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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 <asm/io.h>
19
20 #define MAX_LEVEL       32              /* how deeply nested we will go */
21 #define SCRATCHPAD      1024            /* bytes of scratchpad memory */
22 #ifndef CONFIG_CMD_FDT_MAX_DUMP
23 #define CONFIG_CMD_FDT_MAX_DUMP 64
24 #endif
25
26 /*
27  * Global data (for the gd->bd)
28  */
29 DECLARE_GLOBAL_DATA_PTR;
30
31 static int fdt_valid(struct fdt_header **blobp);
32 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
33 static int fdt_print(const char *pathp, char *prop, int depth);
34 static int is_printable_string(const void *data, int len);
35
36 /*
37  * The working_fdt points to our working flattened device tree.
38  */
39 struct fdt_header *working_fdt;
40
41 void set_working_fdt_addr(void *addr)
42 {
43         void *buf;
44
45         buf = map_sysmem((ulong)addr, 0);
46         working_fdt = buf;
47         setenv_addr("fdtaddr", addr);
48 }
49
50 /*
51  * Get a value from the fdt and format it to be set in the environment
52  */
53 static int fdt_value_setenv(const void *nodep, int len, const char *var)
54 {
55         if (is_printable_string(nodep, len))
56                 setenv(var, (void *)nodep);
57         else if (len == 4) {
58                 char buf[11];
59
60                 sprintf(buf, "0x%08X", *(uint32_t *)nodep);
61                 setenv(var, buf);
62         } else if (len%4 == 0 && len <= 20) {
63                 /* Needed to print things like sha1 hashes. */
64                 char buf[41];
65                 int i;
66
67                 for (i = 0; i < len; i += sizeof(unsigned int))
68                         sprintf(buf + (i * 2), "%08x",
69                                 *(unsigned int *)(nodep + i));
70                 setenv(var, buf);
71         } else {
72                 printf("error: unprintable value\n");
73                 return 1;
74         }
75         return 0;
76 }
77
78 /*
79  * Flattened Device Tree command, see the help for parameter definitions.
80  */
81 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
82 {
83         if (argc < 2)
84                 return CMD_RET_USAGE;
85
86         /*
87          * Set the address of the fdt
88          */
89         if (argv[1][0] == 'a') {
90                 unsigned long addr;
91                 int control = 0;
92                 struct fdt_header *blob;
93                 /*
94                  * Set the address [and length] of the fdt.
95                  */
96                 argc -= 2;
97                 argv += 2;
98 /* Temporary #ifdef - some archs don't have fdt_blob yet */
99 #ifdef CONFIG_OF_CONTROL
100                 if (argc && !strcmp(*argv, "-c")) {
101                         control = 1;
102                         argc--;
103                         argv++;
104                 }
105 #endif
106                 if (argc == 0) {
107                         if (control)
108                                 blob = (struct fdt_header *)gd->fdt_blob;
109                         else
110                                 blob = working_fdt;
111                         if (!blob || !fdt_valid(&blob))
112                                 return 1;
113                         printf("The address of the fdt is %#08lx\n",
114                                control ? (ulong)blob :
115                                         getenv_hex("fdtaddr", 0));
116                         return 0;
117                 }
118
119                 addr = simple_strtoul(argv[0], NULL, 16);
120                 blob = map_sysmem(addr, 0);
121                 if (!fdt_valid(&blob))
122                         return 1;
123                 if (control)
124                         gd->fdt_blob = blob;
125                 else
126                         set_working_fdt_addr(blob);
127
128                 if (argc >= 2) {
129                         int  len;
130                         int  err;
131                         /*
132                          * Optional new length
133                          */
134                         len = simple_strtoul(argv[1], NULL, 16);
135                         if (len < fdt_totalsize(blob)) {
136                                 printf ("New length %d < existing length %d, "
137                                         "ignoring.\n",
138                                         len, fdt_totalsize(blob));
139                         } else {
140                                 /*
141                                  * Open in place with a new length.
142                                  */
143                                 err = fdt_open_into(blob, blob, len);
144                                 if (err != 0) {
145                                         printf ("libfdt fdt_open_into(): %s\n",
146                                                 fdt_strerror(err));
147                                 }
148                         }
149                 }
150
151                 return CMD_RET_SUCCESS;
152         }
153
154         if (!working_fdt) {
155                 puts(
156                         "No FDT memory address configured. Please configure\n"
157                         "the FDT address via \"fdt addr <address>\" command.\n"
158                         "Aborting!\n");
159                 return CMD_RET_FAILURE;
160         }
161
162         /*
163          * Move the working_fdt
164          */
165         if (strncmp(argv[1], "mo", 2) == 0) {
166                 struct fdt_header *newaddr;
167                 int  len;
168                 int  err;
169
170                 if (argc < 4)
171                         return CMD_RET_USAGE;
172
173                 /*
174                  * Set the address and length of the fdt.
175                  */
176                 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
177                 if (!fdt_valid(&working_fdt))
178                         return 1;
179
180                 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
181
182                 /*
183                  * If the user specifies a length, use that.  Otherwise use the
184                  * current length.
185                  */
186                 if (argc <= 4) {
187                         len = fdt_totalsize(working_fdt);
188                 } else {
189                         len = simple_strtoul(argv[4], NULL, 16);
190                         if (len < fdt_totalsize(working_fdt)) {
191                                 printf ("New length 0x%X < existing length "
192                                         "0x%X, aborting.\n",
193                                         len, fdt_totalsize(working_fdt));
194                                 return 1;
195                         }
196                 }
197
198                 /*
199                  * Copy to the new location.
200                  */
201                 err = fdt_open_into(working_fdt, newaddr, len);
202                 if (err != 0) {
203                         printf ("libfdt fdt_open_into(): %s\n",
204                                 fdt_strerror(err));
205                         return 1;
206                 }
207                 working_fdt = newaddr;
208
209         /*
210          * Make a new node
211          */
212         } else if (strncmp(argv[1], "mk", 2) == 0) {
213                 char *pathp;            /* path */
214                 char *nodep;            /* new node to add */
215                 int  nodeoffset;        /* node offset from libfdt */
216                 int  err;
217
218                 /*
219                  * Parameters: Node path, new node to be appended to the path.
220                  */
221                 if (argc < 4)
222                         return CMD_RET_USAGE;
223
224                 pathp = argv[2];
225                 nodep = argv[3];
226
227                 nodeoffset = fdt_path_offset (working_fdt, pathp);
228                 if (nodeoffset < 0) {
229                         /*
230                          * Not found or something else bad happened.
231                          */
232                         printf ("libfdt fdt_path_offset() returned %s\n",
233                                 fdt_strerror(nodeoffset));
234                         return 1;
235                 }
236                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
237                 if (err < 0) {
238                         printf ("libfdt fdt_add_subnode(): %s\n",
239                                 fdt_strerror(err));
240                         return 1;
241                 }
242
243         /*
244          * Set the value of a property in the working_fdt.
245          */
246         } else if (argv[1][0] == 's') {
247                 char *pathp;            /* path */
248                 char *prop;             /* property */
249                 int  nodeoffset;        /* node offset from libfdt */
250                 static char data[SCRATCHPAD];   /* storage for the property */
251                 int  len;               /* new length of the property */
252                 int  ret;               /* return value */
253
254                 /*
255                  * Parameters: Node path, property, optional value.
256                  */
257                 if (argc < 4)
258                         return CMD_RET_USAGE;
259
260                 pathp  = argv[2];
261                 prop   = argv[3];
262                 if (argc == 4) {
263                         len = 0;
264                 } else {
265                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
266                         if (ret != 0)
267                                 return ret;
268                 }
269
270                 nodeoffset = fdt_path_offset (working_fdt, pathp);
271                 if (nodeoffset < 0) {
272                         /*
273                          * Not found or something else bad happened.
274                          */
275                         printf ("libfdt fdt_path_offset() returned %s\n",
276                                 fdt_strerror(nodeoffset));
277                         return 1;
278                 }
279
280                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
281                 if (ret < 0) {
282                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
283                         return 1;
284                 }
285
286         /********************************************************************
287          * Get the value of a property in the working_fdt.
288          ********************************************************************/
289         } else if (argv[1][0] == 'g') {
290                 char *subcmd;           /* sub-command */
291                 char *pathp;            /* path */
292                 char *prop;             /* property */
293                 char *var;              /* variable to store result */
294                 int  nodeoffset;        /* node offset from libfdt */
295                 const void *nodep;      /* property node pointer */
296                 int  len = 0;           /* new length of the property */
297
298                 /*
299                  * Parameters: Node path, property, optional value.
300                  */
301                 if (argc < 5)
302                         return CMD_RET_USAGE;
303
304                 subcmd = argv[2];
305
306                 if (argc < 6 && subcmd[0] != 's')
307                         return CMD_RET_USAGE;
308
309                 var    = argv[3];
310                 pathp  = argv[4];
311                 prop   = argv[5];
312
313                 nodeoffset = fdt_path_offset(working_fdt, pathp);
314                 if (nodeoffset < 0) {
315                         /*
316                          * Not found or something else bad happened.
317                          */
318                         printf("libfdt fdt_path_offset() returned %s\n",
319                                 fdt_strerror(nodeoffset));
320                         return 1;
321                 }
322
323                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
324                         int reqIndex = -1;
325                         int startDepth = fdt_node_depth(
326                                 working_fdt, nodeoffset);
327                         int curDepth = startDepth;
328                         int curIndex = -1;
329                         int nextNodeOffset = fdt_next_node(
330                                 working_fdt, nodeoffset, &curDepth);
331
332                         if (subcmd[0] == 'n')
333                                 reqIndex = simple_strtoul(argv[5], NULL, 16);
334
335                         while (curDepth > startDepth) {
336                                 if (curDepth == startDepth + 1)
337                                         curIndex++;
338                                 if (subcmd[0] == 'n' && curIndex == reqIndex) {
339                                         const char *nodeName = fdt_get_name(
340                                             working_fdt, nextNodeOffset, NULL);
341
342                                         setenv(var, (char *)nodeName);
343                                         return 0;
344                                 }
345                                 nextNodeOffset = fdt_next_node(
346                                         working_fdt, nextNodeOffset, &curDepth);
347                                 if (nextNodeOffset < 0)
348                                         break;
349                         }
350                         if (subcmd[0] == 's') {
351                                 /* get the num nodes at this level */
352                                 setenv_ulong(var, curIndex + 1);
353                         } else {
354                                 /* node index not found */
355                                 printf("libfdt node not found\n");
356                                 return 1;
357                         }
358                 } else {
359                         nodep = fdt_getprop(
360                                 working_fdt, nodeoffset, prop, &len);
361                         if (len == 0) {
362                                 /* no property value */
363                                 setenv(var, "");
364                                 return 0;
365                         } else if (len > 0) {
366                                 if (subcmd[0] == 'v') {
367                                         int ret;
368
369                                         ret = fdt_value_setenv(nodep, len, var);
370                                         if (ret != 0)
371                                                 return ret;
372                                 } else if (subcmd[0] == 'a') {
373                                         /* Get address */
374                                         char buf[11];
375
376                                         sprintf(buf, "0x%p", nodep);
377                                         setenv(var, buf);
378                                 } else if (subcmd[0] == 's') {
379                                         /* Get size */
380                                         char buf[11];
381
382                                         sprintf(buf, "0x%08X", len);
383                                         setenv(var, buf);
384                                 } else
385                                         return CMD_RET_USAGE;
386                                 return 0;
387                         } else {
388                                 printf("libfdt fdt_getprop(): %s\n",
389                                         fdt_strerror(len));
390                                 return 1;
391                         }
392                 }
393
394         /*
395          * Print (recursive) / List (single level)
396          */
397         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
398                 int depth = MAX_LEVEL;  /* how deep to print */
399                 char *pathp;            /* path */
400                 char *prop;             /* property */
401                 int  ret;               /* return value */
402                 static char root[2] = "/";
403
404                 /*
405                  * list is an alias for print, but limited to 1 level
406                  */
407                 if (argv[1][0] == 'l') {
408                         depth = 1;
409                 }
410
411                 /*
412                  * Get the starting path.  The root node is an oddball,
413                  * the offset is zero and has no name.
414                  */
415                 if (argc == 2)
416                         pathp = root;
417                 else
418                         pathp = argv[2];
419                 if (argc > 3)
420                         prop = argv[3];
421                 else
422                         prop = NULL;
423
424                 ret = fdt_print(pathp, prop, depth);
425                 if (ret != 0)
426                         return ret;
427
428         /*
429          * Remove a property/node
430          */
431         } else if (strncmp(argv[1], "rm", 2) == 0) {
432                 int  nodeoffset;        /* node offset from libfdt */
433                 int  err;
434
435                 /*
436                  * Get the path.  The root node is an oddball, the offset
437                  * is zero and has no name.
438                  */
439                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
440                 if (nodeoffset < 0) {
441                         /*
442                          * Not found or something else bad happened.
443                          */
444                         printf ("libfdt fdt_path_offset() returned %s\n",
445                                 fdt_strerror(nodeoffset));
446                         return 1;
447                 }
448                 /*
449                  * Do the delete.  A fourth parameter means delete a property,
450                  * otherwise delete the node.
451                  */
452                 if (argc > 3) {
453                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
454                         if (err < 0) {
455                                 printf("libfdt fdt_delprop():  %s\n",
456                                         fdt_strerror(err));
457                                 return err;
458                         }
459                 } else {
460                         err = fdt_del_node(working_fdt, nodeoffset);
461                         if (err < 0) {
462                                 printf("libfdt fdt_del_node():  %s\n",
463                                         fdt_strerror(err));
464                                 return err;
465                         }
466                 }
467
468         /*
469          * Display header info
470          */
471         } else if (argv[1][0] == 'h') {
472                 u32 version = fdt_version(working_fdt);
473                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
474                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
475                        fdt_totalsize(working_fdt));
476                 printf("off_dt_struct:\t\t0x%x\n",
477                        fdt_off_dt_struct(working_fdt));
478                 printf("off_dt_strings:\t\t0x%x\n",
479                        fdt_off_dt_strings(working_fdt));
480                 printf("off_mem_rsvmap:\t\t0x%x\n",
481                        fdt_off_mem_rsvmap(working_fdt));
482                 printf("version:\t\t%d\n", version);
483                 printf("last_comp_version:\t%d\n",
484                        fdt_last_comp_version(working_fdt));
485                 if (version >= 2)
486                         printf("boot_cpuid_phys:\t0x%x\n",
487                                 fdt_boot_cpuid_phys(working_fdt));
488                 if (version >= 3)
489                         printf("size_dt_strings:\t0x%x\n",
490                                 fdt_size_dt_strings(working_fdt));
491                 if (version >= 17)
492                         printf("size_dt_struct:\t\t0x%x\n",
493                                 fdt_size_dt_struct(working_fdt));
494                 printf("number mem_rsv:\t\t0x%x\n",
495                        fdt_num_mem_rsv(working_fdt));
496                 printf("\n");
497
498         /*
499          * Set boot cpu id
500          */
501         } else if (strncmp(argv[1], "boo", 3) == 0) {
502                 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
503                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
504
505         /*
506          * memory command
507          */
508         } else if (strncmp(argv[1], "me", 2) == 0) {
509                 uint64_t addr, size;
510                 int err;
511                 addr = simple_strtoull(argv[2], NULL, 16);
512                 size = simple_strtoull(argv[3], NULL, 16);
513                 err = fdt_fixup_memory(working_fdt, addr, size);
514                 if (err < 0)
515                         return err;
516
517         /*
518          * mem reserve commands
519          */
520         } else if (strncmp(argv[1], "rs", 2) == 0) {
521                 if (argv[2][0] == 'p') {
522                         uint64_t addr, size;
523                         int total = fdt_num_mem_rsv(working_fdt);
524                         int j, err;
525                         printf("index\t\t   start\t\t    size\n");
526                         printf("-------------------------------"
527                                 "-----------------\n");
528                         for (j = 0; j < total; j++) {
529                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
530                                 if (err < 0) {
531                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
532                                                         fdt_strerror(err));
533                                         return err;
534                                 }
535                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
536                                         (u32)(addr >> 32),
537                                         (u32)(addr & 0xffffffff),
538                                         (u32)(size >> 32),
539                                         (u32)(size & 0xffffffff));
540                         }
541                 } else if (argv[2][0] == 'a') {
542                         uint64_t addr, size;
543                         int err;
544                         addr = simple_strtoull(argv[3], NULL, 16);
545                         size = simple_strtoull(argv[4], NULL, 16);
546                         err = fdt_add_mem_rsv(working_fdt, addr, size);
547
548                         if (err < 0) {
549                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
550                                         fdt_strerror(err));
551                                 return err;
552                         }
553                 } else if (argv[2][0] == 'd') {
554                         unsigned long idx = simple_strtoul(argv[3], NULL, 16);
555                         int err = fdt_del_mem_rsv(working_fdt, idx);
556
557                         if (err < 0) {
558                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
559                                         fdt_strerror(err));
560                                 return err;
561                         }
562                 } else {
563                         /* Unrecognized command */
564                         return CMD_RET_USAGE;
565                 }
566         }
567 #ifdef CONFIG_OF_BOARD_SETUP
568         /* Call the board-specific fixup routine */
569         else if (strncmp(argv[1], "boa", 3) == 0)
570                 ft_board_setup(working_fdt, gd->bd);
571 #endif
572         /* Create a chosen node */
573         else if (strncmp(argv[1], "cho", 3) == 0) {
574                 unsigned long initrd_start = 0, initrd_end = 0;
575
576                 if ((argc != 2) && (argc != 4))
577                         return CMD_RET_USAGE;
578
579                 if (argc == 4) {
580                         initrd_start = simple_strtoul(argv[2], NULL, 16);
581                         initrd_end = simple_strtoul(argv[3], NULL, 16);
582                 }
583
584                 fdt_chosen(working_fdt, 1);
585                 fdt_initrd(working_fdt, initrd_start, initrd_end, 1);
586
587 #if defined(CONFIG_FIT_SIGNATURE)
588         } else if (strncmp(argv[1], "che", 3) == 0) {
589                 int cfg_noffset;
590                 int ret;
591                 unsigned long addr;
592                 struct fdt_header *blob;
593
594                 if (!working_fdt)
595                         return CMD_RET_FAILURE;
596
597                 if (argc > 2) {
598                         addr = simple_strtoul(argv[2], NULL, 16);
599                         blob = map_sysmem(addr, 0);
600                 } else {
601                         blob = (struct fdt_header *)gd->fdt_blob;
602                 }
603                 if (!fdt_valid(&blob))
604                         return 1;
605
606                 gd->fdt_blob = blob;
607                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
608                 if (!cfg_noffset) {
609                         printf("Could not find configuration node: %s\n",
610                                fdt_strerror(cfg_noffset));
611                         return CMD_RET_FAILURE;
612                 }
613
614                 ret = fit_config_verify(working_fdt, cfg_noffset);
615                 if (ret == 1)
616                         return CMD_RET_SUCCESS;
617                 else
618                         return CMD_RET_FAILURE;
619 #endif
620
621         }
622         /* resize the fdt */
623         else if (strncmp(argv[1], "re", 2) == 0) {
624                 fdt_resize(working_fdt);
625         }
626         else {
627                 /* Unrecognized command */
628                 return CMD_RET_USAGE;
629         }
630
631         return 0;
632 }
633
634 /****************************************************************************/
635
636 /**
637  * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
638  *
639  * @blobp: Pointer to FDT pointer
640  * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
641  */
642 static int fdt_valid(struct fdt_header **blobp)
643 {
644         const void *blob = *blobp;
645         int err;
646
647         if (blob == NULL) {
648                 printf ("The address of the fdt is invalid (NULL).\n");
649                 return 0;
650         }
651
652         err = fdt_check_header(blob);
653         if (err == 0)
654                 return 1;       /* valid */
655
656         if (err < 0) {
657                 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
658                 /*
659                  * Be more informative on bad version.
660                  */
661                 if (err == -FDT_ERR_BADVERSION) {
662                         if (fdt_version(blob) <
663                             FDT_FIRST_SUPPORTED_VERSION) {
664                                 printf (" - too old, fdt %d < %d",
665                                         fdt_version(blob),
666                                         FDT_FIRST_SUPPORTED_VERSION);
667                         }
668                         if (fdt_last_comp_version(blob) >
669                             FDT_LAST_SUPPORTED_VERSION) {
670                                 printf (" - too new, fdt %d > %d",
671                                         fdt_version(blob),
672                                         FDT_LAST_SUPPORTED_VERSION);
673                         }
674                 }
675                 printf("\n");
676                 *blobp = NULL;
677                 return 0;
678         }
679         return 1;
680 }
681
682 /****************************************************************************/
683
684 /*
685  * Parse the user's input, partially heuristic.  Valid formats:
686  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
687  *                      C conventions.
688  * [00 11 22 .. nn] - byte stream
689  * "string"     - If the the value doesn't start with "<" or "[", it is
690  *                      treated as a string.  Note that the quotes are
691  *                      stripped by the parser before we get the string.
692  * newval: An array of strings containing the new property as specified
693  *      on the command line
694  * count: The number of strings in the array
695  * data: A bytestream to be placed in the property
696  * len: The length of the resulting bytestream
697  */
698 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
699 {
700         char *cp;               /* temporary char pointer */
701         char *newp;             /* temporary newval char pointer */
702         unsigned long tmp;      /* holds converted values */
703         int stridx = 0;
704
705         *len = 0;
706         newp = newval[0];
707
708         /* An array of cells */
709         if (*newp == '<') {
710                 newp++;
711                 while ((*newp != '>') && (stridx < count)) {
712                         /*
713                          * Keep searching until we find that last ">"
714                          * That way users don't have to escape the spaces
715                          */
716                         if (*newp == '\0') {
717                                 newp = newval[++stridx];
718                                 continue;
719                         }
720
721                         cp = newp;
722                         tmp = simple_strtoul(cp, &newp, 0);
723                         *(__be32 *)data = __cpu_to_be32(tmp);
724                         data  += 4;
725                         *len += 4;
726
727                         /* If the ptr didn't advance, something went wrong */
728                         if ((newp - cp) <= 0) {
729                                 printf("Sorry, I could not convert \"%s\"\n",
730                                         cp);
731                                 return 1;
732                         }
733
734                         while (*newp == ' ')
735                                 newp++;
736                 }
737
738                 if (*newp != '>') {
739                         printf("Unexpected character '%c'\n", *newp);
740                         return 1;
741                 }
742         } else if (*newp == '[') {
743                 /*
744                  * Byte stream.  Convert the values.
745                  */
746                 newp++;
747                 while ((stridx < count) && (*newp != ']')) {
748                         while (*newp == ' ')
749                                 newp++;
750                         if (*newp == '\0') {
751                                 newp = newval[++stridx];
752                                 continue;
753                         }
754                         if (!isxdigit(*newp))
755                                 break;
756                         tmp = simple_strtoul(newp, &newp, 16);
757                         *data++ = tmp & 0xFF;
758                         *len    = *len + 1;
759                 }
760                 if (*newp != ']') {
761                         printf("Unexpected character '%c'\n", *newp);
762                         return 1;
763                 }
764         } else {
765                 /*
766                  * Assume it is one or more strings.  Copy it into our
767                  * data area for convenience (including the
768                  * terminating '\0's).
769                  */
770                 while (stridx < count) {
771                         size_t length = strlen(newp) + 1;
772                         strcpy(data, newp);
773                         data += length;
774                         *len += length;
775                         newp = newval[++stridx];
776                 }
777         }
778         return 0;
779 }
780
781 /****************************************************************************/
782
783 /*
784  * Heuristic to guess if this is a string or concatenated strings.
785  */
786
787 static int is_printable_string(const void *data, int len)
788 {
789         const char *s = data;
790
791         /* zero length is not */
792         if (len == 0)
793                 return 0;
794
795         /* must terminate with zero or '\n' */
796         if (s[len - 1] != '\0' && s[len - 1] != '\n')
797                 return 0;
798
799         /* printable or a null byte (concatenated strings) */
800         while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
801                 /*
802                  * If we see a null, there are three possibilities:
803                  * 1) If len == 1, it is the end of the string, printable
804                  * 2) Next character also a null, not printable.
805                  * 3) Next character not a null, continue to check.
806                  */
807                 if (s[0] == '\0') {
808                         if (len == 1)
809                                 return 1;
810                         if (s[1] == '\0')
811                                 return 0;
812                 }
813                 s++;
814                 len--;
815         }
816
817         /* Not the null termination, or not done yet: not printable */
818         if (*s != '\0' || (len != 0))
819                 return 0;
820
821         return 1;
822 }
823
824
825 /*
826  * Print the property in the best format, a heuristic guess.  Print as
827  * a string, concatenated strings, a byte, word, double word, or (if all
828  * else fails) it is printed as a stream of bytes.
829  */
830 static void print_data(const void *data, int len)
831 {
832         int j;
833
834         /* no data, don't print */
835         if (len == 0)
836                 return;
837
838         /*
839          * It is a string, but it may have multiple strings (embedded '\0's).
840          */
841         if (is_printable_string(data, len)) {
842                 puts("\"");
843                 j = 0;
844                 while (j < len) {
845                         if (j > 0)
846                                 puts("\", \"");
847                         puts(data);
848                         j    += strlen(data) + 1;
849                         data += strlen(data) + 1;
850                 }
851                 puts("\"");
852                 return;
853         }
854
855         if ((len %4) == 0) {
856                 if (len > CONFIG_CMD_FDT_MAX_DUMP)
857                         printf("* 0x%p [0x%08x]", data, len);
858                 else {
859                         const __be32 *p;
860
861                         printf("<");
862                         for (j = 0, p = data; j < len/4; j++)
863                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
864                                         j < (len/4 - 1) ? " " : "");
865                         printf(">");
866                 }
867         } else { /* anything else... hexdump */
868                 if (len > CONFIG_CMD_FDT_MAX_DUMP)
869                         printf("* 0x%p [0x%08x]", data, len);
870                 else {
871                         const u8 *s;
872
873                         printf("[");
874                         for (j = 0, s = data; j < len; j++)
875                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
876                         printf("]");
877                 }
878         }
879 }
880
881 /****************************************************************************/
882
883 /*
884  * Recursively print (a portion of) the working_fdt.  The depth parameter
885  * determines how deeply nested the fdt is printed.
886  */
887 static int fdt_print(const char *pathp, char *prop, int depth)
888 {
889         static char tabs[MAX_LEVEL+1] =
890                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
891                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
892         const void *nodep;      /* property node pointer */
893         int  nodeoffset;        /* node offset from libfdt */
894         int  nextoffset;        /* next node offset from libfdt */
895         uint32_t tag;           /* tag */
896         int  len;               /* length of the property */
897         int  level = 0;         /* keep track of nesting level */
898         const struct fdt_property *fdt_prop;
899
900         nodeoffset = fdt_path_offset (working_fdt, pathp);
901         if (nodeoffset < 0) {
902                 /*
903                  * Not found or something else bad happened.
904                  */
905                 printf ("libfdt fdt_path_offset() returned %s\n",
906                         fdt_strerror(nodeoffset));
907                 return 1;
908         }
909         /*
910          * The user passed in a property as well as node path.
911          * Print only the given property and then return.
912          */
913         if (prop) {
914                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
915                 if (len == 0) {
916                         /* no property value */
917                         printf("%s %s\n", pathp, prop);
918                         return 0;
919                 } else if (len > 0) {
920                         printf("%s = ", prop);
921                         print_data (nodep, len);
922                         printf("\n");
923                         return 0;
924                 } else {
925                         printf ("libfdt fdt_getprop(): %s\n",
926                                 fdt_strerror(len));
927                         return 1;
928                 }
929         }
930
931         /*
932          * The user passed in a node path and no property,
933          * print the node and all subnodes.
934          */
935         while(level >= 0) {
936                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
937                 switch(tag) {
938                 case FDT_BEGIN_NODE:
939                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
940                         if (level <= depth) {
941                                 if (pathp == NULL)
942                                         pathp = "/* NULL pointer error */";
943                                 if (*pathp == '\0')
944                                         pathp = "/";    /* root is nameless */
945                                 printf("%s%s {\n",
946                                         &tabs[MAX_LEVEL - level], pathp);
947                         }
948                         level++;
949                         if (level >= MAX_LEVEL) {
950                                 printf("Nested too deep, aborting.\n");
951                                 return 1;
952                         }
953                         break;
954                 case FDT_END_NODE:
955                         level--;
956                         if (level <= depth)
957                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
958                         if (level == 0) {
959                                 level = -1;             /* exit the loop */
960                         }
961                         break;
962                 case FDT_PROP:
963                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
964                                         sizeof(*fdt_prop));
965                         pathp    = fdt_string(working_fdt,
966                                         fdt32_to_cpu(fdt_prop->nameoff));
967                         len      = fdt32_to_cpu(fdt_prop->len);
968                         nodep    = fdt_prop->data;
969                         if (len < 0) {
970                                 printf ("libfdt fdt_getprop(): %s\n",
971                                         fdt_strerror(len));
972                                 return 1;
973                         } else if (len == 0) {
974                                 /* the property has no value */
975                                 if (level <= depth)
976                                         printf("%s%s;\n",
977                                                 &tabs[MAX_LEVEL - level],
978                                                 pathp);
979                         } else {
980                                 if (level <= depth) {
981                                         printf("%s%s = ",
982                                                 &tabs[MAX_LEVEL - level],
983                                                 pathp);
984                                         print_data (nodep, len);
985                                         printf(";\n");
986                                 }
987                         }
988                         break;
989                 case FDT_NOP:
990                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
991                         break;
992                 case FDT_END:
993                         return 1;
994                 default:
995                         if (level <= depth)
996                                 printf("Unknown tag 0x%08X\n", tag);
997                         return 1;
998                 }
999                 nodeoffset = nextoffset;
1000         }
1001         return 0;
1002 }
1003
1004 /********************************************************************/
1005 #ifdef CONFIG_SYS_LONGHELP
1006 static char fdt_help_text[] =
1007         "addr [-c]  <addr> [<length>]   - Set the [control] fdt location to <addr>\n"
1008 #ifdef CONFIG_OF_BOARD_SETUP
1009         "fdt boardsetup                      - Do board-specific set up\n"
1010 #endif
1011         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1012         "fdt resize                          - Resize fdt to size + padding to 4k addr\n"
1013         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1014         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1015         "fdt get value <var> <path> <prop>   - Get <property> and store in <var>\n"
1016         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1017         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1018         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1019         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1020         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1021         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1022         "fdt header                          - Display header info\n"
1023         "fdt bootcpu <id>                    - Set boot cpuid\n"
1024         "fdt memory <addr> <size>            - Add/Update memory node\n"
1025         "fdt rsvmem print                    - Show current mem reserves\n"
1026         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1027         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1028         "fdt chosen [<start> <end>]          - Add/update the /chosen branch in the tree\n"
1029         "                                        <start>/<end> - initrd start/end addr\n"
1030 #if defined(CONFIG_FIT_SIGNATURE)
1031         "fdt checksign [<addr>]              - check FIT signature\n"
1032         "                                        <start> - addr of key blob\n"
1033         "                                                  default gd->fdt_blob\n"
1034 #endif
1035         "NOTE: Dereference aliases by omiting the leading '/', "
1036                 "e.g. fdt print ethernet0.";
1037 #endif
1038
1039 U_BOOT_CMD(
1040         fdt,    255,    0,      do_fdt,
1041         "flattened device tree utility commands", fdt_help_text
1042 );