openpic_ofw.c revision 133589
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 macio attachment for the OpenPIC interrupt controller. 31 * A nexus driver is defined so the number of interrupts can be 32 * determined early in the boot sequence before the hardware 33 * is accessed - the interrupt i/f is installed at this time, 34 * and when h/w is finally accessed, interrupt sources allocated 35 * prior to this are activated 36 */ 37 38#include <sys/cdefs.h> 39__FBSDID("$FreeBSD: head/sys/powerpc/powermac/openpic_macio.c 133589 2004-08-12 17:41:33Z marius $"); 40 41#include <sys/param.h> 42#include <sys/systm.h> 43#include <sys/module.h> 44#include <sys/bus.h> 45#include <sys/conf.h> 46#include <sys/kernel.h> 47 48#include <dev/ofw/ofw_bus.h> 49#include <dev/ofw/openfirm.h> 50 51#include <machine/bus.h> 52#include <machine/intr.h> 53#include <machine/intr_machdep.h> 54#include <machine/md_var.h> 55#include <machine/nexusvar.h> 56#include <machine/pio.h> 57#include <machine/resource.h> 58 59#include <vm/vm.h> 60#include <vm/pmap.h> 61 62#include <sys/rman.h> 63 64#include <machine/openpicvar.h> 65 66#include "pic_if.h" 67 68struct openpic_ofw_softc { 69 struct openpic_softc osc; 70 struct resource *sc_memr; /* macio bus resource */ 71 device_t sc_ndev; /* nexus device */ 72}; 73 74static struct openpic_ofw_softc *ofwpicsoftc; 75 76/* 77 * MacIO interface 78 */ 79static void openpic_ofw_identify(driver_t *, device_t); 80static int openpic_ofw_probe(device_t); 81static int openpic_ofw_attach(device_t); 82static int openpic_macio_probe(device_t); 83static int openpic_macio_attach(device_t); 84 85/* 86 * Nexus attachment 87 */ 88static device_method_t openpic_ofw_methods[] = { 89 /* Device interface */ 90 DEVMETHOD(device_identify, openpic_ofw_identify), 91 DEVMETHOD(device_probe, openpic_ofw_probe), 92 DEVMETHOD(device_attach, openpic_ofw_attach), 93 94 /* PIC interface */ 95 DEVMETHOD(pic_allocate_intr, openpic_allocate_intr), 96 DEVMETHOD(pic_setup_intr, openpic_setup_intr), 97 DEVMETHOD(pic_teardown_intr, openpic_teardown_intr), 98 DEVMETHOD(pic_release_intr, openpic_release_intr), 99 100 { 0, 0 } 101}; 102 103static driver_t openpic_ofw_driver = { 104 "openpic", 105 openpic_ofw_methods, 106 sizeof(struct openpic_ofw_softc) 107}; 108 109static devclass_t openpic_ofw_devclass; 110 111DRIVER_MODULE(openpic_ofw, nexus, openpic_ofw_driver, openpic_ofw_devclass, 112 0, 0); 113 114static void 115openpic_ofw_identify(driver_t *driver, device_t parent) 116{ 117 device_t child; 118 phandle_t pic; 119 char type[40]; 120 121 pic = OF_finddevice("mpic"); 122 if (pic == -1) 123 return; 124 125 OF_getprop(pic, "device_type", type, sizeof(type)); 126 127 if (strcmp(type, "open-pic") != 0) 128 return; 129 130 child = BUS_ADD_CHILD(parent, 0, "openpic", 0); 131 if (child != NULL) 132 nexus_set_device_type(child, "macio"); 133} 134 135static int 136openpic_ofw_probe(device_t dev) 137{ 138 char *name; 139 char *type; 140 141 name = nexus_get_name(dev); 142 type = nexus_get_device_type(dev); 143 144 if (strcmp(name, "openpic") != 0 || 145 strcmp(type, "macio") != 0) 146 return (ENXIO); 147 148 device_set_desc(dev, OPENPIC_DEVSTR); 149 return (0); 150} 151 152static int 153openpic_ofw_attach(device_t dev) 154{ 155 KASSERT(ofwpicsoftc == NULL, ("ofw openpic: already probed")); 156 ofwpicsoftc = device_get_softc(dev); 157 ofwpicsoftc->sc_ndev = dev; 158 159 nexus_install_intcntlr(dev); 160 openpic_early_attach(dev); 161 return (0); 162} 163 164/* 165 * MacIO attachment 166 */ 167static device_method_t openpic_macio_methods[] = { 168 /* Device interface */ 169 DEVMETHOD(device_probe, openpic_macio_probe), 170 DEVMETHOD(device_attach, openpic_macio_attach), 171 172 { 0, 0 }, 173}; 174 175static driver_t openpic_macio_driver = { 176 "openpicmacio", 177 openpic_macio_methods, 178 0 179}; 180 181static devclass_t openpic_macio_devclass; 182 183DRIVER_MODULE(openpicmacio, macio, openpic_macio_driver, 184 openpic_macio_devclass, 0, 0); 185 186static int 187openpic_macio_probe(device_t dev) 188{ 189 const char *type = ofw_bus_get_type(dev); 190 191 if (strcmp(type, "open-pic") != 0) 192 return (ENXIO); 193 194 /* 195 * The description was already printed out in the nexus 196 * probe, so don't do it again here 197 */ 198 device_set_desc(dev, "OpenPIC MacIO interrupt cell"); 199 if (!bootverbose) 200 device_quiet(dev); 201 return (0); 202} 203 204static int 205openpic_macio_attach(device_t dev) 206{ 207 struct openpic_ofw_softc *sc; 208 int rid; 209 210 sc = ofwpicsoftc; 211 KASSERT(sc != NULL, ("pic not nexus-probed\n")); 212 213 rid = 0; 214 sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 215 RF_ACTIVE); 216 217 if (sc->sc_memr == NULL) { 218 device_printf(dev, "Could not alloc mem resource!\n"); 219 return (ENXIO); 220 } 221 222 sc->osc.sc_bt = rman_get_bustag(sc->sc_memr); 223 sc->osc.sc_bh = rman_get_bushandle(sc->sc_memr); 224 sc->osc.sc_altdev = dev; 225 226 return (openpic_attach(sc->sc_ndev)); 227} 228 229 230