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 && \
30 static void of_dump_addr(const char *s
, u32
*addr
, int na
)
34 printk(" %08x", *(addr
++));
38 static void of_dump_addr(const char *s
, u32
*addr
, int na
) { }
42 /* Callbacks for bus specific translators */
45 const char *addresses
;
46 int (*match
)(struct device_node
*parent
);
47 void (*count_cells
)(struct device_node
*child
,
48 int *addrc
, int *sizec
);
49 u64 (*map
)(u32
*addr
, u32
*range
, int na
, int ns
, int pna
);
50 int (*translate
)(u32
*addr
, u64 offset
, int na
);
51 unsigned int (*get_flags
)(u32
*addr
);
56 * Default translator (generic bus)
59 static void of_bus_default_count_cells(struct device_node
*dev
,
60 int *addrc
, int *sizec
)
63 *addrc
= prom_n_addr_cells(dev
);
65 *sizec
= prom_n_size_cells(dev
);
68 static u64
of_bus_default_map(u32
*addr
, u32
*range
, int na
, int ns
, int pna
)
72 cp
= of_read_number(range
, na
);
73 s
= of_read_number(range
+ na
+ pna
, ns
);
74 da
= of_read_number(addr
, na
);
76 DBG("OF: default map, cp="PRu64
", s="PRu64
", da="PRu64
"\n",
79 if (da
< cp
|| da
>= (cp
+ s
))
84 static int of_bus_default_translate(u32
*addr
, u64 offset
, int na
)
86 u64 a
= of_read_number(addr
, na
);
87 memset(addr
, 0, na
* 4);
90 addr
[na
- 2] = a
>> 32;
91 addr
[na
- 1] = a
& 0xffffffffu
;
96 static unsigned int of_bus_default_get_flags(u32
*addr
)
98 return IORESOURCE_MEM
;
103 * PCI bus specific translator
106 static int of_bus_pci_match(struct device_node
*np
)
108 /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
109 return !strcmp(np
->type
, "pci") || !strcmp(np
->type
, "vci");
112 static void of_bus_pci_count_cells(struct device_node
*np
,
113 int *addrc
, int *sizec
)
121 static u64
of_bus_pci_map(u32
*addr
, u32
*range
, int na
, int ns
, int pna
)
125 /* Check address type match */
126 if ((addr
[0] ^ range
[0]) & 0x03000000)
129 /* Read address values, skipping high cell */
130 cp
= of_read_number(range
+ 1, na
- 1);
131 s
= of_read_number(range
+ na
+ pna
, ns
);
132 da
= of_read_number(addr
+ 1, na
- 1);
134 DBG("OF: PCI map, cp="PRu64
", s="PRu64
", da="PRu64
"\n", cp
, s
, da
);
136 if (da
< cp
|| da
>= (cp
+ s
))
141 static int of_bus_pci_translate(u32
*addr
, u64 offset
, int na
)
143 return of_bus_default_translate(addr
+ 1, offset
, na
- 1);
146 static unsigned int of_bus_pci_get_flags(u32
*addr
)
148 unsigned int flags
= 0;
151 switch((w
>> 24) & 0x03) {
153 flags
|= IORESOURCE_IO
;
154 case 0x02: /* 32 bits */
155 case 0x03: /* 64 bits */
156 flags
|= IORESOURCE_MEM
;
159 flags
|= IORESOURCE_PREFETCH
;
164 * ISA bus specific translator
167 static int of_bus_isa_match(struct device_node
*np
)
169 return !strcmp(np
->name
, "isa");
172 static void of_bus_isa_count_cells(struct device_node
*child
,
173 int *addrc
, int *sizec
)
181 static u64
of_bus_isa_map(u32
*addr
, u32
*range
, int na
, int ns
, int pna
)
185 /* Check address type match */
186 if ((addr
[0] ^ range
[0]) & 0x00000001)
189 /* Read address values, skipping high cell */
190 cp
= of_read_number(range
+ 1, na
- 1);
191 s
= of_read_number(range
+ na
+ pna
, ns
);
192 da
= of_read_number(addr
+ 1, na
- 1);
194 DBG("OF: ISA map, cp="PRu64
", s="PRu64
", da="PRu64
"\n", cp
, s
, da
);
196 if (da
< cp
|| da
>= (cp
+ s
))
201 static int of_bus_isa_translate(u32
*addr
, u64 offset
, int na
)
203 return of_bus_default_translate(addr
+ 1, offset
, na
- 1);
206 static unsigned int of_bus_isa_get_flags(u32
*addr
)
208 unsigned int flags
= 0;
212 flags
|= IORESOURCE_IO
;
214 flags
|= IORESOURCE_MEM
;
220 * Array of bus specific translators
223 static struct of_bus of_busses
[] = {
227 .addresses
= "assigned-addresses",
228 .match
= of_bus_pci_match
,
229 .count_cells
= of_bus_pci_count_cells
,
230 .map
= of_bus_pci_map
,
231 .translate
= of_bus_pci_translate
,
232 .get_flags
= of_bus_pci_get_flags
,
238 .match
= of_bus_isa_match
,
239 .count_cells
= of_bus_isa_count_cells
,
240 .map
= of_bus_isa_map
,
241 .translate
= of_bus_isa_translate
,
242 .get_flags
= of_bus_isa_get_flags
,
249 .count_cells
= of_bus_default_count_cells
,
250 .map
= of_bus_default_map
,
251 .translate
= of_bus_default_translate
,
252 .get_flags
= of_bus_default_get_flags
,
256 static struct of_bus
*of_match_bus(struct device_node
*np
)
260 for (i
= 0; i
< ARRAY_SIZE(of_busses
); i
++)
261 if (!of_busses
[i
].match
|| of_busses
[i
].match(np
))
262 return &of_busses
[i
];
267 static int of_translate_one(struct device_node
*parent
, struct of_bus
*bus
,
268 struct of_bus
*pbus
, u32
*addr
,
269 int na
, int ns
, int pna
)
274 u64 offset
= OF_BAD_ADDR
;
276 /* Normally, an absence of a "ranges" property means we are
277 * crossing a non-translatable boundary, and thus the addresses
278 * below the current not cannot be converted to CPU physical ones.
279 * Unfortunately, while this is very clear in the spec, it's not
280 * what Apple understood, and they do have things like /uni-n or
281 * /ht nodes with no "ranges" property and a lot of perfectly
282 * useable mapped devices below them. Thus we treat the absence of
283 * "ranges" as equivalent to an empty "ranges" property which means
284 * a 1:1 translation at that level. It's up to the caller not to try
285 * to translate addresses that aren't supposed to be translated in
286 * the first place. --BenH.
288 ranges
= (u32
*)get_property(parent
, "ranges", &rlen
);
289 if (ranges
== NULL
|| rlen
== 0) {
290 offset
= of_read_number(addr
, na
);
291 memset(addr
, 0, pna
* 4);
292 DBG("OF: no ranges, 1:1 translation\n");
296 DBG("OF: walking ranges...\n");
298 /* Now walk through the ranges */
300 rone
= na
+ pna
+ ns
;
301 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
302 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
303 if (offset
!= OF_BAD_ADDR
)
306 if (offset
== OF_BAD_ADDR
) {
307 DBG("OF: not found !\n");
310 memcpy(addr
, ranges
+ na
, 4 * pna
);
313 of_dump_addr("OF: parent translation for:", addr
, pna
);
314 DBG("OF: with offset: "PRu64
"\n", offset
);
316 /* Translate it into parent bus space */
317 return pbus
->translate(addr
, offset
, pna
);
322 * Translate an address from the device-tree into a CPU physical address,
323 * this walks up the tree and applies the various bus mappings on the
326 * Note: We consider that crossing any level with #size-cells == 0 to mean
327 * that translation is impossible (that is we are not dealing with a value
328 * that can be mapped to a cpu physical address). This is not really specified
329 * that way, but this is traditionally the way IBM at least do things
331 u64
of_translate_address(struct device_node
*dev
, u32
*in_addr
)
333 struct device_node
*parent
= NULL
;
334 struct of_bus
*bus
, *pbus
;
335 u32 addr
[OF_MAX_ADDR_CELLS
];
336 int na
, ns
, pna
, pns
;
337 u64 result
= OF_BAD_ADDR
;
339 DBG("OF: ** translation for device %s **\n", dev
->full_name
);
341 /* Increase refcount at current level */
344 /* Get parent & match bus type */
345 parent
= of_get_parent(dev
);
348 bus
= of_match_bus(parent
);
350 /* Cound address cells & copy address locally */
351 bus
->count_cells(dev
, &na
, &ns
);
352 if (!OF_CHECK_COUNTS(na
, ns
)) {
353 printk(KERN_ERR
"prom_parse: Bad cell count for %s\n",
357 memcpy(addr
, in_addr
, na
* 4);
359 DBG("OF: bus is %s (na=%d, ns=%d) on %s\n",
360 bus
->name
, na
, ns
, parent
->full_name
);
361 of_dump_addr("OF: translating address:", addr
, na
);
365 /* Switch to parent bus */
368 parent
= of_get_parent(dev
);
370 /* If root, we have finished */
371 if (parent
== NULL
) {
372 DBG("OF: reached root node\n");
373 result
= of_read_number(addr
, na
);
377 /* Get new parent bus and counts */
378 pbus
= of_match_bus(parent
);
379 pbus
->count_cells(dev
, &pna
, &pns
);
380 if (!OF_CHECK_COUNTS(pna
, pns
)) {
381 printk(KERN_ERR
"prom_parse: Bad cell count for %s\n",
386 DBG("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
387 pbus
->name
, pna
, pns
, parent
->full_name
);
389 /* Apply bus translation */
390 if (of_translate_one(dev
, bus
, pbus
, addr
, na
, ns
, pna
))
393 /* Complete the move up one level */
398 of_dump_addr("OF: one level translation:", addr
, na
);
406 EXPORT_SYMBOL(of_translate_address
);
408 u32
*of_get_address(struct device_node
*dev
, int index
, u64
*size
,
413 struct device_node
*parent
;
415 int onesize
, i
, na
, ns
;
417 /* Get parent & match bus type */
418 parent
= of_get_parent(dev
);
421 bus
= of_match_bus(parent
);
422 bus
->count_cells(dev
, &na
, &ns
);
424 if (!OF_CHECK_COUNTS(na
, ns
))
427 /* Get "reg" or "assigned-addresses" property */
428 prop
= (u32
*)get_property(dev
, bus
->addresses
, &psize
);
434 for (i
= 0; psize
>= onesize
; psize
-= onesize
, prop
+= onesize
, i
++)
437 *size
= of_read_number(prop
+ na
, ns
);
439 *flags
= bus
->get_flags(prop
);
444 EXPORT_SYMBOL(of_get_address
);
446 u32
*of_get_pci_address(struct device_node
*dev
, int bar_no
, u64
*size
,
451 struct device_node
*parent
;
453 int onesize
, i
, na
, ns
;
455 /* Get parent & match bus type */
456 parent
= of_get_parent(dev
);
459 bus
= of_match_bus(parent
);
460 if (strcmp(bus
->name
, "pci")) {
464 bus
->count_cells(dev
, &na
, &ns
);
466 if (!OF_CHECK_COUNTS(na
, ns
))
469 /* Get "reg" or "assigned-addresses" property */
470 prop
= (u32
*)get_property(dev
, bus
->addresses
, &psize
);
476 for (i
= 0; psize
>= onesize
; psize
-= onesize
, prop
+= onesize
, i
++)
477 if ((prop
[0] & 0xff) == ((bar_no
* 4) + PCI_BASE_ADDRESS_0
)) {
479 *size
= of_read_number(prop
+ na
, ns
);
481 *flags
= bus
->get_flags(prop
);
486 EXPORT_SYMBOL(of_get_pci_address
);
488 static int __of_address_to_resource(struct device_node
*dev
, u32
*addrp
,
489 u64 size
, unsigned int flags
,
494 if ((flags
& (IORESOURCE_IO
| IORESOURCE_MEM
)) == 0)
496 taddr
= of_translate_address(dev
, addrp
);
497 if (taddr
== OF_BAD_ADDR
)
499 memset(r
, 0, sizeof(struct resource
));
500 if (flags
& IORESOURCE_IO
) {
502 port
= pci_address_to_pio(taddr
);
503 if (port
== (unsigned long)-1)
506 r
->end
= port
+ size
- 1;
509 r
->end
= taddr
+ size
- 1;
516 int of_address_to_resource(struct device_node
*dev
, int index
,
523 addrp
= of_get_address(dev
, index
, &size
, &flags
);
526 return __of_address_to_resource(dev
, addrp
, size
, flags
, r
);
528 EXPORT_SYMBOL_GPL(of_address_to_resource
);
530 int of_pci_address_to_resource(struct device_node
*dev
, int bar
,
537 addrp
= of_get_pci_address(dev
, bar
, &size
, &flags
);
540 return __of_address_to_resource(dev
, addrp
, size
, flags
, r
);
542 EXPORT_SYMBOL_GPL(of_pci_address_to_resource
);
544 void of_parse_dma_window(struct device_node
*dn
, unsigned char *dma_window_prop
,
545 unsigned long *busno
, unsigned long *phys
, unsigned long *size
)
547 u32
*dma_window
, cells
;
550 dma_window
= (u32
*)dma_window_prop
;
552 /* busno is always one cell */
553 *busno
= *(dma_window
++);
555 prop
= get_property(dn
, "ibm,#dma-address-cells", NULL
);
557 prop
= get_property(dn
, "#address-cells", NULL
);
559 cells
= prop
? *(u32
*)prop
: prom_n_addr_cells(dn
);
560 *phys
= of_read_number(dma_window
, cells
);
564 prop
= get_property(dn
, "ibm,#dma-size-cells", NULL
);
565 cells
= prop
? *(u32
*)prop
: prom_n_size_cells(dn
);
566 *size
= of_read_number(dma_window
, cells
);
573 static unsigned int of_irq_workarounds
;
574 static struct device_node
*of_irq_dflt_pic
;
576 static struct device_node
*of_irq_find_parent(struct device_node
*child
)
578 struct device_node
*p
;
581 if (!of_node_get(child
))
585 parp
= (phandle
*)get_property(child
, "interrupt-parent", NULL
);
587 p
= of_get_parent(child
);
589 if (of_irq_workarounds
& OF_IMAP_NO_PHANDLE
)
590 p
= of_node_get(of_irq_dflt_pic
);
592 p
= of_find_node_by_phandle(*parp
);
596 } while (p
&& get_property(p
, "#interrupt-cells", NULL
) == NULL
);
601 /* This doesn't need to be called if you don't have any special workaround
604 void of_irq_map_init(unsigned int flags
)
606 of_irq_workarounds
= flags
;
608 /* OldWorld, don't bother looking at other things */
609 if (flags
& OF_IMAP_OLDWORLD_MAC
)
612 /* If we don't have phandles, let's try to locate a default interrupt
613 * controller (happens when booting with BootX). We do a first match
614 * here, hopefully, that only ever happens on machines with one
617 if (flags
& OF_IMAP_NO_PHANDLE
) {
618 struct device_node
*np
;
620 for(np
= NULL
; (np
= of_find_all_nodes(np
)) != NULL
;) {
621 if (get_property(np
, "interrupt-controller", NULL
)
624 /* Skip /chosen/interrupt-controller */
625 if (strcmp(np
->name
, "chosen") == 0)
627 /* It seems like at least one person on this planet wants
628 * to use BootX on a machine with an AppleKiwi controller
629 * which happens to pretend to be an interrupt
632 if (strcmp(np
->name
, "AppleKiwi") == 0)
634 /* I think we found one ! */
635 of_irq_dflt_pic
= np
;
642 int of_irq_map_raw(struct device_node
*parent
, u32
*intspec
, u32 ointsize
,
643 u32
*addr
, struct of_irq
*out_irq
)
645 struct device_node
*ipar
, *tnode
, *old
= NULL
, *newpar
= NULL
;
646 u32
*tmp
, *imap
, *imask
;
647 u32 intsize
= 1, addrsize
, newintsize
= 0, newaddrsize
= 0;
648 int imaplen
, match
, i
;
650 DBG("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],ointsize=%d\n",
651 parent
->full_name
, intspec
[0], intspec
[1], ointsize
);
653 ipar
= of_node_get(parent
);
655 /* First get the #interrupt-cells property of the current cursor
656 * that tells us how to interpret the passed-in intspec. If there
657 * is none, we are nice and just walk up the tree
660 tmp
= (u32
*)get_property(ipar
, "#interrupt-cells", NULL
);
666 ipar
= of_irq_find_parent(ipar
);
670 DBG(" -> no parent found !\n");
674 DBG("of_irq_map_raw: ipar=%s, size=%d\n", ipar
->full_name
, intsize
);
676 if (ointsize
!= intsize
)
679 /* Look for this #address-cells. We have to implement the old linux
680 * trick of looking for the parent here as some device-trees rely on it
682 old
= of_node_get(ipar
);
684 tmp
= (u32
*)get_property(old
, "#address-cells", NULL
);
685 tnode
= of_get_parent(old
);
688 } while(old
&& tmp
== NULL
);
691 addrsize
= (tmp
== NULL
) ? 2 : *tmp
;
693 DBG(" -> addrsize=%d\n", addrsize
);
695 /* Now start the actual "proper" walk of the interrupt tree */
696 while (ipar
!= NULL
) {
697 /* Now check if cursor is an interrupt-controller and if it is
700 if (get_property(ipar
, "interrupt-controller", NULL
) != NULL
) {
701 DBG(" -> got it !\n");
702 memcpy(out_irq
->specifier
, intspec
,
703 intsize
* sizeof(u32
));
704 out_irq
->size
= intsize
;
705 out_irq
->controller
= ipar
;
710 /* Now look for an interrupt-map */
711 imap
= (u32
*)get_property(ipar
, "interrupt-map", &imaplen
);
712 /* No interrupt map, check for an interrupt parent */
714 DBG(" -> no map, getting parent\n");
715 newpar
= of_irq_find_parent(ipar
);
718 imaplen
/= sizeof(u32
);
720 /* Look for a mask */
721 imask
= (u32
*)get_property(ipar
, "interrupt-map-mask", NULL
);
723 /* If we were passed no "reg" property and we attempt to parse
724 * an interrupt-map, then #address-cells must be 0.
727 if (addr
== NULL
&& addrsize
!= 0) {
728 DBG(" -> no reg passed in when needed !\n");
732 /* Parse interrupt-map */
734 while (imaplen
> (addrsize
+ intsize
+ 1) && !match
) {
735 /* Compare specifiers */
737 for (i
= 0; i
< addrsize
&& match
; ++i
) {
738 u32 mask
= imask
? imask
[i
] : 0xffffffffu
;
739 match
= ((addr
[i
] ^ imap
[i
]) & mask
) == 0;
741 for (; i
< (addrsize
+ intsize
) && match
; ++i
) {
742 u32 mask
= imask
? imask
[i
] : 0xffffffffu
;
744 ((intspec
[i
-addrsize
] ^ imap
[i
]) & mask
) == 0;
746 imap
+= addrsize
+ intsize
;
747 imaplen
-= addrsize
+ intsize
;
749 DBG(" -> match=%d (imaplen=%d)\n", match
, imaplen
);
751 /* Get the interrupt parent */
752 if (of_irq_workarounds
& OF_IMAP_NO_PHANDLE
)
753 newpar
= of_node_get(of_irq_dflt_pic
);
755 newpar
= of_find_node_by_phandle((phandle
)*imap
);
759 /* Check if not found */
760 if (newpar
== NULL
) {
761 DBG(" -> imap parent not found !\n");
765 /* Get #interrupt-cells and #address-cells of new
768 tmp
= (u32
*)get_property(newpar
, "#interrupt-cells",
771 DBG(" -> parent lacks #interrupt-cells !\n");
775 tmp
= (u32
*)get_property(newpar
, "#address-cells",
777 newaddrsize
= (tmp
== NULL
) ? 0 : *tmp
;
779 DBG(" -> newintsize=%d, newaddrsize=%d\n",
780 newintsize
, newaddrsize
);
782 /* Check for malformed properties */
783 if (imaplen
< (newaddrsize
+ newintsize
))
786 imap
+= newaddrsize
+ newintsize
;
787 imaplen
-= newaddrsize
+ newintsize
;
789 DBG(" -> imaplen=%d\n", imaplen
);
795 old
= of_node_get(newpar
);
796 addrsize
= newaddrsize
;
797 intsize
= newintsize
;
798 intspec
= imap
- intsize
;
799 addr
= intspec
- addrsize
;
802 /* Iterate again with new parent */
803 DBG(" -> new parent: %s\n", newpar
? newpar
->full_name
: "<>");
815 EXPORT_SYMBOL_GPL(of_irq_map_raw
);
817 #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
818 static int of_irq_map_oldworld(struct device_node
*device
, int index
,
819 struct of_irq
*out_irq
)
825 * Old machines just have a list of interrupt numbers
826 * and no interrupt-controller nodes.
828 ints
= (u32
*) get_property(device
, "AAPL,interrupts", &intlen
);
831 intlen
/= sizeof(u32
);
836 out_irq
->controller
= NULL
;
837 out_irq
->specifier
[0] = ints
[index
];
842 #else /* defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) */
843 static int of_irq_map_oldworld(struct device_node
*device
, int index
,
844 struct of_irq
*out_irq
)
848 #endif /* !(defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)) */
850 int of_irq_map_one(struct device_node
*device
, int index
, struct of_irq
*out_irq
)
852 struct device_node
*p
;
853 u32
*intspec
, *tmp
, intsize
, intlen
, *addr
;
856 DBG("of_irq_map_one: dev=%s, index=%d\n", device
->full_name
, index
);
858 /* OldWorld mac stuff is "special", handle out of line */
859 if (of_irq_workarounds
& OF_IMAP_OLDWORLD_MAC
)
860 return of_irq_map_oldworld(device
, index
, out_irq
);
862 /* Get the interrupts property */
863 intspec
= (u32
*)get_property(device
, "interrupts", &intlen
);
866 intlen
/= sizeof(u32
);
868 /* Get the reg property (if any) */
869 addr
= (u32
*)get_property(device
, "reg", NULL
);
871 /* Look for the interrupt parent. */
872 p
= of_irq_find_parent(device
);
876 /* Get size of interrupt specifier */
877 tmp
= (u32
*)get_property(p
, "#interrupt-cells", NULL
);
884 DBG(" intsize=%d intlen=%d\n", intsize
, intlen
);
887 if ((index
+ 1) * intsize
> intlen
)
890 /* Get new specifier and map it */
891 res
= of_irq_map_raw(p
, intspec
+ index
* intsize
, intsize
,
896 EXPORT_SYMBOL_GPL(of_irq_map_one
);
899 static u8
of_irq_pci_swizzle(u8 slot
, u8 pin
)
901 return (((pin
- 1) + slot
) % 4) + 1;
904 int of_irq_map_pci(struct pci_dev
*pdev
, struct of_irq
*out_irq
)
906 struct device_node
*dn
, *ppnode
;
907 struct pci_dev
*ppdev
;
913 /* Check if we have a device node, if yes, fallback to standard OF
916 dn
= pci_device_to_OF_node(pdev
);
918 return of_irq_map_one(dn
, 0, out_irq
);
920 /* Ok, we don't, time to have fun. Let's start by building up an
921 * interrupt spec. we assume #interrupt-cells is 1, which is standard
922 * for PCI. If you do different, then don't use that routine.
924 rc
= pci_read_config_byte(pdev
, PCI_INTERRUPT_PIN
, &pin
);
931 /* Now we walk up the PCI tree */
934 /* Get the pci_dev of our parent */
935 ppdev
= pdev
->bus
->self
;
937 /* Ouch, it's a host bridge... */
940 ppnode
= pci_bus_to_OF_node(pdev
->bus
);
942 struct pci_controller
*host
;
943 host
= pci_bus_to_host(pdev
->bus
);
944 ppnode
= host
? host
->arch_data
: NULL
;
946 /* No node for host bridge ? give up */
950 /* We found a P2P bridge, check if it has a node */
951 ppnode
= pci_device_to_OF_node(ppdev
);
953 /* Ok, we have found a parent with a device-node, hand over to
954 * the OF parsing code.
955 * We build a unit address from the linux device to be used for
956 * resolution. Note that we use the linux bus number which may
957 * not match your firmware bus numbering.
958 * Fortunately, in most cases, interrupt-map-mask doesn't include
959 * the bus number as part of the matching.
960 * You should still be careful about that though if you intend
961 * to rely on this function (you ship a firmware that doesn't
962 * create device nodes for all PCI devices).
967 /* We can only get here if we hit a P2P bridge with no node,
968 * let's do standard swizzling and try again
970 lspec
= of_irq_pci_swizzle(PCI_SLOT(pdev
->devfn
), lspec
);
974 laddr
[0] = (pdev
->bus
->number
<< 16)
975 | (pdev
->devfn
<< 8);
976 laddr
[1] = laddr
[2] = 0;
977 return of_irq_map_raw(ppnode
, &lspec
, 1, laddr
, out_irq
);
979 EXPORT_SYMBOL_GPL(of_irq_map_pci
);
980 #endif /* CONFIG_PCI */