1 /*
2  *  FreeLoader
3  *
4  *  This program is free software; you can redistribute it and/or modify
5  *  it under the terms of the GNU General Public License as published by
6  *  the Free Software Foundation; either version 2 of the License, or
7  *  (at your option) any later version.
8  *
9  *  This program is distributed in the hope that it will be useful,
10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  *  GNU General Public License for more details.
13  *
14  *  You should have received a copy of the GNU General Public License along
15  *  with this program; if not, write to the Free Software Foundation, Inc.,
16  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17  */
18 
19 #include <freeldr.h>
20 
21 #define RTC_REGISTER_A   0x0A
22 #define   RTC_REG_A_UIP  0x80  /* Update In Progress bit */
23 
24 #define BCD_INT(bcd) (((bcd & 0xf0) >> 4) * 10 + (bcd &0x0f))
25 
26 static UCHAR
27 HalpQueryCMOS(UCHAR Reg)
28 {
29   UCHAR Val;
30   Reg |= 0x80;
31 
32   WRITE_PORT_UCHAR((PUCHAR)0x70, Reg);
33   Val = READ_PORT_UCHAR((PUCHAR)0x71);
34   WRITE_PORT_UCHAR((PUCHAR)0x70, 0);
35 
36   return(Val);
37 }
38 
39 TIMEINFO*
40 XboxGetTime(VOID)
41 {
42     static TIMEINFO TimeInfo;
43 
44     while (HalpQueryCMOS (RTC_REGISTER_A) & RTC_REG_A_UIP)
45     {
46         ;
47     }
48 
49     TimeInfo.Second = BCD_INT(HalpQueryCMOS(0));
50     TimeInfo.Minute = BCD_INT(HalpQueryCMOS(2));
51     TimeInfo.Hour = BCD_INT(HalpQueryCMOS(4));
52     TimeInfo.Day = BCD_INT(HalpQueryCMOS(7));
53     TimeInfo.Month = BCD_INT(HalpQueryCMOS(8));
54     TimeInfo.Year = BCD_INT(HalpQueryCMOS(9));
55     if (TimeInfo.Year > 80)
56         TimeInfo.Year += 1900;
57     else
58         TimeInfo.Year += 2000;
59 
60     return &TimeInfo;
61 }
62 
63 /* EOF */
64