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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
/*
* RTC, Date & Time support: get and set date & time
*/
#include <common.h>
#include <command.h>
#include <dm.h>
#include <rtc.h>
#include <i2c.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
static const char * const weekdays[] = {
"Sun", "Mon", "Tues", "Wednes", "Thurs", "Fri", "Satur",
};
int mk_date (const char *, struct rtc_time *);
static struct rtc_time default_tm = { 0, 0, 0, 1, 1, 2000, 6, 0, 0 };
static int do_date(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct rtc_time tm;
int rcode = 0;
int old_bus __maybe_unused;
/* switch to correct I2C bus */
#ifdef CONFIG_DM_RTC
struct udevice *dev;
rcode = uclass_get_device_by_seq(UCLASS_RTC, 0, &dev);
if (rcode) {
rcode = uclass_get_device(UCLASS_RTC, 0, &dev);
if (rcode) {
printf("Cannot find RTC: err=%d\n", rcode);
return CMD_RET_FAILURE;
}
}
#elif CONFIG_IS_ENABLED(SYS_I2C_LEGACY)
old_bus = i2c_get_bus_num();
i2c_set_bus_num(CFG_SYS_RTC_BUS_NUM);
#else
old_bus = I2C_GET_BUS();
I2C_SET_BUS(CFG_SYS_RTC_BUS_NUM);
#endif
switch (argc) {
case 2: /* set date & time */
if (strcmp(argv[1],"reset") == 0) {
puts ("Reset RTC...\n");
#ifdef CONFIG_DM_RTC
rcode = dm_rtc_reset(dev);
if (!rcode)
rcode = dm_rtc_set(dev, &default_tm);
#else
rtc_reset();
rcode = rtc_set(&default_tm);
#endif
if (rcode)
puts("## Failed to set date after RTC reset\n");
} else {
/* initialize tm with current time */
#ifdef CONFIG_DM_RTC
rcode = dm_rtc_get(dev, &tm);
#else
rcode = rtc_get(&tm);
#endif
if (!rcode) {
/* insert new date & time */
if (mk_date(argv[1], &tm) != 0) {
puts ("## Bad date format\n");
break;
}
/* and write to RTC */
#ifdef CONFIG_DM_RTC
rcode = dm_rtc_set(dev, &tm);
#else
rcode = rtc_set(&tm);
#endif
if (rcode) {
printf("## Set date failed: err=%d\n",
rcode);
}
} else {
puts("## Get date failed\n");
}
}
fallthrough;
case 1: /* get date & time */
#ifdef CONFIG_DM_RTC
rcode = dm_rtc_get(dev, &tm);
#else
rcode = rtc_get(&tm);
#endif
if (rcode) {
puts("## Get date failed\n");
break;
}
printf ("Date: %4d-%02d-%02d (%sday) Time: %2d:%02d:%02d\n",
tm.tm_year, tm.tm_mon, tm.tm_mday,
(tm.tm_wday<0 || tm.tm_wday>6) ?
"unknown " : weekdays[tm.tm_wday],
tm.tm_hour, tm.tm_min, tm.tm_sec);
break;
default:
rcode = CMD_RET_USAGE;
}
/* switch back to original I2C bus */
#if CONFIG_IS_ENABLED(SYS_I2C_LEGACY)
i2c_set_bus_num(old_bus);
#elif !defined(CONFIG_DM_RTC)
I2C_SET_BUS(old_bus);
#endif
return rcode ? CMD_RET_FAILURE : 0;
}
/*
* simple conversion of two-digit string with error checking
*/
static int cnvrt2 (const 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 (const char *datestr, struct rtc_time *tmp)
{
int len, val;
char *ptr;
ptr = strchr(datestr, '.');
len = strlen(datestr);
/* Set seconds */
if (ptr) {
int sec;
ptr++;
if ((len - (ptr - datestr)) != 2)
return (-1);
len -= 3;
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, ¢ury) ||
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 */
rtc_calc_weekday(tmp);
return (0);
default:
break;
}
return (-1);
}
/***************************************************/
U_BOOT_CMD(
date, 2, 1, do_date,
"get/set/reset date & time",
"[MMDDhhmm[[CC]YY][.ss]]\ndate reset\n"
" - without arguments: print date & time\n"
" - with numeric argument: set the system date & time\n"
" - with 'reset' argument: reset the RTC"
);
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