openpic_ofw.c revision 133589 
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 macio attachment for the OpenPIC interrupt controller.
31 * A nexus driver is defined so the number of interrupts can be
32 * determined early in the boot sequence before the hardware
33 * is accessed - the interrupt i/f is installed at this time,
34 * and when h/w is finally accessed, interrupt sources allocated
35 * prior to this are activated
36 */
37
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD: head/sys/powerpc/powermac/openpic_macio.c 133589 2004-08-12 17:41:33Z marius $");
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/module.h>
44#include <sys/bus.h>
45#include <sys/conf.h>
46#include <sys/kernel.h>
47
48#include <dev/ofw/ofw_bus.h>
49#include <dev/ofw/openfirm.h>
50
51#include <machine/bus.h>
52#include <machine/intr.h>
53#include <machine/intr_machdep.h>
54#include <machine/md_var.h>
55#include <machine/nexusvar.h>
56#include <machine/pio.h>
57#include <machine/resource.h>
58
59#include <vm/vm.h>
60#include <vm/pmap.h>
61
62#include <sys/rman.h>
63
64#include <machine/openpicvar.h>
65
66#include "pic_if.h"
67
68struct openpic_ofw_softc {
69	struct openpic_softc osc;
70	struct resource *sc_memr;	/* macio bus resource */
71	device_t	sc_ndev;	/* nexus device */
72};
73
74static struct openpic_ofw_softc *ofwpicsoftc;
75
76/*
77 * MacIO interface
78 */
79static void	openpic_ofw_identify(driver_t *, device_t);
80static int	openpic_ofw_probe(device_t);
81static int	openpic_ofw_attach(device_t);
82static int	openpic_macio_probe(device_t);
83static int	openpic_macio_attach(device_t);
84
85/*
86 * Nexus attachment
87 */
88static device_method_t  openpic_ofw_methods[] = {
89	/* Device interface */
90	DEVMETHOD(device_identify,	openpic_ofw_identify),
91	DEVMETHOD(device_probe,		openpic_ofw_probe),
92	DEVMETHOD(device_attach,	openpic_ofw_attach),
93
94	/* PIC interface */
95	DEVMETHOD(pic_allocate_intr,	openpic_allocate_intr),
96	DEVMETHOD(pic_setup_intr,	openpic_setup_intr),
97	DEVMETHOD(pic_teardown_intr,	openpic_teardown_intr),
98	DEVMETHOD(pic_release_intr,	openpic_release_intr),
99
100	{ 0, 0 }
101};
102
103static driver_t openpic_ofw_driver = {
104	"openpic",
105	openpic_ofw_methods,
106	sizeof(struct openpic_ofw_softc)
107};
108
109static devclass_t openpic_ofw_devclass;
110
111DRIVER_MODULE(openpic_ofw, nexus, openpic_ofw_driver, openpic_ofw_devclass,
112    0, 0);
113
114static void
115openpic_ofw_identify(driver_t *driver, device_t parent)
116{
117	device_t child;
118	phandle_t pic;
119	char type[40];
120
121	pic = OF_finddevice("mpic");
122	if (pic == -1)
123		return;
124
125	OF_getprop(pic, "device_type", type, sizeof(type));
126
127	if (strcmp(type, "open-pic") != 0)
128		return;
129
130	child = BUS_ADD_CHILD(parent, 0, "openpic", 0);
131	if (child != NULL)
132		nexus_set_device_type(child, "macio");
133}
134
135static int
136openpic_ofw_probe(device_t dev)
137{
138	char	*name;
139	char	*type;
140
141	name = nexus_get_name(dev);
142	type = nexus_get_device_type(dev);
143
144	if (strcmp(name, "openpic") != 0 ||
145	    strcmp(type, "macio") != 0)
146		return (ENXIO);
147
148	device_set_desc(dev, OPENPIC_DEVSTR);
149	return (0);
150}
151
152static int
153openpic_ofw_attach(device_t dev)
154{
155	KASSERT(ofwpicsoftc == NULL, ("ofw openpic: already probed"));
156	ofwpicsoftc = device_get_softc(dev);
157	ofwpicsoftc->sc_ndev = dev;
158
159	nexus_install_intcntlr(dev);
160	openpic_early_attach(dev);
161	return (0);
162}
163
164/*
165 * MacIO attachment
166 */
167static device_method_t  openpic_macio_methods[] = {
168	/* Device interface */
169	DEVMETHOD(device_probe,		openpic_macio_probe),
170	DEVMETHOD(device_attach,	openpic_macio_attach),
171
172	{ 0, 0 },
173};
174
175static driver_t openpic_macio_driver = {
176	"openpicmacio",
177	openpic_macio_methods,
178	0
179};
180
181static devclass_t openpic_macio_devclass;
182
183DRIVER_MODULE(openpicmacio, macio, openpic_macio_driver,
184    openpic_macio_devclass, 0, 0);
185
186static int
187openpic_macio_probe(device_t dev)
188{
189	const char *type = ofw_bus_get_type(dev);
190
191	if (strcmp(type, "open-pic") != 0)
192                return (ENXIO);
193
194	/*
195	 * The description was already printed out in the nexus
196	 * probe, so don't do it again here
197	 */
198	device_set_desc(dev, "OpenPIC MacIO interrupt cell");
199	if (!bootverbose)
200		device_quiet(dev);
201	return (0);
202}
203
204static int
205openpic_macio_attach(device_t dev)
206{
207	struct openpic_ofw_softc *sc;
208	int rid;
209
210	sc = ofwpicsoftc;
211	KASSERT(sc != NULL, ("pic not nexus-probed\n"));
212
213	rid = 0;
214	sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
215	     RF_ACTIVE);
216
217	if (sc->sc_memr == NULL) {
218		device_printf(dev, "Could not alloc mem resource!\n");
219		return (ENXIO);
220	}
221
222	sc->osc.sc_bt = rman_get_bustag(sc->sc_memr);
223	sc->osc.sc_bh = rman_get_bushandle(sc->sc_memr);
224	sc->osc.sc_altdev = dev;
225
226	return (openpic_attach(sc->sc_ndev));
227}
228
229
230