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 * Global data (for the gd->bd)
22 DECLARE_GLOBAL_DATA_PTR
;
25 * Get cells len in bytes
26 * if #NNNN-cells property is 2 then len is 8
29 static int get_cells_len(void *blob
, char *nr_cells_name
)
33 cell
= fdt_getprop(blob
, 0, nr_cells_name
, NULL
);
34 if (cell
&& fdt32_to_cpu(*cell
) == 2)
41 * Write a 4 or 8 byte big endian cell
43 static void write_cell(u8
*addr
, u64 val
, int size
)
45 int shift
= (size
- 1) * 8;
47 *addr
++ = (val
>> shift
) & 0xff;
53 * fdt_getprop_u32_default_node - Return a node's property or a default
55 * @fdt: ptr to device tree
56 * @off: offset of node
57 * @cell: cell offset in property
58 * @prop: property name
59 * @dflt: default value if the property isn't found
61 * Convenience function to return a node's property or a default value if
62 * the property doesn't exist.
64 u32
fdt_getprop_u32_default_node(const void *fdt
, int off
, int cell
,
65 const char *prop
, const u32 dflt
)
70 val
= fdt_getprop(fdt
, off
, prop
, &len
);
72 /* Check if property exists */
76 /* Check if property is long enough */
77 if (len
< ((cell
+ 1) * sizeof(uint32_t)))
80 return fdt32_to_cpu(*val
);
84 * fdt_getprop_u32_default - Find a node and return it's property or a default
86 * @fdt: ptr to device tree
88 * @prop: property name
89 * @dflt: default value if the property isn't found
91 * Convenience function to find a node and return it's property or a
92 * default value if it doesn't exist.
94 u32
fdt_getprop_u32_default(const void *fdt
, const char *path
,
95 const char *prop
, const u32 dflt
)
99 off
= fdt_path_offset(fdt
, path
);
103 return fdt_getprop_u32_default_node(fdt
, off
, 0, prop
, dflt
);
107 * fdt_find_and_setprop: Find a node and set it's property
109 * @fdt: ptr to device tree
110 * @node: path of node
111 * @prop: property name
112 * @val: ptr to new value
113 * @len: length of new property value
114 * @create: flag to create the property if it doesn't exist
116 * Convenience function to directly set a property given the path to the node.
118 int fdt_find_and_setprop(void *fdt
, const char *node
, const char *prop
,
119 const void *val
, int len
, int create
)
121 int nodeoff
= fdt_path_offset(fdt
, node
);
126 if ((!create
) && (fdt_get_property(fdt
, nodeoff
, prop
, NULL
) == NULL
))
127 return 0; /* create flag not set; so exit quietly */
129 return fdt_setprop(fdt
, nodeoff
, prop
, val
, len
);
132 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
134 #ifdef CONFIG_CONS_INDEX
135 static void fdt_fill_multisername(char *sername
, size_t maxlen
)
137 const char *outname
= stdio_devices
[stdout
]->name
;
139 if (strcmp(outname
, "serial") > 0)
140 strncpy(sername
, outname
, maxlen
);
143 if (strcmp(outname
+ 1, "serial") > 0)
144 strncpy(sername
, outname
+ 1, maxlen
);
148 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
151 #ifdef CONFIG_CONS_INDEX
153 char sername
[9] = { 0 };
156 fdt_fill_multisername(sername
, sizeof(sername
) - 1);
158 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
160 err
= node
= fdt_path_offset(fdt
, "/aliases");
163 path
= fdt_getprop(fdt
, node
, sername
, &len
);
165 char *p
= malloc(len
);
166 err
= -FDT_ERR_NOSPACE
;
168 memcpy(p
, path
, len
);
169 err
= fdt_setprop(fdt
, chosenoff
,
170 "linux,stdout-path", p
, len
);
179 printf("WARNING: could not set linux,stdout-path %s.\n",
186 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
, int force
)
188 int nodeoffset
, addr_cell_len
;
194 /* Find the "chosen" node. */
195 nodeoffset
= fdt_path_offset (fdt
, "/chosen");
197 /* If there is no "chosen" node in the blob return */
198 if (nodeoffset
< 0) {
199 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset
));
203 /* just return if initrd_start/end aren't valid */
204 if ((initrd_start
== 0) || (initrd_end
== 0))
207 total
= fdt_num_mem_rsv(fdt
);
210 * Look for an existing entry and update it. If we don't find
211 * the entry, we will j be the next available slot.
213 for (j
= 0; j
< total
; j
++) {
214 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
215 if (addr
== initrd_start
) {
216 fdt_del_mem_rsv(fdt
, j
);
221 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
223 printf("fdt_initrd: %s\n", fdt_strerror(err
));
227 addr_cell_len
= get_cells_len(fdt
, "#address-cells");
229 path
= fdt_getprop(fdt
, nodeoffset
, "linux,initrd-start", NULL
);
230 if ((path
== NULL
) || force
) {
231 write_cell((u8
*)&tmp
, initrd_start
, addr_cell_len
);
232 err
= fdt_setprop(fdt
, nodeoffset
,
233 "linux,initrd-start", &tmp
, addr_cell_len
);
236 "could not set linux,initrd-start %s.\n",
240 write_cell((u8
*)&tmp
, initrd_end
, addr_cell_len
);
241 err
= fdt_setprop(fdt
, nodeoffset
,
242 "linux,initrd-end", &tmp
, addr_cell_len
);
244 printf("WARNING: could not set linux,initrd-end %s.\n",
254 int fdt_chosen(void *fdt
, int force
)
258 char *str
; /* used to set string properties */
261 err
= fdt_check_header(fdt
);
263 printf("fdt_chosen: %s\n", fdt_strerror(err
));
268 * Find the "chosen" node.
270 nodeoffset
= fdt_path_offset (fdt
, "/chosen");
273 * If there is no "chosen" node in the blob, create it.
275 if (nodeoffset
< 0) {
277 * Create a new node "/chosen" (offset 0 is root level)
279 nodeoffset
= fdt_add_subnode(fdt
, 0, "chosen");
280 if (nodeoffset
< 0) {
281 printf("WARNING: could not create /chosen %s.\n",
282 fdt_strerror(nodeoffset
));
288 * Create /chosen properites that don't exist in the fdt.
289 * If the property exists, update it only if the "force" parameter
292 str
= getenv("bootargs");
294 path
= fdt_getprop(fdt
, nodeoffset
, "bootargs", NULL
);
295 if ((path
== NULL
) || force
) {
296 err
= fdt_setprop(fdt
, nodeoffset
,
297 "bootargs", str
, strlen(str
)+1);
299 printf("WARNING: could not set bootargs %s.\n",
304 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
305 path
= fdt_getprop(fdt
, nodeoffset
, "linux,stdout-path", NULL
);
306 if ((path
== NULL
) || force
)
307 err
= fdt_fixup_stdout(fdt
, nodeoffset
);
310 #ifdef OF_STDOUT_PATH
311 path
= fdt_getprop(fdt
, nodeoffset
, "linux,stdout-path", NULL
);
312 if ((path
== NULL
) || force
) {
313 err
= fdt_setprop(fdt
, nodeoffset
,
314 "linux,stdout-path", OF_STDOUT_PATH
, strlen(OF_STDOUT_PATH
)+1);
316 printf("WARNING: could not set linux,stdout-path %s.\n",
324 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
325 const void *val
, int len
, int create
)
329 debug("Updating property '%s/%s' = ", path
, prop
);
330 for (i
= 0; i
< len
; i
++)
331 debug(" %.2x", *(u8
*)(val
+i
));
334 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
336 printf("Unable to update property %s:%s, err=%s\n",
337 path
, prop
, fdt_strerror(rc
));
340 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
343 fdt32_t tmp
= cpu_to_fdt32(val
);
344 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
347 void do_fixup_by_prop(void *fdt
,
348 const char *pname
, const void *pval
, int plen
,
349 const char *prop
, const void *val
, int len
,
355 debug("Updating property '%s' = ", prop
);
356 for (i
= 0; i
< len
; i
++)
357 debug(" %.2x", *(u8
*)(val
+i
));
360 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
361 while (off
!= -FDT_ERR_NOTFOUND
) {
362 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
363 fdt_setprop(fdt
, off
, prop
, val
, len
);
364 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
368 void do_fixup_by_prop_u32(void *fdt
,
369 const char *pname
, const void *pval
, int plen
,
370 const char *prop
, u32 val
, int create
)
372 fdt32_t tmp
= cpu_to_fdt32(val
);
373 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
376 void do_fixup_by_compat(void *fdt
, const char *compat
,
377 const char *prop
, const void *val
, int len
, int create
)
382 debug("Updating property '%s' = ", prop
);
383 for (i
= 0; i
< len
; i
++)
384 debug(" %.2x", *(u8
*)(val
+i
));
387 off
= fdt_node_offset_by_compatible(fdt
, -1, compat
);
388 while (off
!= -FDT_ERR_NOTFOUND
) {
389 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
390 fdt_setprop(fdt
, off
, prop
, val
, len
);
391 off
= fdt_node_offset_by_compatible(fdt
, off
, compat
);
395 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
396 const char *prop
, u32 val
, int create
)
398 fdt32_t tmp
= cpu_to_fdt32(val
);
399 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
402 #ifdef CONFIG_NR_DRAM_BANKS
403 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
405 #define MEMORY_BANKS_MAX 4
407 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
410 int addr_cell_len
, size_cell_len
, len
;
411 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
414 if (banks
> MEMORY_BANKS_MAX
) {
415 printf("%s: num banks %d exceeds hardcoded limit %d."
416 " Recompile with higher MEMORY_BANKS_MAX?\n",
417 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
421 err
= fdt_check_header(blob
);
423 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
427 /* update, or add and update /memory node */
428 nodeoffset
= fdt_path_offset(blob
, "/memory");
429 if (nodeoffset
< 0) {
430 nodeoffset
= fdt_add_subnode(blob
, 0, "memory");
431 if (nodeoffset
< 0) {
432 printf("WARNING: could not create /memory: %s.\n",
433 fdt_strerror(nodeoffset
));
437 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
440 printf("WARNING: could not set %s %s.\n", "device_type",
445 addr_cell_len
= get_cells_len(blob
, "#address-cells");
446 size_cell_len
= get_cells_len(blob
, "#size-cells");
448 for (bank
= 0, len
= 0; bank
< banks
; bank
++) {
449 write_cell(tmp
+ len
, start
[bank
], addr_cell_len
);
450 len
+= addr_cell_len
;
452 write_cell(tmp
+ len
, size
[bank
], size_cell_len
);
453 len
+= size_cell_len
;
456 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
458 printf("WARNING: could not set %s %s.\n",
459 "reg", fdt_strerror(err
));
465 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
467 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
470 void fdt_fixup_ethernet(void *fdt
)
473 char enet
[16], *tmp
, *end
;
476 unsigned char mac_addr
[6];
478 node
= fdt_path_offset(fdt
, "/aliases");
483 strcpy(mac
, "ethaddr");
484 while ((tmp
= getenv(mac
)) != NULL
) {
485 sprintf(enet
, "ethernet%d", i
);
486 path
= fdt_getprop(fdt
, node
, enet
, NULL
);
488 debug("No alias for %s\n", enet
);
489 sprintf(mac
, "eth%daddr", ++i
);
493 for (j
= 0; j
< 6; j
++) {
494 mac_addr
[j
] = tmp
? simple_strtoul(tmp
, &end
, 16) : 0;
496 tmp
= (*end
) ? end
+1 : end
;
499 do_fixup_by_path(fdt
, path
, "mac-address", &mac_addr
, 6, 0);
500 do_fixup_by_path(fdt
, path
, "local-mac-address",
503 sprintf(mac
, "eth%daddr", ++i
);
507 /* Resize the fdt to its actual size + a bit of padding */
508 int fdt_resize(void *blob
)
518 total
= fdt_num_mem_rsv(blob
);
519 for (i
= 0; i
< total
; i
++) {
520 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
521 if (addr
== (uintptr_t)blob
) {
522 fdt_del_mem_rsv(blob
, i
);
528 * Calculate the actual size of the fdt
529 * plus the size needed for 5 fdt_add_mem_rsv, one
530 * for the fdt itself and 4 for a possible initrd
531 * ((initrd-start + initrd-end) * 2 (name & value))
533 actualsize
= fdt_off_dt_strings(blob
) +
534 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
536 /* Make it so the fdt ends on a page boundary */
537 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
538 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
540 /* Change the fdt header to reflect the correct size */
541 fdt_set_totalsize(blob
, actualsize
);
543 /* Add the new reservation */
544 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
552 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
554 #define FDT_PCI_PREFETCH (0x40000000)
555 #define FDT_PCI_MEM32 (0x02000000)
556 #define FDT_PCI_IO (0x01000000)
557 #define FDT_PCI_MEM64 (0x03000000)
559 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
561 int addrcell
, sizecell
, len
, r
;
563 /* sized based on pci addr cells, size-cells, & address-cells */
564 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
566 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
567 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
569 dma_range
= &dma_ranges
[0];
570 for (r
= 0; r
< hose
->region_count
; r
++) {
571 u64 bus_start
, phys_start
, size
;
573 /* skip if !PCI_REGION_SYS_MEMORY */
574 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
577 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
578 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
579 size
= (u64
)hose
->regions
[r
].size
;
582 if (size
>= 0x100000000ull
)
583 dma_range
[0] |= FDT_PCI_MEM64
;
585 dma_range
[0] |= FDT_PCI_MEM32
;
586 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
587 dma_range
[0] |= FDT_PCI_PREFETCH
;
588 #ifdef CONFIG_SYS_PCI_64BIT
589 dma_range
[1] = bus_start
>> 32;
593 dma_range
[2] = bus_start
& 0xffffffff;
596 dma_range
[3] = phys_start
>> 32;
597 dma_range
[4] = phys_start
& 0xffffffff;
599 dma_range
[3] = phys_start
& 0xffffffff;
603 dma_range
[3 + addrcell
+ 0] = size
>> 32;
604 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
606 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
609 dma_range
+= (3 + addrcell
+ sizecell
);
612 len
= dma_range
- &dma_ranges
[0];
614 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
620 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
622 * Provide a weak default function to return the flash bank size.
623 * There might be multiple non-identical flash chips connected to one
624 * chip-select, so we need to pass an index as well.
626 u32
__flash_get_bank_size(int cs
, int idx
)
628 extern flash_info_t flash_info
[];
631 * As default, a simple 1:1 mapping is provided. Boards with
632 * a different mapping need to supply a board specific mapping
635 return flash_info
[cs
].size
;
637 u32
flash_get_bank_size(int cs
, int idx
)
638 __attribute__((weak
, alias("__flash_get_bank_size")));
641 * This function can be used to update the size in the "reg" property
642 * of all NOR FLASH device nodes. This is necessary for boards with
643 * non-fixed NOR FLASH sizes.
645 int fdt_fixup_nor_flash_size(void *blob
)
647 char compat
[][16] = { "cfi-flash", "jedec-flash" };
650 struct fdt_property
*prop
;
654 for (i
= 0; i
< 2; i
++) {
655 off
= fdt_node_offset_by_compatible(blob
, -1, compat
[i
]);
656 while (off
!= -FDT_ERR_NOTFOUND
) {
660 * Found one compatible node, so fixup the size
661 * int its reg properties
663 prop
= fdt_get_property_w(blob
, off
, "reg", &len
);
665 int tuple_size
= 3 * sizeof(reg
);
668 * There might be multiple reg-tuples,
669 * so loop through them all
671 reg
= reg2
= (u32
*)&prop
->data
[0];
672 for (idx
= 0; idx
< (len
/ tuple_size
); idx
++) {
674 * Update size in reg property
676 reg
[2] = flash_get_bank_size(reg
[0],
680 * Point to next reg tuple
685 fdt_setprop(blob
, off
, "reg", reg2
, len
);
688 /* Move to next compatible node */
689 off
= fdt_node_offset_by_compatible(blob
, off
,
698 int fdt_increase_size(void *fdt
, int add_len
)
702 newlen
= fdt_totalsize(fdt
) + add_len
;
704 /* Open in place with a new len */
705 return fdt_open_into(fdt
, fdt
, newlen
);
708 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
709 #include <jffs2/load_kernel.h>
710 #include <mtd_node.h>
717 int fdt_del_subnodes(const void *blob
, int parent_offset
)
722 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
723 (off
>= 0) && (ndepth
> 0);
724 off
= fdt_next_node(blob
, off
, &ndepth
)) {
726 debug("delete %s: offset: %x\n",
727 fdt_get_name(blob
, off
, 0), off
);
728 ret
= fdt_del_node((void *)blob
, off
);
730 printf("Can't delete node: %s\n",
742 int fdt_del_partitions(void *blob
, int parent_offset
)
749 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
750 if (off
> 0 && ndepth
== 1) {
751 prop
= fdt_getprop(blob
, off
, "label", NULL
);
754 * Could not find label property, nand {}; node?
755 * Check subnode, delete partitions there if any.
757 return fdt_del_partitions(blob
, off
);
759 ret
= fdt_del_subnodes(blob
, parent_offset
);
761 printf("Can't remove subnodes: %s\n",
770 int fdt_node_set_part_info(void *blob
, int parent_offset
,
771 struct mtd_device
*dev
)
773 struct list_head
*pentry
;
774 struct part_info
*part
;
775 struct reg_cell cell
;
780 ret
= fdt_del_partitions(blob
, parent_offset
);
785 * Check if it is nand {}; subnode, adjust
786 * the offset in this case
788 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
789 if (off
> 0 && ndepth
== 1)
793 list_for_each_prev(pentry
, &dev
->parts
) {
796 part
= list_entry(pentry
, struct part_info
, link
);
798 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
799 part_num
, part
->name
, part
->size
,
800 part
->offset
, part
->mask_flags
);
802 sprintf(buf
, "partition@%llx", part
->offset
);
804 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
805 if (ret
== -FDT_ERR_NOSPACE
) {
806 ret
= fdt_increase_size(blob
, 512);
811 } else if (ret
< 0) {
812 printf("Can't add partition node: %s\n",
818 /* Check MTD_WRITEABLE_CMD flag */
819 if (part
->mask_flags
& 1) {
821 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
822 if (ret
== -FDT_ERR_NOSPACE
) {
823 ret
= fdt_increase_size(blob
, 512);
832 cell
.r0
= cpu_to_fdt32(part
->offset
);
833 cell
.r1
= cpu_to_fdt32(part
->size
);
835 ret
= fdt_setprop(blob
, newoff
, "reg", &cell
, sizeof(cell
));
836 if (ret
== -FDT_ERR_NOSPACE
) {
837 ret
= fdt_increase_size(blob
, 512);
846 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
847 if (ret
== -FDT_ERR_NOSPACE
) {
848 ret
= fdt_increase_size(blob
, 512);
860 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
863 printf("Can't add property: %s\n", fdt_strerror(ret
));
868 * Update partitions in nor/nand nodes using info from
869 * mtdparts environment variable. The nodes to update are
870 * specified by node_info structure which contains mtd device
871 * type and compatible string: E. g. the board code in
872 * ft_board_setup() could use:
874 * struct node_info nodes[] = {
875 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
876 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
879 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
881 void fdt_fixup_mtdparts(void *blob
, void *node_info
, int node_info_size
)
883 struct node_info
*ni
= node_info
;
884 struct mtd_device
*dev
;
889 parts
= getenv("mtdparts");
893 if (mtdparts_init() != 0)
896 for (i
= 0; i
< node_info_size
; i
++) {
898 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
899 while (noff
!= -FDT_ERR_NOTFOUND
) {
900 debug("%s: %s, mtd dev type %d\n",
901 fdt_get_name(blob
, noff
, 0),
902 ni
[i
].compat
, ni
[i
].type
);
903 dev
= device_find(ni
[i
].type
, idx
++);
905 if (fdt_node_set_part_info(blob
, noff
, dev
))
906 return; /* return on error */
909 /* Jump to next flash node */
910 noff
= fdt_node_offset_by_compatible(blob
, noff
,
917 void fdt_del_node_and_alias(void *blob
, const char *alias
)
919 int off
= fdt_path_offset(blob
, alias
);
924 fdt_del_node(blob
, off
);
926 off
= fdt_path_offset(blob
, "/aliases");
927 fdt_delprop(blob
, off
, alias
);
930 /* Helper to read a big number; size is in cells (not bytes) */
931 static inline u64
of_read_number(const fdt32_t
*cell
, int size
)
935 r
= (r
<< 32) | fdt32_to_cpu(*(cell
++));
941 /* Max address size we deal with */
942 #define OF_MAX_ADDR_CELLS 4
943 #define OF_BAD_ADDR ((u64)-1)
944 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
949 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
953 printf(" %08x", *(addr
++));
957 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
960 /* Callbacks for bus specific translators */
963 const char *addresses
;
964 void (*count_cells
)(void *blob
, int parentoffset
,
965 int *addrc
, int *sizec
);
966 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
967 int na
, int ns
, int pna
);
968 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
971 /* Default translator (generic bus) */
972 static void of_bus_default_count_cells(void *blob
, int parentoffset
,
973 int *addrc
, int *sizec
)
978 prop
= fdt_getprop(blob
, parentoffset
, "#address-cells", NULL
);
980 *addrc
= be32_to_cpup(prop
);
986 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
988 *sizec
= be32_to_cpup(prop
);
994 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
995 int na
, int ns
, int pna
)
999 cp
= of_read_number(range
, na
);
1000 s
= of_read_number(range
+ na
+ pna
, ns
);
1001 da
= of_read_number(addr
, na
);
1003 debug("OF: default map, cp="PRu64
", s="PRu64
", da="PRu64
"\n",
1006 if (da
< cp
|| da
>= (cp
+ s
))
1011 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
1013 u64 a
= of_read_number(addr
, na
);
1014 memset(addr
, 0, na
* 4);
1017 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
1018 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
1023 /* Array of bus specific translators */
1024 static struct of_bus of_busses
[] = {
1029 .count_cells
= of_bus_default_count_cells
,
1030 .map
= of_bus_default_map
,
1031 .translate
= of_bus_default_translate
,
1035 static int of_translate_one(void * blob
, int parent
, struct of_bus
*bus
,
1036 struct of_bus
*pbus
, fdt32_t
*addr
,
1037 int na
, int ns
, int pna
, const char *rprop
)
1039 const fdt32_t
*ranges
;
1042 u64 offset
= OF_BAD_ADDR
;
1044 /* Normally, an absence of a "ranges" property means we are
1045 * crossing a non-translatable boundary, and thus the addresses
1046 * below the current not cannot be converted to CPU physical ones.
1047 * Unfortunately, while this is very clear in the spec, it's not
1048 * what Apple understood, and they do have things like /uni-n or
1049 * /ht nodes with no "ranges" property and a lot of perfectly
1050 * useable mapped devices below them. Thus we treat the absence of
1051 * "ranges" as equivalent to an empty "ranges" property which means
1052 * a 1:1 translation at that level. It's up to the caller not to try
1053 * to translate addresses that aren't supposed to be translated in
1054 * the first place. --BenH.
1056 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1057 if (ranges
== NULL
|| rlen
== 0) {
1058 offset
= of_read_number(addr
, na
);
1059 memset(addr
, 0, pna
* 4);
1060 debug("OF: no ranges, 1:1 translation\n");
1064 debug("OF: walking ranges...\n");
1066 /* Now walk through the ranges */
1068 rone
= na
+ pna
+ ns
;
1069 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1070 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1071 if (offset
!= OF_BAD_ADDR
)
1074 if (offset
== OF_BAD_ADDR
) {
1075 debug("OF: not found !\n");
1078 memcpy(addr
, ranges
+ na
, 4 * pna
);
1081 of_dump_addr("OF: parent translation for:", addr
, pna
);
1082 debug("OF: with offset: "PRu64
"\n", offset
);
1084 /* Translate it into parent bus space */
1085 return pbus
->translate(addr
, offset
, pna
);
1089 * Translate an address from the device-tree into a CPU physical address,
1090 * this walks up the tree and applies the various bus mappings on the
1093 * Note: We consider that crossing any level with #size-cells == 0 to mean
1094 * that translation is impossible (that is we are not dealing with a value
1095 * that can be mapped to a cpu physical address). This is not really specified
1096 * that way, but this is traditionally the way IBM at least do things
1098 static u64
__of_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
,
1102 struct of_bus
*bus
, *pbus
;
1103 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1104 int na
, ns
, pna
, pns
;
1105 u64 result
= OF_BAD_ADDR
;
1107 debug("OF: ** translation for device %s **\n",
1108 fdt_get_name(blob
, node_offset
, NULL
));
1110 /* Get parent & match bus type */
1111 parent
= fdt_parent_offset(blob
, node_offset
);
1114 bus
= &of_busses
[0];
1116 /* Cound address cells & copy address locally */
1117 bus
->count_cells(blob
, parent
, &na
, &ns
);
1118 if (!OF_CHECK_COUNTS(na
, ns
)) {
1119 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1120 fdt_get_name(blob
, node_offset
, NULL
));
1123 memcpy(addr
, in_addr
, na
* 4);
1125 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1126 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1127 of_dump_addr("OF: translating address:", addr
, na
);
1131 /* Switch to parent bus */
1132 node_offset
= parent
;
1133 parent
= fdt_parent_offset(blob
, node_offset
);
1135 /* If root, we have finished */
1137 debug("OF: reached root node\n");
1138 result
= of_read_number(addr
, na
);
1142 /* Get new parent bus and counts */
1143 pbus
= &of_busses
[0];
1144 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1145 if (!OF_CHECK_COUNTS(pna
, pns
)) {
1146 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1147 fdt_get_name(blob
, node_offset
, NULL
));
1151 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1152 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1154 /* Apply bus translation */
1155 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1156 addr
, na
, ns
, pna
, rprop
))
1159 /* Complete the move up one level */
1164 of_dump_addr("OF: one level translation:", addr
, na
);
1171 u64
fdt_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
)
1173 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1177 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1178 * who's reg property matches a physical cpu address
1180 * @blob: ptr to device tree
1181 * @compat: compatiable string to match
1182 * @compat_off: property name
1185 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1186 phys_addr_t compat_off
)
1188 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1189 while (off
!= -FDT_ERR_NOTFOUND
) {
1190 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1192 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1195 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1198 return -FDT_ERR_NOTFOUND
;
1202 * fdt_alloc_phandle: Return next free phandle value
1204 * @blob: ptr to device tree
1206 int fdt_alloc_phandle(void *blob
)
1208 int offset
, phandle
= 0;
1210 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1211 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1212 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1219 * fdt_set_phandle: Create a phandle property for the given node
1221 * @fdt: ptr to device tree
1222 * @nodeoffset: node to update
1223 * @phandle: phandle value to set (must be unique)
1225 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1230 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1232 if ((off
>= 0) && (off
!= nodeoffset
)) {
1235 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1236 printf("Trying to update node %s with phandle %u ",
1239 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1240 printf("that already exists in node %s.\n", buf
);
1241 return -FDT_ERR_BADPHANDLE
;
1245 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1250 * For now, also set the deprecated "linux,phandle" property, so that we
1251 * don't break older kernels.
1253 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1259 * fdt_create_phandle: Create a phandle property for the given node
1261 * @fdt: ptr to device tree
1262 * @nodeoffset: node to update
1264 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1266 /* see if there is a phandle already */
1267 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1269 /* if we got 0, means no phandle so create one */
1273 phandle
= fdt_alloc_phandle(fdt
);
1274 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1276 printf("Can't set phandle %u: %s\n", phandle
,
1286 * fdt_set_node_status: Set status for the given node
1288 * @fdt: ptr to device tree
1289 * @nodeoffset: node to update
1290 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1291 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1292 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1294 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1295 enum fdt_status status
, unsigned int error_code
)
1304 case FDT_STATUS_OKAY
:
1305 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1307 case FDT_STATUS_DISABLED
:
1308 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1310 case FDT_STATUS_FAIL
:
1311 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1313 case FDT_STATUS_FAIL_ERROR_CODE
:
1314 sprintf(buf
, "fail-%d", error_code
);
1315 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1318 printf("Invalid fdt status: %x\n", status
);
1327 * fdt_set_status_by_alias: Set status for the given node given an alias
1329 * @fdt: ptr to device tree
1330 * @alias: alias of node to update
1331 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1332 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1333 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1335 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1336 enum fdt_status status
, unsigned int error_code
)
1338 int offset
= fdt_path_offset(fdt
, alias
);
1340 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1343 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1344 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1349 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1350 if (noff
!= -FDT_ERR_NOTFOUND
) {
1351 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1353 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1354 if (ret
== -FDT_ERR_NOSPACE
) {
1355 ret
= fdt_increase_size(blob
, 512);
1360 } else if (ret
< 0) {
1361 printf("Can't add property: %s\n", fdt_strerror(ret
));
1367 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1373 * Verify the physical address of device tree node for a given alias
1375 * This function locates the device tree node of a given alias, and then
1376 * verifies that the physical address of that device matches the given
1377 * parameter. It displays a message if there is a mismatch.
1379 * Returns 1 on success, 0 on failure
1381 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1388 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1390 /* If there's no such alias, then it's not a failure */
1394 node
= fdt_path_offset(fdt
, path
);
1396 printf("Warning: device tree alias '%s' points to invalid "
1397 "node %s.\n", alias
, path
);
1401 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1403 printf("Warning: device tree node '%s' has no address.\n",
1408 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1409 if (addr
!= dt_addr
) {
1410 printf("Warning: U-Boot configured device %s at address %llx,\n"
1411 " but the device tree has it address %llx.\n",
1412 alias
, addr
, dt_addr
);
1420 * Returns the base address of an SOC or PCI node
1422 u64
fdt_get_base_address(void *fdt
, int node
)
1426 const fdt32_t
*prop
;
1428 prop
= fdt_getprop(fdt
, node
, "#address-cells", &size
);
1429 if (prop
&& size
== 4)
1430 naddr
= be32_to_cpup(prop
);
1434 prop
= fdt_getprop(fdt
, node
, "ranges", &size
);
1436 return prop
? fdt_translate_address(fdt
, node
, prop
+ naddr
) : 0;
1440 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1442 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1443 uint64_t *val
, int cells
)
1445 const fdt32_t
*prop32
= &prop
[cell_off
];
1446 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1448 if ((cell_off
+ cells
) > prop_len
)
1449 return -FDT_ERR_NOSPACE
;
1453 *val
= fdt32_to_cpu(*prop32
);
1456 *val
= fdt64_to_cpu(*prop64
);
1459 return -FDT_ERR_NOSPACE
;
1466 * fdt_read_range - Read a node's n'th range property
1468 * @fdt: ptr to device tree
1469 * @node: offset of node
1471 * @child_addr: pointer to storage for the "child address" field
1472 * @addr: pointer to storage for the CPU view translated physical start
1473 * @len: pointer to storage for the range length
1475 * Convenience function that reads and interprets a specific range out of
1476 * a number of the "ranges" property array.
1478 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1479 uint64_t *addr
, uint64_t *len
)
1481 int pnode
= fdt_parent_offset(fdt
, node
);
1482 const fdt32_t
*ranges
;
1491 * The "ranges" property is an array of
1492 * { <child address> <parent address> <size in child address space> }
1494 * All 3 elements can span a diffent number of cells. Fetch their size.
1496 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1497 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1498 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1500 /* Now try to get the ranges property */
1501 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1503 return -FDT_ERR_NOTFOUND
;
1504 ranges_len
/= sizeof(uint32_t);
1506 /* Jump to the n'th entry */
1507 cell
= n
* (pacells
+ acells
+ scells
);
1509 /* Read <child address> */
1511 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1518 /* Read <parent address> */
1520 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1523 /* Read <size in child address space> */
1525 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);