mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-12 06:06:15 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
154 lines
3.7 KiB
C
154 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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/*
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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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