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
= env_get("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
= env_get("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 int fdt_record_loadable(void *blob
, u32 index
, const char *name
,
414 uintptr_t load_addr
, u32 size
, uintptr_t entry_point
,
415 const char *type
, const char *os
)
419 err
= fdt_check_header(blob
);
421 printf("%s: %s\n", __func__
, fdt_strerror(err
));
425 /* find or create "/fit-images" node */
426 node
= fdt_find_or_add_subnode(blob
, 0, "fit-images");
430 /* find or create "/fit-images/<name>" node */
431 node
= fdt_find_or_add_subnode(blob
, node
, name
);
436 * We record these as 32bit entities, possibly truncating addresses.
437 * However, spl_fit.c is not 64bit safe either: i.e. we should not
438 * have an issue here.
440 fdt_setprop_u32(blob
, node
, "load-addr", load_addr
);
441 if (entry_point
!= -1)
442 fdt_setprop_u32(blob
, node
, "entry-point", entry_point
);
443 fdt_setprop_u32(blob
, node
, "size", size
);
445 fdt_setprop_string(blob
, node
, "type", type
);
447 fdt_setprop_string(blob
, node
, "os", os
);
452 #ifdef CONFIG_NR_DRAM_BANKS
453 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
455 #define MEMORY_BANKS_MAX 4
457 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
461 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
463 if (banks
> MEMORY_BANKS_MAX
) {
464 printf("%s: num banks %d exceeds hardcoded limit %d."
465 " Recompile with higher MEMORY_BANKS_MAX?\n",
466 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
470 err
= fdt_check_header(blob
);
472 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
476 /* find or create "/memory" node. */
477 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
481 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
484 printf("WARNING: could not set %s %s.\n", "device_type",
492 len
= fdt_pack_reg(blob
, tmp
, start
, size
, banks
);
494 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
496 printf("WARNING: could not set %s %s.\n",
497 "reg", fdt_strerror(err
));
504 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
506 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
509 void fdt_fixup_ethernet(void *fdt
)
515 unsigned char mac_addr
[ARP_HLEN
];
517 #ifdef FDT_SEQ_MACADDR_FROM_ENV
519 const struct fdt_property
*fdt_prop
;
522 if (fdt_path_offset(fdt
, "/aliases") < 0)
525 /* Cycle through all aliases */
526 for (prop
= 0; ; prop
++) {
529 /* FDT might have been edited, recompute the offset */
530 offset
= fdt_first_property_offset(fdt
,
531 fdt_path_offset(fdt
, "/aliases"));
532 /* Select property number 'prop' */
533 for (j
= 0; j
< prop
; j
++)
534 offset
= fdt_next_property_offset(fdt
, offset
);
539 path
= fdt_getprop_by_offset(fdt
, offset
, &name
, NULL
);
540 if (!strncmp(name
, "ethernet", 8)) {
541 /* Treat plain "ethernet" same as "ethernet0". */
542 if (!strcmp(name
, "ethernet")
543 #ifdef FDT_SEQ_MACADDR_FROM_ENV
544 || !strcmp(name
, "ethernet0")
548 #ifndef FDT_SEQ_MACADDR_FROM_ENV
550 i
= trailing_strtol(name
);
554 strcpy(mac
, "ethaddr");
556 sprintf(mac
, "eth%daddr", i
);
560 #ifdef FDT_SEQ_MACADDR_FROM_ENV
561 nodeoff
= fdt_path_offset(fdt
, path
);
562 fdt_prop
= fdt_get_property(fdt
, nodeoff
, "status",
564 if (fdt_prop
&& !strcmp(fdt_prop
->data
, "disabled"))
572 for (j
= 0; j
< 6; j
++) {
574 simple_strtoul(tmp
, &end
, 16) : 0;
576 tmp
= (*end
) ? end
+ 1 : end
;
579 do_fixup_by_path(fdt
, path
, "mac-address",
581 do_fixup_by_path(fdt
, path
, "local-mac-address",
587 /* Resize the fdt to its actual size + a bit of padding */
588 int fdt_shrink_to_minimum(void *blob
, uint extrasize
)
598 total
= fdt_num_mem_rsv(blob
);
599 for (i
= 0; i
< total
; i
++) {
600 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
601 if (addr
== (uintptr_t)blob
) {
602 fdt_del_mem_rsv(blob
, i
);
608 * Calculate the actual size of the fdt
609 * plus the size needed for 5 fdt_add_mem_rsv, one
610 * for the fdt itself and 4 for a possible initrd
611 * ((initrd-start + initrd-end) * 2 (name & value))
613 actualsize
= fdt_off_dt_strings(blob
) +
614 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
616 actualsize
+= extrasize
;
617 /* Make it so the fdt ends on a page boundary */
618 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
619 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
621 /* Change the fdt header to reflect the correct size */
622 fdt_set_totalsize(blob
, actualsize
);
624 /* Add the new reservation */
625 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
633 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
635 #define FDT_PCI_PREFETCH (0x40000000)
636 #define FDT_PCI_MEM32 (0x02000000)
637 #define FDT_PCI_IO (0x01000000)
638 #define FDT_PCI_MEM64 (0x03000000)
640 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
642 int addrcell
, sizecell
, len
, r
;
644 /* sized based on pci addr cells, size-cells, & address-cells */
645 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
647 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
648 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
650 dma_range
= &dma_ranges
[0];
651 for (r
= 0; r
< hose
->region_count
; r
++) {
652 u64 bus_start
, phys_start
, size
;
654 /* skip if !PCI_REGION_SYS_MEMORY */
655 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
658 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
659 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
660 size
= (u64
)hose
->regions
[r
].size
;
663 if (size
>= 0x100000000ull
)
664 dma_range
[0] |= FDT_PCI_MEM64
;
666 dma_range
[0] |= FDT_PCI_MEM32
;
667 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
668 dma_range
[0] |= FDT_PCI_PREFETCH
;
669 #ifdef CONFIG_SYS_PCI_64BIT
670 dma_range
[1] = bus_start
>> 32;
674 dma_range
[2] = bus_start
& 0xffffffff;
677 dma_range
[3] = phys_start
>> 32;
678 dma_range
[4] = phys_start
& 0xffffffff;
680 dma_range
[3] = phys_start
& 0xffffffff;
684 dma_range
[3 + addrcell
+ 0] = size
>> 32;
685 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
687 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
690 dma_range
+= (3 + addrcell
+ sizecell
);
693 len
= dma_range
- &dma_ranges
[0];
695 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
701 int fdt_increase_size(void *fdt
, int add_len
)
705 newlen
= fdt_totalsize(fdt
) + add_len
;
707 /* Open in place with a new len */
708 return fdt_open_into(fdt
, fdt
, newlen
);
711 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
712 #include <jffs2/load_kernel.h>
713 #include <mtd_node.h>
720 int fdt_del_subnodes(const void *blob
, int parent_offset
)
725 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
726 (off
>= 0) && (ndepth
> 0);
727 off
= fdt_next_node(blob
, off
, &ndepth
)) {
729 debug("delete %s: offset: %x\n",
730 fdt_get_name(blob
, off
, 0), off
);
731 ret
= fdt_del_node((void *)blob
, off
);
733 printf("Can't delete node: %s\n",
745 int fdt_del_partitions(void *blob
, int parent_offset
)
752 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
753 if (off
> 0 && ndepth
== 1) {
754 prop
= fdt_getprop(blob
, off
, "label", NULL
);
757 * Could not find label property, nand {}; node?
758 * Check subnode, delete partitions there if any.
760 return fdt_del_partitions(blob
, off
);
762 ret
= fdt_del_subnodes(blob
, parent_offset
);
764 printf("Can't remove subnodes: %s\n",
773 int fdt_node_set_part_info(void *blob
, int parent_offset
,
774 struct mtd_device
*dev
)
776 struct list_head
*pentry
;
777 struct part_info
*part
;
778 struct reg_cell cell
;
783 ret
= fdt_del_partitions(blob
, parent_offset
);
788 * Check if it is nand {}; subnode, adjust
789 * the offset in this case
791 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
792 if (off
> 0 && ndepth
== 1)
796 list_for_each_prev(pentry
, &dev
->parts
) {
799 part
= list_entry(pentry
, struct part_info
, link
);
801 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
802 part_num
, part
->name
, part
->size
,
803 part
->offset
, part
->mask_flags
);
805 sprintf(buf
, "partition@%llx", part
->offset
);
807 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
808 if (ret
== -FDT_ERR_NOSPACE
) {
809 ret
= fdt_increase_size(blob
, 512);
814 } else if (ret
< 0) {
815 printf("Can't add partition node: %s\n",
821 /* Check MTD_WRITEABLE_CMD flag */
822 if (part
->mask_flags
& 1) {
824 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
825 if (ret
== -FDT_ERR_NOSPACE
) {
826 ret
= fdt_increase_size(blob
, 512);
835 cell
.r0
= cpu_to_fdt32(part
->offset
);
836 cell
.r1
= cpu_to_fdt32(part
->size
);
838 ret
= fdt_setprop(blob
, newoff
, "reg", &cell
, sizeof(cell
));
839 if (ret
== -FDT_ERR_NOSPACE
) {
840 ret
= fdt_increase_size(blob
, 512);
849 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
850 if (ret
== -FDT_ERR_NOSPACE
) {
851 ret
= fdt_increase_size(blob
, 512);
863 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
866 printf("Can't add property: %s\n", fdt_strerror(ret
));
871 * Update partitions in nor/nand nodes using info from
872 * mtdparts environment variable. The nodes to update are
873 * specified by node_info structure which contains mtd device
874 * type and compatible string: E. g. the board code in
875 * ft_board_setup() could use:
877 * struct node_info nodes[] = {
878 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
879 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
882 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
884 void fdt_fixup_mtdparts(void *blob
, void *node_info
, int node_info_size
)
886 struct node_info
*ni
= node_info
;
887 struct mtd_device
*dev
;
891 if (mtdparts_init() != 0)
894 for (i
= 0; i
< node_info_size
; i
++) {
896 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
897 while (noff
!= -FDT_ERR_NOTFOUND
) {
898 debug("%s: %s, mtd dev type %d\n",
899 fdt_get_name(blob
, noff
, 0),
900 ni
[i
].compat
, ni
[i
].type
);
901 dev
= device_find(ni
[i
].type
, idx
++);
903 if (fdt_node_set_part_info(blob
, noff
, dev
))
904 return; /* return on error */
907 /* Jump to next flash node */
908 noff
= fdt_node_offset_by_compatible(blob
, noff
,
915 void fdt_del_node_and_alias(void *blob
, const char *alias
)
917 int off
= fdt_path_offset(blob
, alias
);
922 fdt_del_node(blob
, off
);
924 off
= fdt_path_offset(blob
, "/aliases");
925 fdt_delprop(blob
, off
, alias
);
928 /* Max address size we deal with */
929 #define OF_MAX_ADDR_CELLS 4
930 #define OF_BAD_ADDR FDT_ADDR_T_NONE
931 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
936 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
940 printf(" %08x", *(addr
++));
944 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
948 * struct of_bus - Callbacks for bus specific translators
949 * @name: A string used to identify this bus in debug output.
950 * @addresses: The name of the DT property from which addresses are
951 * to be read, typically "reg".
952 * @match: Return non-zero if the node whose parent is at
953 * parentoffset in the FDT blob corresponds to a bus
954 * of this type, otherwise return zero. If NULL a match
956 * @count_cells:Count how many cells (be32 values) a node whose parent
957 * is at parentoffset in the FDT blob will require to
958 * represent its address (written to *addrc) & size
959 * (written to *sizec).
960 * @map: Map the address addr from the address space of this
961 * bus to that of its parent, making use of the ranges
962 * read from DT to an array at range. na and ns are the
963 * number of cells (be32 values) used to hold and address
964 * or size, respectively, for this bus. pna is the number
965 * of cells used to hold an address for the parent bus.
966 * Returns the address in the address space of the parent
968 * @translate: Update the value of the address cells at addr within an
969 * FDT by adding offset to it. na specifies the number of
970 * cells used to hold the address being translated. Returns
971 * zero on success, non-zero on error.
973 * Each bus type will include a struct of_bus in the of_busses array,
974 * providing implementations of some or all of the functions used to
975 * match the bus & handle address translation for its children.
979 const char *addresses
;
980 int (*match
)(const void *blob
, int parentoffset
);
981 void (*count_cells
)(const void *blob
, int parentoffset
,
982 int *addrc
, int *sizec
);
983 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
984 int na
, int ns
, int pna
);
985 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
988 /* Default translator (generic bus) */
989 void fdt_support_default_count_cells(const void *blob
, int parentoffset
,
990 int *addrc
, int *sizec
)
995 *addrc
= fdt_address_cells(blob
, parentoffset
);
998 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
1000 *sizec
= be32_to_cpup(prop
);
1006 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
1007 int na
, int ns
, int pna
)
1011 cp
= fdt_read_number(range
, na
);
1012 s
= fdt_read_number(range
+ na
+ pna
, ns
);
1013 da
= fdt_read_number(addr
, na
);
1015 debug("OF: default map, cp=%" PRIu64
", s=%" PRIu64
1016 ", da=%" PRIu64
"\n", cp
, s
, da
);
1018 if (da
< cp
|| da
>= (cp
+ s
))
1023 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
1025 u64 a
= fdt_read_number(addr
, na
);
1026 memset(addr
, 0, na
* 4);
1029 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
1030 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
1035 #ifdef CONFIG_OF_ISA_BUS
1037 /* ISA bus translator */
1038 static int of_bus_isa_match(const void *blob
, int parentoffset
)
1042 name
= fdt_get_name(blob
, parentoffset
, NULL
);
1046 return !strcmp(name
, "isa");
1049 static void of_bus_isa_count_cells(const void *blob
, int parentoffset
,
1050 int *addrc
, int *sizec
)
1058 static u64
of_bus_isa_map(fdt32_t
*addr
, const fdt32_t
*range
,
1059 int na
, int ns
, int pna
)
1063 /* Check address type match */
1064 if ((addr
[0] ^ range
[0]) & cpu_to_be32(1))
1067 cp
= fdt_read_number(range
+ 1, na
- 1);
1068 s
= fdt_read_number(range
+ na
+ pna
, ns
);
1069 da
= fdt_read_number(addr
+ 1, na
- 1);
1071 debug("OF: ISA map, cp=%" PRIu64
", s=%" PRIu64
1072 ", da=%" PRIu64
"\n", cp
, s
, da
);
1074 if (da
< cp
|| da
>= (cp
+ s
))
1079 static int of_bus_isa_translate(fdt32_t
*addr
, u64 offset
, int na
)
1081 return of_bus_default_translate(addr
+ 1, offset
, na
- 1);
1084 #endif /* CONFIG_OF_ISA_BUS */
1086 /* Array of bus specific translators */
1087 static struct of_bus of_busses
[] = {
1088 #ifdef CONFIG_OF_ISA_BUS
1093 .match
= of_bus_isa_match
,
1094 .count_cells
= of_bus_isa_count_cells
,
1095 .map
= of_bus_isa_map
,
1096 .translate
= of_bus_isa_translate
,
1098 #endif /* CONFIG_OF_ISA_BUS */
1103 .count_cells
= fdt_support_default_count_cells
,
1104 .map
= of_bus_default_map
,
1105 .translate
= of_bus_default_translate
,
1109 static struct of_bus
*of_match_bus(const void *blob
, int parentoffset
)
1113 if (ARRAY_SIZE(of_busses
) == 1)
1116 for (bus
= of_busses
; bus
; bus
++) {
1117 if (!bus
->match
|| bus
->match(blob
, parentoffset
))
1122 * We should always have matched the default bus at least, since
1123 * it has a NULL match field. If we didn't then it somehow isn't
1124 * in the of_busses array or something equally catastrophic has
1131 static int of_translate_one(const void *blob
, int parent
, struct of_bus
*bus
,
1132 struct of_bus
*pbus
, fdt32_t
*addr
,
1133 int na
, int ns
, int pna
, const char *rprop
)
1135 const fdt32_t
*ranges
;
1138 u64 offset
= OF_BAD_ADDR
;
1140 /* Normally, an absence of a "ranges" property means we are
1141 * crossing a non-translatable boundary, and thus the addresses
1142 * below the current not cannot be converted to CPU physical ones.
1143 * Unfortunately, while this is very clear in the spec, it's not
1144 * what Apple understood, and they do have things like /uni-n or
1145 * /ht nodes with no "ranges" property and a lot of perfectly
1146 * useable mapped devices below them. Thus we treat the absence of
1147 * "ranges" as equivalent to an empty "ranges" property which means
1148 * a 1:1 translation at that level. It's up to the caller not to try
1149 * to translate addresses that aren't supposed to be translated in
1150 * the first place. --BenH.
1152 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1153 if (ranges
== NULL
|| rlen
== 0) {
1154 offset
= fdt_read_number(addr
, na
);
1155 memset(addr
, 0, pna
* 4);
1156 debug("OF: no ranges, 1:1 translation\n");
1160 debug("OF: walking ranges...\n");
1162 /* Now walk through the ranges */
1164 rone
= na
+ pna
+ ns
;
1165 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1166 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1167 if (offset
!= OF_BAD_ADDR
)
1170 if (offset
== OF_BAD_ADDR
) {
1171 debug("OF: not found !\n");
1174 memcpy(addr
, ranges
+ na
, 4 * pna
);
1177 of_dump_addr("OF: parent translation for:", addr
, pna
);
1178 debug("OF: with offset: %" PRIu64
"\n", offset
);
1180 /* Translate it into parent bus space */
1181 return pbus
->translate(addr
, offset
, pna
);
1185 * Translate an address from the device-tree into a CPU physical address,
1186 * this walks up the tree and applies the various bus mappings on the
1189 * Note: We consider that crossing any level with #size-cells == 0 to mean
1190 * that translation is impossible (that is we are not dealing with a value
1191 * that can be mapped to a cpu physical address). This is not really specified
1192 * that way, but this is traditionally the way IBM at least do things
1194 static u64
__of_translate_address(const void *blob
, int node_offset
,
1195 const fdt32_t
*in_addr
, const char *rprop
)
1198 struct of_bus
*bus
, *pbus
;
1199 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1200 int na
, ns
, pna
, pns
;
1201 u64 result
= OF_BAD_ADDR
;
1203 debug("OF: ** translation for device %s **\n",
1204 fdt_get_name(blob
, node_offset
, NULL
));
1206 /* Get parent & match bus type */
1207 parent
= fdt_parent_offset(blob
, node_offset
);
1210 bus
= of_match_bus(blob
, parent
);
1212 /* Cound address cells & copy address locally */
1213 bus
->count_cells(blob
, parent
, &na
, &ns
);
1214 if (!OF_CHECK_COUNTS(na
, ns
)) {
1215 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1216 fdt_get_name(blob
, node_offset
, NULL
));
1219 memcpy(addr
, in_addr
, na
* 4);
1221 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1222 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1223 of_dump_addr("OF: translating address:", addr
, na
);
1227 /* Switch to parent bus */
1228 node_offset
= parent
;
1229 parent
= fdt_parent_offset(blob
, node_offset
);
1231 /* If root, we have finished */
1233 debug("OF: reached root node\n");
1234 result
= fdt_read_number(addr
, na
);
1238 /* Get new parent bus and counts */
1239 pbus
= of_match_bus(blob
, parent
);
1240 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1241 if (!OF_CHECK_COUNTS(pna
, pns
)) {
1242 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1243 fdt_get_name(blob
, node_offset
, NULL
));
1247 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1248 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1250 /* Apply bus translation */
1251 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1252 addr
, na
, ns
, pna
, rprop
))
1255 /* Complete the move up one level */
1260 of_dump_addr("OF: one level translation:", addr
, na
);
1267 u64
fdt_translate_address(const void *blob
, int node_offset
,
1268 const fdt32_t
*in_addr
)
1270 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1274 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1275 * who's reg property matches a physical cpu address
1277 * @blob: ptr to device tree
1278 * @compat: compatiable string to match
1279 * @compat_off: property name
1282 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1283 phys_addr_t compat_off
)
1285 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1286 while (off
!= -FDT_ERR_NOTFOUND
) {
1287 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1289 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1292 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1295 return -FDT_ERR_NOTFOUND
;
1299 * fdt_alloc_phandle: Return next free phandle value
1301 * @blob: ptr to device tree
1303 int fdt_alloc_phandle(void *blob
)
1306 uint32_t phandle
= 0;
1308 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1309 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1310 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1317 * fdt_set_phandle: Create a phandle property for the given node
1319 * @fdt: ptr to device tree
1320 * @nodeoffset: node to update
1321 * @phandle: phandle value to set (must be unique)
1323 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1328 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1330 if ((off
>= 0) && (off
!= nodeoffset
)) {
1333 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1334 printf("Trying to update node %s with phandle %u ",
1337 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1338 printf("that already exists in node %s.\n", buf
);
1339 return -FDT_ERR_BADPHANDLE
;
1343 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1348 * For now, also set the deprecated "linux,phandle" property, so that we
1349 * don't break older kernels.
1351 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1357 * fdt_create_phandle: Create a phandle property for the given node
1359 * @fdt: ptr to device tree
1360 * @nodeoffset: node to update
1362 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1364 /* see if there is a phandle already */
1365 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1367 /* if we got 0, means no phandle so create one */
1371 phandle
= fdt_alloc_phandle(fdt
);
1372 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1374 printf("Can't set phandle %u: %s\n", phandle
,
1384 * fdt_set_node_status: Set status for the given node
1386 * @fdt: ptr to device tree
1387 * @nodeoffset: node to update
1388 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1389 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1390 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1392 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1393 enum fdt_status status
, unsigned int error_code
)
1402 case FDT_STATUS_OKAY
:
1403 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1405 case FDT_STATUS_DISABLED
:
1406 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1408 case FDT_STATUS_FAIL
:
1409 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1411 case FDT_STATUS_FAIL_ERROR_CODE
:
1412 sprintf(buf
, "fail-%d", error_code
);
1413 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1416 printf("Invalid fdt status: %x\n", status
);
1425 * fdt_set_status_by_alias: Set status for the given node given an alias
1427 * @fdt: ptr to device tree
1428 * @alias: alias of node to update
1429 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1430 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1431 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1433 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1434 enum fdt_status status
, unsigned int error_code
)
1436 int offset
= fdt_path_offset(fdt
, alias
);
1438 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1441 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1442 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1447 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1448 if (noff
!= -FDT_ERR_NOTFOUND
) {
1449 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1451 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1452 if (ret
== -FDT_ERR_NOSPACE
) {
1453 ret
= fdt_increase_size(blob
, 512);
1458 } else if (ret
< 0) {
1459 printf("Can't add property: %s\n", fdt_strerror(ret
));
1465 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1471 * Verify the physical address of device tree node for a given alias
1473 * This function locates the device tree node of a given alias, and then
1474 * verifies that the physical address of that device matches the given
1475 * parameter. It displays a message if there is a mismatch.
1477 * Returns 1 on success, 0 on failure
1479 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1486 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1488 /* If there's no such alias, then it's not a failure */
1492 node
= fdt_path_offset(fdt
, path
);
1494 printf("Warning: device tree alias '%s' points to invalid "
1495 "node %s.\n", alias
, path
);
1499 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1501 printf("Warning: device tree node '%s' has no address.\n",
1506 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1507 if (addr
!= dt_addr
) {
1508 printf("Warning: U-Boot configured device %s at address %"
1509 PRIx64
",\n but the device tree has it address %"
1510 PRIx64
".\n", alias
, addr
, dt_addr
);
1518 * Returns the base address of an SOC or PCI node
1520 u64
fdt_get_base_address(const void *fdt
, int node
)
1523 const fdt32_t
*prop
;
1525 prop
= fdt_getprop(fdt
, node
, "reg", &size
);
1527 return prop
? fdt_translate_address(fdt
, node
, prop
) : 0;
1531 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1533 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1534 uint64_t *val
, int cells
)
1536 const fdt32_t
*prop32
= &prop
[cell_off
];
1537 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1539 if ((cell_off
+ cells
) > prop_len
)
1540 return -FDT_ERR_NOSPACE
;
1544 *val
= fdt32_to_cpu(*prop32
);
1547 *val
= fdt64_to_cpu(*prop64
);
1550 return -FDT_ERR_NOSPACE
;
1557 * fdt_read_range - Read a node's n'th range property
1559 * @fdt: ptr to device tree
1560 * @node: offset of node
1562 * @child_addr: pointer to storage for the "child address" field
1563 * @addr: pointer to storage for the CPU view translated physical start
1564 * @len: pointer to storage for the range length
1566 * Convenience function that reads and interprets a specific range out of
1567 * a number of the "ranges" property array.
1569 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1570 uint64_t *addr
, uint64_t *len
)
1572 int pnode
= fdt_parent_offset(fdt
, node
);
1573 const fdt32_t
*ranges
;
1582 * The "ranges" property is an array of
1583 * { <child address> <parent address> <size in child address space> }
1585 * All 3 elements can span a diffent number of cells. Fetch their size.
1587 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1588 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1589 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1591 /* Now try to get the ranges property */
1592 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1594 return -FDT_ERR_NOTFOUND
;
1595 ranges_len
/= sizeof(uint32_t);
1597 /* Jump to the n'th entry */
1598 cell
= n
* (pacells
+ acells
+ scells
);
1600 /* Read <child address> */
1602 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1609 /* Read <parent address> */
1611 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1614 /* Read <size in child address space> */
1616 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);
1625 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1627 * @fdt: ptr to device tree
1628 * @node: offset of the simplefb node
1629 * @base_address: framebuffer base address
1630 * @width: width in pixels
1631 * @height: height in pixels
1632 * @stride: bytes per line
1633 * @format: pixel format string
1635 * Convenience function to fill and enable a simplefb node.
1637 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
1638 u32 height
, u32 stride
, const char *format
)
1642 int i
, addrc
, sizec
, ret
;
1644 fdt_support_default_count_cells(fdt
, fdt_parent_offset(fdt
, node
),
1648 cells
[i
++] = cpu_to_fdt32(base_address
>> 32);
1649 cells
[i
++] = cpu_to_fdt32(base_address
);
1652 cells
[i
++] = cpu_to_fdt32(height
* stride
);
1654 ret
= fdt_setprop(fdt
, node
, "reg", cells
, sizeof(cells
[0]) * i
);
1658 snprintf(name
, sizeof(name
), "framebuffer@%" PRIx64
, base_address
);
1659 ret
= fdt_set_name(fdt
, node
, name
);
1663 ret
= fdt_setprop_u32(fdt
, node
, "width", width
);
1667 ret
= fdt_setprop_u32(fdt
, node
, "height", height
);
1671 ret
= fdt_setprop_u32(fdt
, node
, "stride", stride
);
1675 ret
= fdt_setprop_string(fdt
, node
, "format", format
);
1679 ret
= fdt_setprop_string(fdt
, node
, "status", "okay");
1687 * Update native-mode in display-timings from display environment variable.
1688 * The node to update are specified by path.
1690 int fdt_fixup_display(void *blob
, const char *path
, const char *display
)
1694 if (!display
|| !path
)
1695 return -FDT_ERR_NOTFOUND
;
1697 toff
= fdt_path_offset(blob
, path
);
1699 toff
= fdt_subnode_offset(blob
, toff
, "display-timings");
1703 for (off
= fdt_first_subnode(blob
, toff
);
1705 off
= fdt_next_subnode(blob
, off
)) {
1706 uint32_t h
= fdt_get_phandle(blob
, off
);
1707 debug("%s:0x%x\n", fdt_get_name(blob
, off
, NULL
),
1709 if (strcasecmp(fdt_get_name(blob
, off
, NULL
), display
) == 0)
1710 return fdt_setprop_u32(blob
, toff
, "native-mode", h
);
1715 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1717 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
1719 * @fdt: ptr to device tree
1720 * @fdto: ptr to device tree overlay
1722 * Convenience function to apply an overlay and display helpful messages
1723 * in the case of an error
1725 int fdt_overlay_apply_verbose(void *fdt
, void *fdto
)
1730 err
= fdt_path_offset(fdt
, "/__symbols__");
1731 has_symbols
= err
>= 0;
1733 err
= fdt_overlay_apply(fdt
, fdto
);
1735 printf("failed on fdt_overlay_apply(): %s\n",
1738 printf("base fdt does did not have a /__symbols__ node\n");
1739 printf("make sure you've compiled with -@\n");