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@@ -1,164 +0,0 @@
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-/*
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- * arch/arm/mach-footbridge/include/mach/time.h
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- *
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- * Copyright (C) 1998 Russell King.
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- * Copyright (C) 1998 Phil Blundell
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- *
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- * CATS has a real-time clock, though the evaluation board doesn't.
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- *
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- * Changelog:
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- * 21-Mar-1998 RMK Created
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- * 27-Aug-1998 PJB CATS support
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- * 28-Dec-1998 APH Made leds optional
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- * 20-Jan-1999 RMK Started merge of EBSA285, CATS and NetWinder
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- * 16-Mar-1999 RMK More support for EBSA285-like machines with RTCs in
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- */
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-
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-#define RTC_PORT(x) (rtc_base+(x))
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-#define RTC_ALWAYS_BCD 0
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-
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-#include <linux/timex.h>
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-#include <linux/init.h>
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-#include <linux/sched.h>
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-#include <linux/mc146818rtc.h>
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-#include <linux/bcd.h>
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-#include <linux/io.h>
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-
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-#include <mach/hardware.h>
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-
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-#include <asm/mach/time.h>
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-#include "common.h"
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-
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-static int rtc_base;
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-
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-static unsigned long __init get_isa_cmos_time(void)
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-{
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- unsigned int year, mon, day, hour, min, sec;
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-
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- // check to see if the RTC makes sense.....
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- if ((CMOS_READ(RTC_VALID) & RTC_VRT) == 0)
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- return mktime(1970, 1, 1, 0, 0, 0);
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-
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- do {
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- sec = CMOS_READ(RTC_SECONDS);
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- min = CMOS_READ(RTC_MINUTES);
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- hour = CMOS_READ(RTC_HOURS);
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- day = CMOS_READ(RTC_DAY_OF_MONTH);
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- mon = CMOS_READ(RTC_MONTH);
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- year = CMOS_READ(RTC_YEAR);
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- } while (sec != CMOS_READ(RTC_SECONDS));
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-
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- if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
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- sec = bcd2bin(sec);
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- min = bcd2bin(min);
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- hour = bcd2bin(hour);
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- day = bcd2bin(day);
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- mon = bcd2bin(mon);
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- year = bcd2bin(year);
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- }
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- if ((year += 1900) < 1970)
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- year += 100;
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- return mktime(year, mon, day, hour, min, sec);
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-}
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-
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-static int set_isa_cmos_time(void)
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-{
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- int retval = 0;
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- int real_seconds, real_minutes, cmos_minutes;
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- unsigned char save_control, save_freq_select;
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- unsigned long nowtime = xtime.tv_sec;
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-
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- save_control = CMOS_READ(RTC_CONTROL); /* tell the clock it's being set */
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- CMOS_WRITE((save_control|RTC_SET), RTC_CONTROL);
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-
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- save_freq_select = CMOS_READ(RTC_FREQ_SELECT); /* stop and reset prescaler */
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- CMOS_WRITE((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
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-
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- cmos_minutes = CMOS_READ(RTC_MINUTES);
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- if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
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- cmos_minutes = bcd2bin(cmos_minutes);
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-
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- /*
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- * since we're only adjusting minutes and seconds,
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- * don't interfere with hour overflow. This avoids
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- * messing with unknown time zones but requires your
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- * RTC not to be off by more than 15 minutes
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- */
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- real_seconds = nowtime % 60;
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- real_minutes = nowtime / 60;
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- if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
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- real_minutes += 30; /* correct for half hour time zone */
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- real_minutes %= 60;
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-
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- if (abs(real_minutes - cmos_minutes) < 30) {
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- if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
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- real_seconds = bin2bcd(real_seconds);
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- real_minutes = bin2bcd(real_minutes);
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- }
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- CMOS_WRITE(real_seconds,RTC_SECONDS);
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- CMOS_WRITE(real_minutes,RTC_MINUTES);
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- } else
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- retval = -1;
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-
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- /* The following flags have to be released exactly in this order,
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- * otherwise the DS12887 (popular MC146818A clone with integrated
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- * battery and quartz) will not reset the oscillator and will not
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- * update precisely 500 ms later. You won't find this mentioned in
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- * the Dallas Semiconductor data sheets, but who believes data
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- * sheets anyway ... -- Markus Kuhn
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- */
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- CMOS_WRITE(save_control, RTC_CONTROL);
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- CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
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-
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- return retval;
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-}
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-
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-void __init isa_rtc_init(void)
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-{
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- if (machine_is_personal_server())
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- /*
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- * Add-in 21285s shouldn't access the RTC
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- */
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- rtc_base = 0;
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- else
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- rtc_base = 0x70;
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-
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- if (rtc_base) {
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- int reg_d, reg_b;
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-
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- /*
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- * Probe for the RTC.
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- */
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- reg_d = CMOS_READ(RTC_REG_D);
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-
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- /*
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- * make sure the divider is set
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- */
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- CMOS_WRITE(RTC_REF_CLCK_32KHZ, RTC_REG_A);
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-
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- /*
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- * Set control reg B
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- * (24 hour mode, update enabled)
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- */
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- reg_b = CMOS_READ(RTC_REG_B) & 0x7f;
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- reg_b |= 2;
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- CMOS_WRITE(reg_b, RTC_REG_B);
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-
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- if ((CMOS_READ(RTC_REG_A) & 0x7f) == RTC_REF_CLCK_32KHZ &&
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- CMOS_READ(RTC_REG_B) == reg_b) {
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- struct timespec tv;
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-
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- /*
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- * We have a RTC. Check the battery
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- */
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- if ((reg_d & 0x80) == 0)
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- printk(KERN_WARNING "RTC: *** warning: CMOS battery bad\n");
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-
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- tv.tv_nsec = 0;
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- tv.tv_sec = get_isa_cmos_time();
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- do_settimeofday(&tv);
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- set_rtc = set_isa_cmos_time;
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- } else
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- rtc_base = 0;
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- }
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-}
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Russell King