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
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
53
54
55
56
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
75
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
107 if (!((addr[0] ^ range[0]) & 0x03000000))
108 goto type_match;
109
110
111
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
125 memcpy(result, range + na, pna * 4);
126
127
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
143 flags = 0;
144 switch((w >> 24) & 0x03) {
145 case 0x01:
146 flags |= IORESOURCE_IO;
147 break;
148
149 case 0x02:
150 case 0x03:
151 flags |= IORESOURCE_MEM;
152 break;
153 }
154 if (w & 0x40000000)
155 flags |= IORESOURCE_PREFETCH;
156 return flags;
157}
158
159
160
161
162
163
164
165
166
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
178
179
180static struct of_bus of_busses[] = {
181
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
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
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
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
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
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
271
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
283 if (of_find_property(pp, "ranges", NULL) != NULL)
284 return 0;
285
286
287
288
289
290
291
292
293
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
302
303
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
334 num_reg /= 4;
335
336
337 num_reg /= na + ns;
338
339
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
456
457
458
459
460
461
462
463
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
497
498
499
500
501
502
503
504
505
506
507 if (bus & 0x80) {
508
509 bus = 0x00;
510 slot = (slot - 1) << 2;
511 } else {
512
513 bus = 0x10;
514 slot = (slot - 2) << 2;
515 }
516 irq -= 1;
517
518 ret = (bus | slot | irq);
519 } else {
520
521
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
555
556
557
558
559
560
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 = *cpumask_of_node(nid);
626
627 irq_set_affinity(irq, &numa_mask);
628 }
629
630 return irq;
631}
632
633static struct platform_device * __init scan_one_device(struct device_node *dp,
634 struct device *parent)
635{
636 struct platform_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
637 const unsigned int *irq;
638 struct dev_archdata *sd;
639 int len, i;
640
641 if (!op)
642 return NULL;
643
644 sd = &op->dev.archdata;
645 sd->op = op;
646
647 op->dev.of_node = dp;
648
649 irq = of_get_property(dp, "interrupts", &len);
650 if (irq) {
651 op->archdata.num_irqs = len / 4;
652
653
654 if (op->archdata.num_irqs > PROMINTR_MAX) {
655 printk(KERN_WARNING "%s: Too many irqs (%d), "
656 "limiting to %d.\n",
657 dp->full_name, op->archdata.num_irqs, PROMINTR_MAX);
658 op->archdata.num_irqs = PROMINTR_MAX;
659 }
660 memcpy(op->archdata.irqs, irq, op->archdata.num_irqs * 4);
661 } else {
662 op->archdata.num_irqs = 0;
663 }
664
665 build_device_resources(op, parent);
666 for (i = 0; i < op->archdata.num_irqs; i++)
667 op->archdata.irqs[i] = build_one_device_irq(op, parent, op->archdata.irqs[i]);
668
669 op->dev.parent = parent;
670 op->dev.bus = &platform_bus_type;
671 if (!parent)
672 dev_set_name(&op->dev, "root");
673 else
674 dev_set_name(&op->dev, "%08x", dp->phandle);
675
676 if (of_device_register(op)) {
677 printk("%s: Could not register of device.\n",
678 dp->full_name);
679 kfree(op);
680 op = NULL;
681 }
682
683 return op;
684}
685
686static void __init scan_tree(struct device_node *dp, struct device *parent)
687{
688 while (dp) {
689 struct platform_device *op = scan_one_device(dp, parent);
690
691 if (op)
692 scan_tree(dp->child, &op->dev);
693
694 dp = dp->sibling;
695 }
696}
697
698static int __init scan_of_devices(void)
699{
700 struct device_node *root = of_find_node_by_path("/");
701 struct platform_device *parent;
702
703 parent = scan_one_device(root, NULL);
704 if (!parent)
705 return 0;
706
707 scan_tree(root->child, &parent->dev);
708 return 0;
709}
710postcore_initcall(scan_of_devices);
711
712static int __init of_debug(char *str)
713{
714 int val = 0;
715
716 get_option(&str, &val);
717 if (val & 1)
718 of_resource_verbose = 1;
719 if (val & 2)
720 of_irq_verbose = 1;
721 return 1;
722}
723
724__setup("of_debug=", of_debug);
725