LXR linux/arch/m68k/coldfire/intc-5249.c

   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(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
  28static 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
  36static void intc2_irq_gpio_ack(struct irq_data *d)
  37{
  38        writel(0x1 << (d->irq - MCF_IRQ_GPIO0), MCFSIM2_GPIOINTCLEAR);
  39}
  40
  41static 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
  48static 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
  61arch_initcall(mcf_intc2_init);
  62