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