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>
21 * fdt_getprop_u32_default_node - Return a node's property or a default
23 * @fdt: ptr to device tree
24 * @off: offset of node
25 * @cell: cell offset in property
26 * @prop: property name
27 * @dflt: default value if the property isn't found
29 * Convenience function to return a node's property or a default value if
30 * the property doesn't exist.
32 u32
fdt_getprop_u32_default_node(const void *fdt
, int off
, int cell
,
33 const char *prop
, const u32 dflt
)
38 val
= fdt_getprop(fdt
, off
, prop
, &len
);
40 /* Check if property exists */
44 /* Check if property is long enough */
45 if (len
< ((cell
+ 1) * sizeof(uint32_t)))
48 return fdt32_to_cpu(*val
);
52 * fdt_getprop_u32_default - Find a node and return it's property or a default
54 * @fdt: ptr to device tree
56 * @prop: property name
57 * @dflt: default value if the property isn't found
59 * Convenience function to find a node and return it's property or a
60 * default value if it doesn't exist.
62 u32
fdt_getprop_u32_default(const void *fdt
, const char *path
,
63 const char *prop
, const u32 dflt
)
67 off
= fdt_path_offset(fdt
, path
);
71 return fdt_getprop_u32_default_node(fdt
, off
, 0, prop
, dflt
);
75 * fdt_find_and_setprop: Find a node and set it's property
77 * @fdt: ptr to device tree
79 * @prop: property name
80 * @val: ptr to new value
81 * @len: length of new property value
82 * @create: flag to create the property if it doesn't exist
84 * Convenience function to directly set a property given the path to the node.
86 int fdt_find_and_setprop(void *fdt
, const char *node
, const char *prop
,
87 const void *val
, int len
, int create
)
89 int nodeoff
= fdt_path_offset(fdt
, node
);
94 if ((!create
) && (fdt_get_property(fdt
, nodeoff
, prop
, NULL
) == NULL
))
95 return 0; /* create flag not set; so exit quietly */
97 return fdt_setprop(fdt
, nodeoff
, prop
, val
, len
);
101 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
103 * @fdt: pointer to the device tree blob
104 * @parentoffset: structure block offset of a node
105 * @name: name of the subnode to locate
107 * fdt_subnode_offset() finds a subnode of the node with a given name.
108 * If the subnode does not exist, it will be created.
110 int fdt_find_or_add_subnode(void *fdt
, int parentoffset
, const char *name
)
114 offset
= fdt_subnode_offset(fdt
, parentoffset
, name
);
116 if (offset
== -FDT_ERR_NOTFOUND
)
117 offset
= fdt_add_subnode(fdt
, parentoffset
, name
);
120 printf("%s: %s: %s\n", __func__
, name
, fdt_strerror(offset
));
125 /* rename to CONFIG_OF_STDOUT_PATH ? */
126 #if defined(OF_STDOUT_PATH)
127 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
129 return fdt_setprop(fdt
, chosenoff
, "linux,stdout-path",
130 OF_STDOUT_PATH
, strlen(OF_STDOUT_PATH
) + 1);
132 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
133 static void fdt_fill_multisername(char *sername
, size_t maxlen
)
135 const char *outname
= stdio_devices
[stdout
]->name
;
137 if (strcmp(outname
, "serial") > 0)
138 strncpy(sername
, outname
, maxlen
);
141 if (strcmp(outname
+ 1, "serial") > 0)
142 strncpy(sername
, outname
+ 1, maxlen
);
145 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
149 char sername
[9] = { 0 };
152 char tmp
[256]; /* long enough */
154 fdt_fill_multisername(sername
, sizeof(sername
) - 1);
156 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
158 aliasoff
= fdt_path_offset(fdt
, "/aliases");
164 path
= fdt_getprop(fdt
, aliasoff
, sername
, &len
);
170 /* fdt_setprop may break "path" so we copy it to tmp buffer */
171 memcpy(tmp
, path
, len
);
173 err
= fdt_setprop(fdt
, chosenoff
, "linux,stdout-path", tmp
, len
);
176 printf("WARNING: could not set linux,stdout-path %s.\n",
182 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
188 static inline int fdt_setprop_uxx(void *fdt
, int nodeoffset
, const char *name
,
189 uint64_t val
, int is_u64
)
192 return fdt_setprop_u64(fdt
, nodeoffset
, name
, val
);
194 return fdt_setprop_u32(fdt
, nodeoffset
, name
, (uint32_t)val
);
197 int fdt_root(void *fdt
)
202 err
= fdt_check_header(fdt
);
204 printf("fdt_root: %s\n", fdt_strerror(err
));
208 serial
= getenv("serial#");
210 err
= fdt_setprop(fdt
, 0, "serial-number", serial
,
214 printf("WARNING: could not set serial-number %s.\n",
223 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
)
230 /* just return if the size of initrd is zero */
231 if (initrd_start
== initrd_end
)
234 /* find or create "/chosen" node. */
235 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
239 total
= fdt_num_mem_rsv(fdt
);
242 * Look for an existing entry and update it. If we don't find
243 * the entry, we will j be the next available slot.
245 for (j
= 0; j
< total
; j
++) {
246 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
247 if (addr
== initrd_start
) {
248 fdt_del_mem_rsv(fdt
, j
);
253 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
255 printf("fdt_initrd: %s\n", fdt_strerror(err
));
259 is_u64
= (fdt_address_cells(fdt
, 0) == 2);
261 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-start",
262 (uint64_t)initrd_start
, is_u64
);
265 printf("WARNING: could not set linux,initrd-start %s.\n",
270 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-end",
271 (uint64_t)initrd_end
, is_u64
);
274 printf("WARNING: could not set linux,initrd-end %s.\n",
283 int fdt_chosen(void *fdt
)
287 char *str
; /* used to set string properties */
289 err
= fdt_check_header(fdt
);
291 printf("fdt_chosen: %s\n", fdt_strerror(err
));
295 /* find or create "/chosen" node. */
296 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
300 str
= getenv("bootargs");
302 err
= fdt_setprop(fdt
, nodeoffset
, "bootargs", str
,
305 printf("WARNING: could not set bootargs %s.\n",
311 return fdt_fixup_stdout(fdt
, nodeoffset
);
314 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
315 const void *val
, int len
, int create
)
319 debug("Updating property '%s/%s' = ", path
, prop
);
320 for (i
= 0; i
< len
; i
++)
321 debug(" %.2x", *(u8
*)(val
+i
));
324 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
326 printf("Unable to update property %s:%s, err=%s\n",
327 path
, prop
, fdt_strerror(rc
));
330 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
333 fdt32_t tmp
= cpu_to_fdt32(val
);
334 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
337 void do_fixup_by_prop(void *fdt
,
338 const char *pname
, const void *pval
, int plen
,
339 const char *prop
, const void *val
, int len
,
345 debug("Updating property '%s' = ", prop
);
346 for (i
= 0; i
< len
; i
++)
347 debug(" %.2x", *(u8
*)(val
+i
));
350 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
351 while (off
!= -FDT_ERR_NOTFOUND
) {
352 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
353 fdt_setprop(fdt
, off
, prop
, val
, len
);
354 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
358 void do_fixup_by_prop_u32(void *fdt
,
359 const char *pname
, const void *pval
, int plen
,
360 const char *prop
, u32 val
, int create
)
362 fdt32_t tmp
= cpu_to_fdt32(val
);
363 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
366 void do_fixup_by_compat(void *fdt
, const char *compat
,
367 const char *prop
, const void *val
, int len
, int create
)
372 debug("Updating property '%s' = ", prop
);
373 for (i
= 0; i
< len
; i
++)
374 debug(" %.2x", *(u8
*)(val
+i
));
377 off
= fdt_node_offset_by_compatible(fdt
, -1, compat
);
378 while (off
!= -FDT_ERR_NOTFOUND
) {
379 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
380 fdt_setprop(fdt
, off
, prop
, val
, len
);
381 off
= fdt_node_offset_by_compatible(fdt
, off
, compat
);
385 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
386 const char *prop
, u32 val
, int create
)
388 fdt32_t tmp
= cpu_to_fdt32(val
);
389 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
393 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
395 static int fdt_pack_reg(const void *fdt
, void *buf
, u64
*address
, u64
*size
,
399 int address_cells
= fdt_address_cells(fdt
, 0);
400 int size_cells
= fdt_size_cells(fdt
, 0);
403 for (i
= 0; i
< n
; i
++) {
404 if (address_cells
== 2)
405 *(fdt64_t
*)p
= cpu_to_fdt64(address
[i
]);
407 *(fdt32_t
*)p
= cpu_to_fdt32(address
[i
]);
408 p
+= 4 * address_cells
;
411 *(fdt64_t
*)p
= cpu_to_fdt64(size
[i
]);
413 *(fdt32_t
*)p
= cpu_to_fdt32(size
[i
]);
417 return p
- (char *)buf
;
420 #ifdef CONFIG_NR_DRAM_BANKS
421 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
423 #define MEMORY_BANKS_MAX 4
425 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
429 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
431 if (banks
> MEMORY_BANKS_MAX
) {
432 printf("%s: num banks %d exceeds hardcoded limit %d."
433 " Recompile with higher MEMORY_BANKS_MAX?\n",
434 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
438 err
= fdt_check_header(blob
);
440 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
444 /* find or create "/memory" node. */
445 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
449 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
452 printf("WARNING: could not set %s %s.\n", "device_type",
457 len
= fdt_pack_reg(blob
, tmp
, start
, size
, banks
);
459 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
461 printf("WARNING: could not set %s %s.\n",
462 "reg", fdt_strerror(err
));
468 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
470 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
473 void fdt_fixup_ethernet(void *fdt
)
476 char enet
[16], *tmp
, *end
;
479 unsigned char mac_addr
[6];
481 node
= fdt_path_offset(fdt
, "/aliases");
485 if (!getenv("ethaddr")) {
486 if (getenv("usbethaddr")) {
487 strcpy(mac
, "usbethaddr");
489 debug("No ethernet MAC Address defined\n");
493 strcpy(mac
, "ethaddr");
497 while ((tmp
= getenv(mac
)) != NULL
) {
498 sprintf(enet
, "ethernet%d", i
);
499 path
= fdt_getprop(fdt
, node
, enet
, NULL
);
501 debug("No alias for %s\n", enet
);
502 sprintf(mac
, "eth%daddr", ++i
);
506 for (j
= 0; j
< 6; j
++) {
507 mac_addr
[j
] = tmp
? simple_strtoul(tmp
, &end
, 16) : 0;
509 tmp
= (*end
) ? end
+1 : end
;
512 do_fixup_by_path(fdt
, path
, "mac-address", &mac_addr
, 6, 0);
513 do_fixup_by_path(fdt
, path
, "local-mac-address",
516 sprintf(mac
, "eth%daddr", ++i
);
520 /* Resize the fdt to its actual size + a bit of padding */
521 int fdt_shrink_to_minimum(void *blob
)
531 total
= fdt_num_mem_rsv(blob
);
532 for (i
= 0; i
< total
; i
++) {
533 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
534 if (addr
== (uintptr_t)blob
) {
535 fdt_del_mem_rsv(blob
, i
);
541 * Calculate the actual size of the fdt
542 * plus the size needed for 5 fdt_add_mem_rsv, one
543 * for the fdt itself and 4 for a possible initrd
544 * ((initrd-start + initrd-end) * 2 (name & value))
546 actualsize
= fdt_off_dt_strings(blob
) +
547 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
549 /* Make it so the fdt ends on a page boundary */
550 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
551 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
553 /* Change the fdt header to reflect the correct size */
554 fdt_set_totalsize(blob
, actualsize
);
556 /* Add the new reservation */
557 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
565 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
567 #define FDT_PCI_PREFETCH (0x40000000)
568 #define FDT_PCI_MEM32 (0x02000000)
569 #define FDT_PCI_IO (0x01000000)
570 #define FDT_PCI_MEM64 (0x03000000)
572 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
574 int addrcell
, sizecell
, len
, r
;
576 /* sized based on pci addr cells, size-cells, & address-cells */
577 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
579 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
580 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
582 dma_range
= &dma_ranges
[0];
583 for (r
= 0; r
< hose
->region_count
; r
++) {
584 u64 bus_start
, phys_start
, size
;
586 /* skip if !PCI_REGION_SYS_MEMORY */
587 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
590 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
591 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
592 size
= (u64
)hose
->regions
[r
].size
;
595 if (size
>= 0x100000000ull
)
596 dma_range
[0] |= FDT_PCI_MEM64
;
598 dma_range
[0] |= FDT_PCI_MEM32
;
599 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
600 dma_range
[0] |= FDT_PCI_PREFETCH
;
601 #ifdef CONFIG_SYS_PCI_64BIT
602 dma_range
[1] = bus_start
>> 32;
606 dma_range
[2] = bus_start
& 0xffffffff;
609 dma_range
[3] = phys_start
>> 32;
610 dma_range
[4] = phys_start
& 0xffffffff;
612 dma_range
[3] = phys_start
& 0xffffffff;
616 dma_range
[3 + addrcell
+ 0] = size
>> 32;
617 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
619 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
622 dma_range
+= (3 + addrcell
+ sizecell
);
625 len
= dma_range
- &dma_ranges
[0];
627 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
633 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
635 * Provide a weak default function to return the flash bank size.
636 * There might be multiple non-identical flash chips connected to one
637 * chip-select, so we need to pass an index as well.
639 u32
__flash_get_bank_size(int cs
, int idx
)
641 extern flash_info_t flash_info
[];
644 * As default, a simple 1:1 mapping is provided. Boards with
645 * a different mapping need to supply a board specific mapping
648 return flash_info
[cs
].size
;
650 u32
flash_get_bank_size(int cs
, int idx
)
651 __attribute__((weak
, alias("__flash_get_bank_size")));
654 * This function can be used to update the size in the "reg" property
655 * of all NOR FLASH device nodes. This is necessary for boards with
656 * non-fixed NOR FLASH sizes.
658 int fdt_fixup_nor_flash_size(void *blob
)
660 char compat
[][16] = { "cfi-flash", "jedec-flash" };
663 struct fdt_property
*prop
;
667 for (i
= 0; i
< 2; i
++) {
668 off
= fdt_node_offset_by_compatible(blob
, -1, compat
[i
]);
669 while (off
!= -FDT_ERR_NOTFOUND
) {
673 * Found one compatible node, so fixup the size
674 * int its reg properties
676 prop
= fdt_get_property_w(blob
, off
, "reg", &len
);
678 int tuple_size
= 3 * sizeof(reg
);
681 * There might be multiple reg-tuples,
682 * so loop through them all
684 reg
= reg2
= (u32
*)&prop
->data
[0];
685 for (idx
= 0; idx
< (len
/ tuple_size
); idx
++) {
687 * Update size in reg property
689 reg
[2] = flash_get_bank_size(reg
[0],
693 * Point to next reg tuple
698 fdt_setprop(blob
, off
, "reg", reg2
, len
);
701 /* Move to next compatible node */
702 off
= fdt_node_offset_by_compatible(blob
, off
,
711 int fdt_increase_size(void *fdt
, int add_len
)
715 newlen
= fdt_totalsize(fdt
) + add_len
;
717 /* Open in place with a new len */
718 return fdt_open_into(fdt
, fdt
, newlen
);
721 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
722 #include <jffs2/load_kernel.h>
723 #include <mtd_node.h>
730 int fdt_del_subnodes(const void *blob
, int parent_offset
)
735 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
736 (off
>= 0) && (ndepth
> 0);
737 off
= fdt_next_node(blob
, off
, &ndepth
)) {
739 debug("delete %s: offset: %x\n",
740 fdt_get_name(blob
, off
, 0), off
);
741 ret
= fdt_del_node((void *)blob
, off
);
743 printf("Can't delete node: %s\n",
755 int fdt_del_partitions(void *blob
, int parent_offset
)
762 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
763 if (off
> 0 && ndepth
== 1) {
764 prop
= fdt_getprop(blob
, off
, "label", NULL
);
767 * Could not find label property, nand {}; node?
768 * Check subnode, delete partitions there if any.
770 return fdt_del_partitions(blob
, off
);
772 ret
= fdt_del_subnodes(blob
, parent_offset
);
774 printf("Can't remove subnodes: %s\n",
783 int fdt_node_set_part_info(void *blob
, int parent_offset
,
784 struct mtd_device
*dev
)
786 struct list_head
*pentry
;
787 struct part_info
*part
;
788 struct reg_cell cell
;
793 ret
= fdt_del_partitions(blob
, parent_offset
);
798 * Check if it is nand {}; subnode, adjust
799 * the offset in this case
801 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
802 if (off
> 0 && ndepth
== 1)
806 list_for_each_prev(pentry
, &dev
->parts
) {
809 part
= list_entry(pentry
, struct part_info
, link
);
811 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
812 part_num
, part
->name
, part
->size
,
813 part
->offset
, part
->mask_flags
);
815 sprintf(buf
, "partition@%llx", part
->offset
);
817 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
818 if (ret
== -FDT_ERR_NOSPACE
) {
819 ret
= fdt_increase_size(blob
, 512);
824 } else if (ret
< 0) {
825 printf("Can't add partition node: %s\n",
831 /* Check MTD_WRITEABLE_CMD flag */
832 if (part
->mask_flags
& 1) {
834 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
835 if (ret
== -FDT_ERR_NOSPACE
) {
836 ret
= fdt_increase_size(blob
, 512);
845 cell
.r0
= cpu_to_fdt32(part
->offset
);
846 cell
.r1
= cpu_to_fdt32(part
->size
);
848 ret
= fdt_setprop(blob
, newoff
, "reg", &cell
, sizeof(cell
));
849 if (ret
== -FDT_ERR_NOSPACE
) {
850 ret
= fdt_increase_size(blob
, 512);
859 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
860 if (ret
== -FDT_ERR_NOSPACE
) {
861 ret
= fdt_increase_size(blob
, 512);
873 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
876 printf("Can't add property: %s\n", fdt_strerror(ret
));
881 * Update partitions in nor/nand nodes using info from
882 * mtdparts environment variable. The nodes to update are
883 * specified by node_info structure which contains mtd device
884 * type and compatible string: E. g. the board code in
885 * ft_board_setup() could use:
887 * struct node_info nodes[] = {
888 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
889 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
892 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
894 void fdt_fixup_mtdparts(void *blob
, void *node_info
, int node_info_size
)
896 struct node_info
*ni
= node_info
;
897 struct mtd_device
*dev
;
902 parts
= getenv("mtdparts");
906 if (mtdparts_init() != 0)
909 for (i
= 0; i
< node_info_size
; i
++) {
911 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
912 while (noff
!= -FDT_ERR_NOTFOUND
) {
913 debug("%s: %s, mtd dev type %d\n",
914 fdt_get_name(blob
, noff
, 0),
915 ni
[i
].compat
, ni
[i
].type
);
916 dev
= device_find(ni
[i
].type
, idx
++);
918 if (fdt_node_set_part_info(blob
, noff
, dev
))
919 return; /* return on error */
922 /* Jump to next flash node */
923 noff
= fdt_node_offset_by_compatible(blob
, noff
,
930 void fdt_del_node_and_alias(void *blob
, const char *alias
)
932 int off
= fdt_path_offset(blob
, alias
);
937 fdt_del_node(blob
, off
);
939 off
= fdt_path_offset(blob
, "/aliases");
940 fdt_delprop(blob
, off
, alias
);
943 /* Max address size we deal with */
944 #define OF_MAX_ADDR_CELLS 4
945 #define OF_BAD_ADDR ((u64)-1)
946 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
951 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
955 printf(" %08x", *(addr
++));
959 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
962 /* Callbacks for bus specific translators */
965 const char *addresses
;
966 void (*count_cells
)(void *blob
, int parentoffset
,
967 int *addrc
, int *sizec
);
968 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
969 int na
, int ns
, int pna
);
970 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
973 /* Default translator (generic bus) */
974 void of_bus_default_count_cells(void *blob
, int parentoffset
,
975 int *addrc
, int *sizec
)
980 *addrc
= fdt_address_cells(blob
, parentoffset
);
983 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
985 *sizec
= be32_to_cpup(prop
);
991 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
992 int na
, int ns
, int pna
)
996 cp
= of_read_number(range
, na
);
997 s
= of_read_number(range
+ na
+ pna
, ns
);
998 da
= of_read_number(addr
, na
);
1000 debug("OF: default map, cp=%" PRIu64
", s=%" PRIu64
1001 ", da=%" PRIu64
"\n", cp
, s
, da
);
1003 if (da
< cp
|| da
>= (cp
+ s
))
1008 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
1010 u64 a
= of_read_number(addr
, na
);
1011 memset(addr
, 0, na
* 4);
1014 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
1015 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
1020 /* Array of bus specific translators */
1021 static struct of_bus of_busses
[] = {
1026 .count_cells
= of_bus_default_count_cells
,
1027 .map
= of_bus_default_map
,
1028 .translate
= of_bus_default_translate
,
1032 static int of_translate_one(void * blob
, int parent
, struct of_bus
*bus
,
1033 struct of_bus
*pbus
, fdt32_t
*addr
,
1034 int na
, int ns
, int pna
, const char *rprop
)
1036 const fdt32_t
*ranges
;
1039 u64 offset
= OF_BAD_ADDR
;
1041 /* Normally, an absence of a "ranges" property means we are
1042 * crossing a non-translatable boundary, and thus the addresses
1043 * below the current not cannot be converted to CPU physical ones.
1044 * Unfortunately, while this is very clear in the spec, it's not
1045 * what Apple understood, and they do have things like /uni-n or
1046 * /ht nodes with no "ranges" property and a lot of perfectly
1047 * useable mapped devices below them. Thus we treat the absence of
1048 * "ranges" as equivalent to an empty "ranges" property which means
1049 * a 1:1 translation at that level. It's up to the caller not to try
1050 * to translate addresses that aren't supposed to be translated in
1051 * the first place. --BenH.
1053 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1054 if (ranges
== NULL
|| rlen
== 0) {
1055 offset
= of_read_number(addr
, na
);
1056 memset(addr
, 0, pna
* 4);
1057 debug("OF: no ranges, 1:1 translation\n");
1061 debug("OF: walking ranges...\n");
1063 /* Now walk through the ranges */
1065 rone
= na
+ pna
+ ns
;
1066 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1067 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1068 if (offset
!= OF_BAD_ADDR
)
1071 if (offset
== OF_BAD_ADDR
) {
1072 debug("OF: not found !\n");
1075 memcpy(addr
, ranges
+ na
, 4 * pna
);
1078 of_dump_addr("OF: parent translation for:", addr
, pna
);
1079 debug("OF: with offset: %" PRIu64
"\n", offset
);
1081 /* Translate it into parent bus space */
1082 return pbus
->translate(addr
, offset
, pna
);
1086 * Translate an address from the device-tree into a CPU physical address,
1087 * this walks up the tree and applies the various bus mappings on the
1090 * Note: We consider that crossing any level with #size-cells == 0 to mean
1091 * that translation is impossible (that is we are not dealing with a value
1092 * that can be mapped to a cpu physical address). This is not really specified
1093 * that way, but this is traditionally the way IBM at least do things
1095 static u64
__of_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
,
1099 struct of_bus
*bus
, *pbus
;
1100 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1101 int na
, ns
, pna
, pns
;
1102 u64 result
= OF_BAD_ADDR
;
1104 debug("OF: ** translation for device %s **\n",
1105 fdt_get_name(blob
, node_offset
, NULL
));
1107 /* Get parent & match bus type */
1108 parent
= fdt_parent_offset(blob
, node_offset
);
1111 bus
= &of_busses
[0];
1113 /* Cound address cells & copy address locally */
1114 bus
->count_cells(blob
, parent
, &na
, &ns
);
1115 if (!OF_CHECK_COUNTS(na
, ns
)) {
1116 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1117 fdt_get_name(blob
, node_offset
, NULL
));
1120 memcpy(addr
, in_addr
, na
* 4);
1122 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1123 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1124 of_dump_addr("OF: translating address:", addr
, na
);
1128 /* Switch to parent bus */
1129 node_offset
= parent
;
1130 parent
= fdt_parent_offset(blob
, node_offset
);
1132 /* If root, we have finished */
1134 debug("OF: reached root node\n");
1135 result
= of_read_number(addr
, na
);
1139 /* Get new parent bus and counts */
1140 pbus
= &of_busses
[0];
1141 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1142 if (!OF_CHECK_COUNTS(pna
, pns
)) {
1143 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1144 fdt_get_name(blob
, node_offset
, NULL
));
1148 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1149 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1151 /* Apply bus translation */
1152 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1153 addr
, na
, ns
, pna
, rprop
))
1156 /* Complete the move up one level */
1161 of_dump_addr("OF: one level translation:", addr
, na
);
1168 u64
fdt_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
)
1170 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1174 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1175 * who's reg property matches a physical cpu address
1177 * @blob: ptr to device tree
1178 * @compat: compatiable string to match
1179 * @compat_off: property name
1182 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1183 phys_addr_t compat_off
)
1185 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1186 while (off
!= -FDT_ERR_NOTFOUND
) {
1187 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1189 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1192 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1195 return -FDT_ERR_NOTFOUND
;
1199 * fdt_alloc_phandle: Return next free phandle value
1201 * @blob: ptr to device tree
1203 int fdt_alloc_phandle(void *blob
)
1206 uint32_t phandle
= 0;
1208 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1209 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1210 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1217 * fdt_set_phandle: Create a phandle property for the given node
1219 * @fdt: ptr to device tree
1220 * @nodeoffset: node to update
1221 * @phandle: phandle value to set (must be unique)
1223 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1228 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1230 if ((off
>= 0) && (off
!= nodeoffset
)) {
1233 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1234 printf("Trying to update node %s with phandle %u ",
1237 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1238 printf("that already exists in node %s.\n", buf
);
1239 return -FDT_ERR_BADPHANDLE
;
1243 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1248 * For now, also set the deprecated "linux,phandle" property, so that we
1249 * don't break older kernels.
1251 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1257 * fdt_create_phandle: Create a phandle property for the given node
1259 * @fdt: ptr to device tree
1260 * @nodeoffset: node to update
1262 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1264 /* see if there is a phandle already */
1265 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1267 /* if we got 0, means no phandle so create one */
1271 phandle
= fdt_alloc_phandle(fdt
);
1272 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1274 printf("Can't set phandle %u: %s\n", phandle
,
1284 * fdt_set_node_status: Set status for the given node
1286 * @fdt: ptr to device tree
1287 * @nodeoffset: node to update
1288 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1289 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1290 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1292 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1293 enum fdt_status status
, unsigned int error_code
)
1302 case FDT_STATUS_OKAY
:
1303 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1305 case FDT_STATUS_DISABLED
:
1306 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1308 case FDT_STATUS_FAIL
:
1309 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1311 case FDT_STATUS_FAIL_ERROR_CODE
:
1312 sprintf(buf
, "fail-%d", error_code
);
1313 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1316 printf("Invalid fdt status: %x\n", status
);
1325 * fdt_set_status_by_alias: Set status for the given node given an alias
1327 * @fdt: ptr to device tree
1328 * @alias: alias of node to update
1329 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1330 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1331 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1333 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1334 enum fdt_status status
, unsigned int error_code
)
1336 int offset
= fdt_path_offset(fdt
, alias
);
1338 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1341 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1342 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1347 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1348 if (noff
!= -FDT_ERR_NOTFOUND
) {
1349 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1351 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1352 if (ret
== -FDT_ERR_NOSPACE
) {
1353 ret
= fdt_increase_size(blob
, 512);
1358 } else if (ret
< 0) {
1359 printf("Can't add property: %s\n", fdt_strerror(ret
));
1365 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1371 * Verify the physical address of device tree node for a given alias
1373 * This function locates the device tree node of a given alias, and then
1374 * verifies that the physical address of that device matches the given
1375 * parameter. It displays a message if there is a mismatch.
1377 * Returns 1 on success, 0 on failure
1379 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1386 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1388 /* If there's no such alias, then it's not a failure */
1392 node
= fdt_path_offset(fdt
, path
);
1394 printf("Warning: device tree alias '%s' points to invalid "
1395 "node %s.\n", alias
, path
);
1399 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1401 printf("Warning: device tree node '%s' has no address.\n",
1406 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1407 if (addr
!= dt_addr
) {
1408 printf("Warning: U-Boot configured device %s at address %"
1409 PRIx64
",\n but the device tree has it address %"
1410 PRIx64
".\n", alias
, addr
, dt_addr
);
1418 * Returns the base address of an SOC or PCI node
1420 u64
fdt_get_base_address(void *fdt
, int node
)
1424 const fdt32_t
*prop
;
1426 naddr
= fdt_address_cells(fdt
, node
);
1428 prop
= fdt_getprop(fdt
, node
, "ranges", &size
);
1430 return prop
? fdt_translate_address(fdt
, node
, prop
+ naddr
) : 0;
1434 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1436 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1437 uint64_t *val
, int cells
)
1439 const fdt32_t
*prop32
= &prop
[cell_off
];
1440 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1442 if ((cell_off
+ cells
) > prop_len
)
1443 return -FDT_ERR_NOSPACE
;
1447 *val
= fdt32_to_cpu(*prop32
);
1450 *val
= fdt64_to_cpu(*prop64
);
1453 return -FDT_ERR_NOSPACE
;
1460 * fdt_read_range - Read a node's n'th range property
1462 * @fdt: ptr to device tree
1463 * @node: offset of node
1465 * @child_addr: pointer to storage for the "child address" field
1466 * @addr: pointer to storage for the CPU view translated physical start
1467 * @len: pointer to storage for the range length
1469 * Convenience function that reads and interprets a specific range out of
1470 * a number of the "ranges" property array.
1472 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1473 uint64_t *addr
, uint64_t *len
)
1475 int pnode
= fdt_parent_offset(fdt
, node
);
1476 const fdt32_t
*ranges
;
1485 * The "ranges" property is an array of
1486 * { <child address> <parent address> <size in child address space> }
1488 * All 3 elements can span a diffent number of cells. Fetch their size.
1490 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1491 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1492 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1494 /* Now try to get the ranges property */
1495 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1497 return -FDT_ERR_NOTFOUND
;
1498 ranges_len
/= sizeof(uint32_t);
1500 /* Jump to the n'th entry */
1501 cell
= n
* (pacells
+ acells
+ scells
);
1503 /* Read <child address> */
1505 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1512 /* Read <parent address> */
1514 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1517 /* Read <size in child address space> */
1519 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);
1528 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1530 * @fdt: ptr to device tree
1531 * @node: offset of the simplefb node
1532 * @base_address: framebuffer base address
1533 * @width: width in pixels
1534 * @height: height in pixels
1535 * @stride: bytes per line
1536 * @format: pixel format string
1538 * Convenience function to fill and enable a simplefb node.
1540 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
1541 u32 height
, u32 stride
, const char *format
)
1545 int i
, addrc
, sizec
, ret
;
1547 of_bus_default_count_cells(fdt
, fdt_parent_offset(fdt
, node
),
1551 cells
[i
++] = cpu_to_fdt32(base_address
>> 32);
1552 cells
[i
++] = cpu_to_fdt32(base_address
);
1555 cells
[i
++] = cpu_to_fdt32(height
* stride
);
1557 ret
= fdt_setprop(fdt
, node
, "reg", cells
, sizeof(cells
[0]) * i
);
1561 snprintf(name
, sizeof(name
), "framebuffer@%" PRIx64
, base_address
);
1562 ret
= fdt_set_name(fdt
, node
, name
);
1566 ret
= fdt_setprop_u32(fdt
, node
, "width", width
);
1570 ret
= fdt_setprop_u32(fdt
, node
, "height", height
);
1574 ret
= fdt_setprop_u32(fdt
, node
, "stride", stride
);
1578 ret
= fdt_setprop_string(fdt
, node
, "format", format
);
1582 ret
= fdt_setprop_string(fdt
, node
, "status", "okay");
1590 * Update native-mode in display-timings from display environment variable.
1591 * The node to update are specified by path.
1593 int fdt_fixup_display(void *blob
, const char *path
, const char *display
)
1597 if (!display
|| !path
)
1598 return -FDT_ERR_NOTFOUND
;
1600 toff
= fdt_path_offset(blob
, path
);
1602 toff
= fdt_subnode_offset(blob
, toff
, "display-timings");
1606 for (off
= fdt_first_subnode(blob
, toff
);
1608 off
= fdt_next_subnode(blob
, off
)) {
1609 uint32_t h
= fdt_get_phandle(blob
, off
);
1610 debug("%s:0x%x\n", fdt_get_name(blob
, off
, NULL
),
1612 if (strcasecmp(fdt_get_name(blob
, off
, NULL
), display
) == 0)
1613 return fdt_setprop_u32(blob
, toff
, "native-mode", h
);