/* * Copyright 1998 Massachusetts Institute of Technology * * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby * granted, provided that both the above copyright notice and this * permission notice appear in all copies, that both the above * copyright notice and this permission notice appear in all * supporting documentation, and that the name of M.I.T. not be used * in advertising or publicity pertaining to distribution of the * software without specific, written prior permission. M.I.T. makes * no representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied * warranty. * * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /*- * Copyright 2001 by Thomas Moestl . All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09 * * $FreeBSD$ */ #include #include #include #include #include #include #include #include #include #include #include /* * The nexus (which is a pseudo-bus actually) iterates over the nodes that * exist in OpenFirmware and adds them as devices to this bus so that drivers * can be attached to them. * * Maybe this code should get into dev/ofw to some extent, as some of it should * work for all OpenFirmware based machines... */ static MALLOC_DEFINE(M_NEXUS, "nexus", "nexus device information"); struct nexus_devinfo { phandle_t ndi_node; /* Some common properties. */ char *ndi_name; char *ndi_device_type; }; struct nexus_softc { }; static int nexus_probe(device_t); static void nexus_probe_nomatch(device_t, device_t); static int nexus_read_ivar(device_t, device_t, int, uintptr_t *); static int nexus_write_ivar(device_t, device_t, int, uintptr_t); static device_method_t nexus_methods[] = { /* Device interface */ DEVMETHOD(device_probe, nexus_probe), DEVMETHOD(device_attach, bus_generic_attach), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), /* Bus interface. Resource management is business of the children... */ DEVMETHOD(bus_print_child, bus_generic_print_child), DEVMETHOD(bus_probe_nomatch, nexus_probe_nomatch), DEVMETHOD(bus_read_ivar, nexus_read_ivar), DEVMETHOD(bus_write_ivar, nexus_write_ivar), { 0, 0 } }; static driver_t nexus_driver = { "nexus", nexus_methods, sizeof(struct nexus_softc), }; static devclass_t nexus_devclass; DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); static int nexus_probe(device_t dev) { phandle_t root; phandle_t child, new_node, temp_node; device_t cdev; struct nexus_devinfo *dinfo; struct nexus_softc *sc; char *name, *type; if ((root = OF_peer(0)) == -1) panic("nexus_probe: OF_peer failed."); child = root; while (child != 0) { OF_getprop_alloc(child, "name", 1, (void **)&name); OF_getprop_alloc(child, "device_type", 1, (void **)&type); cdev = device_add_child(dev, NULL, -1); if (cdev != NULL) { dinfo = malloc(sizeof(*dinfo), M_NEXUS, M_WAITOK); dinfo->ndi_node = child; dinfo->ndi_name = name; dinfo->ndi_device_type = type; device_set_ivars(cdev, dinfo); } else free(name, M_OFWPROP); next: new_node = OF_child(child); if (new_node == -1) panic("nexus_probe: OF_child return -1"); if (new_node == 0) new_node = OF_peer(child); if (new_node == 0) { temp_node = child; while (new_node == 0) { temp_node = OF_parent(temp_node); if (temp_node == 0) break; new_node = OF_peer(temp_node); } } child = new_node; } device_set_desc(dev, "OpenFirmware Nexus device"); return (0); } static void nexus_probe_nomatch(device_t dev, device_t child) { char *name, *type; if (BUS_READ_IVAR(dev, child, NEXUS_IVAR_NAME, (uintptr_t *)&name) != 0 || BUS_READ_IVAR(dev, child, NEXUS_IVAR_DEVICE_TYPE, (uintptr_t *)&type) != 0) return; if (type == NULL) type = "(unknown)"; #if 0 device_printf(dev, "<%s>, type %s (no driver attached)\n", name, type); #endif } static int nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) { struct nexus_devinfo *dinfo; if ((dinfo = device_get_ivars(child)) == 0) return (ENOENT); switch (which) { case NEXUS_IVAR_NODE: *result = dinfo->ndi_node; break; case NEXUS_IVAR_NAME: *result = (uintptr_t)dinfo->ndi_name; break; case NEXUS_IVAR_DEVICE_TYPE: *result = (uintptr_t)dinfo->ndi_device_type; break; default: return (ENOENT); } return 0; } static int nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) { struct nexus_devinfo *dinfo; if ((dinfo = device_get_ivars(child)) == 0) return (ENOENT); switch (which) { case NEXUS_IVAR_NODE: case NEXUS_IVAR_NAME: case NEXUS_IVAR_DEVICE_TYPE: return (EINVAL); default: return (ENOENT); } return 0; }