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