2 * Copyright 1998 Massachusetts Institute of Technology
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. All rights reserved.
32 * Redistribution and use in source and binary forms, with or without
33 * modification, are permitted provided that the following conditions
35 * 1. Redistributions of source code must retain the above copyright
36 * notice, this list of conditions and the following disclaimer.
37 * 2. Redistributions in binary form must reproduce the above copyright
38 * notice, this list of conditions and the following disclaimer in the
39 * documentation and/or other materials provided with the distribution.
41 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09
59 #include <sys/param.h>
60 #include <sys/systm.h>
61 #include <sys/module.h>
64 #include <sys/kernel.h>
65 #include <sys/malloc.h>
67 #include <dev/ofw/openfirm.h>
69 #include <machine/bus.h>
70 #include <machine/frame.h>
71 #include <machine/intr_machdep.h>
72 #include <machine/nexusvar.h>
73 #include <machine/resource.h>
80 * The nexus (which is a pseudo-bus actually) iterates over the nodes that
81 * exist in Open Firmware and adds them as devices to this bus so that drivers
82 * can be attached to them.
84 * Maybe this code should get into dev/ofw to some extent, as some of it should
85 * work for all Open Firmware based machines...
88 static MALLOC_DEFINE(M_NEXUS, "nexus", "nexus device information");
90 struct nexus_devinfo {
92 /* Some common properties. */
94 const char *ndi_device_type;
95 const char *ndi_compatible;
105 static int nexus_probe(device_t);
106 static void nexus_probe_nomatch(device_t, device_t);
111 static device_t nexus_add_child(device_t, int, const char *, int);
112 static int nexus_read_ivar(device_t, device_t, int, uintptr_t *);
113 static int nexus_write_ivar(device_t, device_t, int, uintptr_t);
114 static int nexus_setup_intr(device_t, device_t, struct resource *, int,
115 driver_filter_t *, driver_intr_t *, void *, void **);
116 static int nexus_teardown_intr(device_t, device_t, struct resource *,
118 static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
119 u_long, u_long, u_long, u_int);
120 static int nexus_activate_resource(device_t, device_t, int, int,
122 static int nexus_deactivate_resource(device_t, device_t, int, int,
124 static int nexus_release_resource(device_t, device_t, int, int,
130 static device_t nexus_device_from_node(device_t, phandle_t);
132 static device_method_t nexus_methods[] = {
133 /* Device interface */
134 DEVMETHOD(device_probe, nexus_probe),
135 DEVMETHOD(device_attach, bus_generic_attach),
136 DEVMETHOD(device_detach, bus_generic_detach),
137 DEVMETHOD(device_shutdown, bus_generic_shutdown),
138 DEVMETHOD(device_suspend, bus_generic_suspend),
139 DEVMETHOD(device_resume, bus_generic_resume),
141 /* Bus interface. Resource management is business of the children... */
142 DEVMETHOD(bus_add_child, nexus_add_child),
143 DEVMETHOD(bus_print_child, bus_generic_print_child),
144 DEVMETHOD(bus_probe_nomatch, nexus_probe_nomatch),
145 DEVMETHOD(bus_read_ivar, nexus_read_ivar),
146 DEVMETHOD(bus_write_ivar, nexus_write_ivar),
147 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
148 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
149 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
150 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
151 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
152 DEVMETHOD(bus_release_resource, nexus_release_resource),
157 static driver_t nexus_driver = {
160 sizeof(struct nexus_softc),
163 static devclass_t nexus_devclass;
165 DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
168 nexus_probe(device_t dev)
172 struct nexus_softc *sc;
174 if ((root = OF_peer(0)) == -1)
175 panic("nexus_probe: OF_peer failed.");
177 sc = device_get_softc(dev);
180 * Allow devices to identify
182 bus_generic_probe(dev);
185 * Now walk the OFW tree to locate top-level devices
187 for (child = OF_child(root); child != 0; child = OF_peer(child)) {
189 panic("nexus_probe(): OF_child failed.");
190 (void)nexus_device_from_node(dev, child);
193 device_set_desc(dev, "Open Firmware Nexus device");
198 nexus_probe_nomatch(device_t dev, device_t child)
202 if (BUS_READ_IVAR(dev, child, NEXUS_IVAR_NAME,
203 (uintptr_t *)&name) != 0 ||
204 BUS_READ_IVAR(dev, child, NEXUS_IVAR_DEVICE_TYPE,
205 (uintptr_t *)&type) != 0)
212 device_printf(dev, "<%s>, type %s (no driver attached)\n",
217 nexus_add_child(device_t dev, int order, const char *name, int unit)
220 struct nexus_devinfo *dinfo;
222 child = device_add_child_ordered(dev, order, name, unit);
226 dinfo = malloc(sizeof(struct nexus_devinfo), M_NEXUS, M_NOWAIT|M_ZERO);
230 dinfo->ndi_node = -1;
231 dinfo->ndi_name = name;
232 device_set_ivars(child, dinfo);
239 nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
241 struct nexus_devinfo *dinfo;
243 if ((dinfo = device_get_ivars(child)) == 0)
246 case NEXUS_IVAR_NODE:
247 *result = dinfo->ndi_node;
249 case NEXUS_IVAR_NAME:
250 *result = (uintptr_t)dinfo->ndi_name;
252 case NEXUS_IVAR_DEVICE_TYPE:
253 *result = (uintptr_t)dinfo->ndi_device_type;
255 case NEXUS_IVAR_COMPATIBLE:
256 *result = (uintptr_t)dinfo->ndi_compatible;
265 nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
267 struct nexus_devinfo *dinfo;
269 if ((dinfo = device_get_ivars(child)) == 0)
273 case NEXUS_IVAR_NAME:
276 /* Identified devices may want to set these */
277 case NEXUS_IVAR_NODE:
278 dinfo->ndi_node = (phandle_t)value;
281 case NEXUS_IVAR_DEVICE_TYPE:
282 dinfo->ndi_device_type = (char *)value;
292 nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags,
293 driver_filter_t *filter, driver_intr_t *intr, void *arg, void **cookiep)
295 struct nexus_softc *sc;
297 sc = device_get_softc(dev);
299 if (device_get_state(sc->sc_pic) != DS_ATTACHED)
300 panic("nexus_setup_intr: no pic attached\n");
302 return (PIC_SETUP_INTR(sc->sc_pic, child, res, flags, filter, intr,
307 nexus_teardown_intr(device_t dev, device_t child, struct resource *res,
310 struct nexus_softc *sc;
312 sc = device_get_softc(dev);
314 if (device_get_state(sc->sc_pic) != DS_ATTACHED)
315 panic("nexus_teardown_intr: no pic attached\n");
317 return (PIC_TEARDOWN_INTR(sc->sc_pic, child, res, ih));
321 * Allocate resources at the behest of a child. This only handles interrupts,
322 * since I/O resources are handled by child busses.
324 static struct resource *
325 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
326 u_long start, u_long end, u_long count, u_int flags)
328 struct nexus_softc *sc;
331 sc = device_get_softc(bus);
333 if (type != SYS_RES_IRQ) {
334 device_printf(bus, "unknown resource request from %s\n",
335 device_get_nameunit(child));
339 if (device_get_state(sc->sc_pic) != DS_ATTACHED)
340 panic("nexus_alloc_resource: no pic attached\n");
342 rv = PIC_ALLOCATE_INTR(sc->sc_pic, child, rid, start, flags);
348 nexus_activate_resource(device_t bus, device_t child, int type, int rid,
349 struct resource *res)
352 /* Not much to be done yet... */
353 return (rman_activate_resource(res));
357 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
358 struct resource *res)
361 /* Not much to be done yet... */
362 return (rman_deactivate_resource(res));
366 nexus_release_resource(device_t bus, device_t child, int type, int rid,
367 struct resource *res)
369 struct nexus_softc *sc;
371 sc = device_get_softc(bus);
373 if (type != SYS_RES_IRQ) {
374 device_printf(bus, "unknown resource request from %s\n",
375 device_get_nameunit(child));
379 if (device_get_state(sc->sc_pic) != DS_ATTACHED)
380 panic("nexus_release_resource: no pic attached\n");
382 return (PIC_RELEASE_INTR(sc->sc_pic, child, rid, res));
386 nexus_device_from_node(device_t parent, phandle_t node)
389 struct nexus_devinfo *dinfo;
390 char *name, *type, *compatible;
392 OF_getprop_alloc(node, "name", 1, (void **)&name);
393 OF_getprop_alloc(node, "device_type", 1, (void **)&type);
394 OF_getprop_alloc(node, "compatible", 1, (void **)&compatible);
395 cdev = device_add_child(parent, NULL, -1);
397 dinfo = malloc(sizeof(*dinfo), M_NEXUS, M_WAITOK);
398 dinfo->ndi_node = node;
399 dinfo->ndi_name = name;
400 dinfo->ndi_device_type = type;
401 dinfo->ndi_compatible = compatible;
402 device_set_ivars(cdev, dinfo);
404 free(name, M_OFWPROP);
410 nexus_install_intcntlr(device_t dev)
412 struct nexus_softc *sc;
414 sc = device_get_softc(device_get_parent(dev));