Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit bedd78ca authored by Russell King's avatar Russell King Committed by Russell King
Browse files

[RTC] remove old ARM rtc library code 



Now that all drivers using it are gone, remove the old ARM RTC library.

Acked-by: default avatarAlessandro Zummo <a.zummo@towertech.it>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 797276ec

arch/arm/common/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -2,7 +2,6 @@ 
# Makefile for the linux kernel.

#



obj-y				+= rtctime.o

obj-$(CONFIG_ARM_GIC)		+= gic.o

obj-$(CONFIG_ARM_VIC)		+= vic.o

obj-$(CONFIG_ICST525)		+= icst525.o

arch/arm/common/rtctime.c

deleted100644 → 0
+0 −434
Original line number Diff line number Diff line 
/*

 *  linux/arch/arm/common/rtctime.c

 *

 *  Copyright (C) 2003 Deep Blue Solutions Ltd.

 *  Based on sa1100-rtc.c, Nils Faerber, CIH, Nicolas Pitre.

 *  Based on rtc.c by Paul Gortmaker

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/time.h>

#include <linux/rtc.h>

#include <linux/poll.h>

#include <linux/proc_fs.h>

#include <linux/miscdevice.h>

#include <linux/spinlock.h>

#include <linux/capability.h>

#include <linux/device.h>

#include <linux/mutex.h>



#include <asm/rtc.h>



static DECLARE_WAIT_QUEUE_HEAD(rtc_wait);

static struct fasync_struct *rtc_async_queue;



/*

 * rtc_lock protects rtc_irq_data

 */

static DEFINE_SPINLOCK(rtc_lock);

static unsigned long rtc_irq_data;



/*

 * rtc_sem protects rtc_inuse and rtc_ops

 */

static DEFINE_MUTEX(rtc_mutex);

static unsigned long rtc_inuse;

static struct rtc_ops *rtc_ops;



#define rtc_epoch 1900UL



/*

 * Calculate the next alarm time given the requested alarm time mask

 * and the current time.

 */

void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, struct rtc_time *alrm)

{

	unsigned long next_time;

	unsigned long now_time;



	next->tm_year = now->tm_year;

	next->tm_mon = now->tm_mon;

	next->tm_mday = now->tm_mday;

	next->tm_hour = alrm->tm_hour;

	next->tm_min = alrm->tm_min;

	next->tm_sec = alrm->tm_sec;



	rtc_tm_to_time(now, &now_time);

	rtc_tm_to_time(next, &next_time);



	if (next_time < now_time) {

		/* Advance one day */

		next_time += 60 * 60 * 24;

		rtc_time_to_tm(next_time, next);

	}

}

EXPORT_SYMBOL(rtc_next_alarm_time);



static inline int rtc_arm_read_time(struct rtc_ops *ops, struct rtc_time *tm)

{

	memset(tm, 0, sizeof(struct rtc_time));

	return ops->read_time(tm);

}



static inline int rtc_arm_set_time(struct rtc_ops *ops, struct rtc_time *tm)

{

	int ret;



	ret = rtc_valid_tm(tm);

	if (ret == 0)

		ret = ops->set_time(tm);



	return ret;

}



static inline int rtc_arm_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)

{

	int ret = -EINVAL;

	if (ops->read_alarm) {

		memset(alrm, 0, sizeof(struct rtc_wkalrm));

		ret = ops->read_alarm(alrm);

	}

	return ret;

}



static inline int rtc_arm_set_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)

{

	int ret = -EINVAL;

	if (ops->set_alarm)

		ret = ops->set_alarm(alrm);

	return ret;

}



void rtc_update(unsigned long num, unsigned long events)

{

	spin_lock(&rtc_lock);

	rtc_irq_data = (rtc_irq_data + (num << 8)) | events;

	spin_unlock(&rtc_lock);



	wake_up_interruptible(&rtc_wait);

	kill_fasync(&rtc_async_queue, SIGIO, POLL_IN);

}

EXPORT_SYMBOL(rtc_update);





static ssize_t

rtc_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)

{

	DECLARE_WAITQUEUE(wait, current);

	unsigned long data;

	ssize_t ret;



	if (count < sizeof(unsigned long))

		return -EINVAL;



	add_wait_queue(&rtc_wait, &wait);

	do {

		__set_current_state(TASK_INTERRUPTIBLE);



		spin_lock_irq(&rtc_lock);

		data = rtc_irq_data;

		rtc_irq_data = 0;

		spin_unlock_irq(&rtc_lock);



		if (data != 0) {

			ret = 0;

			break;

		}

		if (file->f_flags & O_NONBLOCK) {

			ret = -EAGAIN;

			break;

		}

		if (signal_pending(current)) {

			ret = -ERESTARTSYS;

			break;

		}

		schedule();

	} while (1);

	set_current_state(TASK_RUNNING);

	remove_wait_queue(&rtc_wait, &wait);



	if (ret == 0) {

		ret = put_user(data, (unsigned long __user *)buf);

		if (ret == 0)

			ret = sizeof(unsigned long);

	}

	return ret;

}



static unsigned int rtc_poll(struct file *file, poll_table *wait)

{

	unsigned long data;



	poll_wait(file, &rtc_wait, wait);



	spin_lock_irq(&rtc_lock);

	data = rtc_irq_data;

	spin_unlock_irq(&rtc_lock);



	return data != 0 ? POLLIN | POLLRDNORM : 0;

}



static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,

		     unsigned long arg)

{

	struct rtc_ops *ops = file->private_data;

	struct rtc_time tm;

	struct rtc_wkalrm alrm;

	void __user *uarg = (void __user *)arg;

	int ret = -EINVAL;



	switch (cmd) {

	case RTC_ALM_READ:

		ret = rtc_arm_read_alarm(ops, &alrm);

		if (ret)

			break;

		ret = copy_to_user(uarg, &alrm.time, sizeof(tm));

		if (ret)

			ret = -EFAULT;

		break;



	case RTC_ALM_SET:

		ret = copy_from_user(&alrm.time, uarg, sizeof(tm));

		if (ret) {

			ret = -EFAULT;

			break;

		}

		alrm.enabled = 0;

		alrm.pending = 0;

		alrm.time.tm_mday = -1;

		alrm.time.tm_mon = -1;

		alrm.time.tm_year = -1;

		alrm.time.tm_wday = -1;

		alrm.time.tm_yday = -1;

		alrm.time.tm_isdst = -1;

		ret = rtc_arm_set_alarm(ops, &alrm);

		break;



	case RTC_RD_TIME:

		ret = rtc_arm_read_time(ops, &tm);

		if (ret)

			break;

		ret = copy_to_user(uarg, &tm, sizeof(tm));

		if (ret)

			ret = -EFAULT;

		break;



	case RTC_SET_TIME:

		if (!capable(CAP_SYS_TIME)) {

			ret = -EACCES;

			break;

		}

		ret = copy_from_user(&tm, uarg, sizeof(tm));

		if (ret) {

			ret = -EFAULT;

			break;

		}

		ret = rtc_arm_set_time(ops, &tm);

		break;



	case RTC_EPOCH_SET:

#ifndef rtc_epoch

		/*

		 * There were no RTC clocks before 1900.

		 */

		if (arg < 1900) {

			ret = -EINVAL;

			break;

		}

		if (!capable(CAP_SYS_TIME)) {

			ret = -EACCES;

			break;

		}

		rtc_epoch = arg;

		ret = 0;

#endif

		break;



	case RTC_EPOCH_READ:

		ret = put_user(rtc_epoch, (unsigned long __user *)uarg);

		break;



	case RTC_WKALM_SET:

		ret = copy_from_user(&alrm, uarg, sizeof(alrm));

		if (ret) {

			ret = -EFAULT;

			break;

		}

		ret = rtc_arm_set_alarm(ops, &alrm);

		break;



	case RTC_WKALM_RD:

		ret = rtc_arm_read_alarm(ops, &alrm);

		if (ret)

			break;

		ret = copy_to_user(uarg, &alrm, sizeof(alrm));

		if (ret)

			ret = -EFAULT;

		break;



	default:

		if (ops->ioctl)

			ret = ops->ioctl(cmd, arg);

		break;

	}

	return ret;

}



static int rtc_open(struct inode *inode, struct file *file)

{

	int ret;



	mutex_lock(&rtc_mutex);



	if (rtc_inuse) {

		ret = -EBUSY;

	} else if (!rtc_ops || !try_module_get(rtc_ops->owner)) {

		ret = -ENODEV;

	} else {

		file->private_data = rtc_ops;



		ret = rtc_ops->open ? rtc_ops->open() : 0;

		if (ret == 0) {

			spin_lock_irq(&rtc_lock);

			rtc_irq_data = 0;

			spin_unlock_irq(&rtc_lock);



			rtc_inuse = 1;

		}

	}

	mutex_unlock(&rtc_mutex);



	return ret;

}



static int rtc_release(struct inode *inode, struct file *file)

{

	struct rtc_ops *ops = file->private_data;



	if (ops->release)

		ops->release();



	spin_lock_irq(&rtc_lock);

	rtc_irq_data = 0;

	spin_unlock_irq(&rtc_lock);



	module_put(rtc_ops->owner);

	rtc_inuse = 0;



	return 0;

}



static int rtc_fasync(int fd, struct file *file, int on)

{

	return fasync_helper(fd, file, on, &rtc_async_queue);

}



static const struct file_operations rtc_fops = {

	.owner		= THIS_MODULE,

	.llseek		= no_llseek,

	.read		= rtc_read,

	.poll		= rtc_poll,

	.ioctl		= rtc_ioctl,

	.open		= rtc_open,

	.release	= rtc_release,

	.fasync		= rtc_fasync,

};



static struct miscdevice rtc_miscdev = {

	.minor		= RTC_MINOR,

	.name		= "rtc",

	.fops		= &rtc_fops,

};





static int rtc_read_proc(char *page, char **start, off_t off, int count, int *eof, void *data)

{

	struct rtc_ops *ops = data;

	struct rtc_wkalrm alrm;

	struct rtc_time tm;

	char *p = page;



	if (rtc_arm_read_time(ops, &tm) == 0) {

		p += sprintf(p,

			"rtc_time\t: %02d:%02d:%02d\n"

			"rtc_date\t: %04d-%02d-%02d\n"

			"rtc_epoch\t: %04lu\n",

			tm.tm_hour, tm.tm_min, tm.tm_sec,

			tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,

			rtc_epoch);

	}



	if (rtc_arm_read_alarm(ops, &alrm) == 0) {

		p += sprintf(p, "alrm_time\t: ");

		if ((unsigned int)alrm.time.tm_hour <= 24)

			p += sprintf(p, "%02d:", alrm.time.tm_hour);

		else

			p += sprintf(p, "**:");

		if ((unsigned int)alrm.time.tm_min <= 59)

			p += sprintf(p, "%02d:", alrm.time.tm_min);

		else

			p += sprintf(p, "**:");

		if ((unsigned int)alrm.time.tm_sec <= 59)

			p += sprintf(p, "%02d\n", alrm.time.tm_sec);

		else

			p += sprintf(p, "**\n");



		p += sprintf(p, "alrm_date\t: ");

		if ((unsigned int)alrm.time.tm_year <= 200)

			p += sprintf(p, "%04d-", alrm.time.tm_year + 1900);

		else

			p += sprintf(p, "****-");

		if ((unsigned int)alrm.time.tm_mon <= 11)

			p += sprintf(p, "%02d-", alrm.time.tm_mon + 1);

		else

			p += sprintf(p, "**-");

		if ((unsigned int)alrm.time.tm_mday <= 31)

			p += sprintf(p, "%02d\n", alrm.time.tm_mday);

		else

			p += sprintf(p, "**\n");

		p += sprintf(p, "alrm_wakeup\t: %s\n",

			     alrm.enabled ? "yes" : "no");

		p += sprintf(p, "alrm_pending\t: %s\n",

			     alrm.pending ? "yes" : "no");

	}



	if (ops->proc)

		p += ops->proc(p);



	return p - page;

}



int register_rtc(struct rtc_ops *ops)

{

	int ret = -EBUSY;



	mutex_lock(&rtc_mutex);

	if (rtc_ops == NULL) {

		rtc_ops = ops;



		ret = misc_register(&rtc_miscdev);

		if (ret == 0)

			create_proc_read_entry("driver/rtc", 0, NULL,

					       rtc_read_proc, ops);

	}

	mutex_unlock(&rtc_mutex);



	return ret;

}

EXPORT_SYMBOL(register_rtc);



void unregister_rtc(struct rtc_ops *rtc)

{

	mutex_lock(&rtc_mutex);

	if (rtc == rtc_ops) {

		remove_proc_entry("driver/rtc", NULL);

		misc_deregister(&rtc_miscdev);

		rtc_ops = NULL;

	}

	mutex_unlock(&rtc_mutex);

}

EXPORT_SYMBOL(unregister_rtc);

include/asm-arm/rtc.h

deleted100644 → 0
+0 −43
Original line number Diff line number Diff line 
/*

 *  linux/include/asm-arm/rtc.h

 *

 *  Copyright (C) 2003 Deep Blue Solutions Ltd.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

#ifndef ASMARM_RTC_H

#define ASMARM_RTC_H



struct module;



struct rtc_ops {

	struct module	*owner;

	int		(*open)(void);

	void		(*release)(void);

	int		(*ioctl)(unsigned int, unsigned long);



	int		(*read_time)(struct rtc_time *);

	int		(*set_time)(struct rtc_time *);

	int		(*read_alarm)(struct rtc_wkalrm *);

	int		(*set_alarm)(struct rtc_wkalrm *);

	int		(*proc)(char *buf);

};



void rtc_next_alarm_time(struct rtc_time *, struct rtc_time *, struct rtc_time *);

void rtc_update(unsigned long, unsigned long);

int register_rtc(struct rtc_ops *);

void unregister_rtc(struct rtc_ops *);



static inline int rtc_periodic_alarm(struct rtc_time *tm)

{

	return  (tm->tm_year == -1) ||

		((unsigned)tm->tm_mon >= 12) ||

		((unsigned)(tm->tm_mday - 1) >= 31) ||

		((unsigned)tm->tm_hour > 23) ||

		((unsigned)tm->tm_min > 59) ||

		((unsigned)tm->tm_sec > 59);

}



#endif