3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <stdio_dev.h>
13 #include <linux/ctype.h>
14 #include <linux/types.h>
15 #include <asm/global_data.h>
17 #include <fdt_support.h>
22 * fdt_getprop_u32_default_node - Return a node's property or a default
24 * @fdt: ptr to device tree
25 * @off: offset of node
26 * @cell: cell offset in property
27 * @prop: property name
28 * @dflt: default value if the property isn't found
30 * Convenience function to return a node's property or a default value if
31 * the property doesn't exist.
33 u32
fdt_getprop_u32_default_node(const void *fdt
, int off
, int cell
,
34 const char *prop
, const u32 dflt
)
39 val
= fdt_getprop(fdt
, off
, prop
, &len
);
41 /* Check if property exists */
45 /* Check if property is long enough */
46 if (len
< ((cell
+ 1) * sizeof(uint32_t)))
49 return fdt32_to_cpu(*val
);
53 * fdt_getprop_u32_default - Find a node and return it's property or a default
55 * @fdt: ptr to device tree
57 * @prop: property name
58 * @dflt: default value if the property isn't found
60 * Convenience function to find a node and return it's property or a
61 * default value if it doesn't exist.
63 u32
fdt_getprop_u32_default(const void *fdt
, const char *path
,
64 const char *prop
, const u32 dflt
)
68 off
= fdt_path_offset(fdt
, path
);
72 return fdt_getprop_u32_default_node(fdt
, off
, 0, prop
, dflt
);
76 * fdt_find_and_setprop: Find a node and set it's property
78 * @fdt: ptr to device tree
80 * @prop: property name
81 * @val: ptr to new value
82 * @len: length of new property value
83 * @create: flag to create the property if it doesn't exist
85 * Convenience function to directly set a property given the path to the node.
87 int fdt_find_and_setprop(void *fdt
, const char *node
, const char *prop
,
88 const void *val
, int len
, int create
)
90 int nodeoff
= fdt_path_offset(fdt
, node
);
95 if ((!create
) && (fdt_get_property(fdt
, nodeoff
, prop
, NULL
) == NULL
))
96 return 0; /* create flag not set; so exit quietly */
98 return fdt_setprop(fdt
, nodeoff
, prop
, val
, len
);
102 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
104 * @fdt: pointer to the device tree blob
105 * @parentoffset: structure block offset of a node
106 * @name: name of the subnode to locate
108 * fdt_subnode_offset() finds a subnode of the node with a given name.
109 * If the subnode does not exist, it will be created.
111 int fdt_find_or_add_subnode(void *fdt
, int parentoffset
, const char *name
)
115 offset
= fdt_subnode_offset(fdt
, parentoffset
, name
);
117 if (offset
== -FDT_ERR_NOTFOUND
)
118 offset
= fdt_add_subnode(fdt
, parentoffset
, name
);
121 printf("%s: %s: %s\n", __func__
, name
, fdt_strerror(offset
));
126 /* rename to CONFIG_OF_STDOUT_PATH ? */
127 #if defined(OF_STDOUT_PATH)
128 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
130 return fdt_setprop(fdt
, chosenoff
, "linux,stdout-path",
131 OF_STDOUT_PATH
, strlen(OF_STDOUT_PATH
) + 1);
133 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
134 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
138 char sername
[9] = { 0 };
141 char tmp
[256]; /* long enough */
143 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
145 aliasoff
= fdt_path_offset(fdt
, "/aliases");
151 path
= fdt_getprop(fdt
, aliasoff
, sername
, &len
);
157 /* fdt_setprop may break "path" so we copy it to tmp buffer */
158 memcpy(tmp
, path
, len
);
160 err
= fdt_setprop(fdt
, chosenoff
, "linux,stdout-path", tmp
, len
);
162 printf("WARNING: could not set linux,stdout-path %s.\n",
168 printf("WARNING: %s: could not read %s alias: %s\n",
169 __func__
, sername
, fdt_strerror(err
));
174 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
180 static inline int fdt_setprop_uxx(void *fdt
, int nodeoffset
, const char *name
,
181 uint64_t val
, int is_u64
)
184 return fdt_setprop_u64(fdt
, nodeoffset
, name
, val
);
186 return fdt_setprop_u32(fdt
, nodeoffset
, name
, (uint32_t)val
);
189 int fdt_root(void *fdt
)
194 err
= fdt_check_header(fdt
);
196 printf("fdt_root: %s\n", fdt_strerror(err
));
200 serial
= getenv("serial#");
202 err
= fdt_setprop(fdt
, 0, "serial-number", serial
,
206 printf("WARNING: could not set serial-number %s.\n",
215 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
)
222 /* just return if the size of initrd is zero */
223 if (initrd_start
== initrd_end
)
226 /* find or create "/chosen" node. */
227 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
231 total
= fdt_num_mem_rsv(fdt
);
234 * Look for an existing entry and update it. If we don't find
235 * the entry, we will j be the next available slot.
237 for (j
= 0; j
< total
; j
++) {
238 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
239 if (addr
== initrd_start
) {
240 fdt_del_mem_rsv(fdt
, j
);
245 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
247 printf("fdt_initrd: %s\n", fdt_strerror(err
));
251 is_u64
= (fdt_address_cells(fdt
, 0) == 2);
253 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-start",
254 (uint64_t)initrd_start
, is_u64
);
257 printf("WARNING: could not set linux,initrd-start %s.\n",
262 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-end",
263 (uint64_t)initrd_end
, is_u64
);
266 printf("WARNING: could not set linux,initrd-end %s.\n",
275 int fdt_chosen(void *fdt
)
279 char *str
; /* used to set string properties */
281 err
= fdt_check_header(fdt
);
283 printf("fdt_chosen: %s\n", fdt_strerror(err
));
287 /* find or create "/chosen" node. */
288 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
292 str
= getenv("bootargs");
294 err
= fdt_setprop(fdt
, nodeoffset
, "bootargs", str
,
297 printf("WARNING: could not set bootargs %s.\n",
303 return fdt_fixup_stdout(fdt
, nodeoffset
);
306 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
307 const void *val
, int len
, int create
)
311 debug("Updating property '%s/%s' = ", path
, prop
);
312 for (i
= 0; i
< len
; i
++)
313 debug(" %.2x", *(u8
*)(val
+i
));
316 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
318 printf("Unable to update property %s:%s, err=%s\n",
319 path
, prop
, fdt_strerror(rc
));
322 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
325 fdt32_t tmp
= cpu_to_fdt32(val
);
326 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
329 void do_fixup_by_prop(void *fdt
,
330 const char *pname
, const void *pval
, int plen
,
331 const char *prop
, const void *val
, int len
,
337 debug("Updating property '%s' = ", prop
);
338 for (i
= 0; i
< len
; i
++)
339 debug(" %.2x", *(u8
*)(val
+i
));
342 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
343 while (off
!= -FDT_ERR_NOTFOUND
) {
344 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
345 fdt_setprop(fdt
, off
, prop
, val
, len
);
346 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
350 void do_fixup_by_prop_u32(void *fdt
,
351 const char *pname
, const void *pval
, int plen
,
352 const char *prop
, u32 val
, int create
)
354 fdt32_t tmp
= cpu_to_fdt32(val
);
355 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
358 void do_fixup_by_compat(void *fdt
, const char *compat
,
359 const char *prop
, const void *val
, int len
, int create
)
364 debug("Updating property '%s' = ", prop
);
365 for (i
= 0; i
< len
; i
++)
366 debug(" %.2x", *(u8
*)(val
+i
));
369 off
= fdt_node_offset_by_compatible(fdt
, -1, compat
);
370 while (off
!= -FDT_ERR_NOTFOUND
) {
371 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
372 fdt_setprop(fdt
, off
, prop
, val
, len
);
373 off
= fdt_node_offset_by_compatible(fdt
, off
, compat
);
377 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
378 const char *prop
, u32 val
, int create
)
380 fdt32_t tmp
= cpu_to_fdt32(val
);
381 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
384 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
386 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
388 static int fdt_pack_reg(const void *fdt
, void *buf
, u64
*address
, u64
*size
,
392 int address_cells
= fdt_address_cells(fdt
, 0);
393 int size_cells
= fdt_size_cells(fdt
, 0);
396 for (i
= 0; i
< n
; i
++) {
397 if (address_cells
== 2)
398 *(fdt64_t
*)p
= cpu_to_fdt64(address
[i
]);
400 *(fdt32_t
*)p
= cpu_to_fdt32(address
[i
]);
401 p
+= 4 * address_cells
;
404 *(fdt64_t
*)p
= cpu_to_fdt64(size
[i
]);
406 *(fdt32_t
*)p
= cpu_to_fdt32(size
[i
]);
410 return p
- (char *)buf
;
413 #ifdef CONFIG_NR_DRAM_BANKS
414 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
416 #define MEMORY_BANKS_MAX 4
418 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
422 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
424 if (banks
> MEMORY_BANKS_MAX
) {
425 printf("%s: num banks %d exceeds hardcoded limit %d."
426 " Recompile with higher MEMORY_BANKS_MAX?\n",
427 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
431 err
= fdt_check_header(blob
);
433 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
437 /* find or create "/memory" node. */
438 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
442 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
445 printf("WARNING: could not set %s %s.\n", "device_type",
453 len
= fdt_pack_reg(blob
, tmp
, start
, size
, banks
);
455 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
457 printf("WARNING: could not set %s %s.\n",
458 "reg", fdt_strerror(err
));
465 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
467 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
470 void fdt_fixup_ethernet(void *fdt
)
476 unsigned char mac_addr
[ARP_HLEN
];
479 if (fdt_path_offset(fdt
, "/aliases") < 0)
482 /* Cycle through all aliases */
483 for (prop
= 0; ; prop
++) {
486 /* FDT might have been edited, recompute the offset */
487 offset
= fdt_first_property_offset(fdt
,
488 fdt_path_offset(fdt
, "/aliases"));
489 /* Select property number 'prop' */
490 for (i
= 0; i
< prop
; i
++)
491 offset
= fdt_next_property_offset(fdt
, offset
);
496 path
= fdt_getprop_by_offset(fdt
, offset
, &name
, NULL
);
497 if (!strncmp(name
, "ethernet", 8)) {
498 /* Treat plain "ethernet" same as "ethernet0". */
499 if (!strcmp(name
, "ethernet"))
502 i
= trailing_strtol(name
);
506 strcpy(mac
, "ethaddr");
508 sprintf(mac
, "eth%daddr", i
);
516 for (j
= 0; j
< 6; j
++) {
518 simple_strtoul(tmp
, &end
, 16) : 0;
520 tmp
= (*end
) ? end
+ 1 : end
;
523 do_fixup_by_path(fdt
, path
, "mac-address",
525 do_fixup_by_path(fdt
, path
, "local-mac-address",
531 /* Resize the fdt to its actual size + a bit of padding */
532 int fdt_shrink_to_minimum(void *blob
, uint extrasize
)
542 total
= fdt_num_mem_rsv(blob
);
543 for (i
= 0; i
< total
; i
++) {
544 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
545 if (addr
== (uintptr_t)blob
) {
546 fdt_del_mem_rsv(blob
, i
);
552 * Calculate the actual size of the fdt
553 * plus the size needed for 5 fdt_add_mem_rsv, one
554 * for the fdt itself and 4 for a possible initrd
555 * ((initrd-start + initrd-end) * 2 (name & value))
557 actualsize
= fdt_off_dt_strings(blob
) +
558 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
560 actualsize
+= extrasize
;
561 /* Make it so the fdt ends on a page boundary */
562 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
563 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
565 /* Change the fdt header to reflect the correct size */
566 fdt_set_totalsize(blob
, actualsize
);
568 /* Add the new reservation */
569 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
577 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
579 #define FDT_PCI_PREFETCH (0x40000000)
580 #define FDT_PCI_MEM32 (0x02000000)
581 #define FDT_PCI_IO (0x01000000)
582 #define FDT_PCI_MEM64 (0x03000000)
584 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
586 int addrcell
, sizecell
, len
, r
;
588 /* sized based on pci addr cells, size-cells, & address-cells */
589 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
591 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
592 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
594 dma_range
= &dma_ranges
[0];
595 for (r
= 0; r
< hose
->region_count
; r
++) {
596 u64 bus_start
, phys_start
, size
;
598 /* skip if !PCI_REGION_SYS_MEMORY */
599 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
602 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
603 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
604 size
= (u64
)hose
->regions
[r
].size
;
607 if (size
>= 0x100000000ull
)
608 dma_range
[0] |= FDT_PCI_MEM64
;
610 dma_range
[0] |= FDT_PCI_MEM32
;
611 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
612 dma_range
[0] |= FDT_PCI_PREFETCH
;
613 #ifdef CONFIG_SYS_PCI_64BIT
614 dma_range
[1] = bus_start
>> 32;
618 dma_range
[2] = bus_start
& 0xffffffff;
621 dma_range
[3] = phys_start
>> 32;
622 dma_range
[4] = phys_start
& 0xffffffff;
624 dma_range
[3] = phys_start
& 0xffffffff;
628 dma_range
[3 + addrcell
+ 0] = size
>> 32;
629 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
631 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
634 dma_range
+= (3 + addrcell
+ sizecell
);
637 len
= dma_range
- &dma_ranges
[0];
639 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
645 int fdt_increase_size(void *fdt
, int add_len
)
649 newlen
= fdt_totalsize(fdt
) + add_len
;
651 /* Open in place with a new len */
652 return fdt_open_into(fdt
, fdt
, newlen
);
655 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
656 #include <jffs2/load_kernel.h>
657 #include <mtd_node.h>
664 int fdt_del_subnodes(const void *blob
, int parent_offset
)
669 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
670 (off
>= 0) && (ndepth
> 0);
671 off
= fdt_next_node(blob
, off
, &ndepth
)) {
673 debug("delete %s: offset: %x\n",
674 fdt_get_name(blob
, off
, 0), off
);
675 ret
= fdt_del_node((void *)blob
, off
);
677 printf("Can't delete node: %s\n",
689 int fdt_del_partitions(void *blob
, int parent_offset
)
696 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
697 if (off
> 0 && ndepth
== 1) {
698 prop
= fdt_getprop(blob
, off
, "label", NULL
);
701 * Could not find label property, nand {}; node?
702 * Check subnode, delete partitions there if any.
704 return fdt_del_partitions(blob
, off
);
706 ret
= fdt_del_subnodes(blob
, parent_offset
);
708 printf("Can't remove subnodes: %s\n",
717 int fdt_node_set_part_info(void *blob
, int parent_offset
,
718 struct mtd_device
*dev
)
720 struct list_head
*pentry
;
721 struct part_info
*part
;
722 struct reg_cell cell
;
727 ret
= fdt_del_partitions(blob
, parent_offset
);
732 * Check if it is nand {}; subnode, adjust
733 * the offset in this case
735 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
736 if (off
> 0 && ndepth
== 1)
740 list_for_each_prev(pentry
, &dev
->parts
) {
743 part
= list_entry(pentry
, struct part_info
, link
);
745 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
746 part_num
, part
->name
, part
->size
,
747 part
->offset
, part
->mask_flags
);
749 sprintf(buf
, "partition@%llx", part
->offset
);
751 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
752 if (ret
== -FDT_ERR_NOSPACE
) {
753 ret
= fdt_increase_size(blob
, 512);
758 } else if (ret
< 0) {
759 printf("Can't add partition node: %s\n",
765 /* Check MTD_WRITEABLE_CMD flag */
766 if (part
->mask_flags
& 1) {
768 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
769 if (ret
== -FDT_ERR_NOSPACE
) {
770 ret
= fdt_increase_size(blob
, 512);
779 cell
.r0
= cpu_to_fdt32(part
->offset
);
780 cell
.r1
= cpu_to_fdt32(part
->size
);
782 ret
= fdt_setprop(blob
, newoff
, "reg", &cell
, sizeof(cell
));
783 if (ret
== -FDT_ERR_NOSPACE
) {
784 ret
= fdt_increase_size(blob
, 512);
793 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
794 if (ret
== -FDT_ERR_NOSPACE
) {
795 ret
= fdt_increase_size(blob
, 512);
807 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
810 printf("Can't add property: %s\n", fdt_strerror(ret
));
815 * Update partitions in nor/nand nodes using info from
816 * mtdparts environment variable. The nodes to update are
817 * specified by node_info structure which contains mtd device
818 * type and compatible string: E. g. the board code in
819 * ft_board_setup() could use:
821 * struct node_info nodes[] = {
822 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
823 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
826 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
828 void fdt_fixup_mtdparts(void *blob
, void *node_info
, int node_info_size
)
830 struct node_info
*ni
= node_info
;
831 struct mtd_device
*dev
;
835 if (mtdparts_init() != 0)
838 for (i
= 0; i
< node_info_size
; i
++) {
840 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
841 while (noff
!= -FDT_ERR_NOTFOUND
) {
842 debug("%s: %s, mtd dev type %d\n",
843 fdt_get_name(blob
, noff
, 0),
844 ni
[i
].compat
, ni
[i
].type
);
845 dev
= device_find(ni
[i
].type
, idx
++);
847 if (fdt_node_set_part_info(blob
, noff
, dev
))
848 return; /* return on error */
851 /* Jump to next flash node */
852 noff
= fdt_node_offset_by_compatible(blob
, noff
,
859 void fdt_del_node_and_alias(void *blob
, const char *alias
)
861 int off
= fdt_path_offset(blob
, alias
);
866 fdt_del_node(blob
, off
);
868 off
= fdt_path_offset(blob
, "/aliases");
869 fdt_delprop(blob
, off
, alias
);
872 /* Max address size we deal with */
873 #define OF_MAX_ADDR_CELLS 4
874 #define OF_BAD_ADDR FDT_ADDR_T_NONE
875 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
880 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
884 printf(" %08x", *(addr
++));
888 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
892 * struct of_bus - Callbacks for bus specific translators
893 * @name: A string used to identify this bus in debug output.
894 * @addresses: The name of the DT property from which addresses are
895 * to be read, typically "reg".
896 * @match: Return non-zero if the node whose parent is at
897 * parentoffset in the FDT blob corresponds to a bus
898 * of this type, otherwise return zero. If NULL a match
900 * @count_cells:Count how many cells (be32 values) a node whose parent
901 * is at parentoffset in the FDT blob will require to
902 * represent its address (written to *addrc) & size
903 * (written to *sizec).
904 * @map: Map the address addr from the address space of this
905 * bus to that of its parent, making use of the ranges
906 * read from DT to an array at range. na and ns are the
907 * number of cells (be32 values) used to hold and address
908 * or size, respectively, for this bus. pna is the number
909 * of cells used to hold an address for the parent bus.
910 * Returns the address in the address space of the parent
912 * @translate: Update the value of the address cells at addr within an
913 * FDT by adding offset to it. na specifies the number of
914 * cells used to hold the address being translated. Returns
915 * zero on success, non-zero on error.
917 * Each bus type will include a struct of_bus in the of_busses array,
918 * providing implementations of some or all of the functions used to
919 * match the bus & handle address translation for its children.
923 const char *addresses
;
924 int (*match
)(const void *blob
, int parentoffset
);
925 void (*count_cells
)(const void *blob
, int parentoffset
,
926 int *addrc
, int *sizec
);
927 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
928 int na
, int ns
, int pna
);
929 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
932 /* Default translator (generic bus) */
933 void fdt_support_default_count_cells(const void *blob
, int parentoffset
,
934 int *addrc
, int *sizec
)
939 *addrc
= fdt_address_cells(blob
, parentoffset
);
942 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
944 *sizec
= be32_to_cpup(prop
);
950 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
951 int na
, int ns
, int pna
)
955 cp
= fdt_read_number(range
, na
);
956 s
= fdt_read_number(range
+ na
+ pna
, ns
);
957 da
= fdt_read_number(addr
, na
);
959 debug("OF: default map, cp=%" PRIu64
", s=%" PRIu64
960 ", da=%" PRIu64
"\n", cp
, s
, da
);
962 if (da
< cp
|| da
>= (cp
+ s
))
967 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
969 u64 a
= fdt_read_number(addr
, na
);
970 memset(addr
, 0, na
* 4);
973 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
974 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
979 #ifdef CONFIG_OF_ISA_BUS
981 /* ISA bus translator */
982 static int of_bus_isa_match(const void *blob
, int parentoffset
)
986 name
= fdt_get_name(blob
, parentoffset
, NULL
);
990 return !strcmp(name
, "isa");
993 static void of_bus_isa_count_cells(const void *blob
, int parentoffset
,
994 int *addrc
, int *sizec
)
1002 static u64
of_bus_isa_map(fdt32_t
*addr
, const fdt32_t
*range
,
1003 int na
, int ns
, int pna
)
1007 /* Check address type match */
1008 if ((addr
[0] ^ range
[0]) & cpu_to_be32(1))
1011 cp
= fdt_read_number(range
+ 1, na
- 1);
1012 s
= fdt_read_number(range
+ na
+ pna
, ns
);
1013 da
= fdt_read_number(addr
+ 1, na
- 1);
1015 debug("OF: ISA map, cp=%" PRIu64
", s=%" PRIu64
1016 ", da=%" PRIu64
"\n", cp
, s
, da
);
1018 if (da
< cp
|| da
>= (cp
+ s
))
1023 static int of_bus_isa_translate(fdt32_t
*addr
, u64 offset
, int na
)
1025 return of_bus_default_translate(addr
+ 1, offset
, na
- 1);
1028 #endif /* CONFIG_OF_ISA_BUS */
1030 /* Array of bus specific translators */
1031 static struct of_bus of_busses
[] = {
1032 #ifdef CONFIG_OF_ISA_BUS
1037 .match
= of_bus_isa_match
,
1038 .count_cells
= of_bus_isa_count_cells
,
1039 .map
= of_bus_isa_map
,
1040 .translate
= of_bus_isa_translate
,
1042 #endif /* CONFIG_OF_ISA_BUS */
1047 .count_cells
= fdt_support_default_count_cells
,
1048 .map
= of_bus_default_map
,
1049 .translate
= of_bus_default_translate
,
1053 static struct of_bus
*of_match_bus(const void *blob
, int parentoffset
)
1057 if (ARRAY_SIZE(of_busses
) == 1)
1060 for (bus
= of_busses
; bus
; bus
++) {
1061 if (!bus
->match
|| bus
->match(blob
, parentoffset
))
1066 * We should always have matched the default bus at least, since
1067 * it has a NULL match field. If we didn't then it somehow isn't
1068 * in the of_busses array or something equally catastrophic has
1075 static int of_translate_one(const void *blob
, int parent
, struct of_bus
*bus
,
1076 struct of_bus
*pbus
, fdt32_t
*addr
,
1077 int na
, int ns
, int pna
, const char *rprop
)
1079 const fdt32_t
*ranges
;
1082 u64 offset
= OF_BAD_ADDR
;
1084 /* Normally, an absence of a "ranges" property means we are
1085 * crossing a non-translatable boundary, and thus the addresses
1086 * below the current not cannot be converted to CPU physical ones.
1087 * Unfortunately, while this is very clear in the spec, it's not
1088 * what Apple understood, and they do have things like /uni-n or
1089 * /ht nodes with no "ranges" property and a lot of perfectly
1090 * useable mapped devices below them. Thus we treat the absence of
1091 * "ranges" as equivalent to an empty "ranges" property which means
1092 * a 1:1 translation at that level. It's up to the caller not to try
1093 * to translate addresses that aren't supposed to be translated in
1094 * the first place. --BenH.
1096 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1097 if (ranges
== NULL
|| rlen
== 0) {
1098 offset
= fdt_read_number(addr
, na
);
1099 memset(addr
, 0, pna
* 4);
1100 debug("OF: no ranges, 1:1 translation\n");
1104 debug("OF: walking ranges...\n");
1106 /* Now walk through the ranges */
1108 rone
= na
+ pna
+ ns
;
1109 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1110 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1111 if (offset
!= OF_BAD_ADDR
)
1114 if (offset
== OF_BAD_ADDR
) {
1115 debug("OF: not found !\n");
1118 memcpy(addr
, ranges
+ na
, 4 * pna
);
1121 of_dump_addr("OF: parent translation for:", addr
, pna
);
1122 debug("OF: with offset: %" PRIu64
"\n", offset
);
1124 /* Translate it into parent bus space */
1125 return pbus
->translate(addr
, offset
, pna
);
1129 * Translate an address from the device-tree into a CPU physical address,
1130 * this walks up the tree and applies the various bus mappings on the
1133 * Note: We consider that crossing any level with #size-cells == 0 to mean
1134 * that translation is impossible (that is we are not dealing with a value
1135 * that can be mapped to a cpu physical address). This is not really specified
1136 * that way, but this is traditionally the way IBM at least do things
1138 static u64
__of_translate_address(const void *blob
, int node_offset
,
1139 const fdt32_t
*in_addr
, const char *rprop
)
1142 struct of_bus
*bus
, *pbus
;
1143 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1144 int na
, ns
, pna
, pns
;
1145 u64 result
= OF_BAD_ADDR
;
1147 debug("OF: ** translation for device %s **\n",
1148 fdt_get_name(blob
, node_offset
, NULL
));
1150 /* Get parent & match bus type */
1151 parent
= fdt_parent_offset(blob
, node_offset
);
1154 bus
= of_match_bus(blob
, parent
);
1156 /* Cound address cells & copy address locally */
1157 bus
->count_cells(blob
, parent
, &na
, &ns
);
1158 if (!OF_CHECK_COUNTS(na
, ns
)) {
1159 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1160 fdt_get_name(blob
, node_offset
, NULL
));
1163 memcpy(addr
, in_addr
, na
* 4);
1165 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1166 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1167 of_dump_addr("OF: translating address:", addr
, na
);
1171 /* Switch to parent bus */
1172 node_offset
= parent
;
1173 parent
= fdt_parent_offset(blob
, node_offset
);
1175 /* If root, we have finished */
1177 debug("OF: reached root node\n");
1178 result
= fdt_read_number(addr
, na
);
1182 /* Get new parent bus and counts */
1183 pbus
= of_match_bus(blob
, parent
);
1184 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1185 if (!OF_CHECK_COUNTS(pna
, pns
)) {
1186 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1187 fdt_get_name(blob
, node_offset
, NULL
));
1191 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1192 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1194 /* Apply bus translation */
1195 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1196 addr
, na
, ns
, pna
, rprop
))
1199 /* Complete the move up one level */
1204 of_dump_addr("OF: one level translation:", addr
, na
);
1211 u64
fdt_translate_address(const void *blob
, int node_offset
,
1212 const fdt32_t
*in_addr
)
1214 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1218 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1219 * who's reg property matches a physical cpu address
1221 * @blob: ptr to device tree
1222 * @compat: compatiable string to match
1223 * @compat_off: property name
1226 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1227 phys_addr_t compat_off
)
1229 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1230 while (off
!= -FDT_ERR_NOTFOUND
) {
1231 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1233 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1236 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1239 return -FDT_ERR_NOTFOUND
;
1243 * fdt_alloc_phandle: Return next free phandle value
1245 * @blob: ptr to device tree
1247 int fdt_alloc_phandle(void *blob
)
1250 uint32_t phandle
= 0;
1252 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1253 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1254 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1261 * fdt_set_phandle: Create a phandle property for the given node
1263 * @fdt: ptr to device tree
1264 * @nodeoffset: node to update
1265 * @phandle: phandle value to set (must be unique)
1267 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1272 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1274 if ((off
>= 0) && (off
!= nodeoffset
)) {
1277 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1278 printf("Trying to update node %s with phandle %u ",
1281 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1282 printf("that already exists in node %s.\n", buf
);
1283 return -FDT_ERR_BADPHANDLE
;
1287 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1292 * For now, also set the deprecated "linux,phandle" property, so that we
1293 * don't break older kernels.
1295 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1301 * fdt_create_phandle: Create a phandle property for the given node
1303 * @fdt: ptr to device tree
1304 * @nodeoffset: node to update
1306 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1308 /* see if there is a phandle already */
1309 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1311 /* if we got 0, means no phandle so create one */
1315 phandle
= fdt_alloc_phandle(fdt
);
1316 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1318 printf("Can't set phandle %u: %s\n", phandle
,
1328 * fdt_set_node_status: Set status for the given node
1330 * @fdt: ptr to device tree
1331 * @nodeoffset: node to update
1332 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1333 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1334 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1336 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1337 enum fdt_status status
, unsigned int error_code
)
1346 case FDT_STATUS_OKAY
:
1347 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1349 case FDT_STATUS_DISABLED
:
1350 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1352 case FDT_STATUS_FAIL
:
1353 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1355 case FDT_STATUS_FAIL_ERROR_CODE
:
1356 sprintf(buf
, "fail-%d", error_code
);
1357 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1360 printf("Invalid fdt status: %x\n", status
);
1369 * fdt_set_status_by_alias: Set status for the given node given an alias
1371 * @fdt: ptr to device tree
1372 * @alias: alias of node to update
1373 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1374 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1375 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1377 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1378 enum fdt_status status
, unsigned int error_code
)
1380 int offset
= fdt_path_offset(fdt
, alias
);
1382 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1385 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1386 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1391 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1392 if (noff
!= -FDT_ERR_NOTFOUND
) {
1393 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1395 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1396 if (ret
== -FDT_ERR_NOSPACE
) {
1397 ret
= fdt_increase_size(blob
, 512);
1402 } else if (ret
< 0) {
1403 printf("Can't add property: %s\n", fdt_strerror(ret
));
1409 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1415 * Verify the physical address of device tree node for a given alias
1417 * This function locates the device tree node of a given alias, and then
1418 * verifies that the physical address of that device matches the given
1419 * parameter. It displays a message if there is a mismatch.
1421 * Returns 1 on success, 0 on failure
1423 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1430 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1432 /* If there's no such alias, then it's not a failure */
1436 node
= fdt_path_offset(fdt
, path
);
1438 printf("Warning: device tree alias '%s' points to invalid "
1439 "node %s.\n", alias
, path
);
1443 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1445 printf("Warning: device tree node '%s' has no address.\n",
1450 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1451 if (addr
!= dt_addr
) {
1452 printf("Warning: U-Boot configured device %s at address %"
1453 PRIx64
",\n but the device tree has it address %"
1454 PRIx64
".\n", alias
, addr
, dt_addr
);
1462 * Returns the base address of an SOC or PCI node
1464 u64
fdt_get_base_address(const void *fdt
, int node
)
1468 const fdt32_t
*prop
;
1470 naddr
= fdt_address_cells(fdt
, node
);
1472 prop
= fdt_getprop(fdt
, node
, "ranges", &size
);
1474 return prop
? fdt_translate_address(fdt
, node
, prop
+ naddr
) : 0;
1478 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1480 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1481 uint64_t *val
, int cells
)
1483 const fdt32_t
*prop32
= &prop
[cell_off
];
1484 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1486 if ((cell_off
+ cells
) > prop_len
)
1487 return -FDT_ERR_NOSPACE
;
1491 *val
= fdt32_to_cpu(*prop32
);
1494 *val
= fdt64_to_cpu(*prop64
);
1497 return -FDT_ERR_NOSPACE
;
1504 * fdt_read_range - Read a node's n'th range property
1506 * @fdt: ptr to device tree
1507 * @node: offset of node
1509 * @child_addr: pointer to storage for the "child address" field
1510 * @addr: pointer to storage for the CPU view translated physical start
1511 * @len: pointer to storage for the range length
1513 * Convenience function that reads and interprets a specific range out of
1514 * a number of the "ranges" property array.
1516 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1517 uint64_t *addr
, uint64_t *len
)
1519 int pnode
= fdt_parent_offset(fdt
, node
);
1520 const fdt32_t
*ranges
;
1529 * The "ranges" property is an array of
1530 * { <child address> <parent address> <size in child address space> }
1532 * All 3 elements can span a diffent number of cells. Fetch their size.
1534 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1535 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1536 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1538 /* Now try to get the ranges property */
1539 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1541 return -FDT_ERR_NOTFOUND
;
1542 ranges_len
/= sizeof(uint32_t);
1544 /* Jump to the n'th entry */
1545 cell
= n
* (pacells
+ acells
+ scells
);
1547 /* Read <child address> */
1549 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1556 /* Read <parent address> */
1558 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1561 /* Read <size in child address space> */
1563 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);
1572 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1574 * @fdt: ptr to device tree
1575 * @node: offset of the simplefb node
1576 * @base_address: framebuffer base address
1577 * @width: width in pixels
1578 * @height: height in pixels
1579 * @stride: bytes per line
1580 * @format: pixel format string
1582 * Convenience function to fill and enable a simplefb node.
1584 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
1585 u32 height
, u32 stride
, const char *format
)
1589 int i
, addrc
, sizec
, ret
;
1591 fdt_support_default_count_cells(fdt
, fdt_parent_offset(fdt
, node
),
1595 cells
[i
++] = cpu_to_fdt32(base_address
>> 32);
1596 cells
[i
++] = cpu_to_fdt32(base_address
);
1599 cells
[i
++] = cpu_to_fdt32(height
* stride
);
1601 ret
= fdt_setprop(fdt
, node
, "reg", cells
, sizeof(cells
[0]) * i
);
1605 snprintf(name
, sizeof(name
), "framebuffer@%" PRIx64
, base_address
);
1606 ret
= fdt_set_name(fdt
, node
, name
);
1610 ret
= fdt_setprop_u32(fdt
, node
, "width", width
);
1614 ret
= fdt_setprop_u32(fdt
, node
, "height", height
);
1618 ret
= fdt_setprop_u32(fdt
, node
, "stride", stride
);
1622 ret
= fdt_setprop_string(fdt
, node
, "format", format
);
1626 ret
= fdt_setprop_string(fdt
, node
, "status", "okay");
1634 * Update native-mode in display-timings from display environment variable.
1635 * The node to update are specified by path.
1637 int fdt_fixup_display(void *blob
, const char *path
, const char *display
)
1641 if (!display
|| !path
)
1642 return -FDT_ERR_NOTFOUND
;
1644 toff
= fdt_path_offset(blob
, path
);
1646 toff
= fdt_subnode_offset(blob
, toff
, "display-timings");
1650 for (off
= fdt_first_subnode(blob
, toff
);
1652 off
= fdt_next_subnode(blob
, off
)) {
1653 uint32_t h
= fdt_get_phandle(blob
, off
);
1654 debug("%s:0x%x\n", fdt_get_name(blob
, off
, NULL
),
1656 if (strcasecmp(fdt_get_name(blob
, off
, NULL
), display
) == 0)
1657 return fdt_setprop_u32(blob
, toff
, "native-mode", h
);