9431ea8c65
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21679 a1c6a512-1295-4272-9138-f99709370657
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2009 by Bertrik Sikken
|
|
* Copyright (C) 2008 by Robert Kukla
|
|
*
|
|
* 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 "rtc.h"
|
|
#include "i2c-s5l8700.h"
|
|
|
|
/* Driver for the Seiko S35390A real-time clock chip with i2c interface
|
|
|
|
This driver was derived from rtc_mr100.c and adapted for the S35390A
|
|
used in the Meizu M3 (and possibly others).
|
|
*/
|
|
|
|
#define RTC_ADDR 0x60
|
|
|
|
#define STATUS_REG1 0
|
|
#define STATUS_REG2 1
|
|
#define REALTIME_DATA1 2
|
|
#define REALTIME_DATA2 3
|
|
#define INT1_REG 4
|
|
#define INT2_REG 5
|
|
#define CLOCK_CORR_REG 6
|
|
#define FREE_REG 7
|
|
|
|
|
|
static void reverse_bits(unsigned char* v, int size)
|
|
{
|
|
static const unsigned char flipnibble[] =
|
|
{0x00, 0x08, 0x04, 0x0C, 0x02, 0x0A, 0x06, 0x0E,
|
|
0x01, 0x09, 0x05, 0x0D, 0x03, 0x0B, 0x07, 0x0F};
|
|
int i;
|
|
|
|
for (i = 0; i < size; i++) {
|
|
v[i] = (flipnibble[v[i] & 0x0F] << 4) |
|
|
flipnibble[(v[i] >> 4) & 0x0F];
|
|
}
|
|
}
|
|
|
|
void rtc_init(void)
|
|
{
|
|
}
|
|
|
|
int rtc_read_datetime(unsigned char* buf)
|
|
{
|
|
unsigned char data[7];
|
|
int i, ret;
|
|
|
|
ret = i2c_read(RTC_ADDR | (REALTIME_DATA1 << 1), -1, sizeof(data), data);
|
|
reverse_bits(data, sizeof(data));
|
|
|
|
buf[4] &= 0x3f; /* mask out p.m. flag */
|
|
|
|
for (i = 0; i < 7; i++) {
|
|
buf[i] = data[6 - i];
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int rtc_write_datetime(unsigned char* buf)
|
|
{
|
|
unsigned char data[7];
|
|
int i, ret;
|
|
|
|
for (i = 0; i < 7; i++) {
|
|
data[i] = buf[6 - i];
|
|
}
|
|
|
|
reverse_bits(data, sizeof(data));
|
|
ret = i2c_write(RTC_ADDR | (REALTIME_DATA1 << 1), -1, sizeof(data), data);
|
|
|
|
return ret;
|
|
}
|
|
|