Initial import from FreeBSD RELENG_4:
[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 <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 static int      isa_print_child         __P((device_t, device_t));
80
81 MALLOC_DEFINE(M_ISADEV, "isadev", "ISA device");
82
83 static devclass_t isa_devclass;
84 static int isa_running;
85
86 /*
87  * At 'probe' time, we add all the devices which we know about to the
88  * bus.  The generic attach routine will probe and attach them if they
89  * are alive.
90  */
91 static int
92 isa_probe(device_t dev)
93 {
94         device_set_desc(dev, "ISA bus");
95         isa_init();             /* Allow machdep code to initialise */
96         return 0;
97 }
98
99 extern device_t isa_bus_device;
100
101 static int
102 isa_attach(device_t dev)
103 {
104         /*
105          * Arrange for isa_probe_children(dev) to be called later. XXX
106          */
107         isa_bus_device = dev;
108         return 0;
109 }
110
111 /*
112  * Find a working set of memory regions for a child using the ranges
113  * in *config  and return the regions in *result. Returns non-zero if
114  * a set of ranges was found.
115  */
116 static int
117 isa_find_memory(device_t child,
118                 struct isa_config *config,
119                 struct isa_config *result)
120 {
121         int success, i;
122         struct resource *res[ISA_NMEM];
123
124         /*
125          * First clear out any existing resource definitions.
126          */
127         for (i = 0; i < ISA_NMEM; i++) {
128                 bus_delete_resource(child, SYS_RES_MEMORY, i);
129                 res[i] = NULL;
130         }
131
132         success = 1;
133         result->ic_nmem = config->ic_nmem;
134         for (i = 0; i < config->ic_nmem; i++) {
135                 u_int32_t start, end, size, align;
136                 for (start = config->ic_mem[i].ir_start,
137                              end = config->ic_mem[i].ir_end,
138                              size = config->ic_mem[i].ir_size,
139                              align = config->ic_mem[i].ir_align;
140                      start + size - 1 <= end;
141                      start += align) {
142                         bus_set_resource(child, SYS_RES_MEMORY, i,
143                                          start, size);
144                         res[i] = bus_alloc_resource(child,
145                                                     SYS_RES_MEMORY, &i,
146                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
147                         if (res[i]) {
148                                 result->ic_mem[i].ir_start = start;
149                                 result->ic_mem[i].ir_end = start + size - 1;
150                                 result->ic_mem[i].ir_size = size;
151                                 result->ic_mem[i].ir_align = align;
152                                 break;
153                         }
154                 }
155
156                 /*
157                  * If we didn't find a place for memory range i, then 
158                  * give up now.
159                  */
160                 if (!res[i]) {
161                         success = 0;
162                         break;
163                 }
164         }
165
166         for (i = 0; i < ISA_NMEM; i++) {
167                 if (res[i])
168                         bus_release_resource(child, SYS_RES_MEMORY,
169                                              i, res[i]);
170         }
171
172         return success;
173 }
174
175 /*
176  * Find a working set of port regions for a child using the ranges
177  * in *config  and return the regions in *result. Returns non-zero if
178  * a set of ranges was found.
179  */
180 static int
181 isa_find_port(device_t child,
182               struct isa_config *config,
183               struct isa_config *result)
184 {
185         int success, i;
186         struct resource *res[ISA_NPORT];
187
188         /*
189          * First clear out any existing resource definitions.
190          */
191         for (i = 0; i < ISA_NPORT; i++) {
192                 bus_delete_resource(child, SYS_RES_IOPORT, i);
193                 res[i] = NULL;
194         }
195
196         success = 1;
197         result->ic_nport = config->ic_nport;
198         for (i = 0; i < config->ic_nport; i++) {
199                 u_int32_t start, end, size, align;
200                 for (start = config->ic_port[i].ir_start,
201                              end = config->ic_port[i].ir_end,
202                              size = config->ic_port[i].ir_size,
203                              align = config->ic_port[i].ir_align;
204                      start + size - 1 <= end;
205                      start += align) {
206                         bus_set_resource(child, SYS_RES_IOPORT, i,
207                                          start, size);
208                         res[i] = bus_alloc_resource(child,
209                                                     SYS_RES_IOPORT, &i,
210                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
211                         if (res[i]) {
212                                 result->ic_port[i].ir_start = start;
213                                 result->ic_port[i].ir_end = start + size - 1;
214                                 result->ic_port[i].ir_size = size;
215                                 result->ic_port[i].ir_align = align;
216                                 break;
217                         }
218                 }
219
220                 /*
221                  * If we didn't find a place for port range i, then 
222                  * give up now.
223                  */
224                 if (!res[i]) {
225                         success = 0;
226                         break;
227                 }
228         }
229
230         for (i = 0; i < ISA_NPORT; i++) {
231                 if (res[i])
232                         bus_release_resource(child, SYS_RES_IOPORT,
233                                              i, res[i]);
234         }
235
236         return success;
237 }
238
239 /*
240  * Return the index of the first bit in the mask (or -1 if mask is empty.
241  */
242 static int
243 find_first_bit(u_int32_t mask)
244 {
245         return ffs(mask) - 1;
246 }
247
248 /*
249  * Return the index of the next bit in the mask, or -1 if there are no more.
250  */
251 static int
252 find_next_bit(u_int32_t mask, int bit)
253 {
254         bit++;
255         while (bit < 32 && !(mask & (1 << bit)))
256                 bit++;
257         if (bit != 32)
258                 return bit;
259         return -1;
260 }
261
262 /*
263  * Find a working set of irqs for a child using the masks in *config
264  * and return the regions in *result. Returns non-zero if a set of
265  * irqs was found.
266  */
267 static int
268 isa_find_irq(device_t child,
269              struct isa_config *config,
270              struct isa_config *result)
271 {
272         int success, i;
273         struct resource *res[ISA_NIRQ];
274
275         /*
276          * First clear out any existing resource definitions.
277          */
278         for (i = 0; i < ISA_NIRQ; i++) {
279                 bus_delete_resource(child, SYS_RES_IRQ, i);
280                 res[i] = NULL;
281         }
282
283         success = 1;
284         result->ic_nirq = config->ic_nirq;
285         for (i = 0; i < config->ic_nirq; i++) {
286                 u_int32_t mask = config->ic_irqmask[i];
287                 int irq;
288                 for (irq = find_first_bit(mask);
289                      irq != -1;
290                      irq = find_next_bit(mask, irq)) {
291                         bus_set_resource(child, SYS_RES_IRQ, i,
292                                          irq, 1);
293                         res[i] = bus_alloc_resource(child,
294                                                     SYS_RES_IRQ, &i,
295                                                     0, ~0, 1, 0 /* !RF_ACTIVE */ );
296                         if (res[i]) {
297                                 result->ic_irqmask[i] = (1 << irq);
298                                 break;
299                         }
300                 }
301
302                 /*
303                  * If we didn't find a place for irq range i, then 
304                  * give up now.
305                  */
306                 if (!res[i]) {
307                         success = 0;
308                         break;
309                 }
310         }
311
312         for (i = 0; i < ISA_NIRQ; i++) {
313                 if (res[i])
314                         bus_release_resource(child, SYS_RES_IRQ,
315                                              i, res[i]);
316         }
317
318         return success;
319 }
320
321 /*
322  * Find a working set of drqs for a child using the masks in *config
323  * and return the regions in *result. Returns non-zero if a set of
324  * drqs was found.
325  */
326 static int
327 isa_find_drq(device_t child,
328              struct isa_config *config,
329              struct isa_config *result)
330 {
331         int success, i;
332         struct resource *res[ISA_NDRQ];
333
334         /*
335          * First clear out any existing resource definitions.
336          */
337         for (i = 0; i < ISA_NDRQ; i++) {
338                 bus_delete_resource(child, SYS_RES_DRQ, i);
339                 res[i] = NULL;
340         }
341
342         success = 1;
343         result->ic_ndrq = config->ic_ndrq;
344         for (i = 0; i < config->ic_ndrq; i++) {
345                 u_int32_t mask = config->ic_drqmask[i];
346                 int drq;
347                 for (drq = find_first_bit(mask);
348                      drq != -1;
349                      drq = find_next_bit(mask, drq)) {
350                         bus_set_resource(child, SYS_RES_DRQ, i,
351                                          drq, 1);
352                         res[i] = bus_alloc_resource(child,
353                                                     SYS_RES_DRQ, &i,
354                                                     0, ~0, 1, 0 /* !RF_ACTIVE */);
355                         if (res[i]) {
356                                 result->ic_drqmask[i] = (1 << drq);
357                                 break;
358                         }
359                 }
360
361                 /*
362                  * If we didn't find a place for drq range i, then 
363                  * give up now.
364                  */
365                 if (!res[i]) {
366                         success = 0;
367                         break;
368                 }
369         }
370
371         for (i = 0; i < ISA_NDRQ; i++) {
372                 if (res[i])
373                         bus_release_resource(child, SYS_RES_DRQ,
374                                              i, res[i]);
375         }
376
377         return success;
378 }
379
380 /*
381  * Attempt to find a working set of resources for a device. Return
382  * non-zero if a working configuration is found.
383  */
384 static int
385 isa_assign_resources(device_t child)
386 {
387         struct isa_device *idev = DEVTOISA(child);
388         struct isa_config_entry *ice;
389         struct isa_config config;
390
391         bzero(&config, sizeof config);
392         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
393                 if (!isa_find_memory(child, &ice->ice_config, &config))
394                         continue;
395                 if (!isa_find_port(child, &ice->ice_config, &config))
396                         continue;
397                 if (!isa_find_irq(child, &ice->ice_config, &config))
398                         continue;
399                 if (!isa_find_drq(child, &ice->ice_config, &config))
400                         continue;
401
402                 /*
403                  * A working configuration was found enable the device 
404                  * with this configuration.
405                  */
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         printf(" can't assign resources\n");
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          */
440         bus_generic_probe(dev);
441
442         if (device_get_children(dev, &children, &nchildren))
443                 return;
444
445         /*
446          * First disable all pnp devices so that they don't get
447          * matched by legacy probes.
448          */
449         if (bootverbose)
450                 printf("isa_probe_children: disabling PnP devices\n");
451         for (i = 0; i < nchildren; i++) {
452                 device_t child = children[i];
453                 struct isa_device *idev = DEVTOISA(child);
454                 struct isa_config config;
455
456                 bzero(&config, sizeof config);
457                 if (idev->id_config_cb)
458                         idev->id_config_cb(idev->id_config_arg, &config, 0);
459         }
460
461         /*
462          * Next probe all non-pnp devices so that they claim their
463          * resources first.
464          */
465         if (bootverbose)
466                 printf("isa_probe_children: probing non-PnP devices\n");
467         for (i = 0; i < nchildren; i++) {
468                 device_t child = children[i];
469                 struct isa_device *idev = DEVTOISA(child);
470
471                 if (TAILQ_FIRST(&idev->id_configs))
472                         continue;
473
474                 device_probe_and_attach(child);
475         }
476
477         /*
478          * Finally assign resource to pnp devices and probe them.
479          */
480         if (bootverbose)
481                 printf("isa_probe_children: probing PnP devices\n");
482         for (i = 0; i < nchildren; i++) {
483                 device_t child = children[i];
484                 struct isa_device* idev = DEVTOISA(child);
485
486                 if (!TAILQ_FIRST(&idev->id_configs))
487                         continue;
488
489                 if (isa_assign_resources(child)) {
490                         struct resource_list *rl = &idev->id_resources;
491                         struct resource_list_entry *rle;
492
493                         device_probe_and_attach(child);
494
495                         /*
496                          * Claim any unallocated resources to keep other
497                          * devices from using them.
498                          */
499                         SLIST_FOREACH(rle, rl, link) {
500                                 if (!rle->res) {
501                                         int rid = rle->rid;
502                                         resource_list_alloc(rl, dev, child,
503                                                             rle->type,
504                                                             &rid,
505                                                             0, ~0, 1,
506                                                             0 /* !RF_ACTIVE */);
507                                 }
508                         }
509                 }
510         }
511
512         free(children, M_TEMP);
513
514         isa_running = 1;
515 }
516
517 /*
518  * Add a new child with default ivars.
519  */
520 static device_t
521 isa_add_child(device_t dev, int order, const char *name, int unit)
522 {
523         device_t child;
524         struct  isa_device *idev;
525
526         idev = malloc(sizeof(struct isa_device), M_ISADEV, M_NOWAIT);
527         if (!idev)
528                 return 0;
529         bzero(idev, sizeof *idev);
530
531         resource_list_init(&idev->id_resources);
532         TAILQ_INIT(&idev->id_configs);
533
534         child = device_add_child_ordered(dev, order, name, unit);
535         device_set_ivars(child, idev);
536
537         return child;
538 }
539
540 static int
541 isa_print_resources(struct resource_list *rl, const char *name, int type,
542                     int count, const char *format)
543 {
544         struct resource_list_entry *rle;
545         int printed;
546         int i, retval = 0;;
547
548         printed = 0;
549         for (i = 0; i < count; i++) {
550                 rle = resource_list_find(rl, type, i);
551                 if (rle) {
552                         if (printed == 0)
553                                 retval += printf(" %s ", name);
554                         else if (printed > 0)
555                                 retval += printf(",");
556                         printed++;
557                         retval += printf(format, rle->start);
558                         if (rle->count > 1) {
559                                 retval += printf("-");
560                                 retval += printf(format,
561                                                  rle->start + rle->count - 1);
562                         }
563                 } else if (i > 3) {
564                         /* check the first few regardless */
565                         break;
566                 }
567         }
568         return retval;
569 }
570
571 static int
572 isa_print_all_resources(device_t dev)
573 {
574         struct  isa_device *idev = DEVTOISA(dev);
575         struct resource_list *rl = &idev->id_resources;
576         int retval = 0;
577
578         if (SLIST_FIRST(rl) || device_get_flags(dev))
579                 retval += printf(" at");
580         
581         retval += isa_print_resources(rl, "port", SYS_RES_IOPORT,
582                                       ISA_NPORT, "%#lx");
583         retval += isa_print_resources(rl, "iomem", SYS_RES_MEMORY,
584                                       ISA_NMEM, "%#lx");
585         retval += isa_print_resources(rl, "irq", SYS_RES_IRQ,
586                                       ISA_NIRQ, "%ld");
587         retval += isa_print_resources(rl, "drq", SYS_RES_DRQ,
588                                       ISA_NDRQ, "%ld");
589         if (device_get_flags(dev))
590                 retval += printf(" flags %#x", device_get_flags(dev));
591
592         return retval;
593 }
594
595 static int
596 isa_print_child(device_t bus, device_t dev)
597 {
598         int retval = 0;
599
600         retval += bus_print_child_header(bus, dev);
601         retval += isa_print_all_resources(dev);
602         retval += bus_print_child_footer(bus, dev);
603
604         return (retval);
605 }
606
607 static void
608 isa_probe_nomatch(device_t dev, device_t child)
609 {
610         if (bootverbose) {
611                 bus_print_child_header(dev, child);
612                 printf(" failed to probe");
613                 isa_print_all_resources(child);
614                 bus_print_child_footer(dev, child);
615         }
616                                       
617         return;
618 }
619
620 static int
621 isa_read_ivar(device_t bus, device_t dev, int index, uintptr_t * result)
622 {
623         struct isa_device* idev = DEVTOISA(dev);
624         struct resource_list *rl = &idev->id_resources;
625         struct resource_list_entry *rle;
626
627         switch (index) {
628         case ISA_IVAR_PORT_0:
629                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
630                 if (rle)
631                         *result = rle->start;
632                 else
633                         *result = -1;
634                 break;
635
636         case ISA_IVAR_PORT_1:
637                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
638                 if (rle)
639                         *result = rle->start;
640                 else
641                         *result = -1;
642                 break;
643
644         case ISA_IVAR_PORTSIZE_0:
645                 rle = resource_list_find(rl, SYS_RES_IOPORT, 0);
646                 if (rle)
647                         *result = rle->count;
648                 else
649                         *result = 0;
650                 break;
651
652         case ISA_IVAR_PORTSIZE_1:
653                 rle = resource_list_find(rl, SYS_RES_IOPORT, 1);
654                 if (rle)
655                         *result = rle->count;
656                 else
657                         *result = 0;
658                 break;
659
660         case ISA_IVAR_MADDR_0:
661                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
662                 if (rle)
663                         *result = rle->start;
664                 else
665                         *result = -1;
666                 break;
667
668         case ISA_IVAR_MADDR_1:
669                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
670                 if (rle)
671                         *result = rle->start;
672                 else
673                         *result = -1;
674                 break;
675
676         case ISA_IVAR_MSIZE_0:
677                 rle = resource_list_find(rl, SYS_RES_MEMORY, 0);
678                 if (rle)
679                         *result = rle->count;
680                 else
681                         *result = 0;
682                 break;
683
684         case ISA_IVAR_MSIZE_1:
685                 rle = resource_list_find(rl, SYS_RES_MEMORY, 1);
686                 if (rle)
687                         *result = rle->count;
688                 else
689                         *result = 0;
690                 break;
691
692         case ISA_IVAR_IRQ_0:
693                 rle = resource_list_find(rl, SYS_RES_IRQ, 0);
694                 if (rle)
695                         *result = rle->start;
696                 else
697                         *result = -1;
698                 break;
699
700         case ISA_IVAR_IRQ_1:
701                 rle = resource_list_find(rl, SYS_RES_IRQ, 1);
702                 if (rle)
703                         *result = rle->start;
704                 else
705                         *result = -1;
706                 break;
707
708         case ISA_IVAR_DRQ_0:
709                 rle = resource_list_find(rl, SYS_RES_DRQ, 0);
710                 if (rle)
711                         *result = rle->start;
712                 else
713                         *result = -1;
714                 break;
715
716         case ISA_IVAR_DRQ_1:
717                 rle = resource_list_find(rl, SYS_RES_DRQ, 1);
718                 if (rle)
719                         *result = rle->start;
720                 else
721                         *result = -1;
722                 break;
723
724         case ISA_IVAR_VENDORID:
725                 *result = idev->id_vendorid;
726                 break;
727
728         case ISA_IVAR_SERIAL:
729                 *result = idev->id_serial;
730                 break;
731
732         case ISA_IVAR_LOGICALID:
733                 *result = idev->id_logicalid;
734                 break;
735
736         case ISA_IVAR_COMPATID:
737                 *result = idev->id_compatid;
738                 break;
739
740         default:
741                 return ENOENT;
742         }
743
744         return 0;
745 }
746
747 static int
748 isa_write_ivar(device_t bus, device_t dev,
749                int index, uintptr_t value)
750 {
751         struct isa_device* idev = DEVTOISA(dev);
752
753         switch (index) {
754         case ISA_IVAR_PORT_0:
755         case ISA_IVAR_PORT_1:
756         case ISA_IVAR_PORTSIZE_0:
757         case ISA_IVAR_PORTSIZE_1:
758         case ISA_IVAR_MADDR_0:
759         case ISA_IVAR_MADDR_1:
760         case ISA_IVAR_MSIZE_0:
761         case ISA_IVAR_MSIZE_1:
762         case ISA_IVAR_IRQ_0:
763         case ISA_IVAR_IRQ_1:
764         case ISA_IVAR_DRQ_0:
765         case ISA_IVAR_DRQ_1:
766                 return EINVAL;
767
768         case ISA_IVAR_VENDORID:
769                 idev->id_vendorid = value;
770                 break;
771
772         case ISA_IVAR_SERIAL:
773                 idev->id_serial = value;
774                 break;
775
776         case ISA_IVAR_LOGICALID:
777                 idev->id_logicalid = value;
778                 break;
779
780         case ISA_IVAR_COMPATID:
781                 idev->id_compatid = value;
782                 break;
783
784         default:
785                 return (ENOENT);
786         }
787
788         return (0);
789 }
790
791 /*
792  * Free any resources which the driver missed or which we were holding for
793  * it (see isa_probe_children).
794  */
795 static void
796 isa_child_detached(device_t dev, device_t child)
797 {
798         struct isa_device* idev = DEVTOISA(child);
799         struct resource_list *rl = &idev->id_resources;
800         struct resource_list_entry *rle;
801
802         if (TAILQ_FIRST(&idev->id_configs)) {
803                 /*
804                  * Claim any unallocated resources to keep other
805                  * devices from using them.
806                  */
807                 SLIST_FOREACH(rle, rl, link) {
808                         if (!rle->res) {
809                                 int rid = rle->rid;
810                                 resource_list_alloc(rl, dev, child,
811                                                     rle->type,
812                                                     &rid, 0, ~0, 1, 0);
813                         }
814                 }
815         }
816 }
817
818 static void
819 isa_driver_added(device_t dev, driver_t *driver)
820 {
821         device_t *children;
822         int nchildren, i;
823
824         /*
825          * Don't do anything if drivers are dynamically
826          * added during autoconfiguration (cf. ymf724).
827          * since that would end up calling identify
828          * twice.
829          */
830         if (!isa_running)
831                 return;
832
833         DEVICE_IDENTIFY(driver, dev);
834         if (device_get_children(dev, &children, &nchildren))
835                 return;
836
837         for (i = 0; i < nchildren; i++) {
838                 device_t child = children[i];
839                 struct isa_device *idev = DEVTOISA(child);
840                 struct resource_list *rl = &idev->id_resources;
841                 struct resource_list_entry *rle;
842
843                 if (device_get_state(child) != DS_NOTPRESENT)
844                         continue;
845                 if (!device_is_enabled(child))
846                         continue;
847
848                 /*
849                  * Free resources which we were holding on behalf of
850                  * the device.
851                  */
852                 SLIST_FOREACH(rle, &idev->id_resources, link) {
853                         if (rle->res)
854                                 resource_list_release(rl, dev, child,
855                                                       rle->type,
856                                                       rle->rid,
857                                                       rle->res);
858                 }
859
860                 if (TAILQ_FIRST(&idev->id_configs))
861                         if (!isa_assign_resources(child))
862                                 continue;
863
864                 device_probe_and_attach(child);
865
866                 if (TAILQ_FIRST(&idev->id_configs)) {
867                         /*
868                          * Claim any unallocated resources to keep other
869                          * devices from using them.
870                          */
871                         SLIST_FOREACH(rle, rl, link) {
872                                 if (!rle->res) {
873                                         int rid = rle->rid;
874                                         resource_list_alloc(rl, dev, child,
875                                                             rle->type,
876                                                             &rid,
877                                                             0, ~0, 1,
878                                                             0 /* !RF_ACTIVE */);
879                                 }
880                         }
881                 }
882         }
883
884         free(children, M_TEMP);
885 }
886
887 static int
888 isa_set_resource(device_t dev, device_t child, int type, int rid,
889                  u_long start, u_long count)
890 {
891         struct isa_device* idev = DEVTOISA(child);
892         struct resource_list *rl = &idev->id_resources;
893
894         if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY
895             && type != SYS_RES_IRQ && type != SYS_RES_DRQ)
896                 return EINVAL;
897         if (rid < 0)
898                 return EINVAL;
899         if (type == SYS_RES_IOPORT && rid >= ISA_NPORT)
900                 return EINVAL;
901         if (type == SYS_RES_MEMORY && rid >= ISA_NMEM)
902                 return EINVAL;
903         if (type == SYS_RES_IRQ && rid >= ISA_NIRQ)
904                 return EINVAL;
905         if (type == SYS_RES_DRQ && rid >= ISA_NDRQ)
906                 return EINVAL;
907
908         resource_list_add(rl, type, rid, start, start + count - 1, count);
909
910         return 0;
911 }
912
913 static int
914 isa_get_resource(device_t dev, device_t child, int type, int rid,
915                  u_long *startp, u_long *countp)
916 {
917         struct isa_device* idev = DEVTOISA(child);
918         struct resource_list *rl = &idev->id_resources;
919         struct resource_list_entry *rle;
920
921         rle = resource_list_find(rl, type, rid);
922         if (!rle)
923                 return ENOENT;
924         
925         if (startp)
926                 *startp = rle->start;
927         if (countp)
928                 *countp = rle->count;
929
930         return 0;
931 }
932
933 static void
934 isa_delete_resource(device_t dev, device_t child, int type, int rid)
935 {
936         struct isa_device* idev = DEVTOISA(child);
937         struct resource_list *rl = &idev->id_resources;
938         resource_list_delete(rl, type, rid);
939 }
940
941 static int
942 isa_add_config(device_t dev, device_t child,
943                int priority, struct isa_config *config)
944 {
945         struct isa_device* idev = DEVTOISA(child);
946         struct isa_config_entry *newice, *ice;
947
948         newice = malloc(sizeof *ice, M_DEVBUF, M_NOWAIT);
949         if (!newice)
950                 return ENOMEM;
951
952         newice->ice_priority = priority;
953         newice->ice_config = *config;
954         
955         TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
956                 if (ice->ice_priority > priority)
957                         break;
958         }
959         if (ice)
960                 TAILQ_INSERT_BEFORE(ice, newice, ice_link);
961         else
962                 TAILQ_INSERT_TAIL(&idev->id_configs, newice, ice_link);
963
964         return 0;
965 }
966
967 static void
968 isa_set_config_callback(device_t dev, device_t child,
969                         isa_config_cb *fn, void *arg)
970 {
971         struct isa_device* idev = DEVTOISA(child);
972
973         idev->id_config_cb = fn;
974         idev->id_config_arg = arg;
975 }
976
977 static int
978 isa_pnp_probe(device_t dev, device_t child, struct isa_pnp_id *ids)
979 {
980         struct isa_device* idev = DEVTOISA(child);
981
982         if (!idev->id_vendorid)
983                 return ENOENT;
984
985         while (ids->ip_id) {
986                 /*
987                  * Really ought to support >1 compat id per device.
988                  */
989                 if (idev->id_logicalid == ids->ip_id
990                     || idev->id_compatid == ids->ip_id) {
991                         if (ids->ip_desc)
992                                 device_set_desc(child, ids->ip_desc);
993                         return 0;
994                 }
995                 ids++;
996         }
997
998         return ENXIO;
999 }
1000
1001 static device_method_t isa_methods[] = {
1002         /* Device interface */
1003         DEVMETHOD(device_probe,         isa_probe),
1004         DEVMETHOD(device_attach,        isa_attach),
1005         DEVMETHOD(device_detach,        bus_generic_detach),
1006         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
1007         DEVMETHOD(device_suspend,       bus_generic_suspend),
1008         DEVMETHOD(device_resume,        bus_generic_resume),
1009
1010         /* Bus interface */
1011         DEVMETHOD(bus_add_child,        isa_add_child),
1012         DEVMETHOD(bus_print_child,      isa_print_child),
1013         DEVMETHOD(bus_probe_nomatch,    isa_probe_nomatch),     
1014         DEVMETHOD(bus_read_ivar,        isa_read_ivar),
1015         DEVMETHOD(bus_write_ivar,       isa_write_ivar),
1016         DEVMETHOD(bus_child_detached,   isa_child_detached),
1017         DEVMETHOD(bus_driver_added,     isa_driver_added),
1018         DEVMETHOD(bus_alloc_resource,   isa_alloc_resource),
1019         DEVMETHOD(bus_release_resource, isa_release_resource),
1020         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
1021         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
1022         DEVMETHOD(bus_setup_intr,       isa_setup_intr),
1023         DEVMETHOD(bus_teardown_intr,    isa_teardown_intr),
1024         DEVMETHOD(bus_set_resource,     isa_set_resource),
1025         DEVMETHOD(bus_get_resource,     isa_get_resource),
1026         DEVMETHOD(bus_delete_resource,  isa_delete_resource),
1027
1028         /* ISA interface */
1029         DEVMETHOD(isa_add_config,       isa_add_config),
1030         DEVMETHOD(isa_set_config_callback, isa_set_config_callback),
1031         DEVMETHOD(isa_pnp_probe,        isa_pnp_probe),
1032
1033         { 0, 0 }
1034 };
1035
1036 static driver_t isa_driver = {
1037         "isa",
1038         isa_methods,
1039         1,                      /* no softc */
1040 };
1041
1042 /*
1043  * ISA can be attached to a PCI-ISA bridge or directly to the nexus.
1044  */
1045 DRIVER_MODULE(isa, isab, isa_driver, isa_devclass, 0, 0);
1046 #ifdef __i386__
1047 DRIVER_MODULE(isa, nexus, isa_driver, isa_devclass, 0, 0);
1048 #endif
1049