/*      $OpenBSD: com_gsc.c,v 1.23 2025/06/28 13:24:21 miod Exp $       */

/*
 * Copyright (c) 1998-2003 Michael Shalayeff
 * 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 ``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 HIS RELATIVES 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 MIND, 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/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/tty.h>

#include <machine/bus.h>
#include <machine/intr.h>
#include <machine/iomod.h>
#include <machine/autoconf.h>

#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>

#include <hppa/dev/cpudevs.h>
#include <hppa/gsc/gscbusvar.h>

#define COM_GSC_FREQ    7372800

struct com_gsc_regs {
        u_int8_t reset;
};

int     com_gsc_probe(struct device *, void *, void *);
void    com_gsc_attach(struct device *, struct device *, void *);

const struct cfattach com_gsc_ca = {
        sizeof(struct com_softc), com_gsc_probe, com_gsc_attach
};

int
com_gsc_probe(struct device *parent, void *match, void *aux)
{
        struct gsc_attach_args *ga = aux;

        if (ga->ga_type.iodc_type != HPPA_TYPE_FIO ||
            (ga->ga_type.iodc_sv_model != HPPA_FIO_GRS232 &&
             ga->ga_type.iodc_sv_model != HPPA_FIO_RS232 &&
             ga->ga_type.iodc_sv_model != HPPA_FIO_GRJ16))
                return (0);

        return (1);
        /* HOZER comprobe1(ga->ga_iot, ga->ga_hpa + IOMOD_DEVOFFSET); */
}

void
com_gsc_attach(struct device *parent, struct device *self, void *aux)
{
        struct com_softc *sc = (void *)self;
        struct gsc_attach_args *ga = aux;

        sc->sc_iot = ga->ga_iot;
        sc->sc_iobase = (bus_addr_t)ga->ga_hpa;
        if (ga->ga_type.iodc_sv_model != HPPA_FIO_GRJ16)
                sc->sc_iobase += IOMOD_DEVOFFSET;

        if (bus_space_map(sc->sc_iot, sc->sc_iobase, COM_NPORTS,
            0, &sc->sc_ioh)) {
                printf(": cannot map io space\n");
                return;
        }

        if (PAGE0->mem_cons.pz_class == PCL_DUPLEX &&
            PAGE0->mem_cons.pz_hpa == ga->ga_hpa) {
                bus_space_unmap(sc->sc_iot, sc->sc_ioh, COM_NPORTS);
                comcnattach(sc->sc_iot, sc->sc_iobase, comdefaultrate,
                    COM_GSC_FREQ, comconscflag);
        }

        sc->sc_frequency = COM_GSC_FREQ;
        com_attach_subr(sc);

        sc->sc_ih = gsc_intr_establish((struct gsc_softc *)parent,
            ga->ga_irq, IPL_TTY, comintr, sc, sc->sc_dev.dv_xname);
}