/*      $NetBSD: ite_compat.c,v 1.14 2023/03/26 15:12:34 andvar Exp $   */

/*
 * Copyright (C) 2000 Scott Reynolds
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

/*
 * The main thing to realize about this emulator is that the old console
 * emulator was largely compatible with the DEC VT-220.  Since the
 * wsdisplay driver has a more complete emulation of that terminal, it's
 * reasonable to pass virtually everything up to that driver without
 * modification.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ite_compat.c,v 1.14 2023/03/26 15:12:34 andvar Exp $");

#include "ite.h"
#include "wsdisplay.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/ttycom.h>

#include <dev/cons.h>

#include <machine/cpu.h>
#include <machine/iteioctl.h>

#include "ioconf.h"

dev_type_open(iteopen);
dev_type_close(iteclose);
dev_type_read(iteread);
dev_type_write(itewrite);
dev_type_ioctl(iteioctl);
dev_type_tty(itetty);
dev_type_poll(itepoll);
dev_type_kqfilter(itekqfilter);

const struct cdevsw ite_cdevsw = {
        .d_open = iteopen,
        .d_close = iteclose,
        .d_read = iteread,
        .d_write = itewrite,
        .d_ioctl = iteioctl,
        .d_stop = nostop,
        .d_tty = itetty,
        .d_poll = itepoll,
        .d_mmap = nommap,
        .d_kqfilter = itekqfilter,
        .d_discard = nodiscard,
        .d_flag = D_TTY
};

#if NWSDISPLAY > 0
extern const struct cdevsw wsdisplay_cdevsw;
#endif

static int      ite_initted = 0;
static int      ite_bell_freq = 1880;
static int      ite_bell_length = 10;
static int      ite_bell_volume = 100;


/*ARGSUSED*/
void
iteattach(int n)
{
#if NWSDISPLAY > 0
        int maj;

        maj = cdevsw_lookup_major(&wsdisplay_cdevsw);
        KASSERT(maj != -1);

        if (maj != major(cn_tab->cn_dev))
                return;

        ite_initted = 1;
#endif
}

/*
 * Tty handling functions
 */

/*ARGSUSED*/
int
iteopen(dev_t dev, int mode, int devtype, struct lwp *l)
{
        return ite_initted ? (0) : (ENXIO);
}

/*ARGSUSED*/
int
iteclose(dev_t dev, int flag, int mode, struct lwp *l)
{
        return ite_initted ? (0) : (ENXIO);
}

/*ARGSUSED*/
int
iteread(dev_t dev, struct uio *uio, int flag)
{
        return ite_initted ?
            (*wsdisplay_cdevsw.d_read)(cn_tab->cn_dev, uio, flag) : (ENXIO);
}

/*ARGSUSED*/
int
itewrite(dev_t dev, struct uio *uio, int flag)
{
        return ite_initted ?
            (*wsdisplay_cdevsw.d_write)(cn_tab->cn_dev, uio, flag) : (ENXIO);
}

/*ARGSUSED*/
struct tty *
itetty(dev_t dev)
{
        return ite_initted ? (*wsdisplay_cdevsw.d_tty)(cn_tab->cn_dev) : (NULL);
}

/*ARGSUSED*/
int
iteioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
{
        if (!ite_initted)
                return (ENXIO);

        switch (cmd) {
        case ITEIOC_RINGBELL:
                return mac68k_ring_bell(ite_bell_freq,
                    ite_bell_length, ite_bell_volume);
        case ITEIOC_SETBELL:
                {
                        struct bellparams *bp = (void *)addr;

                        /* Do some sanity checks. */
                        if (bp->freq < 10 || bp->freq > 40000)
                                return (EINVAL);
                        if (bp->len < 0 || bp->len > 3600)
                                return (EINVAL);
                        if (bp->vol < 0 || bp->vol > 100)
                                return (EINVAL);

                        ite_bell_freq = bp->freq;
                        ite_bell_length = bp->len;
                        ite_bell_volume = bp->vol;
                        return (0);
                }
        case ITEIOC_GETBELL:
                {
                        struct bellparams *bp = (void *)addr;

                        ite_bell_freq = bp->freq;
                        ite_bell_length = bp->len;
                        ite_bell_volume = bp->vol;
                        return (0);
                }
        default:
                return ((*wsdisplay_cdevsw.d_ioctl)(cn_tab->cn_dev, cmd,
                                                    addr, flag, l));
        }

        return (ENOTTY);
}

/*ARGSUSED*/
int
itepoll(dev_t dev, int events, struct lwp *l)
{
        return ite_initted ?
            (*wsdisplay_cdevsw.d_poll)(cn_tab->cn_dev, events, l) : (ENXIO);
}

int
itekqfilter(dev_t dev, struct knote *kn)
{
        return ite_initted ?
            (*wsdisplay_cdevsw.d_kqfilter)(cn_tab->cn_dev, kn) : (ENXIO);
}