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bd0b9ac405
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>
156 lines
3.4 KiB
C
156 lines
3.4 KiB
C
/* linux/arch/arm/mach-s3c2410/bast-irq.c
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*
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* Copyright 2003-2005 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* http://www.simtec.co.uk/products/EB2410ITX/
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include <asm/mach/irq.h>
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#include <mach/hardware.h>
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#include <mach/regs-irq.h>
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#include "bast.h"
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#define irqdbf(x...)
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#define irqdbf2(x...)
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/* handle PC104 ISA interrupts from the system CPLD */
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/* table of ISA irq nos to the relevant mask... zero means
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* the irq is not implemented
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*/
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static unsigned char bast_pc104_irqmasks[] = {
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0, /* 0 */
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0, /* 1 */
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0, /* 2 */
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1, /* 3 */
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0, /* 4 */
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2, /* 5 */
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0, /* 6 */
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4, /* 7 */
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0, /* 8 */
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0, /* 9 */
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8, /* 10 */
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0, /* 11 */
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0, /* 12 */
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0, /* 13 */
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0, /* 14 */
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0, /* 15 */
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};
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static unsigned char bast_pc104_irqs[] = { 3, 5, 7, 10 };
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static void
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bast_pc104_mask(struct irq_data *data)
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{
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unsigned long temp;
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temp = __raw_readb(BAST_VA_PC104_IRQMASK);
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temp &= ~bast_pc104_irqmasks[data->irq];
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__raw_writeb(temp, BAST_VA_PC104_IRQMASK);
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}
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static void
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bast_pc104_maskack(struct irq_data *data)
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{
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struct irq_desc *desc = irq_desc + BAST_IRQ_ISA;
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bast_pc104_mask(data);
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desc->irq_data.chip->irq_ack(&desc->irq_data);
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}
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static void
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bast_pc104_unmask(struct irq_data *data)
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{
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unsigned long temp;
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temp = __raw_readb(BAST_VA_PC104_IRQMASK);
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temp |= bast_pc104_irqmasks[data->irq];
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__raw_writeb(temp, BAST_VA_PC104_IRQMASK);
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}
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static struct irq_chip bast_pc104_chip = {
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.irq_mask = bast_pc104_mask,
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.irq_unmask = bast_pc104_unmask,
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.irq_ack = bast_pc104_maskack
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};
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static void bast_irq_pc104_demux(struct irq_desc *desc)
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{
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unsigned int stat;
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unsigned int irqno;
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int i;
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stat = __raw_readb(BAST_VA_PC104_IRQREQ) & 0xf;
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if (unlikely(stat == 0)) {
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/* ack if we get an irq with nothing (ie, startup) */
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desc = irq_desc + BAST_IRQ_ISA;
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desc->irq_data.chip->irq_ack(&desc->irq_data);
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} else {
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/* handle the IRQ */
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for (i = 0; stat != 0; i++, stat >>= 1) {
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if (stat & 1) {
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irqno = bast_pc104_irqs[i];
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generic_handle_irq(irqno);
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}
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}
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}
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}
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static __init int bast_irq_init(void)
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{
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unsigned int i;
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if (machine_is_bast()) {
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printk(KERN_INFO "BAST PC104 IRQ routing, Copyright 2005 Simtec Electronics\n");
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/* zap all the IRQs */
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__raw_writeb(0x0, BAST_VA_PC104_IRQMASK);
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irq_set_chained_handler(BAST_IRQ_ISA, bast_irq_pc104_demux);
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/* register our IRQs */
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for (i = 0; i < 4; i++) {
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unsigned int irqno = bast_pc104_irqs[i];
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irq_set_chip_and_handler(irqno, &bast_pc104_chip,
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handle_level_irq);
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irq_clear_status_flags(irqno, IRQ_NOREQUEST);
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}
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}
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return 0;
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}
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arch_initcall(bast_irq_init);
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