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1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
155 lines
3.7 KiB
C
155 lines
3.7 KiB
C
/*
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* (C) Copyright 2003
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* David Müller ELSOFT AG Switzerland. d.mueller@elsoft.ch
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/*
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* Date & Time support for the built-in Samsung S3C24X0 RTC
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*/
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#include <common.h>
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#include <command.h>
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#if (defined(CONFIG_CMD_DATE))
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#include <asm/arch/s3c24x0_cpu.h>
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#include <rtc.h>
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#include <asm/io.h>
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#include <linux/compiler.h>
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typedef enum {
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RTC_ENABLE,
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RTC_DISABLE
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} RTC_ACCESS;
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static inline void SetRTC_Access(RTC_ACCESS a)
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{
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struct s3c24x0_rtc *rtc = s3c24x0_get_base_rtc();
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switch (a) {
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case RTC_ENABLE:
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writeb(readb(&rtc->rtccon) | 0x01, &rtc->rtccon);
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break;
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case RTC_DISABLE:
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writeb(readb(&rtc->rtccon) & ~0x01, &rtc->rtccon);
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break;
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}
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}
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/* ------------------------------------------------------------------------- */
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int rtc_get(struct rtc_time *tmp)
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{
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struct s3c24x0_rtc *rtc = s3c24x0_get_base_rtc();
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uchar sec, min, hour, mday, wday, mon, year;
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__maybe_unused uchar a_sec, a_min, a_hour, a_date,
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a_mon, a_year, a_armed;
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/* enable access to RTC registers */
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SetRTC_Access(RTC_ENABLE);
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/* read RTC registers */
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do {
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sec = readb(&rtc->bcdsec);
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min = readb(&rtc->bcdmin);
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hour = readb(&rtc->bcdhour);
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mday = readb(&rtc->bcddate);
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wday = readb(&rtc->bcdday);
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mon = readb(&rtc->bcdmon);
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year = readb(&rtc->bcdyear);
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} while (sec != readb(&rtc->bcdsec));
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/* read ALARM registers */
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a_sec = readb(&rtc->almsec);
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a_min = readb(&rtc->almmin);
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a_hour = readb(&rtc->almhour);
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a_date = readb(&rtc->almdate);
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a_mon = readb(&rtc->almmon);
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a_year = readb(&rtc->almyear);
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a_armed = readb(&rtc->rtcalm);
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/* disable access to RTC registers */
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SetRTC_Access(RTC_DISABLE);
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#ifdef RTC_DEBUG
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printf("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
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"hr: %02x min: %02x sec: %02x\n",
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year, mon, mday, wday, hour, min, sec);
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printf("Alarms: %02x: year: %02x month: %02x date: %02x hour: "
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"%02x min: %02x sec: %02x\n",
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a_armed, a_year, a_mon, a_date, a_hour, a_min, a_sec);
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#endif
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tmp->tm_sec = bcd2bin(sec & 0x7F);
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tmp->tm_min = bcd2bin(min & 0x7F);
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tmp->tm_hour = bcd2bin(hour & 0x3F);
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tmp->tm_mday = bcd2bin(mday & 0x3F);
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tmp->tm_mon = bcd2bin(mon & 0x1F);
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tmp->tm_year = bcd2bin(year);
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tmp->tm_wday = bcd2bin(wday & 0x07);
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if (tmp->tm_year < 70)
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tmp->tm_year += 2000;
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else
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tmp->tm_year += 1900;
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tmp->tm_yday = 0;
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tmp->tm_isdst = 0;
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#ifdef RTC_DEBUG
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printf("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
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tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
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tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
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#endif
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return 0;
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}
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int rtc_set(struct rtc_time *tmp)
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{
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struct s3c24x0_rtc *rtc = s3c24x0_get_base_rtc();
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uchar sec, min, hour, mday, wday, mon, year;
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#ifdef RTC_DEBUG
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printf("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
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tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
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tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
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#endif
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year = bin2bcd(tmp->tm_year % 100);
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mon = bin2bcd(tmp->tm_mon);
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wday = bin2bcd(tmp->tm_wday);
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mday = bin2bcd(tmp->tm_mday);
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hour = bin2bcd(tmp->tm_hour);
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min = bin2bcd(tmp->tm_min);
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sec = bin2bcd(tmp->tm_sec);
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/* enable access to RTC registers */
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SetRTC_Access(RTC_ENABLE);
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/* write RTC registers */
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writeb(sec, &rtc->bcdsec);
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writeb(min, &rtc->bcdmin);
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writeb(hour, &rtc->bcdhour);
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writeb(mday, &rtc->bcddate);
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writeb(wday, &rtc->bcdday);
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writeb(mon, &rtc->bcdmon);
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writeb(year, &rtc->bcdyear);
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/* disable access to RTC registers */
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SetRTC_Access(RTC_DISABLE);
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return 0;
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}
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void rtc_reset(void)
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{
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struct s3c24x0_rtc *rtc = s3c24x0_get_base_rtc();
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writeb((readb(&rtc->rtccon) & ~0x06) | 0x08, &rtc->rtccon);
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writeb(readb(&rtc->rtccon) & ~(0x08 | 0x01), &rtc->rtccon);
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}
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#endif
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