1/*-
2 * Copyright (c) 2015-2016 Landon Fuller <landon@landonf.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer,
10 *    without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 *    redistribution must be conditioned upon including a substantially
14 *    similar Disclaimer requirement for further binary redistribution.
15 *
16 * NO WARRANTY
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGES.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33/*
34 * BHNDB PCI SPROM driver.
35 *
36 * Provides support for early PCI bridge cores that vend SPROM CSRs
37 * via PCI configuration space.
38 */
39
40#include <sys/param.h>
41#include <sys/kernel.h>
42#include <sys/bus.h>
43#include <sys/limits.h>
44#include <sys/malloc.h>
45#include <sys/module.h>
46#include <sys/systm.h>
47
48#include <dev/pci/pcireg.h>
49#include <dev/pci/pcivar.h>
50
51#include <dev/bhnd/bhnd.h>
52#include <dev/bhnd/cores/pci/bhnd_pci_hostbvar.h>
53#include <dev/bhnd/nvram/bhnd_spromvar.h>
54
55#include "bhnd_nvram_if.h"
56
57#include "bhndb_pcireg.h"
58#include "bhndb_pcivar.h"
59
60static int
61bhndb_pci_sprom_probe(device_t dev)
62{
63	device_t	bridge, bus;
64	int		error;
65
66	/* Our parent must be a PCI-BHND bridge with an attached bhnd bus */
67	bridge = device_get_parent(dev);
68	if (device_get_driver(bridge) != &bhndb_pci_driver)
69		return (ENXIO);
70
71	bus = device_find_child(bridge, devclass_get_name(bhnd_devclass), 0);
72	if (bus == NULL)
73		return (ENXIO);
74
75	/* Defer to default driver implementation */
76	if ((error = bhnd_sprom_probe(dev)) > 0)
77		return (error);
78
79	return (BUS_PROBE_NOWILDCARD);
80}
81
82
83static device_method_t bhndb_pci_sprom_methods[] = {
84	/* Device interface */
85	DEVMETHOD(device_probe,			bhndb_pci_sprom_probe),
86	DEVMETHOD_END
87};
88
89DEFINE_CLASS_1(bhnd_nvram, bhndb_pci_sprom_driver, bhndb_pci_sprom_methods, sizeof(struct bhnd_sprom_softc), bhnd_sprom_driver);
90
91DRIVER_MODULE(bhndb_pci_sprom, bhndb, bhndb_pci_sprom_driver, bhnd_nvram_devclass, NULL, NULL);
92MODULE_DEPEND(bhndb_pci_sprom, bhnd, 1, 1, 1);
93MODULE_DEPEND(bhndb_pci_sprom, bhnd_sprom, 1, 1, 1);
94MODULE_VERSION(bhndb_pci_sprom, 1);
95