Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / rtc / max6900.c

diff --git a/qemu/roms/u-boot/drivers/rtc/max6900.c b/qemu/roms/u-boot/drivers/rtc/max6900.c
new file mode 100644 (file)
index 0000000..48ad0a0
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/rtc/max6900.c
@@ -0,0 +1,109 @@
+/*
+ * (C) Copyright 2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * Date & Time support for MAXIM MAX6900 RTC
+ */
+
+/* #define     DEBUG   */
+
+#include <common.h>
+#include <command.h>
+#include <rtc.h>
+#include <i2c.h>
+
+#if defined(CONFIG_CMD_DATE)
+
+#ifndef        CONFIG_SYS_I2C_RTC_ADDR
+#define        CONFIG_SYS_I2C_RTC_ADDR 0x50
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+static uchar rtc_read (uchar reg)
+{
+       return (i2c_reg_read (CONFIG_SYS_I2C_RTC_ADDR, reg));
+}
+
+static void rtc_write (uchar reg, uchar val)
+{
+       i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val);
+       udelay(2500);
+}
+
+/* ------------------------------------------------------------------------- */
+
+int rtc_get (struct rtc_time *tmp)
+{
+       uchar sec, min, hour, mday, wday, mon, cent, year;
+       int retry = 1;
+
+       do {
+               sec     = rtc_read (0x80);
+               min     = rtc_read (0x82);
+               hour    = rtc_read (0x84);
+               mday    = rtc_read (0x86);
+               mon     = rtc_read (0x88);
+               wday    = rtc_read (0x8a);
+               year    = rtc_read (0x8c);
+               cent    = rtc_read (0x92);
+               /*
+                * Check for seconds rollover
+                */
+               if ((sec != 59) || (rtc_read(0x80) == sec)){
+                       retry = 0;
+               }
+       } while (retry);
+
+       debug ( "Get RTC year: %02x mon: %02x cent: %02x mday: %02x wday: %02x "
+               "hr: %02x min: %02x sec: %02x\n",
+               year, mon, cent, mday, wday,
+               hour, min, sec );
+
+       tmp->tm_sec  = bcd2bin (sec  & 0x7F);
+       tmp->tm_min  = bcd2bin (min  & 0x7F);
+       tmp->tm_hour = bcd2bin (hour & 0x3F);
+       tmp->tm_mday = bcd2bin (mday & 0x3F);
+       tmp->tm_mon  = bcd2bin (mon & 0x1F);
+       tmp->tm_year = bcd2bin (year) + bcd2bin(cent) * 100;
+       tmp->tm_wday = bcd2bin (wday & 0x07);
+       tmp->tm_yday = 0;
+       tmp->tm_isdst= 0;
+
+       debug ( "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);
+
+       return 0;
+}
+
+int rtc_set (struct rtc_time *tmp)
+{
+
+       debug ( "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);
+
+       rtc_write (0x9E, 0x00);
+       rtc_write (0x80, 0);    /* Clear seconds to ensure no rollover */
+       rtc_write (0x92, bin2bcd(tmp->tm_year / 100));
+       rtc_write (0x8c, bin2bcd(tmp->tm_year % 100));
+       rtc_write (0x8a, bin2bcd(tmp->tm_wday));
+       rtc_write (0x88, bin2bcd(tmp->tm_mon));
+       rtc_write (0x86, bin2bcd(tmp->tm_mday));
+       rtc_write (0x84, bin2bcd(tmp->tm_hour));
+       rtc_write (0x82, bin2bcd(tmp->tm_min ));
+       rtc_write (0x80, bin2bcd(tmp->tm_sec ));
+
+       return 0;
+}
+
+void rtc_reset (void)
+{
+}
+
+#endif