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 20 static void intc2_irq_gpio_mask(struct irq_data *d) 21 { 22 u32 imr; 23 imr = readl(MCFSIM2_GPIOINTENABLE); 24 imr &= ~(0x1 << (d->irq - MCF_IRQ_GPIO0)); 25 writel(imr, MCFSIM2_GPIOINTENABLE); 26 } 27 28 static void intc2_irq_gpio_unmask(struct irq_data *d) 29 { 30 u32 imr; 31 imr = readl(MCFSIM2_GPIOINTENABLE); 32 imr |= (0x1 << (d->irq - MCF_IRQ_GPIO0)); 33 writel(imr, MCFSIM2_GPIOINTENABLE); 34 } 35 36 static void intc2_irq_gpio_ack(struct irq_data *d) 37 { 38 writel(0x1 << (d->irq - MCF_IRQ_GPIO0), MCFSIM2_GPIOINTCLEAR); 39 } 40 41 static struct irq_chip intc2_irq_gpio_chip = { 42 .name = "CF-INTC2", 43 .irq_mask = intc2_irq_gpio_mask, 44 .irq_unmask = intc2_irq_gpio_unmask, 45 .irq_ack = intc2_irq_gpio_ack, 46 }; 47 48 static int __init mcf_intc2_init(void) 49 { 50 int irq; 51 52 /* GPIO interrupt sources */ 53 for (irq = MCF_IRQ_GPIO0; (irq <= MCF_IRQ_GPIO7); irq++) { 54 irq_set_chip(irq, &intc2_irq_gpio_chip); 55 irq_set_handler(irq, handle_edge_irq); 56 } 57 58 return 0; 59 } 60 61 arch_initcall(mcf_intc2_init); 62