]> git.ipfire.org Git - people/ms/u-boot.git/blob - cmd/fdt.c
projects / people / ms / u-boot.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge git://git.denx.de/u-boot-dm
[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 (!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 *nodeName = fdt_get_name(
362 working_fdt, nextNodeOffset, NULL);
363
364 setenv(var, (char *)nodeName);
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 setenv_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 setenv(var, "");
386 return 0;
387 } else if (nodep && len > 0) {
388 if (subcmd[0] == 'v') {
389 int ret;
390
391 ret = fdt_value_setenv(nodep, len, 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 setenv(var, buf);
400 } else if (subcmd[0] == 's') {
401 /* Get size */
402 char buf[11];
403
404 sprintf(buf, "0x%08X", len);
405 setenv(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 ret = fdt_overlay_apply(working_fdt, blob);
670 if (ret) {
671 printf("fdt_overlay_apply(): %s\n", fdt_strerror(ret));
672 return CMD_RET_FAILURE;
673 }
674 }
675 #endif
676 /* resize the fdt */
677 else if (strncmp(argv[1], "re", 2) == 0) {
678 uint extrasize;
679 if (argc > 2)
680 extrasize = simple_strtoul(argv[2], NULL, 16);
681 else
682 extrasize = 0;
683 fdt_shrink_to_minimum(working_fdt, extrasize);
684 }
685 else {
686 /* Unrecognized command */
687 return CMD_RET_USAGE;
688 }
689
690 return 0;
691 }
692
693 /****************************************************************************/
694
695 /**
696 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
697 *
698 * @blobp: Pointer to FDT pointer
699 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
700 */
701 static int fdt_valid(struct fdt_header **blobp)
702 {
703 const void *blob = *blobp;
704 int err;
705
706 if (blob == NULL) {
707 printf ("The address of the fdt is invalid (NULL).\n");
708 return 0;
709 }
710
711 err = fdt_check_header(blob);
712 if (err == 0)
713 return 1; /* valid */
714
715 if (err < 0) {
716 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
717 /*
718 * Be more informative on bad version.
719 */
720 if (err == -FDT_ERR_BADVERSION) {
721 if (fdt_version(blob) <
722 FDT_FIRST_SUPPORTED_VERSION) {
723 printf (" - too old, fdt %d < %d",
724 fdt_version(blob),
725 FDT_FIRST_SUPPORTED_VERSION);
726 }
727 if (fdt_last_comp_version(blob) >
728 FDT_LAST_SUPPORTED_VERSION) {
729 printf (" - too new, fdt %d > %d",
730 fdt_version(blob),
731 FDT_LAST_SUPPORTED_VERSION);
732 }
733 }
734 printf("\n");
735 *blobp = NULL;
736 return 0;
737 }
738 return 1;
739 }
740
741 /****************************************************************************/
742
743 /*
744 * Parse the user's input, partially heuristic. Valid formats:
745 * <0x00112233 4 05> - an array of cells. Numbers follow standard
746 * C conventions.
747 * [00 11 22 .. nn] - byte stream
748 * "string" - If the the value doesn't start with "<" or "[", it is
749 * treated as a string. Note that the quotes are
750 * stripped by the parser before we get the string.
751 * newval: An array of strings containing the new property as specified
752 * on the command line
753 * count: The number of strings in the array
754 * data: A bytestream to be placed in the property
755 * len: The length of the resulting bytestream
756 */
757 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
758 {
759 char *cp; /* temporary char pointer */
760 char *newp; /* temporary newval char pointer */
761 unsigned long tmp; /* holds converted values */
762 int stridx = 0;
763
764 *len = 0;
765 newp = newval[0];
766
767 /* An array of cells */
768 if (*newp == '<') {
769 newp++;
770 while ((*newp != '>') && (stridx < count)) {
771 /*
772 * Keep searching until we find that last ">"
773 * That way users don't have to escape the spaces
774 */
775 if (*newp == '\0') {
776 newp = newval[++stridx];
777 continue;
778 }
779
780 cp = newp;
781 tmp = simple_strtoul(cp, &newp, 0);
782 if (*cp != '?')
783 *(fdt32_t *)data = cpu_to_fdt32(tmp);
784 else
785 newp++;
786
787 data += 4;
788 *len += 4;
789
790 /* If the ptr didn't advance, something went wrong */
791 if ((newp - cp) <= 0) {
792 printf("Sorry, I could not convert \"%s\"\n",
793 cp);
794 return 1;
795 }
796
797 while (*newp == ' ')
798 newp++;
799 }
800
801 if (*newp != '>') {
802 printf("Unexpected character '%c'\n", *newp);
803 return 1;
804 }
805 } else if (*newp == '[') {
806 /*
807 * Byte stream. Convert the values.
808 */
809 newp++;
810 while ((stridx < count) && (*newp != ']')) {
811 while (*newp == ' ')
812 newp++;
813 if (*newp == '\0') {
814 newp = newval[++stridx];
815 continue;
816 }
817 if (!isxdigit(*newp))
818 break;
819 tmp = simple_strtoul(newp, &newp, 16);
820 *data++ = tmp & 0xFF;
821 *len = *len + 1;
822 }
823 if (*newp != ']') {
824 printf("Unexpected character '%c'\n", *newp);
825 return 1;
826 }
827 } else {
828 /*
829 * Assume it is one or more strings. Copy it into our
830 * data area for convenience (including the
831 * terminating '\0's).
832 */
833 while (stridx < count) {
834 size_t length = strlen(newp) + 1;
835 strcpy(data, newp);
836 data += length;
837 *len += length;
838 newp = newval[++stridx];
839 }
840 }
841 return 0;
842 }
843
844 /****************************************************************************/
845
846 /*
847 * Heuristic to guess if this is a string or concatenated strings.
848 */
849
850 static int is_printable_string(const void *data, int len)
851 {
852 const char *s = data;
853
854 /* zero length is not */
855 if (len == 0)
856 return 0;
857
858 /* must terminate with zero or '\n' */
859 if (s[len - 1] != '\0' && s[len - 1] != '\n')
860 return 0;
861
862 /* printable or a null byte (concatenated strings) */
863 while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
864 /*
865 * If we see a null, there are three possibilities:
866 * 1) If len == 1, it is the end of the string, printable
867 * 2) Next character also a null, not printable.
868 * 3) Next character not a null, continue to check.
869 */
870 if (s[0] == '\0') {
871 if (len == 1)
872 return 1;
873 if (s[1] == '\0')
874 return 0;
875 }
876 s++;
877 len--;
878 }
879
880 /* Not the null termination, or not done yet: not printable */
881 if (*s != '\0' || (len != 0))
882 return 0;
883
884 return 1;
885 }
886
887
888 /*
889 * Print the property in the best format, a heuristic guess. Print as
890 * a string, concatenated strings, a byte, word, double word, or (if all
891 * else fails) it is printed as a stream of bytes.
892 */
893 static void print_data(const void *data, int len)
894 {
895 int j;
896
897 /* no data, don't print */
898 if (len == 0)
899 return;
900
901 /*
902 * It is a string, but it may have multiple strings (embedded '\0's).
903 */
904 if (is_printable_string(data, len)) {
905 puts("\"");
906 j = 0;
907 while (j < len) {
908 if (j > 0)
909 puts("\", \"");
910 puts(data);
911 j += strlen(data) + 1;
912 data += strlen(data) + 1;
913 }
914 puts("\"");
915 return;
916 }
917
918 if ((len %4) == 0) {
919 if (len > CMD_FDT_MAX_DUMP)
920 printf("* 0x%p [0x%08x]", data, len);
921 else {
922 const __be32 *p;
923
924 printf("<");
925 for (j = 0, p = data; j < len/4; j++)
926 printf("0x%08x%s", fdt32_to_cpu(p[j]),
927 j < (len/4 - 1) ? " " : "");
928 printf(">");
929 }
930 } else { /* anything else... hexdump */
931 if (len > CMD_FDT_MAX_DUMP)
932 printf("* 0x%p [0x%08x]", data, len);
933 else {
934 const u8 *s;
935
936 printf("[");
937 for (j = 0, s = data; j < len; j++)
938 printf("%02x%s", s[j], j < len - 1 ? " " : "");
939 printf("]");
940 }
941 }
942 }
943
944 /****************************************************************************/
945
946 /*
947 * Recursively print (a portion of) the working_fdt. The depth parameter
948 * determines how deeply nested the fdt is printed.
949 */
950 static int fdt_print(const char *pathp, char *prop, int depth)
951 {
952 static char tabs[MAX_LEVEL+1] =
953 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
954 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
955 const void *nodep; /* property node pointer */
956 int nodeoffset; /* node offset from libfdt */
957 int nextoffset; /* next node offset from libfdt */
958 uint32_t tag; /* tag */
959 int len; /* length of the property */
960 int level = 0; /* keep track of nesting level */
961 const struct fdt_property *fdt_prop;
962
963 nodeoffset = fdt_path_offset (working_fdt, pathp);
964 if (nodeoffset < 0) {
965 /*
966 * Not found or something else bad happened.
967 */
968 printf ("libfdt fdt_path_offset() returned %s\n",
969 fdt_strerror(nodeoffset));
970 return 1;
971 }
972 /*
973 * The user passed in a property as well as node path.
974 * Print only the given property and then return.
975 */
976 if (prop) {
977 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
978 if (len == 0) {
979 /* no property value */
980 printf("%s %s\n", pathp, prop);
981 return 0;
982 } else if (nodep && len > 0) {
983 printf("%s = ", prop);
984 print_data (nodep, len);
985 printf("\n");
986 return 0;
987 } else {
988 printf ("libfdt fdt_getprop(): %s\n",
989 fdt_strerror(len));
990 return 1;
991 }
992 }
993
994 /*
995 * The user passed in a node path and no property,
996 * print the node and all subnodes.
997 */
998 while(level >= 0) {
999 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1000 switch(tag) {
1001 case FDT_BEGIN_NODE:
1002 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1003 if (level <= depth) {
1004 if (pathp == NULL)
1005 pathp = "/* NULL pointer error */";
1006 if (*pathp == '\0')
1007 pathp = "/"; /* root is nameless */
1008 printf("%s%s {\n",
1009 &tabs[MAX_LEVEL - level], pathp);
1010 }
1011 level++;
1012 if (level >= MAX_LEVEL) {
1013 printf("Nested too deep, aborting.\n");
1014 return 1;
1015 }
1016 break;
1017 case FDT_END_NODE:
1018 level--;
1019 if (level <= depth)
1020 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1021 if (level == 0) {
1022 level = -1; /* exit the loop */
1023 }
1024 break;
1025 case FDT_PROP:
1026 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1027 sizeof(*fdt_prop));
1028 pathp = fdt_string(working_fdt,
1029 fdt32_to_cpu(fdt_prop->nameoff));
1030 len = fdt32_to_cpu(fdt_prop->len);
1031 nodep = fdt_prop->data;
1032 if (len < 0) {
1033 printf ("libfdt fdt_getprop(): %s\n",
1034 fdt_strerror(len));
1035 return 1;
1036 } else if (len == 0) {
1037 /* the property has no value */
1038 if (level <= depth)
1039 printf("%s%s;\n",
1040 &tabs[MAX_LEVEL - level],
1041 pathp);
1042 } else {
1043 if (level <= depth) {
1044 printf("%s%s = ",
1045 &tabs[MAX_LEVEL - level],
1046 pathp);
1047 print_data (nodep, len);
1048 printf(";\n");
1049 }
1050 }
1051 break;
1052 case FDT_NOP:
1053 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1054 break;
1055 case FDT_END:
1056 return 1;
1057 default:
1058 if (level <= depth)
1059 printf("Unknown tag 0x%08X\n", tag);
1060 return 1;
1061 }
1062 nodeoffset = nextoffset;
1063 }
1064 return 0;
1065 }
1066
1067 /********************************************************************/
1068 #ifdef CONFIG_SYS_LONGHELP
1069 static char fdt_help_text[] =
1070 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1071 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1072 "fdt apply <addr> - Apply overlay to the DT\n"
1073 #endif
1074 #ifdef CONFIG_OF_BOARD_SETUP
1075 "fdt boardsetup - Do board-specific set up\n"
1076 #endif
1077 #ifdef CONFIG_OF_SYSTEM_SETUP
1078 "fdt systemsetup - Do system-specific set up\n"
1079 #endif
1080 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1081 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1082 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1083 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1084 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1085 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1086 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1087 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1088 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1089 "fdt mknode <path> <node> - Create a new node after <path>\n"
1090 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1091 "fdt header - Display header info\n"
1092 "fdt bootcpu <id> - Set boot cpuid\n"
1093 "fdt memory <addr> <size> - Add/Update memory node\n"
1094 "fdt rsvmem print - Show current mem reserves\n"
1095 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1096 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1097 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1098 " <start>/<end> - initrd start/end addr\n"
1099 #if defined(CONFIG_FIT_SIGNATURE)
1100 "fdt checksign [<addr>] - check FIT signature\n"
1101 " <start> - addr of key blob\n"
1102 " default gd->fdt_blob\n"
1103 #endif
1104 "NOTE: Dereference aliases by omitting the leading '/', "
1105 "e.g. fdt print ethernet0.";
1106 #endif
1107
1108 U_BOOT_CMD(
1109 fdt, 255, 0, do_fdt,
1110 "flattened device tree utility commands", fdt_help_text
1111 );
"Das U-Boot" Source Tree