1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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/param.h>
33 #include <sys/bus.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/mutex.h>
37 #include <sys/rman.h>
38 #include <machine/bus.h>
39
40 #include <dev/ofw/openfirm.h>
41 #include <dev/ofw/ofw_bus.h>
42 #include <dev/ofw/ofw_bus_subr.h>
43
44 #include <dev/syscon/syscon.h>
45 #include <dev/syscon/syscon_generic.h>
46
47 static struct ofw_compat_data compat_data[] = {
48 {"allwinner,sun50i-a64-system-controller", 1},
49 {"allwinner,sun50i-a64-system-control", 1},
50 {"allwinner,sun8i-a83t-system-controller", 1},
51 {"allwinner,sun8i-h3-system-controller", 1},
52 {"allwinner,sun8i-h3-system-control", 1},
53 {"allwinner,sun50i-h5-system-control", 1},
54 {"allwinner,sun20i-d1-system-control", 1},
55 {NULL, 0}
56 };
57
58 static int
aw_syscon_probe(device_t dev)59 aw_syscon_probe(device_t dev)
60 {
61
62 if (!ofw_bus_status_okay(dev))
63 return (ENXIO);
64 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
65 return (ENXIO);
66
67 device_set_desc(dev, "Allwinner syscon");
68 return (BUS_PROBE_DEFAULT);
69 }
70
71 static device_method_t aw_syscon_methods[] = {
72 DEVMETHOD(device_probe, aw_syscon_probe),
73
74 DEVMETHOD_END
75 };
76
77 DEFINE_CLASS_1(aw_syscon, aw_syscon_driver, aw_syscon_methods,
78 sizeof(struct syscon_generic_softc), syscon_generic_driver);
79
80 /* aw_syscon needs to attach prior to if_awg */
81 EARLY_DRIVER_MODULE(aw_syscon, simplebus, aw_syscon_driver, 0, 0,
82 BUS_PASS_SCHEDULER + BUS_PASS_ORDER_LAST);
83 MODULE_VERSION(aw_syscon, 1);
84