xref: /src/sys/dev/ic/am7930.c

/*	$NetBSD: am7930.c,v 1.8 1996/03/14 19:44:30 christos Exp $	*/

/*
 * Copyright (c) 1995 Rolf Grossmann
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Rolf Grossmann.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

#include "audio.h"
#if NAUDIO > 0

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/proc.h>

#include <machine/autoconf.h>
#include <machine/cpu.h>

#include <sys/audioio.h>
#include <dev/audio_if.h>

#include <dev/ic/am7930reg.h>
#include <sparc/dev/amd7930var.h>

#ifdef AUDIO_DEBUG
extern void Dprintf __P((const char *, ...));

int     amd7930debug = 0;
#define DPRINTF(x)      if (amd7930debug) Dprintf x
#else
#define DPRINTF(x)
#endif

/*
 * Software state, per AMD79C30 audio chip.
 */
struct amd7930_softc {
	struct	device sc_dev;		/* base device */
	struct	intrhand sc_hwih;	/* hardware interrupt vector */
	struct	intrhand sc_swih;	/* software interrupt vector */

	int	sc_open;		/* single use device */
	int	sc_locked;		/* true when transfering data */
	struct	mapreg sc_map;		/* current contents of map registers */

	u_char	sc_rlevel;		/* record level */
	u_char	sc_plevel;		/* play level */
	u_char	sc_mlevel;		/* monitor level */
	u_char	sc_out_port;		/* output port */

	/* interfacing with the interrupt handlers */
	void	(*sc_rintr)(void*);	/* input completion intr handler */
	void	*sc_rarg;		/* arg for sc_rintr() */
	void	(*sc_pintr)(void*);	/* output completion intr handler */
	void	*sc_parg;		/* arg for sc_pintr() */

        /* sc_au is special in that the hardware interrupt handler uses it */
        struct  auio sc_au;		/* recv and xmit buffers, etc */
#define sc_intrcnt	sc_au.au_intrcnt	/* statistics */
};

/* interrupt interfaces */
#ifdef AUDIO_C_HANDLER
int	amd7930hwintr __P((void *));
#define AUDIO_SET_SWINTR ienab_bis(IE_L4)
#else
struct auio *auiop;
#endif
int	amd7930swintr __P((void *));

/* forward declarations */
void	audio_setmap __P((volatile struct amd7930 *, struct mapreg *));
static void init_amd __P((volatile struct amd7930 *));

/* autoconfiguration driver */
void	amd7930attach __P((struct device *, struct device *, void *));
int	amd7930match __P((struct device *, void *, void *));

struct	cfdriver audiocd = {
	NULL, "audio", amd7930match, amd7930attach,
	DV_DULL, sizeof(struct amd7930_softc)
};

struct audio_device amd7930_device = {
	"amd7930",
	"x",
	"audio"
};

/* Write 16 bits of data from variable v to the data port of the audio chip */
#define	WAMD16(amd, v) ((amd)->dr = (v), (amd)->dr = (v) >> 8)

/* The following tables stolen from former (4.4Lite's) sys/sparc/bsd_audio.c */

/*
 * gx, gr & stg gains.  this table must contain 256 elements with
 * the 0th being "infinity" (the magic value 9008).  The remaining
 * elements match sun's gain curve (but with higher resolution):
 * -18 to 0dB in .16dB steps then 0 to 12dB in .08dB steps.
 */
static const u_short gx_coeff[256] = {
	0x9008, 0x8b7c, 0x8b51, 0x8b45, 0x8b42, 0x8b3b, 0x8b36, 0x8b33,
	0x8b32, 0x8b2a, 0x8b2b, 0x8b2c, 0x8b25, 0x8b23, 0x8b22, 0x8b22,
	0x9122, 0x8b1a, 0x8aa3, 0x8aa3, 0x8b1c, 0x8aa6, 0x912d, 0x912b,
	0x8aab, 0x8b12, 0x8aaa, 0x8ab2, 0x9132, 0x8ab4, 0x913c, 0x8abb,
	0x9142, 0x9144, 0x9151, 0x8ad5, 0x8aeb, 0x8a79, 0x8a5a, 0x8a4a,
	0x8b03, 0x91c2, 0x91bb, 0x8a3f, 0x8a33, 0x91b2, 0x9212, 0x9213,
	0x8a2c, 0x921d, 0x8a23, 0x921a, 0x9222, 0x9223, 0x922d, 0x9231,
	0x9234, 0x9242, 0x925b, 0x92dd, 0x92c1, 0x92b3, 0x92ab, 0x92a4,
	0x92a2, 0x932b, 0x9341, 0x93d3, 0x93b2, 0x93a2, 0x943c, 0x94b2,
	0x953a, 0x9653, 0x9782, 0x9e21, 0x9d23, 0x9cd2, 0x9c23, 0x9baa,
	0x9bde, 0x9b33, 0x9b22, 0x9b1d, 0x9ab2, 0xa142, 0xa1e5, 0x9a3b,
	0xa213, 0xa1a2, 0xa231, 0xa2eb, 0xa313, 0xa334, 0xa421, 0xa54b,
	0xada4, 0xac23, 0xab3b, 0xaaab, 0xaa5c, 0xb1a3, 0xb2ca, 0xb3bd,
	0xbe24, 0xbb2b, 0xba33, 0xc32b, 0xcb5a, 0xd2a2, 0xe31d, 0x0808,
	0x72ba, 0x62c2, 0x5c32, 0x52db, 0x513e, 0x4cce, 0x43b2, 0x4243,
	0x41b4, 0x3b12, 0x3bc3, 0x3df2, 0x34bd, 0x3334, 0x32c2, 0x3224,
	0x31aa, 0x2a7b, 0x2aaa, 0x2b23, 0x2bba, 0x2c42, 0x2e23, 0x25bb,
	0x242b, 0x240f, 0x231a, 0x22bb, 0x2241, 0x2223, 0x221f, 0x1a33,
	0x1a4a, 0x1acd, 0x2132, 0x1b1b, 0x1b2c, 0x1b62, 0x1c12, 0x1c32,
	0x1d1b, 0x1e71, 0x16b1, 0x1522, 0x1434, 0x1412, 0x1352, 0x1323,
	0x1315, 0x12bc, 0x127a, 0x1235, 0x1226, 0x11a2, 0x1216, 0x0a2a,
	0x11bc, 0x11d1, 0x1163, 0x0ac2, 0x0ab2, 0x0aab, 0x0b1b, 0x0b23,
	0x0b33, 0x0c0f, 0x0bb3, 0x0c1b, 0x0c3e, 0x0cb1, 0x0d4c, 0x0ec1,
	0x079a, 0x0614, 0x0521, 0x047c, 0x0422, 0x03b1, 0x03e3, 0x0333,
	0x0322, 0x031c, 0x02aa, 0x02ba, 0x02f2, 0x0242, 0x0232, 0x0227,
	0x0222, 0x021b, 0x01ad, 0x0212, 0x01b2, 0x01bb, 0x01cb, 0x01f6,
	0x0152, 0x013a, 0x0133, 0x0131, 0x012c, 0x0123, 0x0122, 0x00a2,
	0x011b, 0x011e, 0x0114, 0x00b1, 0x00aa, 0x00b3, 0x00bd, 0x00ba,
	0x00c5, 0x00d3, 0x00f3, 0x0062, 0x0051, 0x0042, 0x003b, 0x0033,
	0x0032, 0x002a, 0x002c, 0x0025, 0x0023, 0x0022, 0x001a, 0x0021,
	0x001b, 0x001b, 0x001d, 0x0015, 0x0013, 0x0013, 0x0012, 0x0012,
	0x000a, 0x000a, 0x0011, 0x0011, 0x000b, 0x000b, 0x000c, 0x000e,
};

/*
 * second stage play gain.
 */
static const u_short ger_coeff[] = {
	0x431f, /* 5. dB */
	0x331f, /* 5.5 dB */
	0x40dd, /* 6. dB */
	0x11dd, /* 6.5 dB */
	0x440f, /* 7. dB */
	0x411f, /* 7.5 dB */
	0x311f, /* 8. dB */
	0x5520, /* 8.5 dB */
	0x10dd, /* 9. dB */
	0x4211, /* 9.5 dB */
	0x410f, /* 10. dB */
	0x111f, /* 10.5 dB */
	0x600b, /* 11. dB */
	0x00dd, /* 11.5 dB */
	0x4210, /* 12. dB */
	0x110f, /* 13. dB */
	0x7200, /* 14. dB */
	0x2110, /* 15. dB */
	0x2200, /* 15.9 dB */
	0x000b, /* 16.9 dB */
	0x000f  /* 18. dB */
#define NGER (sizeof(ger_coeff) / sizeof(ger_coeff[0]))
};

/*
 * Define our interface to the higher level audio driver.
 */
int	amd7930_open __P((dev_t, int));
void	amd7930_close __P((void *));
int	amd7930_set_in_sr __P((void *, u_long));
u_long	amd7930_get_in_sr __P((void *));
int	amd7930_set_out_sr __P((void *, u_long));
u_long	amd7930_get_out_sr __P((void *));
int	amd7930_query_encoding __P((void *, struct audio_encoding *));
int	amd7930_set_encoding __P((void *, u_int));
int	amd7930_get_encoding __P((void *));
int	amd7930_set_precision __P((void *, u_int));
int	amd7930_get_precision __P((void *));
int	amd7930_set_channels __P((void *, int));
int	amd7930_get_channels __P((void *));
int	amd7930_round_blocksize __P((void *, int));
int	amd7930_set_out_port __P((void *, int));
int	amd7930_get_out_port __P((void *));
int	amd7930_set_in_port __P((void *, int));
int	amd7930_get_in_port __P((void *));
int	amd7930_commit_settings __P((void *));
u_int	amd7930_get_silence __P((int));
int	amd7930_start_output __P((void *, void *, int, void (*)(void *),
				  void *));
int	amd7930_start_input __P((void *, void *, int, void (*)(void *),
				 void *));
int	amd7930_halt_output __P((void *));
int	amd7930_halt_input __P((void *));
int	amd7930_cont_output __P((void *));
int	amd7930_cont_input __P((void *));
int	amd7930_getdev __P((void *, struct audio_device *));
int	amd7930_setfd __P((void *, int));
int	amd7930_set_port __P((void *, mixer_ctrl_t *));
int	amd7930_get_port __P((void *, mixer_ctrl_t *));
int	amd7930_query_devinfo __P((void *, mixer_devinfo_t *));


struct audio_hw_if sa_hw_if = {
	amd7930_open,
	amd7930_close,
	NULL,
	amd7930_set_in_sr,
	amd7930_get_in_sr,
	amd7930_set_out_sr,
	amd7930_get_out_sr,
	amd7930_query_encoding,
	amd7930_set_encoding,
	amd7930_get_encoding,
	amd7930_set_precision,
	amd7930_get_precision,
	amd7930_set_channels,
	amd7930_get_channels,
	amd7930_round_blocksize,
	amd7930_set_out_port,
	amd7930_get_out_port,
	amd7930_set_in_port,
	amd7930_get_in_port,
	amd7930_commit_settings,
	amd7930_get_silence,
	NULL,
	NULL,
	amd7930_start_output,
	amd7930_start_input,
	amd7930_halt_output,
	amd7930_halt_input,
	amd7930_cont_output,
	amd7930_cont_input,
	NULL,
	amd7930_getdev,
	amd7930_setfd,
	amd7930_set_port,
	amd7930_get_port,
	amd7930_query_devinfo,
	1,
	0
};

/* autoconfig routines */

int
amd7930match(parent, vcf, aux)
	struct device *parent;
	void *vcf, *aux;
{
	struct cfdata *cf = vcf;
	register struct confargs *ca = aux;
	register struct romaux *ra = &ca->ca_ra;

	if (CPU_ISSUN4)
		return (0);
	return (strcmp(cf->cf_driver->cd_name, ra->ra_name) == 0);
}

/*
 * Audio chip found.
 */
void
amd7930attach(parent, self, args)
	struct device *parent, *self;
	void *args;
{
	register struct amd7930_softc *sc = (struct amd7930_softc *)self;
	register struct confargs *ca = args;
	register struct romaux *ra = &ca->ca_ra;
	register volatile struct amd7930 *amd;
	register int pri;

	if (ra->ra_nintr != 1) {
		printf(": expected 1 interrupt, got %d\n", ra->ra_nintr);
		return;
	}
	pri = ra->ra_intr[0].int_pri;
	printf(" pri %d, softpri %d\n", pri, PIL_AUSOFT);
	amd = (volatile struct amd7930 *)(ra->ra_vaddr ?
		ra->ra_vaddr : mapiodev(ra->ra_reg, 0, sizeof (*amd),
					ca->ca_bustype));

	sc->sc_map.mr_mmr1 = AMD_MMR1_GX | AMD_MMR1_GER |
			     AMD_MMR1_GR | AMD_MMR1_STG;
	sc->sc_au.au_amd = amd;
	/* set boot defaults */
	sc->sc_rlevel = 128;
	sc->sc_plevel = 128;
	sc->sc_mlevel = 0;
	sc->sc_out_port = SUNAUDIO_SPEAKER;

	init_amd(amd);

#ifndef AUDIO_C_HANDLER
	auiop = &sc->sc_au;
	intr_fasttrap(pri, amd7930_trap);
#else
	sc->sc_hwih.ih_fun = amd7930hwintr;
	sc->sc_hwih.ih_arg = &sc->sc_au;
	intr_establish(pri, &sc->sc_hwih);
#endif
	sc->sc_swih.ih_fun = amd7930swintr;
	sc->sc_swih.ih_arg = sc;
	intr_establish(PIL_AUSOFT, &sc->sc_swih);

	evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt);

	if (audio_hardware_attach(&sa_hw_if, sc) != 0)
		printf("audio: could not attach to audio pseudo-device driver\n");
}

static void
init_amd(amd)
	register volatile struct amd7930 *amd;
{
	/* disable interrupts */
	amd->cr = AMDR_INIT;
	amd->dr = AMD_INIT_PMS_ACTIVE | AMD_INIT_INT_DISABLE;

	/*
	 * Initialize the mux unit.  We use MCR3 to route audio (MAP)
	 * through channel Bb.  MCR1 and MCR2 are unused.
	 * Setting the INT enable bit in MCR4 will generate an interrupt
	 * on each converted audio sample.
	 */
	amd->cr = AMDR_MUX_1_4;
 	amd->dr = 0;
	amd->dr = 0;
	amd->dr = (AMD_MCRCHAN_BB << 4) | AMD_MCRCHAN_BA;
	amd->dr = AMD_MCR4_INT_ENABLE;
}

int
amd7930_open(dev, flags)
	dev_t dev;
	int flags;
{
	register struct amd7930_softc *sc;
	int unit = AUDIOUNIT(dev);

	DPRINTF(("sa_open: unit %d\n",unit));

	if (unit >= audiocd.cd_ndevs)
		return (ENODEV);
	if ((sc = audiocd.cd_devs[unit]) == NULL)
		return (ENXIO);
	if (sc->sc_open)
		return (EBUSY);
	sc->sc_open = 1;
	sc->sc_locked = 0;
	sc->sc_rintr = 0;
	sc->sc_rarg = 0;
	sc->sc_pintr = 0;
	sc->sc_parg = 0;

	sc->sc_au.au_rdata = 0;
	sc->sc_au.au_pdata = 0;

	DPRINTF(("saopen: ok -> sc=0x%x\n",sc));

	return (0);
}

void
amd7930_close(addr)
	void *addr;
{
	register struct amd7930_softc *sc = addr;

	DPRINTF(("sa_close: sc=0x%x\n", sc));
	/*
	 * halt i/o, clear open flag, and done.
	 */
	amd7930_halt_input(sc);
	amd7930_halt_output(sc);
	sc->sc_open = 0;

	DPRINTF(("sa_close: closed.\n"));
}

int
amd7930_set_in_sr(addr, sr)
	void *addr;
	u_long sr;
{
	if (sr != 8000)
		return EINVAL;

	return(0);	/* no other sampling rates supported by amd chip */
}

u_long
amd7930_get_in_sr(addr)
	void *addr;
{
	return(8000);
}

int
amd7930_set_out_sr(addr, sr)
	void *addr;
	u_long sr;
{
	if (sr != 8000)
		return(EINVAL);

	return(0);	/* no other sampling rates supported by amd chip */
}

u_long
amd7930_get_out_sr(addr)
	void *addr;
{
	return(8000);
}

int
amd7930_query_encoding(addr, fp)
	void *addr;
	struct audio_encoding *fp;
{
	switch (fp->index) {	/* ??? */
	    case 0:
		    strcpy(fp->name, "MU-Law");
		    fp->format_id = AUDIO_ENCODING_ULAW;
		    break;
	    default:
		    return(EINVAL);
		    /*NOTREACHED*/
	}
	return(0);
}

int
amd7930_set_encoding(addr, enc)
	void *addr;
	u_int enc;
{
	if (enc != AUDIO_ENCODING_ULAW)
		return(EINVAL);

	return(0);		/* no other encoding supported by amd chip */
}

int
amd7930_get_encoding(addr)
	void *addr;
{
	return(AUDIO_ENCODING_ULAW);
}

int
amd7930_set_precision(addr, prec)
	void *addr;
	u_int prec;
{
	if (prec != 8)
		return(EINVAL);

	return(0);		/* no other precision supported by amd chip */
}

int
amd7930_get_precision(addr)
	void *addr;
{
	return(8);
}

int
amd7930_set_channels(addr, chans)
	void *addr;
	int chans;
{
	if (chans != 1)
		return(EINVAL);

	return(0);		/* only 1 channel supported by amd chip */
}

int
amd7930_get_channels(addr)
	void *addr;
{
	return(1);
}

int
amd7930_round_blocksize(addr, blk)
	void *addr;
	int blk;
{
	return(blk);
}

int
amd7930_set_out_port(addr, port)
	void *addr;
	int port;
{
	register struct amd7930_softc *sc = addr;

	switch(port) {
	    case SUNAUDIO_SPEAKER:
	    case SUNAUDIO_HEADPHONES:
		sc->sc_out_port = port;	/* set on commit */
		break;
	    default:
		return(EINVAL);
	}
	return(0);
}

int
amd7930_get_out_port(addr)
	void *addr;
{
	register struct amd7930_softc *sc = addr;

	return(sc->sc_out_port);
}

int
amd7930_set_in_port(addr, port)
	void *addr;
	int port;
{
	if (port != SUNAUDIO_MIC_PORT)
		return(EINVAL);

	return(0);	/* only microphone input supported by amd chip */
}

int
amd7930_get_in_port(addr)
	void *addr;
{
	return(SUNAUDIO_MIC_PORT);
}

int
amd7930_commit_settings(addr)
	void *addr;
{
	register struct amd7930_softc *sc = addr;
	register struct mapreg *map;
	register volatile struct amd7930 *amd;
	register int s, level;

	DPRINTF(("sa_commit.\n"));

	map = &sc->sc_map;
	amd = sc->sc_au.au_amd;

	map->mr_gx = gx_coeff[sc->sc_rlevel];
	map->mr_stgr = gx_coeff[sc->sc_mlevel];

	level = (sc->sc_plevel * (256 + NGER)) >> 8;
	if (level >= 256) {
		map->mr_ger = ger_coeff[level - 256];
		map->mr_gr = gx_coeff[255];
	} else {
		map->mr_ger = ger_coeff[0];
		map->mr_gr = gx_coeff[level];
	}

	if (sc->sc_out_port == SUNAUDIO_SPEAKER)
		map->mr_mmr2 |= AMD_MMR2_LS;
	else
		map->mr_mmr2 &= ~AMD_MMR2_LS;

	s = splaudio();

	amd->cr = AMDR_MAP_MMR1;
	amd->dr = map->mr_mmr1;
	amd->cr = AMDR_MAP_GX;
	WAMD16(amd, map->mr_gx);
	amd->cr = AMDR_MAP_STG;
	WAMD16(amd, map->mr_stgr);
	amd->cr = AMDR_MAP_GR;
	WAMD16(amd, map->mr_gr);
	amd->cr = AMDR_MAP_GER;
	WAMD16(amd, map->mr_ger);
	amd->cr = AMDR_MAP_MMR2;
	amd->dr = map->mr_mmr2;

	splx(s);
	return(0);
}

u_int
amd7930_get_silence(enc)
	int enc;
{
	return(0x7f);
}

int
amd7930_start_output(addr, p, cc, intr, arg)
	void *addr;
	void *p;
	int cc;
	void (*intr) __P((void *));
	void *arg;
{
	register struct amd7930_softc *sc = addr;

#ifdef AUDIO_DEBUG
	if (amd7930debug > 1)
		Dprintf("sa_start_output: cc=%d 0x%x (0x%x)\n", cc, intr, arg);
#endif

	if (!sc->sc_locked) {
		register volatile struct amd7930 *amd;

		amd = sc->sc_au.au_amd;
		amd->cr = AMDR_INIT;
		amd->dr = AMD_INIT_PMS_ACTIVE;
		sc->sc_locked = 1;
		DPRINTF(("sa_start_output: started intrs.\n"));
	}
	sc->sc_pintr = intr;
	sc->sc_parg = arg;
	sc->sc_au.au_pdata = p;
	sc->sc_au.au_pend = p + cc - 1;
	return(0);
}

/* ARGSUSED */
int
amd7930_start_input(addr, p, cc, intr, arg)
	void *addr;
	void *p;
	int cc;
	void (*intr) __P((void *));
	void *arg;
{
	register struct amd7930_softc *sc = addr;

#ifdef AUDIO_DEBUG
	if (amd7930debug > 1)
		Dprintf("sa_start_input: cc=%d 0x%x (0x%x)\n", cc, intr, arg);
#endif

	if (!sc->sc_locked) {
		register volatile struct amd7930 *amd;

		amd = sc->sc_au.au_amd;
		amd->cr = AMDR_INIT;
		amd->dr = AMD_INIT_PMS_ACTIVE;
		sc->sc_locked = 1;
		DPRINTF(("sa_start_input: started intrs.\n"));
	}
	sc->sc_rintr = intr;
	sc->sc_rarg = arg;
	sc->sc_au.au_rdata = p;
	sc->sc_au.au_rend = p + cc -1;
	return(0);
}

int
amd7930_halt_output(addr)
	void *addr;
{
	register struct amd7930_softc *sc = addr;
	register volatile struct amd7930 *amd;

	/* XXX only halt, if input is also halted ?? */
	amd = sc->sc_au.au_amd;
	amd->cr = AMDR_INIT;
	amd->dr = AMD_INIT_PMS_ACTIVE | AMD_INIT_INT_DISABLE;
	sc->sc_locked = 0;

	return(0);
}

int
amd7930_halt_input(addr)
	void *addr;
{
	register struct amd7930_softc *sc = addr;
	register volatile struct amd7930 *amd;

	/* XXX only halt, if output is also halted ?? */
	amd = sc->sc_au.au_amd;
	amd->cr = AMDR_INIT;
	amd->dr = AMD_INIT_PMS_ACTIVE | AMD_INIT_INT_DISABLE;
	sc->sc_locked = 0;

	return(0);
}

int
amd7930_cont_output(addr)
	void *addr;
{
	DPRINTF(("amd7930_cont_output: never called, what should it do?!\n"));
	return(0);
}

int
amd7930_cont_input(addr)
	void *addr;
{
	DPRINTF(("amd7930_cont_input: never called, what should it do?!\n"));
	return(0);
}

int
amd7930_getdev(addr, retp)
        void *addr;
        struct audio_device *retp;
{
        *retp = amd7930_device;
        return 0;
}

int
amd7930_setfd(addr, flag)
        void *addr;
        int flag;
{
        /* Always full-duplex */
        return(0);
}

int
amd7930_set_port(addr, cp)
	void *addr;
	mixer_ctrl_t *cp;
{
	register struct amd7930_softc *sc = addr;

	DPRINTF(("amd7930_set_port: port=%d", cp->dev));

	if (cp->type != AUDIO_MIXER_VALUE || cp->un.value.num_channels != 1)
		return(EINVAL);

	switch(cp->dev) {
	    case SUNAUDIO_MIC_PORT:
		    sc->sc_rlevel = cp->un.value.level[AUDIO_MIXER_LEVEL_MONO];
		    break;
	    case SUNAUDIO_SPEAKER:
	    case SUNAUDIO_HEADPHONES:
		    sc->sc_plevel = cp->un.value.level[AUDIO_MIXER_LEVEL_MONO];
		    break;
	    case SUNAUDIO_MONITOR:
		    sc->sc_mlevel = cp->un.value.level[AUDIO_MIXER_LEVEL_MONO];
		    break;
	    default:
		    return(EINVAL);
		    /* NOTREACHED */
	}
	return(0);
}

int
amd7930_get_port(addr, cp)
	void *addr;
	mixer_ctrl_t *cp;
{
	register struct amd7930_softc *sc = addr;

	DPRINTF(("amd7930_get_port: port=%d", cp->dev));

	if (cp->type != AUDIO_MIXER_VALUE || cp->un.value.num_channels != 1)
		return(EINVAL);

	switch(cp->dev) {
	    case SUNAUDIO_MIC_PORT:
		    cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_rlevel;
		    break;
	    case SUNAUDIO_SPEAKER:
	    case SUNAUDIO_HEADPHONES:
		    cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_plevel;
		    break;
	    case SUNAUDIO_MONITOR:
		    cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_mlevel;
		    break;
	    default:
		    return(EINVAL);
		    /* NOTREACHED */
	}
	return(0);
}

int
amd7930_query_devinfo(addr, dip)
	void *addr;
	register mixer_devinfo_t *dip;
{
	switch(dip->index) {
	    case SUNAUDIO_MIC_PORT:
		    dip->type = AUDIO_MIXER_VALUE;
		    dip->mixer_class = SUNAUDIO_INPUT_CLASS;
		    dip->prev = dip->next = AUDIO_MIXER_LAST;
		    strcpy(dip->label.name, AudioNmicrophone);
		    dip->un.v.num_channels = 1;
		    strcpy(dip->un.v.units.name, AudioNvolume);
		    break;
	    case SUNAUDIO_SPEAKER:
		    dip->type = AUDIO_MIXER_VALUE;
		    dip->mixer_class = SUNAUDIO_OUTPUT_CLASS;
		    dip->prev = dip->next = AUDIO_MIXER_LAST;
		    strcpy(dip->label.name, AudioNspeaker);
		    dip->un.v.num_channels = 1;
		    strcpy(dip->un.v.units.name, AudioNvolume);
		    break;
	    case SUNAUDIO_HEADPHONES:
		    dip->type = AUDIO_MIXER_VALUE;
		    dip->mixer_class = SUNAUDIO_OUTPUT_CLASS;
		    dip->prev = dip->next = AUDIO_MIXER_LAST;
		    strcpy(dip->label.name, AudioNheadphone);
		    dip->un.v.num_channels = 1;
		    strcpy(dip->un.v.units.name, AudioNvolume);
		    break;
	    case SUNAUDIO_MONITOR:
		    dip->type = AUDIO_MIXER_VALUE;
		    dip->mixer_class = SUNAUDIO_OUTPUT_CLASS;
		    dip->next = dip->prev = AUDIO_MIXER_LAST;
		    strcpy(dip->label.name, AudioNmonitor);
		    dip->un.v.num_channels = 1;
		    strcpy(dip->un.v.units.name, AudioNvolume);
		    break;
	    case SUNAUDIO_INPUT_CLASS:
		    dip->type = AUDIO_MIXER_CLASS;
		    dip->mixer_class = SUNAUDIO_INPUT_CLASS;
		    dip->next = dip->prev = AUDIO_MIXER_LAST;
		    strcpy(dip->label.name, AudioCInputs);
		    break;
	    case SUNAUDIO_OUTPUT_CLASS:
		    dip->type = AUDIO_MIXER_CLASS;
		    dip->mixer_class = SUNAUDIO_OUTPUT_CLASS;
		    dip->next = dip->prev = AUDIO_MIXER_LAST;
		    strcpy(dip->label.name, AudioCOutputs);
		    break;
	    default:
		    return ENXIO;
		    /*NOTREACHED*/
	}

	DPRINTF(("AUDIO_MIXER_DEVINFO: name=%s\n", dip->label.name));

	return(0);
}

#ifdef AUDIO_C_HANDLER
int
amd7930hwintr(au0)
	void *au0;
{
	register struct auio *au = au0;
	register volatile struct amd7930 *amd = au->au_amd;
	register u_char *d, *e;
	register int k;

	k = amd->ir;		/* clear interrupt */

	/* receive incoming data */
	d = au->au_rdata;
	e = au->au_rend;
	if (d && d <= e) {
		*d = amd->bbrb;
		au->au_rdata++;
		if (d == e) {
#ifdef AUDIO_DEBUG
		        if (amd7930debug > 1)
                		Dprintf("amd7930hwintr: swintr(r) requested");
#endif
			AUDIO_SET_SWINTR;
		}
	}

	/* send outgoing data */
	d = au->au_pdata;
	e = au->au_pend;
	if (d && d <= e) {
		amd->bbtb = *d;
		au->au_pdata++;
		if (d == e) {
#ifdef AUDIO_DEBUG
		        if (amd7930debug > 1)
                		Dprintf("amd7930hwintr: swintr(p) requested");
#endif
			AUDIO_SET_SWINTR;
		}
	}

	return (1);
}
#endif /* AUDIO_C_HANDLER */

int
amd7930swintr(sc0)
	void *sc0;
{
	register struct amd7930_softc *sc = sc0;
	register struct auio *au;
	register int s, ret = 0;

#ifdef AUDIO_DEBUG
	if (amd7930debug > 1)
		Dprintf("audiointr: sc=0x%x\n",sc);
#endif

	au = &sc->sc_au;
	s = splaudio();
	if (au->au_rdata > au->au_rend && sc->sc_rintr != NULL) {
		splx(s);
		ret = 1;
		(*sc->sc_rintr)(sc->sc_rarg);
		s = splaudio();
	}
	if (au->au_pdata > au->au_pend && sc->sc_pintr != NULL) {
		splx(s);
		ret = 1;
		(*sc->sc_pintr)(sc->sc_parg);
	} else
		splx(s);
	return (ret);
}
#endif /* NAUDIO > 0 */