c8b87d76eb
Change the RTC drivers so that the rtc_(read|write)_datetime functions now deal directly with the tm struct instead of passing a string of bcd digits to/from (set|get)_time . This simplifies drivers for rtc's that do not use a bcd representation internally and cleans up some target specific code and #ifdefs in generic code. Implement simple stubs for the sim to avoid #ifdefing for that too. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22839 a1c6a512-1295-4272-9138-f99709370657
259 lines
6.5 KiB
C
259 lines
6.5 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2008 by Michael Sevakis
|
|
*
|
|
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
#include "config.h"
|
|
#include "system.h"
|
|
#include "rtc.h"
|
|
#include "mc13783.h"
|
|
|
|
/* NOTE: Defined the base to be original firmware compatible if needed -
|
|
* ie. the day and year as it would interpret a DAY register value of zero. */
|
|
|
|
/* Days passed since midnight 01 Jan, 1601 to midnight on the base date. */
|
|
#ifdef TOSHIBA_GIGABEAT_S
|
|
/* Gigabeat S seems to be 1 day behind the ususual - this will
|
|
* make the RTC match file dates created by retailos. */
|
|
#define RTC_BASE_DAY_COUNT 138425
|
|
#define RTC_BASE_MONTH 12
|
|
#define RTC_BASE_DAY 31
|
|
#define RTC_BASE_YEAR 1979
|
|
#elif 1
|
|
#define RTC_BASE_DAY_COUNT 138426
|
|
#define RTC_BASE_MONTH 1
|
|
#define RTC_BASE_DAY 1
|
|
#define RTC_BASE_YEAR 1980
|
|
#else
|
|
#define RTC_BASE_DAY_COUNT 134774
|
|
#define RTC_BASE_MONTH 1
|
|
#define RTC_BASE_DAY 1
|
|
#define RTC_BASE_YEAR 1970
|
|
#endif
|
|
|
|
enum rtc_registers_indexes
|
|
{
|
|
RTC_REG_TIME = 0,
|
|
RTC_REG_DAY,
|
|
RTC_REG_TIME2,
|
|
RTC_NUM_REGS,
|
|
};
|
|
|
|
/* was it an alarm that triggered power on ? */
|
|
static bool alarm_start = false;
|
|
|
|
static const unsigned char rtc_registers[RTC_NUM_REGS] =
|
|
{
|
|
[RTC_REG_TIME] = MC13783_RTC_TIME,
|
|
[RTC_REG_DAY] = MC13783_RTC_DAY,
|
|
[RTC_REG_TIME2] = MC13783_RTC_TIME,
|
|
};
|
|
|
|
static const unsigned char month_table[2][12] =
|
|
{
|
|
{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
|
|
{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
|
|
};
|
|
|
|
/* Get number of leaps since the reference date of 1601/01/01 */
|
|
static int get_leap_count(int d)
|
|
{
|
|
int lm = (d + 1) / 146097;
|
|
int lc = (d + 1 - lm) / 36524;
|
|
int ly = (d + 1 - lm + lc) / 1461;
|
|
return ly - lc + lm;
|
|
}
|
|
|
|
static int is_leap_year(int y)
|
|
{
|
|
return (y % 4) == 0 && ((y % 100) != 0 || (y % 400) == 0) ? 1 : 0;
|
|
}
|
|
|
|
/** Public APIs **/
|
|
void rtc_init(void)
|
|
{
|
|
/* only needs to be polled on startup */
|
|
if (mc13783_read(MC13783_INTERRUPT_STATUS1) & MC13783_TODAI)
|
|
{
|
|
alarm_start = true;
|
|
mc13783_write(MC13783_INTERRUPT_STATUS1, MC13783_TODAI);
|
|
}
|
|
}
|
|
|
|
int rtc_read_datetime(struct tm *tm)
|
|
{
|
|
uint32_t regs[RTC_NUM_REGS];
|
|
int year, leap, month, day, hour, min;
|
|
|
|
/* Read time, day, time - 2nd read of time should be the same or
|
|
* greater */
|
|
do
|
|
{
|
|
if (mc13783_read_regset(rtc_registers, regs,
|
|
RTC_NUM_REGS) < RTC_NUM_REGS)
|
|
{
|
|
/* Couldn't read registers */
|
|
return 0;
|
|
}
|
|
}
|
|
/* If TOD counter turned over - reread */
|
|
while (regs[RTC_REG_TIME2] < regs[RTC_REG_TIME]);
|
|
|
|
/* TOD: = 0 to 86399 */
|
|
hour = regs[RTC_REG_TIME] / 3600;
|
|
regs[RTC_REG_TIME] -= hour*3600;
|
|
tm->tm_hour = hour;
|
|
|
|
min = regs[RTC_REG_TIME] / 60;
|
|
regs[RTC_REG_TIME] -= min*60;
|
|
tm->tm_min = min;
|
|
|
|
tm->tm_sec = regs[RTC_REG_TIME];
|
|
|
|
/* DAY: 0 to 32767 */
|
|
day = regs[RTC_REG_DAY] + RTC_BASE_DAY_COUNT;
|
|
|
|
/* Weekday */
|
|
tm->tm_wday = (day + 1) % 7; /* 1601/01/01 = Monday */
|
|
|
|
/* Get number of leaps for today */
|
|
leap = get_leap_count(day);
|
|
year = (day - leap) / 365;
|
|
|
|
/* Get number of leaps for yesterday */
|
|
leap = get_leap_count(day - 1);
|
|
|
|
/* Get day number for year 0-364|365 */
|
|
day = day - leap - year * 365;
|
|
|
|
year += 1601;
|
|
|
|
/* Get the current month */
|
|
leap = is_leap_year(year);
|
|
|
|
for (month = 0; month < 12; month++)
|
|
{
|
|
int days = month_table[leap][month];
|
|
|
|
if (day < days)
|
|
break;
|
|
|
|
day -= days;
|
|
}
|
|
|
|
tm->tm_mday = day + 1; /* 1 to 31 */
|
|
tm->tm_mon = month; /* 0 to 11 */
|
|
tm->tm_year = year % 100 + 100;
|
|
|
|
return 7;
|
|
}
|
|
|
|
int rtc_write_datetime(const struct tm *tm)
|
|
{
|
|
uint32_t regs[2];
|
|
int year, leap, month, day, i, base_yearday;
|
|
|
|
regs[RTC_REG_TIME] = tm->tm_sec +
|
|
tm->tm_min*60 +
|
|
tm->tm_hour*3600;
|
|
|
|
year = tm->tm_year - 100;
|
|
|
|
if (year < RTC_BASE_YEAR - 1900)
|
|
year += 2000;
|
|
else
|
|
year += 1900;
|
|
|
|
/* Get number of leaps for day before base */
|
|
leap = get_leap_count(RTC_BASE_DAY_COUNT - 1);
|
|
|
|
/* Get day number for base year 0-364|365 */
|
|
base_yearday = RTC_BASE_DAY_COUNT - leap -
|
|
(RTC_BASE_YEAR - 1601) * 365;
|
|
|
|
/* Get the number of days elapsed from reference */
|
|
for (i = RTC_BASE_YEAR, day = 0; i < year; i++)
|
|
{
|
|
day += is_leap_year(i) ? 366 : 365;
|
|
}
|
|
|
|
/* Find the number of days passed this year up to the 1st of the
|
|
* month. */
|
|
leap = is_leap_year(year);
|
|
month = tm->tm_mon;
|
|
|
|
for (i = 0; i < month; i++)
|
|
{
|
|
day += month_table[leap][i];
|
|
}
|
|
|
|
regs[RTC_REG_DAY] = day + tm->tm_mday - 1 - base_yearday;
|
|
|
|
if (mc13783_write_regset(rtc_registers, regs, 2) == 2)
|
|
{
|
|
return 7;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool rtc_check_alarm_flag(void)
|
|
{
|
|
/* We don't need to do anything special if it has already fired */
|
|
return false;
|
|
}
|
|
|
|
bool rtc_enable_alarm(bool enable)
|
|
{
|
|
if (enable)
|
|
mc13783_clear(MC13783_INTERRUPT_MASK1, MC13783_TODAM);
|
|
else
|
|
mc13783_set(MC13783_INTERRUPT_MASK1, MC13783_TODAM);
|
|
|
|
return false;
|
|
}
|
|
|
|
bool rtc_check_alarm_started(bool release_alarm)
|
|
{
|
|
bool rc = alarm_start;
|
|
|
|
if (release_alarm)
|
|
alarm_start = false;
|
|
|
|
return rc;
|
|
}
|
|
|
|
void rtc_set_alarm(int h, int m)
|
|
{
|
|
int day = mc13783_read(MC13783_RTC_DAY);
|
|
int tod = mc13783_read(MC13783_RTC_TIME);
|
|
|
|
if (h*3600 + m*60 < tod)
|
|
day++;
|
|
|
|
mc13783_write(MC13783_RTC_DAY_ALARM, day);
|
|
mc13783_write(MC13783_RTC_ALARM, h*3600 + m*60);
|
|
}
|
|
|
|
void rtc_get_alarm(int *h, int *m)
|
|
{
|
|
int tod = mc13783_read(MC13783_RTC_ALARM);
|
|
*h = tod / 3600;
|
|
*m = tod % 3600 / 60;
|
|
}
|
|
|