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59 lines
1.5 KiB
59 lines
1.5 KiB
/*
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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/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;
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/* Reset the interrupt controller */
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HW_ICOLL_CTRL_CLR(BM_ICOLL_CTRL_CLKGATE);
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udelay(10);
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HW_ICOLL_CTRL_CLR(BM_ICOLL_CTRL_SFTRST);
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udelay(10);
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HW_ICOLL_CTRL_SET(BM_ICOLL_CTRL_SFTRST);
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while (!(HW_ICOLL_CTRL_RD() & BM_ICOLL_CTRL_CLKGATE))
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continue;
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HW_ICOLL_CTRL_CLR(BM_ICOLL_CTRL_SFTRST | BM_ICOLL_CTRL_CLKGATE);
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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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HW_ICOLL_LEVELACK_WR(1);
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HW_ICOLL_LEVELACK_WR(2);
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HW_ICOLL_LEVELACK_WR(4);
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HW_ICOLL_LEVELACK_WR(8);
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HW_ICOLL_VECTOR_WR(0);
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/* Barrier */
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(void) HW_ICOLL_STAT_RD();
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}
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