Home | History | Annotate | Line # | Download | only in dev 
      1 /*	$NetBSD: intio.c,v 1.20 2026/04/26 15:12:59 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Autoconfiguration support for next68k internal i/o space.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: intio.c,v 1.20 2026/04/26 15:12:59 thorpej Exp $");
     38 
     39 #define	_M68K_BUS_SPACE_PRIVATE
     40 
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <sys/device.h>
     44 #include <sys/reboot.h>
     45 
     46 #include <machine/autoconf.h>
     47 #include <machine/cpu.h>
     48 
     49 #include <next68k/dev/intiovar.h>
     50 
     51 int	intiomatch(device_t, cfdata_t, void *);
     52 void	intioattach(device_t, device_t, void *);
     53 int	intioprint(void *, const char *);
     54 int	intiosearch(device_t, cfdata_t, const int *, void *);
     55 
     56 CFATTACH_DECL_NEW(intio, 0,
     57     intiomatch, intioattach, NULL, NULL);
     58 
     59 static bool intio_attached;
     60 
     61 int
     62 intiomatch(device_t parent, cfdata_t match, void *aux)
     63 {
     64 	/* Allow only one instance. */
     65 	if (intio_attached)
     66 		return 0;
     67 
     68 	return 1;
     69 }
     70 
     71 void
     72 intioattach(device_t parent, device_t self, void *aux)
     73 {
     74 
     75 	printf("\n");
     76 
     77 	/* Search for and attach children. */
     78 	config_search(self, aux,
     79 	    CFARGS(.search = intiosearch));
     80 
     81 	intio_attached = true;
     82 }
     83 
     84 int
     85 intioprint(void *aux, const char *pnp)
     86 {
     87 	struct intio_attach_args *ia = aux;
     88 
     89 	if (ia->ia_addr)
     90 		aprint_normal(" addr %p", ia->ia_addr);
     91 
     92 	return UNCONF;
     93 }
     94 
     95 int
     96 intiosearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
     97 {
     98 	struct mainbus_attach_args *mba = aux;
     99 	struct intio_attach_args ia;
    100 
    101 	do {
    102 		ia.ia_addr = NULL;
    103 		ia.ia_bst = &m68k_simple_bus_space;
    104 		ia.ia_dmat = mba->mba_dmat;
    105 
    106 		if (!config_probe(parent, cf, &ia))
    107 			break;
    108 		config_attach(parent, cf, &ia, intioprint, CFARGS_NONE);
    109 	} while (cf->cf_fstate == FSTATE_STAR);
    110 
    111 	return 0;
    112 }
    113