1/* 2 * intc2.c -- support for the 2nd INTC controller of the 5249 3 * 4 * (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com> 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file COPYING in the main directory of this archive 8 * for more details. 9 */ 10 11#include <linux/types.h> 12#include <linux/init.h> 13#include <linux/kernel.h> 14#include <linux/interrupt.h> 15#include <linux/irq.h> 16#include <linux/io.h> 17#include <asm/coldfire.h> 18#include <asm/mcfsim.h> 19 20static void intc2_irq_gpio_mask(unsigned int irq) 21{ 22 u32 imr; 23 imr = readl(MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); 24 imr &= ~(0x1 << (irq - MCFINTC2_GPIOIRQ0)); 25 writel(imr, MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); 26} 27 28static void intc2_irq_gpio_unmask(unsigned int irq) 29{ 30 u32 imr; 31 imr = readl(MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); 32 imr |= (0x1 << (irq - MCFINTC2_GPIOIRQ0)); 33 writel(imr, MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); 34} 35 36static void intc2_irq_gpio_ack(unsigned int irq) 37{ 38 writel(0x1 << (irq - MCFINTC2_GPIOIRQ0), MCF_MBAR2 + MCFSIM2_GPIOINTCLEAR); 39} 40 41static struct irq_chip intc2_irq_gpio_chip = { 42 .name = "CF-INTC2", 43 .mask = intc2_irq_gpio_mask, 44 .unmask = intc2_irq_gpio_unmask, 45 .ack = intc2_irq_gpio_ack, 46}; 47 48static int __init mcf_intc2_init(void) 49{ 50 int irq; 51 52 /* GPIO interrupt sources */ 53 for (irq = MCFINTC2_GPIOIRQ0; (irq <= MCFINTC2_GPIOIRQ7); irq++) 54 irq_desc[irq].chip = &intc2_irq_gpio_chip; 55 56 return 0; 57} 58 59arch_initcall(mcf_intc2_init); 60