1 /* $NetBSD: pcmb.c,v 1.22 2021/08/07 16:18:55 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1996, 1998 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 and Jaromir Dolecek.
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 * "Driver" for PCI-MCA Bridges.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: pcmb.c,v 1.22 2021/08/07 16:18:55 thorpej Exp $");
38
39 #include <sys/types.h>
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/device.h>
43 #include <sys/bus.h>
44
45 #include <dev/mca/mcavar.h>
46
47 #include <dev/pci/pcivar.h>
48 #include <dev/pci/pcireg.h>
49
50 #include <dev/pci/pcidevs.h>
51
52 #include "mca.h"
53
54 int pcmbmatch(device_t, cfdata_t, void *);
55 void pcmbattach(device_t, device_t, void *);
56
57 CFATTACH_DECL_NEW(pcmb, 0, pcmbmatch, pcmbattach, NULL, NULL);
58
59 void pcmb_callback(device_t);
60
61 int
pcmbmatch(device_t parent,cfdata_t match,void * aux)62 pcmbmatch(device_t parent, cfdata_t match, void *aux)
63 {
64 struct pci_attach_args *pa = aux;
65
66 /*
67 * Match anything which claims to be PCI-MCA bridge.
68 */
69 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE
70 && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_MC)
71 return (1);
72
73 return (0);
74 }
75
76 void
pcmbattach(device_t parent,device_t self,void * aux)77 pcmbattach(device_t parent, device_t self, void *aux)
78 {
79 struct pci_attach_args *pa = aux;
80 char devinfo[256];
81
82 aprint_naive("\n");
83 aprint_normal("\n");
84
85 /*
86 * Just print out a description and defer configuration
87 * until all PCI devices have been attached.
88 */
89 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
90 aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo,
91 PCI_REVISION(pa->pa_class));
92
93 config_defer(self, pcmb_callback);
94 }
95
96 void
pcmb_callback(device_t self)97 pcmb_callback(device_t self)
98 {
99 struct mcabus_attach_args ma;
100
101 /*
102 * Attach MCA bus behind this bridge.
103 */
104 ma.mba_iot = x86_bus_space_io;
105 ma.mba_memt = x86_bus_space_mem;
106 #if NMCA > 0
107 ma.mba_dmat = &mca_bus_dma_tag;
108 #endif
109 ma.mba_mc = NULL;
110 ma.mba_bus = 0;
111 config_found(self, &ma, mcabusprint, CFARGS_NONE);
112 }
113