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git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/rtc/mk48t59.c
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_RTC_MK48T59)
38 #if defined(CONFIG_BAB7xx)
40 static uchar
rtc_read (short reg
)
42 out8(RTC_PORT_ADDR0
, reg
& 0xFF);
43 out8(RTC_PORT_ADDR1
, (reg
>>8) & 0xFF);
44 return in8(RTC_PORT_DATA
);
47 static void rtc_write (short reg
, uchar val
)
49 out8(RTC_PORT_ADDR0
, reg
& 0xFF);
50 out8(RTC_PORT_ADDR1
, (reg
>>8) & 0xFF);
51 out8(RTC_PORT_DATA
, val
);
54 #elif defined(CONFIG_PCIPPC2)
56 #include "../board/pcippc2/pcippc2.h"
58 static uchar
rtc_read (short reg
)
63 static void rtc_write (short reg
, uchar val
)
68 #elif defined(CONFIG_AMIGAONEG3SE)
70 #include "../board/MAI/AmigaOneG3SE/via686.h"
71 #include "../board/MAI/AmigaOneG3SE/memio.h"
74 static uchar
rtc_read (short reg
)
76 out_byte(CMOS_ADDR
, (uint8
)reg
);
77 return in_byte(CMOS_DATA
);
80 static void rtc_write (short reg
, uchar val
)
82 out_byte(CMOS_ADDR
, (uint8
)reg
);
83 out_byte(CMOS_DATA
, (uint8
)val
);
86 #elif defined(CONFIG_EVAL5200)
88 static uchar
rtc_read (short reg
)
93 static void rtc_write (short reg
, uchar val
)
99 # error Board specific rtc access functions should be supplied
102 static unsigned bcd2bin (uchar n
)
104 return ((((n
>> 4) & 0x0F) * 10) + (n
& 0x0F));
107 static unsigned char bin2bcd (unsigned int n
)
109 return (((n
/ 10) << 4) | (n
% 10));
112 /* ------------------------------------------------------------------------- */
114 void *nvram_read(void *dest
, const short src
, size_t count
)
116 uchar
*d
= (uchar
*) dest
;
120 *d
++ = rtc_read(s
++);
125 void nvram_write(short dest
, const void *src
, size_t count
)
128 uchar
*s
= (uchar
*) src
;
131 rtc_write(d
++, *s
++);
134 #if defined(CONFIG_CMD_DATE)
136 /* ------------------------------------------------------------------------- */
138 void rtc_get (struct rtc_time
*tmp
)
141 uchar sec
, min
, hour
, mday
, wday
, mon
, year
;
143 /* Simple: freeze the clock, read it and allow updates again */
144 save_ctrl_a
= rtc_read(RTC_CONTROLA
);
146 /* Set the register to read the value. */
147 save_ctrl_a
|= RTC_CA_READ
;
148 rtc_write(RTC_CONTROLA
, save_ctrl_a
);
150 sec
= rtc_read (RTC_SECONDS
);
151 min
= rtc_read (RTC_MINUTES
);
152 hour
= rtc_read (RTC_HOURS
);
153 mday
= rtc_read (RTC_DAY_OF_MONTH
);
154 wday
= rtc_read (RTC_DAY_OF_WEEK
);
155 mon
= rtc_read (RTC_MONTH
);
156 year
= rtc_read (RTC_YEAR
);
158 /* re-enable update */
159 save_ctrl_a
&= ~RTC_CA_READ
;
160 rtc_write(RTC_CONTROLA
, save_ctrl_a
);
163 printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
164 "hr: %02x min: %02x sec: %02x\n",
165 year
, mon
, mday
, wday
,
168 tmp
->tm_sec
= bcd2bin (sec
& 0x7F);
169 tmp
->tm_min
= bcd2bin (min
& 0x7F);
170 tmp
->tm_hour
= bcd2bin (hour
& 0x3F);
171 tmp
->tm_mday
= bcd2bin (mday
& 0x3F);
172 tmp
->tm_mon
= bcd2bin (mon
& 0x1F);
173 tmp
->tm_year
= bcd2bin (year
);
174 tmp
->tm_wday
= bcd2bin (wday
& 0x07);
182 printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
183 tmp
->tm_year
, tmp
->tm_mon
, tmp
->tm_mday
, tmp
->tm_wday
,
184 tmp
->tm_hour
, tmp
->tm_min
, tmp
->tm_sec
);
188 void rtc_set (struct rtc_time
*tmp
)
193 printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
194 tmp
->tm_year
, tmp
->tm_mon
, tmp
->tm_mday
, tmp
->tm_wday
,
195 tmp
->tm_hour
, tmp
->tm_min
, tmp
->tm_sec
);
197 save_ctrl_a
= rtc_read(RTC_CONTROLA
);
199 save_ctrl_a
|= RTC_CA_WRITE
;
200 rtc_write(RTC_CONTROLA
, save_ctrl_a
); /* disables the RTC to update the regs */
202 rtc_write (RTC_YEAR
, bin2bcd(tmp
->tm_year
% 100));
203 rtc_write (RTC_MONTH
, bin2bcd(tmp
->tm_mon
));
205 rtc_write (RTC_DAY_OF_WEEK
, bin2bcd(tmp
->tm_wday
));
206 rtc_write (RTC_DAY_OF_MONTH
, bin2bcd(tmp
->tm_mday
));
207 rtc_write (RTC_HOURS
, bin2bcd(tmp
->tm_hour
));
208 rtc_write (RTC_MINUTES
, bin2bcd(tmp
->tm_min
));
209 rtc_write (RTC_SECONDS
, bin2bcd(tmp
->tm_sec
));
211 save_ctrl_a
&= ~RTC_CA_WRITE
;
212 rtc_write(RTC_CONTROLA
, save_ctrl_a
); /* enables the RTC to update the regs */
215 void rtc_reset (void)
220 * Start oscillator here.
222 control_b
= rtc_read(RTC_CONTROLB
);
224 control_b
&= ~RTC_CB_STOP
;
225 rtc_write(RTC_CONTROLB
, control_b
);
228 void rtc_set_watchdog(short multi
, short res
)
232 wd_value
= RTC_WDS
| ((multi
& 0x1F) << 2) | (res
& 0x3);
233 rtc_write(RTC_WATCHDOG
, wd_value
);
237 #endif /* CONFIG_RTC_MK48T59 */