3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
11 #include <stdio_dev.h>
12 #include <linux/ctype.h>
13 #include <linux/types.h>
14 #include <asm/global_data.h>
16 #include <fdt_support.h>
20 * Get cells len in bytes
21 * if #NNNN-cells property is 2 then len is 8
24 static int get_cells_len(void *blob
, char *nr_cells_name
)
28 cell
= fdt_getprop(blob
, 0, nr_cells_name
, NULL
);
29 if (cell
&& fdt32_to_cpu(*cell
) == 2)
36 * Write a 4 or 8 byte big endian cell
38 static void write_cell(u8
*addr
, u64 val
, int size
)
40 int shift
= (size
- 1) * 8;
42 *addr
++ = (val
>> shift
) & 0xff;
48 * fdt_getprop_u32_default_node - Return a node's property or a default
50 * @fdt: ptr to device tree
51 * @off: offset of node
52 * @cell: cell offset in property
53 * @prop: property name
54 * @dflt: default value if the property isn't found
56 * Convenience function to return a node's property or a default value if
57 * the property doesn't exist.
59 u32
fdt_getprop_u32_default_node(const void *fdt
, int off
, int cell
,
60 const char *prop
, const u32 dflt
)
65 val
= fdt_getprop(fdt
, off
, prop
, &len
);
67 /* Check if property exists */
71 /* Check if property is long enough */
72 if (len
< ((cell
+ 1) * sizeof(uint32_t)))
75 return fdt32_to_cpu(*val
);
79 * fdt_getprop_u32_default - Find a node and return it's property or a default
81 * @fdt: ptr to device tree
83 * @prop: property name
84 * @dflt: default value if the property isn't found
86 * Convenience function to find a node and return it's property or a
87 * default value if it doesn't exist.
89 u32
fdt_getprop_u32_default(const void *fdt
, const char *path
,
90 const char *prop
, const u32 dflt
)
94 off
= fdt_path_offset(fdt
, path
);
98 return fdt_getprop_u32_default_node(fdt
, off
, 0, prop
, dflt
);
102 * fdt_find_and_setprop: Find a node and set it's property
104 * @fdt: ptr to device tree
105 * @node: path of node
106 * @prop: property name
107 * @val: ptr to new value
108 * @len: length of new property value
109 * @create: flag to create the property if it doesn't exist
111 * Convenience function to directly set a property given the path to the node.
113 int fdt_find_and_setprop(void *fdt
, const char *node
, const char *prop
,
114 const void *val
, int len
, int create
)
116 int nodeoff
= fdt_path_offset(fdt
, node
);
121 if ((!create
) && (fdt_get_property(fdt
, nodeoff
, prop
, NULL
) == NULL
))
122 return 0; /* create flag not set; so exit quietly */
124 return fdt_setprop(fdt
, nodeoff
, prop
, val
, len
);
127 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
129 #ifdef CONFIG_CONS_INDEX
130 static void fdt_fill_multisername(char *sername
, size_t maxlen
)
132 const char *outname
= stdio_devices
[stdout
]->name
;
134 if (strcmp(outname
, "serial") > 0)
135 strncpy(sername
, outname
, maxlen
);
138 if (strcmp(outname
+ 1, "serial") > 0)
139 strncpy(sername
, outname
+ 1, maxlen
);
143 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
146 #ifdef CONFIG_CONS_INDEX
148 char sername
[9] = { 0 };
151 fdt_fill_multisername(sername
, sizeof(sername
) - 1);
153 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
155 err
= node
= fdt_path_offset(fdt
, "/aliases");
158 path
= fdt_getprop(fdt
, node
, sername
, &len
);
160 char *p
= malloc(len
);
161 err
= -FDT_ERR_NOSPACE
;
163 memcpy(p
, path
, len
);
164 err
= fdt_setprop(fdt
, chosenoff
,
165 "linux,stdout-path", p
, len
);
174 printf("WARNING: could not set linux,stdout-path %s.\n",
181 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
, int force
)
183 int nodeoffset
, addr_cell_len
;
189 /* Find the "chosen" node. */
190 nodeoffset
= fdt_path_offset (fdt
, "/chosen");
192 /* If there is no "chosen" node in the blob return */
193 if (nodeoffset
< 0) {
194 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset
));
198 /* just return if initrd_start/end aren't valid */
199 if ((initrd_start
== 0) || (initrd_end
== 0))
202 total
= fdt_num_mem_rsv(fdt
);
205 * Look for an existing entry and update it. If we don't find
206 * the entry, we will j be the next available slot.
208 for (j
= 0; j
< total
; j
++) {
209 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
210 if (addr
== initrd_start
) {
211 fdt_del_mem_rsv(fdt
, j
);
216 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
218 printf("fdt_initrd: %s\n", fdt_strerror(err
));
222 addr_cell_len
= get_cells_len(fdt
, "#address-cells");
224 path
= fdt_getprop(fdt
, nodeoffset
, "linux,initrd-start", NULL
);
225 if ((path
== NULL
) || force
) {
226 write_cell((u8
*)&tmp
, initrd_start
, addr_cell_len
);
227 err
= fdt_setprop(fdt
, nodeoffset
,
228 "linux,initrd-start", &tmp
, addr_cell_len
);
231 "could not set linux,initrd-start %s.\n",
235 write_cell((u8
*)&tmp
, initrd_end
, addr_cell_len
);
236 err
= fdt_setprop(fdt
, nodeoffset
,
237 "linux,initrd-end", &tmp
, addr_cell_len
);
239 printf("WARNING: could not set linux,initrd-end %s.\n",
249 int fdt_chosen(void *fdt
, int force
)
253 char *str
; /* used to set string properties */
256 err
= fdt_check_header(fdt
);
258 printf("fdt_chosen: %s\n", fdt_strerror(err
));
263 * Find the "chosen" node.
265 nodeoffset
= fdt_path_offset (fdt
, "/chosen");
268 * If there is no "chosen" node in the blob, create it.
270 if (nodeoffset
< 0) {
272 * Create a new node "/chosen" (offset 0 is root level)
274 nodeoffset
= fdt_add_subnode(fdt
, 0, "chosen");
275 if (nodeoffset
< 0) {
276 printf("WARNING: could not create /chosen %s.\n",
277 fdt_strerror(nodeoffset
));
283 * Create /chosen properites that don't exist in the fdt.
284 * If the property exists, update it only if the "force" parameter
287 str
= getenv("bootargs");
289 path
= fdt_getprop(fdt
, nodeoffset
, "bootargs", NULL
);
290 if ((path
== NULL
) || force
) {
291 err
= fdt_setprop(fdt
, nodeoffset
,
292 "bootargs", str
, strlen(str
)+1);
294 printf("WARNING: could not set bootargs %s.\n",
299 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
300 path
= fdt_getprop(fdt
, nodeoffset
, "linux,stdout-path", NULL
);
301 if ((path
== NULL
) || force
)
302 err
= fdt_fixup_stdout(fdt
, nodeoffset
);
305 #ifdef OF_STDOUT_PATH
306 path
= fdt_getprop(fdt
, nodeoffset
, "linux,stdout-path", NULL
);
307 if ((path
== NULL
) || force
) {
308 err
= fdt_setprop(fdt
, nodeoffset
,
309 "linux,stdout-path", OF_STDOUT_PATH
, strlen(OF_STDOUT_PATH
)+1);
311 printf("WARNING: could not set linux,stdout-path %s.\n",
319 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
320 const void *val
, int len
, int create
)
324 debug("Updating property '%s/%s' = ", path
, prop
);
325 for (i
= 0; i
< len
; i
++)
326 debug(" %.2x", *(u8
*)(val
+i
));
329 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
331 printf("Unable to update property %s:%s, err=%s\n",
332 path
, prop
, fdt_strerror(rc
));
335 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
338 fdt32_t tmp
= cpu_to_fdt32(val
);
339 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
342 void do_fixup_by_prop(void *fdt
,
343 const char *pname
, const void *pval
, int plen
,
344 const char *prop
, const void *val
, int len
,
350 debug("Updating property '%s' = ", prop
);
351 for (i
= 0; i
< len
; i
++)
352 debug(" %.2x", *(u8
*)(val
+i
));
355 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
356 while (off
!= -FDT_ERR_NOTFOUND
) {
357 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
358 fdt_setprop(fdt
, off
, prop
, val
, len
);
359 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
363 void do_fixup_by_prop_u32(void *fdt
,
364 const char *pname
, const void *pval
, int plen
,
365 const char *prop
, u32 val
, int create
)
367 fdt32_t tmp
= cpu_to_fdt32(val
);
368 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
371 void do_fixup_by_compat(void *fdt
, const char *compat
,
372 const char *prop
, const void *val
, int len
, int create
)
377 debug("Updating property '%s' = ", prop
);
378 for (i
= 0; i
< len
; i
++)
379 debug(" %.2x", *(u8
*)(val
+i
));
382 off
= fdt_node_offset_by_compatible(fdt
, -1, compat
);
383 while (off
!= -FDT_ERR_NOTFOUND
) {
384 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
385 fdt_setprop(fdt
, off
, prop
, val
, len
);
386 off
= fdt_node_offset_by_compatible(fdt
, off
, compat
);
390 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
391 const char *prop
, u32 val
, int create
)
393 fdt32_t tmp
= cpu_to_fdt32(val
);
394 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
397 #ifdef CONFIG_NR_DRAM_BANKS
398 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
400 #define MEMORY_BANKS_MAX 4
402 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
405 int addr_cell_len
, size_cell_len
, len
;
406 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
409 if (banks
> MEMORY_BANKS_MAX
) {
410 printf("%s: num banks %d exceeds hardcoded limit %d."
411 " Recompile with higher MEMORY_BANKS_MAX?\n",
412 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
416 err
= fdt_check_header(blob
);
418 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
422 /* update, or add and update /memory node */
423 nodeoffset
= fdt_path_offset(blob
, "/memory");
424 if (nodeoffset
< 0) {
425 nodeoffset
= fdt_add_subnode(blob
, 0, "memory");
426 if (nodeoffset
< 0) {
427 printf("WARNING: could not create /memory: %s.\n",
428 fdt_strerror(nodeoffset
));
432 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
435 printf("WARNING: could not set %s %s.\n", "device_type",
440 addr_cell_len
= get_cells_len(blob
, "#address-cells");
441 size_cell_len
= get_cells_len(blob
, "#size-cells");
443 for (bank
= 0, len
= 0; bank
< banks
; bank
++) {
444 write_cell(tmp
+ len
, start
[bank
], addr_cell_len
);
445 len
+= addr_cell_len
;
447 write_cell(tmp
+ len
, size
[bank
], size_cell_len
);
448 len
+= size_cell_len
;
451 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
453 printf("WARNING: could not set %s %s.\n",
454 "reg", fdt_strerror(err
));
460 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
462 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
465 void fdt_fixup_ethernet(void *fdt
)
468 char enet
[16], *tmp
, *end
;
471 unsigned char mac_addr
[6];
473 node
= fdt_path_offset(fdt
, "/aliases");
477 if (!getenv("ethaddr")) {
478 if (getenv("usbethaddr")) {
479 strcpy(mac
, "usbethaddr");
481 debug("No ethernet MAC Address defined\n");
485 strcpy(mac
, "ethaddr");
489 while ((tmp
= getenv(mac
)) != NULL
) {
490 sprintf(enet
, "ethernet%d", i
);
491 path
= fdt_getprop(fdt
, node
, enet
, NULL
);
493 debug("No alias for %s\n", enet
);
494 sprintf(mac
, "eth%daddr", ++i
);
498 for (j
= 0; j
< 6; j
++) {
499 mac_addr
[j
] = tmp
? simple_strtoul(tmp
, &end
, 16) : 0;
501 tmp
= (*end
) ? end
+1 : end
;
504 do_fixup_by_path(fdt
, path
, "mac-address", &mac_addr
, 6, 0);
505 do_fixup_by_path(fdt
, path
, "local-mac-address",
508 sprintf(mac
, "eth%daddr", ++i
);
512 /* Resize the fdt to its actual size + a bit of padding */
513 int fdt_resize(void *blob
)
523 total
= fdt_num_mem_rsv(blob
);
524 for (i
= 0; i
< total
; i
++) {
525 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
526 if (addr
== (uintptr_t)blob
) {
527 fdt_del_mem_rsv(blob
, i
);
533 * Calculate the actual size of the fdt
534 * plus the size needed for 5 fdt_add_mem_rsv, one
535 * for the fdt itself and 4 for a possible initrd
536 * ((initrd-start + initrd-end) * 2 (name & value))
538 actualsize
= fdt_off_dt_strings(blob
) +
539 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
541 /* Make it so the fdt ends on a page boundary */
542 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
543 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
545 /* Change the fdt header to reflect the correct size */
546 fdt_set_totalsize(blob
, actualsize
);
548 /* Add the new reservation */
549 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
557 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
559 #define FDT_PCI_PREFETCH (0x40000000)
560 #define FDT_PCI_MEM32 (0x02000000)
561 #define FDT_PCI_IO (0x01000000)
562 #define FDT_PCI_MEM64 (0x03000000)
564 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
566 int addrcell
, sizecell
, len
, r
;
568 /* sized based on pci addr cells, size-cells, & address-cells */
569 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
571 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
572 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
574 dma_range
= &dma_ranges
[0];
575 for (r
= 0; r
< hose
->region_count
; r
++) {
576 u64 bus_start
, phys_start
, size
;
578 /* skip if !PCI_REGION_SYS_MEMORY */
579 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
582 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
583 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
584 size
= (u64
)hose
->regions
[r
].size
;
587 if (size
>= 0x100000000ull
)
588 dma_range
[0] |= FDT_PCI_MEM64
;
590 dma_range
[0] |= FDT_PCI_MEM32
;
591 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
592 dma_range
[0] |= FDT_PCI_PREFETCH
;
593 #ifdef CONFIG_SYS_PCI_64BIT
594 dma_range
[1] = bus_start
>> 32;
598 dma_range
[2] = bus_start
& 0xffffffff;
601 dma_range
[3] = phys_start
>> 32;
602 dma_range
[4] = phys_start
& 0xffffffff;
604 dma_range
[3] = phys_start
& 0xffffffff;
608 dma_range
[3 + addrcell
+ 0] = size
>> 32;
609 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
611 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
614 dma_range
+= (3 + addrcell
+ sizecell
);
617 len
= dma_range
- &dma_ranges
[0];
619 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
625 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
627 * Provide a weak default function to return the flash bank size.
628 * There might be multiple non-identical flash chips connected to one
629 * chip-select, so we need to pass an index as well.
631 u32
__flash_get_bank_size(int cs
, int idx
)
633 extern flash_info_t flash_info
[];
636 * As default, a simple 1:1 mapping is provided. Boards with
637 * a different mapping need to supply a board specific mapping
640 return flash_info
[cs
].size
;
642 u32
flash_get_bank_size(int cs
, int idx
)
643 __attribute__((weak
, alias("__flash_get_bank_size")));
646 * This function can be used to update the size in the "reg" property
647 * of all NOR FLASH device nodes. This is necessary for boards with
648 * non-fixed NOR FLASH sizes.
650 int fdt_fixup_nor_flash_size(void *blob
)
652 char compat
[][16] = { "cfi-flash", "jedec-flash" };
655 struct fdt_property
*prop
;
659 for (i
= 0; i
< 2; i
++) {
660 off
= fdt_node_offset_by_compatible(blob
, -1, compat
[i
]);
661 while (off
!= -FDT_ERR_NOTFOUND
) {
665 * Found one compatible node, so fixup the size
666 * int its reg properties
668 prop
= fdt_get_property_w(blob
, off
, "reg", &len
);
670 int tuple_size
= 3 * sizeof(reg
);
673 * There might be multiple reg-tuples,
674 * so loop through them all
676 reg
= reg2
= (u32
*)&prop
->data
[0];
677 for (idx
= 0; idx
< (len
/ tuple_size
); idx
++) {
679 * Update size in reg property
681 reg
[2] = flash_get_bank_size(reg
[0],
685 * Point to next reg tuple
690 fdt_setprop(blob
, off
, "reg", reg2
, len
);
693 /* Move to next compatible node */
694 off
= fdt_node_offset_by_compatible(blob
, off
,
703 int fdt_increase_size(void *fdt
, int add_len
)
707 newlen
= fdt_totalsize(fdt
) + add_len
;
709 /* Open in place with a new len */
710 return fdt_open_into(fdt
, fdt
, newlen
);
713 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
714 #include <jffs2/load_kernel.h>
715 #include <mtd_node.h>
722 int fdt_del_subnodes(const void *blob
, int parent_offset
)
727 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
728 (off
>= 0) && (ndepth
> 0);
729 off
= fdt_next_node(blob
, off
, &ndepth
)) {
731 debug("delete %s: offset: %x\n",
732 fdt_get_name(blob
, off
, 0), off
);
733 ret
= fdt_del_node((void *)blob
, off
);
735 printf("Can't delete node: %s\n",
747 int fdt_del_partitions(void *blob
, int parent_offset
)
754 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
755 if (off
> 0 && ndepth
== 1) {
756 prop
= fdt_getprop(blob
, off
, "label", NULL
);
759 * Could not find label property, nand {}; node?
760 * Check subnode, delete partitions there if any.
762 return fdt_del_partitions(blob
, off
);
764 ret
= fdt_del_subnodes(blob
, parent_offset
);
766 printf("Can't remove subnodes: %s\n",
775 int fdt_node_set_part_info(void *blob
, int parent_offset
,
776 struct mtd_device
*dev
)
778 struct list_head
*pentry
;
779 struct part_info
*part
;
780 struct reg_cell cell
;
785 ret
= fdt_del_partitions(blob
, parent_offset
);
790 * Check if it is nand {}; subnode, adjust
791 * the offset in this case
793 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
794 if (off
> 0 && ndepth
== 1)
798 list_for_each_prev(pentry
, &dev
->parts
) {
801 part
= list_entry(pentry
, struct part_info
, link
);
803 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
804 part_num
, part
->name
, part
->size
,
805 part
->offset
, part
->mask_flags
);
807 sprintf(buf
, "partition@%llx", part
->offset
);
809 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
810 if (ret
== -FDT_ERR_NOSPACE
) {
811 ret
= fdt_increase_size(blob
, 512);
816 } else if (ret
< 0) {
817 printf("Can't add partition node: %s\n",
823 /* Check MTD_WRITEABLE_CMD flag */
824 if (part
->mask_flags
& 1) {
826 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
827 if (ret
== -FDT_ERR_NOSPACE
) {
828 ret
= fdt_increase_size(blob
, 512);
837 cell
.r0
= cpu_to_fdt32(part
->offset
);
838 cell
.r1
= cpu_to_fdt32(part
->size
);
840 ret
= fdt_setprop(blob
, newoff
, "reg", &cell
, sizeof(cell
));
841 if (ret
== -FDT_ERR_NOSPACE
) {
842 ret
= fdt_increase_size(blob
, 512);
851 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
852 if (ret
== -FDT_ERR_NOSPACE
) {
853 ret
= fdt_increase_size(blob
, 512);
865 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
868 printf("Can't add property: %s\n", fdt_strerror(ret
));
873 * Update partitions in nor/nand nodes using info from
874 * mtdparts environment variable. The nodes to update are
875 * specified by node_info structure which contains mtd device
876 * type and compatible string: E. g. the board code in
877 * ft_board_setup() could use:
879 * struct node_info nodes[] = {
880 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
881 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
884 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
886 void fdt_fixup_mtdparts(void *blob
, void *node_info
, int node_info_size
)
888 struct node_info
*ni
= node_info
;
889 struct mtd_device
*dev
;
894 parts
= getenv("mtdparts");
898 if (mtdparts_init() != 0)
901 for (i
= 0; i
< node_info_size
; i
++) {
903 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
904 while (noff
!= -FDT_ERR_NOTFOUND
) {
905 debug("%s: %s, mtd dev type %d\n",
906 fdt_get_name(blob
, noff
, 0),
907 ni
[i
].compat
, ni
[i
].type
);
908 dev
= device_find(ni
[i
].type
, idx
++);
910 if (fdt_node_set_part_info(blob
, noff
, dev
))
911 return; /* return on error */
914 /* Jump to next flash node */
915 noff
= fdt_node_offset_by_compatible(blob
, noff
,
922 void fdt_del_node_and_alias(void *blob
, const char *alias
)
924 int off
= fdt_path_offset(blob
, alias
);
929 fdt_del_node(blob
, off
);
931 off
= fdt_path_offset(blob
, "/aliases");
932 fdt_delprop(blob
, off
, alias
);
935 /* Helper to read a big number; size is in cells (not bytes) */
936 static inline u64
of_read_number(const fdt32_t
*cell
, int size
)
940 r
= (r
<< 32) | fdt32_to_cpu(*(cell
++));
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 static void of_bus_default_count_cells(void *blob
, int parentoffset
,
978 int *addrc
, int *sizec
)
983 prop
= fdt_getprop(blob
, parentoffset
, "#address-cells", NULL
);
985 *addrc
= be32_to_cpup(prop
);
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="PRu64
", s="PRu64
", da="PRu64
"\n",
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: "PRu64
"\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
, ns
)) {
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
, pns
)) {
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
)
1213 int offset
, phandle
= 0;
1215 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1216 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1217 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1224 * fdt_set_phandle: Create a phandle property for the given node
1226 * @fdt: ptr to device tree
1227 * @nodeoffset: node to update
1228 * @phandle: phandle value to set (must be unique)
1230 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1235 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1237 if ((off
>= 0) && (off
!= nodeoffset
)) {
1240 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1241 printf("Trying to update node %s with phandle %u ",
1244 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1245 printf("that already exists in node %s.\n", buf
);
1246 return -FDT_ERR_BADPHANDLE
;
1250 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1255 * For now, also set the deprecated "linux,phandle" property, so that we
1256 * don't break older kernels.
1258 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1264 * fdt_create_phandle: Create a phandle property for the given node
1266 * @fdt: ptr to device tree
1267 * @nodeoffset: node to update
1269 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1271 /* see if there is a phandle already */
1272 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1274 /* if we got 0, means no phandle so create one */
1278 phandle
= fdt_alloc_phandle(fdt
);
1279 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1281 printf("Can't set phandle %u: %s\n", phandle
,
1291 * fdt_set_node_status: Set status for the given node
1293 * @fdt: ptr to device tree
1294 * @nodeoffset: node to update
1295 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1296 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1297 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1299 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1300 enum fdt_status status
, unsigned int error_code
)
1309 case FDT_STATUS_OKAY
:
1310 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1312 case FDT_STATUS_DISABLED
:
1313 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1315 case FDT_STATUS_FAIL
:
1316 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1318 case FDT_STATUS_FAIL_ERROR_CODE
:
1319 sprintf(buf
, "fail-%d", error_code
);
1320 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1323 printf("Invalid fdt status: %x\n", status
);
1332 * fdt_set_status_by_alias: Set status for the given node given an alias
1334 * @fdt: ptr to device tree
1335 * @alias: alias of node to update
1336 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1337 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1338 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1340 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1341 enum fdt_status status
, unsigned int error_code
)
1343 int offset
= fdt_path_offset(fdt
, alias
);
1345 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1348 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1349 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1354 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1355 if (noff
!= -FDT_ERR_NOTFOUND
) {
1356 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1358 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1359 if (ret
== -FDT_ERR_NOSPACE
) {
1360 ret
= fdt_increase_size(blob
, 512);
1365 } else if (ret
< 0) {
1366 printf("Can't add property: %s\n", fdt_strerror(ret
));
1372 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1378 * Verify the physical address of device tree node for a given alias
1380 * This function locates the device tree node of a given alias, and then
1381 * verifies that the physical address of that device matches the given
1382 * parameter. It displays a message if there is a mismatch.
1384 * Returns 1 on success, 0 on failure
1386 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1393 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1395 /* If there's no such alias, then it's not a failure */
1399 node
= fdt_path_offset(fdt
, path
);
1401 printf("Warning: device tree alias '%s' points to invalid "
1402 "node %s.\n", alias
, path
);
1406 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1408 printf("Warning: device tree node '%s' has no address.\n",
1413 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1414 if (addr
!= dt_addr
) {
1415 printf("Warning: U-Boot configured device %s at address %llx,\n"
1416 " but the device tree has it address %llx.\n",
1417 alias
, addr
, dt_addr
);
1425 * Returns the base address of an SOC or PCI node
1427 u64
fdt_get_base_address(void *fdt
, int node
)
1431 const fdt32_t
*prop
;
1433 prop
= fdt_getprop(fdt
, node
, "#address-cells", &size
);
1434 if (prop
&& size
== 4)
1435 naddr
= be32_to_cpup(prop
);
1439 prop
= fdt_getprop(fdt
, node
, "ranges", &size
);
1441 return prop
? fdt_translate_address(fdt
, node
, prop
+ naddr
) : 0;
1445 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1447 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1448 uint64_t *val
, int cells
)
1450 const fdt32_t
*prop32
= &prop
[cell_off
];
1451 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1453 if ((cell_off
+ cells
) > prop_len
)
1454 return -FDT_ERR_NOSPACE
;
1458 *val
= fdt32_to_cpu(*prop32
);
1461 *val
= fdt64_to_cpu(*prop64
);
1464 return -FDT_ERR_NOSPACE
;
1471 * fdt_read_range - Read a node's n'th range property
1473 * @fdt: ptr to device tree
1474 * @node: offset of node
1476 * @child_addr: pointer to storage for the "child address" field
1477 * @addr: pointer to storage for the CPU view translated physical start
1478 * @len: pointer to storage for the range length
1480 * Convenience function that reads and interprets a specific range out of
1481 * a number of the "ranges" property array.
1483 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1484 uint64_t *addr
, uint64_t *len
)
1486 int pnode
= fdt_parent_offset(fdt
, node
);
1487 const fdt32_t
*ranges
;
1496 * The "ranges" property is an array of
1497 * { <child address> <parent address> <size in child address space> }
1499 * All 3 elements can span a diffent number of cells. Fetch their size.
1501 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1502 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1503 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1505 /* Now try to get the ranges property */
1506 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1508 return -FDT_ERR_NOTFOUND
;
1509 ranges_len
/= sizeof(uint32_t);
1511 /* Jump to the n'th entry */
1512 cell
= n
* (pacells
+ acells
+ scells
);
1514 /* Read <child address> */
1516 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1523 /* Read <parent address> */
1525 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1528 /* Read <size in child address space> */
1530 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);