/*      $OpenBSD: gecko.c,v 1.1 2008/04/27 14:39:51 kettenis Exp $      */

/*
 * Copyright (c) 2007 Mark Kettenis
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/systm.h>

#include <machine/autoconf.h>
#include <sys/bus.h>
#include <machine/cpu.h>
#include <machine/iomod.h>
#include <machine/pdc.h>

#include <hppa/dev/cpudevs.h>

struct gecko_softc {
        device_t                sc_dv;

        bus_space_tag_t         sc_iot;
        bus_space_handle_t      sc_ioh;
};

int     gecko_match(device_t, cfdata_t, void *);
void    gecko_attach(device_t, device_t, void *);
static device_t gecko_callback(device_t, struct confargs *);

CFATTACH_DECL_NEW(gecko, sizeof(struct gecko_softc), gecko_match,
    gecko_attach, NULL, NULL);

int
gecko_match(device_t parent, cfdata_t match, void *aux)
{
        struct confargs *ca = aux;

        if (ca->ca_type.iodc_type != HPPA_TYPE_BCPORT ||
            ca->ca_type.iodc_sv_model != HPPA_BCPORT_PORT)
                return (0);

        if (ca->ca_type.iodc_model == 0x50 &&
            ca->ca_type.iodc_revision == 0x00)
                return (1);

        return (0);
}

void
gecko_attach(device_t parent, device_t self, void *aux)
{
        struct gecko_softc *sc = device_private(self);
        struct confargs *ca = aux, nca;
        volatile struct iomod *regs;

        sc->sc_dv = self;
        sc->sc_iot = ca->ca_iot;
        if (bus_space_map(sc->sc_iot, ca->ca_hpa, IOMOD_HPASIZE, 0,
            &sc->sc_ioh)) {
                aprint_error(": can't map IO space\n");
                return;
        }
        regs = bus_space_vaddr(ca->ca_iot, sc->sc_ioh);

        aprint_verbose(": %x-%x", regs->io_io_low, regs->io_io_high);

        aprint_normal("\n");

        nca = *ca;
        nca.ca_hpabase = regs->io_io_low;
        nca.ca_nmodules = MAXMODBUS;

        pdc_scanbus(self, &nca, gecko_callback);
}

static device_t
gecko_callback(device_t self, struct confargs *ca)
{

        return config_round(self, ca, mbprint,
            CFARGS(.submatch = mbsubmatch));
}