kernel/isa: Remove empty isa_init() (formerly used for COMPAT_OLDISA).
[dragonfly.git] / 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 #include <sys/machintr.h>
70
71 #include "isavar.h"
72 #include "isa_common.h"
73
74 static int      isa_print_child         (device_t, device_t);
75
76 MALLOC_DEFINE(M_ISADEV, "isadev", "ISA device");
77
78 static devclass_t isa_devclass;
79 static int isa_running;
80
81 /*
82  * At 'probe' time, we add all the devices which we know about to the
83  * bus.  The generic attach routine will probe and attach them if they
84  * are alive.
85  */
86 static int
87 isa_probe(device_t dev)
88 {
89         device_set_desc(dev, "ISA bus");
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, -1);
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, -1);
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, machintr_legacy_intr_cpuid(irq));
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, -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, &rid, 0, ~0, 1,
507                                             0 /* !RF_ACTIVE */, -1);
508                                 }
509                         }
510                 }
511         }
512
513         kfree(children, M_TEMP);
514
515         isa_running = 1;
516 }
517
518 /*
519  * Add a new child with default ivars.
520  */
521 static device_t
522 isa_add_child(device_t bus, device_t parent, int order, const char *name, int unit)
523 {
524         device_t child;
525         struct  isa_device *idev;
526
527         idev = kmalloc(sizeof(struct isa_device), M_ISADEV, M_WAITOK | M_ZERO);
528
529         resource_list_init(&idev->id_resources);
530         TAILQ_INIT(&idev->id_configs);
531
532         child = device_add_child_ordered(parent, order, name, unit);
533         device_set_ivars(child, idev);
534
535         return child;
536 }
537
538 static int
539 isa_print_resources(struct resource_list *rl, const char *name, int type,
540                     int count, const char *format)
541 {
542         struct resource_list_entry *rle;
543         int printed;
544         int i, retval = 0;
545
546         printed = 0;
547         for (i = 0; i < count; i++) {
548                 rle = resource_list_find(rl, type, i);
549                 if (rle) {
550                         if (printed == 0)
551                                 retval += kprintf(" %s ", name);
552                         else if (printed > 0)
553                                 retval += kprintf(",");
554                         printed++;
555                         retval += kprintf(format, rle->start);
556                         if (rle->count > 1) {
557                                 retval += kprintf("-");
558                                 retval += kprintf(format,
559                                                  rle->start + rle->count - 1);
560                         }
561                 } else if (i > 3) {
562                         /* check the first few regardless */
563                         break;
564                 }
565         }
566         return retval;
567 }
568
569 static int
570 isa_print_all_resources(device_t dev)
571 {
572         struct  isa_device *idev = DEVTOISA(dev);
573         struct resource_list *rl = &idev->id_resources;
574         int retval = 0;
575
576         if (SLIST_FIRST(rl) || device_get_flags(dev))
577                 retval += kprintf(" at");
578         
579         retval += isa_print_resources(rl, "port", SYS_RES_IOPORT,
580                                       ISA_NPORT, "%#lx");
581         retval += isa_print_resources(rl, "iomem", SYS_RES_MEMORY,
582                                       ISA_NMEM, "%#lx");
583         retval += isa_print_resources(rl, "irq", SYS_RES_IRQ,
584                                       ISA_NIRQ, "%ld");
585         retval += isa_print_resources(rl, "drq", SYS_RES_DRQ,
586                                       ISA_NDRQ, "%ld");
587         if (device_get_flags(dev))
588                 retval += kprintf(" flags %#x", device_get_flags(dev));
589
590         return retval;
591 }
592
593 static int
594 isa_print_child(device_t bus, device_t dev)
595 {
596         int retval = 0;
597
598         retval += bus_print_child_header(bus, dev);
599         retval += isa_print_all_resources(dev);
600         retval += bus_print_child_footer(bus, dev);
601
602         return (retval);
603 }
604
605 static void
606 isa_probe_nomatch(device_t dev, device_t child)
607 {
608         if (bootverbose) {
609                 bus_print_child_header(dev, child);
610                 kprintf(" failed to probe");
611                 isa_print_all_resources(child);
612                 bus_print_child_footer(dev, child);
613         }
614                                       
615         return;
616 }
617
618 static int
619 isa_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
620 {
621         struct isa_device* idev = DEVTOISA(dev);
622         struct resource_list *rl = &idev->id_resources;
623         struct resource_list_entry *rle;
624
625         switch (index) {
626         case ISA_IVAR_PORT_0:
627                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
628                 if (rle)
629                         *result = rle->start;
630                 else
631                         *result = -1;
632                 break;
633
634         case ISA_IVAR_PORT_1:
635                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
636                 if (rle)
637                         *result = rle->start;
638                 else
639                         *result = -1;
640                 break;
641
642         case ISA_IVAR_PORTSIZE_0:
643                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
644                 if (rle)
645                         *result = rle->count;
646                 else
647                         *result = 0;
648                 break;
649
650         case ISA_IVAR_PORTSIZE_1:
651                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
652                 if (rle)
653                         *result = rle->count;
654                 else
655                         *result = 0;
656                 break;
657
658         case ISA_IVAR_MADDR_0:
659                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
660                 if (rle)
661                         *result = rle->start;
662                 else
663                         *result = -1;
664                 break;
665
666         case ISA_IVAR_MADDR_1:
667                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
668                 if (rle)
669                         *result = rle->start;
670                 else
671                         *result = -1;
672                 break;
673
674         case ISA_IVAR_MSIZE_0:
675                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
676                 if (rle)
677                         *result = rle->count;
678                 else
679                         *result = 0;
680                 break;
681
682         case ISA_IVAR_MSIZE_1:
683                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
684                 if (rle)
685                         *result = rle->count;
686                 else
687                         *result = 0;
688                 break;
689
690         case ISA_IVAR_IRQ_0:
691                 rle = resource_list_find(rl, SYS_RES_IRQ, 0);
692                 if (rle)
693                         *result = rle->start;
694                 else
695                         *result = -1;
696                 break;
697
698         case ISA_IVAR_IRQ_1:
699                 rle = resource_list_find(rl, SYS_RES_IRQ, 1);
700                 if (rle)
701                         *result = rle->start;
702                 else
703                         *result = -1;
704                 break;
705
706         case ISA_IVAR_DRQ_0:
707                 rle = resource_list_find(rl, SYS_RES_DRQ, 0);
708                 if (rle)
709                         *result = rle->start;
710                 else
711                         *result = -1;
712                 break;
713
714         case ISA_IVAR_DRQ_1:
715                 rle = resource_list_find(rl, SYS_RES_DRQ, 1);
716                 if (rle)
717                         *result = rle->start;
718                 else
719                         *result = -1;
720                 break;
721
722         case ISA_IVAR_VENDORID:
723                 *result = idev->id_vendorid;
724                 break;
725
726         case ISA_IVAR_SERIAL:
727                 *result = idev->id_serial;
728                 break;
729
730         case ISA_IVAR_LOGICALID:
731                 *result = idev->id_logicalid;
732                 break;
733
734         case ISA_IVAR_COMPATID:
735                 *result = idev->id_compatid;
736                 break;
737
738         default:
739                 return ENOENT;
740         }
741
742         return 0;
743 }
744
745 static int
746 isa_write_ivar(device_t bus, device_t dev,
747                int index, uintptr_t value)
748 {
749         struct isa_device* idev = DEVTOISA(dev);
750
751         switch (index) {
752         case ISA_IVAR_PORT_0:
753         case ISA_IVAR_PORT_1:
754         case ISA_IVAR_PORTSIZE_0:
755         case ISA_IVAR_PORTSIZE_1:
756         case ISA_IVAR_MADDR_0:
757         case ISA_IVAR_MADDR_1:
758         case ISA_IVAR_MSIZE_0:
759         case ISA_IVAR_MSIZE_1:
760         case ISA_IVAR_IRQ_0:
761         case ISA_IVAR_IRQ_1:
762         case ISA_IVAR_DRQ_0:
763         case ISA_IVAR_DRQ_1:
764                 return EINVAL;
765
766         case ISA_IVAR_VENDORID:
767                 idev->id_vendorid = value;
768                 break;
769
770         case ISA_IVAR_SERIAL:
771                 idev->id_serial = value;
772                 break;
773
774         case ISA_IVAR_LOGICALID:
775                 idev->id_logicalid = value;
776                 break;
777
778         case ISA_IVAR_COMPATID:
779                 idev->id_compatid = value;
780                 break;
781
782         default:
783                 return (ENOENT);
784         }
785
786         return (0);
787 }
788
789 /*
790  * Free any resources which the driver missed or which we were holding for
791  * it (see isa_probe_children).
792  */
793 static void
794 isa_child_detached(device_t dev, device_t child)
795 {
796         struct isa_device* idev = DEVTOISA(child);
797         struct resource_list *rl = &idev->id_resources;
798         struct resource_list_entry *rle;
799
800         if (TAILQ_FIRST(&idev->id_configs)) {
801                 /*
802                  * Claim any unallocated resources to keep other
803                  * devices from using them.
804                  */
805                 SLIST_FOREACH(rle, rl, link) {
806                         if (!rle->res) {
807                                 int rid = rle->rid;
808                                 resource_list_alloc(rl, dev, child,
809                                     rle->type, &rid, 0, ~0, 1,
810                                     0 /* !RF_ACTIVE */, -1);
811                         }
812                 }
813         }
814 }
815
816 static void
817 isa_driver_added(device_t dev, driver_t *driver)
818 {
819         device_t *children;
820         int nchildren, i;
821
822         /*
823          * Don't do anything if drivers are dynamically
824          * added during autoconfiguration (cf. ymf724).
825          * since that would end up calling identify
826          * twice.
827          */
828         if (!isa_running)
829                 return;
830
831         DEVICE_IDENTIFY(driver, dev);
832         if (device_get_children(dev, &children, &nchildren))
833                 return;
834
835         for (i = 0; i < nchildren; i++) {
836                 device_t child = children[i];
837                 struct isa_device *idev = DEVTOISA(child);
838                 struct resource_list *rl = &idev->id_resources;
839                 struct resource_list_entry *rle;
840
841                 if (device_get_state(child) != DS_NOTPRESENT)
842                         continue;
843                 if (!device_is_enabled(child))
844                         continue;
845
846                 /*
847                  * Free resources which we were holding on behalf of
848                  * the device.
849                  */
850                 SLIST_FOREACH(rle, &idev->id_resources, link) {
851                         if (rle->res)
852                                 resource_list_release(rl, dev, child,
853                                                       rle->type,
854                                                       rle->rid,
855                                                       rle->res);
856                 }
857
858                 if (TAILQ_FIRST(&idev->id_configs))
859                         if (!isa_assign_resources(child))
860                                 continue;
861
862                 device_probe_and_attach(child);
863
864                 if (TAILQ_FIRST(&idev->id_configs)) {
865                         /*
866                          * Claim any unallocated resources to keep other
867                          * devices from using them.
868                          */
869                         SLIST_FOREACH(rle, rl, link) {
870                                 if (!rle->res) {
871                                         int rid = rle->rid;
872                                         resource_list_alloc(rl, dev, child,
873                                             rle->type, &rid, 0, ~0, 1,
874                                             0 /* !RF_ACTIVE */, -1);
875                                 }
876                         }
877                 }
878         }
879
880         kfree(children, M_TEMP);
881 }
882
883 static int
884 isa_set_resource(device_t dev, device_t child, int type, int rid,
885                  u_long start, u_long count, int cpuid)
886 {
887         struct isa_device* idev = DEVTOISA(child);
888         struct resource_list *rl = &idev->id_resources;
889
890         if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY
891             && type != SYS_RES_IRQ && type != SYS_RES_DRQ)
892                 return EINVAL;
893         if (rid < 0)
894                 return EINVAL;
895         if (type == SYS_RES_IOPORT && rid >= ISA_NPORT)
896                 return EINVAL;
897         if (type == SYS_RES_MEMORY && rid >= ISA_NMEM)
898                 return EINVAL;
899         if (type == SYS_RES_IRQ && rid >= ISA_NIRQ)
900                 return EINVAL;
901         if (type == SYS_RES_DRQ && rid >= ISA_NDRQ)
902                 return EINVAL;
903
904         resource_list_add(rl, type, rid, start, start + count - 1, count,
905             cpuid);
906
907         return 0;
908 }
909
910 static int
911 isa_get_resource(device_t dev, device_t child, int type, int rid,
912                  u_long *startp, u_long *countp)
913 {
914         struct isa_device* idev = DEVTOISA(child);
915         struct resource_list *rl = &idev->id_resources;
916         struct resource_list_entry *rle;
917
918         rle = resource_list_find(rl, type, rid);
919         if (!rle)
920                 return ENOENT;
921         
922         if (startp)
923                 *startp = rle->start;
924         if (countp)
925                 *countp = rle->count;
926
927         return 0;
928 }
929
930 static void
931 isa_delete_resource(device_t dev, device_t child, int type, int rid)
932 {
933         struct isa_device* idev = DEVTOISA(child);
934         struct resource_list *rl = &idev->id_resources;
935         resource_list_delete(rl, type, rid);
936 }
937
938 static int
939 isa_add_config(device_t dev, device_t child,
940                int priority, struct isa_config *config)
941 {
942         struct isa_device* idev = DEVTOISA(child);
943         struct isa_config_entry *newice, *ice;
944
945         newice = kmalloc(sizeof *ice, M_DEVBUF, M_WAITOK);
946         newice->ice_priority = priority;
947         newice->ice_config = *config;
948         
949         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
950                 if (ice->ice_priority > priority)
951                         break;
952         }
953         if (ice)
954                 TAILQ_INSERT_BEFORE(ice, newice, ice_link);
955         else
956                 TAILQ_INSERT_TAIL(&idev->id_configs, newice, ice_link);
957
958         return 0;
959 }
960
961 static void
962 isa_set_config_callback(device_t dev, device_t child,
963                         isa_config_cb *fn, void *arg)
964 {
965         struct isa_device* idev = DEVTOISA(child);
966
967         idev->id_config_cb = fn;
968         idev->id_config_arg = arg;
969 }
970
971 static int
972 isa_pnp_probe(device_t dev, device_t child, struct isa_pnp_id *ids)
973 {
974         struct isa_device* idev = DEVTOISA(child);
975
976         if (!idev->id_vendorid)
977                 return ENOENT;
978
979         while (ids->ip_id) {
980                 /*
981                  * Really ought to support >1 compat id per device.
982                  */
983                 if (idev->id_logicalid == ids->ip_id
984                     || idev->id_compatid == ids->ip_id) {
985                         if (ids->ip_desc)
986                                 device_set_desc(child, ids->ip_desc);
987                         return 0;
988                 }
989                 ids++;
990         }
991
992         return ENXIO;
993 }
994
995 static device_method_t isa_methods[] = {
996         /* Device interface */
997         DEVMETHOD(device_probe,         isa_probe),
998         DEVMETHOD(device_attach,        isa_attach),
999         DEVMETHOD(device_detach,        bus_generic_detach),
1000         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1001         DEVMETHOD(device_suspend,       bus_generic_suspend),
1002         DEVMETHOD(device_resume,        bus_generic_resume),
1003
1004         /* Bus interface */
1005         DEVMETHOD(bus_add_child,        isa_add_child),
1006         DEVMETHOD(bus_print_child,      isa_print_child),
1007         DEVMETHOD(bus_probe_nomatch,    isa_probe_nomatch),     
1008         DEVMETHOD(bus_read_ivar,        isa_read_ivar),
1009         DEVMETHOD(bus_write_ivar,       isa_write_ivar),
1010         DEVMETHOD(bus_child_detached,   isa_child_detached),
1011         DEVMETHOD(bus_driver_added,     isa_driver_added),
1012         DEVMETHOD(bus_alloc_resource,   isa_alloc_resource),
1013         DEVMETHOD(bus_release_resource, isa_release_resource),
1014         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
1015         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
1016         DEVMETHOD(bus_setup_intr,       isa_setup_intr),
1017         DEVMETHOD(bus_teardown_intr,    isa_teardown_intr),
1018         DEVMETHOD(bus_set_resource,     isa_set_resource),
1019         DEVMETHOD(bus_get_resource,     isa_get_resource),
1020         DEVMETHOD(bus_delete_resource,  isa_delete_resource),
1021
1022         /* ISA interface */
1023         DEVMETHOD(isa_add_config,       isa_add_config),
1024         DEVMETHOD(isa_set_config_callback, isa_set_config_callback),
1025         DEVMETHOD(isa_pnp_probe,        isa_pnp_probe),
1026
1027         DEVMETHOD_END
1028 };
1029
1030 static driver_t isa_driver = {
1031         "isa",
1032         isa_methods,
1033         1,                      /* no softc */
1034 };
1035
1036 /*
1037  * ISA can be attached to a PCI-ISA bridge or directly to the nexus.
1038  */
1039 DRIVER_MODULE(isa, isab, isa_driver, isa_devclass, NULL, NULL);
1040 #ifdef __i386__
1041 DRIVER_MODULE(isa, nexus, isa_driver, isa_devclass, NULL, NULL);
1042 #endif
1043 MODULE_VERSION(isa, 1);
1044
1045 /*
1046  * Code common to ISA bridges.
1047  */
1048 int
1049 isab_attach(device_t dev)
1050 {
1051         device_t child;
1052
1053         child = device_add_child(dev, "isa", 0);
1054         if (child != NULL)
1055                 return (bus_generic_attach(dev));
1056         return (ENXIO);
1057 }