X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=drivers%2Frtc%2Fds3231.c;h=eb5ce73a7613f0b22f5a13699a21b77fcc92a4cf;hb=2f02845817bec0dd0f89eb0d829b17b40d005afc;hp=fe11b869f55ac1aa384864a2ab29a00919639680;hpb=9caeaadf508cd0e11ac5dfc56ab0f72e3b89a105;p=oweals%2Fu-boot.git diff --git a/drivers/rtc/ds3231.c b/drivers/rtc/ds3231.c index fe11b869f5..eb5ce73a76 100644 --- a/drivers/rtc/ds3231.c +++ b/drivers/rtc/ds3231.c @@ -1,24 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2006 * Markus Klotzbuecher, mk@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 + * (C) Copyright 2019 NXP + * Chuanhua Han */ /* @@ -30,21 +16,10 @@ #include #include +#include #include #include -#if defined(CONFIG_RTC_DS3231) && 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 */ @@ -75,19 +50,21 @@ #define RTC_STAT_BIT_A1F 0x1 /* Alarm 1 flag */ #define RTC_STAT_BIT_A2F 0x2 /* Alarm 2 flag */ #define RTC_STAT_BIT_OSF 0x80 /* Oscillator stop flag */ +#define RTC_STAT_BIT_BB32KHZ 0x40 /* Battery backed 32KHz Output */ +#define RTC_STAT_BIT_EN32KHZ 0x8 /* Enable 32KHz Output */ +#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 */ -void rtc_get (struct rtc_time *tmp) +int rtc_get (struct rtc_time *tmp) { + int rel = 0; uchar sec, min, hour, mday, wday, mon_cent, year, control, status; control = rtc_read (RTC_CTL_REG_ADDR); @@ -100,7 +77,7 @@ void rtc_get (struct rtc_time *tmp) 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 " + 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); @@ -109,6 +86,7 @@ void rtc_get (struct rtc_time *tmp) /* clear the OSF flag */ rtc_write (RTC_STAT_REG_ADDR, rtc_read (RTC_STAT_REG_ADDR) & ~RTC_STAT_BIT_OSF); + rel = -1; } tmp->tm_sec = bcd2bin (sec & 0x7F); @@ -121,20 +99,22 @@ void rtc_get (struct rtc_time *tmp) 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); + + return rel; } /* * 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); @@ -148,6 +128,8 @@ void rtc_set (struct rtc_time *tmp) 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; } @@ -163,6 +145,16 @@ void rtc_reset (void) rtc_write (RTC_CTL_REG_ADDR, RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2); } +/* + * Enable 32KHz output + */ +#ifdef CONFIG_RTC_ENABLE_32KHZ_OUTPUT +void rtc_enable_32khz_output(void) +{ + rtc_write(RTC_STAT_REG_ADDR, + RTC_STAT_BIT_BB32KHZ | RTC_STAT_BIT_EN32KHZ); +} +#endif /* * Helper functions @@ -171,23 +163,129 @@ void rtc_reset (void) static uchar rtc_read (uchar reg) { - return (i2c_reg_read (CFG_I2C_RTC_ADDR, reg)); + return (i2c_reg_read (CONFIG_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 (CONFIG_SYS_I2C_RTC_ADDR, reg, val); } +#else +static int ds3231_rtc_get(struct udevice *dev, struct rtc_time *tmp) +{ + uchar sec, min, hour, mday, wday, mon_cent, year, status; + + status = dm_i2c_reg_read(dev, RTC_STAT_REG_ADDR); + sec = dm_i2c_reg_read(dev, RTC_SEC_REG_ADDR); + min = dm_i2c_reg_read(dev, RTC_MIN_REG_ADDR); + hour = dm_i2c_reg_read(dev, RTC_HR_REG_ADDR); + wday = dm_i2c_reg_read(dev, RTC_DAY_REG_ADDR); + mday = dm_i2c_reg_read(dev, RTC_DATE_REG_ADDR); + mon_cent = dm_i2c_reg_read(dev, RTC_MON_REG_ADDR); + year = dm_i2c_reg_read(dev, RTC_YR_REG_ADDR); -static unsigned bcd2bin (uchar n) + if (status & RTC_STAT_BIT_OSF) { + printf("### Warning: RTC oscillator has stopped\n"); + /* clear the OSF flag */ + dm_i2c_reg_write(dev, RTC_STAT_REG_ADDR, + dm_i2c_reg_read(dev, RTC_STAT_REG_ADDR) + & ~RTC_STAT_BIT_OSF); + return -EINVAL; + } + + 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 0; +} + +static int ds3231_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); + + dm_i2c_reg_write(dev, RTC_YR_REG_ADDR, bin2bcd(tmp->tm_year % 100)); + + century = (tmp->tm_year >= 2000) ? 0x80 : 0; + dm_i2c_reg_write(dev, RTC_MON_REG_ADDR, bin2bcd(tmp->tm_mon) | century); + + dm_i2c_reg_write(dev, RTC_DAY_REG_ADDR, bin2bcd(tmp->tm_wday + 1)); + dm_i2c_reg_write(dev, RTC_DATE_REG_ADDR, bin2bcd(tmp->tm_mday)); + dm_i2c_reg_write(dev, RTC_HR_REG_ADDR, bin2bcd(tmp->tm_hour)); + dm_i2c_reg_write(dev, RTC_MIN_REG_ADDR, bin2bcd(tmp->tm_min)); + dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR, bin2bcd(tmp->tm_sec)); + + return 0; +} + +static int ds3231_rtc_reset(struct udevice *dev) { - return ((((n >> 4) & 0x0F) * 10) + (n & 0x0F)); + int ret; + + ret = dm_i2c_reg_write(dev, RTC_CTL_REG_ADDR, + RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2); + if (ret < 0) + return ret; + + return 0; } -static unsigned char bin2bcd (unsigned int n) +static int ds3231_probe(struct udevice *dev) { - return (((n / 10) << 4) | (n % 10)); + i2c_set_chip_flags(dev, DM_I2C_CHIP_RD_ADDRESS | + DM_I2C_CHIP_WR_ADDRESS); + + return 0; } +#ifdef CONFIG_RTC_ENABLE_32KHZ_OUTPUT +int rtc_enable_32khz_output(int busnum, int chip_addr) +{ + int ret; + struct udevice *dev; + + ret = i2c_get_chip_for_busnum(busnum, chip_addr, 1, &dev); + if (!ret) { + ret = dm_i2c_reg_write(dev, RTC_STAT_REG_ADDR, + RTC_STAT_BIT_BB32KHZ | + RTC_STAT_BIT_EN32KHZ); + } + return ret; +} +#endif + +static const struct rtc_ops ds3231_rtc_ops = { + .get = ds3231_rtc_get, + .set = ds3231_rtc_set, + .reset = ds3231_rtc_reset, +}; + +static const struct udevice_id ds3231_rtc_ids[] = { + { .compatible = "dallas,ds3231" }, + { .compatible = "dallas,ds3232" }, + { } +}; + +U_BOOT_DRIVER(rtc_ds3231) = { + .name = "rtc-ds3231", + .id = UCLASS_RTC, + .probe = ds3231_probe, + .of_match = ds3231_rtc_ids, + .ops = &ds3231_rtc_ops, +}; #endif