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,
29 #include <linux/stringify.h>
34 #include <sys/types.h>
35 #include <sys/ioctl.h>
41 # include <linux/mtd/mtd.h>
43 # define __user /* nothing */
44 # include <mtd/mtd-user.h>
49 #define WHITESPACE(c) ((c == '\t') || (c == ' '))
51 #define min(x, y) ({ \
52 typeof(x) _min1 = (x); \
53 typeof(y) _min2 = (y); \
54 (void) (&_min1 == &_min2); \
55 _min1 < _min2 ? _min1 : _min2; })
58 char devname[16]; /* Device name */
59 ulong devoff; /* Device offset */
60 ulong env_size; /* environment size */
61 ulong erase_size; /* device erase size */
62 ulong env_sectors; /* number of environment sectors */
63 uint8_t mtd_type; /* type of the MTD device */
66 static struct envdev_s envdevices[2] =
69 .mtd_type = MTD_ABSENT,
71 .mtd_type = MTD_ABSENT,
74 static int dev_current;
76 #define DEVNAME(i) envdevices[(i)].devname
77 #define DEVOFFSET(i) envdevices[(i)].devoff
78 #define ENVSIZE(i) envdevices[(i)].env_size
79 #define DEVESIZE(i) envdevices[(i)].erase_size
80 #define ENVSECTORS(i) envdevices[(i)].env_sectors
81 #define DEVTYPE(i) envdevices[(i)].mtd_type
83 #define CUR_ENVSIZE ENVSIZE(dev_current)
85 #define ENV_SIZE getenvsize()
87 struct env_image_single {
88 uint32_t crc; /* CRC32 over data bytes */
92 struct env_image_redundant {
93 uint32_t crc; /* CRC32 over data bytes */
94 unsigned char flags; /* active or obsolete */
107 unsigned char *flags;
109 enum flag_scheme flag_scheme;
112 static struct environment environment = {
113 .flag_scheme = FLAG_NONE,
116 static int HaveRedundEnv = 0;
118 static unsigned char active_flag = 1;
119 /* obsolete_flag must be 0 to efficiently set it on NOR flash without erasing */
120 static unsigned char obsolete_flag = 0;
123 static char default_environment[] = {
124 #if defined(CONFIG_BOOTARGS)
125 "bootargs=" CONFIG_BOOTARGS "\0"
127 #if defined(CONFIG_BOOTCOMMAND)
128 "bootcmd=" CONFIG_BOOTCOMMAND "\0"
130 #if defined(CONFIG_RAMBOOTCOMMAND)
131 "ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
133 #if defined(CONFIG_NFSBOOTCOMMAND)
134 "nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
136 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
137 "bootdelay=" __stringify(CONFIG_BOOTDELAY) "\0"
139 #if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
140 "baudrate=" __stringify(CONFIG_BAUDRATE) "\0"
142 #ifdef CONFIG_LOADS_ECHO
143 "loads_echo=" __stringify(CONFIG_LOADS_ECHO) "\0"
145 #ifdef CONFIG_ETHADDR
146 "ethaddr=" __stringify(CONFIG_ETHADDR) "\0"
148 #ifdef CONFIG_ETH1ADDR
149 "eth1addr=" __stringify(CONFIG_ETH1ADDR) "\0"
151 #ifdef CONFIG_ETH2ADDR
152 "eth2addr=" __stringify(CONFIG_ETH2ADDR) "\0"
154 #ifdef CONFIG_ETH3ADDR
155 "eth3addr=" __stringify(CONFIG_ETH3ADDR) "\0"
157 #ifdef CONFIG_ETH4ADDR
158 "eth4addr=" __stringify(CONFIG_ETH4ADDR) "\0"
160 #ifdef CONFIG_ETH5ADDR
161 "eth5addr=" __stringify(CONFIG_ETH5ADDR) "\0"
163 #ifdef CONFIG_ETHPRIME
164 "ethprime=" CONFIG_ETHPRIME "\0"
167 "ipaddr=" __stringify(CONFIG_IPADDR) "\0"
169 #ifdef CONFIG_SERVERIP
170 "serverip=" __stringify(CONFIG_SERVERIP) "\0"
172 #ifdef CONFIG_SYS_AUTOLOAD
173 "autoload=" CONFIG_SYS_AUTOLOAD "\0"
175 #ifdef CONFIG_ROOTPATH
176 "rootpath=" CONFIG_ROOTPATH "\0"
178 #ifdef CONFIG_GATEWAYIP
179 "gatewayip=" __stringify(CONFIG_GATEWAYIP) "\0"
181 #ifdef CONFIG_NETMASK
182 "netmask=" __stringify(CONFIG_NETMASK) "\0"
184 #ifdef CONFIG_HOSTNAME
185 "hostname=" __stringify(CONFIG_HOSTNAME) "\0"
187 #ifdef CONFIG_BOOTFILE
188 "bootfile=" CONFIG_BOOTFILE "\0"
190 #ifdef CONFIG_LOADADDR
191 "loadaddr=" __stringify(CONFIG_LOADADDR) "\0"
193 #ifdef CONFIG_PREBOOT
194 "preboot=" CONFIG_PREBOOT "\0"
196 #ifdef CONFIG_CLOCKS_IN_MHZ
197 "clocks_in_mhz=" "1" "\0"
199 #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
200 "pcidelay=" __stringify(CONFIG_PCI_BOOTDELAY) "\0"
202 #ifdef CONFIG_ENV_VARS_UBOOT_CONFIG
203 "arch=" CONFIG_SYS_ARCH "\0"
204 "cpu=" CONFIG_SYS_CPU "\0"
205 "board=" CONFIG_SYS_BOARD "\0"
206 #ifdef CONFIG_SYS_VENDOR
207 "vendor=" CONFIG_SYS_VENDOR "\0"
209 #ifdef CONFIG_SYS_SOC
210 "soc=" CONFIG_SYS_SOC "\0"
213 #ifdef CONFIG_EXTRA_ENV_SETTINGS
214 CONFIG_EXTRA_ENV_SETTINGS
216 "\0" /* Termimate struct environment data with 2 NULs */
219 static int flash_io (int mode);
220 static char *envmatch (char * s1, char * s2);
221 static int parse_config (void);
223 #if defined(CONFIG_FILE)
224 static int get_config (char *);
226 static inline ulong getenvsize (void)
228 ulong rc = CUR_ENVSIZE - sizeof(long);
235 static char *fw_string_blank(char *s, int noblank)
240 for (i = 0; i < len; i++, s++) {
241 if ((noblank && !WHITESPACE(*s)) ||
242 (!noblank && WHITESPACE(*s)))
252 * Search the environment for a variable.
253 * Return the value, if found, or NULL, if not found.
255 char *fw_getenv (char *name)
259 for (env = environment.data; *env; env = nxt + 1) {
262 for (nxt = env; *nxt; ++nxt) {
263 if (nxt >= &environment.data[ENV_SIZE]) {
264 fprintf (stderr, "## Error: "
265 "environment not terminated\n");
269 val = envmatch (name, env);
278 * Print the current definition of one, or more, or all
279 * environment variables
281 int fw_printenv (int argc, char *argv[])
290 if (argc == 1) { /* Print all env variables */
291 for (env = environment.data; *env; env = nxt + 1) {
292 for (nxt = env; *nxt; ++nxt) {
293 if (nxt >= &environment.data[ENV_SIZE]) {
294 fprintf (stderr, "## Error: "
295 "environment not terminated\n");
300 printf ("%s\n", env);
305 if (strcmp (argv[1], "-n") == 0) {
310 fprintf (stderr, "## Error: "
311 "`-n' option requires exactly one argument\n");
318 for (i = 1; i < argc; ++i) { /* print single env variables */
319 char *name = argv[i];
322 for (env = environment.data; *env; env = nxt + 1) {
324 for (nxt = env; *nxt; ++nxt) {
325 if (nxt >= &environment.data[ENV_SIZE]) {
326 fprintf (stderr, "## Error: "
327 "environment not terminated\n");
331 val = envmatch (name, env);
334 fputs (name, stdout);
342 fprintf (stderr, "## Error: \"%s\" not defined\n", name);
350 int fw_env_close(void)
355 *environment.crc = crc32(0, (uint8_t *) environment.data, ENV_SIZE);
357 /* write environment back to flash */
358 if (flash_io(O_RDWR)) {
360 "Error: can't write fw_env to flash\n");
369 * Set/Clear a single variable in the environment.
370 * This is called in sequence to update the environment
371 * in RAM without updating the copy in flash after each set
373 int fw_env_write(char *name, char *value)
380 * search if variable with this name already exists
382 for (nxt = env = environment.data; *env; env = nxt + 1) {
383 for (nxt = env; *nxt; ++nxt) {
384 if (nxt >= &environment.data[ENV_SIZE]) {
385 fprintf(stderr, "## Error: "
386 "environment not terminated\n");
391 if ((oldval = envmatch (name, env)) != NULL)
396 * Delete any existing definition
399 #ifndef CONFIG_ENV_OVERWRITE
401 * Ethernet Address and serial# can be set only once
404 (strcmp(name, "serial#") == 0) ||
405 ((strcmp(name, "ethaddr") == 0)
406 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
407 && (strcmp(oldval, __stringify(CONFIG_ETHADDR)) != 0)
408 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
410 fprintf (stderr, "Can't overwrite \"%s\"\n", name);
414 #endif /* CONFIG_ENV_OVERWRITE */
416 if (*++nxt == '\0') {
421 if ((*env == '\0') && (*nxt == '\0'))
430 if (!value || !strlen(value))
434 * Append new definition at the end
436 for (env = environment.data; *env || *(env + 1); ++env);
437 if (env > environment.data)
441 * "name" + "=" + "val" +"\0\0" > CUR_ENVSIZE - (env-environment)
443 len = strlen (name) + 2;
444 /* add '=' for first arg, ' ' for all others */
445 len += strlen(value) + 1;
447 if (len > (&environment.data[ENV_SIZE] - env)) {
449 "Error: environment overflow, \"%s\" deleted\n",
454 while ((*env = *name++) != '\0')
457 while ((*++env = *value++) != '\0')
460 /* end is marked with double '\0' */
467 * Deletes or sets environment variables. Returns -1 and sets errno error codes:
469 * EINVAL - need at least 1 argument
470 * EROFS - certain variables ("ethaddr", "serial#") cannot be
471 * modified or deleted
474 int fw_setenv(int argc, char *argv[])
486 fprintf(stderr, "Error: environment not initialized\n");
493 for (i = 2; i < argc; ++i) {
495 size_t val_len = strlen(val);
497 value = realloc(value, len + val_len + 1);
500 "Cannot malloc %zu bytes: %s\n",
501 len, strerror(errno));
505 memcpy(value + len, val, val_len);
509 value[len - 1] = '\0';
511 fw_env_write(name, value);
515 return fw_env_close();
519 * Parse a file and configure the u-boot variables.
520 * The script file has a very simple format, as follows:
522 * Each line has a couple with name, value:
523 * <white spaces>variable_name<white spaces>variable_value
525 * Both variable_name and variable_value are interpreted as strings.
526 * Any character after <white spaces> and before ending \r\n is interpreted
527 * as variable's value (no comment allowed on these lines !)
529 * Comments are allowed if the first character in the line is #
531 * Returns -1 and sets errno error codes:
535 int fw_parse_script(char *fname)
538 char dump[1024]; /* Maximum line length in the file */
546 fprintf(stderr, "Error: environment not initialized\n");
550 if (strcmp(fname, "-") == 0)
553 fp = fopen(fname, "r");
555 fprintf(stderr, "I cannot open %s for reading\n",
561 while (fgets(dump, sizeof(dump), fp)) {
566 * Read a whole line from the file. If the line is too long
567 * or is not terminated, reports an error and exit.
569 if (dump[len - 1] != '\n') {
571 "Line %d not corrected terminated or too long\n",
577 /* Drop ending line feed / carriage return */
578 while (len > 0 && (dump[len - 1] == '\n' ||
579 dump[len - 1] == '\r')) {
580 dump[len - 1] = '\0';
584 /* Skip comment or empty lines */
585 if ((len == 0) || dump[0] == '#')
589 * Search for variable's name,
590 * remove leading whitespaces
592 name = fw_string_blank(dump, 1);
596 /* The first white space is the end of variable name */
597 val = fw_string_blank(name, 0);
601 if ((val - name) < len)
602 val = fw_string_blank(val, 1);
608 fprintf(stderr, "Setting %s : %s\n",
609 name, val ? val : " removed");
613 * If there is an error setting a variable,
614 * try to save the environment and returns an error
616 if (fw_env_write(name, val)) {
618 "fw_env_write returns with error : %s\n",
626 /* Close file if not stdin */
627 if (strcmp(fname, "-") != 0)
630 ret |= fw_env_close();
637 * Test for bad block on NAND, just returns 0 on NOR, on NAND:
640 * < 0 - failed to test
642 static int flash_bad_block (int fd, uint8_t mtd_type, loff_t *blockstart)
644 if (mtd_type == MTD_NANDFLASH) {
645 int badblock = ioctl (fd, MEMGETBADBLOCK, blockstart);
648 perror ("Cannot read bad block mark");
654 fprintf (stderr, "Bad block at 0x%llx, "
655 "skipping\n", *blockstart);
665 * Read data from flash at an offset into a provided buffer. On NAND it skips
666 * bad blocks but makes sure it stays within ENVSECTORS (dev) starting from
667 * the DEVOFFSET (dev) block. On NOR the loop is only run once.
669 static int flash_read_buf (int dev, int fd, void *buf, size_t count,
670 off_t offset, uint8_t mtd_type)
672 size_t blocklen; /* erase / write length - one block on NAND,
674 size_t processed = 0; /* progress counter */
675 size_t readlen = count; /* current read length */
676 off_t top_of_range; /* end of the last block we may use */
677 off_t block_seek; /* offset inside the current block to the start
679 loff_t blockstart; /* running start of the current block -
680 MEMGETBADBLOCK needs 64 bits */
683 blockstart = (offset / DEVESIZE (dev)) * DEVESIZE (dev);
685 /* Offset inside a block */
686 block_seek = offset - blockstart;
688 if (mtd_type == MTD_NANDFLASH) {
690 * NAND: calculate which blocks we are reading. We have
691 * to read one block at a time to skip bad blocks.
693 blocklen = DEVESIZE (dev);
696 * To calculate the top of the range, we have to use the
697 * global DEVOFFSET (dev), which can be different from offset
699 top_of_range = ((DEVOFFSET(dev) / blocklen) +
700 ENVSECTORS (dev)) * blocklen;
702 /* Limit to one block for the first read */
703 if (readlen > blocklen - block_seek)
704 readlen = blocklen - block_seek;
707 top_of_range = offset + count;
710 /* This only runs once on NOR flash */
711 while (processed < count) {
712 rc = flash_bad_block (fd, mtd_type, &blockstart);
713 if (rc < 0) /* block test failed */
716 if (blockstart + block_seek + readlen > top_of_range) {
717 /* End of range is reached */
719 "Too few good blocks within range\n");
723 if (rc) { /* block is bad */
724 blockstart += blocklen;
729 * If a block is bad, we retry in the next block at the same
730 * offset - see common/env_nand.c::writeenv()
732 lseek (fd, blockstart + block_seek, SEEK_SET);
734 rc = read (fd, buf + processed, readlen);
736 fprintf (stderr, "Read error on %s: %s\n",
737 DEVNAME (dev), strerror (errno));
741 fprintf (stderr, "Read 0x%x bytes at 0x%llx\n",
742 rc, blockstart + block_seek);
744 processed += readlen;
745 readlen = min (blocklen, count - processed);
747 blockstart += blocklen;
754 * Write count bytes at offset, but stay within ENVSECTORS (dev) sectors of
755 * DEVOFFSET (dev). Similar to the read case above, on NOR and dataflash we
756 * erase and write the whole data at once.
758 static int flash_write_buf (int dev, int fd, void *buf, size_t count,
759 off_t offset, uint8_t mtd_type)
762 struct erase_info_user erase;
763 size_t blocklen; /* length of NAND block / NOR erase sector */
764 size_t erase_len; /* whole area that can be erased - may include
766 size_t erasesize; /* erase / write length - one block on NAND,
768 size_t processed = 0; /* progress counter */
769 size_t write_total; /* total size to actually write - excluding
771 off_t erase_offset; /* offset to the first erase block (aligned)
773 off_t block_seek; /* offset inside the erase block to the start
775 off_t top_of_range; /* end of the last block we may use */
776 loff_t blockstart; /* running start of the current block -
777 MEMGETBADBLOCK needs 64 bits */
780 blocklen = DEVESIZE (dev);
782 top_of_range = ((DEVOFFSET(dev) / blocklen) +
783 ENVSECTORS (dev)) * blocklen;
785 erase_offset = (offset / blocklen) * blocklen;
787 /* Maximum area we may use */
788 erase_len = top_of_range - erase_offset;
790 blockstart = erase_offset;
791 /* Offset inside a block */
792 block_seek = offset - erase_offset;
795 * Data size we actually have to write: from the start of the block
796 * to the start of the data, then count bytes of data, and to the
799 write_total = ((block_seek + count + blocklen - 1) /
800 blocklen) * blocklen;
803 * Support data anywhere within erase sectors: read out the complete
804 * area to be erased, replace the environment image, write the whole
807 if (write_total > count) {
808 data = malloc (erase_len);
811 "Cannot malloc %zu bytes: %s\n",
812 erase_len, strerror (errno));
816 rc = flash_read_buf (dev, fd, data, write_total, erase_offset,
818 if (write_total != rc)
821 /* Overwrite the old environment */
822 memcpy (data + block_seek, buf, count);
825 * We get here, iff offset is block-aligned and count is a
826 * multiple of blocklen - see write_total calculation above
831 if (mtd_type == MTD_NANDFLASH) {
833 * NAND: calculate which blocks we are writing. We have
834 * to write one block at a time to skip bad blocks.
836 erasesize = blocklen;
838 erasesize = erase_len;
841 erase.length = erasesize;
843 /* This only runs once on NOR flash and SPI-dataflash */
844 while (processed < write_total) {
845 rc = flash_bad_block (fd, mtd_type, &blockstart);
846 if (rc < 0) /* block test failed */
849 if (blockstart + erasesize > top_of_range) {
850 fprintf (stderr, "End of range reached, aborting\n");
854 if (rc) { /* block is bad */
855 blockstart += blocklen;
859 erase.start = blockstart;
860 ioctl (fd, MEMUNLOCK, &erase);
862 /* Dataflash does not need an explicit erase cycle */
863 if (mtd_type != MTD_DATAFLASH)
864 if (ioctl (fd, MEMERASE, &erase) != 0) {
865 fprintf (stderr, "MTD erase error on %s: %s\n",
871 if (lseek (fd, blockstart, SEEK_SET) == -1) {
873 "Seek error on %s: %s\n",
874 DEVNAME (dev), strerror (errno));
879 printf ("Write 0x%x bytes at 0x%llx\n", erasesize, blockstart);
881 if (write (fd, data + processed, erasesize) != erasesize) {
882 fprintf (stderr, "Write error on %s: %s\n",
883 DEVNAME (dev), strerror (errno));
887 ioctl (fd, MEMLOCK, &erase);
889 processed += blocklen;
891 blockstart += blocklen;
894 if (write_total > count)
901 * Set obsolete flag at offset - NOR flash only
903 static int flash_flag_obsolete (int dev, int fd, off_t offset)
906 struct erase_info_user erase;
908 erase.start = DEVOFFSET (dev);
909 erase.length = DEVESIZE (dev);
910 /* This relies on the fact, that obsolete_flag == 0 */
911 rc = lseek (fd, offset, SEEK_SET);
913 fprintf (stderr, "Cannot seek to set the flag on %s \n",
917 ioctl (fd, MEMUNLOCK, &erase);
918 rc = write (fd, &obsolete_flag, sizeof (obsolete_flag));
919 ioctl (fd, MEMLOCK, &erase);
921 perror ("Could not set obsolete flag");
926 static int flash_write (int fd_current, int fd_target, int dev_target)
930 switch (environment.flag_scheme) {
933 case FLAG_INCREMENTAL:
934 (*environment.flags)++;
937 *environment.flags = active_flag;
940 fprintf (stderr, "Unimplemented flash scheme %u \n",
941 environment.flag_scheme);
946 printf ("Writing new environment at 0x%lx on %s\n",
947 DEVOFFSET (dev_target), DEVNAME (dev_target));
949 rc = flash_write_buf(dev_target, fd_target, environment.image,
950 CUR_ENVSIZE, DEVOFFSET(dev_target),
951 DEVTYPE(dev_target));
955 if (environment.flag_scheme == FLAG_BOOLEAN) {
956 /* Have to set obsolete flag */
957 off_t offset = DEVOFFSET (dev_current) +
958 offsetof (struct env_image_redundant, flags);
960 printf ("Setting obsolete flag in environment at 0x%lx on %s\n",
961 DEVOFFSET (dev_current), DEVNAME (dev_current));
963 flash_flag_obsolete (dev_current, fd_current, offset);
969 static int flash_read (int fd)
971 struct mtd_info_user mtdinfo;
974 rc = ioctl (fd, MEMGETINFO, &mtdinfo);
976 perror ("Cannot get MTD information");
980 if (mtdinfo.type != MTD_NORFLASH &&
981 mtdinfo.type != MTD_NANDFLASH &&
982 mtdinfo.type != MTD_DATAFLASH) {
983 fprintf (stderr, "Unsupported flash type %u\n", mtdinfo.type);
987 DEVTYPE(dev_current) = mtdinfo.type;
989 rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE,
990 DEVOFFSET (dev_current), mtdinfo.type);
992 return (rc != CUR_ENVSIZE) ? -1 : 0;
995 static int flash_io (int mode)
997 int fd_current, fd_target, rc, dev_target;
999 /* dev_current: fd_current, erase_current */
1000 fd_current = open (DEVNAME (dev_current), mode);
1001 if (fd_current < 0) {
1003 "Can't open %s: %s\n",
1004 DEVNAME (dev_current), strerror (errno));
1008 if (mode == O_RDWR) {
1009 if (HaveRedundEnv) {
1010 /* switch to next partition for writing */
1011 dev_target = !dev_current;
1012 /* dev_target: fd_target, erase_target */
1013 fd_target = open (DEVNAME (dev_target), mode);
1014 if (fd_target < 0) {
1016 "Can't open %s: %s\n",
1017 DEVNAME (dev_target),
1023 dev_target = dev_current;
1024 fd_target = fd_current;
1027 rc = flash_write (fd_current, fd_target, dev_target);
1029 if (HaveRedundEnv) {
1030 if (close (fd_target)) {
1032 "I/O error on %s: %s\n",
1033 DEVNAME (dev_target),
1039 rc = flash_read (fd_current);
1043 if (close (fd_current)) {
1045 "I/O error on %s: %s\n",
1046 DEVNAME (dev_current), strerror (errno));
1054 * s1 is either a simple 'name', or a 'name=value' pair.
1055 * s2 is a 'name=value' pair.
1056 * If the names match, return the value of s2, else NULL.
1059 static char *envmatch (char * s1, char * s2)
1061 if (s1 == NULL || s2 == NULL)
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 */