-
Notifications
You must be signed in to change notification settings - Fork 0
/
fdtdec.c
1246 lines (1065 loc) · 31.2 KB
/
fdtdec.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Copyright (c) 2011 The Chromium OS Authors.
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef USE_HOSTCC
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <serial.h>
#include <libfdt.h>
#include <fdt_support.h>
#include <fdtdec.h>
#include <asm/sections.h>
#include <dm/of_extra.h>
#include <linux/ctype.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Here are the type we know about. One day we might allow drivers to
* register. For now we just put them here. The COMPAT macro allows us to
* turn this into a sparse list later, and keeps the ID with the name.
*
* NOTE: This list is basically a TODO list for things that need to be
* converted to driver model. So don't add new things here unless there is a
* good reason why driver-model conversion is infeasible. Examples include
* things which are used before driver model is available.
*/
#define COMPAT(id, name) name
static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(UNKNOWN, "<none>"),
COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"),
COMPAT(NVIDIA_TEGRA186_SDMMC, "nvidia,tegra186-sdhci"),
COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"),
COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
COMPAT(SMSC_LAN9215, "smsc,lan9215"),
COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
COMPAT(INTEL_MICROCODE, "intel,microcode"),
COMPAT(AMS_AS3722, "ams,as3722"),
COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),
COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"),
COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"),
COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"),
COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"),
COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"),
};
const char *fdtdec_get_compatible(enum fdt_compat_id id)
{
/* We allow reading of the 'unknown' ID for testing purposes */
assert(id >= 0 && id < COMPAT_COUNT);
return compat_names[id];
}
fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
const char *prop_name, int index, int na, int ns,
fdt_size_t *sizep, bool translate)
{
const fdt32_t *prop, *prop_end;
const fdt32_t *prop_addr, *prop_size, *prop_after_size;
int len;
fdt_addr_t addr;
debug("%s: %s: ", __func__, prop_name);
if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
debug("(na too large for fdt_addr_t type)\n");
return FDT_ADDR_T_NONE;
}
if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
debug("(ns too large for fdt_size_t type)\n");
return FDT_ADDR_T_NONE;
}
prop = fdt_getprop(blob, node, prop_name, &len);
if (!prop) {
debug("(not found)\n");
return FDT_ADDR_T_NONE;
}
prop_end = prop + (len / sizeof(*prop));
prop_addr = prop + (index * (na + ns));
prop_size = prop_addr + na;
prop_after_size = prop_size + ns;
if (prop_after_size > prop_end) {
debug("(not enough data: expected >= %d cells, got %d cells)\n",
(u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
return FDT_ADDR_T_NONE;
}
#if CONFIG_IS_ENABLED(OF_TRANSLATE)
if (translate)
addr = fdt_translate_address(blob, node, prop_addr);
else
#endif
addr = fdtdec_get_number(prop_addr, na);
if (sizep) {
*sizep = fdtdec_get_number(prop_size, ns);
debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
(unsigned long long)*sizep);
} else {
debug("addr=%08llx\n", (unsigned long long)addr);
}
return addr;
}
fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
int node, const char *prop_name, int index, fdt_size_t *sizep,
bool translate)
{
int na, ns;
debug("%s: ", __func__);
na = fdt_address_cells(blob, parent);
if (na < 1) {
debug("(bad #address-cells)\n");
return FDT_ADDR_T_NONE;
}
ns = fdt_size_cells(blob, parent);
if (ns < 0) {
debug("(bad #size-cells)\n");
return FDT_ADDR_T_NONE;
}
debug("na=%d, ns=%d, ", na, ns);
return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
ns, sizep, translate);
}
fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
const char *prop_name, int index, fdt_size_t *sizep,
bool translate)
{
int parent;
debug("%s: ", __func__);
parent = fdt_parent_offset(blob, node);
if (parent < 0) {
debug("(no parent found)\n");
return FDT_ADDR_T_NONE;
}
return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
index, sizep, translate);
}
fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
const char *prop_name, fdt_size_t *sizep)
{
int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
sizeof(fdt_addr_t) / sizeof(fdt32_t),
ns, sizep, false);
}
fdt_addr_t fdtdec_get_addr(const void *blob, int node,
const char *prop_name)
{
return fdtdec_get_addr_size(blob, node, prop_name, NULL);
}
#if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
const char *prop_name, struct fdt_pci_addr *addr)
{
const u32 *cell;
int len;
int ret = -ENOENT;
debug("%s: %s: ", __func__, prop_name);
/*
* If we follow the pci bus bindings strictly, we should check
* the value of the node's parent node's #address-cells and
* #size-cells. They need to be 3 and 2 accordingly. However,
* for simplicity we skip the check here.
*/
cell = fdt_getprop(blob, node, prop_name, &len);
if (!cell)
goto fail;
if ((len % FDT_PCI_REG_SIZE) == 0) {
int num = len / FDT_PCI_REG_SIZE;
int i;
for (i = 0; i < num; i++) {
debug("pci address #%d: %08lx %08lx %08lx\n", i,
(ulong)fdt32_to_cpu(cell[0]),
(ulong)fdt32_to_cpu(cell[1]),
(ulong)fdt32_to_cpu(cell[2]));
if ((fdt32_to_cpu(*cell) & type) == type) {
addr->phys_hi = fdt32_to_cpu(cell[0]);
addr->phys_mid = fdt32_to_cpu(cell[1]);
addr->phys_lo = fdt32_to_cpu(cell[1]);
break;
} else {
cell += (FDT_PCI_ADDR_CELLS +
FDT_PCI_SIZE_CELLS);
}
}
if (i == num) {
ret = -ENXIO;
goto fail;
}
return 0;
} else {
ret = -EINVAL;
}
fail:
debug("(not found)\n");
return ret;
}
int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
{
const char *list, *end;
int len;
list = fdt_getprop(blob, node, "compatible", &len);
if (!list)
return -ENOENT;
end = list + len;
while (list < end) {
char *s;
len = strlen(list);
if (len >= strlen("pciVVVV,DDDD")) {
s = strstr(list, "pci");
/*
* check if the string is something like pciVVVV,DDDD.RR
* or just pciVVVV,DDDD
*/
if (s && s[7] == ',' &&
(s[12] == '.' || s[12] == 0)) {
s += 3;
*vendor = simple_strtol(s, NULL, 16);
s += 5;
*device = simple_strtol(s, NULL, 16);
return 0;
}
}
list += (len + 1);
}
return -ENOENT;
}
int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
u32 *bar)
{
int barnum;
/* extract the bar number from fdt_pci_addr */
barnum = addr->phys_hi & 0xff;
if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
return -EINVAL;
barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
*bar = dm_pci_read_bar32(dev, barnum);
return 0;
}
#endif
uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
uint64_t default_val)
{
const uint64_t *cell64;
int length;
cell64 = fdt_getprop(blob, node, prop_name, &length);
if (!cell64 || length < sizeof(*cell64))
return default_val;
return fdt64_to_cpu(*cell64);
}
int fdtdec_get_is_enabled(const void *blob, int node)
{
const char *cell;
/*
* It should say "okay", so only allow that. Some fdts use "ok" but
* this is a bug. Please fix your device tree source file. See here
* for discussion:
*
* http://www.mail-archive.com/[email protected]/msg71598.html
*/
cell = fdt_getprop(blob, node, "status", NULL);
if (cell)
return 0 == strcmp(cell, "okay");
return 1;
}
enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
{
enum fdt_compat_id id;
/* Search our drivers */
for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
if (0 == fdt_node_check_compatible(blob, node,
compat_names[id]))
return id;
return COMPAT_UNKNOWN;
}
int fdtdec_next_compatible(const void *blob, int node,
enum fdt_compat_id id)
{
return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
}
int fdtdec_next_compatible_subnode(const void *blob, int node,
enum fdt_compat_id id, int *depthp)
{
do {
node = fdt_next_node(blob, node, depthp);
} while (*depthp > 1);
/* If this is a direct subnode, and compatible, return it */
if (*depthp == 1 && 0 == fdt_node_check_compatible(
blob, node, compat_names[id]))
return node;
return -FDT_ERR_NOTFOUND;
}
int fdtdec_next_alias(const void *blob, const char *name,
enum fdt_compat_id id, int *upto)
{
#define MAX_STR_LEN 20
char str[MAX_STR_LEN + 20];
int node, err;
/* snprintf() is not available */
assert(strlen(name) < MAX_STR_LEN);
sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
node = fdt_path_offset(blob, str);
if (node < 0)
return node;
err = fdt_node_check_compatible(blob, node, compat_names[id]);
if (err < 0)
return err;
if (err)
return -FDT_ERR_NOTFOUND;
(*upto)++;
return node;
}
int fdtdec_find_aliases_for_id(const void *blob, const char *name,
enum fdt_compat_id id, int *node_list, int maxcount)
{
memset(node_list, '\0', sizeof(*node_list) * maxcount);
return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
}
/* TODO: Can we tighten this code up a little? */
int fdtdec_add_aliases_for_id(const void *blob, const char *name,
enum fdt_compat_id id, int *node_list, int maxcount)
{
int name_len = strlen(name);
int nodes[maxcount];
int num_found = 0;
int offset, node;
int alias_node;
int count;
int i, j;
/* find the alias node if present */
alias_node = fdt_path_offset(blob, "/aliases");
/*
* start with nothing, and we can assume that the root node can't
* match
*/
memset(nodes, '\0', sizeof(nodes));
/* First find all the compatible nodes */
for (node = count = 0; node >= 0 && count < maxcount;) {
node = fdtdec_next_compatible(blob, node, id);
if (node >= 0)
nodes[count++] = node;
}
if (node >= 0)
debug("%s: warning: maxcount exceeded with alias '%s'\n",
__func__, name);
/* Now find all the aliases */
for (offset = fdt_first_property_offset(blob, alias_node);
offset > 0;
offset = fdt_next_property_offset(blob, offset)) {
const struct fdt_property *prop;
const char *path;
int number;
int found;
node = 0;
prop = fdt_get_property_by_offset(blob, offset, NULL);
path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
if (prop->len && 0 == strncmp(path, name, name_len))
node = fdt_path_offset(blob, prop->data);
if (node <= 0)
continue;
/* Get the alias number */
number = simple_strtoul(path + name_len, NULL, 10);
if (number < 0 || number >= maxcount) {
debug("%s: warning: alias '%s' is out of range\n",
__func__, path);
continue;
}
/* Make sure the node we found is actually in our list! */
found = -1;
for (j = 0; j < count; j++)
if (nodes[j] == node) {
found = j;
break;
}
if (found == -1) {
debug("%s: warning: alias '%s' points to a node "
"'%s' that is missing or is not compatible "
" with '%s'\n", __func__, path,
fdt_get_name(blob, node, NULL),
compat_names[id]);
continue;
}
/*
* Add this node to our list in the right place, and mark
* it as done.
*/
if (fdtdec_get_is_enabled(blob, node)) {
if (node_list[number]) {
debug("%s: warning: alias '%s' requires that "
"a node be placed in the list in a "
"position which is already filled by "
"node '%s'\n", __func__, path,
fdt_get_name(blob, node, NULL));
continue;
}
node_list[number] = node;
if (number >= num_found)
num_found = number + 1;
}
nodes[found] = 0;
}
/* Add any nodes not mentioned by an alias */
for (i = j = 0; i < maxcount; i++) {
if (!node_list[i]) {
for (; j < maxcount; j++)
if (nodes[j] &&
fdtdec_get_is_enabled(blob, nodes[j]))
break;
/* Have we run out of nodes to add? */
if (j == maxcount)
break;
assert(!node_list[i]);
node_list[i] = nodes[j++];
if (i >= num_found)
num_found = i + 1;
}
}
return num_found;
}
int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
int *seqp)
{
int base_len = strlen(base);
const char *find_name;
int find_namelen;
int prop_offset;
int aliases;
find_name = fdt_get_name(blob, offset, &find_namelen);
debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
aliases = fdt_path_offset(blob, "/aliases");
for (prop_offset = fdt_first_property_offset(blob, aliases);
prop_offset > 0;
prop_offset = fdt_next_property_offset(blob, prop_offset)) {
const char *prop;
const char *name;
const char *slash;
int len, val;
prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
debug(" - %s, %s\n", name, prop);
if (len < find_namelen || *prop != '/' || prop[len - 1] ||
strncmp(name, base, base_len))
continue;
slash = strrchr(prop, '/');
if (strcmp(slash + 1, find_name))
continue;
val = trailing_strtol(name);
if (val != -1) {
*seqp = val;
debug("Found seq %d\n", *seqp);
return 0;
}
}
debug("Not found\n");
return -ENOENT;
}
const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
{
int chosen_node;
if (!blob)
return NULL;
chosen_node = fdt_path_offset(blob, "/chosen");
return fdt_getprop(blob, chosen_node, name, NULL);
}
int fdtdec_get_chosen_node(const void *blob, const char *name)
{
const char *prop;
prop = fdtdec_get_chosen_prop(blob, name);
if (!prop)
return -FDT_ERR_NOTFOUND;
return fdt_path_offset(blob, prop);
}
int fdtdec_check_fdt(void)
{
/*
* We must have an FDT, but we cannot panic() yet since the console
* is not ready. So for now, just assert(). Boards which need an early
* FDT (prior to console ready) will need to make their own
* arrangements and do their own checks.
*/
assert(!fdtdec_prepare_fdt());
return 0;
}
/*
* This function is a little odd in that it accesses global data. At some
* point if the architecture board.c files merge this will make more sense.
* Even now, it is common code.
*/
int fdtdec_prepare_fdt(void)
{
if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
fdt_check_header(gd->fdt_blob)) {
#ifdef CONFIG_SPL_BUILD
puts("Missing DTB\n");
#else
puts("No valid device tree binary found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
# ifdef DEBUG
if (gd->fdt_blob) {
printf("fdt_blob=%p\n", gd->fdt_blob);
print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
32, 0);
}
# endif
#endif
return -1;
}
return 0;
}
int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
{
const u32 *phandle;
int lookup;
debug("%s: %s\n", __func__, prop_name);
phandle = fdt_getprop(blob, node, prop_name, NULL);
if (!phandle)
return -FDT_ERR_NOTFOUND;
lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
return lookup;
}
/**
* Look up a property in a node and check that it has a minimum length.
*
* @param blob FDT blob
* @param node node to examine
* @param prop_name name of property to find
* @param min_len minimum property length in bytes
* @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
found, or -FDT_ERR_BADLAYOUT if not enough data
* @return pointer to cell, which is only valid if err == 0
*/
static const void *get_prop_check_min_len(const void *blob, int node,
const char *prop_name, int min_len, int *err)
{
const void *cell;
int len;
debug("%s: %s\n", __func__, prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
if (!cell)
*err = -FDT_ERR_NOTFOUND;
else if (len < min_len)
*err = -FDT_ERR_BADLAYOUT;
else
*err = 0;
return cell;
}
int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
u32 *array, int count)
{
const u32 *cell;
int i, err = 0;
debug("%s: %s\n", __func__, prop_name);
cell = get_prop_check_min_len(blob, node, prop_name,
sizeof(u32) * count, &err);
if (!err) {
for (i = 0; i < count; i++)
array[i] = fdt32_to_cpu(cell[i]);
}
return err;
}
int fdtdec_get_int_array_count(const void *blob, int node,
const char *prop_name, u32 *array, int count)
{
const u32 *cell;
int len, elems;
int i;
debug("%s: %s\n", __func__, prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
if (!cell)
return -FDT_ERR_NOTFOUND;
elems = len / sizeof(u32);
if (count > elems)
count = elems;
for (i = 0; i < count; i++)
array[i] = fdt32_to_cpu(cell[i]);
return count;
}
const u32 *fdtdec_locate_array(const void *blob, int node,
const char *prop_name, int count)
{
const u32 *cell;
int err;
cell = get_prop_check_min_len(blob, node, prop_name,
sizeof(u32) * count, &err);
return err ? NULL : cell;
}
int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
{
const s32 *cell;
int len;
debug("%s: %s\n", __func__, prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
return cell != NULL;
}
int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
const char *list_name,
const char *cells_name,
int cell_count, int index,
struct fdtdec_phandle_args *out_args)
{
const __be32 *list, *list_end;
int rc = 0, size, cur_index = 0;
uint32_t count = 0;
int node = -1;
int phandle;
/* Retrieve the phandle list property */
list = fdt_getprop(blob, src_node, list_name, &size);
if (!list)
return -ENOENT;
list_end = list + size / sizeof(*list);
/* Loop over the phandles until all the requested entry is found */
while (list < list_end) {
rc = -EINVAL;
count = 0;
/*
* If phandle is 0, then it is an empty entry with no
* arguments. Skip forward to the next entry.
*/
phandle = be32_to_cpup(list++);
if (phandle) {
/*
* Find the provider node and parse the #*-cells
* property to determine the argument length.
*
* This is not needed if the cell count is hard-coded
* (i.e. cells_name not set, but cell_count is set),
* except when we're going to return the found node
* below.
*/
if (cells_name || cur_index == index) {
node = fdt_node_offset_by_phandle(blob,
phandle);
if (!node) {
debug("%s: could not find phandle\n",
fdt_get_name(blob, src_node,
NULL));
goto err;
}
}
if (cells_name) {
count = fdtdec_get_int(blob, node, cells_name,
-1);
if (count == -1) {
debug("%s: could not get %s for %s\n",
fdt_get_name(blob, src_node,
NULL),
cells_name,
fdt_get_name(blob, node,
NULL));
goto err;
}
} else {
count = cell_count;
}
/*
* Make sure that the arguments actually fit in the
* remaining property data length
*/
if (list + count > list_end) {
debug("%s: arguments longer than property\n",
fdt_get_name(blob, src_node, NULL));
goto err;
}
}
/*
* All of the error cases above bail out of the loop, so at
* this point, the parsing is successful. If the requested
* index matches, then fill the out_args structure and return,
* or return -ENOENT for an empty entry.
*/
rc = -ENOENT;
if (cur_index == index) {
if (!phandle)
goto err;
if (out_args) {
int i;
if (count > MAX_PHANDLE_ARGS) {
debug("%s: too many arguments %d\n",
fdt_get_name(blob, src_node,
NULL), count);
count = MAX_PHANDLE_ARGS;
}
out_args->node = node;
out_args->args_count = count;
for (i = 0; i < count; i++) {
out_args->args[i] =
be32_to_cpup(list++);
}
}
/* Found it! return success */
return 0;
}
node = -1;
list += count;
cur_index++;
}
/*
* Result will be one of:
* -ENOENT : index is for empty phandle
* -EINVAL : parsing error on data
* [1..n] : Number of phandle (count mode; when index = -1)
*/
rc = index < 0 ? cur_index : -ENOENT;
err:
return rc;
}
int fdtdec_get_child_count(const void *blob, int node)
{
int subnode;
int num = 0;
fdt_for_each_subnode(subnode, blob, node)
num++;
return num;
}
int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
u8 *array, int count)
{
const u8 *cell;
int err;
cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
if (!err)
memcpy(array, cell, count);
return err;
}
const u8 *fdtdec_locate_byte_array(const void *blob, int node,
const char *prop_name, int count)
{
const u8 *cell;
int err;
cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
if (err)
return NULL;
return cell;
}
int fdtdec_get_config_int(const void *blob, const char *prop_name,
int default_val)
{
int config_node;
debug("%s: %s\n", __func__, prop_name);
config_node = fdt_path_offset(blob, "/config");
if (config_node < 0)
return default_val;
return fdtdec_get_int(blob, config_node, prop_name, default_val);
}
int fdtdec_get_config_bool(const void *blob, const char *prop_name)
{
int config_node;
const void *prop;
debug("%s: %s\n", __func__, prop_name);
config_node = fdt_path_offset(blob, "/config");
if (config_node < 0)
return 0;
prop = fdt_get_property(blob, config_node, prop_name, NULL);
return prop != NULL;
}
char *fdtdec_get_config_string(const void *blob, const char *prop_name)
{
const char *nodep;
int nodeoffset;
int len;
debug("%s: %s\n", __func__, prop_name);
nodeoffset = fdt_path_offset(blob, "/config");
if (nodeoffset < 0)
return NULL;
nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
if (!nodep)
return NULL;
return (char *)nodep;
}
int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
fdt_addr_t *basep, fdt_size_t *sizep)
{
const fdt_addr_t *cell;
int len;
debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
debug("cell=%p, len=%d\n", cell, len);
return -1;
}
*basep = fdt_addr_to_cpu(*cell);
*sizep = fdt_size_to_cpu(cell[1]);
debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
(ulong)*sizep);
return 0;
}
u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
{
u64 number = 0;
while (cells--)
number = (number << 32) | fdt32_to_cpu(*ptr++);
return number;
}
int fdt_get_resource(const void *fdt, int node, const char *property,
unsigned int index, struct fdt_resource *res)
{
const fdt32_t *ptr, *end;
int na, ns, len, parent;
unsigned int i = 0;
parent = fdt_parent_offset(fdt, node);
if (parent < 0)
return parent;
na = fdt_address_cells(fdt, parent);
ns = fdt_size_cells(fdt, parent);
ptr = fdt_getprop(fdt, node, property, &len);
if (!ptr)
return len;
end = ptr + len / sizeof(*ptr);
while (ptr + na + ns <= end) {
if (i == index) {
res->start = res->end = fdtdec_get_number(ptr, na);
res->end += fdtdec_get_number(&ptr[na], ns) - 1;
return 0;
}
ptr += na + ns;
i++;
}
return -FDT_ERR_NOTFOUND;
}
int fdt_get_named_resource(const void *fdt, int node, const char *property,
const char *prop_names, const char *name,
struct fdt_resource *res)
{
int index;
index = fdt_stringlist_search(fdt, node, prop_names, name);
if (index < 0)
return index;
return fdt_get_resource(fdt, node, property, index, res);
}