/* * 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 "opt_psim.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pic_if.h" /* * 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; char *ndi_compatible; }; struct nexus_softc { device_t sc_pic; }; /* * Device interface */ static int nexus_probe(device_t); static void nexus_probe_nomatch(device_t, device_t); /* * Bus interface */ 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 int nexus_setup_intr(device_t, device_t, struct resource *, int, driver_intr_t *, void *, void **); static int nexus_teardown_intr(device_t, device_t, struct resource *, void *); static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, u_long, u_long, u_long, u_int); static int nexus_activate_resource(device_t, device_t, int, int, struct resource *); static int nexus_deactivate_resource(device_t, device_t, int, int, struct resource *); static int nexus_release_resource(device_t, device_t, int, int, struct resource *); /* * Local routines */ static device_t create_device_from_node(device_t, phandle_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), DEVMETHOD(bus_setup_intr, nexus_setup_intr), DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), DEVMETHOD(bus_activate_resource, nexus_activate_resource), DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), DEVMETHOD(bus_release_resource, nexus_release_resource), { 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 pic, cpus, child, new_node, temp_node; struct nexus_softc *sc; if ((root = OF_peer(0)) == -1) panic("nexus_probe: OF_peer failed."); sc = device_get_softc(dev); if ((cpus = OF_finddevice("/cpus")) != -1) { for (child = OF_child(cpus); child; child = OF_peer(child)) (void)create_device_from_node(dev, child); } if ((child = OF_finddevice("/chosen")) == -1) printf("nexus_probe: can't find /chosen"); if (OF_getprop(child, "interrupt-controller", &pic, 4) != 4) #ifndef PSIM printf("nexus_probe: can't get interrupt-controller"); #else pic = OF_finddevice("/iobus/opic"); #endif sc->sc_pic = create_device_from_node(dev, pic); if (sc->sc_pic == NULL) printf("nexus_probe: failed to create PIC device"); child = root; while (child != 0) { if (child != pic) (void)create_device_from_node(dev, child); if (child == cpus) new_node = 0; else new_node = OF_child(child); if (new_node == -1) panic("nexus_probe: OF_child returned -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; case NEXUS_IVAR_COMPATIBLE: *result = (uintptr_t)dinfo->ndi_compatible; 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; } static int nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags, driver_intr_t *intr, void *arg, void **cookiep) { struct nexus_softc *sc; sc = device_get_softc(dev); if (device_get_state(sc->sc_pic) != DS_ATTACHED) panic("nexus_setup_intr: no pic attached\n"); return (PIC_SETUP_INTR(sc->sc_pic, child, res, flags, intr, arg, cookiep)); } static int nexus_teardown_intr(device_t dev, device_t child, struct resource *res, void *ih) { struct nexus_softc *sc; sc = device_get_softc(dev); if (device_get_state(sc->sc_pic) != DS_ATTACHED) panic("nexus_teardown_intr: no pic attached\n"); return (PIC_TEARDOWN_INTR(sc->sc_pic, child, res, ih)); } /* * Allocate resources at the behest of a child. This only handles interrupts, * since I/O resources are handled by child busses. */ static struct resource * nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, u_long start, u_long end, u_long count, u_int flags) { struct nexus_softc *sc; struct resource *rv; sc = device_get_softc(bus); if (type != SYS_RES_IRQ) { device_printf(bus, "unknown resource request from %s\n", device_get_nameunit(child)); return (NULL); } if (device_get_state(sc->sc_pic) != DS_ATTACHED) panic("nexus_alloc_resource: no pic attached\n"); rv = PIC_ALLOCATE_INTR(sc->sc_pic, child, rid, start, flags); return (rv); } static int nexus_activate_resource(device_t bus, device_t child, int type, int rid, struct resource *res) { /* Not much to be done yet... */ return (rman_activate_resource(res)); } static int nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, struct resource *res) { /* Not much to be done yet... */ return (rman_deactivate_resource(res)); } static int nexus_release_resource(device_t bus, device_t child, int type, int rid, struct resource *res) { struct nexus_softc *sc; sc = device_get_softc(bus); if (type != SYS_RES_IRQ) { device_printf(bus, "unknown resource request from %s\n", device_get_nameunit(child)); return (NULL); } if (device_get_state(sc->sc_pic) != DS_ATTACHED) panic("nexus_release_resource: no pic attached\n"); return (PIC_RELEASE_INTR(sc->sc_pic, child, rid, res)); } static device_t create_device_from_node(device_t parent, phandle_t node) { device_t cdev; struct nexus_devinfo *dinfo; char *name, *type, *compatible; OF_getprop_alloc(node, "name", 1, (void **)&name); OF_getprop_alloc(node, "device_type", 1, (void **)&type); OF_getprop_alloc(node, "compatible", 1, (void **)&compatible); cdev = device_add_child(parent, NULL, -1); if (cdev != NULL) { dinfo = malloc(sizeof(*dinfo), M_NEXUS, M_WAITOK); dinfo->ndi_node = node; dinfo->ndi_name = name; dinfo->ndi_device_type = type; dinfo->ndi_compatible = compatible; device_set_ivars(cdev, dinfo); } else free(name, M_OFWPROP); return (cdev); }