/*      $NetBSD: intio.c,v 1.19 2023/02/11 02:31:34 tsutsui Exp $       */

/*-
* Copyright (c) 1996 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 next68k internal i/o space.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: intio.c,v 1.19 2023/02/11 02:31:34 tsutsui Exp $");

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

#include <machine/autoconf.h>
#include <machine/cpu.h>

#include <next68k/dev/intiovar.h>

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

CFATTACH_DECL_NEW(intio, 0,
   intiomatch, intioattach, NULL, NULL);

static bool intio_attached;

int
intiomatch(device_t parent, cfdata_t match, void *aux)
{
       /* Allow only one instance. */
       if (intio_attached)
               return 0;

       return 1;
}

void
intioattach(device_t parent, device_t self, void *aux)
{

       printf("\n");

       /* Search for and attach children. */
       config_search(self, aux,
           CFARGS(.search = intiosearch));

       intio_attached = true;
}

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

       if (ia->ia_addr)
               aprint_normal(" addr %p", ia->ia_addr);

       return UNCONF;
}

int
intiosearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
       struct mainbus_attach_args *mba = aux;
       struct intio_attach_args ia;

       do {
               ia.ia_addr = NULL;
               ia.ia_bst = NEXT68K_INTIO_BUS_SPACE;
               ia.ia_dmat = mba->mba_dmat;

               if (!config_probe(parent, cf, &ia))
                       break;
               config_attach(parent, cf, &ia, intioprint, CFARGS_NONE);
       } while (cf->cf_fstate == FSTATE_STAR);

       return 0;
}

int
bus_space_map(bus_space_tag_t bst, bus_addr_t addr, bus_size_t size,
   int flags, bus_space_handle_t *bsh)
{

       if (addr >= INTIOBASE && (addr + size) < INTIOTOP) {
               *bsh = IIOV(addr);
               return 0;
       }

       return EINVAL;
}

paddr_t
bus_space_mmap(bus_space_tag_t bst, bus_addr_t addr, off_t offset, int prot,
   int flags)
{

       if (addr >= INTIOBASE && (addr + offset) < INTIOTOP)
               return m68k_btop(addr + offset);

       return -1;
}