central.c revision 227848
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 227848 2011-11-22 21:55:40Z 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_adjust_resource_t central_adjust_resource; 64static bus_get_resource_list_t central_get_resource_list; 65static ofw_bus_get_devinfo_t central_get_devinfo; 66 67static int central_print_res(struct central_devinfo *); 68 69static device_method_t central_methods[] = { 70 /* Device interface */ 71 DEVMETHOD(device_probe, central_probe), 72 DEVMETHOD(device_attach, central_attach), 73 DEVMETHOD(device_shutdown, bus_generic_shutdown), 74 DEVMETHOD(device_suspend, bus_generic_suspend), 75 DEVMETHOD(device_resume, bus_generic_resume), 76 77 /* Bus interface */ 78 DEVMETHOD(bus_print_child, central_print_child), 79 DEVMETHOD(bus_probe_nomatch, central_probe_nomatch), 80 DEVMETHOD(bus_alloc_resource, central_alloc_resource), 81 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 82 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 83 DEVMETHOD(bus_adjust_resource, central_adjust_resource), 84 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 85 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 86 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 87 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 88 DEVMETHOD(bus_get_resource_list, central_get_resource_list), 89 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str), 90 91 /* ofw_bus interface */ 92 DEVMETHOD(ofw_bus_get_devinfo, central_get_devinfo), 93 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 94 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 95 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 96 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 97 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 98 99 DEVMETHOD_END 100}; 101 102static driver_t central_driver = { 103 "central", 104 central_methods, 105 sizeof(struct central_softc), 106}; 107 108static devclass_t central_devclass; 109 110EARLY_DRIVER_MODULE(central, nexus, central_driver, central_devclass, 0, 0, 111 BUS_PASS_BUS); 112MODULE_DEPEND(fhc, nexus, 1, 1, 1); 113MODULE_VERSION(central, 1); 114 115static int 116central_probe(device_t dev) 117{ 118 119 if (strcmp(ofw_bus_get_name(dev), "central") == 0) { 120 device_set_desc(dev, "central"); 121 return (0); 122 } 123 return (ENXIO); 124} 125 126static int 127central_attach(device_t dev) 128{ 129 struct central_devinfo *cdi; 130 struct sbus_regs *reg; 131 struct central_softc *sc; 132 phandle_t child; 133 phandle_t node; 134 device_t cdev; 135 int nreg; 136 int i; 137 138 sc = device_get_softc(dev); 139 node = ofw_bus_get_node(dev); 140 141 sc->sc_nrange = OF_getprop_alloc(node, "ranges", 142 sizeof(*sc->sc_ranges), (void **)&sc->sc_ranges); 143 if (sc->sc_nrange == -1) { 144 device_printf(dev, "can't get ranges\n"); 145 return (ENXIO); 146 } 147 148 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 149 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO); 150 if (ofw_bus_gen_setup_devinfo(&cdi->cdi_obdinfo, child) != 0) { 151 free(cdi, M_DEVBUF); 152 continue; 153 } 154 nreg = OF_getprop_alloc(child, "reg", sizeof(*reg), 155 (void **)®); 156 if (nreg == -1) { 157 device_printf(dev, "<%s>: incomplete\n", 158 cdi->cdi_obdinfo.obd_name); 159 ofw_bus_gen_destroy_devinfo(&cdi->cdi_obdinfo); 160 free(cdi, M_DEVBUF); 161 continue; 162 } 163 resource_list_init(&cdi->cdi_rl); 164 for (i = 0; i < nreg; i++) 165 resource_list_add(&cdi->cdi_rl, SYS_RES_MEMORY, i, 166 reg[i].sbr_offset, reg[i].sbr_offset + 167 reg[i].sbr_size, reg[i].sbr_size); 168 free(reg, M_OFWPROP); 169 cdev = device_add_child(dev, NULL, -1); 170 if (cdev == NULL) { 171 device_printf(dev, "<%s>: device_add_child failed\n", 172 cdi->cdi_obdinfo.obd_name); 173 resource_list_free(&cdi->cdi_rl); 174 ofw_bus_gen_destroy_devinfo(&cdi->cdi_obdinfo); 175 free(cdi, M_DEVBUF); 176 continue; 177 } 178 device_set_ivars(cdev, cdi); 179 } 180 181 return (bus_generic_attach(dev)); 182} 183 184static int 185central_adjust_resource(device_t bus __unused, device_t child __unused, 186 int type __unused, struct resource *r __unused, u_long start __unused, 187 u_long end __unused) 188{ 189 190 return (ENXIO); 191} 192 193static int 194central_print_child(device_t dev, device_t child) 195{ 196 int rv; 197 198 rv = bus_print_child_header(dev, child); 199 rv += central_print_res(device_get_ivars(child)); 200 rv += bus_print_child_footer(dev, child); 201 return (rv); 202} 203 204static void 205central_probe_nomatch(device_t dev, device_t child) 206{ 207 const char *type; 208 209 device_printf(dev, "<%s>", ofw_bus_get_name(child)); 210 central_print_res(device_get_ivars(child)); 211 type = ofw_bus_get_type(child); 212 printf(" type %s (no driver attached)\n", 213 type != NULL ? type : "unknown"); 214} 215 216static struct resource * 217central_alloc_resource(device_t bus, device_t child, int type, int *rid, 218 u_long start, u_long end, u_long count, u_int flags) 219{ 220 struct resource_list *rl; 221 struct resource_list_entry *rle; 222 struct central_softc *sc; 223 struct resource *res; 224 bus_addr_t coffset; 225 bus_addr_t cend; 226 bus_addr_t phys; 227 int isdefault; 228 int passthrough; 229 int i; 230 231 isdefault = (start == 0UL && end == ~0UL); 232 passthrough = (device_get_parent(child) != bus); 233 res = NULL; 234 rle = NULL; 235 rl = BUS_GET_RESOURCE_LIST(bus, child); 236 sc = device_get_softc(bus); 237 switch (type) { 238 case SYS_RES_IRQ: 239 return (resource_list_alloc(rl, bus, child, type, rid, start, 240 end, count, flags)); 241 case SYS_RES_MEMORY: 242 if (!passthrough) { 243 rle = resource_list_find(rl, type, *rid); 244 if (rle == NULL) 245 return (NULL); 246 if (rle->res != NULL) 247 panic("%s: resource entry is busy", __func__); 248 if (isdefault) { 249 start = rle->start; 250 count = ulmax(count, rle->count); 251 end = ulmax(rle->end, start + count - 1); 252 } 253 } 254 for (i = 0; i < sc->sc_nrange; i++) { 255 coffset = sc->sc_ranges[i].coffset; 256 cend = coffset + sc->sc_ranges[i].size - 1; 257 if (start >= coffset && end <= cend) { 258 start -= coffset; 259 end -= coffset; 260 phys = sc->sc_ranges[i].poffset | 261 ((bus_addr_t)sc->sc_ranges[i].pspace << 32); 262 res = bus_generic_alloc_resource(bus, child, 263 type, rid, phys + start, phys + end, 264 count, flags); 265 if (!passthrough) 266 rle->res = res; 267 break; 268 } 269 } 270 break; 271 } 272 return (res); 273} 274 275static struct resource_list * 276central_get_resource_list(device_t bus, device_t child) 277{ 278 struct central_devinfo *cdi; 279 280 cdi = device_get_ivars(child); 281 return (&cdi->cdi_rl); 282} 283 284static const struct ofw_bus_devinfo * 285central_get_devinfo(device_t bus, device_t child) 286{ 287 struct central_devinfo *cdi; 288 289 cdi = device_get_ivars(child); 290 return (&cdi->cdi_obdinfo); 291} 292 293static int 294central_print_res(struct central_devinfo *cdi) 295{ 296 297 return (resource_list_print_type(&cdi->cdi_rl, "mem", SYS_RES_MEMORY, 298 "%#lx")); 299} 300