CRIS: Remove legacy RTC drivers
These old drivers are not used anymore, we use the ones in drivers/rtc. This allows us to remove some cruft in the CRIS timekeeping code. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
This commit is contained in:
Jesper Nilsson
parent
4d5914d628
commit
9c75fc8c5c
|
|
@ -1,515 +0,0 @@
|
|||
/*!***************************************************************************
|
||||
*!
|
||||
*! FILE NAME : ds1302.c
|
||||
*!
|
||||
*! DESCRIPTION: Implements an interface for the DS1302 RTC through Etrax I/O
|
||||
*!
|
||||
*! Functions exported: ds1302_readreg, ds1302_writereg, ds1302_init
|
||||
*!
|
||||
*! ---------------------------------------------------------------------------
|
||||
*!
|
||||
*! (C) Copyright 1999-2007 Axis Communications AB, LUND, SWEDEN
|
||||
*!
|
||||
*!***************************************************************************/
|
||||
|
||||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/bcd.h>
|
||||
#include <linux/capability.h>
|
||||
|
||||
#include <asm/uaccess.h>
|
||||
#include <arch/svinto.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/rtc.h>
|
||||
#include <arch/io_interface_mux.h>
|
||||
|
||||
#include "i2c.h"
|
||||
|
||||
#define RTC_MAJOR_NR 121 /* local major, change later */
|
||||
|
||||
static DEFINE_MUTEX(ds1302_mutex);
|
||||
static const char ds1302_name[] = "ds1302";
|
||||
|
||||
/* The DS1302 might be connected to different bits on different products.
|
||||
* It has three signals - SDA, SCL and RST. RST and SCL are always outputs,
|
||||
* but SDA can have a selected direction.
|
||||
* For now, only PORT_PB is hardcoded.
|
||||
*/
|
||||
|
||||
/* The RST bit may be on either the Generic Port or Port PB. */
|
||||
#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT
|
||||
#define TK_RST_OUT(x) REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow, CONFIG_ETRAX_DS1302_RSTBIT, x)
|
||||
#define TK_RST_DIR(x)
|
||||
#else
|
||||
#define TK_RST_OUT(x) REG_SHADOW_SET(R_PORT_PB_DATA, port_pb_data_shadow, CONFIG_ETRAX_DS1302_RSTBIT, x)
|
||||
#define TK_RST_DIR(x) REG_SHADOW_SET(R_PORT_PB_DIR, port_pb_dir_shadow, CONFIG_ETRAX_DS1302_RSTBIT, x)
|
||||
#endif
|
||||
|
||||
|
||||
#define TK_SDA_OUT(x) REG_SHADOW_SET(R_PORT_PB_DATA, port_pb_data_shadow, CONFIG_ETRAX_DS1302_SDABIT, x)
|
||||
#define TK_SCL_OUT(x) REG_SHADOW_SET(R_PORT_PB_DATA, port_pb_data_shadow, CONFIG_ETRAX_DS1302_SCLBIT, x)
|
||||
|
||||
#define TK_SDA_IN() ((*R_PORT_PB_READ >> CONFIG_ETRAX_DS1302_SDABIT) & 1)
|
||||
/* 1 is out, 0 is in */
|
||||
#define TK_SDA_DIR(x) REG_SHADOW_SET(R_PORT_PB_DIR, port_pb_dir_shadow, CONFIG_ETRAX_DS1302_SDABIT, x)
|
||||
#define TK_SCL_DIR(x) REG_SHADOW_SET(R_PORT_PB_DIR, port_pb_dir_shadow, CONFIG_ETRAX_DS1302_SCLBIT, x)
|
||||
|
||||
|
||||
/*
|
||||
* The reason for tempudelay and not udelay is that loops_per_usec
|
||||
* (used in udelay) is not set when functions here are called from time.c
|
||||
*/
|
||||
|
||||
static void tempudelay(int usecs)
|
||||
{
|
||||
volatile int loops;
|
||||
|
||||
for(loops = usecs * 12; loops > 0; loops--)
|
||||
/* nothing */;
|
||||
}
|
||||
|
||||
|
||||
/* Send 8 bits. */
|
||||
static void
|
||||
out_byte(unsigned char x)
|
||||
{
|
||||
int i;
|
||||
TK_SDA_DIR(1);
|
||||
for (i = 8; i--;) {
|
||||
/* The chip latches incoming bits on the rising edge of SCL. */
|
||||
TK_SCL_OUT(0);
|
||||
TK_SDA_OUT(x & 1);
|
||||
tempudelay(1);
|
||||
TK_SCL_OUT(1);
|
||||
tempudelay(1);
|
||||
x >>= 1;
|
||||
}
|
||||
TK_SDA_DIR(0);
|
||||
}
|
||||
|
||||
static unsigned char
|
||||
in_byte(void)
|
||||
{
|
||||
unsigned char x = 0;
|
||||
int i;
|
||||
|
||||
/* Read byte. Bits come LSB first, on the falling edge of SCL.
|
||||
* Assume SDA is in input direction already.
|
||||
*/
|
||||
TK_SDA_DIR(0);
|
||||
|
||||
for (i = 8; i--;) {
|
||||
TK_SCL_OUT(0);
|
||||
tempudelay(1);
|
||||
x >>= 1;
|
||||
x |= (TK_SDA_IN() << 7);
|
||||
TK_SCL_OUT(1);
|
||||
tempudelay(1);
|
||||
}
|
||||
|
||||
return x;
|
||||
}
|
||||
|
||||
/* Prepares for a transaction by de-activating RST (active-low). */
|
||||
|
||||
static void
|
||||
start(void)
|
||||
{
|
||||
TK_SCL_OUT(0);
|
||||
tempudelay(1);
|
||||
TK_RST_OUT(0);
|
||||
tempudelay(5);
|
||||
TK_RST_OUT(1);
|
||||
}
|
||||
|
||||
/* Ends a transaction by taking RST active again. */
|
||||
|
||||
static void
|
||||
stop(void)
|
||||
{
|
||||
tempudelay(2);
|
||||
TK_RST_OUT(0);
|
||||
}
|
||||
|
||||
/* Enable writing. */
|
||||
|
||||
static void
|
||||
ds1302_wenable(void)
|
||||
{
|
||||
start();
|
||||
out_byte(0x8e); /* Write control register */
|
||||
out_byte(0x00); /* Disable write protect bit 7 = 0 */
|
||||
stop();
|
||||
}
|
||||
|
||||
/* Disable writing. */
|
||||
|
||||
static void
|
||||
ds1302_wdisable(void)
|
||||
{
|
||||
start();
|
||||
out_byte(0x8e); /* Write control register */
|
||||
out_byte(0x80); /* Disable write protect bit 7 = 0 */
|
||||
stop();
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* Read a byte from the selected register in the DS1302. */
|
||||
|
||||
unsigned char
|
||||
ds1302_readreg(int reg)
|
||||
{
|
||||
unsigned char x;
|
||||
|
||||
start();
|
||||
out_byte(0x81 | (reg << 1)); /* read register */
|
||||
x = in_byte();
|
||||
stop();
|
||||
|
||||
return x;
|
||||
}
|
||||
|
||||
/* Write a byte to the selected register. */
|
||||
|
||||
void
|
||||
ds1302_writereg(int reg, unsigned char val)
|
||||
{
|
||||
#ifndef CONFIG_ETRAX_RTC_READONLY
|
||||
int do_writereg = 1;
|
||||
#else
|
||||
int do_writereg = 0;
|
||||
|
||||
if (reg == RTC_TRICKLECHARGER)
|
||||
do_writereg = 1;
|
||||
#endif
|
||||
|
||||
if (do_writereg) {
|
||||
ds1302_wenable();
|
||||
start();
|
||||
out_byte(0x80 | (reg << 1)); /* write register */
|
||||
out_byte(val);
|
||||
stop();
|
||||
ds1302_wdisable();
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
get_rtc_time(struct rtc_time *rtc_tm)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
rtc_tm->tm_sec = CMOS_READ(RTC_SECONDS);
|
||||
rtc_tm->tm_min = CMOS_READ(RTC_MINUTES);
|
||||
rtc_tm->tm_hour = CMOS_READ(RTC_HOURS);
|
||||
rtc_tm->tm_mday = CMOS_READ(RTC_DAY_OF_MONTH);
|
||||
rtc_tm->tm_mon = CMOS_READ(RTC_MONTH);
|
||||
rtc_tm->tm_year = CMOS_READ(RTC_YEAR);
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
|
||||
rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
|
||||
rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
|
||||
rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
|
||||
rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
|
||||
rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
|
||||
|
||||
/*
|
||||
* Account for differences between how the RTC uses the values
|
||||
* and how they are defined in a struct rtc_time;
|
||||
*/
|
||||
|
||||
if (rtc_tm->tm_year <= 69)
|
||||
rtc_tm->tm_year += 100;
|
||||
|
||||
rtc_tm->tm_mon--;
|
||||
}
|
||||
|
||||
static unsigned char days_in_mo[] =
|
||||
{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
|
||||
|
||||
/* ioctl that supports RTC_RD_TIME and RTC_SET_TIME (read and set time/date). */
|
||||
|
||||
static int rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
switch(cmd) {
|
||||
case RTC_RD_TIME: /* read the time/date from RTC */
|
||||
{
|
||||
struct rtc_time rtc_tm;
|
||||
|
||||
memset(&rtc_tm, 0, sizeof (struct rtc_time));
|
||||
get_rtc_time(&rtc_tm);
|
||||
if (copy_to_user((struct rtc_time*)arg, &rtc_tm, sizeof(struct rtc_time)))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
case RTC_SET_TIME: /* set the RTC */
|
||||
{
|
||||
struct rtc_time rtc_tm;
|
||||
unsigned char mon, day, hrs, min, sec, leap_yr;
|
||||
unsigned int yrs;
|
||||
|
||||
if (!capable(CAP_SYS_TIME))
|
||||
return -EPERM;
|
||||
|
||||
if (copy_from_user(&rtc_tm, (struct rtc_time*)arg, sizeof(struct rtc_time)))
|
||||
return -EFAULT;
|
||||
|
||||
yrs = rtc_tm.tm_year + 1900;
|
||||
mon = rtc_tm.tm_mon + 1; /* tm_mon starts at zero */
|
||||
day = rtc_tm.tm_mday;
|
||||
hrs = rtc_tm.tm_hour;
|
||||
min = rtc_tm.tm_min;
|
||||
sec = rtc_tm.tm_sec;
|
||||
|
||||
|
||||
if ((yrs < 1970) || (yrs > 2069))
|
||||
return -EINVAL;
|
||||
|
||||
leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
|
||||
|
||||
if ((mon > 12) || (day == 0))
|
||||
return -EINVAL;
|
||||
|
||||
if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
|
||||
return -EINVAL;
|
||||
|
||||
if ((hrs >= 24) || (min >= 60) || (sec >= 60))
|
||||
return -EINVAL;
|
||||
|
||||
if (yrs >= 2000)
|
||||
yrs -= 2000; /* RTC (0, 1, ... 69) */
|
||||
else
|
||||
yrs -= 1900; /* RTC (70, 71, ... 99) */
|
||||
|
||||
sec = bin2bcd(sec);
|
||||
min = bin2bcd(min);
|
||||
hrs = bin2bcd(hrs);
|
||||
day = bin2bcd(day);
|
||||
mon = bin2bcd(mon);
|
||||
yrs = bin2bcd(yrs);
|
||||
|
||||
local_irq_save(flags);
|
||||
CMOS_WRITE(yrs, RTC_YEAR);
|
||||
CMOS_WRITE(mon, RTC_MONTH);
|
||||
CMOS_WRITE(day, RTC_DAY_OF_MONTH);
|
||||
CMOS_WRITE(hrs, RTC_HOURS);
|
||||
CMOS_WRITE(min, RTC_MINUTES);
|
||||
CMOS_WRITE(sec, RTC_SECONDS);
|
||||
local_irq_restore(flags);
|
||||
|
||||
/* Notice that at this point, the RTC is updated but
|
||||
* the kernel is still running with the old time.
|
||||
* You need to set that separately with settimeofday
|
||||
* or adjtimex.
|
||||
*/
|
||||
return 0;
|
||||
}
|
||||
|
||||
case RTC_SET_CHARGE: /* set the RTC TRICKLE CHARGE register */
|
||||
{
|
||||
int tcs_val;
|
||||
|
||||
if (!capable(CAP_SYS_TIME))
|
||||
return -EPERM;
|
||||
|
||||
if(copy_from_user(&tcs_val, (int*)arg, sizeof(int)))
|
||||
return -EFAULT;
|
||||
|
||||
tcs_val = RTC_TCR_PATTERN | (tcs_val & 0x0F);
|
||||
ds1302_writereg(RTC_TRICKLECHARGER, tcs_val);
|
||||
return 0;
|
||||
}
|
||||
case RTC_VL_READ:
|
||||
{
|
||||
/* TODO:
|
||||
* Implement voltage low detection support
|
||||
*/
|
||||
printk(KERN_WARNING "DS1302: RTC Voltage Low detection"
|
||||
" is not supported\n");
|
||||
return 0;
|
||||
}
|
||||
case RTC_VL_CLR:
|
||||
{
|
||||
/* TODO:
|
||||
* Nothing to do since Voltage Low detection is not supported
|
||||
*/
|
||||
return 0;
|
||||
}
|
||||
default:
|
||||
return -ENOIOCTLCMD;
|
||||
}
|
||||
}
|
||||
|
||||
static long rtc_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&ds1302_mutex);
|
||||
ret = rtc_ioctl(file, cmd, arg);
|
||||
mutex_unlock(&ds1302_mutex);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void
|
||||
print_rtc_status(void)
|
||||
{
|
||||
struct rtc_time tm;
|
||||
|
||||
get_rtc_time(&tm);
|
||||
|
||||
/*
|
||||
* There is no way to tell if the luser has the RTC set for local
|
||||
* time or for Universal Standard Time (GMT). Probably local though.
|
||||
*/
|
||||
|
||||
printk(KERN_INFO "rtc_time\t: %02d:%02d:%02d\n",
|
||||
tm.tm_hour, tm.tm_min, tm.tm_sec);
|
||||
printk(KERN_INFO "rtc_date\t: %04d-%02d-%02d\n",
|
||||
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
|
||||
}
|
||||
|
||||
/* The various file operations we support. */
|
||||
|
||||
static const struct file_operations rtc_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.unlocked_ioctl = rtc_unlocked_ioctl,
|
||||
.llseek = noop_llseek,
|
||||
};
|
||||
|
||||
/* Probe for the chip by writing something to its RAM and try reading it back. */
|
||||
|
||||
#define MAGIC_PATTERN 0x42
|
||||
|
||||
static int __init
|
||||
ds1302_probe(void)
|
||||
{
|
||||
int retval, res;
|
||||
|
||||
TK_RST_DIR(1);
|
||||
TK_SCL_DIR(1);
|
||||
TK_SDA_DIR(0);
|
||||
|
||||
/* Try to talk to timekeeper. */
|
||||
|
||||
ds1302_wenable();
|
||||
start();
|
||||
out_byte(0xc0); /* write RAM byte 0 */
|
||||
out_byte(MAGIC_PATTERN); /* write something magic */
|
||||
start();
|
||||
out_byte(0xc1); /* read RAM byte 0 */
|
||||
|
||||
if((res = in_byte()) == MAGIC_PATTERN) {
|
||||
stop();
|
||||
ds1302_wdisable();
|
||||
printk(KERN_INFO "%s: RTC found.\n", ds1302_name);
|
||||
printk(KERN_INFO "%s: SDA, SCL, RST on PB%i, PB%i, %s%i\n",
|
||||
ds1302_name,
|
||||
CONFIG_ETRAX_DS1302_SDABIT,
|
||||
CONFIG_ETRAX_DS1302_SCLBIT,
|
||||
#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT
|
||||
"GENIO",
|
||||
#else
|
||||
"PB",
|
||||
#endif
|
||||
CONFIG_ETRAX_DS1302_RSTBIT);
|
||||
print_rtc_status();
|
||||
retval = 1;
|
||||
} else {
|
||||
stop();
|
||||
retval = 0;
|
||||
}
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
/* Just probe for the RTC and register the device to handle the ioctl needed. */
|
||||
|
||||
int __init
|
||||
ds1302_init(void)
|
||||
{
|
||||
#ifdef CONFIG_ETRAX_I2C
|
||||
i2c_init();
|
||||
#endif
|
||||
|
||||
if (!ds1302_probe()) {
|
||||
#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT
|
||||
#if CONFIG_ETRAX_DS1302_RSTBIT == 27
|
||||
/*
|
||||
* The only way to set g27 to output is to enable ATA.
|
||||
*
|
||||
* Make sure that R_GEN_CONFIG is setup correct.
|
||||
*/
|
||||
/* Allocating the ATA interface will grab almost all
|
||||
* pins in I/O groups a, b, c and d. A consequence of
|
||||
* allocating the ATA interface is that the fixed
|
||||
* interfaces shared RAM, parallel port 0, parallel
|
||||
* port 1, parallel port W, SCSI-8 port 0, SCSI-8 port
|
||||
* 1, SCSI-W, serial port 2, serial port 3,
|
||||
* synchronous serial port 3 and USB port 2 and almost
|
||||
* all GPIO pins on port g cannot be used.
|
||||
*/
|
||||
if (cris_request_io_interface(if_ata, "ds1302/ATA")) {
|
||||
printk(KERN_WARNING "ds1302: Failed to get IO interface\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
#elif CONFIG_ETRAX_DS1302_RSTBIT == 0
|
||||
if (cris_io_interface_allocate_pins(if_gpio_grp_a,
|
||||
'g',
|
||||
CONFIG_ETRAX_DS1302_RSTBIT,
|
||||
CONFIG_ETRAX_DS1302_RSTBIT)) {
|
||||
printk(KERN_WARNING "ds1302: Failed to get IO interface\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Set the direction of this bit to out. */
|
||||
genconfig_shadow = ((genconfig_shadow &
|
||||
~IO_MASK(R_GEN_CONFIG, g0dir)) |
|
||||
(IO_STATE(R_GEN_CONFIG, g0dir, out)));
|
||||
*R_GEN_CONFIG = genconfig_shadow;
|
||||
#endif
|
||||
if (!ds1302_probe()) {
|
||||
printk(KERN_WARNING "%s: RTC not found.\n", ds1302_name);
|
||||
return -1;
|
||||
}
|
||||
#else
|
||||
printk(KERN_WARNING "%s: RTC not found.\n", ds1302_name);
|
||||
return -1;
|
||||
#endif
|
||||
}
|
||||
/* Initialise trickle charger */
|
||||
ds1302_writereg(RTC_TRICKLECHARGER,
|
||||
RTC_TCR_PATTERN |(CONFIG_ETRAX_DS1302_TRICKLE_CHARGE & 0x0F));
|
||||
/* Start clock by resetting CLOCK_HALT */
|
||||
ds1302_writereg(RTC_SECONDS, (ds1302_readreg(RTC_SECONDS) & 0x7F));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __init ds1302_register(void)
|
||||
{
|
||||
ds1302_init();
|
||||
if (register_chrdev(RTC_MAJOR_NR, ds1302_name, &rtc_fops)) {
|
||||
printk(KERN_INFO "%s: unable to get major %d for rtc\n",
|
||||
ds1302_name, RTC_MAJOR_NR);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
module_init(ds1302_register);
|
||||
|
|
@ -1,380 +0,0 @@
|
|||
/*
|
||||
* PCF8563 RTC
|
||||
*
|
||||
* From Phillips' datasheet:
|
||||
*
|
||||
* The PCF8563 is a CMOS real-time clock/calendar optimized for low power
|
||||
* consumption. A programmable clock output, interrupt output and voltage
|
||||
* low detector are also provided. All address and data are transferred
|
||||
* serially via two-line bidirectional I2C-bus. Maximum bus speed is
|
||||
* 400 kbits/s. The built-in word address register is incremented
|
||||
* automatically after each written or read byte.
|
||||
*
|
||||
* Copyright (c) 2002-2007, Axis Communications AB
|
||||
* All rights reserved.
|
||||
*
|
||||
* Author: Tobias Anderberg <tobiasa@axis.com>.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/ioctl.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/bcd.h>
|
||||
#include <linux/mutex.h>
|
||||
|
||||
#include <asm/uaccess.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/rtc.h>
|
||||
|
||||
#include "i2c.h"
|
||||
|
||||
#define PCF8563_MAJOR 121 /* Local major number. */
|
||||
#define DEVICE_NAME "rtc" /* Name which is registered in /proc/devices. */
|
||||
#define PCF8563_NAME "PCF8563"
|
||||
#define DRIVER_VERSION "$Revision: 1.24 $"
|
||||
|
||||
/* I2C bus slave registers. */
|
||||
#define RTC_I2C_READ 0xa3
|
||||
#define RTC_I2C_WRITE 0xa2
|
||||
|
||||
/* Two simple wrapper macros, saves a few keystrokes. */
|
||||
#define rtc_read(x) i2c_readreg(RTC_I2C_READ, x)
|
||||
#define rtc_write(x,y) i2c_writereg(RTC_I2C_WRITE, x, y)
|
||||
|
||||
static DEFINE_MUTEX(pcf8563_mutex);
|
||||
static DEFINE_MUTEX(rtc_lock); /* Protect state etc */
|
||||
|
||||
static const unsigned char days_in_month[] =
|
||||
{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
|
||||
|
||||
static long pcf8563_unlocked_ioctl(struct file *, unsigned int, unsigned long);
|
||||
|
||||
/* Cache VL bit value read at driver init since writing the RTC_SECOND
|
||||
* register clears the VL status.
|
||||
*/
|
||||
static int voltage_low;
|
||||
|
||||
static const struct file_operations pcf8563_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.unlocked_ioctl = pcf8563_unlocked_ioctl,
|
||||
.llseek = noop_llseek,
|
||||
};
|
||||
|
||||
unsigned char
|
||||
pcf8563_readreg(int reg)
|
||||
{
|
||||
unsigned char res = rtc_read(reg);
|
||||
|
||||
/* The PCF8563 does not return 0 for unimplemented bits. */
|
||||
switch (reg) {
|
||||
case RTC_SECONDS:
|
||||
case RTC_MINUTES:
|
||||
res &= 0x7F;
|
||||
break;
|
||||
case RTC_HOURS:
|
||||
case RTC_DAY_OF_MONTH:
|
||||
res &= 0x3F;
|
||||
break;
|
||||
case RTC_WEEKDAY:
|
||||
res &= 0x07;
|
||||
break;
|
||||
case RTC_MONTH:
|
||||
res &= 0x1F;
|
||||
break;
|
||||
case RTC_CONTROL1:
|
||||
res &= 0xA8;
|
||||
break;
|
||||
case RTC_CONTROL2:
|
||||
res &= 0x1F;
|
||||
break;
|
||||
case RTC_CLOCKOUT_FREQ:
|
||||
case RTC_TIMER_CONTROL:
|
||||
res &= 0x83;
|
||||
break;
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
||||
void
|
||||
pcf8563_writereg(int reg, unsigned char val)
|
||||
{
|
||||
rtc_write(reg, val);
|
||||
}
|
||||
|
||||
void
|
||||
get_rtc_time(struct rtc_time *tm)
|
||||
{
|
||||
tm->tm_sec = rtc_read(RTC_SECONDS);
|
||||
tm->tm_min = rtc_read(RTC_MINUTES);
|
||||
tm->tm_hour = rtc_read(RTC_HOURS);
|
||||
tm->tm_mday = rtc_read(RTC_DAY_OF_MONTH);
|
||||
tm->tm_wday = rtc_read(RTC_WEEKDAY);
|
||||
tm->tm_mon = rtc_read(RTC_MONTH);
|
||||
tm->tm_year = rtc_read(RTC_YEAR);
|
||||
|
||||
if (tm->tm_sec & 0x80) {
|
||||
printk(KERN_ERR "%s: RTC Voltage Low - reliable date/time "
|
||||
"information is no longer guaranteed!\n", PCF8563_NAME);
|
||||
}
|
||||
|
||||
tm->tm_year = bcd2bin(tm->tm_year) +
|
||||
((tm->tm_mon & 0x80) ? 100 : 0);
|
||||
tm->tm_sec &= 0x7F;
|
||||
tm->tm_min &= 0x7F;
|
||||
tm->tm_hour &= 0x3F;
|
||||
tm->tm_mday &= 0x3F;
|
||||
tm->tm_wday &= 0x07; /* Not coded in BCD. */
|
||||
tm->tm_mon &= 0x1F;
|
||||
|
||||
tm->tm_sec = bcd2bin(tm->tm_sec);
|
||||
tm->tm_min = bcd2bin(tm->tm_min);
|
||||
tm->tm_hour = bcd2bin(tm->tm_hour);
|
||||
tm->tm_mday = bcd2bin(tm->tm_mday);
|
||||
tm->tm_mon = bcd2bin(tm->tm_mon);
|
||||
tm->tm_mon--; /* Month is 1..12 in RTC but 0..11 in linux */
|
||||
}
|
||||
|
||||
int __init
|
||||
pcf8563_init(void)
|
||||
{
|
||||
static int res;
|
||||
static int first = 1;
|
||||
|
||||
if (!first)
|
||||
return res;
|
||||
first = 0;
|
||||
|
||||
/* Initiate the i2c protocol. */
|
||||
res = i2c_init();
|
||||
if (res < 0) {
|
||||
printk(KERN_CRIT "pcf8563_init: Failed to init i2c.\n");
|
||||
return res;
|
||||
}
|
||||
|
||||
/*
|
||||
* First of all we need to reset the chip. This is done by
|
||||
* clearing control1, control2 and clk freq and resetting
|
||||
* all alarms.
|
||||
*/
|
||||
if (rtc_write(RTC_CONTROL1, 0x00) < 0)
|
||||
goto err;
|
||||
|
||||
if (rtc_write(RTC_CONTROL2, 0x00) < 0)
|
||||
goto err;
|
||||
|
||||
if (rtc_write(RTC_CLOCKOUT_FREQ, 0x00) < 0)
|
||||
goto err;
|
||||
|
||||
if (rtc_write(RTC_TIMER_CONTROL, 0x03) < 0)
|
||||
goto err;
|
||||
|
||||
/* Reset the alarms. */
|
||||
if (rtc_write(RTC_MINUTE_ALARM, 0x80) < 0)
|
||||
goto err;
|
||||
|
||||
if (rtc_write(RTC_HOUR_ALARM, 0x80) < 0)
|
||||
goto err;
|
||||
|
||||
if (rtc_write(RTC_DAY_ALARM, 0x80) < 0)
|
||||
goto err;
|
||||
|
||||
if (rtc_write(RTC_WEEKDAY_ALARM, 0x80) < 0)
|
||||
goto err;
|
||||
|
||||
/* Check for low voltage, and warn about it. */
|
||||
if (rtc_read(RTC_SECONDS) & 0x80) {
|
||||
voltage_low = 1;
|
||||
printk(KERN_WARNING "%s: RTC Voltage Low - reliable "
|
||||
"date/time information is no longer guaranteed!\n",
|
||||
PCF8563_NAME);
|
||||
}
|
||||
|
||||
return res;
|
||||
|
||||
err:
|
||||
printk(KERN_INFO "%s: Error initializing chip.\n", PCF8563_NAME);
|
||||
res = -1;
|
||||
return res;
|
||||
}
|
||||
|
||||
void __exit
|
||||
pcf8563_exit(void)
|
||||
{
|
||||
unregister_chrdev(PCF8563_MAJOR, DEVICE_NAME);
|
||||
}
|
||||
|
||||
/*
|
||||
* ioctl calls for this driver. Why return -ENOTTY upon error? Because
|
||||
* POSIX says so!
|
||||
*/
|
||||
static int pcf8563_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
/* Some sanity checks. */
|
||||
if (_IOC_TYPE(cmd) != RTC_MAGIC)
|
||||
return -ENOTTY;
|
||||
|
||||
if (_IOC_NR(cmd) > RTC_MAX_IOCTL)
|
||||
return -ENOTTY;
|
||||
|
||||
switch (cmd) {
|
||||
case RTC_RD_TIME:
|
||||
{
|
||||
struct rtc_time tm;
|
||||
|
||||
mutex_lock(&rtc_lock);
|
||||
memset(&tm, 0, sizeof tm);
|
||||
get_rtc_time(&tm);
|
||||
|
||||
if (copy_to_user((struct rtc_time *) arg, &tm,
|
||||
sizeof tm)) {
|
||||
mutex_unlock(&rtc_lock);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
mutex_unlock(&rtc_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
case RTC_SET_TIME:
|
||||
{
|
||||
int leap;
|
||||
int year;
|
||||
int century;
|
||||
struct rtc_time tm;
|
||||
|
||||
memset(&tm, 0, sizeof tm);
|
||||
if (!capable(CAP_SYS_TIME))
|
||||
return -EPERM;
|
||||
|
||||
if (copy_from_user(&tm, (struct rtc_time *) arg, sizeof tm))
|
||||
return -EFAULT;
|
||||
|
||||
/* Convert from struct tm to struct rtc_time. */
|
||||
tm.tm_year += 1900;
|
||||
tm.tm_mon += 1;
|
||||
|
||||
/*
|
||||
* Check if tm.tm_year is a leap year. A year is a leap
|
||||
* year if it is divisible by 4 but not 100, except
|
||||
* that years divisible by 400 _are_ leap years.
|
||||
*/
|
||||
year = tm.tm_year;
|
||||
leap = (tm.tm_mon == 2) &&
|
||||
((year % 4 == 0 && year % 100 != 0) || year % 400 == 0);
|
||||
|
||||
/* Perform some sanity checks. */
|
||||
if ((tm.tm_year < 1970) ||
|
||||
(tm.tm_mon > 12) ||
|
||||
(tm.tm_mday == 0) ||
|
||||
(tm.tm_mday > days_in_month[tm.tm_mon] + leap) ||
|
||||
(tm.tm_wday >= 7) ||
|
||||
(tm.tm_hour >= 24) ||
|
||||
(tm.tm_min >= 60) ||
|
||||
(tm.tm_sec >= 60))
|
||||
return -EINVAL;
|
||||
|
||||
century = (tm.tm_year >= 2000) ? 0x80 : 0;
|
||||
tm.tm_year = tm.tm_year % 100;
|
||||
|
||||
tm.tm_year = bin2bcd(tm.tm_year);
|
||||
tm.tm_mon = bin2bcd(tm.tm_mon);
|
||||
tm.tm_mday = bin2bcd(tm.tm_mday);
|
||||
tm.tm_hour = bin2bcd(tm.tm_hour);
|
||||
tm.tm_min = bin2bcd(tm.tm_min);
|
||||
tm.tm_sec = bin2bcd(tm.tm_sec);
|
||||
tm.tm_mon |= century;
|
||||
|
||||
mutex_lock(&rtc_lock);
|
||||
|
||||
rtc_write(RTC_YEAR, tm.tm_year);
|
||||
rtc_write(RTC_MONTH, tm.tm_mon);
|
||||
rtc_write(RTC_WEEKDAY, tm.tm_wday); /* Not coded in BCD. */
|
||||
rtc_write(RTC_DAY_OF_MONTH, tm.tm_mday);
|
||||
rtc_write(RTC_HOURS, tm.tm_hour);
|
||||
rtc_write(RTC_MINUTES, tm.tm_min);
|
||||
rtc_write(RTC_SECONDS, tm.tm_sec);
|
||||
|
||||
mutex_unlock(&rtc_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
case RTC_VL_READ:
|
||||
if (voltage_low) {
|
||||
printk(KERN_ERR "%s: RTC Voltage Low - "
|
||||
"reliable date/time information is no "
|
||||
"longer guaranteed!\n", PCF8563_NAME);
|
||||
}
|
||||
|
||||
if (copy_to_user((int *) arg, &voltage_low, sizeof(int)))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
|
||||
case RTC_VL_CLR:
|
||||
{
|
||||
/* Clear the VL bit in the seconds register in case
|
||||
* the time has not been set already (which would
|
||||
* have cleared it). This does not really matter
|
||||
* because of the cached voltage_low value but do it
|
||||
* anyway for consistency. */
|
||||
|
||||
int ret = rtc_read(RTC_SECONDS);
|
||||
|
||||
rtc_write(RTC_SECONDS, (ret & 0x7F));
|
||||
|
||||
/* Clear the cached value. */
|
||||
voltage_low = 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
default:
|
||||
return -ENOTTY;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&pcf8563_mutex);
|
||||
ret = pcf8563_ioctl(filp, cmd, arg);
|
||||
mutex_unlock(&pcf8563_mutex);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __init pcf8563_register(void)
|
||||
{
|
||||
if (pcf8563_init() < 0) {
|
||||
printk(KERN_INFO "%s: Unable to initialize Real-Time Clock "
|
||||
"Driver, %s\n", PCF8563_NAME, DRIVER_VERSION);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (register_chrdev(PCF8563_MAJOR, DEVICE_NAME, &pcf8563_fops) < 0) {
|
||||
printk(KERN_INFO "%s: Unable to get major number %d for RTC device.\n",
|
||||
PCF8563_NAME, PCF8563_MAJOR);
|
||||
return -1;
|
||||
}
|
||||
|
||||
printk(KERN_INFO "%s Real-Time Clock Driver, %s\n", PCF8563_NAME,
|
||||
DRIVER_VERSION);
|
||||
|
||||
/* Check for low voltage, and warn about it. */
|
||||
if (voltage_low) {
|
||||
printk(KERN_WARNING "%s: RTC Voltage Low - reliable date/time "
|
||||
"information is no longer guaranteed!\n", PCF8563_NAME);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
module_init(pcf8563_register);
|
||||
module_exit(pcf8563_exit);
|
||||
|
|
@ -21,8 +21,6 @@
|
|||
#include <asm/io.h>
|
||||
#include <asm/irq.h>
|
||||
#include <asm/delay.h>
|
||||
#include <asm/rtc.h>
|
||||
|
||||
|
||||
#include <arch/svinto.h>
|
||||
#include <asm/fasttimer.h>
|
||||
|
|
|
|||
|
|
@ -19,16 +19,12 @@
|
|||
#include <asm/signal.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/delay.h>
|
||||
#include <asm/rtc.h>
|
||||
#include <asm/irq_regs.h>
|
||||
|
||||
/* define this if you need to use print_timestamp */
|
||||
/* it will make jiffies at 96 hz instead of 100 hz though */
|
||||
#undef USE_CASCADE_TIMERS
|
||||
|
||||
extern int set_rtc_mmss(unsigned long nowtime);
|
||||
extern int have_rtc;
|
||||
|
||||
unsigned long get_ns_in_jiffie(void)
|
||||
{
|
||||
unsigned char timer_count, t1;
|
||||
|
|
@ -203,11 +199,6 @@ time_init(void)
|
|||
*/
|
||||
loops_per_usec = 50;
|
||||
|
||||
if(RTC_INIT() < 0)
|
||||
have_rtc = 0;
|
||||
else
|
||||
have_rtc = 1;
|
||||
|
||||
/* Setup the etrax timers
|
||||
* Base frequency is 25000 hz, divider 250 -> 100 HZ
|
||||
* In normal mode, we use timer0, so timer1 is free. In cascade
|
||||
|
|
|
|||
|
|
@ -18,7 +18,6 @@
|
|||
#include <asm/signal.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/delay.h>
|
||||
#include <asm/rtc.h>
|
||||
#include <asm/irq.h>
|
||||
#include <asm/irq_regs.h>
|
||||
|
||||
|
|
@ -67,7 +66,6 @@ unsigned long timer_regs[NR_CPUS] =
|
|||
};
|
||||
|
||||
extern int set_rtc_mmss(unsigned long nowtime);
|
||||
extern int have_rtc;
|
||||
|
||||
#ifdef CONFIG_CPU_FREQ
|
||||
static int
|
||||
|
|
@ -265,11 +263,6 @@ void __init time_init(void)
|
|||
*/
|
||||
loops_per_usec = 50;
|
||||
|
||||
if(RTC_INIT() < 0)
|
||||
have_rtc = 0;
|
||||
else
|
||||
have_rtc = 1;
|
||||
|
||||
/* Start CPU local timer. */
|
||||
cris_timer_init();
|
||||
|
||||
|
|
|
|||
|
|
@ -6,5 +6,4 @@ header-y += arch-v32/
|
|||
header-y += ethernet.h
|
||||
header-y += etraxgpio.h
|
||||
header-y += rs485.h
|
||||
header-y += rtc.h
|
||||
header-y += sync_serial.h
|
||||
|
|
|
|||
|
|
@ -1,107 +0,0 @@
|
|||
|
||||
#ifndef __RTC_H__
|
||||
#define __RTC_H__
|
||||
|
||||
#ifdef CONFIG_ETRAX_DS1302
|
||||
/* Dallas DS1302 clock/calendar register numbers. */
|
||||
# define RTC_SECONDS 0
|
||||
# define RTC_MINUTES 1
|
||||
# define RTC_HOURS 2
|
||||
# define RTC_DAY_OF_MONTH 3
|
||||
# define RTC_MONTH 4
|
||||
# define RTC_WEEKDAY 5
|
||||
# define RTC_YEAR 6
|
||||
# define RTC_CONTROL 7
|
||||
|
||||
/* Bits in CONTROL register. */
|
||||
# define RTC_CONTROL_WRITEPROTECT 0x80
|
||||
# define RTC_TRICKLECHARGER 8
|
||||
|
||||
/* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */
|
||||
# define RTC_TCR_PATTERN 0xA0 /* 1010xxxx */
|
||||
# define RTC_TCR_1DIOD 0x04 /* xxxx01xx */
|
||||
# define RTC_TCR_2DIOD 0x08 /* xxxx10xx */
|
||||
# define RTC_TCR_DISABLED 0x00 /* xxxxxx00 Disabled */
|
||||
# define RTC_TCR_2KOHM 0x01 /* xxxxxx01 2KOhm */
|
||||
# define RTC_TCR_4KOHM 0x02 /* xxxxxx10 4kOhm */
|
||||
# define RTC_TCR_8KOHM 0x03 /* xxxxxx11 8kOhm */
|
||||
|
||||
#elif defined(CONFIG_ETRAX_PCF8563)
|
||||
/* I2C bus slave registers. */
|
||||
# define RTC_I2C_READ 0xa3
|
||||
# define RTC_I2C_WRITE 0xa2
|
||||
|
||||
/* Phillips PCF8563 registers. */
|
||||
# define RTC_CONTROL1 0x00 /* Control/Status register 1. */
|
||||
# define RTC_CONTROL2 0x01 /* Control/Status register 2. */
|
||||
# define RTC_CLOCKOUT_FREQ 0x0d /* CLKOUT frequency. */
|
||||
# define RTC_TIMER_CONTROL 0x0e /* Timer control. */
|
||||
# define RTC_TIMER_CNTDOWN 0x0f /* Timer countdown. */
|
||||
|
||||
/* BCD encoded clock registers. */
|
||||
# define RTC_SECONDS 0x02
|
||||
# define RTC_MINUTES 0x03
|
||||
# define RTC_HOURS 0x04
|
||||
# define RTC_DAY_OF_MONTH 0x05
|
||||
# define RTC_WEEKDAY 0x06 /* Not coded in BCD! */
|
||||
# define RTC_MONTH 0x07
|
||||
# define RTC_YEAR 0x08
|
||||
# define RTC_MINUTE_ALARM 0x09
|
||||
# define RTC_HOUR_ALARM 0x0a
|
||||
# define RTC_DAY_ALARM 0x0b
|
||||
# define RTC_WEEKDAY_ALARM 0x0c
|
||||
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_ETRAX_DS1302
|
||||
extern unsigned char ds1302_readreg(int reg);
|
||||
extern void ds1302_writereg(int reg, unsigned char val);
|
||||
extern int ds1302_init(void);
|
||||
# define CMOS_READ(x) ds1302_readreg(x)
|
||||
# define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
|
||||
# define RTC_INIT() ds1302_init()
|
||||
#elif defined(CONFIG_ETRAX_PCF8563)
|
||||
extern unsigned char pcf8563_readreg(int reg);
|
||||
extern void pcf8563_writereg(int reg, unsigned char val);
|
||||
extern int pcf8563_init(void);
|
||||
# define CMOS_READ(x) pcf8563_readreg(x)
|
||||
# define CMOS_WRITE(val,reg) pcf8563_writereg(reg,val)
|
||||
# define RTC_INIT() pcf8563_init()
|
||||
#else
|
||||
/* No RTC configured so we shouldn't try to access any. */
|
||||
# define CMOS_READ(x) 42
|
||||
# define CMOS_WRITE(x,y)
|
||||
# define RTC_INIT() (-1)
|
||||
#endif
|
||||
|
||||
/*
|
||||
* The struct used to pass data via the following ioctl. Similar to the
|
||||
* struct tm in <time.h>, but it needs to be here so that the kernel
|
||||
* source is self contained, allowing cross-compiles, etc. etc.
|
||||
*/
|
||||
struct rtc_time {
|
||||
int tm_sec;
|
||||
int tm_min;
|
||||
int tm_hour;
|
||||
int tm_mday;
|
||||
int tm_mon;
|
||||
int tm_year;
|
||||
int tm_wday;
|
||||
int tm_yday;
|
||||
int tm_isdst;
|
||||
};
|
||||
|
||||
/* ioctl() calls that are permitted to the /dev/rtc interface. */
|
||||
#define RTC_MAGIC 'p'
|
||||
/* Read RTC time. */
|
||||
#define RTC_RD_TIME _IOR(RTC_MAGIC, 0x09, struct rtc_time)
|
||||
/* Set RTC time. */
|
||||
#define RTC_SET_TIME _IOW(RTC_MAGIC, 0x0a, struct rtc_time)
|
||||
#define RTC_SET_CHARGE _IOW(RTC_MAGIC, 0x0b, int)
|
||||
/* Voltage low detector */
|
||||
#define RTC_VL_READ _IOR(RTC_MAGIC, 0x13, int)
|
||||
/* Clear voltage low information */
|
||||
#define RTC_VL_CLR _IO(RTC_MAGIC, 0x14)
|
||||
#define RTC_MAX_IOCTL 0x14
|
||||
|
||||
#endif /* __RTC_H__ */
|
||||
|
|
@ -21,7 +21,6 @@
|
|||
*
|
||||
*/
|
||||
|
||||
#include <asm/rtc.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/param.h>
|
||||
|
|
@ -32,7 +31,8 @@
|
|||
#include <linux/profile.h>
|
||||
#include <linux/sched.h> /* just for sched_clock() - funny that */
|
||||
|
||||
int have_rtc; /* used to remember if we have an RTC or not */;
|
||||
|
||||
#define D(x)
|
||||
|
||||
#define TICK_SIZE tick
|
||||
|
||||
|
|
@ -50,78 +50,16 @@ u32 arch_gettimeoffset(void)
|
|||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* BUG: This routine does not handle hour overflow properly; it just
|
||||
* sets the minutes. Usually you'll only notice that after reboot!
|
||||
*/
|
||||
|
||||
int set_rtc_mmss(unsigned long nowtime)
|
||||
{
|
||||
int retval = 0;
|
||||
int real_seconds, real_minutes, cmos_minutes;
|
||||
|
||||
printk(KERN_DEBUG "set_rtc_mmss(%lu)\n", nowtime);
|
||||
|
||||
if(!have_rtc)
|
||||
return 0;
|
||||
|
||||
cmos_minutes = CMOS_READ(RTC_MINUTES);
|
||||
cmos_minutes = bcd2bin(cmos_minutes);
|
||||
|
||||
/*
|
||||
* since we're only adjusting minutes and seconds,
|
||||
* don't interfere with hour overflow. This avoids
|
||||
* messing with unknown time zones but requires your
|
||||
* RTC not to be off by more than 15 minutes
|
||||
*/
|
||||
real_seconds = nowtime % 60;
|
||||
real_minutes = nowtime / 60;
|
||||
if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
|
||||
real_minutes += 30; /* correct for half hour time zone */
|
||||
real_minutes %= 60;
|
||||
|
||||
if (abs(real_minutes - cmos_minutes) < 30) {
|
||||
real_seconds = bin2bcd(real_seconds);
|
||||
real_minutes = bin2bcd(real_minutes);
|
||||
CMOS_WRITE(real_seconds,RTC_SECONDS);
|
||||
CMOS_WRITE(real_minutes,RTC_MINUTES);
|
||||
} else {
|
||||
printk_once(KERN_NOTICE
|
||||
"set_rtc_mmss: can't update from %d to %d\n",
|
||||
cmos_minutes, real_minutes);
|
||||
retval = -1;
|
||||
}
|
||||
|
||||
return retval;
|
||||
D(printk(KERN_DEBUG "set_rtc_mmss(%lu)\n", nowtime));
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* grab the time from the RTC chip */
|
||||
|
||||
unsigned long
|
||||
get_cmos_time(void)
|
||||
unsigned long get_cmos_time(void)
|
||||
{
|
||||
unsigned int year, mon, day, hour, min, sec;
|
||||
if(!have_rtc)
|
||||
return 0;
|
||||
|
||||
sec = CMOS_READ(RTC_SECONDS);
|
||||
min = CMOS_READ(RTC_MINUTES);
|
||||
hour = CMOS_READ(RTC_HOURS);
|
||||
day = CMOS_READ(RTC_DAY_OF_MONTH);
|
||||
mon = CMOS_READ(RTC_MONTH);
|
||||
year = CMOS_READ(RTC_YEAR);
|
||||
|
||||
sec = bcd2bin(sec);
|
||||
min = bcd2bin(min);
|
||||
hour = bcd2bin(hour);
|
||||
day = bcd2bin(day);
|
||||
mon = bcd2bin(mon);
|
||||
year = bcd2bin(year);
|
||||
|
||||
if ((year += 1900) < 1970)
|
||||
year += 100;
|
||||
|
||||
return mktime(year, mon, day, hour, min, sec);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -132,7 +70,7 @@ int update_persistent_clock(struct timespec now)
|
|||
|
||||
void read_persistent_clock(struct timespec *ts)
|
||||
{
|
||||
ts->tv_sec = get_cmos_time();
|
||||
ts->tv_sec = 0;
|
||||
ts->tv_nsec = 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
Reference in New Issue