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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 | |
27 | extern void via_nubus_init(void); |
28 | extern 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 | |
49 | struct nubus_dev* nubus_devices; |
50 | struct 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 | |
75 | static 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 | |
84 | static 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 | |
102 | static 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 | |
121 | static 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 | |
136 | static 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 | |
151 | static inline long nubus_expand32(long foo) |
152 | { |
153 | if(foo & 0x00800000) /* 24bit negative */ |
154 | foo |= 0xFF000000; |
155 | return foo; |
156 | } |
157 | |
158 | static 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 | |
167 | static 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 | |
180 | void 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 | } |
191 | EXPORT_SYMBOL(nubus_get_rsrc_mem); |
192 | |
193 | void 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 | } |
206 | EXPORT_SYMBOL(nubus_get_rsrc_str); |
207 | |
208 | int 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 | } |
216 | EXPORT_SYMBOL(nubus_get_root_dir); |
217 | |
218 | /* This is a slyly renamed version of the above */ |
219 | int 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 | } |
227 | EXPORT_SYMBOL(nubus_get_func_dir); |
228 | |
229 | int 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 | } |
246 | EXPORT_SYMBOL(nubus_get_board_dir); |
247 | |
248 | int 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 | } |
256 | EXPORT_SYMBOL(nubus_get_subdir); |
257 | |
258 | int 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 | } |
285 | EXPORT_SYMBOL(nubus_readdir); |
286 | |
287 | int nubus_rewinddir(struct nubus_dir* dir) |
288 | { |
289 | dir->ptr = dir->base; |
290 | return 0; |
291 | } |
292 | EXPORT_SYMBOL(nubus_rewinddir); |
293 | |
294 | /* Driver interface functions, more or less like in pci.c */ |
295 | |
296 | struct nubus_dev* |
297 | nubus_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 | } |
316 | EXPORT_SYMBOL(nubus_find_device); |
317 | |
318 | struct nubus_dev* |
319 | nubus_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 | } |
334 | EXPORT_SYMBOL(nubus_find_type); |
335 | |
336 | struct nubus_dev* |
337 | nubus_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 | } |
350 | EXPORT_SYMBOL(nubus_find_slot); |
351 | |
352 | int |
353 | nubus_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 | } |
362 | EXPORT_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 | |
373 | static 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 | |
391 | static 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 | |
415 | static 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 | |
442 | static 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 | |
462 | static 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. */ |
557 | static 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. */ |
597 | static 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 | |
624 | static 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 | |
652 | static 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 */ |
725 | static 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 */ |
801 | static 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 | |
916 | void __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 | |
962 | static 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 | |
973 | static 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 | |
1008 | void __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 | |
1021 | static 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 | |
1053 | subsys_initcall(nubus_init); |
1054 |
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Tags:
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