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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);
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);