Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / rtc / mvrtc.c

diff --git a/qemu/roms/u-boot/drivers/rtc/mvrtc.c b/qemu/roms/u-boot/drivers/rtc/mvrtc.c
new file mode 100644 (file)
index 0000000..97dadd0
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/rtc/mvrtc.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2011
+ * Jason Cooper <u-boot@lakedaemon.net>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * Date & Time support for Marvell Integrated RTC
+ */
+
+#include <common.h>
+#include <command.h>
+#include <rtc.h>
+#include <asm/io.h>
+#include "mvrtc.h"
+
+/* This RTC does not support century, so we assume 20 */
+#define CENTURY 20
+
+int rtc_get(struct rtc_time *t)
+{
+       u32 time;
+       u32 date;
+       struct mvrtc_registers *mvrtc_regs;
+
+       mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
+
+       /* read the time register */
+       time = readl(&mvrtc_regs->time);
+
+       /* read the date register */
+       date = readl(&mvrtc_regs->date);
+
+       /* test for 12 hour clock (can't tell if it's am/pm) */
+       if (time & MVRTC_HRFMT_MSK) {
+               printf("Error: RTC in 12 hour mode, can't determine AM/PM.\n");
+               return -1;
+       }
+
+       /* time */
+       t->tm_sec  = bcd2bin((time >> MVRTC_SEC_SFT)  & MVRTC_SEC_MSK);
+       t->tm_min  = bcd2bin((time >> MVRTC_MIN_SFT)  & MVRTC_MIN_MSK);
+       t->tm_hour = bcd2bin((time >> MVRTC_HOUR_SFT) & MVRTC_HOUR_MSK);
+       t->tm_wday = bcd2bin((time >> MVRTC_DAY_SFT)  & MVRTC_DAY_MSK);
+       t->tm_wday--;
+
+       /* date */
+       t->tm_mday = bcd2bin((date >> MVRTC_DATE_SFT) & MVRTC_DATE_MSK);
+       t->tm_mon  = bcd2bin((date >> MVRTC_MON_SFT)  & MVRTC_MON_MSK);
+       t->tm_year = bcd2bin((date >> MVRTC_YEAR_SFT) & MVRTC_YEAR_MSK);
+       t->tm_year += CENTURY * 100;
+
+       /* not supported in this RTC */
+       t->tm_yday  = 0;
+       t->tm_isdst = 0;
+
+       return 0;
+}
+
+int rtc_set(struct rtc_time *t)
+{
+       u32 time = 0; /* sets hour format bit to zero, 24hr format. */
+       u32 date = 0;
+       struct mvrtc_registers *mvrtc_regs;
+
+       mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
+
+       /* check that this code isn't 80+ years old ;-) */
+       if ((t->tm_year / 100) != CENTURY)
+               printf("Warning: Only century %d supported.\n", CENTURY);
+
+       /* time */
+       time |= (bin2bcd(t->tm_sec)      & MVRTC_SEC_MSK)  << MVRTC_SEC_SFT;
+       time |= (bin2bcd(t->tm_min)      & MVRTC_MIN_MSK)  << MVRTC_MIN_SFT;
+       time |= (bin2bcd(t->tm_hour)     & MVRTC_HOUR_MSK) << MVRTC_HOUR_SFT;
+       time |= (bin2bcd(t->tm_wday + 1) & MVRTC_DAY_MSK)  << MVRTC_DAY_SFT;
+
+       /* date */
+       date |= (bin2bcd(t->tm_mday)       & MVRTC_DATE_MSK) << MVRTC_DATE_SFT;
+       date |= (bin2bcd(t->tm_mon)        & MVRTC_MON_MSK)  << MVRTC_MON_SFT;
+       date |= (bin2bcd(t->tm_year % 100) & MVRTC_YEAR_MSK) << MVRTC_YEAR_SFT;
+
+       /* write the time register */
+       writel(time, &mvrtc_regs->time);
+
+       /* write the date register */
+       writel(date, &mvrtc_regs->date);
+
+       return 0;
+}
+
+void rtc_reset(void)
+{
+       u32 time;
+       u32 sec;
+       struct mvrtc_registers *mvrtc_regs;
+
+       mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
+
+       /* no init routine for this RTC needed, just check that it's working */
+       time = readl(&mvrtc_regs->time);
+       sec  = bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK);
+       udelay(1000000);
+       time = readl(&mvrtc_regs->time);
+
+       if (sec == bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK))
+               printf("Error: RTC did not increment.\n");
+}