openpic_iobus.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 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 131400 2004-07-01 07:59:08Z grehan $"); 35 36#define __RMAN_RESOURCE_VISIBLE 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/module.h> 40#include <sys/bus.h> 41#include <sys/conf.h> 42#include <sys/kernel.h> 43 44#include <dev/ofw/openfirm.h> 45 46#include <machine/bus.h> 47#include <machine/intr.h> 48#include <machine/intr_machdep.h> 49#include <machine/md_var.h> 50#include <machine/nexusvar.h> 51#include <machine/pio.h> 52#include <machine/resource.h> 53 54#include <vm/vm.h> 55#include <vm/pmap.h> 56 57#include <sys/rman.h> 58 59#include <machine/openpicvar.h> 60#include <powerpc/psim/iobusvar.h> 61 62#include "pic_if.h" 63 64struct openpic_iobus_softc { 65 struct openpic_softc osc; 66 struct resource *sc_memr; /* iobus mem resource */ 67 device_t sc_ndev; /* nexus device */ 68}; 69 70static struct openpic_iobus_softc *ppicsoftc; 71 72/* 73 * MacIO interface 74 */ 75static void openpic_psim_identify(driver_t *, device_t); 76static int openpic_psim_probe(device_t); 77static int openpic_psim_attach(device_t); 78static int openpic_iobus_probe(device_t); 79static int openpic_iobus_attach(device_t); 80 81/* 82 * Nexus attachment 83 */ 84static device_method_t openpic_psim_methods[] = { 85 /* Device interface */ 86 DEVMETHOD(device_identify, openpic_psim_identify), 87 DEVMETHOD(device_probe, openpic_psim_probe), 88 DEVMETHOD(device_attach, openpic_psim_attach), 89 90 /* PIC interface */ 91 DEVMETHOD(pic_allocate_intr, openpic_allocate_intr), 92 DEVMETHOD(pic_setup_intr, openpic_setup_intr), 93 DEVMETHOD(pic_teardown_intr, openpic_teardown_intr), 94 DEVMETHOD(pic_release_intr, openpic_release_intr), 95 96 { 0, 0 } 97}; 98 99static driver_t openpic_psim_driver = { 100 "openpic", 101 openpic_psim_methods, 102 sizeof(struct openpic_iobus_softc) 103}; 104 105static devclass_t openpic_psim_devclass; 106 107DRIVER_MODULE(openpic_psim, nexus, openpic_psim_driver, openpic_psim_devclass, 108 0, 0); 109 110static void 111openpic_psim_identify(driver_t *driver, device_t parent) 112{ 113 device_t child; 114 phandle_t pic; 115 116 pic = OF_finddevice("/iobus/opic"); 117 if (pic == -1) 118 return; 119 120 child = BUS_ADD_CHILD(parent, 0, "openpic", 0); 121 if (child != NULL) 122 nexus_set_device_type(child, "psim"); 123} 124 125static int 126openpic_psim_probe(device_t dev) 127{ 128 char *name; 129 char *type; 130 131 name = nexus_get_name(dev); 132 type = nexus_get_device_type(dev); 133 134 if (strcmp(name, "openpic") != 0 || 135 strcmp(type, "psim") != 0) 136 return (ENXIO); 137 138 device_set_desc(dev, OPENPIC_DEVSTR); 139 return (0); 140} 141 142static int 143openpic_psim_attach(device_t dev) 144{ 145 KASSERT(ppicsoftc == NULL, ("iobus openpic: already probed")); 146 ppicsoftc = device_get_softc(dev); 147 ppicsoftc->sc_ndev = dev; 148 149 nexus_install_intcntlr(dev); 150 openpic_early_attach(dev); 151 return (0); 152} 153 154/* 155 * PSIM IOBus attachment 156 */ 157static device_method_t openpic_iobus_methods[] = { 158 /* Device interface */ 159 DEVMETHOD(device_probe, openpic_iobus_probe), 160 DEVMETHOD(device_attach, openpic_iobus_attach), 161 162 { 0, 0 }, 163}; 164 165static driver_t openpic_iobus_driver = { 166 "openpiciobus", 167 openpic_iobus_methods, 168 0 169}; 170 171static devclass_t openpic_iobus_devclass; 172 173DRIVER_MODULE(openpiciobus, iobus, openpic_iobus_driver, 174 openpic_iobus_devclass, 0, 0); 175 176static int 177openpic_iobus_probe(device_t dev) 178{ 179 char *name; 180 181 name = iobus_get_name(dev); 182 if (strcmp(name, "interrupt-controller") != 0) 183 return (ENXIO); 184 185 /* 186 * The description was already printed out in the nexus 187 * probe, so don't do it again here 188 */ 189 device_set_desc(dev, "OpenPIC IOBus interrupt cell"); 190 if (!bootverbose) 191 device_quiet(dev); 192 return (0); 193} 194 195static int 196openpic_iobus_attach(device_t dev) 197{ 198 struct openpic_iobus_softc *sc; 199 int rid; 200 201 sc = ppicsoftc; 202 KASSERT(sc != NULL, ("pic not nexus-probed\n")); 203 204 rid = 0; 205 sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 206 RF_ACTIVE); 207 208 if (sc->sc_memr == NULL) { 209 device_printf(dev, "Could not alloc mem resource!\n"); 210 return (ENXIO); 211 } 212 213 sc->osc.sc_psim = 1; 214 sc->osc.sc_bt = rman_get_bustag(sc->sc_memr); 215 sc->osc.sc_bh = rman_get_bushandle(sc->sc_memr); 216 sc->osc.sc_altdev = dev; 217 218 return (openpic_attach(sc->sc_ndev)); 219} 220 221 222