235 lines
6.4 KiB
C
235 lines
6.4 KiB
C
/*
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* Include file for midi sequencer driver.
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*
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* Copyright by Seigo Tanimura 1999.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 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 copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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/*
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* first, include kernel header files.
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*/
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#ifndef _SEQUENCER_H_
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#define _SEQUENCER_H_
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ioccom.h>
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#include <sys/filio.h>
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#include <sys/sockio.h>
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#include <sys/fcntl.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/kernel.h> /* for DATA_SET */
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/uio.h>
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#include <sys/syslog.h>
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#include <sys/errno.h>
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#include <sys/malloc.h>
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#include <machine/clock.h> /* for DELAY */
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#include <sys/soundcard.h>
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#define SEQ_CDEV_MAJOR MIDI_CDEV_MAJOR
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/*
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* the following assumes that FreeBSD 3.X uses poll(2) instead of select(2).
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* This change dates to late 1997.
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*/
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#include <sys/poll.h>
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#define d_select_t d_poll_t
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typedef struct _seqdev_info seqdev_info;
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typedef int (seq_callback_t)(seqdev_info *sd, int reason);
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/*
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* descriptor of sequencer operations ...
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*
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*/
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struct _seqdev_info {
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/*
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* the first part of the descriptor is filled up from a
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* template.
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*/
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char name[64];
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int type ;
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d_open_t *open;
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d_close_t *close;
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d_read_t *read;
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d_write_t *write;
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d_ioctl_t *ioctl;
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d_poll_t *poll;
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seq_callback_t *callback;
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/*
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* combinations of the following flags are used as second argument in
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* the callback from the dma module to the device-specific routines.
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*/
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#define SEQ_CB_RD 0x100 /* read callback */
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#define SEQ_CB_WR 0x200 /* write callback */
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#define SEQ_CB_REASON_MASK 0xff
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#define SEQ_CB_START 0x01 /* start dma op */
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#define SEQ_CB_STOP 0x03 /* stop dma op */
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#define SEQ_CB_ABORT 0x04 /* abort dma op */
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#define SEQ_CB_INIT 0x05 /* init board parameters */
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/*
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* callback extensions
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*/
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#define SEQ_CB_DMADONE 0x10
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#define SEQ_CB_DMAUPDATE 0x11
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#define SEQ_CB_DMASTOP 0x12
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/* init can only be called with int enabled and
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* no pending DMA activity.
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*/
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/*
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* whereas from here, parameters are set at runtime.
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* io_base == 0 means that the board is not configured.
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*/
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int unit; /* unit number of the device */
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void *softc; /* softc for a device */
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int bd_id ; /* used to hold board-id info, eg. sb version,
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* mss codec type, etc. etc.
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*/
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midi_dbuf midi_dbuf_in; /* midi input event/message queue */
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midi_dbuf midi_dbuf_out; /* midi output event/message queue */
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/*
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* these parameters describe the operation of the board.
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* Generic things like busy flag, speed, etc are here.
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*/
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volatile u_long flags ; /* 32 bits, used for various purposes. */
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/*
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* we have separate flags for read and write, although in some
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* cases this is probably not necessary (e.g. because we cannot
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* know how many processes are using the device, we cannot
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* distinguish if open, close, abort are for a write or for a
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* read).
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*/
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/*
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* the following flag is used by open-close routines
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* to mark the status of the device.
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*/
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#define SEQ_F_BUSY 0x0001 /* has been opened */
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/*
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* the next two are used to allow only one pending operation of
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* each type.
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*/
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#define SEQ_F_READING 0x0004 /* have a pending read */
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#define SEQ_F_WRITING 0x0008 /* have a pending write */
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/*
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* flag used to mark a pending close.
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*/
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#define SEQ_F_CLOSING 0x0040 /* a pending close */
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/*
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* if user has not set block size, then make it adaptive
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* (0.25s, or the perhaps last read/write ?)
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*/
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#define SEQ_F_HAS_SIZE 0x0080 /* user set block size */
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/*
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* assorted flags related to operating mode.
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*/
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#define SEQ_F_STEREO 0x0100 /* doing stereo */
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#define SEQ_F_NBIO 0x0200 /* do non-blocking i/o */
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/*
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* these flags mark a pending abort on a r/w operation.
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*/
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#define SEQ_F_ABORTING 0x1000 /* a pending abort */
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/*
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* this is used to mark that board initialization is needed, e.g.
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* because of a change in sampling rate, format, etc. -- It will
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* be done at the next convenient time.
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*/
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#define SEQ_F_INIT 0x4000 /* changed parameters. need init */
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int play_blocksize, rec_blocksize; /* blocksize for io and dma ops */
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#define swsel midi_dbuf_out.sel
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#define srsel midi_dbuf_in.sel
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u_long interrupts; /* counter of interrupts */
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u_long magic;
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#define MAGIC(unit) ( 0xa4d10de0 + unit )
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void *device_data ; /* just in case it is needed...*/
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} ;
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/*
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* then ioctls and other stuff
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*/
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#define NSEQ_MAX 16 /* Number of supported devices */
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/*
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* many variables should be reduced to a range. Here define a macro
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*/
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#define RANGE(var, low, high) (var) = \
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((var)<(low)?(low) : (var)>(high)?(high) : (var))
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/*
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* finally, all default parameters
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*/
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#define SEQ_BUFFSIZE (4 * 1024) /* XXX */
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/*
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* some macros for debugging purposes
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* DDB/DEB to enable/disable debugging stuff
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* BVDDB to enable debugging when bootverbose
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*/
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#define DDB(x) x /* XXX */
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#define BVDDB(x) if (bootverbose) x
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#ifndef DEB
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#define DEB(x)
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#endif
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extern seqdev_info seq_info[NSEQ_MAX] ;
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#define MIDI_DEV_SEQ 1 /* Sequencer output /dev/sequencer (FM
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synthesizer and MIDI output) */
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#endif /* _SEQUENCER_H_ */
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