/*      $NetBSD: gpio.c,v 1.17 2023/12/20 15:29:04 thorpej Exp $        */

/*-
 * Copyright (C) 1998   Internet Research Institute, Inc.
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by
 *      Internet Research Institute, Inc.
 * 4. 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: gpio.c,v 1.17 2023/12/20 15:29:04 thorpej Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/pio.h>

#include <dev/ofw/openfirm.h>

#include "adb.h"

static void gpio_obio_attach (device_t, device_t, void *);
static int gpio_obio_match (device_t, cfdata_t, void *);
static int gpio_obio_print (void *aux, const char *gpio);

static void gpio_gpio_attach (device_t, device_t, void *);
static int gpio_gpio_match (device_t, cfdata_t, void *);
static int gpio_intr (void *);

struct gpio_softc {
        u_int8_t *sc_port;
};

CFATTACH_DECL_NEW(gpio_obio, sizeof(struct gpio_softc),
    gpio_obio_match, gpio_obio_attach, NULL, NULL);

CFATTACH_DECL_NEW(gpio_gpio, sizeof(struct gpio_softc),
    gpio_gpio_match, gpio_gpio_attach, NULL, NULL);

extern struct cfdriver gpio_cd;

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

        if (strcmp(ca->ca_name, "gpio") != 0)
                return 0;

        if (ca->ca_nreg == 0)
                return 0;

        return 1;
}

void
gpio_obio_attach(device_t parent, device_t self, void *aux)
{
        struct gpio_softc *sc = device_private(self);
        struct confargs *ca = aux, ca2;
        int child;
        int namelen;
        int intr[6];
        u_int reg[20];
        char name[32];

        printf("\n");

        sc->sc_port = mapiodev(ca->ca_baseaddr + ca->ca_reg[0], ca->ca_reg[1],
            false);

        devhandle_t selfh = device_handle(self);
        ca2.ca_baseaddr = ca->ca_baseaddr;
        for (child = OF_child(ca->ca_node); child; child = OF_peer(child)) {
                namelen = OF_getprop(child, "name", name, sizeof(name));
                if (namelen < 0)
                        continue;
                if (namelen >= sizeof(name))
                        continue;

                name[namelen] = 0;
                ca2.ca_name = name;
                ca2.ca_node = child;

                ca2.ca_nreg  = OF_getprop(child, "reg", reg, sizeof(reg));
                ca2.ca_nintr = OF_getprop(child, "AAPL,interrupts", intr,
                                sizeof(intr));
                if (ca2.ca_nintr == -1)
                        ca2.ca_nintr = OF_getprop(child, "interrupts", intr,
                                        sizeof(intr));

                ca2.ca_reg = reg;
                ca2.ca_intr = intr;

                config_found(self, &ca2, gpio_obio_print,
                    CFARGS(.devhandle = devhandle_from_of(selfh, child)));
        }
}

int
gpio_obio_print(void *aux, const char *gpio)
{
        struct confargs *ca = aux;

        if (gpio)
                aprint_normal("%s at %s", ca->ca_name, gpio);

        if (ca->ca_nreg > 0)
                aprint_normal(" offset 0x%x", ca->ca_reg[0]);

        return UNCONF;
}

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

        if (strcmp(ca->ca_name, "extint-gpio1") != 0)
                return 0;

        if (ca->ca_nintr < 0)
                return 0;

        return 1;
}

void
gpio_gpio_attach(device_t parent, device_t self, void *aux)
{
        struct gpio_softc *sc = device_private(self);
        struct confargs *ca = aux;


        sc->sc_port = device_private(parent)->sc_port;
        intr_establish_xname(ca->ca_intr[0], IST_LEVEL, IPL_HIGH, gpio_intr, sc,
            device_xname(self));

        printf(" irq %d\n", ca->ca_intr[0]);
}

#if NADB > 0
extern int adb_intr (void *);
extern struct cfdriver adb_cd;
#endif

int
gpio_intr(void *arg)
{
        int rv = 0;

#if NADB > 0
        struct gpio_softc *sc;

        sc = device_lookup_private(&adb_cd, 0);
        if (sc != NULL)
                rv = adb_intr(sc);
#endif

        return rv;
}