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
intiomatch(device_t parent,cfdata_t match,void * aux)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
intioattach(device_t parent,device_t self,void * aux)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
intioprint(void * aux,const char * pnp)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
intiosearch(device_t parent,cfdata_t cf,const int * ldesc,void * aux)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
bus_space_map(bus_space_tag_t bst,bus_addr_t addr,bus_size_t size,int flags,bus_space_handle_t * bsh)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
bus_space_mmap(bus_space_tag_t bst,bus_addr_t addr,off_t offset,int prot,int flags)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