mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-11 07:13:21 +09:00
125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
/*
|
|
* (C) Copyright 2010
|
|
* Heiko Schocher, DENX Software Engineering, hs@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
|
|
*/
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <i2c.h>
|
|
#include <rtc.h>
|
|
|
|
#define RTC_RV3029_CTRL_RESET 0x04
|
|
#define RTC_RV3029_CTRL_SYS_R (1 << 4)
|
|
|
|
#define RTC_RV3029_CLOCK_PAGE 0x08
|
|
#define RTC_RV3029_PAGE_LEN 7
|
|
|
|
#define RV3029C2_W_SECONDS 0x00
|
|
#define RV3029C2_W_MINUTES 0x01
|
|
#define RV3029C2_W_HOURS 0x02
|
|
#define RV3029C2_W_DATE 0x03
|
|
#define RV3029C2_W_DAYS 0x04
|
|
#define RV3029C2_W_MONTHS 0x05
|
|
#define RV3029C2_W_YEARS 0x06
|
|
|
|
#define RV3029C2_REG_HR_12_24 (1 << 6) /* 24h/12h mode */
|
|
#define RV3029C2_REG_HR_PM (1 << 5) /* PM/AM bit in 12h mode */
|
|
|
|
int rtc_get( struct rtc_time *tmp )
|
|
{
|
|
int ret;
|
|
unsigned char buf[RTC_RV3029_PAGE_LEN];
|
|
|
|
ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, buf, \
|
|
RTC_RV3029_PAGE_LEN);
|
|
if (ret) {
|
|
printf("%s: error reading RTC: %x\n", __func__, ret);
|
|
return -1;
|
|
}
|
|
tmp->tm_sec = bcd2bin( buf[RV3029C2_W_SECONDS] & 0x7f);
|
|
tmp->tm_min = bcd2bin( buf[RV3029C2_W_MINUTES] & 0x7f);
|
|
if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_12_24) {
|
|
/* 12h format */
|
|
tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x1f);
|
|
if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_PM)
|
|
/* PM flag set */
|
|
tmp->tm_hour += 12;
|
|
} else
|
|
tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x3f);
|
|
|
|
tmp->tm_mday = bcd2bin( buf[RV3029C2_W_DATE] & 0x3F );
|
|
tmp->tm_mon = bcd2bin( buf[RV3029C2_W_MONTHS] & 0x1F );
|
|
tmp->tm_wday = bcd2bin( buf[RV3029C2_W_DAYS] & 0x07 );
|
|
/* RTC supports only years > 1999 */
|
|
tmp->tm_year = bcd2bin( buf[RV3029C2_W_YEARS]) + 2000;
|
|
tmp->tm_yday = 0;
|
|
tmp->tm_isdst = 0;
|
|
|
|
#ifdef RTC_DEBUG
|
|
printf( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec );
|
|
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int rtc_set( struct rtc_time *tmp )
|
|
{
|
|
int ret;
|
|
unsigned char buf[RTC_RV3029_PAGE_LEN];
|
|
#ifdef RTC_DEBUG
|
|
printf( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
|
#endif
|
|
|
|
if (tmp->tm_year < 2000) {
|
|
printf("RTC: year %d < 2000 not possible\n", tmp->tm_year);
|
|
return -1;
|
|
}
|
|
buf[RV3029C2_W_SECONDS] = bin2bcd(tmp->tm_sec);
|
|
buf[RV3029C2_W_MINUTES] = bin2bcd(tmp->tm_min);
|
|
buf[RV3029C2_W_HOURS] = bin2bcd(tmp->tm_hour);
|
|
/* set 24h format */
|
|
buf[RV3029C2_W_HOURS] &= ~RV3029C2_REG_HR_12_24;
|
|
buf[RV3029C2_W_DATE] = bin2bcd(tmp->tm_mday);
|
|
buf[RV3029C2_W_DAYS] = bin2bcd(tmp->tm_wday);
|
|
buf[RV3029C2_W_MONTHS] = bin2bcd(tmp->tm_mon);
|
|
tmp->tm_year -= 2000;
|
|
buf[RV3029C2_W_YEARS] = bin2bcd(tmp->tm_year);
|
|
ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1,
|
|
buf, RTC_RV3029_PAGE_LEN);
|
|
|
|
/* give the RTC some time to update */
|
|
udelay(1000);
|
|
return 0;
|
|
}
|
|
|
|
void rtc_reset (void)
|
|
{
|
|
int ret;
|
|
unsigned char buf[RTC_RV3029_PAGE_LEN];
|
|
|
|
buf[0] = RTC_RV3029_CTRL_SYS_R;
|
|
ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_RESET, 1,
|
|
buf, 1);
|
|
}
|