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https://github.com/brain-hackers/u-boot-brain
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![Wolfgang Denk](/assets/img/avatar_default.png)
Many of the help messages were not really helpful; for example, many commands that take no arguments would not print a correct synopsis line, but "No additional help available." which is not exactly wrong, but not helpful either. Commit ``Make "usage" messages more helpful.'' changed this partially. But it also became clear that lots of "Usage" and "Help" messages (fields "usage" and "help" in struct cmd_tbl_s respective) were actually redundant. This patch cleans this up - for example: Before: => help dtt dtt - Digital Thermometer and Thermostat Usage: dtt - Read temperature from digital thermometer and thermostat. After: => help dtt dtt - Read temperature from Digital Thermometer and Thermostat Usage: dtt Signed-off-by: Wolfgang Denk <wd@denx.de>
643 lines
14 KiB
C
643 lines
14 KiB
C
/*
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* (C) Copyright 2000-2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Andreas Heppel <aheppel@sysgo.de>
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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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*
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* Support for persistent environment data
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*
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* The "environment" is stored as a list of '\0' terminated
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* "name=value" strings. The end of the list is marked by a double
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* '\0'. New entries are always added at the end. Deleting an entry
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* shifts the remaining entries to the front. Replacing an entry is a
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* combination of deleting the old value and adding the new one.
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*
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* The environment is preceeded by a 32 bit CRC over the data part.
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*
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**************************************************************************
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <watchdog.h>
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#include <serial.h>
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#include <linux/stddef.h>
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#include <asm/byteorder.h>
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#if defined(CONFIG_CMD_NET)
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#include <net.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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#if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
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!defined(CONFIG_ENV_IS_IN_FLASH) && \
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!defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
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!defined(CONFIG_ENV_IS_IN_MG_DISK) && \
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!defined(CONFIG_ENV_IS_IN_NAND) && \
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!defined(CONFIG_ENV_IS_IN_NVRAM) && \
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!defined(CONFIG_ENV_IS_IN_ONENAND) && \
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!defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
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!defined(CONFIG_ENV_IS_NOWHERE)
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# error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
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SPI_FLASH|MG_DISK|NVRAM|NOWHERE}
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#endif
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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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************************************************************************/
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/*
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* Table with supported baudrates (defined in config_xyz.h)
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*/
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static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
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#define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
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/*
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* This variable is incremented on each do_setenv (), so it can
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* be used via get_env_id() as an indication, if the environment
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* has changed or not. So it is possible to reread an environment
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* variable only if the environment was changed ... done so for
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* example in NetInitLoop()
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*/
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static int env_id = 1;
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int get_env_id (void)
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{
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return env_id;
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}
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/************************************************************************
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* Command interface: print one or all environment variables
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*/
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/*
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* state 0: finish printing this string and return (matched!)
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* state 1: no matching to be done; print everything
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* state 2: continue searching for matched name
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*/
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static int printenv(char *name, int state)
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{
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int i, j;
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char c, buf[17];
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i = 0;
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buf[16] = '\0';
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while (state && env_get_char(i) != '\0') {
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if (state == 2 && envmatch((uchar *)name, i) >= 0)
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state = 0;
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j = 0;
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do {
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buf[j++] = c = env_get_char(i++);
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if (j == sizeof(buf) - 1) {
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if (state <= 1)
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puts(buf);
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j = 0;
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}
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} while (c != '\0');
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if (state <= 1) {
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if (j)
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puts(buf);
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putc('\n');
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}
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if (ctrlc())
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return -1;
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}
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if (state == 0)
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i = 0;
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return i;
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}
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int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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int i;
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int rcode = 0;
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if (argc == 1) {
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/* print all env vars */
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rcode = printenv(NULL, 1);
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if (rcode < 0)
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return 1;
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printf("\nEnvironment size: %d/%ld bytes\n",
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rcode, (ulong)ENV_SIZE);
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return 0;
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}
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/* print selected env vars */
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for (i = 1; i < argc; ++i) {
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char *name = argv[i];
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if (printenv(name, 2)) {
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printf("## Error: \"%s\" not defined\n", name);
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++rcode;
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}
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}
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return rcode;
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}
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/************************************************************************
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* Set a new environment variable,
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* or replace or delete an existing one.
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*
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* This function will ONLY work with a in-RAM copy of the environment
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*/
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int _do_setenv (int flag, int argc, char *argv[])
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{
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int i, len, oldval;
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int console = -1;
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uchar *env, *nxt = NULL;
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char *name;
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bd_t *bd = gd->bd;
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uchar *env_data = env_get_addr(0);
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if (!env_data) /* need copy in RAM */
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return 1;
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name = argv[1];
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if (strchr(name, '=')) {
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printf ("## Error: illegal character '=' in variable name \"%s\"\n", name);
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return 1;
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}
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env_id++;
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/*
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* search if variable with this name already exists
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*/
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oldval = -1;
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for (env=env_data; *env; env=nxt+1) {
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for (nxt=env; *nxt; ++nxt)
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;
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if ((oldval = envmatch((uchar *)name, env-env_data)) >= 0)
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break;
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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 >= 0) {
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#ifndef CONFIG_ENV_OVERWRITE
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/*
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* Ethernet Address and serial# can be set only once,
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* ver is readonly.
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*/
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if (
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#ifdef CONFIG_HAS_UID
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/* Allow serial# forced overwrite with 0xdeaf4add flag */
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((strcmp (name, "serial#") == 0) && (flag != 0xdeaf4add)) ||
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#else
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(strcmp (name, "serial#") == 0) ||
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#endif
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((strcmp (name, "ethaddr") == 0)
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#if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
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&& (strcmp ((char *)env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
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#endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
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) ) {
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printf ("Can't overwrite \"%s\"\n", name);
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return 1;
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}
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#endif
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/* Check for console redirection */
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if (strcmp(name,"stdin") == 0) {
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console = stdin;
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} else if (strcmp(name,"stdout") == 0) {
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console = stdout;
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} else if (strcmp(name,"stderr") == 0) {
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console = stderr;
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}
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if (console != -1) {
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if (argc < 3) { /* Cannot delete it! */
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printf("Can't delete \"%s\"\n", name);
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return 1;
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}
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#ifdef CONFIG_CONSOLE_MUX
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i = iomux_doenv(console, argv[2]);
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if (i)
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return i;
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#else
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/* Try assigning specified device */
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if (console_assign (console, argv[2]) < 0)
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return 1;
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#ifdef CONFIG_SERIAL_MULTI
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if (serial_assign (argv[2]) < 0)
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return 1;
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#endif
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#endif /* CONFIG_CONSOLE_MUX */
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}
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/*
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* Switch to new baudrate if new baudrate is supported
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*/
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if (strcmp(argv[1],"baudrate") == 0) {
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int baudrate = simple_strtoul(argv[2], NULL, 10);
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int i;
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for (i=0; i<N_BAUDRATES; ++i) {
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if (baudrate == baudrate_table[i])
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break;
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}
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if (i == N_BAUDRATES) {
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printf ("## Baudrate %d bps not supported\n",
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baudrate);
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return 1;
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}
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printf ("## Switch baudrate to %d bps and press ENTER ...\n",
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baudrate);
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udelay(50000);
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gd->baudrate = baudrate;
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#if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
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gd->bd->bi_baudrate = baudrate;
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#endif
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serial_setbrg ();
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udelay(50000);
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for (;;) {
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if (getc() == '\r')
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break;
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}
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}
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if (*++nxt == '\0') {
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if (env > env_data) {
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env--;
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} else {
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*env = '\0';
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}
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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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/* Delete only ? */
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if ((argc < 3) || argv[2] == NULL) {
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env_crc_update ();
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return 0;
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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=env_data; *env || *(env+1); ++env)
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;
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if (env > env_data)
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++env;
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/*
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* Overflow when:
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* "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
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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 > (&env_data[ENV_SIZE]-env)) {
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printf ("## Error: environment overflow, \"%s\" deleted\n", 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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char *val = argv[i];
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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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/* end is marked with double '\0' */
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*++env = '\0';
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/* Update CRC */
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env_crc_update ();
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/*
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* Some variables should be updated when the corresponding
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* entry in the enviornment is changed
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*/
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if (strcmp(argv[1],"ethaddr") == 0)
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return 0;
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if (strcmp(argv[1],"ipaddr") == 0) {
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char *s = argv[2]; /* always use only one arg */
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char *e;
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unsigned long addr;
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bd->bi_ip_addr = 0;
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for (addr=0, i=0; i<4; ++i) {
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ulong val = s ? simple_strtoul(s, &e, 10) : 0;
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addr <<= 8;
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addr |= (val & 0xFF);
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if (s) s = (*e) ? e+1 : e;
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}
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bd->bi_ip_addr = htonl(addr);
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return 0;
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}
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if (strcmp(argv[1],"loadaddr") == 0) {
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load_addr = simple_strtoul(argv[2], NULL, 16);
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return 0;
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}
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#if defined(CONFIG_CMD_NET)
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if (strcmp(argv[1],"bootfile") == 0) {
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copy_filename (BootFile, argv[2], sizeof(BootFile));
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return 0;
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}
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#endif
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#ifdef CONFIG_AMIGAONEG3SE
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if (strcmp(argv[1], "vga_fg_color") == 0 ||
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strcmp(argv[1], "vga_bg_color") == 0 ) {
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extern void video_set_color(unsigned char attr);
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extern unsigned char video_get_attr(void);
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video_set_color(video_get_attr());
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return 0;
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}
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#endif /* CONFIG_AMIGAONEG3SE */
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return 0;
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}
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int setenv (char *varname, char *varvalue)
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{
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char *argv[4] = { "setenv", varname, varvalue, NULL };
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if (varvalue == NULL)
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return _do_setenv (0, 2, argv);
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else
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return _do_setenv (0, 3, argv);
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}
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#ifdef CONFIG_HAS_UID
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void forceenv (char *varname, char *varvalue)
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{
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char *argv[4] = { "forceenv", varname, varvalue, NULL };
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_do_setenv (0xdeaf4add, 3, argv);
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}
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#endif
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int do_setenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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if (argc < 2) {
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cmd_usage(cmdtp);
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return 1;
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}
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return _do_setenv (flag, argc, argv);
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}
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/************************************************************************
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* Prompt for environment variable
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*/
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#if defined(CONFIG_CMD_ASKENV)
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int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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extern char console_buffer[CONFIG_SYS_CBSIZE];
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char message[CONFIG_SYS_CBSIZE];
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int size = CONFIG_SYS_CBSIZE - 1;
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int len;
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char *local_args[4];
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local_args[0] = argv[0];
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local_args[1] = argv[1];
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local_args[2] = NULL;
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local_args[3] = NULL;
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if (argc < 2) {
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cmd_usage(cmdtp);
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return 1;
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}
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/* Check the syntax */
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switch (argc) {
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case 1:
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cmd_usage(cmdtp);
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return 1;
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case 2: /* askenv envname */
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sprintf (message, "Please enter '%s':", argv[1]);
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break;
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case 3: /* askenv envname size */
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sprintf (message, "Please enter '%s':", argv[1]);
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size = simple_strtoul (argv[2], NULL, 10);
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break;
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default: /* askenv envname message1 ... messagen size */
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{
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int i;
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int pos = 0;
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for (i = 2; i < argc - 1; i++) {
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if (pos) {
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message[pos++] = ' ';
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}
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strcpy (message+pos, argv[i]);
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pos += strlen(argv[i]);
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}
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message[pos] = '\0';
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size = simple_strtoul (argv[argc - 1], NULL, 10);
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}
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break;
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}
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if (size >= CONFIG_SYS_CBSIZE)
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size = CONFIG_SYS_CBSIZE - 1;
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if (size <= 0)
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return 1;
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/* prompt for input */
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len = readline (message);
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if (size < len)
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console_buffer[size] = '\0';
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len = 2;
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if (console_buffer[0] != '\0') {
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local_args[2] = console_buffer;
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len = 3;
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}
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/* Continue calling setenv code */
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return _do_setenv (flag, len, local_args);
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}
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#endif
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/************************************************************************
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* Look up variable from environment,
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* return address of storage for that variable,
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* or NULL if not found
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*/
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char *getenv (char *name)
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{
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int i, nxt;
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WATCHDOG_RESET();
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for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
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int val;
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for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
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if (nxt >= CONFIG_ENV_SIZE) {
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return (NULL);
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}
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}
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if ((val=envmatch((uchar *)name, i)) < 0)
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continue;
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return ((char *)env_get_addr(val));
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}
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return (NULL);
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}
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int getenv_r (char *name, char *buf, unsigned len)
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{
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int i, nxt;
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for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
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int val, n;
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for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
|
|
if (nxt >= CONFIG_ENV_SIZE) {
|
|
return (-1);
|
|
}
|
|
}
|
|
if ((val=envmatch((uchar *)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(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
|
|
|
|
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);
|
|
}
|
|
|
|
U_BOOT_CMD(
|
|
saveenv, 1, 0, do_saveenv,
|
|
"save environment variables to persistent storage",
|
|
""
|
|
);
|
|
|
|
#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.
|
|
*/
|
|
|
|
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);
|
|
}
|
|
|
|
|
|
/**************************************************/
|
|
|
|
U_BOOT_CMD(
|
|
printenv, CONFIG_SYS_MAXARGS, 1, do_printenv,
|
|
"print environment variables",
|
|
"\n - print values of all environment variables\n"
|
|
"printenv name ...\n"
|
|
" - print value of environment variable 'name'"
|
|
);
|
|
|
|
U_BOOT_CMD(
|
|
setenv, CONFIG_SYS_MAXARGS, 0, do_setenv,
|
|
"set environment variables",
|
|
"name value ...\n"
|
|
" - set environment variable 'name' to 'value ...'\n"
|
|
"setenv name\n"
|
|
" - delete environment variable 'name'"
|
|
);
|
|
|
|
#if defined(CONFIG_CMD_ASKENV)
|
|
|
|
U_BOOT_CMD(
|
|
askenv, CONFIG_SYS_MAXARGS, 1, do_askenv,
|
|
"get environment variables from stdin",
|
|
"name [message] [size]\n"
|
|
" - get environment variable 'name' from stdin (max 'size' chars)\n"
|
|
"askenv name\n"
|
|
" - get environment variable 'name' from stdin\n"
|
|
"askenv name size\n"
|
|
" - get environment variable 'name' from stdin (max 'size' chars)\n"
|
|
"askenv name [message] size\n"
|
|
" - display 'message' string and get environment variable 'name'"
|
|
"from stdin (max 'size' chars)"
|
|
);
|
|
#endif
|
|
|
|
#if defined(CONFIG_CMD_RUN)
|
|
int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
|
|
U_BOOT_CMD(
|
|
run, CONFIG_SYS_MAXARGS, 1, do_run,
|
|
"run commands in an environment variable",
|
|
"var [...]\n"
|
|
" - run the commands in the environment variable(s) 'var'"
|
|
);
|
|
#endif
|