1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (C) 2002 Benno Rice.
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 Benno Rice ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "opt_ddb.h"
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kdb.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/malloc.h>
36 #include <sys/bus.h>
37 #include <machine/bus.h>
38 #include <sys/rman.h>
39
40 #include <machine/resource.h>
41
42 #include <dev/ofw/ofw_bus.h>
43 #include <dev/ofw/openfirm.h>
44
45 #include <powerpc/powermac/maciovar.h>
46
47 struct pswitch_softc {
48 int sc_irq_rid;
49 struct resource *sc_irq;
50 void *sc_ih;
51 };
52
53 static int pswitch_probe(device_t);
54 static int pswitch_attach(device_t);
55
56 static int pswitch_intr(void *);
57
58 static device_method_t pswitch_methods[] = {
59 /* Device interface */
60 DEVMETHOD(device_probe, pswitch_probe),
61 DEVMETHOD(device_attach, pswitch_attach),
62 { 0, 0 }
63 };
64
65 static driver_t pswitch_driver = {
66 "pswitch",
67 pswitch_methods,
68 sizeof(struct pswitch_softc)
69 };
70
71 EARLY_DRIVER_MODULE(pswitch, macgpio, pswitch_driver, 0, 0, BUS_PASS_RESOURCE);
72
73 static int
pswitch_probe(device_t dev)74 pswitch_probe(device_t dev)
75 {
76 const char *type = ofw_bus_get_type(dev);
77
78 if (strcmp(type, "programmer-switch") != 0)
79 return (ENXIO);
80
81 device_set_desc(dev, "GPIO Programmer's Switch");
82 return (0);
83 }
84
85 static int
pswitch_attach(device_t dev)86 pswitch_attach(device_t dev)
87 {
88 struct pswitch_softc *sc;
89
90 sc = device_get_softc(dev);
91
92 sc->sc_irq_rid = 0;
93 sc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ,
94 &sc->sc_irq_rid, RF_ACTIVE);
95 if (sc->sc_irq == NULL) {
96 device_printf(dev, "could not allocate interrupt\n");
97 return (ENXIO);
98 }
99
100 if (bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC | INTR_EXCL,
101 pswitch_intr, NULL, dev, &sc->sc_ih) != 0) {
102 device_printf(dev, "could not setup interrupt\n");
103 bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irq_rid,
104 sc->sc_irq);
105 return (ENXIO);
106 }
107
108 return (0);
109 }
110
111 static int
pswitch_intr(void * arg)112 pswitch_intr(void *arg)
113 {
114 device_t dev;
115
116 dev = (device_t)arg;
117
118 kdb_enter(KDB_WHY_POWERPC, device_get_nameunit(dev));
119 return (FILTER_HANDLED);
120 }
121