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-rw-r--r--common/cmd_nvedit.c535
1 files changed, 535 insertions, 0 deletions
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
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@@ -0,0 +1,535 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.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
+ */
+
+/**************************************************************************
+ *
+ * Support for persistent environment data
+ *
+ * The "environment" is stored as a list of '\0' terminated
+ * "name=value" strings. The end of the list is marked by a double
+ * '\0'. New entries are always added at the end. Deleting an entry
+ * shifts the remaining entries to the front. Replacing an entry is a
+ * combination of deleting the old value and adding the new one.
+ *
+ * The environment is preceeded by a 32 bit CRC over the data part.
+ *
+ **************************************************************************
+ */
+
+#include <common.h>
+#include <command.h>
+#include <environment.h>
+#include <cmd_nvedit.h>
+#include <linux/stddef.h>
+#include <asm/byteorder.h>
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+#include <net.h>
+#endif
+
+#if !defined(CFG_ENV_IS_IN_NVRAM) && !defined(CFG_ENV_IS_IN_EEPROM) && !defined(CFG_ENV_IS_IN_FLASH) && !defined(CFG_ENV_IS_NOWHERE)
+# error Define one of CFG_ENV_IS_IN_NVRAM, CFG_ENV_IS_IN_EEPROM, CFG_ENV_IS_IN_FLASH, CFG_ENV_IS_NOWHERE
+#endif
+
+#define XMK_STR(x) #x
+#define MK_STR(x) XMK_STR(x)
+
+/************************************************************************
+************************************************************************/
+
+/* Function that returns a character from the environment */
+extern uchar (*env_get_char)(int);
+
+/* Function that returns a pointer to a value from the environment */
+/* (Only memory version supported / needed). */
+extern uchar *env_get_addr(int);
+
+/* Function that updates CRC of the enironment */
+extern void env_crc_update (void);
+
+/************************************************************************
+************************************************************************/
+
+static int envmatch (uchar *, int);
+
+/*
+ * Table with supported baudrates (defined in config_xyz.h)
+ */
+static const unsigned long baudrate_table[] = CFG_BAUDRATE_TABLE;
+#define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
+
+
+/************************************************************************
+ * Command interface: print one or all environment variables
+ */
+
+int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ int i, j, k, nxt;
+ int rcode = 0;
+
+ if (argc == 1) { /* Print all env variables */
+ for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
+ for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
+ ;
+ for (k=i; k<nxt; ++k)
+ putc(env_get_char(k));
+ putc ('\n');
+
+ if (ctrlc()) {
+ puts ("\n ** Abort\n");
+ return 1;
+ }
+ }
+
+ printf("\nEnvironment size: %d/%d bytes\n", i, ENV_SIZE);
+
+ return 0;
+ }
+
+ for (i=1; i<argc; ++i) { /* print single env variables */
+ char *name = argv[i];
+
+ k = -1;
+
+ for (j=0; env_get_char(j) != '\0'; j=nxt+1) {
+
+ for (nxt=j; env_get_char(nxt) != '\0'; ++nxt)
+ ;
+ k = envmatch(name, j);
+ if (k < 0) {
+ continue;
+ }
+ puts (name);
+ putc ('=');
+ while (k < nxt)
+ putc(env_get_char(k++));
+ putc ('\n');
+ break;
+ }
+ if (k < 0) {
+ printf ("## Error: \"%s\" not defined\n", name);
+ rcode ++;
+ }
+ }
+ return rcode;
+}
+
+/************************************************************************
+ * Set a new environment variable,
+ * or replace or delete an existing one.
+ *
+ * This function will ONLY work with a in-RAM copy of the environment
+ */
+
+int _do_setenv (int flag, int argc, char *argv[])
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ int i, len, oldval;
+ int console = -1;
+ uchar *env, *nxt = NULL;
+ uchar *name;
+ bd_t *bd = gd->bd;
+
+ uchar *env_data = env_get_addr(0);
+
+ if (!env_data) /* need copy in RAM */
+ return 1;
+
+ name = argv[1];
+
+ /*
+ * search if variable with this name already exists
+ */
+ oldval = -1;
+ for (env=env_data; *env; env=nxt+1) {
+ for (nxt=env; *nxt; ++nxt)
+ ;
+ if ((oldval = envmatch(name, env-env_data)) >= 0)
+ break;
+ }
+
+ /*
+ * Delete any existing definition
+ */
+ if (oldval >= 0) {
+#ifndef CONFIG_ENV_OVERWRITE
+
+ /*
+ * Ethernet Address and serial# can be set only once
+ */
+ if ( (strcmp (name, "serial#") == 0) ||
+ ((strcmp (name, "ethaddr") == 0)
+#if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
+ && (strcmp (env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
+#endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
+ ) ) {
+ printf ("Can't overwrite \"%s\"\n", name);
+ return 1;
+ }
+#endif
+
+ /* Check for console redirection */
+ if (strcmp(name,"stdin") == 0) {
+ console = stdin;
+ } else if (strcmp(name,"stdout") == 0) {
+ console = stdout;
+ } else if (strcmp(name,"stderr") == 0) {
+ console = stderr;
+ }
+
+ if (console != -1) {
+ if (argc < 3) { /* Cannot delete it! */
+ printf("Can't delete \"%s\"\n", name);
+ return 1;
+ }
+
+ /* Try assigning specified device */
+ if (console_assign (console, argv[2]) < 0)
+ return 1;
+ }
+
+ /*
+ * Switch to new baudrate if new baudrate is supported
+ */
+ if (strcmp(argv[1],"baudrate") == 0) {
+ int baudrate = simple_strtoul(argv[2], NULL, 10);
+ int i;
+ for (i=0; i<N_BAUDRATES; ++i) {
+ if (baudrate == baudrate_table[i])
+ break;
+ }
+ if (i == N_BAUDRATES) {
+ printf ("## Baudrate %d bps not supported\n",
+ baudrate);
+ return 1;
+ }
+ printf ("## Switch baudrate to %d bps and press ENTER ...\n",
+ baudrate);
+ udelay(50000);
+ gd->baudrate = baudrate;
+ serial_setbrg ();
+ udelay(50000);
+ for (;;) {
+ if (getc() == '\r')
+ break;
+ }
+ }
+
+ if (*++nxt == '\0') {
+ if (env > env_data) {
+ env--;
+ } else {
+ *env = '\0';
+ }
+ } else {
+ for (;;) {
+ *env = *nxt++;
+ if ((*env == '\0') && (*nxt == '\0'))
+ break;
+ ++env;
+ }
+ }
+ *++env = '\0';
+ }
+
+#ifdef CONFIG_NET_MULTI
+ if (strncmp(name, "eth", 3) == 0) {
+ char *end;
+ int num = simple_strtoul(name+3, &end, 10);
+
+ if (strcmp(end, "addr") == 0) {
+ eth_set_enetaddr(num, argv[2]);
+ }
+ }
+#endif
+
+
+ /* Delete only ? */
+ if ((argc < 3) || argv[2] == NULL) {
+ env_crc_update ();
+ return 0;
+ }
+
+ /*
+ * Append new definition at the end
+ */
+ for (env=env_data; *env || *(env+1); ++env)
+ ;
+ if (env > env_data)
+ ++env;
+ /*
+ * Overflow when:
+ * "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
+ */
+ len = strlen(name) + 2;
+ /* add '=' for first arg, ' ' for all others */
+ for (i=2; i<argc; ++i) {
+ len += strlen(argv[i]) + 1;
+ }
+ if (len > (&env_data[ENV_SIZE]-env)) {
+ printf ("## Error: environment overflow, \"%s\" deleted\n", name);
+ return 1;
+ }
+ while ((*env = *name++) != '\0')
+ env++;
+ for (i=2; i<argc; ++i) {
+ char *val = argv[i];
+
+ *env = (i==2) ? '=' : ' ';
+ while ((*++env = *val++) != '\0')
+ ;
+ }
+
+ /* end is marked with double '\0' */
+ *++env = '\0';
+
+ /* Update CRC */
+ env_crc_update ();
+
+ /*
+ * Some variables should be updated when the corresponding
+ * entry in the enviornment is changed
+ */
+
+ if (strcmp(argv[1],"ethaddr") == 0) {
+ char *s = argv[2]; /* always use only one arg */
+ char *e;
+ for (i=0; i<6; ++i) {
+ bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
+ if (s) s = (*e) ? e+1 : e;
+ }
+#ifdef CONFIG_NET_MULTI
+ eth_set_enetaddr(0, argv[2]);
+#endif
+ return 0;
+ }
+
+ if (strcmp(argv[1],"ipaddr") == 0) {
+ char *s = argv[2]; /* always use only one arg */
+ char *e;
+ unsigned long addr;
+ bd->bi_ip_addr = 0;
+ for (addr=0, i=0; i<4; ++i) {
+ ulong val = s ? simple_strtoul(s, &e, 10) : 0;
+ addr <<= 8;
+ addr |= (val & 0xFF);
+ if (s) s = (*e) ? e+1 : e;
+ }
+ bd->bi_ip_addr = htonl(addr);
+ return 0;
+ }
+ if (strcmp(argv[1],"loadaddr") == 0) {
+ load_addr = simple_strtoul(argv[2], NULL, 16);
+ return 0;
+ }
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+ if (strcmp(argv[1],"bootfile") == 0) {
+ copy_filename (BootFile, argv[2], sizeof(BootFile));
+ return 0;
+ }
+#endif /* CFG_CMD_NET */
+ return 0;
+}
+
+void setenv (char *varname, char *varvalue)
+{
+ char *argv[4] = { "setenv", varname, varvalue, NULL };
+ _do_setenv (0, 3, argv);
+}
+
+int do_setenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ if (argc < 2) {
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+
+ return _do_setenv (flag, argc, argv);
+}
+
+/************************************************************************
+ * Prompt for environment variable
+ */
+
+#if (CONFIG_COMMANDS & CFG_CMD_ASKENV)
+int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ extern char console_buffer[CFG_CBSIZE];
+ char message[CFG_CBSIZE];
+ int size = CFG_CBSIZE - 1;
+ int len;
+ char *local_args[4];
+
+ local_args[0] = argv[0];
+ local_args[1] = argv[1];
+ local_args[2] = NULL;
+ local_args[3] = NULL;
+
+ if (argc < 2) {
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+ /* Check the syntax */
+ switch (argc) {
+ case 1:
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+
+ case 2: /* askenv envname */
+ sprintf (message, "Please enter '%s':", argv[1]);
+ break;
+
+ case 3: /* askenv envname size */
+ sprintf (message, "Please enter '%s':", argv[1]);
+ size = simple_strtoul (argv[2], NULL, 10);
+ break;
+
+ default: /* askenv envname message1 ... messagen size */
+ {
+ int i;
+ int pos = 0;
+
+ for (i = 2; i < argc - 1; i++) {
+ if (pos) {
+ message[pos++] = ' ';
+ }
+ strcpy (message+pos, argv[i]);
+ pos += strlen(argv[i]);
+ }
+ message[pos] = '\0';
+ size = simple_strtoul (argv[argc - 1], NULL, 10);
+ }
+ break;
+ }
+
+ if (size >= CFG_CBSIZE)
+ size = CFG_CBSIZE - 1;
+
+ if (size <= 0)
+ return 1;
+
+ /* prompt for input */
+ len = readline (message);
+
+ if (size < len)
+ console_buffer[size] = '\0';
+
+ len = 2;
+ if (console_buffer[0] != '\0') {
+ local_args[2] = console_buffer;
+ len = 3;
+ }
+
+ /* Continue calling setenv code */
+ return _do_setenv (flag, len, local_args);
+}
+#endif /* CFG_CMD_ASKENV */
+
+/************************************************************************
+ * Look up variable from environment,
+ * return address of storage for that variable,
+ * or NULL if not found
+ */
+
+char *getenv (uchar *name)
+{
+ int i, nxt;
+
+ for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
+ int val;
+
+ for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
+ if (nxt >= CFG_ENV_SIZE) {
+ return (NULL);
+ }
+ }
+ if ((val=envmatch(name, i)) < 0)
+ continue;
+ return (env_get_addr(val));
+ }
+
+ return (NULL);
+}
+
+int getenv_r (uchar *name, uchar *buf, unsigned len)
+{
+ int i, nxt;
+
+ for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
+ int val, n;
+
+ for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
+ if (nxt >= CFG_ENV_SIZE) {
+ return (-1);
+ }
+ }
+ if ((val=envmatch(name, i)) < 0)
+ continue;
+ /* found; copy out */
+ n = 0;
+ while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
+ ;
+ if (len == n)
+ *buf = '\0';
+ return (n);
+ }
+ return (-1);
+}
+
+#if defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) || \
+ ((CONFIG_COMMANDS & (CFG_CMD_ENV|CFG_CMD_FLASH)) == \
+ (CFG_CMD_ENV|CFG_CMD_FLASH))
+int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ extern char * env_name_spec;
+
+ printf ("Saving Environment to %s...\n", env_name_spec);
+
+ return (saveenv() ? 1 : 0);
+}
+#endif
+
+
+/************************************************************************
+ * Match a name / name=value pair
+ *
+ * s1 is either a simple 'name', or a 'name=value' pair.
+ * i2 is the environment index for a 'name2=value2' pair.
+ * If the names match, return the index for the value2, else NULL.
+ */
+
+static int
+envmatch (uchar *s1, int i2)
+{
+
+ while (*s1 == env_get_char(i2++))
+ if (*s1++ == '=')
+ return(i2);
+ if (*s1 == '\0' && env_get_char(i2-1) == '=')
+ return(i2);
+ return(-1);
+}
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