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);