d60d506e6b
* 'next/cleanup-s3c24xx' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: (24 commits) ARM: S3C24XX: remove call to s3c24xx_setup_clocks ARM: S3C24XX: add get_rate for clk_p on S3C2416/2443 ARM: S3C24XX: add get_rate for clk_h on S3C2416/2443 ARM: S3C24XX: remove XXX_setup_clocks method from S3C2443 ARM: S3C24XX: remove obsolete S3C2416_DMA option ARM: S3C24XX: Reuse S3C2443 dma for S3C2416 ARM: S3C24XX: Fix indentation of dma-s3c2443 ARM: S3C24XX: Move device setup files to mach directory ARM: S3C24XX: Consolidate Simtec extensions ARM: S3C24XX: move simtec-specific code to mach directory ARM: S3C24XX: Move common-smdk code to mach directory ARM: S3C24XX: Move s3c2443-clock.c to mach-s3c24xx ARM: s3c2410_defconfig: update s3c2410_defconfig ARM: S3C2443: move mach-s3c2443/* into mach-s3c24xx/ ARM: S3C2440: move mach-s3c2440/* into mach-s3c24xx/ ARM: S3C2416: move mach-s3c2416/* into mach-s3c24xx/ ARM: S3C2412: move mach-s3c2412/* into mach-s3c24xx/ ARM: S3C2410: move mach-s3c2410/* into mach-s3c24xx/ ARM: S3C24XX: change the ARCH_S3C2410 to ARCH_S3C24XX ARM: S3C2410: move s3c2410_baseclk_add to clock.h ...
128 lines
3 KiB
C
128 lines
3 KiB
C
/* linux/arch/arm/mach-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/device.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <asm/mach/irq.h>
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#include <mach/regs-irq.h>
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#include <mach/regs-gpio.h>
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#include <plat/cpu.h>
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#include <plat/pm.h>
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#include <plat/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 irq_desc *desc)
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{
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unsigned int subsrc, submsk;
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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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generic_handle_irq(IRQ_S3C2440_WDT);
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}
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if (subsrc & 2) {
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generic_handle_irq(IRQ_S3C2440_AC97);
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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(struct irq_data *data)
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{
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s3c_irqsub_mask(data->irq, INTMSK_WDT, 3 << 13);
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}
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static void
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s3c_irq_wdtac97_unmask(struct irq_data *data)
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{
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s3c_irqsub_unmask(data->irq, INTMSK_WDT);
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}
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static void
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s3c_irq_wdtac97_ack(struct irq_data *data)
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{
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s3c_irqsub_maskack(data->irq, INTMSK_WDT, 3 << 13);
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}
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static struct irq_chip s3c_irq_wdtac97 = {
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.irq_mask = s3c_irq_wdtac97_mask,
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.irq_unmask = s3c_irq_wdtac97_unmask,
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.irq_ack = s3c_irq_wdtac97_ack,
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};
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static int s3c2440_irq_add(struct device *dev, struct subsys_interface *sif)
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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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irq_set_chip_and_handler(IRQ_WDT, &s3c_irq_level_chip,
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handle_level_irq);
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irq_set_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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irq_set_chip_and_handler(irqno, &s3c_irq_wdtac97,
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handle_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 subsys_interface s3c2440_irq_interface = {
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.name = "s3c2440_irq",
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.subsys = &s3c2440_subsys,
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.add_dev = 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 subsys_interface_register(&s3c2440_irq_interface);
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}
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arch_initcall(s3c2440_irq_init);
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