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Diffstat (limited to 'arch/mips/ddb5xxx/common/rtc_ds1386.c')
-rw-r--r--arch/mips/ddb5xxx/common/rtc_ds1386.c170
1 files changed, 0 insertions, 170 deletions
diff --git a/arch/mips/ddb5xxx/common/rtc_ds1386.c b/arch/mips/ddb5xxx/common/rtc_ds1386.c
deleted file mode 100644
index 5dc34daa715..00000000000
--- a/arch/mips/ddb5xxx/common/rtc_ds1386.c
+++ /dev/null
@@ -1,170 +0,0 @@
-/*
- * Copyright 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * arch/mips/ddb5xxx/common/rtc_ds1386.c
- * low-level RTC hookups for s for Dallas 1396 chip.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-
-/*
- * This file exports a function, rtc_ds1386_init(), which expects an
- * uncached base address as the argument. It will set the two function
- * pointers expected by the MIPS generic timer code.
- */
-
-#include <linux/types.h>
-#include <linux/time.h>
-#include <linux/bcd.h>
-
-#include <asm/time.h>
-#include <asm/addrspace.h>
-
-#include <asm/mc146818rtc.h>
-#include <asm/debug.h>
-
-#define EPOCH 2000
-
-#define READ_RTC(x) *(volatile unsigned char*)(rtc_base+x)
-#define WRITE_RTC(x, y) *(volatile unsigned char*)(rtc_base+x) = y
-
-static unsigned long rtc_base;
-
-static unsigned long
-rtc_ds1386_get_time(void)
-{
- u8 byte;
- u8 temp;
- unsigned int year, month, day, hour, minute, second;
- unsigned long flags;
-
- spin_lock_irqsave(&rtc_lock, flags);
- /* let us freeze external registers */
- byte = READ_RTC(0xB);
- byte &= 0x3f;
- WRITE_RTC(0xB, byte);
-
- /* read time data */
- year = BCD2BIN(READ_RTC(0xA)) + EPOCH;
- month = BCD2BIN(READ_RTC(0x9) & 0x1f);
- day = BCD2BIN(READ_RTC(0x8));
- minute = BCD2BIN(READ_RTC(0x2));
- second = BCD2BIN(READ_RTC(0x1));
-
- /* hour is special - deal with it later */
- temp = READ_RTC(0x4);
-
- /* enable time transfer */
- byte |= 0x80;
- WRITE_RTC(0xB, byte);
- spin_unlock_irqrestore(&rtc_lock, flags);
-
- /* calc hour */
- if (temp & 0x40) {
- /* 12 hour format */
- hour = BCD2BIN(temp & 0x1f);
- if (temp & 0x20) hour += 12; /* PM */
- } else {
- /* 24 hour format */
- hour = BCD2BIN(temp & 0x3f);
- }
-
- return mktime(year, month, day, hour, minute, second);
-}
-
-static int
-rtc_ds1386_set_time(unsigned long t)
-{
- struct rtc_time tm;
- u8 byte;
- u8 temp;
- u8 year, month, day, hour, minute, second;
- unsigned long flags;
-
- spin_lock_irqsave(&rtc_lock, flags);
- /* let us freeze external registers */
- byte = READ_RTC(0xB);
- byte &= 0x3f;
- WRITE_RTC(0xB, byte);
-
- /* convert */
- to_tm(t, &tm);
-
-
- /* check each field one by one */
- year = BIN2BCD(tm.tm_year - EPOCH);
- if (year != READ_RTC(0xA)) {
- WRITE_RTC(0xA, year);
- }
-
- temp = READ_RTC(0x9);
- month = BIN2BCD(tm.tm_mon+1); /* tm_mon starts from 0 to 11 */
- if (month != (temp & 0x1f)) {
- WRITE_RTC( 0x9,
- (month & 0x1f) | (temp & ~0x1f) );
- }
-
- day = BIN2BCD(tm.tm_mday);
- if (day != READ_RTC(0x8)) {
- WRITE_RTC(0x8, day);
- }
-
- temp = READ_RTC(0x4);
- if (temp & 0x40) {
- /* 12 hour format */
- hour = 0x40;
- if (tm.tm_hour > 12) {
- hour |= 0x20 | (BIN2BCD(hour-12) & 0x1f);
- } else {
- hour |= BIN2BCD(tm.tm_hour);
- }
- } else {
- /* 24 hour format */
- hour = BIN2BCD(tm.tm_hour) & 0x3f;
- }
- if (hour != temp) WRITE_RTC(0x4, hour);
-
- minute = BIN2BCD(tm.tm_min);
- if (minute != READ_RTC(0x2)) {
- WRITE_RTC(0x2, minute);
- }
-
- second = BIN2BCD(tm.tm_sec);
- if (second != READ_RTC(0x1)) {
- WRITE_RTC(0x1, second);
- }
- spin_unlock_irqrestore(&rtc_lock, flags);
-
- return 0;
-}
-
-void
-rtc_ds1386_init(unsigned long base)
-{
- unsigned char byte;
-
- /* remember the base */
- rtc_base = base;
- db_assert((rtc_base & 0xe0000000) == KSEG1);
-
- /* turn on RTC if it is not on */
- byte = READ_RTC(0x9);
- if (byte & 0x80) {
- byte &= 0x7f;
- WRITE_RTC(0x9, byte);
- }
-
- /* enable time transfer */
- byte = READ_RTC(0xB);
- byte |= 0x80;
- WRITE_RTC(0xB, byte);
-
- /* set the function pointers */
- rtc_mips_get_time = rtc_ds1386_get_time;
- rtc_mips_set_time = rtc_ds1386_set_time;
-}