3 * David Müller ELSOFT AG Switzerland. d.mueller@elsoft.ch
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * Date & Time support for the built-in Samsung S3C24X0 RTC
31 #if defined(CONFIG_RTC_S3C24X0) && (defined(CONFIG_CMD_DATE))
33 #if defined(CONFIG_S3C2400)
35 #elif defined(CONFIG_S3C2410)
37 #elif defined(CONFIG_S3C2440) || defined(CONFIG_S3C2442)
51 static inline void SetRTC_Access(RTC_ACCESS a
)
53 S3C24X0_RTC
* const rtc
= S3C24X0_GetBase_RTC();
56 rtc
->RTCCON
|= 0x01; break;
59 rtc
->RTCCON
&= ~0x01; break;
63 static unsigned bcd2bin (uchar n
)
65 return ((((n
>> 4) & 0x0F) * 10) + (n
& 0x0F));
68 static unsigned char bin2bcd (unsigned int n
)
70 return (((n
/ 10) << 4) | (n
% 10));
73 /* ------------------------------------------------------------------------- */
75 int rtc_get (struct rtc_time
*tmp
)
77 S3C24X0_RTC
* const rtc
= S3C24X0_GetBase_RTC();
78 uchar sec
, min
, hour
, mday
, wday
, mon
, year
;
79 uchar a_sec
,a_min
, a_hour
, a_date
, a_mon
, a_year
, a_armed
;
81 /* enable access to RTC registers */
82 SetRTC_Access(RTC_ENABLE
);
84 /* read RTC registers */
93 } while (sec
!= rtc
->BCDSEC
);
95 /* read ALARM registers */
98 a_hour
= rtc
->ALMHOUR
;
99 a_date
= rtc
->ALMDATE
;
101 a_year
= rtc
->ALMYEAR
;
102 a_armed
= rtc
->RTCALM
;
104 /* disable access to RTC registers */
105 SetRTC_Access(RTC_DISABLE
);
108 printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
109 "hr: %02x min: %02x sec: %02x\n",
110 year
, mon
, mday
, wday
,
112 printf ( "Alarms: %02x: year: %02x month: %02x date: %02x hour: %02x min: %02x sec: %02x\n",
114 a_year
, a_mon
, a_date
,
115 a_hour
, a_min
, a_sec
);
118 tmp
->tm_sec
= bcd2bin(sec
& 0x7F);
119 tmp
->tm_min
= bcd2bin(min
& 0x7F);
120 tmp
->tm_hour
= bcd2bin(hour
& 0x3F);
121 tmp
->tm_mday
= bcd2bin(mday
& 0x3F);
122 tmp
->tm_mon
= bcd2bin(mon
& 0x1F);
123 tmp
->tm_year
= bcd2bin(year
);
124 tmp
->tm_wday
= bcd2bin(wday
& 0x07);
132 printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
133 tmp
->tm_year
, tmp
->tm_mon
, tmp
->tm_mday
, tmp
->tm_wday
,
134 tmp
->tm_hour
, tmp
->tm_min
, tmp
->tm_sec
);
140 void rtc_set (struct rtc_time
*tmp
)
142 S3C24X0_RTC
* const rtc
= S3C24X0_GetBase_RTC();
143 uchar sec
, min
, hour
, mday
, wday
, mon
, year
;
146 printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
147 tmp
->tm_year
, tmp
->tm_mon
, tmp
->tm_mday
, tmp
->tm_wday
,
148 tmp
->tm_hour
, tmp
->tm_min
, tmp
->tm_sec
);
150 year
= bin2bcd(tmp
->tm_year
% 100);
151 mon
= bin2bcd(tmp
->tm_mon
);
152 wday
= bin2bcd(tmp
->tm_wday
);
153 mday
= bin2bcd(tmp
->tm_mday
);
154 hour
= bin2bcd(tmp
->tm_hour
);
155 min
= bin2bcd(tmp
->tm_min
);
156 sec
= bin2bcd(tmp
->tm_sec
);
158 /* enable access to RTC registers */
159 SetRTC_Access(RTC_ENABLE
);
161 /* write RTC registers */
170 /* disable access to RTC registers */
171 SetRTC_Access(RTC_DISABLE
);
174 void rtc_reset (void)
176 S3C24X0_RTC
* const rtc
= S3C24X0_GetBase_RTC();
178 rtc
->RTCCON
= (rtc
->RTCCON
& ~0x06) | 0x08;
179 rtc
->RTCCON
&= ~(0x08|0x01);