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a2bd4fd1 DM |
1 | #include <linux/string.h> |
2 | #include <linux/kernel.h> | |
f85ff305 | 3 | #include <linux/of.h> |
a2bd4fd1 DM |
4 | #include <linux/init.h> |
5 | #include <linux/module.h> | |
6 | #include <linux/mod_devicetable.h> | |
7 | #include <linux/slab.h> | |
8 | ||
9 | #include <asm/errno.h> | |
10 | #include <asm/of_device.h> | |
11 | ||
a2bd4fd1 DM |
12 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) |
13 | { | |
14 | struct of_device * of_dev = to_of_device(dev); | |
15 | struct of_platform_driver * of_drv = to_of_platform_driver(drv); | |
16 | const struct of_device_id * matches = of_drv->match_table; | |
17 | ||
18 | if (!matches) | |
19 | return 0; | |
20 | ||
21 | return of_match_device(matches, of_dev) != NULL; | |
22 | } | |
23 | ||
37b7754a | 24 | static int of_platform_device_probe(struct device *dev) |
a2bd4fd1 DM |
25 | { |
26 | int error = -ENODEV; | |
27 | struct of_platform_driver *drv; | |
28 | struct of_device *of_dev; | |
29 | const struct of_device_id *match; | |
30 | ||
31 | drv = to_of_platform_driver(dev->driver); | |
32 | of_dev = to_of_device(dev); | |
33 | ||
34 | if (!drv->probe) | |
35 | return error; | |
36 | ||
37 | of_dev_get(of_dev); | |
38 | ||
39 | match = of_match_device(drv->match_table, of_dev); | |
40 | if (match) | |
41 | error = drv->probe(of_dev, match); | |
42 | if (error) | |
43 | of_dev_put(of_dev); | |
44 | ||
45 | return error; | |
46 | } | |
47 | ||
37b7754a | 48 | static int of_platform_device_remove(struct device *dev) |
a2bd4fd1 DM |
49 | { |
50 | struct of_device * of_dev = to_of_device(dev); | |
51 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
52 | ||
53 | if (dev->driver && drv->remove) | |
54 | drv->remove(of_dev); | |
55 | return 0; | |
56 | } | |
57 | ||
37b7754a | 58 | static int of_platform_device_suspend(struct device *dev, pm_message_t state) |
a2bd4fd1 DM |
59 | { |
60 | struct of_device * of_dev = to_of_device(dev); | |
61 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
62 | int error = 0; | |
63 | ||
64 | if (dev->driver && drv->suspend) | |
65 | error = drv->suspend(of_dev, state); | |
66 | return error; | |
67 | } | |
68 | ||
37b7754a | 69 | static int of_platform_device_resume(struct device * dev) |
a2bd4fd1 DM |
70 | { |
71 | struct of_device * of_dev = to_of_device(dev); | |
72 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
73 | int error = 0; | |
74 | ||
75 | if (dev->driver && drv->resume) | |
76 | error = drv->resume(of_dev); | |
77 | return error; | |
78 | } | |
79 | ||
3ca9fab4 DM |
80 | void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name) |
81 | { | |
82 | unsigned long ret = res->start + offset; | |
6bda5736 | 83 | struct resource *r; |
3ca9fab4 | 84 | |
6bda5736 DM |
85 | if (res->flags & IORESOURCE_MEM) |
86 | r = request_mem_region(ret, size, name); | |
87 | else | |
88 | r = request_region(ret, size, name); | |
89 | if (!r) | |
3ca9fab4 DM |
90 | ret = 0; |
91 | ||
92 | return (void __iomem *) ret; | |
93 | } | |
94 | EXPORT_SYMBOL(of_ioremap); | |
95 | ||
e3a411a3 | 96 | void of_iounmap(struct resource *res, void __iomem *base, unsigned long size) |
3ca9fab4 | 97 | { |
e3a411a3 DM |
98 | if (res->flags & IORESOURCE_MEM) |
99 | release_mem_region((unsigned long) base, size); | |
100 | else | |
101 | release_region((unsigned long) base, size); | |
3ca9fab4 DM |
102 | } |
103 | EXPORT_SYMBOL(of_iounmap); | |
104 | ||
2b1e5978 DM |
105 | static int node_match(struct device *dev, void *data) |
106 | { | |
107 | struct of_device *op = to_of_device(dev); | |
108 | struct device_node *dp = data; | |
109 | ||
110 | return (op->node == dp); | |
111 | } | |
112 | ||
113 | struct of_device *of_find_device_by_node(struct device_node *dp) | |
114 | { | |
37b7754a | 115 | struct device *dev = bus_find_device(&of_platform_bus_type, NULL, |
2b1e5978 DM |
116 | dp, node_match); |
117 | ||
118 | if (dev) | |
119 | return to_of_device(dev); | |
120 | ||
121 | return NULL; | |
122 | } | |
123 | EXPORT_SYMBOL(of_find_device_by_node); | |
124 | ||
a2bd4fd1 DM |
125 | #ifdef CONFIG_PCI |
126 | struct bus_type isa_bus_type = { | |
127 | .name = "isa", | |
128 | .match = of_platform_bus_match, | |
37b7754a SR |
129 | .probe = of_platform_device_probe, |
130 | .remove = of_platform_device_remove, | |
131 | .suspend = of_platform_device_suspend, | |
132 | .resume = of_platform_device_resume, | |
a2bd4fd1 | 133 | }; |
69853918 | 134 | EXPORT_SYMBOL(isa_bus_type); |
a2bd4fd1 DM |
135 | |
136 | struct bus_type ebus_bus_type = { | |
137 | .name = "ebus", | |
138 | .match = of_platform_bus_match, | |
37b7754a SR |
139 | .probe = of_platform_device_probe, |
140 | .remove = of_platform_device_remove, | |
141 | .suspend = of_platform_device_suspend, | |
142 | .resume = of_platform_device_resume, | |
a2bd4fd1 | 143 | }; |
69853918 | 144 | EXPORT_SYMBOL(ebus_bus_type); |
a2bd4fd1 DM |
145 | #endif |
146 | ||
147 | #ifdef CONFIG_SBUS | |
148 | struct bus_type sbus_bus_type = { | |
149 | .name = "sbus", | |
150 | .match = of_platform_bus_match, | |
37b7754a SR |
151 | .probe = of_platform_device_probe, |
152 | .remove = of_platform_device_remove, | |
153 | .suspend = of_platform_device_suspend, | |
154 | .resume = of_platform_device_resume, | |
a2bd4fd1 | 155 | }; |
69853918 | 156 | EXPORT_SYMBOL(sbus_bus_type); |
a2bd4fd1 DM |
157 | #endif |
158 | ||
37b7754a | 159 | struct bus_type of_platform_bus_type = { |
cf44bbc2 DM |
160 | .name = "of", |
161 | .match = of_platform_bus_match, | |
37b7754a SR |
162 | .probe = of_platform_device_probe, |
163 | .remove = of_platform_device_remove, | |
164 | .suspend = of_platform_device_suspend, | |
165 | .resume = of_platform_device_resume, | |
cf44bbc2 | 166 | }; |
37b7754a | 167 | EXPORT_SYMBOL(of_platform_bus_type); |
cf44bbc2 | 168 | |
a83f9823 | 169 | static inline u64 of_read_addr(const u32 *cell, int size) |
cf44bbc2 DM |
170 | { |
171 | u64 r = 0; | |
172 | while (size--) | |
173 | r = (r << 32) | *(cell++); | |
174 | return r; | |
175 | } | |
176 | ||
177 | static void __init get_cells(struct device_node *dp, | |
178 | int *addrc, int *sizec) | |
179 | { | |
180 | if (addrc) | |
181 | *addrc = of_n_addr_cells(dp); | |
182 | if (sizec) | |
183 | *sizec = of_n_size_cells(dp); | |
184 | } | |
185 | ||
186 | /* Max address size we deal with */ | |
187 | #define OF_MAX_ADDR_CELLS 4 | |
188 | ||
189 | struct of_bus { | |
190 | const char *name; | |
191 | const char *addr_prop_name; | |
192 | int (*match)(struct device_node *parent); | |
193 | void (*count_cells)(struct device_node *child, | |
194 | int *addrc, int *sizec); | |
a83f9823 DM |
195 | int (*map)(u32 *addr, const u32 *range, |
196 | int na, int ns, int pna); | |
6a23acf3 | 197 | unsigned int (*get_flags)(const u32 *addr); |
cf44bbc2 DM |
198 | }; |
199 | ||
200 | /* | |
201 | * Default translator (generic bus) | |
202 | */ | |
203 | ||
204 | static void of_bus_default_count_cells(struct device_node *dev, | |
205 | int *addrc, int *sizec) | |
206 | { | |
207 | get_cells(dev, addrc, sizec); | |
208 | } | |
209 | ||
a83f9823 DM |
210 | /* Make sure the least significant 64-bits are in-range. Even |
211 | * for 3 or 4 cell values it is a good enough approximation. | |
212 | */ | |
213 | static int of_out_of_range(const u32 *addr, const u32 *base, | |
214 | const u32 *size, int na, int ns) | |
cf44bbc2 | 215 | { |
a83f9823 DM |
216 | u64 a = of_read_addr(addr, na); |
217 | u64 b = of_read_addr(base, na); | |
cf44bbc2 | 218 | |
a83f9823 DM |
219 | if (a < b) |
220 | return 1; | |
cf44bbc2 | 221 | |
a83f9823 DM |
222 | b += of_read_addr(size, ns); |
223 | if (a >= b) | |
224 | return 1; | |
225 | ||
226 | return 0; | |
cf44bbc2 DM |
227 | } |
228 | ||
a83f9823 DM |
229 | static int of_bus_default_map(u32 *addr, const u32 *range, |
230 | int na, int ns, int pna) | |
cf44bbc2 | 231 | { |
a83f9823 DM |
232 | u32 result[OF_MAX_ADDR_CELLS]; |
233 | int i; | |
234 | ||
235 | if (ns > 2) { | |
236 | printk("of_device: Cannot handle size cells (%d) > 2.", ns); | |
237 | return -EINVAL; | |
238 | } | |
239 | ||
240 | if (of_out_of_range(addr, range, range + na + pna, na, ns)) | |
241 | return -EINVAL; | |
242 | ||
243 | /* Start with the parent range base. */ | |
244 | memcpy(result, range + na, pna * 4); | |
245 | ||
246 | /* Add in the child address offset. */ | |
247 | for (i = 0; i < na; i++) | |
248 | result[pna - 1 - i] += | |
249 | (addr[na - 1 - i] - | |
250 | range[na - 1 - i]); | |
251 | ||
252 | memcpy(addr, result, pna * 4); | |
cf44bbc2 DM |
253 | |
254 | return 0; | |
255 | } | |
256 | ||
6a23acf3 | 257 | static unsigned int of_bus_default_get_flags(const u32 *addr) |
cf44bbc2 DM |
258 | { |
259 | return IORESOURCE_MEM; | |
260 | } | |
261 | ||
cf44bbc2 DM |
262 | /* |
263 | * PCI bus specific translator | |
264 | */ | |
265 | ||
266 | static int of_bus_pci_match(struct device_node *np) | |
267 | { | |
a83f9823 | 268 | if (!strcmp(np->type, "pci") || !strcmp(np->type, "pciex")) { |
a165b420 | 269 | const char *model = of_get_property(np, "model", NULL); |
01f94c4a DM |
270 | |
271 | if (model && !strcmp(model, "SUNW,simba")) | |
272 | return 0; | |
273 | ||
a83f9823 DM |
274 | /* Do not do PCI specific frobbing if the |
275 | * PCI bridge lacks a ranges property. We | |
276 | * want to pass it through up to the next | |
277 | * parent as-is, not with the PCI translate | |
278 | * method which chops off the top address cell. | |
279 | */ | |
280 | if (!of_find_property(np, "ranges", NULL)) | |
281 | return 0; | |
282 | ||
283 | return 1; | |
284 | } | |
285 | ||
286 | return 0; | |
cf44bbc2 DM |
287 | } |
288 | ||
01f94c4a DM |
289 | static int of_bus_simba_match(struct device_node *np) |
290 | { | |
a165b420 | 291 | const char *model = of_get_property(np, "model", NULL); |
01f94c4a DM |
292 | |
293 | if (model && !strcmp(model, "SUNW,simba")) | |
294 | return 1; | |
8c2786cf DM |
295 | |
296 | /* Treat PCI busses lacking ranges property just like | |
297 | * simba. | |
298 | */ | |
299 | if (!strcmp(np->type, "pci") || !strcmp(np->type, "pciex")) { | |
300 | if (!of_find_property(np, "ranges", NULL)) | |
301 | return 1; | |
302 | } | |
303 | ||
01f94c4a DM |
304 | return 0; |
305 | } | |
306 | ||
307 | static int of_bus_simba_map(u32 *addr, const u32 *range, | |
308 | int na, int ns, int pna) | |
309 | { | |
310 | return 0; | |
311 | } | |
312 | ||
cf44bbc2 DM |
313 | static void of_bus_pci_count_cells(struct device_node *np, |
314 | int *addrc, int *sizec) | |
315 | { | |
316 | if (addrc) | |
317 | *addrc = 3; | |
318 | if (sizec) | |
319 | *sizec = 2; | |
320 | } | |
321 | ||
a83f9823 DM |
322 | static int of_bus_pci_map(u32 *addr, const u32 *range, |
323 | int na, int ns, int pna) | |
cf44bbc2 | 324 | { |
a83f9823 DM |
325 | u32 result[OF_MAX_ADDR_CELLS]; |
326 | int i; | |
cf44bbc2 DM |
327 | |
328 | /* Check address type match */ | |
329 | if ((addr[0] ^ range[0]) & 0x03000000) | |
a83f9823 | 330 | return -EINVAL; |
cf44bbc2 | 331 | |
a83f9823 DM |
332 | if (of_out_of_range(addr + 1, range + 1, range + na + pna, |
333 | na - 1, ns)) | |
334 | return -EINVAL; | |
cf44bbc2 | 335 | |
a83f9823 DM |
336 | /* Start with the parent range base. */ |
337 | memcpy(result, range + na, pna * 4); | |
cf44bbc2 | 338 | |
a83f9823 DM |
339 | /* Add in the child address offset, skipping high cell. */ |
340 | for (i = 0; i < na - 1; i++) | |
341 | result[pna - 1 - i] += | |
342 | (addr[na - 1 - i] - | |
343 | range[na - 1 - i]); | |
344 | ||
345 | memcpy(addr, result, pna * 4); | |
346 | ||
347 | return 0; | |
cf44bbc2 DM |
348 | } |
349 | ||
6a23acf3 | 350 | static unsigned int of_bus_pci_get_flags(const u32 *addr) |
cf44bbc2 DM |
351 | { |
352 | unsigned int flags = 0; | |
353 | u32 w = addr[0]; | |
354 | ||
355 | switch((w >> 24) & 0x03) { | |
356 | case 0x01: | |
357 | flags |= IORESOURCE_IO; | |
358 | case 0x02: /* 32 bits */ | |
359 | case 0x03: /* 64 bits */ | |
360 | flags |= IORESOURCE_MEM; | |
361 | } | |
362 | if (w & 0x40000000) | |
363 | flags |= IORESOURCE_PREFETCH; | |
364 | return flags; | |
365 | } | |
366 | ||
cf44bbc2 DM |
367 | /* |
368 | * SBUS bus specific translator | |
369 | */ | |
370 | ||
371 | static int of_bus_sbus_match(struct device_node *np) | |
372 | { | |
373 | return !strcmp(np->name, "sbus") || | |
374 | !strcmp(np->name, "sbi"); | |
375 | } | |
376 | ||
377 | static void of_bus_sbus_count_cells(struct device_node *child, | |
378 | int *addrc, int *sizec) | |
379 | { | |
380 | if (addrc) | |
381 | *addrc = 2; | |
382 | if (sizec) | |
383 | *sizec = 1; | |
384 | } | |
385 | ||
4130a4b2 DM |
386 | /* |
387 | * FHC/Central bus specific translator. | |
388 | * | |
389 | * This is just needed to hard-code the address and size cell | |
390 | * counts. 'fhc' and 'central' nodes lack the #address-cells and | |
391 | * #size-cells properties, and if you walk to the root on such | |
392 | * Enterprise boxes all you'll get is a #size-cells of 2 which is | |
393 | * not what we want to use. | |
394 | */ | |
395 | static int of_bus_fhc_match(struct device_node *np) | |
cf44bbc2 | 396 | { |
4130a4b2 DM |
397 | return !strcmp(np->name, "fhc") || |
398 | !strcmp(np->name, "central"); | |
cf44bbc2 DM |
399 | } |
400 | ||
4130a4b2 | 401 | #define of_bus_fhc_count_cells of_bus_sbus_count_cells |
cf44bbc2 DM |
402 | |
403 | /* | |
404 | * Array of bus specific translators | |
405 | */ | |
406 | ||
407 | static struct of_bus of_busses[] = { | |
408 | /* PCI */ | |
409 | { | |
410 | .name = "pci", | |
411 | .addr_prop_name = "assigned-addresses", | |
412 | .match = of_bus_pci_match, | |
413 | .count_cells = of_bus_pci_count_cells, | |
414 | .map = of_bus_pci_map, | |
cf44bbc2 DM |
415 | .get_flags = of_bus_pci_get_flags, |
416 | }, | |
01f94c4a DM |
417 | /* SIMBA */ |
418 | { | |
419 | .name = "simba", | |
420 | .addr_prop_name = "assigned-addresses", | |
421 | .match = of_bus_simba_match, | |
422 | .count_cells = of_bus_pci_count_cells, | |
423 | .map = of_bus_simba_map, | |
424 | .get_flags = of_bus_pci_get_flags, | |
425 | }, | |
cf44bbc2 DM |
426 | /* SBUS */ |
427 | { | |
428 | .name = "sbus", | |
429 | .addr_prop_name = "reg", | |
430 | .match = of_bus_sbus_match, | |
431 | .count_cells = of_bus_sbus_count_cells, | |
4130a4b2 DM |
432 | .map = of_bus_default_map, |
433 | .get_flags = of_bus_default_get_flags, | |
434 | }, | |
435 | /* FHC */ | |
436 | { | |
437 | .name = "fhc", | |
438 | .addr_prop_name = "reg", | |
439 | .match = of_bus_fhc_match, | |
440 | .count_cells = of_bus_fhc_count_cells, | |
441 | .map = of_bus_default_map, | |
442 | .get_flags = of_bus_default_get_flags, | |
cf44bbc2 DM |
443 | }, |
444 | /* Default */ | |
445 | { | |
446 | .name = "default", | |
447 | .addr_prop_name = "reg", | |
448 | .match = NULL, | |
449 | .count_cells = of_bus_default_count_cells, | |
450 | .map = of_bus_default_map, | |
cf44bbc2 DM |
451 | .get_flags = of_bus_default_get_flags, |
452 | }, | |
453 | }; | |
454 | ||
455 | static struct of_bus *of_match_bus(struct device_node *np) | |
456 | { | |
457 | int i; | |
458 | ||
459 | for (i = 0; i < ARRAY_SIZE(of_busses); i ++) | |
460 | if (!of_busses[i].match || of_busses[i].match(np)) | |
461 | return &of_busses[i]; | |
462 | BUG(); | |
463 | return NULL; | |
464 | } | |
465 | ||
466 | static int __init build_one_resource(struct device_node *parent, | |
467 | struct of_bus *bus, | |
468 | struct of_bus *pbus, | |
469 | u32 *addr, | |
470 | int na, int ns, int pna) | |
471 | { | |
6a23acf3 | 472 | const u32 *ranges; |
cf44bbc2 DM |
473 | unsigned int rlen; |
474 | int rone; | |
cf44bbc2 DM |
475 | |
476 | ranges = of_get_property(parent, "ranges", &rlen); | |
477 | if (ranges == NULL || rlen == 0) { | |
a83f9823 DM |
478 | u32 result[OF_MAX_ADDR_CELLS]; |
479 | int i; | |
480 | ||
481 | memset(result, 0, pna * 4); | |
482 | for (i = 0; i < na; i++) | |
483 | result[pna - 1 - i] = | |
484 | addr[na - 1 - i]; | |
485 | ||
486 | memcpy(addr, result, pna * 4); | |
487 | return 0; | |
cf44bbc2 DM |
488 | } |
489 | ||
490 | /* Now walk through the ranges */ | |
491 | rlen /= 4; | |
492 | rone = na + pna + ns; | |
493 | for (; rlen >= rone; rlen -= rone, ranges += rone) { | |
a83f9823 DM |
494 | if (!bus->map(addr, ranges, na, ns, pna)) |
495 | return 0; | |
cf44bbc2 | 496 | } |
a83f9823 | 497 | |
49d23cfc DM |
498 | /* When we miss an I/O space match on PCI, just pass it up |
499 | * to the next PCI bridge and/or controller. | |
500 | */ | |
501 | if (!strcmp(bus->name, "pci") && | |
502 | (addr[0] & 0x03000000) == 0x01000000) | |
503 | return 0; | |
504 | ||
a83f9823 DM |
505 | return 1; |
506 | } | |
507 | ||
508 | static int __init use_1to1_mapping(struct device_node *pp) | |
509 | { | |
a83f9823 DM |
510 | /* If this is on the PMU bus, don't try to translate it even |
511 | * if a ranges property exists. | |
512 | */ | |
513 | if (!strcmp(pp->name, "pmu")) | |
cf44bbc2 DM |
514 | return 1; |
515 | ||
a83f9823 DM |
516 | /* If we have a ranges property in the parent, use it. */ |
517 | if (of_find_property(pp, "ranges", NULL) != NULL) | |
518 | return 0; | |
cf44bbc2 | 519 | |
a83f9823 DM |
520 | /* If the parent is the dma node of an ISA bus, pass |
521 | * the translation up to the root. | |
522 | */ | |
523 | if (!strcmp(pp->name, "dma")) | |
524 | return 0; | |
525 | ||
8c2786cf DM |
526 | /* Similarly for all PCI bridges, if we get this far |
527 | * it lacks a ranges property, and this will include | |
528 | * cases like Simba. | |
529 | */ | |
530 | if (!strcmp(pp->type, "pci") || !strcmp(pp->type, "pciex")) | |
a83f9823 DM |
531 | return 0; |
532 | ||
533 | return 1; | |
cf44bbc2 DM |
534 | } |
535 | ||
a83f9823 DM |
536 | static int of_resource_verbose; |
537 | ||
cf44bbc2 DM |
538 | static void __init build_device_resources(struct of_device *op, |
539 | struct device *parent) | |
540 | { | |
541 | struct of_device *p_op; | |
542 | struct of_bus *bus; | |
543 | int na, ns; | |
544 | int index, num_reg; | |
6a23acf3 | 545 | const void *preg; |
cf44bbc2 DM |
546 | |
547 | if (!parent) | |
548 | return; | |
549 | ||
550 | p_op = to_of_device(parent); | |
551 | bus = of_match_bus(p_op->node); | |
552 | bus->count_cells(op->node, &na, &ns); | |
553 | ||
554 | preg = of_get_property(op->node, bus->addr_prop_name, &num_reg); | |
555 | if (!preg || num_reg == 0) | |
556 | return; | |
557 | ||
558 | /* Convert to num-cells. */ | |
559 | num_reg /= 4; | |
560 | ||
46ba6d7d | 561 | /* Convert to num-entries. */ |
cf44bbc2 DM |
562 | num_reg /= na + ns; |
563 | ||
e5dd42e4 | 564 | /* Prevent overrunning the op->resources[] array. */ |
46ba6d7d DM |
565 | if (num_reg > PROMREG_MAX) { |
566 | printk(KERN_WARNING "%s: Too many regs (%d), " | |
567 | "limiting to %d.\n", | |
568 | op->node->full_name, num_reg, PROMREG_MAX); | |
569 | num_reg = PROMREG_MAX; | |
570 | } | |
571 | ||
cf44bbc2 DM |
572 | for (index = 0; index < num_reg; index++) { |
573 | struct resource *r = &op->resource[index]; | |
574 | u32 addr[OF_MAX_ADDR_CELLS]; | |
6a23acf3 | 575 | const u32 *reg = (preg + (index * ((na + ns) * 4))); |
cf44bbc2 DM |
576 | struct device_node *dp = op->node; |
577 | struct device_node *pp = p_op->node; | |
b85cdd49 | 578 | struct of_bus *pbus, *dbus; |
cf44bbc2 DM |
579 | u64 size, result = OF_BAD_ADDR; |
580 | unsigned long flags; | |
581 | int dna, dns; | |
582 | int pna, pns; | |
583 | ||
584 | size = of_read_addr(reg + na, ns); | |
585 | flags = bus->get_flags(reg); | |
586 | ||
587 | memcpy(addr, reg, na * 4); | |
588 | ||
a83f9823 | 589 | if (use_1to1_mapping(pp)) { |
cf44bbc2 DM |
590 | result = of_read_addr(addr, na); |
591 | goto build_res; | |
592 | } | |
593 | ||
594 | dna = na; | |
595 | dns = ns; | |
b85cdd49 | 596 | dbus = bus; |
cf44bbc2 DM |
597 | |
598 | while (1) { | |
599 | dp = pp; | |
600 | pp = dp->parent; | |
601 | if (!pp) { | |
602 | result = of_read_addr(addr, dna); | |
603 | break; | |
604 | } | |
605 | ||
606 | pbus = of_match_bus(pp); | |
607 | pbus->count_cells(dp, &pna, &pns); | |
608 | ||
b85cdd49 | 609 | if (build_one_resource(dp, dbus, pbus, addr, |
a83f9823 | 610 | dna, dns, pna)) |
cf44bbc2 DM |
611 | break; |
612 | ||
613 | dna = pna; | |
614 | dns = pns; | |
b85cdd49 | 615 | dbus = pbus; |
cf44bbc2 DM |
616 | } |
617 | ||
618 | build_res: | |
619 | memset(r, 0, sizeof(*r)); | |
a83f9823 DM |
620 | |
621 | if (of_resource_verbose) | |
622 | printk("%s reg[%d] -> %lx\n", | |
623 | op->node->full_name, index, | |
624 | result); | |
625 | ||
cf44bbc2 | 626 | if (result != OF_BAD_ADDR) { |
1815aed5 DM |
627 | if (tlb_type == hypervisor) |
628 | result &= 0x0fffffffffffffffUL; | |
629 | ||
cf44bbc2 DM |
630 | r->start = result; |
631 | r->end = result + size - 1; | |
632 | r->flags = flags; | |
cf44bbc2 DM |
633 | } |
634 | r->name = op->node->name; | |
635 | } | |
636 | } | |
637 | ||
2b1e5978 DM |
638 | static struct device_node * __init |
639 | apply_interrupt_map(struct device_node *dp, struct device_node *pp, | |
6a23acf3 | 640 | const u32 *imap, int imlen, const u32 *imask, |
2b1e5978 DM |
641 | unsigned int *irq_p) |
642 | { | |
643 | struct device_node *cp; | |
644 | unsigned int irq = *irq_p; | |
645 | struct of_bus *bus; | |
646 | phandle handle; | |
6a23acf3 | 647 | const u32 *reg; |
2b1e5978 DM |
648 | int na, num_reg, i; |
649 | ||
650 | bus = of_match_bus(pp); | |
651 | bus->count_cells(dp, &na, NULL); | |
652 | ||
653 | reg = of_get_property(dp, "reg", &num_reg); | |
654 | if (!reg || !num_reg) | |
655 | return NULL; | |
656 | ||
657 | imlen /= ((na + 3) * 4); | |
658 | handle = 0; | |
659 | for (i = 0; i < imlen; i++) { | |
660 | int j; | |
661 | ||
662 | for (j = 0; j < na; j++) { | |
663 | if ((reg[j] & imask[j]) != imap[j]) | |
664 | goto next; | |
665 | } | |
666 | if (imap[na] == irq) { | |
667 | handle = imap[na + 1]; | |
668 | irq = imap[na + 2]; | |
669 | break; | |
670 | } | |
671 | ||
672 | next: | |
673 | imap += (na + 3); | |
674 | } | |
46ba6d7d DM |
675 | if (i == imlen) { |
676 | /* Psycho and Sabre PCI controllers can have 'interrupt-map' | |
677 | * properties that do not include the on-board device | |
678 | * interrupts. Instead, the device's 'interrupts' property | |
679 | * is already a fully specified INO value. | |
680 | * | |
681 | * Handle this by deciding that, if we didn't get a | |
682 | * match in the parent's 'interrupt-map', and the | |
683 | * parent is an IRQ translater, then use the parent as | |
684 | * our IRQ controller. | |
685 | */ | |
686 | if (pp->irq_trans) | |
687 | return pp; | |
688 | ||
2b1e5978 | 689 | return NULL; |
46ba6d7d | 690 | } |
2b1e5978 DM |
691 | |
692 | *irq_p = irq; | |
693 | cp = of_find_node_by_phandle(handle); | |
694 | ||
695 | return cp; | |
696 | } | |
697 | ||
698 | static unsigned int __init pci_irq_swizzle(struct device_node *dp, | |
699 | struct device_node *pp, | |
700 | unsigned int irq) | |
701 | { | |
6a23acf3 | 702 | const struct linux_prom_pci_registers *regs; |
bb4c18cb | 703 | unsigned int bus, devfn, slot, ret; |
2b1e5978 DM |
704 | |
705 | if (irq < 1 || irq > 4) | |
706 | return irq; | |
707 | ||
708 | regs = of_get_property(dp, "reg", NULL); | |
709 | if (!regs) | |
710 | return irq; | |
711 | ||
bb4c18cb | 712 | bus = (regs->phys_hi >> 16) & 0xff; |
2b1e5978 DM |
713 | devfn = (regs->phys_hi >> 8) & 0xff; |
714 | slot = (devfn >> 3) & 0x1f; | |
715 | ||
bb4c18cb DM |
716 | if (pp->irq_trans) { |
717 | /* Derived from Table 8-3, U2P User's Manual. This branch | |
718 | * is handling a PCI controller that lacks a proper set of | |
719 | * interrupt-map and interrupt-map-mask properties. The | |
720 | * Ultra-E450 is one example. | |
721 | * | |
722 | * The bit layout is BSSLL, where: | |
723 | * B: 0 on bus A, 1 on bus B | |
724 | * D: 2-bit slot number, derived from PCI device number as | |
725 | * (dev - 1) for bus A, or (dev - 2) for bus B | |
726 | * L: 2-bit line number | |
bb4c18cb DM |
727 | */ |
728 | if (bus & 0x80) { | |
729 | /* PBM-A */ | |
730 | bus = 0x00; | |
731 | slot = (slot - 1) << 2; | |
732 | } else { | |
733 | /* PBM-B */ | |
734 | bus = 0x10; | |
735 | slot = (slot - 2) << 2; | |
736 | } | |
737 | irq -= 1; | |
738 | ||
739 | ret = (bus | slot | irq); | |
740 | } else { | |
741 | /* Going through a PCI-PCI bridge that lacks a set of | |
742 | * interrupt-map and interrupt-map-mask properties. | |
743 | */ | |
744 | ret = ((irq - 1 + (slot & 3)) & 3) + 1; | |
745 | } | |
2b1e5978 DM |
746 | |
747 | return ret; | |
748 | } | |
749 | ||
a83f9823 DM |
750 | static int of_irq_verbose; |
751 | ||
2b1e5978 DM |
752 | static unsigned int __init build_one_device_irq(struct of_device *op, |
753 | struct device *parent, | |
754 | unsigned int irq) | |
755 | { | |
756 | struct device_node *dp = op->node; | |
757 | struct device_node *pp, *ip; | |
758 | unsigned int orig_irq = irq; | |
759 | ||
760 | if (irq == 0xffffffff) | |
761 | return irq; | |
762 | ||
763 | if (dp->irq_trans) { | |
764 | irq = dp->irq_trans->irq_build(dp, irq, | |
765 | dp->irq_trans->data); | |
a83f9823 DM |
766 | |
767 | if (of_irq_verbose) | |
768 | printk("%s: direct translate %x --> %x\n", | |
769 | dp->full_name, orig_irq, irq); | |
770 | ||
2b1e5978 DM |
771 | return irq; |
772 | } | |
773 | ||
774 | /* Something more complicated. Walk up to the root, applying | |
775 | * interrupt-map or bus specific translations, until we hit | |
776 | * an IRQ translator. | |
777 | * | |
778 | * If we hit a bus type or situation we cannot handle, we | |
779 | * stop and assume that the original IRQ number was in a | |
780 | * format which has special meaning to it's immediate parent. | |
781 | */ | |
782 | pp = dp->parent; | |
783 | ip = NULL; | |
784 | while (pp) { | |
6a23acf3 | 785 | const void *imap, *imsk; |
2b1e5978 DM |
786 | int imlen; |
787 | ||
788 | imap = of_get_property(pp, "interrupt-map", &imlen); | |
789 | imsk = of_get_property(pp, "interrupt-map-mask", NULL); | |
790 | if (imap && imsk) { | |
791 | struct device_node *iret; | |
792 | int this_orig_irq = irq; | |
793 | ||
794 | iret = apply_interrupt_map(dp, pp, | |
795 | imap, imlen, imsk, | |
796 | &irq); | |
a83f9823 DM |
797 | |
798 | if (of_irq_verbose) | |
799 | printk("%s: Apply [%s:%x] imap --> [%s:%x]\n", | |
800 | op->node->full_name, | |
801 | pp->full_name, this_orig_irq, | |
802 | (iret ? iret->full_name : "NULL"), irq); | |
803 | ||
2b1e5978 DM |
804 | if (!iret) |
805 | break; | |
806 | ||
807 | if (iret->irq_trans) { | |
808 | ip = iret; | |
809 | break; | |
810 | } | |
811 | } else { | |
812 | if (!strcmp(pp->type, "pci") || | |
813 | !strcmp(pp->type, "pciex")) { | |
814 | unsigned int this_orig_irq = irq; | |
815 | ||
816 | irq = pci_irq_swizzle(dp, pp, irq); | |
a83f9823 DM |
817 | if (of_irq_verbose) |
818 | printk("%s: PCI swizzle [%s] " | |
819 | "%x --> %x\n", | |
820 | op->node->full_name, | |
821 | pp->full_name, this_orig_irq, | |
822 | irq); | |
823 | ||
2b1e5978 DM |
824 | } |
825 | ||
826 | if (pp->irq_trans) { | |
827 | ip = pp; | |
828 | break; | |
829 | } | |
830 | } | |
831 | dp = pp; | |
832 | pp = pp->parent; | |
833 | } | |
834 | if (!ip) | |
835 | return orig_irq; | |
836 | ||
837 | irq = ip->irq_trans->irq_build(op->node, irq, | |
838 | ip->irq_trans->data); | |
a83f9823 DM |
839 | if (of_irq_verbose) |
840 | printk("%s: Apply IRQ trans [%s] %x --> %x\n", | |
841 | op->node->full_name, ip->full_name, orig_irq, irq); | |
2b1e5978 DM |
842 | |
843 | return irq; | |
844 | } | |
845 | ||
cf44bbc2 DM |
846 | static struct of_device * __init scan_one_device(struct device_node *dp, |
847 | struct device *parent) | |
848 | { | |
849 | struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL); | |
6a23acf3 | 850 | const unsigned int *irq; |
2b1e5978 | 851 | int len, i; |
cf44bbc2 DM |
852 | |
853 | if (!op) | |
854 | return NULL; | |
855 | ||
856 | op->node = dp; | |
857 | ||
858 | op->clock_freq = of_getintprop_default(dp, "clock-frequency", | |
859 | (25*1000*1000)); | |
860 | op->portid = of_getintprop_default(dp, "upa-portid", -1); | |
861 | if (op->portid == -1) | |
862 | op->portid = of_getintprop_default(dp, "portid", -1); | |
863 | ||
864 | irq = of_get_property(dp, "interrupts", &len); | |
2b1e5978 DM |
865 | if (irq) { |
866 | memcpy(op->irqs, irq, len); | |
867 | op->num_irqs = len / 4; | |
868 | } else { | |
869 | op->num_irqs = 0; | |
870 | } | |
cf44bbc2 | 871 | |
e5dd42e4 | 872 | /* Prevent overrunning the op->irqs[] array. */ |
46ba6d7d DM |
873 | if (op->num_irqs > PROMINTR_MAX) { |
874 | printk(KERN_WARNING "%s: Too many irqs (%d), " | |
875 | "limiting to %d.\n", | |
876 | dp->full_name, op->num_irqs, PROMINTR_MAX); | |
877 | op->num_irqs = PROMINTR_MAX; | |
878 | } | |
879 | ||
cf44bbc2 | 880 | build_device_resources(op, parent); |
2b1e5978 DM |
881 | for (i = 0; i < op->num_irqs; i++) |
882 | op->irqs[i] = build_one_device_irq(op, parent, op->irqs[i]); | |
cf44bbc2 DM |
883 | |
884 | op->dev.parent = parent; | |
37b7754a | 885 | op->dev.bus = &of_platform_bus_type; |
cf44bbc2 DM |
886 | if (!parent) |
887 | strcpy(op->dev.bus_id, "root"); | |
888 | else | |
f5ef9d11 | 889 | sprintf(op->dev.bus_id, "%08x", dp->node); |
cf44bbc2 DM |
890 | |
891 | if (of_device_register(op)) { | |
892 | printk("%s: Could not register of device.\n", | |
893 | dp->full_name); | |
894 | kfree(op); | |
895 | op = NULL; | |
896 | } | |
897 | ||
898 | return op; | |
899 | } | |
900 | ||
901 | static void __init scan_tree(struct device_node *dp, struct device *parent) | |
902 | { | |
903 | while (dp) { | |
904 | struct of_device *op = scan_one_device(dp, parent); | |
905 | ||
906 | if (op) | |
907 | scan_tree(dp->child, &op->dev); | |
908 | ||
909 | dp = dp->sibling; | |
910 | } | |
911 | } | |
912 | ||
913 | static void __init scan_of_devices(void) | |
914 | { | |
915 | struct device_node *root = of_find_node_by_path("/"); | |
916 | struct of_device *parent; | |
917 | ||
918 | parent = scan_one_device(root, NULL); | |
919 | if (!parent) | |
920 | return; | |
921 | ||
922 | scan_tree(root->child, &parent->dev); | |
923 | } | |
924 | ||
a2bd4fd1 DM |
925 | static int __init of_bus_driver_init(void) |
926 | { | |
cf44bbc2 | 927 | int err; |
a2bd4fd1 | 928 | |
37b7754a | 929 | err = bus_register(&of_platform_bus_type); |
a2bd4fd1 DM |
930 | #ifdef CONFIG_PCI |
931 | if (!err) | |
932 | err = bus_register(&isa_bus_type); | |
933 | if (!err) | |
934 | err = bus_register(&ebus_bus_type); | |
935 | #endif | |
936 | #ifdef CONFIG_SBUS | |
937 | if (!err) | |
938 | err = bus_register(&sbus_bus_type); | |
939 | #endif | |
cf44bbc2 DM |
940 | |
941 | if (!err) | |
942 | scan_of_devices(); | |
943 | ||
944 | return err; | |
a2bd4fd1 DM |
945 | } |
946 | ||
947 | postcore_initcall(of_bus_driver_init); | |
948 | ||
a83f9823 DM |
949 | static int __init of_debug(char *str) |
950 | { | |
951 | int val = 0; | |
952 | ||
953 | get_option(&str, &val); | |
954 | if (val & 1) | |
955 | of_resource_verbose = 1; | |
956 | if (val & 2) | |
957 | of_irq_verbose = 1; | |
958 | return 1; | |
959 | } | |
960 | ||
961 | __setup("of_debug=", of_debug); | |
962 | ||
a2bd4fd1 DM |
963 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) |
964 | { | |
965 | /* initialize common driver fields */ | |
966 | drv->driver.name = drv->name; | |
967 | drv->driver.bus = bus; | |
968 | ||
969 | /* register with core */ | |
970 | return driver_register(&drv->driver); | |
971 | } | |
f85ff305 | 972 | EXPORT_SYMBOL(of_register_driver); |
a2bd4fd1 DM |
973 | |
974 | void of_unregister_driver(struct of_platform_driver *drv) | |
975 | { | |
976 | driver_unregister(&drv->driver); | |
977 | } | |
f85ff305 | 978 | EXPORT_SYMBOL(of_unregister_driver); |
a2bd4fd1 DM |
979 | |
980 | struct of_device* of_platform_device_create(struct device_node *np, | |
981 | const char *bus_id, | |
982 | struct device *parent, | |
983 | struct bus_type *bus) | |
984 | { | |
985 | struct of_device *dev; | |
986 | ||
982c2064 | 987 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
a2bd4fd1 DM |
988 | if (!dev) |
989 | return NULL; | |
a2bd4fd1 DM |
990 | |
991 | dev->dev.parent = parent; | |
992 | dev->dev.bus = bus; | |
993 | dev->dev.release = of_release_dev; | |
994 | ||
995 | strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE); | |
996 | ||
997 | if (of_device_register(dev) != 0) { | |
998 | kfree(dev); | |
999 | return NULL; | |
1000 | } | |
1001 | ||
1002 | return dev; | |
1003 | } | |
a2bd4fd1 | 1004 | EXPORT_SYMBOL(of_platform_device_create); |