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1/*
2 * Macintosh Nubus Interface Code
3 *
4 * Originally by Alan Cox
5 *
6 * Mostly rewritten by David Huggins-Daines, C. Scott Ananian,
7 * and others.
8 */
9
10#include <linux/types.h>
11#include <linux/kernel.h>
12#include <linux/string.h>
13#include <linux/nubus.h>
14#include <linux/errno.h>
15#include <linux/init.h>
16#include <linux/delay.h>
17#include <linux/module.h>
18#include <linux/slab.h>
19#include <asm/setup.h>
20#include <asm/system.h>
21#include <asm/page.h>
22#include <asm/hwtest.h>
23#include <linux/proc_fs.h>
24#include <asm/mac_via.h>
25#include <asm/mac_oss.h>
26
27extern void via_nubus_init(void);
28extern void oss_nubus_init(void);
29
30/* Constants */
31
32/* This is, of course, the size in bytelanes, rather than the size in
33 actual bytes */
34#define FORMAT_BLOCK_SIZE 20
35#define ROM_DIR_OFFSET 0x24
36
37#define NUBUS_TEST_PATTERN 0x5A932BC7
38
39/* Define this if you like to live dangerously - it is known not to
40 work on pretty much every machine except the Quadra 630 and the LC
41 III. */
42#undef I_WANT_TO_PROBE_SLOT_ZERO
43
44/* This sometimes helps combat failure to boot */
45#undef TRY_TO_DODGE_WSOD
46
47/* Globals */
48
49struct nubus_dev* nubus_devices;
50struct nubus_board* nubus_boards;
51
52/* Meaning of "bytelanes":
53
54 The card ROM may appear on any or all bytes of each long word in
55 NuBus memory. The low 4 bits of the "map" value found in the
56 format block (at the top of the slot address space, as well as at
57 the top of the MacOS ROM) tells us which bytelanes, i.e. which byte
58 offsets within each longword, are valid. Thus:
59
60 A map of 0x0f, as found in the MacOS ROM, means that all bytelanes
61 are valid.
62
63 A map of 0xf0 means that no bytelanes are valid (We pray that we
64 will never encounter this, but stranger things have happened)
65
66 A map of 0xe1 means that only the MSB of each long word is actually
67 part of the card ROM. (We hope to never encounter NuBus on a
68 little-endian machine. Again, stranger things have happened)
69
70 A map of 0x78 means that only the LSB of each long word is valid.
71
72 Etcetera, etcetera. Hopefully this clears up some confusion over
73 what the following code actually does. */
74
75static inline int not_useful(void *p, int map)
76{
77 unsigned long pv=(unsigned long)p;
78 pv &= 3;
79 if(map & (1<<pv))
80 return 0;
81 return 1;
82}
83
84static unsigned long nubus_get_rom(unsigned char **ptr, int len, int map)
85{
86 /* This will hold the result */
87 unsigned long v = 0;
88 unsigned char *p = *ptr;
89
90 while(len)
91 {
92 v <<= 8;
93 while(not_useful(p,map))
94 p++;
95 v |= *p++;
96 len--;
97 }
98 *ptr = p;
99 return v;
100}
101
102static void nubus_rewind(unsigned char **ptr, int len, int map)
103{
104 unsigned char *p=*ptr;
105
106 /* Sanity check */
107 if(len > 65536)
108 printk(KERN_ERR "rewind of 0x%08x!\n", len);
109 while(len)
110 {
111 do
112 {
113 p--;
114 }
115 while(not_useful(p, map));
116 len--;
117 }
118 *ptr=p;
119}
120
121static void nubus_advance(unsigned char **ptr, int len, int map)
122{
123 unsigned char *p = *ptr;
124 if(len>65536)
125 printk(KERN_ERR "advance of 0x%08x!\n", len);
126 while(len)
127 {
128 while(not_useful(p,map))
129 p++;
130 p++;
131 len--;
132 }
133 *ptr = p;
134}
135
136static void nubus_move(unsigned char **ptr, int len, int map)
137{
138 if(len > 0)
139 nubus_advance(ptr, len, map);
140 else if(len < 0)
141 nubus_rewind(ptr, -len, map);
142}
143
144/* Now, functions to read the sResource tree */
145
146/* Each sResource entry consists of a 1-byte ID and a 3-byte data
147 field. If that data field contains an offset, then obviously we
148 have to expand it from a 24-bit signed number to a 32-bit signed
149 number. */
150
151static inline long nubus_expand32(long foo)
152{
153 if(foo & 0x00800000) /* 24bit negative */
154 foo |= 0xFF000000;
155 return foo;
156}
157
158static inline void *nubus_rom_addr(int slot)
159{
160 /*
161 * Returns the first byte after the card. We then walk
162 * backwards to get the lane register and the config
163 */
164 return (void *)(0xF1000000+(slot<<24));
165}
166
167static unsigned char *nubus_dirptr(const struct nubus_dirent *nd)
168{
169 unsigned char *p = nd->base;
170 /* Essentially, just step over the bytelanes using whatever
171 offset we might have found */
172 nubus_move(&p, nubus_expand32(nd->data), nd->mask);
173 /* And return the value */
174 return p;
175}
176
177/* These two are for pulling resource data blocks (i.e. stuff that's
178 pointed to with offsets) out of the card ROM. */
179
180void nubus_get_rsrc_mem(void *dest, const struct nubus_dirent* dirent,
181 int len)
182{
183 unsigned char *t = (unsigned char *)dest;
184 unsigned char *p = nubus_dirptr(dirent);
185 while(len)
186 {
187 *t++ = nubus_get_rom(&p, 1, dirent->mask);
188 len--;
189 }
190}
191EXPORT_SYMBOL(nubus_get_rsrc_mem);
192
193void nubus_get_rsrc_str(void *dest, const struct nubus_dirent* dirent,
194 int len)
195{
196 unsigned char *t=(unsigned char *)dest;
197 unsigned char *p = nubus_dirptr(dirent);
198 while(len)
199 {
200 *t = nubus_get_rom(&p, 1, dirent->mask);
201 if(!*t++)
202 break;
203 len--;
204 }
205}
206EXPORT_SYMBOL(nubus_get_rsrc_str);
207
208int nubus_get_root_dir(const struct nubus_board* board,
209 struct nubus_dir* dir)
210{
211 dir->ptr = dir->base = board->directory;
212 dir->done = 0;
213 dir->mask = board->lanes;
214 return 0;
215}
216EXPORT_SYMBOL(nubus_get_root_dir);
217
218/* This is a slyly renamed version of the above */
219int nubus_get_func_dir(const struct nubus_dev* dev,
220 struct nubus_dir* dir)
221{
222 dir->ptr = dir->base = dev->directory;
223 dir->done = 0;
224 dir->mask = dev->board->lanes;
225 return 0;
226}
227EXPORT_SYMBOL(nubus_get_func_dir);
228
229int nubus_get_board_dir(const struct nubus_board* board,
230 struct nubus_dir* dir)
231{
232 struct nubus_dirent ent;
233
234 dir->ptr = dir->base = board->directory;
235 dir->done = 0;
236 dir->mask = board->lanes;
237
238 /* Now dereference it (the first directory is always the board
239 directory) */
240 if (nubus_readdir(dir, &ent) == -1)
241 return -1;
242 if (nubus_get_subdir(&ent, dir) == -1)
243 return -1;
244 return 0;
245}
246EXPORT_SYMBOL(nubus_get_board_dir);
247
248int nubus_get_subdir(const struct nubus_dirent *ent,
249 struct nubus_dir *dir)
250{
251 dir->ptr = dir->base = nubus_dirptr(ent);
252 dir->done = 0;
253 dir->mask = ent->mask;
254 return 0;
255}
256EXPORT_SYMBOL(nubus_get_subdir);
257
258int nubus_readdir(struct nubus_dir *nd, struct nubus_dirent *ent)
259{
260 u32 resid;
261 if (nd->done)
262 return -1;
263
264 /* Do this first, otherwise nubus_rewind & co are off by 4 */
265 ent->base = nd->ptr;
266
267 /* This moves nd->ptr forward */
268 resid = nubus_get_rom(&nd->ptr, 4, nd->mask);
269
270 /* EOL marker, as per the Apple docs */
271 if((resid&0xff000000) == 0xff000000)
272 {
273 /* Mark it as done */
274 nd->done = 1;
275 return -1;
276 }
277
278 /* First byte is the resource ID */
279 ent->type = resid >> 24;
280 /* Low 3 bytes might contain data (or might not) */
281 ent->data = resid & 0xffffff;
282 ent->mask = nd->mask;
283 return 0;
284}
285EXPORT_SYMBOL(nubus_readdir);
286
287int nubus_rewinddir(struct nubus_dir* dir)
288{
289 dir->ptr = dir->base;
290 return 0;
291}
292EXPORT_SYMBOL(nubus_rewinddir);
293
294/* Driver interface functions, more or less like in pci.c */
295
296struct nubus_dev*
297nubus_find_device(unsigned short category,
298 unsigned short type,
299 unsigned short dr_hw,
300 unsigned short dr_sw,
301 const struct nubus_dev* from)
302{
303 struct nubus_dev* itor =
304 from ? from->next : nubus_devices;
305
306 while (itor) {
307 if (itor->category == category
308 && itor->type == type
309 && itor->dr_hw == dr_hw
310 && itor->dr_sw == dr_sw)
311 return itor;
312 itor = itor->next;
313 }
314 return NULL;
315}
316EXPORT_SYMBOL(nubus_find_device);
317
318struct nubus_dev*
319nubus_find_type(unsigned short category,
320 unsigned short type,
321 const struct nubus_dev* from)
322{
323 struct nubus_dev* itor =
324 from ? from->next : nubus_devices;
325
326 while (itor) {
327 if (itor->category == category
328 && itor->type == type)
329 return itor;
330 itor = itor->next;
331 }
332 return NULL;
333}
334EXPORT_SYMBOL(nubus_find_type);
335
336struct nubus_dev*
337nubus_find_slot(unsigned int slot,
338 const struct nubus_dev* from)
339{
340 struct nubus_dev* itor =
341 from ? from->next : nubus_devices;
342
343 while (itor) {
344 if (itor->board->slot == slot)
345 return itor;
346 itor = itor->next;
347 }
348 return NULL;
349}
350EXPORT_SYMBOL(nubus_find_slot);
351
352int
353nubus_find_rsrc(struct nubus_dir* dir, unsigned char rsrc_type,
354 struct nubus_dirent* ent)
355{
356 while (nubus_readdir(dir, ent) != -1) {
357 if (ent->type == rsrc_type)
358 return 0;
359 }
360 return -1;
361}
362EXPORT_SYMBOL(nubus_find_rsrc);
363
364/* Initialization functions - decide which slots contain stuff worth
365 looking at, and print out lots and lots of information from the
366 resource blocks. */
367
368/* FIXME: A lot of this stuff will eventually be useful after
369 initialization, for intelligently probing Ethernet and video chips,
370 among other things. The rest of it should go in the /proc code.
371 For now, we just use it to give verbose boot logs. */
372
373static int __init nubus_show_display_resource(struct nubus_dev* dev,
374 const struct nubus_dirent* ent)
375{
376 switch (ent->type) {
377 case NUBUS_RESID_GAMMADIR:
378 printk(KERN_INFO " gamma directory offset: 0x%06x\n", ent->data);
379 break;
380 case 0x0080 ... 0x0085:
381 printk(KERN_INFO " mode %02X info offset: 0x%06x\n",
382 ent->type, ent->data);
383 break;
384 default:
385 printk(KERN_INFO " unknown resource %02X, data 0x%06x\n",
386 ent->type, ent->data);
387 }
388 return 0;
389}
390
391static int __init nubus_show_network_resource(struct nubus_dev* dev,
392 const struct nubus_dirent* ent)
393{
394 switch (ent->type) {
395 case NUBUS_RESID_MAC_ADDRESS:
396 {
397 char addr[6];
398 int i;
399
400 nubus_get_rsrc_mem(addr, ent, 6);
401 printk(KERN_INFO " MAC address: ");
402 for (i = 0; i < 6; i++)
403 printk("%02x%s", addr[i] & 0xff,
404 i == 5 ? "" : ":");
405 printk("\n");
406 break;
407 }
408 default:
409 printk(KERN_INFO " unknown resource %02X, data 0x%06x\n",
410 ent->type, ent->data);
411 }
412 return 0;
413}
414
415static int __init nubus_show_cpu_resource(struct nubus_dev* dev,
416 const struct nubus_dirent* ent)
417{
418 switch (ent->type) {
419 case NUBUS_RESID_MEMINFO:
420 {
421 unsigned long meminfo[2];
422 nubus_get_rsrc_mem(&meminfo, ent, 8);
423 printk(KERN_INFO " memory: [ 0x%08lx 0x%08lx ]\n",
424 meminfo[0], meminfo[1]);
425 break;
426 }
427 case NUBUS_RESID_ROMINFO:
428 {
429 unsigned long rominfo[2];
430 nubus_get_rsrc_mem(&rominfo, ent, 8);
431 printk(KERN_INFO " ROM: [ 0x%08lx 0x%08lx ]\n",
432 rominfo[0], rominfo[1]);
433 break;
434 }
435 default:
436 printk(KERN_INFO " unknown resource %02X, data 0x%06x\n",
437 ent->type, ent->data);
438 }
439 return 0;
440}
441
442static int __init nubus_show_private_resource(struct nubus_dev* dev,
443 const struct nubus_dirent* ent)
444{
445 switch (dev->category) {
446 case NUBUS_CAT_DISPLAY:
447 nubus_show_display_resource(dev, ent);
448 break;
449 case NUBUS_CAT_NETWORK:
450 nubus_show_network_resource(dev, ent);
451 break;
452 case NUBUS_CAT_CPU:
453 nubus_show_cpu_resource(dev, ent);
454 break;
455 default:
456 printk(KERN_INFO " unknown resource %02X, data 0x%06x\n",
457 ent->type, ent->data);
458 }
459 return 0;
460}
461
462static struct nubus_dev* __init
463 nubus_get_functional_resource(struct nubus_board* board,
464 int slot,
465 const struct nubus_dirent* parent)
466{
467 struct nubus_dir dir;
468 struct nubus_dirent ent;
469 struct nubus_dev* dev;
470
471 printk(KERN_INFO " Function 0x%02x:\n", parent->type);
472 nubus_get_subdir(parent, &dir);
473
474 /* Apple seems to have botched the ROM on the IIx */
475 if (slot == 0 && (unsigned long)dir.base % 2)
476 dir.base += 1;
477
478 if (console_loglevel >= 10)
479 printk(KERN_DEBUG "nubus_get_functional_resource: parent is 0x%p, dir is 0x%p\n",
480 parent->base, dir.base);
481
482 /* Actually we should probably panic if this fails */
483 if ((dev = kzalloc(sizeof(*dev), GFP_ATOMIC)) == NULL)
484 return NULL;
485 dev->resid = parent->type;
486 dev->directory = dir.base;
487 dev->board = board;
488
489 while (nubus_readdir(&dir, &ent) != -1)
490 {
491 switch(ent.type)
492 {
493 case NUBUS_RESID_TYPE:
494 {
495 unsigned short nbtdata[4];
496 nubus_get_rsrc_mem(nbtdata, &ent, 8);
497 dev->category = nbtdata[0];
498 dev->type = nbtdata[1];
499 dev->dr_sw = nbtdata[2];
500 dev->dr_hw = nbtdata[3];
501 printk(KERN_INFO " type: [cat 0x%x type 0x%x hw 0x%x sw 0x%x]\n",
502 nbtdata[0], nbtdata[1], nbtdata[2], nbtdata[3]);
503 break;
504 }
505 case NUBUS_RESID_NAME:
506 {
507 nubus_get_rsrc_str(dev->name, &ent, 64);
508 printk(KERN_INFO " name: %s\n", dev->name);
509 break;
510 }
511 case NUBUS_RESID_DRVRDIR:
512 {
513 /* MacOS driver. If we were NetBSD we might
514 use this :-) */
515 struct nubus_dir drvr_dir;
516 struct nubus_dirent drvr_ent;
517 nubus_get_subdir(&ent, &drvr_dir);
518 nubus_readdir(&drvr_dir, &drvr_ent);
519 dev->driver = nubus_dirptr(&drvr_ent);
520 printk(KERN_INFO " driver at: 0x%p\n",
521 dev->driver);
522 break;
523 }
524 case NUBUS_RESID_MINOR_BASEOS:
525 /* We will need this in order to support
526 multiple framebuffers. It might be handy
527 for Ethernet as well */
528 nubus_get_rsrc_mem(&dev->iobase, &ent, 4);
529 printk(KERN_INFO " memory offset: 0x%08lx\n",
530 dev->iobase);
531 break;
532 case NUBUS_RESID_MINOR_LENGTH:
533 /* Ditto */
534 nubus_get_rsrc_mem(&dev->iosize, &ent, 4);
535 printk(KERN_INFO " memory length: 0x%08lx\n",
536 dev->iosize);
537 break;
538 case NUBUS_RESID_FLAGS:
539 dev->flags = ent.data;
540 printk(KERN_INFO " flags: 0x%06x\n", dev->flags);
541 break;
542 case NUBUS_RESID_HWDEVID:
543 dev->hwdevid = ent.data;
544 printk(KERN_INFO " hwdevid: 0x%06x\n", dev->hwdevid);
545 break;
546 default:
547 /* Local/Private resources have their own
548 function */
549 nubus_show_private_resource(dev, &ent);
550 }
551 }
552
553 return dev;
554}
555
556/* This is cool. */
557static int __init nubus_get_vidnames(struct nubus_board* board,
558 const struct nubus_dirent* parent)
559{
560 struct nubus_dir dir;
561 struct nubus_dirent ent;
562 /* FIXME: obviously we want to put this in a header file soon */
563 struct vidmode {
564 u32 size;
565 /* Don't know what this is yet */
566 u16 id;
567 /* Longest one I've seen so far is 26 characters */
568 char name[32];
569 };
570
571 printk(KERN_INFO " video modes supported:\n");
572 nubus_get_subdir(parent, &dir);
573 if (console_loglevel >= 10)
574 printk(KERN_DEBUG "nubus_get_vidnames: parent is 0x%p, dir is 0x%p\n",
575 parent->base, dir.base);
576
577 while(nubus_readdir(&dir, &ent) != -1)
578 {
579 struct vidmode mode;
580 u32 size;
581
582 /* First get the length */
583 nubus_get_rsrc_mem(&size, &ent, 4);
584
585 /* Now clobber the whole thing */
586 if (size > sizeof(mode) - 1)
587 size = sizeof(mode) - 1;
588 memset(&mode, 0, sizeof(mode));
589 nubus_get_rsrc_mem(&mode, &ent, size);
590 printk (KERN_INFO " %02X: (%02X) %s\n", ent.type,
591 mode.id, mode.name);
592 }
593 return 0;
594}
595
596/* This is *really* cool. */
597static int __init nubus_get_icon(struct nubus_board* board,
598 const struct nubus_dirent* ent)
599{
600 /* Should be 32x32 if my memory serves me correctly */
601 unsigned char icon[128];
602 int x, y;
603
604 nubus_get_rsrc_mem(&icon, ent, 128);
605 printk(KERN_INFO " icon:\n");
606
607 /* We should actually plot these somewhere in the framebuffer
608 init. This is just to demonstrate that they do, in fact,
609 exist */
610 for (y = 0; y < 32; y++) {
611 printk(KERN_INFO " ");
612 for (x = 0; x < 32; x++) {
613 if (icon[y*4 + x/8]
614 & (0x80 >> (x%8)))
615 printk("*");
616 else
617 printk(" ");
618 }
619 printk("\n");
620 }
621 return 0;
622}
623
624static int __init nubus_get_vendorinfo(struct nubus_board* board,
625 const struct nubus_dirent* parent)
626{
627 struct nubus_dir dir;
628 struct nubus_dirent ent;
629 static char* vendor_fields[6] = {"ID", "serial", "revision",
630 "part", "date", "unknown field"};
631
632 printk(KERN_INFO " vendor info:\n");
633 nubus_get_subdir(parent, &dir);
634 if (console_loglevel >= 10)
635 printk(KERN_DEBUG "nubus_get_vendorinfo: parent is 0x%p, dir is 0x%p\n",
636 parent->base, dir.base);
637
638 while(nubus_readdir(&dir, &ent) != -1)
639 {
640 char name[64];
641
642 /* These are all strings, we think */
643 nubus_get_rsrc_str(name, &ent, 64);
644 if (ent.type > 5)
645 ent.type = 5;
646 printk(KERN_INFO " %s: %s\n",
647 vendor_fields[ent.type-1], name);
648 }
649 return 0;
650}
651
652static int __init nubus_get_board_resource(struct nubus_board* board, int slot,
653 const struct nubus_dirent* parent)
654{
655 struct nubus_dir dir;
656 struct nubus_dirent ent;
657
658 nubus_get_subdir(parent, &dir);
659 if (console_loglevel >= 10)
660 printk(KERN_DEBUG "nubus_get_board_resource: parent is 0x%p, dir is 0x%p\n",
661 parent->base, dir.base);
662
663 while(nubus_readdir(&dir, &ent) != -1)
664 {
665 switch (ent.type) {
666 case NUBUS_RESID_TYPE:
667 {
668 unsigned short nbtdata[4];
669 /* This type is always the same, and is not
670 useful except insofar as it tells us that
671 we really are looking at a board resource. */
672 nubus_get_rsrc_mem(nbtdata, &ent, 8);
673 printk(KERN_INFO " type: [cat 0x%x type 0x%x hw 0x%x sw 0x%x]\n",
674 nbtdata[0], nbtdata[1], nbtdata[2],
675 nbtdata[3]);
676 if (nbtdata[0] != 1 || nbtdata[1] != 0 ||
677 nbtdata[2] != 0 || nbtdata[3] != 0)
678 printk(KERN_ERR "this sResource is not a board resource!\n");
679 break;
680 }
681 case NUBUS_RESID_NAME:
682 nubus_get_rsrc_str(board->name, &ent, 64);
683 printk(KERN_INFO " name: %s\n", board->name);
684 break;
685 case NUBUS_RESID_ICON:
686 nubus_get_icon(board, &ent);
687 break;
688 case NUBUS_RESID_BOARDID:
689 printk(KERN_INFO " board id: 0x%x\n", ent.data);
690 break;
691 case NUBUS_RESID_PRIMARYINIT:
692 printk(KERN_INFO " primary init offset: 0x%06x\n", ent.data);
693 break;
694 case NUBUS_RESID_VENDORINFO:
695 nubus_get_vendorinfo(board, &ent);
696 break;
697 case NUBUS_RESID_FLAGS:
698 printk(KERN_INFO " flags: 0x%06x\n", ent.data);
699 break;
700 case NUBUS_RESID_HWDEVID:
701 printk(KERN_INFO " hwdevid: 0x%06x\n", ent.data);
702 break;
703 case NUBUS_RESID_SECONDINIT:
704 printk(KERN_INFO " secondary init offset: 0x%06x\n", ent.data);
705 break;
706 /* WTF isn't this in the functional resources? */
707 case NUBUS_RESID_VIDNAMES:
708 nubus_get_vidnames(board, &ent);
709 break;
710 /* Same goes for this */
711 case NUBUS_RESID_VIDMODES:
712 printk(KERN_INFO " video mode parameter directory offset: 0x%06x\n",
713 ent.data);
714 break;
715 default:
716 printk(KERN_INFO " unknown resource %02X, data 0x%06x\n",
717 ent.type, ent.data);
718 }
719 }
720 return 0;
721}
722
723/* Attempt to bypass the somewhat non-obvious arrangement of
724 sResources in the motherboard ROM */
725static void __init nubus_find_rom_dir(struct nubus_board* board)
726{
727 unsigned char* rp;
728 unsigned char* romdir;
729 struct nubus_dir dir;
730 struct nubus_dirent ent;
731
732 /* Check for the extra directory just under the format block */
733 rp = board->fblock;
734 nubus_rewind(&rp, 4, board->lanes);
735 if (nubus_get_rom(&rp, 4, board->lanes) != NUBUS_TEST_PATTERN) {
736 /* OK, the ROM was telling the truth */
737 board->directory = board->fblock;
738 nubus_move(&board->directory,
739 nubus_expand32(board->doffset),
740 board->lanes);
741 return;
742 }
743
744 /* On "slot zero", you have to walk down a few more
745 directories to get to the equivalent of a real card's root
746 directory. We don't know what they were smoking when they
747 came up with this. */
748 romdir = nubus_rom_addr(board->slot);
749 nubus_rewind(&romdir, ROM_DIR_OFFSET, board->lanes);
750 dir.base = dir.ptr = romdir;
751 dir.done = 0;
752 dir.mask = board->lanes;
753
754 /* This one points to an "Unknown Macintosh" directory */
755 if (nubus_readdir(&dir, &ent) == -1)
756 goto badrom;
757
758 if (console_loglevel >= 10)
759 printk(KERN_INFO "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data);
760 /* This one takes us to where we want to go. */
761 if (nubus_readdir(&dir, &ent) == -1)
762 goto badrom;
763 if (console_loglevel >= 10)
764 printk(KERN_DEBUG "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data);
765 nubus_get_subdir(&ent, &dir);
766
767 /* Resource ID 01, also an "Unknown Macintosh" */
768 if (nubus_readdir(&dir, &ent) == -1)
769 goto badrom;
770 if (console_loglevel >= 10)
771 printk(KERN_DEBUG "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data);
772
773 /* FIXME: the first one is *not* always the right one. We
774 suspect this has something to do with the ROM revision.
775 "The HORROR ROM" (LC-series) uses 0x7e, while "The HORROR
776 Continues" (Q630) uses 0x7b. The DAFB Macs evidently use
777 something else. Please run "Slots" on your Mac (see
778 include/linux/nubus.h for where to get this program) and
779 tell us where the 'SiDirPtr' for Slot 0 is. If you feel
780 brave, you should also use MacsBug to walk down the ROM
781 directories like this function does and try to find the
782 path to that address... */
783 if (nubus_readdir(&dir, &ent) == -1)
784 goto badrom;
785 if (console_loglevel >= 10)
786 printk(KERN_DEBUG "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data);
787
788 /* Bwahahahaha... */
789 nubus_get_subdir(&ent, &dir);
790 board->directory = dir.base;
791 return;
792
793 /* Even more evil laughter... */
794 badrom:
795 board->directory = board->fblock;
796 nubus_move(&board->directory, nubus_expand32(board->doffset), board->lanes);
797 printk(KERN_ERR "nubus_get_rom_dir: ROM weirdness! Notify the developers...\n");
798}
799
800/* Add a board (might be many devices) to the list */
801static struct nubus_board* __init nubus_add_board(int slot, int bytelanes)
802{
803 struct nubus_board* board;
804 struct nubus_board** boardp;
805
806 unsigned char *rp;
807 unsigned long dpat;
808 struct nubus_dir dir;
809 struct nubus_dirent ent;
810
811 /* Move to the start of the format block */
812 rp = nubus_rom_addr(slot);
813 nubus_rewind(&rp, FORMAT_BLOCK_SIZE, bytelanes);
814
815 /* Actually we should probably panic if this fails */
816 if ((board = kzalloc(sizeof(*board), GFP_ATOMIC)) == NULL)
817 return NULL;
818 board->fblock = rp;
819
820 /* Dump the format block for debugging purposes */
821 if (console_loglevel >= 10) {
822 int i;
823 printk(KERN_DEBUG "Slot %X, format block at 0x%p\n",
824 slot, rp);
825 printk(KERN_DEBUG "Format block: ");
826 for (i = 0; i < FORMAT_BLOCK_SIZE; i += 4) {
827 unsigned short foo, bar;
828 foo = nubus_get_rom(&rp, 2, bytelanes);
829 bar = nubus_get_rom(&rp, 2, bytelanes);
830 printk("%04x %04x ", foo, bar);
831 }
832 printk("\n");
833 rp = board->fblock;
834 }
835
836 board->slot = slot;
837 board->slot_addr = (unsigned long) nubus_slot_addr(slot);
838 board->doffset = nubus_get_rom(&rp, 4, bytelanes);
839 /* rom_length is *supposed* to be the total length of the
840 * ROM. In practice it is the "amount of ROM used to compute
841 * the CRC." So some jokers decide to set it to zero and
842 * set the crc to zero so they don't have to do any math.
843 * See the Performa 460 ROM, for example. Those Apple "engineers".
844 */
845 board->rom_length = nubus_get_rom(&rp, 4, bytelanes);
846 board->crc = nubus_get_rom(&rp, 4, bytelanes);
847 board->rev = nubus_get_rom(&rp, 1, bytelanes);
848 board->format = nubus_get_rom(&rp,1, bytelanes);
849 board->lanes = bytelanes;
850
851 /* Directory offset should be small and negative... */
852 if(!(board->doffset & 0x00FF0000))
853 printk(KERN_WARNING "Dodgy doffset!\n");
854 dpat = nubus_get_rom(&rp, 4, bytelanes);
855 if(dpat != NUBUS_TEST_PATTERN)
856 printk(KERN_WARNING "Wrong test pattern %08lx!\n", dpat);
857
858 /*
859 * I wonder how the CRC is meant to work -
860 * any takers ?
861 * CSA: According to MAC docs, not all cards pass the CRC anyway,
862 * since the initial Macintosh ROM releases skipped the check.
863 */
864
865 /* Attempt to work around slot zero weirdness */
866 nubus_find_rom_dir(board);
867 nubus_get_root_dir(board, &dir);
868
869 /* We're ready to rock */
870 printk(KERN_INFO "Slot %X:\n", slot);
871
872 /* Each slot should have one board resource and any number of
873 functional resources. So we'll fill in some fields in the
874 struct nubus_board from the board resource, then walk down
875 the list of functional resources, spinning out a nubus_dev
876 for each of them. */
877 if (nubus_readdir(&dir, &ent) == -1) {
878 /* We can't have this! */
879 printk(KERN_ERR "Board resource not found!\n");
880 return NULL;
881 } else {
882 printk(KERN_INFO " Board resource:\n");
883 nubus_get_board_resource(board, slot, &ent);
884 }
885
886 /* Aaaarrrrgghh! The LC III motherboard has *two* board
887 resources. I have no idea WTF to do about this. */
888
889 while (nubus_readdir(&dir, &ent) != -1) {
890 struct nubus_dev* dev;
891 struct nubus_dev** devp;
892 dev = nubus_get_functional_resource(board, slot, &ent);
893 if (dev == NULL)
894 continue;
895
896 /* We zeroed this out above */
897 if (board->first_dev == NULL)
898 board->first_dev = dev;
899
900 /* Put it on the global NuBus device chain. Keep entries in order. */
901 for (devp=&nubus_devices; *devp!=NULL; devp=&((*devp)->next))
902 /* spin */;
903 *devp = dev;
904 dev->next = NULL;
905 }
906
907 /* Put it on the global NuBus board chain. Keep entries in order. */
908 for (boardp=&nubus_boards; *boardp!=NULL; boardp=&((*boardp)->next))
909 /* spin */;
910 *boardp = board;
911 board->next = NULL;
912
913 return board;
914}
915
916void __init nubus_probe_slot(int slot)
917{
918 unsigned char dp;
919 unsigned char* rp;
920 int i;
921
922 rp = nubus_rom_addr(slot);
923 for(i = 4; i; i--)
924 {
925 unsigned long flags;
926 int card_present;
927
928 rp--;
929 local_irq_save(flags);
930 card_present = hwreg_present(rp);
931 local_irq_restore(flags);
932
933 if (!card_present)
934 continue;
935
936 printk(KERN_DEBUG "Now probing slot %X at %p\n", slot, rp);
937 dp = *rp;
938 if(dp == 0)
939 continue;
940
941 /* The last byte of the format block consists of two
942 nybbles which are "mirror images" of each other.
943 These show us the valid bytelanes */
944 if ((((dp>>4) ^ dp) & 0x0F) != 0x0F)
945 continue;
946 /* Check that this value is actually *on* one of the
947 bytelanes it claims are valid! */
948 if ((dp & 0x0F) >= (1<<i))
949 continue;
950
951 /* Looks promising. Let's put it on the list. */
952 nubus_add_board(slot, dp);
953
954 return;
955 }
956}
957
958#if defined(CONFIG_PROC_FS)
959
960/* /proc/nubus stuff */
961
962static int sprint_nubus_board(struct nubus_board* board, char* ptr, int len)
963{
964 if(len < 100)
965 return -1;
966
967 sprintf(ptr, "Slot %X: %s\n",
968 board->slot, board->name);
969
970 return strlen(ptr);
971}
972
973static int nubus_read_proc(char *page, char **start, off_t off,
974 int count, int *eof, void *data)
975{
976 int nprinted, len, begin = 0;
977 int size = PAGE_SIZE;
978 struct nubus_board* board;
979
980 len = sprintf(page, "Nubus devices found:\n");
981 /* Walk the list of NuBus boards */
982 for (board = nubus_boards; board != NULL; board = board->next)
983 {
984 nprinted = sprint_nubus_board(board, page + len, size - len);
985 if (nprinted < 0)
986 break;
987 len += nprinted;
988 if (len+begin < off) {
989 begin += len;
990 len = 0;
991 }
992 if (len+begin >= off+count)
993 break;
994 }
995 if (len+begin < off)
996 *eof = 1;
997 off -= begin;
998 *start = page + off;
999 len -= off;
1000 if (len>count)
1001 len = count;
1002 if (len<0)
1003 len = 0;
1004 return len;
1005}
1006#endif
1007
1008void __init nubus_scan_bus(void)
1009{
1010 int slot;
1011 /* This might not work on your machine */
1012#ifdef I_WANT_TO_PROBE_SLOT_ZERO
1013 nubus_probe_slot(0);
1014#endif
1015 for(slot = 9; slot < 15; slot++)
1016 {
1017 nubus_probe_slot(slot);
1018 }
1019}
1020
1021static int __init nubus_init(void)
1022{
1023 if (!MACH_IS_MAC)
1024 return 0;
1025
1026 /* Initialize the NuBus interrupts */
1027 if (oss_present) {
1028 oss_nubus_init();
1029 } else {
1030 via_nubus_init();
1031 }
1032
1033#ifdef TRY_TO_DODGE_WSOD
1034 /* Rogue Ethernet interrupts can kill the machine if we don't
1035 do this. Obviously this is bogus. Hopefully the local VIA
1036 gurus can fix the real cause of the problem. */
1037 mdelay(1000);
1038#endif
1039
1040 /* And probe */
1041 printk("NuBus: Scanning NuBus slots.\n");
1042 nubus_devices = NULL;
1043 nubus_boards = NULL;
1044 nubus_scan_bus();
1045
1046#ifdef CONFIG_PROC_FS
1047 create_proc_read_entry("nubus", 0, NULL, nubus_read_proc, NULL);
1048 nubus_proc_init();
1049#endif
1050 return 0;
1051}
1052
1053subsys_initcall(nubus_init);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Macintosh Nubus Interface Code
4 *
5 * Originally by Alan Cox
6 *
7 * Mostly rewritten by David Huggins-Daines, C. Scott Ananian,
8 * and others.
9 */
10
11#include <linux/types.h>
12#include <linux/kernel.h>
13#include <linux/string.h>
14#include <linux/nubus.h>
15#include <linux/errno.h>
16#include <linux/init.h>
17#include <linux/module.h>
18#include <linux/seq_file.h>
19#include <linux/slab.h>
20#include <asm/setup.h>
21#include <asm/page.h>
22#include <asm/hwtest.h>
23
24/* Constants */
25
26/* This is, of course, the size in bytelanes, rather than the size in
27 actual bytes */
28#define FORMAT_BLOCK_SIZE 20
29#define ROM_DIR_OFFSET 0x24
30
31#define NUBUS_TEST_PATTERN 0x5A932BC7
32
33/* Globals */
34
35LIST_HEAD(nubus_func_rsrcs);
36
37/* Meaning of "bytelanes":
38
39 The card ROM may appear on any or all bytes of each long word in
40 NuBus memory. The low 4 bits of the "map" value found in the
41 format block (at the top of the slot address space, as well as at
42 the top of the MacOS ROM) tells us which bytelanes, i.e. which byte
43 offsets within each longword, are valid. Thus:
44
45 A map of 0x0f, as found in the MacOS ROM, means that all bytelanes
46 are valid.
47
48 A map of 0xf0 means that no bytelanes are valid (We pray that we
49 will never encounter this, but stranger things have happened)
50
51 A map of 0xe1 means that only the MSB of each long word is actually
52 part of the card ROM. (We hope to never encounter NuBus on a
53 little-endian machine. Again, stranger things have happened)
54
55 A map of 0x78 means that only the LSB of each long word is valid.
56
57 Etcetera, etcetera. Hopefully this clears up some confusion over
58 what the following code actually does. */
59
60static inline int not_useful(void *p, int map)
61{
62 unsigned long pv = (unsigned long)p;
63
64 pv &= 3;
65 if (map & (1 << pv))
66 return 0;
67 return 1;
68}
69
70static unsigned long nubus_get_rom(unsigned char **ptr, int len, int map)
71{
72 /* This will hold the result */
73 unsigned long v = 0;
74 unsigned char *p = *ptr;
75
76 while (len) {
77 v <<= 8;
78 while (not_useful(p, map))
79 p++;
80 v |= *p++;
81 len--;
82 }
83 *ptr = p;
84 return v;
85}
86
87static void nubus_rewind(unsigned char **ptr, int len, int map)
88{
89 unsigned char *p = *ptr;
90
91 while (len) {
92 do {
93 p--;
94 } while (not_useful(p, map));
95 len--;
96 }
97 *ptr = p;
98}
99
100static void nubus_advance(unsigned char **ptr, int len, int map)
101{
102 unsigned char *p = *ptr;
103
104 while (len) {
105 while (not_useful(p, map))
106 p++;
107 p++;
108 len--;
109 }
110 *ptr = p;
111}
112
113static void nubus_move(unsigned char **ptr, int len, int map)
114{
115 unsigned long slot_space = (unsigned long)*ptr & 0xFF000000;
116
117 if (len > 0)
118 nubus_advance(ptr, len, map);
119 else if (len < 0)
120 nubus_rewind(ptr, -len, map);
121
122 if (((unsigned long)*ptr & 0xFF000000) != slot_space)
123 pr_err("%s: moved out of slot address space!\n", __func__);
124}
125
126/* Now, functions to read the sResource tree */
127
128/* Each sResource entry consists of a 1-byte ID and a 3-byte data
129 field. If that data field contains an offset, then obviously we
130 have to expand it from a 24-bit signed number to a 32-bit signed
131 number. */
132
133static inline long nubus_expand32(long foo)
134{
135 if (foo & 0x00800000) /* 24bit negative */
136 foo |= 0xFF000000;
137 return foo;
138}
139
140static inline void *nubus_rom_addr(int slot)
141{
142 /*
143 * Returns the first byte after the card. We then walk
144 * backwards to get the lane register and the config
145 */
146 return (void *)(0xF1000000 + (slot << 24));
147}
148
149unsigned char *nubus_dirptr(const struct nubus_dirent *nd)
150{
151 unsigned char *p = nd->base;
152
153 /* Essentially, just step over the bytelanes using whatever
154 offset we might have found */
155 nubus_move(&p, nubus_expand32(nd->data), nd->mask);
156 /* And return the value */
157 return p;
158}
159
160/* These two are for pulling resource data blocks (i.e. stuff that's
161 pointed to with offsets) out of the card ROM. */
162
163void nubus_get_rsrc_mem(void *dest, const struct nubus_dirent *dirent,
164 unsigned int len)
165{
166 unsigned char *t = dest;
167 unsigned char *p = nubus_dirptr(dirent);
168
169 while (len) {
170 *t++ = nubus_get_rom(&p, 1, dirent->mask);
171 len--;
172 }
173}
174EXPORT_SYMBOL(nubus_get_rsrc_mem);
175
176unsigned int nubus_get_rsrc_str(char *dest, const struct nubus_dirent *dirent,
177 unsigned int len)
178{
179 char *t = dest;
180 unsigned char *p = nubus_dirptr(dirent);
181
182 while (len > 1) {
183 unsigned char c = nubus_get_rom(&p, 1, dirent->mask);
184
185 if (!c)
186 break;
187 *t++ = c;
188 len--;
189 }
190 if (len > 0)
191 *t = '\0';
192 return t - dest;
193}
194EXPORT_SYMBOL(nubus_get_rsrc_str);
195
196void nubus_seq_write_rsrc_mem(struct seq_file *m,
197 const struct nubus_dirent *dirent,
198 unsigned int len)
199{
200 unsigned long buf[32];
201 unsigned int buf_size = sizeof(buf);
202 unsigned char *p = nubus_dirptr(dirent);
203
204 /* If possible, write out full buffers */
205 while (len >= buf_size) {
206 unsigned int i;
207
208 for (i = 0; i < ARRAY_SIZE(buf); i++)
209 buf[i] = nubus_get_rom(&p, sizeof(buf[0]),
210 dirent->mask);
211 seq_write(m, buf, buf_size);
212 len -= buf_size;
213 }
214 /* If not, write out individual bytes */
215 while (len--)
216 seq_putc(m, nubus_get_rom(&p, 1, dirent->mask));
217}
218
219int nubus_get_root_dir(const struct nubus_board *board,
220 struct nubus_dir *dir)
221{
222 dir->ptr = dir->base = board->directory;
223 dir->done = 0;
224 dir->mask = board->lanes;
225 return 0;
226}
227EXPORT_SYMBOL(nubus_get_root_dir);
228
229/* This is a slyly renamed version of the above */
230int nubus_get_func_dir(const struct nubus_rsrc *fres, struct nubus_dir *dir)
231{
232 dir->ptr = dir->base = fres->directory;
233 dir->done = 0;
234 dir->mask = fres->board->lanes;
235 return 0;
236}
237EXPORT_SYMBOL(nubus_get_func_dir);
238
239int nubus_get_board_dir(const struct nubus_board *board,
240 struct nubus_dir *dir)
241{
242 struct nubus_dirent ent;
243
244 dir->ptr = dir->base = board->directory;
245 dir->done = 0;
246 dir->mask = board->lanes;
247
248 /* Now dereference it (the first directory is always the board
249 directory) */
250 if (nubus_readdir(dir, &ent) == -1)
251 return -1;
252 if (nubus_get_subdir(&ent, dir) == -1)
253 return -1;
254 return 0;
255}
256EXPORT_SYMBOL(nubus_get_board_dir);
257
258int nubus_get_subdir(const struct nubus_dirent *ent,
259 struct nubus_dir *dir)
260{
261 dir->ptr = dir->base = nubus_dirptr(ent);
262 dir->done = 0;
263 dir->mask = ent->mask;
264 return 0;
265}
266EXPORT_SYMBOL(nubus_get_subdir);
267
268int nubus_readdir(struct nubus_dir *nd, struct nubus_dirent *ent)
269{
270 u32 resid;
271
272 if (nd->done)
273 return -1;
274
275 /* Do this first, otherwise nubus_rewind & co are off by 4 */
276 ent->base = nd->ptr;
277
278 /* This moves nd->ptr forward */
279 resid = nubus_get_rom(&nd->ptr, 4, nd->mask);
280
281 /* EOL marker, as per the Apple docs */
282 if ((resid & 0xff000000) == 0xff000000) {
283 /* Mark it as done */
284 nd->done = 1;
285 return -1;
286 }
287
288 /* First byte is the resource ID */
289 ent->type = resid >> 24;
290 /* Low 3 bytes might contain data (or might not) */
291 ent->data = resid & 0xffffff;
292 ent->mask = nd->mask;
293 return 0;
294}
295EXPORT_SYMBOL(nubus_readdir);
296
297int nubus_rewinddir(struct nubus_dir *dir)
298{
299 dir->ptr = dir->base;
300 dir->done = 0;
301 return 0;
302}
303EXPORT_SYMBOL(nubus_rewinddir);
304
305/* Driver interface functions, more or less like in pci.c */
306
307struct nubus_rsrc *nubus_first_rsrc_or_null(void)
308{
309 return list_first_entry_or_null(&nubus_func_rsrcs, struct nubus_rsrc,
310 list);
311}
312EXPORT_SYMBOL(nubus_first_rsrc_or_null);
313
314struct nubus_rsrc *nubus_next_rsrc_or_null(struct nubus_rsrc *from)
315{
316 if (list_is_last(&from->list, &nubus_func_rsrcs))
317 return NULL;
318 return list_next_entry(from, list);
319}
320EXPORT_SYMBOL(nubus_next_rsrc_or_null);
321
322int
323nubus_find_rsrc(struct nubus_dir *dir, unsigned char rsrc_type,
324 struct nubus_dirent *ent)
325{
326 while (nubus_readdir(dir, ent) != -1) {
327 if (ent->type == rsrc_type)
328 return 0;
329 }
330 return -1;
331}
332EXPORT_SYMBOL(nubus_find_rsrc);
333
334/* Initialization functions - decide which slots contain stuff worth
335 looking at, and print out lots and lots of information from the
336 resource blocks. */
337
338static int __init nubus_get_block_rsrc_dir(struct nubus_board *board,
339 struct proc_dir_entry *procdir,
340 const struct nubus_dirent *parent)
341{
342 struct nubus_dir dir;
343 struct nubus_dirent ent;
344
345 nubus_get_subdir(parent, &dir);
346 dir.procdir = nubus_proc_add_rsrc_dir(procdir, parent, board);
347
348 while (nubus_readdir(&dir, &ent) != -1) {
349 u32 size;
350
351 nubus_get_rsrc_mem(&size, &ent, 4);
352 pr_debug(" block (0x%x), size %d\n", ent.type, size);
353 nubus_proc_add_rsrc_mem(dir.procdir, &ent, size);
354 }
355 return 0;
356}
357
358static int __init nubus_get_display_vidmode(struct nubus_board *board,
359 struct proc_dir_entry *procdir,
360 const struct nubus_dirent *parent)
361{
362 struct nubus_dir dir;
363 struct nubus_dirent ent;
364
365 nubus_get_subdir(parent, &dir);
366 dir.procdir = nubus_proc_add_rsrc_dir(procdir, parent, board);
367
368 while (nubus_readdir(&dir, &ent) != -1) {
369 switch (ent.type) {
370 case 1: /* mVidParams */
371 case 2: /* mTable */
372 {
373 u32 size;
374
375 nubus_get_rsrc_mem(&size, &ent, 4);
376 pr_debug(" block (0x%x), size %d\n", ent.type,
377 size);
378 nubus_proc_add_rsrc_mem(dir.procdir, &ent, size);
379 break;
380 }
381 default:
382 pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
383 ent.type, ent.data);
384 nubus_proc_add_rsrc_mem(dir.procdir, &ent, 0);
385 }
386 }
387 return 0;
388}
389
390static int __init nubus_get_display_resource(struct nubus_rsrc *fres,
391 struct proc_dir_entry *procdir,
392 const struct nubus_dirent *ent)
393{
394 switch (ent->type) {
395 case NUBUS_RESID_GAMMADIR:
396 pr_debug(" gamma directory offset: 0x%06x\n", ent->data);
397 nubus_get_block_rsrc_dir(fres->board, procdir, ent);
398 break;
399 case 0x0080 ... 0x0085:
400 pr_debug(" mode 0x%02x info offset: 0x%06x\n",
401 ent->type, ent->data);
402 nubus_get_display_vidmode(fres->board, procdir, ent);
403 break;
404 default:
405 pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
406 ent->type, ent->data);
407 nubus_proc_add_rsrc_mem(procdir, ent, 0);
408 }
409 return 0;
410}
411
412static int __init nubus_get_network_resource(struct nubus_rsrc *fres,
413 struct proc_dir_entry *procdir,
414 const struct nubus_dirent *ent)
415{
416 switch (ent->type) {
417 case NUBUS_RESID_MAC_ADDRESS:
418 {
419 char addr[6];
420
421 nubus_get_rsrc_mem(addr, ent, 6);
422 pr_debug(" MAC address: %pM\n", addr);
423 nubus_proc_add_rsrc_mem(procdir, ent, 6);
424 break;
425 }
426 default:
427 pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
428 ent->type, ent->data);
429 nubus_proc_add_rsrc_mem(procdir, ent, 0);
430 }
431 return 0;
432}
433
434static int __init nubus_get_cpu_resource(struct nubus_rsrc *fres,
435 struct proc_dir_entry *procdir,
436 const struct nubus_dirent *ent)
437{
438 switch (ent->type) {
439 case NUBUS_RESID_MEMINFO:
440 {
441 unsigned long meminfo[2];
442
443 nubus_get_rsrc_mem(&meminfo, ent, 8);
444 pr_debug(" memory: [ 0x%08lx 0x%08lx ]\n",
445 meminfo[0], meminfo[1]);
446 nubus_proc_add_rsrc_mem(procdir, ent, 8);
447 break;
448 }
449 case NUBUS_RESID_ROMINFO:
450 {
451 unsigned long rominfo[2];
452
453 nubus_get_rsrc_mem(&rominfo, ent, 8);
454 pr_debug(" ROM: [ 0x%08lx 0x%08lx ]\n",
455 rominfo[0], rominfo[1]);
456 nubus_proc_add_rsrc_mem(procdir, ent, 8);
457 break;
458 }
459 default:
460 pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
461 ent->type, ent->data);
462 nubus_proc_add_rsrc_mem(procdir, ent, 0);
463 }
464 return 0;
465}
466
467static int __init nubus_get_private_resource(struct nubus_rsrc *fres,
468 struct proc_dir_entry *procdir,
469 const struct nubus_dirent *ent)
470{
471 switch (fres->category) {
472 case NUBUS_CAT_DISPLAY:
473 nubus_get_display_resource(fres, procdir, ent);
474 break;
475 case NUBUS_CAT_NETWORK:
476 nubus_get_network_resource(fres, procdir, ent);
477 break;
478 case NUBUS_CAT_CPU:
479 nubus_get_cpu_resource(fres, procdir, ent);
480 break;
481 default:
482 pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
483 ent->type, ent->data);
484 nubus_proc_add_rsrc_mem(procdir, ent, 0);
485 }
486 return 0;
487}
488
489static struct nubus_rsrc * __init
490nubus_get_functional_resource(struct nubus_board *board, int slot,
491 const struct nubus_dirent *parent)
492{
493 struct nubus_dir dir;
494 struct nubus_dirent ent;
495 struct nubus_rsrc *fres;
496
497 pr_debug(" Functional resource 0x%02x:\n", parent->type);
498 nubus_get_subdir(parent, &dir);
499 dir.procdir = nubus_proc_add_rsrc_dir(board->procdir, parent, board);
500
501 /* Actually we should probably panic if this fails */
502 fres = kzalloc(sizeof(*fres), GFP_ATOMIC);
503 if (!fres)
504 return NULL;
505 fres->resid = parent->type;
506 fres->directory = dir.base;
507 fres->board = board;
508
509 while (nubus_readdir(&dir, &ent) != -1) {
510 switch (ent.type) {
511 case NUBUS_RESID_TYPE:
512 {
513 unsigned short nbtdata[4];
514
515 nubus_get_rsrc_mem(nbtdata, &ent, 8);
516 fres->category = nbtdata[0];
517 fres->type = nbtdata[1];
518 fres->dr_sw = nbtdata[2];
519 fres->dr_hw = nbtdata[3];
520 pr_debug(" type: [cat 0x%x type 0x%x sw 0x%x hw 0x%x]\n",
521 nbtdata[0], nbtdata[1], nbtdata[2], nbtdata[3]);
522 nubus_proc_add_rsrc_mem(dir.procdir, &ent, 8);
523 break;
524 }
525 case NUBUS_RESID_NAME:
526 {
527 char name[64];
528 unsigned int len;
529
530 len = nubus_get_rsrc_str(name, &ent, sizeof(name));
531 pr_debug(" name: %s\n", name);
532 nubus_proc_add_rsrc_mem(dir.procdir, &ent, len + 1);
533 break;
534 }
535 case NUBUS_RESID_DRVRDIR:
536 {
537 /* MacOS driver. If we were NetBSD we might
538 use this :-) */
539 pr_debug(" driver directory offset: 0x%06x\n",
540 ent.data);
541 nubus_get_block_rsrc_dir(board, dir.procdir, &ent);
542 break;
543 }
544 case NUBUS_RESID_MINOR_BASEOS:
545 {
546 /* We will need this in order to support
547 multiple framebuffers. It might be handy
548 for Ethernet as well */
549 u32 base_offset;
550
551 nubus_get_rsrc_mem(&base_offset, &ent, 4);
552 pr_debug(" memory offset: 0x%08x\n", base_offset);
553 nubus_proc_add_rsrc_mem(dir.procdir, &ent, 4);
554 break;
555 }
556 case NUBUS_RESID_MINOR_LENGTH:
557 {
558 /* Ditto */
559 u32 length;
560
561 nubus_get_rsrc_mem(&length, &ent, 4);
562 pr_debug(" memory length: 0x%08x\n", length);
563 nubus_proc_add_rsrc_mem(dir.procdir, &ent, 4);
564 break;
565 }
566 case NUBUS_RESID_FLAGS:
567 pr_debug(" flags: 0x%06x\n", ent.data);
568 nubus_proc_add_rsrc(dir.procdir, &ent);
569 break;
570 case NUBUS_RESID_HWDEVID:
571 pr_debug(" hwdevid: 0x%06x\n", ent.data);
572 nubus_proc_add_rsrc(dir.procdir, &ent);
573 break;
574 default:
575 /* Local/Private resources have their own
576 function */
577 nubus_get_private_resource(fres, dir.procdir, &ent);
578 }
579 }
580
581 return fres;
582}
583
584/* This is *really* cool. */
585static int __init nubus_get_icon(struct nubus_board *board,
586 struct proc_dir_entry *procdir,
587 const struct nubus_dirent *ent)
588{
589 /* Should be 32x32 if my memory serves me correctly */
590 u32 icon[32];
591 int i;
592
593 nubus_get_rsrc_mem(&icon, ent, 128);
594 pr_debug(" icon:\n");
595 for (i = 0; i < 8; i++)
596 pr_debug(" %08x %08x %08x %08x\n",
597 icon[i * 4 + 0], icon[i * 4 + 1],
598 icon[i * 4 + 2], icon[i * 4 + 3]);
599 nubus_proc_add_rsrc_mem(procdir, ent, 128);
600
601 return 0;
602}
603
604static int __init nubus_get_vendorinfo(struct nubus_board *board,
605 struct proc_dir_entry *procdir,
606 const struct nubus_dirent *parent)
607{
608 struct nubus_dir dir;
609 struct nubus_dirent ent;
610 static char *vendor_fields[6] = { "ID", "serial", "revision",
611 "part", "date", "unknown field" };
612
613 pr_debug(" vendor info:\n");
614 nubus_get_subdir(parent, &dir);
615 dir.procdir = nubus_proc_add_rsrc_dir(procdir, parent, board);
616
617 while (nubus_readdir(&dir, &ent) != -1) {
618 char name[64];
619 unsigned int len;
620
621 /* These are all strings, we think */
622 len = nubus_get_rsrc_str(name, &ent, sizeof(name));
623 if (ent.type < 1 || ent.type > 5)
624 ent.type = 5;
625 pr_debug(" %s: %s\n", vendor_fields[ent.type - 1], name);
626 nubus_proc_add_rsrc_mem(dir.procdir, &ent, len + 1);
627 }
628 return 0;
629}
630
631static int __init nubus_get_board_resource(struct nubus_board *board, int slot,
632 const struct nubus_dirent *parent)
633{
634 struct nubus_dir dir;
635 struct nubus_dirent ent;
636
637 pr_debug(" Board resource 0x%02x:\n", parent->type);
638 nubus_get_subdir(parent, &dir);
639 dir.procdir = nubus_proc_add_rsrc_dir(board->procdir, parent, board);
640
641 while (nubus_readdir(&dir, &ent) != -1) {
642 switch (ent.type) {
643 case NUBUS_RESID_TYPE:
644 {
645 unsigned short nbtdata[4];
646 /* This type is always the same, and is not
647 useful except insofar as it tells us that
648 we really are looking at a board resource. */
649 nubus_get_rsrc_mem(nbtdata, &ent, 8);
650 pr_debug(" type: [cat 0x%x type 0x%x sw 0x%x hw 0x%x]\n",
651 nbtdata[0], nbtdata[1], nbtdata[2], nbtdata[3]);
652 if (nbtdata[0] != 1 || nbtdata[1] != 0 ||
653 nbtdata[2] != 0 || nbtdata[3] != 0)
654 pr_err("Slot %X: sResource is not a board resource!\n",
655 slot);
656 nubus_proc_add_rsrc_mem(dir.procdir, &ent, 8);
657 break;
658 }
659 case NUBUS_RESID_NAME:
660 {
661 unsigned int len;
662
663 len = nubus_get_rsrc_str(board->name, &ent,
664 sizeof(board->name));
665 pr_debug(" name: %s\n", board->name);
666 nubus_proc_add_rsrc_mem(dir.procdir, &ent, len + 1);
667 break;
668 }
669 case NUBUS_RESID_ICON:
670 nubus_get_icon(board, dir.procdir, &ent);
671 break;
672 case NUBUS_RESID_BOARDID:
673 pr_debug(" board id: 0x%x\n", ent.data);
674 nubus_proc_add_rsrc(dir.procdir, &ent);
675 break;
676 case NUBUS_RESID_PRIMARYINIT:
677 pr_debug(" primary init offset: 0x%06x\n", ent.data);
678 nubus_proc_add_rsrc(dir.procdir, &ent);
679 break;
680 case NUBUS_RESID_VENDORINFO:
681 nubus_get_vendorinfo(board, dir.procdir, &ent);
682 break;
683 case NUBUS_RESID_FLAGS:
684 pr_debug(" flags: 0x%06x\n", ent.data);
685 nubus_proc_add_rsrc(dir.procdir, &ent);
686 break;
687 case NUBUS_RESID_HWDEVID:
688 pr_debug(" hwdevid: 0x%06x\n", ent.data);
689 nubus_proc_add_rsrc(dir.procdir, &ent);
690 break;
691 case NUBUS_RESID_SECONDINIT:
692 pr_debug(" secondary init offset: 0x%06x\n",
693 ent.data);
694 nubus_proc_add_rsrc(dir.procdir, &ent);
695 break;
696 /* WTF isn't this in the functional resources? */
697 case NUBUS_RESID_VIDNAMES:
698 pr_debug(" vidnames directory offset: 0x%06x\n",
699 ent.data);
700 nubus_get_block_rsrc_dir(board, dir.procdir, &ent);
701 break;
702 /* Same goes for this */
703 case NUBUS_RESID_VIDMODES:
704 pr_debug(" video mode parameter directory offset: 0x%06x\n",
705 ent.data);
706 nubus_proc_add_rsrc(dir.procdir, &ent);
707 break;
708 default:
709 pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
710 ent.type, ent.data);
711 nubus_proc_add_rsrc_mem(dir.procdir, &ent, 0);
712 }
713 }
714 return 0;
715}
716
717static void __init nubus_add_board(int slot, int bytelanes)
718{
719 struct nubus_board *board;
720 unsigned char *rp;
721 unsigned long dpat;
722 struct nubus_dir dir;
723 struct nubus_dirent ent;
724 int prev_resid = -1;
725
726 /* Move to the start of the format block */
727 rp = nubus_rom_addr(slot);
728 nubus_rewind(&rp, FORMAT_BLOCK_SIZE, bytelanes);
729
730 /* Actually we should probably panic if this fails */
731 if ((board = kzalloc(sizeof(*board), GFP_ATOMIC)) == NULL)
732 return;
733 board->fblock = rp;
734
735 /* Dump the format block for debugging purposes */
736 pr_debug("Slot %X, format block at 0x%p:\n", slot, rp);
737 pr_debug("%08lx\n", nubus_get_rom(&rp, 4, bytelanes));
738 pr_debug("%08lx\n", nubus_get_rom(&rp, 4, bytelanes));
739 pr_debug("%08lx\n", nubus_get_rom(&rp, 4, bytelanes));
740 pr_debug("%02lx\n", nubus_get_rom(&rp, 1, bytelanes));
741 pr_debug("%02lx\n", nubus_get_rom(&rp, 1, bytelanes));
742 pr_debug("%08lx\n", nubus_get_rom(&rp, 4, bytelanes));
743 pr_debug("%02lx\n", nubus_get_rom(&rp, 1, bytelanes));
744 pr_debug("%02lx\n", nubus_get_rom(&rp, 1, bytelanes));
745 rp = board->fblock;
746
747 board->slot = slot;
748 board->slot_addr = (unsigned long)nubus_slot_addr(slot);
749 board->doffset = nubus_get_rom(&rp, 4, bytelanes);
750 /* rom_length is *supposed* to be the total length of the
751 * ROM. In practice it is the "amount of ROM used to compute
752 * the CRC." So some jokers decide to set it to zero and
753 * set the crc to zero so they don't have to do any math.
754 * See the Performa 460 ROM, for example. Those Apple "engineers".
755 */
756 board->rom_length = nubus_get_rom(&rp, 4, bytelanes);
757 board->crc = nubus_get_rom(&rp, 4, bytelanes);
758 board->rev = nubus_get_rom(&rp, 1, bytelanes);
759 board->format = nubus_get_rom(&rp, 1, bytelanes);
760 board->lanes = bytelanes;
761
762 /* Directory offset should be small and negative... */
763 if (!(board->doffset & 0x00FF0000))
764 pr_warn("Slot %X: Dodgy doffset!\n", slot);
765 dpat = nubus_get_rom(&rp, 4, bytelanes);
766 if (dpat != NUBUS_TEST_PATTERN)
767 pr_warn("Slot %X: Wrong test pattern %08lx!\n", slot, dpat);
768
769 /*
770 * I wonder how the CRC is meant to work -
771 * any takers ?
772 * CSA: According to MAC docs, not all cards pass the CRC anyway,
773 * since the initial Macintosh ROM releases skipped the check.
774 */
775
776 /* Set up the directory pointer */
777 board->directory = board->fblock;
778 nubus_move(&board->directory, nubus_expand32(board->doffset),
779 board->lanes);
780
781 nubus_get_root_dir(board, &dir);
782
783 /* We're ready to rock */
784 pr_debug("Slot %X resources:\n", slot);
785
786 /* Each slot should have one board resource and any number of
787 * functional resources. So we'll fill in some fields in the
788 * struct nubus_board from the board resource, then walk down
789 * the list of functional resources, spinning out a nubus_rsrc
790 * for each of them.
791 */
792 if (nubus_readdir(&dir, &ent) == -1) {
793 /* We can't have this! */
794 pr_err("Slot %X: Board resource not found!\n", slot);
795 kfree(board);
796 return;
797 }
798
799 if (ent.type < 1 || ent.type > 127)
800 pr_warn("Slot %X: Board resource ID is invalid!\n", slot);
801
802 board->procdir = nubus_proc_add_board(board);
803
804 nubus_get_board_resource(board, slot, &ent);
805
806 while (nubus_readdir(&dir, &ent) != -1) {
807 struct nubus_rsrc *fres;
808
809 fres = nubus_get_functional_resource(board, slot, &ent);
810 if (fres == NULL)
811 continue;
812
813 /* Resources should appear in ascending ID order. This sanity
814 * check prevents duplicate resource IDs.
815 */
816 if (fres->resid <= prev_resid) {
817 kfree(fres);
818 continue;
819 }
820 prev_resid = fres->resid;
821
822 list_add_tail(&fres->list, &nubus_func_rsrcs);
823 }
824
825 if (nubus_device_register(board))
826 put_device(&board->dev);
827}
828
829static void __init nubus_probe_slot(int slot)
830{
831 unsigned char dp;
832 unsigned char *rp;
833 int i;
834
835 rp = nubus_rom_addr(slot);
836 for (i = 4; i; i--) {
837 rp--;
838 if (!hwreg_present(rp))
839 continue;
840
841 dp = *rp;
842
843 /* The last byte of the format block consists of two
844 nybbles which are "mirror images" of each other.
845 These show us the valid bytelanes */
846 if ((((dp >> 4) ^ dp) & 0x0F) != 0x0F)
847 continue;
848 /* Check that this value is actually *on* one of the
849 bytelanes it claims are valid! */
850 if (not_useful(rp, dp))
851 continue;
852
853 /* Looks promising. Let's put it on the list. */
854 nubus_add_board(slot, dp);
855
856 return;
857 }
858}
859
860static void __init nubus_scan_bus(void)
861{
862 int slot;
863
864 pr_info("NuBus: Scanning NuBus slots.\n");
865 for (slot = 9; slot < 15; slot++) {
866 nubus_probe_slot(slot);
867 }
868}
869
870static int __init nubus_init(void)
871{
872 int err;
873
874 if (!MACH_IS_MAC)
875 return 0;
876
877 nubus_proc_init();
878 err = nubus_parent_device_register();
879 if (err)
880 return err;
881 nubus_scan_bus();
882 return 0;
883}
884
885subsys_initcall(nubus_init);