ad1816.c

Go to the documentation of this file.

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
 * Copyright (c) 1997,1998 Luigi Rizzo
 * Copyright (c) 1994,1995 Hannu Savolainen
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 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/sound/isa/ad1816.h>
 
#include <isa/isavar.h>
 
#include "mixer_if.h"
 
SND_DECLARE_FILE("$FreeBSD$");
 
struct ad1816_info;
 
struct ad1816_chinfo {
        struct ad1816_info *parent;
        struct pcm_channel *channel;
        struct snd_dbuf *buffer;
        int dir, blksz;
};
 
struct ad1816_info {
        struct resource *io_base;       /* primary I/O address for the board */
        int io_rid;
        struct resource *irq;
        int irq_rid;
        struct resource *drq1;          /* play */
        int drq1_rid;
        struct resource *drq2;          /* rec */
        int drq2_rid;
        void *ih;
        bus_dma_tag_t parent_dmat;
        struct mtx *lock;
 
        unsigned int bufsize;
        struct ad1816_chinfo pch, rch;
};
 
static u_int32_t ad1816_fmt[] = {
        SND_FORMAT(AFMT_U8, 1, 0),
        SND_FORMAT(AFMT_U8, 2, 0),
        SND_FORMAT(AFMT_S16_LE, 1, 0),
        SND_FORMAT(AFMT_S16_LE, 2, 0),
        SND_FORMAT(AFMT_MU_LAW, 1, 0),
        SND_FORMAT(AFMT_MU_LAW, 2, 0),
        SND_FORMAT(AFMT_A_LAW, 1, 0),
        SND_FORMAT(AFMT_A_LAW, 2, 0),
        0
};
 
static struct pcmchan_caps ad1816_caps = {4000, 55200, ad1816_fmt, 0};
 
#define AD1816_MUTE 31          /* value for mute */
 
static void
ad1816_lock(struct ad1816_info *ad1816)
{
        snd_mtxlock(ad1816->lock);
}
 
static void
ad1816_unlock(struct ad1816_info *ad1816)
{
        snd_mtxunlock(ad1816->lock);
}
 
static int
port_rd(struct resource *port, int off)
{
        if (port)
                return bus_space_read_1(rman_get_bustag(port),
                                        rman_get_bushandle(port),
                                        off);
        else
                return -1;
}
 
static void
port_wr(struct resource *port, int off, u_int8_t data)
{
        if (port)
                bus_space_write_1(rman_get_bustag(port),
                                  rman_get_bushandle(port),
                                  off, data);
}
 
static int
io_rd(struct ad1816_info *ad1816, int reg)
{
        return port_rd(ad1816->io_base, reg);
}
 
static void
io_wr(struct ad1816_info *ad1816, int reg, u_int8_t data)
{
        port_wr(ad1816->io_base, reg, data);
}
 
static void
ad1816_intr(void *arg)
{
        struct ad1816_info *ad1816 = (struct ad1816_info *)arg;
        unsigned char   c, served = 0;
 
        ad1816_lock(ad1816);
        /* get interrupt status */
        c = io_rd(ad1816, AD1816_INT);
 
        /* check for stray interrupts */
        if (c & ~(AD1816_INTRCI | AD1816_INTRPI)) {
                printf("pcm: stray int (%x)\n", c);
                c &= AD1816_INTRCI | AD1816_INTRPI;
        }
        /* check for capture interrupt */
        if (sndbuf_runsz(ad1816->rch.buffer) && (c & AD1816_INTRCI)) {
                ad1816_unlock(ad1816);
                chn_intr(ad1816->rch.channel);
                ad1816_lock(ad1816);
                served |= AD1816_INTRCI;                /* cp served */
        }
        /* check for playback interrupt */
        if (sndbuf_runsz(ad1816->pch.buffer) && (c & AD1816_INTRPI)) {
                ad1816_unlock(ad1816);
                chn_intr(ad1816->pch.channel);
                ad1816_lock(ad1816);
                served |= AD1816_INTRPI;                /* pb served */
        }
        if (served == 0) {
                /* this probably means this is not a (working) ad1816 chip, */
                /* or an error in dma handling                              */
                printf("pcm: int without reason (%x)\n", c);
                c = 0;
        } else c &= ~served;
        io_wr(ad1816, AD1816_INT, c);
        c = io_rd(ad1816, AD1816_INT);
        if (c != 0) printf("pcm: int clear failed (%x)\n", c);
        ad1816_unlock(ad1816);
}
 
static int
ad1816_wait_init(struct ad1816_info *ad1816, int x)
{
        int             n = 0;  /* to shut up the compiler... */
 
        for (; x--;)
                if ((n = (io_rd(ad1816, AD1816_ALE) & AD1816_BUSY)) == 0) DELAY(10);
                else return n;
        printf("ad1816_wait_init failed 0x%02x.\n", n);
        return -1;
}
 
static unsigned short
ad1816_read(struct ad1816_info *ad1816, unsigned int reg)
{
        u_short         x = 0;
 
        if (ad1816_wait_init(ad1816, 100) == -1) return 0;
        io_wr(ad1816, AD1816_ALE, 0);
        io_wr(ad1816, AD1816_ALE, (reg & AD1816_ALEMASK));
        if (ad1816_wait_init(ad1816, 100) == -1) return 0;
        x = (io_rd(ad1816, AD1816_HIGH) << 8) | io_rd(ad1816, AD1816_LOW);
        return x;
}
 
static void
ad1816_write(struct ad1816_info *ad1816, unsigned int reg, unsigned short data)
{
        if (ad1816_wait_init(ad1816, 100) == -1) return;
        io_wr(ad1816, AD1816_ALE, (reg & AD1816_ALEMASK));
        io_wr(ad1816, AD1816_LOW,  (data & 0x000000ff));
        io_wr(ad1816, AD1816_HIGH, (data & 0x0000ff00) >> 8);
}
 
/* -------------------------------------------------------------------- */
 
static int
ad1816mix_init(struct snd_mixer *m)
{
        mix_setdevs(m, AD1816_MIXER_DEVICES);
        mix_setrecdevs(m, AD1816_REC_DEVICES);
        return 0;
}
 
static int
ad1816mix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
{
        struct ad1816_info *ad1816 = mix_getdevinfo(m);
        u_short reg = 0;
 
        /* Scale volumes */
        left = AD1816_MUTE - (AD1816_MUTE * left) / 100;
        right = AD1816_MUTE - (AD1816_MUTE * right) / 100;
 
        reg = (left << 8) | right;
 
        /* do channel selective muting if volume is zero */
        if (left == AD1816_MUTE)        reg |= 0x8000;
        if (right == AD1816_MUTE)       reg |= 0x0080;
 
        ad1816_lock(ad1816);
        switch (dev) {
        case SOUND_MIXER_VOLUME:        /* Register 14 master volume */
                ad1816_write(ad1816, 14, reg);
                break;
 
        case SOUND_MIXER_CD:    /* Register 15 cd */
        case SOUND_MIXER_LINE1:
                ad1816_write(ad1816, 15, reg);
                break;
 
        case SOUND_MIXER_SYNTH: /* Register 16 synth */
                ad1816_write(ad1816, 16, reg);
                break;
 
        case SOUND_MIXER_PCM:   /* Register 4 pcm */
                ad1816_write(ad1816, 4, reg);
                break;
 
        case SOUND_MIXER_LINE:
        case SOUND_MIXER_LINE3: /* Register 18 line in */
                ad1816_write(ad1816, 18, reg);
                break;
 
        case SOUND_MIXER_MIC:   /* Register 19 mic volume */
                ad1816_write(ad1816, 19, reg & ~0xff);  /* mic is mono */
                break;
 
        case SOUND_MIXER_IGAIN:
                /* and now to something completely different ... */
                ad1816_write(ad1816, 20, ((ad1816_read(ad1816, 20) & ~0x0f0f)
                | (((AD1816_MUTE - left) / 2) << 8) /* four bits of adc gain */
                | ((AD1816_MUTE - right) / 2)));
                break;
 
        default:
                printf("ad1816_mixer_set(): unknown device.\n");
                break;
        }
        ad1816_unlock(ad1816);
 
        left = ((AD1816_MUTE - left) * 100) / AD1816_MUTE;
        right = ((AD1816_MUTE - right) * 100) / AD1816_MUTE;
 
        return left | (right << 8);
}
 
static u_int32_t
ad1816mix_setrecsrc(struct snd_mixer *m, u_int32_t src)
{
        struct ad1816_info *ad1816 = mix_getdevinfo(m);
        int dev;
 
        switch (src) {
        case SOUND_MASK_LINE:
        case SOUND_MASK_LINE3:
                dev = 0x00;
                break;
 
        case SOUND_MASK_CD:
        case SOUND_MASK_LINE1:
                dev = 0x20;
                break;
 
        case SOUND_MASK_MIC:
        default:
                dev = 0x50;
                src = SOUND_MASK_MIC;
        }
 
        dev |= dev << 8;
        ad1816_lock(ad1816);
        ad1816_write(ad1816, 20, (ad1816_read(ad1816, 20) & ~0x7070) | dev);
        ad1816_unlock(ad1816);
        return src;
}
 
static kobj_method_t ad1816mixer_methods[] = {
        KOBJMETHOD(mixer_init,          ad1816mix_init),
        KOBJMETHOD(mixer_set,           ad1816mix_set),
        KOBJMETHOD(mixer_setrecsrc,     ad1816mix_setrecsrc),
        KOBJMETHOD_END
};
MIXER_DECLARE(ad1816mixer);
 
/* -------------------------------------------------------------------- */
/* channel interface */
static void *
ad1816chan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
{
        struct ad1816_info *ad1816 = devinfo;
        struct ad1816_chinfo *ch = (dir == PCMDIR_PLAY)? &ad1816->pch : &ad1816->rch;
 
        ch->dir = dir;
        ch->parent = ad1816;
        ch->channel = c;
        ch->buffer = b;
        if (sndbuf_alloc(ch->buffer, ad1816->parent_dmat, 0, ad1816->bufsize) != 0)
                return NULL;
 
        sndbuf_dmasetup(ch->buffer, (dir == PCMDIR_PLAY) ? ad1816->drq1 :
            ad1816->drq2);
        if (SND_DMA(ch->buffer))
                sndbuf_dmasetdir(ch->buffer, dir);
 
        return ch;
}
 
static int
ad1816chan_setformat(kobj_t obj, void *data, u_int32_t format)
{
        struct ad1816_chinfo *ch = data;
        struct ad1816_info *ad1816 = ch->parent;
        int fmt = AD1816_U8, reg;
 
        ad1816_lock(ad1816);
        if (ch->dir == PCMDIR_PLAY) {
                reg = AD1816_PLAY;
                ad1816_write(ad1816, 8, 0x0000);        /* reset base and current counter */
                ad1816_write(ad1816, 9, 0x0000);        /* for playback and capture */
        } else {
                reg = AD1816_CAPT;
                ad1816_write(ad1816, 10, 0x0000);
                ad1816_write(ad1816, 11, 0x0000);
        }
        switch (AFMT_ENCODING(format)) {
        case AFMT_A_LAW:
                fmt = AD1816_ALAW;
                break;
 
        case AFMT_MU_LAW:
                fmt = AD1816_MULAW;
                break;
 
        case AFMT_S16_LE:
                fmt = AD1816_S16LE;
                break;
 
        case AFMT_S16_BE:
                fmt = AD1816_S16BE;
                break;
 
        case AFMT_U8:
                fmt = AD1816_U8;
                break;
        }
        if (AFMT_CHANNEL(format) > 1) fmt |= AD1816_STEREO;
        io_wr(ad1816, reg, fmt);
        ad1816_unlock(ad1816);
#if 0
        return format;
#else
        return 0;
#endif
}
 
static u_int32_t
ad1816chan_setspeed(kobj_t obj, void *data, u_int32_t speed)
{
        struct ad1816_chinfo *ch = data;
        struct ad1816_info *ad1816 = ch->parent;
 
        RANGE(speed, 4000, 55200);
        ad1816_lock(ad1816);
        ad1816_write(ad1816, (ch->dir == PCMDIR_PLAY)? 2 : 3, speed);
        ad1816_unlock(ad1816);
        return speed;
}
 
static u_int32_t
ad1816chan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
{
        struct ad1816_chinfo *ch = data;
 
        ch->blksz = blocksize;
        return ch->blksz;
}
 
static int
ad1816chan_trigger(kobj_t obj, void *data, int go)
{
        struct ad1816_chinfo *ch = data;
        struct ad1816_info *ad1816 = ch->parent;
        int wr, reg;
 
        if (!PCMTRIG_COMMON(go))
                return 0;
 
        sndbuf_dma(ch->buffer, go);
        wr = (ch->dir == PCMDIR_PLAY);
        reg = wr? AD1816_PLAY : AD1816_CAPT;
        ad1816_lock(ad1816);
        switch (go) {
        case PCMTRIG_START:
                /* start only if not already running */
                if (!(io_rd(ad1816, reg) & AD1816_ENABLE)) {
                        int cnt = ((ch->blksz) >> 2) - 1;
                        ad1816_write(ad1816, wr? 8 : 10, cnt); /* count */
                        ad1816_write(ad1816, wr? 9 : 11, 0); /* reset cur cnt */
                        ad1816_write(ad1816, 1, ad1816_read(ad1816, 1) |
                                     (wr? 0x8000 : 0x4000)); /* enable int */
                        /* enable playback */
                        io_wr(ad1816, reg, io_rd(ad1816, reg) | AD1816_ENABLE);
                        if (!(io_rd(ad1816, reg) & AD1816_ENABLE))
                                printf("ad1816: failed to start %s DMA!\n",
                                       wr? "play" : "rec");
                }
                break;
 
        case PCMTRIG_STOP:
        case PCMTRIG_ABORT:             /* XXX check this... */
                /* we don't test here if it is running... */
                if (wr) {
                        ad1816_write(ad1816, 1, ad1816_read(ad1816, 1) &
                                     ~(wr? 0x8000 : 0x4000));
                        /* disable int */
                        io_wr(ad1816, reg, io_rd(ad1816, reg) & ~AD1816_ENABLE);
                        /* disable playback */
                        if (io_rd(ad1816, reg) & AD1816_ENABLE)
                                printf("ad1816: failed to stop %s DMA!\n",
                                       wr? "play" : "rec");
                        ad1816_write(ad1816, wr? 8 : 10, 0); /* reset base cnt */
                        ad1816_write(ad1816, wr? 9 : 11, 0); /* reset cur cnt */
                }
                break;
        }
        ad1816_unlock(ad1816);
        return 0;
}
 
static u_int32_t
ad1816chan_getptr(kobj_t obj, void *data)
{
        struct ad1816_chinfo *ch = data;
        return sndbuf_dmaptr(ch->buffer);
}
 
static struct pcmchan_caps *
ad1816chan_getcaps(kobj_t obj, void *data)
{
        return &ad1816_caps;
}
 
static kobj_method_t ad1816chan_methods[] = {
        KOBJMETHOD(channel_init,                ad1816chan_init),
        KOBJMETHOD(channel_setformat,           ad1816chan_setformat),
        KOBJMETHOD(channel_setspeed,            ad1816chan_setspeed),
        KOBJMETHOD(channel_setblocksize,        ad1816chan_setblocksize),
        KOBJMETHOD(channel_trigger,             ad1816chan_trigger),
        KOBJMETHOD(channel_getptr,              ad1816chan_getptr),
        KOBJMETHOD(channel_getcaps,             ad1816chan_getcaps),
        KOBJMETHOD_END
};
CHANNEL_DECLARE(ad1816chan);
 
/* -------------------------------------------------------------------- */
 
static void
ad1816_release_resources(struct ad1816_info *ad1816, device_t dev)
{
        if (ad1816->irq) {
                if (ad1816->ih)
                        bus_teardown_intr(dev, ad1816->irq, ad1816->ih);
                bus_release_resource(dev, SYS_RES_IRQ, ad1816->irq_rid, ad1816->irq);
                ad1816->irq = NULL;
        }
        if (ad1816->drq1) {
                isa_dma_release(rman_get_start(ad1816->drq1));
                bus_release_resource(dev, SYS_RES_DRQ, ad1816->drq1_rid, ad1816->drq1);
                ad1816->drq1 = NULL;
        }
        if (ad1816->drq2) {
                isa_dma_release(rman_get_start(ad1816->drq2));
                bus_release_resource(dev, SYS_RES_DRQ, ad1816->drq2_rid, ad1816->drq2);
                ad1816->drq2 = NULL;
        }
        if (ad1816->io_base) {
                bus_release_resource(dev, SYS_RES_IOPORT, ad1816->io_rid, ad1816->io_base);
                ad1816->io_base = NULL;
        }
        if (ad1816->parent_dmat) {
                bus_dma_tag_destroy(ad1816->parent_dmat);
                ad1816->parent_dmat = 0;
        }
        if (ad1816->lock)
                snd_mtxfree(ad1816->lock);
 
        free(ad1816, M_DEVBUF);
}
 
static int
ad1816_alloc_resources(struct ad1816_info *ad1816, device_t dev)
{
        int ok = 1, pdma, rdma;
 
        if (!ad1816->io_base)
                ad1816->io_base = bus_alloc_resource_any(dev, 
                        SYS_RES_IOPORT, &ad1816->io_rid, RF_ACTIVE);
        if (!ad1816->irq)
                ad1816->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ,
                        &ad1816->irq_rid, RF_ACTIVE);
        if (!ad1816->drq1)
                ad1816->drq1 = bus_alloc_resource_any(dev, SYS_RES_DRQ,
                        &ad1816->drq1_rid, RF_ACTIVE);
        if (!ad1816->drq2)
                ad1816->drq2 = bus_alloc_resource_any(dev, SYS_RES_DRQ, 
                        &ad1816->drq2_rid, RF_ACTIVE);
 
        if (!ad1816->io_base || !ad1816->drq1 || !ad1816->irq) ok = 0;
 
        if (ok) {
                pdma = rman_get_start(ad1816->drq1);
                isa_dma_acquire(pdma);
                isa_dmainit(pdma, ad1816->bufsize);
                if (ad1816->drq2) {
                        rdma = rman_get_start(ad1816->drq2);
                        isa_dma_acquire(rdma);
                        isa_dmainit(rdma, ad1816->bufsize);
                } else
                        rdma = pdma;
                if (pdma == rdma)
                        pcm_setflags(dev, pcm_getflags(dev) | SD_F_SIMPLEX);
        }
 
        return ok;
}
 
static int
ad1816_init(struct ad1816_info *ad1816, device_t dev)
{
        ad1816_write(ad1816, 1, 0x2);   /* disable interrupts */
        ad1816_write(ad1816, 32, 0x90F0);       /* SoundSys Mode, split fmt */
 
        ad1816_write(ad1816, 5, 0x8080);        /* FM volume mute */
        ad1816_write(ad1816, 6, 0x8080);        /* I2S1 volume mute */
        ad1816_write(ad1816, 7, 0x8080);        /* I2S0 volume mute */
        ad1816_write(ad1816, 17, 0x8888);       /* VID Volume mute */
        ad1816_write(ad1816, 20, 0x5050);       /* recsrc mic, agc off */
        /* adc gain is set to 0 */
 
        return 0;
}
 
static int
ad1816_probe(device_t dev)
{
        char *s = NULL;
        u_int32_t logical_id = isa_get_logicalid(dev);
 
        switch (logical_id) {
        case 0x80719304: /* ADS7180 */
                s = "AD1816";
                break;
        case 0x50719304: /* ADS7150 */
                s = "AD1815";
                break;
        }
 
        if (s) {
                device_set_desc(dev, s);
                return BUS_PROBE_DEFAULT;
        }
        return ENXIO;
}
 
static int
ad1816_attach(device_t dev)
{
        struct ad1816_info *ad1816;
        char status[SND_STATUSLEN], status2[SND_STATUSLEN];
 
        gone_in_dev(dev, 14, "ISA sound driver");
        ad1816 = malloc(sizeof(*ad1816), M_DEVBUF, M_WAITOK | M_ZERO);
        ad1816->lock = snd_mtxcreate(device_get_nameunit(dev),
            "snd_ad1816 softc");
        ad1816->io_rid = 2;
        ad1816->irq_rid = 0;
        ad1816->drq1_rid = 0;
        ad1816->drq2_rid = 1;
        ad1816->bufsize = pcm_getbuffersize(dev, 4096, DSP_BUFFSIZE, 65536);
 
        if (!ad1816_alloc_resources(ad1816, dev)) goto no;
        ad1816_init(ad1816, dev);
        if (mixer_init(dev, &ad1816mixer_class, ad1816)) goto no;
 
        snd_setup_intr(dev, ad1816->irq, 0, ad1816_intr, ad1816, &ad1816->ih);
        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*/ad1816->bufsize, /*nsegments*/1,
                        /*maxsegz*/0x3ffff,
                        /*flags*/0, /*lockfunc*/NULL, /*lockarg*/NULL,
                        &ad1816->parent_dmat) != 0) {
                device_printf(dev, "unable to create dma tag\n");
                goto no;
        }
        if (ad1816->drq2)
                snprintf(status2, SND_STATUSLEN, ":%jd", rman_get_start(ad1816->drq2));
        else
                status2[0] = '\0';
 
        snprintf(status, SND_STATUSLEN, "at io 0x%jx irq %jd drq %jd%s bufsz %u %s",
                rman_get_start(ad1816->io_base),
                rman_get_start(ad1816->irq),
                rman_get_start(ad1816->drq1),
                status2,
                ad1816->bufsize,
                PCM_KLDSTRING(snd_ad1816));
 
        if (pcm_register(dev, ad1816, 1, 1)) goto no;
        pcm_addchan(dev, PCMDIR_REC, &ad1816chan_class, ad1816);
        pcm_addchan(dev, PCMDIR_PLAY, &ad1816chan_class, ad1816);
        pcm_setstatus(dev, status);
 
        return 0;
no:
        ad1816_release_resources(ad1816, dev);
 
        return ENXIO;
 
}
 
static int
ad1816_detach(device_t dev)
{
        int r;
        struct ad1816_info *ad1816;
 
        r = pcm_unregister(dev);
        if (r)
                return r;
 
        ad1816 = pcm_getdevinfo(dev);
        ad1816_release_resources(ad1816, dev);
        return 0;
}
 
static device_method_t ad1816_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,         ad1816_probe),
        DEVMETHOD(device_attach,        ad1816_attach),
        DEVMETHOD(device_detach,        ad1816_detach),
        { 0, 0 }
};
 
static driver_t ad1816_driver = {
        "pcm",
        ad1816_methods,
        PCM_SOFTC_SIZE,
};
 
DRIVER_MODULE(snd_ad1816, isa, ad1816_driver, pcm_devclass, 0, 0);
DRIVER_MODULE(snd_ad1816, acpi, ad1816_driver, pcm_devclass, 0, 0);
MODULE_DEPEND(snd_ad1816, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
MODULE_VERSION(snd_ad1816, 1);