54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2011 by Marcin Bukat
|
|
*
|
|
* 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 "config.h"
|
|
#include "system.h"
|
|
#include "kernel.h"
|
|
|
|
/* rockchip rk27xx driver for the kernel timer */
|
|
|
|
/* sys timer ISR */
|
|
void INT_TIMER0(void)
|
|
{
|
|
/* clear interrupt */
|
|
TMR0CON &= ~0x04;
|
|
|
|
call_tick_tasks(); /* Run through the list of tick tasks */
|
|
}
|
|
|
|
/* this assumes 50MHz APB bus frequency */
|
|
void tick_start(unsigned int interval_in_ms)
|
|
{
|
|
unsigned int cycles = 50000 * interval_in_ms;
|
|
|
|
/* enable timer clock */
|
|
SCU_CLKCFG &= ~CLKCFG_TIMER;
|
|
|
|
/* configure timer0 */
|
|
TMR0LR = cycles;
|
|
TMR0CON = (1<<8) | (1<<7) | (1<<1); /* periodic, 1/1, interrupt enable */
|
|
|
|
/* unmask timer0 interrupt */
|
|
INTC_IMR |= IRQ_ARM_TIMER0;
|
|
|
|
/* enable timer0 interrupt */
|
|
INTC_IECR |= IRQ_ARM_TIMER0;
|
|
}
|
|
|