1 /* $NetBSD: sgc.c,v 1.4 2021/08/07 16:18:53 thorpej Exp $ */
2 /* $OpenBSD: sgc.c,v 1.6 2010/04/15 20:35:21 miod Exp $ */
3
4 /*
5 * Copyright (c) 2005, Miodrag Vallat
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
30 /*
31 * SGC bus attachment and mapping glue.
32 */
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/device.h>
37 #include <sys/kernel.h>
38 #include <sys/bus.h>
39 #include <sys/cpu.h>
40
41 #include <machine/autoconf.h>
42 #include <machine/hp300spu.h>
43
44 #include <hp300/dev/sgcreg.h>
45 #include <hp300/dev/sgcvar.h>
46
47 #ifdef SGC_DEBUG
48 #define DPRINTF(x) printf x
49 #else
50 #define DPRINTF(x) do {} while (/* CONSTCOND */ 0)
51 #endif
52
53 struct sgc_softc {
54 device_t sc_dev;
55 struct bus_space_tag sc_tag;
56 };
57
58 static int sgcmatch(device_t, cfdata_t, void *);
59 static void sgcattach(device_t, device_t, void *);
60 static int sgcprint(void *, const char *);
61
62 CFATTACH_DECL_NEW(sgc, sizeof(struct sgc_softc),
63 sgcmatch, sgcattach, NULL, NULL);
64
65 int
sgcmatch(device_t parent,cfdata_t cf,void * aux)66 sgcmatch(device_t parent, cfdata_t cf, void *aux)
67 {
68 static int sgc_matched = 0;
69
70 /* Allow only one instance. */
71 if (sgc_matched)
72 return 0;
73
74 /*
75 * Leave out machines which can not have an SGC bus.
76 */
77
78 switch (machineid) {
79 #if 0
80 case HP_362:
81 case HP_382:
82 #endif
83 case HP_400:
84 case HP_425:
85 case HP_433:
86 return sgc_matched = 1;
87 default:
88 return 0;
89 }
90 }
91
92 void
sgcattach(device_t parent,device_t self,void * aux)93 sgcattach(device_t parent, device_t self, void *aux)
94 {
95 struct sgc_softc *sc;
96 struct sgc_attach_args saa;
97 paddr_t pa;
98 void *va;
99 int slot, rv;
100 bus_space_tag_t bst;
101 bus_space_handle_t bsh;
102
103 sc = device_private(self);
104 sc->sc_dev = self;
105 aprint_normal("\n");
106
107 bst = &sc->sc_tag;
108 memset(bst, 0, sizeof(struct bus_space_tag));
109 bst->bustype = HP300_BUS_SPACE_SGC;
110
111 for (slot = 0; slot < SGC_NSLOTS; slot++) {
112 pa = sgc_slottopa(slot);
113 if (bus_space_map(bst, pa, PAGE_SIZE, 0, &bsh) != 0) {
114 aprint_error_dev(self, "can't map slot %d\n", slot);
115 continue;
116 }
117 va = bus_space_vaddr(bst, bsh);
118
119 /* Check for hardware. */
120 rv = badaddr(va);
121 bus_space_unmap(bst, bsh, PAGE_SIZE);
122
123 if (rv != 0) {
124 DPRINTF(("%s: no valid device at slot %d\n",
125 device_xname(self), slot));
126 continue;
127 }
128
129 memset(&saa, 0, sizeof(saa));
130 saa.saa_iot = bst;
131 saa.saa_slot = slot;
132
133 /* Attach matching device. */
134 config_found(self, &saa, sgcprint, CFARGS_NONE);
135 }
136 }
137
138 int
sgcprint(void * aux,const char * pnp)139 sgcprint(void *aux, const char *pnp)
140 {
141 struct sgc_attach_args *saa = aux;
142
143 if (pnp)
144 aprint_normal("unknown SGC card at %s", pnp);
145 aprint_normal(" slot %d", saa->saa_slot);
146 return UNCONF;
147 }
148
149 /*
150 * Convert a slot number to a system physical address.
151 * This is needed for bus_space.
152 */
153 paddr_t
sgc_slottopa(int slot)154 sgc_slottopa(int slot)
155 {
156 paddr_t rval;
157
158 if (slot < 0 || slot >= SGC_NSLOTS)
159 rval = 0;
160 else
161 rval = SGC_BASE + (slot * SGC_DEVSIZE);
162
163 return rval;
164 }
165