openpic_iobus.c revision 131102 
1/*
2 * Copyright 2003 by Peter Grehan. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 *    derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 */
28
29/*
30 * The psim iobus attachment for the OpenPIC interrupt controller.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/powerpc/psim/openpic_iobus.c 131102 2004-06-25 13:42:48Z grehan $");
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/module.h>
39#include <sys/bus.h>
40#include <sys/conf.h>
41#include <sys/kernel.h>
42
43#include <dev/ofw/openfirm.h>
44
45#include <machine/bus.h>
46#include <machine/intr.h>
47#include <machine/intr_machdep.h>
48#include <machine/md_var.h>
49#include <machine/nexusvar.h>
50#include <machine/pio.h>
51#include <machine/resource.h>
52
53#include <vm/vm.h>
54#include <vm/pmap.h>
55
56#include <sys/rman.h>
57
58#include <machine/openpicvar.h>
59#include <powerpc/psim/iobusvar.h>
60
61#include "pic_if.h"
62
63struct openpic_iobus_softc {
64	struct openpic_softc osc;
65	struct resource *sc_memr;	/* iobus mem resource */
66	device_t	sc_ndev;	/* nexus device */
67};
68
69static struct openpic_iobus_softc *ppicsoftc;
70
71/*
72 * MacIO interface
73 */
74static void	openpic_psim_identify(driver_t *, device_t);
75static int	openpic_psim_probe(device_t);
76static int	openpic_psim_attach(device_t);
77static int	openpic_iobus_probe(device_t);
78static int	openpic_iobus_attach(device_t);
79
80/*
81 * Nexus attachment
82 */
83static device_method_t  openpic_psim_methods[] = {
84	/* Device interface */
85	DEVMETHOD(device_identify,	openpic_psim_identify),
86	DEVMETHOD(device_probe,		openpic_psim_probe),
87	DEVMETHOD(device_attach,	openpic_psim_attach),
88
89	/* PIC interface */
90	DEVMETHOD(pic_allocate_intr,	openpic_allocate_intr),
91	DEVMETHOD(pic_setup_intr,	openpic_setup_intr),
92	DEVMETHOD(pic_teardown_intr,	openpic_teardown_intr),
93	DEVMETHOD(pic_release_intr,	openpic_release_intr),
94
95	{ 0, 0 }
96};
97
98static driver_t openpic_psim_driver = {
99	"openpic",
100	openpic_psim_methods,
101	sizeof(struct openpic_iobus_softc)
102};
103
104static devclass_t openpic_psim_devclass;
105
106DRIVER_MODULE(openpic_psim, nexus, openpic_psim_driver, openpic_psim_devclass,
107    0, 0);
108
109static void
110openpic_psim_identify(driver_t *driver, device_t parent)
111{
112	device_t child;
113	phandle_t pic;
114
115	pic = OF_finddevice("/iobus/opic");
116	if (pic == -1)
117		return;
118
119	child = BUS_ADD_CHILD(parent, 0, "openpic", 0);
120	if (child != NULL)
121		nexus_set_device_type(child, "psim");
122}
123
124static int
125openpic_psim_probe(device_t dev)
126{
127	char    *name;
128	char	*type;
129
130	name = nexus_get_name(dev);
131	type = nexus_get_device_type(dev);
132
133	if (strcmp(name, "openpic") != 0 ||
134	    strcmp(type, "psim") != 0)
135		return (ENXIO);
136
137	device_set_desc(dev, OPENPIC_DEVSTR);
138	return (0);
139}
140
141static int
142openpic_psim_attach(device_t dev)
143{
144	KASSERT(ppicsoftc == NULL, ("iobus openpic: already probed"));
145	ppicsoftc = device_get_softc(dev);
146	ppicsoftc->sc_ndev = dev;
147
148	nexus_install_intcntlr(dev);
149	openpic_early_attach(dev);
150	return (0);
151}
152
153/*
154 * PSIM IOBus attachment
155 */
156static device_method_t  openpic_iobus_methods[] = {
157	/* Device interface */
158	DEVMETHOD(device_probe,		openpic_iobus_probe),
159	DEVMETHOD(device_attach,	openpic_iobus_attach),
160
161	{ 0, 0 },
162};
163
164static driver_t openpic_iobus_driver = {
165	"openpiciobus",
166	openpic_iobus_methods,
167	0
168};
169
170static devclass_t openpic_iobus_devclass;
171
172DRIVER_MODULE(openpiciobus, iobus, openpic_iobus_driver,
173    openpic_iobus_devclass, 0, 0);
174
175static int
176openpic_iobus_probe(device_t dev)
177{
178	char *name;
179
180	name = iobus_get_name(dev);
181	if (strcmp(name, "interrupt-controller") != 0)
182                return (ENXIO);
183
184	/*
185	 * The description was already printed out in the nexus
186	 * probe, so don't do it again here
187	 */
188	device_set_desc(dev, "OpenPIC IOBus interrupt cell");
189	if (!bootverbose)
190		device_quiet(dev);
191	return (0);
192}
193
194static int
195openpic_iobus_attach(device_t dev)
196{
197	struct openpic_iobus_softc *sc;
198	int rid;
199
200	sc = ppicsoftc;
201	KASSERT(sc != NULL, ("pic not nexus-probed\n"));
202
203	rid = 0;
204	sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
205	     RF_ACTIVE);
206
207	if (sc->sc_memr == NULL) {
208		device_printf(dev, "Could not alloc mem resource!\n");
209		return (ENXIO);
210	}
211
212	sc->osc.sc_psim = 1;
213	sc->osc.sc_bt = rman_get_bustag(sc->sc_memr);
214	sc->osc.sc_bh = rman_get_bushandle(sc->sc_memr);
215	sc->osc.sc_altdev = dev;
216
217	return (openpic_attach(sc->sc_ndev));
218}
219
220
221