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wdenk1df49e22002-09-17 21:37:55 +00001/*
2 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
3 * Andreas Heppel <aheppel@sysgo.de>
4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
wdenk1df49e22002-09-17 21:37:55 +00006 */
7
8/*
9 * Date & Time support for the MK48T59 RTC
10 */
11
12#undef RTC_DEBUG
13
14#include <common.h>
15#include <command.h>
16#include <config.h>
17#include <rtc.h>
18#include <mk48t59.h>
19
wdenk1df49e22002-09-17 21:37:55 +000020#if defined(CONFIG_BAB7xx)
21
22static uchar rtc_read (short reg)
23{
24 out8(RTC_PORT_ADDR0, reg & 0xFF);
25 out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
26 return in8(RTC_PORT_DATA);
27}
28
29static void rtc_write (short reg, uchar val)
30{
31 out8(RTC_PORT_ADDR0, reg & 0xFF);
32 out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
33 out8(RTC_PORT_DATA, val);
34}
35
wdenk63e73c92004-02-23 22:22:28 +000036#elif defined(CONFIG_EVAL5200)
37
38static uchar rtc_read (short reg)
39{
40 return in8(RTC(reg));
41}
42
43static void rtc_write (short reg, uchar val)
44{
45 out8(RTC(reg),val);
46}
47
wdenk1df49e22002-09-17 21:37:55 +000048#else
49# error Board specific rtc access functions should be supplied
50#endif
51
wdenk1df49e22002-09-17 21:37:55 +000052/* ------------------------------------------------------------------------- */
53
54void *nvram_read(void *dest, const short src, size_t count)
55{
56 uchar *d = (uchar *) dest;
57 short s = src;
58
59 while (count--)
60 *d++ = rtc_read(s++);
61
62 return dest;
63}
64
65void nvram_write(short dest, const void *src, size_t count)
66{
67 short d = dest;
68 uchar *s = (uchar *) src;
69
70 while (count--)
71 rtc_write(d++, *s++);
72}
73
Jon Loeligera5938142007-07-09 18:10:50 -050074#if defined(CONFIG_CMD_DATE)
wdenk1df49e22002-09-17 21:37:55 +000075
76/* ------------------------------------------------------------------------- */
77
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +030078int rtc_get (struct rtc_time *tmp)
wdenk1df49e22002-09-17 21:37:55 +000079{
80 uchar save_ctrl_a;
81 uchar sec, min, hour, mday, wday, mon, year;
82
83 /* Simple: freeze the clock, read it and allow updates again */
84 save_ctrl_a = rtc_read(RTC_CONTROLA);
85
86 /* Set the register to read the value. */
87 save_ctrl_a |= RTC_CA_READ;
88 rtc_write(RTC_CONTROLA, save_ctrl_a);
89
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);
97
98 /* re-enable update */
99 save_ctrl_a &= ~RTC_CA_READ;
100 rtc_write(RTC_CONTROLA, save_ctrl_a);
101
102#ifdef RTC_DEBUG
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,
106 hour, min, sec );
107#endif
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);
115 if(tmp->tm_year<70)
116 tmp->tm_year+=2000;
117 else
118 tmp->tm_year+=1900;
119 tmp->tm_yday = 0;
120 tmp->tm_isdst= 0;
121#ifdef RTC_DEBUG
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);
125#endif
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +0300126
127 return 0;
wdenk1df49e22002-09-17 21:37:55 +0000128}
129
Jean-Christophe PLAGNIOL-VILLARDd1e23192008-09-01 23:06:23 +0200130int rtc_set (struct rtc_time *tmp)
wdenk1df49e22002-09-17 21:37:55 +0000131{
132 uchar save_ctrl_a;
133
134#ifdef RTC_DEBUG
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);
138#endif
139 save_ctrl_a = rtc_read(RTC_CONTROLA);
140
141 save_ctrl_a |= RTC_CA_WRITE;
142 rtc_write(RTC_CONTROLA, save_ctrl_a); /* disables the RTC to update the regs */
143
144 rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100));
145 rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon));
146
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 ));
152
153 save_ctrl_a &= ~RTC_CA_WRITE;
154 rtc_write(RTC_CONTROLA, save_ctrl_a); /* enables the RTC to update the regs */
Jean-Christophe PLAGNIOL-VILLARDd1e23192008-09-01 23:06:23 +0200155
156 return 0;
wdenk1df49e22002-09-17 21:37:55 +0000157}
158
159void rtc_reset (void)
160{
161 uchar control_b;
162
163 /*
164 * Start oscillator here.
165 */
166 control_b = rtc_read(RTC_CONTROLB);
167
168 control_b &= ~RTC_CB_STOP;
169 rtc_write(RTC_CONTROLB, control_b);
170}
171
Wolfgang Denk2c5e3cc2008-09-08 21:28:14 +0200172void rtc_set_watchdog(short multi, short res)
wdenk1df49e22002-09-17 21:37:55 +0000173{
174 uchar wd_value;
175
176 wd_value = RTC_WDS | ((multi & 0x1F) << 2) | (res & 0x3);
177 rtc_write(RTC_WATCHDOG, wd_value);
178}
179
Jon Loeligera5938142007-07-09 18:10:50 -0500180#endif