52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
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* Freescale STMP37XX/STMP378X common interrupt handling code
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*
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* Author: Vladislav Buzov <vbuzov@embeddedalley.com>
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*
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* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
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*/
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/*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/sysdev.h>
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#include <mach/stmp3xxx.h>
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#include <mach/platform.h>
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#include <mach/regs-icoll.h>
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void __init stmp3xxx_init_irq(struct irq_chip *chip)
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{
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unsigned int i, lv;
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/* Reset the interrupt controller */
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stmp3xxx_reset_block(REGS_ICOLL_BASE + HW_ICOLL_CTRL, true);
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/* Disable all interrupts initially */
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for (i = 0; i < NR_REAL_IRQS; i++) {
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chip->mask(i);
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set_irq_chip(i, chip);
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set_irq_handler(i, handle_level_irq);
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set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
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}
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/* Ensure vector is cleared */
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for (lv = 0; lv < 4; lv++)
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__raw_writel(1 << lv, REGS_ICOLL_BASE + HW_ICOLL_LEVELACK);
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__raw_writel(0, REGS_ICOLL_BASE + HW_ICOLL_VECTOR);
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/* Barrier */
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(void)__raw_readl(REGS_ICOLL_BASE + HW_ICOLL_STAT);
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}
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