summaryrefslogtreecommitdiff
path: root/sys/arch/evbmips/loongson/dev/pcib.c
blob: 5bc20a71436975417fc95537af9361fbd439f7f8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/*	$NetBSD: pcib.c,v 1.4 2021/08/07 16:18:51 thorpej Exp $	*/

/*-
 * Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pcib.c,v 1.4 2021/08/07 16:18:51 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>


#include <evbmips/loongson/autoconf.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>

#include <dev/isa/isavar.h>

#include <evbmips/loongson/loongson_bus_defs.h>
#include <evbmips/loongson/dev/pcibvar.h>

#include "isa.h"

int	pcibmatch(device_t, cfdata_t, void *);
void	pcib_callback(device_t);

CFATTACH_DECL3_NEW(pcib, sizeof(struct pcib_softc),
    pcibmatch, pcibattach, pcibdetach, NULL, pcibrescan, pcibchilddet,
	DVF_DETACH_SHUTDOWN);


int
pcibmatch(device_t parent, cfdata_t match, void *aux)
{
	struct pci_attach_args *pa = aux;

	switch (PCI_VENDOR(pa->pa_id)) {
	case PCI_VENDOR_INTEL:
		switch (PCI_PRODUCT(pa->pa_id)) {
		case PCI_PRODUCT_INTEL_SIO:
		case PCI_PRODUCT_INTEL_82371MX:
		case PCI_PRODUCT_INTEL_82371AB_ISA:
		case PCI_PRODUCT_INTEL_82440MX_ISA:
			/* The above bridges mis-identify themselves */
			return (1);
		}
		break;
	case PCI_VENDOR_SIS:
		switch (PCI_PRODUCT(pa->pa_id)) {
		case PCI_PRODUCT_SIS_85C503:
			/* mis-identifies itself as a miscellaneous prehistoric */
			return (1);
		}
		break;
	case PCI_VENDOR_VIATECH:
		switch (PCI_PRODUCT(pa->pa_id)) {
		case PCI_PRODUCT_VIATECH_VT82C686A_PWR:
			/* mis-identifies itself as a ISA bridge */
			return (0);
		}
		break;
	}

	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA)
		return (1);

	return (0);
}

void
pcibattach(device_t parent, device_t self, void *aux)
{
	struct pcib_softc *sc = device_private(self);
	struct pci_attach_args *pa = (struct pci_attach_args *)aux;
	char devinfo[256];

	aprint_naive("\n");

	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
	aprint_normal(": %s (rev. 0x%02x)\n", devinfo,
	    PCI_REVISION(pa->pa_class));

	/*
	 * Wait until all PCI devices are attached before attaching isa;
	 * otherwise this might mess the interrupt setup on some systems.
	 */
	sc->sc_pc = pa->pa_pc;
	sc->sc_tag = pa->pa_tag;

	if (!pmf_device_register(self, NULL, NULL))
		aprint_error_dev(self, "couldn't establish power handler\n");
	config_defer(self, pcib_callback);
}

int
pcibdetach(device_t self, int flags)
{
	int rc;

	if ((rc = config_detach_children(self, flags)) != 0)
		return rc;
	pmf_device_deregister(self);
	return 0;
}

void
pcibchilddet(device_t self, device_t child)
{
	struct pcib_softc *sc = device_private(self);

	if (sc->sc_isabus == child)
		sc->sc_isabus = NULL;
}

int
pcibrescan(device_t self, const char *ifattr, const int *loc)
{
	struct pcib_softc *sc = device_private(self);
	struct isabus_attach_args iba;

	/*
	 * pcib only carries "isabus", but this can also be used
	 * by other drivers that carry additional interface attributes.
	 */
	if (ifattr_match(ifattr, "isabus") && sc->sc_isabus == NULL) {
		/*
		 * Attach the ISA bus behind this bridge.
		 */
		memset(&iba, 0, sizeof(iba));
		iba.iba_iot = &bonito_iot;
		iba.iba_memt = &bonito_memt;
#if NISA > 0
		iba.iba_dmat = &bonito_dmat;
#endif
		iba.iba_ic = sys_platform->isa_chipset;

		if (iba.iba_ic != NULL) 
			sc->sc_isabus =
			    config_found(self, &iba, isabusprint,
					 CFARGS(.iattr = "isabus"));
	}
	return 0;
}


void
pcib_callback(device_t self)
{
	pcibrescan(self, "isabus", NULL);
}