diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/rtc/m41t62.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/rtc/m41t62.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/qemu/roms/u-boot/drivers/rtc/m41t62.c b/qemu/roms/u-boot/drivers/rtc/m41t62.c deleted file mode 100644 index 3829bc54e..000000000 --- a/qemu/roms/u-boot/drivers/rtc/m41t62.c +++ /dev/null @@ -1,135 +0,0 @@ -/* - * (C) Copyright 2008 - * Stefan Roese, DENX Software Engineering, sr@denx.de. - * - * based on a the Linux rtc-m41t80.c driver which is: - * Alexander Bigga <ab@mycable.de>, 2006 (c) mycable GmbH - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -/* - * Date & Time support for STMicroelectronics M41T62 - */ - -/* #define DEBUG */ - -#include <common.h> -#include <command.h> -#include <rtc.h> -#include <i2c.h> - -#if defined(CONFIG_CMD_DATE) - -#define M41T62_REG_SSEC 0 -#define M41T62_REG_SEC 1 -#define M41T62_REG_MIN 2 -#define M41T62_REG_HOUR 3 -#define M41T62_REG_WDAY 4 -#define M41T62_REG_DAY 5 -#define M41T62_REG_MON 6 -#define M41T62_REG_YEAR 7 -#define M41T62_REG_ALARM_MON 0xa -#define M41T62_REG_ALARM_DAY 0xb -#define M41T62_REG_ALARM_HOUR 0xc -#define M41T62_REG_ALARM_MIN 0xd -#define M41T62_REG_ALARM_SEC 0xe -#define M41T62_REG_FLAGS 0xf - -#define M41T62_DATETIME_REG_SIZE (M41T62_REG_YEAR + 1) -#define M41T62_ALARM_REG_SIZE \ - (M41T62_REG_ALARM_SEC + 1 - M41T62_REG_ALARM_MON) - -#define M41T62_SEC_ST (1 << 7) /* ST: Stop Bit */ -#define M41T62_ALMON_AFE (1 << 7) /* AFE: AF Enable Bit */ -#define M41T62_ALMON_SQWE (1 << 6) /* SQWE: SQW Enable Bit */ -#define M41T62_ALHOUR_HT (1 << 6) /* HT: Halt Update Bit */ -#define M41T62_FLAGS_AF (1 << 6) /* AF: Alarm Flag Bit */ -#define M41T62_FLAGS_BATT_LOW (1 << 4) /* BL: Battery Low Bit */ - -#define M41T62_FEATURE_HT (1 << 0) -#define M41T62_FEATURE_BL (1 << 1) - -#define M41T80_ALHOUR_HT (1 << 6) /* HT: Halt Update Bit */ - -int rtc_get(struct rtc_time *tm) -{ - u8 buf[M41T62_DATETIME_REG_SIZE]; - - i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE); - - debug("%s: raw read data - sec=%02x, min=%02x, hr=%02x, " - "mday=%02x, mon=%02x, year=%02x, wday=%02x, y2k=%02x\n", - __FUNCTION__, - buf[0], buf[1], buf[2], buf[3], - buf[4], buf[5], buf[6], buf[7]); - - tm->tm_sec = bcd2bin(buf[M41T62_REG_SEC] & 0x7f); - tm->tm_min = bcd2bin(buf[M41T62_REG_MIN] & 0x7f); - tm->tm_hour = bcd2bin(buf[M41T62_REG_HOUR] & 0x3f); - tm->tm_mday = bcd2bin(buf[M41T62_REG_DAY] & 0x3f); - tm->tm_wday = buf[M41T62_REG_WDAY] & 0x07; - tm->tm_mon = bcd2bin(buf[M41T62_REG_MON] & 0x1f); - - /* assume 20YY not 19YY, and ignore the Century Bit */ - /* U-Boot needs to add 1900 here */ - tm->tm_year = bcd2bin(buf[M41T62_REG_YEAR]) + 100 + 1900; - - debug("%s: tm is secs=%d, mins=%d, hours=%d, " - "mday=%d, mon=%d, year=%d, wday=%d\n", - __FUNCTION__, - tm->tm_sec, tm->tm_min, tm->tm_hour, - tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); - - return 0; -} - -int rtc_set(struct rtc_time *tm) -{ - u8 buf[M41T62_DATETIME_REG_SIZE]; - - debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", - tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday, - tm->tm_hour, tm->tm_min, tm->tm_sec); - - i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE); - - /* Merge time-data and register flags into buf[0..7] */ - buf[M41T62_REG_SSEC] = 0; - buf[M41T62_REG_SEC] = - bin2bcd(tm->tm_sec) | (buf[M41T62_REG_SEC] & ~0x7f); - buf[M41T62_REG_MIN] = - bin2bcd(tm->tm_min) | (buf[M41T62_REG_MIN] & ~0x7f); - buf[M41T62_REG_HOUR] = - bin2bcd(tm->tm_hour) | (buf[M41T62_REG_HOUR] & ~0x3f) ; - buf[M41T62_REG_WDAY] = - (tm->tm_wday & 0x07) | (buf[M41T62_REG_WDAY] & ~0x07); - buf[M41T62_REG_DAY] = - bin2bcd(tm->tm_mday) | (buf[M41T62_REG_DAY] & ~0x3f); - buf[M41T62_REG_MON] = - bin2bcd(tm->tm_mon) | (buf[M41T62_REG_MON] & ~0x1f); - /* assume 20YY not 19YY */ - buf[M41T62_REG_YEAR] = bin2bcd(tm->tm_year % 100); - - if (i2c_write(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE)) { - printf("I2C write failed in %s()\n", __func__); - return -1; - } - - return 0; -} - -void rtc_reset(void) -{ - u8 val; - - /* - * M41T82: Make sure HT (Halt Update) bit is cleared. - * This bit is 0 in M41T62 so its save to clear it always. - */ - i2c_read(CONFIG_SYS_I2C_RTC_ADDR, M41T62_REG_ALARM_HOUR, 1, &val, 1); - val &= ~M41T80_ALHOUR_HT; - i2c_write(CONFIG_SYS_I2C_RTC_ADDR, M41T62_REG_ALARM_HOUR, 1, &val, 1); -} - -#endif |