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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2011 by Amaury Pouly
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "timrot-imx233.h"
#include "clkctrl-imx233.h"
imx233_timer_fn_t timer_fns[4];
#define define_timer_irq(nr) \
void INT_TIMER##nr(void) \
{ \
if(timer_fns[nr]) \
timer_fns[nr](); \
__REG_CLR(HW_TIMROT_TIMCTRL(nr)) = HW_TIMROT_TIMCTRL__IRQ; \
}
define_timer_irq(0)
define_timer_irq(1)
define_timer_irq(2)
define_timer_irq(3)
void imx233_setup_timer(unsigned timer_nr, bool reload, unsigned count,
unsigned src, unsigned prescale, bool polarity, imx233_timer_fn_t fn)
{
timer_fns[timer_nr] = fn;
HW_TIMROT_TIMCTRL(timer_nr) = src | prescale;
if(polarity)
__REG_SET(HW_TIMROT_TIMCTRL(timer_nr)) = HW_TIMROT_TIMCTRL__POLARITY;
if(reload)
{
__REG_SET(HW_TIMROT_TIMCTRL(timer_nr)) = HW_TIMROT_TIMCTRL__RELOAD;
/* manual says count - 1 for reload timers */
HW_TIMROT_TIMCOUNT(timer_nr) = count - 1;
}
else
HW_TIMROT_TIMCOUNT(timer_nr) = count;
/* only enable interrupt if function is set */
if(fn != NULL)
{
/* enable interrupt */
imx233_enable_interrupt(INT_SRC_TIMER(timer_nr), true);
/* clear irq bit and enable */
__REG_CLR(HW_TIMROT_TIMCTRL(timer_nr)) = HW_TIMROT_TIMCTRL__IRQ;
__REG_SET(HW_TIMROT_TIMCTRL(timer_nr)) = HW_TIMROT_TIMCTRL__IRQ_EN;
}
else
imx233_enable_interrupt(INT_SRC_TIMER(timer_nr), false);
/* finally update */
__REG_SET(HW_TIMROT_TIMCTRL(timer_nr)) = HW_TIMROT_TIMCTRL__UPDATE;
}
void imx233_timrot_init(void)
{
__REG_CLR(HW_TIMROT_ROTCTRL) = __BLOCK_CLKGATE;
__REG_CLR(HW_TIMROT_ROTCTRL) = __BLOCK_SFTRST;
/* enable xtal path to timrot */
imx233_enable_timrot_xtal_clk32k(true);
}
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