Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / rtc / mx27rtc.c

diff --git a/qemu/roms/u-boot/drivers/rtc/mx27rtc.c b/qemu/roms/u-boot/drivers/rtc/mx27rtc.c
new file mode 100644 (file)
index 0000000..ae6595b
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/rtc/mx27rtc.c
@@ -0,0 +1,70 @@
+/*
+ * Freescale i.MX27 RTC Driver
+ *
+ * Copyright (C) 2012 Philippe Reynes <tremyfr@yahoo.fr>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <rtc.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+
+#define HOUR_SHIFT 8
+#define HOUR_MASK  0x1f
+#define MIN_SHIFT  0
+#define MIN_MASK   0x3f
+
+int rtc_get(struct rtc_time *time)
+{
+       struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
+       uint32_t day, hour, min, sec;
+
+       day  = readl(&rtc_regs->dayr);
+       hour = readl(&rtc_regs->hourmin);
+       sec  = readl(&rtc_regs->seconds);
+
+       min  = (hour >> MIN_SHIFT) & MIN_MASK;
+       hour = (hour >> HOUR_SHIFT) & HOUR_MASK;
+
+       sec += min * 60 + hour * 3600 + day * 24 * 3600;
+
+       to_tm(sec, time);
+
+       return 0;
+}
+
+int rtc_set(struct rtc_time *time)
+{
+       struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
+       uint32_t day, hour, min, sec;
+
+       sec = mktime(time->tm_year, time->tm_mon, time->tm_mday,
+               time->tm_hour, time->tm_min, time->tm_sec);
+
+       day  = sec / (24 * 3600);
+       sec  = sec % (24 * 3600);
+       hour = sec / 3600;
+       sec  = sec % 3600;
+       min  = sec / 60;
+       sec  = sec % 60;
+
+       hour  = (hour & HOUR_MASK) << HOUR_SHIFT;
+       hour |= (min & MIN_MASK) << MIN_SHIFT;
+
+       writel(day, &rtc_regs->dayr);
+       writel(hour, &rtc_regs->hourmin);
+       writel(sec, &rtc_regs->seconds);
+
+       return 0;
+}
+
+void rtc_reset(void)
+{
+       struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
+
+       writel(0, &rtc_regs->dayr);
+       writel(0, &rtc_regs->hourmin);
+       writel(0, &rtc_regs->seconds);
+}