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_CMD_DATE))
33 #if defined(CONFIG_S3C2400)
35 #elif defined(CONFIG_S3C2410)
49 static inline void SetRTC_Access(RTC_ACCESS a)
51 S3C24X0_RTC * const rtc = S3C24X0_GetBase_RTC();
54 rtc->RTCCON |= 0x01; break;
57 rtc->RTCCON &= ~0x01; break;
61 /* ------------------------------------------------------------------------- */
63 int rtc_get (struct rtc_time *tmp)
65 S3C24X0_RTC * const rtc = S3C24X0_GetBase_RTC();
66 uchar sec, min, hour, mday, wday, mon, year;
67 uchar a_sec,a_min, a_hour, a_date, a_mon, a_year, a_armed;
69 /* enable access to RTC registers */
70 SetRTC_Access(RTC_ENABLE);
72 /* read RTC registers */
81 } while (sec != rtc->BCDSEC);
83 /* read ALARM registers */
86 a_hour = rtc->ALMHOUR;
87 a_date = rtc->ALMDATE;
89 a_year = rtc->ALMYEAR;
90 a_armed = rtc->RTCALM;
92 /* disable access to RTC registers */
93 SetRTC_Access(RTC_DISABLE);
96 printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
97 "hr: %02x min: %02x sec: %02x\n",
98 year, mon, mday, wday,
100 printf ( "Alarms: %02x: year: %02x month: %02x date: %02x hour: %02x min: %02x sec: %02x\n",
102 a_year, a_mon, a_date,
103 a_hour, a_min, a_sec);
106 tmp->tm_sec = bcd2bin(sec & 0x7F);
107 tmp->tm_min = bcd2bin(min & 0x7F);
108 tmp->tm_hour = bcd2bin(hour & 0x3F);
109 tmp->tm_mday = bcd2bin(mday & 0x3F);
110 tmp->tm_mon = bcd2bin(mon & 0x1F);
111 tmp->tm_year = bcd2bin(year);
112 tmp->tm_wday = bcd2bin(wday & 0x07);
120 printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
121 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
122 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
128 int rtc_set (struct rtc_time *tmp)
130 S3C24X0_RTC * const rtc = S3C24X0_GetBase_RTC();
131 uchar sec, min, hour, mday, wday, mon, year;
134 printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
135 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
136 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
138 year = bin2bcd(tmp->tm_year % 100);
139 mon = bin2bcd(tmp->tm_mon);
140 wday = bin2bcd(tmp->tm_wday);
141 mday = bin2bcd(tmp->tm_mday);
142 hour = bin2bcd(tmp->tm_hour);
143 min = bin2bcd(tmp->tm_min);
144 sec = bin2bcd(tmp->tm_sec);
146 /* enable access to RTC registers */
147 SetRTC_Access(RTC_ENABLE);
149 /* write RTC registers */
158 /* disable access to RTC registers */
159 SetRTC_Access(RTC_DISABLE);
164 void rtc_reset (void)
166 S3C24X0_RTC * const rtc = S3C24X0_GetBase_RTC();
168 rtc->RTCCON = (rtc->RTCCON & ~0x06) | 0x08;
169 rtc->RTCCON &= ~(0x08|0x01);