beri_simplebus.c revision 273675
1/*- 2 * Copyright (c) 2009-2010 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Semihalf under sponsorship from 6 * the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD: stable/10/sys/mips/beri/beri_simplebus.c 273675 2014-10-26 04:01:57Z ian $"); 32 33#include "opt_platform.h" 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/ktr.h> 37#include <sys/kernel.h> 38#include <sys/module.h> 39#include <sys/bus.h> 40#include <sys/rman.h> 41#include <sys/malloc.h> 42 43#include <dev/ofw/ofw_bus.h> 44#include <dev/ofw/ofw_bus_subr.h> 45#include <dev/ofw/openfirm.h> 46 47#include <dev/fdt/fdt_common.h> 48#include "fdt_ic_if.h" 49#include "ofw_bus_if.h" 50 51#ifdef DEBUG 52#define debugf(fmt, args...) do { printf("%s(): ", __func__); \ 53 printf(fmt,##args); } while (0) 54#else 55#define debugf(fmt, args...) 56#endif 57 58static MALLOC_DEFINE(M_SIMPLEBUS, "simplebus", "simplebus devices information"); 59 60struct simplebus_softc { 61 int sc_addr_cells; 62 int sc_size_cells; 63}; 64 65struct simplebus_devinfo { 66 struct ofw_bus_devinfo di_ofw; 67 struct resource_list di_res; 68 69 /* Interrupts sense-level info for this device */ 70 struct fdt_sense_level di_intr_sl[DI_MAX_INTR_NUM]; 71}; 72 73/* 74 * Prototypes. 75 */ 76static int simplebus_probe(device_t); 77static int simplebus_attach(device_t); 78 79static int simplebus_print_child(device_t, device_t); 80static int simplebus_setup_intr(device_t, device_t, struct resource *, int, 81 driver_filter_t *, driver_intr_t *, void *, void **); 82static int simplebus_teardown_intr(device_t, device_t, struct resource *, 83 void *); 84 85static int simplebus_activate_resource(device_t, device_t, int, int, 86 struct resource *); 87static struct resource *simplebus_alloc_resource(device_t, device_t, int, 88 int *, u_long, u_long, u_long, u_int); 89static int simplebus_deactivate_resource(device_t, device_t, int, int, 90 struct resource *); 91static int simplebus_release_resource(device_t, device_t, int, int, 92 struct resource *); 93static device_t simplebus_get_interrupt_parent(device_t); 94static struct resource_list *simplebus_get_resource_list(device_t, device_t); 95 96static ofw_bus_get_devinfo_t simplebus_get_devinfo; 97 98/* 99 * Bus interface definition. 100 */ 101static device_method_t simplebus_methods[] = { 102 /* Device interface */ 103 DEVMETHOD(device_probe, simplebus_probe), 104 DEVMETHOD(device_attach, simplebus_attach), 105 DEVMETHOD(device_detach, bus_generic_detach), 106 DEVMETHOD(device_shutdown, bus_generic_shutdown), 107 DEVMETHOD(device_suspend, bus_generic_suspend), 108 DEVMETHOD(device_resume, bus_generic_resume), 109 110 /* Bus interface */ 111 DEVMETHOD(bus_print_child, simplebus_print_child), 112 DEVMETHOD(bus_alloc_resource, simplebus_alloc_resource), 113 DEVMETHOD(bus_release_resource, simplebus_release_resource), 114 DEVMETHOD(bus_activate_resource, simplebus_activate_resource), 115 DEVMETHOD(bus_deactivate_resource, simplebus_deactivate_resource), 116 DEVMETHOD(bus_setup_intr, simplebus_setup_intr), 117 DEVMETHOD(bus_teardown_intr, simplebus_teardown_intr), 118 DEVMETHOD(bus_get_resource_list, simplebus_get_resource_list), 119 120 /* OFW bus interface */ 121 DEVMETHOD(ofw_bus_get_devinfo, simplebus_get_devinfo), 122 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 123 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 124 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 125 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 126 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 127 128 { 0, 0 } 129}; 130 131static driver_t simplebus_driver = { 132 "simplebus", 133 simplebus_methods, 134 sizeof(struct simplebus_softc) 135}; 136 137devclass_t simplebus_devclass; 138 139DRIVER_MODULE(simplebus, ofwbus, simplebus_driver, simplebus_devclass, 0, 0); 140DRIVER_MODULE(simplebus, simplebus, simplebus_driver, simplebus_devclass, 0, 141 0); 142 143static int 144simplebus_probe(device_t dev) 145{ 146 147 if (!ofw_bus_status_okay(dev)) 148 return (ENXIO); 149 150 if (!ofw_bus_is_compatible(dev, "simple-bus")) 151 return (ENXIO); 152 153 device_set_desc(dev, "Flattened device tree simple bus"); 154 155 return (BUS_PROBE_SPECIFIC); 156} 157 158static int 159simplebus_attach(device_t dev) 160{ 161 device_t dev_child; 162 struct simplebus_devinfo *di; 163 struct simplebus_softc *sc; 164 phandle_t dt_node, dt_child; 165 166 sc = device_get_softc(dev); 167 168 /* 169 * Walk simple-bus and add direct subordinates as our children. 170 */ 171 dt_node = ofw_bus_get_node(dev); 172 for (dt_child = OF_child(dt_node); dt_child != 0; 173 dt_child = OF_peer(dt_child)) { 174 175 /* Check and process 'status' property. */ 176 if (!(fdt_is_enabled(dt_child))) 177 continue; 178 179 if (!(fdt_pm_is_enabled(dt_child))) 180 continue; 181 182 di = malloc(sizeof(*di), M_SIMPLEBUS, M_WAITOK | M_ZERO); 183 184 if (ofw_bus_gen_setup_devinfo(&di->di_ofw, dt_child) != 0) { 185 free(di, M_SIMPLEBUS); 186 device_printf(dev, "could not set up devinfo\n"); 187 continue; 188 } 189 190 resource_list_init(&di->di_res); 191 if (fdt_reg_to_rl(dt_child, &di->di_res)) { 192 device_printf(dev, 193 "%s: could not process 'reg' " 194 "property\n", di->di_ofw.obd_name); 195 ofw_bus_gen_destroy_devinfo(&di->di_ofw); 196 free(di, M_SIMPLEBUS); 197 continue; 198 } 199 200 if (ofw_bus_intr_to_rl(dev, dt_child, &di->di_res)) { 201 device_printf(dev, "%s: could not process " 202 "'interrupts' property\n", di->di_ofw.obd_name); 203 resource_list_free(&di->di_res); 204 ofw_bus_gen_destroy_devinfo(&di->di_ofw); 205 free(di, M_SIMPLEBUS); 206 continue; 207 } 208 209 /* Add newbus device for this FDT node */ 210 dev_child = device_add_child(dev, NULL, -1); 211 if (dev_child == NULL) { 212 device_printf(dev, "could not add child: %s\n", 213 di->di_ofw.obd_name); 214 resource_list_free(&di->di_res); 215 ofw_bus_gen_destroy_devinfo(&di->di_ofw); 216 free(di, M_SIMPLEBUS); 217 continue; 218 } 219#ifdef DEBUG 220 device_printf(dev, "added child: %s\n\n", di->di_ofw.obd_name); 221#endif 222 device_set_ivars(dev_child, di); 223 } 224 225 return (bus_generic_attach(dev)); 226} 227 228static int 229simplebus_print_child(device_t dev, device_t child) 230{ 231 device_t ip; 232 struct simplebus_devinfo *di; 233 struct resource_list *rl; 234 int rv; 235 236 di = device_get_ivars(child); 237 rl = &di->di_res; 238 239 rv = 0; 240 rv += bus_print_child_header(dev, child); 241 rv += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx"); 242 rv += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 243 if ((ip = simplebus_get_interrupt_parent(child)) != NULL) 244 rv += printf(" (%s)", device_get_nameunit(ip)); 245 rv += bus_print_child_footer(dev, child); 246 247 return (rv); 248} 249 250static struct resource * 251simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid, 252 u_long start, u_long end, u_long count, u_int flags) 253{ 254 device_t ic; 255 struct simplebus_devinfo *di; 256 struct resource_list_entry *rle; 257 258 /* 259 * Request for the default allocation with a given rid: use resource 260 * list stored in the local device info. 261 */ 262 if ((start == 0UL) && (end == ~0UL)) { 263 if ((di = device_get_ivars(child)) == NULL) 264 return (NULL); 265 266 if (type == SYS_RES_IOPORT) 267 type = SYS_RES_MEMORY; 268 269 rle = resource_list_find(&di->di_res, type, *rid); 270 if (rle == NULL) { 271 if (bootverbose) 272 device_printf(bus, "no default resources for " 273 "rid = %d, type = %d\n", *rid, type); 274 return (NULL); 275 } 276 start = rle->start; 277 end = rle->end; 278 count = rle->count; 279 } 280 281 if (type == SYS_RES_IRQ && 282 (ic = simplebus_get_interrupt_parent(child)) != NULL) 283 return(FDT_IC_ALLOC_INTR(ic, child, rid, start, flags)); 284 285 return (bus_generic_alloc_resource(bus, child, type, rid, start, end, 286 count, flags)); 287} 288 289static int 290simplebus_activate_resource(device_t dev, device_t child, int type, int rid, 291 struct resource *r) 292{ 293 device_t ic; 294 295 if (type == SYS_RES_IRQ && 296 (ic = simplebus_get_interrupt_parent(child)) != NULL) 297 return (FDT_IC_ACTIVATE_INTR(ic, r)); 298 299 return (bus_generic_activate_resource(dev, child, type, rid, r)); 300} 301 302static int 303simplebus_deactivate_resource(device_t dev, device_t child, int type, int rid, 304 struct resource *r) 305{ 306 device_t ic; 307 308 if (type == SYS_RES_IRQ && 309 (ic = simplebus_get_interrupt_parent(child)) != NULL) 310 return (FDT_IC_DEACTIVATE_INTR(ic, r)); 311 312 return (bus_generic_deactivate_resource(dev, child, type, rid, r)); 313} 314 315static int 316simplebus_release_resource(device_t dev, device_t child, int type, int rid, 317 struct resource *r) 318{ 319 device_t ic; 320 321 if (type == SYS_RES_IRQ && 322 (ic = simplebus_get_interrupt_parent(child)) != NULL) 323 return (FDT_IC_RELEASE_INTR(ic, r)); 324 325 return (bus_generic_release_resource(dev, child, type, rid, r)); 326} 327 328static struct resource_list * 329simplebus_get_resource_list(device_t bus, device_t child) 330{ 331 struct simplebus_devinfo *di; 332 333 di = device_get_ivars(child); 334 return (&di->di_res); 335} 336 337static device_t 338simplebus_get_interrupt_parent(device_t dev) 339{ 340 struct simplebus_devinfo *di; 341 struct fdt_ic *ic; 342 device_t ip; 343 phandle_t ph, iph; 344 345 ip = NULL; 346 347 di = device_get_ivars(dev); 348 if (di == NULL) 349 return (NULL); 350 351 if (OF_getencprop(di->di_ofw.obd_node, "interrupt-parent", &iph, 352 sizeof(iph)) > 0) { 353 ph = OF_node_from_xref(iph); 354 SLIST_FOREACH(ic, &fdt_ic_list_head, fdt_ics) { 355 if (ic->iph == ph) { 356 ip = ic->dev; 357 break; 358 } 359 } 360 } 361 return (ip); 362} 363 364static int 365simplebus_setup_intr(device_t bus, device_t child, struct resource *res, 366 int flags, driver_filter_t *filter, driver_intr_t *ihand, void *arg, 367 void **cookiep) 368{ 369 struct simplebus_devinfo *di; 370 device_t ic; 371 enum intr_trigger trig; 372 enum intr_polarity pol; 373 int error, irq, rid; 374 375 di = device_get_ivars(child); 376 if (di == NULL) 377 return (ENXIO); 378 379 if (res == NULL) 380 return (EINVAL); 381 382 rid = rman_get_rid(res); 383 if (rid >= DI_MAX_INTR_NUM) 384 return (ENOENT); 385 386 ic = simplebus_get_interrupt_parent(child); 387 388 trig = di->di_intr_sl[rid].trig; 389 pol = di->di_intr_sl[rid].pol; 390 if (trig != INTR_TRIGGER_CONFORM || pol != INTR_POLARITY_CONFORM) { 391 irq = rman_get_start(res); 392 if (ic != NULL) 393 error = FDT_IC_CONFIG_INTR(ic, irq, trig, pol); 394 else 395 error = bus_generic_config_intr(bus, irq, trig, pol); 396 if (error) 397 return (error); 398 } 399 400 if (ic != NULL) 401 error = FDT_IC_SETUP_INTR(ic, child, res, flags, filter, 402 ihand, arg, cookiep); 403 else 404 error = bus_generic_setup_intr(bus, child, res, flags, filter, 405 ihand, arg, cookiep); 406 return (error); 407} 408 409static int 410simplebus_teardown_intr(device_t bus, device_t child, struct resource *res, 411 void *cookie) 412{ 413 device_t ic; 414 415 if ((ic = simplebus_get_interrupt_parent(child)) != NULL) 416 return (FDT_IC_TEARDOWN_INTR(ic, child, res, cookie)); 417 418 return (bus_generic_teardown_intr(bus, child, res, cookie)); 419} 420 421static const struct ofw_bus_devinfo * 422simplebus_get_devinfo(device_t bus, device_t child) 423{ 424 struct simplebus_devinfo *di; 425 426 di = device_get_ivars(child); 427 return (&di->di_ofw); 428} 429