sys/bus/isa/isa_common.c

   1 /*-
   2  * Copyright (c) 1999 Doug Rabson
   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  * $FreeBSD: src/sys/isa/isa_common.c,v 1.16.2.1 2000/09/16 15:49:52 roger Exp $
  27  * $DragonFly: src/sys/bus/isa/isa_common.c,v 1.5 2004/04/07 05:54:32 dillon Exp $
  28  */
  29 /*
  30  * Modifications for Intel architecture by Garrett A. Wollman.
  31  * Copyright 1998 Massachusetts Institute of Technology
  32  *
  33  * Permission to use, copy, modify, and distribute this software and
  34  * its documentation for any purpose and without fee is hereby
  35  * granted, provided that both the above copyright notice and this
  36  * permission notice appear in all copies, that both the above
  37  * copyright notice and this permission notice appear in all
  38  * supporting documentation, and that the name of M.I.T. not be used
  39  * in advertising or publicity pertaining to distribution of the
  40  * software without specific, written prior permission.  M.I.T. makes
  41  * no representations about the suitability of this software for any
  42  * purpose.  It is provided "as is" without express or implied
  43  * warranty.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
  46  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
  47  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  48  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
  49  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  50  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  51  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  52  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  53  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  54  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  55  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  */
  58
  59 /*
  60  * Parts of the ISA bus implementation common to all architectures.
  61  */
  62
  63 #include <sys/param.h>
  64 #include <sys/systm.h>
  65 #include <sys/kernel.h>
  66 #include <sys/bus.h>
  67 #include <sys/malloc.h>
  68 #include <sys/module.h>
  69 #include <machine/bus.h>
  70 #include <sys/rman.h>
  71
  72 #include <machine/resource.h>
  73
  74 #include "isavar.h"
  75 #include "isa_common.h"
  76 #ifdef __alpha__                /* XXX workaround a stupid warning */
  77 #include "isavar.h"
  78 #endif
  79
  80 static int      isa_print_child         (device_t, device_t);
  81
  82 MALLOC_DEFINE(M_ISADEV, "isadev", "ISA device");
  83
  84 static devclass_t isa_devclass;
  85 static int isa_running;
  86
  87 /*
  88  * At 'probe' time, we add all the devices which we know about to the
  89  * bus.  The generic attach routine will probe and attach them if they
  90  * are alive.
  91  */
  92 static int
  93 isa_probe(device_t dev)
  94 {
  95         device_set_desc(dev, "ISA bus");
  96         isa_init();             /* Allow machdep code to initialise */
  97         return 0;
  98 }
  99
 100 extern device_t isa_bus_device;
 101
 102 static int
 103 isa_attach(device_t dev)
 104 {
 105         /*
 106          * Arrange for isa_probe_children(dev) to be called later. XXX
 107          */
 108         isa_bus_device = dev;
 109         return 0;
 110 }
 111
 112 /*
 113  * Find a working set of memory regions for a child using the ranges
 114  * in *config  and return the regions in *result. Returns non-zero if
 115  * a set of ranges was found.
 116  */
 117 static int
 118 isa_find_memory(device_t child,
 119                 struct isa_config *config,
 120                 struct isa_config *result)
 121 {
 122         int success, i;
 123         struct resource *res[ISA_NMEM];
 124
 125         /*
 126          * First clear out any existing resource definitions.
 127          */
 128         for (i = 0; i < ISA_NMEM; i++) {
 129                 bus_delete_resource(child, SYS_RES_MEMORY, i);
 130                 res[i] = NULL;
 131         }
 132
 133         success = 1;
 134         result->ic_nmem = config->ic_nmem;
 135         for (i = 0; i < config->ic_nmem; i++) {
 136                 u_int32_t start, end, size, align;
 137                 for (start = config->ic_mem[i].ir_start,
 138                              end = config->ic_mem[i].ir_end,
 139                              size = config->ic_mem[i].ir_size,
 140                              align = config->ic_mem[i].ir_align;
 141                      start + size - 1 <= end;
 142                      start += align) {
 143                         bus_set_resource(child, SYS_RES_MEMORY, i,
 144                                          start, size);
 145                         res[i] = bus_alloc_resource(child,
 146                                                     SYS_RES_MEMORY, &i,
 147                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
 148                         if (res[i]) {
 149                                 result->ic_mem[i].ir_start = start;
 150                                 result->ic_mem[i].ir_end = start + size - 1;
 151                                 result->ic_mem[i].ir_size = size;
 152                                 result->ic_mem[i].ir_align = align;
 153                                 break;
 154                         }
 155                 }
 156
 157                 /*
 158                  * If we didn't find a place for memory range i, then
 159                  * give up now.
 160                  */
 161                 if (!res[i]) {
 162                         success = 0;
 163                         break;
 164                 }
 165         }
 166
 167         for (i = 0; i < ISA_NMEM; i++) {
 168                 if (res[i])
 169                         bus_release_resource(child, SYS_RES_MEMORY,
 170                                              i, res[i]);
 171         }
 172
 173         return success;
 174 }
 175
 176 /*
 177  * Find a working set of port regions for a child using the ranges
 178  * in *config  and return the regions in *result. Returns non-zero if
 179  * a set of ranges was found.
 180  */
 181 static int
 182 isa_find_port(device_t child,
 183               struct isa_config *config,
 184               struct isa_config *result)
 185 {
 186         int success, i;
 187         struct resource *res[ISA_NPORT];
 188
 189         /*
 190          * First clear out any existing resource definitions.
 191          */
 192         for (i = 0; i < ISA_NPORT; i++) {
 193                 bus_delete_resource(child, SYS_RES_IOPORT, i);
 194                 res[i] = NULL;
 195         }
 196
 197         success = 1;
 198         result->ic_nport = config->ic_nport;
 199         for (i = 0; i < config->ic_nport; i++) {
 200                 u_int32_t start, end, size, align;
 201                 for (start = config->ic_port[i].ir_start,
 202                              end = config->ic_port[i].ir_end,
 203                              size = config->ic_port[i].ir_size,
 204                              align = config->ic_port[i].ir_align;
 205                      start + size - 1 <= end;
 206                      start += align) {
 207                         bus_set_resource(child, SYS_RES_IOPORT, i,
 208                                          start, size);
 209                         res[i] = bus_alloc_resource(child,
 210                                                     SYS_RES_IOPORT, &i,
 211                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
 212                         if (res[i]) {
 213                                 result->ic_port[i].ir_start = start;
 214                                 result->ic_port[i].ir_end = start + size - 1;
 215                                 result->ic_port[i].ir_size = size;
 216                                 result->ic_port[i].ir_align = align;
 217                                 break;
 218                         }
 219                 }
 220
 221                 /*
 222                  * If we didn't find a place for port range i, then
 223                  * give up now.
 224                  */
 225                 if (!res[i]) {
 226                         success = 0;
 227                         break;
 228                 }
 229         }
 230
 231         for (i = 0; i < ISA_NPORT; i++) {
 232                 if (res[i])
 233                         bus_release_resource(child, SYS_RES_IOPORT,
 234                                              i, res[i]);
 235         }
 236
 237         return success;
 238 }
 239
 240 /*
 241  * Return the index of the first bit in the mask (or -1 if mask is empty.
 242  */
 243 static int
 244 find_first_bit(u_int32_t mask)
 245 {
 246         return ffs(mask) - 1;
 247 }
 248
 249 /*
 250  * Return the index of the next bit in the mask, or -1 if there are no more.
 251  */
 252 static int
 253 find_next_bit(u_int32_t mask, int bit)
 254 {
 255         bit++;
 256         while (bit < 32 && !(mask & (1 << bit)))
 257                 bit++;
 258         if (bit != 32)
 259                 return bit;
 260         return -1;
 261 }
 262
 263 /*
 264  * Find a working set of irqs for a child using the masks in *config
 265  * and return the regions in *result. Returns non-zero if a set of
 266  * irqs was found.
 267  */
 268 static int
 269 isa_find_irq(device_t child,
 270              struct isa_config *config,
 271              struct isa_config *result)
 272 {
 273         int success, i;
 274         struct resource *res[ISA_NIRQ];
 275
 276         /*
 277          * First clear out any existing resource definitions.
 278          */
 279         for (i = 0; i < ISA_NIRQ; i++) {
 280                 bus_delete_resource(child, SYS_RES_IRQ, i);
 281                 res[i] = NULL;
 282         }
 283
 284         success = 1;
 285         result->ic_nirq = config->ic_nirq;
 286         for (i = 0; i < config->ic_nirq; i++) {
 287                 u_int32_t mask = config->ic_irqmask[i];
 288                 int irq;
 289                 for (irq = find_first_bit(mask);
 290                      irq != -1;
 291                      irq = find_next_bit(mask, irq)) {
 292                         bus_set_resource(child, SYS_RES_IRQ, i,
 293                                          irq, 1);
 294                         res[i] = bus_alloc_resource(child,
 295                                                     SYS_RES_IRQ, &i,
 296                                                     0, ~0, 1, 0 /* !RF_ACTIVE */ );
 297                         if (res[i]) {
 298                                 result->ic_irqmask[i] = (1 << irq);
 299                                 break;
 300                         }
 301                 }
 302
 303                 /*
 304                  * If we didn't find a place for irq range i, then
 305                  * give up now.
 306                  */
 307                 if (!res[i]) {
 308                         success = 0;
 309                         break;
 310                 }
 311         }
 312
 313         for (i = 0; i < ISA_NIRQ; i++) {
 314                 if (res[i])
 315                         bus_release_resource(child, SYS_RES_IRQ,
 316                                              i, res[i]);
 317         }
 318
 319         return success;
 320 }
 321
 322 /*
 323  * Find a working set of drqs for a child using the masks in *config
 324  * and return the regions in *result. Returns non-zero if a set of
 325  * drqs was found.
 326  */
 327 static int
 328 isa_find_drq(device_t child,
 329              struct isa_config *config,
 330              struct isa_config *result)
 331 {
 332         int success, i;
 333         struct resource *res[ISA_NDRQ];
 334
 335         /*
 336          * First clear out any existing resource definitions.
 337          */
 338         for (i = 0; i < ISA_NDRQ; i++) {
 339                 bus_delete_resource(child, SYS_RES_DRQ, i);
 340                 res[i] = NULL;
 341         }
 342
 343         success = 1;
 344         result->ic_ndrq = config->ic_ndrq;
 345         for (i = 0; i < config->ic_ndrq; i++) {
 346                 u_int32_t mask = config->ic_drqmask[i];
 347                 int drq;
 348                 for (drq = find_first_bit(mask);
 349                      drq != -1;
 350                      drq = find_next_bit(mask, drq)) {
 351                         bus_set_resource(child, SYS_RES_DRQ, i,
 352                                          drq, 1);
 353                         res[i] = bus_alloc_resource(child,
 354                                                     SYS_RES_DRQ, &i,
 355                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
 356                         if (res[i]) {
 357                                 result->ic_drqmask[i] = (1 << drq);
 358                                 break;
 359                         }
 360                 }
 361
 362                 /*
 363                  * If we didn't find a place for drq range i, then
 364                  * give up now.
 365                  */
 366                 if (!res[i]) {
 367                         success = 0;
 368                         break;
 369                 }
 370         }
 371
 372         for (i = 0; i < ISA_NDRQ; i++) {
 373                 if (res[i])
 374                         bus_release_resource(child, SYS_RES_DRQ,
 375                                              i, res[i]);
 376         }
 377
 378         return success;
 379 }
 380
 381 /*
 382  * Attempt to find a working set of resources for a device. Return
 383  * non-zero if a working configuration is found.
 384  */
 385 static int
 386 isa_assign_resources(device_t child)
 387 {
 388         struct isa_device *idev = DEVTOISA(child);
 389         struct isa_config_entry *ice;
 390         struct isa_config config;
 391
 392         bzero(&config, sizeof config);
 393         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
 394                 if (!isa_find_memory(child, &ice->ice_config, &config))
 395                         continue;
 396                 if (!isa_find_port(child, &ice->ice_config, &config))
 397                         continue;
 398                 if (!isa_find_irq(child, &ice->ice_config, &config))
 399                         continue;
 400                 if (!isa_find_drq(child, &ice->ice_config, &config))
 401                         continue;
 402
 403                 /*
 404                  * A working configuration was found enable the device
 405                  * with this configuration.
 406                  */
 407                 if (idev->id_config_cb) {
 408                         idev->id_config_cb(idev->id_config_arg,
 409                                            &config, 1);
 410                         return 1;
 411                 }
 412         }
 413
 414         /*
 415          * Disable the device.
 416          */
 417         bus_print_child_header(device_get_parent(child), child);
 418         printf(" can't assign resources\n");
 419         if (bootverbose)
 420             isa_print_child(device_get_parent(child), child);
 421         bzero(&config, sizeof config);
 422         if (idev->id_config_cb)
 423                 idev->id_config_cb(idev->id_config_arg, &config, 0);
 424         device_disable(child);
 425
 426         return 0;
 427 }
 428
 429 /*
 430  * Called after other devices have initialised to probe for isa devices.
 431  */
 432 void
 433 isa_probe_children(device_t dev)
 434 {
 435         device_t *children;
 436         int nchildren, i;
 437
 438         /*
 439          * Create all the children by calling driver's identify methods.
 440          */
 441         bus_generic_probe(dev);
 442
 443         if (device_get_children(dev, &children, &nchildren))
 444                 return;
 445
 446         /*
 447          * First disable all pnp devices so that they don't get
 448          * matched by legacy probes.
 449          */
 450         if (bootverbose)
 451                 printf("isa_probe_children: disabling PnP devices\n");
 452         for (i = 0; i < nchildren; i++) {
 453                 device_t child = children[i];
 454                 struct isa_device *idev = DEVTOISA(child);
 455                 struct isa_config config;
 456
 457                 bzero(&config, sizeof config);
 458                 if (idev->id_config_cb)
 459                         idev->id_config_cb(idev->id_config_arg, &config, 0);
 460         }
 461
 462         /*
 463          * Next probe all non-pnp devices so that they claim their
 464          * resources first.
 465          */
 466         if (bootverbose)
 467                 printf("isa_probe_children: probing non-PnP devices\n");
 468         for (i = 0; i < nchildren; i++) {
 469                 device_t child = children[i];
 470                 struct isa_device *idev = DEVTOISA(child);
 471
 472                 if (TAILQ_FIRST(&idev->id_configs))
 473                         continue;
 474
 475                 device_probe_and_attach(child);
 476         }
 477
 478         /*
 479          * Finally assign resource to pnp devices and probe them.
 480          */
 481         if (bootverbose)
 482                 printf("isa_probe_children: probing PnP devices\n");
 483         for (i = 0; i < nchildren; i++) {
 484                 device_t child = children[i];
 485                 struct isa_device* idev = DEVTOISA(child);
 486
 487                 if (!TAILQ_FIRST(&idev->id_configs))
 488                         continue;
 489
 490                 if (isa_assign_resources(child)) {
 491                         struct resource_list *rl = &idev->id_resources;
 492                         struct resource_list_entry *rle;
 493
 494                         device_probe_and_attach(child);
 495
 496                         /*
 497                          * Claim any unallocated resources to keep other
 498                          * devices from using them.
 499                          */
 500                         SLIST_FOREACH(rle, rl, link) {
 501                                 if (!rle->res) {
 502                                         int rid = rle->rid;
 503                                         resource_list_alloc(rl, dev, child,
 504                                                             rle->type,
 505                                                             &rid,
 506                                                             0, ~0, 1,
 507                                                             0 /* !RF_ACTIVE */);
 508                                 }
 509                         }
 510                 }
 511         }
 512
 513         free(children, M_TEMP);
 514
 515         isa_running = 1;
 516 }
 517
 518 /*
 519  * Add a new child with default ivars.
 520  */
 521 static device_t
 522 isa_add_child(device_t dev, int order, const char *name, int unit)
 523 {
 524         device_t child;
 525         struct  isa_device *idev;
 526
 527         idev = malloc(sizeof(struct isa_device), M_ISADEV, M_WAITOK | M_ZERO);
 528
 529         resource_list_init(&idev->id_resources);
 530         TAILQ_INIT(&idev->id_configs);
 531
 532         child = device_add_child_ordered(dev, order, name, unit);
 533         device_set_ivars(child, idev);
 534
 535         return child;
 536 }
 537
 538 static int
 539 isa_print_resources(struct resource_list *rl, const char *name, int type,
 540                     int count, const char *format)
 541 {
 542         struct resource_list_entry *rle;
 543         int printed;
 544         int i, retval = 0;;
 545
 546         printed = 0;
 547         for (i = 0; i < count; i++) {
 548                 rle = resource_list_find(rl, type, i);
 549                 if (rle) {
 550                         if (printed == 0)
 551                                 retval += printf(" %s ", name);
 552                         else if (printed > 0)
 553                                 retval += printf(",");
 554                         printed++;
 555                         retval += printf(format, rle->start);
 556                         if (rle->count > 1) {
 557                                 retval += printf("-");
 558                                 retval += printf(format,
 559                                                  rle->start + rle->count - 1);
 560                         }
 561                 } else if (i > 3) {
 562                         /* check the first few regardless */
 563                         break;
 564                 }
 565         }
 566         return retval;
 567 }
 568
 569 static int
 570 isa_print_all_resources(device_t dev)
 571 {
 572         struct  isa_device *idev = DEVTOISA(dev);
 573         struct resource_list *rl = &idev->id_resources;
 574         int retval = 0;
 575
 576         if (SLIST_FIRST(rl) || device_get_flags(dev))
 577                 retval += printf(" at");
 578
 579         retval += isa_print_resources(rl, "port", SYS_RES_IOPORT,
 580                                       ISA_NPORT, "%#lx");
 581         retval += isa_print_resources(rl, "iomem", SYS_RES_MEMORY,
 582                                       ISA_NMEM, "%#lx");
 583         retval += isa_print_resources(rl, "irq", SYS_RES_IRQ,
 584                                       ISA_NIRQ, "%ld");
 585         retval += isa_print_resources(rl, "drq", SYS_RES_DRQ,
 586                                       ISA_NDRQ, "%ld");
 587         if (device_get_flags(dev))
 588                 retval += printf(" flags %#x", device_get_flags(dev));
 589
 590         return retval;
 591 }
 592
 593 static int
 594 isa_print_child(device_t bus, device_t dev)
 595 {
 596         int retval = 0;
 597
 598         retval += bus_print_child_header(bus, dev);
 599         retval += isa_print_all_resources(dev);
 600         retval += bus_print_child_footer(bus, dev);
 601
 602         return (retval);
 603 }
 604
 605 static void
 606 isa_probe_nomatch(device_t dev, device_t child)
 607 {
 608         if (bootverbose) {
 609                 bus_print_child_header(dev, child);
 610                 printf(" failed to probe");
 611                 isa_print_all_resources(child);
 612                 bus_print_child_footer(dev, child);
 613         }
 614
 615         return;
 616 }
 617
 618 static int
 619 isa_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
 620 {
 621         struct isa_device* idev = DEVTOISA(dev);
 622         struct resource_list *rl = &idev->id_resources;
 623         struct resource_list_entry *rle;
 624
 625         switch (index) {
 626         case ISA_IVAR_PORT_0:
 627                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
 628                 if (rle)
 629                         *result = rle->start;
 630                 else
 631                         *result = -1;
 632                 break;
 633
 634         case ISA_IVAR_PORT_1:
 635                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
 636                 if (rle)
 637                         *result = rle->start;
 638                 else
 639                         *result = -1;
 640                 break;
 641
 642         case ISA_IVAR_PORTSIZE_0:
 643                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
 644                 if (rle)
 645                         *result = rle->count;
 646                 else
 647                         *result = 0;
 648                 break;
 649
 650         case ISA_IVAR_PORTSIZE_1:
 651                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
 652                 if (rle)
 653                         *result = rle->count;
 654                 else
 655                         *result = 0;
 656                 break;
 657
 658         case ISA_IVAR_MADDR_0:
 659                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
 660                 if (rle)
 661                         *result = rle->start;
 662                 else
 663                         *result = -1;
 664                 break;
 665
 666         case ISA_IVAR_MADDR_1:
 667                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
 668                 if (rle)
 669                         *result = rle->start;
 670                 else
 671                         *result = -1;
 672                 break;
 673
 674         case ISA_IVAR_MSIZE_0:
 675                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
 676                 if (rle)
 677                         *result = rle->count;
 678                 else
 679                         *result = 0;
 680                 break;
 681
 682         case ISA_IVAR_MSIZE_1:
 683                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
 684                 if (rle)
 685                         *result = rle->count;
 686                 else
 687                         *result = 0;
 688                 break;
 689
 690         case ISA_IVAR_IRQ_0:
 691                 rle = resource_list_find(rl, SYS_RES_IRQ, 0);
 692                 if (rle)
 693                         *result = rle->start;
 694                 else
 695                         *result = -1;
 696                 break;
 697
 698         case ISA_IVAR_IRQ_1:
 699                 rle = resource_list_find(rl, SYS_RES_IRQ, 1);
 700                 if (rle)
 701                         *result = rle->start;
 702                 else
 703                         *result = -1;
 704                 break;
 705
 706         case ISA_IVAR_DRQ_0:
 707                 rle = resource_list_find(rl, SYS_RES_DRQ, 0);
 708                 if (rle)
 709                         *result = rle->start;
 710                 else
 711                         *result = -1;
 712                 break;
 713
 714         case ISA_IVAR_DRQ_1:
 715                 rle = resource_list_find(rl, SYS_RES_DRQ, 1);
 716                 if (rle)
 717                         *result = rle->start;
 718                 else
 719                         *result = -1;
 720                 break;
 721
 722         case ISA_IVAR_VENDORID:
 723                 *result = idev->id_vendorid;
 724                 break;
 725
 726         case ISA_IVAR_SERIAL:
 727                 *result = idev->id_serial;
 728                 break;
 729
 730         case ISA_IVAR_LOGICALID:
 731                 *result = idev->id_logicalid;
 732                 break;
 733
 734         case ISA_IVAR_COMPATID:
 735                 *result = idev->id_compatid;
 736                 break;
 737
 738         default:
 739                 return ENOENT;
 740         }
 741
 742         return 0;
 743 }
 744
 745 static int
 746 isa_write_ivar(device_t bus, device_t dev,
 747                int index, uintptr_t value)
 748 {
 749         struct isa_device* idev = DEVTOISA(dev);
 750
 751         switch (index) {
 752         case ISA_IVAR_PORT_0:
 753         case ISA_IVAR_PORT_1:
 754         case ISA_IVAR_PORTSIZE_0:
 755         case ISA_IVAR_PORTSIZE_1:
 756         case ISA_IVAR_MADDR_0:
 757         case ISA_IVAR_MADDR_1:
 758         case ISA_IVAR_MSIZE_0:
 759         case ISA_IVAR_MSIZE_1:
 760         case ISA_IVAR_IRQ_0:
 761         case ISA_IVAR_IRQ_1:
 762         case ISA_IVAR_DRQ_0:
 763         case ISA_IVAR_DRQ_1:
 764                 return EINVAL;
 765
 766         case ISA_IVAR_VENDORID:
 767                 idev->id_vendorid = value;
 768                 break;
 769
 770         case ISA_IVAR_SERIAL:
 771                 idev->id_serial = value;
 772                 break;
 773
 774         case ISA_IVAR_LOGICALID:
 775                 idev->id_logicalid = value;
 776                 break;
 777
 778         case ISA_IVAR_COMPATID:
 779                 idev->id_compatid = value;
 780                 break;
 781
 782         default:
 783                 return (ENOENT);
 784         }
 785
 786         return (0);
 787 }
 788
 789 /*
 790  * Free any resources which the driver missed or which we were holding for
 791  * it (see isa_probe_children).
 792  */
 793 static void
 794 isa_child_detached(device_t dev, device_t child)
 795 {
 796         struct isa_device* idev = DEVTOISA(child);
 797         struct resource_list *rl = &idev->id_resources;
 798         struct resource_list_entry *rle;
 799
 800         if (TAILQ_FIRST(&idev->id_configs)) {
 801                 /*
 802                  * Claim any unallocated resources to keep other
 803                  * devices from using them.
 804                  */
 805                 SLIST_FOREACH(rle, rl, link) {
 806                         if (!rle->res) {
 807                                 int rid = rle->rid;
 808                                 resource_list_alloc(rl, dev, child,
 809                                                     rle->type,
 810                                                     &rid, 0, ~0, 1, 0);
 811                         }
 812                 }
 813         }
 814 }
 815
 816 static void
 817 isa_driver_added(device_t dev, driver_t *driver)
 818 {
 819         device_t *children;
 820         int nchildren, i;
 821
 822         /*
 823          * Don't do anything if drivers are dynamically
 824          * added during autoconfiguration (cf. ymf724).
 825          * since that would end up calling identify
 826          * twice.
 827          */
 828         if (!isa_running)
 829                 return;
 830
 831         DEVICE_IDENTIFY(driver, dev);
 832         if (device_get_children(dev, &children, &nchildren))
 833                 return;
 834
 835         for (i = 0; i < nchildren; i++) {
 836                 device_t child = children[i];
 837                 struct isa_device *idev = DEVTOISA(child);
 838                 struct resource_list *rl = &idev->id_resources;
 839                 struct resource_list_entry *rle;
 840
 841                 if (device_get_state(child) != DS_NOTPRESENT)
 842                         continue;
 843                 if (!device_is_enabled(child))
 844                         continue;
 845
 846                 /*
 847                  * Free resources which we were holding on behalf of
 848                  * the device.
 849                  */
 850                 SLIST_FOREACH(rle, &idev->id_resources, link) {
 851                         if (rle->res)
 852                                 resource_list_release(rl, dev, child,
 853                                                       rle->type,
 854                                                       rle->rid,
 855                                                       rle->res);
 856                 }
 857
 858                 if (TAILQ_FIRST(&idev->id_configs))
 859                         if (!isa_assign_resources(child))
 860                                 continue;
 861
 862                 device_probe_and_attach(child);
 863
 864                 if (TAILQ_FIRST(&idev->id_configs)) {
 865                         /*
 866                          * Claim any unallocated resources to keep other
 867                          * devices from using them.
 868                          */
 869                         SLIST_FOREACH(rle, rl, link) {
 870                                 if (!rle->res) {
 871                                         int rid = rle->rid;
 872                                         resource_list_alloc(rl, dev, child,
 873                                                             rle->type,
 874                                                             &rid,
 875                                                             0, ~0, 1,
 876                                                             0 /* !RF_ACTIVE */);
 877                                 }
 878                         }
 879                 }
 880         }
 881
 882         free(children, M_TEMP);
 883 }
 884
 885 static int
 886 isa_set_resource(device_t dev, device_t child, int type, int rid,
 887                  u_long start, u_long count)
 888 {
 889         struct isa_device* idev = DEVTOISA(child);
 890         struct resource_list *rl = &idev->id_resources;
 891
 892         if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY
 893             && type != SYS_RES_IRQ && type != SYS_RES_DRQ)
 894                 return EINVAL;
 895         if (rid < 0)
 896                 return EINVAL;
 897         if (type == SYS_RES_IOPORT && rid >= ISA_NPORT)
 898                 return EINVAL;
 899         if (type == SYS_RES_MEMORY && rid >= ISA_NMEM)
 900                 return EINVAL;
 901         if (type == SYS_RES_IRQ && rid >= ISA_NIRQ)
 902                 return EINVAL;
 903         if (type == SYS_RES_DRQ && rid >= ISA_NDRQ)
 904                 return EINVAL;
 905
 906         resource_list_add(rl, type, rid, start, start + count - 1, count);
 907
 908         return 0;
 909 }
 910
 911 static int
 912 isa_get_resource(device_t dev, device_t child, int type, int rid,
 913                  u_long *startp, u_long *countp)
 914 {
 915         struct isa_device* idev = DEVTOISA(child);
 916         struct resource_list *rl = &idev->id_resources;
 917         struct resource_list_entry *rle;
 918
 919         rle = resource_list_find(rl, type, rid);
 920         if (!rle)
 921                 return ENOENT;
 922
 923         if (startp)
 924                 *startp = rle->start;
 925         if (countp)
 926                 *countp = rle->count;
 927
 928         return 0;
 929 }
 930
 931 static void
 932 isa_delete_resource(device_t dev, device_t child, int type, int rid)
 933 {
 934         struct isa_device* idev = DEVTOISA(child);
 935         struct resource_list *rl = &idev->id_resources;
 936         resource_list_delete(rl, type, rid);
 937 }
 938
 939 static int
 940 isa_add_config(device_t dev, device_t child,
 941                int priority, struct isa_config *config)
 942 {
 943         struct isa_device* idev = DEVTOISA(child);
 944         struct isa_config_entry *newice, *ice;
 945
 946         newice = malloc(sizeof *ice, M_DEVBUF, M_WAITOK);
 947         newice->ice_priority = priority;
 948         newice->ice_config = *config;
 949
 950         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
 951                 if (ice->ice_priority > priority)
 952                         break;
 953         }
 954         if (ice)
 955                 TAILQ_INSERT_BEFORE(ice, newice, ice_link);
 956         else
 957                 TAILQ_INSERT_TAIL(&idev->id_configs, newice, ice_link);
 958
 959         return 0;
 960 }
 961
 962 static void
 963 isa_set_config_callback(device_t dev, device_t child,
 964                         isa_config_cb *fn, void *arg)
 965 {
 966         struct isa_device* idev = DEVTOISA(child);
 967
 968         idev->id_config_cb = fn;
 969         idev->id_config_arg = arg;
 970 }
 971
 972 static int
 973 isa_pnp_probe(device_t dev, device_t child, struct isa_pnp_id *ids)
 974 {
 975         struct isa_device* idev = DEVTOISA(child);
 976
 977         if (!idev->id_vendorid)
 978                 return ENOENT;
 979
 980         while (ids->ip_id) {
 981                 /*
 982                  * Really ought to support >1 compat id per device.
 983                  */
 984                 if (idev->id_logicalid == ids->ip_id
 985                     || idev->id_compatid == ids->ip_id) {
 986                         if (ids->ip_desc)
 987                                 device_set_desc(child, ids->ip_desc);
 988                         return 0;
 989                 }
 990                 ids++;
 991         }
 992
 993         return ENXIO;
 994 }
 995
 996 static device_method_t isa_methods[] = {
 997         /* Device interface */
 998         DEVMETHOD(device_probe,         isa_probe),
 999         DEVMETHOD(device_attach,        isa_attach),
1000         DEVMETHOD(device_detach,        bus_generic_detach),
1001         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1002         DEVMETHOD(device_suspend,       bus_generic_suspend),
1003         DEVMETHOD(device_resume,        bus_generic_resume),
1004
1005         /* Bus interface */
1006         DEVMETHOD(bus_add_child,        isa_add_child),
1007         DEVMETHOD(bus_print_child,      isa_print_child),
1008         DEVMETHOD(bus_probe_nomatch,    isa_probe_nomatch),
1009         DEVMETHOD(bus_read_ivar,        isa_read_ivar),
1010         DEVMETHOD(bus_write_ivar,       isa_write_ivar),
1011         DEVMETHOD(bus_child_detached,   isa_child_detached),
1012         DEVMETHOD(bus_driver_added,     isa_driver_added),
1013         DEVMETHOD(bus_alloc_resource,   isa_alloc_resource),
1014         DEVMETHOD(bus_release_resource, isa_release_resource),
1015         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
1016         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
1017         DEVMETHOD(bus_setup_intr,       isa_setup_intr),
1018         DEVMETHOD(bus_teardown_intr,    isa_teardown_intr),
1019         DEVMETHOD(bus_set_resource,     isa_set_resource),
1020         DEVMETHOD(bus_get_resource,     isa_get_resource),
1021         DEVMETHOD(bus_delete_resource,  isa_delete_resource),
1022
1023         /* ISA interface */
1024         DEVMETHOD(isa_add_config,       isa_add_config),
1025         DEVMETHOD(isa_set_config_callback, isa_set_config_callback),
1026         DEVMETHOD(isa_pnp_probe,        isa_pnp_probe),
1027
1028         { 0, 0 }
1029 };
1030
1031 static driver_t isa_driver = {
1032         "isa",
1033         isa_methods,
1034         1,                      /* no softc */
1035 };
1036
1037 /*
1038  * ISA can be attached to a PCI-ISA bridge or directly to the nexus.
1039  */
1040 DRIVER_MODULE(isa, isab, isa_driver, isa_devclass, 0, 0);
1041 #ifdef __i386__
1042 DRIVER_MODULE(isa, nexus, isa_driver, isa_devclass, 0, 0);
1043 #endif
1044