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>
9 #include <asm/pci-bridge.h>
12 #define DBG(fmt...) do { printk(fmt); } while(0)
14 #define DBG(fmt...) do { } while(0)
23 /* Max address size we deal with */
24 #define OF_MAX_ADDR_CELLS 4
25 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
28 static struct of_bus
*of_match_bus(struct device_node
*np
);
29 static int __of_address_to_resource(struct device_node
*dev
,
30 const u32
*addrp
, u64 size
, unsigned int flags
,
36 static void of_dump_addr(const char *s
, const u32
*addr
, int na
)
40 printk(" %08x", *(addr
++));
44 static void of_dump_addr(const char *s
, const u32
*addr
, int na
) { }
48 /* Callbacks for bus specific translators */
51 const char *addresses
;
52 int (*match
)(struct device_node
*parent
);
53 void (*count_cells
)(struct device_node
*child
,
54 int *addrc
, int *sizec
);
55 u64 (*map
)(u32
*addr
, const u32
*range
,
56 int na
, int ns
, int pna
);
57 int (*translate
)(u32
*addr
, u64 offset
, int na
);
58 unsigned int (*get_flags
)(const u32
*addr
);
63 * Default translator (generic bus)
66 static void of_bus_default_count_cells(struct device_node
*dev
,
67 int *addrc
, int *sizec
)
70 *addrc
= prom_n_addr_cells(dev
);
72 *sizec
= prom_n_size_cells(dev
);
75 static u64
of_bus_default_map(u32
*addr
, const u32
*range
,
76 int na
, int ns
, int pna
)
80 cp
= of_read_number(range
, na
);
81 s
= of_read_number(range
+ na
+ pna
, ns
);
82 da
= of_read_number(addr
, na
);
84 DBG("OF: default map, cp="PRu64
", s="PRu64
", da="PRu64
"\n",
87 if (da
< cp
|| da
>= (cp
+ s
))
92 static int of_bus_default_translate(u32
*addr
, u64 offset
, int na
)
94 u64 a
= of_read_number(addr
, na
);
95 memset(addr
, 0, na
* 4);
98 addr
[na
- 2] = a
>> 32;
99 addr
[na
- 1] = a
& 0xffffffffu
;
104 static unsigned int of_bus_default_get_flags(const u32
*addr
)
106 return IORESOURCE_MEM
;
112 * PCI bus specific translator
115 static int of_bus_pci_match(struct device_node
*np
)
117 /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
118 return !strcmp(np
->type
, "pci") || !strcmp(np
->type
, "vci");
121 static void of_bus_pci_count_cells(struct device_node
*np
,
122 int *addrc
, int *sizec
)
130 static u64
of_bus_pci_map(u32
*addr
, const u32
*range
, int na
, int ns
, int pna
)
134 /* Check address type match */
135 if ((addr
[0] ^ range
[0]) & 0x03000000)
138 /* Read address values, skipping high cell */
139 cp
= of_read_number(range
+ 1, na
- 1);
140 s
= of_read_number(range
+ na
+ pna
, ns
);
141 da
= of_read_number(addr
+ 1, na
- 1);
143 DBG("OF: PCI map, cp="PRu64
", s="PRu64
", da="PRu64
"\n", cp
, s
, da
);
145 if (da
< cp
|| da
>= (cp
+ s
))
150 static int of_bus_pci_translate(u32
*addr
, u64 offset
, int na
)
152 return of_bus_default_translate(addr
+ 1, offset
, na
- 1);
155 static unsigned int of_bus_pci_get_flags(const u32
*addr
)
157 unsigned int flags
= 0;
160 switch((w
>> 24) & 0x03) {
162 flags
|= IORESOURCE_IO
;
163 case 0x02: /* 32 bits */
164 case 0x03: /* 64 bits */
165 flags
|= IORESOURCE_MEM
;
168 flags
|= IORESOURCE_PREFETCH
;
172 const u32
*of_get_pci_address(struct device_node
*dev
, int bar_no
, u64
*size
,
177 struct device_node
*parent
;
179 int onesize
, i
, na
, ns
;
181 /* Get parent & match bus type */
182 parent
= of_get_parent(dev
);
185 bus
= of_match_bus(parent
);
186 if (strcmp(bus
->name
, "pci")) {
190 bus
->count_cells(dev
, &na
, &ns
);
192 if (!OF_CHECK_COUNTS(na
, ns
))
195 /* Get "reg" or "assigned-addresses" property */
196 prop
= get_property(dev
, bus
->addresses
, &psize
);
202 for (i
= 0; psize
>= onesize
; psize
-= onesize
, prop
+= onesize
, i
++)
203 if ((prop
[0] & 0xff) == ((bar_no
* 4) + PCI_BASE_ADDRESS_0
)) {
205 *size
= of_read_number(prop
+ na
, ns
);
207 *flags
= bus
->get_flags(prop
);
212 EXPORT_SYMBOL(of_get_pci_address
);
214 int of_pci_address_to_resource(struct device_node
*dev
, int bar
,
221 addrp
= of_get_pci_address(dev
, bar
, &size
, &flags
);
224 return __of_address_to_resource(dev
, addrp
, size
, flags
, r
);
226 EXPORT_SYMBOL_GPL(of_pci_address_to_resource
);
228 static u8
of_irq_pci_swizzle(u8 slot
, u8 pin
)
230 return (((pin
- 1) + slot
) % 4) + 1;
233 int of_irq_map_pci(struct pci_dev
*pdev
, struct of_irq
*out_irq
)
235 struct device_node
*dn
, *ppnode
;
236 struct pci_dev
*ppdev
;
242 /* Check if we have a device node, if yes, fallback to standard OF
245 dn
= pci_device_to_OF_node(pdev
);
247 return of_irq_map_one(dn
, 0, out_irq
);
249 /* Ok, we don't, time to have fun. Let's start by building up an
250 * interrupt spec. we assume #interrupt-cells is 1, which is standard
251 * for PCI. If you do different, then don't use that routine.
253 rc
= pci_read_config_byte(pdev
, PCI_INTERRUPT_PIN
, &pin
);
260 /* Now we walk up the PCI tree */
263 /* Get the pci_dev of our parent */
264 ppdev
= pdev
->bus
->self
;
266 /* Ouch, it's a host bridge... */
269 ppnode
= pci_bus_to_OF_node(pdev
->bus
);
271 struct pci_controller
*host
;
272 host
= pci_bus_to_host(pdev
->bus
);
273 ppnode
= host
? host
->arch_data
: NULL
;
275 /* No node for host bridge ? give up */
279 /* We found a P2P bridge, check if it has a node */
280 ppnode
= pci_device_to_OF_node(ppdev
);
282 /* Ok, we have found a parent with a device-node, hand over to
283 * the OF parsing code.
284 * We build a unit address from the linux device to be used for
285 * resolution. Note that we use the linux bus number which may
286 * not match your firmware bus numbering.
287 * Fortunately, in most cases, interrupt-map-mask doesn't include
288 * the bus number as part of the matching.
289 * You should still be careful about that though if you intend
290 * to rely on this function (you ship a firmware that doesn't
291 * create device nodes for all PCI devices).
296 /* We can only get here if we hit a P2P bridge with no node,
297 * let's do standard swizzling and try again
299 lspec
= of_irq_pci_swizzle(PCI_SLOT(pdev
->devfn
), lspec
);
303 laddr
[0] = (pdev
->bus
->number
<< 16)
304 | (pdev
->devfn
<< 8);
305 laddr
[1] = laddr
[2] = 0;
306 return of_irq_map_raw(ppnode
, &lspec
, 1, laddr
, out_irq
);
308 EXPORT_SYMBOL_GPL(of_irq_map_pci
);
309 #endif /* CONFIG_PCI */
312 * ISA bus specific translator
315 static int of_bus_isa_match(struct device_node
*np
)
317 return !strcmp(np
->name
, "isa");
320 static void of_bus_isa_count_cells(struct device_node
*child
,
321 int *addrc
, int *sizec
)
329 static u64
of_bus_isa_map(u32
*addr
, const u32
*range
, int na
, int ns
, int pna
)
333 /* Check address type match */
334 if ((addr
[0] ^ range
[0]) & 0x00000001)
337 /* Read address values, skipping high cell */
338 cp
= of_read_number(range
+ 1, na
- 1);
339 s
= of_read_number(range
+ na
+ pna
, ns
);
340 da
= of_read_number(addr
+ 1, na
- 1);
342 DBG("OF: ISA map, cp="PRu64
", s="PRu64
", da="PRu64
"\n", cp
, s
, da
);
344 if (da
< cp
|| da
>= (cp
+ s
))
349 static int of_bus_isa_translate(u32
*addr
, u64 offset
, int na
)
351 return of_bus_default_translate(addr
+ 1, offset
, na
- 1);
354 static unsigned int of_bus_isa_get_flags(const u32
*addr
)
356 unsigned int flags
= 0;
360 flags
|= IORESOURCE_IO
;
362 flags
|= IORESOURCE_MEM
;
368 * Array of bus specific translators
371 static struct of_bus of_busses
[] = {
376 .addresses
= "assigned-addresses",
377 .match
= of_bus_pci_match
,
378 .count_cells
= of_bus_pci_count_cells
,
379 .map
= of_bus_pci_map
,
380 .translate
= of_bus_pci_translate
,
381 .get_flags
= of_bus_pci_get_flags
,
383 #endif /* CONFIG_PCI */
388 .match
= of_bus_isa_match
,
389 .count_cells
= of_bus_isa_count_cells
,
390 .map
= of_bus_isa_map
,
391 .translate
= of_bus_isa_translate
,
392 .get_flags
= of_bus_isa_get_flags
,
399 .count_cells
= of_bus_default_count_cells
,
400 .map
= of_bus_default_map
,
401 .translate
= of_bus_default_translate
,
402 .get_flags
= of_bus_default_get_flags
,
406 static struct of_bus
*of_match_bus(struct device_node
*np
)
410 for (i
= 0; i
< ARRAY_SIZE(of_busses
); i
++)
411 if (!of_busses
[i
].match
|| of_busses
[i
].match(np
))
412 return &of_busses
[i
];
417 static int of_translate_one(struct device_node
*parent
, struct of_bus
*bus
,
418 struct of_bus
*pbus
, u32
*addr
,
419 int na
, int ns
, int pna
)
424 u64 offset
= OF_BAD_ADDR
;
426 /* Normally, an absence of a "ranges" property means we are
427 * crossing a non-translatable boundary, and thus the addresses
428 * below the current not cannot be converted to CPU physical ones.
429 * Unfortunately, while this is very clear in the spec, it's not
430 * what Apple understood, and they do have things like /uni-n or
431 * /ht nodes with no "ranges" property and a lot of perfectly
432 * useable mapped devices below them. Thus we treat the absence of
433 * "ranges" as equivalent to an empty "ranges" property which means
434 * a 1:1 translation at that level. It's up to the caller not to try
435 * to translate addresses that aren't supposed to be translated in
436 * the first place. --BenH.
438 ranges
= get_property(parent
, "ranges", &rlen
);
439 if (ranges
== NULL
|| rlen
== 0) {
440 offset
= of_read_number(addr
, na
);
441 memset(addr
, 0, pna
* 4);
442 DBG("OF: no ranges, 1:1 translation\n");
446 DBG("OF: walking ranges...\n");
448 /* Now walk through the ranges */
450 rone
= na
+ pna
+ ns
;
451 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
452 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
453 if (offset
!= OF_BAD_ADDR
)
456 if (offset
== OF_BAD_ADDR
) {
457 DBG("OF: not found !\n");
460 memcpy(addr
, ranges
+ na
, 4 * pna
);
463 of_dump_addr("OF: parent translation for:", addr
, pna
);
464 DBG("OF: with offset: "PRu64
"\n", offset
);
466 /* Translate it into parent bus space */
467 return pbus
->translate(addr
, offset
, pna
);
472 * Translate an address from the device-tree into a CPU physical address,
473 * this walks up the tree and applies the various bus mappings on the
476 * Note: We consider that crossing any level with #size-cells == 0 to mean
477 * that translation is impossible (that is we are not dealing with a value
478 * that can be mapped to a cpu physical address). This is not really specified
479 * that way, but this is traditionally the way IBM at least do things
481 u64
of_translate_address(struct device_node
*dev
, const u32
*in_addr
)
483 struct device_node
*parent
= NULL
;
484 struct of_bus
*bus
, *pbus
;
485 u32 addr
[OF_MAX_ADDR_CELLS
];
486 int na
, ns
, pna
, pns
;
487 u64 result
= OF_BAD_ADDR
;
489 DBG("OF: ** translation for device %s **\n", dev
->full_name
);
491 /* Increase refcount at current level */
494 /* Get parent & match bus type */
495 parent
= of_get_parent(dev
);
498 bus
= of_match_bus(parent
);
500 /* Cound address cells & copy address locally */
501 bus
->count_cells(dev
, &na
, &ns
);
502 if (!OF_CHECK_COUNTS(na
, ns
)) {
503 printk(KERN_ERR
"prom_parse: Bad cell count for %s\n",
507 memcpy(addr
, in_addr
, na
* 4);
509 DBG("OF: bus is %s (na=%d, ns=%d) on %s\n",
510 bus
->name
, na
, ns
, parent
->full_name
);
511 of_dump_addr("OF: translating address:", addr
, na
);
515 /* Switch to parent bus */
518 parent
= of_get_parent(dev
);
520 /* If root, we have finished */
521 if (parent
== NULL
) {
522 DBG("OF: reached root node\n");
523 result
= of_read_number(addr
, na
);
527 /* Get new parent bus and counts */
528 pbus
= of_match_bus(parent
);
529 pbus
->count_cells(dev
, &pna
, &pns
);
530 if (!OF_CHECK_COUNTS(pna
, pns
)) {
531 printk(KERN_ERR
"prom_parse: Bad cell count for %s\n",
536 DBG("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
537 pbus
->name
, pna
, pns
, parent
->full_name
);
539 /* Apply bus translation */
540 if (of_translate_one(dev
, bus
, pbus
, addr
, na
, ns
, pna
))
543 /* Complete the move up one level */
548 of_dump_addr("OF: one level translation:", addr
, na
);
556 EXPORT_SYMBOL(of_translate_address
);
558 const u32
*of_get_address(struct device_node
*dev
, int index
, u64
*size
,
563 struct device_node
*parent
;
565 int onesize
, i
, na
, ns
;
567 /* Get parent & match bus type */
568 parent
= of_get_parent(dev
);
571 bus
= of_match_bus(parent
);
572 bus
->count_cells(dev
, &na
, &ns
);
574 if (!OF_CHECK_COUNTS(na
, ns
))
577 /* Get "reg" or "assigned-addresses" property */
578 prop
= get_property(dev
, bus
->addresses
, &psize
);
584 for (i
= 0; psize
>= onesize
; psize
-= onesize
, prop
+= onesize
, i
++)
587 *size
= of_read_number(prop
+ na
, ns
);
589 *flags
= bus
->get_flags(prop
);
594 EXPORT_SYMBOL(of_get_address
);
596 static int __of_address_to_resource(struct device_node
*dev
, const u32
*addrp
,
597 u64 size
, unsigned int flags
,
602 if ((flags
& (IORESOURCE_IO
| IORESOURCE_MEM
)) == 0)
604 taddr
= of_translate_address(dev
, addrp
);
605 if (taddr
== OF_BAD_ADDR
)
607 memset(r
, 0, sizeof(struct resource
));
608 if (flags
& IORESOURCE_IO
) {
610 port
= pci_address_to_pio(taddr
);
611 if (port
== (unsigned long)-1)
614 r
->end
= port
+ size
- 1;
617 r
->end
= taddr
+ size
- 1;
624 int of_address_to_resource(struct device_node
*dev
, int index
,
631 addrp
= of_get_address(dev
, index
, &size
, &flags
);
634 return __of_address_to_resource(dev
, addrp
, size
, flags
, r
);
636 EXPORT_SYMBOL_GPL(of_address_to_resource
);
638 void of_parse_dma_window(struct device_node
*dn
, const void *dma_window_prop
,
639 unsigned long *busno
, unsigned long *phys
, unsigned long *size
)
641 const u32
*dma_window
;
643 const unsigned char *prop
;
645 dma_window
= dma_window_prop
;
647 /* busno is always one cell */
648 *busno
= *(dma_window
++);
650 prop
= get_property(dn
, "ibm,#dma-address-cells", NULL
);
652 prop
= get_property(dn
, "#address-cells", NULL
);
654 cells
= prop
? *(u32
*)prop
: prom_n_addr_cells(dn
);
655 *phys
= of_read_number(dma_window
, cells
);
659 prop
= get_property(dn
, "ibm,#dma-size-cells", NULL
);
660 cells
= prop
? *(u32
*)prop
: prom_n_size_cells(dn
);
661 *size
= of_read_number(dma_window
, cells
);
668 static unsigned int of_irq_workarounds
;
669 static struct device_node
*of_irq_dflt_pic
;
671 static struct device_node
*of_irq_find_parent(struct device_node
*child
)
673 struct device_node
*p
;
676 if (!of_node_get(child
))
680 parp
= get_property(child
, "interrupt-parent", NULL
);
682 p
= of_get_parent(child
);
684 if (of_irq_workarounds
& OF_IMAP_NO_PHANDLE
)
685 p
= of_node_get(of_irq_dflt_pic
);
687 p
= of_find_node_by_phandle(*parp
);
691 } while (p
&& get_property(p
, "#interrupt-cells", NULL
) == NULL
);
696 /* This doesn't need to be called if you don't have any special workaround
699 void of_irq_map_init(unsigned int flags
)
701 of_irq_workarounds
= flags
;
703 /* OldWorld, don't bother looking at other things */
704 if (flags
& OF_IMAP_OLDWORLD_MAC
)
707 /* If we don't have phandles, let's try to locate a default interrupt
708 * controller (happens when booting with BootX). We do a first match
709 * here, hopefully, that only ever happens on machines with one
712 if (flags
& OF_IMAP_NO_PHANDLE
) {
713 struct device_node
*np
;
715 for(np
= NULL
; (np
= of_find_all_nodes(np
)) != NULL
;) {
716 if (get_property(np
, "interrupt-controller", NULL
)
719 /* Skip /chosen/interrupt-controller */
720 if (strcmp(np
->name
, "chosen") == 0)
722 /* It seems like at least one person on this planet wants
723 * to use BootX on a machine with an AppleKiwi controller
724 * which happens to pretend to be an interrupt
727 if (strcmp(np
->name
, "AppleKiwi") == 0)
729 /* I think we found one ! */
730 of_irq_dflt_pic
= np
;
737 int of_irq_map_raw(struct device_node
*parent
, const u32
*intspec
, u32 ointsize
,
738 const u32
*addr
, struct of_irq
*out_irq
)
740 struct device_node
*ipar
, *tnode
, *old
= NULL
, *newpar
= NULL
;
741 const u32
*tmp
, *imap
, *imask
;
742 u32 intsize
= 1, addrsize
, newintsize
= 0, newaddrsize
= 0;
743 int imaplen
, match
, i
;
745 DBG("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],ointsize=%d\n",
746 parent
->full_name
, intspec
[0], intspec
[1], ointsize
);
748 ipar
= of_node_get(parent
);
750 /* First get the #interrupt-cells property of the current cursor
751 * that tells us how to interpret the passed-in intspec. If there
752 * is none, we are nice and just walk up the tree
755 tmp
= get_property(ipar
, "#interrupt-cells", NULL
);
761 ipar
= of_irq_find_parent(ipar
);
765 DBG(" -> no parent found !\n");
769 DBG("of_irq_map_raw: ipar=%s, size=%d\n", ipar
->full_name
, intsize
);
771 if (ointsize
!= intsize
)
774 /* Look for this #address-cells. We have to implement the old linux
775 * trick of looking for the parent here as some device-trees rely on it
777 old
= of_node_get(ipar
);
779 tmp
= get_property(old
, "#address-cells", NULL
);
780 tnode
= of_get_parent(old
);
783 } while(old
&& tmp
== NULL
);
786 addrsize
= (tmp
== NULL
) ? 2 : *tmp
;
788 DBG(" -> addrsize=%d\n", addrsize
);
790 /* Now start the actual "proper" walk of the interrupt tree */
791 while (ipar
!= NULL
) {
792 /* Now check if cursor is an interrupt-controller and if it is
795 if (get_property(ipar
, "interrupt-controller", NULL
) != NULL
) {
796 DBG(" -> got it !\n");
797 memcpy(out_irq
->specifier
, intspec
,
798 intsize
* sizeof(u32
));
799 out_irq
->size
= intsize
;
800 out_irq
->controller
= ipar
;
805 /* Now look for an interrupt-map */
806 imap
= get_property(ipar
, "interrupt-map", &imaplen
);
807 /* No interrupt map, check for an interrupt parent */
809 DBG(" -> no map, getting parent\n");
810 newpar
= of_irq_find_parent(ipar
);
813 imaplen
/= sizeof(u32
);
815 /* Look for a mask */
816 imask
= get_property(ipar
, "interrupt-map-mask", NULL
);
818 /* If we were passed no "reg" property and we attempt to parse
819 * an interrupt-map, then #address-cells must be 0.
822 if (addr
== NULL
&& addrsize
!= 0) {
823 DBG(" -> no reg passed in when needed !\n");
827 /* Parse interrupt-map */
829 while (imaplen
> (addrsize
+ intsize
+ 1) && !match
) {
830 /* Compare specifiers */
832 for (i
= 0; i
< addrsize
&& match
; ++i
) {
833 u32 mask
= imask
? imask
[i
] : 0xffffffffu
;
834 match
= ((addr
[i
] ^ imap
[i
]) & mask
) == 0;
836 for (; i
< (addrsize
+ intsize
) && match
; ++i
) {
837 u32 mask
= imask
? imask
[i
] : 0xffffffffu
;
839 ((intspec
[i
-addrsize
] ^ imap
[i
]) & mask
) == 0;
841 imap
+= addrsize
+ intsize
;
842 imaplen
-= addrsize
+ intsize
;
844 DBG(" -> match=%d (imaplen=%d)\n", match
, imaplen
);
846 /* Get the interrupt parent */
847 if (of_irq_workarounds
& OF_IMAP_NO_PHANDLE
)
848 newpar
= of_node_get(of_irq_dflt_pic
);
850 newpar
= of_find_node_by_phandle((phandle
)*imap
);
854 /* Check if not found */
855 if (newpar
== NULL
) {
856 DBG(" -> imap parent not found !\n");
860 /* Get #interrupt-cells and #address-cells of new
863 tmp
= get_property(newpar
, "#interrupt-cells",
866 DBG(" -> parent lacks #interrupt-cells !\n");
870 tmp
= get_property(newpar
, "#address-cells",
872 newaddrsize
= (tmp
== NULL
) ? 0 : *tmp
;
874 DBG(" -> newintsize=%d, newaddrsize=%d\n",
875 newintsize
, newaddrsize
);
877 /* Check for malformed properties */
878 if (imaplen
< (newaddrsize
+ newintsize
))
881 imap
+= newaddrsize
+ newintsize
;
882 imaplen
-= newaddrsize
+ newintsize
;
884 DBG(" -> imaplen=%d\n", imaplen
);
890 old
= of_node_get(newpar
);
891 addrsize
= newaddrsize
;
892 intsize
= newintsize
;
893 intspec
= imap
- intsize
;
894 addr
= intspec
- addrsize
;
897 /* Iterate again with new parent */
898 DBG(" -> new parent: %s\n", newpar
? newpar
->full_name
: "<>");
910 EXPORT_SYMBOL_GPL(of_irq_map_raw
);
912 #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
913 static int of_irq_map_oldworld(struct device_node
*device
, int index
,
914 struct of_irq
*out_irq
)
920 * Old machines just have a list of interrupt numbers
921 * and no interrupt-controller nodes.
923 ints
= get_property(device
, "AAPL,interrupts", &intlen
);
926 intlen
/= sizeof(u32
);
931 out_irq
->controller
= NULL
;
932 out_irq
->specifier
[0] = ints
[index
];
937 #else /* defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) */
938 static int of_irq_map_oldworld(struct device_node
*device
, int index
,
939 struct of_irq
*out_irq
)
943 #endif /* !(defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)) */
945 int of_irq_map_one(struct device_node
*device
, int index
, struct of_irq
*out_irq
)
947 struct device_node
*p
;
948 const u32
*intspec
, *tmp
, *addr
;
952 DBG("of_irq_map_one: dev=%s, index=%d\n", device
->full_name
, index
);
954 /* OldWorld mac stuff is "special", handle out of line */
955 if (of_irq_workarounds
& OF_IMAP_OLDWORLD_MAC
)
956 return of_irq_map_oldworld(device
, index
, out_irq
);
958 /* Get the interrupts property */
959 intspec
= get_property(device
, "interrupts", &intlen
);
962 intlen
/= sizeof(u32
);
964 /* Get the reg property (if any) */
965 addr
= get_property(device
, "reg", NULL
);
967 /* Look for the interrupt parent. */
968 p
= of_irq_find_parent(device
);
972 /* Get size of interrupt specifier */
973 tmp
= get_property(p
, "#interrupt-cells", NULL
);
980 DBG(" intsize=%d intlen=%d\n", intsize
, intlen
);
983 if ((index
+ 1) * intsize
> intlen
)
986 /* Get new specifier and map it */
987 res
= of_irq_map_raw(p
, intspec
+ index
* intsize
, intsize
,
992 EXPORT_SYMBOL_GPL(of_irq_map_one
);