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
49int	intiomatch(device_t, cfdata_t, void *);
50void	intioattach(device_t, device_t, void *);
51int	intioprint(void *, const char *);
52int	intiosearch(device_t, cfdata_t, const int *, void *);
53
54CFATTACH_DECL_NEW(intio, 0,
55    intiomatch, intioattach, NULL, NULL);
56
57static bool intio_attached;
58
59int
60intiomatch(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
69void
70intioattach(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
82int
83intioprint(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
93int
94intiosearch(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
112int
113bus_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
125paddr_t
126bus_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