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