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30#include <common.h>
31#include <command.h>
32#include <rtc.h>
33
34#ifdef __I386__
35#include <asm/io.h>
36#define in8(p) inb(p)
37#define out8(p, v) outb(v, p)
38#endif
39
40#if defined(CONFIG_CMD_DATE)
41
42static uchar rtc_read (uchar reg);
43static void rtc_write (uchar reg, uchar val);
44
45#define RTC_PORT_MC146818 CONFIG_SYS_ISA_IO_BASE_ADDRESS + 0x70
46#define RTC_SECONDS 0x00
47#define RTC_SECONDS_ALARM 0x01
48#define RTC_MINUTES 0x02
49#define RTC_MINUTES_ALARM 0x03
50#define RTC_HOURS 0x04
51#define RTC_HOURS_ALARM 0x05
52#define RTC_DAY_OF_WEEK 0x06
53#define RTC_DATE_OF_MONTH 0x07
54#define RTC_MONTH 0x08
55#define RTC_YEAR 0x09
56#define RTC_CONFIG_A 0x0A
57#define RTC_CONFIG_B 0x0B
58#define RTC_CONFIG_C 0x0C
59#define RTC_CONFIG_D 0x0D
60
61
62
63
64int rtc_get (struct rtc_time *tmp)
65{
66 uchar sec, min, hour, mday, wday, mon, year;
67
68 while((rtc_read(RTC_CONFIG_A)&0x80)==0x80);
69 sec = rtc_read (RTC_SECONDS);
70 min = rtc_read (RTC_MINUTES);
71 hour = rtc_read (RTC_HOURS);
72 mday = rtc_read (RTC_DATE_OF_MONTH);
73 wday = rtc_read (RTC_DAY_OF_WEEK);
74 mon = rtc_read (RTC_MONTH);
75 year = rtc_read (RTC_YEAR);
76#ifdef RTC_DEBUG
77 printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
78 "hr: %02x min: %02x sec: %02x\n",
79 year, mon, mday, wday,
80 hour, min, sec );
81 printf ( "Alarms: month: %02x hour: %02x min: %02x sec: %02x\n",
82 rtc_read (RTC_CONFIG_D) & 0x3F,
83 rtc_read (RTC_HOURS_ALARM),
84 rtc_read (RTC_MINUTES_ALARM),
85 rtc_read (RTC_SECONDS_ALARM) );
86#endif
87 tmp->tm_sec = bcd2bin (sec & 0x7F);
88 tmp->tm_min = bcd2bin (min & 0x7F);
89 tmp->tm_hour = bcd2bin (hour & 0x3F);
90 tmp->tm_mday = bcd2bin (mday & 0x3F);
91 tmp->tm_mon = bcd2bin (mon & 0x1F);
92 tmp->tm_year = bcd2bin (year);
93 tmp->tm_wday = bcd2bin (wday & 0x07);
94 if(tmp->tm_year<70)
95 tmp->tm_year+=2000;
96 else
97 tmp->tm_year+=1900;
98 tmp->tm_yday = 0;
99 tmp->tm_isdst= 0;
100#ifdef RTC_DEBUG
101 printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
102 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
103 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
104#endif
105
106 return 0;
107}
108
109int rtc_set (struct rtc_time *tmp)
110{
111#ifdef RTC_DEBUG
112 printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
113 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
114 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
115#endif
116 rtc_write(RTC_CONFIG_B,0x82);
117
118 rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100));
119 rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon));
120 rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday));
121 rtc_write (RTC_DATE_OF_MONTH, bin2bcd(tmp->tm_mday));
122 rtc_write (RTC_HOURS, bin2bcd(tmp->tm_hour));
123 rtc_write (RTC_MINUTES, bin2bcd(tmp->tm_min ));
124 rtc_write (RTC_SECONDS, bin2bcd(tmp->tm_sec ));
125 rtc_write(RTC_CONFIG_B,0x02);
126
127 return 0;
128}
129
130void rtc_reset (void)
131{
132 rtc_write(RTC_CONFIG_B,0x82);
133 rtc_write(RTC_CONFIG_A,0x20);
134 rtc_write(RTC_CONFIG_B,0x00);
135 rtc_write(RTC_CONFIG_B,0x00);
136 rtc_write(RTC_CONFIG_B,0x02);
137}
138
139
140
141#ifdef CONFIG_SYS_RTC_REG_BASE_ADDR
142
143
144
145static uchar rtc_read (uchar reg)
146{
147 return(in8(CONFIG_SYS_RTC_REG_BASE_ADDR+reg));
148}
149
150static void rtc_write (uchar reg, uchar val)
151{
152 out8(CONFIG_SYS_RTC_REG_BASE_ADDR+reg, val);
153}
154#else
155static uchar rtc_read (uchar reg)
156{
157 out8(RTC_PORT_MC146818,reg);
158 return(in8(RTC_PORT_MC146818+1));
159}
160
161static void rtc_write (uchar reg, uchar val)
162{
163 out8(RTC_PORT_MC146818,reg);
164 out8(RTC_PORT_MC146818+1,val);
165}
166#endif
167
168#endif
169