db90128160
cloning infrastructure standard in kern_conf. Modules are now the same with or without devfs support. If you need to detect if devfs is present, in modules or elsewhere, check the integer variable "devfs_present". This happily removes an ugly hack from kern/vfs_conf.c. This forces a rename of the eventhandler and the standard clone helper function. Include <sys/eventhandler.h> in <sys/conf.h>: it's a helper #include like <sys/queue.h> Remove all #includes of opt_devfs.h they no longer matter.
701 lines
16 KiB
C
701 lines
16 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[unit] 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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/* bmaj */ -1
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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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mididev_info midi_info[NMIDI_MAX];
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u_long nmidi; /* total number of midi devices, filled in by the driver */
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u_long nsynth; /* total number of synthesizers, filled in by the driver */
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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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/*
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* This is the generic init routine
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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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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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unit = device_get_unit(dev);
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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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/*
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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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d->unit = device_get_unit(dev);
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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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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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mididev_info *d = NULL;
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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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if (u >= nmidi + nsynth) {
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DEB(printf("get_mididev_info: unit %d is not configured.\n", u));
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return NULL;
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}
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d = &midi_info[u];
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return d;
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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 proc * p)
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{
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switch (MIDIDEV(i_dev)) {
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case MIDI_DEV_MIDIN:
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return midi_open(i_dev, flags, mode, p);
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case MIDI_DEV_STATUS:
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return midistat_open(i_dev, flags, mode, p);
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}
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return (ENXIO);
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}
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static int
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midiclose(dev_t i_dev, int flags, int mode, struct proc * p)
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{
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switch (MIDIDEV(i_dev)) {
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case MIDI_DEV_MIDIN:
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return midi_close(i_dev, flags, mode, p);
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case MIDI_DEV_STATUS:
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return midistat_close(i_dev, flags, mode, p);
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}
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return (ENXIO);
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}
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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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switch (MIDIDEV(i_dev)) {
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case MIDI_DEV_MIDIN:
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return midi_read(i_dev, buf, flag);
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case MIDI_DEV_STATUS:
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return midistat_read(i_dev, buf, flag);
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}
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return (ENXIO);
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}
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static int
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midiwrite(dev_t i_dev, struct uio * buf, int flag)
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{
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switch (MIDIDEV(i_dev)) {
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case MIDI_DEV_MIDIN:
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return midi_write(i_dev, buf, flag);
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}
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return (ENXIO);
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}
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static int
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midiioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct proc * p)
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{
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switch (MIDIDEV(i_dev)) {
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case MIDI_DEV_MIDIN:
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return midi_ioctl(i_dev, cmd, arg, mode, p);
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}
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return (ENXIO);
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}
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static int
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midipoll(dev_t i_dev, int events, struct proc * p)
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{
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switch (MIDIDEV(i_dev)) {
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case MIDI_DEV_MIDIN:
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return midi_poll(i_dev, events, p);
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}
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return (ENXIO);
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}
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/*
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* Followings are the generic methods in midi drivers.
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*/
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int
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midi_open(dev_t i_dev, int flags, int mode, struct proc * p)
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{
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int dev, unit, s, ret;
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mididev_info *d;
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dev = minor(i_dev);
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d = get_mididev_info(i_dev, &unit);
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DEB(printf("open midi%d subdev %d flags 0x%08x mode 0x%08x\n",
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unit, dev & 0xf, flags, mode));
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if (d == NULL)
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return (ENXIO);
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s = splmidi();
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/* Mark this device busy. */
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device_busy(d->dev);
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if ((d->flags & MIDI_F_BUSY) != 0) {
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splx(s);
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DEB(printf("opl_open: unit %d is busy.\n", unit));
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return (EBUSY);
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}
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d->flags |= MIDI_F_BUSY;
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d->flags &= ~(MIDI_F_READING | MIDI_F_WRITING);
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d->fflags = flags;
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/* Init the queue. */
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if ((d->fflags & FREAD) != 0)
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midibuf_init(&d->midi_dbuf_in);
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if ((d->fflags & FWRITE) != 0) {
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midibuf_init(&d->midi_dbuf_out);
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midibuf_init(&d->midi_dbuf_passthru);
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}
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if (d->open == NULL)
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ret = 0;
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else
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ret = d->open(i_dev, flags, mode, p);
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splx(s);
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return (ret);
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}
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int
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midi_close(dev_t i_dev, int flags, int mode, struct proc * p)
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{
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int dev, unit, s, ret;
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mididev_info *d;
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dev = minor(i_dev);
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d = get_mididev_info(i_dev, &unit);
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DEB(printf("close midi%d subdev %d\n", unit, dev & 0xf));
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if (d == NULL)
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return (ENXIO);
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s = splmidi();
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/* Clear the queues. */
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if ((d->fflags & FREAD) != 0)
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midibuf_init(&d->midi_dbuf_in);
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if ((d->fflags & FWRITE) != 0) {
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midibuf_init(&d->midi_dbuf_out);
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midibuf_init(&d->midi_dbuf_passthru);
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}
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/* Stop playing and unmark this device busy. */
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d->flags &= ~MIDI_F_BUSY;
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d->fflags = 0;
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device_unbusy(d->dev);
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if (d->close == NULL)
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ret = 0;
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else
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ret = d->close(i_dev, flags, mode, p);
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splx(s);
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return (ret);
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}
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int
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midi_read(dev_t i_dev, struct uio * buf, int flag)
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{
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int dev, unit, s, len, ret;
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mididev_info *d ;
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dev = minor(i_dev);
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d = get_mididev_info(i_dev, &unit);
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DEB(printf("read midi%d subdev %d flag 0x%08x\n", unit, dev & 0xf, flag));
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if (d == NULL)
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return (ENXIO);
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ret = 0;
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s = splmidi();
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/* Begin recording. */
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d->callback(d, MIDI_CB_START | MIDI_CB_RD);
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/* Have we got the data to read? */
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if ((d->flags & MIDI_F_NBIO) != 0 && d->midi_dbuf_in.rl == 0)
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ret = EAGAIN;
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else {
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len = buf->uio_resid;
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ret = midibuf_uioread(&d->midi_dbuf_in, buf, len);
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if (ret < 0)
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ret = -ret;
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else
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ret = 0;
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}
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if (ret == 0 && d->read != NULL)
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ret = d->read(i_dev, buf, flag);
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splx(s);
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return (ret);
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}
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int
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midi_write(dev_t i_dev, struct uio * buf, int flag)
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{
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int dev, unit, s, len, ret;
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mididev_info *d;
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dev = minor(i_dev);
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d = get_mididev_info(i_dev, &unit);
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DEB(printf("write midi%d subdev %d flag 0x%08x\n", unit, dev & 0xf, flag));
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if (d == NULL)
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return (ENXIO);
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ret = 0;
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s = splmidi();
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/* Begin playing. */
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d->callback(d, MIDI_CB_START | MIDI_CB_WR);
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/* Have we got the data to write? */
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if ((d->flags & MIDI_F_NBIO) != 0 && d->midi_dbuf_out.fl == 0)
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ret = EAGAIN;
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else {
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len = buf->uio_resid;
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if (len > d->midi_dbuf_out.fl &&
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(d->flags & MIDI_F_NBIO))
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len = d->midi_dbuf_out.fl;
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ret = midibuf_uiowrite(&d->midi_dbuf_out, buf, len);
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if (ret < 0)
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ret = -ret;
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else
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ret = 0;
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}
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/* Begin playing. */
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d->callback(d, MIDI_CB_START | MIDI_CB_WR);
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if (ret == 0 && d->write != NULL)
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ret = d->write(i_dev, buf, flag);
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splx(s);
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return (ret);
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}
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/*
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* generic midi ioctl. Functions of the default driver can be
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* overridden by the device-specific ioctl call.
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* If a device-specific call returns ENOSYS (Function not implemented),
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* the default driver is called. Otherwise, the returned value
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* is passed up.
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*
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* The default handler, for many parameters, sets the value in the
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* descriptor, sets MIDI_F_INIT, and calls the callback function with
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* reason INIT. If successful, the callback returns 1 and the caller
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* can update the parameter.
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*/
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int
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midi_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct proc * p)
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{
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int ret = ENOSYS, dev, unit;
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mididev_info *d;
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struct snd_size *sndsize;
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u_long s;
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dev = minor(i_dev);
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d = get_mididev_info(i_dev, &unit);
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if (d == NULL)
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return (ENXIO);
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if (d->ioctl)
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ret = d->ioctl(i_dev, cmd, arg, mode, p);
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if (ret != ENOSYS)
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return ret;
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/*
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* pass control to the default ioctl handler. Set ret to 0 now.
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*/
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ret = 0;
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/*
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* all routines are called with int. blocked. Make sure that
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* ints are re-enabled when calling slow or blocking functions!
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*/
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s = splmidi();
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switch(cmd) {
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/*
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* we start with the new ioctl interface.
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*/
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case AIONWRITE: /* how many bytes can write ? */
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*(int *)arg = d->midi_dbuf_out.fl;
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break;
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case AIOSSIZE: /* set the current blocksize */
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sndsize = (struct snd_size *)arg;
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if (sndsize->play_size <= d->midi_dbuf_out.unit_size && sndsize->rec_size <= d->midi_dbuf_in.unit_size) {
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d->flags &= ~MIDI_F_HAS_SIZE;
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d->midi_dbuf_out.blocksize = d->midi_dbuf_out.unit_size;
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d->midi_dbuf_in.blocksize = d->midi_dbuf_in.unit_size;
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}
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else {
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if (sndsize->play_size > d->midi_dbuf_out.bufsize / 4)
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sndsize->play_size = d->midi_dbuf_out.bufsize / 4;
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if (sndsize->rec_size > d->midi_dbuf_in.bufsize / 4)
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sndsize->rec_size = d->midi_dbuf_in.bufsize / 4;
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/* Round up the size to the multiple of EV_SZ. */
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d->midi_dbuf_out.blocksize =
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((sndsize->play_size + d->midi_dbuf_out.unit_size - 1)
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/ d->midi_dbuf_out.unit_size) * d->midi_dbuf_out.unit_size;
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d->midi_dbuf_in.blocksize =
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((sndsize->rec_size + d->midi_dbuf_in.unit_size - 1)
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/ d->midi_dbuf_in.unit_size) * d->midi_dbuf_in.unit_size;
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d->flags |= MIDI_F_HAS_SIZE;
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}
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/* FALLTHROUGH */
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case AIOGSIZE: /* get the current blocksize */
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sndsize = (struct snd_size *)arg;
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sndsize->play_size = d->midi_dbuf_out.blocksize;
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sndsize->rec_size = d->midi_dbuf_in.blocksize;
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ret = 0;
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break;
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case AIOSTOP:
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if (*(int *)arg == AIOSYNC_PLAY) /* play */
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*(int *)arg = d->callback(d, MIDI_CB_STOP | MIDI_CB_WR);
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else if (*(int *)arg == AIOSYNC_CAPTURE)
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*(int *)arg = d->callback(d, MIDI_CB_STOP | MIDI_CB_RD);
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else {
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splx(s);
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DEB(printf("AIOSTOP: bad channel 0x%x\n", *(int *)arg));
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*(int *)arg = 0 ;
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|
}
|
|
break ;
|
|
|
|
case AIOSYNC:
|
|
DEB(printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
|
|
((snd_sync_parm *)arg)->chan,
|
|
((snd_sync_parm *)arg)->pos));
|
|
break;
|
|
/*
|
|
* here follow the standard ioctls (filio.h etc.)
|
|
*/
|
|
case FIONREAD: /* get # bytes to read */
|
|
*(int *)arg = d->midi_dbuf_in.rl;
|
|
break;
|
|
|
|
case FIOASYNC: /*set/clear async i/o */
|
|
DEB( printf("FIOASYNC\n") ; )
|
|
break;
|
|
|
|
case FIONBIO: /* set/clear non-blocking i/o */
|
|
if ( *(int *)arg == 0 )
|
|
d->flags &= ~MIDI_F_NBIO ;
|
|
else
|
|
d->flags |= MIDI_F_NBIO ;
|
|
break ;
|
|
|
|
case MIOSPASSTHRU: /* set/clear passthru */
|
|
if ( *(int *)arg == 0 )
|
|
d->flags &= ~MIDI_F_PASSTHRU ;
|
|
else
|
|
d->flags |= MIDI_F_PASSTHRU ;
|
|
|
|
/* Init the queue. */
|
|
midibuf_init(&d->midi_dbuf_passthru);
|
|
|
|
/* FALLTHROUGH */
|
|
case MIOGPASSTHRU: /* get passthru */
|
|
if ((d->flags & MIDI_F_PASSTHRU) != 0)
|
|
(int *)arg = 1;
|
|
else
|
|
(int *)arg = 0;
|
|
break ;
|
|
|
|
default:
|
|
DEB(printf("default ioctl midi%d subdev %d fn 0x%08x fail\n",
|
|
unit, dev & 0xf, cmd));
|
|
ret = EINVAL;
|
|
break ;
|
|
}
|
|
splx(s);
|
|
return ret ;
|
|
}
|
|
|
|
int
|
|
midi_poll(dev_t i_dev, int events, struct proc * p)
|
|
{
|
|
int unit, dev, ret, s, lim;
|
|
mididev_info *d;
|
|
|
|
dev = minor(i_dev);
|
|
d = get_mididev_info(i_dev, &unit);
|
|
|
|
if (d == NULL)
|
|
return (ENXIO);
|
|
|
|
if (d->poll)
|
|
ret = d->poll(i_dev, events, p);
|
|
|
|
ret = 0;
|
|
s = splmidi();
|
|
|
|
/* 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(p, &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(p, &d->midi_dbuf_in.sel);
|
|
else
|
|
/* We can write now. */
|
|
ret |= events & (POLLIN | POLLRDNORM);
|
|
}
|
|
splx(s);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
void
|
|
midi_intr(mididev_info *d)
|
|
{
|
|
if (d->intr != NULL)
|
|
d->intr(d->intrarg, d);
|
|
}
|
|
|
|
/*
|
|
* These handle the status message of the midi drivers.
|
|
*/
|
|
|
|
int
|
|
midistat_open(dev_t i_dev, int flags, int mode, struct proc * p)
|
|
{
|
|
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 proc * p)
|
|
{
|
|
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 < NMIDI_MAX ; i++) {
|
|
md = &midi_info[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 s, len;
|
|
|
|
s = splmidi();
|
|
len = min(uio->uio_resid, strlen(&buf[*ptr]));
|
|
if (len > 0) {
|
|
uiomove(&buf[*ptr], len, uio);
|
|
*ptr += len;
|
|
}
|
|
splx(s);
|
|
|
|
return (0);
|
|
}
|