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Merge branch 'master' of git://git.denx.de/u-boot-samsung
[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 setenv_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_setenv(const void *nodep, int len, const char *var)
53 {
54 if (is_printable_string(nodep, len))
55 setenv(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 setenv(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 setenv(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 getenv_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 memcpy(data, ptmp, len);
293 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
294 if (ret != 0)
295 return ret;
296 }
297
298 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
299 if (ret < 0) {
300 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
301 return 1;
302 }
303
304 /********************************************************************
305 * Get the value of a property in the working_fdt.
306 ********************************************************************/
307 } else if (argv[1][0] == 'g') {
308 char *subcmd; /* sub-command */
309 char *pathp; /* path */
310 char *prop; /* property */
311 char *var; /* variable to store result */
312 int nodeoffset; /* node offset from libfdt */
313 const void *nodep; /* property node pointer */
314 int len = 0; /* new length of the property */
315
316 /*
317 * Parameters: Node path, property, optional value.
318 */
319 if (argc < 5)
320 return CMD_RET_USAGE;
321
322 subcmd = argv[2];
323
324 if (argc < 6 && subcmd[0] != 's')
325 return CMD_RET_USAGE;
326
327 var = argv[3];
328 pathp = argv[4];
329 prop = argv[5];
330
331 nodeoffset = fdt_path_offset(working_fdt, pathp);
332 if (nodeoffset < 0) {
333 /*
334 * Not found or something else bad happened.
335 */
336 printf("libfdt fdt_path_offset() returned %s\n",
337 fdt_strerror(nodeoffset));
338 return 1;
339 }
340
341 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
342 int reqIndex = -1;
343 int startDepth = fdt_node_depth(
344 working_fdt, nodeoffset);
345 int curDepth = startDepth;
346 int curIndex = -1;
347 int nextNodeOffset = fdt_next_node(
348 working_fdt, nodeoffset, &curDepth);
349
350 if (subcmd[0] == 'n')
351 reqIndex = simple_strtoul(argv[5], NULL, 16);
352
353 while (curDepth > startDepth) {
354 if (curDepth == startDepth + 1)
355 curIndex++;
356 if (subcmd[0] == 'n' && curIndex == reqIndex) {
357 const char *nodeName = fdt_get_name(
358 working_fdt, nextNodeOffset, NULL);
359
360 setenv(var, (char *)nodeName);
361 return 0;
362 }
363 nextNodeOffset = fdt_next_node(
364 working_fdt, nextNodeOffset, &curDepth);
365 if (nextNodeOffset < 0)
366 break;
367 }
368 if (subcmd[0] == 's') {
369 /* get the num nodes at this level */
370 setenv_ulong(var, curIndex + 1);
371 } else {
372 /* node index not found */
373 printf("libfdt node not found\n");
374 return 1;
375 }
376 } else {
377 nodep = fdt_getprop(
378 working_fdt, nodeoffset, prop, &len);
379 if (len == 0) {
380 /* no property value */
381 setenv(var, "");
382 return 0;
383 } else if (nodep && len > 0) {
384 if (subcmd[0] == 'v') {
385 int ret;
386
387 ret = fdt_value_setenv(nodep, len, var);
388 if (ret != 0)
389 return ret;
390 } else if (subcmd[0] == 'a') {
391 /* Get address */
392 char buf[11];
393
394 sprintf(buf, "0x%p", nodep);
395 setenv(var, buf);
396 } else if (subcmd[0] == 's') {
397 /* Get size */
398 char buf[11];
399
400 sprintf(buf, "0x%08X", len);
401 setenv(var, buf);
402 } else
403 return CMD_RET_USAGE;
404 return 0;
405 } else {
406 printf("libfdt fdt_getprop(): %s\n",
407 fdt_strerror(len));
408 return 1;
409 }
410 }
411
412 /*
413 * Print (recursive) / List (single level)
414 */
415 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
416 int depth = MAX_LEVEL; /* how deep to print */
417 char *pathp; /* path */
418 char *prop; /* property */
419 int ret; /* return value */
420 static char root[2] = "/";
421
422 /*
423 * list is an alias for print, but limited to 1 level
424 */
425 if (argv[1][0] == 'l') {
426 depth = 1;
427 }
428
429 /*
430 * Get the starting path. The root node is an oddball,
431 * the offset is zero and has no name.
432 */
433 if (argc == 2)
434 pathp = root;
435 else
436 pathp = argv[2];
437 if (argc > 3)
438 prop = argv[3];
439 else
440 prop = NULL;
441
442 ret = fdt_print(pathp, prop, depth);
443 if (ret != 0)
444 return ret;
445
446 /*
447 * Remove a property/node
448 */
449 } else if (strncmp(argv[1], "rm", 2) == 0) {
450 int nodeoffset; /* node offset from libfdt */
451 int err;
452
453 /*
454 * Get the path. The root node is an oddball, the offset
455 * is zero and has no name.
456 */
457 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
458 if (nodeoffset < 0) {
459 /*
460 * Not found or something else bad happened.
461 */
462 printf ("libfdt fdt_path_offset() returned %s\n",
463 fdt_strerror(nodeoffset));
464 return 1;
465 }
466 /*
467 * Do the delete. A fourth parameter means delete a property,
468 * otherwise delete the node.
469 */
470 if (argc > 3) {
471 err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
472 if (err < 0) {
473 printf("libfdt fdt_delprop(): %s\n",
474 fdt_strerror(err));
475 return err;
476 }
477 } else {
478 err = fdt_del_node(working_fdt, nodeoffset);
479 if (err < 0) {
480 printf("libfdt fdt_del_node(): %s\n",
481 fdt_strerror(err));
482 return err;
483 }
484 }
485
486 /*
487 * Display header info
488 */
489 } else if (argv[1][0] == 'h') {
490 u32 version = fdt_version(working_fdt);
491 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
492 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
493 fdt_totalsize(working_fdt));
494 printf("off_dt_struct:\t\t0x%x\n",
495 fdt_off_dt_struct(working_fdt));
496 printf("off_dt_strings:\t\t0x%x\n",
497 fdt_off_dt_strings(working_fdt));
498 printf("off_mem_rsvmap:\t\t0x%x\n",
499 fdt_off_mem_rsvmap(working_fdt));
500 printf("version:\t\t%d\n", version);
501 printf("last_comp_version:\t%d\n",
502 fdt_last_comp_version(working_fdt));
503 if (version >= 2)
504 printf("boot_cpuid_phys:\t0x%x\n",
505 fdt_boot_cpuid_phys(working_fdt));
506 if (version >= 3)
507 printf("size_dt_strings:\t0x%x\n",
508 fdt_size_dt_strings(working_fdt));
509 if (version >= 17)
510 printf("size_dt_struct:\t\t0x%x\n",
511 fdt_size_dt_struct(working_fdt));
512 printf("number mem_rsv:\t\t0x%x\n",
513 fdt_num_mem_rsv(working_fdt));
514 printf("\n");
515
516 /*
517 * Set boot cpu id
518 */
519 } else if (strncmp(argv[1], "boo", 3) == 0) {
520 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
521 fdt_set_boot_cpuid_phys(working_fdt, tmp);
522
523 /*
524 * memory command
525 */
526 } else if (strncmp(argv[1], "me", 2) == 0) {
527 uint64_t addr, size;
528 int err;
529 addr = simple_strtoull(argv[2], NULL, 16);
530 size = simple_strtoull(argv[3], NULL, 16);
531 err = fdt_fixup_memory(working_fdt, addr, size);
532 if (err < 0)
533 return err;
534
535 /*
536 * mem reserve commands
537 */
538 } else if (strncmp(argv[1], "rs", 2) == 0) {
539 if (argv[2][0] == 'p') {
540 uint64_t addr, size;
541 int total = fdt_num_mem_rsv(working_fdt);
542 int j, err;
543 printf("index\t\t start\t\t size\n");
544 printf("-------------------------------"
545 "-----------------\n");
546 for (j = 0; j < total; j++) {
547 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
548 if (err < 0) {
549 printf("libfdt fdt_get_mem_rsv(): %s\n",
550 fdt_strerror(err));
551 return err;
552 }
553 printf(" %x\t%08x%08x\t%08x%08x\n", j,
554 (u32)(addr >> 32),
555 (u32)(addr & 0xffffffff),
556 (u32)(size >> 32),
557 (u32)(size & 0xffffffff));
558 }
559 } else if (argv[2][0] == 'a') {
560 uint64_t addr, size;
561 int err;
562 addr = simple_strtoull(argv[3], NULL, 16);
563 size = simple_strtoull(argv[4], NULL, 16);
564 err = fdt_add_mem_rsv(working_fdt, addr, size);
565
566 if (err < 0) {
567 printf("libfdt fdt_add_mem_rsv(): %s\n",
568 fdt_strerror(err));
569 return err;
570 }
571 } else if (argv[2][0] == 'd') {
572 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
573 int err = fdt_del_mem_rsv(working_fdt, idx);
574
575 if (err < 0) {
576 printf("libfdt fdt_del_mem_rsv(): %s\n",
577 fdt_strerror(err));
578 return err;
579 }
580 } else {
581 /* Unrecognized command */
582 return CMD_RET_USAGE;
583 }
584 }
585 #ifdef CONFIG_OF_BOARD_SETUP
586 /* Call the board-specific fixup routine */
587 else if (strncmp(argv[1], "boa", 3) == 0) {
588 int err = ft_board_setup(working_fdt, gd->bd);
589
590 if (err) {
591 printf("Failed to update board information in FDT: %s\n",
592 fdt_strerror(err));
593 return CMD_RET_FAILURE;
594 }
595 }
596 #endif
597 /* Create a chosen node */
598 else if (strncmp(argv[1], "cho", 3) == 0) {
599 unsigned long initrd_start = 0, initrd_end = 0;
600
601 if ((argc != 2) && (argc != 4))
602 return CMD_RET_USAGE;
603
604 if (argc == 4) {
605 initrd_start = simple_strtoul(argv[2], NULL, 16);
606 initrd_end = simple_strtoul(argv[3], NULL, 16);
607 }
608
609 fdt_chosen(working_fdt);
610 fdt_initrd(working_fdt, initrd_start, initrd_end);
611
612 #if defined(CONFIG_FIT_SIGNATURE)
613 } else if (strncmp(argv[1], "che", 3) == 0) {
614 int cfg_noffset;
615 int ret;
616 unsigned long addr;
617 struct fdt_header *blob;
618
619 if (!working_fdt)
620 return CMD_RET_FAILURE;
621
622 if (argc > 2) {
623 addr = simple_strtoul(argv[2], NULL, 16);
624 blob = map_sysmem(addr, 0);
625 } else {
626 blob = (struct fdt_header *)gd->fdt_blob;
627 }
628 if (!fdt_valid(&blob))
629 return 1;
630
631 gd->fdt_blob = blob;
632 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
633 if (!cfg_noffset) {
634 printf("Could not find configuration node: %s\n",
635 fdt_strerror(cfg_noffset));
636 return CMD_RET_FAILURE;
637 }
638
639 ret = fit_config_verify(working_fdt, cfg_noffset);
640 if (ret == 0)
641 return CMD_RET_SUCCESS;
642 else
643 return CMD_RET_FAILURE;
644 #endif
645
646 }
647 #ifdef CONFIG_OF_LIBFDT_OVERLAY
648 /* apply an overlay */
649 else if (strncmp(argv[1], "ap", 2) == 0) {
650 unsigned long addr;
651 struct fdt_header *blob;
652 int ret;
653
654 if (argc != 3)
655 return CMD_RET_USAGE;
656
657 if (!working_fdt)
658 return CMD_RET_FAILURE;
659
660 addr = simple_strtoul(argv[2], NULL, 16);
661 blob = map_sysmem(addr, 0);
662 if (!fdt_valid(&blob))
663 return CMD_RET_FAILURE;
664
665 ret = fdt_overlay_apply(working_fdt, blob);
666 if (ret) {
667 printf("fdt_overlay_apply(): %s\n", fdt_strerror(ret));
668 return CMD_RET_FAILURE;
669 }
670 }
671 #endif
672 /* resize the fdt */
673 else if (strncmp(argv[1], "re", 2) == 0) {
674 uint extrasize;
675 if (argc > 2)
676 extrasize = simple_strtoul(argv[2], NULL, 16);
677 else
678 extrasize = 0;
679 fdt_shrink_to_minimum(working_fdt, extrasize);
680 }
681 else {
682 /* Unrecognized command */
683 return CMD_RET_USAGE;
684 }
685
686 return 0;
687 }
688
689 /****************************************************************************/
690
691 /**
692 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
693 *
694 * @blobp: Pointer to FDT pointer
695 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
696 */
697 static int fdt_valid(struct fdt_header **blobp)
698 {
699 const void *blob = *blobp;
700 int err;
701
702 if (blob == NULL) {
703 printf ("The address of the fdt is invalid (NULL).\n");
704 return 0;
705 }
706
707 err = fdt_check_header(blob);
708 if (err == 0)
709 return 1; /* valid */
710
711 if (err < 0) {
712 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
713 /*
714 * Be more informative on bad version.
715 */
716 if (err == -FDT_ERR_BADVERSION) {
717 if (fdt_version(blob) <
718 FDT_FIRST_SUPPORTED_VERSION) {
719 printf (" - too old, fdt %d < %d",
720 fdt_version(blob),
721 FDT_FIRST_SUPPORTED_VERSION);
722 }
723 if (fdt_last_comp_version(blob) >
724 FDT_LAST_SUPPORTED_VERSION) {
725 printf (" - too new, fdt %d > %d",
726 fdt_version(blob),
727 FDT_LAST_SUPPORTED_VERSION);
728 }
729 }
730 printf("\n");
731 *blobp = NULL;
732 return 0;
733 }
734 return 1;
735 }
736
737 /****************************************************************************/
738
739 /*
740 * Parse the user's input, partially heuristic. Valid formats:
741 * <0x00112233 4 05> - an array of cells. Numbers follow standard
742 * C conventions.
743 * [00 11 22 .. nn] - byte stream
744 * "string" - If the the value doesn't start with "<" or "[", it is
745 * treated as a string. Note that the quotes are
746 * stripped by the parser before we get the string.
747 * newval: An array of strings containing the new property as specified
748 * on the command line
749 * count: The number of strings in the array
750 * data: A bytestream to be placed in the property
751 * len: The length of the resulting bytestream
752 */
753 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
754 {
755 char *cp; /* temporary char pointer */
756 char *newp; /* temporary newval char pointer */
757 unsigned long tmp; /* holds converted values */
758 int stridx = 0;
759
760 *len = 0;
761 newp = newval[0];
762
763 /* An array of cells */
764 if (*newp == '<') {
765 newp++;
766 while ((*newp != '>') && (stridx < count)) {
767 /*
768 * Keep searching until we find that last ">"
769 * That way users don't have to escape the spaces
770 */
771 if (*newp == '\0') {
772 newp = newval[++stridx];
773 continue;
774 }
775
776 cp = newp;
777 tmp = simple_strtoul(cp, &newp, 0);
778 if (*cp != '?')
779 *(fdt32_t *)data = cpu_to_fdt32(tmp);
780 else
781 newp++;
782
783 data += 4;
784 *len += 4;
785
786 /* If the ptr didn't advance, something went wrong */
787 if ((newp - cp) <= 0) {
788 printf("Sorry, I could not convert \"%s\"\n",
789 cp);
790 return 1;
791 }
792
793 while (*newp == ' ')
794 newp++;
795 }
796
797 if (*newp != '>') {
798 printf("Unexpected character '%c'\n", *newp);
799 return 1;
800 }
801 } else if (*newp == '[') {
802 /*
803 * Byte stream. Convert the values.
804 */
805 newp++;
806 while ((stridx < count) && (*newp != ']')) {
807 while (*newp == ' ')
808 newp++;
809 if (*newp == '\0') {
810 newp = newval[++stridx];
811 continue;
812 }
813 if (!isxdigit(*newp))
814 break;
815 tmp = simple_strtoul(newp, &newp, 16);
816 *data++ = tmp & 0xFF;
817 *len = *len + 1;
818 }
819 if (*newp != ']') {
820 printf("Unexpected character '%c'\n", *newp);
821 return 1;
822 }
823 } else {
824 /*
825 * Assume it is one or more strings. Copy it into our
826 * data area for convenience (including the
827 * terminating '\0's).
828 */
829 while (stridx < count) {
830 size_t length = strlen(newp) + 1;
831 strcpy(data, newp);
832 data += length;
833 *len += length;
834 newp = newval[++stridx];
835 }
836 }
837 return 0;
838 }
839
840 /****************************************************************************/
841
842 /*
843 * Heuristic to guess if this is a string or concatenated strings.
844 */
845
846 static int is_printable_string(const void *data, int len)
847 {
848 const char *s = data;
849
850 /* zero length is not */
851 if (len == 0)
852 return 0;
853
854 /* must terminate with zero or '\n' */
855 if (s[len - 1] != '\0' && s[len - 1] != '\n')
856 return 0;
857
858 /* printable or a null byte (concatenated strings) */
859 while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
860 /*
861 * If we see a null, there are three possibilities:
862 * 1) If len == 1, it is the end of the string, printable
863 * 2) Next character also a null, not printable.
864 * 3) Next character not a null, continue to check.
865 */
866 if (s[0] == '\0') {
867 if (len == 1)
868 return 1;
869 if (s[1] == '\0')
870 return 0;
871 }
872 s++;
873 len--;
874 }
875
876 /* Not the null termination, or not done yet: not printable */
877 if (*s != '\0' || (len != 0))
878 return 0;
879
880 return 1;
881 }
882
883
884 /*
885 * Print the property in the best format, a heuristic guess. Print as
886 * a string, concatenated strings, a byte, word, double word, or (if all
887 * else fails) it is printed as a stream of bytes.
888 */
889 static void print_data(const void *data, int len)
890 {
891 int j;
892
893 /* no data, don't print */
894 if (len == 0)
895 return;
896
897 /*
898 * It is a string, but it may have multiple strings (embedded '\0's).
899 */
900 if (is_printable_string(data, len)) {
901 puts("\"");
902 j = 0;
903 while (j < len) {
904 if (j > 0)
905 puts("\", \"");
906 puts(data);
907 j += strlen(data) + 1;
908 data += strlen(data) + 1;
909 }
910 puts("\"");
911 return;
912 }
913
914 if ((len %4) == 0) {
915 if (len > CMD_FDT_MAX_DUMP)
916 printf("* 0x%p [0x%08x]", data, len);
917 else {
918 const __be32 *p;
919
920 printf("<");
921 for (j = 0, p = data; j < len/4; j++)
922 printf("0x%08x%s", fdt32_to_cpu(p[j]),
923 j < (len/4 - 1) ? " " : "");
924 printf(">");
925 }
926 } else { /* anything else... hexdump */
927 if (len > CMD_FDT_MAX_DUMP)
928 printf("* 0x%p [0x%08x]", data, len);
929 else {
930 const u8 *s;
931
932 printf("[");
933 for (j = 0, s = data; j < len; j++)
934 printf("%02x%s", s[j], j < len - 1 ? " " : "");
935 printf("]");
936 }
937 }
938 }
939
940 /****************************************************************************/
941
942 /*
943 * Recursively print (a portion of) the working_fdt. The depth parameter
944 * determines how deeply nested the fdt is printed.
945 */
946 static int fdt_print(const char *pathp, char *prop, int depth)
947 {
948 static char tabs[MAX_LEVEL+1] =
949 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
950 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
951 const void *nodep; /* property node pointer */
952 int nodeoffset; /* node offset from libfdt */
953 int nextoffset; /* next node offset from libfdt */
954 uint32_t tag; /* tag */
955 int len; /* length of the property */
956 int level = 0; /* keep track of nesting level */
957 const struct fdt_property *fdt_prop;
958
959 nodeoffset = fdt_path_offset (working_fdt, pathp);
960 if (nodeoffset < 0) {
961 /*
962 * Not found or something else bad happened.
963 */
964 printf ("libfdt fdt_path_offset() returned %s\n",
965 fdt_strerror(nodeoffset));
966 return 1;
967 }
968 /*
969 * The user passed in a property as well as node path.
970 * Print only the given property and then return.
971 */
972 if (prop) {
973 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
974 if (len == 0) {
975 /* no property value */
976 printf("%s %s\n", pathp, prop);
977 return 0;
978 } else if (nodep && len > 0) {
979 printf("%s = ", prop);
980 print_data (nodep, len);
981 printf("\n");
982 return 0;
983 } else {
984 printf ("libfdt fdt_getprop(): %s\n",
985 fdt_strerror(len));
986 return 1;
987 }
988 }
989
990 /*
991 * The user passed in a node path and no property,
992 * print the node and all subnodes.
993 */
994 while(level >= 0) {
995 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
996 switch(tag) {
997 case FDT_BEGIN_NODE:
998 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
999 if (level <= depth) {
1000 if (pathp == NULL)
1001 pathp = "/* NULL pointer error */";
1002 if (*pathp == '\0')
1003 pathp = "/"; /* root is nameless */
1004 printf("%s%s {\n",
1005 &tabs[MAX_LEVEL - level], pathp);
1006 }
1007 level++;
1008 if (level >= MAX_LEVEL) {
1009 printf("Nested too deep, aborting.\n");
1010 return 1;
1011 }
1012 break;
1013 case FDT_END_NODE:
1014 level--;
1015 if (level <= depth)
1016 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1017 if (level == 0) {
1018 level = -1; /* exit the loop */
1019 }
1020 break;
1021 case FDT_PROP:
1022 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1023 sizeof(*fdt_prop));
1024 pathp = fdt_string(working_fdt,
1025 fdt32_to_cpu(fdt_prop->nameoff));
1026 len = fdt32_to_cpu(fdt_prop->len);
1027 nodep = fdt_prop->data;
1028 if (len < 0) {
1029 printf ("libfdt fdt_getprop(): %s\n",
1030 fdt_strerror(len));
1031 return 1;
1032 } else if (len == 0) {
1033 /* the property has no value */
1034 if (level <= depth)
1035 printf("%s%s;\n",
1036 &tabs[MAX_LEVEL - level],
1037 pathp);
1038 } else {
1039 if (level <= depth) {
1040 printf("%s%s = ",
1041 &tabs[MAX_LEVEL - level],
1042 pathp);
1043 print_data (nodep, len);
1044 printf(";\n");
1045 }
1046 }
1047 break;
1048 case FDT_NOP:
1049 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1050 break;
1051 case FDT_END:
1052 return 1;
1053 default:
1054 if (level <= depth)
1055 printf("Unknown tag 0x%08X\n", tag);
1056 return 1;
1057 }
1058 nodeoffset = nextoffset;
1059 }
1060 return 0;
1061 }
1062
1063 /********************************************************************/
1064 #ifdef CONFIG_SYS_LONGHELP
1065 static char fdt_help_text[] =
1066 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1067 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1068 "fdt apply <addr> - Apply overlay to the DT\n"
1069 #endif
1070 #ifdef CONFIG_OF_BOARD_SETUP
1071 "fdt boardsetup - Do board-specific set up\n"
1072 #endif
1073 #ifdef CONFIG_OF_SYSTEM_SETUP
1074 "fdt systemsetup - Do system-specific set up\n"
1075 #endif
1076 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1077 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1078 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1079 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1080 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1081 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1082 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1083 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1084 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1085 "fdt mknode <path> <node> - Create a new node after <path>\n"
1086 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1087 "fdt header - Display header info\n"
1088 "fdt bootcpu <id> - Set boot cpuid\n"
1089 "fdt memory <addr> <size> - Add/Update memory node\n"
1090 "fdt rsvmem print - Show current mem reserves\n"
1091 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1092 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1093 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1094 " <start>/<end> - initrd start/end addr\n"
1095 #if defined(CONFIG_FIT_SIGNATURE)
1096 "fdt checksign [<addr>] - check FIT signature\n"
1097 " <start> - addr of key blob\n"
1098 " default gd->fdt_blob\n"
1099 #endif
1100 "NOTE: Dereference aliases by omitting the leading '/', "
1101 "e.g. fdt print ethernet0.";
1102 #endif
1103
1104 U_BOOT_CMD(
1105 fdt, 255, 0, do_fdt,
1106 "flattened device tree utility commands", fdt_help_text
1107 );
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