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