1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 * $FreeBSD$
28 */
29
30 #include "opt_ddb.h"
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kdb.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/malloc.h>
38 #include <sys/bus.h>
39 #include <machine/bus.h>
40 #include <sys/rman.h>
41
42 #include <machine/resource.h>
43
44 #include <dev/ofw/openfirm.h>
45
46 #include <powerpc/powermac/maciovar.h>
47
48 struct pswitch_softc {
49 int sc_irqrid;
50 struct resource *sc_irq;
51 void *sc_ih;
52 };
53
54 static int pswitch_probe(device_t);
55 static int pswitch_attach(device_t);
56
57 static int pswitch_intr(void *);
58
59 static device_method_t pswitch_methods[] = {
60 /* Device interface */
61 DEVMETHOD(device_probe, pswitch_probe),
62 DEVMETHOD(device_attach, pswitch_attach),
63
64 { 0, 0 }
65 };
66
67 static driver_t pswitch_driver = {
68 "pswitch",
69 pswitch_methods,
70 sizeof(struct pswitch_softc)
71 };
72
73 static devclass_t pswitch_devclass;
74
75 DRIVER_MODULE(pswitch, macio, pswitch_driver, pswitch_devclass, 0, 0);
76
77 static int
pswitch_probe(device_t dev)78 pswitch_probe(device_t dev)
79 {
80 char *type = macio_get_devtype(dev);
81
82 if (strcmp(type, "gpio") != 0)
83 return (ENXIO);
84
85 device_set_desc(dev, "GPIO Programmer's Switch");
86 return (0);
87 }
88
89 static int
pswitch_attach(device_t dev)90 pswitch_attach(device_t dev)
91 {
92 struct pswitch_softc *sc;
93 phandle_t node, child;
94 char type[32];
95 u_int irq[2];
96
97 sc = device_get_softc(dev);
98 node = macio_get_node(dev);
99
100 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
101 if (OF_getprop(child, "device_type", type, 32) == -1)
102 continue;
103
104 if (strcmp(type, "programmer-switch") == 0)
105 break;
106 }
107
108 if (child == 0) {
109 device_printf(dev, "could not find correct node\n");
110 return (ENXIO);
111 }
112
113 if (OF_getprop(child, "interrupts", irq, sizeof(irq)) == -1) {
114 device_printf(dev, "could not get interrupt\n");
115 return (ENXIO);
116 }
117
118 sc->sc_irqrid = 0;
119 sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->sc_irqrid,
120 irq[0], irq[0], 1, RF_ACTIVE);
121 if (sc->sc_irq == NULL) {
122 device_printf(dev, "could not allocate interrupt\n");
123 return (ENXIO);
124 }
125
126 if (bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC,
127 pswitch_intr, NULL, dev, &sc->sc_ih) != 0) {
128 device_printf(dev, "could not setup interrupt\n");
129 bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irqrid,
130 sc->sc_irq);
131 return (ENXIO);
132 }
133
134 return (0);
135 }
136
137 static int
pswitch_intr(void * arg)138 pswitch_intr(void *arg)
139 {
140 device_t dev;
141
142 dev = (device_t)arg;
143
144 kdb_enter(KDB_WHY_POWERPC, device_get_nameunit(dev));
145 return (FILTER_HANDLED);
146 }
147