1 /* $OpenBSD: central.c,v 1.12 2022/10/16 01:22:39 jsg Exp $ */
2
3 /*
4 * Copyright (c) 2004 Jason L. Wright (jason@thought.net)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/kernel.h>
32 #include <sys/device.h>
33 #include <sys/conf.h>
34 #include <sys/timeout.h>
35 #include <sys/malloc.h>
36
37 #include <machine/bus.h>
38 #include <machine/autoconf.h>
39 #include <machine/openfirm.h>
40
41 #include <sparc64/dev/centralvar.h>
42
43 struct central_softc {
44 struct device sc_dv;
45 bus_space_tag_t sc_bt;
46 bus_space_tag_t sc_cbt;
47 int sc_node;
48 int sc_nrange;
49 struct central_range *sc_range;
50 };
51
52 int central_match(struct device *, void *, void *);
53 void central_attach(struct device *, struct device *, void *);
54
55 int central_print(void *, const char *);
56 int central_get_string(int, char *, char **);
57
58 bus_space_tag_t central_alloc_bus_tag(struct central_softc *);
59 int _central_bus_map(bus_space_tag_t, bus_space_tag_t, bus_addr_t, bus_size_t,
60 int, bus_space_handle_t *);
61
62 int
central_match(struct device * parent,void * match,void * aux)63 central_match(struct device *parent, void *match, void *aux)
64 {
65 struct mainbus_attach_args *ma = aux;
66
67 if (strcmp(ma->ma_name, "central") == 0)
68 return (1);
69 return (0);
70 }
71
72 void
central_attach(struct device * parent,struct device * self,void * aux)73 central_attach(struct device *parent, struct device *self, void *aux)
74 {
75 struct central_softc *sc = (struct central_softc *)self;
76 struct mainbus_attach_args *ma = aux;
77 int node0, node;
78
79 sc->sc_bt = ma->ma_bustag;
80 sc->sc_node = ma->ma_node;
81 sc->sc_cbt = central_alloc_bus_tag(sc);
82
83 getprop(sc->sc_node, "ranges", sizeof(struct central_range),
84 &sc->sc_nrange, (void **)&sc->sc_range);
85
86 printf("\n");
87
88 node0 = firstchild(sc->sc_node);
89 for (node = node0; node; node = nextsibling(node)) {
90 struct central_attach_args ca;
91
92 bzero(&ca, sizeof(ca));
93 ca.ca_node = node;
94 ca.ca_bustag = sc->sc_cbt;
95 if (central_get_string(ca.ca_node, "name", &ca.ca_name)) {
96 printf("can't fetch name for node 0x%x\n", node);
97 continue;
98 }
99
100 getprop(node, "reg", sizeof(struct central_reg),
101 &ca.ca_nreg, (void **)&ca.ca_reg);
102
103 (void)config_found(&sc->sc_dv, (void *)&ca, central_print);
104
105 free(ca.ca_name, M_DEVBUF, 0);
106 }
107 }
108
109 int
central_get_string(int node,char * name,char ** buf)110 central_get_string(int node, char *name, char **buf)
111 {
112 int len;
113
114 len = getproplen(node, name);
115 if (len < 0)
116 return (len);
117 *buf = (char *)malloc(len + 1, M_DEVBUF, M_NOWAIT);
118 if (*buf == NULL)
119 return (-1);
120
121 if (len != 0)
122 getpropstringA(node, name, *buf);
123 (*buf)[len] = '\0';
124 return (0);
125 }
126
127 int
central_print(void * args,const char * busname)128 central_print(void *args, const char *busname)
129 {
130 struct central_attach_args *ca = args;
131 char *class;
132
133 if (busname != NULL) {
134 printf("\"%s\" at %s", ca->ca_name, busname);
135 class = getpropstring(ca->ca_node, "device_type");
136 if (*class != '\0')
137 printf(" class %s", class);
138 }
139 return (UNCONF);
140 }
141
142 bus_space_tag_t
central_alloc_bus_tag(struct central_softc * sc)143 central_alloc_bus_tag(struct central_softc *sc)
144 {
145 struct sparc_bus_space_tag *bt;
146
147 bt = malloc(sizeof(*bt), M_DEVBUF, M_NOWAIT | M_ZERO);
148 if (bt == NULL)
149 panic("central: couldn't alloc bus tag");
150
151 strlcpy(bt->name, sc->sc_dv.dv_xname, sizeof(bt->name));
152 bt->cookie = sc;
153 bt->parent = sc->sc_bt;
154 bt->asi = bt->parent->asi;
155 bt->sasi = bt->parent->sasi;
156 bt->sparc_bus_map = _central_bus_map;
157 /* XXX bt->sparc_bus_mmap = central_bus_mmap; */
158 /* XXX bt->sparc_intr_establish = upa_intr_establish; */
159 return (bt);
160 }
161
162 int
_central_bus_map(bus_space_tag_t t,bus_space_tag_t t0,bus_addr_t addr,bus_size_t size,int flags,bus_space_handle_t * hp)163 _central_bus_map(bus_space_tag_t t, bus_space_tag_t t0, bus_addr_t addr,
164 bus_size_t size, int flags, bus_space_handle_t *hp)
165 {
166 struct central_softc *sc = t->cookie;
167 int64_t slot = BUS_ADDR_IOSPACE(addr);
168 int64_t offset = BUS_ADDR_PADDR(addr);
169 int i;
170
171 if (t->parent == NULL || t->parent->sparc_bus_map == NULL) {
172 printf("\ncentral_bus_map: invalid parent");
173 return (EINVAL);
174 }
175
176 if (flags & BUS_SPACE_MAP_PROMADDRESS)
177 return ((*t->parent->sparc_bus_map)(t, t0, addr,
178 size, flags, hp));
179
180 for (i = 0; i < sc->sc_nrange; i++) {
181 bus_addr_t paddr;
182
183 if (sc->sc_range[i].cspace != slot)
184 continue;
185
186 paddr = offset - sc->sc_range[i].coffset;
187 paddr += sc->sc_range[i].poffset;
188 paddr |= ((bus_addr_t)sc->sc_range[i].pspace << 32);
189
190 return ((*t->parent->sparc_bus_map)(t->parent, t0, paddr,
191 size, flags, hp));
192 }
193
194 return (EINVAL);
195 }
196
197 const struct cfattach central_ca = {
198 sizeof(struct central_softc), central_match, central_attach
199 };
200
201 struct cfdriver central_cd = {
202 NULL, "central", DV_DULL
203 };
204