pcmb.c revision 1.16 
1/*	$NetBSD: pcmb.c,v 1.16 2008/04/04 22:48:58 cegger 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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39/*
40 * "Driver" for PCI-MCA Bridges.
41 */
42
43#include <sys/cdefs.h>
44__KERNEL_RCSID(0, "$NetBSD: pcmb.c,v 1.16 2008/04/04 22:48:58 cegger Exp $");
45
46#include <sys/types.h>
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/device.h>
50
51#include <machine/bus.h>
52
53#include <dev/mca/mcavar.h>
54
55#include <dev/pci/pcivar.h>
56#include <dev/pci/pcireg.h>
57
58#include <dev/pci/pcidevs.h>
59
60#include "mca.h"
61
62int	pcmbmatch(struct device *, struct cfdata *, void *);
63void	pcmbattach(struct device *, struct device *, void *);
64
65CFATTACH_DECL(pcmb, sizeof(struct device),
66    pcmbmatch, pcmbattach, NULL, NULL);
67
68void	pcmb_callback(struct device *);
69
70int
71pcmbmatch(struct device *parent, struct cfdata *match,
72    void *aux)
73{
74	struct pci_attach_args *pa = aux;
75
76	/*
77	 * Match anything which claims to be PCI-MCA bridge.
78	 */
79	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE
80	    && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_MC)
81		return (1);
82
83	return (0);
84}
85
86void
87pcmbattach(struct device *parent, struct device *self, void *aux)
88{
89	struct pci_attach_args *pa = aux;
90	char devinfo[256];
91
92	aprint_naive("\n");
93	aprint_normal("\n");
94
95	/*
96	 * Just print out a description and defer configuration
97	 * until all PCI devices have been attached.
98	 */
99	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
100	aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo,
101	    PCI_REVISION(pa->pa_class));
102
103	config_defer(self, pcmb_callback);
104}
105
106void
107pcmb_callback(struct device *self)
108{
109	struct mcabus_attach_args ma;
110
111	/*
112	 * Attach MCA bus behind this bridge.
113	 */
114	ma.mba_iot = X86_BUS_SPACE_IO;
115	ma.mba_memt = X86_BUS_SPACE_MEM;
116#if NMCA > 0
117	ma.mba_dmat = &mca_bus_dma_tag;
118#endif
119	ma.mba_mc = NULL;
120	ma.mba_bus = 0;
121	config_found_ia(self, "mcabus", &ma, mcabusprint);
122}
123