Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/mips/alchemy/obio.c
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1 /* $NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/bus.h> 44 #include <sys/interrupt.h> 45 #include <sys/kernel.h> 46 #include <sys/module.h> 47 #include <sys/rman.h> 48 #include <sys/malloc.h> 49 50 #include <machine/bus.h> 51 52 #include <mips/adm5120/adm5120reg.h> 53 #include <mips/adm5120/obiovar.h> 54 55 /* MIPS HW interrupts of IRQ/FIQ respectively */ 56 #define ADM5120_INTR 0 57 #define ADM5120_FAST_INTR 1 58 59 /* Interrupt levels */ 60 #define INTR_IRQ 0 61 #define INTR_FIQ 1 62 63 int irq_priorities[NIRQS] = { 64 INTR_IRQ, /* flash */ 65 INTR_FIQ, /* uart0 */ 66 INTR_FIQ, /* uart1 */ 67 INTR_IRQ, /* ahci */ 68 INTR_IRQ, /* unknown */ 69 INTR_IRQ, /* unknown */ 70 INTR_IRQ, /* unknown */ 71 INTR_IRQ, /* unknown */ 72 INTR_IRQ, /* unknown */ 73 INTR_IRQ, /* admsw */ 74 INTR_IRQ, /* unknown */ 75 INTR_IRQ, /* unknown */ 76 INTR_IRQ, /* unknown */ 77 INTR_IRQ, /* unknown */ 78 INTR_IRQ, /* unknown */ 79 INTR_IRQ, /* unknown */ 80 INTR_IRQ, /* unknown */ 81 INTR_IRQ, /* unknown */ 82 INTR_IRQ, /* unknown */ 83 INTR_IRQ, /* unknown */ 84 INTR_IRQ, /* unknown */ 85 INTR_IRQ, /* unknown */ 86 INTR_IRQ, /* unknown */ 87 INTR_IRQ, /* unknown */ 88 INTR_IRQ, /* unknown */ 89 INTR_IRQ, /* unknown */ 90 INTR_IRQ, /* unknown */ 91 INTR_IRQ, /* unknown */ 92 INTR_IRQ, /* unknown */ 93 INTR_IRQ, /* unknown */ 94 INTR_IRQ, /* unknown */ 95 INTR_IRQ, /* unknown */ 96 }; 97 98 99 #define REG_READ(o) *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(ADM5120_BASE_ICU + (o))) 100 #define REG_WRITE(o,v) (REG_READ(o)) = (v) 101 102 static int obio_activate_resource(device_t, device_t, int, int, 103 struct resource *); 104 static device_t obio_add_child(device_t, u_int, const char *, int); 105 static struct resource * 106 obio_alloc_resource(device_t, device_t, int, int *, rman_res_t, 107 rman_res_t, rman_res_t, u_int); 108 static int obio_attach(device_t); 109 static int obio_deactivate_resource(device_t, device_t, int, int, 110 struct resource *); 111 static struct resource_list * 112 obio_get_resource_list(device_t, device_t); 113 static void obio_hinted_child(device_t, const char *, int); 114 static int obio_intr(void *); 115 static int obio_probe(device_t); 116 static int obio_release_resource(device_t, device_t, int, int, 117 struct resource *); 118 static int obio_setup_intr(device_t, device_t, struct resource *, int, 119 driver_filter_t *, driver_intr_t *, void *, void **); 120 static int obio_teardown_intr(device_t, device_t, struct resource *, 121 void *); 122 123 static void 124 obio_mask_irq(void *arg) 125 { 126 /* XXX need to write */ 127 #if 0 128 unsigned int irq = (unsigned int)arg; 129 int ip_bit, mask, mask_register; 130 131 /* mask IRQ */ 132 mask_register = ICU_IRQ_MASK_REG(irq); 133 ip_bit = ICU_IP_BIT(irq); 134 135 mask = ICU_REG_READ(mask_register); 136 ICU_REG_WRITE(mask_register, mask | ip_bit); 137 #endif 138 } 139 140 static void 141 obio_unmask_irq(void *arg) 142 { 143 /* XXX need to write */ 144 #if 0 145 unsigned int irq = (unsigned int)arg; 146 int ip_bit, mask, mask_register; 147 148 /* unmask IRQ */ 149 mask_register = ICU_IRQ_MASK_REG(irq); 150 ip_bit = ICU_IP_BIT(irq); 151 152 mask = ICU_REG_READ(mask_register); 153 ICU_REG_WRITE(mask_register, mask & ~ip_bit); 154 #endif 155 } 156 157 static int 158 obio_probe(device_t dev) 159 { 160 161 return (BUS_PROBE_NOWILDCARD); 162 } 163 164 static int 165 obio_attach(device_t dev) 166 { 167 struct obio_softc *sc = device_get_softc(dev); 168 int rid; 169 170 sc->oba_mem_rman.rm_type = RMAN_ARRAY; 171 sc->oba_mem_rman.rm_descr = "OBIO memeory"; 172 if (rman_init(&sc->oba_mem_rman) != 0 || 173 rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START, 174 OBIO_MEM_START + OBIO_MEM_SIZE) != 0) 175 panic("obio_attach: failed to set up I/O rman"); 176 177 sc->oba_irq_rman.rm_type = RMAN_ARRAY; 178 sc->oba_irq_rman.rm_descr = "OBIO IRQ"; 179 180 if (rman_init(&sc->oba_irq_rman) != 0 || 181 rman_manage_region(&sc->oba_irq_rman, 0, NIRQS-1) != 0) 182 panic("obio_attach: failed to set up IRQ rman"); 183 184 /* Hook up our interrupt handler. */ 185 if ((sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 186 ADM5120_INTR, ADM5120_INTR, 1, 187 RF_SHAREABLE | RF_ACTIVE)) == NULL) { 188 device_printf(dev, "unable to allocate IRQ resource\n"); 189 return (ENXIO); 190 } 191 192 if ((bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC, obio_intr, NULL, 193 sc, &sc->sc_ih))) { 194 device_printf(dev, 195 "WARNING: unable to register interrupt handler\n"); 196 return (ENXIO); 197 } 198 199 /* Hook up our FAST interrupt handler. */ 200 if ((sc->sc_fast_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 201 ADM5120_FAST_INTR, ADM5120_FAST_INTR, 1, 202 RF_SHAREABLE | RF_ACTIVE)) == NULL) { 203 device_printf(dev, "unable to allocate IRQ resource\n"); 204 return (ENXIO); 205 } 206 207 if ((bus_setup_intr(dev, sc->sc_fast_irq, INTR_TYPE_MISC, obio_intr, 208 NULL, sc, &sc->sc_fast_ih))) { 209 device_printf(dev, 210 "WARNING: unable to register interrupt handler\n"); 211 return (ENXIO); 212 } 213 214 /* disable all interrupts */ 215 REG_WRITE(ICU_ENABLE_REG, ICU_INT_MASK); 216 217 bus_generic_probe(dev); 218 bus_enumerate_hinted_children(dev); 219 bus_generic_attach(dev); 220 221 return (0); 222 } 223 224 static struct resource * 225 obio_alloc_resource(device_t bus, device_t child, int type, int *rid, 226 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 227 { 228 struct obio_softc *sc = device_get_softc(bus); 229 struct obio_ivar *ivar = device_get_ivars(child); 230 struct resource *rv; 231 struct resource_list_entry *rle; 232 struct rman *rm; 233 int isdefault, needactivate, passthrough; 234 235 isdefault = (RMAN_IS_DEFAULT_RANGE(start, end) && count == 1); 236 needactivate = flags & RF_ACTIVE; 237 passthrough = (device_get_parent(child) != bus); 238 rle = NULL; 239 240 if (passthrough) 241 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, 242 rid, start, end, count, flags)); 243 244 /* 245 * If this is an allocation of the "default" range for a given RID, 246 * and we know what the resources for this device are (ie. they aren't 247 * maintained by a child bus), then work out the start/end values. 248 */ 249 if (isdefault) { 250 rle = resource_list_find(&ivar->resources, type, *rid); 251 if (rle == NULL) 252 return (NULL); 253 if (rle->res != NULL) { 254 panic("%s: resource entry is busy", __func__); 255 } 256 start = rle->start; 257 end = rle->end; 258 count = rle->count; 259 } 260 261 switch (type) { 262 case SYS_RES_IRQ: 263 rm = &sc->oba_irq_rman; 264 break; 265 case SYS_RES_MEMORY: 266 rm = &sc->oba_mem_rman; 267 break; 268 default: 269 printf("%s: unknown resource type %d\n", __func__, type); 270 return (0); 271 } 272 273 rv = rman_reserve_resource(rm, start, end, count, flags, child); 274 if (rv == NULL) { 275 printf("%s: could not reserve resource\n", __func__); 276 return (0); 277 } 278 279 rman_set_rid(rv, *rid); 280 281 if (needactivate) { 282 if (bus_activate_resource(child, type, *rid, rv)) { 283 printf("%s: could not activate resource\n", __func__); 284 rman_release_resource(rv); 285 return (0); 286 } 287 } 288 289 return (rv); 290 } 291 292 static int 293 obio_activate_resource(device_t bus, device_t child, int type, int rid, 294 struct resource *r) 295 { 296 297 /* 298 * If this is a memory resource, track the direct mapping 299 * in the uncached MIPS KSEG1 segment. 300 */ 301 if (type == SYS_RES_MEMORY) { 302 void *vaddr; 303 304 vaddr = (void *)MIPS_PHYS_TO_KSEG1((intptr_t)rman_get_start(r)); 305 rman_set_virtual(r, vaddr); 306 rman_set_bustag(r, mips_bus_space_generic); 307 rman_set_bushandle(r, (bus_space_handle_t)vaddr); 308 } 309 310 return (rman_activate_resource(r)); 311 } 312 313 static int 314 obio_deactivate_resource(device_t bus, device_t child, int type, int rid, 315 struct resource *r) 316 { 317 318 return (rman_deactivate_resource(r)); 319 } 320 321 static int 322 obio_release_resource(device_t dev, device_t child, int type, 323 int rid, struct resource *r) 324 { 325 struct resource_list *rl; 326 struct resource_list_entry *rle; 327 328 rl = obio_get_resource_list(dev, child); 329 if (rl == NULL) 330 return (EINVAL); 331 rle = resource_list_find(rl, type, rid); 332 if (rle == NULL) 333 return (EINVAL); 334 rman_release_resource(r); 335 rle->res = NULL; 336 337 return (0); 338 } 339 340 static int 341 obio_setup_intr(device_t dev, device_t child, struct resource *ires, 342 int flags, driver_filter_t *filt, driver_intr_t *handler, 343 void *arg, void **cookiep) 344 { 345 struct obio_softc *sc = device_get_softc(dev); 346 struct intr_event *event; 347 int irq, error, priority; 348 uint32_t irqmask; 349 350 irq = rman_get_start(ires); 351 352 if (irq >= NIRQS) 353 panic("%s: bad irq %d", __func__, irq); 354 355 event = sc->sc_eventstab[irq]; 356 if (event == NULL) { 357 error = intr_event_create(&event, (void *)irq, 0, irq, 358 obio_mask_irq, obio_unmask_irq, 359 NULL, NULL, 360 "obio intr%d:", irq); 361 362 sc->sc_eventstab[irq] = event; 363 } 364 else 365 panic("obio: Can't share IRQs"); 366 367 intr_event_add_handler(event, device_get_nameunit(child), filt, 368 handler, arg, intr_priority(flags), flags, cookiep); 369 370 irqmask = 1 << irq; 371 priority = irq_priorities[irq]; 372 373 if (priority == INTR_FIQ) 374 REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) | irqmask); 375 else 376 REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) & ~irqmask); 377 378 /* enable */ 379 REG_WRITE(ICU_ENABLE_REG, irqmask); 380 381 return (0); 382 } 383 384 static int 385 obio_teardown_intr(device_t dev, device_t child, struct resource *ires, 386 void *cookie) 387 { 388 struct obio_softc *sc = device_get_softc(dev); 389 int irq, result; 390 uint32_t irqmask; 391 392 irq = rman_get_start(ires); 393 if (irq >= NIRQS) 394 panic("%s: bad irq %d", __func__, irq); 395 396 if (sc->sc_eventstab[irq] == NULL) 397 panic("Trying to teardown unoccupied IRQ"); 398 399 irqmask = 1 << irq; /* only used as a mask from here on */ 400 401 /* disable this irq in HW */ 402 REG_WRITE(ICU_DISABLE_REG, irqmask); 403 404 result = intr_event_remove_handler(cookie); 405 if (!result) { 406 sc->sc_eventstab[irq] = NULL; 407 } 408 409 return (result); 410 } 411 412 static int 413 obio_intr(void *arg) 414 { 415 struct obio_softc *sc = arg; 416 struct intr_event *event; 417 uint32_t irqstat; 418 int irq; 419 420 irqstat = REG_READ(ICU_FIQ_STATUS_REG); 421 irqstat |= REG_READ(ICU_STATUS_REG); 422 423 irq = 0; 424 while (irqstat != 0) { 425 if ((irqstat & 1) == 1) { 426 event = sc->sc_eventstab[irq]; 427 if (!event || TAILQ_EMPTY(&event->ie_handlers)) 428 continue; 429 430 /* TODO: pass frame as an argument*/ 431 /* TODO: log stray interrupt */ 432 intr_event_handle(event, NULL); 433 } 434 435 irq++; 436 irqstat >>= 1; 437 } 438 439 return (FILTER_HANDLED); 440 } 441 442 static void 443 obio_hinted_child(device_t bus, const char *dname, int dunit) 444 { 445 device_t child; 446 long maddr; 447 int msize; 448 int irq; 449 int result; 450 451 child = BUS_ADD_CHILD(bus, 0, dname, dunit); 452 453 /* 454 * Set hard-wired resources for hinted child using 455 * specific RIDs. 456 */ 457 resource_long_value(dname, dunit, "maddr", &maddr); 458 resource_int_value(dname, dunit, "msize", &msize); 459 460 461 result = bus_set_resource(child, SYS_RES_MEMORY, 0, 462 maddr, msize); 463 if (result != 0) 464 device_printf(bus, "warning: bus_set_resource() failed\n"); 465 466 if (resource_int_value(dname, dunit, "irq", &irq) == 0) { 467 result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1); 468 if (result != 0) 469 device_printf(bus, 470 "warning: bus_set_resource() failed\n"); 471 } 472 } 473 474 static device_t 475 obio_add_child(device_t bus, u_int order, const char *name, int unit) 476 { 477 device_t child; 478 struct obio_ivar *ivar; 479 480 ivar = malloc(sizeof(struct obio_ivar), M_DEVBUF, M_WAITOK | M_ZERO); 481 resource_list_init(&ivar->resources); 482 483 child = device_add_child_ordered(bus, order, name, unit); 484 if (child == NULL) { 485 printf("Can't add child %s%d ordered\n", name, unit); 486 return (0); 487 } 488 489 device_set_ivars(child, ivar); 490 491 return (child); 492 } 493 494 /* 495 * Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource 496 * Provides pointer to resource_list for these routines 497 */ 498 static struct resource_list * 499 obio_get_resource_list(device_t dev, device_t child) 500 { 501 struct obio_ivar *ivar; 502 503 ivar = device_get_ivars(child); 504 return (&(ivar->resources)); 505 } 506 507 static device_method_t obio_methods[] = { 508 DEVMETHOD(bus_activate_resource, obio_activate_resource), 509 DEVMETHOD(bus_add_child, obio_add_child), 510 DEVMETHOD(bus_alloc_resource, obio_alloc_resource), 511 DEVMETHOD(bus_deactivate_resource, obio_deactivate_resource), 512 DEVMETHOD(bus_get_resource_list, obio_get_resource_list), 513 DEVMETHOD(bus_hinted_child, obio_hinted_child), 514 DEVMETHOD(bus_release_resource, obio_release_resource), 515 DEVMETHOD(bus_setup_intr, obio_setup_intr), 516 DEVMETHOD(bus_teardown_intr, obio_teardown_intr), 517 DEVMETHOD(device_attach, obio_attach), 518 DEVMETHOD(device_probe, obio_probe), 519 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 520 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 521 522 {0, 0}, 523 }; 524 525 static driver_t obio_driver = { 526 "obio", 527 obio_methods, 528 sizeof(struct obio_softc), 529 }; 530 static devclass_t obio_devclass; 531 532 DRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0);
Cache object: 3a617ef7df2bec127709d6c6345a5dec
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