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wss.c revision 1.3
      1 /*	$NetBSD: wss.c,v 1.3 1995/04/17 12:07:50 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994 John Brezak
      5  * Copyright (c) 1991-1993 Regents of the University of California.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the Computer Systems
     19  *	Engineering Group at Lawrence Berkeley Laboratory.
     20  * 4. Neither the name of the University nor of the Laboratory may be used
     21  *    to endorse or promote products derived from this software without
     22  *    specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	$Id: wss.c,v 1.3 1995/04/17 12:07:50 cgd Exp $
     37  */
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/errno.h>
     42 #include <sys/ioctl.h>
     43 #include <sys/syslog.h>
     44 #include <sys/device.h>
     45 #include <sys/proc.h>
     46 #include <sys/buf.h>
     47 
     48 #include <machine/cpu.h>
     49 #include <machine/pio.h>
     50 
     51 #include <sys/audioio.h>
     52 #include <dev/audio_if.h>
     53 
     54 #include <dev/isa/isavar.h>
     55 #include <dev/isa/isadmavar.h>
     56 #include <i386/isa/icu.h>
     57 
     58 #include <i386/isa/ad1848var.h>
     59 #include <i386/isa/ad1848reg.h>
     60 #include <i386/isa/wssreg.h>
     61 
     62 /*
     63  * Mixer devices
     64  */
     65 #define WSS_MIC_IN_LVL		0
     66 #define WSS_LINE_IN_LVL		1
     67 #define WSS_DAC_LVL		2
     68 #define WSS_REC_LVL		3
     69 #define WSS_MON_LVL		4
     70 #define WSS_MIC_IN_MUTE		5
     71 #define WSS_LINE_IN_MUTE	6
     72 #define WSS_DAC_MUTE		7
     73 
     74 #define WSS_RECORD_SOURCE	8
     75 
     76 /* Classes */
     77 #define WSS_INPUT_CLASS		9
     78 #define WSS_RECORD_CLASS	10
     79 #define WSS_MONITOR_CLASS	11
     80 
     81 #define DEBUG	/*XXX*/
     82 #ifdef DEBUG
     83 #define DPRINTF(x)	if (wssdebug) printf x
     84 int	wssdebug = 0;
     85 #else
     86 #define DPRINTF(x)
     87 #endif
     88 
     89 struct wss_softc {
     90 	struct	device sc_dev;		/* base device */
     91 	struct	isadev sc_id;		/* ISA device */
     92 	void	*sc_ih;			/* interrupt vectoring */
     93 
     94 	struct  ad1848_softc sc_ad1848;
     95 #define wss_iobase sc_ad1848.sc_iobase
     96 #define wss_irq    sc_ad1848.sc_irq
     97 #define wss_drq    sc_ad1848.sc_drq
     98 
     99 	int 	mic_mute, cd_mute, dac_mute;
    100 };
    101 
    102 struct audio_device wss_device = {
    103 	"wss,ad1848",
    104 	"",
    105 	"WSS"
    106 };
    107 
    108 int	wssprobe();
    109 void	wssattach();
    110 int	wssopen __P((dev_t, int));
    111 
    112 int	wss_getdev __P((void *, struct audio_device *));
    113 int	wss_setfd __P((void *, int));
    114 
    115 int	wss_set_out_port __P((void *, int));
    116 int	wss_get_out_port __P((void *));
    117 int	wss_set_in_port __P((void *, int));
    118 int	wss_get_in_port __P((void *));
    119 int	wss_mixer_set_port __P((void *, mixer_ctrl_t *));
    120 int	wss_mixer_get_port __P((void *, mixer_ctrl_t *));
    121 int	wss_query_devinfo __P((void *, mixer_devinfo_t *));
    122 
    123 /*
    124  * Define our interface to the higher level audio driver.
    125  */
    126 
    127 struct audio_hw_if wss_hw_if = {
    128 	wssopen,
    129 	ad1848_close,
    130 	NULL,
    131 	ad1848_set_in_sr,
    132 	ad1848_get_in_sr,
    133 	ad1848_set_out_sr,
    134 	ad1848_get_out_sr,
    135 	ad1848_query_encoding,
    136 	ad1848_set_encoding,
    137 	ad1848_get_encoding,
    138 	ad1848_set_precision,
    139 	ad1848_get_precision,
    140 	ad1848_set_channels,
    141 	ad1848_get_channels,
    142 	ad1848_round_blocksize,
    143 	wss_set_out_port,
    144 	wss_get_out_port,
    145 	wss_set_in_port,
    146 	wss_get_in_port,
    147 	ad1848_commit_settings,
    148 	ad1848_get_silence,
    149 	NULL,
    150 	NULL,
    151 	ad1848_dma_output,
    152 	ad1848_dma_input,
    153 	ad1848_halt_out_dma,
    154 	ad1848_halt_in_dma,
    155 	ad1848_cont_out_dma,
    156 	ad1848_cont_in_dma,
    157 	NULL,
    158 	wss_getdev,
    159 	wss_setfd,
    160 	wss_mixer_set_port,
    161 	wss_mixer_get_port,
    162 	wss_query_devinfo,
    163 	0,	/* not full-duplex */
    164 	0
    165 };
    166 
    167 #ifndef NEWCONFIG
    168 #define at_dma(flags, ptr, cc, chan)	isa_dmastart(flags, ptr, cc, chan)
    169 #endif
    170 
    171 struct cfdriver wsscd = {
    172 	NULL, "wss", wssprobe, wssattach, DV_DULL, sizeof(struct wss_softc)
    173 };
    174 
    175 /*
    176  * Probe for the Microsoft Sound System hardware.
    177  */
    178 int
    179 wssprobe(parent, self, aux)
    180     struct device *parent, *self;
    181     void *aux;
    182 {
    183     register struct wss_softc *sc = (void *)self;
    184     register struct isa_attach_args *ia = aux;
    185     register u_short iobase = ia->ia_iobase;
    186     static u_char interrupt_bits[12] = {
    187 	-1, -1, -1, -1, -1, -1, -1, 0x08, -1, 0x10, 0x18, 0x20
    188     };
    189     static u_char dma_bits[4] = {1, 2, 0, 3};
    190     char bits;
    191 
    192     if (!WSS_BASE_VALID(ia->ia_iobase)) {
    193 	printf("wss: configured iobase %d invalid\n", ia->ia_iobase);
    194 	return 0;
    195     }
    196 
    197     sc->wss_iobase = iobase;
    198 
    199     /* Is there an ad1848 chip at the WSS iobase ? */
    200     if (ad1848_probe(&sc->sc_ad1848) == 0)
    201 	return 0;
    202 
    203 #ifdef NEWCONFIG
    204     /*
    205      * If the IRQ wasn't compiled in, auto-detect it.
    206      */
    207     if (ia->ia_irq == IRQUNK) {
    208 	ia->ia_irq = isa_discoverintr(ad1848_forceintr, &sc->sc_ad1848);
    209 	if (!WSS_IRQ_VALID(ia->ia_irq)) {
    210 	    printf("wss: couldn't auto-detect interrupt");
    211 	    return 0;
    212 	}
    213     }
    214     else
    215 #endif
    216     ia->ia_iosize = WSS_NPORT;
    217 
    218     /* Setup WSS interrupt and DMA */
    219     if ((bits = interrupt_bits[sc->wss_irq]) == -1) {
    220 	    printf("wss: invalid interrupt configuration (irq=%d)\n", sc->wss_irq);
    221 	    return 0;
    222     }
    223 
    224 #if 0
    225     /* XXX Dual-DMA */
    226     outb(sc->wss_iobase+WSS_CONFIG, (bits | 0x40));
    227     if ((inb(sc->wss_iobase+WSS_STATUS) & 0x40) == 0)
    228 	printf("wss: IRQ?\n");
    229 #endif
    230     outb(sc->wss_iobase+WSS_CONFIG, (bits | dma_bits[sc->wss_drq]));
    231 
    232     return 1;
    233 }
    234 
    235 /*
    236  * Attach hardware to driver, attach hardware driver to audio
    237  * pseudo-device driver .
    238  */
    239 void
    240 wssattach(parent, self, aux)
    241     struct device *parent, *self;
    242     void *aux;
    243 {
    244     register struct wss_softc *sc = (struct wss_softc *)self;
    245     struct isa_attach_args *ia = (struct isa_attach_args *)aux;
    246     register u_short iobase = ia->ia_iobase;
    247 
    248     sc->wss_iobase = iobase;
    249     sc->wss_drq = ia->ia_drq;
    250 
    251 #ifdef NEWCONFIG
    252     isa_establish(&sc->sc_id, &sc->sc_dev);
    253 #endif
    254     sc->sc_ih = isa_intr_establish(ia->ia_irq, ISA_IST_EDGE, ISA_IPL_BIO,
    255 	ad1848_intr, &sc->sc_ad1848);
    256 
    257     ad1848_attach(&sc->sc_ad1848);
    258 
    259     printf(" (vers %d)", inb(sc->wss_iobase+WSS_STATUS) & 0x1f);
    260     printf("\n");
    261 
    262     sc->sc_ad1848.parent = sc;
    263 
    264     if (audio_hardware_attach(&wss_hw_if, &sc->sc_ad1848) != 0)
    265 	printf("wss: could not attach to audio pseudo-device driver\n");
    266 }
    267 
    268 static int
    269 wss_to_vol(cp, vol)
    270     mixer_ctrl_t *cp;
    271     struct ad1848_volume *vol;
    272 {
    273     if (cp->un.value.num_channels == 1) {
    274 	vol->left = vol->right = cp->un.value.level[AUDIO_MIXER_LEVEL_MONO];
    275 	return(1);
    276     }
    277     else if (cp->un.value.num_channels == 2) {
    278 	vol->left  = cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT];
    279 	vol->right = cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT];
    280 	return(1);
    281     }
    282     return(0);
    283 }
    284 
    285 static int
    286 wss_from_vol(cp, vol)
    287     mixer_ctrl_t *cp;
    288     struct ad1848_volume *vol;
    289 {
    290     if (cp->un.value.num_channels == 1) {
    291 	cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] = vol->left;
    292 	return(1);
    293     }
    294     else if (cp->un.value.num_channels == 2) {
    295 	cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT] = vol->left;
    296 	cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] = vol->right;
    297 	return(1);
    298     }
    299     return(0);
    300 }
    301 
    302 int
    303 wssopen(dev, flags)
    304     dev_t dev;
    305     int flags;
    306 {
    307     struct wss_softc *sc;
    308     int unit = AUDIOUNIT(dev);
    309 
    310     if (unit >= wsscd.cd_ndevs)
    311 	return ENODEV;
    312 
    313     sc = wsscd.cd_devs[unit];
    314     if (!sc)
    315 	return ENXIO;
    316 
    317     return ad1848_open(&sc->sc_ad1848, dev, flags);
    318 }
    319 
    320 int
    321 wss_getdev(addr, retp)
    322     void *addr;
    323     struct audio_device *retp;
    324 {
    325     *retp = wss_device;
    326     return 0;
    327 }
    328 
    329 int
    330 wss_setfd(addr, flag)
    331     void *addr;
    332     int flag;
    333 {
    334     /* Can't do full-duplex */
    335     return(ENOTTY);
    336 }
    337 
    338 
    339 int
    340 wss_set_out_port(addr, port)
    341     void *addr;
    342     int port;
    343 {
    344     DPRINTF(("wss_set_out_port:\n"));
    345     return(EINVAL);
    346 }
    347 
    348 int
    349 wss_get_out_port(addr)
    350     void *addr;
    351 {
    352     DPRINTF(("wss_get_out_port:\n"));
    353     return(EINVAL);
    354 }
    355 
    356 int
    357 wss_set_in_port(addr, port)
    358     void *addr;
    359     int port;
    360 {
    361     register struct ad1848_softc *ac = addr;
    362     register struct wss_softc *sc = ac->parent;
    363 
    364     DPRINTF(("wss_set_in_port: %d\n", port));
    365 
    366     switch(port) {
    367     case WSS_MIC_IN_LVL:
    368 	port = MIC_IN_PORT;
    369 	break;
    370     case WSS_LINE_IN_LVL:
    371 	port = LINE_IN_PORT;
    372 	break;
    373     case WSS_DAC_LVL:
    374 	port = DAC_IN_PORT;
    375 	break;
    376     default:
    377 	return(EINVAL);
    378 	/*NOTREACHED*/
    379     }
    380 
    381     return(ad1848_set_rec_port(ac, port));
    382 }
    383 
    384 int
    385 wss_get_in_port(addr)
    386     void *addr;
    387 {
    388     register struct ad1848_softc *ac = addr;
    389     register struct wss_softc *sc = ac->parent;
    390     int port = WSS_MIC_IN_LVL;
    391 
    392     switch(ad1848_get_rec_port(ac)) {
    393     case MIC_IN_PORT:
    394 	port = WSS_MIC_IN_LVL;
    395 	break;
    396     case LINE_IN_PORT:
    397 	port = WSS_LINE_IN_LVL;
    398 	break;
    399     case DAC_IN_PORT:
    400 	port = WSS_DAC_LVL;
    401 	break;
    402     }
    403 
    404     DPRINTF(("wss_get_in_port: %d\n", port));
    405 
    406     return(port);
    407 }
    408 
    409 int
    410 wss_mixer_set_port(addr, cp)
    411     void *addr;
    412     mixer_ctrl_t *cp;
    413 {
    414     register struct ad1848_softc *ac = addr;
    415     register struct wss_softc *sc = ac->parent;
    416     struct ad1848_volume vol;
    417     u_char eq;
    418     int error = EINVAL;
    419 
    420     DPRINTF(("wss_mixer_set_port: dev=%d type=%d\n", cp->dev, cp->type));
    421 
    422     switch (cp->dev) {
    423     case WSS_MIC_IN_LVL:	/* Microphone */
    424 	if (cp->type == AUDIO_MIXER_VALUE) {
    425 	    if (wss_to_vol(cp, &vol))
    426 		error = ad1848_set_aux2_gain(ac, &vol);
    427 	}
    428 	break;
    429 
    430     case WSS_MIC_IN_MUTE:	/* Microphone */
    431 	if (cp->type == AUDIO_MIXER_ENUM) {
    432 	    sc->mic_mute = cp->un.ord;
    433 	    DPRINTF(("mic mute %d\n", cp->un.ord));
    434 	    error = 0;
    435 	}
    436 	break;
    437 
    438     case WSS_LINE_IN_LVL:	/* linein/CD */
    439 	if (cp->type == AUDIO_MIXER_VALUE) {
    440 	    if (wss_to_vol(cp, &vol))
    441 		error = ad1848_set_aux1_gain(ac, &vol);
    442 	}
    443 	break;
    444 
    445     case WSS_LINE_IN_MUTE:	/* linein/CD */
    446 	if (cp->type == AUDIO_MIXER_ENUM) {
    447 	    sc->cd_mute = cp->un.ord;
    448 	    DPRINTF(("CD mute %d\n", cp->un.ord));
    449 	    error = 0;
    450 	}
    451 	break;
    452 
    453     case WSS_DAC_LVL:		/* dac out */
    454 	if (cp->type == AUDIO_MIXER_VALUE) {
    455 	    if (wss_to_vol(cp, &vol))
    456 		error = ad1848_set_out_gain(ac, &vol);
    457 	}
    458 	break;
    459 
    460     case WSS_DAC_MUTE:		/* dac out */
    461 	if (cp->type == AUDIO_MIXER_ENUM) {
    462 	    sc->dac_mute = cp->un.ord;
    463 	    DPRINTF(("DAC mute %d\n", cp->un.ord));
    464 	    error = 0;
    465 	}
    466 	break;
    467 
    468     case WSS_REC_LVL:		/* record level */
    469 	if (cp->type == AUDIO_MIXER_VALUE) {
    470 	    if (wss_to_vol(cp, &vol))
    471 		error = ad1848_set_rec_gain(ac, &vol);
    472 	}
    473 	break;
    474 
    475     case WSS_RECORD_SOURCE:
    476 	if (cp->type == AUDIO_MIXER_ENUM) {
    477 	    error = ad1848_set_rec_port(ac, cp->un.ord);
    478 	}
    479 	break;
    480 
    481     case WSS_MON_LVL:
    482 	if (cp->type == AUDIO_MIXER_VALUE && cp->un.value.num_channels == 1) {
    483 	    vol.left  = cp->un.value.level[AUDIO_MIXER_LEVEL_MONO];
    484 	    error = ad1848_set_mon_gain(ac, &vol);
    485 	}
    486 	break;
    487 
    488     default:
    489 	    return ENXIO;
    490 	    /*NOTREACHED*/
    491     }
    492 
    493     return 0;
    494 }
    495 
    496 int
    497 wss_mixer_get_port(addr, cp)
    498     void *addr;
    499     mixer_ctrl_t *cp;
    500 {
    501     register struct ad1848_softc *ac = addr;
    502     register struct wss_softc *sc = ac->parent;
    503     struct ad1848_volume vol;
    504     u_char eq;
    505     int error = EINVAL;
    506 
    507     DPRINTF(("wss_mixer_get_port: port=%d\n", cp->dev));
    508 
    509     switch (cp->dev) {
    510     case WSS_MIC_IN_LVL:	/* Microphone */
    511 	if (cp->type == AUDIO_MIXER_VALUE) {
    512 	    error = ad1848_get_aux2_gain(ac, &vol);
    513 	    if (!error)
    514 		wss_from_vol(cp, &vol);
    515 	}
    516 	break;
    517 
    518     case WSS_MIC_IN_MUTE:
    519 	if (cp->type == AUDIO_MIXER_ENUM) {
    520 	    cp->un.ord = sc->mic_mute;
    521 	    error = 0;
    522 	}
    523 	break;
    524 
    525     case WSS_LINE_IN_LVL:	/* linein/CD */
    526 	if (cp->type == AUDIO_MIXER_VALUE) {
    527 	    error = ad1848_get_aux1_gain(ac, &vol);
    528 	    if (!error)
    529 		wss_from_vol(cp, &vol);
    530 	}
    531 	break;
    532 
    533     case WSS_LINE_IN_MUTE:
    534 	if (cp->type == AUDIO_MIXER_ENUM) {
    535 	    cp->un.ord = sc->cd_mute;
    536 	    error = 0;
    537 	}
    538 	break;
    539 
    540     case WSS_DAC_LVL:		/* dac out */
    541 	if (cp->type == AUDIO_MIXER_VALUE) {
    542 	    error = ad1848_get_out_gain(ac, &vol);
    543 	    if (!error)
    544 		wss_from_vol(cp, &vol);
    545 	}
    546 	break;
    547 
    548     case WSS_DAC_MUTE:
    549 	if (cp->type == AUDIO_MIXER_ENUM) {
    550 	    cp->un.ord = sc->dac_mute;
    551 	    error = 0;
    552 	}
    553 	break;
    554 
    555     case WSS_REC_LVL:		/* record level */
    556 	if (cp->type == AUDIO_MIXER_VALUE) {
    557 	    error = ad1848_get_rec_gain(ac, &vol);
    558 	    if (!error)
    559 		wss_from_vol(cp, &vol);
    560 	}
    561 	break;
    562 
    563     case WSS_RECORD_SOURCE:
    564 	if (cp->type == AUDIO_MIXER_ENUM) {
    565 	    cp->un.ord = ad1848_get_rec_port(ac);
    566 	    error = 0;
    567 	}
    568 	break;
    569 
    570     case WSS_MON_LVL:		/* monitor level */
    571 	if (cp->type == AUDIO_MIXER_VALUE && cp->un.value.num_channels == 1) {
    572 	    error = ad1848_get_mon_gain(ac, &vol);
    573 	    if (!error)
    574 		cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] = vol.left;
    575 	}
    576 	break;
    577 
    578     default:
    579 	error = ENXIO;
    580 	break;
    581     }
    582 
    583     return(error);
    584 }
    585 
    586 int
    587 wss_query_devinfo(addr, dip)
    588     void *addr;
    589     register mixer_devinfo_t *dip;
    590 {
    591     register struct ad1848_softc *ac = addr;
    592     register struct wss_softc *sc = ac->parent;
    593 
    594     DPRINTF(("wss_query_devinfo: index=%d\n", dip->index));
    595 
    596     switch(dip->index) {
    597     case WSS_MIC_IN_LVL:	/* Microphone */
    598 	dip->type = AUDIO_MIXER_VALUE;
    599 	dip->mixer_class = WSS_INPUT_CLASS;
    600 	dip->prev = AUDIO_MIXER_LAST;
    601 	dip->next = WSS_MIC_IN_MUTE;
    602 	strcpy(dip->label.name, AudioNmicrophone);
    603 	dip->un.v.num_channels = 2;
    604 	strcpy(dip->un.v.units.name, AudioNvolume);
    605 	break;
    606 
    607     case WSS_LINE_IN_LVL:	/* line/CD */
    608 	dip->type = AUDIO_MIXER_VALUE;
    609 	dip->mixer_class = WSS_INPUT_CLASS;
    610 	dip->prev = AUDIO_MIXER_LAST;
    611 	dip->next = WSS_LINE_IN_MUTE;
    612 	strcpy(dip->label.name, AudioNcd);
    613 	dip->un.v.num_channels = 2;
    614 	strcpy(dip->un.v.units.name, AudioNvolume);
    615 	break;
    616 
    617     case WSS_DAC_LVL:		/*  dacout */
    618 	dip->type = AUDIO_MIXER_VALUE;
    619 	dip->mixer_class = WSS_INPUT_CLASS;
    620 	dip->prev = AUDIO_MIXER_LAST;
    621 	dip->next = WSS_DAC_MUTE;
    622 	strcpy(dip->label.name, AudioNdac);
    623 	dip->un.v.num_channels = 2;
    624 	strcpy(dip->un.v.units.name, AudioNvolume);
    625 	break;
    626 
    627     case WSS_REC_LVL:	/* record level */
    628 	dip->type = AUDIO_MIXER_VALUE;
    629 	dip->mixer_class = WSS_RECORD_CLASS;
    630 	dip->prev = AUDIO_MIXER_LAST;
    631 	dip->next = WSS_RECORD_SOURCE;
    632 	strcpy(dip->label.name, AudioNrecord);
    633 	dip->un.v.num_channels = 2;
    634 	strcpy(dip->un.v.units.name, AudioNvolume);
    635 	break;
    636 
    637     case WSS_MON_LVL:	/* monitor level */
    638 	dip->type = AUDIO_MIXER_VALUE;
    639 	dip->mixer_class = WSS_MONITOR_CLASS;
    640 	dip->next = dip->prev = AUDIO_MIXER_LAST;
    641 	strcpy(dip->label.name, AudioNmonitor);
    642 	dip->un.v.num_channels = 1;
    643 	strcpy(dip->un.v.units.name, AudioNvolume);
    644 	break;
    645 
    646     case WSS_INPUT_CLASS:			/* input class descriptor */
    647 	dip->type = AUDIO_MIXER_CLASS;
    648 	dip->mixer_class = WSS_INPUT_CLASS;
    649 	dip->next = dip->prev = AUDIO_MIXER_LAST;
    650 	strcpy(dip->label.name, AudioCInputs);
    651 	break;
    652 
    653     case WSS_MONITOR_CLASS:			/* monitor class descriptor */
    654 	dip->type = AUDIO_MIXER_CLASS;
    655 	dip->mixer_class = WSS_MONITOR_CLASS;
    656 	dip->next = dip->prev = AUDIO_MIXER_LAST;
    657 	strcpy(dip->label.name, AudioNmonitor);
    658 	break;
    659 
    660     case WSS_RECORD_CLASS:			/* record source class */
    661 	dip->type = AUDIO_MIXER_CLASS;
    662 	dip->mixer_class = WSS_RECORD_CLASS;
    663 	dip->next = dip->prev = AUDIO_MIXER_LAST;
    664 	strcpy(dip->label.name, AudioNrecord);
    665 	break;
    666 
    667     case WSS_MIC_IN_MUTE:
    668 	dip->mixer_class = WSS_INPUT_CLASS;
    669 	dip->type = AUDIO_MIXER_ENUM;
    670 	dip->prev = WSS_MIC_IN_LVL;
    671 	dip->next = AUDIO_MIXER_LAST;
    672 	goto mute;
    673 
    674     case WSS_LINE_IN_MUTE:
    675 	dip->mixer_class = WSS_INPUT_CLASS;
    676 	dip->type = AUDIO_MIXER_ENUM;
    677 	dip->prev = WSS_LINE_IN_LVL;
    678 	dip->next = AUDIO_MIXER_LAST;
    679 	goto mute;
    680 
    681     case WSS_DAC_MUTE:
    682 	dip->mixer_class = WSS_INPUT_CLASS;
    683 	dip->type = AUDIO_MIXER_ENUM;
    684 	dip->prev = WSS_DAC_LVL;
    685 	dip->next = AUDIO_MIXER_LAST;
    686     mute:
    687 	strcpy(dip->label.name, AudioNmute);
    688 	dip->un.e.num_mem = 2;
    689 	strcpy(dip->un.e.member[0].label.name, AudioNoff);
    690 	dip->un.e.member[0].ord = 0;
    691 	strcpy(dip->un.e.member[1].label.name, AudioNon);
    692 	dip->un.e.member[1].ord = 1;
    693 	break;
    694 
    695     case WSS_RECORD_SOURCE:
    696 	dip->mixer_class = WSS_RECORD_CLASS;
    697 	dip->type = AUDIO_MIXER_ENUM;
    698 	dip->prev = WSS_REC_LVL;
    699 	dip->next = AUDIO_MIXER_LAST;
    700 	strcpy(dip->label.name, AudioNsource);
    701 	dip->un.e.num_mem = 3;
    702 	strcpy(dip->un.e.member[0].label.name, AudioNmicrophone);
    703 	dip->un.e.member[0].ord = WSS_MIC_IN_LVL;
    704 	strcpy(dip->un.e.member[1].label.name, AudioNcd);
    705 	dip->un.e.member[1].ord = WSS_LINE_IN_LVL;
    706 	strcpy(dip->un.e.member[2].label.name, AudioNdac);
    707 	dip->un.e.member[2].ord = WSS_DAC_LVL;
    708 	break;
    709 
    710     default:
    711 	return ENXIO;
    712 	/*NOTREACHED*/
    713     }
    714     DPRINTF(("AUDIO_MIXER_DEVINFO: name=%s\n", dip->label.name));
    715 
    716     return 0;
    717 }
    718