1/*
2 * Copyright (C) 2002 Benno Rice.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * $FreeBSD: head/sys/powerpc/powermac/pswitch.c 110441 2003-02-06 11:07:39Z benno $
26 */
27
28#include "opt_ddb.h"
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/kernel.h>
33#include <sys/malloc.h>
34#include <sys/bus.h>
35#include <machine/bus.h>
36#include <sys/rman.h>
37
38#include <machine/resource.h>
39
40#include <dev/ofw/openfirm.h>
41
42#include <powerpc/powermac/maciovar.h>
43
44struct pswitch_softc {
45 int sc_irqrid;
46 struct resource *sc_irq;
47 void *sc_ih;
48};
49
50static int pswitch_probe(device_t);
51static int pswitch_attach(device_t);
52
53static void pswitch_intr(void *);
54
55static device_method_t pswitch_methods[] = {
56 /* Device interface */
57 DEVMETHOD(device_probe, pswitch_probe),
58 DEVMETHOD(device_attach, pswitch_attach),
59
60 { 0, 0 }
61};
62
63static driver_t pswitch_driver = {
64 "pswitch",
65 pswitch_methods,
66 sizeof(struct pswitch_softc)
67};
68
69static devclass_t pswitch_devclass;
70
71DRIVER_MODULE(pswitch, macio, pswitch_driver, pswitch_devclass, 0, 0);
72
73static int
74pswitch_probe(device_t dev)
75{
76 char *type = macio_get_devtype(dev);
77
78 if (strcmp(type, "gpio") != 0)
79 return (ENXIO);
80
81 device_set_desc(dev, "GPIO Programmer's Switch");
82 return (0);
83}
84
85static int
86pswitch_attach(device_t dev)
87{
88 struct pswitch_softc *sc;
89 phandle_t node, child;
90 char type[32];
91 u_int irq[2];
92
93 sc = device_get_softc(dev);
94 node = macio_get_node(dev);
95
96 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
97 if (OF_getprop(child, "device_type", type, 32) == -1)
98 continue;
99
100 if (strcmp(type, "programmer-switch") == 0)
101 break;
102 }
103
104 if (child == 0) {
105 device_printf(dev, "could not find correct node\n");
106 return (ENXIO);
107 }
108
109 if (OF_getprop(child, "interrupts", irq, sizeof(irq)) == -1) {
110 device_printf(dev, "could not get interrupt\n");
111 return (ENXIO);
112 }
113
114 sc->sc_irqrid = 0;
115 sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->sc_irqrid,
116 irq[0], irq[0], 1, RF_ACTIVE);
117 if (sc->sc_irq == NULL) {
118 device_printf(dev, "could not allocate interrupt\n");
119 return (ENXIO);
120 }
121
122 if (bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC | INTR_FAST,
123 pswitch_intr, dev, &sc->sc_ih) != 0) {
124 device_printf(dev, "could not setup interrupt\n");
125 bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irqrid,
126 sc->sc_irq);
127 return (ENXIO);
128 }
129
130 return (0);
131}
132
133static void
134pswitch_intr(void *arg)
135{
136 device_t dev;
137
138 dev = (device_t)arg;
139
140#ifdef DDB
141 Debugger(device_get_nameunit(dev));
142#else
143 device_printf(dev, "close, but no debugger\n");
144#endif
145}