Eric Lee / smarc-uboot

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common/cmd_date.c 3.92 KB
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3863585bb   wdenk   Initial revision 
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  /*
   * (C) Copyright 2001
   * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   *
   * See file CREDITS for list of people who contributed to this
   * project.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation; either version 2 of
   * the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
   * MA 02111-1307 USA
   */
  
  /*
   * RTC, Date & Time support: get and set date & time
   */
  #include <common.h>
  #include <command.h>
  #include <rtc.h>
  
  #if (CONFIG_COMMANDS & CFG_CMD_DATE)
  
  const char *weekdays[] = {
  	"Sun", "Mon", "Tues", "Wednes", "Thurs", "Fri", "Satur",
  };
3e38691e8   wdenk   * Patch by Arun D... 
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  #define RELOC(a)	((typeof(a))((unsigned long)(a) + gd->reloc_off))
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  int mk_date (char *, struct rtc_time *);
  
  int do_date (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  {
3e38691e8   wdenk   * Patch by Arun D... 
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  	DECLARE_GLOBAL_DATA_PTR;
3863585bb   wdenk   Initial revision 
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  	struct rtc_time tm;
  	int rcode = 0;
  
  	switch (argc) {
  	case 2:			/* set date & time */
  		if (strcmp(argv[1],"reset") == 0) {
  			printf ("Reset RTC...
  ");
  			rtc_reset ();
  		} else {
  			/* initialize tm with current time */
  			rtc_get (&tm);
  			/* insert new date & time */
  			if (mk_date (argv[1], &tm) != 0) {
  				printf ("## Bad date format
  ");
  				return 1;
  			}
  			/* and write to RTC */
  			rtc_set (&tm);
  		}
  		/* FALL TROUGH */
  	case 1:			/* get date & time */
  		rtc_get (&tm);
  
  		printf ("Date: %4d-%02d-%02d (%sday)    Time: %2d:%02d:%02d
  ",
  			tm.tm_year, tm.tm_mon, tm.tm_mday,
  			(tm.tm_wday<0 || tm.tm_wday>6) ?
3e38691e8   wdenk   * Patch by Arun D... 
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  				"unknown " : RELOC(weekdays[tm.tm_wday]),
3863585bb   wdenk   Initial revision 
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  			tm.tm_hour, tm.tm_min, tm.tm_sec);
  
  		return 0;
  	default:
  		printf ("Usage:
  %s
  ", cmdtp->usage);
  		rcode = 1;
  	}
  	return rcode;
  }
  
  /*
   * simple conversion of two-digit string with error checking
   */
  static int cnvrt2 (char *str, int *valp)
  {
  	int val;
  
  	if ((*str < '0') || (*str > '9'))
  		return (-1);
  
  	val = *str - '0';
  
  	++str;
  
  	if ((*str < '0') || (*str > '9'))
  		return (-1);
  
  	*valp = 10 * val + (*str - '0');
  
  	return (0);
  }
  
  /*
   * Convert date string: MMDDhhmm[[CC]YY][.ss]
   *
   * Some basic checking for valid values is done, but this will not catch
   * all possible error conditions.
   */
  int mk_date (char *datestr, struct rtc_time *tmp)
  {
  	int len, val;
  	char *ptr;
  
  	ptr = strchr (datestr,'.');
  	len = strlen (datestr);
  
  	/* Set seconds */
  	if (ptr) {
  		int sec;
  
  		*ptr++ = '\0';
  		if ((len - (ptr - datestr)) != 2)
  			return (-1);
  
  		len = strlen (datestr);
  
  		if (cnvrt2 (ptr, &sec))
  			return (-1);
  
  		tmp->tm_sec = sec;
  	} else {
  		tmp->tm_sec = 0;
  	}
  
  	if (len == 12) {		/* MMDDhhmmCCYY	*/
  		int year, century;
  
  		if (cnvrt2 (datestr+ 8, &century) ||
  		    cnvrt2 (datestr+10, &year) ) {
  			return (-1);
  		}
  		tmp->tm_year = 100 * century + year;
  	} else if (len == 10) {		/* MMDDhhmmYY	*/
  		int year, century;
  
  		century = tmp->tm_year / 100;
  		if (cnvrt2 (datestr+ 8, &year))
  			return (-1);
  		tmp->tm_year = 100 * century + year;
  	}
  
  	switch (len) {
  	case 8:			/* MMDDhhmm	*/
  		/* fall thru */
  	case 10:		/* MMDDhhmmYY	*/
  		/* fall thru */
  	case 12:		/* MMDDhhmmCCYY	*/
  		if (cnvrt2 (datestr+0, &val) ||
  		    val > 12) {
  			break;
  		}
  		tmp->tm_mon  = val;
  		if (cnvrt2 (datestr+2, &val) ||
  		    val > ((tmp->tm_mon==2) ? 29 : 31)) {
  			break;
  		}
  		tmp->tm_mday = val;
  
  		if (cnvrt2 (datestr+4, &val) ||
  		    val > 23) {
  			break;
  		}
  		tmp->tm_hour = val;
  
  		if (cnvrt2 (datestr+6, &val) ||
  		    val > 59) {
  			break;
  		}
  		tmp->tm_min  = val;
  
  		/* calculate day of week */
  		GregorianDay (tmp);
  
  		return (0);
  	default:
  		break;
  	}
  
  	return (-1);
  }
  
  #endif	/* CFG_CMD_DATE */