Add UI support on the Xbox

[reactos.git] / freeldr / freeldr / arch / i386 / xboxrtc.c

diff --git a/freeldr/freeldr/arch/i386/xboxrtc.c b/freeldr/freeldr/arch/i386/xboxrtc.c
new file mode 100644 (file)
index 0000000..a114998
--- /dev/null
+++ b/freeldr/freeldr/arch/i386/xboxrtc.c
@@ -0,0 +1,85 @@
+/* $Id: xboxrtc.c,v 1.1 2004/11/14 22:04:38 gvg Exp $
+ *
+ *  FreeLoader
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "freeldr.h"
+#include "machine.h"
+#include "machxbox.h"
+#include "portio.h"
+
+#define RTC_REGISTER_A   0x0A
+#define   RTC_REG_A_UIP  0x80  /* Update In Progress bit */
+
+#define BCD_INT(bcd) (((bcd & 0xf0) >> 4) * 10 + (bcd &0x0f))
+
+static UCHAR
+HalpQueryCMOS(UCHAR Reg)
+{
+  UCHAR Val;
+  Reg |= 0x80;
+
+  WRITE_PORT_UCHAR((PUCHAR)0x70, Reg);
+  Val = READ_PORT_UCHAR((PUCHAR)0x71);
+  WRITE_PORT_UCHAR((PUCHAR)0x70, 0);
+
+  return(Val);
+}
+
+VOID
+XboxRTCGetCurrentDateTime(PU32 Year, PU32 Month, PU32 Day, PU32 Hour, PU32 Minute, PU32 Second)
+{
+  while (HalpQueryCMOS (RTC_REGISTER_A) & RTC_REG_A_UIP)
+    {
+      ;
+    }
+
+  if (NULL != Second)
+    {
+      *Second = BCD_INT(HalpQueryCMOS(0));
+    }
+  if (NULL != Minute)
+    {
+      *Minute = BCD_INT(HalpQueryCMOS(2));
+    }
+  if (NULL != Hour)
+    {
+      *Hour = BCD_INT(HalpQueryCMOS(4));
+    }
+  if (NULL != Day)
+    {
+      *Day = BCD_INT(HalpQueryCMOS(7));
+    }
+  if (NULL != Month)
+    {
+      *Month = BCD_INT(HalpQueryCMOS(8));
+    }
+  if (NULL != Year)
+    {
+      *Year = BCD_INT(HalpQueryCMOS(9));
+      if (*Year > 80)
+        {
+          *Year += 1900;
+        }
+      else
+        {
+          *Year += 2000;
+        }
+    }
+}
+
+/* EOF */