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  */
  28 /*
  29  * Modifications for Intel architecture by Garrett A. Wollman.
  30  * Copyright 1998 Massachusetts Institute of Technology
  31  *
  32  * Permission to use, copy, modify, and distribute this software and
  33  * its documentation for any purpose and without fee is hereby
  34  * granted, provided that both the above copyright notice and this
  35  * permission notice appear in all copies, that both the above
  36  * copyright notice and this permission notice appear in all
  37  * supporting documentation, and that the name of M.I.T. not be used
  38  * in advertising or publicity pertaining to distribution of the
  39  * software without specific, written prior permission.  M.I.T. makes
  40  * no representations about the suitability of this software for any
  41  * purpose.  It is provided "as is" without express or implied
  42  * warranty.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
  45  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
  46  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  47  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
  48  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  49  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  50  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  51  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  52  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  53  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  54  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 /*
  59  * Parts of the ISA bus implementation common to all architectures.
  60  */
  61
  62 #include <sys/param.h>
  63 #include <sys/systm.h>
  64 #include <sys/kernel.h>
  65 #include <sys/bus.h>
  66 #include <sys/malloc.h>
  67 #include <sys/module.h>
  68 #include <sys/rman.h>
  69
  70 #include "isavar.h"
  71 #include "isa_common.h"
  72
  73 static int      isa_print_child         (device_t, device_t);
  74
  75 MALLOC_DEFINE(M_ISADEV, "isadev", "ISA device");
  76
  77 static devclass_t isa_devclass;
  78 static int isa_running;
  79
  80 /*
  81  * At 'probe' time, we add all the devices which we know about to the
  82  * bus.  The generic attach routine will probe and attach them if they
  83  * are alive.
  84  */
  85 static int
  86 isa_probe(device_t dev)
  87 {
  88         device_set_desc(dev, "ISA bus");
  89         isa_init();             /* Allow machdep code to initialise */
  90         return 0;
  91 }
  92
  93 extern device_t isa_bus_device;
  94
  95 static int
  96 isa_attach(device_t dev)
  97 {
  98         /*
  99          * Arrange for isa_probe_children(dev) to be called later. XXX
 100          */
 101         isa_bus_device = dev;
 102         return 0;
 103 }
 104
 105 /*
 106  * Find a working set of memory regions for a child using the ranges
 107  * in *config  and return the regions in *result. Returns non-zero if
 108  * a set of ranges was found.
 109  */
 110 static int
 111 isa_find_memory(device_t child,
 112                 struct isa_config *config,
 113                 struct isa_config *result)
 114 {
 115         int success, i;
 116         struct resource *res[ISA_NMEM];
 117
 118         /*
 119          * First clear out any existing resource definitions.
 120          */
 121         for (i = 0; i < ISA_NMEM; i++) {
 122                 bus_delete_resource(child, SYS_RES_MEMORY, i);
 123                 res[i] = NULL;
 124         }
 125
 126         success = 1;
 127         result->ic_nmem = config->ic_nmem;
 128         for (i = 0; i < config->ic_nmem; i++) {
 129                 u_int32_t start, end, size, align;
 130                 for (start = config->ic_mem[i].ir_start,
 131                              end = config->ic_mem[i].ir_end,
 132                              size = config->ic_mem[i].ir_size,
 133                              align = config->ic_mem[i].ir_align;
 134                      start + size - 1 <= end;
 135                      start += MAX(align, 1)) {
 136                         bus_set_resource(child, SYS_RES_MEMORY, i,
 137                                          start, size);
 138                         res[i] = bus_alloc_resource(child,
 139                                                     SYS_RES_MEMORY, &i,
 140                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
 141                         if (res[i]) {
 142                                 result->ic_mem[i].ir_start = start;
 143                                 result->ic_mem[i].ir_end = start + size - 1;
 144                                 result->ic_mem[i].ir_size = size;
 145                                 result->ic_mem[i].ir_align = align;
 146                                 break;
 147                         }
 148                 }
 149
 150                 /*
 151                  * If we didn't find a place for memory range i, then
 152                  * give up now.
 153                  */
 154                 if (!res[i]) {
 155                         success = 0;
 156                         break;
 157                 }
 158         }
 159
 160         for (i = 0; i < ISA_NMEM; i++) {
 161                 if (res[i])
 162                         bus_release_resource(child, SYS_RES_MEMORY,
 163                                              i, res[i]);
 164         }
 165
 166         return success;
 167 }
 168
 169 /*
 170  * Find a working set of port regions for a child using the ranges
 171  * in *config  and return the regions in *result. Returns non-zero if
 172  * a set of ranges was found.
 173  */
 174 static int
 175 isa_find_port(device_t child,
 176               struct isa_config *config,
 177               struct isa_config *result)
 178 {
 179         int success, i;
 180         struct resource *res[ISA_NPORT];
 181
 182         /*
 183          * First clear out any existing resource definitions.
 184          */
 185         for (i = 0; i < ISA_NPORT; i++) {
 186                 bus_delete_resource(child, SYS_RES_IOPORT, i);
 187                 res[i] = NULL;
 188         }
 189
 190         success = 1;
 191         result->ic_nport = config->ic_nport;
 192         for (i = 0; i < config->ic_nport; i++) {
 193                 u_int32_t start, end, size, align;
 194                 for (start = config->ic_port[i].ir_start,
 195                              end = config->ic_port[i].ir_end,
 196                              size = config->ic_port[i].ir_size,
 197                              align = config->ic_port[i].ir_align;
 198                      start + size - 1 <= end;
 199                      start += align) {
 200                         bus_set_resource(child, SYS_RES_IOPORT, i,
 201                                          start, size);
 202                         res[i] = bus_alloc_resource(child,
 203                                                     SYS_RES_IOPORT, &i,
 204                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
 205                         if (res[i]) {
 206                                 result->ic_port[i].ir_start = start;
 207                                 result->ic_port[i].ir_end = start + size - 1;
 208                                 result->ic_port[i].ir_size = size;
 209                                 result->ic_port[i].ir_align = align;
 210                                 break;
 211                         }
 212                 }
 213
 214                 /*
 215                  * If we didn't find a place for port range i, then
 216                  * give up now.
 217                  */
 218                 if (!res[i]) {
 219                         success = 0;
 220                         break;
 221                 }
 222         }
 223
 224         for (i = 0; i < ISA_NPORT; i++) {
 225                 if (res[i])
 226                         bus_release_resource(child, SYS_RES_IOPORT,
 227                                              i, res[i]);
 228         }
 229
 230         return success;
 231 }
 232
 233 /*
 234  * Return the index of the first bit in the mask (or -1 if mask is empty.
 235  */
 236 static int
 237 find_first_bit(u_int32_t mask)
 238 {
 239         return ffs(mask) - 1;
 240 }
 241
 242 /*
 243  * Return the index of the next bit in the mask, or -1 if there are no more.
 244  */
 245 static int
 246 find_next_bit(u_int32_t mask, int bit)
 247 {
 248         bit++;
 249         while (bit < 32 && !(mask & (1 << bit)))
 250                 bit++;
 251         if (bit != 32)
 252                 return bit;
 253         return -1;
 254 }
 255
 256 /*
 257  * Find a working set of irqs for a child using the masks in *config
 258  * and return the regions in *result. Returns non-zero if a set of
 259  * irqs was found.
 260  */
 261 static int
 262 isa_find_irq(device_t child,
 263              struct isa_config *config,
 264              struct isa_config *result)
 265 {
 266         int success, i;
 267         struct resource *res[ISA_NIRQ];
 268
 269         /*
 270          * First clear out any existing resource definitions.
 271          */
 272         for (i = 0; i < ISA_NIRQ; i++) {
 273                 bus_delete_resource(child, SYS_RES_IRQ, i);
 274                 res[i] = NULL;
 275         }
 276
 277         success = 1;
 278         result->ic_nirq = config->ic_nirq;
 279         for (i = 0; i < config->ic_nirq; i++) {
 280                 u_int32_t mask = config->ic_irqmask[i];
 281                 int irq;
 282                 for (irq = find_first_bit(mask);
 283                      irq != -1;
 284                      irq = find_next_bit(mask, irq)) {
 285                         bus_set_resource(child, SYS_RES_IRQ, i,
 286                                          irq, 1);
 287                         res[i] = bus_alloc_resource(child,
 288                                                     SYS_RES_IRQ, &i,
 289                                                     0, ~0, 1, 0 /* !RF_ACTIVE */ );
 290                         if (res[i]) {
 291                                 result->ic_irqmask[i] = (1 << irq);
 292                                 break;
 293                         }
 294                 }
 295
 296                 /*
 297                  * If we didn't find a place for irq range i, then
 298                  * give up now.
 299                  */
 300                 if (!res[i]) {
 301                         success = 0;
 302                         break;
 303                 }
 304         }
 305
 306         for (i = 0; i < ISA_NIRQ; i++) {
 307                 if (res[i])
 308                         bus_release_resource(child, SYS_RES_IRQ,
 309                                              i, res[i]);
 310         }
 311
 312         return success;
 313 }
 314
 315 /*
 316  * Find a working set of drqs for a child using the masks in *config
 317  * and return the regions in *result. Returns non-zero if a set of
 318  * drqs was found.
 319  */
 320 static int
 321 isa_find_drq(device_t child,
 322              struct isa_config *config,
 323              struct isa_config *result)
 324 {
 325         int success, i;
 326         struct resource *res[ISA_NDRQ];
 327
 328         /*
 329          * First clear out any existing resource definitions.
 330          */
 331         for (i = 0; i < ISA_NDRQ; i++) {
 332                 bus_delete_resource(child, SYS_RES_DRQ, i);
 333                 res[i] = NULL;
 334         }
 335
 336         success = 1;
 337         result->ic_ndrq = config->ic_ndrq;
 338         for (i = 0; i < config->ic_ndrq; i++) {
 339                 u_int32_t mask = config->ic_drqmask[i];
 340                 int drq;
 341                 for (drq = find_first_bit(mask);
 342                      drq != -1;
 343                      drq = find_next_bit(mask, drq)) {
 344                         bus_set_resource(child, SYS_RES_DRQ, i,
 345                                          drq, 1);
 346                         res[i] = bus_alloc_resource(child,
 347                                                     SYS_RES_DRQ, &i,
 348                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
 349                         if (res[i]) {
 350                                 result->ic_drqmask[i] = (1 << drq);
 351                                 break;
 352                         }
 353                 }
 354
 355                 /*
 356                  * If we didn't find a place for drq range i, then
 357                  * give up now.
 358                  */
 359                 if (!res[i]) {
 360                         success = 0;
 361                         break;
 362                 }
 363         }
 364
 365         for (i = 0; i < ISA_NDRQ; i++) {
 366                 if (res[i])
 367                         bus_release_resource(child, SYS_RES_DRQ,
 368                                              i, res[i]);
 369         }
 370
 371         return success;
 372 }
 373
 374 /*
 375  * Attempt to find a working set of resources for a device. Return
 376  * non-zero if a working configuration is found.
 377  */
 378 static int
 379 isa_assign_resources(device_t child)
 380 {
 381         struct isa_device *idev = DEVTOISA(child);
 382         struct isa_config_entry *ice;
 383         struct isa_config config;
 384         char *reason = "Empty ISA id_configs";
 385
 386         bzero(&config, sizeof config);
 387         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
 388                 reason = "memory";
 389                 if (!isa_find_memory(child, &ice->ice_config, &config))
 390                         continue;
 391                 reason = "port";
 392                 if (!isa_find_port(child, &ice->ice_config, &config))
 393                         continue;
 394                 reason = "irq";
 395                 if (!isa_find_irq(child, &ice->ice_config, &config))
 396                         continue;
 397                 reason = "drq";
 398                 if (!isa_find_drq(child, &ice->ice_config, &config))
 399                         continue;
 400
 401                 /*
 402                  * A working configuration was found enable the device
 403                  * with this configuration.
 404                  */
 405                 reason = "no callback";
 406                 if (idev->id_config_cb) {
 407                         idev->id_config_cb(idev->id_config_arg,
 408                                            &config, 1);
 409                         return 1;
 410                 }
 411         }
 412
 413         /*
 414          * Disable the device.
 415          */
 416         bus_print_child_header(device_get_parent(child), child);
 417         kprintf(" can't assign resources (%s)\n", reason);
 418         if (bootverbose)
 419             isa_print_child(device_get_parent(child), child);
 420         bzero(&config, sizeof config);
 421         if (idev->id_config_cb)
 422                 idev->id_config_cb(idev->id_config_arg, &config, 0);
 423         device_disable(child);
 424
 425         return 0;
 426 }
 427
 428 /*
 429  * Called after other devices have initialised to probe for isa devices.
 430  */
 431 void
 432 isa_probe_children(device_t dev)
 433 {
 434         device_t *children;
 435         int nchildren, i;
 436
 437         /*
 438          * Create all the children by calling driver's identify methods.
 439          * Since this routine is called long after the ISA bus had been
 440          * attached, yet never probed, we have to call a hack function that
 441          * temporarily sets the bus back to DS_ALIVE to run the probe.
 442          */
 443         bus_generic_probe_hack(dev);
 444
 445         if (device_get_children(dev, &children, &nchildren))
 446                 return;
 447
 448         /*
 449          * First disable all pnp devices so that they don't get
 450          * matched by legacy probes.
 451          */
 452         if (bootverbose)
 453                 kprintf("isa_probe_children: disabling PnP devices\n");
 454         for (i = 0; i < nchildren; i++) {
 455                 device_t child = children[i];
 456                 struct isa_device *idev = DEVTOISA(child);
 457                 struct isa_config config;
 458
 459                 bzero(&config, sizeof config);
 460                 if (idev->id_config_cb)
 461                         idev->id_config_cb(idev->id_config_arg, &config, 0);
 462         }
 463
 464         /*
 465          * Next probe all non-pnp devices so that they claim their
 466          * resources first.
 467          */
 468         if (bootverbose)
 469                 kprintf("isa_probe_children: probing non-PnP devices\n");
 470         for (i = 0; i < nchildren; i++) {
 471                 device_t child = children[i];
 472                 struct isa_device *idev = DEVTOISA(child);
 473
 474                 if (TAILQ_FIRST(&idev->id_configs))
 475                         continue;
 476
 477                 device_probe_and_attach(child);
 478         }
 479
 480         /*
 481          * Finally assign resource to pnp devices and probe them.
 482          */
 483         if (bootverbose)
 484                 kprintf("isa_probe_children: probing PnP devices\n");
 485         for (i = 0; i < nchildren; i++) {
 486                 device_t child = children[i];
 487                 struct isa_device* idev = DEVTOISA(child);
 488
 489                 if (!TAILQ_FIRST(&idev->id_configs))
 490                         continue;
 491
 492                 if (isa_assign_resources(child)) {
 493                         struct resource_list *rl = &idev->id_resources;
 494                         struct resource_list_entry *rle;
 495
 496                         device_probe_and_attach(child);
 497
 498                         /*
 499                          * Claim any unallocated resources to keep other
 500                          * devices from using them.
 501                          */
 502                         SLIST_FOREACH(rle, rl, link) {
 503                                 if (!rle->res) {
 504                                         int rid = rle->rid;
 505                                         resource_list_alloc(rl, dev, child,
 506                                                             rle->type,
 507                                                             &rid,
 508                                                             0, ~0, 1,
 509                                                             0 /* !RF_ACTIVE */);
 510                                 }
 511                         }
 512                 }
 513         }
 514
 515         kfree(children, M_TEMP);
 516
 517         isa_running = 1;
 518 }
 519
 520 /*
 521  * Add a new child with default ivars.
 522  */
 523 static device_t
 524 isa_add_child(device_t bus, device_t parent, int order, const char *name, int unit)
 525 {
 526         device_t child;
 527         struct  isa_device *idev;
 528
 529         idev = kmalloc(sizeof(struct isa_device), M_ISADEV, M_WAITOK | M_ZERO);
 530
 531         resource_list_init(&idev->id_resources);
 532         TAILQ_INIT(&idev->id_configs);
 533
 534         child = device_add_child_ordered(parent, order, name, unit);
 535         device_set_ivars(child, idev);
 536
 537         return child;
 538 }
 539
 540 static int
 541 isa_print_resources(struct resource_list *rl, const char *name, int type,
 542                     int count, const char *format)
 543 {
 544         struct resource_list_entry *rle;
 545         int printed;
 546         int i, retval = 0;
 547
 548         printed = 0;
 549         for (i = 0; i < count; i++) {
 550                 rle = resource_list_find(rl, type, i);
 551                 if (rle) {
 552                         if (printed == 0)
 553                                 retval += kprintf(" %s ", name);
 554                         else if (printed > 0)
 555                                 retval += kprintf(",");
 556                         printed++;
 557                         retval += kprintf(format, rle->start);
 558                         if (rle->count > 1) {
 559                                 retval += kprintf("-");
 560                                 retval += kprintf(format,
 561                                                  rle->start + rle->count - 1);
 562                         }
 563                 } else if (i > 3) {
 564                         /* check the first few regardless */
 565                         break;
 566                 }
 567         }
 568         return retval;
 569 }
 570
 571 static int
 572 isa_print_all_resources(device_t dev)
 573 {
 574         struct  isa_device *idev = DEVTOISA(dev);
 575         struct resource_list *rl = &idev->id_resources;
 576         int retval = 0;
 577
 578         if (SLIST_FIRST(rl) || device_get_flags(dev))
 579                 retval += kprintf(" at");
 580
 581         retval += isa_print_resources(rl, "port", SYS_RES_IOPORT,
 582                                       ISA_NPORT, "%#lx");
 583         retval += isa_print_resources(rl, "iomem", SYS_RES_MEMORY,
 584                                       ISA_NMEM, "%#lx");
 585         retval += isa_print_resources(rl, "irq", SYS_RES_IRQ,
 586                                       ISA_NIRQ, "%ld");
 587         retval += isa_print_resources(rl, "drq", SYS_RES_DRQ,
 588                                       ISA_NDRQ, "%ld");
 589         if (device_get_flags(dev))
 590                 retval += kprintf(" flags %#x", device_get_flags(dev));
 591
 592         return retval;
 593 }
 594
 595 static int
 596 isa_print_child(device_t bus, device_t dev)
 597 {
 598         int retval = 0;
 599
 600         retval += bus_print_child_header(bus, dev);
 601         retval += isa_print_all_resources(dev);
 602         retval += bus_print_child_footer(bus, dev);
 603
 604         return (retval);
 605 }
 606
 607 static void
 608 isa_probe_nomatch(device_t dev, device_t child)
 609 {
 610         if (bootverbose) {
 611                 bus_print_child_header(dev, child);
 612                 kprintf(" failed to probe");
 613                 isa_print_all_resources(child);
 614                 bus_print_child_footer(dev, child);
 615         }
 616
 617         return;
 618 }
 619
 620 static int
 621 isa_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
 622 {
 623         struct isa_device* idev = DEVTOISA(dev);
 624         struct resource_list *rl = &idev->id_resources;
 625         struct resource_list_entry *rle;
 626
 627         switch (index) {
 628         case ISA_IVAR_PORT_0:
 629                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
 630                 if (rle)
 631                         *result = rle->start;
 632                 else
 633                         *result = -1;
 634                 break;
 635
 636         case ISA_IVAR_PORT_1:
 637                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
 638                 if (rle)
 639                         *result = rle->start;
 640                 else
 641                         *result = -1;
 642                 break;
 643
 644         case ISA_IVAR_PORTSIZE_0:
 645                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
 646                 if (rle)
 647                         *result = rle->count;
 648                 else
 649                         *result = 0;
 650                 break;
 651
 652         case ISA_IVAR_PORTSIZE_1:
 653                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
 654                 if (rle)
 655                         *result = rle->count;
 656                 else
 657                         *result = 0;
 658                 break;
 659
 660         case ISA_IVAR_MADDR_0:
 661                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
 662                 if (rle)
 663                         *result = rle->start;
 664                 else
 665                         *result = -1;
 666                 break;
 667
 668         case ISA_IVAR_MADDR_1:
 669                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
 670                 if (rle)
 671                         *result = rle->start;
 672                 else
 673                         *result = -1;
 674                 break;
 675
 676         case ISA_IVAR_MSIZE_0:
 677                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
 678                 if (rle)
 679                         *result = rle->count;
 680                 else
 681                         *result = 0;
 682                 break;
 683
 684         case ISA_IVAR_MSIZE_1:
 685                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
 686                 if (rle)
 687                         *result = rle->count;
 688                 else
 689                         *result = 0;
 690                 break;
 691
 692         case ISA_IVAR_IRQ_0:
 693                 rle = resource_list_find(rl, SYS_RES_IRQ, 0);
 694                 if (rle)
 695                         *result = rle->start;
 696                 else
 697                         *result = -1;
 698                 break;
 699
 700         case ISA_IVAR_IRQ_1:
 701                 rle = resource_list_find(rl, SYS_RES_IRQ, 1);
 702                 if (rle)
 703                         *result = rle->start;
 704                 else
 705                         *result = -1;
 706                 break;
 707
 708         case ISA_IVAR_DRQ_0:
 709                 rle = resource_list_find(rl, SYS_RES_DRQ, 0);
 710                 if (rle)
 711                         *result = rle->start;
 712                 else
 713                         *result = -1;
 714                 break;
 715
 716         case ISA_IVAR_DRQ_1:
 717                 rle = resource_list_find(rl, SYS_RES_DRQ, 1);
 718                 if (rle)
 719                         *result = rle->start;
 720                 else
 721                         *result = -1;
 722                 break;
 723
 724         case ISA_IVAR_VENDORID:
 725                 *result = idev->id_vendorid;
 726                 break;
 727
 728         case ISA_IVAR_SERIAL:
 729                 *result = idev->id_serial;
 730                 break;
 731
 732         case ISA_IVAR_LOGICALID:
 733                 *result = idev->id_logicalid;
 734                 break;
 735
 736         case ISA_IVAR_COMPATID:
 737                 *result = idev->id_compatid;
 738                 break;
 739
 740         default:
 741                 return ENOENT;
 742         }
 743
 744         return 0;
 745 }
 746
 747 static int
 748 isa_write_ivar(device_t bus, device_t dev,
 749                int index, uintptr_t value)
 750 {
 751         struct isa_device* idev = DEVTOISA(dev);
 752
 753         switch (index) {
 754         case ISA_IVAR_PORT_0:
 755         case ISA_IVAR_PORT_1:
 756         case ISA_IVAR_PORTSIZE_0:
 757         case ISA_IVAR_PORTSIZE_1:
 758         case ISA_IVAR_MADDR_0:
 759         case ISA_IVAR_MADDR_1:
 760         case ISA_IVAR_MSIZE_0:
 761         case ISA_IVAR_MSIZE_1:
 762         case ISA_IVAR_IRQ_0:
 763         case ISA_IVAR_IRQ_1:
 764         case ISA_IVAR_DRQ_0:
 765         case ISA_IVAR_DRQ_1:
 766                 return EINVAL;
 767
 768         case ISA_IVAR_VENDORID:
 769                 idev->id_vendorid = value;
 770                 break;
 771
 772         case ISA_IVAR_SERIAL:
 773                 idev->id_serial = value;
 774                 break;
 775
 776         case ISA_IVAR_LOGICALID:
 777                 idev->id_logicalid = value;
 778                 break;
 779
 780         case ISA_IVAR_COMPATID:
 781                 idev->id_compatid = value;
 782                 break;
 783
 784         default:
 785                 return (ENOENT);
 786         }
 787
 788         return (0);
 789 }
 790
 791 /*
 792  * Free any resources which the driver missed or which we were holding for
 793  * it (see isa_probe_children).
 794  */
 795 static void
 796 isa_child_detached(device_t dev, device_t child)
 797 {
 798         struct isa_device* idev = DEVTOISA(child);
 799         struct resource_list *rl = &idev->id_resources;
 800         struct resource_list_entry *rle;
 801
 802         if (TAILQ_FIRST(&idev->id_configs)) {
 803                 /*
 804                  * Claim any unallocated resources to keep other
 805                  * devices from using them.
 806                  */
 807                 SLIST_FOREACH(rle, rl, link) {
 808                         if (!rle->res) {
 809                                 int rid = rle->rid;
 810                                 resource_list_alloc(rl, dev, child,
 811                                                     rle->type,
 812                                                     &rid, 0, ~0, 1, 0);
 813                         }
 814                 }
 815         }
 816 }
 817
 818 static void
 819 isa_driver_added(device_t dev, driver_t *driver)
 820 {
 821         device_t *children;
 822         int nchildren, i;
 823
 824         /*
 825          * Don't do anything if drivers are dynamically
 826          * added during autoconfiguration (cf. ymf724).
 827          * since that would end up calling identify
 828          * twice.
 829          */
 830         if (!isa_running)
 831                 return;
 832
 833         DEVICE_IDENTIFY(driver, dev);
 834         if (device_get_children(dev, &children, &nchildren))
 835                 return;
 836
 837         for (i = 0; i < nchildren; i++) {
 838                 device_t child = children[i];
 839                 struct isa_device *idev = DEVTOISA(child);
 840                 struct resource_list *rl = &idev->id_resources;
 841                 struct resource_list_entry *rle;
 842
 843                 if (device_get_state(child) != DS_NOTPRESENT)
 844                         continue;
 845                 if (!device_is_enabled(child))
 846                         continue;
 847
 848                 /*
 849                  * Free resources which we were holding on behalf of
 850                  * the device.
 851                  */
 852                 SLIST_FOREACH(rle, &idev->id_resources, link) {
 853                         if (rle->res)
 854                                 resource_list_release(rl, dev, child,
 855                                                       rle->type,
 856                                                       rle->rid,
 857                                                       rle->res);
 858                 }
 859
 860                 if (TAILQ_FIRST(&idev->id_configs))
 861                         if (!isa_assign_resources(child))
 862                                 continue;
 863
 864                 device_probe_and_attach(child);
 865
 866                 if (TAILQ_FIRST(&idev->id_configs)) {
 867                         /*
 868                          * Claim any unallocated resources to keep other
 869                          * devices from using them.
 870                          */
 871                         SLIST_FOREACH(rle, rl, link) {
 872                                 if (!rle->res) {
 873                                         int rid = rle->rid;
 874                                         resource_list_alloc(rl, dev, child,
 875                                                             rle->type,
 876                                                             &rid,
 877                                                             0, ~0, 1,
 878                                                             0 /* !RF_ACTIVE */);
 879                                 }
 880                         }
 881                 }
 882         }
 883
 884         kfree(children, M_TEMP);
 885 }
 886
 887 static int
 888 isa_set_resource(device_t dev, device_t child, int type, int rid,
 889                  u_long start, u_long count)
 890 {
 891         struct isa_device* idev = DEVTOISA(child);
 892         struct resource_list *rl = &idev->id_resources;
 893
 894         if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY
 895             && type != SYS_RES_IRQ && type != SYS_RES_DRQ)
 896                 return EINVAL;
 897         if (rid < 0)
 898                 return EINVAL;
 899         if (type == SYS_RES_IOPORT && rid >= ISA_NPORT)
 900                 return EINVAL;
 901         if (type == SYS_RES_MEMORY && rid >= ISA_NMEM)
 902                 return EINVAL;
 903         if (type == SYS_RES_IRQ && rid >= ISA_NIRQ)
 904                 return EINVAL;
 905         if (type == SYS_RES_DRQ && rid >= ISA_NDRQ)
 906                 return EINVAL;
 907
 908         resource_list_add(rl, type, rid, start, start + count - 1, count);
 909
 910         return 0;
 911 }
 912
 913 static int
 914 isa_get_resource(device_t dev, device_t child, int type, int rid,
 915                  u_long *startp, u_long *countp)
 916 {
 917         struct isa_device* idev = DEVTOISA(child);
 918         struct resource_list *rl = &idev->id_resources;
 919         struct resource_list_entry *rle;
 920
 921         rle = resource_list_find(rl, type, rid);
 922         if (!rle)
 923                 return ENOENT;
 924
 925         if (startp)
 926                 *startp = rle->start;
 927         if (countp)
 928                 *countp = rle->count;
 929
 930         return 0;
 931 }
 932
 933 static void
 934 isa_delete_resource(device_t dev, device_t child, int type, int rid)
 935 {
 936         struct isa_device* idev = DEVTOISA(child);
 937         struct resource_list *rl = &idev->id_resources;
 938         resource_list_delete(rl, type, rid);
 939 }
 940
 941 static int
 942 isa_add_config(device_t dev, device_t child,
 943                int priority, struct isa_config *config)
 944 {
 945         struct isa_device* idev = DEVTOISA(child);
 946         struct isa_config_entry *newice, *ice;
 947
 948         newice = kmalloc(sizeof *ice, M_DEVBUF, M_WAITOK);
 949         newice->ice_priority = priority;
 950         newice->ice_config = *config;
 951
 952         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
 953                 if (ice->ice_priority > priority)
 954                         break;
 955         }
 956         if (ice)
 957                 TAILQ_INSERT_BEFORE(ice, newice, ice_link);
 958         else
 959                 TAILQ_INSERT_TAIL(&idev->id_configs, newice, ice_link);
 960
 961         return 0;
 962 }
 963
 964 static void
 965 isa_set_config_callback(device_t dev, device_t child,
 966                         isa_config_cb *fn, void *arg)
 967 {
 968         struct isa_device* idev = DEVTOISA(child);
 969
 970         idev->id_config_cb = fn;
 971         idev->id_config_arg = arg;
 972 }
 973
 974 static int
 975 isa_pnp_probe(device_t dev, device_t child, struct isa_pnp_id *ids)
 976 {
 977         struct isa_device* idev = DEVTOISA(child);
 978
 979         if (!idev->id_vendorid)
 980                 return ENOENT;
 981
 982         while (ids->ip_id) {
 983                 /*
 984                  * Really ought to support >1 compat id per device.
 985                  */
 986                 if (idev->id_logicalid == ids->ip_id
 987                     || idev->id_compatid == ids->ip_id) {
 988                         if (ids->ip_desc)
 989                                 device_set_desc(child, ids->ip_desc);
 990                         return 0;
 991                 }
 992                 ids++;
 993         }
 994
 995         return ENXIO;
 996 }
 997
 998 static device_method_t isa_methods[] = {
 999         /* Device interface */
1000         DEVMETHOD(device_probe,         isa_probe),
1001         DEVMETHOD(device_attach,        isa_attach),
1002         DEVMETHOD(device_detach,        bus_generic_detach),
1003         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1004         DEVMETHOD(device_suspend,       bus_generic_suspend),
1005         DEVMETHOD(device_resume,        bus_generic_resume),
1006
1007         /* Bus interface */
1008         DEVMETHOD(bus_add_child,        isa_add_child),
1009         DEVMETHOD(bus_print_child,      isa_print_child),
1010         DEVMETHOD(bus_probe_nomatch,    isa_probe_nomatch),
1011         DEVMETHOD(bus_read_ivar,        isa_read_ivar),
1012         DEVMETHOD(bus_write_ivar,       isa_write_ivar),
1013         DEVMETHOD(bus_child_detached,   isa_child_detached),
1014         DEVMETHOD(bus_driver_added,     isa_driver_added),
1015         DEVMETHOD(bus_alloc_resource,   isa_alloc_resource),
1016         DEVMETHOD(bus_release_resource, isa_release_resource),
1017         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
1018         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
1019         DEVMETHOD(bus_setup_intr,       isa_setup_intr),
1020         DEVMETHOD(bus_teardown_intr,    isa_teardown_intr),
1021         DEVMETHOD(bus_set_resource,     isa_set_resource),
1022         DEVMETHOD(bus_get_resource,     isa_get_resource),
1023         DEVMETHOD(bus_delete_resource,  isa_delete_resource),
1024
1025         /* ISA interface */
1026         DEVMETHOD(isa_add_config,       isa_add_config),
1027         DEVMETHOD(isa_set_config_callback, isa_set_config_callback),
1028         DEVMETHOD(isa_pnp_probe,        isa_pnp_probe),
1029
1030         { 0, 0 }
1031 };
1032
1033 static driver_t isa_driver = {
1034         "isa",
1035         isa_methods,
1036         1,                      /* no softc */
1037 };
1038
1039 /*
1040  * ISA can be attached to a PCI-ISA bridge or directly to the nexus.
1041  */
1042 DRIVER_MODULE(isa, isab, isa_driver, isa_devclass, NULL, NULL);
1043 #ifdef __i386__
1044 DRIVER_MODULE(isa, nexus, isa_driver, isa_devclass, NULL, NULL);
1045 #endif
1046 MODULE_VERSION(isa, 1);
1047
1048 /*
1049  * Code common to ISA bridges.
1050  */
1051 int
1052 isab_attach(device_t dev)
1053 {
1054         device_t child;
1055
1056         child = device_add_child(dev, "isa", 0);
1057         if (child != NULL)
1058                 return (bus_generic_attach(dev));
1059         return (ENXIO);
1060 }