1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2021 Alstom Group.
5 * Copyright (c) 2021 Semihalf.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/param.h>
29#include <sys/systm.h>
30#include <sys/bus.h>
31#include <sys/kernel.h>
32#include <sys/module.h>
33#include <sys/rman.h>
34
35#include <dev/pci/pcireg.h>
36#include <dev/pci/pcivar.h>
37#include <dev/pci/pci_private.h>
38
39#include <dev/ofw/openfirm.h>
40#include <dev/ofw/ofw_bus.h>
41#include <dev/ofw/ofw_bus_subr.h>
42
43#include "pcib_if.h"
44#include "pci_if.h"
45
46static int	ofw_pci_probe(device_t);
47static const struct ofw_bus_devinfo* pci_ofw_get_devinfo(device_t, device_t);
48
49static device_method_t ofw_pci_methods[] = {
50	DEVMETHOD(device_probe,		ofw_pci_probe),
51
52	/* ofw_bus interface */
53	DEVMETHOD(ofw_bus_get_devinfo,	pci_ofw_get_devinfo),
54	DEVMETHOD(ofw_bus_get_compat,	ofw_bus_gen_get_compat),
55	DEVMETHOD(ofw_bus_get_model,	ofw_bus_gen_get_model),
56	DEVMETHOD(ofw_bus_get_name,	ofw_bus_gen_get_name),
57	DEVMETHOD(ofw_bus_get_node,	ofw_bus_gen_get_node),
58	DEVMETHOD(ofw_bus_get_type,	ofw_bus_gen_get_type),
59
60	DEVMETHOD_END
61};
62
63DEFINE_CLASS_1(pci, ofw_pci_driver, ofw_pci_methods, sizeof(struct pci_softc),
64    pci_driver);
65DRIVER_MODULE(ofw_pci, pcib, ofw_pci_driver, 0, 0);
66MODULE_DEPEND(ofw_pci, simplebus, 1, 1, 1);
67MODULE_DEPEND(ofw_pci, pci, 1, 1, 1);
68MODULE_VERSION(ofw_pci, 1);
69
70static int
71ofw_pci_probe(device_t dev)
72{
73	device_t parent;
74
75	parent = device_get_parent(dev);
76	if (ofw_bus_get_node(parent) == -1)
77		return (ENXIO);
78
79	device_set_desc(dev, "OFW PCI bus");
80	return (BUS_PROBE_DEFAULT);
81}
82
83/* Pass the request up to our parent. */
84static const struct ofw_bus_devinfo*
85pci_ofw_get_devinfo(device_t bus, device_t dev)
86{
87
88	return OFW_BUS_GET_DEVINFO(device_get_parent(bus), dev);
89}
90