sys/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  * $FreeBSD$
  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 <machine/bus.h>
  69 #include <sys/rman.h>
  70
  71 #include <machine/resource.h>
  72
  73 #include <isa/isavar.h>
  74 #include <isa/isa_common.h>
  75 #ifdef __alpha__                /* XXX workaround a stupid warning */
  76 #include <alpha/isa/isavar.h>
  77 #endif
  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, 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, 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, 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, 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
 389         bzero(&config, sizeof config);
 390         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
 391                 if (!isa_find_memory(child, &ice->ice_config, &config))
 392                         continue;
 393                 if (!isa_find_port(child, &ice->ice_config, &config))
 394                         continue;
 395                 if (!isa_find_irq(child, &ice->ice_config, &config))
 396                         continue;
 397                 if (!isa_find_drq(child, &ice->ice_config, &config))
 398                         continue;
 399
 400                 /*
 401                  * A working configuration was found enable the device
 402                  * with this configuration.
 403                  */
 404                 if (idev->id_config_cb) {
 405                         idev->id_config_cb(idev->id_config_arg,
 406                                            &config, 1);
 407                         return 1;
 408                 }
 409         }
 410
 411         /*
 412          * Disable the device.
 413          */
 414         if (device_get_desc(child))
 415             device_printf(child, "<%s> can't assign resources\n",
 416                           device_get_desc(child));
 417         else
 418             device_printf(child, "can't assign resources\n");
 419         bzero(&config, sizeof config);
 420         if (idev->id_config_cb)
 421                 idev->id_config_cb(idev->id_config_arg, &config, 0);
 422         device_disable(child);
 423
 424         return 0;
 425 }
 426
 427 /*
 428  * Called after other devices have initialised to probe for isa devices.
 429  */
 430 void
 431 isa_probe_children(device_t dev)
 432 {
 433         device_t *children;
 434         int nchildren, i;
 435
 436         /*
 437          * Create all the children by calling driver's identify methods.
 438          */
 439         bus_generic_probe(dev);
 440
 441         if (device_get_children(dev, &children, &nchildren))
 442                 return;
 443
 444         /*
 445          * First disable all pnp devices so that they don't get
 446          * matched by legacy probes.
 447          */
 448         if (bootverbose)
 449                 printf("isa_probe_children: disabling PnP devices\n");
 450         for (i = 0; i < nchildren; i++) {
 451                 device_t child = children[i];
 452                 struct isa_device *idev = DEVTOISA(child);
 453                 struct isa_config config;
 454
 455                 bzero(&config, sizeof config);
 456                 if (idev->id_config_cb)
 457                         idev->id_config_cb(idev->id_config_arg, &config, 0);
 458         }
 459
 460         /*
 461          * Next probe all non-pnp devices so that they claim their
 462          * resources first.
 463          */
 464         if (bootverbose)
 465                 printf("isa_probe_children: probing non-PnP devices\n");
 466         for (i = 0; i < nchildren; i++) {
 467                 device_t child = children[i];
 468                 struct isa_device *idev = DEVTOISA(child);
 469
 470                 if (TAILQ_FIRST(&idev->id_configs))
 471                         continue;
 472
 473                 device_probe_and_attach(child);
 474         }
 475
 476         /*
 477          * Finally assign resource to pnp devices and probe them.
 478          */
 479         if (bootverbose)
 480                 printf("isa_probe_children: probing PnP devices\n");
 481         for (i = 0; i < nchildren; i++) {
 482                 device_t child = children[i];
 483                 struct isa_device* idev = DEVTOISA(child);
 484
 485                 if (!TAILQ_FIRST(&idev->id_configs))
 486                         continue;
 487
 488                 if (isa_assign_resources(child)) {
 489                         struct resource_list *rl = &idev->id_resources;
 490                         struct resource_list_entry *rle;
 491
 492                         device_probe_and_attach(child);
 493
 494                         /*
 495                          * Claim any unallocated resources to keep other
 496                          * devices from using them.
 497                          */
 498                         SLIST_FOREACH(rle, rl, link) {
 499                                 if (!rle->res) {
 500                                         int rid = rle->rid;
 501                                         resource_list_alloc(rl, dev, child,
 502                                                             rle->type,
 503                                                             &rid,
 504                                                             0, ~0, 1,
 505                                                             0 /* !RF_ACTIVE */);
 506                                 }
 507                         }
 508                 }
 509         }
 510
 511         free(children, M_TEMP);
 512
 513         isa_running = 1;
 514 }
 515
 516 /*
 517  * Add a new child with default ivars.
 518  */
 519 static device_t
 520 isa_add_child(device_t dev, int order, const char *name, int unit)
 521 {
 522         device_t child;
 523         struct  isa_device *idev;
 524
 525         idev = malloc(sizeof(struct isa_device), M_ISADEV, M_NOWAIT);
 526         if (!idev)
 527                 return 0;
 528         bzero(idev, sizeof *idev);
 529
 530         resource_list_init(&idev->id_resources);
 531         TAILQ_INIT(&idev->id_configs);
 532
 533         child = device_add_child_ordered(dev, order, name, unit);
 534         device_set_ivars(child, idev);
 535
 536         return child;
 537 }
 538
 539 static void
 540 isa_print_resources(struct resource_list *rl, const char *name, int type,
 541                     int count, const char *format)
 542 {
 543         struct resource_list_entry *rle;
 544         int printed;
 545         int i;
 546
 547         printed = 0;
 548         for (i = 0; i < count; i++) {
 549                 rle = resource_list_find(rl, type, i);
 550                 if (rle) {
 551                         if (printed == 0)
 552                                 printf(" %s ", name);
 553                         else if (printed > 0)
 554                                 printf(",");
 555                         printed++;
 556                         printf(format, rle->start);
 557                         if (rle->count > 1) {
 558                                 printf("-");
 559                                 printf(format, rle->start + rle->count - 1);
 560                         }
 561                 } else if (i > 3) {
 562                         /* check the first few regardless */
 563                         break;
 564                 }
 565         }
 566 }
 567
 568 static int
 569 isa_print_child(device_t bus, device_t dev)
 570 {
 571         struct  isa_device *idev = DEVTOISA(dev);
 572         struct resource_list *rl = &idev->id_resources;
 573         int retval = 0;
 574
 575         retval += bus_print_child_header(bus, dev);
 576
 577         if (SLIST_FIRST(rl) || device_get_flags(dev))
 578                 retval += printf(" at");
 579
 580         isa_print_resources(rl, "port", SYS_RES_IOPORT, ISA_NPORT, "%#lx");
 581         isa_print_resources(rl, "iomem", SYS_RES_MEMORY, ISA_NMEM, "%#lx");
 582         isa_print_resources(rl, "irq", SYS_RES_IRQ, ISA_NIRQ, "%ld");
 583         isa_print_resources(rl, "drq", SYS_RES_DRQ, ISA_NDRQ, "%ld");
 584         if (device_get_flags(dev))
 585                 retval += printf(" flags %#x", device_get_flags(dev));
 586
 587         retval += bus_print_child_footer(bus, dev);
 588
 589         return (retval);
 590 }
 591
 592 static int
 593 isa_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
 594 {
 595         struct isa_device* idev = DEVTOISA(dev);
 596         struct resource_list *rl = &idev->id_resources;
 597         struct resource_list_entry *rle;
 598
 599         switch (index) {
 600         case ISA_IVAR_PORT_0:
 601                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
 602                 if (rle)
 603                         *result = rle->start;
 604                 else
 605                         *result = -1;
 606                 break;
 607
 608         case ISA_IVAR_PORT_1:
 609                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
 610                 if (rle)
 611                         *result = rle->start;
 612                 else
 613                         *result = -1;
 614                 break;
 615
 616         case ISA_IVAR_PORTSIZE_0:
 617                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
 618                 if (rle)
 619                         *result = rle->count;
 620                 else
 621                         *result = 0;
 622                 break;
 623
 624         case ISA_IVAR_PORTSIZE_1:
 625                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
 626                 if (rle)
 627                         *result = rle->count;
 628                 else
 629                         *result = 0;
 630                 break;
 631
 632         case ISA_IVAR_MADDR_0:
 633                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
 634                 if (rle)
 635                         *result = rle->start;
 636                 else
 637                         *result = -1;
 638                 break;
 639
 640         case ISA_IVAR_MADDR_1:
 641                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
 642                 if (rle)
 643                         *result = rle->start;
 644                 else
 645                         *result = -1;
 646                 break;
 647
 648         case ISA_IVAR_MSIZE_0:
 649                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
 650                 if (rle)
 651                         *result = rle->count;
 652                 else
 653                         *result = 0;
 654                 break;
 655
 656         case ISA_IVAR_MSIZE_1:
 657                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
 658                 if (rle)
 659                         *result = rle->count;
 660                 else
 661                         *result = 0;
 662                 break;
 663
 664         case ISA_IVAR_IRQ_0:
 665                 rle = resource_list_find(rl, SYS_RES_IRQ, 0);
 666                 if (rle)
 667                         *result = rle->start;
 668                 else
 669                         *result = -1;
 670                 break;
 671
 672         case ISA_IVAR_IRQ_1:
 673                 rle = resource_list_find(rl, SYS_RES_IRQ, 1);
 674                 if (rle)
 675                         *result = rle->start;
 676                 else
 677                         *result = -1;
 678                 break;
 679
 680         case ISA_IVAR_DRQ_0:
 681                 rle = resource_list_find(rl, SYS_RES_DRQ, 0);
 682                 if (rle)
 683                         *result = rle->start;
 684                 else
 685                         *result = -1;
 686                 break;
 687
 688         case ISA_IVAR_DRQ_1:
 689                 rle = resource_list_find(rl, SYS_RES_DRQ, 1);
 690                 if (rle)
 691                         *result = rle->start;
 692                 else
 693                         *result = -1;
 694                 break;
 695
 696         case ISA_IVAR_VENDORID:
 697                 *result = idev->id_vendorid;
 698                 break;
 699
 700         case ISA_IVAR_SERIAL:
 701                 *result = idev->id_serial;
 702                 break;
 703
 704         case ISA_IVAR_LOGICALID:
 705                 *result = idev->id_logicalid;
 706                 break;
 707
 708         case ISA_IVAR_COMPATID:
 709                 *result = idev->id_compatid;
 710                 break;
 711
 712         default:
 713                 return ENOENT;
 714         }
 715
 716         return 0;
 717 }
 718
 719 static int
 720 isa_write_ivar(device_t bus, device_t dev,
 721                int index, uintptr_t value)
 722 {
 723         struct isa_device* idev = DEVTOISA(dev);
 724
 725         switch (index) {
 726         case ISA_IVAR_PORT_0:
 727         case ISA_IVAR_PORT_1:
 728         case ISA_IVAR_PORTSIZE_0:
 729         case ISA_IVAR_PORTSIZE_1:
 730         case ISA_IVAR_MADDR_0:
 731         case ISA_IVAR_MADDR_1:
 732         case ISA_IVAR_MSIZE_0:
 733         case ISA_IVAR_MSIZE_1:
 734         case ISA_IVAR_IRQ_0:
 735         case ISA_IVAR_IRQ_1:
 736         case ISA_IVAR_DRQ_0:
 737         case ISA_IVAR_DRQ_1:
 738                 return EINVAL;
 739
 740         case ISA_IVAR_VENDORID:
 741                 idev->id_vendorid = value;
 742                 break;
 743
 744         case ISA_IVAR_SERIAL:
 745                 idev->id_serial = value;
 746                 break;
 747
 748         case ISA_IVAR_LOGICALID:
 749                 idev->id_logicalid = value;
 750                 break;
 751
 752         case ISA_IVAR_COMPATID:
 753                 idev->id_compatid = value;
 754                 break;
 755
 756         default:
 757                 return (ENOENT);
 758         }
 759
 760         return (0);
 761 }
 762
 763 /*
 764  * Free any resources which the driver missed or which we were holding for
 765  * it (see isa_probe_children).
 766  */
 767 static void
 768 isa_child_detached(device_t dev, device_t child)
 769 {
 770         struct isa_device* idev = DEVTOISA(child);
 771         struct resource_list *rl = &idev->id_resources;
 772         struct resource_list_entry *rle;
 773
 774         SLIST_FOREACH(rle, &idev->id_resources, link) {
 775                 if (rle->res)
 776                         resource_list_release(rl, dev, child,
 777                                               rle->type,
 778                                               rle->rid,
 779                                               rle->res);
 780         }
 781 }
 782
 783 static void
 784 isa_driver_added(device_t dev, driver_t *driver)
 785 {
 786         device_t *children;
 787         int nchildren, i;
 788
 789         /*
 790          * Don't do anything if drivers are dynamically
 791          * added during autoconfiguration (cf. ymf724).
 792          * since that would end up calling identify
 793          * twice.
 794          */
 795         if (!isa_running)
 796                 return;
 797
 798         DEVICE_IDENTIFY(driver, dev);
 799         if (device_get_children(dev, &children, &nchildren))
 800                 return;
 801
 802         for (i = 0; i < nchildren; i++) {
 803                 device_t child = children[i];
 804                 struct isa_device *idev = DEVTOISA(child);
 805                 struct resource_list *rl = &idev->id_resources;
 806                 struct resource_list_entry *rle;
 807
 808                 if (device_get_state(child) != DS_NOTPRESENT)
 809                         continue;
 810
 811                 if (TAILQ_FIRST(&idev->id_configs))
 812                         if (!isa_assign_resources(child))
 813                                 continue;
 814
 815                 device_probe_and_attach(child);
 816
 817                 if (TAILQ_FIRST(&idev->id_configs)) {
 818                         /*
 819                          * Claim any unallocated resources to keep other
 820                          * devices from using them.
 821                          */
 822                         SLIST_FOREACH(rle, rl, link) {
 823                                 if (!rle->res) {
 824                                         int rid = rle->rid;
 825                                         resource_list_alloc(rl, dev, child,
 826                                                             rle->type,
 827                                                             &rid,
 828                                                             0, ~0, 1,
 829                                                             RF_ACTIVE);
 830                                 }
 831                         }
 832                 }
 833         }
 834
 835         free(children, M_TEMP);
 836 }
 837
 838 static int
 839 isa_set_resource(device_t dev, device_t child, int type, int rid,
 840                  u_long start, u_long count)
 841 {
 842         struct isa_device* idev = DEVTOISA(child);
 843         struct resource_list *rl = &idev->id_resources;
 844
 845         if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY
 846             && type != SYS_RES_IRQ && type != SYS_RES_DRQ)
 847                 return EINVAL;
 848         if (rid < 0)
 849                 return EINVAL;
 850         if (type == SYS_RES_IOPORT && rid >= ISA_NPORT)
 851                 return EINVAL;
 852         if (type == SYS_RES_MEMORY && rid >= ISA_NMEM)
 853                 return EINVAL;
 854         if (type == SYS_RES_IRQ && rid >= ISA_NIRQ)
 855                 return EINVAL;
 856         if (type == SYS_RES_DRQ && rid >= ISA_NDRQ)
 857                 return EINVAL;
 858
 859         resource_list_add(rl, type, rid, start, start + count - 1, count);
 860
 861         return 0;
 862 }
 863
 864 static int
 865 isa_get_resource(device_t dev, device_t child, int type, int rid,
 866                  u_long *startp, u_long *countp)
 867 {
 868         struct isa_device* idev = DEVTOISA(child);
 869         struct resource_list *rl = &idev->id_resources;
 870         struct resource_list_entry *rle;
 871
 872         rle = resource_list_find(rl, type, rid);
 873         if (!rle)
 874                 return ENOENT;
 875
 876         if (startp)
 877                 *startp = rle->start;
 878         if (countp)
 879                 *countp = rle->count;
 880
 881         return 0;
 882 }
 883
 884 static void
 885 isa_delete_resource(device_t dev, device_t child, int type, int rid)
 886 {
 887         struct isa_device* idev = DEVTOISA(child);
 888         struct resource_list *rl = &idev->id_resources;
 889         resource_list_delete(rl, type, rid);
 890 }
 891
 892 static int
 893 isa_add_config(device_t dev, device_t child,
 894                int priority, struct isa_config *config)
 895 {
 896         struct isa_device* idev = DEVTOISA(child);
 897         struct isa_config_entry *newice, *ice;
 898
 899         newice = malloc(sizeof *ice, M_DEVBUF, M_NOWAIT);
 900         if (!newice)
 901                 return ENOMEM;
 902
 903         newice->ice_priority = priority;
 904         newice->ice_config = *config;
 905
 906         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
 907                 if (ice->ice_priority > priority)
 908                         break;
 909         }
 910         if (ice)
 911                 TAILQ_INSERT_BEFORE(ice, newice, ice_link);
 912         else
 913                 TAILQ_INSERT_TAIL(&idev->id_configs, newice, ice_link);
 914
 915         return 0;
 916 }
 917
 918 static void
 919 isa_set_config_callback(device_t dev, device_t child,
 920                         isa_config_cb *fn, void *arg)
 921 {
 922         struct isa_device* idev = DEVTOISA(child);
 923
 924         idev->id_config_cb = fn;
 925         idev->id_config_arg = arg;
 926 }
 927
 928 static int
 929 isa_pnp_probe(device_t dev, device_t child, struct isa_pnp_id *ids)
 930 {
 931         struct isa_device* idev = DEVTOISA(child);
 932
 933         if (!idev->id_vendorid)
 934                 return ENOENT;
 935
 936         while (ids->ip_id) {
 937                 /*
 938                  * Really ought to support >1 compat id per device.
 939                  */
 940                 if (idev->id_logicalid == ids->ip_id
 941                     || idev->id_compatid == ids->ip_id) {
 942                         if (ids->ip_desc)
 943                                 device_set_desc(child, ids->ip_desc);
 944                         return 0;
 945                 }
 946                 ids++;
 947         }
 948
 949         return ENXIO;
 950 }
 951
 952 static device_method_t isa_methods[] = {
 953         /* Device interface */
 954         DEVMETHOD(device_probe,         isa_probe),
 955         DEVMETHOD(device_attach,        isa_attach),
 956         DEVMETHOD(device_detach,        bus_generic_detach),
 957         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 958         DEVMETHOD(device_suspend,       bus_generic_suspend),
 959         DEVMETHOD(device_resume,        bus_generic_resume),
 960
 961         /* Bus interface */
 962         DEVMETHOD(bus_add_child,        isa_add_child),
 963         DEVMETHOD(bus_print_child,      isa_print_child),
 964         DEVMETHOD(bus_read_ivar,        isa_read_ivar),
 965         DEVMETHOD(bus_write_ivar,       isa_write_ivar),
 966         DEVMETHOD(bus_child_detached,   isa_child_detached),
 967         DEVMETHOD(bus_driver_added,     isa_driver_added),
 968         DEVMETHOD(bus_alloc_resource,   isa_alloc_resource),
 969         DEVMETHOD(bus_release_resource, isa_release_resource),
 970         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
 971         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
 972         DEVMETHOD(bus_setup_intr,       isa_setup_intr),
 973         DEVMETHOD(bus_teardown_intr,    isa_teardown_intr),
 974         DEVMETHOD(bus_set_resource,     isa_set_resource),
 975         DEVMETHOD(bus_get_resource,     isa_get_resource),
 976         DEVMETHOD(bus_delete_resource,  isa_delete_resource),
 977
 978         /* ISA interface */
 979         DEVMETHOD(isa_add_config,       isa_add_config),
 980         DEVMETHOD(isa_set_config_callback, isa_set_config_callback),
 981         DEVMETHOD(isa_pnp_probe,        isa_pnp_probe),
 982
 983         { 0, 0 }
 984 };
 985
 986 static driver_t isa_driver = {
 987         "isa",
 988         isa_methods,
 989         1,                      /* no softc */
 990 };
 991
 992 /*
 993  * ISA can be attached to a PCI-ISA bridge or directly to the nexus.
 994  */
 995 DRIVER_MODULE(isa, isab, isa_driver, isa_devclass, 0, 0);
 996 #ifdef __i386__
 997 DRIVER_MODULE(isa, nexus, isa_driver, isa_devclass, 0, 0);
 998 #endif
 999
1000 /*
1001  * A fallback driver for reporting un-matched pnp devices.
1002  */
1003
1004 static int
1005 unknown_probe(device_t dev)
1006 {
1007         /*
1008          * Only match pnp devices.
1009          */
1010         if (isa_get_vendorid(dev) != 0)
1011                 return -100;
1012         return ENXIO;
1013 }
1014
1015 static int
1016 unknown_attach(device_t dev)
1017 {
1018         return 0;
1019 }
1020
1021 static int
1022 unknown_detach(device_t dev)
1023 {
1024         return 0;
1025 }
1026
1027 static device_method_t unknown_methods[] = {
1028         /* Device interface */
1029         DEVMETHOD(device_probe,         unknown_probe),
1030         DEVMETHOD(device_attach,        unknown_attach),
1031         DEVMETHOD(device_detach,        unknown_detach),
1032
1033         { 0, 0 }
1034 };
1035
1036 static driver_t unknown_driver = {
1037         "unknown",
1038         unknown_methods,
1039         1,                      /* no softc */
1040 };
1041
1042 static devclass_t unknown_devclass;
1043
1044 DRIVER_MODULE(unknown, isa, unknown_driver, unknown_devclass, 0, 0);