예제 #1
0
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;
}
예제 #2
0
파일: ds1302.c 프로젝트: sarnobat/knoppix
int __init
ds1302_init(void) 
{ 
	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.
		 */
    		genconfig_shadow = ((genconfig_shadow &
				     ~IO_MASK(R_GEN_CONFIG, ata)) | 
				   (IO_STATE(R_GEN_CONFIG, ata, select)));    
    		*R_GEN_CONFIG = genconfig_shadow;
#elif CONFIG_ETRAX_DS1302_RSTBIT == 0
		
		/* 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())
      			return -1;
#else
    		return -1;
#endif
  	}
  
	/* Initialise trickle charger */
	ds1302_writereg(RTC_TRICKLECHARGER,
			RTC_TCR_PATTERN |(CONFIG_ETRAX_DS1302_TRICKLE_CHARGE & 0x0F));
	return 0;
}
예제 #3
0
int __init
ds1302_init(void) 
{
	i2c_init();

	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.
		 */
    		genconfig_shadow = ((genconfig_shadow &
				     ~IO_MASK(R_GEN_CONFIG, ata)) | 
				   (IO_STATE(R_GEN_CONFIG, ata, select)));    
    		*R_GEN_CONFIG = genconfig_shadow;
#elif CONFIG_ETRAX_DS1302_RSTBIT == 0
		
		/* 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;
}
예제 #4
0
static int
rtc_ioctl(struct inode *inode, 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) */

			BIN_TO_BCD(sec);
			BIN_TO_BCD(min);
			BIN_TO_BCD(hrs);
			BIN_TO_BCD(day);
			BIN_TO_BCD(mon);
			BIN_TO_BCD(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_VLOW_RD:
		{
			/* TODO:
			 * Implement voltage low detection support
			 */
			printk(KERN_WARNING "DS1302: RTC Voltage Low detection"
			       " is not supported\n");
			return 0;
		}
		case RTC_VLOW_SET:
		{
			/* TODO:
			 * Nothing to do since Voltage Low detection is not supported
			 */
			return 0;
		}
		default:
			return -ENOIOCTLCMD;
	}
}
예제 #5
0
static long 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));
			mutex_lock(&rtc_mutex);
			get_rtc_time(&rtc_tm);
			mutex_unlock(&rtc_mutex);
			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);

			mutex_lock(&rtc_mutex);
			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);
			mutex_unlock(&rtc_mutex);

			/* 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;

			mutex_lock(&rtc_mutex);
			tcs_val = RTC_TCR_PATTERN | (tcs_val & 0x0F);
			ds1302_writereg(RTC_TRICKLECHARGER, tcs_val);
			mutex_unlock(&rtc_mutex);
			return 0;
		}
		default:
			return -EINVAL;
	}
}