2 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
3 * Andreas Heppel <aheppel@sysgo.de>
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 MK48T59 RTC
36 #if defined(CONFIG_BAB7xx)
38 static uchar rtc_read (short reg)
40 out8(RTC_PORT_ADDR0, reg & 0xFF);
41 out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
42 return in8(RTC_PORT_DATA);
45 static void rtc_write (short reg, uchar val)
47 out8(RTC_PORT_ADDR0, reg & 0xFF);
48 out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
49 out8(RTC_PORT_DATA, val);
52 #elif defined(CONFIG_EVAL5200)
54 static uchar rtc_read (short reg)
59 static void rtc_write (short reg, uchar val)
65 # error Board specific rtc access functions should be supplied
68 /* ------------------------------------------------------------------------- */
70 void *nvram_read(void *dest, const short src, size_t count)
72 uchar *d = (uchar *) dest;
81 void nvram_write(short dest, const void *src, size_t count)
84 uchar *s = (uchar *) src;
90 #if defined(CONFIG_CMD_DATE)
92 /* ------------------------------------------------------------------------- */
94 int rtc_get (struct rtc_time *tmp)
97 uchar sec, min, hour, mday, wday, mon, year;
99 /* Simple: freeze the clock, read it and allow updates again */
100 save_ctrl_a = rtc_read(RTC_CONTROLA);
102 /* Set the register to read the value. */
103 save_ctrl_a |= RTC_CA_READ;
104 rtc_write(RTC_CONTROLA, save_ctrl_a);
106 sec = rtc_read (RTC_SECONDS);
107 min = rtc_read (RTC_MINUTES);
108 hour = rtc_read (RTC_HOURS);
109 mday = rtc_read (RTC_DAY_OF_MONTH);
110 wday = rtc_read (RTC_DAY_OF_WEEK);
111 mon = rtc_read (RTC_MONTH);
112 year = rtc_read (RTC_YEAR);
114 /* re-enable update */
115 save_ctrl_a &= ~RTC_CA_READ;
116 rtc_write(RTC_CONTROLA, save_ctrl_a);
119 printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
120 "hr: %02x min: %02x sec: %02x\n",
121 year, mon, mday, wday,
124 tmp->tm_sec = bcd2bin (sec & 0x7F);
125 tmp->tm_min = bcd2bin (min & 0x7F);
126 tmp->tm_hour = bcd2bin (hour & 0x3F);
127 tmp->tm_mday = bcd2bin (mday & 0x3F);
128 tmp->tm_mon = bcd2bin (mon & 0x1F);
129 tmp->tm_year = bcd2bin (year);
130 tmp->tm_wday = bcd2bin (wday & 0x07);
138 printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
139 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
140 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
146 int rtc_set (struct rtc_time *tmp)
151 printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
152 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
153 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
155 save_ctrl_a = rtc_read(RTC_CONTROLA);
157 save_ctrl_a |= RTC_CA_WRITE;
158 rtc_write(RTC_CONTROLA, save_ctrl_a); /* disables the RTC to update the regs */
160 rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100));
161 rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon));
163 rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday));
164 rtc_write (RTC_DAY_OF_MONTH, bin2bcd(tmp->tm_mday));
165 rtc_write (RTC_HOURS, bin2bcd(tmp->tm_hour));
166 rtc_write (RTC_MINUTES, bin2bcd(tmp->tm_min ));
167 rtc_write (RTC_SECONDS, bin2bcd(tmp->tm_sec ));
169 save_ctrl_a &= ~RTC_CA_WRITE;
170 rtc_write(RTC_CONTROLA, save_ctrl_a); /* enables the RTC to update the regs */
175 void rtc_reset (void)
180 * Start oscillator here.
182 control_b = rtc_read(RTC_CONTROLB);
184 control_b &= ~RTC_CB_STOP;
185 rtc_write(RTC_CONTROLB, control_b);
188 void rtc_set_watchdog(short multi, short res)
192 wd_value = RTC_WDS | ((multi & 0x1F) << 2) | (res & 0x3);
193 rtc_write(RTC_WATCHDOG, wd_value);