1/*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/param.h>
32#include <sys/module.h>
33#include <sys/bus.h>
34#include <sys/malloc.h>
35#include <sys/kernel.h>
36
37#include <dev/ofw/openfirm.h>
38#include <dev/ofw/ofw_pci.h>
39#include <dev/ofw/ofw_bus.h>
40#include <dev/ofw/ofw_bus_subr.h>
41
42#include <dev/pci/pcivar.h>
43#include <dev/pci/pcireg.h>
44#include <dev/pci/pcib_private.h>
45
46#include <machine/intr_machdep.h>
47
48#include "pcib_if.h"
49
50static int	ofw_pcib_pci_probe(device_t bus);
51static int	ofw_pcib_pci_attach(device_t bus);
52static phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev);
53static int	ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev,
54		    int intpin);
55
56static device_method_t ofw_pcib_pci_methods[] = {
57	/* Device interface */
58	DEVMETHOD(device_probe,		ofw_pcib_pci_probe),
59	DEVMETHOD(device_attach,	ofw_pcib_pci_attach),
60
61	/* pcib interface */
62	DEVMETHOD(pcib_route_interrupt,	ofw_pcib_pci_route_interrupt),
63
64	/* ofw_bus interface */
65	DEVMETHOD(ofw_bus_get_node,	ofw_pcib_pci_get_node),
66
67	DEVMETHOD_END
68};
69
70static devclass_t pcib_devclass;
71
72struct ofw_pcib_softc {
73        /*
74         * This is here so that we can use pci bridge methods, too - the
75         * generic routines only need the dev, secbus and subbus members
76         * filled.
77         */
78        struct pcib_softc       ops_pcib_sc;
79	phandle_t		ops_node;
80        struct ofw_bus_iinfo    ops_iinfo;
81};
82
83DEFINE_CLASS_1(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods,
84    sizeof(struct ofw_pcib_softc), pcib_driver);
85DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, pcib_devclass, 0, 0);
86
87static int
88ofw_pcib_pci_probe(device_t dev)
89{
90
91	if ((pci_get_class(dev) != PCIC_BRIDGE) ||
92	    (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) {
93		return (ENXIO);
94	}
95
96	if (ofw_bus_get_node(dev) == -1)
97		return (ENXIO);
98
99	device_set_desc(dev, "OFW PCI-PCI bridge");
100	return (0);
101}
102
103static int
104ofw_pcib_pci_attach(device_t dev)
105{
106	struct ofw_pcib_softc *sc;
107
108	sc = device_get_softc(dev);
109	sc->ops_pcib_sc.dev = dev;
110	sc->ops_node = ofw_bus_get_node(dev);
111
112	ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo,
113	    sizeof(cell_t));
114
115	pcib_attach_common(dev);
116
117	device_add_child(dev, "pci", -1);
118
119	return (bus_generic_attach(dev));
120}
121
122static phandle_t
123ofw_pcib_pci_get_node(device_t bridge, device_t dev)
124{
125	/* We have only one child, the PCI bus, so pass it our node */
126
127	return (ofw_bus_get_node(bridge));
128}
129
130static int
131ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin)
132{
133	struct ofw_pcib_softc *sc;
134	struct ofw_bus_iinfo *ii;
135	struct ofw_pci_register reg;
136	cell_t pintr, mintr;
137	phandle_t iparent;
138	uint8_t maskbuf[sizeof(reg) + sizeof(pintr)];
139
140	sc = device_get_softc(bridge);
141	ii = &sc->ops_iinfo;
142	if (ii->opi_imapsz > 0) {
143		pintr = intpin;
144		if (ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, &reg,
145		    sizeof(reg), &pintr, sizeof(pintr), &mintr, sizeof(mintr),
146		    &iparent, maskbuf)) {
147			/*
148			 * If we've found a mapping, return it and don't map
149			 * it again on higher levels - that causes problems
150			 * in some cases, and never seems to be required.
151			 */
152			return (MAP_IRQ(iparent, mintr));
153		}
154	} else if (intpin >= 1 && intpin <= 4) {
155		/*
156		 * When an interrupt map is missing, we need to do the
157		 * standard PCI swizzle and continue mapping at the parent.
158		 */
159		return (pcib_route_interrupt(bridge, dev, intpin));
160	}
161	return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent(
162	    bridge)), bridge, intpin));
163}
164
165