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 * fdt_getprop_u32_default_node - Return a node's property or a default
22 * @fdt: ptr to device tree
23 * @off: offset of node
24 * @cell: cell offset in property
25 * @prop: property name
26 * @dflt: default value if the property isn't found
28 * Convenience function to return a node's property or a default value if
29 * the property doesn't exist.
31 u32
fdt_getprop_u32_default_node(const void *fdt
, int off
, int cell
,
32 const char *prop
, const u32 dflt
)
37 val
= fdt_getprop(fdt
, off
, prop
, &len
);
39 /* Check if property exists */
43 /* Check if property is long enough */
44 if (len
< ((cell
+ 1) * sizeof(uint32_t)))
47 return fdt32_to_cpu(*val
);
51 * fdt_getprop_u32_default - Find a node and return it's property or a default
53 * @fdt: ptr to device tree
55 * @prop: property name
56 * @dflt: default value if the property isn't found
58 * Convenience function to find a node and return it's property or a
59 * default value if it doesn't exist.
61 u32
fdt_getprop_u32_default(const void *fdt
, const char *path
,
62 const char *prop
, const u32 dflt
)
66 off
= fdt_path_offset(fdt
, path
);
70 return fdt_getprop_u32_default_node(fdt
, off
, 0, prop
, dflt
);
74 * fdt_find_and_setprop: Find a node and set it's property
76 * @fdt: ptr to device tree
78 * @prop: property name
79 * @val: ptr to new value
80 * @len: length of new property value
81 * @create: flag to create the property if it doesn't exist
83 * Convenience function to directly set a property given the path to the node.
85 int fdt_find_and_setprop(void *fdt
, const char *node
, const char *prop
,
86 const void *val
, int len
, int create
)
88 int nodeoff
= fdt_path_offset(fdt
, node
);
93 if ((!create
) && (fdt_get_property(fdt
, nodeoff
, prop
, NULL
) == NULL
))
94 return 0; /* create flag not set; so exit quietly */
96 return fdt_setprop(fdt
, nodeoff
, prop
, val
, len
);
100 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
102 * @fdt: pointer to the device tree blob
103 * @parentoffset: structure block offset of a node
104 * @name: name of the subnode to locate
106 * fdt_subnode_offset() finds a subnode of the node with a given name.
107 * If the subnode does not exist, it will be created.
109 int fdt_find_or_add_subnode(void *fdt
, int parentoffset
, const char *name
)
113 offset
= fdt_subnode_offset(fdt
, parentoffset
, name
);
115 if (offset
== -FDT_ERR_NOTFOUND
)
116 offset
= fdt_add_subnode(fdt
, parentoffset
, name
);
119 printf("%s: %s: %s\n", __func__
, name
, fdt_strerror(offset
));
124 /* rename to CONFIG_OF_STDOUT_PATH ? */
125 #if defined(OF_STDOUT_PATH)
126 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
128 return fdt_setprop(fdt
, chosenoff
, "linux,stdout-path",
129 OF_STDOUT_PATH
, strlen(OF_STDOUT_PATH
) + 1);
131 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
132 static void fdt_fill_multisername(char *sername
, size_t maxlen
)
134 const char *outname
= stdio_devices
[stdout
]->name
;
136 if (strcmp(outname
, "serial") > 0)
137 strncpy(sername
, outname
, maxlen
);
140 if (strcmp(outname
+ 1, "serial") > 0)
141 strncpy(sername
, outname
+ 1, maxlen
);
144 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
148 char sername
[9] = { 0 };
151 char tmp
[256]; /* long enough */
153 fdt_fill_multisername(sername
, sizeof(sername
) - 1);
155 sprintf(sername
, "serial%d", CONFIG_CONS_INDEX
- 1);
157 aliasoff
= fdt_path_offset(fdt
, "/aliases");
163 path
= fdt_getprop(fdt
, aliasoff
, sername
, &len
);
169 /* fdt_setprop may break "path" so we copy it to tmp buffer */
170 memcpy(tmp
, path
, len
);
172 err
= fdt_setprop(fdt
, chosenoff
, "linux,stdout-path", tmp
, len
);
175 printf("WARNING: could not set linux,stdout-path %s.\n",
181 static int fdt_fixup_stdout(void *fdt
, int chosenoff
)
187 static inline int fdt_setprop_uxx(void *fdt
, int nodeoffset
, const char *name
,
188 uint64_t val
, int is_u64
)
191 return fdt_setprop_u64(fdt
, nodeoffset
, name
, val
);
193 return fdt_setprop_u32(fdt
, nodeoffset
, name
, (uint32_t)val
);
197 int fdt_initrd(void *fdt
, ulong initrd_start
, ulong initrd_end
)
204 /* just return if the size of initrd is zero */
205 if (initrd_start
== initrd_end
)
208 /* find or create "/chosen" node. */
209 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
213 total
= fdt_num_mem_rsv(fdt
);
216 * Look for an existing entry and update it. If we don't find
217 * the entry, we will j be the next available slot.
219 for (j
= 0; j
< total
; j
++) {
220 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
221 if (addr
== initrd_start
) {
222 fdt_del_mem_rsv(fdt
, j
);
227 err
= fdt_add_mem_rsv(fdt
, initrd_start
, initrd_end
- initrd_start
);
229 printf("fdt_initrd: %s\n", fdt_strerror(err
));
233 is_u64
= (fdt_address_cells(fdt
, 0) == 2);
235 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-start",
236 (uint64_t)initrd_start
, is_u64
);
239 printf("WARNING: could not set linux,initrd-start %s.\n",
244 err
= fdt_setprop_uxx(fdt
, nodeoffset
, "linux,initrd-end",
245 (uint64_t)initrd_end
, is_u64
);
248 printf("WARNING: could not set linux,initrd-end %s.\n",
257 int fdt_chosen(void *fdt
)
261 char *str
; /* used to set string properties */
263 err
= fdt_check_header(fdt
);
265 printf("fdt_chosen: %s\n", fdt_strerror(err
));
269 /* find or create "/chosen" node. */
270 nodeoffset
= fdt_find_or_add_subnode(fdt
, 0, "chosen");
274 str
= getenv("bootargs");
276 err
= fdt_setprop(fdt
, nodeoffset
, "bootargs", str
,
279 printf("WARNING: could not set bootargs %s.\n",
285 return fdt_fixup_stdout(fdt
, nodeoffset
);
288 void do_fixup_by_path(void *fdt
, const char *path
, const char *prop
,
289 const void *val
, int len
, int create
)
293 debug("Updating property '%s/%s' = ", path
, prop
);
294 for (i
= 0; i
< len
; i
++)
295 debug(" %.2x", *(u8
*)(val
+i
));
298 int rc
= fdt_find_and_setprop(fdt
, path
, prop
, val
, len
, create
);
300 printf("Unable to update property %s:%s, err=%s\n",
301 path
, prop
, fdt_strerror(rc
));
304 void do_fixup_by_path_u32(void *fdt
, const char *path
, const char *prop
,
307 fdt32_t tmp
= cpu_to_fdt32(val
);
308 do_fixup_by_path(fdt
, path
, prop
, &tmp
, sizeof(tmp
), create
);
311 void do_fixup_by_prop(void *fdt
,
312 const char *pname
, const void *pval
, int plen
,
313 const char *prop
, const void *val
, int len
,
319 debug("Updating property '%s' = ", prop
);
320 for (i
= 0; i
< len
; i
++)
321 debug(" %.2x", *(u8
*)(val
+i
));
324 off
= fdt_node_offset_by_prop_value(fdt
, -1, pname
, pval
, plen
);
325 while (off
!= -FDT_ERR_NOTFOUND
) {
326 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
327 fdt_setprop(fdt
, off
, prop
, val
, len
);
328 off
= fdt_node_offset_by_prop_value(fdt
, off
, pname
, pval
, plen
);
332 void do_fixup_by_prop_u32(void *fdt
,
333 const char *pname
, const void *pval
, int plen
,
334 const char *prop
, u32 val
, int create
)
336 fdt32_t tmp
= cpu_to_fdt32(val
);
337 do_fixup_by_prop(fdt
, pname
, pval
, plen
, prop
, &tmp
, 4, create
);
340 void do_fixup_by_compat(void *fdt
, const char *compat
,
341 const char *prop
, const void *val
, int len
, int create
)
346 debug("Updating property '%s' = ", prop
);
347 for (i
= 0; i
< len
; i
++)
348 debug(" %.2x", *(u8
*)(val
+i
));
351 off
= fdt_node_offset_by_compatible(fdt
, -1, compat
);
352 while (off
!= -FDT_ERR_NOTFOUND
) {
353 if (create
|| (fdt_get_property(fdt
, off
, prop
, NULL
) != NULL
))
354 fdt_setprop(fdt
, off
, prop
, val
, len
);
355 off
= fdt_node_offset_by_compatible(fdt
, off
, compat
);
359 void do_fixup_by_compat_u32(void *fdt
, const char *compat
,
360 const char *prop
, u32 val
, int create
)
362 fdt32_t tmp
= cpu_to_fdt32(val
);
363 do_fixup_by_compat(fdt
, compat
, prop
, &tmp
, 4, create
);
367 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
369 static int fdt_pack_reg(const void *fdt
, void *buf
, u64
*address
, u64
*size
,
373 int address_len
= fdt_address_cells(fdt
, 0);
374 int size_len
= fdt_size_cells(fdt
, 0);
377 for (i
= 0; i
< n
; i
++) {
378 if (address_len
== 2)
379 *(fdt64_t
*)p
= cpu_to_fdt64(address
[i
]);
381 *(fdt32_t
*)p
= cpu_to_fdt32(address
[i
]);
385 *(fdt64_t
*)p
= cpu_to_fdt64(size
[i
]);
387 *(fdt32_t
*)p
= cpu_to_fdt32(size
[i
]);
391 return p
- (char *)buf
;
394 #ifdef CONFIG_NR_DRAM_BANKS
395 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
397 #define MEMORY_BANKS_MAX 4
399 int fdt_fixup_memory_banks(void *blob
, u64 start
[], u64 size
[], int banks
)
403 u8 tmp
[MEMORY_BANKS_MAX
* 16]; /* Up to 64-bit address + 64-bit size */
405 if (banks
> MEMORY_BANKS_MAX
) {
406 printf("%s: num banks %d exceeds hardcoded limit %d."
407 " Recompile with higher MEMORY_BANKS_MAX?\n",
408 __FUNCTION__
, banks
, MEMORY_BANKS_MAX
);
412 err
= fdt_check_header(blob
);
414 printf("%s: %s\n", __FUNCTION__
, fdt_strerror(err
));
418 /* find or create "/memory" node. */
419 nodeoffset
= fdt_find_or_add_subnode(blob
, 0, "memory");
423 err
= fdt_setprop(blob
, nodeoffset
, "device_type", "memory",
426 printf("WARNING: could not set %s %s.\n", "device_type",
431 len
= fdt_pack_reg(blob
, tmp
, start
, size
, banks
);
433 err
= fdt_setprop(blob
, nodeoffset
, "reg", tmp
, len
);
435 printf("WARNING: could not set %s %s.\n",
436 "reg", fdt_strerror(err
));
442 int fdt_fixup_memory(void *blob
, u64 start
, u64 size
)
444 return fdt_fixup_memory_banks(blob
, &start
, &size
, 1);
447 void fdt_fixup_ethernet(void *fdt
)
450 char enet
[16], *tmp
, *end
;
453 unsigned char mac_addr
[6];
455 node
= fdt_path_offset(fdt
, "/aliases");
459 if (!getenv("ethaddr")) {
460 if (getenv("usbethaddr")) {
461 strcpy(mac
, "usbethaddr");
463 debug("No ethernet MAC Address defined\n");
467 strcpy(mac
, "ethaddr");
471 while ((tmp
= getenv(mac
)) != NULL
) {
472 sprintf(enet
, "ethernet%d", i
);
473 path
= fdt_getprop(fdt
, node
, enet
, NULL
);
475 debug("No alias for %s\n", enet
);
476 sprintf(mac
, "eth%daddr", ++i
);
480 for (j
= 0; j
< 6; j
++) {
481 mac_addr
[j
] = tmp
? simple_strtoul(tmp
, &end
, 16) : 0;
483 tmp
= (*end
) ? end
+1 : end
;
486 do_fixup_by_path(fdt
, path
, "mac-address", &mac_addr
, 6, 0);
487 do_fixup_by_path(fdt
, path
, "local-mac-address",
490 sprintf(mac
, "eth%daddr", ++i
);
494 /* Resize the fdt to its actual size + a bit of padding */
495 int fdt_shrink_to_minimum(void *blob
)
505 total
= fdt_num_mem_rsv(blob
);
506 for (i
= 0; i
< total
; i
++) {
507 fdt_get_mem_rsv(blob
, i
, &addr
, &size
);
508 if (addr
== (uintptr_t)blob
) {
509 fdt_del_mem_rsv(blob
, i
);
515 * Calculate the actual size of the fdt
516 * plus the size needed for 5 fdt_add_mem_rsv, one
517 * for the fdt itself and 4 for a possible initrd
518 * ((initrd-start + initrd-end) * 2 (name & value))
520 actualsize
= fdt_off_dt_strings(blob
) +
521 fdt_size_dt_strings(blob
) + 5 * sizeof(struct fdt_reserve_entry
);
523 /* Make it so the fdt ends on a page boundary */
524 actualsize
= ALIGN(actualsize
+ ((uintptr_t)blob
& 0xfff), 0x1000);
525 actualsize
= actualsize
- ((uintptr_t)blob
& 0xfff);
527 /* Change the fdt header to reflect the correct size */
528 fdt_set_totalsize(blob
, actualsize
);
530 /* Add the new reservation */
531 ret
= fdt_add_mem_rsv(blob
, (uintptr_t)blob
, actualsize
);
539 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
541 #define FDT_PCI_PREFETCH (0x40000000)
542 #define FDT_PCI_MEM32 (0x02000000)
543 #define FDT_PCI_IO (0x01000000)
544 #define FDT_PCI_MEM64 (0x03000000)
546 int fdt_pci_dma_ranges(void *blob
, int phb_off
, struct pci_controller
*hose
) {
548 int addrcell
, sizecell
, len
, r
;
550 /* sized based on pci addr cells, size-cells, & address-cells */
551 u32 dma_ranges
[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN
];
553 addrcell
= fdt_getprop_u32_default(blob
, "/", "#address-cells", 1);
554 sizecell
= fdt_getprop_u32_default(blob
, "/", "#size-cells", 1);
556 dma_range
= &dma_ranges
[0];
557 for (r
= 0; r
< hose
->region_count
; r
++) {
558 u64 bus_start
, phys_start
, size
;
560 /* skip if !PCI_REGION_SYS_MEMORY */
561 if (!(hose
->regions
[r
].flags
& PCI_REGION_SYS_MEMORY
))
564 bus_start
= (u64
)hose
->regions
[r
].bus_start
;
565 phys_start
= (u64
)hose
->regions
[r
].phys_start
;
566 size
= (u64
)hose
->regions
[r
].size
;
569 if (size
>= 0x100000000ull
)
570 dma_range
[0] |= FDT_PCI_MEM64
;
572 dma_range
[0] |= FDT_PCI_MEM32
;
573 if (hose
->regions
[r
].flags
& PCI_REGION_PREFETCH
)
574 dma_range
[0] |= FDT_PCI_PREFETCH
;
575 #ifdef CONFIG_SYS_PCI_64BIT
576 dma_range
[1] = bus_start
>> 32;
580 dma_range
[2] = bus_start
& 0xffffffff;
583 dma_range
[3] = phys_start
>> 32;
584 dma_range
[4] = phys_start
& 0xffffffff;
586 dma_range
[3] = phys_start
& 0xffffffff;
590 dma_range
[3 + addrcell
+ 0] = size
>> 32;
591 dma_range
[3 + addrcell
+ 1] = size
& 0xffffffff;
593 dma_range
[3 + addrcell
+ 0] = size
& 0xffffffff;
596 dma_range
+= (3 + addrcell
+ sizecell
);
599 len
= dma_range
- &dma_ranges
[0];
601 fdt_setprop(blob
, phb_off
, "dma-ranges", &dma_ranges
[0], len
*4);
607 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
609 * Provide a weak default function to return the flash bank size.
610 * There might be multiple non-identical flash chips connected to one
611 * chip-select, so we need to pass an index as well.
613 u32
__flash_get_bank_size(int cs
, int idx
)
615 extern flash_info_t flash_info
[];
618 * As default, a simple 1:1 mapping is provided. Boards with
619 * a different mapping need to supply a board specific mapping
622 return flash_info
[cs
].size
;
624 u32
flash_get_bank_size(int cs
, int idx
)
625 __attribute__((weak
, alias("__flash_get_bank_size")));
628 * This function can be used to update the size in the "reg" property
629 * of all NOR FLASH device nodes. This is necessary for boards with
630 * non-fixed NOR FLASH sizes.
632 int fdt_fixup_nor_flash_size(void *blob
)
634 char compat
[][16] = { "cfi-flash", "jedec-flash" };
637 struct fdt_property
*prop
;
641 for (i
= 0; i
< 2; i
++) {
642 off
= fdt_node_offset_by_compatible(blob
, -1, compat
[i
]);
643 while (off
!= -FDT_ERR_NOTFOUND
) {
647 * Found one compatible node, so fixup the size
648 * int its reg properties
650 prop
= fdt_get_property_w(blob
, off
, "reg", &len
);
652 int tuple_size
= 3 * sizeof(reg
);
655 * There might be multiple reg-tuples,
656 * so loop through them all
658 reg
= reg2
= (u32
*)&prop
->data
[0];
659 for (idx
= 0; idx
< (len
/ tuple_size
); idx
++) {
661 * Update size in reg property
663 reg
[2] = flash_get_bank_size(reg
[0],
667 * Point to next reg tuple
672 fdt_setprop(blob
, off
, "reg", reg2
, len
);
675 /* Move to next compatible node */
676 off
= fdt_node_offset_by_compatible(blob
, off
,
685 int fdt_increase_size(void *fdt
, int add_len
)
689 newlen
= fdt_totalsize(fdt
) + add_len
;
691 /* Open in place with a new len */
692 return fdt_open_into(fdt
, fdt
, newlen
);
695 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
696 #include <jffs2/load_kernel.h>
697 #include <mtd_node.h>
704 int fdt_del_subnodes(const void *blob
, int parent_offset
)
709 for (ndepth
= 0, off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
710 (off
>= 0) && (ndepth
> 0);
711 off
= fdt_next_node(blob
, off
, &ndepth
)) {
713 debug("delete %s: offset: %x\n",
714 fdt_get_name(blob
, off
, 0), off
);
715 ret
= fdt_del_node((void *)blob
, off
);
717 printf("Can't delete node: %s\n",
729 int fdt_del_partitions(void *blob
, int parent_offset
)
736 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
737 if (off
> 0 && ndepth
== 1) {
738 prop
= fdt_getprop(blob
, off
, "label", NULL
);
741 * Could not find label property, nand {}; node?
742 * Check subnode, delete partitions there if any.
744 return fdt_del_partitions(blob
, off
);
746 ret
= fdt_del_subnodes(blob
, parent_offset
);
748 printf("Can't remove subnodes: %s\n",
757 int fdt_node_set_part_info(void *blob
, int parent_offset
,
758 struct mtd_device
*dev
)
760 struct list_head
*pentry
;
761 struct part_info
*part
;
762 struct reg_cell cell
;
767 ret
= fdt_del_partitions(blob
, parent_offset
);
772 * Check if it is nand {}; subnode, adjust
773 * the offset in this case
775 off
= fdt_next_node(blob
, parent_offset
, &ndepth
);
776 if (off
> 0 && ndepth
== 1)
780 list_for_each_prev(pentry
, &dev
->parts
) {
783 part
= list_entry(pentry
, struct part_info
, link
);
785 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
786 part_num
, part
->name
, part
->size
,
787 part
->offset
, part
->mask_flags
);
789 sprintf(buf
, "partition@%llx", part
->offset
);
791 ret
= fdt_add_subnode(blob
, parent_offset
, buf
);
792 if (ret
== -FDT_ERR_NOSPACE
) {
793 ret
= fdt_increase_size(blob
, 512);
798 } else if (ret
< 0) {
799 printf("Can't add partition node: %s\n",
805 /* Check MTD_WRITEABLE_CMD flag */
806 if (part
->mask_flags
& 1) {
808 ret
= fdt_setprop(blob
, newoff
, "read_only", NULL
, 0);
809 if (ret
== -FDT_ERR_NOSPACE
) {
810 ret
= fdt_increase_size(blob
, 512);
819 cell
.r0
= cpu_to_fdt32(part
->offset
);
820 cell
.r1
= cpu_to_fdt32(part
->size
);
822 ret
= fdt_setprop(blob
, newoff
, "reg", &cell
, sizeof(cell
));
823 if (ret
== -FDT_ERR_NOSPACE
) {
824 ret
= fdt_increase_size(blob
, 512);
833 ret
= fdt_setprop_string(blob
, newoff
, "label", part
->name
);
834 if (ret
== -FDT_ERR_NOSPACE
) {
835 ret
= fdt_increase_size(blob
, 512);
847 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
850 printf("Can't add property: %s\n", fdt_strerror(ret
));
855 * Update partitions in nor/nand nodes using info from
856 * mtdparts environment variable. The nodes to update are
857 * specified by node_info structure which contains mtd device
858 * type and compatible string: E. g. the board code in
859 * ft_board_setup() could use:
861 * struct node_info nodes[] = {
862 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
863 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
866 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
868 void fdt_fixup_mtdparts(void *blob
, void *node_info
, int node_info_size
)
870 struct node_info
*ni
= node_info
;
871 struct mtd_device
*dev
;
876 parts
= getenv("mtdparts");
880 if (mtdparts_init() != 0)
883 for (i
= 0; i
< node_info_size
; i
++) {
885 noff
= fdt_node_offset_by_compatible(blob
, -1, ni
[i
].compat
);
886 while (noff
!= -FDT_ERR_NOTFOUND
) {
887 debug("%s: %s, mtd dev type %d\n",
888 fdt_get_name(blob
, noff
, 0),
889 ni
[i
].compat
, ni
[i
].type
);
890 dev
= device_find(ni
[i
].type
, idx
++);
892 if (fdt_node_set_part_info(blob
, noff
, dev
))
893 return; /* return on error */
896 /* Jump to next flash node */
897 noff
= fdt_node_offset_by_compatible(blob
, noff
,
904 void fdt_del_node_and_alias(void *blob
, const char *alias
)
906 int off
= fdt_path_offset(blob
, alias
);
911 fdt_del_node(blob
, off
);
913 off
= fdt_path_offset(blob
, "/aliases");
914 fdt_delprop(blob
, off
, alias
);
919 /* Max address size we deal with */
920 #define OF_MAX_ADDR_CELLS 4
921 #define OF_BAD_ADDR ((u64)-1)
922 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
927 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
)
931 printf(" %08x", *(addr
++));
935 static void of_dump_addr(const char *s
, const fdt32_t
*addr
, int na
) { }
938 /* Callbacks for bus specific translators */
941 const char *addresses
;
942 void (*count_cells
)(void *blob
, int parentoffset
,
943 int *addrc
, int *sizec
);
944 u64 (*map
)(fdt32_t
*addr
, const fdt32_t
*range
,
945 int na
, int ns
, int pna
);
946 int (*translate
)(fdt32_t
*addr
, u64 offset
, int na
);
949 /* Default translator (generic bus) */
950 void of_bus_default_count_cells(void *blob
, int parentoffset
,
951 int *addrc
, int *sizec
)
956 *addrc
= fdt_address_cells(blob
, parentoffset
);
959 prop
= fdt_getprop(blob
, parentoffset
, "#size-cells", NULL
);
961 *sizec
= be32_to_cpup(prop
);
967 static u64
of_bus_default_map(fdt32_t
*addr
, const fdt32_t
*range
,
968 int na
, int ns
, int pna
)
972 cp
= of_read_number(range
, na
);
973 s
= of_read_number(range
+ na
+ pna
, ns
);
974 da
= of_read_number(addr
, na
);
976 debug("OF: default map, cp="PRu64
", s="PRu64
", da="PRu64
"\n",
979 if (da
< cp
|| da
>= (cp
+ s
))
984 static int of_bus_default_translate(fdt32_t
*addr
, u64 offset
, int na
)
986 u64 a
= of_read_number(addr
, na
);
987 memset(addr
, 0, na
* 4);
990 addr
[na
- 2] = cpu_to_fdt32(a
>> 32);
991 addr
[na
- 1] = cpu_to_fdt32(a
& 0xffffffffu
);
996 /* Array of bus specific translators */
997 static struct of_bus of_busses
[] = {
1002 .count_cells
= of_bus_default_count_cells
,
1003 .map
= of_bus_default_map
,
1004 .translate
= of_bus_default_translate
,
1008 static int of_translate_one(void * blob
, int parent
, struct of_bus
*bus
,
1009 struct of_bus
*pbus
, fdt32_t
*addr
,
1010 int na
, int ns
, int pna
, const char *rprop
)
1012 const fdt32_t
*ranges
;
1015 u64 offset
= OF_BAD_ADDR
;
1017 /* Normally, an absence of a "ranges" property means we are
1018 * crossing a non-translatable boundary, and thus the addresses
1019 * below the current not cannot be converted to CPU physical ones.
1020 * Unfortunately, while this is very clear in the spec, it's not
1021 * what Apple understood, and they do have things like /uni-n or
1022 * /ht nodes with no "ranges" property and a lot of perfectly
1023 * useable mapped devices below them. Thus we treat the absence of
1024 * "ranges" as equivalent to an empty "ranges" property which means
1025 * a 1:1 translation at that level. It's up to the caller not to try
1026 * to translate addresses that aren't supposed to be translated in
1027 * the first place. --BenH.
1029 ranges
= fdt_getprop(blob
, parent
, rprop
, &rlen
);
1030 if (ranges
== NULL
|| rlen
== 0) {
1031 offset
= of_read_number(addr
, na
);
1032 memset(addr
, 0, pna
* 4);
1033 debug("OF: no ranges, 1:1 translation\n");
1037 debug("OF: walking ranges...\n");
1039 /* Now walk through the ranges */
1041 rone
= na
+ pna
+ ns
;
1042 for (; rlen
>= rone
; rlen
-= rone
, ranges
+= rone
) {
1043 offset
= bus
->map(addr
, ranges
, na
, ns
, pna
);
1044 if (offset
!= OF_BAD_ADDR
)
1047 if (offset
== OF_BAD_ADDR
) {
1048 debug("OF: not found !\n");
1051 memcpy(addr
, ranges
+ na
, 4 * pna
);
1054 of_dump_addr("OF: parent translation for:", addr
, pna
);
1055 debug("OF: with offset: "PRu64
"\n", offset
);
1057 /* Translate it into parent bus space */
1058 return pbus
->translate(addr
, offset
, pna
);
1062 * Translate an address from the device-tree into a CPU physical address,
1063 * this walks up the tree and applies the various bus mappings on the
1066 * Note: We consider that crossing any level with #size-cells == 0 to mean
1067 * that translation is impossible (that is we are not dealing with a value
1068 * that can be mapped to a cpu physical address). This is not really specified
1069 * that way, but this is traditionally the way IBM at least do things
1071 static u64
__of_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
,
1075 struct of_bus
*bus
, *pbus
;
1076 fdt32_t addr
[OF_MAX_ADDR_CELLS
];
1077 int na
, ns
, pna
, pns
;
1078 u64 result
= OF_BAD_ADDR
;
1080 debug("OF: ** translation for device %s **\n",
1081 fdt_get_name(blob
, node_offset
, NULL
));
1083 /* Get parent & match bus type */
1084 parent
= fdt_parent_offset(blob
, node_offset
);
1087 bus
= &of_busses
[0];
1089 /* Cound address cells & copy address locally */
1090 bus
->count_cells(blob
, parent
, &na
, &ns
);
1091 if (!OF_CHECK_COUNTS(na
, ns
)) {
1092 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1093 fdt_get_name(blob
, node_offset
, NULL
));
1096 memcpy(addr
, in_addr
, na
* 4);
1098 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1099 bus
->name
, na
, ns
, fdt_get_name(blob
, parent
, NULL
));
1100 of_dump_addr("OF: translating address:", addr
, na
);
1104 /* Switch to parent bus */
1105 node_offset
= parent
;
1106 parent
= fdt_parent_offset(blob
, node_offset
);
1108 /* If root, we have finished */
1110 debug("OF: reached root node\n");
1111 result
= of_read_number(addr
, na
);
1115 /* Get new parent bus and counts */
1116 pbus
= &of_busses
[0];
1117 pbus
->count_cells(blob
, parent
, &pna
, &pns
);
1118 if (!OF_CHECK_COUNTS(pna
, pns
)) {
1119 printf("%s: Bad cell count for %s\n", __FUNCTION__
,
1120 fdt_get_name(blob
, node_offset
, NULL
));
1124 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1125 pbus
->name
, pna
, pns
, fdt_get_name(blob
, parent
, NULL
));
1127 /* Apply bus translation */
1128 if (of_translate_one(blob
, node_offset
, bus
, pbus
,
1129 addr
, na
, ns
, pna
, rprop
))
1132 /* Complete the move up one level */
1137 of_dump_addr("OF: one level translation:", addr
, na
);
1144 u64
fdt_translate_address(void *blob
, int node_offset
, const fdt32_t
*in_addr
)
1146 return __of_translate_address(blob
, node_offset
, in_addr
, "ranges");
1150 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1151 * who's reg property matches a physical cpu address
1153 * @blob: ptr to device tree
1154 * @compat: compatiable string to match
1155 * @compat_off: property name
1158 int fdt_node_offset_by_compat_reg(void *blob
, const char *compat
,
1159 phys_addr_t compat_off
)
1161 int len
, off
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1162 while (off
!= -FDT_ERR_NOTFOUND
) {
1163 const fdt32_t
*reg
= fdt_getprop(blob
, off
, "reg", &len
);
1165 if (compat_off
== fdt_translate_address(blob
, off
, reg
))
1168 off
= fdt_node_offset_by_compatible(blob
, off
, compat
);
1171 return -FDT_ERR_NOTFOUND
;
1175 * fdt_alloc_phandle: Return next free phandle value
1177 * @blob: ptr to device tree
1179 int fdt_alloc_phandle(void *blob
)
1182 uint32_t phandle
= 0;
1184 for (offset
= fdt_next_node(blob
, -1, NULL
); offset
>= 0;
1185 offset
= fdt_next_node(blob
, offset
, NULL
)) {
1186 phandle
= max(phandle
, fdt_get_phandle(blob
, offset
));
1193 * fdt_set_phandle: Create a phandle property for the given node
1195 * @fdt: ptr to device tree
1196 * @nodeoffset: node to update
1197 * @phandle: phandle value to set (must be unique)
1199 int fdt_set_phandle(void *fdt
, int nodeoffset
, uint32_t phandle
)
1204 int off
= fdt_node_offset_by_phandle(fdt
, phandle
);
1206 if ((off
>= 0) && (off
!= nodeoffset
)) {
1209 fdt_get_path(fdt
, nodeoffset
, buf
, sizeof(buf
));
1210 printf("Trying to update node %s with phandle %u ",
1213 fdt_get_path(fdt
, off
, buf
, sizeof(buf
));
1214 printf("that already exists in node %s.\n", buf
);
1215 return -FDT_ERR_BADPHANDLE
;
1219 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "phandle", phandle
);
1224 * For now, also set the deprecated "linux,phandle" property, so that we
1225 * don't break older kernels.
1227 ret
= fdt_setprop_cell(fdt
, nodeoffset
, "linux,phandle", phandle
);
1233 * fdt_create_phandle: Create a phandle property for the given node
1235 * @fdt: ptr to device tree
1236 * @nodeoffset: node to update
1238 unsigned int fdt_create_phandle(void *fdt
, int nodeoffset
)
1240 /* see if there is a phandle already */
1241 int phandle
= fdt_get_phandle(fdt
, nodeoffset
);
1243 /* if we got 0, means no phandle so create one */
1247 phandle
= fdt_alloc_phandle(fdt
);
1248 ret
= fdt_set_phandle(fdt
, nodeoffset
, phandle
);
1250 printf("Can't set phandle %u: %s\n", phandle
,
1260 * fdt_set_node_status: Set status for the given node
1262 * @fdt: ptr to device tree
1263 * @nodeoffset: node to update
1264 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1265 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1266 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1268 int fdt_set_node_status(void *fdt
, int nodeoffset
,
1269 enum fdt_status status
, unsigned int error_code
)
1278 case FDT_STATUS_OKAY
:
1279 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "okay");
1281 case FDT_STATUS_DISABLED
:
1282 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "disabled");
1284 case FDT_STATUS_FAIL
:
1285 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", "fail");
1287 case FDT_STATUS_FAIL_ERROR_CODE
:
1288 sprintf(buf
, "fail-%d", error_code
);
1289 ret
= fdt_setprop_string(fdt
, nodeoffset
, "status", buf
);
1292 printf("Invalid fdt status: %x\n", status
);
1301 * fdt_set_status_by_alias: Set status for the given node given an alias
1303 * @fdt: ptr to device tree
1304 * @alias: alias of node to update
1305 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1306 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1307 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1309 int fdt_set_status_by_alias(void *fdt
, const char* alias
,
1310 enum fdt_status status
, unsigned int error_code
)
1312 int offset
= fdt_path_offset(fdt
, alias
);
1314 return fdt_set_node_status(fdt
, offset
, status
, error_code
);
1317 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1318 int fdt_add_edid(void *blob
, const char *compat
, unsigned char *edid_buf
)
1323 noff
= fdt_node_offset_by_compatible(blob
, -1, compat
);
1324 if (noff
!= -FDT_ERR_NOTFOUND
) {
1325 debug("%s: %s\n", fdt_get_name(blob
, noff
, 0), compat
);
1327 ret
= fdt_setprop(blob
, noff
, "edid", edid_buf
, 128);
1328 if (ret
== -FDT_ERR_NOSPACE
) {
1329 ret
= fdt_increase_size(blob
, 512);
1334 } else if (ret
< 0) {
1335 printf("Can't add property: %s\n", fdt_strerror(ret
));
1341 printf("Can't increase blob size: %s\n", fdt_strerror(ret
));
1347 * Verify the physical address of device tree node for a given alias
1349 * This function locates the device tree node of a given alias, and then
1350 * verifies that the physical address of that device matches the given
1351 * parameter. It displays a message if there is a mismatch.
1353 * Returns 1 on success, 0 on failure
1355 int fdt_verify_alias_address(void *fdt
, int anode
, const char *alias
, u64 addr
)
1362 path
= fdt_getprop(fdt
, anode
, alias
, NULL
);
1364 /* If there's no such alias, then it's not a failure */
1368 node
= fdt_path_offset(fdt
, path
);
1370 printf("Warning: device tree alias '%s' points to invalid "
1371 "node %s.\n", alias
, path
);
1375 reg
= fdt_getprop(fdt
, node
, "reg", &len
);
1377 printf("Warning: device tree node '%s' has no address.\n",
1382 dt_addr
= fdt_translate_address(fdt
, node
, reg
);
1383 if (addr
!= dt_addr
) {
1384 printf("Warning: U-Boot configured device %s at address %llx,\n"
1385 " but the device tree has it address %llx.\n",
1386 alias
, addr
, dt_addr
);
1394 * Returns the base address of an SOC or PCI node
1396 u64
fdt_get_base_address(void *fdt
, int node
)
1400 const fdt32_t
*prop
;
1402 naddr
= fdt_address_cells(fdt
, node
);
1404 prop
= fdt_getprop(fdt
, node
, "ranges", &size
);
1406 return prop
? fdt_translate_address(fdt
, node
, prop
+ naddr
) : 0;
1410 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1412 static int fdt_read_prop(const fdt32_t
*prop
, int prop_len
, int cell_off
,
1413 uint64_t *val
, int cells
)
1415 const fdt32_t
*prop32
= &prop
[cell_off
];
1416 const fdt64_t
*prop64
= (const fdt64_t
*)&prop
[cell_off
];
1418 if ((cell_off
+ cells
) > prop_len
)
1419 return -FDT_ERR_NOSPACE
;
1423 *val
= fdt32_to_cpu(*prop32
);
1426 *val
= fdt64_to_cpu(*prop64
);
1429 return -FDT_ERR_NOSPACE
;
1436 * fdt_read_range - Read a node's n'th range property
1438 * @fdt: ptr to device tree
1439 * @node: offset of node
1441 * @child_addr: pointer to storage for the "child address" field
1442 * @addr: pointer to storage for the CPU view translated physical start
1443 * @len: pointer to storage for the range length
1445 * Convenience function that reads and interprets a specific range out of
1446 * a number of the "ranges" property array.
1448 int fdt_read_range(void *fdt
, int node
, int n
, uint64_t *child_addr
,
1449 uint64_t *addr
, uint64_t *len
)
1451 int pnode
= fdt_parent_offset(fdt
, node
);
1452 const fdt32_t
*ranges
;
1461 * The "ranges" property is an array of
1462 * { <child address> <parent address> <size in child address space> }
1464 * All 3 elements can span a diffent number of cells. Fetch their size.
1466 pacells
= fdt_getprop_u32_default_node(fdt
, pnode
, 0, "#address-cells", 1);
1467 acells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#address-cells", 1);
1468 scells
= fdt_getprop_u32_default_node(fdt
, node
, 0, "#size-cells", 1);
1470 /* Now try to get the ranges property */
1471 ranges
= fdt_getprop(fdt
, node
, "ranges", &ranges_len
);
1473 return -FDT_ERR_NOTFOUND
;
1474 ranges_len
/= sizeof(uint32_t);
1476 /* Jump to the n'th entry */
1477 cell
= n
* (pacells
+ acells
+ scells
);
1479 /* Read <child address> */
1481 r
= fdt_read_prop(ranges
, ranges_len
, cell
, child_addr
,
1488 /* Read <parent address> */
1490 *addr
= fdt_translate_address(fdt
, node
, ranges
+ cell
);
1493 /* Read <size in child address space> */
1495 r
= fdt_read_prop(ranges
, ranges_len
, cell
, len
, scells
);
1504 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1506 * @fdt: ptr to device tree
1507 * @node: offset of the simplefb node
1508 * @base_address: framebuffer base address
1509 * @width: width in pixels
1510 * @height: height in pixels
1511 * @stride: bytes per line
1512 * @format: pixel format string
1514 * Convenience function to fill and enable a simplefb node.
1516 int fdt_setup_simplefb_node(void *fdt
, int node
, u64 base_address
, u32 width
,
1517 u32 height
, u32 stride
, const char *format
)
1521 int i
, addrc
, sizec
, ret
;
1523 of_bus_default_count_cells(fdt
, fdt_parent_offset(fdt
, node
),
1527 cells
[i
++] = cpu_to_fdt32(base_address
>> 32);
1528 cells
[i
++] = cpu_to_fdt32(base_address
);
1531 cells
[i
++] = cpu_to_fdt32(height
* stride
);
1533 ret
= fdt_setprop(fdt
, node
, "reg", cells
, sizeof(cells
[0]) * i
);
1537 snprintf(name
, sizeof(name
), "framebuffer@%llx", base_address
);
1538 ret
= fdt_set_name(fdt
, node
, name
);
1542 ret
= fdt_setprop_u32(fdt
, node
, "width", width
);
1546 ret
= fdt_setprop_u32(fdt
, node
, "height", height
);
1550 ret
= fdt_setprop_u32(fdt
, node
, "stride", stride
);
1554 ret
= fdt_setprop_string(fdt
, node
, "format", format
);
1558 ret
= fdt_setprop_string(fdt
, node
, "status", "okay");