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
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(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])113 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
114 {
115 if (argc < 2)
116 return CMD_RET_USAGE;
117
118 /*
119 * Set the address of the fdt
120 */
121 if (strncmp(argv[1], "ad", 2) == 0) {
122 unsigned long addr;
123 int control = 0;
124 struct fdt_header *blob;
125 /*
126 * Set the address [and length] of the fdt.
127 */
128 argc -= 2;
129 argv += 2;
130 /* Temporary #ifdef - some archs don't have fdt_blob yet */
131 #ifdef CONFIG_OF_CONTROL
132 if (argc && !strcmp(*argv, "-c")) {
133 control = 1;
134 argc--;
135 argv++;
136 }
137 #endif
138 if (argc == 0) {
139 if (control)
140 blob = (struct fdt_header *)gd->fdt_blob;
141 else
142 blob = working_fdt;
143 if (!blob || !fdt_valid(&blob))
144 return 1;
145 printf("The address of the fdt is %#08lx\n",
146 control ? (ulong)map_to_sysmem(blob) :
147 env_get_hex("fdtaddr", 0));
148 return 0;
149 }
150
151 addr = simple_strtoul(argv[0], NULL, 16);
152 blob = map_sysmem(addr, 0);
153 if (!fdt_valid(&blob))
154 return 1;
155 if (control)
156 gd->fdt_blob = blob;
157 else
158 set_working_fdt_addr(addr);
159
160 if (argc >= 2) {
161 int len;
162 int err;
163 /*
164 * Optional new length
165 */
166 len = simple_strtoul(argv[1], NULL, 16);
167 if (len < fdt_totalsize(blob)) {
168 printf ("New length %d < existing length %d, "
169 "ignoring.\n",
170 len, fdt_totalsize(blob));
171 } else {
172 /*
173 * Open in place with a new length.
174 */
175 err = fdt_open_into(blob, blob, len);
176 if (err != 0) {
177 printf ("libfdt fdt_open_into(): %s\n",
178 fdt_strerror(err));
179 }
180 }
181 }
182
183 return CMD_RET_SUCCESS;
184 }
185
186 if (!working_fdt) {
187 puts(
188 "No FDT memory address configured. Please configure\n"
189 "the FDT address via \"fdt addr <address>\" command.\n"
190 "Aborting!\n");
191 return CMD_RET_FAILURE;
192 }
193
194 /*
195 * Move the working_fdt
196 */
197 if (strncmp(argv[1], "mo", 2) == 0) {
198 struct fdt_header *newaddr;
199 int len;
200 int err;
201
202 if (argc < 4)
203 return CMD_RET_USAGE;
204
205 /*
206 * Set the address and length of the fdt.
207 */
208 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
209 if (!fdt_valid(&working_fdt))
210 return 1;
211
212 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
213
214 /*
215 * If the user specifies a length, use that. Otherwise use the
216 * current length.
217 */
218 if (argc <= 4) {
219 len = fdt_totalsize(working_fdt);
220 } else {
221 len = simple_strtoul(argv[4], NULL, 16);
222 if (len < fdt_totalsize(working_fdt)) {
223 printf ("New length 0x%X < existing length "
224 "0x%X, aborting.\n",
225 len, fdt_totalsize(working_fdt));
226 return 1;
227 }
228 }
229
230 /*
231 * Copy to the new location.
232 */
233 err = fdt_open_into(working_fdt, newaddr, len);
234 if (err != 0) {
235 printf ("libfdt fdt_open_into(): %s\n",
236 fdt_strerror(err));
237 return 1;
238 }
239 set_working_fdt_addr((ulong)newaddr);
240 #ifdef CONFIG_OF_SYSTEM_SETUP
241 /* Call the board-specific fixup routine */
242 } else if (strncmp(argv[1], "sys", 3) == 0) {
243 int err = ft_system_setup(working_fdt, gd->bd);
244
245 if (err) {
246 printf("Failed to add system information to FDT: %s\n",
247 fdt_strerror(err));
248 return CMD_RET_FAILURE;
249 }
250 #endif
251 /*
252 * Make a new node
253 */
254 } else if (strncmp(argv[1], "mk", 2) == 0) {
255 char *pathp; /* path */
256 char *nodep; /* new node to add */
257 int nodeoffset; /* node offset from libfdt */
258 int err;
259
260 /*
261 * Parameters: Node path, new node to be appended to the path.
262 */
263 if (argc < 4)
264 return CMD_RET_USAGE;
265
266 pathp = argv[2];
267 nodep = argv[3];
268
269 nodeoffset = fdt_path_offset (working_fdt, pathp);
270 if (nodeoffset < 0) {
271 /*
272 * Not found or something else bad happened.
273 */
274 printf ("libfdt fdt_path_offset() returned %s\n",
275 fdt_strerror(nodeoffset));
276 return 1;
277 }
278 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
279 if (err < 0) {
280 printf ("libfdt fdt_add_subnode(): %s\n",
281 fdt_strerror(err));
282 return 1;
283 }
284
285 /*
286 * Set the value of a property in the working_fdt.
287 */
288 } else if (argv[1][0] == 's') {
289 char *pathp; /* path */
290 char *prop; /* property */
291 int nodeoffset; /* node offset from libfdt */
292 static char data[SCRATCHPAD] __aligned(4);/* property storage */
293 const void *ptmp;
294 int len; /* new length of the property */
295 int ret; /* return value */
296
297 /*
298 * Parameters: Node path, property, optional value.
299 */
300 if (argc < 4)
301 return CMD_RET_USAGE;
302
303 pathp = argv[2];
304 prop = argv[3];
305
306 nodeoffset = fdt_path_offset (working_fdt, pathp);
307 if (nodeoffset < 0) {
308 /*
309 * Not found or something else bad happened.
310 */
311 printf ("libfdt fdt_path_offset() returned %s\n",
312 fdt_strerror(nodeoffset));
313 return 1;
314 }
315
316 if (argc == 4) {
317 len = 0;
318 } else {
319 ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
320 if (len > SCRATCHPAD) {
321 printf("prop (%d) doesn't fit in scratchpad!\n",
322 len);
323 return 1;
324 }
325 if (ptmp != NULL)
326 memcpy(data, ptmp, len);
327
328 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
329 if (ret != 0)
330 return ret;
331 }
332
333 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
334 if (ret < 0) {
335 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
336 return 1;
337 }
338
339 /********************************************************************
340 * Get the value of a property in the working_fdt.
341 ********************************************************************/
342 } else if (argv[1][0] == 'g') {
343 char *subcmd; /* sub-command */
344 char *pathp; /* path */
345 char *prop; /* property */
346 char *var; /* variable to store result */
347 int nodeoffset; /* node offset from libfdt */
348 const void *nodep; /* property node pointer */
349 int len = 0; /* new length of the property */
350
351 /*
352 * Parameters: Node path, property, optional value.
353 */
354 if (argc < 5)
355 return CMD_RET_USAGE;
356
357 subcmd = argv[2];
358
359 if (argc < 6 && subcmd[0] != 's')
360 return CMD_RET_USAGE;
361
362 var = argv[3];
363 pathp = argv[4];
364 prop = argv[5];
365
366 nodeoffset = fdt_path_offset(working_fdt, pathp);
367 if (nodeoffset < 0) {
368 /*
369 * Not found or something else bad happened.
370 */
371 printf("libfdt fdt_path_offset() returned %s\n",
372 fdt_strerror(nodeoffset));
373 return 1;
374 }
375
376 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
377 int reqIndex = -1;
378 int startDepth = fdt_node_depth(
379 working_fdt, nodeoffset);
380 int curDepth = startDepth;
381 int curIndex = -1;
382 int nextNodeOffset = fdt_next_node(
383 working_fdt, nodeoffset, &curDepth);
384
385 if (subcmd[0] == 'n')
386 reqIndex = simple_strtoul(argv[5], NULL, 16);
387
388 while (curDepth > startDepth) {
389 if (curDepth == startDepth + 1)
390 curIndex++;
391 if (subcmd[0] == 'n' && curIndex == reqIndex) {
392 const char *node_name;
393
394 node_name = fdt_get_name(working_fdt,
395 nextNodeOffset,
396 NULL);
397 env_set(var, node_name);
398 return 0;
399 }
400 nextNodeOffset = fdt_next_node(
401 working_fdt, nextNodeOffset, &curDepth);
402 if (nextNodeOffset < 0)
403 break;
404 }
405 if (subcmd[0] == 's') {
406 /* get the num nodes at this level */
407 env_set_ulong(var, curIndex + 1);
408 } else {
409 /* node index not found */
410 printf("libfdt node not found\n");
411 return 1;
412 }
413 } else {
414 nodep = fdt_getprop(
415 working_fdt, nodeoffset, prop, &len);
416 if (len == 0) {
417 /* no property value */
418 env_set(var, "");
419 return 0;
420 } else if (nodep && len > 0) {
421 if (subcmd[0] == 'v') {
422 int ret;
423
424 ret = fdt_value_env_set(nodep, len,
425 var);
426 if (ret != 0)
427 return ret;
428 } else if (subcmd[0] == 'a') {
429 /* Get address */
430 char buf[11];
431
432 sprintf(buf, "0x%p", nodep);
433 env_set(var, buf);
434 } else if (subcmd[0] == 's') {
435 /* Get size */
436 char buf[11];
437
438 sprintf(buf, "0x%08X", len);
439 env_set(var, buf);
440 } else
441 return CMD_RET_USAGE;
442 return 0;
443 } else {
444 printf("libfdt fdt_getprop(): %s\n",
445 fdt_strerror(len));
446 return 1;
447 }
448 }
449
450 /*
451 * Print (recursive) / List (single level)
452 */
453 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
454 int depth = MAX_LEVEL; /* how deep to print */
455 char *pathp; /* path */
456 char *prop; /* property */
457 int ret; /* return value */
458 static char root[2] = "/";
459
460 /*
461 * list is an alias for print, but limited to 1 level
462 */
463 if (argv[1][0] == 'l') {
464 depth = 1;
465 }
466
467 /*
468 * Get the starting path. The root node is an oddball,
469 * the offset is zero and has no name.
470 */
471 if (argc == 2)
472 pathp = root;
473 else
474 pathp = argv[2];
475 if (argc > 3)
476 prop = argv[3];
477 else
478 prop = NULL;
479
480 ret = fdt_print(pathp, prop, depth);
481 if (ret != 0)
482 return ret;
483
484 /*
485 * Remove a property/node
486 */
487 } else if (strncmp(argv[1], "rm", 2) == 0) {
488 int nodeoffset; /* node offset from libfdt */
489 int err;
490
491 /*
492 * Get the path. The root node is an oddball, the offset
493 * is zero and has no name.
494 */
495 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
496 if (nodeoffset < 0) {
497 /*
498 * Not found or something else bad happened.
499 */
500 printf ("libfdt fdt_path_offset() returned %s\n",
501 fdt_strerror(nodeoffset));
502 return 1;
503 }
504 /*
505 * Do the delete. A fourth parameter means delete a property,
506 * otherwise delete the node.
507 */
508 if (argc > 3) {
509 err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
510 if (err < 0) {
511 printf("libfdt fdt_delprop(): %s\n",
512 fdt_strerror(err));
513 return err;
514 }
515 } else {
516 err = fdt_del_node(working_fdt, nodeoffset);
517 if (err < 0) {
518 printf("libfdt fdt_del_node(): %s\n",
519 fdt_strerror(err));
520 return err;
521 }
522 }
523
524 /*
525 * Display header info
526 */
527 } else if (argv[1][0] == 'h') {
528 if (argc == 5)
529 return fdt_get_header_value(argc, argv);
530
531 u32 version = fdt_version(working_fdt);
532 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
533 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
534 fdt_totalsize(working_fdt));
535 printf("off_dt_struct:\t\t0x%x\n",
536 fdt_off_dt_struct(working_fdt));
537 printf("off_dt_strings:\t\t0x%x\n",
538 fdt_off_dt_strings(working_fdt));
539 printf("off_mem_rsvmap:\t\t0x%x\n",
540 fdt_off_mem_rsvmap(working_fdt));
541 printf("version:\t\t%d\n", version);
542 printf("last_comp_version:\t%d\n",
543 fdt_last_comp_version(working_fdt));
544 if (version >= 2)
545 printf("boot_cpuid_phys:\t0x%x\n",
546 fdt_boot_cpuid_phys(working_fdt));
547 if (version >= 3)
548 printf("size_dt_strings:\t0x%x\n",
549 fdt_size_dt_strings(working_fdt));
550 if (version >= 17)
551 printf("size_dt_struct:\t\t0x%x\n",
552 fdt_size_dt_struct(working_fdt));
553 printf("number mem_rsv:\t\t0x%x\n",
554 fdt_num_mem_rsv(working_fdt));
555 printf("\n");
556
557 /*
558 * Set boot cpu id
559 */
560 } else if (strncmp(argv[1], "boo", 3) == 0) {
561 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
562 fdt_set_boot_cpuid_phys(working_fdt, tmp);
563
564 /*
565 * memory command
566 */
567 } else if (strncmp(argv[1], "me", 2) == 0) {
568 uint64_t addr, size;
569 int err;
570 addr = simple_strtoull(argv[2], NULL, 16);
571 size = simple_strtoull(argv[3], NULL, 16);
572 err = fdt_fixup_memory(working_fdt, addr, size);
573 if (err < 0)
574 return err;
575
576 /*
577 * mem reserve commands
578 */
579 } else if (strncmp(argv[1], "rs", 2) == 0) {
580 if (argv[2][0] == 'p') {
581 uint64_t addr, size;
582 int total = fdt_num_mem_rsv(working_fdt);
583 int j, err;
584 printf("index\t\t start\t\t size\n");
585 printf("-------------------------------"
586 "-----------------\n");
587 for (j = 0; j < total; j++) {
588 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
589 if (err < 0) {
590 printf("libfdt fdt_get_mem_rsv(): %s\n",
591 fdt_strerror(err));
592 return err;
593 }
594 printf(" %x\t%08x%08x\t%08x%08x\n", j,
595 (u32)(addr >> 32),
596 (u32)(addr & 0xffffffff),
597 (u32)(size >> 32),
598 (u32)(size & 0xffffffff));
599 }
600 } else if (argv[2][0] == 'a') {
601 uint64_t addr, size;
602 int err;
603 addr = simple_strtoull(argv[3], NULL, 16);
604 size = simple_strtoull(argv[4], NULL, 16);
605 err = fdt_add_mem_rsv(working_fdt, addr, size);
606
607 if (err < 0) {
608 printf("libfdt fdt_add_mem_rsv(): %s\n",
609 fdt_strerror(err));
610 return err;
611 }
612 } else if (argv[2][0] == 'd') {
613 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
614 int err = fdt_del_mem_rsv(working_fdt, idx);
615
616 if (err < 0) {
617 printf("libfdt fdt_del_mem_rsv(): %s\n",
618 fdt_strerror(err));
619 return err;
620 }
621 } else {
622 /* Unrecognized command */
623 return CMD_RET_USAGE;
624 }
625 }
626 #ifdef CONFIG_OF_BOARD_SETUP
627 /* Call the board-specific fixup routine */
628 else if (strncmp(argv[1], "boa", 3) == 0) {
629 int err = ft_board_setup(working_fdt, gd->bd);
630
631 if (err) {
632 printf("Failed to update board information in FDT: %s\n",
633 fdt_strerror(err));
634 return CMD_RET_FAILURE;
635 }
636 #ifdef CONFIG_SOC_KEYSTONE
637 ft_board_setup_ex(working_fdt, gd->bd);
638 #endif
639 }
640 #endif
641 /* Create a chosen node */
642 else if (strncmp(argv[1], "cho", 3) == 0) {
643 unsigned long initrd_start = 0, initrd_end = 0;
644
645 if ((argc != 2) && (argc != 4))
646 return CMD_RET_USAGE;
647
648 if (argc == 4) {
649 initrd_start = simple_strtoul(argv[2], NULL, 16);
650 initrd_end = simple_strtoul(argv[3], NULL, 16);
651 }
652
653 fdt_chosen(working_fdt);
654 fdt_initrd(working_fdt, initrd_start, initrd_end);
655
656 #if defined(CONFIG_FIT_SIGNATURE)
657 } else if (strncmp(argv[1], "che", 3) == 0) {
658 int cfg_noffset;
659 int ret;
660 unsigned long addr;
661 struct fdt_header *blob;
662
663 if (!working_fdt)
664 return CMD_RET_FAILURE;
665
666 if (argc > 2) {
667 addr = simple_strtoul(argv[2], NULL, 16);
668 blob = map_sysmem(addr, 0);
669 } else {
670 blob = (struct fdt_header *)gd->fdt_blob;
671 }
672 if (!fdt_valid(&blob))
673 return 1;
674
675 gd->fdt_blob = blob;
676 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
677 if (!cfg_noffset) {
678 printf("Could not find configuration node: %s\n",
679 fdt_strerror(cfg_noffset));
680 return CMD_RET_FAILURE;
681 }
682
683 ret = fit_config_verify(working_fdt, cfg_noffset);
684 if (ret == 0)
685 return CMD_RET_SUCCESS;
686 else
687 return CMD_RET_FAILURE;
688 #endif
689
690 }
691 #ifdef CONFIG_OF_LIBFDT_OVERLAY
692 /* apply an overlay */
693 else if (strncmp(argv[1], "ap", 2) == 0) {
694 unsigned long addr;
695 struct fdt_header *blob;
696 int ret;
697
698 if (argc != 3)
699 return CMD_RET_USAGE;
700
701 if (!working_fdt)
702 return CMD_RET_FAILURE;
703
704 addr = simple_strtoul(argv[2], NULL, 16);
705 blob = map_sysmem(addr, 0);
706 if (!fdt_valid(&blob))
707 return CMD_RET_FAILURE;
708
709 /* apply method prints messages on error */
710 ret = fdt_overlay_apply_verbose(working_fdt, blob);
711 if (ret)
712 return CMD_RET_FAILURE;
713 }
714 #endif
715 /* resize the fdt */
716 else if (strncmp(argv[1], "re", 2) == 0) {
717 uint extrasize;
718 if (argc > 2)
719 extrasize = simple_strtoul(argv[2], NULL, 16);
720 else
721 extrasize = 0;
722 fdt_shrink_to_minimum(working_fdt, extrasize);
723 }
724 else {
725 /* Unrecognized command */
726 return CMD_RET_USAGE;
727 }
728
729 return 0;
730 }
731
732 /****************************************************************************/
733
734 /**
735 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
736 *
737 * @blobp: Pointer to FDT pointer
738 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
739 */
fdt_valid(struct fdt_header ** blobp)740 static int fdt_valid(struct fdt_header **blobp)
741 {
742 const void *blob = *blobp;
743 int err;
744
745 if (blob == NULL) {
746 printf ("The address of the fdt is invalid (NULL).\n");
747 return 0;
748 }
749
750 err = fdt_check_header(blob);
751 if (err == 0)
752 return 1; /* valid */
753
754 if (err < 0) {
755 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
756 /*
757 * Be more informative on bad version.
758 */
759 if (err == -FDT_ERR_BADVERSION) {
760 if (fdt_version(blob) <
761 FDT_FIRST_SUPPORTED_VERSION) {
762 printf (" - too old, fdt %d < %d",
763 fdt_version(blob),
764 FDT_FIRST_SUPPORTED_VERSION);
765 }
766 if (fdt_last_comp_version(blob) >
767 FDT_LAST_SUPPORTED_VERSION) {
768 printf (" - too new, fdt %d > %d",
769 fdt_version(blob),
770 FDT_LAST_SUPPORTED_VERSION);
771 }
772 }
773 printf("\n");
774 *blobp = NULL;
775 return 0;
776 }
777 return 1;
778 }
779
780 /****************************************************************************/
781
782 /*
783 * Parse the user's input, partially heuristic. Valid formats:
784 * <0x00112233 4 05> - an array of cells. Numbers follow standard
785 * C conventions.
786 * [00 11 22 .. nn] - byte stream
787 * "string" - If the the value doesn't start with "<" or "[", it is
788 * treated as a string. Note that the quotes are
789 * stripped by the parser before we get the string.
790 * newval: An array of strings containing the new property as specified
791 * on the command line
792 * count: The number of strings in the array
793 * data: A bytestream to be placed in the property
794 * len: The length of the resulting bytestream
795 */
fdt_parse_prop(char * const * newval,int count,char * data,int * len)796 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
797 {
798 char *cp; /* temporary char pointer */
799 char *newp; /* temporary newval char pointer */
800 unsigned long tmp; /* holds converted values */
801 int stridx = 0;
802
803 *len = 0;
804 newp = newval[0];
805
806 /* An array of cells */
807 if (*newp == '<') {
808 newp++;
809 while ((*newp != '>') && (stridx < count)) {
810 /*
811 * Keep searching until we find that last ">"
812 * That way users don't have to escape the spaces
813 */
814 if (*newp == '\0') {
815 newp = newval[++stridx];
816 continue;
817 }
818
819 cp = newp;
820 tmp = simple_strtoul(cp, &newp, 0);
821 if (*cp != '?')
822 *(fdt32_t *)data = cpu_to_fdt32(tmp);
823 else
824 newp++;
825
826 data += 4;
827 *len += 4;
828
829 /* If the ptr didn't advance, something went wrong */
830 if ((newp - cp) <= 0) {
831 printf("Sorry, I could not convert \"%s\"\n",
832 cp);
833 return 1;
834 }
835
836 while (*newp == ' ')
837 newp++;
838 }
839
840 if (*newp != '>') {
841 printf("Unexpected character '%c'\n", *newp);
842 return 1;
843 }
844 } else if (*newp == '[') {
845 /*
846 * Byte stream. Convert the values.
847 */
848 newp++;
849 while ((stridx < count) && (*newp != ']')) {
850 while (*newp == ' ')
851 newp++;
852 if (*newp == '\0') {
853 newp = newval[++stridx];
854 continue;
855 }
856 if (!isxdigit(*newp))
857 break;
858 tmp = simple_strtoul(newp, &newp, 16);
859 *data++ = tmp & 0xFF;
860 *len = *len + 1;
861 }
862 if (*newp != ']') {
863 printf("Unexpected character '%c'\n", *newp);
864 return 1;
865 }
866 } else {
867 /*
868 * Assume it is one or more strings. Copy it into our
869 * data area for convenience (including the
870 * terminating '\0's).
871 */
872 while (stridx < count) {
873 size_t length = strlen(newp) + 1;
874 strcpy(data, newp);
875 data += length;
876 *len += length;
877 newp = newval[++stridx];
878 }
879 }
880 return 0;
881 }
882
883 /****************************************************************************/
884
885 /*
886 * Heuristic to guess if this is a string or concatenated strings.
887 */
888
is_printable_string(const void * data,int len)889 static int is_printable_string(const void *data, int len)
890 {
891 const char *s = data;
892
893 /* zero length is not */
894 if (len == 0)
895 return 0;
896
897 /* must terminate with zero or '\n' */
898 if (s[len - 1] != '\0' && s[len - 1] != '\n')
899 return 0;
900
901 /* printable or a null byte (concatenated strings) */
902 while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
903 /*
904 * If we see a null, there are three possibilities:
905 * 1) If len == 1, it is the end of the string, printable
906 * 2) Next character also a null, not printable.
907 * 3) Next character not a null, continue to check.
908 */
909 if (s[0] == '\0') {
910 if (len == 1)
911 return 1;
912 if (s[1] == '\0')
913 return 0;
914 }
915 s++;
916 len--;
917 }
918
919 /* Not the null termination, or not done yet: not printable */
920 if (*s != '\0' || (len != 0))
921 return 0;
922
923 return 1;
924 }
925
926
927 /*
928 * Print the property in the best format, a heuristic guess. Print as
929 * a string, concatenated strings, a byte, word, double word, or (if all
930 * else fails) it is printed as a stream of bytes.
931 */
print_data(const void * data,int len)932 static void print_data(const void *data, int len)
933 {
934 int j;
935
936 /* no data, don't print */
937 if (len == 0)
938 return;
939
940 /*
941 * It is a string, but it may have multiple strings (embedded '\0's).
942 */
943 if (is_printable_string(data, len)) {
944 puts("\"");
945 j = 0;
946 while (j < len) {
947 if (j > 0)
948 puts("\", \"");
949 puts(data);
950 j += strlen(data) + 1;
951 data += strlen(data) + 1;
952 }
953 puts("\"");
954 return;
955 }
956
957 if ((len %4) == 0) {
958 if (len > CMD_FDT_MAX_DUMP)
959 printf("* 0x%p [0x%08x]", data, len);
960 else {
961 const __be32 *p;
962
963 printf("<");
964 for (j = 0, p = data; j < len/4; j++)
965 printf("0x%08x%s", fdt32_to_cpu(p[j]),
966 j < (len/4 - 1) ? " " : "");
967 printf(">");
968 }
969 } else { /* anything else... hexdump */
970 if (len > CMD_FDT_MAX_DUMP)
971 printf("* 0x%p [0x%08x]", data, len);
972 else {
973 const u8 *s;
974
975 printf("[");
976 for (j = 0, s = data; j < len; j++)
977 printf("%02x%s", s[j], j < len - 1 ? " " : "");
978 printf("]");
979 }
980 }
981 }
982
983 /****************************************************************************/
984
985 /*
986 * Recursively print (a portion of) the working_fdt. The depth parameter
987 * determines how deeply nested the fdt is printed.
988 */
fdt_print(const char * pathp,char * prop,int depth)989 static int fdt_print(const char *pathp, char *prop, int depth)
990 {
991 static char tabs[MAX_LEVEL+1] =
992 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
993 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
994 const void *nodep; /* property node pointer */
995 int nodeoffset; /* node offset from libfdt */
996 int nextoffset; /* next node offset from libfdt */
997 uint32_t tag; /* tag */
998 int len; /* length of the property */
999 int level = 0; /* keep track of nesting level */
1000 const struct fdt_property *fdt_prop;
1001
1002 nodeoffset = fdt_path_offset (working_fdt, pathp);
1003 if (nodeoffset < 0) {
1004 /*
1005 * Not found or something else bad happened.
1006 */
1007 printf ("libfdt fdt_path_offset() returned %s\n",
1008 fdt_strerror(nodeoffset));
1009 return 1;
1010 }
1011 /*
1012 * The user passed in a property as well as node path.
1013 * Print only the given property and then return.
1014 */
1015 if (prop) {
1016 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
1017 if (len == 0) {
1018 /* no property value */
1019 printf("%s %s\n", pathp, prop);
1020 return 0;
1021 } else if (nodep && len > 0) {
1022 printf("%s = ", prop);
1023 print_data (nodep, len);
1024 printf("\n");
1025 return 0;
1026 } else {
1027 printf ("libfdt fdt_getprop(): %s\n",
1028 fdt_strerror(len));
1029 return 1;
1030 }
1031 }
1032
1033 /*
1034 * The user passed in a node path and no property,
1035 * print the node and all subnodes.
1036 */
1037 while(level >= 0) {
1038 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1039 switch(tag) {
1040 case FDT_BEGIN_NODE:
1041 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1042 if (level <= depth) {
1043 if (pathp == NULL)
1044 pathp = "/* NULL pointer error */";
1045 if (*pathp == '\0')
1046 pathp = "/"; /* root is nameless */
1047 printf("%s%s {\n",
1048 &tabs[MAX_LEVEL - level], pathp);
1049 }
1050 level++;
1051 if (level >= MAX_LEVEL) {
1052 printf("Nested too deep, aborting.\n");
1053 return 1;
1054 }
1055 break;
1056 case FDT_END_NODE:
1057 level--;
1058 if (level <= depth)
1059 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1060 if (level == 0) {
1061 level = -1; /* exit the loop */
1062 }
1063 break;
1064 case FDT_PROP:
1065 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1066 sizeof(*fdt_prop));
1067 pathp = fdt_string(working_fdt,
1068 fdt32_to_cpu(fdt_prop->nameoff));
1069 len = fdt32_to_cpu(fdt_prop->len);
1070 nodep = fdt_prop->data;
1071 if (len < 0) {
1072 printf ("libfdt fdt_getprop(): %s\n",
1073 fdt_strerror(len));
1074 return 1;
1075 } else if (len == 0) {
1076 /* the property has no value */
1077 if (level <= depth)
1078 printf("%s%s;\n",
1079 &tabs[MAX_LEVEL - level],
1080 pathp);
1081 } else {
1082 if (level <= depth) {
1083 printf("%s%s = ",
1084 &tabs[MAX_LEVEL - level],
1085 pathp);
1086 print_data (nodep, len);
1087 printf(";\n");
1088 }
1089 }
1090 break;
1091 case FDT_NOP:
1092 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1093 break;
1094 case FDT_END:
1095 return 1;
1096 default:
1097 if (level <= depth)
1098 printf("Unknown tag 0x%08X\n", tag);
1099 return 1;
1100 }
1101 nodeoffset = nextoffset;
1102 }
1103 return 0;
1104 }
1105
1106 /********************************************************************/
1107 #ifdef CONFIG_SYS_LONGHELP
1108 static char fdt_help_text[] =
1109 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1110 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1111 "fdt apply <addr> - Apply overlay to the DT\n"
1112 #endif
1113 #ifdef CONFIG_OF_BOARD_SETUP
1114 "fdt boardsetup - Do board-specific set up\n"
1115 #endif
1116 #ifdef CONFIG_OF_SYSTEM_SETUP
1117 "fdt systemsetup - Do system-specific set up\n"
1118 #endif
1119 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1120 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1121 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1122 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1123 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1124 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1125 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1126 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1127 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1128 "fdt mknode <path> <node> - Create a new node after <path>\n"
1129 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1130 "fdt header [get <var> <member>] - Display header info\n"
1131 " get - get header member <member> and store it in <var>\n"
1132 "fdt bootcpu <id> - Set boot cpuid\n"
1133 "fdt memory <addr> <size> - Add/Update memory node\n"
1134 "fdt rsvmem print - Show current mem reserves\n"
1135 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1136 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1137 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1138 " <start>/<end> - initrd start/end addr\n"
1139 #if defined(CONFIG_FIT_SIGNATURE)
1140 "fdt checksign [<addr>] - check FIT signature\n"
1141 " <start> - addr of key blob\n"
1142 " default gd->fdt_blob\n"
1143 #endif
1144 "NOTE: Dereference aliases by omitting the leading '/', "
1145 "e.g. fdt print ethernet0.";
1146 #endif
1147
1148 U_BOOT_CMD(
1149 fdt, 255, 0, do_fdt,
1150 "flattened device tree utility commands", fdt_help_text
1151 );
1152