1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>
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/*
29 * Allwinner syscon driver
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD$");
34
35#include <sys/param.h>
36#include <sys/bus.h>
37#include <sys/kernel.h>
38#include <sys/module.h>
39#include <sys/mutex.h>
40#include <sys/rman.h>
41#include <machine/bus.h>
42
43#include <dev/ofw/openfirm.h>
44#include <dev/ofw/ofw_bus.h>
45#include <dev/ofw/ofw_bus_subr.h>
46
47#include <dev/extres/syscon/syscon.h>
48#include <dev/extres/syscon/syscon_generic.h>
49
50static struct ofw_compat_data compat_data[] = {
51	{"allwinner,sun50i-a64-system-controller", 1},
52	{"allwinner,sun50i-a64-system-control", 1},
53	{"allwinner,sun8i-a83t-system-controller", 1},
54	{"allwinner,sun8i-h3-system-controller", 1},
55	{"allwinner,sun8i-h3-system-control", 1},
56	{"allwinner,sun50i-h5-system-control", 1},
57	{NULL,             0}
58};
59
60static int
61aw_syscon_probe(device_t dev)
62{
63
64	if (!ofw_bus_status_okay(dev))
65		return (ENXIO);
66	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
67		return (ENXIO);
68
69	device_set_desc(dev, "Allwinner syscon");
70	return (BUS_PROBE_DEFAULT);
71}
72
73static device_method_t aw_syscon_methods[] = {
74	DEVMETHOD(device_probe, aw_syscon_probe),
75
76	DEVMETHOD_END
77};
78
79DEFINE_CLASS_1(aw_syscon, aw_syscon_driver, aw_syscon_methods,
80    sizeof(struct syscon_generic_softc), syscon_generic_driver);
81
82static devclass_t aw_syscon_devclass;
83/* aw_syscon needs to attach prior to if_awg */
84EARLY_DRIVER_MODULE(aw_syscon, simplebus, aw_syscon_driver, aw_syscon_devclass,
85    0, 0, BUS_PASS_SCHEDULER + BUS_PASS_ORDER_LAST);
86MODULE_VERSION(aw_syscon, 1);
87