Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / rtc / pcf8563.c

diff --git a/qemu/roms/u-boot/drivers/rtc/pcf8563.c b/qemu/roms/u-boot/drivers/rtc/pcf8563.c
new file mode 100644 (file)
index 0000000..25fa7c5
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/rtc/pcf8563.c
@@ -0,0 +1,122 @@
+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * Date & Time support for Philips PCF8563 RTC
+ */
+
+/* #define     DEBUG   */
+
+#include <common.h>
+#include <command.h>
+#include <rtc.h>
+#include <i2c.h>
+
+#if defined(CONFIG_CMD_DATE)
+
+static uchar rtc_read  (uchar reg);
+static void  rtc_write (uchar reg, uchar val);
+
+/* ------------------------------------------------------------------------- */
+
+int rtc_get (struct rtc_time *tmp)
+{
+       int rel = 0;
+       uchar sec, min, hour, mday, wday, mon_cent, year;
+
+       sec     = rtc_read (0x02);
+       min     = rtc_read (0x03);
+       hour    = rtc_read (0x04);
+       mday    = rtc_read (0x05);
+       wday    = rtc_read (0x06);
+       mon_cent= rtc_read (0x07);
+       year    = rtc_read (0x08);
+
+       debug ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
+               "hr: %02x min: %02x sec: %02x\n",
+               year, mon_cent, mday, wday,
+               hour, min, sec );
+       debug ( "Alarms: wday: %02x day: %02x hour: %02x min: %02x\n",
+               rtc_read (0x0C),
+               rtc_read (0x0B),
+               rtc_read (0x0A),
+               rtc_read (0x09) );
+
+       if (sec & 0x80) {
+               puts ("### Warning: RTC Low Voltage - date/time not reliable\n");
+               rel = -1;
+       }
+
+       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_cent & 0x1F);
+       tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 1900 : 2000);
+       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 rel;
+}
+
+int rtc_set (struct rtc_time *tmp)
+{
+       uchar century;
+
+       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 (0x08, bin2bcd(tmp->tm_year % 100));
+
+       century = (tmp->tm_year >= 2000) ? 0 : 0x80;
+       rtc_write (0x07, bin2bcd(tmp->tm_mon) | century);
+
+       rtc_write (0x06, bin2bcd(tmp->tm_wday));
+       rtc_write (0x05, bin2bcd(tmp->tm_mday));
+       rtc_write (0x04, bin2bcd(tmp->tm_hour));
+       rtc_write (0x03, bin2bcd(tmp->tm_min ));
+       rtc_write (0x02, bin2bcd(tmp->tm_sec ));
+
+       return 0;
+}
+
+void rtc_reset (void)
+{
+       /* clear all control & status registers */
+       rtc_write (0x00, 0x00);
+       rtc_write (0x01, 0x00);
+       rtc_write (0x0D, 0x00);
+
+       /* clear Voltage Low bit */
+       rtc_write (0x02, rtc_read (0x02) & 0x7F);
+
+       /* reset all alarms */
+       rtc_write (0x09, 0x00);
+       rtc_write (0x0A, 0x00);
+       rtc_write (0x0B, 0x00);
+       rtc_write (0x0C, 0x00);
+}
+
+/* ------------------------------------------------------------------------- */
+
+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);
+}
+
+#endif