/* $OpenBSD: omap.c,v 1.24 2021/10/24 17:52:27 mpi Exp $ */
/*
 * Copyright (c) 2005,2008 Dale Rahn <drahn@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 <machine/bus.h>

#include <arm/mainbus/mainbus.h>
#include <armv7/armv7/armv7var.h>

#include <dev/ofw/fdt.h>

int     omap_match(struct device *, void *, void *);
void    omap3_init(void);
void    omap4_init(void);
void    am335x_init(void);

const struct cfattach omap_ca = {
        sizeof(struct armv7_softc), omap_match, armv7_attach
};

struct cfdriver omap_cd = {
        NULL, "omap", DV_DULL
};

struct board_dev omap3_dev[] = {
        { "prcm",       0 },
        { "gptimer",    0 },
        { "gptimer",    1 },
        { NULL,         0 }
};

struct board_dev am33xx_dev[] = {
        { "prcm",       0 },
        { "dmtimer",    0 },
        { "dmtimer",    1 },
        { NULL,         0 }
};

struct board_dev omap4_dev[] = {
        { "omapid",     0 },
        { "prcm",       0 },
        { NULL,         0 }
};

struct omap_soc {
        char                    *compatible;
        struct board_dev        *devs;
        void                    (*init)(void);
};

struct omap_soc omap_socs[] = {
        {
                "ti,omap3",
                omap3_dev,
                omap3_init,
        },
        {
                "ti,am33xx",
                am33xx_dev,
                am335x_init,
        },
        {
                "ti,omap4",
                omap4_dev,
                omap4_init,
        },
        { NULL, NULL, NULL },
};

struct board_dev *
omap_board_devs(void)
{
        void *node;
        int i;

        node = fdt_find_node("/");
        if (node == NULL)
                return NULL;

        for (i = 0; omap_socs[i].compatible != NULL; i++) {
                if (fdt_is_compatible(node, omap_socs[i].compatible))
                        return omap_socs[i].devs;
        }
        return NULL;
}

void
omap_board_init(void)
{
        void *node;
        int i;

        node = fdt_find_node("/");
        if (node == NULL)
                return;

        for (i = 0; omap_socs[i].compatible != NULL; i++) {
                if (fdt_is_compatible(node, omap_socs[i].compatible)) {
                        omap_socs[i].init();
                        break;
                }
        }
}

int
omap_match(struct device *parent, void *cfdata, void *aux)
{
        union mainbus_attach_args *ma = (union mainbus_attach_args *)aux;
        struct cfdata *cf = (struct cfdata *)cfdata;

        if (ma->ma_name == NULL)
                return (0);

        if (strcmp(cf->cf_driver->cd_name, ma->ma_name) != 0)
                return (0);

        return (omap_board_devs() != NULL);
}