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
)
485 char enet
[16], *tmp
, *end
;
488 unsigned char mac_addr
[6];
490 node
= fdt_path_offset(fdt
, "/aliases");
494 if (!getenv("ethaddr")) {
495 if (getenv("usbethaddr")) {
496 strcpy(mac
, "usbethaddr");
498 debug("No ethernet MAC Address defined\n");
502 strcpy(mac
, "ethaddr");
506 while ((tmp
= getenv(mac
)) != NULL
) {
507 sprintf(enet
, "ethernet%d", i
);
508 path
= fdt_getprop(fdt
, node
, enet
, NULL
);
510 debug("No alias for %s\n", enet
);
511 sprintf(mac
, "eth%daddr", ++i
);
515 for (j
= 0; j
< 6; j
++) {
516 mac_addr
[j
] = tmp
? simple_strtoul(tmp
, &end
, 16) : 0;
518 tmp
= (*end
) ? end
+1 : end
;
521 do_fixup_by_path(fdt
, path
, "mac-address", &mac_addr
, 6, 0);
522 do_fixup_by_path(fdt
, path
, "local-mac-address",
525 sprintf(mac
, "eth%daddr", ++i
);
529 /* Resize the fdt to its actual size + a bit of padding */
530 int fdt_shrink_to_minimum(void *blob
)
540 total
= fdt_num_mem_rsv(blob
);
541 for (i
= 0; i
< total
; i
++) {
542 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
543 if (addr
== (uintptr_t)blob
) {
544 fdt_del_mem_rsv(blob
, i
);
550 * Calculate the actual size of the fdt
551 * plus the size needed for 5 fdt_add_mem_rsv, one
552 * for the fdt itself and 4 for a possible initrd
553 * ((initrd-start + initrd-end) * 2 (name & value))
555 actualsize
= fdt_off_dt_strings(blob
) +
556 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
558 /* Make it so the fdt ends on a page boundary */
559 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
560 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
562 /* Change the fdt header to reflect the correct size */
563 fdt_set_totalsize(blob
, actualsize
);
565 /* Add the new reservation */
566 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
574 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
576 #define FDT_PCI_PREFETCH (0x40000000)
577 #define FDT_PCI_MEM32 (0x02000000)
578 #define FDT_PCI_IO (0x01000000)
579 #define FDT_PCI_MEM64 (0x03000000)
581 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
583 int addrcell
, sizecell
, len
, r
;
585 /* sized based on pci addr cells, size-cells, & address-cells */
586 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
588 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
589 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
591 dma_range
= &dma_ranges
[0];
592 for (r
= 0; r
< hose
->region_count
; r
++) {
593 u64 bus_start
, phys_start
, size
;
595 /* skip if !PCI_REGION_SYS_MEMORY */
596 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
599 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
600 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
601 size
= (u64
)hose
->regions
[r
].size
;
604 if (size
>= 0x100000000ull
)
605 dma_range
[0] |= FDT_PCI_MEM64
;
607 dma_range
[0] |= FDT_PCI_MEM32
;
608 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
609 dma_range
[0] |= FDT_PCI_PREFETCH
;
610 #ifdef CONFIG_SYS_PCI_64BIT
611 dma_range
[1] = bus_start
>> 32;
615 dma_range
[2] = bus_start
& 0xffffffff;
618 dma_range
[3] = phys_start
>> 32;
619 dma_range
[4] = phys_start
& 0xffffffff;
621 dma_range
[3] = phys_start
& 0xffffffff;
625 dma_range
[3 + addrcell
+ 0] = size
>> 32;
626 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
628 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
631 dma_range
+= (3 + addrcell
+ sizecell
);
634 len
= dma_range
- &dma_ranges
[0];
636 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
642 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
644 * Provide a weak default function to return the flash bank size.
645 * There might be multiple non-identical flash chips connected to one
646 * chip-select, so we need to pass an index as well.
648 u32
__flash_get_bank_size(int cs
, int idx
)
650 extern flash_info_t flash_info
[];
653 * As default, a simple 1:1 mapping is provided. Boards with
654 * a different mapping need to supply a board specific mapping
657 return flash_info
[cs
].size
;
659 u32
flash_get_bank_size(int cs
, int idx
)
660 __attribute__((weak
, alias("__flash_get_bank_size")));
663 * This function can be used to update the size in the "reg" property
664 * of all NOR FLASH device nodes. This is necessary for boards with
665 * non-fixed NOR FLASH sizes.
667 int fdt_fixup_nor_flash_size(void *blob
)
669 char compat
[][16] = { "cfi-flash", "jedec-flash" };
672 struct fdt_property
*prop
;
676 for (i
= 0; i
< 2; i
++) {
677 off
= fdt_node_offset_by_compatible(blob
, -1, compat
[i
]);
678 while (off
!= -FDT_ERR_NOTFOUND
) {
682 * Found one compatible node, so fixup the size
683 * int its reg properties
685 prop
= fdt_get_property_w(blob
, off
, "reg", &len
);
687 int tuple_size
= 3 * sizeof(reg
);
690 * There might be multiple reg-tuples,
691 * so loop through them all
693 reg
= reg2
= (u32
*)&prop
->data
[0];
694 for (idx
= 0; idx
< (len
/ tuple_size
); idx
++) {
696 * Update size in reg property
698 reg
[2] = flash_get_bank_size(reg
[0],
702 * Point to next reg tuple
707 fdt_setprop(blob
, off
, "reg", reg2
, len
);
710 /* Move to next compatible node */
711 off
= fdt_node_offset_by_compatible(blob
, off
,
720 int fdt_increase_size(void *fdt
, int add_len
)
724 newlen
= fdt_totalsize(fdt
) + add_len
;
726 /* Open in place with a new len */
727 return fdt_open_into(fdt
, fdt
, newlen
);
730 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
731 #include <jffs2/load_kernel.h>
732 #include <mtd_node.h>
739 int fdt_del_subnodes(const void *blob
, int parent_offset
)
744 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
745 (off
>= 0) && (ndepth
> 0);
746 off
= fdt_next_node(blob
, off
, &ndepth
)) {
748 debug("delete %s: offset: %x\n",
749 fdt_get_name(blob
, off
, 0), off
);
750 ret
= fdt_del_node((void *)blob
, off
);
752 printf("Can't delete node: %s\n",
764 int fdt_del_partitions(void *blob
, int parent_offset
)
771 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
772 if (off
> 0 && ndepth
== 1) {
773 prop
= fdt_getprop(blob
, off
, "label", NULL
);
776 * Could not find label property, nand {}; node?
777 * Check subnode, delete partitions there if any.
779 return fdt_del_partitions(blob
, off
);
781 ret
= fdt_del_subnodes(blob
, parent_offset
);
783 printf("Can't remove subnodes: %s\n",
792 int fdt_node_set_part_info(void *blob
, int parent_offset
,
793 struct mtd_device
*dev
)
795 struct list_head
*pentry
;
796 struct part_info
*part
;
797 struct reg_cell cell
;
802 ret
= fdt_del_partitions(blob
, parent_offset
);
807 * Check if it is nand {}; subnode, adjust
808 * the offset in this case
810 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
811 if (off
> 0 && ndepth
== 1)
815 list_for_each_prev(pentry
, &dev
->parts
) {
818 part
= list_entry(pentry
, struct part_info
, link
);
820 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
821 part_num
, part
->name
, part
->size
,
822 part
->offset
, part
->mask_flags
);
824 sprintf(buf
, "partition@%llx", part
->offset
);
826 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
827 if (ret
== -FDT_ERR_NOSPACE
) {
828 ret
= fdt_increase_size(blob
, 512);
833 } else if (ret
< 0) {
834 printf("Can't add partition node: %s\n",
840 /* Check MTD_WRITEABLE_CMD flag */
841 if (part
->mask_flags
& 1) {
843 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
844 if (ret
== -FDT_ERR_NOSPACE
) {
845 ret
= fdt_increase_size(blob
, 512);
854 cell
.r0
= cpu_to_fdt32(part
->offset
);
855 cell
.r1
= cpu_to_fdt32(part
->size
);
857 ret
= fdt_setprop(blob
, newoff
, "reg", &cell
, sizeof(cell
));
858 if (ret
== -FDT_ERR_NOSPACE
) {
859 ret
= fdt_increase_size(blob
, 512);
868 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
869 if (ret
== -FDT_ERR_NOSPACE
) {
870 ret
= fdt_increase_size(blob
, 512);
882 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
885 printf("Can't add property: %s\n", fdt_strerror(ret
));
890 * Update partitions in nor/nand nodes using info from
891 * mtdparts environment variable. The nodes to update are
892 * specified by node_info structure which contains mtd device
893 * type and compatible string: E. g. the board code in
894 * ft_board_setup() could use:
896 * struct node_info nodes[] = {
897 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
898 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
901 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
903 void fdt_fixup_mtdparts(void *blob
, void *node_info
, int node_info_size
)
905 struct node_info
*ni
= node_info
;
906 struct mtd_device
*dev
;
911 parts
= getenv("mtdparts");
915 if (mtdparts_init() != 0)
918 for (i
= 0; i
< node_info_size
; i
++) {
920 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
921 while (noff
!= -FDT_ERR_NOTFOUND
) {
922 debug("%s: %s, mtd dev type %d\n",
923 fdt_get_name(blob
, noff
, 0),
924 ni
[i
].compat
, ni
[i
].type
);
925 dev
= device_find(ni
[i
].type
, idx
++);
927 if (fdt_node_set_part_info(blob
, noff
, dev
))
928 return; /* return on error */
931 /* Jump to next flash node */
932 noff
= fdt_node_offset_by_compatible(blob
, noff
,
939 void fdt_del_node_and_alias(void *blob
, const char *alias
)
941 int off
= fdt_path_offset(blob
, alias
);
946 fdt_del_node(blob
, off
);
948 off
= fdt_path_offset(blob
, "/aliases");
949 fdt_delprop(blob
, off
, alias
);
952 /* Max address size we deal with */
953 #define OF_MAX_ADDR_CELLS 4
954 #define OF_BAD_ADDR FDT_ADDR_T_NONE
955 #define OF_CHECK_COUNTS(na) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS)
959 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
963 printf(" %08x", *(addr
++));
967 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
970 /* Callbacks for bus specific translators */
973 const char *addresses
;
974 void (*count_cells
)(void *blob
, int parentoffset
,
975 int *addrc
, int *sizec
);
976 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
977 int na
, int ns
, int pna
);
978 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
981 /* Default translator (generic bus) */
982 void of_bus_default_count_cells(void *blob
, int parentoffset
,
983 int *addrc
, int *sizec
)
988 *addrc
= fdt_address_cells(blob
, parentoffset
);
991 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
993 *sizec
= be32_to_cpup(prop
);
999 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
1000 int na
, int ns
, int pna
)
1004 cp
= of_read_number(range
, na
);
1005 s
= of_read_number(range
+ na
+ pna
, ns
);
1006 da
= of_read_number(addr
, na
);
1008 debug("OF: default map, cp=%" PRIu64
", s=%" PRIu64
1009 ", da=%" PRIu64
"\n", cp
, s
, da
);
1011 if (da
< cp
|| da
>= (cp
+ s
))
1016 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
1018 u64 a
= of_read_number(addr
, na
);
1019 memset(addr
, 0, na
* 4);
1022 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
1023 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
1028 /* Array of bus specific translators */
1029 static struct of_bus of_busses
[] = {
1034 .count_cells
= of_bus_default_count_cells
,
1035 .map
= of_bus_default_map
,
1036 .translate
= of_bus_default_translate
,
1040 static int of_translate_one(void * blob
, int parent
, struct of_bus
*bus
,
1041 struct of_bus
*pbus
, fdt32_t
*addr
,
1042 int na
, int ns
, int pna
, const char *rprop
)
1044 const fdt32_t
*ranges
;
1047 u64 offset
= OF_BAD_ADDR
;
1049 /* Normally, an absence of a "ranges" property means we are
1050 * crossing a non-translatable boundary, and thus the addresses
1051 * below the current not cannot be converted to CPU physical ones.
1052 * Unfortunately, while this is very clear in the spec, it's not
1053 * what Apple understood, and they do have things like /uni-n or
1054 * /ht nodes with no "ranges" property and a lot of perfectly
1055 * useable mapped devices below them. Thus we treat the absence of
1056 * "ranges" as equivalent to an empty "ranges" property which means
1057 * a 1:1 translation at that level. It's up to the caller not to try
1058 * to translate addresses that aren't supposed to be translated in
1059 * the first place. --BenH.
1061 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1062 if (ranges
== NULL
|| rlen
== 0) {
1063 offset
= of_read_number(addr
, na
);
1064 memset(addr
, 0, pna
* 4);
1065 debug("OF: no ranges, 1:1 translation\n");
1069 debug("OF: walking ranges...\n");
1071 /* Now walk through the ranges */
1073 rone
= na
+ pna
+ ns
;
1074 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1075 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1076 if (offset
!= OF_BAD_ADDR
)
1079 if (offset
== OF_BAD_ADDR
) {
1080 debug("OF: not found !\n");
1083 memcpy(addr
, ranges
+ na
, 4 * pna
);
1086 of_dump_addr("OF: parent translation for:", addr
, pna
);
1087 debug("OF: with offset: %" PRIu64
"\n", offset
);
1089 /* Translate it into parent bus space */
1090 return pbus
->translate(addr
, offset
, pna
);
1094 * Translate an address from the device-tree into a CPU physical address,
1095 * this walks up the tree and applies the various bus mappings on the
1098 * Note: We consider that crossing any level with #size-cells == 0 to mean
1099 * that translation is impossible (that is we are not dealing with a value
1100 * that can be mapped to a cpu physical address). This is not really specified
1101 * that way, but this is traditionally the way IBM at least do things
1103 static u64
__of_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
,
1107 struct of_bus
*bus
, *pbus
;
1108 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1109 int na
, ns
, pna
, pns
;
1110 u64 result
= OF_BAD_ADDR
;
1112 debug("OF: ** translation for device %s **\n",
1113 fdt_get_name(blob
, node_offset
, NULL
));
1115 /* Get parent & match bus type */
1116 parent
= fdt_parent_offset(blob
, node_offset
);
1119 bus
= &of_busses
[0];
1121 /* Cound address cells & copy address locally */
1122 bus
->count_cells(blob
, parent
, &na
, &ns
);
1123 if (!OF_CHECK_COUNTS(na
)) {
1124 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1125 fdt_get_name(blob
, node_offset
, NULL
));
1128 memcpy(addr
, in_addr
, na
* 4);
1130 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1131 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1132 of_dump_addr("OF: translating address:", addr
, na
);
1136 /* Switch to parent bus */
1137 node_offset
= parent
;
1138 parent
= fdt_parent_offset(blob
, node_offset
);
1140 /* If root, we have finished */
1142 debug("OF: reached root node\n");
1143 result
= of_read_number(addr
, na
);
1147 /* Get new parent bus and counts */
1148 pbus
= &of_busses
[0];
1149 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1150 if (!OF_CHECK_COUNTS(pna
)) {
1151 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1152 fdt_get_name(blob
, node_offset
, NULL
));
1156 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1157 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1159 /* Apply bus translation */
1160 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1161 addr
, na
, ns
, pna
, rprop
))
1164 /* Complete the move up one level */
1169 of_dump_addr("OF: one level translation:", addr
, na
);
1176 u64
fdt_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
)
1178 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1182 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1183 * who's reg property matches a physical cpu address
1185 * @blob: ptr to device tree
1186 * @compat: compatiable string to match
1187 * @compat_off: property name
1190 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1191 phys_addr_t compat_off
)
1193 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1194 while (off
!= -FDT_ERR_NOTFOUND
) {
1195 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1197 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1200 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1203 return -FDT_ERR_NOTFOUND
;
1207 * fdt_alloc_phandle: Return next free phandle value
1209 * @blob: ptr to device tree
1211 int fdt_alloc_phandle(void *blob
)
1214 uint32_t phandle
= 0;
1216 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1217 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1218 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1225 * fdt_set_phandle: Create a phandle property for the given node
1227 * @fdt: ptr to device tree
1228 * @nodeoffset: node to update
1229 * @phandle: phandle value to set (must be unique)
1231 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1236 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1238 if ((off
>= 0) && (off
!= nodeoffset
)) {
1241 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1242 printf("Trying to update node %s with phandle %u ",
1245 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1246 printf("that already exists in node %s.\n", buf
);
1247 return -FDT_ERR_BADPHANDLE
;
1251 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1256 * For now, also set the deprecated "linux,phandle" property, so that we
1257 * don't break older kernels.
1259 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1265 * fdt_create_phandle: Create a phandle property for the given node
1267 * @fdt: ptr to device tree
1268 * @nodeoffset: node to update
1270 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1272 /* see if there is a phandle already */
1273 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1275 /* if we got 0, means no phandle so create one */
1279 phandle
= fdt_alloc_phandle(fdt
);
1280 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1282 printf("Can't set phandle %u: %s\n", phandle
,
1292 * fdt_set_node_status: Set status for the given node
1294 * @fdt: ptr to device tree
1295 * @nodeoffset: node to update
1296 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1297 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1298 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1300 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1301 enum fdt_status status
, unsigned int error_code
)
1310 case FDT_STATUS_OKAY
:
1311 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1313 case FDT_STATUS_DISABLED
:
1314 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1316 case FDT_STATUS_FAIL
:
1317 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1319 case FDT_STATUS_FAIL_ERROR_CODE
:
1320 sprintf(buf
, "fail-%d", error_code
);
1321 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1324 printf("Invalid fdt status: %x\n", status
);
1333 * fdt_set_status_by_alias: Set status for the given node given an alias
1335 * @fdt: ptr to device tree
1336 * @alias: alias of node to update
1337 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1338 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1339 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1341 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1342 enum fdt_status status
, unsigned int error_code
)
1344 int offset
= fdt_path_offset(fdt
, alias
);
1346 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1349 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1350 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1355 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1356 if (noff
!= -FDT_ERR_NOTFOUND
) {
1357 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1359 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1360 if (ret
== -FDT_ERR_NOSPACE
) {
1361 ret
= fdt_increase_size(blob
, 512);
1366 } else if (ret
< 0) {
1367 printf("Can't add property: %s\n", fdt_strerror(ret
));
1373 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1379 * Verify the physical address of device tree node for a given alias
1381 * This function locates the device tree node of a given alias, and then
1382 * verifies that the physical address of that device matches the given
1383 * parameter. It displays a message if there is a mismatch.
1385 * Returns 1 on success, 0 on failure
1387 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1394 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1396 /* If there's no such alias, then it's not a failure */
1400 node
= fdt_path_offset(fdt
, path
);
1402 printf("Warning: device tree alias '%s' points to invalid "
1403 "node %s.\n", alias
, path
);
1407 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1409 printf("Warning: device tree node '%s' has no address.\n",
1414 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1415 if (addr
!= dt_addr
) {
1416 printf("Warning: U-Boot configured device %s at address %"
1417 PRIx64
",\n but the device tree has it address %"
1418 PRIx64
".\n", alias
, addr
, dt_addr
);
1426 * Returns the base address of an SOC or PCI node
1428 u64
fdt_get_base_address(void *fdt
, int node
)
1432 const fdt32_t
*prop
;
1434 naddr
= fdt_address_cells(fdt
, node
);
1436 prop
= fdt_getprop(fdt
, node
, "ranges", &size
);
1438 return prop
? fdt_translate_address(fdt
, node
, prop
+ naddr
) : 0;
1442 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1444 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1445 uint64_t *val
, int cells
)
1447 const fdt32_t
*prop32
= &prop
[cell_off
];
1448 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1450 if ((cell_off
+ cells
) > prop_len
)
1451 return -FDT_ERR_NOSPACE
;
1455 *val
= fdt32_to_cpu(*prop32
);
1458 *val
= fdt64_to_cpu(*prop64
);
1461 return -FDT_ERR_NOSPACE
;
1468 * fdt_read_range - Read a node's n'th range property
1470 * @fdt: ptr to device tree
1471 * @node: offset of node
1473 * @child_addr: pointer to storage for the "child address" field
1474 * @addr: pointer to storage for the CPU view translated physical start
1475 * @len: pointer to storage for the range length
1477 * Convenience function that reads and interprets a specific range out of
1478 * a number of the "ranges" property array.
1480 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1481 uint64_t *addr
, uint64_t *len
)
1483 int pnode
= fdt_parent_offset(fdt
, node
);
1484 const fdt32_t
*ranges
;
1493 * The "ranges" property is an array of
1494 * { <child address> <parent address> <size in child address space> }
1496 * All 3 elements can span a diffent number of cells. Fetch their size.
1498 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1499 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1500 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1502 /* Now try to get the ranges property */
1503 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1505 return -FDT_ERR_NOTFOUND
;
1506 ranges_len
/= sizeof(uint32_t);
1508 /* Jump to the n'th entry */
1509 cell
= n
* (pacells
+ acells
+ scells
);
1511 /* Read <child address> */
1513 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1520 /* Read <parent address> */
1522 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1525 /* Read <size in child address space> */
1527 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);
1536 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1538 * @fdt: ptr to device tree
1539 * @node: offset of the simplefb node
1540 * @base_address: framebuffer base address
1541 * @width: width in pixels
1542 * @height: height in pixels
1543 * @stride: bytes per line
1544 * @format: pixel format string
1546 * Convenience function to fill and enable a simplefb node.
1548 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
1549 u32 height
, u32 stride
, const char *format
)
1553 int i
, addrc
, sizec
, ret
;
1555 of_bus_default_count_cells(fdt
, fdt_parent_offset(fdt
, node
),
1559 cells
[i
++] = cpu_to_fdt32(base_address
>> 32);
1560 cells
[i
++] = cpu_to_fdt32(base_address
);
1563 cells
[i
++] = cpu_to_fdt32(height
* stride
);
1565 ret
= fdt_setprop(fdt
, node
, "reg", cells
, sizeof(cells
[0]) * i
);
1569 snprintf(name
, sizeof(name
), "framebuffer@%" PRIx64
, base_address
);
1570 ret
= fdt_set_name(fdt
, node
, name
);
1574 ret
= fdt_setprop_u32(fdt
, node
, "width", width
);
1578 ret
= fdt_setprop_u32(fdt
, node
, "height", height
);
1582 ret
= fdt_setprop_u32(fdt
, node
, "stride", stride
);
1586 ret
= fdt_setprop_string(fdt
, node
, "format", format
);
1590 ret
= fdt_setprop_string(fdt
, node
, "status", "okay");
1598 * Update native-mode in display-timings from display environment variable.
1599 * The node to update are specified by path.
1601 int fdt_fixup_display(void *blob
, const char *path
, const char *display
)
1605 if (!display
|| !path
)
1606 return -FDT_ERR_NOTFOUND
;
1608 toff
= fdt_path_offset(blob
, path
);
1610 toff
= fdt_subnode_offset(blob
, toff
, "display-timings");
1614 for (off
= fdt_first_subnode(blob
, toff
);
1616 off
= fdt_next_subnode(blob
, off
)) {
1617 uint32_t h
= fdt_get_phandle(blob
, off
);
1618 debug("%s:0x%x\n", fdt_get_name(blob
, off
, NULL
),
1620 if (strcasecmp(fdt_get_name(blob
, off
, NULL
), display
) == 0)
1621 return fdt_setprop_u32(blob
, toff
, "native-mode", h
);