1 // SPDX-License-Identifier: GPL-2.0+
4 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
6 * Copyright 2010-2011 Freescale Semiconductor, Inc.
11 #include <stdio_dev.h>
12 #include <linux/ctype.h>
13 #include <linux/types.h>
14 #include <asm/global_data.h>
15 #include <linux/libfdt.h>
16 #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 int fdt_fixup_stdout(void *fdt
, int chosenoff
)
137 char sername
[9] = { 0 };
140 char tmp
[256]; /* long enough */
142 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
144 aliasoff
= fdt_path_offset(fdt
, "/aliases");
150 path
= fdt_getprop(fdt
, aliasoff
, sername
, &len
);
156 /* fdt_setprop may break "path" so we copy it to tmp buffer */
157 memcpy(tmp
, path
, len
);
159 err
= fdt_setprop(fdt
, chosenoff
, "linux,stdout-path", tmp
, len
);
161 printf("WARNING: could not set linux,stdout-path %s.\n",
167 printf("WARNING: %s: could not read %s alias: %s\n",
168 __func__
, sername
, fdt_strerror(err
));
173 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
179 static inline int fdt_setprop_uxx(void *fdt
, int nodeoffset
, const char *name
,
180 uint64_t val
, int is_u64
)
183 return fdt_setprop_u64(fdt
, nodeoffset
, name
, val
);
185 return fdt_setprop_u32(fdt
, nodeoffset
, name
, (uint32_t)val
);
188 int fdt_root(void *fdt
)
193 err
= fdt_check_header(fdt
);
195 printf("fdt_root: %s\n", fdt_strerror(err
));
199 serial
= env_get("serial#");
201 err
= fdt_setprop(fdt
, 0, "serial-number", serial
,
205 printf("WARNING: could not set serial-number %s.\n",
214 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
)
221 /* just return if the size of initrd is zero */
222 if (initrd_start
== initrd_end
)
225 /* find or create "/chosen" node. */
226 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
230 total
= fdt_num_mem_rsv(fdt
);
233 * Look for an existing entry and update it. If we don't find
234 * the entry, we will j be the next available slot.
236 for (j
= 0; j
< total
; j
++) {
237 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
238 if (addr
== initrd_start
) {
239 fdt_del_mem_rsv(fdt
, j
);
244 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
246 printf("fdt_initrd: %s\n", fdt_strerror(err
));
250 is_u64
= (fdt_address_cells(fdt
, 0) == 2);
252 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-start",
253 (uint64_t)initrd_start
, is_u64
);
256 printf("WARNING: could not set linux,initrd-start %s.\n",
261 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-end",
262 (uint64_t)initrd_end
, is_u64
);
265 printf("WARNING: could not set linux,initrd-end %s.\n",
274 int fdt_chosen(void *fdt
)
278 char *str
; /* used to set string properties */
280 err
= fdt_check_header(fdt
);
282 printf("fdt_chosen: %s\n", fdt_strerror(err
));
286 /* find or create "/chosen" node. */
287 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
291 str
= env_get("bootargs");
293 err
= fdt_setprop(fdt
, nodeoffset
, "bootargs", str
,
296 printf("WARNING: could not set bootargs %s.\n",
302 return fdt_fixup_stdout(fdt
, nodeoffset
);
305 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
306 const void *val
, int len
, int create
)
310 debug("Updating property '%s/%s' = ", path
, prop
);
311 for (i
= 0; i
< len
; i
++)
312 debug(" %.2x", *(u8
*)(val
+i
));
315 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
317 printf("Unable to update property %s:%s, err=%s\n",
318 path
, prop
, fdt_strerror(rc
));
321 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
324 fdt32_t tmp
= cpu_to_fdt32(val
);
325 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
328 void do_fixup_by_prop(void *fdt
,
329 const char *pname
, const void *pval
, int plen
,
330 const char *prop
, const void *val
, int len
,
336 debug("Updating property '%s' = ", prop
);
337 for (i
= 0; i
< len
; i
++)
338 debug(" %.2x", *(u8
*)(val
+i
));
341 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
342 while (off
!= -FDT_ERR_NOTFOUND
) {
343 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
344 fdt_setprop(fdt
, off
, prop
, val
, len
);
345 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
349 void do_fixup_by_prop_u32(void *fdt
,
350 const char *pname
, const void *pval
, int plen
,
351 const char *prop
, u32 val
, int create
)
353 fdt32_t tmp
= cpu_to_fdt32(val
);
354 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
357 void do_fixup_by_compat(void *fdt
, const char *compat
,
358 const char *prop
, const void *val
, int len
, int create
)
363 debug("Updating property '%s' = ", prop
);
364 for (i
= 0; i
< len
; i
++)
365 debug(" %.2x", *(u8
*)(val
+i
));
368 off
= fdt_node_offset_by_compatible(fdt
, -1, compat
);
369 while (off
!= -FDT_ERR_NOTFOUND
) {
370 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
371 fdt_setprop(fdt
, off
, prop
, val
, len
);
372 off
= fdt_node_offset_by_compatible(fdt
, off
, compat
);
376 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
377 const char *prop
, u32 val
, int create
)
379 fdt32_t tmp
= cpu_to_fdt32(val
);
380 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
383 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
385 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
387 static int fdt_pack_reg(const void *fdt
, void *buf
, u64
*address
, u64
*size
,
391 int address_cells
= fdt_address_cells(fdt
, 0);
392 int size_cells
= fdt_size_cells(fdt
, 0);
395 for (i
= 0; i
< n
; i
++) {
396 if (address_cells
== 2)
397 *(fdt64_t
*)p
= cpu_to_fdt64(address
[i
]);
399 *(fdt32_t
*)p
= cpu_to_fdt32(address
[i
]);
400 p
+= 4 * address_cells
;
403 *(fdt64_t
*)p
= cpu_to_fdt64(size
[i
]);
405 *(fdt32_t
*)p
= cpu_to_fdt32(size
[i
]);
409 return p
- (char *)buf
;
412 #if CONFIG_NR_DRAM_BANKS > 4
413 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
415 #define MEMORY_BANKS_MAX 4
417 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
421 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
423 if (banks
> MEMORY_BANKS_MAX
) {
424 printf("%s: num banks %d exceeds hardcoded limit %d."
425 " Recompile with higher MEMORY_BANKS_MAX?\n",
426 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
430 err
= fdt_check_header(blob
);
432 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
436 /* find or create "/memory" node. */
437 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
441 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
444 printf("WARNING: could not set %s %s.\n", "device_type",
449 for (i
= 0; i
< banks
; i
++) {
450 if (start
[i
] == 0 && size
[i
] == 0)
459 len
= fdt_pack_reg(blob
, tmp
, start
, size
, banks
);
461 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
463 printf("WARNING: could not set %s %s.\n",
464 "reg", fdt_strerror(err
));
471 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
473 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
476 void fdt_fixup_ethernet(void *fdt
)
482 unsigned char mac_addr
[ARP_HLEN
];
484 #ifdef FDT_SEQ_MACADDR_FROM_ENV
486 const struct fdt_property
*fdt_prop
;
489 if (fdt_path_offset(fdt
, "/aliases") < 0)
492 /* Cycle through all aliases */
493 for (prop
= 0; ; prop
++) {
496 /* FDT might have been edited, recompute the offset */
497 offset
= fdt_first_property_offset(fdt
,
498 fdt_path_offset(fdt
, "/aliases"));
499 /* Select property number 'prop' */
500 for (j
= 0; j
< prop
; j
++)
501 offset
= fdt_next_property_offset(fdt
, offset
);
506 path
= fdt_getprop_by_offset(fdt
, offset
, &name
, NULL
);
507 if (!strncmp(name
, "ethernet", 8)) {
508 /* Treat plain "ethernet" same as "ethernet0". */
509 if (!strcmp(name
, "ethernet")
510 #ifdef FDT_SEQ_MACADDR_FROM_ENV
511 || !strcmp(name
, "ethernet0")
515 #ifndef FDT_SEQ_MACADDR_FROM_ENV
517 i
= trailing_strtol(name
);
521 strcpy(mac
, "ethaddr");
523 sprintf(mac
, "eth%daddr", i
);
527 #ifdef FDT_SEQ_MACADDR_FROM_ENV
528 nodeoff
= fdt_path_offset(fdt
, path
);
529 fdt_prop
= fdt_get_property(fdt
, nodeoff
, "status",
531 if (fdt_prop
&& !strcmp(fdt_prop
->data
, "disabled"))
539 for (j
= 0; j
< 6; j
++) {
541 simple_strtoul(tmp
, &end
, 16) : 0;
543 tmp
= (*end
) ? end
+ 1 : end
;
546 do_fixup_by_path(fdt
, path
, "mac-address",
548 do_fixup_by_path(fdt
, path
, "local-mac-address",
554 int fdt_record_loadable(void *blob
, u32 index
, const char *name
,
555 uintptr_t load_addr
, u32 size
, uintptr_t entry_point
,
556 const char *type
, const char *os
)
560 err
= fdt_check_header(blob
);
562 printf("%s: %s\n", __func__
, fdt_strerror(err
));
566 /* find or create "/fit-images" node */
567 node
= fdt_find_or_add_subnode(blob
, 0, "fit-images");
571 /* find or create "/fit-images/<name>" node */
572 node
= fdt_find_or_add_subnode(blob
, node
, name
);
577 * We record these as 32bit entities, possibly truncating addresses.
578 * However, spl_fit.c is not 64bit safe either: i.e. we should not
579 * have an issue here.
581 fdt_setprop_u32(blob
, node
, "load-addr", load_addr
);
582 if (entry_point
!= -1)
583 fdt_setprop_u32(blob
, node
, "entry-point", entry_point
);
584 fdt_setprop_u32(blob
, node
, "size", size
);
586 fdt_setprop_string(blob
, node
, "type", type
);
588 fdt_setprop_string(blob
, node
, "os", os
);
593 /* Resize the fdt to its actual size + a bit of padding */
594 int fdt_shrink_to_minimum(void *blob
, uint extrasize
)
605 total
= fdt_num_mem_rsv(blob
);
606 for (i
= 0; i
< total
; i
++) {
607 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
608 if (addr
== (uintptr_t)blob
) {
609 fdt_del_mem_rsv(blob
, i
);
616 * Calculate the actual size of the fdt
617 * plus the size needed for 5 fdt_add_mem_rsv, one
618 * for the fdt itself and 4 for a possible initrd
619 * ((initrd-start + initrd-end) * 2 (name & value))
621 actualsize
= fdt_off_dt_strings(blob
) +
622 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
624 actualsize
+= extrasize
;
625 /* Make it so the fdt ends on a page boundary */
626 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
627 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
629 /* Change the fdt header to reflect the correct size */
630 fdt_set_totalsize(blob
, actualsize
);
633 /* Add the new reservation */
634 ret
= fdt_add_mem_rsv(blob
, map_to_sysmem(blob
), actualsize
);
643 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
645 #define FDT_PCI_PREFETCH (0x40000000)
646 #define FDT_PCI_MEM32 (0x02000000)
647 #define FDT_PCI_IO (0x01000000)
648 #define FDT_PCI_MEM64 (0x03000000)
650 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
652 int addrcell
, sizecell
, len
, r
;
654 /* sized based on pci addr cells, size-cells, & address-cells */
655 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
657 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
658 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
660 dma_range
= &dma_ranges
[0];
661 for (r
= 0; r
< hose
->region_count
; r
++) {
662 u64 bus_start
, phys_start
, size
;
664 /* skip if !PCI_REGION_SYS_MEMORY */
665 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
668 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
669 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
670 size
= (u64
)hose
->regions
[r
].size
;
673 if (size
>= 0x100000000ull
)
674 dma_range
[0] |= FDT_PCI_MEM64
;
676 dma_range
[0] |= FDT_PCI_MEM32
;
677 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
678 dma_range
[0] |= FDT_PCI_PREFETCH
;
679 #ifdef CONFIG_SYS_PCI_64BIT
680 dma_range
[1] = bus_start
>> 32;
684 dma_range
[2] = bus_start
& 0xffffffff;
687 dma_range
[3] = phys_start
>> 32;
688 dma_range
[4] = phys_start
& 0xffffffff;
690 dma_range
[3] = phys_start
& 0xffffffff;
694 dma_range
[3 + addrcell
+ 0] = size
>> 32;
695 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
697 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
700 dma_range
+= (3 + addrcell
+ sizecell
);
703 len
= dma_range
- &dma_ranges
[0];
705 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
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>
725 static int fdt_del_subnodes(const void *blob
, int parent_offset
)
730 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
731 (off
>= 0) && (ndepth
> 0);
732 off
= fdt_next_node(blob
, off
, &ndepth
)) {
734 debug("delete %s: offset: %x\n",
735 fdt_get_name(blob
, off
, 0), off
);
736 ret
= fdt_del_node((void *)blob
, off
);
738 printf("Can't delete node: %s\n",
750 static int fdt_del_partitions(void *blob
, int parent_offset
)
757 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
758 if (off
> 0 && ndepth
== 1) {
759 prop
= fdt_getprop(blob
, off
, "label", NULL
);
762 * Could not find label property, nand {}; node?
763 * Check subnode, delete partitions there if any.
765 return fdt_del_partitions(blob
, off
);
767 ret
= fdt_del_subnodes(blob
, parent_offset
);
769 printf("Can't remove subnodes: %s\n",
778 int fdt_node_set_part_info(void *blob
, int parent_offset
,
779 struct mtd_device
*dev
)
781 struct list_head
*pentry
;
782 struct part_info
*part
;
788 ret
= fdt_del_partitions(blob
, parent_offset
);
793 * Check if size/address is 1 or 2 cells.
794 * We assume #address-cells and #size-cells have same value.
796 sizecell
= fdt_getprop_u32_default_node(blob
, parent_offset
,
797 0, "#size-cells", 1);
800 * Check if it is nand {}; subnode, adjust
801 * the offset in this case
803 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
804 if (off
> 0 && ndepth
== 1)
808 list_for_each_prev(pentry
, &dev
->parts
) {
811 part
= list_entry(pentry
, struct part_info
, link
);
813 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
814 part_num
, part
->name
, part
->size
,
815 part
->offset
, part
->mask_flags
);
817 sprintf(buf
, "partition@%llx", part
->offset
);
819 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
820 if (ret
== -FDT_ERR_NOSPACE
) {
821 ret
= fdt_increase_size(blob
, 512);
826 } else if (ret
< 0) {
827 printf("Can't add partition node: %s\n",
833 /* Check MTD_WRITEABLE_CMD flag */
834 if (part
->mask_flags
& 1) {
836 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
837 if (ret
== -FDT_ERR_NOSPACE
) {
838 ret
= fdt_increase_size(blob
, 512);
849 ret
= fdt_setprop_u64(blob
, newoff
,
850 "reg", part
->offset
);
852 ret
= fdt_appendprop_u64(blob
, newoff
,
855 ret
= fdt_setprop_u32(blob
, newoff
,
856 "reg", part
->offset
);
858 ret
= fdt_appendprop_u32(blob
, newoff
,
862 if (ret
== -FDT_ERR_NOSPACE
) {
863 ret
= fdt_increase_size(blob
, 512);
872 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
873 if (ret
== -FDT_ERR_NOSPACE
) {
874 ret
= fdt_increase_size(blob
, 512);
886 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
889 printf("Can't add property: %s\n", fdt_strerror(ret
));
894 * Update partitions in nor/nand nodes using info from
895 * mtdparts environment variable. The nodes to update are
896 * specified by node_info structure which contains mtd device
897 * type and compatible string: E. g. the board code in
898 * ft_board_setup() could use:
900 * struct node_info nodes[] = {
901 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
902 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
905 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
907 void fdt_fixup_mtdparts(void *blob
, const struct node_info
*node_info
,
910 struct mtd_device
*dev
;
914 if (mtdparts_init() != 0)
917 for (i
= 0; i
< node_info_size
; i
++) {
919 noff
= fdt_node_offset_by_compatible(blob
, -1,
920 node_info
[i
].compat
);
921 while (noff
!= -FDT_ERR_NOTFOUND
) {
922 debug("%s: %s, mtd dev type %d\n",
923 fdt_get_name(blob
, noff
, 0),
924 node_info
[i
].compat
, node_info
[i
].type
);
925 dev
= device_find(node_info
[i
].type
, idx
++);
927 if (fdt_node_set_part_info(blob
, noff
, dev
))
928 return; /* return on error */
931 /* Jump to next flash node */
932 noff
= fdt_node_offset_by_compatible(blob
, noff
,
933 node_info
[i
].compat
);
939 void fdt_del_node_and_alias(void *blob
, const char *alias
)
941 int off
= fdt_path_offset(blob
, alias
);
946 fdt_del_node(blob
, off
);
948 off
= fdt_path_offset(blob
, "/aliases");
949 fdt_delprop(blob
, off
, alias
);
952 /* Max address size we deal with */
953 #define OF_MAX_ADDR_CELLS 4
954 #define OF_BAD_ADDR FDT_ADDR_T_NONE
955 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
960 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
964 printf(" %08x", *(addr
++));
968 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
972 * struct of_bus - Callbacks for bus specific translators
973 * @name: A string used to identify this bus in debug output.
974 * @addresses: The name of the DT property from which addresses are
975 * to be read, typically "reg".
976 * @match: Return non-zero if the node whose parent is at
977 * parentoffset in the FDT blob corresponds to a bus
978 * of this type, otherwise return zero. If NULL a match
980 * @count_cells:Count how many cells (be32 values) a node whose parent
981 * is at parentoffset in the FDT blob will require to
982 * represent its address (written to *addrc) & size
983 * (written to *sizec).
984 * @map: Map the address addr from the address space of this
985 * bus to that of its parent, making use of the ranges
986 * read from DT to an array at range. na and ns are the
987 * number of cells (be32 values) used to hold and address
988 * or size, respectively, for this bus. pna is the number
989 * of cells used to hold an address for the parent bus.
990 * Returns the address in the address space of the parent
992 * @translate: Update the value of the address cells at addr within an
993 * FDT by adding offset to it. na specifies the number of
994 * cells used to hold the address being translated. Returns
995 * zero on success, non-zero on error.
997 * Each bus type will include a struct of_bus in the of_busses array,
998 * providing implementations of some or all of the functions used to
999 * match the bus & handle address translation for its children.
1003 const char *addresses
;
1004 int (*match
)(const void *blob
, int parentoffset
);
1005 void (*count_cells
)(const void *blob
, int parentoffset
,
1006 int *addrc
, int *sizec
);
1007 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
1008 int na
, int ns
, int pna
);
1009 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
1012 /* Default translator (generic bus) */
1013 void fdt_support_default_count_cells(const void *blob
, int parentoffset
,
1014 int *addrc
, int *sizec
)
1016 const fdt32_t
*prop
;
1019 *addrc
= fdt_address_cells(blob
, parentoffset
);
1022 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
1024 *sizec
= be32_to_cpup(prop
);
1030 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
1031 int na
, int ns
, int pna
)
1035 cp
= fdt_read_number(range
, na
);
1036 s
= fdt_read_number(range
+ na
+ pna
, ns
);
1037 da
= fdt_read_number(addr
, na
);
1039 debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp
, s
, da
);
1041 if (da
< cp
|| da
>= (cp
+ s
))
1046 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
1048 u64 a
= fdt_read_number(addr
, na
);
1049 memset(addr
, 0, na
* 4);
1052 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
1053 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
1058 #ifdef CONFIG_OF_ISA_BUS
1060 /* ISA bus translator */
1061 static int of_bus_isa_match(const void *blob
, int parentoffset
)
1065 name
= fdt_get_name(blob
, parentoffset
, NULL
);
1069 return !strcmp(name
, "isa");
1072 static void of_bus_isa_count_cells(const void *blob
, int parentoffset
,
1073 int *addrc
, int *sizec
)
1081 static u64
of_bus_isa_map(fdt32_t
*addr
, const fdt32_t
*range
,
1082 int na
, int ns
, int pna
)
1086 /* Check address type match */
1087 if ((addr
[0] ^ range
[0]) & cpu_to_be32(1))
1090 cp
= fdt_read_number(range
+ 1, na
- 1);
1091 s
= fdt_read_number(range
+ na
+ pna
, ns
);
1092 da
= fdt_read_number(addr
+ 1, na
- 1);
1094 debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp
, s
, da
);
1096 if (da
< cp
|| da
>= (cp
+ s
))
1101 static int of_bus_isa_translate(fdt32_t
*addr
, u64 offset
, int na
)
1103 return of_bus_default_translate(addr
+ 1, offset
, na
- 1);
1106 #endif /* CONFIG_OF_ISA_BUS */
1108 /* Array of bus specific translators */
1109 static struct of_bus of_busses
[] = {
1110 #ifdef CONFIG_OF_ISA_BUS
1115 .match
= of_bus_isa_match
,
1116 .count_cells
= of_bus_isa_count_cells
,
1117 .map
= of_bus_isa_map
,
1118 .translate
= of_bus_isa_translate
,
1120 #endif /* CONFIG_OF_ISA_BUS */
1125 .count_cells
= fdt_support_default_count_cells
,
1126 .map
= of_bus_default_map
,
1127 .translate
= of_bus_default_translate
,
1131 static struct of_bus
*of_match_bus(const void *blob
, int parentoffset
)
1135 if (ARRAY_SIZE(of_busses
) == 1)
1138 for (bus
= of_busses
; bus
; bus
++) {
1139 if (!bus
->match
|| bus
->match(blob
, parentoffset
))
1144 * We should always have matched the default bus at least, since
1145 * it has a NULL match field. If we didn't then it somehow isn't
1146 * in the of_busses array or something equally catastrophic has
1153 static int of_translate_one(const void *blob
, int parent
, struct of_bus
*bus
,
1154 struct of_bus
*pbus
, fdt32_t
*addr
,
1155 int na
, int ns
, int pna
, const char *rprop
)
1157 const fdt32_t
*ranges
;
1160 u64 offset
= OF_BAD_ADDR
;
1162 /* Normally, an absence of a "ranges" property means we are
1163 * crossing a non-translatable boundary, and thus the addresses
1164 * below the current not cannot be converted to CPU physical ones.
1165 * Unfortunately, while this is very clear in the spec, it's not
1166 * what Apple understood, and they do have things like /uni-n or
1167 * /ht nodes with no "ranges" property and a lot of perfectly
1168 * useable mapped devices below them. Thus we treat the absence of
1169 * "ranges" as equivalent to an empty "ranges" property which means
1170 * a 1:1 translation at that level. It's up to the caller not to try
1171 * to translate addresses that aren't supposed to be translated in
1172 * the first place. --BenH.
1174 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1175 if (ranges
== NULL
|| rlen
== 0) {
1176 offset
= fdt_read_number(addr
, na
);
1177 memset(addr
, 0, pna
* 4);
1178 debug("OF: no ranges, 1:1 translation\n");
1182 debug("OF: walking ranges...\n");
1184 /* Now walk through the ranges */
1186 rone
= na
+ pna
+ ns
;
1187 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1188 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1189 if (offset
!= OF_BAD_ADDR
)
1192 if (offset
== OF_BAD_ADDR
) {
1193 debug("OF: not found !\n");
1196 memcpy(addr
, ranges
+ na
, 4 * pna
);
1199 of_dump_addr("OF: parent translation for:", addr
, pna
);
1200 debug("OF: with offset: %llu\n", offset
);
1202 /* Translate it into parent bus space */
1203 return pbus
->translate(addr
, offset
, pna
);
1207 * Translate an address from the device-tree into a CPU physical address,
1208 * this walks up the tree and applies the various bus mappings on the
1211 * Note: We consider that crossing any level with #size-cells == 0 to mean
1212 * that translation is impossible (that is we are not dealing with a value
1213 * that can be mapped to a cpu physical address). This is not really specified
1214 * that way, but this is traditionally the way IBM at least do things
1216 static u64
__of_translate_address(const void *blob
, int node_offset
,
1217 const fdt32_t
*in_addr
, const char *rprop
)
1220 struct of_bus
*bus
, *pbus
;
1221 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1222 int na
, ns
, pna
, pns
;
1223 u64 result
= OF_BAD_ADDR
;
1225 debug("OF: ** translation for device %s **\n",
1226 fdt_get_name(blob
, node_offset
, NULL
));
1228 /* Get parent & match bus type */
1229 parent
= fdt_parent_offset(blob
, node_offset
);
1232 bus
= of_match_bus(blob
, parent
);
1234 /* Cound address cells & copy address locally */
1235 bus
->count_cells(blob
, parent
, &na
, &ns
);
1236 if (!OF_CHECK_COUNTS(na
, ns
)) {
1237 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1238 fdt_get_name(blob
, node_offset
, NULL
));
1241 memcpy(addr
, in_addr
, na
* 4);
1243 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1244 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1245 of_dump_addr("OF: translating address:", addr
, na
);
1249 /* Switch to parent bus */
1250 node_offset
= parent
;
1251 parent
= fdt_parent_offset(blob
, node_offset
);
1253 /* If root, we have finished */
1255 debug("OF: reached root node\n");
1256 result
= fdt_read_number(addr
, na
);
1260 /* Get new parent bus and counts */
1261 pbus
= of_match_bus(blob
, parent
);
1262 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1263 if (!OF_CHECK_COUNTS(pna
, pns
)) {
1264 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1265 fdt_get_name(blob
, node_offset
, NULL
));
1269 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1270 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1272 /* Apply bus translation */
1273 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1274 addr
, na
, ns
, pna
, rprop
))
1277 /* Complete the move up one level */
1282 of_dump_addr("OF: one level translation:", addr
, na
);
1289 u64
fdt_translate_address(const void *blob
, int node_offset
,
1290 const fdt32_t
*in_addr
)
1292 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1296 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1297 * who's reg property matches a physical cpu address
1299 * @blob: ptr to device tree
1300 * @compat: compatiable string to match
1301 * @compat_off: property name
1304 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1305 phys_addr_t compat_off
)
1307 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1308 while (off
!= -FDT_ERR_NOTFOUND
) {
1309 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1311 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1314 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1317 return -FDT_ERR_NOTFOUND
;
1321 * fdt_alloc_phandle: Return next free phandle value
1323 * @blob: ptr to device tree
1325 int fdt_alloc_phandle(void *blob
)
1328 uint32_t phandle
= 0;
1330 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1331 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1332 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1339 * fdt_set_phandle: Create a phandle property for the given node
1341 * @fdt: ptr to device tree
1342 * @nodeoffset: node to update
1343 * @phandle: phandle value to set (must be unique)
1345 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1350 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1352 if ((off
>= 0) && (off
!= nodeoffset
)) {
1355 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1356 printf("Trying to update node %s with phandle %u ",
1359 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1360 printf("that already exists in node %s.\n", buf
);
1361 return -FDT_ERR_BADPHANDLE
;
1365 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1370 * For now, also set the deprecated "linux,phandle" property, so that we
1371 * don't break older kernels.
1373 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1379 * fdt_create_phandle: Create a phandle property for the given node
1381 * @fdt: ptr to device tree
1382 * @nodeoffset: node to update
1384 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1386 /* see if there is a phandle already */
1387 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1389 /* if we got 0, means no phandle so create one */
1393 phandle
= fdt_alloc_phandle(fdt
);
1394 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1396 printf("Can't set phandle %u: %s\n", phandle
,
1406 * fdt_set_node_status: Set status for the given node
1408 * @fdt: ptr to device tree
1409 * @nodeoffset: node to update
1410 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1411 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1412 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1414 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1415 enum fdt_status status
, unsigned int error_code
)
1424 case FDT_STATUS_OKAY
:
1425 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1427 case FDT_STATUS_DISABLED
:
1428 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1430 case FDT_STATUS_FAIL
:
1431 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1433 case FDT_STATUS_FAIL_ERROR_CODE
:
1434 sprintf(buf
, "fail-%d", error_code
);
1435 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1438 printf("Invalid fdt status: %x\n", status
);
1447 * fdt_set_status_by_alias: Set status for the given node given an alias
1449 * @fdt: ptr to device tree
1450 * @alias: alias of node to update
1451 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1452 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1453 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1455 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1456 enum fdt_status status
, unsigned int error_code
)
1458 int offset
= fdt_path_offset(fdt
, alias
);
1460 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1463 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1464 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1469 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1470 if (noff
!= -FDT_ERR_NOTFOUND
) {
1471 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1473 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1474 if (ret
== -FDT_ERR_NOSPACE
) {
1475 ret
= fdt_increase_size(blob
, 512);
1480 } else if (ret
< 0) {
1481 printf("Can't add property: %s\n", fdt_strerror(ret
));
1487 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1493 * Verify the physical address of device tree node for a given alias
1495 * This function locates the device tree node of a given alias, and then
1496 * verifies that the physical address of that device matches the given
1497 * parameter. It displays a message if there is a mismatch.
1499 * Returns 1 on success, 0 on failure
1501 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1508 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1510 /* If there's no such alias, then it's not a failure */
1514 node
= fdt_path_offset(fdt
, path
);
1516 printf("Warning: device tree alias '%s' points to invalid "
1517 "node %s.\n", alias
, path
);
1521 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1523 printf("Warning: device tree node '%s' has no address.\n",
1528 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1529 if (addr
!= dt_addr
) {
1530 printf("Warning: U-Boot configured device %s at address %llu,\n"
1531 "but the device tree has it address %llx.\n",
1532 alias
, addr
, dt_addr
);
1540 * Returns the base address of an SOC or PCI node
1542 u64
fdt_get_base_address(const void *fdt
, int node
)
1545 const fdt32_t
*prop
;
1547 prop
= fdt_getprop(fdt
, node
, "reg", &size
);
1549 return prop
? fdt_translate_address(fdt
, node
, prop
) : 0;
1553 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1555 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1556 uint64_t *val
, int cells
)
1558 const fdt32_t
*prop32
= &prop
[cell_off
];
1559 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1561 if ((cell_off
+ cells
) > prop_len
)
1562 return -FDT_ERR_NOSPACE
;
1566 *val
= fdt32_to_cpu(*prop32
);
1569 *val
= fdt64_to_cpu(*prop64
);
1572 return -FDT_ERR_NOSPACE
;
1579 * fdt_read_range - Read a node's n'th range property
1581 * @fdt: ptr to device tree
1582 * @node: offset of node
1584 * @child_addr: pointer to storage for the "child address" field
1585 * @addr: pointer to storage for the CPU view translated physical start
1586 * @len: pointer to storage for the range length
1588 * Convenience function that reads and interprets a specific range out of
1589 * a number of the "ranges" property array.
1591 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1592 uint64_t *addr
, uint64_t *len
)
1594 int pnode
= fdt_parent_offset(fdt
, node
);
1595 const fdt32_t
*ranges
;
1604 * The "ranges" property is an array of
1605 * { <child address> <parent address> <size in child address space> }
1607 * All 3 elements can span a diffent number of cells. Fetch their size.
1609 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1610 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1611 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1613 /* Now try to get the ranges property */
1614 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1616 return -FDT_ERR_NOTFOUND
;
1617 ranges_len
/= sizeof(uint32_t);
1619 /* Jump to the n'th entry */
1620 cell
= n
* (pacells
+ acells
+ scells
);
1622 /* Read <child address> */
1624 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1631 /* Read <parent address> */
1633 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1636 /* Read <size in child address space> */
1638 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);
1647 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1649 * @fdt: ptr to device tree
1650 * @node: offset of the simplefb node
1651 * @base_address: framebuffer base address
1652 * @width: width in pixels
1653 * @height: height in pixels
1654 * @stride: bytes per line
1655 * @format: pixel format string
1657 * Convenience function to fill and enable a simplefb node.
1659 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
1660 u32 height
, u32 stride
, const char *format
)
1664 int i
, addrc
, sizec
, ret
;
1666 fdt_support_default_count_cells(fdt
, fdt_parent_offset(fdt
, node
),
1670 cells
[i
++] = cpu_to_fdt32(base_address
>> 32);
1671 cells
[i
++] = cpu_to_fdt32(base_address
);
1674 cells
[i
++] = cpu_to_fdt32(height
* stride
);
1676 ret
= fdt_setprop(fdt
, node
, "reg", cells
, sizeof(cells
[0]) * i
);
1680 snprintf(name
, sizeof(name
), "framebuffer@%llx", base_address
);
1681 ret
= fdt_set_name(fdt
, node
, name
);
1685 ret
= fdt_setprop_u32(fdt
, node
, "width", width
);
1689 ret
= fdt_setprop_u32(fdt
, node
, "height", height
);
1693 ret
= fdt_setprop_u32(fdt
, node
, "stride", stride
);
1697 ret
= fdt_setprop_string(fdt
, node
, "format", format
);
1701 ret
= fdt_setprop_string(fdt
, node
, "status", "okay");
1709 * Update native-mode in display-timings from display environment variable.
1710 * The node to update are specified by path.
1712 int fdt_fixup_display(void *blob
, const char *path
, const char *display
)
1716 if (!display
|| !path
)
1717 return -FDT_ERR_NOTFOUND
;
1719 toff
= fdt_path_offset(blob
, path
);
1721 toff
= fdt_subnode_offset(blob
, toff
, "display-timings");
1725 for (off
= fdt_first_subnode(blob
, toff
);
1727 off
= fdt_next_subnode(blob
, off
)) {
1728 uint32_t h
= fdt_get_phandle(blob
, off
);
1729 debug("%s:0x%x\n", fdt_get_name(blob
, off
, NULL
),
1731 if (strcasecmp(fdt_get_name(blob
, off
, NULL
), display
) == 0)
1732 return fdt_setprop_u32(blob
, toff
, "native-mode", h
);
1737 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1739 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
1741 * @fdt: ptr to device tree
1742 * @fdto: ptr to device tree overlay
1744 * Convenience function to apply an overlay and display helpful messages
1745 * in the case of an error
1747 int fdt_overlay_apply_verbose(void *fdt
, void *fdto
)
1752 err
= fdt_path_offset(fdt
, "/__symbols__");
1753 has_symbols
= err
>= 0;
1755 err
= fdt_overlay_apply(fdt
, fdto
);
1757 printf("failed on fdt_overlay_apply(): %s\n",
1760 printf("base fdt does did not have a /__symbols__ node\n");
1761 printf("make sure you've compiled with -@\n");