![Thomas Gleixner](/assets/img/avatar_default.png)
Most interrupt flow handlers do not use the irq argument. Those few which use it can retrieve the irq number from the irq descriptor. Remove the argument. Search and replace was done with coccinelle and some extra helper scripts around it. Thanks to Julia for her help! Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Jiang Liu <jiang.liu@linux.intel.com>
183 lines
4.3 KiB
C
183 lines
4.3 KiB
C
/*
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* linux/arch/arm/mach-footbridge/irq.c
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*
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* Copyright (C) 1996-2000 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Changelog:
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* 22-Aug-1998 RMK Restructured IRQ routines
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* 03-Sep-1998 PJB Merged CATS support
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* 20-Jan-1998 RMK Started merge of EBSA286, CATS and NetWinder
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* 26-Jan-1999 PJB Don't use IACK on CATS
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* 16-Mar-1999 RMK Added autodetect of ISA PICs
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*/
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#include <linux/ioport.h>
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/spinlock.h>
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#include <asm/mach/irq.h>
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#include <mach/hardware.h>
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#include <asm/hardware/dec21285.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include "common.h"
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static void isa_mask_pic_lo_irq(struct irq_data *d)
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{
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unsigned int mask = 1 << (d->irq & 7);
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outb(inb(PIC_MASK_LO) | mask, PIC_MASK_LO);
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}
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static void isa_ack_pic_lo_irq(struct irq_data *d)
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{
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unsigned int mask = 1 << (d->irq & 7);
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outb(inb(PIC_MASK_LO) | mask, PIC_MASK_LO);
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outb(0x20, PIC_LO);
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}
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static void isa_unmask_pic_lo_irq(struct irq_data *d)
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{
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unsigned int mask = 1 << (d->irq & 7);
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outb(inb(PIC_MASK_LO) & ~mask, PIC_MASK_LO);
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}
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static struct irq_chip isa_lo_chip = {
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.irq_ack = isa_ack_pic_lo_irq,
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.irq_mask = isa_mask_pic_lo_irq,
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.irq_unmask = isa_unmask_pic_lo_irq,
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};
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static void isa_mask_pic_hi_irq(struct irq_data *d)
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{
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unsigned int mask = 1 << (d->irq & 7);
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outb(inb(PIC_MASK_HI) | mask, PIC_MASK_HI);
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}
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static void isa_ack_pic_hi_irq(struct irq_data *d)
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{
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unsigned int mask = 1 << (d->irq & 7);
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outb(inb(PIC_MASK_HI) | mask, PIC_MASK_HI);
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outb(0x62, PIC_LO);
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outb(0x20, PIC_HI);
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}
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static void isa_unmask_pic_hi_irq(struct irq_data *d)
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{
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unsigned int mask = 1 << (d->irq & 7);
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outb(inb(PIC_MASK_HI) & ~mask, PIC_MASK_HI);
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}
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static struct irq_chip isa_hi_chip = {
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.irq_ack = isa_ack_pic_hi_irq,
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.irq_mask = isa_mask_pic_hi_irq,
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.irq_unmask = isa_unmask_pic_hi_irq,
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};
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static void isa_irq_handler(struct irq_desc *desc)
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{
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unsigned int isa_irq = *(unsigned char *)PCIIACK_BASE;
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if (isa_irq < _ISA_IRQ(0) || isa_irq >= _ISA_IRQ(16)) {
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do_bad_IRQ(desc);
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return;
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}
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generic_handle_irq(isa_irq);
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}
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static struct irqaction irq_cascade = {
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.handler = no_action,
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.name = "cascade",
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};
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static struct resource pic1_resource = {
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.name = "pic1",
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.start = 0x20,
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.end = 0x3f,
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};
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static struct resource pic2_resource = {
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.name = "pic2",
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.start = 0xa0,
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.end = 0xbf,
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};
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void __init isa_init_irq(unsigned int host_irq)
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{
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unsigned int irq;
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/*
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* Setup, and then probe for an ISA PIC
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* If the PIC is not there, then we
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* ignore the PIC.
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*/
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outb(0x11, PIC_LO);
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outb(_ISA_IRQ(0), PIC_MASK_LO); /* IRQ number */
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outb(0x04, PIC_MASK_LO); /* Slave on Ch2 */
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outb(0x01, PIC_MASK_LO); /* x86 */
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outb(0xf5, PIC_MASK_LO); /* pattern: 11110101 */
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outb(0x11, PIC_HI);
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outb(_ISA_IRQ(8), PIC_MASK_HI); /* IRQ number */
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outb(0x02, PIC_MASK_HI); /* Slave on Ch1 */
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outb(0x01, PIC_MASK_HI); /* x86 */
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outb(0xfa, PIC_MASK_HI); /* pattern: 11111010 */
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outb(0x0b, PIC_LO);
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outb(0x0b, PIC_HI);
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if (inb(PIC_MASK_LO) == 0xf5 && inb(PIC_MASK_HI) == 0xfa) {
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outb(0xff, PIC_MASK_LO);/* mask all IRQs */
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outb(0xff, PIC_MASK_HI);/* mask all IRQs */
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} else {
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printk(KERN_INFO "IRQ: ISA PIC not found\n");
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host_irq = (unsigned int)-1;
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}
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if (host_irq != (unsigned int)-1) {
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for (irq = _ISA_IRQ(0); irq < _ISA_IRQ(8); irq++) {
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irq_set_chip_and_handler(irq, &isa_lo_chip,
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handle_level_irq);
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irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
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}
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for (irq = _ISA_IRQ(8); irq < _ISA_IRQ(16); irq++) {
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irq_set_chip_and_handler(irq, &isa_hi_chip,
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handle_level_irq);
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irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
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}
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request_resource(&ioport_resource, &pic1_resource);
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request_resource(&ioport_resource, &pic2_resource);
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setup_irq(IRQ_ISA_CASCADE, &irq_cascade);
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irq_set_chained_handler(host_irq, isa_irq_handler);
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/*
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* On the NetWinder, don't automatically
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* enable ISA IRQ11 when it is requested.
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* There appears to be a missing pull-up
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* resistor on this line.
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*/
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if (machine_is_netwinder())
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irq_modify_status(_ISA_IRQ(11),
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IRQ_NOREQUEST | IRQ_NOPROBE, IRQ_NOAUTOEN);
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}
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}
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