diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/cmd_nvedit.c | 535 |
1 files changed, 535 insertions, 0 deletions
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c new file mode 100644 index 0000000..08e888c --- /dev/null +++ b/common/cmd_nvedit.c @@ -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); +} |