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env: Rename common functions related to setenv()
[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 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 (!ptmp) {
288 printf("prop (%s) not found!\n", prop);
289 return 1;
290 }
291 if (len > SCRATCHPAD) {
292 printf("prop (%d) doesn't fit in scratchpad!\n",
293 len);
294 return 1;
295 }
296 memcpy(data, ptmp, len);
297 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
298 if (ret != 0)
299 return ret;
300 }
301
302 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
303 if (ret < 0) {
304 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
305 return 1;
306 }
307
308 /********************************************************************
309 * Get the value of a property in the working_fdt.
310 ********************************************************************/
311 } else if (argv[1][0] == 'g') {
312 char *subcmd; /* sub-command */
313 char *pathp; /* path */
314 char *prop; /* property */
315 char *var; /* variable to store result */
316 int nodeoffset; /* node offset from libfdt */
317 const void *nodep; /* property node pointer */
318 int len = 0; /* new length of the property */
319
320 /*
321 * Parameters: Node path, property, optional value.
322 */
323 if (argc < 5)
324 return CMD_RET_USAGE;
325
326 subcmd = argv[2];
327
328 if (argc < 6 && subcmd[0] != 's')
329 return CMD_RET_USAGE;
330
331 var = argv[3];
332 pathp = argv[4];
333 prop = argv[5];
334
335 nodeoffset = fdt_path_offset(working_fdt, pathp);
336 if (nodeoffset < 0) {
337 /*
338 * Not found or something else bad happened.
339 */
340 printf("libfdt fdt_path_offset() returned %s\n",
341 fdt_strerror(nodeoffset));
342 return 1;
343 }
344
345 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
346 int reqIndex = -1;
347 int startDepth = fdt_node_depth(
348 working_fdt, nodeoffset);
349 int curDepth = startDepth;
350 int curIndex = -1;
351 int nextNodeOffset = fdt_next_node(
352 working_fdt, nodeoffset, &curDepth);
353
354 if (subcmd[0] == 'n')
355 reqIndex = simple_strtoul(argv[5], NULL, 16);
356
357 while (curDepth > startDepth) {
358 if (curDepth == startDepth + 1)
359 curIndex++;
360 if (subcmd[0] == 'n' && curIndex == reqIndex) {
361 const char *node_name;
362
363 node_name = fdt_get_name(working_fdt,
364 nextNodeOffset,
365 NULL);
366 env_set(var, node_name);
367 return 0;
368 }
369 nextNodeOffset = fdt_next_node(
370 working_fdt, nextNodeOffset, &curDepth);
371 if (nextNodeOffset < 0)
372 break;
373 }
374 if (subcmd[0] == 's') {
375 /* get the num nodes at this level */
376 env_set_ulong(var, curIndex + 1);
377 } else {
378 /* node index not found */
379 printf("libfdt node not found\n");
380 return 1;
381 }
382 } else {
383 nodep = fdt_getprop(
384 working_fdt, nodeoffset, prop, &len);
385 if (len == 0) {
386 /* no property value */
387 env_set(var, "");
388 return 0;
389 } else if (nodep && len > 0) {
390 if (subcmd[0] == 'v') {
391 int ret;
392
393 ret = fdt_value_env_set(nodep, len,
394 var);
395 if (ret != 0)
396 return ret;
397 } else if (subcmd[0] == 'a') {
398 /* Get address */
399 char buf[11];
400
401 sprintf(buf, "0x%p", nodep);
402 env_set(var, buf);
403 } else if (subcmd[0] == 's') {
404 /* Get size */
405 char buf[11];
406
407 sprintf(buf, "0x%08X", len);
408 env_set(var, buf);
409 } else
410 return CMD_RET_USAGE;
411 return 0;
412 } else {
413 printf("libfdt fdt_getprop(): %s\n",
414 fdt_strerror(len));
415 return 1;
416 }
417 }
418
419 /*
420 * Print (recursive) / List (single level)
421 */
422 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
423 int depth = MAX_LEVEL; /* how deep to print */
424 char *pathp; /* path */
425 char *prop; /* property */
426 int ret; /* return value */
427 static char root[2] = "/";
428
429 /*
430 * list is an alias for print, but limited to 1 level
431 */
432 if (argv[1][0] == 'l') {
433 depth = 1;
434 }
435
436 /*
437 * Get the starting path. The root node is an oddball,
438 * the offset is zero and has no name.
439 */
440 if (argc == 2)
441 pathp = root;
442 else
443 pathp = argv[2];
444 if (argc > 3)
445 prop = argv[3];
446 else
447 prop = NULL;
448
449 ret = fdt_print(pathp, prop, depth);
450 if (ret != 0)
451 return ret;
452
453 /*
454 * Remove a property/node
455 */
456 } else if (strncmp(argv[1], "rm", 2) == 0) {
457 int nodeoffset; /* node offset from libfdt */
458 int err;
459
460 /*
461 * Get the path. The root node is an oddball, the offset
462 * is zero and has no name.
463 */
464 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
465 if (nodeoffset < 0) {
466 /*
467 * Not found or something else bad happened.
468 */
469 printf ("libfdt fdt_path_offset() returned %s\n",
470 fdt_strerror(nodeoffset));
471 return 1;
472 }
473 /*
474 * Do the delete. A fourth parameter means delete a property,
475 * otherwise delete the node.
476 */
477 if (argc > 3) {
478 err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
479 if (err < 0) {
480 printf("libfdt fdt_delprop(): %s\n",
481 fdt_strerror(err));
482 return err;
483 }
484 } else {
485 err = fdt_del_node(working_fdt, nodeoffset);
486 if (err < 0) {
487 printf("libfdt fdt_del_node(): %s\n",
488 fdt_strerror(err));
489 return err;
490 }
491 }
492
493 /*
494 * Display header info
495 */
496 } else if (argv[1][0] == 'h') {
497 u32 version = fdt_version(working_fdt);
498 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
499 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
500 fdt_totalsize(working_fdt));
501 printf("off_dt_struct:\t\t0x%x\n",
502 fdt_off_dt_struct(working_fdt));
503 printf("off_dt_strings:\t\t0x%x\n",
504 fdt_off_dt_strings(working_fdt));
505 printf("off_mem_rsvmap:\t\t0x%x\n",
506 fdt_off_mem_rsvmap(working_fdt));
507 printf("version:\t\t%d\n", version);
508 printf("last_comp_version:\t%d\n",
509 fdt_last_comp_version(working_fdt));
510 if (version >= 2)
511 printf("boot_cpuid_phys:\t0x%x\n",
512 fdt_boot_cpuid_phys(working_fdt));
513 if (version >= 3)
514 printf("size_dt_strings:\t0x%x\n",
515 fdt_size_dt_strings(working_fdt));
516 if (version >= 17)
517 printf("size_dt_struct:\t\t0x%x\n",
518 fdt_size_dt_struct(working_fdt));
519 printf("number mem_rsv:\t\t0x%x\n",
520 fdt_num_mem_rsv(working_fdt));
521 printf("\n");
522
523 /*
524 * Set boot cpu id
525 */
526 } else if (strncmp(argv[1], "boo", 3) == 0) {
527 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
528 fdt_set_boot_cpuid_phys(working_fdt, tmp);
529
530 /*
531 * memory command
532 */
533 } else if (strncmp(argv[1], "me", 2) == 0) {
534 uint64_t addr, size;
535 int err;
536 addr = simple_strtoull(argv[2], NULL, 16);
537 size = simple_strtoull(argv[3], NULL, 16);
538 err = fdt_fixup_memory(working_fdt, addr, size);
539 if (err < 0)
540 return err;
541
542 /*
543 * mem reserve commands
544 */
545 } else if (strncmp(argv[1], "rs", 2) == 0) {
546 if (argv[2][0] == 'p') {
547 uint64_t addr, size;
548 int total = fdt_num_mem_rsv(working_fdt);
549 int j, err;
550 printf("index\t\t start\t\t size\n");
551 printf("-------------------------------"
552 "-----------------\n");
553 for (j = 0; j < total; j++) {
554 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
555 if (err < 0) {
556 printf("libfdt fdt_get_mem_rsv(): %s\n",
557 fdt_strerror(err));
558 return err;
559 }
560 printf(" %x\t%08x%08x\t%08x%08x\n", j,
561 (u32)(addr >> 32),
562 (u32)(addr & 0xffffffff),
563 (u32)(size >> 32),
564 (u32)(size & 0xffffffff));
565 }
566 } else if (argv[2][0] == 'a') {
567 uint64_t addr, size;
568 int err;
569 addr = simple_strtoull(argv[3], NULL, 16);
570 size = simple_strtoull(argv[4], NULL, 16);
571 err = fdt_add_mem_rsv(working_fdt, addr, size);
572
573 if (err < 0) {
574 printf("libfdt fdt_add_mem_rsv(): %s\n",
575 fdt_strerror(err));
576 return err;
577 }
578 } else if (argv[2][0] == 'd') {
579 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
580 int err = fdt_del_mem_rsv(working_fdt, idx);
581
582 if (err < 0) {
583 printf("libfdt fdt_del_mem_rsv(): %s\n",
584 fdt_strerror(err));
585 return err;
586 }
587 } else {
588 /* Unrecognized command */
589 return CMD_RET_USAGE;
590 }
591 }
592 #ifdef CONFIG_OF_BOARD_SETUP
593 /* Call the board-specific fixup routine */
594 else if (strncmp(argv[1], "boa", 3) == 0) {
595 int err = ft_board_setup(working_fdt, gd->bd);
596
597 if (err) {
598 printf("Failed to update board information in FDT: %s\n",
599 fdt_strerror(err));
600 return CMD_RET_FAILURE;
601 }
602 }
603 #endif
604 /* Create a chosen node */
605 else if (strncmp(argv[1], "cho", 3) == 0) {
606 unsigned long initrd_start = 0, initrd_end = 0;
607
608 if ((argc != 2) && (argc != 4))
609 return CMD_RET_USAGE;
610
611 if (argc == 4) {
612 initrd_start = simple_strtoul(argv[2], NULL, 16);
613 initrd_end = simple_strtoul(argv[3], NULL, 16);
614 }
615
616 fdt_chosen(working_fdt);
617 fdt_initrd(working_fdt, initrd_start, initrd_end);
618
619 #if defined(CONFIG_FIT_SIGNATURE)
620 } else if (strncmp(argv[1], "che", 3) == 0) {
621 int cfg_noffset;
622 int ret;
623 unsigned long addr;
624 struct fdt_header *blob;
625
626 if (!working_fdt)
627 return CMD_RET_FAILURE;
628
629 if (argc > 2) {
630 addr = simple_strtoul(argv[2], NULL, 16);
631 blob = map_sysmem(addr, 0);
632 } else {
633 blob = (struct fdt_header *)gd->fdt_blob;
634 }
635 if (!fdt_valid(&blob))
636 return 1;
637
638 gd->fdt_blob = blob;
639 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
640 if (!cfg_noffset) {
641 printf("Could not find configuration node: %s\n",
642 fdt_strerror(cfg_noffset));
643 return CMD_RET_FAILURE;
644 }
645
646 ret = fit_config_verify(working_fdt, cfg_noffset);
647 if (ret == 0)
648 return CMD_RET_SUCCESS;
649 else
650 return CMD_RET_FAILURE;
651 #endif
652
653 }
654 #ifdef CONFIG_OF_LIBFDT_OVERLAY
655 /* apply an overlay */
656 else if (strncmp(argv[1], "ap", 2) == 0) {
657 unsigned long addr;
658 struct fdt_header *blob;
659 int ret;
660
661 if (argc != 3)
662 return CMD_RET_USAGE;
663
664 if (!working_fdt)
665 return CMD_RET_FAILURE;
666
667 addr = simple_strtoul(argv[2], NULL, 16);
668 blob = map_sysmem(addr, 0);
669 if (!fdt_valid(&blob))
670 return CMD_RET_FAILURE;
671
672 ret = fdt_overlay_apply(working_fdt, blob);
673 if (ret) {
674 printf("fdt_overlay_apply(): %s\n", fdt_strerror(ret));
675 return CMD_RET_FAILURE;
676 }
677 }
678 #endif
679 /* resize the fdt */
680 else if (strncmp(argv[1], "re", 2) == 0) {
681 uint extrasize;
682 if (argc > 2)
683 extrasize = simple_strtoul(argv[2], NULL, 16);
684 else
685 extrasize = 0;
686 fdt_shrink_to_minimum(working_fdt, extrasize);
687 }
688 else {
689 /* Unrecognized command */
690 return CMD_RET_USAGE;
691 }
692
693 return 0;
694 }
695
696 /****************************************************************************/
697
698 /**
699 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
700 *
701 * @blobp: Pointer to FDT pointer
702 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
703 */
704 static int fdt_valid(struct fdt_header **blobp)
705 {
706 const void *blob = *blobp;
707 int err;
708
709 if (blob == NULL) {
710 printf ("The address of the fdt is invalid (NULL).\n");
711 return 0;
712 }
713
714 err = fdt_check_header(blob);
715 if (err == 0)
716 return 1; /* valid */
717
718 if (err < 0) {
719 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
720 /*
721 * Be more informative on bad version.
722 */
723 if (err == -FDT_ERR_BADVERSION) {
724 if (fdt_version(blob) <
725 FDT_FIRST_SUPPORTED_VERSION) {
726 printf (" - too old, fdt %d < %d",
727 fdt_version(blob),
728 FDT_FIRST_SUPPORTED_VERSION);
729 }
730 if (fdt_last_comp_version(blob) >
731 FDT_LAST_SUPPORTED_VERSION) {
732 printf (" - too new, fdt %d > %d",
733 fdt_version(blob),
734 FDT_LAST_SUPPORTED_VERSION);
735 }
736 }
737 printf("\n");
738 *blobp = NULL;
739 return 0;
740 }
741 return 1;
742 }
743
744 /****************************************************************************/
745
746 /*
747 * Parse the user's input, partially heuristic. Valid formats:
748 * <0x00112233 4 05> - an array of cells. Numbers follow standard
749 * C conventions.
750 * [00 11 22 .. nn] - byte stream
751 * "string" - If the the value doesn't start with "<" or "[", it is
752 * treated as a string. Note that the quotes are
753 * stripped by the parser before we get the string.
754 * newval: An array of strings containing the new property as specified
755 * on the command line
756 * count: The number of strings in the array
757 * data: A bytestream to be placed in the property
758 * len: The length of the resulting bytestream
759 */
760 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
761 {
762 char *cp; /* temporary char pointer */
763 char *newp; /* temporary newval char pointer */
764 unsigned long tmp; /* holds converted values */
765 int stridx = 0;
766
767 *len = 0;
768 newp = newval[0];
769
770 /* An array of cells */
771 if (*newp == '<') {
772 newp++;
773 while ((*newp != '>') && (stridx < count)) {
774 /*
775 * Keep searching until we find that last ">"
776 * That way users don't have to escape the spaces
777 */
778 if (*newp == '\0') {
779 newp = newval[++stridx];
780 continue;
781 }
782
783 cp = newp;
784 tmp = simple_strtoul(cp, &newp, 0);
785 if (*cp != '?')
786 *(fdt32_t *)data = cpu_to_fdt32(tmp);
787 else
788 newp++;
789
790 data += 4;
791 *len += 4;
792
793 /* If the ptr didn't advance, something went wrong */
794 if ((newp - cp) <= 0) {
795 printf("Sorry, I could not convert \"%s\"\n",
796 cp);
797 return 1;
798 }
799
800 while (*newp == ' ')
801 newp++;
802 }
803
804 if (*newp != '>') {
805 printf("Unexpected character '%c'\n", *newp);
806 return 1;
807 }
808 } else if (*newp == '[') {
809 /*
810 * Byte stream. Convert the values.
811 */
812 newp++;
813 while ((stridx < count) && (*newp != ']')) {
814 while (*newp == ' ')
815 newp++;
816 if (*newp == '\0') {
817 newp = newval[++stridx];
818 continue;
819 }
820 if (!isxdigit(*newp))
821 break;
822 tmp = simple_strtoul(newp, &newp, 16);
823 *data++ = tmp & 0xFF;
824 *len = *len + 1;
825 }
826 if (*newp != ']') {
827 printf("Unexpected character '%c'\n", *newp);
828 return 1;
829 }
830 } else {
831 /*
832 * Assume it is one or more strings. Copy it into our
833 * data area for convenience (including the
834 * terminating '\0's).
835 */
836 while (stridx < count) {
837 size_t length = strlen(newp) + 1;
838 strcpy(data, newp);
839 data += length;
840 *len += length;
841 newp = newval[++stridx];
842 }
843 }
844 return 0;
845 }
846
847 /****************************************************************************/
848
849 /*
850 * Heuristic to guess if this is a string or concatenated strings.
851 */
852
853 static int is_printable_string(const void *data, int len)
854 {
855 const char *s = data;
856
857 /* zero length is not */
858 if (len == 0)
859 return 0;
860
861 /* must terminate with zero or '\n' */
862 if (s[len - 1] != '\0' && s[len - 1] != '\n')
863 return 0;
864
865 /* printable or a null byte (concatenated strings) */
866 while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
867 /*
868 * If we see a null, there are three possibilities:
869 * 1) If len == 1, it is the end of the string, printable
870 * 2) Next character also a null, not printable.
871 * 3) Next character not a null, continue to check.
872 */
873 if (s[0] == '\0') {
874 if (len == 1)
875 return 1;
876 if (s[1] == '\0')
877 return 0;
878 }
879 s++;
880 len--;
881 }
882
883 /* Not the null termination, or not done yet: not printable */
884 if (*s != '\0' || (len != 0))
885 return 0;
886
887 return 1;
888 }
889
890
891 /*
892 * Print the property in the best format, a heuristic guess. Print as
893 * a string, concatenated strings, a byte, word, double word, or (if all
894 * else fails) it is printed as a stream of bytes.
895 */
896 static void print_data(const void *data, int len)
897 {
898 int j;
899
900 /* no data, don't print */
901 if (len == 0)
902 return;
903
904 /*
905 * It is a string, but it may have multiple strings (embedded '\0's).
906 */
907 if (is_printable_string(data, len)) {
908 puts("\"");
909 j = 0;
910 while (j < len) {
911 if (j > 0)
912 puts("\", \"");
913 puts(data);
914 j += strlen(data) + 1;
915 data += strlen(data) + 1;
916 }
917 puts("\"");
918 return;
919 }
920
921 if ((len %4) == 0) {
922 if (len > CMD_FDT_MAX_DUMP)
923 printf("* 0x%p [0x%08x]", data, len);
924 else {
925 const __be32 *p;
926
927 printf("<");
928 for (j = 0, p = data; j < len/4; j++)
929 printf("0x%08x%s", fdt32_to_cpu(p[j]),
930 j < (len/4 - 1) ? " " : "");
931 printf(">");
932 }
933 } else { /* anything else... hexdump */
934 if (len > CMD_FDT_MAX_DUMP)
935 printf("* 0x%p [0x%08x]", data, len);
936 else {
937 const u8 *s;
938
939 printf("[");
940 for (j = 0, s = data; j < len; j++)
941 printf("%02x%s", s[j], j < len - 1 ? " " : "");
942 printf("]");
943 }
944 }
945 }
946
947 /****************************************************************************/
948
949 /*
950 * Recursively print (a portion of) the working_fdt. The depth parameter
951 * determines how deeply nested the fdt is printed.
952 */
953 static int fdt_print(const char *pathp, char *prop, int depth)
954 {
955 static char tabs[MAX_LEVEL+1] =
956 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
957 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
958 const void *nodep; /* property node pointer */
959 int nodeoffset; /* node offset from libfdt */
960 int nextoffset; /* next node offset from libfdt */
961 uint32_t tag; /* tag */
962 int len; /* length of the property */
963 int level = 0; /* keep track of nesting level */
964 const struct fdt_property *fdt_prop;
965
966 nodeoffset = fdt_path_offset (working_fdt, pathp);
967 if (nodeoffset < 0) {
968 /*
969 * Not found or something else bad happened.
970 */
971 printf ("libfdt fdt_path_offset() returned %s\n",
972 fdt_strerror(nodeoffset));
973 return 1;
974 }
975 /*
976 * The user passed in a property as well as node path.
977 * Print only the given property and then return.
978 */
979 if (prop) {
980 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
981 if (len == 0) {
982 /* no property value */
983 printf("%s %s\n", pathp, prop);
984 return 0;
985 } else if (nodep && len > 0) {
986 printf("%s = ", prop);
987 print_data (nodep, len);
988 printf("\n");
989 return 0;
990 } else {
991 printf ("libfdt fdt_getprop(): %s\n",
992 fdt_strerror(len));
993 return 1;
994 }
995 }
996
997 /*
998 * The user passed in a node path and no property,
999 * print the node and all subnodes.
1000 */
1001 while(level >= 0) {
1002 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1003 switch(tag) {
1004 case FDT_BEGIN_NODE:
1005 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1006 if (level <= depth) {
1007 if (pathp == NULL)
1008 pathp = "/* NULL pointer error */";
1009 if (*pathp == '\0')
1010 pathp = "/"; /* root is nameless */
1011 printf("%s%s {\n",
1012 &tabs[MAX_LEVEL - level], pathp);
1013 }
1014 level++;
1015 if (level >= MAX_LEVEL) {
1016 printf("Nested too deep, aborting.\n");
1017 return 1;
1018 }
1019 break;
1020 case FDT_END_NODE:
1021 level--;
1022 if (level <= depth)
1023 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1024 if (level == 0) {
1025 level = -1; /* exit the loop */
1026 }
1027 break;
1028 case FDT_PROP:
1029 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1030 sizeof(*fdt_prop));
1031 pathp = fdt_string(working_fdt,
1032 fdt32_to_cpu(fdt_prop->nameoff));
1033 len = fdt32_to_cpu(fdt_prop->len);
1034 nodep = fdt_prop->data;
1035 if (len < 0) {
1036 printf ("libfdt fdt_getprop(): %s\n",
1037 fdt_strerror(len));
1038 return 1;
1039 } else if (len == 0) {
1040 /* the property has no value */
1041 if (level <= depth)
1042 printf("%s%s;\n",
1043 &tabs[MAX_LEVEL - level],
1044 pathp);
1045 } else {
1046 if (level <= depth) {
1047 printf("%s%s = ",
1048 &tabs[MAX_LEVEL - level],
1049 pathp);
1050 print_data (nodep, len);
1051 printf(";\n");
1052 }
1053 }
1054 break;
1055 case FDT_NOP:
1056 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1057 break;
1058 case FDT_END:
1059 return 1;
1060 default:
1061 if (level <= depth)
1062 printf("Unknown tag 0x%08X\n", tag);
1063 return 1;
1064 }
1065 nodeoffset = nextoffset;
1066 }
1067 return 0;
1068 }
1069
1070 /********************************************************************/
1071 #ifdef CONFIG_SYS_LONGHELP
1072 static char fdt_help_text[] =
1073 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1074 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1075 "fdt apply <addr> - Apply overlay to the DT\n"
1076 #endif
1077 #ifdef CONFIG_OF_BOARD_SETUP
1078 "fdt boardsetup - Do board-specific set up\n"
1079 #endif
1080 #ifdef CONFIG_OF_SYSTEM_SETUP
1081 "fdt systemsetup - Do system-specific set up\n"
1082 #endif
1083 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1084 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1085 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1086 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1087 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1088 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1089 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1090 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1091 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1092 "fdt mknode <path> <node> - Create a new node after <path>\n"
1093 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1094 "fdt header - Display header info\n"
1095 "fdt bootcpu <id> - Set boot cpuid\n"
1096 "fdt memory <addr> <size> - Add/Update memory node\n"
1097 "fdt rsvmem print - Show current mem reserves\n"
1098 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1099 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1100 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1101 " <start>/<end> - initrd start/end addr\n"
1102 #if defined(CONFIG_FIT_SIGNATURE)
1103 "fdt checksign [<addr>] - check FIT signature\n"
1104 " <start> - addr of key blob\n"
1105 " default gd->fdt_blob\n"
1106 #endif
1107 "NOTE: Dereference aliases by omitting the leading '/', "
1108 "e.g. fdt print ethernet0.";
1109 #endif
1110
1111 U_BOOT_CMD(
1112 fdt, 255, 0, do_fdt,
1113 "flattened device tree utility commands", fdt_help_text
1114 );
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