text: /*      $OpenBSD: sv.c,v 1.6 1999/01/02 00:02:49 niklas Exp $ */
  
  /*
   * Copyright (c) 1998 Constantine Paul Sapuntzakis
   * All rights reserved
   *
   * Author: Constantine Paul Sapuntzakis (csapuntz@cvs.openbsd.org)
   *
   * 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. The author's name or those of the contributors may be used to
   *    endorse or promote products derived from this software without 
   *    specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) 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 FOUNDATION 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.
   */
  
  /*
   * S3 SonicVibes driver
   *   Heavily based on the eap driver by Lennart Augustsson
   */
  
  #include <sys/param.h>
  #include <sys/systm.h>
  #include <sys/kernel.h>
  #include <sys/malloc.h>
  #include <sys/device.h>
  
  #include <dev/pci/pcireg.h>
  #include <dev/pci/pcivar.h>
  #include <dev/pci/pcidevs.h>
  
  #include <sys/audioio.h>
  #include <dev/audio_if.h>
  #include <dev/mulaw.h>
  #include <dev/auconv.h>
  
  #include <dev/ic/i8237reg.h>
  #include <dev/ic/s3_617.h>
  
  
  #include <machine/bus.h>
  
  /* NetBSD 1.3 backwards compatibility */
  #ifndef BUS_DMA_COHERENT
  #define BUS_DMA_COHERENT 0	/* XXX */
  struct        cfdriver sv_cd = {
        NULL, "sv", DV_DULL
  };
  #endif
  #ifdef AUDIO_DEBUG
  #define DPRINTF(x)	if (svdebug) printf x
  #define DPRINTFN(n,x)	if (svdebug>(n)) printf x
  static int	svdebug = 100;
  #else
  #define DPRINTF(x)
  #define DPRINTFN(n,x)
  #endif
  
  #define __BROKEN_INDIRECT_CONFIG
  #ifdef __BROKEN_INDIRECT_CONFIG
  int	sv_match __P((struct device *, void *, void *));
  #else
  int	sv_match __P((struct device *, struct cfdata *, void *));
  #endif
  static void	sv_attach __P((struct device *, struct device *, void *));
  int	sv_intr __P((void *));
  
  struct sv_dma {
  	bus_dmamap_t map;
          caddr_t addr;
          bus_dma_segment_t segs[1];
          int nsegs;
          size_t size;
          struct sv_dma *next;
  };
  #define DMAADDR(map) ((map)->segs[0].ds_addr)
  #define KERNADDR(map) ((void *)((map)->addr))
  
  enum {
    SV_DMAA_CONFIGURED = 1,
    SV_DMAC_CONFIGURED = 2,
    SV_DMAA_TRIED_CONFIGURE = 4,
    SV_DMAC_TRIED_CONFIGURE = 8
  };
  
  struct sv_softc {
  	struct device sc_dev;		/* base device */
  	void *sc_ih;			/* interrupt vectoring */
  
          pci_chipset_tag_t sc_pci_chipset_tag;
          pcitag_t  sc_pci_tag;
  
  	bus_space_tag_t sc_iot;
  	bus_space_handle_t sc_ioh;
  	bus_space_handle_t sc_dmaa_ioh;
  	bus_space_handle_t sc_dmac_ioh;
  	bus_dma_tag_t sc_dmatag;	/* DMA tag */
  
          struct sv_dma *sc_dmas;
  
  	void	(*sc_pintr)(void *);	/* dma completion intr handler */
  	void	*sc_parg;		/* arg for sc_intr() */
  
  	void	(*sc_rintr)(void *);	/* dma completion intr handler */
  	void	*sc_rarg;		/* arg for sc_intr() */
  	char	sc_enable;
          char    sc_trd;
  
          char    sc_dma_configured;
          u_int	sc_record_source;	/* recording source mask */
  };
  
  
  struct cfattach sv_ca = {
  	sizeof(struct sv_softc), sv_match, sv_attach
  };
  
  struct audio_device sv_device = {
  	"S3 SonicVibes",
  	"",
  	"sv"
  };
  
  #define ARRAY_SIZE(foo)  ((sizeof(foo)) / sizeof(foo[0]))
  
  int	sv_allocmem __P((struct sv_softc *, size_t, size_t, struct sv_dma *));
  int	sv_freemem __P((struct sv_softc *, struct sv_dma *));
  
  int	sv_open __P((void *, int));
  void	sv_close __P((void *));
  int	sv_query_encoding __P((void *, struct audio_encoding *));
  int	sv_set_params __P((void *, int, int, struct audio_params *, struct audio_params *));
  int	sv_round_blocksize __P((void *, int));
  int	sv_dma_init_output __P((void *, void *, int));
  int	sv_dma_init_input __P((void *, void *, int));
  int	sv_dma_output __P((void *, void *, int, void (*)(void *), void*));
  int	sv_dma_input __P((void *, void *, int, void (*)(void *), void*));
  int	sv_halt_in_dma __P((void *));
  int	sv_halt_out_dma __P((void *));
  int	sv_getdev __P((void *, struct audio_device *));
  int	sv_mixer_set_port __P((void *, mixer_ctrl_t *));
  int	sv_mixer_get_port __P((void *, mixer_ctrl_t *));
  int	sv_query_devinfo __P((void *, mixer_devinfo_t *));
  void   *sv_malloc __P((void *, u_long, int, int));
  void	sv_free __P((void *, void *, int));
  u_long	sv_round __P((void *, u_long));
  int	sv_mappage __P((void *, void *, int, int));
  int	sv_get_props __P((void *));
  
  void    sv_dumpregs __P((struct sv_softc *sc));
  
  struct audio_hw_if sv_hw_if = {
  	sv_open,
  	sv_close,
  	NULL,
  	sv_query_encoding,
  	sv_set_params,
  	sv_round_blocksize,
  	NULL,
  	sv_dma_init_output,
  	sv_dma_init_input,
  	sv_dma_output,
  	sv_dma_input,
  	sv_halt_out_dma,
  	sv_halt_in_dma,
  	NULL,
  	sv_getdev,
  	NULL,
  	sv_mixer_set_port,
  	sv_mixer_get_port,
  	sv_query_devinfo,
  	sv_malloc,
  	sv_free,
  	sv_round,
  	sv_mappage,
  	sv_get_props,
  	NULL,
  	NULL
  };
  
  
  static __inline__ u_int8_t sv_read __P((struct sv_softc *, u_int8_t));
  static __inline__ u_int8_t sv_read_indirect __P((struct sv_softc *, u_int8_t));
  static __inline__ void sv_write __P((struct sv_softc *, u_int8_t, u_int8_t ));
  static __inline__ void sv_write_indirect __P((struct sv_softc *, u_int8_t, u_int8_t ));
  static void sv_init_mixer __P((struct sv_softc *));
  
  static __inline__ void
  sv_write (sc, reg, val)
       struct sv_softc *sc;
       u_int8_t reg, val;
       
  {
    bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val);
  }
  
  static __inline__ u_int8_t
  sv_read (sc, reg)
       struct sv_softc *sc;
       u_int8_t reg;
       
  {
    return (bus_space_read_1(sc->sc_iot, sc->sc_ioh, reg));
  }
  
  static __inline__ u_int8_t
  sv_read_indirect (sc, reg)
       struct sv_softc *sc;
       u_int8_t reg;
  {
      u_int8_t iaddr = 0;
  
      if (sc->sc_trd > 0)
        iaddr |= SV_IADDR_TRD;
  
      iaddr |= (reg & SV_IADDR_MASK);
      sv_write (sc, SV_CODEC_IADDR, iaddr);
  
      return (sv_read(sc, SV_CODEC_IDATA));
  }
  
  static __inline__ void
  sv_write_indirect (sc, reg, val)
       struct sv_softc *sc;
       u_int8_t reg, val;
  {
      u_int8_t iaddr = 0;
  #ifdef DIAGNOSTIC
      if (reg > 0x3f) {
        printf ("Invalid register\n");
        return;
      }
  #endif
  
      if (reg == SV_DMA_DATA_FORMAT)
        iaddr |= SV_IADDR_MCE;
  
      if (sc->sc_trd > 0)
        iaddr |= SV_IADDR_TRD;
  
      iaddr |= (reg & SV_IADDR_MASK);
      sv_write (sc, SV_CODEC_IADDR, iaddr);
      sv_write (sc, SV_CODEC_IDATA, val);
  }
  
  int
  sv_match(parent, match, aux)
       struct device *parent;
       void *match, *aux;
  {
  	struct pci_attach_args *pa = aux;
  
  	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_S3 &&
  	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_S3_SONICVIBES)
  	  return (1);
  
  	return (0);
  }
  
  static void
  sv_attach(parent, self, aux)
       struct device *parent, *self;
       void *aux;
  
  {
    struct sv_softc *sc = (struct sv_softc *)self;
    struct pci_attach_args *pa = aux;
    pci_chipset_tag_t pc = pa->pa_pc;
    pci_intr_handle_t ih;
    bus_addr_t iobase;
    bus_size_t iosize;
    pcireg_t csr;
    char const *intrstr;
    u_int32_t  dmareg, dmaio; 
    u_int8_t   reg;
  
    printf ("\n");
  
    sc->sc_pci_chipset_tag = pc;
    sc->sc_pci_tag = pa->pa_tag;
  
    /* Map the enhanced port only */
    if (pci_io_find(pc, pa->pa_tag, SV_ENHANCED_PORTBASE_SLOT, 
  		  &iobase, &iosize)) {
      printf ("%s: Couldn't find enhanced synth I/O range\n", sc->sc_dev.dv_xname);
      return;
    }
  
    if (bus_space_map(sc->sc_iot, iobase, iosize, 0, &sc->sc_ioh)) {
        printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
        return;
    }
  
    sc->sc_dmatag = pa->pa_dmat;
  
    dmareg = pci_conf_read(pa->pa_pc, pa->pa_tag, SV_DMAA_CONFIG_OFF);
    iosize = 0x10;
    dmaio =  dmareg & ~(iosize - 1);
    
    if (dmaio) {
      dmareg &= 0xF;
      
      if (bus_space_map(sc->sc_iot, dmaio, iosize, 0, &sc->sc_dmaa_ioh)) {
        /* The BIOS assigned us some bad I/O address! Make sure to clear
           and disable this DMA before we enable the device */
        pci_conf_write(pa->pa_pc, pa->pa_tag, SV_DMAA_CONFIG_OFF, 0);
  
        printf ("%s: can't map DMA i/o space\n", sc->sc_dev.dv_xname);
        goto enable;
      }
  
      pci_conf_write(pa->pa_pc, pa->pa_tag, SV_DMAA_CONFIG_OFF,
  		   dmaio | dmareg | 
  		   SV_DMA_CHANNEL_ENABLE | SV_DMAA_EXTENDED_ADDR);
      sc->sc_dma_configured |= SV_DMAA_CONFIGURED;
    }
  
    dmareg = pci_conf_read(pa->pa_pc, pa->pa_tag, SV_DMAC_CONFIG_OFF);
    dmaio = dmareg & ~(iosize - 1);
    if (dmaio) {
      dmareg &= 0xF;
  
      if (bus_space_map(sc->sc_iot, dmaio, iosize, 0, &sc->sc_dmac_ioh)) {
        /* The BIOS assigned us some bad I/O address! Make sure to clear
           and disable this DMA before we enable the device */
        pci_conf_write (pa->pa_pc, pa->pa_tag, SV_DMAC_CONFIG_OFF, 
  		      dmareg & ~SV_DMA_CHANNEL_ENABLE); 
        printf ("%s: can't map DMA i/o space\n", sc->sc_dev.dv_xname);
        goto enable;
      }
  
      pci_conf_write(pa->pa_pc, pa->pa_tag, SV_DMAC_CONFIG_OFF, 
  		   dmaio | dmareg | SV_DMA_CHANNEL_ENABLE);
      sc->sc_dma_configured |= SV_DMAC_CONFIGURED;
    }
  
    /* Enable the device. */
   enable:
    csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
    pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
  		 csr | PCI_COMMAND_MASTER_ENABLE 
  		 /* | PCI_COMMAND_IO_ENABLE | PCI_COMMAND_PARITY_ENABLE */);
  
    sv_write_indirect(sc, SV_ANALOG_POWER_DOWN_CONTROL, 0);
    sv_write_indirect(sc, SV_DIGITAL_POWER_DOWN_CONTROL, 0);
  
    /* initialize codec registers */
    reg = sv_read(sc, SV_CODEC_CONTROL);
    reg |= SV_CTL_RESET;
    sv_write(sc, SV_CODEC_CONTROL, reg);
    delay(50);
  
    reg = sv_read(sc, SV_CODEC_CONTROL);
    reg &= ~SV_CTL_RESET;
    reg |= SV_CTL_INTA | SV_CTL_ENHANCED;
  
    /* This write clears the reset */
    sv_write(sc, SV_CODEC_CONTROL, reg);
    delay(50);
  
    /* This write actually shoves the new values in */
    sv_write(sc, SV_CODEC_CONTROL, reg);
  
    DPRINTF (("reg: %x\n", sv_read(sc, SV_CODEC_CONTROL)));
  
    /* Enable DMA interrupts */
    reg = sv_read(sc, SV_CODEC_INTMASK);
    reg &= ~(SV_INTMASK_DMAA | SV_INTMASK_DMAC);
    reg |= SV_INTMASK_UD | SV_INTMASK_SINT | SV_INTMASK_MIDI;
    sv_write(sc, SV_CODEC_INTMASK, reg);
  
    sv_read(sc, SV_CODEC_STATUS);
  
    sc->sc_trd = 0;
    sc->sc_enable = 0;
  
    /* Map and establish the interrupt. */
    if (pci_intr_map(pc, pa->pa_intrtag, pa->pa_intrpin,
  		   pa->pa_intrline, &ih)) {
      printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname);
      return;
    }
    intrstr = pci_intr_string(pc, ih);
    sc->sc_ih = pci_intr_establish(pc, ih, IPL_AUDIO, sv_intr, sc,
  				 sc->sc_dev.dv_xname);
    if (sc->sc_ih == NULL) {
      printf("%s: couldn't establish interrupt",
  	   sc->sc_dev.dv_xname);
      if (intrstr != NULL)
        printf(" at %s", intrstr);
      printf("\n");
      return;
    }
    printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
  
    sv_init_mixer(sc);
  
    audio_attach_mi(&sv_hw_if, sc, &sc->sc_dev);
  }
  
  #ifdef AUDIO_DEBUG
  void
  sv_dumpregs(sc)
       struct sv_softc *sc;
  {
    int idx;
  
    { int idx;
    for (idx = 0; idx < 0x50; idx += 4) {
      printf ("%02x = %x\n", idx, pci_conf_read(sc->sc_pci_chipset_tag,
              sc->sc_pci_tag, idx));
    }
    }
  
    for (idx = 0; idx < 6; idx++) {
      printf ("REG %02x = %02x\n", idx, sv_read(sc, idx));
    }
  
    for (idx = 0; idx < 0x32; idx++) {
      printf ("IREG %02x = %02x\n", idx, sv_read_indirect(sc, idx));
    }
  
    for (idx = 0; idx < 0x10; idx++) {
      printf ("DMA %02x = %02x\n", idx, 
  	    bus_space_read_1(sc->sc_iot, sc->sc_dmaa_ioh, idx));
    }
  
    return;
  }
  #endif
  
  int
  sv_intr(p)
  	void *p;
  {
    struct sv_softc *sc = p;
    u_int8_t intr;
  
    intr = sv_read(sc, SV_CODEC_STATUS);
  
    if (!(intr & (SV_INTSTATUS_DMAA | SV_INTSTATUS_DMAC))) 
      return (0);
  
    if (intr & SV_INTSTATUS_DMAA) {
      if (sc->sc_pintr)
        sc->sc_pintr(sc->sc_parg);
    }
  
    if (intr & SV_INTSTATUS_DMAC) {
      if (sc->sc_rintr)
        sc->sc_rintr(sc->sc_rarg);
    }
  
    return (1);
  }
  
  int
  sv_allocmem(sc, size, align, p)
  	struct sv_softc *sc;
  	size_t size;
  	size_t align;
          struct sv_dma *p;
  {
  	int error;
  
  	p->size = size;
  	error = bus_dmamem_alloc(sc->sc_dmatag, p->size, align, 0,
  				 p->segs, ARRAY_SIZE(p->segs),
  				 &p->nsegs, BUS_DMA_NOWAIT);
  	if (error)
  		return (error);
  
  	error = bus_dmamem_map(sc->sc_dmatag, p->segs, p->nsegs, p->size, 
  			       &p->addr, BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
  	if (error)
  		goto free;
  
  	error = bus_dmamap_create(sc->sc_dmatag, p->size, 1, p->size,
  				  0, BUS_DMA_NOWAIT, &p->map);
  	if (error)
  		goto unmap;
  
  	error = bus_dmamap_load(sc->sc_dmatag, p->map, p->addr, p->size, NULL, 
  				BUS_DMA_NOWAIT);
  	if (error)
  		goto destroy;
  	return (0);
  
  destroy:
  	bus_dmamap_destroy(sc->sc_dmatag, p->map);
  unmap:
  	bus_dmamem_unmap(sc->sc_dmatag, p->addr, p->size);
  free:
  	bus_dmamem_free(sc->sc_dmatag, p->segs, p->nsegs);
  	return (error);
  }
  
  int
  sv_freemem(sc, p)
  	struct sv_softc *sc;
          struct sv_dma *p;
  {
  	bus_dmamap_unload(sc->sc_dmatag, p->map);
  	bus_dmamap_destroy(sc->sc_dmatag, p->map);
  	bus_dmamem_unmap(sc->sc_dmatag, p->addr, p->size);
  	bus_dmamem_free(sc->sc_dmatag, p->segs, p->nsegs);
  	return (0);
  }
  
  int
  sv_open(addr, flags)
  	void *addr;
  	int flags;
  {
  
      struct sv_softc *sc = addr;
      int  intr_mask = 0;
      u_int8_t reg;
  
      /* Map the DMA channels, if necessary */
      if (!(sc->sc_dma_configured & SV_DMAA_CONFIGURED)) {
  	/* XXX - there seems to be no general way to find an
  	   I/O range */
  	int dmaio;
  	int iosize = 0x10;
  
  	if (sc->sc_dma_configured & SV_DMAA_TRIED_CONFIGURE)
  	    return (ENXIO);
  
  	for (dmaio = 0xa000; dmaio < 0xb000; dmaio += iosize) {
  	    if (!bus_space_map(sc->sc_iot, dmaio, iosize, 0, 
  			      &sc->sc_dmaa_ioh)) {
  		goto found_dmaa;
  	    }
  	}
  
  	sc->sc_dma_configured |= SV_DMAA_TRIED_CONFIGURE;
  	return (ENXIO);
      found_dmaa:
  	  
  	pci_conf_write(sc->sc_pci_chipset_tag, sc->sc_pci_tag,
  		       SV_DMAA_CONFIG_OFF, 
  		       dmaio | SV_DMA_CHANNEL_ENABLE 
  		       | SV_DMAA_EXTENDED_ADDR);
  
  	sc->sc_dma_configured |= SV_DMAA_CONFIGURED;
  	intr_mask = 1;
      }
  
      if (!(sc->sc_dma_configured & SV_DMAC_CONFIGURED)) {
  	/* XXX - there seems to be no general way to find an
  	   I/O range */
  	int dmaio;
  	int iosize = 0x10;
  
  	if (sc->sc_dma_configured & SV_DMAC_TRIED_CONFIGURE)
  	    return (ENXIO);
  
  	for (dmaio = 0xa000; dmaio < 0xb000; dmaio += iosize) {
  	    if (!bus_space_map(sc->sc_iot, dmaio, iosize, 0, 
  			      &sc->sc_dmac_ioh)) {
  		goto found_dmac;
  	    }
  	}
  
  	sc->sc_dma_configured |= SV_DMAC_TRIED_CONFIGURE;	    
  	return (ENXIO);
      found_dmac:
  	  
  	pci_conf_write(sc->sc_pci_chipset_tag, sc->sc_pci_tag,
  		       SV_DMAC_CONFIG_OFF, 
  		       dmaio | SV_DMA_CHANNEL_ENABLE);
  
  	sc->sc_dma_configured |= SV_DMAC_CONFIGURED;
  	intr_mask = 1;
      }
  
      /* Make sure DMA interrupts are enabled */
      if (intr_mask) {
  	reg = sv_read(sc, SV_CODEC_INTMASK);
  	reg &= ~(SV_INTMASK_DMAA | SV_INTMASK_DMAC);
  	reg |= SV_INTMASK_UD | SV_INTMASK_SINT | SV_INTMASK_MIDI;
  	sv_write(sc, SV_CODEC_INTMASK, reg);
      }
  
      sc->sc_pintr = 0;
      sc->sc_rintr = 0;
  
      return (0);
  }
  
  /*
   * Close function is called at splaudio().
   */
  void
  sv_close(addr)
  	void *addr;
  {
  	struct sv_softc *sc = addr;
      
          sv_halt_in_dma(sc);
          sv_halt_out_dma(sc);
  
          sc->sc_pintr = 0;
          sc->sc_rintr = 0;
  }
  
  int
  sv_query_encoding(addr, fp)
  	void *addr;
  	struct audio_encoding *fp;
  {
  	switch (fp->index) {
  	case 0:
  		strcpy(fp->name, AudioEulinear);
  		fp->encoding = AUDIO_ENCODING_ULINEAR;
  		fp->precision = 8;
  		fp->flags = 0;
  		return (0);
  	case 1:
  		strcpy(fp->name, AudioEmulaw);
  		fp->encoding = AUDIO_ENCODING_ULAW;
  		fp->precision = 8;
  		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
  		return (0);
  	case 2:
  		strcpy(fp->name, AudioEalaw);
  		fp->encoding = AUDIO_ENCODING_ALAW;
  		fp->precision = 8;
  		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
  		return (0);
  	case 3:
  		strcpy(fp->name, AudioEslinear);
  		fp->encoding = AUDIO_ENCODING_SLINEAR;
  		fp->precision = 8;
  		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
  		return (0);
          case 4:
  		strcpy(fp->name, AudioEslinear_le);
  		fp->encoding = AUDIO_ENCODING_SLINEAR_LE;
  		fp->precision = 16;
  		fp->flags = 0;
  		return (0);
  	case 5:
  		strcpy(fp->name, AudioEulinear_le);
  		fp->encoding = AUDIO_ENCODING_ULINEAR_LE;
  		fp->precision = 16;
  		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
  		return (0);
  	case 6:
  		strcpy(fp->name, AudioEslinear_be);
  		fp->encoding = AUDIO_ENCODING_SLINEAR_BE;
  		fp->precision = 16;
  		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
  		return (0);
  	case 7:
  		strcpy(fp->name, AudioEulinear_be);
  		fp->encoding = AUDIO_ENCODING_ULINEAR_BE;
  		fp->precision = 16;
  		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
  		return (0);
  	default:
  		return (EINVAL);
  	}
  }
  
  int
  sv_set_params(addr, setmode, usemode, p, r)
  	void *addr;
  	int setmode, usemode;
  	struct audio_params *p, *r;
  {
  	struct sv_softc *sc = addr;
  	void (*pswcode) __P((void *, u_char *buf, int cnt));
  	void (*rswcode) __P((void *, u_char *buf, int cnt));
          u_int32_t mode, val;
          u_int8_t reg;
  	
          pswcode = rswcode = 0;
          switch (p->encoding) {
          case AUDIO_ENCODING_SLINEAR_BE:
          	if (p->precision == 16)
                  	rswcode = pswcode = swap_bytes;
  		else
  			pswcode = rswcode = change_sign8;
  		break;
          case AUDIO_ENCODING_SLINEAR_LE:
          	if (p->precision != 16)
  			pswcode = rswcode = change_sign8;
          	break;
          case AUDIO_ENCODING_ULINEAR_BE:
          	if (p->precision == 16) {
  			pswcode = swap_bytes_change_sign16;
  			rswcode = change_sign16_swap_bytes;
  		}
  		break;
          case AUDIO_ENCODING_ULINEAR_LE:
          	if (p->precision == 16)
  			pswcode = rswcode = change_sign16;
          	break;
          case AUDIO_ENCODING_ULAW:
          	pswcode = mulaw_to_ulinear8;
                  rswcode = ulinear8_to_mulaw;
                  break;
          case AUDIO_ENCODING_ALAW:
                  pswcode = alaw_to_ulinear8;
                  rswcode = ulinear8_to_alaw;
                  break;
          default:
          	return (EINVAL);
          }
  
  	if (p->precision == 16)
  		mode = SV_DMAA_FORMAT16 | SV_DMAC_FORMAT16;
  	else
  		mode = 0;
          if (p->channels == 2)
          	mode |= SV_DMAA_STEREO | SV_DMAC_STEREO;
  	else if (p->channels != 1)
  		return (EINVAL);
          if (p->sample_rate < 2000 || p->sample_rate > 48000)
          	return (EINVAL);
  
          p->sw_code = pswcode;
          r->sw_code = rswcode;
  
          /* Set the encoding */
  	reg = sv_read_indirect(sc, SV_DMA_DATA_FORMAT);
  	reg &= ~(SV_DMAA_FORMAT16 | SV_DMAC_FORMAT16 | SV_DMAA_STEREO |
  		 SV_DMAC_STEREO);
  	reg |= (mode);
  	sv_write_indirect(sc, SV_DMA_DATA_FORMAT, reg);
  
  	val = p->sample_rate * 65536 / 48000;
  
  	sv_write_indirect(sc, SV_PCM_SAMPLE_RATE_0, (val & 0xff));
  	sv_write_indirect(sc, SV_PCM_SAMPLE_RATE_1, (val >> 8));
  
  #define F_REF 24576000
  
  #define ABS(x) (((x) < 0) ? (-x) : (x))
  
  	if (setmode & AUMODE_RECORD)
  	{
  	  /* The ADC reference frequency (f_out) is 512 * the sample rate */
  
  	  /* f_out is dervied from the 24.576MHZ crystal by three values:
  	     M & N & R. The equation is as follows:
  
  	     f_out = (m + 2) * f_ref / ((n + 2) * (2 ^ a))
  
  	     with the constraint that:
  
  	     80 MhZ < (m + 2) / (n + 2) * f_ref <= 150Mhz
  	     and n, m >= 1
  	  */
  
  	  int  goal_f_out = 512 * r->sample_rate;
  	  int  a, n, m, best_n, best_m, best_error = 10000000;
  	  int  pll_sample;
  
  	  for (a = 0; a < 8; a++) {
  	    if ((goal_f_out * (1 << a)) >= 80000000)
  	      break;
  	  }
  	  
  	  /* a != 8 because sample_rate >= 2000 */
  
  	  for (n = 33; n > 2; n--) {
  	    int error;
  
  	    m = (goal_f_out * n * (1 << a)) / F_REF;
  
  	    if ((m > 257) || (m < 3)) continue;
   
  	    pll_sample = (m * F_REF) / (n * (1 << a));
  	    pll_sample /= 512;
  
  	    /* Threshold might be good here */
  	    error = pll_sample - r->sample_rate;
  	    error = ABS(error);
  	    
  	    if (error < best_error) {
  	      best_error = error;
  	      best_n = n;
  	      best_m = m;
  	      if (error == 0) break;
  	    }
  	  }
  	
  
  	  best_n -= 2;
  	  best_m -= 2;
  	  
  	  sv_write_indirect(sc, SV_ADC_PLL_M, best_m);
  	  sv_write_indirect(sc, SV_ADC_PLL_N, best_n | (a << SV_PLL_R_SHIFT));
  	}
          return (0);
  }
  
  int
  sv_round_blocksize(addr, blk)
  	void *addr;
  	int blk;
  {
  	return (blk & -32);	/* keep good alignment */
  }
  
  int
  sv_dma_init_input(addr, buf, cc)
  	void *addr;
  	void *buf;
  	int cc;
  {
  	struct sv_softc *sc = addr;
  	struct sv_dma *p;
  	int dma_count;
  
  	DPRINTF(("sv_dma_init_input: dma start loop input addr=%p cc=%d\n", 
  		 buf, cc));
          for (p = sc->sc_dmas; p && KERNADDR(p) != buf; p = p->next)
  		;
  	if (!p) {
  		printf("sv_dma_init_input: bad addr %p\n", buf);
  		return (EINVAL);
  	}
  
  	dma_count = (cc >> 1) - 1;
  
  	bus_space_write_4(sc->sc_iot, sc->sc_dmac_ioh, SV_DMA_ADDR0,
  			  DMAADDR(p));
  	bus_space_write_4(sc->sc_iot, sc->sc_dmac_ioh, SV_DMA_COUNT0,
  			  dma_count);
  	bus_space_write_1(sc->sc_iot, sc->sc_dmac_ioh, SV_DMA_MODE,
  			  DMA37MD_WRITE | DMA37MD_LOOP);
  
  	return (0);
  }
  
  int
  sv_dma_init_output(addr, buf, cc)
  	void *addr;
  	void *buf;
  	int cc;
  {
  	struct sv_softc *sc = addr;
  	struct sv_dma *p;
  	int dma_count;
  
  	DPRINTF(("eap: dma start loop output buf=%p cc=%d\n", buf, cc));
          for (p = sc->sc_dmas; p && KERNADDR(p) != buf; p = p->next)
  		;
  	if (!p) {
  		printf("sv_dma_init_output: bad addr %p\n", buf);
  		return (EINVAL);
  	}
  
  	dma_count = cc - 1;
  
  	bus_space_write_4(sc->sc_iot, sc->sc_dmaa_ioh, SV_DMA_ADDR0,
  			  DMAADDR(p));
  	bus_space_write_4(sc->sc_iot, sc->sc_dmaa_ioh, SV_DMA_COUNT0,
  			  dma_count);
  	bus_space_write_1(sc->sc_iot, sc->sc_dmaa_ioh, SV_DMA_MODE,
  			  DMA37MD_READ | DMA37MD_LOOP);
  
  	return (0);
  }
  
  int
  sv_dma_output(addr, p, cc, intr, arg)
  	void *addr;
  	void *p;
  	int cc;
  	void (*intr) __P((void *));
  	void *arg;
  {
  	struct sv_softc *sc = addr;
  	u_int8_t mode;
  
  	DPRINTFN(1, 
                   ("sv_dma_output: sc=%p buf=%p cc=%d intr=%p(%p)\n", 
                    addr, p, cc, intr, arg));
  
  	sc->sc_pintr = intr;
  	sc->sc_parg = arg;
  	if (!(sc->sc_enable & SV_PLAY_ENABLE)) {
  	        int dma_count = cc - 1;
  
  		sv_write_indirect(sc, SV_DMAA_COUNT1, dma_count >> 8);
  		sv_write_indirect(sc, SV_DMAA_COUNT0, (dma_count & 0xFF));
  
  		mode = sv_read_indirect(sc, SV_PLAY_RECORD_ENABLE);
  		mode |= SV_PLAY_ENABLE;
  		sv_write_indirect(sc, SV_PLAY_RECORD_ENABLE, mode);
  		sc->sc_enable |= SV_PLAY_ENABLE;
  	}
          return (0);
  }
  
  int
  sv_dma_input(addr, p, cc, intr, arg)
  	void *addr;
  	void *p;
  	int cc;
  	void (*intr) __P((void *));
  	void *arg;
  {
  	struct sv_softc *sc = addr;
  	u_int8_t mode;
  
  	DPRINTFN(1, ("sv_dma_input: sc=%p buf=%p cc=%d intr=%p(%p)\n", 
  		     addr, p, cc, intr, arg));
  	sc->sc_rintr = intr;
  	sc->sc_rarg = arg;
  	if (!(sc->sc_enable & SV_RECORD_ENABLE)) {
  	        int dma_count = (cc >> 1) - 1;
  
  		sv_write_indirect(sc, SV_DMAC_COUNT1, dma_count >> 8);
  		sv_write_indirect(sc, SV_DMAC_COUNT0, (dma_count & 0xFF));
  
  		mode = sv_read_indirect(sc, SV_PLAY_RECORD_ENABLE);
  		mode |= SV_RECORD_ENABLE;
  		sv_write_indirect(sc, SV_PLAY_RECORD_ENABLE, mode);
  		sc->sc_enable |= SV_RECORD_ENABLE;
  	}
          return (0);
  }
  
  int
  sv_halt_out_dma(addr)
  	void *addr;
  {
  	struct sv_softc *sc = addr;
  	u_int8_t mode;
  	
          DPRINTF(("eap: sv_halt_out_dma\n"));
  	mode = sv_read_indirect(sc, SV_PLAY_RECORD_ENABLE);
  	mode &= ~SV_PLAY_ENABLE;
  	sc->sc_enable &= ~SV_PLAY_ENABLE;
  	sv_write_indirect(sc, SV_PLAY_RECORD_ENABLE, mode);
  
          return (0);
  }
  
  int
  sv_halt_in_dma(addr)
  	void *addr;
  {
  	struct sv_softc *sc = addr;
  	u_int8_t mode;
      
          DPRINTF(("eap: sv_halt_in_dma\n"));
  	mode = sv_read_indirect(sc, SV_PLAY_RECORD_ENABLE);
  	mode &= ~SV_RECORD_ENABLE;
  	sc->sc_enable &= ~SV_RECORD_ENABLE;
  	sv_write_indirect(sc, SV_PLAY_RECORD_ENABLE, mode);
  
          return (0);
  }
  
  int
  sv_getdev(addr, retp)
  	void *addr;
          struct audio_device *retp;
  {
  	*retp = sv_device;
          return (0);
  }
  
  
  /*
   * Mixer related code is here
   *
   */
  
  #define SV_INPUT_CLASS 0
  #define SV_OUTPUT_CLASS 1
  #define SV_RECORD_CLASS 2
  
  #define SV_LAST_CLASS 2
  
  static const char *mixer_classes[] = { AudioCinputs, AudioCoutputs, AudioCrecord };
  
  static const struct {
    u_int8_t   l_port;
    u_int8_t   r_port;
    u_int8_t   mask;
    u_int8_t   class;
    const char *audio;
  } ports[] = {
    { SV_LEFT_AUX1_INPUT_CONTROL, SV_RIGHT_AUX1_INPUT_CONTROL, SV_AUX1_MASK,
      SV_INPUT_CLASS, "aux1" },
    { SV_LEFT_CD_INPUT_CONTROL, SV_RIGHT_CD_INPUT_CONTROL, SV_CD_MASK, 
      SV_INPUT_CLASS, AudioNcd },
    { SV_LEFT_LINE_IN_INPUT_CONTROL, SV_RIGHT_LINE_IN_INPUT_CONTROL, SV_LINE_IN_MASK,
      SV_INPUT_CLASS, AudioNline },
    { SV_MIC_INPUT_CONTROL, 0, SV_MIC_MASK, SV_INPUT_CLASS, AudioNmicrophone },
    { SV_LEFT_SYNTH_INPUT_CONTROL, SV_RIGHT_SYNTH_INPUT_CONTROL, 
      SV_SYNTH_MASK, SV_INPUT_CLASS, AudioNfmsynth },
    { SV_LEFT_AUX2_INPUT_CONTROL, SV_RIGHT_AUX2_INPUT_CONTROL, SV_AUX2_MASK,
      SV_INPUT_CLASS, "aux2" },
    { SV_LEFT_PCM_INPUT_CONTROL, SV_RIGHT_PCM_INPUT_CONTROL, SV_PCM_MASK,
      SV_INPUT_CLASS, AudioNdac },
    { SV_LEFT_MIXER_OUTPUT_CONTROL, SV_RIGHT_MIXER_OUTPUT_CONTROL, 
      SV_MIXER_OUT_MASK, SV_OUTPUT_CLASS, AudioNmaster }
  };
  
  
  static const struct {
    int idx;
    const char *name;
  } record_sources[] = {
    { SV_REC_CD, AudioNcd },
    { SV_REC_DAC, AudioNdac },
    { SV_REC_AUX2, "aux2" },
    { SV_REC_LINE, AudioNline },
    { SV_REC_AUX1, "aux1" },
    { SV_REC_MIC, AudioNmicrophone },
    { SV_REC_MIXER, AudioNmixerout }
  };
  
  
  #define SV_DEVICES_PER_PORT 2
  #define SV_FIRST_MIXER (SV_LAST_CLASS + 1)
  #define SV_LAST_MIXER (SV_DEVICES_PER_PORT * (ARRAY_SIZE(ports)) + SV_LAST_CLASS)
  #define SV_RECORD_SOURCE (SV_LAST_MIXER + 1)
  #define SV_MIC_BOOST (SV_LAST_MIXER + 2)
  #define SV_RECORD_GAIN (SV_LAST_MIXER + 3)
  #define SV_SRS_MODE (SV_LAST_MIXER + 4)
  
  int 
  sv_query_devinfo(addr, dip)
  	void *addr;
  	mixer_devinfo_t *dip;
  {
  
    /* It's a class */
    if (dip->index <= SV_LAST_CLASS) {
      dip->type = AUDIO_MIXER_CLASS;
      dip->mixer_class = dip->index;
      dip->next = dip->prev = AUDIO_MIXER_LAST;
      strcpy(dip->label.name, 
  	   mixer_classes[dip->index]);
      return (0);
    }
  
    if (dip->index >= SV_FIRST_MIXER &&
        dip->index <= SV_LAST_MIXER) {
      int off = dip->index - SV_FIRST_MIXER;
      int mute = (off % SV_DEVICES_PER_PORT);
      int idx = off / SV_DEVICES_PER_PORT;
  
      dip->mixer_class = ports[idx].class;
      strcpy(dip->label.name, ports[idx].audio);
  
      if (!mute) {
        dip->type = AUDIO_MIXER_VALUE;
        dip->prev = AUDIO_MIXER_LAST;
        dip->next = dip->index + 1;
  
        if (ports[idx].r_port != 0)
  	dip->un.v.num_channels = 2;
        else
  	dip->un.v.num_channels = 1;
        
        strcpy(dip->un.v.units.name, AudioNvolume);
  		
      } else {
        dip->type = AUDIO_MIXER_ENUM;
        dip->prev = dip->index - 1;
        dip->next = AUDIO_MIXER_LAST;
  
        strcpy(dip->label.name, AudioNmute);
        dip->un.e.num_mem = 2;
        strcpy(dip->un.e.member[0].label.name, AudioNoff);
        dip->un.e.member[0].ord = 0;
        strcpy(dip->un.e.member[1].label.name, AudioNon);
        dip->un.e.member[1].ord = 1;
  
      }
  
      return (0);
    }
  
    switch (dip->index) {
    case SV_RECORD_SOURCE:
      dip->mixer_class = SV_RECORD_CLASS;
      dip->prev = AUDIO_MIXER_LAST;
      dip->next = SV_RECORD_GAIN;
      strcpy(dip->label.name, AudioNsource);
      dip->type = AUDIO_MIXER_ENUM;
  
      dip->un.e.num_mem = ARRAY_SIZE(record_sources);
  
      {
        int idx;
        for (idx = 0; idx < ARRAY_SIZE(record_sources); idx++) {
  	strcpy(dip->un.e.member[idx].label.name, record_sources[idx].name);
  	dip->un.e.member[idx].ord = record_sources[idx].idx;
        }
      }
      return (0);
  
    case SV_RECORD_GAIN:
      dip->mixer_class = SV_RECORD_CLASS;
      dip->prev = SV_RECORD_SOURCE;
      dip->next = AUDIO_MIXER_LAST;
      strcpy(dip->label.name, "gain");
      dip->type = AUDIO_MIXER_VALUE;
      dip->un.v.num_channels = 1;
      strcpy(dip->un.v.units.name, AudioNvolume);
      return (0);
  
    case SV_MIC_BOOST:
      dip->mixer_class = SV_RECORD_CLASS;
      dip->prev = AUDIO_MIXER_LAST;
      dip->next = AUDIO_MIXER_LAST;
      strcpy(dip->label.name, "micboost");
      goto on_off;
  
    case SV_SRS_MODE:
      dip->mixer_class = SV_OUTPUT_CLASS;
      dip->prev = dip->next = AUDIO_MIXER_LAST;
      strcpy(dip->label.name, AudioNspatial);
  
  on_off:
      dip->type = AUDIO_MIXER_ENUM;
      dip->un.e.num_mem = 2;
      strcpy(dip->un.e.member[0].label.name, AudioNoff);
      dip->un.e.member[0].ord = 0;
      strcpy(dip->un.e.member[1].label.name, AudioNon);
      dip->un.e.member[1].ord = 1;
      return (0);
    }
  
    return (ENXIO);
  }
  
  int
  sv_mixer_set_port(addr, cp)
  	void *addr;
  	mixer_ctrl_t *cp;
  {
    struct sv_softc *sc = addr;
    u_int8_t reg;
    int idx;
  
    if (cp->dev >= SV_FIRST_MIXER &&
        cp->dev <= SV_LAST_MIXER) {
      int off = cp->dev - SV_FIRST_MIXER;
      int mute = (off % SV_DEVICES_PER_PORT);
      idx = off / SV_DEVICES_PER_PORT;
  
      if (mute) {
        if (cp->type != AUDIO_MIXER_ENUM) 
  	return (EINVAL);
  
        reg = sv_read_indirect(sc, ports[idx].l_port);
        if (cp->un.ord) 
  	reg |= SV_MUTE_BIT;
        else
  	reg &= ~SV_MUTE_BIT;
        sv_write_indirect(sc, ports[idx].l_port, reg);
  
        if (ports[idx].r_port) {
  	reg = sv_read_indirect(sc, ports[idx].r_port);
  	if (cp->un.ord) 
  	  reg |= SV_MUTE_BIT;
  	else
  	  reg &= ~SV_MUTE_BIT;
  	sv_write_indirect(sc, ports[idx].r_port, reg);
        }
      } else {
        int  lval, rval;
  
        if (cp->type != AUDIO_MIXER_VALUE)
  	return (EINVAL);
  
        if (cp->un.value.num_channels != 1 &&
  	  cp->un.value.num_channels != 2)
  	return (EINVAL);
  
        if (ports[idx].r_port == 0) {
  	if (cp->un.value.num_channels != 1)
  	  return (EINVAL);
  	lval = cp->un.value.level[AUDIO_MIXER_LEVEL_MONO];
        } else {
  	if (cp->un.value.num_channels != 2)
  	  return (EINVAL);
  
  	lval = cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT];
  	rval = cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT];
        }
  
        sc->sc_trd = 1;
  
        reg = sv_read_indirect(sc, ports[idx].l_port);
        reg &= ~(ports[idx].mask);
        lval = ((AUDIO_MAX_GAIN - lval) * ports[idx].mask) / AUDIO_MAX_GAIN;
        reg |= lval;
        sv_write_indirect(sc, ports[idx].l_port, reg);
  
        if (ports[idx].r_port != 0) {
  	reg = sv_read_indirect(sc, ports[idx].r_port);
  	reg &= ~(ports[idx].mask);
  
  	rval = ((AUDIO_MAX_GAIN - rval) * ports[idx].mask) / AUDIO_MAX_GAIN;
  	reg |= rval;
  
  	sv_write_indirect(sc, ports[idx].r_port, reg);
        }
  
        sc->sc_trd = 0;
        sv_read_indirect(sc, ports[idx].l_port);
      }
  
      return (0);
    }
  
  
    switch (cp->dev) {
    case SV_RECORD_SOURCE:
      if (cp->type != AUDIO_MIXER_ENUM)
        return (EINVAL);
  
      for (idx = 0; idx < ARRAY_SIZE(record_sources); idx++) {
        if (record_sources[idx].idx == cp->un.ord)
  	goto found;
      }
      
      return (EINVAL);
  
    found:
      reg = sv_read_indirect(sc, SV_LEFT_ADC_INPUT_CONTROL);
      reg &= ~SV_REC_SOURCE_MASK;
      reg |= (((cp->un.ord) << SV_REC_SOURCE_SHIFT) & SV_REC_SOURCE_MASK);
      sv_write_indirect(sc, SV_LEFT_ADC_INPUT_CONTROL, reg);
  
      reg = sv_read_indirect(sc, SV_RIGHT_ADC_INPUT_CONTROL);
      reg &= ~SV_REC_SOURCE_MASK;
      reg |= (((cp->un.ord) << SV_REC_SOURCE_SHIFT) & SV_REC_SOURCE_MASK);
      sv_write_indirect(sc, SV_RIGHT_ADC_INPUT_CONTROL, reg);
      return (0);
  
    case SV_RECORD_GAIN:
      {
        int val;
  
        if (cp->type != AUDIO_MIXER_VALUE)
  	return (EINVAL);
  
        if (cp->un.value.num_channels != 1)
  	return (EINVAL);
  
        val = (cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] * SV_REC_GAIN_MASK) 
  	/ AUDIO_MAX_GAIN;
  
        reg = sv_read_indirect(sc, SV_LEFT_ADC_INPUT_CONTROL);
        reg &= ~SV_REC_GAIN_MASK;
        reg |= val;
        sv_write_indirect(sc, SV_LEFT_ADC_INPUT_CONTROL, reg);
        
        reg = sv_read_indirect(sc, SV_RIGHT_ADC_INPUT_CONTROL);
        reg &= ~SV_REC_GAIN_MASK;
        reg |= val;
        sv_write_indirect(sc, SV_RIGHT_ADC_INPUT_CONTROL, reg);
  
      }
  
      return (0);
  
    case SV_MIC_BOOST:
      if (cp->type != AUDIO_MIXER_ENUM)
        return (EINVAL);
  
      reg = sv_read_indirect(sc, SV_LEFT_ADC_INPUT_CONTROL);
      if (cp->un.ord) {
        reg |= SV_MIC_BOOST_BIT;
      } else {
        reg &= ~SV_MIC_BOOST_BIT;
      }
      
      sv_write_indirect(sc, SV_LEFT_ADC_INPUT_CONTROL, reg);
      return (0);
  
    case SV_SRS_MODE:
      if (cp->type != AUDIO_MIXER_ENUM)
        return (EINVAL);
  
      reg = sv_read_indirect(sc, SV_SRS_SPACE_CONTROL);
      if (cp->un.ord) {
        reg &= ~SV_SRS_SPACE_ONOFF;
      } else {
        reg |= SV_SRS_SPACE_ONOFF;
      }
      
      sv_write_indirect(sc, SV_SRS_SPACE_CONTROL, reg);
      return (0);
    }
  
    return (EINVAL);
  }
  
  int
  sv_mixer_get_port(addr, cp)
  	void *addr;
  	mixer_ctrl_t *cp;
  {
    struct sv_softc *sc = addr;
    int val;
    u_int8_t reg;
  
    if (cp->dev >= SV_FIRST_MIXER &&
        cp->dev <= SV_LAST_MIXER) {
      int off = cp->dev - SV_FIRST_MIXER;
      int mute = (off % 2);
      int idx = off / 2;
  
      if (mute) {
        if (cp->type != AUDIO_MIXER_ENUM) 
  	return (EINVAL);
  
        reg = sv_read_indirect(sc, ports[idx].l_port);
        cp->un.ord = ((reg & SV_MUTE_BIT) ? 1 : 0);
      } else {
        if (cp->type != AUDIO_MIXER_VALUE)
  	return (EINVAL);
  
        if (cp->un.value.num_channels != 1 &&
  	  cp->un.value.num_channels != 2)
  	return (EINVAL);
  
        if ((ports[idx].r_port == 0 &&
  	   cp->un.value.num_channels != 1) ||
  	  (ports[idx].r_port != 0 &&
  	   cp->un.value.num_channels != 2))
  	return (EINVAL);
  
        reg = sv_read_indirect(sc, ports[idx].l_port);
        reg &= ports[idx].mask;
  
        val = AUDIO_MAX_GAIN - ((reg * AUDIO_MAX_GAIN) / ports[idx].mask);
  
        if (ports[idx].r_port != 0) {
  	cp->un.value.level[AUDIO_MIXER_LEVEL_LEFT] = val;
  
  	reg = sv_read_indirect(sc, ports[idx].r_port);
  	reg &= ports[idx].mask;
        
  	val = AUDIO_MAX_GAIN - ((reg * AUDIO_MAX_GAIN) / ports[idx].mask);
  	cp->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] = val;
        } else 
  	cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] = val;
      }
  
      return (0);
    }
  
    switch (cp->dev) {
    case SV_RECORD_SOURCE:
      if (cp->type != AUDIO_MIXER_ENUM)
        return (EINVAL);
  
      reg = sv_read_indirect(sc, SV_LEFT_ADC_INPUT_CONTROL);
      cp->un.ord = ((reg & SV_REC_SOURCE_MASK) >> SV_REC_SOURCE_SHIFT);
  
      return (0);
  
    case SV_RECORD_GAIN:
      if (cp->type != AUDIO_MIXER_VALUE)
        return (EINVAL);
  
      if (cp->un.value.num_channels != 1)
        return (EINVAL);
  
      reg = sv_read_indirect(sc, SV_LEFT_ADC_INPUT_CONTROL) & SV_REC_GAIN_MASK;
      cp->un.value.level[AUDIO_MIXER_LEVEL_MONO] = 
        (((unsigned int)reg) * AUDIO_MAX_GAIN) / SV_REC_GAIN_MASK;
  
      return (0);
  
    case SV_MIC_BOOST:
      if (cp->type != AUDIO_MIXER_ENUM)
        return (EINVAL);
  
      reg = sv_read_indirect(sc, SV_LEFT_ADC_INPUT_CONTROL);
      cp->un.ord = ((reg & SV_MIC_BOOST_BIT) ? 1 : 0);
  
      return (0);
  
  
    case SV_SRS_MODE:
      if (cp->type != AUDIO_MIXER_ENUM)
        return (EINVAL);
  
      reg = sv_read_indirect(sc, SV_SRS_SPACE_CONTROL);
  
      cp->un.ord = ((reg & SV_SRS_SPACE_ONOFF) ? 0 : 1);
      return (0);
    }
  
    return (EINVAL);
  }
  
  
  static void
  sv_init_mixer(sc)
       struct sv_softc *sc;
  {
    mixer_ctrl_t cp;
    int idx;
  
    cp.type = AUDIO_MIXER_ENUM;
    cp.dev = SV_SRS_MODE;
    cp.un.ord = 0;
  
    sv_mixer_set_port(sc, &cp);
  
    for (idx = 0; idx < ARRAY_SIZE(ports); idx++) {
      if (ports[idx].audio == AudioNdac) {
        cp.type = AUDIO_MIXER_ENUM;
        cp.dev = SV_FIRST_MIXER + idx * SV_DEVICES_PER_PORT + 1;
        cp.un.ord = 0;
        sv_mixer_set_port(sc, &cp);
        break;
      }
    }
  }
  
  void *
  sv_malloc(addr, size, pool, flags)
  	void *addr;
  	u_long size;
  	int pool;
  	int flags;
  {
  	struct sv_softc *sc = addr;
          struct sv_dma *p;
          int error;
  
          p = malloc(sizeof(*p), pool, flags);
          if (!p)
                  return (0);
          error = sv_allocmem(sc, size, 16, p);
          if (error) {
                  free(p, pool);
          	return (0);
          }
          p->next = sc->sc_dmas;
          sc->sc_dmas = p;
  	return (KERNADDR(p));
  }
  
  void
  sv_free(addr, ptr, pool)
  	void *addr;
  	void *ptr;
  	int pool;
  {
  	struct sv_softc *sc = addr;
          struct sv_dma **p;
  
          for (p = &sc->sc_dmas; *p; p = &(*p)->next) {
                  if (KERNADDR(*p) == ptr) {
                          sv_freemem(sc, *p);
                          *p = (*p)->next;
                          free(*p, pool);
                          return;
                  }
          }
  }
  
  u_long
  sv_round(addr, size)
  	void *addr;
  	u_long size;
  {
  	return (size);
  }
  
  int
  sv_mappage(addr, mem, off, prot)
  	void *addr;
          void *mem;
          int off;
  	int prot;
  {
  	struct sv_softc *sc = addr;
          struct sv_dma *p;
  
          for (p = sc->sc_dmas; p && KERNADDR(p) != mem; p = p->next)
  		;
  	if (!p)
  		return (-1);
  	return (bus_dmamem_mmap(sc->sc_dmatag, p->segs, p->nsegs, 
  				off, prot, BUS_DMA_WAITOK));
  }
  
  int
  sv_get_props(addr)
  	void *addr;
  {
  	return (AUDIO_PROP_MMAP | AUDIO_PROP_FULLDUPLEX);
  }
  