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@@ -0,0 +1,662 @@
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+/*
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+ * (C) Copyright 2000
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+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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+ *
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+ * See file CREDITS for list of people who contributed to this
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+ * project.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of
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+ * the License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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+ * MA 02111-1307 USA
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+ */
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+
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+#include <errno.h>
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+#include <fcntl.h>
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <stddef.h>
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+#include <string.h>
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+#include <sys/types.h>
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+#include <sys/ioctl.h>
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+#include <sys/stat.h>
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+#include <unistd.h>
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+#include <linux/mtd/mtd.h>
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+#include "fw_env.h"
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+
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+typedef unsigned char uchar;
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+
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+#define CMD_GETENV "fw_printenv"
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+#define CMD_SETENV "fw_setenv"
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+
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+typedef struct envdev_s {
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+ uchar devname[16]; /* Device name */
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+ ulong env_size; /* environment size */
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+ ulong erase_size; /* device erase size */
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+} envdev_t;
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+
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+static envdev_t envdevices[2];
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+static int curdev;
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+
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+#define DEVNAME(i) envdevices[(i)].devname
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+#define ENVSIZE(i) envdevices[(i)].env_size
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+#define DEVESIZE(i) envdevices[(i)].erase_size
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+
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+#define CFG_ENV_SIZE ENVSIZE(curdev)
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+
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+#ifdef HAVE_REDUND
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+#define ENV_SIZE (CFG_ENV_SIZE - sizeof(long) - 1)
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+#else
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+#define ENV_SIZE (CFG_ENV_SIZE - sizeof(long))
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+#endif
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+
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+typedef struct environment_s {
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+ ulong crc; /* CRC32 over data bytes */
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+ uchar flags; /* active or obsolete */
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+ uchar *data;
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+} env_t;
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+
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+static env_t environment;
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+static int valid = 0;
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+
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+#ifdef HAVE_REDUND
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+static uchar active_flag = 1;
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+static uchar obsolete_flag = 0;
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+#endif
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+
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+#define XMK_STR(x) #x
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+#define MK_STR(x) XMK_STR(x)
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+
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+static uchar default_environment[] = {
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+#ifdef CONFIG_BOOTARGS
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+ "bootargs=" CONFIG_BOOTARGS "\0"
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+#endif
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+#ifdef CONFIG_BOOTCOMMAND
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+ "bootcmd=" CONFIG_BOOTCOMMAND "\0"
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+#endif
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+#if (CONFIG_BOOTDELAY >= 0)
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+ "bootdelay=" MK_STR(CONFIG_BOOTDELAY) "\0"
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+#endif
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+#if (CONFIG_BAUDRATE >= 0)
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+ "baudrate=" MK_STR(CONFIG_BAUDRATE) "\0"
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+#endif
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+#ifdef CONFIG_ETHADDR
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+ "ethaddr=" MK_STR(CONFIG_ETHADDR) "\0"
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+#endif
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+#ifdef CONFIG_IPADDR
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+ "ipaddr=" MK_STR(CONFIG_IPADDR) "\0"
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+#endif
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+#ifdef CONFIG_SERVERIP
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+ "serverip=" MK_STR(CONFIG_SERVERIP) "\0"
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+#endif
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+ "\0"
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+};
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+
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+static int flash_io (int mode);
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+static uchar *envmatch(uchar *s1, uchar *s2);
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+static int env_init(void);
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+static int parse_config(void);
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+
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+
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+/*
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+ * Search the environment for a variable.
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+ * Return the value, if found, or NULL, if not found.
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+ */
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+unsigned char *fw_getenv (unsigned char *name)
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+{
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+ uchar *env, *nxt;
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+
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+ if (env_init())
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+ return (NULL);
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+
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+ for (env=environment.data; *env; env=nxt+1) {
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+ uchar *val;
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+
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+ for (nxt=env; *nxt; ++nxt) {
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+ if (nxt >= &environment.data[ENV_SIZE]) {
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+ fprintf (stderr, "## Error: "
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+ "environment not terminated\n");
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+ return (NULL);
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+ }
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+ }
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+ val=envmatch(name, env);
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+ if (!val)
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+ continue;
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+ return (val);
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+ }
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+ return (NULL);
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+}
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+
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+/*
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+ * Print the current definition of one, or more, or all
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+ * environment variables
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+ */
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+void fw_printenv(int argc, char *argv[])
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+{
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+ uchar *env, *nxt;
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+ int i, n_flag;
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+
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+ if (env_init())
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+ return;
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+
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+ if (argc == 1) { /* Print all env variables */
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+ for (env=environment.data; *env; env=nxt+1) {
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+ for (nxt=env; *nxt; ++nxt) {
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+ if (nxt >= &environment.data[ENV_SIZE]) {
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+ fprintf (stderr, "## Error: "
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+ "environment not terminated\n");
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+ return;
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+ }
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+ }
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+
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+ printf("%s\n", env);
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+ }
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+ return;
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+ }
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+
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+ if (strcmp(argv[1], "-n") == 0) {
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+ n_flag = 1;
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+ ++argv;
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+ --argc;
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+ if (argc != 2) {
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+ fprintf (stderr, "## Error: "
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+ "`-n' option requires exactly one argument\n");
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+ return;
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+ }
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+ } else {
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+ n_flag = 0;
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+ }
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+
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+ for (i=1; i<argc; ++i) { /* print single env variables */
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+ uchar *name = argv[i];
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+ uchar *val = NULL;
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+
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+ for (env=environment.data; *env; env=nxt+1) {
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+
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+ for (nxt=env; *nxt; ++nxt) {
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+ if (nxt >= &environment.data[ENV_SIZE]) {
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+ fprintf (stderr, "## Error: "
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+ "environment not terminated\n");
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+ return;
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+ }
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+ }
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+ val=envmatch(name, env);
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+ if (val) {
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+ if (!n_flag) {
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+ fputs (name, stdout);
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+ putc ('=', stdout);
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+ }
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+ puts (val);
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+ break;
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+ }
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+ }
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+ if (!val)
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+ fprintf (stderr, "## Error: \"%s\" not defined\n",
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+ name);
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+ }
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+}
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+
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+/*
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+ * Deletes or sets environment variables. Returns errno style error codes:
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+ * 0 - OK
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+ * EINVAL - need at least 1 argument
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+ * EROFS - certain variables ("ethaddr", "serial#") cannot be
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+ * modified or deleted
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+ *
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+ */
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+int fw_setenv (int argc, char *argv[])
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+{
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+ int i, len;
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+ uchar *env, *nxt;
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+ uchar *oldval = NULL;
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+ uchar *name;
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+
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+ if (argc < 2) {
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+ return (EINVAL);
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+ }
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+
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+ if (env_init())
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+ return (errno);
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+
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+ name = argv[1];
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+
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+ /*
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+ * search if variable with this name already exists
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+ */
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+ for (env=environment.data; *env; env=nxt+1) {
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+ for (nxt=env; *nxt; ++nxt) {
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+ if (nxt >= &environment.data[ENV_SIZE]) {
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+ fprintf (stderr, "## Error: "
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+ "environment not terminated\n");
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+ return (EINVAL);
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+ }
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+ }
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+ if ((oldval=envmatch(name, env)) != NULL)
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+ break;
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+ }
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+
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+ /*
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+ * Delete any existing definition
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+ */
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+ if (oldval) {
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+ /*
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+ * Ethernet Address and serial# can be set only once
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+ */
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+ if ((strcmp (name, "ethaddr") == 0) ||
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+ (strcmp (name, "serial#") == 0) ) {
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+ fprintf (stderr, "Can't overwrite \"%s\"\n", name);
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+ return (EROFS);
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+ }
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+
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+ if (*++nxt == '\0') {
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+ *env = '\0';
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+ } else {
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+ for (;;) {
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+ *env = *nxt++;
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+ if ((*env == '\0') && (*nxt == '\0'))
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+ break;
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+ ++env;
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+ }
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+ }
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+ *++env = '\0';
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+ }
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+
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+ /* Delete only ? */
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+ if (argc < 3)
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+ goto WRITE_FLASH;
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+
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+ /*
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+ * Append new definition at the end
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+ */
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+ for (env=environment.data; *env || *(env+1); ++env)
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+ ;
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+ if (env > environment.data)
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+ ++env;
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+ /*
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+ * Overflow when:
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+ * "name" + "=" + "val" +"\0\0" > CFG_ENV_SIZE - (env-environment)
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+ */
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+ len = strlen(name) + 2;
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+ /* add '=' for first arg, ' ' for all others */
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+ for (i=2; i<argc; ++i) {
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+ len += strlen(argv[i]) + 1;
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+ }
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+ if (len > (&environment.data[ENV_SIZE]-env)) {
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+ fprintf (stderr,
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+ "Error: environment overflow, \"%s\" deleted\n",
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+ name);
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+ return (-1);
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+ }
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+ while ((*env = *name++) != '\0')
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+ env++;
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+ for (i=2; i<argc; ++i) {
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+ uchar *val = argv[i];
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+
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+ *env = (i==2) ? '=' : ' ';
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+ while ((*++env = *val++) != '\0')
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+ ;
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+ }
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+
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+ /* end is marked with double '\0' */
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+ *++env = '\0';
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+
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+WRITE_FLASH:
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+
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+ /* Update CRC */
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+ environment.crc = crc32(0, environment.data, ENV_SIZE);
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+
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+ /* write environment back to flash */
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+ if (flash_io (O_RDWR)) {
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+ fprintf (stderr,
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+ "Error: can't write fw_env to flash\n");
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+ return (-1);
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+ }
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+
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+ return (0);
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+}
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+
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+static int flash_io (int mode)
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+{
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+ int fd, fdr, rc, otherdev, len, resid;
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+ erase_info_t erase;
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+ char *data;
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+
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+ if ((fd = open(DEVNAME(curdev), mode)) < 0) {
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+ fprintf (stderr,
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+ "Can't open %s: %s\n",
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+ DEVNAME(curdev), strerror(errno));
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+ return (-1);
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+ }
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+
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+ len = sizeof(environment.crc) + sizeof(environment.flags);
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+
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+ if (mode == O_RDWR) {
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+#ifdef HAVE_REDUND
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+ /* switch to next partition for writing */
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+ otherdev = !curdev;
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+ if ((fdr = open(DEVNAME(otherdev), mode)) < 0) {
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+ fprintf (stderr,
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+ "Can't open %s: %s\n",
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+ DEVNAME(otherdev), strerror(errno));
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+ return (-1);
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+ }
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+#else
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+ otherdev = curdev;
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+ fdr = fd;
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+ len = sizeof(environment.crc);
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+#endif
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+ printf("Unlocking flash...\n");
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+ erase.length = DEVESIZE(otherdev);
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+ erase.start = 0;
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+ ioctl (fdr, MEMUNLOCK, &erase);
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+
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+#ifdef HAVE_REDUND
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+ erase.length = DEVESIZE(curdev);
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+ erase.start = 0;
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+ ioctl (fd, MEMUNLOCK, &erase);
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+ environment.flags = active_flag;
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+#endif
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+ printf("Done\n");
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+ resid = DEVESIZE(otherdev) - CFG_ENV_SIZE;
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+ if (resid) {
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+ if ((data = malloc(resid)) == NULL) {
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+ fprintf(stderr,
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+ "Cannot malloc %d bytes: %s\n",
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+ resid, strerror(errno));
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+ return (-1);
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+ }
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+ if (lseek (fdr, CFG_ENV_SIZE, SEEK_SET) == -1) {
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+ fprintf (stderr,
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+ "seek error on %s: %s\n",
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+ DEVNAME(curdev), strerror(errno));
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+ return (-1);
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+ }
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+ if ((rc = read (fdr, data, resid)) != resid) {
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+ fprintf (stderr,
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+ "read error on %s: %s\n",
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+ DEVNAME(curdev), strerror(errno));
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+ return (-1);
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+ }
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+ if (lseek (fdr, 0, SEEK_SET) == -1) {
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+ fprintf (stderr,
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+ "seek error on %s: %s\n",
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+ DEVNAME(curdev), strerror(errno));
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+ return (-1);
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+ }
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+ }
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+
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+ printf("Erasing old environment...\n");
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+
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+ erase.length = DEVESIZE(otherdev);
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+ if (ioctl (fdr, MEMERASE, &erase) != 0) {
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+ fprintf (stderr, "MTD erase error on %s: %s\n",
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+ DEVNAME(otherdev), strerror(errno));
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+ return (-1);
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+ }
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+
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+ printf("Done\n");
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+
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+ printf("Writing environment to %s...\n",DEVNAME(otherdev));
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+ if (write(fdr, &environment, len) != len) {
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+ fprintf (stderr,
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+ "CRC write error on %s: %s\n",
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+ DEVNAME(otherdev), strerror(errno));
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+ return (-1);
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+ }
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+ if (write(fdr, environment.data, ENV_SIZE) != ENV_SIZE) {
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+ fprintf (stderr,
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+ "Write error on %s: %s\n",
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+ DEVNAME(otherdev), strerror(errno));
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+ return (-1);
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+ }
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+ if (resid) {
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+ if (write (fdr, data, resid) != resid) {
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+ fprintf (stderr,
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+ "write error on %s: %s\n",
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+ DEVNAME(curdev), strerror(errno));
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+ return (-1);
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+ }
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+ free(data);
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+ }
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+#ifdef HAVE_REDUND
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+ /* change flag on current active env partition */
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+ if (lseek (fd, sizeof(ulong), SEEK_SET) == -1) {
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+ fprintf (stderr,
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+ "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);
|
|
|
+ }
|
|
|
+#endif
|
|
|
+ printf("Done\n");
|
|
|
+ printf("Locking ...\n");
|
|
|
+ erase.length = DEVESIZE(otherdev);
|
|
|
+ erase.start = 0;
|
|
|
+ ioctl (fdr, MEMLOCK, &erase);
|
|
|
+#ifdef HAVE_REDUND
|
|
|
+ erase.length = DEVESIZE(curdev);
|
|
|
+ erase.start = 0;
|
|
|
+ ioctl (fd, MEMLOCK, &erase);
|
|
|
+ if (close(fdr)) {
|
|
|
+ fprintf (stderr,
|
|
|
+ "I/O error on %s: %s\n",
|
|
|
+ DEVNAME(otherdev), strerror(errno));
|
|
|
+ return (-1);
|
|
|
+ }
|
|
|
+#endif
|
|
|
+ printf("Done\n");
|
|
|
+ } else {
|
|
|
+#ifndef HAVE_REDUND
|
|
|
+ len = sizeof(environment.crc);
|
|
|
+#endif
|
|
|
+ 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;
|
|
|
+#ifdef HAVE_REDUND
|
|
|
+ int crc2, crc2_ok;
|
|
|
+ uchar flag1, flag2, *addr2;
|
|
|
+#endif
|
|
|
+
|
|
|
+
|
|
|
+ if (!valid) {
|
|
|
+
|
|
|
+ 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);
|
|
|
+#ifndef HAVE_REDUND
|
|
|
+ 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);
|
|
|
+ }
|
|
|
+#endif
|
|
|
+ valid = 1;
|
|
|
+ }
|
|
|
+ return (0);
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int parse_config()
|
|
|
+{
|
|
|
+ struct stat st;
|
|
|
+
|
|
|
+ if (stat (DEVICE1_NAME, &st)) {
|
|
|
+ fprintf (stderr,
|
|
|
+ "Cannot access MTD device %s: %s\n",
|
|
|
+ DEVICE1_NAME, strerror(errno));
|
|
|
+ return 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ strcpy(DEVNAME(0), DEVICE1_NAME);
|
|
|
+ ENVSIZE(0) = ENV1_SIZE;
|
|
|
+ DEVESIZE(0) = DEVICE1_ESIZE;
|
|
|
+#ifdef HAVE_REDUND
|
|
|
+ if (stat (DEVICE2_NAME, &st)) {
|
|
|
+ fprintf (stderr,
|
|
|
+ "Cannot access MTD device %s: %s\n",
|
|
|
+ DEVICE2_NAME, strerror(errno));
|
|
|
+ return 1;
|
|
|
+ }
|
|
|
+ strcpy(DEVNAME(1), DEVICE2_NAME);
|
|
|
+ ENVSIZE(1) = ENV2_SIZE;
|
|
|
+ DEVESIZE(1) = DEVICE2_ESIZE;
|
|
|
+#endif
|
|
|
+ return 0;
|
|
|
+}
|
wdenk