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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 | ||
a2bd4fd1 DM |
149 | #ifdef CONFIG_PCI |
150 | struct bus_type isa_bus_type = { | |
151 | .name = "isa", | |
152 | .match = of_platform_bus_match, | |
153 | .probe = of_device_probe, | |
154 | .remove = of_device_remove, | |
155 | .suspend = of_device_suspend, | |
156 | .resume = of_device_resume, | |
157 | }; | |
69853918 | 158 | EXPORT_SYMBOL(isa_bus_type); |
a2bd4fd1 DM |
159 | |
160 | struct bus_type ebus_bus_type = { | |
161 | .name = "ebus", | |
162 | .match = of_platform_bus_match, | |
163 | .probe = of_device_probe, | |
164 | .remove = of_device_remove, | |
165 | .suspend = of_device_suspend, | |
166 | .resume = of_device_resume, | |
167 | }; | |
69853918 | 168 | EXPORT_SYMBOL(ebus_bus_type); |
a2bd4fd1 DM |
169 | #endif |
170 | ||
171 | #ifdef CONFIG_SBUS | |
172 | struct bus_type sbus_bus_type = { | |
173 | .name = "sbus", | |
174 | .match = of_platform_bus_match, | |
175 | .probe = of_device_probe, | |
176 | .remove = of_device_remove, | |
177 | .suspend = of_device_suspend, | |
178 | .resume = of_device_resume, | |
179 | }; | |
69853918 | 180 | EXPORT_SYMBOL(sbus_bus_type); |
a2bd4fd1 DM |
181 | #endif |
182 | ||
cf44bbc2 DM |
183 | struct bus_type of_bus_type = { |
184 | .name = "of", | |
185 | .match = of_platform_bus_match, | |
186 | .probe = of_device_probe, | |
187 | .remove = of_device_remove, | |
188 | .suspend = of_device_suspend, | |
189 | .resume = of_device_resume, | |
190 | }; | |
191 | EXPORT_SYMBOL(of_bus_type); | |
192 | ||
193 | static inline u64 of_read_addr(u32 *cell, int size) | |
194 | { | |
195 | u64 r = 0; | |
196 | while (size--) | |
197 | r = (r << 32) | *(cell++); | |
198 | return r; | |
199 | } | |
200 | ||
201 | static void __init get_cells(struct device_node *dp, | |
202 | int *addrc, int *sizec) | |
203 | { | |
204 | if (addrc) | |
205 | *addrc = of_n_addr_cells(dp); | |
206 | if (sizec) | |
207 | *sizec = of_n_size_cells(dp); | |
208 | } | |
209 | ||
210 | /* Max address size we deal with */ | |
211 | #define OF_MAX_ADDR_CELLS 4 | |
212 | ||
213 | struct of_bus { | |
214 | const char *name; | |
215 | const char *addr_prop_name; | |
216 | int (*match)(struct device_node *parent); | |
217 | void (*count_cells)(struct device_node *child, | |
218 | int *addrc, int *sizec); | |
219 | u64 (*map)(u32 *addr, u32 *range, int na, int ns, int pna); | |
220 | int (*translate)(u32 *addr, u64 offset, int na); | |
221 | unsigned int (*get_flags)(u32 *addr); | |
222 | }; | |
223 | ||
224 | /* | |
225 | * Default translator (generic bus) | |
226 | */ | |
227 | ||
228 | static void of_bus_default_count_cells(struct device_node *dev, | |
229 | int *addrc, int *sizec) | |
230 | { | |
231 | get_cells(dev, addrc, sizec); | |
232 | } | |
233 | ||
234 | static u64 of_bus_default_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
235 | { | |
236 | u64 cp, s, da; | |
237 | ||
238 | cp = of_read_addr(range, na); | |
239 | s = of_read_addr(range + na + pna, ns); | |
240 | da = of_read_addr(addr, na); | |
241 | ||
242 | if (da < cp || da >= (cp + s)) | |
243 | return OF_BAD_ADDR; | |
244 | return da - cp; | |
245 | } | |
246 | ||
247 | static int of_bus_default_translate(u32 *addr, u64 offset, int na) | |
248 | { | |
249 | u64 a = of_read_addr(addr, na); | |
250 | memset(addr, 0, na * 4); | |
251 | a += offset; | |
252 | if (na > 1) | |
253 | addr[na - 2] = a >> 32; | |
254 | addr[na - 1] = a & 0xffffffffu; | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | static unsigned int of_bus_default_get_flags(u32 *addr) | |
260 | { | |
261 | return IORESOURCE_MEM; | |
262 | } | |
263 | ||
264 | ||
265 | /* | |
266 | * PCI bus specific translator | |
267 | */ | |
268 | ||
269 | static int of_bus_pci_match(struct device_node *np) | |
270 | { | |
271 | return !strcmp(np->type, "pci") || !strcmp(np->type, "pciex"); | |
272 | } | |
273 | ||
274 | static void of_bus_pci_count_cells(struct device_node *np, | |
275 | int *addrc, int *sizec) | |
276 | { | |
277 | if (addrc) | |
278 | *addrc = 3; | |
279 | if (sizec) | |
280 | *sizec = 2; | |
281 | } | |
282 | ||
283 | static u64 of_bus_pci_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
284 | { | |
285 | u64 cp, s, da; | |
286 | ||
287 | /* Check address type match */ | |
288 | if ((addr[0] ^ range[0]) & 0x03000000) | |
289 | return OF_BAD_ADDR; | |
290 | ||
291 | /* Read address values, skipping high cell */ | |
292 | cp = of_read_addr(range + 1, na - 1); | |
293 | s = of_read_addr(range + na + pna, ns); | |
294 | da = of_read_addr(addr + 1, na - 1); | |
295 | ||
296 | if (da < cp || da >= (cp + s)) | |
297 | return OF_BAD_ADDR; | |
298 | return da - cp; | |
299 | } | |
300 | ||
301 | static int of_bus_pci_translate(u32 *addr, u64 offset, int na) | |
302 | { | |
303 | return of_bus_default_translate(addr + 1, offset, na - 1); | |
304 | } | |
305 | ||
306 | static unsigned int of_bus_pci_get_flags(u32 *addr) | |
307 | { | |
308 | unsigned int flags = 0; | |
309 | u32 w = addr[0]; | |
310 | ||
311 | switch((w >> 24) & 0x03) { | |
312 | case 0x01: | |
313 | flags |= IORESOURCE_IO; | |
314 | case 0x02: /* 32 bits */ | |
315 | case 0x03: /* 64 bits */ | |
316 | flags |= IORESOURCE_MEM; | |
317 | } | |
318 | if (w & 0x40000000) | |
319 | flags |= IORESOURCE_PREFETCH; | |
320 | return flags; | |
321 | } | |
322 | ||
323 | /* | |
324 | * ISA bus specific translator | |
325 | */ | |
326 | ||
327 | static int of_bus_isa_match(struct device_node *np) | |
328 | { | |
329 | return !strcmp(np->name, "isa"); | |
330 | } | |
331 | ||
332 | static void of_bus_isa_count_cells(struct device_node *child, | |
333 | int *addrc, int *sizec) | |
334 | { | |
335 | if (addrc) | |
336 | *addrc = 2; | |
337 | if (sizec) | |
338 | *sizec = 1; | |
339 | } | |
340 | ||
341 | static u64 of_bus_isa_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
342 | { | |
343 | u64 cp, s, da; | |
344 | ||
345 | /* Check address type match */ | |
346 | if ((addr[0] ^ range[0]) & 0x00000001) | |
347 | return OF_BAD_ADDR; | |
348 | ||
349 | /* Read address values, skipping high cell */ | |
350 | cp = of_read_addr(range + 1, na - 1); | |
351 | s = of_read_addr(range + na + pna, ns); | |
352 | da = of_read_addr(addr + 1, na - 1); | |
353 | ||
354 | if (da < cp || da >= (cp + s)) | |
355 | return OF_BAD_ADDR; | |
356 | return da - cp; | |
357 | } | |
358 | ||
359 | static int of_bus_isa_translate(u32 *addr, u64 offset, int na) | |
360 | { | |
361 | return of_bus_default_translate(addr + 1, offset, na - 1); | |
362 | } | |
363 | ||
364 | static unsigned int of_bus_isa_get_flags(u32 *addr) | |
365 | { | |
366 | unsigned int flags = 0; | |
367 | u32 w = addr[0]; | |
368 | ||
369 | if (w & 1) | |
370 | flags |= IORESOURCE_IO; | |
371 | else | |
372 | flags |= IORESOURCE_MEM; | |
373 | return flags; | |
374 | } | |
375 | ||
376 | /* | |
377 | * SBUS bus specific translator | |
378 | */ | |
379 | ||
380 | static int of_bus_sbus_match(struct device_node *np) | |
381 | { | |
382 | return !strcmp(np->name, "sbus") || | |
383 | !strcmp(np->name, "sbi"); | |
384 | } | |
385 | ||
386 | static void of_bus_sbus_count_cells(struct device_node *child, | |
387 | int *addrc, int *sizec) | |
388 | { | |
389 | if (addrc) | |
390 | *addrc = 2; | |
391 | if (sizec) | |
392 | *sizec = 1; | |
393 | } | |
394 | ||
395 | static u64 of_bus_sbus_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
396 | { | |
397 | return of_bus_default_map(addr, range, na, ns, pna); | |
398 | } | |
399 | ||
400 | static int of_bus_sbus_translate(u32 *addr, u64 offset, int na) | |
401 | { | |
402 | return of_bus_default_translate(addr, offset, na); | |
403 | } | |
404 | ||
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, | |
423 | .translate = of_bus_pci_translate, | |
424 | .get_flags = of_bus_pci_get_flags, | |
425 | }, | |
426 | /* ISA */ | |
427 | { | |
428 | .name = "isa", | |
429 | .addr_prop_name = "reg", | |
430 | .match = of_bus_isa_match, | |
431 | .count_cells = of_bus_isa_count_cells, | |
432 | .map = of_bus_isa_map, | |
433 | .translate = of_bus_isa_translate, | |
434 | .get_flags = of_bus_isa_get_flags, | |
435 | }, | |
436 | /* SBUS */ | |
437 | { | |
438 | .name = "sbus", | |
439 | .addr_prop_name = "reg", | |
440 | .match = of_bus_sbus_match, | |
441 | .count_cells = of_bus_sbus_count_cells, | |
442 | .map = of_bus_sbus_map, | |
443 | .translate = of_bus_sbus_translate, | |
444 | .get_flags = of_bus_sbus_get_flags, | |
445 | }, | |
446 | /* Default */ | |
447 | { | |
448 | .name = "default", | |
449 | .addr_prop_name = "reg", | |
450 | .match = NULL, | |
451 | .count_cells = of_bus_default_count_cells, | |
452 | .map = of_bus_default_map, | |
453 | .translate = of_bus_default_translate, | |
454 | .get_flags = of_bus_default_get_flags, | |
455 | }, | |
456 | }; | |
457 | ||
458 | static struct of_bus *of_match_bus(struct device_node *np) | |
459 | { | |
460 | int i; | |
461 | ||
462 | for (i = 0; i < ARRAY_SIZE(of_busses); i ++) | |
463 | if (!of_busses[i].match || of_busses[i].match(np)) | |
464 | return &of_busses[i]; | |
465 | BUG(); | |
466 | return NULL; | |
467 | } | |
468 | ||
469 | static int __init build_one_resource(struct device_node *parent, | |
470 | struct of_bus *bus, | |
471 | struct of_bus *pbus, | |
472 | u32 *addr, | |
473 | int na, int ns, int pna) | |
474 | { | |
475 | u32 *ranges; | |
476 | unsigned int rlen; | |
477 | int rone; | |
478 | u64 offset = OF_BAD_ADDR; | |
479 | ||
480 | ranges = of_get_property(parent, "ranges", &rlen); | |
481 | if (ranges == NULL || rlen == 0) { | |
482 | offset = of_read_addr(addr, na); | |
483 | memset(addr, 0, pna * 4); | |
484 | goto finish; | |
485 | } | |
486 | ||
487 | /* Now walk through the ranges */ | |
488 | rlen /= 4; | |
489 | rone = na + pna + ns; | |
490 | for (; rlen >= rone; rlen -= rone, ranges += rone) { | |
491 | offset = bus->map(addr, ranges, na, ns, pna); | |
492 | if (offset != OF_BAD_ADDR) | |
493 | break; | |
494 | } | |
495 | if (offset == OF_BAD_ADDR) | |
496 | return 1; | |
497 | ||
498 | memcpy(addr, ranges + na, 4 * pna); | |
499 | ||
500 | finish: | |
501 | /* Translate it into parent bus space */ | |
502 | return pbus->translate(addr, offset, pna); | |
503 | } | |
504 | ||
505 | static void __init build_device_resources(struct of_device *op, | |
506 | struct device *parent) | |
507 | { | |
508 | struct of_device *p_op; | |
509 | struct of_bus *bus; | |
510 | int na, ns; | |
511 | int index, num_reg; | |
512 | void *preg; | |
513 | ||
514 | if (!parent) | |
515 | return; | |
516 | ||
517 | p_op = to_of_device(parent); | |
518 | bus = of_match_bus(p_op->node); | |
519 | bus->count_cells(op->node, &na, &ns); | |
520 | ||
521 | preg = of_get_property(op->node, bus->addr_prop_name, &num_reg); | |
522 | if (!preg || num_reg == 0) | |
523 | return; | |
524 | ||
525 | /* Convert to num-cells. */ | |
526 | num_reg /= 4; | |
527 | ||
528 | /* Conver to num-entries. */ | |
529 | num_reg /= na + ns; | |
530 | ||
531 | for (index = 0; index < num_reg; index++) { | |
532 | struct resource *r = &op->resource[index]; | |
533 | u32 addr[OF_MAX_ADDR_CELLS]; | |
534 | u32 *reg = (preg + (index * ((na + ns) * 4))); | |
535 | struct device_node *dp = op->node; | |
536 | struct device_node *pp = p_op->node; | |
537 | struct of_bus *pbus; | |
538 | u64 size, result = OF_BAD_ADDR; | |
539 | unsigned long flags; | |
540 | int dna, dns; | |
541 | int pna, pns; | |
542 | ||
543 | size = of_read_addr(reg + na, ns); | |
544 | flags = bus->get_flags(reg); | |
545 | ||
546 | memcpy(addr, reg, na * 4); | |
547 | ||
548 | /* If the immediate parent has no ranges property to apply, | |
549 | * just use a 1<->1 mapping. Unless it is the 'dma' child | |
550 | * of an isa bus, which must be passed up towards the root. | |
551 | * | |
552 | * Also, don't try to translate PMU bus device registers. | |
553 | */ | |
554 | if ((of_find_property(pp, "ranges", NULL) == NULL && | |
555 | strcmp(pp->name, "dma") != 0) || | |
556 | !strcmp(pp->name, "pmu")) { | |
557 | result = of_read_addr(addr, na); | |
558 | goto build_res; | |
559 | } | |
560 | ||
561 | dna = na; | |
562 | dns = ns; | |
563 | ||
564 | while (1) { | |
565 | dp = pp; | |
566 | pp = dp->parent; | |
567 | if (!pp) { | |
568 | result = of_read_addr(addr, dna); | |
569 | break; | |
570 | } | |
571 | ||
572 | pbus = of_match_bus(pp); | |
573 | pbus->count_cells(dp, &pna, &pns); | |
574 | ||
575 | if (build_one_resource(dp, bus, pbus, addr, dna, dns, pna)) | |
576 | break; | |
577 | ||
578 | dna = pna; | |
579 | dns = pns; | |
580 | bus = pbus; | |
581 | } | |
582 | ||
583 | build_res: | |
584 | memset(r, 0, sizeof(*r)); | |
585 | if (result != OF_BAD_ADDR) { | |
586 | r->start = result; | |
587 | r->end = result + size - 1; | |
588 | r->flags = flags; | |
589 | } else { | |
590 | r->start = ~0UL; | |
591 | r->end = ~0UL; | |
592 | } | |
593 | r->name = op->node->name; | |
594 | } | |
595 | } | |
596 | ||
597 | static struct of_device * __init scan_one_device(struct device_node *dp, | |
598 | struct device *parent) | |
599 | { | |
600 | struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL); | |
601 | unsigned int *irq; | |
602 | int len; | |
603 | ||
604 | if (!op) | |
605 | return NULL; | |
606 | ||
607 | op->node = dp; | |
608 | ||
609 | op->clock_freq = of_getintprop_default(dp, "clock-frequency", | |
610 | (25*1000*1000)); | |
611 | op->portid = of_getintprop_default(dp, "upa-portid", -1); | |
612 | if (op->portid == -1) | |
613 | op->portid = of_getintprop_default(dp, "portid", -1); | |
614 | ||
615 | irq = of_get_property(dp, "interrupts", &len); | |
616 | if (irq) | |
617 | op->irq = *irq; | |
618 | else | |
619 | op->irq = 0xffffffff; | |
620 | ||
621 | build_device_resources(op, parent); | |
622 | ||
623 | op->dev.parent = parent; | |
624 | op->dev.bus = &of_bus_type; | |
625 | if (!parent) | |
626 | strcpy(op->dev.bus_id, "root"); | |
627 | else | |
628 | strcpy(op->dev.bus_id, dp->path_component_name); | |
629 | ||
630 | if (of_device_register(op)) { | |
631 | printk("%s: Could not register of device.\n", | |
632 | dp->full_name); | |
633 | kfree(op); | |
634 | op = NULL; | |
635 | } | |
636 | ||
637 | return op; | |
638 | } | |
639 | ||
640 | static void __init scan_tree(struct device_node *dp, struct device *parent) | |
641 | { | |
642 | while (dp) { | |
643 | struct of_device *op = scan_one_device(dp, parent); | |
644 | ||
645 | if (op) | |
646 | scan_tree(dp->child, &op->dev); | |
647 | ||
648 | dp = dp->sibling; | |
649 | } | |
650 | } | |
651 | ||
652 | static void __init scan_of_devices(void) | |
653 | { | |
654 | struct device_node *root = of_find_node_by_path("/"); | |
655 | struct of_device *parent; | |
656 | ||
657 | parent = scan_one_device(root, NULL); | |
658 | if (!parent) | |
659 | return; | |
660 | ||
661 | scan_tree(root->child, &parent->dev); | |
662 | } | |
663 | ||
a2bd4fd1 DM |
664 | static int __init of_bus_driver_init(void) |
665 | { | |
cf44bbc2 | 666 | int err; |
a2bd4fd1 | 667 | |
cf44bbc2 | 668 | err = bus_register(&of_bus_type); |
a2bd4fd1 DM |
669 | #ifdef CONFIG_PCI |
670 | if (!err) | |
671 | err = bus_register(&isa_bus_type); | |
672 | if (!err) | |
673 | err = bus_register(&ebus_bus_type); | |
674 | #endif | |
675 | #ifdef CONFIG_SBUS | |
676 | if (!err) | |
677 | err = bus_register(&sbus_bus_type); | |
678 | #endif | |
cf44bbc2 DM |
679 | |
680 | if (!err) | |
681 | scan_of_devices(); | |
682 | ||
683 | return err; | |
a2bd4fd1 DM |
684 | } |
685 | ||
686 | postcore_initcall(of_bus_driver_init); | |
687 | ||
688 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) | |
689 | { | |
690 | /* initialize common driver fields */ | |
691 | drv->driver.name = drv->name; | |
692 | drv->driver.bus = bus; | |
693 | ||
694 | /* register with core */ | |
695 | return driver_register(&drv->driver); | |
696 | } | |
697 | ||
698 | void of_unregister_driver(struct of_platform_driver *drv) | |
699 | { | |
700 | driver_unregister(&drv->driver); | |
701 | } | |
702 | ||
703 | ||
704 | static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf) | |
705 | { | |
706 | struct of_device *ofdev; | |
707 | ||
708 | ofdev = to_of_device(dev); | |
709 | return sprintf(buf, "%s", ofdev->node->full_name); | |
710 | } | |
711 | ||
712 | static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL); | |
713 | ||
714 | /** | |
715 | * of_release_dev - free an of device structure when all users of it are finished. | |
716 | * @dev: device that's been disconnected | |
717 | * | |
718 | * Will be called only by the device core when all users of this of device are | |
719 | * done. | |
720 | */ | |
721 | void of_release_dev(struct device *dev) | |
722 | { | |
723 | struct of_device *ofdev; | |
724 | ||
725 | ofdev = to_of_device(dev); | |
726 | ||
727 | kfree(ofdev); | |
728 | } | |
729 | ||
730 | int of_device_register(struct of_device *ofdev) | |
731 | { | |
732 | int rc; | |
733 | ||
734 | BUG_ON(ofdev->node == NULL); | |
735 | ||
736 | rc = device_register(&ofdev->dev); | |
737 | if (rc) | |
738 | return rc; | |
739 | ||
740 | device_create_file(&ofdev->dev, &dev_attr_devspec); | |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
745 | void of_device_unregister(struct of_device *ofdev) | |
746 | { | |
747 | device_remove_file(&ofdev->dev, &dev_attr_devspec); | |
748 | device_unregister(&ofdev->dev); | |
749 | } | |
750 | ||
751 | struct of_device* of_platform_device_create(struct device_node *np, | |
752 | const char *bus_id, | |
753 | struct device *parent, | |
754 | struct bus_type *bus) | |
755 | { | |
756 | struct of_device *dev; | |
757 | ||
758 | dev = kmalloc(sizeof(*dev), GFP_KERNEL); | |
759 | if (!dev) | |
760 | return NULL; | |
761 | memset(dev, 0, sizeof(*dev)); | |
762 | ||
763 | dev->dev.parent = parent; | |
764 | dev->dev.bus = bus; | |
765 | dev->dev.release = of_release_dev; | |
766 | ||
767 | strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE); | |
768 | ||
769 | if (of_device_register(dev) != 0) { | |
770 | kfree(dev); | |
771 | return NULL; | |
772 | } | |
773 | ||
774 | return dev; | |
775 | } | |
776 | ||
777 | EXPORT_SYMBOL(of_match_device); | |
778 | EXPORT_SYMBOL(of_register_driver); | |
779 | EXPORT_SYMBOL(of_unregister_driver); | |
780 | EXPORT_SYMBOL(of_device_register); | |
781 | EXPORT_SYMBOL(of_device_unregister); | |
782 | EXPORT_SYMBOL(of_dev_get); | |
783 | EXPORT_SYMBOL(of_dev_put); | |
784 | EXPORT_SYMBOL(of_platform_device_create); | |
785 | EXPORT_SYMBOL(of_release_dev); |