openpic_ofw.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 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 131400 2004-07-01 07:59:08Z grehan $");
40
41#define __RMAN_RESOURCE_VISIBLE
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/module.h>
45#include <sys/bus.h>
46#include <sys/conf.h>
47#include <sys/kernel.h>
48
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#include <powerpc/powermac/maciovar.h>
66
67#include "pic_if.h"
68
69struct openpic_ofw_softc {
70	struct openpic_softc osc;
71	struct resource *sc_memr;	/* macio bus resource */
72	device_t	sc_ndev;	/* nexus device */
73};
74
75static struct openpic_ofw_softc *ofwpicsoftc;
76
77/*
78 * MacIO interface
79 */
80static void	openpic_ofw_identify(driver_t *, device_t);
81static int	openpic_ofw_probe(device_t);
82static int	openpic_ofw_attach(device_t);
83static int	openpic_macio_probe(device_t);
84static int	openpic_macio_attach(device_t);
85
86/*
87 * Nexus attachment
88 */
89static device_method_t  openpic_ofw_methods[] = {
90	/* Device interface */
91	DEVMETHOD(device_identify,	openpic_ofw_identify),
92	DEVMETHOD(device_probe,		openpic_ofw_probe),
93	DEVMETHOD(device_attach,	openpic_ofw_attach),
94
95	/* PIC interface */
96	DEVMETHOD(pic_allocate_intr,	openpic_allocate_intr),
97	DEVMETHOD(pic_setup_intr,	openpic_setup_intr),
98	DEVMETHOD(pic_teardown_intr,	openpic_teardown_intr),
99	DEVMETHOD(pic_release_intr,	openpic_release_intr),
100
101	{ 0, 0 }
102};
103
104static driver_t openpic_ofw_driver = {
105	"openpic",
106	openpic_ofw_methods,
107	sizeof(struct openpic_ofw_softc)
108};
109
110static devclass_t openpic_ofw_devclass;
111
112DRIVER_MODULE(openpic_ofw, nexus, openpic_ofw_driver, openpic_ofw_devclass,
113    0, 0);
114
115static void
116openpic_ofw_identify(driver_t *driver, device_t parent)
117{
118	device_t child;
119	phandle_t pic;
120	char type[40];
121
122	pic = OF_finddevice("mpic");
123	if (pic == -1)
124		return;
125
126	OF_getprop(pic, "device_type", type, sizeof(type));
127
128	if (strcmp(type, "open-pic") != 0)
129		return;
130
131	child = BUS_ADD_CHILD(parent, 0, "openpic", 0);
132	if (child != NULL)
133		nexus_set_device_type(child, "macio");
134}
135
136static int
137openpic_ofw_probe(device_t dev)
138{
139	char	*name;
140	char	*type;
141
142	name = nexus_get_name(dev);
143	type = nexus_get_device_type(dev);
144
145	if (strcmp(name, "openpic") != 0 ||
146	    strcmp(type, "macio") != 0)
147		return (ENXIO);
148
149	device_set_desc(dev, OPENPIC_DEVSTR);
150	return (0);
151}
152
153static int
154openpic_ofw_attach(device_t dev)
155{
156	KASSERT(ofwpicsoftc == NULL, ("ofw openpic: already probed"));
157	ofwpicsoftc = device_get_softc(dev);
158	ofwpicsoftc->sc_ndev = dev;
159
160	nexus_install_intcntlr(dev);
161	openpic_early_attach(dev);
162	return (0);
163}
164
165/*
166 * MacIO attachment
167 */
168static device_method_t  openpic_macio_methods[] = {
169	/* Device interface */
170	DEVMETHOD(device_probe,		openpic_macio_probe),
171	DEVMETHOD(device_attach,	openpic_macio_attach),
172
173	{ 0, 0 },
174};
175
176static driver_t openpic_macio_driver = {
177	"openpicmacio",
178	openpic_macio_methods,
179	0
180};
181
182static devclass_t openpic_macio_devclass;
183
184DRIVER_MODULE(openpicmacio, macio, openpic_macio_driver,
185    openpic_macio_devclass, 0, 0);
186
187static int
188openpic_macio_probe(device_t dev)
189{
190	char *type = macio_get_devtype(dev);
191
192	if (strcmp(type, "open-pic") != 0)
193                return (ENXIO);
194
195	/*
196	 * The description was already printed out in the nexus
197	 * probe, so don't do it again here
198	 */
199	device_set_desc(dev, "OpenPIC MacIO interrupt cell");
200	if (!bootverbose)
201		device_quiet(dev);
202	return (0);
203}
204
205static int
206openpic_macio_attach(device_t dev)
207{
208	struct openpic_ofw_softc *sc;
209	int rid;
210
211	sc = ofwpicsoftc;
212	KASSERT(sc != NULL, ("pic not nexus-probed\n"));
213
214	rid = 0;
215	sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
216	     RF_ACTIVE);
217
218	if (sc->sc_memr == NULL) {
219		device_printf(dev, "Could not alloc mem resource!\n");
220		return (ENXIO);
221	}
222
223	sc->osc.sc_bt = rman_get_bustag(sc->sc_memr);
224	sc->osc.sc_bh = rman_get_bushandle(sc->sc_memr);
225	sc->osc.sc_altdev = dev;
226
227	return (openpic_attach(sc->sc_ndev));
228}
229
230
231