1198090Srdivacky/*-
2198090Srdivacky * SPDX-License-Identifier: BSD-2-Clause
3198090Srdivacky *
4198090Srdivacky * Copyright (C) 2002 Benno Rice.
5198090Srdivacky * All rights reserved.
6198090Srdivacky *
7198090Srdivacky * Redistribution and use in source and binary forms, with or without
8198090Srdivacky * modification, are permitted provided that the following conditions
9198090Srdivacky * are met:
10198090Srdivacky * 1. Redistributions of source code must retain the above copyright
11198090Srdivacky *    notice, this list of conditions and the following disclaimer.
12198090Srdivacky * 2. Redistributions in binary form must reproduce the above copyright
13198090Srdivacky *    notice, this list of conditions and the following disclaimer in the
14198090Srdivacky *    documentation and/or other materials provided with the distribution.
15198090Srdivacky *
16198090Srdivacky * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
17198090Srdivacky * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18198090Srdivacky * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19198090Srdivacky * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20198090Srdivacky * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21198090Srdivacky * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22198090Srdivacky * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23198090Srdivacky * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24198090Srdivacky * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25198090Srdivacky * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26198090Srdivacky */
27198090Srdivacky
28198090Srdivacky#include "opt_ddb.h"
29198090Srdivacky
30198090Srdivacky#include <sys/param.h>
31198090Srdivacky#include <sys/systm.h>
32198090Srdivacky#include <sys/kdb.h>
33198090Srdivacky#include <sys/kernel.h>
34198090Srdivacky#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
47struct pswitch_softc {
48	int		sc_irq_rid;
49	struct resource	*sc_irq;
50	void		*sc_ih;
51};
52
53static int	pswitch_probe(device_t);
54static int	pswitch_attach(device_t);
55
56static int	pswitch_intr(void *);
57
58static 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
65static driver_t pswitch_driver = {
66	"pswitch",
67	pswitch_methods,
68	sizeof(struct pswitch_softc)
69};
70
71EARLY_DRIVER_MODULE(pswitch, macgpio, pswitch_driver, 0, 0, BUS_PASS_RESOURCE);
72
73static int
74pswitch_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
85static int
86pswitch_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
111static int
112pswitch_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