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/*
* Freescale STMP37XX/STMP378X common interrupt handling code
*
* Author: Vladislav Buzov <vbuzov@embeddedalley.com>
*
* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/sysdev.h>
#include <mach/stmp3xxx.h>
#include <mach/regs-icoll.h>
void __init stmp3xxx_init_irq(struct irq_chip *chip)
{
unsigned int i;
/* Reset the interrupt controller */
HW_ICOLL_CTRL_CLR(BM_ICOLL_CTRL_CLKGATE);
udelay(10);
HW_ICOLL_CTRL_CLR(BM_ICOLL_CTRL_SFTRST);
udelay(10);
HW_ICOLL_CTRL_SET(BM_ICOLL_CTRL_SFTRST);
while (!(HW_ICOLL_CTRL_RD() & BM_ICOLL_CTRL_CLKGATE))
continue;
HW_ICOLL_CTRL_CLR(BM_ICOLL_CTRL_SFTRST | BM_ICOLL_CTRL_CLKGATE);
/* Disable all interrupts initially */
for (i = 0; i < NR_REAL_IRQS; i++) {
chip->mask(i);
set_irq_chip(i, chip);
set_irq_handler(i, handle_level_irq);
set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
}
/* Ensure vector is cleared */
HW_ICOLL_LEVELACK_WR(1);
HW_ICOLL_LEVELACK_WR(2);
HW_ICOLL_LEVELACK_WR(4);
HW_ICOLL_LEVELACK_WR(8);
HW_ICOLL_VECTOR_WR(0);
/* Barrier */
(void) HW_ICOLL_STAT_RD();
}
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