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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/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);
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/string.h>
3#include <linux/kernel.h>
4#include <linux/of.h>
5#include <linux/init.h>
6#include <linux/export.h>
7#include <linux/mod_devicetable.h>
8#include <linux/slab.h>
9#include <linux/errno.h>
10#include <linux/irq.h>
11#include <linux/of_device.h>
12#include <linux/of_platform.h>
13#include <asm/spitfire.h>
14
15#include "of_device_common.h"
16
17void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name)
18{
19 unsigned long ret = res->start + offset;
20 struct resource *r;
21
22 if (res->flags & IORESOURCE_MEM)
23 r = request_mem_region(ret, size, name);
24 else
25 r = request_region(ret, size, name);
26 if (!r)
27 ret = 0;
28
29 return (void __iomem *) ret;
30}
31EXPORT_SYMBOL(of_ioremap);
32
33void of_iounmap(struct resource *res, void __iomem *base, unsigned long size)
34{
35 if (res->flags & IORESOURCE_MEM)
36 release_mem_region((unsigned long) base, size);
37 else
38 release_region((unsigned long) base, size);
39}
40EXPORT_SYMBOL(of_iounmap);
41
42/*
43 * PCI bus specific translator
44 */
45
46static int of_bus_pci_match(struct device_node *np)
47{
48 if (!strcmp(np->name, "pci")) {
49 const char *model = of_get_property(np, "model", NULL);
50
51 if (model && !strcmp(model, "SUNW,simba"))
52 return 0;
53
54 /* Do not do PCI specific frobbing if the
55 * PCI bridge lacks a ranges property. We
56 * want to pass it through up to the next
57 * parent as-is, not with the PCI translate
58 * method which chops off the top address cell.
59 */
60 if (!of_find_property(np, "ranges", NULL))
61 return 0;
62
63 return 1;
64 }
65
66 return 0;
67}
68
69static int of_bus_simba_match(struct device_node *np)
70{
71 const char *model = of_get_property(np, "model", NULL);
72
73 if (model && !strcmp(model, "SUNW,simba"))
74 return 1;
75
76 /* Treat PCI busses lacking ranges property just like
77 * simba.
78 */
79 if (!strcmp(np->name, "pci")) {
80 if (!of_find_property(np, "ranges", NULL))
81 return 1;
82 }
83
84 return 0;
85}
86
87static int of_bus_simba_map(u32 *addr, const u32 *range,
88 int na, int ns, int pna)
89{
90 return 0;
91}
92
93static void of_bus_pci_count_cells(struct device_node *np,
94 int *addrc, int *sizec)
95{
96 if (addrc)
97 *addrc = 3;
98 if (sizec)
99 *sizec = 2;
100}
101
102static int of_bus_pci_map(u32 *addr, const u32 *range,
103 int na, int ns, int pna)
104{
105 u32 result[OF_MAX_ADDR_CELLS];
106 int i;
107
108 /* Check address type match */
109 if (!((addr[0] ^ range[0]) & 0x03000000))
110 goto type_match;
111
112 /* Special exception, we can map a 64-bit address into
113 * a 32-bit range.
114 */
115 if ((addr[0] & 0x03000000) == 0x03000000 &&
116 (range[0] & 0x03000000) == 0x02000000)
117 goto type_match;
118
119 return -EINVAL;
120
121type_match:
122 if (of_out_of_range(addr + 1, range + 1, range + na + pna,
123 na - 1, ns))
124 return -EINVAL;
125
126 /* Start with the parent range base. */
127 memcpy(result, range + na, pna * 4);
128
129 /* Add in the child address offset, skipping high cell. */
130 for (i = 0; i < na - 1; i++)
131 result[pna - 1 - i] +=
132 (addr[na - 1 - i] -
133 range[na - 1 - i]);
134
135 memcpy(addr, result, pna * 4);
136
137 return 0;
138}
139
140static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags)
141{
142 u32 w = addr[0];
143
144 /* For PCI, we override whatever child busses may have used. */
145 flags = 0;
146 switch((w >> 24) & 0x03) {
147 case 0x01:
148 flags |= IORESOURCE_IO;
149 break;
150
151 case 0x02: /* 32 bits */
152 case 0x03: /* 64 bits */
153 flags |= IORESOURCE_MEM;
154 break;
155 }
156 if (w & 0x40000000)
157 flags |= IORESOURCE_PREFETCH;
158 return flags;
159}
160
161/*
162 * FHC/Central bus specific translator.
163 *
164 * This is just needed to hard-code the address and size cell
165 * counts. 'fhc' and 'central' nodes lack the #address-cells and
166 * #size-cells properties, and if you walk to the root on such
167 * Enterprise boxes all you'll get is a #size-cells of 2 which is
168 * not what we want to use.
169 */
170static int of_bus_fhc_match(struct device_node *np)
171{
172 return !strcmp(np->name, "fhc") ||
173 !strcmp(np->name, "central");
174}
175
176#define of_bus_fhc_count_cells of_bus_sbus_count_cells
177
178/*
179 * Array of bus specific translators
180 */
181
182static struct of_bus of_busses[] = {
183 /* PCI */
184 {
185 .name = "pci",
186 .addr_prop_name = "assigned-addresses",
187 .match = of_bus_pci_match,
188 .count_cells = of_bus_pci_count_cells,
189 .map = of_bus_pci_map,
190 .get_flags = of_bus_pci_get_flags,
191 },
192 /* SIMBA */
193 {
194 .name = "simba",
195 .addr_prop_name = "assigned-addresses",
196 .match = of_bus_simba_match,
197 .count_cells = of_bus_pci_count_cells,
198 .map = of_bus_simba_map,
199 .get_flags = of_bus_pci_get_flags,
200 },
201 /* SBUS */
202 {
203 .name = "sbus",
204 .addr_prop_name = "reg",
205 .match = of_bus_sbus_match,
206 .count_cells = of_bus_sbus_count_cells,
207 .map = of_bus_default_map,
208 .get_flags = of_bus_default_get_flags,
209 },
210 /* FHC */
211 {
212 .name = "fhc",
213 .addr_prop_name = "reg",
214 .match = of_bus_fhc_match,
215 .count_cells = of_bus_fhc_count_cells,
216 .map = of_bus_default_map,
217 .get_flags = of_bus_default_get_flags,
218 },
219 /* Default */
220 {
221 .name = "default",
222 .addr_prop_name = "reg",
223 .match = NULL,
224 .count_cells = of_bus_default_count_cells,
225 .map = of_bus_default_map,
226 .get_flags = of_bus_default_get_flags,
227 },
228};
229
230static struct of_bus *of_match_bus(struct device_node *np)
231{
232 int i;
233
234 for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
235 if (!of_busses[i].match || of_busses[i].match(np))
236 return &of_busses[i];
237 BUG();
238 return NULL;
239}
240
241static int __init build_one_resource(struct device_node *parent,
242 struct of_bus *bus,
243 struct of_bus *pbus,
244 u32 *addr,
245 int na, int ns, int pna)
246{
247 const u32 *ranges;
248 int rone, rlen;
249
250 ranges = of_get_property(parent, "ranges", &rlen);
251 if (ranges == NULL || rlen == 0) {
252 u32 result[OF_MAX_ADDR_CELLS];
253 int i;
254
255 memset(result, 0, pna * 4);
256 for (i = 0; i < na; i++)
257 result[pna - 1 - i] =
258 addr[na - 1 - i];
259
260 memcpy(addr, result, pna * 4);
261 return 0;
262 }
263
264 /* Now walk through the ranges */
265 rlen /= 4;
266 rone = na + pna + ns;
267 for (; rlen >= rone; rlen -= rone, ranges += rone) {
268 if (!bus->map(addr, ranges, na, ns, pna))
269 return 0;
270 }
271
272 /* When we miss an I/O space match on PCI, just pass it up
273 * to the next PCI bridge and/or controller.
274 */
275 if (!strcmp(bus->name, "pci") &&
276 (addr[0] & 0x03000000) == 0x01000000)
277 return 0;
278
279 return 1;
280}
281
282static int __init use_1to1_mapping(struct device_node *pp)
283{
284 /* If we have a ranges property in the parent, use it. */
285 if (of_find_property(pp, "ranges", NULL) != NULL)
286 return 0;
287
288 /* If the parent is the dma node of an ISA bus, pass
289 * the translation up to the root.
290 *
291 * Some SBUS devices use intermediate nodes to express
292 * hierarchy within the device itself. These aren't
293 * real bus nodes, and don't have a 'ranges' property.
294 * But, we should still pass the translation work up
295 * to the SBUS itself.
296 */
297 if (!strcmp(pp->name, "dma") ||
298 !strcmp(pp->name, "espdma") ||
299 !strcmp(pp->name, "ledma") ||
300 !strcmp(pp->name, "lebuffer"))
301 return 0;
302
303 /* Similarly for all PCI bridges, if we get this far
304 * it lacks a ranges property, and this will include
305 * cases like Simba.
306 */
307 if (!strcmp(pp->name, "pci"))
308 return 0;
309
310 return 1;
311}
312
313static int of_resource_verbose;
314
315static void __init build_device_resources(struct platform_device *op,
316 struct device *parent)
317{
318 struct platform_device *p_op;
319 struct of_bus *bus;
320 int na, ns;
321 int index, num_reg;
322 const void *preg;
323
324 if (!parent)
325 return;
326
327 p_op = to_platform_device(parent);
328 bus = of_match_bus(p_op->dev.of_node);
329 bus->count_cells(op->dev.of_node, &na, &ns);
330
331 preg = of_get_property(op->dev.of_node, bus->addr_prop_name, &num_reg);
332 if (!preg || num_reg == 0)
333 return;
334
335 /* Convert to num-cells. */
336 num_reg /= 4;
337
338 /* Convert to num-entries. */
339 num_reg /= na + ns;
340
341 /* Prevent overrunning the op->resources[] array. */
342 if (num_reg > PROMREG_MAX) {
343 printk(KERN_WARNING "%s: Too many regs (%d), "
344 "limiting to %d.\n",
345 op->dev.of_node->full_name, num_reg, PROMREG_MAX);
346 num_reg = PROMREG_MAX;
347 }
348
349 op->resource = op->archdata.resource;
350 op->num_resources = num_reg;
351 for (index = 0; index < num_reg; index++) {
352 struct resource *r = &op->resource[index];
353 u32 addr[OF_MAX_ADDR_CELLS];
354 const u32 *reg = (preg + (index * ((na + ns) * 4)));
355 struct device_node *dp = op->dev.of_node;
356 struct device_node *pp = p_op->dev.of_node;
357 struct of_bus *pbus, *dbus;
358 u64 size, result = OF_BAD_ADDR;
359 unsigned long flags;
360 int dna, dns;
361 int pna, pns;
362
363 size = of_read_addr(reg + na, ns);
364 memcpy(addr, reg, na * 4);
365
366 flags = bus->get_flags(addr, 0);
367
368 if (use_1to1_mapping(pp)) {
369 result = of_read_addr(addr, na);
370 goto build_res;
371 }
372
373 dna = na;
374 dns = ns;
375 dbus = bus;
376
377 while (1) {
378 dp = pp;
379 pp = dp->parent;
380 if (!pp) {
381 result = of_read_addr(addr, dna);
382 break;
383 }
384
385 pbus = of_match_bus(pp);
386 pbus->count_cells(dp, &pna, &pns);
387
388 if (build_one_resource(dp, dbus, pbus, addr,
389 dna, dns, pna))
390 break;
391
392 flags = pbus->get_flags(addr, flags);
393
394 dna = pna;
395 dns = pns;
396 dbus = pbus;
397 }
398
399 build_res:
400 memset(r, 0, sizeof(*r));
401
402 if (of_resource_verbose)
403 printk("%s reg[%d] -> %llx\n",
404 op->dev.of_node->full_name, index,
405 result);
406
407 if (result != OF_BAD_ADDR) {
408 if (tlb_type == hypervisor)
409 result &= 0x0fffffffffffffffUL;
410
411 r->start = result;
412 r->end = result + size - 1;
413 r->flags = flags;
414 }
415 r->name = op->dev.of_node->name;
416 }
417}
418
419static struct device_node * __init
420apply_interrupt_map(struct device_node *dp, struct device_node *pp,
421 const u32 *imap, int imlen, const u32 *imask,
422 unsigned int *irq_p)
423{
424 struct device_node *cp;
425 unsigned int irq = *irq_p;
426 struct of_bus *bus;
427 phandle handle;
428 const u32 *reg;
429 int na, num_reg, i;
430
431 bus = of_match_bus(pp);
432 bus->count_cells(dp, &na, NULL);
433
434 reg = of_get_property(dp, "reg", &num_reg);
435 if (!reg || !num_reg)
436 return NULL;
437
438 imlen /= ((na + 3) * 4);
439 handle = 0;
440 for (i = 0; i < imlen; i++) {
441 int j;
442
443 for (j = 0; j < na; j++) {
444 if ((reg[j] & imask[j]) != imap[j])
445 goto next;
446 }
447 if (imap[na] == irq) {
448 handle = imap[na + 1];
449 irq = imap[na + 2];
450 break;
451 }
452
453 next:
454 imap += (na + 3);
455 }
456 if (i == imlen) {
457 /* Psycho and Sabre PCI controllers can have 'interrupt-map'
458 * properties that do not include the on-board device
459 * interrupts. Instead, the device's 'interrupts' property
460 * is already a fully specified INO value.
461 *
462 * Handle this by deciding that, if we didn't get a
463 * match in the parent's 'interrupt-map', and the
464 * parent is an IRQ translator, then use the parent as
465 * our IRQ controller.
466 */
467 if (pp->irq_trans)
468 return pp;
469
470 return NULL;
471 }
472
473 *irq_p = irq;
474 cp = of_find_node_by_phandle(handle);
475
476 return cp;
477}
478
479static unsigned int __init pci_irq_swizzle(struct device_node *dp,
480 struct device_node *pp,
481 unsigned int irq)
482{
483 const struct linux_prom_pci_registers *regs;
484 unsigned int bus, devfn, slot, ret;
485
486 if (irq < 1 || irq > 4)
487 return irq;
488
489 regs = of_get_property(dp, "reg", NULL);
490 if (!regs)
491 return irq;
492
493 bus = (regs->phys_hi >> 16) & 0xff;
494 devfn = (regs->phys_hi >> 8) & 0xff;
495 slot = (devfn >> 3) & 0x1f;
496
497 if (pp->irq_trans) {
498 /* Derived from Table 8-3, U2P User's Manual. This branch
499 * is handling a PCI controller that lacks a proper set of
500 * interrupt-map and interrupt-map-mask properties. The
501 * Ultra-E450 is one example.
502 *
503 * The bit layout is BSSLL, where:
504 * B: 0 on bus A, 1 on bus B
505 * D: 2-bit slot number, derived from PCI device number as
506 * (dev - 1) for bus A, or (dev - 2) for bus B
507 * L: 2-bit line number
508 */
509 if (bus & 0x80) {
510 /* PBM-A */
511 bus = 0x00;
512 slot = (slot - 1) << 2;
513 } else {
514 /* PBM-B */
515 bus = 0x10;
516 slot = (slot - 2) << 2;
517 }
518 irq -= 1;
519
520 ret = (bus | slot | irq);
521 } else {
522 /* Going through a PCI-PCI bridge that lacks a set of
523 * interrupt-map and interrupt-map-mask properties.
524 */
525 ret = ((irq - 1 + (slot & 3)) & 3) + 1;
526 }
527
528 return ret;
529}
530
531static int of_irq_verbose;
532
533static unsigned int __init build_one_device_irq(struct platform_device *op,
534 struct device *parent,
535 unsigned int irq)
536{
537 struct device_node *dp = op->dev.of_node;
538 struct device_node *pp, *ip;
539 unsigned int orig_irq = irq;
540 int nid;
541
542 if (irq == 0xffffffff)
543 return irq;
544
545 if (dp->irq_trans) {
546 irq = dp->irq_trans->irq_build(dp, irq,
547 dp->irq_trans->data);
548
549 if (of_irq_verbose)
550 printk("%s: direct translate %x --> %x\n",
551 dp->full_name, orig_irq, irq);
552
553 goto out;
554 }
555
556 /* Something more complicated. Walk up to the root, applying
557 * interrupt-map or bus specific translations, until we hit
558 * an IRQ translator.
559 *
560 * If we hit a bus type or situation we cannot handle, we
561 * stop and assume that the original IRQ number was in a
562 * format which has special meaning to it's immediate parent.
563 */
564 pp = dp->parent;
565 ip = NULL;
566 while (pp) {
567 const void *imap, *imsk;
568 int imlen;
569
570 imap = of_get_property(pp, "interrupt-map", &imlen);
571 imsk = of_get_property(pp, "interrupt-map-mask", NULL);
572 if (imap && imsk) {
573 struct device_node *iret;
574 int this_orig_irq = irq;
575
576 iret = apply_interrupt_map(dp, pp,
577 imap, imlen, imsk,
578 &irq);
579
580 if (of_irq_verbose)
581 printk("%s: Apply [%s:%x] imap --> [%s:%x]\n",
582 op->dev.of_node->full_name,
583 pp->full_name, this_orig_irq,
584 of_node_full_name(iret), irq);
585
586 if (!iret)
587 break;
588
589 if (iret->irq_trans) {
590 ip = iret;
591 break;
592 }
593 } else {
594 if (!strcmp(pp->name, "pci")) {
595 unsigned int this_orig_irq = irq;
596
597 irq = pci_irq_swizzle(dp, pp, irq);
598 if (of_irq_verbose)
599 printk("%s: PCI swizzle [%s] "
600 "%x --> %x\n",
601 op->dev.of_node->full_name,
602 pp->full_name, this_orig_irq,
603 irq);
604
605 }
606
607 if (pp->irq_trans) {
608 ip = pp;
609 break;
610 }
611 }
612 dp = pp;
613 pp = pp->parent;
614 }
615 if (!ip)
616 return orig_irq;
617
618 irq = ip->irq_trans->irq_build(op->dev.of_node, irq,
619 ip->irq_trans->data);
620 if (of_irq_verbose)
621 printk("%s: Apply IRQ trans [%s] %x --> %x\n",
622 op->dev.of_node->full_name, ip->full_name, orig_irq, irq);
623
624out:
625 nid = of_node_to_nid(dp);
626 if (nid != -1) {
627 cpumask_t numa_mask;
628
629 cpumask_copy(&numa_mask, cpumask_of_node(nid));
630 irq_set_affinity(irq, &numa_mask);
631 }
632
633 return irq;
634}
635
636static struct platform_device * __init scan_one_device(struct device_node *dp,
637 struct device *parent)
638{
639 struct platform_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
640 const unsigned int *irq;
641 struct dev_archdata *sd;
642 int len, i;
643
644 if (!op)
645 return NULL;
646
647 sd = &op->dev.archdata;
648 sd->op = op;
649
650 op->dev.of_node = dp;
651
652 irq = of_get_property(dp, "interrupts", &len);
653 if (irq) {
654 op->archdata.num_irqs = len / 4;
655
656 /* Prevent overrunning the op->irqs[] array. */
657 if (op->archdata.num_irqs > PROMINTR_MAX) {
658 printk(KERN_WARNING "%s: Too many irqs (%d), "
659 "limiting to %d.\n",
660 dp->full_name, op->archdata.num_irqs, PROMINTR_MAX);
661 op->archdata.num_irqs = PROMINTR_MAX;
662 }
663 memcpy(op->archdata.irqs, irq, op->archdata.num_irqs * 4);
664 } else {
665 op->archdata.num_irqs = 0;
666 }
667
668 build_device_resources(op, parent);
669 for (i = 0; i < op->archdata.num_irqs; i++)
670 op->archdata.irqs[i] = build_one_device_irq(op, parent, op->archdata.irqs[i]);
671
672 op->dev.parent = parent;
673 op->dev.bus = &platform_bus_type;
674 if (!parent)
675 dev_set_name(&op->dev, "root");
676 else
677 dev_set_name(&op->dev, "%08x", dp->phandle);
678
679 if (of_device_register(op)) {
680 printk("%s: Could not register of device.\n",
681 dp->full_name);
682 kfree(op);
683 op = NULL;
684 }
685
686 return op;
687}
688
689static void __init scan_tree(struct device_node *dp, struct device *parent)
690{
691 while (dp) {
692 struct platform_device *op = scan_one_device(dp, parent);
693
694 if (op)
695 scan_tree(dp->child, &op->dev);
696
697 dp = dp->sibling;
698 }
699}
700
701static int __init scan_of_devices(void)
702{
703 struct device_node *root = of_find_node_by_path("/");
704 struct platform_device *parent;
705
706 parent = scan_one_device(root, NULL);
707 if (!parent)
708 return 0;
709
710 scan_tree(root->child, &parent->dev);
711 return 0;
712}
713postcore_initcall(scan_of_devices);
714
715static int __init of_debug(char *str)
716{
717 int val = 0;
718
719 get_option(&str, &val);
720 if (val & 1)
721 of_resource_verbose = 1;
722 if (val & 2)
723 of_irq_verbose = 1;
724 return 1;
725}
726
727__setup("of_debug=", of_debug);