Add a PMIC-based RTC driver for Gigabeat S.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17236 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis
parent
5f3356b942
commit
ac387d4d5c
4 changed files with 242 additions and 1 deletions
|
|
@ -149,6 +149,8 @@ drivers/rtc/rtc_as3514.c
|
|||
drivers/rtc/rtc_rx5x348ab.c
|
||||
#elif (CONFIG_RTC == RTC_MR100)
|
||||
drivers/rtc/rtc_mr100.c
|
||||
#elif (CONFIG_RTC == RTC_MC13783)
|
||||
drivers/rtc/rtc_mc13783.c
|
||||
#endif /* (CONFIG_RTC == RTC_) */
|
||||
#endif /* SIMULATOR */
|
||||
|
||||
|
|
|
|||
238
firmware/drivers/rtc/rtc_mc13783.c
Normal file
238
firmware/drivers/rtc/rtc_mc13783.c
Normal file
|
|
@ -0,0 +1,238 @@
|
|||
/***************************************************************************
|
||||
* __________ __ ___.
|
||||
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||||
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||||
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||||
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||||
* \/ \/ \/ \/ \/
|
||||
* $Id$
|
||||
*
|
||||
* Copyright (C) 2008 by Michael Sevakis
|
||||
*
|
||||
* All files in this archive are subject to the GNU General Public License.
|
||||
* See the file COPYING in the source tree root for full license agreement.
|
||||
*
|
||||
* 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_buffer_field_indexes
|
||||
{
|
||||
RTC_I_SECONDS = 0,
|
||||
RTC_I_MINUTES,
|
||||
RTC_I_HOURS,
|
||||
RTC_I_WEEKDAY,
|
||||
RTC_I_DAY,
|
||||
RTC_I_MONTH,
|
||||
RTC_I_YEAR,
|
||||
RTC_NUM_FIELDS,
|
||||
};
|
||||
|
||||
enum rtc_registers_indexes
|
||||
{
|
||||
RTC_REG_TIME = 0,
|
||||
RTC_REG_DAY,
|
||||
RTC_REG_TIME2,
|
||||
RTC_NUM_REGS,
|
||||
};
|
||||
|
||||
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 },
|
||||
};
|
||||
|
||||
static inline void to_bcd(unsigned char *bcd, const unsigned char *buf,
|
||||
int len)
|
||||
{
|
||||
while (len-- > 0)
|
||||
{
|
||||
unsigned char d = *buf++;
|
||||
*bcd++ = ((d / 10) << 4) | (d % 10);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void from_bcd(unsigned char *buf, const unsigned char *bcd,
|
||||
int len)
|
||||
{
|
||||
while (len-- > 0)
|
||||
{
|
||||
unsigned char d = *bcd++;
|
||||
*buf++ = ((d >> 4) & 0x0f) * 10 + (d & 0xf);
|
||||
}
|
||||
}
|
||||
|
||||
/* 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)
|
||||
{
|
||||
/* Nothing to do */
|
||||
}
|
||||
|
||||
int rtc_read_datetime(unsigned char* buf)
|
||||
{
|
||||
uint32_t regs[RTC_NUM_REGS];
|
||||
int year, leap, month, day;
|
||||
|
||||
/* 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 */
|
||||
buf[RTC_I_HOURS] = regs[RTC_REG_TIME] / 3600;
|
||||
regs[RTC_REG_TIME] -= buf[RTC_I_HOURS]*3600;
|
||||
|
||||
buf[RTC_I_MINUTES] = regs[RTC_REG_TIME] / 60;
|
||||
regs[RTC_REG_TIME] -= buf[RTC_I_MINUTES]*60;
|
||||
|
||||
buf[RTC_I_SECONDS] = regs[RTC_REG_TIME];
|
||||
|
||||
/* DAY: 0 to 32767 */
|
||||
day = regs[RTC_REG_DAY] + RTC_BASE_DAY_COUNT;
|
||||
|
||||
/* Weekday */
|
||||
buf[RTC_I_WEEKDAY] = (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;
|
||||
}
|
||||
|
||||
buf[RTC_I_DAY] = day + 1; /* 1 to 31 */
|
||||
buf[RTC_I_MONTH] = month + 1; /* 1 to 12 */
|
||||
buf[RTC_I_YEAR] = year % 100;
|
||||
|
||||
to_bcd(buf, buf, RTC_NUM_FIELDS);
|
||||
|
||||
return 7;
|
||||
}
|
||||
|
||||
int rtc_write_datetime(unsigned char* buf)
|
||||
{
|
||||
uint32_t regs[2];
|
||||
unsigned char fld[RTC_NUM_FIELDS];
|
||||
int year, leap, month, day, i, base_yearday;
|
||||
|
||||
from_bcd(fld, buf, RTC_NUM_FIELDS);
|
||||
|
||||
regs[RTC_REG_TIME] = fld[RTC_I_SECONDS] +
|
||||
fld[RTC_I_MINUTES]*60 +
|
||||
fld[RTC_I_HOURS]*3600;
|
||||
|
||||
year = fld[RTC_I_YEAR];
|
||||
|
||||
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 = fld[RTC_I_MONTH] - 1;
|
||||
|
||||
for (i = 0; i < month; i++)
|
||||
{
|
||||
day += month_table[leap][i];
|
||||
}
|
||||
|
||||
regs[RTC_REG_DAY] = day + fld[RTC_I_DAY] - 1 - base_yearday;
|
||||
|
||||
if (mc13783_write_regset(rtc_registers, regs, 2) == 2)
|
||||
{
|
||||
return RTC_NUM_FIELDS;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -43,7 +43,7 @@
|
|||
#define CONFIG_CODEC SWCODEC
|
||||
|
||||
/* define this if you have a real-time clock */
|
||||
//#define CONFIG_RTC RTC_IMX31L
|
||||
#define CONFIG_RTC RTC_MC13783
|
||||
|
||||
/* Define this for LCD backlight available */
|
||||
#define HAVE_BACKLIGHT
|
||||
|
|
|
|||
|
|
@ -165,6 +165,7 @@
|
|||
#define RTC_TCC77X 10
|
||||
#define RTC_TCC780X 11
|
||||
#define RTC_MR100 12
|
||||
#define RTC_MC13783 13 /* Freescale MC13783 PMIC */
|
||||
|
||||
/* USB On-the-go */
|
||||
#define USBOTG_ISP1362 1362 /* iriver H300 */
|
||||
|
|
|
|||
Loading…
Reference in a new issue