central.c revision 200874
1/*- 2 * Copyright (c) 2003 Jake Burkholder. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/sparc64/central/central.c 200874 2009-12-22 21:02:46Z marius $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/bus.h> 33#include <sys/kernel.h> 34#include <sys/malloc.h> 35#include <sys/module.h> 36 37#include <dev/ofw/ofw_bus.h> 38#include <dev/ofw/ofw_bus_subr.h> 39#include <dev/ofw/openfirm.h> 40 41#include <machine/bus.h> 42#include <machine/resource.h> 43 44#include <sys/rman.h> 45 46#include <sparc64/sbus/ofw_sbus.h> 47 48struct central_devinfo { 49 struct ofw_bus_devinfo cdi_obdinfo; 50 struct resource_list cdi_rl; 51}; 52 53struct central_softc { 54 int sc_nrange; 55 struct sbus_ranges *sc_ranges; 56}; 57 58static device_probe_t central_probe; 59static device_attach_t central_attach; 60static bus_print_child_t central_print_child; 61static bus_probe_nomatch_t central_probe_nomatch; 62static bus_alloc_resource_t central_alloc_resource; 63static bus_get_resource_list_t central_get_resource_list; 64static ofw_bus_get_devinfo_t central_get_devinfo; 65 66static int central_print_res(struct central_devinfo *); 67 68static device_method_t central_methods[] = { 69 /* Device interface */ 70 DEVMETHOD(device_probe, central_probe), 71 DEVMETHOD(device_attach, central_attach), 72 DEVMETHOD(device_shutdown, bus_generic_shutdown), 73 DEVMETHOD(device_suspend, bus_generic_suspend), 74 DEVMETHOD(device_resume, bus_generic_resume), 75 76 /* Bus interface */ 77 DEVMETHOD(bus_print_child, central_print_child), 78 DEVMETHOD(bus_probe_nomatch, central_probe_nomatch), 79 DEVMETHOD(bus_alloc_resource, central_alloc_resource), 80 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 81 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 82 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 83 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 84 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 85 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 86 DEVMETHOD(bus_get_resource_list, central_get_resource_list), 87 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str), 88 89 /* ofw_bus interface */ 90 DEVMETHOD(ofw_bus_get_devinfo, central_get_devinfo), 91 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 92 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 93 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 94 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 95 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 96 97 KOBJMETHOD_END 98}; 99 100static driver_t central_driver = { 101 "central", 102 central_methods, 103 sizeof(struct central_softc), 104}; 105 106static devclass_t central_devclass; 107 108EARLY_DRIVER_MODULE(central, nexus, central_driver, central_devclass, 0, 0, 109 BUS_PASS_BUS); 110MODULE_DEPEND(fhc, nexus, 1, 1, 1); 111MODULE_VERSION(central, 1); 112 113static int 114central_probe(device_t dev) 115{ 116 117 if (strcmp(ofw_bus_get_name(dev), "central") == 0) { 118 device_set_desc(dev, "central"); 119 return (0); 120 } 121 return (ENXIO); 122} 123 124static int 125central_attach(device_t dev) 126{ 127 struct central_devinfo *cdi; 128 struct sbus_regs *reg; 129 struct central_softc *sc; 130 phandle_t child; 131 phandle_t node; 132 device_t cdev; 133 int nreg; 134 int i; 135 136 sc = device_get_softc(dev); 137 node = ofw_bus_get_node(dev); 138 139 sc->sc_nrange = OF_getprop_alloc(node, "ranges", 140 sizeof(*sc->sc_ranges), (void **)&sc->sc_ranges); 141 if (sc->sc_nrange == -1) { 142 device_printf(dev, "can't get ranges\n"); 143 return (ENXIO); 144 } 145 146 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 147 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO); 148 if (ofw_bus_gen_setup_devinfo(&cdi->cdi_obdinfo, child) != 0) { 149 free(cdi, M_DEVBUF); 150 continue; 151 } 152 nreg = OF_getprop_alloc(child, "reg", sizeof(*reg), 153 (void **)®); 154 if (nreg == -1) { 155 device_printf(dev, "<%s>: incomplete\n", 156 cdi->cdi_obdinfo.obd_name); 157 ofw_bus_gen_destroy_devinfo(&cdi->cdi_obdinfo); 158 free(cdi, M_DEVBUF); 159 continue; 160 } 161 resource_list_init(&cdi->cdi_rl); 162 for (i = 0; i < nreg; i++) 163 resource_list_add(&cdi->cdi_rl, SYS_RES_MEMORY, i, 164 reg[i].sbr_offset, reg[i].sbr_offset + 165 reg[i].sbr_size, reg[i].sbr_size); 166 free(reg, M_OFWPROP); 167 cdev = device_add_child(dev, NULL, -1); 168 if (cdev == NULL) { 169 device_printf(dev, "<%s>: device_add_child failed\n", 170 cdi->cdi_obdinfo.obd_name); 171 resource_list_free(&cdi->cdi_rl); 172 ofw_bus_gen_destroy_devinfo(&cdi->cdi_obdinfo); 173 free(cdi, M_DEVBUF); 174 continue; 175 } 176 device_set_ivars(cdev, cdi); 177 } 178 179 return (bus_generic_attach(dev)); 180} 181 182static int 183central_print_child(device_t dev, device_t child) 184{ 185 int rv; 186 187 rv = bus_print_child_header(dev, child); 188 rv += central_print_res(device_get_ivars(child)); 189 rv += bus_print_child_footer(dev, child); 190 return (rv); 191} 192 193static void 194central_probe_nomatch(device_t dev, device_t child) 195{ 196 const char *type; 197 198 device_printf(dev, "<%s>", ofw_bus_get_name(child)); 199 central_print_res(device_get_ivars(child)); 200 type = ofw_bus_get_type(child); 201 printf(" type %s (no driver attached)\n", 202 type != NULL ? type : "unknown"); 203} 204 205static struct resource * 206central_alloc_resource(device_t bus, device_t child, int type, int *rid, 207 u_long start, u_long end, u_long count, u_int flags) 208{ 209 struct resource_list *rl; 210 struct resource_list_entry *rle; 211 struct central_softc *sc; 212 struct resource *res; 213 bus_addr_t coffset; 214 bus_addr_t cend; 215 bus_addr_t phys; 216 int isdefault; 217 int passthrough; 218 int i; 219 220 isdefault = (start == 0UL && end == ~0UL); 221 passthrough = (device_get_parent(child) != bus); 222 res = NULL; 223 rle = NULL; 224 rl = BUS_GET_RESOURCE_LIST(bus, child); 225 sc = device_get_softc(bus); 226 switch (type) { 227 case SYS_RES_IRQ: 228 return (resource_list_alloc(rl, bus, child, type, rid, start, 229 end, count, flags)); 230 case SYS_RES_MEMORY: 231 if (!passthrough) { 232 rle = resource_list_find(rl, type, *rid); 233 if (rle == NULL) 234 return (NULL); 235 if (rle->res != NULL) 236 panic("%s: resource entry is busy", __func__); 237 if (isdefault) { 238 start = rle->start; 239 count = ulmax(count, rle->count); 240 end = ulmax(rle->end, start + count - 1); 241 } 242 } 243 for (i = 0; i < sc->sc_nrange; i++) { 244 coffset = sc->sc_ranges[i].coffset; 245 cend = coffset + sc->sc_ranges[i].size - 1; 246 if (start >= coffset && end <= cend) { 247 start -= coffset; 248 end -= coffset; 249 phys = sc->sc_ranges[i].poffset | 250 ((bus_addr_t)sc->sc_ranges[i].pspace << 32); 251 res = bus_generic_alloc_resource(bus, child, 252 type, rid, phys + start, phys + end, 253 count, flags); 254 if (!passthrough) 255 rle->res = res; 256 break; 257 } 258 } 259 break; 260 } 261 return (res); 262} 263 264static struct resource_list * 265central_get_resource_list(device_t bus, device_t child) 266{ 267 struct central_devinfo *cdi; 268 269 cdi = device_get_ivars(child); 270 return (&cdi->cdi_rl); 271} 272 273static const struct ofw_bus_devinfo * 274central_get_devinfo(device_t bus, device_t child) 275{ 276 struct central_devinfo *cdi; 277 278 cdi = device_get_ivars(child); 279 return (&cdi->cdi_obdinfo); 280} 281 282static int 283central_print_res(struct central_devinfo *cdi) 284{ 285 286 return (resource_list_print_type(&cdi->cdi_rl, "mem", SYS_RES_MEMORY, 287 "%#lx")); 288} 289