openpic_iobus.c revision 124469 
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 124469 2004-01-13 11:24:36Z grehan $");
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/bus.h>
39#include <sys/conf.h>
40#include <sys/kernel.h>
41
42#include <dev/ofw/openfirm.h>
43
44#include <machine/bus.h>
45#include <machine/intr.h>
46#include <machine/intr_machdep.h>
47#include <machine/md_var.h>
48#include <machine/nexusvar.h>
49#include <machine/pio.h>
50#include <machine/resource.h>
51
52#include <vm/vm.h>
53#include <vm/pmap.h>
54
55#include <sys/rman.h>
56
57#include <machine/openpicvar.h>
58#include <powerpc/psim/iobusvar.h>
59
60#include "pic_if.h"
61
62struct openpic_iobus_softc {
63	struct openpic_softc osc;
64	struct resource *sc_memr;	/* iobus mem resource */
65	device_t	sc_ndev;	/* nexus device */
66};
67
68static struct openpic_iobus_softc *ppicsoftc;
69
70/*
71 * MacIO interface
72 */
73static void	openpic_psim_identify(driver_t *, device_t);
74static int	openpic_psim_probe(device_t);
75static int	openpic_psim_attach(device_t);
76static int	openpic_iobus_probe(device_t);
77static int	openpic_iobus_attach(device_t);
78
79/*
80 * Nexus attachment
81 */
82static device_method_t  openpic_psim_methods[] = {
83	/* Device interface */
84	DEVMETHOD(device_identify,	openpic_psim_identify),
85	DEVMETHOD(device_probe,		openpic_psim_probe),
86	DEVMETHOD(device_attach,	openpic_psim_attach),
87
88	/* PIC interface */
89	DEVMETHOD(pic_allocate_intr,	openpic_allocate_intr),
90	DEVMETHOD(pic_setup_intr,	openpic_setup_intr),
91	DEVMETHOD(pic_teardown_intr,	openpic_teardown_intr),
92	DEVMETHOD(pic_release_intr,	openpic_release_intr),
93
94	{ 0, 0 }
95};
96
97static driver_t openpic_psim_driver = {
98	"openpic",
99	openpic_psim_methods,
100	sizeof(struct openpic_iobus_softc)
101};
102
103static devclass_t openpic_psim_devclass;
104
105DRIVER_MODULE(openpic_psim, nexus, openpic_psim_driver, openpic_psim_devclass,
106    0, 0);
107
108static void
109openpic_psim_identify(driver_t *driver, device_t parent)
110{
111	device_t child;
112	phandle_t pic;
113
114	pic = OF_finddevice("/iobus/opic");
115	if (pic == -1)
116		return;
117
118	child = BUS_ADD_CHILD(parent, 0, "openpic", 0);
119	if (child != NULL)
120		nexus_set_device_type(child, "psim");
121}
122
123static int
124openpic_psim_probe(device_t dev)
125{
126	char    *name;
127	char	*type;
128
129	name = nexus_get_name(dev);
130	type = nexus_get_device_type(dev);
131
132	if (strcmp(name, "openpic") != 0 ||
133	    strcmp(type, "psim") != 0)
134		return (ENXIO);
135
136	device_set_desc(dev, OPENPIC_DEVSTR);
137	return (0);
138}
139
140static int
141openpic_psim_attach(device_t dev)
142{
143	KASSERT(ppicsoftc == NULL, ("iobus openpic: already probed"));
144	ppicsoftc = device_get_softc(dev);
145	ppicsoftc->sc_ndev = dev;
146
147	nexus_install_intcntlr(dev);
148	openpic_early_attach(dev);
149	return (0);
150}
151
152/*
153 * PSIM IOBus attachment
154 */
155static device_method_t  openpic_iobus_methods[] = {
156	/* Device interface */
157	DEVMETHOD(device_probe,		openpic_iobus_probe),
158	DEVMETHOD(device_attach,	openpic_iobus_attach),
159
160	{ 0, 0 },
161};
162
163static driver_t openpic_iobus_driver = {
164	"openpiciobus",
165	openpic_iobus_methods,
166	0
167};
168
169static devclass_t openpic_iobus_devclass;
170
171DRIVER_MODULE(openpiciobus, iobus, openpic_iobus_driver,
172    openpic_iobus_devclass, 0, 0);
173
174static int
175openpic_iobus_probe(device_t dev)
176{
177	char *name;
178
179	name = iobus_get_name(dev);
180	if (strcmp(name, "interrupt-controller") != 0)
181                return (ENXIO);
182
183	/*
184	 * The description was already printed out in the nexus
185	 * probe, so don't do it again here
186	 */
187	device_set_desc(dev, "OpenPIC IOBus interrupt cell");
188	if (!bootverbose)
189		device_quiet(dev);
190	return (0);
191}
192
193static int
194openpic_iobus_attach(device_t dev)
195{
196	struct openpic_iobus_softc *sc;
197	int rid;
198
199	sc = ppicsoftc;
200	KASSERT(sc != NULL, ("pic not nexus-probed\n"));
201
202	rid = 0;
203	sc->sc_memr = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 1,
204	     RF_ACTIVE);
205
206	if (sc->sc_memr == NULL) {
207		device_printf(dev, "Could not alloc mem resource!\n");
208		return (ENXIO);
209	}
210
211	sc->osc.sc_psim = 1;
212	sc->osc.sc_bt = rman_get_bustag(sc->sc_memr);
213	sc->osc.sc_bh = rman_get_bushandle(sc->sc_memr);
214	sc->osc.sc_altdev = dev;
215
216	return (openpic_attach(sc->sc_ndev));
217}
218
219
220