ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/uboot/tools/env/fw_env.c b/marvell/uboot/tools/env/fw_env.c
new file mode 100644
index 0000000..577ce2d
--- /dev/null
+++ b/marvell/uboot/tools/env/fw_env.c
@@ -0,0 +1,1337 @@
+/*
+ * (C) Copyright 2000-2010
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2008
+ * Guennadi Liakhovetski, DENX Software Engineering, lg@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <errno.h>
+#include <env_flags.h>
+#include <fcntl.h>
+#include <linux/stringify.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#ifdef MTD_OLD
+# include <stdint.h>
+# include <linux/mtd/mtd.h>
+#else
+# define __user /* nothing */
+# include <mtd/mtd-user.h>
+#endif
+
+#include "fw_env.h"
+
+#define WHITESPACE(c) ((c == '\t') || (c == ' '))
+
+#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 */
+ ulong env_sectors; /* number of environment sectors */
+ uint8_t mtd_type; /* type of the MTD device */
+};
+
+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 CUR_ENVSIZE ENVSIZE(dev_current)
+
+#define ENV_SIZE getenvsize()
+
+struct env_image_single {
+ uint32_t crc; /* CRC32 over data bytes */
+ char data[];
+};
+
+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;
+
+#define DEFAULT_ENV_INSTANCE_STATIC
+#include <env_default.h>
+
+static int flash_io (int mode);
+static char *envmatch (char * s1, char * s2);
+static int parse_config (void);
+
+#if defined(CONFIG_FILE)
+static int get_config (char *);
+#endif
+static inline ulong getenvsize (void)
+{
+ ulong rc = CUR_ENVSIZE - sizeof(long);
+
+ if (HaveRedundEnv)
+ rc -= sizeof (char);
+ return rc;
+}
+
+static char *fw_string_blank(char *s, int noblank)
+{
+ int i;
+ int len = strlen(s);
+
+ for (i = 0; i < len; i++, s++) {
+ if ((noblank && !WHITESPACE(*s)) ||
+ (!noblank && WHITESPACE(*s)))
+ break;
+ }
+ if (i == len)
+ return NULL;
+
+ return s;
+}
+
+/*
+ * Search the environment for a variable.
+ * Return the value, if found, or NULL, if not found.
+ */
+char *fw_getenv (char *name)
+{
+ char *env, *nxt;
+
+ for (env = environment.data; *env; env = nxt + 1) {
+ char *val;
+
+ for (nxt = env; *nxt; ++nxt) {
+ if (nxt >= &environment.data[ENV_SIZE]) {
+ fprintf (stderr, "## Error: "
+ "environment not terminated\n");
+ return NULL;
+ }
+ }
+ val = envmatch (name, env);
+ if (!val)
+ continue;
+ return val;
+ }
+ return NULL;
+}
+
+/*
+ * Search the default environment for a variable.
+ * Return the value, if found, or NULL, if not found.
+ */
+char *fw_getdefenv(char *name)
+{
+ char *env, *nxt;
+
+ for (env = default_environment; *env; env = nxt + 1) {
+ char *val;
+
+ for (nxt = env; *nxt; ++nxt) {
+ if (nxt >= &default_environment[ENV_SIZE]) {
+ fprintf(stderr, "## Error: "
+ "default environment not terminated\n");
+ return NULL;
+ }
+ }
+ val = envmatch(name, env);
+ if (!val)
+ continue;
+ return val;
+ }
+ return NULL;
+}
+
+/*
+ * Print the current definition of one, or more, or all
+ * environment variables
+ */
+int fw_printenv (int argc, char *argv[])
+{
+ char *env, *nxt;
+ int i, n_flag;
+ int rc = 0;
+
+ if (fw_env_open())
+ return -1;
+
+ if (argc == 1) { /* Print all env variables */
+ for (env = environment.data; *env; env = nxt + 1) {
+ for (nxt = env; *nxt; ++nxt) {
+ if (nxt >= &environment.data[ENV_SIZE]) {
+ fprintf (stderr, "## Error: "
+ "environment not terminated\n");
+ return -1;
+ }
+ }
+
+ printf ("%s\n", env);
+ }
+ return 0;
+ }
+
+ if (strcmp (argv[1], "-n") == 0) {
+ n_flag = 1;
+ ++argv;
+ --argc;
+ if (argc != 2) {
+ fprintf (stderr, "## Error: "
+ "`-n' option requires exactly one argument\n");
+ return -1;
+ }
+ } else {
+ n_flag = 0;
+ }
+
+ for (i = 1; i < argc; ++i) { /* print single env variables */
+ char *name = argv[i];
+ char *val = NULL;
+
+ for (env = environment.data; *env; env = nxt + 1) {
+
+ for (nxt = env; *nxt; ++nxt) {
+ if (nxt >= &environment.data[ENV_SIZE]) {
+ fprintf (stderr, "## Error: "
+ "environment not terminated\n");
+ return -1;
+ }
+ }
+ val = envmatch (name, env);
+ if (val) {
+ if (!n_flag) {
+ fputs (name, stdout);
+ putc ('=', stdout);
+ }
+ puts (val);
+ break;
+ }
+ }
+ if (!val) {
+ fprintf (stderr, "## Error: \"%s\" not defined\n", name);
+ rc = -1;
+ }
+ }
+
+ return rc;
+}
+
+int fw_env_close(void)
+{
+ /*
+ * 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 0;
+}
+
+
+/*
+ * Set/Clear a single variable in the environment.
+ * This is called in sequence to update the environment
+ * in RAM without updating the copy in flash after each set
+ */
+int fw_env_write(char *name, char *value)
+{
+ int len;
+ char *env, *nxt;
+ char *oldval = NULL;
+ int deleting, creating, overwriting;
+
+ /*
+ * search if variable with this name already exists
+ */
+ for (nxt = env = environment.data; *env; env = nxt + 1) {
+ for (nxt = env; *nxt; ++nxt) {
+ if (nxt >= &environment.data[ENV_SIZE]) {
+ fprintf(stderr, "## Error: "
+ "environment not terminated\n");
+ errno = EINVAL;
+ return -1;
+ }
+ }
+ if ((oldval = envmatch (name, env)) != NULL)
+ break;
+ }
+
+ deleting = (oldval && !(value && strlen(value)));
+ creating = (!oldval && (value && strlen(value)));
+ overwriting = (oldval && (value && strlen(value)));
+
+ /* check for permission */
+ if (deleting) {
+ if (env_flags_validate_varaccess(name,
+ ENV_FLAGS_VARACCESS_PREVENT_DELETE)) {
+ printf("Can't delete \"%s\"\n", name);
+ errno = EROFS;
+ return -1;
+ }
+ } else if (overwriting) {
+ if (env_flags_validate_varaccess(name,
+ ENV_FLAGS_VARACCESS_PREVENT_OVERWR)) {
+ printf("Can't overwrite \"%s\"\n", name);
+ errno = EROFS;
+ return -1;
+ } else if (env_flags_validate_varaccess(name,
+ ENV_FLAGS_VARACCESS_PREVENT_NONDEF_OVERWR)) {
+ const char *defval = fw_getdefenv(name);
+
+ if (defval == NULL)
+ defval = "";
+ if (strcmp(oldval, defval)
+ != 0) {
+ printf("Can't overwrite \"%s\"\n", name);
+ errno = EROFS;
+ return -1;
+ }
+ }
+ } else if (creating) {
+ if (env_flags_validate_varaccess(name,
+ ENV_FLAGS_VARACCESS_PREVENT_CREATE)) {
+ printf("Can't create \"%s\"\n", name);
+ errno = EROFS;
+ return -1;
+ }
+ } else
+ /* Nothing to do */
+ return 0;
+
+ if (deleting || overwriting) {
+ if (*++nxt == '\0') {
+ *env = '\0';
+ } else {
+ for (;;) {
+ *env = *nxt++;
+ if ((*env == '\0') && (*nxt == '\0'))
+ break;
+ ++env;
+ }
+ }
+ *++env = '\0';
+ }
+
+ /* Delete only ? */
+ if (!value || !strlen(value))
+ return 0;
+
+ /*
+ * Append new definition at the end
+ */
+ for (env = environment.data; *env || *(env + 1); ++env);
+ if (env > environment.data)
+ ++env;
+ /*
+ * Overflow when:
+ * "name" + "=" + "val" +"\0\0" > CUR_ENVSIZE - (env-environment)
+ */
+ len = strlen (name) + 2;
+ /* add '=' for first arg, ' ' for all others */
+ len += strlen(value) + 1;
+
+ if (len > (&environment.data[ENV_SIZE] - env)) {
+ fprintf (stderr,
+ "Error: environment overflow, \"%s\" deleted\n",
+ name);
+ return -1;
+ }
+
+ while ((*env = *name++) != '\0')
+ env++;
+ *env = '=';
+ while ((*++env = *value++) != '\0')
+ ;
+
+ /* end is marked with double '\0' */
+ *++env = '\0';
+
+ return 0;
+}
+
+/*
+ * 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
+ * modified or deleted
+ *
+ */
+int fw_setenv(int argc, char *argv[])
+{
+ int i;
+ size_t len;
+ char *name;
+ char *value = NULL;
+
+ if (argc < 2) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (fw_env_open()) {
+ fprintf(stderr, "Error: environment not initialized\n");
+ return -1;
+ }
+
+ name = argv[1];
+
+ if (env_flags_validate_env_set_params(argc, argv) < 0)
+ return 1;
+
+ len = 0;
+ for (i = 2; i < argc; ++i) {
+ char *val = argv[i];
+ size_t val_len = strlen(val);
+
+ if (value)
+ value[len - 1] = ' ';
+ value = realloc(value, len + val_len + 1);
+ if (!value) {
+ fprintf(stderr,
+ "Cannot malloc %zu bytes: %s\n",
+ len, strerror(errno));
+ return -1;
+ }
+
+ memcpy(value + len, val, val_len);
+ len += val_len;
+ value[len++] = '\0';
+ }
+
+ fw_env_write(name, value);
+
+ free(value);
+
+ return fw_env_close();
+}
+
+/*
+ * Parse a file and configure the u-boot variables.
+ * The script file has a very simple format, as follows:
+ *
+ * Each line has a couple with name, value:
+ * <white spaces>variable_name<white spaces>variable_value
+ *
+ * Both variable_name and variable_value are interpreted as strings.
+ * Any character after <white spaces> and before ending \r\n is interpreted
+ * as variable's value (no comment allowed on these lines !)
+ *
+ * Comments are allowed if the first character in the line is #
+ *
+ * Returns -1 and sets errno error codes:
+ * 0 - OK
+ * -1 - Error
+ */
+int fw_parse_script(char *fname)
+{
+ FILE *fp;
+ char dump[1024]; /* Maximum line length in the file */
+ char *name;
+ char *val;
+ int lineno = 0;
+ int len;
+ int ret = 0;
+
+ if (fw_env_open()) {
+ fprintf(stderr, "Error: environment not initialized\n");
+ return -1;
+ }
+
+ if (strcmp(fname, "-") == 0)
+ fp = stdin;
+ else {
+ fp = fopen(fname, "r");
+ if (fp == NULL) {
+ fprintf(stderr, "I cannot open %s for reading\n",
+ fname);
+ return -1;
+ }
+ }
+
+ while (fgets(dump, sizeof(dump), fp)) {
+ lineno++;
+ len = strlen(dump);
+
+ /*
+ * Read a whole line from the file. If the line is too long
+ * or is not terminated, reports an error and exit.
+ */
+ if (dump[len - 1] != '\n') {
+ fprintf(stderr,
+ "Line %d not corrected terminated or too long\n",
+ lineno);
+ ret = -1;
+ break;
+ }
+
+ /* Drop ending line feed / carriage return */
+ while (len > 0 && (dump[len - 1] == '\n' ||
+ dump[len - 1] == '\r')) {
+ dump[len - 1] = '\0';
+ len--;
+ }
+
+ /* Skip comment or empty lines */
+ if ((len == 0) || dump[0] == '#')
+ continue;
+
+ /*
+ * Search for variable's name,
+ * remove leading whitespaces
+ */
+ name = fw_string_blank(dump, 1);
+ if (!name)
+ continue;
+
+ /* The first white space is the end of variable name */
+ val = fw_string_blank(name, 0);
+ len = strlen(name);
+ if (val) {
+ *val++ = '\0';
+ if ((val - name) < len)
+ val = fw_string_blank(val, 1);
+ else
+ val = NULL;
+ }
+
+#ifdef DEBUG
+ fprintf(stderr, "Setting %s : %s\n",
+ name, val ? val : " removed");
+#endif
+
+ if (env_flags_validate_type(name, val) < 0) {
+ ret = -1;
+ break;
+ }
+
+ /*
+ * If there is an error setting a variable,
+ * try to save the environment and returns an error
+ */
+ if (fw_env_write(name, val)) {
+ fprintf(stderr,
+ "fw_env_write returns with error : %s\n",
+ strerror(errno));
+ ret = -1;
+ break;
+ }
+
+ }
+
+ /* Close file if not stdin */
+ if (strcmp(fname, "-") != 0)
+ fclose(fp);
+
+ ret |= fw_env_close();
+
+ return ret;
+
+}
+
+/*
+ * 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)
+{
+ if (mtd_type == MTD_NANDFLASH) {
+ int badblock = ioctl (fd, MEMGETBADBLOCK, blockstart);
+
+ 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;
+ }
+ }
+
+ 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;
+
+ blockstart = (offset / DEVESIZE (dev)) * DEVESIZE (dev);
+
+ /* 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) +
+ 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;
+ }
+
+ /* 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 (blockstart + block_seek + readlen > top_of_range) {
+ /* End of range is reached */
+ fprintf (stderr,
+ "Too few good blocks within range\n");
+ return -1;
+ }
+
+ if (rc) { /* block is bad */
+ blockstart += blocklen;
+ continue;
+ }
+
+ /*
+ * 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);
+
+ 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 on %s\n",
+ rc, blockstart + block_seek, DEVNAME(dev));
+#endif
+ processed += readlen;
+ readlen = min (blocklen, count - processed);
+ block_seek = 0;
+ blockstart += blocklen;
+ }
+
+ return processed;
+}
+
+/*
+ * Write count bytes at offset, but stay within ENVSECTORS (dev) sectors of
+ * DEVOFFSET (dev). Similar to the read case above, on NOR and dataflash 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 - excluding
+ 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;
+
+ /*
+ * For mtd devices only offset and size of the environment do matter
+ */
+ if (mtd_type == MTD_ABSENT) {
+ blocklen = count;
+ top_of_range = offset + count;
+ erase_len = blocklen;
+ blockstart = offset;
+ block_seek = 0;
+ write_total = blocklen;
+ } else {
+ blocklen = DEVESIZE(dev);
+
+ top_of_range = ((DEVOFFSET(dev) / blocklen) +
+ ENVSECTORS(dev)) * blocklen;
+
+ erase_offset = (offset / blocklen) * blocklen;
+
+ /* 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 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) * blocklen;
+ }
+
+ /*
+ * 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,
+ "Cannot malloc %zu bytes: %s\n",
+ erase_len, strerror (errno));
+ return -1;
+ }
+
+ rc = flash_read_buf (dev, fd, data, write_total, erase_offset,
+ mtd_type);
+ if (write_total != rc)
+ return -1;
+
+#ifdef DEBUG
+ fprintf(stderr, "Preserving data ");
+ if (block_seek != 0)
+ fprintf(stderr, "0x%x - 0x%lx", 0, block_seek - 1);
+ if (block_seek + count != write_total) {
+ if (block_seek != 0)
+ fprintf(stderr, " and ");
+ fprintf(stderr, "0x%lx - 0x%x",
+ block_seek + count, write_total - 1);
+ }
+ fprintf(stderr, "\n");
+#endif
+ /* 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 and SPI-dataflash */
+ 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 (rc) { /* block is bad */
+ blockstart += blocklen;
+ continue;
+ }
+
+ if (mtd_type != MTD_ABSENT) {
+ erase.start = blockstart;
+ ioctl(fd, MEMUNLOCK, &erase);
+ /* These do not need an explicit erase cycle */
+ if (mtd_type != MTD_DATAFLASH)
+ 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,
+ "Seek error on %s: %s\n",
+ DEVNAME (dev), strerror (errno));
+ return -1;
+ }
+
+#ifdef DEBUG
+ fprintf(stderr, "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;
+ }
+
+ if (mtd_type != MTD_ABSENT)
+ 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;
+ struct erase_info_user erase;
+
+ erase.start = DEVOFFSET (dev);
+ erase.length = DEVESIZE (dev);
+ /* 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;
+ }
+ ioctl (fd, MEMUNLOCK, &erase);
+ rc = write (fd, &obsolete_flag, sizeof (obsolete_flag));
+ ioctl (fd, MEMLOCK, &erase);
+ 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
+ fprintf(stderr, "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,
+ CUR_ENVSIZE, 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
+ fprintf(stderr,
+ "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;
+ struct stat st;
+ int rc;
+
+ rc = fstat(fd, &st);
+ if (rc < 0) {
+ fprintf(stderr, "Cannot stat the file %s\n",
+ DEVNAME(dev_current));
+ return -1;
+ }
+
+ if (S_ISCHR(st.st_mode)) {
+ rc = ioctl(fd, MEMGETINFO, &mtdinfo);
+ if (rc < 0) {
+ fprintf(stderr, "Cannot get MTD information for %s\n",
+ DEVNAME(dev_current));
+ return -1;
+ }
+ if (mtdinfo.type != MTD_NORFLASH &&
+ mtdinfo.type != MTD_NANDFLASH &&
+ mtdinfo.type != MTD_DATAFLASH &&
+ mtdinfo.type != MTD_UBIVOLUME) {
+ fprintf (stderr, "Unsupported flash type %u on %s\n",
+ mtdinfo.type, DEVNAME(dev_current));
+ return -1;
+ }
+ } else {
+ memset(&mtdinfo, 0, sizeof(mtdinfo));
+ mtdinfo.type = MTD_ABSENT;
+ }
+
+ DEVTYPE(dev_current) = mtdinfo.type;
+
+ rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE,
+ DEVOFFSET (dev_current), mtdinfo.type);
+
+ return (rc != CUR_ENVSIZE) ? -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) {
+ /* 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,
+ "Can't open %s: %s\n",
+ DEVNAME (dev_target),
+ strerror (errno));
+ rc = -1;
+ goto exit;
+ }
+ } else {
+ dev_target = dev_current;
+ fd_target = fd_current;
+ }
+
+ rc = flash_write (fd_current, fd_target, dev_target);
+
+ if (HaveRedundEnv) {
+ if (close (fd_target)) {
+ fprintf (stderr,
+ "I/O error on %s: %s\n",
+ DEVNAME (dev_target),
+ strerror (errno));
+ rc = -1;
+ }
+ }
+ } else {
+ rc = flash_read (fd_current);
+ }
+
+exit:
+ if (close (fd_current)) {
+ fprintf (stderr,
+ "I/O error on %s: %s\n",
+ DEVNAME (dev_current), strerror (errno));
+ return -1;
+ }
+
+ return rc;
+}
+
+/*
+ * s1 is either a simple 'name', or a 'name=value' pair.
+ * s2 is a 'name=value' pair.
+ * If the names match, return the value of s2, else NULL.
+ */
+
+static char *envmatch (char * s1, char * s2)
+{
+ if (s1 == NULL || s2 == NULL)
+ return NULL;
+
+ while (*s1 == *s2++)
+ if (*s1++ == '=')
+ return s2;
+ if (*s1 == '\0' && *(s2 - 1) == '=')
+ return s2;
+ return NULL;
+}
+
+/*
+ * Prevent confusion if running from erased flash memory
+ */
+int fw_env_open(void)
+{
+ int crc0, crc0_ok;
+ unsigned char flag0;
+ void *addr0;
+
+ int crc1, crc1_ok;
+ unsigned char flag1;
+ void *addr1;
+
+ struct env_image_single *single;
+ struct env_image_redundant *redundant;
+
+ if (parse_config ()) /* should fill envdevices */
+ return -1;
+
+ addr0 = calloc(1, CUR_ENVSIZE);
+ if (addr0 == NULL) {
+ fprintf(stderr,
+ "Not enough memory for environment (%ld bytes)\n",
+ CUR_ENVSIZE);
+ return -1;
+ }
+
+ /* read environment from FLASH to local buffer */
+ 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;
+ }
+
+ 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 (!crc0_ok) {
+ fprintf (stderr,
+ "Warning: Bad CRC, using default environment\n");
+ memcpy(environment.data, default_environment, sizeof default_environment);
+ }
+ } else {
+ flag0 = *environment.flags;
+
+ dev_current = 1;
+ addr1 = calloc(1, CUR_ENVSIZE);
+ if (addr1 == NULL) {
+ fprintf(stderr,
+ "Not enough memory for environment (%ld bytes)\n",
+ CUR_ENVSIZE);
+ return -1;
+ }
+ redundant = addr1;
+
+ /*
+ * 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 if (DEVTYPE(dev_current) == MTD_DATAFLASH &&
+ DEVTYPE(!dev_current) == MTD_DATAFLASH) {
+ environment.flag_scheme = FLAG_BOOLEAN;
+ } else if (DEVTYPE(dev_current) == MTD_UBIVOLUME &&
+ DEVTYPE(!dev_current) == MTD_UBIVOLUME) {
+ environment.flag_scheme = FLAG_INCREMENTAL;
+ } else if (DEVTYPE(dev_current) == MTD_ABSENT &&
+ DEVTYPE(!dev_current) == MTD_ABSENT) {
+ environment.flag_scheme = FLAG_INCREMENTAL;
+ } else {
+ fprintf (stderr, "Incompatible flash types!\n");
+ return -1;
+ }
+
+ 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);
+ 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)
+ dev_current = 1;
+ else if ((flag1 == 255 && flag0 == 0) ||
+ flag0 >= flag1)
+ dev_current = 0;
+ else /* flag1 > flag0 */
+ dev_current = 1;
+ 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);
+ }
+#ifdef DEBUG
+ fprintf(stderr, "Selected env in %s\n", DEVNAME(dev_current));
+#endif
+ }
+ return 0;
+}
+
+
+static int parse_config ()
+{
+ struct stat st;
+
+#if defined(CONFIG_FILE)
+ /* Fills in DEVNAME(), ENVSIZE(), DEVESIZE(). Or don't. */
+ if (get_config (CONFIG_FILE)) {
+ fprintf (stderr,
+ "Cannot parse config file: %s\n", strerror (errno));
+ return -1;
+ }
+#else
+ strcpy (DEVNAME (0), DEVICE1_NAME);
+ DEVOFFSET (0) = DEVICE1_OFFSET;
+ ENVSIZE (0) = ENV1_SIZE;
+ /* Default values are: erase-size=env-size, #sectors=1 */
+ DEVESIZE (0) = ENVSIZE (0);
+ ENVSECTORS (0) = 1;
+#ifdef DEVICE1_ESIZE
+ DEVESIZE (0) = DEVICE1_ESIZE;
+#endif
+#ifdef DEVICE1_ENVSECTORS
+ ENVSECTORS (0) = DEVICE1_ENVSECTORS;
+#endif
+
+#ifdef HAVE_REDUND
+ strcpy (DEVNAME (1), DEVICE2_NAME);
+ DEVOFFSET (1) = DEVICE2_OFFSET;
+ ENVSIZE (1) = ENV2_SIZE;
+ /* Default values are: erase-size=env-size, #sectors=1 */
+ DEVESIZE (1) = ENVSIZE (1);
+ ENVSECTORS (1) = 1;
+#ifdef DEVICE2_ESIZE
+ DEVESIZE (1) = DEVICE2_ESIZE;
+#endif
+#ifdef DEVICE2_ENVSECTORS
+ ENVSECTORS (1) = DEVICE2_ENVSECTORS;
+#endif
+ HaveRedundEnv = 1;
+#endif
+#endif
+ if (stat (DEVNAME (0), &st)) {
+ fprintf (stderr,
+ "Cannot access MTD device %s: %s\n",
+ DEVNAME (0), strerror (errno));
+ return -1;
+ }
+
+ if (HaveRedundEnv && stat (DEVNAME (1), &st)) {
+ fprintf (stderr,
+ "Cannot access MTD device %s: %s\n",
+ DEVNAME (1), strerror (errno));
+ return -1;
+ }
+ return 0;
+}
+
+#if defined(CONFIG_FILE)
+static int get_config (char *fname)
+{
+ FILE *fp;
+ int i = 0;
+ int rc;
+ char dump[128];
+
+ fp = fopen (fname, "r");
+ if (fp == NULL)
+ return -1;
+
+ while (i < 2 && fgets (dump, sizeof (dump), fp)) {
+ /* Skip incomplete conversions and comment strings */
+ if (dump[0] == '#')
+ continue;
+
+ rc = sscanf (dump, "%s %lx %lx %lx %lx",
+ DEVNAME (i),
+ &DEVOFFSET (i),
+ &ENVSIZE (i),
+ &DEVESIZE (i),
+ &ENVSECTORS (i));
+
+ if (rc < 3)
+ continue;
+
+ if (rc < 4)
+ /* Assume the erase size is the same as the env-size */
+ DEVESIZE(i) = ENVSIZE(i);
+
+ if (rc < 5)
+ /* Default - 1 sector */
+ ENVSECTORS (i) = 1;
+
+ i++;
+ }
+ fclose (fp);
+
+ HaveRedundEnv = i - 1;
+ if (!i) { /* No valid entries found */
+ errno = EINVAL;
+ return -1;
+ } else
+ return 0;
+}
+#endif