mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
b633741bcd
Fix: rv3029.c: In function 'rtc_set': rv3029.c:98:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable] rv3029.c: In function 'set_eere_bit': rv3029.c:131:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable] rv3029.c: In function 'wait_eebusy': rv3029.c:149:9: warning: variable 'ret' set but not used [-Wunused-but-set-variable] rv3029.c: In function 'rtc_reset': rv3029.c:165:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable] Signed-off-by: Wolfgang Denk <wd@denx.de>
206 lines
5.9 KiB
C
206 lines
5.9 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_CTRL1 0x00
|
|
#define RTC_RV3029_CTRL1_EERE (1 << 3)
|
|
|
|
#define RTC_RV3029_CTRL_STATUS 0x03
|
|
#define RTC_RV3029_CTRLS_EEBUSY (1 << 7)
|
|
|
|
#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 */
|
|
|
|
#define RTC_RV3029_EEPROM_CTRL 0x30
|
|
#define RTC_RV3029_TRICKLE_1K (1 << 4)
|
|
#define RTC_RV3029_TRICKLE_5K (1 << 5)
|
|
#define RTC_RV3029_TRICKLE_20K (1 << 6)
|
|
#define RTC_RV3029_TRICKLE_80K (1 << 7)
|
|
|
|
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;
|
|
|
|
debug( "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 );
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtc_set( struct rtc_time *tmp )
|
|
{
|
|
int ret;
|
|
unsigned char buf[RTC_RV3029_PAGE_LEN];
|
|
|
|
debug( "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);
|
|
|
|
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 ret;
|
|
}
|
|
|
|
/* sets EERE-Bit (automatic EEPROM refresh) */
|
|
static void set_eere_bit(int state)
|
|
{
|
|
unsigned char reg_ctrl1;
|
|
|
|
(void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL1, 1,
|
|
®_ctrl1, 1);
|
|
|
|
if (state)
|
|
reg_ctrl1 |= RTC_RV3029_CTRL1_EERE;
|
|
else
|
|
reg_ctrl1 &= (~RTC_RV3029_CTRL1_EERE);
|
|
|
|
(void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL1, 1,
|
|
®_ctrl1, 1);
|
|
}
|
|
|
|
/* waits until EEPROM page is no longer busy (times out after 10ms*loops) */
|
|
static int wait_eebusy(int loops)
|
|
{
|
|
int i;
|
|
unsigned char ctrl_status;
|
|
|
|
for (i = 0; i < loops; i++) {
|
|
(void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_STATUS,
|
|
1, &ctrl_status, 1);
|
|
|
|
if ((ctrl_status & RTC_RV3029_CTRLS_EEBUSY) == 0)
|
|
break;
|
|
udelay(10000);
|
|
}
|
|
return i;
|
|
}
|
|
|
|
void rtc_reset (void)
|
|
{
|
|
unsigned char buf[RTC_RV3029_PAGE_LEN];
|
|
|
|
buf[0] = RTC_RV3029_CTRL_SYS_R;
|
|
(void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_RESET, 1,
|
|
buf, 1);
|
|
|
|
#if defined(CONFIG_SYS_RV3029_TCR)
|
|
/*
|
|
* because EEPROM_CTRL register is in EEPROM page it is necessary to
|
|
* disable automatic EEPROM refresh and check if EEPROM is busy
|
|
* before EEPORM_CTRL register may be accessed
|
|
*/
|
|
set_eere_bit(0);
|
|
wait_eebusy(100);
|
|
/* read current trickle charger setting */
|
|
(void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_EEPROM_CTRL,
|
|
1, buf, 1);
|
|
/* enable automatic EEPROM refresh again */
|
|
set_eere_bit(1);
|
|
|
|
/*
|
|
* to minimize EEPROM access write trickle charger setting only if it
|
|
* differs from current value
|
|
*/
|
|
if ((buf[0] & 0xF0) != CONFIG_SYS_RV3029_TCR) {
|
|
buf[0] = (buf[0] & 0x0F) | CONFIG_SYS_RV3029_TCR;
|
|
/*
|
|
* write trickle charger setting (disable autom. EEPROM
|
|
* refresh and wait until EEPROM is idle)
|
|
*/
|
|
set_eere_bit(0);
|
|
wait_eebusy(100);
|
|
(void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR,
|
|
RTC_RV3029_EEPROM_CTRL, 1, buf, 1);
|
|
/*
|
|
* it is necessary to wait 10ms before EEBUSY-Bit may be read
|
|
* (this is not documented in the data sheet yet, but the
|
|
* manufacturer recommends it)
|
|
*/
|
|
udelay(10000);
|
|
/* wait until EEPROM write access is finished */
|
|
wait_eebusy(100);
|
|
set_eere_bit(1);
|
|
}
|
|
#endif
|
|
}
|