2 * (C) Copyright 2000-2010
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Guennadi Liakhovetski, DENX Software Engineering, lg@denx.de.
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,
28 #include <env_flags.h>
30 #include <linux/stringify.h>
35 #include <sys/types.h>
36 #include <sys/ioctl.h>
42 # include <linux/mtd/mtd.h>
44 # define __user /* nothing */
45 # include <mtd/mtd-user.h>
50 #define WHITESPACE(c) ((c == '\t') || (c == ' '))
52 #define min(x, y) ({ \
53 typeof(x) _min1 = (x); \
54 typeof(y) _min2 = (y); \
55 (void) (&_min1 == &_min2); \
56 _min1 < _min2 ? _min1 : _min2; })
59 char devname[16]; /* Device name */
60 ulong devoff; /* Device offset */
61 ulong env_size; /* environment size */
62 ulong erase_size; /* device erase size */
63 ulong env_sectors; /* number of environment sectors */
64 uint8_t mtd_type; /* type of the MTD device */
67 static struct envdev_s envdevices[2] =
70 .mtd_type = MTD_ABSENT,
72 .mtd_type = MTD_ABSENT,
75 static int dev_current;
77 #define DEVNAME(i) envdevices[(i)].devname
78 #define DEVOFFSET(i) envdevices[(i)].devoff
79 #define ENVSIZE(i) envdevices[(i)].env_size
80 #define DEVESIZE(i) envdevices[(i)].erase_size
81 #define ENVSECTORS(i) envdevices[(i)].env_sectors
82 #define DEVTYPE(i) envdevices[(i)].mtd_type
84 #define CUR_ENVSIZE ENVSIZE(dev_current)
86 #define ENV_SIZE getenvsize()
88 struct env_image_single {
89 uint32_t crc; /* CRC32 over data bytes */
93 struct env_image_redundant {
94 uint32_t crc; /* CRC32 over data bytes */
95 unsigned char flags; /* active or obsolete */
108 unsigned char *flags;
110 enum flag_scheme flag_scheme;
113 static struct environment environment = {
114 .flag_scheme = FLAG_NONE,
117 static int HaveRedundEnv = 0;
119 static unsigned char active_flag = 1;
120 /* obsolete_flag must be 0 to efficiently set it on NOR flash without erasing */
121 static unsigned char obsolete_flag = 0;
123 #define DEFAULT_ENV_INSTANCE_STATIC
124 #include <env_default.h>
126 static int flash_io (int mode);
127 static char *envmatch (char * s1, char * s2);
128 static int parse_config (void);
130 #if defined(CONFIG_FILE)
131 static int get_config (char *);
133 static inline ulong getenvsize (void)
135 ulong rc = CUR_ENVSIZE - sizeof(long);
142 static char *fw_string_blank(char *s, int noblank)
147 for (i = 0; i < len; i++, s++) {
148 if ((noblank && !WHITESPACE(*s)) ||
149 (!noblank && WHITESPACE(*s)))
159 * Search the environment for a variable.
160 * Return the value, if found, or NULL, if not found.
162 char *fw_getenv (char *name)
166 for (env = environment.data; *env; env = nxt + 1) {
169 for (nxt = env; *nxt; ++nxt) {
170 if (nxt >= &environment.data[ENV_SIZE]) {
171 fprintf (stderr, "## Error: "
172 "environment not terminated\n");
176 val = envmatch (name, env);
185 * Search the default environment for a variable.
186 * Return the value, if found, or NULL, if not found.
188 char *fw_getdefenv(char *name)
192 for (env = default_environment; *env; env = nxt + 1) {
195 for (nxt = env; *nxt; ++nxt) {
196 if (nxt >= &default_environment[ENV_SIZE]) {
197 fprintf(stderr, "## Error: "
198 "default environment not terminated\n");
202 val = envmatch(name, env);
211 * Print the current definition of one, or more, or all
212 * environment variables
214 int fw_printenv (int argc, char *argv[])
223 if (argc == 1) { /* Print all env variables */
224 for (env = environment.data; *env; env = nxt + 1) {
225 for (nxt = env; *nxt; ++nxt) {
226 if (nxt >= &environment.data[ENV_SIZE]) {
227 fprintf (stderr, "## Error: "
228 "environment not terminated\n");
233 printf ("%s\n", env);
238 if (strcmp (argv[1], "-n") == 0) {
243 fprintf (stderr, "## Error: "
244 "`-n' option requires exactly one argument\n");
251 for (i = 1; i < argc; ++i) { /* print single env variables */
252 char *name = argv[i];
255 for (env = environment.data; *env; env = nxt + 1) {
257 for (nxt = env; *nxt; ++nxt) {
258 if (nxt >= &environment.data[ENV_SIZE]) {
259 fprintf (stderr, "## Error: "
260 "environment not terminated\n");
264 val = envmatch (name, env);
267 fputs (name, stdout);
275 fprintf (stderr, "## Error: \"%s\" not defined\n", name);
283 int fw_env_close(void)
288 *environment.crc = crc32(0, (uint8_t *) environment.data, ENV_SIZE);
290 /* write environment back to flash */
291 if (flash_io(O_RDWR)) {
293 "Error: can't write fw_env to flash\n");
302 * Set/Clear a single variable in the environment.
303 * This is called in sequence to update the environment
304 * in RAM without updating the copy in flash after each set
306 int fw_env_write(char *name, char *value)
311 int deleting, creating, overwriting;
314 * search if variable with this name already exists
316 for (nxt = env = environment.data; *env; env = nxt + 1) {
317 for (nxt = env; *nxt; ++nxt) {
318 if (nxt >= &environment.data[ENV_SIZE]) {
319 fprintf(stderr, "## Error: "
320 "environment not terminated\n");
325 if ((oldval = envmatch (name, env)) != NULL)
329 deleting = (oldval && !(value && strlen(value)));
330 creating = (!oldval && (value && strlen(value)));
331 overwriting = (oldval && (value && strlen(value)));
333 /* check for permission */
335 if (env_flags_validate_varaccess(name,
336 ENV_FLAGS_VARACCESS_PREVENT_DELETE)) {
337 printf("Can't delete \"%s\"\n", name);
341 } else if (overwriting) {
342 if (env_flags_validate_varaccess(name,
343 ENV_FLAGS_VARACCESS_PREVENT_OVERWR)) {
344 printf("Can't overwrite \"%s\"\n", name);
347 } else if (env_flags_validate_varaccess(name,
348 ENV_FLAGS_VARACCESS_PREVENT_NONDEF_OVERWR)) {
349 const char *defval = fw_getdefenv(name);
353 if (strcmp(oldval, defval)
355 printf("Can't overwrite \"%s\"\n", name);
360 } else if (creating) {
361 if (env_flags_validate_varaccess(name,
362 ENV_FLAGS_VARACCESS_PREVENT_CREATE)) {
363 printf("Can't create \"%s\"\n", name);
371 if (deleting || overwriting) {
372 if (*++nxt == '\0') {
377 if ((*env == '\0') && (*nxt == '\0'))
386 if (!value || !strlen(value))
390 * Append new definition at the end
392 for (env = environment.data; *env || *(env + 1); ++env);
393 if (env > environment.data)
397 * "name" + "=" + "val" +"\0\0" > CUR_ENVSIZE - (env-environment)
399 len = strlen (name) + 2;
400 /* add '=' for first arg, ' ' for all others */
401 len += strlen(value) + 1;
403 if (len > (&environment.data[ENV_SIZE] - env)) {
405 "Error: environment overflow, \"%s\" deleted\n",
410 while ((*env = *name++) != '\0')
413 while ((*++env = *value++) != '\0')
416 /* end is marked with double '\0' */
423 * Deletes or sets environment variables. Returns -1 and sets errno error codes:
425 * EINVAL - need at least 1 argument
426 * EROFS - certain variables ("ethaddr", "serial#") cannot be
427 * modified or deleted
430 int fw_setenv(int argc, char *argv[])
443 fprintf(stderr, "Error: environment not initialized\n");
449 if (env_flags_validate_env_set_params(argc, argv) < 0)
453 for (i = 2; i < argc; ++i) {
455 size_t val_len = strlen(val);
458 value[len - 1] = ' ';
459 value = realloc(value, len + val_len + 1);
462 "Cannot malloc %zu bytes: %s\n",
463 len, strerror(errno));
467 memcpy(value + len, val, val_len);
472 fw_env_write(name, value);
476 return fw_env_close();
480 * Parse a file and configure the u-boot variables.
481 * The script file has a very simple format, as follows:
483 * Each line has a couple with name, value:
484 * <white spaces>variable_name<white spaces>variable_value
486 * Both variable_name and variable_value are interpreted as strings.
487 * Any character after <white spaces> and before ending \r\n is interpreted
488 * as variable's value (no comment allowed on these lines !)
490 * Comments are allowed if the first character in the line is #
492 * Returns -1 and sets errno error codes:
496 int fw_parse_script(char *fname)
499 char dump[1024]; /* Maximum line length in the file */
507 fprintf(stderr, "Error: environment not initialized\n");
511 if (strcmp(fname, "-") == 0)
514 fp = fopen(fname, "r");
516 fprintf(stderr, "I cannot open %s for reading\n",
522 while (fgets(dump, sizeof(dump), fp)) {
527 * Read a whole line from the file. If the line is too long
528 * or is not terminated, reports an error and exit.
530 if (dump[len - 1] != '\n') {
532 "Line %d not corrected terminated or too long\n",
538 /* Drop ending line feed / carriage return */
539 while (len > 0 && (dump[len - 1] == '\n' ||
540 dump[len - 1] == '\r')) {
541 dump[len - 1] = '\0';
545 /* Skip comment or empty lines */
546 if ((len == 0) || dump[0] == '#')
550 * Search for variable's name,
551 * remove leading whitespaces
553 name = fw_string_blank(dump, 1);
557 /* The first white space is the end of variable name */
558 val = fw_string_blank(name, 0);
562 if ((val - name) < len)
563 val = fw_string_blank(val, 1);
569 fprintf(stderr, "Setting %s : %s\n",
570 name, val ? val : " removed");
573 if (env_flags_validate_type(name, val) < 0) {
579 * If there is an error setting a variable,
580 * try to save the environment and returns an error
582 if (fw_env_write(name, val)) {
584 "fw_env_write returns with error : %s\n",
592 /* Close file if not stdin */
593 if (strcmp(fname, "-") != 0)
596 ret |= fw_env_close();
603 * Test for bad block on NAND, just returns 0 on NOR, on NAND:
606 * < 0 - failed to test
608 static int flash_bad_block (int fd, uint8_t mtd_type, loff_t *blockstart)
610 if (mtd_type == MTD_NANDFLASH) {
611 int badblock = ioctl (fd, MEMGETBADBLOCK, blockstart);
614 perror ("Cannot read bad block mark");
620 fprintf (stderr, "Bad block at 0x%llx, "
621 "skipping\n", *blockstart);
631 * Read data from flash at an offset into a provided buffer. On NAND it skips
632 * bad blocks but makes sure it stays within ENVSECTORS (dev) starting from
633 * the DEVOFFSET (dev) block. On NOR the loop is only run once.
635 static int flash_read_buf (int dev, int fd, void *buf, size_t count,
636 off_t offset, uint8_t mtd_type)
638 size_t blocklen; /* erase / write length - one block on NAND,
640 size_t processed = 0; /* progress counter */
641 size_t readlen = count; /* current read length */
642 off_t top_of_range; /* end of the last block we may use */
643 off_t block_seek; /* offset inside the current block to the start
645 loff_t blockstart; /* running start of the current block -
646 MEMGETBADBLOCK needs 64 bits */
649 blockstart = (offset / DEVESIZE (dev)) * DEVESIZE (dev);
651 /* Offset inside a block */
652 block_seek = offset - blockstart;
654 if (mtd_type == MTD_NANDFLASH) {
656 * NAND: calculate which blocks we are reading. We have
657 * to read one block at a time to skip bad blocks.
659 blocklen = DEVESIZE (dev);
662 * To calculate the top of the range, we have to use the
663 * global DEVOFFSET (dev), which can be different from offset
665 top_of_range = ((DEVOFFSET(dev) / blocklen) +
666 ENVSECTORS (dev)) * blocklen;
668 /* Limit to one block for the first read */
669 if (readlen > blocklen - block_seek)
670 readlen = blocklen - block_seek;
673 top_of_range = offset + count;
676 /* This only runs once on NOR flash */
677 while (processed < count) {
678 rc = flash_bad_block (fd, mtd_type, &blockstart);
679 if (rc < 0) /* block test failed */
682 if (blockstart + block_seek + readlen > top_of_range) {
683 /* End of range is reached */
685 "Too few good blocks within range\n");
689 if (rc) { /* block is bad */
690 blockstart += blocklen;
695 * If a block is bad, we retry in the next block at the same
696 * offset - see common/env_nand.c::writeenv()
698 lseek (fd, blockstart + block_seek, SEEK_SET);
700 rc = read (fd, buf + processed, readlen);
702 fprintf (stderr, "Read error on %s: %s\n",
703 DEVNAME (dev), strerror (errno));
707 fprintf(stderr, "Read 0x%x bytes at 0x%llx on %s\n",
708 rc, blockstart + block_seek, DEVNAME(dev));
710 processed += readlen;
711 readlen = min (blocklen, count - processed);
713 blockstart += blocklen;
720 * Write count bytes at offset, but stay within ENVSECTORS (dev) sectors of
721 * DEVOFFSET (dev). Similar to the read case above, on NOR and dataflash we
722 * erase and write the whole data at once.
724 static int flash_write_buf (int dev, int fd, void *buf, size_t count,
725 off_t offset, uint8_t mtd_type)
728 struct erase_info_user erase;
729 size_t blocklen; /* length of NAND block / NOR erase sector */
730 size_t erase_len; /* whole area that can be erased - may include
732 size_t erasesize; /* erase / write length - one block on NAND,
734 size_t processed = 0; /* progress counter */
735 size_t write_total; /* total size to actually write - excluding
737 off_t erase_offset; /* offset to the first erase block (aligned)
739 off_t block_seek; /* offset inside the erase block to the start
741 off_t top_of_range; /* end of the last block we may use */
742 loff_t blockstart; /* running start of the current block -
743 MEMGETBADBLOCK needs 64 bits */
746 blocklen = DEVESIZE (dev);
748 top_of_range = ((DEVOFFSET(dev) / blocklen) +
749 ENVSECTORS (dev)) * blocklen;
751 erase_offset = (offset / blocklen) * blocklen;
753 /* Maximum area we may use */
754 erase_len = top_of_range - erase_offset;
756 blockstart = erase_offset;
757 /* Offset inside a block */
758 block_seek = offset - erase_offset;
761 * Data size we actually have to write: from the start of the block
762 * to the start of the data, then count bytes of data, and to the
765 write_total = ((block_seek + count + blocklen - 1) /
766 blocklen) * blocklen;
769 * Support data anywhere within erase sectors: read out the complete
770 * area to be erased, replace the environment image, write the whole
773 if (write_total > count) {
774 data = malloc (erase_len);
777 "Cannot malloc %zu bytes: %s\n",
778 erase_len, strerror (errno));
782 rc = flash_read_buf (dev, fd, data, write_total, erase_offset,
784 if (write_total != rc)
788 fprintf(stderr, "Preserving data ");
790 fprintf(stderr, "0x%x - 0x%lx", 0, block_seek - 1);
791 if (block_seek + count != write_total) {
793 fprintf(stderr, " and ");
794 fprintf(stderr, "0x%lx - 0x%x",
795 block_seek + count, write_total - 1);
797 fprintf(stderr, "\n");
799 /* Overwrite the old environment */
800 memcpy (data + block_seek, buf, count);
803 * We get here, iff offset is block-aligned and count is a
804 * multiple of blocklen - see write_total calculation above
809 if (mtd_type == MTD_NANDFLASH) {
811 * NAND: calculate which blocks we are writing. We have
812 * to write one block at a time to skip bad blocks.
814 erasesize = blocklen;
816 erasesize = erase_len;
819 erase.length = erasesize;
821 /* This only runs once on NOR flash and SPI-dataflash */
822 while (processed < write_total) {
823 rc = flash_bad_block (fd, mtd_type, &blockstart);
824 if (rc < 0) /* block test failed */
827 if (blockstart + erasesize > top_of_range) {
828 fprintf (stderr, "End of range reached, aborting\n");
832 if (rc) { /* block is bad */
833 blockstart += blocklen;
837 erase.start = blockstart;
838 ioctl (fd, MEMUNLOCK, &erase);
839 /* These do not need an explicit erase cycle */
840 if (mtd_type != MTD_ABSENT &&
841 mtd_type != MTD_DATAFLASH)
842 if (ioctl (fd, MEMERASE, &erase) != 0) {
843 fprintf (stderr, "MTD erase error on %s: %s\n",
849 if (lseek (fd, blockstart, SEEK_SET) == -1) {
851 "Seek error on %s: %s\n",
852 DEVNAME (dev), strerror (errno));
857 fprintf(stderr, "Write 0x%x bytes at 0x%llx\n", erasesize,
860 if (write (fd, data + processed, erasesize) != erasesize) {
861 fprintf (stderr, "Write error on %s: %s\n",
862 DEVNAME (dev), strerror (errno));
866 ioctl (fd, MEMLOCK, &erase);
868 processed += blocklen;
870 blockstart += blocklen;
873 if (write_total > count)
880 * Set obsolete flag at offset - NOR flash only
882 static int flash_flag_obsolete (int dev, int fd, off_t offset)
885 struct erase_info_user erase;
887 erase.start = DEVOFFSET (dev);
888 erase.length = DEVESIZE (dev);
889 /* This relies on the fact, that obsolete_flag == 0 */
890 rc = lseek (fd, offset, SEEK_SET);
892 fprintf (stderr, "Cannot seek to set the flag on %s \n",
896 ioctl (fd, MEMUNLOCK, &erase);
897 rc = write (fd, &obsolete_flag, sizeof (obsolete_flag));
898 ioctl (fd, MEMLOCK, &erase);
900 perror ("Could not set obsolete flag");
905 static int flash_write (int fd_current, int fd_target, int dev_target)
909 switch (environment.flag_scheme) {
912 case FLAG_INCREMENTAL:
913 (*environment.flags)++;
916 *environment.flags = active_flag;
919 fprintf (stderr, "Unimplemented flash scheme %u \n",
920 environment.flag_scheme);
925 fprintf(stderr, "Writing new environment at 0x%lx on %s\n",
926 DEVOFFSET (dev_target), DEVNAME (dev_target));
928 rc = flash_write_buf(dev_target, fd_target, environment.image,
929 CUR_ENVSIZE, DEVOFFSET(dev_target),
930 DEVTYPE(dev_target));
934 if (environment.flag_scheme == FLAG_BOOLEAN) {
935 /* Have to set obsolete flag */
936 off_t offset = DEVOFFSET (dev_current) +
937 offsetof (struct env_image_redundant, flags);
940 "Setting obsolete flag in environment at 0x%lx on %s\n",
941 DEVOFFSET (dev_current), DEVNAME (dev_current));
943 flash_flag_obsolete (dev_current, fd_current, offset);
949 static int flash_read (int fd)
951 struct mtd_info_user mtdinfo;
957 fprintf(stderr, "Cannot stat the file %s\n",
958 DEVNAME(dev_current));
962 if (S_ISCHR(st.st_mode)) {
963 rc = ioctl(fd, MEMGETINFO, &mtdinfo);
965 fprintf(stderr, "Cannot get MTD information for %s\n",
966 DEVNAME(dev_current));
969 if (mtdinfo.type != MTD_NORFLASH &&
970 mtdinfo.type != MTD_NANDFLASH &&
971 mtdinfo.type != MTD_DATAFLASH &&
972 mtdinfo.type != MTD_UBIVOLUME) {
973 fprintf (stderr, "Unsupported flash type %u on %s\n",
974 mtdinfo.type, DEVNAME(dev_current));
978 memset(&mtdinfo, 0, sizeof(mtdinfo));
979 mtdinfo.type = MTD_ABSENT;
982 DEVTYPE(dev_current) = mtdinfo.type;
984 rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE,
985 DEVOFFSET (dev_current), mtdinfo.type);
987 return (rc != CUR_ENVSIZE) ? -1 : 0;
990 static int flash_io (int mode)
992 int fd_current, fd_target, rc, dev_target;
994 /* dev_current: fd_current, erase_current */
995 fd_current = open (DEVNAME (dev_current), mode);
996 if (fd_current < 0) {
998 "Can't open %s: %s\n",
999 DEVNAME (dev_current), strerror (errno));
1003 if (mode == O_RDWR) {
1004 if (HaveRedundEnv) {
1005 /* switch to next partition for writing */
1006 dev_target = !dev_current;
1007 /* dev_target: fd_target, erase_target */
1008 fd_target = open (DEVNAME (dev_target), mode);
1009 if (fd_target < 0) {
1011 "Can't open %s: %s\n",
1012 DEVNAME (dev_target),
1018 dev_target = dev_current;
1019 fd_target = fd_current;
1022 rc = flash_write (fd_current, fd_target, dev_target);
1024 if (HaveRedundEnv) {
1025 if (close (fd_target)) {
1027 "I/O error on %s: %s\n",
1028 DEVNAME (dev_target),
1034 rc = flash_read (fd_current);
1038 if (close (fd_current)) {
1040 "I/O error on %s: %s\n",
1041 DEVNAME (dev_current), strerror (errno));
1049 * s1 is either a simple 'name', or a 'name=value' pair.
1050 * s2 is a 'name=value' pair.
1051 * If the names match, return the value of s2, else NULL.
1054 static char *envmatch (char * s1, char * s2)
1056 if (s1 == NULL || s2 == NULL)
1059 while (*s1 == *s2++)
1062 if (*s1 == '\0' && *(s2 - 1) == '=')
1068 * Prevent confusion if running from erased flash memory
1070 int fw_env_open(void)
1073 unsigned char flag0;
1077 unsigned char flag1;
1080 struct env_image_single *single;
1081 struct env_image_redundant *redundant;
1083 if (parse_config ()) /* should fill envdevices */
1086 addr0 = calloc(1, CUR_ENVSIZE);
1087 if (addr0 == NULL) {
1089 "Not enough memory for environment (%ld bytes)\n",
1094 /* read environment from FLASH to local buffer */
1095 environment.image = addr0;
1097 if (HaveRedundEnv) {
1099 environment.crc = &redundant->crc;
1100 environment.flags = &redundant->flags;
1101 environment.data = redundant->data;
1104 environment.crc = &single->crc;
1105 environment.flags = NULL;
1106 environment.data = single->data;
1110 if (flash_io (O_RDONLY))
1113 crc0 = crc32 (0, (uint8_t *) environment.data, ENV_SIZE);
1114 crc0_ok = (crc0 == *environment.crc);
1115 if (!HaveRedundEnv) {
1118 "Warning: Bad CRC, using default environment\n");
1119 memcpy(environment.data, default_environment, sizeof default_environment);
1122 flag0 = *environment.flags;
1125 addr1 = calloc(1, CUR_ENVSIZE);
1126 if (addr1 == NULL) {
1128 "Not enough memory for environment (%ld bytes)\n",
1135 * have to set environment.image for flash_read(), careful -
1136 * other pointers in environment still point inside addr0
1138 environment.image = addr1;
1139 if (flash_io (O_RDONLY))
1142 /* Check flag scheme compatibility */
1143 if (DEVTYPE(dev_current) == MTD_NORFLASH &&
1144 DEVTYPE(!dev_current) == MTD_NORFLASH) {
1145 environment.flag_scheme = FLAG_BOOLEAN;
1146 } else if (DEVTYPE(dev_current) == MTD_NANDFLASH &&
1147 DEVTYPE(!dev_current) == MTD_NANDFLASH) {
1148 environment.flag_scheme = FLAG_INCREMENTAL;
1149 } else if (DEVTYPE(dev_current) == MTD_DATAFLASH &&
1150 DEVTYPE(!dev_current) == MTD_DATAFLASH) {
1151 environment.flag_scheme = FLAG_BOOLEAN;
1152 } else if (DEVTYPE(dev_current) == MTD_UBIVOLUME &&
1153 DEVTYPE(!dev_current) == MTD_UBIVOLUME) {
1154 environment.flag_scheme = FLAG_INCREMENTAL;
1156 fprintf (stderr, "Incompatible flash types!\n");
1160 crc1 = crc32 (0, (uint8_t *) redundant->data, ENV_SIZE);
1161 crc1_ok = (crc1 == redundant->crc);
1162 flag1 = redundant->flags;
1164 if (crc0_ok && !crc1_ok) {
1166 } else if (!crc0_ok && crc1_ok) {
1168 } else if (!crc0_ok && !crc1_ok) {
1170 "Warning: Bad CRC, using default environment\n");
1171 memcpy (environment.data, default_environment,
1172 sizeof default_environment);
1175 switch (environment.flag_scheme) {
1177 if (flag0 == active_flag &&
1178 flag1 == obsolete_flag) {
1180 } else if (flag0 == obsolete_flag &&
1181 flag1 == active_flag) {
1183 } else if (flag0 == flag1) {
1185 } else if (flag0 == 0xFF) {
1187 } else if (flag1 == 0xFF) {
1193 case FLAG_INCREMENTAL:
1194 if (flag0 == 255 && flag1 == 0)
1196 else if ((flag1 == 255 && flag0 == 0) ||
1199 else /* flag1 > flag0 */
1203 fprintf (stderr, "Unknown flag scheme %u \n",
1204 environment.flag_scheme);
1210 * If we are reading, we don't need the flag and the CRC any
1211 * more, if we are writing, we will re-calculate CRC and update
1212 * flags before writing out
1215 environment.image = addr1;
1216 environment.crc = &redundant->crc;
1217 environment.flags = &redundant->flags;
1218 environment.data = redundant->data;
1221 environment.image = addr0;
1222 /* Other pointers are already set */
1226 fprintf(stderr, "Selected env in %s\n", DEVNAME(dev_current));
1233 static int parse_config ()
1237 #if defined(CONFIG_FILE)
1238 /* Fills in DEVNAME(), ENVSIZE(), DEVESIZE(). Or don't. */
1239 if (get_config (CONFIG_FILE)) {
1241 "Cannot parse config file: %s\n", strerror (errno));
1245 strcpy (DEVNAME (0), DEVICE1_NAME);
1246 DEVOFFSET (0) = DEVICE1_OFFSET;
1247 ENVSIZE (0) = ENV1_SIZE;
1248 /* Default values are: erase-size=env-size, #sectors=1 */
1249 DEVESIZE (0) = ENVSIZE (0);
1251 #ifdef DEVICE1_ESIZE
1252 DEVESIZE (0) = DEVICE1_ESIZE;
1254 #ifdef DEVICE1_ENVSECTORS
1255 ENVSECTORS (0) = DEVICE1_ENVSECTORS;
1259 strcpy (DEVNAME (1), DEVICE2_NAME);
1260 DEVOFFSET (1) = DEVICE2_OFFSET;
1261 ENVSIZE (1) = ENV2_SIZE;
1262 /* Default values are: erase-size=env-size, #sectors=1 */
1263 DEVESIZE (1) = ENVSIZE (1);
1265 #ifdef DEVICE2_ESIZE
1266 DEVESIZE (1) = DEVICE2_ESIZE;
1268 #ifdef DEVICE2_ENVSECTORS
1269 ENVSECTORS (1) = DEVICE2_ENVSECTORS;
1274 if (stat (DEVNAME (0), &st)) {
1276 "Cannot access MTD device %s: %s\n",
1277 DEVNAME (0), strerror (errno));
1281 if (HaveRedundEnv && stat (DEVNAME (1), &st)) {
1283 "Cannot access MTD device %s: %s\n",
1284 DEVNAME (1), strerror (errno));
1290 #if defined(CONFIG_FILE)
1291 static int get_config (char *fname)
1298 fp = fopen (fname, "r");
1302 while (i < 2 && fgets (dump, sizeof (dump), fp)) {
1303 /* Skip incomplete conversions and comment strings */
1307 rc = sscanf (dump, "%s %lx %lx %lx %lx",
1318 /* Assume the erase size is the same as the env-size */
1319 DEVESIZE(i) = ENVSIZE(i);
1322 /* Default - 1 sector */
1329 HaveRedundEnv = i - 1;
1330 if (!i) { /* No valid entries found */