freebsd-dev/sys/dev/sound/pcm/sound.h

/*
 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
 * Copyright by Hannu Savolainen 1995
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

/*
 * first, include kernel header files.
 */

#ifndef _OS_H_
#define _OS_H_

#ifdef _KERNEL
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioccom.h>
#include <sys/filio.h>
#include <sys/sockio.h>
#include <sys/fcntl.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/kernel.h> /* for DATA_SET */
#include <sys/module.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/syslog.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#if __FreeBSD_version > 500000
#include <sys/bio.h>
#endif
#include <sys/buf.h>
#include <machine/clock.h>	/* for DELAY */
#include <machine/resource.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <sys/mman.h>
#include <sys/poll.h>
#include <sys/soundcard.h>
#include <sys/sysctl.h>
#include <isa/isavar.h>
#include <sys/kobj.h>
#include <vm/vm.h>
#include <vm/pmap.h>

#undef	USING_MUTEX
#undef	USING_DEVFS

#if __FreeBSD_version > 500000
#define USING_MUTEX
#define USING_DEVFS
#else
#define	INTR_TYPE_AV INTR_TYPE_MISC
#endif
#define SND_DYNSYSCTL

#ifndef	INTR_MPSAFE
#define	INTR_MPSAFE	0
#endif

#else
struct isa_device { int dummy; };
#define d_open_t void
#define d_close_t void
#define d_read_t void
#define d_write_t void
#define d_ioctl_t void
#define d_select_t void
#endif /* _KERNEL */

#endif	/* _OS_H_ */

struct pcm_channel;
typedef struct pcm_channel pcm_channel;
struct pcm_feeder;
typedef struct pcm_feeder pcm_feeder;
struct snd_dbuf;
typedef struct snd_dbuf snd_dbuf;
struct snd_mixer;
typedef struct snd_mixer snd_mixer;

#include <dev/sound/pcm/buffer.h>
#include <dev/sound/pcm/channel.h>
#include <dev/sound/pcm/feeder.h>
#include <dev/sound/pcm/mixer.h>
#include <dev/sound/pcm/dsp.h>

struct snddev_channel {
	SLIST_ENTRY(snddev_channel) link;
	struct pcm_channel *channel;
};

#define SND_STATUSLEN	64
/* descriptor of audio device */
struct snddev_info {
	SLIST_HEAD(, snddev_channel) channels;
	struct pcm_channel *fakechan;
	unsigned devcount, chancount, vchancount;
	unsigned flags;
	int inprog;
	void *devinfo;
	device_t dev;
	char status[SND_STATUSLEN];
	struct sysctl_ctx_list sysctl_tree;
	struct sysctl_oid *sysctl_tree_top;
	void *lock;
};

#ifndef ISADMA_WRITE
#define ISADMA_WRITE B_WRITE
#define ISADMA_READ B_READ
#define ISADMA_RAW B_RAW
#endif

#define PCM_MODVER	1

#define PCM_MINVER	1
#define PCM_PREFVER	PCM_MODVER
#define PCM_MAXVER	1

/*
PROPOSAL:
each unit needs:
status, mixer, dsp, dspW, audio, sequencer, midi-in, seq2, sndproc = 9 devices
dspW and audio are deprecated.
dsp needs min 64 channels, will give it 256

minor = (unit << 20) + (dev << 16) + channel
currently minor = (channel << 16) + (unit << 4) + dev

nomenclature:
	/dev/pcmX/dsp.(0..255)
	/dev/pcmX/dspW
	/dev/pcmX/audio
	/dev/pcmX/status
	/dev/pcmX/mixer
	[etc.]
*/

#define PCMMINOR(x) (minor(x))
#define PCMCHAN(x) ((PCMMINOR(x) & 0x00ff0000) >> 16)
#define PCMUNIT(x) ((PCMMINOR(x) & 0x000000f0) >> 4)
#define PCMDEV(x)   (PCMMINOR(x) & 0x0000000f)
#define PCMMKMINOR(u, d, c) ((((c) & 0xff) << 16) | (((u) & 0x0f) << 4) | ((d) & 0x0f))

#define SD_F_SIMPLEX		0x00000001
#define	SD_F_AUTOVCHAN		0x00000002
#define SD_F_PRIO_RD		0x10000000
#define SD_F_PRIO_WR		0x20000000
#define SD_F_PRIO_SET		(SD_F_PRIO_RD | SD_F_PRIO_WR)
#define SD_F_DIR_SET		0x40000000
#define SD_F_TRANSIENT		0xf0000000

/* many variables should be reduced to a range. Here define a macro */
#define RANGE(var, low, high) (var) = \
	(((var)<(low))? (low) : ((var)>(high))? (high) : (var))
#define DSP_BUFFSIZE (8192)

/* make figuring out what a format is easier. got AFMT_STEREO already */
#define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE)
#define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE)
#define AFMT_8BIT (AFMT_U8 | AFMT_S8)
#define AFMT_SIGNED (AFMT_S16_LE | AFMT_S16_BE | AFMT_S8)
#define AFMT_BIGENDIAN (AFMT_S16_BE | AFMT_U16_BE)

struct pcm_channel *fkchan_setup(device_t dev);
int fkchan_kill(struct pcm_channel *c);

/*
 * Major nuber for the sound driver.
 */
#define SND_CDEV_MAJOR 30

#define	SND_MAXVCHANS	255

/*
 * Minor numbers for the sound driver.
 *
 * Unfortunately Creative called the codec chip of SB as a DSP. For this
 * reason the /dev/dsp is reserved for digitized audio use. There is a
 * device for true DSP processors but it will be called something else.
 * In v3.0 it's /dev/sndproc but this could be a temporary solution.
 */

#define SND_DEV_CTL	0	/* Control port /dev/mixer */
#define SND_DEV_SEQ	1	/* Sequencer /dev/sequencer */
#define SND_DEV_MIDIN	2	/* Raw midi access */
#define SND_DEV_DSP	3	/* Digitized voice /dev/dsp */
#define SND_DEV_AUDIO	4	/* Sparc compatible /dev/audio */
#define SND_DEV_DSP16	5	/* Like /dev/dsp but 16 bits/sample */
#define SND_DEV_STATUS	6	/* /dev/sndstat */
				/* #7 not in use now. */
#define SND_DEV_SEQ2	8	/* /dev/sequencer, level 2 interface */
#define SND_DEV_SNDPROC 9	/* /dev/sndproc for programmable devices */
#define SND_DEV_PSS	SND_DEV_SNDPROC /* ? */
#define SND_DEV_NORESET	10

#define DSP_DEFAULT_SPEED	8000

#define ON		1
#define OFF		0

#ifdef _KERNEL

extern int snd_unit;
extern devclass_t pcm_devclass;

/*
 * some macros for debugging purposes
 * DDB/DEB to enable/disable debugging stuff
 * BVDDB   to enable debugging when bootverbose
 */
#define DDB(x)	x	/* XXX */
#define BVDDB(x) if (bootverbose) x

#ifndef DEB
#define DEB(x)
#endif

SYSCTL_DECL(_hw_snd);

struct pcm_channel *pcm_chnalloc(struct snddev_info *d, int direction, pid_t pid);
int pcm_chnrelease(struct pcm_channel *c);
int pcm_chnref(struct pcm_channel *c, int ref);

struct pcm_channel *pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, void *devinfo);
int pcm_chn_destroy(struct pcm_channel *ch);
int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch, int mkdev);
int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch, int rmdev);

int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo);
int pcm_register(device_t dev, void *devinfo, int numplay, int numrec);
int pcm_unregister(device_t dev);
int pcm_setstatus(device_t dev, char *str);
u_int32_t pcm_getflags(device_t dev);
void pcm_setflags(device_t dev, u_int32_t val);
void *pcm_getdevinfo(device_t dev);

int snd_setup_intr(device_t dev, struct resource *res, int flags,
		   driver_intr_t hand, void *param, void **cookiep);

void *snd_mtxcreate(const char *desc);
void snd_mtxfree(void *m);
void snd_mtxassert(void *m);
void snd_mtxlock(void *m);
void snd_mtxunlock(void *m);
#endif /* _KERNEL */

/* usage of flags in device config entry (config file) */
#define DV_F_DRQ_MASK	0x00000007	/* mask for secondary drq */
#define	DV_F_DUAL_DMA	0x00000010	/* set to use secondary dma channel */

/* ought to be made obsolete */
#define	DV_F_DEV_MASK	0x0000ff00	/* force device type/class */
#define	DV_F_DEV_SHIFT	8		/* force device type/class */