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 **newval
, int count
, char *data
, int *len
);
46 static int fdt_print(const char *pathp
, char *prop
, int depth
);
49 * Flattened Device Tree command, see the help for parameter definitions.
51 int do_fdt (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
54 printf ("Usage:\n%s\n", cmdtp
->usage
);
58 /********************************************************************
59 * Set the address of the fdt
60 ********************************************************************/
61 if (argv
[1][0] == 'a') {
63 * Set the address [and length] of the fdt.
65 fdt
= (struct fdt_header
*)simple_strtoul(argv
[2], NULL
, 16);
77 len
= simple_strtoul(argv
[3], NULL
, 16);
78 if (len
< fdt_totalsize(fdt
)) {
79 printf ("New length %d < existing length %d, "
81 len
, fdt_totalsize(fdt
));
84 * Open in place with a new length.
86 err
= fdt_open_into(fdt
, fdt
, len
);
88 printf ("libfdt fdt_open_into(): %s\n",
94 /********************************************************************
96 ********************************************************************/
97 } else if ((argv
[1][0] == 'm') && (argv
[1][1] == 'o')) {
98 struct fdt_header
*newaddr
;
103 printf ("Usage:\n%s\n", cmdtp
->usage
);
108 * Set the address and length of the fdt.
110 fdt
= (struct fdt_header
*)simple_strtoul(argv
[2], NULL
, 16);
115 newaddr
= (struct fdt_header
*)simple_strtoul(argv
[3],NULL
,16);
118 * If the user specifies a length, use that. Otherwise use the
122 len
= fdt_totalsize(fdt
);
124 len
= simple_strtoul(argv
[4], NULL
, 16);
125 if (len
< fdt_totalsize(fdt
)) {
126 printf ("New length 0x%X < existing length "
128 len
, fdt_totalsize(fdt
));
134 * Copy to the new location.
136 err
= fdt_open_into(fdt
, newaddr
, len
);
138 printf ("libfdt fdt_open_into(): %s\n",
144 /********************************************************************
146 ********************************************************************/
147 } else if ((argv
[1][0] == 'm') && (argv
[1][1] == 'k')) {
148 char *pathp
; /* path */
149 char *nodep
; /* new node to add */
150 int nodeoffset
; /* node offset from libfdt */
154 * Parameters: Node path, new node to be appended to the path.
157 printf ("Usage:\n%s\n", cmdtp
->usage
);
164 nodeoffset
= fdt_path_offset (fdt
, pathp
);
165 if (nodeoffset
< 0) {
167 * Not found or something else bad happened.
169 printf ("libfdt fdt_path_offset() returned %s\n",
170 fdt_strerror(nodeoffset
));
173 err
= fdt_add_subnode(fdt
, nodeoffset
, nodep
);
175 printf ("libfdt fdt_add_subnode(): %s\n",
180 /********************************************************************
181 * Set the value of a property in the fdt.
182 ********************************************************************/
183 } else if (argv
[1][0] == 's') {
184 char *pathp
; /* path */
185 char *prop
; /* property */
186 int nodeoffset
; /* node offset from libfdt */
187 static char data
[SCRATCHPAD
]; /* storage for the property */
188 int len
; /* new length of the property */
189 int ret
; /* return value */
192 * Parameters: Node path, property, optional value.
195 printf ("Usage:\n%s\n", cmdtp
->usage
);
204 ret
= fdt_parse_prop(&argv
[4], argc
- 4, data
, &len
);
209 nodeoffset
= fdt_path_offset (fdt
, pathp
);
210 if (nodeoffset
< 0) {
212 * Not found or something else bad happened.
214 printf ("libfdt fdt_path_offset() returned %s\n",
215 fdt_strerror(nodeoffset
));
219 ret
= fdt_setprop(fdt
, nodeoffset
, prop
, data
, len
);
221 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret
));
225 /********************************************************************
226 * Print (recursive) / List (single level)
227 ********************************************************************/
228 } else if ((argv
[1][0] == 'p') || (argv
[1][0] == 'l')) {
229 int depth
= MAX_LEVEL
; /* how deep to print */
230 char *pathp
; /* path */
231 char *prop
; /* property */
232 int ret
; /* return value */
233 static char root
[2] = "/";
236 * list is an alias for print, but limited to 1 level
238 if (argv
[1][0] == 'l') {
243 * Get the starting path. The root node is an oddball,
244 * the offset is zero and has no name.
255 ret
= fdt_print(pathp
, prop
, depth
);
259 /********************************************************************
260 * Remove a property/node
261 ********************************************************************/
262 } else if ((argv
[1][0] == 'r') && (argv
[1][1] == 'm')) {
263 int nodeoffset
; /* node offset from libfdt */
267 * Get the path. The root node is an oddball, the offset
268 * is zero and has no name.
270 nodeoffset
= fdt_path_offset (fdt
, argv
[2]);
271 if (nodeoffset
< 0) {
273 * Not found or something else bad happened.
275 printf ("libfdt fdt_path_offset() returned %s\n",
276 fdt_strerror(nodeoffset
));
280 * Do the delete. A fourth parameter means delete a property,
281 * otherwise delete the node.
284 err
= fdt_delprop(fdt
, nodeoffset
, argv
[3]);
286 printf("libfdt fdt_delprop(): %s\n",
291 err
= fdt_del_node(fdt
, nodeoffset
);
293 printf("libfdt fdt_del_node(): %s\n",
299 /********************************************************************
300 * Display header info
301 ********************************************************************/
302 } else if (argv
[1][0] == 'h') {
303 u32 version
= fdt_version(fdt
);
304 printf("magic:\t\t\t0x%x\n", fdt_magic(fdt
));
305 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(fdt
), fdt_totalsize(fdt
));
306 printf("off_dt_struct:\t\t0x%x\n", fdt_off_dt_struct(fdt
));
307 printf("off_dt_strings:\t\t0x%x\n", fdt_off_dt_strings(fdt
));
308 printf("off_mem_rsvmap:\t\t0x%x\n", fdt_off_mem_rsvmap(fdt
));
309 printf("version:\t\t%d\n", version
);
310 printf("last_comp_version:\t%d\n", fdt_last_comp_version(fdt
));
312 printf("boot_cpuid_phys:\t0x%x\n",
313 fdt_boot_cpuid_phys(fdt
));
315 printf("size_dt_strings:\t0x%x\n",
316 fdt_size_dt_strings(fdt
));
318 printf("size_dt_struct:\t\t0x%x\n",
319 fdt_size_dt_struct(fdt
));
320 printf("number mem_rsv:\t\t0x%x\n", fdt_num_mem_rsv(fdt
));
323 /********************************************************************
325 ********************************************************************/
326 } else if ((argv
[1][0] == 'b') && (argv
[1][1] == 'o') &&
327 (argv
[1][2] == 'o')) {
328 unsigned long tmp
= simple_strtoul(argv
[2], NULL
, 16);
329 fdt_set_boot_cpuid_phys(fdt
, tmp
);
331 /********************************************************************
333 ********************************************************************/
334 } else if ((argv
[1][0] == 'm') && (argv
[1][1] == 'e')) {
337 #ifdef CFG_64BIT_STRTOUL
338 addr
= simple_strtoull(argv
[2], NULL
, 16);
339 size
= simple_strtoull(argv
[3], NULL
, 16);
341 addr
= simple_strtoul(argv
[2], NULL
, 16);
342 size
= simple_strtoul(argv
[3], NULL
, 16);
344 err
= fdt_fixup_memory(fdt
, addr
, size
);
348 /********************************************************************
349 * mem reserve commands
350 ********************************************************************/
351 } else if ((argv
[1][0] == 'r') && (argv
[1][1] == 's')) {
352 if (argv
[2][0] == 'p') {
354 int total
= fdt_num_mem_rsv(fdt
);
356 printf("index\t\t start\t\t size\n");
357 printf("-------------------------------"
358 "-----------------\n");
359 for (j
= 0; j
< total
; j
++) {
360 err
= fdt_get_mem_rsv(fdt
, j
, &addr
, &size
);
362 printf("libfdt fdt_get_mem_rsv(): %s\n",
366 printf(" %x\t%08x%08x\t%08x%08x\n", j
,
368 (u32
)(addr
& 0xffffffff),
370 (u32
)(size
& 0xffffffff));
372 } else if (argv
[2][0] == 'a') {
375 #ifdef CFG_64BIT_STRTOUL
376 addr
= simple_strtoull(argv
[3], NULL
, 16);
377 size
= simple_strtoull(argv
[4], NULL
, 16);
379 addr
= simple_strtoul(argv
[3], NULL
, 16);
380 size
= simple_strtoul(argv
[4], NULL
, 16);
382 err
= fdt_add_mem_rsv(fdt
, addr
, size
);
385 printf("libfdt fdt_add_mem_rsv(): %s\n",
389 } else if (argv
[2][0] == 'd') {
390 unsigned long idx
= simple_strtoul(argv
[3], NULL
, 16);
391 int err
= fdt_del_mem_rsv(fdt
, idx
);
394 printf("libfdt fdt_del_mem_rsv(): %s\n",
399 /* Unrecognized command */
400 printf ("Usage:\n%s\n", cmdtp
->usage
);
404 #ifdef CONFIG_OF_BOARD_SETUP
405 /* Call the board-specific fixup routine */
406 else if (argv
[1][0] == 'b')
407 ft_board_setup(fdt
, gd
->bd
);
409 /* Create a chosen node */
410 else if (argv
[1][0] == 'c')
411 fdt_chosen(fdt
, 0, 0, 1);
413 /* Unrecognized command */
414 printf ("Usage:\n%s\n", cmdtp
->usage
);
421 /****************************************************************************/
423 static int fdt_valid(void)
428 printf ("The address of the fdt is invalid (NULL).\n");
432 err
= fdt_check_header(fdt
);
434 return 1; /* valid */
437 printf("libfdt fdt_check_header(): %s", fdt_strerror(err
));
439 * Be more informative on bad version.
441 if (err
== -FDT_ERR_BADVERSION
) {
442 if (fdt_version(fdt
) < FDT_FIRST_SUPPORTED_VERSION
) {
443 printf (" - too old, fdt $d < %d",
445 FDT_FIRST_SUPPORTED_VERSION
);
448 if (fdt_last_comp_version(fdt
) > FDT_LAST_SUPPORTED_VERSION
) {
449 printf (" - too new, fdt $d > %d",
451 FDT_LAST_SUPPORTED_VERSION
);
462 /****************************************************************************/
465 * Parse the user's input, partially heuristic. Valid formats:
466 * <0x00112233 4 05> - an array of cells. Numbers follow standard
468 * [00 11 22 .. nn] - byte stream
469 * "string" - If the the value doesn't start with "<" or "[", it is
470 * treated as a string. Note that the quotes are
471 * stripped by the parser before we get the string.
472 * newval: An array of strings containing the new property as specified
473 * on the command line
474 * count: The number of strings in the array
475 * data: A bytestream to be placed in the property
476 * len: The length of the resulting bytestream
478 static int fdt_parse_prop(char **newval
, int count
, char *data
, int *len
)
480 char *cp
; /* temporary char pointer */
481 char *newp
; /* temporary newval char pointer */
482 unsigned long tmp
; /* holds converted values */
488 /* An array of cells */
491 while ((*newp
!= '>') && (stridx
< count
)) {
493 * Keep searching until we find that last ">"
494 * That way users don't have to escape the spaces
497 newp
= newval
[++stridx
];
502 tmp
= simple_strtoul(cp
, &newp
, 0);
503 *(uint32_t *)data
= __cpu_to_be32(tmp
);
507 /* If the ptr didn't advance, something went wrong */
508 if ((newp
- cp
) <= 0) {
509 printf("Sorry, I could not convert \"%s\"\n",
519 printf("Unexpected character '%c'\n", *newp
);
522 } else if (*newp
== '[') {
524 * Byte stream. Convert the values.
527 while ((*newp
!= ']') && (stridx
< count
)) {
528 tmp
= simple_strtoul(newp
, &newp
, 16);
529 *data
++ = tmp
& 0xFF;
534 newp
= newval
[++stridx
];
537 printf("Unexpected character '%c'\n", *newval
);
542 * Assume it is a string. Copy it into our data area for
543 * convenience (including the terminating '\0').
545 while (stridx
< count
) {
546 *len
= strlen(newp
) + 1;
548 newp
= newval
[++stridx
];
554 /****************************************************************************/
557 * Heuristic to guess if this is a string or concatenated strings.
560 static int is_printable_string(const void *data
, int len
)
562 const char *s
= data
;
564 /* zero length is not */
568 /* must terminate with zero */
569 if (s
[len
- 1] != '\0')
572 /* printable or a null byte (concatenated strings) */
573 while (((*s
== '\0') || isprint(*s
)) && (len
> 0)) {
575 * If we see a null, there are three possibilities:
576 * 1) If len == 1, it is the end of the string, printable
577 * 2) Next character also a null, not printable.
578 * 3) Next character not a null, continue to check.
590 /* Not the null termination, or not done yet: not printable */
591 if (*s
!= '\0' || (len
!= 0))
599 * Print the property in the best format, a heuristic guess. Print as
600 * a string, concatenated strings, a byte, word, double word, or (if all
601 * else fails) it is printed as a stream of bytes.
603 static void print_data(const void *data
, int len
)
607 /* no data, don't print */
612 * It is a string, but it may have multiple strings (embedded '\0's).
614 if (is_printable_string(data
, len
)) {
621 j
+= strlen(data
) + 1;
622 data
+= strlen(data
) + 1;
632 for (j
= 0, p
= data
; j
< len
/4; j
++)
633 printf("0x%x%s", p
[j
], j
< (len
/4 - 1) ? " " : "");
635 } else { /* anything else... hexdump */
639 for (j
= 0, s
= data
; j
< len
; j
++)
640 printf("%02x%s", s
[j
], j
< len
- 1 ? " " : "");
645 /****************************************************************************/
648 * Recursively print (a portion of) the fdt. The depth parameter
649 * determines how deeply nested the fdt is printed.
651 static int fdt_print(const char *pathp
, char *prop
, int depth
)
653 static char tabs
[MAX_LEVEL
+1] =
654 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
655 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
656 const void *nodep
; /* property node pointer */
657 int nodeoffset
; /* node offset from libfdt */
658 int nextoffset
; /* next node offset from libfdt */
659 uint32_t tag
; /* tag */
660 int len
; /* length of the property */
661 int level
= 0; /* keep track of nesting level */
662 const struct fdt_property
*fdt_prop
;
664 nodeoffset
= fdt_path_offset (fdt
, pathp
);
665 if (nodeoffset
< 0) {
667 * Not found or something else bad happened.
669 printf ("libfdt fdt_path_offset() returned %s\n",
670 fdt_strerror(nodeoffset
));
674 * The user passed in a property as well as node path.
675 * Print only the given property and then return.
678 nodep
= fdt_getprop (fdt
, nodeoffset
, prop
, &len
);
680 /* no property value */
681 printf("%s %s\n", pathp
, prop
);
683 } else if (len
> 0) {
684 printf("%s = ", prop
);
685 print_data (nodep
, len
);
689 printf ("libfdt fdt_getprop(): %s\n",
696 * The user passed in a node path and no property,
697 * print the node and all subnodes.
700 tag
= fdt_next_tag(fdt
, nodeoffset
, &nextoffset
);
703 pathp
= fdt_get_name(fdt
, nodeoffset
, NULL
);
704 if (level
<= depth
) {
706 pathp
= "/* NULL pointer error */";
708 pathp
= "/"; /* root is nameless */
710 &tabs
[MAX_LEVEL
- level
], pathp
);
713 if (level
>= MAX_LEVEL
) {
714 printf("Nested too deep, aborting.\n");
721 printf("%s};\n", &tabs
[MAX_LEVEL
- level
]);
723 level
= -1; /* exit the loop */
727 fdt_prop
= fdt_offset_ptr(fdt
, nodeoffset
,
729 pathp
= fdt_string(fdt
,
730 fdt32_to_cpu(fdt_prop
->nameoff
));
731 len
= fdt32_to_cpu(fdt_prop
->len
);
732 nodep
= fdt_prop
->data
;
734 printf ("libfdt fdt_getprop(): %s\n",
737 } else if (len
== 0) {
738 /* the property has no value */
741 &tabs
[MAX_LEVEL
- level
],
744 if (level
<= depth
) {
746 &tabs
[MAX_LEVEL
- level
],
748 print_data (nodep
, len
);
754 printf("/* NOP */\n", &tabs
[MAX_LEVEL
- level
]);
760 printf("Unknown tag 0x%08X\n", tag
);
763 nodeoffset
= nextoffset
;
768 /********************************************************************/
772 "fdt - flattened device tree utility commands\n",
773 "addr <addr> [<length>] - Set the fdt location to <addr>\n"
774 #ifdef CONFIG_OF_BOARD_SETUP
775 "fdt boardsetup - Do board-specific set up\n"
777 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
778 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
779 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
780 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
781 "fdt mknode <path> <node> - Create a new node after <path>\n"
782 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
783 "fdt header - Display header info\n"
784 "fdt bootcpu <id> - Set boot cpuid\n"
785 "fdt memory <addr> <size> - Add/Update memory node\n"
786 "fdt rsvmem print - Show current mem reserves\n"
787 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
788 "fdt rsvmem delete <index> - Delete a mem reserves\n"
789 "fdt chosen - Add/update the /chosen branch in the tree\n"
790 "NOTE: If the path or property you are setting/printing has a '#' character\n"
791 " or spaces, you MUST escape it with a \\ character or quote it with \".\n"