GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ */
+
+#include <common.h>
+
+#include <command.h>
+#include <rtc.h>
+#include <asm/immap.h>
+#include <asm/rtc.h>
+
+#undef RTC_DEBUG
+
+#ifndef CONFIG_SYS_MCFRTC_BASE
+#error RTC_BASE is not defined!
+#endif
+
+#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
+#define	STARTOFTIME		1970
+
+int rtc_get(struct rtc_time *tmp)
+{
+	volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);
+
+	int rtc_days, rtc_hrs, rtc_mins;
+	int tim;
+
+	rtc_days = rtc->days;
+	rtc_hrs = rtc->hourmin >> 8;
+	rtc_mins = RTC_HOURMIN_MINUTES(rtc->hourmin);
+
+	tim = (rtc_days * 24) + rtc_hrs;
+	tim = (tim * 60) + rtc_mins;
+	tim = (tim * 60) + rtc->seconds;
+
+	rtc_to_tm(tim, tmp);
+
+	tmp->tm_yday = 0;
+	tmp->tm_isdst = 0;
+
+#ifdef RTC_DEBUG
+	printf("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);
+#endif
+
+	return 0;
+}
+
+int rtc_set(struct rtc_time *tmp)
+{
+	volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);
+
+	static int month_days[12] = {
+		31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+	};
+	int days, i, months;
+
+	if (tmp->tm_year > 2037) {
+		printf("Unable to handle. Exceeding integer limitation!\n");
+		tmp->tm_year = 2027;
+	}
+#ifdef RTC_DEBUG
+	printf("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);
+#endif
+
+	/* calculate days by years */
+	for (i = STARTOFTIME, days = 0; i < tmp->tm_year; i++) {
+		days += 365 + isleap(i);
+	}
+
+	/* calculate days by months */
+	months = tmp->tm_mon - 1;
+	for (i = 0; i < months; i++) {
+		days += month_days[i];
+
+		if (i == 1)
+			days += isleap(i);
+	}
+
+	days += tmp->tm_mday - 1;
+
+	rtc->days = days;
+	rtc->hourmin = (tmp->tm_hour << 8) | tmp->tm_min;
+	rtc->seconds = tmp->tm_sec;
+
+	return 0;
+}
+
+void rtc_reset(void)
+{
+	volatile rtc_t *rtc = (rtc_t *) (CONFIG_SYS_MCFRTC_BASE);
+
+	if ((rtc->cr & RTC_CR_EN) == 0) {
+		printf("real-time-clock was stopped. Now starting...\n");
+		rtc->cr |= RTC_CR_EN;
+	}
+
+	rtc->cr |= RTC_CR_SWR;
+}