sys/mips/adm5120/obio.c

   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
 124 static void
 125 obio_mask_irq(void *source)
 126 {
 127         int irq;
 128         uint32_t irqmask;
 129         uint32_t reg;
 130
 131         irq = (int)source;
 132         irqmask = 1 << irq;
 133
 134         /* disable IRQ */
 135         reg = REG_READ(ICU_DISABLE_REG);
 136         REG_WRITE(ICU_DISABLE_REG, (reg | irqmask));
 137 }
 138
 139 static void
 140 obio_unmask_irq(void *source)
 141 {
 142         int irq;
 143         uint32_t irqmask;
 144         uint32_t reg;
 145
 146         irq = (int)source;
 147         irqmask = 1 << irq;
 148
 149         /* disable IRQ */
 150         reg = REG_READ(ICU_DISABLE_REG);
 151         REG_WRITE(ICU_DISABLE_REG, (reg & ~irqmask));
 152
 153 }
 154
 155
 156 static int
 157 obio_probe(device_t dev)
 158 {
 159
 160         return (BUS_PROBE_NOWILDCARD);
 161 }
 162
 163 static int
 164 obio_attach(device_t dev)
 165 {
 166         struct obio_softc *sc = device_get_softc(dev);
 167         int rid;
 168
 169         sc->oba_mem_rman.rm_type = RMAN_ARRAY;
 170         sc->oba_mem_rman.rm_descr = "OBIO memeory";
 171         if (rman_init(&sc->oba_mem_rman) != 0 ||
 172             rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START,
 173                 OBIO_MEM_START + OBIO_MEM_SIZE) != 0)
 174                 panic("obio_attach: failed to set up I/O rman");
 175
 176         sc->oba_irq_rman.rm_type = RMAN_ARRAY;
 177         sc->oba_irq_rman.rm_descr = "OBIO IRQ";
 178
 179         if (rman_init(&sc->oba_irq_rman) != 0 ||
 180             rman_manage_region(&sc->oba_irq_rman, 0, NIRQS-1) != 0)
 181                 panic("obio_attach: failed to set up IRQ rman");
 182
 183         /* Hook up our interrupt handler. */
 184         if ((sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
 185             ADM5120_INTR, ADM5120_INTR, 1,
 186             RF_SHAREABLE | RF_ACTIVE)) == NULL) {
 187                 device_printf(dev, "unable to allocate IRQ resource\n");
 188                 return (ENXIO);
 189         }
 190
 191         if ((bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC, obio_intr, NULL,
 192             sc, &sc->sc_ih))) {
 193                 device_printf(dev,
 194                     "WARNING: unable to register interrupt handler\n");
 195                 return (ENXIO);
 196         }
 197
 198         /* Hook up our FAST interrupt handler. */
 199         if ((sc->sc_fast_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
 200             ADM5120_FAST_INTR, ADM5120_FAST_INTR, 1,
 201             RF_SHAREABLE | RF_ACTIVE)) == NULL) {
 202                 device_printf(dev, "unable to allocate IRQ resource\n");
 203                 return (ENXIO);
 204         }
 205
 206         if ((bus_setup_intr(dev, sc->sc_fast_irq, INTR_TYPE_MISC, obio_intr,
 207             NULL, sc, &sc->sc_fast_ih))) {
 208                 device_printf(dev,
 209                     "WARNING: unable to register interrupt handler\n");
 210                 return (ENXIO);
 211         }
 212
 213         /* disable all interrupts */
 214         REG_WRITE(ICU_ENABLE_REG, ICU_INT_MASK);
 215
 216         bus_generic_probe(dev);
 217         bus_enumerate_hinted_children(dev);
 218         bus_generic_attach(dev);
 219
 220         return (0);
 221 }
 222
 223 static struct resource *
 224 obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
 225     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
 226 {
 227         struct obio_softc               *sc = device_get_softc(bus);
 228         struct obio_ivar                *ivar = device_get_ivars(child);
 229         struct resource                 *rv;
 230         struct resource_list_entry      *rle;
 231         struct rman                     *rm;
 232         int                              isdefault, needactivate, passthrough;
 233
 234         isdefault = (RMAN_IS_DEFAULT_RANGE(start, end) && count == 1);
 235         needactivate = flags & RF_ACTIVE;
 236         passthrough = (device_get_parent(child) != bus);
 237         rle = NULL;
 238
 239         if (passthrough)
 240                 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type,
 241                     rid, start, end, count, flags));
 242
 243         /*
 244          * If this is an allocation of the "default" range for a given RID,
 245          * and we know what the resources for this device are (ie. they aren't
 246          * maintained by a child bus), then work out the start/end values.
 247          */
 248         if (isdefault) {
 249                 rle = resource_list_find(&ivar->resources, type, *rid);
 250                 if (rle == NULL)
 251                         return (NULL);
 252                 if (rle->res != NULL) {
 253                         panic("%s: resource entry is busy", __func__);
 254                 }
 255                 start = rle->start;
 256                 end = rle->end;
 257                 count = rle->count;
 258         }
 259
 260         switch (type) {
 261         case SYS_RES_IRQ:
 262                 rm = &sc->oba_irq_rman;
 263                 break;
 264         case SYS_RES_MEMORY:
 265                 rm = &sc->oba_mem_rman;
 266                 break;
 267         default:
 268                 printf("%s: unknown resource type %d\n", __func__, type);
 269                 return (0);
 270         }
 271
 272         rv = rman_reserve_resource(rm, start, end, count, flags, child);
 273         if (rv == NULL) {
 274                 printf("%s: could not reserve resource\n", __func__);
 275                 return (0);
 276         }
 277
 278         rman_set_rid(rv, *rid);
 279
 280         if (needactivate) {
 281                 if (bus_activate_resource(child, type, *rid, rv)) {
 282                         printf("%s: could not activate resource\n", __func__);
 283                         rman_release_resource(rv);
 284                         return (0);
 285                 }
 286         }
 287
 288         return (rv);
 289 }
 290
 291 static int
 292 obio_activate_resource(device_t bus, device_t child, int type, int rid,
 293     struct resource *r)
 294 {
 295
 296         /*
 297          * If this is a memory resource, track the direct mapping
 298          * in the uncached MIPS KSEG1 segment.
 299          */
 300         if (type == SYS_RES_MEMORY) {
 301                 void *vaddr;
 302
 303                 vaddr = (void *)MIPS_PHYS_TO_KSEG1((intptr_t)rman_get_start(r));
 304                 rman_set_virtual(r, vaddr);
 305                 rman_set_bustag(r, mips_bus_space_generic);
 306                 rman_set_bushandle(r, (bus_space_handle_t)vaddr);
 307         }
 308
 309         return (rman_activate_resource(r));
 310 }
 311
 312 static int
 313 obio_deactivate_resource(device_t bus, device_t child, int type, int rid,
 314     struct resource *r)
 315 {
 316
 317         return (rman_deactivate_resource(r));
 318 }
 319
 320 static int
 321 obio_release_resource(device_t dev, device_t child, int type,
 322     int rid, struct resource *r)
 323 {
 324         struct resource_list *rl;
 325         struct resource_list_entry *rle;
 326
 327         rl = obio_get_resource_list(dev, child);
 328         if (rl == NULL)
 329                 return (EINVAL);
 330         rle = resource_list_find(rl, type, rid);
 331         if (rle == NULL)
 332                 return (EINVAL);
 333         rman_release_resource(r);
 334         rle->res = NULL;
 335
 336         return (0);
 337 }
 338
 339 static int
 340 obio_setup_intr(device_t dev, device_t child, struct resource *ires,
 341                 int flags, driver_filter_t *filt, driver_intr_t *handler,
 342                 void *arg, void **cookiep)
 343 {
 344         struct obio_softc *sc = device_get_softc(dev);
 345         struct intr_event *event;
 346         int irq, error, priority;
 347         uint32_t irqmask;
 348
 349         irq = rman_get_start(ires);
 350
 351         if (irq >= NIRQS)
 352                 panic("%s: bad irq %d", __func__, irq);
 353
 354         event = sc->sc_eventstab[irq];
 355         if (event == NULL) {
 356                 error = intr_event_create(&event, (void *)irq, 0, irq,
 357                     obio_mask_irq, obio_unmask_irq,
 358                     NULL, NULL, "obio intr%d:", irq);
 359
 360                 sc->sc_eventstab[irq] = event;
 361         }
 362         else
 363                 panic("obio: Can't share IRQs");
 364
 365         intr_event_add_handler(event, device_get_nameunit(child), filt,
 366             handler, arg, intr_priority(flags), flags, cookiep);
 367
 368         irqmask = 1 << irq;
 369         priority = irq_priorities[irq];
 370
 371         if (priority == INTR_FIQ)
 372                 REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) | irqmask);
 373         else
 374                 REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) & ~irqmask);
 375
 376         /* enable */
 377         REG_WRITE(ICU_ENABLE_REG, irqmask);
 378
 379         obio_unmask_irq((void*)irq);
 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, priority;
 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);
 400         priority = irq_priorities[irq];
 401
 402         if (priority == INTR_FIQ)
 403                 REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) & ~irqmask);
 404         else
 405                 REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) | irqmask);
 406
 407         /* disable */
 408         irqmask = REG_READ(ICU_ENABLE_REG);
 409         irqmask &= ~(1 << irq);
 410         REG_WRITE(ICU_ENABLE_REG, irqmask);
 411
 412         result = intr_event_remove_handler(cookie);
 413         if (!result) {
 414                 sc->sc_eventstab[irq] = NULL;
 415         }
 416
 417         return (result);
 418 }
 419
 420 static int
 421 obio_intr(void *arg)
 422 {
 423         struct obio_softc *sc = arg;
 424         struct intr_event *event;
 425         uint32_t irqstat;
 426         int irq;
 427
 428         irqstat = REG_READ(ICU_FIQ_STATUS_REG);
 429         irqstat |= REG_READ(ICU_STATUS_REG);
 430
 431         irq = 0;
 432         while (irqstat != 0) {
 433                 if ((irqstat & 1) == 1) {
 434                         event = sc->sc_eventstab[irq];
 435                         if (!event || TAILQ_EMPTY(&event->ie_handlers))
 436                                 continue;
 437
 438                         /* TODO: pass frame as an argument*/
 439                         /* TODO: log stray interrupt */
 440                         intr_event_handle(event, NULL);
 441                 }
 442
 443                 irq++;
 444                 irqstat >>= 1;
 445         }
 446
 447         return (FILTER_HANDLED);
 448 }
 449
 450 static void
 451 obio_hinted_child(device_t bus, const char *dname, int dunit)
 452 {
 453         device_t                child;
 454         long                    maddr;
 455         int                     msize;
 456         int                     irq;
 457         int                     result;
 458
 459         child = BUS_ADD_CHILD(bus, 0, dname, dunit);
 460
 461         /*
 462          * Set hard-wired resources for hinted child using
 463          * specific RIDs.
 464          */
 465         resource_long_value(dname, dunit, "maddr", &maddr);
 466         resource_int_value(dname, dunit, "msize", &msize);
 467
 468
 469         result = bus_set_resource(child, SYS_RES_MEMORY, 0,
 470             maddr, msize);
 471         if (result != 0)
 472                 device_printf(bus, "warning: bus_set_resource() failed\n");
 473
 474         if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
 475                 result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
 476                 if (result != 0)
 477                         device_printf(bus,
 478                             "warning: bus_set_resource() failed\n");
 479         }
 480 }
 481
 482 static device_t
 483 obio_add_child(device_t bus, u_int order, const char *name, int unit)
 484 {
 485         device_t                child;
 486         struct obio_ivar        *ivar;
 487
 488         ivar = malloc(sizeof(struct obio_ivar), M_DEVBUF, M_WAITOK | M_ZERO);
 489         resource_list_init(&ivar->resources);
 490
 491         child = device_add_child_ordered(bus, order, name, unit);
 492         if (child == NULL) {
 493                 printf("Can't add child %s%d ordered\n", name, unit);
 494                 return (0);
 495         }
 496
 497         device_set_ivars(child, ivar);
 498
 499         return (child);
 500 }
 501
 502 /*
 503  * Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource
 504  * Provides pointer to resource_list for these routines
 505  */
 506 static struct resource_list *
 507 obio_get_resource_list(device_t dev, device_t child)
 508 {
 509         struct obio_ivar *ivar;
 510
 511         ivar = device_get_ivars(child);
 512         return (&(ivar->resources));
 513 }
 514
 515 static device_method_t obio_methods[] = {
 516         DEVMETHOD(bus_activate_resource,        obio_activate_resource),
 517         DEVMETHOD(bus_add_child,                obio_add_child),
 518         DEVMETHOD(bus_alloc_resource,           obio_alloc_resource),
 519         DEVMETHOD(bus_deactivate_resource,      obio_deactivate_resource),
 520         DEVMETHOD(bus_get_resource_list,        obio_get_resource_list),
 521         DEVMETHOD(bus_hinted_child,             obio_hinted_child),
 522         DEVMETHOD(bus_release_resource,         obio_release_resource),
 523         DEVMETHOD(bus_setup_intr,               obio_setup_intr),
 524         DEVMETHOD(bus_teardown_intr,            obio_teardown_intr),
 525         DEVMETHOD(device_attach,                obio_attach),
 526         DEVMETHOD(device_probe,                 obio_probe),
 527         DEVMETHOD(bus_get_resource,             bus_generic_rl_get_resource),
 528         DEVMETHOD(bus_set_resource,             bus_generic_rl_set_resource),
 529
 530         {0, 0},
 531 };
 532
 533 static driver_t obio_driver = {
 534         "obio",
 535         obio_methods,
 536         sizeof(struct obio_softc),
 537 };
 538 static devclass_t obio_devclass;
 539
 540 DRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0);