Merge tag 'xilinx-for-v2019.01' of git://git.denx.de/u-boot-microblaze
[platform/kernel/u-boot.git] / cmd / fdt.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2007
4  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5  * Based on code written by:
6  *   Pantelis Antoniou <pantelis.antoniou@gmail.com> and
7  *   Matthew McClintock <msm@freescale.com>
8  */
9
10 #include <common.h>
11 #include <command.h>
12 #include <linux/ctype.h>
13 #include <linux/types.h>
14 #include <asm/global_data.h>
15 #include <linux/libfdt.h>
16 #include <fdt_support.h>
17 #include <mapmem.h>
18 #include <asm/io.h>
19
20 #define MAX_LEVEL       32              /* how deeply nested we will go */
21 #define SCRATCHPAD      1024            /* bytes of scratchpad memory */
22 #define CMD_FDT_MAX_DUMP 64
23
24 /*
25  * Global data (for the gd->bd)
26  */
27 DECLARE_GLOBAL_DATA_PTR;
28
29 static int fdt_valid(struct fdt_header **blobp);
30 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
31 static int fdt_print(const char *pathp, char *prop, int depth);
32 static int is_printable_string(const void *data, int len);
33
34 /*
35  * The working_fdt points to our working flattened device tree.
36  */
37 struct fdt_header *working_fdt;
38
39 void set_working_fdt_addr(ulong addr)
40 {
41         void *buf;
42
43         buf = map_sysmem(addr, 0);
44         working_fdt = buf;
45         env_set_hex("fdtaddr", addr);
46 }
47
48 /*
49  * Get a value from the fdt and format it to be set in the environment
50  */
51 static int fdt_value_env_set(const void *nodep, int len, const char *var)
52 {
53         if (is_printable_string(nodep, len))
54                 env_set(var, (void *)nodep);
55         else if (len == 4) {
56                 char buf[11];
57
58                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
59                 env_set(var, buf);
60         } else if (len%4 == 0 && len <= 20) {
61                 /* Needed to print things like sha1 hashes. */
62                 char buf[41];
63                 int i;
64
65                 for (i = 0; i < len; i += sizeof(unsigned int))
66                         sprintf(buf + (i * 2), "%08x",
67                                 *(unsigned int *)(nodep + i));
68                 env_set(var, buf);
69         } else {
70                 printf("error: unprintable value\n");
71                 return 1;
72         }
73         return 0;
74 }
75
76 static const char * const fdt_member_table[] = {
77         "magic",
78         "totalsize",
79         "off_dt_struct",
80         "off_dt_strings",
81         "off_mem_rsvmap",
82         "version",
83         "last_comp_version",
84         "boot_cpuid_phys",
85         "size_dt_strings",
86         "size_dt_struct",
87 };
88
89 static int fdt_get_header_value(int argc, char * const argv[])
90 {
91         fdt32_t *fdtp = (fdt32_t *)working_fdt;
92         ulong val;
93         int i;
94
95         if (argv[2][0] != 'g')
96                 return CMD_RET_FAILURE;
97
98         for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
99                 if (strcmp(fdt_member_table[i], argv[4]))
100                         continue;
101
102                 val = fdt32_to_cpu(fdtp[i]);
103                 env_set_hex(argv[3], val);
104                 return CMD_RET_SUCCESS;
105         }
106
107         return CMD_RET_FAILURE;
108 }
109
110 /*
111  * Flattened Device Tree command, see the help for parameter definitions.
112  */
113 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
114 {
115         if (argc < 2)
116                 return CMD_RET_USAGE;
117
118         /*
119          * Set the address of the fdt
120          */
121         if (strncmp(argv[1], "ad", 2) == 0) {
122                 unsigned long addr;
123                 int control = 0;
124                 struct fdt_header *blob;
125                 /*
126                  * Set the address [and length] of the fdt.
127                  */
128                 argc -= 2;
129                 argv += 2;
130 /* Temporary #ifdef - some archs don't have fdt_blob yet */
131 #ifdef CONFIG_OF_CONTROL
132                 if (argc && !strcmp(*argv, "-c")) {
133                         control = 1;
134                         argc--;
135                         argv++;
136                 }
137 #endif
138                 if (argc == 0) {
139                         if (control)
140                                 blob = (struct fdt_header *)gd->fdt_blob;
141                         else
142                                 blob = working_fdt;
143                         if (!blob || !fdt_valid(&blob))
144                                 return 1;
145                         printf("The address of the fdt is %#08lx\n",
146                                control ? (ulong)map_to_sysmem(blob) :
147                                         env_get_hex("fdtaddr", 0));
148                         return 0;
149                 }
150
151                 addr = simple_strtoul(argv[0], NULL, 16);
152                 blob = map_sysmem(addr, 0);
153                 if (!fdt_valid(&blob))
154                         return 1;
155                 if (control)
156                         gd->fdt_blob = blob;
157                 else
158                         set_working_fdt_addr(addr);
159
160                 if (argc >= 2) {
161                         int  len;
162                         int  err;
163                         /*
164                          * Optional new length
165                          */
166                         len = simple_strtoul(argv[1], NULL, 16);
167                         if (len < fdt_totalsize(blob)) {
168                                 printf ("New length %d < existing length %d, "
169                                         "ignoring.\n",
170                                         len, fdt_totalsize(blob));
171                         } else {
172                                 /*
173                                  * Open in place with a new length.
174                                  */
175                                 err = fdt_open_into(blob, blob, len);
176                                 if (err != 0) {
177                                         printf ("libfdt fdt_open_into(): %s\n",
178                                                 fdt_strerror(err));
179                                 }
180                         }
181                 }
182
183                 return CMD_RET_SUCCESS;
184         }
185
186         if (!working_fdt) {
187                 puts(
188                         "No FDT memory address configured. Please configure\n"
189                         "the FDT address via \"fdt addr <address>\" command.\n"
190                         "Aborting!\n");
191                 return CMD_RET_FAILURE;
192         }
193
194         /*
195          * Move the working_fdt
196          */
197         if (strncmp(argv[1], "mo", 2) == 0) {
198                 struct fdt_header *newaddr;
199                 int  len;
200                 int  err;
201
202                 if (argc < 4)
203                         return CMD_RET_USAGE;
204
205                 /*
206                  * Set the address and length of the fdt.
207                  */
208                 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
209                 if (!fdt_valid(&working_fdt))
210                         return 1;
211
212                 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
213
214                 /*
215                  * If the user specifies a length, use that.  Otherwise use the
216                  * current length.
217                  */
218                 if (argc <= 4) {
219                         len = fdt_totalsize(working_fdt);
220                 } else {
221                         len = simple_strtoul(argv[4], NULL, 16);
222                         if (len < fdt_totalsize(working_fdt)) {
223                                 printf ("New length 0x%X < existing length "
224                                         "0x%X, aborting.\n",
225                                         len, fdt_totalsize(working_fdt));
226                                 return 1;
227                         }
228                 }
229
230                 /*
231                  * Copy to the new location.
232                  */
233                 err = fdt_open_into(working_fdt, newaddr, len);
234                 if (err != 0) {
235                         printf ("libfdt fdt_open_into(): %s\n",
236                                 fdt_strerror(err));
237                         return 1;
238                 }
239                 set_working_fdt_addr((ulong)newaddr);
240 #ifdef CONFIG_OF_SYSTEM_SETUP
241         /* Call the board-specific fixup routine */
242         } else if (strncmp(argv[1], "sys", 3) == 0) {
243                 int err = ft_system_setup(working_fdt, gd->bd);
244
245                 if (err) {
246                         printf("Failed to add system information to FDT: %s\n",
247                                fdt_strerror(err));
248                         return CMD_RET_FAILURE;
249                 }
250 #endif
251         /*
252          * Make a new node
253          */
254         } else if (strncmp(argv[1], "mk", 2) == 0) {
255                 char *pathp;            /* path */
256                 char *nodep;            /* new node to add */
257                 int  nodeoffset;        /* node offset from libfdt */
258                 int  err;
259
260                 /*
261                  * Parameters: Node path, new node to be appended to the path.
262                  */
263                 if (argc < 4)
264                         return CMD_RET_USAGE;
265
266                 pathp = argv[2];
267                 nodep = argv[3];
268
269                 nodeoffset = fdt_path_offset (working_fdt, pathp);
270                 if (nodeoffset < 0) {
271                         /*
272                          * Not found or something else bad happened.
273                          */
274                         printf ("libfdt fdt_path_offset() returned %s\n",
275                                 fdt_strerror(nodeoffset));
276                         return 1;
277                 }
278                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
279                 if (err < 0) {
280                         printf ("libfdt fdt_add_subnode(): %s\n",
281                                 fdt_strerror(err));
282                         return 1;
283                 }
284
285         /*
286          * Set the value of a property in the working_fdt.
287          */
288         } else if (argv[1][0] == 's') {
289                 char *pathp;            /* path */
290                 char *prop;             /* property */
291                 int  nodeoffset;        /* node offset from libfdt */
292                 static char data[SCRATCHPAD] __aligned(4);/* property storage */
293                 const void *ptmp;
294                 int  len;               /* new length of the property */
295                 int  ret;               /* return value */
296
297                 /*
298                  * Parameters: Node path, property, optional value.
299                  */
300                 if (argc < 4)
301                         return CMD_RET_USAGE;
302
303                 pathp  = argv[2];
304                 prop   = argv[3];
305
306                 nodeoffset = fdt_path_offset (working_fdt, pathp);
307                 if (nodeoffset < 0) {
308                         /*
309                          * Not found or something else bad happened.
310                          */
311                         printf ("libfdt fdt_path_offset() returned %s\n",
312                                 fdt_strerror(nodeoffset));
313                         return 1;
314                 }
315
316                 if (argc == 4) {
317                         len = 0;
318                 } else {
319                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
320                         if (len > SCRATCHPAD) {
321                                 printf("prop (%d) doesn't fit in scratchpad!\n",
322                                        len);
323                                 return 1;
324                         }
325                         if (ptmp != NULL)
326                                 memcpy(data, ptmp, len);
327
328                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
329                         if (ret != 0)
330                                 return ret;
331                 }
332
333                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
334                 if (ret < 0) {
335                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
336                         return 1;
337                 }
338
339         /********************************************************************
340          * Get the value of a property in the working_fdt.
341          ********************************************************************/
342         } else if (argv[1][0] == 'g') {
343                 char *subcmd;           /* sub-command */
344                 char *pathp;            /* path */
345                 char *prop;             /* property */
346                 char *var;              /* variable to store result */
347                 int  nodeoffset;        /* node offset from libfdt */
348                 const void *nodep;      /* property node pointer */
349                 int  len = 0;           /* new length of the property */
350
351                 /*
352                  * Parameters: Node path, property, optional value.
353                  */
354                 if (argc < 5)
355                         return CMD_RET_USAGE;
356
357                 subcmd = argv[2];
358
359                 if (argc < 6 && subcmd[0] != 's')
360                         return CMD_RET_USAGE;
361
362                 var    = argv[3];
363                 pathp  = argv[4];
364                 prop   = argv[5];
365
366                 nodeoffset = fdt_path_offset(working_fdt, pathp);
367                 if (nodeoffset < 0) {
368                         /*
369                          * Not found or something else bad happened.
370                          */
371                         printf("libfdt fdt_path_offset() returned %s\n",
372                                 fdt_strerror(nodeoffset));
373                         return 1;
374                 }
375
376                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
377                         int reqIndex = -1;
378                         int startDepth = fdt_node_depth(
379                                 working_fdt, nodeoffset);
380                         int curDepth = startDepth;
381                         int curIndex = -1;
382                         int nextNodeOffset = fdt_next_node(
383                                 working_fdt, nodeoffset, &curDepth);
384
385                         if (subcmd[0] == 'n')
386                                 reqIndex = simple_strtoul(argv[5], NULL, 16);
387
388                         while (curDepth > startDepth) {
389                                 if (curDepth == startDepth + 1)
390                                         curIndex++;
391                                 if (subcmd[0] == 'n' && curIndex == reqIndex) {
392                                         const char *node_name;
393
394                                         node_name = fdt_get_name(working_fdt,
395                                                                  nextNodeOffset,
396                                                                  NULL);
397                                         env_set(var, node_name);
398                                         return 0;
399                                 }
400                                 nextNodeOffset = fdt_next_node(
401                                         working_fdt, nextNodeOffset, &curDepth);
402                                 if (nextNodeOffset < 0)
403                                         break;
404                         }
405                         if (subcmd[0] == 's') {
406                                 /* get the num nodes at this level */
407                                 env_set_ulong(var, curIndex + 1);
408                         } else {
409                                 /* node index not found */
410                                 printf("libfdt node not found\n");
411                                 return 1;
412                         }
413                 } else {
414                         nodep = fdt_getprop(
415                                 working_fdt, nodeoffset, prop, &len);
416                         if (len == 0) {
417                                 /* no property value */
418                                 env_set(var, "");
419                                 return 0;
420                         } else if (nodep && len > 0) {
421                                 if (subcmd[0] == 'v') {
422                                         int ret;
423
424                                         ret = fdt_value_env_set(nodep, len,
425                                                                 var);
426                                         if (ret != 0)
427                                                 return ret;
428                                 } else if (subcmd[0] == 'a') {
429                                         /* Get address */
430                                         char buf[11];
431
432                                         sprintf(buf, "0x%p", nodep);
433                                         env_set(var, buf);
434                                 } else if (subcmd[0] == 's') {
435                                         /* Get size */
436                                         char buf[11];
437
438                                         sprintf(buf, "0x%08X", len);
439                                         env_set(var, buf);
440                                 } else
441                                         return CMD_RET_USAGE;
442                                 return 0;
443                         } else {
444                                 printf("libfdt fdt_getprop(): %s\n",
445                                         fdt_strerror(len));
446                                 return 1;
447                         }
448                 }
449
450         /*
451          * Print (recursive) / List (single level)
452          */
453         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
454                 int depth = MAX_LEVEL;  /* how deep to print */
455                 char *pathp;            /* path */
456                 char *prop;             /* property */
457                 int  ret;               /* return value */
458                 static char root[2] = "/";
459
460                 /*
461                  * list is an alias for print, but limited to 1 level
462                  */
463                 if (argv[1][0] == 'l') {
464                         depth = 1;
465                 }
466
467                 /*
468                  * Get the starting path.  The root node is an oddball,
469                  * the offset is zero and has no name.
470                  */
471                 if (argc == 2)
472                         pathp = root;
473                 else
474                         pathp = argv[2];
475                 if (argc > 3)
476                         prop = argv[3];
477                 else
478                         prop = NULL;
479
480                 ret = fdt_print(pathp, prop, depth);
481                 if (ret != 0)
482                         return ret;
483
484         /*
485          * Remove a property/node
486          */
487         } else if (strncmp(argv[1], "rm", 2) == 0) {
488                 int  nodeoffset;        /* node offset from libfdt */
489                 int  err;
490
491                 /*
492                  * Get the path.  The root node is an oddball, the offset
493                  * is zero and has no name.
494                  */
495                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
496                 if (nodeoffset < 0) {
497                         /*
498                          * Not found or something else bad happened.
499                          */
500                         printf ("libfdt fdt_path_offset() returned %s\n",
501                                 fdt_strerror(nodeoffset));
502                         return 1;
503                 }
504                 /*
505                  * Do the delete.  A fourth parameter means delete a property,
506                  * otherwise delete the node.
507                  */
508                 if (argc > 3) {
509                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
510                         if (err < 0) {
511                                 printf("libfdt fdt_delprop():  %s\n",
512                                         fdt_strerror(err));
513                                 return err;
514                         }
515                 } else {
516                         err = fdt_del_node(working_fdt, nodeoffset);
517                         if (err < 0) {
518                                 printf("libfdt fdt_del_node():  %s\n",
519                                         fdt_strerror(err));
520                                 return err;
521                         }
522                 }
523
524         /*
525          * Display header info
526          */
527         } else if (argv[1][0] == 'h') {
528                 if (argc == 5)
529                         return fdt_get_header_value(argc, argv);
530
531                 u32 version = fdt_version(working_fdt);
532                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
533                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
534                        fdt_totalsize(working_fdt));
535                 printf("off_dt_struct:\t\t0x%x\n",
536                        fdt_off_dt_struct(working_fdt));
537                 printf("off_dt_strings:\t\t0x%x\n",
538                        fdt_off_dt_strings(working_fdt));
539                 printf("off_mem_rsvmap:\t\t0x%x\n",
540                        fdt_off_mem_rsvmap(working_fdt));
541                 printf("version:\t\t%d\n", version);
542                 printf("last_comp_version:\t%d\n",
543                        fdt_last_comp_version(working_fdt));
544                 if (version >= 2)
545                         printf("boot_cpuid_phys:\t0x%x\n",
546                                 fdt_boot_cpuid_phys(working_fdt));
547                 if (version >= 3)
548                         printf("size_dt_strings:\t0x%x\n",
549                                 fdt_size_dt_strings(working_fdt));
550                 if (version >= 17)
551                         printf("size_dt_struct:\t\t0x%x\n",
552                                 fdt_size_dt_struct(working_fdt));
553                 printf("number mem_rsv:\t\t0x%x\n",
554                        fdt_num_mem_rsv(working_fdt));
555                 printf("\n");
556
557         /*
558          * Set boot cpu id
559          */
560         } else if (strncmp(argv[1], "boo", 3) == 0) {
561                 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
562                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
563
564         /*
565          * memory command
566          */
567         } else if (strncmp(argv[1], "me", 2) == 0) {
568                 uint64_t addr, size;
569                 int err;
570                 addr = simple_strtoull(argv[2], NULL, 16);
571                 size = simple_strtoull(argv[3], NULL, 16);
572                 err = fdt_fixup_memory(working_fdt, addr, size);
573                 if (err < 0)
574                         return err;
575
576         /*
577          * mem reserve commands
578          */
579         } else if (strncmp(argv[1], "rs", 2) == 0) {
580                 if (argv[2][0] == 'p') {
581                         uint64_t addr, size;
582                         int total = fdt_num_mem_rsv(working_fdt);
583                         int j, err;
584                         printf("index\t\t   start\t\t    size\n");
585                         printf("-------------------------------"
586                                 "-----------------\n");
587                         for (j = 0; j < total; j++) {
588                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
589                                 if (err < 0) {
590                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
591                                                         fdt_strerror(err));
592                                         return err;
593                                 }
594                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
595                                         (u32)(addr >> 32),
596                                         (u32)(addr & 0xffffffff),
597                                         (u32)(size >> 32),
598                                         (u32)(size & 0xffffffff));
599                         }
600                 } else if (argv[2][0] == 'a') {
601                         uint64_t addr, size;
602                         int err;
603                         addr = simple_strtoull(argv[3], NULL, 16);
604                         size = simple_strtoull(argv[4], NULL, 16);
605                         err = fdt_add_mem_rsv(working_fdt, addr, size);
606
607                         if (err < 0) {
608                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
609                                         fdt_strerror(err));
610                                 return err;
611                         }
612                 } else if (argv[2][0] == 'd') {
613                         unsigned long idx = simple_strtoul(argv[3], NULL, 16);
614                         int err = fdt_del_mem_rsv(working_fdt, idx);
615
616                         if (err < 0) {
617                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
618                                         fdt_strerror(err));
619                                 return err;
620                         }
621                 } else {
622                         /* Unrecognized command */
623                         return CMD_RET_USAGE;
624                 }
625         }
626 #ifdef CONFIG_OF_BOARD_SETUP
627         /* Call the board-specific fixup routine */
628         else if (strncmp(argv[1], "boa", 3) == 0) {
629                 int err = ft_board_setup(working_fdt, gd->bd);
630
631                 if (err) {
632                         printf("Failed to update board information in FDT: %s\n",
633                                fdt_strerror(err));
634                         return CMD_RET_FAILURE;
635                 }
636 #ifdef CONFIG_SOC_KEYSTONE
637                 ft_board_setup_ex(working_fdt, gd->bd);
638 #endif
639         }
640 #endif
641         /* Create a chosen node */
642         else if (strncmp(argv[1], "cho", 3) == 0) {
643                 unsigned long initrd_start = 0, initrd_end = 0;
644
645                 if ((argc != 2) && (argc != 4))
646                         return CMD_RET_USAGE;
647
648                 if (argc == 4) {
649                         initrd_start = simple_strtoul(argv[2], NULL, 16);
650                         initrd_end = simple_strtoul(argv[3], NULL, 16);
651                 }
652
653                 fdt_chosen(working_fdt);
654                 fdt_initrd(working_fdt, initrd_start, initrd_end);
655
656 #if defined(CONFIG_FIT_SIGNATURE)
657         } else if (strncmp(argv[1], "che", 3) == 0) {
658                 int cfg_noffset;
659                 int ret;
660                 unsigned long addr;
661                 struct fdt_header *blob;
662
663                 if (!working_fdt)
664                         return CMD_RET_FAILURE;
665
666                 if (argc > 2) {
667                         addr = simple_strtoul(argv[2], NULL, 16);
668                         blob = map_sysmem(addr, 0);
669                 } else {
670                         blob = (struct fdt_header *)gd->fdt_blob;
671                 }
672                 if (!fdt_valid(&blob))
673                         return 1;
674
675                 gd->fdt_blob = blob;
676                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
677                 if (!cfg_noffset) {
678                         printf("Could not find configuration node: %s\n",
679                                fdt_strerror(cfg_noffset));
680                         return CMD_RET_FAILURE;
681                 }
682
683                 ret = fit_config_verify(working_fdt, cfg_noffset);
684                 if (ret == 0)
685                         return CMD_RET_SUCCESS;
686                 else
687                         return CMD_RET_FAILURE;
688 #endif
689
690         }
691 #ifdef CONFIG_OF_LIBFDT_OVERLAY
692         /* apply an overlay */
693         else if (strncmp(argv[1], "ap", 2) == 0) {
694                 unsigned long addr;
695                 struct fdt_header *blob;
696                 int ret;
697
698                 if (argc != 3)
699                         return CMD_RET_USAGE;
700
701                 if (!working_fdt)
702                         return CMD_RET_FAILURE;
703
704                 addr = simple_strtoul(argv[2], NULL, 16);
705                 blob = map_sysmem(addr, 0);
706                 if (!fdt_valid(&blob))
707                         return CMD_RET_FAILURE;
708
709                 /* apply method prints messages on error */
710                 ret = fdt_overlay_apply_verbose(working_fdt, blob);
711                 if (ret)
712                         return CMD_RET_FAILURE;
713         }
714 #endif
715         /* resize the fdt */
716         else if (strncmp(argv[1], "re", 2) == 0) {
717                 uint extrasize;
718                 if (argc > 2)
719                         extrasize = simple_strtoul(argv[2], NULL, 16);
720                 else
721                         extrasize = 0;
722                 fdt_shrink_to_minimum(working_fdt, extrasize);
723         }
724         else {
725                 /* Unrecognized command */
726                 return CMD_RET_USAGE;
727         }
728
729         return 0;
730 }
731
732 /****************************************************************************/
733
734 /**
735  * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
736  *
737  * @blobp: Pointer to FDT pointer
738  * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
739  */
740 static int fdt_valid(struct fdt_header **blobp)
741 {
742         const void *blob = *blobp;
743         int err;
744
745         if (blob == NULL) {
746                 printf ("The address of the fdt is invalid (NULL).\n");
747                 return 0;
748         }
749
750         err = fdt_check_header(blob);
751         if (err == 0)
752                 return 1;       /* valid */
753
754         if (err < 0) {
755                 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
756                 /*
757                  * Be more informative on bad version.
758                  */
759                 if (err == -FDT_ERR_BADVERSION) {
760                         if (fdt_version(blob) <
761                             FDT_FIRST_SUPPORTED_VERSION) {
762                                 printf (" - too old, fdt %d < %d",
763                                         fdt_version(blob),
764                                         FDT_FIRST_SUPPORTED_VERSION);
765                         }
766                         if (fdt_last_comp_version(blob) >
767                             FDT_LAST_SUPPORTED_VERSION) {
768                                 printf (" - too new, fdt %d > %d",
769                                         fdt_version(blob),
770                                         FDT_LAST_SUPPORTED_VERSION);
771                         }
772                 }
773                 printf("\n");
774                 *blobp = NULL;
775                 return 0;
776         }
777         return 1;
778 }
779
780 /****************************************************************************/
781
782 /*
783  * Parse the user's input, partially heuristic.  Valid formats:
784  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
785  *                      C conventions.
786  * [00 11 22 .. nn] - byte stream
787  * "string"     - If the the value doesn't start with "<" or "[", it is
788  *                      treated as a string.  Note that the quotes are
789  *                      stripped by the parser before we get the string.
790  * newval: An array of strings containing the new property as specified
791  *      on the command line
792  * count: The number of strings in the array
793  * data: A bytestream to be placed in the property
794  * len: The length of the resulting bytestream
795  */
796 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
797 {
798         char *cp;               /* temporary char pointer */
799         char *newp;             /* temporary newval char pointer */
800         unsigned long tmp;      /* holds converted values */
801         int stridx = 0;
802
803         *len = 0;
804         newp = newval[0];
805
806         /* An array of cells */
807         if (*newp == '<') {
808                 newp++;
809                 while ((*newp != '>') && (stridx < count)) {
810                         /*
811                          * Keep searching until we find that last ">"
812                          * That way users don't have to escape the spaces
813                          */
814                         if (*newp == '\0') {
815                                 newp = newval[++stridx];
816                                 continue;
817                         }
818
819                         cp = newp;
820                         tmp = simple_strtoul(cp, &newp, 0);
821                         if (*cp != '?')
822                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
823                         else
824                                 newp++;
825
826                         data  += 4;
827                         *len += 4;
828
829                         /* If the ptr didn't advance, something went wrong */
830                         if ((newp - cp) <= 0) {
831                                 printf("Sorry, I could not convert \"%s\"\n",
832                                         cp);
833                                 return 1;
834                         }
835
836                         while (*newp == ' ')
837                                 newp++;
838                 }
839
840                 if (*newp != '>') {
841                         printf("Unexpected character '%c'\n", *newp);
842                         return 1;
843                 }
844         } else if (*newp == '[') {
845                 /*
846                  * Byte stream.  Convert the values.
847                  */
848                 newp++;
849                 while ((stridx < count) && (*newp != ']')) {
850                         while (*newp == ' ')
851                                 newp++;
852                         if (*newp == '\0') {
853                                 newp = newval[++stridx];
854                                 continue;
855                         }
856                         if (!isxdigit(*newp))
857                                 break;
858                         tmp = simple_strtoul(newp, &newp, 16);
859                         *data++ = tmp & 0xFF;
860                         *len    = *len + 1;
861                 }
862                 if (*newp != ']') {
863                         printf("Unexpected character '%c'\n", *newp);
864                         return 1;
865                 }
866         } else {
867                 /*
868                  * Assume it is one or more strings.  Copy it into our
869                  * data area for convenience (including the
870                  * terminating '\0's).
871                  */
872                 while (stridx < count) {
873                         size_t length = strlen(newp) + 1;
874                         strcpy(data, newp);
875                         data += length;
876                         *len += length;
877                         newp = newval[++stridx];
878                 }
879         }
880         return 0;
881 }
882
883 /****************************************************************************/
884
885 /*
886  * Heuristic to guess if this is a string or concatenated strings.
887  */
888
889 static int is_printable_string(const void *data, int len)
890 {
891         const char *s = data;
892
893         /* zero length is not */
894         if (len == 0)
895                 return 0;
896
897         /* must terminate with zero or '\n' */
898         if (s[len - 1] != '\0' && s[len - 1] != '\n')
899                 return 0;
900
901         /* printable or a null byte (concatenated strings) */
902         while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
903                 /*
904                  * If we see a null, there are three possibilities:
905                  * 1) If len == 1, it is the end of the string, printable
906                  * 2) Next character also a null, not printable.
907                  * 3) Next character not a null, continue to check.
908                  */
909                 if (s[0] == '\0') {
910                         if (len == 1)
911                                 return 1;
912                         if (s[1] == '\0')
913                                 return 0;
914                 }
915                 s++;
916                 len--;
917         }
918
919         /* Not the null termination, or not done yet: not printable */
920         if (*s != '\0' || (len != 0))
921                 return 0;
922
923         return 1;
924 }
925
926
927 /*
928  * Print the property in the best format, a heuristic guess.  Print as
929  * a string, concatenated strings, a byte, word, double word, or (if all
930  * else fails) it is printed as a stream of bytes.
931  */
932 static void print_data(const void *data, int len)
933 {
934         int j;
935
936         /* no data, don't print */
937         if (len == 0)
938                 return;
939
940         /*
941          * It is a string, but it may have multiple strings (embedded '\0's).
942          */
943         if (is_printable_string(data, len)) {
944                 puts("\"");
945                 j = 0;
946                 while (j < len) {
947                         if (j > 0)
948                                 puts("\", \"");
949                         puts(data);
950                         j    += strlen(data) + 1;
951                         data += strlen(data) + 1;
952                 }
953                 puts("\"");
954                 return;
955         }
956
957         if ((len %4) == 0) {
958                 if (len > CMD_FDT_MAX_DUMP)
959                         printf("* 0x%p [0x%08x]", data, len);
960                 else {
961                         const __be32 *p;
962
963                         printf("<");
964                         for (j = 0, p = data; j < len/4; j++)
965                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
966                                         j < (len/4 - 1) ? " " : "");
967                         printf(">");
968                 }
969         } else { /* anything else... hexdump */
970                 if (len > CMD_FDT_MAX_DUMP)
971                         printf("* 0x%p [0x%08x]", data, len);
972                 else {
973                         const u8 *s;
974
975                         printf("[");
976                         for (j = 0, s = data; j < len; j++)
977                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
978                         printf("]");
979                 }
980         }
981 }
982
983 /****************************************************************************/
984
985 /*
986  * Recursively print (a portion of) the working_fdt.  The depth parameter
987  * determines how deeply nested the fdt is printed.
988  */
989 static int fdt_print(const char *pathp, char *prop, int depth)
990 {
991         static char tabs[MAX_LEVEL+1] =
992                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
993                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
994         const void *nodep;      /* property node pointer */
995         int  nodeoffset;        /* node offset from libfdt */
996         int  nextoffset;        /* next node offset from libfdt */
997         uint32_t tag;           /* tag */
998         int  len;               /* length of the property */
999         int  level = 0;         /* keep track of nesting level */
1000         const struct fdt_property *fdt_prop;
1001
1002         nodeoffset = fdt_path_offset (working_fdt, pathp);
1003         if (nodeoffset < 0) {
1004                 /*
1005                  * Not found or something else bad happened.
1006                  */
1007                 printf ("libfdt fdt_path_offset() returned %s\n",
1008                         fdt_strerror(nodeoffset));
1009                 return 1;
1010         }
1011         /*
1012          * The user passed in a property as well as node path.
1013          * Print only the given property and then return.
1014          */
1015         if (prop) {
1016                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
1017                 if (len == 0) {
1018                         /* no property value */
1019                         printf("%s %s\n", pathp, prop);
1020                         return 0;
1021                 } else if (nodep && len > 0) {
1022                         printf("%s = ", prop);
1023                         print_data (nodep, len);
1024                         printf("\n");
1025                         return 0;
1026                 } else {
1027                         printf ("libfdt fdt_getprop(): %s\n",
1028                                 fdt_strerror(len));
1029                         return 1;
1030                 }
1031         }
1032
1033         /*
1034          * The user passed in a node path and no property,
1035          * print the node and all subnodes.
1036          */
1037         while(level >= 0) {
1038                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1039                 switch(tag) {
1040                 case FDT_BEGIN_NODE:
1041                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1042                         if (level <= depth) {
1043                                 if (pathp == NULL)
1044                                         pathp = "/* NULL pointer error */";
1045                                 if (*pathp == '\0')
1046                                         pathp = "/";    /* root is nameless */
1047                                 printf("%s%s {\n",
1048                                         &tabs[MAX_LEVEL - level], pathp);
1049                         }
1050                         level++;
1051                         if (level >= MAX_LEVEL) {
1052                                 printf("Nested too deep, aborting.\n");
1053                                 return 1;
1054                         }
1055                         break;
1056                 case FDT_END_NODE:
1057                         level--;
1058                         if (level <= depth)
1059                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1060                         if (level == 0) {
1061                                 level = -1;             /* exit the loop */
1062                         }
1063                         break;
1064                 case FDT_PROP:
1065                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1066                                         sizeof(*fdt_prop));
1067                         pathp    = fdt_string(working_fdt,
1068                                         fdt32_to_cpu(fdt_prop->nameoff));
1069                         len      = fdt32_to_cpu(fdt_prop->len);
1070                         nodep    = fdt_prop->data;
1071                         if (len < 0) {
1072                                 printf ("libfdt fdt_getprop(): %s\n",
1073                                         fdt_strerror(len));
1074                                 return 1;
1075                         } else if (len == 0) {
1076                                 /* the property has no value */
1077                                 if (level <= depth)
1078                                         printf("%s%s;\n",
1079                                                 &tabs[MAX_LEVEL - level],
1080                                                 pathp);
1081                         } else {
1082                                 if (level <= depth) {
1083                                         printf("%s%s = ",
1084                                                 &tabs[MAX_LEVEL - level],
1085                                                 pathp);
1086                                         print_data (nodep, len);
1087                                         printf(";\n");
1088                                 }
1089                         }
1090                         break;
1091                 case FDT_NOP:
1092                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1093                         break;
1094                 case FDT_END:
1095                         return 1;
1096                 default:
1097                         if (level <= depth)
1098                                 printf("Unknown tag 0x%08X\n", tag);
1099                         return 1;
1100                 }
1101                 nodeoffset = nextoffset;
1102         }
1103         return 0;
1104 }
1105
1106 /********************************************************************/
1107 #ifdef CONFIG_SYS_LONGHELP
1108 static char fdt_help_text[] =
1109         "addr [-c]  <addr> [<length>]   - Set the [control] fdt location to <addr>\n"
1110 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1111         "fdt apply <addr>                    - Apply overlay to the DT\n"
1112 #endif
1113 #ifdef CONFIG_OF_BOARD_SETUP
1114         "fdt boardsetup                      - Do board-specific set up\n"
1115 #endif
1116 #ifdef CONFIG_OF_SYSTEM_SETUP
1117         "fdt systemsetup                     - Do system-specific set up\n"
1118 #endif
1119         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1120         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1121         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1122         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1123         "fdt get value <var> <path> <prop>   - Get <property> and store in <var>\n"
1124         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1125         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1126         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1127         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1128         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1129         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1130         "fdt header [get <var> <member>]     - Display header info\n"
1131         "                                      get - get header member <member> and store it in <var>\n"
1132         "fdt bootcpu <id>                    - Set boot cpuid\n"
1133         "fdt memory <addr> <size>            - Add/Update memory node\n"
1134         "fdt rsvmem print                    - Show current mem reserves\n"
1135         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1136         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1137         "fdt chosen [<start> <end>]          - Add/update the /chosen branch in the tree\n"
1138         "                                        <start>/<end> - initrd start/end addr\n"
1139 #if defined(CONFIG_FIT_SIGNATURE)
1140         "fdt checksign [<addr>]              - check FIT signature\n"
1141         "                                        <start> - addr of key blob\n"
1142         "                                                  default gd->fdt_blob\n"
1143 #endif
1144         "NOTE: Dereference aliases by omitting the leading '/', "
1145                 "e.g. fdt print ethernet0.";
1146 #endif
1147
1148 U_BOOT_CMD(
1149         fdt,    255,    0,      do_fdt,
1150         "flattened device tree utility commands", fdt_help_text
1151 );