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      1 /*	$NetBSD: intio.c,v 1.19 2023/02/11 02:31:34 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 1.19 2023/02/11 02:31:34 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 #include <machine/cpu.h>
     46 
     47 #include <next68k/dev/intiovar.h>
     48 
     49 int	intiomatch(device_t, cfdata_t, void *);
     50 void	intioattach(device_t, device_t, void *);
     51 int	intioprint(void *, const char *);
     52 int	intiosearch(device_t, cfdata_t, const int *, void *);
     53 
     54 CFATTACH_DECL_NEW(intio, 0,
     55     intiomatch, intioattach, NULL, NULL);
     56 
     57 static bool intio_attached;
     58 
     59 int
     60 intiomatch(device_t parent, cfdata_t match, void *aux)
     61 {
     62 	/* Allow only one instance. */
     63 	if (intio_attached)
     64 		return 0;
     65 
     66 	return 1;
     67 }
     68 
     69 void
     70 intioattach(device_t parent, device_t self, void *aux)
     71 {
     72 
     73 	printf("\n");
     74 
     75 	/* Search for and attach children. */
     76 	config_search(self, aux,
     77 	    CFARGS(.search = intiosearch));
     78 
     79 	intio_attached = true;
     80 }
     81 
     82 int
     83 intioprint(void *aux, const char *pnp)
     84 {
     85 	struct intio_attach_args *ia = aux;
     86 
     87 	if (ia->ia_addr)
     88 		aprint_normal(" addr %p", ia->ia_addr);
     89 
     90 	return UNCONF;
     91 }
     92 
     93 int
     94 intiosearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
     95 {
     96 	struct mainbus_attach_args *mba = aux;
     97 	struct intio_attach_args ia;
     98 
     99 	do {
    100 		ia.ia_addr = NULL;
    101 		ia.ia_bst = NEXT68K_INTIO_BUS_SPACE;
    102 		ia.ia_dmat = mba->mba_dmat;
    103 
    104 		if (!config_probe(parent, cf, &ia))
    105 			break;
    106 		config_attach(parent, cf, &ia, intioprint, CFARGS_NONE);
    107 	} while (cf->cf_fstate == FSTATE_STAR);
    108 
    109 	return 0;
    110 }
    111 
    112 int
    113 bus_space_map(bus_space_tag_t bst, bus_addr_t addr, bus_size_t size,
    114     int flags, bus_space_handle_t *bsh)
    115 {
    116 
    117 	if (addr >= INTIOBASE && (addr + size) < INTIOTOP) {
    118 		*bsh = IIOV(addr);
    119 		return 0;
    120 	}
    121 
    122 	return EINVAL;
    123 }
    124 
    125 paddr_t
    126 bus_space_mmap(bus_space_tag_t bst, bus_addr_t addr, off_t offset, int prot,
    127     int flags)
    128 {
    129 
    130 	if (addr >= INTIOBASE && (addr + offset) < INTIOTOP)
    131 		return m68k_btop(addr + offset);
    132 
    133 	return -1;
    134 }
    135