Merge git://git.denx.de/u-boot-dm
[platform/kernel/u-boot.git] / cmd / fdt.c
1 /*
2  * (C) Copyright 2007
3  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4  * Based on code written by:
5  *   Pantelis Antoniou <pantelis.antoniou@gmail.com> and
6  *   Matthew McClintock <msm@freescale.com>
7  *
8  * SPDX-License-Identifier:     GPL-2.0+
9  */
10
11 #include <common.h>
12 #include <command.h>
13 #include <linux/ctype.h>
14 #include <linux/types.h>
15 #include <asm/global_data.h>
16 #include <libfdt.h>
17 #include <fdt_support.h>
18 #include <mapmem.h>
19 #include <asm/io.h>
20
21 #define MAX_LEVEL       32              /* how deeply nested we will go */
22 #define SCRATCHPAD      1024            /* bytes of scratchpad memory */
23 #define CMD_FDT_MAX_DUMP 64
24
25 /*
26  * Global data (for the gd->bd)
27  */
28 DECLARE_GLOBAL_DATA_PTR;
29
30 static int fdt_valid(struct fdt_header **blobp);
31 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
32 static int fdt_print(const char *pathp, char *prop, int depth);
33 static int is_printable_string(const void *data, int len);
34
35 /*
36  * The working_fdt points to our working flattened device tree.
37  */
38 struct fdt_header *working_fdt;
39
40 void set_working_fdt_addr(ulong addr)
41 {
42         void *buf;
43
44         buf = map_sysmem(addr, 0);
45         working_fdt = buf;
46         setenv_hex("fdtaddr", addr);
47 }
48
49 /*
50  * Get a value from the fdt and format it to be set in the environment
51  */
52 static int fdt_value_setenv(const void *nodep, int len, const char *var)
53 {
54         if (is_printable_string(nodep, len))
55                 setenv(var, (void *)nodep);
56         else if (len == 4) {
57                 char buf[11];
58
59                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
60                 setenv(var, buf);
61         } else if (len%4 == 0 && len <= 20) {
62                 /* Needed to print things like sha1 hashes. */
63                 char buf[41];
64                 int i;
65
66                 for (i = 0; i < len; i += sizeof(unsigned int))
67                         sprintf(buf + (i * 2), "%08x",
68                                 *(unsigned int *)(nodep + i));
69                 setenv(var, buf);
70         } else {
71                 printf("error: unprintable value\n");
72                 return 1;
73         }
74         return 0;
75 }
76
77 /*
78  * Flattened Device Tree command, see the help for parameter definitions.
79  */
80 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
81 {
82         if (argc < 2)
83                 return CMD_RET_USAGE;
84
85         /*
86          * Set the address of the fdt
87          */
88         if (strncmp(argv[1], "ad", 2) == 0) {
89                 unsigned long addr;
90                 int control = 0;
91                 struct fdt_header *blob;
92                 /*
93                  * Set the address [and length] of the fdt.
94                  */
95                 argc -= 2;
96                 argv += 2;
97 /* Temporary #ifdef - some archs don't have fdt_blob yet */
98 #ifdef CONFIG_OF_CONTROL
99                 if (argc && !strcmp(*argv, "-c")) {
100                         control = 1;
101                         argc--;
102                         argv++;
103                 }
104 #endif
105                 if (argc == 0) {
106                         if (control)
107                                 blob = (struct fdt_header *)gd->fdt_blob;
108                         else
109                                 blob = working_fdt;
110                         if (!blob || !fdt_valid(&blob))
111                                 return 1;
112                         printf("The address of the fdt is %#08lx\n",
113                                control ? (ulong)map_to_sysmem(blob) :
114                                         getenv_hex("fdtaddr", 0));
115                         return 0;
116                 }
117
118                 addr = simple_strtoul(argv[0], NULL, 16);
119                 blob = map_sysmem(addr, 0);
120                 if (!fdt_valid(&blob))
121                         return 1;
122                 if (control)
123                         gd->fdt_blob = blob;
124                 else
125                         set_working_fdt_addr(addr);
126
127                 if (argc >= 2) {
128                         int  len;
129                         int  err;
130                         /*
131                          * Optional new length
132                          */
133                         len = simple_strtoul(argv[1], NULL, 16);
134                         if (len < fdt_totalsize(blob)) {
135                                 printf ("New length %d < existing length %d, "
136                                         "ignoring.\n",
137                                         len, fdt_totalsize(blob));
138                         } else {
139                                 /*
140                                  * Open in place with a new length.
141                                  */
142                                 err = fdt_open_into(blob, blob, len);
143                                 if (err != 0) {
144                                         printf ("libfdt fdt_open_into(): %s\n",
145                                                 fdt_strerror(err));
146                                 }
147                         }
148                 }
149
150                 return CMD_RET_SUCCESS;
151         }
152
153         if (!working_fdt) {
154                 puts(
155                         "No FDT memory address configured. Please configure\n"
156                         "the FDT address via \"fdt addr <address>\" command.\n"
157                         "Aborting!\n");
158                 return CMD_RET_FAILURE;
159         }
160
161         /*
162          * Move the working_fdt
163          */
164         if (strncmp(argv[1], "mo", 2) == 0) {
165                 struct fdt_header *newaddr;
166                 int  len;
167                 int  err;
168
169                 if (argc < 4)
170                         return CMD_RET_USAGE;
171
172                 /*
173                  * Set the address and length of the fdt.
174                  */
175                 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
176                 if (!fdt_valid(&working_fdt))
177                         return 1;
178
179                 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
180
181                 /*
182                  * If the user specifies a length, use that.  Otherwise use the
183                  * current length.
184                  */
185                 if (argc <= 4) {
186                         len = fdt_totalsize(working_fdt);
187                 } else {
188                         len = simple_strtoul(argv[4], NULL, 16);
189                         if (len < fdt_totalsize(working_fdt)) {
190                                 printf ("New length 0x%X < existing length "
191                                         "0x%X, aborting.\n",
192                                         len, fdt_totalsize(working_fdt));
193                                 return 1;
194                         }
195                 }
196
197                 /*
198                  * Copy to the new location.
199                  */
200                 err = fdt_open_into(working_fdt, newaddr, len);
201                 if (err != 0) {
202                         printf ("libfdt fdt_open_into(): %s\n",
203                                 fdt_strerror(err));
204                         return 1;
205                 }
206                 working_fdt = newaddr;
207 #ifdef CONFIG_OF_SYSTEM_SETUP
208         /* Call the board-specific fixup routine */
209         } else if (strncmp(argv[1], "sys", 3) == 0) {
210                 int err = ft_system_setup(working_fdt, gd->bd);
211
212                 if (err) {
213                         printf("Failed to add system information to FDT: %s\n",
214                                fdt_strerror(err));
215                         return CMD_RET_FAILURE;
216                 }
217 #endif
218         /*
219          * Make a new node
220          */
221         } else if (strncmp(argv[1], "mk", 2) == 0) {
222                 char *pathp;            /* path */
223                 char *nodep;            /* new node to add */
224                 int  nodeoffset;        /* node offset from libfdt */
225                 int  err;
226
227                 /*
228                  * Parameters: Node path, new node to be appended to the path.
229                  */
230                 if (argc < 4)
231                         return CMD_RET_USAGE;
232
233                 pathp = argv[2];
234                 nodep = argv[3];
235
236                 nodeoffset = fdt_path_offset (working_fdt, pathp);
237                 if (nodeoffset < 0) {
238                         /*
239                          * Not found or something else bad happened.
240                          */
241                         printf ("libfdt fdt_path_offset() returned %s\n",
242                                 fdt_strerror(nodeoffset));
243                         return 1;
244                 }
245                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
246                 if (err < 0) {
247                         printf ("libfdt fdt_add_subnode(): %s\n",
248                                 fdt_strerror(err));
249                         return 1;
250                 }
251
252         /*
253          * Set the value of a property in the working_fdt.
254          */
255         } else if (argv[1][0] == 's') {
256                 char *pathp;            /* path */
257                 char *prop;             /* property */
258                 int  nodeoffset;        /* node offset from libfdt */
259                 static char data[SCRATCHPAD];   /* storage for the property */
260                 const void *ptmp;
261                 int  len;               /* new length of the property */
262                 int  ret;               /* return value */
263
264                 /*
265                  * Parameters: Node path, property, optional value.
266                  */
267                 if (argc < 4)
268                         return CMD_RET_USAGE;
269
270                 pathp  = argv[2];
271                 prop   = argv[3];
272
273                 nodeoffset = fdt_path_offset (working_fdt, pathp);
274                 if (nodeoffset < 0) {
275                         /*
276                          * Not found or something else bad happened.
277                          */
278                         printf ("libfdt fdt_path_offset() returned %s\n",
279                                 fdt_strerror(nodeoffset));
280                         return 1;
281                 }
282
283                 if (argc == 4) {
284                         len = 0;
285                 } else {
286                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
287                         if (!ptmp) {
288                                 printf("prop (%s) not found!\n", prop);
289                                 return 1;
290                         }
291                         if (len > SCRATCHPAD) {
292                                 printf("prop (%d) doesn't fit in scratchpad!\n",
293                                        len);
294                                 return 1;
295                         }
296                         memcpy(data, ptmp, len);
297                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
298                         if (ret != 0)
299                                 return ret;
300                 }
301
302                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
303                 if (ret < 0) {
304                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
305                         return 1;
306                 }
307
308         /********************************************************************
309          * Get the value of a property in the working_fdt.
310          ********************************************************************/
311         } else if (argv[1][0] == 'g') {
312                 char *subcmd;           /* sub-command */
313                 char *pathp;            /* path */
314                 char *prop;             /* property */
315                 char *var;              /* variable to store result */
316                 int  nodeoffset;        /* node offset from libfdt */
317                 const void *nodep;      /* property node pointer */
318                 int  len = 0;           /* new length of the property */
319
320                 /*
321                  * Parameters: Node path, property, optional value.
322                  */
323                 if (argc < 5)
324                         return CMD_RET_USAGE;
325
326                 subcmd = argv[2];
327
328                 if (argc < 6 && subcmd[0] != 's')
329                         return CMD_RET_USAGE;
330
331                 var    = argv[3];
332                 pathp  = argv[4];
333                 prop   = argv[5];
334
335                 nodeoffset = fdt_path_offset(working_fdt, pathp);
336                 if (nodeoffset < 0) {
337                         /*
338                          * Not found or something else bad happened.
339                          */
340                         printf("libfdt fdt_path_offset() returned %s\n",
341                                 fdt_strerror(nodeoffset));
342                         return 1;
343                 }
344
345                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
346                         int reqIndex = -1;
347                         int startDepth = fdt_node_depth(
348                                 working_fdt, nodeoffset);
349                         int curDepth = startDepth;
350                         int curIndex = -1;
351                         int nextNodeOffset = fdt_next_node(
352                                 working_fdt, nodeoffset, &curDepth);
353
354                         if (subcmd[0] == 'n')
355                                 reqIndex = simple_strtoul(argv[5], NULL, 16);
356
357                         while (curDepth > startDepth) {
358                                 if (curDepth == startDepth + 1)
359                                         curIndex++;
360                                 if (subcmd[0] == 'n' && curIndex == reqIndex) {
361                                         const char *nodeName = fdt_get_name(
362                                             working_fdt, nextNodeOffset, NULL);
363
364                                         setenv(var, (char *)nodeName);
365                                         return 0;
366                                 }
367                                 nextNodeOffset = fdt_next_node(
368                                         working_fdt, nextNodeOffset, &curDepth);
369                                 if (nextNodeOffset < 0)
370                                         break;
371                         }
372                         if (subcmd[0] == 's') {
373                                 /* get the num nodes at this level */
374                                 setenv_ulong(var, curIndex + 1);
375                         } else {
376                                 /* node index not found */
377                                 printf("libfdt node not found\n");
378                                 return 1;
379                         }
380                 } else {
381                         nodep = fdt_getprop(
382                                 working_fdt, nodeoffset, prop, &len);
383                         if (len == 0) {
384                                 /* no property value */
385                                 setenv(var, "");
386                                 return 0;
387                         } else if (nodep && len > 0) {
388                                 if (subcmd[0] == 'v') {
389                                         int ret;
390
391                                         ret = fdt_value_setenv(nodep, len, var);
392                                         if (ret != 0)
393                                                 return ret;
394                                 } else if (subcmd[0] == 'a') {
395                                         /* Get address */
396                                         char buf[11];
397
398                                         sprintf(buf, "0x%p", nodep);
399                                         setenv(var, buf);
400                                 } else if (subcmd[0] == 's') {
401                                         /* Get size */
402                                         char buf[11];
403
404                                         sprintf(buf, "0x%08X", len);
405                                         setenv(var, buf);
406                                 } else
407                                         return CMD_RET_USAGE;
408                                 return 0;
409                         } else {
410                                 printf("libfdt fdt_getprop(): %s\n",
411                                         fdt_strerror(len));
412                                 return 1;
413                         }
414                 }
415
416         /*
417          * Print (recursive) / List (single level)
418          */
419         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
420                 int depth = MAX_LEVEL;  /* how deep to print */
421                 char *pathp;            /* path */
422                 char *prop;             /* property */
423                 int  ret;               /* return value */
424                 static char root[2] = "/";
425
426                 /*
427                  * list is an alias for print, but limited to 1 level
428                  */
429                 if (argv[1][0] == 'l') {
430                         depth = 1;
431                 }
432
433                 /*
434                  * Get the starting path.  The root node is an oddball,
435                  * the offset is zero and has no name.
436                  */
437                 if (argc == 2)
438                         pathp = root;
439                 else
440                         pathp = argv[2];
441                 if (argc > 3)
442                         prop = argv[3];
443                 else
444                         prop = NULL;
445
446                 ret = fdt_print(pathp, prop, depth);
447                 if (ret != 0)
448                         return ret;
449
450         /*
451          * Remove a property/node
452          */
453         } else if (strncmp(argv[1], "rm", 2) == 0) {
454                 int  nodeoffset;        /* node offset from libfdt */
455                 int  err;
456
457                 /*
458                  * Get the path.  The root node is an oddball, the offset
459                  * is zero and has no name.
460                  */
461                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
462                 if (nodeoffset < 0) {
463                         /*
464                          * Not found or something else bad happened.
465                          */
466                         printf ("libfdt fdt_path_offset() returned %s\n",
467                                 fdt_strerror(nodeoffset));
468                         return 1;
469                 }
470                 /*
471                  * Do the delete.  A fourth parameter means delete a property,
472                  * otherwise delete the node.
473                  */
474                 if (argc > 3) {
475                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
476                         if (err < 0) {
477                                 printf("libfdt fdt_delprop():  %s\n",
478                                         fdt_strerror(err));
479                                 return err;
480                         }
481                 } else {
482                         err = fdt_del_node(working_fdt, nodeoffset);
483                         if (err < 0) {
484                                 printf("libfdt fdt_del_node():  %s\n",
485                                         fdt_strerror(err));
486                                 return err;
487                         }
488                 }
489
490         /*
491          * Display header info
492          */
493         } else if (argv[1][0] == 'h') {
494                 u32 version = fdt_version(working_fdt);
495                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
496                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
497                        fdt_totalsize(working_fdt));
498                 printf("off_dt_struct:\t\t0x%x\n",
499                        fdt_off_dt_struct(working_fdt));
500                 printf("off_dt_strings:\t\t0x%x\n",
501                        fdt_off_dt_strings(working_fdt));
502                 printf("off_mem_rsvmap:\t\t0x%x\n",
503                        fdt_off_mem_rsvmap(working_fdt));
504                 printf("version:\t\t%d\n", version);
505                 printf("last_comp_version:\t%d\n",
506                        fdt_last_comp_version(working_fdt));
507                 if (version >= 2)
508                         printf("boot_cpuid_phys:\t0x%x\n",
509                                 fdt_boot_cpuid_phys(working_fdt));
510                 if (version >= 3)
511                         printf("size_dt_strings:\t0x%x\n",
512                                 fdt_size_dt_strings(working_fdt));
513                 if (version >= 17)
514                         printf("size_dt_struct:\t\t0x%x\n",
515                                 fdt_size_dt_struct(working_fdt));
516                 printf("number mem_rsv:\t\t0x%x\n",
517                        fdt_num_mem_rsv(working_fdt));
518                 printf("\n");
519
520         /*
521          * Set boot cpu id
522          */
523         } else if (strncmp(argv[1], "boo", 3) == 0) {
524                 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
525                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
526
527         /*
528          * memory command
529          */
530         } else if (strncmp(argv[1], "me", 2) == 0) {
531                 uint64_t addr, size;
532                 int err;
533                 addr = simple_strtoull(argv[2], NULL, 16);
534                 size = simple_strtoull(argv[3], NULL, 16);
535                 err = fdt_fixup_memory(working_fdt, addr, size);
536                 if (err < 0)
537                         return err;
538
539         /*
540          * mem reserve commands
541          */
542         } else if (strncmp(argv[1], "rs", 2) == 0) {
543                 if (argv[2][0] == 'p') {
544                         uint64_t addr, size;
545                         int total = fdt_num_mem_rsv(working_fdt);
546                         int j, err;
547                         printf("index\t\t   start\t\t    size\n");
548                         printf("-------------------------------"
549                                 "-----------------\n");
550                         for (j = 0; j < total; j++) {
551                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
552                                 if (err < 0) {
553                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
554                                                         fdt_strerror(err));
555                                         return err;
556                                 }
557                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
558                                         (u32)(addr >> 32),
559                                         (u32)(addr & 0xffffffff),
560                                         (u32)(size >> 32),
561                                         (u32)(size & 0xffffffff));
562                         }
563                 } else if (argv[2][0] == 'a') {
564                         uint64_t addr, size;
565                         int err;
566                         addr = simple_strtoull(argv[3], NULL, 16);
567                         size = simple_strtoull(argv[4], NULL, 16);
568                         err = fdt_add_mem_rsv(working_fdt, addr, size);
569
570                         if (err < 0) {
571                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
572                                         fdt_strerror(err));
573                                 return err;
574                         }
575                 } else if (argv[2][0] == 'd') {
576                         unsigned long idx = simple_strtoul(argv[3], NULL, 16);
577                         int err = fdt_del_mem_rsv(working_fdt, idx);
578
579                         if (err < 0) {
580                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
581                                         fdt_strerror(err));
582                                 return err;
583                         }
584                 } else {
585                         /* Unrecognized command */
586                         return CMD_RET_USAGE;
587                 }
588         }
589 #ifdef CONFIG_OF_BOARD_SETUP
590         /* Call the board-specific fixup routine */
591         else if (strncmp(argv[1], "boa", 3) == 0) {
592                 int err = ft_board_setup(working_fdt, gd->bd);
593
594                 if (err) {
595                         printf("Failed to update board information in FDT: %s\n",
596                                fdt_strerror(err));
597                         return CMD_RET_FAILURE;
598                 }
599         }
600 #endif
601         /* Create a chosen node */
602         else if (strncmp(argv[1], "cho", 3) == 0) {
603                 unsigned long initrd_start = 0, initrd_end = 0;
604
605                 if ((argc != 2) && (argc != 4))
606                         return CMD_RET_USAGE;
607
608                 if (argc == 4) {
609                         initrd_start = simple_strtoul(argv[2], NULL, 16);
610                         initrd_end = simple_strtoul(argv[3], NULL, 16);
611                 }
612
613                 fdt_chosen(working_fdt);
614                 fdt_initrd(working_fdt, initrd_start, initrd_end);
615
616 #if defined(CONFIG_FIT_SIGNATURE)
617         } else if (strncmp(argv[1], "che", 3) == 0) {
618                 int cfg_noffset;
619                 int ret;
620                 unsigned long addr;
621                 struct fdt_header *blob;
622
623                 if (!working_fdt)
624                         return CMD_RET_FAILURE;
625
626                 if (argc > 2) {
627                         addr = simple_strtoul(argv[2], NULL, 16);
628                         blob = map_sysmem(addr, 0);
629                 } else {
630                         blob = (struct fdt_header *)gd->fdt_blob;
631                 }
632                 if (!fdt_valid(&blob))
633                         return 1;
634
635                 gd->fdt_blob = blob;
636                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
637                 if (!cfg_noffset) {
638                         printf("Could not find configuration node: %s\n",
639                                fdt_strerror(cfg_noffset));
640                         return CMD_RET_FAILURE;
641                 }
642
643                 ret = fit_config_verify(working_fdt, cfg_noffset);
644                 if (ret == 0)
645                         return CMD_RET_SUCCESS;
646                 else
647                         return CMD_RET_FAILURE;
648 #endif
649
650         }
651 #ifdef CONFIG_OF_LIBFDT_OVERLAY
652         /* apply an overlay */
653         else if (strncmp(argv[1], "ap", 2) == 0) {
654                 unsigned long addr;
655                 struct fdt_header *blob;
656                 int ret;
657
658                 if (argc != 3)
659                         return CMD_RET_USAGE;
660
661                 if (!working_fdt)
662                         return CMD_RET_FAILURE;
663
664                 addr = simple_strtoul(argv[2], NULL, 16);
665                 blob = map_sysmem(addr, 0);
666                 if (!fdt_valid(&blob))
667                         return CMD_RET_FAILURE;
668
669                 ret = fdt_overlay_apply(working_fdt, blob);
670                 if (ret) {
671                         printf("fdt_overlay_apply(): %s\n", fdt_strerror(ret));
672                         return CMD_RET_FAILURE;
673                 }
674         }
675 #endif
676         /* resize the fdt */
677         else if (strncmp(argv[1], "re", 2) == 0) {
678                 uint extrasize;
679                 if (argc > 2)
680                         extrasize = simple_strtoul(argv[2], NULL, 16);
681                 else
682                         extrasize = 0;
683                 fdt_shrink_to_minimum(working_fdt, extrasize);
684         }
685         else {
686                 /* Unrecognized command */
687                 return CMD_RET_USAGE;
688         }
689
690         return 0;
691 }
692
693 /****************************************************************************/
694
695 /**
696  * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
697  *
698  * @blobp: Pointer to FDT pointer
699  * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
700  */
701 static int fdt_valid(struct fdt_header **blobp)
702 {
703         const void *blob = *blobp;
704         int err;
705
706         if (blob == NULL) {
707                 printf ("The address of the fdt is invalid (NULL).\n");
708                 return 0;
709         }
710
711         err = fdt_check_header(blob);
712         if (err == 0)
713                 return 1;       /* valid */
714
715         if (err < 0) {
716                 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
717                 /*
718                  * Be more informative on bad version.
719                  */
720                 if (err == -FDT_ERR_BADVERSION) {
721                         if (fdt_version(blob) <
722                             FDT_FIRST_SUPPORTED_VERSION) {
723                                 printf (" - too old, fdt %d < %d",
724                                         fdt_version(blob),
725                                         FDT_FIRST_SUPPORTED_VERSION);
726                         }
727                         if (fdt_last_comp_version(blob) >
728                             FDT_LAST_SUPPORTED_VERSION) {
729                                 printf (" - too new, fdt %d > %d",
730                                         fdt_version(blob),
731                                         FDT_LAST_SUPPORTED_VERSION);
732                         }
733                 }
734                 printf("\n");
735                 *blobp = NULL;
736                 return 0;
737         }
738         return 1;
739 }
740
741 /****************************************************************************/
742
743 /*
744  * Parse the user's input, partially heuristic.  Valid formats:
745  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
746  *                      C conventions.
747  * [00 11 22 .. nn] - byte stream
748  * "string"     - If the the value doesn't start with "<" or "[", it is
749  *                      treated as a string.  Note that the quotes are
750  *                      stripped by the parser before we get the string.
751  * newval: An array of strings containing the new property as specified
752  *      on the command line
753  * count: The number of strings in the array
754  * data: A bytestream to be placed in the property
755  * len: The length of the resulting bytestream
756  */
757 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
758 {
759         char *cp;               /* temporary char pointer */
760         char *newp;             /* temporary newval char pointer */
761         unsigned long tmp;      /* holds converted values */
762         int stridx = 0;
763
764         *len = 0;
765         newp = newval[0];
766
767         /* An array of cells */
768         if (*newp == '<') {
769                 newp++;
770                 while ((*newp != '>') && (stridx < count)) {
771                         /*
772                          * Keep searching until we find that last ">"
773                          * That way users don't have to escape the spaces
774                          */
775                         if (*newp == '\0') {
776                                 newp = newval[++stridx];
777                                 continue;
778                         }
779
780                         cp = newp;
781                         tmp = simple_strtoul(cp, &newp, 0);
782                         if (*cp != '?')
783                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
784                         else
785                                 newp++;
786
787                         data  += 4;
788                         *len += 4;
789
790                         /* If the ptr didn't advance, something went wrong */
791                         if ((newp - cp) <= 0) {
792                                 printf("Sorry, I could not convert \"%s\"\n",
793                                         cp);
794                                 return 1;
795                         }
796
797                         while (*newp == ' ')
798                                 newp++;
799                 }
800
801                 if (*newp != '>') {
802                         printf("Unexpected character '%c'\n", *newp);
803                         return 1;
804                 }
805         } else if (*newp == '[') {
806                 /*
807                  * Byte stream.  Convert the values.
808                  */
809                 newp++;
810                 while ((stridx < count) && (*newp != ']')) {
811                         while (*newp == ' ')
812                                 newp++;
813                         if (*newp == '\0') {
814                                 newp = newval[++stridx];
815                                 continue;
816                         }
817                         if (!isxdigit(*newp))
818                                 break;
819                         tmp = simple_strtoul(newp, &newp, 16);
820                         *data++ = tmp & 0xFF;
821                         *len    = *len + 1;
822                 }
823                 if (*newp != ']') {
824                         printf("Unexpected character '%c'\n", *newp);
825                         return 1;
826                 }
827         } else {
828                 /*
829                  * Assume it is one or more strings.  Copy it into our
830                  * data area for convenience (including the
831                  * terminating '\0's).
832                  */
833                 while (stridx < count) {
834                         size_t length = strlen(newp) + 1;
835                         strcpy(data, newp);
836                         data += length;
837                         *len += length;
838                         newp = newval[++stridx];
839                 }
840         }
841         return 0;
842 }
843
844 /****************************************************************************/
845
846 /*
847  * Heuristic to guess if this is a string or concatenated strings.
848  */
849
850 static int is_printable_string(const void *data, int len)
851 {
852         const char *s = data;
853
854         /* zero length is not */
855         if (len == 0)
856                 return 0;
857
858         /* must terminate with zero or '\n' */
859         if (s[len - 1] != '\0' && s[len - 1] != '\n')
860                 return 0;
861
862         /* printable or a null byte (concatenated strings) */
863         while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
864                 /*
865                  * If we see a null, there are three possibilities:
866                  * 1) If len == 1, it is the end of the string, printable
867                  * 2) Next character also a null, not printable.
868                  * 3) Next character not a null, continue to check.
869                  */
870                 if (s[0] == '\0') {
871                         if (len == 1)
872                                 return 1;
873                         if (s[1] == '\0')
874                                 return 0;
875                 }
876                 s++;
877                 len--;
878         }
879
880         /* Not the null termination, or not done yet: not printable */
881         if (*s != '\0' || (len != 0))
882                 return 0;
883
884         return 1;
885 }
886
887
888 /*
889  * Print the property in the best format, a heuristic guess.  Print as
890  * a string, concatenated strings, a byte, word, double word, or (if all
891  * else fails) it is printed as a stream of bytes.
892  */
893 static void print_data(const void *data, int len)
894 {
895         int j;
896
897         /* no data, don't print */
898         if (len == 0)
899                 return;
900
901         /*
902          * It is a string, but it may have multiple strings (embedded '\0's).
903          */
904         if (is_printable_string(data, len)) {
905                 puts("\"");
906                 j = 0;
907                 while (j < len) {
908                         if (j > 0)
909                                 puts("\", \"");
910                         puts(data);
911                         j    += strlen(data) + 1;
912                         data += strlen(data) + 1;
913                 }
914                 puts("\"");
915                 return;
916         }
917
918         if ((len %4) == 0) {
919                 if (len > CMD_FDT_MAX_DUMP)
920                         printf("* 0x%p [0x%08x]", data, len);
921                 else {
922                         const __be32 *p;
923
924                         printf("<");
925                         for (j = 0, p = data; j < len/4; j++)
926                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
927                                         j < (len/4 - 1) ? " " : "");
928                         printf(">");
929                 }
930         } else { /* anything else... hexdump */
931                 if (len > CMD_FDT_MAX_DUMP)
932                         printf("* 0x%p [0x%08x]", data, len);
933                 else {
934                         const u8 *s;
935
936                         printf("[");
937                         for (j = 0, s = data; j < len; j++)
938                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
939                         printf("]");
940                 }
941         }
942 }
943
944 /****************************************************************************/
945
946 /*
947  * Recursively print (a portion of) the working_fdt.  The depth parameter
948  * determines how deeply nested the fdt is printed.
949  */
950 static int fdt_print(const char *pathp, char *prop, int depth)
951 {
952         static char tabs[MAX_LEVEL+1] =
953                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
954                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
955         const void *nodep;      /* property node pointer */
956         int  nodeoffset;        /* node offset from libfdt */
957         int  nextoffset;        /* next node offset from libfdt */
958         uint32_t tag;           /* tag */
959         int  len;               /* length of the property */
960         int  level = 0;         /* keep track of nesting level */
961         const struct fdt_property *fdt_prop;
962
963         nodeoffset = fdt_path_offset (working_fdt, pathp);
964         if (nodeoffset < 0) {
965                 /*
966                  * Not found or something else bad happened.
967                  */
968                 printf ("libfdt fdt_path_offset() returned %s\n",
969                         fdt_strerror(nodeoffset));
970                 return 1;
971         }
972         /*
973          * The user passed in a property as well as node path.
974          * Print only the given property and then return.
975          */
976         if (prop) {
977                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
978                 if (len == 0) {
979                         /* no property value */
980                         printf("%s %s\n", pathp, prop);
981                         return 0;
982                 } else if (nodep && len > 0) {
983                         printf("%s = ", prop);
984                         print_data (nodep, len);
985                         printf("\n");
986                         return 0;
987                 } else {
988                         printf ("libfdt fdt_getprop(): %s\n",
989                                 fdt_strerror(len));
990                         return 1;
991                 }
992         }
993
994         /*
995          * The user passed in a node path and no property,
996          * print the node and all subnodes.
997          */
998         while(level >= 0) {
999                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1000                 switch(tag) {
1001                 case FDT_BEGIN_NODE:
1002                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1003                         if (level <= depth) {
1004                                 if (pathp == NULL)
1005                                         pathp = "/* NULL pointer error */";
1006                                 if (*pathp == '\0')
1007                                         pathp = "/";    /* root is nameless */
1008                                 printf("%s%s {\n",
1009                                         &tabs[MAX_LEVEL - level], pathp);
1010                         }
1011                         level++;
1012                         if (level >= MAX_LEVEL) {
1013                                 printf("Nested too deep, aborting.\n");
1014                                 return 1;
1015                         }
1016                         break;
1017                 case FDT_END_NODE:
1018                         level--;
1019                         if (level <= depth)
1020                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1021                         if (level == 0) {
1022                                 level = -1;             /* exit the loop */
1023                         }
1024                         break;
1025                 case FDT_PROP:
1026                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1027                                         sizeof(*fdt_prop));
1028                         pathp    = fdt_string(working_fdt,
1029                                         fdt32_to_cpu(fdt_prop->nameoff));
1030                         len      = fdt32_to_cpu(fdt_prop->len);
1031                         nodep    = fdt_prop->data;
1032                         if (len < 0) {
1033                                 printf ("libfdt fdt_getprop(): %s\n",
1034                                         fdt_strerror(len));
1035                                 return 1;
1036                         } else if (len == 0) {
1037                                 /* the property has no value */
1038                                 if (level <= depth)
1039                                         printf("%s%s;\n",
1040                                                 &tabs[MAX_LEVEL - level],
1041                                                 pathp);
1042                         } else {
1043                                 if (level <= depth) {
1044                                         printf("%s%s = ",
1045                                                 &tabs[MAX_LEVEL - level],
1046                                                 pathp);
1047                                         print_data (nodep, len);
1048                                         printf(";\n");
1049                                 }
1050                         }
1051                         break;
1052                 case FDT_NOP:
1053                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1054                         break;
1055                 case FDT_END:
1056                         return 1;
1057                 default:
1058                         if (level <= depth)
1059                                 printf("Unknown tag 0x%08X\n", tag);
1060                         return 1;
1061                 }
1062                 nodeoffset = nextoffset;
1063         }
1064         return 0;
1065 }
1066
1067 /********************************************************************/
1068 #ifdef CONFIG_SYS_LONGHELP
1069 static char fdt_help_text[] =
1070         "addr [-c]  <addr> [<length>]   - Set the [control] fdt location to <addr>\n"
1071 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1072         "fdt apply <addr>                    - Apply overlay to the DT\n"
1073 #endif
1074 #ifdef CONFIG_OF_BOARD_SETUP
1075         "fdt boardsetup                      - Do board-specific set up\n"
1076 #endif
1077 #ifdef CONFIG_OF_SYSTEM_SETUP
1078         "fdt systemsetup                     - Do system-specific set up\n"
1079 #endif
1080         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1081         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1082         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1083         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1084         "fdt get value <var> <path> <prop>   - Get <property> and store in <var>\n"
1085         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1086         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1087         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1088         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1089         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1090         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1091         "fdt header                          - Display header info\n"
1092         "fdt bootcpu <id>                    - Set boot cpuid\n"
1093         "fdt memory <addr> <size>            - Add/Update memory node\n"
1094         "fdt rsvmem print                    - Show current mem reserves\n"
1095         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1096         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1097         "fdt chosen [<start> <end>]          - Add/update the /chosen branch in the tree\n"
1098         "                                        <start>/<end> - initrd start/end addr\n"
1099 #if defined(CONFIG_FIT_SIGNATURE)
1100         "fdt checksign [<addr>]              - check FIT signature\n"
1101         "                                        <start> - addr of key blob\n"
1102         "                                                  default gd->fdt_blob\n"
1103 #endif
1104         "NOTE: Dereference aliases by omitting the leading '/', "
1105                 "e.g. fdt print ethernet0.";
1106 #endif
1107
1108 U_BOOT_CMD(
1109         fdt,    255,    0,      do_fdt,
1110         "flattened device tree utility commands", fdt_help_text
1111 );