/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 1999 Cameron Grant <cg@freebsd.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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_snd.h"
#endif

#include <dev/sound/pcm/sound.h>

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

#include  <dev/sound/isa/sb.h>

#include "mixer_if.h"

#define SOLO_DEFAULT_BUFSZ 16384
#define ABS(x) (((x) < 0)? -(x) : (x))

/* if defined, playback always uses the 2nd channel and full duplex works */
#define ESS18XX_DUPLEX  1

/* more accurate clocks and split audio1/audio2 rates */
#define ESS18XX_NEWSPEED

static u_int32_t ess_playfmt[] = {
        SND_FORMAT(AFMT_U8, 1, 0),
        SND_FORMAT(AFMT_U8, 2, 0),
        SND_FORMAT(AFMT_S8, 1, 0),
        SND_FORMAT(AFMT_S8, 2, 0),
        SND_FORMAT(AFMT_S16_LE, 1, 0),
        SND_FORMAT(AFMT_S16_LE, 2, 0),
        SND_FORMAT(AFMT_U16_LE, 1, 0),
        SND_FORMAT(AFMT_U16_LE, 2, 0),
        0
};
static struct pcmchan_caps ess_playcaps = {6000, 48000, ess_playfmt, 0};

/*
 * Recording output is byte-swapped
 */
static u_int32_t ess_recfmt[] = {
        SND_FORMAT(AFMT_U8, 1, 0),
        SND_FORMAT(AFMT_U8, 2, 0),
        SND_FORMAT(AFMT_S8, 1, 0),
        SND_FORMAT(AFMT_S8, 2, 0),
        SND_FORMAT(AFMT_S16_BE, 1, 0),
        SND_FORMAT(AFMT_S16_BE, 2, 0),
        SND_FORMAT(AFMT_U16_BE, 1, 0),
        SND_FORMAT(AFMT_U16_BE, 2, 0),
        0
};
static struct pcmchan_caps ess_reccaps = {6000, 48000, ess_recfmt, 0};

struct ess_info;

struct ess_chinfo {
        struct ess_info *parent;
        struct pcm_channel *channel;
        struct snd_dbuf *buffer;
        int dir, hwch, stopping;
        u_int32_t fmt, spd, blksz;
};

struct ess_info {
        struct resource *io, *sb, *vc, *mpu, *gp;       /* I/O address for the board */
        struct resource *irq;
        void            *ih;
        bus_dma_tag_t parent_dmat;

        int simplex_dir, type, dmasz[2];
        unsigned int duplex:1, newspeed:1;
        unsigned int bufsz;

        struct ess_chinfo pch, rch;
        struct mtx lock;
};

#define ess_lock(_ess) mtx_lock(&(_ess)->lock)
#define ess_unlock(_ess) mtx_unlock(&(_ess)->lock)
#define ess_lock_assert(_ess) mtx_assert(&(_ess)->lock, MA_OWNED)

static int ess_rd(struct ess_info *sc, int reg);
static void ess_wr(struct ess_info *sc, int reg, u_int8_t val);
static int ess_dspready(struct ess_info *sc);
static int ess_cmd(struct ess_info *sc, u_char val);
static int ess_cmd1(struct ess_info *sc, u_char cmd, int val);
static int ess_get_byte(struct ess_info *sc);
static void ess_setmixer(struct ess_info *sc, u_int port, u_int value);
static int ess_getmixer(struct ess_info *sc, u_int port);
static int ess_reset_dsp(struct ess_info *sc);

static int ess_write(struct ess_info *sc, u_char reg, int val);
static int ess_read(struct ess_info *sc, u_char reg);

static void ess_intr(void *arg);
static int ess_setupch(struct ess_info *sc, int ch, int dir, int spd, u_int32_t fmt, int len);
static int ess_start(struct ess_chinfo *ch);
static int ess_stop(struct ess_chinfo *ch);

static int ess_dmasetup(struct ess_info *sc, int ch, u_int32_t base, u_int16_t cnt, int dir);
static int ess_dmapos(struct ess_info *sc, int ch);
static int ess_dmatrigger(struct ess_info *sc, int ch, int go);

/*
 * Common code for the midi and pcm functions
 *
 * ess_cmd write a single byte to the CMD port.
 * ess_cmd1 write a CMD + 1 byte arg
 * ess_cmd2 write a CMD + 2 byte arg
 * ess_get_byte returns a single byte from the DSP data port
 *
 * ess_write is actually ess_cmd1
 * ess_read access ext. regs via ess_cmd(0xc0, reg) followed by ess_get_byte
 */

static int
port_rd(struct resource *port, int regno, int size)
{
        bus_space_tag_t st = rman_get_bustag(port);
        bus_space_handle_t sh = rman_get_bushandle(port);

        switch (size) {
        case 1:
                return bus_space_read_1(st, sh, regno);
        case 2:
                return bus_space_read_2(st, sh, regno);
        case 4:
                return bus_space_read_4(st, sh, regno);
        default:
                return 0xffffffff;
        }
}

static void
port_wr(struct resource *port, int regno, u_int32_t data, int size)
{
        bus_space_tag_t st = rman_get_bustag(port);
        bus_space_handle_t sh = rman_get_bushandle(port);

        switch (size) {
        case 1:
                bus_space_write_1(st, sh, regno, data);
                break;
        case 2:
                bus_space_write_2(st, sh, regno, data);
                break;
        case 4:
                bus_space_write_4(st, sh, regno, data);
                break;
        }
}

static int
ess_rd(struct ess_info *sc, int reg)
{
        return port_rd(sc->sb, reg, 1);
}

static void
ess_wr(struct ess_info *sc, int reg, u_int8_t val)
{
        port_wr(sc->sb, reg, val, 1);
}

static int
ess_dspready(struct ess_info *sc)
{
        return ((ess_rd(sc, SBDSP_STATUS) & 0x80) == 0);
}

static int
ess_dspwr(struct ess_info *sc, u_char val)
{
        int  i;

        for (i = 0; i < 1000; i++) {
                if (ess_dspready(sc)) {
                        ess_wr(sc, SBDSP_CMD, val);
                        return 1;
                }
                if (i > 10) DELAY((i > 100)? 1000 : 10);
        }
        printf("ess_dspwr(0x%02x) timed out.\n", val);
        return 0;
}

static int
ess_cmd(struct ess_info *sc, u_char val)
{
        DEB(printf("ess_cmd: %x\n", val));
        return ess_dspwr(sc, val);
}

static int
ess_cmd1(struct ess_info *sc, u_char cmd, int val)
{
        DEB(printf("ess_cmd1: %x, %x\n", cmd, val));
        if (ess_dspwr(sc, cmd)) {
                return ess_dspwr(sc, val & 0xff);
        } else return 0;
}

static void
ess_setmixer(struct ess_info *sc, u_int port, u_int value)
{
        DEB(printf("ess_setmixer: reg=%x, val=%x\n", port, value);)
        ess_wr(sc, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
        DELAY(10);
        ess_wr(sc, SB_MIX_DATA, (u_char) (value & 0xff));
        DELAY(10);
}

static int
ess_getmixer(struct ess_info *sc, u_int port)
{
        int val;

        ess_wr(sc, SB_MIX_ADDR, (u_char) (port & 0xff)); /* Select register */
        DELAY(10);
        val = ess_rd(sc, SB_MIX_DATA);
        DELAY(10);

        return val;
}

static int
ess_get_byte(struct ess_info *sc)
{
        int i;

        for (i = 1000; i > 0; i--) {
                if (ess_rd(sc, 0xc) & 0x40)
                        return ess_rd(sc, DSP_READ);
                else
                        DELAY(20);
        }
        return -1;
}

static int
ess_write(struct ess_info *sc, u_char reg, int val)
{
        return ess_cmd1(sc, reg, val);
}

static int
ess_read(struct ess_info *sc, u_char reg)
{
        return (ess_cmd(sc, 0xc0) && ess_cmd(sc, reg))? ess_get_byte(sc) : -1;
}

static int
ess_reset_dsp(struct ess_info *sc)
{
        DEB(printf("ess_reset_dsp\n"));
        ess_wr(sc, SBDSP_RST, 3);
        DELAY(100);
        ess_wr(sc, SBDSP_RST, 0);
        if (ess_get_byte(sc) != 0xAA) {
                DEB(printf("ess_reset_dsp failed\n"));
/*
                           rman_get_start(d->io_base)));
*/
                return ENXIO;   /* Sorry */
        }
        ess_cmd(sc, 0xc6);
        return 0;
}

static void
ess_intr(void *arg)
{
        struct ess_info *sc = (struct ess_info *)arg;
        int src, pirq = 0, rirq = 0;

        ess_lock(sc);
        src = 0;
        if (ess_getmixer(sc, 0x7a) & 0x80)
                src |= 2;
        if (ess_rd(sc, 0x0c) & 0x01)
                src |= 1;

        if (src == 0) {
                ess_unlock(sc);
                return;
        }

        if (sc->duplex) {
                pirq = (src & sc->pch.hwch)? 1 : 0;
                rirq = (src & sc->rch.hwch)? 1 : 0;
        } else {
                if (sc->simplex_dir == PCMDIR_PLAY)
                        pirq = 1;
                if (sc->simplex_dir == PCMDIR_REC)
                        rirq = 1;
                if (!pirq && !rirq)
                        printf("solo: IRQ neither playback nor rec!\n");
        }

        DEB(printf("ess_intr: pirq:%d rirq:%d\n",pirq,rirq));

        if (pirq) {
                if (sc->pch.stopping) {
                        ess_dmatrigger(sc, sc->pch.hwch, 0);
                        sc->pch.stopping = 0;
                        if (sc->pch.hwch == 1)
                                ess_write(sc, 0xb8, ess_read(sc, 0xb8) & ~0x01);
                        else
                                ess_setmixer(sc, 0x78, ess_getmixer(sc, 0x78) & ~0x03);
                }
                ess_unlock(sc);
                chn_intr(sc->pch.channel);
                ess_lock(sc);
        }

        if (rirq) {
                if (sc->rch.stopping) {
                        ess_dmatrigger(sc, sc->rch.hwch, 0);
                        sc->rch.stopping = 0;
                        /* XXX: will this stop audio2? */
                        ess_write(sc, 0xb8, ess_read(sc, 0xb8) & ~0x01);
                }
                ess_unlock(sc);
                chn_intr(sc->rch.channel);
                ess_lock(sc);
        }

        if (src & 2)
                ess_setmixer(sc, 0x7a, ess_getmixer(sc, 0x7a) & ~0x80);
        if (src & 1)
                ess_rd(sc, DSP_DATA_AVAIL);

        ess_unlock(sc);
}

/* utility functions for ESS */
static u_int8_t
ess_calcspeed8(int *spd)
{
        int speed = *spd;
        u_int32_t t;

        if (speed > 22000) {
                t = (795500 + speed / 2) / speed;
                speed = (795500 + t / 2) / t;
                t = (256 - t) | 0x80;
        } else {
                t = (397700 + speed / 2) / speed;
                speed = (397700 + t / 2) / t;
                t = 128 - t;
        }
        *spd = speed;
        return t & 0x000000ff;
}

static u_int8_t
ess_calcspeed9(int *spd)
{
        int speed, s0, s1, use0;
        u_int8_t t0, t1;

        /* rate = source / (256 - divisor) */
        /* divisor = 256 - (source / rate) */
        speed = *spd;
        t0 = 128 - (793800 / speed);
        s0 = 793800 / (128 - t0);

        t1 = 128 - (768000 / speed);
        s1 = 768000 / (128 - t1);
        t1 |= 0x80;

        use0 = (ABS(speed - s0) < ABS(speed - s1))? 1 : 0;

        *spd = use0? s0 : s1;
        return use0? t0 : t1;
}

static u_int8_t
ess_calcfilter(int spd)
{
        int cutoff;

        /* cutoff = 7160000 / (256 - divisor) */
        /* divisor = 256 - (7160000 / cutoff) */
        cutoff = (spd * 9 * 82) / 20;
        return (256 - (7160000 / cutoff));
}

static int
ess_setupch(struct ess_info *sc, int ch, int dir, int spd, u_int32_t fmt, int len)
{
        int play = (dir == PCMDIR_PLAY)? 1 : 0;
        int b16 = (fmt & AFMT_16BIT)? 1 : 0;
        int stereo = (AFMT_CHANNEL(fmt) > 1)? 1 : 0;
        int unsign = (!(fmt & AFMT_SIGNED))? 1 : 0;
        u_int8_t spdval, fmtval;

        DEB(printf("ess_setupch\n"));
        spdval = (sc->newspeed)? ess_calcspeed9(&spd) : ess_calcspeed8(&spd);

        sc->simplex_dir = play ? PCMDIR_PLAY : PCMDIR_REC ;

        if (ch == 1) {
                KASSERT((dir == PCMDIR_PLAY) || (dir == PCMDIR_REC), ("ess_setupch: dir1 bad"));
                len = -len;
                /* transfer length low */
                ess_write(sc, 0xa4, len & 0x00ff);
                /* transfer length high */
                ess_write(sc, 0xa5, (len & 0xff00) >> 8);
                /* autoinit, dma dir */
                ess_write(sc, 0xb8, 0x04 | (play? 0x00 : 0x0a));
                /* mono/stereo */
                ess_write(sc, 0xa8, (ess_read(sc, 0xa8) & ~0x03) | (stereo? 0x01 : 0x02));
                /* demand mode, 4 bytes/xfer */
                ess_write(sc, 0xb9, 0x02);
                /* sample rate */
                ess_write(sc, 0xa1, spdval);
                /* filter cutoff */
                ess_write(sc, 0xa2, ess_calcfilter(spd));
                /* setup dac/adc */
                /*
                if (play)
                        ess_write(sc, 0xb6, unsign? 0x80 : 0x00);
                */
                /* mono, b16: signed, load signal */
                /*
                ess_write(sc, 0xb7, 0x51 | (unsign? 0x00 : 0x20));
                */
                /* setup fifo */
                ess_write(sc, 0xb7, 0x91 | (unsign? 0x00 : 0x20) |
                                           (b16? 0x04 : 0x00) |
                                           (stereo? 0x08 : 0x40));
                /* irq control */
                ess_write(sc, 0xb1, (ess_read(sc, 0xb1) & 0x0f) | 0x50);
                /* drq control */
                ess_write(sc, 0xb2, (ess_read(sc, 0xb2) & 0x0f) | 0x50);
        } else if (ch == 2) {
                KASSERT(dir == PCMDIR_PLAY, ("ess_setupch: dir2 bad"));
                len >>= 1;
                len = -len;
                /* transfer length low */
                ess_setmixer(sc, 0x74, len & 0x00ff);
                /* transfer length high */
                ess_setmixer(sc, 0x76, (len & 0xff00) >> 8);
                /* autoinit, 4 bytes/req */
                ess_setmixer(sc, 0x78, 0x10);
                fmtval = b16 | (stereo << 1) | ((!unsign) << 2);
                /* enable irq, set format */
                ess_setmixer(sc, 0x7a, 0x40 | fmtval);
                if (sc->newspeed) {
                        /* sample rate */
                        ess_setmixer(sc, 0x70, spdval);
                        /* filter cutoff */
                        ess_setmixer(sc, 0x72, ess_calcfilter(spd));
                }
        }
        return 0;
}
static int
ess_start(struct ess_chinfo *ch)
{
        struct ess_info *sc = ch->parent;

        DEB(printf("ess_start\n"););
        ess_setupch(sc, ch->hwch, ch->dir, ch->spd, ch->fmt, ch->blksz);
        ch->stopping = 0;
        if (ch->hwch == 1) {
                ess_write(sc, 0xb8, ess_read(sc, 0xb8) | 0x01);
                if (ch->dir == PCMDIR_PLAY) {
#if 0
                        DELAY(100000); /* 100 ms */
#endif
                        ess_cmd(sc, 0xd1);
                }
        } else
                ess_setmixer(sc, 0x78, ess_getmixer(sc, 0x78) | 0x03);
        return 0;
}

static int
ess_stop(struct ess_chinfo *ch)
{
        struct ess_info *sc = ch->parent;

        DEB(printf("ess_stop\n"));
        ch->stopping = 1;
        if (ch->hwch == 1)
                ess_write(sc, 0xb8, ess_read(sc, 0xb8) & ~0x04);
        else
                ess_setmixer(sc, 0x78, ess_getmixer(sc, 0x78) & ~0x10);
        DEB(printf("done with stop\n"));
        return 0;
}

/* -------------------------------------------------------------------- */
/* channel interface for ESS18xx */
static void *
esschan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
{
        struct ess_info *sc = devinfo;
        struct ess_chinfo *ch = (dir == PCMDIR_PLAY)? &sc->pch : &sc->rch;

        DEB(printf("esschan_init\n"));
        ch->parent = sc;
        ch->channel = c;
        ch->buffer = b;
        ch->dir = dir;
        if (sndbuf_alloc(ch->buffer, sc->parent_dmat, 0, sc->bufsz) != 0)
                return NULL;
        ch->hwch = 1;
        if ((dir == PCMDIR_PLAY) && (sc->duplex))
                ch->hwch = 2;
        return ch;
}

static int
esschan_setformat(kobj_t obj, void *data, u_int32_t format)
{
        struct ess_chinfo *ch = data;

        ch->fmt = format;
        return 0;
}

static u_int32_t
esschan_setspeed(kobj_t obj, void *data, u_int32_t speed)
{
        struct ess_chinfo *ch = data;
        struct ess_info *sc = ch->parent;

        ch->spd = speed;
        if (sc->newspeed)
                ess_calcspeed9(&ch->spd);
        else
                ess_calcspeed8(&ch->spd);
        return ch->spd;
}

static u_int32_t
esschan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
{
        struct ess_chinfo *ch = data;

        ch->blksz = blocksize;
        return ch->blksz;
}

static int
esschan_trigger(kobj_t obj, void *data, int go)
{
        struct ess_chinfo *ch = data;
        struct ess_info *sc = ch->parent;

        if (!PCMTRIG_COMMON(go))
                return 0;

        DEB(printf("esschan_trigger: %d\n",go));

        ess_lock(sc);
        switch (go) {
        case PCMTRIG_START:
                ess_dmasetup(sc, ch->hwch, ch->buffer->buf_addr,
                    ch->buffer->bufsize, ch->dir);
                ess_dmatrigger(sc, ch->hwch, 1);
                ess_start(ch);
                break;

        case PCMTRIG_STOP:
        case PCMTRIG_ABORT:
        default:
                ess_stop(ch);
                break;
        }
        ess_unlock(sc);
        return 0;
}

static u_int32_t
esschan_getptr(kobj_t obj, void *data)
{
        struct ess_chinfo *ch = data;
        struct ess_info *sc = ch->parent;
        u_int32_t ret;

        ess_lock(sc);
        ret = ess_dmapos(sc, ch->hwch);
        ess_unlock(sc);
        return ret;
}

static struct pcmchan_caps *
esschan_getcaps(kobj_t obj, void *data)
{
        struct ess_chinfo *ch = data;

        return (ch->dir == PCMDIR_PLAY)? &ess_playcaps : &ess_reccaps;
}

static kobj_method_t esschan_methods[] = {
        KOBJMETHOD(channel_init,                esschan_init),
        KOBJMETHOD(channel_setformat,           esschan_setformat),
        KOBJMETHOD(channel_setspeed,            esschan_setspeed),
        KOBJMETHOD(channel_setblocksize,        esschan_setblocksize),
        KOBJMETHOD(channel_trigger,             esschan_trigger),
        KOBJMETHOD(channel_getptr,              esschan_getptr),
        KOBJMETHOD(channel_getcaps,             esschan_getcaps),
        KOBJMETHOD_END
};
CHANNEL_DECLARE(esschan);

/************************************************************/

static int
essmix_init(struct snd_mixer *m)
{
        struct ess_info *sc = mix_getdevinfo(m);

        mix_setrecdevs(m, SOUND_MASK_CD | SOUND_MASK_MIC | SOUND_MASK_LINE |
                          SOUND_MASK_IMIX);

        mix_setdevs(m, SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_LINE |
                       SOUND_MASK_MIC | SOUND_MASK_CD | SOUND_MASK_VOLUME |
                       SOUND_MASK_LINE1);

        ess_setmixer(sc, 0, 0); /* reset */

        return 0;
}

static int
essmix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
{
        struct ess_info *sc = mix_getdevinfo(m);
        int preg = 0, rreg = 0, l, r;

        l = (left * 15) / 100;
        r = (right * 15) / 100;
        switch (dev) {
        case SOUND_MIXER_SYNTH:
                preg = 0x36;
                rreg = 0x6b;
                break;

        case SOUND_MIXER_PCM:
                preg = 0x14;
                rreg = 0x7c;
                break;

        case SOUND_MIXER_LINE:
                preg = 0x3e;
                rreg = 0x6e;
                break;

        case SOUND_MIXER_MIC:
                preg = 0x1a;
                rreg = 0x68;
                break;

        case SOUND_MIXER_LINE1:
                preg = 0x3a;
                rreg = 0x6c;
                break;

        case SOUND_MIXER_CD:
                preg = 0x38;
                rreg = 0x6a;
                break;

        case SOUND_MIXER_VOLUME:
                l = left? (left * 63) / 100 : 64;
                r = right? (right * 63) / 100 : 64;
                ess_setmixer(sc, 0x60, l);
                ess_setmixer(sc, 0x62, r);
                left = (l == 64)? 0 : (l * 100) / 63;
                right = (r == 64)? 0 : (r * 100) / 63;
                return left | (right << 8);
        }

        if (preg)
                ess_setmixer(sc, preg, (l << 4) | r);
        if (rreg)
                ess_setmixer(sc, rreg, (l << 4) | r);

        left = (l * 100) / 15;
        right = (r * 100) / 15;

        return left | (right << 8);
}

static u_int32_t
essmix_setrecsrc(struct snd_mixer *m, u_int32_t src)
{
        struct ess_info *sc = mix_getdevinfo(m);
        u_char recdev;

        switch (src) {
        case SOUND_MASK_CD:
                recdev = 0x02;
                break;

        case SOUND_MASK_LINE:
                recdev = 0x06;
                break;

        case SOUND_MASK_IMIX:
                recdev = 0x05;
                break;

        case SOUND_MASK_MIC:
        default:
                recdev = 0x00;
                src = SOUND_MASK_MIC;
                break;
        }

        ess_setmixer(sc, 0x1c, recdev);

        return src;
}

static kobj_method_t solomixer_methods[] = {
        KOBJMETHOD(mixer_init,          essmix_init),
        KOBJMETHOD(mixer_set,           essmix_set),
        KOBJMETHOD(mixer_setrecsrc,     essmix_setrecsrc),
        KOBJMETHOD_END
};
MIXER_DECLARE(solomixer);

/************************************************************/

static int
ess_dmasetup(struct ess_info *sc, int ch, u_int32_t base, u_int16_t cnt, int dir)
{
        KASSERT(ch == 1 || ch == 2, ("bad ch"));
        sc->dmasz[ch - 1] = cnt;
        if (ch == 1) {
                port_wr(sc->vc, 0x8, 0xc4, 1); /* command */
                port_wr(sc->vc, 0xd, 0xff, 1); /* reset */
                port_wr(sc->vc, 0xf, 0x01, 1); /* mask */
                port_wr(sc->vc, 0xb, dir == PCMDIR_PLAY? 0x58 : 0x54, 1); /* mode */
                port_wr(sc->vc, 0x0, base, 4);
                port_wr(sc->vc, 0x4, cnt - 1, 2);

        } else if (ch == 2) {
                port_wr(sc->io, 0x6, 0x08, 1); /* autoinit */
                port_wr(sc->io, 0x0, base, 4);
                port_wr(sc->io, 0x4, cnt, 2);
        }
        return 0;
}

static int
ess_dmapos(struct ess_info *sc, int ch)
{
        int p = 0, i = 0, j = 0;

        KASSERT(ch == 1 || ch == 2, ("bad ch"));
        if (ch == 1) {
/*
 * During recording, this register is known to give back
 * garbage if it's not quiescent while being read. That's
 * why we spl, stop the DMA, and try over and over until
 * adjacent reads are "close", in the right order and not
 * bigger than is otherwise possible.
 */
                ess_dmatrigger(sc, ch, 0);
                DELAY(20);
                do {
                        DELAY(10);
                        if (j > 1)
                                printf("DMA count reg bogus: %04x & %04x\n",
                                        i, p);
                        i = port_rd(sc->vc, 0x4, 2) + 1;
                        p = port_rd(sc->vc, 0x4, 2) + 1;
                } while ((p > sc->dmasz[ch - 1] || i < p || (p - i) > 0x8) && j++ < 1000);
                ess_dmatrigger(sc, ch, 1);
        }
        else if (ch == 2)
                p = port_rd(sc->io, 0x4, 2);
        return sc->dmasz[ch - 1] - p;
}

static int
ess_dmatrigger(struct ess_info *sc, int ch, int go)
{
        KASSERT(ch == 1 || ch == 2, ("bad ch"));
        if (ch == 1)
                port_wr(sc->vc, 0xf, go? 0x00 : 0x01, 1); /* mask */
        else if (ch == 2)
                port_wr(sc->io, 0x6, 0x08 | (go? 0x02 : 0x00), 1); /* autoinit */
        return 0;
}

static void
ess_release_resources(struct ess_info *sc, device_t dev)
{
        if (sc->irq) {
                if (sc->ih)
                        bus_teardown_intr(dev, sc->irq, sc->ih);
                bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq);
                sc->irq = NULL;
        }
        if (sc->io) {
                bus_release_resource(dev, SYS_RES_IOPORT, PCIR_BAR(0), sc->io);
                sc->io = NULL;
        }

        if (sc->sb) {
                bus_release_resource(dev, SYS_RES_IOPORT, PCIR_BAR(1), sc->sb);
                sc->sb = NULL;
        }

        if (sc->vc) {
                bus_release_resource(dev, SYS_RES_IOPORT, PCIR_BAR(2), sc->vc);
                sc->vc = NULL;
        }

        if (sc->mpu) {
                bus_release_resource(dev, SYS_RES_IOPORT, PCIR_BAR(3), sc->mpu);
                sc->mpu = NULL;
        }

        if (sc->gp) {
                bus_release_resource(dev, SYS_RES_IOPORT, PCIR_BAR(4), sc->gp);
                sc->gp = NULL;
        }

        if (sc->parent_dmat) {
                bus_dma_tag_destroy(sc->parent_dmat);
                sc->parent_dmat = 0;
        }

        mtx_destroy(&sc->lock);

        free(sc, M_DEVBUF);
}

static int
ess_alloc_resources(struct ess_info *sc, device_t dev)
{
        int rid;

        rid = PCIR_BAR(0);
        sc->io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);

        rid = PCIR_BAR(1);
        sc->sb = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);

        rid = PCIR_BAR(2);
        sc->vc = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);

        rid = PCIR_BAR(3);
        sc->mpu = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);

        rid = PCIR_BAR(4);
        sc->gp = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);

        rid = 0;
        sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
                RF_ACTIVE | RF_SHAREABLE);

        mtx_init(&sc->lock, device_get_nameunit(dev), "snd_solo softc",
            MTX_DEF);

        return (sc->irq && sc->io && sc->sb && sc->vc &&
                                sc->mpu && sc->gp)? 0 : ENXIO;
}

static int
ess_probe(device_t dev)
{
        char *s = NULL;
        u_int32_t subdev;

        subdev = (pci_get_subdevice(dev) << 16) | pci_get_subvendor(dev);
        switch (pci_get_devid(dev)) {
        case 0x1969125d:
                if (subdev == 0x8888125d)
                        s = "ESS Solo-1E";
                else if (subdev == 0x1818125d)
                        s = "ESS Solo-1";
                else
                        s = "ESS Solo-1 (unknown vendor)";
                break;
        }

        if (s)
                device_set_desc(dev, s);
        return s ? BUS_PROBE_DEFAULT : ENXIO;
}

#define ESS_PCI_LEGACYCONTROL       0x40
#define ESS_PCI_CONFIG              0x50
#define ESS_PCI_DDMACONTROL             0x60

static int 
ess_suspend(device_t dev)
{
  return 0;
}

static int 
ess_resume(device_t dev)
{
        uint16_t ddma;
        struct ess_info *sc = pcm_getdevinfo(dev);

        ess_lock(sc);
        ddma = rman_get_start(sc->vc) | 1;
        pci_write_config(dev, ESS_PCI_LEGACYCONTROL, 0x805f, 2);
        pci_write_config(dev, ESS_PCI_DDMACONTROL, ddma, 2);
        pci_write_config(dev, ESS_PCI_CONFIG, 0, 2);

        if (ess_reset_dsp(sc)) {
                ess_unlock(sc);
                goto no;
        }
        ess_unlock(sc);
        if (mixer_reinit(dev))
                goto no;
        ess_lock(sc);
        if (sc->newspeed)
                ess_setmixer(sc, 0x71, 0x2a);

        port_wr(sc->io, 0x7, 0xb0, 1); /* enable irqs */
        ess_unlock(sc);

        return 0;
 no:
        return EIO;
}

static int
ess_attach(device_t dev)
{
        struct ess_info *sc;
        char status[SND_STATUSLEN];
        u_int16_t ddma;

        sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
        pci_enable_busmaster(dev);

        if (ess_alloc_resources(sc, dev))
                goto no;

        sc->bufsz = pcm_getbuffersize(dev, 4096, SOLO_DEFAULT_BUFSZ, 65536);

        ddma = rman_get_start(sc->vc) | 1;
        pci_write_config(dev, ESS_PCI_LEGACYCONTROL, 0x805f, 2);
        pci_write_config(dev, ESS_PCI_DDMACONTROL, ddma, 2);
        pci_write_config(dev, ESS_PCI_CONFIG, 0, 2);

        port_wr(sc->io, 0x7, 0xb0, 1); /* enable irqs */
#ifdef ESS18XX_DUPLEX
        sc->duplex = 1;
#else
        sc->duplex = 0;
#endif

#ifdef ESS18XX_NEWSPEED
        sc->newspeed = 1;
#else
        sc->newspeed = 0;
#endif
        if (snd_setup_intr(dev, sc->irq, INTR_MPSAFE, ess_intr, sc, &sc->ih)) {
                device_printf(dev, "unable to map interrupt\n");
                goto no;
        }

        if (!sc->duplex)
                pcm_setflags(dev, pcm_getflags(dev) | SD_F_SIMPLEX);

#if 0
        if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/65536, /*boundary*/0,
#endif
        if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2, /*boundary*/0,
                        /*lowaddr*/BUS_SPACE_MAXADDR_24BIT,
                        /*highaddr*/BUS_SPACE_MAXADDR,
                        /*filter*/NULL, /*filterarg*/NULL,
                        /*maxsize*/sc->bufsz, /*nsegments*/1,
                        /*maxsegz*/0x3ffff,
                        /*flags*/0,
                        /*lockfunc*/NULL, /*lockarg*/NULL,
                        &sc->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto no;
        }

        if (ess_reset_dsp(sc))
                goto no;

        if (sc->newspeed)
                ess_setmixer(sc, 0x71, 0x2a);

        if (mixer_init(dev, &solomixer_class, sc))
                goto no;

        snprintf(status, SND_STATUSLEN, "port 0x%jx,0x%jx,0x%jx irq %jd on %s",
                rman_get_start(sc->io), rman_get_start(sc->sb), rman_get_start(sc->vc),
                rman_get_start(sc->irq),
                device_get_nameunit(device_get_parent(dev)));

        pcm_init(dev, sc);
        pcm_addchan(dev, PCMDIR_REC, &esschan_class, sc);
        pcm_addchan(dev, PCMDIR_PLAY, &esschan_class, sc);
        if (pcm_register(dev, status))
                goto no;

        return 0;

no:
        ess_release_resources(sc, dev);
        return ENXIO;
}

static int
ess_detach(device_t dev)
{
        int r;
        struct ess_info *sc;

        r = pcm_unregister(dev);
        if (r)
                return r;

        sc = pcm_getdevinfo(dev);
        ess_release_resources(sc, dev);
        return 0;
}

static device_method_t ess_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,         ess_probe),
        DEVMETHOD(device_attach,        ess_attach),
        DEVMETHOD(device_detach,        ess_detach),
        DEVMETHOD(device_resume,        ess_resume),
        DEVMETHOD(device_suspend,       ess_suspend),
        DEVMETHOD_END
};

static driver_t ess_driver = {
        "pcm",
        ess_methods,
        PCM_SOFTC_SIZE,
};

DRIVER_MODULE(snd_solo, pci, ess_driver, 0, 0);
MODULE_DEPEND(snd_solo, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
MODULE_VERSION(snd_solo, 1);