1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2020 Amazon.com, Inc. or its affiliates.
5 * All rights reserved.
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 AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "opt_acpi.h"
30
31 #include <sys/cdefs.h>
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/bus.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/lock.h>
38 #include <sys/mutex.h>
39
40 #include <machine/intr.h>
41
42 #include <contrib/dev/acpica/include/acpi.h>
43 #include <contrib/dev/acpica/include/accommon.h>
44
45 #include <dev/acpica/acpivar.h>
46 #include <dev/gpio/gpiobusvar.h>
47
48 #include "pl061.h"
49
50 static char *gpio_ids[] = { "ARMH0061", NULL };
51
52 static int
pl061_acpi_probe(device_t dev)53 pl061_acpi_probe(device_t dev)
54 {
55 int rv;
56
57 if (acpi_disabled("gpio"))
58 return (ENXIO);
59
60 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, gpio_ids, NULL);
61
62 if (rv <= 0)
63 device_set_desc(dev, "Arm PL061 GPIO Controller");
64
65 return (rv);
66 }
67
68 static int
pl061_acpi_attach(device_t dev)69 pl061_acpi_attach(device_t dev)
70 {
71 int error;
72
73 error = pl061_attach(dev);
74 if (error != 0)
75 return (error);
76
77 if (!intr_pic_register(dev, ACPI_GPIO_XREF)) {
78 device_printf(dev, "couldn't register PIC\n");
79 pl061_detach(dev);
80 error = ENXIO;
81 }
82
83 return (error);
84 }
85
86 static device_method_t pl061_acpi_methods[] = {
87 /* Device interface */
88 DEVMETHOD(device_probe, pl061_acpi_probe),
89 DEVMETHOD(device_attach, pl061_acpi_attach),
90
91 DEVMETHOD_END
92 };
93
94 DEFINE_CLASS_1(gpio, pl061_acpi_driver, pl061_acpi_methods,
95 sizeof(struct pl061_softc), pl061_driver);
96
97 static devclass_t pl061_devclass;
98
99 EARLY_DRIVER_MODULE(pl061, acpi, pl061_acpi_driver, pl061_devclass, NULL, NULL,
100 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE);
101 MODULE_DEPEND(pl061, acpi, 1, 1, 1);
102 MODULE_DEPEND(pl061, gpiobus, 1, 1, 1);
103