/* * linux/arch/arm/mach-pxa/irq.c * * Generic PXA IRQ handling * * Author: Nicolas Pitre * Created: Jun 15, 2001 * Copyright: MontaVista Software Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/init.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/sysdev.h> #include <asm/hardware.h> #include <asm/irq.h> #include <asm/mach/irq.h> #include <asm/arch/pxa-regs.h> #include <asm/arch/pxa2xx-gpio.h> #include "generic.h" #define IRQ_BIT(n) (((n) - PXA_IRQ(0)) & 0x1f) #define _ICMR(n) (*((((n) - PXA_IRQ(0)) & ~0x1f) ? &ICMR2 : &ICMR)) #define _ICLR(n) (*((((n) - PXA_IRQ(0)) & ~0x1f) ? &ICLR2 : &ICLR)) /* * This is for peripheral IRQs internal to the PXA chip. */ static int pxa_internal_irq_nr; static void pxa_mask_irq(unsigned int irq) { _ICMR(irq) &= ~(1 << IRQ_BIT(irq)); } static void pxa_unmask_irq(unsigned int irq) { _ICMR(irq) |= 1 << IRQ_BIT(irq); } static struct irq_chip pxa_internal_irq_chip = { .name = "SC", .ack = pxa_mask_irq, .mask = pxa_mask_irq, .unmask = pxa_unmask_irq, }; void __init pxa_init_irq(int irq_nr, set_wake_t fn) { int irq; pxa_internal_irq_nr = irq_nr; for (irq = 0; irq < irq_nr; irq += 32) { _ICMR(irq) = 0; /* disable all IRQs */ _ICLR(irq) = 0; /* all IRQs are IRQ, not FIQ */ } /* only unmasked interrupts kick us out of idle */ ICCR = 1; for (irq = PXA_IRQ(0); irq < PXA_IRQ(irq_nr); irq++) { set_irq_chip(irq, &pxa_internal_irq_chip); set_irq_handler(irq, handle_level_irq); set_irq_flags(irq, IRQF_VALID); } pxa_internal_irq_chip.set_wake = fn; } #ifdef CONFIG_PM static unsigned long saved_icmr[2]; static int pxa_irq_suspend(struct sys_device *dev, pm_message_t state) { int i, irq = PXA_IRQ(0); for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) { saved_icmr[i] = _ICMR(irq); _ICMR(irq) = 0; } return 0; } static int pxa_irq_resume(struct sys_device *dev) { int i, irq = PXA_IRQ(0); for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) { _ICMR(irq) = saved_icmr[i]; _ICLR(irq) = 0; } ICCR = 1; return 0; } #else #define pxa_irq_suspend NULL #define pxa_irq_resume NULL #endif struct sysdev_class pxa_irq_sysclass = { .name = "irq", .suspend = pxa_irq_suspend, .resume = pxa_irq_resume, }; static int __init pxa_irq_init(void) { return sysdev_class_register(&pxa_irq_sysclass); } core_initcall(pxa_irq_init);