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-rw-r--r--arch/mips/jmr3927/common/rtc_ds1742.c171
1 files changed, 0 insertions, 171 deletions
diff --git a/arch/mips/jmr3927/common/rtc_ds1742.c b/arch/mips/jmr3927/common/rtc_ds1742.c
deleted file mode 100644
index e6561345d12a..000000000000
--- a/arch/mips/jmr3927/common/rtc_ds1742.c
+++ /dev/null
@@ -1,171 +0,0 @@
1/*
2 * Copyright 2001 MontaVista Software Inc.
3 * Author: MontaVista Software, Inc.
4 * ahennessy@mvista.com
5 *
6 * arch/mips/jmr3927/common/rtc_ds1742.c
7 * Based on arch/mips/ddb5xxx/common/rtc_ds1386.c
8 * low-level RTC hookups for s for Dallas 1742 chip.
9 *
10 * Copyright (C) 2000-2001 Toshiba Corporation
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
20 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * You should have received a copy of the GNU General Public License along
29 * with this program; if not, write to the Free Software Foundation, Inc.,
30 * 675 Mass Ave, Cambridge, MA 02139, USA.
31 */
32
33
34/*
35 * This file exports a function, rtc_ds1386_init(), which expects an
36 * uncached base address as the argument. It will set the two function
37 * pointers expected by the MIPS generic timer code.
38 */
39
40#include <linux/bcd.h>
41#include <linux/types.h>
42#include <linux/time.h>
43#include <linux/rtc.h>
44#include <linux/ds1742rtc.h>
45
46#include <asm/time.h>
47#include <asm/addrspace.h>
48
49#include <asm/debug.h>
50
51#define EPOCH 2000
52
53static unsigned long rtc_base;
54
55static unsigned long
56rtc_ds1742_get_time(void)
57{
58 unsigned int year, month, day, hour, minute, second;
59 unsigned int century;
60 unsigned long flags;
61
62 spin_lock_irqsave(&rtc_lock, flags);
63 rtc_write(RTC_READ, RTC_CONTROL);
64 second = BCD2BIN(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK);
65 minute = BCD2BIN(rtc_read(RTC_MINUTES));
66 hour = BCD2BIN(rtc_read(RTC_HOURS));
67 day = BCD2BIN(rtc_read(RTC_DATE));
68 month = BCD2BIN(rtc_read(RTC_MONTH));
69 year = BCD2BIN(rtc_read(RTC_YEAR));
70 century = BCD2BIN(rtc_read(RTC_CENTURY) & RTC_CENTURY_MASK);
71 rtc_write(0, RTC_CONTROL);
72 spin_unlock_irqrestore(&rtc_lock, flags);
73
74 year += century * 100;
75
76 return mktime(year, month, day, hour, minute, second);
77}
78extern void to_tm(unsigned long tim, struct rtc_time * tm);
79
80static int
81rtc_ds1742_set_time(unsigned long t)
82{
83 struct rtc_time tm;
84 u8 year, month, day, hour, minute, second;
85 u8 cmos_year, cmos_month, cmos_day, cmos_hour, cmos_minute, cmos_second;
86 int cmos_century;
87 unsigned long flags;
88
89 spin_lock_irqsave(&rtc_lock, flags);
90 rtc_write(RTC_READ, RTC_CONTROL);
91 cmos_second = (u8)(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK);
92 cmos_minute = (u8)rtc_read(RTC_MINUTES);
93 cmos_hour = (u8)rtc_read(RTC_HOURS);
94 cmos_day = (u8)rtc_read(RTC_DATE);
95 cmos_month = (u8)rtc_read(RTC_MONTH);
96 cmos_year = (u8)rtc_read(RTC_YEAR);
97 cmos_century = rtc_read(RTC_CENTURY) & RTC_CENTURY_MASK;
98
99 rtc_write(RTC_WRITE, RTC_CONTROL);
100
101 /* convert */
102 to_tm(t, &tm);
103
104 /* check each field one by one */
105 year = BIN2BCD(tm.tm_year - EPOCH);
106 if (year != cmos_year) {
107 rtc_write(year,RTC_YEAR);
108 }
109
110 month = BIN2BCD(tm.tm_mon);
111 if (month != (cmos_month & 0x1f)) {
112 rtc_write((month & 0x1f) | (cmos_month & ~0x1f),RTC_MONTH);
113 }
114
115 day = BIN2BCD(tm.tm_mday);
116 if (day != cmos_day) {
117
118 rtc_write(day, RTC_DATE);
119 }
120
121 if (cmos_hour & 0x40) {
122 /* 12 hour format */
123 hour = 0x40;
124 if (tm.tm_hour > 12) {
125 hour |= 0x20 | (BIN2BCD(hour-12) & 0x1f);
126 } else {
127 hour |= BIN2BCD(tm.tm_hour);
128 }
129 } else {
130 /* 24 hour format */
131 hour = BIN2BCD(tm.tm_hour) & 0x3f;
132 }
133 if (hour != cmos_hour) rtc_write(hour, RTC_HOURS);
134
135 minute = BIN2BCD(tm.tm_min);
136 if (minute != cmos_minute) {
137 rtc_write(minute, RTC_MINUTES);
138 }
139
140 second = BIN2BCD(tm.tm_sec);
141 if (second != cmos_second) {
142 rtc_write(second & RTC_SECONDS_MASK,RTC_SECONDS);
143 }
144
145 /* RTC_CENTURY and RTC_CONTROL share same address... */
146 rtc_write(cmos_century, RTC_CONTROL);
147 spin_unlock_irqrestore(&rtc_lock, flags);
148
149 return 0;
150}
151
152void
153rtc_ds1742_init(unsigned long base)
154{
155 u8 cmos_second;
156
157 /* remember the base */
158 rtc_base = base;
159 db_assert((rtc_base & 0xe0000000) == KSEG1);
160
161 /* set the function pointers */
162 rtc_mips_get_time = rtc_ds1742_get_time;
163 rtc_mips_set_time = rtc_ds1742_set_time;
164
165 /* clear oscillator stop bit */
166 rtc_write(RTC_READ, RTC_CONTROL);
167 cmos_second = (u8)(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK);
168 rtc_write(RTC_WRITE, RTC_CONTROL);
169 rtc_write(cmos_second, RTC_SECONDS); /* clear msb */
170 rtc_write(0, RTC_CONTROL);
171}
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