diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/rtc/ds1337.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/rtc/ds1337.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/qemu/roms/u-boot/drivers/rtc/ds1337.c b/qemu/roms/u-boot/drivers/rtc/ds1337.c deleted file mode 100644 index dae1b3c5c..000000000 --- a/qemu/roms/u-boot/drivers/rtc/ds1337.c +++ /dev/null @@ -1,195 +0,0 @@ -/* - * (C) Copyright 2001-2008 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * Keith Outwater, keith_outwater@mvis.com` - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -/* - * Date & Time support (no alarms) for Dallas Semiconductor (now Maxim) - * DS1337 Real Time Clock (RTC). - */ - -#include <common.h> -#include <command.h> -#include <rtc.h> -#include <i2c.h> - -#if defined(CONFIG_CMD_DATE) - -/* - * 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_DAY_REG_ADDR 0x3 -#define RTC_DATE_REG_ADDR 0x4 -#define RTC_MON_REG_ADDR 0x5 -#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_CTL_BIT_A1IE 0x1 /* Alarm 1 interrupt enable */ -#define RTC_CTL_BIT_A2IE 0x2 /* Alarm 2 interrupt enable */ -#define RTC_CTL_BIT_INTCN 0x4 /* Interrupt control */ -#define RTC_CTL_BIT_RS1 0x8 /* Rate select 1 */ -#define RTC_CTL_BIT_RS2 0x10 /* Rate select 2 */ -#define RTC_CTL_BIT_DOSC 0x80 /* Disable Oscillator */ - -/* - * RTC status register bits - */ -#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 */ - - -static uchar rtc_read (uchar reg); -static void rtc_write (uchar reg, uchar val); - -/* - * Get the current time from the RTC - */ -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); - status = rtc_read (RTC_STAT_REG_ADDR); - sec = rtc_read (RTC_SEC_REG_ADDR); - min = rtc_read (RTC_MIN_REG_ADDR); - hour = rtc_read (RTC_HR_REG_ADDR); - wday = rtc_read (RTC_DAY_REG_ADDR); - mday = rtc_read (RTC_DATE_REG_ADDR); - mon_cent = rtc_read (RTC_MON_REG_ADDR); - year = rtc_read (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 " - "hr: %02x min: %02x sec: %02x control: %02x status: %02x\n", - year, mon_cent, mday, wday, hour, min, sec, control, status); - - if (status & RTC_STAT_BIT_OSF) { - printf ("### Warning: RTC oscillator has stopped\n"); - /* 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); - 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; -} - - -/* - * Set the RTC - */ -int rtc_set (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 (RTC_YR_REG_ADDR, bin2bcd (tmp->tm_year % 100)); - - century = (tmp->tm_year >= 2000) ? 0x80 : 0; - rtc_write (RTC_MON_REG_ADDR, bin2bcd (tmp->tm_mon) | century); - - rtc_write (RTC_DAY_REG_ADDR, bin2bcd (tmp->tm_wday + 1)); - rtc_write (RTC_DATE_REG_ADDR, bin2bcd (tmp->tm_mday)); - 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; -} - - -/* - * Reset the RTC. We also enable the oscillator output on the - * 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 CONFIG_SYS_RTC_DS1337_NOOSC if you wish to turn - * off the OSC output. - */ - -#ifdef CONFIG_SYS_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 -void rtc_reset (void) -{ -#ifdef CONFIG_SYS_RTC_DS1337 - rtc_write (RTC_CTL_REG_ADDR, RTC_DS1337_RESET_VAL); -#elif defined CONFIG_SYS_RTC_DS1388 - rtc_write(RTC_CTL_REG_ADDR, 0x0); /* hw default */ -#endif -#ifdef CONFIG_SYS_DS1339_TCR_VAL - rtc_write (RTC_TC_REG_ADDR, CONFIG_SYS_DS1339_TCR_VAL); -#endif -#ifdef CONFIG_SYS_DS1388_TCR_VAL - rtc_write(RTC_TC_REG_ADDR, CONFIG_SYS_DS1388_TCR_VAL); -#endif -} - - -/* - * Helper functions - */ - -static -uchar rtc_read (uchar reg) -{ - return (i2c_reg_read (CONFIG_SYS_I2C_RTC_ADDR, reg)); -} - - -static void rtc_write (uchar reg, uchar val) -{ - i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val); -} - -#endif |