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intio.c revision 1.18 
      1 /*	$NetBSD: intio.c,v 1.18 2023/02/04 14:38:09 tsutsui 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 1.18 2023/02/04 14:38:09 tsutsui Exp $");
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/device.h>
     42 #include <sys/reboot.h>
     43 
     44 #include <machine/autoconf.h>
     45 
     46 #include <next68k/dev/intiovar.h>
     47 
     48 int	intiomatch(device_t, cfdata_t, void *);
     49 void	intioattach(device_t, device_t, void *);
     50 int	intioprint(void *, const char *);
     51 int	intiosearch(device_t, cfdata_t, const int *, void *);
     52 
     53 CFATTACH_DECL_NEW(intio, 0,
     54     intiomatch, intioattach, NULL, NULL);
     55 
     56 static bool intio_attached;
     57 
     58 int
     59 intiomatch(device_t parent, cfdata_t match, void *aux)
     60 {
     61 	/* Allow only one instance. */
     62 	if (intio_attached)
     63 		return 0;
     64 
     65 	return 1;
     66 }
     67 
     68 void
     69 intioattach(device_t parent, device_t self, void *aux)
     70 {
     71 
     72 	printf("\n");
     73 
     74 	/* Search for and attach children. */
     75 	config_search(self, aux,
     76 	    CFARGS(.search = intiosearch));
     77 
     78 	intio_attached = true;
     79 }
     80 
     81 int
     82 intioprint(void *aux, const char *pnp)
     83 {
     84 	struct intio_attach_args *ia = aux;
     85 
     86 	if (ia->ia_addr)
     87 		aprint_normal(" addr %p", ia->ia_addr);
     88 
     89 	return UNCONF;
     90 }
     91 
     92 int
     93 intiosearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
     94 {
     95 	struct mainbus_attach_args *mba = aux;
     96 	struct intio_attach_args ia;
     97 
     98 	do {
     99 		ia.ia_addr = NULL;
    100 		ia.ia_bst = NEXT68K_INTIO_BUS_SPACE;
    101 		ia.ia_dmat = mba->mba_dmat;
    102 
    103 		if (!config_probe(parent, cf, &ia))
    104 			break;
    105 		config_attach(parent, cf, &ia, intioprint, CFARGS_NONE);
    106 	} while (cf->cf_fstate == FSTATE_STAR);
    107 
    108 	return 0;
    109 }
    110