]>
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 * SPDX-License-Identifier: GPL-2.0+
9 * Date & Time support for the MK48T59 RTC
20 #if defined(CONFIG_BAB7xx)
22 static uchar
rtc_read (short reg
)
24 out8(RTC_PORT_ADDR0
, reg
& 0xFF);
25 out8(RTC_PORT_ADDR1
, (reg
>>8) & 0xFF);
26 return in8(RTC_PORT_DATA
);
29 static void rtc_write (short reg
, uchar val
)
31 out8(RTC_PORT_ADDR0
, reg
& 0xFF);
32 out8(RTC_PORT_ADDR1
, (reg
>>8) & 0xFF);
33 out8(RTC_PORT_DATA
, val
);
36 #elif defined(CONFIG_EVAL5200)
38 static uchar
rtc_read (short reg
)
43 static void rtc_write (short reg
, uchar val
)
49 # error Board specific rtc access functions should be supplied
52 /* ------------------------------------------------------------------------- */
54 void *nvram_read(void *dest
, const short src
, size_t count
)
56 uchar
*d
= (uchar
*) dest
;
65 void nvram_write(short dest
, const void *src
, size_t count
)
68 uchar
*s
= (uchar
*) src
;
74 #if defined(CONFIG_CMD_DATE)
76 /* ------------------------------------------------------------------------- */
78 int rtc_get (struct rtc_time
*tmp
)
81 uchar sec
, min
, hour
, mday
, wday
, mon
, year
;
83 /* Simple: freeze the clock, read it and allow updates again */
84 save_ctrl_a
= rtc_read(RTC_CONTROLA
);
86 /* Set the register to read the value. */
87 save_ctrl_a
|= RTC_CA_READ
;
88 rtc_write(RTC_CONTROLA
, save_ctrl_a
);
90 sec
= rtc_read (RTC_SECONDS
);
91 min
= rtc_read (RTC_MINUTES
);
92 hour
= rtc_read (RTC_HOURS
);
93 mday
= rtc_read (RTC_DAY_OF_MONTH
);
94 wday
= rtc_read (RTC_DAY_OF_WEEK
);
95 mon
= rtc_read (RTC_MONTH
);
96 year
= rtc_read (RTC_YEAR
);
98 /* re-enable update */
99 save_ctrl_a
&= ~RTC_CA_READ
;
100 rtc_write(RTC_CONTROLA
, save_ctrl_a
);
103 printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
104 "hr: %02x min: %02x sec: %02x\n",
105 year
, mon
, mday
, wday
,
108 tmp
->tm_sec
= bcd2bin (sec
& 0x7F);
109 tmp
->tm_min
= bcd2bin (min
& 0x7F);
110 tmp
->tm_hour
= bcd2bin (hour
& 0x3F);
111 tmp
->tm_mday
= bcd2bin (mday
& 0x3F);
112 tmp
->tm_mon
= bcd2bin (mon
& 0x1F);
113 tmp
->tm_year
= bcd2bin (year
);
114 tmp
->tm_wday
= bcd2bin (wday
& 0x07);
122 printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
123 tmp
->tm_year
, tmp
->tm_mon
, tmp
->tm_mday
, tmp
->tm_wday
,
124 tmp
->tm_hour
, tmp
->tm_min
, tmp
->tm_sec
);
130 int rtc_set (struct rtc_time
*tmp
)
135 printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
136 tmp
->tm_year
, tmp
->tm_mon
, tmp
->tm_mday
, tmp
->tm_wday
,
137 tmp
->tm_hour
, tmp
->tm_min
, tmp
->tm_sec
);
139 save_ctrl_a
= rtc_read(RTC_CONTROLA
);
141 save_ctrl_a
|= RTC_CA_WRITE
;
142 rtc_write(RTC_CONTROLA
, save_ctrl_a
); /* disables the RTC to update the regs */
144 rtc_write (RTC_YEAR
, bin2bcd(tmp
->tm_year
% 100));
145 rtc_write (RTC_MONTH
, bin2bcd(tmp
->tm_mon
));
147 rtc_write (RTC_DAY_OF_WEEK
, bin2bcd(tmp
->tm_wday
));
148 rtc_write (RTC_DAY_OF_MONTH
, bin2bcd(tmp
->tm_mday
));
149 rtc_write (RTC_HOURS
, bin2bcd(tmp
->tm_hour
));
150 rtc_write (RTC_MINUTES
, bin2bcd(tmp
->tm_min
));
151 rtc_write (RTC_SECONDS
, bin2bcd(tmp
->tm_sec
));
153 save_ctrl_a
&= ~RTC_CA_WRITE
;
154 rtc_write(RTC_CONTROLA
, save_ctrl_a
); /* enables the RTC to update the regs */
159 void rtc_reset (void)
164 * Start oscillator here.
166 control_b
= rtc_read(RTC_CONTROLB
);
168 control_b
&= ~RTC_CB_STOP
;
169 rtc_write(RTC_CONTROLB
, control_b
);
172 void rtc_set_watchdog(short multi
, short res
)
176 wd_value
= RTC_WDS
| ((multi
& 0x1F) << 2) | (res
& 0x3);
177 rtc_write(RTC_WATCHDOG
, wd_value
);