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 1.7 2005/08/04 15:38:58 drhodus 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
  77 static int      isa_print_child         (device_t, device_t);
  78
  79 MALLOC_DEFINE(M_ISADEV, "isadev", "ISA device");
  80
  81 static devclass_t isa_devclass;
  82 static int isa_running;
  83
  84 /*
  85  * At 'probe' time, we add all the devices which we know about to the
  86  * bus.  The generic attach routine will probe and attach them if they
  87  * are alive.
  88  */
  89 static int
  90 isa_probe(device_t dev)
  91 {
  92         device_set_desc(dev, "ISA bus");
  93         isa_init();             /* Allow machdep code to initialise */
  94         return 0;
  95 }
  96
  97 extern device_t isa_bus_device;
  98
  99 static int
 100 isa_attach(device_t dev)
 101 {
 102         /*
 103          * Arrange for isa_probe_children(dev) to be called later. XXX
 104          */
 105         isa_bus_device = dev;
 106         return 0;
 107 }
 108
 109 /*
 110  * Find a working set of memory regions for a child using the ranges
 111  * in *config  and return the regions in *result. Returns non-zero if
 112  * a set of ranges was found.
 113  */
 114 static int
 115 isa_find_memory(device_t child,
 116                 struct isa_config *config,
 117                 struct isa_config *result)
 118 {
 119         int success, i;
 120         struct resource *res[ISA_NMEM];
 121
 122         /*
 123          * First clear out any existing resource definitions.
 124          */
 125         for (i = 0; i < ISA_NMEM; i++) {
 126                 bus_delete_resource(child, SYS_RES_MEMORY, i);
 127                 res[i] = NULL;
 128         }
 129
 130         success = 1;
 131         result->ic_nmem = config->ic_nmem;
 132         for (i = 0; i < config->ic_nmem; i++) {
 133                 u_int32_t start, end, size, align;
 134                 for (start = config->ic_mem[i].ir_start,
 135                              end = config->ic_mem[i].ir_end,
 136                              size = config->ic_mem[i].ir_size,
 137                              align = config->ic_mem[i].ir_align;
 138                      start + size - 1 <= end;
 139                      start += align) {
 140                         bus_set_resource(child, SYS_RES_MEMORY, i,
 141                                          start, size);
 142                         res[i] = bus_alloc_resource(child,
 143                                                     SYS_RES_MEMORY, &i,
 144                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
 145                         if (res[i]) {
 146                                 result->ic_mem[i].ir_start = start;
 147                                 result->ic_mem[i].ir_end = start + size - 1;
 148                                 result->ic_mem[i].ir_size = size;
 149                                 result->ic_mem[i].ir_align = align;
 150                                 break;
 151                         }
 152                 }
 153
 154                 /*
 155                  * If we didn't find a place for memory range i, then
 156                  * give up now.
 157                  */
 158                 if (!res[i]) {
 159                         success = 0;
 160                         break;
 161                 }
 162         }
 163
 164         for (i = 0; i < ISA_NMEM; i++) {
 165                 if (res[i])
 166                         bus_release_resource(child, SYS_RES_MEMORY,
 167                                              i, res[i]);
 168         }
 169
 170         return success;
 171 }
 172
 173 /*
 174  * Find a working set of port regions for a child using the ranges
 175  * in *config  and return the regions in *result. Returns non-zero if
 176  * a set of ranges was found.
 177  */
 178 static int
 179 isa_find_port(device_t child,
 180               struct isa_config *config,
 181               struct isa_config *result)
 182 {
 183         int success, i;
 184         struct resource *res[ISA_NPORT];
 185
 186         /*
 187          * First clear out any existing resource definitions.
 188          */
 189         for (i = 0; i < ISA_NPORT; i++) {
 190                 bus_delete_resource(child, SYS_RES_IOPORT, i);
 191                 res[i] = NULL;
 192         }
 193
 194         success = 1;
 195         result->ic_nport = config->ic_nport;
 196         for (i = 0; i < config->ic_nport; i++) {
 197                 u_int32_t start, end, size, align;
 198                 for (start = config->ic_port[i].ir_start,
 199                              end = config->ic_port[i].ir_end,
 200                              size = config->ic_port[i].ir_size,
 201                              align = config->ic_port[i].ir_align;
 202                      start + size - 1 <= end;
 203                      start += align) {
 204                         bus_set_resource(child, SYS_RES_IOPORT, i,
 205                                          start, size);
 206                         res[i] = bus_alloc_resource(child,
 207                                                     SYS_RES_IOPORT, &i,
 208                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
 209                         if (res[i]) {
 210                                 result->ic_port[i].ir_start = start;
 211                                 result->ic_port[i].ir_end = start + size - 1;
 212                                 result->ic_port[i].ir_size = size;
 213                                 result->ic_port[i].ir_align = align;
 214                                 break;
 215                         }
 216                 }
 217
 218                 /*
 219                  * If we didn't find a place for port range i, then
 220                  * give up now.
 221                  */
 222                 if (!res[i]) {
 223                         success = 0;
 224                         break;
 225                 }
 226         }
 227
 228         for (i = 0; i < ISA_NPORT; i++) {
 229                 if (res[i])
 230                         bus_release_resource(child, SYS_RES_IOPORT,
 231                                              i, res[i]);
 232         }
 233
 234         return success;
 235 }
 236
 237 /*
 238  * Return the index of the first bit in the mask (or -1 if mask is empty.
 239  */
 240 static int
 241 find_first_bit(u_int32_t mask)
 242 {
 243         return ffs(mask) - 1;
 244 }
 245
 246 /*
 247  * Return the index of the next bit in the mask, or -1 if there are no more.
 248  */
 249 static int
 250 find_next_bit(u_int32_t mask, int bit)
 251 {
 252         bit++;
 253         while (bit < 32 && !(mask & (1 << bit)))
 254                 bit++;
 255         if (bit != 32)
 256                 return bit;
 257         return -1;
 258 }
 259
 260 /*
 261  * Find a working set of irqs for a child using the masks in *config
 262  * and return the regions in *result. Returns non-zero if a set of
 263  * irqs was found.
 264  */
 265 static int
 266 isa_find_irq(device_t child,
 267              struct isa_config *config,
 268              struct isa_config *result)
 269 {
 270         int success, i;
 271         struct resource *res[ISA_NIRQ];
 272
 273         /*
 274          * First clear out any existing resource definitions.
 275          */
 276         for (i = 0; i < ISA_NIRQ; i++) {
 277                 bus_delete_resource(child, SYS_RES_IRQ, i);
 278                 res[i] = NULL;
 279         }
 280
 281         success = 1;
 282         result->ic_nirq = config->ic_nirq;
 283         for (i = 0; i < config->ic_nirq; i++) {
 284                 u_int32_t mask = config->ic_irqmask[i];
 285                 int irq;
 286                 for (irq = find_first_bit(mask);
 287                      irq != -1;
 288                      irq = find_next_bit(mask, irq)) {
 289                         bus_set_resource(child, SYS_RES_IRQ, i,
 290                                          irq, 1);
 291                         res[i] = bus_alloc_resource(child,
 292                                                     SYS_RES_IRQ, &i,
 293                                                     0, ~0, 1, 0 /* !RF_ACTIVE */ );
 294                         if (res[i]) {
 295                                 result->ic_irqmask[i] = (1 << irq);
 296                                 break;
 297                         }
 298                 }
 299
 300                 /*
 301                  * If we didn't find a place for irq range i, then
 302                  * give up now.
 303                  */
 304                 if (!res[i]) {
 305                         success = 0;
 306                         break;
 307                 }
 308         }
 309
 310         for (i = 0; i < ISA_NIRQ; i++) {
 311                 if (res[i])
 312                         bus_release_resource(child, SYS_RES_IRQ,
 313                                              i, res[i]);
 314         }
 315
 316         return success;
 317 }
 318
 319 /*
 320  * Find a working set of drqs for a child using the masks in *config
 321  * and return the regions in *result. Returns non-zero if a set of
 322  * drqs was found.
 323  */
 324 static int
 325 isa_find_drq(device_t child,
 326              struct isa_config *config,
 327              struct isa_config *result)
 328 {
 329         int success, i;
 330         struct resource *res[ISA_NDRQ];
 331
 332         /*
 333          * First clear out any existing resource definitions.
 334          */
 335         for (i = 0; i < ISA_NDRQ; i++) {
 336                 bus_delete_resource(child, SYS_RES_DRQ, i);
 337                 res[i] = NULL;
 338         }
 339
 340         success = 1;
 341         result->ic_ndrq = config->ic_ndrq;
 342         for (i = 0; i < config->ic_ndrq; i++) {
 343                 u_int32_t mask = config->ic_drqmask[i];
 344                 int drq;
 345                 for (drq = find_first_bit(mask);
 346                      drq != -1;
 347                      drq = find_next_bit(mask, drq)) {
 348                         bus_set_resource(child, SYS_RES_DRQ, i,
 349                                          drq, 1);
 350                         res[i] = bus_alloc_resource(child,
 351                                                     SYS_RES_DRQ, &i,
 352                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
 353                         if (res[i]) {
 354                                 result->ic_drqmask[i] = (1 << drq);
 355                                 break;
 356                         }
 357                 }
 358
 359                 /*
 360                  * If we didn't find a place for drq range i, then
 361                  * give up now.
 362                  */
 363                 if (!res[i]) {
 364                         success = 0;
 365                         break;
 366                 }
 367         }
 368
 369         for (i = 0; i < ISA_NDRQ; i++) {
 370                 if (res[i])
 371                         bus_release_resource(child, SYS_RES_DRQ,
 372                                              i, res[i]);
 373         }
 374
 375         return success;
 376 }
 377
 378 /*
 379  * Attempt to find a working set of resources for a device. Return
 380  * non-zero if a working configuration is found.
 381  */
 382 static int
 383 isa_assign_resources(device_t child)
 384 {
 385         struct isa_device *idev = DEVTOISA(child);
 386         struct isa_config_entry *ice;
 387         struct isa_config config;
 388         char *reason = "Empty ISA id_configs";
 389
 390         bzero(&config, sizeof config);
 391         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
 392                 reason = "memory";
 393                 if (!isa_find_memory(child, &ice->ice_config, &config))
 394                         continue;
 395                 reason = "port";
 396                 if (!isa_find_port(child, &ice->ice_config, &config))
 397                         continue;
 398                 reason = "irq";
 399                 if (!isa_find_irq(child, &ice->ice_config, &config))
 400                         continue;
 401                 reason = "drq";
 402                 if (!isa_find_drq(child, &ice->ice_config, &config))
 403                         continue;
 404
 405                 /*
 406                  * A working configuration was found enable the device
 407                  * with this configuration.
 408                  */
 409                 reason = "no callback";
 410                 if (idev->id_config_cb) {
 411                         idev->id_config_cb(idev->id_config_arg,
 412                                            &config, 1);
 413                         return 1;
 414                 }
 415         }
 416
 417         /*
 418          * Disable the device.
 419          */
 420         bus_print_child_header(device_get_parent(child), child);
 421         printf(" can't assign resources (%s)\n", reason);
 422         if (bootverbose)
 423             isa_print_child(device_get_parent(child), child);
 424         bzero(&config, sizeof config);
 425         if (idev->id_config_cb)
 426                 idev->id_config_cb(idev->id_config_arg, &config, 0);
 427         device_disable(child);
 428
 429         return 0;
 430 }
 431
 432 /*
 433  * Called after other devices have initialised to probe for isa devices.
 434  */
 435 void
 436 isa_probe_children(device_t dev)
 437 {
 438         device_t *children;
 439         int nchildren, i;
 440
 441         /*
 442          * Create all the children by calling driver's identify methods.
 443          */
 444         bus_generic_probe(dev);
 445
 446         if (device_get_children(dev, &children, &nchildren))
 447                 return;
 448
 449         /*
 450          * First disable all pnp devices so that they don't get
 451          * matched by legacy probes.
 452          */
 453         if (bootverbose)
 454                 printf("isa_probe_children: disabling PnP devices\n");
 455         for (i = 0; i < nchildren; i++) {
 456                 device_t child = children[i];
 457                 struct isa_device *idev = DEVTOISA(child);
 458                 struct isa_config config;
 459
 460                 bzero(&config, sizeof config);
 461                 if (idev->id_config_cb)
 462                         idev->id_config_cb(idev->id_config_arg, &config, 0);
 463         }
 464
 465         /*
 466          * Next probe all non-pnp devices so that they claim their
 467          * resources first.
 468          */
 469         if (bootverbose)
 470                 printf("isa_probe_children: probing non-PnP devices\n");
 471         for (i = 0; i < nchildren; i++) {
 472                 device_t child = children[i];
 473                 struct isa_device *idev = DEVTOISA(child);
 474
 475                 if (TAILQ_FIRST(&idev->id_configs))
 476                         continue;
 477
 478                 device_probe_and_attach(child);
 479         }
 480
 481         /*
 482          * Finally assign resource to pnp devices and probe them.
 483          */
 484         if (bootverbose)
 485                 printf("isa_probe_children: probing PnP devices\n");
 486         for (i = 0; i < nchildren; i++) {
 487                 device_t child = children[i];
 488                 struct isa_device* idev = DEVTOISA(child);
 489
 490                 if (!TAILQ_FIRST(&idev->id_configs))
 491                         continue;
 492
 493                 if (isa_assign_resources(child)) {
 494                         struct resource_list *rl = &idev->id_resources;
 495                         struct resource_list_entry *rle;
 496
 497                         device_probe_and_attach(child);
 498
 499                         /*
 500                          * Claim any unallocated resources to keep other
 501                          * devices from using them.
 502                          */
 503                         SLIST_FOREACH(rle, rl, link) {
 504                                 if (!rle->res) {
 505                                         int rid = rle->rid;
 506                                         resource_list_alloc(rl, dev, child,
 507                                                             rle->type,
 508                                                             &rid,
 509                                                             0, ~0, 1,
 510                                                             0 /* !RF_ACTIVE */);
 511                                 }
 512                         }
 513                 }
 514         }
 515
 516         free(children, M_TEMP);
 517
 518         isa_running = 1;
 519 }
 520
 521 /*
 522  * Add a new child with default ivars.
 523  */
 524 static device_t
 525 isa_add_child(device_t dev, int order, const char *name, int unit)
 526 {
 527         device_t child;
 528         struct  isa_device *idev;
 529
 530         idev = malloc(sizeof(struct isa_device), M_ISADEV, M_WAITOK | M_ZERO);
 531
 532         resource_list_init(&idev->id_resources);
 533         TAILQ_INIT(&idev->id_configs);
 534
 535         child = device_add_child_ordered(dev, order, name, unit);
 536         device_set_ivars(child, idev);
 537
 538         return child;
 539 }
 540
 541 static int
 542 isa_print_resources(struct resource_list *rl, const char *name, int type,
 543                     int count, const char *format)
 544 {
 545         struct resource_list_entry *rle;
 546         int printed;
 547         int i, retval = 0;;
 548
 549         printed = 0;
 550         for (i = 0; i < count; i++) {
 551                 rle = resource_list_find(rl, type, i);
 552                 if (rle) {
 553                         if (printed == 0)
 554                                 retval += printf(" %s ", name);
 555                         else if (printed > 0)
 556                                 retval += printf(",");
 557                         printed++;
 558                         retval += printf(format, rle->start);
 559                         if (rle->count > 1) {
 560                                 retval += printf("-");
 561                                 retval += printf(format,
 562                                                  rle->start + rle->count - 1);
 563                         }
 564                 } else if (i > 3) {
 565                         /* check the first few regardless */
 566                         break;
 567                 }
 568         }
 569         return retval;
 570 }
 571
 572 static int
 573 isa_print_all_resources(device_t dev)
 574 {
 575         struct  isa_device *idev = DEVTOISA(dev);
 576         struct resource_list *rl = &idev->id_resources;
 577         int retval = 0;
 578
 579         if (SLIST_FIRST(rl) || device_get_flags(dev))
 580                 retval += printf(" at");
 581
 582         retval += isa_print_resources(rl, "port", SYS_RES_IOPORT,
 583                                       ISA_NPORT, "%#lx");
 584         retval += isa_print_resources(rl, "iomem", SYS_RES_MEMORY,
 585                                       ISA_NMEM, "%#lx");
 586         retval += isa_print_resources(rl, "irq", SYS_RES_IRQ,
 587                                       ISA_NIRQ, "%ld");
 588         retval += isa_print_resources(rl, "drq", SYS_RES_DRQ,
 589                                       ISA_NDRQ, "%ld");
 590         if (device_get_flags(dev))
 591                 retval += printf(" flags %#x", device_get_flags(dev));
 592
 593         return retval;
 594 }
 595
 596 static int
 597 isa_print_child(device_t bus, device_t dev)
 598 {
 599         int retval = 0;
 600
 601         retval += bus_print_child_header(bus, dev);
 602         retval += isa_print_all_resources(dev);
 603         retval += bus_print_child_footer(bus, dev);
 604
 605         return (retval);
 606 }
 607
 608 static void
 609 isa_probe_nomatch(device_t dev, device_t child)
 610 {
 611         if (bootverbose) {
 612                 bus_print_child_header(dev, child);
 613                 printf(" failed to probe");
 614                 isa_print_all_resources(child);
 615                 bus_print_child_footer(dev, child);
 616         }
 617
 618         return;
 619 }
 620
 621 static int
 622 isa_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
 623 {
 624         struct isa_device* idev = DEVTOISA(dev);
 625         struct resource_list *rl = &idev->id_resources;
 626         struct resource_list_entry *rle;
 627
 628         switch (index) {
 629         case ISA_IVAR_PORT_0:
 630                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
 631                 if (rle)
 632                         *result = rle->start;
 633                 else
 634                         *result = -1;
 635                 break;
 636
 637         case ISA_IVAR_PORT_1:
 638                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
 639                 if (rle)
 640                         *result = rle->start;
 641                 else
 642                         *result = -1;
 643                 break;
 644
 645         case ISA_IVAR_PORTSIZE_0:
 646                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
 647                 if (rle)
 648                         *result = rle->count;
 649                 else
 650                         *result = 0;
 651                 break;
 652
 653         case ISA_IVAR_PORTSIZE_1:
 654                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
 655                 if (rle)
 656                         *result = rle->count;
 657                 else
 658                         *result = 0;
 659                 break;
 660
 661         case ISA_IVAR_MADDR_0:
 662                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
 663                 if (rle)
 664                         *result = rle->start;
 665                 else
 666                         *result = -1;
 667                 break;
 668
 669         case ISA_IVAR_MADDR_1:
 670                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
 671                 if (rle)
 672                         *result = rle->start;
 673                 else
 674                         *result = -1;
 675                 break;
 676
 677         case ISA_IVAR_MSIZE_0:
 678                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
 679                 if (rle)
 680                         *result = rle->count;
 681                 else
 682                         *result = 0;
 683                 break;
 684
 685         case ISA_IVAR_MSIZE_1:
 686                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
 687                 if (rle)
 688                         *result = rle->count;
 689                 else
 690                         *result = 0;
 691                 break;
 692
 693         case ISA_IVAR_IRQ_0:
 694                 rle = resource_list_find(rl, SYS_RES_IRQ, 0);
 695                 if (rle)
 696                         *result = rle->start;
 697                 else
 698                         *result = -1;
 699                 break;
 700
 701         case ISA_IVAR_IRQ_1:
 702                 rle = resource_list_find(rl, SYS_RES_IRQ, 1);
 703                 if (rle)
 704                         *result = rle->start;
 705                 else
 706                         *result = -1;
 707                 break;
 708
 709         case ISA_IVAR_DRQ_0:
 710                 rle = resource_list_find(rl, SYS_RES_DRQ, 0);
 711                 if (rle)
 712                         *result = rle->start;
 713                 else
 714                         *result = -1;
 715                 break;
 716
 717         case ISA_IVAR_DRQ_1:
 718                 rle = resource_list_find(rl, SYS_RES_DRQ, 1);
 719                 if (rle)
 720                         *result = rle->start;
 721                 else
 722                         *result = -1;
 723                 break;
 724
 725         case ISA_IVAR_VENDORID:
 726                 *result = idev->id_vendorid;
 727                 break;
 728
 729         case ISA_IVAR_SERIAL:
 730                 *result = idev->id_serial;
 731                 break;
 732
 733         case ISA_IVAR_LOGICALID:
 734                 *result = idev->id_logicalid;
 735                 break;
 736
 737         case ISA_IVAR_COMPATID:
 738                 *result = idev->id_compatid;
 739                 break;
 740
 741         default:
 742                 return ENOENT;
 743         }
 744
 745         return 0;
 746 }
 747
 748 static int
 749 isa_write_ivar(device_t bus, device_t dev,
 750                int index, uintptr_t value)
 751 {
 752         struct isa_device* idev = DEVTOISA(dev);
 753
 754         switch (index) {
 755         case ISA_IVAR_PORT_0:
 756         case ISA_IVAR_PORT_1:
 757         case ISA_IVAR_PORTSIZE_0:
 758         case ISA_IVAR_PORTSIZE_1:
 759         case ISA_IVAR_MADDR_0:
 760         case ISA_IVAR_MADDR_1:
 761         case ISA_IVAR_MSIZE_0:
 762         case ISA_IVAR_MSIZE_1:
 763         case ISA_IVAR_IRQ_0:
 764         case ISA_IVAR_IRQ_1:
 765         case ISA_IVAR_DRQ_0:
 766         case ISA_IVAR_DRQ_1:
 767                 return EINVAL;
 768
 769         case ISA_IVAR_VENDORID:
 770                 idev->id_vendorid = value;
 771                 break;
 772
 773         case ISA_IVAR_SERIAL:
 774                 idev->id_serial = value;
 775                 break;
 776
 777         case ISA_IVAR_LOGICALID:
 778                 idev->id_logicalid = value;
 779                 break;
 780
 781         case ISA_IVAR_COMPATID:
 782                 idev->id_compatid = value;
 783                 break;
 784
 785         default:
 786                 return (ENOENT);
 787         }
 788
 789         return (0);
 790 }
 791
 792 /*
 793  * Free any resources which the driver missed or which we were holding for
 794  * it (see isa_probe_children).
 795  */
 796 static void
 797 isa_child_detached(device_t dev, device_t child)
 798 {
 799         struct isa_device* idev = DEVTOISA(child);
 800         struct resource_list *rl = &idev->id_resources;
 801         struct resource_list_entry *rle;
 802
 803         if (TAILQ_FIRST(&idev->id_configs)) {
 804                 /*
 805                  * Claim any unallocated resources to keep other
 806                  * devices from using them.
 807                  */
 808                 SLIST_FOREACH(rle, rl, link) {
 809                         if (!rle->res) {
 810                                 int rid = rle->rid;
 811                                 resource_list_alloc(rl, dev, child,
 812                                                     rle->type,
 813                                                     &rid, 0, ~0, 1, 0);
 814                         }
 815                 }
 816         }
 817 }
 818
 819 static void
 820 isa_driver_added(device_t dev, driver_t *driver)
 821 {
 822         device_t *children;
 823         int nchildren, i;
 824
 825         /*
 826          * Don't do anything if drivers are dynamically
 827          * added during autoconfiguration (cf. ymf724).
 828          * since that would end up calling identify
 829          * twice.
 830          */
 831         if (!isa_running)
 832                 return;
 833
 834         DEVICE_IDENTIFY(driver, dev);
 835         if (device_get_children(dev, &children, &nchildren))
 836                 return;
 837
 838         for (i = 0; i < nchildren; i++) {
 839                 device_t child = children[i];
 840                 struct isa_device *idev = DEVTOISA(child);
 841                 struct resource_list *rl = &idev->id_resources;
 842                 struct resource_list_entry *rle;
 843
 844                 if (device_get_state(child) != DS_NOTPRESENT)
 845                         continue;
 846                 if (!device_is_enabled(child))
 847                         continue;
 848
 849                 /*
 850                  * Free resources which we were holding on behalf of
 851                  * the device.
 852                  */
 853                 SLIST_FOREACH(rle, &idev->id_resources, link) {
 854                         if (rle->res)
 855                                 resource_list_release(rl, dev, child,
 856                                                       rle->type,
 857                                                       rle->rid,
 858                                                       rle->res);
 859                 }
 860
 861                 if (TAILQ_FIRST(&idev->id_configs))
 862                         if (!isa_assign_resources(child))
 863                                 continue;
 864
 865                 device_probe_and_attach(child);
 866
 867                 if (TAILQ_FIRST(&idev->id_configs)) {
 868                         /*
 869                          * Claim any unallocated resources to keep other
 870                          * devices from using them.
 871                          */
 872                         SLIST_FOREACH(rle, rl, link) {
 873                                 if (!rle->res) {
 874                                         int rid = rle->rid;
 875                                         resource_list_alloc(rl, dev, child,
 876                                                             rle->type,
 877                                                             &rid,
 878                                                             0, ~0, 1,
 879                                                             0 /* !RF_ACTIVE */);
 880                                 }
 881                         }
 882                 }
 883         }
 884
 885         free(children, M_TEMP);
 886 }
 887
 888 static int
 889 isa_set_resource(device_t dev, device_t child, int type, int rid,
 890                  u_long start, u_long count)
 891 {
 892         struct isa_device* idev = DEVTOISA(child);
 893         struct resource_list *rl = &idev->id_resources;
 894
 895         if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY
 896             && type != SYS_RES_IRQ && type != SYS_RES_DRQ)
 897                 return EINVAL;
 898         if (rid < 0)
 899                 return EINVAL;
 900         if (type == SYS_RES_IOPORT && rid >= ISA_NPORT)
 901                 return EINVAL;
 902         if (type == SYS_RES_MEMORY && rid >= ISA_NMEM)
 903                 return EINVAL;
 904         if (type == SYS_RES_IRQ && rid >= ISA_NIRQ)
 905                 return EINVAL;
 906         if (type == SYS_RES_DRQ && rid >= ISA_NDRQ)
 907                 return EINVAL;
 908
 909         resource_list_add(rl, type, rid, start, start + count - 1, count);
 910
 911         return 0;
 912 }
 913
 914 static int
 915 isa_get_resource(device_t dev, device_t child, int type, int rid,
 916                  u_long *startp, u_long *countp)
 917 {
 918         struct isa_device* idev = DEVTOISA(child);
 919         struct resource_list *rl = &idev->id_resources;
 920         struct resource_list_entry *rle;
 921
 922         rle = resource_list_find(rl, type, rid);
 923         if (!rle)
 924                 return ENOENT;
 925
 926         if (startp)
 927                 *startp = rle->start;
 928         if (countp)
 929                 *countp = rle->count;
 930
 931         return 0;
 932 }
 933
 934 static void
 935 isa_delete_resource(device_t dev, device_t child, int type, int rid)
 936 {
 937         struct isa_device* idev = DEVTOISA(child);
 938         struct resource_list *rl = &idev->id_resources;
 939         resource_list_delete(rl, type, rid);
 940 }
 941
 942 static int
 943 isa_add_config(device_t dev, device_t child,
 944                int priority, struct isa_config *config)
 945 {
 946         struct isa_device* idev = DEVTOISA(child);
 947         struct isa_config_entry *newice, *ice;
 948
 949         newice = malloc(sizeof *ice, M_DEVBUF, M_WAITOK);
 950         newice->ice_priority = priority;
 951         newice->ice_config = *config;
 952
 953         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
 954                 if (ice->ice_priority > priority)
 955                         break;
 956         }
 957         if (ice)
 958                 TAILQ_INSERT_BEFORE(ice, newice, ice_link);
 959         else
 960                 TAILQ_INSERT_TAIL(&idev->id_configs, newice, ice_link);
 961
 962         return 0;
 963 }
 964
 965 static void
 966 isa_set_config_callback(device_t dev, device_t child,
 967                         isa_config_cb *fn, void *arg)
 968 {
 969         struct isa_device* idev = DEVTOISA(child);
 970
 971         idev->id_config_cb = fn;
 972         idev->id_config_arg = arg;
 973 }
 974
 975 static int
 976 isa_pnp_probe(device_t dev, device_t child, struct isa_pnp_id *ids)
 977 {
 978         struct isa_device* idev = DEVTOISA(child);
 979
 980         if (!idev->id_vendorid)
 981                 return ENOENT;
 982
 983         while (ids->ip_id) {
 984                 /*
 985                  * Really ought to support >1 compat id per device.
 986                  */
 987                 if (idev->id_logicalid == ids->ip_id
 988                     || idev->id_compatid == ids->ip_id) {
 989                         if (ids->ip_desc)
 990                                 device_set_desc(child, ids->ip_desc);
 991                         return 0;
 992                 }
 993                 ids++;
 994         }
 995
 996         return ENXIO;
 997 }
 998
 999 static device_method_t isa_methods[] = {
1000         /* Device interface */
1001         DEVMETHOD(device_probe,         isa_probe),
1002         DEVMETHOD(device_attach,        isa_attach),
1003         DEVMETHOD(device_detach,        bus_generic_detach),
1004         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1005         DEVMETHOD(device_suspend,       bus_generic_suspend),
1006         DEVMETHOD(device_resume,        bus_generic_resume),
1007
1008         /* Bus interface */
1009         DEVMETHOD(bus_add_child,        isa_add_child),
1010         DEVMETHOD(bus_print_child,      isa_print_child),
1011         DEVMETHOD(bus_probe_nomatch,    isa_probe_nomatch),
1012         DEVMETHOD(bus_read_ivar,        isa_read_ivar),
1013         DEVMETHOD(bus_write_ivar,       isa_write_ivar),
1014         DEVMETHOD(bus_child_detached,   isa_child_detached),
1015         DEVMETHOD(bus_driver_added,     isa_driver_added),
1016         DEVMETHOD(bus_alloc_resource,   isa_alloc_resource),
1017         DEVMETHOD(bus_release_resource, isa_release_resource),
1018         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
1019         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
1020         DEVMETHOD(bus_setup_intr,       isa_setup_intr),
1021         DEVMETHOD(bus_teardown_intr,    isa_teardown_intr),
1022         DEVMETHOD(bus_set_resource,     isa_set_resource),
1023         DEVMETHOD(bus_get_resource,     isa_get_resource),
1024         DEVMETHOD(bus_delete_resource,  isa_delete_resource),
1025
1026         /* ISA interface */
1027         DEVMETHOD(isa_add_config,       isa_add_config),
1028         DEVMETHOD(isa_set_config_callback, isa_set_config_callback),
1029         DEVMETHOD(isa_pnp_probe,        isa_pnp_probe),
1030
1031         { 0, 0 }
1032 };
1033
1034 static driver_t isa_driver = {
1035         "isa",
1036         isa_methods,
1037         1,                      /* no softc */
1038 };
1039
1040 /*
1041  * ISA can be attached to a PCI-ISA bridge or directly to the nexus.
1042  */
1043 DRIVER_MODULE(isa, isab, isa_driver, isa_devclass, 0, 0);
1044 #ifdef __i386__
1045 DRIVER_MODULE(isa, nexus, isa_driver, isa_devclass, 0, 0);
1046 #endif
1047