
|
snd_sync_parm *sp;
|
|
|
|
dev = minor(i_dev);
|
|
d = get_mididev_info(i_dev, &unit);
|
|
|
|
if (d == NULL)
|
|
return (ENXIO);
|
|
|
|
if (d->ioctl)
|
|
ret = d->ioctl(i_dev, cmd, arg, mode, td);
|
|
if (ret != ENOSYS)
|
|
return ret;
|
|
|
|
/*
|
|
* pass control to the default ioctl handler. Set ret to 0 now.
|
|
*/
|
|
ret = 0;
|
|
|
|
MIDI_DEBUG(printf("midi_ioctl: unit %d, cmd %s.\n", unit, midi_cmdname(cmd, cmdtab_midiioctl)));
|
|
|
|
/*
|
|
* all routines are called with int. blocked. Make sure that
|
|
* ints are re-enabled when calling slow or blocking functions!
|
|
*/
|
|
switch(cmd) {
|
|
|
|
/*
|
|
* we start with the new ioctl interface.
|
|
*/
|
|
case AIONWRITE: /* how many bytes can write ? */
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
*(int *)arg = d->midi_dbuf_out.fl;
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
MIDI_DEBUG(printf("midi_ioctl: fl %d.\n", *(int *)arg));
|
|
break;
|
|
|
|
case AIOSSIZE: /* set the current blocksize */
|
|
sndsize = (struct snd_size *)arg;
|
|
MIDI_DEBUG(printf("midi_ioctl: play %d, rec %d.\n", sndsize->play_size, sndsize->rec_size));
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
if (sndsize->play_size <= d->midi_dbuf_out.unit_size && sndsize->rec_size <= d->midi_dbuf_in.unit_size) {
|
|
d->midi_dbuf_out.blocksize = d->midi_dbuf_out.unit_size;
|
|
d->midi_dbuf_in.blocksize = d->midi_dbuf_in.unit_size;
|
|
sndsize->play_size = d->midi_dbuf_out.blocksize;
|
|
sndsize->rec_size = d->midi_dbuf_in.blocksize;
|
|
d->flags &= ~MIDI_F_HAS_SIZE;
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
}
|
|
else {
|
|
if (sndsize->play_size > d->midi_dbuf_out.bufsize / 4)
|
|
sndsize->play_size = d->midi_dbuf_out.bufsize / 4;
|
|
if (sndsize->rec_size > d->midi_dbuf_in.bufsize / 4)
|
|
sndsize->rec_size = d->midi_dbuf_in.bufsize / 4;
|
|
/* Round up the size to the multiple of EV_SZ. */
|
|
d->midi_dbuf_out.blocksize =
|
|
((sndsize->play_size + d->midi_dbuf_out.unit_size - 1)
|
|
/ d->midi_dbuf_out.unit_size) * d->midi_dbuf_out.unit_size;
|
|
d->midi_dbuf_in.blocksize =
|
|
((sndsize->rec_size + d->midi_dbuf_in.unit_size - 1)
|
|
/ d->midi_dbuf_in.unit_size) * d->midi_dbuf_in.unit_size;
|
|
sndsize->play_size = d->midi_dbuf_out.blocksize;
|
|
sndsize->rec_size = d->midi_dbuf_in.blocksize;
|
|
d->flags |= MIDI_F_HAS_SIZE;
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
}
|
|
|
|
ret = 0;
|
|
break;
|
|
|
|
case AIOGSIZE: /* get the current blocksize */
|
|
sndsize = (struct snd_size *)arg;
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
sndsize->play_size = d->midi_dbuf_out.blocksize;
|
|
sndsize->rec_size = d->midi_dbuf_in.blocksize;
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
MIDI_DEBUG(printf("midi_ioctl: play %d, rec %d.\n", sndsize->play_size, sndsize->rec_size));
|
|
|
|
ret = 0;
|
|
break;
|
|
|
|
case AIOSTOP:
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
if (*(int *)arg == AIOSYNC_PLAY) /* play */
|
|
*(int *)arg = d->callback(d, MIDI_CB_STOP | MIDI_CB_WR);
|
|
else if (*(int *)arg == AIOSYNC_CAPTURE)
|
|
*(int *)arg = d->callback(d, MIDI_CB_STOP | MIDI_CB_RD);
|
|
else {
|
|
MIDI_DEBUG(printf("midi_ioctl: bad channel 0x%x.\n", *(int *)arg));
|
|
*(int *)arg = 0 ;
|
|
}
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
break ;
|
|
|
|
case AIOSYNC:
|
|
sp = (snd_sync_parm *)arg;
|
|
MIDI_DEBUG(printf("midi_ioctl: unimplemented, chan 0x%03lx pos %lu.\n",
|
|
sp->chan,
|
|
sp->pos));
|
|
break;
|
|
/*
|
|
* here follow the standard ioctls (filio.h etc.)
|
|
*/
|
|
case FIONREAD: /* get # bytes to read */
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
*(int *)arg = d->midi_dbuf_in.rl;
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
MIDI_DEBUG(printf("midi_ioctl: rl %d.\n", *(int *)arg));
|
|
break;
|
|
|
|
case FIOASYNC: /*set/clear async i/o */
|
|
MIDI_DEBUG(printf("FIOASYNC\n"));
|
|
break;
|
|
|
|
case FIONBIO: /* set/clear non-blocking i/o */
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
if (*(int *)arg == 0)
|
|
d->flags &= ~MIDI_F_NBIO ;
|
|
else
|
|
d->flags |= MIDI_F_NBIO ;
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
MIDI_DEBUG(printf("midi_ioctl: arg %d.\n", *(int *)arg));
|
|
break ;
|
|
|
|
case MIOSPASSTHRU: /* set/clear passthru */
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
if (*(int *)arg == 0)
|
|
d->flags &= ~MIDI_F_PASSTHRU ;
|
|
else
|
|
d->flags |= MIDI_F_PASSTHRU ;
|
|
|
|
/* Init the queue. */
|
|
midibuf_clear(&d->midi_dbuf_passthru);
|
|
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
MIDI_DEBUG(printf("midi_ioctl: passthru %d.\n", *(int *)arg));
|
|
|
|
/* FALLTHROUGH */
|
|
case MIOGPASSTHRU: /* get passthru */
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
if ((d->flags & MIDI_F_PASSTHRU) != 0)
|
|
*(int *)arg = 1;
|
|
else
|
|
*(int *)arg = 0;
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
MIDI_DEBUG(printf("midi_ioctl: passthru %d.\n", *(int *)arg));
|
|
break;
|
|
|
|
default:
|
|
MIDI_DEBUG(printf("midi_ioctl: default ioctl midi%d subdev %d fn 0x%08lx fail\n",
|
|
unit, dev & 0xf, cmd));
|
|
ret = EINVAL;
|
|
break ;
|
|
}
|
|
return ret ;
|
|
}
|
|
|
|
int
|
|
midi_poll(dev_t i_dev, int events, struct thread *td)
|
|
{
|
|
int unit, dev, ret, lim;
|
|
mididev_info *d;
|
|
|
|
dev = minor(i_dev);
|
|
d = get_mididev_info(i_dev, &unit);
|
|
|
|
MIDI_DEBUG(printf("midi_poll: unit %d.\n", unit));
|
|
|
|
if (d == NULL)
|
|
return (ENXIO);
|
|
|
|
ret = 0;
|
|
|
|
mtx_lock(&d->flagqueue_mtx);
|
|
|
|
/* Look up the apropriate queue and select it. */
|
|
if ((events & (POLLOUT | POLLWRNORM)) != 0) {
|
|
/* Start playing. */
|
|
d->callback(d, MIDI_CB_START | MIDI_CB_WR);
|
|
|
|
/* Find out the boundary. */
|
|
if ((d->flags & MIDI_F_HAS_SIZE) != 0)
|
|
lim = d->midi_dbuf_out.blocksize;
|
|
else
|
|
lim = d->midi_dbuf_out.unit_size;
|
|
if (d->midi_dbuf_out.fl < lim)
|
|
/* No enough space, record select. */
|
|
selrecord(td, &d->midi_dbuf_out.sel);
|
|
else
|
|
/* We can write now. */
|
|
ret |= events & (POLLOUT | POLLWRNORM);
|
|
}
|
|
if ((events & (POLLIN | POLLRDNORM)) != 0) {
|
|
/* Start recording. */
|
|
d->callback(d, MIDI_CB_START | MIDI_CB_RD);
|
|
|
|
/* Find out the boundary. */
|
|
if ((d->flags & MIDI_F_HAS_SIZE) != 0)
|
|
lim = d->midi_dbuf_in.blocksize;
|
|
else
|
|
lim = d->midi_dbuf_in.unit_size;
|
|
if (d->midi_dbuf_in.rl < lim)
|
|
/* No data ready, record select. */
|
|
selrecord(td, &d->midi_dbuf_in.sel);
|
|
else
|
|
/* We can write now. */
|
|
ret |= events & (POLLIN | POLLRDNORM);
|
|
}
|
|
|
|
mtx_unlock(&d->flagqueue_mtx);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
void
|
|
midi_intr(mididev_info *d)
|
|
{
|
|
if (d->intr != NULL)
|
|
d->intr(d->intrarg, d);
|
|
}
|
|
|
|
/* Flush the output queue. */
|
|
#define MIDI_SYNC_TIMEOUT 1
|
|
int
|
|
midi_sync(mididev_info *d)
|
|
{
|
|
int i, rl;
|
|
|
|
mtx_assert(&d->flagqueue_mtx, MA_OWNED);
|
|
|
|
MIDI_DEBUG(printf("midi_sync: unit %d.\n", d->unit));
|
|
|
|
while (d->midi_dbuf_out.rl > 0) {
|
|
if ((d->flags & MIDI_F_WRITING) == 0)
|
|
d->callback(d, MIDI_CB_START | MIDI_CB_WR);
|
|
rl = d->midi_dbuf_out.rl;
|
|
i = cv_timedwait_sig(&d->midi_dbuf_out.cv_out,
|
|
&d->flagqueue_mtx,
|
|
(d->midi_dbuf_out.bufsize * 10 * hz / 38400)
|
|
+ MIDI_SYNC_TIMEOUT * hz);
|
|
if (i == EINTR || i == ERESTART) {
|
|
if (i == EINTR)
|
|
d->callback(d, MIDI_CB_STOP | MIDI_CB_WR);
|
|
return (i);
|
|
}
|
|
if (i == EWOULDBLOCK && rl == d->midi_dbuf_out.rl) {
|
|
/* A queue seems to be stuck up. Give up and clear the queue. */
|
|
d->callback(d, MIDI_CB_STOP | MIDI_CB_WR);
|
|
midibuf_clear(&d->midi_dbuf_out);
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* These handle the status message of the midi drivers.
|
|
*/
|
|
|
|
int
|
|
midistat_open(dev_t i_dev, int flags, int mode, struct thread *td)
|
|
{
|
|
if (midistatbusy)
|
|
return (EBUSY);
|
|
|
|
bzero(midistatbuf, sizeof(midistatbuf));
|
|
midistatptr = 0;
|
|
if (midi_initstatus(midistatbuf, sizeof(midistatbuf) - 1))
|
|
return (ENOMEM);
|
|
|
|
midistatbusy = 1;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
midistat_close(dev_t i_dev, int flags, int mode, struct thread *td)
|
|
{
|
|
midistatbusy = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
midistat_read(dev_t i_dev, struct uio * buf, int flag)
|
|
{
|
|
return midi_readstatus(midistatbuf, &midistatptr, buf);
|
|
}
|
|
|
|
/*
|
|
* finally, some "libraries"
|
|
*/
|
|
|
|
/* Inits the buffer for /dev/midistat. */
|
|
static int
|
|
midi_initstatus(char *buf, int size)
|
|
{
|
|
int i, p;
|
|
device_t dev;
|
|
mididev_info *md;
|
|
|
|
p = 0;
|
|
p += snprintf(buf, size, "FreeBSD Midi Driver (newmidi) %s %s\nInstalled devices:\n", __DATE__, __TIME__);
|
|
for (i = 0 ; i < mididev_info_number() ; i++) {
|
|
md = get_mididev_info_unit(i);
|
|
if (!MIDICONFED(md))
|
|
continue;
|
|
dev = devclass_get_device(midi_devclass, i);
|
|
if (p < size)
|
|
p += snprintf(&buf[p], size - p, "midi%d: <%s> %s\n", i, device_get_desc(dev), md->midistat);
|
|
else
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* Reads the status message. */
|
|
static int
|
|
midi_readstatus(char *buf, int *ptr, struct uio *uio)
|
|
{
|
|
int len;
|
|
|
|
len = min(uio->uio_resid, strlen(&buf[*ptr]));
|
|
if (len > 0) {
|
|
uiomove(&buf[*ptr], len, uio);
|
|
*ptr += len;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
char
|
|
*midi_cmdname(int cmd, midi_cmdtab *tab)
|
|
{
|
|
while (tab->name != NULL) {
|
|
if (cmd == tab->cmd)
|
|
return (tab->name);
|
|
tab++;
|
|
}
|
|
|
|
return ("unknown");
|
|
}
|