92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
/*
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* intc2.c -- support for the 2nd INTC controller of the 525x
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*
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* (C) Copyright 2012, Steven King <sfking@fdwdc.com>
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* (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <asm/coldfire.h>
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#include <asm/mcfsim.h>
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static void intc2_irq_gpio_mask(struct irq_data *d)
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{
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u32 imr = readl(MCFSIM2_GPIOINTENABLE);
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u32 type = irqd_get_trigger_type(d);
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int irq = d->irq - MCF_IRQ_GPIO0;
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if (type & IRQ_TYPE_EDGE_RISING)
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imr &= ~(0x001 << irq);
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if (type & IRQ_TYPE_EDGE_FALLING)
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imr &= ~(0x100 << irq);
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writel(imr, MCFSIM2_GPIOINTENABLE);
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}
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static void intc2_irq_gpio_unmask(struct irq_data *d)
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{
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u32 imr = readl(MCFSIM2_GPIOINTENABLE);
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u32 type = irqd_get_trigger_type(d);
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int irq = d->irq - MCF_IRQ_GPIO0;
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if (type & IRQ_TYPE_EDGE_RISING)
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imr |= (0x001 << irq);
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if (type & IRQ_TYPE_EDGE_FALLING)
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imr |= (0x100 << irq);
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writel(imr, MCFSIM2_GPIOINTENABLE);
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}
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static void intc2_irq_gpio_ack(struct irq_data *d)
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{
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u32 imr = 0;
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u32 type = irqd_get_trigger_type(d);
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int irq = d->irq - MCF_IRQ_GPIO0;
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if (type & IRQ_TYPE_EDGE_RISING)
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imr |= (0x001 << irq);
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if (type & IRQ_TYPE_EDGE_FALLING)
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imr |= (0x100 << irq);
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writel(imr, MCFSIM2_GPIOINTCLEAR);
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}
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static int intc2_irq_gpio_set_type(struct irq_data *d, unsigned int f)
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{
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if (f & ~IRQ_TYPE_EDGE_BOTH)
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return -EINVAL;
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return 0;
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}
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static struct irq_chip intc2_irq_gpio_chip = {
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.name = "CF-INTC2",
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.irq_mask = intc2_irq_gpio_mask,
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.irq_unmask = intc2_irq_gpio_unmask,
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.irq_ack = intc2_irq_gpio_ack,
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.irq_set_type = intc2_irq_gpio_set_type,
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};
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static int __init mcf_intc2_init(void)
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{
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int irq;
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/* set the interrupt base for the second interrupt controller */
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writel(MCFINTC2_VECBASE, MCFINTC2_INTBASE);
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/* GPIO interrupt sources */
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for (irq = MCF_IRQ_GPIO0; (irq <= MCF_IRQ_GPIO6); irq++) {
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irq_set_chip(irq, &intc2_irq_gpio_chip);
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irq_set_handler(irq, handle_edge_irq);
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}
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return 0;
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}
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arch_initcall(mcf_intc2_init);
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