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authorYang Zhang <yang.z.zhang@intel.com>2015-08-28 09:58:54 +0800
committerYang Zhang <yang.z.zhang@intel.com>2015-09-01 12:44:00 +0800
commite44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch)
tree66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/u-boot/drivers/rtc/pcf8563.c
parent9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff)
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/u-boot/drivers/rtc/pcf8563.c')
-rw-r--r--qemu/roms/u-boot/drivers/rtc/pcf8563.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/drivers/rtc/pcf8563.c b/qemu/roms/u-boot/drivers/rtc/pcf8563.c
new file mode 100644
index 000000000..25fa7c5b1
--- /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