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