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a2bd4fd1 DM |
1 | #include <linux/config.h> |
2 | #include <linux/string.h> | |
3 | #include <linux/kernel.h> | |
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 | ||
12 | /** | |
13 | * of_match_device - Tell if an of_device structure has a matching | |
14 | * of_match structure | |
15 | * @ids: array of of device match structures to search in | |
16 | * @dev: the of device structure to match against | |
17 | * | |
18 | * Used by a driver to check whether an of_device present in the | |
19 | * system is in its list of supported devices. | |
20 | */ | |
21 | const struct of_device_id *of_match_device(const struct of_device_id *matches, | |
22 | const struct of_device *dev) | |
23 | { | |
24 | if (!dev->node) | |
25 | return NULL; | |
26 | while (matches->name[0] || matches->type[0] || matches->compatible[0]) { | |
27 | int match = 1; | |
28 | if (matches->name[0]) | |
29 | match &= dev->node->name | |
30 | && !strcmp(matches->name, dev->node->name); | |
31 | if (matches->type[0]) | |
32 | match &= dev->node->type | |
33 | && !strcmp(matches->type, dev->node->type); | |
34 | if (matches->compatible[0]) | |
35 | match &= of_device_is_compatible(dev->node, | |
36 | matches->compatible); | |
37 | if (match) | |
38 | return matches; | |
39 | matches++; | |
40 | } | |
41 | return NULL; | |
42 | } | |
43 | ||
44 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) | |
45 | { | |
46 | struct of_device * of_dev = to_of_device(dev); | |
47 | struct of_platform_driver * of_drv = to_of_platform_driver(drv); | |
48 | const struct of_device_id * matches = of_drv->match_table; | |
49 | ||
50 | if (!matches) | |
51 | return 0; | |
52 | ||
53 | return of_match_device(matches, of_dev) != NULL; | |
54 | } | |
55 | ||
56 | struct of_device *of_dev_get(struct of_device *dev) | |
57 | { | |
58 | struct device *tmp; | |
59 | ||
60 | if (!dev) | |
61 | return NULL; | |
62 | tmp = get_device(&dev->dev); | |
63 | if (tmp) | |
64 | return to_of_device(tmp); | |
65 | else | |
66 | return NULL; | |
67 | } | |
68 | ||
69 | void of_dev_put(struct of_device *dev) | |
70 | { | |
71 | if (dev) | |
72 | put_device(&dev->dev); | |
73 | } | |
74 | ||
75 | ||
76 | static int of_device_probe(struct device *dev) | |
77 | { | |
78 | int error = -ENODEV; | |
79 | struct of_platform_driver *drv; | |
80 | struct of_device *of_dev; | |
81 | const struct of_device_id *match; | |
82 | ||
83 | drv = to_of_platform_driver(dev->driver); | |
84 | of_dev = to_of_device(dev); | |
85 | ||
86 | if (!drv->probe) | |
87 | return error; | |
88 | ||
89 | of_dev_get(of_dev); | |
90 | ||
91 | match = of_match_device(drv->match_table, of_dev); | |
92 | if (match) | |
93 | error = drv->probe(of_dev, match); | |
94 | if (error) | |
95 | of_dev_put(of_dev); | |
96 | ||
97 | return error; | |
98 | } | |
99 | ||
100 | static int of_device_remove(struct device *dev) | |
101 | { | |
102 | struct of_device * of_dev = to_of_device(dev); | |
103 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
104 | ||
105 | if (dev->driver && drv->remove) | |
106 | drv->remove(of_dev); | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static int of_device_suspend(struct device *dev, pm_message_t state) | |
111 | { | |
112 | struct of_device * of_dev = to_of_device(dev); | |
113 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
114 | int error = 0; | |
115 | ||
116 | if (dev->driver && drv->suspend) | |
117 | error = drv->suspend(of_dev, state); | |
118 | return error; | |
119 | } | |
120 | ||
121 | static int of_device_resume(struct device * dev) | |
122 | { | |
123 | struct of_device * of_dev = to_of_device(dev); | |
124 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
125 | int error = 0; | |
126 | ||
127 | if (dev->driver && drv->resume) | |
128 | error = drv->resume(of_dev); | |
129 | return error; | |
130 | } | |
131 | ||
3ca9fab4 DM |
132 | void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name) |
133 | { | |
134 | unsigned long ret = res->start + offset; | |
135 | ||
136 | if (!request_region(ret, size, name)) | |
137 | ret = 0; | |
138 | ||
139 | return (void __iomem *) ret; | |
140 | } | |
141 | EXPORT_SYMBOL(of_ioremap); | |
142 | ||
143 | void of_iounmap(void __iomem *base, unsigned long size) | |
144 | { | |
145 | release_region((unsigned long) base, size); | |
146 | } | |
147 | EXPORT_SYMBOL(of_iounmap); | |
148 | ||
2b1e5978 DM |
149 | static int node_match(struct device *dev, void *data) |
150 | { | |
151 | struct of_device *op = to_of_device(dev); | |
152 | struct device_node *dp = data; | |
153 | ||
154 | return (op->node == dp); | |
155 | } | |
156 | ||
157 | struct of_device *of_find_device_by_node(struct device_node *dp) | |
158 | { | |
159 | struct device *dev = bus_find_device(&of_bus_type, NULL, | |
160 | dp, node_match); | |
161 | ||
162 | if (dev) | |
163 | return to_of_device(dev); | |
164 | ||
165 | return NULL; | |
166 | } | |
167 | EXPORT_SYMBOL(of_find_device_by_node); | |
168 | ||
a2bd4fd1 DM |
169 | #ifdef CONFIG_PCI |
170 | struct bus_type isa_bus_type = { | |
171 | .name = "isa", | |
172 | .match = of_platform_bus_match, | |
173 | .probe = of_device_probe, | |
174 | .remove = of_device_remove, | |
175 | .suspend = of_device_suspend, | |
176 | .resume = of_device_resume, | |
177 | }; | |
69853918 | 178 | EXPORT_SYMBOL(isa_bus_type); |
a2bd4fd1 DM |
179 | |
180 | struct bus_type ebus_bus_type = { | |
181 | .name = "ebus", | |
182 | .match = of_platform_bus_match, | |
183 | .probe = of_device_probe, | |
184 | .remove = of_device_remove, | |
185 | .suspend = of_device_suspend, | |
186 | .resume = of_device_resume, | |
187 | }; | |
69853918 | 188 | EXPORT_SYMBOL(ebus_bus_type); |
a2bd4fd1 DM |
189 | #endif |
190 | ||
191 | #ifdef CONFIG_SBUS | |
192 | struct bus_type sbus_bus_type = { | |
193 | .name = "sbus", | |
194 | .match = of_platform_bus_match, | |
195 | .probe = of_device_probe, | |
196 | .remove = of_device_remove, | |
197 | .suspend = of_device_suspend, | |
198 | .resume = of_device_resume, | |
199 | }; | |
69853918 | 200 | EXPORT_SYMBOL(sbus_bus_type); |
a2bd4fd1 DM |
201 | #endif |
202 | ||
cf44bbc2 DM |
203 | struct bus_type of_bus_type = { |
204 | .name = "of", | |
205 | .match = of_platform_bus_match, | |
206 | .probe = of_device_probe, | |
207 | .remove = of_device_remove, | |
208 | .suspend = of_device_suspend, | |
209 | .resume = of_device_resume, | |
210 | }; | |
211 | EXPORT_SYMBOL(of_bus_type); | |
212 | ||
213 | static inline u64 of_read_addr(u32 *cell, int size) | |
214 | { | |
215 | u64 r = 0; | |
216 | while (size--) | |
217 | r = (r << 32) | *(cell++); | |
218 | return r; | |
219 | } | |
220 | ||
221 | static void __init get_cells(struct device_node *dp, | |
222 | int *addrc, int *sizec) | |
223 | { | |
224 | if (addrc) | |
225 | *addrc = of_n_addr_cells(dp); | |
226 | if (sizec) | |
227 | *sizec = of_n_size_cells(dp); | |
228 | } | |
229 | ||
230 | /* Max address size we deal with */ | |
231 | #define OF_MAX_ADDR_CELLS 4 | |
232 | ||
233 | struct of_bus { | |
234 | const char *name; | |
235 | const char *addr_prop_name; | |
236 | int (*match)(struct device_node *parent); | |
237 | void (*count_cells)(struct device_node *child, | |
238 | int *addrc, int *sizec); | |
239 | u64 (*map)(u32 *addr, u32 *range, int na, int ns, int pna); | |
240 | int (*translate)(u32 *addr, u64 offset, int na); | |
241 | unsigned int (*get_flags)(u32 *addr); | |
242 | }; | |
243 | ||
244 | /* | |
245 | * Default translator (generic bus) | |
246 | */ | |
247 | ||
248 | static void of_bus_default_count_cells(struct device_node *dev, | |
249 | int *addrc, int *sizec) | |
250 | { | |
251 | get_cells(dev, addrc, sizec); | |
252 | } | |
253 | ||
254 | static u64 of_bus_default_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
255 | { | |
256 | u64 cp, s, da; | |
257 | ||
258 | cp = of_read_addr(range, na); | |
259 | s = of_read_addr(range + na + pna, ns); | |
260 | da = of_read_addr(addr, na); | |
261 | ||
262 | if (da < cp || da >= (cp + s)) | |
263 | return OF_BAD_ADDR; | |
264 | return da - cp; | |
265 | } | |
266 | ||
267 | static int of_bus_default_translate(u32 *addr, u64 offset, int na) | |
268 | { | |
269 | u64 a = of_read_addr(addr, na); | |
270 | memset(addr, 0, na * 4); | |
271 | a += offset; | |
272 | if (na > 1) | |
273 | addr[na - 2] = a >> 32; | |
274 | addr[na - 1] = a & 0xffffffffu; | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | static unsigned int of_bus_default_get_flags(u32 *addr) | |
280 | { | |
281 | return IORESOURCE_MEM; | |
282 | } | |
283 | ||
cf44bbc2 DM |
284 | /* |
285 | * PCI bus specific translator | |
286 | */ | |
287 | ||
288 | static int of_bus_pci_match(struct device_node *np) | |
289 | { | |
290 | return !strcmp(np->type, "pci") || !strcmp(np->type, "pciex"); | |
291 | } | |
292 | ||
293 | static void of_bus_pci_count_cells(struct device_node *np, | |
294 | int *addrc, int *sizec) | |
295 | { | |
296 | if (addrc) | |
297 | *addrc = 3; | |
298 | if (sizec) | |
299 | *sizec = 2; | |
300 | } | |
301 | ||
302 | static u64 of_bus_pci_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
303 | { | |
304 | u64 cp, s, da; | |
305 | ||
306 | /* Check address type match */ | |
307 | if ((addr[0] ^ range[0]) & 0x03000000) | |
308 | return OF_BAD_ADDR; | |
309 | ||
310 | /* Read address values, skipping high cell */ | |
311 | cp = of_read_addr(range + 1, na - 1); | |
312 | s = of_read_addr(range + na + pna, ns); | |
313 | da = of_read_addr(addr + 1, na - 1); | |
314 | ||
315 | if (da < cp || da >= (cp + s)) | |
316 | return OF_BAD_ADDR; | |
317 | return da - cp; | |
318 | } | |
319 | ||
320 | static int of_bus_pci_translate(u32 *addr, u64 offset, int na) | |
321 | { | |
322 | return of_bus_default_translate(addr + 1, offset, na - 1); | |
323 | } | |
324 | ||
325 | static unsigned int of_bus_pci_get_flags(u32 *addr) | |
326 | { | |
327 | unsigned int flags = 0; | |
328 | u32 w = addr[0]; | |
329 | ||
330 | switch((w >> 24) & 0x03) { | |
331 | case 0x01: | |
332 | flags |= IORESOURCE_IO; | |
333 | case 0x02: /* 32 bits */ | |
334 | case 0x03: /* 64 bits */ | |
335 | flags |= IORESOURCE_MEM; | |
336 | } | |
337 | if (w & 0x40000000) | |
338 | flags |= IORESOURCE_PREFETCH; | |
339 | return flags; | |
340 | } | |
341 | ||
342 | /* | |
343 | * ISA bus specific translator | |
344 | */ | |
345 | ||
346 | static int of_bus_isa_match(struct device_node *np) | |
347 | { | |
348 | return !strcmp(np->name, "isa"); | |
349 | } | |
350 | ||
351 | static void of_bus_isa_count_cells(struct device_node *child, | |
352 | int *addrc, int *sizec) | |
353 | { | |
354 | if (addrc) | |
355 | *addrc = 2; | |
356 | if (sizec) | |
357 | *sizec = 1; | |
358 | } | |
359 | ||
360 | static u64 of_bus_isa_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
361 | { | |
362 | u64 cp, s, da; | |
363 | ||
364 | /* Check address type match */ | |
365 | if ((addr[0] ^ range[0]) & 0x00000001) | |
366 | return OF_BAD_ADDR; | |
367 | ||
368 | /* Read address values, skipping high cell */ | |
369 | cp = of_read_addr(range + 1, na - 1); | |
370 | s = of_read_addr(range + na + pna, ns); | |
371 | da = of_read_addr(addr + 1, na - 1); | |
372 | ||
373 | if (da < cp || da >= (cp + s)) | |
374 | return OF_BAD_ADDR; | |
375 | return da - cp; | |
376 | } | |
377 | ||
378 | static int of_bus_isa_translate(u32 *addr, u64 offset, int na) | |
379 | { | |
380 | return of_bus_default_translate(addr + 1, offset, na - 1); | |
381 | } | |
382 | ||
383 | static unsigned int of_bus_isa_get_flags(u32 *addr) | |
384 | { | |
385 | unsigned int flags = 0; | |
386 | u32 w = addr[0]; | |
387 | ||
388 | if (w & 1) | |
389 | flags |= IORESOURCE_IO; | |
390 | else | |
391 | flags |= IORESOURCE_MEM; | |
392 | return flags; | |
393 | } | |
394 | ||
395 | /* | |
396 | * SBUS bus specific translator | |
397 | */ | |
398 | ||
399 | static int of_bus_sbus_match(struct device_node *np) | |
400 | { | |
401 | return !strcmp(np->name, "sbus") || | |
402 | !strcmp(np->name, "sbi"); | |
403 | } | |
404 | ||
405 | static void of_bus_sbus_count_cells(struct device_node *child, | |
406 | int *addrc, int *sizec) | |
407 | { | |
408 | if (addrc) | |
409 | *addrc = 2; | |
410 | if (sizec) | |
411 | *sizec = 1; | |
412 | } | |
413 | ||
414 | static u64 of_bus_sbus_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
415 | { | |
416 | return of_bus_default_map(addr, range, na, ns, pna); | |
417 | } | |
418 | ||
419 | static int of_bus_sbus_translate(u32 *addr, u64 offset, int na) | |
420 | { | |
421 | return of_bus_default_translate(addr, offset, na); | |
422 | } | |
423 | ||
424 | static unsigned int of_bus_sbus_get_flags(u32 *addr) | |
425 | { | |
426 | return IORESOURCE_MEM; | |
427 | } | |
428 | ||
429 | ||
430 | /* | |
431 | * Array of bus specific translators | |
432 | */ | |
433 | ||
434 | static struct of_bus of_busses[] = { | |
435 | /* PCI */ | |
436 | { | |
437 | .name = "pci", | |
438 | .addr_prop_name = "assigned-addresses", | |
439 | .match = of_bus_pci_match, | |
440 | .count_cells = of_bus_pci_count_cells, | |
441 | .map = of_bus_pci_map, | |
442 | .translate = of_bus_pci_translate, | |
443 | .get_flags = of_bus_pci_get_flags, | |
444 | }, | |
445 | /* ISA */ | |
446 | { | |
447 | .name = "isa", | |
448 | .addr_prop_name = "reg", | |
449 | .match = of_bus_isa_match, | |
450 | .count_cells = of_bus_isa_count_cells, | |
451 | .map = of_bus_isa_map, | |
452 | .translate = of_bus_isa_translate, | |
453 | .get_flags = of_bus_isa_get_flags, | |
454 | }, | |
455 | /* SBUS */ | |
456 | { | |
457 | .name = "sbus", | |
458 | .addr_prop_name = "reg", | |
459 | .match = of_bus_sbus_match, | |
460 | .count_cells = of_bus_sbus_count_cells, | |
461 | .map = of_bus_sbus_map, | |
462 | .translate = of_bus_sbus_translate, | |
463 | .get_flags = of_bus_sbus_get_flags, | |
464 | }, | |
465 | /* Default */ | |
466 | { | |
467 | .name = "default", | |
468 | .addr_prop_name = "reg", | |
469 | .match = NULL, | |
470 | .count_cells = of_bus_default_count_cells, | |
471 | .map = of_bus_default_map, | |
472 | .translate = of_bus_default_translate, | |
473 | .get_flags = of_bus_default_get_flags, | |
474 | }, | |
475 | }; | |
476 | ||
477 | static struct of_bus *of_match_bus(struct device_node *np) | |
478 | { | |
479 | int i; | |
480 | ||
481 | for (i = 0; i < ARRAY_SIZE(of_busses); i ++) | |
482 | if (!of_busses[i].match || of_busses[i].match(np)) | |
483 | return &of_busses[i]; | |
484 | BUG(); | |
485 | return NULL; | |
486 | } | |
487 | ||
488 | static int __init build_one_resource(struct device_node *parent, | |
489 | struct of_bus *bus, | |
490 | struct of_bus *pbus, | |
491 | u32 *addr, | |
492 | int na, int ns, int pna) | |
493 | { | |
494 | u32 *ranges; | |
495 | unsigned int rlen; | |
496 | int rone; | |
497 | u64 offset = OF_BAD_ADDR; | |
498 | ||
499 | ranges = of_get_property(parent, "ranges", &rlen); | |
500 | if (ranges == NULL || rlen == 0) { | |
501 | offset = of_read_addr(addr, na); | |
502 | memset(addr, 0, pna * 4); | |
503 | goto finish; | |
504 | } | |
505 | ||
506 | /* Now walk through the ranges */ | |
507 | rlen /= 4; | |
508 | rone = na + pna + ns; | |
509 | for (; rlen >= rone; rlen -= rone, ranges += rone) { | |
510 | offset = bus->map(addr, ranges, na, ns, pna); | |
511 | if (offset != OF_BAD_ADDR) | |
512 | break; | |
513 | } | |
514 | if (offset == OF_BAD_ADDR) | |
515 | return 1; | |
516 | ||
517 | memcpy(addr, ranges + na, 4 * pna); | |
518 | ||
519 | finish: | |
520 | /* Translate it into parent bus space */ | |
521 | return pbus->translate(addr, offset, pna); | |
522 | } | |
523 | ||
524 | static void __init build_device_resources(struct of_device *op, | |
525 | struct device *parent) | |
526 | { | |
527 | struct of_device *p_op; | |
528 | struct of_bus *bus; | |
529 | int na, ns; | |
530 | int index, num_reg; | |
531 | void *preg; | |
532 | ||
533 | if (!parent) | |
534 | return; | |
535 | ||
536 | p_op = to_of_device(parent); | |
537 | bus = of_match_bus(p_op->node); | |
538 | bus->count_cells(op->node, &na, &ns); | |
539 | ||
540 | preg = of_get_property(op->node, bus->addr_prop_name, &num_reg); | |
541 | if (!preg || num_reg == 0) | |
542 | return; | |
543 | ||
544 | /* Convert to num-cells. */ | |
545 | num_reg /= 4; | |
546 | ||
547 | /* Conver to num-entries. */ | |
548 | num_reg /= na + ns; | |
549 | ||
550 | for (index = 0; index < num_reg; index++) { | |
551 | struct resource *r = &op->resource[index]; | |
552 | u32 addr[OF_MAX_ADDR_CELLS]; | |
553 | u32 *reg = (preg + (index * ((na + ns) * 4))); | |
554 | struct device_node *dp = op->node; | |
555 | struct device_node *pp = p_op->node; | |
556 | struct of_bus *pbus; | |
557 | u64 size, result = OF_BAD_ADDR; | |
558 | unsigned long flags; | |
559 | int dna, dns; | |
560 | int pna, pns; | |
561 | ||
562 | size = of_read_addr(reg + na, ns); | |
563 | flags = bus->get_flags(reg); | |
564 | ||
565 | memcpy(addr, reg, na * 4); | |
566 | ||
567 | /* If the immediate parent has no ranges property to apply, | |
568 | * just use a 1<->1 mapping. Unless it is the 'dma' child | |
569 | * of an isa bus, which must be passed up towards the root. | |
570 | * | |
571 | * Also, don't try to translate PMU bus device registers. | |
572 | */ | |
573 | if ((of_find_property(pp, "ranges", NULL) == NULL && | |
574 | strcmp(pp->name, "dma") != 0) || | |
575 | !strcmp(pp->name, "pmu")) { | |
576 | result = of_read_addr(addr, na); | |
577 | goto build_res; | |
578 | } | |
579 | ||
580 | dna = na; | |
581 | dns = ns; | |
582 | ||
583 | while (1) { | |
584 | dp = pp; | |
585 | pp = dp->parent; | |
586 | if (!pp) { | |
587 | result = of_read_addr(addr, dna); | |
588 | break; | |
589 | } | |
590 | ||
591 | pbus = of_match_bus(pp); | |
592 | pbus->count_cells(dp, &pna, &pns); | |
593 | ||
594 | if (build_one_resource(dp, bus, pbus, addr, dna, dns, pna)) | |
595 | break; | |
596 | ||
597 | dna = pna; | |
598 | dns = pns; | |
599 | bus = pbus; | |
600 | } | |
601 | ||
602 | build_res: | |
603 | memset(r, 0, sizeof(*r)); | |
604 | if (result != OF_BAD_ADDR) { | |
1815aed5 DM |
605 | if (tlb_type == hypervisor) |
606 | result &= 0x0fffffffffffffffUL; | |
607 | ||
cf44bbc2 DM |
608 | r->start = result; |
609 | r->end = result + size - 1; | |
610 | r->flags = flags; | |
611 | } else { | |
612 | r->start = ~0UL; | |
613 | r->end = ~0UL; | |
614 | } | |
615 | r->name = op->node->name; | |
616 | } | |
617 | } | |
618 | ||
2b1e5978 DM |
619 | static struct device_node * __init |
620 | apply_interrupt_map(struct device_node *dp, struct device_node *pp, | |
621 | u32 *imap, int imlen, u32 *imask, | |
622 | unsigned int *irq_p) | |
623 | { | |
624 | struct device_node *cp; | |
625 | unsigned int irq = *irq_p; | |
626 | struct of_bus *bus; | |
627 | phandle handle; | |
628 | u32 *reg; | |
629 | int na, num_reg, i; | |
630 | ||
631 | bus = of_match_bus(pp); | |
632 | bus->count_cells(dp, &na, NULL); | |
633 | ||
634 | reg = of_get_property(dp, "reg", &num_reg); | |
635 | if (!reg || !num_reg) | |
636 | return NULL; | |
637 | ||
638 | imlen /= ((na + 3) * 4); | |
639 | handle = 0; | |
640 | for (i = 0; i < imlen; i++) { | |
641 | int j; | |
642 | ||
643 | for (j = 0; j < na; j++) { | |
644 | if ((reg[j] & imask[j]) != imap[j]) | |
645 | goto next; | |
646 | } | |
647 | if (imap[na] == irq) { | |
648 | handle = imap[na + 1]; | |
649 | irq = imap[na + 2]; | |
650 | break; | |
651 | } | |
652 | ||
653 | next: | |
654 | imap += (na + 3); | |
655 | } | |
656 | if (i == imlen) | |
657 | return NULL; | |
658 | ||
659 | *irq_p = irq; | |
660 | cp = of_find_node_by_phandle(handle); | |
661 | ||
662 | return cp; | |
663 | } | |
664 | ||
665 | static unsigned int __init pci_irq_swizzle(struct device_node *dp, | |
666 | struct device_node *pp, | |
667 | unsigned int irq) | |
668 | { | |
669 | struct linux_prom_pci_registers *regs; | |
670 | unsigned int devfn, slot, ret; | |
671 | ||
672 | if (irq < 1 || irq > 4) | |
673 | return irq; | |
674 | ||
675 | regs = of_get_property(dp, "reg", NULL); | |
676 | if (!regs) | |
677 | return irq; | |
678 | ||
679 | devfn = (regs->phys_hi >> 8) & 0xff; | |
680 | slot = (devfn >> 3) & 0x1f; | |
681 | ||
682 | ret = ((irq - 1 + (slot & 3)) & 3) + 1; | |
683 | ||
684 | return ret; | |
685 | } | |
686 | ||
687 | static unsigned int __init build_one_device_irq(struct of_device *op, | |
688 | struct device *parent, | |
689 | unsigned int irq) | |
690 | { | |
691 | struct device_node *dp = op->node; | |
692 | struct device_node *pp, *ip; | |
693 | unsigned int orig_irq = irq; | |
694 | ||
695 | if (irq == 0xffffffff) | |
696 | return irq; | |
697 | ||
698 | if (dp->irq_trans) { | |
699 | irq = dp->irq_trans->irq_build(dp, irq, | |
700 | dp->irq_trans->data); | |
701 | #if 1 | |
702 | printk("%s: direct translate %x --> %x\n", | |
703 | dp->full_name, orig_irq, irq); | |
704 | #endif | |
705 | return irq; | |
706 | } | |
707 | ||
708 | /* Something more complicated. Walk up to the root, applying | |
709 | * interrupt-map or bus specific translations, until we hit | |
710 | * an IRQ translator. | |
711 | * | |
712 | * If we hit a bus type or situation we cannot handle, we | |
713 | * stop and assume that the original IRQ number was in a | |
714 | * format which has special meaning to it's immediate parent. | |
715 | */ | |
716 | pp = dp->parent; | |
717 | ip = NULL; | |
718 | while (pp) { | |
719 | void *imap, *imsk; | |
720 | int imlen; | |
721 | ||
722 | imap = of_get_property(pp, "interrupt-map", &imlen); | |
723 | imsk = of_get_property(pp, "interrupt-map-mask", NULL); | |
724 | if (imap && imsk) { | |
725 | struct device_node *iret; | |
726 | int this_orig_irq = irq; | |
727 | ||
728 | iret = apply_interrupt_map(dp, pp, | |
729 | imap, imlen, imsk, | |
730 | &irq); | |
731 | #if 1 | |
732 | printk("%s: Apply [%s:%x] imap --> [%s:%x]\n", | |
733 | op->node->full_name, | |
734 | pp->full_name, this_orig_irq, | |
735 | (iret ? iret->full_name : "NULL"), irq); | |
736 | #endif | |
737 | if (!iret) | |
738 | break; | |
739 | ||
740 | if (iret->irq_trans) { | |
741 | ip = iret; | |
742 | break; | |
743 | } | |
744 | } else { | |
745 | if (!strcmp(pp->type, "pci") || | |
746 | !strcmp(pp->type, "pciex")) { | |
747 | unsigned int this_orig_irq = irq; | |
748 | ||
749 | irq = pci_irq_swizzle(dp, pp, irq); | |
750 | #if 1 | |
751 | printk("%s: PCI swizzle [%s] %x --> %x\n", | |
752 | op->node->full_name, | |
753 | pp->full_name, this_orig_irq, irq); | |
754 | #endif | |
755 | } | |
756 | ||
757 | if (pp->irq_trans) { | |
758 | ip = pp; | |
759 | break; | |
760 | } | |
761 | } | |
762 | dp = pp; | |
763 | pp = pp->parent; | |
764 | } | |
765 | if (!ip) | |
766 | return orig_irq; | |
767 | ||
768 | irq = ip->irq_trans->irq_build(op->node, irq, | |
769 | ip->irq_trans->data); | |
770 | #if 1 | |
771 | printk("%s: Apply IRQ trans [%s] %x --> %x\n", | |
772 | op->node->full_name, ip->full_name, orig_irq, irq); | |
773 | #endif | |
774 | ||
775 | return irq; | |
776 | } | |
777 | ||
cf44bbc2 DM |
778 | static struct of_device * __init scan_one_device(struct device_node *dp, |
779 | struct device *parent) | |
780 | { | |
781 | struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL); | |
782 | unsigned int *irq; | |
2b1e5978 | 783 | int len, i; |
cf44bbc2 DM |
784 | |
785 | if (!op) | |
786 | return NULL; | |
787 | ||
788 | op->node = dp; | |
789 | ||
790 | op->clock_freq = of_getintprop_default(dp, "clock-frequency", | |
791 | (25*1000*1000)); | |
792 | op->portid = of_getintprop_default(dp, "upa-portid", -1); | |
793 | if (op->portid == -1) | |
794 | op->portid = of_getintprop_default(dp, "portid", -1); | |
795 | ||
796 | irq = of_get_property(dp, "interrupts", &len); | |
2b1e5978 DM |
797 | if (irq) { |
798 | memcpy(op->irqs, irq, len); | |
799 | op->num_irqs = len / 4; | |
800 | } else { | |
801 | op->num_irqs = 0; | |
802 | } | |
cf44bbc2 DM |
803 | |
804 | build_device_resources(op, parent); | |
2b1e5978 DM |
805 | for (i = 0; i < op->num_irqs; i++) |
806 | op->irqs[i] = build_one_device_irq(op, parent, op->irqs[i]); | |
cf44bbc2 DM |
807 | |
808 | op->dev.parent = parent; | |
809 | op->dev.bus = &of_bus_type; | |
810 | if (!parent) | |
811 | strcpy(op->dev.bus_id, "root"); | |
812 | else | |
813 | strcpy(op->dev.bus_id, dp->path_component_name); | |
814 | ||
815 | if (of_device_register(op)) { | |
816 | printk("%s: Could not register of device.\n", | |
817 | dp->full_name); | |
818 | kfree(op); | |
819 | op = NULL; | |
820 | } | |
821 | ||
822 | return op; | |
823 | } | |
824 | ||
825 | static void __init scan_tree(struct device_node *dp, struct device *parent) | |
826 | { | |
827 | while (dp) { | |
828 | struct of_device *op = scan_one_device(dp, parent); | |
829 | ||
830 | if (op) | |
831 | scan_tree(dp->child, &op->dev); | |
832 | ||
833 | dp = dp->sibling; | |
834 | } | |
835 | } | |
836 | ||
837 | static void __init scan_of_devices(void) | |
838 | { | |
839 | struct device_node *root = of_find_node_by_path("/"); | |
840 | struct of_device *parent; | |
841 | ||
842 | parent = scan_one_device(root, NULL); | |
843 | if (!parent) | |
844 | return; | |
845 | ||
846 | scan_tree(root->child, &parent->dev); | |
847 | } | |
848 | ||
a2bd4fd1 DM |
849 | static int __init of_bus_driver_init(void) |
850 | { | |
cf44bbc2 | 851 | int err; |
a2bd4fd1 | 852 | |
cf44bbc2 | 853 | err = bus_register(&of_bus_type); |
a2bd4fd1 DM |
854 | #ifdef CONFIG_PCI |
855 | if (!err) | |
856 | err = bus_register(&isa_bus_type); | |
857 | if (!err) | |
858 | err = bus_register(&ebus_bus_type); | |
859 | #endif | |
860 | #ifdef CONFIG_SBUS | |
861 | if (!err) | |
862 | err = bus_register(&sbus_bus_type); | |
863 | #endif | |
cf44bbc2 DM |
864 | |
865 | if (!err) | |
866 | scan_of_devices(); | |
867 | ||
868 | return err; | |
a2bd4fd1 DM |
869 | } |
870 | ||
871 | postcore_initcall(of_bus_driver_init); | |
872 | ||
873 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) | |
874 | { | |
875 | /* initialize common driver fields */ | |
876 | drv->driver.name = drv->name; | |
877 | drv->driver.bus = bus; | |
878 | ||
879 | /* register with core */ | |
880 | return driver_register(&drv->driver); | |
881 | } | |
882 | ||
883 | void of_unregister_driver(struct of_platform_driver *drv) | |
884 | { | |
885 | driver_unregister(&drv->driver); | |
886 | } | |
887 | ||
888 | ||
889 | static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf) | |
890 | { | |
891 | struct of_device *ofdev; | |
892 | ||
893 | ofdev = to_of_device(dev); | |
894 | return sprintf(buf, "%s", ofdev->node->full_name); | |
895 | } | |
896 | ||
897 | static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL); | |
898 | ||
899 | /** | |
900 | * of_release_dev - free an of device structure when all users of it are finished. | |
901 | * @dev: device that's been disconnected | |
902 | * | |
903 | * Will be called only by the device core when all users of this of device are | |
904 | * done. | |
905 | */ | |
906 | void of_release_dev(struct device *dev) | |
907 | { | |
908 | struct of_device *ofdev; | |
909 | ||
910 | ofdev = to_of_device(dev); | |
911 | ||
912 | kfree(ofdev); | |
913 | } | |
914 | ||
915 | int of_device_register(struct of_device *ofdev) | |
916 | { | |
917 | int rc; | |
918 | ||
919 | BUG_ON(ofdev->node == NULL); | |
920 | ||
921 | rc = device_register(&ofdev->dev); | |
922 | if (rc) | |
923 | return rc; | |
924 | ||
6cc8b6f5 AM |
925 | rc = device_create_file(&ofdev->dev, &dev_attr_devspec); |
926 | if (rc) | |
927 | device_unregister(&ofdev->dev); | |
a2bd4fd1 | 928 | |
6cc8b6f5 | 929 | return rc; |
a2bd4fd1 DM |
930 | } |
931 | ||
932 | void of_device_unregister(struct of_device *ofdev) | |
933 | { | |
934 | device_remove_file(&ofdev->dev, &dev_attr_devspec); | |
935 | device_unregister(&ofdev->dev); | |
936 | } | |
937 | ||
938 | struct of_device* of_platform_device_create(struct device_node *np, | |
939 | const char *bus_id, | |
940 | struct device *parent, | |
941 | struct bus_type *bus) | |
942 | { | |
943 | struct of_device *dev; | |
944 | ||
945 | dev = kmalloc(sizeof(*dev), GFP_KERNEL); | |
946 | if (!dev) | |
947 | return NULL; | |
948 | memset(dev, 0, sizeof(*dev)); | |
949 | ||
950 | dev->dev.parent = parent; | |
951 | dev->dev.bus = bus; | |
952 | dev->dev.release = of_release_dev; | |
953 | ||
954 | strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE); | |
955 | ||
956 | if (of_device_register(dev) != 0) { | |
957 | kfree(dev); | |
958 | return NULL; | |
959 | } | |
960 | ||
961 | return dev; | |
962 | } | |
963 | ||
964 | EXPORT_SYMBOL(of_match_device); | |
965 | EXPORT_SYMBOL(of_register_driver); | |
966 | EXPORT_SYMBOL(of_unregister_driver); | |
967 | EXPORT_SYMBOL(of_device_register); | |
968 | EXPORT_SYMBOL(of_device_unregister); | |
969 | EXPORT_SYMBOL(of_dev_get); | |
970 | EXPORT_SYMBOL(of_dev_put); | |
971 | EXPORT_SYMBOL(of_platform_device_create); | |
972 | EXPORT_SYMBOL(of_release_dev); |