/* $NetBSD: pad.c,v 1.86 2026/01/17 02:01:39 thorpej Exp $ */

/*-
 * Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca>
 * 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 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pad.c,v 1.86 2026/01/17 02:01:39 thorpej Exp $");

#include <sys/param.h>
#include <sys/types.h>

#include <sys/audioio.h>
#include <sys/buf.h>
#include <sys/condvar.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/kauth.h>
#include <sys/kernel.h>
#include <sys/kmem.h>
#include <sys/module.h>
#include <sys/poll.h>
#include <sys/proc.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/vnode.h>

#include <dev/audio/audio_if.h>
#include <dev/audio/audiovar.h>

#include <dev/pad/padvar.h>

#include "ioconf.h"

/* #define PAD_DEBUG */
#ifdef PAD_DEBUG
#define DPRINTF(fmt...) printf(fmt)
#else
#define DPRINTF(fmt...) /**/
#endif

#define PADFREQ         44100
#define PADCHAN         2
#define PADPREC         16

typedef struct pad_block {
        uint8_t         *pb_ptr;
        int             pb_len;
} pad_block_t;

enum {
        PAD_OUTPUT_CLASS,
        PAD_INPUT_CLASS,
        PAD_OUTPUT_MASTER_VOLUME,
        PAD_INPUT_DAC_VOLUME,
        PAD_ENUM_LAST,
};

static int      pad_match(device_t, cfdata_t, void *);
static void     pad_attach(device_t, device_t, void *);
static int      pad_detach(device_t, int);
static void     pad_childdet(device_t, device_t);

static int      pad_query_format(void *, audio_format_query_t *);
static int      pad_set_format(void *, int,
                    const audio_params_t *, const audio_params_t *,
                    audio_filter_reg_t *, audio_filter_reg_t *);
static int      pad_start_output(void *, void *, int,
                    void (*)(void *), void *);
static int      pad_halt_output(void *);
static int      pad_getdev(void *, struct audio_device *);
static int      pad_set_port(void *, mixer_ctrl_t *);
static int      pad_get_port(void *, mixer_ctrl_t *);
static int      pad_query_devinfo(void *, mixer_devinfo_t *);
static int      pad_get_props(void *);
static void     pad_get_locks(void *, kmutex_t **, kmutex_t **);

static void     pad_done_output(void *);
static void     pad_swvol_codec(audio_filter_arg_t *);

static void     pad_close(struct pad_softc *);
static int      pad_read(struct pad_softc *, off_t *, struct uio *,
                    kauth_cred_t, int);

static int      fops_pad_close(struct file *);
static int      fops_pad_read(struct file *, off_t *, struct uio *,
                    kauth_cred_t, int);
static int      fops_pad_write(struct file *, off_t *, struct uio *,
                    kauth_cred_t, int);
static int      fops_pad_ioctl(struct file *, u_long, void *);
static int      fops_pad_kqfilter(struct file *, struct knote *);
static int      fops_pad_poll(struct file *, int);
static int      fops_pad_stat(struct file *, struct stat *);
static int      fops_pad_mmap(struct file *, off_t *, size_t, int, int *, int *,
                    struct uvm_object **, int *);

static const struct audio_hw_if pad_hw_if = {
        .query_format   = pad_query_format,
        .set_format     = pad_set_format,
        .start_output   = pad_start_output,
        .halt_output    = pad_halt_output,
        .getdev         = pad_getdev,
        .set_port       = pad_set_port,
        .get_port       = pad_get_port,
        .query_devinfo  = pad_query_devinfo,
        .get_props      = pad_get_props,
        .get_locks      = pad_get_locks,
};

#define PAD_NFORMATS    1
static const struct audio_format pad_formats[PAD_NFORMATS] = {
        {
                .mode           = AUMODE_PLAY,
                .encoding       = AUDIO_ENCODING_SLINEAR_LE,
                .validbits      = PADPREC,
                .precision      = PADPREC,
                .channels       = PADCHAN,
                .channel_mask   = AUFMT_STEREO,
                .frequency_type = 1,
                .frequency      = { PADFREQ },
        },
};

extern void     padattach(int);

static int      pad_add_block(struct pad_softc *, uint8_t *, int);
static int      pad_get_block(struct pad_softc *, pad_block_t *, int, int);

static dev_type_open(pad_open);

const struct cdevsw pad_cdevsw = {
        .d_open         = pad_open,
        .d_close        = noclose,
        .d_read         = noread,
        .d_write        = nowrite,
        .d_ioctl        = noioctl,
        .d_stop         = nostop,
        .d_tty          = notty,
        .d_poll         = nopoll,
        .d_mmap         = nommap,
        .d_kqfilter     = nokqfilter,
        .d_discard      = nodiscard,
        .d_flag         = D_OTHER | D_MPSAFE,
};

const struct fileops pad_fileops = {
        .fo_name        = "pad",
        .fo_read        = fops_pad_read,
        .fo_write       = fops_pad_write,
        .fo_ioctl       = fops_pad_ioctl,
        .fo_fcntl       = fnullop_fcntl,
        .fo_stat        = fops_pad_stat,
        .fo_poll        = fops_pad_poll,
        .fo_close       = fops_pad_close,
        .fo_mmap        = fops_pad_mmap,
        .fo_kqfilter    = fops_pad_kqfilter,
        .fo_restart     = fnullop_restart
};

CFATTACH_DECL2_NEW(pad, sizeof(struct pad_softc),
    pad_match, pad_attach, pad_detach,
    NULL, NULL, pad_childdet);

void
padattach(int n)
{
        int error;

        error = config_cfattach_attach(pad_cd.cd_name, &pad_ca);
        if (error) {
                aprint_error("%s: couldn't register cfattach: %d\n",
                    pad_cd.cd_name, error);
                config_cfdriver_detach(&pad_cd);
                return;
        }
}

static int
pad_match(device_t parent, cfdata_t data, void *opaque)
{

        return 1;
}

static void
pad_attach(device_t parent, device_t self, void *opaque)
{
        struct pad_softc *sc = device_private(self);

        KASSERT(KERNEL_LOCKED_P());

        aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n");

        sc->sc_dev = self;

        cv_init(&sc->sc_condvar, device_xname(sc->sc_dev));
        mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
        mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_SOFTCLOCK);
        callout_init(&sc->sc_pcallout, CALLOUT_MPSAFE);
        callout_setfunc(&sc->sc_pcallout, pad_done_output, sc);

        sc->sc_swvol = 255;
        sc->sc_buflen = 0;
        sc->sc_rpos = sc->sc_wpos = 0;
        sc->sc_audiodev = audio_attach_mi(&pad_hw_if, sc, sc->sc_dev);

        if (!pmf_device_register(sc->sc_dev, NULL, NULL))
                aprint_error_dev(sc->sc_dev,
                    "couldn't establish power handler\n");

        sc->sc_open = 1;
}

static int
pad_detach(device_t self, int flags)
{
        struct pad_softc *sc = device_private(self);
        int cmaj, mn;
        int error;

        KASSERT(KERNEL_LOCKED_P());

        /* Prevent detach without going through close -- e.g., drvctl.  */
        if (sc->sc_open)
                return EBUSY;

        error = config_detach_children(self, flags);
        if (error)
                return error;

        cmaj = cdevsw_lookup_major(&pad_cdevsw);
        mn = device_unit(sc->sc_dev);
        vdevgone(cmaj, mn, mn, VCHR);

        pmf_device_deregister(sc->sc_dev);

        callout_destroy(&sc->sc_pcallout);
        mutex_destroy(&sc->sc_lock);
        mutex_destroy(&sc->sc_intr_lock);
        cv_destroy(&sc->sc_condvar);

        return 0;
}

static void
pad_childdet(device_t self, device_t child)
{
        struct pad_softc *sc = device_private(self);

        KASSERT(KERNEL_LOCKED_P());

        if (child == sc->sc_audiodev)
                sc->sc_audiodev = NULL;
}

static int
pad_add_block(struct pad_softc *sc, uint8_t *blk, int blksize)
{
        int foff, flen, tlen;

        KASSERT(blksize >= 0);
        KASSERT(mutex_owned(&sc->sc_intr_lock));

        if (blksize > PAD_BUFSIZE ||
            sc->sc_buflen > PAD_BUFSIZE - (unsigned)blksize)
                return ENOBUFS;

        foff = sc->sc_wpos;
        if (sc->sc_wpos + blksize <= PAD_BUFSIZE) {
                flen = blksize;
                tlen = 0;
        } else {
                flen = PAD_BUFSIZE - sc->sc_wpos;
                tlen = blksize - flen;
        }

        sc->sc_wpos = foff + blksize;
        if (sc->sc_wpos >= PAD_BUFSIZE)
                sc->sc_wpos -= PAD_BUFSIZE;

        /*
         * release interrupt lock for bulk copy to audio buffer
         */
        mutex_exit(&sc->sc_intr_lock);
        memcpy(sc->sc_audiobuf + foff, blk, flen);
        memcpy(sc->sc_audiobuf, blk + flen, tlen);
        mutex_enter(&sc->sc_intr_lock);

        sc->sc_buflen += blksize;
        cv_broadcast(&sc->sc_condvar);

        return 0;
}

static int
pad_get_block(struct pad_softc *sc, pad_block_t *pb, int maxblksize, int dowait)
{
        int l, blksize, error;

        KASSERT(maxblksize > 0);
        KASSERT(mutex_owned(&sc->sc_intr_lock));

        if (sc->sc_buflen == 0 && !dowait)
                return EAGAIN;

        while (sc->sc_buflen == 0) {
                DPRINTF("%s: wait\n", __func__);
                error = cv_wait_sig(&sc->sc_condvar, &sc->sc_intr_lock);
                DPRINTF("%s: wake up %d\n", __func__, err);
                if (error)
                        return error;
        }
        blksize = uimin(maxblksize, sc->sc_buflen);

        pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos);
        if (sc->sc_rpos + blksize < PAD_BUFSIZE) {
                pb->pb_len = blksize;
                sc->sc_rpos += blksize;
        } else {
                l = PAD_BUFSIZE - sc->sc_rpos;
                pb->pb_len = l;
                sc->sc_rpos = 0;
        }
        sc->sc_buflen -= pb->pb_len;

        return 0;
}

static int
pad_open(dev_t dev, int flags, int fmt, struct lwp *l)
{
        struct file *fp = NULL;
        device_t self;
        struct pad_softc *sc = NULL;
        cfdata_t cf = NULL;
        int error, fd;

        error = fd_allocfile(&fp, &fd);
        if (error)
                goto out;

        cf = kmem_alloc(sizeof(*cf), KM_SLEEP);
        cf->cf_name = pad_cd.cd_name;
        cf->cf_atname = pad_cd.cd_name;
        cf->cf_unit = 0;
        cf->cf_fstate = FSTATE_STAR;

        self = config_attach_pseudo(cf);
        if (self == NULL) {
                error = ENXIO;
                goto out;
        }
        sc = device_private(self);
        KASSERT(sc->sc_dev == self);
        cf = NULL;

        error = fd_clone(fp, fd, flags, &pad_fileops, sc);
        KASSERT(error == EMOVEFD);
        fp = NULL;
        sc = NULL;

out:    if (sc)
                pad_close(sc);
        if (cf)
                kmem_free(cf, sizeof(*cf));
        if (fp)
                fd_abort(curproc, fp, fd);
        return error;
}

static void
pad_close(struct pad_softc *sc)
{
        device_t self = sc->sc_dev;
        cfdata_t cf = device_cfdata(self);

        /*
         * XXX This is not quite enough to prevent racing with drvctl
         * detach.  What can happen:
         *
         *      cpu0                            cpu1
         *
         *      pad_close
         *      take kernel lock
         *      sc->sc_open = 0
         *      drop kernel lock
         *      wait for config_misc_lock
         *                                      drvctl detach
         *                                      take kernel lock
         *                                      drop kernel lock
         *                                      wait for config_misc_lock
         *                                      retake kernel lock
         *                                      drop config_misc_lock
         *      take config_misc_lock
         *      wait for kernel lock
         *                                      pad_detach (sc_open=0 already)
         *                                      free device
         *                                      drop kernel lock
         *      use device after free
         *
         * We need a way to grab a reference to the device so it won't
         * be freed until we're done -- it's OK if we config_detach
         * twice as long as it's idempotent, but not OK if the first
         * config_detach frees the struct device before the second one
         * has finished handling it.
         */
        KERNEL_LOCK(1, NULL);
        KASSERT(sc->sc_open);
        sc->sc_open = 0;
        (void)config_detach(self, DETACH_FORCE);
        KERNEL_UNLOCK_ONE(NULL);

        kmem_free(cf, sizeof(*cf));
}

static int
fops_pad_close(struct file *fp)
{
        struct pad_softc *sc = fp->f_pad;

        pad_close(sc);

        return 0;
}

static int
fops_pad_poll(struct file *fp, int events)
{

        return POLLERR;
}

static int
fops_pad_kqfilter(struct file *fp, struct knote *kn)
{
        struct pad_softc *sc = fp->f_pad;
        dev_t dev;

        dev = makedev(cdevsw_lookup_major(&pad_cdevsw),
            device_unit(sc->sc_dev));

        return seltrue_kqfilter(dev, kn);
}

static int
fops_pad_ioctl(struct file *fp, u_long cmd, void *data)
{

        return ENODEV;
}

static int
fops_pad_stat(struct file *fp, struct stat *st)
{
        struct pad_softc *sc = fp->f_pad;

        memset(st, 0, sizeof(*st));

        st->st_dev = makedev(cdevsw_lookup_major(&pad_cdevsw),
            device_unit(sc->sc_dev));

        st->st_uid = kauth_cred_geteuid(fp->f_cred);
        st->st_gid = kauth_cred_getegid(fp->f_cred);
        st->st_mode = S_IFCHR;

        return 0;
}

static int
fops_pad_mmap(struct file *fp, off_t *offp, size_t len, int prot, int *flagsp,
    int *advicep, struct uvm_object **uobjp, int *maxprotp)
{

        return 1;
}

static int
fops_pad_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred,
    int ioflag)
{
        struct pad_softc *sc = fp->f_pad;

        return pad_read(sc, offp, uio, cred, ioflag);
}

static int
pad_read(struct pad_softc *sc, off_t *offp, struct uio *uio, kauth_cred_t cred,
    int ioflag)
{
        pad_block_t pb;
        int err, first;

        err = 0;
        first = 1;
        DPRINTF("%s: resid=%zu\n", __func__, uio->uio_resid);
        while (uio->uio_resid > 0) {
                mutex_enter(&sc->sc_intr_lock);
                err = pad_get_block(sc, &pb, MIN(uio->uio_resid, INT_MAX), first);
                mutex_exit(&sc->sc_intr_lock);
                first = 0;
                if (err == EAGAIN) {
                        err = 0;
                        break;
                }
                if (err)
                        break;

                DPRINTF("%s: move %d\n", __func__, pb.pb_len);
                err = uiomove(pb.pb_ptr, pb.pb_len, uio);
                if (err)
                        break;
        }

        return err;
}

static int
fops_pad_write(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred,
    int ioflag)
{

        return EOPNOTSUPP;
}

static int
pad_query_format(void *opaque, audio_format_query_t *afp)
{

        return audio_query_format(pad_formats, PAD_NFORMATS, afp);
}

static int
pad_set_format(void *opaque, int setmode,
    const audio_params_t *play, const audio_params_t *rec,
    audio_filter_reg_t *pfil, audio_filter_reg_t *rfil)
{
        struct pad_softc *sc = opaque;

        KASSERT(mutex_owned(&sc->sc_lock));

        /* XXX playback only */
        pfil->codec = pad_swvol_codec;
        pfil->context = sc;

        return 0;
}

static int
pad_start_output(void *opaque, void *block, int blksize,
    void (*intr)(void *), void *intrarg)
{
        struct pad_softc *sc = opaque;
        int err;
        u_int framesize;
        int ticks;

        KASSERT(mutex_owned(&sc->sc_intr_lock));

        sc->sc_intr = intr;
        sc->sc_intrarg = intrarg;

        DPRINTF("%s: blksize=%d\n", __func__, blksize);
        err = pad_add_block(sc, block, blksize);
        if (err) {
                DPRINTF("%s: failed: %d\n", __func__, err);
                /* "Silently" drop overflows, but keep pace */
                err = 0;
        }

        framesize = PADCHAN * (PADPREC / NBBY) * PADFREQ;

        sc->sc_resid += blksize;
        ticks = mstohz(sc->sc_resid * 1000 / framesize);
        sc->sc_resid -= hztoms(ticks) * framesize / 1000;

        DPRINTF("%s: callout ms=%d\n", __func__, ms);
        callout_schedule(&sc->sc_pcallout, ticks);

        return err;
}

static int
pad_halt_output(void *opaque)
{
        struct pad_softc *sc = opaque;

        DPRINTF("%s\n", __func__);
        KASSERT(mutex_owned(&sc->sc_intr_lock));

        callout_halt(&sc->sc_pcallout, &sc->sc_intr_lock);

        sc->sc_intr = NULL;
        sc->sc_intrarg = NULL;
        sc->sc_buflen = 0;
        sc->sc_resid = 0;
        sc->sc_rpos = sc->sc_wpos = 0;

        return 0;
}

static void
pad_done_output(void *arg)
{
        struct pad_softc *sc = arg;

        DPRINTF("%s\n", __func__);

        mutex_enter(&sc->sc_intr_lock);
        (*sc->sc_intr)(sc->sc_intrarg);
        mutex_exit(&sc->sc_intr_lock);
}

static int
pad_getdev(void *opaque, struct audio_device *ret)
{

        strlcpy(ret->name, "Virtual Audio", sizeof(ret->name));
        strlcpy(ret->version, osrelease, sizeof(ret->version));
        strlcpy(ret->config, "pad", sizeof(ret->config));

        return 0;
}

static int
pad_set_port(void *opaque, mixer_ctrl_t *mc)
{
        struct pad_softc *sc = opaque;

        KASSERT(mutex_owned(&sc->sc_lock));

        switch (mc->dev) {
        case PAD_OUTPUT_MASTER_VOLUME:
        case PAD_INPUT_DAC_VOLUME:
                if (mc->un.value.num_channels != 1)
                        return EINVAL;
                sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO];
                return 0;
        }

        return ENXIO;
}

static int
pad_get_port(void *opaque, mixer_ctrl_t *mc)
{
        struct pad_softc *sc = opaque;

        KASSERT(mutex_owned(&sc->sc_lock));

        switch (mc->dev) {
        case PAD_OUTPUT_MASTER_VOLUME:
        case PAD_INPUT_DAC_VOLUME:
                if (mc->un.value.num_channels != 1)
                        return EINVAL;
                mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol;
                return 0;
        }

        return ENXIO;
}

static int
pad_query_devinfo(void *opaque, mixer_devinfo_t *di)
{
        struct pad_softc *sc __diagused = opaque;

        KASSERT(mutex_owned(&sc->sc_lock));

        switch (di->index) {
        case PAD_OUTPUT_CLASS:
                di->mixer_class = PAD_OUTPUT_CLASS;
                strcpy(di->label.name, AudioCoutputs);
                di->type = AUDIO_MIXER_CLASS;
                di->next = di->prev = AUDIO_MIXER_LAST;
                return 0;
        case PAD_INPUT_CLASS:
                di->mixer_class = PAD_INPUT_CLASS;
                strcpy(di->label.name, AudioCinputs);
                di->type = AUDIO_MIXER_CLASS;
                di->next = di->prev = AUDIO_MIXER_LAST;
                return 0;
        case PAD_OUTPUT_MASTER_VOLUME:
                di->mixer_class = PAD_OUTPUT_CLASS;
                strcpy(di->label.name, AudioNmaster);
                di->type = AUDIO_MIXER_VALUE;
                di->next = di->prev = AUDIO_MIXER_LAST;
                di->un.v.num_channels = 1;
                strcpy(di->un.v.units.name, AudioNvolume);
                return 0;
        case PAD_INPUT_DAC_VOLUME:
                di->mixer_class = PAD_INPUT_CLASS;
                strcpy(di->label.name, AudioNdac);
                di->type = AUDIO_MIXER_VALUE;
                di->next = di->prev = AUDIO_MIXER_LAST;
                di->un.v.num_channels = 1;
                strcpy(di->un.v.units.name, AudioNvolume);
                return 0;
        }

        return ENXIO;
}

static int
pad_get_props(void *opaque)
{

        return AUDIO_PROP_PLAYBACK;
}

static void
pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread)
{
        struct pad_softc *sc = opaque;

        *intr = &sc->sc_intr_lock;
        *thread = &sc->sc_lock;
}

static void
pad_swvol_codec(audio_filter_arg_t *arg)
{
        struct pad_softc *sc = arg->context;
        const uint8_t *src;
        uint8_t *dst;
        u_int sample_count;
        u_int i;
        u_int bits;

        src = arg->src;
        dst = arg->dst;
        sample_count = arg->count * arg->srcfmt->channels;
        bits = arg->srcfmt->precision;

        for (i = 0; i < sample_count; i++) {
                int64_t v;

                switch (howmany(bits, NBBY)) {
                case 2: /* AUDIO_INTERNAL_BITS == 16 */
                        v = *(const int16_t *)src;
                        src += sizeof(int16_t);
                        break;
                case 4: /* AUDIO_INTERNAL_BITS == 32 */
                        v = *(const int32_t *)src;
                        src += sizeof(int32_t);
                        break;
                default:
                        v = 0;
                        break;
                }

                v = v * sc->sc_swvol / 255;

                if (PADPREC > bits)
                        v = v << (PADPREC - bits);
                else if (PADPREC < bits)
                        v = v >> (bits - PADPREC);

                /* AUDIO_ENCODING_SLINEAR_LE */
#if PADPREC > 0
                *dst++ = v;
#endif
#if PADPREC > 8
                v >>= 8;
                *dst++ = v;
#endif
#if PADPREC > 16
                v >>= 8;
                *dst++ = v;
#endif
#if PADPREC > 24
                v >>= 8;
                *dst++ = v;
#endif
        }
}

MODULE(MODULE_CLASS_DRIVER, pad, "audio");

#ifdef _MODULE

#include "ioconf.c"

devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR;

/*
 * We need our own version of cfattach since config(1)'s ioconf does not
 * generate what we need
 */

static struct cfattach *pad_cfattachinit[] = { &pad_ca, NULL };

static struct cfattachinit pad_cfattach[] = {
        { "pad", pad_cfattachinit, NULL },
        { NULL, NULL, NULL }
};
#endif

static int
pad_modcmd(modcmd_t cmd, void *arg)
{
        int error = 0;

        switch (cmd) {
        case MODULE_CMD_INIT:
#ifdef _MODULE
                error = devsw_attach(pad_cd.cd_name, NULL, &bmajor,
                            &pad_cdevsw, &cmajor);
                if (error)
                        break;

                pad_cfattach[1] = cfattach_ioconf_pad[0];
                error = config_init_component(cfdriver_ioconf_pad,
                    pad_cfattach, cfdata_ioconf_pad);
                if (error) {
                        devsw_detach(NULL, &pad_cdevsw);
                        break;
                }
#endif
                break;

        case MODULE_CMD_FINI:
#ifdef _MODULE
                error = config_fini_component(cfdriver_ioconf_pad,
                    pad_cfattach, cfdata_ioconf_pad);
                if (error == 0)
                        devsw_detach(NULL, &pad_cdevsw);
#endif
                break;

        default:
                error = ENOTTY;
        }

        return error;
}