Commit | Line | Data |
---|---|---|
d1405b86 BH |
1 | #undef DEBUG |
2 | ||
3 | #include <linux/kernel.h> | |
4 | #include <linux/string.h> | |
5 | #include <linux/pci_regs.h> | |
6 | #include <linux/module.h> | |
d2dd482b | 7 | #include <linux/ioport.h> |
d1405b86 | 8 | #include <asm/prom.h> |
d2dd482b | 9 | #include <asm/pci-bridge.h> |
d1405b86 BH |
10 | |
11 | #ifdef DEBUG | |
12 | #define DBG(fmt...) do { printk(fmt); } while(0) | |
13 | #else | |
14 | #define DBG(fmt...) do { } while(0) | |
15 | #endif | |
16 | ||
17 | #ifdef CONFIG_PPC64 | |
18 | #define PRu64 "%lx" | |
19 | #else | |
20 | #define PRu64 "%llx" | |
21 | #endif | |
22 | ||
23 | /* Max address size we deal with */ | |
24 | #define OF_MAX_ADDR_CELLS 4 | |
25 | #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ | |
26 | (ns) > 0) | |
27 | ||
83efafb3 AF |
28 | static struct of_bus *of_match_bus(struct device_node *np); |
29 | static int __of_address_to_resource(struct device_node *dev, | |
30 | const u32 *addrp, u64 size, unsigned int flags, | |
31 | struct resource *r); | |
32 | ||
33 | ||
d1405b86 BH |
34 | /* Debug utility */ |
35 | #ifdef DEBUG | |
b5a1a9ab | 36 | static void of_dump_addr(const char *s, const u32 *addr, int na) |
d1405b86 BH |
37 | { |
38 | printk("%s", s); | |
39 | while(na--) | |
40 | printk(" %08x", *(addr++)); | |
41 | printk("\n"); | |
42 | } | |
43 | #else | |
b5a1a9ab | 44 | static void of_dump_addr(const char *s, const u32 *addr, int na) { } |
d1405b86 BH |
45 | #endif |
46 | ||
d1405b86 BH |
47 | |
48 | /* Callbacks for bus specific translators */ | |
49 | struct of_bus { | |
50 | const char *name; | |
51 | const char *addresses; | |
52 | int (*match)(struct device_node *parent); | |
53 | void (*count_cells)(struct device_node *child, | |
54 | int *addrc, int *sizec); | |
b5a1a9ab JK |
55 | u64 (*map)(u32 *addr, const u32 *range, |
56 | int na, int ns, int pna); | |
d1405b86 | 57 | int (*translate)(u32 *addr, u64 offset, int na); |
b5a1a9ab | 58 | unsigned int (*get_flags)(const u32 *addr); |
d1405b86 BH |
59 | }; |
60 | ||
61 | ||
62 | /* | |
63 | * Default translator (generic bus) | |
64 | */ | |
65 | ||
d2dd482b BH |
66 | static void of_bus_default_count_cells(struct device_node *dev, |
67 | int *addrc, int *sizec) | |
d1405b86 BH |
68 | { |
69 | if (addrc) | |
70 | *addrc = prom_n_addr_cells(dev); | |
71 | if (sizec) | |
72 | *sizec = prom_n_size_cells(dev); | |
73 | } | |
74 | ||
b5a1a9ab JK |
75 | static u64 of_bus_default_map(u32 *addr, const u32 *range, |
76 | int na, int ns, int pna) | |
d1405b86 BH |
77 | { |
78 | u64 cp, s, da; | |
79 | ||
cc9fd71c BH |
80 | cp = of_read_number(range, na); |
81 | s = of_read_number(range + na + pna, ns); | |
82 | da = of_read_number(addr, na); | |
d1405b86 BH |
83 | |
84 | DBG("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n", | |
85 | cp, s, da); | |
86 | ||
87 | if (da < cp || da >= (cp + s)) | |
88 | return OF_BAD_ADDR; | |
89 | return da - cp; | |
90 | } | |
91 | ||
d2dd482b | 92 | static int of_bus_default_translate(u32 *addr, u64 offset, int na) |
d1405b86 | 93 | { |
cc9fd71c | 94 | u64 a = of_read_number(addr, na); |
d1405b86 BH |
95 | memset(addr, 0, na * 4); |
96 | a += offset; | |
97 | if (na > 1) | |
98 | addr[na - 2] = a >> 32; | |
99 | addr[na - 1] = a & 0xffffffffu; | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
b5a1a9ab | 104 | static unsigned int of_bus_default_get_flags(const u32 *addr) |
d2dd482b BH |
105 | { |
106 | return IORESOURCE_MEM; | |
107 | } | |
108 | ||
d1405b86 | 109 | |
83efafb3 | 110 | #ifdef CONFIG_PCI |
d1405b86 BH |
111 | /* |
112 | * PCI bus specific translator | |
113 | */ | |
114 | ||
115 | static int of_bus_pci_match(struct device_node *np) | |
116 | { | |
d5f07900 PM |
117 | /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */ |
118 | return !strcmp(np->type, "pci") || !strcmp(np->type, "vci"); | |
d1405b86 BH |
119 | } |
120 | ||
121 | static void of_bus_pci_count_cells(struct device_node *np, | |
122 | int *addrc, int *sizec) | |
123 | { | |
124 | if (addrc) | |
125 | *addrc = 3; | |
126 | if (sizec) | |
127 | *sizec = 2; | |
128 | } | |
129 | ||
b5a1a9ab | 130 | static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna) |
d1405b86 BH |
131 | { |
132 | u64 cp, s, da; | |
133 | ||
134 | /* Check address type match */ | |
135 | if ((addr[0] ^ range[0]) & 0x03000000) | |
136 | return OF_BAD_ADDR; | |
137 | ||
138 | /* Read address values, skipping high cell */ | |
cc9fd71c BH |
139 | cp = of_read_number(range + 1, na - 1); |
140 | s = of_read_number(range + na + pna, ns); | |
141 | da = of_read_number(addr + 1, na - 1); | |
d1405b86 BH |
142 | |
143 | DBG("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da); | |
144 | ||
145 | if (da < cp || da >= (cp + s)) | |
146 | return OF_BAD_ADDR; | |
147 | return da - cp; | |
148 | } | |
149 | ||
150 | static int of_bus_pci_translate(u32 *addr, u64 offset, int na) | |
151 | { | |
d2dd482b BH |
152 | return of_bus_default_translate(addr + 1, offset, na - 1); |
153 | } | |
154 | ||
b5a1a9ab | 155 | static unsigned int of_bus_pci_get_flags(const u32 *addr) |
d2dd482b BH |
156 | { |
157 | unsigned int flags = 0; | |
158 | u32 w = addr[0]; | |
159 | ||
160 | switch((w >> 24) & 0x03) { | |
161 | case 0x01: | |
162 | flags |= IORESOURCE_IO; | |
4468f01d | 163 | break; |
d2dd482b BH |
164 | case 0x02: /* 32 bits */ |
165 | case 0x03: /* 64 bits */ | |
166 | flags |= IORESOURCE_MEM; | |
4468f01d | 167 | break; |
d2dd482b BH |
168 | } |
169 | if (w & 0x40000000) | |
170 | flags |= IORESOURCE_PREFETCH; | |
171 | return flags; | |
d1405b86 BH |
172 | } |
173 | ||
83efafb3 AF |
174 | const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size, |
175 | unsigned int *flags) | |
176 | { | |
177 | const u32 *prop; | |
178 | unsigned int psize; | |
179 | struct device_node *parent; | |
180 | struct of_bus *bus; | |
181 | int onesize, i, na, ns; | |
182 | ||
183 | /* Get parent & match bus type */ | |
184 | parent = of_get_parent(dev); | |
185 | if (parent == NULL) | |
186 | return NULL; | |
187 | bus = of_match_bus(parent); | |
188 | if (strcmp(bus->name, "pci")) { | |
189 | of_node_put(parent); | |
190 | return NULL; | |
191 | } | |
192 | bus->count_cells(dev, &na, &ns); | |
193 | of_node_put(parent); | |
194 | if (!OF_CHECK_COUNTS(na, ns)) | |
195 | return NULL; | |
196 | ||
197 | /* Get "reg" or "assigned-addresses" property */ | |
198 | prop = get_property(dev, bus->addresses, &psize); | |
199 | if (prop == NULL) | |
200 | return NULL; | |
201 | psize /= 4; | |
202 | ||
203 | onesize = na + ns; | |
204 | for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) | |
205 | if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) { | |
206 | if (size) | |
207 | *size = of_read_number(prop + na, ns); | |
208 | if (flags) | |
209 | *flags = bus->get_flags(prop); | |
210 | return prop; | |
211 | } | |
212 | return NULL; | |
213 | } | |
214 | EXPORT_SYMBOL(of_get_pci_address); | |
215 | ||
216 | int of_pci_address_to_resource(struct device_node *dev, int bar, | |
217 | struct resource *r) | |
218 | { | |
219 | const u32 *addrp; | |
220 | u64 size; | |
221 | unsigned int flags; | |
222 | ||
223 | addrp = of_get_pci_address(dev, bar, &size, &flags); | |
224 | if (addrp == NULL) | |
225 | return -EINVAL; | |
226 | return __of_address_to_resource(dev, addrp, size, flags, r); | |
227 | } | |
228 | EXPORT_SYMBOL_GPL(of_pci_address_to_resource); | |
229 | ||
230 | static u8 of_irq_pci_swizzle(u8 slot, u8 pin) | |
231 | { | |
232 | return (((pin - 1) + slot) % 4) + 1; | |
233 | } | |
234 | ||
235 | int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq) | |
236 | { | |
237 | struct device_node *dn, *ppnode; | |
238 | struct pci_dev *ppdev; | |
239 | u32 lspec; | |
240 | u32 laddr[3]; | |
241 | u8 pin; | |
242 | int rc; | |
243 | ||
244 | /* Check if we have a device node, if yes, fallback to standard OF | |
245 | * parsing | |
246 | */ | |
247 | dn = pci_device_to_OF_node(pdev); | |
248 | if (dn) | |
249 | return of_irq_map_one(dn, 0, out_irq); | |
250 | ||
251 | /* Ok, we don't, time to have fun. Let's start by building up an | |
252 | * interrupt spec. we assume #interrupt-cells is 1, which is standard | |
253 | * for PCI. If you do different, then don't use that routine. | |
254 | */ | |
255 | rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin); | |
256 | if (rc != 0) | |
257 | return rc; | |
258 | /* No pin, exit */ | |
259 | if (pin == 0) | |
260 | return -ENODEV; | |
261 | ||
262 | /* Now we walk up the PCI tree */ | |
263 | lspec = pin; | |
264 | for (;;) { | |
265 | /* Get the pci_dev of our parent */ | |
266 | ppdev = pdev->bus->self; | |
267 | ||
268 | /* Ouch, it's a host bridge... */ | |
269 | if (ppdev == NULL) { | |
270 | #ifdef CONFIG_PPC64 | |
271 | ppnode = pci_bus_to_OF_node(pdev->bus); | |
272 | #else | |
273 | struct pci_controller *host; | |
274 | host = pci_bus_to_host(pdev->bus); | |
275 | ppnode = host ? host->arch_data : NULL; | |
276 | #endif | |
277 | /* No node for host bridge ? give up */ | |
278 | if (ppnode == NULL) | |
279 | return -EINVAL; | |
280 | } else | |
281 | /* We found a P2P bridge, check if it has a node */ | |
282 | ppnode = pci_device_to_OF_node(ppdev); | |
283 | ||
284 | /* Ok, we have found a parent with a device-node, hand over to | |
285 | * the OF parsing code. | |
286 | * We build a unit address from the linux device to be used for | |
287 | * resolution. Note that we use the linux bus number which may | |
288 | * not match your firmware bus numbering. | |
289 | * Fortunately, in most cases, interrupt-map-mask doesn't include | |
290 | * the bus number as part of the matching. | |
291 | * You should still be careful about that though if you intend | |
292 | * to rely on this function (you ship a firmware that doesn't | |
293 | * create device nodes for all PCI devices). | |
294 | */ | |
295 | if (ppnode) | |
296 | break; | |
297 | ||
298 | /* We can only get here if we hit a P2P bridge with no node, | |
299 | * let's do standard swizzling and try again | |
300 | */ | |
301 | lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec); | |
302 | pdev = ppdev; | |
303 | } | |
304 | ||
305 | laddr[0] = (pdev->bus->number << 16) | |
306 | | (pdev->devfn << 8); | |
307 | laddr[1] = laddr[2] = 0; | |
308 | return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq); | |
309 | } | |
310 | EXPORT_SYMBOL_GPL(of_irq_map_pci); | |
311 | #endif /* CONFIG_PCI */ | |
312 | ||
d1405b86 BH |
313 | /* |
314 | * ISA bus specific translator | |
315 | */ | |
316 | ||
317 | static int of_bus_isa_match(struct device_node *np) | |
318 | { | |
319 | return !strcmp(np->name, "isa"); | |
320 | } | |
321 | ||
322 | static void of_bus_isa_count_cells(struct device_node *child, | |
323 | int *addrc, int *sizec) | |
324 | { | |
325 | if (addrc) | |
326 | *addrc = 2; | |
327 | if (sizec) | |
328 | *sizec = 1; | |
329 | } | |
330 | ||
b5a1a9ab | 331 | static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna) |
d1405b86 BH |
332 | { |
333 | u64 cp, s, da; | |
334 | ||
335 | /* Check address type match */ | |
336 | if ((addr[0] ^ range[0]) & 0x00000001) | |
337 | return OF_BAD_ADDR; | |
338 | ||
339 | /* Read address values, skipping high cell */ | |
cc9fd71c BH |
340 | cp = of_read_number(range + 1, na - 1); |
341 | s = of_read_number(range + na + pna, ns); | |
342 | da = of_read_number(addr + 1, na - 1); | |
d1405b86 BH |
343 | |
344 | DBG("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da); | |
345 | ||
346 | if (da < cp || da >= (cp + s)) | |
347 | return OF_BAD_ADDR; | |
348 | return da - cp; | |
349 | } | |
350 | ||
351 | static int of_bus_isa_translate(u32 *addr, u64 offset, int na) | |
352 | { | |
d2dd482b BH |
353 | return of_bus_default_translate(addr + 1, offset, na - 1); |
354 | } | |
355 | ||
b5a1a9ab | 356 | static unsigned int of_bus_isa_get_flags(const u32 *addr) |
d2dd482b BH |
357 | { |
358 | unsigned int flags = 0; | |
359 | u32 w = addr[0]; | |
360 | ||
361 | if (w & 1) | |
362 | flags |= IORESOURCE_IO; | |
363 | else | |
364 | flags |= IORESOURCE_MEM; | |
365 | return flags; | |
d1405b86 BH |
366 | } |
367 | ||
d2dd482b | 368 | |
d1405b86 BH |
369 | /* |
370 | * Array of bus specific translators | |
371 | */ | |
372 | ||
373 | static struct of_bus of_busses[] = { | |
83efafb3 | 374 | #ifdef CONFIG_PCI |
d1405b86 BH |
375 | /* PCI */ |
376 | { | |
377 | .name = "pci", | |
378 | .addresses = "assigned-addresses", | |
379 | .match = of_bus_pci_match, | |
380 | .count_cells = of_bus_pci_count_cells, | |
381 | .map = of_bus_pci_map, | |
382 | .translate = of_bus_pci_translate, | |
d2dd482b | 383 | .get_flags = of_bus_pci_get_flags, |
d1405b86 | 384 | }, |
83efafb3 | 385 | #endif /* CONFIG_PCI */ |
d1405b86 BH |
386 | /* ISA */ |
387 | { | |
388 | .name = "isa", | |
389 | .addresses = "reg", | |
390 | .match = of_bus_isa_match, | |
391 | .count_cells = of_bus_isa_count_cells, | |
392 | .map = of_bus_isa_map, | |
393 | .translate = of_bus_isa_translate, | |
d2dd482b | 394 | .get_flags = of_bus_isa_get_flags, |
d1405b86 BH |
395 | }, |
396 | /* Default */ | |
397 | { | |
398 | .name = "default", | |
399 | .addresses = "reg", | |
400 | .match = NULL, | |
d2dd482b BH |
401 | .count_cells = of_bus_default_count_cells, |
402 | .map = of_bus_default_map, | |
403 | .translate = of_bus_default_translate, | |
404 | .get_flags = of_bus_default_get_flags, | |
d1405b86 BH |
405 | }, |
406 | }; | |
407 | ||
408 | static struct of_bus *of_match_bus(struct device_node *np) | |
409 | { | |
410 | int i; | |
411 | ||
412 | for (i = 0; i < ARRAY_SIZE(of_busses); i ++) | |
413 | if (!of_busses[i].match || of_busses[i].match(np)) | |
414 | return &of_busses[i]; | |
415 | BUG(); | |
416 | return NULL; | |
417 | } | |
418 | ||
419 | static int of_translate_one(struct device_node *parent, struct of_bus *bus, | |
420 | struct of_bus *pbus, u32 *addr, | |
421 | int na, int ns, int pna) | |
422 | { | |
a7f67bdf | 423 | const u32 *ranges; |
d1405b86 BH |
424 | unsigned int rlen; |
425 | int rone; | |
426 | u64 offset = OF_BAD_ADDR; | |
427 | ||
428 | /* Normally, an absence of a "ranges" property means we are | |
429 | * crossing a non-translatable boundary, and thus the addresses | |
430 | * below the current not cannot be converted to CPU physical ones. | |
431 | * Unfortunately, while this is very clear in the spec, it's not | |
432 | * what Apple understood, and they do have things like /uni-n or | |
433 | * /ht nodes with no "ranges" property and a lot of perfectly | |
434 | * useable mapped devices below them. Thus we treat the absence of | |
435 | * "ranges" as equivalent to an empty "ranges" property which means | |
436 | * a 1:1 translation at that level. It's up to the caller not to try | |
437 | * to translate addresses that aren't supposed to be translated in | |
438 | * the first place. --BenH. | |
439 | */ | |
a7f67bdf | 440 | ranges = get_property(parent, "ranges", &rlen); |
d1405b86 | 441 | if (ranges == NULL || rlen == 0) { |
cc9fd71c | 442 | offset = of_read_number(addr, na); |
d2dd482b BH |
443 | memset(addr, 0, pna * 4); |
444 | DBG("OF: no ranges, 1:1 translation\n"); | |
d1405b86 BH |
445 | goto finish; |
446 | } | |
447 | ||
448 | DBG("OF: walking ranges...\n"); | |
449 | ||
450 | /* Now walk through the ranges */ | |
451 | rlen /= 4; | |
452 | rone = na + pna + ns; | |
453 | for (; rlen >= rone; rlen -= rone, ranges += rone) { | |
454 | offset = bus->map(addr, ranges, na, ns, pna); | |
455 | if (offset != OF_BAD_ADDR) | |
456 | break; | |
457 | } | |
458 | if (offset == OF_BAD_ADDR) { | |
459 | DBG("OF: not found !\n"); | |
460 | return 1; | |
461 | } | |
462 | memcpy(addr, ranges + na, 4 * pna); | |
463 | ||
464 | finish: | |
465 | of_dump_addr("OF: parent translation for:", addr, pna); | |
bb6b9b28 | 466 | DBG("OF: with offset: "PRu64"\n", offset); |
d1405b86 BH |
467 | |
468 | /* Translate it into parent bus space */ | |
469 | return pbus->translate(addr, offset, pna); | |
470 | } | |
471 | ||
472 | ||
473 | /* | |
474 | * Translate an address from the device-tree into a CPU physical address, | |
475 | * this walks up the tree and applies the various bus mappings on the | |
476 | * way. | |
477 | * | |
478 | * Note: We consider that crossing any level with #size-cells == 0 to mean | |
479 | * that translation is impossible (that is we are not dealing with a value | |
480 | * that can be mapped to a cpu physical address). This is not really specified | |
481 | * that way, but this is traditionally the way IBM at least do things | |
482 | */ | |
a7f67bdf | 483 | u64 of_translate_address(struct device_node *dev, const u32 *in_addr) |
d1405b86 BH |
484 | { |
485 | struct device_node *parent = NULL; | |
486 | struct of_bus *bus, *pbus; | |
487 | u32 addr[OF_MAX_ADDR_CELLS]; | |
488 | int na, ns, pna, pns; | |
489 | u64 result = OF_BAD_ADDR; | |
490 | ||
491 | DBG("OF: ** translation for device %s **\n", dev->full_name); | |
492 | ||
493 | /* Increase refcount at current level */ | |
494 | of_node_get(dev); | |
495 | ||
496 | /* Get parent & match bus type */ | |
497 | parent = of_get_parent(dev); | |
498 | if (parent == NULL) | |
499 | goto bail; | |
500 | bus = of_match_bus(parent); | |
501 | ||
502 | /* Cound address cells & copy address locally */ | |
503 | bus->count_cells(dev, &na, &ns); | |
504 | if (!OF_CHECK_COUNTS(na, ns)) { | |
505 | printk(KERN_ERR "prom_parse: Bad cell count for %s\n", | |
506 | dev->full_name); | |
507 | goto bail; | |
508 | } | |
509 | memcpy(addr, in_addr, na * 4); | |
510 | ||
511 | DBG("OF: bus is %s (na=%d, ns=%d) on %s\n", | |
512 | bus->name, na, ns, parent->full_name); | |
513 | of_dump_addr("OF: translating address:", addr, na); | |
514 | ||
515 | /* Translate */ | |
516 | for (;;) { | |
517 | /* Switch to parent bus */ | |
518 | of_node_put(dev); | |
519 | dev = parent; | |
520 | parent = of_get_parent(dev); | |
521 | ||
522 | /* If root, we have finished */ | |
523 | if (parent == NULL) { | |
524 | DBG("OF: reached root node\n"); | |
cc9fd71c | 525 | result = of_read_number(addr, na); |
d1405b86 BH |
526 | break; |
527 | } | |
528 | ||
529 | /* Get new parent bus and counts */ | |
530 | pbus = of_match_bus(parent); | |
531 | pbus->count_cells(dev, &pna, &pns); | |
532 | if (!OF_CHECK_COUNTS(pna, pns)) { | |
533 | printk(KERN_ERR "prom_parse: Bad cell count for %s\n", | |
534 | dev->full_name); | |
535 | break; | |
536 | } | |
537 | ||
538 | DBG("OF: parent bus is %s (na=%d, ns=%d) on %s\n", | |
539 | pbus->name, pna, pns, parent->full_name); | |
540 | ||
541 | /* Apply bus translation */ | |
542 | if (of_translate_one(dev, bus, pbus, addr, na, ns, pna)) | |
543 | break; | |
544 | ||
545 | /* Complete the move up one level */ | |
546 | na = pna; | |
547 | ns = pns; | |
548 | bus = pbus; | |
549 | ||
550 | of_dump_addr("OF: one level translation:", addr, na); | |
551 | } | |
552 | bail: | |
553 | of_node_put(parent); | |
554 | of_node_put(dev); | |
555 | ||
556 | return result; | |
557 | } | |
558 | EXPORT_SYMBOL(of_translate_address); | |
559 | ||
a7f67bdf | 560 | const u32 *of_get_address(struct device_node *dev, int index, u64 *size, |
d2dd482b | 561 | unsigned int *flags) |
d1405b86 | 562 | { |
a7f67bdf | 563 | const u32 *prop; |
d1405b86 BH |
564 | unsigned int psize; |
565 | struct device_node *parent; | |
566 | struct of_bus *bus; | |
567 | int onesize, i, na, ns; | |
568 | ||
569 | /* Get parent & match bus type */ | |
570 | parent = of_get_parent(dev); | |
571 | if (parent == NULL) | |
572 | return NULL; | |
573 | bus = of_match_bus(parent); | |
574 | bus->count_cells(dev, &na, &ns); | |
575 | of_node_put(parent); | |
576 | if (!OF_CHECK_COUNTS(na, ns)) | |
577 | return NULL; | |
578 | ||
579 | /* Get "reg" or "assigned-addresses" property */ | |
a7f67bdf | 580 | prop = get_property(dev, bus->addresses, &psize); |
d1405b86 BH |
581 | if (prop == NULL) |
582 | return NULL; | |
583 | psize /= 4; | |
584 | ||
585 | onesize = na + ns; | |
586 | for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) | |
587 | if (i == index) { | |
588 | if (size) | |
cc9fd71c | 589 | *size = of_read_number(prop + na, ns); |
d2dd482b BH |
590 | if (flags) |
591 | *flags = bus->get_flags(prop); | |
d1405b86 BH |
592 | return prop; |
593 | } | |
594 | return NULL; | |
595 | } | |
596 | EXPORT_SYMBOL(of_get_address); | |
597 | ||
a7f67bdf | 598 | static int __of_address_to_resource(struct device_node *dev, const u32 *addrp, |
d2dd482b BH |
599 | u64 size, unsigned int flags, |
600 | struct resource *r) | |
601 | { | |
602 | u64 taddr; | |
603 | ||
604 | if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0) | |
605 | return -EINVAL; | |
606 | taddr = of_translate_address(dev, addrp); | |
607 | if (taddr == OF_BAD_ADDR) | |
608 | return -EINVAL; | |
609 | memset(r, 0, sizeof(struct resource)); | |
610 | if (flags & IORESOURCE_IO) { | |
f2c4583a | 611 | unsigned long port; |
d2dd482b | 612 | port = pci_address_to_pio(taddr); |
f2c4583a | 613 | if (port == (unsigned long)-1) |
d2dd482b BH |
614 | return -EINVAL; |
615 | r->start = port; | |
616 | r->end = port + size - 1; | |
617 | } else { | |
618 | r->start = taddr; | |
619 | r->end = taddr + size - 1; | |
620 | } | |
621 | r->flags = flags; | |
622 | r->name = dev->name; | |
623 | return 0; | |
624 | } | |
625 | ||
626 | int of_address_to_resource(struct device_node *dev, int index, | |
627 | struct resource *r) | |
628 | { | |
a7f67bdf | 629 | const u32 *addrp; |
d2dd482b BH |
630 | u64 size; |
631 | unsigned int flags; | |
632 | ||
633 | addrp = of_get_address(dev, index, &size, &flags); | |
634 | if (addrp == NULL) | |
635 | return -EINVAL; | |
636 | return __of_address_to_resource(dev, addrp, size, flags, r); | |
637 | } | |
638 | EXPORT_SYMBOL_GPL(of_address_to_resource); | |
639 | ||
a7f67bdf | 640 | void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop, |
d4ad66fa JK |
641 | unsigned long *busno, unsigned long *phys, unsigned long *size) |
642 | { | |
a7f67bdf JK |
643 | const u32 *dma_window; |
644 | u32 cells; | |
645 | const unsigned char *prop; | |
d4ad66fa | 646 | |
a7f67bdf | 647 | dma_window = dma_window_prop; |
d4ad66fa JK |
648 | |
649 | /* busno is always one cell */ | |
650 | *busno = *(dma_window++); | |
651 | ||
652 | prop = get_property(dn, "ibm,#dma-address-cells", NULL); | |
03ac829b WS |
653 | if (!prop) |
654 | prop = get_property(dn, "#address-cells", NULL); | |
655 | ||
d4ad66fa | 656 | cells = prop ? *(u32 *)prop : prom_n_addr_cells(dn); |
cc9fd71c | 657 | *phys = of_read_number(dma_window, cells); |
d4ad66fa JK |
658 | |
659 | dma_window += cells; | |
660 | ||
661 | prop = get_property(dn, "ibm,#dma-size-cells", NULL); | |
662 | cells = prop ? *(u32 *)prop : prom_n_size_cells(dn); | |
cc9fd71c BH |
663 | *size = of_read_number(dma_window, cells); |
664 | } | |
665 | ||
666 | /* | |
667 | * Interrupt remapper | |
668 | */ | |
669 | ||
670 | static unsigned int of_irq_workarounds; | |
671 | static struct device_node *of_irq_dflt_pic; | |
672 | ||
673 | static struct device_node *of_irq_find_parent(struct device_node *child) | |
674 | { | |
675 | struct device_node *p; | |
a7f67bdf | 676 | const phandle *parp; |
cc9fd71c BH |
677 | |
678 | if (!of_node_get(child)) | |
679 | return NULL; | |
680 | ||
681 | do { | |
a7f67bdf | 682 | parp = get_property(child, "interrupt-parent", NULL); |
cc9fd71c BH |
683 | if (parp == NULL) |
684 | p = of_get_parent(child); | |
685 | else { | |
686 | if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) | |
687 | p = of_node_get(of_irq_dflt_pic); | |
688 | else | |
689 | p = of_find_node_by_phandle(*parp); | |
690 | } | |
691 | of_node_put(child); | |
692 | child = p; | |
693 | } while (p && get_property(p, "#interrupt-cells", NULL) == NULL); | |
694 | ||
695 | return p; | |
696 | } | |
697 | ||
cc9fd71c BH |
698 | /* This doesn't need to be called if you don't have any special workaround |
699 | * flags to pass | |
700 | */ | |
701 | void of_irq_map_init(unsigned int flags) | |
702 | { | |
703 | of_irq_workarounds = flags; | |
704 | ||
705 | /* OldWorld, don't bother looking at other things */ | |
706 | if (flags & OF_IMAP_OLDWORLD_MAC) | |
707 | return; | |
708 | ||
709 | /* If we don't have phandles, let's try to locate a default interrupt | |
710 | * controller (happens when booting with BootX). We do a first match | |
711 | * here, hopefully, that only ever happens on machines with one | |
712 | * controller. | |
713 | */ | |
714 | if (flags & OF_IMAP_NO_PHANDLE) { | |
715 | struct device_node *np; | |
716 | ||
717 | for(np = NULL; (np = of_find_all_nodes(np)) != NULL;) { | |
718 | if (get_property(np, "interrupt-controller", NULL) | |
719 | == NULL) | |
720 | continue; | |
721 | /* Skip /chosen/interrupt-controller */ | |
722 | if (strcmp(np->name, "chosen") == 0) | |
723 | continue; | |
724 | /* It seems like at least one person on this planet wants | |
725 | * to use BootX on a machine with an AppleKiwi controller | |
726 | * which happens to pretend to be an interrupt | |
727 | * controller too. | |
728 | */ | |
729 | if (strcmp(np->name, "AppleKiwi") == 0) | |
730 | continue; | |
731 | /* I think we found one ! */ | |
732 | of_irq_dflt_pic = np; | |
733 | break; | |
734 | } | |
735 | } | |
736 | ||
737 | } | |
738 | ||
aa43f779 | 739 | int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize, |
a7f67bdf | 740 | const u32 *addr, struct of_irq *out_irq) |
cc9fd71c BH |
741 | { |
742 | struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL; | |
a7f67bdf | 743 | const u32 *tmp, *imap, *imask; |
cc9fd71c BH |
744 | u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0; |
745 | int imaplen, match, i; | |
746 | ||
006b64de BH |
747 | DBG("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],ointsize=%d\n", |
748 | parent->full_name, intspec[0], intspec[1], ointsize); | |
749 | ||
cc9fd71c BH |
750 | ipar = of_node_get(parent); |
751 | ||
752 | /* First get the #interrupt-cells property of the current cursor | |
753 | * that tells us how to interpret the passed-in intspec. If there | |
754 | * is none, we are nice and just walk up the tree | |
755 | */ | |
756 | do { | |
a7f67bdf | 757 | tmp = get_property(ipar, "#interrupt-cells", NULL); |
cc9fd71c BH |
758 | if (tmp != NULL) { |
759 | intsize = *tmp; | |
760 | break; | |
761 | } | |
762 | tnode = ipar; | |
763 | ipar = of_irq_find_parent(ipar); | |
764 | of_node_put(tnode); | |
765 | } while (ipar); | |
766 | if (ipar == NULL) { | |
767 | DBG(" -> no parent found !\n"); | |
768 | goto fail; | |
769 | } | |
770 | ||
771 | DBG("of_irq_map_raw: ipar=%s, size=%d\n", ipar->full_name, intsize); | |
772 | ||
006b64de BH |
773 | if (ointsize != intsize) |
774 | return -EINVAL; | |
775 | ||
cc9fd71c BH |
776 | /* Look for this #address-cells. We have to implement the old linux |
777 | * trick of looking for the parent here as some device-trees rely on it | |
778 | */ | |
779 | old = of_node_get(ipar); | |
780 | do { | |
a7f67bdf | 781 | tmp = get_property(old, "#address-cells", NULL); |
cc9fd71c BH |
782 | tnode = of_get_parent(old); |
783 | of_node_put(old); | |
784 | old = tnode; | |
785 | } while(old && tmp == NULL); | |
786 | of_node_put(old); | |
787 | old = NULL; | |
788 | addrsize = (tmp == NULL) ? 2 : *tmp; | |
789 | ||
790 | DBG(" -> addrsize=%d\n", addrsize); | |
791 | ||
792 | /* Now start the actual "proper" walk of the interrupt tree */ | |
793 | while (ipar != NULL) { | |
794 | /* Now check if cursor is an interrupt-controller and if it is | |
795 | * then we are done | |
796 | */ | |
797 | if (get_property(ipar, "interrupt-controller", NULL) != NULL) { | |
798 | DBG(" -> got it !\n"); | |
799 | memcpy(out_irq->specifier, intspec, | |
800 | intsize * sizeof(u32)); | |
801 | out_irq->size = intsize; | |
802 | out_irq->controller = ipar; | |
803 | of_node_put(old); | |
804 | return 0; | |
805 | } | |
806 | ||
807 | /* Now look for an interrupt-map */ | |
a7f67bdf | 808 | imap = get_property(ipar, "interrupt-map", &imaplen); |
cc9fd71c BH |
809 | /* No interrupt map, check for an interrupt parent */ |
810 | if (imap == NULL) { | |
811 | DBG(" -> no map, getting parent\n"); | |
812 | newpar = of_irq_find_parent(ipar); | |
813 | goto skiplevel; | |
814 | } | |
815 | imaplen /= sizeof(u32); | |
816 | ||
817 | /* Look for a mask */ | |
a7f67bdf | 818 | imask = get_property(ipar, "interrupt-map-mask", NULL); |
cc9fd71c BH |
819 | |
820 | /* If we were passed no "reg" property and we attempt to parse | |
821 | * an interrupt-map, then #address-cells must be 0. | |
822 | * Fail if it's not. | |
823 | */ | |
824 | if (addr == NULL && addrsize != 0) { | |
825 | DBG(" -> no reg passed in when needed !\n"); | |
826 | goto fail; | |
827 | } | |
828 | ||
829 | /* Parse interrupt-map */ | |
830 | match = 0; | |
831 | while (imaplen > (addrsize + intsize + 1) && !match) { | |
832 | /* Compare specifiers */ | |
833 | match = 1; | |
834 | for (i = 0; i < addrsize && match; ++i) { | |
835 | u32 mask = imask ? imask[i] : 0xffffffffu; | |
836 | match = ((addr[i] ^ imap[i]) & mask) == 0; | |
837 | } | |
838 | for (; i < (addrsize + intsize) && match; ++i) { | |
839 | u32 mask = imask ? imask[i] : 0xffffffffu; | |
840 | match = | |
841 | ((intspec[i-addrsize] ^ imap[i]) & mask) == 0; | |
842 | } | |
843 | imap += addrsize + intsize; | |
844 | imaplen -= addrsize + intsize; | |
845 | ||
846 | DBG(" -> match=%d (imaplen=%d)\n", match, imaplen); | |
847 | ||
848 | /* Get the interrupt parent */ | |
849 | if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) | |
850 | newpar = of_node_get(of_irq_dflt_pic); | |
851 | else | |
852 | newpar = of_find_node_by_phandle((phandle)*imap); | |
853 | imap++; | |
854 | --imaplen; | |
855 | ||
856 | /* Check if not found */ | |
857 | if (newpar == NULL) { | |
858 | DBG(" -> imap parent not found !\n"); | |
859 | goto fail; | |
860 | } | |
861 | ||
862 | /* Get #interrupt-cells and #address-cells of new | |
863 | * parent | |
864 | */ | |
a7f67bdf | 865 | tmp = get_property(newpar, "#interrupt-cells", |
cc9fd71c BH |
866 | NULL); |
867 | if (tmp == NULL) { | |
868 | DBG(" -> parent lacks #interrupt-cells !\n"); | |
869 | goto fail; | |
870 | } | |
871 | newintsize = *tmp; | |
a7f67bdf | 872 | tmp = get_property(newpar, "#address-cells", |
cc9fd71c BH |
873 | NULL); |
874 | newaddrsize = (tmp == NULL) ? 0 : *tmp; | |
875 | ||
876 | DBG(" -> newintsize=%d, newaddrsize=%d\n", | |
877 | newintsize, newaddrsize); | |
878 | ||
879 | /* Check for malformed properties */ | |
880 | if (imaplen < (newaddrsize + newintsize)) | |
881 | goto fail; | |
882 | ||
883 | imap += newaddrsize + newintsize; | |
884 | imaplen -= newaddrsize + newintsize; | |
885 | ||
886 | DBG(" -> imaplen=%d\n", imaplen); | |
887 | } | |
888 | if (!match) | |
889 | goto fail; | |
890 | ||
891 | of_node_put(old); | |
892 | old = of_node_get(newpar); | |
893 | addrsize = newaddrsize; | |
894 | intsize = newintsize; | |
895 | intspec = imap - intsize; | |
896 | addr = intspec - addrsize; | |
897 | ||
898 | skiplevel: | |
899 | /* Iterate again with new parent */ | |
900 | DBG(" -> new parent: %s\n", newpar ? newpar->full_name : "<>"); | |
901 | of_node_put(ipar); | |
902 | ipar = newpar; | |
903 | newpar = NULL; | |
904 | } | |
905 | fail: | |
906 | of_node_put(ipar); | |
907 | of_node_put(old); | |
908 | of_node_put(newpar); | |
909 | ||
910 | return -EINVAL; | |
911 | } | |
912 | EXPORT_SYMBOL_GPL(of_irq_map_raw); | |
913 | ||
914 | #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) | |
915 | static int of_irq_map_oldworld(struct device_node *device, int index, | |
916 | struct of_irq *out_irq) | |
917 | { | |
a7f67bdf | 918 | const u32 *ints; |
cc9fd71c BH |
919 | int intlen; |
920 | ||
921 | /* | |
922 | * Old machines just have a list of interrupt numbers | |
6f67f9d2 BH |
923 | * and no interrupt-controller nodes. We also have dodgy |
924 | * cases where the APPL,interrupts property is completely | |
925 | * missing behind pci-pci bridges and we have to get it | |
926 | * from the parent (the bridge itself, as apple just wired | |
927 | * everything together on these) | |
cc9fd71c | 928 | */ |
6f67f9d2 BH |
929 | while (device) { |
930 | ints = get_property(device, "AAPL,interrupts", &intlen); | |
931 | if (ints != NULL) | |
932 | break; | |
933 | device = device->parent; | |
934 | if (device && strcmp(device->type, "pci") != 0) | |
935 | break; | |
936 | } | |
cc9fd71c BH |
937 | if (ints == NULL) |
938 | return -EINVAL; | |
939 | intlen /= sizeof(u32); | |
940 | ||
941 | if (index >= intlen) | |
942 | return -EINVAL; | |
943 | ||
944 | out_irq->controller = NULL; | |
945 | out_irq->specifier[0] = ints[index]; | |
946 | out_irq->size = 1; | |
947 | ||
948 | return 0; | |
949 | } | |
950 | #else /* defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) */ | |
951 | static int of_irq_map_oldworld(struct device_node *device, int index, | |
952 | struct of_irq *out_irq) | |
953 | { | |
954 | return -EINVAL; | |
955 | } | |
956 | #endif /* !(defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)) */ | |
957 | ||
958 | int of_irq_map_one(struct device_node *device, int index, struct of_irq *out_irq) | |
959 | { | |
960 | struct device_node *p; | |
a7f67bdf JK |
961 | const u32 *intspec, *tmp, *addr; |
962 | u32 intsize, intlen; | |
cc9fd71c BH |
963 | int res; |
964 | ||
965 | DBG("of_irq_map_one: dev=%s, index=%d\n", device->full_name, index); | |
966 | ||
967 | /* OldWorld mac stuff is "special", handle out of line */ | |
968 | if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) | |
969 | return of_irq_map_oldworld(device, index, out_irq); | |
970 | ||
971 | /* Get the interrupts property */ | |
a7f67bdf | 972 | intspec = get_property(device, "interrupts", &intlen); |
cc9fd71c BH |
973 | if (intspec == NULL) |
974 | return -EINVAL; | |
975 | intlen /= sizeof(u32); | |
976 | ||
977 | /* Get the reg property (if any) */ | |
a7f67bdf | 978 | addr = get_property(device, "reg", NULL); |
cc9fd71c BH |
979 | |
980 | /* Look for the interrupt parent. */ | |
981 | p = of_irq_find_parent(device); | |
982 | if (p == NULL) | |
983 | return -EINVAL; | |
984 | ||
985 | /* Get size of interrupt specifier */ | |
a7f67bdf | 986 | tmp = get_property(p, "#interrupt-cells", NULL); |
cc9fd71c BH |
987 | if (tmp == NULL) { |
988 | of_node_put(p); | |
989 | return -EINVAL; | |
990 | } | |
991 | intsize = *tmp; | |
992 | ||
006b64de BH |
993 | DBG(" intsize=%d intlen=%d\n", intsize, intlen); |
994 | ||
cc9fd71c | 995 | /* Check index */ |
58d383a6 | 996 | if ((index + 1) * intsize > intlen) |
cc9fd71c BH |
997 | return -EINVAL; |
998 | ||
999 | /* Get new specifier and map it */ | |
006b64de BH |
1000 | res = of_irq_map_raw(p, intspec + index * intsize, intsize, |
1001 | addr, out_irq); | |
cc9fd71c BH |
1002 | of_node_put(p); |
1003 | return res; | |
1004 | } | |
1005 | EXPORT_SYMBOL_GPL(of_irq_map_one); |