1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2020 Andrew Turner
5 *
6 * This work was supported by Innovate UK project 105694, "Digital Security
7 * by Design (DSbD) Technology Platform Prototype".
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/bus.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/lock.h>
37 #include <sys/mutex.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 <dev/gpio/gpiobusvar.h>
44
45 #include "pl061.h"
46
47 static int
pl061_fdt_probe(device_t dev)48 pl061_fdt_probe(device_t dev)
49 {
50 if (!ofw_bus_status_okay(dev))
51 return (ENXIO);
52
53 if (!ofw_bus_is_compatible(dev, "arm,pl061"))
54 return (ENXIO);
55
56 device_set_desc(dev, "Arm PL061 GPIO Controller");
57
58 return (BUS_PROBE_DEFAULT);
59 }
60
61 static int
pl061_fdt_attach(device_t dev)62 pl061_fdt_attach(device_t dev)
63 {
64 int error;
65
66 error = pl061_attach(dev);
67 if (error != 0)
68 return (error);
69
70 if (!intr_pic_register(dev, OF_xref_from_node(ofw_bus_get_node(dev)))) {
71 device_printf(dev, "couldn't register PIC\n");
72 pl061_detach(dev);
73 error = ENXIO;
74 }
75
76 return (error);
77 }
78
79 static device_method_t pl061_fdt_methods[] = {
80 /* Device interface */
81 DEVMETHOD(device_probe, pl061_fdt_probe),
82 DEVMETHOD(device_attach, pl061_fdt_attach),
83
84 DEVMETHOD_END
85 };
86
87 DEFINE_CLASS_1(gpio, pl061_fdt_driver, pl061_fdt_methods,
88 sizeof(struct pl061_softc), pl061_driver);
89
90 EARLY_DRIVER_MODULE(pl061, ofwbus, pl061_fdt_driver, NULL, NULL,
91 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE);
92 MODULE_DEPEND(pl061, gpiobus, 1, 1, 1);
93