1e582fc737
Seperate the IRQ power management code out of the pm.c file, and add it to the relevant system class devices. Also make the suspend and resume code take notice of the fact these registers can be moved by compile time code. Add fix from Ilya Yanok to also save the INTSUBMSK over sleep. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
132 lines
3.1 KiB
C
132 lines
3.1 KiB
C
/* linux/arch/arm/mach-s3c2410/s3c2440-irq.c
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*
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* Copyright (c) 2003,2004 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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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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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/ptrace.h>
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#include <linux/sysdev.h>
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#include <asm/hardware.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/mach/irq.h>
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#include <asm/arch/regs-irq.h>
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#include <asm/arch/regs-gpio.h>
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#include "cpu.h"
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#include "pm.h"
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#include "irq.h"
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/* WDT/AC97 */
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static void s3c_irq_demux_wdtac97(unsigned int irq,
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struct irqdesc *desc,
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struct pt_regs *regs)
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{
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unsigned int subsrc, submsk;
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struct irqdesc *mydesc;
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/* read the current pending interrupts, and the mask
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* for what it is available */
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subsrc = __raw_readl(S3C2410_SUBSRCPND);
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submsk = __raw_readl(S3C2410_INTSUBMSK);
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subsrc &= ~submsk;
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subsrc >>= 13;
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subsrc &= 3;
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if (subsrc != 0) {
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if (subsrc & 1) {
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mydesc = irq_desc + IRQ_S3C2440_WDT;
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desc_handle_irq(IRQ_S3C2440_WDT, mydesc, regs);
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}
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if (subsrc & 2) {
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mydesc = irq_desc + IRQ_S3C2440_AC97;
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desc_handle_irq(IRQ_S3C2440_AC97, mydesc, regs);
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}
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}
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}
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#define INTMSK_WDT (1UL << (IRQ_WDT - IRQ_EINT0))
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static void
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s3c_irq_wdtac97_mask(unsigned int irqno)
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{
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s3c_irqsub_mask(irqno, INTMSK_WDT, 3<<13);
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}
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static void
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s3c_irq_wdtac97_unmask(unsigned int irqno)
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{
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s3c_irqsub_unmask(irqno, INTMSK_WDT);
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}
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static void
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s3c_irq_wdtac97_ack(unsigned int irqno)
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{
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s3c_irqsub_maskack(irqno, INTMSK_WDT, 3<<13);
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}
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static struct irqchip s3c_irq_wdtac97 = {
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.mask = s3c_irq_wdtac97_mask,
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.unmask = s3c_irq_wdtac97_unmask,
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.ack = s3c_irq_wdtac97_ack,
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};
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static int s3c2440_irq_add(struct sys_device *sysdev)
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{
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unsigned int irqno;
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printk("S3C2440: IRQ Support\n");
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/* add new chained handler for wdt, ac7 */
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set_irq_chip(IRQ_WDT, &s3c_irq_level_chip);
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set_irq_handler(IRQ_WDT, do_level_IRQ);
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set_irq_chained_handler(IRQ_WDT, s3c_irq_demux_wdtac97);
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for (irqno = IRQ_S3C2440_WDT; irqno <= IRQ_S3C2440_AC97; irqno++) {
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set_irq_chip(irqno, &s3c_irq_wdtac97);
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set_irq_handler(irqno, do_level_IRQ);
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set_irq_flags(irqno, IRQF_VALID);
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}
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return 0;
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}
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static struct sysdev_driver s3c2440_irq_driver = {
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.add = s3c2440_irq_add,
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};
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static int s3c2440_irq_init(void)
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{
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return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver);
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}
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arch_initcall(s3c2440_irq_init);
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