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1#include <linux/string.h>
2#include <linux/kernel.h>
3#include <linux/of.h>
4#include <linux/init.h>
5#include <linux/export.h>
6#include <linux/mod_devicetable.h>
7#include <linux/slab.h>
8#include <linux/errno.h>
9#include <linux/irq.h>
10#include <linux/of_device.h>
11#include <linux/of_platform.h>
12#include <asm/spitfire.h>
13
14#include "of_device_common.h"
15
16void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name)
17{
18 unsigned long ret = res->start + offset;
19 struct resource *r;
20
21 if (res->flags & IORESOURCE_MEM)
22 r = request_mem_region(ret, size, name);
23 else
24 r = request_region(ret, size, name);
25 if (!r)
26 ret = 0;
27
28 return (void __iomem *) ret;
29}
30EXPORT_SYMBOL(of_ioremap);
31
32void of_iounmap(struct resource *res, void __iomem *base, unsigned long size)
33{
34 if (res->flags & IORESOURCE_MEM)
35 release_mem_region((unsigned long) base, size);
36 else
37 release_region((unsigned long) base, size);
38}
39EXPORT_SYMBOL(of_iounmap);
40
41/*
42 * PCI bus specific translator
43 */
44
45static int of_bus_pci_match(struct device_node *np)
46{
47 if (!strcmp(np->name, "pci")) {
48 const char *model = of_get_property(np, "model", NULL);
49
50 if (model && !strcmp(model, "SUNW,simba"))
51 return 0;
52
53 /* Do not do PCI specific frobbing if the
54 * PCI bridge lacks a ranges property. We
55 * want to pass it through up to the next
56 * parent as-is, not with the PCI translate
57 * method which chops off the top address cell.
58 */
59 if (!of_find_property(np, "ranges", NULL))
60 return 0;
61
62 return 1;
63 }
64
65 return 0;
66}
67
68static int of_bus_simba_match(struct device_node *np)
69{
70 const char *model = of_get_property(np, "model", NULL);
71
72 if (model && !strcmp(model, "SUNW,simba"))
73 return 1;
74
75 /* Treat PCI busses lacking ranges property just like
76 * simba.
77 */
78 if (!strcmp(np->name, "pci")) {
79 if (!of_find_property(np, "ranges", NULL))
80 return 1;
81 }
82
83 return 0;
84}
85
86static int of_bus_simba_map(u32 *addr, const u32 *range,
87 int na, int ns, int pna)
88{
89 return 0;
90}
91
92static void of_bus_pci_count_cells(struct device_node *np,
93 int *addrc, int *sizec)
94{
95 if (addrc)
96 *addrc = 3;
97 if (sizec)
98 *sizec = 2;
99}
100
101static int of_bus_pci_map(u32 *addr, const u32 *range,
102 int na, int ns, int pna)
103{
104 u32 result[OF_MAX_ADDR_CELLS];
105 int i;
106
107 /* Check address type match */
108 if (!((addr[0] ^ range[0]) & 0x03000000))
109 goto type_match;
110
111 /* Special exception, we can map a 64-bit address into
112 * a 32-bit range.
113 */
114 if ((addr[0] & 0x03000000) == 0x03000000 &&
115 (range[0] & 0x03000000) == 0x02000000)
116 goto type_match;
117
118 return -EINVAL;
119
120type_match:
121 if (of_out_of_range(addr + 1, range + 1, range + na + pna,
122 na - 1, ns))
123 return -EINVAL;
124
125 /* Start with the parent range base. */
126 memcpy(result, range + na, pna * 4);
127
128 /* Add in the child address offset, skipping high cell. */
129 for (i = 0; i < na - 1; i++)
130 result[pna - 1 - i] +=
131 (addr[na - 1 - i] -
132 range[na - 1 - i]);
133
134 memcpy(addr, result, pna * 4);
135
136 return 0;
137}
138
139static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags)
140{
141 u32 w = addr[0];
142
143 /* For PCI, we override whatever child busses may have used. */
144 flags = 0;
145 switch((w >> 24) & 0x03) {
146 case 0x01:
147 flags |= IORESOURCE_IO;
148 break;
149
150 case 0x02: /* 32 bits */
151 case 0x03: /* 64 bits */
152 flags |= IORESOURCE_MEM;
153 break;
154 }
155 if (w & 0x40000000)
156 flags |= IORESOURCE_PREFETCH;
157 return flags;
158}
159
160/*
161 * FHC/Central bus specific translator.
162 *
163 * This is just needed to hard-code the address and size cell
164 * counts. 'fhc' and 'central' nodes lack the #address-cells and
165 * #size-cells properties, and if you walk to the root on such
166 * Enterprise boxes all you'll get is a #size-cells of 2 which is
167 * not what we want to use.
168 */
169static int of_bus_fhc_match(struct device_node *np)
170{
171 return !strcmp(np->name, "fhc") ||
172 !strcmp(np->name, "central");
173}
174
175#define of_bus_fhc_count_cells of_bus_sbus_count_cells
176
177/*
178 * Array of bus specific translators
179 */
180
181static struct of_bus of_busses[] = {
182 /* PCI */
183 {
184 .name = "pci",
185 .addr_prop_name = "assigned-addresses",
186 .match = of_bus_pci_match,
187 .count_cells = of_bus_pci_count_cells,
188 .map = of_bus_pci_map,
189 .get_flags = of_bus_pci_get_flags,
190 },
191 /* SIMBA */
192 {
193 .name = "simba",
194 .addr_prop_name = "assigned-addresses",
195 .match = of_bus_simba_match,
196 .count_cells = of_bus_pci_count_cells,
197 .map = of_bus_simba_map,
198 .get_flags = of_bus_pci_get_flags,
199 },
200 /* SBUS */
201 {
202 .name = "sbus",
203 .addr_prop_name = "reg",
204 .match = of_bus_sbus_match,
205 .count_cells = of_bus_sbus_count_cells,
206 .map = of_bus_default_map,
207 .get_flags = of_bus_default_get_flags,
208 },
209 /* FHC */
210 {
211 .name = "fhc",
212 .addr_prop_name = "reg",
213 .match = of_bus_fhc_match,
214 .count_cells = of_bus_fhc_count_cells,
215 .map = of_bus_default_map,
216 .get_flags = of_bus_default_get_flags,
217 },
218 /* Default */
219 {
220 .name = "default",
221 .addr_prop_name = "reg",
222 .match = NULL,
223 .count_cells = of_bus_default_count_cells,
224 .map = of_bus_default_map,
225 .get_flags = of_bus_default_get_flags,
226 },
227};
228
229static struct of_bus *of_match_bus(struct device_node *np)
230{
231 int i;
232
233 for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
234 if (!of_busses[i].match || of_busses[i].match(np))
235 return &of_busses[i];
236 BUG();
237 return NULL;
238}
239
240static int __init build_one_resource(struct device_node *parent,
241 struct of_bus *bus,
242 struct of_bus *pbus,
243 u32 *addr,
244 int na, int ns, int pna)
245{
246 const u32 *ranges;
247 int rone, rlen;
248
249 ranges = of_get_property(parent, "ranges", &rlen);
250 if (ranges == NULL || rlen == 0) {
251 u32 result[OF_MAX_ADDR_CELLS];
252 int i;
253
254 memset(result, 0, pna * 4);
255 for (i = 0; i < na; i++)
256 result[pna - 1 - i] =
257 addr[na - 1 - i];
258
259 memcpy(addr, result, pna * 4);
260 return 0;
261 }
262
263 /* Now walk through the ranges */
264 rlen /= 4;
265 rone = na + pna + ns;
266 for (; rlen >= rone; rlen -= rone, ranges += rone) {
267 if (!bus->map(addr, ranges, na, ns, pna))
268 return 0;
269 }
270
271 /* When we miss an I/O space match on PCI, just pass it up
272 * to the next PCI bridge and/or controller.
273 */
274 if (!strcmp(bus->name, "pci") &&
275 (addr[0] & 0x03000000) == 0x01000000)
276 return 0;
277
278 return 1;
279}
280
281static int __init use_1to1_mapping(struct device_node *pp)
282{
283 /* If we have a ranges property in the parent, use it. */
284 if (of_find_property(pp, "ranges", NULL) != NULL)
285 return 0;
286
287 /* If the parent is the dma node of an ISA bus, pass
288 * the translation up to the root.
289 *
290 * Some SBUS devices use intermediate nodes to express
291 * hierarchy within the device itself. These aren't
292 * real bus nodes, and don't have a 'ranges' property.
293 * But, we should still pass the translation work up
294 * to the SBUS itself.
295 */
296 if (!strcmp(pp->name, "dma") ||
297 !strcmp(pp->name, "espdma") ||
298 !strcmp(pp->name, "ledma") ||
299 !strcmp(pp->name, "lebuffer"))
300 return 0;
301
302 /* Similarly for all PCI bridges, if we get this far
303 * it lacks a ranges property, and this will include
304 * cases like Simba.
305 */
306 if (!strcmp(pp->name, "pci"))
307 return 0;
308
309 return 1;
310}
311
312static int of_resource_verbose;
313
314static void __init build_device_resources(struct platform_device *op,
315 struct device *parent)
316{
317 struct platform_device *p_op;
318 struct of_bus *bus;
319 int na, ns;
320 int index, num_reg;
321 const void *preg;
322
323 if (!parent)
324 return;
325
326 p_op = to_platform_device(parent);
327 bus = of_match_bus(p_op->dev.of_node);
328 bus->count_cells(op->dev.of_node, &na, &ns);
329
330 preg = of_get_property(op->dev.of_node, bus->addr_prop_name, &num_reg);
331 if (!preg || num_reg == 0)
332 return;
333
334 /* Convert to num-cells. */
335 num_reg /= 4;
336
337 /* Convert to num-entries. */
338 num_reg /= na + ns;
339
340 /* Prevent overrunning the op->resources[] array. */
341 if (num_reg > PROMREG_MAX) {
342 printk(KERN_WARNING "%s: Too many regs (%d), "
343 "limiting to %d.\n",
344 op->dev.of_node->full_name, num_reg, PROMREG_MAX);
345 num_reg = PROMREG_MAX;
346 }
347
348 op->resource = op->archdata.resource;
349 op->num_resources = num_reg;
350 for (index = 0; index < num_reg; index++) {
351 struct resource *r = &op->resource[index];
352 u32 addr[OF_MAX_ADDR_CELLS];
353 const u32 *reg = (preg + (index * ((na + ns) * 4)));
354 struct device_node *dp = op->dev.of_node;
355 struct device_node *pp = p_op->dev.of_node;
356 struct of_bus *pbus, *dbus;
357 u64 size, result = OF_BAD_ADDR;
358 unsigned long flags;
359 int dna, dns;
360 int pna, pns;
361
362 size = of_read_addr(reg + na, ns);
363 memcpy(addr, reg, na * 4);
364
365 flags = bus->get_flags(addr, 0);
366
367 if (use_1to1_mapping(pp)) {
368 result = of_read_addr(addr, na);
369 goto build_res;
370 }
371
372 dna = na;
373 dns = ns;
374 dbus = bus;
375
376 while (1) {
377 dp = pp;
378 pp = dp->parent;
379 if (!pp) {
380 result = of_read_addr(addr, dna);
381 break;
382 }
383
384 pbus = of_match_bus(pp);
385 pbus->count_cells(dp, &pna, &pns);
386
387 if (build_one_resource(dp, dbus, pbus, addr,
388 dna, dns, pna))
389 break;
390
391 flags = pbus->get_flags(addr, flags);
392
393 dna = pna;
394 dns = pns;
395 dbus = pbus;
396 }
397
398 build_res:
399 memset(r, 0, sizeof(*r));
400
401 if (of_resource_verbose)
402 printk("%s reg[%d] -> %llx\n",
403 op->dev.of_node->full_name, index,
404 result);
405
406 if (result != OF_BAD_ADDR) {
407 if (tlb_type == hypervisor)
408 result &= 0x0fffffffffffffffUL;
409
410 r->start = result;
411 r->end = result + size - 1;
412 r->flags = flags;
413 }
414 r->name = op->dev.of_node->name;
415 }
416}
417
418static struct device_node * __init
419apply_interrupt_map(struct device_node *dp, struct device_node *pp,
420 const u32 *imap, int imlen, const u32 *imask,
421 unsigned int *irq_p)
422{
423 struct device_node *cp;
424 unsigned int irq = *irq_p;
425 struct of_bus *bus;
426 phandle handle;
427 const u32 *reg;
428 int na, num_reg, i;
429
430 bus = of_match_bus(pp);
431 bus->count_cells(dp, &na, NULL);
432
433 reg = of_get_property(dp, "reg", &num_reg);
434 if (!reg || !num_reg)
435 return NULL;
436
437 imlen /= ((na + 3) * 4);
438 handle = 0;
439 for (i = 0; i < imlen; i++) {
440 int j;
441
442 for (j = 0; j < na; j++) {
443 if ((reg[j] & imask[j]) != imap[j])
444 goto next;
445 }
446 if (imap[na] == irq) {
447 handle = imap[na + 1];
448 irq = imap[na + 2];
449 break;
450 }
451
452 next:
453 imap += (na + 3);
454 }
455 if (i == imlen) {
456 /* Psycho and Sabre PCI controllers can have 'interrupt-map'
457 * properties that do not include the on-board device
458 * interrupts. Instead, the device's 'interrupts' property
459 * is already a fully specified INO value.
460 *
461 * Handle this by deciding that, if we didn't get a
462 * match in the parent's 'interrupt-map', and the
463 * parent is an IRQ translator, then use the parent as
464 * our IRQ controller.
465 */
466 if (pp->irq_trans)
467 return pp;
468
469 return NULL;
470 }
471
472 *irq_p = irq;
473 cp = of_find_node_by_phandle(handle);
474
475 return cp;
476}
477
478static unsigned int __init pci_irq_swizzle(struct device_node *dp,
479 struct device_node *pp,
480 unsigned int irq)
481{
482 const struct linux_prom_pci_registers *regs;
483 unsigned int bus, devfn, slot, ret;
484
485 if (irq < 1 || irq > 4)
486 return irq;
487
488 regs = of_get_property(dp, "reg", NULL);
489 if (!regs)
490 return irq;
491
492 bus = (regs->phys_hi >> 16) & 0xff;
493 devfn = (regs->phys_hi >> 8) & 0xff;
494 slot = (devfn >> 3) & 0x1f;
495
496 if (pp->irq_trans) {
497 /* Derived from Table 8-3, U2P User's Manual. This branch
498 * is handling a PCI controller that lacks a proper set of
499 * interrupt-map and interrupt-map-mask properties. The
500 * Ultra-E450 is one example.
501 *
502 * The bit layout is BSSLL, where:
503 * B: 0 on bus A, 1 on bus B
504 * D: 2-bit slot number, derived from PCI device number as
505 * (dev - 1) for bus A, or (dev - 2) for bus B
506 * L: 2-bit line number
507 */
508 if (bus & 0x80) {
509 /* PBM-A */
510 bus = 0x00;
511 slot = (slot - 1) << 2;
512 } else {
513 /* PBM-B */
514 bus = 0x10;
515 slot = (slot - 2) << 2;
516 }
517 irq -= 1;
518
519 ret = (bus | slot | irq);
520 } else {
521 /* Going through a PCI-PCI bridge that lacks a set of
522 * interrupt-map and interrupt-map-mask properties.
523 */
524 ret = ((irq - 1 + (slot & 3)) & 3) + 1;
525 }
526
527 return ret;
528}
529
530static int of_irq_verbose;
531
532static unsigned int __init build_one_device_irq(struct platform_device *op,
533 struct device *parent,
534 unsigned int irq)
535{
536 struct device_node *dp = op->dev.of_node;
537 struct device_node *pp, *ip;
538 unsigned int orig_irq = irq;
539 int nid;
540
541 if (irq == 0xffffffff)
542 return irq;
543
544 if (dp->irq_trans) {
545 irq = dp->irq_trans->irq_build(dp, irq,
546 dp->irq_trans->data);
547
548 if (of_irq_verbose)
549 printk("%s: direct translate %x --> %x\n",
550 dp->full_name, orig_irq, irq);
551
552 goto out;
553 }
554
555 /* Something more complicated. Walk up to the root, applying
556 * interrupt-map or bus specific translations, until we hit
557 * an IRQ translator.
558 *
559 * If we hit a bus type or situation we cannot handle, we
560 * stop and assume that the original IRQ number was in a
561 * format which has special meaning to it's immediate parent.
562 */
563 pp = dp->parent;
564 ip = NULL;
565 while (pp) {
566 const void *imap, *imsk;
567 int imlen;
568
569 imap = of_get_property(pp, "interrupt-map", &imlen);
570 imsk = of_get_property(pp, "interrupt-map-mask", NULL);
571 if (imap && imsk) {
572 struct device_node *iret;
573 int this_orig_irq = irq;
574
575 iret = apply_interrupt_map(dp, pp,
576 imap, imlen, imsk,
577 &irq);
578
579 if (of_irq_verbose)
580 printk("%s: Apply [%s:%x] imap --> [%s:%x]\n",
581 op->dev.of_node->full_name,
582 pp->full_name, this_orig_irq,
583 (iret ? iret->full_name : "NULL"), irq);
584
585 if (!iret)
586 break;
587
588 if (iret->irq_trans) {
589 ip = iret;
590 break;
591 }
592 } else {
593 if (!strcmp(pp->name, "pci")) {
594 unsigned int this_orig_irq = irq;
595
596 irq = pci_irq_swizzle(dp, pp, irq);
597 if (of_irq_verbose)
598 printk("%s: PCI swizzle [%s] "
599 "%x --> %x\n",
600 op->dev.of_node->full_name,
601 pp->full_name, this_orig_irq,
602 irq);
603
604 }
605
606 if (pp->irq_trans) {
607 ip = pp;
608 break;
609 }
610 }
611 dp = pp;
612 pp = pp->parent;
613 }
614 if (!ip)
615 return orig_irq;
616
617 irq = ip->irq_trans->irq_build(op->dev.of_node, irq,
618 ip->irq_trans->data);
619 if (of_irq_verbose)
620 printk("%s: Apply IRQ trans [%s] %x --> %x\n",
621 op->dev.of_node->full_name, ip->full_name, orig_irq, irq);
622
623out:
624 nid = of_node_to_nid(dp);
625 if (nid != -1) {
626 cpumask_t numa_mask;
627
628 cpumask_copy(&numa_mask, cpumask_of_node(nid));
629 irq_set_affinity(irq, &numa_mask);
630 }
631
632 return irq;
633}
634
635static struct platform_device * __init scan_one_device(struct device_node *dp,
636 struct device *parent)
637{
638 struct platform_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
639 const unsigned int *irq;
640 struct dev_archdata *sd;
641 int len, i;
642
643 if (!op)
644 return NULL;
645
646 sd = &op->dev.archdata;
647 sd->op = op;
648
649 op->dev.of_node = dp;
650
651 irq = of_get_property(dp, "interrupts", &len);
652 if (irq) {
653 op->archdata.num_irqs = len / 4;
654
655 /* Prevent overrunning the op->irqs[] array. */
656 if (op->archdata.num_irqs > PROMINTR_MAX) {
657 printk(KERN_WARNING "%s: Too many irqs (%d), "
658 "limiting to %d.\n",
659 dp->full_name, op->archdata.num_irqs, PROMINTR_MAX);
660 op->archdata.num_irqs = PROMINTR_MAX;
661 }
662 memcpy(op->archdata.irqs, irq, op->archdata.num_irqs * 4);
663 } else {
664 op->archdata.num_irqs = 0;
665 }
666
667 build_device_resources(op, parent);
668 for (i = 0; i < op->archdata.num_irqs; i++)
669 op->archdata.irqs[i] = build_one_device_irq(op, parent, op->archdata.irqs[i]);
670
671 op->dev.parent = parent;
672 op->dev.bus = &platform_bus_type;
673 if (!parent)
674 dev_set_name(&op->dev, "root");
675 else
676 dev_set_name(&op->dev, "%08x", dp->phandle);
677
678 if (of_device_register(op)) {
679 printk("%s: Could not register of device.\n",
680 dp->full_name);
681 kfree(op);
682 op = NULL;
683 }
684
685 return op;
686}
687
688static void __init scan_tree(struct device_node *dp, struct device *parent)
689{
690 while (dp) {
691 struct platform_device *op = scan_one_device(dp, parent);
692
693 if (op)
694 scan_tree(dp->child, &op->dev);
695
696 dp = dp->sibling;
697 }
698}
699
700static int __init scan_of_devices(void)
701{
702 struct device_node *root = of_find_node_by_path("/");
703 struct platform_device *parent;
704
705 parent = scan_one_device(root, NULL);
706 if (!parent)
707 return 0;
708
709 scan_tree(root->child, &parent->dev);
710 return 0;
711}
712postcore_initcall(scan_of_devices);
713
714static int __init of_debug(char *str)
715{
716 int val = 0;
717
718 get_option(&str, &val);
719 if (val & 1)
720 of_resource_verbose = 1;
721 if (val & 2)
722 of_irq_verbose = 1;
723 return 1;
724}
725
726__setup("of_debug=", of_debug);
1#include <linux/string.h>
2#include <linux/kernel.h>
3#include <linux/of.h>
4#include <linux/init.h>
5#include <linux/module.h>
6#include <linux/mod_devicetable.h>
7#include <linux/slab.h>
8#include <linux/errno.h>
9#include <linux/irq.h>
10#include <linux/of_device.h>
11#include <linux/of_platform.h>
12
13#include "of_device_common.h"
14
15void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name)
16{
17 unsigned long ret = res->start + offset;
18 struct resource *r;
19
20 if (res->flags & IORESOURCE_MEM)
21 r = request_mem_region(ret, size, name);
22 else
23 r = request_region(ret, size, name);
24 if (!r)
25 ret = 0;
26
27 return (void __iomem *) ret;
28}
29EXPORT_SYMBOL(of_ioremap);
30
31void of_iounmap(struct resource *res, void __iomem *base, unsigned long size)
32{
33 if (res->flags & IORESOURCE_MEM)
34 release_mem_region((unsigned long) base, size);
35 else
36 release_region((unsigned long) base, size);
37}
38EXPORT_SYMBOL(of_iounmap);
39
40/*
41 * PCI bus specific translator
42 */
43
44static int of_bus_pci_match(struct device_node *np)
45{
46 if (!strcmp(np->name, "pci")) {
47 const char *model = of_get_property(np, "model", NULL);
48
49 if (model && !strcmp(model, "SUNW,simba"))
50 return 0;
51
52 /* Do not do PCI specific frobbing if the
53 * PCI bridge lacks a ranges property. We
54 * want to pass it through up to the next
55 * parent as-is, not with the PCI translate
56 * method which chops off the top address cell.
57 */
58 if (!of_find_property(np, "ranges", NULL))
59 return 0;
60
61 return 1;
62 }
63
64 return 0;
65}
66
67static int of_bus_simba_match(struct device_node *np)
68{
69 const char *model = of_get_property(np, "model", NULL);
70
71 if (model && !strcmp(model, "SUNW,simba"))
72 return 1;
73
74 /* Treat PCI busses lacking ranges property just like
75 * simba.
76 */
77 if (!strcmp(np->name, "pci")) {
78 if (!of_find_property(np, "ranges", NULL))
79 return 1;
80 }
81
82 return 0;
83}
84
85static int of_bus_simba_map(u32 *addr, const u32 *range,
86 int na, int ns, int pna)
87{
88 return 0;
89}
90
91static void of_bus_pci_count_cells(struct device_node *np,
92 int *addrc, int *sizec)
93{
94 if (addrc)
95 *addrc = 3;
96 if (sizec)
97 *sizec = 2;
98}
99
100static int of_bus_pci_map(u32 *addr, const u32 *range,
101 int na, int ns, int pna)
102{
103 u32 result[OF_MAX_ADDR_CELLS];
104 int i;
105
106 /* Check address type match */
107 if (!((addr[0] ^ range[0]) & 0x03000000))
108 goto type_match;
109
110 /* Special exception, we can map a 64-bit address into
111 * a 32-bit range.
112 */
113 if ((addr[0] & 0x03000000) == 0x03000000 &&
114 (range[0] & 0x03000000) == 0x02000000)
115 goto type_match;
116
117 return -EINVAL;
118
119type_match:
120 if (of_out_of_range(addr + 1, range + 1, range + na + pna,
121 na - 1, ns))
122 return -EINVAL;
123
124 /* Start with the parent range base. */
125 memcpy(result, range + na, pna * 4);
126
127 /* Add in the child address offset, skipping high cell. */
128 for (i = 0; i < na - 1; i++)
129 result[pna - 1 - i] +=
130 (addr[na - 1 - i] -
131 range[na - 1 - i]);
132
133 memcpy(addr, result, pna * 4);
134
135 return 0;
136}
137
138static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags)
139{
140 u32 w = addr[0];
141
142 /* For PCI, we override whatever child busses may have used. */
143 flags = 0;
144 switch((w >> 24) & 0x03) {
145 case 0x01:
146 flags |= IORESOURCE_IO;
147 break;
148
149 case 0x02: /* 32 bits */
150 case 0x03: /* 64 bits */
151 flags |= IORESOURCE_MEM;
152 break;
153 }
154 if (w & 0x40000000)
155 flags |= IORESOURCE_PREFETCH;
156 return flags;
157}
158
159/*
160 * FHC/Central bus specific translator.
161 *
162 * This is just needed to hard-code the address and size cell
163 * counts. 'fhc' and 'central' nodes lack the #address-cells and
164 * #size-cells properties, and if you walk to the root on such
165 * Enterprise boxes all you'll get is a #size-cells of 2 which is
166 * not what we want to use.
167 */
168static int of_bus_fhc_match(struct device_node *np)
169{
170 return !strcmp(np->name, "fhc") ||
171 !strcmp(np->name, "central");
172}
173
174#define of_bus_fhc_count_cells of_bus_sbus_count_cells
175
176/*
177 * Array of bus specific translators
178 */
179
180static struct of_bus of_busses[] = {
181 /* PCI */
182 {
183 .name = "pci",
184 .addr_prop_name = "assigned-addresses",
185 .match = of_bus_pci_match,
186 .count_cells = of_bus_pci_count_cells,
187 .map = of_bus_pci_map,
188 .get_flags = of_bus_pci_get_flags,
189 },
190 /* SIMBA */
191 {
192 .name = "simba",
193 .addr_prop_name = "assigned-addresses",
194 .match = of_bus_simba_match,
195 .count_cells = of_bus_pci_count_cells,
196 .map = of_bus_simba_map,
197 .get_flags = of_bus_pci_get_flags,
198 },
199 /* SBUS */
200 {
201 .name = "sbus",
202 .addr_prop_name = "reg",
203 .match = of_bus_sbus_match,
204 .count_cells = of_bus_sbus_count_cells,
205 .map = of_bus_default_map,
206 .get_flags = of_bus_default_get_flags,
207 },
208 /* FHC */
209 {
210 .name = "fhc",
211 .addr_prop_name = "reg",
212 .match = of_bus_fhc_match,
213 .count_cells = of_bus_fhc_count_cells,
214 .map = of_bus_default_map,
215 .get_flags = of_bus_default_get_flags,
216 },
217 /* Default */
218 {
219 .name = "default",
220 .addr_prop_name = "reg",
221 .match = NULL,
222 .count_cells = of_bus_default_count_cells,
223 .map = of_bus_default_map,
224 .get_flags = of_bus_default_get_flags,
225 },
226};
227
228static struct of_bus *of_match_bus(struct device_node *np)
229{
230 int i;
231
232 for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
233 if (!of_busses[i].match || of_busses[i].match(np))
234 return &of_busses[i];
235 BUG();
236 return NULL;
237}
238
239static int __init build_one_resource(struct device_node *parent,
240 struct of_bus *bus,
241 struct of_bus *pbus,
242 u32 *addr,
243 int na, int ns, int pna)
244{
245 const u32 *ranges;
246 int rone, rlen;
247
248 ranges = of_get_property(parent, "ranges", &rlen);
249 if (ranges == NULL || rlen == 0) {
250 u32 result[OF_MAX_ADDR_CELLS];
251 int i;
252
253 memset(result, 0, pna * 4);
254 for (i = 0; i < na; i++)
255 result[pna - 1 - i] =
256 addr[na - 1 - i];
257
258 memcpy(addr, result, pna * 4);
259 return 0;
260 }
261
262 /* Now walk through the ranges */
263 rlen /= 4;
264 rone = na + pna + ns;
265 for (; rlen >= rone; rlen -= rone, ranges += rone) {
266 if (!bus->map(addr, ranges, na, ns, pna))
267 return 0;
268 }
269
270 /* When we miss an I/O space match on PCI, just pass it up
271 * to the next PCI bridge and/or controller.
272 */
273 if (!strcmp(bus->name, "pci") &&
274 (addr[0] & 0x03000000) == 0x01000000)
275 return 0;
276
277 return 1;
278}
279
280static int __init use_1to1_mapping(struct device_node *pp)
281{
282 /* If we have a ranges property in the parent, use it. */
283 if (of_find_property(pp, "ranges", NULL) != NULL)
284 return 0;
285
286 /* If the parent is the dma node of an ISA bus, pass
287 * the translation up to the root.
288 *
289 * Some SBUS devices use intermediate nodes to express
290 * hierarchy within the device itself. These aren't
291 * real bus nodes, and don't have a 'ranges' property.
292 * But, we should still pass the translation work up
293 * to the SBUS itself.
294 */
295 if (!strcmp(pp->name, "dma") ||
296 !strcmp(pp->name, "espdma") ||
297 !strcmp(pp->name, "ledma") ||
298 !strcmp(pp->name, "lebuffer"))
299 return 0;
300
301 /* Similarly for all PCI bridges, if we get this far
302 * it lacks a ranges property, and this will include
303 * cases like Simba.
304 */
305 if (!strcmp(pp->name, "pci"))
306 return 0;
307
308 return 1;
309}
310
311static int of_resource_verbose;
312
313static void __init build_device_resources(struct platform_device *op,
314 struct device *parent)
315{
316 struct platform_device *p_op;
317 struct of_bus *bus;
318 int na, ns;
319 int index, num_reg;
320 const void *preg;
321
322 if (!parent)
323 return;
324
325 p_op = to_platform_device(parent);
326 bus = of_match_bus(p_op->dev.of_node);
327 bus->count_cells(op->dev.of_node, &na, &ns);
328
329 preg = of_get_property(op->dev.of_node, bus->addr_prop_name, &num_reg);
330 if (!preg || num_reg == 0)
331 return;
332
333 /* Convert to num-cells. */
334 num_reg /= 4;
335
336 /* Convert to num-entries. */
337 num_reg /= na + ns;
338
339 /* Prevent overrunning the op->resources[] array. */
340 if (num_reg > PROMREG_MAX) {
341 printk(KERN_WARNING "%s: Too many regs (%d), "
342 "limiting to %d.\n",
343 op->dev.of_node->full_name, num_reg, PROMREG_MAX);
344 num_reg = PROMREG_MAX;
345 }
346
347 op->resource = op->archdata.resource;
348 op->num_resources = num_reg;
349 for (index = 0; index < num_reg; index++) {
350 struct resource *r = &op->resource[index];
351 u32 addr[OF_MAX_ADDR_CELLS];
352 const u32 *reg = (preg + (index * ((na + ns) * 4)));
353 struct device_node *dp = op->dev.of_node;
354 struct device_node *pp = p_op->dev.of_node;
355 struct of_bus *pbus, *dbus;
356 u64 size, result = OF_BAD_ADDR;
357 unsigned long flags;
358 int dna, dns;
359 int pna, pns;
360
361 size = of_read_addr(reg + na, ns);
362 memcpy(addr, reg, na * 4);
363
364 flags = bus->get_flags(addr, 0);
365
366 if (use_1to1_mapping(pp)) {
367 result = of_read_addr(addr, na);
368 goto build_res;
369 }
370
371 dna = na;
372 dns = ns;
373 dbus = bus;
374
375 while (1) {
376 dp = pp;
377 pp = dp->parent;
378 if (!pp) {
379 result = of_read_addr(addr, dna);
380 break;
381 }
382
383 pbus = of_match_bus(pp);
384 pbus->count_cells(dp, &pna, &pns);
385
386 if (build_one_resource(dp, dbus, pbus, addr,
387 dna, dns, pna))
388 break;
389
390 flags = pbus->get_flags(addr, flags);
391
392 dna = pna;
393 dns = pns;
394 dbus = pbus;
395 }
396
397 build_res:
398 memset(r, 0, sizeof(*r));
399
400 if (of_resource_verbose)
401 printk("%s reg[%d] -> %llx\n",
402 op->dev.of_node->full_name, index,
403 result);
404
405 if (result != OF_BAD_ADDR) {
406 if (tlb_type == hypervisor)
407 result &= 0x0fffffffffffffffUL;
408
409 r->start = result;
410 r->end = result + size - 1;
411 r->flags = flags;
412 }
413 r->name = op->dev.of_node->name;
414 }
415}
416
417static struct device_node * __init
418apply_interrupt_map(struct device_node *dp, struct device_node *pp,
419 const u32 *imap, int imlen, const u32 *imask,
420 unsigned int *irq_p)
421{
422 struct device_node *cp;
423 unsigned int irq = *irq_p;
424 struct of_bus *bus;
425 phandle handle;
426 const u32 *reg;
427 int na, num_reg, i;
428
429 bus = of_match_bus(pp);
430 bus->count_cells(dp, &na, NULL);
431
432 reg = of_get_property(dp, "reg", &num_reg);
433 if (!reg || !num_reg)
434 return NULL;
435
436 imlen /= ((na + 3) * 4);
437 handle = 0;
438 for (i = 0; i < imlen; i++) {
439 int j;
440
441 for (j = 0; j < na; j++) {
442 if ((reg[j] & imask[j]) != imap[j])
443 goto next;
444 }
445 if (imap[na] == irq) {
446 handle = imap[na + 1];
447 irq = imap[na + 2];
448 break;
449 }
450
451 next:
452 imap += (na + 3);
453 }
454 if (i == imlen) {
455 /* Psycho and Sabre PCI controllers can have 'interrupt-map'
456 * properties that do not include the on-board device
457 * interrupts. Instead, the device's 'interrupts' property
458 * is already a fully specified INO value.
459 *
460 * Handle this by deciding that, if we didn't get a
461 * match in the parent's 'interrupt-map', and the
462 * parent is an IRQ translator, then use the parent as
463 * our IRQ controller.
464 */
465 if (pp->irq_trans)
466 return pp;
467
468 return NULL;
469 }
470
471 *irq_p = irq;
472 cp = of_find_node_by_phandle(handle);
473
474 return cp;
475}
476
477static unsigned int __init pci_irq_swizzle(struct device_node *dp,
478 struct device_node *pp,
479 unsigned int irq)
480{
481 const struct linux_prom_pci_registers *regs;
482 unsigned int bus, devfn, slot, ret;
483
484 if (irq < 1 || irq > 4)
485 return irq;
486
487 regs = of_get_property(dp, "reg", NULL);
488 if (!regs)
489 return irq;
490
491 bus = (regs->phys_hi >> 16) & 0xff;
492 devfn = (regs->phys_hi >> 8) & 0xff;
493 slot = (devfn >> 3) & 0x1f;
494
495 if (pp->irq_trans) {
496 /* Derived from Table 8-3, U2P User's Manual. This branch
497 * is handling a PCI controller that lacks a proper set of
498 * interrupt-map and interrupt-map-mask properties. The
499 * Ultra-E450 is one example.
500 *
501 * The bit layout is BSSLL, where:
502 * B: 0 on bus A, 1 on bus B
503 * D: 2-bit slot number, derived from PCI device number as
504 * (dev - 1) for bus A, or (dev - 2) for bus B
505 * L: 2-bit line number
506 */
507 if (bus & 0x80) {
508 /* PBM-A */
509 bus = 0x00;
510 slot = (slot - 1) << 2;
511 } else {
512 /* PBM-B */
513 bus = 0x10;
514 slot = (slot - 2) << 2;
515 }
516 irq -= 1;
517
518 ret = (bus | slot | irq);
519 } else {
520 /* Going through a PCI-PCI bridge that lacks a set of
521 * interrupt-map and interrupt-map-mask properties.
522 */
523 ret = ((irq - 1 + (slot & 3)) & 3) + 1;
524 }
525
526 return ret;
527}
528
529static int of_irq_verbose;
530
531static unsigned int __init build_one_device_irq(struct platform_device *op,
532 struct device *parent,
533 unsigned int irq)
534{
535 struct device_node *dp = op->dev.of_node;
536 struct device_node *pp, *ip;
537 unsigned int orig_irq = irq;
538 int nid;
539
540 if (irq == 0xffffffff)
541 return irq;
542
543 if (dp->irq_trans) {
544 irq = dp->irq_trans->irq_build(dp, irq,
545 dp->irq_trans->data);
546
547 if (of_irq_verbose)
548 printk("%s: direct translate %x --> %x\n",
549 dp->full_name, orig_irq, irq);
550
551 goto out;
552 }
553
554 /* Something more complicated. Walk up to the root, applying
555 * interrupt-map or bus specific translations, until we hit
556 * an IRQ translator.
557 *
558 * If we hit a bus type or situation we cannot handle, we
559 * stop and assume that the original IRQ number was in a
560 * format which has special meaning to it's immediate parent.
561 */
562 pp = dp->parent;
563 ip = NULL;
564 while (pp) {
565 const void *imap, *imsk;
566 int imlen;
567
568 imap = of_get_property(pp, "interrupt-map", &imlen);
569 imsk = of_get_property(pp, "interrupt-map-mask", NULL);
570 if (imap && imsk) {
571 struct device_node *iret;
572 int this_orig_irq = irq;
573
574 iret = apply_interrupt_map(dp, pp,
575 imap, imlen, imsk,
576 &irq);
577
578 if (of_irq_verbose)
579 printk("%s: Apply [%s:%x] imap --> [%s:%x]\n",
580 op->dev.of_node->full_name,
581 pp->full_name, this_orig_irq,
582 (iret ? iret->full_name : "NULL"), irq);
583
584 if (!iret)
585 break;
586
587 if (iret->irq_trans) {
588 ip = iret;
589 break;
590 }
591 } else {
592 if (!strcmp(pp->name, "pci")) {
593 unsigned int this_orig_irq = irq;
594
595 irq = pci_irq_swizzle(dp, pp, irq);
596 if (of_irq_verbose)
597 printk("%s: PCI swizzle [%s] "
598 "%x --> %x\n",
599 op->dev.of_node->full_name,
600 pp->full_name, this_orig_irq,
601 irq);
602
603 }
604
605 if (pp->irq_trans) {
606 ip = pp;
607 break;
608 }
609 }
610 dp = pp;
611 pp = pp->parent;
612 }
613 if (!ip)
614 return orig_irq;
615
616 irq = ip->irq_trans->irq_build(op->dev.of_node, irq,
617 ip->irq_trans->data);
618 if (of_irq_verbose)
619 printk("%s: Apply IRQ trans [%s] %x --> %x\n",
620 op->dev.of_node->full_name, ip->full_name, orig_irq, irq);
621
622out:
623 nid = of_node_to_nid(dp);
624 if (nid != -1) {
625 cpumask_t numa_mask;
626
627 cpumask_copy(&numa_mask, cpumask_of_node(nid));
628 irq_set_affinity(irq, &numa_mask);
629 }
630
631 return irq;
632}
633
634static struct platform_device * __init scan_one_device(struct device_node *dp,
635 struct device *parent)
636{
637 struct platform_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
638 const unsigned int *irq;
639 struct dev_archdata *sd;
640 int len, i;
641
642 if (!op)
643 return NULL;
644
645 sd = &op->dev.archdata;
646 sd->op = op;
647
648 op->dev.of_node = dp;
649
650 irq = of_get_property(dp, "interrupts", &len);
651 if (irq) {
652 op->archdata.num_irqs = len / 4;
653
654 /* Prevent overrunning the op->irqs[] array. */
655 if (op->archdata.num_irqs > PROMINTR_MAX) {
656 printk(KERN_WARNING "%s: Too many irqs (%d), "
657 "limiting to %d.\n",
658 dp->full_name, op->archdata.num_irqs, PROMINTR_MAX);
659 op->archdata.num_irqs = PROMINTR_MAX;
660 }
661 memcpy(op->archdata.irqs, irq, op->archdata.num_irqs * 4);
662 } else {
663 op->archdata.num_irqs = 0;
664 }
665
666 build_device_resources(op, parent);
667 for (i = 0; i < op->archdata.num_irqs; i++)
668 op->archdata.irqs[i] = build_one_device_irq(op, parent, op->archdata.irqs[i]);
669
670 op->dev.parent = parent;
671 op->dev.bus = &platform_bus_type;
672 if (!parent)
673 dev_set_name(&op->dev, "root");
674 else
675 dev_set_name(&op->dev, "%08x", dp->phandle);
676
677 if (of_device_register(op)) {
678 printk("%s: Could not register of device.\n",
679 dp->full_name);
680 kfree(op);
681 op = NULL;
682 }
683
684 return op;
685}
686
687static void __init scan_tree(struct device_node *dp, struct device *parent)
688{
689 while (dp) {
690 struct platform_device *op = scan_one_device(dp, parent);
691
692 if (op)
693 scan_tree(dp->child, &op->dev);
694
695 dp = dp->sibling;
696 }
697}
698
699static int __init scan_of_devices(void)
700{
701 struct device_node *root = of_find_node_by_path("/");
702 struct platform_device *parent;
703
704 parent = scan_one_device(root, NULL);
705 if (!parent)
706 return 0;
707
708 scan_tree(root->child, &parent->dev);
709 return 0;
710}
711postcore_initcall(scan_of_devices);
712
713static int __init of_debug(char *str)
714{
715 int val = 0;
716
717 get_option(&str, &val);
718 if (val & 1)
719 of_resource_verbose = 1;
720 if (val & 2)
721 of_irq_verbose = 1;
722 return 1;
723}
724
725__setup("of_debug=", of_debug);