u-boot/drivers/rtc/mc146818.c
Rob Herring 7682a99826 remove unnecessary version.h includes
Various files are needlessly rebuilt every time due to the version and
build time changing. As version.h is not actually needed, remove the
include.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Tom Warren <twarren@nvidia.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Macpaul Lin <macpaul@andestech.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: York Sun <yorksun@freescale.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Philippe Reynes <tremyfr@yahoo.fr>
Cc: Eric Jarrige <eric.jarrige@armadeus.org>
Cc: "David Müller" <d.mueller@elsoft.ch>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Robert Baldyga <r.baldyga@samsung.com>
Cc: Torsten Koschorrek <koschorrek@synertronixx.de>
Cc: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Łukasz Majewski <l.majewski@samsung.com>
2015-03-24 10:50:50 -04:00

211 lines
5.1 KiB
C

/*
* (C) Copyright 2001
* Denis Peter MPL AG Switzerland. d.peter@mpl.ch
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Date & Time support for the MC146818 (PIXX4) RTC
*/
/*#define DEBUG*/
#include <common.h>
#include <command.h>
#include <rtc.h>
#if defined(__I386__) || defined(CONFIG_MALTA)
#include <asm/io.h>
#define in8(p) inb(p)
#define out8(p, v) outb(v, p)
#endif
#if defined(CONFIG_CMD_DATE)
/* Set this to 1 to clear the CMOS RAM */
#define CLEAR_CMOS 0
#define RTC_PORT_MC146818 CONFIG_SYS_ISA_IO_BASE_ADDRESS + 0x70
#define RTC_SECONDS 0x00
#define RTC_SECONDS_ALARM 0x01
#define RTC_MINUTES 0x02
#define RTC_MINUTES_ALARM 0x03
#define RTC_HOURS 0x04
#define RTC_HOURS_ALARM 0x05
#define RTC_DAY_OF_WEEK 0x06
#define RTC_DATE_OF_MONTH 0x07
#define RTC_MONTH 0x08
#define RTC_YEAR 0x09
#define RTC_CONFIG_A 0x0A
#define RTC_CONFIG_B 0x0B
#define RTC_CONFIG_C 0x0C
#define RTC_CONFIG_D 0x0D
#define RTC_REG_SIZE 0x80
#define RTC_CONFIG_A_REF_CLCK_32KHZ (1 << 5)
#define RTC_CONFIG_A_RATE_1024HZ 6
#define RTC_CONFIG_B_24H (1 << 1)
#define RTC_CONFIG_D_VALID_RAM_AND_TIME 0x80
/* ------------------------------------------------------------------------- */
int rtc_get (struct rtc_time *tmp)
{
uchar sec, min, hour, mday, wday, mon, year;
/* here check if rtc can be accessed */
while ((rtc_read8(RTC_CONFIG_A) & 0x80) == 0x80);
sec = rtc_read8(RTC_SECONDS);
min = rtc_read8(RTC_MINUTES);
hour = rtc_read8(RTC_HOURS);
mday = rtc_read8(RTC_DATE_OF_MONTH);
wday = rtc_read8(RTC_DAY_OF_WEEK);
mon = rtc_read8(RTC_MONTH);
year = rtc_read8(RTC_YEAR);
#ifdef RTC_DEBUG
printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
"hr: %02x min: %02x sec: %02x\n",
year, mon, mday, wday,
hour, min, sec );
printf ( "Alarms: month: %02x hour: %02x min: %02x sec: %02x\n",
rtc_read8(RTC_CONFIG_D) & 0x3F,
rtc_read8(RTC_HOURS_ALARM),
rtc_read8(RTC_MINUTES_ALARM),
rtc_read8(RTC_SECONDS_ALARM));
#endif
tmp->tm_sec = bcd2bin (sec & 0x7F);
tmp->tm_min = bcd2bin (min & 0x7F);
tmp->tm_hour = bcd2bin (hour & 0x3F);
tmp->tm_mday = bcd2bin (mday & 0x3F);
tmp->tm_mon = bcd2bin (mon & 0x1F);
tmp->tm_year = bcd2bin (year);
tmp->tm_wday = bcd2bin (wday & 0x07);
if(tmp->tm_year<70)
tmp->tm_year+=2000;
else
tmp->tm_year+=1900;
tmp->tm_yday = 0;
tmp->tm_isdst= 0;
#ifdef RTC_DEBUG
printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
#endif
return 0;
}
int rtc_set (struct rtc_time *tmp)
{
#ifdef RTC_DEBUG
printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
#endif
rtc_write8(RTC_CONFIG_B, 0x82); /* disable the RTC to update the regs */
rtc_write8(RTC_YEAR, bin2bcd(tmp->tm_year % 100));
rtc_write8(RTC_MONTH, bin2bcd(tmp->tm_mon));
rtc_write8(RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday));
rtc_write8(RTC_DATE_OF_MONTH, bin2bcd(tmp->tm_mday));
rtc_write8(RTC_HOURS, bin2bcd(tmp->tm_hour));
rtc_write8(RTC_MINUTES, bin2bcd(tmp->tm_min));
rtc_write8(RTC_SECONDS, bin2bcd(tmp->tm_sec));
rtc_write8(RTC_CONFIG_B, 0x02); /* enable the RTC to update the regs */
return 0;
}
void rtc_reset (void)
{
rtc_write8(RTC_CONFIG_B, 0x82); /* disable the RTC to update the regs */
rtc_write8(RTC_CONFIG_A, 0x20); /* Normal OP */
rtc_write8(RTC_CONFIG_B, 0x00);
rtc_write8(RTC_CONFIG_B, 0x00);
rtc_write8(RTC_CONFIG_B, 0x02); /* enable the RTC to update the regs */
}
/* ------------------------------------------------------------------------- */
/*
* use direct memory access
*/
int rtc_read8(int reg)
{
#ifdef CONFIG_SYS_RTC_REG_BASE_ADDR
return in8(CONFIG_SYS_RTC_REG_BASE_ADDR + reg);
#else
int ofs = 0;
if (reg >= 128) {
ofs = 2;
reg -= 128;
}
out8(RTC_PORT_MC146818 + ofs, reg);
return in8(RTC_PORT_MC146818 + ofs + 1);
#endif
}
void rtc_write8(int reg, uchar val)
{
#ifdef CONFIG_SYS_RTC_REG_BASE_ADDR
out8(CONFIG_SYS_RTC_REG_BASE_ADDR + reg, val);
#else
int ofs = 0;
if (reg >= 128) {
ofs = 2;
reg -= 128;
}
out8(RTC_PORT_MC146818 + ofs, reg);
out8(RTC_PORT_MC146818 + ofs + 1, val);
#endif
}
u32 rtc_read32(int reg)
{
u32 value = 0;
int i;
for (i = 0; i < sizeof(value); i++)
value |= rtc_read8(reg + i) << (i << 3);
return value;
}
void rtc_write32(int reg, u32 value)
{
int i;
for (i = 0; i < sizeof(value); i++)
rtc_write8(reg + i, (value >> (i << 3)) & 0xff);
}
void rtc_init(void)
{
#if CLEAR_CMOS
int i;
rtc_write8(RTC_SECONDS_ALARM, 0);
rtc_write8(RTC_MINUTES_ALARM, 0);
rtc_write8(RTC_HOURS_ALARM, 0);
for (i = RTC_CONFIG_A; i < RTC_REG_SIZE; i++)
rtc_write8(i, 0);
printf("RTC: zeroing CMOS RAM\n");
#endif
/* Setup the real time clock */
rtc_write8(RTC_CONFIG_B, RTC_CONFIG_B_24H);
/* Setup the frequency it operates at */
rtc_write8(RTC_CONFIG_A, RTC_CONFIG_A_REF_CLCK_32KHZ |
RTC_CONFIG_A_RATE_1024HZ);
/* Ensure all reserved bits are 0 in register D */
rtc_write8(RTC_CONFIG_D, RTC_CONFIG_D_VALID_RAM_AND_TIME);
/* Clear any pending interrupts */
rtc_read8(RTC_CONFIG_C);
}
#endif