ppb.c revision 1.9 1 1.9 cgd /* $NetBSD: ppb.c,v 1.9 1996/08/27 21:59:53 cgd Exp $ */
2 1.1 cgd
3 1.1 cgd /*
4 1.1 cgd * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
5 1.1 cgd *
6 1.1 cgd * Redistribution and use in source and binary forms, with or without
7 1.1 cgd * modification, are permitted provided that the following conditions
8 1.1 cgd * are met:
9 1.1 cgd * 1. Redistributions of source code must retain the above copyright
10 1.1 cgd * notice, this list of conditions and the following disclaimer.
11 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright
12 1.1 cgd * notice, this list of conditions and the following disclaimer in the
13 1.1 cgd * documentation and/or other materials provided with the distribution.
14 1.1 cgd * 3. All advertising materials mentioning features or use of this software
15 1.1 cgd * must display the following acknowledgement:
16 1.1 cgd * This product includes software developed by Christopher G. Demetriou
17 1.1 cgd * for the NetBSD Project.
18 1.1 cgd * 4. The name of the author may not be used to endorse or promote products
19 1.1 cgd * derived from this software without specific prior written permission
20 1.1 cgd *
21 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 1.1 cgd * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 1.1 cgd * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 1.1 cgd * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 1.1 cgd * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 1.1 cgd * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 1.1 cgd * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 1.1 cgd * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 1.1 cgd * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 1.1 cgd * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 1.1 cgd */
32 1.1 cgd
33 1.1 cgd /*
34 1.1 cgd * XXX NOTE:
35 1.1 cgd * XXX PROPER OPERATION OF DEVICES BEHIND PPB'S WHICH USE INTERRUPTS
36 1.1 cgd * XXX ON SYSTEMS OTHER THAN THE i386 IS NOT POSSIBLE AT THIS TIME.
37 1.1 cgd * XXX There needs to be some support for 'swizzling' the interrupt
38 1.1 cgd * XXX pin. In general, pci_map_int() has to have a different
39 1.1 cgd * XXX interface.
40 1.1 cgd */
41 1.1 cgd
42 1.1 cgd #include <sys/param.h>
43 1.1 cgd #include <sys/systm.h>
44 1.1 cgd #include <sys/kernel.h>
45 1.1 cgd #include <sys/device.h>
46 1.1 cgd
47 1.1 cgd #include <dev/pci/pcireg.h>
48 1.1 cgd #include <dev/pci/pcivar.h>
49 1.1 cgd #include <dev/pci/pcidevs.h>
50 1.1 cgd #include <dev/pci/ppbreg.h>
51 1.1 cgd
52 1.1 cgd int ppbmatch __P((struct device *, void *, void *));
53 1.1 cgd void ppbattach __P((struct device *, struct device *, void *));
54 1.1 cgd
55 1.5 thorpej struct cfattach ppb_ca = {
56 1.5 thorpej sizeof(struct device), ppbmatch, ppbattach
57 1.5 thorpej };
58 1.5 thorpej
59 1.5 thorpej struct cfdriver ppb_cd = {
60 1.5 thorpej NULL, "ppb", DV_DULL
61 1.1 cgd };
62 1.1 cgd
63 1.9 cgd int ppbprint __P((void *, const char *pnp));
64 1.1 cgd
65 1.1 cgd int
66 1.1 cgd ppbmatch(parent, match, aux)
67 1.1 cgd struct device *parent;
68 1.1 cgd void *match, *aux;
69 1.1 cgd {
70 1.1 cgd struct pci_attach_args *pa = aux;
71 1.1 cgd
72 1.1 cgd /*
73 1.1 cgd * Check the ID register to see that it's a PCI bridge.
74 1.1 cgd * If it is, we assume that we can deal with it; it _should_
75 1.1 cgd * work in a standardized way...
76 1.1 cgd */
77 1.1 cgd if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
78 1.1 cgd PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI)
79 1.1 cgd return (1);
80 1.1 cgd
81 1.1 cgd return (0);
82 1.1 cgd }
83 1.1 cgd
84 1.1 cgd void
85 1.1 cgd ppbattach(parent, self, aux)
86 1.1 cgd struct device *parent, *self;
87 1.1 cgd void *aux;
88 1.1 cgd {
89 1.1 cgd struct pci_attach_args *pa = aux;
90 1.7 cgd pci_chipset_tag_t pc = pa->pa_pc;
91 1.1 cgd struct pcibus_attach_args pba;
92 1.7 cgd pcireg_t busdata;
93 1.1 cgd char devinfo[256];
94 1.1 cgd
95 1.1 cgd pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
96 1.1 cgd printf(": %s (rev. 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class));
97 1.1 cgd
98 1.7 cgd busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO);
99 1.1 cgd
100 1.7 cgd if (PPB_BUSINFO_SECONDARY(busdata) == 0) {
101 1.1 cgd printf("%s: not configured by system firmware\n",
102 1.1 cgd self->dv_xname);
103 1.1 cgd return;
104 1.1 cgd }
105 1.1 cgd
106 1.1 cgd #if 0
107 1.1 cgd /*
108 1.1 cgd * XXX can't do this, because we're not given our bus number
109 1.7 cgd * (we shouldn't need it), and because we've no way to
110 1.7 cgd * decompose our tag.
111 1.1 cgd */
112 1.1 cgd /* sanity check. */
113 1.7 cgd if (pa->pa_bus != PPB_BUSINFO_PRIMARY(busdata))
114 1.1 cgd panic("ppbattach: bus in tag (%d) != bus in reg (%d)",
115 1.7 cgd pa->pa_bus, PPB_BUSINFO_PRIMARY(busdata));
116 1.1 cgd #endif
117 1.1 cgd
118 1.1 cgd /*
119 1.1 cgd * Attach the PCI bus than hangs off of it.
120 1.1 cgd */
121 1.1 cgd pba.pba_busname = "pci";
122 1.7 cgd pba.pba_bc = pa->pa_bc;
123 1.7 cgd pba.pba_pc = pc;
124 1.7 cgd pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata);
125 1.7 cgd pba.pba_intrswiz = pa->pa_intrswiz;
126 1.7 cgd pba.pba_intrtag = pa->pa_intrtag;
127 1.1 cgd
128 1.2 cgd config_found(self, &pba, ppbprint);
129 1.1 cgd }
130 1.1 cgd
131 1.7 cgd int
132 1.1 cgd ppbprint(aux, pnp)
133 1.1 cgd void *aux;
134 1.9 cgd const char *pnp;
135 1.1 cgd {
136 1.1 cgd struct pcibus_attach_args *pba = aux;
137 1.1 cgd
138 1.1 cgd /* only PCIs can attach to PPBs; easy. */
139 1.1 cgd if (pnp)
140 1.1 cgd printf("pci at %s", pnp);
141 1.1 cgd printf(" bus %d", pba->pba_bus);
142 1.6 cgd return (UNCONF);
143 1.1 cgd }
144