/*      $OpenBSD: sxisyscon.c,v 1.3 2024/02/07 22:00:38 uaa Exp $       */
/*
 * Copyright (c) 2019 Mark Kettenis <kettenis@openbsd.org>
 *
 * 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/systm.h>
#include <sys/device.h>

#include <machine/bus.h>
#include <machine/fdt.h>

#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/ofw/fdt.h>

struct sxisyscon_softc {
        struct device           sc_dev;
        bus_space_tag_t         sc_iot;
        bus_space_handle_t      sc_ioh;
};

int     sxisyscon_match(struct device *, void *, void *);
void    sxisyscon_attach(struct device *, struct device *, void *);

const struct cfattach sxisyscon_ca = {
        sizeof(struct sxisyscon_softc), sxisyscon_match, sxisyscon_attach
};

struct cfdriver sxisyscon_cd = {
        NULL, "sxisyscon", DV_DULL
};

int
sxisyscon_match(struct device *parent, void *match, void *aux)
{
        struct fdt_attach_args *faa = aux;
        int node = faa->fa_node;

        if (OF_is_compatible(node, "allwinner,sun8i-h3-system-control") ||
            OF_is_compatible(node, "allwinner,sun50i-a64-system-control") ||
            OF_is_compatible(node, "allwinner,sun50i-h5-system-control") ||
            OF_is_compatible(node, "allwinner,sun50i-h6-system-control") ||
            OF_is_compatible(node, "allwinner,sun50i-h616-system-control"))
                return 10;      /* Must beat syscon(4). */

        return 0;
}

void
sxisyscon_attach(struct device *parent, struct device *self, void *aux)
{
        struct sxisyscon_softc *sc = (struct sxisyscon_softc *)self;
        struct fdt_attach_args *faa = aux;

        if (faa->fa_nreg < 1) {
                printf(": no registers\n");
                return;
        }

        sc->sc_iot = faa->fa_iot;
        if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
            faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
                printf(": can't map registers\n");
                return;
        }

        regmap_register(faa->fa_node, sc->sc_iot, sc->sc_ioh,
            faa->fa_reg[0].size);

        printf("\n");
}