3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <stdio_dev.h>
13 #include <linux/ctype.h>
14 #include <linux/types.h>
15 #include <asm/global_data.h>
17 #include <fdt_support.h>
21 * fdt_getprop_u32_default_node - Return a node's property or a default
23 * @fdt: ptr to device tree
24 * @off: offset of node
25 * @cell: cell offset in property
26 * @prop: property name
27 * @dflt: default value if the property isn't found
29 * Convenience function to return a node's property or a default value if
30 * the property doesn't exist.
32 u32
fdt_getprop_u32_default_node(const void *fdt
, int off
, int cell
,
33 const char *prop
, const u32 dflt
)
38 val
= fdt_getprop(fdt
, off
, prop
, &len
);
40 /* Check if property exists */
44 /* Check if property is long enough */
45 if (len
< ((cell
+ 1) * sizeof(uint32_t)))
48 return fdt32_to_cpu(*val
);
52 * fdt_getprop_u32_default - Find a node and return it's property or a default
54 * @fdt: ptr to device tree
56 * @prop: property name
57 * @dflt: default value if the property isn't found
59 * Convenience function to find a node and return it's property or a
60 * default value if it doesn't exist.
62 u32
fdt_getprop_u32_default(const void *fdt
, const char *path
,
63 const char *prop
, const u32 dflt
)
67 off
= fdt_path_offset(fdt
, path
);
71 return fdt_getprop_u32_default_node(fdt
, off
, 0, prop
, dflt
);
75 * fdt_find_and_setprop: Find a node and set it's property
77 * @fdt: ptr to device tree
79 * @prop: property name
80 * @val: ptr to new value
81 * @len: length of new property value
82 * @create: flag to create the property if it doesn't exist
84 * Convenience function to directly set a property given the path to the node.
86 int fdt_find_and_setprop(void *fdt
, const char *node
, const char *prop
,
87 const void *val
, int len
, int create
)
89 int nodeoff
= fdt_path_offset(fdt
, node
);
94 if ((!create
) && (fdt_get_property(fdt
, nodeoff
, prop
, NULL
) == NULL
))
95 return 0; /* create flag not set; so exit quietly */
97 return fdt_setprop(fdt
, nodeoff
, prop
, val
, len
);
101 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
103 * @fdt: pointer to the device tree blob
104 * @parentoffset: structure block offset of a node
105 * @name: name of the subnode to locate
107 * fdt_subnode_offset() finds a subnode of the node with a given name.
108 * If the subnode does not exist, it will be created.
110 int fdt_find_or_add_subnode(void *fdt
, int parentoffset
, const char *name
)
114 offset
= fdt_subnode_offset(fdt
, parentoffset
, name
);
116 if (offset
== -FDT_ERR_NOTFOUND
)
117 offset
= fdt_add_subnode(fdt
, parentoffset
, name
);
120 printf("%s: %s: %s\n", __func__
, name
, fdt_strerror(offset
));
125 /* rename to CONFIG_OF_STDOUT_PATH ? */
126 #if defined(OF_STDOUT_PATH)
127 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
129 return fdt_setprop(fdt
, chosenoff
, "linux,stdout-path",
130 OF_STDOUT_PATH
, strlen(OF_STDOUT_PATH
) + 1);
132 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
133 static void fdt_fill_multisername(char *sername
, size_t maxlen
)
135 const char *outname
= stdio_devices
[stdout
]->name
;
137 if (strcmp(outname
, "serial") > 0)
138 strncpy(sername
, outname
, maxlen
);
141 if (strcmp(outname
+ 1, "serial") > 0)
142 strncpy(sername
, outname
+ 1, maxlen
);
145 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
149 char sername
[9] = { 0 };
152 char tmp
[256]; /* long enough */
154 fdt_fill_multisername(sername
, sizeof(sername
) - 1);
156 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
158 aliasoff
= fdt_path_offset(fdt
, "/aliases");
164 path
= fdt_getprop(fdt
, aliasoff
, sername
, &len
);
170 /* fdt_setprop may break "path" so we copy it to tmp buffer */
171 memcpy(tmp
, path
, len
);
173 err
= fdt_setprop(fdt
, chosenoff
, "linux,stdout-path", tmp
, len
);
176 printf("WARNING: could not set linux,stdout-path %s.\n",
182 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
188 static inline int fdt_setprop_uxx(void *fdt
, int nodeoffset
, const char *name
,
189 uint64_t val
, int is_u64
)
192 return fdt_setprop_u64(fdt
, nodeoffset
, name
, val
);
194 return fdt_setprop_u32(fdt
, nodeoffset
, name
, (uint32_t)val
);
197 int fdt_root(void *fdt
)
202 err
= fdt_check_header(fdt
);
204 printf("fdt_root: %s\n", fdt_strerror(err
));
208 serial
= getenv("serial#");
210 err
= fdt_setprop(fdt
, 0, "serial-number", serial
,
214 printf("WARNING: could not set serial-number %s.\n",
223 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
)
230 /* just return if the size of initrd is zero */
231 if (initrd_start
== initrd_end
)
234 /* find or create "/chosen" node. */
235 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
239 total
= fdt_num_mem_rsv(fdt
);
242 * Look for an existing entry and update it. If we don't find
243 * the entry, we will j be the next available slot.
245 for (j
= 0; j
< total
; j
++) {
246 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
247 if (addr
== initrd_start
) {
248 fdt_del_mem_rsv(fdt
, j
);
253 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
255 printf("fdt_initrd: %s\n", fdt_strerror(err
));
259 is_u64
= (fdt_address_cells(fdt
, 0) == 2);
261 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-start",
262 (uint64_t)initrd_start
, is_u64
);
265 printf("WARNING: could not set linux,initrd-start %s.\n",
270 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-end",
271 (uint64_t)initrd_end
, is_u64
);
274 printf("WARNING: could not set linux,initrd-end %s.\n",
283 int fdt_chosen(void *fdt
)
287 char *str
; /* used to set string properties */
289 err
= fdt_check_header(fdt
);
291 printf("fdt_chosen: %s\n", fdt_strerror(err
));
295 /* find or create "/chosen" node. */
296 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
300 str
= getenv("bootargs");
302 err
= fdt_setprop(fdt
, nodeoffset
, "bootargs", str
,
305 printf("WARNING: could not set bootargs %s.\n",
311 return fdt_fixup_stdout(fdt
, nodeoffset
);
314 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
315 const void *val
, int len
, int create
)
319 debug("Updating property '%s/%s' = ", path
, prop
);
320 for (i
= 0; i
< len
; i
++)
321 debug(" %.2x", *(u8
*)(val
+i
));
324 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
326 printf("Unable to update property %s:%s, err=%s\n",
327 path
, prop
, fdt_strerror(rc
));
330 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
333 fdt32_t tmp
= cpu_to_fdt32(val
);
334 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
337 void do_fixup_by_prop(void *fdt
,
338 const char *pname
, const void *pval
, int plen
,
339 const char *prop
, const void *val
, int len
,
345 debug("Updating property '%s' = ", prop
);
346 for (i
= 0; i
< len
; i
++)
347 debug(" %.2x", *(u8
*)(val
+i
));
350 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
351 while (off
!= -FDT_ERR_NOTFOUND
) {
352 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
353 fdt_setprop(fdt
, off
, prop
, val
, len
);
354 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
358 void do_fixup_by_prop_u32(void *fdt
,
359 const char *pname
, const void *pval
, int plen
,
360 const char *prop
, u32 val
, int create
)
362 fdt32_t tmp
= cpu_to_fdt32(val
);
363 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
366 void do_fixup_by_compat(void *fdt
, const char *compat
,
367 const char *prop
, const void *val
, int len
, int create
)
372 debug("Updating property '%s' = ", prop
);
373 for (i
= 0; i
< len
; i
++)
374 debug(" %.2x", *(u8
*)(val
+i
));
377 off
= fdt_node_offset_by_compatible(fdt
, -1, compat
);
378 while (off
!= -FDT_ERR_NOTFOUND
) {
379 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
380 fdt_setprop(fdt
, off
, prop
, val
, len
);
381 off
= fdt_node_offset_by_compatible(fdt
, off
, compat
);
385 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
386 const char *prop
, u32 val
, int create
)
388 fdt32_t tmp
= cpu_to_fdt32(val
);
389 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
393 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
395 static int fdt_pack_reg(const void *fdt
, void *buf
, u64
*address
, u64
*size
,
399 int address_cells
= fdt_address_cells(fdt
, 0);
400 int size_cells
= fdt_size_cells(fdt
, 0);
403 for (i
= 0; i
< n
; i
++) {
404 if (address_cells
== 2)
405 *(fdt64_t
*)p
= cpu_to_fdt64(address
[i
]);
407 *(fdt32_t
*)p
= cpu_to_fdt32(address
[i
]);
408 p
+= 4 * address_cells
;
411 *(fdt64_t
*)p
= cpu_to_fdt64(size
[i
]);
413 *(fdt32_t
*)p
= cpu_to_fdt32(size
[i
]);
417 return p
- (char *)buf
;
420 #ifdef CONFIG_NR_DRAM_BANKS
421 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
423 #define MEMORY_BANKS_MAX 4
425 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
429 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
431 if (banks
> MEMORY_BANKS_MAX
) {
432 printf("%s: num banks %d exceeds hardcoded limit %d."
433 " Recompile with higher MEMORY_BANKS_MAX?\n",
434 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
438 err
= fdt_check_header(blob
);
440 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
444 /* find or create "/memory" node. */
445 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
449 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
452 printf("WARNING: could not set %s %s.\n", "device_type",
460 len
= fdt_pack_reg(blob
, tmp
, start
, size
, banks
);
462 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
464 printf("WARNING: could not set %s %s.\n",
465 "reg", fdt_strerror(err
));
471 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
473 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
476 void fdt_fixup_ethernet(void *fdt
)
479 char enet
[16], *tmp
, *end
;
482 unsigned char mac_addr
[6];
484 node
= fdt_path_offset(fdt
, "/aliases");
488 if (!getenv("ethaddr")) {
489 if (getenv("usbethaddr")) {
490 strcpy(mac
, "usbethaddr");
492 debug("No ethernet MAC Address defined\n");
496 strcpy(mac
, "ethaddr");
500 while ((tmp
= getenv(mac
)) != NULL
) {
501 sprintf(enet
, "ethernet%d", i
);
502 path
= fdt_getprop(fdt
, node
, enet
, NULL
);
504 debug("No alias for %s\n", enet
);
505 sprintf(mac
, "eth%daddr", ++i
);
509 for (j
= 0; j
< 6; j
++) {
510 mac_addr
[j
] = tmp
? simple_strtoul(tmp
, &end
, 16) : 0;
512 tmp
= (*end
) ? end
+1 : end
;
515 do_fixup_by_path(fdt
, path
, "mac-address", &mac_addr
, 6, 0);
516 do_fixup_by_path(fdt
, path
, "local-mac-address",
519 sprintf(mac
, "eth%daddr", ++i
);
523 /* Resize the fdt to its actual size + a bit of padding */
524 int fdt_shrink_to_minimum(void *blob
)
534 total
= fdt_num_mem_rsv(blob
);
535 for (i
= 0; i
< total
; i
++) {
536 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
537 if (addr
== (uintptr_t)blob
) {
538 fdt_del_mem_rsv(blob
, i
);
544 * Calculate the actual size of the fdt
545 * plus the size needed for 5 fdt_add_mem_rsv, one
546 * for the fdt itself and 4 for a possible initrd
547 * ((initrd-start + initrd-end) * 2 (name & value))
549 actualsize
= fdt_off_dt_strings(blob
) +
550 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
552 /* Make it so the fdt ends on a page boundary */
553 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
554 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
556 /* Change the fdt header to reflect the correct size */
557 fdt_set_totalsize(blob
, actualsize
);
559 /* Add the new reservation */
560 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
568 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
570 #define FDT_PCI_PREFETCH (0x40000000)
571 #define FDT_PCI_MEM32 (0x02000000)
572 #define FDT_PCI_IO (0x01000000)
573 #define FDT_PCI_MEM64 (0x03000000)
575 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
577 int addrcell
, sizecell
, len
, r
;
579 /* sized based on pci addr cells, size-cells, & address-cells */
580 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
582 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
583 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
585 dma_range
= &dma_ranges
[0];
586 for (r
= 0; r
< hose
->region_count
; r
++) {
587 u64 bus_start
, phys_start
, size
;
589 /* skip if !PCI_REGION_SYS_MEMORY */
590 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
593 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
594 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
595 size
= (u64
)hose
->regions
[r
].size
;
598 if (size
>= 0x100000000ull
)
599 dma_range
[0] |= FDT_PCI_MEM64
;
601 dma_range
[0] |= FDT_PCI_MEM32
;
602 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
603 dma_range
[0] |= FDT_PCI_PREFETCH
;
604 #ifdef CONFIG_SYS_PCI_64BIT
605 dma_range
[1] = bus_start
>> 32;
609 dma_range
[2] = bus_start
& 0xffffffff;
612 dma_range
[3] = phys_start
>> 32;
613 dma_range
[4] = phys_start
& 0xffffffff;
615 dma_range
[3] = phys_start
& 0xffffffff;
619 dma_range
[3 + addrcell
+ 0] = size
>> 32;
620 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
622 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
625 dma_range
+= (3 + addrcell
+ sizecell
);
628 len
= dma_range
- &dma_ranges
[0];
630 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
636 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
638 * Provide a weak default function to return the flash bank size.
639 * There might be multiple non-identical flash chips connected to one
640 * chip-select, so we need to pass an index as well.
642 u32
__flash_get_bank_size(int cs
, int idx
)
644 extern flash_info_t flash_info
[];
647 * As default, a simple 1:1 mapping is provided. Boards with
648 * a different mapping need to supply a board specific mapping
651 return flash_info
[cs
].size
;
653 u32
flash_get_bank_size(int cs
, int idx
)
654 __attribute__((weak
, alias("__flash_get_bank_size")));
657 * This function can be used to update the size in the "reg" property
658 * of all NOR FLASH device nodes. This is necessary for boards with
659 * non-fixed NOR FLASH sizes.
661 int fdt_fixup_nor_flash_size(void *blob
)
663 char compat
[][16] = { "cfi-flash", "jedec-flash" };
666 struct fdt_property
*prop
;
670 for (i
= 0; i
< 2; i
++) {
671 off
= fdt_node_offset_by_compatible(blob
, -1, compat
[i
]);
672 while (off
!= -FDT_ERR_NOTFOUND
) {
676 * Found one compatible node, so fixup the size
677 * int its reg properties
679 prop
= fdt_get_property_w(blob
, off
, "reg", &len
);
681 int tuple_size
= 3 * sizeof(reg
);
684 * There might be multiple reg-tuples,
685 * so loop through them all
687 reg
= reg2
= (u32
*)&prop
->data
[0];
688 for (idx
= 0; idx
< (len
/ tuple_size
); idx
++) {
690 * Update size in reg property
692 reg
[2] = flash_get_bank_size(reg
[0],
696 * Point to next reg tuple
701 fdt_setprop(blob
, off
, "reg", reg2
, len
);
704 /* Move to next compatible node */
705 off
= fdt_node_offset_by_compatible(blob
, off
,
714 int fdt_increase_size(void *fdt
, int add_len
)
718 newlen
= fdt_totalsize(fdt
) + add_len
;
720 /* Open in place with a new len */
721 return fdt_open_into(fdt
, fdt
, newlen
);
724 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
725 #include <jffs2/load_kernel.h>
726 #include <mtd_node.h>
733 int fdt_del_subnodes(const void *blob
, int parent_offset
)
738 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
739 (off
>= 0) && (ndepth
> 0);
740 off
= fdt_next_node(blob
, off
, &ndepth
)) {
742 debug("delete %s: offset: %x\n",
743 fdt_get_name(blob
, off
, 0), off
);
744 ret
= fdt_del_node((void *)blob
, off
);
746 printf("Can't delete node: %s\n",
758 int fdt_del_partitions(void *blob
, int parent_offset
)
765 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
766 if (off
> 0 && ndepth
== 1) {
767 prop
= fdt_getprop(blob
, off
, "label", NULL
);
770 * Could not find label property, nand {}; node?
771 * Check subnode, delete partitions there if any.
773 return fdt_del_partitions(blob
, off
);
775 ret
= fdt_del_subnodes(blob
, parent_offset
);
777 printf("Can't remove subnodes: %s\n",
786 int fdt_node_set_part_info(void *blob
, int parent_offset
,
787 struct mtd_device
*dev
)
789 struct list_head
*pentry
;
790 struct part_info
*part
;
791 struct reg_cell cell
;
796 ret
= fdt_del_partitions(blob
, parent_offset
);
801 * Check if it is nand {}; subnode, adjust
802 * the offset in this case
804 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
805 if (off
> 0 && ndepth
== 1)
809 list_for_each_prev(pentry
, &dev
->parts
) {
812 part
= list_entry(pentry
, struct part_info
, link
);
814 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
815 part_num
, part
->name
, part
->size
,
816 part
->offset
, part
->mask_flags
);
818 sprintf(buf
, "partition@%llx", part
->offset
);
820 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
821 if (ret
== -FDT_ERR_NOSPACE
) {
822 ret
= fdt_increase_size(blob
, 512);
827 } else if (ret
< 0) {
828 printf("Can't add partition node: %s\n",
834 /* Check MTD_WRITEABLE_CMD flag */
835 if (part
->mask_flags
& 1) {
837 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
838 if (ret
== -FDT_ERR_NOSPACE
) {
839 ret
= fdt_increase_size(blob
, 512);
848 cell
.r0
= cpu_to_fdt32(part
->offset
);
849 cell
.r1
= cpu_to_fdt32(part
->size
);
851 ret
= fdt_setprop(blob
, newoff
, "reg", &cell
, sizeof(cell
));
852 if (ret
== -FDT_ERR_NOSPACE
) {
853 ret
= fdt_increase_size(blob
, 512);
862 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
863 if (ret
== -FDT_ERR_NOSPACE
) {
864 ret
= fdt_increase_size(blob
, 512);
876 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
879 printf("Can't add property: %s\n", fdt_strerror(ret
));
884 * Update partitions in nor/nand nodes using info from
885 * mtdparts environment variable. The nodes to update are
886 * specified by node_info structure which contains mtd device
887 * type and compatible string: E. g. the board code in
888 * ft_board_setup() could use:
890 * struct node_info nodes[] = {
891 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
892 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
895 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
897 void fdt_fixup_mtdparts(void *blob
, void *node_info
, int node_info_size
)
899 struct node_info
*ni
= node_info
;
900 struct mtd_device
*dev
;
905 parts
= getenv("mtdparts");
909 if (mtdparts_init() != 0)
912 for (i
= 0; i
< node_info_size
; i
++) {
914 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
915 while (noff
!= -FDT_ERR_NOTFOUND
) {
916 debug("%s: %s, mtd dev type %d\n",
917 fdt_get_name(blob
, noff
, 0),
918 ni
[i
].compat
, ni
[i
].type
);
919 dev
= device_find(ni
[i
].type
, idx
++);
921 if (fdt_node_set_part_info(blob
, noff
, dev
))
922 return; /* return on error */
925 /* Jump to next flash node */
926 noff
= fdt_node_offset_by_compatible(blob
, noff
,
933 void fdt_del_node_and_alias(void *blob
, const char *alias
)
935 int off
= fdt_path_offset(blob
, alias
);
940 fdt_del_node(blob
, off
);
942 off
= fdt_path_offset(blob
, "/aliases");
943 fdt_delprop(blob
, off
, alias
);
946 /* Max address size we deal with */
947 #define OF_MAX_ADDR_CELLS 4
948 #define OF_BAD_ADDR ((u64)-1)
949 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
954 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
958 printf(" %08x", *(addr
++));
962 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
965 /* Callbacks for bus specific translators */
968 const char *addresses
;
969 void (*count_cells
)(void *blob
, int parentoffset
,
970 int *addrc
, int *sizec
);
971 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
972 int na
, int ns
, int pna
);
973 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
976 /* Default translator (generic bus) */
977 void of_bus_default_count_cells(void *blob
, int parentoffset
,
978 int *addrc
, int *sizec
)
983 *addrc
= fdt_address_cells(blob
, parentoffset
);
986 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
988 *sizec
= be32_to_cpup(prop
);
994 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
995 int na
, int ns
, int pna
)
999 cp
= of_read_number(range
, na
);
1000 s
= of_read_number(range
+ na
+ pna
, ns
);
1001 da
= of_read_number(addr
, na
);
1003 debug("OF: default map, cp=%" PRIu64
", s=%" PRIu64
1004 ", da=%" PRIu64
"\n", cp
, s
, da
);
1006 if (da
< cp
|| da
>= (cp
+ s
))
1011 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
1013 u64 a
= of_read_number(addr
, na
);
1014 memset(addr
, 0, na
* 4);
1017 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
1018 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
1023 /* Array of bus specific translators */
1024 static struct of_bus of_busses
[] = {
1029 .count_cells
= of_bus_default_count_cells
,
1030 .map
= of_bus_default_map
,
1031 .translate
= of_bus_default_translate
,
1035 static int of_translate_one(void * blob
, int parent
, struct of_bus
*bus
,
1036 struct of_bus
*pbus
, fdt32_t
*addr
,
1037 int na
, int ns
, int pna
, const char *rprop
)
1039 const fdt32_t
*ranges
;
1042 u64 offset
= OF_BAD_ADDR
;
1044 /* Normally, an absence of a "ranges" property means we are
1045 * crossing a non-translatable boundary, and thus the addresses
1046 * below the current not cannot be converted to CPU physical ones.
1047 * Unfortunately, while this is very clear in the spec, it's not
1048 * what Apple understood, and they do have things like /uni-n or
1049 * /ht nodes with no "ranges" property and a lot of perfectly
1050 * useable mapped devices below them. Thus we treat the absence of
1051 * "ranges" as equivalent to an empty "ranges" property which means
1052 * a 1:1 translation at that level. It's up to the caller not to try
1053 * to translate addresses that aren't supposed to be translated in
1054 * the first place. --BenH.
1056 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1057 if (ranges
== NULL
|| rlen
== 0) {
1058 offset
= of_read_number(addr
, na
);
1059 memset(addr
, 0, pna
* 4);
1060 debug("OF: no ranges, 1:1 translation\n");
1064 debug("OF: walking ranges...\n");
1066 /* Now walk through the ranges */
1068 rone
= na
+ pna
+ ns
;
1069 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1070 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1071 if (offset
!= OF_BAD_ADDR
)
1074 if (offset
== OF_BAD_ADDR
) {
1075 debug("OF: not found !\n");
1078 memcpy(addr
, ranges
+ na
, 4 * pna
);
1081 of_dump_addr("OF: parent translation for:", addr
, pna
);
1082 debug("OF: with offset: %" PRIu64
"\n", offset
);
1084 /* Translate it into parent bus space */
1085 return pbus
->translate(addr
, offset
, pna
);
1089 * Translate an address from the device-tree into a CPU physical address,
1090 * this walks up the tree and applies the various bus mappings on the
1093 * Note: We consider that crossing any level with #size-cells == 0 to mean
1094 * that translation is impossible (that is we are not dealing with a value
1095 * that can be mapped to a cpu physical address). This is not really specified
1096 * that way, but this is traditionally the way IBM at least do things
1098 static u64
__of_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
,
1102 struct of_bus
*bus
, *pbus
;
1103 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1104 int na
, ns
, pna
, pns
;
1105 u64 result
= OF_BAD_ADDR
;
1107 debug("OF: ** translation for device %s **\n",
1108 fdt_get_name(blob
, node_offset
, NULL
));
1110 /* Get parent & match bus type */
1111 parent
= fdt_parent_offset(blob
, node_offset
);
1114 bus
= &of_busses
[0];
1116 /* Cound address cells & copy address locally */
1117 bus
->count_cells(blob
, parent
, &na
, &ns
);
1118 if (!OF_CHECK_COUNTS(na
, ns
)) {
1119 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1120 fdt_get_name(blob
, node_offset
, NULL
));
1123 memcpy(addr
, in_addr
, na
* 4);
1125 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1126 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1127 of_dump_addr("OF: translating address:", addr
, na
);
1131 /* Switch to parent bus */
1132 node_offset
= parent
;
1133 parent
= fdt_parent_offset(blob
, node_offset
);
1135 /* If root, we have finished */
1137 debug("OF: reached root node\n");
1138 result
= of_read_number(addr
, na
);
1142 /* Get new parent bus and counts */
1143 pbus
= &of_busses
[0];
1144 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1145 if (!OF_CHECK_COUNTS(pna
, pns
)) {
1146 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1147 fdt_get_name(blob
, node_offset
, NULL
));
1151 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1152 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1154 /* Apply bus translation */
1155 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1156 addr
, na
, ns
, pna
, rprop
))
1159 /* Complete the move up one level */
1164 of_dump_addr("OF: one level translation:", addr
, na
);
1171 u64
fdt_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
)
1173 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1177 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1178 * who's reg property matches a physical cpu address
1180 * @blob: ptr to device tree
1181 * @compat: compatiable string to match
1182 * @compat_off: property name
1185 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1186 phys_addr_t compat_off
)
1188 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1189 while (off
!= -FDT_ERR_NOTFOUND
) {
1190 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1192 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1195 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1198 return -FDT_ERR_NOTFOUND
;
1202 * fdt_alloc_phandle: Return next free phandle value
1204 * @blob: ptr to device tree
1206 int fdt_alloc_phandle(void *blob
)
1209 uint32_t phandle
= 0;
1211 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1212 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1213 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1220 * fdt_set_phandle: Create a phandle property for the given node
1222 * @fdt: ptr to device tree
1223 * @nodeoffset: node to update
1224 * @phandle: phandle value to set (must be unique)
1226 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1231 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1233 if ((off
>= 0) && (off
!= nodeoffset
)) {
1236 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1237 printf("Trying to update node %s with phandle %u ",
1240 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1241 printf("that already exists in node %s.\n", buf
);
1242 return -FDT_ERR_BADPHANDLE
;
1246 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1251 * For now, also set the deprecated "linux,phandle" property, so that we
1252 * don't break older kernels.
1254 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1260 * fdt_create_phandle: Create a phandle property for the given node
1262 * @fdt: ptr to device tree
1263 * @nodeoffset: node to update
1265 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1267 /* see if there is a phandle already */
1268 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1270 /* if we got 0, means no phandle so create one */
1274 phandle
= fdt_alloc_phandle(fdt
);
1275 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1277 printf("Can't set phandle %u: %s\n", phandle
,
1287 * fdt_set_node_status: Set status for the given node
1289 * @fdt: ptr to device tree
1290 * @nodeoffset: node to update
1291 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1292 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1293 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1295 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1296 enum fdt_status status
, unsigned int error_code
)
1305 case FDT_STATUS_OKAY
:
1306 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1308 case FDT_STATUS_DISABLED
:
1309 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1311 case FDT_STATUS_FAIL
:
1312 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1314 case FDT_STATUS_FAIL_ERROR_CODE
:
1315 sprintf(buf
, "fail-%d", error_code
);
1316 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1319 printf("Invalid fdt status: %x\n", status
);
1328 * fdt_set_status_by_alias: Set status for the given node given an alias
1330 * @fdt: ptr to device tree
1331 * @alias: alias of node to update
1332 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1333 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1334 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1336 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1337 enum fdt_status status
, unsigned int error_code
)
1339 int offset
= fdt_path_offset(fdt
, alias
);
1341 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1344 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1345 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1350 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1351 if (noff
!= -FDT_ERR_NOTFOUND
) {
1352 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1354 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1355 if (ret
== -FDT_ERR_NOSPACE
) {
1356 ret
= fdt_increase_size(blob
, 512);
1361 } else if (ret
< 0) {
1362 printf("Can't add property: %s\n", fdt_strerror(ret
));
1368 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1374 * Verify the physical address of device tree node for a given alias
1376 * This function locates the device tree node of a given alias, and then
1377 * verifies that the physical address of that device matches the given
1378 * parameter. It displays a message if there is a mismatch.
1380 * Returns 1 on success, 0 on failure
1382 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1389 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1391 /* If there's no such alias, then it's not a failure */
1395 node
= fdt_path_offset(fdt
, path
);
1397 printf("Warning: device tree alias '%s' points to invalid "
1398 "node %s.\n", alias
, path
);
1402 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1404 printf("Warning: device tree node '%s' has no address.\n",
1409 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1410 if (addr
!= dt_addr
) {
1411 printf("Warning: U-Boot configured device %s at address %"
1412 PRIx64
",\n but the device tree has it address %"
1413 PRIx64
".\n", alias
, addr
, dt_addr
);
1421 * Returns the base address of an SOC or PCI node
1423 u64
fdt_get_base_address(void *fdt
, int node
)
1427 const fdt32_t
*prop
;
1429 naddr
= fdt_address_cells(fdt
, node
);
1431 prop
= fdt_getprop(fdt
, node
, "ranges", &size
);
1433 return prop
? fdt_translate_address(fdt
, node
, prop
+ naddr
) : 0;
1437 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1439 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1440 uint64_t *val
, int cells
)
1442 const fdt32_t
*prop32
= &prop
[cell_off
];
1443 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1445 if ((cell_off
+ cells
) > prop_len
)
1446 return -FDT_ERR_NOSPACE
;
1450 *val
= fdt32_to_cpu(*prop32
);
1453 *val
= fdt64_to_cpu(*prop64
);
1456 return -FDT_ERR_NOSPACE
;
1463 * fdt_read_range - Read a node's n'th range property
1465 * @fdt: ptr to device tree
1466 * @node: offset of node
1468 * @child_addr: pointer to storage for the "child address" field
1469 * @addr: pointer to storage for the CPU view translated physical start
1470 * @len: pointer to storage for the range length
1472 * Convenience function that reads and interprets a specific range out of
1473 * a number of the "ranges" property array.
1475 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1476 uint64_t *addr
, uint64_t *len
)
1478 int pnode
= fdt_parent_offset(fdt
, node
);
1479 const fdt32_t
*ranges
;
1488 * The "ranges" property is an array of
1489 * { <child address> <parent address> <size in child address space> }
1491 * All 3 elements can span a diffent number of cells. Fetch their size.
1493 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1494 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1495 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1497 /* Now try to get the ranges property */
1498 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1500 return -FDT_ERR_NOTFOUND
;
1501 ranges_len
/= sizeof(uint32_t);
1503 /* Jump to the n'th entry */
1504 cell
= n
* (pacells
+ acells
+ scells
);
1506 /* Read <child address> */
1508 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1515 /* Read <parent address> */
1517 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1520 /* Read <size in child address space> */
1522 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);
1531 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1533 * @fdt: ptr to device tree
1534 * @node: offset of the simplefb node
1535 * @base_address: framebuffer base address
1536 * @width: width in pixels
1537 * @height: height in pixels
1538 * @stride: bytes per line
1539 * @format: pixel format string
1541 * Convenience function to fill and enable a simplefb node.
1543 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
1544 u32 height
, u32 stride
, const char *format
)
1548 int i
, addrc
, sizec
, ret
;
1550 of_bus_default_count_cells(fdt
, fdt_parent_offset(fdt
, node
),
1554 cells
[i
++] = cpu_to_fdt32(base_address
>> 32);
1555 cells
[i
++] = cpu_to_fdt32(base_address
);
1558 cells
[i
++] = cpu_to_fdt32(height
* stride
);
1560 ret
= fdt_setprop(fdt
, node
, "reg", cells
, sizeof(cells
[0]) * i
);
1564 snprintf(name
, sizeof(name
), "framebuffer@%" PRIx64
, base_address
);
1565 ret
= fdt_set_name(fdt
, node
, name
);
1569 ret
= fdt_setprop_u32(fdt
, node
, "width", width
);
1573 ret
= fdt_setprop_u32(fdt
, node
, "height", height
);
1577 ret
= fdt_setprop_u32(fdt
, node
, "stride", stride
);
1581 ret
= fdt_setprop_string(fdt
, node
, "format", format
);
1585 ret
= fdt_setprop_string(fdt
, node
, "status", "okay");
1593 * Update native-mode in display-timings from display environment variable.
1594 * The node to update are specified by path.
1596 int fdt_fixup_display(void *blob
, const char *path
, const char *display
)
1600 if (!display
|| !path
)
1601 return -FDT_ERR_NOTFOUND
;
1603 toff
= fdt_path_offset(blob
, path
);
1605 toff
= fdt_subnode_offset(blob
, toff
, "display-timings");
1609 for (off
= fdt_first_subnode(blob
, toff
);
1611 off
= fdt_next_subnode(blob
, off
)) {
1612 uint32_t h
= fdt_get_phandle(blob
, off
);
1613 debug("%s:0x%x\n", fdt_get_name(blob
, off
, NULL
),
1615 if (strcasecmp(fdt_get_name(blob
, off
, NULL
), display
) == 0)
1616 return fdt_setprop_u32(blob
, toff
, "native-mode", h
);