This commit represents a major revamping of the clock interrupt and timebase
[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  * $DragonFly: src/sys/bus/isa/isa_common.c,v 1.4 2003/08/27 11:42:34 rob Exp $
28  */
29 /*
30  * Modifications for Intel architecture by Garrett A. Wollman.
31  * Copyright 1998 Massachusetts Institute of Technology
32  *
33  * Permission to use, copy, modify, and distribute this software and
34  * its documentation for any purpose and without fee is hereby
35  * granted, provided that both the above copyright notice and this
36  * permission notice appear in all copies, that both the above
37  * copyright notice and this permission notice appear in all
38  * supporting documentation, and that the name of M.I.T. not be used
39  * in advertising or publicity pertaining to distribution of the
40  * software without specific, written prior permission.  M.I.T. makes
41  * no representations about the suitability of this software for any
42  * purpose.  It is provided "as is" without express or implied
43  * warranty.
44  * 
45  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
46  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
47  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
48  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
49  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
50  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
51  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
52  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
53  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
54  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
55  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56  * SUCH DAMAGE.
57  */
58
59 /*
60  * Parts of the ISA bus implementation common to all architectures.
61  */
62
63 #include <sys/param.h>
64 #include <sys/systm.h>
65 #include <sys/kernel.h>
66 #include <sys/bus.h>
67 #include <sys/malloc.h>
68 #include <sys/module.h>
69 #include <machine/bus.h>
70 #include <sys/rman.h>
71
72 #include <machine/resource.h>
73
74 #include "isavar.h"
75 #include "isa_common.h"
76 #ifdef __alpha__                /* XXX workaround a stupid warning */
77 #include "isavar.h"
78 #endif
79
80 static int      isa_print_child         (device_t, device_t);
81
82 MALLOC_DEFINE(M_ISADEV, "isadev", "ISA device");
83
84 static devclass_t isa_devclass;
85 static int isa_running;
86
87 /*
88  * At 'probe' time, we add all the devices which we know about to the
89  * bus.  The generic attach routine will probe and attach them if they
90  * are alive.
91  */
92 static int
93 isa_probe(device_t dev)
94 {
95         device_set_desc(dev, "ISA bus");
96         isa_init();             /* Allow machdep code to initialise */
97         return 0;
98 }
99
100 extern device_t isa_bus_device;
101
102 static int
103 isa_attach(device_t dev)
104 {
105         /*
106          * Arrange for isa_probe_children(dev) to be called later. XXX
107          */
108         isa_bus_device = dev;
109         return 0;
110 }
111
112 /*
113  * Find a working set of memory regions for a child using the ranges
114  * in *config  and return the regions in *result. Returns non-zero if
115  * a set of ranges was found.
116  */
117 static int
118 isa_find_memory(device_t child,
119                 struct isa_config *config,
120                 struct isa_config *result)
121 {
122         int success, i;
123         struct resource *res[ISA_NMEM];
124
125         /*
126          * First clear out any existing resource definitions.
127          */
128         for (i = 0; i < ISA_NMEM; i++) {
129                 bus_delete_resource(child, SYS_RES_MEMORY, i);
130                 res[i] = NULL;
131         }
132
133         success = 1;
134         result->ic_nmem = config->ic_nmem;
135         for (i = 0; i < config->ic_nmem; i++) {
136                 u_int32_t start, end, size, align;
137                 for (start = config->ic_mem[i].ir_start,
138                              end = config->ic_mem[i].ir_end,
139                              size = config->ic_mem[i].ir_size,
140                              align = config->ic_mem[i].ir_align;
141                      start + size - 1 <= end;
142                      start += align) {
143                         bus_set_resource(child, SYS_RES_MEMORY, i,
144                                          start, size);
145                         res[i] = bus_alloc_resource(child,
146                                                     SYS_RES_MEMORY, &i,
147                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
148                         if (res[i]) {
149                                 result->ic_mem[i].ir_start = start;
150                                 result->ic_mem[i].ir_end = start + size - 1;
151                                 result->ic_mem[i].ir_size = size;
152                                 result->ic_mem[i].ir_align = align;
153                                 break;
154                         }
155                 }
156
157                 /*
158                  * If we didn't find a place for memory range i, then 
159                  * give up now.
160                  */
161                 if (!res[i]) {
162                         success = 0;
163                         break;
164                 }
165         }
166
167         for (i = 0; i < ISA_NMEM; i++) {
168                 if (res[i])
169                         bus_release_resource(child, SYS_RES_MEMORY,
170                                              i, res[i]);
171         }
172
173         return success;
174 }
175
176 /*
177  * Find a working set of port regions for a child using the ranges
178  * in *config  and return the regions in *result. Returns non-zero if
179  * a set of ranges was found.
180  */
181 static int
182 isa_find_port(device_t child,
183               struct isa_config *config,
184               struct isa_config *result)
185 {
186         int success, i;
187         struct resource *res[ISA_NPORT];
188
189         /*
190          * First clear out any existing resource definitions.
191          */
192         for (i = 0; i < ISA_NPORT; i++) {
193                 bus_delete_resource(child, SYS_RES_IOPORT, i);
194                 res[i] = NULL;
195         }
196
197         success = 1;
198         result->ic_nport = config->ic_nport;
199         for (i = 0; i < config->ic_nport; i++) {
200                 u_int32_t start, end, size, align;
201                 for (start = config->ic_port[i].ir_start,
202                              end = config->ic_port[i].ir_end,
203                              size = config->ic_port[i].ir_size,
204                              align = config->ic_port[i].ir_align;
205                      start + size - 1 <= end;
206                      start += align) {
207                         bus_set_resource(child, SYS_RES_IOPORT, i,
208                                          start, size);
209                         res[i] = bus_alloc_resource(child,
210                                                     SYS_RES_IOPORT, &i,
211                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
212                         if (res[i]) {
213                                 result->ic_port[i].ir_start = start;
214                                 result->ic_port[i].ir_end = start + size - 1;
215                                 result->ic_port[i].ir_size = size;
216                                 result->ic_port[i].ir_align = align;
217                                 break;
218                         }
219                 }
220
221                 /*
222                  * If we didn't find a place for port range i, then 
223                  * give up now.
224                  */
225                 if (!res[i]) {
226                         success = 0;
227                         break;
228                 }
229         }
230
231         for (i = 0; i < ISA_NPORT; i++) {
232                 if (res[i])
233                         bus_release_resource(child, SYS_RES_IOPORT,
234                                              i, res[i]);
235         }
236
237         return success;
238 }
239
240 /*
241  * Return the index of the first bit in the mask (or -1 if mask is empty.
242  */
243 static int
244 find_first_bit(u_int32_t mask)
245 {
246         return ffs(mask) - 1;
247 }
248
249 /*
250  * Return the index of the next bit in the mask, or -1 if there are no more.
251  */
252 static int
253 find_next_bit(u_int32_t mask, int bit)
254 {
255         bit++;
256         while (bit < 32 && !(mask & (1 << bit)))
257                 bit++;
258         if (bit != 32)
259                 return bit;
260         return -1;
261 }
262
263 /*
264  * Find a working set of irqs for a child using the masks in *config
265  * and return the regions in *result. Returns non-zero if a set of
266  * irqs was found.
267  */
268 static int
269 isa_find_irq(device_t child,
270              struct isa_config *config,
271              struct isa_config *result)
272 {
273         int success, i;
274         struct resource *res[ISA_NIRQ];
275
276         /*
277          * First clear out any existing resource definitions.
278          */
279         for (i = 0; i < ISA_NIRQ; i++) {
280                 bus_delete_resource(child, SYS_RES_IRQ, i);
281                 res[i] = NULL;
282         }
283
284         success = 1;
285         result->ic_nirq = config->ic_nirq;
286         for (i = 0; i < config->ic_nirq; i++) {
287                 u_int32_t mask = config->ic_irqmask[i];
288                 int irq;
289                 for (irq = find_first_bit(mask);
290                      irq != -1;
291                      irq = find_next_bit(mask, irq)) {
292                         bus_set_resource(child, SYS_RES_IRQ, i,
293                                          irq, 1);
294                         res[i] = bus_alloc_resource(child,
295                                                     SYS_RES_IRQ, &i,
296                                                     0, ~0, 1, 0 /* !RF_ACTIVE */ );
297                         if (res[i]) {
298                                 result->ic_irqmask[i] = (1 << irq);
299                                 break;
300                         }
301                 }
302
303                 /*
304                  * If we didn't find a place for irq range i, then 
305                  * give up now.
306                  */
307                 if (!res[i]) {
308                         success = 0;
309                         break;
310                 }
311         }
312
313         for (i = 0; i < ISA_NIRQ; i++) {
314                 if (res[i])
315                         bus_release_resource(child, SYS_RES_IRQ,
316                                              i, res[i]);
317         }
318
319         return success;
320 }
321
322 /*
323  * Find a working set of drqs for a child using the masks in *config
324  * and return the regions in *result. Returns non-zero if a set of
325  * drqs was found.
326  */
327 static int
328 isa_find_drq(device_t child,
329              struct isa_config *config,
330              struct isa_config *result)
331 {
332         int success, i;
333         struct resource *res[ISA_NDRQ];
334
335         /*
336          * First clear out any existing resource definitions.
337          */
338         for (i = 0; i < ISA_NDRQ; i++) {
339                 bus_delete_resource(child, SYS_RES_DRQ, i);
340                 res[i] = NULL;
341         }
342
343         success = 1;
344         result->ic_ndrq = config->ic_ndrq;
345         for (i = 0; i < config->ic_ndrq; i++) {
346                 u_int32_t mask = config->ic_drqmask[i];
347                 int drq;
348                 for (drq = find_first_bit(mask);
349                      drq != -1;
350                      drq = find_next_bit(mask, drq)) {
351                         bus_set_resource(child, SYS_RES_DRQ, i,
352                                          drq, 1);
353                         res[i] = bus_alloc_resource(child,
354                                                     SYS_RES_DRQ, &i,
355                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
356                         if (res[i]) {
357                                 result->ic_drqmask[i] = (1 << drq);
358                                 break;
359                         }
360                 }
361
362                 /*
363                  * If we didn't find a place for drq range i, then 
364                  * give up now.
365                  */
366                 if (!res[i]) {
367                         success = 0;
368                         break;
369                 }
370         }
371
372         for (i = 0; i < ISA_NDRQ; i++) {
373                 if (res[i])
374                         bus_release_resource(child, SYS_RES_DRQ,
375                                              i, res[i]);
376         }
377
378         return success;
379 }
380
381 /*
382  * Attempt to find a working set of resources for a device. Return
383  * non-zero if a working configuration is found.
384  */
385 static int
386 isa_assign_resources(device_t child)
387 {
388         struct isa_device *idev = DEVTOISA(child);
389         struct isa_config_entry *ice;
390         struct isa_config config;
391
392         bzero(&config, sizeof config);
393         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
394                 if (!isa_find_memory(child, &ice->ice_config, &config))
395                         continue;
396                 if (!isa_find_port(child, &ice->ice_config, &config))
397                         continue;
398                 if (!isa_find_irq(child, &ice->ice_config, &config))
399                         continue;
400                 if (!isa_find_drq(child, &ice->ice_config, &config))
401                         continue;
402
403                 /*
404                  * A working configuration was found enable the device 
405                  * with this configuration.
406                  */
407                 if (idev->id_config_cb) {
408                         idev->id_config_cb(idev->id_config_arg,
409                                            &config, 1);
410                         return 1;
411                 }
412         }
413
414         /*
415          * Disable the device.
416          */
417         bus_print_child_header(device_get_parent(child), child);
418         printf(" can't assign resources\n");
419         if (bootverbose)
420             isa_print_child(device_get_parent(child), child);
421         bzero(&config, sizeof config);
422         if (idev->id_config_cb)
423                 idev->id_config_cb(idev->id_config_arg, &config, 0);
424         device_disable(child);
425
426         return 0;
427 }
428
429 /*
430  * Called after other devices have initialised to probe for isa devices.
431  */
432 void
433 isa_probe_children(device_t dev)
434 {
435         device_t *children;
436         int nchildren, i;
437
438         /*
439          * Create all the children by calling driver's identify methods.
440          */
441         bus_generic_probe(dev);
442
443         if (device_get_children(dev, &children, &nchildren))
444                 return;
445
446         /*
447          * First disable all pnp devices so that they don't get
448          * matched by legacy probes.
449          */
450         if (bootverbose)
451                 printf("isa_probe_children: disabling PnP devices\n");
452         for (i = 0; i < nchildren; i++) {
453                 device_t child = children[i];
454                 struct isa_device *idev = DEVTOISA(child);
455                 struct isa_config config;
456
457                 bzero(&config, sizeof config);
458                 if (idev->id_config_cb)
459                         idev->id_config_cb(idev->id_config_arg, &config, 0);
460         }
461
462         /*
463          * Next probe all non-pnp devices so that they claim their
464          * resources first.
465          */
466         if (bootverbose)
467                 printf("isa_probe_children: probing non-PnP devices\n");
468         for (i = 0; i < nchildren; i++) {
469                 device_t child = children[i];
470                 struct isa_device *idev = DEVTOISA(child);
471
472                 if (TAILQ_FIRST(&idev->id_configs))
473                         continue;
474
475                 device_probe_and_attach(child);
476         }
477
478         /*
479          * Finally assign resource to pnp devices and probe them.
480          */
481         if (bootverbose)
482                 printf("isa_probe_children: probing PnP devices\n");
483         for (i = 0; i < nchildren; i++) {
484                 device_t child = children[i];
485                 struct isa_device* idev = DEVTOISA(child);
486
487                 if (!TAILQ_FIRST(&idev->id_configs))
488                         continue;
489
490                 if (isa_assign_resources(child)) {
491                         struct resource_list *rl = &idev->id_resources;
492                         struct resource_list_entry *rle;
493
494                         device_probe_and_attach(child);
495
496                         /*
497                          * Claim any unallocated resources to keep other
498                          * devices from using them.
499                          */
500                         SLIST_FOREACH(rle, rl, link) {
501                                 if (!rle->res) {
502                                         int rid = rle->rid;
503                                         resource_list_alloc(rl, dev, child,
504                                                             rle->type,
505                                                             &rid,
506                                                             0, ~0, 1,
507                                                             0 /* !RF_ACTIVE */);
508                                 }
509                         }
510                 }
511         }
512
513         free(children, M_TEMP);
514
515         isa_running = 1;
516 }
517
518 /*
519  * Add a new child with default ivars.
520  */
521 static device_t
522 isa_add_child(device_t dev, int order, const char *name, int unit)
523 {
524         device_t child;
525         struct  isa_device *idev;
526
527         idev = malloc(sizeof(struct isa_device), M_ISADEV, M_NOWAIT);
528         if (!idev)
529                 return 0;
530         bzero(idev, sizeof *idev);
531
532         resource_list_init(&idev->id_resources);
533         TAILQ_INIT(&idev->id_configs);
534
535         child = device_add_child_ordered(dev, order, name, unit);
536         device_set_ivars(child, idev);
537
538         return child;
539 }
540
541 static int
542 isa_print_resources(struct resource_list *rl, const char *name, int type,
543                     int count, const char *format)
544 {
545         struct resource_list_entry *rle;
546         int printed;
547         int i, retval = 0;;
548
549         printed = 0;
550         for (i = 0; i < count; i++) {
551                 rle = resource_list_find(rl, type, i);
552                 if (rle) {
553                         if (printed == 0)
554                                 retval += printf(" %s ", name);
555                         else if (printed > 0)
556                                 retval += printf(",");
557                         printed++;
558                         retval += printf(format, rle->start);
559                         if (rle->count > 1) {
560                                 retval += printf("-");
561                                 retval += printf(format,
562                                                  rle->start + rle->count - 1);
563                         }
564                 } else if (i > 3) {
565                         /* check the first few regardless */
566                         break;
567                 }
568         }
569         return retval;
570 }
571
572 static int
573 isa_print_all_resources(device_t dev)
574 {
575         struct  isa_device *idev = DEVTOISA(dev);
576         struct resource_list *rl = &idev->id_resources;
577         int retval = 0;
578
579         if (SLIST_FIRST(rl) || device_get_flags(dev))
580                 retval += printf(" at");
581         
582         retval += isa_print_resources(rl, "port", SYS_RES_IOPORT,
583                                       ISA_NPORT, "%#lx");
584         retval += isa_print_resources(rl, "iomem", SYS_RES_MEMORY,
585                                       ISA_NMEM, "%#lx");
586         retval += isa_print_resources(rl, "irq", SYS_RES_IRQ,
587                                       ISA_NIRQ, "%ld");
588         retval += isa_print_resources(rl, "drq", SYS_RES_DRQ,
589                                       ISA_NDRQ, "%ld");
590         if (device_get_flags(dev))
591                 retval += printf(" flags %#x", device_get_flags(dev));
592
593         return retval;
594 }
595
596 static int
597 isa_print_child(device_t bus, device_t dev)
598 {
599         int retval = 0;
600
601         retval += bus_print_child_header(bus, dev);
602         retval += isa_print_all_resources(dev);
603         retval += bus_print_child_footer(bus, dev);
604
605         return (retval);
606 }
607
608 static void
609 isa_probe_nomatch(device_t dev, device_t child)
610 {
611         if (bootverbose) {
612                 bus_print_child_header(dev, child);
613                 printf(" failed to probe");
614                 isa_print_all_resources(child);
615                 bus_print_child_footer(dev, child);
616         }
617                                       
618         return;
619 }
620
621 static int
622 isa_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
623 {
624         struct isa_device* idev = DEVTOISA(dev);
625         struct resource_list *rl = &idev->id_resources;
626         struct resource_list_entry *rle;
627
628         switch (index) {
629         case ISA_IVAR_PORT_0:
630                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
631                 if (rle)
632                         *result = rle->start;
633                 else
634                         *result = -1;
635                 break;
636
637         case ISA_IVAR_PORT_1:
638                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
639                 if (rle)
640                         *result = rle->start;
641                 else
642                         *result = -1;
643                 break;
644
645         case ISA_IVAR_PORTSIZE_0:
646                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
647                 if (rle)
648                         *result = rle->count;
649                 else
650                         *result = 0;
651                 break;
652
653         case ISA_IVAR_PORTSIZE_1:
654                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
655                 if (rle)
656                         *result = rle->count;
657                 else
658                         *result = 0;
659                 break;
660
661         case ISA_IVAR_MADDR_0:
662                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
663                 if (rle)
664                         *result = rle->start;
665                 else
666                         *result = -1;
667                 break;
668
669         case ISA_IVAR_MADDR_1:
670                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
671                 if (rle)
672                         *result = rle->start;
673                 else
674                         *result = -1;
675                 break;
676
677         case ISA_IVAR_MSIZE_0:
678                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
679                 if (rle)
680                         *result = rle->count;
681                 else
682                         *result = 0;
683                 break;
684
685         case ISA_IVAR_MSIZE_1:
686                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
687                 if (rle)
688                         *result = rle->count;
689                 else
690                         *result = 0;
691                 break;
692
693         case ISA_IVAR_IRQ_0:
694                 rle = resource_list_find(rl, SYS_RES_IRQ, 0);
695                 if (rle)
696                         *result = rle->start;
697                 else
698                         *result = -1;
699                 break;
700
701         case ISA_IVAR_IRQ_1:
702                 rle = resource_list_find(rl, SYS_RES_IRQ, 1);
703                 if (rle)
704                         *result = rle->start;
705                 else
706                         *result = -1;
707                 break;
708
709         case ISA_IVAR_DRQ_0:
710                 rle = resource_list_find(rl, SYS_RES_DRQ, 0);
711                 if (rle)
712                         *result = rle->start;
713                 else
714                         *result = -1;
715                 break;
716
717         case ISA_IVAR_DRQ_1:
718                 rle = resource_list_find(rl, SYS_RES_DRQ, 1);
719                 if (rle)
720                         *result = rle->start;
721                 else
722                         *result = -1;
723                 break;
724
725         case ISA_IVAR_VENDORID:
726                 *result = idev->id_vendorid;
727                 break;
728
729         case ISA_IVAR_SERIAL:
730                 *result = idev->id_serial;
731                 break;
732
733         case ISA_IVAR_LOGICALID:
734                 *result = idev->id_logicalid;
735                 break;
736
737         case ISA_IVAR_COMPATID:
738                 *result = idev->id_compatid;
739                 break;
740
741         default:
742                 return ENOENT;
743         }
744
745         return 0;
746 }
747
748 static int
749 isa_write_ivar(device_t bus, device_t dev,
750                int index, uintptr_t value)
751 {
752         struct isa_device* idev = DEVTOISA(dev);
753
754         switch (index) {
755         case ISA_IVAR_PORT_0:
756         case ISA_IVAR_PORT_1:
757         case ISA_IVAR_PORTSIZE_0:
758         case ISA_IVAR_PORTSIZE_1:
759         case ISA_IVAR_MADDR_0:
760         case ISA_IVAR_MADDR_1:
761         case ISA_IVAR_MSIZE_0:
762         case ISA_IVAR_MSIZE_1:
763         case ISA_IVAR_IRQ_0:
764         case ISA_IVAR_IRQ_1:
765         case ISA_IVAR_DRQ_0:
766         case ISA_IVAR_DRQ_1:
767                 return EINVAL;
768
769         case ISA_IVAR_VENDORID:
770                 idev->id_vendorid = value;
771                 break;
772
773         case ISA_IVAR_SERIAL:
774                 idev->id_serial = value;
775                 break;
776
777         case ISA_IVAR_LOGICALID:
778                 idev->id_logicalid = value;
779                 break;
780
781         case ISA_IVAR_COMPATID:
782                 idev->id_compatid = value;
783                 break;
784
785         default:
786                 return (ENOENT);
787         }
788
789         return (0);
790 }
791
792 /*
793  * Free any resources which the driver missed or which we were holding for
794  * it (see isa_probe_children).
795  */
796 static void
797 isa_child_detached(device_t dev, device_t child)
798 {
799         struct isa_device* idev = DEVTOISA(child);
800         struct resource_list *rl = &idev->id_resources;
801         struct resource_list_entry *rle;
802
803         if (TAILQ_FIRST(&idev->id_configs)) {
804                 /*
805                  * Claim any unallocated resources to keep other
806                  * devices from using them.
807                  */
808                 SLIST_FOREACH(rle, rl, link) {
809                         if (!rle->res) {
810                                 int rid = rle->rid;
811                                 resource_list_alloc(rl, dev, child,
812                                                     rle->type,
813                                                     &rid, 0, ~0, 1, 0);
814                         }
815                 }
816         }
817 }
818
819 static void
820 isa_driver_added(device_t dev, driver_t *driver)
821 {
822         device_t *children;
823         int nchildren, i;
824
825         /*
826          * Don't do anything if drivers are dynamically
827          * added during autoconfiguration (cf. ymf724).
828          * since that would end up calling identify
829          * twice.
830          */
831         if (!isa_running)
832                 return;
833
834         DEVICE_IDENTIFY(driver, dev);
835         if (device_get_children(dev, &children, &nchildren))
836                 return;
837
838         for (i = 0; i < nchildren; i++) {
839                 device_t child = children[i];
840                 struct isa_device *idev = DEVTOISA(child);
841                 struct resource_list *rl = &idev->id_resources;
842                 struct resource_list_entry *rle;
843
844                 if (device_get_state(child) != DS_NOTPRESENT)
845                         continue;
846                 if (!device_is_enabled(child))
847                         continue;
848
849                 /*
850                  * Free resources which we were holding on behalf of
851                  * the device.
852                  */
853                 SLIST_FOREACH(rle, &idev->id_resources, link) {
854                         if (rle->res)
855                                 resource_list_release(rl, dev, child,
856                                                       rle->type,
857                                                       rle->rid,
858                                                       rle->res);
859                 }
860
861                 if (TAILQ_FIRST(&idev->id_configs))
862                         if (!isa_assign_resources(child))
863                                 continue;
864
865                 device_probe_and_attach(child);
866
867                 if (TAILQ_FIRST(&idev->id_configs)) {
868                         /*
869                          * Claim any unallocated resources to keep other
870                          * devices from using them.
871                          */
872                         SLIST_FOREACH(rle, rl, link) {
873                                 if (!rle->res) {
874                                         int rid = rle->rid;
875                                         resource_list_alloc(rl, dev, child,
876                                                             rle->type,
877                                                             &rid,
878                                                             0, ~0, 1,
879                                                             0 /* !RF_ACTIVE */);
880                                 }
881                         }
882                 }
883         }
884
885         free(children, M_TEMP);
886 }
887
888 static int
889 isa_set_resource(device_t dev, device_t child, int type, int rid,
890                  u_long start, u_long count)
891 {
892         struct isa_device* idev = DEVTOISA(child);
893         struct resource_list *rl = &idev->id_resources;
894
895         if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY
896             && type != SYS_RES_IRQ && type != SYS_RES_DRQ)
897                 return EINVAL;
898         if (rid < 0)
899                 return EINVAL;
900         if (type == SYS_RES_IOPORT && rid >= ISA_NPORT)
901                 return EINVAL;
902         if (type == SYS_RES_MEMORY && rid >= ISA_NMEM)
903                 return EINVAL;
904         if (type == SYS_RES_IRQ && rid >= ISA_NIRQ)
905                 return EINVAL;
906         if (type == SYS_RES_DRQ && rid >= ISA_NDRQ)
907                 return EINVAL;
908
909         resource_list_add(rl, type, rid, start, start + count - 1, count);
910
911         return 0;
912 }
913
914 static int
915 isa_get_resource(device_t dev, device_t child, int type, int rid,
916                  u_long *startp, u_long *countp)
917 {
918         struct isa_device* idev = DEVTOISA(child);
919         struct resource_list *rl = &idev->id_resources;
920         struct resource_list_entry *rle;
921
922         rle = resource_list_find(rl, type, rid);
923         if (!rle)
924                 return ENOENT;
925         
926         if (startp)
927                 *startp = rle->start;
928         if (countp)
929                 *countp = rle->count;
930
931         return 0;
932 }
933
934 static void
935 isa_delete_resource(device_t dev, device_t child, int type, int rid)
936 {
937         struct isa_device* idev = DEVTOISA(child);
938         struct resource_list *rl = &idev->id_resources;
939         resource_list_delete(rl, type, rid);
940 }
941
942 static int
943 isa_add_config(device_t dev, device_t child,
944                int priority, struct isa_config *config)
945 {
946         struct isa_device* idev = DEVTOISA(child);
947         struct isa_config_entry *newice, *ice;
948
949         newice = malloc(sizeof *ice, M_DEVBUF, M_NOWAIT);
950         if (!newice)
951                 return ENOMEM;
952
953         newice->ice_priority = priority;
954         newice->ice_config = *config;
955         
956         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
957                 if (ice->ice_priority > priority)
958                         break;
959         }
960         if (ice)
961                 TAILQ_INSERT_BEFORE(ice, newice, ice_link);
962         else
963                 TAILQ_INSERT_TAIL(&idev->id_configs, newice, ice_link);
964
965         return 0;
966 }
967
968 static void
969 isa_set_config_callback(device_t dev, device_t child,
970                         isa_config_cb *fn, void *arg)
971 {
972         struct isa_device* idev = DEVTOISA(child);
973
974         idev->id_config_cb = fn;
975         idev->id_config_arg = arg;
976 }
977
978 static int
979 isa_pnp_probe(device_t dev, device_t child, struct isa_pnp_id *ids)
980 {
981         struct isa_device* idev = DEVTOISA(child);
982
983         if (!idev->id_vendorid)
984                 return ENOENT;
985
986         while (ids->ip_id) {
987                 /*
988                  * Really ought to support >1 compat id per device.
989                  */
990                 if (idev->id_logicalid == ids->ip_id
991                     || idev->id_compatid == ids->ip_id) {
992                         if (ids->ip_desc)
993                                 device_set_desc(child, ids->ip_desc);
994                         return 0;
995                 }
996                 ids++;
997         }
998
999         return ENXIO;
1000 }
1001
1002 static device_method_t isa_methods[] = {
1003         /* Device interface */
1004         DEVMETHOD(device_probe,         isa_probe),
1005         DEVMETHOD(device_attach,        isa_attach),
1006         DEVMETHOD(device_detach,        bus_generic_detach),
1007         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1008         DEVMETHOD(device_suspend,       bus_generic_suspend),
1009         DEVMETHOD(device_resume,        bus_generic_resume),
1010
1011         /* Bus interface */
1012         DEVMETHOD(bus_add_child,        isa_add_child),
1013         DEVMETHOD(bus_print_child,      isa_print_child),
1014         DEVMETHOD(bus_probe_nomatch,    isa_probe_nomatch),     
1015         DEVMETHOD(bus_read_ivar,        isa_read_ivar),
1016         DEVMETHOD(bus_write_ivar,       isa_write_ivar),
1017         DEVMETHOD(bus_child_detached,   isa_child_detached),
1018         DEVMETHOD(bus_driver_added,     isa_driver_added),
1019         DEVMETHOD(bus_alloc_resource,   isa_alloc_resource),
1020         DEVMETHOD(bus_release_resource, isa_release_resource),
1021         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
1022         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
1023         DEVMETHOD(bus_setup_intr,       isa_setup_intr),
1024         DEVMETHOD(bus_teardown_intr,    isa_teardown_intr),
1025         DEVMETHOD(bus_set_resource,     isa_set_resource),
1026         DEVMETHOD(bus_get_resource,     isa_get_resource),
1027         DEVMETHOD(bus_delete_resource,  isa_delete_resource),
1028
1029         /* ISA interface */
1030         DEVMETHOD(isa_add_config,       isa_add_config),
1031         DEVMETHOD(isa_set_config_callback, isa_set_config_callback),
1032         DEVMETHOD(isa_pnp_probe,        isa_pnp_probe),
1033
1034         { 0, 0 }
1035 };
1036
1037 static driver_t isa_driver = {
1038         "isa",
1039         isa_methods,
1040         1,                      /* no softc */
1041 };
1042
1043 /*
1044  * ISA can be attached to a PCI-ISA bridge or directly to the nexus.
1045  */
1046 DRIVER_MODULE(isa, isab, isa_driver, isa_devclass, 0, 0);
1047 #ifdef __i386__
1048 DRIVER_MODULE(isa, nexus, isa_driver, isa_devclass, 0, 0);
1049 #endif
1050