/*      $OpenBSD: auvia.c,v 1.67 2024/04/13 23:44:11 jsg Exp $ */
/*      $NetBSD: auvia.c,v 1.28 2002/11/04 16:38:49 kent Exp $  */

/*-
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Tyler C. Sarna
 *
 * 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 NETBSD FOUNDATION, INC. 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.
 */

/*
 * VIA Technologies VT82C686A Southbridge Audio Driver
 *
 * Documentation links:
 *
 * ftp://ftp.alsa-project.org/pub/manuals/via/686a.pdf
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/audioio.h>

#include <dev/pci/pcidevs.h>
#include <dev/pci/pcivar.h>

#include <dev/audio_if.h>

#include <dev/ic/ac97.h>

#include <dev/pci/auviavar.h>

struct auvia_dma {
        struct auvia_dma *next;
        caddr_t addr;
        size_t size;
        bus_dmamap_t map;
        bus_dma_segment_t seg;
};

struct auvia_dma_op {
        u_int32_t ptr;
        u_int32_t flags;
#define AUVIA_DMAOP_EOL         0x80000000
#define AUVIA_DMAOP_FLAG        0x40000000
#define AUVIA_DMAOP_STOP        0x20000000
#define AUVIA_DMAOP_COUNT(x)    ((x)&0x00FFFFFF)
};

int     auvia_match(struct device *, void *, void *);
void    auvia_attach(struct device *, struct device *, void *);
int     auvia_open(void *, int);
void    auvia_close(void *);
void    auvia_set_params_sub(struct auvia_softc *, struct auvia_softc_chan *,
        struct audio_params *);
int     auvia_set_params(void *, int, int, struct audio_params *,
        struct audio_params *);
int     auvia_round_blocksize(void *, int);
int     auvia_halt_output(void *);
int     auvia_halt_input(void *);
int     auvia_set_port(void *, mixer_ctrl_t *);
int     auvia_get_port(void *, mixer_ctrl_t *);
int     auvia_query_devinfo(void *, mixer_devinfo_t *);
void *  auvia_malloc(void *, int, size_t, int, int);
void    auvia_free(void *, void *, int);
size_t  auvia_round_buffersize(void *, int, size_t);
int     auvia_build_dma_ops(struct auvia_softc *, struct auvia_softc_chan *,
        struct auvia_dma *, void *, void *, int);
int     auvia_trigger_output(void *, void *, void *, int, void (*)(void *),
        void *, struct audio_params *);
int     auvia_trigger_input(void *, void *, void *, int, void (*)(void *),
        void *, struct audio_params *);

int     auvia_intr(void *);

int     auvia_activate(struct device *, int);

struct  cfdriver auvia_cd = {
        NULL, "auvia", DV_DULL
};

const struct cfattach auvia_ca = {
        sizeof (struct auvia_softc), auvia_match, auvia_attach,
            NULL, auvia_activate
};

#define AUVIA_PCICONF_JUNK      0x40
#define         AUVIA_PCICONF_ENABLES    0x00FF0000     /* reg 42 mask */
#define         AUVIA_PCICONF_ACLINKENAB 0x00008000     /* ac link enab */
#define         AUVIA_PCICONF_ACNOTRST   0x00004000     /* ~(ac reset) */
#define         AUVIA_PCICONF_ACSYNC     0x00002000     /* ac sync */
#define         AUVIA_PCICONF_ACVSR      0x00000800     /* var. samp. rate */
#define         AUVIA_PCICONF_ACSGD      0x00000400     /* SGD enab */
#define         AUVIA_PCICONF_ACFM       0x00000200     /* FM enab */
#define         AUVIA_PCICONF_ACSB       0x00000100     /* SB enab */
#define         AUVIA_PCICONF_PRIVALID   0x00000001     /* primary codec rdy */

#define AUVIA_PLAY_BASE                 0x00
#define AUVIA_RECORD_BASE               0x10

/* *_RP_* are offsets from AUVIA_PLAY_BASE or AUVIA_RECORD_BASE */
#define AUVIA_RP_STAT                   0x00
#define         AUVIA_RPSTAT_INTR               0x03
#define AUVIA_RP_CONTROL                0x01
#define         AUVIA_RPCTRL_START              0x80
#define         AUVIA_RPCTRL_TERMINATE          0x40
#define         AUVIA_RPCTRL_AUTOSTART          0x20
/* The following are 8233 specific */
#define         AUVIA_RPCTRL_STOP               0x04
#define         AUVIA_RPCTRL_EOL                0x02
#define         AUVIA_RPCTRL_FLAG               0x01
#define AUVIA_RP_MODE                   0x02            /* 82c686 specific */
#define         AUVIA_RPMODE_INTR_FLAG          0x01
#define         AUVIA_RPMODE_INTR_EOL           0x02
#define         AUVIA_RPMODE_STEREO             0x10
#define         AUVIA_RPMODE_16BIT              0x20
#define         AUVIA_RPMODE_AUTOSTART          0x80
#define AUVIA_RP_DMAOPS_BASE            0x04

#define VIA8233_RP_DXS_LVOL             0x02
#define VIA8233_RP_DXS_RVOL             0x03
#define VIA8233_RP_RATEFMT              0x08
#define         VIA8233_RATEFMT_48K     0xfffff
#define         VIA8233_RATEFMT_STEREO  0x00100000
#define         VIA8233_RATEFMT_16BIT   0x00200000

#define VIA_RP_DMAOPS_COUNT             0x0c

#define VIA8233_MP_BASE                 0x40
        /* STAT, CONTROL, DMAOPS_BASE, DMAOPS_COUNT are valid */
#define VIA8233_OFF_MP_FORMAT           0x02
#define         VIA8233_MP_FORMAT_8BIT          0x00
#define         VIA8233_MP_FORMAT_16BIT         0x80
#define         VIA8233_MP_FORMAT_CHANNLE_MASK  0x70 /* 1, 2, 4, 6 */
#define VIA8233_OFF_MP_SCRATCH          0x03
#define VIA8233_OFF_MP_STOP             0x08

#define VIA8233_WR_BASE                 0x60

#define AUVIA_CODEC_CTL                 0x80
#define         AUVIA_CODEC_READ                0x00800000
#define         AUVIA_CODEC_BUSY                0x01000000
#define         AUVIA_CODEC_PRIVALID            0x02000000
#define         AUVIA_CODEC_INDEX(x)            ((x)<<16)

#define CH_WRITE1(sc, ch, off, v)       \
        bus_space_write_1((sc)->sc_iot, (sc)->sc_ioh, (ch)->sc_base + (off), v)
#define CH_WRITE4(sc, ch, off, v)       \
        bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (ch)->sc_base + (off), v)
#define CH_READ1(sc, ch, off)           \
        bus_space_read_1((sc)->sc_iot, (sc)->sc_ioh, (ch)->sc_base + (off))
#define CH_READ4(sc, ch, off)           \
        bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (ch)->sc_base + (off))

#define TIMEOUT 50

const struct audio_hw_if auvia_hw_if = {
        .open = auvia_open,
        .close = auvia_close,
        .set_params = auvia_set_params,
        .round_blocksize = auvia_round_blocksize,
        .halt_output = auvia_halt_output,
        .halt_input = auvia_halt_input,
        .set_port = auvia_set_port,
        .get_port = auvia_get_port,
        .query_devinfo = auvia_query_devinfo,
        .allocm = auvia_malloc,
        .freem = auvia_free,
        .round_buffersize = auvia_round_buffersize,
        .trigger_output = auvia_trigger_output,
        .trigger_input = auvia_trigger_input,
};

int     auvia_attach_codec(void *, struct ac97_codec_if *);
int     auvia_write_codec(void *, u_int8_t, u_int16_t);
int     auvia_read_codec(void *, u_int8_t, u_int16_t *);
void    auvia_reset_codec(void *);
int     auvia_waitready_codec(struct auvia_softc *sc);
int     auvia_waitvalid_codec(struct auvia_softc *sc);
void    auvia_spdif_event(void *, int);

void    auvia_resume(struct auvia_softc *);

const struct pci_matchid auvia_devices[] = {
        { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C686A_AC97 },
        { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT8233_AC97 },
};

int
auvia_match(struct device *parent, void *match, void *aux)
{
        return (pci_matchbyid((struct pci_attach_args *)aux, auvia_devices,
            nitems(auvia_devices)));
}

int
auvia_activate(struct device *self, int act)
{
        struct auvia_softc *sc = (struct auvia_softc *)self;

        if (act == DVACT_RESUME)
                auvia_resume(sc);
        return (config_activate_children(self, act));
}

void
auvia_attach(struct device *parent, struct device *self, void *aux)
{
        struct pci_attach_args *pa = aux;
        struct auvia_softc *sc = (struct auvia_softc *) self;
        const char *intrstr = NULL;
        struct mixer_ctrl ctl;
        pci_chipset_tag_t pc = pa->pa_pc;
        pcitag_t pt = pa->pa_tag;
        pci_intr_handle_t ih;
        bus_size_t iosize;
        pcireg_t pr;
        int r, i;

        sc->sc_play.sc_base = AUVIA_PLAY_BASE;
        sc->sc_record.sc_base = AUVIA_RECORD_BASE;
        if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_VIATECH_VT8233_AC97) {
                sc->sc_flags |= AUVIA_FLAGS_VT8233;
                sc->sc_play.sc_base = VIA8233_MP_BASE;
                sc->sc_record.sc_base = VIA8233_WR_BASE;
        }

        if (pci_mapreg_map(pa, 0x10, PCI_MAPREG_TYPE_IO, 0, &sc->sc_iot,
            &sc->sc_ioh, NULL, &iosize, 0)) {
                printf(": can't map i/o space\n");
                return;
        }

        sc->sc_dmat = pa->pa_dmat;
        sc->sc_pc = pc;
        sc->sc_pt = pt;

        if (pci_intr_map(pa, &ih)) {
                printf(": couldn't map interrupt\n");
                bus_space_unmap(sc->sc_iot, sc->sc_ioh, iosize);
                return;
        }
        intrstr = pci_intr_string(pc, ih);

        sc->sc_ih = pci_intr_establish(pc, ih, IPL_AUDIO | IPL_MPSAFE,
            auvia_intr, sc, sc->sc_dev.dv_xname);
        if (sc->sc_ih == NULL) {
                printf(": couldn't establish interrupt");
                if (intrstr != NULL)
                        printf(" at %s", intrstr);
                printf("\n");
                bus_space_unmap(sc->sc_iot, sc->sc_ioh, iosize);
                return;
        }

        printf(": %s\n", intrstr);

        /* disable SBPro compat & others */
        pr = pci_conf_read(pc, pt, AUVIA_PCICONF_JUNK);

        pr &= ~AUVIA_PCICONF_ENABLES; /* clear compat function enables */
        /* XXX what to do about MIDI, FM, joystick? */

        pr |= (AUVIA_PCICONF_ACLINKENAB | AUVIA_PCICONF_ACNOTRST |
            AUVIA_PCICONF_ACVSR | AUVIA_PCICONF_ACSGD);

        pr &= ~(AUVIA_PCICONF_ACFM | AUVIA_PCICONF_ACSB);

        pci_conf_write(pc, pt, AUVIA_PCICONF_JUNK, pr);
        sc->sc_pci_junk = pr;

        sc->host_if.arg = sc;
        sc->host_if.attach = auvia_attach_codec;
        sc->host_if.read = auvia_read_codec;
        sc->host_if.write = auvia_write_codec;
        sc->host_if.reset = auvia_reset_codec;
        sc->host_if.spdif_event = auvia_spdif_event;

        if ((r = ac97_attach(&sc->host_if)) != 0) {
                printf("%s: can't attach codec (error 0x%X)\n",
                    sc->sc_dev.dv_xname, r);
                pci_intr_disestablish(pc, sc->sc_ih);
                bus_space_unmap(sc->sc_iot, sc->sc_ioh, iosize);
                return;
        }

        /* disable mutes */
        for (i = 0; i < 4; i++) {
                static struct {
                        char *class, *device;
                } d[] = {
                        { AudioCoutputs, AudioNmaster},
                        { AudioCinputs, AudioNdac},
                        { AudioCinputs, AudioNcd},
                        { AudioCrecord, AudioNvolume},
                };

                ctl.type = AUDIO_MIXER_ENUM;
                ctl.un.ord = 0;

                ctl.dev = sc->codec_if->vtbl->get_portnum_by_name(sc->codec_if,
                    d[i].class, d[i].device, AudioNmute);
                auvia_set_port(sc, &ctl);
        }

        /* set a reasonable default volume */

        ctl.type = AUDIO_MIXER_VALUE;
        ctl.un.value.num_channels = 2;
        ctl.un.value.level[AUDIO_MIXER_LEVEL_LEFT] = \
        ctl.un.value.level[AUDIO_MIXER_LEVEL_RIGHT] = 199;

        ctl.dev = sc->codec_if->vtbl->get_portnum_by_name(sc->codec_if,
            AudioCoutputs, AudioNmaster, NULL);
        auvia_set_port(sc, &ctl);

        audio_attach_mi(&auvia_hw_if, sc, NULL, &sc->sc_dev);
        sc->codec_if->vtbl->unlock(sc->codec_if);
}


int
auvia_attach_codec(void *addr, struct ac97_codec_if *cif)
{
        struct auvia_softc *sc = addr;

        sc->codec_if = cif;

        return 0;
}


void
auvia_reset_codec(void *addr)
{
        int i;
        struct auvia_softc *sc = addr;
        pcireg_t r;

        /* perform a codec cold reset */

        r = pci_conf_read(sc->sc_pc, sc->sc_pt, AUVIA_PCICONF_JUNK);

        r &= ~AUVIA_PCICONF_ACNOTRST;   /* enable RESET (active low) */
        pci_conf_write(sc->sc_pc, sc->sc_pt, AUVIA_PCICONF_JUNK, r);
        delay(2);

        r |= AUVIA_PCICONF_ACNOTRST;    /* disable RESET (inactive high) */
        pci_conf_write(sc->sc_pc, sc->sc_pt, AUVIA_PCICONF_JUNK, r);
        delay(200);

        for (i = 500000; i != 0 && !(pci_conf_read(sc->sc_pc, sc->sc_pt,
                AUVIA_PCICONF_JUNK) & AUVIA_PCICONF_PRIVALID); i--)
                DELAY(1);
        if (i == 0)
                printf("%s: codec reset timed out\n", sc->sc_dev.dv_xname);
}


int
auvia_waitready_codec(struct auvia_softc *sc)
{
        int i;

        /* poll until codec not busy */
        for (i = 0; (i < TIMEOUT) && (bus_space_read_4(sc->sc_iot, sc->sc_ioh,
             AUVIA_CODEC_CTL) & AUVIA_CODEC_BUSY); i++)
                delay(1);

        if (i >= TIMEOUT) {
                printf("%s: codec busy\n", sc->sc_dev.dv_xname);
                return 1;
        }

        return 0;
}


int
auvia_waitvalid_codec(struct auvia_softc *sc)
{
        int i;

        /* poll until codec valid */
        for (i = 0; (i < TIMEOUT) && !(bus_space_read_4(sc->sc_iot, sc->sc_ioh,
             AUVIA_CODEC_CTL) & AUVIA_CODEC_PRIVALID); i++)
                delay(1);

        if (i >= TIMEOUT) {
                printf("%s: codec invalid\n", sc->sc_dev.dv_xname);
                return 1;
        }

        return 0;
}


int
auvia_write_codec(void *addr, u_int8_t reg, u_int16_t val)
{
        struct auvia_softc *sc = addr;

        if (auvia_waitready_codec(sc))
                return 1;

        bus_space_write_4(sc->sc_iot, sc->sc_ioh, AUVIA_CODEC_CTL,
            AUVIA_CODEC_PRIVALID | AUVIA_CODEC_INDEX(reg) | val);

        return 0;
}


int
auvia_read_codec(void *addr, u_int8_t reg, u_int16_t *val)
{
        struct auvia_softc *sc = addr;

        if (auvia_waitready_codec(sc))
                return 1;

        bus_space_write_4(sc->sc_iot, sc->sc_ioh, AUVIA_CODEC_CTL,
            AUVIA_CODEC_PRIVALID | AUVIA_CODEC_READ | AUVIA_CODEC_INDEX(reg));

        if (auvia_waitready_codec(sc))
                return 1;

        if (auvia_waitvalid_codec(sc))
                return 1;

        *val = bus_space_read_2(sc->sc_iot, sc->sc_ioh, AUVIA_CODEC_CTL);

        return 0;
}


void
auvia_spdif_event(void *addr, int flag)
{
        struct auvia_softc *sc = addr;
        sc->sc_spdif = flag;
}

int
auvia_open(void *addr, int flags)
{
        struct auvia_softc *sc = addr;
        sc->codec_if->vtbl->lock(sc->codec_if);
        return 0;
}


void
auvia_close(void *addr)
{
        struct auvia_softc *sc = addr;
        sc->codec_if->vtbl->unlock(sc->codec_if);

        /* XXX: already called by audio_close() */
        auvia_halt_output(sc);
        auvia_halt_input(sc);

        sc->sc_play.sc_intr = NULL;
        sc->sc_record.sc_intr = NULL;
}


void
auvia_set_params_sub(struct auvia_softc *sc, struct auvia_softc_chan *ch,
                     struct audio_params *p)
{
        u_int32_t v;
        u_int16_t regval;

        if (!(sc->sc_flags & AUVIA_FLAGS_VT8233)) {
                regval = (p->channels == 2 ? AUVIA_RPMODE_STEREO : 0)
                        | (p->precision == 16 ?
                                AUVIA_RPMODE_16BIT : 0)
                        | AUVIA_RPMODE_INTR_FLAG | AUVIA_RPMODE_INTR_EOL
                        | AUVIA_RPMODE_AUTOSTART;
                ch->sc_reg = regval;
        } else if (ch->sc_base != VIA8233_MP_BASE) {
                v = CH_READ4(sc, ch, VIA8233_RP_RATEFMT);
                v &= ~(VIA8233_RATEFMT_48K | VIA8233_RATEFMT_STEREO
                        | VIA8233_RATEFMT_16BIT);

                v |= VIA8233_RATEFMT_48K * (p->sample_rate / 20)
                        / (48000 / 20);
                if (p->channels == 2)
                        v |= VIA8233_RATEFMT_STEREO;
                if (p->precision == 16)
                        v |= VIA8233_RATEFMT_16BIT;

                CH_WRITE4(sc, ch, VIA8233_RP_RATEFMT, v);
        } else {
                static const u_int32_t slottab[7] =
                        { 0, 0xff000011, 0xff000021, 0,
                          0xff004321, 0, 0xff436521};

                regval = (p->precision == 16
                        ? VIA8233_MP_FORMAT_16BIT : VIA8233_MP_FORMAT_8BIT)
                        | (p->channels << 4);
                CH_WRITE1(sc, ch, VIA8233_OFF_MP_FORMAT, regval);
                CH_WRITE4(sc, ch, VIA8233_OFF_MP_STOP, slottab[p->channels]);
        }
}

int
auvia_set_params(void *addr, int setmode, int usemode,
    struct audio_params *play, struct audio_params *rec)
{
        struct auvia_softc *sc = addr;
        struct auvia_softc_chan *ch;
        struct audio_params *p;
        struct ac97_codec_if* codec = sc->codec_if;
        int reg, mode;
        u_int16_t ext_id;

        /* for mode in (RECORD, PLAY) */
        for (mode = AUMODE_RECORD; mode != -1;
             mode = mode == AUMODE_RECORD ? AUMODE_PLAY : -1) {
                if ((setmode & mode) == 0)
                        continue;

                if (mode == AUMODE_PLAY) {
                        p = play;
                        ch = &sc->sc_play;
                        reg = AC97_REG_PCM_FRONT_DAC_RATE;
                } else {
                        p = rec;
                        ch = &sc->sc_record;
                        reg = AC97_REG_PCM_LR_ADC_RATE;
                }

                if (ch->sc_base == VIA8233_MP_BASE && mode == AUMODE_PLAY) {
                        ext_id = codec->vtbl->get_caps(codec);
                        if (p->channels == 1) {
                                /* ok */
                        } else if (p->channels == 2) {
                                /* ok */
                        } else if (p->channels == 4
                                && ext_id & AC97_EXT_AUDIO_SDAC) {
                                /* ok */
                        } else if (p->channels == 6
                                && (ext_id & AC97_BITS_6CH) == AC97_BITS_6CH) {
                                /* ok */
                        } else {
                                p->channels = 2;
                        }
                } else {
                        if (p->channels > 2)
                                p->channels = 2;
                }

                if (p->sample_rate < 4000)
                        p->sample_rate = 4000;
                if (p->sample_rate > 48000)
                        p->sample_rate = 48000;
                if (p->precision > 16)
                        p->precision = 16;

                /* XXX only 16-bit 48kHz slinear_le if s/pdif enabled ? */
                if (sc->sc_spdif) {
                        p->sample_rate = 48000;
                        p->precision = 16;
                        p->encoding = AUDIO_ENCODING_SLINEAR_LE;
                }

                /* XXX only 16-bit 48kHz slinear_le if s/pdif enabled ? */
                if (sc->sc_spdif &&
                    ((p->sample_rate != 48000) || (p->precision != 16) ||
                    (p->encoding != AUDIO_ENCODING_SLINEAR_LE)))
                        return (EINVAL);

                if (AC97_IS_FIXED_RATE(codec)) {
                        p->sample_rate = AC97_SINGLE_RATE;
                } else {
                        if (codec->vtbl->set_rate(codec, reg, &p->sample_rate))
                                return (EINVAL);

                        if (ch->sc_base == VIA8233_MP_BASE &&
                            mode == AUMODE_PLAY) {
                                reg = AC97_REG_PCM_SURR_DAC_RATE;
                                if (p->channels >= 4
                                    && codec->vtbl->set_rate(codec, reg,
                                    &p->sample_rate))
                                        return (EINVAL);
                                reg = AC97_REG_PCM_LFE_DAC_RATE;
                                if (p->channels == 6
                                    && codec->vtbl->set_rate(codec, reg,
                                    &p->sample_rate))
                                        return (EINVAL);
                        }
                }

                switch (p->encoding) {
                case AUDIO_ENCODING_SLINEAR_LE:
                        if (p->precision != 16)
                                return EINVAL;
                        break;
                case AUDIO_ENCODING_ULINEAR_LE:
                case AUDIO_ENCODING_ULINEAR_BE:
                        if (p->precision != 8)
                                return EINVAL;
                        break;
                default:
                        return (EINVAL);
                }
                auvia_set_params_sub(sc, ch, p);

                p->bps = AUDIO_BPS(p->precision);
                p->msb = 1;
        }

        return 0;
}


int
auvia_round_blocksize(void *addr, int blk)
{
        struct auvia_softc *sc = addr;

        if (sc->bufsize / blk > AUVIA_DMALIST_MAX)
                blk = sc->bufsize / AUVIA_DMALIST_MAX + 1;
        return ((blk + 31) & -32);
}


int
auvia_halt_output(void *addr)
{
        struct auvia_softc *sc = addr;
        struct auvia_softc_chan *ch = &(sc->sc_play);

        CH_WRITE1(sc, ch, AUVIA_RP_CONTROL, AUVIA_RPCTRL_TERMINATE);
        ch->sc_intr = NULL;
        return 0;
}


int
auvia_halt_input(void *addr)
{
        struct auvia_softc *sc = addr;
        struct auvia_softc_chan *ch = &(sc->sc_record);

        CH_WRITE1(sc, ch, AUVIA_RP_CONTROL, AUVIA_RPCTRL_TERMINATE);
        ch->sc_intr = NULL;
        return 0;
}


int
auvia_set_port(void *addr, mixer_ctrl_t *cp)
{
        struct auvia_softc *sc = addr;

        return (sc->codec_if->vtbl->mixer_set_port(sc->codec_if, cp));
}


int
auvia_get_port(void *addr, mixer_ctrl_t *cp)
{
        struct auvia_softc *sc = addr;

        return (sc->codec_if->vtbl->mixer_get_port(sc->codec_if, cp));
}


int
auvia_query_devinfo(void *addr, mixer_devinfo_t *dip)
{
        struct auvia_softc *sc = addr;

        return (sc->codec_if->vtbl->query_devinfo(sc->codec_if, dip));
}


void *
auvia_malloc(void *addr, int direction, size_t size, int pool, int flags)
{
        struct auvia_softc *sc = addr;
        struct auvia_dma *p;
        int error;
        int rseg;

        p = malloc(sizeof(*p), pool, flags);
        if (!p)
                return 0;

        p->size = size;
        if ((error = bus_dmamem_alloc(sc->sc_dmat, size, PAGE_SIZE, 0, &p->seg,
            1, &rseg, BUS_DMA_NOWAIT)) != 0) {
                printf("%s: unable to allocate dma, error = %d\n",
                    sc->sc_dev.dv_xname, error);
                goto fail_alloc;
        }

        if ((error = bus_dmamem_map(sc->sc_dmat, &p->seg, rseg, size, &p->addr,
            BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
                printf("%s: unable to map dma, error = %d\n",
                    sc->sc_dev.dv_xname, error);
                goto fail_map;
        }

        if ((error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0,
            BUS_DMA_NOWAIT, &p->map)) != 0) {
                printf("%s: unable to create dma map, error = %d\n",
                    sc->sc_dev.dv_xname, error);
                goto fail_create;
        }

        if ((error = bus_dmamap_load(sc->sc_dmat, p->map, p->addr, size, NULL,
            BUS_DMA_NOWAIT)) != 0) {
                printf("%s: unable to load dma map, error = %d\n",
                    sc->sc_dev.dv_xname, error);
                goto fail_load;
        }

        p->next = sc->sc_dmas;
        sc->sc_dmas = p;

        return p->addr;


fail_load:
        bus_dmamap_destroy(sc->sc_dmat, p->map);
fail_create:
        bus_dmamem_unmap(sc->sc_dmat, p->addr, size);
fail_map:
        bus_dmamem_free(sc->sc_dmat, &p->seg, 1);
fail_alloc:
        free(p, pool, sizeof(*p));
        return 0;
}


void
auvia_free(void *addr, void *ptr, int pool)
{
        struct auvia_softc *sc = addr;
        struct auvia_dma **pp, *p;

        for (pp = &(sc->sc_dmas); (p = *pp) != NULL; pp = &p->next)
                if (p->addr == ptr) {
                        bus_dmamap_unload(sc->sc_dmat, p->map);
                        bus_dmamap_destroy(sc->sc_dmat, p->map);
                        bus_dmamem_unmap(sc->sc_dmat, p->addr, p->size);
                        bus_dmamem_free(sc->sc_dmat, &p->seg, 1);

                        *pp = p->next;
                        free(p, pool, sizeof(*p));
                        return;
                }

        panic("auvia_free: trying to free unallocated memory");
}

size_t
auvia_round_buffersize(void *addr, int direction, size_t bufsize)
{
        struct auvia_softc *sc = addr;

        sc->bufsize = bufsize;
        return bufsize;
}


int
auvia_build_dma_ops(struct auvia_softc *sc, struct auvia_softc_chan *ch,
    struct auvia_dma *p, void *start, void *end, int blksize)
{
        struct auvia_dma_op *op;
        struct auvia_dma *dp;
        bus_addr_t s;
        size_t l;
        int segs;

        s = p->map->dm_segs[0].ds_addr;
        l = (vaddr_t)end - (vaddr_t)start;
        segs = howmany(l, blksize);
        if (segs > AUVIA_DMALIST_MAX) {
                panic("%s: build_dma_ops: too many DMA segments",
                            sc->sc_dev.dv_xname);
        }

        if (segs > ch->sc_dma_op_count) {
                /* if old list was too small, free it */
                if (ch->sc_dma_ops)
                        auvia_free(sc, ch->sc_dma_ops, M_DEVBUF);

                ch->sc_dma_ops = auvia_malloc(sc, 0,
                    sizeof(struct auvia_dma_op) * segs, M_DEVBUF, M_WAITOK);

                for (dp = sc->sc_dmas; dp &&
                     dp->addr != (void *)(ch->sc_dma_ops); dp = dp->next)
                        ;

                if (!dp)
                        panic("%s: build_dma_ops: where'd my memory go??? "
                            "address (%p)", sc->sc_dev.dv_xname,
                            ch->sc_dma_ops);

                ch->sc_dma_op_count = segs;
                ch->sc_dma_ops_dma = dp;
        }

        op = ch->sc_dma_ops;

        while (l) {
                op->ptr = htole32(s);
                l = l - min(l, blksize);
                /* if last block */
                op->flags = htole32((l? AUVIA_DMAOP_FLAG : AUVIA_DMAOP_EOL) | blksize);
                s += blksize;
                op++;
        }

        return 0;
}


int
auvia_trigger_output(void *addr, void *start, void *end, int blksize,
    void (*intr)(void *), void *arg, struct audio_params *param)
{
        struct auvia_softc *sc = addr;
        struct auvia_softc_chan *ch = &(sc->sc_play);
        struct auvia_dma *p;

        for (p = sc->sc_dmas; p && p->addr != start; p = p->next)
                ;

        if (!p)
                panic("auvia_trigger_output: request with bad start "
                    "address (%p)", start);

        if (auvia_build_dma_ops(sc, ch, p, start, end, blksize)) {
                return 1;
        }

        ch->sc_intr = intr;
        ch->sc_arg = arg;

        CH_WRITE4(sc, ch, AUVIA_RP_DMAOPS_BASE,
            ch->sc_dma_ops_dma->map->dm_segs[0].ds_addr);
        mtx_enter(&audio_lock);
        if (sc->sc_flags & AUVIA_FLAGS_VT8233) {
                if (ch->sc_base != VIA8233_MP_BASE) {
                        CH_WRITE1(sc, ch, VIA8233_RP_DXS_LVOL, 0);
                        CH_WRITE1(sc, ch, VIA8233_RP_DXS_RVOL, 0);
                }
                CH_WRITE1(sc, ch, AUVIA_RP_CONTROL,
                    AUVIA_RPCTRL_START | AUVIA_RPCTRL_AUTOSTART |
                    AUVIA_RPCTRL_STOP  | AUVIA_RPCTRL_EOL | AUVIA_RPCTRL_FLAG);
        } else {
                CH_WRITE1(sc, ch, AUVIA_RP_MODE, ch->sc_reg);
                CH_WRITE1(sc, ch, AUVIA_RP_CONTROL, AUVIA_RPCTRL_START);
        }
        mtx_leave(&audio_lock);
        return 0;
}


int
auvia_trigger_input(void *addr, void *start, void *end, int blksize,
    void (*intr)(void *), void *arg, struct audio_params *param)
{
        struct auvia_softc *sc = addr;
        struct auvia_softc_chan *ch = &(sc->sc_record);
        struct auvia_dma *p;

        for (p = sc->sc_dmas; p && p->addr != start; p = p->next)
                ;

        if (!p)
                panic("auvia_trigger_input: request with bad start "
                    "address (%p)", start);

        if (auvia_build_dma_ops(sc, ch, p, start, end, blksize))
                return 1;

        ch->sc_intr = intr;
        ch->sc_arg = arg;

        CH_WRITE4(sc, ch, AUVIA_RP_DMAOPS_BASE,
                  ch->sc_dma_ops_dma->map->dm_segs[0].ds_addr);

        mtx_enter(&audio_lock);
        if (sc->sc_flags & AUVIA_FLAGS_VT8233) {
                if (ch->sc_base != VIA8233_MP_BASE) {
                        CH_WRITE1(sc, ch, VIA8233_RP_DXS_LVOL, 0);
                        CH_WRITE1(sc, ch, VIA8233_RP_DXS_RVOL, 0);
                }
                CH_WRITE1(sc, ch, AUVIA_RP_CONTROL,
                    AUVIA_RPCTRL_START | AUVIA_RPCTRL_AUTOSTART |
                    AUVIA_RPCTRL_STOP  | AUVIA_RPCTRL_EOL | AUVIA_RPCTRL_FLAG);
        } else {
                CH_WRITE1(sc, ch, AUVIA_RP_MODE, ch->sc_reg);
                CH_WRITE1(sc, ch, AUVIA_RP_CONTROL, AUVIA_RPCTRL_START);
        }
        mtx_leave(&audio_lock);
        return 0;
}


int
auvia_intr(void *arg)
{
        struct auvia_softc *sc = arg;
        struct auvia_softc_chan *ch;
        u_int8_t r;
        int i = 0;

        mtx_enter(&audio_lock);
        ch = &sc->sc_record;
        r = CH_READ1(sc, ch, AUVIA_RP_STAT);
        if (r & AUVIA_RPSTAT_INTR) {
                if (sc->sc_record.sc_intr)
                        sc->sc_record.sc_intr(sc->sc_record.sc_arg);

                /* clear interrupts */
                CH_WRITE1(sc, ch, AUVIA_RP_STAT, AUVIA_RPSTAT_INTR);

                i++;
        }
        ch = &sc->sc_play;
        r = CH_READ1(sc, ch, AUVIA_RP_STAT);
        if (r & AUVIA_RPSTAT_INTR) {
                if (sc->sc_play.sc_intr)
                        sc->sc_play.sc_intr(sc->sc_play.sc_arg);

                /* clear interrupts */
                CH_WRITE1(sc, ch, AUVIA_RP_STAT, AUVIA_RPSTAT_INTR);

                i++;
        }
        mtx_leave(&audio_lock);
        return (i? 1 : 0);
}

void
auvia_resume(struct auvia_softc *sc)
{
        pci_conf_read(sc->sc_pc, sc->sc_pt, AUVIA_PCICONF_JUNK);
        pci_conf_write(sc->sc_pc, sc->sc_pt, AUVIA_PCICONF_JUNK,
            sc->sc_pci_junk);

        ac97_resume(&sc->host_if, sc->codec_if);
}