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