blob: 25ca1333e23166c00b122e2fb4f17c9c1fcf6e65 [file] [log] [blame]
wdenk15ef8a52003-06-18 20:22:24 +00001/*
2 * (C) Copyright 2003
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
17 * MA 02111-1307 USA
18 */
19
20/*
21 * Date & Time support for the DS12887 RTC
22 */
23
24#undef RTC_DEBUG
25
26#include <common.h>
27#include <command.h>
28#include <config.h>
29#include <rtc.h>
30
Michal Simek871c18d2008-07-14 19:45:37 +020031#if defined(CONFIG_CMD_DATE)
wdenk15ef8a52003-06-18 20:22:24 +000032
33#define RTC_SECONDS 0x00
34#define RTC_SECONDS_ALARM 0x01
35#define RTC_MINUTES 0x02
36#define RTC_MINUTES_ALARM 0x03
37#define RTC_HOURS 0x04
Wolfgang Denk53677ef2008-05-20 16:00:29 +020038#define RTC_HOURS_ALARM 0x05
39#define RTC_DAY_OF_WEEK 0x06
wdenk15ef8a52003-06-18 20:22:24 +000040#define RTC_DATE_OF_MONTH 0x07
41#define RTC_MONTH 0x08
42#define RTC_YEAR 0x09
Wolfgang Denk53677ef2008-05-20 16:00:29 +020043#define RTC_CONTROL_A 0x0A
44#define RTC_CONTROL_B 0x0B
45#define RTC_CONTROL_C 0x0C
wdenk15ef8a52003-06-18 20:22:24 +000046#define RTC_CONTROL_D 0x0D
47
wdenk993cad92003-06-26 22:04:09 +000048#define RTC_CA_UIP 0x80
wdenk15ef8a52003-06-18 20:22:24 +000049#define RTC_CB_DM 0x04
50#define RTC_CB_24_12 0x02
51#define RTC_CB_SET 0x80
52
53#if defined(CONFIG_ATC)
54
55static uchar rtc_read (uchar reg)
56{
57 uchar val;
wdenk993cad92003-06-26 22:04:09 +000058
wdenk8bde7f72003-06-27 21:31:46 +000059 *(volatile unsigned char*)(RTC_PORT_ADDR) = reg;
wdenk15ef8a52003-06-18 20:22:24 +000060 __asm__ __volatile__ ("sync");
wdenk993cad92003-06-26 22:04:09 +000061
wdenk15ef8a52003-06-18 20:22:24 +000062 val = *(volatile unsigned char*)(RTC_PORT_DATA);
63 return (val);
64}
65
66static void rtc_write (uchar reg, uchar val)
67{
wdenk8bde7f72003-06-27 21:31:46 +000068 *(volatile unsigned char*)(RTC_PORT_ADDR) = reg;
wdenk15ef8a52003-06-18 20:22:24 +000069 __asm__ __volatile__ ("sync");
70
71 *(volatile unsigned char*)(RTC_PORT_DATA) = val;
72 __asm__ __volatile__ ("sync");
73}
74
75#else
76# error Board specific rtc access functions should be supplied
77#endif
78
79static unsigned bcd2bin (uchar n)
80{
81 return ((((n >> 4) & 0x0F) * 10) + (n & 0x0F));
82}
83
84static unsigned char bin2bcd (unsigned int n)
85{
86 return (((n / 10) << 4) | (n % 10));
87}
88
89/* ------------------------------------------------------------------------- */
90
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +030091int rtc_get (struct rtc_time *tmp)
wdenk15ef8a52003-06-18 20:22:24 +000092{
93 uchar sec, min, hour, mday, wday, mon, year;
94
95 /* check if rtc is available for access */
96 while( rtc_read(RTC_CONTROL_A) & RTC_CA_UIP)
97 ;
wdenk993cad92003-06-26 22:04:09 +000098
wdenk15ef8a52003-06-18 20:22:24 +000099 sec = rtc_read(RTC_SECONDS);
100 min = rtc_read(RTC_MINUTES);
101 hour = rtc_read(RTC_HOURS);
102 mday = rtc_read(RTC_DATE_OF_MONTH);
103 wday = rtc_read(RTC_DAY_OF_WEEK);
104 mon = rtc_read(RTC_MONTH);
105 year = rtc_read(RTC_YEAR);
106
107#ifdef RTC_DEBUG
108 printf( "Get RTC year: %d; mon: %d; mday: %d; wday: %d; "
109 "hr: %d; min: %d; sec: %d\n",
110 year, mon, mday, wday, hour, min, sec );
111
112 printf ( "Alarms: hour: %02x min: %02x sec: %02x\n",
113 rtc_read (RTC_HOURS_ALARM),
114 rtc_read (RTC_MINUTES_ALARM),
115 rtc_read (RTC_SECONDS_ALARM) );
116#endif
117
118 if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM))
119 { /* Information is in BCD format */
120printf(" Get: Convert BSD to BIN\n");
121 tmp->tm_sec = bcd2bin (sec & 0x7F);
122 tmp->tm_min = bcd2bin (min & 0x7F);
123 tmp->tm_hour = bcd2bin (hour & 0x3F);
124 tmp->tm_mday = bcd2bin (mday & 0x3F);
125 tmp->tm_mon = bcd2bin (mon & 0x1F);
126 tmp->tm_year = bcd2bin (year);
127 tmp->tm_wday = bcd2bin (wday & 0x07);
128 }
129else
130 {
131 tmp->tm_sec = sec & 0x7F;
132 tmp->tm_min = min & 0x7F;
133 tmp->tm_hour = hour & 0x3F;
134 tmp->tm_mday = mday & 0x3F;
135 tmp->tm_mon = mon & 0x1F;
136 tmp->tm_year = year;
137 tmp->tm_wday = wday & 0x07;
138 }
139
140
141 if(tmp->tm_year<70)
142 tmp->tm_year+=2000;
143 else
144 tmp->tm_year+=1900;
145
146 tmp->tm_yday = 0;
147 tmp->tm_isdst= 0;
148#ifdef RTC_DEBUG
149 printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
150 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
151 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
152#endif
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +0300153
154 return 0;
wdenk15ef8a52003-06-18 20:22:24 +0000155}
156
Jean-Christophe PLAGNIOL-VILLARDd1e23192008-09-01 23:06:23 +0200157int rtc_set (struct rtc_time *tmp)
wdenk15ef8a52003-06-18 20:22:24 +0000158{
159 uchar save_ctrl_b;
160 uchar sec, min, hour, mday, wday, mon, year;
161
162#ifdef RTC_DEBUG
163 printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
164 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
165 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
166#endif
167
168 if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM))
169 { /* Information is in BCD format */
170 year = bin2bcd(tmp->tm_year % 100);
171 mon = bin2bcd(tmp->tm_mon);
172 wday = bin2bcd(tmp->tm_wday);
173 mday = bin2bcd(tmp->tm_mday);
174 hour = bin2bcd(tmp->tm_hour);
175 min = bin2bcd(tmp->tm_min);
176 sec = bin2bcd(tmp->tm_sec);
177 }
178 else
179 {
180 year = tmp->tm_year % 100;
181 mon = tmp->tm_mon;
182 wday = tmp->tm_wday;
183 mday = tmp->tm_mday;
184 hour = tmp->tm_hour;
185 min = tmp->tm_min;
186 sec = tmp->tm_sec;
187 }
wdenk993cad92003-06-26 22:04:09 +0000188
wdenk15ef8a52003-06-18 20:22:24 +0000189 /* disables the RTC to update the regs */
190 save_ctrl_b = rtc_read(RTC_CONTROL_B);
191 save_ctrl_b |= RTC_CB_SET;
wdenk993cad92003-06-26 22:04:09 +0000192 rtc_write(RTC_CONTROL_B, save_ctrl_b);
wdenk15ef8a52003-06-18 20:22:24 +0000193
194 rtc_write (RTC_YEAR, year);
195 rtc_write (RTC_MONTH, mon);
196 rtc_write (RTC_DAY_OF_WEEK, wday);
197 rtc_write (RTC_DATE_OF_MONTH, mday);
198 rtc_write (RTC_HOURS, hour);
199 rtc_write (RTC_MINUTES, min);
200 rtc_write (RTC_SECONDS, sec);
201
202 /* enables the RTC to update the regs */
203 save_ctrl_b &= ~RTC_CB_SET;
wdenk993cad92003-06-26 22:04:09 +0000204 rtc_write(RTC_CONTROL_B, save_ctrl_b);
Jean-Christophe PLAGNIOL-VILLARDd1e23192008-09-01 23:06:23 +0200205
206 return 0;
wdenk15ef8a52003-06-18 20:22:24 +0000207}
208
209void rtc_reset (void)
210{
211 struct rtc_time tmp;
212 uchar ctrl_rg;
wdenk993cad92003-06-26 22:04:09 +0000213
wdenk15ef8a52003-06-18 20:22:24 +0000214 ctrl_rg = RTC_CB_SET;
wdenk993cad92003-06-26 22:04:09 +0000215 rtc_write(RTC_CONTROL_B,ctrl_rg);
216
wdenk15ef8a52003-06-18 20:22:24 +0000217 tmp.tm_year = 1970 % 100;
218 tmp.tm_mon = 1;
219 tmp.tm_mday= 1;
220 tmp.tm_hour = 0;
221 tmp.tm_min = 0;
222 tmp.tm_sec = 0;
wdenk993cad92003-06-26 22:04:09 +0000223
wdenk15ef8a52003-06-18 20:22:24 +0000224#ifdef RTC_DEBUG
wdenk8bde7f72003-06-27 21:31:46 +0000225 printf ( "RTC: %4d-%02d-%02d %2d:%02d:%02d UTC\n",
226 tmp.tm_year, tmp.tm_mon, tmp.tm_mday,
wdenk15ef8a52003-06-18 20:22:24 +0000227 tmp.tm_hour, tmp.tm_min, tmp.tm_sec);
228#endif
229
230 ctrl_rg = RTC_CB_SET | RTC_CB_24_12 | RTC_CB_DM;
wdenk993cad92003-06-26 22:04:09 +0000231 rtc_write(RTC_CONTROL_B,ctrl_rg);
wdenk8bde7f72003-06-27 21:31:46 +0000232 rtc_set(&tmp);
wdenk15ef8a52003-06-18 20:22:24 +0000233
234 rtc_write(RTC_HOURS_ALARM, 0),
wdenk993cad92003-06-26 22:04:09 +0000235 rtc_write(RTC_MINUTES_ALARM, 0),
wdenk15ef8a52003-06-18 20:22:24 +0000236 rtc_write(RTC_SECONDS_ALARM, 0);
wdenk993cad92003-06-26 22:04:09 +0000237
wdenk15ef8a52003-06-18 20:22:24 +0000238 ctrl_rg = RTC_CB_24_12 | RTC_CB_DM;
wdenk993cad92003-06-26 22:04:09 +0000239 rtc_write(RTC_CONTROL_B,ctrl_rg);
wdenk15ef8a52003-06-18 20:22:24 +0000240}
241
Jon Loeligera5938142007-07-09 18:10:50 -0500242#endif