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,
33 #include <sys/types.h>
34 #include <sys/ioctl.h>
40 # include <linux/mtd/mtd.h>
42 # define __user /* nothing */
43 # include <mtd/mtd-user.h>
48 #define WHITESPACE(c) ((c == '\t') || (c == ' '))
50 #define min(x, y) ({ \
51 typeof(x) _min1 = (x); \
52 typeof(y) _min2 = (y); \
53 (void) (&_min1 == &_min2); \
54 _min1 < _min2 ? _min1 : _min2; })
57 char devname[16]; /* Device name */
58 ulong devoff; /* Device offset */
59 ulong env_size; /* environment size */
60 ulong erase_size; /* device erase size */
61 ulong env_sectors; /* number of environment sectors */
62 uint8_t mtd_type; /* type of the MTD device */
65 static struct envdev_s envdevices[2] =
68 .mtd_type = MTD_ABSENT,
70 .mtd_type = MTD_ABSENT,
73 static int dev_current;
75 #define DEVNAME(i) envdevices[(i)].devname
76 #define DEVOFFSET(i) envdevices[(i)].devoff
77 #define ENVSIZE(i) envdevices[(i)].env_size
78 #define DEVESIZE(i) envdevices[(i)].erase_size
79 #define ENVSECTORS(i) envdevices[(i)].env_sectors
80 #define DEVTYPE(i) envdevices[(i)].mtd_type
82 #define CUR_ENVSIZE ENVSIZE(dev_current)
84 #define ENV_SIZE getenvsize()
86 struct env_image_single {
87 uint32_t crc; /* CRC32 over data bytes */
91 struct env_image_redundant {
92 uint32_t crc; /* CRC32 over data bytes */
93 unsigned char flags; /* active or obsolete */
106 unsigned char *flags;
108 enum flag_scheme flag_scheme;
111 static struct environment environment = {
112 .flag_scheme = FLAG_NONE,
115 static int HaveRedundEnv = 0;
117 static unsigned char active_flag = 1;
118 /* obsolete_flag must be 0 to efficiently set it on NOR flash without erasing */
119 static unsigned char obsolete_flag = 0;
122 static char default_environment[] = {
123 #if defined(CONFIG_BOOTARGS)
124 "bootargs=" CONFIG_BOOTARGS "\0"
126 #if defined(CONFIG_BOOTCOMMAND)
127 "bootcmd=" CONFIG_BOOTCOMMAND "\0"
129 #if defined(CONFIG_RAMBOOTCOMMAND)
130 "ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
132 #if defined(CONFIG_NFSBOOTCOMMAND)
133 "nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
135 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
136 "bootdelay=" __stringify(CONFIG_BOOTDELAY) "\0"
138 #if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
139 "baudrate=" __stringify(CONFIG_BAUDRATE) "\0"
141 #ifdef CONFIG_LOADS_ECHO
142 "loads_echo=" __stringify(CONFIG_LOADS_ECHO) "\0"
144 #ifdef CONFIG_ETHADDR
145 "ethaddr=" __stringify(CONFIG_ETHADDR) "\0"
147 #ifdef CONFIG_ETH1ADDR
148 "eth1addr=" __stringify(CONFIG_ETH1ADDR) "\0"
150 #ifdef CONFIG_ETH2ADDR
151 "eth2addr=" __stringify(CONFIG_ETH2ADDR) "\0"
153 #ifdef CONFIG_ETH3ADDR
154 "eth3addr=" __stringify(CONFIG_ETH3ADDR) "\0"
156 #ifdef CONFIG_ETH4ADDR
157 "eth4addr=" __stringify(CONFIG_ETH4ADDR) "\0"
159 #ifdef CONFIG_ETH5ADDR
160 "eth5addr=" __stringify(CONFIG_ETH5ADDR) "\0"
162 #ifdef CONFIG_ETHPRIME
163 "ethprime=" CONFIG_ETHPRIME "\0"
166 "ipaddr=" __stringify(CONFIG_IPADDR) "\0"
168 #ifdef CONFIG_SERVERIP
169 "serverip=" __stringify(CONFIG_SERVERIP) "\0"
171 #ifdef CONFIG_SYS_AUTOLOAD
172 "autoload=" CONFIG_SYS_AUTOLOAD "\0"
174 #ifdef CONFIG_ROOTPATH
175 "rootpath=" CONFIG_ROOTPATH "\0"
177 #ifdef CONFIG_GATEWAYIP
178 "gatewayip=" __stringify(CONFIG_GATEWAYIP) "\0"
180 #ifdef CONFIG_NETMASK
181 "netmask=" __stringify(CONFIG_NETMASK) "\0"
183 #ifdef CONFIG_HOSTNAME
184 "hostname=" __stringify(CONFIG_HOSTNAME) "\0"
186 #ifdef CONFIG_BOOTFILE
187 "bootfile=" CONFIG_BOOTFILE "\0"
189 #ifdef CONFIG_LOADADDR
190 "loadaddr=" __stringify(CONFIG_LOADADDR) "\0"
192 #ifdef CONFIG_PREBOOT
193 "preboot=" CONFIG_PREBOOT "\0"
195 #ifdef CONFIG_CLOCKS_IN_MHZ
196 "clocks_in_mhz=" "1" "\0"
198 #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
199 "pcidelay=" __stringify(CONFIG_PCI_BOOTDELAY) "\0"
201 #ifdef CONFIG_ENV_VARS_UBOOT_CONFIG
202 "arch=" CONFIG_SYS_ARCH "\0"
203 "cpu=" CONFIG_SYS_CPU "\0"
204 "board=" CONFIG_SYS_BOARD "\0"
205 #ifdef CONFIG_SYS_VENDOR
206 "vendor=" CONFIG_SYS_VENDOR "\0"
208 #ifdef CONFIG_SYS_SOC
209 "soc=" CONFIG_SYS_SOC "\0"
212 #ifdef CONFIG_EXTRA_ENV_SETTINGS
213 CONFIG_EXTRA_ENV_SETTINGS
215 "\0" /* Termimate struct environment data with 2 NULs */
218 static int flash_io (int mode);
219 static char *envmatch (char * s1, char * s2);
220 static int parse_config (void);
222 #if defined(CONFIG_FILE)
223 static int get_config (char *);
225 static inline ulong getenvsize (void)
227 ulong rc = CUR_ENVSIZE - sizeof(long);
234 static char *fw_string_blank(char *s, int noblank)
239 for (i = 0; i < len; i++, s++) {
240 if ((noblank && !WHITESPACE(*s)) ||
241 (!noblank && WHITESPACE(*s)))
251 * Search the environment for a variable.
252 * Return the value, if found, or NULL, if not found.
254 char *fw_getenv (char *name)
261 for (env = environment.data; *env; env = nxt + 1) {
264 for (nxt = env; *nxt; ++nxt) {
265 if (nxt >= &environment.data[ENV_SIZE]) {
266 fprintf (stderr, "## Error: "
267 "environment not terminated\n");
271 val = envmatch (name, env);
280 * Print the current definition of one, or more, or all
281 * environment variables
283 int fw_printenv (int argc, char *argv[])
292 if (argc == 1) { /* Print all env variables */
293 for (env = environment.data; *env; env = nxt + 1) {
294 for (nxt = env; *nxt; ++nxt) {
295 if (nxt >= &environment.data[ENV_SIZE]) {
296 fprintf (stderr, "## Error: "
297 "environment not terminated\n");
302 printf ("%s\n", env);
307 if (strcmp (argv[1], "-n") == 0) {
312 fprintf (stderr, "## Error: "
313 "`-n' option requires exactly one argument\n");
320 for (i = 1; i < argc; ++i) { /* print single env variables */
321 char *name = argv[i];
324 for (env = environment.data; *env; env = nxt + 1) {
326 for (nxt = env; *nxt; ++nxt) {
327 if (nxt >= &environment.data[ENV_SIZE]) {
328 fprintf (stderr, "## Error: "
329 "environment not terminated\n");
333 val = envmatch (name, env);
336 fputs (name, stdout);
344 fprintf (stderr, "## Error: \"%s\" not defined\n", name);
352 int fw_env_close(void)
357 *environment.crc = crc32(0, (uint8_t *) environment.data, ENV_SIZE);
359 /* write environment back to flash */
360 if (flash_io(O_RDWR)) {
362 "Error: can't write fw_env to flash\n");
371 * Set/Clear a single variable in the environment.
372 * This is called in sequence to update the environment
373 * in RAM without updating the copy in flash after each set
375 int fw_env_write(char *name, char *value)
382 * search if variable with this name already exists
384 for (nxt = env = environment.data; *env; env = nxt + 1) {
385 for (nxt = env; *nxt; ++nxt) {
386 if (nxt >= &environment.data[ENV_SIZE]) {
387 fprintf(stderr, "## Error: "
388 "environment not terminated\n");
393 if ((oldval = envmatch (name, env)) != NULL)
398 * Delete any existing definition
401 #ifndef CONFIG_ENV_OVERWRITE
403 * Ethernet Address and serial# can be set only once
406 (strcmp(name, "serial#") == 0) ||
407 ((strcmp(name, "ethaddr") == 0)
408 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
409 && (strcmp(oldval, __stringify(CONFIG_ETHADDR)) != 0)
410 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
412 fprintf (stderr, "Can't overwrite \"%s\"\n", name);
416 #endif /* CONFIG_ENV_OVERWRITE */
418 if (*++nxt == '\0') {
423 if ((*env == '\0') && (*nxt == '\0'))
432 if (!value || !strlen(value))
436 * Append new definition at the end
438 for (env = environment.data; *env || *(env + 1); ++env);
439 if (env > environment.data)
443 * "name" + "=" + "val" +"\0\0" > CUR_ENVSIZE - (env-environment)
445 len = strlen (name) + 2;
446 /* add '=' for first arg, ' ' for all others */
447 len += strlen(value) + 1;
449 if (len > (&environment.data[ENV_SIZE] - env)) {
451 "Error: environment overflow, \"%s\" deleted\n",
456 while ((*env = *name++) != '\0')
459 while ((*++env = *value++) != '\0')
462 /* end is marked with double '\0' */
469 * Deletes or sets environment variables. Returns -1 and sets errno error codes:
471 * EINVAL - need at least 1 argument
472 * EROFS - certain variables ("ethaddr", "serial#") cannot be
473 * modified or deleted
476 int fw_setenv(int argc, char *argv[])
488 fprintf(stderr, "Error: environment not initialized\n");
495 for (i = 2; i < argc; ++i) {
497 size_t val_len = strlen(val);
499 value = realloc(value, len + val_len + 1);
502 "Cannot malloc %zu bytes: %s\n",
503 len, strerror(errno));
507 memcpy(value + len, val, val_len);
511 value[len - 1] = '\0';
513 fw_env_write(name, value);
517 return fw_env_close();
521 * Parse a file and configure the u-boot variables.
522 * The script file has a very simple format, as follows:
524 * Each line has a couple with name, value:
525 * <white spaces>variable_name<white spaces>variable_value
527 * Both variable_name and variable_value are interpreted as strings.
528 * Any character after <white spaces> and before ending \r\n is interpreted
529 * as variable's value (no comment allowed on these lines !)
531 * Comments are allowed if the first character in the line is #
533 * Returns -1 and sets errno error codes:
537 int fw_parse_script(char *fname)
540 char dump[1024]; /* Maximum line length in the file */
548 fprintf(stderr, "Error: environment not initialized\n");
552 if (strcmp(fname, "-") == 0)
555 fp = fopen(fname, "r");
557 fprintf(stderr, "I cannot open %s for reading\n",
563 while (fgets(dump, sizeof(dump), fp)) {
568 * Read a whole line from the file. If the line is too long
569 * or is not terminated, reports an error and exit.
571 if (dump[len - 1] != '\n') {
573 "Line %d not corrected terminated or too long\n",
579 /* Drop ending line feed / carriage return */
580 while (len > 0 && (dump[len - 1] == '\n' ||
581 dump[len - 1] == '\r')) {
582 dump[len - 1] = '\0';
586 /* Skip comment or empty lines */
587 if ((len == 0) || dump[0] == '#')
591 * Search for variable's name,
592 * remove leading whitespaces
594 name = fw_string_blank(dump, 1);
598 /* The first white space is the end of variable name */
599 val = fw_string_blank(name, 0);
603 if ((val - name) < len)
604 val = fw_string_blank(val, 1);
610 fprintf(stderr, "Setting %s : %s\n",
611 name, val ? val : " removed");
615 * If there is an error setting a variable,
616 * try to save the environment and returns an error
618 if (fw_env_write(name, val)) {
620 "fw_env_write returns with error : %s\n",
628 /* Close file if not stdin */
629 if (strcmp(fname, "-") != 0)
632 ret |= fw_env_close();
639 * Test for bad block on NAND, just returns 0 on NOR, on NAND:
642 * < 0 - failed to test
644 static int flash_bad_block (int fd, uint8_t mtd_type, loff_t *blockstart)
646 if (mtd_type == MTD_NANDFLASH) {
647 int badblock = ioctl (fd, MEMGETBADBLOCK, blockstart);
650 perror ("Cannot read bad block mark");
656 fprintf (stderr, "Bad block at 0x%llx, "
657 "skipping\n", *blockstart);
667 * Read data from flash at an offset into a provided buffer. On NAND it skips
668 * bad blocks but makes sure it stays within ENVSECTORS (dev) starting from
669 * the DEVOFFSET (dev) block. On NOR the loop is only run once.
671 static int flash_read_buf (int dev, int fd, void *buf, size_t count,
672 off_t offset, uint8_t mtd_type)
674 size_t blocklen; /* erase / write length - one block on NAND,
676 size_t processed = 0; /* progress counter */
677 size_t readlen = count; /* current read length */
678 off_t top_of_range; /* end of the last block we may use */
679 off_t block_seek; /* offset inside the current block to the start
681 loff_t blockstart; /* running start of the current block -
682 MEMGETBADBLOCK needs 64 bits */
685 blockstart = (offset / DEVESIZE (dev)) * DEVESIZE (dev);
687 /* Offset inside a block */
688 block_seek = offset - blockstart;
690 if (mtd_type == MTD_NANDFLASH) {
692 * NAND: calculate which blocks we are reading. We have
693 * to read one block at a time to skip bad blocks.
695 blocklen = DEVESIZE (dev);
698 * To calculate the top of the range, we have to use the
699 * global DEVOFFSET (dev), which can be different from offset
701 top_of_range = ((DEVOFFSET(dev) / blocklen) +
702 ENVSECTORS (dev)) * blocklen;
704 /* Limit to one block for the first read */
705 if (readlen > blocklen - block_seek)
706 readlen = blocklen - block_seek;
709 top_of_range = offset + count;
712 /* This only runs once on NOR flash */
713 while (processed < count) {
714 rc = flash_bad_block (fd, mtd_type, &blockstart);
715 if (rc < 0) /* block test failed */
718 if (blockstart + block_seek + readlen > top_of_range) {
719 /* End of range is reached */
721 "Too few good blocks within range\n");
725 if (rc) { /* block is bad */
726 blockstart += blocklen;
731 * If a block is bad, we retry in the next block at the same
732 * offset - see common/env_nand.c::writeenv()
734 lseek (fd, blockstart + block_seek, SEEK_SET);
736 rc = read (fd, buf + processed, readlen);
738 fprintf (stderr, "Read error on %s: %s\n",
739 DEVNAME (dev), strerror (errno));
743 fprintf (stderr, "Read 0x%x bytes at 0x%llx\n",
744 rc, blockstart + block_seek);
746 processed += readlen;
747 readlen = min (blocklen, count - processed);
749 blockstart += blocklen;
756 * Write count bytes at offset, but stay within ENVSECTORS (dev) sectors of
757 * DEVOFFSET (dev). Similar to the read case above, on NOR and dataflash we
758 * erase and write the whole data at once.
760 static int flash_write_buf (int dev, int fd, void *buf, size_t count,
761 off_t offset, uint8_t mtd_type)
764 struct erase_info_user erase;
765 size_t blocklen; /* length of NAND block / NOR erase sector */
766 size_t erase_len; /* whole area that can be erased - may include
768 size_t erasesize; /* erase / write length - one block on NAND,
770 size_t processed = 0; /* progress counter */
771 size_t write_total; /* total size to actually write - excluding
773 off_t erase_offset; /* offset to the first erase block (aligned)
775 off_t block_seek; /* offset inside the erase block to the start
777 off_t top_of_range; /* end of the last block we may use */
778 loff_t blockstart; /* running start of the current block -
779 MEMGETBADBLOCK needs 64 bits */
782 blocklen = DEVESIZE (dev);
784 top_of_range = ((DEVOFFSET(dev) / blocklen) +
785 ENVSECTORS (dev)) * blocklen;
787 erase_offset = (offset / blocklen) * blocklen;
789 /* Maximum area we may use */
790 erase_len = top_of_range - erase_offset;
792 blockstart = erase_offset;
793 /* Offset inside a block */
794 block_seek = offset - erase_offset;
797 * Data size we actually have to write: from the start of the block
798 * to the start of the data, then count bytes of data, and to the
801 write_total = ((block_seek + count + blocklen - 1) /
802 blocklen) * blocklen;
805 * Support data anywhere within erase sectors: read out the complete
806 * area to be erased, replace the environment image, write the whole
809 if (write_total > count) {
810 data = malloc (erase_len);
813 "Cannot malloc %zu bytes: %s\n",
814 erase_len, strerror (errno));
818 rc = flash_read_buf (dev, fd, data, write_total, erase_offset,
820 if (write_total != rc)
823 /* Overwrite the old environment */
824 memcpy (data + block_seek, buf, count);
827 * We get here, iff offset is block-aligned and count is a
828 * multiple of blocklen - see write_total calculation above
833 if (mtd_type == MTD_NANDFLASH) {
835 * NAND: calculate which blocks we are writing. We have
836 * to write one block at a time to skip bad blocks.
838 erasesize = blocklen;
840 erasesize = erase_len;
843 erase.length = erasesize;
845 /* This only runs once on NOR flash and SPI-dataflash */
846 while (processed < write_total) {
847 rc = flash_bad_block (fd, mtd_type, &blockstart);
848 if (rc < 0) /* block test failed */
851 if (blockstart + erasesize > top_of_range) {
852 fprintf (stderr, "End of range reached, aborting\n");
856 if (rc) { /* block is bad */
857 blockstart += blocklen;
861 erase.start = blockstart;
862 ioctl (fd, MEMUNLOCK, &erase);
864 /* Dataflash does not need an explicit erase cycle */
865 if (mtd_type != MTD_DATAFLASH)
866 if (ioctl (fd, MEMERASE, &erase) != 0) {
867 fprintf (stderr, "MTD erase error on %s: %s\n",
873 if (lseek (fd, blockstart, SEEK_SET) == -1) {
875 "Seek error on %s: %s\n",
876 DEVNAME (dev), strerror (errno));
881 printf ("Write 0x%x bytes at 0x%llx\n", erasesize, blockstart);
883 if (write (fd, data + processed, erasesize) != erasesize) {
884 fprintf (stderr, "Write error on %s: %s\n",
885 DEVNAME (dev), strerror (errno));
889 ioctl (fd, MEMLOCK, &erase);
891 processed += blocklen;
893 blockstart += blocklen;
896 if (write_total > count)
903 * Set obsolete flag at offset - NOR flash only
905 static int flash_flag_obsolete (int dev, int fd, off_t offset)
908 struct erase_info_user erase;
910 erase.start = DEVOFFSET (dev);
911 erase.length = DEVESIZE (dev);
912 /* This relies on the fact, that obsolete_flag == 0 */
913 rc = lseek (fd, offset, SEEK_SET);
915 fprintf (stderr, "Cannot seek to set the flag on %s \n",
919 ioctl (fd, MEMUNLOCK, &erase);
920 rc = write (fd, &obsolete_flag, sizeof (obsolete_flag));
921 ioctl (fd, MEMLOCK, &erase);
923 perror ("Could not set obsolete flag");
928 static int flash_write (int fd_current, int fd_target, int dev_target)
932 switch (environment.flag_scheme) {
935 case FLAG_INCREMENTAL:
936 (*environment.flags)++;
939 *environment.flags = active_flag;
942 fprintf (stderr, "Unimplemented flash scheme %u \n",
943 environment.flag_scheme);
948 printf ("Writing new environment at 0x%lx on %s\n",
949 DEVOFFSET (dev_target), DEVNAME (dev_target));
951 rc = flash_write_buf(dev_target, fd_target, environment.image,
952 CUR_ENVSIZE, DEVOFFSET(dev_target),
953 DEVTYPE(dev_target));
957 if (environment.flag_scheme == FLAG_BOOLEAN) {
958 /* Have to set obsolete flag */
959 off_t offset = DEVOFFSET (dev_current) +
960 offsetof (struct env_image_redundant, flags);
962 printf ("Setting obsolete flag in environment at 0x%lx on %s\n",
963 DEVOFFSET (dev_current), DEVNAME (dev_current));
965 flash_flag_obsolete (dev_current, fd_current, offset);
971 static int flash_read (int fd)
973 struct mtd_info_user mtdinfo;
976 rc = ioctl (fd, MEMGETINFO, &mtdinfo);
978 perror ("Cannot get MTD information");
982 if (mtdinfo.type != MTD_NORFLASH &&
983 mtdinfo.type != MTD_NANDFLASH &&
984 mtdinfo.type != MTD_DATAFLASH) {
985 fprintf (stderr, "Unsupported flash type %u\n", mtdinfo.type);
989 DEVTYPE(dev_current) = mtdinfo.type;
991 rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE,
992 DEVOFFSET (dev_current), mtdinfo.type);
994 return (rc != CUR_ENVSIZE) ? -1 : 0;
997 static int flash_io (int mode)
999 int fd_current, fd_target, rc, dev_target;
1001 /* dev_current: fd_current, erase_current */
1002 fd_current = open (DEVNAME (dev_current), mode);
1003 if (fd_current < 0) {
1005 "Can't open %s: %s\n",
1006 DEVNAME (dev_current), strerror (errno));
1010 if (mode == O_RDWR) {
1011 if (HaveRedundEnv) {
1012 /* switch to next partition for writing */
1013 dev_target = !dev_current;
1014 /* dev_target: fd_target, erase_target */
1015 fd_target = open (DEVNAME (dev_target), mode);
1016 if (fd_target < 0) {
1018 "Can't open %s: %s\n",
1019 DEVNAME (dev_target),
1025 dev_target = dev_current;
1026 fd_target = fd_current;
1029 rc = flash_write (fd_current, fd_target, dev_target);
1031 if (HaveRedundEnv) {
1032 if (close (fd_target)) {
1034 "I/O error on %s: %s\n",
1035 DEVNAME (dev_target),
1041 rc = flash_read (fd_current);
1045 if (close (fd_current)) {
1047 "I/O error on %s: %s\n",
1048 DEVNAME (dev_current), strerror (errno));
1056 * s1 is either a simple 'name', or a 'name=value' pair.
1057 * s2 is a 'name=value' pair.
1058 * If the names match, return the value of s2, else NULL.
1061 static char *envmatch (char * s1, char * s2)
1064 while (*s1 == *s2++)
1067 if (*s1 == '\0' && *(s2 - 1) == '=')
1073 * Prevent confusion if running from erased flash memory
1075 int fw_env_open(void)
1078 unsigned char flag0;
1082 unsigned char flag1;
1085 struct env_image_single *single;
1086 struct env_image_redundant *redundant;
1088 if (parse_config ()) /* should fill envdevices */
1091 addr0 = calloc(1, CUR_ENVSIZE);
1092 if (addr0 == NULL) {
1094 "Not enough memory for environment (%ld bytes)\n",
1099 /* read environment from FLASH to local buffer */
1100 environment.image = addr0;
1102 if (HaveRedundEnv) {
1104 environment.crc = &redundant->crc;
1105 environment.flags = &redundant->flags;
1106 environment.data = redundant->data;
1109 environment.crc = &single->crc;
1110 environment.flags = NULL;
1111 environment.data = single->data;
1115 if (flash_io (O_RDONLY))
1118 crc0 = crc32 (0, (uint8_t *) environment.data, ENV_SIZE);
1119 crc0_ok = (crc0 == *environment.crc);
1120 if (!HaveRedundEnv) {
1123 "Warning: Bad CRC, using default environment\n");
1124 memcpy(environment.data, default_environment, sizeof default_environment);
1127 flag0 = *environment.flags;
1130 addr1 = calloc(1, CUR_ENVSIZE);
1131 if (addr1 == NULL) {
1133 "Not enough memory for environment (%ld bytes)\n",
1140 * have to set environment.image for flash_read(), careful -
1141 * other pointers in environment still point inside addr0
1143 environment.image = addr1;
1144 if (flash_io (O_RDONLY))
1147 /* Check flag scheme compatibility */
1148 if (DEVTYPE(dev_current) == MTD_NORFLASH &&
1149 DEVTYPE(!dev_current) == MTD_NORFLASH) {
1150 environment.flag_scheme = FLAG_BOOLEAN;
1151 } else if (DEVTYPE(dev_current) == MTD_NANDFLASH &&
1152 DEVTYPE(!dev_current) == MTD_NANDFLASH) {
1153 environment.flag_scheme = FLAG_INCREMENTAL;
1154 } else if (DEVTYPE(dev_current) == MTD_DATAFLASH &&
1155 DEVTYPE(!dev_current) == MTD_DATAFLASH) {
1156 environment.flag_scheme = FLAG_BOOLEAN;
1158 fprintf (stderr, "Incompatible flash types!\n");
1162 crc1 = crc32 (0, (uint8_t *) redundant->data, ENV_SIZE);
1163 crc1_ok = (crc1 == redundant->crc);
1164 flag1 = redundant->flags;
1166 if (crc0_ok && !crc1_ok) {
1168 } else if (!crc0_ok && crc1_ok) {
1170 } else if (!crc0_ok && !crc1_ok) {
1172 "Warning: Bad CRC, using default environment\n");
1173 memcpy (environment.data, default_environment,
1174 sizeof default_environment);
1177 switch (environment.flag_scheme) {
1179 if (flag0 == active_flag &&
1180 flag1 == obsolete_flag) {
1182 } else if (flag0 == obsolete_flag &&
1183 flag1 == active_flag) {
1185 } else if (flag0 == flag1) {
1187 } else if (flag0 == 0xFF) {
1189 } else if (flag1 == 0xFF) {
1195 case FLAG_INCREMENTAL:
1196 if (flag0 == 255 && flag1 == 0)
1198 else if ((flag1 == 255 && flag0 == 0) ||
1201 else /* flag1 > flag0 */
1205 fprintf (stderr, "Unknown flag scheme %u \n",
1206 environment.flag_scheme);
1212 * If we are reading, we don't need the flag and the CRC any
1213 * more, if we are writing, we will re-calculate CRC and update
1214 * flags before writing out
1217 environment.image = addr1;
1218 environment.crc = &redundant->crc;
1219 environment.flags = &redundant->flags;
1220 environment.data = redundant->data;
1223 environment.image = addr0;
1224 /* Other pointers are already set */
1232 static int parse_config ()
1236 #if defined(CONFIG_FILE)
1237 /* Fills in DEVNAME(), ENVSIZE(), DEVESIZE(). Or don't. */
1238 if (get_config (CONFIG_FILE)) {
1240 "Cannot parse config file: %s\n", strerror (errno));
1244 strcpy (DEVNAME (0), DEVICE1_NAME);
1245 DEVOFFSET (0) = DEVICE1_OFFSET;
1246 ENVSIZE (0) = ENV1_SIZE;
1247 /* Default values are: erase-size=env-size, #sectors=1 */
1248 DEVESIZE (0) = ENVSIZE (0);
1250 #ifdef DEVICE1_ESIZE
1251 DEVESIZE (0) = DEVICE1_ESIZE;
1253 #ifdef DEVICE1_ENVSECTORS
1254 ENVSECTORS (0) = DEVICE1_ENVSECTORS;
1258 strcpy (DEVNAME (1), DEVICE2_NAME);
1259 DEVOFFSET (1) = DEVICE2_OFFSET;
1260 ENVSIZE (1) = ENV2_SIZE;
1261 /* Default values are: erase-size=env-size, #sectors=1 */
1262 DEVESIZE (1) = ENVSIZE (1);
1264 #ifdef DEVICE2_ESIZE
1265 DEVESIZE (1) = DEVICE2_ESIZE;
1267 #ifdef DEVICE2_ENVSECTORS
1268 ENVSECTORS (1) = DEVICE2_ENVSECTORS;
1273 if (stat (DEVNAME (0), &st)) {
1275 "Cannot access MTD device %s: %s\n",
1276 DEVNAME (0), strerror (errno));
1280 if (HaveRedundEnv && stat (DEVNAME (1), &st)) {
1282 "Cannot access MTD device %s: %s\n",
1283 DEVNAME (1), strerror (errno));
1289 #if defined(CONFIG_FILE)
1290 static int get_config (char *fname)
1297 fp = fopen (fname, "r");
1301 while (i < 2 && fgets (dump, sizeof (dump), fp)) {
1302 /* Skip incomplete conversions and comment strings */
1306 rc = sscanf (dump, "%s %lx %lx %lx %lx",
1317 /* Assume the erase size is the same as the env-size */
1318 DEVESIZE(i) = ENVSIZE(i);
1321 /* Default - 1 sector */
1328 HaveRedundEnv = i - 1;
1329 if (!i) { /* No valid entries found */