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a2bd4fd1 DM |
1 | #include <linux/string.h> |
2 | #include <linux/kernel.h> | |
3 | #include <linux/init.h> | |
4 | #include <linux/module.h> | |
5 | #include <linux/mod_devicetable.h> | |
6 | #include <linux/slab.h> | |
7 | ||
8 | #include <asm/errno.h> | |
9 | #include <asm/of_device.h> | |
10 | ||
11 | /** | |
12 | * of_match_device - Tell if an of_device structure has a matching | |
13 | * of_match structure | |
14 | * @ids: array of of device match structures to search in | |
15 | * @dev: the of device structure to match against | |
16 | * | |
17 | * Used by a driver to check whether an of_device present in the | |
18 | * system is in its list of supported devices. | |
19 | */ | |
20 | const struct of_device_id *of_match_device(const struct of_device_id *matches, | |
21 | const struct of_device *dev) | |
22 | { | |
23 | if (!dev->node) | |
24 | return NULL; | |
25 | while (matches->name[0] || matches->type[0] || matches->compatible[0]) { | |
26 | int match = 1; | |
27 | if (matches->name[0]) | |
28 | match &= dev->node->name | |
29 | && !strcmp(matches->name, dev->node->name); | |
30 | if (matches->type[0]) | |
31 | match &= dev->node->type | |
32 | && !strcmp(matches->type, dev->node->type); | |
33 | if (matches->compatible[0]) | |
34 | match &= of_device_is_compatible(dev->node, | |
35 | matches->compatible); | |
36 | if (match) | |
37 | return matches; | |
38 | matches++; | |
39 | } | |
40 | return NULL; | |
41 | } | |
42 | ||
43 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) | |
44 | { | |
45 | struct of_device * of_dev = to_of_device(dev); | |
46 | struct of_platform_driver * of_drv = to_of_platform_driver(drv); | |
47 | const struct of_device_id * matches = of_drv->match_table; | |
48 | ||
49 | if (!matches) | |
50 | return 0; | |
51 | ||
52 | return of_match_device(matches, of_dev) != NULL; | |
53 | } | |
54 | ||
55 | struct of_device *of_dev_get(struct of_device *dev) | |
56 | { | |
57 | struct device *tmp; | |
58 | ||
59 | if (!dev) | |
60 | return NULL; | |
61 | tmp = get_device(&dev->dev); | |
62 | if (tmp) | |
63 | return to_of_device(tmp); | |
64 | else | |
65 | return NULL; | |
66 | } | |
67 | ||
68 | void of_dev_put(struct of_device *dev) | |
69 | { | |
70 | if (dev) | |
71 | put_device(&dev->dev); | |
72 | } | |
73 | ||
74 | ||
75 | static int of_device_probe(struct device *dev) | |
76 | { | |
77 | int error = -ENODEV; | |
78 | struct of_platform_driver *drv; | |
79 | struct of_device *of_dev; | |
80 | const struct of_device_id *match; | |
81 | ||
82 | drv = to_of_platform_driver(dev->driver); | |
83 | of_dev = to_of_device(dev); | |
84 | ||
85 | if (!drv->probe) | |
86 | return error; | |
87 | ||
88 | of_dev_get(of_dev); | |
89 | ||
90 | match = of_match_device(drv->match_table, of_dev); | |
91 | if (match) | |
92 | error = drv->probe(of_dev, match); | |
93 | if (error) | |
94 | of_dev_put(of_dev); | |
95 | ||
96 | return error; | |
97 | } | |
98 | ||
99 | static int of_device_remove(struct device *dev) | |
100 | { | |
101 | struct of_device * of_dev = to_of_device(dev); | |
102 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
103 | ||
104 | if (dev->driver && drv->remove) | |
105 | drv->remove(of_dev); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static int of_device_suspend(struct device *dev, pm_message_t state) | |
110 | { | |
111 | struct of_device * of_dev = to_of_device(dev); | |
112 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
113 | int error = 0; | |
114 | ||
115 | if (dev->driver && drv->suspend) | |
116 | error = drv->suspend(of_dev, state); | |
117 | return error; | |
118 | } | |
119 | ||
120 | static int of_device_resume(struct device * dev) | |
121 | { | |
122 | struct of_device * of_dev = to_of_device(dev); | |
123 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
124 | int error = 0; | |
125 | ||
126 | if (dev->driver && drv->resume) | |
127 | error = drv->resume(of_dev); | |
128 | return error; | |
129 | } | |
130 | ||
3ca9fab4 DM |
131 | void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name) |
132 | { | |
133 | unsigned long ret = res->start + offset; | |
134 | ||
135 | if (!request_region(ret, size, name)) | |
136 | ret = 0; | |
137 | ||
138 | return (void __iomem *) ret; | |
139 | } | |
140 | EXPORT_SYMBOL(of_ioremap); | |
141 | ||
142 | void of_iounmap(void __iomem *base, unsigned long size) | |
143 | { | |
144 | release_region((unsigned long) base, size); | |
145 | } | |
146 | EXPORT_SYMBOL(of_iounmap); | |
147 | ||
2b1e5978 DM |
148 | static int node_match(struct device *dev, void *data) |
149 | { | |
150 | struct of_device *op = to_of_device(dev); | |
151 | struct device_node *dp = data; | |
152 | ||
153 | return (op->node == dp); | |
154 | } | |
155 | ||
156 | struct of_device *of_find_device_by_node(struct device_node *dp) | |
157 | { | |
158 | struct device *dev = bus_find_device(&of_bus_type, NULL, | |
159 | dp, node_match); | |
160 | ||
161 | if (dev) | |
162 | return to_of_device(dev); | |
163 | ||
164 | return NULL; | |
165 | } | |
166 | EXPORT_SYMBOL(of_find_device_by_node); | |
167 | ||
a2bd4fd1 DM |
168 | #ifdef CONFIG_PCI |
169 | struct bus_type isa_bus_type = { | |
170 | .name = "isa", | |
171 | .match = of_platform_bus_match, | |
172 | .probe = of_device_probe, | |
173 | .remove = of_device_remove, | |
174 | .suspend = of_device_suspend, | |
175 | .resume = of_device_resume, | |
176 | }; | |
69853918 | 177 | EXPORT_SYMBOL(isa_bus_type); |
a2bd4fd1 DM |
178 | |
179 | struct bus_type ebus_bus_type = { | |
180 | .name = "ebus", | |
181 | .match = of_platform_bus_match, | |
182 | .probe = of_device_probe, | |
183 | .remove = of_device_remove, | |
184 | .suspend = of_device_suspend, | |
185 | .resume = of_device_resume, | |
186 | }; | |
69853918 | 187 | EXPORT_SYMBOL(ebus_bus_type); |
a2bd4fd1 DM |
188 | #endif |
189 | ||
190 | #ifdef CONFIG_SBUS | |
191 | struct bus_type sbus_bus_type = { | |
192 | .name = "sbus", | |
193 | .match = of_platform_bus_match, | |
194 | .probe = of_device_probe, | |
195 | .remove = of_device_remove, | |
196 | .suspend = of_device_suspend, | |
197 | .resume = of_device_resume, | |
198 | }; | |
69853918 | 199 | EXPORT_SYMBOL(sbus_bus_type); |
a2bd4fd1 DM |
200 | #endif |
201 | ||
cf44bbc2 DM |
202 | struct bus_type of_bus_type = { |
203 | .name = "of", | |
204 | .match = of_platform_bus_match, | |
205 | .probe = of_device_probe, | |
206 | .remove = of_device_remove, | |
207 | .suspend = of_device_suspend, | |
208 | .resume = of_device_resume, | |
209 | }; | |
210 | EXPORT_SYMBOL(of_bus_type); | |
211 | ||
a83f9823 | 212 | static inline u64 of_read_addr(const u32 *cell, int size) |
cf44bbc2 DM |
213 | { |
214 | u64 r = 0; | |
215 | while (size--) | |
216 | r = (r << 32) | *(cell++); | |
217 | return r; | |
218 | } | |
219 | ||
220 | static void __init get_cells(struct device_node *dp, | |
221 | int *addrc, int *sizec) | |
222 | { | |
223 | if (addrc) | |
224 | *addrc = of_n_addr_cells(dp); | |
225 | if (sizec) | |
226 | *sizec = of_n_size_cells(dp); | |
227 | } | |
228 | ||
229 | /* Max address size we deal with */ | |
230 | #define OF_MAX_ADDR_CELLS 4 | |
231 | ||
232 | struct of_bus { | |
233 | const char *name; | |
234 | const char *addr_prop_name; | |
235 | int (*match)(struct device_node *parent); | |
236 | void (*count_cells)(struct device_node *child, | |
237 | int *addrc, int *sizec); | |
a83f9823 DM |
238 | int (*map)(u32 *addr, const u32 *range, |
239 | int na, int ns, int pna); | |
cf44bbc2 DM |
240 | unsigned int (*get_flags)(u32 *addr); |
241 | }; | |
242 | ||
243 | /* | |
244 | * Default translator (generic bus) | |
245 | */ | |
246 | ||
247 | static void of_bus_default_count_cells(struct device_node *dev, | |
248 | int *addrc, int *sizec) | |
249 | { | |
250 | get_cells(dev, addrc, sizec); | |
251 | } | |
252 | ||
a83f9823 DM |
253 | /* Make sure the least significant 64-bits are in-range. Even |
254 | * for 3 or 4 cell values it is a good enough approximation. | |
255 | */ | |
256 | static int of_out_of_range(const u32 *addr, const u32 *base, | |
257 | const u32 *size, int na, int ns) | |
cf44bbc2 | 258 | { |
a83f9823 DM |
259 | u64 a = of_read_addr(addr, na); |
260 | u64 b = of_read_addr(base, na); | |
cf44bbc2 | 261 | |
a83f9823 DM |
262 | if (a < b) |
263 | return 1; | |
cf44bbc2 | 264 | |
a83f9823 DM |
265 | b += of_read_addr(size, ns); |
266 | if (a >= b) | |
267 | return 1; | |
268 | ||
269 | return 0; | |
cf44bbc2 DM |
270 | } |
271 | ||
a83f9823 DM |
272 | static int of_bus_default_map(u32 *addr, const u32 *range, |
273 | int na, int ns, int pna) | |
cf44bbc2 | 274 | { |
a83f9823 DM |
275 | u32 result[OF_MAX_ADDR_CELLS]; |
276 | int i; | |
277 | ||
278 | if (ns > 2) { | |
279 | printk("of_device: Cannot handle size cells (%d) > 2.", ns); | |
280 | return -EINVAL; | |
281 | } | |
282 | ||
283 | if (of_out_of_range(addr, range, range + na + pna, na, ns)) | |
284 | return -EINVAL; | |
285 | ||
286 | /* Start with the parent range base. */ | |
287 | memcpy(result, range + na, pna * 4); | |
288 | ||
289 | /* Add in the child address offset. */ | |
290 | for (i = 0; i < na; i++) | |
291 | result[pna - 1 - i] += | |
292 | (addr[na - 1 - i] - | |
293 | range[na - 1 - i]); | |
294 | ||
295 | memcpy(addr, result, pna * 4); | |
cf44bbc2 DM |
296 | |
297 | return 0; | |
298 | } | |
299 | ||
300 | static unsigned int of_bus_default_get_flags(u32 *addr) | |
301 | { | |
302 | return IORESOURCE_MEM; | |
303 | } | |
304 | ||
cf44bbc2 DM |
305 | /* |
306 | * PCI bus specific translator | |
307 | */ | |
308 | ||
309 | static int of_bus_pci_match(struct device_node *np) | |
310 | { | |
a83f9823 DM |
311 | if (!strcmp(np->type, "pci") || !strcmp(np->type, "pciex")) { |
312 | /* Do not do PCI specific frobbing if the | |
313 | * PCI bridge lacks a ranges property. We | |
314 | * want to pass it through up to the next | |
315 | * parent as-is, not with the PCI translate | |
316 | * method which chops off the top address cell. | |
317 | */ | |
318 | if (!of_find_property(np, "ranges", NULL)) | |
319 | return 0; | |
320 | ||
321 | return 1; | |
322 | } | |
323 | ||
324 | return 0; | |
cf44bbc2 DM |
325 | } |
326 | ||
327 | static void of_bus_pci_count_cells(struct device_node *np, | |
328 | int *addrc, int *sizec) | |
329 | { | |
330 | if (addrc) | |
331 | *addrc = 3; | |
332 | if (sizec) | |
333 | *sizec = 2; | |
334 | } | |
335 | ||
a83f9823 DM |
336 | static int of_bus_pci_map(u32 *addr, const u32 *range, |
337 | int na, int ns, int pna) | |
cf44bbc2 | 338 | { |
a83f9823 DM |
339 | u32 result[OF_MAX_ADDR_CELLS]; |
340 | int i; | |
cf44bbc2 DM |
341 | |
342 | /* Check address type match */ | |
343 | if ((addr[0] ^ range[0]) & 0x03000000) | |
a83f9823 | 344 | return -EINVAL; |
cf44bbc2 | 345 | |
a83f9823 DM |
346 | if (of_out_of_range(addr + 1, range + 1, range + na + pna, |
347 | na - 1, ns)) | |
348 | return -EINVAL; | |
cf44bbc2 | 349 | |
a83f9823 DM |
350 | /* Start with the parent range base. */ |
351 | memcpy(result, range + na, pna * 4); | |
cf44bbc2 | 352 | |
a83f9823 DM |
353 | /* Add in the child address offset, skipping high cell. */ |
354 | for (i = 0; i < na - 1; i++) | |
355 | result[pna - 1 - i] += | |
356 | (addr[na - 1 - i] - | |
357 | range[na - 1 - i]); | |
358 | ||
359 | memcpy(addr, result, pna * 4); | |
360 | ||
361 | return 0; | |
cf44bbc2 DM |
362 | } |
363 | ||
364 | static unsigned int of_bus_pci_get_flags(u32 *addr) | |
365 | { | |
366 | unsigned int flags = 0; | |
367 | u32 w = addr[0]; | |
368 | ||
369 | switch((w >> 24) & 0x03) { | |
370 | case 0x01: | |
371 | flags |= IORESOURCE_IO; | |
372 | case 0x02: /* 32 bits */ | |
373 | case 0x03: /* 64 bits */ | |
374 | flags |= IORESOURCE_MEM; | |
375 | } | |
376 | if (w & 0x40000000) | |
377 | flags |= IORESOURCE_PREFETCH; | |
378 | return flags; | |
379 | } | |
380 | ||
cf44bbc2 DM |
381 | /* |
382 | * SBUS bus specific translator | |
383 | */ | |
384 | ||
385 | static int of_bus_sbus_match(struct device_node *np) | |
386 | { | |
387 | return !strcmp(np->name, "sbus") || | |
388 | !strcmp(np->name, "sbi"); | |
389 | } | |
390 | ||
391 | static void of_bus_sbus_count_cells(struct device_node *child, | |
392 | int *addrc, int *sizec) | |
393 | { | |
394 | if (addrc) | |
395 | *addrc = 2; | |
396 | if (sizec) | |
397 | *sizec = 1; | |
398 | } | |
399 | ||
a83f9823 | 400 | static int of_bus_sbus_map(u32 *addr, const u32 *range, int na, int ns, int pna) |
cf44bbc2 DM |
401 | { |
402 | return of_bus_default_map(addr, range, na, ns, pna); | |
403 | } | |
404 | ||
cf44bbc2 DM |
405 | static unsigned int of_bus_sbus_get_flags(u32 *addr) |
406 | { | |
407 | return IORESOURCE_MEM; | |
408 | } | |
409 | ||
410 | ||
411 | /* | |
412 | * Array of bus specific translators | |
413 | */ | |
414 | ||
415 | static struct of_bus of_busses[] = { | |
416 | /* PCI */ | |
417 | { | |
418 | .name = "pci", | |
419 | .addr_prop_name = "assigned-addresses", | |
420 | .match = of_bus_pci_match, | |
421 | .count_cells = of_bus_pci_count_cells, | |
422 | .map = of_bus_pci_map, | |
cf44bbc2 DM |
423 | .get_flags = of_bus_pci_get_flags, |
424 | }, | |
cf44bbc2 DM |
425 | /* SBUS */ |
426 | { | |
427 | .name = "sbus", | |
428 | .addr_prop_name = "reg", | |
429 | .match = of_bus_sbus_match, | |
430 | .count_cells = of_bus_sbus_count_cells, | |
431 | .map = of_bus_sbus_map, | |
cf44bbc2 DM |
432 | .get_flags = of_bus_sbus_get_flags, |
433 | }, | |
434 | /* Default */ | |
435 | { | |
436 | .name = "default", | |
437 | .addr_prop_name = "reg", | |
438 | .match = NULL, | |
439 | .count_cells = of_bus_default_count_cells, | |
440 | .map = of_bus_default_map, | |
cf44bbc2 DM |
441 | .get_flags = of_bus_default_get_flags, |
442 | }, | |
443 | }; | |
444 | ||
445 | static struct of_bus *of_match_bus(struct device_node *np) | |
446 | { | |
447 | int i; | |
448 | ||
449 | for (i = 0; i < ARRAY_SIZE(of_busses); i ++) | |
450 | if (!of_busses[i].match || of_busses[i].match(np)) | |
451 | return &of_busses[i]; | |
452 | BUG(); | |
453 | return NULL; | |
454 | } | |
455 | ||
456 | static int __init build_one_resource(struct device_node *parent, | |
457 | struct of_bus *bus, | |
458 | struct of_bus *pbus, | |
459 | u32 *addr, | |
460 | int na, int ns, int pna) | |
461 | { | |
462 | u32 *ranges; | |
463 | unsigned int rlen; | |
464 | int rone; | |
cf44bbc2 DM |
465 | |
466 | ranges = of_get_property(parent, "ranges", &rlen); | |
467 | if (ranges == NULL || rlen == 0) { | |
a83f9823 DM |
468 | u32 result[OF_MAX_ADDR_CELLS]; |
469 | int i; | |
470 | ||
471 | memset(result, 0, pna * 4); | |
472 | for (i = 0; i < na; i++) | |
473 | result[pna - 1 - i] = | |
474 | addr[na - 1 - i]; | |
475 | ||
476 | memcpy(addr, result, pna * 4); | |
477 | return 0; | |
cf44bbc2 DM |
478 | } |
479 | ||
480 | /* Now walk through the ranges */ | |
481 | rlen /= 4; | |
482 | rone = na + pna + ns; | |
483 | for (; rlen >= rone; rlen -= rone, ranges += rone) { | |
a83f9823 DM |
484 | if (!bus->map(addr, ranges, na, ns, pna)) |
485 | return 0; | |
cf44bbc2 | 486 | } |
a83f9823 DM |
487 | |
488 | return 1; | |
489 | } | |
490 | ||
491 | static int __init use_1to1_mapping(struct device_node *pp) | |
492 | { | |
493 | char *model; | |
494 | ||
495 | /* If this is on the PMU bus, don't try to translate it even | |
496 | * if a ranges property exists. | |
497 | */ | |
498 | if (!strcmp(pp->name, "pmu")) | |
cf44bbc2 DM |
499 | return 1; |
500 | ||
a83f9823 DM |
501 | /* If we have a ranges property in the parent, use it. */ |
502 | if (of_find_property(pp, "ranges", NULL) != NULL) | |
503 | return 0; | |
cf44bbc2 | 504 | |
a83f9823 DM |
505 | /* If the parent is the dma node of an ISA bus, pass |
506 | * the translation up to the root. | |
507 | */ | |
508 | if (!strcmp(pp->name, "dma")) | |
509 | return 0; | |
510 | ||
511 | /* Similarly for Simba PCI bridges. */ | |
512 | model = of_get_property(pp, "model", NULL); | |
513 | if (model && !strcmp(model, "SUNW,simba")) | |
514 | return 0; | |
515 | ||
516 | return 1; | |
cf44bbc2 DM |
517 | } |
518 | ||
a83f9823 DM |
519 | static int of_resource_verbose; |
520 | ||
cf44bbc2 DM |
521 | static void __init build_device_resources(struct of_device *op, |
522 | struct device *parent) | |
523 | { | |
524 | struct of_device *p_op; | |
525 | struct of_bus *bus; | |
526 | int na, ns; | |
527 | int index, num_reg; | |
528 | void *preg; | |
529 | ||
530 | if (!parent) | |
531 | return; | |
532 | ||
533 | p_op = to_of_device(parent); | |
534 | bus = of_match_bus(p_op->node); | |
535 | bus->count_cells(op->node, &na, &ns); | |
536 | ||
537 | preg = of_get_property(op->node, bus->addr_prop_name, &num_reg); | |
538 | if (!preg || num_reg == 0) | |
539 | return; | |
540 | ||
541 | /* Convert to num-cells. */ | |
542 | num_reg /= 4; | |
543 | ||
46ba6d7d | 544 | /* Convert to num-entries. */ |
cf44bbc2 DM |
545 | num_reg /= na + ns; |
546 | ||
46ba6d7d DM |
547 | /* Prevent overruning the op->resources[] array. */ |
548 | if (num_reg > PROMREG_MAX) { | |
549 | printk(KERN_WARNING "%s: Too many regs (%d), " | |
550 | "limiting to %d.\n", | |
551 | op->node->full_name, num_reg, PROMREG_MAX); | |
552 | num_reg = PROMREG_MAX; | |
553 | } | |
554 | ||
cf44bbc2 DM |
555 | for (index = 0; index < num_reg; index++) { |
556 | struct resource *r = &op->resource[index]; | |
557 | u32 addr[OF_MAX_ADDR_CELLS]; | |
558 | u32 *reg = (preg + (index * ((na + ns) * 4))); | |
559 | struct device_node *dp = op->node; | |
560 | struct device_node *pp = p_op->node; | |
561 | struct of_bus *pbus; | |
562 | u64 size, result = OF_BAD_ADDR; | |
563 | unsigned long flags; | |
564 | int dna, dns; | |
565 | int pna, pns; | |
566 | ||
567 | size = of_read_addr(reg + na, ns); | |
568 | flags = bus->get_flags(reg); | |
569 | ||
570 | memcpy(addr, reg, na * 4); | |
571 | ||
a83f9823 | 572 | if (use_1to1_mapping(pp)) { |
cf44bbc2 DM |
573 | result = of_read_addr(addr, na); |
574 | goto build_res; | |
575 | } | |
576 | ||
577 | dna = na; | |
578 | dns = ns; | |
579 | ||
580 | while (1) { | |
581 | dp = pp; | |
582 | pp = dp->parent; | |
583 | if (!pp) { | |
584 | result = of_read_addr(addr, dna); | |
585 | break; | |
586 | } | |
587 | ||
588 | pbus = of_match_bus(pp); | |
589 | pbus->count_cells(dp, &pna, &pns); | |
590 | ||
a83f9823 DM |
591 | if (build_one_resource(dp, bus, pbus, addr, |
592 | dna, dns, pna)) | |
cf44bbc2 DM |
593 | break; |
594 | ||
595 | dna = pna; | |
596 | dns = pns; | |
597 | bus = pbus; | |
598 | } | |
599 | ||
600 | build_res: | |
601 | memset(r, 0, sizeof(*r)); | |
a83f9823 DM |
602 | |
603 | if (of_resource_verbose) | |
604 | printk("%s reg[%d] -> %lx\n", | |
605 | op->node->full_name, index, | |
606 | result); | |
607 | ||
cf44bbc2 | 608 | if (result != OF_BAD_ADDR) { |
1815aed5 DM |
609 | if (tlb_type == hypervisor) |
610 | result &= 0x0fffffffffffffffUL; | |
611 | ||
cf44bbc2 DM |
612 | r->start = result; |
613 | r->end = result + size - 1; | |
614 | r->flags = flags; | |
615 | } else { | |
616 | r->start = ~0UL; | |
617 | r->end = ~0UL; | |
618 | } | |
619 | r->name = op->node->name; | |
620 | } | |
621 | } | |
622 | ||
2b1e5978 DM |
623 | static struct device_node * __init |
624 | apply_interrupt_map(struct device_node *dp, struct device_node *pp, | |
625 | u32 *imap, int imlen, u32 *imask, | |
626 | unsigned int *irq_p) | |
627 | { | |
628 | struct device_node *cp; | |
629 | unsigned int irq = *irq_p; | |
630 | struct of_bus *bus; | |
631 | phandle handle; | |
632 | u32 *reg; | |
633 | int na, num_reg, i; | |
634 | ||
635 | bus = of_match_bus(pp); | |
636 | bus->count_cells(dp, &na, NULL); | |
637 | ||
638 | reg = of_get_property(dp, "reg", &num_reg); | |
639 | if (!reg || !num_reg) | |
640 | return NULL; | |
641 | ||
642 | imlen /= ((na + 3) * 4); | |
643 | handle = 0; | |
644 | for (i = 0; i < imlen; i++) { | |
645 | int j; | |
646 | ||
647 | for (j = 0; j < na; j++) { | |
648 | if ((reg[j] & imask[j]) != imap[j]) | |
649 | goto next; | |
650 | } | |
651 | if (imap[na] == irq) { | |
652 | handle = imap[na + 1]; | |
653 | irq = imap[na + 2]; | |
654 | break; | |
655 | } | |
656 | ||
657 | next: | |
658 | imap += (na + 3); | |
659 | } | |
46ba6d7d DM |
660 | if (i == imlen) { |
661 | /* Psycho and Sabre PCI controllers can have 'interrupt-map' | |
662 | * properties that do not include the on-board device | |
663 | * interrupts. Instead, the device's 'interrupts' property | |
664 | * is already a fully specified INO value. | |
665 | * | |
666 | * Handle this by deciding that, if we didn't get a | |
667 | * match in the parent's 'interrupt-map', and the | |
668 | * parent is an IRQ translater, then use the parent as | |
669 | * our IRQ controller. | |
670 | */ | |
671 | if (pp->irq_trans) | |
672 | return pp; | |
673 | ||
2b1e5978 | 674 | return NULL; |
46ba6d7d | 675 | } |
2b1e5978 DM |
676 | |
677 | *irq_p = irq; | |
678 | cp = of_find_node_by_phandle(handle); | |
679 | ||
680 | return cp; | |
681 | } | |
682 | ||
683 | static unsigned int __init pci_irq_swizzle(struct device_node *dp, | |
684 | struct device_node *pp, | |
685 | unsigned int irq) | |
686 | { | |
687 | struct linux_prom_pci_registers *regs; | |
688 | unsigned int devfn, slot, ret; | |
689 | ||
690 | if (irq < 1 || irq > 4) | |
691 | return irq; | |
692 | ||
693 | regs = of_get_property(dp, "reg", NULL); | |
694 | if (!regs) | |
695 | return irq; | |
696 | ||
697 | devfn = (regs->phys_hi >> 8) & 0xff; | |
698 | slot = (devfn >> 3) & 0x1f; | |
699 | ||
700 | ret = ((irq - 1 + (slot & 3)) & 3) + 1; | |
701 | ||
702 | return ret; | |
703 | } | |
704 | ||
a83f9823 DM |
705 | static int of_irq_verbose; |
706 | ||
2b1e5978 DM |
707 | static unsigned int __init build_one_device_irq(struct of_device *op, |
708 | struct device *parent, | |
709 | unsigned int irq) | |
710 | { | |
711 | struct device_node *dp = op->node; | |
712 | struct device_node *pp, *ip; | |
713 | unsigned int orig_irq = irq; | |
714 | ||
715 | if (irq == 0xffffffff) | |
716 | return irq; | |
717 | ||
718 | if (dp->irq_trans) { | |
719 | irq = dp->irq_trans->irq_build(dp, irq, | |
720 | dp->irq_trans->data); | |
a83f9823 DM |
721 | |
722 | if (of_irq_verbose) | |
723 | printk("%s: direct translate %x --> %x\n", | |
724 | dp->full_name, orig_irq, irq); | |
725 | ||
2b1e5978 DM |
726 | return irq; |
727 | } | |
728 | ||
729 | /* Something more complicated. Walk up to the root, applying | |
730 | * interrupt-map or bus specific translations, until we hit | |
731 | * an IRQ translator. | |
732 | * | |
733 | * If we hit a bus type or situation we cannot handle, we | |
734 | * stop and assume that the original IRQ number was in a | |
735 | * format which has special meaning to it's immediate parent. | |
736 | */ | |
737 | pp = dp->parent; | |
738 | ip = NULL; | |
739 | while (pp) { | |
740 | void *imap, *imsk; | |
741 | int imlen; | |
742 | ||
743 | imap = of_get_property(pp, "interrupt-map", &imlen); | |
744 | imsk = of_get_property(pp, "interrupt-map-mask", NULL); | |
745 | if (imap && imsk) { | |
746 | struct device_node *iret; | |
747 | int this_orig_irq = irq; | |
748 | ||
749 | iret = apply_interrupt_map(dp, pp, | |
750 | imap, imlen, imsk, | |
751 | &irq); | |
a83f9823 DM |
752 | |
753 | if (of_irq_verbose) | |
754 | printk("%s: Apply [%s:%x] imap --> [%s:%x]\n", | |
755 | op->node->full_name, | |
756 | pp->full_name, this_orig_irq, | |
757 | (iret ? iret->full_name : "NULL"), irq); | |
758 | ||
2b1e5978 DM |
759 | if (!iret) |
760 | break; | |
761 | ||
762 | if (iret->irq_trans) { | |
763 | ip = iret; | |
764 | break; | |
765 | } | |
766 | } else { | |
767 | if (!strcmp(pp->type, "pci") || | |
768 | !strcmp(pp->type, "pciex")) { | |
769 | unsigned int this_orig_irq = irq; | |
770 | ||
771 | irq = pci_irq_swizzle(dp, pp, irq); | |
a83f9823 DM |
772 | if (of_irq_verbose) |
773 | printk("%s: PCI swizzle [%s] " | |
774 | "%x --> %x\n", | |
775 | op->node->full_name, | |
776 | pp->full_name, this_orig_irq, | |
777 | irq); | |
778 | ||
2b1e5978 DM |
779 | } |
780 | ||
781 | if (pp->irq_trans) { | |
782 | ip = pp; | |
783 | break; | |
784 | } | |
785 | } | |
786 | dp = pp; | |
787 | pp = pp->parent; | |
788 | } | |
789 | if (!ip) | |
790 | return orig_irq; | |
791 | ||
792 | irq = ip->irq_trans->irq_build(op->node, irq, | |
793 | ip->irq_trans->data); | |
a83f9823 DM |
794 | if (of_irq_verbose) |
795 | printk("%s: Apply IRQ trans [%s] %x --> %x\n", | |
796 | op->node->full_name, ip->full_name, orig_irq, irq); | |
2b1e5978 DM |
797 | |
798 | return irq; | |
799 | } | |
800 | ||
cf44bbc2 DM |
801 | static struct of_device * __init scan_one_device(struct device_node *dp, |
802 | struct device *parent) | |
803 | { | |
804 | struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL); | |
805 | unsigned int *irq; | |
2b1e5978 | 806 | int len, i; |
cf44bbc2 DM |
807 | |
808 | if (!op) | |
809 | return NULL; | |
810 | ||
811 | op->node = dp; | |
812 | ||
813 | op->clock_freq = of_getintprop_default(dp, "clock-frequency", | |
814 | (25*1000*1000)); | |
815 | op->portid = of_getintprop_default(dp, "upa-portid", -1); | |
816 | if (op->portid == -1) | |
817 | op->portid = of_getintprop_default(dp, "portid", -1); | |
818 | ||
819 | irq = of_get_property(dp, "interrupts", &len); | |
2b1e5978 DM |
820 | if (irq) { |
821 | memcpy(op->irqs, irq, len); | |
822 | op->num_irqs = len / 4; | |
823 | } else { | |
824 | op->num_irqs = 0; | |
825 | } | |
cf44bbc2 | 826 | |
46ba6d7d DM |
827 | /* Prevent overruning the op->irqs[] array. */ |
828 | if (op->num_irqs > PROMINTR_MAX) { | |
829 | printk(KERN_WARNING "%s: Too many irqs (%d), " | |
830 | "limiting to %d.\n", | |
831 | dp->full_name, op->num_irqs, PROMINTR_MAX); | |
832 | op->num_irqs = PROMINTR_MAX; | |
833 | } | |
834 | ||
cf44bbc2 | 835 | build_device_resources(op, parent); |
2b1e5978 DM |
836 | for (i = 0; i < op->num_irqs; i++) |
837 | op->irqs[i] = build_one_device_irq(op, parent, op->irqs[i]); | |
cf44bbc2 DM |
838 | |
839 | op->dev.parent = parent; | |
840 | op->dev.bus = &of_bus_type; | |
841 | if (!parent) | |
842 | strcpy(op->dev.bus_id, "root"); | |
843 | else | |
4b75eb2b | 844 | sprintf(op->dev.bus_id, "%s@%08x", dp->name, dp->node); |
cf44bbc2 DM |
845 | |
846 | if (of_device_register(op)) { | |
847 | printk("%s: Could not register of device.\n", | |
848 | dp->full_name); | |
849 | kfree(op); | |
850 | op = NULL; | |
851 | } | |
852 | ||
853 | return op; | |
854 | } | |
855 | ||
856 | static void __init scan_tree(struct device_node *dp, struct device *parent) | |
857 | { | |
858 | while (dp) { | |
859 | struct of_device *op = scan_one_device(dp, parent); | |
860 | ||
861 | if (op) | |
862 | scan_tree(dp->child, &op->dev); | |
863 | ||
864 | dp = dp->sibling; | |
865 | } | |
866 | } | |
867 | ||
868 | static void __init scan_of_devices(void) | |
869 | { | |
870 | struct device_node *root = of_find_node_by_path("/"); | |
871 | struct of_device *parent; | |
872 | ||
873 | parent = scan_one_device(root, NULL); | |
874 | if (!parent) | |
875 | return; | |
876 | ||
877 | scan_tree(root->child, &parent->dev); | |
878 | } | |
879 | ||
a2bd4fd1 DM |
880 | static int __init of_bus_driver_init(void) |
881 | { | |
cf44bbc2 | 882 | int err; |
a2bd4fd1 | 883 | |
cf44bbc2 | 884 | err = bus_register(&of_bus_type); |
a2bd4fd1 DM |
885 | #ifdef CONFIG_PCI |
886 | if (!err) | |
887 | err = bus_register(&isa_bus_type); | |
888 | if (!err) | |
889 | err = bus_register(&ebus_bus_type); | |
890 | #endif | |
891 | #ifdef CONFIG_SBUS | |
892 | if (!err) | |
893 | err = bus_register(&sbus_bus_type); | |
894 | #endif | |
cf44bbc2 DM |
895 | |
896 | if (!err) | |
897 | scan_of_devices(); | |
898 | ||
899 | return err; | |
a2bd4fd1 DM |
900 | } |
901 | ||
902 | postcore_initcall(of_bus_driver_init); | |
903 | ||
a83f9823 DM |
904 | static int __init of_debug(char *str) |
905 | { | |
906 | int val = 0; | |
907 | ||
908 | get_option(&str, &val); | |
909 | if (val & 1) | |
910 | of_resource_verbose = 1; | |
911 | if (val & 2) | |
912 | of_irq_verbose = 1; | |
913 | return 1; | |
914 | } | |
915 | ||
916 | __setup("of_debug=", of_debug); | |
917 | ||
a2bd4fd1 DM |
918 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) |
919 | { | |
920 | /* initialize common driver fields */ | |
921 | drv->driver.name = drv->name; | |
922 | drv->driver.bus = bus; | |
923 | ||
924 | /* register with core */ | |
925 | return driver_register(&drv->driver); | |
926 | } | |
927 | ||
928 | void of_unregister_driver(struct of_platform_driver *drv) | |
929 | { | |
930 | driver_unregister(&drv->driver); | |
931 | } | |
932 | ||
933 | ||
934 | static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf) | |
935 | { | |
936 | struct of_device *ofdev; | |
937 | ||
938 | ofdev = to_of_device(dev); | |
939 | return sprintf(buf, "%s", ofdev->node->full_name); | |
940 | } | |
941 | ||
942 | static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL); | |
943 | ||
944 | /** | |
945 | * of_release_dev - free an of device structure when all users of it are finished. | |
946 | * @dev: device that's been disconnected | |
947 | * | |
948 | * Will be called only by the device core when all users of this of device are | |
949 | * done. | |
950 | */ | |
951 | void of_release_dev(struct device *dev) | |
952 | { | |
953 | struct of_device *ofdev; | |
954 | ||
955 | ofdev = to_of_device(dev); | |
956 | ||
957 | kfree(ofdev); | |
958 | } | |
959 | ||
960 | int of_device_register(struct of_device *ofdev) | |
961 | { | |
962 | int rc; | |
963 | ||
964 | BUG_ON(ofdev->node == NULL); | |
965 | ||
966 | rc = device_register(&ofdev->dev); | |
967 | if (rc) | |
968 | return rc; | |
969 | ||
6cc8b6f5 AM |
970 | rc = device_create_file(&ofdev->dev, &dev_attr_devspec); |
971 | if (rc) | |
972 | device_unregister(&ofdev->dev); | |
a2bd4fd1 | 973 | |
6cc8b6f5 | 974 | return rc; |
a2bd4fd1 DM |
975 | } |
976 | ||
977 | void of_device_unregister(struct of_device *ofdev) | |
978 | { | |
979 | device_remove_file(&ofdev->dev, &dev_attr_devspec); | |
980 | device_unregister(&ofdev->dev); | |
981 | } | |
982 | ||
983 | struct of_device* of_platform_device_create(struct device_node *np, | |
984 | const char *bus_id, | |
985 | struct device *parent, | |
986 | struct bus_type *bus) | |
987 | { | |
988 | struct of_device *dev; | |
989 | ||
990 | dev = kmalloc(sizeof(*dev), GFP_KERNEL); | |
991 | if (!dev) | |
992 | return NULL; | |
993 | memset(dev, 0, sizeof(*dev)); | |
994 | ||
995 | dev->dev.parent = parent; | |
996 | dev->dev.bus = bus; | |
997 | dev->dev.release = of_release_dev; | |
998 | ||
999 | strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE); | |
1000 | ||
1001 | if (of_device_register(dev) != 0) { | |
1002 | kfree(dev); | |
1003 | return NULL; | |
1004 | } | |
1005 | ||
1006 | return dev; | |
1007 | } | |
1008 | ||
1009 | EXPORT_SYMBOL(of_match_device); | |
1010 | EXPORT_SYMBOL(of_register_driver); | |
1011 | EXPORT_SYMBOL(of_unregister_driver); | |
1012 | EXPORT_SYMBOL(of_device_register); | |
1013 | EXPORT_SYMBOL(of_device_unregister); | |
1014 | EXPORT_SYMBOL(of_dev_get); | |
1015 | EXPORT_SYMBOL(of_dev_put); | |
1016 | EXPORT_SYMBOL(of_platform_device_create); | |
1017 | EXPORT_SYMBOL(of_release_dev); |