* (C) Copyright 2000-2008
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
+ * (C) Copyright 2008
+ * Guennadi Liakhovetski, DENX Software Engineering, lg@denx.de.
+ *
* See file CREDITS for list of people who contributed to this
* project.
*
#define CMD_GETENV "fw_printenv"
#define CMD_SETENV "fw_setenv"
-typedef struct envdev_s {
+#define min(x, y) ({ \
+ typeof(x) _min1 = (x); \
+ typeof(y) _min2 = (y); \
+ (void) (&_min1 == &_min2); \
+ _min1 < _min2 ? _min1 : _min2; })
+
+struct envdev_s {
char devname[16]; /* Device name */
ulong devoff; /* Device offset */
ulong env_size; /* environment size */
ulong erase_size; /* device erase size */
-} envdev_t;
+ ulong env_sectors; /* number of environment sectors */
+ uint8_t mtd_type; /* type of the MTD device */
+};
-static envdev_t envdevices[2];
-static int curdev;
+static struct envdev_s envdevices[2] =
+{
+ {
+ .mtd_type = MTD_ABSENT,
+ }, {
+ .mtd_type = MTD_ABSENT,
+ },
+};
+static int dev_current;
#define DEVNAME(i) envdevices[(i)].devname
#define DEVOFFSET(i) envdevices[(i)].devoff
#define ENVSIZE(i) envdevices[(i)].env_size
#define DEVESIZE(i) envdevices[(i)].erase_size
+#define ENVSECTORS(i) envdevices[(i)].env_sectors
+#define DEVTYPE(i) envdevices[(i)].mtd_type
-#define CFG_ENV_SIZE ENVSIZE(curdev)
+#define CFG_ENV_SIZE ENVSIZE(dev_current)
#define ENV_SIZE getenvsize()
-typedef struct environment_s {
- ulong crc; /* CRC32 over data bytes */
- unsigned char flags; /* active or obsolete */
- char *data;
-} env_t;
+struct env_image_single {
+ uint32_t crc; /* CRC32 over data bytes */
+ char data[];
+};
-static env_t environment;
+struct env_image_redundant {
+ uint32_t crc; /* CRC32 over data bytes */
+ unsigned char flags; /* active or obsolete */
+ char data[];
+};
+
+enum flag_scheme {
+ FLAG_NONE,
+ FLAG_BOOLEAN,
+ FLAG_INCREMENTAL,
+};
+
+struct environment {
+ void *image;
+ uint32_t *crc;
+ unsigned char *flags;
+ char *data;
+ enum flag_scheme flag_scheme;
+};
+
+static struct environment environment = {
+ .flag_scheme = FLAG_NONE,
+};
static int HaveRedundEnv = 0;
static unsigned char active_flag = 1;
+/* obsolete_flag must be 0 to efficiently set it on NOR flash without erasing */
static unsigned char obsolete_flag = 0;
#ifdef CONFIG_EXTRA_ENV_SETTINGS
CONFIG_EXTRA_ENV_SETTINGS
#endif
- "\0" /* Termimate env_t data with 2 NULs */
+ "\0" /* Termimate struct environment data with 2 NULs */
};
static int flash_io (int mode);
char *env, *nxt;
if (env_init ())
- return (NULL);
+ return NULL;
for (env = environment.data; *env; env = nxt + 1) {
char *val;
if (nxt >= &environment.data[ENV_SIZE]) {
fprintf (stderr, "## Error: "
"environment not terminated\n");
- return (NULL);
+ return NULL;
}
}
val = envmatch (name, env);
if (!val)
continue;
- return (val);
+ return val;
}
- return (NULL);
+ return NULL;
}
/*
int rc = 0;
if (env_init ())
- return (-1);
+ return -1;
if (argc == 1) { /* Print all env variables */
for (env = environment.data; *env; env = nxt + 1) {
if (nxt >= &environment.data[ENV_SIZE]) {
fprintf (stderr, "## Error: "
"environment not terminated\n");
- return (-1);
+ return -1;
}
}
printf ("%s\n", env);
}
- return (0);
+ return 0;
}
if (strcmp (argv[1], "-n") == 0) {
if (argc != 2) {
fprintf (stderr, "## Error: "
"`-n' option requires exactly one argument\n");
- return (-1);
+ return -1;
}
} else {
n_flag = 0;
if (nxt >= &environment.data[ENV_SIZE]) {
fprintf (stderr, "## Error: "
"environment not terminated\n");
- return (-1);
+ return -1;
}
}
val = envmatch (name, env);
}
}
- return (rc);
+ return rc;
}
/*
- * Deletes or sets environment variables. Returns errno style error codes:
+ * Deletes or sets environment variables. Returns -1 and sets errno error codes:
* 0 - OK
* EINVAL - need at least 1 argument
* EROFS - certain variables ("ethaddr", "serial#") cannot be
char *name;
if (argc < 2) {
- return (EINVAL);
+ errno = EINVAL;
+ return -1;
}
if (env_init ())
- return (errno);
+ return -1;
name = argv[1];
if (nxt >= &environment.data[ENV_SIZE]) {
fprintf (stderr, "## Error: "
"environment not terminated\n");
- return (EINVAL);
+ errno = EINVAL;
+ return -1;
}
}
if ((oldval = envmatch (name, env)) != NULL)
if ((strcmp (name, "ethaddr") == 0) ||
(strcmp (name, "serial#") == 0)) {
fprintf (stderr, "Can't overwrite \"%s\"\n", name);
- return (EROFS);
+ errno = EROFS;
+ return -1;
}
if (*++nxt == '\0') {
fprintf (stderr,
"Error: environment overflow, \"%s\" deleted\n",
name);
- return (-1);
+ return -1;
}
while ((*env = *name++) != '\0')
env++;
WRITE_FLASH:
- /* Update CRC */
- environment.crc = crc32 (0, (uint8_t*) environment.data, ENV_SIZE);
+ /*
+ * Update CRC
+ */
+ *environment.crc = crc32 (0, (uint8_t *) environment.data, ENV_SIZE);
/* write environment back to flash */
if (flash_io (O_RDWR)) {
fprintf (stderr, "Error: can't write fw_env to flash\n");
- return (-1);
+ return -1;
}
- return (0);
+ return 0;
}
-static int flash_io (int mode)
+/*
+ * Test for bad block on NAND, just returns 0 on NOR, on NAND:
+ * 0 - block is good
+ * > 0 - block is bad
+ * < 0 - failed to test
+ */
+static int flash_bad_block (int fd, uint8_t mtd_type, loff_t *blockstart)
{
- int fd, fdr, rc, otherdev, len, resid;
- struct erase_info_user erase;
- char *data = NULL;
+ if (mtd_type == MTD_NANDFLASH) {
+ int badblock = ioctl (fd, MEMGETBADBLOCK, blockstart);
- if ((fd = open (DEVNAME (curdev), mode)) < 0) {
- fprintf (stderr,
- "Can't open %s: %s\n",
- DEVNAME (curdev), strerror (errno));
- return (-1);
+ if (badblock < 0) {
+ perror ("Cannot read bad block mark");
+ return badblock;
+ }
+
+ if (badblock) {
+#ifdef DEBUG
+ fprintf (stderr, "Bad block at 0x%llx, "
+ "skipping\n", *blockstart);
+#endif
+ return badblock;
+ }
}
- len = sizeof (environment.crc);
- if (HaveRedundEnv) {
- len += sizeof (environment.flags);
+ return 0;
+}
+
+/*
+ * Read data from flash at an offset into a provided buffer. On NAND it skips
+ * bad blocks but makes sure it stays within ENVSECTORS (dev) starting from
+ * the DEVOFFSET (dev) block. On NOR the loop is only run once.
+ */
+static int flash_read_buf (int dev, int fd, void *buf, size_t count,
+ off_t offset, uint8_t mtd_type)
+{
+ size_t blocklen; /* erase / write length - one block on NAND,
+ 0 on NOR */
+ size_t processed = 0; /* progress counter */
+ size_t readlen = count; /* current read length */
+ off_t top_of_range; /* end of the last block we may use */
+ off_t block_seek; /* offset inside the current block to the start
+ of the data */
+ loff_t blockstart; /* running start of the current block -
+ MEMGETBADBLOCK needs 64 bits */
+ int rc;
+
+ /*
+ * Start of the first block to be read, relies on the fact, that
+ * erase sector size is always a power of 2
+ */
+ blockstart = offset & ~(DEVESIZE (dev) - 1);
+
+ /* Offset inside a block */
+ block_seek = offset - blockstart;
+
+ if (mtd_type == MTD_NANDFLASH) {
+ /*
+ * NAND: calculate which blocks we are reading. We have
+ * to read one block at a time to skip bad blocks.
+ */
+ blocklen = DEVESIZE (dev);
+
+ /*
+ * To calculate the top of the range, we have to use the
+ * global DEVOFFSET (dev), which can be different from offset
+ */
+ top_of_range = (DEVOFFSET (dev) & ~(blocklen - 1)) +
+ ENVSECTORS (dev) * blocklen;
+
+ /* Limit to one block for the first read */
+ if (readlen > blocklen - block_seek)
+ readlen = blocklen - block_seek;
+ } else {
+ blocklen = 0;
+ top_of_range = offset + count;
}
- if (mode == O_RDWR) {
- if (HaveRedundEnv) {
- /* switch to next partition for writing */
- otherdev = !curdev;
- if ((fdr = open (DEVNAME (otherdev), mode)) < 0) {
- fprintf (stderr,
- "Can't open %s: %s\n",
- DEVNAME (otherdev),
- strerror (errno));
- return (-1);
- }
- } else {
- otherdev = curdev;
- fdr = fd;
- }
- printf ("Unlocking flash...\n");
- erase.length = DEVESIZE (otherdev);
- erase.start = DEVOFFSET (otherdev);
- ioctl (fdr, MEMUNLOCK, &erase);
+ /* This only runs once on NOR flash */
+ while (processed < count) {
+ rc = flash_bad_block (fd, mtd_type, &blockstart);
+ if (rc < 0) /* block test failed */
+ return -1;
- if (HaveRedundEnv) {
- erase.length = DEVESIZE (curdev);
- erase.start = DEVOFFSET (curdev);
- ioctl (fd, MEMUNLOCK, &erase);
- environment.flags = active_flag;
+ if (blockstart + block_seek + readlen > top_of_range) {
+ /* End of range is reached */
+ fprintf (stderr,
+ "Too few good blocks within range\n");
+ return -1;
}
- printf ("Done\n");
- resid = DEVESIZE (otherdev) - CFG_ENV_SIZE;
- if (resid) {
- if ((data = malloc (resid)) == NULL) {
- fprintf (stderr,
- "Cannot malloc %d bytes: %s\n",
- resid,
- strerror (errno));
- return (-1);
- }
- if (lseek (fdr, DEVOFFSET (otherdev) + CFG_ENV_SIZE, SEEK_SET)
- == -1) {
- fprintf (stderr, "seek error on %s: %s\n",
- DEVNAME (otherdev),
- strerror (errno));
- return (-1);
- }
- if ((rc = read (fdr, data, resid)) != resid) {
- fprintf (stderr,
- "read error on %s: %s\n",
- DEVNAME (otherdev),
- strerror (errno));
- return (-1);
- }
+ if (rc) { /* block is bad */
+ blockstart += blocklen;
+ continue;
}
- printf ("Erasing old environment...\n");
+ /*
+ * If a block is bad, we retry in the next block at the same
+ * offset - see common/env_nand.c::writeenv()
+ */
+ lseek (fd, blockstart + block_seek, SEEK_SET);
- erase.length = DEVESIZE (otherdev);
- erase.start = DEVOFFSET (otherdev);
- if (ioctl (fdr, MEMERASE, &erase) != 0) {
- fprintf (stderr, "MTD erase error on %s: %s\n",
- DEVNAME (otherdev),
- strerror (errno));
- return (-1);
+ rc = read (fd, buf + processed, readlen);
+ if (rc != readlen) {
+ fprintf (stderr, "Read error on %s: %s\n",
+ DEVNAME (dev), strerror (errno));
+ return -1;
}
+#ifdef DEBUG
+ fprintf (stderr, "Read 0x%x bytes at 0x%llx\n",
+ rc, blockstart + block_seek);
+#endif
+ processed += readlen;
+ readlen = min (blocklen, count - processed);
+ block_seek = 0;
+ blockstart += blocklen;
+ }
+
+ return processed;
+}
+
+/*
+ * Write count bytes at offset, but stay within ENVSETCORS (dev) sectors of
+ * DEVOFFSET (dev). Similar to the read case above, on NOR we erase and write
+ * the whole data at once.
+ */
+static int flash_write_buf (int dev, int fd, void *buf, size_t count,
+ off_t offset, uint8_t mtd_type)
+{
+ void *data;
+ struct erase_info_user erase;
+ size_t blocklen; /* length of NAND block / NOR erase sector */
+ size_t erase_len; /* whole area that can be erased - may include
+ bad blocks */
+ size_t erasesize; /* erase / write length - one block on NAND,
+ whole area on NOR */
+ size_t processed = 0; /* progress counter */
+ size_t write_total; /* total size to actually write - excludinig
+ bad blocks */
+ off_t erase_offset; /* offset to the first erase block (aligned)
+ below offset */
+ off_t block_seek; /* offset inside the erase block to the start
+ of the data */
+ off_t top_of_range; /* end of the last block we may use */
+ loff_t blockstart; /* running start of the current block -
+ MEMGETBADBLOCK needs 64 bits */
+ int rc;
+
+ blocklen = DEVESIZE (dev);
+
+ /* Erase sector size is always a power of 2 */
+ top_of_range = (DEVOFFSET (dev) & ~(blocklen - 1)) +
+ ENVSECTORS (dev) * blocklen;
- printf ("Done\n");
+ erase_offset = offset & ~(blocklen - 1);
- printf ("Writing environment to %s...\n", DEVNAME (otherdev));
- if (lseek (fdr, DEVOFFSET (otherdev), SEEK_SET) == -1) {
+ /* Maximum area we may use */
+ erase_len = top_of_range - erase_offset;
+
+ blockstart = erase_offset;
+ /* Offset inside a block */
+ block_seek = offset - erase_offset;
+
+ /*
+ * Data size we actually have to write: from the start of the block
+ * to the start of the data, then count bytes of data, and to the
+ * end of the block
+ */
+ write_total = (block_seek + count + blocklen - 1) & ~(blocklen - 1);
+
+ /*
+ * Support data anywhere within erase sectors: read out the complete
+ * area to be erased, replace the environment image, write the whole
+ * block back again.
+ */
+ if (write_total > count) {
+ data = malloc (erase_len);
+ if (!data) {
fprintf (stderr,
- "seek error on %s: %s\n",
- DEVNAME (otherdev), strerror (errno));
- return (-1);
+ "Cannot malloc %u bytes: %s\n",
+ erase_len, strerror (errno));
+ return -1;
}
- if (write (fdr, &environment, len) != len) {
- fprintf (stderr,
- "CRC write error on %s: %s\n",
- DEVNAME (otherdev), strerror (errno));
- return (-1);
+
+ rc = flash_read_buf (dev, fd, data, write_total, erase_offset,
+ mtd_type);
+ if (write_total != rc)
+ return -1;
+
+ /* Overwrite the old environment */
+ memcpy (data + block_seek, buf, count);
+ } else {
+ /*
+ * We get here, iff offset is block-aligned and count is a
+ * multiple of blocklen - see write_total calculation above
+ */
+ data = buf;
+ }
+
+ if (mtd_type == MTD_NANDFLASH) {
+ /*
+ * NAND: calculate which blocks we are writing. We have
+ * to write one block at a time to skip bad blocks.
+ */
+ erasesize = blocklen;
+ } else {
+ erasesize = erase_len;
+ }
+
+ erase.length = erasesize;
+
+ /* This only runs once on NOR flash */
+ while (processed < write_total) {
+ rc = flash_bad_block (fd, mtd_type, &blockstart);
+ if (rc < 0) /* block test failed */
+ return rc;
+
+ if (blockstart + erasesize > top_of_range) {
+ fprintf (stderr, "End of range reached, aborting\n");
+ return -1;
}
- if (write (fdr, environment.data, ENV_SIZE) != ENV_SIZE) {
+
+ if (rc) { /* block is bad */
+ blockstart += blocklen;
+ continue;
+ }
+
+ erase.start = blockstart;
+ ioctl (fd, MEMUNLOCK, &erase);
+
+ if (ioctl (fd, MEMERASE, &erase) != 0) {
+ fprintf (stderr, "MTD erase error on %s: %s\n",
+ DEVNAME (dev),
+ strerror (errno));
+ return -1;
+ }
+
+ if (lseek (fd, blockstart, SEEK_SET) == -1) {
fprintf (stderr,
- "Write error on %s: %s\n",
- DEVNAME (otherdev), strerror (errno));
- return (-1);
+ "Seek error on %s: %s\n",
+ DEVNAME (dev), strerror (errno));
+ return -1;
}
- if (resid) {
- if (write (fdr, data, resid) != resid) {
- fprintf (stderr,
- "write error on %s: %s\n",
- DEVNAME (curdev), strerror (errno));
- return (-1);
- }
- free (data);
+
+#ifdef DEBUG
+ printf ("Write 0x%x bytes at 0x%llx\n", erasesize, blockstart);
+#endif
+ if (write (fd, data + processed, erasesize) != erasesize) {
+ fprintf (stderr, "Write error on %s: %s\n",
+ DEVNAME (dev), strerror (errno));
+ return -1;
}
+
+ ioctl (fd, MEMLOCK, &erase);
+
+ processed += blocklen;
+ block_seek = 0;
+ blockstart += blocklen;
+ }
+
+ if (write_total > count)
+ free (data);
+
+ return processed;
+}
+
+/*
+ * Set obsolete flag at offset - NOR flash only
+ */
+static int flash_flag_obsolete (int dev, int fd, off_t offset)
+{
+ int rc;
+
+ /* This relies on the fact, that obsolete_flag == 0 */
+ rc = lseek (fd, offset, SEEK_SET);
+ if (rc < 0) {
+ fprintf (stderr, "Cannot seek to set the flag on %s \n",
+ DEVNAME (dev));
+ return rc;
+ }
+ rc = write (fd, &obsolete_flag, sizeof (obsolete_flag));
+ if (rc < 0)
+ perror ("Could not set obsolete flag");
+
+ return rc;
+}
+
+static int flash_write (int fd_current, int fd_target, int dev_target)
+{
+ int rc;
+
+ switch (environment.flag_scheme) {
+ case FLAG_NONE:
+ break;
+ case FLAG_INCREMENTAL:
+ (*environment.flags)++;
+ break;
+ case FLAG_BOOLEAN:
+ *environment.flags = active_flag;
+ break;
+ default:
+ fprintf (stderr, "Unimplemented flash scheme %u \n",
+ environment.flag_scheme);
+ return -1;
+ }
+
+#ifdef DEBUG
+ printf ("Writing new environment at 0x%lx on %s\n",
+ DEVOFFSET (dev_target), DEVNAME (dev_target));
+#endif
+ rc = flash_write_buf (dev_target, fd_target, environment.image,
+ CFG_ENV_SIZE, DEVOFFSET (dev_target),
+ DEVTYPE(dev_target));
+ if (rc < 0)
+ return rc;
+
+ if (environment.flag_scheme == FLAG_BOOLEAN) {
+ /* Have to set obsolete flag */
+ off_t offset = DEVOFFSET (dev_current) +
+ offsetof (struct env_image_redundant, flags);
+#ifdef DEBUG
+ printf ("Setting obsolete flag in environment at 0x%lx on %s\n",
+ DEVOFFSET (dev_current), DEVNAME (dev_current));
+#endif
+ flash_flag_obsolete (dev_current, fd_current, offset);
+ }
+
+ return 0;
+}
+
+static int flash_read (int fd)
+{
+ struct mtd_info_user mtdinfo;
+ int rc;
+
+ rc = ioctl (fd, MEMGETINFO, &mtdinfo);
+ if (rc < 0) {
+ perror ("Cannot get MTD information");
+ return -1;
+ }
+
+ if (mtdinfo.type != MTD_NORFLASH && mtdinfo.type != MTD_NANDFLASH) {
+ fprintf (stderr, "Unsupported flash type %u\n", mtdinfo.type);
+ return -1;
+ }
+
+ DEVTYPE(dev_current) = mtdinfo.type;
+
+ rc = flash_read_buf (dev_current, fd, environment.image, CFG_ENV_SIZE,
+ DEVOFFSET (dev_current), mtdinfo.type);
+
+ return (rc != CFG_ENV_SIZE) ? -1 : 0;
+}
+
+static int flash_io (int mode)
+{
+ int fd_current, fd_target, rc, dev_target;
+
+ /* dev_current: fd_current, erase_current */
+ fd_current = open (DEVNAME (dev_current), mode);
+ if (fd_current < 0) {
+ fprintf (stderr,
+ "Can't open %s: %s\n",
+ DEVNAME (dev_current), strerror (errno));
+ return -1;
+ }
+
+ if (mode == O_RDWR) {
if (HaveRedundEnv) {
- /* change flag on current active env partition */
- if (lseek (fd, DEVOFFSET (curdev) + sizeof (ulong), SEEK_SET)
- == -1) {
- fprintf (stderr, "seek error on %s: %s\n",
- DEVNAME (curdev), strerror (errno));
- return (-1);
- }
- if (write (fd, &obsolete_flag, sizeof (obsolete_flag)) !=
- sizeof (obsolete_flag)) {
+ /* switch to next partition for writing */
+ dev_target = !dev_current;
+ /* dev_target: fd_target, erase_target */
+ fd_target = open (DEVNAME (dev_target), mode);
+ if (fd_target < 0) {
fprintf (stderr,
- "Write error on %s: %s\n",
- DEVNAME (curdev), strerror (errno));
- return (-1);
+ "Can't open %s: %s\n",
+ DEVNAME (dev_target),
+ strerror (errno));
+ rc = -1;
+ goto exit;
}
+ } else {
+ dev_target = dev_current;
+ fd_target = fd_current;
}
- printf ("Done\n");
- printf ("Locking ...\n");
- erase.length = DEVESIZE (otherdev);
- erase.start = DEVOFFSET (otherdev);
- ioctl (fdr, MEMLOCK, &erase);
+
+ rc = flash_write (fd_current, fd_target, dev_target);
+
if (HaveRedundEnv) {
- erase.length = DEVESIZE (curdev);
- erase.start = DEVOFFSET (curdev);
- ioctl (fd, MEMLOCK, &erase);
- if (close (fdr)) {
+ if (close (fd_target)) {
fprintf (stderr,
"I/O error on %s: %s\n",
- DEVNAME (otherdev),
+ DEVNAME (dev_target),
strerror (errno));
- return (-1);
+ rc = -1;
}
}
- printf ("Done\n");
} else {
-
- if (lseek (fd, DEVOFFSET (curdev), SEEK_SET) == -1) {
- fprintf (stderr,
- "seek error on %s: %s\n",
- DEVNAME (curdev), strerror (errno));
- return (-1);
- }
- if (read (fd, &environment, len) != len) {
- fprintf (stderr,
- "CRC read error on %s: %s\n",
- DEVNAME (curdev), strerror (errno));
- return (-1);
- }
- if ((rc = read (fd, environment.data, ENV_SIZE)) != ENV_SIZE) {
- fprintf (stderr,
- "Read error on %s: %s\n",
- DEVNAME (curdev), strerror (errno));
- return (-1);
- }
+ rc = flash_read (fd_current);
}
- if (close (fd)) {
+exit:
+ if (close (fd_current)) {
fprintf (stderr,
- "I/O error on %s: %s\n",
- DEVNAME (curdev), strerror (errno));
- return (-1);
+ "I/O error on %s: %s\n",
+ DEVNAME (dev_current), strerror (errno));
+ return -1;
}
- /* everything ok */
- return (0);
+ return rc;
}
/*
while (*s1 == *s2++)
if (*s1++ == '=')
- return (s2);
+ return s2;
if (*s1 == '\0' && *(s2 - 1) == '=')
- return (s2);
- return (NULL);
+ return s2;
+ return NULL;
}
/*
*/
static int env_init (void)
{
+ int crc0, crc0_ok;
+ char flag0;
+ void *addr0;
+
int crc1, crc1_ok;
- char *addr1;
+ char flag1;
+ void *addr1;
- int crc2, crc2_ok;
- char flag1, flag2, *addr2;
+ struct env_image_single *single;
+ struct env_image_redundant *redundant;
if (parse_config ()) /* should fill envdevices */
- return 1;
+ return -1;
- if ((addr1 = calloc (1, ENV_SIZE)) == NULL) {
+ addr0 = calloc (1, CFG_ENV_SIZE);
+ if (addr0 == NULL) {
fprintf (stderr,
"Not enough memory for environment (%ld bytes)\n",
- ENV_SIZE);
- return (errno);
+ CFG_ENV_SIZE);
+ return -1;
}
/* read environment from FLASH to local buffer */
- environment.data = addr1;
- curdev = 0;
- if (flash_io (O_RDONLY)) {
- return (errno);
+ environment.image = addr0;
+
+ if (HaveRedundEnv) {
+ redundant = addr0;
+ environment.crc = &redundant->crc;
+ environment.flags = &redundant->flags;
+ environment.data = redundant->data;
+ } else {
+ single = addr0;
+ environment.crc = &single->crc;
+ environment.flags = NULL;
+ environment.data = single->data;
}
- crc1_ok = ((crc1 = crc32 (0, (uint8_t *) environment.data, ENV_SIZE))
- == environment.crc);
+ dev_current = 0;
+ if (flash_io (O_RDONLY))
+ return -1;
+
+ crc0 = crc32 (0, (uint8_t *) environment.data, ENV_SIZE);
+ crc0_ok = (crc0 == *environment.crc);
if (!HaveRedundEnv) {
- if (!crc1_ok) {
+ if (!crc0_ok) {
fprintf (stderr,
"Warning: Bad CRC, using default environment\n");
memcpy(environment.data, default_environment, sizeof default_environment);
}
} else {
- flag1 = environment.flags;
+ flag0 = *environment.flags;
- curdev = 1;
- if ((addr2 = calloc (1, ENV_SIZE)) == NULL) {
+ dev_current = 1;
+ addr1 = calloc (1, CFG_ENV_SIZE);
+ if (addr1 == NULL) {
fprintf (stderr,
"Not enough memory for environment (%ld bytes)\n",
- ENV_SIZE);
- return (errno);
+ CFG_ENV_SIZE);
+ return -1;
}
- environment.data = addr2;
+ redundant = addr1;
- if (flash_io (O_RDONLY)) {
- return (errno);
+ /*
+ * have to set environment.image for flash_read(), careful -
+ * other pointers in environment still point inside addr0
+ */
+ environment.image = addr1;
+ if (flash_io (O_RDONLY))
+ return -1;
+
+ /* Check flag scheme compatibility */
+ if (DEVTYPE(dev_current) == MTD_NORFLASH &&
+ DEVTYPE(!dev_current) == MTD_NORFLASH) {
+ environment.flag_scheme = FLAG_BOOLEAN;
+ } else if (DEVTYPE(dev_current) == MTD_NANDFLASH &&
+ DEVTYPE(!dev_current) == MTD_NANDFLASH) {
+ environment.flag_scheme = FLAG_INCREMENTAL;
+ } else {
+ fprintf (stderr, "Incompatible flash types!\n");
+ return -1;
}
- crc2_ok = ((crc2 = crc32 (0, (uint8_t *) environment.data, ENV_SIZE))
- == environment.crc);
- flag2 = environment.flags;
-
- if (crc1_ok && !crc2_ok) {
- environment.data = addr1;
- environment.flags = flag1;
- environment.crc = crc1;
- curdev = 0;
- free (addr2);
- } else if (!crc1_ok && crc2_ok) {
- environment.data = addr2;
- environment.flags = flag2;
- environment.crc = crc2;
- curdev = 1;
- free (addr1);
- } else if (!crc1_ok && !crc2_ok) {
+ crc1 = crc32 (0, (uint8_t *) redundant->data, ENV_SIZE);
+ crc1_ok = (crc1 == redundant->crc);
+ flag1 = redundant->flags;
+
+ if (crc0_ok && !crc1_ok) {
+ dev_current = 0;
+ } else if (!crc0_ok && crc1_ok) {
+ dev_current = 1;
+ } else if (!crc0_ok && !crc1_ok) {
fprintf (stderr,
"Warning: Bad CRC, using default environment\n");
- memcpy(environment.data, default_environment, sizeof default_environment);
- curdev = 0;
- free (addr1);
- } else if (flag1 == active_flag && flag2 == obsolete_flag) {
- environment.data = addr1;
- environment.flags = flag1;
- environment.crc = crc1;
- curdev = 0;
- free (addr2);
- } else if (flag1 == obsolete_flag && flag2 == active_flag) {
- environment.data = addr2;
- environment.flags = flag2;
- environment.crc = crc2;
- curdev = 1;
- free (addr1);
- } else if (flag1 == flag2) {
- environment.data = addr1;
- environment.flags = flag1;
- environment.crc = crc1;
- curdev = 0;
- free (addr2);
- } else if (flag1 == 0xFF) {
- environment.data = addr1;
- environment.flags = flag1;
- environment.crc = crc1;
- curdev = 0;
- free (addr2);
- } else if (flag2 == 0xFF) {
- environment.data = addr2;
- environment.flags = flag2;
- environment.crc = crc2;
- curdev = 1;
+ memcpy (environment.data, default_environment,
+ sizeof default_environment);
+ dev_current = 0;
+ } else {
+ switch (environment.flag_scheme) {
+ case FLAG_BOOLEAN:
+ if (flag0 == active_flag &&
+ flag1 == obsolete_flag) {
+ dev_current = 0;
+ } else if (flag0 == obsolete_flag &&
+ flag1 == active_flag) {
+ dev_current = 1;
+ } else if (flag0 == flag1) {
+ dev_current = 0;
+ } else if (flag0 == 0xFF) {
+ dev_current = 0;
+ } else if (flag1 == 0xFF) {
+ dev_current = 1;
+ } else {
+ dev_current = 0;
+ }
+ break;
+ case FLAG_INCREMENTAL:
+ if ((flag0 == 255 && flag1 == 0) ||
+ flag1 > flag0)
+ dev_current = 1;
+ else if ((flag1 == 255 && flag0 == 0) ||
+ flag0 > flag1)
+ dev_current = 0;
+ else /* flags are equal - almost impossible */
+ dev_current = 0;
+ break;
+ default:
+ fprintf (stderr, "Unknown flag scheme %u \n",
+ environment.flag_scheme);
+ return -1;
+ }
+ }
+
+ /*
+ * If we are reading, we don't need the flag and the CRC any
+ * more, if we are writing, we will re-calculate CRC and update
+ * flags before writing out
+ */
+ if (dev_current) {
+ environment.image = addr1;
+ environment.crc = &redundant->crc;
+ environment.flags = &redundant->flags;
+ environment.data = redundant->data;
+ free (addr0);
+ } else {
+ environment.image = addr0;
+ /* Other pointers are already set */
free (addr1);
}
}
- return (0);
+ return 0;
}
if (get_config (CONFIG_FILE)) {
fprintf (stderr,
"Cannot parse config file: %s\n", strerror (errno));
- return 1;
+ return -1;
}
#else
strcpy (DEVNAME (0), DEVICE1_NAME);
DEVOFFSET (0) = DEVICE1_OFFSET;
ENVSIZE (0) = ENV1_SIZE;
DEVESIZE (0) = DEVICE1_ESIZE;
+ ENVSECTORS (0) = DEVICE1_ENVSECTORS;
#ifdef HAVE_REDUND
strcpy (DEVNAME (1), DEVICE2_NAME);
DEVOFFSET (1) = DEVICE2_OFFSET;
ENVSIZE (1) = ENV2_SIZE;
DEVESIZE (1) = DEVICE2_ESIZE;
+ ENVSECTORS (1) = DEVICE2_ENVSECTORS;
HaveRedundEnv = 1;
#endif
#endif
fprintf (stderr,
"Cannot access MTD device %s: %s\n",
DEVNAME (0), strerror (errno));
- return 1;
+ return -1;
}
if (HaveRedundEnv && stat (DEVNAME (1), &st)) {
fprintf (stderr,
"Cannot access MTD device %s: %s\n",
DEVNAME (1), strerror (errno));
- return 1;
+ return -1;
}
return 0;
}
int rc;
char dump[128];
- if ((fp = fopen (fname, "r")) == NULL) {
- return 1;
- }
-
- while ((i < 2) && ((rc = fscanf (fp, "%s %lx %lx %lx",
- DEVNAME (i),
- &DEVOFFSET (i),
- &ENVSIZE (i),
- &DEVESIZE (i) )) != EOF)) {
+ fp = fopen (fname, "r");
+ if (fp == NULL)
+ return -1;
+ while (i < 2 && fgets (dump, sizeof (dump), fp)) {
/* Skip incomplete conversions and comment strings */
- if ((rc < 3) || (*DEVNAME (i) == '#')) {
- fgets (dump, sizeof (dump), fp); /* Consume till end */
+ if (dump[0] == '#')
continue;
- }
+
+ rc = sscanf (dump, "%s %lx %lx %lx %lx",
+ DEVNAME (i),
+ &DEVOFFSET (i),
+ &ENVSIZE (i),
+ &DEVESIZE (i),
+ &ENVSECTORS (i));
+
+ if (rc < 4)
+ continue;
+
+ if (rc < 5)
+ /* Default - 1 sector */
+ ENVSECTORS (i) = 1;
i++;
}
HaveRedundEnv = i - 1;
if (!i) { /* No valid entries found */
errno = EINVAL;
- return 1;
+ return -1;
} else
return 0;
}
projects / u-boot / commitdiff