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') && (argv[1][1] == 'o') &&
408 ft_board_setup(fdt, gd->bd);
410 /* Create a chosen node */
411 else if (argv[1][0] == 'c')
412 fdt_chosen(fdt, 0, 0, 1);
414 /* Unrecognized command */
415 printf ("Usage:\n%s\n", cmdtp->usage);
422 /****************************************************************************/
424 static int fdt_valid(void)
429 printf ("The address of the fdt is invalid (NULL).\n");
433 err = fdt_check_header(fdt);
435 return 1; /* valid */
438 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
440 * Be more informative on bad version.
442 if (err == -FDT_ERR_BADVERSION) {
443 if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION) {
444 printf (" - too old, fdt $d < %d",
446 FDT_FIRST_SUPPORTED_VERSION);
449 if (fdt_last_comp_version(fdt) > FDT_LAST_SUPPORTED_VERSION) {
450 printf (" - too new, fdt $d > %d",
452 FDT_LAST_SUPPORTED_VERSION);
463 /****************************************************************************/
466 * Parse the user's input, partially heuristic. Valid formats:
467 * <0x00112233 4 05> - an array of cells. Numbers follow standard
469 * [00 11 22 .. nn] - byte stream
470 * "string" - If the the value doesn't start with "<" or "[", it is
471 * treated as a string. Note that the quotes are
472 * stripped by the parser before we get the string.
473 * newval: An array of strings containing the new property as specified
474 * on the command line
475 * count: The number of strings in the array
476 * data: A bytestream to be placed in the property
477 * len: The length of the resulting bytestream
479 static int fdt_parse_prop(char **newval, int count, char *data, int *len)
481 char *cp; /* temporary char pointer */
482 char *newp; /* temporary newval char pointer */
483 unsigned long tmp; /* holds converted values */
489 /* An array of cells */
492 while ((*newp != '>') && (stridx < count)) {
494 * Keep searching until we find that last ">"
495 * That way users don't have to escape the spaces
498 newp = newval[++stridx];
503 tmp = simple_strtoul(cp, &newp, 0);
504 *(uint32_t *)data = __cpu_to_be32(tmp);
508 /* If the ptr didn't advance, something went wrong */
509 if ((newp - cp) <= 0) {
510 printf("Sorry, I could not convert \"%s\"\n",
520 printf("Unexpected character '%c'\n", *newp);
523 } else if (*newp == '[') {
525 * Byte stream. Convert the values.
528 while ((*newp != ']') && (stridx < count)) {
529 tmp = simple_strtoul(newp, &newp, 16);
530 *data++ = tmp & 0xFF;
535 newp = newval[++stridx];
538 printf("Unexpected character '%c'\n", *newval);
543 * Assume it is a string. Copy it into our data area for
544 * convenience (including the terminating '\0').
546 while (stridx < count) {
547 *len = strlen(newp) + 1;
549 newp = newval[++stridx];
555 /****************************************************************************/
558 * Heuristic to guess if this is a string or concatenated strings.
561 static int is_printable_string(const void *data, int len)
563 const char *s = data;
565 /* zero length is not */
569 /* must terminate with zero */
570 if (s[len - 1] != '\0')
573 /* printable or a null byte (concatenated strings) */
574 while (((*s == '\0') || isprint(*s)) && (len > 0)) {
576 * If we see a null, there are three possibilities:
577 * 1) If len == 1, it is the end of the string, printable
578 * 2) Next character also a null, not printable.
579 * 3) Next character not a null, continue to check.
591 /* Not the null termination, or not done yet: not printable */
592 if (*s != '\0' || (len != 0))
600 * Print the property in the best format, a heuristic guess. Print as
601 * a string, concatenated strings, a byte, word, double word, or (if all
602 * else fails) it is printed as a stream of bytes.
604 static void print_data(const void *data, int len)
608 /* no data, don't print */
613 * It is a string, but it may have multiple strings (embedded '\0's).
615 if (is_printable_string(data, len)) {
622 j += strlen(data) + 1;
623 data += strlen(data) + 1;
633 for (j = 0, p = data; j < len/4; j ++)
634 printf("0x%x%s", p[j], j < (len/4 - 1) ? " " : "");
636 } else { /* anything else... hexdump */
640 for (j = 0, s = data; j < len; j++)
641 printf("%02x%s", s[j], j < len - 1 ? " " : "");
646 /****************************************************************************/
649 * Recursively print (a portion of) the fdt. The depth parameter
650 * determines how deeply nested the fdt is printed.
652 static int fdt_print(const char *pathp, char *prop, int depth)
654 static char tabs[MAX_LEVEL+1] =
655 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
656 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
657 const void *nodep; /* property node pointer */
658 int nodeoffset; /* node offset from libfdt */
659 int nextoffset; /* next node offset from libfdt */
660 uint32_t tag; /* tag */
661 int len; /* length of the property */
662 int level = 0; /* keep track of nesting level */
663 const struct fdt_property *fdt_prop;
665 nodeoffset = fdt_path_offset (fdt, pathp);
666 if (nodeoffset < 0) {
668 * Not found or something else bad happened.
670 printf ("libfdt fdt_path_offset() returned %s\n",
671 fdt_strerror(nodeoffset));
675 * The user passed in a property as well as node path.
676 * Print only the given property and then return.
679 nodep = fdt_getprop (fdt, nodeoffset, prop, &len);
681 /* no property value */
682 printf("%s %s\n", pathp, prop);
684 } else if (len > 0) {
685 printf("%s = ", prop);
686 print_data (nodep, len);
690 printf ("libfdt fdt_getprop(): %s\n",
697 * The user passed in a node path and no property,
698 * print the node and all subnodes.
701 tag = fdt_next_tag(fdt, nodeoffset, &nextoffset);
704 pathp = fdt_get_name(fdt, nodeoffset, NULL);
705 if (level <= depth) {
707 pathp = "/* NULL pointer error */";
709 pathp = "/"; /* root is nameless */
711 &tabs[MAX_LEVEL - level], pathp);
714 if (level >= MAX_LEVEL) {
715 printf("Nested too deep, aborting.\n");
722 printf("%s};\n", &tabs[MAX_LEVEL - level]);
724 level = -1; /* exit the loop */
728 fdt_prop = fdt_offset_ptr(fdt, nodeoffset,
730 pathp = fdt_string(fdt,
731 fdt32_to_cpu(fdt_prop->nameoff));
732 len = fdt32_to_cpu(fdt_prop->len);
733 nodep = fdt_prop->data;
735 printf ("libfdt fdt_getprop(): %s\n",
738 } else if (len == 0) {
739 /* the property has no value */
742 &tabs[MAX_LEVEL - level],
745 if (level <= depth) {
747 &tabs[MAX_LEVEL - level],
749 print_data (nodep, len);
755 printf("/* NOP */\n", &tabs[MAX_LEVEL - level]);
761 printf("Unknown tag 0x%08X\n", tag);
764 nodeoffset = nextoffset;
769 /********************************************************************/
773 "fdt - flattened device tree utility commands\n",
774 "addr <addr> [<length>] - Set the fdt location to <addr>\n"
775 #ifdef CONFIG_OF_BOARD_SETUP
776 "fdt boardsetup - Do board-specific set up\n"
778 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
779 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
780 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
781 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
782 "fdt mknode <path> <node> - Create a new node after <path>\n"
783 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
784 "fdt header - Display header info\n"
785 "fdt bootcpu <id> - Set boot cpuid\n"
786 "fdt memory <addr> <size> - Add/Update memory node\n"
787 "fdt rsvmem print - Show current mem reserves\n"
788 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
789 "fdt rsvmem delete <index> - Delete a mem reserves\n"
790 "fdt chosen - Add/update the /chosen branch in the tree\n"
791 "NOTE: If the path or property you are setting/printing has a '#' character\n"
792 " or spaces, you MUST escape it with a \\ character or quote it with \".\n"