/*      $NetBSD: intio.c,v 1.33 2024/04/30 05:06:08 tsutsui Exp $       */

/*-
 * Copyright (c) 1996, 1998, 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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.
 */

/*
 * Autoconfiguration support for hp300 internal i/o space.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: intio.c,v 1.33 2024/04/30 05:06:08 tsutsui Exp $");

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

#include <machine/hp300spu.h>

#include <hp300/dev/intioreg.h>
#include <hp300/dev/intiovar.h>

struct intio_softc {
        device_t sc_dev;
        struct bus_space_tag sc_tag;
};

static int      intiomatch(device_t, cfdata_t, void *);
static void     intioattach(device_t, device_t, void *);
static int      intioprint(void *, const char *);

CFATTACH_DECL_NEW(intio, sizeof(struct intio_softc),
    intiomatch, intioattach, NULL, NULL);

#if defined(HP320) || defined(HP330) || defined(HP340) || defined(HP345) || \
    defined(HP350) || defined(HP360) || defined(HP370) || defined(HP375) || \
    defined(HP380) || defined(HP385)
#define HAVE_INTIO_FB
#endif

#if defined(HP382) || defined(HP400) || defined(HP425) || defined(HP433)
#define HAVE_INTIO_FRODO
#endif

#define INTIO_3xx_BUILTINS                                              \
        (__BIT(HP_320) | __BIT(HP_330) | __BIT(HP_340) |                \
         __BIT(HP_345) | __BIT(HP_345) | __BIT(HP_350) |                \
         __BIT(HP_360) | __BIT(HP_370) | __BIT(HP_375) |                \
         __BIT(HP_380) | __BIT(HP_385))

#define INTIO_362_BUILTINS      __BIT(HP_362)
#define INTIO_382_BUILTINS      __BIT(HP_382)

#define INTIO_4xx_BUILTINS                                              \
        (__BIT(HP_400) | __BIT(HP_425) | __BIT(HP_433))

#define INTIO_ALL_BUILTINS                                              \
        (INTIO_3xx_BUILTINS | INTIO_362_BUILTINS |                      \
         INTIO_382_BUILTINS | INTIO_4xx_BUILTINS)

static const struct intio_builtins intio_builtins[] = {
        { "rtc",        RTC_BASE,       -1,
          INTIO_ALL_BUILTINS },

#ifdef HAVE_INTIO_FRODO
        { "frodo",      FRODO_BASE,     5,
          INTIO_382_BUILTINS | INTIO_4xx_BUILTINS },
#endif

        { "hil",        HIL_BASE,       1,
          INTIO_ALL_BUILTINS },

        { "hpib",       HPIB_BASE,      3,
          INTIO_ALL_BUILTINS },

        { "dma",        DMA_BASE,       1,
          INTIO_ALL_BUILTINS },

#ifdef HAVE_INTIO_FB
        { "fb",         FB_BASE,        -1,
          INTIO_3xx_BUILTINS },
#endif
};
#define nintio_builtins         __arraycount(intio_builtins)

static int intio_matched = 0;
extern void *internalhpib;

static int
intiomatch(device_t parent, cfdata_t cf, void *aux)
{

        /* Allow only one instance. */
        if (intio_matched)
                return 0;

        intio_matched = 1;
        return 1;
}

static void
intioattach(device_t parent, device_t self, void *aux)
{
        struct intio_softc *sc = device_private(self);
        struct intio_attach_args ia;
        bus_space_tag_t bst = &sc->sc_tag;
        const uint32_t spumask = 1U << machineid;
        int i;

        sc->sc_dev = self;
        aprint_normal("\n");

        KASSERT(spumask != 0);

        memset(bst, 0, sizeof(struct bus_space_tag));
        bst->bustype = HP300_BUS_SPACE_INTIO;

        memset(&ia, 0, sizeof(ia));

        for (i = 0; i < nintio_builtins; i++) {

                /*
                 * If the device doesn't exist on this specific model,
                 * skip it.
                 */
                if ((intio_builtins[i].ib_spumask & spumask) == 0)
                        continue;

                /*
                 * Internal HP-IB doesn't always return a device ID,
                 * so we rely on the sysflags.
                 */
                if (intio_builtins[i].ib_offset == HPIB_BASE && !internalhpib)
                        continue;

                strlcpy(ia.ia_modname, intio_builtins[i].ib_modname,
                    sizeof(ia.ia_modname));
                ia.ia_bst = bst;
                ia.ia_iobase = intio_builtins[i].ib_offset;
                ia.ia_addr =
                    (bus_addr_t)(intiobase + intio_builtins[i].ib_offset);
                ia.ia_ipl = intio_builtins[i].ib_ipl;
                config_found(self, &ia, intioprint, CFARGS_NONE);
        }
}

static int
intioprint(void *aux, const char *pnp)
{
        struct intio_attach_args *ia = aux;

        if (pnp != NULL)
                aprint_normal("%s at %s", ia->ia_modname, pnp);
        if (ia->ia_iobase != 0 && pnp == NULL) {
                aprint_normal(" addr 0x%lx", INTIOBASE + ia->ia_iobase);
                if (ia->ia_ipl != -1)
                        aprint_normal(" ipl %d", ia->ia_ipl);
        }
        return UNCONF;
}