forked from Minki/linux
bf62e86269
Now the drivers are responsible to clear the irq in the respective device, which seems to be the normal thing to do. So the ack'ing of the timer irq moved to time.c. Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/*
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* arch/arm/mach-ns9xxx/irq.c
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*
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* Copyright (C) 2006,2007 by Digi International Inc.
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#include <linux/interrupt.h>
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#include <asm/mach/irq.h>
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#include <asm/mach-types.h>
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#include <asm/arch-ns9xxx/regs-sys.h>
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#include <asm/arch-ns9xxx/irqs.h>
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#include <asm/arch-ns9xxx/board.h>
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#include "generic.h"
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static void ns9xxx_mask_irq(unsigned int irq)
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{
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/* XXX: better use cpp symbols */
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SYS_IC(irq / 4) &= ~(1 << (7 + 8 * (3 - (irq & 3))));
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}
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static void ns9xxx_ack_irq(unsigned int irq)
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{
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SYS_ISRADDR = 0;
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}
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static void ns9xxx_maskack_irq(unsigned int irq)
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{
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ns9xxx_mask_irq(irq);
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ns9xxx_ack_irq(irq);
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}
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static void ns9xxx_unmask_irq(unsigned int irq)
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{
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/* XXX: better use cpp symbols */
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SYS_IC(irq / 4) |= 1 << (7 + 8 * (3 - (irq & 3)));
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}
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static struct irq_chip ns9xxx_chip = {
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.ack = ns9xxx_ack_irq,
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.mask = ns9xxx_mask_irq,
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.mask_ack = ns9xxx_maskack_irq,
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.unmask = ns9xxx_unmask_irq,
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};
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void __init ns9xxx_init_irq(void)
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{
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int i;
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/* disable all IRQs */
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for (i = 0; i < 8; ++i)
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SYS_IC(i) = (4 * i) << 24 | (4 * i + 1) << 16 |
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(4 * i + 2) << 8 | (4 * i + 3);
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/* simple interrupt prio table:
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* prio(x) < prio(y) <=> x < y
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*/
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for (i = 0; i < 32; ++i)
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SYS_IVA(i) = i;
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for (i = IRQ_WATCHDOG; i <= IRQ_EXT3; ++i) {
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set_irq_chip(i, &ns9xxx_chip);
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set_irq_handler(i, handle_level_irq);
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set_irq_flags(i, IRQF_VALID);
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}
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}
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