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