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