openpic_iobus.c revision 131102
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 psim iobus attachment for the OpenPIC interrupt controller. 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/sys/powerpc/psim/openpic_iobus.c 131102 2004-06-25 13:42:48Z grehan $"); 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/module.h> 39#include <sys/bus.h> 40#include <sys/conf.h> 41#include <sys/kernel.h> 42 43#include <dev/ofw/openfirm.h> 44 45#include <machine/bus.h> 46#include <machine/intr.h> 47#include <machine/intr_machdep.h> 48#include <machine/md_var.h> 49#include <machine/nexusvar.h> 50#include <machine/pio.h> 51#include <machine/resource.h> 52 53#include <vm/vm.h> 54#include <vm/pmap.h> 55 56#include <sys/rman.h> 57 58#include <machine/openpicvar.h> 59#include <powerpc/psim/iobusvar.h> 60 61#include "pic_if.h" 62 63struct openpic_iobus_softc { 64 struct openpic_softc osc; 65 struct resource *sc_memr; /* iobus mem resource */ 66 device_t sc_ndev; /* nexus device */ 67}; 68 69static struct openpic_iobus_softc *ppicsoftc; 70 71/* 72 * MacIO interface 73 */ 74static void openpic_psim_identify(driver_t *, device_t); 75static int openpic_psim_probe(device_t); 76static int openpic_psim_attach(device_t); 77static int openpic_iobus_probe(device_t); 78static int openpic_iobus_attach(device_t); 79 80/* 81 * Nexus attachment 82 */ 83static device_method_t openpic_psim_methods[] = { 84 /* Device interface */ 85 DEVMETHOD(device_identify, openpic_psim_identify), 86 DEVMETHOD(device_probe, openpic_psim_probe), 87 DEVMETHOD(device_attach, openpic_psim_attach), 88 89 /* PIC interface */ 90 DEVMETHOD(pic_allocate_intr, openpic_allocate_intr), 91 DEVMETHOD(pic_setup_intr, openpic_setup_intr), 92 DEVMETHOD(pic_teardown_intr, openpic_teardown_intr), 93 DEVMETHOD(pic_release_intr, openpic_release_intr), 94 95 { 0, 0 } 96}; 97 98static driver_t openpic_psim_driver = { 99 "openpic", 100 openpic_psim_methods, 101 sizeof(struct openpic_iobus_softc) 102}; 103 104static devclass_t openpic_psim_devclass; 105 106DRIVER_MODULE(openpic_psim, nexus, openpic_psim_driver, openpic_psim_devclass, 107 0, 0); 108 109static void 110openpic_psim_identify(driver_t *driver, device_t parent) 111{ 112 device_t child; 113 phandle_t pic; 114 115 pic = OF_finddevice("/iobus/opic"); 116 if (pic == -1) 117 return; 118 119 child = BUS_ADD_CHILD(parent, 0, "openpic", 0); 120 if (child != NULL) 121 nexus_set_device_type(child, "psim"); 122} 123 124static int 125openpic_psim_probe(device_t dev) 126{ 127 char *name; 128 char *type; 129 130 name = nexus_get_name(dev); 131 type = nexus_get_device_type(dev); 132 133 if (strcmp(name, "openpic") != 0 || 134 strcmp(type, "psim") != 0) 135 return (ENXIO); 136 137 device_set_desc(dev, OPENPIC_DEVSTR); 138 return (0); 139} 140 141static int 142openpic_psim_attach(device_t dev) 143{ 144 KASSERT(ppicsoftc == NULL, ("iobus openpic: already probed")); 145 ppicsoftc = device_get_softc(dev); 146 ppicsoftc->sc_ndev = dev; 147 148 nexus_install_intcntlr(dev); 149 openpic_early_attach(dev); 150 return (0); 151} 152 153/* 154 * PSIM IOBus attachment 155 */ 156static device_method_t openpic_iobus_methods[] = { 157 /* Device interface */ 158 DEVMETHOD(device_probe, openpic_iobus_probe), 159 DEVMETHOD(device_attach, openpic_iobus_attach), 160 161 { 0, 0 }, 162}; 163 164static driver_t openpic_iobus_driver = { 165 "openpiciobus", 166 openpic_iobus_methods, 167 0 168}; 169 170static devclass_t openpic_iobus_devclass; 171 172DRIVER_MODULE(openpiciobus, iobus, openpic_iobus_driver, 173 openpic_iobus_devclass, 0, 0); 174 175static int 176openpic_iobus_probe(device_t dev) 177{ 178 char *name; 179 180 name = iobus_get_name(dev); 181 if (strcmp(name, "interrupt-controller") != 0) 182 return (ENXIO); 183 184 /* 185 * The description was already printed out in the nexus 186 * probe, so don't do it again here 187 */ 188 device_set_desc(dev, "OpenPIC IOBus interrupt cell"); 189 if (!bootverbose) 190 device_quiet(dev); 191 return (0); 192} 193 194static int 195openpic_iobus_attach(device_t dev) 196{ 197 struct openpic_iobus_softc *sc; 198 int rid; 199 200 sc = ppicsoftc; 201 KASSERT(sc != NULL, ("pic not nexus-probed\n")); 202 203 rid = 0; 204 sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 205 RF_ACTIVE); 206 207 if (sc->sc_memr == NULL) { 208 device_printf(dev, "Could not alloc mem resource!\n"); 209 return (ENXIO); 210 } 211 212 sc->osc.sc_psim = 1; 213 sc->osc.sc_bt = rman_get_bustag(sc->sc_memr); 214 sc->osc.sc_bh = rman_get_bushandle(sc->sc_memr); 215 sc->osc.sc_altdev = dev; 216 217 return (openpic_attach(sc->sc_ndev)); 218} 219 220 221