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 void fdt_fill_multisername(char *sername
, size_t maxlen
)
136 const char *outname
= stdio_devices
[stdout
]->name
;
138 if (strcmp(outname
, "serial") > 0)
139 strncpy(sername
, outname
, maxlen
);
142 if (strcmp(outname
+ 1, "serial") > 0)
143 strncpy(sername
, outname
+ 1, maxlen
);
146 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
150 char sername
[9] = { 0 };
153 char tmp
[256]; /* long enough */
155 fdt_fill_multisername(sername
, sizeof(sername
) - 1);
157 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
159 aliasoff
= fdt_path_offset(fdt
, "/aliases");
165 path
= fdt_getprop(fdt
, aliasoff
, sername
, &len
);
171 /* fdt_setprop may break "path" so we copy it to tmp buffer */
172 memcpy(tmp
, path
, len
);
174 err
= fdt_setprop(fdt
, chosenoff
, "linux,stdout-path", tmp
, len
);
176 printf("WARNING: could not set linux,stdout-path %s.\n",
182 printf("WARNING: %s: could not read %s alias: %s\n",
183 __func__
, sername
, fdt_strerror(err
));
188 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
194 static inline int fdt_setprop_uxx(void *fdt
, int nodeoffset
, const char *name
,
195 uint64_t val
, int is_u64
)
198 return fdt_setprop_u64(fdt
, nodeoffset
, name
, val
);
200 return fdt_setprop_u32(fdt
, nodeoffset
, name
, (uint32_t)val
);
203 int fdt_root(void *fdt
)
208 err
= fdt_check_header(fdt
);
210 printf("fdt_root: %s\n", fdt_strerror(err
));
214 serial
= getenv("serial#");
216 err
= fdt_setprop(fdt
, 0, "serial-number", serial
,
220 printf("WARNING: could not set serial-number %s.\n",
229 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
)
236 /* just return if the size of initrd is zero */
237 if (initrd_start
== initrd_end
)
240 /* find or create "/chosen" node. */
241 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
245 total
= fdt_num_mem_rsv(fdt
);
248 * Look for an existing entry and update it. If we don't find
249 * the entry, we will j be the next available slot.
251 for (j
= 0; j
< total
; j
++) {
252 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
253 if (addr
== initrd_start
) {
254 fdt_del_mem_rsv(fdt
, j
);
259 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
261 printf("fdt_initrd: %s\n", fdt_strerror(err
));
265 is_u64
= (fdt_address_cells(fdt
, 0) == 2);
267 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-start",
268 (uint64_t)initrd_start
, is_u64
);
271 printf("WARNING: could not set linux,initrd-start %s.\n",
276 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-end",
277 (uint64_t)initrd_end
, is_u64
);
280 printf("WARNING: could not set linux,initrd-end %s.\n",
289 int fdt_chosen(void *fdt
)
293 char *str
; /* used to set string properties */
295 err
= fdt_check_header(fdt
);
297 printf("fdt_chosen: %s\n", fdt_strerror(err
));
301 /* find or create "/chosen" node. */
302 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
306 str
= getenv("bootargs");
308 err
= fdt_setprop(fdt
, nodeoffset
, "bootargs", str
,
311 printf("WARNING: could not set bootargs %s.\n",
317 return fdt_fixup_stdout(fdt
, nodeoffset
);
320 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
321 const void *val
, int len
, int create
)
325 debug("Updating property '%s/%s' = ", path
, prop
);
326 for (i
= 0; i
< len
; i
++)
327 debug(" %.2x", *(u8
*)(val
+i
));
330 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
332 printf("Unable to update property %s:%s, err=%s\n",
333 path
, prop
, fdt_strerror(rc
));
336 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
339 fdt32_t tmp
= cpu_to_fdt32(val
);
340 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
343 void do_fixup_by_prop(void *fdt
,
344 const char *pname
, const void *pval
, int plen
,
345 const char *prop
, const void *val
, int len
,
351 debug("Updating property '%s' = ", prop
);
352 for (i
= 0; i
< len
; i
++)
353 debug(" %.2x", *(u8
*)(val
+i
));
356 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
357 while (off
!= -FDT_ERR_NOTFOUND
) {
358 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
359 fdt_setprop(fdt
, off
, prop
, val
, len
);
360 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
364 void do_fixup_by_prop_u32(void *fdt
,
365 const char *pname
, const void *pval
, int plen
,
366 const char *prop
, u32 val
, int create
)
368 fdt32_t tmp
= cpu_to_fdt32(val
);
369 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
372 void do_fixup_by_compat(void *fdt
, const char *compat
,
373 const char *prop
, const void *val
, int len
, int create
)
378 debug("Updating property '%s' = ", prop
);
379 for (i
= 0; i
< len
; i
++)
380 debug(" %.2x", *(u8
*)(val
+i
));
383 off
= fdt_node_offset_by_compatible(fdt
, -1, compat
);
384 while (off
!= -FDT_ERR_NOTFOUND
) {
385 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
386 fdt_setprop(fdt
, off
, prop
, val
, len
);
387 off
= fdt_node_offset_by_compatible(fdt
, off
, compat
);
391 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
392 const char *prop
, u32 val
, int create
)
394 fdt32_t tmp
= cpu_to_fdt32(val
);
395 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
399 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
401 static int fdt_pack_reg(const void *fdt
, void *buf
, u64
*address
, u64
*size
,
405 int address_cells
= fdt_address_cells(fdt
, 0);
406 int size_cells
= fdt_size_cells(fdt
, 0);
409 for (i
= 0; i
< n
; i
++) {
410 if (address_cells
== 2)
411 *(fdt64_t
*)p
= cpu_to_fdt64(address
[i
]);
413 *(fdt32_t
*)p
= cpu_to_fdt32(address
[i
]);
414 p
+= 4 * address_cells
;
417 *(fdt64_t
*)p
= cpu_to_fdt64(size
[i
]);
419 *(fdt32_t
*)p
= cpu_to_fdt32(size
[i
]);
423 return p
- (char *)buf
;
426 #ifdef CONFIG_NR_DRAM_BANKS
427 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
429 #define MEMORY_BANKS_MAX 4
431 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
435 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
437 if (banks
> MEMORY_BANKS_MAX
) {
438 printf("%s: num banks %d exceeds hardcoded limit %d."
439 " Recompile with higher MEMORY_BANKS_MAX?\n",
440 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
444 err
= fdt_check_header(blob
);
446 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
450 /* find or create "/memory" node. */
451 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
455 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
458 printf("WARNING: could not set %s %s.\n", "device_type",
466 len
= fdt_pack_reg(blob
, tmp
, start
, size
, banks
);
468 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
470 printf("WARNING: could not set %s %s.\n",
471 "reg", fdt_strerror(err
));
477 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
479 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
482 void fdt_fixup_ethernet(void *fdt
)
488 unsigned char mac_addr
[6];
491 node
= fdt_path_offset(fdt
, "/aliases");
495 for (offset
= fdt_first_property_offset(fdt
, node
);
497 offset
= fdt_next_property_offset(fdt
, offset
)) {
499 int len
= strlen("ethernet");
501 path
= fdt_getprop_by_offset(fdt
, offset
, &name
, NULL
);
502 if (!strncmp(name
, "ethernet", len
)) {
503 i
= trailing_strtol(name
);
506 strcpy(mac
, "ethaddr");
508 sprintf(mac
, "eth%daddr", i
);
516 for (j
= 0; j
< 6; j
++) {
518 simple_strtoul(tmp
, &end
, 16) : 0;
520 tmp
= (*end
) ? end
+ 1 : end
;
523 do_fixup_by_path(fdt
, path
, "mac-address",
525 do_fixup_by_path(fdt
, path
, "local-mac-address",
531 /* Resize the fdt to its actual size + a bit of padding */
532 int fdt_shrink_to_minimum(void *blob
)
542 total
= fdt_num_mem_rsv(blob
);
543 for (i
= 0; i
< total
; i
++) {
544 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
545 if (addr
== (uintptr_t)blob
) {
546 fdt_del_mem_rsv(blob
, i
);
552 * Calculate the actual size of the fdt
553 * plus the size needed for 5 fdt_add_mem_rsv, one
554 * for the fdt itself and 4 for a possible initrd
555 * ((initrd-start + initrd-end) * 2 (name & value))
557 actualsize
= fdt_off_dt_strings(blob
) +
558 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
560 /* Make it so the fdt ends on a page boundary */
561 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
562 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
564 /* Change the fdt header to reflect the correct size */
565 fdt_set_totalsize(blob
, actualsize
);
567 /* Add the new reservation */
568 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
576 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
578 #define FDT_PCI_PREFETCH (0x40000000)
579 #define FDT_PCI_MEM32 (0x02000000)
580 #define FDT_PCI_IO (0x01000000)
581 #define FDT_PCI_MEM64 (0x03000000)
583 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
585 int addrcell
, sizecell
, len
, r
;
587 /* sized based on pci addr cells, size-cells, & address-cells */
588 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
590 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
591 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
593 dma_range
= &dma_ranges
[0];
594 for (r
= 0; r
< hose
->region_count
; r
++) {
595 u64 bus_start
, phys_start
, size
;
597 /* skip if !PCI_REGION_SYS_MEMORY */
598 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
601 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
602 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
603 size
= (u64
)hose
->regions
[r
].size
;
606 if (size
>= 0x100000000ull
)
607 dma_range
[0] |= FDT_PCI_MEM64
;
609 dma_range
[0] |= FDT_PCI_MEM32
;
610 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
611 dma_range
[0] |= FDT_PCI_PREFETCH
;
612 #ifdef CONFIG_SYS_PCI_64BIT
613 dma_range
[1] = bus_start
>> 32;
617 dma_range
[2] = bus_start
& 0xffffffff;
620 dma_range
[3] = phys_start
>> 32;
621 dma_range
[4] = phys_start
& 0xffffffff;
623 dma_range
[3] = phys_start
& 0xffffffff;
627 dma_range
[3 + addrcell
+ 0] = size
>> 32;
628 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
630 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
633 dma_range
+= (3 + addrcell
+ sizecell
);
636 len
= dma_range
- &dma_ranges
[0];
638 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
644 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
646 * Provide a weak default function to return the flash bank size.
647 * There might be multiple non-identical flash chips connected to one
648 * chip-select, so we need to pass an index as well.
650 u32
__flash_get_bank_size(int cs
, int idx
)
652 extern flash_info_t flash_info
[];
655 * As default, a simple 1:1 mapping is provided. Boards with
656 * a different mapping need to supply a board specific mapping
659 return flash_info
[cs
].size
;
661 u32
flash_get_bank_size(int cs
, int idx
)
662 __attribute__((weak
, alias("__flash_get_bank_size")));
665 * This function can be used to update the size in the "reg" property
666 * of all NOR FLASH device nodes. This is necessary for boards with
667 * non-fixed NOR FLASH sizes.
669 int fdt_fixup_nor_flash_size(void *blob
)
671 char compat
[][16] = { "cfi-flash", "jedec-flash" };
674 struct fdt_property
*prop
;
678 for (i
= 0; i
< 2; i
++) {
679 off
= fdt_node_offset_by_compatible(blob
, -1, compat
[i
]);
680 while (off
!= -FDT_ERR_NOTFOUND
) {
684 * Found one compatible node, so fixup the size
685 * int its reg properties
687 prop
= fdt_get_property_w(blob
, off
, "reg", &len
);
689 int tuple_size
= 3 * sizeof(reg
);
692 * There might be multiple reg-tuples,
693 * so loop through them all
695 reg
= reg2
= (u32
*)&prop
->data
[0];
696 for (idx
= 0; idx
< (len
/ tuple_size
); idx
++) {
698 * Update size in reg property
700 reg
[2] = flash_get_bank_size(reg
[0],
704 * Point to next reg tuple
709 fdt_setprop(blob
, off
, "reg", reg2
, len
);
712 /* Move to next compatible node */
713 off
= fdt_node_offset_by_compatible(blob
, off
,
722 int fdt_increase_size(void *fdt
, int add_len
)
726 newlen
= fdt_totalsize(fdt
) + add_len
;
728 /* Open in place with a new len */
729 return fdt_open_into(fdt
, fdt
, newlen
);
732 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
733 #include <jffs2/load_kernel.h>
734 #include <mtd_node.h>
741 int fdt_del_subnodes(const void *blob
, int parent_offset
)
746 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
747 (off
>= 0) && (ndepth
> 0);
748 off
= fdt_next_node(blob
, off
, &ndepth
)) {
750 debug("delete %s: offset: %x\n",
751 fdt_get_name(blob
, off
, 0), off
);
752 ret
= fdt_del_node((void *)blob
, off
);
754 printf("Can't delete node: %s\n",
766 int fdt_del_partitions(void *blob
, int parent_offset
)
773 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
774 if (off
> 0 && ndepth
== 1) {
775 prop
= fdt_getprop(blob
, off
, "label", NULL
);
778 * Could not find label property, nand {}; node?
779 * Check subnode, delete partitions there if any.
781 return fdt_del_partitions(blob
, off
);
783 ret
= fdt_del_subnodes(blob
, parent_offset
);
785 printf("Can't remove subnodes: %s\n",
794 int fdt_node_set_part_info(void *blob
, int parent_offset
,
795 struct mtd_device
*dev
)
797 struct list_head
*pentry
;
798 struct part_info
*part
;
799 struct reg_cell cell
;
804 ret
= fdt_del_partitions(blob
, parent_offset
);
809 * Check if it is nand {}; subnode, adjust
810 * the offset in this case
812 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
813 if (off
> 0 && ndepth
== 1)
817 list_for_each_prev(pentry
, &dev
->parts
) {
820 part
= list_entry(pentry
, struct part_info
, link
);
822 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
823 part_num
, part
->name
, part
->size
,
824 part
->offset
, part
->mask_flags
);
826 sprintf(buf
, "partition@%llx", part
->offset
);
828 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
829 if (ret
== -FDT_ERR_NOSPACE
) {
830 ret
= fdt_increase_size(blob
, 512);
835 } else if (ret
< 0) {
836 printf("Can't add partition node: %s\n",
842 /* Check MTD_WRITEABLE_CMD flag */
843 if (part
->mask_flags
& 1) {
845 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
846 if (ret
== -FDT_ERR_NOSPACE
) {
847 ret
= fdt_increase_size(blob
, 512);
856 cell
.r0
= cpu_to_fdt32(part
->offset
);
857 cell
.r1
= cpu_to_fdt32(part
->size
);
859 ret
= fdt_setprop(blob
, newoff
, "reg", &cell
, sizeof(cell
));
860 if (ret
== -FDT_ERR_NOSPACE
) {
861 ret
= fdt_increase_size(blob
, 512);
870 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
871 if (ret
== -FDT_ERR_NOSPACE
) {
872 ret
= fdt_increase_size(blob
, 512);
884 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
887 printf("Can't add property: %s\n", fdt_strerror(ret
));
892 * Update partitions in nor/nand nodes using info from
893 * mtdparts environment variable. The nodes to update are
894 * specified by node_info structure which contains mtd device
895 * type and compatible string: E. g. the board code in
896 * ft_board_setup() could use:
898 * struct node_info nodes[] = {
899 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
900 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
903 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
905 void fdt_fixup_mtdparts(void *blob
, void *node_info
, int node_info_size
)
907 struct node_info
*ni
= node_info
;
908 struct mtd_device
*dev
;
913 parts
= getenv("mtdparts");
917 if (mtdparts_init() != 0)
920 for (i
= 0; i
< node_info_size
; i
++) {
922 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
923 while (noff
!= -FDT_ERR_NOTFOUND
) {
924 debug("%s: %s, mtd dev type %d\n",
925 fdt_get_name(blob
, noff
, 0),
926 ni
[i
].compat
, ni
[i
].type
);
927 dev
= device_find(ni
[i
].type
, idx
++);
929 if (fdt_node_set_part_info(blob
, noff
, dev
))
930 return; /* return on error */
933 /* Jump to next flash node */
934 noff
= fdt_node_offset_by_compatible(blob
, noff
,
941 void fdt_del_node_and_alias(void *blob
, const char *alias
)
943 int off
= fdt_path_offset(blob
, alias
);
948 fdt_del_node(blob
, off
);
950 off
= fdt_path_offset(blob
, "/aliases");
951 fdt_delprop(blob
, off
, alias
);
954 /* Max address size we deal with */
955 #define OF_MAX_ADDR_CELLS 4
956 #define OF_BAD_ADDR FDT_ADDR_T_NONE
957 #define OF_CHECK_COUNTS(na) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS)
961 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
965 printf(" %08x", *(addr
++));
969 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
972 /* Callbacks for bus specific translators */
975 const char *addresses
;
976 void (*count_cells
)(void *blob
, int parentoffset
,
977 int *addrc
, int *sizec
);
978 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
979 int na
, int ns
, int pna
);
980 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
983 /* Default translator (generic bus) */
984 void of_bus_default_count_cells(void *blob
, int parentoffset
,
985 int *addrc
, int *sizec
)
990 *addrc
= fdt_address_cells(blob
, parentoffset
);
993 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
995 *sizec
= be32_to_cpup(prop
);
1001 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
1002 int na
, int ns
, int pna
)
1006 cp
= of_read_number(range
, na
);
1007 s
= of_read_number(range
+ na
+ pna
, ns
);
1008 da
= of_read_number(addr
, na
);
1010 debug("OF: default map, cp=%" PRIu64
", s=%" PRIu64
1011 ", da=%" PRIu64
"\n", cp
, s
, da
);
1013 if (da
< cp
|| da
>= (cp
+ s
))
1018 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
1020 u64 a
= of_read_number(addr
, na
);
1021 memset(addr
, 0, na
* 4);
1024 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
1025 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
1030 /* Array of bus specific translators */
1031 static struct of_bus of_busses
[] = {
1036 .count_cells
= of_bus_default_count_cells
,
1037 .map
= of_bus_default_map
,
1038 .translate
= of_bus_default_translate
,
1042 static int of_translate_one(void * blob
, int parent
, struct of_bus
*bus
,
1043 struct of_bus
*pbus
, fdt32_t
*addr
,
1044 int na
, int ns
, int pna
, const char *rprop
)
1046 const fdt32_t
*ranges
;
1049 u64 offset
= OF_BAD_ADDR
;
1051 /* Normally, an absence of a "ranges" property means we are
1052 * crossing a non-translatable boundary, and thus the addresses
1053 * below the current not cannot be converted to CPU physical ones.
1054 * Unfortunately, while this is very clear in the spec, it's not
1055 * what Apple understood, and they do have things like /uni-n or
1056 * /ht nodes with no "ranges" property and a lot of perfectly
1057 * useable mapped devices below them. Thus we treat the absence of
1058 * "ranges" as equivalent to an empty "ranges" property which means
1059 * a 1:1 translation at that level. It's up to the caller not to try
1060 * to translate addresses that aren't supposed to be translated in
1061 * the first place. --BenH.
1063 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1064 if (ranges
== NULL
|| rlen
== 0) {
1065 offset
= of_read_number(addr
, na
);
1066 memset(addr
, 0, pna
* 4);
1067 debug("OF: no ranges, 1:1 translation\n");
1071 debug("OF: walking ranges...\n");
1073 /* Now walk through the ranges */
1075 rone
= na
+ pna
+ ns
;
1076 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1077 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1078 if (offset
!= OF_BAD_ADDR
)
1081 if (offset
== OF_BAD_ADDR
) {
1082 debug("OF: not found !\n");
1085 memcpy(addr
, ranges
+ na
, 4 * pna
);
1088 of_dump_addr("OF: parent translation for:", addr
, pna
);
1089 debug("OF: with offset: %" PRIu64
"\n", offset
);
1091 /* Translate it into parent bus space */
1092 return pbus
->translate(addr
, offset
, pna
);
1096 * Translate an address from the device-tree into a CPU physical address,
1097 * this walks up the tree and applies the various bus mappings on the
1100 * Note: We consider that crossing any level with #size-cells == 0 to mean
1101 * that translation is impossible (that is we are not dealing with a value
1102 * that can be mapped to a cpu physical address). This is not really specified
1103 * that way, but this is traditionally the way IBM at least do things
1105 static u64
__of_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
,
1109 struct of_bus
*bus
, *pbus
;
1110 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1111 int na
, ns
, pna
, pns
;
1112 u64 result
= OF_BAD_ADDR
;
1114 debug("OF: ** translation for device %s **\n",
1115 fdt_get_name(blob
, node_offset
, NULL
));
1117 /* Get parent & match bus type */
1118 parent
= fdt_parent_offset(blob
, node_offset
);
1121 bus
= &of_busses
[0];
1123 /* Cound address cells & copy address locally */
1124 bus
->count_cells(blob
, parent
, &na
, &ns
);
1125 if (!OF_CHECK_COUNTS(na
)) {
1126 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1127 fdt_get_name(blob
, node_offset
, NULL
));
1130 memcpy(addr
, in_addr
, na
* 4);
1132 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1133 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1134 of_dump_addr("OF: translating address:", addr
, na
);
1138 /* Switch to parent bus */
1139 node_offset
= parent
;
1140 parent
= fdt_parent_offset(blob
, node_offset
);
1142 /* If root, we have finished */
1144 debug("OF: reached root node\n");
1145 result
= of_read_number(addr
, na
);
1149 /* Get new parent bus and counts */
1150 pbus
= &of_busses
[0];
1151 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1152 if (!OF_CHECK_COUNTS(pna
)) {
1153 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1154 fdt_get_name(blob
, node_offset
, NULL
));
1158 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1159 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1161 /* Apply bus translation */
1162 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1163 addr
, na
, ns
, pna
, rprop
))
1166 /* Complete the move up one level */
1171 of_dump_addr("OF: one level translation:", addr
, na
);
1178 u64
fdt_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
)
1180 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1184 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1185 * who's reg property matches a physical cpu address
1187 * @blob: ptr to device tree
1188 * @compat: compatiable string to match
1189 * @compat_off: property name
1192 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1193 phys_addr_t compat_off
)
1195 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1196 while (off
!= -FDT_ERR_NOTFOUND
) {
1197 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1199 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1202 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1205 return -FDT_ERR_NOTFOUND
;
1209 * fdt_alloc_phandle: Return next free phandle value
1211 * @blob: ptr to device tree
1213 int fdt_alloc_phandle(void *blob
)
1216 uint32_t phandle
= 0;
1218 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1219 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1220 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1227 * fdt_set_phandle: Create a phandle property for the given node
1229 * @fdt: ptr to device tree
1230 * @nodeoffset: node to update
1231 * @phandle: phandle value to set (must be unique)
1233 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1238 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1240 if ((off
>= 0) && (off
!= nodeoffset
)) {
1243 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1244 printf("Trying to update node %s with phandle %u ",
1247 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1248 printf("that already exists in node %s.\n", buf
);
1249 return -FDT_ERR_BADPHANDLE
;
1253 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1258 * For now, also set the deprecated "linux,phandle" property, so that we
1259 * don't break older kernels.
1261 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1267 * fdt_create_phandle: Create a phandle property for the given node
1269 * @fdt: ptr to device tree
1270 * @nodeoffset: node to update
1272 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1274 /* see if there is a phandle already */
1275 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1277 /* if we got 0, means no phandle so create one */
1281 phandle
= fdt_alloc_phandle(fdt
);
1282 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1284 printf("Can't set phandle %u: %s\n", phandle
,
1294 * fdt_set_node_status: Set status for the given node
1296 * @fdt: ptr to device tree
1297 * @nodeoffset: node to update
1298 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1299 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1300 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1302 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1303 enum fdt_status status
, unsigned int error_code
)
1312 case FDT_STATUS_OKAY
:
1313 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1315 case FDT_STATUS_DISABLED
:
1316 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1318 case FDT_STATUS_FAIL
:
1319 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1321 case FDT_STATUS_FAIL_ERROR_CODE
:
1322 sprintf(buf
, "fail-%d", error_code
);
1323 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1326 printf("Invalid fdt status: %x\n", status
);
1335 * fdt_set_status_by_alias: Set status for the given node given an alias
1337 * @fdt: ptr to device tree
1338 * @alias: alias of node to update
1339 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1340 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1341 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1343 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1344 enum fdt_status status
, unsigned int error_code
)
1346 int offset
= fdt_path_offset(fdt
, alias
);
1348 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1351 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1352 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1357 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1358 if (noff
!= -FDT_ERR_NOTFOUND
) {
1359 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1361 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1362 if (ret
== -FDT_ERR_NOSPACE
) {
1363 ret
= fdt_increase_size(blob
, 512);
1368 } else if (ret
< 0) {
1369 printf("Can't add property: %s\n", fdt_strerror(ret
));
1375 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1381 * Verify the physical address of device tree node for a given alias
1383 * This function locates the device tree node of a given alias, and then
1384 * verifies that the physical address of that device matches the given
1385 * parameter. It displays a message if there is a mismatch.
1387 * Returns 1 on success, 0 on failure
1389 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1396 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1398 /* If there's no such alias, then it's not a failure */
1402 node
= fdt_path_offset(fdt
, path
);
1404 printf("Warning: device tree alias '%s' points to invalid "
1405 "node %s.\n", alias
, path
);
1409 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1411 printf("Warning: device tree node '%s' has no address.\n",
1416 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1417 if (addr
!= dt_addr
) {
1418 printf("Warning: U-Boot configured device %s at address %"
1419 PRIx64
",\n but the device tree has it address %"
1420 PRIx64
".\n", alias
, addr
, dt_addr
);
1428 * Returns the base address of an SOC or PCI node
1430 u64
fdt_get_base_address(void *fdt
, int node
)
1434 const fdt32_t
*prop
;
1436 naddr
= fdt_address_cells(fdt
, node
);
1438 prop
= fdt_getprop(fdt
, node
, "ranges", &size
);
1440 return prop
? fdt_translate_address(fdt
, node
, prop
+ naddr
) : 0;
1444 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1446 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1447 uint64_t *val
, int cells
)
1449 const fdt32_t
*prop32
= &prop
[cell_off
];
1450 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1452 if ((cell_off
+ cells
) > prop_len
)
1453 return -FDT_ERR_NOSPACE
;
1457 *val
= fdt32_to_cpu(*prop32
);
1460 *val
= fdt64_to_cpu(*prop64
);
1463 return -FDT_ERR_NOSPACE
;
1470 * fdt_read_range - Read a node's n'th range property
1472 * @fdt: ptr to device tree
1473 * @node: offset of node
1475 * @child_addr: pointer to storage for the "child address" field
1476 * @addr: pointer to storage for the CPU view translated physical start
1477 * @len: pointer to storage for the range length
1479 * Convenience function that reads and interprets a specific range out of
1480 * a number of the "ranges" property array.
1482 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1483 uint64_t *addr
, uint64_t *len
)
1485 int pnode
= fdt_parent_offset(fdt
, node
);
1486 const fdt32_t
*ranges
;
1495 * The "ranges" property is an array of
1496 * { <child address> <parent address> <size in child address space> }
1498 * All 3 elements can span a diffent number of cells. Fetch their size.
1500 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1501 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1502 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1504 /* Now try to get the ranges property */
1505 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1507 return -FDT_ERR_NOTFOUND
;
1508 ranges_len
/= sizeof(uint32_t);
1510 /* Jump to the n'th entry */
1511 cell
= n
* (pacells
+ acells
+ scells
);
1513 /* Read <child address> */
1515 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1522 /* Read <parent address> */
1524 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1527 /* Read <size in child address space> */
1529 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);
1538 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1540 * @fdt: ptr to device tree
1541 * @node: offset of the simplefb node
1542 * @base_address: framebuffer base address
1543 * @width: width in pixels
1544 * @height: height in pixels
1545 * @stride: bytes per line
1546 * @format: pixel format string
1548 * Convenience function to fill and enable a simplefb node.
1550 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
1551 u32 height
, u32 stride
, const char *format
)
1555 int i
, addrc
, sizec
, ret
;
1557 of_bus_default_count_cells(fdt
, fdt_parent_offset(fdt
, node
),
1561 cells
[i
++] = cpu_to_fdt32(base_address
>> 32);
1562 cells
[i
++] = cpu_to_fdt32(base_address
);
1565 cells
[i
++] = cpu_to_fdt32(height
* stride
);
1567 ret
= fdt_setprop(fdt
, node
, "reg", cells
, sizeof(cells
[0]) * i
);
1571 snprintf(name
, sizeof(name
), "framebuffer@%" PRIx64
, base_address
);
1572 ret
= fdt_set_name(fdt
, node
, name
);
1576 ret
= fdt_setprop_u32(fdt
, node
, "width", width
);
1580 ret
= fdt_setprop_u32(fdt
, node
, "height", height
);
1584 ret
= fdt_setprop_u32(fdt
, node
, "stride", stride
);
1588 ret
= fdt_setprop_string(fdt
, node
, "format", format
);
1592 ret
= fdt_setprop_string(fdt
, node
, "status", "okay");
1600 * Update native-mode in display-timings from display environment variable.
1601 * The node to update are specified by path.
1603 int fdt_fixup_display(void *blob
, const char *path
, const char *display
)
1607 if (!display
|| !path
)
1608 return -FDT_ERR_NOTFOUND
;
1610 toff
= fdt_path_offset(blob
, path
);
1612 toff
= fdt_subnode_offset(blob
, toff
, "display-timings");
1616 for (off
= fdt_first_subnode(blob
, toff
);
1618 off
= fdt_next_subnode(blob
, off
)) {
1619 uint32_t h
= fdt_get_phandle(blob
, off
);
1620 debug("%s:0x%x\n", fdt_get_name(blob
, off
, NULL
),
1622 if (strcasecmp(fdt_get_name(blob
, off
, NULL
), display
) == 0)
1623 return fdt_setprop_u32(blob
, toff
, "native-mode", h
);