3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
11 #include <stdio_dev.h>
12 #include <linux/ctype.h>
13 #include <linux/types.h>
14 #include <asm/global_data.h>
16 #include <fdt_support.h>
20 * Get cells len in bytes
21 * if #NNNN-cells property is 2 then len is 8
24 static int get_cells_len(const void *fdt
, const char *nr_cells_name
)
28 cell
= fdt_getprop(fdt
, 0, nr_cells_name
, NULL
);
29 if (cell
&& fdt32_to_cpu(*cell
) == 2)
36 * fdt_getprop_u32_default_node - Return a node's property or a default
38 * @fdt: ptr to device tree
39 * @off: offset of node
40 * @cell: cell offset in property
41 * @prop: property name
42 * @dflt: default value if the property isn't found
44 * Convenience function to return a node's property or a default value if
45 * the property doesn't exist.
47 u32
fdt_getprop_u32_default_node(const void *fdt
, int off
, int cell
,
48 const char *prop
, const u32 dflt
)
53 val
= fdt_getprop(fdt
, off
, prop
, &len
);
55 /* Check if property exists */
59 /* Check if property is long enough */
60 if (len
< ((cell
+ 1) * sizeof(uint32_t)))
63 return fdt32_to_cpu(*val
);
67 * fdt_getprop_u32_default - Find a node and return it's property or a default
69 * @fdt: ptr to device tree
71 * @prop: property name
72 * @dflt: default value if the property isn't found
74 * Convenience function to find a node and return it's property or a
75 * default value if it doesn't exist.
77 u32
fdt_getprop_u32_default(const void *fdt
, const char *path
,
78 const char *prop
, const u32 dflt
)
82 off
= fdt_path_offset(fdt
, path
);
86 return fdt_getprop_u32_default_node(fdt
, off
, 0, prop
, dflt
);
90 * fdt_find_and_setprop: Find a node and set it's property
92 * @fdt: ptr to device tree
94 * @prop: property name
95 * @val: ptr to new value
96 * @len: length of new property value
97 * @create: flag to create the property if it doesn't exist
99 * Convenience function to directly set a property given the path to the node.
101 int fdt_find_and_setprop(void *fdt
, const char *node
, const char *prop
,
102 const void *val
, int len
, int create
)
104 int nodeoff
= fdt_path_offset(fdt
, node
);
109 if ((!create
) && (fdt_get_property(fdt
, nodeoff
, prop
, NULL
) == NULL
))
110 return 0; /* create flag not set; so exit quietly */
112 return fdt_setprop(fdt
, nodeoff
, prop
, val
, len
);
116 * fdt_find_or_add_subnode - find or possibly add a subnode of a given node
117 * @fdt: pointer to the device tree blob
118 * @parentoffset: structure block offset of a node
119 * @name: name of the subnode to locate
121 * fdt_subnode_offset() finds a subnode of the node with a given name.
122 * If the subnode does not exist, it will be created.
124 static int fdt_find_or_add_subnode(void *fdt
, int parentoffset
,
129 offset
= fdt_subnode_offset(fdt
, parentoffset
, name
);
131 if (offset
== -FDT_ERR_NOTFOUND
)
132 offset
= fdt_add_subnode(fdt
, parentoffset
, name
);
135 printf("%s: %s: %s\n", __func__
, name
, fdt_strerror(offset
));
140 /* rename to CONFIG_OF_STDOUT_PATH ? */
141 #if defined(OF_STDOUT_PATH)
142 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
144 return fdt_setprop(fdt
, chosenoff
, "linux,stdout-path",
145 OF_STDOUT_PATH
, strlen(OF_STDOUT_PATH
) + 1);
147 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
148 static void fdt_fill_multisername(char *sername
, size_t maxlen
)
150 const char *outname
= stdio_devices
[stdout
]->name
;
152 if (strcmp(outname
, "serial") > 0)
153 strncpy(sername
, outname
, maxlen
);
156 if (strcmp(outname
+ 1, "serial") > 0)
157 strncpy(sername
, outname
+ 1, maxlen
);
160 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
164 char sername
[9] = { 0 };
167 char tmp
[256]; /* long enough */
169 fdt_fill_multisername(sername
, sizeof(sername
) - 1);
171 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
173 aliasoff
= fdt_path_offset(fdt
, "/aliases");
179 path
= fdt_getprop(fdt
, aliasoff
, sername
, &len
);
185 /* fdt_setprop may break "path" so we copy it to tmp buffer */
186 memcpy(tmp
, path
, len
);
188 err
= fdt_setprop(fdt
, chosenoff
, "linux,stdout-path", tmp
, len
);
191 printf("WARNING: could not set linux,stdout-path %s.\n",
197 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
203 static inline int fdt_setprop_uxx(void *fdt
, int nodeoffset
, const char *name
,
204 uint64_t val
, int is_u64
)
207 return fdt_setprop_u64(fdt
, nodeoffset
, name
, val
);
209 return fdt_setprop_u32(fdt
, nodeoffset
, name
, (uint32_t)val
);
213 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
)
220 /* just return if the size of initrd is zero */
221 if (initrd_start
== initrd_end
)
224 /* find or create "/chosen" node. */
225 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
229 total
= fdt_num_mem_rsv(fdt
);
232 * Look for an existing entry and update it. If we don't find
233 * the entry, we will j be the next available slot.
235 for (j
= 0; j
< total
; j
++) {
236 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
237 if (addr
== initrd_start
) {
238 fdt_del_mem_rsv(fdt
, j
);
243 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
245 printf("fdt_initrd: %s\n", fdt_strerror(err
));
249 is_u64
= (get_cells_len(fdt
, "#address-cells") == 8);
251 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-start",
252 (uint64_t)initrd_start
, is_u64
);
255 printf("WARNING: could not set linux,initrd-start %s.\n",
260 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-end",
261 (uint64_t)initrd_end
, is_u64
);
264 printf("WARNING: could not set linux,initrd-end %s.\n",
273 int fdt_chosen(void *fdt
)
277 char *str
; /* used to set string properties */
279 err
= fdt_check_header(fdt
);
281 printf("fdt_chosen: %s\n", fdt_strerror(err
));
285 /* find or create "/chosen" node. */
286 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
290 str
= getenv("bootargs");
292 err
= fdt_setprop(fdt
, nodeoffset
, "bootargs", str
,
295 printf("WARNING: could not set bootargs %s.\n",
301 return fdt_fixup_stdout(fdt
, nodeoffset
);
304 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
305 const void *val
, int len
, int create
)
309 debug("Updating property '%s/%s' = ", path
, prop
);
310 for (i
= 0; i
< len
; i
++)
311 debug(" %.2x", *(u8
*)(val
+i
));
314 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
316 printf("Unable to update property %s:%s, err=%s\n",
317 path
, prop
, fdt_strerror(rc
));
320 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
323 fdt32_t tmp
= cpu_to_fdt32(val
);
324 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
327 void do_fixup_by_prop(void *fdt
,
328 const char *pname
, const void *pval
, int plen
,
329 const char *prop
, const void *val
, int len
,
335 debug("Updating property '%s' = ", prop
);
336 for (i
= 0; i
< len
; i
++)
337 debug(" %.2x", *(u8
*)(val
+i
));
340 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
341 while (off
!= -FDT_ERR_NOTFOUND
) {
342 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
343 fdt_setprop(fdt
, off
, prop
, val
, len
);
344 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
348 void do_fixup_by_prop_u32(void *fdt
,
349 const char *pname
, const void *pval
, int plen
,
350 const char *prop
, u32 val
, int create
)
352 fdt32_t tmp
= cpu_to_fdt32(val
);
353 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
356 void do_fixup_by_compat(void *fdt
, const char *compat
,
357 const char *prop
, const void *val
, int len
, int create
)
362 debug("Updating property '%s' = ", prop
);
363 for (i
= 0; i
< len
; i
++)
364 debug(" %.2x", *(u8
*)(val
+i
));
367 off
= fdt_node_offset_by_compatible(fdt
, -1, compat
);
368 while (off
!= -FDT_ERR_NOTFOUND
) {
369 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
370 fdt_setprop(fdt
, off
, prop
, val
, len
);
371 off
= fdt_node_offset_by_compatible(fdt
, off
, compat
);
375 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
376 const char *prop
, u32 val
, int create
)
378 fdt32_t tmp
= cpu_to_fdt32(val
);
379 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
383 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
385 static int fdt_pack_reg(const void *fdt
, void *buf
, uint64_t *address
,
386 uint64_t *size
, int n
)
389 int address_len
= get_cells_len(fdt
, "#address-cells");
390 int size_len
= get_cells_len(fdt
, "#size-cells");
393 for (i
= 0; i
< n
; i
++) {
394 if (address_len
== 8)
395 *(fdt64_t
*)p
= cpu_to_fdt64(address
[i
]);
397 *(fdt32_t
*)p
= cpu_to_fdt32(address
[i
]);
401 *(fdt64_t
*)p
= cpu_to_fdt64(size
[i
]);
403 *(fdt32_t
*)p
= cpu_to_fdt32(size
[i
]);
407 return p
- (char *)buf
;
410 #ifdef CONFIG_NR_DRAM_BANKS
411 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
413 #define MEMORY_BANKS_MAX 4
415 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
419 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
421 if (banks
> MEMORY_BANKS_MAX
) {
422 printf("%s: num banks %d exceeds hardcoded limit %d."
423 " Recompile with higher MEMORY_BANKS_MAX?\n",
424 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
428 err
= fdt_check_header(blob
);
430 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
434 /* find or create "/memory" node. */
435 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
439 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
442 printf("WARNING: could not set %s %s.\n", "device_type",
447 len
= fdt_pack_reg(blob
, tmp
, start
, size
, banks
);
449 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
451 printf("WARNING: could not set %s %s.\n",
452 "reg", fdt_strerror(err
));
458 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
460 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
463 void fdt_fixup_ethernet(void *fdt
)
466 char enet
[16], *tmp
, *end
;
469 unsigned char mac_addr
[6];
471 node
= fdt_path_offset(fdt
, "/aliases");
475 if (!getenv("ethaddr")) {
476 if (getenv("usbethaddr")) {
477 strcpy(mac
, "usbethaddr");
479 debug("No ethernet MAC Address defined\n");
483 strcpy(mac
, "ethaddr");
487 while ((tmp
= getenv(mac
)) != NULL
) {
488 sprintf(enet
, "ethernet%d", i
);
489 path
= fdt_getprop(fdt
, node
, enet
, NULL
);
491 debug("No alias for %s\n", enet
);
492 sprintf(mac
, "eth%daddr", ++i
);
496 for (j
= 0; j
< 6; j
++) {
497 mac_addr
[j
] = tmp
? simple_strtoul(tmp
, &end
, 16) : 0;
499 tmp
= (*end
) ? end
+1 : end
;
502 do_fixup_by_path(fdt
, path
, "mac-address", &mac_addr
, 6, 0);
503 do_fixup_by_path(fdt
, path
, "local-mac-address",
506 sprintf(mac
, "eth%daddr", ++i
);
510 /* Resize the fdt to its actual size + a bit of padding */
511 int fdt_shrink_to_minimum(void *blob
)
521 total
= fdt_num_mem_rsv(blob
);
522 for (i
= 0; i
< total
; i
++) {
523 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
524 if (addr
== (uintptr_t)blob
) {
525 fdt_del_mem_rsv(blob
, i
);
531 * Calculate the actual size of the fdt
532 * plus the size needed for 5 fdt_add_mem_rsv, one
533 * for the fdt itself and 4 for a possible initrd
534 * ((initrd-start + initrd-end) * 2 (name & value))
536 actualsize
= fdt_off_dt_strings(blob
) +
537 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
539 /* Make it so the fdt ends on a page boundary */
540 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
541 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
543 /* Change the fdt header to reflect the correct size */
544 fdt_set_totalsize(blob
, actualsize
);
546 /* Add the new reservation */
547 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
555 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
557 #define FDT_PCI_PREFETCH (0x40000000)
558 #define FDT_PCI_MEM32 (0x02000000)
559 #define FDT_PCI_IO (0x01000000)
560 #define FDT_PCI_MEM64 (0x03000000)
562 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
564 int addrcell
, sizecell
, len
, r
;
566 /* sized based on pci addr cells, size-cells, & address-cells */
567 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
569 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
570 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
572 dma_range
= &dma_ranges
[0];
573 for (r
= 0; r
< hose
->region_count
; r
++) {
574 u64 bus_start
, phys_start
, size
;
576 /* skip if !PCI_REGION_SYS_MEMORY */
577 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
580 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
581 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
582 size
= (u64
)hose
->regions
[r
].size
;
585 if (size
>= 0x100000000ull
)
586 dma_range
[0] |= FDT_PCI_MEM64
;
588 dma_range
[0] |= FDT_PCI_MEM32
;
589 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
590 dma_range
[0] |= FDT_PCI_PREFETCH
;
591 #ifdef CONFIG_SYS_PCI_64BIT
592 dma_range
[1] = bus_start
>> 32;
596 dma_range
[2] = bus_start
& 0xffffffff;
599 dma_range
[3] = phys_start
>> 32;
600 dma_range
[4] = phys_start
& 0xffffffff;
602 dma_range
[3] = phys_start
& 0xffffffff;
606 dma_range
[3 + addrcell
+ 0] = size
>> 32;
607 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
609 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
612 dma_range
+= (3 + addrcell
+ sizecell
);
615 len
= dma_range
- &dma_ranges
[0];
617 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
623 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
625 * Provide a weak default function to return the flash bank size.
626 * There might be multiple non-identical flash chips connected to one
627 * chip-select, so we need to pass an index as well.
629 u32
__flash_get_bank_size(int cs
, int idx
)
631 extern flash_info_t flash_info
[];
634 * As default, a simple 1:1 mapping is provided. Boards with
635 * a different mapping need to supply a board specific mapping
638 return flash_info
[cs
].size
;
640 u32
flash_get_bank_size(int cs
, int idx
)
641 __attribute__((weak
, alias("__flash_get_bank_size")));
644 * This function can be used to update the size in the "reg" property
645 * of all NOR FLASH device nodes. This is necessary for boards with
646 * non-fixed NOR FLASH sizes.
648 int fdt_fixup_nor_flash_size(void *blob
)
650 char compat
[][16] = { "cfi-flash", "jedec-flash" };
653 struct fdt_property
*prop
;
657 for (i
= 0; i
< 2; i
++) {
658 off
= fdt_node_offset_by_compatible(blob
, -1, compat
[i
]);
659 while (off
!= -FDT_ERR_NOTFOUND
) {
663 * Found one compatible node, so fixup the size
664 * int its reg properties
666 prop
= fdt_get_property_w(blob
, off
, "reg", &len
);
668 int tuple_size
= 3 * sizeof(reg
);
671 * There might be multiple reg-tuples,
672 * so loop through them all
674 reg
= reg2
= (u32
*)&prop
->data
[0];
675 for (idx
= 0; idx
< (len
/ tuple_size
); idx
++) {
677 * Update size in reg property
679 reg
[2] = flash_get_bank_size(reg
[0],
683 * Point to next reg tuple
688 fdt_setprop(blob
, off
, "reg", reg2
, len
);
691 /* Move to next compatible node */
692 off
= fdt_node_offset_by_compatible(blob
, off
,
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
;
892 parts
= getenv("mtdparts");
896 if (mtdparts_init() != 0)
899 for (i
= 0; i
< node_info_size
; i
++) {
901 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
902 while (noff
!= -FDT_ERR_NOTFOUND
) {
903 debug("%s: %s, mtd dev type %d\n",
904 fdt_get_name(blob
, noff
, 0),
905 ni
[i
].compat
, ni
[i
].type
);
906 dev
= device_find(ni
[i
].type
, idx
++);
908 if (fdt_node_set_part_info(blob
, noff
, dev
))
909 return; /* return on error */
912 /* Jump to next flash node */
913 noff
= fdt_node_offset_by_compatible(blob
, noff
,
920 void fdt_del_node_and_alias(void *blob
, const char *alias
)
922 int off
= fdt_path_offset(blob
, alias
);
927 fdt_del_node(blob
, off
);
929 off
= fdt_path_offset(blob
, "/aliases");
930 fdt_delprop(blob
, off
, alias
);
935 /* Max address size we deal with */
936 #define OF_MAX_ADDR_CELLS 4
937 #define OF_BAD_ADDR ((u64)-1)
938 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
943 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
947 printf(" %08x", *(addr
++));
951 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
954 /* Callbacks for bus specific translators */
957 const char *addresses
;
958 void (*count_cells
)(void *blob
, int parentoffset
,
959 int *addrc
, int *sizec
);
960 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
961 int na
, int ns
, int pna
);
962 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
965 /* Default translator (generic bus) */
966 void of_bus_default_count_cells(void *blob
, int parentoffset
,
967 int *addrc
, int *sizec
)
972 prop
= fdt_getprop(blob
, parentoffset
, "#address-cells", NULL
);
974 *addrc
= be32_to_cpup(prop
);
980 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
982 *sizec
= be32_to_cpup(prop
);
988 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
989 int na
, int ns
, int pna
)
993 cp
= of_read_number(range
, na
);
994 s
= of_read_number(range
+ na
+ pna
, ns
);
995 da
= of_read_number(addr
, na
);
997 debug("OF: default map, cp="PRu64
", s="PRu64
", da="PRu64
"\n",
1000 if (da
< cp
|| da
>= (cp
+ s
))
1005 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
1007 u64 a
= of_read_number(addr
, na
);
1008 memset(addr
, 0, na
* 4);
1011 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
1012 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
1017 /* Array of bus specific translators */
1018 static struct of_bus of_busses
[] = {
1023 .count_cells
= of_bus_default_count_cells
,
1024 .map
= of_bus_default_map
,
1025 .translate
= of_bus_default_translate
,
1029 static int of_translate_one(void * blob
, int parent
, struct of_bus
*bus
,
1030 struct of_bus
*pbus
, fdt32_t
*addr
,
1031 int na
, int ns
, int pna
, const char *rprop
)
1033 const fdt32_t
*ranges
;
1036 u64 offset
= OF_BAD_ADDR
;
1038 /* Normally, an absence of a "ranges" property means we are
1039 * crossing a non-translatable boundary, and thus the addresses
1040 * below the current not cannot be converted to CPU physical ones.
1041 * Unfortunately, while this is very clear in the spec, it's not
1042 * what Apple understood, and they do have things like /uni-n or
1043 * /ht nodes with no "ranges" property and a lot of perfectly
1044 * useable mapped devices below them. Thus we treat the absence of
1045 * "ranges" as equivalent to an empty "ranges" property which means
1046 * a 1:1 translation at that level. It's up to the caller not to try
1047 * to translate addresses that aren't supposed to be translated in
1048 * the first place. --BenH.
1050 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1051 if (ranges
== NULL
|| rlen
== 0) {
1052 offset
= of_read_number(addr
, na
);
1053 memset(addr
, 0, pna
* 4);
1054 debug("OF: no ranges, 1:1 translation\n");
1058 debug("OF: walking ranges...\n");
1060 /* Now walk through the ranges */
1062 rone
= na
+ pna
+ ns
;
1063 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1064 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1065 if (offset
!= OF_BAD_ADDR
)
1068 if (offset
== OF_BAD_ADDR
) {
1069 debug("OF: not found !\n");
1072 memcpy(addr
, ranges
+ na
, 4 * pna
);
1075 of_dump_addr("OF: parent translation for:", addr
, pna
);
1076 debug("OF: with offset: "PRu64
"\n", offset
);
1078 /* Translate it into parent bus space */
1079 return pbus
->translate(addr
, offset
, pna
);
1083 * Translate an address from the device-tree into a CPU physical address,
1084 * this walks up the tree and applies the various bus mappings on the
1087 * Note: We consider that crossing any level with #size-cells == 0 to mean
1088 * that translation is impossible (that is we are not dealing with a value
1089 * that can be mapped to a cpu physical address). This is not really specified
1090 * that way, but this is traditionally the way IBM at least do things
1092 static u64
__of_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
,
1096 struct of_bus
*bus
, *pbus
;
1097 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1098 int na
, ns
, pna
, pns
;
1099 u64 result
= OF_BAD_ADDR
;
1101 debug("OF: ** translation for device %s **\n",
1102 fdt_get_name(blob
, node_offset
, NULL
));
1104 /* Get parent & match bus type */
1105 parent
= fdt_parent_offset(blob
, node_offset
);
1108 bus
= &of_busses
[0];
1110 /* Cound address cells & copy address locally */
1111 bus
->count_cells(blob
, parent
, &na
, &ns
);
1112 if (!OF_CHECK_COUNTS(na
, ns
)) {
1113 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1114 fdt_get_name(blob
, node_offset
, NULL
));
1117 memcpy(addr
, in_addr
, na
* 4);
1119 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1120 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1121 of_dump_addr("OF: translating address:", addr
, na
);
1125 /* Switch to parent bus */
1126 node_offset
= parent
;
1127 parent
= fdt_parent_offset(blob
, node_offset
);
1129 /* If root, we have finished */
1131 debug("OF: reached root node\n");
1132 result
= of_read_number(addr
, na
);
1136 /* Get new parent bus and counts */
1137 pbus
= &of_busses
[0];
1138 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1139 if (!OF_CHECK_COUNTS(pna
, pns
)) {
1140 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1141 fdt_get_name(blob
, node_offset
, NULL
));
1145 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1146 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1148 /* Apply bus translation */
1149 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1150 addr
, na
, ns
, pna
, rprop
))
1153 /* Complete the move up one level */
1158 of_dump_addr("OF: one level translation:", addr
, na
);
1165 u64
fdt_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
)
1167 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1171 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1172 * who's reg property matches a physical cpu address
1174 * @blob: ptr to device tree
1175 * @compat: compatiable string to match
1176 * @compat_off: property name
1179 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1180 phys_addr_t compat_off
)
1182 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1183 while (off
!= -FDT_ERR_NOTFOUND
) {
1184 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1186 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1189 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1192 return -FDT_ERR_NOTFOUND
;
1196 * fdt_alloc_phandle: Return next free phandle value
1198 * @blob: ptr to device tree
1200 int fdt_alloc_phandle(void *blob
)
1202 int offset
, phandle
= 0;
1204 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1205 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1206 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1213 * fdt_set_phandle: Create a phandle property for the given node
1215 * @fdt: ptr to device tree
1216 * @nodeoffset: node to update
1217 * @phandle: phandle value to set (must be unique)
1219 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1224 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1226 if ((off
>= 0) && (off
!= nodeoffset
)) {
1229 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1230 printf("Trying to update node %s with phandle %u ",
1233 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1234 printf("that already exists in node %s.\n", buf
);
1235 return -FDT_ERR_BADPHANDLE
;
1239 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1244 * For now, also set the deprecated "linux,phandle" property, so that we
1245 * don't break older kernels.
1247 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1253 * fdt_create_phandle: Create a phandle property for the given node
1255 * @fdt: ptr to device tree
1256 * @nodeoffset: node to update
1258 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1260 /* see if there is a phandle already */
1261 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1263 /* if we got 0, means no phandle so create one */
1267 phandle
= fdt_alloc_phandle(fdt
);
1268 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1270 printf("Can't set phandle %u: %s\n", phandle
,
1280 * fdt_set_node_status: Set status for the given node
1282 * @fdt: ptr to device tree
1283 * @nodeoffset: node to update
1284 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1285 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1286 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1288 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1289 enum fdt_status status
, unsigned int error_code
)
1298 case FDT_STATUS_OKAY
:
1299 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1301 case FDT_STATUS_DISABLED
:
1302 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1304 case FDT_STATUS_FAIL
:
1305 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1307 case FDT_STATUS_FAIL_ERROR_CODE
:
1308 sprintf(buf
, "fail-%d", error_code
);
1309 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1312 printf("Invalid fdt status: %x\n", status
);
1321 * fdt_set_status_by_alias: Set status for the given node given an alias
1323 * @fdt: ptr to device tree
1324 * @alias: alias of node to update
1325 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1326 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1327 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1329 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1330 enum fdt_status status
, unsigned int error_code
)
1332 int offset
= fdt_path_offset(fdt
, alias
);
1334 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1337 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1338 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1343 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1344 if (noff
!= -FDT_ERR_NOTFOUND
) {
1345 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1347 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1348 if (ret
== -FDT_ERR_NOSPACE
) {
1349 ret
= fdt_increase_size(blob
, 512);
1354 } else if (ret
< 0) {
1355 printf("Can't add property: %s\n", fdt_strerror(ret
));
1361 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1367 * Verify the physical address of device tree node for a given alias
1369 * This function locates the device tree node of a given alias, and then
1370 * verifies that the physical address of that device matches the given
1371 * parameter. It displays a message if there is a mismatch.
1373 * Returns 1 on success, 0 on failure
1375 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1382 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1384 /* If there's no such alias, then it's not a failure */
1388 node
= fdt_path_offset(fdt
, path
);
1390 printf("Warning: device tree alias '%s' points to invalid "
1391 "node %s.\n", alias
, path
);
1395 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1397 printf("Warning: device tree node '%s' has no address.\n",
1402 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1403 if (addr
!= dt_addr
) {
1404 printf("Warning: U-Boot configured device %s at address %llx,\n"
1405 " but the device tree has it address %llx.\n",
1406 alias
, addr
, dt_addr
);
1414 * Returns the base address of an SOC or PCI node
1416 u64
fdt_get_base_address(void *fdt
, int node
)
1420 const fdt32_t
*prop
;
1422 prop
= fdt_getprop(fdt
, node
, "#address-cells", &size
);
1423 if (prop
&& size
== 4)
1424 naddr
= be32_to_cpup(prop
);
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
);