+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2001-2008
+ * Copyright 2020 NXP
- *
- * 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
*/
/*
* DS1337 Real Time Clock (RTC).
*/
-#include <common.h>
+#include <config.h>
#include <command.h>
+#include <dm.h>
+#include <log.h>
#include <rtc.h>
#include <i2c.h>
-#if defined(CONFIG_CMD_DATE)
-
-/*---------------------------------------------------------------------*/
-#undef DEBUG_RTC
-
-#ifdef DEBUG_RTC
-#define DEBUGR(fmt,args...) printf(fmt ,##args)
-#else
-#define DEBUGR(fmt,args...)
-#endif
-/*---------------------------------------------------------------------*/
-
/*
* RTC register addresses
*/
+#if defined CONFIG_RTC_DS1337
#define RTC_SEC_REG_ADDR 0x0
#define RTC_MIN_REG_ADDR 0x1
#define RTC_HR_REG_ADDR 0x2
#define RTC_YR_REG_ADDR 0x6
#define RTC_CTL_REG_ADDR 0x0e
#define RTC_STAT_REG_ADDR 0x0f
+#define RTC_TC_REG_ADDR 0x10
+#elif defined CONFIG_RTC_DS1388
+#define RTC_SEC_REG_ADDR 0x1
+#define RTC_MIN_REG_ADDR 0x2
+#define RTC_HR_REG_ADDR 0x3
+#define RTC_DAY_REG_ADDR 0x4
+#define RTC_DATE_REG_ADDR 0x5
+#define RTC_MON_REG_ADDR 0x6
+#define RTC_YR_REG_ADDR 0x7
+#define RTC_CTL_REG_ADDR 0x0c
+#define RTC_STAT_REG_ADDR 0x0b
+#define RTC_TC_REG_ADDR 0x0a
+#endif
/*
* RTC control register bits
#define RTC_STAT_BIT_OSF 0x80 /* Oscillator stop flag */
+#if !CONFIG_IS_ENABLED(DM_RTC)
static uchar rtc_read (uchar reg);
static void rtc_write (uchar reg, uchar val);
-static uchar bin2bcd (unsigned int n);
-static unsigned bcd2bin (uchar c);
-
/*
* Get the current time from the RTC
mon_cent = rtc_read (RTC_MON_REG_ADDR);
year = rtc_read (RTC_YR_REG_ADDR);
- DEBUGR ("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
+ /* No century bit, assume year 2000 */
+#ifdef CONFIG_RTC_DS1388
+ mon_cent |= 0x80;
+#endif
+
+ debug("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
"hr: %02x min: %02x sec: %02x control: %02x status: %02x\n",
year, mon_cent, mday, wday, hour, min, sec, control, status);
tmp->tm_yday = 0;
tmp->tm_isdst= 0;
- DEBUGR ("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
+ 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);
/*
* Set the RTC
*/
-void rtc_set (struct rtc_time *tmp)
+int rtc_set (struct rtc_time *tmp)
{
uchar century;
- DEBUGR ("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
+ 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);
rtc_write (RTC_HR_REG_ADDR, bin2bcd (tmp->tm_hour));
rtc_write (RTC_MIN_REG_ADDR, bin2bcd (tmp->tm_min));
rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec));
+
+ return 0;
}
* SQW/INTB* pin and program it for 32,768 Hz output. Note that
* according to the datasheet, turning on the square wave output
* increases the current drain on the backup battery from about
- * 600 nA to 2uA. Define CFG_RTC_DS1337_NOOSC if you wish to turn
+ * 600 nA to 2uA. Define CONFIG_RTC_DS1337_NOOSC if you wish to turn
* off the OSC output.
*/
-#ifdef CFG_RTC_DS1337_NOOSC
+
+#ifdef CONFIG_RTC_DS1337_NOOSC
#define RTC_DS1337_RESET_VAL \
(RTC_CTL_BIT_INTCN | RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2)
#else
#endif
void rtc_reset (void)
{
+#ifdef CONFIG_RTC_DS1337
rtc_write (RTC_CTL_REG_ADDR, RTC_DS1337_RESET_VAL);
+#elif defined CONFIG_RTC_DS1388
+ rtc_write(RTC_CTL_REG_ADDR, 0x0); /* hw default */
+#endif
+#ifdef CONFIG_RTC_DS1339_TCR_VAL
+ rtc_write (RTC_TC_REG_ADDR, CONFIG_RTC_DS1339_TCR_VAL);
+#endif
+#ifdef CONFIG_RTC_DS1388_TCR_VAL
+ rtc_write(RTC_TC_REG_ADDR, CONFIG_RTC_DS1388_TCR_VAL);
+#endif
}
static
uchar rtc_read (uchar reg)
{
- return (i2c_reg_read (CFG_I2C_RTC_ADDR, reg));
+ return (i2c_reg_read (CFG_SYS_I2C_RTC_ADDR, reg));
}
static void rtc_write (uchar reg, uchar val)
{
- i2c_reg_write (CFG_I2C_RTC_ADDR, reg, val);
+ i2c_reg_write (CFG_SYS_I2C_RTC_ADDR, reg, val);
+}
+#else
+static uchar rtc_read(struct udevice *dev, uchar reg)
+{
+ return dm_i2c_reg_read(dev, reg);
}
-static unsigned bcd2bin (uchar n)
+static void rtc_write(struct udevice *dev, uchar reg, uchar val)
{
- return ((((n >> 4) & 0x0F) * 10) + (n & 0x0F));
+ dm_i2c_reg_write(dev, reg, val);
}
-static unsigned char bin2bcd (unsigned int n)
+static int ds1337_rtc_get(struct udevice *dev, struct rtc_time *tmp)
{
- return (((n / 10) << 4) | (n % 10));
+ int rel = 0;
+ uchar sec, min, hour, mday, wday, mon_cent, year, control, status;
+
+ control = rtc_read(dev, RTC_CTL_REG_ADDR);
+ status = rtc_read(dev, RTC_STAT_REG_ADDR);
+ sec = rtc_read(dev, RTC_SEC_REG_ADDR);
+ min = rtc_read(dev, RTC_MIN_REG_ADDR);
+ hour = rtc_read(dev, RTC_HR_REG_ADDR);
+ wday = rtc_read(dev, RTC_DAY_REG_ADDR);
+ mday = rtc_read(dev, RTC_DATE_REG_ADDR);
+ mon_cent = rtc_read(dev, RTC_MON_REG_ADDR);
+ year = rtc_read(dev, RTC_YR_REG_ADDR);
+
+ /* No century bit, assume year 2000 */
+#ifdef CONFIG_RTC_DS1388
+ mon_cent |= 0x80;
+#endif
+
+ debug("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x\n",
+ year, mon_cent, mday, wday);
+ debug("hr: %02x min: %02x sec: %02x control: %02x status: %02x\n",
+ hour, min, sec, control, status);
+
+ if (status & RTC_STAT_BIT_OSF) {
+ printf("### Warning: RTC oscillator has stopped\n");
+ /* clear the OSF flag */
+ rtc_write(dev, RTC_STAT_REG_ADDR,
+ rtc_read(dev, RTC_STAT_REG_ADDR) & ~RTC_STAT_BIT_OSF);
+ rel = -1;
+ }
+
+ tmp->tm_sec = bcd2bin(sec & 0x7F);
+ tmp->tm_min = bcd2bin(min & 0x7F);
+ tmp->tm_hour = bcd2bin(hour & 0x3F);
+ tmp->tm_mday = bcd2bin(mday & 0x3F);
+ tmp->tm_mon = bcd2bin(mon_cent & 0x1F);
+ tmp->tm_year = bcd2bin(year) + ((mon_cent & 0x80) ? 2000 : 1900);
+ tmp->tm_wday = bcd2bin((wday - 1) & 0x07);
+ 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 rel;
+}
+
+static int ds1337_rtc_set(struct udevice *dev, const struct rtc_time *tmp)
+{
+ uchar century;
+
+ 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);
+
+ rtc_write(dev, RTC_YR_REG_ADDR, bin2bcd(tmp->tm_year % 100));
+
+ century = (tmp->tm_year >= 2000) ? 0x80 : 0;
+ rtc_write(dev, RTC_MON_REG_ADDR, bin2bcd(tmp->tm_mon) | century);
+
+ rtc_write(dev, RTC_DAY_REG_ADDR, bin2bcd(tmp->tm_wday + 1));
+ rtc_write(dev, RTC_DATE_REG_ADDR, bin2bcd(tmp->tm_mday));
+ rtc_write(dev, RTC_HR_REG_ADDR, bin2bcd(tmp->tm_hour));
+ rtc_write(dev, RTC_MIN_REG_ADDR, bin2bcd(tmp->tm_min));
+ rtc_write(dev, RTC_SEC_REG_ADDR, bin2bcd(tmp->tm_sec));
+
+ return 0;
+}
+
+#ifdef CONFIG_RTC_DS1337_NOOSC
+ #define RTC_DS1337_RESET_VAL \
+ (RTC_CTL_BIT_INTCN | RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2)
+#else
+ #define RTC_DS1337_RESET_VAL (RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2)
+#endif
+static int ds1337_rtc_reset(struct udevice *dev)
+{
+#ifdef CONFIG_RTC_DS1337
+ rtc_write(dev, RTC_CTL_REG_ADDR, RTC_DS1337_RESET_VAL);
+#elif defined CONFIG_RTC_DS1388
+ rtc_write(dev, RTC_CTL_REG_ADDR, 0x0); /* hw default */
+#endif
+#ifdef CONFIG_RTC_DS1339_TCR_VAL
+ rtc_write(dev, RTC_TC_REG_ADDR, CONFIG_RTC_DS1339_TCR_VAL);
+#endif
+#ifdef CONFIG_RTC_DS1388_TCR_VAL
+ rtc_write(dev, RTC_TC_REG_ADDR, CONFIG_RTC_DS1388_TCR_VAL);
+#endif
+ return 0;
}
+static const struct rtc_ops ds1337_rtc_ops = {
+ .get = ds1337_rtc_get,
+ .set = ds1337_rtc_set,
+ .reset = ds1337_rtc_reset,
+};
+
+static const struct udevice_id ds1337_rtc_ids[] = {
+ { .compatible = "ds1337" },
+ { .compatible = "ds1338" },
+ { .compatible = "ds1339" },
+ { }
+};
+
+U_BOOT_DRIVER(rtc_ds1337) = {
+ .name = "rtc-ds1337",
+ .id = UCLASS_RTC,
+ .of_match = ds1337_rtc_ids,
+ .ops = &ds1337_rtc_ops,
+};
#endif
projects / J-u-boot.git / blobdiff