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>
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <linux/ctype.h>
30 #include <linux/types.h>
31 #include <asm/global_data.h>
34 #include <fdt_support.h>
36 #define MAX_LEVEL 32 /* how deeply nested we will go */
37 #define SCRATCHPAD 1024 /* bytes of scratchpad memory */
40 * Global data (for the gd->bd)
42 DECLARE_GLOBAL_DATA_PTR
;
44 static int fdt_valid(void);
45 static int fdt_parse_prop(char *pathp
, char *prop
, char *newval
,
46 char *data
, int *len
);
47 static int fdt_print(const char *pathp
, char *prop
, int depth
);
50 * Flattened Device Tree command, see the help for parameter definitions.
52 int do_fdt (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
55 printf ("Usage:\n%s\n", cmdtp
->usage
);
59 /********************************************************************
60 * Set the address of the fdt
61 ********************************************************************/
62 if (argv
[1][0] == 'a') {
64 * Set the address [and length] of the fdt.
66 fdt
= (struct fdt_header
*)simple_strtoul(argv
[2], NULL
, 16);
78 len
= simple_strtoul(argv
[3], NULL
, 16);
79 if (len
< fdt_totalsize(fdt
)) {
80 printf ("New length %d < existing length %d, "
82 len
, fdt_totalsize(fdt
));
85 * Open in place with a new length.
87 err
= fdt_open_into(fdt
, fdt
, len
);
89 printf ("libfdt fdt_open_into(): %s\n",
95 /********************************************************************
97 ********************************************************************/
98 } else if ((argv
[1][0] == 'm') && (argv
[1][1] == 'o')) {
99 struct fdt_header
*newaddr
;
104 printf ("Usage:\n%s\n", cmdtp
->usage
);
109 * Set the address and length of the fdt.
111 fdt
= (struct fdt_header
*)simple_strtoul(argv
[2], NULL
, 16);
116 newaddr
= (struct fdt_header
*)simple_strtoul(argv
[3],NULL
,16);
119 * If the user specifies a length, use that. Otherwise use the
123 len
= fdt_totalsize(fdt
);
125 len
= simple_strtoul(argv
[4], NULL
, 16);
126 if (len
< fdt_totalsize(fdt
)) {
127 printf ("New length 0x%X < existing length "
129 len
, fdt_totalsize(fdt
));
135 * Copy to the new location.
137 err
= fdt_open_into(fdt
, newaddr
, len
);
139 printf ("libfdt fdt_open_into(): %s\n",
145 /********************************************************************
147 ********************************************************************/
148 } else if ((argv
[1][0] == 'm') && (argv
[1][1] == 'k')) {
149 char *pathp
; /* path */
150 char *nodep
; /* new node to add */
151 int nodeoffset
; /* node offset from libfdt */
155 * Parameters: Node path, new node to be appended to the path.
158 printf ("Usage:\n%s\n", cmdtp
->usage
);
165 nodeoffset
= fdt_path_offset (fdt
, pathp
);
166 if (nodeoffset
< 0) {
168 * Not found or something else bad happened.
170 printf ("libfdt fdt_path_offset() returned %s\n",
171 fdt_strerror(nodeoffset
));
174 err
= fdt_add_subnode(fdt
, nodeoffset
, nodep
);
176 printf ("libfdt fdt_add_subnode(): %s\n",
181 /********************************************************************
182 * Set the value of a property in the fdt.
183 ********************************************************************/
184 } else if (argv
[1][0] == 's') {
185 char *pathp
; /* path */
186 char *prop
; /* property */
187 int nodeoffset
; /* node offset from libfdt */
188 static char data
[SCRATCHPAD
]; /* storage for the property */
189 int len
; /* new length of the property */
190 int ret
; /* return value */
193 * Parameters: Node path, property, optional value.
196 printf ("Usage:\n%s\n", cmdtp
->usage
);
205 ret
= fdt_parse_prop(pathp
, prop
, argv
[4], data
, &len
);
210 nodeoffset
= fdt_path_offset (fdt
, pathp
);
211 if (nodeoffset
< 0) {
213 * Not found or something else bad happened.
215 printf ("libfdt fdt_path_offset() returned %s\n",
216 fdt_strerror(nodeoffset
));
220 ret
= fdt_setprop(fdt
, nodeoffset
, prop
, data
, len
);
222 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret
));
226 /********************************************************************
227 * Print (recursive) / List (single level)
228 ********************************************************************/
229 } else if ((argv
[1][0] == 'p') || (argv
[1][0] == 'l')) {
230 int depth
= MAX_LEVEL
; /* how deep to print */
231 char *pathp
; /* path */
232 char *prop
; /* property */
233 int ret
; /* return value */
234 static char root
[2] = "/";
237 * list is an alias for print, but limited to 1 level
239 if (argv
[1][0] == 'l') {
244 * Get the starting path. The root node is an oddball,
245 * the offset is zero and has no name.
256 ret
= fdt_print(pathp
, prop
, depth
);
260 /********************************************************************
261 * Remove a property/node
262 ********************************************************************/
263 } else if (argv
[1][0] == 'r') {
264 int nodeoffset
; /* node offset from libfdt */
268 * Get the path. The root node is an oddball, the offset
269 * is zero and has no name.
271 nodeoffset
= fdt_path_offset (fdt
, argv
[2]);
272 if (nodeoffset
< 0) {
274 * Not found or something else bad happened.
276 printf ("libfdt fdt_path_offset() returned %s\n",
277 fdt_strerror(nodeoffset
));
281 * Do the delete. A fourth parameter means delete a property,
282 * otherwise delete the node.
285 err
= fdt_delprop(fdt
, nodeoffset
, argv
[3]);
287 printf("libfdt fdt_delprop(): %s\n",
292 err
= fdt_del_node(fdt
, nodeoffset
);
294 printf("libfdt fdt_del_node(): %s\n",
300 #ifdef CONFIG_OF_BOARD_SETUP
301 /* Call the board-specific fixup routine */
302 else if (argv
[1][0] == 'b')
303 ft_board_setup(fdt
, gd
->bd
);
305 /* Create a chosen node */
306 else if (argv
[1][0] == 'c')
307 fdt_chosen(fdt
, 0, 0, 1);
309 #ifdef CONFIG_OF_HAS_UBOOT_ENV
310 /* Create a u-boot-env node */
311 else if (argv
[1][0] == 'e')
314 #ifdef CONFIG_OF_HAS_BD_T
315 /* Create a bd_t node */
316 else if (argv
[1][0] == 'b')
320 /* Unrecognized command */
321 printf ("Usage:\n%s\n", cmdtp
->usage
);
328 /****************************************************************************/
330 static int fdt_valid(void)
335 printf ("The address of the fdt is invalid (NULL).\n");
339 err
= fdt_check_header(fdt
);
341 return 1; /* valid */
344 printf("libfdt fdt_check_header(): %s", fdt_strerror(err
));
346 * Be more informative on bad version.
348 if (err
== -FDT_ERR_BADVERSION
) {
349 if (fdt_version(fdt
) < FDT_FIRST_SUPPORTED_VERSION
) {
350 printf (" - too old, fdt $d < %d",
352 FDT_FIRST_SUPPORTED_VERSION
);
355 if (fdt_last_comp_version(fdt
) > FDT_LAST_SUPPORTED_VERSION
) {
356 printf (" - too new, fdt $d > %d",
358 FDT_LAST_SUPPORTED_VERSION
);
369 /****************************************************************************/
372 * Parse the user's input, partially heuristic. Valid formats:
374 * <0011> - hex half word (16 bits)
375 * <00112233> - hex word (32 bits)
376 * - hex double words (64 bits) are not supported, must use
377 * a byte stream instead.
378 * [00 11 22 .. nn] - byte stream
379 * "string" - If the the value doesn't start with "<" or "[", it is
380 * treated as a string. Note that the quotes are
381 * stripped by the parser before we get the string.
383 static int fdt_parse_prop(char *pathp
, char *prop
, char *newval
,
384 char *data
, int *len
)
386 char *cp
; /* temporary char pointer */
387 unsigned long tmp
; /* holds converted values */
389 if (*newval
== '<') {
391 * Bigger values than bytes.
395 while ((*newval
!= '>') && (*newval
!= '\0')) {
397 tmp
= simple_strtoul(cp
, &newval
, 16);
398 if ((newval
- cp
) <= 2) {
402 } else if ((newval
- cp
) <= 4) {
403 *(uint16_t *)data
= __cpu_to_be16(tmp
);
406 } else if ((newval
- cp
) <= 8) {
407 *(uint32_t *)data
= __cpu_to_be32(tmp
);
411 printf("Sorry, I could not convert \"%s\"\n",
415 while (*newval
== ' ')
418 if (*newval
!= '>') {
419 printf("Unexpected character '%c'\n", *newval
);
422 } else if (*newval
== '[') {
424 * Byte stream. Convert the values.
428 while ((*newval
!= ']') && (*newval
!= '\0')) {
429 tmp
= simple_strtoul(newval
, &newval
, 16);
430 *data
++ = tmp
& 0xFF;
432 while (*newval
== ' ')
435 if (*newval
!= ']') {
436 printf("Unexpected character '%c'\n", *newval
);
441 * Assume it is a string. Copy it into our data area for
442 * convenience (including the terminating '\0').
444 *len
= strlen(newval
) + 1;
445 strcpy(data
, newval
);
450 /****************************************************************************/
453 * Heuristic to guess if this is a string or concatenated strings.
456 static int is_printable_string(const void *data
, int len
)
458 const char *s
= data
;
460 /* zero length is not */
464 /* must terminate with zero */
465 if (s
[len
- 1] != '\0')
468 /* printable or a null byte (concatenated strings) */
469 while (((*s
== '\0') || isprint(*s
)) && (len
> 0)) {
471 * If we see a null, there are three possibilities:
472 * 1) If len == 1, it is the end of the string, printable
473 * 2) Next character also a null, not printable.
474 * 3) Next character not a null, continue to check.
486 /* Not the null termination, or not done yet: not printable */
487 if (*s
!= '\0' || (len
!= 0))
495 * Print the property in the best format, a heuristic guess. Print as
496 * a string, concatenated strings, a byte, word, double word, or (if all
497 * else fails) it is printed as a stream of bytes.
499 static void print_data(const void *data
, int len
)
504 /* no data, don't print */
509 * It is a string, but it may have multiple strings (embedded '\0's).
511 if (is_printable_string(data
, len
)) {
518 j
+= strlen(data
) + 1;
519 data
+= strlen(data
) + 1;
527 printf("<0x%02x>", (*(u8
*) data
) & 0xff);
529 case 2: /* half-word */
530 printf("<0x%04x>", be16_to_cpu(*(u16
*) data
) & 0xffff);
533 printf("<0x%08x>", be32_to_cpu(*(u32
*) data
) & 0xffffffffU
);
535 case 8: /* double-word */
537 printf("<0x%016llx>", be64_to_cpu(*(uint64_t *) data
));
539 printf("<0x%08x ", be32_to_cpu(*(u32
*) data
) & 0xffffffffU
);
541 printf("0x%08x>", be32_to_cpu(*(u32
*) data
) & 0xffffffffU
);
544 default: /* anything else... hexdump */
546 for (j
= 0, s
= data
; j
< len
; j
++)
547 printf("%02x%s", s
[j
], j
< len
- 1 ? " " : "");
554 /****************************************************************************/
557 * Recursively print (a portion of) the fdt. The depth parameter
558 * determines how deeply nested the fdt is printed.
560 static int fdt_print(const char *pathp
, char *prop
, int depth
)
562 static char tabs
[MAX_LEVEL
+1] =
563 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
564 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
565 const void *nodep
; /* property node pointer */
566 int nodeoffset
; /* node offset from libfdt */
567 int nextoffset
; /* next node offset from libfdt */
568 uint32_t tag
; /* tag */
569 int len
; /* length of the property */
570 int level
= 0; /* keep track of nesting level */
571 const struct fdt_property
*fdt_prop
;
573 nodeoffset
= fdt_path_offset (fdt
, pathp
);
574 if (nodeoffset
< 0) {
576 * Not found or something else bad happened.
578 printf ("libfdt fdt_path_offset() returned %s\n",
579 fdt_strerror(nodeoffset
));
583 * The user passed in a property as well as node path.
584 * Print only the given property and then return.
587 nodep
= fdt_getprop (fdt
, nodeoffset
, prop
, &len
);
589 /* no property value */
590 printf("%s %s\n", pathp
, prop
);
592 } else if (len
> 0) {
593 printf("%s = ", prop
);
594 print_data (nodep
, len
);
598 printf ("libfdt fdt_getprop(): %s\n",
605 * The user passed in a node path and no property,
606 * print the node and all subnodes.
609 tag
= fdt_next_tag(fdt
, nodeoffset
, &nextoffset
);
612 pathp
= fdt_get_name(fdt
, nodeoffset
, NULL
);
613 if (level
<= depth
) {
615 pathp
= "/* NULL pointer error */";
617 pathp
= "/"; /* root is nameless */
619 &tabs
[MAX_LEVEL
- level
], pathp
);
622 if (level
>= MAX_LEVEL
) {
623 printf("Nested too deep, aborting.\n");
630 printf("%s};\n", &tabs
[MAX_LEVEL
- level
]);
632 level
= -1; /* exit the loop */
636 fdt_prop
= fdt_offset_ptr(fdt
, nodeoffset
,
638 pathp
= fdt_string(fdt
,
639 fdt32_to_cpu(fdt_prop
->nameoff
));
640 len
= fdt32_to_cpu(fdt_prop
->len
);
641 nodep
= fdt_prop
->data
;
643 printf ("libfdt fdt_getprop(): %s\n",
646 } else if (len
== 0) {
647 /* the property has no value */
650 &tabs
[MAX_LEVEL
- level
],
653 if (level
<= depth
) {
655 &tabs
[MAX_LEVEL
- level
],
657 print_data (nodep
, len
);
663 printf("/* NOP */\n", &tabs
[MAX_LEVEL
- level
]);
669 printf("Unknown tag 0x%08X\n", tag
);
672 nodeoffset
= nextoffset
;
677 /********************************************************************/
681 "fdt - flattened device tree utility commands\n",
682 "addr <addr> [<length>] - Set the fdt location to <addr>\n"
683 #ifdef CONFIG_OF_BOARD_SETUP
684 "fdt boardsetup - Do board-specific set up\n"
686 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
687 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
688 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
689 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
690 "fdt mknode <path> <node> - Create a new node after <path>\n"
691 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
692 "fdt chosen - Add/update the /chosen branch in the tree\n"
693 #ifdef CONFIG_OF_HAS_UBOOT_ENV
694 "fdt env - Add/replace the /u-boot-env branch in the tree\n"
696 #ifdef CONFIG_OF_HAS_BD_T
697 "fdt bd_t - Add/replace the /bd_t branch in the tree\n"
699 "NOTE: If the path or property you are setting/printing has a '#' character\n"
700 " or spaces, you MUST escape it with a \\ character or quote it with \".\n"