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Commit | Line | Data |
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1da177e4 LT |
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 | ||
1da177e4 LT |
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 <asm/setup.h> | |
18 | #include <asm/system.h> | |
19 | #include <asm/page.h> | |
20 | #include <asm/hwtest.h> | |
21 | #include <linux/proc_fs.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 | ||
190 | void nubus_get_rsrc_str(void *dest, const struct nubus_dirent* dirent, | |
191 | int len) | |
192 | { | |
193 | unsigned char *t=(unsigned char *)dest; | |
194 | unsigned char *p = nubus_dirptr(dirent); | |
195 | while(len) | |
196 | { | |
197 | *t = nubus_get_rom(&p, 1, dirent->mask); | |
198 | if(!*t++) | |
199 | break; | |
200 | len--; | |
201 | } | |
202 | } | |
203 | ||
204 | int nubus_get_root_dir(const struct nubus_board* board, | |
205 | struct nubus_dir* dir) | |
206 | { | |
207 | dir->ptr = dir->base = board->directory; | |
208 | dir->done = 0; | |
209 | dir->mask = board->lanes; | |
210 | return 0; | |
211 | } | |
212 | ||
213 | /* This is a slyly renamed version of the above */ | |
214 | int nubus_get_func_dir(const struct nubus_dev* dev, | |
215 | struct nubus_dir* dir) | |
216 | { | |
217 | dir->ptr = dir->base = dev->directory; | |
218 | dir->done = 0; | |
219 | dir->mask = dev->board->lanes; | |
220 | return 0; | |
221 | } | |
222 | ||
223 | int nubus_get_board_dir(const struct nubus_board* board, | |
224 | struct nubus_dir* dir) | |
225 | { | |
226 | struct nubus_dirent ent; | |
227 | ||
228 | dir->ptr = dir->base = board->directory; | |
229 | dir->done = 0; | |
230 | dir->mask = board->lanes; | |
231 | ||
232 | /* Now dereference it (the first directory is always the board | |
233 | directory) */ | |
234 | if (nubus_readdir(dir, &ent) == -1) | |
235 | return -1; | |
236 | if (nubus_get_subdir(&ent, dir) == -1) | |
237 | return -1; | |
238 | return 0; | |
239 | } | |
240 | ||
241 | int nubus_get_subdir(const struct nubus_dirent *ent, | |
242 | struct nubus_dir *dir) | |
243 | { | |
244 | dir->ptr = dir->base = nubus_dirptr(ent); | |
245 | dir->done = 0; | |
246 | dir->mask = ent->mask; | |
247 | return 0; | |
248 | } | |
249 | ||
250 | int nubus_readdir(struct nubus_dir *nd, struct nubus_dirent *ent) | |
251 | { | |
252 | u32 resid; | |
253 | if (nd->done) | |
254 | return -1; | |
255 | ||
256 | /* Do this first, otherwise nubus_rewind & co are off by 4 */ | |
257 | ent->base = nd->ptr; | |
258 | ||
259 | /* This moves nd->ptr forward */ | |
260 | resid = nubus_get_rom(&nd->ptr, 4, nd->mask); | |
261 | ||
262 | /* EOL marker, as per the Apple docs */ | |
263 | if((resid&0xff000000) == 0xff000000) | |
264 | { | |
265 | /* Mark it as done */ | |
266 | nd->done = 1; | |
267 | return -1; | |
268 | } | |
269 | ||
270 | /* First byte is the resource ID */ | |
271 | ent->type = resid >> 24; | |
272 | /* Low 3 bytes might contain data (or might not) */ | |
273 | ent->data = resid & 0xffffff; | |
274 | ent->mask = nd->mask; | |
275 | return 0; | |
276 | } | |
277 | ||
278 | int nubus_rewinddir(struct nubus_dir* dir) | |
279 | { | |
280 | dir->ptr = dir->base; | |
281 | return 0; | |
282 | } | |
283 | ||
284 | /* Driver interface functions, more or less like in pci.c */ | |
285 | ||
286 | struct nubus_dev* | |
287 | nubus_find_device(unsigned short category, | |
288 | unsigned short type, | |
289 | unsigned short dr_hw, | |
290 | unsigned short dr_sw, | |
291 | const struct nubus_dev* from) | |
292 | { | |
293 | struct nubus_dev* itor = | |
294 | from ? from->next : nubus_devices; | |
295 | ||
296 | while (itor) { | |
297 | if (itor->category == category | |
298 | && itor->type == type | |
299 | && itor->dr_hw == dr_hw | |
300 | && itor->dr_sw == dr_sw) | |
301 | return itor; | |
302 | itor = itor->next; | |
303 | } | |
304 | return NULL; | |
305 | } | |
306 | ||
307 | struct nubus_dev* | |
308 | nubus_find_type(unsigned short category, | |
309 | unsigned short type, | |
310 | const struct nubus_dev* from) | |
311 | { | |
312 | struct nubus_dev* itor = | |
313 | from ? from->next : nubus_devices; | |
314 | ||
315 | while (itor) { | |
316 | if (itor->category == category | |
317 | && itor->type == type) | |
318 | return itor; | |
319 | itor = itor->next; | |
320 | } | |
321 | return NULL; | |
322 | } | |
323 | ||
324 | struct nubus_dev* | |
325 | nubus_find_slot(unsigned int slot, | |
326 | const struct nubus_dev* from) | |
327 | { | |
328 | struct nubus_dev* itor = | |
329 | from ? from->next : nubus_devices; | |
330 | ||
331 | while (itor) { | |
332 | if (itor->board->slot == slot) | |
333 | return itor; | |
334 | itor = itor->next; | |
335 | } | |
336 | return NULL; | |
337 | } | |
338 | ||
339 | int | |
340 | nubus_find_rsrc(struct nubus_dir* dir, unsigned char rsrc_type, | |
341 | struct nubus_dirent* ent) | |
342 | { | |
343 | while (nubus_readdir(dir, ent) != -1) { | |
344 | if (ent->type == rsrc_type) | |
345 | return 0; | |
346 | } | |
347 | return -1; | |
348 | } | |
349 | ||
350 | /* Initialization functions - decide which slots contain stuff worth | |
351 | looking at, and print out lots and lots of information from the | |
352 | resource blocks. */ | |
353 | ||
354 | /* FIXME: A lot of this stuff will eventually be useful after | |
355 | initializaton, for intelligently probing Ethernet and video chips, | |
356 | among other things. The rest of it should go in the /proc code. | |
357 | For now, we just use it to give verbose boot logs. */ | |
358 | ||
359 | static int __init nubus_show_display_resource(struct nubus_dev* dev, | |
360 | const struct nubus_dirent* ent) | |
361 | { | |
362 | switch (ent->type) { | |
363 | case NUBUS_RESID_GAMMADIR: | |
364 | printk(KERN_INFO " gamma directory offset: 0x%06x\n", ent->data); | |
365 | break; | |
366 | case 0x0080 ... 0x0085: | |
367 | printk(KERN_INFO " mode %02X info offset: 0x%06x\n", | |
368 | ent->type, ent->data); | |
369 | break; | |
370 | default: | |
371 | printk(KERN_INFO " unknown resource %02X, data 0x%06x\n", | |
372 | ent->type, ent->data); | |
373 | } | |
374 | return 0; | |
375 | } | |
376 | ||
377 | static int __init nubus_show_network_resource(struct nubus_dev* dev, | |
378 | const struct nubus_dirent* ent) | |
379 | { | |
380 | switch (ent->type) { | |
381 | case NUBUS_RESID_MAC_ADDRESS: | |
382 | { | |
383 | char addr[6]; | |
384 | int i; | |
385 | ||
386 | nubus_get_rsrc_mem(addr, ent, 6); | |
387 | printk(KERN_INFO " MAC address: "); | |
388 | for (i = 0; i < 6; i++) | |
389 | printk("%02x%s", addr[i] & 0xff, | |
390 | i == 5 ? "" : ":"); | |
391 | printk("\n"); | |
392 | break; | |
393 | } | |
394 | default: | |
395 | printk(KERN_INFO " unknown resource %02X, data 0x%06x\n", | |
396 | ent->type, ent->data); | |
397 | } | |
398 | return 0; | |
399 | } | |
400 | ||
401 | static int __init nubus_show_cpu_resource(struct nubus_dev* dev, | |
402 | const struct nubus_dirent* ent) | |
403 | { | |
404 | switch (ent->type) { | |
405 | case NUBUS_RESID_MEMINFO: | |
406 | { | |
407 | unsigned long meminfo[2]; | |
408 | nubus_get_rsrc_mem(&meminfo, ent, 8); | |
409 | printk(KERN_INFO " memory: [ 0x%08lx 0x%08lx ]\n", | |
410 | meminfo[0], meminfo[1]); | |
411 | break; | |
412 | } | |
413 | case NUBUS_RESID_ROMINFO: | |
414 | { | |
415 | unsigned long rominfo[2]; | |
416 | nubus_get_rsrc_mem(&rominfo, ent, 8); | |
417 | printk(KERN_INFO " ROM: [ 0x%08lx 0x%08lx ]\n", | |
418 | rominfo[0], rominfo[1]); | |
419 | break; | |
420 | } | |
421 | default: | |
422 | printk(KERN_INFO " unknown resource %02X, data 0x%06x\n", | |
423 | ent->type, ent->data); | |
424 | } | |
425 | return 0; | |
426 | } | |
427 | ||
428 | static int __init nubus_show_private_resource(struct nubus_dev* dev, | |
429 | const struct nubus_dirent* ent) | |
430 | { | |
431 | switch (dev->category) { | |
432 | case NUBUS_CAT_DISPLAY: | |
433 | nubus_show_display_resource(dev, ent); | |
434 | break; | |
435 | case NUBUS_CAT_NETWORK: | |
436 | nubus_show_network_resource(dev, ent); | |
437 | break; | |
438 | case NUBUS_CAT_CPU: | |
439 | nubus_show_cpu_resource(dev, ent); | |
440 | break; | |
441 | default: | |
442 | printk(KERN_INFO " unknown resource %02X, data 0x%06x\n", | |
443 | ent->type, ent->data); | |
444 | } | |
445 | return 0; | |
446 | } | |
447 | ||
448 | static struct nubus_dev* __init | |
449 | nubus_get_functional_resource(struct nubus_board* board, | |
450 | int slot, | |
451 | const struct nubus_dirent* parent) | |
452 | { | |
453 | struct nubus_dir dir; | |
454 | struct nubus_dirent ent; | |
455 | struct nubus_dev* dev; | |
456 | ||
457 | printk(KERN_INFO " Function 0x%02x:\n", parent->type); | |
458 | nubus_get_subdir(parent, &dir); | |
459 | ||
460 | /* Apple seems to have botched the ROM on the IIx */ | |
461 | if (slot == 0 && (unsigned long)dir.base % 2) | |
462 | dir.base += 1; | |
463 | ||
464 | if (console_loglevel >= 10) | |
465 | printk(KERN_DEBUG "nubus_get_functional_resource: parent is 0x%p, dir is 0x%p\n", | |
466 | parent->base, dir.base); | |
467 | ||
468 | /* Actually we should probably panic if this fails */ | |
469 | if ((dev = kmalloc(sizeof(*dev), GFP_ATOMIC)) == NULL) | |
470 | return NULL; | |
471 | memset(dev, 0, sizeof(*dev)); | |
472 | dev->resid = parent->type; | |
473 | dev->directory = dir.base; | |
474 | dev->board = board; | |
475 | ||
476 | while (nubus_readdir(&dir, &ent) != -1) | |
477 | { | |
478 | switch(ent.type) | |
479 | { | |
480 | case NUBUS_RESID_TYPE: | |
481 | { | |
482 | unsigned short nbtdata[4]; | |
483 | nubus_get_rsrc_mem(nbtdata, &ent, 8); | |
484 | dev->category = nbtdata[0]; | |
485 | dev->type = nbtdata[1]; | |
486 | dev->dr_sw = nbtdata[2]; | |
487 | dev->dr_hw = nbtdata[3]; | |
488 | printk(KERN_INFO " type: [cat 0x%x type 0x%x hw 0x%x sw 0x%x]\n", | |
489 | nbtdata[0], nbtdata[1], nbtdata[2], nbtdata[3]); | |
490 | break; | |
491 | } | |
492 | case NUBUS_RESID_NAME: | |
493 | { | |
494 | nubus_get_rsrc_str(dev->name, &ent, 64); | |
495 | printk(KERN_INFO " name: %s\n", dev->name); | |
496 | break; | |
497 | } | |
498 | case NUBUS_RESID_DRVRDIR: | |
499 | { | |
500 | /* MacOS driver. If we were NetBSD we might | |
501 | use this :-) */ | |
502 | struct nubus_dir drvr_dir; | |
503 | struct nubus_dirent drvr_ent; | |
504 | nubus_get_subdir(&ent, &drvr_dir); | |
505 | nubus_readdir(&drvr_dir, &drvr_ent); | |
506 | dev->driver = nubus_dirptr(&drvr_ent); | |
507 | printk(KERN_INFO " driver at: 0x%p\n", | |
508 | dev->driver); | |
509 | break; | |
510 | } | |
511 | case NUBUS_RESID_MINOR_BASEOS: | |
512 | /* We will need this in order to support | |
513 | multiple framebuffers. It might be handy | |
514 | for Ethernet as well */ | |
515 | nubus_get_rsrc_mem(&dev->iobase, &ent, 4); | |
516 | printk(KERN_INFO " memory offset: 0x%08lx\n", | |
517 | dev->iobase); | |
518 | break; | |
519 | case NUBUS_RESID_MINOR_LENGTH: | |
520 | /* Ditto */ | |
521 | nubus_get_rsrc_mem(&dev->iosize, &ent, 4); | |
522 | printk(KERN_INFO " memory length: 0x%08lx\n", | |
523 | dev->iosize); | |
524 | break; | |
525 | case NUBUS_RESID_FLAGS: | |
526 | dev->flags = ent.data; | |
527 | printk(KERN_INFO " flags: 0x%06x\n", dev->flags); | |
528 | break; | |
529 | case NUBUS_RESID_HWDEVID: | |
530 | dev->hwdevid = ent.data; | |
531 | printk(KERN_INFO " hwdevid: 0x%06x\n", dev->hwdevid); | |
532 | break; | |
533 | default: | |
534 | /* Local/Private resources have their own | |
535 | function */ | |
536 | nubus_show_private_resource(dev, &ent); | |
537 | } | |
538 | } | |
539 | ||
540 | return dev; | |
541 | } | |
542 | ||
543 | /* This is cool. */ | |
544 | static int __init nubus_get_vidnames(struct nubus_board* board, | |
545 | const struct nubus_dirent* parent) | |
546 | { | |
547 | struct nubus_dir dir; | |
548 | struct nubus_dirent ent; | |
549 | /* FIXME: obviously we want to put this in a header file soon */ | |
550 | struct vidmode { | |
551 | u32 size; | |
552 | /* Don't know what this is yet */ | |
553 | u16 id; | |
554 | /* Longest one I've seen so far is 26 characters */ | |
555 | char name[32]; | |
556 | }; | |
557 | ||
558 | printk(KERN_INFO " video modes supported:\n"); | |
559 | nubus_get_subdir(parent, &dir); | |
560 | if (console_loglevel >= 10) | |
561 | printk(KERN_DEBUG "nubus_get_vidnames: parent is 0x%p, dir is 0x%p\n", | |
562 | parent->base, dir.base); | |
563 | ||
564 | while(nubus_readdir(&dir, &ent) != -1) | |
565 | { | |
566 | struct vidmode mode; | |
567 | u32 size; | |
568 | ||
569 | /* First get the length */ | |
570 | nubus_get_rsrc_mem(&size, &ent, 4); | |
571 | ||
572 | /* Now clobber the whole thing */ | |
573 | if (size > sizeof(mode) - 1) | |
574 | size = sizeof(mode) - 1; | |
575 | memset(&mode, 0, sizeof(mode)); | |
576 | nubus_get_rsrc_mem(&mode, &ent, size); | |
577 | printk (KERN_INFO " %02X: (%02X) %s\n", ent.type, | |
578 | mode.id, mode.name); | |
579 | } | |
580 | return 0; | |
581 | } | |
582 | ||
583 | /* This is *really* cool. */ | |
584 | static int __init nubus_get_icon(struct nubus_board* board, | |
585 | const struct nubus_dirent* ent) | |
586 | { | |
587 | /* Should be 32x32 if my memory serves me correctly */ | |
588 | unsigned char icon[128]; | |
589 | int x, y; | |
590 | ||
591 | nubus_get_rsrc_mem(&icon, ent, 128); | |
592 | printk(KERN_INFO " icon:\n"); | |
593 | ||
594 | /* We should actually plot these somewhere in the framebuffer | |
595 | init. This is just to demonstrate that they do, in fact, | |
596 | exist */ | |
597 | for (y = 0; y < 32; y++) { | |
598 | printk(KERN_INFO " "); | |
599 | for (x = 0; x < 32; x++) { | |
600 | if (icon[y*4 + x/8] | |
601 | & (0x80 >> (x%8))) | |
602 | printk("*"); | |
603 | else | |
604 | printk(" "); | |
605 | } | |
606 | printk("\n"); | |
607 | } | |
608 | return 0; | |
609 | } | |
610 | ||
611 | static int __init nubus_get_vendorinfo(struct nubus_board* board, | |
612 | const struct nubus_dirent* parent) | |
613 | { | |
614 | struct nubus_dir dir; | |
615 | struct nubus_dirent ent; | |
616 | static char* vendor_fields[6] = {"ID", "serial", "revision", | |
617 | "part", "date", "unknown field"}; | |
618 | ||
619 | printk(KERN_INFO " vendor info:\n"); | |
620 | nubus_get_subdir(parent, &dir); | |
621 | if (console_loglevel >= 10) | |
622 | printk(KERN_DEBUG "nubus_get_vendorinfo: parent is 0x%p, dir is 0x%p\n", | |
623 | parent->base, dir.base); | |
624 | ||
625 | while(nubus_readdir(&dir, &ent) != -1) | |
626 | { | |
627 | char name[64]; | |
628 | ||
629 | /* These are all strings, we think */ | |
630 | nubus_get_rsrc_str(name, &ent, 64); | |
631 | if (ent.type > 5) | |
632 | ent.type = 5; | |
633 | printk(KERN_INFO " %s: %s\n", | |
634 | vendor_fields[ent.type-1], name); | |
635 | } | |
636 | return 0; | |
637 | } | |
638 | ||
639 | static int __init nubus_get_board_resource(struct nubus_board* board, int slot, | |
640 | const struct nubus_dirent* parent) | |
641 | { | |
642 | struct nubus_dir dir; | |
643 | struct nubus_dirent ent; | |
644 | ||
645 | nubus_get_subdir(parent, &dir); | |
646 | if (console_loglevel >= 10) | |
647 | printk(KERN_DEBUG "nubus_get_board_resource: parent is 0x%p, dir is 0x%p\n", | |
648 | parent->base, dir.base); | |
649 | ||
650 | while(nubus_readdir(&dir, &ent) != -1) | |
651 | { | |
652 | switch (ent.type) { | |
653 | case NUBUS_RESID_TYPE: | |
654 | { | |
655 | unsigned short nbtdata[4]; | |
656 | /* This type is always the same, and is not | |
657 | useful except insofar as it tells us that | |
658 | we really are looking at a board resource. */ | |
659 | nubus_get_rsrc_mem(nbtdata, &ent, 8); | |
660 | printk(KERN_INFO " type: [cat 0x%x type 0x%x hw 0x%x sw 0x%x]\n", | |
661 | nbtdata[0], nbtdata[1], nbtdata[2], | |
662 | nbtdata[3]); | |
663 | if (nbtdata[0] != 1 || nbtdata[1] != 0 || | |
664 | nbtdata[2] != 0 || nbtdata[3] != 0) | |
665 | printk(KERN_ERR "this sResource is not a board resource!\n"); | |
666 | break; | |
667 | } | |
668 | case NUBUS_RESID_NAME: | |
669 | nubus_get_rsrc_str(board->name, &ent, 64); | |
670 | printk(KERN_INFO " name: %s\n", board->name); | |
671 | break; | |
672 | case NUBUS_RESID_ICON: | |
673 | nubus_get_icon(board, &ent); | |
674 | break; | |
675 | case NUBUS_RESID_BOARDID: | |
676 | printk(KERN_INFO " board id: 0x%x\n", ent.data); | |
677 | break; | |
678 | case NUBUS_RESID_PRIMARYINIT: | |
679 | printk(KERN_INFO " primary init offset: 0x%06x\n", ent.data); | |
680 | break; | |
681 | case NUBUS_RESID_VENDORINFO: | |
682 | nubus_get_vendorinfo(board, &ent); | |
683 | break; | |
684 | case NUBUS_RESID_FLAGS: | |
685 | printk(KERN_INFO " flags: 0x%06x\n", ent.data); | |
686 | break; | |
687 | case NUBUS_RESID_HWDEVID: | |
688 | printk(KERN_INFO " hwdevid: 0x%06x\n", ent.data); | |
689 | break; | |
690 | case NUBUS_RESID_SECONDINIT: | |
691 | printk(KERN_INFO " secondary init offset: 0x%06x\n", ent.data); | |
692 | break; | |
693 | /* WTF isn't this in the functional resources? */ | |
694 | case NUBUS_RESID_VIDNAMES: | |
695 | nubus_get_vidnames(board, &ent); | |
696 | break; | |
697 | /* Same goes for this */ | |
698 | case NUBUS_RESID_VIDMODES: | |
699 | printk(KERN_INFO " video mode parameter directory offset: 0x%06x\n", | |
700 | ent.data); | |
701 | break; | |
702 | default: | |
703 | printk(KERN_INFO " unknown resource %02X, data 0x%06x\n", | |
704 | ent.type, ent.data); | |
705 | } | |
706 | } | |
707 | return 0; | |
708 | } | |
709 | ||
710 | /* Attempt to bypass the somewhat non-obvious arrangement of | |
711 | sResources in the motherboard ROM */ | |
712 | static void __init nubus_find_rom_dir(struct nubus_board* board) | |
713 | { | |
714 | unsigned char* rp; | |
715 | unsigned char* romdir; | |
716 | struct nubus_dir dir; | |
717 | struct nubus_dirent ent; | |
718 | ||
719 | /* Check for the extra directory just under the format block */ | |
720 | rp = board->fblock; | |
721 | nubus_rewind(&rp, 4, board->lanes); | |
722 | if (nubus_get_rom(&rp, 4, board->lanes) != NUBUS_TEST_PATTERN) { | |
723 | /* OK, the ROM was telling the truth */ | |
724 | board->directory = board->fblock; | |
725 | nubus_move(&board->directory, | |
726 | nubus_expand32(board->doffset), | |
727 | board->lanes); | |
728 | return; | |
729 | } | |
730 | ||
731 | /* On "slot zero", you have to walk down a few more | |
732 | directories to get to the equivalent of a real card's root | |
733 | directory. We don't know what they were smoking when they | |
734 | came up with this. */ | |
735 | romdir = nubus_rom_addr(board->slot); | |
736 | nubus_rewind(&romdir, ROM_DIR_OFFSET, board->lanes); | |
737 | dir.base = dir.ptr = romdir; | |
738 | dir.done = 0; | |
739 | dir.mask = board->lanes; | |
740 | ||
741 | /* This one points to an "Unknown Macintosh" directory */ | |
742 | if (nubus_readdir(&dir, &ent) == -1) | |
743 | goto badrom; | |
744 | ||
745 | if (console_loglevel >= 10) | |
746 | printk(KERN_INFO "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data); | |
747 | /* This one takes us to where we want to go. */ | |
748 | if (nubus_readdir(&dir, &ent) == -1) | |
749 | goto badrom; | |
750 | if (console_loglevel >= 10) | |
751 | printk(KERN_DEBUG "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data); | |
752 | nubus_get_subdir(&ent, &dir); | |
753 | ||
754 | /* Resource ID 01, also an "Unknown Macintosh" */ | |
755 | if (nubus_readdir(&dir, &ent) == -1) | |
756 | goto badrom; | |
757 | if (console_loglevel >= 10) | |
758 | printk(KERN_DEBUG "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data); | |
759 | ||
760 | /* FIXME: the first one is *not* always the right one. We | |
761 | suspect this has something to do with the ROM revision. | |
762 | "The HORROR ROM" (LC-series) uses 0x7e, while "The HORROR | |
763 | Continues" (Q630) uses 0x7b. The DAFB Macs evidently use | |
764 | something else. Please run "Slots" on your Mac (see | |
765 | include/linux/nubus.h for where to get this program) and | |
766 | tell us where the 'SiDirPtr' for Slot 0 is. If you feel | |
767 | brave, you should also use MacsBug to walk down the ROM | |
768 | directories like this function does and try to find the | |
769 | path to that address... */ | |
770 | if (nubus_readdir(&dir, &ent) == -1) | |
771 | goto badrom; | |
772 | if (console_loglevel >= 10) | |
773 | printk(KERN_DEBUG "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data); | |
774 | ||
775 | /* Bwahahahaha... */ | |
776 | nubus_get_subdir(&ent, &dir); | |
777 | board->directory = dir.base; | |
778 | return; | |
779 | ||
780 | /* Even more evil laughter... */ | |
781 | badrom: | |
782 | board->directory = board->fblock; | |
783 | nubus_move(&board->directory, nubus_expand32(board->doffset), board->lanes); | |
784 | printk(KERN_ERR "nubus_get_rom_dir: ROM weirdness! Notify the developers...\n"); | |
785 | } | |
786 | ||
787 | /* Add a board (might be many devices) to the list */ | |
788 | static struct nubus_board* __init nubus_add_board(int slot, int bytelanes) | |
789 | { | |
790 | struct nubus_board* board; | |
791 | struct nubus_board** boardp; | |
792 | ||
793 | unsigned char *rp; | |
794 | unsigned long dpat; | |
795 | struct nubus_dir dir; | |
796 | struct nubus_dirent ent; | |
797 | ||
798 | /* Move to the start of the format block */ | |
799 | rp = nubus_rom_addr(slot); | |
800 | nubus_rewind(&rp, FORMAT_BLOCK_SIZE, bytelanes); | |
801 | ||
802 | /* Actually we should probably panic if this fails */ | |
803 | if ((board = kmalloc(sizeof(*board), GFP_ATOMIC)) == NULL) | |
804 | return NULL; | |
805 | memset(board, 0, sizeof(*board)); | |
806 | board->fblock = rp; | |
807 | ||
808 | /* Dump the format block for debugging purposes */ | |
809 | if (console_loglevel >= 10) { | |
810 | int i; | |
811 | printk(KERN_DEBUG "Slot %X, format block at 0x%p\n", | |
812 | slot, rp); | |
813 | printk(KERN_DEBUG "Format block: "); | |
814 | for (i = 0; i < FORMAT_BLOCK_SIZE; i += 4) { | |
815 | unsigned short foo, bar; | |
816 | foo = nubus_get_rom(&rp, 2, bytelanes); | |
817 | bar = nubus_get_rom(&rp, 2, bytelanes); | |
818 | printk("%04x %04x ", foo, bar); | |
819 | } | |
820 | printk("\n"); | |
821 | rp = board->fblock; | |
822 | } | |
823 | ||
824 | board->slot = slot; | |
825 | board->slot_addr = (unsigned long) nubus_slot_addr(slot); | |
826 | board->doffset = nubus_get_rom(&rp, 4, bytelanes); | |
827 | /* rom_length is *supposed* to be the total length of the | |
828 | * ROM. In practice it is the "amount of ROM used to compute | |
829 | * the CRC." So some jokers decide to set it to zero and | |
830 | * set the crc to zero so they don't have to do any math. | |
831 | * See the Performa 460 ROM, for example. Those Apple "engineers". | |
832 | */ | |
833 | board->rom_length = nubus_get_rom(&rp, 4, bytelanes); | |
834 | board->crc = nubus_get_rom(&rp, 4, bytelanes); | |
835 | board->rev = nubus_get_rom(&rp, 1, bytelanes); | |
836 | board->format = nubus_get_rom(&rp,1, bytelanes); | |
837 | board->lanes = bytelanes; | |
838 | ||
839 | /* Directory offset should be small and negative... */ | |
840 | if(!(board->doffset & 0x00FF0000)) | |
841 | printk(KERN_WARNING "Dodgy doffset!\n"); | |
842 | dpat = nubus_get_rom(&rp, 4, bytelanes); | |
843 | if(dpat != NUBUS_TEST_PATTERN) | |
844 | printk(KERN_WARNING "Wrong test pattern %08lx!\n", dpat); | |
845 | ||
846 | /* | |
847 | * I wonder how the CRC is meant to work - | |
848 | * any takers ? | |
849 | * CSA: According to MAC docs, not all cards pass the CRC anyway, | |
850 | * since the initial Macintosh ROM releases skipped the check. | |
851 | */ | |
852 | ||
853 | /* Attempt to work around slot zero weirdness */ | |
854 | nubus_find_rom_dir(board); | |
855 | nubus_get_root_dir(board, &dir); | |
856 | ||
857 | /* We're ready to rock */ | |
858 | printk(KERN_INFO "Slot %X:\n", slot); | |
859 | ||
860 | /* Each slot should have one board resource and any number of | |
861 | functional resources. So we'll fill in some fields in the | |
862 | struct nubus_board from the board resource, then walk down | |
863 | the list of functional resources, spinning out a nubus_dev | |
864 | for each of them. */ | |
865 | if (nubus_readdir(&dir, &ent) == -1) { | |
866 | /* We can't have this! */ | |
867 | printk(KERN_ERR "Board resource not found!\n"); | |
868 | return NULL; | |
869 | } else { | |
870 | printk(KERN_INFO " Board resource:\n"); | |
871 | nubus_get_board_resource(board, slot, &ent); | |
872 | } | |
873 | ||
874 | /* Aaaarrrrgghh! The LC III motherboard has *two* board | |
875 | resources. I have no idea WTF to do about this. */ | |
876 | ||
877 | while (nubus_readdir(&dir, &ent) != -1) { | |
878 | struct nubus_dev* dev; | |
879 | struct nubus_dev** devp; | |
880 | dev = nubus_get_functional_resource(board, slot, &ent); | |
881 | if (dev == NULL) | |
882 | continue; | |
883 | ||
884 | /* We zeroed this out above */ | |
885 | if (board->first_dev == NULL) | |
886 | board->first_dev = dev; | |
887 | ||
888 | /* Put it on the global NuBus device chain. Keep entries in order. */ | |
889 | for (devp=&nubus_devices; *devp!=NULL; devp=&((*devp)->next)) | |
890 | /* spin */; | |
891 | *devp = dev; | |
892 | dev->next = NULL; | |
893 | } | |
894 | ||
895 | /* Put it on the global NuBus board chain. Keep entries in order. */ | |
896 | for (boardp=&nubus_boards; *boardp!=NULL; boardp=&((*boardp)->next)) | |
897 | /* spin */; | |
898 | *boardp = board; | |
899 | board->next = NULL; | |
900 | ||
901 | return board; | |
902 | } | |
903 | ||
904 | void __init nubus_probe_slot(int slot) | |
905 | { | |
906 | unsigned char dp; | |
907 | unsigned char* rp; | |
908 | int i; | |
909 | ||
910 | rp = nubus_rom_addr(slot); | |
911 | for(i = 4; i; i--) | |
912 | { | |
913 | unsigned long flags; | |
914 | int card_present; | |
915 | ||
916 | rp--; | |
917 | local_irq_save(flags); | |
918 | card_present = hwreg_present(rp); | |
919 | local_irq_restore(flags); | |
920 | ||
921 | if (!card_present) | |
922 | continue; | |
923 | ||
924 | printk(KERN_DEBUG "Now probing slot %X at %p\n", slot, rp); | |
925 | dp = *rp; | |
926 | if(dp == 0) | |
927 | continue; | |
928 | ||
929 | /* The last byte of the format block consists of two | |
930 | nybbles which are "mirror images" of each other. | |
931 | These show us the valid bytelanes */ | |
932 | if ((((dp>>4) ^ dp) & 0x0F) != 0x0F) | |
933 | continue; | |
934 | /* Check that this value is actually *on* one of the | |
935 | bytelanes it claims are valid! */ | |
936 | if ((dp & 0x0F) >= (1<<i)) | |
937 | continue; | |
938 | ||
939 | /* Looks promising. Let's put it on the list. */ | |
940 | nubus_add_board(slot, dp); | |
941 | ||
942 | return; | |
943 | } | |
944 | } | |
945 | ||
946 | #if defined(CONFIG_PROC_FS) | |
947 | ||
948 | /* /proc/nubus stuff */ | |
949 | ||
950 | static int sprint_nubus_board(struct nubus_board* board, char* ptr, int len) | |
951 | { | |
952 | if(len < 100) | |
953 | return -1; | |
954 | ||
955 | sprintf(ptr, "Slot %X: %s\n", | |
956 | board->slot, board->name); | |
957 | ||
958 | return strlen(ptr); | |
959 | } | |
960 | ||
961 | static int nubus_read_proc(char *page, char **start, off_t off, | |
962 | int count, int *eof, void *data) | |
963 | { | |
964 | int nprinted, len, begin = 0; | |
965 | int size = PAGE_SIZE; | |
966 | struct nubus_board* board; | |
967 | ||
968 | len = sprintf(page, "Nubus devices found:\n"); | |
969 | /* Walk the list of NuBus boards */ | |
970 | for (board = nubus_boards; board != NULL; board = board->next) | |
971 | { | |
972 | nprinted = sprint_nubus_board(board, page + len, size - len); | |
973 | if (nprinted < 0) | |
974 | break; | |
975 | len += nprinted; | |
976 | if (len+begin < off) { | |
977 | begin += len; | |
978 | len = 0; | |
979 | } | |
980 | if (len+begin >= off+count) | |
981 | break; | |
982 | } | |
983 | if (len+begin < off) | |
984 | *eof = 1; | |
985 | off -= begin; | |
986 | *start = page + off; | |
987 | len -= off; | |
988 | if (len>count) | |
989 | len = count; | |
990 | if (len<0) | |
991 | len = 0; | |
992 | return len; | |
993 | } | |
994 | #endif | |
995 | ||
996 | void __init nubus_scan_bus(void) | |
997 | { | |
998 | int slot; | |
999 | /* This might not work on your machine */ | |
1000 | #ifdef I_WANT_TO_PROBE_SLOT_ZERO | |
1001 | nubus_probe_slot(0); | |
1002 | #endif | |
1003 | for(slot = 9; slot < 15; slot++) | |
1004 | { | |
1005 | nubus_probe_slot(slot); | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | static int __init nubus_init(void) | |
1010 | { | |
1011 | if (!MACH_IS_MAC) | |
1012 | return 0; | |
1013 | ||
1014 | /* Initialize the NuBus interrupts */ | |
1015 | if (oss_present) { | |
1016 | oss_nubus_init(); | |
1017 | } else { | |
1018 | via_nubus_init(); | |
1019 | } | |
1020 | ||
1021 | #ifdef TRY_TO_DODGE_WSOD | |
1022 | /* Rogue Ethernet interrupts can kill the machine if we don't | |
1023 | do this. Obviously this is bogus. Hopefully the local VIA | |
1024 | gurus can fix the real cause of the problem. */ | |
1025 | mdelay(1000); | |
1026 | #endif | |
1027 | ||
1028 | /* And probe */ | |
1029 | printk("NuBus: Scanning NuBus slots.\n"); | |
1030 | nubus_devices = NULL; | |
1031 | nubus_boards = NULL; | |
1032 | nubus_scan_bus(); | |
1033 | ||
1034 | #ifdef CONFIG_PROC_FS | |
1035 | create_proc_read_entry("nubus", 0, NULL, nubus_read_proc, NULL); | |
1036 | nubus_proc_init(); | |
1037 | #endif | |
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | subsys_initcall(nubus_init); |