3 #include <linux/kernel.h>
4 #include <linux/string.h>
5 #include <linux/pci_regs.h>
6 #include <linux/module.h>
7 #include <linux/ioport.h>
8 #include <linux/etherdevice.h>
10 #include <asm/pci-bridge.h>
13 #define DBG(fmt...) do { printk(fmt); } while(0)
15 #define DBG(fmt...) do { } while(0)
24 /* Max address size we deal with */
25 #define OF_MAX_ADDR_CELLS 4
26 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
29 static struct of_bus *of_match_bus(struct device_node *np);
30 static int __of_address_to_resource(struct device_node *dev,
31 const u32 *addrp, u64 size, unsigned int flags,
37 static void of_dump_addr(const char *s, const u32 *addr, int na)
41 printk(" %08x", *(addr++));
45 static void of_dump_addr(const char *s, const u32 *addr, int na) { }
49 /* Callbacks for bus specific translators */
52 const char *addresses;
53 int (*match)(struct device_node *parent);
54 void (*count_cells)(struct device_node *child,
55 int *addrc, int *sizec);
56 u64 (*map)(u32 *addr, const u32 *range,
57 int na, int ns, int pna);
58 int (*translate)(u32 *addr, u64 offset, int na);
59 unsigned int (*get_flags)(const u32 *addr);
64 * Default translator (generic bus)
67 static void of_bus_default_count_cells(struct device_node *dev,
68 int *addrc, int *sizec)
71 *addrc = of_n_addr_cells(dev);
73 *sizec = of_n_size_cells(dev);
76 static u64 of_bus_default_map(u32 *addr, const u32 *range,
77 int na, int ns, int pna)
81 cp = of_read_number(range, na);
82 s = of_read_number(range + na + pna, ns);
83 da = of_read_number(addr, na);
85 DBG("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
88 if (da < cp || da >= (cp + s))
93 static int of_bus_default_translate(u32 *addr, u64 offset, int na)
95 u64 a = of_read_number(addr, na);
96 memset(addr, 0, na * 4);
99 addr[na - 2] = a >> 32;
100 addr[na - 1] = a & 0xffffffffu;
105 static unsigned int of_bus_default_get_flags(const u32 *addr)
107 return IORESOURCE_MEM;
113 * PCI bus specific translator
116 static int of_bus_pci_match(struct device_node *np)
118 /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
119 return !strcmp(np->type, "pci") || !strcmp(np->type, "vci");
122 static void of_bus_pci_count_cells(struct device_node *np,
123 int *addrc, int *sizec)
131 static unsigned int of_bus_pci_get_flags(const u32 *addr)
133 unsigned int flags = 0;
136 switch((w >> 24) & 0x03) {
138 flags |= IORESOURCE_IO;
140 case 0x02: /* 32 bits */
141 case 0x03: /* 64 bits */
142 flags |= IORESOURCE_MEM;
146 flags |= IORESOURCE_PREFETCH;
150 static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna)
155 af = of_bus_pci_get_flags(addr);
156 rf = of_bus_pci_get_flags(range);
158 /* Check address type match */
159 if ((af ^ rf) & (IORESOURCE_MEM | IORESOURCE_IO))
162 /* Read address values, skipping high cell */
163 cp = of_read_number(range + 1, na - 1);
164 s = of_read_number(range + na + pna, ns);
165 da = of_read_number(addr + 1, na - 1);
167 DBG("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
169 if (da < cp || da >= (cp + s))
174 static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
176 return of_bus_default_translate(addr + 1, offset, na - 1);
179 const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
184 struct device_node *parent;
186 int onesize, i, na, ns;
188 /* Get parent & match bus type */
189 parent = of_get_parent(dev);
192 bus = of_match_bus(parent);
193 if (strcmp(bus->name, "pci")) {
197 bus->count_cells(dev, &na, &ns);
199 if (!OF_CHECK_COUNTS(na, ns))
202 /* Get "reg" or "assigned-addresses" property */
203 prop = of_get_property(dev, bus->addresses, &psize);
209 for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
210 if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) {
212 *size = of_read_number(prop + na, ns);
214 *flags = bus->get_flags(prop);
219 EXPORT_SYMBOL(of_get_pci_address);
221 int of_pci_address_to_resource(struct device_node *dev, int bar,
228 addrp = of_get_pci_address(dev, bar, &size, &flags);
231 return __of_address_to_resource(dev, addrp, size, flags, r);
233 EXPORT_SYMBOL_GPL(of_pci_address_to_resource);
235 static u8 of_irq_pci_swizzle(u8 slot, u8 pin)
237 return (((pin - 1) + slot) % 4) + 1;
240 int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
242 struct device_node *dn, *ppnode;
243 struct pci_dev *ppdev;
249 /* Check if we have a device node, if yes, fallback to standard OF
252 dn = pci_device_to_OF_node(pdev);
254 return of_irq_map_one(dn, 0, out_irq);
256 /* Ok, we don't, time to have fun. Let's start by building up an
257 * interrupt spec. we assume #interrupt-cells is 1, which is standard
258 * for PCI. If you do different, then don't use that routine.
260 rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
267 /* Now we walk up the PCI tree */
270 /* Get the pci_dev of our parent */
271 ppdev = pdev->bus->self;
273 /* Ouch, it's a host bridge... */
276 ppnode = pci_bus_to_OF_node(pdev->bus);
278 struct pci_controller *host;
279 host = pci_bus_to_host(pdev->bus);
280 ppnode = host ? host->dn : NULL;
282 /* No node for host bridge ? give up */
286 /* We found a P2P bridge, check if it has a node */
287 ppnode = pci_device_to_OF_node(ppdev);
289 /* Ok, we have found a parent with a device-node, hand over to
290 * the OF parsing code.
291 * We build a unit address from the linux device to be used for
292 * resolution. Note that we use the linux bus number which may
293 * not match your firmware bus numbering.
294 * Fortunately, in most cases, interrupt-map-mask doesn't include
295 * the bus number as part of the matching.
296 * You should still be careful about that though if you intend
297 * to rely on this function (you ship a firmware that doesn't
298 * create device nodes for all PCI devices).
303 /* We can only get here if we hit a P2P bridge with no node,
304 * let's do standard swizzling and try again
306 lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec);
310 laddr[0] = (pdev->bus->number << 16)
311 | (pdev->devfn << 8);
312 laddr[1] = laddr[2] = 0;
313 return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
315 EXPORT_SYMBOL_GPL(of_irq_map_pci);
316 #endif /* CONFIG_PCI */
319 * ISA bus specific translator
322 static int of_bus_isa_match(struct device_node *np)
324 return !strcmp(np->name, "isa");
327 static void of_bus_isa_count_cells(struct device_node *child,
328 int *addrc, int *sizec)
336 static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna)
340 /* Check address type match */
341 if ((addr[0] ^ range[0]) & 0x00000001)
344 /* Read address values, skipping high cell */
345 cp = of_read_number(range + 1, na - 1);
346 s = of_read_number(range + na + pna, ns);
347 da = of_read_number(addr + 1, na - 1);
349 DBG("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
351 if (da < cp || da >= (cp + s))
356 static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
358 return of_bus_default_translate(addr + 1, offset, na - 1);
361 static unsigned int of_bus_isa_get_flags(const u32 *addr)
363 unsigned int flags = 0;
367 flags |= IORESOURCE_IO;
369 flags |= IORESOURCE_MEM;
375 * Array of bus specific translators
378 static struct of_bus of_busses[] = {
383 .addresses = "assigned-addresses",
384 .match = of_bus_pci_match,
385 .count_cells = of_bus_pci_count_cells,
386 .map = of_bus_pci_map,
387 .translate = of_bus_pci_translate,
388 .get_flags = of_bus_pci_get_flags,
390 #endif /* CONFIG_PCI */
395 .match = of_bus_isa_match,
396 .count_cells = of_bus_isa_count_cells,
397 .map = of_bus_isa_map,
398 .translate = of_bus_isa_translate,
399 .get_flags = of_bus_isa_get_flags,
406 .count_cells = of_bus_default_count_cells,
407 .map = of_bus_default_map,
408 .translate = of_bus_default_translate,
409 .get_flags = of_bus_default_get_flags,
413 static struct of_bus *of_match_bus(struct device_node *np)
417 for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
418 if (!of_busses[i].match || of_busses[i].match(np))
419 return &of_busses[i];
424 static int of_translate_one(struct device_node *parent, struct of_bus *bus,
425 struct of_bus *pbus, u32 *addr,
426 int na, int ns, int pna, const char *rprop)
431 u64 offset = OF_BAD_ADDR;
433 /* Normally, an absence of a "ranges" property means we are
434 * crossing a non-translatable boundary, and thus the addresses
435 * below the current not cannot be converted to CPU physical ones.
436 * Unfortunately, while this is very clear in the spec, it's not
437 * what Apple understood, and they do have things like /uni-n or
438 * /ht nodes with no "ranges" property and a lot of perfectly
439 * useable mapped devices below them. Thus we treat the absence of
440 * "ranges" as equivalent to an empty "ranges" property which means
441 * a 1:1 translation at that level. It's up to the caller not to try
442 * to translate addresses that aren't supposed to be translated in
443 * the first place. --BenH.
445 ranges = of_get_property(parent, rprop, &rlen);
446 if (ranges == NULL || rlen == 0) {
447 offset = of_read_number(addr, na);
448 memset(addr, 0, pna * 4);
449 DBG("OF: no ranges, 1:1 translation\n");
453 DBG("OF: walking ranges...\n");
455 /* Now walk through the ranges */
457 rone = na + pna + ns;
458 for (; rlen >= rone; rlen -= rone, ranges += rone) {
459 offset = bus->map(addr, ranges, na, ns, pna);
460 if (offset != OF_BAD_ADDR)
463 if (offset == OF_BAD_ADDR) {
464 DBG("OF: not found !\n");
467 memcpy(addr, ranges + na, 4 * pna);
470 of_dump_addr("OF: parent translation for:", addr, pna);
471 DBG("OF: with offset: "PRu64"\n", offset);
473 /* Translate it into parent bus space */
474 return pbus->translate(addr, offset, pna);
479 * Translate an address from the device-tree into a CPU physical address,
480 * this walks up the tree and applies the various bus mappings on the
483 * Note: We consider that crossing any level with #size-cells == 0 to mean
484 * that translation is impossible (that is we are not dealing with a value
485 * that can be mapped to a cpu physical address). This is not really specified
486 * that way, but this is traditionally the way IBM at least do things
488 u64 __of_translate_address(struct device_node *dev, const u32 *in_addr,
491 struct device_node *parent = NULL;
492 struct of_bus *bus, *pbus;
493 u32 addr[OF_MAX_ADDR_CELLS];
494 int na, ns, pna, pns;
495 u64 result = OF_BAD_ADDR;
497 DBG("OF: ** translation for device %s **\n", dev->full_name);
499 /* Increase refcount at current level */
502 /* Get parent & match bus type */
503 parent = of_get_parent(dev);
506 bus = of_match_bus(parent);
508 /* Cound address cells & copy address locally */
509 bus->count_cells(dev, &na, &ns);
510 if (!OF_CHECK_COUNTS(na, ns)) {
511 printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
515 memcpy(addr, in_addr, na * 4);
517 DBG("OF: bus is %s (na=%d, ns=%d) on %s\n",
518 bus->name, na, ns, parent->full_name);
519 of_dump_addr("OF: translating address:", addr, na);
523 /* Switch to parent bus */
526 parent = of_get_parent(dev);
528 /* If root, we have finished */
529 if (parent == NULL) {
530 DBG("OF: reached root node\n");
531 result = of_read_number(addr, na);
535 /* Get new parent bus and counts */
536 pbus = of_match_bus(parent);
537 pbus->count_cells(dev, &pna, &pns);
538 if (!OF_CHECK_COUNTS(pna, pns)) {
539 printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
544 DBG("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
545 pbus->name, pna, pns, parent->full_name);
547 /* Apply bus translation */
548 if (of_translate_one(dev, bus, pbus, addr, na, ns, pna, rprop))
551 /* Complete the move up one level */
556 of_dump_addr("OF: one level translation:", addr, na);
565 u64 of_translate_address(struct device_node *dev, const u32 *in_addr)
567 return __of_translate_address(dev, in_addr, "ranges");
569 EXPORT_SYMBOL(of_translate_address);
571 u64 of_translate_dma_address(struct device_node *dev, const u32 *in_addr)
573 return __of_translate_address(dev, in_addr, "dma-ranges");
575 EXPORT_SYMBOL(of_translate_dma_address);
577 const u32 *of_get_address(struct device_node *dev, int index, u64 *size,
582 struct device_node *parent;
584 int onesize, i, na, ns;
586 /* Get parent & match bus type */
587 parent = of_get_parent(dev);
590 bus = of_match_bus(parent);
591 bus->count_cells(dev, &na, &ns);
593 if (!OF_CHECK_COUNTS(na, ns))
596 /* Get "reg" or "assigned-addresses" property */
597 prop = of_get_property(dev, bus->addresses, &psize);
603 for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
606 *size = of_read_number(prop + na, ns);
608 *flags = bus->get_flags(prop);
613 EXPORT_SYMBOL(of_get_address);
615 static int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
616 u64 size, unsigned int flags,
621 if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
623 taddr = of_translate_address(dev, addrp);
624 if (taddr == OF_BAD_ADDR)
626 memset(r, 0, sizeof(struct resource));
627 if (flags & IORESOURCE_IO) {
629 port = pci_address_to_pio(taddr);
630 if (port == (unsigned long)-1)
633 r->end = port + size - 1;
636 r->end = taddr + size - 1;
643 int of_address_to_resource(struct device_node *dev, int index,
650 addrp = of_get_address(dev, index, &size, &flags);
653 return __of_address_to_resource(dev, addrp, size, flags, r);
655 EXPORT_SYMBOL_GPL(of_address_to_resource);
657 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
658 unsigned long *busno, unsigned long *phys, unsigned long *size)
660 const u32 *dma_window;
662 const unsigned char *prop;
664 dma_window = dma_window_prop;
666 /* busno is always one cell */
667 *busno = *(dma_window++);
669 prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
671 prop = of_get_property(dn, "#address-cells", NULL);
673 cells = prop ? *(u32 *)prop : of_n_addr_cells(dn);
674 *phys = of_read_number(dma_window, cells);
678 prop = of_get_property(dn, "ibm,#dma-size-cells", NULL);
679 cells = prop ? *(u32 *)prop : of_n_size_cells(dn);
680 *size = of_read_number(dma_window, cells);
687 static unsigned int of_irq_workarounds;
688 static struct device_node *of_irq_dflt_pic;
690 static struct device_node *of_irq_find_parent(struct device_node *child)
692 struct device_node *p;
695 if (!of_node_get(child))
699 parp = of_get_property(child, "interrupt-parent", NULL);
701 p = of_get_parent(child);
703 if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
704 p = of_node_get(of_irq_dflt_pic);
706 p = of_find_node_by_phandle(*parp);
710 } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
715 /* This doesn't need to be called if you don't have any special workaround
718 void of_irq_map_init(unsigned int flags)
720 of_irq_workarounds = flags;
722 /* OldWorld, don't bother looking at other things */
723 if (flags & OF_IMAP_OLDWORLD_MAC)
726 /* If we don't have phandles, let's try to locate a default interrupt
727 * controller (happens when booting with BootX). We do a first match
728 * here, hopefully, that only ever happens on machines with one
731 if (flags & OF_IMAP_NO_PHANDLE) {
732 struct device_node *np;
734 for_each_node_with_property(np, "interrupt-controller") {
735 /* Skip /chosen/interrupt-controller */
736 if (strcmp(np->name, "chosen") == 0)
738 /* It seems like at least one person on this planet wants
739 * to use BootX on a machine with an AppleKiwi controller
740 * which happens to pretend to be an interrupt
743 if (strcmp(np->name, "AppleKiwi") == 0)
745 /* I think we found one ! */
746 of_irq_dflt_pic = np;
753 int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
754 const u32 *addr, struct of_irq *out_irq)
756 struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
757 const u32 *tmp, *imap, *imask;
758 u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
759 int imaplen, match, i;
761 DBG("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],ointsize=%d\n",
762 parent->full_name, intspec[0], intspec[1], ointsize);
764 ipar = of_node_get(parent);
766 /* First get the #interrupt-cells property of the current cursor
767 * that tells us how to interpret the passed-in intspec. If there
768 * is none, we are nice and just walk up the tree
771 tmp = of_get_property(ipar, "#interrupt-cells", NULL);
777 ipar = of_irq_find_parent(ipar);
781 DBG(" -> no parent found !\n");
785 DBG("of_irq_map_raw: ipar=%s, size=%d\n", ipar->full_name, intsize);
787 if (ointsize != intsize)
790 /* Look for this #address-cells. We have to implement the old linux
791 * trick of looking for the parent here as some device-trees rely on it
793 old = of_node_get(ipar);
795 tmp = of_get_property(old, "#address-cells", NULL);
796 tnode = of_get_parent(old);
799 } while(old && tmp == NULL);
802 addrsize = (tmp == NULL) ? 2 : *tmp;
804 DBG(" -> addrsize=%d\n", addrsize);
806 /* Now start the actual "proper" walk of the interrupt tree */
807 while (ipar != NULL) {
808 /* Now check if cursor is an interrupt-controller and if it is
811 if (of_get_property(ipar, "interrupt-controller", NULL) !=
813 DBG(" -> got it !\n");
814 memcpy(out_irq->specifier, intspec,
815 intsize * sizeof(u32));
816 out_irq->size = intsize;
817 out_irq->controller = ipar;
822 /* Now look for an interrupt-map */
823 imap = of_get_property(ipar, "interrupt-map", &imaplen);
824 /* No interrupt map, check for an interrupt parent */
826 DBG(" -> no map, getting parent\n");
827 newpar = of_irq_find_parent(ipar);
830 imaplen /= sizeof(u32);
832 /* Look for a mask */
833 imask = of_get_property(ipar, "interrupt-map-mask", NULL);
835 /* If we were passed no "reg" property and we attempt to parse
836 * an interrupt-map, then #address-cells must be 0.
839 if (addr == NULL && addrsize != 0) {
840 DBG(" -> no reg passed in when needed !\n");
844 /* Parse interrupt-map */
846 while (imaplen > (addrsize + intsize + 1) && !match) {
847 /* Compare specifiers */
849 for (i = 0; i < addrsize && match; ++i) {
850 u32 mask = imask ? imask[i] : 0xffffffffu;
851 match = ((addr[i] ^ imap[i]) & mask) == 0;
853 for (; i < (addrsize + intsize) && match; ++i) {
854 u32 mask = imask ? imask[i] : 0xffffffffu;
856 ((intspec[i-addrsize] ^ imap[i]) & mask) == 0;
858 imap += addrsize + intsize;
859 imaplen -= addrsize + intsize;
861 DBG(" -> match=%d (imaplen=%d)\n", match, imaplen);
863 /* Get the interrupt parent */
864 if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
865 newpar = of_node_get(of_irq_dflt_pic);
867 newpar = of_find_node_by_phandle((phandle)*imap);
871 /* Check if not found */
872 if (newpar == NULL) {
873 DBG(" -> imap parent not found !\n");
877 /* Get #interrupt-cells and #address-cells of new
880 tmp = of_get_property(newpar, "#interrupt-cells", NULL);
882 DBG(" -> parent lacks #interrupt-cells !\n");
886 tmp = of_get_property(newpar, "#address-cells", NULL);
887 newaddrsize = (tmp == NULL) ? 0 : *tmp;
889 DBG(" -> newintsize=%d, newaddrsize=%d\n",
890 newintsize, newaddrsize);
892 /* Check for malformed properties */
893 if (imaplen < (newaddrsize + newintsize))
896 imap += newaddrsize + newintsize;
897 imaplen -= newaddrsize + newintsize;
899 DBG(" -> imaplen=%d\n", imaplen);
905 old = of_node_get(newpar);
906 addrsize = newaddrsize;
907 intsize = newintsize;
908 intspec = imap - intsize;
909 addr = intspec - addrsize;
912 /* Iterate again with new parent */
913 DBG(" -> new parent: %s\n", newpar ? newpar->full_name : "<>");
925 EXPORT_SYMBOL_GPL(of_irq_map_raw);
927 #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
928 static int of_irq_map_oldworld(struct device_node *device, int index,
929 struct of_irq *out_irq)
931 const u32 *ints = NULL;
935 * Old machines just have a list of interrupt numbers
936 * and no interrupt-controller nodes. We also have dodgy
937 * cases where the APPL,interrupts property is completely
938 * missing behind pci-pci bridges and we have to get it
939 * from the parent (the bridge itself, as apple just wired
940 * everything together on these)
943 ints = of_get_property(device, "AAPL,interrupts", &intlen);
946 device = device->parent;
947 if (device && strcmp(device->type, "pci") != 0)
952 intlen /= sizeof(u32);
957 out_irq->controller = NULL;
958 out_irq->specifier[0] = ints[index];
963 #else /* defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) */
964 static int of_irq_map_oldworld(struct device_node *device, int index,
965 struct of_irq *out_irq)
969 #endif /* !(defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)) */
971 int of_irq_map_one(struct device_node *device, int index, struct of_irq *out_irq)
973 struct device_node *p;
974 const u32 *intspec, *tmp, *addr;
978 DBG("of_irq_map_one: dev=%s, index=%d\n", device->full_name, index);
980 /* OldWorld mac stuff is "special", handle out of line */
981 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
982 return of_irq_map_oldworld(device, index, out_irq);
984 /* Get the interrupts property */
985 intspec = of_get_property(device, "interrupts", &intlen);
988 intlen /= sizeof(u32);
990 /* Get the reg property (if any) */
991 addr = of_get_property(device, "reg", NULL);
993 /* Look for the interrupt parent. */
994 p = of_irq_find_parent(device);
998 /* Get size of interrupt specifier */
999 tmp = of_get_property(p, "#interrupt-cells", NULL);
1006 DBG(" intsize=%d intlen=%d\n", intsize, intlen);
1009 if ((index + 1) * intsize > intlen)
1012 /* Get new specifier and map it */
1013 res = of_irq_map_raw(p, intspec + index * intsize, intsize,
1018 EXPORT_SYMBOL_GPL(of_irq_map_one);
1021 * Search the device tree for the best MAC address to use. 'mac-address' is
1022 * checked first, because that is supposed to contain to "most recent" MAC
1023 * address. If that isn't set, then 'local-mac-address' is checked next,
1024 * because that is the default address. If that isn't set, then the obsolete
1025 * 'address' is checked, just in case we're using an old device tree.
1027 * Note that the 'address' property is supposed to contain a virtual address of
1028 * the register set, but some DTS files have redefined that property to be the
1031 * All-zero MAC addresses are rejected, because those could be properties that
1032 * exist in the device tree, but were not set by U-Boot. For example, the
1033 * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
1034 * addresses. Some older U-Boots only initialized 'local-mac-address'. In
1035 * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
1038 const void *of_get_mac_address(struct device_node *np)
1040 struct property *pp;
1042 pp = of_find_property(np, "mac-address", NULL);
1043 if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
1046 pp = of_find_property(np, "local-mac-address", NULL);
1047 if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
1050 pp = of_find_property(np, "address", NULL);
1051 if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
1056 EXPORT_SYMBOL(of_get_mac_address);
1058 int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
1060 int irq = irq_of_parse_and_map(dev, index);
1062 /* Only dereference the resource if both the
1063 * resource and the irq are valid. */
1064 if (r && irq != NO_IRQ) {
1065 r->start = r->end = irq;
1066 r->flags = IORESOURCE_IRQ;
1071 EXPORT_SYMBOL_GPL(of_irq_to_resource);
1073 void __iomem *of_iomap(struct device_node *np, int index)
1075 struct resource res;
1077 if (of_address_to_resource(np, index, &res))
1080 return ioremap(res.start, 1 + res.end - res.start);
1082 EXPORT_SYMBOL(of_iomap);