ARM: 5649/1: bcmring: add bcmring timer function

/*****************************************************************************

* Copyright 2004 - 2008 Broadcom Corporation.  All rights reserved.

*

* Unless you and Broadcom execute a separate written software license

* agreement governing use of this software, this software is licensed to you

* under the terms of the GNU General Public License version 2, available at

* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").

*

* Notwithstanding the above, under no circumstances may you combine this

* software in any way with any other Broadcom software provided under a

* license other than the GPL, without Broadcom's express prior written

* consent.

*****************************************************************************/

/*

*

*****************************************************************************

*

*  timer.h

*

*  PURPOSE:

*

*

*

*  NOTES:

*

*****************************************************************************/

#if !defined(BCM_LINUX_TIMER_H)

#define BCM_LINUX_TIMER_H

#if defined(__KERNEL__)

/* ---- Include Files ---------------------------------------------------- */

/* ---- Constants and Types ---------------------------------------------- */

typedef unsigned int timer_tick_count_t;

typedef unsigned int timer_tick_rate_t;

typedef unsigned int timer_msec_t;

/* ---- Variable Externs ------------------------------------------------- */

/* ---- Function Prototypes ---------------------------------------------- */

/****************************************************************************

*

*  timer_get_tick_count

*

*

***************************************************************************/

timer_tick_count_t timer_get_tick_count(void);

/****************************************************************************

*

*  timer_get_tick_rate

*

*

***************************************************************************/

timer_tick_rate_t timer_get_tick_rate(void);

/****************************************************************************

*

*  timer_get_msec

*

*

***************************************************************************/

timer_msec_t timer_get_msec(void);

/****************************************************************************

*

*  timer_ticks_to_msec

*

*

***************************************************************************/

timer_msec_t timer_ticks_to_msec(timer_tick_count_t ticks);

#endif /* __KERNEL__ */

#endif /* BCM_LINUX_TIMER_H */

/*

 *

 *  Integrator architecture timex specifications

 *

 *  Copyright (C) 1999 ARM Limited

 *

 * 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 program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

/*

 * Specifies the number of ticks per second

 */

#define CLOCK_TICK_RATE		100000 /* REG_SMT_TICKS_PER_SEC */

/*****************************************************************************

* Copyright 2003 - 2008 Broadcom Corporation.  All rights reserved.

*

* Unless you and Broadcom execute a separate written software license

* agreement governing use of this software, this software is licensed to you

* under the terms of the GNU General Public License version 2, available at

* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").

*

* Notwithstanding the above, under no circumstances may you combine this

* software in any way with any other Broadcom software provided under a

* license other than the GPL, without Broadcom's express prior written

* consent.

*****************************************************************************/

#include <linux/version.h>

#include <linux/types.h>

#include <linux/module.h>

#include <csp/tmrHw.h>

#include <mach/timer.h>

/* The core.c file initializes timers 1 and 3 as a linux clocksource. */

/* The real time clock should probably be the real linux clocksource. */

/* In the meantime, this file should agree with core.c as to the */

/* profiling timer. If the clocksource is moved to rtc later, then */

/* we can init the profiling timer here instead. */

/* Timer 1 provides 25MHz resolution syncrhonized to scheduling and APM timing */

/* Timer 3 provides bus freqeuncy sychronized to ACLK, but spread spectrum will */

/* affect synchronization with scheduling and APM timing. */

#define PROF_TIMER 1

timer_tick_rate_t timer_get_tick_rate(void)

{

	return tmrHw_getCountRate(PROF_TIMER);

}

timer_tick_count_t timer_get_tick_count(void)

{

	return tmrHw_GetCurrentCount(PROF_TIMER);	/* change downcounter to upcounter */

}

timer_msec_t timer_ticks_to_msec(timer_tick_count_t ticks)

{

	static int tickRateMsec;

	if (tickRateMsec == 0) {

		tickRateMsec = timer_get_tick_rate() / 1000;

	}

	return ticks / tickRateMsec;

}

timer_msec_t timer_get_msec(void)

{

	return timer_ticks_to_msec(timer_get_tick_count());

}

EXPORT_SYMBOL(timer_get_tick_count);

EXPORT_SYMBOL(timer_ticks_to_msec);

EXPORT_SYMBOL(timer_get_tick_rate);

EXPORT_SYMBOL(timer_get_msec);