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uboot-1.1.4-kirkwood/tools/env/fw_env.c
Olaf Rempel f69754bccc u-boot 1.1.4
2024-01-07 23:57:24 +01:00

771 lines
17 KiB
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/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <errno.h>
#include <fcntl.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>
#include <linux/mtd/mtd.h>
#include "fw_env.h"
typedef unsigned char uchar;
#define CMD_GETENV "fw_printenv"
#define CMD_SETENV "fw_setenv"
typedef struct envdev_s {
uchar devname[16]; /* Device name */
ulong devoff; /* Device offset */
ulong env_size; /* environment size */
ulong erase_size; /* device erase size */
} envdev_t;
static envdev_t envdevices[2];
static int curdev;
#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 CFG_ENV_SIZE ENVSIZE(curdev)
#define ENV_SIZE getenvsize()
typedef struct environment_s {
ulong crc; /* CRC32 over data bytes */
uchar flags; /* active or obsolete */
uchar *data;
} env_t;
static env_t environment;
static int HaveRedundEnv = 0;
static uchar active_flag = 1;
static uchar obsolete_flag = 0;
#define XMK_STR(x) #x
#define MK_STR(x) XMK_STR(x)
static uchar default_environment[] = {
#if defined(CONFIG_BOOTARGS)
"bootargs=" CONFIG_BOOTARGS "\0"
#endif
#if defined(CONFIG_BOOTCOMMAND)
"bootcmd=" CONFIG_BOOTCOMMAND "\0"
#endif
#if defined(CONFIG_RAMBOOTCOMMAND)
"ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
#endif
#if defined(CONFIG_NFSBOOTCOMMAND)
"nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
#endif
#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
"bootdelay=" MK_STR (CONFIG_BOOTDELAY) "\0"
#endif
#if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
"baudrate=" MK_STR (CONFIG_BAUDRATE) "\0"
#endif
#ifdef CONFIG_LOADS_ECHO
"loads_echo=" MK_STR (CONFIG_LOADS_ECHO) "\0"
#endif
#ifdef CONFIG_ETHADDR
"ethaddr=" MK_STR (CONFIG_ETHADDR) "\0"
#endif
#ifdef CONFIG_ETH1ADDR
"eth1addr=" MK_STR (CONFIG_ETH1ADDR) "\0"
#endif
#ifdef CONFIG_ETH2ADDR
"eth2addr=" MK_STR (CONFIG_ETH2ADDR) "\0"
#endif
#ifdef CONFIG_ETH3ADDR
"eth3addr=" MK_STR (CONFIG_ETH3ADDR) "\0"
#endif
#ifdef CONFIG_ETHPRIME
"ethprime=" CONFIG_ETHPRIME "\0"
#endif
#ifdef CONFIG_IPADDR
"ipaddr=" MK_STR (CONFIG_IPADDR) "\0"
#endif
#ifdef CONFIG_SERVERIP
"serverip=" MK_STR (CONFIG_SERVERIP) "\0"
#endif
#ifdef CFG_AUTOLOAD
"autoload=" CFG_AUTOLOAD "\0"
#endif
#ifdef CONFIG_ROOTPATH
"rootpath=" MK_STR (CONFIG_ROOTPATH) "\0"
#endif
#ifdef CONFIG_GATEWAYIP
"gatewayip=" MK_STR (CONFIG_GATEWAYIP) "\0"
#endif
#ifdef CONFIG_NETMASK
"netmask=" MK_STR (CONFIG_NETMASK) "\0"
#endif
#ifdef CONFIG_HOSTNAME
"hostname=" MK_STR (CONFIG_HOSTNAME) "\0"
#endif
#ifdef CONFIG_BOOTFILE
"bootfile=" MK_STR (CONFIG_BOOTFILE) "\0"
#endif
#ifdef CONFIG_LOADADDR
"loadaddr=" MK_STR (CONFIG_LOADADDR) "\0"
#endif
#ifdef CONFIG_PREBOOT
"preboot=" CONFIG_PREBOOT "\0"
#endif
#ifdef CONFIG_CLOCKS_IN_MHZ
"clocks_in_mhz=" "1" "\0"
#endif
#if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
"pcidelay=" MK_STR (CONFIG_PCI_BOOTDELAY) "\0"
#endif
#ifdef CONFIG_EXTRA_ENV_SETTINGS
CONFIG_EXTRA_ENV_SETTINGS
#endif
"\0" /* Termimate env_t data with 2 NULs */
};
static int flash_io (int mode);
static uchar *envmatch (uchar * s1, uchar * s2);
static int env_init (void);
static int parse_config (void);
#if defined(CONFIG_FILE)
static int get_config (char *);
#endif
static inline ulong getenvsize (void)
{
ulong rc = CFG_ENV_SIZE - sizeof (long);
if (HaveRedundEnv)
rc -= sizeof (char);
return rc;
}
/*
* Search the environment for a variable.
* Return the value, if found, or NULL, if not found.
*/
unsigned char *fw_getenv (unsigned char *name)
{
uchar *env, *nxt;
if (env_init ())
return (NULL);
for (env = environment.data; *env; env = nxt + 1) {
uchar *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);
}
/*
* Print the current definition of one, or more, or all
* environment variables
*/
void fw_printenv (int argc, char *argv[])
{
uchar *env, *nxt;
int i, n_flag;
if (env_init ())
return;
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;
}
}
printf ("%s\n", env);
}
return;
}
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;
}
} else {
n_flag = 0;
}
for (i = 1; i < argc; ++i) { /* print single env variables */
uchar *name = argv[i];
uchar *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;
}
}
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);
}
}
/*
* Deletes or sets environment variables. Returns errno style 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, len;
uchar *env, *nxt;
uchar *oldval = NULL;
uchar *name;
if (argc < 2) {
return (EINVAL);
}
if (env_init ())
return (errno);
name = argv[1];
/*
* 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");
return (EINVAL);
}
}
if ((oldval = envmatch (name, env)) != NULL)
break;
}
/*
* Delete any existing definition
*/
if (oldval) {
/*
* Ethernet Address and serial# can be set only once
*/
if ((strcmp (name, "ethaddr") == 0) ||
(strcmp (name, "serial#") == 0)) {
fprintf (stderr, "Can't overwrite \"%s\"\n", name);
return (EROFS);
}
if (*++nxt == '\0') {
*env = '\0';
} else {
for (;;) {
*env = *nxt++;
if ((*env == '\0') && (*nxt == '\0'))
break;
++env;
}
}
*++env = '\0';
}
/* Delete only ? */
if (argc < 3)
goto WRITE_FLASH;
/*
* 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" > CFG_ENV_SIZE - (env-environment)
*/
len = strlen (name) + 2;
/* add '=' for first arg, ' ' for all others */
for (i = 2; i < argc; ++i) {
len += strlen (argv[i]) + 1;
}
if (len > (&environment.data[ENV_SIZE] - env)) {
fprintf (stderr,
"Error: environment overflow, \"%s\" deleted\n",
name);
return (-1);
}
while ((*env = *name++) != '\0')
env++;
for (i = 2; i < argc; ++i) {
uchar *val = argv[i];
*env = (i == 2) ? '=' : ' ';
while ((*++env = *val++) != '\0');
}
/* end is marked with double '\0' */
*++env = '\0';
WRITE_FLASH:
/* Update CRC */
environment.crc = crc32 (0, 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);
}
static int flash_io (int mode)
{
int fd, fdr, rc, otherdev, len, resid;
erase_info_t erase;
char *data = NULL;
if ((fd = open (DEVNAME (curdev), mode)) < 0) {
fprintf (stderr,
"Can't open %s: %s\n",
DEVNAME (curdev), strerror (errno));
return (-1);
}
len = sizeof (environment.crc);
if (HaveRedundEnv) {
len += sizeof (environment.flags);
}
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);
if (HaveRedundEnv) {
erase.length = DEVESIZE (curdev);
erase.start = DEVOFFSET (curdev);
ioctl (fd, MEMUNLOCK, &erase);
environment.flags = active_flag;
}
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);
}
}
printf ("Erasing old environment...\n");
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);
}
printf ("Done\n");
printf ("Writing environment to %s...\n", DEVNAME (otherdev));
if (lseek (fdr, DEVOFFSET (otherdev), SEEK_SET) == -1) {
fprintf (stderr,
"seek error on %s: %s\n",
DEVNAME (otherdev), 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);
}
if (write (fdr, environment.data, ENV_SIZE) != ENV_SIZE) {
fprintf (stderr,
"Write error on %s: %s\n",
DEVNAME (otherdev), 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);
}
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)) {
fprintf (stderr,
"Write error on %s: %s\n",
DEVNAME (curdev), strerror (errno));
return (-1);
}
}
printf ("Done\n");
printf ("Locking ...\n");
erase.length = DEVESIZE (otherdev);
erase.start = DEVOFFSET (otherdev);
ioctl (fdr, MEMLOCK, &erase);
if (HaveRedundEnv) {
erase.length = DEVESIZE (curdev);
erase.start = DEVOFFSET (curdev);
ioctl (fd, MEMLOCK, &erase);
if (close (fdr)) {
fprintf (stderr,
"I/O error on %s: %s\n",
DEVNAME (otherdev),
strerror (errno));
return (-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);
}
}
if (close (fd)) {
fprintf (stderr,
"I/O error on %s: %s\n",
DEVNAME (curdev), strerror (errno));
return (-1);
}
/* everything ok */
return (0);
}
/*
* 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 uchar *envmatch (uchar * s1, uchar * s2)
{
while (*s1 == *s2++)
if (*s1++ == '=')
return (s2);
if (*s1 == '\0' && *(s2 - 1) == '=')
return (s2);
return (NULL);
}
/*
* Prevent confusion if running from erased flash memory
*/
static int env_init (void)
{
int crc1, crc1_ok;
uchar *addr1;
int crc2, crc2_ok;
uchar flag1, flag2, *addr2;
if (parse_config ()) /* should fill envdevices */
return 1;
if ((addr1 = calloc (1, ENV_SIZE)) == NULL) {
fprintf (stderr,
"Not enough memory for environment (%ld bytes)\n",
ENV_SIZE);
return (errno);
}
/* read environment from FLASH to local buffer */
environment.data = addr1;
curdev = 0;
if (flash_io (O_RDONLY)) {
return (errno);
}
crc1_ok = ((crc1 = crc32 (0, environment.data, ENV_SIZE))
== environment.crc);
if (!HaveRedundEnv) {
if (!crc1_ok) {
fprintf (stderr,
"Warning: Bad CRC, using default environment\n");
environment.data = default_environment;
free (addr1);
}
} else {
flag1 = environment.flags;
curdev = 1;
if ((addr2 = calloc (1, ENV_SIZE)) == NULL) {
fprintf (stderr,
"Not enough memory for environment (%ld bytes)\n",
ENV_SIZE);
return (errno);
}
environment.data = addr2;
if (flash_io (O_RDONLY)) {
return (errno);
}
crc2_ok = ((crc2 = crc32 (0, 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) {
fprintf (stderr,
"Warning: Bad CRC, using default environment\n");
environment.data = default_environment;
curdev = 0;
free (addr2);
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;
free (addr1);
}
}
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;
DEVESIZE (0) = DEVICE1_ESIZE;
#ifdef HAVE_REDUND
strcpy (DEVNAME (1), DEVICE2_NAME);
DEVOFFSET (1) = DEVICE2_OFFSET;
ENVSIZE (1) = ENV2_SIZE;
DEVESIZE (1) = DEVICE2_ESIZE;
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];
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)) {
/* Skip incomplete conversions and comment strings */
if ((rc < 3) || (*DEVNAME (i) == '#')) {
fgets (dump, sizeof (dump), fp); /* Consume till end */
continue;
}
i++;
}
fclose (fp);
HaveRedundEnv = i - 1;
if (!i) { /* No valid entries found */
errno = EINVAL;
return 1;
} else
return 0;
}
#endif
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