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Merge git://git.denx.de/u-boot-rockchip
[people/ms/u-boot.git] / cmd / fdt.c
1 /*
2 * (C) Copyright 2007
3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4 * Based on code written by:
5 * Pantelis Antoniou <pantelis.antoniou@gmail.com> and
6 * Matthew McClintock <msm@freescale.com>
7 *
8 * SPDX-License-Identifier: GPL-2.0+
9 */
10
11 #include <common.h>
12 #include <command.h>
13 #include <linux/ctype.h>
14 #include <linux/types.h>
15 #include <asm/global_data.h>
16 #include <libfdt.h>
17 #include <fdt_support.h>
18 #include <mapmem.h>
19 #include <asm/io.h>
20
21 #define MAX_LEVEL 32 /* how deeply nested we will go */
22 #define SCRATCHPAD 1024 /* bytes of scratchpad memory */
23 #define CMD_FDT_MAX_DUMP 64
24
25 /*
26 * Global data (for the gd->bd)
27 */
28 DECLARE_GLOBAL_DATA_PTR;
29
30 static int fdt_valid(struct fdt_header **blobp);
31 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
32 static int fdt_print(const char *pathp, char *prop, int depth);
33 static int is_printable_string(const void *data, int len);
34
35 /*
36 * The working_fdt points to our working flattened device tree.
37 */
38 struct fdt_header *working_fdt;
39
40 void set_working_fdt_addr(ulong addr)
41 {
42 void *buf;
43
44 buf = map_sysmem(addr, 0);
45 working_fdt = buf;
46 env_set_hex("fdtaddr", addr);
47 }
48
49 /*
50 * Get a value from the fdt and format it to be set in the environment
51 */
52 static int fdt_value_env_set(const void *nodep, int len, const char *var)
53 {
54 if (is_printable_string(nodep, len))
55 env_set(var, (void *)nodep);
56 else if (len == 4) {
57 char buf[11];
58
59 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
60 env_set(var, buf);
61 } else if (len%4 == 0 && len <= 20) {
62 /* Needed to print things like sha1 hashes. */
63 char buf[41];
64 int i;
65
66 for (i = 0; i < len; i += sizeof(unsigned int))
67 sprintf(buf + (i * 2), "%08x",
68 *(unsigned int *)(nodep + i));
69 env_set(var, buf);
70 } else {
71 printf("error: unprintable value\n");
72 return 1;
73 }
74 return 0;
75 }
76
77 /*
78 * Flattened Device Tree command, see the help for parameter definitions.
79 */
80 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
81 {
82 if (argc < 2)
83 return CMD_RET_USAGE;
84
85 /*
86 * Set the address of the fdt
87 */
88 if (strncmp(argv[1], "ad", 2) == 0) {
89 unsigned long addr;
90 int control = 0;
91 struct fdt_header *blob;
92 /*
93 * Set the address [and length] of the fdt.
94 */
95 argc -= 2;
96 argv += 2;
97 /* Temporary #ifdef - some archs don't have fdt_blob yet */
98 #ifdef CONFIG_OF_CONTROL
99 if (argc && !strcmp(*argv, "-c")) {
100 control = 1;
101 argc--;
102 argv++;
103 }
104 #endif
105 if (argc == 0) {
106 if (control)
107 blob = (struct fdt_header *)gd->fdt_blob;
108 else
109 blob = working_fdt;
110 if (!blob || !fdt_valid(&blob))
111 return 1;
112 printf("The address of the fdt is %#08lx\n",
113 control ? (ulong)map_to_sysmem(blob) :
114 env_get_hex("fdtaddr", 0));
115 return 0;
116 }
117
118 addr = simple_strtoul(argv[0], NULL, 16);
119 blob = map_sysmem(addr, 0);
120 if (!fdt_valid(&blob))
121 return 1;
122 if (control)
123 gd->fdt_blob = blob;
124 else
125 set_working_fdt_addr(addr);
126
127 if (argc >= 2) {
128 int len;
129 int err;
130 /*
131 * Optional new length
132 */
133 len = simple_strtoul(argv[1], NULL, 16);
134 if (len < fdt_totalsize(blob)) {
135 printf ("New length %d < existing length %d, "
136 "ignoring.\n",
137 len, fdt_totalsize(blob));
138 } else {
139 /*
140 * Open in place with a new length.
141 */
142 err = fdt_open_into(blob, blob, len);
143 if (err != 0) {
144 printf ("libfdt fdt_open_into(): %s\n",
145 fdt_strerror(err));
146 }
147 }
148 }
149
150 return CMD_RET_SUCCESS;
151 }
152
153 if (!working_fdt) {
154 puts(
155 "No FDT memory address configured. Please configure\n"
156 "the FDT address via \"fdt addr <address>\" command.\n"
157 "Aborting!\n");
158 return CMD_RET_FAILURE;
159 }
160
161 /*
162 * Move the working_fdt
163 */
164 if (strncmp(argv[1], "mo", 2) == 0) {
165 struct fdt_header *newaddr;
166 int len;
167 int err;
168
169 if (argc < 4)
170 return CMD_RET_USAGE;
171
172 /*
173 * Set the address and length of the fdt.
174 */
175 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
176 if (!fdt_valid(&working_fdt))
177 return 1;
178
179 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
180
181 /*
182 * If the user specifies a length, use that. Otherwise use the
183 * current length.
184 */
185 if (argc <= 4) {
186 len = fdt_totalsize(working_fdt);
187 } else {
188 len = simple_strtoul(argv[4], NULL, 16);
189 if (len < fdt_totalsize(working_fdt)) {
190 printf ("New length 0x%X < existing length "
191 "0x%X, aborting.\n",
192 len, fdt_totalsize(working_fdt));
193 return 1;
194 }
195 }
196
197 /*
198 * Copy to the new location.
199 */
200 err = fdt_open_into(working_fdt, newaddr, len);
201 if (err != 0) {
202 printf ("libfdt fdt_open_into(): %s\n",
203 fdt_strerror(err));
204 return 1;
205 }
206 working_fdt = newaddr;
207 #ifdef CONFIG_OF_SYSTEM_SETUP
208 /* Call the board-specific fixup routine */
209 } else if (strncmp(argv[1], "sys", 3) == 0) {
210 int err = ft_system_setup(working_fdt, gd->bd);
211
212 if (err) {
213 printf("Failed to add system information to FDT: %s\n",
214 fdt_strerror(err));
215 return CMD_RET_FAILURE;
216 }
217 #endif
218 /*
219 * Make a new node
220 */
221 } else if (strncmp(argv[1], "mk", 2) == 0) {
222 char *pathp; /* path */
223 char *nodep; /* new node to add */
224 int nodeoffset; /* node offset from libfdt */
225 int err;
226
227 /*
228 * Parameters: Node path, new node to be appended to the path.
229 */
230 if (argc < 4)
231 return CMD_RET_USAGE;
232
233 pathp = argv[2];
234 nodep = argv[3];
235
236 nodeoffset = fdt_path_offset (working_fdt, pathp);
237 if (nodeoffset < 0) {
238 /*
239 * Not found or something else bad happened.
240 */
241 printf ("libfdt fdt_path_offset() returned %s\n",
242 fdt_strerror(nodeoffset));
243 return 1;
244 }
245 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
246 if (err < 0) {
247 printf ("libfdt fdt_add_subnode(): %s\n",
248 fdt_strerror(err));
249 return 1;
250 }
251
252 /*
253 * Set the value of a property in the working_fdt.
254 */
255 } else if (argv[1][0] == 's') {
256 char *pathp; /* path */
257 char *prop; /* property */
258 int nodeoffset; /* node offset from libfdt */
259 static char data[SCRATCHPAD]; /* storage for the property */
260 const void *ptmp;
261 int len; /* new length of the property */
262 int ret; /* return value */
263
264 /*
265 * Parameters: Node path, property, optional value.
266 */
267 if (argc < 4)
268 return CMD_RET_USAGE;
269
270 pathp = argv[2];
271 prop = argv[3];
272
273 nodeoffset = fdt_path_offset (working_fdt, pathp);
274 if (nodeoffset < 0) {
275 /*
276 * Not found or something else bad happened.
277 */
278 printf ("libfdt fdt_path_offset() returned %s\n",
279 fdt_strerror(nodeoffset));
280 return 1;
281 }
282
283 if (argc == 4) {
284 len = 0;
285 } else {
286 ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
287 if (len > SCRATCHPAD) {
288 printf("prop (%d) doesn't fit in scratchpad!\n",
289 len);
290 return 1;
291 }
292 if (ptmp != NULL)
293 memcpy(data, ptmp, len);
294
295 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
296 if (ret != 0)
297 return ret;
298 }
299
300 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
301 if (ret < 0) {
302 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
303 return 1;
304 }
305
306 /********************************************************************
307 * Get the value of a property in the working_fdt.
308 ********************************************************************/
309 } else if (argv[1][0] == 'g') {
310 char *subcmd; /* sub-command */
311 char *pathp; /* path */
312 char *prop; /* property */
313 char *var; /* variable to store result */
314 int nodeoffset; /* node offset from libfdt */
315 const void *nodep; /* property node pointer */
316 int len = 0; /* new length of the property */
317
318 /*
319 * Parameters: Node path, property, optional value.
320 */
321 if (argc < 5)
322 return CMD_RET_USAGE;
323
324 subcmd = argv[2];
325
326 if (argc < 6 && subcmd[0] != 's')
327 return CMD_RET_USAGE;
328
329 var = argv[3];
330 pathp = argv[4];
331 prop = argv[5];
332
333 nodeoffset = fdt_path_offset(working_fdt, pathp);
334 if (nodeoffset < 0) {
335 /*
336 * Not found or something else bad happened.
337 */
338 printf("libfdt fdt_path_offset() returned %s\n",
339 fdt_strerror(nodeoffset));
340 return 1;
341 }
342
343 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
344 int reqIndex = -1;
345 int startDepth = fdt_node_depth(
346 working_fdt, nodeoffset);
347 int curDepth = startDepth;
348 int curIndex = -1;
349 int nextNodeOffset = fdt_next_node(
350 working_fdt, nodeoffset, &curDepth);
351
352 if (subcmd[0] == 'n')
353 reqIndex = simple_strtoul(argv[5], NULL, 16);
354
355 while (curDepth > startDepth) {
356 if (curDepth == startDepth + 1)
357 curIndex++;
358 if (subcmd[0] == 'n' && curIndex == reqIndex) {
359 const char *node_name;
360
361 node_name = fdt_get_name(working_fdt,
362 nextNodeOffset,
363 NULL);
364 env_set(var, node_name);
365 return 0;
366 }
367 nextNodeOffset = fdt_next_node(
368 working_fdt, nextNodeOffset, &curDepth);
369 if (nextNodeOffset < 0)
370 break;
371 }
372 if (subcmd[0] == 's') {
373 /* get the num nodes at this level */
374 env_set_ulong(var, curIndex + 1);
375 } else {
376 /* node index not found */
377 printf("libfdt node not found\n");
378 return 1;
379 }
380 } else {
381 nodep = fdt_getprop(
382 working_fdt, nodeoffset, prop, &len);
383 if (len == 0) {
384 /* no property value */
385 env_set(var, "");
386 return 0;
387 } else if (nodep && len > 0) {
388 if (subcmd[0] == 'v') {
389 int ret;
390
391 ret = fdt_value_env_set(nodep, len,
392 var);
393 if (ret != 0)
394 return ret;
395 } else if (subcmd[0] == 'a') {
396 /* Get address */
397 char buf[11];
398
399 sprintf(buf, "0x%p", nodep);
400 env_set(var, buf);
401 } else if (subcmd[0] == 's') {
402 /* Get size */
403 char buf[11];
404
405 sprintf(buf, "0x%08X", len);
406 env_set(var, buf);
407 } else
408 return CMD_RET_USAGE;
409 return 0;
410 } else {
411 printf("libfdt fdt_getprop(): %s\n",
412 fdt_strerror(len));
413 return 1;
414 }
415 }
416
417 /*
418 * Print (recursive) / List (single level)
419 */
420 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
421 int depth = MAX_LEVEL; /* how deep to print */
422 char *pathp; /* path */
423 char *prop; /* property */
424 int ret; /* return value */
425 static char root[2] = "/";
426
427 /*
428 * list is an alias for print, but limited to 1 level
429 */
430 if (argv[1][0] == 'l') {
431 depth = 1;
432 }
433
434 /*
435 * Get the starting path. The root node is an oddball,
436 * the offset is zero and has no name.
437 */
438 if (argc == 2)
439 pathp = root;
440 else
441 pathp = argv[2];
442 if (argc > 3)
443 prop = argv[3];
444 else
445 prop = NULL;
446
447 ret = fdt_print(pathp, prop, depth);
448 if (ret != 0)
449 return ret;
450
451 /*
452 * Remove a property/node
453 */
454 } else if (strncmp(argv[1], "rm", 2) == 0) {
455 int nodeoffset; /* node offset from libfdt */
456 int err;
457
458 /*
459 * Get the path. The root node is an oddball, the offset
460 * is zero and has no name.
461 */
462 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
463 if (nodeoffset < 0) {
464 /*
465 * Not found or something else bad happened.
466 */
467 printf ("libfdt fdt_path_offset() returned %s\n",
468 fdt_strerror(nodeoffset));
469 return 1;
470 }
471 /*
472 * Do the delete. A fourth parameter means delete a property,
473 * otherwise delete the node.
474 */
475 if (argc > 3) {
476 err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
477 if (err < 0) {
478 printf("libfdt fdt_delprop(): %s\n",
479 fdt_strerror(err));
480 return err;
481 }
482 } else {
483 err = fdt_del_node(working_fdt, nodeoffset);
484 if (err < 0) {
485 printf("libfdt fdt_del_node(): %s\n",
486 fdt_strerror(err));
487 return err;
488 }
489 }
490
491 /*
492 * Display header info
493 */
494 } else if (argv[1][0] == 'h') {
495 u32 version = fdt_version(working_fdt);
496 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
497 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
498 fdt_totalsize(working_fdt));
499 printf("off_dt_struct:\t\t0x%x\n",
500 fdt_off_dt_struct(working_fdt));
501 printf("off_dt_strings:\t\t0x%x\n",
502 fdt_off_dt_strings(working_fdt));
503 printf("off_mem_rsvmap:\t\t0x%x\n",
504 fdt_off_mem_rsvmap(working_fdt));
505 printf("version:\t\t%d\n", version);
506 printf("last_comp_version:\t%d\n",
507 fdt_last_comp_version(working_fdt));
508 if (version >= 2)
509 printf("boot_cpuid_phys:\t0x%x\n",
510 fdt_boot_cpuid_phys(working_fdt));
511 if (version >= 3)
512 printf("size_dt_strings:\t0x%x\n",
513 fdt_size_dt_strings(working_fdt));
514 if (version >= 17)
515 printf("size_dt_struct:\t\t0x%x\n",
516 fdt_size_dt_struct(working_fdt));
517 printf("number mem_rsv:\t\t0x%x\n",
518 fdt_num_mem_rsv(working_fdt));
519 printf("\n");
520
521 /*
522 * Set boot cpu id
523 */
524 } else if (strncmp(argv[1], "boo", 3) == 0) {
525 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
526 fdt_set_boot_cpuid_phys(working_fdt, tmp);
527
528 /*
529 * memory command
530 */
531 } else if (strncmp(argv[1], "me", 2) == 0) {
532 uint64_t addr, size;
533 int err;
534 addr = simple_strtoull(argv[2], NULL, 16);
535 size = simple_strtoull(argv[3], NULL, 16);
536 err = fdt_fixup_memory(working_fdt, addr, size);
537 if (err < 0)
538 return err;
539
540 /*
541 * mem reserve commands
542 */
543 } else if (strncmp(argv[1], "rs", 2) == 0) {
544 if (argv[2][0] == 'p') {
545 uint64_t addr, size;
546 int total = fdt_num_mem_rsv(working_fdt);
547 int j, err;
548 printf("index\t\t start\t\t size\n");
549 printf("-------------------------------"
550 "-----------------\n");
551 for (j = 0; j < total; j++) {
552 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
553 if (err < 0) {
554 printf("libfdt fdt_get_mem_rsv(): %s\n",
555 fdt_strerror(err));
556 return err;
557 }
558 printf(" %x\t%08x%08x\t%08x%08x\n", j,
559 (u32)(addr >> 32),
560 (u32)(addr & 0xffffffff),
561 (u32)(size >> 32),
562 (u32)(size & 0xffffffff));
563 }
564 } else if (argv[2][0] == 'a') {
565 uint64_t addr, size;
566 int err;
567 addr = simple_strtoull(argv[3], NULL, 16);
568 size = simple_strtoull(argv[4], NULL, 16);
569 err = fdt_add_mem_rsv(working_fdt, addr, size);
570
571 if (err < 0) {
572 printf("libfdt fdt_add_mem_rsv(): %s\n",
573 fdt_strerror(err));
574 return err;
575 }
576 } else if (argv[2][0] == 'd') {
577 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
578 int err = fdt_del_mem_rsv(working_fdt, idx);
579
580 if (err < 0) {
581 printf("libfdt fdt_del_mem_rsv(): %s\n",
582 fdt_strerror(err));
583 return err;
584 }
585 } else {
586 /* Unrecognized command */
587 return CMD_RET_USAGE;
588 }
589 }
590 #ifdef CONFIG_OF_BOARD_SETUP
591 /* Call the board-specific fixup routine */
592 else if (strncmp(argv[1], "boa", 3) == 0) {
593 int err = ft_board_setup(working_fdt, gd->bd);
594
595 if (err) {
596 printf("Failed to update board information in FDT: %s\n",
597 fdt_strerror(err));
598 return CMD_RET_FAILURE;
599 }
600 }
601 #endif
602 /* Create a chosen node */
603 else if (strncmp(argv[1], "cho", 3) == 0) {
604 unsigned long initrd_start = 0, initrd_end = 0;
605
606 if ((argc != 2) && (argc != 4))
607 return CMD_RET_USAGE;
608
609 if (argc == 4) {
610 initrd_start = simple_strtoul(argv[2], NULL, 16);
611 initrd_end = simple_strtoul(argv[3], NULL, 16);
612 }
613
614 fdt_chosen(working_fdt);
615 fdt_initrd(working_fdt, initrd_start, initrd_end);
616
617 #if defined(CONFIG_FIT_SIGNATURE)
618 } else if (strncmp(argv[1], "che", 3) == 0) {
619 int cfg_noffset;
620 int ret;
621 unsigned long addr;
622 struct fdt_header *blob;
623
624 if (!working_fdt)
625 return CMD_RET_FAILURE;
626
627 if (argc > 2) {
628 addr = simple_strtoul(argv[2], NULL, 16);
629 blob = map_sysmem(addr, 0);
630 } else {
631 blob = (struct fdt_header *)gd->fdt_blob;
632 }
633 if (!fdt_valid(&blob))
634 return 1;
635
636 gd->fdt_blob = blob;
637 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
638 if (!cfg_noffset) {
639 printf("Could not find configuration node: %s\n",
640 fdt_strerror(cfg_noffset));
641 return CMD_RET_FAILURE;
642 }
643
644 ret = fit_config_verify(working_fdt, cfg_noffset);
645 if (ret == 0)
646 return CMD_RET_SUCCESS;
647 else
648 return CMD_RET_FAILURE;
649 #endif
650
651 }
652 #ifdef CONFIG_OF_LIBFDT_OVERLAY
653 /* apply an overlay */
654 else if (strncmp(argv[1], "ap", 2) == 0) {
655 unsigned long addr;
656 struct fdt_header *blob;
657 int ret;
658
659 if (argc != 3)
660 return CMD_RET_USAGE;
661
662 if (!working_fdt)
663 return CMD_RET_FAILURE;
664
665 addr = simple_strtoul(argv[2], NULL, 16);
666 blob = map_sysmem(addr, 0);
667 if (!fdt_valid(&blob))
668 return CMD_RET_FAILURE;
669
670 ret = fdt_overlay_apply(working_fdt, blob);
671 if (ret) {
672 printf("fdt_overlay_apply(): %s\n", fdt_strerror(ret));
673 return CMD_RET_FAILURE;
674 }
675 }
676 #endif
677 /* resize the fdt */
678 else if (strncmp(argv[1], "re", 2) == 0) {
679 uint extrasize;
680 if (argc > 2)
681 extrasize = simple_strtoul(argv[2], NULL, 16);
682 else
683 extrasize = 0;
684 fdt_shrink_to_minimum(working_fdt, extrasize);
685 }
686 else {
687 /* Unrecognized command */
688 return CMD_RET_USAGE;
689 }
690
691 return 0;
692 }
693
694 /****************************************************************************/
695
696 /**
697 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
698 *
699 * @blobp: Pointer to FDT pointer
700 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
701 */
702 static int fdt_valid(struct fdt_header **blobp)
703 {
704 const void *blob = *blobp;
705 int err;
706
707 if (blob == NULL) {
708 printf ("The address of the fdt is invalid (NULL).\n");
709 return 0;
710 }
711
712 err = fdt_check_header(blob);
713 if (err == 0)
714 return 1; /* valid */
715
716 if (err < 0) {
717 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
718 /*
719 * Be more informative on bad version.
720 */
721 if (err == -FDT_ERR_BADVERSION) {
722 if (fdt_version(blob) <
723 FDT_FIRST_SUPPORTED_VERSION) {
724 printf (" - too old, fdt %d < %d",
725 fdt_version(blob),
726 FDT_FIRST_SUPPORTED_VERSION);
727 }
728 if (fdt_last_comp_version(blob) >
729 FDT_LAST_SUPPORTED_VERSION) {
730 printf (" - too new, fdt %d > %d",
731 fdt_version(blob),
732 FDT_LAST_SUPPORTED_VERSION);
733 }
734 }
735 printf("\n");
736 *blobp = NULL;
737 return 0;
738 }
739 return 1;
740 }
741
742 /****************************************************************************/
743
744 /*
745 * Parse the user's input, partially heuristic. Valid formats:
746 * <0x00112233 4 05> - an array of cells. Numbers follow standard
747 * C conventions.
748 * [00 11 22 .. nn] - byte stream
749 * "string" - If the the value doesn't start with "<" or "[", it is
750 * treated as a string. Note that the quotes are
751 * stripped by the parser before we get the string.
752 * newval: An array of strings containing the new property as specified
753 * on the command line
754 * count: The number of strings in the array
755 * data: A bytestream to be placed in the property
756 * len: The length of the resulting bytestream
757 */
758 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
759 {
760 char *cp; /* temporary char pointer */
761 char *newp; /* temporary newval char pointer */
762 unsigned long tmp; /* holds converted values */
763 int stridx = 0;
764
765 *len = 0;
766 newp = newval[0];
767
768 /* An array of cells */
769 if (*newp == '<') {
770 newp++;
771 while ((*newp != '>') && (stridx < count)) {
772 /*
773 * Keep searching until we find that last ">"
774 * That way users don't have to escape the spaces
775 */
776 if (*newp == '\0') {
777 newp = newval[++stridx];
778 continue;
779 }
780
781 cp = newp;
782 tmp = simple_strtoul(cp, &newp, 0);
783 if (*cp != '?')
784 *(fdt32_t *)data = cpu_to_fdt32(tmp);
785 else
786 newp++;
787
788 data += 4;
789 *len += 4;
790
791 /* If the ptr didn't advance, something went wrong */
792 if ((newp - cp) <= 0) {
793 printf("Sorry, I could not convert \"%s\"\n",
794 cp);
795 return 1;
796 }
797
798 while (*newp == ' ')
799 newp++;
800 }
801
802 if (*newp != '>') {
803 printf("Unexpected character '%c'\n", *newp);
804 return 1;
805 }
806 } else if (*newp == '[') {
807 /*
808 * Byte stream. Convert the values.
809 */
810 newp++;
811 while ((stridx < count) && (*newp != ']')) {
812 while (*newp == ' ')
813 newp++;
814 if (*newp == '\0') {
815 newp = newval[++stridx];
816 continue;
817 }
818 if (!isxdigit(*newp))
819 break;
820 tmp = simple_strtoul(newp, &newp, 16);
821 *data++ = tmp & 0xFF;
822 *len = *len + 1;
823 }
824 if (*newp != ']') {
825 printf("Unexpected character '%c'\n", *newp);
826 return 1;
827 }
828 } else {
829 /*
830 * Assume it is one or more strings. Copy it into our
831 * data area for convenience (including the
832 * terminating '\0's).
833 */
834 while (stridx < count) {
835 size_t length = strlen(newp) + 1;
836 strcpy(data, newp);
837 data += length;
838 *len += length;
839 newp = newval[++stridx];
840 }
841 }
842 return 0;
843 }
844
845 /****************************************************************************/
846
847 /*
848 * Heuristic to guess if this is a string or concatenated strings.
849 */
850
851 static int is_printable_string(const void *data, int len)
852 {
853 const char *s = data;
854
855 /* zero length is not */
856 if (len == 0)
857 return 0;
858
859 /* must terminate with zero or '\n' */
860 if (s[len - 1] != '\0' && s[len - 1] != '\n')
861 return 0;
862
863 /* printable or a null byte (concatenated strings) */
864 while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
865 /*
866 * If we see a null, there are three possibilities:
867 * 1) If len == 1, it is the end of the string, printable
868 * 2) Next character also a null, not printable.
869 * 3) Next character not a null, continue to check.
870 */
871 if (s[0] == '\0') {
872 if (len == 1)
873 return 1;
874 if (s[1] == '\0')
875 return 0;
876 }
877 s++;
878 len--;
879 }
880
881 /* Not the null termination, or not done yet: not printable */
882 if (*s != '\0' || (len != 0))
883 return 0;
884
885 return 1;
886 }
887
888
889 /*
890 * Print the property in the best format, a heuristic guess. Print as
891 * a string, concatenated strings, a byte, word, double word, or (if all
892 * else fails) it is printed as a stream of bytes.
893 */
894 static void print_data(const void *data, int len)
895 {
896 int j;
897
898 /* no data, don't print */
899 if (len == 0)
900 return;
901
902 /*
903 * It is a string, but it may have multiple strings (embedded '\0's).
904 */
905 if (is_printable_string(data, len)) {
906 puts("\"");
907 j = 0;
908 while (j < len) {
909 if (j > 0)
910 puts("\", \"");
911 puts(data);
912 j += strlen(data) + 1;
913 data += strlen(data) + 1;
914 }
915 puts("\"");
916 return;
917 }
918
919 if ((len %4) == 0) {
920 if (len > CMD_FDT_MAX_DUMP)
921 printf("* 0x%p [0x%08x]", data, len);
922 else {
923 const __be32 *p;
924
925 printf("<");
926 for (j = 0, p = data; j < len/4; j++)
927 printf("0x%08x%s", fdt32_to_cpu(p[j]),
928 j < (len/4 - 1) ? " " : "");
929 printf(">");
930 }
931 } else { /* anything else... hexdump */
932 if (len > CMD_FDT_MAX_DUMP)
933 printf("* 0x%p [0x%08x]", data, len);
934 else {
935 const u8 *s;
936
937 printf("[");
938 for (j = 0, s = data; j < len; j++)
939 printf("%02x%s", s[j], j < len - 1 ? " " : "");
940 printf("]");
941 }
942 }
943 }
944
945 /****************************************************************************/
946
947 /*
948 * Recursively print (a portion of) the working_fdt. The depth parameter
949 * determines how deeply nested the fdt is printed.
950 */
951 static int fdt_print(const char *pathp, char *prop, int depth)
952 {
953 static char tabs[MAX_LEVEL+1] =
954 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
955 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
956 const void *nodep; /* property node pointer */
957 int nodeoffset; /* node offset from libfdt */
958 int nextoffset; /* next node offset from libfdt */
959 uint32_t tag; /* tag */
960 int len; /* length of the property */
961 int level = 0; /* keep track of nesting level */
962 const struct fdt_property *fdt_prop;
963
964 nodeoffset = fdt_path_offset (working_fdt, pathp);
965 if (nodeoffset < 0) {
966 /*
967 * Not found or something else bad happened.
968 */
969 printf ("libfdt fdt_path_offset() returned %s\n",
970 fdt_strerror(nodeoffset));
971 return 1;
972 }
973 /*
974 * The user passed in a property as well as node path.
975 * Print only the given property and then return.
976 */
977 if (prop) {
978 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
979 if (len == 0) {
980 /* no property value */
981 printf("%s %s\n", pathp, prop);
982 return 0;
983 } else if (nodep && len > 0) {
984 printf("%s = ", prop);
985 print_data (nodep, len);
986 printf("\n");
987 return 0;
988 } else {
989 printf ("libfdt fdt_getprop(): %s\n",
990 fdt_strerror(len));
991 return 1;
992 }
993 }
994
995 /*
996 * The user passed in a node path and no property,
997 * print the node and all subnodes.
998 */
999 while(level >= 0) {
1000 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1001 switch(tag) {
1002 case FDT_BEGIN_NODE:
1003 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1004 if (level <= depth) {
1005 if (pathp == NULL)
1006 pathp = "/* NULL pointer error */";
1007 if (*pathp == '\0')
1008 pathp = "/"; /* root is nameless */
1009 printf("%s%s {\n",
1010 &tabs[MAX_LEVEL - level], pathp);
1011 }
1012 level++;
1013 if (level >= MAX_LEVEL) {
1014 printf("Nested too deep, aborting.\n");
1015 return 1;
1016 }
1017 break;
1018 case FDT_END_NODE:
1019 level--;
1020 if (level <= depth)
1021 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1022 if (level == 0) {
1023 level = -1; /* exit the loop */
1024 }
1025 break;
1026 case FDT_PROP:
1027 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1028 sizeof(*fdt_prop));
1029 pathp = fdt_string(working_fdt,
1030 fdt32_to_cpu(fdt_prop->nameoff));
1031 len = fdt32_to_cpu(fdt_prop->len);
1032 nodep = fdt_prop->data;
1033 if (len < 0) {
1034 printf ("libfdt fdt_getprop(): %s\n",
1035 fdt_strerror(len));
1036 return 1;
1037 } else if (len == 0) {
1038 /* the property has no value */
1039 if (level <= depth)
1040 printf("%s%s;\n",
1041 &tabs[MAX_LEVEL - level],
1042 pathp);
1043 } else {
1044 if (level <= depth) {
1045 printf("%s%s = ",
1046 &tabs[MAX_LEVEL - level],
1047 pathp);
1048 print_data (nodep, len);
1049 printf(";\n");
1050 }
1051 }
1052 break;
1053 case FDT_NOP:
1054 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1055 break;
1056 case FDT_END:
1057 return 1;
1058 default:
1059 if (level <= depth)
1060 printf("Unknown tag 0x%08X\n", tag);
1061 return 1;
1062 }
1063 nodeoffset = nextoffset;
1064 }
1065 return 0;
1066 }
1067
1068 /********************************************************************/
1069 #ifdef CONFIG_SYS_LONGHELP
1070 static char fdt_help_text[] =
1071 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1072 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1073 "fdt apply <addr> - Apply overlay to the DT\n"
1074 #endif
1075 #ifdef CONFIG_OF_BOARD_SETUP
1076 "fdt boardsetup - Do board-specific set up\n"
1077 #endif
1078 #ifdef CONFIG_OF_SYSTEM_SETUP
1079 "fdt systemsetup - Do system-specific set up\n"
1080 #endif
1081 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1082 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1083 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1084 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1085 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1086 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1087 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1088 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1089 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1090 "fdt mknode <path> <node> - Create a new node after <path>\n"
1091 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1092 "fdt header - Display header info\n"
1093 "fdt bootcpu <id> - Set boot cpuid\n"
1094 "fdt memory <addr> <size> - Add/Update memory node\n"
1095 "fdt rsvmem print - Show current mem reserves\n"
1096 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1097 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1098 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1099 " <start>/<end> - initrd start/end addr\n"
1100 #if defined(CONFIG_FIT_SIGNATURE)
1101 "fdt checksign [<addr>] - check FIT signature\n"
1102 " <start> - addr of key blob\n"
1103 " default gd->fdt_blob\n"
1104 #endif
1105 "NOTE: Dereference aliases by omitting the leading '/', "
1106 "e.g. fdt print ethernet0.";
1107 #endif
1108
1109 U_BOOT_CMD(
1110 fdt, 255, 0, do_fdt,
1111 "flattened device tree utility commands", fdt_help_text
1112 );
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