openpic_iobus.c revision 131400 
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 131400 2004-07-01 07:59:08Z grehan $");
35
36#define __RMAN_RESOURCE_VISIBLE
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/module.h>
40#include <sys/bus.h>
41#include <sys/conf.h>
42#include <sys/kernel.h>
43
44#include <dev/ofw/openfirm.h>
45
46#include <machine/bus.h>
47#include <machine/intr.h>
48#include <machine/intr_machdep.h>
49#include <machine/md_var.h>
50#include <machine/nexusvar.h>
51#include <machine/pio.h>
52#include <machine/resource.h>
53
54#include <vm/vm.h>
55#include <vm/pmap.h>
56
57#include <sys/rman.h>
58
59#include <machine/openpicvar.h>
60#include <powerpc/psim/iobusvar.h>
61
62#include "pic_if.h"
63
64struct openpic_iobus_softc {
65	struct openpic_softc osc;
66	struct resource *sc_memr;	/* iobus mem resource */
67	device_t	sc_ndev;	/* nexus device */
68};
69
70static struct openpic_iobus_softc *ppicsoftc;
71
72/*
73 * MacIO interface
74 */
75static void	openpic_psim_identify(driver_t *, device_t);
76static int	openpic_psim_probe(device_t);
77static int	openpic_psim_attach(device_t);
78static int	openpic_iobus_probe(device_t);
79static int	openpic_iobus_attach(device_t);
80
81/*
82 * Nexus attachment
83 */
84static device_method_t  openpic_psim_methods[] = {
85	/* Device interface */
86	DEVMETHOD(device_identify,	openpic_psim_identify),
87	DEVMETHOD(device_probe,		openpic_psim_probe),
88	DEVMETHOD(device_attach,	openpic_psim_attach),
89
90	/* PIC interface */
91	DEVMETHOD(pic_allocate_intr,	openpic_allocate_intr),
92	DEVMETHOD(pic_setup_intr,	openpic_setup_intr),
93	DEVMETHOD(pic_teardown_intr,	openpic_teardown_intr),
94	DEVMETHOD(pic_release_intr,	openpic_release_intr),
95
96	{ 0, 0 }
97};
98
99static driver_t openpic_psim_driver = {
100	"openpic",
101	openpic_psim_methods,
102	sizeof(struct openpic_iobus_softc)
103};
104
105static devclass_t openpic_psim_devclass;
106
107DRIVER_MODULE(openpic_psim, nexus, openpic_psim_driver, openpic_psim_devclass,
108    0, 0);
109
110static void
111openpic_psim_identify(driver_t *driver, device_t parent)
112{
113	device_t child;
114	phandle_t pic;
115
116	pic = OF_finddevice("/iobus/opic");
117	if (pic == -1)
118		return;
119
120	child = BUS_ADD_CHILD(parent, 0, "openpic", 0);
121	if (child != NULL)
122		nexus_set_device_type(child, "psim");
123}
124
125static int
126openpic_psim_probe(device_t dev)
127{
128	char    *name;
129	char	*type;
130
131	name = nexus_get_name(dev);
132	type = nexus_get_device_type(dev);
133
134	if (strcmp(name, "openpic") != 0 ||
135	    strcmp(type, "psim") != 0)
136		return (ENXIO);
137
138	device_set_desc(dev, OPENPIC_DEVSTR);
139	return (0);
140}
141
142static int
143openpic_psim_attach(device_t dev)
144{
145	KASSERT(ppicsoftc == NULL, ("iobus openpic: already probed"));
146	ppicsoftc = device_get_softc(dev);
147	ppicsoftc->sc_ndev = dev;
148
149	nexus_install_intcntlr(dev);
150	openpic_early_attach(dev);
151	return (0);
152}
153
154/*
155 * PSIM IOBus attachment
156 */
157static device_method_t  openpic_iobus_methods[] = {
158	/* Device interface */
159	DEVMETHOD(device_probe,		openpic_iobus_probe),
160	DEVMETHOD(device_attach,	openpic_iobus_attach),
161
162	{ 0, 0 },
163};
164
165static driver_t openpic_iobus_driver = {
166	"openpiciobus",
167	openpic_iobus_methods,
168	0
169};
170
171static devclass_t openpic_iobus_devclass;
172
173DRIVER_MODULE(openpiciobus, iobus, openpic_iobus_driver,
174    openpic_iobus_devclass, 0, 0);
175
176static int
177openpic_iobus_probe(device_t dev)
178{
179	char *name;
180
181	name = iobus_get_name(dev);
182	if (strcmp(name, "interrupt-controller") != 0)
183                return (ENXIO);
184
185	/*
186	 * The description was already printed out in the nexus
187	 * probe, so don't do it again here
188	 */
189	device_set_desc(dev, "OpenPIC IOBus interrupt cell");
190	if (!bootverbose)
191		device_quiet(dev);
192	return (0);
193}
194
195static int
196openpic_iobus_attach(device_t dev)
197{
198	struct openpic_iobus_softc *sc;
199	int rid;
200
201	sc = ppicsoftc;
202	KASSERT(sc != NULL, ("pic not nexus-probed\n"));
203
204	rid = 0;
205	sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
206	     RF_ACTIVE);
207
208	if (sc->sc_memr == NULL) {
209		device_printf(dev, "Could not alloc mem resource!\n");
210		return (ENXIO);
211	}
212
213	sc->osc.sc_psim = 1;
214	sc->osc.sc_bt = rman_get_bustag(sc->sc_memr);
215	sc->osc.sc_bh = rman_get_bushandle(sc->sc_memr);
216	sc->osc.sc_altdev = dev;
217
218	return (openpic_attach(sc->sc_ndev));
219}
220
221
222