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