3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <stdio_dev.h>
13 #include <linux/ctype.h>
14 #include <linux/types.h>
15 #include <asm/global_data.h>
17 #include <fdt_support.h>
22 * fdt_getprop_u32_default_node - Return a node's property or a default
24 * @fdt: ptr to device tree
25 * @off: offset of node
26 * @cell: cell offset in property
27 * @prop: property name
28 * @dflt: default value if the property isn't found
30 * Convenience function to return a node's property or a default value if
31 * the property doesn't exist.
33 u32
fdt_getprop_u32_default_node(const void *fdt
, int off
, int cell
,
34 const char *prop
, const u32 dflt
)
39 val
= fdt_getprop(fdt
, off
, prop
, &len
);
41 /* Check if property exists */
45 /* Check if property is long enough */
46 if (len
< ((cell
+ 1) * sizeof(uint32_t)))
49 return fdt32_to_cpu(*val
);
53 * fdt_getprop_u32_default - Find a node and return it's property or a default
55 * @fdt: ptr to device tree
57 * @prop: property name
58 * @dflt: default value if the property isn't found
60 * Convenience function to find a node and return it's property or a
61 * default value if it doesn't exist.
63 u32
fdt_getprop_u32_default(const void *fdt
, const char *path
,
64 const char *prop
, const u32 dflt
)
68 off
= fdt_path_offset(fdt
, path
);
72 return fdt_getprop_u32_default_node(fdt
, off
, 0, prop
, dflt
);
76 * fdt_find_and_setprop: Find a node and set it's property
78 * @fdt: ptr to device tree
80 * @prop: property name
81 * @val: ptr to new value
82 * @len: length of new property value
83 * @create: flag to create the property if it doesn't exist
85 * Convenience function to directly set a property given the path to the node.
87 int fdt_find_and_setprop(void *fdt
, const char *node
, const char *prop
,
88 const void *val
, int len
, int create
)
90 int nodeoff
= fdt_path_offset(fdt
, node
);
95 if ((!create
) && (fdt_get_property(fdt
, nodeoff
, prop
, NULL
) == NULL
))
96 return 0; /* create flag not set; so exit quietly */
98 return fdt_setprop(fdt
, nodeoff
, prop
, val
, len
);
102 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
104 * @fdt: pointer to the device tree blob
105 * @parentoffset: structure block offset of a node
106 * @name: name of the subnode to locate
108 * fdt_subnode_offset() finds a subnode of the node with a given name.
109 * If the subnode does not exist, it will be created.
111 int fdt_find_or_add_subnode(void *fdt
, int parentoffset
, const char *name
)
115 offset
= fdt_subnode_offset(fdt
, parentoffset
, name
);
117 if (offset
== -FDT_ERR_NOTFOUND
)
118 offset
= fdt_add_subnode(fdt
, parentoffset
, name
);
121 printf("%s: %s: %s\n", __func__
, name
, fdt_strerror(offset
));
126 /* rename to CONFIG_OF_STDOUT_PATH ? */
127 #if defined(OF_STDOUT_PATH)
128 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
130 return fdt_setprop(fdt
, chosenoff
, "linux,stdout-path",
131 OF_STDOUT_PATH
, strlen(OF_STDOUT_PATH
) + 1);
133 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
134 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
138 char sername
[9] = { 0 };
141 char tmp
[256]; /* long enough */
143 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
145 aliasoff
= fdt_path_offset(fdt
, "/aliases");
151 path
= fdt_getprop(fdt
, aliasoff
, sername
, &len
);
157 /* fdt_setprop may break "path" so we copy it to tmp buffer */
158 memcpy(tmp
, path
, len
);
160 err
= fdt_setprop(fdt
, chosenoff
, "linux,stdout-path", tmp
, len
);
162 printf("WARNING: could not set linux,stdout-path %s.\n",
168 printf("WARNING: %s: could not read %s alias: %s\n",
169 __func__
, sername
, fdt_strerror(err
));
174 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
180 static inline int fdt_setprop_uxx(void *fdt
, int nodeoffset
, const char *name
,
181 uint64_t val
, int is_u64
)
184 return fdt_setprop_u64(fdt
, nodeoffset
, name
, val
);
186 return fdt_setprop_u32(fdt
, nodeoffset
, name
, (uint32_t)val
);
189 int fdt_root(void *fdt
)
194 err
= fdt_check_header(fdt
);
196 printf("fdt_root: %s\n", fdt_strerror(err
));
200 serial
= getenv("serial#");
202 err
= fdt_setprop(fdt
, 0, "serial-number", serial
,
206 printf("WARNING: could not set serial-number %s.\n",
215 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
)
222 /* just return if the size of initrd is zero */
223 if (initrd_start
== initrd_end
)
226 /* find or create "/chosen" node. */
227 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
231 total
= fdt_num_mem_rsv(fdt
);
234 * Look for an existing entry and update it. If we don't find
235 * the entry, we will j be the next available slot.
237 for (j
= 0; j
< total
; j
++) {
238 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
239 if (addr
== initrd_start
) {
240 fdt_del_mem_rsv(fdt
, j
);
245 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
247 printf("fdt_initrd: %s\n", fdt_strerror(err
));
251 is_u64
= (fdt_address_cells(fdt
, 0) == 2);
253 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-start",
254 (uint64_t)initrd_start
, is_u64
);
257 printf("WARNING: could not set linux,initrd-start %s.\n",
262 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-end",
263 (uint64_t)initrd_end
, is_u64
);
266 printf("WARNING: could not set linux,initrd-end %s.\n",
275 int fdt_chosen(void *fdt
)
279 char *str
; /* used to set string properties */
281 err
= fdt_check_header(fdt
);
283 printf("fdt_chosen: %s\n", fdt_strerror(err
));
287 /* find or create "/chosen" node. */
288 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
292 str
= getenv("bootargs");
294 err
= fdt_setprop(fdt
, nodeoffset
, "bootargs", str
,
297 printf("WARNING: could not set bootargs %s.\n",
303 return fdt_fixup_stdout(fdt
, nodeoffset
);
306 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
307 const void *val
, int len
, int create
)
311 debug("Updating property '%s/%s' = ", path
, prop
);
312 for (i
= 0; i
< len
; i
++)
313 debug(" %.2x", *(u8
*)(val
+i
));
316 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
318 printf("Unable to update property %s:%s, err=%s\n",
319 path
, prop
, fdt_strerror(rc
));
322 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
325 fdt32_t tmp
= cpu_to_fdt32(val
);
326 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
329 void do_fixup_by_prop(void *fdt
,
330 const char *pname
, const void *pval
, int plen
,
331 const char *prop
, const void *val
, int len
,
337 debug("Updating property '%s' = ", prop
);
338 for (i
= 0; i
< len
; i
++)
339 debug(" %.2x", *(u8
*)(val
+i
));
342 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
343 while (off
!= -FDT_ERR_NOTFOUND
) {
344 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
345 fdt_setprop(fdt
, off
, prop
, val
, len
);
346 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
350 void do_fixup_by_prop_u32(void *fdt
,
351 const char *pname
, const void *pval
, int plen
,
352 const char *prop
, u32 val
, int create
)
354 fdt32_t tmp
= cpu_to_fdt32(val
);
355 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
358 void do_fixup_by_compat(void *fdt
, const char *compat
,
359 const char *prop
, const void *val
, int len
, int create
)
364 debug("Updating property '%s' = ", prop
);
365 for (i
= 0; i
< len
; i
++)
366 debug(" %.2x", *(u8
*)(val
+i
));
369 off
= fdt_node_offset_by_compatible(fdt
, -1, compat
);
370 while (off
!= -FDT_ERR_NOTFOUND
) {
371 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
372 fdt_setprop(fdt
, off
, prop
, val
, len
);
373 off
= fdt_node_offset_by_compatible(fdt
, off
, compat
);
377 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
378 const char *prop
, u32 val
, int create
)
380 fdt32_t tmp
= cpu_to_fdt32(val
);
381 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
385 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
387 static int fdt_pack_reg(const void *fdt
, void *buf
, u64
*address
, u64
*size
,
391 int address_cells
= fdt_address_cells(fdt
, 0);
392 int size_cells
= fdt_size_cells(fdt
, 0);
395 for (i
= 0; i
< n
; i
++) {
396 if (address_cells
== 2)
397 *(fdt64_t
*)p
= cpu_to_fdt64(address
[i
]);
399 *(fdt32_t
*)p
= cpu_to_fdt32(address
[i
]);
400 p
+= 4 * address_cells
;
403 *(fdt64_t
*)p
= cpu_to_fdt64(size
[i
]);
405 *(fdt32_t
*)p
= cpu_to_fdt32(size
[i
]);
409 return p
- (char *)buf
;
412 #ifdef CONFIG_NR_DRAM_BANKS
413 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
415 #define MEMORY_BANKS_MAX 4
417 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
421 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
423 if (banks
> MEMORY_BANKS_MAX
) {
424 printf("%s: num banks %d exceeds hardcoded limit %d."
425 " Recompile with higher MEMORY_BANKS_MAX?\n",
426 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
430 err
= fdt_check_header(blob
);
432 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
436 /* find or create "/memory" node. */
437 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
441 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
444 printf("WARNING: could not set %s %s.\n", "device_type",
452 len
= fdt_pack_reg(blob
, tmp
, start
, size
, banks
);
454 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
456 printf("WARNING: could not set %s %s.\n",
457 "reg", fdt_strerror(err
));
463 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
465 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
468 void fdt_fixup_ethernet(void *fdt
)
474 unsigned char mac_addr
[6];
477 if (fdt_path_offset(fdt
, "/aliases") < 0)
480 /* Cycle through all aliases */
481 for (prop
= 0; ; prop
++) {
483 int len
= strlen("ethernet");
485 /* FDT might have been edited, recompute the offset */
486 offset
= fdt_first_property_offset(fdt
,
487 fdt_path_offset(fdt
, "/aliases"));
488 /* Select property number 'prop' */
489 for (i
= 0; i
< prop
; i
++)
490 offset
= fdt_next_property_offset(fdt
, offset
);
495 path
= fdt_getprop_by_offset(fdt
, offset
, &name
, NULL
);
496 if (!strncmp(name
, "ethernet", len
)) {
497 i
= trailing_strtol(name
);
500 strcpy(mac
, "ethaddr");
502 sprintf(mac
, "eth%daddr", i
);
510 for (j
= 0; j
< 6; j
++) {
512 simple_strtoul(tmp
, &end
, 16) : 0;
514 tmp
= (*end
) ? end
+ 1 : end
;
517 do_fixup_by_path(fdt
, path
, "mac-address",
519 do_fixup_by_path(fdt
, path
, "local-mac-address",
525 /* Resize the fdt to its actual size + a bit of padding */
526 int fdt_shrink_to_minimum(void *blob
)
536 total
= fdt_num_mem_rsv(blob
);
537 for (i
= 0; i
< total
; i
++) {
538 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
539 if (addr
== (uintptr_t)blob
) {
540 fdt_del_mem_rsv(blob
, i
);
546 * Calculate the actual size of the fdt
547 * plus the size needed for 5 fdt_add_mem_rsv, one
548 * for the fdt itself and 4 for a possible initrd
549 * ((initrd-start + initrd-end) * 2 (name & value))
551 actualsize
= fdt_off_dt_strings(blob
) +
552 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
554 /* Make it so the fdt ends on a page boundary */
555 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
556 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
558 /* Change the fdt header to reflect the correct size */
559 fdt_set_totalsize(blob
, actualsize
);
561 /* Add the new reservation */
562 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
570 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
572 #define FDT_PCI_PREFETCH (0x40000000)
573 #define FDT_PCI_MEM32 (0x02000000)
574 #define FDT_PCI_IO (0x01000000)
575 #define FDT_PCI_MEM64 (0x03000000)
577 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
579 int addrcell
, sizecell
, len
, r
;
581 /* sized based on pci addr cells, size-cells, & address-cells */
582 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
584 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
585 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
587 dma_range
= &dma_ranges
[0];
588 for (r
= 0; r
< hose
->region_count
; r
++) {
589 u64 bus_start
, phys_start
, size
;
591 /* skip if !PCI_REGION_SYS_MEMORY */
592 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
595 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
596 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
597 size
= (u64
)hose
->regions
[r
].size
;
600 if (size
>= 0x100000000ull
)
601 dma_range
[0] |= FDT_PCI_MEM64
;
603 dma_range
[0] |= FDT_PCI_MEM32
;
604 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
605 dma_range
[0] |= FDT_PCI_PREFETCH
;
606 #ifdef CONFIG_SYS_PCI_64BIT
607 dma_range
[1] = bus_start
>> 32;
611 dma_range
[2] = bus_start
& 0xffffffff;
614 dma_range
[3] = phys_start
>> 32;
615 dma_range
[4] = phys_start
& 0xffffffff;
617 dma_range
[3] = phys_start
& 0xffffffff;
621 dma_range
[3 + addrcell
+ 0] = size
>> 32;
622 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
624 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
627 dma_range
+= (3 + addrcell
+ sizecell
);
630 len
= dma_range
- &dma_ranges
[0];
632 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
638 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
640 * Provide a weak default function to return the flash bank size.
641 * There might be multiple non-identical flash chips connected to one
642 * chip-select, so we need to pass an index as well.
644 u32
__flash_get_bank_size(int cs
, int idx
)
646 extern flash_info_t flash_info
[];
649 * As default, a simple 1:1 mapping is provided. Boards with
650 * a different mapping need to supply a board specific mapping
653 return flash_info
[cs
].size
;
655 u32
flash_get_bank_size(int cs
, int idx
)
656 __attribute__((weak
, alias("__flash_get_bank_size")));
659 * This function can be used to update the size in the "reg" property
660 * of all NOR FLASH device nodes. This is necessary for boards with
661 * non-fixed NOR FLASH sizes.
663 int fdt_fixup_nor_flash_size(void *blob
)
665 char compat
[][16] = { "cfi-flash", "jedec-flash" };
668 struct fdt_property
*prop
;
672 for (i
= 0; i
< 2; i
++) {
673 off
= fdt_node_offset_by_compatible(blob
, -1, compat
[i
]);
674 while (off
!= -FDT_ERR_NOTFOUND
) {
678 * Found one compatible node, so fixup the size
679 * int its reg properties
681 prop
= fdt_get_property_w(blob
, off
, "reg", &len
);
683 int tuple_size
= 3 * sizeof(reg
);
686 * There might be multiple reg-tuples,
687 * so loop through them all
689 reg
= reg2
= (u32
*)&prop
->data
[0];
690 for (idx
= 0; idx
< (len
/ tuple_size
); idx
++) {
692 * Update size in reg property
694 reg
[2] = flash_get_bank_size(reg
[0],
698 * Point to next reg tuple
703 fdt_setprop(blob
, off
, "reg", reg2
, len
);
706 /* Move to next compatible node */
707 off
= fdt_node_offset_by_compatible(blob
, off
,
716 int fdt_increase_size(void *fdt
, int add_len
)
720 newlen
= fdt_totalsize(fdt
) + add_len
;
722 /* Open in place with a new len */
723 return fdt_open_into(fdt
, fdt
, newlen
);
726 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
727 #include <jffs2/load_kernel.h>
728 #include <mtd_node.h>
735 int fdt_del_subnodes(const void *blob
, int parent_offset
)
740 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
741 (off
>= 0) && (ndepth
> 0);
742 off
= fdt_next_node(blob
, off
, &ndepth
)) {
744 debug("delete %s: offset: %x\n",
745 fdt_get_name(blob
, off
, 0), off
);
746 ret
= fdt_del_node((void *)blob
, off
);
748 printf("Can't delete node: %s\n",
760 int fdt_del_partitions(void *blob
, int parent_offset
)
767 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
768 if (off
> 0 && ndepth
== 1) {
769 prop
= fdt_getprop(blob
, off
, "label", NULL
);
772 * Could not find label property, nand {}; node?
773 * Check subnode, delete partitions there if any.
775 return fdt_del_partitions(blob
, off
);
777 ret
= fdt_del_subnodes(blob
, parent_offset
);
779 printf("Can't remove subnodes: %s\n",
788 int fdt_node_set_part_info(void *blob
, int parent_offset
,
789 struct mtd_device
*dev
)
791 struct list_head
*pentry
;
792 struct part_info
*part
;
793 struct reg_cell cell
;
798 ret
= fdt_del_partitions(blob
, parent_offset
);
803 * Check if it is nand {}; subnode, adjust
804 * the offset in this case
806 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
807 if (off
> 0 && ndepth
== 1)
811 list_for_each_prev(pentry
, &dev
->parts
) {
814 part
= list_entry(pentry
, struct part_info
, link
);
816 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
817 part_num
, part
->name
, part
->size
,
818 part
->offset
, part
->mask_flags
);
820 sprintf(buf
, "partition@%llx", part
->offset
);
822 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
823 if (ret
== -FDT_ERR_NOSPACE
) {
824 ret
= fdt_increase_size(blob
, 512);
829 } else if (ret
< 0) {
830 printf("Can't add partition node: %s\n",
836 /* Check MTD_WRITEABLE_CMD flag */
837 if (part
->mask_flags
& 1) {
839 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
840 if (ret
== -FDT_ERR_NOSPACE
) {
841 ret
= fdt_increase_size(blob
, 512);
850 cell
.r0
= cpu_to_fdt32(part
->offset
);
851 cell
.r1
= cpu_to_fdt32(part
->size
);
853 ret
= fdt_setprop(blob
, newoff
, "reg", &cell
, sizeof(cell
));
854 if (ret
== -FDT_ERR_NOSPACE
) {
855 ret
= fdt_increase_size(blob
, 512);
864 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
865 if (ret
== -FDT_ERR_NOSPACE
) {
866 ret
= fdt_increase_size(blob
, 512);
878 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
881 printf("Can't add property: %s\n", fdt_strerror(ret
));
886 * Update partitions in nor/nand nodes using info from
887 * mtdparts environment variable. The nodes to update are
888 * specified by node_info structure which contains mtd device
889 * type and compatible string: E. g. the board code in
890 * ft_board_setup() could use:
892 * struct node_info nodes[] = {
893 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
894 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
897 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
899 void fdt_fixup_mtdparts(void *blob
, void *node_info
, int node_info_size
)
901 struct node_info
*ni
= node_info
;
902 struct mtd_device
*dev
;
907 parts
= getenv("mtdparts");
911 if (mtdparts_init() != 0)
914 for (i
= 0; i
< node_info_size
; i
++) {
916 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
917 while (noff
!= -FDT_ERR_NOTFOUND
) {
918 debug("%s: %s, mtd dev type %d\n",
919 fdt_get_name(blob
, noff
, 0),
920 ni
[i
].compat
, ni
[i
].type
);
921 dev
= device_find(ni
[i
].type
, idx
++);
923 if (fdt_node_set_part_info(blob
, noff
, dev
))
924 return; /* return on error */
927 /* Jump to next flash node */
928 noff
= fdt_node_offset_by_compatible(blob
, noff
,
935 void fdt_del_node_and_alias(void *blob
, const char *alias
)
937 int off
= fdt_path_offset(blob
, alias
);
942 fdt_del_node(blob
, off
);
944 off
= fdt_path_offset(blob
, "/aliases");
945 fdt_delprop(blob
, off
, alias
);
948 /* Max address size we deal with */
949 #define OF_MAX_ADDR_CELLS 4
950 #define OF_BAD_ADDR FDT_ADDR_T_NONE
951 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
956 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
960 printf(" %08x", *(addr
++));
964 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
968 * struct of_bus - Callbacks for bus specific translators
969 * @name: A string used to identify this bus in debug output.
970 * @addresses: The name of the DT property from which addresses are
971 * to be read, typically "reg".
972 * @match: Return non-zero if the node whose parent is at
973 * parentoffset in the FDT blob corresponds to a bus
974 * of this type, otherwise return zero. If NULL a match
976 * @count_cells:Count how many cells (be32 values) a node whose parent
977 * is at parentoffset in the FDT blob will require to
978 * represent its address (written to *addrc) & size
979 * (written to *sizec).
980 * @map: Map the address addr from the address space of this
981 * bus to that of its parent, making use of the ranges
982 * read from DT to an array at range. na and ns are the
983 * number of cells (be32 values) used to hold and address
984 * or size, respectively, for this bus. pna is the number
985 * of cells used to hold an address for the parent bus.
986 * Returns the address in the address space of the parent
988 * @translate: Update the value of the address cells at addr within an
989 * FDT by adding offset to it. na specifies the number of
990 * cells used to hold the address being translated. Returns
991 * zero on success, non-zero on error.
993 * Each bus type will include a struct of_bus in the of_busses array,
994 * providing implementations of some or all of the functions used to
995 * match the bus & handle address translation for its children.
999 const char *addresses
;
1000 int (*match
)(void *blob
, int parentoffset
);
1001 void (*count_cells
)(void *blob
, int parentoffset
,
1002 int *addrc
, int *sizec
);
1003 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
1004 int na
, int ns
, int pna
);
1005 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
1008 /* Default translator (generic bus) */
1009 void of_bus_default_count_cells(void *blob
, int parentoffset
,
1010 int *addrc
, int *sizec
)
1012 const fdt32_t
*prop
;
1015 *addrc
= fdt_address_cells(blob
, parentoffset
);
1018 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
1020 *sizec
= be32_to_cpup(prop
);
1026 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
1027 int na
, int ns
, int pna
)
1031 cp
= of_read_number(range
, na
);
1032 s
= of_read_number(range
+ na
+ pna
, ns
);
1033 da
= of_read_number(addr
, na
);
1035 debug("OF: default map, cp=%" PRIu64
", s=%" PRIu64
1036 ", da=%" PRIu64
"\n", cp
, s
, da
);
1038 if (da
< cp
|| da
>= (cp
+ s
))
1043 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
1045 u64 a
= of_read_number(addr
, na
);
1046 memset(addr
, 0, na
* 4);
1049 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
1050 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
1055 #ifdef CONFIG_OF_ISA_BUS
1057 /* ISA bus translator */
1058 static int of_bus_isa_match(void *blob
, int parentoffset
)
1062 name
= fdt_get_name(blob
, parentoffset
, NULL
);
1066 return !strcmp(name
, "isa");
1069 static void of_bus_isa_count_cells(void *blob
, int parentoffset
,
1070 int *addrc
, int *sizec
)
1078 static u64
of_bus_isa_map(fdt32_t
*addr
, const fdt32_t
*range
,
1079 int na
, int ns
, int pna
)
1083 /* Check address type match */
1084 if ((addr
[0] ^ range
[0]) & cpu_to_be32(1))
1087 cp
= of_read_number(range
+ 1, na
- 1);
1088 s
= of_read_number(range
+ na
+ pna
, ns
);
1089 da
= of_read_number(addr
+ 1, na
- 1);
1091 debug("OF: ISA map, cp=%" PRIu64
", s=%" PRIu64
1092 ", da=%" PRIu64
"\n", cp
, s
, da
);
1094 if (da
< cp
|| da
>= (cp
+ s
))
1099 static int of_bus_isa_translate(fdt32_t
*addr
, u64 offset
, int na
)
1101 return of_bus_default_translate(addr
+ 1, offset
, na
- 1);
1104 #endif /* CONFIG_OF_ISA_BUS */
1106 /* Array of bus specific translators */
1107 static struct of_bus of_busses
[] = {
1108 #ifdef CONFIG_OF_ISA_BUS
1113 .match
= of_bus_isa_match
,
1114 .count_cells
= of_bus_isa_count_cells
,
1115 .map
= of_bus_isa_map
,
1116 .translate
= of_bus_isa_translate
,
1118 #endif /* CONFIG_OF_ISA_BUS */
1123 .count_cells
= of_bus_default_count_cells
,
1124 .map
= of_bus_default_map
,
1125 .translate
= of_bus_default_translate
,
1129 static struct of_bus
*of_match_bus(void *blob
, int parentoffset
)
1133 if (ARRAY_SIZE(of_busses
) == 1)
1136 for (bus
= of_busses
; bus
; bus
++) {
1137 if (!bus
->match
|| bus
->match(blob
, parentoffset
))
1142 * We should always have matched the default bus at least, since
1143 * it has a NULL match field. If we didn't then it somehow isn't
1144 * in the of_busses array or something equally catastrophic has
1151 static int of_translate_one(void * blob
, int parent
, struct of_bus
*bus
,
1152 struct of_bus
*pbus
, fdt32_t
*addr
,
1153 int na
, int ns
, int pna
, const char *rprop
)
1155 const fdt32_t
*ranges
;
1158 u64 offset
= OF_BAD_ADDR
;
1160 /* Normally, an absence of a "ranges" property means we are
1161 * crossing a non-translatable boundary, and thus the addresses
1162 * below the current not cannot be converted to CPU physical ones.
1163 * Unfortunately, while this is very clear in the spec, it's not
1164 * what Apple understood, and they do have things like /uni-n or
1165 * /ht nodes with no "ranges" property and a lot of perfectly
1166 * useable mapped devices below them. Thus we treat the absence of
1167 * "ranges" as equivalent to an empty "ranges" property which means
1168 * a 1:1 translation at that level. It's up to the caller not to try
1169 * to translate addresses that aren't supposed to be translated in
1170 * the first place. --BenH.
1172 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1173 if (ranges
== NULL
|| rlen
== 0) {
1174 offset
= of_read_number(addr
, na
);
1175 memset(addr
, 0, pna
* 4);
1176 debug("OF: no ranges, 1:1 translation\n");
1180 debug("OF: walking ranges...\n");
1182 /* Now walk through the ranges */
1184 rone
= na
+ pna
+ ns
;
1185 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1186 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1187 if (offset
!= OF_BAD_ADDR
)
1190 if (offset
== OF_BAD_ADDR
) {
1191 debug("OF: not found !\n");
1194 memcpy(addr
, ranges
+ na
, 4 * pna
);
1197 of_dump_addr("OF: parent translation for:", addr
, pna
);
1198 debug("OF: with offset: %" PRIu64
"\n", offset
);
1200 /* Translate it into parent bus space */
1201 return pbus
->translate(addr
, offset
, pna
);
1205 * Translate an address from the device-tree into a CPU physical address,
1206 * this walks up the tree and applies the various bus mappings on the
1209 * Note: We consider that crossing any level with #size-cells == 0 to mean
1210 * that translation is impossible (that is we are not dealing with a value
1211 * that can be mapped to a cpu physical address). This is not really specified
1212 * that way, but this is traditionally the way IBM at least do things
1214 static u64
__of_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
,
1218 struct of_bus
*bus
, *pbus
;
1219 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1220 int na
, ns
, pna
, pns
;
1221 u64 result
= OF_BAD_ADDR
;
1223 debug("OF: ** translation for device %s **\n",
1224 fdt_get_name(blob
, node_offset
, NULL
));
1226 /* Get parent & match bus type */
1227 parent
= fdt_parent_offset(blob
, node_offset
);
1230 bus
= of_match_bus(blob
, parent
);
1232 /* Cound address cells & copy address locally */
1233 bus
->count_cells(blob
, parent
, &na
, &ns
);
1234 if (!OF_CHECK_COUNTS(na
, ns
)) {
1235 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1236 fdt_get_name(blob
, node_offset
, NULL
));
1239 memcpy(addr
, in_addr
, na
* 4);
1241 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1242 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1243 of_dump_addr("OF: translating address:", addr
, na
);
1247 /* Switch to parent bus */
1248 node_offset
= parent
;
1249 parent
= fdt_parent_offset(blob
, node_offset
);
1251 /* If root, we have finished */
1253 debug("OF: reached root node\n");
1254 result
= of_read_number(addr
, na
);
1258 /* Get new parent bus and counts */
1259 pbus
= of_match_bus(blob
, parent
);
1260 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1261 if (!OF_CHECK_COUNTS(pna
, pns
)) {
1262 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1263 fdt_get_name(blob
, node_offset
, NULL
));
1267 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1268 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1270 /* Apply bus translation */
1271 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1272 addr
, na
, ns
, pna
, rprop
))
1275 /* Complete the move up one level */
1280 of_dump_addr("OF: one level translation:", addr
, na
);
1287 u64
fdt_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
)
1289 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1293 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1294 * who's reg property matches a physical cpu address
1296 * @blob: ptr to device tree
1297 * @compat: compatiable string to match
1298 * @compat_off: property name
1301 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1302 phys_addr_t compat_off
)
1304 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1305 while (off
!= -FDT_ERR_NOTFOUND
) {
1306 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1308 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1311 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1314 return -FDT_ERR_NOTFOUND
;
1318 * fdt_alloc_phandle: Return next free phandle value
1320 * @blob: ptr to device tree
1322 int fdt_alloc_phandle(void *blob
)
1325 uint32_t phandle
= 0;
1327 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1328 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1329 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1336 * fdt_set_phandle: Create a phandle property for the given node
1338 * @fdt: ptr to device tree
1339 * @nodeoffset: node to update
1340 * @phandle: phandle value to set (must be unique)
1342 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1347 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1349 if ((off
>= 0) && (off
!= nodeoffset
)) {
1352 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1353 printf("Trying to update node %s with phandle %u ",
1356 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1357 printf("that already exists in node %s.\n", buf
);
1358 return -FDT_ERR_BADPHANDLE
;
1362 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1367 * For now, also set the deprecated "linux,phandle" property, so that we
1368 * don't break older kernels.
1370 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1376 * fdt_create_phandle: Create a phandle property for the given node
1378 * @fdt: ptr to device tree
1379 * @nodeoffset: node to update
1381 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1383 /* see if there is a phandle already */
1384 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1386 /* if we got 0, means no phandle so create one */
1390 phandle
= fdt_alloc_phandle(fdt
);
1391 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1393 printf("Can't set phandle %u: %s\n", phandle
,
1403 * fdt_set_node_status: Set status for the given node
1405 * @fdt: ptr to device tree
1406 * @nodeoffset: node to update
1407 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1408 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1409 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1411 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1412 enum fdt_status status
, unsigned int error_code
)
1421 case FDT_STATUS_OKAY
:
1422 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1424 case FDT_STATUS_DISABLED
:
1425 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1427 case FDT_STATUS_FAIL
:
1428 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1430 case FDT_STATUS_FAIL_ERROR_CODE
:
1431 sprintf(buf
, "fail-%d", error_code
);
1432 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1435 printf("Invalid fdt status: %x\n", status
);
1444 * fdt_set_status_by_alias: Set status for the given node given an alias
1446 * @fdt: ptr to device tree
1447 * @alias: alias of node to update
1448 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1449 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1450 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1452 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1453 enum fdt_status status
, unsigned int error_code
)
1455 int offset
= fdt_path_offset(fdt
, alias
);
1457 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1460 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1461 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1466 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1467 if (noff
!= -FDT_ERR_NOTFOUND
) {
1468 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1470 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1471 if (ret
== -FDT_ERR_NOSPACE
) {
1472 ret
= fdt_increase_size(blob
, 512);
1477 } else if (ret
< 0) {
1478 printf("Can't add property: %s\n", fdt_strerror(ret
));
1484 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1490 * Verify the physical address of device tree node for a given alias
1492 * This function locates the device tree node of a given alias, and then
1493 * verifies that the physical address of that device matches the given
1494 * parameter. It displays a message if there is a mismatch.
1496 * Returns 1 on success, 0 on failure
1498 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1505 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1507 /* If there's no such alias, then it's not a failure */
1511 node
= fdt_path_offset(fdt
, path
);
1513 printf("Warning: device tree alias '%s' points to invalid "
1514 "node %s.\n", alias
, path
);
1518 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1520 printf("Warning: device tree node '%s' has no address.\n",
1525 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1526 if (addr
!= dt_addr
) {
1527 printf("Warning: U-Boot configured device %s at address %"
1528 PRIx64
",\n but the device tree has it address %"
1529 PRIx64
".\n", alias
, addr
, dt_addr
);
1537 * Returns the base address of an SOC or PCI node
1539 u64
fdt_get_base_address(void *fdt
, int node
)
1543 const fdt32_t
*prop
;
1545 naddr
= fdt_address_cells(fdt
, node
);
1547 prop
= fdt_getprop(fdt
, node
, "ranges", &size
);
1549 return prop
? fdt_translate_address(fdt
, node
, prop
+ naddr
) : 0;
1553 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1555 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1556 uint64_t *val
, int cells
)
1558 const fdt32_t
*prop32
= &prop
[cell_off
];
1559 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1561 if ((cell_off
+ cells
) > prop_len
)
1562 return -FDT_ERR_NOSPACE
;
1566 *val
= fdt32_to_cpu(*prop32
);
1569 *val
= fdt64_to_cpu(*prop64
);
1572 return -FDT_ERR_NOSPACE
;
1579 * fdt_read_range - Read a node's n'th range property
1581 * @fdt: ptr to device tree
1582 * @node: offset of node
1584 * @child_addr: pointer to storage for the "child address" field
1585 * @addr: pointer to storage for the CPU view translated physical start
1586 * @len: pointer to storage for the range length
1588 * Convenience function that reads and interprets a specific range out of
1589 * a number of the "ranges" property array.
1591 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1592 uint64_t *addr
, uint64_t *len
)
1594 int pnode
= fdt_parent_offset(fdt
, node
);
1595 const fdt32_t
*ranges
;
1604 * The "ranges" property is an array of
1605 * { <child address> <parent address> <size in child address space> }
1607 * All 3 elements can span a diffent number of cells. Fetch their size.
1609 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1610 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1611 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1613 /* Now try to get the ranges property */
1614 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1616 return -FDT_ERR_NOTFOUND
;
1617 ranges_len
/= sizeof(uint32_t);
1619 /* Jump to the n'th entry */
1620 cell
= n
* (pacells
+ acells
+ scells
);
1622 /* Read <child address> */
1624 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1631 /* Read <parent address> */
1633 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1636 /* Read <size in child address space> */
1638 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);
1647 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1649 * @fdt: ptr to device tree
1650 * @node: offset of the simplefb node
1651 * @base_address: framebuffer base address
1652 * @width: width in pixels
1653 * @height: height in pixels
1654 * @stride: bytes per line
1655 * @format: pixel format string
1657 * Convenience function to fill and enable a simplefb node.
1659 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
1660 u32 height
, u32 stride
, const char *format
)
1664 int i
, addrc
, sizec
, ret
;
1666 of_bus_default_count_cells(fdt
, fdt_parent_offset(fdt
, node
),
1670 cells
[i
++] = cpu_to_fdt32(base_address
>> 32);
1671 cells
[i
++] = cpu_to_fdt32(base_address
);
1674 cells
[i
++] = cpu_to_fdt32(height
* stride
);
1676 ret
= fdt_setprop(fdt
, node
, "reg", cells
, sizeof(cells
[0]) * i
);
1680 snprintf(name
, sizeof(name
), "framebuffer@%" PRIx64
, base_address
);
1681 ret
= fdt_set_name(fdt
, node
, name
);
1685 ret
= fdt_setprop_u32(fdt
, node
, "width", width
);
1689 ret
= fdt_setprop_u32(fdt
, node
, "height", height
);
1693 ret
= fdt_setprop_u32(fdt
, node
, "stride", stride
);
1697 ret
= fdt_setprop_string(fdt
, node
, "format", format
);
1701 ret
= fdt_setprop_string(fdt
, node
, "status", "okay");
1709 * Update native-mode in display-timings from display environment variable.
1710 * The node to update are specified by path.
1712 int fdt_fixup_display(void *blob
, const char *path
, const char *display
)
1716 if (!display
|| !path
)
1717 return -FDT_ERR_NOTFOUND
;
1719 toff
= fdt_path_offset(blob
, path
);
1721 toff
= fdt_subnode_offset(blob
, toff
, "display-timings");
1725 for (off
= fdt_first_subnode(blob
, toff
);
1727 off
= fdt_next_subnode(blob
, off
)) {
1728 uint32_t h
= fdt_get_phandle(blob
, off
);
1729 debug("%s:0x%x\n", fdt_get_name(blob
, off
, NULL
),
1731 if (strcasecmp(fdt_get_name(blob
, off
, NULL
), display
) == 0)
1732 return fdt_setprop_u32(blob
, toff
, "native-mode", h
);